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 | ||
f32f3c2d BF |
62 | #define all_ones {{~0,~0},~0} |
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; |
0162ac2b | 130 | |
66af2579 DN |
131 | static struct workqueue_struct *laundry_wq; |
132 | ||
d76cc46b DN |
133 | int nfsd4_create_laundry_wq(void) |
134 | { | |
135 | int rc = 0; | |
136 | ||
137 | laundry_wq = alloc_workqueue("%s", WQ_UNBOUND, 0, "nfsd4"); | |
138 | if (laundry_wq == NULL) | |
139 | rc = -ENOMEM; | |
140 | return rc; | |
141 | } | |
142 | ||
143 | void nfsd4_destroy_laundry_wq(void) | |
144 | { | |
145 | destroy_workqueue(laundry_wq); | |
146 | } | |
147 | ||
f0f51f5c | 148 | static bool is_session_dead(struct nfsd4_session *ses) |
66b2b9b2 | 149 | { |
f0f51f5c | 150 | return ses->se_flags & NFS4_SESSION_DEAD; |
66b2b9b2 BF |
151 | } |
152 | ||
f0f51f5c | 153 | static __be32 mark_session_dead_locked(struct nfsd4_session *ses, int ref_held_by_me) |
508dc6e1 | 154 | { |
f0f51f5c | 155 | if (atomic_read(&ses->se_ref) > ref_held_by_me) |
66b2b9b2 BF |
156 | return nfserr_jukebox; |
157 | ses->se_flags |= NFS4_SESSION_DEAD; | |
158 | return nfs_ok; | |
508dc6e1 BH |
159 | } |
160 | ||
221a6876 BF |
161 | static bool is_client_expired(struct nfs4_client *clp) |
162 | { | |
163 | return clp->cl_time == 0; | |
164 | } | |
165 | ||
3a4ea23d DN |
166 | static void nfsd4_dec_courtesy_client_count(struct nfsd_net *nn, |
167 | struct nfs4_client *clp) | |
168 | { | |
169 | if (clp->cl_state != NFSD4_ACTIVE) | |
170 | atomic_add_unless(&nn->nfsd_courtesy_clients, -1, 0); | |
171 | } | |
172 | ||
221a6876 BF |
173 | static __be32 get_client_locked(struct nfs4_client *clp) |
174 | { | |
0a880a28 TM |
175 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
176 | ||
177 | lockdep_assert_held(&nn->client_lock); | |
178 | ||
221a6876 BF |
179 | if (is_client_expired(clp)) |
180 | return nfserr_expired; | |
14ed14cc | 181 | atomic_inc(&clp->cl_rpc_users); |
3a4ea23d | 182 | nfsd4_dec_courtesy_client_count(nn, clp); |
66af2579 | 183 | clp->cl_state = NFSD4_ACTIVE; |
221a6876 BF |
184 | return nfs_ok; |
185 | } | |
186 | ||
187 | /* must be called under the client_lock */ | |
188 | static inline void | |
189 | renew_client_locked(struct nfs4_client *clp) | |
190 | { | |
191 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
192 | ||
193 | if (is_client_expired(clp)) { | |
194 | WARN_ON(1); | |
195 | printk("%s: client (clientid %08x/%08x) already expired\n", | |
196 | __func__, | |
197 | clp->cl_clientid.cl_boot, | |
198 | clp->cl_clientid.cl_id); | |
199 | return; | |
200 | } | |
201 | ||
221a6876 | 202 | list_move_tail(&clp->cl_lru, &nn->client_lru); |
20b7d86f | 203 | clp->cl_time = ktime_get_boottime_seconds(); |
3a4ea23d | 204 | nfsd4_dec_courtesy_client_count(nn, clp); |
66af2579 | 205 | clp->cl_state = NFSD4_ACTIVE; |
221a6876 BF |
206 | } |
207 | ||
ba138435 | 208 | static void put_client_renew_locked(struct nfs4_client *clp) |
221a6876 | 209 | { |
0a880a28 TM |
210 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
211 | ||
212 | lockdep_assert_held(&nn->client_lock); | |
213 | ||
14ed14cc | 214 | if (!atomic_dec_and_test(&clp->cl_rpc_users)) |
221a6876 BF |
215 | return; |
216 | if (!is_client_expired(clp)) | |
217 | renew_client_locked(clp); | |
89c905be BF |
218 | else |
219 | wake_up_all(&expiry_wq); | |
221a6876 BF |
220 | } |
221 | ||
4b24ca7d JL |
222 | static void put_client_renew(struct nfs4_client *clp) |
223 | { | |
224 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
225 | ||
14ed14cc | 226 | if (!atomic_dec_and_lock(&clp->cl_rpc_users, &nn->client_lock)) |
d6c249b4 JL |
227 | return; |
228 | if (!is_client_expired(clp)) | |
229 | renew_client_locked(clp); | |
89c905be BF |
230 | else |
231 | wake_up_all(&expiry_wq); | |
4b24ca7d JL |
232 | spin_unlock(&nn->client_lock); |
233 | } | |
234 | ||
d4e19e70 TM |
235 | static __be32 nfsd4_get_session_locked(struct nfsd4_session *ses) |
236 | { | |
237 | __be32 status; | |
238 | ||
239 | if (is_session_dead(ses)) | |
240 | return nfserr_badsession; | |
241 | status = get_client_locked(ses->se_client); | |
242 | if (status) | |
243 | return status; | |
244 | atomic_inc(&ses->se_ref); | |
245 | return nfs_ok; | |
246 | } | |
247 | ||
248 | static void nfsd4_put_session_locked(struct nfsd4_session *ses) | |
249 | { | |
250 | struct nfs4_client *clp = ses->se_client; | |
0a880a28 TM |
251 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
252 | ||
253 | lockdep_assert_held(&nn->client_lock); | |
d4e19e70 TM |
254 | |
255 | if (atomic_dec_and_test(&ses->se_ref) && is_session_dead(ses)) | |
256 | free_session(ses); | |
257 | put_client_renew_locked(clp); | |
258 | } | |
259 | ||
260 | static void nfsd4_put_session(struct nfsd4_session *ses) | |
261 | { | |
262 | struct nfs4_client *clp = ses->se_client; | |
263 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
264 | ||
265 | spin_lock(&nn->client_lock); | |
266 | nfsd4_put_session_locked(ses); | |
267 | spin_unlock(&nn->client_lock); | |
268 | } | |
269 | ||
76d348fa JL |
270 | static struct nfsd4_blocked_lock * |
271 | find_blocked_lock(struct nfs4_lockowner *lo, struct knfsd_fh *fh, | |
272 | struct nfsd_net *nn) | |
273 | { | |
274 | struct nfsd4_blocked_lock *cur, *found = NULL; | |
275 | ||
0cc11a61 | 276 | spin_lock(&nn->blocked_locks_lock); |
76d348fa JL |
277 | list_for_each_entry(cur, &lo->lo_blocked, nbl_list) { |
278 | if (fh_match(fh, &cur->nbl_fh)) { | |
279 | list_del_init(&cur->nbl_list); | |
47446d74 | 280 | WARN_ON(list_empty(&cur->nbl_lru)); |
7919d0a2 | 281 | list_del_init(&cur->nbl_lru); |
76d348fa JL |
282 | found = cur; |
283 | break; | |
284 | } | |
285 | } | |
0cc11a61 | 286 | spin_unlock(&nn->blocked_locks_lock); |
76d348fa | 287 | if (found) |
cb03f94f | 288 | locks_delete_block(&found->nbl_lock); |
76d348fa JL |
289 | return found; |
290 | } | |
291 | ||
292 | static struct nfsd4_blocked_lock * | |
293 | find_or_allocate_block(struct nfs4_lockowner *lo, struct knfsd_fh *fh, | |
294 | struct nfsd_net *nn) | |
295 | { | |
296 | struct nfsd4_blocked_lock *nbl; | |
297 | ||
298 | nbl = find_blocked_lock(lo, fh, nn); | |
299 | if (!nbl) { | |
300 | nbl= kmalloc(sizeof(*nbl), GFP_KERNEL); | |
301 | if (nbl) { | |
e1e8399e VA |
302 | INIT_LIST_HEAD(&nbl->nbl_list); |
303 | INIT_LIST_HEAD(&nbl->nbl_lru); | |
76d348fa JL |
304 | fh_copy_shallow(&nbl->nbl_fh, fh); |
305 | locks_init_lock(&nbl->nbl_lock); | |
47446d74 | 306 | kref_init(&nbl->nbl_kref); |
76d348fa JL |
307 | nfsd4_init_cb(&nbl->nbl_cb, lo->lo_owner.so_client, |
308 | &nfsd4_cb_notify_lock_ops, | |
309 | NFSPROC4_CLNT_CB_NOTIFY_LOCK); | |
310 | } | |
311 | } | |
312 | return nbl; | |
313 | } | |
314 | ||
47446d74 VA |
315 | static void |
316 | free_nbl(struct kref *kref) | |
317 | { | |
318 | struct nfsd4_blocked_lock *nbl; | |
319 | ||
320 | nbl = container_of(kref, struct nfsd4_blocked_lock, nbl_kref); | |
321 | kfree(nbl); | |
322 | } | |
323 | ||
76d348fa JL |
324 | static void |
325 | free_blocked_lock(struct nfsd4_blocked_lock *nbl) | |
326 | { | |
6aaafc43 | 327 | locks_delete_block(&nbl->nbl_lock); |
76d348fa | 328 | locks_release_private(&nbl->nbl_lock); |
47446d74 | 329 | kref_put(&nbl->nbl_kref, free_nbl); |
76d348fa JL |
330 | } |
331 | ||
68ef3bc3 JL |
332 | static void |
333 | remove_blocked_locks(struct nfs4_lockowner *lo) | |
334 | { | |
335 | struct nfs4_client *clp = lo->lo_owner.so_client; | |
336 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
337 | struct nfsd4_blocked_lock *nbl; | |
338 | LIST_HEAD(reaplist); | |
339 | ||
340 | /* Dequeue all blocked locks */ | |
341 | spin_lock(&nn->blocked_locks_lock); | |
342 | while (!list_empty(&lo->lo_blocked)) { | |
343 | nbl = list_first_entry(&lo->lo_blocked, | |
344 | struct nfsd4_blocked_lock, | |
345 | nbl_list); | |
346 | list_del_init(&nbl->nbl_list); | |
47446d74 | 347 | WARN_ON(list_empty(&nbl->nbl_lru)); |
68ef3bc3 JL |
348 | list_move(&nbl->nbl_lru, &reaplist); |
349 | } | |
350 | spin_unlock(&nn->blocked_locks_lock); | |
351 | ||
352 | /* Now free them */ | |
353 | while (!list_empty(&reaplist)) { | |
354 | nbl = list_first_entry(&reaplist, struct nfsd4_blocked_lock, | |
355 | nbl_lru); | |
356 | list_del_init(&nbl->nbl_lru); | |
68ef3bc3 JL |
357 | free_blocked_lock(nbl); |
358 | } | |
359 | } | |
360 | ||
f456458e JL |
361 | static void |
362 | nfsd4_cb_notify_lock_prepare(struct nfsd4_callback *cb) | |
363 | { | |
364 | struct nfsd4_blocked_lock *nbl = container_of(cb, | |
365 | struct nfsd4_blocked_lock, nbl_cb); | |
366 | locks_delete_block(&nbl->nbl_lock); | |
367 | } | |
368 | ||
76d348fa JL |
369 | static int |
370 | nfsd4_cb_notify_lock_done(struct nfsd4_callback *cb, struct rpc_task *task) | |
371 | { | |
1035d654 CL |
372 | trace_nfsd_cb_notify_lock_done(&zero_stateid, task); |
373 | ||
76d348fa JL |
374 | /* |
375 | * Since this is just an optimization, we don't try very hard if it | |
376 | * turns out not to succeed. We'll requeue it on NFS4ERR_DELAY, and | |
377 | * just quit trying on anything else. | |
378 | */ | |
379 | switch (task->tk_status) { | |
380 | case -NFS4ERR_DELAY: | |
381 | rpc_delay(task, 1 * HZ); | |
382 | return 0; | |
383 | default: | |
384 | return 1; | |
385 | } | |
386 | } | |
387 | ||
388 | static void | |
389 | nfsd4_cb_notify_lock_release(struct nfsd4_callback *cb) | |
390 | { | |
391 | struct nfsd4_blocked_lock *nbl = container_of(cb, | |
392 | struct nfsd4_blocked_lock, nbl_cb); | |
393 | ||
394 | free_blocked_lock(nbl); | |
395 | } | |
396 | ||
397 | static const struct nfsd4_callback_ops nfsd4_cb_notify_lock_ops = { | |
f456458e | 398 | .prepare = nfsd4_cb_notify_lock_prepare, |
76d348fa JL |
399 | .done = nfsd4_cb_notify_lock_done, |
400 | .release = nfsd4_cb_notify_lock_release, | |
401 | }; | |
402 | ||
ebd9d2c2 BF |
403 | /* |
404 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
405 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
406 | * only what share bits are currently in force, but also what | |
407 | * combinations of share bits previous opens have used. This allows us | |
3dcd1d8a BF |
408 | * to enforce the recommendation in |
409 | * https://datatracker.ietf.org/doc/html/rfc7530#section-16.19.4 that | |
410 | * the server return an error if the client attempt to downgrade to a | |
411 | * combination of share bits not explicable by closing some of its | |
412 | * previous opens. | |
ebd9d2c2 | 413 | * |
3dcd1d8a | 414 | * This enforcement is arguably incomplete, since we don't keep |
ebd9d2c2 BF |
415 | * track of access/deny bit combinations; so, e.g., we allow: |
416 | * | |
417 | * OPEN allow read, deny write | |
418 | * OPEN allow both, deny none | |
419 | * DOWNGRADE allow read, deny none | |
420 | * | |
421 | * which we should reject. | |
3dcd1d8a BF |
422 | * |
423 | * But you could also argue that our current code is already overkill, | |
424 | * since it only exists to return NFS4ERR_INVAL on incorrect client | |
425 | * behavior. | |
ebd9d2c2 BF |
426 | */ |
427 | static unsigned int | |
428 | bmap_to_share_mode(unsigned long bmap) | |
429 | { | |
430 | int i; | |
431 | unsigned int access = 0; | |
432 | ||
433 | for (i = 1; i < 4; i++) { | |
434 | if (test_bit(i, &bmap)) | |
435 | access |= i; | |
436 | } | |
437 | return access; | |
438 | } | |
439 | ||
440 | /* set share access for a given stateid */ | |
441 | static inline void | |
442 | set_access(u32 access, struct nfs4_ol_stateid *stp) | |
443 | { | |
444 | unsigned char mask = 1 << access; | |
445 | ||
446 | WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH); | |
447 | stp->st_access_bmap |= mask; | |
448 | } | |
449 | ||
450 | /* clear share access for a given stateid */ | |
451 | static inline void | |
452 | clear_access(u32 access, struct nfs4_ol_stateid *stp) | |
453 | { | |
454 | unsigned char mask = 1 << access; | |
455 | ||
456 | WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH); | |
457 | stp->st_access_bmap &= ~mask; | |
458 | } | |
459 | ||
460 | /* test whether a given stateid has access */ | |
461 | static inline bool | |
462 | test_access(u32 access, struct nfs4_ol_stateid *stp) | |
463 | { | |
464 | unsigned char mask = 1 << access; | |
465 | ||
466 | return (bool)(stp->st_access_bmap & mask); | |
467 | } | |
468 | ||
469 | /* set share deny for a given stateid */ | |
470 | static inline void | |
471 | set_deny(u32 deny, struct nfs4_ol_stateid *stp) | |
472 | { | |
473 | unsigned char mask = 1 << deny; | |
474 | ||
475 | WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH); | |
476 | stp->st_deny_bmap |= mask; | |
477 | } | |
478 | ||
479 | /* clear share deny for a given stateid */ | |
480 | static inline void | |
481 | clear_deny(u32 deny, struct nfs4_ol_stateid *stp) | |
482 | { | |
483 | unsigned char mask = 1 << deny; | |
484 | ||
485 | WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH); | |
486 | stp->st_deny_bmap &= ~mask; | |
487 | } | |
488 | ||
489 | /* test whether a given stateid is denying specific access */ | |
490 | static inline bool | |
491 | test_deny(u32 deny, struct nfs4_ol_stateid *stp) | |
492 | { | |
493 | unsigned char mask = 1 << deny; | |
494 | ||
495 | return (bool)(stp->st_deny_bmap & mask); | |
496 | } | |
497 | ||
498 | static int nfs4_access_to_omode(u32 access) | |
499 | { | |
500 | switch (access & NFS4_SHARE_ACCESS_BOTH) { | |
501 | case NFS4_SHARE_ACCESS_READ: | |
502 | return O_RDONLY; | |
503 | case NFS4_SHARE_ACCESS_WRITE: | |
504 | return O_WRONLY; | |
505 | case NFS4_SHARE_ACCESS_BOTH: | |
506 | return O_RDWR; | |
507 | } | |
508 | WARN_ON_ONCE(1); | |
509 | return O_RDONLY; | |
510 | } | |
511 | ||
512 | static inline int | |
513 | access_permit_read(struct nfs4_ol_stateid *stp) | |
514 | { | |
515 | return test_access(NFS4_SHARE_ACCESS_READ, stp) || | |
516 | test_access(NFS4_SHARE_ACCESS_BOTH, stp) || | |
517 | test_access(NFS4_SHARE_ACCESS_WRITE, stp); | |
518 | } | |
519 | ||
520 | static inline int | |
521 | access_permit_write(struct nfs4_ol_stateid *stp) | |
522 | { | |
523 | return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || | |
524 | test_access(NFS4_SHARE_ACCESS_BOTH, stp); | |
525 | } | |
526 | ||
b5971afa KM |
527 | static inline struct nfs4_stateowner * |
528 | nfs4_get_stateowner(struct nfs4_stateowner *sop) | |
529 | { | |
530 | atomic_inc(&sop->so_count); | |
531 | return sop; | |
532 | } | |
533 | ||
7ffb5880 | 534 | static int |
d4f0489f | 535 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner) |
7ffb5880 TM |
536 | { |
537 | return (sop->so_owner.len == owner->len) && | |
d4f0489f | 538 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len); |
7ffb5880 TM |
539 | } |
540 | ||
541 | static struct nfs4_openowner * | |
542 | find_openstateowner_str_locked(unsigned int hashval, struct nfsd4_open *open, | |
d4f0489f | 543 | struct nfs4_client *clp) |
7ffb5880 TM |
544 | { |
545 | struct nfs4_stateowner *so; | |
7ffb5880 | 546 | |
d4f0489f | 547 | lockdep_assert_held(&clp->cl_lock); |
7ffb5880 | 548 | |
d4f0489f TM |
549 | list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[hashval], |
550 | so_strhash) { | |
7ffb5880 TM |
551 | if (!so->so_is_open_owner) |
552 | continue; | |
b5971afa KM |
553 | if (same_owner_str(so, &open->op_owner)) |
554 | return openowner(nfs4_get_stateowner(so)); | |
7ffb5880 TM |
555 | } |
556 | return NULL; | |
557 | } | |
558 | ||
559 | static struct nfs4_openowner * | |
560 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, | |
d4f0489f | 561 | struct nfs4_client *clp) |
7ffb5880 TM |
562 | { |
563 | struct nfs4_openowner *oo; | |
564 | ||
d4f0489f TM |
565 | spin_lock(&clp->cl_lock); |
566 | oo = find_openstateowner_str_locked(hashval, open, clp); | |
567 | spin_unlock(&clp->cl_lock); | |
7ffb5880 TM |
568 | return oo; |
569 | } | |
570 | ||
1da177e4 LT |
571 | static inline u32 |
572 | opaque_hashval(const void *ptr, int nbytes) | |
573 | { | |
574 | unsigned char *cptr = (unsigned char *) ptr; | |
575 | ||
576 | u32 x = 0; | |
577 | while (nbytes--) { | |
578 | x *= 37; | |
579 | x += *cptr++; | |
580 | } | |
581 | return x; | |
582 | } | |
583 | ||
5b095e99 | 584 | static void nfsd4_free_file_rcu(struct rcu_head *rcu) |
32513b40 | 585 | { |
5b095e99 JL |
586 | struct nfs4_file *fp = container_of(rcu, struct nfs4_file, fi_rcu); |
587 | ||
588 | kmem_cache_free(file_slab, fp); | |
32513b40 BF |
589 | } |
590 | ||
e6ba76e1 | 591 | void |
13cd2184 N |
592 | put_nfs4_file(struct nfs4_file *fi) |
593 | { | |
d47b295e | 594 | if (refcount_dec_and_test(&fi->fi_ref)) { |
3341678f | 595 | nfsd4_file_hash_remove(fi); |
8287f009 | 596 | WARN_ON_ONCE(!list_empty(&fi->fi_clnt_odstate)); |
5b095e99 JL |
597 | WARN_ON_ONCE(!list_empty(&fi->fi_delegations)); |
598 | call_rcu(&fi->fi_rcu, nfsd4_free_file_rcu); | |
8b671b80 | 599 | } |
13cd2184 N |
600 | } |
601 | ||
eb82dd39 | 602 | static struct nfsd_file * |
de18643d TM |
603 | __nfs4_get_fd(struct nfs4_file *f, int oflag) |
604 | { | |
605 | if (f->fi_fds[oflag]) | |
eb82dd39 | 606 | return nfsd_file_get(f->fi_fds[oflag]); |
de18643d TM |
607 | return NULL; |
608 | } | |
609 | ||
eb82dd39 | 610 | static struct nfsd_file * |
de18643d TM |
611 | find_writeable_file_locked(struct nfs4_file *f) |
612 | { | |
eb82dd39 | 613 | struct nfsd_file *ret; |
de18643d TM |
614 | |
615 | lockdep_assert_held(&f->fi_lock); | |
616 | ||
617 | ret = __nfs4_get_fd(f, O_WRONLY); | |
618 | if (!ret) | |
619 | ret = __nfs4_get_fd(f, O_RDWR); | |
620 | return ret; | |
621 | } | |
622 | ||
eb82dd39 | 623 | static struct nfsd_file * |
de18643d TM |
624 | find_writeable_file(struct nfs4_file *f) |
625 | { | |
eb82dd39 | 626 | struct nfsd_file *ret; |
de18643d TM |
627 | |
628 | spin_lock(&f->fi_lock); | |
629 | ret = find_writeable_file_locked(f); | |
630 | spin_unlock(&f->fi_lock); | |
631 | ||
632 | return ret; | |
633 | } | |
634 | ||
eb82dd39 JL |
635 | static struct nfsd_file * |
636 | find_readable_file_locked(struct nfs4_file *f) | |
de18643d | 637 | { |
eb82dd39 | 638 | struct nfsd_file *ret; |
de18643d TM |
639 | |
640 | lockdep_assert_held(&f->fi_lock); | |
641 | ||
642 | ret = __nfs4_get_fd(f, O_RDONLY); | |
643 | if (!ret) | |
644 | ret = __nfs4_get_fd(f, O_RDWR); | |
645 | return ret; | |
646 | } | |
647 | ||
eb82dd39 | 648 | static struct nfsd_file * |
de18643d TM |
649 | find_readable_file(struct nfs4_file *f) |
650 | { | |
eb82dd39 | 651 | struct nfsd_file *ret; |
de18643d TM |
652 | |
653 | spin_lock(&f->fi_lock); | |
654 | ret = find_readable_file_locked(f); | |
655 | spin_unlock(&f->fi_lock); | |
656 | ||
657 | return ret; | |
658 | } | |
659 | ||
eb82dd39 | 660 | struct nfsd_file * |
de18643d TM |
661 | find_any_file(struct nfs4_file *f) |
662 | { | |
eb82dd39 | 663 | struct nfsd_file *ret; |
de18643d | 664 | |
a451b123 TM |
665 | if (!f) |
666 | return NULL; | |
de18643d TM |
667 | spin_lock(&f->fi_lock); |
668 | ret = __nfs4_get_fd(f, O_RDWR); | |
669 | if (!ret) { | |
670 | ret = __nfs4_get_fd(f, O_WRONLY); | |
671 | if (!ret) | |
672 | ret = __nfs4_get_fd(f, O_RDONLY); | |
673 | } | |
674 | spin_unlock(&f->fi_lock); | |
675 | return ret; | |
676 | } | |
677 | ||
e0aa6510 | 678 | static struct nfsd_file *find_any_file_locked(struct nfs4_file *f) |
9affa435 | 679 | { |
e0aa6510 JL |
680 | lockdep_assert_held(&f->fi_lock); |
681 | ||
682 | if (f->fi_fds[O_RDWR]) | |
683 | return f->fi_fds[O_RDWR]; | |
684 | if (f->fi_fds[O_WRONLY]) | |
685 | return f->fi_fds[O_WRONLY]; | |
686 | if (f->fi_fds[O_RDONLY]) | |
687 | return f->fi_fds[O_RDONLY]; | |
688 | return NULL; | |
689 | } | |
690 | ||
691 | static struct nfsd_file *find_deleg_file_locked(struct nfs4_file *f) | |
692 | { | |
693 | lockdep_assert_held(&f->fi_lock); | |
9affa435 | 694 | |
9affa435 | 695 | if (f->fi_deleg_file) |
e0aa6510 JL |
696 | return f->fi_deleg_file; |
697 | return NULL; | |
9affa435 BF |
698 | } |
699 | ||
02a3508d | 700 | static atomic_long_t num_delegations; |
697ce9be | 701 | unsigned long max_delegations; |
ef0f3390 N |
702 | |
703 | /* | |
704 | * Open owner state (share locks) | |
705 | */ | |
706 | ||
16bfdaaf BF |
707 | /* hash tables for lock and open owners */ |
708 | #define OWNER_HASH_BITS 8 | |
709 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
710 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
ef0f3390 | 711 | |
d4f0489f | 712 | static unsigned int ownerstr_hashval(struct xdr_netobj *ownername) |
ddc04c41 BF |
713 | { |
714 | unsigned int ret; | |
715 | ||
716 | ret = opaque_hashval(ownername->data, ownername->len); | |
16bfdaaf | 717 | return ret & OWNER_HASH_MASK; |
ddc04c41 | 718 | } |
ef0f3390 | 719 | |
d47b295e | 720 | static struct rhltable nfs4_file_rhltable ____cacheline_aligned_in_smp; |
ca943217 | 721 | |
d47b295e CL |
722 | static const struct rhashtable_params nfs4_file_rhash_params = { |
723 | .key_len = sizeof_field(struct nfs4_file, fi_inode), | |
724 | .key_offset = offsetof(struct nfs4_file, fi_inode), | |
725 | .head_offset = offsetof(struct nfs4_file, fi_rlist), | |
ca943217 | 726 | |
d47b295e CL |
727 | /* |
728 | * Start with a single page hash table to reduce resizing churn | |
729 | * on light workloads. | |
730 | */ | |
731 | .min_size = 256, | |
732 | .automatic_shrinking = true, | |
733 | }; | |
ef0f3390 | 734 | |
3d694271 DN |
735 | /* |
736 | * Check if courtesy clients have conflicting access and resolve it if possible | |
737 | * | |
738 | * access: is op_share_access if share_access is true. | |
739 | * Check if access mode, op_share_access, would conflict with | |
740 | * the current deny mode of the file 'fp'. | |
741 | * access: is op_share_deny if share_access is false. | |
742 | * Check if the deny mode, op_share_deny, would conflict with | |
743 | * current access of the file 'fp'. | |
744 | * stp: skip checking this entry. | |
745 | * new_stp: normal open, not open upgrade. | |
746 | * | |
747 | * Function returns: | |
748 | * false - access/deny mode conflict with normal client. | |
749 | * true - no conflict or conflict with courtesy client(s) is resolved. | |
750 | */ | |
751 | static bool | |
752 | nfs4_resolve_deny_conflicts_locked(struct nfs4_file *fp, bool new_stp, | |
753 | struct nfs4_ol_stateid *stp, u32 access, bool share_access) | |
754 | { | |
755 | struct nfs4_ol_stateid *st; | |
756 | bool resolvable = true; | |
757 | unsigned char bmap; | |
758 | struct nfsd_net *nn; | |
759 | struct nfs4_client *clp; | |
760 | ||
761 | lockdep_assert_held(&fp->fi_lock); | |
762 | list_for_each_entry(st, &fp->fi_stateids, st_perfile) { | |
763 | /* ignore lock stateid */ | |
764 | if (st->st_openstp) | |
765 | continue; | |
766 | if (st == stp && new_stp) | |
767 | continue; | |
768 | /* check file access against deny mode or vice versa */ | |
769 | bmap = share_access ? st->st_deny_bmap : st->st_access_bmap; | |
770 | if (!(access & bmap_to_share_mode(bmap))) | |
771 | continue; | |
772 | clp = st->st_stid.sc_client; | |
773 | if (try_to_expire_client(clp)) | |
774 | continue; | |
775 | resolvable = false; | |
776 | break; | |
777 | } | |
778 | if (resolvable) { | |
779 | clp = stp->st_stid.sc_client; | |
780 | nn = net_generic(clp->net, nfsd_net_id); | |
781 | mod_delayed_work(laundry_wq, &nn->laundromat_work, 0); | |
782 | } | |
783 | return resolvable; | |
784 | } | |
785 | ||
12659651 JL |
786 | static void |
787 | __nfs4_file_get_access(struct nfs4_file *fp, u32 access) | |
3477565e | 788 | { |
7214e860 JL |
789 | lockdep_assert_held(&fp->fi_lock); |
790 | ||
12659651 JL |
791 | if (access & NFS4_SHARE_ACCESS_WRITE) |
792 | atomic_inc(&fp->fi_access[O_WRONLY]); | |
793 | if (access & NFS4_SHARE_ACCESS_READ) | |
794 | atomic_inc(&fp->fi_access[O_RDONLY]); | |
3477565e BF |
795 | } |
796 | ||
12659651 JL |
797 | static __be32 |
798 | nfs4_file_get_access(struct nfs4_file *fp, u32 access) | |
998db52c | 799 | { |
7214e860 JL |
800 | lockdep_assert_held(&fp->fi_lock); |
801 | ||
12659651 JL |
802 | /* Does this access mode make sense? */ |
803 | if (access & ~NFS4_SHARE_ACCESS_BOTH) | |
804 | return nfserr_inval; | |
805 | ||
baeb4ff0 JL |
806 | /* Does it conflict with a deny mode already set? */ |
807 | if ((access & fp->fi_share_deny) != 0) | |
808 | return nfserr_share_denied; | |
809 | ||
12659651 JL |
810 | __nfs4_file_get_access(fp, access); |
811 | return nfs_ok; | |
998db52c BF |
812 | } |
813 | ||
baeb4ff0 JL |
814 | static __be32 nfs4_file_check_deny(struct nfs4_file *fp, u32 deny) |
815 | { | |
816 | /* Common case is that there is no deny mode. */ | |
817 | if (deny) { | |
818 | /* Does this deny mode make sense? */ | |
819 | if (deny & ~NFS4_SHARE_DENY_BOTH) | |
820 | return nfserr_inval; | |
821 | ||
822 | if ((deny & NFS4_SHARE_DENY_READ) && | |
823 | atomic_read(&fp->fi_access[O_RDONLY])) | |
824 | return nfserr_share_denied; | |
825 | ||
826 | if ((deny & NFS4_SHARE_DENY_WRITE) && | |
827 | atomic_read(&fp->fi_access[O_WRONLY])) | |
828 | return nfserr_share_denied; | |
829 | } | |
830 | return nfs_ok; | |
831 | } | |
832 | ||
998db52c | 833 | static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
f9d7562f | 834 | { |
de18643d TM |
835 | might_lock(&fp->fi_lock); |
836 | ||
837 | if (atomic_dec_and_lock(&fp->fi_access[oflag], &fp->fi_lock)) { | |
fd4f83fd JL |
838 | struct nfsd_file *f1 = NULL; |
839 | struct nfsd_file *f2 = NULL; | |
de18643d | 840 | |
6d338b51 | 841 | swap(f1, fp->fi_fds[oflag]); |
0c7c3e67 | 842 | if (atomic_read(&fp->fi_access[1 - oflag]) == 0) |
6d338b51 | 843 | swap(f2, fp->fi_fds[O_RDWR]); |
de18643d TM |
844 | spin_unlock(&fp->fi_lock); |
845 | if (f1) | |
dcf3f809 | 846 | nfsd_file_put(f1); |
de18643d | 847 | if (f2) |
dcf3f809 | 848 | nfsd_file_put(f2); |
f9d7562f BF |
849 | } |
850 | } | |
851 | ||
12659651 | 852 | static void nfs4_file_put_access(struct nfs4_file *fp, u32 access) |
998db52c | 853 | { |
12659651 JL |
854 | WARN_ON_ONCE(access & ~NFS4_SHARE_ACCESS_BOTH); |
855 | ||
856 | if (access & NFS4_SHARE_ACCESS_WRITE) | |
998db52c | 857 | __nfs4_file_put_access(fp, O_WRONLY); |
12659651 JL |
858 | if (access & NFS4_SHARE_ACCESS_READ) |
859 | __nfs4_file_put_access(fp, O_RDONLY); | |
998db52c BF |
860 | } |
861 | ||
8287f009 SB |
862 | /* |
863 | * Allocate a new open/delegation state counter. This is needed for | |
864 | * pNFS for proper return on close semantics. | |
865 | * | |
866 | * Note that we only allocate it for pNFS-enabled exports, otherwise | |
867 | * all pointers to struct nfs4_clnt_odstate are always NULL. | |
868 | */ | |
869 | static struct nfs4_clnt_odstate * | |
870 | alloc_clnt_odstate(struct nfs4_client *clp) | |
871 | { | |
872 | struct nfs4_clnt_odstate *co; | |
873 | ||
874 | co = kmem_cache_zalloc(odstate_slab, GFP_KERNEL); | |
875 | if (co) { | |
876 | co->co_client = clp; | |
cff7cb2e | 877 | refcount_set(&co->co_odcount, 1); |
8287f009 SB |
878 | } |
879 | return co; | |
880 | } | |
881 | ||
882 | static void | |
883 | hash_clnt_odstate_locked(struct nfs4_clnt_odstate *co) | |
884 | { | |
885 | struct nfs4_file *fp = co->co_file; | |
886 | ||
887 | lockdep_assert_held(&fp->fi_lock); | |
888 | list_add(&co->co_perfile, &fp->fi_clnt_odstate); | |
889 | } | |
890 | ||
891 | static inline void | |
892 | get_clnt_odstate(struct nfs4_clnt_odstate *co) | |
893 | { | |
894 | if (co) | |
cff7cb2e | 895 | refcount_inc(&co->co_odcount); |
8287f009 SB |
896 | } |
897 | ||
898 | static void | |
899 | put_clnt_odstate(struct nfs4_clnt_odstate *co) | |
900 | { | |
901 | struct nfs4_file *fp; | |
902 | ||
903 | if (!co) | |
904 | return; | |
905 | ||
906 | fp = co->co_file; | |
cff7cb2e | 907 | if (refcount_dec_and_lock(&co->co_odcount, &fp->fi_lock)) { |
8287f009 SB |
908 | list_del(&co->co_perfile); |
909 | spin_unlock(&fp->fi_lock); | |
910 | ||
911 | nfsd4_return_all_file_layouts(co->co_client, fp); | |
912 | kmem_cache_free(odstate_slab, co); | |
913 | } | |
914 | } | |
915 | ||
916 | static struct nfs4_clnt_odstate * | |
917 | find_or_hash_clnt_odstate(struct nfs4_file *fp, struct nfs4_clnt_odstate *new) | |
918 | { | |
919 | struct nfs4_clnt_odstate *co; | |
920 | struct nfs4_client *cl; | |
921 | ||
922 | if (!new) | |
923 | return NULL; | |
924 | ||
925 | cl = new->co_client; | |
926 | ||
927 | spin_lock(&fp->fi_lock); | |
928 | list_for_each_entry(co, &fp->fi_clnt_odstate, co_perfile) { | |
929 | if (co->co_client == cl) { | |
930 | get_clnt_odstate(co); | |
931 | goto out; | |
932 | } | |
933 | } | |
934 | co = new; | |
935 | co->co_file = fp; | |
936 | hash_clnt_odstate_locked(new); | |
937 | out: | |
938 | spin_unlock(&fp->fi_lock); | |
939 | return co; | |
940 | } | |
941 | ||
d19fb70d KM |
942 | struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct kmem_cache *slab, |
943 | void (*sc_free)(struct nfs4_stid *)) | |
2a74aba7 | 944 | { |
3abdb607 | 945 | struct nfs4_stid *stid; |
6136d2b4 | 946 | int new_id; |
2a74aba7 | 947 | |
f8338834 | 948 | stid = kmem_cache_zalloc(slab, GFP_KERNEL); |
3abdb607 BF |
949 | if (!stid) |
950 | return NULL; | |
951 | ||
4770d722 JL |
952 | idr_preload(GFP_KERNEL); |
953 | spin_lock(&cl->cl_lock); | |
78599c42 BF |
954 | /* Reserving 0 for start of file in nfsdfs "states" file: */ |
955 | new_id = idr_alloc_cyclic(&cl->cl_stateids, stid, 1, 0, GFP_NOWAIT); | |
4770d722 JL |
956 | spin_unlock(&cl->cl_lock); |
957 | idr_preload_end(); | |
ebd6c707 | 958 | if (new_id < 0) |
3abdb607 | 959 | goto out_free; |
d19fb70d KM |
960 | |
961 | stid->sc_free = sc_free; | |
2a74aba7 | 962 | stid->sc_client = cl; |
3abdb607 BF |
963 | stid->sc_stateid.si_opaque.so_id = new_id; |
964 | stid->sc_stateid.si_opaque.so_clid = cl->cl_clientid; | |
2a74aba7 | 965 | /* Will be incremented before return to client: */ |
a15dfcd5 | 966 | refcount_set(&stid->sc_count, 1); |
9767feb2 | 967 | spin_lock_init(&stid->sc_lock); |
624322f1 | 968 | INIT_LIST_HEAD(&stid->sc_cp_list); |
996e0938 | 969 | |
996e0938 | 970 | /* |
3abdb607 BF |
971 | * It shouldn't be a problem to reuse an opaque stateid value. |
972 | * I don't think it is for 4.1. But with 4.0 I worry that, for | |
973 | * example, a stray write retransmission could be accepted by | |
974 | * the server when it should have been rejected. Therefore, | |
975 | * adopt a trick from the sctp code to attempt to maximize the | |
976 | * amount of time until an id is reused, by ensuring they always | |
977 | * "increase" (mod INT_MAX): | |
996e0938 | 978 | */ |
3abdb607 BF |
979 | return stid; |
980 | out_free: | |
2c44a234 | 981 | kmem_cache_free(slab, stid); |
3abdb607 | 982 | return NULL; |
2a74aba7 BF |
983 | } |
984 | ||
e0639dc5 OK |
985 | /* |
986 | * Create a unique stateid_t to represent each COPY. | |
987 | */ | |
