Commit | Line | Data |
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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (c) 2001 The Regents of the University of Michigan. |
3 | * All rights reserved. | |
4 | * | |
5 | * Kendrick Smith <kmsmith@umich.edu> | |
6 | * Andy Adamson <kandros@umich.edu> | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * | |
12 | * 1. Redistributions of source code must retain the above copyright | |
13 | * notice, this list of conditions and the following disclaimer. | |
14 | * 2. Redistributions in binary form must reproduce the above copyright | |
15 | * notice, this list of conditions and the following disclaimer in the | |
16 | * documentation and/or other materials provided with the distribution. | |
17 | * 3. Neither the name of the University nor the names of its | |
18 | * contributors may be used to endorse or promote products derived | |
19 | * from this software without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
22 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
23 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
24 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
26 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
27 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
28 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
29 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
30 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
31 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
32 | * | |
33 | */ | |
34 | ||
aceaf78d | 35 | #include <linux/file.h> |
b89f4321 | 36 | #include <linux/fs.h> |
5a0e3ad6 | 37 | #include <linux/slab.h> |
0964a3d3 | 38 | #include <linux/namei.h> |
c2f1a551 | 39 | #include <linux/swap.h> |
17456804 | 40 | #include <linux/pagemap.h> |
7df302f7 | 41 | #include <linux/ratelimit.h> |
68e76ad0 | 42 | #include <linux/sunrpc/svcauth_gss.h> |
5976687a | 43 | #include <linux/sunrpc/addr.h> |
87545899 | 44 | #include <linux/jhash.h> |
169319f1 | 45 | #include <linux/string_helpers.h> |
472d155a | 46 | #include <linux/fsnotify.h> |
d47b295e | 47 | #include <linux/rhashtable.h> |
f4e44b39 | 48 | #include <linux/nfs_ssc.h> |
d47b295e | 49 | |
9a74af21 | 50 | #include "xdr4.h" |
06b332a5 | 51 | #include "xdr4cb.h" |
0a3adade | 52 | #include "vfs.h" |
bfa4b365 | 53 | #include "current_stateid.h" |
1da177e4 | 54 | |
5e1533c7 | 55 | #include "netns.h" |
9cf514cc | 56 | #include "pnfs.h" |
fd4f83fd | 57 | #include "filecache.h" |
dd5e3fbc | 58 | #include "trace.h" |
5e1533c7 | 59 | |
1da177e4 LT |
60 | #define NFSDDBG_FACILITY NFSDDBG_PROC |
61 | ||
03a0497f | 62 | #define all_ones {{ ~0, ~0}, ~0} |
f32f3c2d BF |
63 | static const stateid_t one_stateid = { |
64 | .si_generation = ~0, | |
65 | .si_opaque = all_ones, | |
66 | }; | |
67 | static const stateid_t zero_stateid = { | |
68 | /* all fields zero */ | |
69 | }; | |
19ff0f28 TM |
70 | static const stateid_t currentstateid = { |
71 | .si_generation = 1, | |
72 | }; | |
fb500a7c TM |
73 | static const stateid_t close_stateid = { |
74 | .si_generation = 0xffffffffU, | |
75 | }; | |
f32f3c2d | 76 | |
ec6b5d7b | 77 | static u64 current_sessionid = 1; |
fd39ca9a | 78 | |
f32f3c2d BF |
79 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t))) |
80 | #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t))) | |
19ff0f28 | 81 | #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t))) |
ae254dac | 82 | #define CLOSE_STATEID(stateid) (!memcmp((stateid), &close_stateid, sizeof(stateid_t))) |
1da177e4 | 83 | |
1da177e4 | 84 | /* forward declarations */ |
f9c00c3a | 85 | static bool check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner); |
6011695d | 86 | static void nfs4_free_ol_stateid(struct nfs4_stid *stid); |
362063a5 | 87 | void nfsd4_end_grace(struct nfsd_net *nn); |
624322f1 | 88 | static void _free_cpntf_state_locked(struct nfsd_net *nn, struct nfs4_cpntf_state *cps); |
3341678f | 89 | static void nfsd4_file_hash_remove(struct nfs4_file *fi); |
1da177e4 | 90 | |
8b671b80 BF |
91 | /* Locking: */ |
92 | ||
8b671b80 BF |
93 | /* |
94 | * Currently used for the del_recall_lru and file hash table. In an | |
95 | * effort to decrease the scope of the client_mutex, this spinlock may | |
96 | * eventually cover more: | |
97 | */ | |
cdc97505 | 98 | static DEFINE_SPINLOCK(state_lock); |
8b671b80 | 99 | |
4f34bd05 AE |
100 | enum nfsd4_st_mutex_lock_subclass { |
101 | OPEN_STATEID_MUTEX = 0, | |
102 | LOCK_STATEID_MUTEX = 1, | |
103 | }; | |
104 | ||
b401be22 JL |
105 | /* |
106 | * A waitqueue for all in-progress 4.0 CLOSE operations that are waiting for | |
107 | * the refcount on the open stateid to drop. | |
108 | */ | |
109 | static DECLARE_WAIT_QUEUE_HEAD(close_wq); | |
110 | ||
89c905be BF |
111 | /* |
112 | * A waitqueue where a writer to clients/#/ctl destroying a client can | |
113 | * wait for cl_rpc_users to drop to 0 and then for the client to be | |
114 | * unhashed. | |
115 | */ | |
116 | static DECLARE_WAIT_QUEUE_HEAD(expiry_wq); | |
117 | ||
9258a2d5 | 118 | static struct kmem_cache *client_slab; |
abf1135b CH |
119 | static struct kmem_cache *openowner_slab; |
120 | static struct kmem_cache *lockowner_slab; | |
121 | static struct kmem_cache *file_slab; | |
122 | static struct kmem_cache *stateid_slab; | |
123 | static struct kmem_cache *deleg_slab; | |
8287f009 | 124 | static struct kmem_cache *odstate_slab; |
e60d4398 | 125 | |
66b2b9b2 | 126 | static void free_session(struct nfsd4_session *); |
508dc6e1 | 127 | |
c4cb8974 | 128 | static const struct nfsd4_callback_ops nfsd4_cb_recall_ops; |
76d348fa | 129 | static const struct nfsd4_callback_ops nfsd4_cb_notify_lock_ops; |
c5967721 | 130 | static const struct nfsd4_callback_ops nfsd4_cb_getattr_ops; |
0162ac2b | 131 | |
66af2579 DN |
132 | static struct workqueue_struct *laundry_wq; |
133 | ||
d76cc46b DN |
134 | int nfsd4_create_laundry_wq(void) |
135 | { | |
136 | int rc = 0; | |
137 | ||
138 | laundry_wq = alloc_workqueue("%s", WQ_UNBOUND, 0, "nfsd4"); | |
139 | if (laundry_wq == NULL) | |
140 | rc = -ENOMEM; | |
141 | return rc; | |
142 | } | |
143 | ||
144 | void nfsd4_destroy_laundry_wq(void) | |
145 | { | |
146 | destroy_workqueue(laundry_wq); | |
147 | } | |
148 | ||
f0f51f5c | 149 | static bool is_session_dead(struct nfsd4_session *ses) |
66b2b9b2 | 150 | { |
f0f51f5c | 151 | return ses->se_flags & NFS4_SESSION_DEAD; |
66b2b9b2 BF |
152 | } |
153 | ||
f0f51f5c | 154 | static __be32 mark_session_dead_locked(struct nfsd4_session *ses, int ref_held_by_me) |
508dc6e1 | 155 | { |
f0f51f5c | 156 | if (atomic_read(&ses->se_ref) > ref_held_by_me) |
66b2b9b2 BF |
157 | return nfserr_jukebox; |
158 | ses->se_flags |= NFS4_SESSION_DEAD; | |
159 | return nfs_ok; | |
508dc6e1 BH |
160 | } |
161 | ||
221a6876 BF |
162 | static bool is_client_expired(struct nfs4_client *clp) |
163 | { | |
164 | return clp->cl_time == 0; | |
165 | } | |
166 | ||
3a4ea23d DN |
167 | static void nfsd4_dec_courtesy_client_count(struct nfsd_net *nn, |
168 | struct nfs4_client *clp) | |
169 | { | |
170 | if (clp->cl_state != NFSD4_ACTIVE) | |
171 | atomic_add_unless(&nn->nfsd_courtesy_clients, -1, 0); | |
172 | } | |
173 | ||
221a6876 BF |
174 | static __be32 get_client_locked(struct nfs4_client *clp) |
175 | { | |
0a880a28 TM |
176 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
177 | ||
178 | lockdep_assert_held(&nn->client_lock); | |
179 | ||
221a6876 BF |
180 | if (is_client_expired(clp)) |
181 | return nfserr_expired; | |
14ed14cc | 182 | atomic_inc(&clp->cl_rpc_users); |
3a4ea23d | 183 | nfsd4_dec_courtesy_client_count(nn, clp); |
66af2579 | 184 | clp->cl_state = NFSD4_ACTIVE; |
221a6876 BF |
185 | return nfs_ok; |
186 | } | |
187 | ||
188 | /* must be called under the client_lock */ | |
189 | static inline void | |
190 | renew_client_locked(struct nfs4_client *clp) | |
191 | { | |
192 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
193 | ||
194 | if (is_client_expired(clp)) { | |
195 | WARN_ON(1); | |
196 | printk("%s: client (clientid %08x/%08x) already expired\n", | |
197 | __func__, | |
198 | clp->cl_clientid.cl_boot, | |
199 | clp->cl_clientid.cl_id); | |
200 | return; | |
201 | } | |
202 | ||
221a6876 | 203 | list_move_tail(&clp->cl_lru, &nn->client_lru); |
20b7d86f | 204 | clp->cl_time = ktime_get_boottime_seconds(); |
3a4ea23d | 205 | nfsd4_dec_courtesy_client_count(nn, clp); |
66af2579 | 206 | clp->cl_state = NFSD4_ACTIVE; |
221a6876 BF |
207 | } |
208 | ||
ba138435 | 209 | static void put_client_renew_locked(struct nfs4_client *clp) |
221a6876 | 210 | { |
0a880a28 TM |
211 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
212 | ||
213 | lockdep_assert_held(&nn->client_lock); | |
214 | ||
14ed14cc | 215 | if (!atomic_dec_and_test(&clp->cl_rpc_users)) |
221a6876 BF |
216 | return; |
217 | if (!is_client_expired(clp)) | |
218 | renew_client_locked(clp); | |
89c905be BF |
219 | else |
220 | wake_up_all(&expiry_wq); | |
221a6876 BF |
221 | } |
222 | ||
4b24ca7d JL |
223 | static void put_client_renew(struct nfs4_client *clp) |
224 | { | |
225 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
226 | ||
14ed14cc | 227 | if (!atomic_dec_and_lock(&clp->cl_rpc_users, &nn->client_lock)) |
d6c249b4 JL |
228 | return; |
229 | if (!is_client_expired(clp)) | |
230 | renew_client_locked(clp); | |
89c905be BF |
231 | else |
232 | wake_up_all(&expiry_wq); | |
4b24ca7d JL |
233 | spin_unlock(&nn->client_lock); |
234 | } | |
235 | ||
d4e19e70 TM |
236 | static __be32 nfsd4_get_session_locked(struct nfsd4_session *ses) |
237 | { | |
238 | __be32 status; | |
239 | ||
240 | if (is_session_dead(ses)) | |
241 | return nfserr_badsession; | |
242 | status = get_client_locked(ses->se_client); | |
243 | if (status) | |
244 | return status; | |
245 | atomic_inc(&ses->se_ref); | |
246 | return nfs_ok; | |
247 | } | |
248 | ||
249 | static void nfsd4_put_session_locked(struct nfsd4_session *ses) | |
250 | { | |
251 | struct nfs4_client *clp = ses->se_client; | |
0a880a28 TM |
252 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
253 | ||
254 | lockdep_assert_held(&nn->client_lock); | |
d4e19e70 TM |
255 | |
256 | if (atomic_dec_and_test(&ses->se_ref) && is_session_dead(ses)) | |
257 | free_session(ses); | |
258 | put_client_renew_locked(clp); | |
259 | } | |
260 | ||
261 | static void nfsd4_put_session(struct nfsd4_session *ses) | |
262 | { | |
263 | struct nfs4_client *clp = ses->se_client; | |
264 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
265 | ||
266 | spin_lock(&nn->client_lock); | |
267 | nfsd4_put_session_locked(ses); | |
268 | spin_unlock(&nn->client_lock); | |
269 | } | |
270 | ||
76d348fa JL |
271 | static struct nfsd4_blocked_lock * |
272 | find_blocked_lock(struct nfs4_lockowner *lo, struct knfsd_fh *fh, | |
273 | struct nfsd_net *nn) | |
274 | { | |
275 | struct nfsd4_blocked_lock *cur, *found = NULL; | |
276 | ||
0cc11a61 | 277 | spin_lock(&nn->blocked_locks_lock); |
76d348fa JL |
278 | list_for_each_entry(cur, &lo->lo_blocked, nbl_list) { |
279 | if (fh_match(fh, &cur->nbl_fh)) { | |
280 | list_del_init(&cur->nbl_list); | |
47446d74 | 281 | WARN_ON(list_empty(&cur->nbl_lru)); |
7919d0a2 | 282 | list_del_init(&cur->nbl_lru); |
76d348fa JL |
283 | found = cur; |
284 | break; | |
285 | } | |
286 | } | |
0cc11a61 | 287 | spin_unlock(&nn->blocked_locks_lock); |
76d348fa | 288 | if (found) |
cb03f94f | 289 | locks_delete_block(&found->nbl_lock); |
76d348fa JL |
290 | return found; |
291 | } | |
292 | ||
293 | static struct nfsd4_blocked_lock * | |
294 | find_or_allocate_block(struct nfs4_lockowner *lo, struct knfsd_fh *fh, | |
295 | struct nfsd_net *nn) | |
296 | { | |
297 | struct nfsd4_blocked_lock *nbl; | |
298 | ||
299 | nbl = find_blocked_lock(lo, fh, nn); | |
300 | if (!nbl) { | |
03a0497f | 301 | nbl = kmalloc(sizeof(*nbl), GFP_KERNEL); |
76d348fa | 302 | if (nbl) { |
e1e8399e VA |
303 | INIT_LIST_HEAD(&nbl->nbl_list); |
304 | INIT_LIST_HEAD(&nbl->nbl_lru); | |
76d348fa JL |
305 | fh_copy_shallow(&nbl->nbl_fh, fh); |
306 | locks_init_lock(&nbl->nbl_lock); | |
47446d74 | 307 | kref_init(&nbl->nbl_kref); |
76d348fa JL |
308 | nfsd4_init_cb(&nbl->nbl_cb, lo->lo_owner.so_client, |
309 | &nfsd4_cb_notify_lock_ops, | |
310 | NFSPROC4_CLNT_CB_NOTIFY_LOCK); | |
311 | } | |
312 | } | |
313 | return nbl; | |
314 | } | |
315 | ||
47446d74 VA |
316 | static void |
317 | free_nbl(struct kref *kref) | |
318 | { | |
319 | struct nfsd4_blocked_lock *nbl; | |
320 | ||
321 | nbl = container_of(kref, struct nfsd4_blocked_lock, nbl_kref); | |
05eda6e7 | 322 | locks_release_private(&nbl->nbl_lock); |
47446d74 VA |
323 | kfree(nbl); |
324 | } | |
325 | ||
76d348fa JL |
326 | static void |
327 | free_blocked_lock(struct nfsd4_blocked_lock *nbl) | |
328 | { | |
6aaafc43 | 329 | locks_delete_block(&nbl->nbl_lock); |
47446d74 | 330 | kref_put(&nbl->nbl_kref, free_nbl); |
76d348fa JL |
331 | } |
332 | ||
68ef3bc3 JL |
333 | static void |
334 | remove_blocked_locks(struct nfs4_lockowner *lo) | |
335 | { | |
336 | struct nfs4_client *clp = lo->lo_owner.so_client; | |
337 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
338 | struct nfsd4_blocked_lock *nbl; | |
339 | LIST_HEAD(reaplist); | |
340 | ||
341 | /* Dequeue all blocked locks */ | |
342 | spin_lock(&nn->blocked_locks_lock); | |
343 | while (!list_empty(&lo->lo_blocked)) { | |
344 | nbl = list_first_entry(&lo->lo_blocked, | |
345 | struct nfsd4_blocked_lock, | |
346 | nbl_list); | |
347 | list_del_init(&nbl->nbl_list); | |
47446d74 | 348 | WARN_ON(list_empty(&nbl->nbl_lru)); |
68ef3bc3 JL |
349 | list_move(&nbl->nbl_lru, &reaplist); |
350 | } | |
351 | spin_unlock(&nn->blocked_locks_lock); | |
352 | ||
353 | /* Now free them */ | |
354 | while (!list_empty(&reaplist)) { | |
355 | nbl = list_first_entry(&reaplist, struct nfsd4_blocked_lock, | |
356 | nbl_lru); | |
357 | list_del_init(&nbl->nbl_lru); | |
68ef3bc3 JL |
358 | free_blocked_lock(nbl); |
359 | } | |
360 | } | |
361 | ||
f456458e JL |
362 | static void |
363 | nfsd4_cb_notify_lock_prepare(struct nfsd4_callback *cb) | |
364 | { | |
365 | struct nfsd4_blocked_lock *nbl = container_of(cb, | |
366 | struct nfsd4_blocked_lock, nbl_cb); | |
367 | locks_delete_block(&nbl->nbl_lock); | |
368 | } | |
369 | ||
76d348fa JL |
370 | static int |
371 | nfsd4_cb_notify_lock_done(struct nfsd4_callback *cb, struct rpc_task *task) | |
372 | { | |
1035d654 CL |
373 | trace_nfsd_cb_notify_lock_done(&zero_stateid, task); |
374 | ||
76d348fa JL |
375 | /* |
376 | * Since this is just an optimization, we don't try very hard if it | |
377 | * turns out not to succeed. We'll requeue it on NFS4ERR_DELAY, and | |
378 | * just quit trying on anything else. | |
379 | */ | |
380 | switch (task->tk_status) { | |
381 | case -NFS4ERR_DELAY: | |
382 | rpc_delay(task, 1 * HZ); | |
383 | return 0; | |
384 | default: | |
385 | return 1; | |
386 | } | |
387 | } | |
388 | ||
389 | static void | |
390 | nfsd4_cb_notify_lock_release(struct nfsd4_callback *cb) | |
391 | { | |
392 | struct nfsd4_blocked_lock *nbl = container_of(cb, | |
393 | struct nfsd4_blocked_lock, nbl_cb); | |
394 | ||
395 | free_blocked_lock(nbl); | |
396 | } | |
397 | ||
398 | static const struct nfsd4_callback_ops nfsd4_cb_notify_lock_ops = { | |
f456458e | 399 | .prepare = nfsd4_cb_notify_lock_prepare, |
76d348fa JL |
400 | .done = nfsd4_cb_notify_lock_done, |
401 | .release = nfsd4_cb_notify_lock_release, | |
402 | }; | |
403 | ||
ebd9d2c2 BF |
404 | /* |
405 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
406 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
407 | * only what share bits are currently in force, but also what | |
408 | * combinations of share bits previous opens have used. This allows us | |
3dcd1d8a BF |
409 | * to enforce the recommendation in |
410 | * https://datatracker.ietf.org/doc/html/rfc7530#section-16.19.4 that | |
411 | * the server return an error if the client attempt to downgrade to a | |
412 | * combination of share bits not explicable by closing some of its | |
413 | * previous opens. | |
ebd9d2c2 | 414 | * |
3dcd1d8a | 415 | * This enforcement is arguably incomplete, since we don't keep |
ebd9d2c2 BF |
416 | * track of access/deny bit combinations; so, e.g., we allow: |
417 | * | |
418 | * OPEN allow read, deny write | |
419 | * OPEN allow both, deny none | |
420 | * DOWNGRADE allow read, deny none | |
421 | * | |
422 | * which we should reject. | |
3dcd1d8a BF |
423 | * |
424 | * But you could also argue that our current code is already overkill, | |
425 | * since it only exists to return NFS4ERR_INVAL on incorrect client | |
426 | * behavior. | |
ebd9d2c2 BF |
427 | */ |
428 | static unsigned int | |
429 | bmap_to_share_mode(unsigned long bmap) | |
430 | { | |
431 | int i; | |
432 | unsigned int access = 0; | |
433 | ||
434 | for (i = 1; i < 4; i++) { | |
435 | if (test_bit(i, &bmap)) | |
436 | access |= i; | |
437 | } | |
438 | return access; | |
439 | } | |
440 | ||
441 | /* set share access for a given stateid */ | |
442 | static inline void | |
443 | set_access(u32 access, struct nfs4_ol_stateid *stp) | |
444 | { | |
445 | unsigned char mask = 1 << access; | |
446 | ||
447 | WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH); | |
448 | stp->st_access_bmap |= mask; | |
449 | } | |
450 | ||
451 | /* clear share access for a given stateid */ | |
452 | static inline void | |
453 | clear_access(u32 access, struct nfs4_ol_stateid *stp) | |
454 | { | |
455 | unsigned char mask = 1 << access; | |
456 | ||
457 | WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH); | |
458 | stp->st_access_bmap &= ~mask; | |
459 | } | |
460 | ||
461 | /* test whether a given stateid has access */ | |
462 | static inline bool | |
463 | test_access(u32 access, struct nfs4_ol_stateid *stp) | |
464 | { | |
465 | unsigned char mask = 1 << access; | |
466 | ||
467 | return (bool)(stp->st_access_bmap & mask); | |
468 | } | |
469 | ||
470 | /* set share deny for a given stateid */ | |
471 | static inline void | |
472 | set_deny(u32 deny, struct nfs4_ol_stateid *stp) | |
473 | { | |
474 | unsigned char mask = 1 << deny; | |
475 | ||
476 | WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH); | |
477 | stp->st_deny_bmap |= mask; | |
478 | } | |
479 | ||
480 | /* clear share deny for a given stateid */ | |
481 | static inline void | |
482 | clear_deny(u32 deny, struct nfs4_ol_stateid *stp) | |
483 | { | |
484 | unsigned char mask = 1 << deny; | |
485 | ||
486 | WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH); | |
487 | stp->st_deny_bmap &= ~mask; | |
488 | } | |
489 | ||
490 | /* test whether a given stateid is denying specific access */ | |
491 | static inline bool | |
492 | test_deny(u32 deny, struct nfs4_ol_stateid *stp) | |
493 | { | |
494 | unsigned char mask = 1 << deny; | |
495 | ||
496 | return (bool)(stp->st_deny_bmap & mask); | |
497 | } | |
498 | ||
499 | static int nfs4_access_to_omode(u32 access) | |
500 | { | |
501 | switch (access & NFS4_SHARE_ACCESS_BOTH) { | |
502 | case NFS4_SHARE_ACCESS_READ: | |
503 | return O_RDONLY; | |
504 | case NFS4_SHARE_ACCESS_WRITE: | |
505 | return O_WRONLY; | |
506 | case NFS4_SHARE_ACCESS_BOTH: | |
507 | return O_RDWR; | |
508 | } | |
509 | WARN_ON_ONCE(1); | |
510 | return O_RDONLY; | |
511 | } | |
512 | ||
513 | static inline int | |
514 | access_permit_read(struct nfs4_ol_stateid *stp) | |
515 | { | |
516 | return test_access(NFS4_SHARE_ACCESS_READ, stp) || | |
517 | test_access(NFS4_SHARE_ACCESS_BOTH, stp) || | |
518 | test_access(NFS4_SHARE_ACCESS_WRITE, stp); | |
519 | } | |
520 | ||
521 | static inline int | |
522 | access_permit_write(struct nfs4_ol_stateid *stp) | |
523 | { | |
524 | return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || | |
525 | test_access(NFS4_SHARE_ACCESS_BOTH, stp); | |
526 | } | |
527 | ||
b5971afa KM |
528 | static inline struct nfs4_stateowner * |
529 | nfs4_get_stateowner(struct nfs4_stateowner *sop) | |
530 | { | |
531 | atomic_inc(&sop->so_count); | |
532 | return sop; | |
533 | } | |
534 | ||
7ffb5880 | 535 | static int |
d4f0489f | 536 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner) |
7ffb5880 TM |
537 | { |
538 | return (sop->so_owner.len == owner->len) && | |
d4f0489f | 539 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len); |
7ffb5880 TM |
540 | } |
541 | ||
542 | static struct nfs4_openowner * | |
543 | find_openstateowner_str_locked(unsigned int hashval, struct nfsd4_open *open, | |
d4f0489f | 544 | struct nfs4_client *clp) |
7ffb5880 TM |
545 | { |
546 | struct nfs4_stateowner *so; | |
7ffb5880 | 547 | |
d4f0489f | 548 | lockdep_assert_held(&clp->cl_lock); |
7ffb5880 | 549 | |
d4f0489f TM |
550 | list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[hashval], |
551 | so_strhash) { | |
7ffb5880 TM |
552 | if (!so->so_is_open_owner) |
553 | continue; | |
b5971afa KM |
554 | if (same_owner_str(so, &open->op_owner)) |
555 | return openowner(nfs4_get_stateowner(so)); | |
7ffb5880 TM |
556 | } |
557 | return NULL; | |
558 | } | |
559 | ||
560 | static struct nfs4_openowner * | |
561 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, | |
d4f0489f | 562 | struct nfs4_client *clp) |
7ffb5880 TM |
563 | { |
564 | struct nfs4_openowner *oo; | |
565 | ||
d4f0489f TM |
566 | spin_lock(&clp->cl_lock); |
567 | oo = find_openstateowner_str_locked(hashval, open, clp); | |
568 | spin_unlock(&clp->cl_lock); | |
7ffb5880 TM |
569 | return oo; |
570 | } | |
571 | ||
1da177e4 LT |
572 | static inline u32 |
573 | opaque_hashval(const void *ptr, int nbytes) | |
574 | { | |
575 | unsigned char *cptr = (unsigned char *) ptr; | |
576 | ||
577 | u32 x = 0; | |
578 | while (nbytes--) { | |
579 | x *= 37; | |
580 | x += *cptr++; | |
581 | } | |
582 | return x; | |
583 | } | |
584 | ||
5b095e99 | 585 | static void nfsd4_free_file_rcu(struct rcu_head *rcu) |
32513b40 | 586 | { |
5b095e99 JL |
587 | struct nfs4_file *fp = container_of(rcu, struct nfs4_file, fi_rcu); |
588 | ||
589 | kmem_cache_free(file_slab, fp); | |
32513b40 BF |
590 | } |
591 | ||
e6ba76e1 | 592 | void |
13cd2184 N |
593 | put_nfs4_file(struct nfs4_file *fi) |
594 | { | |
d47b295e | 595 | if (refcount_dec_and_test(&fi->fi_ref)) { |
3341678f | 596 | nfsd4_file_hash_remove(fi); |
8287f009 | 597 | WARN_ON_ONCE(!list_empty(&fi->fi_clnt_odstate)); |
5b095e99 JL |
598 | WARN_ON_ONCE(!list_empty(&fi->fi_delegations)); |
599 | call_rcu(&fi->fi_rcu, nfsd4_free_file_rcu); | |
8b671b80 | 600 | } |
13cd2184 N |
601 | } |
602 | ||
eb82dd39 | 603 | static struct nfsd_file * |
de18643d TM |
604 | find_writeable_file_locked(struct nfs4_file *f) |
605 | { | |
eb82dd39 | 606 | struct nfsd_file *ret; |
de18643d TM |
607 | |
608 | lockdep_assert_held(&f->fi_lock); | |
609 | ||
edd2f552 | 610 | ret = nfsd_file_get(f->fi_fds[O_WRONLY]); |
de18643d | 611 | if (!ret) |
edd2f552 | 612 | ret = nfsd_file_get(f->fi_fds[O_RDWR]); |
de18643d TM |
613 | return ret; |
614 | } | |
615 | ||
eb82dd39 | 616 | static struct nfsd_file * |
de18643d TM |
617 | find_writeable_file(struct nfs4_file *f) |
618 | { | |
eb82dd39 | 619 | struct nfsd_file *ret; |
de18643d TM |
620 | |
621 | spin_lock(&f->fi_lock); | |
622 | ret = find_writeable_file_locked(f); | |
623 | spin_unlock(&f->fi_lock); | |
624 | ||
625 | return ret; | |
626 | } | |
627 | ||
eb82dd39 JL |
628 | static struct nfsd_file * |
629 | find_readable_file_locked(struct nfs4_file *f) | |
de18643d | 630 | { |
eb82dd39 | 631 | struct nfsd_file *ret; |
de18643d TM |
632 | |
633 | lockdep_assert_held(&f->fi_lock); | |
634 | ||
edd2f552 | 635 | ret = nfsd_file_get(f->fi_fds[O_RDONLY]); |
de18643d | 636 | if (!ret) |
edd2f552 | 637 | ret = nfsd_file_get(f->fi_fds[O_RDWR]); |
de18643d TM |
638 | return ret; |
639 | } | |
640 | ||
eb82dd39 | 641 | static struct nfsd_file * |
de18643d TM |
642 | find_readable_file(struct nfs4_file *f) |
643 | { | |
eb82dd39 | 644 | struct nfsd_file *ret; |
de18643d TM |
645 | |
646 | spin_lock(&f->fi_lock); | |
647 | ret = find_readable_file_locked(f); | |
648 | spin_unlock(&f->fi_lock); | |
649 | ||
650 | return ret; | |
651 | } | |
652 | ||
1d3dd1d5 DN |
653 | static struct nfsd_file * |
654 | find_rw_file(struct nfs4_file *f) | |
655 | { | |
656 | struct nfsd_file *ret; | |
657 | ||
658 | spin_lock(&f->fi_lock); | |
659 | ret = nfsd_file_get(f->fi_fds[O_RDWR]); | |
660 | spin_unlock(&f->fi_lock); | |
661 | ||
662 | return ret; | |
663 | } | |
664 | ||
eb82dd39 | 665 | struct nfsd_file * |
de18643d TM |
666 | find_any_file(struct nfs4_file *f) |
667 | { | |
eb82dd39 | 668 | struct nfsd_file *ret; |
de18643d | 669 | |
a451b123 TM |
670 | if (!f) |
671 | return NULL; | |
de18643d | 672 | spin_lock(&f->fi_lock); |
edd2f552 | 673 | ret = nfsd_file_get(f->fi_fds[O_RDWR]); |
de18643d | 674 | if (!ret) { |
edd2f552 | 675 | ret = nfsd_file_get(f->fi_fds[O_WRONLY]); |
de18643d | 676 | if (!ret) |
edd2f552 | 677 | ret = nfsd_file_get(f->fi_fds[O_RDONLY]); |
de18643d TM |
678 | } |
679 | spin_unlock(&f->fi_lock); | |
680 | return ret; | |
681 | } | |
682 | ||
e0aa6510 | 683 | static struct nfsd_file *find_any_file_locked(struct nfs4_file *f) |
9affa435 | 684 | { |
e0aa6510 JL |
685 | lockdep_assert_held(&f->fi_lock); |
686 | ||
687 | if (f->fi_fds[O_RDWR]) | |
688 | return f->fi_fds[O_RDWR]; | |
689 | if (f->fi_fds[O_WRONLY]) | |
690 | return f->fi_fds[O_WRONLY]; | |
691 | if (f->fi_fds[O_RDONLY]) | |
692 | return f->fi_fds[O_RDONLY]; | |
693 | return NULL; | |
694 | } | |
695 | ||
02a3508d | 696 | static atomic_long_t num_delegations; |
697ce9be | 697 | unsigned long max_delegations; |
ef0f3390 N |
698 | |
699 | /* | |
700 | * Open owner state (share locks) | |
701 | */ | |
702 | ||
16bfdaaf BF |
703 | /* hash tables for lock and open owners */ |
704 | #define OWNER_HASH_BITS 8 | |
705 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
706 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
ef0f3390 | 707 | |
d4f0489f | 708 | static unsigned int ownerstr_hashval(struct xdr_netobj *ownername) |
ddc04c41 BF |
709 | { |
710 | unsigned int ret; | |
711 | ||
712 | ret = opaque_hashval(ownername->data, ownername->len); | |
16bfdaaf | 713 | return ret & OWNER_HASH_MASK; |
ddc04c41 | 714 | } |
ef0f3390 | 715 | |
d47b295e | 716 | static struct rhltable nfs4_file_rhltable ____cacheline_aligned_in_smp; |
ca943217 | 717 | |
d47b295e CL |
718 | static const struct rhashtable_params nfs4_file_rhash_params = { |
719 | .key_len = sizeof_field(struct nfs4_file, fi_inode), | |
720 | .key_offset = offsetof(struct nfs4_file, fi_inode), | |
721 | .head_offset = offsetof(struct nfs4_file, fi_rlist), | |
ca943217 | 722 | |
d47b295e CL |
723 | /* |
724 | * Start with a single page hash table to reduce resizing churn | |
725 | * on light workloads. | |
726 | */ | |
727 | .min_size = 256, | |
728 | .automatic_shrinking = true, | |
729 | }; | |
ef0f3390 | 730 | |
3d694271 DN |
731 | /* |
732 | * Check if courtesy clients have conflicting access and resolve it if possible | |
733 | * | |
734 | * access: is op_share_access if share_access is true. | |
735 | * Check if access mode, op_share_access, would conflict with | |
736 | * the current deny mode of the file 'fp'. | |
737 | * access: is op_share_deny if share_access is false. | |
738 | * Check if the deny mode, op_share_deny, would conflict with | |
739 | * current access of the file 'fp'. | |
740 | * stp: skip checking this entry. | |
741 | * new_stp: normal open, not open upgrade. | |
742 | * | |
743 | * Function returns: | |
744 | * false - access/deny mode conflict with normal client. | |
745 | * true - no conflict or conflict with courtesy client(s) is resolved. | |
746 | */ | |
747 | static bool | |
748 | nfs4_resolve_deny_conflicts_locked(struct nfs4_file *fp, bool new_stp, | |
749 | struct nfs4_ol_stateid *stp, u32 access, bool share_access) | |
750 | { | |
751 | struct nfs4_ol_stateid *st; | |
752 | bool resolvable = true; | |
753 | unsigned char bmap; | |
754 | struct nfsd_net *nn; | |
755 | struct nfs4_client *clp; | |
756 | ||
757 | lockdep_assert_held(&fp->fi_lock); | |
758 | list_for_each_entry(st, &fp->fi_stateids, st_perfile) { | |
759 | /* ignore lock stateid */ | |
760 | if (st->st_openstp) | |
761 | continue; | |
762 | if (st == stp && new_stp) | |
763 | continue; | |
764 | /* check file access against deny mode or vice versa */ | |
765 | bmap = share_access ? st->st_deny_bmap : st->st_access_bmap; | |
766 | if (!(access & bmap_to_share_mode(bmap))) | |
767 | continue; | |
768 | clp = st->st_stid.sc_client; | |
769 | if (try_to_expire_client(clp)) | |
770 | continue; | |
771 | resolvable = false; | |
772 | break; | |
773 | } | |
774 | if (resolvable) { | |
775 | clp = stp->st_stid.sc_client; | |
776 | nn = net_generic(clp->net, nfsd_net_id); | |
777 | mod_delayed_work(laundry_wq, &nn->laundromat_work, 0); | |
778 | } | |
779 | return resolvable; | |
780 | } | |
781 | ||
12659651 JL |
782 | static void |
783 | __nfs4_file_get_access(struct nfs4_file *fp, u32 access) | |
3477565e | 784 | { |
7214e860 JL |
785 | lockdep_assert_held(&fp->fi_lock); |
786 | ||
12659651 JL |
787 | if (access & NFS4_SHARE_ACCESS_WRITE) |
788 | atomic_inc(&fp->fi_access[O_WRONLY]); | |
789 | if (access & NFS4_SHARE_ACCESS_READ) | |
790 | atomic_inc(&fp->fi_access[O_RDONLY]); | |
3477565e BF |
791 | } |
792 | ||
12659651 JL |
793 | static __be32 |
794 | nfs4_file_get_access(struct nfs4_file *fp, u32 access) | |
998db52c | 795 | { |
7214e860 JL |
796 | lockdep_assert_held(&fp->fi_lock); |
797 | ||
12659651 JL |
798 | /* Does this access mode make sense? */ |
799 | if (access & ~NFS4_SHARE_ACCESS_BOTH) | |
800 | return nfserr_inval; | |
801 | ||
baeb4ff0 JL |
802 | /* Does it conflict with a deny mode already set? */ |
803 | if ((access & fp->fi_share_deny) != 0) | |
804 | return nfserr_share_denied; | |
805 | ||
12659651 JL |
806 | __nfs4_file_get_access(fp, access); |
807 | return nfs_ok; | |
998db52c BF |
808 | } |
809 | ||
baeb4ff0 JL |
810 | static __be32 nfs4_file_check_deny(struct nfs4_file *fp, u32 deny) |
811 | { | |
812 | /* Common case is that there is no deny mode. */ | |
813 | if (deny) { | |
814 | /* Does this deny mode make sense? */ | |
815 | if (deny & ~NFS4_SHARE_DENY_BOTH) | |
816 | return nfserr_inval; | |
817 | ||
818 | if ((deny & NFS4_SHARE_DENY_READ) && | |
819 | atomic_read(&fp->fi_access[O_RDONLY])) | |
820 | return nfserr_share_denied; | |
821 | ||
822 | if ((deny & NFS4_SHARE_DENY_WRITE) && | |
823 | atomic_read(&fp->fi_access[O_WRONLY])) | |
824 | return nfserr_share_denied; | |
825 | } | |
826 | return nfs_ok; | |
827 | } | |
828 | ||
998db52c | 829 | static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
f9d7562f | 830 | { |
de18643d TM |
831 | might_lock(&fp->fi_lock); |
832 | ||
833 | if (atomic_dec_and_lock(&fp->fi_access[oflag], &fp->fi_lock)) { | |
fd4f83fd JL |
834 | struct nfsd_file *f1 = NULL; |
835 | struct nfsd_file *f2 = NULL; | |
de18643d | 836 | |
6d338b51 | 837 | swap(f1, fp->fi_fds[oflag]); |
0c7c3e67 | 838 | if (atomic_read(&fp->fi_access[1 - oflag]) == 0) |
6d338b51 | 839 | swap(f2, fp->fi_fds[O_RDWR]); |
de18643d TM |
840 | spin_unlock(&fp->fi_lock); |
841 | if (f1) | |
dcf3f809 | 842 | nfsd_file_put(f1); |
de18643d | 843 | if (f2) |
dcf3f809 | 844 | nfsd_file_put(f2); |
f9d7562f BF |
845 | } |
846 | } | |
847 | ||
12659651 | 848 | static void nfs4_file_put_access(struct nfs4_file *fp, u32 access) |
998db52c | 849 | { |
12659651 JL |
850 | WARN_ON_ONCE(access & ~NFS4_SHARE_ACCESS_BOTH); |
851 | ||
852 | if (access & NFS4_SHARE_ACCESS_WRITE) | |
998db52c | 853 | __nfs4_file_put_access(fp, O_WRONLY); |
12659651 JL |
854 | if (access & NFS4_SHARE_ACCESS_READ) |
855 | __nfs4_file_put_access(fp, O_RDONLY); | |
998db52c BF |
856 | } |
857 | ||
8287f009 SB |
858 | /* |
859 | * Allocate a new open/delegation state counter. This is needed for | |
860 | * pNFS for proper return on close semantics. | |
861 | * | |
862 | * Note that we only allocate it for pNFS-enabled exports, otherwise | |
863 | * all pointers to struct nfs4_clnt_odstate are always NULL. | |
864 | */ | |
865 | static struct nfs4_clnt_odstate * | |
866 | alloc_clnt_odstate(struct nfs4_client *clp) | |
867 | { | |
868 | struct nfs4_clnt_odstate *co; | |
869 | ||
870 | co = kmem_cache_zalloc(odstate_slab, GFP_KERNEL); | |
871 | if (co) { | |
872 | co->co_client = clp; | |
cff7cb2e | 873 | refcount_set(&co->co_odcount, 1); |
8287f009 SB |
874 | } |
875 | return co; | |
876 | } | |
877 | ||
878 | static void | |
879 | hash_clnt_odstate_locked(struct nfs4_clnt_odstate *co) | |
880 | { | |
881 | struct nfs4_file *fp = co->co_file; | |
882 | ||
883 | lockdep_assert_held(&fp->fi_lock); | |
884 | list_add(&co->co_perfile, &fp->fi_clnt_odstate); | |
885 | } | |
886 | ||
887 | static inline void | |
888 | get_clnt_odstate(struct nfs4_clnt_odstate *co) | |
889 | { | |
890 | if (co) | |
cff7cb2e | 891 | refcount_inc(&co->co_odcount); |
8287f009 SB |
892 | } |
893 | ||
894 | static void | |
895 | put_clnt_odstate(struct nfs4_clnt_odstate *co) | |
896 | { | |
897 | struct nfs4_file *fp; | |
898 | ||
899 | if (!co) | |
900 | return; | |
901 | ||
902 | fp = co->co_file; | |
cff7cb2e | 903 | if (refcount_dec_and_lock(&co->co_odcount, &fp->fi_lock)) { |
8287f009 SB |
904 | list_del(&co->co_perfile); |
905 | spin_unlock(&fp->fi_lock); | |
906 | ||
907 | nfsd4_return_all_file_layouts(co->co_client, fp); | |
908 | kmem_cache_free(odstate_slab, co); | |
909 | } | |
910 | } | |
911 | ||
912 | static struct nfs4_clnt_odstate * | |
913 | find_or_hash_clnt_odstate(struct nfs4_file *fp, struct nfs4_clnt_odstate *new) | |
914 | { | |
915 | struct nfs4_clnt_odstate *co; | |
916 | struct nfs4_client *cl; | |
917 | ||
918 | if (!new) | |
919 | return NULL; | |
920 | ||
921 | cl = new->co_client; | |
922 | ||
923 | spin_lock(&fp->fi_lock); | |
924 | list_for_each_entry(co, &fp->fi_clnt_odstate, co_perfile) { | |
925 | if (co->co_client == cl) { | |
926 | get_clnt_odstate(co); | |
927 | goto out; | |
928 | } | |
929 | } | |
930 | co = new; | |
931 | co->co_file = fp; | |
932 | hash_clnt_odstate_locked(new); | |
933 | out: | |
934 | spin_unlock(&fp->fi_lock); | |
935 | return co; | |
936 | } | |
937 | ||
d19fb70d KM |
938 | struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct kmem_cache *slab, |
939 | void (*sc_free)(struct nfs4_stid *)) | |
2a74aba7 | 940 | { |
3abdb607 | 941 | struct nfs4_stid *stid; |
6136d2b4 | 942 | int new_id; |
2a74aba7 | 943 | |
f8338834 | 944 | stid = kmem_cache_zalloc(slab, GFP_KERNEL); |
3abdb607 BF |
945 | if (!stid) |
946 | return NULL; | |
947 | ||
4770d722 JL |
948 | idr_preload(GFP_KERNEL); |
949 | spin_lock(&cl->cl_lock); | |
78599c42 BF |
950 | /* Reserving 0 for start of file in nfsdfs "states" file: */ |
951 | new_id = idr_alloc_cyclic(&cl->cl_stateids, stid, 1, 0, GFP_NOWAIT); | |
4770d722 JL |
952 | spin_unlock(&cl->cl_lock); |
953 | idr_preload_end(); | |
ebd6c707 | 954 | if (new_id < 0) |
3abdb607 | 955 | goto out_free; |
d19fb70d KM |
956 | |
957 | stid->sc_free = sc_free; | |
2a74aba7 | 958 | stid->sc_client = cl; |
3abdb607 BF |
959 | stid->sc_stateid.si_opaque.so_id = new_id; |
960 | stid->sc_stateid.si_opaque.so_clid = cl->cl_clientid; | |
2a74aba7 | 961 | /* Will be incremented before return to client: */ |
a15dfcd5 | 962 | refcount_set(&stid->sc_count, 1); |
9767feb2 | 963 | spin_lock_init(&stid->sc_lock); |
624322f1 | 964 | INIT_LIST_HEAD(&stid->sc_cp_list); |
996e0938 | 965 | |
996e0938 | 966 | /* |
3abdb607 BF |
967 | * It shouldn't be a problem to reuse an opaque stateid value. |
968 | * I don't think it is for 4.1. But with 4.0 I worry that, for | |
969 | * example, a stray write retransmission could be accepted by | |
970 | * the server when it should have been rejected. Therefore, | |
971 | * adopt a trick from the sctp code to attempt to maximize the | |
972 | * amount of time until an id is reused, by ensuring they always | |
973 | * "increase" (mod INT_MAX): | |
996e0938 | 974 | */ |
3abdb607 BF |
975 | return stid; |
976 | out_free: | |
2c44a234 | 977 | kmem_cache_free(slab, stid); |
3abdb607 | 978 | return NULL; |
2a74aba7 BF |
979 | } |
980 | ||
e0639dc5 OK |
981 | /* |
982 | * Create a unique stateid_t to represent each COPY. | |
983 | */ | |
624322f1 | 984 | static int nfs4_init_cp_state(struct nfsd_net *nn, copy_stateid_t *stid, |
781fde1a | 985 | unsigned char cs_type) |
e0639dc5 OK |
986 | { |
987 | int new_id; | |
988 | ||
781fde1a CL |
989 | stid->cs_stid.si_opaque.so_clid.cl_boot = (u32)nn->boot_time; |
990 | stid->cs_stid.si_opaque.so_clid.cl_id = nn->s2s_cp_cl_id; | |
624322f1 | 991 | |
e0639dc5 OK |
992 | idr_preload(GFP_KERNEL); |
993 | spin_lock(&nn->s2s_cp_lock); | |
624322f1 | 994 | new_id = idr_alloc_cyclic(&nn->s2s_cp_stateids, stid, 0, 0, GFP_NOWAIT); |
781fde1a CL |
995 | stid->cs_stid.si_opaque.so_id = new_id; |
996 | stid->cs_stid.si_generation = 1; | |
e0639dc5 OK |
997 | spin_unlock(&nn->s2s_cp_lock); |
998 | idr_preload_end(); | |
999 | if (new_id < 0) | |
1000 | return 0; | |
81e72297 | 1001 | stid->cs_type = cs_type; |
e0639dc5 OK |
1002 | return 1; |
1003 | } | |
1004 | ||
624322f1 OK |
1005 | int nfs4_init_copy_state(struct nfsd_net *nn, struct nfsd4_copy *copy) |
1006 | { | |
1007 | return nfs4_init_cp_state(nn, ©->cp_stateid, NFS4_COPY_STID); | |
1008 | } | |
1009 | ||
1010 | struct nfs4_cpntf_state *nfs4_alloc_init_cpntf_state(struct nfsd_net *nn, | |
1011 | struct nfs4_stid *p_stid) | |
1012 | { | |
1013 | struct nfs4_cpntf_state *cps; | |
1014 | ||
1015 | cps = kzalloc(sizeof(struct nfs4_cpntf_state), GFP_KERNEL); | |
1016 | if (!cps) | |
1017 | return NULL; | |
20b7d86f | 1018 | cps->cpntf_time = ktime_get_boottime_seconds(); |
781fde1a | 1019 | refcount_set(&cps->cp_stateid.cs_count, 1); |
624322f1 OK |
1020 | if (!nfs4_init_cp_state(nn, &cps->cp_stateid, NFS4_COPYNOTIFY_STID)) |
1021 | goto out_free; | |
1022 | spin_lock(&nn->s2s_cp_lock); | |
1023 | list_add(&cps->cp_list, &p_stid->sc_cp_list); | |
1024 | spin_unlock(&nn->s2s_cp_lock); | |
1025 | return cps; | |
1026 | out_free: | |
1027 | kfree(cps); | |
1028 | return NULL; | |
1029 | } | |
1030 | ||
1031 | void nfs4_free_copy_state(struct nfsd4_copy *copy) | |
e0639dc5 OK |
1032 | { |
1033 | struct nfsd_net *nn; | |
1034 | ||
81e72297 DN |
1035 | if (copy->cp_stateid.cs_type != NFS4_COPY_STID) |
1036 | return; | |
e0639dc5 OK |
1037 | nn = net_generic(copy->cp_clp->net, nfsd_net_id); |
1038 | spin_lock(&nn->s2s_cp_lock); | |
624322f1 | 1039 | idr_remove(&nn->s2s_cp_stateids, |
781fde1a | 1040 | copy->cp_stateid.cs_stid.si_opaque.so_id); |
624322f1 OK |
1041 | spin_unlock(&nn->s2s_cp_lock); |
1042 | } | |
1043 | ||
1044 | static void nfs4_free_cpntf_statelist(struct net *net, struct nfs4_stid *stid) | |
1045 | { | |
1046 | struct nfs4_cpntf_state *cps; | |
1047 | struct nfsd_net *nn; | |
1048 | ||
1049 | nn = net_generic(net, nfsd_net_id); | |
1050 | spin_lock(&nn->s2s_cp_lock); | |
1051 | while (!list_empty(&stid->sc_cp_list)) { | |
1052 | cps = list_first_entry(&stid->sc_cp_list, | |
1053 | struct nfs4_cpntf_state, cp_list); | |
1054 | _free_cpntf_state_locked(nn, cps); | |
1055 | } | |
e0639dc5 OK |
1056 | spin_unlock(&nn->s2s_cp_lock); |
1057 | } | |
1058 | ||
b49e084d | 1059 | static struct nfs4_ol_stateid * nfs4_alloc_open_stateid(struct nfs4_client *clp) |
4cdc951b | 1060 | { |
6011695d | 1061 | struct nfs4_stid *stid; |
6011695d | 1062 | |
d19fb70d | 1063 | stid = nfs4_alloc_stid(clp, stateid_slab, nfs4_free_ol_stateid); |
6011695d TM |
1064 | if (!stid) |
1065 | return NULL; | |
1066 | ||
d19fb70d | 1067 | return openlockstateid(stid); |
6011695d TM |
1068 | } |
1069 | ||
1070 | static void nfs4_free_deleg(struct nfs4_stid *stid) | |
1071 | { | |
895ddf5e JL |
1072 | struct nfs4_delegation *dp = delegstateid(stid); |
1073 | ||
1074 | WARN_ON_ONCE(!list_empty(&stid->sc_cp_list)); | |
1075 | WARN_ON_ONCE(!list_empty(&dp->dl_perfile)); | |
1076 | WARN_ON_ONCE(!list_empty(&dp->dl_perclnt)); | |
1077 | WARN_ON_ONCE(!list_empty(&dp->dl_recall_lru)); | |
6011695d TM |
1078 | kmem_cache_free(deleg_slab, stid); |
1079 | atomic_long_dec(&num_delegations); | |
4cdc951b BF |
1080 | } |
1081 | ||
6282cd56 N |
1082 | /* |
1083 | * When we recall a delegation, we should be careful not to hand it | |
1084 | * out again straight away. | |
1085 | * To ensure this we keep a pair of bloom filters ('new' and 'old') | |
1086 | * in which the filehandles of recalled delegations are "stored". | |
1087 | * If a filehandle appear in either filter, a delegation is blocked. | |
1088 | * When a delegation is recalled, the filehandle is stored in the "new" | |
1089 | * filter. | |
1090 | * Every 30 seconds we swap the filters and clear the "new" one, | |
1091 | * unless both are empty of course. | |
1092 | * | |
1093 | * Each filter is 256 bits. We hash the filehandle to 32bit and use the | |
1094 | * low 3 bytes as hash-table indices. | |
1095 | * | |
f54fe962 | 1096 | * 'blocked_delegations_lock', which is always taken in block_delegations(), |
6282cd56 N |
1097 | * is used to manage concurrent access. Testing does not need the lock |
1098 | * except when swapping the two filters. | |
1099 | */ | |
f54fe962 | 1100 | static DEFINE_SPINLOCK(blocked_delegations_lock); |
6282cd56 N |
1101 | static struct bloom_pair { |
1102 | int entries, old_entries; | |
b3f255ef | 1103 | time64_t swap_time; |
6282cd56 N |
1104 | int new; /* index into 'set' */ |
1105 | DECLARE_BITMAP(set[2], 256); | |
1106 | } blocked_delegations; | |
1107 | ||
1108 | static int delegation_blocked(struct knfsd_fh *fh) | |
1109 | { | |
1110 | u32 hash; | |
1111 | struct bloom_pair *bd = &blocked_delegations; | |
1112 | ||
1113 | if (bd->entries == 0) | |
1114 | return 0; | |
b3f255ef | 1115 | if (ktime_get_seconds() - bd->swap_time > 30) { |
f54fe962 | 1116 | spin_lock(&blocked_delegations_lock); |
b3f255ef | 1117 | if (ktime_get_seconds() - bd->swap_time > 30) { |
6282cd56 N |
1118 | bd->entries -= bd->old_entries; |
1119 | bd->old_entries = bd->entries; | |
1120 | memset(bd->set[bd->new], 0, | |
1121 | sizeof(bd->set[0])); | |
1122 | bd->new = 1-bd->new; | |
b3f255ef | 1123 | bd->swap_time = ktime_get_seconds(); |
6282cd56 | 1124 | } |
f54fe962 | 1125 | spin_unlock(&blocked_delegations_lock); |
6282cd56 | 1126 | } |
d8b26071 | 1127 | hash = jhash(&fh->fh_raw, fh->fh_size, 0); |
6282cd56 N |
1128 | if (test_bit(hash&255, bd->set[0]) && |
1129 | test_bit((hash>>8)&255, bd->set[0]) && | |
1130 | test_bit((hash>>16)&255, bd->set[0])) | |
1131 | return 1; | |
1132 | ||
1133 | if (test_bit(hash&255, bd->set[1]) && | |
1134 | test_bit((hash>>8)&255, bd->set[1]) && | |
1135 | test_bit((hash>>16)&255, bd->set[1])) | |
1136 | return 1; | |
1137 | ||
1138 | return 0; | |
1139 | } | |
1140 | ||
1141 | static void block_delegations(struct knfsd_fh *fh) | |
1142 | { | |
1143 | u32 hash; | |
1144 | struct bloom_pair *bd = &blocked_delegations; | |
1145 | ||
d8b26071 | 1146 | hash = jhash(&fh->fh_raw, fh->fh_size, 0); |
6282cd56 | 1147 | |
f54fe962 | 1148 | spin_lock(&blocked_delegations_lock); |
6282cd56 N |
1149 | __set_bit(hash&255, bd->set[bd->new]); |
1150 | __set_bit((hash>>8)&255, bd->set[bd->new]); | |
1151 | __set_bit((hash>>16)&255, bd->set[bd->new]); | |
1152 | if (bd->entries == 0) | |
b3f255ef | 1153 | bd->swap_time = ktime_get_seconds(); |
6282cd56 | 1154 | bd->entries += 1; |
f54fe962 | 1155 | spin_unlock(&blocked_delegations_lock); |
6282cd56 N |
1156 | } |
1157 | ||
1da177e4 | 1158 | static struct nfs4_delegation * |
86d29b10 | 1159 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_file *fp, |
1d3dd1d5 | 1160 | struct nfs4_clnt_odstate *odstate, u32 dl_type) |
1da177e4 LT |
1161 | { |
1162 | struct nfs4_delegation *dp; | |
2ffda63c | 1163 | struct nfs4_stid *stid; |
02a3508d | 1164 | long n; |
1da177e4 LT |
1165 | |
1166 | dprintk("NFSD alloc_init_deleg\n"); | |
02a3508d TM |
1167 | n = atomic_long_inc_return(&num_delegations); |
1168 | if (n < 0 || n > max_delegations) | |
1169 | goto out_dec; | |
bbf936ed | 1170 | if (delegation_blocked(&fp->fi_fhandle)) |
02a3508d | 1171 | goto out_dec; |
2ffda63c SH |
1172 | stid = nfs4_alloc_stid(clp, deleg_slab, nfs4_free_deleg); |
1173 | if (stid == NULL) | |
02a3508d | 1174 | goto out_dec; |
2ffda63c | 1175 | dp = delegstateid(stid); |
6011695d | 1176 | |
2a74aba7 BF |
1177 | /* |
1178 | * delegation seqid's are never incremented. The 4.1 special | |
6136d2b4 BF |
1179 | * meaning of seqid 0 isn't meaningful, really, but let's avoid |
1180 | * 0 anyway just for consistency and use 1: | |
2a74aba7 BF |
1181 | */ |