624322f1 | 988 | static int nfs4_init_cp_state(struct nfsd_net *nn, copy_stateid_t *stid, |
781fde1a | 989 | unsigned char cs_type) |
e0639dc5 OK |
990 | { |
991 | int new_id; | |
992 | ||
781fde1a CL |
993 | stid->cs_stid.si_opaque.so_clid.cl_boot = (u32)nn->boot_time; |
994 | stid->cs_stid.si_opaque.so_clid.cl_id = nn->s2s_cp_cl_id; | |
995 | stid->cs_type = cs_type; | |
624322f1 | 996 | |
e0639dc5 OK |
997 | idr_preload(GFP_KERNEL); |
998 | spin_lock(&nn->s2s_cp_lock); | |
624322f1 | 999 | new_id = idr_alloc_cyclic(&nn->s2s_cp_stateids, stid, 0, 0, GFP_NOWAIT); |
781fde1a CL |
1000 | stid->cs_stid.si_opaque.so_id = new_id; |
1001 | stid->cs_stid.si_generation = 1; | |
e0639dc5 OK |
1002 | spin_unlock(&nn->s2s_cp_lock); |
1003 | idr_preload_end(); | |
1004 | if (new_id < 0) | |
1005 | return 0; | |
e0639dc5 OK |
1006 | return 1; |
1007 | } | |
1008 | ||
624322f1 OK |
1009 | int nfs4_init_copy_state(struct nfsd_net *nn, struct nfsd4_copy *copy) |
1010 | { | |
1011 | return nfs4_init_cp_state(nn, ©->cp_stateid, NFS4_COPY_STID); | |
1012 | } | |
1013 | ||
1014 | struct nfs4_cpntf_state *nfs4_alloc_init_cpntf_state(struct nfsd_net *nn, | |
1015 | struct nfs4_stid *p_stid) | |
1016 | { | |
1017 | struct nfs4_cpntf_state *cps; | |
1018 | ||
1019 | cps = kzalloc(sizeof(struct nfs4_cpntf_state), GFP_KERNEL); | |
1020 | if (!cps) | |
1021 | return NULL; | |
20b7d86f | 1022 | cps->cpntf_time = ktime_get_boottime_seconds(); |
781fde1a | 1023 | refcount_set(&cps->cp_stateid.cs_count, 1); |
624322f1 OK |
1024 | if (!nfs4_init_cp_state(nn, &cps->cp_stateid, NFS4_COPYNOTIFY_STID)) |
1025 | goto out_free; | |
1026 | spin_lock(&nn->s2s_cp_lock); | |
1027 | list_add(&cps->cp_list, &p_stid->sc_cp_list); | |
1028 | spin_unlock(&nn->s2s_cp_lock); | |
1029 | return cps; | |
1030 | out_free: | |
1031 | kfree(cps); | |
1032 | return NULL; | |
1033 | } | |
1034 | ||
1035 | void nfs4_free_copy_state(struct nfsd4_copy *copy) | |
e0639dc5 OK |
1036 | { |
1037 | struct nfsd_net *nn; | |
1038 | ||
781fde1a | 1039 | WARN_ON_ONCE(copy->cp_stateid.cs_type != NFS4_COPY_STID); |
e0639dc5 OK |
1040 | nn = net_generic(copy->cp_clp->net, nfsd_net_id); |
1041 | spin_lock(&nn->s2s_cp_lock); | |
624322f1 | 1042 | idr_remove(&nn->s2s_cp_stateids, |
781fde1a | 1043 | copy->cp_stateid.cs_stid.si_opaque.so_id); |
624322f1 OK |
1044 | spin_unlock(&nn->s2s_cp_lock); |
1045 | } | |
1046 | ||
1047 | static void nfs4_free_cpntf_statelist(struct net *net, struct nfs4_stid *stid) | |
1048 | { | |
1049 | struct nfs4_cpntf_state *cps; | |
1050 | struct nfsd_net *nn; | |
1051 | ||
1052 | nn = net_generic(net, nfsd_net_id); | |
1053 | spin_lock(&nn->s2s_cp_lock); | |
1054 | while (!list_empty(&stid->sc_cp_list)) { | |
1055 | cps = list_first_entry(&stid->sc_cp_list, | |
1056 | struct nfs4_cpntf_state, cp_list); | |
1057 | _free_cpntf_state_locked(nn, cps); | |
1058 | } | |
e0639dc5 OK |
1059 | spin_unlock(&nn->s2s_cp_lock); |
1060 | } | |
1061 | ||
b49e084d | 1062 | static struct nfs4_ol_stateid * nfs4_alloc_open_stateid(struct nfs4_client *clp) |
4cdc951b | 1063 | { |
6011695d | 1064 | struct nfs4_stid *stid; |
6011695d | 1065 | |
d19fb70d | 1066 | stid = nfs4_alloc_stid(clp, stateid_slab, nfs4_free_ol_stateid); |
6011695d TM |
1067 | if (!stid) |
1068 | return NULL; | |
1069 | ||
d19fb70d | 1070 | return openlockstateid(stid); |
6011695d TM |
1071 | } |
1072 | ||
1073 | static void nfs4_free_deleg(struct nfs4_stid *stid) | |
1074 | { | |
895ddf5e JL |
1075 | struct nfs4_delegation *dp = delegstateid(stid); |
1076 | ||
1077 | WARN_ON_ONCE(!list_empty(&stid->sc_cp_list)); | |
1078 | WARN_ON_ONCE(!list_empty(&dp->dl_perfile)); | |
1079 | WARN_ON_ONCE(!list_empty(&dp->dl_perclnt)); | |
1080 | WARN_ON_ONCE(!list_empty(&dp->dl_recall_lru)); | |
6011695d TM |
1081 | kmem_cache_free(deleg_slab, stid); |
1082 | atomic_long_dec(&num_delegations); | |
4cdc951b BF |
1083 | } |
1084 | ||
6282cd56 N |
1085 | /* |
1086 | * When we recall a delegation, we should be careful not to hand it | |
1087 | * out again straight away. | |
1088 | * To ensure this we keep a pair of bloom filters ('new' and 'old') | |
1089 | * in which the filehandles of recalled delegations are "stored". | |
1090 | * If a filehandle appear in either filter, a delegation is blocked. | |
1091 | * When a delegation is recalled, the filehandle is stored in the "new" | |
1092 | * filter. | |
1093 | * Every 30 seconds we swap the filters and clear the "new" one, | |
1094 | * unless both are empty of course. | |
1095 | * | |
1096 | * Each filter is 256 bits. We hash the filehandle to 32bit and use the | |
1097 | * low 3 bytes as hash-table indices. | |
1098 | * | |
f54fe962 | 1099 | * 'blocked_delegations_lock', which is always taken in block_delegations(), |
6282cd56 N |
1100 | * is used to manage concurrent access. Testing does not need the lock |
1101 | * except when swapping the two filters. | |
1102 | */ | |
f54fe962 | 1103 | static DEFINE_SPINLOCK(blocked_delegations_lock); |
6282cd56 N |
1104 | static struct bloom_pair { |
1105 | int entries, old_entries; | |
b3f255ef | 1106 | time64_t swap_time; |
6282cd56 N |
1107 | int new; /* index into 'set' */ |
1108 | DECLARE_BITMAP(set[2], 256); | |
1109 | } blocked_delegations; | |
1110 | ||
1111 | static int delegation_blocked(struct knfsd_fh *fh) | |
1112 | { | |
1113 | u32 hash; | |
1114 | struct bloom_pair *bd = &blocked_delegations; | |
1115 | ||
1116 | if (bd->entries == 0) | |
1117 | return 0; | |
b3f255ef | 1118 | if (ktime_get_seconds() - bd->swap_time > 30) { |
f54fe962 | 1119 | spin_lock(&blocked_delegations_lock); |
b3f255ef | 1120 | if (ktime_get_seconds() - bd->swap_time > 30) { |
6282cd56 N |
1121 | bd->entries -= bd->old_entries; |
1122 | bd->old_entries = bd->entries; | |
1123 | memset(bd->set[bd->new], 0, | |
1124 | sizeof(bd->set[0])); | |
1125 | bd->new = 1-bd->new; | |
b3f255ef | 1126 | bd->swap_time = ktime_get_seconds(); |
6282cd56 | 1127 | } |
f54fe962 | 1128 | spin_unlock(&blocked_delegations_lock); |
6282cd56 | 1129 | } |
d8b26071 | 1130 | hash = jhash(&fh->fh_raw, fh->fh_size, 0); |
6282cd56 N |
1131 | if (test_bit(hash&255, bd->set[0]) && |
1132 | test_bit((hash>>8)&255, bd->set[0]) && | |
1133 | test_bit((hash>>16)&255, bd->set[0])) | |
1134 | return 1; | |
1135 | ||
1136 | if (test_bit(hash&255, bd->set[1]) && | |
1137 | test_bit((hash>>8)&255, bd->set[1]) && | |
1138 | test_bit((hash>>16)&255, bd->set[1])) | |
1139 | return 1; | |
1140 | ||
1141 | return 0; | |
1142 | } | |
1143 | ||
1144 | static void block_delegations(struct knfsd_fh *fh) | |
1145 | { | |
1146 | u32 hash; | |
1147 | struct bloom_pair *bd = &blocked_delegations; | |
1148 | ||
d8b26071 | 1149 | hash = jhash(&fh->fh_raw, fh->fh_size, 0); |
6282cd56 | 1150 | |
f54fe962 | 1151 | spin_lock(&blocked_delegations_lock); |
6282cd56 N |
1152 | __set_bit(hash&255, bd->set[bd->new]); |
1153 | __set_bit((hash>>8)&255, bd->set[bd->new]); | |
1154 | __set_bit((hash>>16)&255, bd->set[bd->new]); | |
1155 | if (bd->entries == 0) | |
b3f255ef | 1156 | bd->swap_time = ktime_get_seconds(); |
6282cd56 | 1157 | bd->entries += 1; |
f54fe962 | 1158 | spin_unlock(&blocked_delegations_lock); |
6282cd56 N |
1159 | } |
1160 | ||
1da177e4 | 1161 | static struct nfs4_delegation * |
86d29b10 | 1162 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_file *fp, |
8287f009 | 1163 | struct nfs4_clnt_odstate *odstate) |
1da177e4 LT |
1164 | { |
1165 | struct nfs4_delegation *dp; | |
02a3508d | 1166 | long n; |
1da177e4 LT |
1167 | |
1168 | dprintk("NFSD alloc_init_deleg\n"); | |
02a3508d TM |
1169 | n = atomic_long_inc_return(&num_delegations); |
1170 | if (n < 0 || n > max_delegations) | |
1171 | goto out_dec; | |
bbf936ed | 1172 | if (delegation_blocked(&fp->fi_fhandle)) |
02a3508d | 1173 | goto out_dec; |
d19fb70d | 1174 | dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab, nfs4_free_deleg)); |
5b2d21c1 | 1175 | if (dp == NULL) |
02a3508d | 1176 | goto out_dec; |
6011695d | 1177 | |
2a74aba7 BF |
1178 | /* |
1179 | * delegation seqid's are never incremented. The 4.1 special | |
6136d2b4 BF |
1180 | * meaning of seqid 0 isn't meaningful, really, but let's avoid |
1181 | * 0 anyway just for consistency and use 1: | |
2a74aba7 BF |
1182 | */ |
1183 | dp->dl_stid.sc_stateid.si_generation = 1; | |
ea1da636 N |
1184 | INIT_LIST_HEAD(&dp->dl_perfile); |
1185 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 | 1186 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
8287f009 SB |
1187 | dp->dl_clnt_odstate = odstate; |
1188 | get_clnt_odstate(odstate); | |
99c41515 | 1189 | dp->dl_type = NFS4_OPEN_DELEGATE_READ; |
f0b5de1b | 1190 | dp->dl_retries = 1; |
66af2579 | 1191 | dp->dl_recalled = false; |
f0b5de1b | 1192 | nfsd4_init_cb(&dp->dl_recall, dp->dl_stid.sc_client, |
0162ac2b | 1193 | &nfsd4_cb_recall_ops, NFSPROC4_CLNT_CB_RECALL); |
86d29b10 BF |
1194 | get_nfs4_file(fp); |
1195 | dp->dl_stid.sc_file = fp; | |
1da177e4 | 1196 | return dp; |
02a3508d TM |
1197 | out_dec: |
1198 | atomic_long_dec(&num_delegations); | |
1199 | return NULL; | |
1da177e4 LT |
1200 | } |
1201 | ||
1202 | void | |
6011695d | 1203 | nfs4_put_stid(struct nfs4_stid *s) |
1da177e4 | 1204 | { |
11b9164a | 1205 | struct nfs4_file *fp = s->sc_file; |
6011695d TM |
1206 | struct nfs4_client *clp = s->sc_client; |
1207 | ||
4770d722 JL |
1208 | might_lock(&clp->cl_lock); |
1209 | ||
a15dfcd5 | 1210 | if (!refcount_dec_and_lock(&s->sc_count, &clp->cl_lock)) { |
b401be22 | 1211 | wake_up_all(&close_wq); |
6011695d | 1212 | return; |
b401be22 | 1213 | } |
6011695d | 1214 | idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id); |
624322f1 | 1215 | nfs4_free_cpntf_statelist(clp->net, s); |
4770d722 | 1216 | spin_unlock(&clp->cl_lock); |
6011695d | 1217 | s->sc_free(s); |
11b9164a TM |
1218 | if (fp) |
1219 | put_nfs4_file(fp); | |
1da177e4 LT |
1220 | } |
1221 | ||
9767feb2 JL |
1222 | void |
1223 | nfs4_inc_and_copy_stateid(stateid_t *dst, struct nfs4_stid *stid) | |
1224 | { | |
1225 | stateid_t *src = &stid->sc_stateid; | |
1226 | ||
1227 | spin_lock(&stid->sc_lock); | |
1228 | if (unlikely(++src->si_generation == 0)) | |
1229 | src->si_generation = 1; | |
1230 | memcpy(dst, src, sizeof(*dst)); | |
1231 | spin_unlock(&stid->sc_lock); | |
1232 | } | |
1233 | ||
353601e7 | 1234 | static void put_deleg_file(struct nfs4_file *fp) |
1da177e4 | 1235 | { |
eb82dd39 | 1236 | struct nfsd_file *nf = NULL; |
b8232d33 | 1237 | |
6bcc034e | 1238 | spin_lock(&fp->fi_lock); |
353601e7 | 1239 | if (--fp->fi_delegees == 0) |
eb82dd39 | 1240 | swap(nf, fp->fi_deleg_file); |
6bcc034e JL |
1241 | spin_unlock(&fp->fi_lock); |
1242 | ||
eb82dd39 JL |
1243 | if (nf) |
1244 | nfsd_file_put(nf); | |
353601e7 BF |
1245 | } |
1246 | ||
1247 | static void nfs4_unlock_deleg_lease(struct nfs4_delegation *dp) | |
1248 | { | |
1249 | struct nfs4_file *fp = dp->dl_stid.sc_file; | |
eb82dd39 | 1250 | struct nfsd_file *nf = fp->fi_deleg_file; |
353601e7 BF |
1251 | |
1252 | WARN_ON_ONCE(!fp->fi_delegees); | |
1253 | ||
eb82dd39 | 1254 | vfs_setlease(nf->nf_file, F_UNLCK, NULL, (void **)&dp); |
353601e7 | 1255 | put_deleg_file(fp); |
1da177e4 LT |
1256 | } |
1257 | ||
0af6e690 BF |
1258 | static void destroy_unhashed_deleg(struct nfs4_delegation *dp) |
1259 | { | |
1260 | put_clnt_odstate(dp->dl_clnt_odstate); | |
353601e7 | 1261 | nfs4_unlock_deleg_lease(dp); |
0af6e690 BF |
1262 | nfs4_put_stid(&dp->dl_stid); |
1263 | } | |
1264 | ||
cd61c522 | 1265 | void nfs4_unhash_stid(struct nfs4_stid *s) |
6136d2b4 | 1266 | { |
3abdb607 | 1267 | s->sc_type = 0; |
6136d2b4 BF |
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); |
931ee56c | 1317 | |
68b18f52 BF |
1318 | if (nfs4_delegation_exists(clp, fp)) |
1319 | return -EAGAIN; | |
a15dfcd5 | 1320 | refcount_inc(&dp->dl_stid.sc_count); |
3fb87d13 | 1321 | dp->dl_stid.sc_type = NFS4_DELEG_STID; |
931ee56c | 1322 | list_add(&dp->dl_perfile, &fp->fi_delegations); |
34ed9872 AE |
1323 | list_add(&dp->dl_perclnt, &clp->cl_delegations); |
1324 | return 0; | |
931ee56c BH |
1325 | } |
1326 | ||
548ec080 BF |
1327 | static bool delegation_hashed(struct nfs4_delegation *dp) |
1328 | { | |
1329 | return !(list_empty(&dp->dl_perfile)); | |
1330 | } | |
1331 | ||
3fcbbd24 | 1332 | static bool |
42690676 | 1333 | unhash_delegation_locked(struct nfs4_delegation *dp) |
1da177e4 | 1334 | { |
11b9164a | 1335 | struct nfs4_file *fp = dp->dl_stid.sc_file; |
02e1215f | 1336 | |
42690676 JL |
1337 | lockdep_assert_held(&state_lock); |
1338 | ||
548ec080 | 1339 | if (!delegation_hashed(dp)) |
3fcbbd24 JL |
1340 | return false; |
1341 | ||
b0fc29d6 | 1342 | dp->dl_stid.sc_type = NFS4_CLOSED_DELEG_STID; |
d55a166c JL |
1343 | /* Ensure that deleg break won't try to requeue it */ |
1344 | ++dp->dl_time; | |
417c6629 | 1345 | spin_lock(&fp->fi_lock); |
931ee56c | 1346 | list_del_init(&dp->dl_perclnt); |
1da177e4 | 1347 | list_del_init(&dp->dl_recall_lru); |
02e1215f JL |
1348 | list_del_init(&dp->dl_perfile); |
1349 | spin_unlock(&fp->fi_lock); | |
3fcbbd24 | 1350 | return true; |
3bd64a5b BF |
1351 | } |
1352 | ||
3bd64a5b BF |
1353 | static void destroy_delegation(struct nfs4_delegation *dp) |
1354 | { | |
3fcbbd24 JL |
1355 | bool unhashed; |
1356 | ||
42690676 | 1357 | spin_lock(&state_lock); |
3fcbbd24 | 1358 | unhashed = unhash_delegation_locked(dp); |
42690676 | 1359 | spin_unlock(&state_lock); |
0af6e690 BF |
1360 | if (unhashed) |
1361 | destroy_unhashed_deleg(dp); | |
3bd64a5b BF |
1362 | } |
1363 | ||
1364 | static void revoke_delegation(struct nfs4_delegation *dp) | |
1365 | { | |
1366 | struct nfs4_client *clp = dp->dl_stid.sc_client; | |
1367 | ||
2d4a532d JL |
1368 | WARN_ON(!list_empty(&dp->dl_recall_lru)); |
1369 | ||
a1c74569 CL |
1370 | trace_nfsd_stid_revoke(&dp->dl_stid); |
1371 | ||
0af6e690 | 1372 | if (clp->cl_minorversion) { |
3bd64a5b | 1373 | dp->dl_stid.sc_type = NFS4_REVOKED_DELEG_STID; |
0af6e690 | 1374 | refcount_inc(&dp->dl_stid.sc_count); |
2d4a532d JL |
1375 | spin_lock(&clp->cl_lock); |
1376 | list_add(&dp->dl_recall_lru, &clp->cl_revoked); | |
1377 | spin_unlock(&clp->cl_lock); | |
3bd64a5b | 1378 | } |
0af6e690 | 1379 | destroy_unhashed_deleg(dp); |
3bd64a5b BF |
1380 | } |
1381 | ||
1da177e4 LT |
1382 | /* |
1383 | * SETCLIENTID state | |
1384 | */ | |
1385 | ||
ddc04c41 BF |
1386 | static unsigned int clientid_hashval(u32 id) |
1387 | { | |
1388 | return id & CLIENT_HASH_MASK; | |
1389 | } | |
1390 | ||
6b189105 | 1391 | static unsigned int clientstr_hashval(struct xdr_netobj name) |
ddc04c41 | 1392 | { |
6b189105 | 1393 | return opaque_hashval(name.data, 8) & CLIENT_HASH_MASK; |
ddc04c41 BF |
1394 | } |
1395 | ||
baeb4ff0 JL |
1396 | /* |
1397 | * A stateid that had a deny mode associated with it is being released | |
1398 | * or downgraded. Recalculate the deny mode on the file. | |
1399 | */ | |
1400 | static void | |
1401 | recalculate_deny_mode(struct nfs4_file *fp) | |
1402 | { | |
1403 | struct nfs4_ol_stateid *stp; | |
1404 | ||
1405 | spin_lock(&fp->fi_lock); | |
1406 | fp->fi_share_deny = 0; | |
1407 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) | |
1408 | fp->fi_share_deny |= bmap_to_share_mode(stp->st_deny_bmap); | |
1409 | spin_unlock(&fp->fi_lock); | |
1410 | } | |
1411 | ||
1412 | static void | |
1413 | reset_union_bmap_deny(u32 deny, struct nfs4_ol_stateid *stp) | |
1414 | { | |
1415 | int i; | |
1416 | bool change = false; | |
1417 | ||
1418 | for (i = 1; i < 4; i++) { | |
1419 | if ((i & deny) != i) { | |
1420 | change = true; | |
1421 | clear_deny(i, stp); | |
1422 | } | |
1423 | } | |
1424 | ||
1425 | /* Recalculate per-file deny mode if there was a change */ | |
1426 | if (change) | |
11b9164a | 1427 | recalculate_deny_mode(stp->st_stid.sc_file); |
baeb4ff0 JL |
1428 | } |
1429 | ||
82c5ff1b JL |
1430 | /* release all access and file references for a given stateid */ |
1431 | static void | |
1432 | release_all_access(struct nfs4_ol_stateid *stp) | |
1433 | { | |
1434 | int i; | |
11b9164a | 1435 | struct nfs4_file *fp = stp->st_stid.sc_file; |
baeb4ff0 JL |
1436 | |
1437 | if (fp && stp->st_deny_bmap != 0) | |
1438 | recalculate_deny_mode(fp); | |
82c5ff1b JL |
1439 | |
1440 | for (i = 1; i < 4; i++) { | |
1441 | if (test_access(i, stp)) | |
11b9164a | 1442 | nfs4_file_put_access(stp->st_stid.sc_file, i); |
82c5ff1b JL |
1443 | clear_access(i, stp); |
1444 | } | |
1445 | } | |
1446 | ||
d50ffded KM |
1447 | static inline void nfs4_free_stateowner(struct nfs4_stateowner *sop) |
1448 | { | |
1449 | kfree(sop->so_owner.data); | |
1450 | sop->so_ops->so_free(sop); | |
1451 | } | |
1452 | ||
6b180f0b JL |
1453 | static void nfs4_put_stateowner(struct nfs4_stateowner *sop) |
1454 | { | |
a819ecc1 JL |
1455 | struct nfs4_client *clp = sop->so_client; |
1456 | ||
1457 | might_lock(&clp->cl_lock); | |
1458 | ||
1459 | if (!atomic_dec_and_lock(&sop->so_count, &clp->cl_lock)) | |
6b180f0b | 1460 | return; |
8f4b54c5 | 1461 | sop->so_ops->so_unhash(sop); |
a819ecc1 | 1462 | spin_unlock(&clp->cl_lock); |
d50ffded | 1463 | nfs4_free_stateowner(sop); |
6b180f0b JL |
1464 | } |
1465 | ||
a451b123 TM |
1466 | static bool |
1467 | nfs4_ol_stateid_unhashed(const struct nfs4_ol_stateid *stp) | |
1468 | { | |
1469 | return list_empty(&stp->st_perfile); | |
1470 | } | |
1471 | ||
e8568739 | 1472 | static bool unhash_ol_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 1473 | { |
11b9164a | 1474 | struct nfs4_file *fp = stp->st_stid.sc_file; |
1d31a253 | 1475 | |
1c755dc1 JL |
1476 | lockdep_assert_held(&stp->st_stateowner->so_client->cl_lock); |
1477 | ||
e8568739 JL |
1478 | if (list_empty(&stp->st_perfile)) |
1479 | return false; | |
1480 | ||
1d31a253 | 1481 | spin_lock(&fp->fi_lock); |
e8568739 | 1482 | list_del_init(&stp->st_perfile); |
1d31a253 | 1483 | spin_unlock(&fp->fi_lock); |
529d7b2a | 1484 | list_del(&stp->st_perstateowner); |
e8568739 | 1485 | return true; |
529d7b2a BF |
1486 | } |
1487 | ||
6011695d | 1488 | static void nfs4_free_ol_stateid(struct nfs4_stid *stid) |
529d7b2a | 1489 | { |
6011695d | 1490 | struct nfs4_ol_stateid *stp = openlockstateid(stid); |
4665e2ba | 1491 | |
8287f009 | 1492 | put_clnt_odstate(stp->st_clnt_odstate); |
6011695d | 1493 | release_all_access(stp); |
d3134b10 JL |
1494 | if (stp->st_stateowner) |
1495 | nfs4_put_stateowner(stp->st_stateowner); | |
019805fe | 1496 | WARN_ON(!list_empty(&stid->sc_cp_list)); |
6011695d | 1497 | kmem_cache_free(stateid_slab, stid); |
529d7b2a BF |
1498 | } |
1499 | ||
b49e084d | 1500 | static void nfs4_free_lock_stateid(struct nfs4_stid *stid) |
529d7b2a | 1501 | { |
b49e084d JL |
1502 | struct nfs4_ol_stateid *stp = openlockstateid(stid); |
1503 | struct nfs4_lockowner *lo = lockowner(stp->st_stateowner); | |
eb82dd39 | 1504 | struct nfsd_file *nf; |
529d7b2a | 1505 | |
eb82dd39 JL |
1506 | nf = find_any_file(stp->st_stid.sc_file); |
1507 | if (nf) { | |
1508 | get_file(nf->nf_file); | |
1509 | filp_close(nf->nf_file, (fl_owner_t)lo); | |
1510 | nfsd_file_put(nf); | |
1511 | } | |
b49e084d JL |
1512 | nfs4_free_ol_stateid(stid); |
1513 | } | |
1514 | ||
2c41beb0 JL |
1515 | /* |
1516 | * Put the persistent reference to an already unhashed generic stateid, while | |
1517 | * holding the cl_lock. If it's the last reference, then put it onto the | |
1518 | * reaplist for later destruction. | |
1519 | */ | |
1520 | static void put_ol_stateid_locked(struct nfs4_ol_stateid *stp, | |
1521 | struct list_head *reaplist) | |
1522 | { | |
1523 | struct nfs4_stid *s = &stp->st_stid; | |
1524 | struct nfs4_client *clp = s->sc_client; | |
1525 | ||
1526 | lockdep_assert_held(&clp->cl_lock); | |
1527 | ||
1528 | WARN_ON_ONCE(!list_empty(&stp->st_locks)); | |
1529 | ||
a15dfcd5 | 1530 | if (!refcount_dec_and_test(&s->sc_count)) { |
2c41beb0 JL |
1531 | wake_up_all(&close_wq); |
1532 | return; | |
1533 | } | |
1534 | ||
1535 | idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id); | |
1536 | list_add(&stp->st_locks, reaplist); | |
1537 | } | |
1538 | ||
e8568739 | 1539 | static bool unhash_lock_stateid(struct nfs4_ol_stateid *stp) |
b49e084d | 1540 | { |
f46c445b | 1541 | lockdep_assert_held(&stp->st_stid.sc_client->cl_lock); |
3c1c995c | 1542 | |
a451b123 TM |
1543 | if (!unhash_ol_stateid(stp)) |
1544 | return false; | |
3c1c995c | 1545 | list_del_init(&stp->st_locks); |
cd61c522 | 1546 | nfs4_unhash_stid(&stp->st_stid); |
a451b123 | 1547 | return true; |
3c1c995c JL |
1548 | } |
1549 | ||
1550 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) | |
1551 | { | |
f46c445b | 1552 | struct nfs4_client *clp = stp->st_stid.sc_client; |
e8568739 | 1553 | bool unhashed; |
3c1c995c | 1554 | |
f46c445b | 1555 | spin_lock(&clp->cl_lock); |
e8568739 | 1556 | unhashed = unhash_lock_stateid(stp); |
f46c445b | 1557 | spin_unlock(&clp->cl_lock); |
e8568739 JL |
1558 | if (unhashed) |
1559 | nfs4_put_stid(&stp->st_stid); | |
529d7b2a BF |
1560 | } |
1561 | ||
c58c6610 | 1562 | static void unhash_lockowner_locked(struct nfs4_lockowner *lo) |
8f4b54c5 | 1563 | { |
d4f0489f | 1564 | struct nfs4_client *clp = lo->lo_owner.so_client; |
c58c6610 | 1565 | |
d4f0489f | 1566 | lockdep_assert_held(&clp->cl_lock); |
c58c6610 | 1567 | |
8f4b54c5 JL |
1568 | list_del_init(&lo->lo_owner.so_strhash); |
1569 | } | |
1570 | ||
2c41beb0 JL |
1571 | /* |
1572 | * Free a list of generic stateids that were collected earlier after being | |
1573 | * fully unhashed. | |
1574 | */ | |
1575 | static void | |
1576 | free_ol_stateid_reaplist(struct list_head *reaplist) | |
1577 | { | |
1578 | struct nfs4_ol_stateid *stp; | |
fb94d766 | 1579 | struct nfs4_file *fp; |
2c41beb0 JL |
1580 | |
1581 | might_sleep(); | |
1582 | ||
1583 | while (!list_empty(reaplist)) { | |
1584 | stp = list_first_entry(reaplist, struct nfs4_ol_stateid, | |
1585 | st_locks); | |
1586 | list_del(&stp->st_locks); | |
fb94d766 | 1587 | fp = stp->st_stid.sc_file; |
2c41beb0 | 1588 | stp->st_stid.sc_free(&stp->st_stid); |
fb94d766 KM |
1589 | if (fp) |
1590 | put_nfs4_file(fp); | |
2c41beb0 JL |
1591 | } |
1592 | } | |
1593 | ||
d83017f9 JL |
1594 | static void release_open_stateid_locks(struct nfs4_ol_stateid *open_stp, |
1595 | struct list_head *reaplist) | |
3c87b9b7 TM |
1596 | { |
1597 | struct nfs4_ol_stateid *stp; | |
1598 | ||
e8568739 JL |
1599 | lockdep_assert_held(&open_stp->st_stid.sc_client->cl_lock); |
1600 | ||
3c87b9b7 TM |
1601 | while (!list_empty(&open_stp->st_locks)) { |
1602 | stp = list_entry(open_stp->st_locks.next, | |
1603 | struct nfs4_ol_stateid, st_locks); | |
e8568739 | 1604 | WARN_ON(!unhash_lock_stateid(stp)); |
d83017f9 | 1605 | put_ol_stateid_locked(stp, reaplist); |
529d7b2a BF |
1606 | } |
1607 | } | |
1608 | ||
e8568739 | 1609 | static bool unhash_open_stateid(struct nfs4_ol_stateid *stp, |
d83017f9 | 1610 | struct list_head *reaplist) |
2283963f | 1611 | { |
2c41beb0 JL |
1612 | lockdep_assert_held(&stp->st_stid.sc_client->cl_lock); |
1613 | ||
a451b123 TM |
1614 | if (!unhash_ol_stateid(stp)) |
1615 | return false; | |
d83017f9 | 1616 | release_open_stateid_locks(stp, reaplist); |
a451b123 | 1617 | return true; |
38c387b5 BF |
1618 | } |
1619 | ||
1620 | static void release_open_stateid(struct nfs4_ol_stateid *stp) | |
1621 | { | |
2c41beb0 JL |
1622 | LIST_HEAD(reaplist); |
1623 | ||
1624 | spin_lock(&stp->st_stid.sc_client->cl_lock); | |
e8568739 JL |
1625 | if (unhash_open_stateid(stp, &reaplist)) |
1626 | put_ol_stateid_locked(stp, &reaplist); | |
2c41beb0 JL |
1627 | spin_unlock(&stp->st_stid.sc_client->cl_lock); |
1628 | free_ol_stateid_reaplist(&reaplist); | |
2283963f BF |
1629 | } |
1630 | ||
7ffb5880 | 1631 | static void unhash_openowner_locked(struct nfs4_openowner *oo) |
f1d110ca | 1632 | { |
d4f0489f | 1633 | struct nfs4_client *clp = oo->oo_owner.so_client; |
7ffb5880 | 1634 | |
d4f0489f | 1635 | lockdep_assert_held(&clp->cl_lock); |
7ffb5880 | 1636 | |
8f4b54c5 JL |
1637 | list_del_init(&oo->oo_owner.so_strhash); |
1638 | list_del_init(&oo->oo_perclient); | |
f1d110ca BF |
1639 | } |
1640 | ||
f7a4d872 BF |
1641 | static void release_last_closed_stateid(struct nfs4_openowner *oo) |
1642 | { | |
217526e7 JL |
1643 | struct nfsd_net *nn = net_generic(oo->oo_owner.so_client->net, |
1644 | nfsd_net_id); | |
1645 | struct nfs4_ol_stateid *s; | |
f7a4d872 | 1646 | |
217526e7 JL |
1647 | spin_lock(&nn->client_lock); |
1648 | s = oo->oo_last_closed_stid; | |
f7a4d872 | 1649 | if (s) { |
d3134b10 | 1650 | list_del_init(&oo->oo_close_lru); |
f7a4d872 BF |
1651 | oo->oo_last_closed_stid = NULL; |
1652 | } | |
217526e7 JL |
1653 | spin_unlock(&nn->client_lock); |
1654 | if (s) | |
1655 | nfs4_put_stid(&s->st_stid); | |
f7a4d872 BF |
1656 | } |
1657 | ||
2c41beb0 | 1658 | static void release_openowner(struct nfs4_openowner *oo) |
8f4b54c5 JL |
1659 | { |
1660 | struct nfs4_ol_stateid *stp; | |
d4f0489f | 1661 | struct nfs4_client *clp = oo->oo_owner.so_client; |
2c41beb0 | 1662 | struct list_head reaplist; |
7ffb5880 | 1663 | |
2c41beb0 | 1664 | INIT_LIST_HEAD(&reaplist); |
8f4b54c5 | 1665 | |
2c41beb0 JL |
1666 | spin_lock(&clp->cl_lock); |
1667 | unhash_openowner_locked(oo); | |
8f4b54c5 JL |
1668 | while (!list_empty(&oo->oo_owner.so_stateids)) { |
1669 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
1670 | struct nfs4_ol_stateid, st_perstateowner); | |
e8568739 JL |
1671 | if (unhash_open_stateid(stp, &reaplist)) |
1672 | put_ol_stateid_locked(stp, &reaplist); | |
8f4b54c5 | 1673 | } |
d4f0489f | 1674 | spin_unlock(&clp->cl_lock); |
2c41beb0 | 1675 | free_ol_stateid_reaplist(&reaplist); |
f7a4d872 | 1676 | release_last_closed_stateid(oo); |
6b180f0b | 1677 | nfs4_put_stateowner(&oo->oo_owner); |
f1d110ca BF |
1678 | } |
1679 | ||
5282fd72 ME |
1680 | static inline int |
1681 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
1682 | { | |
1683 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
1684 | ||
1685 | return sid->sequence % SESSION_HASH_SIZE; | |
1686 | } | |
1687 | ||
135dd002 | 1688 | #ifdef CONFIG_SUNRPC_DEBUG |
5282fd72 ME |
1689 | static inline void |
1690 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
1691 | { | |
1692 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
1693 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
1694 | } | |
8f199b82 TM |
1695 | #else |
1696 | static inline void | |
1697 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
1698 | { | |
1699 | } | |
1700 | #endif | |
1701 | ||
9411b1d4 BF |
1702 | /* |
1703 | * Bump the seqid on cstate->replay_owner, and clear replay_owner if it | |
1704 | * won't be used for replay. | |
1705 | */ | |
1706 | void nfsd4_bump_seqid(struct nfsd4_compound_state *cstate, __be32 nfserr) | |
1707 | { | |
1708 | struct nfs4_stateowner *so = cstate->replay_owner; | |
1709 | ||
1710 | if (nfserr == nfserr_replay_me) | |
1711 | return; | |
1712 | ||
1713 | if (!seqid_mutating_err(ntohl(nfserr))) { | |
58fb12e6 | 1714 | nfsd4_cstate_clear_replay(cstate); |
9411b1d4 BF |
1715 | return; |
1716 | } | |
1717 | if (!so) | |
1718 | return; | |
1719 | if (so->so_is_open_owner) | |
1720 | release_last_closed_stateid(openowner(so)); | |
1721 | so->so_seqid++; | |
1722 | return; | |
1723 | } | |
5282fd72 | 1724 | |
ec6b5d7b AA |
1725 | static void |
1726 | gen_sessionid(struct nfsd4_session *ses) | |
1727 | { | |
1728 | struct nfs4_client *clp = ses->se_client; | |
1729 | struct nfsd4_sessionid *sid; | |
1730 | ||
1731 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
1732 | sid->clientid = clp->cl_clientid; | |
1733 | sid->sequence = current_sessionid++; | |
1734 | sid->reserved = 0; | |
1735 | } | |
1736 | ||
1737 | /* | |
a649637c AA |
1738 | * The protocol defines ca_maxresponssize_cached to include the size of |
1739 | * the rpc header, but all we need to cache is the data starting after | |
1740 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
1741 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
1742 | * value that is the number of bytes in our cache plus a few additional | |
1743 | * bytes. In order to stay on the safe side, and not promise more than | |
1744 | * we can cache, those additional bytes must be the minimum possible: 24 | |
1745 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
1746 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
1747 | * for the SEQUENCE op response: | |
1748 | */ | |
1749 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
1750 | ||
557ce264 AA |
1751 | static void |
1752 | free_session_slots(struct nfsd4_session *ses) | |
1753 | { | |
1754 | int i; | |
1755 | ||
53da6a53 BF |
1756 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) { |
1757 | free_svc_cred(&ses->se_slots[i]->sl_cred); | |
557ce264 | 1758 | kfree(ses->se_slots[i]); |
53da6a53 | 1759 | } |
557ce264 AA |
1760 | } |
1761 | ||
a649637c | 1762 | /* |
efe0cb6d BF |
1763 | * We don't actually need to cache the rpc and session headers, so we |
1764 | * can allocate a little less for each slot: | |
1765 | */ | |
55c760cf | 1766 | static inline u32 slot_bytes(struct nfsd4_channel_attrs *ca) |
efe0cb6d | 1767 | { |
55c760cf | 1768 | u32 size; |
efe0cb6d | 1769 | |
55c760cf BF |
1770 | if (ca->maxresp_cached < NFSD_MIN_HDR_SEQ_SZ) |
1771 | size = 0; | |
1772 | else | |
1773 | size = ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
1774 | return size + sizeof(struct nfsd4_slot); | |
5b6feee9 | 1775 | } |
ec6b5d7b | 1776 | |
5b6feee9 BF |
1777 | /* |
1778 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c | 1779 | * re-negotiate active sessions and reduce their slot usage to make |
42b2aa86 | 1780 | * room for new connections. For now we just fail the create session. |
ec6b5d7b | 1781 | */ |
2030ca56 | 1782 | static u32 nfsd4_get_drc_mem(struct nfsd4_channel_attrs *ca, struct nfsd_net *nn) |
ec6b5d7b | 1783 | { |
55c760cf BF |
1784 | u32 slotsize = slot_bytes(ca); |
1785 | u32 num = ca->maxreqs; | |
c54f24e3 | 1786 | unsigned long avail, total_avail; |
2030ca56 | 1787 | unsigned int scale_factor; |
ec6b5d7b | 1788 | |
5b6feee9 | 1789 | spin_lock(&nfsd_drc_lock); |
7f49fd5d N |
1790 | if (nfsd_drc_max_mem > nfsd_drc_mem_used) |
1791 | total_avail = nfsd_drc_max_mem - nfsd_drc_mem_used; | |
1792 | else | |
1793 | /* We have handed out more space than we chose in | |
1794 | * set_max_drc() to allow. That isn't really a | |
1795 | * problem as long as that doesn't make us think we | |
1796 | * have lots more due to integer overflow. | |
1797 | */ | |
1798 | total_avail = 0; | |
c54f24e3 | 1799 | avail = min((unsigned long)NFSD_MAX_MEM_PER_SESSION, total_avail); |
de766e57 | 1800 | /* |
2030ca56 | 1801 | * Never use more than a fraction of the remaining memory, |
7f49fd5d | 1802 | * unless it's the only way to give this client a slot. |
2030ca56 N |