1182 | dp->dl_stid.sc_stateid.si_generation = 1; | |
ea1da636 N |
1183 | INIT_LIST_HEAD(&dp->dl_perfile); |
1184 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 | 1185 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
8287f009 SB |
1186 | dp->dl_clnt_odstate = odstate; |
1187 | get_clnt_odstate(odstate); | |
1d3dd1d5 | 1188 | dp->dl_type = dl_type; |
f0b5de1b | 1189 | dp->dl_retries = 1; |
66af2579 | 1190 | dp->dl_recalled = false; |
f0b5de1b | 1191 | nfsd4_init_cb(&dp->dl_recall, dp->dl_stid.sc_client, |
0162ac2b | 1192 | &nfsd4_cb_recall_ops, NFSPROC4_CLNT_CB_RECALL); |
c5967721 DN |
1193 | nfsd4_init_cb(&dp->dl_cb_fattr.ncf_getattr, dp->dl_stid.sc_client, |
1194 | &nfsd4_cb_getattr_ops, NFSPROC4_CLNT_CB_GETATTR); | |
1195 | dp->dl_cb_fattr.ncf_file_modified = false; | |
1196 | dp->dl_cb_fattr.ncf_cb_bmap[0] = FATTR4_WORD0_CHANGE | FATTR4_WORD0_SIZE; | |
86d29b10 BF |
1197 | get_nfs4_file(fp); |
1198 | dp->dl_stid.sc_file = fp; | |
1da177e4 | 1199 | return dp; |
02a3508d TM |
1200 | out_dec: |
1201 | atomic_long_dec(&num_delegations); | |
1202 | return NULL; | |
1da177e4 LT |
1203 | } |
1204 | ||
1205 | void | |
6011695d | 1206 | nfs4_put_stid(struct nfs4_stid *s) |
1da177e4 | 1207 | { |
11b9164a | 1208 | struct nfs4_file *fp = s->sc_file; |
6011695d TM |
1209 | struct nfs4_client *clp = s->sc_client; |
1210 | ||
4770d722 JL |
1211 | might_lock(&clp->cl_lock); |
1212 | ||
a15dfcd5 | 1213 | if (!refcount_dec_and_lock(&s->sc_count, &clp->cl_lock)) { |
b401be22 | 1214 | wake_up_all(&close_wq); |
6011695d | 1215 | return; |
b401be22 | 1216 | } |
6011695d | 1217 | idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id); |
1ac3629b N |
1218 | if (s->sc_status & SC_STATUS_ADMIN_REVOKED) |
1219 | atomic_dec(&s->sc_client->cl_admin_revoked); | |
624322f1 | 1220 | nfs4_free_cpntf_statelist(clp->net, s); |
4770d722 | 1221 | spin_unlock(&clp->cl_lock); |
6011695d | 1222 | s->sc_free(s); |
11b9164a TM |
1223 | if (fp) |
1224 | put_nfs4_file(fp); | |
1da177e4 LT |
1225 | } |
1226 | ||
9767feb2 JL |
1227 | void |
1228 | nfs4_inc_and_copy_stateid(stateid_t *dst, struct nfs4_stid *stid) | |
1229 | { | |
1230 | stateid_t *src = &stid->sc_stateid; | |
1231 | ||
1232 | spin_lock(&stid->sc_lock); | |
1233 | if (unlikely(++src->si_generation == 0)) | |
1234 | src->si_generation = 1; | |
1235 | memcpy(dst, src, sizeof(*dst)); | |
1236 | spin_unlock(&stid->sc_lock); | |
1237 | } | |
1238 | ||
353601e7 | 1239 | static void put_deleg_file(struct nfs4_file *fp) |
1da177e4 | 1240 | { |
eb82dd39 | 1241 | struct nfsd_file *nf = NULL; |
b8232d33 | 1242 | |
6bcc034e | 1243 | spin_lock(&fp->fi_lock); |
353601e7 | 1244 | if (--fp->fi_delegees == 0) |
eb82dd39 | 1245 | swap(nf, fp->fi_deleg_file); |
6bcc034e JL |
1246 | spin_unlock(&fp->fi_lock); |
1247 | ||
eb82dd39 JL |
1248 | if (nf) |
1249 | nfsd_file_put(nf); | |
353601e7 BF |
1250 | } |
1251 | ||
1252 | static void nfs4_unlock_deleg_lease(struct nfs4_delegation *dp) | |
1253 | { | |
1254 | struct nfs4_file *fp = dp->dl_stid.sc_file; | |
eb82dd39 | 1255 | struct nfsd_file *nf = fp->fi_deleg_file; |
353601e7 BF |
1256 | |
1257 | WARN_ON_ONCE(!fp->fi_delegees); | |
1258 | ||
eb82dd39 | 1259 | vfs_setlease(nf->nf_file, F_UNLCK, NULL, (void **)&dp); |
353601e7 | 1260 | put_deleg_file(fp); |
1da177e4 LT |
1261 | } |
1262 | ||
0af6e690 BF |
1263 | static void destroy_unhashed_deleg(struct nfs4_delegation *dp) |
1264 | { | |
1265 | put_clnt_odstate(dp->dl_clnt_odstate); | |
353601e7 | 1266 | nfs4_unlock_deleg_lease(dp); |
0af6e690 BF |
1267 | nfs4_put_stid(&dp->dl_stid); |
1268 | } | |
1269 | ||
34ed9872 | 1270 | /** |
68b18f52 | 1271 | * nfs4_delegation_exists - Discover if this delegation already exists |
34ed9872 AE |
1272 | * @clp: a pointer to the nfs4_client we're granting a delegation to |
1273 | * @fp: a pointer to the nfs4_file we're granting a delegation on | |
1274 | * | |
1275 | * Return: | |
68b18f52 | 1276 | * On success: true iff an existing delegation is found |
34ed9872 AE |
1277 | */ |
1278 | ||
68b18f52 BF |
1279 | static bool |
1280 | nfs4_delegation_exists(struct nfs4_client *clp, struct nfs4_file *fp) | |
34ed9872 AE |
1281 | { |
1282 | struct nfs4_delegation *searchdp = NULL; | |
1283 | struct nfs4_client *searchclp = NULL; | |
1284 | ||
1285 | lockdep_assert_held(&state_lock); | |
1286 | lockdep_assert_held(&fp->fi_lock); | |
1287 | ||
1288 | list_for_each_entry(searchdp, &fp->fi_delegations, dl_perfile) { | |
1289 | searchclp = searchdp->dl_stid.sc_client; | |
1290 | if (clp == searchclp) { | |
51d87bc2 | 1291 | return true; |
34ed9872 AE |
1292 | } |
1293 | } | |
51d87bc2 | 1294 | return false; |
34ed9872 AE |
1295 | } |
1296 | ||
1297 | /** | |
1298 | * hash_delegation_locked - Add a delegation to the appropriate lists | |
1299 | * @dp: a pointer to the nfs4_delegation we are adding. | |
1300 | * @fp: a pointer to the nfs4_file we're granting a delegation on | |
1301 | * | |
1302 | * Return: | |
1303 | * On success: NULL if the delegation was successfully hashed. | |
1304 | * | |
1305 | * On error: -EAGAIN if one was previously granted to this | |
1306 | * nfs4_client for this nfs4_file. Delegation is not hashed. | |
1307 | * | |
1308 | */ | |
1309 | ||
1310 | static int | |
931ee56c BH |
1311 | hash_delegation_locked(struct nfs4_delegation *dp, struct nfs4_file *fp) |
1312 | { | |
34ed9872 AE |
1313 | struct nfs4_client *clp = dp->dl_stid.sc_client; |
1314 | ||
cdc97505 | 1315 | lockdep_assert_held(&state_lock); |
417c6629 | 1316 | lockdep_assert_held(&fp->fi_lock); |
77945728 | 1317 | lockdep_assert_held(&clp->cl_lock); |
931ee56c | 1318 | |
68b18f52 BF |
1319 | if (nfs4_delegation_exists(clp, fp)) |
1320 | return -EAGAIN; | |
a15dfcd5 | 1321 | refcount_inc(&dp->dl_stid.sc_count); |
3f29cc82 | 1322 | dp->dl_stid.sc_type = SC_TYPE_DELEG; |
931ee56c | 1323 | list_add(&dp->dl_perfile, &fp->fi_delegations); |
34ed9872 AE |
1324 | list_add(&dp->dl_perclnt, &clp->cl_delegations); |
1325 | return 0; | |
931ee56c BH |
1326 | } |
1327 | ||
548ec080 BF |
1328 | static bool delegation_hashed(struct nfs4_delegation *dp) |
1329 | { | |
1330 | return !(list_empty(&dp->dl_perfile)); | |
1331 | } | |
1332 | ||
3fcbbd24 | 1333 | static bool |
3f29cc82 | 1334 | unhash_delegation_locked(struct nfs4_delegation *dp, unsigned short statusmask) |
1da177e4 | 1335 | { |
11b9164a | 1336 | struct nfs4_file *fp = dp->dl_stid.sc_file; |
02e1215f | 1337 | |
42690676 JL |
1338 | lockdep_assert_held(&state_lock); |
1339 | ||
548ec080 | 1340 | if (!delegation_hashed(dp)) |
3fcbbd24 JL |
1341 | return false; |
1342 | ||
06efa667 N |
1343 | if (statusmask == SC_STATUS_REVOKED && |
1344 | dp->dl_stid.sc_client->cl_minorversion == 0) | |
3f29cc82 N |
1345 | statusmask = SC_STATUS_CLOSED; |
1346 | dp->dl_stid.sc_status |= statusmask; | |
06efa667 N |
1347 | if (statusmask & SC_STATUS_ADMIN_REVOKED) |
1348 | atomic_inc(&dp->dl_stid.sc_client->cl_admin_revoked); | |
3f29cc82 | 1349 | |
d55a166c JL |
1350 | /* Ensure that deleg break won't try to requeue it */ |
1351 | ++dp->dl_time; | |
417c6629 | 1352 | spin_lock(&fp->fi_lock); |
931ee56c | 1353 | list_del_init(&dp->dl_perclnt); |
1da177e4 | 1354 | list_del_init(&dp->dl_recall_lru); |
02e1215f JL |
1355 | list_del_init(&dp->dl_perfile); |
1356 | spin_unlock(&fp->fi_lock); | |
3fcbbd24 | 1357 | return true; |
3bd64a5b BF |
1358 | } |
1359 | ||
3bd64a5b BF |
1360 | static void destroy_delegation(struct nfs4_delegation *dp) |
1361 | { | |
3fcbbd24 JL |
1362 | bool unhashed; |
1363 | ||
42690676 | 1364 | spin_lock(&state_lock); |
3f29cc82 | 1365 | unhashed = unhash_delegation_locked(dp, SC_STATUS_CLOSED); |
42690676 | 1366 | spin_unlock(&state_lock); |
0af6e690 BF |
1367 | if (unhashed) |
1368 | destroy_unhashed_deleg(dp); | |
3bd64a5b BF |
1369 | } |
1370 | ||
1371 | static void revoke_delegation(struct nfs4_delegation *dp) | |
1372 | { | |
1373 | struct nfs4_client *clp = dp->dl_stid.sc_client; | |
1374 | ||
2d4a532d JL |
1375 | WARN_ON(!list_empty(&dp->dl_recall_lru)); |
1376 | ||
a1c74569 CL |
1377 | trace_nfsd_stid_revoke(&dp->dl_stid); |
1378 | ||
06efa667 N |
1379 | if (dp->dl_stid.sc_status & |
1380 | (SC_STATUS_REVOKED | SC_STATUS_ADMIN_REVOKED)) { | |
3b816601 | 1381 | spin_lock(&clp->cl_lock); |
0af6e690 | 1382 | refcount_inc(&dp->dl_stid.sc_count); |
2d4a532d JL |
1383 | list_add(&dp->dl_recall_lru, &clp->cl_revoked); |
1384 | spin_unlock(&clp->cl_lock); | |
3bd64a5b | 1385 | } |
0af6e690 | 1386 | destroy_unhashed_deleg(dp); |
3bd64a5b BF |
1387 | } |
1388 | ||
3f29cc82 N |
1389 | /* |
1390 | * SETCLIENTID state | |
1da177e4 LT |
1391 | */ |
1392 | ||
ddc04c41 BF |
1393 | static unsigned int clientid_hashval(u32 id) |
1394 | { | |
1395 | return id & CLIENT_HASH_MASK; | |
1396 | } | |
1397 | ||
6b189105 | 1398 | static unsigned int clientstr_hashval(struct xdr_netobj name) |
ddc04c41 | 1399 | { |
6b189105 | 1400 | return opaque_hashval(name.data, 8) & CLIENT_HASH_MASK; |
ddc04c41 BF |
1401 | } |
1402 | ||
baeb4ff0 JL |
1403 | /* |
1404 | * A stateid that had a deny mode associated with it is being released | |
1405 | * or downgraded. Recalculate the deny mode on the file. | |
1406 | */ | |
1407 | static void | |
1408 | recalculate_deny_mode(struct nfs4_file *fp) | |
1409 | { | |
1410 | struct nfs4_ol_stateid *stp; | |
1411 | ||
1412 | spin_lock(&fp->fi_lock); | |
1413 | fp->fi_share_deny = 0; | |
1414 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) | |
1415 | fp->fi_share_deny |= bmap_to_share_mode(stp->st_deny_bmap); | |
1416 | spin_unlock(&fp->fi_lock); | |
1417 | } | |
1418 | ||
1419 | static void | |
1420 | reset_union_bmap_deny(u32 deny, struct nfs4_ol_stateid *stp) | |
1421 | { | |
1422 | int i; | |
1423 | bool change = false; | |
1424 | ||
1425 | for (i = 1; i < 4; i++) { | |
1426 | if ((i & deny) != i) { | |
1427 | change = true; | |
1428 | clear_deny(i, stp); | |
1429 | } | |
1430 | } | |
1431 | ||
1432 | /* Recalculate per-file deny mode if there was a change */ | |
1433 | if (change) | |
11b9164a | 1434 | recalculate_deny_mode(stp->st_stid.sc_file); |
baeb4ff0 JL |
1435 | } |
1436 | ||
82c5ff1b JL |
1437 | /* release all access and file references for a given stateid */ |
1438 | static void | |
1439 | release_all_access(struct nfs4_ol_stateid *stp) | |
1440 | { | |
1441 | int i; | |
11b9164a | 1442 | struct nfs4_file *fp = stp->st_stid.sc_file; |
baeb4ff0 JL |
1443 | |
1444 | if (fp && stp->st_deny_bmap != 0) | |
1445 | recalculate_deny_mode(fp); | |
82c5ff1b JL |
1446 | |
1447 | for (i = 1; i < 4; i++) { | |
1448 | if (test_access(i, stp)) | |
11b9164a | 1449 | nfs4_file_put_access(stp->st_stid.sc_file, i); |
82c5ff1b JL |
1450 | clear_access(i, stp); |
1451 | } | |
1452 | } | |
1453 | ||
d50ffded KM |
1454 | static inline void nfs4_free_stateowner(struct nfs4_stateowner *sop) |
1455 | { | |
1456 | kfree(sop->so_owner.data); | |
1457 | sop->so_ops->so_free(sop); | |
1458 | } | |
1459 | ||
6b180f0b JL |
1460 | static void nfs4_put_stateowner(struct nfs4_stateowner *sop) |
1461 | { | |
a819ecc1 JL |
1462 | struct nfs4_client *clp = sop->so_client; |
1463 | ||
1464 | might_lock(&clp->cl_lock); | |
1465 | ||
1466 | if (!atomic_dec_and_lock(&sop->so_count, &clp->cl_lock)) | |
6b180f0b | 1467 | return; |
8f4b54c5 | 1468 | sop->so_ops->so_unhash(sop); |
a819ecc1 | 1469 | spin_unlock(&clp->cl_lock); |
d50ffded | 1470 | nfs4_free_stateowner(sop); |
6b180f0b JL |
1471 | } |
1472 | ||
a451b123 TM |
1473 | static bool |
1474 | nfs4_ol_stateid_unhashed(const struct nfs4_ol_stateid *stp) | |
1475 | { | |
1476 | return list_empty(&stp->st_perfile); | |
1477 | } | |
1478 | ||
e8568739 | 1479 | static bool unhash_ol_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 1480 | { |
11b9164a | 1481 | struct nfs4_file *fp = stp->st_stid.sc_file; |
1d31a253 | 1482 | |
1c755dc1 JL |
1483 | lockdep_assert_held(&stp->st_stateowner->so_client->cl_lock); |
1484 | ||
e8568739 JL |
1485 | if (list_empty(&stp->st_perfile)) |
1486 | return false; | |
1487 | ||
1d31a253 | 1488 | spin_lock(&fp->fi_lock); |
e8568739 | 1489 | list_del_init(&stp->st_perfile); |
1d31a253 | 1490 | spin_unlock(&fp->fi_lock); |
529d7b2a | 1491 | list_del(&stp->st_perstateowner); |
e8568739 | 1492 | return true; |
529d7b2a BF |
1493 | } |
1494 | ||
6011695d | 1495 | static void nfs4_free_ol_stateid(struct nfs4_stid *stid) |
529d7b2a | 1496 | { |
6011695d | 1497 | struct nfs4_ol_stateid *stp = openlockstateid(stid); |
4665e2ba | 1498 | |
8287f009 | 1499 | put_clnt_odstate(stp->st_clnt_odstate); |
6011695d | 1500 | release_all_access(stp); |
d3134b10 JL |
1501 | if (stp->st_stateowner) |
1502 | nfs4_put_stateowner(stp->st_stateowner); | |
019805fe | 1503 | WARN_ON(!list_empty(&stid->sc_cp_list)); |
6011695d | 1504 | kmem_cache_free(stateid_slab, stid); |
529d7b2a BF |
1505 | } |
1506 | ||
b49e084d | 1507 | static void nfs4_free_lock_stateid(struct nfs4_stid *stid) |
529d7b2a | 1508 | { |
b49e084d JL |
1509 | struct nfs4_ol_stateid *stp = openlockstateid(stid); |
1510 | struct nfs4_lockowner *lo = lockowner(stp->st_stateowner); | |
eb82dd39 | 1511 | struct nfsd_file *nf; |
529d7b2a | 1512 | |
eb82dd39 JL |
1513 | nf = find_any_file(stp->st_stid.sc_file); |
1514 | if (nf) { | |
1515 | get_file(nf->nf_file); | |
1516 | filp_close(nf->nf_file, (fl_owner_t)lo); | |
1517 | nfsd_file_put(nf); | |
1518 | } | |
b49e084d JL |
1519 | nfs4_free_ol_stateid(stid); |
1520 | } | |
1521 | ||
2c41beb0 JL |
1522 | /* |
1523 | * Put the persistent reference to an already unhashed generic stateid, while | |
1524 | * holding the cl_lock. If it's the last reference, then put it onto the | |
1525 | * reaplist for later destruction. | |
1526 | */ | |
1527 | static void put_ol_stateid_locked(struct nfs4_ol_stateid *stp, | |
1528 | struct list_head *reaplist) | |
1529 | { | |
1530 | struct nfs4_stid *s = &stp->st_stid; | |
1531 | struct nfs4_client *clp = s->sc_client; | |
1532 | ||
1533 | lockdep_assert_held(&clp->cl_lock); | |
1534 | ||
1535 | WARN_ON_ONCE(!list_empty(&stp->st_locks)); | |
1536 | ||
a15dfcd5 | 1537 | if (!refcount_dec_and_test(&s->sc_count)) { |
2c41beb0 JL |
1538 | wake_up_all(&close_wq); |
1539 | return; | |
1540 | } | |
1541 | ||
1542 | idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id); | |
1ac3629b N |
1543 | if (s->sc_status & SC_STATUS_ADMIN_REVOKED) |
1544 | atomic_dec(&s->sc_client->cl_admin_revoked); | |
2c41beb0 JL |
1545 | list_add(&stp->st_locks, reaplist); |
1546 | } | |
1547 | ||
e8568739 | 1548 | static bool unhash_lock_stateid(struct nfs4_ol_stateid *stp) |
b49e084d | 1549 | { |
f46c445b | 1550 | lockdep_assert_held(&stp->st_stid.sc_client->cl_lock); |
3c1c995c | 1551 | |
a451b123 TM |
1552 | if (!unhash_ol_stateid(stp)) |
1553 | return false; | |
3c1c995c | 1554 | list_del_init(&stp->st_locks); |
3f29cc82 | 1555 | stp->st_stid.sc_status |= SC_STATUS_CLOSED; |
a451b123 | 1556 | return true; |
3c1c995c JL |
1557 | } |
1558 | ||
1559 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) | |
1560 | { | |
f46c445b | 1561 | struct nfs4_client *clp = stp->st_stid.sc_client; |
e8568739 | 1562 | bool unhashed; |
3c1c995c | 1563 | |
f46c445b | 1564 | spin_lock(&clp->cl_lock); |
e8568739 | 1565 | unhashed = unhash_lock_stateid(stp); |
f46c445b | 1566 | spin_unlock(&clp->cl_lock); |
e8568739 JL |
1567 | if (unhashed) |
1568 | nfs4_put_stid(&stp->st_stid); | |
529d7b2a BF |
1569 | } |
1570 | ||
c58c6610 | 1571 | static void unhash_lockowner_locked(struct nfs4_lockowner *lo) |
8f4b54c5 | 1572 | { |
d4f0489f | 1573 | struct nfs4_client *clp = lo->lo_owner.so_client; |
c58c6610 | 1574 | |
d4f0489f | 1575 | lockdep_assert_held(&clp->cl_lock); |
c58c6610 | 1576 | |
8f4b54c5 JL |
1577 | list_del_init(&lo->lo_owner.so_strhash); |
1578 | } | |
1579 | ||
2c41beb0 JL |
1580 | /* |
1581 | * Free a list of generic stateids that were collected earlier after being | |
1582 | * fully unhashed. | |
1583 | */ | |
1584 | static void | |
1585 | free_ol_stateid_reaplist(struct list_head *reaplist) | |
1586 | { | |
1587 | struct nfs4_ol_stateid *stp; | |
fb94d766 | 1588 | struct nfs4_file *fp; |
2c41beb0 JL |
1589 | |
1590 | might_sleep(); | |
1591 | ||
1592 | while (!list_empty(reaplist)) { | |
1593 | stp = list_first_entry(reaplist, struct nfs4_ol_stateid, | |
1594 | st_locks); | |
1595 | list_del(&stp->st_locks); | |
fb94d766 | 1596 | fp = stp->st_stid.sc_file; |
2c41beb0 | 1597 | stp->st_stid.sc_free(&stp->st_stid); |
fb94d766 KM |
1598 | if (fp) |
1599 | put_nfs4_file(fp); | |
2c41beb0 JL |
1600 | } |
1601 | } | |
1602 | ||
d83017f9 JL |
1603 | static void release_open_stateid_locks(struct nfs4_ol_stateid *open_stp, |
1604 | struct list_head *reaplist) | |
3c87b9b7 TM |
1605 | { |
1606 | struct nfs4_ol_stateid *stp; | |
1607 | ||
e8568739 JL |
1608 | lockdep_assert_held(&open_stp->st_stid.sc_client->cl_lock); |
1609 | ||
3c87b9b7 TM |
1610 | while (!list_empty(&open_stp->st_locks)) { |
1611 | stp = list_entry(open_stp->st_locks.next, | |
1612 | struct nfs4_ol_stateid, st_locks); | |
c6540026 | 1613 | unhash_lock_stateid(stp); |
d83017f9 | 1614 | put_ol_stateid_locked(stp, reaplist); |
529d7b2a BF |
1615 | } |
1616 | } | |
1617 | ||
e8568739 | 1618 | static bool unhash_open_stateid(struct nfs4_ol_stateid *stp, |
d83017f9 | 1619 | struct list_head *reaplist) |
2283963f | 1620 | { |
2c41beb0 JL |
1621 | lockdep_assert_held(&stp->st_stid.sc_client->cl_lock); |
1622 | ||
a451b123 TM |
1623 | if (!unhash_ol_stateid(stp)) |
1624 | return false; | |
d83017f9 | 1625 | release_open_stateid_locks(stp, reaplist); |
a451b123 | 1626 | return true; |
38c387b5 BF |
1627 | } |
1628 | ||
1629 | static void release_open_stateid(struct nfs4_ol_stateid *stp) | |
1630 | { | |
2c41beb0 JL |
1631 | LIST_HEAD(reaplist); |
1632 | ||
1633 | spin_lock(&stp->st_stid.sc_client->cl_lock); | |
3f29cc82 | 1634 | stp->st_stid.sc_status |= SC_STATUS_CLOSED; |
e8568739 JL |
1635 | if (unhash_open_stateid(stp, &reaplist)) |
1636 | put_ol_stateid_locked(stp, &reaplist); | |
2c41beb0 JL |
1637 | spin_unlock(&stp->st_stid.sc_client->cl_lock); |
1638 | free_ol_stateid_reaplist(&reaplist); | |
2283963f BF |
1639 | } |
1640 | ||
7ffb5880 | 1641 | static void unhash_openowner_locked(struct nfs4_openowner *oo) |
f1d110ca | 1642 | { |
d4f0489f | 1643 | struct nfs4_client *clp = oo->oo_owner.so_client; |
7ffb5880 | 1644 | |
d4f0489f | 1645 | lockdep_assert_held(&clp->cl_lock); |
7ffb5880 | 1646 | |
8f4b54c5 JL |
1647 | list_del_init(&oo->oo_owner.so_strhash); |
1648 | list_del_init(&oo->oo_perclient); | |
f1d110ca BF |
1649 | } |
1650 | ||
f7a4d872 BF |
1651 | static void release_last_closed_stateid(struct nfs4_openowner *oo) |
1652 | { | |
217526e7 JL |
1653 | struct nfsd_net *nn = net_generic(oo->oo_owner.so_client->net, |
1654 | nfsd_net_id); | |
1655 | struct nfs4_ol_stateid *s; | |
f7a4d872 | 1656 | |
217526e7 JL |
1657 | spin_lock(&nn->client_lock); |
1658 | s = oo->oo_last_closed_stid; | |
f7a4d872 | 1659 | if (s) { |
d3134b10 | 1660 | list_del_init(&oo->oo_close_lru); |
f7a4d872 BF |
1661 | oo->oo_last_closed_stid = NULL; |
1662 | } | |
217526e7 JL |
1663 | spin_unlock(&nn->client_lock); |
1664 | if (s) | |
1665 | nfs4_put_stid(&s->st_stid); | |
f7a4d872 BF |
1666 | } |
1667 | ||
2c41beb0 | 1668 | static void release_openowner(struct nfs4_openowner *oo) |
8f4b54c5 JL |
1669 | { |
1670 | struct nfs4_ol_stateid *stp; | |
d4f0489f | 1671 | struct nfs4_client *clp = oo->oo_owner.so_client; |
2c41beb0 | 1672 | struct list_head reaplist; |
7ffb5880 | 1673 | |
2c41beb0 | 1674 | INIT_LIST_HEAD(&reaplist); |
8f4b54c5 | 1675 | |
2c41beb0 JL |
1676 | spin_lock(&clp->cl_lock); |
1677 | unhash_openowner_locked(oo); | |
8f4b54c5 JL |
1678 | while (!list_empty(&oo->oo_owner.so_stateids)) { |
1679 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
1680 | struct nfs4_ol_stateid, st_perstateowner); | |
e8568739 JL |
1681 | if (unhash_open_stateid(stp, &reaplist)) |
1682 | put_ol_stateid_locked(stp, &reaplist); | |
8f4b54c5 | 1683 | } |
d4f0489f | 1684 | spin_unlock(&clp->cl_lock); |
2c41beb0 | 1685 | free_ol_stateid_reaplist(&reaplist); |
f7a4d872 | 1686 | release_last_closed_stateid(oo); |
6b180f0b | 1687 | nfs4_put_stateowner(&oo->oo_owner); |
f1d110ca BF |
1688 | } |
1689 | ||
1ac3629b N |
1690 | static struct nfs4_stid *find_one_sb_stid(struct nfs4_client *clp, |
1691 | struct super_block *sb, | |
1692 | unsigned int sc_types) | |
1693 | { | |
1694 | unsigned long id, tmp; | |
1695 | struct nfs4_stid *stid; | |
1696 | ||
1697 | spin_lock(&clp->cl_lock); | |
1698 | idr_for_each_entry_ul(&clp->cl_stateids, stid, tmp, id) | |
1699 | if ((stid->sc_type & sc_types) && | |
1700 | stid->sc_status == 0 && | |
1701 | stid->sc_file->fi_inode->i_sb == sb) { | |
1702 | refcount_inc(&stid->sc_count); | |
1703 | break; | |
1704 | } | |
1705 | spin_unlock(&clp->cl_lock); | |
1706 | return stid; | |
1707 | } | |
1708 | ||
1709 | /** | |
1710 | * nfsd4_revoke_states - revoke all nfsv4 states associated with given filesystem | |
1711 | * @net: used to identify instance of nfsd (there is one per net namespace) | |
1712 | * @sb: super_block used to identify target filesystem | |
1713 | * | |
1714 | * All nfs4 states (open, lock, delegation, layout) held by the server instance | |
1715 | * and associated with a file on the given filesystem will be revoked resulting | |
1716 | * in any files being closed and so all references from nfsd to the filesystem | |
1717 | * being released. Thus nfsd will no longer prevent the filesystem from being | |
1718 | * unmounted. | |
1719 | * | |
1720 | * The clients which own the states will subsequently being notified that the | |
1721 | * states have been "admin-revoked". | |
1722 | */ | |
1723 | void nfsd4_revoke_states(struct net *net, struct super_block *sb) | |
1724 | { | |
1725 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1726 | unsigned int idhashval; | |
1727 | unsigned int sc_types; | |
1728 | ||
1e33e141 | 1729 | sc_types = SC_TYPE_OPEN | SC_TYPE_LOCK | SC_TYPE_DELEG | SC_TYPE_LAYOUT; |
1ac3629b N |
1730 | |
1731 | spin_lock(&nn->client_lock); | |
1732 | for (idhashval = 0; idhashval < CLIENT_HASH_MASK; idhashval++) { | |
1733 | struct list_head *head = &nn->conf_id_hashtbl[idhashval]; | |
1734 | struct nfs4_client *clp; | |
1735 | retry: | |
1736 | list_for_each_entry(clp, head, cl_idhash) { | |
1737 | struct nfs4_stid *stid = find_one_sb_stid(clp, sb, | |
1738 | sc_types); | |
1739 | if (stid) { | |
1c13bf9f | 1740 | struct nfs4_ol_stateid *stp; |
06efa667 | 1741 | struct nfs4_delegation *dp; |
1e33e141 | 1742 | struct nfs4_layout_stateid *ls; |
1c13bf9f | 1743 | |
1ac3629b N |
1744 | spin_unlock(&nn->client_lock); |
1745 | switch (stid->sc_type) { | |
39657c74 N |
1746 | case SC_TYPE_OPEN: |
1747 | stp = openlockstateid(stid); | |
1748 | mutex_lock_nested(&stp->st_mutex, | |
1749 | OPEN_STATEID_MUTEX); | |
1750 | ||
1751 | spin_lock(&clp->cl_lock); | |
1752 | if (stid->sc_status == 0) { | |
1753 | stid->sc_status |= | |
1754 | SC_STATUS_ADMIN_REVOKED; | |
1755 | atomic_inc(&clp->cl_admin_revoked); | |
1756 | spin_unlock(&clp->cl_lock); | |
1757 | release_all_access(stp); | |
1758 | } else | |
1759 | spin_unlock(&clp->cl_lock); | |
1760 | mutex_unlock(&stp->st_mutex); | |
1761 | break; | |
1c13bf9f N |
1762 | case SC_TYPE_LOCK: |
1763 | stp = openlockstateid(stid); | |
1764 | mutex_lock_nested(&stp->st_mutex, | |
1765 | LOCK_STATEID_MUTEX); | |
1766 | spin_lock(&clp->cl_lock); | |
1767 | if (stid->sc_status == 0) { | |
1768 | struct nfs4_lockowner *lo = | |
1769 | lockowner(stp->st_stateowner); | |
1770 | struct nfsd_file *nf; | |
1771 | ||
1772 | stid->sc_status |= | |
1773 | SC_STATUS_ADMIN_REVOKED; | |
1774 | atomic_inc(&clp->cl_admin_revoked); | |
1775 | spin_unlock(&clp->cl_lock); | |
1776 | nf = find_any_file(stp->st_stid.sc_file); | |
1777 | if (nf) { | |
1778 | get_file(nf->nf_file); | |
1779 | filp_close(nf->nf_file, | |
1780 | (fl_owner_t)lo); | |
1781 | nfsd_file_put(nf); | |
1782 | } | |
1783 | release_all_access(stp); | |
1784 | } else | |
1785 | spin_unlock(&clp->cl_lock); | |
1786 | mutex_unlock(&stp->st_mutex); | |
1787 | break; | |
06efa667 N |
1788 | case SC_TYPE_DELEG: |
1789 | dp = delegstateid(stid); | |
1790 | spin_lock(&state_lock); | |
1791 | if (!unhash_delegation_locked( | |
1792 | dp, SC_STATUS_ADMIN_REVOKED)) | |
1793 | dp = NULL; | |
1794 | spin_unlock(&state_lock); | |
1795 | if (dp) | |
1796 | revoke_delegation(dp); | |
1797 | break; | |
1e33e141 N |
1798 | case SC_TYPE_LAYOUT: |
1799 | ls = layoutstateid(stid); | |
1800 | nfsd4_close_layout(ls); | |
1801 | break; | |
1ac3629b N |
1802 | } |
1803 | nfs4_put_stid(stid); | |
1804 | spin_lock(&nn->client_lock); | |
d688d858 N |
1805 | if (clp->cl_minorversion == 0) |
1806 | /* Allow cleanup after a lease period. | |
1807 | * store_release ensures cleanup will | |
1808 | * see any newly revoked states if it | |
1809 | * sees the time updated. | |
1810 | */ | |
1811 | nn->nfs40_last_revoke = | |
1812 | ktime_get_boottime_seconds(); | |
1ac3629b N |
1813 | goto retry; |
1814 | } | |
1815 | } | |
1816 | } | |
1817 | spin_unlock(&nn->client_lock); | |
1818 | } | |
1819 | ||
5282fd72 ME |
1820 | static inline int |
1821 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
1822 | { | |
1823 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
1824 | ||
1825 | return sid->sequence % SESSION_HASH_SIZE; | |
1826 | } | |
1827 | ||
135dd002 | 1828 | #ifdef CONFIG_SUNRPC_DEBUG |
5282fd72 ME |
1829 | static inline void |
1830 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
1831 | { | |
1832 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
1833 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
1834 | } | |
8f199b82 TM |
1835 | #else |
1836 | static inline void | |
1837 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
1838 | { | |
1839 | } | |
1840 | #endif | |
1841 | ||
9411b1d4 BF |
1842 | /* |
1843 | * Bump the seqid on cstate->replay_owner, and clear replay_owner if it | |
1844 | * won't be used for replay. | |
1845 | */ | |
1846 | void nfsd4_bump_seqid(struct nfsd4_compound_state *cstate, __be32 nfserr) | |
1847 | { | |
1848 | struct nfs4_stateowner *so = cstate->replay_owner; | |
1849 | ||
1850 | if (nfserr == nfserr_replay_me) | |
1851 | return; | |
1852 | ||
1853 | if (!seqid_mutating_err(ntohl(nfserr))) { | |
58fb12e6 | 1854 | nfsd4_cstate_clear_replay(cstate); |
9411b1d4 BF |
1855 | return; |
1856 | } | |
1857 | if (!so) | |
1858 | return; | |
1859 | if (so->so_is_open_owner) | |
1860 | release_last_closed_stateid(openowner(so)); | |
1861 | so->so_seqid++; | |
1862 | return; | |
1863 | } | |
5282fd72 | 1864 | |
ec6b5d7b AA |
1865 | static void |
1866 | gen_sessionid(struct nfsd4_session *ses) | |
1867 | { | |
1868 | struct nfs4_client *clp = ses->se_client; | |
1869 | struct nfsd4_sessionid *sid; | |
1870 | ||
1871 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
1872 | sid->clientid = clp->cl_clientid; | |
1873 | sid->sequence = current_sessionid++; | |
1874 | sid->reserved = 0; | |
1875 | } | |
1876 | ||
1877 | /* | |
a649637c AA |
1878 | * The protocol defines ca_maxresponssize_cached to include the size of |
1879 | * the rpc header, but all we need to cache is the data starting after | |
1880 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
1881 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
1882 | * value that is the number of bytes in our cache plus a few additional | |
1883 | * bytes. In order to stay on the safe side, and not promise more than | |
1884 | * we can cache, those additional bytes must be the minimum possible: 24 | |
1885 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
1886 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
1887 | * for the SEQUENCE op response: | |
1888 | */ | |
1889 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
1890 | ||
557ce264 AA |
1891 | static void |
1892 | free_session_slots(struct nfsd4_session *ses) | |
1893 | { | |
1894 | int i; | |
1895 | ||
53da6a53 BF |
1896 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) { |
1897 | free_svc_cred(&ses->se_slots[i]->sl_cred); | |
557ce264 | 1898 | kfree(ses->se_slots[i]); |
53da6a53 | 1899 | } |
557ce264 AA |
1900 | } |
1901 | ||
a649637c | 1902 | /* |
efe0cb6d BF |
1903 | * We don't actually need to cache the rpc and session headers, so we |
1904 | * can allocate a little less for each slot: | |
1905 | */ | |
55c760cf | 1906 | static inline u32 slot_bytes(struct nfsd4_channel_attrs *ca) |
efe0cb6d | 1907 | { |
55c760cf | 1908 | u32 size; |
efe0cb6d | 1909 | |
55c760cf BF |
1910 | if (ca->maxresp_cached < NFSD_MIN_HDR_SEQ_SZ) |
1911 | size = 0; | |
1912 | else | |
1913 | size = ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
1914 | return size + sizeof(struct nfsd4_slot); | |
5b6feee9 | 1915 | } |
ec6b5d7b | 1916 | |
5b6feee9 BF |
1917 | /* |
1918 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c | 1919 | * re-negotiate active sessions and reduce their slot usage to make |
42b2aa86 | 1920 | * room for new connections. For now we just fail the create session. |
ec6b5d7b | 1921 | */ |
2030ca56 | 1922 | static u32 nfsd4_get_drc_mem(struct nfsd4_channel_attrs *ca, struct nfsd_net *nn) |
ec6b5d7b | 1923 | { |
55c760cf BF |
1924 | u32 slotsize = slot_bytes(ca); |
1925 | u32 num = ca->maxreqs; | |
c54f24e3 | 1926 | unsigned long avail, total_avail; |
2030ca56 | 1927 | unsigned int scale_factor; |
ec6b5d7b | 1928 | |
5b6feee9 | 1929 | spin_lock(&nfsd_drc_lock); |
7f49fd5d N |
1930 | if (nfsd_drc_max_mem > nfsd_drc_mem_used) |
1931 | total_avail = nfsd_drc_max_mem - nfsd_drc_mem_used; | |
1932 | else | |
1933 | /* We have handed out more space than we chose in | |
1934 | * set_max_drc() to allow. That isn't really a | |
1935 | * problem as long as that doesn't make us think we | |
1936 | * have lots more due to integer overflow. | |
1937 | */ | |
1938 | total_avail = 0; | |
c54f24e3 | 1939 | avail = min((unsigned long)NFSD_MAX_MEM_PER_SESSION, total_avail); |
de766e57 | 1940 | /* |
2030ca56 | 1941 | * Never use more than a fraction of the remaining memory, |
7f49fd5d | 1942 | * unless it's the only way to give this client a slot. |
2030ca56 N |
1943 | * The chosen fraction is either 1/8 or 1/number of threads, |
1944 | * whichever is smaller. This ensures there are adequate | |
1945 | * slots to support multiple clients per thread. | |
7f49fd5d N |
1946 | * Give the client one slot even if that would require |
1947 | * over-allocation--it is better than failure. | |
de766e57 | 1948 | */ |
2030ca56 N |
1949 | scale_factor = max_t(unsigned int, 8, nn->nfsd_serv->sv_nrthreads); |
1950 | ||
1951 | avail = clamp_t(unsigned long, avail, slotsize, | |
1952 | total_avail/scale_factor); | |
5b6feee9 | 1953 | num = min_t(int, num, avail / slotsize); |
7f49fd5d | 1954 | num = max_t(int, num, 1); |
5b6feee9 BF |
1955 | nfsd_drc_mem_used += num * slotsize; |
1956 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 1957 | |
5b6feee9 BF |
1958 | return num; |
1959 | } | |
ec6b5d7b | 1960 | |
55c760cf | 1961 | static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs *ca) |
5b6feee9 | 1962 | { |
55c760cf BF |
1963 | int slotsize = slot_bytes(ca); |
1964 | ||
4bd9b0f4 | 1965 | spin_lock(&nfsd_drc_lock); |
55c760cf | 1966 | nfsd_drc_mem_used -= slotsize * ca->maxreqs; |
4bd9b0f4 | 1967 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 1968 | } |
ec6b5d7b | 1969 | |
60810e54 KM |
1970 | static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fattrs, |
1971 | struct nfsd4_channel_attrs *battrs) | |
5b6feee9 | 1972 | { |
60810e54 KM |
1973 | int numslots = fattrs->maxreqs; |
1974 | int slotsize = slot_bytes(fattrs); | |
5b6feee9 | 1975 | struct nfsd4_session *new; |
85a0d0c9 | 1976 | int i; |
a649637c | 1977 | |
85a0d0c9 XJ |
1978 | BUILD_BUG_ON(struct_size(new, se_slots, NFSD_MAX_SLOTS_PER_SESSION) |
1979 | > PAGE_SIZE); | |
ec6b5d7b | 1980 | |
85a0d0c9 | 1981 | new = kzalloc(struct_size(new, se_slots, numslots), GFP_KERNEL); |
5b6feee9 BF |
1982 | if (!new) |
1983 | return NULL; | |
557ce264 | 1984 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 | 1985 | for (i = 0; i < numslots; i++) { |
55c760cf | 1986 | new->se_slots[i] = kzalloc(slotsize, GFP_KERNEL); |
5b6feee9 | 1987 | if (!new->se_slots[i]) |
557ce264 | 1988 | goto out_free; |
557ce264 | 1989 | } |
60810e54 KM |
1990 | |
1991 | memcpy(&new->se_fchannel, fattrs, sizeof(struct nfsd4_channel_attrs)); | |
1992 | memcpy(&new->se_bchannel, battrs, sizeof(struct nfsd4_channel_attrs)); | |
1993 | ||
5b6feee9 BF |
1994 | return new; |
1995 | out_free: | |
1996 | while (i--) | |
1997 | kfree(new->se_slots[i]); | |
1998 | kfree(new); | |
1999 | return NULL; | |
ec6b5d7b AA |
2000 | } |
2001 | ||
19cf5c02 BF |
2002 | static void free_conn(struct nfsd4_conn *c) |
2003 | { | |
2004 | svc_xprt_put(c->cn_xprt); | |
2005 | kfree(c); | |
2006 | } | |
ec6b5d7b | 2007 | |
19cf5c02 BF |
2008 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
2009 | { | |
2010 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
2011 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 2012 | |
806d65b6 CL |
2013 | trace_nfsd_cb_lost(clp); |
2014 | ||
19cf5c02 BF |
2015 | spin_lock(&clp->cl_lock); |
2016 | if (!list_empty(&c->cn_persession)) { | |
2017 | list_del(&c->cn_persession); | |
2018 | free_conn(c); | |
2019 | } | |
eea49806 | 2020 | nfsd4_probe_callback(clp); |
2e4b7239 | 2021 | spin_unlock(&clp->cl_lock); |
19cf5c02 | 2022 | } |
ec6b5d7b | 2023 | |
d29c374c | 2024 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 2025 | { |
c7662518 | 2026 | struct nfsd4_conn *conn; |
ec6b5d7b | 2027 | |
c7662518 BF |
2028 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
2029 | if (!conn) | |
db90681d | 2030 | return NULL; |
c7662518 BF |
2031 | svc_xprt_get(rqstp->rq_xprt); |
2032 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 2033 | conn->cn_flags = flags; |
db90681d BF |
2034 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
2035 | return conn; | |
2036 | } | |
a649637c | 2037 | |
328ead28 BF |
2038 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
2039 | { | |
2040 | conn->cn_session = ses; | |
2041 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
2042 | } |
2043 | ||
db90681d | 2044 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 2045 | { |
db90681d | 2046 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 2047 | |
c7662518 | 2048 | spin_lock(&clp->cl_lock); |
328ead28 | 2049 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 2050 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
2051 | } |
2052 | ||
21b75b01 | 2053 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 2054 | { |
19cf5c02 | 2055 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 2056 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
2057 | } |
2058 | ||
e1ff371f | 2059 | static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses) |
ec6b5d7b | 2060 | { |
21b75b01 | 2061 | int ret; |
ec6b5d7b | 2062 | |
db90681d | 2063 | nfsd4_hash_conn(conn, ses); |
21b75b01 BF |
2064 | ret = nfsd4_register_conn(conn); |
2065 | if (ret) | |
2066 | /* oops; xprt is already down: */ | |
2067 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
57a37144 BF |
2068 | /* We may have gained or lost a callback channel: */ |
2069 | nfsd4_probe_callback_sync(ses->se_client); | |
c7662518 | 2070 | } |
ec6b5d7b | 2071 | |
e1ff371f | 2072 | static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses) |
1d1bc8f2 BF |
2073 | { |
2074 | u32 dir = NFS4_CDFC4_FORE; | |
2075 | ||
e1ff371f | 2076 | if (cses->flags & SESSION4_BACK_CHAN) |
1d1bc8f2 | 2077 | dir |= NFS4_CDFC4_BACK; |
e1ff371f | 2078 | return alloc_conn(rqstp, dir); |
1d1bc8f2 BF |
2079 | } |
2080 | ||
2081 | /* must be called under client_lock */ | |
19cf5c02 | 2082 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 2083 | { |
19cf5c02 BF |
2084 | struct nfs4_client *clp = s->se_client; |
2085 | struct nfsd4_conn *c; | |
ec6b5d7b | 2086 | |
19cf5c02 BF |
2087 | spin_lock(&clp->cl_lock); |
2088 | while (!list_empty(&s->se_conns)) { | |
2089 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
2090 | list_del_init(&c->cn_persession); | |
2091 | spin_unlock(&clp->cl_lock); | |
557ce264 | 2092 | |
19cf5c02 BF |
2093 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
2094 | free_conn(c); | |
ec6b5d7b | 2095 | |
19cf5c02 BF |
2096 | spin_lock(&clp->cl_lock); |
2097 | } | |
2098 | spin_unlock(&clp->cl_lock); | |
c7662518 | 2099 | } |
ec6b5d7b | 2100 | |
1377b69e BF |
2101 | static void __free_session(struct nfsd4_session *ses) |
2102 | { | |
1377b69e BF |
2103 | free_session_slots(ses); |
2104 | kfree(ses); | |
2105 | } | |
2106 | ||
66b2b9b2 | 2107 | static void free_session(struct nfsd4_session *ses) |
c7662518 | 2108 | { |
19cf5c02 | 2109 | nfsd4_del_conns(ses); |
55c760cf | 2110 | nfsd4_put_drc_mem(&ses->se_fchannel); |
1377b69e | 2111 | __free_session(ses); |
c7662518 BF |
2112 | } |
2113 | ||
135ae827 | 2114 | static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
a827bcb2 | 2115 | { |
a827bcb2 | 2116 | int idx; |
1872de0e | 2117 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
a827bcb2 | 2118 | |
ec6b5d7b AA |
2119 | new->se_client = clp; |
2120 | gen_sessionid(new); | |
ec6b5d7b | 2121 | |
c7662518 BF |
2122 | INIT_LIST_HEAD(&new->se_conns); |
2123 | ||
ac7c46f2 | 2124 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 2125 | new->se_flags = cses->flags; |
8b5ce5cd | 2126 | new->se_cb_prog = cses->callback_prog; |
c6bb3ca2 | 2127 | new->se_cb_sec = cses->cb_sec; |
66b2b9b2 | 2128 | atomic_set(&new->se_ref, 0); |
5b6feee9 | 2129 | idx = hash_sessionid(&new->se_sessionid); |
1872de0e | 2130 | list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]); |
4c649378 | 2131 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 2132 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 2133 | spin_unlock(&clp->cl_lock); |
60810e54 | 2134 | |
b0d2e42c | 2135 | { |
edd76786 | 2136 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
2137 | /* |
2138 | * This is a little silly; with sessions there's no real | |
2139 | * use for the callback address. Use the peer address | |
2140 | * as a reasonable default for now, but consider fixing | |
2141 | * the rpc client not to require an address in the | |
2142 | * future: | |
2143 | */ | |
edd76786 BF |
2144 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
2145 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 2146 | } |
ec6b5d7b AA |
2147 | } |
2148 | ||
9089f1b4 | 2149 | /* caller must hold client_lock */ |
5282fd72 | 2150 | static struct nfsd4_session * |
d4e19e70 | 2151 | __find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net) |
5282fd72 ME |
2152 | { |
2153 | struct nfsd4_session *elem; | |
2154 | int idx; | |
1872de0e | 2155 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
5282fd72 | 2156 | |
0a880a28 TM |
2157 | lockdep_assert_held(&nn->client_lock); |
2158 | ||
5282fd72 ME |
2159 | dump_sessionid(__func__, sessionid); |
2160 | idx = hash_sessionid(sessionid); | |
5282fd72 | 2161 | /* Search in the appropriate list */ |
1872de0e | 2162 | list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) { |
5282fd72 ME |
2163 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
2164 | NFS4_MAX_SESSIONID_LEN)) { | |
2165 | return elem; | |
2166 | } | |
2167 | } | |
2168 | ||
2169 | dprintk("%s: session not found\n", __func__); | |
2170 | return NULL; | |
2171 | } | |
2172 | ||
d4e19e70 TM |
2173 | static struct nfsd4_session * |
2174 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net, | |
2175 | __be32 *ret) | |
2176 | { | |
2177 | struct nfsd4_session *session; | |
2178 | __be32 status = nfserr_badsession; | |
2179 | ||
2180 | session = __find_in_sessionid_hashtbl(sessionid, net); | |
2181 | if (!session) | |
2182 | goto out; | |
2183 | status = nfsd4_get_session_locked(session); | |
2184 | if (status) | |
2185 | session = NULL; | |
2186 | out: | |
2187 | *ret = status; | |
2188 | return session; | |
2189 | } | |
2190 | ||
9089f1b4 | 2191 | /* caller must hold client_lock */ |
7116ed6b | 2192 | static void |
5282fd72 | 2193 | unhash_session(struct nfsd4_session *ses) |
7116ed6b | 2194 | { |
0a880a28 TM |
2195 | struct nfs4_client *clp = ses->se_client; |
2196 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
2197 | ||
2198 | lockdep_assert_held(&nn->client_lock); | |
2199 | ||
7116ed6b | 2200 | list_del(&ses->se_hash); |
4c649378 | 2201 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 2202 | list_del(&ses->se_perclnt); |
4c649378 | 2203 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
2204 | } |
2205 | ||
1da177e4 LT |
2206 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
2207 | static int | |
2c142baa | 2208 | STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn) |
1da177e4 | 2209 | { |
bbc7f33a BF |
2210 | /* |
2211 | * We're assuming the clid was not given out from a boot | |
2212 | * precisely 2^32 (about 136 years) before this one. That seems | |
2213 | * a safe assumption: | |
2214 | */ | |
2215 | if (clid->cl_boot == (u32)nn->boot_time) | |
1da177e4 | 2216 | return 0; |
dd5e3fbc | 2217 | trace_nfsd_clid_stale(clid); |
1da177e4 LT |
2218 | return 1; |
2219 | } | |
2220 | ||
2221 | /* | |
2222 | * XXX Should we use a slab cache ? | |
2223 | * This type of memory management is somewhat inefficient, but we use it | |
2224 | * anyway since SETCLIENTID is not a common operation. | |
2225 | */ | |
0926c395 DN |
2226 | static struct nfs4_client *alloc_client(struct xdr_netobj name, |
2227 | struct nfsd_net *nn) | |
1da177e4 LT |
2228 | { |
2229 | struct nfs4_client *clp; | |
d4f0489f | 2230 | int i; |
1da177e4 | 2231 | |
4271c2c0 DN |
2232 | if (atomic_read(&nn->nfs4_client_count) >= nn->nfs4_max_clients) { |
2233 | mod_delayed_work(laundry_wq, &nn->laundromat_work, 0); | |
2234 | return NULL; | |
2235 | } | |
9258a2d5 | 2236 | clp = kmem_cache_zalloc(client_slab, GFP_KERNEL); |
35bba9a3 BF |
2237 | if (clp == NULL) |
2238 | return NULL; | |
6f4859b8 | 2239 | xdr_netobj_dup(&clp->cl_name, &name, GFP_KERNEL); |
d4f0489f TM |
2240 | if (clp->cl_name.data == NULL) |
2241 | goto err_no_name; | |
6da2ec56 KC |
2242 | clp->cl_ownerstr_hashtbl = kmalloc_array(OWNER_HASH_SIZE, |
2243 | sizeof(struct list_head), | |
2244 | GFP_KERNEL); | |
d4f0489f TM |
2245 | if (!clp->cl_ownerstr_hashtbl) |
2246 | goto err_no_hashtbl; | |
2247 | for (i = 0; i < OWNER_HASH_SIZE; i++) | |
2248 | INIT_LIST_HEAD(&clp->cl_ownerstr_hashtbl[i]); | |
5694c93e TM |
2249 | INIT_LIST_HEAD(&clp->cl_sessions); |
2250 | idr_init(&clp->cl_stateids); | |
14ed14cc | 2251 | atomic_set(&clp->cl_rpc_users, 0); |
5694c93e | 2252 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; |
66af2579 | 2253 | clp->cl_state = NFSD4_ACTIVE; |
0926c395 | 2254 | atomic_inc(&nn->nfs4_client_count); |
66af2579 | 2255 | atomic_set(&clp->cl_delegs_in_recall, 0); |
5694c93e TM |
2256 | INIT_LIST_HEAD(&clp->cl_idhash); |
2257 | INIT_LIST_HEAD(&clp->cl_openowners); | |
2258 | INIT_LIST_HEAD(&clp->cl_delegations); | |
2259 | INIT_LIST_HEAD(&clp->cl_lru); | |
5694c93e | 2260 | INIT_LIST_HEAD(&clp->cl_revoked); |
9cf514cc CH |
2261 | #ifdef CONFIG_NFSD_PNFS |
2262 | INIT_LIST_HEAD(&clp->cl_lo_states); | |
2263 | #endif | |
e0639dc5 OK |
2264 | INIT_LIST_HEAD(&clp->async_copies); |
2265 | spin_lock_init(&clp->async_lock); | |
5694c93e TM |
2266 | spin_lock_init(&clp->cl_lock); |
2267 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1da177e4 | 2268 | return clp; |
d4f0489f TM |
2269 | err_no_hashtbl: |
2270 | kfree(clp->cl_name.data); | |
2271 | err_no_name: | |
9258a2d5 | 2272 | kmem_cache_free(client_slab, clp); |
d4f0489f | 2273 | return NULL; |
1da177e4 LT |
2274 | } |
2275 | ||
59f8e91b BF |
2276 | static void __free_client(struct kref *k) |
2277 | { | |
e8a79fb1 BF |
2278 | struct nfsdfs_client *c = container_of(k, struct nfsdfs_client, cl_ref); |
2279 | struct nfs4_client *clp = container_of(c, struct nfs4_client, cl_nfsdfs); | |
59f8e91b BF |
2280 | |
2281 | free_svc_cred(&clp->cl_cred); | |
2282 | kfree(clp->cl_ownerstr_hashtbl); | |
2283 | kfree(clp->cl_name.data); | |
79123444 BF |
2284 | kfree(clp->cl_nii_domain.data); |
2285 | kfree(clp->cl_nii_name.data); | |
59f8e91b | 2286 | idr_destroy(&clp->cl_stateids); |
44df6f43 | 2287 | kfree(clp->cl_ra); |
59f8e91b BF |
2288 | kmem_cache_free(client_slab, clp); |
2289 | } | |
2290 | ||
297e57a2 | 2291 | static void drop_client(struct nfs4_client *clp) |
59f8e91b | 2292 | { |
e8a79fb1 | 2293 | kref_put(&clp->cl_nfsdfs.cl_ref, __free_client); |
59f8e91b BF |
2294 | } |
2295 | ||
4dd86e15 | 2296 | static void |
1da177e4 LT |
2297 | free_client(struct nfs4_client *clp) |
2298 | { | |
792c95dd BF |
2299 | while (!list_empty(&clp->cl_sessions)) { |
2300 | struct nfsd4_session *ses; | |
2301 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
2302 | se_perclnt); | |
2303 | list_del(&ses->se_perclnt); | |
66b2b9b2 BF |
2304 | WARN_ON_ONCE(atomic_read(&ses->se_ref)); |
2305 | free_session(ses); | |
792c95dd | 2306 | } |
4cb57e30 | 2307 | rpc_destroy_wait_queue(&clp->cl_cb_waitq); |
89c905be | 2308 | if (clp->cl_nfsd_dentry) { |
e8a79fb1 | 2309 | nfsd_client_rmdir(clp->cl_nfsd_dentry); |
89c905be BF |
2310 | clp->cl_nfsd_dentry = NULL; |
2311 | wake_up_all(&expiry_wq); | |
2312 | } | |
59f8e91b | 2313 | drop_client(clp); |
1da177e4 LT |
2314 | } |
2315 | ||
84d38ac9 | 2316 | /* must be called under the client_lock */ |
4beb345b | 2317 | static void |
84d38ac9 BH |
2318 | unhash_client_locked(struct nfs4_client *clp) |
2319 | { | |
4beb345b | 2320 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
792c95dd BF |
2321 | struct nfsd4_session *ses; |
2322 | ||
0a880a28 TM |
2323 | lockdep_assert_held(&nn->client_lock); |
2324 | ||
4beb345b TM |
2325 | /* Mark the client as expired! */ |
2326 | clp->cl_time = 0; | |
2327 | /* Make it invisible */ | |
2328 | if (!list_empty(&clp->cl_idhash)) { | |
2329 | list_del_init(&clp->cl_idhash); | |
2330 | if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) | |
2331 | rb_erase(&clp->cl_namenode, &nn->conf_name_tree); | |
2332 | else | |
2333 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); | |
2334 | } | |
2335 | list_del_init(&clp->cl_lru); | |
4c649378 | 2336 | spin_lock(&clp->cl_lock); |
792c95dd BF |
2337 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
2338 | list_del_init(&ses->se_hash); | |
4c649378 | 2339 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
2340 | } |
2341 | ||
1da177e4 | 2342 | static void |
4beb345b TM |
2343 | unhash_client(struct nfs4_client *clp) |
2344 | { | |
2345 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
2346 | ||
2347 | spin_lock(&nn->client_lock); | |
2348 | unhash_client_locked(clp); | |
2349 | spin_unlock(&nn->client_lock); | |
2350 | } | |
2351 | ||
97403d95 JL |
2352 | static __be32 mark_client_expired_locked(struct nfs4_client *clp) |
2353 | { | |
14ed14cc | 2354 | if (atomic_read(&clp->cl_rpc_users)) |
97403d95 JL |
2355 | return nfserr_jukebox; |
2356 | unhash_client_locked(clp); | |
2357 | return nfs_ok; | |
2358 | } | |
2359 | ||
4beb345b TM |
2360 | static void |
2361 | __destroy_client(struct nfs4_client *clp) | |
1da177e4 | 2362 | { |
0926c395 | 2363 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
68ef3bc3 | 2364 | int i; |
fe0750e5 | 2365 | struct nfs4_openowner *oo; |
1da177e4 | 2366 | struct nfs4_delegation *dp; |
1da177e4 LT |
2367 | struct list_head reaplist; |
2368 | ||
1da177e4 | 2369 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 2370 | spin_lock(&state_lock); |
ea1da636 N |
2371 | while (!list_empty(&clp->cl_delegations)) { |
2372 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
3f29cc82 | 2373 | unhash_delegation_locked(dp, SC_STATUS_CLOSED); |
42690676 | 2374 | list_add(&dp->dl_recall_lru, &reaplist); |
1da177e4 | 2375 | } |
cdc97505 | 2376 | spin_unlock(&state_lock); |
1da177e4 LT |
2377 | while (!list_empty(&reaplist)) { |
2378 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
42690676 | 2379 | list_del_init(&dp->dl_recall_lru); |
0af6e690 | 2380 | destroy_unhashed_deleg(dp); |
1da177e4 | 2381 | } |
2d4a532d | 2382 | while (!list_empty(&clp->cl_revoked)) { |
c876486b | 2383 | dp = list_entry(clp->cl_revoked.next, struct nfs4_delegation, dl_recall_lru); |
2d4a532d | 2384 | list_del_init(&dp->dl_recall_lru); |
6011695d | 2385 | nfs4_put_stid(&dp->dl_stid); |
956c4fee | 2386 | } |
ea1da636 | 2387 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 | 2388 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
b5971afa | 2389 | nfs4_get_stateowner(&oo->oo_owner); |
fe0750e5 | 2390 | release_openowner(oo); |
1da177e4 | 2391 | } |
68ef3bc3 JL |
2392 | for (i = 0; i < OWNER_HASH_SIZE; i++) { |
2393 | struct nfs4_stateowner *so, *tmp; | |
2394 | ||
2395 | list_for_each_entry_safe(so, tmp, &clp->cl_ownerstr_hashtbl[i], | |
2396 | so_strhash) { | |
2397 | /* Should be no openowners at this point */ | |
2398 | WARN_ON_ONCE(so->so_is_open_owner); | |
2399 | remove_blocked_locks(lockowner(so)); | |
2400 | } | |
2401 | } | |
9cf514cc | 2402 | nfsd4_return_all_client_layouts(clp); |
e0639dc5 | 2403 | nfsd4_shutdown_copy(clp); |
6ff8da08 | 2404 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
2405 | if (clp->cl_cb_conn.cb_xprt) |
2406 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
0926c395 | 2407 | atomic_add_unless(&nn->nfs4_client_count, -1, 0); |
3a4ea23d | 2408 | nfsd4_dec_courtesy_client_count(nn, clp); |
221a6876 | 2409 | free_client(clp); |
89c905be | 2410 | wake_up_all(&expiry_wq); |
1da177e4 LT |
2411 | } |
2412 | ||
4beb345b TM |
2413 | static void |
2414 | destroy_client(struct nfs4_client *clp) | |
2415 | { | |
2416 | unhash_client(clp); | |
2417 | __destroy_client(clp); | |
2418 | } | |
2419 | ||
362063a5 SM |
2420 | static void inc_reclaim_complete(struct nfs4_client *clp) |
2421 | { | |
2422 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
2423 | ||
2424 | if (!nn->track_reclaim_completes) | |
2425 | return; | |
2426 | if (!nfsd4_find_reclaim_client(clp->cl_name, nn)) | |
2427 | return; | |
2428 | if (atomic_inc_return(&nn->nr_reclaim_complete) == | |
2429 | nn->reclaim_str_hashtbl_size) { | |
2430 | printk(KERN_INFO "NFSD: all clients done reclaiming, ending NFSv4 grace period (net %x)\n", | |
2431 | clp->net->ns.inum); | |
2432 | nfsd4_end_grace(nn); | |
2433 | } | |
2434 | } | |
2435 | ||
0d22f68f BF |
2436 | static void expire_client(struct nfs4_client *clp) |
2437 | { | |
4beb345b | 2438 | unhash_client(clp); |
0d22f68f | 2439 | nfsd4_client_record_remove(clp); |
4beb345b | 2440 | __destroy_client(clp); |
0d22f68f BF |
2441 | } |
2442 | ||
35bba9a3 BF |
2443 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
2444 | { | |
2445 | memcpy(target->cl_verifier.data, source->data, | |
2446 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
2447 | } |
2448 | ||
35bba9a3 BF |
2449 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
2450 | { | |
1da177e4 LT |
2451 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
2452 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
2453 | } | |
2454 | ||
50043859 BF |
2455 | static int copy_cred(struct svc_cred *target, struct svc_cred *source) |
2456 | { | |
2f10fdcb N |
2457 | target->cr_principal = kstrdup(source->cr_principal, GFP_KERNEL); |
2458 | target->cr_raw_principal = kstrdup(source->cr_raw_principal, | |
2459 | GFP_KERNEL); | |
9abdda5d CL |
2460 | target->cr_targ_princ = kstrdup(source->cr_targ_princ, GFP_KERNEL); |
2461 | if ((source->cr_principal && !target->cr_principal) || | |
2462 | (source->cr_raw_principal && !target->cr_raw_principal) || | |
2463 | (source->cr_targ_princ && !target->cr_targ_princ)) | |
2f10fdcb | 2464 | return -ENOMEM; |
50043859 | 2465 | |
d5497fc6 | 2466 | target->cr_flavor = source->cr_flavor; |
1da177e4 LT |
2467 | target->cr_uid = source->cr_uid; |
2468 | target->cr_gid = source->cr_gid; | |
2469 | target->cr_group_info = source->cr_group_info; | |
2470 | get_group_info(target->cr_group_info); | |
0dc1531a BF |
2471 | target->cr_gss_mech = source->cr_gss_mech; |
2472 | if (source->cr_gss_mech) | |
2473 | gss_mech_get(source->cr_gss_mech); | |
03a4e1f6 | 2474 | return 0; |
1da177e4 LT |
2475 | } |
2476 | ||
ef17af2a | 2477 | static int |
ac55fdc4 JL |
2478 | compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2) |
2479 | { | |
ef17af2a RV |
2480 | if (o1->len < o2->len) |
2481 | return -1; | |
2482 | if (o1->len > o2->len) | |
2483 | return 1; | |
2484 | return memcmp(o1->data, o2->data, o1->len); | |
ac55fdc4 JL |
2485 | } |
2486 | ||
1da177e4 | 2487 | static int |
599e0a22 BF |
2488 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
2489 | { | |
2490 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
2491 | } |
2492 | ||
2493 | static int | |
599e0a22 BF |
2494 | same_clid(clientid_t *cl1, clientid_t *cl2) |
2495 | { | |
2496 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
2497 | } |
2498 | ||
8fbba96e BF |
2499 | static bool groups_equal(struct group_info *g1, struct group_info *g2) |
2500 | { | |
2501 | int i; | |
2502 | ||
2503 | if (g1->ngroups != g2->ngroups) | |
2504 | return false; | |
2505 | for (i=0; i<g1->ngroups; i++) | |
81243eac | 2506 | if (!gid_eq(g1->gid[i], g2->gid[i])) |
8fbba96e BF |
2507 | return false; |
2508 | return true; | |
2509 | } | |
2510 | ||
68eb3508 BF |
2511 | /* |
2512 | * RFC 3530 language requires clid_inuse be returned when the | |
2513 | * "principal" associated with a requests differs from that previously | |
2514 | * used. We use uid, gid's, and gss principal string as our best | |
2515 | * approximation. We also don't want to allow non-gss use of a client | |
2516 | * established using gss: in theory cr_principal should catch that | |
2517 | * change, but in practice cr_principal can be null even in the gss case | |
2518 | * since gssd doesn't always pass down a principal string. | |
2519 | */ | |
2520 | static bool is_gss_cred(struct svc_cred *cr) | |
2521 | { | |
2522 | /* Is cr_flavor one of the gss "pseudoflavors"?: */ | |
2523 | return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR); | |
2524 | } | |
2525 | ||
2526 | ||
5559b50a | 2527 | static bool |
599e0a22 BF |
2528 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
2529 | { | |
68eb3508 | 2530 | if ((is_gss_cred(cr1) != is_gss_cred(cr2)) |
6fab8779 EB |
2531 | || (!uid_eq(cr1->cr_uid, cr2->cr_uid)) |
2532 | || (!gid_eq(cr1->cr_gid, cr2->cr_gid)) | |
8fbba96e BF |
2533 | || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) |
2534 | return false; | |
9abdda5d | 2535 | /* XXX: check that cr_targ_princ fields match ? */ |
8fbba96e BF |
2536 | if (cr1->cr_principal == cr2->cr_principal) |
2537 | return true; | |
2538 | if (!cr1->cr_principal || !cr2->cr_principal) | |
2539 | return false; | |
5559b50a | 2540 | return 0 == strcmp(cr1->cr_principal, cr2->cr_principal); |
1da177e4 LT |
2541 | } |
2542 | ||
57266a6e BF |
2543 | static bool svc_rqst_integrity_protected(struct svc_rqst *rqstp) |
2544 | { | |
2545 | struct svc_cred *cr = &rqstp->rq_cred; | |
2546 | u32 service; | |
2547 | ||
c4720591 BF |
2548 | if (!cr->cr_gss_mech) |
2549 | return false; | |
57266a6e BF |
2550 | service = gss_pseudoflavor_to_service(cr->cr_gss_mech, cr->cr_flavor); |
2551 | return service == RPC_GSS_SVC_INTEGRITY || | |
2552 | service == RPC_GSS_SVC_PRIVACY; | |
2553 | } | |
2554 | ||
dedeb13f | 2555 | bool nfsd4_mach_creds_match(struct nfs4_client *cl, struct svc_rqst *rqstp) |
57266a6e BF |
2556 | { |
2557 | struct svc_cred *cr = &rqstp->rq_cred; | |
2558 | ||
2559 | if (!cl->cl_mach_cred) | |
2560 | return true; | |
2561 | if (cl->cl_cred.cr_gss_mech != cr->cr_gss_mech) | |
2562 | return false; | |
2563 | if (!svc_rqst_integrity_protected(rqstp)) | |
2564 | return false; | |
414ca017 BF |
2565 | if (cl->cl_cred.cr_raw_principal) |
2566 | return 0 == strcmp(cl->cl_cred.cr_raw_principal, | |
2567 | cr->cr_raw_principal); | |
57266a6e BF |
2568 | if (!cr->cr_principal) |
2569 | return false; | |
2570 | return 0 == strcmp(cl->cl_cred.cr_principal, cr->cr_principal); | |
2571 | } | |
2572 | ||
294ac32e | 2573 | static void gen_confirm(struct nfs4_client *clp, struct nfsd_net *nn) |
deda2faa | 2574 | { |
ab4684d1 | 2575 | __be32 verf[2]; |
1da177e4 | 2576 | |
f419992c JL |
2577 | /* |
2578 | * This is opaque to client, so no need to byte-swap. Use | |
2579 | * __force to keep sparse happy | |
2580 | */ | |
9104ae49 | 2581 | verf[0] = (__force __be32)(u32)ktime_get_real_seconds(); |
19311aa8 | 2582 | verf[1] = (__force __be32)nn->clverifier_counter++; |
ab4684d1 | 2583 | memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); |
1da177e4 LT |
2584 | } |
2585 | ||
294ac32e JL |
2586 | static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn) |
2587 | { | |
9cc76801 | 2588 | clp->cl_clientid.cl_boot = (u32)nn->boot_time; |
294ac32e JL |
2589 | clp->cl_clientid.cl_id = nn->clientid_counter++; |
2590 | gen_confirm(clp, nn); | |
2591 | } | |
2592 | ||
4770d722 JL |
2593 | static struct nfs4_stid * |
2594 | find_stateid_locked(struct nfs4_client *cl, stateid_t *t) | |
4581d140 | 2595 | { |
3abdb607 BF |
2596 | struct nfs4_stid *ret; |
2597 | ||
2598 | ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id); | |
2599 | if (!ret || !ret->sc_type) | |
2600 | return NULL; | |
2601 | return ret; | |
4d71ab87 BF |
2602 | } |
2603 | ||
4770d722 | 2604 | static struct nfs4_stid * |
3f29cc82 N |
2605 | find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, |
2606 | unsigned short typemask, unsigned short ok_states) | |
f459e453 BF |
2607 | { |
2608 | struct nfs4_stid *s; | |
4d71ab87 | 2609 | |
4770d722 JL |
2610 | spin_lock(&cl->cl_lock); |
2611 | s = find_stateid_locked(cl, t); | |
2d3f9668 | 2612 | if (s != NULL) { |
3f29cc82 N |
2613 | if ((s->sc_status & ~ok_states) == 0 && |
2614 | (typemask & s->sc_type)) | |
a15dfcd5 | 2615 | refcount_inc(&s->sc_count); |
2d3f9668 TM |
2616 | else |
2617 | s = NULL; | |
2618 | } | |
4770d722 JL |
2619 | spin_unlock(&cl->cl_lock); |
2620 | return s; | |
4581d140 BF |
2621 | } |
2622 | ||
a204f25e BF |
2623 | static struct nfs4_client *get_nfsdfs_clp(struct inode *inode) |
2624 | { | |
2625 | struct nfsdfs_client *nc; | |
2626 | nc = get_nfsdfs_client(inode); | |
2627 | if (!nc) | |
2628 | return NULL; | |
2629 | return container_of(nc, struct nfs4_client, cl_nfsdfs); | |
2630 | } | |
2631 | ||
169319f1 BF |
2632 | static void seq_quote_mem(struct seq_file *m, char *data, int len) |
2633 | { | |
39e1be64 | 2634 | seq_puts(m, "\""); |
c0546391 | 2635 | seq_escape_mem(m, data, len, ESCAPE_HEX | ESCAPE_NAP | ESCAPE_APPEND, "\"\\"); |
39e1be64 | 2636 | seq_puts(m, "\""); |
169319f1 BF |
2637 | } |
2638 | ||
3518c866 DW |
2639 | static const char *cb_state2str(int state) |
2640 | { | |
2641 | switch (state) { | |
2642 | case NFSD4_CB_UP: | |
2643 | return "UP"; | |
2644 | case NFSD4_CB_UNKNOWN: | |
2645 | return "UNKNOWN"; | |
2646 | case NFSD4_CB_DOWN: | |
2647 | return "DOWN"; | |
2648 | case NFSD4_CB_FAULT: | |
2649 | return "FAULT"; | |
2650 | } | |
2651 | return "UNDEFINED"; | |
2652 | } | |
2653 | ||
97ad4031 BF |
2654 | static int client_info_show(struct seq_file *m, void *v) |
2655 | { | |
1d7f6b30 | 2656 | struct inode *inode = file_inode(m->file); |
97ad4031 BF |
2657 | struct nfs4_client *clp; |
2658 | u64 clid; | |
2659 | ||
a204f25e BF |
2660 | clp = get_nfsdfs_clp(inode); |
2661 | if (!clp) | |
97ad4031 | 2662 | return -ENXIO; |
97ad4031 BF |
2663 | memcpy(&clid, &clp->cl_clientid, sizeof(clid)); |
2664 | seq_printf(m, "clientid: 0x%llx\n", clid); | |
169319f1 | 2665 | seq_printf(m, "address: \"%pISpc\"\n", (struct sockaddr *)&clp->cl_addr); |
e9488d5a DN |
2666 | |
2667 | if (clp->cl_state == NFSD4_COURTESY) | |
2668 | seq_puts(m, "status: courtesy\n"); | |
2669 | else if (clp->cl_state == NFSD4_EXPIRABLE) | |
2670 | seq_puts(m, "status: expirable\n"); | |
2671 | else if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) | |
472d155a N |
2672 | seq_puts(m, "status: confirmed\n"); |
2673 | else | |
2674 | seq_puts(m, "status: unconfirmed\n"); | |
e9488d5a DN |
2675 | seq_printf(m, "seconds from last renew: %lld\n", |
2676 | ktime_get_boottime_seconds() - clp->cl_time); | |
39e1be64 | 2677 | seq_puts(m, "name: "); |
169319f1 BF |
2678 | seq_quote_mem(m, clp->cl_name.data, clp->cl_name.len); |
2679 | seq_printf(m, "\nminor version: %d\n", clp->cl_minorversion); | |
79123444 | 2680 | if (clp->cl_nii_domain.data) { |
39e1be64 | 2681 | seq_puts(m, "Implementation domain: "); |
79123444 BF |
2682 | seq_quote_mem(m, clp->cl_nii_domain.data, |
2683 | clp->cl_nii_domain.len); | |
39e1be64 | 2684 | seq_puts(m, "\nImplementation name: "); |
79123444 | 2685 | seq_quote_mem(m, clp->cl_nii_name.data, clp->cl_nii_name.len); |
e29f4703 | 2686 | seq_printf(m, "\nImplementation time: [%lld, %ld]\n", |
79123444 BF |
2687 | clp->cl_nii_time.tv_sec, clp->cl_nii_time.tv_nsec); |
2688 | } | |
3518c866 DW |
2689 | seq_printf(m, "callback state: %s\n", cb_state2str(clp->cl_cb_state)); |
2690 | seq_printf(m, "callback address: %pISpc\n", &clp->cl_cb_conn.cb_addr); | |
1ac3629b N |
2691 | seq_printf(m, "admin-revoked states: %d\n", |
2692 | atomic_read(&clp->cl_admin_revoked)); | |
97ad4031 BF |
2693 | drop_client(clp); |
2694 | ||
2695 | return 0; | |
2696 | } | |
2697 | ||
1d7f6b30 | 2698 | DEFINE_SHOW_ATTRIBUTE(client_info); |
97ad4031 | 2699 | |
78599c42 BF |
2700 | static void *states_start(struct seq_file *s, loff_t *pos) |
2701 | __acquires(&clp->cl_lock) | |
2702 | { | |
2703 | struct nfs4_client *clp = s->private; | |
2704 | unsigned long id = *pos; | |
2705 | void *ret; | |
2706 | ||
2707 | spin_lock(&clp->cl_lock); | |
2708 | ret = idr_get_next_ul(&clp->cl_stateids, &id); | |
2709 | *pos = id; | |
2710 | return ret; | |
2711 | } | |
2712 | ||
2713 | static void *states_next(struct seq_file *s, void *v, loff_t *pos) | |
2714 | { | |
2715 | struct nfs4_client *clp = s->private; | |
2716 | unsigned long id = *pos; | |
2717 | void *ret; | |
2718 | ||
2719 | id = *pos; | |
2720 | id++; | |
2721 | ret = idr_get_next_ul(&clp->cl_stateids, &id); | |
2722 | *pos = id; | |
2723 | return ret; | |
2724 | } | |
2725 | ||
2726 | static void states_stop(struct seq_file *s, void *v) | |
2727 | __releases(&clp->cl_lock) | |
2728 | { | |
2729 | struct nfs4_client *clp = s->private; | |
2730 | ||
2731 | spin_unlock(&clp->cl_lock); | |
2732 | } | |
2733 | ||
580da465 AG |
2734 | static void nfs4_show_fname(struct seq_file *s, struct nfsd_file *f) |
2735 | { | |
2736 | seq_printf(s, "filename: \"%pD2\"", f->nf_file); | |
2737 | } | |
2738 | ||
fd4f83fd | 2739 | static void nfs4_show_superblock(struct seq_file *s, struct nfsd_file *f) |
78599c42 | 2740 | { |
427f5f83 | 2741 | struct inode *inode = file_inode(f->nf_file); |
78599c42 BF |
2742 | |
2743 | seq_printf(s, "superblock: \"%02x:%02x:%ld\"", | |
2744 | MAJOR(inode->i_sb->s_dev), | |
2745 | MINOR(inode->i_sb->s_dev), | |
2746 | inode->i_ino); | |
2747 | } | |
2748 | ||
2749 | static void nfs4_show_owner(struct seq_file *s, struct nfs4_stateowner *oo) | |
2750 | { | |
39e1be64 | 2751 | seq_puts(s, "owner: "); |
78599c42 BF |
2752 | seq_quote_mem(s, oo->so_owner.data, oo->so_owner.len); |
2753 | } | |
2754 | ||
ace7ade4 BF |
2755 | static void nfs4_show_stateid(struct seq_file *s, stateid_t *stid) |
2756 | { | |
ee590d25 BF |
2757 | seq_printf(s, "0x%.8x", stid->si_generation); |
2758 | seq_printf(s, "%12phN", &stid->si_opaque); | |
ace7ade4 BF |
2759 | } |
2760 | ||
78599c42 BF |
2761 | static int nfs4_show_open(struct seq_file *s, struct nfs4_stid *st) |
2762 | { | |
2763 | struct nfs4_ol_stateid *ols; | |
2764 | struct nfs4_file *nf; | |
fd4f83fd | 2765 | struct nfsd_file *file; |
78599c42 BF |
2766 | struct nfs4_stateowner *oo; |
2767 | unsigned int access, deny; | |
2768 | ||
78599c42 BF |
2769 | ols = openlockstateid(st); |
2770 | oo = ols->st_stateowner; | |
2771 | nf = st->sc_file; | |
e0aa6510 | 2772 | |
39e1be64 | 2773 | seq_puts(s, "- "); |
ace7ade4 | 2774 | nfs4_show_stateid(s, &st->sc_stateid); |
39e1be64 | 2775 | seq_puts(s, ": { type: open, "); |
78599c42 BF |
2776 | |
2777 | access = bmap_to_share_mode(ols->st_access_bmap); | |
2778 | deny = bmap_to_share_mode(ols->st_deny_bmap); | |
2779 | ||
c4b77edb | 2780 | seq_printf(s, "access: %s%s, ", |
78599c42 BF |
2781 | access & NFS4_SHARE_ACCESS_READ ? "r" : "-", |
2782 | access & NFS4_SHARE_ACCESS_WRITE ? "w" : "-"); | |
c4b77edb | 2783 | seq_printf(s, "deny: %s%s, ", |
78599c42 BF |
2784 | deny & NFS4_SHARE_ACCESS_READ ? "r" : "-", |
2785 | deny & NFS4_SHARE_ACCESS_WRITE ? "w" : "-"); | |
2786 | ||
39e1be64 N |
2787 | spin_lock(&nf->fi_lock); |
2788 | file = find_any_file_locked(nf); | |
2789 | if (file) { | |
2790 | nfs4_show_superblock(s, file); | |
2791 | seq_puts(s, ", "); | |
2792 | nfs4_show_fname(s, file); | |
2793 | seq_puts(s, ", "); | |
2794 | } | |
e0aa6510 | 2795 | spin_unlock(&nf->fi_lock); |
39e1be64 | 2796 | nfs4_show_owner(s, oo); |
11b2cfbf N |
2797 | if (st->sc_status & SC_STATUS_ADMIN_REVOKED) |
2798 | seq_puts(s, ", admin-revoked"); | |
39e1be64 | 2799 | seq_puts(s, " }\n"); |
16d36e09 BF |
2800 | return 0; |
2801 | } | |
2802 | ||
2803 | static int nfs4_show_lock(struct seq_file *s, struct nfs4_stid *st) | |
2804 | { | |
2805 | struct nfs4_ol_stateid *ols; | |
2806 | struct nfs4_file *nf; | |
fd4f83fd | 2807 | struct nfsd_file *file; |
16d36e09 BF |
2808 | struct nfs4_stateowner *oo; |
2809 | ||
2810 | ols = openlockstateid(st); | |
2811 | oo = ols->st_stateowner; | |
2812 | nf = st->sc_file; | |
16d36e09 | 2813 | |
39e1be64 | 2814 | seq_puts(s, "- "); |
ace7ade4 | 2815 | nfs4_show_stateid(s, &st->sc_stateid); |
39e1be64 | 2816 | seq_puts(s, ": { type: lock, "); |
16d36e09 | 2817 | |
39e1be64 N |
2818 | spin_lock(&nf->fi_lock); |
2819 | file = find_any_file_locked(nf); | |
2820 | if (file) { | |
2821 | /* | |
2822 | * Note: a lock stateid isn't really the same thing as a lock, | |
2823 | * it's the locking state held by one owner on a file, and there | |
2824 | * may be multiple (or no) lock ranges associated with it. | |
2825 | * (Same for the matter is true of open stateids.) | |
2826 | */ | |
78599c42 | 2827 | |
39e1be64 N |
2828 | nfs4_show_superblock(s, file); |
2829 | /* XXX: open stateid? */ | |
2830 | seq_puts(s, ", "); | |
2831 | nfs4_show_fname(s, file); | |
2832 | seq_puts(s, ", "); | |
2833 | } | |
16d36e09 | 2834 | nfs4_show_owner(s, oo); |
11b2cfbf N |
2835 | if (st->sc_status & SC_STATUS_ADMIN_REVOKED) |
2836 | seq_puts(s, ", admin-revoked"); | |
39e1be64 | 2837 | seq_puts(s, " }\n"); |
e0aa6510 | 2838 | spin_unlock(&nf->fi_lock); |
78599c42 BF |
2839 | return 0; |
2840 | } | |
2841 | ||
16d36e09 BF |
2842 | static int nfs4_show_deleg(struct seq_file *s, struct nfs4_stid *st) |
2843 | { | |
2844 | struct nfs4_delegation *ds; | |
2845 | struct nfs4_file *nf; | |
eb82dd39 | 2846 | struct nfsd_file *file; |
16d36e09 BF |
2847 | |
2848 | ds = delegstateid(st); | |
2849 | nf = st->sc_file; | |
16d36e09 | 2850 | |
39e1be64 | 2851 | seq_puts(s, "- "); |
ace7ade4 | 2852 | nfs4_show_stateid(s, &st->sc_stateid); |
39e1be64 | 2853 | seq_puts(s, ": { type: deleg, "); |
16d36e09 | 2854 | |
39e1be64 N |
2855 | seq_printf(s, "access: %s", |
2856 | ds->dl_type == NFS4_OPEN_DELEGATE_READ ? "r" : "w"); | |
16d36e09 BF |
2857 | |
2858 | /* XXX: lease time, whether it's being recalled. */ | |
2859 | ||
39e1be64 N |
2860 | spin_lock(&nf->fi_lock); |
2861 | file = nf->fi_deleg_file; | |
2862 | if (file) { | |
2863 | seq_puts(s, ", "); | |
2864 | nfs4_show_superblock(s, file); | |
2865 | seq_puts(s, ", "); | |
2866 | nfs4_show_fname(s, file); | |
2867 | } | |
e0aa6510 | 2868 | spin_unlock(&nf->fi_lock); |
11b2cfbf N |
2869 | if (st->sc_status & SC_STATUS_ADMIN_REVOKED) |
2870 | seq_puts(s, ", admin-revoked"); | |
2871 | seq_puts(s, " }\n"); | |
16d36e09 BF |
2872 | return 0; |
2873 | } | |
2874 | ||
0c4b62b0 BF |
2875 | static int nfs4_show_layout(struct seq_file *s, struct nfs4_stid *st) |
2876 | { | |
2877 | struct nfs4_layout_stateid *ls; | |
eb82dd39 | 2878 | struct nfsd_file *file; |
0c4b62b0 BF |
2879 | |
2880 | ls = container_of(st, struct nfs4_layout_stateid, ls_stid); | |
0c4b62b0 | 2881 | |
39e1be64 | 2882 | seq_puts(s, "- "); |
ace7ade4 | 2883 | nfs4_show_stateid(s, &st->sc_stateid); |
39e1be64 | 2884 | seq_puts(s, ": { type: layout"); |
0c4b62b0 BF |
2885 | |
2886 | /* XXX: What else would be useful? */ | |
2887 | ||
1e33e141 N |
2888 | spin_lock(&ls->ls_stid.sc_file->fi_lock); |
2889 | file = ls->ls_file; | |
39e1be64 N |
2890 | if (file) { |
2891 | seq_puts(s, ", "); | |
2892 | nfs4_show_superblock(s, file); | |
2893 | seq_puts(s, ", "); | |
2894 | nfs4_show_fname(s, file); | |
2895 | } | |
1e33e141 | 2896 | spin_unlock(&ls->ls_stid.sc_file->fi_lock); |
11b2cfbf N |
2897 | if (st->sc_status & SC_STATUS_ADMIN_REVOKED) |
2898 | seq_puts(s, ", admin-revoked"); | |
39e1be64 | 2899 | seq_puts(s, " }\n"); |
0c4b62b0 BF |
2900 | |
2901 | return 0; | |
2902 | } | |
2903 | ||
78599c42 BF |
2904 | static int states_show(struct seq_file *s, void *v) |
2905 | { | |
2906 | struct nfs4_stid *st = v; | |
2907 | ||
2908 | switch (st->sc_type) { | |
3f29cc82 | 2909 | case SC_TYPE_OPEN: |
78599c42 | 2910 | return nfs4_show_open(s, st); |
3f29cc82 | 2911 | case SC_TYPE_LOCK: |
16d36e09 | 2912 | return nfs4_show_lock(s, st); |
3f29cc82 | 2913 | case SC_TYPE_DELEG: |
16d36e09 | 2914 | return nfs4_show_deleg(s, st); |
3f29cc82 | 2915 | case SC_TYPE_LAYOUT: |
0c4b62b0 | 2916 | return nfs4_show_layout(s, st); |
78599c42 BF |
2917 | default: |
2918 | return 0; /* XXX: or SEQ_SKIP? */ | |
2919 | } | |
16d36e09 | 2920 | /* XXX: copy stateids? */ |
78599c42 BF |
2921 | } |
2922 | ||
2923 | static struct seq_operations states_seq_ops = { | |
2924 | .start = states_start, | |
2925 | .next = states_next, | |
2926 | .stop = states_stop, | |
2927 | .show = states_show | |
2928 | }; | |
2929 | ||
2930 | static int client_states_open(struct inode *inode, struct file *file) | |
2931 | { | |
78599c42 BF |
2932 | struct seq_file *s; |
2933 | struct nfs4_client *clp; | |
2934 | int ret; | |
2935 | ||
a204f25e BF |
2936 | clp = get_nfsdfs_clp(inode); |
2937 | if (!clp) | |
78599c42 | 2938 | return -ENXIO; |
78599c42 BF |
2939 | |
2940 | ret = seq_open(file, &states_seq_ops); | |
2941 | if (ret) | |
2942 | return ret; | |
2943 | s = file->private_data; | |
2944 | s->private = clp; | |
2945 | return 0; | |
2946 | } | |
2947 | ||
2948 | static int client_opens_release(struct inode *inode, struct file *file) | |
2949 | { | |
2950 | struct seq_file *m = file->private_data; | |
2951 | struct nfs4_client *clp = m->private; | |
2952 | ||
2953 | /* XXX: alternatively, we could get/drop in seq start/stop */ | |
2954 | drop_client(clp); | |
bc1b5acb | 2955 | return seq_release(inode, file); |
78599c42 BF |
2956 | } |
2957 | ||
2958 | static const struct file_operations client_states_fops = { | |
2959 | .open = client_states_open, | |
2960 | .read = seq_read, | |
2961 | .llseek = seq_lseek, | |
2962 | .release = client_opens_release, | |
2963 | }; | |
2964 | ||
89c905be BF |
2965 | /* |
2966 | * Normally we refuse to destroy clients that are in use, but here the | |
2967 | * administrator is telling us to just do it. We also want to wait | |
2968 | * so the caller has a guarantee that the client's locks are gone by | |
2969 | * the time the write returns: | |
2970 | */ | |
297e57a2 | 2971 | static void force_expire_client(struct nfs4_client *clp) |
89c905be BF |
2972 | { |
2973 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
2974 | bool already_expired; | |
2975 | ||
2958d2ee CL |
2976 | trace_nfsd_clid_admin_expired(&clp->cl_clientid); |
2977 | ||
f7104cc1 | 2978 | spin_lock(&nn->client_lock); |
89c905be | 2979 | clp->cl_time = 0; |
f7104cc1 | 2980 | spin_unlock(&nn->client_lock); |
89c905be BF |
2981 | |
2982 | wait_event(expiry_wq, atomic_read(&clp->cl_rpc_users) == 0); | |
2983 | spin_lock(&nn->client_lock); | |
2984 | already_expired = list_empty(&clp->cl_lru); | |
2985 | if (!already_expired) | |
2986 | unhash_client_locked(clp); | |
2987 | spin_unlock(&nn->client_lock); | |
2988 | ||
2989 | if (!already_expired) | |
2990 | expire_client(clp); | |
2991 | else | |
2992 | wait_event(expiry_wq, clp->cl_nfsd_dentry == NULL); | |
2993 | } | |
2994 | ||
2995 | static ssize_t client_ctl_write(struct file *file, const char __user *buf, | |
2996 | size_t size, loff_t *pos) | |
2997 | { | |
2998 | char *data; | |
2999 | struct nfs4_client *clp; | |
3000 | ||
3001 | data = simple_transaction_get(file, buf, size); | |
3002 | if (IS_ERR(data)) | |
3003 | return PTR_ERR(data); | |
3004 | if (size != 7 || 0 != memcmp(data, "expire\n", 7)) | |
3005 | return -EINVAL; | |
3006 | clp = get_nfsdfs_clp(file_inode(file)); | |
3007 | if (!clp) | |
3008 | return -ENXIO; | |
3009 | force_expire_client(clp); | |
3010 | drop_client(clp); | |
3011 | return 7; | |
3012 | } | |
3013 | ||
3014 | static const struct file_operations client_ctl_fops = { | |
3015 | .write = client_ctl_write, | |
3016 | .release = simple_transaction_release, | |
3017 | }; | |
3018 | ||
97ad4031 BF |
3019 | static const struct tree_descr client_files[] = { |
3020 | [0] = {"info", &client_info_fops, S_IRUSR}, | |
78599c42 | 3021 | [1] = {"states", &client_states_fops, S_IRUSR}, |
6cbfad5f | 3022 | [2] = {"ctl", &client_ctl_fops, S_IWUSR}, |
78599c42 | 3023 | [3] = {""}, |
97ad4031 BF |
3024 | }; |
3025 | ||
44df6f43 DN |
3026 | static int |
3027 | nfsd4_cb_recall_any_done(struct nfsd4_callback *cb, | |
3028 | struct rpc_task *task) | |
3029 | { | |
638593be | 3030 | trace_nfsd_cb_recall_any_done(cb, task); |
44df6f43 DN |
3031 | switch (task->tk_status) { |
3032 | case -NFS4ERR_DELAY: | |
3033 | rpc_delay(task, 2 * HZ); | |
3034 | return 0; | |
3035 | default: | |
3036 | return 1; | |
3037 | } | |
3038 | } | |
3039 | ||
3040 | static void | |
3041 | nfsd4_cb_recall_any_release(struct nfsd4_callback *cb) | |
3042 | { | |
3043 | struct nfs4_client *clp = cb->cb_clp; | |
3044 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
3045 | ||
3046 | spin_lock(&nn->client_lock); | |
3047 | clear_bit(NFSD4_CLIENT_CB_RECALL_ANY, &clp->cl_flags); | |
3048 | put_client_renew_locked(clp); | |
3049 | spin_unlock(&nn->client_lock); | |
3050 | } | |
3051 | ||
c5967721 DN |
3052 | static int |
3053 | nfsd4_cb_getattr_done(struct nfsd4_callback *cb, struct rpc_task *task) | |
3054 | { | |
3055 | struct nfs4_cb_fattr *ncf = | |
3056 | container_of(cb, struct nfs4_cb_fattr, ncf_getattr); | |
3057 | ||
3058 | ncf->ncf_cb_status = task->tk_status; | |
3059 | switch (task->tk_status) { | |
3060 | case -NFS4ERR_DELAY: | |
3061 | rpc_delay(task, 2 * HZ); | |
3062 | return 0; | |
3063 | default: | |
3064 | return 1; | |
3065 | } | |
3066 | } | |
3067 | ||
3068 | static void | |
3069 | nfsd4_cb_getattr_release(struct nfsd4_callback *cb) | |
3070 | { | |
3071 | struct nfs4_cb_fattr *ncf = | |
3072 | container_of(cb, struct nfs4_cb_fattr, ncf_getattr); | |
3073 | struct nfs4_delegation *dp = | |
3074 | container_of(ncf, struct nfs4_delegation, dl_cb_fattr); | |
3075 | ||
3076 | nfs4_put_stid(&dp->dl_stid); | |
3077 | clear_bit(CB_GETATTR_BUSY, &ncf->ncf_cb_flags); | |
3078 | wake_up_bit(&ncf->ncf_cb_flags, CB_GETATTR_BUSY); | |
3079 | } | |
3080 | ||
44df6f43 DN |
3081 | static const struct nfsd4_callback_ops nfsd4_cb_recall_any_ops = { |
3082 | .done = nfsd4_cb_recall_any_done, | |
3083 | .release = nfsd4_cb_recall_any_release, | |
3084 | }; | |
3085 | ||
c5967721 DN |
3086 | static const struct nfsd4_callback_ops nfsd4_cb_getattr_ops = { |
3087 | .done = nfsd4_cb_getattr_done, | |
3088 | .release = nfsd4_cb_getattr_release, | |
3089 | }; | |
3090 | ||
3091 | static void nfs4_cb_getattr(struct nfs4_cb_fattr *ncf) | |
3092 | { | |
3093 | struct nfs4_delegation *dp = | |
3094 | container_of(ncf, struct nfs4_delegation, dl_cb_fattr); | |
3095 | ||
3096 | if (test_and_set_bit(CB_GETATTR_BUSY, &ncf->ncf_cb_flags)) | |
3097 | return; | |
3098 | /* set to proper status when nfsd4_cb_getattr_done runs */ | |
3099 | ncf->ncf_cb_status = NFS4ERR_IO; | |
3100 | ||
3101 | refcount_inc(&dp->dl_stid.sc_count); | |
3102 | nfsd4_run_cb(&ncf->ncf_getattr); | |
3103 | } | |
3104 | ||
2216d449 | 3105 | static struct nfs4_client *create_client(struct xdr_netobj name, |
b09333c4 RL |
3106 | struct svc_rqst *rqstp, nfs4_verifier *verf) |
3107 | { | |
3108 | struct nfs4_client *clp; | |
3109 | struct sockaddr *sa = svc_addr(rqstp); | |
03a4e1f6 | 3110 | int ret; |
c212cecf | 3111 | struct net *net = SVC_NET(rqstp); |
e8a79fb1 | 3112 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
472d155a | 3113 | struct dentry *dentries[ARRAY_SIZE(client_files)]; |
b09333c4 | 3114 | |
0926c395 | 3115 | clp = alloc_client(name, nn); |
b09333c4 RL |
3116 | if (clp == NULL) |
3117 | return NULL; | |
3118 | ||
03a4e1f6 BF |
3119 | ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); |
3120 | if (ret) { | |
03a4e1f6 | 3121 | free_client(clp); |
03a4e1f6 | 3122 | return NULL; |
b09333c4 | 3123 | } |
e8a79fb1 BF |
3124 | gen_clid(clp, nn); |
3125 | kref_init(&clp->cl_nfsdfs.cl_ref); | |
0162ac2b | 3126 | nfsd4_init_cb(&clp->cl_cb_null, clp, NULL, NFSPROC4_CLNT_CB_NULL); |
20b7d86f | 3127 | clp->cl_time = ktime_get_boottime_seconds(); |
b09333c4 | 3128 | clear_bit(0, &clp->cl_cb_slot_busy); |
b09333c4 | 3129 | copy_verf(clp, verf); |
3bade247 | 3130 | memcpy(&clp->cl_addr, sa, sizeof(struct sockaddr_storage)); |
edd76786 | 3131 | clp->cl_cb_session = NULL; |
c212cecf | 3132 | clp->net = net; |
472d155a N |
3133 | clp->cl_nfsd_dentry = nfsd_client_mkdir( |
3134 | nn, &clp->cl_nfsdfs, | |
3135 | clp->cl_clientid.cl_id - nn->clientid_base, | |
3136 | client_files, dentries); | |
3137 | clp->cl_nfsd_info_dentry = dentries[0]; | |
e8a79fb1 BF |
3138 | if (!clp->cl_nfsd_dentry) { |
3139 | free_client(clp); | |
3140 | return NULL; | |
3141 | } | |
44df6f43 DN |
3142 | clp->cl_ra = kzalloc(sizeof(*clp->cl_ra), GFP_KERNEL); |
3143 | if (!clp->cl_ra) { | |
3144 | free_client(clp); | |
3145 | return NULL; | |
3146 | } | |
3147 | clp->cl_ra_time = 0; | |
3148 | nfsd4_init_cb(&clp->cl_ra->ra_cb, clp, &nfsd4_cb_recall_any_ops, | |
3149 | NFSPROC4_CLNT_CB_RECALL_ANY); | |
b09333c4 RL |
3150 | return clp; |
3151 | } | |
3152 | ||
fd39ca9a | 3153 | static void |
ac55fdc4 JL |
3154 | add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root) |
3155 | { | |
3156 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
3157 | struct nfs4_client *clp; | |
3158 | ||
3159 | while (*new) { | |
3160 | clp = rb_entry(*new, struct nfs4_client, cl_namenode); | |
3161 | parent = *new; | |
3162 | ||
3163 | if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0) | |
3164 | new = &((*new)->rb_left); | |
3165 | else | |
3166 | new = &((*new)->rb_right); | |
3167 | } | |
3168 | ||
3169 | rb_link_node(&new_clp->cl_namenode, parent, new); | |
3170 | rb_insert_color(&new_clp->cl_namenode, root); | |
3171 | } | |
3172 | ||
3173 | static struct nfs4_client * | |
3174 | find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root) | |
3175 | { | |
ef17af2a | 3176 | int cmp; |
ac55fdc4 JL |
3177 | struct rb_node *node = root->rb_node; |
3178 | struct nfs4_client *clp; | |
3179 | ||
3180 | while (node) { | |
3181 | clp = rb_entry(node, struct nfs4_client, cl_namenode); | |
3182 | cmp = compare_blob(&clp->cl_name, name); | |
3183 | if (cmp > 0) | |
3184 | node = node->rb_left; | |
3185 | else if (cmp < 0) | |
3186 | node = node->rb_right; | |
3187 | else | |
3188 | return clp; | |
3189 | } | |
3190 | return NULL; | |
3191 | } | |
3192 | ||
3193 | static void | |
3194 | add_to_unconfirmed(struct nfs4_client *clp) | |
1da177e4 LT |
3195 | { |
3196 | unsigned int idhashval; | |
0a7ec377 | 3197 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 3198 | |
0a880a28 TM |
3199 | lockdep_assert_held(&nn->client_lock); |
3200 | ||
ac55fdc4 | 3201 | clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
a99454aa | 3202 | add_clp_to_name_tree(clp, &nn->unconf_name_tree); |
1da177e4 | 3203 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
0a7ec377 | 3204 | list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]); |
3dbacee6 | 3205 | renew_client_locked(clp); |
1da177e4 LT |
3206 | } |
3207 | ||
fd39ca9a | 3208 | static void |
1da177e4 LT |
3209 | move_to_confirmed(struct nfs4_client *clp) |
3210 | { | |
3211 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
8daae4dc | 3212 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 3213 | |
0a880a28 TM |
3214 | lockdep_assert_held(&nn->client_lock); |
3215 | ||
8daae4dc | 3216 | list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]); |
a99454aa | 3217 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
382a62e7 | 3218 | add_clp_to_name_tree(clp, &nn->conf_name_tree); |
934bd07f BF |
3219 | set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
3220 | trace_nfsd_clid_confirmed(&clp->cl_clientid); | |
3dbacee6 | 3221 | renew_client_locked(clp); |
1da177e4 LT |
3222 | } |
3223 | ||
3224 | static struct nfs4_client * | |
bfa85e83 | 3225 | find_client_in_id_table(struct list_head *tbl, clientid_t *clid, bool sessions) |
1da177e4 LT |
3226 | { |
3227 | struct nfs4_client *clp; | |
3228 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
3229 | ||
bfa85e83 | 3230 | list_for_each_entry(clp, &tbl[idhashval], cl_idhash) { |
a50d2ad1 | 3231 | if (same_clid(&clp->cl_clientid, clid)) { |
d15c077e BF |
3232 | if ((bool)clp->cl_minorversion != sessions) |
3233 | return NULL; | |
3dbacee6 | 3234 | renew_client_locked(clp); |
1da177e4 | 3235 | return clp; |
a50d2ad1 | 3236 | } |
1da177e4 LT |
3237 | } |
3238 | return NULL; | |
3239 | } | |
3240 | ||
bfa85e83 BF |
3241 | static struct nfs4_client * |
3242 | find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) | |
3243 | { | |
3244 | struct list_head *tbl = nn->conf_id_hashtbl; | |
3245 | ||
0a880a28 | 3246 | lockdep_assert_held(&nn->client_lock); |
bfa85e83 BF |
3247 | return find_client_in_id_table(tbl, clid, sessions); |
3248 | } | |
3249 | ||
1da177e4 | 3250 | static struct nfs4_client * |
0a7ec377 | 3251 | find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
1da177e4 | 3252 | { |
bfa85e83 | 3253 | struct list_head *tbl = nn->unconf_id_hashtbl; |
1da177e4 | 3254 | |
0a880a28 | 3255 | lockdep_assert_held(&nn->client_lock); |
bfa85e83 | 3256 | return find_client_in_id_table(tbl, clid, sessions); |
1da177e4 LT |
3257 | } |
3258 | ||
6e5f15c9 | 3259 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 3260 | { |
6e5f15c9 | 3261 | return clp->cl_exchange_flags != 0; |
e203d506 | 3262 | } |
a1bcecd2 | 3263 | |
28ce6054 | 3264 | static struct nfs4_client * |
382a62e7 | 3265 | find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 3266 | { |
0a880a28 | 3267 | lockdep_assert_held(&nn->client_lock); |
382a62e7 | 3268 | return find_clp_in_name_tree(name, &nn->conf_name_tree); |
28ce6054 N |
3269 | } |
3270 | ||
3271 | static struct nfs4_client * | |
a99454aa | 3272 | find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 3273 | { |
0a880a28 | 3274 | lockdep_assert_held(&nn->client_lock); |
a99454aa | 3275 | return find_clp_in_name_tree(name, &nn->unconf_name_tree); |
28ce6054 N |
3276 | } |
3277 | ||
fd39ca9a | 3278 | static void |
6f3d772f | 3279 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 3280 | { |
07263f1e | 3281 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
3282 | struct sockaddr *sa = svc_addr(rqstp); |
3283 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
3284 | unsigned short expected_family; |
3285 | ||
3286 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
3287 | if (se->se_callback_netid_len == 3 && | |
3288 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
3289 | expected_family = AF_INET; | |
3290 | else if (se->se_callback_netid_len == 4 && | |
3291 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
3292 | expected_family = AF_INET6; | |
3293 | else | |
1da177e4 LT |
3294 | goto out_err; |
3295 | ||
c212cecf | 3296 | conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val, |
aa9a4ec7 | 3297 | se->se_callback_addr_len, |
07263f1e BF |
3298 | (struct sockaddr *)&conn->cb_addr, |
3299 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 3300 | |
07263f1e | 3301 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 3302 | goto out_err; |
aa9a4ec7 | 3303 | |
07263f1e BF |
3304 | if (conn->cb_addr.ss_family == AF_INET6) |
3305 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 3306 | |
07263f1e BF |
3307 | conn->cb_prog = se->se_callback_prog; |
3308 | conn->cb_ident = se->se_callback_ident; | |
849a1cf1 | 3309 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
1eace0d1 | 3310 | trace_nfsd_cb_args(clp, conn); |
1da177e4 LT |
3311 | return; |
3312 | out_err: | |
07263f1e BF |
3313 | conn->cb_addr.ss_family = AF_UNSPEC; |
3314 | conn->cb_addrlen = 0; | |
1eace0d1 | 3315 | trace_nfsd_cb_nodelegs(clp); |
1da177e4 LT |
3316 | return; |
3317 | } | |
3318 | ||
074fe897 | 3319 | /* |
067e1ace | 3320 | * Cache a reply. nfsd4_check_resp_size() has bounded the cache size. |
074fe897 | 3321 | */ |
b607664e | 3322 | static void |
074fe897 | 3323 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) |
074fe897 | 3324 | { |
bddfdbcd | 3325 | struct xdr_buf *buf = resp->xdr->buf; |
557ce264 AA |
3326 | struct nfsd4_slot *slot = resp->cstate.slot; |
3327 | unsigned int base; | |
074fe897 | 3328 | |
557ce264 | 3329 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 3330 | |
085def3a | 3331 | slot->sl_flags |= NFSD4_SLOT_INITIALIZED; |
557ce264 AA |
3332 | slot->sl_opcnt = resp->opcnt; |
3333 | slot->sl_status = resp->cstate.status; | |
53da6a53 BF |
3334 | free_svc_cred(&slot->sl_cred); |
3335 | copy_cred(&slot->sl_cred, &resp->rqstp->rq_cred); | |
074fe897 | 3336 | |
085def3a BF |
3337 | if (!nfsd4_cache_this(resp)) { |
3338 | slot->sl_flags &= ~NFSD4_SLOT_CACHED; | |
bf864a31 | 3339 | return; |
074fe897 | 3340 | } |
085def3a BF |
3341 | slot->sl_flags |= NFSD4_SLOT_CACHED; |
3342 | ||
f5236013 BF |
3343 | base = resp->cstate.data_offset; |
3344 | slot->sl_datalen = buf->len - base; | |
3345 | if (read_bytes_from_xdr_buf(buf, base, slot->sl_data, slot->sl_datalen)) | |
d3f03403 DC |
3346 | WARN(1, "%s: sessions DRC could not cache compound\n", |
3347 | __func__); | |
557ce264 | 3348 | return; |
074fe897 AA |
3349 | } |
3350 | ||
3351 | /* | |
abfabf8c AA |
3352 | * Encode the replay sequence operation from the slot values. |
3353 | * If cachethis is FALSE encode the uncached rep error on the next | |
3354 | * operation which sets resp->p and increments resp->opcnt for | |
3355 | * nfs4svc_encode_compoundres. | |
074fe897 | 3356 | * |
074fe897 | 3357 | */ |
abfabf8c AA |
3358 | static __be32 |
3359 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
3360 | struct nfsd4_compoundres *resp) | |
074fe897 | 3361 | { |
abfabf8c AA |
3362 | struct nfsd4_op *op; |
3363 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 3364 | |
abfabf8c AA |
3365 | /* Encode the replayed sequence operation */ |
3366 | op = &args->ops[resp->opcnt - 1]; | |
3367 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 3368 | |
085def3a BF |
3369 | if (slot->sl_flags & NFSD4_SLOT_CACHED) |
3370 | return op->status; | |
3371 | if (args->opcnt == 1) { | |
3372 | /* | |
3373 | * The original operation wasn't a solo sequence--we | |
3374 | * always cache those--so this retry must not match the | |
3375 | * original: | |
3376 | */ | |
3377 | op->status = nfserr_seq_false_retry; | |
3378 | } else { | |
abfabf8c AA |
3379 | op = &args->ops[resp->opcnt++]; |
3380 | op->status = nfserr_retry_uncached_rep; | |
3381 | nfsd4_encode_operation(resp, op); | |
074fe897 | 3382 | } |
abfabf8c | 3383 | return op->status; |
074fe897 AA |
3384 | } |
3385 | ||
3386 | /* | |
557ce264 AA |
3387 | * The sequence operation is not cached because we can use the slot and |
3388 | * session values. | |
074fe897 | 3389 | */ |
3ca2eb98 | 3390 | static __be32 |
bf864a31 AA |
3391 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
3392 | struct nfsd4_sequence *seq) | |
074fe897 | 3393 | { |
557ce264 | 3394 | struct nfsd4_slot *slot = resp->cstate.slot; |
bddfdbcd | 3395 | struct xdr_stream *xdr = resp->xdr; |
f5236013 | 3396 | __be32 *p; |
074fe897 AA |
3397 | __be32 status; |
3398 | ||
557ce264 | 3399 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 3400 | |
abfabf8c | 3401 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); |
0da7b19c | 3402 | if (status) |
abfabf8c | 3403 | return status; |
074fe897 | 3404 | |
f5236013 BF |
3405 | p = xdr_reserve_space(xdr, slot->sl_datalen); |
3406 | if (!p) { | |
3407 | WARN_ON_ONCE(1); | |
3408 | return nfserr_serverfault; | |
3409 | } | |
3410 | xdr_encode_opaque_fixed(p, slot->sl_data, slot->sl_datalen); | |
3411 | xdr_commit_encode(xdr); | |
074fe897 | 3412 | |
557ce264 | 3413 | resp->opcnt = slot->sl_opcnt; |
f5236013 | 3414 | return slot->sl_status; |
074fe897 AA |
3415 | } |
3416 | ||
0733d213 AA |
3417 | /* |
3418 | * Set the exchange_id flags returned by the server. | |
3419 | */ | |