1803 | * The chosen fraction is either 1/8 or 1/number of threads, |
1804 | * whichever is smaller. This ensures there are adequate | |
1805 | * slots to support multiple clients per thread. | |
7f49fd5d N |
1806 | * Give the client one slot even if that would require |
1807 | * over-allocation--it is better than failure. | |
de766e57 | 1808 | */ |
2030ca56 N |
1809 | scale_factor = max_t(unsigned int, 8, nn->nfsd_serv->sv_nrthreads); |
1810 | ||
1811 | avail = clamp_t(unsigned long, avail, slotsize, | |
1812 | total_avail/scale_factor); | |
5b6feee9 | 1813 | num = min_t(int, num, avail / slotsize); |
7f49fd5d | 1814 | num = max_t(int, num, 1); |
5b6feee9 BF |
1815 | nfsd_drc_mem_used += num * slotsize; |
1816 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 1817 | |
5b6feee9 BF |
1818 | return num; |
1819 | } | |
ec6b5d7b | 1820 | |
55c760cf | 1821 | static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs *ca) |
5b6feee9 | 1822 | { |
55c760cf BF |
1823 | int slotsize = slot_bytes(ca); |
1824 | ||
4bd9b0f4 | 1825 | spin_lock(&nfsd_drc_lock); |
55c760cf | 1826 | nfsd_drc_mem_used -= slotsize * ca->maxreqs; |
4bd9b0f4 | 1827 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 1828 | } |
ec6b5d7b | 1829 | |
60810e54 KM |
1830 | static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fattrs, |
1831 | struct nfsd4_channel_attrs *battrs) | |
5b6feee9 | 1832 | { |
60810e54 KM |
1833 | int numslots = fattrs->maxreqs; |
1834 | int slotsize = slot_bytes(fattrs); | |
5b6feee9 | 1835 | struct nfsd4_session *new; |
85a0d0c9 | 1836 | int i; |
a649637c | 1837 | |
85a0d0c9 XJ |
1838 | BUILD_BUG_ON(struct_size(new, se_slots, NFSD_MAX_SLOTS_PER_SESSION) |
1839 | > PAGE_SIZE); | |
ec6b5d7b | 1840 | |
85a0d0c9 | 1841 | new = kzalloc(struct_size(new, se_slots, numslots), GFP_KERNEL); |
5b6feee9 BF |
1842 | if (!new) |
1843 | return NULL; | |
557ce264 | 1844 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 | 1845 | for (i = 0; i < numslots; i++) { |
55c760cf | 1846 | new->se_slots[i] = kzalloc(slotsize, GFP_KERNEL); |
5b6feee9 | 1847 | if (!new->se_slots[i]) |
557ce264 | 1848 | goto out_free; |
557ce264 | 1849 | } |
60810e54 KM |
1850 | |
1851 | memcpy(&new->se_fchannel, fattrs, sizeof(struct nfsd4_channel_attrs)); | |
1852 | memcpy(&new->se_bchannel, battrs, sizeof(struct nfsd4_channel_attrs)); | |
1853 | ||
5b6feee9 BF |
1854 | return new; |
1855 | out_free: | |
1856 | while (i--) | |
1857 | kfree(new->se_slots[i]); | |
1858 | kfree(new); | |
1859 | return NULL; | |
ec6b5d7b AA |
1860 | } |
1861 | ||
19cf5c02 BF |
1862 | static void free_conn(struct nfsd4_conn *c) |
1863 | { | |
1864 | svc_xprt_put(c->cn_xprt); | |
1865 | kfree(c); | |
1866 | } | |
ec6b5d7b | 1867 | |
19cf5c02 BF |
1868 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
1869 | { | |
1870 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
1871 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 1872 | |
806d65b6 CL |
1873 | trace_nfsd_cb_lost(clp); |
1874 | ||
19cf5c02 BF |
1875 | spin_lock(&clp->cl_lock); |
1876 | if (!list_empty(&c->cn_persession)) { | |
1877 | list_del(&c->cn_persession); | |
1878 | free_conn(c); | |
1879 | } | |
eea49806 | 1880 | nfsd4_probe_callback(clp); |
2e4b7239 | 1881 | spin_unlock(&clp->cl_lock); |
19cf5c02 | 1882 | } |
ec6b5d7b | 1883 | |
d29c374c | 1884 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 1885 | { |
c7662518 | 1886 | struct nfsd4_conn *conn; |
ec6b5d7b | 1887 | |
c7662518 BF |
1888 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
1889 | if (!conn) | |
db90681d | 1890 | return NULL; |
c7662518 BF |
1891 | svc_xprt_get(rqstp->rq_xprt); |
1892 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 1893 | conn->cn_flags = flags; |
db90681d BF |
1894 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
1895 | return conn; | |
1896 | } | |
a649637c | 1897 | |
328ead28 BF |
1898 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
1899 | { | |
1900 | conn->cn_session = ses; | |
1901 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
1902 | } |
1903 | ||
db90681d | 1904 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 1905 | { |
db90681d | 1906 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 1907 | |
c7662518 | 1908 | spin_lock(&clp->cl_lock); |
328ead28 | 1909 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 1910 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
1911 | } |
1912 | ||
21b75b01 | 1913 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 1914 | { |
19cf5c02 | 1915 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 1916 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
1917 | } |
1918 | ||
e1ff371f | 1919 | static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses) |
ec6b5d7b | 1920 | { |
21b75b01 | 1921 | int ret; |
ec6b5d7b | 1922 | |
db90681d | 1923 | nfsd4_hash_conn(conn, ses); |
21b75b01 BF |
1924 | ret = nfsd4_register_conn(conn); |
1925 | if (ret) | |
1926 | /* oops; xprt is already down: */ | |
1927 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
57a37144 BF |
1928 | /* We may have gained or lost a callback channel: */ |
1929 | nfsd4_probe_callback_sync(ses->se_client); | |
c7662518 | 1930 | } |
ec6b5d7b | 1931 | |
e1ff371f | 1932 | static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses) |
1d1bc8f2 BF |
1933 | { |
1934 | u32 dir = NFS4_CDFC4_FORE; | |
1935 | ||
e1ff371f | 1936 | if (cses->flags & SESSION4_BACK_CHAN) |
1d1bc8f2 | 1937 | dir |= NFS4_CDFC4_BACK; |
e1ff371f | 1938 | return alloc_conn(rqstp, dir); |
1d1bc8f2 BF |
1939 | } |
1940 | ||
1941 | /* must be called under client_lock */ | |
19cf5c02 | 1942 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 1943 | { |
19cf5c02 BF |
1944 | struct nfs4_client *clp = s->se_client; |
1945 | struct nfsd4_conn *c; | |
ec6b5d7b | 1946 | |
19cf5c02 BF |
1947 | spin_lock(&clp->cl_lock); |
1948 | while (!list_empty(&s->se_conns)) { | |
1949 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
1950 | list_del_init(&c->cn_persession); | |
1951 | spin_unlock(&clp->cl_lock); | |
557ce264 | 1952 | |
19cf5c02 BF |
1953 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
1954 | free_conn(c); | |
ec6b5d7b | 1955 | |
19cf5c02 BF |
1956 | spin_lock(&clp->cl_lock); |
1957 | } | |
1958 | spin_unlock(&clp->cl_lock); | |
c7662518 | 1959 | } |
ec6b5d7b | 1960 | |
1377b69e BF |
1961 | static void __free_session(struct nfsd4_session *ses) |
1962 | { | |
1377b69e BF |
1963 | free_session_slots(ses); |
1964 | kfree(ses); | |
1965 | } | |
1966 | ||
66b2b9b2 | 1967 | static void free_session(struct nfsd4_session *ses) |
c7662518 | 1968 | { |
19cf5c02 | 1969 | nfsd4_del_conns(ses); |
55c760cf | 1970 | nfsd4_put_drc_mem(&ses->se_fchannel); |
1377b69e | 1971 | __free_session(ses); |
c7662518 BF |
1972 | } |
1973 | ||
135ae827 | 1974 | static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
a827bcb2 | 1975 | { |
a827bcb2 | 1976 | int idx; |
1872de0e | 1977 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
a827bcb2 | 1978 | |
ec6b5d7b AA |
1979 | new->se_client = clp; |
1980 | gen_sessionid(new); | |
ec6b5d7b | 1981 | |
c7662518 BF |
1982 | INIT_LIST_HEAD(&new->se_conns); |
1983 | ||
ac7c46f2 | 1984 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 1985 | new->se_flags = cses->flags; |
8b5ce5cd | 1986 | new->se_cb_prog = cses->callback_prog; |
c6bb3ca2 | 1987 | new->se_cb_sec = cses->cb_sec; |
66b2b9b2 | 1988 | atomic_set(&new->se_ref, 0); |
5b6feee9 | 1989 | idx = hash_sessionid(&new->se_sessionid); |
1872de0e | 1990 | list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]); |
4c649378 | 1991 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 1992 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 1993 | spin_unlock(&clp->cl_lock); |
60810e54 | 1994 | |
b0d2e42c | 1995 | { |
edd76786 | 1996 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
1997 | /* |
1998 | * This is a little silly; with sessions there's no real | |
1999 | * use for the callback address. Use the peer address | |
2000 | * as a reasonable default for now, but consider fixing | |
2001 | * the rpc client not to require an address in the | |
2002 | * future: | |
2003 | */ | |
edd76786 BF |
2004 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
2005 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 2006 | } |
ec6b5d7b AA |
2007 | } |
2008 | ||
9089f1b4 | 2009 | /* caller must hold client_lock */ |
5282fd72 | 2010 | static struct nfsd4_session * |
d4e19e70 | 2011 | __find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net) |
5282fd72 ME |
2012 | { |
2013 | struct nfsd4_session *elem; | |
2014 | int idx; | |
1872de0e | 2015 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
5282fd72 | 2016 | |
0a880a28 TM |
2017 | lockdep_assert_held(&nn->client_lock); |
2018 | ||
5282fd72 ME |
2019 | dump_sessionid(__func__, sessionid); |
2020 | idx = hash_sessionid(sessionid); | |
5282fd72 | 2021 | /* Search in the appropriate list */ |
1872de0e | 2022 | list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) { |
5282fd72 ME |
2023 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
2024 | NFS4_MAX_SESSIONID_LEN)) { | |
2025 | return elem; | |
2026 | } | |
2027 | } | |
2028 | ||
2029 | dprintk("%s: session not found\n", __func__); | |
2030 | return NULL; | |
2031 | } | |
2032 | ||
d4e19e70 TM |
2033 | static struct nfsd4_session * |
2034 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net, | |
2035 | __be32 *ret) | |
2036 | { | |
2037 | struct nfsd4_session *session; | |
2038 | __be32 status = nfserr_badsession; | |
2039 | ||
2040 | session = __find_in_sessionid_hashtbl(sessionid, net); | |
2041 | if (!session) | |
2042 | goto out; | |
2043 | status = nfsd4_get_session_locked(session); | |
2044 | if (status) | |
2045 | session = NULL; | |
2046 | out: | |
2047 | *ret = status; | |
2048 | return session; | |
2049 | } | |
2050 | ||
9089f1b4 | 2051 | /* caller must hold client_lock */ |
7116ed6b | 2052 | static void |
5282fd72 | 2053 | unhash_session(struct nfsd4_session *ses) |
7116ed6b | 2054 | { |
0a880a28 TM |
2055 | struct nfs4_client *clp = ses->se_client; |
2056 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
2057 | ||
2058 | lockdep_assert_held(&nn->client_lock); | |
2059 | ||
7116ed6b | 2060 | list_del(&ses->se_hash); |
4c649378 | 2061 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 2062 | list_del(&ses->se_perclnt); |
4c649378 | 2063 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
2064 | } |
2065 | ||
1da177e4 LT |
2066 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
2067 | static int | |
2c142baa | 2068 | STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn) |
1da177e4 | 2069 | { |
bbc7f33a BF |
2070 | /* |
2071 | * We're assuming the clid was not given out from a boot | |
2072 | * precisely 2^32 (about 136 years) before this one. That seems | |
2073 | * a safe assumption: | |
2074 | */ | |
2075 | if (clid->cl_boot == (u32)nn->boot_time) | |
1da177e4 | 2076 | return 0; |
dd5e3fbc | 2077 | trace_nfsd_clid_stale(clid); |
1da177e4 LT |
2078 | return 1; |
2079 | } | |
2080 | ||
2081 | /* | |
2082 | * XXX Should we use a slab cache ? | |
2083 | * This type of memory management is somewhat inefficient, but we use it | |
2084 | * anyway since SETCLIENTID is not a common operation. | |
2085 | */ | |
0926c395 DN |
2086 | static struct nfs4_client *alloc_client(struct xdr_netobj name, |
2087 | struct nfsd_net *nn) | |
1da177e4 LT |
2088 | { |
2089 | struct nfs4_client *clp; | |
d4f0489f | 2090 | int i; |
1da177e4 | 2091 | |
4271c2c0 DN |
2092 | if (atomic_read(&nn->nfs4_client_count) >= nn->nfs4_max_clients) { |
2093 | mod_delayed_work(laundry_wq, &nn->laundromat_work, 0); | |
2094 | return NULL; | |
2095 | } | |
9258a2d5 | 2096 | clp = kmem_cache_zalloc(client_slab, GFP_KERNEL); |
35bba9a3 BF |
2097 | if (clp == NULL) |
2098 | return NULL; | |
6f4859b8 | 2099 | xdr_netobj_dup(&clp->cl_name, &name, GFP_KERNEL); |
d4f0489f TM |
2100 | if (clp->cl_name.data == NULL) |
2101 | goto err_no_name; | |
6da2ec56 KC |
2102 | clp->cl_ownerstr_hashtbl = kmalloc_array(OWNER_HASH_SIZE, |
2103 | sizeof(struct list_head), | |
2104 | GFP_KERNEL); | |
d4f0489f TM |
2105 | if (!clp->cl_ownerstr_hashtbl) |
2106 | goto err_no_hashtbl; | |
2107 | for (i = 0; i < OWNER_HASH_SIZE; i++) | |
2108 | INIT_LIST_HEAD(&clp->cl_ownerstr_hashtbl[i]); | |
5694c93e TM |
2109 | INIT_LIST_HEAD(&clp->cl_sessions); |
2110 | idr_init(&clp->cl_stateids); | |
14ed14cc | 2111 | atomic_set(&clp->cl_rpc_users, 0); |
5694c93e | 2112 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; |
66af2579 | 2113 | clp->cl_state = NFSD4_ACTIVE; |
0926c395 | 2114 | atomic_inc(&nn->nfs4_client_count); |
66af2579 | 2115 | atomic_set(&clp->cl_delegs_in_recall, 0); |
5694c93e TM |
2116 | INIT_LIST_HEAD(&clp->cl_idhash); |
2117 | INIT_LIST_HEAD(&clp->cl_openowners); | |
2118 | INIT_LIST_HEAD(&clp->cl_delegations); | |
2119 | INIT_LIST_HEAD(&clp->cl_lru); | |
5694c93e | 2120 | INIT_LIST_HEAD(&clp->cl_revoked); |
9cf514cc CH |
2121 | #ifdef CONFIG_NFSD_PNFS |
2122 | INIT_LIST_HEAD(&clp->cl_lo_states); | |
2123 | #endif | |
e0639dc5 OK |
2124 | INIT_LIST_HEAD(&clp->async_copies); |
2125 | spin_lock_init(&clp->async_lock); | |
5694c93e TM |
2126 | spin_lock_init(&clp->cl_lock); |
2127 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1da177e4 | 2128 | return clp; |
d4f0489f TM |
2129 | err_no_hashtbl: |
2130 | kfree(clp->cl_name.data); | |
2131 | err_no_name: | |
9258a2d5 | 2132 | kmem_cache_free(client_slab, clp); |
d4f0489f | 2133 | return NULL; |
1da177e4 LT |
2134 | } |
2135 | ||
59f8e91b BF |
2136 | static void __free_client(struct kref *k) |
2137 | { | |
e8a79fb1 BF |
2138 | struct nfsdfs_client *c = container_of(k, struct nfsdfs_client, cl_ref); |
2139 | struct nfs4_client *clp = container_of(c, struct nfs4_client, cl_nfsdfs); | |
59f8e91b BF |
2140 | |
2141 | free_svc_cred(&clp->cl_cred); | |
2142 | kfree(clp->cl_ownerstr_hashtbl); | |
2143 | kfree(clp->cl_name.data); | |
79123444 BF |
2144 | kfree(clp->cl_nii_domain.data); |
2145 | kfree(clp->cl_nii_name.data); | |
59f8e91b | 2146 | idr_destroy(&clp->cl_stateids); |
44df6f43 | 2147 | kfree(clp->cl_ra); |
59f8e91b BF |
2148 | kmem_cache_free(client_slab, clp); |
2149 | } | |
2150 | ||
297e57a2 | 2151 | static void drop_client(struct nfs4_client *clp) |
59f8e91b | 2152 | { |
e8a79fb1 | 2153 | kref_put(&clp->cl_nfsdfs.cl_ref, __free_client); |
59f8e91b BF |
2154 | } |
2155 | ||
4dd86e15 | 2156 | static void |
1da177e4 LT |
2157 | free_client(struct nfs4_client *clp) |
2158 | { | |
792c95dd BF |
2159 | while (!list_empty(&clp->cl_sessions)) { |
2160 | struct nfsd4_session *ses; | |
2161 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
2162 | se_perclnt); | |
2163 | list_del(&ses->se_perclnt); | |
66b2b9b2 BF |
2164 | WARN_ON_ONCE(atomic_read(&ses->se_ref)); |
2165 | free_session(ses); | |
792c95dd | 2166 | } |
4cb57e30 | 2167 | rpc_destroy_wait_queue(&clp->cl_cb_waitq); |
89c905be | 2168 | if (clp->cl_nfsd_dentry) { |
e8a79fb1 | 2169 | nfsd_client_rmdir(clp->cl_nfsd_dentry); |
89c905be BF |
2170 | clp->cl_nfsd_dentry = NULL; |
2171 | wake_up_all(&expiry_wq); | |
2172 | } | |
59f8e91b | 2173 | drop_client(clp); |
1da177e4 LT |
2174 | } |
2175 | ||
84d38ac9 | 2176 | /* must be called under the client_lock */ |
4beb345b | 2177 | static void |
84d38ac9 BH |
2178 | unhash_client_locked(struct nfs4_client *clp) |
2179 | { | |
4beb345b | 2180 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
792c95dd BF |
2181 | struct nfsd4_session *ses; |
2182 | ||
0a880a28 TM |
2183 | lockdep_assert_held(&nn->client_lock); |
2184 | ||
4beb345b TM |
2185 | /* Mark the client as expired! */ |
2186 | clp->cl_time = 0; | |
2187 | /* Make it invisible */ | |
2188 | if (!list_empty(&clp->cl_idhash)) { | |
2189 | list_del_init(&clp->cl_idhash); | |
2190 | if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) | |
2191 | rb_erase(&clp->cl_namenode, &nn->conf_name_tree); | |
2192 | else | |
2193 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); | |
2194 | } | |
2195 | list_del_init(&clp->cl_lru); | |
4c649378 | 2196 | spin_lock(&clp->cl_lock); |
792c95dd BF |
2197 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
2198 | list_del_init(&ses->se_hash); | |
4c649378 | 2199 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
2200 | } |
2201 | ||
1da177e4 | 2202 | static void |
4beb345b TM |
2203 | unhash_client(struct nfs4_client *clp) |
2204 | { | |
2205 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
2206 | ||
2207 | spin_lock(&nn->client_lock); | |
2208 | unhash_client_locked(clp); | |
2209 | spin_unlock(&nn->client_lock); | |
2210 | } | |
2211 | ||
97403d95 JL |
2212 | static __be32 mark_client_expired_locked(struct nfs4_client *clp) |
2213 | { | |
14ed14cc | 2214 | if (atomic_read(&clp->cl_rpc_users)) |
97403d95 JL |
2215 | return nfserr_jukebox; |
2216 | unhash_client_locked(clp); | |
2217 | return nfs_ok; | |
2218 | } | |
2219 | ||
4beb345b TM |
2220 | static void |
2221 | __destroy_client(struct nfs4_client *clp) | |
1da177e4 | 2222 | { |
0926c395 | 2223 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
68ef3bc3 | 2224 | int i; |
fe0750e5 | 2225 | struct nfs4_openowner *oo; |
1da177e4 | 2226 | struct nfs4_delegation *dp; |
1da177e4 LT |
2227 | struct list_head reaplist; |
2228 | ||
1da177e4 | 2229 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 2230 | spin_lock(&state_lock); |
ea1da636 N |
2231 | while (!list_empty(&clp->cl_delegations)) { |
2232 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
3fcbbd24 | 2233 | WARN_ON(!unhash_delegation_locked(dp)); |
42690676 | 2234 | list_add(&dp->dl_recall_lru, &reaplist); |
1da177e4 | 2235 | } |
cdc97505 | 2236 | spin_unlock(&state_lock); |
1da177e4 LT |
2237 | while (!list_empty(&reaplist)) { |
2238 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
42690676 | 2239 | list_del_init(&dp->dl_recall_lru); |
0af6e690 | 2240 | destroy_unhashed_deleg(dp); |
1da177e4 | 2241 | } |
2d4a532d | 2242 | while (!list_empty(&clp->cl_revoked)) { |
c876486b | 2243 | dp = list_entry(clp->cl_revoked.next, struct nfs4_delegation, dl_recall_lru); |
2d4a532d | 2244 | list_del_init(&dp->dl_recall_lru); |
6011695d | 2245 | nfs4_put_stid(&dp->dl_stid); |
956c4fee | 2246 | } |
ea1da636 | 2247 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 | 2248 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
b5971afa | 2249 | nfs4_get_stateowner(&oo->oo_owner); |
fe0750e5 | 2250 | release_openowner(oo); |
1da177e4 | 2251 | } |
68ef3bc3 JL |
2252 | for (i = 0; i < OWNER_HASH_SIZE; i++) { |
2253 | struct nfs4_stateowner *so, *tmp; | |
2254 | ||
2255 | list_for_each_entry_safe(so, tmp, &clp->cl_ownerstr_hashtbl[i], | |
2256 | so_strhash) { | |
2257 | /* Should be no openowners at this point */ | |
2258 | WARN_ON_ONCE(so->so_is_open_owner); | |
2259 | remove_blocked_locks(lockowner(so)); | |
2260 | } | |
2261 | } | |
9cf514cc | 2262 | nfsd4_return_all_client_layouts(clp); |
e0639dc5 | 2263 | nfsd4_shutdown_copy(clp); |
6ff8da08 | 2264 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
2265 | if (clp->cl_cb_conn.cb_xprt) |
2266 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
0926c395 | 2267 | atomic_add_unless(&nn->nfs4_client_count, -1, 0); |
3a4ea23d | 2268 | nfsd4_dec_courtesy_client_count(nn, clp); |
221a6876 | 2269 | free_client(clp); |
89c905be | 2270 | wake_up_all(&expiry_wq); |
1da177e4 LT |
2271 | } |
2272 | ||
4beb345b TM |
2273 | static void |
2274 | destroy_client(struct nfs4_client *clp) | |
2275 | { | |
2276 | unhash_client(clp); | |
2277 | __destroy_client(clp); | |
2278 | } | |
2279 | ||
362063a5 SM |
2280 | static void inc_reclaim_complete(struct nfs4_client *clp) |
2281 | { | |
2282 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
2283 | ||
2284 | if (!nn->track_reclaim_completes) | |
2285 | return; | |
2286 | if (!nfsd4_find_reclaim_client(clp->cl_name, nn)) | |
2287 | return; | |
2288 | if (atomic_inc_return(&nn->nr_reclaim_complete) == | |
2289 | nn->reclaim_str_hashtbl_size) { | |
2290 | printk(KERN_INFO "NFSD: all clients done reclaiming, ending NFSv4 grace period (net %x)\n", | |
2291 | clp->net->ns.inum); | |
2292 | nfsd4_end_grace(nn); | |
2293 | } | |
2294 | } | |
2295 | ||
0d22f68f BF |
2296 | static void expire_client(struct nfs4_client *clp) |
2297 | { | |
4beb345b | 2298 | unhash_client(clp); |
0d22f68f | 2299 | nfsd4_client_record_remove(clp); |
4beb345b | 2300 | __destroy_client(clp); |
0d22f68f BF |
2301 | } |
2302 | ||
35bba9a3 BF |
2303 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
2304 | { | |
2305 | memcpy(target->cl_verifier.data, source->data, | |
2306 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
2307 | } |
2308 | ||
35bba9a3 BF |
2309 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
2310 | { | |
1da177e4 LT |
2311 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
2312 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
2313 | } | |
2314 | ||
50043859 BF |
2315 | static int copy_cred(struct svc_cred *target, struct svc_cred *source) |
2316 | { | |
2f10fdcb N |
2317 | target->cr_principal = kstrdup(source->cr_principal, GFP_KERNEL); |
2318 | target->cr_raw_principal = kstrdup(source->cr_raw_principal, | |
2319 | GFP_KERNEL); | |
9abdda5d CL |
2320 | target->cr_targ_princ = kstrdup(source->cr_targ_princ, GFP_KERNEL); |
2321 | if ((source->cr_principal && !target->cr_principal) || | |
2322 | (source->cr_raw_principal && !target->cr_raw_principal) || | |
2323 | (source->cr_targ_princ && !target->cr_targ_princ)) | |
2f10fdcb | 2324 | return -ENOMEM; |
50043859 | 2325 | |
d5497fc6 | 2326 | target->cr_flavor = source->cr_flavor; |
1da177e4 LT |
2327 | target->cr_uid = source->cr_uid; |
2328 | target->cr_gid = source->cr_gid; | |
2329 | target->cr_group_info = source->cr_group_info; | |
2330 | get_group_info(target->cr_group_info); | |
0dc1531a BF |
2331 | target->cr_gss_mech = source->cr_gss_mech; |
2332 | if (source->cr_gss_mech) | |
2333 | gss_mech_get(source->cr_gss_mech); | |
03a4e1f6 | 2334 | return 0; |
1da177e4 LT |
2335 | } |
2336 | ||
ef17af2a | 2337 | static int |
ac55fdc4 JL |
2338 | compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2) |
2339 | { | |
ef17af2a RV |
2340 | if (o1->len < o2->len) |
2341 | return -1; | |
2342 | if (o1->len > o2->len) | |
2343 | return 1; | |
2344 | return memcmp(o1->data, o2->data, o1->len); | |
ac55fdc4 JL |
2345 | } |
2346 | ||
1da177e4 | 2347 | static int |
599e0a22 BF |
2348 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
2349 | { | |
2350 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
2351 | } |
2352 | ||
2353 | static int | |
599e0a22 BF |
2354 | same_clid(clientid_t *cl1, clientid_t *cl2) |
2355 | { | |
2356 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
2357 | } |
2358 | ||
8fbba96e BF |
2359 | static bool groups_equal(struct group_info *g1, struct group_info *g2) |
2360 | { | |
2361 | int i; | |
2362 | ||
2363 | if (g1->ngroups != g2->ngroups) | |
2364 | return false; | |
2365 | for (i=0; i<g1->ngroups; i++) | |
81243eac | 2366 | if (!gid_eq(g1->gid[i], g2->gid[i])) |
8fbba96e BF |
2367 | return false; |
2368 | return true; | |
2369 | } | |
2370 | ||
68eb3508 BF |
2371 | /* |
2372 | * RFC 3530 language requires clid_inuse be returned when the | |
2373 | * "principal" associated with a requests differs from that previously | |
2374 | * used. We use uid, gid's, and gss principal string as our best | |
2375 | * approximation. We also don't want to allow non-gss use of a client | |
2376 | * established using gss: in theory cr_principal should catch that | |
2377 | * change, but in practice cr_principal can be null even in the gss case | |
2378 | * since gssd doesn't always pass down a principal string. | |
2379 | */ | |
2380 | static bool is_gss_cred(struct svc_cred *cr) | |
2381 | { | |
2382 | /* Is cr_flavor one of the gss "pseudoflavors"?: */ | |
2383 | return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR); | |
2384 | } | |
2385 | ||
2386 | ||
5559b50a | 2387 | static bool |
599e0a22 BF |
2388 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
2389 | { | |
68eb3508 | 2390 | if ((is_gss_cred(cr1) != is_gss_cred(cr2)) |
6fab8779 EB |
2391 | || (!uid_eq(cr1->cr_uid, cr2->cr_uid)) |
2392 | || (!gid_eq(cr1->cr_gid, cr2->cr_gid)) | |
8fbba96e BF |
2393 | || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) |
2394 | return false; | |
9abdda5d | 2395 | /* XXX: check that cr_targ_princ fields match ? */ |
8fbba96e BF |
2396 | if (cr1->cr_principal == cr2->cr_principal) |
2397 | return true; | |
2398 | if (!cr1->cr_principal || !cr2->cr_principal) | |
2399 | return false; | |
5559b50a | 2400 | return 0 == strcmp(cr1->cr_principal, cr2->cr_principal); |
1da177e4 LT |
2401 | } |
2402 | ||
57266a6e BF |
2403 | static bool svc_rqst_integrity_protected(struct svc_rqst *rqstp) |
2404 | { | |
2405 | struct svc_cred *cr = &rqstp->rq_cred; | |
2406 | u32 service; | |
2407 | ||
c4720591 BF |
2408 | if (!cr->cr_gss_mech) |
2409 | return false; | |
57266a6e BF |
2410 | service = gss_pseudoflavor_to_service(cr->cr_gss_mech, cr->cr_flavor); |
2411 | return service == RPC_GSS_SVC_INTEGRITY || | |
2412 | service == RPC_GSS_SVC_PRIVACY; | |
2413 | } | |
2414 | ||
dedeb13f | 2415 | bool nfsd4_mach_creds_match(struct nfs4_client *cl, struct svc_rqst *rqstp) |
57266a6e BF |
2416 | { |
2417 | struct svc_cred *cr = &rqstp->rq_cred; | |
2418 | ||
2419 | if (!cl->cl_mach_cred) | |
2420 | return true; | |
2421 | if (cl->cl_cred.cr_gss_mech != cr->cr_gss_mech) | |
2422 | return false; | |
2423 | if (!svc_rqst_integrity_protected(rqstp)) | |
2424 | return false; | |
414ca017 BF |
2425 | if (cl->cl_cred.cr_raw_principal) |
2426 | return 0 == strcmp(cl->cl_cred.cr_raw_principal, | |
2427 | cr->cr_raw_principal); | |
57266a6e BF |
2428 | if (!cr->cr_principal) |
2429 | return false; | |
2430 | return 0 == strcmp(cl->cl_cred.cr_principal, cr->cr_principal); | |
2431 | } | |
2432 | ||
294ac32e | 2433 | static void gen_confirm(struct nfs4_client *clp, struct nfsd_net *nn) |
deda2faa | 2434 | { |
ab4684d1 | 2435 | __be32 verf[2]; |
1da177e4 | 2436 | |
f419992c JL |
2437 | /* |
2438 | * This is opaque to client, so no need to byte-swap. Use | |
2439 | * __force to keep sparse happy | |
2440 | */ | |
9104ae49 | 2441 | verf[0] = (__force __be32)(u32)ktime_get_real_seconds(); |
19311aa8 | 2442 | verf[1] = (__force __be32)nn->clverifier_counter++; |
ab4684d1 | 2443 | memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); |
1da177e4 LT |
2444 | } |
2445 | ||
294ac32e JL |
2446 | static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn) |
2447 | { | |
9cc76801 | 2448 | clp->cl_clientid.cl_boot = (u32)nn->boot_time; |
294ac32e JL |
2449 | clp->cl_clientid.cl_id = nn->clientid_counter++; |
2450 | gen_confirm(clp, nn); | |
2451 | } | |
2452 | ||
4770d722 JL |
2453 | static struct nfs4_stid * |
2454 | find_stateid_locked(struct nfs4_client *cl, stateid_t *t) | |
4581d140 | 2455 | { |
3abdb607 BF |
2456 | struct nfs4_stid *ret; |
2457 | ||
2458 | ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id); | |
2459 | if (!ret || !ret->sc_type) | |
2460 | return NULL; | |
2461 | return ret; | |
4d71ab87 BF |
2462 | } |
2463 | ||
4770d722 JL |
2464 | static struct nfs4_stid * |
2465 | find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) | |
f459e453 BF |
2466 | { |
2467 | struct nfs4_stid *s; | |
4d71ab87 | 2468 | |
4770d722 JL |
2469 | spin_lock(&cl->cl_lock); |
2470 | s = find_stateid_locked(cl, t); | |
2d3f9668 TM |
2471 | if (s != NULL) { |
2472 | if (typemask & s->sc_type) | |
a15dfcd5 | 2473 | refcount_inc(&s->sc_count); |
2d3f9668 TM |
2474 | else |
2475 | s = NULL; | |
2476 | } | |
4770d722 JL |
2477 | spin_unlock(&cl->cl_lock); |
2478 | return s; | |
4581d140 BF |
2479 | } |
2480 | ||
a204f25e BF |
2481 | static struct nfs4_client *get_nfsdfs_clp(struct inode *inode) |
2482 | { | |
2483 | struct nfsdfs_client *nc; | |
2484 | nc = get_nfsdfs_client(inode); | |
2485 | if (!nc) | |
2486 | return NULL; | |
2487 | return container_of(nc, struct nfs4_client, cl_nfsdfs); | |
2488 | } | |
2489 | ||
169319f1 BF |
2490 | static void seq_quote_mem(struct seq_file *m, char *data, int len) |
2491 | { | |
2492 | seq_printf(m, "\""); | |
c0546391 | 2493 | seq_escape_mem(m, data, len, ESCAPE_HEX | ESCAPE_NAP | ESCAPE_APPEND, "\"\\"); |
169319f1 BF |
2494 | seq_printf(m, "\""); |
2495 | } | |
2496 | ||
3518c866 DW |
2497 | static const char *cb_state2str(int state) |
2498 | { | |
2499 | switch (state) { | |
2500 | case NFSD4_CB_UP: | |
2501 | return "UP"; | |
2502 | case NFSD4_CB_UNKNOWN: | |
2503 | return "UNKNOWN"; | |
2504 | case NFSD4_CB_DOWN: | |
2505 | return "DOWN"; | |
2506 | case NFSD4_CB_FAULT: | |
2507 | return "FAULT"; | |
2508 | } | |
2509 | return "UNDEFINED"; | |
2510 | } | |
2511 | ||
97ad4031 BF |
2512 | static int client_info_show(struct seq_file *m, void *v) |
2513 | { | |
1d7f6b30 | 2514 | struct inode *inode = file_inode(m->file); |
97ad4031 BF |
2515 | struct nfs4_client *clp; |
2516 | u64 clid; | |
2517 | ||
a204f25e BF |
2518 | clp = get_nfsdfs_clp(inode); |
2519 | if (!clp) | |
97ad4031 | 2520 | return -ENXIO; |
97ad4031 BF |
2521 | memcpy(&clid, &clp->cl_clientid, sizeof(clid)); |
2522 | seq_printf(m, "clientid: 0x%llx\n", clid); | |
169319f1 | 2523 | seq_printf(m, "address: \"%pISpc\"\n", (struct sockaddr *)&clp->cl_addr); |
e9488d5a DN |
2524 | |
2525 | if (clp->cl_state == NFSD4_COURTESY) | |
2526 | seq_puts(m, "status: courtesy\n"); | |
2527 | else if (clp->cl_state == NFSD4_EXPIRABLE) | |
2528 | seq_puts(m, "status: expirable\n"); | |
2529 | else if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) | |
472d155a N |
2530 | seq_puts(m, "status: confirmed\n"); |
2531 | else | |
2532 | seq_puts(m, "status: unconfirmed\n"); | |
e9488d5a DN |
2533 | seq_printf(m, "seconds from last renew: %lld\n", |
2534 | ktime_get_boottime_seconds() - clp->cl_time); | |
169319f1 BF |
2535 | seq_printf(m, "name: "); |
2536 | seq_quote_mem(m, clp->cl_name.data, clp->cl_name.len); | |
2537 | seq_printf(m, "\nminor version: %d\n", clp->cl_minorversion); | |
79123444 BF |
2538 | if (clp->cl_nii_domain.data) { |
2539 | seq_printf(m, "Implementation domain: "); | |
2540 | seq_quote_mem(m, clp->cl_nii_domain.data, | |
2541 | clp->cl_nii_domain.len); | |
2542 | seq_printf(m, "\nImplementation name: "); | |
2543 | seq_quote_mem(m, clp->cl_nii_name.data, clp->cl_nii_name.len); | |
e29f4703 | 2544 | seq_printf(m, "\nImplementation time: [%lld, %ld]\n", |
79123444 BF |
2545 | clp->cl_nii_time.tv_sec, clp->cl_nii_time.tv_nsec); |
2546 | } | |
3518c866 DW |
2547 | seq_printf(m, "callback state: %s\n", cb_state2str(clp->cl_cb_state)); |
2548 | seq_printf(m, "callback address: %pISpc\n", &clp->cl_cb_conn.cb_addr); | |