3420 | static void | |
3421 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
3422 | { | |
9cf514cc CH |
3423 | #ifdef CONFIG_NFSD_PNFS |
3424 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_PNFS_MDS; | |
3425 | #else | |
0733d213 | 3426 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; |
9cf514cc | 3427 | #endif |
0733d213 AA |
3428 | |
3429 | /* Referrals are supported, Migration is not. */ | |
3430 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
3431 | ||
3432 | /* set the wire flags to return to client. */ | |
3433 | clid->flags = new->cl_exchange_flags; | |
3434 | } | |
3435 | ||
4eaea134 BF |
3436 | static bool client_has_openowners(struct nfs4_client *clp) |
3437 | { | |
3438 | struct nfs4_openowner *oo; | |
3439 | ||
3440 | list_for_each_entry(oo, &clp->cl_openowners, oo_perclient) { | |
3441 | if (!list_empty(&oo->oo_owner.so_stateids)) | |
3442 | return true; | |
3443 | } | |
3444 | return false; | |
3445 | } | |
3446 | ||
631fc9ea BF |
3447 | static bool client_has_state(struct nfs4_client *clp) |
3448 | { | |
4eaea134 | 3449 | return client_has_openowners(clp) |
47e970be KM |
3450 | #ifdef CONFIG_NFSD_PNFS |
3451 | || !list_empty(&clp->cl_lo_states) | |
3452 | #endif | |
6eccece9 | 3453 | || !list_empty(&clp->cl_delegations) |
e0639dc5 OK |
3454 | || !list_empty(&clp->cl_sessions) |
3455 | || !list_empty(&clp->async_copies); | |
631fc9ea BF |
3456 | } |
3457 | ||
79123444 BF |
3458 | static __be32 copy_impl_id(struct nfs4_client *clp, |
3459 | struct nfsd4_exchange_id *exid) | |
3460 | { | |
3461 | if (!exid->nii_domain.data) | |
3462 | return 0; | |
3463 | xdr_netobj_dup(&clp->cl_nii_domain, &exid->nii_domain, GFP_KERNEL); | |
3464 | if (!clp->cl_nii_domain.data) | |
3465 | return nfserr_jukebox; | |
3466 | xdr_netobj_dup(&clp->cl_nii_name, &exid->nii_name, GFP_KERNEL); | |
3467 | if (!clp->cl_nii_name.data) | |
3468 | return nfserr_jukebox; | |
e29f4703 | 3469 | clp->cl_nii_time = exid->nii_time; |
79123444 BF |
3470 | return 0; |
3471 | } | |
3472 | ||
069b6ad4 | 3473 | __be32 |
eb69853d CH |
3474 | nfsd4_exchange_id(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3475 | union nfsd4_op_u *u) | |
069b6ad4 | 3476 | { |
eb69853d | 3477 | struct nfsd4_exchange_id *exid = &u->exchange_id; |
3dbacee6 TM |
3478 | struct nfs4_client *conf, *new; |
3479 | struct nfs4_client *unconf = NULL; | |
57b7b43b | 3480 | __be32 status; |
363168b4 | 3481 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 3482 | nfs4_verifier verf = exid->verifier; |
363168b4 | 3483 | struct sockaddr *sa = svc_addr(rqstp); |
83e08fd4 | 3484 | bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; |
c212cecf | 3485 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
0733d213 | 3486 | |
363168b4 | 3487 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 3488 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
523ec6ed | 3489 | "ip_addr=%s flags %x, spa_how %u\n", |
0733d213 | 3490 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 3491 | addr_str, exid->flags, exid->spa_how); |
0733d213 | 3492 | |
a084daf5 | 3493 | if (exid->flags & ~EXCHGID4_FLAG_MASK_A) |
0733d213 AA |
3494 | return nfserr_inval; |
3495 | ||
50c7b948 BF |
3496 | new = create_client(exid->clname, rqstp, &verf); |
3497 | if (new == NULL) | |
3498 | return nfserr_jukebox; | |
79123444 BF |
3499 | status = copy_impl_id(new, exid); |
3500 | if (status) | |
3501 | goto out_nolock; | |
50c7b948 | 3502 | |
0733d213 | 3503 | switch (exid->spa_how) { |
57266a6e | 3504 | case SP4_MACH_CRED: |
ed941643 AE |
3505 | exid->spo_must_enforce[0] = 0; |
3506 | exid->spo_must_enforce[1] = ( | |
3507 | 1 << (OP_BIND_CONN_TO_SESSION - 32) | | |
3508 | 1 << (OP_EXCHANGE_ID - 32) | | |
3509 | 1 << (OP_CREATE_SESSION - 32) | | |
3510 | 1 << (OP_DESTROY_SESSION - 32) | | |
3511 | 1 << (OP_DESTROY_CLIENTID - 32)); | |
3512 | ||
3513 | exid->spo_must_allow[0] &= (1 << (OP_CLOSE) | | |
3514 | 1 << (OP_OPEN_DOWNGRADE) | | |
3515 | 1 << (OP_LOCKU) | | |
3516 | 1 << (OP_DELEGRETURN)); | |
3517 | ||
3518 | exid->spo_must_allow[1] &= ( | |
3519 | 1 << (OP_TEST_STATEID - 32) | | |
3520 | 1 << (OP_FREE_STATEID - 32)); | |
50c7b948 BF |
3521 | if (!svc_rqst_integrity_protected(rqstp)) { |
3522 | status = nfserr_inval; | |
3523 | goto out_nolock; | |
920dd9bb BF |
3524 | } |
3525 | /* | |
3526 | * Sometimes userspace doesn't give us a principal. | |
3527 | * Which is a bug, really. Anyway, we can't enforce | |
3528 | * MACH_CRED in that case, better to give up now: | |
3529 | */ | |
414ca017 BF |
3530 | if (!new->cl_cred.cr_principal && |
3531 | !new->cl_cred.cr_raw_principal) { | |
920dd9bb BF |
3532 | status = nfserr_serverfault; |
3533 | goto out_nolock; | |
50c7b948 BF |
3534 | } |
3535 | new->cl_mach_cred = true; | |
76c50eb7 | 3536 | break; |
0733d213 AA |
3537 | case SP4_NONE: |
3538 | break; | |
063b0fb9 BF |
3539 | default: /* checked by xdr code */ |
3540 | WARN_ON_ONCE(1); | |
df561f66 | 3541 | fallthrough; |
0733d213 | 3542 | case SP4_SSV: |
8edf4b02 KM |
3543 | status = nfserr_encr_alg_unsupp; |
3544 | goto out_nolock; | |
0733d213 AA |
3545 | } |
3546 | ||
2dbb269d | 3547 | /* Cases below refer to rfc 5661 section 18.35.4: */ |
3dbacee6 | 3548 | spin_lock(&nn->client_lock); |
382a62e7 | 3549 | conf = find_confirmed_client_by_name(&exid->clname, nn); |
0733d213 | 3550 | if (conf) { |
83e08fd4 BF |
3551 | bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); |
3552 | bool verfs_match = same_verf(&verf, &conf->cl_verifier); | |
3553 | ||
136e658d BF |
3554 | if (update) { |
3555 | if (!clp_used_exchangeid(conf)) { /* buggy client */ | |
2dbb269d | 3556 | status = nfserr_inval; |
1a308118 BF |
3557 | goto out; |
3558 | } | |
dedeb13f | 3559 | if (!nfsd4_mach_creds_match(conf, rqstp)) { |
57266a6e BF |
3560 | status = nfserr_wrong_cred; |
3561 | goto out; | |
3562 | } | |
136e658d | 3563 | if (!creds_match) { /* case 9 */ |
ea236d07 | 3564 | status = nfserr_perm; |
136e658d BF |
3565 | goto out; |
3566 | } | |
3567 | if (!verfs_match) { /* case 8 */ | |
0733d213 AA |
3568 | status = nfserr_not_same; |
3569 | goto out; | |
3570 | } | |
136e658d BF |
3571 | /* case 6 */ |
3572 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
e8f80c55 | 3573 | trace_nfsd_clid_confirmed_r(conf); |
136e658d | 3574 | goto out_copy; |
0733d213 | 3575 | } |
136e658d | 3576 | if (!creds_match) { /* case 3 */ |
631fc9ea BF |
3577 | if (client_has_state(conf)) { |
3578 | status = nfserr_clid_inuse; | |
27787733 | 3579 | trace_nfsd_clid_cred_mismatch(conf, rqstp); |
0733d213 AA |
3580 | goto out; |
3581 | } | |
0733d213 AA |
3582 | goto out_new; |
3583 | } | |
136e658d | 3584 | if (verfs_match) { /* case 2 */ |
0f1ba0ef | 3585 | conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; |
e8f80c55 | 3586 | trace_nfsd_clid_confirmed_r(conf); |
136e658d BF |
3587 | goto out_copy; |
3588 | } | |
3589 | /* case 5, client reboot */ | |
744ea54c | 3590 | trace_nfsd_clid_verf_mismatch(conf, rqstp, &verf); |
3dbacee6 | 3591 | conf = NULL; |
136e658d | 3592 | goto out_new; |
6ddbbbfe MS |
3593 | } |
3594 | ||
2dbb269d | 3595 | if (update) { /* case 7 */ |
6ddbbbfe MS |
3596 | status = nfserr_noent; |
3597 | goto out; | |
0733d213 AA |
3598 | } |
3599 | ||
e8f80c55 | 3600 | unconf = find_unconfirmed_client_by_name(&exid->clname, nn); |
2dbb269d | 3601 | if (unconf) /* case 4, possible retry or client restart */ |
3dbacee6 | 3602 | unhash_client_locked(unconf); |
0733d213 | 3603 | |
e8f80c55 CL |
3604 | /* case 1, new owner ID */ |
3605 | trace_nfsd_clid_fresh(new); | |
3606 | ||
0733d213 | 3607 | out_new: |
fd699b8a JL |
3608 | if (conf) { |
3609 | status = mark_client_expired_locked(conf); | |
3610 | if (status) | |
3611 | goto out; | |
2958d2ee | 3612 | trace_nfsd_clid_replaced(&conf->cl_clientid); |
fd699b8a | 3613 | } |
4f540e29 | 3614 | new->cl_minorversion = cstate->minorversion; |
ed941643 AE |
3615 | new->cl_spo_must_allow.u.words[0] = exid->spo_must_allow[0]; |
3616 | new->cl_spo_must_allow.u.words[1] = exid->spo_must_allow[1]; | |
0733d213 | 3617 | |
e4469c6c CL |
3618 | /* Contrived initial CREATE_SESSION response */ |
3619 | new->cl_cs_slot.sl_status = nfserr_seq_misordered; | |
3620 | ||
ac55fdc4 | 3621 | add_to_unconfirmed(new); |
3dbacee6 | 3622 | swap(new, conf); |
0733d213 | 3623 | out_copy: |
5cc40fd7 TM |
3624 | exid->clientid.cl_boot = conf->cl_clientid.cl_boot; |
3625 | exid->clientid.cl_id = conf->cl_clientid.cl_id; | |
0733d213 | 3626 | |
5cc40fd7 TM |
3627 | exid->seqid = conf->cl_cs_slot.sl_seqid + 1; |
3628 | nfsd4_set_ex_flags(conf, exid); | |
0733d213 AA |
3629 | |
3630 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
5cc40fd7 | 3631 | conf->cl_cs_slot.sl_seqid, conf->cl_exchange_flags); |
0733d213 AA |
3632 | status = nfs_ok; |
3633 | ||
3634 | out: | |
3dbacee6 | 3635 | spin_unlock(&nn->client_lock); |
50c7b948 | 3636 | out_nolock: |
5cc40fd7 | 3637 | if (new) |
3dbacee6 | 3638 | expire_client(new); |
e8f80c55 CL |
3639 | if (unconf) { |
3640 | trace_nfsd_clid_expire_unconf(&unconf->cl_clientid); | |
3dbacee6 | 3641 | expire_client(unconf); |
e8f80c55 | 3642 | } |
0733d213 | 3643 | return status; |
069b6ad4 AA |
3644 | } |
3645 | ||
57b7b43b | 3646 | static __be32 |
88e588d5 | 3647 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 3648 | { |
88e588d5 AA |
3649 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
3650 | slot_seqid); | |
b85d4c01 BH |
3651 | |
3652 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
3653 | if (slot_inuse) { |
3654 | if (seqid == slot_seqid) | |
b85d4c01 BH |
3655 | return nfserr_jukebox; |
3656 | else | |
3657 | return nfserr_seq_misordered; | |
3658 | } | |
f6d82485 | 3659 | /* Note unsigned 32-bit arithmetic handles wraparound: */ |
88e588d5 | 3660 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 | 3661 | return nfs_ok; |
88e588d5 | 3662 | if (seqid == slot_seqid) |
b85d4c01 | 3663 | return nfserr_replay_cache; |
b85d4c01 BH |
3664 | return nfserr_seq_misordered; |
3665 | } | |
3666 | ||
49557cc7 AA |
3667 | /* |
3668 | * Cache the create session result into the create session single DRC | |
3669 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
3670 | * Do this for solo or embedded create session operations. | |
3671 | */ | |
3672 | static void | |
3673 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
57b7b43b | 3674 | struct nfsd4_clid_slot *slot, __be32 nfserr) |
49557cc7 AA |
3675 | { |
3676 | slot->sl_status = nfserr; | |
3677 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
3678 | } | |
3679 | ||
3680 | static __be32 | |
3681 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
3682 | struct nfsd4_clid_slot *slot) | |
3683 | { | |
3684 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
3685 | return slot->sl_status; | |
3686 | } | |
3687 | ||
1b74c25b MJ |
3688 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
3689 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
3690 | 1 + /* MIN tag is length with zero, only length */ \ | |
3691 | 3 + /* version, opcount, opcode */ \ | |
3692 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
3693 | /* seqid, slotID, slotID, cache */ \ | |
3694 | 4 ) * sizeof(__be32)) | |
3695 | ||
3696 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
3697 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
3698 | 1 + /* status */ \ | |
3699 | 1 + /* MIN tag is length with zero, only length */ \ | |
3700 | 3 + /* opcount, opcode, opstatus*/ \ | |
3701 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
3702 | /* seqid, slotID, slotID, slotID, status */ \ | |
3703 | 5 ) * sizeof(__be32)) | |
3704 | ||
55c760cf | 3705 | static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs *ca, struct nfsd_net *nn) |
1b74c25b | 3706 | { |
55c760cf BF |
3707 | u32 maxrpc = nn->nfsd_serv->sv_max_mesg; |
3708 | ||
373cd409 BF |
3709 | if (ca->maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ) |
3710 | return nfserr_toosmall; | |
3711 | if (ca->maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ) | |
3712 | return nfserr_toosmall; | |
55c760cf BF |
3713 | ca->headerpadsz = 0; |
3714 | ca->maxreq_sz = min_t(u32, ca->maxreq_sz, maxrpc); | |
3715 | ca->maxresp_sz = min_t(u32, ca->maxresp_sz, maxrpc); | |
3716 | ca->maxops = min_t(u32, ca->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
3717 | ca->maxresp_cached = min_t(u32, ca->maxresp_cached, | |
3718 | NFSD_SLOT_CACHE_SIZE + NFSD_MIN_HDR_SEQ_SZ); | |
3719 | ca->maxreqs = min_t(u32, ca->maxreqs, NFSD_MAX_SLOTS_PER_SESSION); | |
3720 | /* | |
3721 | * Note decreasing slot size below client's request may make it | |
3722 | * difficult for client to function correctly, whereas | |
3723 | * decreasing the number of slots will (just?) affect | |
3724 | * performance. When short on memory we therefore prefer to | |
3725 | * decrease number of slots instead of their size. Clients that | |
3726 | * request larger slots than they need will get poor results: | |
7f49fd5d N |
3727 | * Note that we always allow at least one slot, because our |
3728 | * accounting is soft and provides no guarantees either way. | |
55c760cf | 3729 | */ |
2030ca56 | 3730 | ca->maxreqs = nfsd4_get_drc_mem(ca, nn); |
55c760cf | 3731 | |
373cd409 | 3732 | return nfs_ok; |
1b74c25b MJ |
3733 | } |
3734 | ||
4500632f CL |
3735 | /* |
3736 | * Server's NFSv4.1 backchannel support is AUTH_SYS-only for now. | |
3737 | * These are based on similar macros in linux/sunrpc/msg_prot.h . | |
3738 | */ | |
3739 | #define RPC_MAX_HEADER_WITH_AUTH_SYS \ | |
3740 | (RPC_CALLHDRSIZE + 2 * (2 + UNX_CALLSLACK)) | |
3741 | ||
3742 | #define RPC_MAX_REPHEADER_WITH_AUTH_SYS \ | |
3743 | (RPC_REPHDRSIZE + (2 + NUL_REPLYSLACK)) | |
3744 | ||
8a891633 | 3745 | #define NFSD_CB_MAX_REQ_SZ ((NFS4_enc_cb_recall_sz + \ |
4500632f | 3746 | RPC_MAX_HEADER_WITH_AUTH_SYS) * sizeof(__be32)) |
8a891633 | 3747 | #define NFSD_CB_MAX_RESP_SZ ((NFS4_dec_cb_recall_sz + \ |
4500632f CL |
3748 | RPC_MAX_REPHEADER_WITH_AUTH_SYS) * \ |
3749 | sizeof(__be32)) | |
8a891633 | 3750 | |
06b332a5 | 3751 | static __be32 check_backchannel_attrs(struct nfsd4_channel_attrs *ca) |
1b74c25b | 3752 | { |
06b332a5 BF |
3753 | ca->headerpadsz = 0; |
3754 | ||
8a891633 | 3755 | if (ca->maxreq_sz < NFSD_CB_MAX_REQ_SZ) |
06b332a5 | 3756 | return nfserr_toosmall; |
8a891633 | 3757 | if (ca->maxresp_sz < NFSD_CB_MAX_RESP_SZ) |
06b332a5 BF |
3758 | return nfserr_toosmall; |
3759 | ca->maxresp_cached = 0; | |
3760 | if (ca->maxops < 2) | |
3761 | return nfserr_toosmall; | |
3762 | ||
3763 | return nfs_ok; | |
1b74c25b MJ |
3764 | } |
3765 | ||
b78724b7 BF |
3766 | static __be32 nfsd4_check_cb_sec(struct nfsd4_cb_sec *cbs) |
3767 | { | |
3768 | switch (cbs->flavor) { | |
3769 | case RPC_AUTH_NULL: | |
3770 | case RPC_AUTH_UNIX: | |
3771 | return nfs_ok; | |
3772 | default: | |
3773 | /* | |
3774 | * GSS case: the spec doesn't allow us to return this | |
3775 | * error. But it also doesn't allow us not to support | |
3776 | * GSS. | |
3777 | * I'd rather this fail hard than return some error the | |
3778 | * client might think it can already handle: | |
3779 | */ | |
3780 | return nfserr_encr_alg_unsupp; | |
3781 | } | |
3782 | } | |
3783 | ||
069b6ad4 AA |
3784 | __be32 |
3785 | nfsd4_create_session(struct svc_rqst *rqstp, | |
eb69853d | 3786 | struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) |
069b6ad4 | 3787 | { |
eb69853d | 3788 | struct nfsd4_create_session *cr_ses = &u->create_session; |
363168b4 | 3789 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 3790 | struct nfs4_client *conf, *unconf; |
e4469c6c | 3791 | struct nfsd4_clid_slot *cs_slot; |
d20c11d8 | 3792 | struct nfs4_client *old = NULL; |
ac7c46f2 | 3793 | struct nfsd4_session *new; |
81f0b2a4 | 3794 | struct nfsd4_conn *conn; |
57b7b43b | 3795 | __be32 status = 0; |
8daae4dc | 3796 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
ec6b5d7b | 3797 | |
a62573dc MJ |
3798 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
3799 | return nfserr_inval; | |
b78724b7 BF |
3800 | status = nfsd4_check_cb_sec(&cr_ses->cb_sec); |
3801 | if (status) | |
3802 | return status; | |
55c760cf | 3803 | status = check_forechannel_attrs(&cr_ses->fore_channel, nn); |
06b332a5 BF |
3804 | if (status) |
3805 | return status; | |
3806 | status = check_backchannel_attrs(&cr_ses->back_channel); | |
373cd409 | 3807 | if (status) |
f403e450 | 3808 | goto out_release_drc_mem; |
81f0b2a4 | 3809 | status = nfserr_jukebox; |
60810e54 | 3810 | new = alloc_session(&cr_ses->fore_channel, &cr_ses->back_channel); |
55c760cf BF |
3811 | if (!new) |
3812 | goto out_release_drc_mem; | |
81f0b2a4 BF |
3813 | conn = alloc_conn_from_crses(rqstp, cr_ses); |
3814 | if (!conn) | |
3815 | goto out_free_session; | |
a62573dc | 3816 | |
d20c11d8 | 3817 | spin_lock(&nn->client_lock); |
b910544a CL |
3818 | |
3819 | /* RFC 8881 Section 18.36.4 Phase 1: Client record look-up. */ | |
0a7ec377 | 3820 | unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn); |
8daae4dc | 3821 | conf = find_confirmed_client(&cr_ses->clientid, true, nn); |
e4469c6c CL |
3822 | if (!conf && !unconf) { |
3823 | status = nfserr_stale_clientid; | |
3824 | goto out_free_conn; | |
3825 | } | |
ec6b5d7b | 3826 | |
b910544a | 3827 | /* RFC 8881 Section 18.36.4 Phase 2: Sequence ID processing. */ |
e4469c6c | 3828 | if (conf) |
49557cc7 | 3829 | cs_slot = &conf->cl_cs_slot; |
e4469c6c CL |
3830 | else |
3831 | cs_slot = &unconf->cl_cs_slot; | |
3832 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
3833 | if (status) { | |
3834 | if (status == nfserr_replay_cache) { | |
3835 | status = nfsd4_replay_create_session(cr_ses, cs_slot); | |
81f0b2a4 | 3836 | goto out_free_conn; |
ec6b5d7b | 3837 | } |
e4469c6c CL |
3838 | goto out_cache_error; |
3839 | } | |
3840 | cs_slot->sl_seqid++; | |
3841 | cr_ses->seqid = cs_slot->sl_seqid; | |
3842 | ||
b910544a | 3843 | /* RFC 8881 Section 18.36.4 Phase 3: Client ID confirmation. */ |
e4469c6c CL |
3844 | if (conf) { |
3845 | status = nfserr_wrong_cred; | |
3846 | if (!nfsd4_mach_creds_match(conf, rqstp)) | |
3847 | goto out_cache_error; | |
3848 | } else { | |
27787733 | 3849 | status = nfserr_clid_inuse; |
ec6b5d7b | 3850 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || |
363168b4 | 3851 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
27787733 | 3852 | trace_nfsd_clid_cred_mismatch(unconf, rqstp); |
e4469c6c | 3853 | goto out_cache_error; |
ec6b5d7b | 3854 | } |
57266a6e | 3855 | status = nfserr_wrong_cred; |
dedeb13f | 3856 | if (!nfsd4_mach_creds_match(unconf, rqstp)) |
e4469c6c | 3857 | goto out_cache_error; |
382a62e7 | 3858 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
221a6876 | 3859 | if (old) { |
d20c11d8 | 3860 | status = mark_client_expired_locked(old); |
7abea1e8 JL |
3861 | if (status) { |
3862 | old = NULL; | |
e4469c6c | 3863 | goto out_cache_error; |
7abea1e8 | 3864 | } |
2958d2ee | 3865 | trace_nfsd_clid_replaced(&old->cl_clientid); |
221a6876 | 3866 | } |
8f9d3d3b | 3867 | move_to_confirmed(unconf); |
ec6b5d7b | 3868 | conf = unconf; |
ec6b5d7b | 3869 | } |
b910544a CL |
3870 | |
3871 | /* RFC 8881 Section 18.36.4 Phase 4: Session creation. */ | |
81f0b2a4 | 3872 | status = nfs_ok; |
4ce85c8c | 3873 | /* Persistent sessions are not supported */ |
408b79bc | 3874 | cr_ses->flags &= ~SESSION4_PERSIST; |
4ce85c8c | 3875 | /* Upshifting from TCP to RDMA is not supported */ |
408b79bc BF |
3876 | cr_ses->flags &= ~SESSION4_RDMA; |
3877 | ||
81f0b2a4 | 3878 | init_session(rqstp, new, conf, cr_ses); |
d20c11d8 | 3879 | nfsd4_get_session_locked(new); |
81f0b2a4 | 3880 | |
ac7c46f2 | 3881 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, |
ec6b5d7b | 3882 | NFS4_MAX_SESSIONID_LEN); |
ec6b5d7b | 3883 | |
d20c11d8 | 3884 | /* cache solo and embedded create sessions under the client_lock */ |
49557cc7 | 3885 | nfsd4_cache_create_session(cr_ses, cs_slot, status); |
d20c11d8 | 3886 | spin_unlock(&nn->client_lock); |
934bd07f BF |
3887 | if (conf == unconf) |
3888 | fsnotify_dentry(conf->cl_nfsd_info_dentry, FS_MODIFY); | |
d20c11d8 JL |
3889 | /* init connection and backchannel */ |
3890 | nfsd4_init_conn(rqstp, conn, new); | |
3891 | nfsd4_put_session(new); | |
d20c11d8 JL |
3892 | if (old) |
3893 | expire_client(old); | |
ec6b5d7b | 3894 | return status; |
e4469c6c CL |
3895 | |
3896 | out_cache_error: | |
3897 | nfsd4_cache_create_session(cr_ses, cs_slot, status); | |
81f0b2a4 | 3898 | out_free_conn: |
d20c11d8 | 3899 | spin_unlock(&nn->client_lock); |
81f0b2a4 | 3900 | free_conn(conn); |
d20c11d8 JL |
3901 | if (old) |
3902 | expire_client(old); | |
81f0b2a4 BF |
3903 | out_free_session: |
3904 | __free_session(new); | |
55c760cf BF |
3905 | out_release_drc_mem: |
3906 | nfsd4_put_drc_mem(&cr_ses->fore_channel); | |
1ca50792 | 3907 | return status; |
069b6ad4 AA |
3908 | } |
3909 | ||
1d1bc8f2 BF |
3910 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
3911 | { | |
3912 | switch (*dir) { | |
3913 | case NFS4_CDFC4_FORE: | |
3914 | case NFS4_CDFC4_BACK: | |
3915 | return nfs_ok; | |
3916 | case NFS4_CDFC4_FORE_OR_BOTH: | |
3917 | case NFS4_CDFC4_BACK_OR_BOTH: | |
3918 | *dir = NFS4_CDFC4_BOTH; | |
3919 | return nfs_ok; | |
fc5fc5d7 | 3920 | } |
1d1bc8f2 BF |
3921 | return nfserr_inval; |
3922 | } | |
3923 | ||
eb69853d CH |
3924 | __be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, |
3925 | struct nfsd4_compound_state *cstate, | |
3926 | union nfsd4_op_u *u) | |
cb73a9f4 | 3927 | { |
eb69853d | 3928 | struct nfsd4_backchannel_ctl *bc = &u->backchannel_ctl; |
cb73a9f4 | 3929 | struct nfsd4_session *session = cstate->session; |
c9a49628 | 3930 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
b78724b7 | 3931 | __be32 status; |
cb73a9f4 | 3932 | |
b78724b7 BF |
3933 | status = nfsd4_check_cb_sec(&bc->bc_cb_sec); |
3934 | if (status) | |
3935 | return status; | |
c9a49628 | 3936 | spin_lock(&nn->client_lock); |
cb73a9f4 BF |
3937 | session->se_cb_prog = bc->bc_cb_program; |
3938 | session->se_cb_sec = bc->bc_cb_sec; | |
c9a49628 | 3939 | spin_unlock(&nn->client_lock); |
cb73a9f4 BF |
3940 | |
3941 | nfsd4_probe_callback(session->se_client); | |
3942 | ||
3943 | return nfs_ok; | |
3944 | } | |
3945 | ||
c2d715a1 BF |
3946 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
3947 | { | |
3948 | struct nfsd4_conn *c; | |
3949 | ||
3950 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
3951 | if (c->cn_xprt == xpt) { | |
3952 | return c; | |
3953 | } | |
3954 | } | |
3955 | return NULL; | |
3956 | } | |
3957 | ||
3958 | static __be32 nfsd4_match_existing_connection(struct svc_rqst *rqst, | |
02579b2f | 3959 | struct nfsd4_session *session, u32 req, struct nfsd4_conn **conn) |
c2d715a1 BF |
3960 | { |
3961 | struct nfs4_client *clp = session->se_client; | |
3962 | struct svc_xprt *xpt = rqst->rq_xprt; | |
3963 | struct nfsd4_conn *c; | |
3964 | __be32 status; | |
3965 | ||
3966 | /* Following the last paragraph of RFC 5661 Section 18.34.3: */ | |
3967 | spin_lock(&clp->cl_lock); | |
3968 | c = __nfsd4_find_conn(xpt, session); | |
3969 | if (!c) | |
3970 | status = nfserr_noent; | |
3971 | else if (req == c->cn_flags) | |
3972 | status = nfs_ok; | |
3973 | else if (req == NFS4_CDFC4_FORE_OR_BOTH && | |
3974 | c->cn_flags != NFS4_CDFC4_BACK) | |
3975 | status = nfs_ok; | |
3976 | else if (req == NFS4_CDFC4_BACK_OR_BOTH && | |
3977 | c->cn_flags != NFS4_CDFC4_FORE) | |
3978 | status = nfs_ok; | |
3979 | else | |
3980 | status = nfserr_inval; | |
3981 | spin_unlock(&clp->cl_lock); | |
02579b2f DN |
3982 | if (status == nfs_ok && conn) |
3983 | *conn = c; | |
c2d715a1 BF |
3984 | return status; |
3985 | } | |
3986 | ||
1d1bc8f2 BF |
3987 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, |
3988 | struct nfsd4_compound_state *cstate, | |
eb69853d | 3989 | union nfsd4_op_u *u) |
1d1bc8f2 | 3990 | { |
eb69853d | 3991 | struct nfsd4_bind_conn_to_session *bcts = &u->bind_conn_to_session; |
1d1bc8f2 | 3992 | __be32 status; |
3ba63671 | 3993 | struct nfsd4_conn *conn; |
4f6e6c17 | 3994 | struct nfsd4_session *session; |
d4e19e70 TM |
3995 | struct net *net = SVC_NET(rqstp); |
3996 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1d1bc8f2 BF |
3997 | |
3998 | if (!nfsd4_last_compound_op(rqstp)) | |
3999 | return nfserr_not_only_op; | |
c9a49628 | 4000 | spin_lock(&nn->client_lock); |
d4e19e70 | 4001 | session = find_in_sessionid_hashtbl(&bcts->sessionid, net, &status); |
c9a49628 | 4002 | spin_unlock(&nn->client_lock); |
4f6e6c17 | 4003 | if (!session) |
d4e19e70 | 4004 | goto out_no_session; |
57266a6e | 4005 | status = nfserr_wrong_cred; |
dedeb13f | 4006 | if (!nfsd4_mach_creds_match(session->se_client, rqstp)) |
57266a6e | 4007 | goto out; |
02579b2f DN |
4008 | status = nfsd4_match_existing_connection(rqstp, session, |
4009 | bcts->dir, &conn); | |
4010 | if (status == nfs_ok) { | |
4011 | if (bcts->dir == NFS4_CDFC4_FORE_OR_BOTH || | |
4012 | bcts->dir == NFS4_CDFC4_BACK) | |
4013 | conn->cn_flags |= NFS4_CDFC4_BACK; | |
4014 | nfsd4_probe_callback(session->se_client); | |
4015 | goto out; | |
4016 | } | |
4017 | if (status == nfserr_inval) | |
c2d715a1 | 4018 | goto out; |
1d1bc8f2 | 4019 | status = nfsd4_map_bcts_dir(&bcts->dir); |
3ba63671 | 4020 | if (status) |
4f6e6c17 | 4021 | goto out; |
3ba63671 | 4022 | conn = alloc_conn(rqstp, bcts->dir); |
4f6e6c17 | 4023 | status = nfserr_jukebox; |
3ba63671 | 4024 | if (!conn) |
4f6e6c17 BF |
4025 | goto out; |
4026 | nfsd4_init_conn(rqstp, conn, session); | |
4027 | status = nfs_ok; | |
4028 | out: | |
d4e19e70 TM |
4029 | nfsd4_put_session(session); |
4030 | out_no_session: | |
4f6e6c17 | 4031 | return status; |
1d1bc8f2 BF |
4032 | } |
4033 | ||
665d5072 | 4034 | static bool nfsd4_compound_in_session(struct nfsd4_compound_state *cstate, struct nfs4_sessionid *sid) |
5d4cec2f | 4035 | { |
665d5072 | 4036 | if (!cstate->session) |
51d87bc2 | 4037 | return false; |
665d5072 | 4038 | return !memcmp(sid, &cstate->session->se_sessionid, sizeof(*sid)); |
5d4cec2f BF |
4039 | } |
4040 | ||
069b6ad4 | 4041 | __be32 |
eb69853d CH |
4042 | nfsd4_destroy_session(struct svc_rqst *r, struct nfsd4_compound_state *cstate, |
4043 | union nfsd4_op_u *u) | |
069b6ad4 | 4044 | { |
ca0552f4 | 4045 | struct nfs4_sessionid *sessionid = &u->destroy_session.sessionid; |
e10e0cfc | 4046 | struct nfsd4_session *ses; |
abcdff09 | 4047 | __be32 status; |
f0f51f5c | 4048 | int ref_held_by_me = 0; |
d4e19e70 TM |
4049 | struct net *net = SVC_NET(r); |
4050 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
e10e0cfc | 4051 | |
abcdff09 | 4052 | status = nfserr_not_only_op; |
ca0552f4 | 4053 | if (nfsd4_compound_in_session(cstate, sessionid)) { |
57716355 | 4054 | if (!nfsd4_last_compound_op(r)) |
abcdff09 | 4055 | goto out; |
f0f51f5c | 4056 | ref_held_by_me++; |
57716355 | 4057 | } |
ca0552f4 | 4058 | dump_sessionid(__func__, sessionid); |
c9a49628 | 4059 | spin_lock(&nn->client_lock); |
ca0552f4 | 4060 | ses = find_in_sessionid_hashtbl(sessionid, net, &status); |
abcdff09 BF |
4061 | if (!ses) |
4062 | goto out_client_lock; | |
57266a6e | 4063 | status = nfserr_wrong_cred; |
dedeb13f | 4064 | if (!nfsd4_mach_creds_match(ses->se_client, r)) |
d4e19e70 | 4065 | goto out_put_session; |
f0f51f5c | 4066 | status = mark_session_dead_locked(ses, 1 + ref_held_by_me); |
66b2b9b2 | 4067 | if (status) |
f0f51f5c | 4068 | goto out_put_session; |
e10e0cfc | 4069 | unhash_session(ses); |
c9a49628 | 4070 | spin_unlock(&nn->client_lock); |
e10e0cfc | 4071 | |
84f5f7cc | 4072 | nfsd4_probe_callback_sync(ses->se_client); |
19cf5c02 | 4073 | |
c9a49628 | 4074 | spin_lock(&nn->client_lock); |
e10e0cfc | 4075 | status = nfs_ok; |
f0f51f5c | 4076 | out_put_session: |
d4e19e70 | 4077 | nfsd4_put_session_locked(ses); |
abcdff09 BF |
4078 | out_client_lock: |
4079 | spin_unlock(&nn->client_lock); | |
e10e0cfc | 4080 | out: |
e10e0cfc | 4081 | return status; |
069b6ad4 AA |
4082 | } |
4083 | ||
57266a6e | 4084 | static __be32 nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
4085 | { |
4086 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 4087 | struct nfsd4_conn *c; |
57266a6e | 4088 | __be32 status = nfs_ok; |
21b75b01 | 4089 | int ret; |
328ead28 BF |
4090 | |
4091 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 4092 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
57266a6e BF |
4093 | if (c) |
4094 | goto out_free; | |
4095 | status = nfserr_conn_not_bound_to_session; | |
4096 | if (clp->cl_mach_cred) | |
4097 | goto out_free; | |
328ead28 BF |
4098 | __nfsd4_hash_conn(new, ses); |
4099 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
4100 | ret = nfsd4_register_conn(new); |
4101 | if (ret) | |
4102 | /* oops; xprt is already down: */ | |
4103 | nfsd4_conn_lost(&new->cn_xpt_user); | |
57266a6e BF |
4104 | return nfs_ok; |
4105 | out_free: | |
4106 | spin_unlock(&clp->cl_lock); | |
4107 | free_conn(new); | |
4108 | return status; | |
328ead28 BF |
4109 | } |
4110 | ||
868b89c3 MJ |
4111 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
4112 | { | |
4113 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
4114 | ||
4115 | return args->opcnt > session->se_fchannel.maxops; | |
4116 | } | |
4117 | ||
ae82a8d0 MJ |
4118 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
4119 | struct nfsd4_session *session) | |
4120 | { | |
4121 | struct xdr_buf *xb = &rqstp->rq_arg; | |
4122 | ||
4123 | return xb->len > session->se_fchannel.maxreq_sz; | |
4124 | } | |
4125 | ||
53da6a53 BF |
4126 | static bool replay_matches_cache(struct svc_rqst *rqstp, |
4127 | struct nfsd4_sequence *seq, struct nfsd4_slot *slot) | |
4128 | { | |
4129 | struct nfsd4_compoundargs *argp = rqstp->rq_argp; | |
4130 | ||
4131 | if ((bool)(slot->sl_flags & NFSD4_SLOT_CACHETHIS) != | |
4132 | (bool)seq->cachethis) | |
4133 | return false; | |
4134 | /* | |
6e73e92b SM |
4135 | * If there's an error then the reply can have fewer ops than |
4136 | * the call. | |
53da6a53 | 4137 | */ |
6e73e92b SM |
4138 | if (slot->sl_opcnt < argp->opcnt && !slot->sl_status) |
4139 | return false; | |
4140 | /* | |
4141 | * But if we cached a reply with *more* ops than the call you're | |
4142 | * sending us now, then this new call is clearly not really a | |
4143 | * replay of the old one: | |
4144 | */ | |
4145 | if (slot->sl_opcnt > argp->opcnt) | |
53da6a53 BF |
4146 | return false; |
4147 | /* This is the only check explicitly called by spec: */ | |
4148 | if (!same_creds(&rqstp->rq_cred, &slot->sl_cred)) | |
4149 | return false; | |
4150 | /* | |
4151 | * There may be more comparisons we could actually do, but the | |
4152 | * spec doesn't require us to catch every case where the calls | |
4153 | * don't match (that would require caching the call as well as | |
4154 | * the reply), so we don't bother. | |
4155 | */ | |
4156 | return true; | |
4157 | } | |
4158 | ||
069b6ad4 | 4159 | __be32 |
eb69853d CH |
4160 | nfsd4_sequence(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4161 | union nfsd4_op_u *u) | |
069b6ad4 | 4162 | { |
eb69853d | 4163 | struct nfsd4_sequence *seq = &u->sequence; |
f9bb94c4 | 4164 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
bddfdbcd | 4165 | struct xdr_stream *xdr = resp->xdr; |
b85d4c01 | 4166 | struct nfsd4_session *session; |
221a6876 | 4167 | struct nfs4_client *clp; |
b85d4c01 | 4168 | struct nfsd4_slot *slot; |
a663bdd8 | 4169 | struct nfsd4_conn *conn; |
57b7b43b | 4170 | __be32 status; |
47ee5298 | 4171 | int buflen; |
d4e19e70 TM |
4172 | struct net *net = SVC_NET(rqstp); |
4173 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
b85d4c01 | 4174 | |
f9bb94c4 AA |
4175 | if (resp->opcnt != 1) |
4176 | return nfserr_sequence_pos; | |
4177 | ||
a663bdd8 BF |
4178 | /* |
4179 | * Will be either used or freed by nfsd4_sequence_check_conn | |
4180 | * below. | |
4181 | */ | |
4182 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
4183 | if (!conn) | |
4184 | return nfserr_jukebox; | |
4185 | ||
c9a49628 | 4186 | spin_lock(&nn->client_lock); |
d4e19e70 | 4187 | session = find_in_sessionid_hashtbl(&seq->sessionid, net, &status); |
b85d4c01 | 4188 | if (!session) |
221a6876 BF |
4189 | goto out_no_session; |
4190 | clp = session->se_client; | |
b85d4c01 | 4191 | |
868b89c3 MJ |
4192 | status = nfserr_too_many_ops; |
4193 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
66b2b9b2 | 4194 | goto out_put_session; |
868b89c3 | 4195 | |
ae82a8d0 MJ |
4196 | status = nfserr_req_too_big; |
4197 | if (nfsd4_request_too_big(rqstp, session)) | |
66b2b9b2 | 4198 | goto out_put_session; |
ae82a8d0 | 4199 | |
b85d4c01 | 4200 | status = nfserr_badslot; |
6c18ba9f | 4201 | if (seq->slotid >= session->se_fchannel.maxreqs) |
66b2b9b2 | 4202 | goto out_put_session; |
b85d4c01 | 4203 | |
557ce264 | 4204 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
4205 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
4206 | ||
a8dfdaeb AA |
4207 | /* We do not negotiate the number of slots yet, so set the |
4208 | * maxslots to the session maxreqs which is used to encode | |
4209 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
4210 | seq->maxslots = session->se_fchannel.maxreqs; | |
4211 | ||
73e79482 BF |
4212 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, |
4213 | slot->sl_flags & NFSD4_SLOT_INUSE); | |
b85d4c01 | 4214 | if (status == nfserr_replay_cache) { |
bf5c43c8 BF |
4215 | status = nfserr_seq_misordered; |
4216 | if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) | |
66b2b9b2 | 4217 | goto out_put_session; |
53da6a53 BF |
4218 | status = nfserr_seq_false_retry; |
4219 | if (!replay_matches_cache(rqstp, seq, slot)) | |
4220 | goto out_put_session; | |
b85d4c01 BH |
4221 | cstate->slot = slot; |
4222 | cstate->session = session; | |
4b24ca7d | 4223 | cstate->clp = clp; |
da3846a2 | 4224 | /* Return the cached reply status and set cstate->status |
557ce264 | 4225 | * for nfsd4_proc_compound processing */ |
bf864a31 | 4226 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 4227 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 4228 | goto out; |
b85d4c01 BH |
4229 | } |
4230 | if (status) | |
66b2b9b2 | 4231 | goto out_put_session; |
b85d4c01 | 4232 | |
57266a6e | 4233 | status = nfsd4_sequence_check_conn(conn, session); |
a663bdd8 | 4234 | conn = NULL; |
57266a6e BF |
4235 | if (status) |
4236 | goto out_put_session; | |
328ead28 | 4237 | |
47ee5298 BF |
4238 | buflen = (seq->cachethis) ? |
4239 | session->se_fchannel.maxresp_cached : | |
4240 | session->se_fchannel.maxresp_sz; | |
4241 | status = (seq->cachethis) ? nfserr_rep_too_big_to_cache : | |
4242 | nfserr_rep_too_big; | |
a5cddc88 | 4243 | if (xdr_restrict_buflen(xdr, buflen - rqstp->rq_auth_slack)) |
47ee5298 | 4244 | goto out_put_session; |
32aaa62e | 4245 | svc_reserve(rqstp, buflen); |
47ee5298 BF |
4246 | |
4247 | status = nfs_ok; | |
b85d4c01 | 4248 | /* Success! bump slot seqid */ |
b85d4c01 | 4249 | slot->sl_seqid = seq->seqid; |
bf5c43c8 | 4250 | slot->sl_flags |= NFSD4_SLOT_INUSE; |
73e79482 BF |
4251 | if (seq->cachethis) |
4252 | slot->sl_flags |= NFSD4_SLOT_CACHETHIS; | |
bf5c43c8 BF |
4253 | else |
4254 | slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; | |
b85d4c01 BH |
4255 | |
4256 | cstate->slot = slot; | |
4257 | cstate->session = session; | |
4b24ca7d | 4258 | cstate->clp = clp; |
b85d4c01 | 4259 | |
b85d4c01 | 4260 | out: |
221a6876 BF |
4261 | switch (clp->cl_cb_state) { |
4262 | case NFSD4_CB_DOWN: | |
4263 | seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; | |
4264 | break; | |
4265 | case NFSD4_CB_FAULT: | |
4266 | seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; | |
4267 | break; | |
4268 | default: | |
4269 | seq->status_flags = 0; | |
aaf84eb9 | 4270 | } |
3bd64a5b BF |
4271 | if (!list_empty(&clp->cl_revoked)) |
4272 | seq->status_flags |= SEQ4_STATUS_RECALLABLE_STATE_REVOKED; | |
1ac3629b N |
4273 | if (atomic_read(&clp->cl_admin_revoked)) |
4274 | seq->status_flags |= SEQ4_STATUS_ADMIN_STATE_REVOKED; | |
f52f1975 | 4275 | trace_nfsd_seq4_status(rqstp, seq); |
221a6876 | 4276 | out_no_session: |
3f42d2c4 KM |
4277 | if (conn) |
4278 | free_conn(conn); | |
c9a49628 | 4279 | spin_unlock(&nn->client_lock); |
b85d4c01 | 4280 | return status; |
66b2b9b2 | 4281 | out_put_session: |
d4e19e70 | 4282 | nfsd4_put_session_locked(session); |
221a6876 | 4283 | goto out_no_session; |
069b6ad4 AA |
4284 | } |
4285 | ||
b607664e TM |
4286 | void |
4287 | nfsd4_sequence_done(struct nfsd4_compoundres *resp) | |
4288 | { | |
4289 | struct nfsd4_compound_state *cs = &resp->cstate; | |
4290 | ||
4291 | if (nfsd4_has_session(cs)) { | |
b607664e TM |
4292 | if (cs->status != nfserr_replay_cache) { |
4293 | nfsd4_store_cache_entry(resp); | |
4294 | cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE; | |
4295 | } | |
d4e19e70 | 4296 | /* Drop session reference that was taken in nfsd4_sequence() */ |
b607664e | 4297 | nfsd4_put_session(cs->session); |
4b24ca7d JL |
4298 | } else if (cs->clp) |
4299 | put_client_renew(cs->clp); | |
b607664e TM |
4300 | } |
4301 | ||
345c2842 | 4302 | __be32 |
eb69853d CH |
4303 | nfsd4_destroy_clientid(struct svc_rqst *rqstp, |
4304 | struct nfsd4_compound_state *cstate, | |
4305 | union nfsd4_op_u *u) | |
345c2842 | 4306 | { |
eb69853d | 4307 | struct nfsd4_destroy_clientid *dc = &u->destroy_clientid; |
6b10ad19 TM |
4308 | struct nfs4_client *conf, *unconf; |
4309 | struct nfs4_client *clp = NULL; | |
57b7b43b | 4310 | __be32 status = 0; |
8daae4dc | 4311 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
345c2842 | 4312 | |
6b10ad19 | 4313 | spin_lock(&nn->client_lock); |
0a7ec377 | 4314 | unconf = find_unconfirmed_client(&dc->clientid, true, nn); |
8daae4dc | 4315 | conf = find_confirmed_client(&dc->clientid, true, nn); |
78389046 | 4316 | WARN_ON_ONCE(conf && unconf); |
345c2842 MJ |
4317 | |
4318 | if (conf) { | |
c0293b01 | 4319 | if (client_has_state(conf)) { |
345c2842 MJ |
4320 | status = nfserr_clientid_busy; |
4321 | goto out; | |
4322 | } | |
fd699b8a JL |
4323 | status = mark_client_expired_locked(conf); |
4324 | if (status) | |
4325 | goto out; | |
6b10ad19 | 4326 | clp = conf; |
345c2842 MJ |
4327 | } else if (unconf) |
4328 | clp = unconf; | |
4329 | else { | |
4330 | status = nfserr_stale_clientid; | |
4331 | goto out; | |
4332 | } | |
dedeb13f | 4333 | if (!nfsd4_mach_creds_match(clp, rqstp)) { |
6b10ad19 | 4334 | clp = NULL; |
57266a6e BF |
4335 | status = nfserr_wrong_cred; |
4336 | goto out; | |
4337 | } | |
c41a9b7a | 4338 | trace_nfsd_clid_destroyed(&clp->cl_clientid); |
6b10ad19 | 4339 | unhash_client_locked(clp); |
345c2842 | 4340 | out: |
6b10ad19 | 4341 | spin_unlock(&nn->client_lock); |
6b10ad19 TM |
4342 | if (clp) |
4343 | expire_client(clp); | |
345c2842 MJ |
4344 | return status; |
4345 | } | |
4346 | ||
4dc6ec00 | 4347 | __be32 |
eb69853d CH |
4348 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, |
4349 | struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) | |
4dc6ec00 | 4350 | { |
eb69853d | 4351 | struct nfsd4_reclaim_complete *rc = &u->reclaim_complete; |
ec59659b | 4352 | struct nfs4_client *clp = cstate->clp; |
57b7b43b | 4353 | __be32 status = 0; |
bcecf1cc | 4354 | |
4dc6ec00 BF |
4355 | if (rc->rca_one_fs) { |
4356 | if (!cstate->current_fh.fh_dentry) | |
4357 | return nfserr_nofilehandle; | |
4358 | /* | |
4359 | * We don't take advantage of the rca_one_fs case. | |
4360 | * That's OK, it's optional, we can safely ignore it. | |
4361 | */ | |
d28c442f | 4362 | return nfs_ok; |
4dc6ec00 | 4363 | } |
bcecf1cc | 4364 | |
bcecf1cc | 4365 | status = nfserr_complete_already; |
ec59659b | 4366 | if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, &clp->cl_flags)) |
bcecf1cc MJ |
4367 | goto out; |
4368 | ||
4369 | status = nfserr_stale_clientid; | |
ec59659b | 4370 | if (is_client_expired(clp)) |
4dc6ec00 BF |
4371 | /* |
4372 | * The following error isn't really legal. | |
4373 | * But we only get here if the client just explicitly | |
4374 | * destroyed the client. Surely it no longer cares what | |
4375 | * error it gets back on an operation for the dead | |
4376 | * client. | |
4377 | */ | |
bcecf1cc MJ |
4378 | goto out; |
4379 | ||
4380 | status = nfs_ok; | |
cee8aa07 | 4381 | trace_nfsd_clid_reclaim_complete(&clp->cl_clientid); |
ec59659b BF |
4382 | nfsd4_client_record_create(clp); |
4383 | inc_reclaim_complete(clp); | |
bcecf1cc | 4384 | out: |
bcecf1cc | 4385 | return status; |
4dc6ec00 BF |
4386 | } |
4387 | ||
b37ad28b | 4388 | __be32 |
b591480b | 4389 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 4390 | union nfsd4_op_u *u) |
1da177e4 | 4391 | { |
eb69853d | 4392 | struct nfsd4_setclientid *setclid = &u->setclientid; |
a084daf5 | 4393 | struct xdr_netobj clname = setclid->se_name; |
1da177e4 | 4394 | nfs4_verifier clverifier = setclid->se_verf; |
3dbacee6 TM |
4395 | struct nfs4_client *conf, *new; |
4396 | struct nfs4_client *unconf = NULL; | |
b37ad28b | 4397 | __be32 status; |
c212cecf SK |
4398 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
4399 | ||
5cc40fd7 TM |
4400 | new = create_client(clname, rqstp, &clverifier); |
4401 | if (new == NULL) | |
4402 | return nfserr_jukebox; | |
3dbacee6 | 4403 | spin_lock(&nn->client_lock); |
382a62e7 | 4404 | conf = find_confirmed_client_by_name(&clname, nn); |
2b634821 | 4405 | if (conf && client_has_state(conf)) { |
1da177e4 | 4406 | status = nfserr_clid_inuse; |
e203d506 BF |
4407 | if (clp_used_exchangeid(conf)) |
4408 | goto out; | |
026722c2 | 4409 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
27787733 | 4410 | trace_nfsd_clid_cred_mismatch(conf, rqstp); |
1da177e4 LT |
4411 | goto out; |
4412 | } | |
1da177e4 | 4413 | } |
a99454aa | 4414 | unconf = find_unconfirmed_client_by_name(&clname, nn); |
8f930711 | 4415 | if (unconf) |
3dbacee6 | 4416 | unhash_client_locked(unconf); |
744ea54c CL |
4417 | if (conf) { |
4418 | if (same_verf(&conf->cl_verifier, &clverifier)) { | |
4419 | copy_clid(new, conf); | |
4420 | gen_confirm(new, nn); | |
4421 | } else | |
4422 | trace_nfsd_clid_verf_mismatch(conf, rqstp, | |
4423 | &clverifier); | |
237f91c8 CL |
4424 | } else |
4425 | trace_nfsd_clid_fresh(new); | |
8323c3b2 | 4426 | new->cl_minorversion = 0; |
6f3d772f | 4427 | gen_callback(new, setclid, rqstp); |
ac55fdc4 | 4428 | add_to_unconfirmed(new); |
1da177e4 LT |
4429 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
4430 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
4431 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
5cc40fd7 | 4432 | new = NULL; |
1da177e4 LT |
4433 | status = nfs_ok; |
4434 | out: | |
3dbacee6 | 4435 | spin_unlock(&nn->client_lock); |
5cc40fd7 TM |
4436 | if (new) |
4437 | free_client(new); | |
237f91c8 CL |
4438 | if (unconf) { |
4439 | trace_nfsd_clid_expire_unconf(&unconf->cl_clientid); | |
3dbacee6 | 4440 | expire_client(unconf); |
237f91c8 | 4441 | } |
1da177e4 LT |
4442 | return status; |
4443 | } | |
4444 | ||
b37ad28b | 4445 | __be32 |
b591480b | 4446 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
eb69853d CH |
4447 | struct nfsd4_compound_state *cstate, |
4448 | union nfsd4_op_u *u) | |
1da177e4 | 4449 | { |
eb69853d CH |
4450 | struct nfsd4_setclientid_confirm *setclientid_confirm = |
4451 | &u->setclientid_confirm; | |
21ab45a4 | 4452 | struct nfs4_client *conf, *unconf; |
d20c11d8 | 4453 | struct nfs4_client *old = NULL; |
1da177e4 LT |
4454 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
4455 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 4456 | __be32 status; |
7f2210fa | 4457 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4458 | |
2c142baa | 4459 | if (STALE_CLIENTID(clid, nn)) |
1da177e4 | 4460 | return nfserr_stale_clientid; |
21ab45a4 | 4461 | |
d20c11d8 | 4462 | spin_lock(&nn->client_lock); |
8daae4dc | 4463 | conf = find_confirmed_client(clid, false, nn); |
0a7ec377 | 4464 | unconf = find_unconfirmed_client(clid, false, nn); |
a186e767 | 4465 | /* |
8695b90a BF |
4466 | * We try hard to give out unique clientid's, so if we get an |
4467 | * attempt to confirm the same clientid with a different cred, | |
f984a7ce BF |
4468 | * the client may be buggy; this should never happen. |
4469 | * | |
4470 | * Nevertheless, RFC 7530 recommends INUSE for this case: | |
a186e767 | 4471 | */ |
f984a7ce | 4472 | status = nfserr_clid_inuse; |
27787733 CL |
4473 | if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { |
4474 | trace_nfsd_clid_cred_mismatch(unconf, rqstp); | |
8695b90a | 4475 | goto out; |
27787733 CL |
4476 | } |
4477 | if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) { | |