97ad4031 BF |
2549 | drop_client(clp); |
2550 | ||
2551 | return 0; | |
2552 | } | |
2553 | ||
1d7f6b30 | 2554 | DEFINE_SHOW_ATTRIBUTE(client_info); |
97ad4031 | 2555 | |
78599c42 BF |
2556 | static void *states_start(struct seq_file *s, loff_t *pos) |
2557 | __acquires(&clp->cl_lock) | |
2558 | { | |
2559 | struct nfs4_client *clp = s->private; | |
2560 | unsigned long id = *pos; | |
2561 | void *ret; | |
2562 | ||
2563 | spin_lock(&clp->cl_lock); | |
2564 | ret = idr_get_next_ul(&clp->cl_stateids, &id); | |
2565 | *pos = id; | |
2566 | return ret; | |
2567 | } | |
2568 | ||
2569 | static void *states_next(struct seq_file *s, void *v, loff_t *pos) | |
2570 | { | |
2571 | struct nfs4_client *clp = s->private; | |
2572 | unsigned long id = *pos; | |
2573 | void *ret; | |
2574 | ||
2575 | id = *pos; | |
2576 | id++; | |
2577 | ret = idr_get_next_ul(&clp->cl_stateids, &id); | |
2578 | *pos = id; | |
2579 | return ret; | |
2580 | } | |
2581 | ||
2582 | static void states_stop(struct seq_file *s, void *v) | |
2583 | __releases(&clp->cl_lock) | |
2584 | { | |
2585 | struct nfs4_client *clp = s->private; | |
2586 | ||
2587 | spin_unlock(&clp->cl_lock); | |
2588 | } | |
2589 | ||
580da465 AG |
2590 | static void nfs4_show_fname(struct seq_file *s, struct nfsd_file *f) |
2591 | { | |
2592 | seq_printf(s, "filename: \"%pD2\"", f->nf_file); | |
2593 | } | |
2594 | ||
fd4f83fd | 2595 | static void nfs4_show_superblock(struct seq_file *s, struct nfsd_file *f) |
78599c42 | 2596 | { |
427f5f83 | 2597 | struct inode *inode = file_inode(f->nf_file); |
78599c42 BF |
2598 | |
2599 | seq_printf(s, "superblock: \"%02x:%02x:%ld\"", | |
2600 | MAJOR(inode->i_sb->s_dev), | |
2601 | MINOR(inode->i_sb->s_dev), | |
2602 | inode->i_ino); | |
2603 | } | |
2604 | ||
2605 | static void nfs4_show_owner(struct seq_file *s, struct nfs4_stateowner *oo) | |
2606 | { | |
2607 | seq_printf(s, "owner: "); | |
2608 | seq_quote_mem(s, oo->so_owner.data, oo->so_owner.len); | |
2609 | } | |
2610 | ||
ace7ade4 BF |
2611 | static void nfs4_show_stateid(struct seq_file *s, stateid_t *stid) |
2612 | { | |
ee590d25 BF |
2613 | seq_printf(s, "0x%.8x", stid->si_generation); |
2614 | seq_printf(s, "%12phN", &stid->si_opaque); | |
ace7ade4 BF |
2615 | } |
2616 | ||
78599c42 BF |
2617 | static int nfs4_show_open(struct seq_file *s, struct nfs4_stid *st) |
2618 | { | |
2619 | struct nfs4_ol_stateid *ols; | |
2620 | struct nfs4_file *nf; | |
fd4f83fd | 2621 | struct nfsd_file *file; |
78599c42 BF |
2622 | struct nfs4_stateowner *oo; |
2623 | unsigned int access, deny; | |
2624 | ||
2625 | if (st->sc_type != NFS4_OPEN_STID && st->sc_type != NFS4_LOCK_STID) | |
2626 | return 0; /* XXX: or SEQ_SKIP? */ | |
2627 | ols = openlockstateid(st); | |
2628 | oo = ols->st_stateowner; | |
2629 | nf = st->sc_file; | |
e0aa6510 JL |
2630 | |
2631 | spin_lock(&nf->fi_lock); | |
2632 | file = find_any_file_locked(nf); | |
9affa435 | 2633 | if (!file) |
e0aa6510 | 2634 | goto out; |
78599c42 | 2635 | |
ace7ade4 BF |
2636 | seq_printf(s, "- "); |
2637 | nfs4_show_stateid(s, &st->sc_stateid); | |
2638 | seq_printf(s, ": { type: open, "); | |
78599c42 BF |
2639 | |
2640 | access = bmap_to_share_mode(ols->st_access_bmap); | |
2641 | deny = bmap_to_share_mode(ols->st_deny_bmap); | |
2642 | ||
c4b77edb | 2643 | seq_printf(s, "access: %s%s, ", |
78599c42 BF |
2644 | access & NFS4_SHARE_ACCESS_READ ? "r" : "-", |
2645 | access & NFS4_SHARE_ACCESS_WRITE ? "w" : "-"); | |
c4b77edb | 2646 | seq_printf(s, "deny: %s%s, ", |
78599c42 BF |
2647 | deny & NFS4_SHARE_ACCESS_READ ? "r" : "-", |
2648 | deny & NFS4_SHARE_ACCESS_WRITE ? "w" : "-"); | |
2649 | ||
2650 | nfs4_show_superblock(s, file); | |
2651 | seq_printf(s, ", "); | |
580da465 AG |
2652 | nfs4_show_fname(s, file); |
2653 | seq_printf(s, ", "); | |
78599c42 BF |
2654 | nfs4_show_owner(s, oo); |
2655 | seq_printf(s, " }\n"); | |
e0aa6510 JL |
2656 | out: |
2657 | spin_unlock(&nf->fi_lock); | |
16d36e09 BF |
2658 | return 0; |
2659 | } | |
2660 | ||
2661 | static int nfs4_show_lock(struct seq_file *s, struct nfs4_stid *st) | |
2662 | { | |
2663 | struct nfs4_ol_stateid *ols; | |
2664 | struct nfs4_file *nf; | |
fd4f83fd | 2665 | struct nfsd_file *file; |
16d36e09 BF |
2666 | struct nfs4_stateowner *oo; |
2667 | ||
2668 | ols = openlockstateid(st); | |
2669 | oo = ols->st_stateowner; | |
2670 | nf = st->sc_file; | |
e0aa6510 JL |
2671 | spin_lock(&nf->fi_lock); |
2672 | file = find_any_file_locked(nf); | |
9affa435 | 2673 | if (!file) |
e0aa6510 | 2674 | goto out; |
16d36e09 | 2675 | |
ace7ade4 BF |
2676 | seq_printf(s, "- "); |
2677 | nfs4_show_stateid(s, &st->sc_stateid); | |
2678 | seq_printf(s, ": { type: lock, "); | |
16d36e09 BF |
2679 | |
2680 | /* | |
2681 | * Note: a lock stateid isn't really the same thing as a lock, | |
2682 | * it's the locking state held by one owner on a file, and there | |
2683 | * may be multiple (or no) lock ranges associated with it. | |
2684 | * (Same for the matter is true of open stateids.) | |
2685 | */ | |
78599c42 | 2686 | |
16d36e09 BF |
2687 | nfs4_show_superblock(s, file); |
2688 | /* XXX: open stateid? */ | |
2689 | seq_printf(s, ", "); | |
580da465 AG |
2690 | nfs4_show_fname(s, file); |
2691 | seq_printf(s, ", "); | |
16d36e09 BF |
2692 | nfs4_show_owner(s, oo); |
2693 | seq_printf(s, " }\n"); | |
e0aa6510 JL |
2694 | out: |
2695 | spin_unlock(&nf->fi_lock); | |
78599c42 BF |
2696 | return 0; |
2697 | } | |
2698 | ||
16d36e09 BF |
2699 | static int nfs4_show_deleg(struct seq_file *s, struct nfs4_stid *st) |
2700 | { | |
2701 | struct nfs4_delegation *ds; | |
2702 | struct nfs4_file *nf; | |
eb82dd39 | 2703 | struct nfsd_file *file; |
16d36e09 BF |
2704 | |
2705 | ds = delegstateid(st); | |
2706 | nf = st->sc_file; | |
e0aa6510 JL |
2707 | spin_lock(&nf->fi_lock); |
2708 | file = find_deleg_file_locked(nf); | |
9affa435 | 2709 | if (!file) |
e0aa6510 | 2710 | goto out; |
16d36e09 | 2711 | |
ace7ade4 BF |
2712 | seq_printf(s, "- "); |
2713 | nfs4_show_stateid(s, &st->sc_stateid); | |
2714 | seq_printf(s, ": { type: deleg, "); | |
16d36e09 BF |
2715 | |
2716 | /* Kinda dead code as long as we only support read delegs: */ | |
2717 | seq_printf(s, "access: %s, ", | |
2718 | ds->dl_type == NFS4_OPEN_DELEGATE_READ ? "r" : "w"); | |
2719 | ||
2720 | /* XXX: lease time, whether it's being recalled. */ | |
2721 | ||
2722 | nfs4_show_superblock(s, file); | |
580da465 AG |
2723 | seq_printf(s, ", "); |
2724 | nfs4_show_fname(s, file); | |
16d36e09 | 2725 | seq_printf(s, " }\n"); |
e0aa6510 JL |
2726 | out: |
2727 | spin_unlock(&nf->fi_lock); | |
16d36e09 BF |
2728 | return 0; |
2729 | } | |
2730 | ||
0c4b62b0 BF |
2731 | static int nfs4_show_layout(struct seq_file *s, struct nfs4_stid *st) |
2732 | { | |
2733 | struct nfs4_layout_stateid *ls; | |
eb82dd39 | 2734 | struct nfsd_file *file; |
0c4b62b0 BF |
2735 | |
2736 | ls = container_of(st, struct nfs4_layout_stateid, ls_stid); | |
2737 | file = ls->ls_file; | |
2738 | ||
ace7ade4 BF |
2739 | seq_printf(s, "- "); |
2740 | nfs4_show_stateid(s, &st->sc_stateid); | |
2741 | seq_printf(s, ": { type: layout, "); | |
0c4b62b0 BF |
2742 | |
2743 | /* XXX: What else would be useful? */ | |
2744 | ||
2745 | nfs4_show_superblock(s, file); | |
580da465 AG |
2746 | seq_printf(s, ", "); |
2747 | nfs4_show_fname(s, file); | |
0c4b62b0 BF |
2748 | seq_printf(s, " }\n"); |
2749 | ||
2750 | return 0; | |
2751 | } | |
2752 | ||
78599c42 BF |
2753 | static int states_show(struct seq_file *s, void *v) |
2754 | { | |
2755 | struct nfs4_stid *st = v; | |
2756 | ||
2757 | switch (st->sc_type) { | |
2758 | case NFS4_OPEN_STID: | |
2759 | return nfs4_show_open(s, st); | |
16d36e09 BF |
2760 | case NFS4_LOCK_STID: |
2761 | return nfs4_show_lock(s, st); | |
2762 | case NFS4_DELEG_STID: | |
2763 | return nfs4_show_deleg(s, st); | |
0c4b62b0 BF |
2764 | case NFS4_LAYOUT_STID: |
2765 | return nfs4_show_layout(s, st); | |
78599c42 BF |
2766 | default: |
2767 | return 0; /* XXX: or SEQ_SKIP? */ | |
2768 | } | |
16d36e09 | 2769 | /* XXX: copy stateids? */ |
78599c42 BF |
2770 | } |
2771 | ||
2772 | static struct seq_operations states_seq_ops = { | |
2773 | .start = states_start, | |
2774 | .next = states_next, | |
2775 | .stop = states_stop, | |
2776 | .show = states_show | |
2777 | }; | |
2778 | ||
2779 | static int client_states_open(struct inode *inode, struct file *file) | |
2780 | { | |
78599c42 BF |
2781 | struct seq_file *s; |
2782 | struct nfs4_client *clp; | |
2783 | int ret; | |
2784 | ||
a204f25e BF |
2785 | clp = get_nfsdfs_clp(inode); |
2786 | if (!clp) | |
78599c42 | 2787 | return -ENXIO; |
78599c42 BF |
2788 | |
2789 | ret = seq_open(file, &states_seq_ops); | |
2790 | if (ret) | |
2791 | return ret; | |
2792 | s = file->private_data; | |
2793 | s->private = clp; | |
2794 | return 0; | |
2795 | } | |
2796 | ||
2797 | static int client_opens_release(struct inode *inode, struct file *file) | |
2798 | { | |
2799 | struct seq_file *m = file->private_data; | |
2800 | struct nfs4_client *clp = m->private; | |
2801 | ||
2802 | /* XXX: alternatively, we could get/drop in seq start/stop */ | |
2803 | drop_client(clp); | |
2804 | return 0; | |
2805 | } | |
2806 | ||
2807 | static const struct file_operations client_states_fops = { | |
2808 | .open = client_states_open, | |
2809 | .read = seq_read, | |
2810 | .llseek = seq_lseek, | |
2811 | .release = client_opens_release, | |
2812 | }; | |
2813 | ||
89c905be BF |
2814 | /* |
2815 | * Normally we refuse to destroy clients that are in use, but here the | |
2816 | * administrator is telling us to just do it. We also want to wait | |
2817 | * so the caller has a guarantee that the client's locks are gone by | |
2818 | * the time the write returns: | |
2819 | */ | |
297e57a2 | 2820 | static void force_expire_client(struct nfs4_client *clp) |
89c905be BF |
2821 | { |
2822 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
2823 | bool already_expired; | |
2824 | ||
2958d2ee CL |
2825 | trace_nfsd_clid_admin_expired(&clp->cl_clientid); |
2826 | ||
f7104cc1 | 2827 | spin_lock(&nn->client_lock); |
89c905be | 2828 | clp->cl_time = 0; |
f7104cc1 | 2829 | spin_unlock(&nn->client_lock); |
89c905be BF |
2830 | |
2831 | wait_event(expiry_wq, atomic_read(&clp->cl_rpc_users) == 0); | |
2832 | spin_lock(&nn->client_lock); | |
2833 | already_expired = list_empty(&clp->cl_lru); | |
2834 | if (!already_expired) | |
2835 | unhash_client_locked(clp); | |
2836 | spin_unlock(&nn->client_lock); | |
2837 | ||
2838 | if (!already_expired) | |
2839 | expire_client(clp); | |
2840 | else | |
2841 | wait_event(expiry_wq, clp->cl_nfsd_dentry == NULL); | |
2842 | } | |
2843 | ||
2844 | static ssize_t client_ctl_write(struct file *file, const char __user *buf, | |
2845 | size_t size, loff_t *pos) | |
2846 | { | |
2847 | char *data; | |
2848 | struct nfs4_client *clp; | |
2849 | ||
2850 | data = simple_transaction_get(file, buf, size); | |
2851 | if (IS_ERR(data)) | |
2852 | return PTR_ERR(data); | |
2853 | if (size != 7 || 0 != memcmp(data, "expire\n", 7)) | |
2854 | return -EINVAL; | |
2855 | clp = get_nfsdfs_clp(file_inode(file)); | |
2856 | if (!clp) | |
2857 | return -ENXIO; | |
2858 | force_expire_client(clp); | |
2859 | drop_client(clp); | |
2860 | return 7; | |
2861 | } | |
2862 | ||
2863 | static const struct file_operations client_ctl_fops = { | |
2864 | .write = client_ctl_write, | |
2865 | .release = simple_transaction_release, | |
2866 | }; | |
2867 | ||
97ad4031 BF |
2868 | static const struct tree_descr client_files[] = { |
2869 | [0] = {"info", &client_info_fops, S_IRUSR}, | |
78599c42 | 2870 | [1] = {"states", &client_states_fops, S_IRUSR}, |
6cbfad5f | 2871 | [2] = {"ctl", &client_ctl_fops, S_IWUSR}, |
78599c42 | 2872 | [3] = {""}, |
97ad4031 BF |
2873 | }; |
2874 | ||
44df6f43 DN |
2875 | static int |
2876 | nfsd4_cb_recall_any_done(struct nfsd4_callback *cb, | |
2877 | struct rpc_task *task) | |
2878 | { | |
638593be | 2879 | trace_nfsd_cb_recall_any_done(cb, task); |
44df6f43 DN |
2880 | switch (task->tk_status) { |
2881 | case -NFS4ERR_DELAY: | |
2882 | rpc_delay(task, 2 * HZ); | |
2883 | return 0; | |
2884 | default: | |
2885 | return 1; | |
2886 | } | |
2887 | } | |
2888 | ||
2889 | static void | |
2890 | nfsd4_cb_recall_any_release(struct nfsd4_callback *cb) | |
2891 | { | |
2892 | struct nfs4_client *clp = cb->cb_clp; | |
2893 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
2894 | ||
2895 | spin_lock(&nn->client_lock); | |
2896 | clear_bit(NFSD4_CLIENT_CB_RECALL_ANY, &clp->cl_flags); | |
2897 | put_client_renew_locked(clp); | |
2898 | spin_unlock(&nn->client_lock); | |
2899 | } | |
2900 | ||
2901 | static const struct nfsd4_callback_ops nfsd4_cb_recall_any_ops = { | |
2902 | .done = nfsd4_cb_recall_any_done, | |
2903 | .release = nfsd4_cb_recall_any_release, | |
2904 | }; | |
2905 | ||
2216d449 | 2906 | static struct nfs4_client *create_client(struct xdr_netobj name, |
b09333c4 RL |
2907 | struct svc_rqst *rqstp, nfs4_verifier *verf) |
2908 | { | |
2909 | struct nfs4_client *clp; | |
2910 | struct sockaddr *sa = svc_addr(rqstp); | |
03a4e1f6 | 2911 | int ret; |
c212cecf | 2912 | struct net *net = SVC_NET(rqstp); |
e8a79fb1 | 2913 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
472d155a | 2914 | struct dentry *dentries[ARRAY_SIZE(client_files)]; |
b09333c4 | 2915 | |
0926c395 | 2916 | clp = alloc_client(name, nn); |
b09333c4 RL |
2917 | if (clp == NULL) |
2918 | return NULL; | |
2919 | ||
03a4e1f6 BF |
2920 | ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); |
2921 | if (ret) { | |
03a4e1f6 | 2922 | free_client(clp); |
03a4e1f6 | 2923 | return NULL; |
b09333c4 | 2924 | } |
e8a79fb1 BF |
2925 | gen_clid(clp, nn); |
2926 | kref_init(&clp->cl_nfsdfs.cl_ref); | |
0162ac2b | 2927 | nfsd4_init_cb(&clp->cl_cb_null, clp, NULL, NFSPROC4_CLNT_CB_NULL); |
20b7d86f | 2928 | clp->cl_time = ktime_get_boottime_seconds(); |
b09333c4 | 2929 | clear_bit(0, &clp->cl_cb_slot_busy); |
b09333c4 | 2930 | copy_verf(clp, verf); |
3bade247 | 2931 | memcpy(&clp->cl_addr, sa, sizeof(struct sockaddr_storage)); |
edd76786 | 2932 | clp->cl_cb_session = NULL; |
c212cecf | 2933 | clp->net = net; |
472d155a N |
2934 | clp->cl_nfsd_dentry = nfsd_client_mkdir( |
2935 | nn, &clp->cl_nfsdfs, | |
2936 | clp->cl_clientid.cl_id - nn->clientid_base, | |
2937 | client_files, dentries); | |
2938 | clp->cl_nfsd_info_dentry = dentries[0]; | |
e8a79fb1 BF |
2939 | if (!clp->cl_nfsd_dentry) { |
2940 | free_client(clp); | |
2941 | return NULL; | |
2942 | } | |
44df6f43 DN |
2943 | clp->cl_ra = kzalloc(sizeof(*clp->cl_ra), GFP_KERNEL); |
2944 | if (!clp->cl_ra) { | |
2945 | free_client(clp); | |
2946 | return NULL; | |
2947 | } | |
2948 | clp->cl_ra_time = 0; | |
2949 | nfsd4_init_cb(&clp->cl_ra->ra_cb, clp, &nfsd4_cb_recall_any_ops, | |
2950 | NFSPROC4_CLNT_CB_RECALL_ANY); | |
b09333c4 RL |
2951 | return clp; |
2952 | } | |
2953 | ||
fd39ca9a | 2954 | static void |
ac55fdc4 JL |
2955 | add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root) |
2956 | { | |
2957 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
2958 | struct nfs4_client *clp; | |
2959 | ||
2960 | while (*new) { | |
2961 | clp = rb_entry(*new, struct nfs4_client, cl_namenode); | |
2962 | parent = *new; | |
2963 | ||
2964 | if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0) | |
2965 | new = &((*new)->rb_left); | |
2966 | else | |
2967 | new = &((*new)->rb_right); | |
2968 | } | |
2969 | ||
2970 | rb_link_node(&new_clp->cl_namenode, parent, new); | |
2971 | rb_insert_color(&new_clp->cl_namenode, root); | |
2972 | } | |
2973 | ||
2974 | static struct nfs4_client * | |
2975 | find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root) | |
2976 | { | |
ef17af2a | 2977 | int cmp; |
ac55fdc4 JL |
2978 | struct rb_node *node = root->rb_node; |
2979 | struct nfs4_client *clp; | |
2980 | ||
2981 | while (node) { | |
2982 | clp = rb_entry(node, struct nfs4_client, cl_namenode); | |
2983 | cmp = compare_blob(&clp->cl_name, name); | |
2984 | if (cmp > 0) | |
2985 | node = node->rb_left; | |
2986 | else if (cmp < 0) | |
2987 | node = node->rb_right; | |
2988 | else | |
2989 | return clp; | |
2990 | } | |
2991 | return NULL; | |
2992 | } | |
2993 | ||
2994 | static void | |
2995 | add_to_unconfirmed(struct nfs4_client *clp) | |
1da177e4 LT |
2996 | { |
2997 | unsigned int idhashval; | |
0a7ec377 | 2998 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 2999 | |
0a880a28 TM |
3000 | lockdep_assert_held(&nn->client_lock); |
3001 | ||
ac55fdc4 | 3002 | clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
a99454aa | 3003 | add_clp_to_name_tree(clp, &nn->unconf_name_tree); |
1da177e4 | 3004 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
0a7ec377 | 3005 | list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]); |
3dbacee6 | 3006 | renew_client_locked(clp); |
1da177e4 LT |
3007 | } |
3008 | ||
fd39ca9a | 3009 | static void |
1da177e4 LT |
3010 | move_to_confirmed(struct nfs4_client *clp) |
3011 | { | |
3012 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
8daae4dc | 3013 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 3014 | |
0a880a28 TM |
3015 | lockdep_assert_held(&nn->client_lock); |
3016 | ||
8daae4dc | 3017 | list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]); |
a99454aa | 3018 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
382a62e7 | 3019 | add_clp_to_name_tree(clp, &nn->conf_name_tree); |
934bd07f BF |
3020 | set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
3021 | trace_nfsd_clid_confirmed(&clp->cl_clientid); | |
3dbacee6 | 3022 | renew_client_locked(clp); |
1da177e4 LT |
3023 | } |
3024 | ||
3025 | static struct nfs4_client * | |
bfa85e83 | 3026 | find_client_in_id_table(struct list_head *tbl, clientid_t *clid, bool sessions) |
1da177e4 LT |
3027 | { |
3028 | struct nfs4_client *clp; | |
3029 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
3030 | ||
bfa85e83 | 3031 | list_for_each_entry(clp, &tbl[idhashval], cl_idhash) { |
a50d2ad1 | 3032 | if (same_clid(&clp->cl_clientid, clid)) { |
d15c077e BF |
3033 | if ((bool)clp->cl_minorversion != sessions) |
3034 | return NULL; | |
3dbacee6 | 3035 | renew_client_locked(clp); |
1da177e4 | 3036 | return clp; |
a50d2ad1 | 3037 | } |
1da177e4 LT |
3038 | } |
3039 | return NULL; | |
3040 | } | |
3041 | ||
bfa85e83 BF |
3042 | static struct nfs4_client * |
3043 | find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) | |
3044 | { | |
3045 | struct list_head *tbl = nn->conf_id_hashtbl; | |
3046 | ||
0a880a28 | 3047 | lockdep_assert_held(&nn->client_lock); |
bfa85e83 BF |
3048 | return find_client_in_id_table(tbl, clid, sessions); |
3049 | } | |
3050 | ||
1da177e4 | 3051 | static struct nfs4_client * |
0a7ec377 | 3052 | find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
1da177e4 | 3053 | { |
bfa85e83 | 3054 | struct list_head *tbl = nn->unconf_id_hashtbl; |
1da177e4 | 3055 | |
0a880a28 | 3056 | lockdep_assert_held(&nn->client_lock); |
bfa85e83 | 3057 | return find_client_in_id_table(tbl, clid, sessions); |
1da177e4 LT |
3058 | } |
3059 | ||
6e5f15c9 | 3060 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 3061 | { |
6e5f15c9 | 3062 | return clp->cl_exchange_flags != 0; |
e203d506 | 3063 | } |
a1bcecd2 | 3064 | |
28ce6054 | 3065 | static struct nfs4_client * |
382a62e7 | 3066 | find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 3067 | { |
0a880a28 | 3068 | lockdep_assert_held(&nn->client_lock); |
382a62e7 | 3069 | return find_clp_in_name_tree(name, &nn->conf_name_tree); |
28ce6054 N |
3070 | } |
3071 | ||
3072 | static struct nfs4_client * | |
a99454aa | 3073 | find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 3074 | { |
0a880a28 | 3075 | lockdep_assert_held(&nn->client_lock); |
a99454aa | 3076 | return find_clp_in_name_tree(name, &nn->unconf_name_tree); |
28ce6054 N |
3077 | } |
3078 | ||
fd39ca9a | 3079 | static void |
6f3d772f | 3080 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 3081 | { |
07263f1e | 3082 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
3083 | struct sockaddr *sa = svc_addr(rqstp); |
3084 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
3085 | unsigned short expected_family; |
3086 | ||
3087 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
3088 | if (se->se_callback_netid_len == 3 && | |
3089 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
3090 | expected_family = AF_INET; | |
3091 | else if (se->se_callback_netid_len == 4 && | |
3092 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
3093 | expected_family = AF_INET6; | |
3094 | else | |
1da177e4 LT |
3095 | goto out_err; |
3096 | ||
c212cecf | 3097 | conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val, |
aa9a4ec7 | 3098 | se->se_callback_addr_len, |
07263f1e BF |
3099 | (struct sockaddr *)&conn->cb_addr, |
3100 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 3101 | |
07263f1e | 3102 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 3103 | goto out_err; |
aa9a4ec7 | 3104 | |
07263f1e BF |
3105 | if (conn->cb_addr.ss_family == AF_INET6) |
3106 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 3107 | |
07263f1e BF |
3108 | conn->cb_prog = se->se_callback_prog; |
3109 | conn->cb_ident = se->se_callback_ident; | |
849a1cf1 | 3110 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
1eace0d1 | 3111 | trace_nfsd_cb_args(clp, conn); |
1da177e4 LT |
3112 | return; |
3113 | out_err: | |
07263f1e BF |
3114 | conn->cb_addr.ss_family = AF_UNSPEC; |
3115 | conn->cb_addrlen = 0; | |
1eace0d1 | 3116 | trace_nfsd_cb_nodelegs(clp); |
1da177e4 LT |
3117 | return; |
3118 | } | |
3119 | ||
074fe897 | 3120 | /* |
067e1ace | 3121 | * Cache a reply. nfsd4_check_resp_size() has bounded the cache size. |
074fe897 | 3122 | */ |
b607664e | 3123 | static void |
074fe897 | 3124 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) |
074fe897 | 3125 | { |
bddfdbcd | 3126 | struct xdr_buf *buf = resp->xdr->buf; |
557ce264 AA |
3127 | struct nfsd4_slot *slot = resp->cstate.slot; |
3128 | unsigned int base; | |
074fe897 | 3129 | |
557ce264 | 3130 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 3131 | |
085def3a | 3132 | slot->sl_flags |= NFSD4_SLOT_INITIALIZED; |
557ce264 AA |
3133 | slot->sl_opcnt = resp->opcnt; |
3134 | slot->sl_status = resp->cstate.status; | |
53da6a53 BF |
3135 | free_svc_cred(&slot->sl_cred); |
3136 | copy_cred(&slot->sl_cred, &resp->rqstp->rq_cred); | |
074fe897 | 3137 | |
085def3a BF |
3138 | if (!nfsd4_cache_this(resp)) { |
3139 | slot->sl_flags &= ~NFSD4_SLOT_CACHED; | |
bf864a31 | 3140 | return; |
074fe897 | 3141 | } |
085def3a BF |
3142 | slot->sl_flags |= NFSD4_SLOT_CACHED; |
3143 | ||
f5236013 BF |
3144 | base = resp->cstate.data_offset; |
3145 | slot->sl_datalen = buf->len - base; | |
3146 | if (read_bytes_from_xdr_buf(buf, base, slot->sl_data, slot->sl_datalen)) | |
d3f03403 DC |
3147 | WARN(1, "%s: sessions DRC could not cache compound\n", |
3148 | __func__); | |
557ce264 | 3149 | return; |
074fe897 AA |
3150 | } |
3151 | ||
3152 | /* | |
abfabf8c AA |
3153 | * Encode the replay sequence operation from the slot values. |
3154 | * If cachethis is FALSE encode the uncached rep error on the next | |
3155 | * operation which sets resp->p and increments resp->opcnt for | |
3156 | * nfs4svc_encode_compoundres. | |
074fe897 | 3157 | * |
074fe897 | 3158 | */ |
abfabf8c AA |
3159 | static __be32 |
3160 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
3161 | struct nfsd4_compoundres *resp) | |
074fe897 | 3162 | { |
abfabf8c AA |
3163 | struct nfsd4_op *op; |
3164 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 3165 | |
abfabf8c AA |
3166 | /* Encode the replayed sequence operation */ |
3167 | op = &args->ops[resp->opcnt - 1]; | |
3168 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 3169 | |
085def3a BF |
3170 | if (slot->sl_flags & NFSD4_SLOT_CACHED) |
3171 | return op->status; | |
3172 | if (args->opcnt == 1) { | |
3173 | /* | |
3174 | * The original operation wasn't a solo sequence--we | |
3175 | * always cache those--so this retry must not match the | |
3176 | * original: | |
3177 | */ | |
3178 | op->status = nfserr_seq_false_retry; | |
3179 | } else { | |
abfabf8c AA |
3180 | op = &args->ops[resp->opcnt++]; |
3181 | op->status = nfserr_retry_uncached_rep; | |
3182 | nfsd4_encode_operation(resp, op); | |
074fe897 | 3183 | } |
abfabf8c | 3184 | return op->status; |
074fe897 AA |
3185 | } |
3186 | ||
3187 | /* | |
557ce264 AA |
3188 | * The sequence operation is not cached because we can use the slot and |
3189 | * session values. | |
074fe897 | 3190 | */ |
3ca2eb98 | 3191 | static __be32 |
bf864a31 AA |
3192 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
3193 | struct nfsd4_sequence *seq) | |
074fe897 | 3194 | { |
557ce264 | 3195 | struct nfsd4_slot *slot = resp->cstate.slot; |
bddfdbcd | 3196 | struct xdr_stream *xdr = resp->xdr; |
f5236013 | 3197 | __be32 *p; |
074fe897 AA |
3198 | __be32 status; |
3199 | ||
557ce264 | 3200 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 3201 | |
abfabf8c | 3202 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); |
0da7b19c | 3203 | if (status) |
abfabf8c | 3204 | return status; |
074fe897 | 3205 | |
f5236013 BF |
3206 | p = xdr_reserve_space(xdr, slot->sl_datalen); |
3207 | if (!p) { | |
3208 | WARN_ON_ONCE(1); | |
3209 | return nfserr_serverfault; | |
3210 | } | |
3211 | xdr_encode_opaque_fixed(p, slot->sl_data, slot->sl_datalen); | |
3212 | xdr_commit_encode(xdr); | |
074fe897 | 3213 | |
557ce264 | 3214 | resp->opcnt = slot->sl_opcnt; |
f5236013 | 3215 | return slot->sl_status; |
074fe897 AA |
3216 | } |
3217 | ||
0733d213 AA |
3218 | /* |
3219 | * Set the exchange_id flags returned by the server. | |
3220 | */ | |
3221 | static void | |
3222 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
3223 | { | |
9cf514cc CH |
3224 | #ifdef CONFIG_NFSD_PNFS |
3225 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_PNFS_MDS; | |
3226 | #else | |
0733d213 | 3227 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; |
9cf514cc | 3228 | #endif |
0733d213 AA |
3229 | |
3230 | /* Referrals are supported, Migration is not. */ | |
3231 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
3232 | ||
3233 | /* set the wire flags to return to client. */ | |
3234 | clid->flags = new->cl_exchange_flags; | |
3235 | } | |
3236 | ||
4eaea134 BF |
3237 | static bool client_has_openowners(struct nfs4_client *clp) |
3238 | { | |
3239 | struct nfs4_openowner *oo; | |
3240 | ||
3241 | list_for_each_entry(oo, &clp->cl_openowners, oo_perclient) { | |
3242 | if (!list_empty(&oo->oo_owner.so_stateids)) | |
3243 | return true; | |
3244 | } | |
3245 | return false; | |
3246 | } | |
3247 | ||
631fc9ea BF |
3248 | static bool client_has_state(struct nfs4_client *clp) |
3249 | { | |
4eaea134 | 3250 | return client_has_openowners(clp) |
47e970be KM |
3251 | #ifdef CONFIG_NFSD_PNFS |
3252 | || !list_empty(&clp->cl_lo_states) | |
3253 | #endif | |
6eccece9 | 3254 | || !list_empty(&clp->cl_delegations) |
e0639dc5 OK |
3255 | || !list_empty(&clp->cl_sessions) |
3256 | || !list_empty(&clp->async_copies); | |
631fc9ea BF |
3257 | } |
3258 | ||
79123444 BF |
3259 | static __be32 copy_impl_id(struct nfs4_client *clp, |
3260 | struct nfsd4_exchange_id *exid) | |
3261 | { | |
3262 | if (!exid->nii_domain.data) | |
3263 | return 0; | |
3264 | xdr_netobj_dup(&clp->cl_nii_domain, &exid->nii_domain, GFP_KERNEL); | |
3265 | if (!clp->cl_nii_domain.data) | |
3266 | return nfserr_jukebox; | |
3267 | xdr_netobj_dup(&clp->cl_nii_name, &exid->nii_name, GFP_KERNEL); | |
3268 | if (!clp->cl_nii_name.data) | |
3269 | return nfserr_jukebox; | |
e29f4703 | 3270 | clp->cl_nii_time = exid->nii_time; |
79123444 BF |
3271 | return 0; |
3272 | } | |
3273 | ||
069b6ad4 | 3274 | __be32 |
eb69853d CH |
3275 | nfsd4_exchange_id(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3276 | union nfsd4_op_u *u) | |
069b6ad4 | 3277 | { |
eb69853d | 3278 | struct nfsd4_exchange_id *exid = &u->exchange_id; |
3dbacee6 TM |
3279 | struct nfs4_client *conf, *new; |
3280 | struct nfs4_client *unconf = NULL; | |
57b7b43b | 3281 | __be32 status; |
363168b4 | 3282 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 3283 | nfs4_verifier verf = exid->verifier; |
363168b4 | 3284 | struct sockaddr *sa = svc_addr(rqstp); |
83e08fd4 | 3285 | bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; |
c212cecf | 3286 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
0733d213 | 3287 | |
363168b4 | 3288 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 3289 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
523ec6ed | 3290 | "ip_addr=%s flags %x, spa_how %u\n", |
0733d213 | 3291 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 3292 | addr_str, exid->flags, exid->spa_how); |
0733d213 | 3293 | |
a084daf5 | 3294 | if (exid->flags & ~EXCHGID4_FLAG_MASK_A) |
0733d213 AA |
3295 | return nfserr_inval; |
3296 | ||
50c7b948 BF |
3297 | new = create_client(exid->clname, rqstp, &verf); |
3298 | if (new == NULL) | |
3299 | return nfserr_jukebox; | |
79123444 BF |
3300 | status = copy_impl_id(new, exid); |
3301 | if (status) | |
3302 | goto out_nolock; | |
50c7b948 | 3303 | |
0733d213 | 3304 | switch (exid->spa_how) { |
57266a6e | 3305 | case SP4_MACH_CRED: |
ed941643 AE |
3306 | exid->spo_must_enforce[0] = 0; |
3307 | exid->spo_must_enforce[1] = ( | |
3308 | 1 << (OP_BIND_CONN_TO_SESSION - 32) | | |
3309 | 1 << (OP_EXCHANGE_ID - 32) | | |
3310 | 1 << (OP_CREATE_SESSION - 32) | | |
3311 | 1 << (OP_DESTROY_SESSION - 32) | | |
3312 | 1 << (OP_DESTROY_CLIENTID - 32)); | |
3313 | ||
3314 | exid->spo_must_allow[0] &= (1 << (OP_CLOSE) | | |
3315 | 1 << (OP_OPEN_DOWNGRADE) | | |
3316 | 1 << (OP_LOCKU) | | |
3317 | 1 << (OP_DELEGRETURN)); | |
3318 | ||
3319 | exid->spo_must_allow[1] &= ( | |
3320 | 1 << (OP_TEST_STATEID - 32) | | |
3321 | 1 << (OP_FREE_STATEID - 32)); | |
50c7b948 BF |
3322 | if (!svc_rqst_integrity_protected(rqstp)) { |
3323 | status = nfserr_inval; | |
3324 | goto out_nolock; | |
920dd9bb BF |
3325 | } |
3326 | /* | |
3327 | * Sometimes userspace doesn't give us a principal. | |
3328 | * Which is a bug, really. Anyway, we can't enforce | |
3329 | * MACH_CRED in that case, better to give up now: | |
3330 | */ | |
414ca017 BF |
3331 | if (!new->cl_cred.cr_principal && |
3332 | !new->cl_cred.cr_raw_principal) { | |
920dd9bb BF |
3333 | status = nfserr_serverfault; |
3334 | goto out_nolock; | |
50c7b948 BF |
3335 | } |
3336 | new->cl_mach_cred = true; | |
76c50eb7 | 3337 | break; |
0733d213 AA |
3338 | case SP4_NONE: |
3339 | break; | |
063b0fb9 BF |
3340 | default: /* checked by xdr code */ |
3341 | WARN_ON_ONCE(1); | |