4478 | trace_nfsd_clid_cred_mismatch(conf, rqstp); | |
8695b90a | 4479 | goto out; |
27787733 | 4480 | } |
90d700b7 | 4481 | if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) { |
7d22fc11 | 4482 | if (conf && same_verf(&confirm, &conf->cl_confirm)) { |
1da177e4 | 4483 | status = nfs_ok; |
237f91c8 | 4484 | } else |
90d700b7 BF |
4485 | status = nfserr_stale_clientid; |
4486 | goto out; | |
4487 | } | |
4488 | status = nfs_ok; | |
237f91c8 | 4489 | if (conf) { |
d20c11d8 JL |
4490 | old = unconf; |
4491 | unhash_client_locked(old); | |
8695b90a | 4492 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
237f91c8 | 4493 | } else { |
d20c11d8 JL |
4494 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
4495 | if (old) { | |
2b634821 BF |
4496 | status = nfserr_clid_inuse; |
4497 | if (client_has_state(old) | |
4498 | && !same_creds(&unconf->cl_cred, | |
ab451ea9 DN |
4499 | &old->cl_cred)) { |
4500 | old = NULL; | |
2b634821 | 4501 | goto out; |
ab451ea9 | 4502 | } |
d20c11d8 | 4503 | status = mark_client_expired_locked(old); |
7abea1e8 JL |
4504 | if (status) { |
4505 | old = NULL; | |
221a6876 | 4506 | goto out; |
7abea1e8 | 4507 | } |
2958d2ee | 4508 | trace_nfsd_clid_replaced(&old->cl_clientid); |
221a6876 | 4509 | } |
8695b90a | 4510 | move_to_confirmed(unconf); |
d20c11d8 | 4511 | conf = unconf; |
08e8987c | 4512 | } |
d20c11d8 JL |
4513 | get_client_locked(conf); |
4514 | spin_unlock(&nn->client_lock); | |
934bd07f BF |
4515 | if (conf == unconf) |
4516 | fsnotify_dentry(conf->cl_nfsd_info_dentry, FS_MODIFY); | |
d20c11d8 JL |
4517 | nfsd4_probe_callback(conf); |
4518 | spin_lock(&nn->client_lock); | |
4519 | put_client_renew_locked(conf); | |
1da177e4 | 4520 | out: |
d20c11d8 JL |
4521 | spin_unlock(&nn->client_lock); |
4522 | if (old) | |
4523 | expire_client(old); | |
1da177e4 LT |
4524 | return status; |
4525 | } | |
4526 | ||
32513b40 BF |
4527 | static struct nfs4_file *nfsd4_alloc_file(void) |
4528 | { | |
4529 | return kmem_cache_alloc(file_slab, GFP_KERNEL); | |
4530 | } | |
4531 | ||
1da177e4 | 4532 | /* OPEN Share state helper functions */ |
950e0118 | 4533 | |
81a21fa3 CL |
4534 | static void nfsd4_file_init(const struct svc_fh *fh, struct nfs4_file *fp) |
4535 | { | |
818a34eb | 4536 | refcount_set(&fp->fi_ref, 1); |
1d31a253 | 4537 | spin_lock_init(&fp->fi_lock); |
32513b40 BF |
4538 | INIT_LIST_HEAD(&fp->fi_stateids); |
4539 | INIT_LIST_HEAD(&fp->fi_delegations); | |
8287f009 | 4540 | INIT_LIST_HEAD(&fp->fi_clnt_odstate); |
f9b60e22 | 4541 | fh_copy_shallow(&fp->fi_fhandle, &fh->fh_handle); |
0c637be8 | 4542 | fp->fi_deleg_file = NULL; |
32513b40 | 4543 | fp->fi_had_conflict = false; |
baeb4ff0 | 4544 | fp->fi_share_deny = 0; |
32513b40 BF |
4545 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); |
4546 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
a0ce4837 BF |
4547 | fp->fi_aliased = false; |
4548 | fp->fi_inode = d_inode(fh->fh_dentry); | |
9cf514cc CH |
4549 | #ifdef CONFIG_NFSD_PNFS |
4550 | INIT_LIST_HEAD(&fp->fi_lo_states); | |
c5c707f9 | 4551 | atomic_set(&fp->fi_lo_recalls, 0); |
9cf514cc | 4552 | #endif |
1da177e4 LT |
4553 | } |
4554 | ||
e8ff2a84 | 4555 | void |
1da177e4 LT |
4556 | nfsd4_free_slabs(void) |
4557 | { | |
9258a2d5 | 4558 | kmem_cache_destroy(client_slab); |
abf1135b CH |
4559 | kmem_cache_destroy(openowner_slab); |
4560 | kmem_cache_destroy(lockowner_slab); | |
4561 | kmem_cache_destroy(file_slab); | |
4562 | kmem_cache_destroy(stateid_slab); | |
4563 | kmem_cache_destroy(deleg_slab); | |
9258a2d5 | 4564 | kmem_cache_destroy(odstate_slab); |
e60d4398 | 4565 | } |
1da177e4 | 4566 | |
72083396 | 4567 | int |
e60d4398 N |
4568 | nfsd4_init_slabs(void) |
4569 | { | |
649e58d5 | 4570 | client_slab = KMEM_CACHE(nfs4_client, 0); |
9258a2d5 JL |
4571 | if (client_slab == NULL) |
4572 | goto out; | |
649e58d5 | 4573 | openowner_slab = KMEM_CACHE(nfs4_openowner, 0); |
fe0750e5 | 4574 | if (openowner_slab == NULL) |
9258a2d5 | 4575 | goto out_free_client_slab; |
649e58d5 | 4576 | lockowner_slab = KMEM_CACHE(nfs4_lockowner, 0); |
fe0750e5 | 4577 | if (lockowner_slab == NULL) |
abf1135b | 4578 | goto out_free_openowner_slab; |
649e58d5 | 4579 | file_slab = KMEM_CACHE(nfs4_file, 0); |
e60d4398 | 4580 | if (file_slab == NULL) |
abf1135b | 4581 | goto out_free_lockowner_slab; |
649e58d5 | 4582 | stateid_slab = KMEM_CACHE(nfs4_ol_stateid, 0); |
5ac049ac | 4583 | if (stateid_slab == NULL) |
abf1135b | 4584 | goto out_free_file_slab; |
649e58d5 | 4585 | deleg_slab = KMEM_CACHE(nfs4_delegation, 0); |
5b2d21c1 | 4586 | if (deleg_slab == NULL) |
abf1135b | 4587 | goto out_free_stateid_slab; |
649e58d5 | 4588 | odstate_slab = KMEM_CACHE(nfs4_clnt_odstate, 0); |
8287f009 SB |
4589 | if (odstate_slab == NULL) |
4590 | goto out_free_deleg_slab; | |
e60d4398 | 4591 | return 0; |
abf1135b | 4592 | |
8287f009 SB |
4593 | out_free_deleg_slab: |
4594 | kmem_cache_destroy(deleg_slab); | |
abf1135b CH |
4595 | out_free_stateid_slab: |
4596 | kmem_cache_destroy(stateid_slab); | |
4597 | out_free_file_slab: | |
4598 | kmem_cache_destroy(file_slab); | |
4599 | out_free_lockowner_slab: | |
4600 | kmem_cache_destroy(lockowner_slab); | |
4601 | out_free_openowner_slab: | |
4602 | kmem_cache_destroy(openowner_slab); | |
9258a2d5 JL |
4603 | out_free_client_slab: |
4604 | kmem_cache_destroy(client_slab); | |
abf1135b | 4605 | out: |
e60d4398 | 4606 | return -ENOMEM; |
1da177e4 LT |
4607 | } |
4608 | ||
7746b32f | 4609 | static unsigned long |
a1049eb4 | 4610 | nfsd4_state_shrinker_count(struct shrinker *shrink, struct shrink_control *sc) |
7746b32f | 4611 | { |
44df6f43 | 4612 | int count; |
d17452aa | 4613 | struct nfsd_net *nn = shrink->private_data; |
7746b32f | 4614 | |
44df6f43 DN |
4615 | count = atomic_read(&nn->nfsd_courtesy_clients); |
4616 | if (!count) | |
4617 | count = atomic_long_read(&num_delegations); | |
4618 | if (count) | |
7c24fa22 | 4619 | queue_work(laundry_wq, &nn->nfsd_shrinker_work); |
44df6f43 | 4620 | return (unsigned long)count; |
7746b32f DN |
4621 | } |
4622 | ||
4623 | static unsigned long | |
a1049eb4 | 4624 | nfsd4_state_shrinker_scan(struct shrinker *shrink, struct shrink_control *sc) |
7746b32f DN |
4625 | { |
4626 | return SHRINK_STOP; | |
4627 | } | |
4628 | ||
f385f7d2 | 4629 | void |
7746b32f | 4630 | nfsd4_init_leases_net(struct nfsd_net *nn) |
6867137e | 4631 | { |
4271c2c0 DN |
4632 | struct sysinfo si; |
4633 | u64 max_clients; | |
4634 | ||
6867137e DN |
4635 | nn->nfsd4_lease = 90; /* default lease time */ |
4636 | nn->nfsd4_grace = 90; | |
4637 | nn->somebody_reclaimed = false; | |
4638 | nn->track_reclaim_completes = false; | |
a251c17a JD |
4639 | nn->clverifier_counter = get_random_u32(); |
4640 | nn->clientid_base = get_random_u32(); | |
6867137e DN |
4641 | nn->clientid_counter = nn->clientid_base + 1; |
4642 | nn->s2s_cp_cl_id = nn->clientid_counter++; | |
0926c395 DN |
4643 | |
4644 | atomic_set(&nn->nfs4_client_count, 0); | |
4271c2c0 DN |
4645 | si_meminfo(&si); |
4646 | max_clients = (u64)si.totalram * si.mem_unit / (1024 * 1024 * 1024); | |
4647 | max_clients *= NFS4_CLIENTS_PER_GB; | |
4648 | nn->nfs4_max_clients = max_t(int, max_clients, NFS4_CLIENTS_PER_GB); | |
3a4ea23d DN |
4649 | |
4650 | atomic_set(&nn->nfsd_courtesy_clients, 0); | |
6867137e DN |
4651 | } |
4652 | ||
ff194bd9 | 4653 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 4654 | { |
ff194bd9 BF |
4655 | rp->rp_status = nfserr_serverfault; |
4656 | rp->rp_buflen = 0; | |
4657 | rp->rp_buf = rp->rp_ibuf; | |
58fb12e6 JL |
4658 | mutex_init(&rp->rp_mutex); |
4659 | } | |
4660 | ||
4661 | static void nfsd4_cstate_assign_replay(struct nfsd4_compound_state *cstate, | |
4662 | struct nfs4_stateowner *so) | |
4663 | { | |
4664 | if (!nfsd4_has_session(cstate)) { | |
4665 | mutex_lock(&so->so_replay.rp_mutex); | |
b5971afa | 4666 | cstate->replay_owner = nfs4_get_stateowner(so); |
58fb12e6 JL |
4667 | } |
4668 | } | |
4669 | ||
4670 | void nfsd4_cstate_clear_replay(struct nfsd4_compound_state *cstate) | |
4671 | { | |
4672 | struct nfs4_stateowner *so = cstate->replay_owner; | |
4673 | ||
4674 | if (so != NULL) { | |
4675 | cstate->replay_owner = NULL; | |
4676 | mutex_unlock(&so->so_replay.rp_mutex); | |
4677 | nfs4_put_stateowner(so); | |
4678 | } | |
1da177e4 LT |
4679 | } |
4680 | ||
fe0750e5 | 4681 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 4682 | { |
1da177e4 | 4683 | struct nfs4_stateowner *sop; |
1da177e4 | 4684 | |
fe0750e5 | 4685 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
4686 | if (!sop) |
4687 | return NULL; | |
4688 | ||
6f4859b8 | 4689 | xdr_netobj_dup(&sop->so_owner, owner, GFP_KERNEL); |
ff194bd9 | 4690 | if (!sop->so_owner.data) { |
fe0750e5 | 4691 | kmem_cache_free(slab, sop); |
1da177e4 | 4692 | return NULL; |
ff194bd9 | 4693 | } |
ff194bd9 | 4694 | |
ea1da636 | 4695 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 BF |
4696 | sop->so_client = clp; |
4697 | init_nfs4_replay(&sop->so_replay); | |
6b180f0b | 4698 | atomic_set(&sop->so_count, 1); |
ff194bd9 BF |
4699 | return sop; |
4700 | } | |
4701 | ||
fe0750e5 | 4702 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 | 4703 | { |
d4f0489f | 4704 | lockdep_assert_held(&clp->cl_lock); |
9b531137 | 4705 | |
d4f0489f TM |
4706 | list_add(&oo->oo_owner.so_strhash, |
4707 | &clp->cl_ownerstr_hashtbl[strhashval]); | |
fe0750e5 | 4708 | list_add(&oo->oo_perclient, &clp->cl_openowners); |
ff194bd9 BF |
4709 | } |
4710 | ||
8f4b54c5 JL |
4711 | static void nfs4_unhash_openowner(struct nfs4_stateowner *so) |
4712 | { | |
d4f0489f | 4713 | unhash_openowner_locked(openowner(so)); |
8f4b54c5 JL |
4714 | } |
4715 | ||
6b180f0b JL |
4716 | static void nfs4_free_openowner(struct nfs4_stateowner *so) |
4717 | { | |
4718 | struct nfs4_openowner *oo = openowner(so); | |
4719 | ||
4720 | kmem_cache_free(openowner_slab, oo); | |
4721 | } | |
4722 | ||
4723 | static const struct nfs4_stateowner_operations openowner_ops = { | |
8f4b54c5 JL |
4724 | .so_unhash = nfs4_unhash_openowner, |
4725 | .so_free = nfs4_free_openowner, | |
6b180f0b JL |
4726 | }; |
4727 | ||
7fc0564e AE |
4728 | static struct nfs4_ol_stateid * |
4729 | nfsd4_find_existing_open(struct nfs4_file *fp, struct nfsd4_open *open) | |
4730 | { | |
4731 | struct nfs4_ol_stateid *local, *ret = NULL; | |
4732 | struct nfs4_openowner *oo = open->op_openowner; | |
4733 | ||
4734 | lockdep_assert_held(&fp->fi_lock); | |
4735 | ||
4736 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { | |
4737 | /* ignore lock owners */ | |
4738 | if (local->st_stateowner->so_is_open_owner == 0) | |
4739 | continue; | |
15ca08d3 TM |
4740 | if (local->st_stateowner != &oo->oo_owner) |
4741 | continue; | |
3f29cc82 N |
4742 | if (local->st_stid.sc_type == SC_TYPE_OPEN && |
4743 | !local->st_stid.sc_status) { | |
7fc0564e | 4744 | ret = local; |
a15dfcd5 | 4745 | refcount_inc(&ret->st_stid.sc_count); |
7fc0564e AE |
4746 | break; |
4747 | } | |
4748 | } | |
4749 | return ret; | |
4750 | } | |
4751 | ||
d688d858 N |
4752 | static void nfsd4_drop_revoked_stid(struct nfs4_stid *s) |
4753 | __releases(&s->sc_client->cl_lock) | |
4754 | { | |
4755 | struct nfs4_client *cl = s->sc_client; | |
1c13bf9f N |
4756 | LIST_HEAD(reaplist); |
4757 | struct nfs4_ol_stateid *stp; | |
06efa667 | 4758 | struct nfs4_delegation *dp; |
1c13bf9f | 4759 | bool unhashed; |
d688d858 N |
4760 | |
4761 | switch (s->sc_type) { | |
39657c74 N |
4762 | case SC_TYPE_OPEN: |
4763 | stp = openlockstateid(s); | |
4764 | if (unhash_open_stateid(stp, &reaplist)) | |
4765 | put_ol_stateid_locked(stp, &reaplist); | |
4766 | spin_unlock(&cl->cl_lock); | |
4767 | free_ol_stateid_reaplist(&reaplist); | |
4768 | break; | |
1c13bf9f N |
4769 | case SC_TYPE_LOCK: |
4770 | stp = openlockstateid(s); | |
4771 | unhashed = unhash_lock_stateid(stp); | |
4772 | spin_unlock(&cl->cl_lock); | |
4773 | if (unhashed) | |
4774 | nfs4_put_stid(s); | |
4775 | break; | |
06efa667 N |
4776 | case SC_TYPE_DELEG: |
4777 | dp = delegstateid(s); | |
4778 | list_del_init(&dp->dl_recall_lru); | |
4779 | spin_unlock(&cl->cl_lock); | |
4780 | nfs4_put_stid(s); | |
4781 | break; | |
d688d858 N |
4782 | default: |
4783 | spin_unlock(&cl->cl_lock); | |
4784 | } | |
4785 | } | |
4786 | ||
4787 | static void nfsd40_drop_revoked_stid(struct nfs4_client *cl, | |
4788 | stateid_t *stid) | |
4789 | { | |
4790 | /* NFSv4.0 has no way for the client to tell the server | |
4791 | * that it can forget an admin-revoked stateid. | |
4792 | * So we keep it around until the first time that the | |
4793 | * client uses it, and drop it the first time | |
4794 | * nfserr_admin_revoked is returned. | |
4795 | * For v4.1 and later we wait until explicitly told | |
4796 | * to free the stateid. | |
4797 | */ | |
4798 | if (cl->cl_minorversion == 0) { | |
4799 | struct nfs4_stid *st; | |
4800 | ||
4801 | spin_lock(&cl->cl_lock); | |
4802 | st = find_stateid_locked(cl, stid); | |
4803 | if (st) | |
4804 | nfsd4_drop_revoked_stid(st); | |
4805 | else | |
4806 | spin_unlock(&cl->cl_lock); | |
4807 | } | |
4808 | } | |
4809 | ||
15ca08d3 TM |
4810 | static __be32 |
4811 | nfsd4_verify_open_stid(struct nfs4_stid *s) | |
4812 | { | |
4813 | __be32 ret = nfs_ok; | |
4814 | ||
1ac3629b N |
4815 | if (s->sc_status & SC_STATUS_ADMIN_REVOKED) |
4816 | ret = nfserr_admin_revoked; | |
4817 | else if (s->sc_status & SC_STATUS_REVOKED) | |
15ca08d3 | 4818 | ret = nfserr_deleg_revoked; |
3f29cc82 N |
4819 | else if (s->sc_status & SC_STATUS_CLOSED) |
4820 | ret = nfserr_bad_stateid; | |
15ca08d3 TM |
4821 | return ret; |
4822 | } | |
4823 | ||
4824 | /* Lock the stateid st_mutex, and deal with races with CLOSE */ | |
4825 | static __be32 | |
4826 | nfsd4_lock_ol_stateid(struct nfs4_ol_stateid *stp) | |
4827 | { | |
4828 | __be32 ret; | |
4829 | ||
4f34bd05 | 4830 | mutex_lock_nested(&stp->st_mutex, LOCK_STATEID_MUTEX); |
15ca08d3 | 4831 | ret = nfsd4_verify_open_stid(&stp->st_stid); |
d688d858 N |
4832 | if (ret == nfserr_admin_revoked) |
4833 | nfsd40_drop_revoked_stid(stp->st_stid.sc_client, | |
4834 | &stp->st_stid.sc_stateid); | |
4835 | ||
15ca08d3 TM |
4836 | if (ret != nfs_ok) |
4837 | mutex_unlock(&stp->st_mutex); | |
4838 | return ret; | |
4839 | } | |
4840 | ||
4841 | static struct nfs4_ol_stateid * | |
4842 | nfsd4_find_and_lock_existing_open(struct nfs4_file *fp, struct nfsd4_open *open) | |
4843 | { | |
4844 | struct nfs4_ol_stateid *stp; | |
4845 | for (;;) { | |
4846 | spin_lock(&fp->fi_lock); | |
4847 | stp = nfsd4_find_existing_open(fp, open); | |
4848 | spin_unlock(&fp->fi_lock); | |
4849 | if (!stp || nfsd4_lock_ol_stateid(stp) == nfs_ok) | |
4850 | break; | |
4851 | nfs4_put_stid(&stp->st_stid); | |
4852 | } | |
4853 | return stp; | |
4854 | } | |
4855 | ||
fe0750e5 | 4856 | static struct nfs4_openowner * |
13d6f66b | 4857 | alloc_init_open_stateowner(unsigned int strhashval, struct nfsd4_open *open, |
db24b3b4 JL |
4858 | struct nfsd4_compound_state *cstate) |
4859 | { | |
13d6f66b | 4860 | struct nfs4_client *clp = cstate->clp; |
7ffb5880 | 4861 | struct nfs4_openowner *oo, *ret; |
ff194bd9 | 4862 | |
fe0750e5 BF |
4863 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
4864 | if (!oo) | |
ff194bd9 | 4865 | return NULL; |
6b180f0b | 4866 | oo->oo_owner.so_ops = &openowner_ops; |
fe0750e5 BF |
4867 | oo->oo_owner.so_is_open_owner = 1; |
4868 | oo->oo_owner.so_seqid = open->op_seqid; | |
d3134b10 | 4869 | oo->oo_flags = 0; |
db24b3b4 JL |
4870 | if (nfsd4_has_session(cstate)) |
4871 | oo->oo_flags |= NFS4_OO_CONFIRMED; | |
fe0750e5 | 4872 | oo->oo_time = 0; |
38c387b5 | 4873 | oo->oo_last_closed_stid = NULL; |
fe0750e5 | 4874 | INIT_LIST_HEAD(&oo->oo_close_lru); |
d4f0489f TM |
4875 | spin_lock(&clp->cl_lock); |
4876 | ret = find_openstateowner_str_locked(strhashval, open, clp); | |
7ffb5880 TM |
4877 | if (ret == NULL) { |
4878 | hash_openowner(oo, clp, strhashval); | |
4879 | ret = oo; | |
4880 | } else | |
d50ffded KM |
4881 | nfs4_free_stateowner(&oo->oo_owner); |
4882 | ||
d4f0489f | 4883 | spin_unlock(&clp->cl_lock); |
c5952338 | 4884 | return ret; |
1da177e4 LT |
4885 | } |
4886 | ||
7fc0564e | 4887 | static struct nfs4_ol_stateid * |
8c7245ab | 4888 | init_open_stateid(struct nfs4_file *fp, struct nfsd4_open *open) |
7fc0564e AE |
4889 | { |
4890 | ||
fe0750e5 | 4891 | struct nfs4_openowner *oo = open->op_openowner; |
7fc0564e | 4892 | struct nfs4_ol_stateid *retstp = NULL; |
8c7245ab | 4893 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4894 | |
8c7245ab | 4895 | stp = open->op_stp; |
5cc1fb2a OD |
4896 | /* We are moving these outside of the spinlocks to avoid the warnings */ |
4897 | mutex_init(&stp->st_mutex); | |
4f34bd05 | 4898 | mutex_lock_nested(&stp->st_mutex, OPEN_STATEID_MUTEX); |
5cc1fb2a | 4899 | |
15ca08d3 | 4900 | retry: |
7fc0564e AE |
4901 | spin_lock(&oo->oo_owner.so_client->cl_lock); |
4902 | spin_lock(&fp->fi_lock); | |
4903 | ||
4904 | retstp = nfsd4_find_existing_open(fp, open); | |
4905 | if (retstp) | |
4906 | goto out_unlock; | |
8c7245ab OD |
4907 | |
4908 | open->op_stp = NULL; | |
a15dfcd5 | 4909 | refcount_inc(&stp->st_stid.sc_count); |
3f29cc82 | 4910 | stp->st_stid.sc_type = SC_TYPE_OPEN; |
3c87b9b7 | 4911 | INIT_LIST_HEAD(&stp->st_locks); |
b5971afa | 4912 | stp->st_stateowner = nfs4_get_stateowner(&oo->oo_owner); |
13cd2184 | 4913 | get_nfs4_file(fp); |
11b9164a | 4914 | stp->st_stid.sc_file = fp; |
1da177e4 LT |
4915 | stp->st_access_bmap = 0; |
4916 | stp->st_deny_bmap = 0; | |
4c4cd222 | 4917 | stp->st_openstp = NULL; |
1c755dc1 | 4918 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); |
1d31a253 | 4919 | list_add(&stp->st_perfile, &fp->fi_stateids); |
7fc0564e AE |
4920 | |
4921 | out_unlock: | |
1d31a253 | 4922 | spin_unlock(&fp->fi_lock); |
1c755dc1 | 4923 | spin_unlock(&oo->oo_owner.so_client->cl_lock); |
5cc1fb2a | 4924 | if (retstp) { |
15ca08d3 TM |
4925 | /* Handle races with CLOSE */ |
4926 | if (nfsd4_lock_ol_stateid(retstp) != nfs_ok) { | |
4927 | nfs4_put_stid(&retstp->st_stid); | |
4928 | goto retry; | |
4929 | } | |
8c7245ab | 4930 | /* To keep mutex tracking happy */ |
5cc1fb2a | 4931 | mutex_unlock(&stp->st_mutex); |
8c7245ab | 4932 | stp = retstp; |
5cc1fb2a | 4933 | } |
8c7245ab | 4934 | return stp; |
1da177e4 LT |
4935 | } |
4936 | ||
d3134b10 JL |
4937 | /* |
4938 | * In the 4.0 case we need to keep the owners around a little while to handle | |
4939 | * CLOSE replay. We still do need to release any file access that is held by | |
4940 | * them before returning however. | |
4941 | */ | |
fd39ca9a | 4942 | static void |
d3134b10 | 4943 | move_to_close_lru(struct nfs4_ol_stateid *s, struct net *net) |
1da177e4 | 4944 | { |
217526e7 | 4945 | struct nfs4_ol_stateid *last; |
d3134b10 JL |
4946 | struct nfs4_openowner *oo = openowner(s->st_stateowner); |
4947 | struct nfsd_net *nn = net_generic(s->st_stid.sc_client->net, | |
4948 | nfsd_net_id); | |
73758fed | 4949 | |
fe0750e5 | 4950 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 4951 | |
b401be22 JL |
4952 | /* |
4953 | * We know that we hold one reference via nfsd4_close, and another | |
4954 | * "persistent" reference for the client. If the refcount is higher | |
4955 | * than 2, then there are still calls in progress that are using this | |
4956 | * stateid. We can't put the sc_file reference until they are finished. | |
4957 | * Wait for the refcount to drop to 2. Since it has been unhashed, | |
4958 | * there should be no danger of the refcount going back up again at | |
4959 | * this point. | |
4960 | */ | |
a15dfcd5 | 4961 | wait_event(close_wq, refcount_read(&s->st_stid.sc_count) == 2); |
b401be22 | 4962 | |
d3134b10 JL |
4963 | release_all_access(s); |
4964 | if (s->st_stid.sc_file) { | |
4965 | put_nfs4_file(s->st_stid.sc_file); | |
4966 | s->st_stid.sc_file = NULL; | |
4967 | } | |
217526e7 JL |
4968 | |
4969 | spin_lock(&nn->client_lock); | |
4970 | last = oo->oo_last_closed_stid; | |
d3134b10 | 4971 | oo->oo_last_closed_stid = s; |
73758fed | 4972 | list_move_tail(&oo->oo_close_lru, &nn->close_lru); |
20b7d86f | 4973 | oo->oo_time = ktime_get_boottime_seconds(); |
217526e7 JL |
4974 | spin_unlock(&nn->client_lock); |
4975 | if (last) | |
4976 | nfs4_put_stid(&last->st_stid); | |
1da177e4 LT |
4977 | } |
4978 | ||
15424748 CL |
4979 | static noinline_for_stack struct nfs4_file * |
4980 | nfsd4_file_hash_lookup(const struct svc_fh *fhp) | |
1da177e4 | 4981 | { |
d47b295e CL |
4982 | struct inode *inode = d_inode(fhp->fh_dentry); |
4983 | struct rhlist_head *tmp, *list; | |
15424748 | 4984 | struct nfs4_file *fi; |
1da177e4 | 4985 | |
15424748 | 4986 | rcu_read_lock(); |
d47b295e CL |
4987 | list = rhltable_lookup(&nfs4_file_rhltable, &inode, |
4988 | nfs4_file_rhash_params); | |
4989 | rhl_for_each_entry_rcu(fi, tmp, list, fi_rlist) { | |
15424748 CL |
4990 | if (fh_match(&fi->fi_fhandle, &fhp->fh_handle)) { |
4991 | if (refcount_inc_not_zero(&fi->fi_ref)) { | |
4992 | rcu_read_unlock(); | |
4993 | return fi; | |
4994 | } | |
13cd2184 | 4995 | } |
1da177e4 | 4996 | } |
9270fc51 | 4997 | rcu_read_unlock(); |
1da177e4 LT |
4998 | return NULL; |
4999 | } | |
5000 | ||
9270fc51 CL |
5001 | /* |
5002 | * On hash insertion, identify entries with the same inode but | |
d47b295e CL |
5003 | * distinct filehandles. They will all be on the list returned |
5004 | * by rhltable_lookup(). | |
5005 | * | |
5006 | * inode->i_lock prevents racing insertions from adding an entry | |
5007 | * for the same inode/fhp pair twice. | |
9270fc51 CL |
5008 | */ |
5009 | static noinline_for_stack struct nfs4_file * | |
5010 | nfsd4_file_hash_insert(struct nfs4_file *new, const struct svc_fh *fhp) | |
a0ce4837 | 5011 | { |
d47b295e CL |
5012 | struct inode *inode = d_inode(fhp->fh_dentry); |
5013 | struct rhlist_head *tmp, *list; | |
a0ce4837 BF |
5014 | struct nfs4_file *ret = NULL; |
5015 | bool alias_found = false; | |
9270fc51 | 5016 | struct nfs4_file *fi; |
d47b295e | 5017 | int err; |
a0ce4837 | 5018 | |
d47b295e CL |
5019 | rcu_read_lock(); |
5020 | spin_lock(&inode->i_lock); | |
5021 | ||
5022 | list = rhltable_lookup(&nfs4_file_rhltable, &inode, | |
5023 | nfs4_file_rhash_params); | |
5024 | rhl_for_each_entry_rcu(fi, tmp, list, fi_rlist) { | |
9270fc51 CL |
5025 | if (fh_match(&fi->fi_fhandle, &fhp->fh_handle)) { |
5026 | if (refcount_inc_not_zero(&fi->fi_ref)) | |
5027 | ret = fi; | |
d47b295e | 5028 | } else |
9270fc51 | 5029 | fi->fi_aliased = alias_found = true; |
a0ce4837 | 5030 | } |
d47b295e CL |
5031 | if (ret) |
5032 | goto out_unlock; | |
a0ce4837 | 5033 | |
d47b295e CL |
5034 | nfsd4_file_init(fhp, new); |
5035 | err = rhltable_insert(&nfs4_file_rhltable, &new->fi_rlist, | |
5036 | nfs4_file_rhash_params); | |
5037 | if (err) | |
5038 | goto out_unlock; | |
950e0118 | 5039 | |
d47b295e CL |
5040 | new->fi_aliased = alias_found; |
5041 | ret = new; | |
5042 | ||
5043 | out_unlock: | |
5044 | spin_unlock(&inode->i_lock); | |
5b095e99 | 5045 | rcu_read_unlock(); |
a0ce4837 | 5046 | return ret; |
950e0118 TM |
5047 | } |
5048 | ||
3341678f | 5049 | static noinline_for_stack void nfsd4_file_hash_remove(struct nfs4_file *fi) |
950e0118 | 5050 | { |
d47b295e CL |
5051 | rhltable_remove(&nfs4_file_rhltable, &fi->fi_rlist, |
5052 | nfs4_file_rhash_params); | |
950e0118 TM |
5053 | } |
5054 | ||
1da177e4 LT |
5055 | /* |
5056 | * Called to check deny when READ with all zero stateid or | |
5057 | * WRITE with all zero or all one stateid | |
5058 | */ | |
b37ad28b | 5059 | static __be32 |
1da177e4 LT |
5060 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
5061 | { | |
1da177e4 | 5062 | struct nfs4_file *fp; |
baeb4ff0 | 5063 | __be32 ret = nfs_ok; |
1da177e4 | 5064 | |
15424748 | 5065 | fp = nfsd4_file_hash_lookup(current_fh); |
13cd2184 | 5066 | if (!fp) |
baeb4ff0 | 5067 | return ret; |
15424748 | 5068 | |
baeb4ff0 | 5069 | /* Check for conflicting share reservations */ |
1d31a253 | 5070 | spin_lock(&fp->fi_lock); |
baeb4ff0 JL |
5071 | if (fp->fi_share_deny & deny_type) |
5072 | ret = nfserr_locked; | |
1d31a253 | 5073 | spin_unlock(&fp->fi_lock); |
13cd2184 N |
5074 | put_nfs4_file(fp); |
5075 | return ret; | |
1da177e4 LT |
5076 | } |
5077 | ||
c035362e CL |
5078 | static bool nfsd4_deleg_present(const struct inode *inode) |
5079 | { | |
77c67530 | 5080 | struct file_lock_context *ctx = locks_inode_context(inode); |
c035362e CL |
5081 | |
5082 | return ctx && !list_empty_careful(&ctx->flc_lease); | |
5083 | } | |
5084 | ||
5085 | /** | |
5086 | * nfsd_wait_for_delegreturn - wait for delegations to be returned | |
5087 | * @rqstp: the RPC transaction being executed | |
5088 | * @inode: in-core inode of the file being waited for | |
5089 | * | |
5090 | * The timeout prevents deadlock if all nfsd threads happen to be | |
5091 | * tied up waiting for returning delegations. | |
5092 | * | |
5093 | * Return values: | |
5094 | * %true: delegation was returned | |
5095 | * %false: timed out waiting for delegreturn | |
5096 | */ | |
5097 | bool nfsd_wait_for_delegreturn(struct svc_rqst *rqstp, struct inode *inode) | |
5098 | { | |
5099 | long __maybe_unused timeo; | |
5100 | ||
5101 | timeo = wait_var_event_timeout(inode, !nfsd4_deleg_present(inode), | |
5102 | NFSD_DELEGRETURN_TIMEOUT); | |
5103 | trace_nfsd_delegret_wakeup(rqstp, inode, timeo); | |
5104 | return timeo > 0; | |
5105 | } | |
5106 | ||
0162ac2b | 5107 | static void nfsd4_cb_recall_prepare(struct nfsd4_callback *cb) |
1da177e4 | 5108 | { |
0162ac2b | 5109 | struct nfs4_delegation *dp = cb_to_delegation(cb); |
11b9164a TM |
5110 | struct nfsd_net *nn = net_generic(dp->dl_stid.sc_client->net, |
5111 | nfsd_net_id); | |
e8c69d17 | 5112 | |
11b9164a | 5113 | block_delegations(&dp->dl_stid.sc_file->fi_fhandle); |
f54fe962 | 5114 | |
dff1399f | 5115 | /* |
f54fe962 JL |
5116 | * We can't do this in nfsd_break_deleg_cb because it is |
5117 | * already holding inode->i_lock. | |
5118 | * | |
dff1399f JL |
5119 | * If the dl_time != 0, then we know that it has already been |
5120 | * queued for a lease break. Don't queue it again. | |
5121 | */ | |
f54fe962 | 5122 | spin_lock(&state_lock); |
548ec080 | 5123 | if (delegation_hashed(dp) && dp->dl_time == 0) { |
20b7d86f | 5124 | dp->dl_time = ktime_get_boottime_seconds(); |
02e1215f | 5125 | list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru); |
dff1399f | 5126 | } |
02e1215f JL |
5127 | spin_unlock(&state_lock); |
5128 | } | |
1da177e4 | 5129 | |
0162ac2b CH |
5130 | static int nfsd4_cb_recall_done(struct nfsd4_callback *cb, |
5131 | struct rpc_task *task) | |
5132 | { | |
5133 | struct nfs4_delegation *dp = cb_to_delegation(cb); | |
5134 | ||
1035d654 CL |
5135 | trace_nfsd_cb_recall_done(&dp->dl_stid.sc_stateid, task); |
5136 | ||
3f29cc82 N |
5137 | if (dp->dl_stid.sc_status) |
5138 | /* CLOSED or REVOKED */ | |
5139 | return 1; | |
a457974f | 5140 | |
0162ac2b CH |
5141 | switch (task->tk_status) { |
5142 | case 0: | |
5143 | return 1; | |
1c73b9d2 SM |
5144 | case -NFS4ERR_DELAY: |
5145 | rpc_delay(task, 2 * HZ); | |
5146 | return 0; | |
0162ac2b CH |
5147 | case -EBADHANDLE: |
5148 | case -NFS4ERR_BAD_STATEID: | |
5149 | /* | |
5150 | * Race: client probably got cb_recall before open reply | |
5151 | * granting delegation. | |
5152 | */ | |
5153 | if (dp->dl_retries--) { | |
5154 | rpc_delay(task, 2 * HZ); | |
5155 | return 0; | |
5156 | } | |
df561f66 | 5157 | fallthrough; |
0162ac2b | 5158 | default: |
1c73b9d2 | 5159 | return 1; |
0162ac2b CH |
5160 | } |
5161 | } | |
5162 | ||
5163 | static void nfsd4_cb_recall_release(struct nfsd4_callback *cb) | |
5164 | { | |
5165 | struct nfs4_delegation *dp = cb_to_delegation(cb); | |
5166 | ||
5167 | nfs4_put_stid(&dp->dl_stid); | |
5168 | } | |
5169 | ||
c4cb8974 | 5170 | static const struct nfsd4_callback_ops nfsd4_cb_recall_ops = { |
0162ac2b CH |
5171 | .prepare = nfsd4_cb_recall_prepare, |
5172 | .done = nfsd4_cb_recall_done, | |
5173 | .release = nfsd4_cb_recall_release, | |
5174 | }; | |
5175 | ||
02e1215f JL |
5176 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
5177 | { | |
5178 | /* | |
5179 | * We're assuming the state code never drops its reference | |
5180 | * without first removing the lease. Since we're in this lease | |
4a269efb | 5181 | * callback (and since the lease code is serialized by the |
25fbe1fc | 5182 | * flc_lock) we know the server hasn't removed the lease yet, and |
4a269efb | 5183 | * we know it's safe to take a reference. |
02e1215f | 5184 | */ |
a15dfcd5 | 5185 | refcount_inc(&dp->dl_stid.sc_count); |
b95239ca | 5186 | WARN_ON_ONCE(!nfsd4_run_cb(&dp->dl_recall)); |
6b57d9c8 BF |
5187 | } |
5188 | ||
25fbe1fc | 5189 | /* Called from break_lease() with flc_lock held. */ |
4d01b7f5 JL |
5190 | static bool |
5191 | nfsd_break_deleg_cb(struct file_lock *fl) | |
6b57d9c8 | 5192 | { |
653e514e BF |
5193 | struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; |
5194 | struct nfs4_file *fp = dp->dl_stid.sc_file; | |
66af2579 DN |
5195 | struct nfs4_client *clp = dp->dl_stid.sc_client; |
5196 | struct nfsd_net *nn; | |
6b57d9c8 | 5197 | |
17d76ddf | 5198 | trace_nfsd_cb_recall(&dp->dl_stid); |
dd5e3fbc | 5199 | |
66af2579 DN |
5200 | dp->dl_recalled = true; |
5201 | atomic_inc(&clp->cl_delegs_in_recall); | |
5202 | if (try_to_expire_client(clp)) { | |
5203 | nn = net_generic(clp->net, nfsd_net_id); | |
5204 | mod_delayed_work(laundry_wq, &nn->laundromat_work, 0); | |
5205 | } | |
5206 | ||
0272e1fd BF |
5207 | /* |
5208 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 5209 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 5210 | * in time: |
0272e1fd BF |
5211 | */ |
5212 | fl->fl_break_time = 0; | |
1da177e4 | 5213 | |
417c6629 | 5214 | fp->fi_had_conflict = true; |
353601e7 | 5215 | nfsd_break_one_deleg(dp); |
b95239ca | 5216 | return false; |
1da177e4 LT |
5217 | } |
5218 | ||
50719bf3 CL |
5219 | /** |
5220 | * nfsd_breaker_owns_lease - Check if lease conflict was resolved | |
5221 | * @fl: Lock state to check | |
5222 | * | |
5223 | * Return values: | |
5224 | * %true: Lease conflict was resolved | |
5225 | * %false: Lease conflict was not resolved. | |
5226 | */ | |
28df3d15 BF |
5227 | static bool nfsd_breaker_owns_lease(struct file_lock *fl) |
5228 | { | |
5229 | struct nfs4_delegation *dl = fl->fl_owner; | |
5230 | struct svc_rqst *rqst; | |
5231 | struct nfs4_client *clp; | |
5232 | ||
5233 | if (!i_am_nfsd()) | |
50719bf3 | 5234 | return false; |
28df3d15 | 5235 | rqst = kthread_data(current); |
13956160 BF |
5236 | /* Note rq_prog == NFS_ACL_PROGRAM is also possible: */ |
5237 | if (rqst->rq_prog != NFS_PROGRAM || rqst->rq_vers < 4) | |
50719bf3 | 5238 | return false; |
28df3d15 BF |
5239 | clp = *(rqst->rq_lease_breaker); |
5240 | return dl->dl_stid.sc_client == clp; | |
5241 | } | |
5242 | ||
c45198ed | 5243 | static int |
7448cc37 JL |
5244 | nfsd_change_deleg_cb(struct file_lock *onlist, int arg, |
5245 | struct list_head *dispose) | |
1da177e4 | 5246 | { |
66af2579 DN |
5247 | struct nfs4_delegation *dp = (struct nfs4_delegation *)onlist->fl_owner; |
5248 | struct nfs4_client *clp = dp->dl_stid.sc_client; | |
5249 | ||
5250 | if (arg & F_UNLCK) { | |
5251 | if (dp->dl_recalled) | |
5252 | atomic_dec(&clp->cl_delegs_in_recall); | |
c45198ed | 5253 | return lease_modify(onlist, arg, dispose); |
66af2579 | 5254 | } else |
1da177e4 LT |
5255 | return -EAGAIN; |
5256 | } | |
5257 | ||
7b021967 | 5258 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
28df3d15 | 5259 | .lm_breaker_owns_lease = nfsd_breaker_owns_lease, |
8fb47a4f BF |
5260 | .lm_break = nfsd_break_deleg_cb, |
5261 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
5262 | }; |
5263 | ||
7a8711c9 BF |
5264 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
5265 | { | |
5266 | if (nfsd4_has_session(cstate)) | |
5267 | return nfs_ok; | |
5268 | if (seqid == so->so_seqid - 1) | |
5269 | return nfserr_replay_me; | |
5270 | if (seqid == so->so_seqid) | |
5271 | return nfs_ok; | |
5272 | return nfserr_bad_seqid; | |
5273 | } | |
1da177e4 | 5274 | |
7950b531 BF |
5275 | static struct nfs4_client *lookup_clientid(clientid_t *clid, bool sessions, |
5276 | struct nfsd_net *nn) | |
5277 | { | |
5278 | struct nfs4_client *found; | |
5279 | ||
5280 | spin_lock(&nn->client_lock); | |
5281 | found = find_confirmed_client(clid, sessions, nn); | |
5282 | if (found) | |
5283 | atomic_inc(&found->cl_rpc_users); | |
5284 | spin_unlock(&nn->client_lock); | |
5285 | return found; | |
5286 | } | |
5287 | ||
460d2709 | 5288 | static __be32 set_client(clientid_t *clid, |
4b24ca7d | 5289 | struct nfsd4_compound_state *cstate, |
f71475ba | 5290 | struct nfsd_net *nn) |
4b24ca7d | 5291 | { |
4b24ca7d | 5292 | if (cstate->clp) { |
7950b531 | 5293 | if (!same_clid(&cstate->clp->cl_clientid, clid)) |
4b24ca7d JL |
5294 | return nfserr_stale_clientid; |
5295 | return nfs_ok; | |
5296 | } | |
4b24ca7d JL |
5297 | if (STALE_CLIENTID(clid, nn)) |
5298 | return nfserr_stale_clientid; | |
4b24ca7d | 5299 | /* |
f71475ba BF |
5300 | * We're in the 4.0 case (otherwise the SEQUENCE op would have |
5301 | * set cstate->clp), so session = false: | |
4b24ca7d | 5302 | */ |
f71475ba | 5303 | cstate->clp = lookup_clientid(clid, false, nn); |
7950b531 | 5304 | if (!cstate->clp) |
4b24ca7d | 5305 | return nfserr_expired; |
4b24ca7d JL |
5306 | return nfs_ok; |
5307 | } | |
5308 | ||
b37ad28b | 5309 | __be32 |
6668958f | 5310 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
3320fef1 | 5311 | struct nfsd4_open *open, struct nfsd_net *nn) |
1da177e4 | 5312 | { |
1da177e4 LT |
5313 | clientid_t *clientid = &open->op_clientid; |
5314 | struct nfs4_client *clp = NULL; | |
5315 | unsigned int strhashval; | |
fe0750e5 | 5316 | struct nfs4_openowner *oo = NULL; |
4cdc951b | 5317 | __be32 status; |
1da177e4 | 5318 | |
32513b40 BF |
5319 | /* |
5320 | * In case we need it later, after we've already created the | |
5321 | * file and don't want to risk a further failure: | |
5322 | */ | |
5323 | open->op_file = nfsd4_alloc_file(); | |
5324 | if (open->op_file == NULL) | |
5325 | return nfserr_jukebox; | |
1da177e4 | 5326 | |
f71475ba | 5327 | status = set_client(clientid, cstate, nn); |
2d91e895 TM |
5328 | if (status) |
5329 | return status; | |
5330 | clp = cstate->clp; | |
5331 | ||
d4f0489f TM |
5332 | strhashval = ownerstr_hashval(&open->op_owner); |
5333 | oo = find_openstateowner_str(strhashval, open, clp); | |
fe0750e5 BF |
5334 | open->op_openowner = oo; |
5335 | if (!oo) { | |
bcf130f9 | 5336 | goto new_owner; |
1da177e4 | 5337 | } |
dad1c067 | 5338 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
0f442aa2 | 5339 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
5340 | release_openowner(oo); |
5341 | open->op_openowner = NULL; | |
bcf130f9 | 5342 | goto new_owner; |
0f442aa2 | 5343 | } |
4cdc951b BF |
5344 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
5345 | if (status) | |
5346 | return status; | |
4cdc951b | 5347 | goto alloc_stateid; |
bcf130f9 | 5348 | new_owner: |
13d6f66b | 5349 | oo = alloc_init_open_stateowner(strhashval, open, cstate); |
bcf130f9 BF |
5350 | if (oo == NULL) |
5351 | return nfserr_jukebox; | |
5352 | open->op_openowner = oo; | |
4cdc951b | 5353 | alloc_stateid: |
b49e084d | 5354 | open->op_stp = nfs4_alloc_open_stateid(clp); |
4cdc951b BF |
5355 | if (!open->op_stp) |
5356 | return nfserr_jukebox; | |
8287f009 SB |
5357 | |
5358 | if (nfsd4_has_session(cstate) && | |
5359 | (cstate->current_fh.fh_export->ex_flags & NFSEXP_PNFS)) { | |
5360 | open->op_odstate = alloc_clnt_odstate(clp); | |
5361 | if (!open->op_odstate) | |
5362 | return nfserr_jukebox; | |
5363 | } | |
5364 | ||
0f442aa2 | 5365 | return nfs_ok; |
1da177e4 LT |
5366 | } |
5367 | ||
b37ad28b | 5368 | static inline __be32 |
4a6e43e6 N |
5369 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
5370 | { | |
5371 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
5372 | return nfserr_openmode; | |
5373 | else | |
5374 | return nfs_ok; | |
5375 | } | |
5376 | ||
f459e453 | 5377 | static int share_access_to_flags(u32 share_access) |
52f4fb43 | 5378 | { |
f459e453 | 5379 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
52f4fb43 N |
5380 | } |
5381 | ||
3f29cc82 N |
5382 | static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, |
5383 | stateid_t *s) | |
24a0111e | 5384 | { |
f459e453 | 5385 | struct nfs4_stid *ret; |
24a0111e | 5386 | |
3f29cc82 | 5387 | ret = find_stateid_by_type(cl, s, SC_TYPE_DELEG, SC_STATUS_REVOKED); |
f459e453 BF |
5388 | if (!ret) |
5389 | return NULL; | |
5390 | return delegstateid(ret); | |
24a0111e BF |
5391 | } |
5392 | ||
8b289b2c BF |
5393 | static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) |
5394 | { | |
5395 | return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || | |
5396 | open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; | |
5397 | } | |
5398 | ||
b37ad28b | 5399 | static __be32 |
41d22663 | 5400 | nfs4_check_deleg(struct nfs4_client *cl, struct nfsd4_open *open, |
567d9829 N |
5401 | struct nfs4_delegation **dp) |
5402 | { | |
5403 | int flags; | |
b37ad28b | 5404 | __be32 status = nfserr_bad_stateid; |
dcd94cc2 | 5405 | struct nfs4_delegation *deleg; |
567d9829 | 5406 | |
dcd94cc2 TM |
5407 | deleg = find_deleg_stateid(cl, &open->op_delegate_stateid); |
5408 | if (deleg == NULL) | |
c44c5eeb | 5409 | goto out; |
1ac3629b N |
5410 | if (deleg->dl_stid.sc_status & SC_STATUS_ADMIN_REVOKED) { |
5411 | nfs4_put_stid(&deleg->dl_stid); | |
5412 | status = nfserr_admin_revoked; | |
5413 | goto out; | |
5414 | } | |
3f29cc82 | 5415 | if (deleg->dl_stid.sc_status & SC_STATUS_REVOKED) { |
95da1b3a | 5416 | nfs4_put_stid(&deleg->dl_stid); |
d688d858 | 5417 | nfsd40_drop_revoked_stid(cl, &open->op_delegate_stateid); |
83e73316 | 5418 | status = nfserr_deleg_revoked; |
95da1b3a AE |
5419 | goto out; |
5420 | } | |
24a0111e | 5421 | flags = share_access_to_flags(open->op_share_access); |
dcd94cc2 TM |
5422 | status = nfs4_check_delegmode(deleg, flags); |
5423 | if (status) { | |
5424 | nfs4_put_stid(&deleg->dl_stid); | |
5425 | goto out; | |
5426 | } | |
5427 | *dp = deleg; | |
c44c5eeb | 5428 | out: |
8b289b2c | 5429 | if (!nfsd4_is_deleg_cur(open)) |
c44c5eeb N |
5430 | return nfs_ok; |
5431 | if (status) | |
5432 | return status; | |
dad1c067 | 5433 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
c44c5eeb | 5434 | return nfs_ok; |
567d9829 N |
5435 | } |
5436 | ||
21fb4016 BF |
5437 | static inline int nfs4_access_to_access(u32 nfs4_access) |
5438 | { | |
5439 | int flags = 0; | |
5440 | ||
5441 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
5442 | flags |= NFSD_MAY_READ; | |
5443 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
5444 | flags |= NFSD_MAY_WRITE; | |
5445 | return flags; | |
5446 | } | |
5447 | ||
7e6a72e5 CH |
5448 | static inline __be32 |
5449 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, | |
5450 | struct nfsd4_open *open) | |
5451 | { | |
5452 | struct iattr iattr = { | |
5453 | .ia_valid = ATTR_SIZE, | |
5454 | .ia_size = 0, | |
5455 | }; | |
7fe2a71d N |
5456 | struct nfsd_attrs attrs = { |
5457 | .na_iattr = &iattr, | |
5458 | }; | |
7e6a72e5 CH |
5459 | if (!open->op_truncate) |
5460 | return 0; | |
5461 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
5462 | return nfserr_inval; | |
7fe2a71d | 5463 | return nfsd_setattr(rqstp, fh, &attrs, 0, (time64_t)0); |
7e6a72e5 CH |
5464 | } |
5465 | ||
0c12eaff | 5466 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
6eb3a1d0 | 5467 | struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp, |
3d694271 | 5468 | struct nfsd4_open *open, bool new_stp) |
f9d7562f | 5469 | { |
fd4f83fd | 5470 | struct nfsd_file *nf = NULL; |
f9d7562f | 5471 | __be32 status; |
0c12eaff CB |
5472 | int oflag = nfs4_access_to_omode(open->op_share_access); |
5473 | int access = nfs4_access_to_access(open->op_share_access); | |
baeb4ff0 | 5474 | unsigned char old_access_bmap, old_deny_bmap; |
0c12eaff | 5475 | |
de18643d | 5476 | spin_lock(&fp->fi_lock); |
baeb4ff0 JL |
5477 | |
5478 | /* | |
5479 | * Are we trying to set a deny mode that would conflict with | |
5480 | * current access? | |
5481 | */ | |
5482 | status = nfs4_file_check_deny(fp, open->op_share_deny); | |
5483 | if (status != nfs_ok) { | |
3d694271 DN |
5484 | if (status != nfserr_share_denied) { |
5485 | spin_unlock(&fp->fi_lock); | |
5486 | goto out; | |
5487 | } | |
5488 | if (nfs4_resolve_deny_conflicts_locked(fp, new_stp, | |
5489 | stp, open->op_share_deny, false)) | |
5490 | status = nfserr_jukebox; | |
baeb4ff0 JL |
5491 | spin_unlock(&fp->fi_lock); |
5492 | goto out; | |
5493 | } | |
5494 | ||
5495 | /* set access to the file */ | |
5496 | status = nfs4_file_get_access(fp, open->op_share_access); | |
5497 | if (status != nfs_ok) { | |
3d694271 DN |
5498 | if (status != nfserr_share_denied) { |
5499 | spin_unlock(&fp->fi_lock); | |
5500 | goto out; | |
5501 | } | |
5502 | if (nfs4_resolve_deny_conflicts_locked(fp, new_stp, | |
5503 | stp, open->op_share_access, true)) | |
5504 | status = nfserr_jukebox; | |
baeb4ff0 JL |
5505 | spin_unlock(&fp->fi_lock); |
5506 | goto out; | |
5507 | } | |
5508 | ||
5509 | /* Set access bits in stateid */ | |
5510 | old_access_bmap = stp->st_access_bmap; | |
5511 | set_access(open->op_share_access, stp); | |
5512 | ||
5513 | /* Set new deny mask */ | |
5514 | old_deny_bmap = stp->st_deny_bmap; | |
5515 | set_deny(open->op_share_deny, stp); | |
5516 | fp->fi_share_deny |= (open->op_share_deny & NFS4_SHARE_DENY_BOTH); | |
5517 | ||
f9d7562f | 5518 | if (!fp->fi_fds[oflag]) { |
de18643d | 5519 | spin_unlock(&fp->fi_lock); |
fb70bf12 | 5520 | |
0b3a551f JL |
5521 | status = nfsd_file_acquire_opened(rqstp, cur_fh, access, |
5522 | open->op_filp, &nf); | |
5523 | if (status != nfs_ok) | |
5524 | goto out_put_access; | |
fb70bf12 | 5525 | |
de18643d TM |
5526 | spin_lock(&fp->fi_lock); |
5527 | if (!fp->fi_fds[oflag]) { | |
fd4f83fd JL |
5528 | fp->fi_fds[oflag] = nf; |
5529 | nf = NULL; | |
de18643d | 5530 | } |
f9d7562f | 5531 | } |
de18643d | 5532 | spin_unlock(&fp->fi_lock); |
fd4f83fd JL |
5533 | if (nf) |
5534 | nfsd_file_put(nf); | |
f9d7562f | 5535 | |
217fd6f6 BF |
5536 | status = nfserrno(nfsd_open_break_lease(cur_fh->fh_dentry->d_inode, |
5537 | access)); | |
5538 | if (status) | |
5539 | goto out_put_access; | |
5540 | ||
7e6a72e5 CH |
5541 | status = nfsd4_truncate(rqstp, cur_fh, open); |
5542 | if (status) | |
5543 | goto out_put_access; | |
7e6a72e5 CH |
5544 | out: |
5545 | return status; | |
baeb4ff0 JL |
5546 | out_put_access: |
5547 | stp->st_access_bmap = old_access_bmap; | |
5548 | nfs4_file_put_access(fp, open->op_share_access); | |
5549 | reset_union_bmap_deny(bmap_to_share_mode(old_deny_bmap), stp); | |
5550 | goto out; | |
1da177e4 LT |
5551 | } |
5552 | ||
b37ad28b | 5553 | static __be32 |
3d694271 DN |
5554 | nfs4_upgrade_open(struct svc_rqst *rqstp, struct nfs4_file *fp, |
5555 | struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp, | |
5556 | struct nfsd4_open *open) | |
1da177e4 | 5557 | { |
b37ad28b | 5558 | __be32 status; |
6ac75368 | 5559 | unsigned char old_deny_bmap = stp->st_deny_bmap; |
1da177e4 | 5560 | |
6eb3a1d0 | 5561 | if (!test_access(open->op_share_access, stp)) |
3d694271 | 5562 | return nfs4_get_vfs_file(rqstp, fp, cur_fh, stp, open, false); |
7e6a72e5 | 5563 | |
baeb4ff0 JL |
5564 | /* test and set deny mode */ |
5565 | spin_lock(&fp->fi_lock); | |
5566 | status = nfs4_file_check_deny(fp, open->op_share_deny); | |
dcd779dc JL |
5567 | switch (status) { |
5568 | case nfs_ok: | |
5569 | set_deny(open->op_share_deny, stp); | |
5570 | fp->fi_share_deny |= | |
5571 | (open->op_share_deny & NFS4_SHARE_DENY_BOTH); | |
5572 | break; | |
5573 | case nfserr_share_denied: | |
5574 | if (nfs4_resolve_deny_conflicts_locked(fp, false, | |
5575 | stp, open->op_share_deny, false)) | |
5576 | status = nfserr_jukebox; | |
5577 | break; | |
baeb4ff0 JL |
5578 | } |
5579 | spin_unlock(&fp->fi_lock); | |
5580 | ||
5581 | if (status != nfs_ok) | |
1da177e4 | 5582 | return status; |
1da177e4 | 5583 | |
baeb4ff0 JL |
5584 | status = nfsd4_truncate(rqstp, cur_fh, open); |
5585 | if (status != nfs_ok) | |
5586 | reset_union_bmap_deny(old_deny_bmap, stp); | |
5587 | return status; | |
5588 | } | |
1da177e4 | 5589 | |
14a24e99 BF |
5590 | /* Should we give out recallable state?: */ |
5591 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
5592 | { | |
5593 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
5594 | return true; | |
5595 | /* | |
5596 | * In the sessions case, since we don't have to establish a | |
5597 | * separate connection for callbacks, we assume it's OK | |
5598 | * until we hear otherwise: | |
5599 | */ | |
5600 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
5601 | } | |
5602 | ||
653e514e BF |
5603 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, |
5604 | int flag) | |
22d38c4c BF |
5605 | { |
5606 | struct file_lock *fl; | |
5607 | ||
5608 | fl = locks_alloc_lock(); | |
5609 | if (!fl) | |
5610 | return NULL; | |
22d38c4c | 5611 | fl->fl_lmops = &nfsd_lease_mng_ops; |
617588d5 | 5612 | fl->fl_flags = FL_DELEG; |
22d38c4c BF |
5613 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; |
5614 | fl->fl_end = OFFSET_MAX; | |
653e514e | 5615 | fl->fl_owner = (fl_owner_t)dp; |
22d38c4c | 5616 | fl->fl_pid = current->tgid; |
eb82dd39 | 5617 | fl->fl_file = dp->dl_stid.sc_file->fi_deleg_file->nf_file; |
22d38c4c BF |
5618 | return fl; |
5619 | } | |
5620 | ||
aba2072f BF |
5621 | static int nfsd4_check_conflicting_opens(struct nfs4_client *clp, |
5622 | struct nfs4_file *fp) | |
5623 | { | |
5624 | struct nfs4_ol_stateid *st; | |
5625 | struct file *f = fp->fi_deleg_file->nf_file; | |
c65454a9 | 5626 | struct inode *ino = file_inode(f); |
aba2072f BF |
5627 | int writes; |
5628 | ||
5629 | writes = atomic_read(&ino->i_writecount); | |
5630 | if (!writes) | |
5631 | return 0; | |
5632 | /* | |
5633 | * There could be multiple filehandles (hence multiple | |
5634 | * nfs4_files) referencing this file, but that's not too | |
5635 | * common; let's just give up in that case rather than | |
5636 | * trying to go look up all the clients using that other | |
5637 | * nfs4_file as well: | |
5638 | */ | |
5639 | if (fp->fi_aliased) | |
5640 | return -EAGAIN; | |
5641 | /* | |
5642 | * If there's a close in progress, make sure that we see it | |
5643 | * clear any fi_fds[] entries before we see it decrement | |
5644 | * i_writecount: | |
5645 | */ | |
5646 | smp_mb__after_atomic(); | |
5647 | ||
5648 | if (fp->fi_fds[O_WRONLY]) | |
5649 | writes--; | |
5650 | if (fp->fi_fds[O_RDWR]) | |
5651 | writes--; | |
5652 | if (writes > 0) | |
5653 | return -EAGAIN; /* There may be non-NFSv4 writers */ | |
5654 | /* | |
5655 | * It's possible there are non-NFSv4 write opens in progress, | |
5656 | * but if they haven't incremented i_writecount yet then they | |
5657 | * also haven't called break lease yet; so, they'll break this | |
5658 | * lease soon enough. So, all that's left to check for is NFSv4 | |
5659 | * opens: | |
5660 | */ | |
5661 | spin_lock(&fp->fi_lock); | |
5662 | list_for_each_entry(st, &fp->fi_stateids, st_perfile) { | |
5663 | if (st->st_openstp == NULL /* it's an open */ && | |
5664 | access_permit_write(st) && | |
5665 | st->st_stid.sc_client != clp) { | |
5666 | spin_unlock(&fp->fi_lock); | |
5667 | return -EAGAIN; | |
5668 | } | |
5669 | } | |
5670 | spin_unlock(&fp->fi_lock); | |
5671 | /* | |
5672 | * There's a small chance that we could be racing with another | |
5673 | * NFSv4 open. However, any open that hasn't added itself to | |
5674 | * the fi_stateids list also hasn't called break_lease yet; so, | |
5675 | * they'll break this lease soon enough. | |
5676 | */ | |
5677 | return 0; | |
5678 | } | |
5679 | ||
876c553c JL |
5680 | /* |
5681 | * It's possible that between opening the dentry and setting the delegation, | |
5682 | * that it has been renamed or unlinked. Redo the lookup to verify that this | |
5683 | * hasn't happened. | |
5684 | */ | |
5685 | static int | |
5686 | nfsd4_verify_deleg_dentry(struct nfsd4_open *open, struct nfs4_file *fp, | |
5687 | struct svc_fh *parent) | |
5688 | { | |
5689 | struct svc_export *exp; | |
5690 | struct dentry *child; | |
5691 | __be32 err; | |
5692 | ||
876c553c JL |
5693 | err = nfsd_lookup_dentry(open->op_rqstp, parent, |
5694 | open->op_fname, open->op_fnamelen, | |
5695 | &exp, &child); | |
5696 | ||
5697 | if (err) | |
5698 | return -EAGAIN; | |
5699 | ||
50256e47 | 5700 | exp_put(exp); |
876c553c JL |
5701 | dput(child); |
5702 | if (child != file_dentry(fp->fi_deleg_file->nf_file)) | |
5703 | return -EAGAIN; | |
5704 | ||
5705 | return 0; | |
5706 | } | |
5707 | ||
826b67e6 JL |
5708 | /* |
5709 | * We avoid breaking delegations held by a client due to its own activity, but | |
5710 | * clearing setuid/setgid bits on a write is an implicit activity and the client | |
5711 | * may not notice and continue using the old mode. Avoid giving out a delegation | |
5712 | * on setuid/setgid files when the client is requesting an open for write. | |
5713 | */ | |
5714 | static int | |
5715 | nfsd4_verify_setuid_write(struct nfsd4_open *open, struct nfsd_file *nf) | |
5716 | { | |
5717 | struct inode *inode = file_inode(nf->nf_file); | |
5718 | ||
5719 | if ((open->op_share_access & NFS4_SHARE_ACCESS_WRITE) && | |
5720 | (inode->i_mode & (S_ISUID|S_ISGID))) | |
5721 | return -EAGAIN; | |
5722 | return 0; | |
5723 | } | |
5724 | ||
0b26693c | 5725 | static struct nfs4_delegation * |
876c553c JL |
5726 | nfs4_set_delegation(struct nfsd4_open *open, struct nfs4_ol_stateid *stp, |
5727 | struct svc_fh *parent) | |
acfdf5c3 | 5728 | { |
68b18f52 | 5729 | int status = 0; |
876c553c JL |
5730 | struct nfs4_client *clp = stp->st_stid.sc_client; |
5731 | struct nfs4_file *fp = stp->st_stid.sc_file; | |
5732 | struct nfs4_clnt_odstate *odstate = stp->st_clnt_odstate; | |
0b26693c | 5733 | struct nfs4_delegation *dp; |
1d3dd1d5 | 5734 | struct nfsd_file *nf = NULL; |
353601e7 | 5735 | struct file_lock *fl; |
1d3dd1d5 | 5736 | u32 dl_type; |
417c6629 | 5737 | |
353601e7 BF |
5738 | /* |
5739 | * The fi_had_conflict and nfs_get_existing_delegation checks | |
5740 | * here are just optimizations; we'll need to recheck them at | |
5741 | * the end: | |
5742 | */ | |
bf7bd3e9 | 5743 | if (fp->fi_had_conflict) |
0b26693c JL |
5744 | return ERR_PTR(-EAGAIN); |
5745 | ||
1d3dd1d5 DN |
5746 | /* |
5747 | * Try for a write delegation first. RFC8881 section 10.4 says: | |
5748 | * | |
5749 | * "An OPEN_DELEGATE_WRITE delegation allows the client to handle, | |
5750 | * on its own, all opens." | |
5751 | * | |
5752 | * Furthermore the client can use a write delegation for most READ | |
5753 | * operations as well, so we require a O_RDWR file here. | |
5754 | * | |
5755 | * Offer a write delegation in the case of a BOTH open, and ensure | |
5756 | * we get the O_RDWR descriptor. | |
5757 | */ | |
5758 | if ((open->op_share_access & NFS4_SHARE_ACCESS_BOTH) == NFS4_SHARE_ACCESS_BOTH) { | |
5759 | nf = find_rw_file(fp); | |
5760 | dl_type = NFS4_OPEN_DELEGATE_WRITE; | |
353601e7 | 5761 | } |
1d3dd1d5 DN |
5762 | |
5763 | /* | |
5764 | * If the file is being opened O_RDONLY or we couldn't get a O_RDWR | |
5765 | * file for some reason, then try for a read delegation instead. | |
5766 | */ | |
5767 | if (!nf && (open->op_share_access & NFS4_SHARE_ACCESS_READ)) { | |
5768 | nf = find_readable_file(fp); | |
5769 | dl_type = NFS4_OPEN_DELEGATE_READ; | |
5770 | } | |
5771 | ||
5772 | if (!nf) | |
5773 | return ERR_PTR(-EAGAIN); | |
5774 | ||
34ed9872 AE |
5775 | spin_lock(&state_lock); |
5776 | spin_lock(&fp->fi_lock); | |
68b18f52 BF |
5777 | if (nfs4_delegation_exists(clp, fp)) |
5778 | status = -EAGAIN; | |
826b67e6 JL |
5779 | else if (nfsd4_verify_setuid_write(open, nf)) |
5780 | status = -EAGAIN; | |
353601e7 | 5781 | else if (!fp->fi_deleg_file) { |
eb82dd39 | 5782 | fp->fi_deleg_file = nf; |
353601e7 BF |
5783 | /* increment early to prevent fi_deleg_file from being |
5784 | * cleared */ | |
5785 | fp->fi_delegees = 1; | |
eb82dd39 | 5786 | nf = NULL; |
353601e7 BF |
5787 | } else |
5788 | fp->fi_delegees++; | |
34ed9872 AE |
5789 | spin_unlock(&fp->fi_lock); |
5790 | spin_unlock(&state_lock); | |
eb82dd39 JL |
5791 | if (nf) |
5792 | nfsd_file_put(nf); | |
34ed9872 AE |
5793 | if (status) |
5794 | return ERR_PTR(status); | |
5795 | ||
353601e7 | 5796 | status = -ENOMEM; |
1d3dd1d5 | 5797 | dp = alloc_init_deleg(clp, fp, odstate, dl_type); |
0b26693c | 5798 | if (!dp) |
353601e7 BF |
5799 | goto out_delegees; |
5800 | ||
1d3dd1d5 | 5801 | fl = nfs4_alloc_init_lease(dp, dl_type); |
353601e7 | 5802 | if (!fl) |
bd8d7250 | 5803 | goto out_clnt_odstate; |
353601e7 | 5804 | |
eb82dd39 | 5805 | status = vfs_setlease(fp->fi_deleg_file->nf_file, fl->fl_type, &fl, NULL); |
353601e7 BF |
5806 | if (fl) |
5807 | locks_free_lock(fl); | |
5808 | if (status) | |
5809 | goto out_clnt_odstate; | |
876c553c JL |
5810 | |
5811 | if (parent) { | |
5812 | status = nfsd4_verify_deleg_dentry(open, fp, parent); | |
5813 | if (status) | |
5814 | goto out_unlock; | |
5815 | } | |
5816 | ||
aba2072f BF |
5817 | status = nfsd4_check_conflicting_opens(clp, fp); |
5818 | if (status) | |
5819 | goto out_unlock; | |
0b26693c | 5820 | |
826b67e6 JL |
5821 | /* |
5822 | * Now that the deleg is set, check again to ensure that nothing | |
5823 | * raced in and changed the mode while we weren't lookng. | |
5824 | */ | |
5825 | status = nfsd4_verify_setuid_write(open, fp->fi_deleg_file); | |
5826 | if (status) | |
5827 | goto out_unlock; | |
5828 | ||
5ea9a7c5 N |
5829 | status = -EAGAIN; |
5830 | if (fp->fi_had_conflict) | |
5831 | goto out_unlock; | |
5832 | ||
417c6629 | 5833 | spin_lock(&state_lock); |
77945728 | 5834 | spin_lock(&clp->cl_lock); |
417c6629 | 5835 | spin_lock(&fp->fi_lock); |
5ea9a7c5 | 5836 | status = hash_delegation_locked(dp, fp); |
417c6629 | 5837 | spin_unlock(&fp->fi_lock); |
77945728 | 5838 | spin_unlock(&clp->cl_lock); |
cdc97505 | 5839 | spin_unlock(&state_lock); |
353601e7 BF |
5840 | |
5841 | if (status) | |
692ad280 AE |
5842 | goto out_unlock; |
5843 | ||
0b26693c | 5844 | return dp; |
692ad280 | 5845 | out_unlock: |
eb82dd39 | 5846 | vfs_setlease(fp->fi_deleg_file->nf_file, F_UNLCK, NULL, (void **)&dp); |
353601e7 BF |
5847 | out_clnt_odstate: |
5848 | put_clnt_odstate(dp->dl_clnt_odstate); | |
353601e7 BF |
5849 | nfs4_put_stid(&dp->dl_stid); |
5850 | out_delegees: | |
5851 | put_deleg_file(fp); | |
5852 | return ERR_PTR(status); | |
edab9782 BF |
5853 | } |
5854 | ||
4aa8913c BH |
5855 | static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) |
5856 | { | |
5857 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
5858 | if (status == -EAGAIN) | |
5859 | open->op_why_no_deleg = WND4_CONTENTION; | |
5860 | else { | |
5861 | open->op_why_no_deleg = WND4_RESOURCE; | |
5862 | switch (open->op_deleg_want) { | |
5863 | case NFS4_SHARE_WANT_READ_DELEG: | |
5864 | case NFS4_SHARE_WANT_WRITE_DELEG: | |
5865 | case NFS4_SHARE_WANT_ANY_DELEG: | |
5866 | break; | |
5867 | case NFS4_SHARE_WANT_CANCEL: | |
5868 | open->op_why_no_deleg = WND4_CANCELLED; | |
5869 | break; | |
5870 | case NFS4_SHARE_WANT_NO_DELEG: | |
063b0fb9 | 5871 | WARN_ON_ONCE(1); |
4aa8913c BH |
5872 | } |
5873 | } | |
5874 | } | |
5875 | ||
1da177e4 | 5876 | /* |
1d3dd1d5 DN |
5877 | * The Linux NFS server does not offer write delegations to NFSv4.0 |
5878 | * clients in order to avoid conflicts between write delegations and | |
5879 | * GETATTRs requesting CHANGE or SIZE attributes. | |
5880 | * | |
5881 | * With NFSv4.1 and later minorversions, the SEQUENCE operation that | |
5882 | * begins each COMPOUND contains a client ID. Delegation recall can | |
5883 | * be avoided when the server recognizes the client sending a | |
5884 | * GETATTR also holds write delegation it conflicts with. | |
5885 | * | |
5886 | * However, the NFSv4.0 protocol does not enable a server to | |
5887 | * determine that a GETATTR originated from the client holding the | |
5888 | * conflicting delegation versus coming from some other client. Per | |
5889 | * RFC 7530 Section 16.7.5, the server must recall or send a | |
5890 | * CB_GETATTR even when the GETATTR originates from the client that | |
5891 | * holds the conflicting delegation. | |
99c41515 | 5892 | * |
1d3dd1d5 DN |
5893 | * An NFSv4.0 client can trigger a pathological situation if it |
5894 | * always sends a DELEGRETURN preceded by a conflicting GETATTR in | |
5895 | * the same COMPOUND. COMPOUND execution will always stop at the | |
5896 | * GETATTR and the DELEGRETURN will never get executed. The server | |
5897 | * eventually revokes the delegation, which can result in loss of | |
5898 | * open or lock state. | |
1da177e4 LT |
5899 | */ |
5900 | static void | |
876c553c JL |
5901 | nfs4_open_delegation(struct nfsd4_open *open, struct nfs4_ol_stateid *stp, |
5902 | struct svc_fh *currentfh) | |
1da177e4 LT |
5903 | { |
5904 | struct nfs4_delegation *dp; | |
4cf59221 JL |
5905 | struct nfs4_openowner *oo = openowner(stp->st_stateowner); |
5906 | struct nfs4_client *clp = stp->st_stid.sc_client; | |
876c553c | 5907 | struct svc_fh *parent = NULL; |
14a24e99 | 5908 | int cb_up; |
99c41515 | 5909 | int status = 0; |
c5967721 DN |
5910 | struct kstat stat; |
5911 | struct path path; | |
1da177e4 | 5912 | |
fe0750e5 | 5913 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
e4ad7ce7 | 5914 | open->op_recall = false; |
7b190fec N |
5915 | switch (open->op_claim_type) { |
5916 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 5917 | if (!cb_up) |
e4ad7ce7 | 5918 | open->op_recall = true; |
7b190fec N |
5919 | break; |
5920 | case NFS4_OPEN_CLAIM_NULL: | |
876c553c JL |
5921 | parent = currentfh; |
5922 | fallthrough; | |
ed47b062 | 5923 | case NFS4_OPEN_CLAIM_FH: |
99c41515 BF |
5924 | /* |
5925 | * Let's not give out any delegations till everyone's | |
c87fb4a3 BF |
5926 | * had the chance to reclaim theirs, *and* until |
5927 | * NLM locks have all been reclaimed: | |
99c41515 | 5928 | */ |
4cf59221 | 5929 | if (locks_in_grace(clp->net)) |
99c41515 | 5930 | goto out_no_deleg; |
dad1c067 | 5931 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
99c41515 | 5932 | goto out_no_deleg; |
1d3dd1d5 DN |
5933 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE && |
5934 | !clp->cl_minorversion) | |
5935 | goto out_no_deleg; | |
7b190fec N |
5936 | break; |
5937 | default: | |
99c41515 | 5938 | goto out_no_deleg; |
7b190fec | 5939 | } |
876c553c | 5940 | dp = nfs4_set_delegation(open, stp, parent); |
0b26693c | 5941 | if (IS_ERR(dp)) |
dd239cc0 | 5942 | goto out_no_deleg; |
1da177e4 | 5943 | |
d5477a8d | 5944 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 5945 | |
1d3dd1d5 DN |
5946 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) { |
5947 | open->op_delegate_type = NFS4_OPEN_DELEGATE_WRITE; | |
5948 | trace_nfsd_deleg_write(&dp->dl_stid.sc_stateid); | |
c5967721 DN |
5949 | path.mnt = currentfh->fh_export->ex_path.mnt; |
5950 | path.dentry = currentfh->fh_dentry; | |
5951 | if (vfs_getattr(&path, &stat, | |
5952 | (STATX_SIZE | STATX_CTIME | STATX_CHANGE_COOKIE), | |
5953 | AT_STATX_SYNC_AS_STAT)) { | |
5954 | nfs4_put_stid(&dp->dl_stid); | |
5955 | destroy_delegation(dp); | |
5956 | goto out_no_deleg; | |
5957 | } | |
5958 | dp->dl_cb_fattr.ncf_cur_fsize = stat.size; | |
5959 | dp->dl_cb_fattr.ncf_initial_cinfo = | |
5960 | nfsd4_change_attribute(&stat, d_inode(currentfh->fh_dentry)); | |
1d3dd1d5 DN |
5961 | } else { |
5962 | open->op_delegate_type = NFS4_OPEN_DELEGATE_READ; | |
5963 | trace_nfsd_deleg_read(&dp->dl_stid.sc_stateid); | |
5964 | } | |
67cb1279 | 5965 | nfs4_put_stid(&dp->dl_stid); |
dd239cc0 | 5966 | return; |
dd239cc0 | 5967 | out_no_deleg: |
99c41515 BF |
5968 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE; |
5969 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && | |
d08d32e6 | 5970 | open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) { |
99c41515 | 5971 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
e4ad7ce7 | 5972 | open->op_recall = true; |
d08d32e6 | 5973 | } |
99c41515 BF |
5974 | |
5975 | /* 4.1 client asking for a delegation? */ | |
5976 | if (open->op_deleg_want) | |
5977 | nfsd4_open_deleg_none_ext(open, status); | |
5978 | return; | |
1da177e4 LT |
5979 | } |
5980 | ||
e27f49c3 BH |
5981 | static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, |
5982 | struct nfs4_delegation *dp) | |
5983 | { | |
5984 | if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && | |
5985 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
5986 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
5987 | open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; | |
5988 | } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && | |
5989 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
5990 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
5991 | open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; | |
5992 | } | |
5993 | /* Otherwise the client must be confused wanting a delegation | |
5994 | * it already has, therefore we don't return | |
5995 | * NFS4_OPEN_DELEGATE_NONE_EXT and reason. | |
5996 | */ | |
5997 | } | |
5998 | ||
7e2ce0cc CL |
5999 | /** |
6000 | * nfsd4_process_open2 - finish open processing | |
6001 | * @rqstp: the RPC transaction being executed | |
6002 | * @current_fh: NFSv4 COMPOUND's current filehandle | |
6003 | * @open: OPEN arguments | |
6004 | * | |
6005 | * If successful, (1) truncate the file if open->op_truncate was | |
6006 | * set, (2) set open->op_stateid, (3) set open->op_delegation. | |
6007 | * | |
6008 | * Returns %nfs_ok on success; otherwise an nfs4stat value in | |
6009 | * network byte order is returned. | |
6010 | */ | |
b37ad28b | 6011 | __be32 |
1da177e4 LT |
6012 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
6013 | { | |
6668958f | 6014 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
38c2f4b1 | 6015 | struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; |
1da177e4 | 6016 | struct nfs4_file *fp = NULL; |
dcef0413 | 6017 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 6018 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 6019 | __be32 status; |
d8a1a000 | 6020 | bool new_stp = false; |
1da177e4 | 6021 | |
1da177e4 LT |
6022 | /* |
6023 | * Lookup file; if found, lookup stateid and check open request, | |
6024 | * and check for delegations in the process of being recalled. | |
6025 | * If not found, create the nfs4_file struct | |
6026 | */ | |
9270fc51 | 6027 | fp = nfsd4_file_hash_insert(open->op_file, current_fh); |
d47b295e CL |
6028 | if (unlikely(!fp)) |
6029 | return nfserr_jukebox; | |
950e0118 | 6030 | if (fp != open->op_file) { |
41d22663 | 6031 | status = nfs4_check_deleg(cl, open, &dp); |
c44c5eeb N |
6032 | if (status) |
6033 | goto out; | |
15ca08d3 | 6034 | stp = nfsd4_find_and_lock_existing_open(fp, open); |
1da177e4 | 6035 | } else { |
950e0118 | 6036 | open->op_file = NULL; |
c44c5eeb | 6037 | status = nfserr_bad_stateid; |
8b289b2c | 6038 | if (nfsd4_is_deleg_cur(open)) |
c44c5eeb | 6039 | goto out; |
1da177e4 LT |
6040 | } |
6041 | ||
d8a1a000 TM |
6042 | if (!stp) { |
6043 | stp = init_open_stateid(fp, open); | |
6044 | if (!open->op_stp) | |
6045 | new_stp = true; | |
6046 | } | |
6047 | ||
1da177e4 LT |
6048 | /* |
6049 | * OPEN the file, or upgrade an existing OPEN. | |
6050 | * If truncate fails, the OPEN fails. | |
d8a1a000 TM |
6051 | * |
6052 | * stp is already locked. | |
1da177e4 | 6053 | */ |
d8a1a000 | 6054 | if (!new_stp) { |
1da177e4 | 6055 | /* Stateid was found, this is an OPEN upgrade */ |
f9d7562f | 6056 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
35a92fe8 | 6057 | if (status) { |
feb9dad5 | 6058 | mutex_unlock(&stp->st_mutex); |
1da177e4 | 6059 | goto out; |
35a92fe8 | 6060 | } |
1da177e4 | 6061 | } else { |
3d694271 | 6062 | status = nfs4_get_vfs_file(rqstp, fp, current_fh, stp, open, true); |
6eb3a1d0 JL |
6063 | if (status) { |
6064 | release_open_stateid(stp); | |
d8a1a000 | 6065 | mutex_unlock(&stp->st_mutex); |
6eb3a1d0 JL |
6066 | goto out; |
6067 | } | |
8287f009 SB |
6068 | |
6069 | stp->st_clnt_odstate = find_or_hash_clnt_odstate(fp, | |
6070 | open->op_odstate); | |
6071 | if (stp->st_clnt_odstate == open->op_odstate) | |
6072 | open->op_odstate = NULL; | |
1da177e4 | 6073 | } |
d8a1a000 | 6074 | |
9767feb2 | 6075 | nfs4_inc_and_copy_stateid(&open->op_stateid, &stp->st_stid); |
feb9dad5 | 6076 | mutex_unlock(&stp->st_mutex); |
1da177e4 | 6077 | |
d24433cd | 6078 | if (nfsd4_has_session(&resp->cstate)) { |
d24433cd BH |
6079 | if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { |
6080 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
6081 | open->op_why_no_deleg = WND4_NOT_WANTED; | |
6082 | goto nodeleg; | |
6083 | } | |
6084 | } | |
6085 | ||
1da177e4 LT |
6086 | /* |
6087 | * Attempt to hand out a delegation. No error return, because the | |
6088 | * OPEN succeeds even if we fail. | |
6089 | */ | |
876c553c | 6090 | nfs4_open_delegation(open, stp, &resp->cstate.current_fh); |
d24433cd | 6091 | nodeleg: |
1da177e4 | 6092 | status = nfs_ok; |
3caf9175 | 6093 | trace_nfsd_open(&stp->st_stid.sc_stateid); |
1da177e4 | 6094 | out: |
d24433cd BH |
6095 | /* 4.1 client trying to upgrade/downgrade delegation? */ |
6096 | if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && | |
e27f49c3 BH |
6097 | open->op_deleg_want) |
6098 | nfsd4_deleg_xgrade_none_ext(open, dp); | |
d24433cd | 6099 | |
13cd2184 N |
6100 | if (fp) |
6101 | put_nfs4_file(fp); | |
37515177 | 6102 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
87186022 | 6103 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
1da177e4 LT |
6104 | /* |
6105 | * To finish the open response, we just need to set the rflags. | |
6106 | */ | |
6107 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
19e4c347 JL |
6108 | if (nfsd4_has_session(&resp->cstate)) |
6109 | open->op_rflags |= NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK; | |
6110 | else if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED)) | |
1da177e4 | 6111 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
19e4c347 | 6112 | |
dcd94cc2 TM |
6113 | if (dp) |
6114 | nfs4_put_stid(&dp->dl_stid); | |
d6f2bc5d TM |
6115 | if (stp) |
6116 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 LT |
6117 | |
6118 | return status; | |
6119 | } | |
6120 | ||
58fb12e6 | 6121 | void nfsd4_cleanup_open_state(struct nfsd4_compound_state *cstate, |
42297899 | 6122 | struct nfsd4_open *open) |
d29b20cd BF |
6123 | { |
6124 | if (open->op_openowner) { | |
d3134b10 JL |
6125 | struct nfs4_stateowner *so = &open->op_openowner->oo_owner; |
6126 | ||
6127 | nfsd4_cstate_assign_replay(cstate, so); | |
6128 | nfs4_put_stateowner(so); | |
d29b20cd | 6129 | } |
32513b40 | 6130 | if (open->op_file) |
5b095e99 | 6131 | kmem_cache_free(file_slab, open->op_file); |
4cdc951b | 6132 | if (open->op_stp) |
6011695d | 6133 | nfs4_put_stid(&open->op_stp->st_stid); |
8287f009 SB |
6134 | if (open->op_odstate) |
6135 | kmem_cache_free(odstate_slab, open->op_odstate); | |
d29b20cd BF |
6136 | } |
6137 | ||
b37ad28b | 6138 | __be32 |
b591480b | 6139 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 6140 | union nfsd4_op_u *u) |
1da177e4 | 6141 | { |
eb69853d | 6142 | clientid_t *clid = &u->renew; |
1da177e4 | 6143 | struct nfs4_client *clp; |
b37ad28b | 6144 | __be32 status; |
7f2210fa | 6145 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 6146 | |
dd5e3fbc | 6147 | trace_nfsd_clid_renew(clid); |
f71475ba | 6148 | status = set_client(clid, cstate, nn); |
9b2ef62b | 6149 | if (status) |
b4587eb2 | 6150 | return status; |
4b24ca7d | 6151 | clp = cstate->clp; |
ea1da636 | 6152 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 6153 | && clp->cl_cb_state != NFSD4_CB_UP) |
b4587eb2 BF |
6154 | return nfserr_cb_path_down; |
6155 | return nfs_ok; | |
1da177e4 LT |
6156 | } |
6157 | ||
7f5ef2e9 | 6158 | void |
12760c66 | 6159 | nfsd4_end_grace(struct nfsd_net *nn) |
a76b4319 | 6160 | { |
33dcc481 | 6161 | /* do nothing if grace period already ended */ |
a51c84ed | 6162 | if (nn->grace_ended) |
33dcc481 JL |
6163 | return; |
6164 | ||
dd5e3fbc | 6165 | trace_nfsd_grace_complete(nn); |
a51c84ed | 6166 | nn->grace_ended = true; |
70b28235 BF |
6167 | /* |
6168 | * If the server goes down again right now, an NFSv4 | |
6169 | * client will still be allowed to reclaim after it comes back up, | |
6170 | * even if it hasn't yet had a chance to reclaim state this time. | |
6171 | * | |
6172 | */ | |
919b8049 | 6173 | nfsd4_record_grace_done(nn); |
70b28235 BF |
6174 | /* |
6175 | * At this point, NFSv4 clients can still reclaim. But if the | |
6176 | * server crashes, any that have not yet reclaimed will be out | |
6177 | * of luck on the next boot. | |
6178 | * | |
6179 | * (NFSv4.1+ clients are considered to have reclaimed once they | |
6180 | * call RECLAIM_COMPLETE. NFSv4.0 clients are considered to | |
6181 | * have reclaimed after their first OPEN.) | |
6182 | */ | |
5e1533c7 | 6183 | locks_end_grace(&nn->nfsd4_manager); |
70b28235 BF |
6184 | /* |
6185 | * At this point, and once lockd and/or any other containers | |
6186 | * exit their grace period, further reclaims will fail and | |
6187 | * regular locking can resume. | |
6188 | */ | |
a76b4319 N |
6189 | } |
6190 | ||
03f318ca BF |
6191 | /* |
6192 | * If we've waited a lease period but there are still clients trying to | |
6193 | * reclaim, wait a little longer to give them a chance to finish. | |
6194 | */ | |
6195 | static bool clients_still_reclaiming(struct nfsd_net *nn) | |
6196 | { | |
20b7d86f AB |
6197 | time64_t double_grace_period_end = nn->boot_time + |
6198 | 2 * nn->nfsd4_lease; | |
03f318ca | 6199 | |
362063a5 SM |
6200 | if (nn->track_reclaim_completes && |
6201 | atomic_read(&nn->nr_reclaim_complete) == | |
6202 | nn->reclaim_str_hashtbl_size) | |
6203 | return false; | |
03f318ca BF |
6204 | if (!nn->somebody_reclaimed) |
6205 | return false; | |
6206 | nn->somebody_reclaimed = false; | |
6207 | /* | |
6208 | * If we've given them *two* lease times to reclaim, and they're | |
6209 | * still not done, give up: | |
6210 | */ | |
20b7d86f | 6211 | if (ktime_get_boottime_seconds() > double_grace_period_end) |
03f318ca BF |
6212 | return false; |
6213 | return true; | |
6214 | } | |
6215 | ||
7f7e7a40 BF |
6216 | struct laundry_time { |
6217 | time64_t cutoff; | |
6218 | time64_t new_timeo; | |
6219 | }; | |
6220 | ||
6221 | static bool state_expired(struct laundry_time *lt, time64_t last_refresh) | |
6222 | { | |
6223 | time64_t time_remaining; | |
6224 | ||
6225 | if (last_refresh < lt->cutoff) | |
6226 | return true; | |
6227 | time_remaining = last_refresh - lt->cutoff; | |
6228 | lt->new_timeo = min(lt->new_timeo, time_remaining); | |
6229 | return false; | |
6230 | } | |
6231 | ||
f4e44b39 DN |
6232 | #ifdef CONFIG_NFSD_V4_2_INTER_SSC |
6233 | void nfsd4_ssc_init_umount_work(struct nfsd_net *nn) | |
6234 | { | |
6235 | spin_lock_init(&nn->nfsd_ssc_lock); | |
6236 | INIT_LIST_HEAD(&nn->nfsd_ssc_mount_list); | |
6237 | init_waitqueue_head(&nn->nfsd_ssc_waitq); | |
6238 | } | |
6239 | EXPORT_SYMBOL_GPL(nfsd4_ssc_init_umount_work); | |
6240 | ||
6241 | /* | |
6242 | * This is called when nfsd is being shutdown, after all inter_ssc | |
6243 | * cleanup were done, to destroy the ssc delayed unmount list. | |
6244 | */ | |
6245 | static void nfsd4_ssc_shutdown_umount(struct nfsd_net *nn) | |
6246 | { | |
f47dc2d3 | 6247 | struct nfsd4_ssc_umount_item *ni = NULL; |
f4e44b39 DN |
6248 | struct nfsd4_ssc_umount_item *tmp; |
6249 | ||
6250 | spin_lock(&nn->nfsd_ssc_lock); | |
6251 | list_for_each_entry_safe(ni, tmp, &nn->nfsd_ssc_mount_list, nsui_list) { | |
6252 | list_del(&ni->nsui_list); | |
6253 | spin_unlock(&nn->nfsd_ssc_lock); | |
6254 | mntput(ni->nsui_vfsmount); | |
6255 | kfree(ni); | |
6256 | spin_lock(&nn->nfsd_ssc_lock); | |
6257 | } | |
6258 | spin_unlock(&nn->nfsd_ssc_lock); | |
6259 | } | |
6260 | ||
6261 | static void nfsd4_ssc_expire_umount(struct nfsd_net *nn) | |
6262 | { | |
6263 | bool do_wakeup = false; | |
8e70bf27 | 6264 | struct nfsd4_ssc_umount_item *ni = NULL; |
f4e44b39 DN |
6265 | struct nfsd4_ssc_umount_item *tmp; |
6266 | ||
6267 | spin_lock(&nn->nfsd_ssc_lock); | |
6268 | list_for_each_entry_safe(ni, tmp, &nn->nfsd_ssc_mount_list, nsui_list) { | |
6269 | if (time_after(jiffies, ni->nsui_expire)) { | |
6270 | if (refcount_read(&ni->nsui_refcnt) > 1) | |
6271 | continue; | |
6272 | ||
6273 | /* mark being unmount */ | |
6274 | ni->nsui_busy = true; | |
6275 | spin_unlock(&nn->nfsd_ssc_lock); | |
6276 | mntput(ni->nsui_vfsmount); | |
6277 | spin_lock(&nn->nfsd_ssc_lock); | |
6278 | ||
6279 | /* waiters need to start from begin of list */ | |
6280 | list_del(&ni->nsui_list); | |
6281 | kfree(ni); | |
6282 | ||
6283 | /* wakeup ssc_connect waiters */ | |
6284 | do_wakeup = true; | |
6285 | continue; | |
6286 | } | |
6287 | break; | |
6288 | } | |
6289 | if (do_wakeup) | |
6290 | wake_up_all(&nn->nfsd_ssc_waitq); | |
6291 | spin_unlock(&nn->nfsd_ssc_lock); | |
6292 | } | |
6293 | #endif | |
6294 | ||
27431aff | 6295 | /* Check if any lock belonging to this lockowner has any blockers */ |
3d694271 | 6296 | static bool |
27431aff DN |
6297 | nfs4_lockowner_has_blockers(struct nfs4_lockowner *lo) |
6298 | { | |
6299 | struct file_lock_context *ctx; | |
6300 | struct nfs4_ol_stateid *stp; | |
6301 | struct nfs4_file *nf; | |
6302 | ||
6303 | list_for_each_entry(stp, &lo->lo_owner.so_stateids, st_perstateowner) { | |
6304 | nf = stp->st_stid.sc_file; | |
77c67530 | 6305 | ctx = locks_inode_context(nf->fi_inode); |
27431aff DN |
6306 | if (!ctx) |
6307 | continue; | |
6308 | if (locks_owner_has_blockers(ctx, lo)) | |
6309 | return true; | |
6310 | } | |
6311 | return false; | |
6312 | } | |
6313 | ||
6314 | static bool | |
6315 | nfs4_anylock_blockers(struct nfs4_client *clp) | |
3d694271 DN |
6316 | { |
6317 | int i; | |
6318 | struct nfs4_stateowner *so; | |
27431aff | 6319 | struct nfs4_lockowner *lo; |
3d694271 | 6320 | |
27431aff DN |
6321 | if (atomic_read(&clp->cl_delegs_in_recall)) |
6322 | return true; | |
3d694271 DN |
6323 | spin_lock(&clp->cl_lock); |
6324 | for (i = 0; i < OWNER_HASH_SIZE; i++) { | |
6325 | list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[i], | |
6326 | so_strhash) { | |
6327 | if (so->so_is_open_owner) | |
6328 | continue; | |
27431aff DN |
6329 | lo = lockowner(so); |
6330 | if (nfs4_lockowner_has_blockers(lo)) { | |
6331 | spin_unlock(&clp->cl_lock); | |
6332 | return true; | |
6333 | } | |
3d694271 DN |
6334 | } |
6335 | } | |
6336 | spin_unlock(&clp->cl_lock); | |
6337 | return false; | |
6338 | } | |
6339 | ||
66af2579 DN |
6340 | static void |
6341 | nfs4_get_client_reaplist(struct nfsd_net *nn, struct list_head *reaplist, | |
6342 | struct laundry_time *lt) | |
6343 | { | |
4271c2c0 | 6344 | unsigned int maxreap, reapcnt = 0; |
66af2579 DN |
6345 | struct list_head *pos, *next; |
6346 | struct nfs4_client *clp; | |
6347 | ||
4271c2c0 DN |
6348 | maxreap = (atomic_read(&nn->nfs4_client_count) >= nn->nfs4_max_clients) ? |
6349 | NFSD_CLIENT_MAX_TRIM_PER_RUN : 0; | |
66af2579 DN |
6350 | INIT_LIST_HEAD(reaplist); |
6351 | spin_lock(&nn->client_lock); | |
6352 | list_for_each_safe(pos, next, &nn->client_lru) { | |
6353 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
6354 | if (clp->cl_state == NFSD4_EXPIRABLE) | |
6355 | goto exp_client; | |
6356 | if (!state_expired(lt, clp->cl_time)) | |
6357 | break; | |
3a4ea23d DN |
6358 | if (!atomic_read(&clp->cl_rpc_users)) { |
6359 | if (clp->cl_state == NFSD4_ACTIVE) | |
6360 | atomic_inc(&nn->nfsd_courtesy_clients); | |
66af2579 | 6361 | clp->cl_state = NFSD4_COURTESY; |
3a4ea23d | 6362 | } |
4271c2c0 | 6363 | if (!client_has_state(clp)) |
66af2579 | 6364 | goto exp_client; |
4271c2c0 DN |
6365 | if (!nfs4_anylock_blockers(clp)) |
6366 | if (reapcnt >= maxreap) | |
6367 | continue; | |
66af2579 | 6368 | exp_client: |
4271c2c0 DN |
6369 | if (!mark_client_expired_locked(clp)) { |
6370 | list_add(&clp->cl_lru, reaplist); | |
6371 | reapcnt++; | |
66af2579 DN |
6372 | } |
6373 | } | |
6374 | spin_unlock(&nn->client_lock); | |
6375 | } | |
6376 | ||
7746b32f DN |
6377 | static void |
6378 | nfs4_get_courtesy_client_reaplist(struct nfsd_net *nn, | |
6379 | struct list_head *reaplist) | |
6380 | { | |
6381 | unsigned int maxreap = 0, reapcnt = 0; | |
6382 | struct list_head *pos, *next; | |
6383 | struct nfs4_client *clp; | |
6384 | ||
6385 | maxreap = NFSD_CLIENT_MAX_TRIM_PER_RUN; | |
6386 | INIT_LIST_HEAD(reaplist); | |
6387 | ||
6388 | spin_lock(&nn->client_lock); | |
6389 | list_for_each_safe(pos, next, &nn->client_lru) { | |
6390 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
6391 | if (clp->cl_state == NFSD4_ACTIVE) | |
6392 | break; | |
6393 | if (reapcnt >= maxreap) | |
6394 | break; | |
6395 | if (!mark_client_expired_locked(clp)) { | |
6396 | list_add(&clp->cl_lru, reaplist); | |
6397 | reapcnt++; | |
6398 | } | |
6399 | } | |
6400 | spin_unlock(&nn->client_lock); | |
6401 | } | |
6402 | ||
6403 | static void | |
6404 | nfs4_process_client_reaplist(struct list_head *reaplist) | |
6405 | { | |
6406 | struct list_head *pos, *next; | |
6407 | struct nfs4_client *clp; | |
6408 | ||
6409 | list_for_each_safe(pos, next, reaplist) { | |
6410 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
6411 | trace_nfsd_clid_purged(&clp->cl_clientid); | |
6412 | list_del_init(&clp->cl_lru); | |
6413 | expire_client(clp); | |
6414 | } | |
6415 | } | |
6416 | ||
d688d858 N |
6417 | static void nfs40_clean_admin_revoked(struct nfsd_net *nn, |
6418 | struct laundry_time *lt) | |
6419 | { | |
6420 | struct nfs4_client *clp; | |
6421 | ||
6422 | spin_lock(&nn->client_lock); | |
6423 | if (nn->nfs40_last_revoke == 0 || | |
6424 | nn->nfs40_last_revoke > lt->cutoff) { | |
6425 | spin_unlock(&nn->client_lock); | |
6426 | return; | |
6427 | } | |
6428 | nn->nfs40_last_revoke = 0; | |
6429 | ||
6430 | retry: | |
6431 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
6432 | unsigned long id, tmp; | |
6433 | struct nfs4_stid *stid; | |
6434 | ||
6435 | if (atomic_read(&clp->cl_admin_revoked) == 0) | |
6436 | continue; | |
6437 | ||
6438 | spin_lock(&clp->cl_lock); | |
6439 | idr_for_each_entry_ul(&clp->cl_stateids, stid, tmp, id) | |
6440 | if (stid->sc_status & SC_STATUS_ADMIN_REVOKED) { | |
6441 | refcount_inc(&stid->sc_count); | |
6442 | spin_unlock(&nn->client_lock); | |
6443 | /* this function drops ->cl_lock */ | |
6444 | nfsd4_drop_revoked_stid(stid); | |
6445 | nfs4_put_stid(stid); | |
6446 | spin_lock(&nn->client_lock); | |
6447 | goto retry; | |
6448 | } | |
6449 | spin_unlock(&clp->cl_lock); | |
6450 | } | |
6451 | spin_unlock(&nn->client_lock); | |
6452 | } | |
6453 | ||
20b7d86f | 6454 | static time64_t |
09121281 | 6455 | nfs4_laundromat(struct nfsd_net *nn) |
1da177e4 | 6456 | { |
fe0750e5 | 6457 | struct nfs4_openowner *oo; |
1da177e4 | 6458 | struct nfs4_delegation *dp; |
217526e7 | 6459 | struct nfs4_ol_stateid *stp; |
7919d0a2 | 6460 | struct nfsd4_blocked_lock *nbl; |
1da177e4 | 6461 | struct list_head *pos, *next, reaplist; |
7f7e7a40 BF |
6462 | struct laundry_time lt = { |
6463 | .cutoff = ktime_get_boottime_seconds() - nn->nfsd4_lease, | |
6464 | .new_timeo = nn->nfsd4_lease | |
6465 | }; | |
624322f1 OK |
6466 | struct nfs4_cpntf_state *cps; |
6467 | copy_stateid_t *cps_t; | |
6468 | int i; | |
1da177e4 | 6469 | |
03f318ca | 6470 | if (clients_still_reclaiming(nn)) { |
7f7e7a40 | 6471 | lt.new_timeo = 0; |
03f318ca BF |
6472 | goto out; |
6473 | } | |
12760c66 | 6474 | nfsd4_end_grace(nn); |
624322f1 OK |
6475 | |
6476 | spin_lock(&nn->s2s_cp_lock); | |
6477 | idr_for_each_entry(&nn->s2s_cp_stateids, cps_t, i) { | |
6478 | cps = container_of(cps_t, struct nfs4_cpntf_state, cp_stateid); | |
781fde1a | 6479 | if (cps->cp_stateid.cs_type == NFS4_COPYNOTIFY_STID && |
7f7e7a40 | 6480 | state_expired(<, cps->cpntf_time)) |
624322f1 OK |
6481 | _free_cpntf_state_locked(nn, cps); |
6482 | } | |
6483 | spin_unlock(&nn->s2s_cp_lock); | |
66af2579 | 6484 | nfs4_get_client_reaplist(nn, &reaplist, <); |
7746b32f DN |
6485 | nfs4_process_client_reaplist(&reaplist); |
6486 | ||
d688d858 N |
6487 | nfs40_clean_admin_revoked(nn, <); |
6488 | ||
cdc97505 | 6489 | spin_lock(&state_lock); |
e8c69d17 | 6490 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 | 6491 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
7f7e7a40 | 6492 | if (!state_expired(<, dp->dl_time)) |
1da177e4 | 6493 | break; |
3f29cc82 | 6494 | unhash_delegation_locked(dp, SC_STATUS_REVOKED); |
42690676 | 6495 | list_add(&dp->dl_recall_lru, &reaplist); |
1da177e4 | 6496 | } |
cdc97505 | 6497 | spin_unlock(&state_lock); |
2d4a532d JL |
6498 | while (!list_empty(&reaplist)) { |
6499 | dp = list_first_entry(&reaplist, struct nfs4_delegation, | |
6500 | dl_recall_lru); | |
6501 | list_del_init(&dp->dl_recall_lru); | |
3bd64a5b | 6502 | revoke_delegation(dp); |
1da177e4 | 6503 | } |
217526e7 JL |
6504 | |
6505 | spin_lock(&nn->client_lock); | |
6506 | while (!list_empty(&nn->close_lru)) { | |
6507 | oo = list_first_entry(&nn->close_lru, struct nfs4_openowner, | |
6508 | oo_close_lru); | |
7f7e7a40 | 6509 | if (!state_expired(<, oo->oo_time)) |
1da177e4 | 6510 | break; |
217526e7 JL |
6511 | list_del_init(&oo->oo_close_lru); |
6512 | stp = oo->oo_last_closed_stid; | |
6513 | oo->oo_last_closed_stid = NULL; | |
6514 | spin_unlock(&nn->client_lock); | |
6515 | nfs4_put_stid(&stp->st_stid); | |
6516 | spin_lock(&nn->client_lock); | |
1da177e4 | 6517 | } |
217526e7 JL |
6518 | spin_unlock(&nn->client_lock); |
6519 | ||
7919d0a2 JL |
6520 | /* |
6521 | * It's possible for a client to try and acquire an already held lock | |
6522 | * that is being held for a long time, and then lose interest in it. | |
6523 | * So, we clean out any un-revisited request after a lease period | |
6524 | * under the assumption that the client is no longer interested. | |
6525 | * | |
6526 | * RFC5661, sec. 9.6 states that the client must not rely on getting | |
6527 | * notifications and must continue to poll for locks, even when the | |
6528 | * server supports them. Thus this shouldn't lead to clients blocking | |
6529 | * indefinitely once the lock does become free. | |
6530 | */ | |
6531 | BUG_ON(!list_empty(&reaplist)); | |
0cc11a61 | 6532 | spin_lock(&nn->blocked_locks_lock); |
7919d0a2 JL |
6533 | while (!list_empty(&nn->blocked_locks_lru)) { |
6534 | nbl = list_first_entry(&nn->blocked_locks_lru, | |
6535 | struct nfsd4_blocked_lock, nbl_lru); | |
7f7e7a40 | 6536 | if (!state_expired(<, nbl->nbl_time)) |
7919d0a2 | 6537 | break; |
7919d0a2 JL |
6538 | list_move(&nbl->nbl_lru, &reaplist); |
6539 | list_del_init(&nbl->nbl_list); | |
6540 | } | |
0cc11a61 | 6541 | spin_unlock(&nn->blocked_locks_lock); |
7919d0a2 JL |
6542 | |
6543 | while (!list_empty(&reaplist)) { | |
64ebe124 | 6544 | nbl = list_first_entry(&reaplist, |
7919d0a2 JL |
6545 | struct nfsd4_blocked_lock, nbl_lru); |
6546 | list_del_init(&nbl->nbl_lru); | |
7919d0a2 JL |
6547 | free_blocked_lock(nbl); |
6548 | } | |
f4e44b39 DN |
6549 | #ifdef CONFIG_NFSD_V4_2_INTER_SSC |
6550 | /* service the server-to-server copy delayed unmount list */ | |
6551 | nfsd4_ssc_expire_umount(nn); | |
6552 | #endif | |
03f318ca | 6553 | out: |
7f7e7a40 | 6554 | return max_t(time64_t, lt.new_timeo, NFSD_LAUNDROMAT_MINTIMEOUT); |
1da177e4 LT |
6555 | } |
6556 | ||
a254b246 | 6557 | static void laundromat_main(struct work_struct *); |
a254b246 HH |
6558 | |
6559 | static void | |
09121281 | 6560 | laundromat_main(struct work_struct *laundry) |
1da177e4 | 6561 | { |
20b7d86f | 6562 | time64_t t; |
2e55f3ab | 6563 | struct delayed_work *dwork = to_delayed_work(laundry); |
09121281 SK |
6564 | struct nfsd_net *nn = container_of(dwork, struct nfsd_net, |
6565 | laundromat_work); | |
1da177e4 | 6566 | |
09121281 | 6567 | t = nfs4_laundromat(nn); |
09121281 | 6568 | queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ); |
1da177e4 LT |
6569 | } |
6570 | ||
7746b32f | 6571 | static void |
a1049eb4 | 6572 | courtesy_client_reaper(struct nfsd_net *nn) |
7746b32f DN |
6573 | { |
6574 | struct list_head reaplist; | |
7746b32f DN |
6575 | |
6576 | nfs4_get_courtesy_client_reaplist(nn, &reaplist); | |
6577 | nfs4_process_client_reaplist(&reaplist); | |
6578 | } | |
6579 | ||
44df6f43 DN |
6580 | static void |
6581 | deleg_reaper(struct nfsd_net *nn) | |
6582 | { | |
6583 | struct list_head *pos, *next; | |
6584 | struct nfs4_client *clp; | |
6585 | struct list_head cblist; | |
6586 | ||
6587 | INIT_LIST_HEAD(&cblist); | |
6588 | spin_lock(&nn->client_lock); | |
6589 | list_for_each_safe(pos, next, &nn->client_lru) { | |
6590 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
6591 | if (clp->cl_state != NFSD4_ACTIVE || | |
6592 | list_empty(&clp->cl_delegations) || | |
6593 | atomic_read(&clp->cl_delegs_in_recall) || | |
6594 | test_bit(NFSD4_CLIENT_CB_RECALL_ANY, &clp->cl_flags) || | |
6595 | (ktime_get_boottime_seconds() - | |
6596 | clp->cl_ra_time < 5)) { | |
6597 | continue; | |
6598 | } | |
6599 | list_add(&clp->cl_ra_cblist, &cblist); | |
6600 | ||
6601 | /* release in nfsd4_cb_recall_any_release */ | |
6602 | atomic_inc(&clp->cl_rpc_users); | |
6603 | set_bit(NFSD4_CLIENT_CB_RECALL_ANY, &clp->cl_flags); | |
6604 | clp->cl_ra_time = ktime_get_boottime_seconds(); | |
6605 | } | |
6606 | spin_unlock(&nn->client_lock); | |
6607 | ||
6608 | while (!list_empty(&cblist)) { | |
6609 | clp = list_first_entry(&cblist, struct nfs4_client, | |
6610 | cl_ra_cblist); | |
6611 | list_del_init(&clp->cl_ra_cblist); | |
6612 | clp->cl_ra->ra_keep = 0; | |
6613 | clp->cl_ra->ra_bmval[0] = BIT(RCA4_TYPE_MASK_RDATA_DLG); | |
638593be | 6614 | trace_nfsd_cb_recall_any(clp->cl_ra); |
44df6f43 DN |
6615 | nfsd4_run_cb(&clp->cl_ra->ra_cb); |
6616 | } | |
6617 | } | |
6618 | ||
a1049eb4 DN |
6619 | static void |
6620 | nfsd4_state_shrinker_worker(struct work_struct *work) | |
6621 | { | |
7c24fa22 | 6622 | struct nfsd_net *nn = container_of(work, struct nfsd_net, |
a1049eb4 DN |
6623 | nfsd_shrinker_work); |
6624 | ||
6625 | courtesy_client_reaper(nn); | |
44df6f43 | 6626 | deleg_reaper(nn); |
a1049eb4 DN |
6627 | } |
6628 | ||
8fcd461d | 6629 | static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stid *stp) |
1da177e4 | 6630 | { |
8fcd461d | 6631 | if (!fh_match(&fhp->fh_handle, &stp->sc_file->fi_fhandle)) |
f7a4d872 BF |
6632 | return nfserr_bad_stateid; |
6633 | return nfs_ok; | |
1da177e4 LT |
6634 | } |
6635 | ||
1da177e4 | 6636 | static |
dcef0413 | 6637 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
1da177e4 | 6638 | { |
b37ad28b | 6639 | __be32 status = nfserr_openmode; |
1da177e4 | 6640 | |
02921914 BF |
6641 | /* For lock stateid's, we test the parent open, not the lock: */ |
6642 | if (stp->st_openstp) | |
6643 | stp = stp->st_openstp; | |
82c5ff1b | 6644 | if ((flags & WR_STATE) && !access_permit_write(stp)) |
1da177e4 | 6645 | goto out; |
82c5ff1b | 6646 | if ((flags & RD_STATE) && !access_permit_read(stp)) |
1da177e4 LT |
6647 | goto out; |
6648 | status = nfs_ok; | |
6649 | out: | |
6650 | return status; | |
6651 | } | |
6652 | ||
b37ad28b | 6653 | static inline __be32 |
5ccb0066 | 6654 | check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags) |
1da177e4 | 6655 | { |
203a8c8e | 6656 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 6657 | return nfs_ok; |
c87fb4a3 | 6658 | else if (opens_in_grace(net)) { |
25985edc | 6659 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
6660 | * conflicting state; so we must wait out the grace period. */ |
6661 | return nfserr_grace; | |
6662 | } else if (flags & WR_STATE) | |
6663 | return nfs4_share_conflict(current_fh, | |
6664 | NFS4_SHARE_DENY_WRITE); | |
6665 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
6666 | return nfs4_share_conflict(current_fh, | |
6667 | NFS4_SHARE_DENY_READ); | |
6668 | } | |
6669 | ||
57b7b43b | 6670 | static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 6671 | { |
6668958f AA |
6672 | /* |
6673 | * When sessions are used the stateid generation number is ignored | |
6674 | * when it is zero. | |
6675 | */ | |
28dde241 | 6676 | if (has_session && in->si_generation == 0) |
81b82965 BF |
6677 | return nfs_ok; |
6678 | ||
6679 | if (in->si_generation == ref->si_generation) | |
6680 | return nfs_ok; | |
6668958f | 6681 | |
0836f587 | 6682 | /* If the client sends us a stateid from the future, it's buggy: */ |
14b7f4a1 | 6683 | if (nfsd4_stateid_generation_after(in, ref)) |
0836f587 BF |
6684 | return nfserr_bad_stateid; |
6685 | /* | |
81b82965 BF |
6686 | * However, we could see a stateid from the past, even from a |
6687 | * non-buggy client. For example, if the client sends a lock | |
6688 | * while some IO is outstanding, the lock may bump si_generation | |