df561f66 | 3342 | fallthrough; |
0733d213 | 3343 | case SP4_SSV: |
8edf4b02 KM |
3344 | status = nfserr_encr_alg_unsupp; |
3345 | goto out_nolock; | |
0733d213 AA |
3346 | } |
3347 | ||
2dbb269d | 3348 | /* Cases below refer to rfc 5661 section 18.35.4: */ |
3dbacee6 | 3349 | spin_lock(&nn->client_lock); |
382a62e7 | 3350 | conf = find_confirmed_client_by_name(&exid->clname, nn); |
0733d213 | 3351 | if (conf) { |
83e08fd4 BF |
3352 | bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); |
3353 | bool verfs_match = same_verf(&verf, &conf->cl_verifier); | |
3354 | ||
136e658d BF |
3355 | if (update) { |
3356 | if (!clp_used_exchangeid(conf)) { /* buggy client */ | |
2dbb269d | 3357 | status = nfserr_inval; |
1a308118 BF |
3358 | goto out; |
3359 | } | |
dedeb13f | 3360 | if (!nfsd4_mach_creds_match(conf, rqstp)) { |
57266a6e BF |
3361 | status = nfserr_wrong_cred; |
3362 | goto out; | |
3363 | } | |
136e658d | 3364 | if (!creds_match) { /* case 9 */ |
ea236d07 | 3365 | status = nfserr_perm; |
136e658d BF |
3366 | goto out; |
3367 | } | |
3368 | if (!verfs_match) { /* case 8 */ | |
0733d213 AA |
3369 | status = nfserr_not_same; |
3370 | goto out; | |
3371 | } | |
136e658d BF |
3372 | /* case 6 */ |
3373 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
e8f80c55 | 3374 | trace_nfsd_clid_confirmed_r(conf); |
136e658d | 3375 | goto out_copy; |
0733d213 | 3376 | } |
136e658d | 3377 | if (!creds_match) { /* case 3 */ |
631fc9ea BF |
3378 | if (client_has_state(conf)) { |
3379 | status = nfserr_clid_inuse; | |
27787733 | 3380 | trace_nfsd_clid_cred_mismatch(conf, rqstp); |
0733d213 AA |
3381 | goto out; |
3382 | } | |
0733d213 AA |
3383 | goto out_new; |
3384 | } | |
136e658d | 3385 | if (verfs_match) { /* case 2 */ |
0f1ba0ef | 3386 | conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; |
e8f80c55 | 3387 | trace_nfsd_clid_confirmed_r(conf); |
136e658d BF |
3388 | goto out_copy; |
3389 | } | |
3390 | /* case 5, client reboot */ | |
744ea54c | 3391 | trace_nfsd_clid_verf_mismatch(conf, rqstp, &verf); |
3dbacee6 | 3392 | conf = NULL; |
136e658d | 3393 | goto out_new; |
6ddbbbfe MS |
3394 | } |
3395 | ||
2dbb269d | 3396 | if (update) { /* case 7 */ |
6ddbbbfe MS |
3397 | status = nfserr_noent; |
3398 | goto out; | |
0733d213 AA |
3399 | } |
3400 | ||
e8f80c55 | 3401 | unconf = find_unconfirmed_client_by_name(&exid->clname, nn); |
2dbb269d | 3402 | if (unconf) /* case 4, possible retry or client restart */ |
3dbacee6 | 3403 | unhash_client_locked(unconf); |
0733d213 | 3404 | |
e8f80c55 CL |
3405 | /* case 1, new owner ID */ |
3406 | trace_nfsd_clid_fresh(new); | |
3407 | ||
0733d213 | 3408 | out_new: |
fd699b8a JL |
3409 | if (conf) { |
3410 | status = mark_client_expired_locked(conf); | |
3411 | if (status) | |
3412 | goto out; | |
2958d2ee | 3413 | trace_nfsd_clid_replaced(&conf->cl_clientid); |
fd699b8a | 3414 | } |
4f540e29 | 3415 | new->cl_minorversion = cstate->minorversion; |
ed941643 AE |
3416 | new->cl_spo_must_allow.u.words[0] = exid->spo_must_allow[0]; |
3417 | new->cl_spo_must_allow.u.words[1] = exid->spo_must_allow[1]; | |
0733d213 | 3418 | |
ac55fdc4 | 3419 | add_to_unconfirmed(new); |
3dbacee6 | 3420 | swap(new, conf); |
0733d213 | 3421 | out_copy: |
5cc40fd7 TM |
3422 | exid->clientid.cl_boot = conf->cl_clientid.cl_boot; |
3423 | exid->clientid.cl_id = conf->cl_clientid.cl_id; | |
0733d213 | 3424 | |
5cc40fd7 TM |
3425 | exid->seqid = conf->cl_cs_slot.sl_seqid + 1; |
3426 | nfsd4_set_ex_flags(conf, exid); | |
0733d213 AA |
3427 | |
3428 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
5cc40fd7 | 3429 | conf->cl_cs_slot.sl_seqid, conf->cl_exchange_flags); |
0733d213 AA |
3430 | status = nfs_ok; |
3431 | ||
3432 | out: | |
3dbacee6 | 3433 | spin_unlock(&nn->client_lock); |
50c7b948 | 3434 | out_nolock: |
5cc40fd7 | 3435 | if (new) |
3dbacee6 | 3436 | expire_client(new); |
e8f80c55 CL |
3437 | if (unconf) { |
3438 | trace_nfsd_clid_expire_unconf(&unconf->cl_clientid); | |
3dbacee6 | 3439 | expire_client(unconf); |
e8f80c55 | 3440 | } |
0733d213 | 3441 | return status; |
069b6ad4 AA |
3442 | } |
3443 | ||
57b7b43b | 3444 | static __be32 |
88e588d5 | 3445 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 3446 | { |
88e588d5 AA |
3447 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
3448 | slot_seqid); | |
b85d4c01 BH |
3449 | |
3450 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
3451 | if (slot_inuse) { |
3452 | if (seqid == slot_seqid) | |
b85d4c01 BH |
3453 | return nfserr_jukebox; |
3454 | else | |
3455 | return nfserr_seq_misordered; | |
3456 | } | |
f6d82485 | 3457 | /* Note unsigned 32-bit arithmetic handles wraparound: */ |
88e588d5 | 3458 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 | 3459 | return nfs_ok; |
88e588d5 | 3460 | if (seqid == slot_seqid) |
b85d4c01 | 3461 | return nfserr_replay_cache; |
b85d4c01 BH |
3462 | return nfserr_seq_misordered; |
3463 | } | |
3464 | ||
49557cc7 AA |
3465 | /* |
3466 | * Cache the create session result into the create session single DRC | |
3467 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
3468 | * Do this for solo or embedded create session operations. | |
3469 | */ | |
3470 | static void | |
3471 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
57b7b43b | 3472 | struct nfsd4_clid_slot *slot, __be32 nfserr) |
49557cc7 AA |
3473 | { |
3474 | slot->sl_status = nfserr; | |
3475 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
3476 | } | |
3477 | ||
3478 | static __be32 | |
3479 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
3480 | struct nfsd4_clid_slot *slot) | |
3481 | { | |
3482 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
3483 | return slot->sl_status; | |
3484 | } | |
3485 | ||
1b74c25b MJ |
3486 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
3487 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
3488 | 1 + /* MIN tag is length with zero, only length */ \ | |
3489 | 3 + /* version, opcount, opcode */ \ | |
3490 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
3491 | /* seqid, slotID, slotID, cache */ \ | |
3492 | 4 ) * sizeof(__be32)) | |
3493 | ||
3494 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
3495 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
3496 | 1 + /* status */ \ | |
3497 | 1 + /* MIN tag is length with zero, only length */ \ | |
3498 | 3 + /* opcount, opcode, opstatus*/ \ | |
3499 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
3500 | /* seqid, slotID, slotID, slotID, status */ \ | |
3501 | 5 ) * sizeof(__be32)) | |
3502 | ||
55c760cf | 3503 | static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs *ca, struct nfsd_net *nn) |
1b74c25b | 3504 | { |
55c760cf BF |
3505 | u32 maxrpc = nn->nfsd_serv->sv_max_mesg; |
3506 | ||
373cd409 BF |
3507 | if (ca->maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ) |
3508 | return nfserr_toosmall; | |
3509 | if (ca->maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ) | |
3510 | return nfserr_toosmall; | |
55c760cf BF |
3511 | ca->headerpadsz = 0; |
3512 | ca->maxreq_sz = min_t(u32, ca->maxreq_sz, maxrpc); | |
3513 | ca->maxresp_sz = min_t(u32, ca->maxresp_sz, maxrpc); | |
3514 | ca->maxops = min_t(u32, ca->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
3515 | ca->maxresp_cached = min_t(u32, ca->maxresp_cached, | |
3516 | NFSD_SLOT_CACHE_SIZE + NFSD_MIN_HDR_SEQ_SZ); | |
3517 | ca->maxreqs = min_t(u32, ca->maxreqs, NFSD_MAX_SLOTS_PER_SESSION); | |
3518 | /* | |
3519 | * Note decreasing slot size below client's request may make it | |
3520 | * difficult for client to function correctly, whereas | |
3521 | * decreasing the number of slots will (just?) affect | |
3522 | * performance. When short on memory we therefore prefer to | |
3523 | * decrease number of slots instead of their size. Clients that | |
3524 | * request larger slots than they need will get poor results: | |
7f49fd5d N |
3525 | * Note that we always allow at least one slot, because our |
3526 | * accounting is soft and provides no guarantees either way. | |
55c760cf | 3527 | */ |
2030ca56 | 3528 | ca->maxreqs = nfsd4_get_drc_mem(ca, nn); |
55c760cf | 3529 | |
373cd409 | 3530 | return nfs_ok; |
1b74c25b MJ |
3531 | } |
3532 | ||
4500632f CL |
3533 | /* |
3534 | * Server's NFSv4.1 backchannel support is AUTH_SYS-only for now. | |
3535 | * These are based on similar macros in linux/sunrpc/msg_prot.h . | |
3536 | */ | |
3537 | #define RPC_MAX_HEADER_WITH_AUTH_SYS \ | |
3538 | (RPC_CALLHDRSIZE + 2 * (2 + UNX_CALLSLACK)) | |
3539 | ||
3540 | #define RPC_MAX_REPHEADER_WITH_AUTH_SYS \ | |
3541 | (RPC_REPHDRSIZE + (2 + NUL_REPLYSLACK)) | |
3542 | ||
8a891633 | 3543 | #define NFSD_CB_MAX_REQ_SZ ((NFS4_enc_cb_recall_sz + \ |
4500632f | 3544 | RPC_MAX_HEADER_WITH_AUTH_SYS) * sizeof(__be32)) |
8a891633 | 3545 | #define NFSD_CB_MAX_RESP_SZ ((NFS4_dec_cb_recall_sz + \ |
4500632f CL |
3546 | RPC_MAX_REPHEADER_WITH_AUTH_SYS) * \ |
3547 | sizeof(__be32)) | |
8a891633 | 3548 | |
06b332a5 | 3549 | static __be32 check_backchannel_attrs(struct nfsd4_channel_attrs *ca) |
1b74c25b | 3550 | { |
06b332a5 BF |
3551 | ca->headerpadsz = 0; |
3552 | ||
8a891633 | 3553 | if (ca->maxreq_sz < NFSD_CB_MAX_REQ_SZ) |
06b332a5 | 3554 | return nfserr_toosmall; |
8a891633 | 3555 | if (ca->maxresp_sz < NFSD_CB_MAX_RESP_SZ) |
06b332a5 BF |
3556 | return nfserr_toosmall; |
3557 | ca->maxresp_cached = 0; | |
3558 | if (ca->maxops < 2) | |
3559 | return nfserr_toosmall; | |
3560 | ||
3561 | return nfs_ok; | |
1b74c25b MJ |
3562 | } |
3563 | ||
b78724b7 BF |
3564 | static __be32 nfsd4_check_cb_sec(struct nfsd4_cb_sec *cbs) |
3565 | { | |
3566 | switch (cbs->flavor) { | |
3567 | case RPC_AUTH_NULL: | |
3568 | case RPC_AUTH_UNIX: | |
3569 | return nfs_ok; | |
3570 | default: | |
3571 | /* | |
3572 | * GSS case: the spec doesn't allow us to return this | |
3573 | * error. But it also doesn't allow us not to support | |
3574 | * GSS. | |
3575 | * I'd rather this fail hard than return some error the | |
3576 | * client might think it can already handle: | |
3577 | */ | |
3578 | return nfserr_encr_alg_unsupp; | |
3579 | } | |
3580 | } | |
3581 | ||
069b6ad4 AA |
3582 | __be32 |
3583 | nfsd4_create_session(struct svc_rqst *rqstp, | |
eb69853d | 3584 | struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) |
069b6ad4 | 3585 | { |
eb69853d | 3586 | struct nfsd4_create_session *cr_ses = &u->create_session; |
363168b4 | 3587 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 3588 | struct nfs4_client *conf, *unconf; |
d20c11d8 | 3589 | struct nfs4_client *old = NULL; |
ac7c46f2 | 3590 | struct nfsd4_session *new; |
81f0b2a4 | 3591 | struct nfsd4_conn *conn; |
49557cc7 | 3592 | struct nfsd4_clid_slot *cs_slot = NULL; |
57b7b43b | 3593 | __be32 status = 0; |
8daae4dc | 3594 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
ec6b5d7b | 3595 | |
a62573dc MJ |
3596 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
3597 | return nfserr_inval; | |
b78724b7 BF |
3598 | status = nfsd4_check_cb_sec(&cr_ses->cb_sec); |
3599 | if (status) | |
3600 | return status; | |
55c760cf | 3601 | status = check_forechannel_attrs(&cr_ses->fore_channel, nn); |
06b332a5 BF |
3602 | if (status) |
3603 | return status; | |
3604 | status = check_backchannel_attrs(&cr_ses->back_channel); | |
373cd409 | 3605 | if (status) |
f403e450 | 3606 | goto out_release_drc_mem; |
81f0b2a4 | 3607 | status = nfserr_jukebox; |
60810e54 | 3608 | new = alloc_session(&cr_ses->fore_channel, &cr_ses->back_channel); |
55c760cf BF |
3609 | if (!new) |
3610 | goto out_release_drc_mem; | |
81f0b2a4 BF |
3611 | conn = alloc_conn_from_crses(rqstp, cr_ses); |
3612 | if (!conn) | |
3613 | goto out_free_session; | |
a62573dc | 3614 | |
d20c11d8 | 3615 | spin_lock(&nn->client_lock); |
0a7ec377 | 3616 | unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn); |
8daae4dc | 3617 | conf = find_confirmed_client(&cr_ses->clientid, true, nn); |
78389046 | 3618 | WARN_ON_ONCE(conf && unconf); |
ec6b5d7b AA |
3619 | |
3620 | if (conf) { | |
57266a6e | 3621 | status = nfserr_wrong_cred; |
dedeb13f | 3622 | if (!nfsd4_mach_creds_match(conf, rqstp)) |
57266a6e | 3623 | goto out_free_conn; |
49557cc7 AA |
3624 | cs_slot = &conf->cl_cs_slot; |
3625 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
f5e22bb6 KM |
3626 | if (status) { |
3627 | if (status == nfserr_replay_cache) | |
3628 | status = nfsd4_replay_create_session(cr_ses, cs_slot); | |
81f0b2a4 | 3629 | goto out_free_conn; |
ec6b5d7b | 3630 | } |
ec6b5d7b | 3631 | } else if (unconf) { |
27787733 | 3632 | status = nfserr_clid_inuse; |
ec6b5d7b | 3633 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || |
363168b4 | 3634 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
27787733 | 3635 | trace_nfsd_clid_cred_mismatch(unconf, rqstp); |
81f0b2a4 | 3636 | goto out_free_conn; |
ec6b5d7b | 3637 | } |
57266a6e | 3638 | status = nfserr_wrong_cred; |
dedeb13f | 3639 | if (!nfsd4_mach_creds_match(unconf, rqstp)) |
57266a6e | 3640 | goto out_free_conn; |
49557cc7 AA |
3641 | cs_slot = &unconf->cl_cs_slot; |
3642 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
3643 | if (status) { |
3644 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 3645 | status = nfserr_seq_misordered; |
81f0b2a4 | 3646 | goto out_free_conn; |
ec6b5d7b | 3647 | } |
382a62e7 | 3648 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
221a6876 | 3649 | if (old) { |
d20c11d8 | 3650 | status = mark_client_expired_locked(old); |
7abea1e8 JL |
3651 | if (status) { |
3652 | old = NULL; | |
221a6876 | 3653 | goto out_free_conn; |
7abea1e8 | 3654 | } |
2958d2ee | 3655 | trace_nfsd_clid_replaced(&old->cl_clientid); |
221a6876 | 3656 | } |
8f9d3d3b | 3657 | move_to_confirmed(unconf); |
ec6b5d7b AA |
3658 | conf = unconf; |
3659 | } else { | |
3660 | status = nfserr_stale_clientid; | |
81f0b2a4 | 3661 | goto out_free_conn; |
ec6b5d7b | 3662 | } |
81f0b2a4 | 3663 | status = nfs_ok; |
4ce85c8c | 3664 | /* Persistent sessions are not supported */ |
408b79bc | 3665 | cr_ses->flags &= ~SESSION4_PERSIST; |
4ce85c8c | 3666 | /* Upshifting from TCP to RDMA is not supported */ |
408b79bc BF |
3667 | cr_ses->flags &= ~SESSION4_RDMA; |
3668 | ||
81f0b2a4 | 3669 | init_session(rqstp, new, conf, cr_ses); |
d20c11d8 | 3670 | nfsd4_get_session_locked(new); |
81f0b2a4 | 3671 | |
ac7c46f2 | 3672 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, |
ec6b5d7b | 3673 | NFS4_MAX_SESSIONID_LEN); |
86c3e16c | 3674 | cs_slot->sl_seqid++; |
49557cc7 | 3675 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 3676 | |
d20c11d8 | 3677 | /* cache solo and embedded create sessions under the client_lock */ |
49557cc7 | 3678 | nfsd4_cache_create_session(cr_ses, cs_slot, status); |
d20c11d8 | 3679 | spin_unlock(&nn->client_lock); |
934bd07f BF |
3680 | if (conf == unconf) |
3681 | fsnotify_dentry(conf->cl_nfsd_info_dentry, FS_MODIFY); | |
d20c11d8 JL |
3682 | /* init connection and backchannel */ |
3683 | nfsd4_init_conn(rqstp, conn, new); | |
3684 | nfsd4_put_session(new); | |
d20c11d8 JL |
3685 | if (old) |
3686 | expire_client(old); | |
ec6b5d7b | 3687 | return status; |
81f0b2a4 | 3688 | out_free_conn: |
d20c11d8 | 3689 | spin_unlock(&nn->client_lock); |
81f0b2a4 | 3690 | free_conn(conn); |
d20c11d8 JL |
3691 | if (old) |
3692 | expire_client(old); | |
81f0b2a4 BF |
3693 | out_free_session: |
3694 | __free_session(new); | |
55c760cf BF |
3695 | out_release_drc_mem: |
3696 | nfsd4_put_drc_mem(&cr_ses->fore_channel); | |
1ca50792 | 3697 | return status; |
069b6ad4 AA |
3698 | } |
3699 | ||
1d1bc8f2 BF |
3700 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
3701 | { | |
3702 | switch (*dir) { | |
3703 | case NFS4_CDFC4_FORE: | |
3704 | case NFS4_CDFC4_BACK: | |
3705 | return nfs_ok; | |
3706 | case NFS4_CDFC4_FORE_OR_BOTH: | |
3707 | case NFS4_CDFC4_BACK_OR_BOTH: | |
3708 | *dir = NFS4_CDFC4_BOTH; | |
3709 | return nfs_ok; | |
fc5fc5d7 | 3710 | } |
1d1bc8f2 BF |
3711 | return nfserr_inval; |
3712 | } | |
3713 | ||
eb69853d CH |
3714 | __be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, |
3715 | struct nfsd4_compound_state *cstate, | |
3716 | union nfsd4_op_u *u) | |
cb73a9f4 | 3717 | { |
eb69853d | 3718 | struct nfsd4_backchannel_ctl *bc = &u->backchannel_ctl; |
cb73a9f4 | 3719 | struct nfsd4_session *session = cstate->session; |
c9a49628 | 3720 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
b78724b7 | 3721 | __be32 status; |
cb73a9f4 | 3722 | |
b78724b7 BF |
3723 | status = nfsd4_check_cb_sec(&bc->bc_cb_sec); |
3724 | if (status) | |
3725 | return status; | |
c9a49628 | 3726 | spin_lock(&nn->client_lock); |
cb73a9f4 BF |
3727 | session->se_cb_prog = bc->bc_cb_program; |
3728 | session->se_cb_sec = bc->bc_cb_sec; | |
c9a49628 | 3729 | spin_unlock(&nn->client_lock); |
cb73a9f4 BF |
3730 | |
3731 | nfsd4_probe_callback(session->se_client); | |
3732 | ||
3733 | return nfs_ok; | |
3734 | } | |
3735 | ||
c2d715a1 BF |
3736 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
3737 | { | |
3738 | struct nfsd4_conn *c; | |
3739 | ||
3740 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
3741 | if (c->cn_xprt == xpt) { | |
3742 | return c; | |
3743 | } | |
3744 | } | |
3745 | return NULL; | |
3746 | } | |
3747 | ||
3748 | static __be32 nfsd4_match_existing_connection(struct svc_rqst *rqst, | |
02579b2f | 3749 | struct nfsd4_session *session, u32 req, struct nfsd4_conn **conn) |
c2d715a1 BF |
3750 | { |
3751 | struct nfs4_client *clp = session->se_client; | |
3752 | struct svc_xprt *xpt = rqst->rq_xprt; | |
3753 | struct nfsd4_conn *c; | |
3754 | __be32 status; | |
3755 | ||
3756 | /* Following the last paragraph of RFC 5661 Section 18.34.3: */ | |
3757 | spin_lock(&clp->cl_lock); | |
3758 | c = __nfsd4_find_conn(xpt, session); | |
3759 | if (!c) | |
3760 | status = nfserr_noent; | |
3761 | else if (req == c->cn_flags) | |
3762 | status = nfs_ok; | |
3763 | else if (req == NFS4_CDFC4_FORE_OR_BOTH && | |
3764 | c->cn_flags != NFS4_CDFC4_BACK) | |
3765 | status = nfs_ok; | |
3766 | else if (req == NFS4_CDFC4_BACK_OR_BOTH && | |
3767 | c->cn_flags != NFS4_CDFC4_FORE) | |
3768 | status = nfs_ok; | |
3769 | else | |
3770 | status = nfserr_inval; | |
3771 | spin_unlock(&clp->cl_lock); | |
02579b2f DN |
3772 | if (status == nfs_ok && conn) |
3773 | *conn = c; | |
c2d715a1 BF |
3774 | return status; |
3775 | } | |
3776 | ||
1d1bc8f2 BF |
3777 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, |
3778 | struct nfsd4_compound_state *cstate, | |
eb69853d | 3779 | union nfsd4_op_u *u) |
1d1bc8f2 | 3780 | { |
eb69853d | 3781 | struct nfsd4_bind_conn_to_session *bcts = &u->bind_conn_to_session; |
1d1bc8f2 | 3782 | __be32 status; |
3ba63671 | 3783 | struct nfsd4_conn *conn; |
4f6e6c17 | 3784 | struct nfsd4_session *session; |
d4e19e70 TM |
3785 | struct net *net = SVC_NET(rqstp); |
3786 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1d1bc8f2 BF |
3787 | |
3788 | if (!nfsd4_last_compound_op(rqstp)) | |
3789 | return nfserr_not_only_op; | |
c9a49628 | 3790 | spin_lock(&nn->client_lock); |
d4e19e70 | 3791 | session = find_in_sessionid_hashtbl(&bcts->sessionid, net, &status); |
c9a49628 | 3792 | spin_unlock(&nn->client_lock); |
4f6e6c17 | 3793 | if (!session) |
d4e19e70 | 3794 | goto out_no_session; |
57266a6e | 3795 | status = nfserr_wrong_cred; |
dedeb13f | 3796 | if (!nfsd4_mach_creds_match(session->se_client, rqstp)) |
57266a6e | 3797 | goto out; |
02579b2f DN |
3798 | status = nfsd4_match_existing_connection(rqstp, session, |
3799 | bcts->dir, &conn); | |
3800 | if (status == nfs_ok) { | |
3801 | if (bcts->dir == NFS4_CDFC4_FORE_OR_BOTH || | |
3802 | bcts->dir == NFS4_CDFC4_BACK) | |
3803 | conn->cn_flags |= NFS4_CDFC4_BACK; | |
3804 | nfsd4_probe_callback(session->se_client); | |
3805 | goto out; | |
3806 | } | |
3807 | if (status == nfserr_inval) | |
c2d715a1 | 3808 | goto out; |
1d1bc8f2 | 3809 | status = nfsd4_map_bcts_dir(&bcts->dir); |
3ba63671 | 3810 | if (status) |
4f6e6c17 | 3811 | goto out; |
3ba63671 | 3812 | conn = alloc_conn(rqstp, bcts->dir); |
4f6e6c17 | 3813 | status = nfserr_jukebox; |
3ba63671 | 3814 | if (!conn) |
4f6e6c17 BF |
3815 | goto out; |
3816 | nfsd4_init_conn(rqstp, conn, session); | |
3817 | status = nfs_ok; | |
3818 | out: | |
d4e19e70 TM |
3819 | nfsd4_put_session(session); |
3820 | out_no_session: | |
4f6e6c17 | 3821 | return status; |
1d1bc8f2 BF |
3822 | } |
3823 | ||
665d5072 | 3824 | static bool nfsd4_compound_in_session(struct nfsd4_compound_state *cstate, struct nfs4_sessionid *sid) |
5d4cec2f | 3825 | { |
665d5072 | 3826 | if (!cstate->session) |
51d87bc2 | 3827 | return false; |
665d5072 | 3828 | return !memcmp(sid, &cstate->session->se_sessionid, sizeof(*sid)); |
5d4cec2f BF |
3829 | } |
3830 | ||
069b6ad4 | 3831 | __be32 |
eb69853d CH |
3832 | nfsd4_destroy_session(struct svc_rqst *r, struct nfsd4_compound_state *cstate, |
3833 | union nfsd4_op_u *u) | |
069b6ad4 | 3834 | { |
ca0552f4 | 3835 | struct nfs4_sessionid *sessionid = &u->destroy_session.sessionid; |
e10e0cfc | 3836 | struct nfsd4_session *ses; |
abcdff09 | 3837 | __be32 status; |
f0f51f5c | 3838 | int ref_held_by_me = 0; |
d4e19e70 TM |
3839 | struct net *net = SVC_NET(r); |
3840 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
e10e0cfc | 3841 | |
abcdff09 | 3842 | status = nfserr_not_only_op; |
ca0552f4 | 3843 | if (nfsd4_compound_in_session(cstate, sessionid)) { |
57716355 | 3844 | if (!nfsd4_last_compound_op(r)) |
abcdff09 | 3845 | goto out; |
f0f51f5c | 3846 | ref_held_by_me++; |
57716355 | 3847 | } |
ca0552f4 | 3848 | dump_sessionid(__func__, sessionid); |
c9a49628 | 3849 | spin_lock(&nn->client_lock); |
ca0552f4 | 3850 | ses = find_in_sessionid_hashtbl(sessionid, net, &status); |
abcdff09 BF |
3851 | if (!ses) |
3852 | goto out_client_lock; | |
57266a6e | 3853 | status = nfserr_wrong_cred; |
dedeb13f | 3854 | if (!nfsd4_mach_creds_match(ses->se_client, r)) |
d4e19e70 | 3855 | goto out_put_session; |
f0f51f5c | 3856 | status = mark_session_dead_locked(ses, 1 + ref_held_by_me); |
66b2b9b2 | 3857 | if (status) |
f0f51f5c | 3858 | goto out_put_session; |
e10e0cfc | 3859 | unhash_session(ses); |
c9a49628 | 3860 | spin_unlock(&nn->client_lock); |
e10e0cfc | 3861 | |
84f5f7cc | 3862 | nfsd4_probe_callback_sync(ses->se_client); |
19cf5c02 | 3863 | |
c9a49628 | 3864 | spin_lock(&nn->client_lock); |
e10e0cfc | 3865 | status = nfs_ok; |
f0f51f5c | 3866 | out_put_session: |
d4e19e70 | 3867 | nfsd4_put_session_locked(ses); |
abcdff09 BF |
3868 | out_client_lock: |
3869 | spin_unlock(&nn->client_lock); | |
e10e0cfc | 3870 | out: |
e10e0cfc | 3871 | return status; |
069b6ad4 AA |
3872 | } |
3873 | ||
57266a6e | 3874 | static __be32 nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
3875 | { |
3876 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 3877 | struct nfsd4_conn *c; |
57266a6e | 3878 | __be32 status = nfs_ok; |
21b75b01 | 3879 | int ret; |
328ead28 BF |
3880 | |
3881 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 3882 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
57266a6e BF |
3883 | if (c) |
3884 | goto out_free; | |
3885 | status = nfserr_conn_not_bound_to_session; | |
3886 | if (clp->cl_mach_cred) | |
3887 | goto out_free; | |
328ead28 BF |
3888 | __nfsd4_hash_conn(new, ses); |
3889 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
3890 | ret = nfsd4_register_conn(new); |
3891 | if (ret) | |
3892 | /* oops; xprt is already down: */ | |
3893 | nfsd4_conn_lost(&new->cn_xpt_user); | |
57266a6e BF |
3894 | return nfs_ok; |
3895 | out_free: | |
3896 | spin_unlock(&clp->cl_lock); | |
3897 | free_conn(new); | |
3898 | return status; | |
328ead28 BF |
3899 | } |
3900 | ||
868b89c3 MJ |
3901 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
3902 | { | |
3903 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
3904 | ||
3905 | return args->opcnt > session->se_fchannel.maxops; | |
3906 | } | |
3907 | ||
ae82a8d0 MJ |
3908 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
3909 | struct nfsd4_session *session) | |
3910 | { | |
3911 | struct xdr_buf *xb = &rqstp->rq_arg; | |
3912 | ||
3913 | return xb->len > session->se_fchannel.maxreq_sz; | |
3914 | } | |
3915 | ||
53da6a53 BF |
3916 | static bool replay_matches_cache(struct svc_rqst *rqstp, |
3917 | struct nfsd4_sequence *seq, struct nfsd4_slot *slot) | |
3918 | { | |
3919 | struct nfsd4_compoundargs *argp = rqstp->rq_argp; | |
3920 | ||
3921 | if ((bool)(slot->sl_flags & NFSD4_SLOT_CACHETHIS) != | |
3922 | (bool)seq->cachethis) | |
3923 | return false; | |
3924 | /* | |
6e73e92b SM |
3925 | * If there's an error then the reply can have fewer ops than |
3926 | * the call. | |
53da6a53 | 3927 | */ |
6e73e92b SM |
3928 | if (slot->sl_opcnt < argp->opcnt && !slot->sl_status) |
3929 | return false; | |
3930 | /* | |
3931 | * But if we cached a reply with *more* ops than the call you're | |
3932 | * sending us now, then this new call is clearly not really a | |
3933 | * replay of the old one: | |
3934 | */ | |
3935 | if (slot->sl_opcnt > argp->opcnt) | |
53da6a53 BF |
3936 | return false; |
3937 | /* This is the only check explicitly called by spec: */ | |
3938 | if (!same_creds(&rqstp->rq_cred, &slot->sl_cred)) | |
3939 | return false; | |
3940 | /* | |
3941 | * There may be more comparisons we could actually do, but the | |
3942 | * spec doesn't require us to catch every case where the calls | |
3943 | * don't match (that would require caching the call as well as | |
3944 | * the reply), so we don't bother. | |
3945 | */ | |
3946 | return true; | |
3947 | } | |
3948 | ||
069b6ad4 | 3949 | __be32 |
eb69853d CH |
3950 | nfsd4_sequence(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3951 | union nfsd4_op_u *u) | |
069b6ad4 | 3952 | { |
eb69853d | 3953 | struct nfsd4_sequence *seq = &u->sequence; |
f9bb94c4 | 3954 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
bddfdbcd | 3955 | struct xdr_stream *xdr = resp->xdr; |
b85d4c01 | 3956 | struct nfsd4_session *session; |
221a6876 | 3957 | struct nfs4_client *clp; |
b85d4c01 | 3958 | struct nfsd4_slot *slot; |
a663bdd8 | 3959 | struct nfsd4_conn *conn; |
57b7b43b | 3960 | __be32 status; |
47ee5298 | 3961 | int buflen; |
d4e19e70 TM |
3962 | struct net *net = SVC_NET(rqstp); |
3963 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
b85d4c01 | 3964 | |
f9bb94c4 AA |
3965 | if (resp->opcnt != 1) |
3966 | return nfserr_sequence_pos; | |
3967 | ||
a663bdd8 BF |
3968 | /* |
3969 | * Will be either used or freed by nfsd4_sequence_check_conn | |
3970 | * below. | |
3971 | */ | |
3972 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
3973 | if (!conn) | |
3974 | return nfserr_jukebox; | |
3975 | ||
c9a49628 | 3976 | spin_lock(&nn->client_lock); |
d4e19e70 | 3977 | session = find_in_sessionid_hashtbl(&seq->sessionid, net, &status); |
b85d4c01 | 3978 | if (!session) |
221a6876 BF |
3979 | goto out_no_session; |
3980 | clp = session->se_client; | |
b85d4c01 | 3981 | |
868b89c3 MJ |
3982 | status = nfserr_too_many_ops; |
3983 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
66b2b9b2 | 3984 | goto out_put_session; |
868b89c3 | 3985 | |
ae82a8d0 MJ |
3986 | status = nfserr_req_too_big; |
3987 | if (nfsd4_request_too_big(rqstp, session)) | |
66b2b9b2 | 3988 | goto out_put_session; |
ae82a8d0 | 3989 | |
b85d4c01 | 3990 | status = nfserr_badslot; |
6c18ba9f | 3991 | if (seq->slotid >= session->se_fchannel.maxreqs) |
66b2b9b2 | 3992 | goto out_put_session; |
b85d4c01 | 3993 | |
557ce264 | 3994 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
3995 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
3996 | ||
a8dfdaeb AA |
3997 | /* We do not negotiate the number of slots yet, so set the |
3998 | * maxslots to the session maxreqs which is used to encode | |
3999 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
4000 | seq->maxslots = session->se_fchannel.maxreqs; | |
4001 | ||
73e79482 BF |
4002 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, |
4003 | slot->sl_flags & NFSD4_SLOT_INUSE); | |
b85d4c01 | 4004 | if (status == nfserr_replay_cache) { |
bf5c43c8 BF |
4005 | status = nfserr_seq_misordered; |
4006 | if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) | |
66b2b9b2 | 4007 | goto out_put_session; |
53da6a53 BF |
4008 | status = nfserr_seq_false_retry; |
4009 | if (!replay_matches_cache(rqstp, seq, slot)) | |
4010 | goto out_put_session; | |
b85d4c01 BH |
4011 | cstate->slot = slot; |
4012 | cstate->session = session; | |
4b24ca7d | 4013 | cstate->clp = clp; |
da3846a2 | 4014 | /* Return the cached reply status and set cstate->status |
557ce264 | 4015 | * for nfsd4_proc_compound processing */ |
bf864a31 | 4016 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 4017 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 4018 | goto out; |
b85d4c01 BH |
4019 | } |
4020 | if (status) | |
66b2b9b2 | 4021 | goto out_put_session; |
b85d4c01 | 4022 | |
57266a6e | 4023 | status = nfsd4_sequence_check_conn(conn, session); |
a663bdd8 | 4024 | conn = NULL; |
57266a6e BF |
4025 | if (status) |
4026 | goto out_put_session; | |
328ead28 | 4027 | |
47ee5298 BF |
4028 | buflen = (seq->cachethis) ? |
4029 | session->se_fchannel.maxresp_cached : | |
4030 | session->se_fchannel.maxresp_sz; | |
4031 | status = (seq->cachethis) ? nfserr_rep_too_big_to_cache : | |
4032 | nfserr_rep_too_big; | |
a5cddc88 | 4033 | if (xdr_restrict_buflen(xdr, buflen - rqstp->rq_auth_slack)) |
47ee5298 | 4034 | goto out_put_session; |
32aaa62e | 4035 | svc_reserve(rqstp, buflen); |
47ee5298 BF |
4036 | |
4037 | status = nfs_ok; | |
b85d4c01 | 4038 | /* Success! bump slot seqid */ |
b85d4c01 | 4039 | slot->sl_seqid = seq->seqid; |
bf5c43c8 | 4040 | slot->sl_flags |= NFSD4_SLOT_INUSE; |
73e79482 BF |
4041 | if (seq->cachethis) |
4042 | slot->sl_flags |= NFSD4_SLOT_CACHETHIS; | |
bf5c43c8 BF |
4043 | else |
4044 | slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; | |
b85d4c01 BH |
4045 | |
4046 | cstate->slot = slot; | |
4047 | cstate->session = session; | |
4b24ca7d | 4048 | cstate->clp = clp; |
b85d4c01 | 4049 | |
b85d4c01 | 4050 | out: |
221a6876 BF |
4051 | switch (clp->cl_cb_state) { |
4052 | case NFSD4_CB_DOWN: | |
4053 | seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; | |
4054 | break; | |
4055 | case NFSD4_CB_FAULT: | |
4056 | seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; | |
4057 | break; | |
4058 | default: | |
4059 | seq->status_flags = 0; | |
aaf84eb9 | 4060 | } |
3bd64a5b BF |
4061 | if (!list_empty(&clp->cl_revoked)) |
4062 | seq->status_flags |= SEQ4_STATUS_RECALLABLE_STATE_REVOKED; | |
221a6876 | 4063 | out_no_session: |
3f42d2c4 KM |
4064 | if (conn) |
4065 | free_conn(conn); | |
c9a49628 | 4066 | spin_unlock(&nn->client_lock); |
b85d4c01 | 4067 | return status; |
66b2b9b2 | 4068 | out_put_session: |
d4e19e70 | 4069 | nfsd4_put_session_locked(session); |
221a6876 | 4070 | goto out_no_session; |
069b6ad4 AA |
4071 | } |
4072 | ||
b607664e TM |
4073 | void |
4074 | nfsd4_sequence_done(struct nfsd4_compoundres *resp) | |
4075 | { | |
4076 | struct nfsd4_compound_state *cs = &resp->cstate; | |
4077 | ||
4078 | if (nfsd4_has_session(cs)) { | |
b607664e TM |
4079 | if (cs->status != nfserr_replay_cache) { |
4080 | nfsd4_store_cache_entry(resp); | |
4081 | cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE; | |
4082 | } | |
d4e19e70 | 4083 | /* Drop session reference that was taken in nfsd4_sequence() */ |
b607664e | 4084 | nfsd4_put_session(cs->session); |
4b24ca7d JL |
4085 | } else if (cs->clp) |
4086 | put_client_renew(cs->clp); | |
b607664e TM |
4087 | } |
4088 | ||
345c2842 | 4089 | __be32 |
eb69853d CH |
4090 | nfsd4_destroy_clientid(struct svc_rqst *rqstp, |
4091 | struct nfsd4_compound_state *cstate, | |
4092 | union nfsd4_op_u *u) | |
345c2842 | 4093 | { |
eb69853d | 4094 | struct nfsd4_destroy_clientid *dc = &u->destroy_clientid; |
6b10ad19 TM |
4095 | struct nfs4_client *conf, *unconf; |
4096 | struct nfs4_client *clp = NULL; | |
57b7b43b | 4097 | __be32 status = 0; |
8daae4dc | 4098 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
345c2842 | 4099 | |
6b10ad19 | 4100 | spin_lock(&nn->client_lock); |
0a7ec377 | 4101 | unconf = find_unconfirmed_client(&dc->clientid, true, nn); |
8daae4dc | 4102 | conf = find_confirmed_client(&dc->clientid, true, nn); |
78389046 | 4103 | WARN_ON_ONCE(conf && unconf); |
345c2842 MJ |
4104 | |
4105 | if (conf) { | |
c0293b01 | 4106 | if (client_has_state(conf)) { |
345c2842 MJ |
4107 | status = nfserr_clientid_busy; |
4108 | goto out; | |
4109 | } | |
fd699b8a JL |
4110 | status = mark_client_expired_locked(conf); |
4111 | if (status) | |
4112 | goto out; | |
6b10ad19 | 4113 | clp = conf; |
345c2842 MJ |
4114 | } else if (unconf) |
4115 | clp = unconf; | |
4116 | else { | |
4117 | status = nfserr_stale_clientid; | |
4118 | goto out; | |
4119 | } | |
dedeb13f | 4120 | if (!nfsd4_mach_creds_match(clp, rqstp)) { |
6b10ad19 | 4121 | clp = NULL; |
57266a6e BF |
4122 | status = nfserr_wrong_cred; |
4123 | goto out; | |
4124 | } | |
c41a9b7a | 4125 | trace_nfsd_clid_destroyed(&clp->cl_clientid); |
6b10ad19 | 4126 | unhash_client_locked(clp); |
345c2842 | 4127 | out: |
6b10ad19 | 4128 | spin_unlock(&nn->client_lock); |
6b10ad19 TM |
4129 | if (clp) |
4130 | expire_client(clp); | |
345c2842 MJ |
4131 | return status; |
4132 | } | |
4133 | ||
4dc6ec00 | 4134 | __be32 |
eb69853d CH |
4135 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, |
4136 | struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) | |
4dc6ec00 | 4137 | { |
eb69853d | 4138 | struct nfsd4_reclaim_complete *rc = &u->reclaim_complete; |
ec59659b | 4139 | struct nfs4_client *clp = cstate->clp; |
57b7b43b | 4140 | __be32 status = 0; |
bcecf1cc | 4141 | |
4dc6ec00 BF |
4142 | if (rc->rca_one_fs) { |
4143 | if (!cstate->current_fh.fh_dentry) | |
4144 | return nfserr_nofilehandle; | |
4145 | /* | |
4146 | * We don't take advantage of the rca_one_fs case. | |
4147 | * That's OK, it's optional, we can safely ignore it. | |
4148 | */ | |
d28c442f | 4149 | return nfs_ok; |
4dc6ec00 | 4150 | } |
bcecf1cc | 4151 | |
bcecf1cc | 4152 | status = nfserr_complete_already; |
ec59659b | 4153 | if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, &clp->cl_flags)) |
bcecf1cc MJ |
4154 | goto out; |
4155 | ||
4156 | status = nfserr_stale_clientid; | |
ec59659b | 4157 | if (is_client_expired(clp)) |
4dc6ec00 BF |
4158 | /* |
4159 | * The following error isn't really legal. | |
4160 | * But we only get here if the client just explicitly | |
4161 | * destroyed the client. Surely it no longer cares what | |
4162 | * error it gets back on an operation for the dead | |
4163 | * client. | |
4164 | */ | |
bcecf1cc MJ |
4165 | goto out; |
4166 | ||
4167 | status = nfs_ok; | |
cee8aa07 | 4168 | trace_nfsd_clid_reclaim_complete(&clp->cl_clientid); |
ec59659b BF |
4169 | nfsd4_client_record_create(clp); |
4170 | inc_reclaim_complete(clp); | |
bcecf1cc | 4171 | out: |
bcecf1cc | 4172 | return status; |
4dc6ec00 BF |
4173 | } |
4174 | ||
b37ad28b | 4175 | __be32 |
b591480b | 4176 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 4177 | union nfsd4_op_u *u) |
1da177e4 | 4178 | { |
eb69853d | 4179 | struct nfsd4_setclientid *setclid = &u->setclientid; |
a084daf5 | 4180 | struct xdr_netobj clname = setclid->se_name; |
1da177e4 | 4181 | nfs4_verifier clverifier = setclid->se_verf; |
3dbacee6 TM |
4182 | struct nfs4_client *conf, *new; |
4183 | struct nfs4_client *unconf = NULL; | |
b37ad28b | 4184 | __be32 status; |
c212cecf SK |
4185 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
4186 | ||
5cc40fd7 TM |
4187 | new = create_client(clname, rqstp, &clverifier); |
4188 | if (new == NULL) | |
4189 | return nfserr_jukebox; | |
3dbacee6 | 4190 | spin_lock(&nn->client_lock); |
382a62e7 | 4191 | conf = find_confirmed_client_by_name(&clname, nn); |
2b634821 | 4192 | if (conf && client_has_state(conf)) { |
1da177e4 | 4193 | status = nfserr_clid_inuse; |
e203d506 BF |
4194 | if (clp_used_exchangeid(conf)) |
4195 | goto out; | |
026722c2 | 4196 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
27787733 | 4197 | trace_nfsd_clid_cred_mismatch(conf, rqstp); |
1da177e4 LT |
4198 | goto out; |
4199 | } | |
1da177e4 | 4200 | } |
a99454aa | 4201 | unconf = find_unconfirmed_client_by_name(&clname, nn); |
8f930711 | 4202 | if (unconf) |
3dbacee6 | 4203 | unhash_client_locked(unconf); |
744ea54c CL |
4204 | if (conf) { |
4205 | if (same_verf(&conf->cl_verifier, &clverifier)) { | |
4206 | copy_clid(new, conf); | |
4207 | gen_confirm(new, nn); | |
4208 | } else | |
4209 | trace_nfsd_clid_verf_mismatch(conf, rqstp, | |
4210 | &clverifier); | |
237f91c8 CL |
4211 | } else |
4212 | trace_nfsd_clid_fresh(new); | |
8323c3b2 | 4213 | new->cl_minorversion = 0; |
6f3d772f | 4214 | gen_callback(new, setclid, rqstp); |
ac55fdc4 | 4215 | add_to_unconfirmed(new); |
1da177e4 LT |
4216 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
4217 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
4218 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
5cc40fd7 | 4219 | new = NULL; |
1da177e4 LT |
4220 | status = nfs_ok; |
4221 | out: | |
3dbacee6 | 4222 | spin_unlock(&nn->client_lock); |
5cc40fd7 TM |
4223 | if (new) |
4224 | free_client(new); | |
237f91c8 CL |
4225 | if (unconf) { |
4226 | trace_nfsd_clid_expire_unconf(&unconf->cl_clientid); | |
3dbacee6 | 4227 | expire_client(unconf); |
237f91c8 | 4228 | } |
1da177e4 LT |
4229 | return status; |
4230 | } | |
4231 | ||
b37ad28b | 4232 | __be32 |
b591480b | 4233 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
eb69853d CH |
4234 | struct nfsd4_compound_state *cstate, |
4235 | union nfsd4_op_u *u) | |
1da177e4 | 4236 | { |
eb69853d CH |
4237 | struct nfsd4_setclientid_confirm *setclientid_confirm = |
4238 | &u->setclientid_confirm; | |
21ab45a4 | 4239 | struct nfs4_client *conf, *unconf; |
d20c11d8 | 4240 | struct nfs4_client *old = NULL; |
1da177e4 LT |
4241 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
4242 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 4243 | __be32 status; |
7f2210fa | 4244 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4245 | |
2c142baa | 4246 | if (STALE_CLIENTID(clid, nn)) |
1da177e4 | 4247 | return nfserr_stale_clientid; |
21ab45a4 | 4248 | |
d20c11d8 | 4249 | spin_lock(&nn->client_lock); |
8daae4dc | 4250 | conf = find_confirmed_client(clid, false, nn); |
0a7ec377 | 4251 | unconf = find_unconfirmed_client(clid, false, nn); |
a186e767 | 4252 | /* |
8695b90a BF |
4253 | * We try hard to give out unique clientid's, so if we get an |
4254 | * attempt to confirm the same clientid with a different cred, | |
f984a7ce BF |
4255 | * the client may be buggy; this should never happen. |
4256 | * | |
4257 | * Nevertheless, RFC 7530 recommends INUSE for this case: | |
a186e767 | 4258 | */ |
f984a7ce | 4259 | status = nfserr_clid_inuse; |
27787733 CL |
4260 | if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { |
4261 | trace_nfsd_clid_cred_mismatch(unconf, rqstp); | |
8695b90a | 4262 | goto out; |
27787733 CL |
4263 | } |
4264 | if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) { | |
4265 | trace_nfsd_clid_cred_mismatch(conf, rqstp); | |
8695b90a | 4266 | goto out; |
27787733 | 4267 | } |
90d700b7 | 4268 | if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) { |
7d22fc11 | 4269 | if (conf && same_verf(&confirm, &conf->cl_confirm)) { |
1da177e4 | 4270 | status = nfs_ok; |
237f91c8 | 4271 | } else |
90d700b7 BF |
4272 | status = nfserr_stale_clientid; |
4273 | goto out; | |
4274 | } | |
4275 | status = nfs_ok; | |
237f91c8 | 4276 | if (conf) { |
d20c11d8 JL |
4277 | old = unconf; |
4278 | unhash_client_locked(old); | |
8695b90a | 4279 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
237f91c8 | 4280 | } else { |
d20c11d8 JL |
4281 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
4282 | if (old) { | |
2b634821 BF |
4283 | status = nfserr_clid_inuse; |
4284 | if (client_has_state(old) | |
4285 | && !same_creds(&unconf->cl_cred, | |
ab451ea9 DN |
4286 | &old->cl_cred)) { |
4287 | old = NULL; | |
2b634821 | 4288 | goto out; |
ab451ea9 | 4289 | } |
d20c11d8 | 4290 | status = mark_client_expired_locked(old); |
7abea1e8 JL |
4291 | if (status) { |
4292 | old = NULL; | |
221a6876 | 4293 | goto out; |
7abea1e8 | 4294 | } |
2958d2ee | 4295 | trace_nfsd_clid_replaced(&old->cl_clientid); |
221a6876 | 4296 | } |
8695b90a | 4297 | move_to_confirmed(unconf); |
d20c11d8 | 4298 | conf = unconf; |
08e8987c | 4299 | } |
d20c11d8 JL |
4300 | get_client_locked(conf); |
4301 | spin_unlock(&nn->client_lock); | |
934bd07f BF |
4302 | if (conf == unconf) |
4303 | fsnotify_dentry(conf->cl_nfsd_info_dentry, FS_MODIFY); | |
d20c11d8 JL |
4304 | nfsd4_probe_callback(conf); |
4305 | spin_lock(&nn->client_lock); | |
4306 | put_client_renew_locked(conf); | |
1da177e4 | 4307 | out: |
d20c11d8 JL |
4308 | spin_unlock(&nn->client_lock); |
4309 | if (old) | |
4310 | expire_client(old); | |
1da177e4 LT |
4311 | return status; |
4312 | } | |
4313 | ||
32513b40 BF |
4314 | static struct nfs4_file *nfsd4_alloc_file(void) |
4315 | { | |
4316 | return kmem_cache_alloc(file_slab, GFP_KERNEL); | |
4317 | } | |
4318 | ||
1da177e4 | 4319 | /* OPEN Share state helper functions */ |
950e0118 | 4320 | |
81a21fa3 CL |
4321 | static void nfsd4_file_init(const struct svc_fh *fh, struct nfs4_file *fp) |
4322 | { | |
818a34eb | 4323 | refcount_set(&fp->fi_ref, 1); |
1d31a253 | 4324 | spin_lock_init(&fp->fi_lock); |
32513b40 BF |
4325 | INIT_LIST_HEAD(&fp->fi_stateids); |
4326 | INIT_LIST_HEAD(&fp->fi_delegations); | |
8287f009 | 4327 | INIT_LIST_HEAD(&fp->fi_clnt_odstate); |
f9b60e22 | 4328 | fh_copy_shallow(&fp->fi_fhandle, &fh->fh_handle); |
0c637be8 | 4329 | fp->fi_deleg_file = NULL; |
32513b40 | 4330 | fp->fi_had_conflict = false; |
baeb4ff0 | 4331 | fp->fi_share_deny = 0; |
32513b40 BF |
4332 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); |
4333 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
a0ce4837 BF |
4334 | fp->fi_aliased = false; |
4335 | fp->fi_inode = d_inode(fh->fh_dentry); | |
9cf514cc CH |
4336 | #ifdef CONFIG_NFSD_PNFS |
4337 | INIT_LIST_HEAD(&fp->fi_lo_states); | |
c5c707f9 | 4338 | atomic_set(&fp->fi_lo_recalls, 0); |
9cf514cc | 4339 | #endif |
1da177e4 LT |
4340 | } |
4341 | ||
e8ff2a84 | 4342 | void |
1da177e4 LT |
4343 | nfsd4_free_slabs(void) |
4344 | { | |
9258a2d5 | 4345 | kmem_cache_destroy(client_slab); |
abf1135b CH |
4346 | kmem_cache_destroy(openowner_slab); |
4347 | kmem_cache_destroy(lockowner_slab); | |
4348 | kmem_cache_destroy(file_slab); | |
4349 | kmem_cache_destroy(stateid_slab); | |
4350 | kmem_cache_destroy(deleg_slab); | |
9258a2d5 | 4351 | kmem_cache_destroy(odstate_slab); |
e60d4398 | 4352 | } |
1da177e4 | 4353 | |
72083396 | 4354 | int |
e60d4398 N |
4355 | nfsd4_init_slabs(void) |
4356 | { | |
9258a2d5 JL |
4357 | client_slab = kmem_cache_create("nfsd4_clients", |
4358 | sizeof(struct nfs4_client), 0, 0, NULL); | |
4359 | if (client_slab == NULL) | |
4360 | goto out; | |
fe0750e5 BF |
4361 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
4362 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
4363 | if (openowner_slab == NULL) | |
9258a2d5 | 4364 | goto out_free_client_slab; |
fe0750e5 | 4365 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", |
3c40794b | 4366 | sizeof(struct nfs4_lockowner), 0, 0, NULL); |
fe0750e5 | 4367 | if (lockowner_slab == NULL) |
abf1135b | 4368 | goto out_free_openowner_slab; |
e60d4398 | 4369 | file_slab = kmem_cache_create("nfsd4_files", |
20c2df83 | 4370 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 | 4371 | if (file_slab == NULL) |
abf1135b | 4372 | goto out_free_lockowner_slab; |
5ac049ac | 4373 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
dcef0413 | 4374 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
5ac049ac | 4375 | if (stateid_slab == NULL) |
abf1135b | 4376 | goto out_free_file_slab; |
5b2d21c1 | 4377 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 4378 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 | 4379 | if (deleg_slab == NULL) |
abf1135b | 4380 | goto out_free_stateid_slab; |
8287f009 SB |
4381 | odstate_slab = kmem_cache_create("nfsd4_odstate", |
4382 | sizeof(struct nfs4_clnt_odstate), 0, 0, NULL); | |
4383 | if (odstate_slab == NULL) | |
4384 | goto out_free_deleg_slab; | |
e60d4398 | 4385 | return 0; |
abf1135b | 4386 | |
8287f009 SB |
4387 | out_free_deleg_slab: |
4388 | kmem_cache_destroy(deleg_slab); | |
abf1135b CH |
4389 | out_free_stateid_slab: |
4390 | kmem_cache_destroy(stateid_slab); | |
4391 | out_free_file_slab: | |
4392 | kmem_cache_destroy(file_slab); | |
4393 | out_free_lockowner_slab: | |
4394 | kmem_cache_destroy(lockowner_slab); | |
4395 | out_free_openowner_slab: | |
4396 | kmem_cache_destroy(openowner_slab); | |
9258a2d5 JL |
4397 | out_free_client_slab: |
4398 | kmem_cache_destroy(client_slab); | |
abf1135b | 4399 | out: |
e60d4398 | 4400 | return -ENOMEM; |
1da177e4 LT |
4401 | } |
4402 | ||
7746b32f | 4403 | static unsigned long |
a1049eb4 | 4404 | nfsd4_state_shrinker_count(struct shrinker *shrink, struct shrink_control *sc) |
7746b32f | 4405 | { |
44df6f43 | 4406 | int count; |
7746b32f DN |
4407 | struct nfsd_net *nn = container_of(shrink, |
4408 | struct nfsd_net, nfsd_client_shrinker); | |
4409 | ||
44df6f43 DN |
4410 | count = atomic_read(&nn->nfsd_courtesy_clients); |
4411 | if (!count) | |
4412 | count = atomic_long_read(&num_delegations); | |
4413 | if (count) | |
7746b32f | 4414 | mod_delayed_work(laundry_wq, &nn->nfsd_shrinker_work, 0); |
44df6f43 | 4415 | return (unsigned long)count; |
7746b32f DN |
4416 | } |
4417 | ||
4418 | static unsigned long | |
a1049eb4 | 4419 | nfsd4_state_shrinker_scan(struct shrinker *shrink, struct shrink_control *sc) |
7746b32f DN |
4420 | { |
4421 | return SHRINK_STOP; | |
4422 | } | |
4423 | ||
4424 | int | |
4425 | nfsd4_init_leases_net(struct nfsd_net *nn) | |
6867137e | 4426 | { |
4271c2c0 DN |
4427 | struct sysinfo si; |
4428 | u64 max_clients; | |
4429 | ||
6867137e DN |
4430 | nn->nfsd4_lease = 90; /* default lease time */ |
4431 | nn->nfsd4_grace = 90; | |
4432 | nn->somebody_reclaimed = false; | |
4433 | nn->track_reclaim_completes = false; | |
a251c17a JD |
4434 | nn->clverifier_counter = get_random_u32(); |
4435 | nn->clientid_base = get_random_u32(); | |
6867137e DN |
4436 | nn->clientid_counter = nn->clientid_base + 1; |
4437 | nn->s2s_cp_cl_id = nn->clientid_counter++; | |
0926c395 DN |
4438 | |
4439 | atomic_set(&nn->nfs4_client_count, 0); | |
4271c2c0 DN |
4440 | si_meminfo(&si); |
4441 | max_clients = (u64)si.totalram * si.mem_unit / (1024 * 1024 * 1024); | |
4442 | max_clients *= NFS4_CLIENTS_PER_GB; | |
4443 | nn->nfs4_max_clients = max_t(int, max_clients, NFS4_CLIENTS_PER_GB); | |
3a4ea23d DN |
4444 | |
4445 | atomic_set(&nn->nfsd_courtesy_clients, 0); | |
a1049eb4 DN |
4446 | nn->nfsd_client_shrinker.scan_objects = nfsd4_state_shrinker_scan; |
4447 | nn->nfsd_client_shrinker.count_objects = nfsd4_state_shrinker_count; | |
7746b32f DN |
4448 | nn->nfsd_client_shrinker.seeks = DEFAULT_SEEKS; |
4449 | return register_shrinker(&nn->nfsd_client_shrinker, "nfsd-client"); | |
4450 | } | |
4451 | ||
4452 | void | |
4453 | nfsd4_leases_net_shutdown(struct nfsd_net *nn) | |
4454 | { | |
4455 | unregister_shrinker(&nn->nfsd_client_shrinker); | |
6867137e DN |
4456 | } |
4457 | ||
ff194bd9 | 4458 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 4459 | { |
ff194bd9 BF |
4460 | rp->rp_status = nfserr_serverfault; |
4461 | rp->rp_buflen = 0; | |
4462 | rp->rp_buf = rp->rp_ibuf; | |
58fb12e6 JL |
4463 | mutex_init(&rp->rp_mutex); |
4464 | } | |
4465 | ||
4466 | static void nfsd4_cstate_assign_replay(struct nfsd4_compound_state *cstate, | |
4467 | struct nfs4_stateowner *so) | |
4468 | { | |
4469 | if (!nfsd4_has_session(cstate)) { | |
4470 | mutex_lock(&so->so_replay.rp_mutex); | |
b5971afa | 4471 | cstate->replay_owner = nfs4_get_stateowner(so); |
58fb12e6 JL |
4472 | } |
4473 | } | |
4474 | ||
4475 | void nfsd4_cstate_clear_replay(struct nfsd4_compound_state *cstate) | |
4476 | { | |
4477 | struct nfs4_stateowner *so = cstate->replay_owner; | |
4478 | ||
4479 | if (so != NULL) { | |
4480 | cstate->replay_owner = NULL; | |
4481 | mutex_unlock(&so->so_replay.rp_mutex); | |
4482 | nfs4_put_stateowner(so); | |
4483 | } | |
1da177e4 LT |
4484 | } |
4485 | ||
fe0750e5 | 4486 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 4487 | { |
1da177e4 | 4488 | struct nfs4_stateowner *sop; |
1da177e4 | 4489 | |
fe0750e5 | 4490 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
4491 | if (!sop) |
4492 | return NULL; | |
4493 | ||
6f4859b8 | 4494 | xdr_netobj_dup(&sop->so_owner, owner, GFP_KERNEL); |
ff194bd9 | 4495 | if (!sop->so_owner.data) { |
fe0750e5 | 4496 | kmem_cache_free(slab, sop); |
1da177e4 | 4497 | return NULL; |
ff194bd9 | 4498 | } |
ff194bd9 | 4499 | |
ea1da636 | 4500 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 BF |
4501 | sop->so_client = clp; |
4502 | init_nfs4_replay(&sop->so_replay); | |
6b180f0b | 4503 | atomic_set(&sop->so_count, 1); |
ff194bd9 BF |
4504 | return sop; |
4505 | } | |
4506 | ||
fe0750e5 | 4507 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 | 4508 | { |
d4f0489f | 4509 | lockdep_assert_held(&clp->cl_lock); |
9b531137 | 4510 | |
d4f0489f TM |
4511 | list_add(&oo->oo_owner.so_strhash, |
4512 | &clp->cl_ownerstr_hashtbl[strhashval]); | |
fe0750e5 | 4513 | list_add(&oo->oo_perclient, &clp->cl_openowners); |
ff194bd9 BF |
4514 | } |
4515 | ||
8f4b54c5 JL |
4516 | static void nfs4_unhash_openowner(struct nfs4_stateowner *so) |
4517 | { | |
d4f0489f | 4518 | unhash_openowner_locked(openowner(so)); |
8f4b54c5 JL |
4519 | } |
4520 | ||
6b180f0b JL |
4521 | static void nfs4_free_openowner(struct nfs4_stateowner *so) |
4522 | { | |
4523 | struct nfs4_openowner *oo = openowner(so); | |
4524 | ||
4525 | kmem_cache_free(openowner_slab, oo); | |
4526 | } | |
4527 | ||
4528 | static const struct nfs4_stateowner_operations openowner_ops = { | |
8f4b54c5 JL |
4529 | .so_unhash = nfs4_unhash_openowner, |
4530 | .so_free = nfs4_free_openowner, | |
6b180f0b JL |
4531 | }; |
4532 | ||
7fc0564e AE |
4533 | static struct nfs4_ol_stateid * |
4534 | nfsd4_find_existing_open(struct nfs4_file *fp, struct nfsd4_open *open) | |
4535 | { | |
4536 | struct nfs4_ol_stateid *local, *ret = NULL; | |
4537 | struct nfs4_openowner *oo = open->op_openowner; | |
4538 | ||
4539 | lockdep_assert_held(&fp->fi_lock); | |
4540 | ||
4541 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { | |
4542 | /* ignore lock owners */ | |
4543 | if (local->st_stateowner->so_is_open_owner == 0) | |
4544 | continue; | |
15ca08d3 TM |
4545 | if (local->st_stateowner != &oo->oo_owner) |
4546 | continue; | |
4547 | if (local->st_stid.sc_type == NFS4_OPEN_STID) { | |
7fc0564e | 4548 | ret = local; |
a15dfcd5 | 4549 | refcount_inc(&ret->st_stid.sc_count); |
7fc0564e AE |
4550 | break; |
4551 | } | |
4552 | } | |
4553 | return ret; | |
4554 | } | |
4555 | ||
15ca08d3 TM |
4556 | static __be32 |
4557 | nfsd4_verify_open_stid(struct nfs4_stid *s) | |
4558 | { | |
4559 | __be32 ret = nfs_ok; | |
4560 | ||
4561 | switch (s->sc_type) { | |
4562 | default: | |
4563 | break; | |
4f176417 | 4564 | case 0: |
15ca08d3 TM |
4565 | case NFS4_CLOSED_STID: |
4566 | case NFS4_CLOSED_DELEG_STID: | |
4567 | ret = nfserr_bad_stateid; | |
4568 | break; | |
4569 | case NFS4_REVOKED_DELEG_STID: | |
4570 | ret = nfserr_deleg_revoked; | |
4571 | } | |
4572 | return ret; | |
4573 | } | |
4574 | ||
4575 | /* Lock the stateid st_mutex, and deal with races with CLOSE */ | |
4576 | static __be32 | |
4577 | nfsd4_lock_ol_stateid(struct nfs4_ol_stateid *stp) | |
4578 | { | |
4579 | __be32 ret; | |
4580 | ||
4f34bd05 | 4581 | mutex_lock_nested(&stp->st_mutex, LOCK_STATEID_MUTEX); |
15ca08d3 TM |
4582 | ret = nfsd4_verify_open_stid(&stp->st_stid); |
4583 | if (ret != nfs_ok) | |
4584 | mutex_unlock(&stp->st_mutex); | |
4585 | return ret; | |
4586 | } | |
4587 | ||
4588 | static struct nfs4_ol_stateid * | |
4589 | nfsd4_find_and_lock_existing_open(struct nfs4_file *fp, struct nfsd4_open *open) | |
4590 | { | |
4591 | struct nfs4_ol_stateid *stp; | |
4592 | for (;;) { | |
4593 | spin_lock(&fp->fi_lock); | |
4594 | stp = nfsd4_find_existing_open(fp, open); | |
4595 | spin_unlock(&fp->fi_lock); | |
4596 | if (!stp || nfsd4_lock_ol_stateid(stp) == nfs_ok) | |
4597 | break; | |
4598 | nfs4_put_stid(&stp->st_stid); | |
4599 | } | |
4600 | return stp; | |
4601 | } | |
4602 | ||
fe0750e5 | 4603 | static struct nfs4_openowner * |
13d6f66b | 4604 | alloc_init_open_stateowner(unsigned int strhashval, struct nfsd4_open *open, |
db24b3b4 JL |
4605 | struct nfsd4_compound_state *cstate) |
4606 | { | |
13d6f66b | 4607 | struct nfs4_client *clp = cstate->clp; |
7ffb5880 | 4608 | struct nfs4_openowner *oo, *ret; |
ff194bd9 | 4609 | |
fe0750e5 BF |
4610 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
4611 | if (!oo) | |
ff194bd9 | 4612 | return NULL; |
6b180f0b | 4613 | oo->oo_owner.so_ops = &openowner_ops; |
fe0750e5 BF |
4614 | oo->oo_owner.so_is_open_owner = 1; |
4615 | oo->oo_owner.so_seqid = open->op_seqid; | |
d3134b10 | 4616 | oo->oo_flags = 0; |
db24b3b4 JL |
4617 | if (nfsd4_has_session(cstate)) |
4618 | oo->oo_flags |= NFS4_OO_CONFIRMED; | |
fe0750e5 | 4619 | oo->oo_time = 0; |
38c387b5 | 4620 | oo->oo_last_closed_stid = NULL; |
fe0750e5 | 4621 | INIT_LIST_HEAD(&oo->oo_close_lru); |
d4f0489f TM |
4622 | spin_lock(&clp->cl_lock); |
4623 | ret = find_openstateowner_str_locked(strhashval, open, clp); | |
7ffb5880 TM |
4624 | if (ret == NULL) { |
4625 | hash_openowner(oo, clp, strhashval); | |
4626 | ret = oo; | |
4627 | } else | |
d50ffded KM |
4628 | nfs4_free_stateowner(&oo->oo_owner); |
4629 | ||
d4f0489f | 4630 | spin_unlock(&clp->cl_lock); |
c5952338 | 4631 | return ret; |
1da177e4 LT |
4632 | } |
4633 | ||
7fc0564e | 4634 | static struct nfs4_ol_stateid * |
8c7245ab | 4635 | init_open_stateid(struct nfs4_file *fp, struct nfsd4_open *open) |
7fc0564e AE |
4636 | { |
4637 | ||
fe0750e5 | 4638 | struct nfs4_openowner *oo = open->op_openowner; |
7fc0564e | 4639 | struct nfs4_ol_stateid *retstp = NULL; |
8c7245ab | 4640 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4641 | |
8c7245ab | 4642 | stp = open->op_stp; |
5cc1fb2a OD |
4643 | /* We are moving these outside of the spinlocks to avoid the warnings */ |
4644 | mutex_init(&stp->st_mutex); | |
4f34bd05 | 4645 | mutex_lock_nested(&stp->st_mutex, OPEN_STATEID_MUTEX); |
5cc1fb2a | 4646 | |
15ca08d3 | 4647 | retry: |
7fc0564e AE |
4648 | spin_lock(&oo->oo_owner.so_client->cl_lock); |
4649 | spin_lock(&fp->fi_lock); | |
4650 | ||
4651 | retstp = nfsd4_find_existing_open(fp, open); | |
4652 | if (retstp) | |
4653 | goto out_unlock; | |
8c7245ab OD |
4654 | |
4655 | open->op_stp = NULL; | |
a15dfcd5 | 4656 | refcount_inc(&stp->st_stid.sc_count); |
3abdb607 | 4657 | stp->st_stid.sc_type = NFS4_OPEN_STID; |
3c87b9b7 | 4658 | INIT_LIST_HEAD(&stp->st_locks); |
b5971afa | 4659 | stp->st_stateowner = nfs4_get_stateowner(&oo->oo_owner); |
13cd2184 | 4660 | get_nfs4_file(fp); |
11b9164a | 4661 | stp->st_stid.sc_file = fp; |
1da177e4 LT |
4662 | stp->st_access_bmap = 0; |
4663 | stp->st_deny_bmap = 0; | |
4c4cd222 | 4664 | stp->st_openstp = NULL; |
1c755dc1 | 4665 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); |
1d31a253 | 4666 | list_add(&stp->st_perfile, &fp->fi_stateids); |
7fc0564e AE |
4667 | |
4668 | out_unlock: | |
1d31a253 | 4669 | spin_unlock(&fp->fi_lock); |
1c755dc1 | 4670 | spin_unlock(&oo->oo_owner.so_client->cl_lock); |
5cc1fb2a | 4671 | if (retstp) { |
15ca08d3 TM |
4672 | /* Handle races with CLOSE */ |
4673 | if (nfsd4_lock_ol_stateid(retstp) != nfs_ok) { | |
4674 | nfs4_put_stid(&retstp->st_stid); | |
4675 | goto retry; | |
4676 | } | |
8c7245ab | 4677 | /* To keep mutex tracking happy */ |
5cc1fb2a | 4678 | mutex_unlock(&stp->st_mutex); |
8c7245ab | 4679 | stp = retstp; |
5cc1fb2a | 4680 | } |
8c7245ab | 4681 | return stp; |
1da177e4 LT |
4682 | } |
4683 | ||
d3134b10 JL |
4684 | /* |
4685 | * In the 4.0 case we need to keep the owners around a little while to handle | |
4686 | * CLOSE replay. We still do need to release any file access that is held by | |
4687 | * them before returning however. | |
4688 | */ | |
fd39ca9a | 4689 | static void |
d3134b10 | 4690 | move_to_close_lru(struct nfs4_ol_stateid *s, struct net *net) |
1da177e4 | 4691 | { |
217526e7 | 4692 | struct nfs4_ol_stateid *last; |
d3134b10 JL |
4693 | struct nfs4_openowner *oo = openowner(s->st_stateowner); |
4694 | struct nfsd_net *nn = net_generic(s->st_stid.sc_client->net, | |
4695 | nfsd_net_id); | |
73758fed | 4696 | |
fe0750e5 | 4697 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 4698 | |
b401be22 JL |
4699 | /* |
4700 | * We know that we hold one reference via nfsd4_close, and another | |
4701 | * "persistent" reference for the client. If the refcount is higher | |
4702 | * than 2, then there are still calls in progress that are using this | |
4703 | * stateid. We can't put the sc_file reference until they are finished. | |
4704 | * Wait for the refcount to drop to 2. Since it has been unhashed, | |
4705 | * there should be no danger of the refcount going back up again at | |
4706 | * this point. | |
4707 | */ | |
a15dfcd5 | 4708 | wait_event(close_wq, refcount_read(&s->st_stid.sc_count) == 2); |
b401be22 | 4709 | |
d3134b10 JL |
4710 | release_all_access(s); |
4711 | if (s->st_stid.sc_file) { | |
4712 | put_nfs4_file(s->st_stid.sc_file); | |
4713 | s->st_stid.sc_file = NULL; | |
4714 | } | |
217526e7 JL |
4715 | |
4716 | spin_lock(&nn->client_lock); | |
4717 | last = oo->oo_last_closed_stid; | |
d3134b10 | 4718 | oo->oo_last_closed_stid = s; |
73758fed | 4719 | list_move_tail(&oo->oo_close_lru, &nn->close_lru); |
20b7d86f | 4720 | oo->oo_time = ktime_get_boottime_seconds(); |
217526e7 JL |
4721 | spin_unlock(&nn->client_lock); |
4722 | if (last) | |
4723 | nfs4_put_stid(&last->st_stid); | |
1da177e4 LT |
4724 | } |
4725 | ||
15424748 CL |
4726 | static noinline_for_stack struct nfs4_file * |
4727 | nfsd4_file_hash_lookup(const struct svc_fh *fhp) | |
1da177e4 | 4728 | { |
d47b295e CL |
4729 | struct inode *inode = d_inode(fhp->fh_dentry); |
4730 | struct rhlist_head *tmp, *list; | |
15424748 | 4731 | struct nfs4_file *fi; |
1da177e4 | 4732 | |
15424748 | 4733 | rcu_read_lock(); |
d47b295e CL |
4734 | list = rhltable_lookup(&nfs4_file_rhltable, &inode, |
4735 | nfs4_file_rhash_params); | |
4736 | rhl_for_each_entry_rcu(fi, tmp, list, fi_rlist) { | |
15424748 CL |
4737 | if (fh_match(&fi->fi_fhandle, &fhp->fh_handle)) { |
4738 | if (refcount_inc_not_zero(&fi->fi_ref)) { | |
4739 | rcu_read_unlock(); | |
4740 | return fi; | |
4741 | } | |
13cd2184 | 4742 | } |
1da177e4 | 4743 | } |
9270fc51 | 4744 | rcu_read_unlock(); |
1da177e4 LT |
4745 | return NULL; |
4746 | } | |
4747 | ||
9270fc51 CL |
4748 | /* |
4749 | * On hash insertion, identify entries with the same inode but | |
d47b295e CL |
4750 | * distinct filehandles. They will all be on the list returned |
4751 | * by rhltable_lookup(). | |
4752 | * | |
4753 | * inode->i_lock prevents racing insertions from adding an entry | |
4754 | * for the same inode/fhp pair twice. | |
9270fc51 CL |
4755 | */ |
4756 | static noinline_for_stack struct nfs4_file * | |
4757 | nfsd4_file_hash_insert(struct nfs4_file *new, const struct svc_fh *fhp) | |
a0ce4837 | 4758 | { |
d47b295e CL |
4759 | struct inode *inode = d_inode(fhp->fh_dentry); |
4760 | struct rhlist_head *tmp, *list; | |
a0ce4837 BF |
4761 | struct nfs4_file *ret = NULL; |
4762 | bool alias_found = false; | |
9270fc51 | 4763 | struct nfs4_file *fi; |
d47b295e | 4764 | int err; |
a0ce4837 | 4765 | |
d47b295e CL |
4766 | rcu_read_lock(); |
4767 | spin_lock(&inode->i_lock); | |
4768 | ||
4769 | list = rhltable_lookup(&nfs4_file_rhltable, &inode, | |
4770 | nfs4_file_rhash_params); | |
4771 | rhl_for_each_entry_rcu(fi, tmp, list, fi_rlist) { | |
9270fc51 CL |
4772 | if (fh_match(&fi->fi_fhandle, &fhp->fh_handle)) { |
4773 | if (refcount_inc_not_zero(&fi->fi_ref)) | |
4774 | ret = fi; | |
d47b295e | 4775 | } else |
9270fc51 | 4776 | fi->fi_aliased = alias_found = true; |
a0ce4837 | 4777 | } |
d47b295e CL |
4778 | if (ret) |
4779 | goto out_unlock; | |
a0ce4837 | 4780 | |
d47b295e CL |
4781 | nfsd4_file_init(fhp, new); |
4782 | err = rhltable_insert(&nfs4_file_rhltable, &new->fi_rlist, | |
4783 | nfs4_file_rhash_params); | |
4784 | if (err) | |
4785 | goto out_unlock; | |
950e0118 | 4786 | |
d47b295e CL |
4787 | new->fi_aliased = alias_found; |
4788 | ret = new; | |
4789 | ||
4790 | out_unlock: | |
4791 | spin_unlock(&inode->i_lock); | |
5b095e99 | 4792 | rcu_read_unlock(); |
a0ce4837 | 4793 | return ret; |
950e0118 TM |
4794 | } |
4795 | ||
3341678f | 4796 | static noinline_for_stack void nfsd4_file_hash_remove(struct nfs4_file *fi) |
950e0118 | 4797 | { |
d47b295e CL |
4798 | rhltable_remove(&nfs4_file_rhltable, &fi->fi_rlist, |
4799 | nfs4_file_rhash_params); | |
950e0118 TM |
4800 | } |
4801 | ||
1da177e4 LT |
4802 | /* |
4803 | * Called to check deny when READ with all zero stateid or | |
4804 | * WRITE with all zero or all one stateid | |
4805 | */ | |
b37ad28b | 4806 | static __be32 |
1da177e4 LT |
4807 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
4808 | { | |
1da177e4 | 4809 | struct nfs4_file *fp; |
baeb4ff0 | 4810 | __be32 ret = nfs_ok; |