6689 | * while the IO is still in flight. The client could avoid that | |
6690 | * situation by waiting for responses on all the IO requests, | |
6691 | * but better performance may result in retrying IO that | |
6692 | * receives an old_stateid error if requests are rarely | |
6693 | * reordered in flight: | |
0836f587 | 6694 | */ |
81b82965 | 6695 | return nfserr_old_stateid; |
0836f587 BF |
6696 | } |
6697 | ||
03da3169 TM |
6698 | static __be32 nfsd4_stid_check_stateid_generation(stateid_t *in, struct nfs4_stid *s, bool has_session) |
6699 | { | |
6700 | __be32 ret; | |
6701 | ||
6702 | spin_lock(&s->sc_lock); | |
6703 | ret = nfsd4_verify_open_stid(s); | |
6704 | if (ret == nfs_ok) | |
6705 | ret = check_stateid_generation(in, &s->sc_stateid, has_session); | |
6706 | spin_unlock(&s->sc_lock); | |
d688d858 N |
6707 | if (ret == nfserr_admin_revoked) |
6708 | nfsd40_drop_revoked_stid(s->sc_client, | |
6709 | &s->sc_stateid); | |
03da3169 TM |
6710 | return ret; |
6711 | } | |
6712 | ||
ebe9cb3b CH |
6713 | static __be32 nfsd4_check_openowner_confirmed(struct nfs4_ol_stateid *ols) |
6714 | { | |
6715 | if (ols->st_stateowner->so_is_open_owner && | |
6716 | !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) | |
6717 | return nfserr_bad_stateid; | |
6718 | return nfs_ok; | |
6719 | } | |
6720 | ||
7df302f7 | 6721 | static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) |
17456804 | 6722 | { |
97b7e3b6 | 6723 | struct nfs4_stid *s; |
1af71cc8 | 6724 | __be32 status = nfserr_bad_stateid; |
17456804 | 6725 | |
ae254dac AE |
6726 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid) || |
6727 | CLOSE_STATEID(stateid)) | |
1af71cc8 | 6728 | return status; |
1af71cc8 JL |
6729 | spin_lock(&cl->cl_lock); |
6730 | s = find_stateid_locked(cl, stateid); | |
97b7e3b6 | 6731 | if (!s) |
1af71cc8 | 6732 | goto out_unlock; |
03da3169 | 6733 | status = nfsd4_stid_check_stateid_generation(stateid, s, 1); |
17456804 | 6734 | if (status) |
1af71cc8 | 6735 | goto out_unlock; |
3f29cc82 N |
6736 | status = nfsd4_verify_open_stid(s); |
6737 | if (status) | |
6738 | goto out_unlock; | |
6739 | ||
23340032 | 6740 | switch (s->sc_type) { |
3f29cc82 | 6741 | case SC_TYPE_DELEG: |
1af71cc8 JL |
6742 | status = nfs_ok; |
6743 | break; | |
3f29cc82 N |
6744 | case SC_TYPE_OPEN: |
6745 | case SC_TYPE_LOCK: | |
ebe9cb3b | 6746 | status = nfsd4_check_openowner_confirmed(openlockstateid(s)); |
1af71cc8 | 6747 | break; |
23340032 BF |
6748 | default: |
6749 | printk("unknown stateid type %x\n", s->sc_type); | |
1af71cc8 | 6750 | status = nfserr_bad_stateid; |
23340032 | 6751 | } |
1af71cc8 JL |
6752 | out_unlock: |
6753 | spin_unlock(&cl->cl_lock); | |
d688d858 N |
6754 | if (status == nfserr_admin_revoked) |
6755 | nfsd40_drop_revoked_stid(cl, stateid); | |
1af71cc8 | 6756 | return status; |
17456804 BS |
6757 | } |
6758 | ||
cd61c522 | 6759 | __be32 |
2dd6e458 | 6760 | nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate, |
3f29cc82 N |
6761 | stateid_t *stateid, |
6762 | unsigned short typemask, unsigned short statusmask, | |
2dd6e458 | 6763 | struct nfs4_stid **s, struct nfsd_net *nn) |
38c2f4b1 | 6764 | { |
0eb6f20a | 6765 | __be32 status; |
4d01416a | 6766 | struct nfs4_stid *stid; |
95da1b3a AE |
6767 | bool return_revoked = false; |
6768 | ||
6769 | /* | |
6770 | * only return revoked delegations if explicitly asked. | |
6771 | * otherwise we report revoked or bad_stateid status. | |
6772 | */ | |
3f29cc82 | 6773 | if (statusmask & SC_STATUS_REVOKED) |
95da1b3a | 6774 | return_revoked = true; |
3f29cc82 N |
6775 | if (typemask & SC_TYPE_DELEG) |
6776 | /* Always allow REVOKED for DELEG so we can | |
6777 | * retturn the appropriate error. | |
6778 | */ | |
6779 | statusmask |= SC_STATUS_REVOKED; | |
38c2f4b1 | 6780 | |
1ac3629b N |
6781 | statusmask |= SC_STATUS_ADMIN_REVOKED; |
6782 | ||
ae254dac AE |
6783 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid) || |
6784 | CLOSE_STATEID(stateid)) | |
38c2f4b1 | 6785 | return nfserr_bad_stateid; |
f71475ba | 6786 | status = set_client(&stateid->si_opaque.so_clid, cstate, nn); |
a8a7c677 | 6787 | if (status == nfserr_stale_clientid) { |
4b24ca7d | 6788 | if (cstate->session) |
a8a7c677 | 6789 | return nfserr_bad_stateid; |
38c2f4b1 | 6790 | return nfserr_stale_stateid; |
a8a7c677 | 6791 | } |
0eb6f20a BF |
6792 | if (status) |
6793 | return status; | |
3f29cc82 | 6794 | stid = find_stateid_by_type(cstate->clp, stateid, typemask, statusmask); |
4d01416a | 6795 | if (!stid) |
38c2f4b1 | 6796 | return nfserr_bad_stateid; |
3f29cc82 | 6797 | if ((stid->sc_status & SC_STATUS_REVOKED) && !return_revoked) { |
4d01416a | 6798 | nfs4_put_stid(stid); |
3f29cc82 | 6799 | return nfserr_deleg_revoked; |
95da1b3a | 6800 | } |
1ac3629b | 6801 | if (stid->sc_status & SC_STATUS_ADMIN_REVOKED) { |
d688d858 | 6802 | nfsd40_drop_revoked_stid(cstate->clp, stateid); |
1ac3629b N |
6803 | nfs4_put_stid(stid); |
6804 | return nfserr_admin_revoked; | |
6805 | } | |
4d01416a | 6806 | *s = stid; |
38c2f4b1 | 6807 | return nfs_ok; |
38c2f4b1 BF |
6808 | } |
6809 | ||
eb82dd39 | 6810 | static struct nfsd_file * |
a0649b2d CH |
6811 | nfs4_find_file(struct nfs4_stid *s, int flags) |
6812 | { | |
bd6aaf78 JL |
6813 | struct nfsd_file *ret = NULL; |
6814 | ||
3f29cc82 | 6815 | if (!s || s->sc_status) |
af90f707 CH |
6816 | return NULL; |
6817 | ||
a0649b2d | 6818 | switch (s->sc_type) { |
3f29cc82 | 6819 | case SC_TYPE_DELEG: |
bd6aaf78 JL |
6820 | spin_lock(&s->sc_file->fi_lock); |
6821 | ret = nfsd_file_get(s->sc_file->fi_deleg_file); | |
6822 | spin_unlock(&s->sc_file->fi_lock); | |
6823 | break; | |
3f29cc82 N |
6824 | case SC_TYPE_OPEN: |
6825 | case SC_TYPE_LOCK: | |
a0649b2d | 6826 | if (flags & RD_STATE) |
bd6aaf78 | 6827 | ret = find_readable_file(s->sc_file); |
a0649b2d | 6828 | else |
bd6aaf78 | 6829 | ret = find_writeable_file(s->sc_file); |
a0649b2d CH |
6830 | } |
6831 | ||
bd6aaf78 | 6832 | return ret; |
a0649b2d CH |
6833 | } |
6834 | ||
6835 | static __be32 | |
d8836f77 | 6836 | nfs4_check_olstateid(struct nfs4_ol_stateid *ols, int flags) |
a0649b2d CH |
6837 | { |
6838 | __be32 status; | |
6839 | ||
a0649b2d CH |
6840 | status = nfsd4_check_openowner_confirmed(ols); |
6841 | if (status) | |
6842 | return status; | |
6843 | return nfs4_check_openmode(ols, flags); | |
6844 | } | |
6845 | ||
af90f707 CH |
6846 | static __be32 |
6847 | nfs4_check_file(struct svc_rqst *rqstp, struct svc_fh *fhp, struct nfs4_stid *s, | |
5c4583b2 | 6848 | struct nfsd_file **nfp, int flags) |
af90f707 CH |
6849 | { |
6850 | int acc = (flags & RD_STATE) ? NFSD_MAY_READ : NFSD_MAY_WRITE; | |
eb82dd39 | 6851 | struct nfsd_file *nf; |
af90f707 CH |
6852 | __be32 status; |
6853 | ||
eb82dd39 JL |
6854 | nf = nfs4_find_file(s, flags); |
6855 | if (nf) { | |
af90f707 CH |
6856 | status = nfsd_permission(rqstp, fhp->fh_export, fhp->fh_dentry, |
6857 | acc | NFSD_MAY_OWNER_OVERRIDE); | |
5c4583b2 JL |
6858 | if (status) { |
6859 | nfsd_file_put(nf); | |
eb82dd39 | 6860 | goto out; |
5c4583b2 | 6861 | } |
af90f707 | 6862 | } else { |
eb82dd39 | 6863 | status = nfsd_file_acquire(rqstp, fhp, acc, &nf); |
af90f707 CH |
6864 | if (status) |
6865 | return status; | |
af90f707 | 6866 | } |
5c4583b2 | 6867 | *nfp = nf; |
eb82dd39 | 6868 | out: |
eb82dd39 | 6869 | return status; |
af90f707 | 6870 | } |
624322f1 OK |
6871 | static void |
6872 | _free_cpntf_state_locked(struct nfsd_net *nn, struct nfs4_cpntf_state *cps) | |
6873 | { | |
781fde1a CL |
6874 | WARN_ON_ONCE(cps->cp_stateid.cs_type != NFS4_COPYNOTIFY_STID); |
6875 | if (!refcount_dec_and_test(&cps->cp_stateid.cs_count)) | |
624322f1 OK |
6876 | return; |
6877 | list_del(&cps->cp_list); | |
6878 | idr_remove(&nn->s2s_cp_stateids, | |
781fde1a | 6879 | cps->cp_stateid.cs_stid.si_opaque.so_id); |
624322f1 OK |
6880 | kfree(cps); |
6881 | } | |
b7342204 OK |
6882 | /* |
6883 | * A READ from an inter server to server COPY will have a | |
6884 | * copy stateid. Look up the copy notify stateid from the | |
6885 | * idr structure and take a reference on it. | |
6886 | */ | |
ce0887ac OK |
6887 | __be32 manage_cpntf_state(struct nfsd_net *nn, stateid_t *st, |
6888 | struct nfs4_client *clp, | |
6889 | struct nfs4_cpntf_state **cps) | |
b7342204 OK |
6890 | { |
6891 | copy_stateid_t *cps_t; | |
6892 | struct nfs4_cpntf_state *state = NULL; | |
6893 | ||
6894 | if (st->si_opaque.so_clid.cl_id != nn->s2s_cp_cl_id) | |
6895 | return nfserr_bad_stateid; | |
6896 | spin_lock(&nn->s2s_cp_lock); | |
6897 | cps_t = idr_find(&nn->s2s_cp_stateids, st->si_opaque.so_id); | |
6898 | if (cps_t) { | |
6899 | state = container_of(cps_t, struct nfs4_cpntf_state, | |
6900 | cp_stateid); | |
781fde1a | 6901 | if (state->cp_stateid.cs_type != NFS4_COPYNOTIFY_STID) { |
5277a79e DC |
6902 | state = NULL; |
6903 | goto unlock; | |
6904 | } | |
ce0887ac | 6905 | if (!clp) |
781fde1a | 6906 | refcount_inc(&state->cp_stateid.cs_count); |
ce0887ac OK |
6907 | else |
6908 | _free_cpntf_state_locked(nn, state); | |
b7342204 | 6909 | } |
5277a79e | 6910 | unlock: |
b7342204 OK |
6911 | spin_unlock(&nn->s2s_cp_lock); |
6912 | if (!state) | |
6913 | return nfserr_bad_stateid; | |
3c86e615 | 6914 | if (!clp) |
ce0887ac | 6915 | *cps = state; |
b7342204 OK |
6916 | return 0; |
6917 | } | |
6918 | ||
6919 | static __be32 find_cpntf_state(struct nfsd_net *nn, stateid_t *st, | |
6920 | struct nfs4_stid **stid) | |
6921 | { | |
6922 | __be32 status; | |
6923 | struct nfs4_cpntf_state *cps = NULL; | |
47fdb22d | 6924 | struct nfs4_client *found; |
b7342204 | 6925 | |
ce0887ac | 6926 | status = manage_cpntf_state(nn, st, NULL, &cps); |
b7342204 OK |
6927 | if (status) |
6928 | return status; | |
6929 | ||
20b7d86f | 6930 | cps->cpntf_time = ktime_get_boottime_seconds(); |
47fdb22d BF |
6931 | |
6932 | status = nfserr_expired; | |
6933 | found = lookup_clientid(&cps->cp_p_clid, true, nn); | |
6934 | if (!found) | |
b7342204 | 6935 | goto out; |
47fdb22d BF |
6936 | |
6937 | *stid = find_stateid_by_type(found, &cps->cp_p_stateid, | |
3f29cc82 N |
6938 | SC_TYPE_DELEG|SC_TYPE_OPEN|SC_TYPE_LOCK, |
6939 | 0); | |
47fdb22d BF |
6940 | if (*stid) |
6941 | status = nfs_ok; | |
6942 | else | |
6943 | status = nfserr_bad_stateid; | |
6944 | ||
6945 | put_client_renew(found); | |
b7342204 OK |
6946 | out: |
6947 | nfs4_put_cpntf_state(nn, cps); | |
6948 | return status; | |
6949 | } | |
624322f1 OK |
6950 | |
6951 | void nfs4_put_cpntf_state(struct nfsd_net *nn, struct nfs4_cpntf_state *cps) | |
6952 | { | |
6953 | spin_lock(&nn->s2s_cp_lock); | |
6954 | _free_cpntf_state_locked(nn, cps); | |
6955 | spin_unlock(&nn->s2s_cp_lock); | |
6956 | } | |
af90f707 | 6957 | |
ee97e730 JL |
6958 | /** |
6959 | * nfs4_preprocess_stateid_op - find and prep stateid for an operation | |
6960 | * @rqstp: incoming request from client | |
6961 | * @cstate: current compound state | |
6962 | * @fhp: filehandle associated with requested stateid | |
6963 | * @stateid: stateid (provided by client) | |
6964 | * @flags: flags describing type of operation to be done | |
6965 | * @nfp: optional nfsd_file return pointer (may be NULL) | |
6966 | * @cstid: optional returned nfs4_stid pointer (may be NULL) | |
6967 | * | |
6968 | * Given info from the client, look up a nfs4_stid for the operation. On | |
6969 | * success, it returns a reference to the nfs4_stid and/or the nfsd_file | |
6970 | * associated with it. | |
a0649b2d | 6971 | */ |
b37ad28b | 6972 | __be32 |
af90f707 | 6973 | nfs4_preprocess_stateid_op(struct svc_rqst *rqstp, |
aa0d6aed | 6974 | struct nfsd4_compound_state *cstate, struct svc_fh *fhp, |
624322f1 OK |
6975 | stateid_t *stateid, int flags, struct nfsd_file **nfp, |
6976 | struct nfs4_stid **cstid) | |
1da177e4 | 6977 | { |
af90f707 | 6978 | struct net *net = SVC_NET(rqstp); |
3320fef1 | 6979 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
af90f707 | 6980 | struct nfs4_stid *s = NULL; |
b37ad28b | 6981 | __be32 status; |
1da177e4 | 6982 | |
5c4583b2 JL |
6983 | if (nfp) |
6984 | *nfp = NULL; | |
1da177e4 | 6985 | |
af90f707 | 6986 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { |
074b07d9 BF |
6987 | if (cstid) |
6988 | status = nfserr_bad_stateid; | |
6989 | else | |
6990 | status = check_special_stateids(net, fhp, stateid, | |
6991 | flags); | |
af90f707 CH |
6992 | goto done; |
6993 | } | |
1da177e4 | 6994 | |
2dd6e458 | 6995 | status = nfsd4_lookup_stateid(cstate, stateid, |
3f29cc82 N |
6996 | SC_TYPE_DELEG|SC_TYPE_OPEN|SC_TYPE_LOCK, |
6997 | 0, &s, nn); | |
b7342204 OK |
6998 | if (status == nfserr_bad_stateid) |
6999 | status = find_cpntf_state(nn, stateid, &s); | |
38c2f4b1 | 7000 | if (status) |
c2d1d6a8 | 7001 | return status; |
03da3169 | 7002 | status = nfsd4_stid_check_stateid_generation(stateid, s, |
a0649b2d | 7003 | nfsd4_has_session(cstate)); |
69064a27 BF |
7004 | if (status) |
7005 | goto out; | |
a0649b2d | 7006 | |
f7a4d872 | 7007 | switch (s->sc_type) { |
3f29cc82 | 7008 | case SC_TYPE_DELEG: |
a0649b2d | 7009 | status = nfs4_check_delegmode(delegstateid(s), flags); |
f7a4d872 | 7010 | break; |
3f29cc82 N |
7011 | case SC_TYPE_OPEN: |
7012 | case SC_TYPE_LOCK: | |
d8836f77 | 7013 | status = nfs4_check_olstateid(openlockstateid(s), flags); |
f7a4d872 | 7014 | break; |
a0649b2d | 7015 | } |
8fcd461d JL |
7016 | if (status) |
7017 | goto out; | |
7018 | status = nfs4_check_fh(fhp, s); | |
a0649b2d | 7019 | |
af90f707 | 7020 | done: |
5c4583b2 JL |
7021 | if (status == nfs_ok && nfp) |
7022 | status = nfs4_check_file(rqstp, fhp, s, nfp, flags); | |
1da177e4 | 7023 | out: |
624322f1 OK |
7024 | if (s) { |
7025 | if (!status && cstid) | |
7026 | *cstid = s; | |
7027 | else | |
7028 | nfs4_put_stid(s); | |
7029 | } | |
1da177e4 LT |
7030 | return status; |
7031 | } | |
7032 | ||
17456804 BS |
7033 | /* |
7034 | * Test if the stateid is valid | |
7035 | */ | |
7036 | __be32 | |
7037 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
eb69853d | 7038 | union nfsd4_op_u *u) |
17456804 | 7039 | { |
eb69853d | 7040 | struct nfsd4_test_stateid *test_stateid = &u->test_stateid; |
03cfb420 | 7041 | struct nfsd4_test_stateid_id *stateid; |
ec59659b | 7042 | struct nfs4_client *cl = cstate->clp; |
03cfb420 | 7043 | |
03cfb420 | 7044 | list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) |
7df302f7 CL |
7045 | stateid->ts_id_status = |
7046 | nfsd4_validate_stateid(cl, &stateid->ts_id_stateid); | |
03cfb420 | 7047 | |
17456804 BS |
7048 | return nfs_ok; |
7049 | } | |
7050 | ||
42691398 CL |
7051 | static __be32 |
7052 | nfsd4_free_lock_stateid(stateid_t *stateid, struct nfs4_stid *s) | |
7053 | { | |
7054 | struct nfs4_ol_stateid *stp = openlockstateid(s); | |
7055 | __be32 ret; | |
7056 | ||
659aefb6 TM |
7057 | ret = nfsd4_lock_ol_stateid(stp); |
7058 | if (ret) | |
7059 | goto out_put_stid; | |
42691398 CL |
7060 | |
7061 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); | |
7062 | if (ret) | |
7063 | goto out; | |
7064 | ||
7065 | ret = nfserr_locks_held; | |
7066 | if (check_for_locks(stp->st_stid.sc_file, | |
7067 | lockowner(stp->st_stateowner))) | |
7068 | goto out; | |
7069 | ||
7070 | release_lock_stateid(stp); | |
7071 | ret = nfs_ok; | |
7072 | ||
7073 | out: | |
7074 | mutex_unlock(&stp->st_mutex); | |
659aefb6 | 7075 | out_put_stid: |
42691398 CL |
7076 | nfs4_put_stid(s); |
7077 | return ret; | |
7078 | } | |
7079 | ||
e1ca12df BS |
7080 | __be32 |
7081 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
eb69853d | 7082 | union nfsd4_op_u *u) |
e1ca12df | 7083 | { |
eb69853d | 7084 | struct nfsd4_free_stateid *free_stateid = &u->free_stateid; |
e1ca12df | 7085 | stateid_t *stateid = &free_stateid->fr_stateid; |
2da1cec7 | 7086 | struct nfs4_stid *s; |
3bd64a5b | 7087 | struct nfs4_delegation *dp; |
ec59659b | 7088 | struct nfs4_client *cl = cstate->clp; |
2da1cec7 | 7089 | __be32 ret = nfserr_bad_stateid; |
e1ca12df | 7090 | |
1af71cc8 JL |
7091 | spin_lock(&cl->cl_lock); |
7092 | s = find_stateid_locked(cl, stateid); | |
3f29cc82 | 7093 | if (!s || s->sc_status & SC_STATUS_CLOSED) |
1af71cc8 | 7094 | goto out_unlock; |
d688d858 N |
7095 | if (s->sc_status & SC_STATUS_ADMIN_REVOKED) { |
7096 | nfsd4_drop_revoked_stid(s); | |
7097 | ret = nfs_ok; | |
7098 | goto out; | |
7099 | } | |
03da3169 | 7100 | spin_lock(&s->sc_lock); |
2da1cec7 | 7101 | switch (s->sc_type) { |
3f29cc82 N |
7102 | case SC_TYPE_DELEG: |
7103 | if (s->sc_status & SC_STATUS_REVOKED) { | |
7104 | spin_unlock(&s->sc_lock); | |
7105 | dp = delegstateid(s); | |
7106 | list_del_init(&dp->dl_recall_lru); | |
7107 | spin_unlock(&cl->cl_lock); | |
7108 | nfs4_put_stid(s); | |
7109 | ret = nfs_ok; | |
7110 | goto out; | |
7111 | } | |
e1ca12df | 7112 | ret = nfserr_locks_held; |
1af71cc8 | 7113 | break; |
3f29cc82 | 7114 | case SC_TYPE_OPEN: |
2da1cec7 BF |
7115 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); |
7116 | if (ret) | |
1af71cc8 JL |
7117 | break; |
7118 | ret = nfserr_locks_held; | |
f7a4d872 | 7119 | break; |
3f29cc82 | 7120 | case SC_TYPE_LOCK: |
03da3169 | 7121 | spin_unlock(&s->sc_lock); |
a15dfcd5 | 7122 | refcount_inc(&s->sc_count); |
1af71cc8 | 7123 | spin_unlock(&cl->cl_lock); |
42691398 | 7124 | ret = nfsd4_free_lock_stateid(stateid, s); |
1af71cc8 | 7125 | goto out; |
e1ca12df | 7126 | } |
03da3169 | 7127 | spin_unlock(&s->sc_lock); |
1af71cc8 JL |
7128 | out_unlock: |
7129 | spin_unlock(&cl->cl_lock); | |
e1ca12df | 7130 | out: |
e1ca12df BS |
7131 | return ret; |
7132 | } | |
7133 | ||
4c4cd222 N |
7134 | static inline int |
7135 | setlkflg (int type) | |
7136 | { | |
7137 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
7138 | RD_STATE : WR_STATE; | |
7139 | } | |
1da177e4 | 7140 | |
dcef0413 | 7141 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
c0a5d93e BF |
7142 | { |
7143 | struct svc_fh *current_fh = &cstate->current_fh; | |
7144 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
7145 | __be32 status; | |
7146 | ||
c0a5d93e BF |
7147 | status = nfsd4_check_seqid(cstate, sop, seqid); |
7148 | if (status) | |
7149 | return status; | |
9271d7e5 TM |
7150 | status = nfsd4_lock_ol_stateid(stp); |
7151 | if (status != nfs_ok) | |
7152 | return status; | |
f7a4d872 | 7153 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); |
35a92fe8 JL |
7154 | if (status == nfs_ok) |
7155 | status = nfs4_check_fh(current_fh, &stp->st_stid); | |
7156 | if (status != nfs_ok) | |
feb9dad5 | 7157 | mutex_unlock(&stp->st_mutex); |
35a92fe8 | 7158 | return status; |
c0a5d93e BF |
7159 | } |
7160 | ||
ee97e730 JL |
7161 | /** |
7162 | * nfs4_preprocess_seqid_op - find and prep an ol_stateid for a seqid-morphing op | |
7163 | * @cstate: compund state | |
7164 | * @seqid: seqid (provided by client) | |
7165 | * @stateid: stateid (provided by client) | |
7166 | * @typemask: mask of allowable types for this operation | |
3f29cc82 | 7167 | * @statusmask: mask of allowed states: 0 or STID_CLOSED |
ee97e730 JL |
7168 | * @stpp: return pointer for the stateid found |
7169 | * @nn: net namespace for request | |
7170 | * | |
7171 | * Given a stateid+seqid from a client, look up an nfs4_ol_stateid and | |
7172 | * return it in @stpp. On a nfs_ok return, the returned stateid will | |
7173 | * have its st_mutex locked. | |
1da177e4 | 7174 | */ |
b37ad28b | 7175 | static __be32 |
dd453dfd | 7176 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
3f29cc82 N |
7177 | stateid_t *stateid, |
7178 | unsigned short typemask, unsigned short statusmask, | |
3320fef1 SK |
7179 | struct nfs4_ol_stateid **stpp, |
7180 | struct nfsd_net *nn) | |
1da177e4 | 7181 | { |
0836f587 | 7182 | __be32 status; |
38c2f4b1 | 7183 | struct nfs4_stid *s; |
e17f99b7 | 7184 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 7185 | |
dd5e3fbc | 7186 | trace_nfsd_preprocess(seqid, stateid); |
3a4f98bb | 7187 | |
1da177e4 | 7188 | *stpp = NULL; |
3f29cc82 N |
7189 | status = nfsd4_lookup_stateid(cstate, stateid, |
7190 | typemask, statusmask, &s, nn); | |
c0a5d93e BF |
7191 | if (status) |
7192 | return status; | |
e17f99b7 | 7193 | stp = openlockstateid(s); |
58fb12e6 | 7194 | nfsd4_cstate_assign_replay(cstate, stp->st_stateowner); |
1da177e4 | 7195 | |
e17f99b7 | 7196 | status = nfs4_seqid_op_checks(cstate, stateid, seqid, stp); |
fd911011 | 7197 | if (!status) |
e17f99b7 | 7198 | *stpp = stp; |
fd911011 TM |
7199 | else |
7200 | nfs4_put_stid(&stp->st_stid); | |
e17f99b7 | 7201 | return status; |
c0a5d93e | 7202 | } |
39325bd0 | 7203 | |
3320fef1 SK |
7204 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
7205 | stateid_t *stateid, struct nfs4_ol_stateid **stpp, struct nfsd_net *nn) | |
c0a5d93e BF |
7206 | { |
7207 | __be32 status; | |
7208 | struct nfs4_openowner *oo; | |
4cbfc9f7 | 7209 | struct nfs4_ol_stateid *stp; |
1da177e4 | 7210 | |
c0a5d93e | 7211 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
3f29cc82 | 7212 | SC_TYPE_OPEN, 0, &stp, nn); |
7a8711c9 BF |
7213 | if (status) |
7214 | return status; | |
4cbfc9f7 TM |
7215 | oo = openowner(stp->st_stateowner); |
7216 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { | |
feb9dad5 | 7217 | mutex_unlock(&stp->st_mutex); |
4cbfc9f7 | 7218 | nfs4_put_stid(&stp->st_stid); |
3a4f98bb | 7219 | return nfserr_bad_stateid; |
4cbfc9f7 TM |
7220 | } |
7221 | *stpp = stp; | |
3a4f98bb | 7222 | return nfs_ok; |
1da177e4 LT |
7223 | } |
7224 | ||
b37ad28b | 7225 | __be32 |
ca364317 | 7226 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 7227 | union nfsd4_op_u *u) |
1da177e4 | 7228 | { |
eb69853d | 7229 | struct nfsd4_open_confirm *oc = &u->open_confirm; |
b37ad28b | 7230 | __be32 status; |
fe0750e5 | 7231 | struct nfs4_openowner *oo; |
dcef0413 | 7232 | struct nfs4_ol_stateid *stp; |
3320fef1 | 7233 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 7234 | |
a6a9f18f AV |
7235 | dprintk("NFSD: nfsd4_open_confirm on file %pd\n", |
7236 | cstate->current_fh.fh_dentry); | |
1da177e4 | 7237 | |
ca364317 | 7238 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
7239 | if (status) |
7240 | return status; | |
1da177e4 | 7241 | |
9072d5c6 | 7242 | status = nfs4_preprocess_seqid_op(cstate, |
3f29cc82 N |
7243 | oc->oc_seqid, &oc->oc_req_stateid, |
7244 | SC_TYPE_OPEN, 0, &stp, nn); | |
9072d5c6 | 7245 | if (status) |
68b66e82 | 7246 | goto out; |
fe0750e5 | 7247 | oo = openowner(stp->st_stateowner); |
68b66e82 | 7248 | status = nfserr_bad_stateid; |
35a92fe8 | 7249 | if (oo->oo_flags & NFS4_OO_CONFIRMED) { |
feb9dad5 | 7250 | mutex_unlock(&stp->st_mutex); |
2585fc79 | 7251 | goto put_stateid; |
35a92fe8 | 7252 | } |
dad1c067 | 7253 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
9767feb2 | 7254 | nfs4_inc_and_copy_stateid(&oc->oc_resp_stateid, &stp->st_stid); |
feb9dad5 | 7255 | mutex_unlock(&stp->st_mutex); |
dd5e3fbc | 7256 | trace_nfsd_open_confirm(oc->oc_seqid, &stp->st_stid.sc_stateid); |
2a4317c5 | 7257 | nfsd4_client_record_create(oo->oo_owner.so_client); |
68b66e82 | 7258 | status = nfs_ok; |
2585fc79 TM |
7259 | put_stateid: |
7260 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 7261 | out: |
9411b1d4 | 7262 | nfsd4_bump_seqid(cstate, status); |
1da177e4 LT |
7263 | return status; |
7264 | } | |
7265 | ||
6409a5a6 | 7266 | static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) |
1da177e4 | 7267 | { |
82c5ff1b | 7268 | if (!test_access(access, stp)) |
6409a5a6 | 7269 | return; |
11b9164a | 7270 | nfs4_file_put_access(stp->st_stid.sc_file, access); |
82c5ff1b | 7271 | clear_access(access, stp); |
6409a5a6 | 7272 | } |
f197c271 | 7273 | |
6409a5a6 BF |
7274 | static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) |
7275 | { | |
7276 | switch (to_access) { | |
7277 | case NFS4_SHARE_ACCESS_READ: | |
7278 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); | |
7279 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
7280 | break; | |
7281 | case NFS4_SHARE_ACCESS_WRITE: | |
7282 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); | |
7283 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
7284 | break; | |
7285 | case NFS4_SHARE_ACCESS_BOTH: | |
7286 | break; | |
7287 | default: | |
063b0fb9 | 7288 | WARN_ON_ONCE(1); |
1da177e4 LT |
7289 | } |
7290 | } | |
7291 | ||
b37ad28b | 7292 | __be32 |
ca364317 | 7293 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
eb69853d | 7294 | struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) |
1da177e4 | 7295 | { |
eb69853d | 7296 | struct nfsd4_open_downgrade *od = &u->open_downgrade; |
b37ad28b | 7297 | __be32 status; |
dcef0413 | 7298 | struct nfs4_ol_stateid *stp; |
3320fef1 | 7299 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 7300 | |
a6a9f18f AV |
7301 | dprintk("NFSD: nfsd4_open_downgrade on file %pd\n", |
7302 | cstate->current_fh.fh_dentry); | |
1da177e4 | 7303 | |
c30e92df | 7304 | /* We don't yet support WANT bits: */ |
2c8bd7e0 BH |
7305 | if (od->od_deleg_want) |
7306 | dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, | |
7307 | od->od_deleg_want); | |
1da177e4 | 7308 | |
c0a5d93e | 7309 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
3320fef1 | 7310 | &od->od_stateid, &stp, nn); |
9072d5c6 | 7311 | if (status) |
1da177e4 | 7312 | goto out; |
1da177e4 | 7313 | status = nfserr_inval; |
82c5ff1b | 7314 | if (!test_access(od->od_share_access, stp)) { |
c11c591f | 7315 | dprintk("NFSD: access not a subset of current bitmap: 0x%hhx, input access=%08x\n", |
1da177e4 | 7316 | stp->st_access_bmap, od->od_share_access); |
0667b1e9 | 7317 | goto put_stateid; |
1da177e4 | 7318 | } |
ce0fc43c | 7319 | if (!test_deny(od->od_share_deny, stp)) { |
c11c591f | 7320 | dprintk("NFSD: deny not a subset of current bitmap: 0x%hhx, input deny=%08x\n", |
1da177e4 | 7321 | stp->st_deny_bmap, od->od_share_deny); |
0667b1e9 | 7322 | goto put_stateid; |
1da177e4 | 7323 | } |
6409a5a6 | 7324 | nfs4_stateid_downgrade(stp, od->od_share_access); |
ce0fc43c | 7325 | reset_union_bmap_deny(od->od_share_deny, stp); |
9767feb2 | 7326 | nfs4_inc_and_copy_stateid(&od->od_stateid, &stp->st_stid); |
1da177e4 | 7327 | status = nfs_ok; |
0667b1e9 | 7328 | put_stateid: |
feb9dad5 | 7329 | mutex_unlock(&stp->st_mutex); |
0667b1e9 | 7330 | nfs4_put_stid(&stp->st_stid); |
1da177e4 | 7331 | out: |
9411b1d4 | 7332 | nfsd4_bump_seqid(cstate, status); |
1da177e4 LT |
7333 | return status; |
7334 | } | |
7335 | ||
f7a4d872 BF |
7336 | static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) |
7337 | { | |
acf9295b | 7338 | struct nfs4_client *clp = s->st_stid.sc_client; |
e8568739 | 7339 | bool unhashed; |
d83017f9 | 7340 | LIST_HEAD(reaplist); |
019805fe | 7341 | struct nfs4_ol_stateid *stp; |
acf9295b | 7342 | |
2c41beb0 | 7343 | spin_lock(&clp->cl_lock); |
e8568739 | 7344 | unhashed = unhash_open_stateid(s, &reaplist); |
acf9295b | 7345 | |
d83017f9 | 7346 | if (clp->cl_minorversion) { |
e8568739 JL |
7347 | if (unhashed) |
7348 | put_ol_stateid_locked(s, &reaplist); | |
d83017f9 | 7349 | spin_unlock(&clp->cl_lock); |
019805fe DN |
7350 | list_for_each_entry(stp, &reaplist, st_locks) |
7351 | nfs4_free_cpntf_statelist(clp->net, &stp->st_stid); | |
d83017f9 JL |
7352 | free_ol_stateid_reaplist(&reaplist); |
7353 | } else { | |
7354 | spin_unlock(&clp->cl_lock); | |
7355 | free_ol_stateid_reaplist(&reaplist); | |
e8568739 JL |
7356 | if (unhashed) |
7357 | move_to_close_lru(s, clp->net); | |
d83017f9 | 7358 | } |
38c387b5 BF |
7359 | } |
7360 | ||
1da177e4 LT |
7361 | /* |
7362 | * nfs4_unlock_state() called after encode | |
7363 | */ | |
b37ad28b | 7364 | __be32 |
ca364317 | 7365 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 7366 | union nfsd4_op_u *u) |
1da177e4 | 7367 | { |
eb69853d | 7368 | struct nfsd4_close *close = &u->close; |
b37ad28b | 7369 | __be32 status; |
dcef0413 | 7370 | struct nfs4_ol_stateid *stp; |
3320fef1 SK |
7371 | struct net *net = SVC_NET(rqstp); |
7372 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 | 7373 | |
3f29cc82 | 7374 | dprintk("NFSD: nfsd4_close on file %pd\n", |
a6a9f18f | 7375 | cstate->current_fh.fh_dentry); |
1da177e4 | 7376 | |
f7a4d872 | 7377 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
3f29cc82 N |
7378 | &close->cl_stateid, |
7379 | SC_TYPE_OPEN, SC_STATUS_CLOSED, | |
7380 | &stp, nn); | |
9411b1d4 | 7381 | nfsd4_bump_seqid(cstate, status); |
9072d5c6 | 7382 | if (status) |
3f29cc82 | 7383 | goto out; |
15ca08d3 | 7384 | |
3f29cc82 N |
7385 | spin_lock(&stp->st_stid.sc_client->cl_lock); |
7386 | stp->st_stid.sc_status |= SC_STATUS_CLOSED; | |
7387 | spin_unlock(&stp->st_stid.sc_client->cl_lock); | |
bd2decac JL |
7388 | |
7389 | /* | |
7390 | * Technically we don't _really_ have to increment or copy it, since | |
7391 | * it should just be gone after this operation and we clobber the | |
7392 | * copied value below, but we continue to do so here just to ensure | |
7393 | * that racing ops see that there was a state change. | |
7394 | */ | |
9767feb2 | 7395 | nfs4_inc_and_copy_stateid(&close->cl_stateid, &stp->st_stid); |
1da177e4 | 7396 | |
f7a4d872 | 7397 | nfsd4_close_open_stateid(stp); |
15ca08d3 | 7398 | mutex_unlock(&stp->st_mutex); |
8a0b589d | 7399 | |
bd2decac JL |
7400 | /* v4.1+ suggests that we send a special stateid in here, since the |
7401 | * clients should just ignore this anyway. Since this is not useful | |
7402 | * for v4.0 clients either, we set it to the special close_stateid | |
7403 | * universally. | |
7404 | * | |
7405 | * See RFC5661 section 18.2.4, and RFC7530 section 16.2.5 | |
7406 | */ | |
7407 | memcpy(&close->cl_stateid, &close_stateid, sizeof(close->cl_stateid)); | |
fb500a7c | 7408 | |
8a0b589d TM |
7409 | /* put reference from nfs4_preprocess_seqid_op */ |
7410 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 7411 | out: |
1da177e4 LT |
7412 | return status; |
7413 | } | |
7414 | ||
b37ad28b | 7415 | __be32 |
ca364317 | 7416 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 7417 | union nfsd4_op_u *u) |
1da177e4 | 7418 | { |
eb69853d | 7419 | struct nfsd4_delegreturn *dr = &u->delegreturn; |
203a8c8e BF |
7420 | struct nfs4_delegation *dp; |
7421 | stateid_t *stateid = &dr->dr_stateid; | |
38c2f4b1 | 7422 | struct nfs4_stid *s; |
b37ad28b | 7423 | __be32 status; |
3320fef1 | 7424 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 7425 | |
ca364317 | 7426 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e | 7427 | return status; |
1da177e4 | 7428 | |
3f29cc82 | 7429 | status = nfsd4_lookup_stateid(cstate, stateid, SC_TYPE_DELEG, 0, &s, nn); |
38c2f4b1 | 7430 | if (status) |
203a8c8e | 7431 | goto out; |
38c2f4b1 | 7432 | dp = delegstateid(s); |
03da3169 | 7433 | status = nfsd4_stid_check_stateid_generation(stateid, &dp->dl_stid, nfsd4_has_session(cstate)); |
203a8c8e | 7434 | if (status) |
fd911011 | 7435 | goto put_stateid; |
203a8c8e | 7436 | |
20eee313 | 7437 | trace_nfsd_deleg_return(stateid); |
c035362e | 7438 | wake_up_var(d_inode(cstate->current_fh.fh_dentry)); |
3bd64a5b | 7439 | destroy_delegation(dp); |
fd911011 TM |
7440 | put_stateid: |
7441 | nfs4_put_stid(&dp->dl_stid); | |
1da177e4 LT |
7442 | out: |
7443 | return status; | |
7444 | } | |
7445 | ||
87df4de8 BH |
7446 | /* last octet in a range */ |
7447 | static inline u64 | |
7448 | last_byte_offset(u64 start, u64 len) | |
7449 | { | |
7450 | u64 end; | |
7451 | ||
063b0fb9 | 7452 | WARN_ON_ONCE(!len); |
87df4de8 BH |
7453 | end = start + len; |
7454 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
7455 | } | |
7456 | ||
1da177e4 LT |
7457 | /* |
7458 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
7459 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
7460 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
7461 | * locking, this prevents us from being completely protocol-compliant. The | |
7462 | * real solution to this problem is to start using unsigned file offsets in | |
7463 | * the VFS, but this is a very deep change! | |
7464 | */ | |
7465 | static inline void | |
7466 | nfs4_transform_lock_offset(struct file_lock *lock) | |
7467 | { | |
7468 | if (lock->fl_start < 0) | |
7469 | lock->fl_start = OFFSET_MAX; | |
7470 | if (lock->fl_end < 0) | |
7471 | lock->fl_end = OFFSET_MAX; | |
7472 | } | |
7473 | ||
cae80b30 | 7474 | static fl_owner_t |
35aff067 | 7475 | nfsd4_lm_get_owner(fl_owner_t owner) |
aef9583b | 7476 | { |
cae80b30 JL |
7477 | struct nfs4_lockowner *lo = (struct nfs4_lockowner *)owner; |
7478 | ||
7479 | nfs4_get_stateowner(&lo->lo_owner); | |
7480 | return owner; | |
aef9583b KM |
7481 | } |
7482 | ||
cae80b30 | 7483 | static void |
35aff067 | 7484 | nfsd4_lm_put_owner(fl_owner_t owner) |
aef9583b | 7485 | { |
cae80b30 | 7486 | struct nfs4_lockowner *lo = (struct nfs4_lockowner *)owner; |
aef9583b | 7487 | |
cae80b30 | 7488 | if (lo) |
aef9583b | 7489 | nfs4_put_stateowner(&lo->lo_owner); |
aef9583b KM |
7490 | } |
7491 | ||
27431aff DN |
7492 | /* return pointer to struct nfs4_client if client is expirable */ |
7493 | static bool | |
7494 | nfsd4_lm_lock_expirable(struct file_lock *cfl) | |
7495 | { | |
7496 | struct nfs4_lockowner *lo = (struct nfs4_lockowner *)cfl->fl_owner; | |
7497 | struct nfs4_client *clp = lo->lo_owner.so_client; | |
7498 | struct nfsd_net *nn; | |
7499 | ||
7500 | if (try_to_expire_client(clp)) { | |
7501 | nn = net_generic(clp->net, nfsd_net_id); | |
7502 | mod_delayed_work(laundry_wq, &nn->laundromat_work, 0); | |
7503 | return true; | |
7504 | } | |
7505 | return false; | |
7506 | } | |
7507 | ||
7508 | /* schedule laundromat to run immediately and wait for it to complete */ | |
7509 | static void | |
7510 | nfsd4_lm_expire_lock(void) | |
7511 | { | |
7512 | flush_workqueue(laundry_wq); | |
7513 | } | |
7514 | ||
76d348fa JL |
7515 | static void |
7516 | nfsd4_lm_notify(struct file_lock *fl) | |
7517 | { | |
7518 | struct nfs4_lockowner *lo = (struct nfs4_lockowner *)fl->fl_owner; | |
7519 | struct net *net = lo->lo_owner.so_client->net; | |
7520 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
7521 | struct nfsd4_blocked_lock *nbl = container_of(fl, | |
7522 | struct nfsd4_blocked_lock, nbl_lock); | |
7523 | bool queue = false; | |
7524 | ||
7919d0a2 | 7525 | /* An empty list means that something else is going to be using it */ |
0cc11a61 | 7526 | spin_lock(&nn->blocked_locks_lock); |
76d348fa JL |
7527 | if (!list_empty(&nbl->nbl_list)) { |
7528 | list_del_init(&nbl->nbl_list); | |
7919d0a2 | 7529 | list_del_init(&nbl->nbl_lru); |
76d348fa JL |
7530 | queue = true; |
7531 | } | |
0cc11a61 | 7532 | spin_unlock(&nn->blocked_locks_lock); |
76d348fa | 7533 | |
2cde7f81 CL |
7534 | if (queue) { |
7535 | trace_nfsd_cb_notify_lock(lo, nbl); | |
76d348fa | 7536 | nfsd4_run_cb(&nbl->nbl_cb); |
2cde7f81 | 7537 | } |
76d348fa JL |
7538 | } |
7539 | ||
7b021967 | 7540 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
27431aff | 7541 | .lm_mod_owner = THIS_MODULE, |
76d348fa | 7542 | .lm_notify = nfsd4_lm_notify, |
35aff067 CL |
7543 | .lm_get_owner = nfsd4_lm_get_owner, |
7544 | .lm_put_owner = nfsd4_lm_put_owner, | |
27431aff DN |
7545 | .lm_lock_expirable = nfsd4_lm_lock_expirable, |
7546 | .lm_expire_lock = nfsd4_lm_expire_lock, | |
d5b9026a | 7547 | }; |
1da177e4 LT |
7548 | |
7549 | static inline void | |
7550 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
7551 | { | |
fe0750e5 | 7552 | struct nfs4_lockowner *lo; |
1da177e4 | 7553 | |
d5b9026a | 7554 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 | 7555 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
6f4859b8 BF |
7556 | xdr_netobj_dup(&deny->ld_owner, &lo->lo_owner.so_owner, |
7557 | GFP_KERNEL); | |
7c13f344 BF |
7558 | if (!deny->ld_owner.data) |
7559 | /* We just don't care that much */ | |
7560 | goto nevermind; | |
fe0750e5 | 7561 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; |
d5b9026a | 7562 | } else { |
7c13f344 BF |
7563 | nevermind: |
7564 | deny->ld_owner.len = 0; | |
7565 | deny->ld_owner.data = NULL; | |
d5b9026a N |
7566 | deny->ld_clientid.cl_boot = 0; |
7567 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
7568 | } |
7569 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
7570 | deny->ld_length = NFS4_MAX_UINT64; |
7571 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
7572 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
7573 | deny->ld_type = NFS4_READ_LT; | |
7574 | if (fl->fl_type != F_RDLCK) | |
7575 | deny->ld_type = NFS4_WRITE_LT; | |
7576 | } | |
7577 | ||
fe0750e5 | 7578 | static struct nfs4_lockowner * |
c8623999 | 7579 | find_lockowner_str_locked(struct nfs4_client *clp, struct xdr_netobj *owner) |
1da177e4 | 7580 | { |
d4f0489f | 7581 | unsigned int strhashval = ownerstr_hashval(owner); |
b3c32bcd | 7582 | struct nfs4_stateowner *so; |
1da177e4 | 7583 | |
0a880a28 TM |
7584 | lockdep_assert_held(&clp->cl_lock); |
7585 | ||
d4f0489f TM |
7586 | list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[strhashval], |
7587 | so_strhash) { | |
b3c32bcd TM |
7588 | if (so->so_is_open_owner) |
7589 | continue; | |
b5971afa KM |
7590 | if (same_owner_str(so, owner)) |
7591 | return lockowner(nfs4_get_stateowner(so)); | |
1da177e4 LT |
7592 | } |
7593 | return NULL; | |
7594 | } | |
7595 | ||
c58c6610 | 7596 | static struct nfs4_lockowner * |
c8623999 | 7597 | find_lockowner_str(struct nfs4_client *clp, struct xdr_netobj *owner) |
c58c6610 TM |
7598 | { |
7599 | struct nfs4_lockowner *lo; | |
7600 | ||
d4f0489f | 7601 | spin_lock(&clp->cl_lock); |
c8623999 | 7602 | lo = find_lockowner_str_locked(clp, owner); |
d4f0489f | 7603 | spin_unlock(&clp->cl_lock); |
c58c6610 TM |
7604 | return lo; |
7605 | } | |
7606 | ||
8f4b54c5 JL |
7607 | static void nfs4_unhash_lockowner(struct nfs4_stateowner *sop) |
7608 | { | |
c58c6610 | 7609 | unhash_lockowner_locked(lockowner(sop)); |
8f4b54c5 JL |
7610 | } |
7611 | ||
6b180f0b JL |
7612 | static void nfs4_free_lockowner(struct nfs4_stateowner *sop) |
7613 | { | |
7614 | struct nfs4_lockowner *lo = lockowner(sop); | |
7615 | ||
7616 | kmem_cache_free(lockowner_slab, lo); | |
7617 | } | |
7618 | ||
7619 | static const struct nfs4_stateowner_operations lockowner_ops = { | |
8f4b54c5 JL |
7620 | .so_unhash = nfs4_unhash_lockowner, |
7621 | .so_free = nfs4_free_lockowner, | |
6b180f0b JL |
7622 | }; |
7623 | ||
1da177e4 LT |
7624 | /* |
7625 | * Alloc a lock owner structure. | |
7626 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 7627 | * occurred. |
1da177e4 | 7628 | * |
16bfdaaf | 7629 | * strhashval = ownerstr_hashval |
1da177e4 | 7630 | */ |
fe0750e5 | 7631 | static struct nfs4_lockowner * |
c58c6610 TM |
7632 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, |
7633 | struct nfs4_ol_stateid *open_stp, | |
7634 | struct nfsd4_lock *lock) | |
7635 | { | |
c58c6610 | 7636 | struct nfs4_lockowner *lo, *ret; |
1da177e4 | 7637 | |
fe0750e5 BF |
7638 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
7639 | if (!lo) | |
1da177e4 | 7640 | return NULL; |
76d348fa | 7641 | INIT_LIST_HEAD(&lo->lo_blocked); |
fe0750e5 BF |
7642 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
7643 | lo->lo_owner.so_is_open_owner = 0; | |
5db1c03f | 7644 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid; |
6b180f0b | 7645 | lo->lo_owner.so_ops = &lockowner_ops; |
d4f0489f | 7646 | spin_lock(&clp->cl_lock); |
c8623999 | 7647 | ret = find_lockowner_str_locked(clp, &lock->lk_new_owner); |
c58c6610 TM |
7648 | if (ret == NULL) { |
7649 | list_add(&lo->lo_owner.so_strhash, | |
d4f0489f | 7650 | &clp->cl_ownerstr_hashtbl[strhashval]); |
c58c6610 TM |
7651 | ret = lo; |
7652 | } else | |
d50ffded KM |
7653 | nfs4_free_stateowner(&lo->lo_owner); |
7654 | ||
d4f0489f | 7655 | spin_unlock(&clp->cl_lock); |
340f0ba1 | 7656 | return ret; |
1da177e4 LT |
7657 | } |
7658 | ||
fd1fd685 | 7659 | static struct nfs4_ol_stateid * |
a451b123 TM |
7660 | find_lock_stateid(const struct nfs4_lockowner *lo, |
7661 | const struct nfs4_ol_stateid *ost) | |
fd1fd685 TM |
7662 | { |
7663 | struct nfs4_ol_stateid *lst; | |
fd1fd685 | 7664 | |
a451b123 | 7665 | lockdep_assert_held(&ost->st_stid.sc_client->cl_lock); |
fd1fd685 | 7666 | |
a451b123 TM |
7667 | /* If ost is not hashed, ost->st_locks will not be valid */ |
7668 | if (!nfs4_ol_stateid_unhashed(ost)) | |
7669 | list_for_each_entry(lst, &ost->st_locks, st_locks) { | |
7670 | if (lst->st_stateowner == &lo->lo_owner) { | |
7671 | refcount_inc(&lst->st_stid.sc_count); | |
7672 | return lst; | |
7673 | } | |
fd1fd685 | 7674 | } |
fd1fd685 TM |
7675 | return NULL; |
7676 | } | |
7677 | ||
beeca19c | 7678 | static struct nfs4_ol_stateid * |
356a95ec JL |
7679 | init_lock_stateid(struct nfs4_ol_stateid *stp, struct nfs4_lockowner *lo, |
7680 | struct nfs4_file *fp, struct inode *inode, | |
7681 | struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 7682 | { |
d3b313a4 | 7683 | struct nfs4_client *clp = lo->lo_owner.so_client; |
beeca19c | 7684 | struct nfs4_ol_stateid *retstp; |
1da177e4 | 7685 | |
beeca19c | 7686 | mutex_init(&stp->st_mutex); |
4f34bd05 | 7687 | mutex_lock_nested(&stp->st_mutex, OPEN_STATEID_MUTEX); |
beeca19c TM |
7688 | retry: |
7689 | spin_lock(&clp->cl_lock); | |
a451b123 TM |
7690 | if (nfs4_ol_stateid_unhashed(open_stp)) |
7691 | goto out_close; | |
7692 | retstp = find_lock_stateid(lo, open_stp); | |
beeca19c | 7693 | if (retstp) |
a451b123 | 7694 | goto out_found; |
a15dfcd5 | 7695 | refcount_inc(&stp->st_stid.sc_count); |
3f29cc82 | 7696 | stp->st_stid.sc_type = SC_TYPE_LOCK; |
b5971afa | 7697 | stp->st_stateowner = nfs4_get_stateowner(&lo->lo_owner); |
13cd2184 | 7698 | get_nfs4_file(fp); |
11b9164a | 7699 | stp->st_stid.sc_file = fp; |
0997b173 | 7700 | stp->st_access_bmap = 0; |
1da177e4 | 7701 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 7702 | stp->st_openstp = open_stp; |
a451b123 | 7703 | spin_lock(&fp->fi_lock); |
3c87b9b7 | 7704 | list_add(&stp->st_locks, &open_stp->st_locks); |
1c755dc1 | 7705 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
1d31a253 TM |
7706 | list_add(&stp->st_perfile, &fp->fi_stateids); |
7707 | spin_unlock(&fp->fi_lock); | |
beeca19c | 7708 | spin_unlock(&clp->cl_lock); |
beeca19c | 7709 | return stp; |
a451b123 TM |
7710 | out_found: |
7711 | spin_unlock(&clp->cl_lock); | |
7712 | if (nfsd4_lock_ol_stateid(retstp) != nfs_ok) { | |
7713 | nfs4_put_stid(&retstp->st_stid); | |
7714 | goto retry; | |
7715 | } | |
7716 | /* To keep mutex tracking happy */ | |
7717 | mutex_unlock(&stp->st_mutex); | |
7718 | return retstp; | |
7719 | out_close: | |
7720 | spin_unlock(&clp->cl_lock); | |
7721 | mutex_unlock(&stp->st_mutex); | |
7722 | return NULL; | |
1da177e4 LT |
7723 | } |
7724 | ||
356a95ec JL |
7725 | static struct nfs4_ol_stateid * |
7726 | find_or_create_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fi, | |
7727 | struct inode *inode, struct nfs4_ol_stateid *ost, | |
7728 | bool *new) | |
7729 | { | |
7730 | struct nfs4_stid *ns = NULL; | |
7731 | struct nfs4_ol_stateid *lst; | |
7732 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); | |
7733 | struct nfs4_client *clp = oo->oo_owner.so_client; | |
7734 | ||
beeca19c | 7735 | *new = false; |
356a95ec | 7736 | spin_lock(&clp->cl_lock); |
a451b123 | 7737 | lst = find_lock_stateid(lo, ost); |
356a95ec | 7738 | spin_unlock(&clp->cl_lock); |
beeca19c TM |
7739 | if (lst != NULL) { |
7740 | if (nfsd4_lock_ol_stateid(lst) == nfs_ok) | |
7741 | goto out; | |
7742 | nfs4_put_stid(&lst->st_stid); | |
7743 | } | |
7744 | ns = nfs4_alloc_stid(clp, stateid_slab, nfs4_free_lock_stateid); | |
7745 | if (ns == NULL) | |
7746 | return NULL; | |
7747 | ||
7748 | lst = init_lock_stateid(openlockstateid(ns), lo, fi, inode, ost); | |
7749 | if (lst == openlockstateid(ns)) | |
7750 | *new = true; | |
7751 | else | |
356a95ec | 7752 | nfs4_put_stid(ns); |
beeca19c | 7753 | out: |
356a95ec JL |
7754 | return lst; |
7755 | } | |
c53530da | 7756 | |
fd39ca9a | 7757 | static int |
1da177e4 LT |
7758 | check_lock_length(u64 offset, u64 length) |
7759 | { | |
e7969315 KM |
7760 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
7761 | (length > ~offset))); | |
1da177e4 LT |
7762 | } |
7763 | ||
dcef0413 | 7764 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 | 7765 | { |
11b9164a | 7766 | struct nfs4_file *fp = lock_stp->st_stid.sc_file; |
0997b173 | 7767 | |
7214e860 JL |
7768 | lockdep_assert_held(&fp->fi_lock); |
7769 | ||
82c5ff1b | 7770 | if (test_access(access, lock_stp)) |
0997b173 | 7771 | return; |
12659651 | 7772 | __nfs4_file_get_access(fp, access); |
82c5ff1b | 7773 | set_access(access, lock_stp); |
0997b173 BF |
7774 | } |
7775 | ||
356a95ec JL |
7776 | static __be32 |