1da177e4 | 4811 | |
15424748 | 4812 | fp = nfsd4_file_hash_lookup(current_fh); |
13cd2184 | 4813 | if (!fp) |
baeb4ff0 | 4814 | return ret; |
15424748 | 4815 | |
baeb4ff0 | 4816 | /* Check for conflicting share reservations */ |
1d31a253 | 4817 | spin_lock(&fp->fi_lock); |
baeb4ff0 JL |
4818 | if (fp->fi_share_deny & deny_type) |
4819 | ret = nfserr_locked; | |
1d31a253 | 4820 | spin_unlock(&fp->fi_lock); |
13cd2184 N |
4821 | put_nfs4_file(fp); |
4822 | return ret; | |
1da177e4 LT |
4823 | } |
4824 | ||
c035362e CL |
4825 | static bool nfsd4_deleg_present(const struct inode *inode) |
4826 | { | |
77c67530 | 4827 | struct file_lock_context *ctx = locks_inode_context(inode); |
c035362e CL |
4828 | |
4829 | return ctx && !list_empty_careful(&ctx->flc_lease); | |
4830 | } | |
4831 | ||
4832 | /** | |
4833 | * nfsd_wait_for_delegreturn - wait for delegations to be returned | |
4834 | * @rqstp: the RPC transaction being executed | |
4835 | * @inode: in-core inode of the file being waited for | |
4836 | * | |
4837 | * The timeout prevents deadlock if all nfsd threads happen to be | |
4838 | * tied up waiting for returning delegations. | |
4839 | * | |
4840 | * Return values: | |
4841 | * %true: delegation was returned | |
4842 | * %false: timed out waiting for delegreturn | |
4843 | */ | |
4844 | bool nfsd_wait_for_delegreturn(struct svc_rqst *rqstp, struct inode *inode) | |
4845 | { | |
4846 | long __maybe_unused timeo; | |
4847 | ||
4848 | timeo = wait_var_event_timeout(inode, !nfsd4_deleg_present(inode), | |
4849 | NFSD_DELEGRETURN_TIMEOUT); | |
4850 | trace_nfsd_delegret_wakeup(rqstp, inode, timeo); | |
4851 | return timeo > 0; | |
4852 | } | |
4853 | ||
0162ac2b | 4854 | static void nfsd4_cb_recall_prepare(struct nfsd4_callback *cb) |
1da177e4 | 4855 | { |
0162ac2b | 4856 | struct nfs4_delegation *dp = cb_to_delegation(cb); |
11b9164a TM |
4857 | struct nfsd_net *nn = net_generic(dp->dl_stid.sc_client->net, |
4858 | nfsd_net_id); | |
e8c69d17 | 4859 | |
11b9164a | 4860 | block_delegations(&dp->dl_stid.sc_file->fi_fhandle); |
f54fe962 | 4861 | |
dff1399f | 4862 | /* |
f54fe962 JL |
4863 | * We can't do this in nfsd_break_deleg_cb because it is |
4864 | * already holding inode->i_lock. | |
4865 | * | |
dff1399f JL |
4866 | * If the dl_time != 0, then we know that it has already been |
4867 | * queued for a lease break. Don't queue it again. | |
4868 | */ | |
f54fe962 | 4869 | spin_lock(&state_lock); |
548ec080 | 4870 | if (delegation_hashed(dp) && dp->dl_time == 0) { |
20b7d86f | 4871 | dp->dl_time = ktime_get_boottime_seconds(); |
02e1215f | 4872 | list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru); |
dff1399f | 4873 | } |
02e1215f JL |
4874 | spin_unlock(&state_lock); |
4875 | } | |
1da177e4 | 4876 | |
0162ac2b CH |
4877 | static int nfsd4_cb_recall_done(struct nfsd4_callback *cb, |
4878 | struct rpc_task *task) | |
4879 | { | |
4880 | struct nfs4_delegation *dp = cb_to_delegation(cb); | |
4881 | ||
1035d654 CL |
4882 | trace_nfsd_cb_recall_done(&dp->dl_stid.sc_stateid, task); |
4883 | ||
12ed22f3 BF |
4884 | if (dp->dl_stid.sc_type == NFS4_CLOSED_DELEG_STID || |
4885 | dp->dl_stid.sc_type == NFS4_REVOKED_DELEG_STID) | |
a457974f AE |
4886 | return 1; |
4887 | ||
0162ac2b CH |
4888 | switch (task->tk_status) { |
4889 | case 0: | |
4890 | return 1; | |
1c73b9d2 SM |
4891 | case -NFS4ERR_DELAY: |
4892 | rpc_delay(task, 2 * HZ); | |
4893 | return 0; | |
0162ac2b CH |
4894 | case -EBADHANDLE: |
4895 | case -NFS4ERR_BAD_STATEID: | |
4896 | /* | |
4897 | * Race: client probably got cb_recall before open reply | |
4898 | * granting delegation. | |
4899 | */ | |
4900 | if (dp->dl_retries--) { | |
4901 | rpc_delay(task, 2 * HZ); | |
4902 | return 0; | |
4903 | } | |
df561f66 | 4904 | fallthrough; |
0162ac2b | 4905 | default: |
1c73b9d2 | 4906 | return 1; |
0162ac2b CH |
4907 | } |
4908 | } | |
4909 | ||
4910 | static void nfsd4_cb_recall_release(struct nfsd4_callback *cb) | |
4911 | { | |
4912 | struct nfs4_delegation *dp = cb_to_delegation(cb); | |
4913 | ||
4914 | nfs4_put_stid(&dp->dl_stid); | |
4915 | } | |
4916 | ||
c4cb8974 | 4917 | static const struct nfsd4_callback_ops nfsd4_cb_recall_ops = { |
0162ac2b CH |
4918 | .prepare = nfsd4_cb_recall_prepare, |
4919 | .done = nfsd4_cb_recall_done, | |
4920 | .release = nfsd4_cb_recall_release, | |
4921 | }; | |
4922 | ||
02e1215f JL |
4923 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
4924 | { | |
4925 | /* | |
4926 | * We're assuming the state code never drops its reference | |
4927 | * without first removing the lease. Since we're in this lease | |
4a269efb | 4928 | * callback (and since the lease code is serialized by the |
25fbe1fc | 4929 | * flc_lock) we know the server hasn't removed the lease yet, and |
4a269efb | 4930 | * we know it's safe to take a reference. |
02e1215f | 4931 | */ |
a15dfcd5 | 4932 | refcount_inc(&dp->dl_stid.sc_count); |
b95239ca | 4933 | WARN_ON_ONCE(!nfsd4_run_cb(&dp->dl_recall)); |
6b57d9c8 BF |
4934 | } |
4935 | ||
25fbe1fc | 4936 | /* Called from break_lease() with flc_lock held. */ |
4d01b7f5 JL |
4937 | static bool |
4938 | nfsd_break_deleg_cb(struct file_lock *fl) | |
6b57d9c8 | 4939 | { |
653e514e BF |
4940 | struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; |
4941 | struct nfs4_file *fp = dp->dl_stid.sc_file; | |
66af2579 DN |
4942 | struct nfs4_client *clp = dp->dl_stid.sc_client; |
4943 | struct nfsd_net *nn; | |
6b57d9c8 | 4944 | |
17d76ddf | 4945 | trace_nfsd_cb_recall(&dp->dl_stid); |
dd5e3fbc | 4946 | |
66af2579 DN |
4947 | dp->dl_recalled = true; |
4948 | atomic_inc(&clp->cl_delegs_in_recall); | |
4949 | if (try_to_expire_client(clp)) { | |
4950 | nn = net_generic(clp->net, nfsd_net_id); | |
4951 | mod_delayed_work(laundry_wq, &nn->laundromat_work, 0); | |
4952 | } | |
4953 | ||
0272e1fd BF |
4954 | /* |
4955 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 4956 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 4957 | * in time: |
0272e1fd BF |
4958 | */ |
4959 | fl->fl_break_time = 0; | |
1da177e4 | 4960 | |
02e1215f | 4961 | spin_lock(&fp->fi_lock); |
417c6629 | 4962 | fp->fi_had_conflict = true; |
353601e7 | 4963 | nfsd_break_one_deleg(dp); |
02e1215f | 4964 | spin_unlock(&fp->fi_lock); |
b95239ca | 4965 | return false; |
1da177e4 LT |
4966 | } |
4967 | ||
50719bf3 CL |
4968 | /** |
4969 | * nfsd_breaker_owns_lease - Check if lease conflict was resolved | |
4970 | * @fl: Lock state to check | |
4971 | * | |
4972 | * Return values: | |
4973 | * %true: Lease conflict was resolved | |
4974 | * %false: Lease conflict was not resolved. | |
4975 | */ | |
28df3d15 BF |
4976 | static bool nfsd_breaker_owns_lease(struct file_lock *fl) |
4977 | { | |
4978 | struct nfs4_delegation *dl = fl->fl_owner; | |
4979 | struct svc_rqst *rqst; | |
4980 | struct nfs4_client *clp; | |
4981 | ||
4982 | if (!i_am_nfsd()) | |
50719bf3 | 4983 | return false; |
28df3d15 | 4984 | rqst = kthread_data(current); |
13956160 BF |
4985 | /* Note rq_prog == NFS_ACL_PROGRAM is also possible: */ |
4986 | if (rqst->rq_prog != NFS_PROGRAM || rqst->rq_vers < 4) | |
50719bf3 | 4987 | return false; |
28df3d15 BF |
4988 | clp = *(rqst->rq_lease_breaker); |
4989 | return dl->dl_stid.sc_client == clp; | |
4990 | } | |
4991 | ||
c45198ed | 4992 | static int |
7448cc37 JL |
4993 | nfsd_change_deleg_cb(struct file_lock *onlist, int arg, |
4994 | struct list_head *dispose) | |
1da177e4 | 4995 | { |
66af2579 DN |
4996 | struct nfs4_delegation *dp = (struct nfs4_delegation *)onlist->fl_owner; |
4997 | struct nfs4_client *clp = dp->dl_stid.sc_client; | |
4998 | ||
4999 | if (arg & F_UNLCK) { | |
5000 | if (dp->dl_recalled) | |
5001 | atomic_dec(&clp->cl_delegs_in_recall); | |
c45198ed | 5002 | return lease_modify(onlist, arg, dispose); |
66af2579 | 5003 | } else |
1da177e4 LT |
5004 | return -EAGAIN; |
5005 | } | |
5006 | ||
7b021967 | 5007 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
28df3d15 | 5008 | .lm_breaker_owns_lease = nfsd_breaker_owns_lease, |
8fb47a4f BF |
5009 | .lm_break = nfsd_break_deleg_cb, |
5010 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
5011 | }; |
5012 | ||
7a8711c9 BF |
5013 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
5014 | { | |
5015 | if (nfsd4_has_session(cstate)) | |
5016 | return nfs_ok; | |
5017 | if (seqid == so->so_seqid - 1) | |
5018 | return nfserr_replay_me; | |
5019 | if (seqid == so->so_seqid) | |
5020 | return nfs_ok; | |
5021 | return nfserr_bad_seqid; | |
5022 | } | |
1da177e4 | 5023 | |
7950b531 BF |
5024 | static struct nfs4_client *lookup_clientid(clientid_t *clid, bool sessions, |
5025 | struct nfsd_net *nn) | |
5026 | { | |
5027 | struct nfs4_client *found; | |
5028 | ||
5029 | spin_lock(&nn->client_lock); | |
5030 | found = find_confirmed_client(clid, sessions, nn); | |
5031 | if (found) | |
5032 | atomic_inc(&found->cl_rpc_users); | |
5033 | spin_unlock(&nn->client_lock); | |
5034 | return found; | |
5035 | } | |
5036 | ||
460d2709 | 5037 | static __be32 set_client(clientid_t *clid, |
4b24ca7d | 5038 | struct nfsd4_compound_state *cstate, |
f71475ba | 5039 | struct nfsd_net *nn) |
4b24ca7d | 5040 | { |
4b24ca7d | 5041 | if (cstate->clp) { |
7950b531 | 5042 | if (!same_clid(&cstate->clp->cl_clientid, clid)) |
4b24ca7d JL |
5043 | return nfserr_stale_clientid; |
5044 | return nfs_ok; | |
5045 | } | |
4b24ca7d JL |
5046 | if (STALE_CLIENTID(clid, nn)) |
5047 | return nfserr_stale_clientid; | |
4b24ca7d | 5048 | /* |
f71475ba BF |
5049 | * We're in the 4.0 case (otherwise the SEQUENCE op would have |
5050 | * set cstate->clp), so session = false: | |
4b24ca7d | 5051 | */ |
f71475ba | 5052 | cstate->clp = lookup_clientid(clid, false, nn); |
7950b531 | 5053 | if (!cstate->clp) |
4b24ca7d | 5054 | return nfserr_expired; |
4b24ca7d JL |
5055 | return nfs_ok; |
5056 | } | |
5057 | ||
b37ad28b | 5058 | __be32 |
6668958f | 5059 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
3320fef1 | 5060 | struct nfsd4_open *open, struct nfsd_net *nn) |
1da177e4 | 5061 | { |
1da177e4 LT |
5062 | clientid_t *clientid = &open->op_clientid; |
5063 | struct nfs4_client *clp = NULL; | |
5064 | unsigned int strhashval; | |
fe0750e5 | 5065 | struct nfs4_openowner *oo = NULL; |
4cdc951b | 5066 | __be32 status; |
1da177e4 | 5067 | |
32513b40 BF |
5068 | /* |
5069 | * In case we need it later, after we've already created the | |
5070 | * file and don't want to risk a further failure: | |
5071 | */ | |
5072 | open->op_file = nfsd4_alloc_file(); | |
5073 | if (open->op_file == NULL) | |
5074 | return nfserr_jukebox; | |
1da177e4 | 5075 | |
f71475ba | 5076 | status = set_client(clientid, cstate, nn); |
2d91e895 TM |
5077 | if (status) |
5078 | return status; | |
5079 | clp = cstate->clp; | |
5080 | ||
d4f0489f TM |
5081 | strhashval = ownerstr_hashval(&open->op_owner); |
5082 | oo = find_openstateowner_str(strhashval, open, clp); | |
fe0750e5 BF |
5083 | open->op_openowner = oo; |
5084 | if (!oo) { | |
bcf130f9 | 5085 | goto new_owner; |
1da177e4 | 5086 | } |
dad1c067 | 5087 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
0f442aa2 | 5088 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
5089 | release_openowner(oo); |
5090 | open->op_openowner = NULL; | |
bcf130f9 | 5091 | goto new_owner; |
0f442aa2 | 5092 | } |
4cdc951b BF |
5093 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
5094 | if (status) | |
5095 | return status; | |
4cdc951b | 5096 | goto alloc_stateid; |
bcf130f9 | 5097 | new_owner: |
13d6f66b | 5098 | oo = alloc_init_open_stateowner(strhashval, open, cstate); |
bcf130f9 BF |
5099 | if (oo == NULL) |
5100 | return nfserr_jukebox; | |
5101 | open->op_openowner = oo; | |
4cdc951b | 5102 | alloc_stateid: |
b49e084d | 5103 | open->op_stp = nfs4_alloc_open_stateid(clp); |
4cdc951b BF |
5104 | if (!open->op_stp) |
5105 | return nfserr_jukebox; | |
8287f009 SB |
5106 | |
5107 | if (nfsd4_has_session(cstate) && | |
5108 | (cstate->current_fh.fh_export->ex_flags & NFSEXP_PNFS)) { | |
5109 | open->op_odstate = alloc_clnt_odstate(clp); | |
5110 | if (!open->op_odstate) | |
5111 | return nfserr_jukebox; | |
5112 | } | |
5113 | ||
0f442aa2 | 5114 | return nfs_ok; |
1da177e4 LT |
5115 | } |
5116 | ||
b37ad28b | 5117 | static inline __be32 |
4a6e43e6 N |
5118 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
5119 | { | |
5120 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
5121 | return nfserr_openmode; | |
5122 | else | |
5123 | return nfs_ok; | |
5124 | } | |
5125 | ||
f459e453 | 5126 | static int share_access_to_flags(u32 share_access) |
52f4fb43 | 5127 | { |
f459e453 | 5128 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
52f4fb43 N |
5129 | } |
5130 | ||
38c2f4b1 | 5131 | static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) |
24a0111e | 5132 | { |
f459e453 | 5133 | struct nfs4_stid *ret; |
24a0111e | 5134 | |
95da1b3a AE |
5135 | ret = find_stateid_by_type(cl, s, |
5136 | NFS4_DELEG_STID|NFS4_REVOKED_DELEG_STID); | |
f459e453 BF |
5137 | if (!ret) |
5138 | return NULL; | |
5139 | return delegstateid(ret); | |
24a0111e BF |
5140 | } |
5141 | ||
8b289b2c BF |
5142 | static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) |
5143 | { | |
5144 | return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || | |
5145 | open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; | |
5146 | } | |
5147 | ||
b37ad28b | 5148 | static __be32 |
41d22663 | 5149 | nfs4_check_deleg(struct nfs4_client *cl, struct nfsd4_open *open, |
567d9829 N |
5150 | struct nfs4_delegation **dp) |
5151 | { | |
5152 | int flags; | |
b37ad28b | 5153 | __be32 status = nfserr_bad_stateid; |
dcd94cc2 | 5154 | struct nfs4_delegation *deleg; |
567d9829 | 5155 | |
dcd94cc2 TM |
5156 | deleg = find_deleg_stateid(cl, &open->op_delegate_stateid); |
5157 | if (deleg == NULL) | |
c44c5eeb | 5158 | goto out; |
95da1b3a AE |
5159 | if (deleg->dl_stid.sc_type == NFS4_REVOKED_DELEG_STID) { |
5160 | nfs4_put_stid(&deleg->dl_stid); | |
5161 | if (cl->cl_minorversion) | |
5162 | status = nfserr_deleg_revoked; | |
5163 | goto out; | |
5164 | } | |
24a0111e | 5165 | flags = share_access_to_flags(open->op_share_access); |
dcd94cc2 TM |
5166 | status = nfs4_check_delegmode(deleg, flags); |
5167 | if (status) { | |
5168 | nfs4_put_stid(&deleg->dl_stid); | |
5169 | goto out; | |
5170 | } | |
5171 | *dp = deleg; | |
c44c5eeb | 5172 | out: |
8b289b2c | 5173 | if (!nfsd4_is_deleg_cur(open)) |
c44c5eeb N |
5174 | return nfs_ok; |
5175 | if (status) | |
5176 | return status; | |
dad1c067 | 5177 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
c44c5eeb | 5178 | return nfs_ok; |
567d9829 N |
5179 | } |
5180 | ||
21fb4016 BF |
5181 | static inline int nfs4_access_to_access(u32 nfs4_access) |
5182 | { | |
5183 | int flags = 0; | |
5184 | ||
5185 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
5186 | flags |= NFSD_MAY_READ; | |
5187 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
5188 | flags |= NFSD_MAY_WRITE; | |
5189 | return flags; | |
5190 | } | |
5191 | ||
7e6a72e5 CH |
5192 | static inline __be32 |
5193 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, | |
5194 | struct nfsd4_open *open) | |
5195 | { | |
5196 | struct iattr iattr = { | |
5197 | .ia_valid = ATTR_SIZE, | |
5198 | .ia_size = 0, | |
5199 | }; | |
7fe2a71d N |
5200 | struct nfsd_attrs attrs = { |
5201 | .na_iattr = &iattr, | |
5202 | }; | |
7e6a72e5 CH |
5203 | if (!open->op_truncate) |
5204 | return 0; | |
5205 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
5206 | return nfserr_inval; | |
7fe2a71d | 5207 | return nfsd_setattr(rqstp, fh, &attrs, 0, (time64_t)0); |
7e6a72e5 CH |
5208 | } |
5209 | ||
0c12eaff | 5210 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
6eb3a1d0 | 5211 | struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp, |
3d694271 | 5212 | struct nfsd4_open *open, bool new_stp) |
f9d7562f | 5213 | { |
fd4f83fd | 5214 | struct nfsd_file *nf = NULL; |
f9d7562f | 5215 | __be32 status; |
0c12eaff CB |
5216 | int oflag = nfs4_access_to_omode(open->op_share_access); |
5217 | int access = nfs4_access_to_access(open->op_share_access); | |
baeb4ff0 | 5218 | unsigned char old_access_bmap, old_deny_bmap; |
0c12eaff | 5219 | |
de18643d | 5220 | spin_lock(&fp->fi_lock); |
baeb4ff0 JL |
5221 | |
5222 | /* | |
5223 | * Are we trying to set a deny mode that would conflict with | |
5224 | * current access? | |
5225 | */ | |
5226 | status = nfs4_file_check_deny(fp, open->op_share_deny); | |
5227 | if (status != nfs_ok) { | |
3d694271 DN |
5228 | if (status != nfserr_share_denied) { |
5229 | spin_unlock(&fp->fi_lock); | |
5230 | goto out; | |
5231 | } | |
5232 | if (nfs4_resolve_deny_conflicts_locked(fp, new_stp, | |
5233 | stp, open->op_share_deny, false)) | |
5234 | status = nfserr_jukebox; | |
baeb4ff0 JL |
5235 | spin_unlock(&fp->fi_lock); |
5236 | goto out; | |
5237 | } | |
5238 | ||
5239 | /* set access to the file */ | |
5240 | status = nfs4_file_get_access(fp, open->op_share_access); | |
5241 | if (status != nfs_ok) { | |
3d694271 DN |
5242 | if (status != nfserr_share_denied) { |
5243 | spin_unlock(&fp->fi_lock); | |
5244 | goto out; | |
5245 | } | |
5246 | if (nfs4_resolve_deny_conflicts_locked(fp, new_stp, | |
5247 | stp, open->op_share_access, true)) | |
5248 | status = nfserr_jukebox; | |
baeb4ff0 JL |
5249 | spin_unlock(&fp->fi_lock); |
5250 | goto out; | |
5251 | } | |
5252 | ||
5253 | /* Set access bits in stateid */ | |
5254 | old_access_bmap = stp->st_access_bmap; | |
5255 | set_access(open->op_share_access, stp); | |
5256 | ||
5257 | /* Set new deny mask */ | |
5258 | old_deny_bmap = stp->st_deny_bmap; | |
5259 | set_deny(open->op_share_deny, stp); | |
5260 | fp->fi_share_deny |= (open->op_share_deny & NFS4_SHARE_DENY_BOTH); | |
5261 | ||
f9d7562f | 5262 | if (!fp->fi_fds[oflag]) { |
de18643d | 5263 | spin_unlock(&fp->fi_lock); |
fb70bf12 CL |
5264 | |
5265 | if (!open->op_filp) { | |
5266 | status = nfsd_file_acquire(rqstp, cur_fh, access, &nf); | |
5267 | if (status != nfs_ok) | |
5268 | goto out_put_access; | |
5269 | } else { | |
5270 | status = nfsd_file_create(rqstp, cur_fh, access, &nf); | |
5271 | if (status != nfs_ok) | |
5272 | goto out_put_access; | |
5273 | nf->nf_file = open->op_filp; | |
5274 | open->op_filp = NULL; | |
be023006 | 5275 | trace_nfsd_file_create(rqstp, access, nf); |
fb70bf12 CL |
5276 | } |
5277 | ||
de18643d TM |
5278 | spin_lock(&fp->fi_lock); |
5279 | if (!fp->fi_fds[oflag]) { | |
fd4f83fd JL |
5280 | fp->fi_fds[oflag] = nf; |
5281 | nf = NULL; | |
de18643d | 5282 | } |
f9d7562f | 5283 | } |
de18643d | 5284 | spin_unlock(&fp->fi_lock); |
fd4f83fd JL |
5285 | if (nf) |
5286 | nfsd_file_put(nf); | |
f9d7562f | 5287 | |
217fd6f6 BF |
5288 | status = nfserrno(nfsd_open_break_lease(cur_fh->fh_dentry->d_inode, |
5289 | access)); | |
5290 | if (status) | |
5291 | goto out_put_access; | |
5292 | ||
7e6a72e5 CH |
5293 | status = nfsd4_truncate(rqstp, cur_fh, open); |
5294 | if (status) | |
5295 | goto out_put_access; | |
7e6a72e5 CH |
5296 | out: |
5297 | return status; | |
baeb4ff0 JL |
5298 | out_put_access: |
5299 | stp->st_access_bmap = old_access_bmap; | |
5300 | nfs4_file_put_access(fp, open->op_share_access); | |
5301 | reset_union_bmap_deny(bmap_to_share_mode(old_deny_bmap), stp); | |
5302 | goto out; | |
1da177e4 LT |
5303 | } |
5304 | ||
b37ad28b | 5305 | static __be32 |
3d694271 DN |
5306 | nfs4_upgrade_open(struct svc_rqst *rqstp, struct nfs4_file *fp, |
5307 | struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp, | |
5308 | struct nfsd4_open *open) | |
1da177e4 | 5309 | { |
b37ad28b | 5310 | __be32 status; |
6ac75368 | 5311 | unsigned char old_deny_bmap = stp->st_deny_bmap; |
1da177e4 | 5312 | |
6eb3a1d0 | 5313 | if (!test_access(open->op_share_access, stp)) |
3d694271 | 5314 | return nfs4_get_vfs_file(rqstp, fp, cur_fh, stp, open, false); |
7e6a72e5 | 5315 | |
baeb4ff0 JL |
5316 | /* test and set deny mode */ |
5317 | spin_lock(&fp->fi_lock); | |
5318 | status = nfs4_file_check_deny(fp, open->op_share_deny); | |
5319 | if (status == nfs_ok) { | |
3d694271 DN |
5320 | if (status != nfserr_share_denied) { |
5321 | set_deny(open->op_share_deny, stp); | |
5322 | fp->fi_share_deny |= | |
baeb4ff0 | 5323 | (open->op_share_deny & NFS4_SHARE_DENY_BOTH); |
3d694271 DN |
5324 | } else { |
5325 | if (nfs4_resolve_deny_conflicts_locked(fp, false, | |
5326 | stp, open->op_share_deny, false)) | |
5327 | status = nfserr_jukebox; | |
5328 | } | |
baeb4ff0 JL |
5329 | } |
5330 | spin_unlock(&fp->fi_lock); | |
5331 | ||
5332 | if (status != nfs_ok) | |
1da177e4 | 5333 | return status; |
1da177e4 | 5334 | |
baeb4ff0 JL |
5335 | status = nfsd4_truncate(rqstp, cur_fh, open); |
5336 | if (status != nfs_ok) | |
5337 | reset_union_bmap_deny(old_deny_bmap, stp); | |
5338 | return status; | |
5339 | } | |
1da177e4 | 5340 | |
14a24e99 BF |
5341 | /* Should we give out recallable state?: */ |
5342 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
5343 | { | |
5344 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
5345 | return true; | |
5346 | /* | |
5347 | * In the sessions case, since we don't have to establish a | |
5348 | * separate connection for callbacks, we assume it's OK | |
5349 | * until we hear otherwise: | |
5350 | */ | |
5351 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
5352 | } | |
5353 | ||
653e514e BF |
5354 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, |
5355 | int flag) | |
22d38c4c BF |
5356 | { |
5357 | struct file_lock *fl; | |
5358 | ||
5359 | fl = locks_alloc_lock(); | |
5360 | if (!fl) | |
5361 | return NULL; | |
22d38c4c | 5362 | fl->fl_lmops = &nfsd_lease_mng_ops; |
617588d5 | 5363 | fl->fl_flags = FL_DELEG; |
22d38c4c BF |
5364 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; |
5365 | fl->fl_end = OFFSET_MAX; | |
653e514e | 5366 | fl->fl_owner = (fl_owner_t)dp; |
22d38c4c | 5367 | fl->fl_pid = current->tgid; |
eb82dd39 | 5368 | fl->fl_file = dp->dl_stid.sc_file->fi_deleg_file->nf_file; |
22d38c4c BF |
5369 | return fl; |
5370 | } | |
5371 | ||
aba2072f BF |
5372 | static int nfsd4_check_conflicting_opens(struct nfs4_client *clp, |
5373 | struct nfs4_file *fp) | |
5374 | { | |
5375 | struct nfs4_ol_stateid *st; | |
5376 | struct file *f = fp->fi_deleg_file->nf_file; | |
c65454a9 | 5377 | struct inode *ino = file_inode(f); |
aba2072f BF |
5378 | int writes; |
5379 | ||
5380 | writes = atomic_read(&ino->i_writecount); | |
5381 | if (!writes) | |
5382 | return 0; | |
5383 | /* | |
5384 | * There could be multiple filehandles (hence multiple | |
5385 | * nfs4_files) referencing this file, but that's not too | |
5386 | * common; let's just give up in that case rather than | |
5387 | * trying to go look up all the clients using that other | |
5388 | * nfs4_file as well: | |
5389 | */ | |
5390 | if (fp->fi_aliased) | |
5391 | return -EAGAIN; | |
5392 | /* | |
5393 | * If there's a close in progress, make sure that we see it | |
5394 | * clear any fi_fds[] entries before we see it decrement | |
5395 | * i_writecount: | |
5396 | */ | |
5397 | smp_mb__after_atomic(); | |
5398 | ||
5399 | if (fp->fi_fds[O_WRONLY]) | |
5400 | writes--; | |
5401 | if (fp->fi_fds[O_RDWR]) | |
5402 | writes--; | |
5403 | if (writes > 0) | |
5404 | return -EAGAIN; /* There may be non-NFSv4 writers */ | |
5405 | /* | |
5406 | * It's possible there are non-NFSv4 write opens in progress, | |
5407 | * but if they haven't incremented i_writecount yet then they | |
5408 | * also haven't called break lease yet; so, they'll break this | |
5409 | * lease soon enough. So, all that's left to check for is NFSv4 | |
5410 | * opens: | |
5411 | */ | |
5412 | spin_lock(&fp->fi_lock); | |
5413 | list_for_each_entry(st, &fp->fi_stateids, st_perfile) { | |
5414 | if (st->st_openstp == NULL /* it's an open */ && | |
5415 | access_permit_write(st) && | |
5416 | st->st_stid.sc_client != clp) { | |
5417 | spin_unlock(&fp->fi_lock); | |
5418 | return -EAGAIN; | |
5419 | } | |
5420 | } | |
5421 | spin_unlock(&fp->fi_lock); | |
5422 | /* | |
5423 | * There's a small chance that we could be racing with another | |
5424 | * NFSv4 open. However, any open that hasn't added itself to | |
5425 | * the fi_stateids list also hasn't called break_lease yet; so, | |
5426 | * they'll break this lease soon enough. | |
5427 | */ | |
5428 | return 0; | |
5429 | } | |
5430 | ||
876c553c JL |
5431 | /* |
5432 | * It's possible that between opening the dentry and setting the delegation, | |
5433 | * that it has been renamed or unlinked. Redo the lookup to verify that this | |
5434 | * hasn't happened. | |
5435 | */ | |
5436 | static int | |
5437 | nfsd4_verify_deleg_dentry(struct nfsd4_open *open, struct nfs4_file *fp, | |
5438 | struct svc_fh *parent) | |
5439 | { | |
5440 | struct svc_export *exp; | |
5441 | struct dentry *child; | |
5442 | __be32 err; | |
5443 | ||
876c553c JL |
5444 | err = nfsd_lookup_dentry(open->op_rqstp, parent, |
5445 | open->op_fname, open->op_fnamelen, | |
5446 | &exp, &child); | |
5447 | ||
5448 | if (err) | |
5449 | return -EAGAIN; | |
5450 | ||
50256e47 | 5451 | exp_put(exp); |
876c553c JL |
5452 | dput(child); |
5453 | if (child != file_dentry(fp->fi_deleg_file->nf_file)) | |
5454 | return -EAGAIN; | |
5455 | ||
5456 | return 0; | |
5457 | } | |
5458 | ||
0b26693c | 5459 | static struct nfs4_delegation * |
876c553c JL |
5460 | nfs4_set_delegation(struct nfsd4_open *open, struct nfs4_ol_stateid *stp, |
5461 | struct svc_fh *parent) | |
acfdf5c3 | 5462 | { |
68b18f52 | 5463 | int status = 0; |
876c553c JL |
5464 | struct nfs4_client *clp = stp->st_stid.sc_client; |
5465 | struct nfs4_file *fp = stp->st_stid.sc_file; | |
5466 | struct nfs4_clnt_odstate *odstate = stp->st_clnt_odstate; | |
0b26693c | 5467 | struct nfs4_delegation *dp; |
eb82dd39 | 5468 | struct nfsd_file *nf; |
353601e7 | 5469 | struct file_lock *fl; |
417c6629 | 5470 | |
353601e7 BF |
5471 | /* |
5472 | * The fi_had_conflict and nfs_get_existing_delegation checks | |
5473 | * here are just optimizations; we'll need to recheck them at | |
5474 | * the end: | |
5475 | */ | |
bf7bd3e9 | 5476 | if (fp->fi_had_conflict) |
0b26693c JL |
5477 | return ERR_PTR(-EAGAIN); |
5478 | ||
eb82dd39 JL |
5479 | nf = find_readable_file(fp); |
5480 | if (!nf) { | |
aba2072f BF |
5481 | /* |
5482 | * We probably could attempt another open and get a read | |
5483 | * delegation, but for now, don't bother until the | |
5484 | * client actually sends us one. | |
5485 | */ | |
5486 | return ERR_PTR(-EAGAIN); | |
353601e7 | 5487 | } |
34ed9872 AE |
5488 | spin_lock(&state_lock); |
5489 | spin_lock(&fp->fi_lock); | |
68b18f52 BF |
5490 | if (nfs4_delegation_exists(clp, fp)) |
5491 | status = -EAGAIN; | |
353601e7 | 5492 | else if (!fp->fi_deleg_file) { |
eb82dd39 | 5493 | fp->fi_deleg_file = nf; |
353601e7 BF |
5494 | /* increment early to prevent fi_deleg_file from being |
5495 | * cleared */ | |
5496 | fp->fi_delegees = 1; | |
eb82dd39 | 5497 | nf = NULL; |
353601e7 BF |
5498 | } else |
5499 | fp->fi_delegees++; | |
34ed9872 AE |
5500 | spin_unlock(&fp->fi_lock); |
5501 | spin_unlock(&state_lock); | |
eb82dd39 JL |
5502 | if (nf) |
5503 | nfsd_file_put(nf); | |
34ed9872 AE |
5504 | if (status) |
5505 | return ERR_PTR(status); | |
5506 | ||
353601e7 | 5507 | status = -ENOMEM; |
bbf936ed | 5508 | dp = alloc_init_deleg(clp, fp, odstate); |
0b26693c | 5509 | if (!dp) |
353601e7 BF |
5510 | goto out_delegees; |
5511 | ||
5512 | fl = nfs4_alloc_init_lease(dp, NFS4_OPEN_DELEGATE_READ); | |
5513 | if (!fl) | |
bd8d7250 | 5514 | goto out_clnt_odstate; |
353601e7 | 5515 | |
eb82dd39 | 5516 | status = vfs_setlease(fp->fi_deleg_file->nf_file, fl->fl_type, &fl, NULL); |
353601e7 BF |
5517 | if (fl) |
5518 | locks_free_lock(fl); | |
5519 | if (status) | |
5520 | goto out_clnt_odstate; | |
876c553c JL |
5521 | |
5522 | if (parent) { | |
5523 | status = nfsd4_verify_deleg_dentry(open, fp, parent); | |
5524 | if (status) | |
5525 | goto out_unlock; | |
5526 | } | |
5527 | ||
aba2072f BF |
5528 | status = nfsd4_check_conflicting_opens(clp, fp); |
5529 | if (status) | |
5530 | goto out_unlock; | |
0b26693c | 5531 | |
417c6629 JL |
5532 | spin_lock(&state_lock); |
5533 | spin_lock(&fp->fi_lock); | |
353601e7 | 5534 | if (fp->fi_had_conflict) |
417c6629 | 5535 | status = -EAGAIN; |
353601e7 BF |
5536 | else |
5537 | status = hash_delegation_locked(dp, fp); | |
417c6629 | 5538 | spin_unlock(&fp->fi_lock); |
cdc97505 | 5539 | spin_unlock(&state_lock); |
353601e7 BF |
5540 | |
5541 | if (status) | |
692ad280 AE |
5542 | goto out_unlock; |
5543 | ||
0b26693c | 5544 | return dp; |
692ad280 | 5545 | out_unlock: |
eb82dd39 | 5546 | vfs_setlease(fp->fi_deleg_file->nf_file, F_UNLCK, NULL, (void **)&dp); |
353601e7 BF |
5547 | out_clnt_odstate: |
5548 | put_clnt_odstate(dp->dl_clnt_odstate); | |
353601e7 BF |
5549 | nfs4_put_stid(&dp->dl_stid); |
5550 | out_delegees: | |
5551 | put_deleg_file(fp); | |
5552 | return ERR_PTR(status); | |
edab9782 BF |
5553 | } |
5554 | ||
4aa8913c BH |
5555 | static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) |
5556 | { | |
5557 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
5558 | if (status == -EAGAIN) | |
5559 | open->op_why_no_deleg = WND4_CONTENTION; | |
5560 | else { | |
5561 | open->op_why_no_deleg = WND4_RESOURCE; | |
5562 | switch (open->op_deleg_want) { | |
5563 | case NFS4_SHARE_WANT_READ_DELEG: | |
5564 | case NFS4_SHARE_WANT_WRITE_DELEG: | |
5565 | case NFS4_SHARE_WANT_ANY_DELEG: | |
5566 | break; | |
5567 | case NFS4_SHARE_WANT_CANCEL: | |
5568 | open->op_why_no_deleg = WND4_CANCELLED; | |
5569 | break; | |
5570 | case NFS4_SHARE_WANT_NO_DELEG: | |
063b0fb9 | 5571 | WARN_ON_ONCE(1); |
4aa8913c BH |
5572 | } |
5573 | } | |
5574 | } | |
5575 | ||
1da177e4 LT |
5576 | /* |
5577 | * Attempt to hand out a delegation. | |
99c41515 BF |
5578 | * |
5579 | * Note we don't support write delegations, and won't until the vfs has | |
5580 | * proper support for them. | |
1da177e4 LT |
5581 | */ |
5582 | static void | |
876c553c JL |
5583 | nfs4_open_delegation(struct nfsd4_open *open, struct nfs4_ol_stateid *stp, |
5584 | struct svc_fh *currentfh) | |
1da177e4 LT |
5585 | { |
5586 | struct nfs4_delegation *dp; | |
4cf59221 JL |
5587 | struct nfs4_openowner *oo = openowner(stp->st_stateowner); |
5588 | struct nfs4_client *clp = stp->st_stid.sc_client; | |
876c553c | 5589 | struct svc_fh *parent = NULL; |
14a24e99 | 5590 | int cb_up; |
99c41515 | 5591 | int status = 0; |
1da177e4 | 5592 | |
fe0750e5 | 5593 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
7b190fec N |
5594 | open->op_recall = 0; |
5595 | switch (open->op_claim_type) { | |
5596 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 5597 | if (!cb_up) |