7777 | lookup_or_create_lock_state(struct nfsd4_compound_state *cstate, | |
7778 | struct nfs4_ol_stateid *ost, | |
7779 | struct nfsd4_lock *lock, | |
dd257933 | 7780 | struct nfs4_ol_stateid **plst, bool *new) |
64a284d0 | 7781 | { |
5db1c03f | 7782 | __be32 status; |
11b9164a | 7783 | struct nfs4_file *fi = ost->st_stid.sc_file; |
64a284d0 BF |
7784 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); |
7785 | struct nfs4_client *cl = oo->oo_owner.so_client; | |
2b0143b5 | 7786 | struct inode *inode = d_inode(cstate->current_fh.fh_dentry); |
64a284d0 | 7787 | struct nfs4_lockowner *lo; |
dd257933 | 7788 | struct nfs4_ol_stateid *lst; |
64a284d0 BF |
7789 | unsigned int strhashval; |
7790 | ||
c8623999 | 7791 | lo = find_lockowner_str(cl, &lock->lk_new_owner); |
c53530da | 7792 | if (!lo) { |
76f6c9e1 | 7793 | strhashval = ownerstr_hashval(&lock->lk_new_owner); |
c53530da JL |
7794 | lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); |
7795 | if (lo == NULL) | |
7796 | return nfserr_jukebox; | |
7797 | } else { | |
7798 | /* with an existing lockowner, seqids must be the same */ | |
5db1c03f | 7799 | status = nfserr_bad_seqid; |
c53530da JL |
7800 | if (!cstate->minorversion && |
7801 | lock->lk_new_lock_seqid != lo->lo_owner.so_seqid) | |
5db1c03f | 7802 | goto out; |
64a284d0 | 7803 | } |
c53530da | 7804 | |
dd257933 JL |
7805 | lst = find_or_create_lock_stateid(lo, fi, inode, ost, new); |
7806 | if (lst == NULL) { | |
5db1c03f JL |
7807 | status = nfserr_jukebox; |
7808 | goto out; | |
64a284d0 | 7809 | } |
dd257933 | 7810 | |
5db1c03f | 7811 | status = nfs_ok; |
dd257933 | 7812 | *plst = lst; |
5db1c03f JL |
7813 | out: |
7814 | nfs4_put_stateowner(&lo->lo_owner); | |
7815 | return status; | |
64a284d0 BF |
7816 | } |
7817 | ||
1da177e4 LT |
7818 | /* |
7819 | * LOCK operation | |
7820 | */ | |
b37ad28b | 7821 | __be32 |
ca364317 | 7822 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 7823 | union nfsd4_op_u *u) |
1da177e4 | 7824 | { |
eb69853d | 7825 | struct nfsd4_lock *lock = &u->lock; |
fe0750e5 BF |
7826 | struct nfs4_openowner *open_sop = NULL; |
7827 | struct nfs4_lockowner *lock_sop = NULL; | |
3d0fabd5 | 7828 | struct nfs4_ol_stateid *lock_stp = NULL; |
0667b1e9 | 7829 | struct nfs4_ol_stateid *open_stp = NULL; |
7214e860 | 7830 | struct nfs4_file *fp; |
eb82dd39 | 7831 | struct nfsd_file *nf = NULL; |
76d348fa | 7832 | struct nfsd4_blocked_lock *nbl = NULL; |
21179d81 JL |
7833 | struct file_lock *file_lock = NULL; |
7834 | struct file_lock *conflock = NULL; | |
2dd10de8 | 7835 | struct super_block *sb; |
b37ad28b | 7836 | __be32 status = 0; |
b34f27aa | 7837 | int lkflg; |
b8dd7b9a | 7838 | int err; |
5db1c03f | 7839 | bool new = false; |
76d348fa JL |
7840 | unsigned char fl_type; |
7841 | unsigned int fl_flags = FL_POSIX; | |
3320fef1 SK |
7842 | struct net *net = SVC_NET(rqstp); |
7843 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 LT |
7844 | |
7845 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
7846 | (long long) lock->lk_offset, | |
7847 | (long long) lock->lk_length); | |
7848 | ||
1da177e4 LT |
7849 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
7850 | return nfserr_inval; | |
7851 | ||
ca364317 | 7852 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 7853 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
7854 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
7855 | return status; | |
7856 | } | |
2dd10de8 | 7857 | sb = cstate->current_fh.fh_dentry->d_sb; |
a6f6ef2f | 7858 | |
1da177e4 | 7859 | if (lock->lk_is_new) { |
684e5638 BF |
7860 | if (nfsd4_has_session(cstate)) |
7861 | /* See rfc 5661 18.10.3: given clientid is ignored: */ | |
76f6c9e1 | 7862 | memcpy(&lock->lk_new_clientid, |
ec59659b | 7863 | &cstate->clp->cl_clientid, |
684e5638 BF |
7864 | sizeof(clientid_t)); |
7865 | ||
1da177e4 | 7866 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 7867 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
7868 | lock->lk_new_open_seqid, |
7869 | &lock->lk_new_open_stateid, | |
3320fef1 | 7870 | &open_stp, nn); |
37515177 | 7871 | if (status) |
1da177e4 | 7872 | goto out; |
feb9dad5 | 7873 | mutex_unlock(&open_stp->st_mutex); |
fe0750e5 | 7874 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 7875 | status = nfserr_bad_stateid; |
684e5638 | 7876 | if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
76f6c9e1 | 7877 | &lock->lk_new_clientid)) |
b34f27aa | 7878 | goto out; |
64a284d0 | 7879 | status = lookup_or_create_lock_state(cstate, open_stp, lock, |
5db1c03f | 7880 | &lock_stp, &new); |
3d0fabd5 | 7881 | } else { |
dd453dfd | 7882 | status = nfs4_preprocess_seqid_op(cstate, |
3f29cc82 N |
7883 | lock->lk_old_lock_seqid, |
7884 | &lock->lk_old_lock_stateid, | |
7885 | SC_TYPE_LOCK, 0, &lock_stp, | |
7886 | nn); | |
3d0fabd5 | 7887 | } |
e1aaa891 BF |
7888 | if (status) |
7889 | goto out; | |
64a284d0 | 7890 | lock_sop = lockowner(lock_stp->st_stateowner); |
1da177e4 | 7891 | |
b34f27aa BF |
7892 | lkflg = setlkflg(lock->lk_type); |
7893 | status = nfs4_check_openmode(lock_stp, lkflg); | |
7894 | if (status) | |
7895 | goto out; | |
7896 | ||
0dd395dc | 7897 | status = nfserr_grace; |
3320fef1 | 7898 | if (locks_in_grace(net) && !lock->lk_reclaim) |
0dd395dc N |
7899 | goto out; |
7900 | status = nfserr_no_grace; | |
3320fef1 | 7901 | if (!locks_in_grace(net) && lock->lk_reclaim) |
0dd395dc N |
7902 | goto out; |
7903 | ||
bb0a55bb BF |
7904 | if (lock->lk_reclaim) |
7905 | fl_flags |= FL_RECLAIM; | |
7906 | ||
11b9164a | 7907 | fp = lock_stp->st_stid.sc_file; |
1da177e4 | 7908 | switch (lock->lk_type) { |
1da177e4 | 7909 | case NFS4_READW_LT: |
2dd10de8 AA |
7910 | if (nfsd4_has_session(cstate) || |
7911 | exportfs_lock_op_is_async(sb->s_export_op)) | |
76d348fa | 7912 | fl_flags |= FL_SLEEP; |
df561f66 | 7913 | fallthrough; |
76d348fa | 7914 | case NFS4_READ_LT: |
7214e860 | 7915 | spin_lock(&fp->fi_lock); |
eb82dd39 JL |
7916 | nf = find_readable_file_locked(fp); |
7917 | if (nf) | |
0997b173 | 7918 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); |
7214e860 | 7919 | spin_unlock(&fp->fi_lock); |
76d348fa | 7920 | fl_type = F_RDLCK; |
529d7b2a | 7921 | break; |
1da177e4 | 7922 | case NFS4_WRITEW_LT: |
2dd10de8 AA |
7923 | if (nfsd4_has_session(cstate) || |
7924 | exportfs_lock_op_is_async(sb->s_export_op)) | |
76d348fa | 7925 | fl_flags |= FL_SLEEP; |
df561f66 | 7926 | fallthrough; |
76d348fa | 7927 | case NFS4_WRITE_LT: |
7214e860 | 7928 | spin_lock(&fp->fi_lock); |
eb82dd39 JL |
7929 | nf = find_writeable_file_locked(fp); |
7930 | if (nf) | |
0997b173 | 7931 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); |
7214e860 | 7932 | spin_unlock(&fp->fi_lock); |
76d348fa | 7933 | fl_type = F_WRLCK; |
529d7b2a | 7934 | break; |
1da177e4 LT |
7935 | default: |
7936 | status = nfserr_inval; | |
7937 | goto out; | |
7938 | } | |
76d348fa | 7939 | |
eb82dd39 | 7940 | if (!nf) { |
f9d7562f BF |
7941 | status = nfserr_openmode; |
7942 | goto out; | |
7943 | } | |
aef9583b | 7944 | |
40595cdc BF |
7945 | /* |
7946 | * Most filesystems with their own ->lock operations will block | |
7947 | * the nfsd thread waiting to acquire the lock. That leads to | |
7948 | * deadlocks (we don't want every nfsd thread tied up waiting | |
7949 | * for file locks), so don't attempt blocking lock notifications | |
7950 | * on those filesystems: | |
7951 | */ | |
2dd10de8 | 7952 | if (!exportfs_lock_op_is_async(sb->s_export_op)) |
40595cdc BF |
7953 | fl_flags &= ~FL_SLEEP; |
7954 | ||
76d348fa JL |
7955 | nbl = find_or_allocate_block(lock_sop, &fp->fi_fhandle, nn); |
7956 | if (!nbl) { | |
7957 | dprintk("NFSD: %s: unable to allocate block!\n", __func__); | |
7958 | status = nfserr_jukebox; | |
7959 | goto out; | |
7960 | } | |
7961 | ||
7962 | file_lock = &nbl->nbl_lock; | |
7963 | file_lock->fl_type = fl_type; | |
aef9583b | 7964 | file_lock->fl_owner = (fl_owner_t)lockowner(nfs4_get_stateowner(&lock_sop->lo_owner)); |
21179d81 | 7965 | file_lock->fl_pid = current->tgid; |
eb82dd39 | 7966 | file_lock->fl_file = nf->nf_file; |
76d348fa | 7967 | file_lock->fl_flags = fl_flags; |
21179d81 JL |
7968 | file_lock->fl_lmops = &nfsd_posix_mng_ops; |
7969 | file_lock->fl_start = lock->lk_offset; | |
7970 | file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); | |
7971 | nfs4_transform_lock_offset(file_lock); | |
7972 | ||
7973 | conflock = locks_alloc_lock(); | |
7974 | if (!conflock) { | |
7975 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
7976 | status = nfserr_jukebox; | |
7977 | goto out; | |
7978 | } | |
1da177e4 | 7979 | |
76d348fa | 7980 | if (fl_flags & FL_SLEEP) { |
20b7d86f | 7981 | nbl->nbl_time = ktime_get_boottime_seconds(); |
0cc11a61 | 7982 | spin_lock(&nn->blocked_locks_lock); |
76d348fa | 7983 | list_add_tail(&nbl->nbl_list, &lock_sop->lo_blocked); |
7919d0a2 | 7984 | list_add_tail(&nbl->nbl_lru, &nn->blocked_locks_lru); |
47446d74 | 7985 | kref_get(&nbl->nbl_kref); |
0cc11a61 | 7986 | spin_unlock(&nn->blocked_locks_lock); |
76d348fa JL |
7987 | } |
7988 | ||
eb82dd39 | 7989 | err = vfs_lock_file(nf->nf_file, F_SETLK, file_lock, conflock); |
76d348fa | 7990 | switch (err) { |
1da177e4 | 7991 | case 0: /* success! */ |
9767feb2 | 7992 | nfs4_inc_and_copy_stateid(&lock->lk_resp_stateid, &lock_stp->st_stid); |
b8dd7b9a | 7993 | status = 0; |
03f318ca BF |
7994 | if (lock->lk_reclaim) |
7995 | nn->somebody_reclaimed = true; | |
eb76b3fd | 7996 | break; |
76d348fa | 7997 | case FILE_LOCK_DEFERRED: |
47446d74 | 7998 | kref_put(&nbl->nbl_kref, free_nbl); |
76d348fa | 7999 | nbl = NULL; |
df561f66 | 8000 | fallthrough; |
76d348fa | 8001 | case -EAGAIN: /* conflock holds conflicting lock */ |
eb76b3fd AA |
8002 | status = nfserr_denied; |
8003 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
21179d81 | 8004 | nfs4_set_lock_denied(conflock, &lock->lk_denied); |
eb76b3fd | 8005 | break; |
76d348fa | 8006 | case -EDEADLK: |
1da177e4 | 8007 | status = nfserr_deadlock; |
eb76b3fd | 8008 | break; |
3e772463 | 8009 | default: |
fd85b817 | 8010 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 8011 | status = nfserrno(err); |
eb76b3fd | 8012 | break; |
1da177e4 | 8013 | } |
1da177e4 | 8014 | out: |
76d348fa JL |
8015 | if (nbl) { |
8016 | /* dequeue it if we queued it before */ | |
8017 | if (fl_flags & FL_SLEEP) { | |
0cc11a61 | 8018 | spin_lock(&nn->blocked_locks_lock); |
47446d74 VA |
8019 | if (!list_empty(&nbl->nbl_list) && |
8020 | !list_empty(&nbl->nbl_lru)) { | |
8021 | list_del_init(&nbl->nbl_list); | |
8022 | list_del_init(&nbl->nbl_lru); | |
8023 | kref_put(&nbl->nbl_kref, free_nbl); | |
8024 | } | |
8025 | /* nbl can use one of lists to be linked to reaplist */ | |
0cc11a61 | 8026 | spin_unlock(&nn->blocked_locks_lock); |
76d348fa JL |
8027 | } |
8028 | free_blocked_lock(nbl); | |
8029 | } | |
eb82dd39 JL |
8030 | if (nf) |
8031 | nfsd_file_put(nf); | |
5db1c03f JL |
8032 | if (lock_stp) { |
8033 | /* Bump seqid manually if the 4.0 replay owner is openowner */ | |
8034 | if (cstate->replay_owner && | |
8035 | cstate->replay_owner != &lock_sop->lo_owner && | |
8036 | seqid_mutating_err(ntohl(status))) | |
8037 | lock_sop->lo_owner.so_seqid++; | |
8038 | ||
8039 | /* | |
8040 | * If this is a new, never-before-used stateid, and we are | |
8041 | * returning an error, then just go ahead and release it. | |
8042 | */ | |
25020720 | 8043 | if (status && new) |
5db1c03f | 8044 | release_lock_stateid(lock_stp); |
beeca19c TM |
8045 | |
8046 | mutex_unlock(&lock_stp->st_mutex); | |
5db1c03f | 8047 | |
3d0fabd5 | 8048 | nfs4_put_stid(&lock_stp->st_stid); |
5db1c03f | 8049 | } |
0667b1e9 TM |
8050 | if (open_stp) |
8051 | nfs4_put_stid(&open_stp->st_stid); | |
9411b1d4 | 8052 | nfsd4_bump_seqid(cstate, status); |
21179d81 JL |
8053 | if (conflock) |
8054 | locks_free_lock(conflock); | |
1da177e4 LT |
8055 | return status; |
8056 | } | |
8057 | ||
92d82e99 CL |
8058 | void nfsd4_lock_release(union nfsd4_op_u *u) |
8059 | { | |
8060 | struct nfsd4_lock *lock = &u->lock; | |
8061 | struct nfsd4_lock_denied *deny = &lock->lk_denied; | |
8062 | ||
8063 | kfree(deny->ld_owner.data); | |
8064 | } | |
8065 | ||
55ef1274 BF |
8066 | /* |
8067 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
8068 | * so we do a temporary open here just to get an open file to pass to | |
0bcc7ca4 | 8069 | * vfs_test_lock. |
55ef1274 | 8070 | */ |
04da6e9d | 8071 | static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) |
55ef1274 | 8072 | { |
6b556ca2 | 8073 | struct nfsd_file *nf; |
bb4d53d6 | 8074 | struct inode *inode; |
217fd6f6 BF |
8075 | __be32 err; |
8076 | ||
8077 | err = nfsd_file_acquire(rqstp, fhp, NFSD_MAY_READ, &nf); | |
8078 | if (err) | |
8079 | return err; | |
bb4d53d6 N |
8080 | inode = fhp->fh_dentry->d_inode; |
8081 | inode_lock(inode); /* to block new leases till after test_lock: */ | |
8082 | err = nfserrno(nfsd_open_break_lease(inode, NFSD_MAY_READ)); | |
217fd6f6 BF |
8083 | if (err) |
8084 | goto out; | |
0bcc7ca4 | 8085 | lock->fl_file = nf->nf_file; |
217fd6f6 | 8086 | err = nfserrno(vfs_test_lock(nf->nf_file, lock)); |
0bcc7ca4 | 8087 | lock->fl_file = NULL; |
217fd6f6 | 8088 | out: |
bb4d53d6 | 8089 | inode_unlock(inode); |
217fd6f6 | 8090 | nfsd_file_put(nf); |
55ef1274 BF |
8091 | return err; |
8092 | } | |
8093 | ||
1da177e4 LT |
8094 | /* |
8095 | * LOCKT operation | |
8096 | */ | |
b37ad28b | 8097 | __be32 |
ca364317 | 8098 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 8099 | union nfsd4_op_u *u) |
1da177e4 | 8100 | { |
eb69853d | 8101 | struct nfsd4_lockt *lockt = &u->lockt; |
21179d81 | 8102 | struct file_lock *file_lock = NULL; |
5db1c03f | 8103 | struct nfs4_lockowner *lo = NULL; |
b37ad28b | 8104 | __be32 status; |
7f2210fa | 8105 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 8106 | |
5ccb0066 | 8107 | if (locks_in_grace(SVC_NET(rqstp))) |
1da177e4 LT |
8108 | return nfserr_grace; |
8109 | ||
8110 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
8111 | return nfserr_inval; | |
8112 | ||
9b2ef62b | 8113 | if (!nfsd4_has_session(cstate)) { |
f71475ba | 8114 | status = set_client(&lockt->lt_clientid, cstate, nn); |
9b2ef62b BF |
8115 | if (status) |
8116 | goto out; | |
8117 | } | |
1da177e4 | 8118 | |
75c096f7 | 8119 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 8120 | goto out; |
1da177e4 | 8121 | |
21179d81 JL |
8122 | file_lock = locks_alloc_lock(); |
8123 | if (!file_lock) { | |
8124 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
8125 | status = nfserr_jukebox; | |
8126 | goto out; | |
8127 | } | |
6cd90662 | 8128 | |
1da177e4 LT |
8129 | switch (lockt->lt_type) { |
8130 | case NFS4_READ_LT: | |
8131 | case NFS4_READW_LT: | |
21179d81 | 8132 | file_lock->fl_type = F_RDLCK; |
f50c9d79 | 8133 | break; |
1da177e4 LT |
8134 | case NFS4_WRITE_LT: |
8135 | case NFS4_WRITEW_LT: | |
21179d81 | 8136 | file_lock->fl_type = F_WRLCK; |
f50c9d79 | 8137 | break; |
1da177e4 | 8138 | default: |
2fdada03 | 8139 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 | 8140 | status = nfserr_inval; |
f50c9d79 | 8141 | goto out; |
1da177e4 LT |
8142 | } |
8143 | ||
c8623999 | 8144 | lo = find_lockowner_str(cstate->clp, &lockt->lt_owner); |
fe0750e5 | 8145 | if (lo) |
21179d81 JL |
8146 | file_lock->fl_owner = (fl_owner_t)lo; |
8147 | file_lock->fl_pid = current->tgid; | |
8148 | file_lock->fl_flags = FL_POSIX; | |
1da177e4 | 8149 | |
21179d81 JL |
8150 | file_lock->fl_start = lockt->lt_offset; |
8151 | file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); | |
1da177e4 | 8152 | |
21179d81 | 8153 | nfs4_transform_lock_offset(file_lock); |
1da177e4 | 8154 | |
21179d81 | 8155 | status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock); |
04da6e9d | 8156 | if (status) |
fd85b817 | 8157 | goto out; |
04da6e9d | 8158 | |
21179d81 | 8159 | if (file_lock->fl_type != F_UNLCK) { |
1da177e4 | 8160 | status = nfserr_denied; |
21179d81 | 8161 | nfs4_set_lock_denied(file_lock, &lockt->lt_denied); |
1da177e4 LT |
8162 | } |
8163 | out: | |
5db1c03f JL |
8164 | if (lo) |
8165 | nfs4_put_stateowner(&lo->lo_owner); | |
21179d81 JL |
8166 | if (file_lock) |
8167 | locks_free_lock(file_lock); | |
1da177e4 LT |
8168 | return status; |
8169 | } | |
8170 | ||
92d82e99 CL |
8171 | void nfsd4_lockt_release(union nfsd4_op_u *u) |
8172 | { | |
8173 | struct nfsd4_lockt *lockt = &u->lockt; | |
8174 | struct nfsd4_lock_denied *deny = &lockt->lt_denied; | |
8175 | ||
8176 | kfree(deny->ld_owner.data); | |
8177 | } | |
8178 | ||
b37ad28b | 8179 | __be32 |
ca364317 | 8180 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 8181 | union nfsd4_op_u *u) |
1da177e4 | 8182 | { |
eb69853d | 8183 | struct nfsd4_locku *locku = &u->locku; |
dcef0413 | 8184 | struct nfs4_ol_stateid *stp; |
eb82dd39 | 8185 | struct nfsd_file *nf = NULL; |
21179d81 | 8186 | struct file_lock *file_lock = NULL; |
b37ad28b | 8187 | __be32 status; |
b8dd7b9a | 8188 | int err; |
3320fef1 SK |
8189 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
8190 | ||
1da177e4 LT |
8191 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", |
8192 | (long long) locku->lu_offset, | |
8193 | (long long) locku->lu_length); | |
8194 | ||
8195 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
8196 | return nfserr_inval; | |
8197 | ||
9072d5c6 | 8198 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
3f29cc82 N |
8199 | &locku->lu_stateid, SC_TYPE_LOCK, 0, |
8200 | &stp, nn); | |
9072d5c6 | 8201 | if (status) |
1da177e4 | 8202 | goto out; |
eb82dd39 JL |
8203 | nf = find_any_file(stp->st_stid.sc_file); |
8204 | if (!nf) { | |
f9d7562f | 8205 | status = nfserr_lock_range; |
858cc573 | 8206 | goto put_stateid; |
f9d7562f | 8207 | } |
21179d81 JL |
8208 | file_lock = locks_alloc_lock(); |
8209 | if (!file_lock) { | |
8210 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
8211 | status = nfserr_jukebox; | |
eb82dd39 | 8212 | goto put_file; |
21179d81 | 8213 | } |
6cd90662 | 8214 | |
21179d81 | 8215 | file_lock->fl_type = F_UNLCK; |
aef9583b | 8216 | file_lock->fl_owner = (fl_owner_t)lockowner(nfs4_get_stateowner(stp->st_stateowner)); |
21179d81 | 8217 | file_lock->fl_pid = current->tgid; |
eb82dd39 | 8218 | file_lock->fl_file = nf->nf_file; |
21179d81 JL |
8219 | file_lock->fl_flags = FL_POSIX; |
8220 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
8221 | file_lock->fl_start = locku->lu_offset; | |
8222 | ||
8223 | file_lock->fl_end = last_byte_offset(locku->lu_offset, | |
8224 | locku->lu_length); | |
8225 | nfs4_transform_lock_offset(file_lock); | |
1da177e4 | 8226 | |
eb82dd39 | 8227 | err = vfs_lock_file(nf->nf_file, F_SETLK, file_lock, NULL); |
b8dd7b9a | 8228 | if (err) { |
fd85b817 | 8229 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
8230 | goto out_nfserr; |
8231 | } | |
9767feb2 | 8232 | nfs4_inc_and_copy_stateid(&locku->lu_stateid, &stp->st_stid); |
eb82dd39 JL |
8233 | put_file: |
8234 | nfsd_file_put(nf); | |
858cc573 | 8235 | put_stateid: |
feb9dad5 | 8236 | mutex_unlock(&stp->st_mutex); |
858cc573 | 8237 | nfs4_put_stid(&stp->st_stid); |
1da177e4 | 8238 | out: |
9411b1d4 | 8239 | nfsd4_bump_seqid(cstate, status); |
21179d81 JL |
8240 | if (file_lock) |
8241 | locks_free_lock(file_lock); | |
1da177e4 LT |
8242 | return status; |
8243 | ||
8244 | out_nfserr: | |
b8dd7b9a | 8245 | status = nfserrno(err); |
eb82dd39 | 8246 | goto put_file; |
1da177e4 LT |
8247 | } |
8248 | ||
8249 | /* | |
8250 | * returns | |
f9c00c3a JL |
8251 | * true: locks held by lockowner |
8252 | * false: no locks held by lockowner | |
1da177e4 | 8253 | */ |
f9c00c3a JL |
8254 | static bool |
8255 | check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner) | |
1da177e4 | 8256 | { |
bd61e0a9 | 8257 | struct file_lock *fl; |
f9c00c3a | 8258 | int status = false; |
edcf9725 | 8259 | struct nfsd_file *nf; |
f9c00c3a | 8260 | struct inode *inode; |
bd61e0a9 | 8261 | struct file_lock_context *flctx; |
f9c00c3a | 8262 | |
edcf9725 N |
8263 | spin_lock(&fp->fi_lock); |
8264 | nf = find_any_file_locked(fp); | |
eb82dd39 | 8265 | if (!nf) { |
f9c00c3a JL |
8266 | /* Any valid lock stateid should have some sort of access */ |
8267 | WARN_ON_ONCE(1); | |
edcf9725 | 8268 | goto out; |
f9c00c3a JL |
8269 | } |
8270 | ||
c65454a9 | 8271 | inode = file_inode(nf->nf_file); |
77c67530 | 8272 | flctx = locks_inode_context(inode); |
bd61e0a9 JL |
8273 | |
8274 | if (flctx && !list_empty_careful(&flctx->flc_posix)) { | |
6109c850 | 8275 | spin_lock(&flctx->flc_lock); |
bd61e0a9 JL |
8276 | list_for_each_entry(fl, &flctx->flc_posix, fl_list) { |
8277 | if (fl->fl_owner == (fl_owner_t)lowner) { | |
8278 | status = true; | |
8279 | break; | |
8280 | } | |
796dadfd | 8281 | } |
6109c850 | 8282 | spin_unlock(&flctx->flc_lock); |
1da177e4 | 8283 | } |
edcf9725 N |
8284 | out: |
8285 | spin_unlock(&fp->fi_lock); | |
1da177e4 LT |
8286 | return status; |
8287 | } | |
8288 | ||
043862b0 CL |
8289 | /** |
8290 | * nfsd4_release_lockowner - process NFSv4.0 RELEASE_LOCKOWNER operations | |
8291 | * @rqstp: RPC transaction | |
8292 | * @cstate: NFSv4 COMPOUND state | |
8293 | * @u: RELEASE_LOCKOWNER arguments | |
8294 | * | |
edcf9725 N |
8295 | * Check if theree are any locks still held and if not - free the lockowner |
8296 | * and any lock state that is owned. | |
043862b0 CL |
8297 | * |
8298 | * Return values: | |
8299 | * %nfs_ok: lockowner released or not found | |
8300 | * %nfserr_locks_held: lockowner still in use | |
8301 | * %nfserr_stale_clientid: clientid no longer active | |
8302 | * %nfserr_expired: clientid not recognized | |
8303 | */ | |
b37ad28b | 8304 | __be32 |
b591480b BF |
8305 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
8306 | struct nfsd4_compound_state *cstate, | |
eb69853d | 8307 | union nfsd4_op_u *u) |
1da177e4 | 8308 | { |
eb69853d | 8309 | struct nfsd4_release_lockowner *rlockowner = &u->release_lockowner; |
bd8fdb6e | 8310 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 8311 | clientid_t *clid = &rlockowner->rl_clientid; |
dcef0413 | 8312 | struct nfs4_ol_stateid *stp; |
bd8fdb6e | 8313 | struct nfs4_lockowner *lo; |
c58c6610 | 8314 | struct nfs4_client *clp; |
bd8fdb6e CL |
8315 | LIST_HEAD(reaplist); |
8316 | __be32 status; | |
1da177e4 LT |
8317 | |
8318 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
8319 | clid->cl_boot, clid->cl_id); | |
8320 | ||
f71475ba | 8321 | status = set_client(clid, cstate, nn); |
9b2ef62b | 8322 | if (status) |
51f5e783 | 8323 | return status; |
d4f0489f | 8324 | clp = cstate->clp; |
fd44907c | 8325 | |
bd8fdb6e CL |
8326 | spin_lock(&clp->cl_lock); |
8327 | lo = find_lockowner_str_locked(clp, &rlockowner->rl_owner); | |
88584818 CL |
8328 | if (!lo) { |
8329 | spin_unlock(&clp->cl_lock); | |
043862b0 | 8330 | return nfs_ok; |
88584818 | 8331 | } |
edcf9725 N |
8332 | |
8333 | list_for_each_entry(stp, &lo->lo_owner.so_stateids, st_perstateowner) { | |
8334 | if (check_for_locks(stp->st_stid.sc_file, lo)) { | |
8335 | spin_unlock(&clp->cl_lock); | |
8336 | nfs4_put_stateowner(&lo->lo_owner); | |
8337 | return nfserr_locks_held; | |
8338 | } | |
bd8fdb6e | 8339 | } |
88584818 CL |
8340 | unhash_lockowner_locked(lo); |
8341 | while (!list_empty(&lo->lo_owner.so_stateids)) { | |
8342 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
8343 | struct nfs4_ol_stateid, | |
8344 | st_perstateowner); | |
c6540026 | 8345 | unhash_lock_stateid(stp); |
88584818 CL |
8346 | put_ol_stateid_locked(stp, &reaplist); |
8347 | } | |
c58c6610 | 8348 | spin_unlock(&clp->cl_lock); |
043862b0 | 8349 | |
88584818 | 8350 | free_ol_stateid_reaplist(&reaplist); |
68ef3bc3 | 8351 | remove_blocked_locks(lo); |
88584818 | 8352 | nfs4_put_stateowner(&lo->lo_owner); |
043862b0 | 8353 | return nfs_ok; |
1da177e4 LT |
8354 | } |
8355 | ||
8356 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 8357 | alloc_reclaim(void) |
1da177e4 | 8358 | { |
a55370a3 | 8359 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
8360 | } |
8361 | ||
0ce0c2b5 | 8362 | bool |
6b189105 | 8363 | nfs4_has_reclaimed_state(struct xdr_netobj name, struct nfsd_net *nn) |
c7b9a459 | 8364 | { |
0ce0c2b5 | 8365 | struct nfs4_client_reclaim *crp; |
c7b9a459 | 8366 | |
52e19c09 | 8367 | crp = nfsd4_find_reclaim_client(name, nn); |
0ce0c2b5 | 8368 | return (crp && crp->cr_clp); |
c7b9a459 N |
8369 | } |
8370 | ||
1da177e4 LT |
8371 | /* |
8372 | * failure => all reset bets are off, nfserr_no_grace... | |
6b189105 SM |
8373 | * |
8374 | * The caller is responsible for freeing name.data if NULL is returned (it | |
8375 | * will be freed in nfs4_remove_reclaim_record in the normal case). | |
1da177e4 | 8376 | */ |
772a9bbb | 8377 | struct nfs4_client_reclaim * |
6ee95d1c SM |
8378 | nfs4_client_to_reclaim(struct xdr_netobj name, struct xdr_netobj princhash, |
8379 | struct nfsd_net *nn) | |
1da177e4 LT |
8380 | { |
8381 | unsigned int strhashval; | |
772a9bbb | 8382 | struct nfs4_client_reclaim *crp; |
1da177e4 | 8383 | |
a55370a3 | 8384 | crp = alloc_reclaim(); |
772a9bbb JL |
8385 | if (crp) { |
8386 | strhashval = clientstr_hashval(name); | |
8387 | INIT_LIST_HEAD(&crp->cr_strhash); | |
52e19c09 | 8388 | list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]); |
6b189105 SM |
8389 | crp->cr_name.data = name.data; |
8390 | crp->cr_name.len = name.len; | |
6ee95d1c SM |
8391 | crp->cr_princhash.data = princhash.data; |
8392 | crp->cr_princhash.len = princhash.len; | |
0ce0c2b5 | 8393 | crp->cr_clp = NULL; |
52e19c09 | 8394 | nn->reclaim_str_hashtbl_size++; |
772a9bbb JL |
8395 | } |
8396 | return crp; | |
1da177e4 LT |
8397 | } |
8398 | ||
ce30e539 | 8399 | void |
52e19c09 | 8400 | nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn) |
ce30e539 JL |
8401 | { |
8402 | list_del(&crp->cr_strhash); | |
6b189105 | 8403 | kfree(crp->cr_name.data); |
6ee95d1c | 8404 | kfree(crp->cr_princhash.data); |
ce30e539 | 8405 | kfree(crp); |
52e19c09 | 8406 | nn->reclaim_str_hashtbl_size--; |
ce30e539 JL |
8407 | } |
8408 | ||
2a4317c5 | 8409 | void |
52e19c09 | 8410 | nfs4_release_reclaim(struct nfsd_net *nn) |
1da177e4 LT |
8411 | { |
8412 | struct nfs4_client_reclaim *crp = NULL; | |
8413 | int i; | |
8414 | ||
1da177e4 | 8415 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
52e19c09 SK |
8416 | while (!list_empty(&nn->reclaim_str_hashtbl[i])) { |
8417 | crp = list_entry(nn->reclaim_str_hashtbl[i].next, | |
1da177e4 | 8418 | struct nfs4_client_reclaim, cr_strhash); |
52e19c09 | 8419 | nfs4_remove_reclaim_record(crp, nn); |
1da177e4 LT |
8420 | } |
8421 | } | |
063b0fb9 | 8422 | WARN_ON_ONCE(nn->reclaim_str_hashtbl_size); |
1da177e4 LT |
8423 | } |
8424 | ||
8425 | /* | |
8426 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
2a4317c5 | 8427 | struct nfs4_client_reclaim * |
6b189105 | 8428 | nfsd4_find_reclaim_client(struct xdr_netobj name, struct nfsd_net *nn) |
1da177e4 LT |
8429 | { |
8430 | unsigned int strhashval; | |
1da177e4 LT |
8431 | struct nfs4_client_reclaim *crp = NULL; |
8432 | ||
6b189105 | 8433 | strhashval = clientstr_hashval(name); |
52e19c09 | 8434 | list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) { |
6b189105 | 8435 | if (compare_blob(&crp->cr_name, &name) == 0) { |
1da177e4 LT |
8436 | return crp; |
8437 | } | |
8438 | } | |
8439 | return NULL; | |
8440 | } | |
8441 | ||
b37ad28b | 8442 | __be32 |
1722b046 | 8443 | nfs4_check_open_reclaim(struct nfs4_client *clp) |
1da177e4 | 8444 | { |
1722b046 | 8445 | if (test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, &clp->cl_flags)) |
3b3e7b72 JL |
8446 | return nfserr_no_grace; |
8447 | ||
1722b046 | 8448 | if (nfsd4_client_record_check(clp)) |
0fe492db TM |
8449 | return nfserr_reclaim_bad; |
8450 | ||
8451 | return nfs_ok; | |
1da177e4 LT |
8452 | } |
8453 | ||
c2f1a551 MS |
8454 | /* |
8455 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
8456 | * client may quite reasonably hang on to a delegation as long as it has | |
8457 | * the inode cached. This becomes an obvious problem the first time a | |
8458 | * client's inode cache approaches the size of the server's total memory. | |
8459 | * | |
8460 | * For now we avoid this problem by imposing a hard limit on the number | |
8461 | * of delegations, which varies according to the server's memory size. | |
8462 | */ | |
8463 | static void | |
8464 | set_max_delegations(void) | |
8465 | { | |
8466 | /* | |
8467 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
8468 | * estimates suggest that in the worst case (where every delegation | |
8469 | * is for a different inode), a delegation could take about 1.5K, | |
8470 | * giving a worst case usage of about 6% of memory. | |
8471 | */ | |
8472 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
8473 | } | |
8474 | ||
d85ed443 | 8475 | static int nfs4_state_create_net(struct net *net) |
8daae4dc SK |
8476 | { |
8477 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
8478 | int i; | |
8479 | ||
6da2ec56 KC |
8480 | nn->conf_id_hashtbl = kmalloc_array(CLIENT_HASH_SIZE, |
8481 | sizeof(struct list_head), | |
8482 | GFP_KERNEL); | |
8daae4dc | 8483 | if (!nn->conf_id_hashtbl) |
382a62e7 | 8484 | goto err; |
6da2ec56 KC |
8485 | nn->unconf_id_hashtbl = kmalloc_array(CLIENT_HASH_SIZE, |
8486 | sizeof(struct list_head), | |
8487 | GFP_KERNEL); | |
0a7ec377 SK |
8488 | if (!nn->unconf_id_hashtbl) |
8489 | goto err_unconf_id; | |
6da2ec56 KC |
8490 | nn->sessionid_hashtbl = kmalloc_array(SESSION_HASH_SIZE, |
8491 | sizeof(struct list_head), | |
8492 | GFP_KERNEL); | |
1872de0e SK |
8493 | if (!nn->sessionid_hashtbl) |
8494 | goto err_sessionid; | |
8daae4dc | 8495 | |
382a62e7 | 8496 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
8daae4dc | 8497 | INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]); |
0a7ec377 | 8498 | INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]); |
382a62e7 | 8499 | } |
1872de0e SK |
8500 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
8501 | INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]); | |
382a62e7 | 8502 | nn->conf_name_tree = RB_ROOT; |
a99454aa | 8503 | nn->unconf_name_tree = RB_ROOT; |
9cc76801 | 8504 | nn->boot_time = ktime_get_real_seconds(); |
81833de1 VA |
8505 | nn->grace_ended = false; |
8506 | nn->nfsd4_manager.block_opens = true; | |
8507 | INIT_LIST_HEAD(&nn->nfsd4_manager.list); | |
5ed58bb2 | 8508 | INIT_LIST_HEAD(&nn->client_lru); |
73758fed | 8509 | INIT_LIST_HEAD(&nn->close_lru); |
e8c69d17 | 8510 | INIT_LIST_HEAD(&nn->del_recall_lru); |
c9a49628 | 8511 | spin_lock_init(&nn->client_lock); |
e0639dc5 OK |
8512 | spin_lock_init(&nn->s2s_cp_lock); |
8513 | idr_init(&nn->s2s_cp_stateids); | |
8daae4dc | 8514 | |
0cc11a61 JL |
8515 | spin_lock_init(&nn->blocked_locks_lock); |
8516 | INIT_LIST_HEAD(&nn->blocked_locks_lru); | |
8517 | ||
09121281 | 8518 | INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main); |
7c24fa22 | 8519 | INIT_WORK(&nn->nfsd_shrinker_work, nfsd4_state_shrinker_worker); |
d85ed443 | 8520 | get_net(net); |
09121281 | 8521 | |
d17452aa QZ |
8522 | nn->nfsd_client_shrinker = shrinker_alloc(0, "nfsd-client"); |
8523 | if (!nn->nfsd_client_shrinker) | |
f385f7d2 | 8524 | goto err_shrinker; |
d17452aa QZ |
8525 | |
8526 | nn->nfsd_client_shrinker->scan_objects = nfsd4_state_shrinker_scan; | |
8527 | nn->nfsd_client_shrinker->count_objects = nfsd4_state_shrinker_count; | |
8528 | nn->nfsd_client_shrinker->private_data = nn; | |
8529 | ||
8530 | shrinker_register(nn->nfsd_client_shrinker); | |
8531 | ||
8daae4dc | 8532 | return 0; |
382a62e7 | 8533 | |
f385f7d2 DN |
8534 | err_shrinker: |
8535 | put_net(net); | |
8536 | kfree(nn->sessionid_hashtbl); | |
1872de0e | 8537 | err_sessionid: |
9b531137 | 8538 | kfree(nn->unconf_id_hashtbl); |
0a7ec377 SK |
8539 | err_unconf_id: |
8540 | kfree(nn->conf_id_hashtbl); | |
382a62e7 SK |
8541 | err: |
8542 | return -ENOMEM; | |
8daae4dc SK |
8543 | } |
8544 | ||
8545 | static void | |
4dce0ac9 | 8546 | nfs4_state_destroy_net(struct net *net) |
8daae4dc SK |
8547 | { |
8548 | int i; | |
8549 | struct nfs4_client *clp = NULL; | |
8550 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
8551 | ||
8552 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { | |
8553 | while (!list_empty(&nn->conf_id_hashtbl[i])) { | |
8554 | clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
8555 | destroy_client(clp); | |
8556 | } | |
8557 | } | |
a99454aa | 8558 | |
68ef3bc3 JL |
8559 | WARN_ON(!list_empty(&nn->blocked_locks_lru)); |
8560 | ||
2b905635 KM |
8561 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
8562 | while (!list_empty(&nn->unconf_id_hashtbl[i])) { | |
8563 | clp = list_entry(nn->unconf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
8564 | destroy_client(clp); | |
8565 | } | |
a99454aa SK |
8566 | } |
8567 | ||
1872de0e | 8568 | kfree(nn->sessionid_hashtbl); |
0a7ec377 | 8569 | kfree(nn->unconf_id_hashtbl); |
8daae4dc | 8570 | kfree(nn->conf_id_hashtbl); |
4dce0ac9 | 8571 | put_net(net); |
8daae4dc SK |
8572 | } |
8573 | ||
f252bc68 | 8574 | int |
d85ed443 | 8575 | nfs4_state_start_net(struct net *net) |
ac4d8ff2 | 8576 | { |
5e1533c7 | 8577 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b5a1a81e BF |
8578 | int ret; |
8579 | ||
681370f4 | 8580 | ret = nfs4_state_create_net(net); |
c6c7f2a8 | 8581 | if (ret) |
681370f4 | 8582 | return ret; |
d4318acd JL |
8583 | locks_start_grace(net, &nn->nfsd4_manager); |
8584 | nfsd4_client_tracking_init(net); | |
362063a5 SM |
8585 | if (nn->track_reclaim_completes && nn->reclaim_str_hashtbl_size == 0) |
8586 | goto skip_grace; | |
20b7d86f | 8587 | printk(KERN_INFO "NFSD: starting %lld-second grace period (net %x)\n", |
7e981a8a | 8588 | nn->nfsd4_grace, net->ns.inum); |
dd5e3fbc | 8589 | trace_nfsd_grace_start(nn); |
5284b44e | 8590 | queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ); |
d85ed443 | 8591 | return 0; |
362063a5 SM |
8592 | |
8593 | skip_grace: | |
8594 | printk(KERN_INFO "NFSD: no clients to reclaim, skipping NFSv4 grace period (net %x)\n", | |
8595 | net->ns.inum); | |
8596 | queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_lease * HZ); | |
8597 | nfsd4_end_grace(nn); | |
8598 | return 0; | |
d85ed443 SK |
8599 | } |
8600 | ||
8601 | /* initialization to perform when the nfsd service is started: */ | |
8602 | ||
8603 | int | |
8604 | nfs4_state_start(void) | |
8605 | { | |
8606 | int ret; | |
8607 | ||
d47b295e | 8608 | ret = rhltable_init(&nfs4_file_rhltable, &nfs4_file_rhash_params); |
b5a1a81e | 8609 | if (ret) |
d76cc46b | 8610 | return ret; |
09121281 | 8611 | |
d47b295e CL |
8612 | ret = nfsd4_create_callback_queue(); |
8613 | if (ret) { | |
8614 | rhltable_destroy(&nfs4_file_rhltable); | |
8615 | return ret; | |
8616 | } | |
8617 | ||
c2f1a551 | 8618 | set_max_delegations(); |
b5a1a81e | 8619 | return 0; |
1da177e4 LT |
8620 | } |
8621 | ||
f252bc68 | 8622 | void |
4dce0ac9 | 8623 | nfs4_state_shutdown_net(struct net *net) |
1da177e4 | 8624 | { |
1da177e4 | 8625 | struct nfs4_delegation *dp = NULL; |
1da177e4 | 8626 | struct list_head *pos, *next, reaplist; |
4dce0ac9 | 8627 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
1da177e4 | 8628 | |
d17452aa | 8629 | shrinker_free(nn->nfsd_client_shrinker); |
7c24fa22 | 8630 | cancel_work(&nn->nfsd_shrinker_work); |
4dce0ac9 SK |
8631 | cancel_delayed_work_sync(&nn->laundromat_work); |
8632 | locks_end_grace(&nn->nfsd4_manager); | |
ac55fdc4 | 8633 | |
1da177e4 | 8634 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 8635 | spin_lock(&state_lock); |
e8c69d17 | 8636 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 | 8637 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
3f29cc82 | 8638 | unhash_delegation_locked(dp, SC_STATUS_CLOSED); |
42690676 | 8639 | list_add(&dp->dl_recall_lru, &reaplist); |
1da177e4 | 8640 | } |
cdc97505 | 8641 | spin_unlock(&state_lock); |
1da177e4 LT |
8642 | list_for_each_safe(pos, next, &reaplist) { |
8643 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
42690676 | 8644 | list_del_init(&dp->dl_recall_lru); |
0af6e690 | 8645 | destroy_unhashed_deleg(dp); |
1da177e4 LT |
8646 | } |
8647 | ||
3320fef1 | 8648 | nfsd4_client_tracking_exit(net); |
4dce0ac9 | 8649 | nfs4_state_destroy_net(net); |
f4e44b39 DN |
8650 | #ifdef CONFIG_NFSD_V4_2_INTER_SSC |
8651 | nfsd4_ssc_shutdown_umount(nn); | |
8652 | #endif | |
1da177e4 LT |
8653 | } |
8654 | ||
8655 | void | |
8656 | nfs4_state_shutdown(void) | |
8657 | { | |
c3935e30 | 8658 | nfsd4_destroy_callback_queue(); |
4102db17 | 8659 | rhltable_destroy(&nfs4_file_rhltable); |
1da177e4 | 8660 | } |
8b70484c TM |
8661 | |
8662 | static void | |
8663 | get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
8664 | { | |
51100d2b OK |
8665 | if (HAS_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG) && |
8666 | CURRENT_STATEID(stateid)) | |
37c593c5 | 8667 | memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); |
8b70484c TM |
8668 | } |
8669 | ||
8670 | static void | |
8671 | put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
8672 | { | |
37c593c5 TM |
8673 | if (cstate->minorversion) { |
8674 | memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); | |
51100d2b | 8675 | SET_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG); |
37c593c5 TM |
8676 | } |
8677 | } | |
8678 | ||
8679 | void | |
8680 | clear_current_stateid(struct nfsd4_compound_state *cstate) | |
8681 | { | |
51100d2b | 8682 | CLEAR_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG); |
8b70484c TM |
8683 | } |
8684 | ||
62cd4a59 TM |
8685 | /* |
8686 | * functions to set current state id | |
8687 | */ | |
9428fe1a | 8688 | void |
b60e9859 CH |
8689 | nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, |
8690 | union nfsd4_op_u *u) | |
9428fe1a | 8691 | { |
b60e9859 | 8692 | put_stateid(cstate, &u->open_downgrade.od_stateid); |
9428fe1a TM |
8693 | } |
8694 | ||
8b70484c | 8695 | void |
b60e9859 CH |
8696 | nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, |
8697 | union nfsd4_op_u *u) | |
8b70484c | 8698 | { |
b60e9859 | 8699 | put_stateid(cstate, &u->open.op_stateid); |
8b70484c TM |
8700 | } |
8701 | ||
62cd4a59 | 8702 | void |
b60e9859 CH |
8703 | nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, |
8704 | union nfsd4_op_u *u) | |
62cd4a59 | 8705 | { |
b60e9859 | 8706 | put_stateid(cstate, &u->close.cl_stateid); |
62cd4a59 TM |
8707 | } |
8708 | ||
8709 | void | |
b60e9859 CH |
8710 | nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, |
8711 | union nfsd4_op_u *u) | |
62cd4a59 | 8712 | { |
b60e9859 | 8713 | put_stateid(cstate, &u->lock.lk_resp_stateid); |
62cd4a59 TM |
8714 | } |
8715 | ||
8716 | /* | |
8717 | * functions to consume current state id | |
8718 | */ | |
1e97b519 | 8719 | |
9428fe1a | 8720 | void |
57832e7b CH |
8721 | nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, |
8722 | union nfsd4_op_u *u) | |
9428fe1a | 8723 | { |
57832e7b | 8724 | get_stateid(cstate, &u->open_downgrade.od_stateid); |
9428fe1a TM |
8725 | } |
8726 | ||
8727 | void | |
57832e7b CH |
8728 | nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, |
8729 | union nfsd4_op_u *u) | |
9428fe1a | 8730 | { |
57832e7b | 8731 | get_stateid(cstate, &u->delegreturn.dr_stateid); |
9428fe1a TM |
8732 | } |
8733 | ||
1e97b519 | 8734 | void |
57832e7b CH |
8735 | nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, |
8736 | union nfsd4_op_u *u) | |
1e97b519 | 8737 | { |
57832e7b | 8738 | get_stateid(cstate, &u->free_stateid.fr_stateid); |
1e97b519 TM |
8739 | } |
8740 | ||
8741 | void | |
57832e7b CH |
8742 | nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, |
8743 | union nfsd4_op_u *u) | |
1e97b519 | 8744 | { |
57832e7b | 8745 | get_stateid(cstate, &u->setattr.sa_stateid); |
1e97b519 TM |
8746 | } |
8747 | ||
8b70484c | 8748 | void |
57832e7b CH |
8749 | nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, |
8750 | union nfsd4_op_u *u) | |
8b70484c | 8751 | { |
57832e7b | 8752 | get_stateid(cstate, &u->close.cl_stateid); |
8b70484c TM |
8753 | } |
8754 | ||
8755 | void | |
57832e7b CH |
8756 | nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, |
8757 | union nfsd4_op_u *u) | |
8b70484c | 8758 | { |
57832e7b | 8759 | get_stateid(cstate, &u->locku.lu_stateid); |
8b70484c | 8760 | } |
30813e27 TM |
8761 | |
8762 | void | |
57832e7b CH |
8763 | nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, |
8764 | union nfsd4_op_u *u) | |
30813e27 | 8765 | { |
57832e7b | 8766 | get_stateid(cstate, &u->read.rd_stateid); |
30813e27 TM |
8767 | } |
8768 | ||
8769 | void | |
57832e7b CH |
8770 | nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, |
8771 | union nfsd4_op_u *u) | |
30813e27 | 8772 | { |
57832e7b | 8773 | get_stateid(cstate, &u->write.wr_stateid); |
30813e27 | 8774 | } |
fd19ca36 DN |
8775 | |
8776 | /** | |
8777 | * nfsd4_deleg_getattr_conflict - Recall if GETATTR causes conflict | |
8778 | * @rqstp: RPC transaction context | |
8779 | * @inode: file to be checked for a conflict | |
c5967721 DN |
8780 | * @modified: return true if file was modified |
8781 | * @size: new size of file if modified is true | |
fd19ca36 DN |
8782 | * |
8783 | * This function is called when there is a conflict between a write | |
8784 | * delegation and a change/size GETATTR from another client. The server | |
8785 | * must either use the CB_GETATTR to get the current values of the | |
8786 | * attributes from the client that holds the delegation or recall the | |
8787 | * delegation before replying to the GETATTR. See RFC 8881 section | |
8788 | * 18.7.4. | |
8789 | * | |
fd19ca36 DN |
8790 | * Returns 0 if there is no conflict; otherwise an nfs_stat |
8791 | * code is returned. | |
8792 | */ | |
8793 | __be32 | |
c5967721 DN |
8794 | nfsd4_deleg_getattr_conflict(struct svc_rqst *rqstp, struct inode *inode, |
8795 | bool *modified, u64 *size) | |
fd19ca36 | 8796 | { |
862bee84 | 8797 | __be32 status; |
4b148854 | 8798 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
fd19ca36 | 8799 | struct file_lock_context *ctx; |
6c41d9a9 | 8800 | struct file_lock *fl; |
862bee84 | 8801 | struct nfs4_delegation *dp; |
c5967721 DN |
8802 | struct iattr attrs; |
8803 | struct nfs4_cb_fattr *ncf; | |
fd19ca36 | 8804 | |
c5967721 | 8805 | *modified = false; |
fd19ca36 DN |
8806 | ctx = locks_inode_context(inode); |
8807 | if (!ctx) | |
8808 | return 0; | |
8809 | spin_lock(&ctx->flc_lock); | |
8810 | list_for_each_entry(fl, &ctx->flc_lease, fl_list) { | |
8811 | if (fl->fl_flags == FL_LAYOUT) | |
8812 | continue; | |
8813 | if (fl->fl_lmops != &nfsd_lease_mng_ops) { | |
8814 | /* | |
8815 | * non-nfs lease, if it's a lease with F_RDLCK then | |
8816 | * we are done; there isn't any write delegation | |
8817 | * on this inode | |
8818 | */ | |
8819 | if (fl->fl_type == F_RDLCK) | |
8820 | break; | |
8821 | goto break_lease; | |
8822 | } | |
8823 | if (fl->fl_type == F_WRLCK) { | |
8824 | dp = fl->fl_owner; | |
8825 | if (dp->dl_recall.cb_clp == *(rqstp->rq_lease_breaker)) { | |
8826 | spin_unlock(&ctx->flc_lock); | |
8827 | return 0; | |
8828 | } | |
8829 | break_lease: | |
4b148854 | 8830 | nfsd_stats_wdeleg_getattr_inc(nn); |
c5967721 DN |
8831 | dp = fl->fl_owner; |
8832 | ncf = &dp->dl_cb_fattr; | |
8833 | nfs4_cb_getattr(&dp->dl_cb_fattr); | |
8834 | spin_unlock(&ctx->flc_lock); | |
8835 | wait_on_bit_timeout(&ncf->ncf_cb_flags, CB_GETATTR_BUSY, | |
8836 | TASK_INTERRUPTIBLE, NFSD_CB_GETATTR_TIMEOUT); | |
8837 | if (ncf->ncf_cb_status) { | |
8838 | /* Recall delegation only if client didn't respond */ | |
8839 | status = nfserrno(nfsd_open_break_lease(inode, NFSD_MAY_READ)); | |
8840 | if (status != nfserr_jukebox || | |
8841 | !nfsd_wait_for_delegreturn(rqstp, inode)) | |
8842 | return status; | |
8843 | } | |
8844 | if (!ncf->ncf_file_modified && | |
8845 | (ncf->ncf_initial_cinfo != ncf->ncf_cb_change || | |
8846 | ncf->ncf_cur_fsize != ncf->ncf_cb_fsize)) | |
8847 | ncf->ncf_file_modified = true; | |
8848 | if (ncf->ncf_file_modified) { | |
8849 | /* | |
8850 | * Per section 10.4.3 of RFC 8881, the server would | |
8851 | * not update the file's metadata with the client's | |
8852 | * modified size | |
8853 | */ | |
8854 | attrs.ia_mtime = attrs.ia_ctime = current_time(inode); | |
8855 | attrs.ia_valid = ATTR_MTIME | ATTR_CTIME; | |
8856 | setattr_copy(&nop_mnt_idmap, inode, &attrs); | |
8857 | mark_inode_dirty(inode); | |
8858 | ncf->ncf_cur_fsize = ncf->ncf_cb_fsize; | |
8859 | *size = ncf->ncf_cur_fsize; | |
8860 | *modified = true; | |
8861 | } | |
fd19ca36 DN |
8862 | return 0; |
8863 | } | |
8864 | break; | |
8865 | } | |
8866 | spin_unlock(&ctx->flc_lock); | |
8867 | return 0; | |
8868 | } |