7b190fec | 5598 | open->op_recall = 1; |
99c41515 BF |
5599 | if (open->op_delegate_type != NFS4_OPEN_DELEGATE_READ) |
5600 | goto out_no_deleg; | |
7b190fec N |
5601 | break; |
5602 | case NFS4_OPEN_CLAIM_NULL: | |
876c553c JL |
5603 | parent = currentfh; |
5604 | fallthrough; | |
ed47b062 | 5605 | case NFS4_OPEN_CLAIM_FH: |
99c41515 BF |
5606 | /* |
5607 | * Let's not give out any delegations till everyone's | |
c87fb4a3 BF |
5608 | * had the chance to reclaim theirs, *and* until |
5609 | * NLM locks have all been reclaimed: | |
99c41515 | 5610 | */ |
4cf59221 | 5611 | if (locks_in_grace(clp->net)) |
99c41515 | 5612 | goto out_no_deleg; |
dad1c067 | 5613 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
99c41515 | 5614 | goto out_no_deleg; |
7b190fec N |
5615 | break; |
5616 | default: | |
99c41515 | 5617 | goto out_no_deleg; |
7b190fec | 5618 | } |
876c553c | 5619 | dp = nfs4_set_delegation(open, stp, parent); |
0b26693c | 5620 | if (IS_ERR(dp)) |
dd239cc0 | 5621 | goto out_no_deleg; |
1da177e4 | 5622 | |
d5477a8d | 5623 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 5624 | |
3caf9175 | 5625 | trace_nfsd_deleg_read(&dp->dl_stid.sc_stateid); |
99c41515 | 5626 | open->op_delegate_type = NFS4_OPEN_DELEGATE_READ; |
67cb1279 | 5627 | nfs4_put_stid(&dp->dl_stid); |
dd239cc0 | 5628 | return; |
dd239cc0 | 5629 | out_no_deleg: |
99c41515 BF |
5630 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE; |
5631 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && | |
d08d32e6 | 5632 | open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) { |
99c41515 | 5633 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
d08d32e6 BF |
5634 | open->op_recall = 1; |
5635 | } | |
99c41515 BF |
5636 | |
5637 | /* 4.1 client asking for a delegation? */ | |
5638 | if (open->op_deleg_want) | |
5639 | nfsd4_open_deleg_none_ext(open, status); | |
5640 | return; | |
1da177e4 LT |
5641 | } |
5642 | ||
e27f49c3 BH |
5643 | static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, |
5644 | struct nfs4_delegation *dp) | |
5645 | { | |
5646 | if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && | |
5647 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
5648 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
5649 | open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; | |
5650 | } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && | |
5651 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
5652 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
5653 | open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; | |
5654 | } | |
5655 | /* Otherwise the client must be confused wanting a delegation | |
5656 | * it already has, therefore we don't return | |
5657 | * NFS4_OPEN_DELEGATE_NONE_EXT and reason. | |
5658 | */ | |
5659 | } | |
5660 | ||
7e2ce0cc CL |
5661 | /** |
5662 | * nfsd4_process_open2 - finish open processing | |
5663 | * @rqstp: the RPC transaction being executed | |
5664 | * @current_fh: NFSv4 COMPOUND's current filehandle | |
5665 | * @open: OPEN arguments | |
5666 | * | |
5667 | * If successful, (1) truncate the file if open->op_truncate was | |
5668 | * set, (2) set open->op_stateid, (3) set open->op_delegation. | |
5669 | * | |
5670 | * Returns %nfs_ok on success; otherwise an nfs4stat value in | |
5671 | * network byte order is returned. | |
5672 | */ | |
b37ad28b | 5673 | __be32 |
1da177e4 LT |
5674 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
5675 | { | |
6668958f | 5676 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
38c2f4b1 | 5677 | struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; |
1da177e4 | 5678 | struct nfs4_file *fp = NULL; |
dcef0413 | 5679 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 5680 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 5681 | __be32 status; |
d8a1a000 | 5682 | bool new_stp = false; |
1da177e4 | 5683 | |
1da177e4 LT |
5684 | /* |
5685 | * Lookup file; if found, lookup stateid and check open request, | |
5686 | * and check for delegations in the process of being recalled. | |
5687 | * If not found, create the nfs4_file struct | |
5688 | */ | |
9270fc51 | 5689 | fp = nfsd4_file_hash_insert(open->op_file, current_fh); |
d47b295e CL |
5690 | if (unlikely(!fp)) |
5691 | return nfserr_jukebox; | |
950e0118 | 5692 | if (fp != open->op_file) { |
41d22663 | 5693 | status = nfs4_check_deleg(cl, open, &dp); |
c44c5eeb N |
5694 | if (status) |
5695 | goto out; | |
15ca08d3 | 5696 | stp = nfsd4_find_and_lock_existing_open(fp, open); |
1da177e4 | 5697 | } else { |
950e0118 | 5698 | open->op_file = NULL; |
c44c5eeb | 5699 | status = nfserr_bad_stateid; |
8b289b2c | 5700 | if (nfsd4_is_deleg_cur(open)) |
c44c5eeb | 5701 | goto out; |
1da177e4 LT |
5702 | } |
5703 | ||
d8a1a000 TM |
5704 | if (!stp) { |
5705 | stp = init_open_stateid(fp, open); | |
5706 | if (!open->op_stp) | |
5707 | new_stp = true; | |
5708 | } | |
5709 | ||
1da177e4 LT |
5710 | /* |
5711 | * OPEN the file, or upgrade an existing OPEN. | |
5712 | * If truncate fails, the OPEN fails. | |
d8a1a000 TM |
5713 | * |
5714 | * stp is already locked. | |
1da177e4 | 5715 | */ |
d8a1a000 | 5716 | if (!new_stp) { |
1da177e4 | 5717 | /* Stateid was found, this is an OPEN upgrade */ |
f9d7562f | 5718 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
35a92fe8 | 5719 | if (status) { |
feb9dad5 | 5720 | mutex_unlock(&stp->st_mutex); |
1da177e4 | 5721 | goto out; |
35a92fe8 | 5722 | } |
1da177e4 | 5723 | } else { |
3d694271 | 5724 | status = nfs4_get_vfs_file(rqstp, fp, current_fh, stp, open, true); |
6eb3a1d0 | 5725 | if (status) { |
d8a1a000 | 5726 | stp->st_stid.sc_type = NFS4_CLOSED_STID; |
6eb3a1d0 | 5727 | release_open_stateid(stp); |
d8a1a000 | 5728 | mutex_unlock(&stp->st_mutex); |
6eb3a1d0 JL |
5729 | goto out; |
5730 | } | |
8287f009 SB |
5731 | |
5732 | stp->st_clnt_odstate = find_or_hash_clnt_odstate(fp, | |
5733 | open->op_odstate); | |
5734 | if (stp->st_clnt_odstate == open->op_odstate) | |
5735 | open->op_odstate = NULL; | |
1da177e4 | 5736 | } |
d8a1a000 | 5737 | |
9767feb2 | 5738 | nfs4_inc_and_copy_stateid(&open->op_stateid, &stp->st_stid); |
feb9dad5 | 5739 | mutex_unlock(&stp->st_mutex); |
1da177e4 | 5740 | |
d24433cd | 5741 | if (nfsd4_has_session(&resp->cstate)) { |
d24433cd BH |
5742 | if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { |
5743 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
5744 | open->op_why_no_deleg = WND4_NOT_WANTED; | |
5745 | goto nodeleg; | |
5746 | } | |
5747 | } | |
5748 | ||
1da177e4 LT |
5749 | /* |
5750 | * Attempt to hand out a delegation. No error return, because the | |
5751 | * OPEN succeeds even if we fail. | |
5752 | */ | |
876c553c | 5753 | nfs4_open_delegation(open, stp, &resp->cstate.current_fh); |
d24433cd | 5754 | nodeleg: |
1da177e4 | 5755 | status = nfs_ok; |
3caf9175 | 5756 | trace_nfsd_open(&stp->st_stid.sc_stateid); |
1da177e4 | 5757 | out: |
d24433cd BH |
5758 | /* 4.1 client trying to upgrade/downgrade delegation? */ |
5759 | if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && | |
e27f49c3 BH |
5760 | open->op_deleg_want) |
5761 | nfsd4_deleg_xgrade_none_ext(open, dp); | |
d24433cd | 5762 | |
13cd2184 N |
5763 | if (fp) |
5764 | put_nfs4_file(fp); | |
37515177 | 5765 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
87186022 | 5766 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
1da177e4 LT |
5767 | /* |
5768 | * To finish the open response, we just need to set the rflags. | |
5769 | */ | |
5770 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
19e4c347 JL |
5771 | if (nfsd4_has_session(&resp->cstate)) |
5772 | open->op_rflags |= NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK; | |
5773 | else if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED)) | |
1da177e4 | 5774 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
19e4c347 | 5775 | |
dcd94cc2 TM |
5776 | if (dp) |
5777 | nfs4_put_stid(&dp->dl_stid); | |
d6f2bc5d TM |
5778 | if (stp) |
5779 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 LT |
5780 | |
5781 | return status; | |
5782 | } | |
5783 | ||
58fb12e6 | 5784 | void nfsd4_cleanup_open_state(struct nfsd4_compound_state *cstate, |
42297899 | 5785 | struct nfsd4_open *open) |
d29b20cd BF |
5786 | { |
5787 | if (open->op_openowner) { | |
d3134b10 JL |
5788 | struct nfs4_stateowner *so = &open->op_openowner->oo_owner; |
5789 | ||
5790 | nfsd4_cstate_assign_replay(cstate, so); | |
5791 | nfs4_put_stateowner(so); | |
d29b20cd | 5792 | } |
32513b40 | 5793 | if (open->op_file) |
5b095e99 | 5794 | kmem_cache_free(file_slab, open->op_file); |
4cdc951b | 5795 | if (open->op_stp) |
6011695d | 5796 | nfs4_put_stid(&open->op_stp->st_stid); |
8287f009 SB |
5797 | if (open->op_odstate) |
5798 | kmem_cache_free(odstate_slab, open->op_odstate); | |
d29b20cd BF |
5799 | } |
5800 | ||
b37ad28b | 5801 | __be32 |
b591480b | 5802 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 5803 | union nfsd4_op_u *u) |
1da177e4 | 5804 | { |
eb69853d | 5805 | clientid_t *clid = &u->renew; |
1da177e4 | 5806 | struct nfs4_client *clp; |
b37ad28b | 5807 | __be32 status; |
7f2210fa | 5808 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 5809 | |
dd5e3fbc | 5810 | trace_nfsd_clid_renew(clid); |
f71475ba | 5811 | status = set_client(clid, cstate, nn); |
9b2ef62b | 5812 | if (status) |
b4587eb2 | 5813 | return status; |
4b24ca7d | 5814 | clp = cstate->clp; |
ea1da636 | 5815 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 5816 | && clp->cl_cb_state != NFSD4_CB_UP) |
b4587eb2 BF |
5817 | return nfserr_cb_path_down; |
5818 | return nfs_ok; | |
1da177e4 LT |
5819 | } |
5820 | ||
7f5ef2e9 | 5821 | void |
12760c66 | 5822 | nfsd4_end_grace(struct nfsd_net *nn) |
a76b4319 | 5823 | { |
33dcc481 | 5824 | /* do nothing if grace period already ended */ |
a51c84ed | 5825 | if (nn->grace_ended) |
33dcc481 JL |
5826 | return; |
5827 | ||
dd5e3fbc | 5828 | trace_nfsd_grace_complete(nn); |
a51c84ed | 5829 | nn->grace_ended = true; |
70b28235 BF |
5830 | /* |
5831 | * If the server goes down again right now, an NFSv4 | |
5832 | * client will still be allowed to reclaim after it comes back up, | |
5833 | * even if it hasn't yet had a chance to reclaim state this time. | |
5834 | * | |
5835 | */ | |
919b8049 | 5836 | nfsd4_record_grace_done(nn); |
70b28235 BF |
5837 | /* |
5838 | * At this point, NFSv4 clients can still reclaim. But if the | |
5839 | * server crashes, any that have not yet reclaimed will be out | |
5840 | * of luck on the next boot. | |
5841 | * | |
5842 | * (NFSv4.1+ clients are considered to have reclaimed once they | |
5843 | * call RECLAIM_COMPLETE. NFSv4.0 clients are considered to | |
5844 | * have reclaimed after their first OPEN.) | |
5845 | */ | |
5e1533c7 | 5846 | locks_end_grace(&nn->nfsd4_manager); |
70b28235 BF |
5847 | /* |
5848 | * At this point, and once lockd and/or any other containers | |
5849 | * exit their grace period, further reclaims will fail and | |
5850 | * regular locking can resume. | |
5851 | */ | |
a76b4319 N |
5852 | } |
5853 | ||
03f318ca BF |
5854 | /* |
5855 | * If we've waited a lease period but there are still clients trying to | |
5856 | * reclaim, wait a little longer to give them a chance to finish. | |
5857 | */ | |
5858 | static bool clients_still_reclaiming(struct nfsd_net *nn) | |
5859 | { | |
20b7d86f AB |
5860 | time64_t double_grace_period_end = nn->boot_time + |
5861 | 2 * nn->nfsd4_lease; | |
03f318ca | 5862 | |
362063a5 SM |
5863 | if (nn->track_reclaim_completes && |
5864 | atomic_read(&nn->nr_reclaim_complete) == | |
5865 | nn->reclaim_str_hashtbl_size) | |
5866 | return false; | |
03f318ca BF |
5867 | if (!nn->somebody_reclaimed) |
5868 | return false; | |
5869 | nn->somebody_reclaimed = false; | |
5870 | /* | |
5871 | * If we've given them *two* lease times to reclaim, and they're | |
5872 | * still not done, give up: | |
5873 | */ | |
20b7d86f | 5874 | if (ktime_get_boottime_seconds() > double_grace_period_end) |
03f318ca BF |
5875 | return false; |
5876 | return true; | |
5877 | } | |
5878 | ||
7f7e7a40 BF |
5879 | struct laundry_time { |
5880 | time64_t cutoff; | |
5881 | time64_t new_timeo; | |
5882 | }; | |
5883 | ||
5884 | static bool state_expired(struct laundry_time *lt, time64_t last_refresh) | |
5885 | { | |
5886 | time64_t time_remaining; | |
5887 | ||
5888 | if (last_refresh < lt->cutoff) | |
5889 | return true; | |
5890 | time_remaining = last_refresh - lt->cutoff; | |
5891 | lt->new_timeo = min(lt->new_timeo, time_remaining); | |
5892 | return false; | |
5893 | } | |
5894 | ||
f4e44b39 DN |
5895 | #ifdef CONFIG_NFSD_V4_2_INTER_SSC |
5896 | void nfsd4_ssc_init_umount_work(struct nfsd_net *nn) | |
5897 | { | |
5898 | spin_lock_init(&nn->nfsd_ssc_lock); | |
5899 | INIT_LIST_HEAD(&nn->nfsd_ssc_mount_list); | |
5900 | init_waitqueue_head(&nn->nfsd_ssc_waitq); | |
5901 | } | |
5902 | EXPORT_SYMBOL_GPL(nfsd4_ssc_init_umount_work); | |
5903 | ||
5904 | /* | |
5905 | * This is called when nfsd is being shutdown, after all inter_ssc | |
5906 | * cleanup were done, to destroy the ssc delayed unmount list. | |
5907 | */ | |
5908 | static void nfsd4_ssc_shutdown_umount(struct nfsd_net *nn) | |
5909 | { | |
f47dc2d3 | 5910 | struct nfsd4_ssc_umount_item *ni = NULL; |
f4e44b39 DN |
5911 | struct nfsd4_ssc_umount_item *tmp; |
5912 | ||
5913 | spin_lock(&nn->nfsd_ssc_lock); | |
5914 | list_for_each_entry_safe(ni, tmp, &nn->nfsd_ssc_mount_list, nsui_list) { | |
5915 | list_del(&ni->nsui_list); | |
5916 | spin_unlock(&nn->nfsd_ssc_lock); | |
5917 | mntput(ni->nsui_vfsmount); | |
5918 | kfree(ni); | |
5919 | spin_lock(&nn->nfsd_ssc_lock); | |
5920 | } | |
5921 | spin_unlock(&nn->nfsd_ssc_lock); | |
5922 | } | |
5923 | ||
5924 | static void nfsd4_ssc_expire_umount(struct nfsd_net *nn) | |
5925 | { | |
5926 | bool do_wakeup = false; | |
8e70bf27 | 5927 | struct nfsd4_ssc_umount_item *ni = NULL; |
f4e44b39 DN |
5928 | struct nfsd4_ssc_umount_item *tmp; |
5929 | ||
5930 | spin_lock(&nn->nfsd_ssc_lock); | |
5931 | list_for_each_entry_safe(ni, tmp, &nn->nfsd_ssc_mount_list, nsui_list) { | |
5932 | if (time_after(jiffies, ni->nsui_expire)) { | |
5933 | if (refcount_read(&ni->nsui_refcnt) > 1) | |
5934 | continue; | |
5935 | ||
5936 | /* mark being unmount */ | |
5937 | ni->nsui_busy = true; | |
5938 | spin_unlock(&nn->nfsd_ssc_lock); | |
5939 | mntput(ni->nsui_vfsmount); | |
5940 | spin_lock(&nn->nfsd_ssc_lock); | |
5941 | ||
5942 | /* waiters need to start from begin of list */ | |
5943 | list_del(&ni->nsui_list); | |
5944 | kfree(ni); | |
5945 | ||
5946 | /* wakeup ssc_connect waiters */ | |
5947 | do_wakeup = true; | |
5948 | continue; | |
5949 | } | |
5950 | break; | |
5951 | } | |
5952 | if (do_wakeup) | |
5953 | wake_up_all(&nn->nfsd_ssc_waitq); | |
5954 | spin_unlock(&nn->nfsd_ssc_lock); | |
5955 | } | |
5956 | #endif | |
5957 | ||
27431aff | 5958 | /* Check if any lock belonging to this lockowner has any blockers */ |
3d694271 | 5959 | static bool |
27431aff DN |
5960 | nfs4_lockowner_has_blockers(struct nfs4_lockowner *lo) |
5961 | { | |
5962 | struct file_lock_context *ctx; | |
5963 | struct nfs4_ol_stateid *stp; | |
5964 | struct nfs4_file *nf; | |
5965 | ||
5966 | list_for_each_entry(stp, &lo->lo_owner.so_stateids, st_perstateowner) { | |
5967 | nf = stp->st_stid.sc_file; | |
77c67530 | 5968 | ctx = locks_inode_context(nf->fi_inode); |
27431aff DN |
5969 | if (!ctx) |
5970 | continue; | |
5971 | if (locks_owner_has_blockers(ctx, lo)) | |
5972 | return true; | |
5973 | } | |
5974 | return false; | |
5975 | } | |
5976 | ||
5977 | static bool | |
5978 | nfs4_anylock_blockers(struct nfs4_client *clp) | |
3d694271 DN |
5979 | { |
5980 | int i; | |
5981 | struct nfs4_stateowner *so; | |
27431aff | 5982 | struct nfs4_lockowner *lo; |
3d694271 | 5983 | |
27431aff DN |
5984 | if (atomic_read(&clp->cl_delegs_in_recall)) |
5985 | return true; | |
3d694271 DN |
5986 | spin_lock(&clp->cl_lock); |
5987 | for (i = 0; i < OWNER_HASH_SIZE; i++) { | |
5988 | list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[i], | |
5989 | so_strhash) { | |
5990 | if (so->so_is_open_owner) | |
5991 | continue; | |
27431aff DN |
5992 | lo = lockowner(so); |
5993 | if (nfs4_lockowner_has_blockers(lo)) { | |
5994 | spin_unlock(&clp->cl_lock); | |
5995 | return true; | |
5996 | } | |
3d694271 DN |
5997 | } |
5998 | } | |
5999 | spin_unlock(&clp->cl_lock); | |
6000 | return false; | |
6001 | } | |
6002 | ||
66af2579 DN |
6003 | static void |
6004 | nfs4_get_client_reaplist(struct nfsd_net *nn, struct list_head *reaplist, | |
6005 | struct laundry_time *lt) | |
6006 | { | |
4271c2c0 | 6007 | unsigned int maxreap, reapcnt = 0; |
66af2579 DN |
6008 | struct list_head *pos, *next; |
6009 | struct nfs4_client *clp; | |
6010 | ||
4271c2c0 DN |
6011 | maxreap = (atomic_read(&nn->nfs4_client_count) >= nn->nfs4_max_clients) ? |
6012 | NFSD_CLIENT_MAX_TRIM_PER_RUN : 0; | |
66af2579 DN |
6013 | INIT_LIST_HEAD(reaplist); |
6014 | spin_lock(&nn->client_lock); | |
6015 | list_for_each_safe(pos, next, &nn->client_lru) { | |
6016 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
6017 | if (clp->cl_state == NFSD4_EXPIRABLE) | |
6018 | goto exp_client; | |
6019 | if (!state_expired(lt, clp->cl_time)) | |
6020 | break; | |
3a4ea23d DN |
6021 | if (!atomic_read(&clp->cl_rpc_users)) { |
6022 | if (clp->cl_state == NFSD4_ACTIVE) | |
6023 | atomic_inc(&nn->nfsd_courtesy_clients); | |
66af2579 | 6024 | clp->cl_state = NFSD4_COURTESY; |
3a4ea23d | 6025 | } |
4271c2c0 | 6026 | if (!client_has_state(clp)) |
66af2579 | 6027 | goto exp_client; |
4271c2c0 DN |
6028 | if (!nfs4_anylock_blockers(clp)) |
6029 | if (reapcnt >= maxreap) | |
6030 | continue; | |
66af2579 | 6031 | exp_client: |
4271c2c0 DN |
6032 | if (!mark_client_expired_locked(clp)) { |
6033 | list_add(&clp->cl_lru, reaplist); | |
6034 | reapcnt++; | |
66af2579 DN |
6035 | } |
6036 | } | |
6037 | spin_unlock(&nn->client_lock); | |
6038 | } | |
6039 | ||
7746b32f DN |
6040 | static void |
6041 | nfs4_get_courtesy_client_reaplist(struct nfsd_net *nn, | |
6042 | struct list_head *reaplist) | |
6043 | { | |
6044 | unsigned int maxreap = 0, reapcnt = 0; | |
6045 | struct list_head *pos, *next; | |
6046 | struct nfs4_client *clp; | |
6047 | ||
6048 | maxreap = NFSD_CLIENT_MAX_TRIM_PER_RUN; | |
6049 | INIT_LIST_HEAD(reaplist); | |
6050 | ||
6051 | spin_lock(&nn->client_lock); | |
6052 | list_for_each_safe(pos, next, &nn->client_lru) { | |
6053 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
6054 | if (clp->cl_state == NFSD4_ACTIVE) | |
6055 | break; | |
6056 | if (reapcnt >= maxreap) | |
6057 | break; | |
6058 | if (!mark_client_expired_locked(clp)) { | |
6059 | list_add(&clp->cl_lru, reaplist); | |
6060 | reapcnt++; | |
6061 | } | |
6062 | } | |
6063 | spin_unlock(&nn->client_lock); | |
6064 | } | |
6065 | ||
6066 | static void | |
6067 | nfs4_process_client_reaplist(struct list_head *reaplist) | |
6068 | { | |
6069 | struct list_head *pos, *next; | |
6070 | struct nfs4_client *clp; | |
6071 | ||
6072 | list_for_each_safe(pos, next, reaplist) { | |
6073 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
6074 | trace_nfsd_clid_purged(&clp->cl_clientid); | |
6075 | list_del_init(&clp->cl_lru); | |
6076 | expire_client(clp); | |
6077 | } | |
6078 | } | |
6079 | ||
20b7d86f | 6080 | static time64_t |
09121281 | 6081 | nfs4_laundromat(struct nfsd_net *nn) |
1da177e4 | 6082 | { |
fe0750e5 | 6083 | struct nfs4_openowner *oo; |
1da177e4 | 6084 | struct nfs4_delegation *dp; |
217526e7 | 6085 | struct nfs4_ol_stateid *stp; |
7919d0a2 | 6086 | struct nfsd4_blocked_lock *nbl; |
1da177e4 | 6087 | struct list_head *pos, *next, reaplist; |
7f7e7a40 BF |
6088 | struct laundry_time lt = { |
6089 | .cutoff = ktime_get_boottime_seconds() - nn->nfsd4_lease, | |
6090 | .new_timeo = nn->nfsd4_lease | |
6091 | }; | |
624322f1 OK |
6092 | struct nfs4_cpntf_state *cps; |
6093 | copy_stateid_t *cps_t; | |
6094 | int i; | |
1da177e4 | 6095 | |
03f318ca | 6096 | if (clients_still_reclaiming(nn)) { |
7f7e7a40 | 6097 | lt.new_timeo = 0; |
03f318ca BF |
6098 | goto out; |
6099 | } | |
12760c66 | 6100 | nfsd4_end_grace(nn); |
624322f1 OK |
6101 | |
6102 | spin_lock(&nn->s2s_cp_lock); | |
6103 | idr_for_each_entry(&nn->s2s_cp_stateids, cps_t, i) { | |
6104 | cps = container_of(cps_t, struct nfs4_cpntf_state, cp_stateid); | |
781fde1a | 6105 | if (cps->cp_stateid.cs_type == NFS4_COPYNOTIFY_STID && |
7f7e7a40 | 6106 | state_expired(<, cps->cpntf_time)) |
624322f1 OK |
6107 | _free_cpntf_state_locked(nn, cps); |
6108 | } | |
6109 | spin_unlock(&nn->s2s_cp_lock); | |
66af2579 | 6110 | nfs4_get_client_reaplist(nn, &reaplist, <); |
7746b32f DN |
6111 | nfs4_process_client_reaplist(&reaplist); |
6112 | ||
cdc97505 | 6113 | spin_lock(&state_lock); |
e8c69d17 | 6114 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 | 6115 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
7f7e7a40 | 6116 | if (!state_expired(<, dp->dl_time)) |
1da177e4 | 6117 | break; |
3fcbbd24 | 6118 | WARN_ON(!unhash_delegation_locked(dp)); |
42690676 | 6119 | list_add(&dp->dl_recall_lru, &reaplist); |
1da177e4 | 6120 | } |
cdc97505 | 6121 | spin_unlock(&state_lock); |
2d4a532d JL |
6122 | while (!list_empty(&reaplist)) { |
6123 | dp = list_first_entry(&reaplist, struct nfs4_delegation, | |
6124 | dl_recall_lru); | |
6125 | list_del_init(&dp->dl_recall_lru); | |
3bd64a5b | 6126 | revoke_delegation(dp); |
1da177e4 | 6127 | } |
217526e7 JL |
6128 | |
6129 | spin_lock(&nn->client_lock); | |
6130 | while (!list_empty(&nn->close_lru)) { | |
6131 | oo = list_first_entry(&nn->close_lru, struct nfs4_openowner, | |
6132 | oo_close_lru); | |
7f7e7a40 | 6133 | if (!state_expired(<, oo->oo_time)) |
1da177e4 | 6134 | break; |
217526e7 JL |
6135 | list_del_init(&oo->oo_close_lru); |
6136 | stp = oo->oo_last_closed_stid; | |
6137 | oo->oo_last_closed_stid = NULL; | |
6138 | spin_unlock(&nn->client_lock); | |
6139 | nfs4_put_stid(&stp->st_stid); | |
6140 | spin_lock(&nn->client_lock); | |
1da177e4 | 6141 | } |
217526e7 JL |
6142 | spin_unlock(&nn->client_lock); |
6143 | ||
7919d0a2 JL |
6144 | /* |
6145 | * It's possible for a client to try and acquire an already held lock | |
6146 | * that is being held for a long time, and then lose interest in it. | |
6147 | * So, we clean out any un-revisited request after a lease period | |
6148 | * under the assumption that the client is no longer interested. | |
6149 | * | |
6150 | * RFC5661, sec. 9.6 states that the client must not rely on getting | |
6151 | * notifications and must continue to poll for locks, even when the | |
6152 | * server supports them. Thus this shouldn't lead to clients blocking | |
6153 | * indefinitely once the lock does become free. | |
6154 | */ | |
6155 | BUG_ON(!list_empty(&reaplist)); | |
0cc11a61 | 6156 | spin_lock(&nn->blocked_locks_lock); |
7919d0a2 JL |
6157 | while (!list_empty(&nn->blocked_locks_lru)) { |
6158 | nbl = list_first_entry(&nn->blocked_locks_lru, | |
6159 | struct nfsd4_blocked_lock, nbl_lru); | |
7f7e7a40 | 6160 | if (!state_expired(<, nbl->nbl_time)) |
7919d0a2 | 6161 | break; |
7919d0a2 JL |
6162 | list_move(&nbl->nbl_lru, &reaplist); |
6163 | list_del_init(&nbl->nbl_list); | |
6164 | } | |
0cc11a61 | 6165 | spin_unlock(&nn->blocked_locks_lock); |
7919d0a2 JL |
6166 | |
6167 | while (!list_empty(&reaplist)) { | |
64ebe124 | 6168 | nbl = list_first_entry(&reaplist, |
7919d0a2 JL |
6169 | struct nfsd4_blocked_lock, nbl_lru); |
6170 | list_del_init(&nbl->nbl_lru); | |
7919d0a2 JL |
6171 | free_blocked_lock(nbl); |
6172 | } | |
f4e44b39 DN |
6173 | #ifdef CONFIG_NFSD_V4_2_INTER_SSC |
6174 | /* service the server-to-server copy delayed unmount list */ | |
6175 | nfsd4_ssc_expire_umount(nn); | |
6176 | #endif | |
03f318ca | 6177 | out: |
7f7e7a40 | 6178 | return max_t(time64_t, lt.new_timeo, NFSD_LAUNDROMAT_MINTIMEOUT); |
1da177e4 LT |
6179 | } |
6180 | ||
a254b246 | 6181 | static void laundromat_main(struct work_struct *); |
a254b246 HH |
6182 | |
6183 | static void | |
09121281 | 6184 | laundromat_main(struct work_struct *laundry) |
1da177e4 | 6185 | { |
20b7d86f | 6186 | time64_t t; |
2e55f3ab | 6187 | struct delayed_work *dwork = to_delayed_work(laundry); |
09121281 SK |
6188 | struct nfsd_net *nn = container_of(dwork, struct nfsd_net, |
6189 | laundromat_work); | |
1da177e4 | 6190 | |
09121281 | 6191 | t = nfs4_laundromat(nn); |
09121281 | 6192 | queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ); |
1da177e4 LT |
6193 | } |
6194 | ||
7746b32f | 6195 | static void |
a1049eb4 | 6196 | courtesy_client_reaper(struct nfsd_net *nn) |
7746b32f DN |
6197 | { |
6198 | struct list_head reaplist; | |
7746b32f DN |
6199 | |
6200 | nfs4_get_courtesy_client_reaplist(nn, &reaplist); | |
6201 | nfs4_process_client_reaplist(&reaplist); | |
6202 | } | |
6203 | ||
44df6f43 DN |
6204 | static void |
6205 | deleg_reaper(struct nfsd_net *nn) | |
6206 | { | |
6207 | struct list_head *pos, *next; | |
6208 | struct nfs4_client *clp; | |
6209 | struct list_head cblist; | |
6210 | ||
6211 | INIT_LIST_HEAD(&cblist); | |
6212 | spin_lock(&nn->client_lock); | |
6213 | list_for_each_safe(pos, next, &nn->client_lru) { | |
6214 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
6215 | if (clp->cl_state != NFSD4_ACTIVE || | |
6216 | list_empty(&clp->cl_delegations) || | |
6217 | atomic_read(&clp->cl_delegs_in_recall) || | |
6218 | test_bit(NFSD4_CLIENT_CB_RECALL_ANY, &clp->cl_flags) || | |
6219 | (ktime_get_boottime_seconds() - | |
6220 | clp->cl_ra_time < 5)) { | |
6221 | continue; | |
6222 | } | |
6223 | list_add(&clp->cl_ra_cblist, &cblist); | |
6224 | ||
6225 | /* release in nfsd4_cb_recall_any_release */ | |
6226 | atomic_inc(&clp->cl_rpc_users); | |
6227 | set_bit(NFSD4_CLIENT_CB_RECALL_ANY, &clp->cl_flags); | |
6228 | clp->cl_ra_time = ktime_get_boottime_seconds(); | |
6229 | } | |
6230 | spin_unlock(&nn->client_lock); | |
6231 | ||
6232 | while (!list_empty(&cblist)) { | |
6233 | clp = list_first_entry(&cblist, struct nfs4_client, | |
6234 | cl_ra_cblist); | |
6235 | list_del_init(&clp->cl_ra_cblist); | |
6236 | clp->cl_ra->ra_keep = 0; | |
6237 | clp->cl_ra->ra_bmval[0] = BIT(RCA4_TYPE_MASK_RDATA_DLG); | |
638593be | 6238 | trace_nfsd_cb_recall_any(clp->cl_ra); |
44df6f43 DN |
6239 | nfsd4_run_cb(&clp->cl_ra->ra_cb); |
6240 | } | |
6241 | } | |
6242 | ||
a1049eb4 DN |
6243 | static void |
6244 | nfsd4_state_shrinker_worker(struct work_struct *work) | |
6245 | { | |
6246 | struct delayed_work *dwork = to_delayed_work(work); | |
6247 | struct nfsd_net *nn = container_of(dwork, struct nfsd_net, | |
6248 | nfsd_shrinker_work); | |
6249 | ||
6250 | courtesy_client_reaper(nn); | |
44df6f43 | 6251 | deleg_reaper(nn); |
a1049eb4 DN |
6252 | } |
6253 | ||
8fcd461d | 6254 | static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stid *stp) |
1da177e4 | 6255 | { |
8fcd461d | 6256 | if (!fh_match(&fhp->fh_handle, &stp->sc_file->fi_fhandle)) |
f7a4d872 BF |
6257 | return nfserr_bad_stateid; |
6258 | return nfs_ok; | |
1da177e4 LT |
6259 | } |
6260 | ||
1da177e4 | 6261 | static |
dcef0413 | 6262 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
1da177e4 | 6263 | { |
b37ad28b | 6264 | __be32 status = nfserr_openmode; |
1da177e4 | 6265 | |
02921914 BF |
6266 | /* For lock stateid's, we test the parent open, not the lock: */ |
6267 | if (stp->st_openstp) | |
6268 | stp = stp->st_openstp; | |
82c5ff1b | 6269 | if ((flags & WR_STATE) && !access_permit_write(stp)) |
1da177e4 | 6270 | goto out; |
82c5ff1b | 6271 | if ((flags & RD_STATE) && !access_permit_read(stp)) |
1da177e4 LT |
6272 | goto out; |
6273 | status = nfs_ok; | |
6274 | out: | |
6275 | return status; | |
6276 | } | |
6277 | ||
b37ad28b | 6278 | static inline __be32 |
5ccb0066 | 6279 | check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags) |
1da177e4 | 6280 | { |
203a8c8e | 6281 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 6282 | return nfs_ok; |
c87fb4a3 | 6283 | else if (opens_in_grace(net)) { |
25985edc | 6284 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
6285 | * conflicting state; so we must wait out the grace period. */ |
6286 | return nfserr_grace; | |
6287 | } else if (flags & WR_STATE) | |
6288 | return nfs4_share_conflict(current_fh, | |
6289 | NFS4_SHARE_DENY_WRITE); | |
6290 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
6291 | return nfs4_share_conflict(current_fh, | |
6292 | NFS4_SHARE_DENY_READ); | |
6293 | } | |
6294 | ||
57b7b43b | 6295 | static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 6296 | { |
6668958f AA |
6297 | /* |
6298 | * When sessions are used the stateid generation number is ignored | |
6299 | * when it is zero. | |
6300 | */ | |
28dde241 | 6301 | if (has_session && in->si_generation == 0) |
81b82965 BF |
6302 | return nfs_ok; |
6303 | ||
6304 | if (in->si_generation == ref->si_generation) | |
6305 | return nfs_ok; | |
6668958f | 6306 | |
0836f587 | 6307 | /* If the client sends us a stateid from the future, it's buggy: */ |
14b7f4a1 | 6308 | if (nfsd4_stateid_generation_after(in, ref)) |
0836f587 BF |
6309 | return nfserr_bad_stateid; |
6310 | /* | |
81b82965 BF |
6311 | * However, we could see a stateid from the past, even from a |
6312 | * non-buggy client. For example, if the client sends a lock | |
6313 | * while some IO is outstanding, the lock may bump si_generation | |
6314 | * while the IO is still in flight. The client could avoid that | |
6315 | * situation by waiting for responses on all the IO requests, | |
6316 | * but better performance may result in retrying IO that | |
6317 | * receives an old_stateid error if requests are rarely | |
6318 | * reordered in flight: | |
0836f587 | 6319 | */ |
81b82965 | 6320 | return nfserr_old_stateid; |
0836f587 BF |
6321 | } |
6322 | ||
03da3169 TM |
6323 | static __be32 nfsd4_stid_check_stateid_generation(stateid_t *in, struct nfs4_stid *s, bool has_session) |
6324 | { | |
6325 | __be32 ret; | |
6326 | ||
6327 | spin_lock(&s->sc_lock); | |
6328 | ret = nfsd4_verify_open_stid(s); | |
6329 | if (ret == nfs_ok) | |
6330 | ret = check_stateid_generation(in, &s->sc_stateid, has_session); | |
6331 | spin_unlock(&s->sc_lock); | |
6332 | return ret; | |
6333 | } | |
6334 | ||
ebe9cb3b CH |
6335 | static __be32 nfsd4_check_openowner_confirmed(struct nfs4_ol_stateid *ols) |
6336 | { | |
6337 | if (ols->st_stateowner->so_is_open_owner && | |
6338 | !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) | |
6339 | return nfserr_bad_stateid; | |
6340 | return nfs_ok; | |
6341 | } | |
6342 | ||
7df302f7 | 6343 | static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) |
17456804 | 6344 | { |
97b7e3b6 | 6345 | struct nfs4_stid *s; |
1af71cc8 | 6346 | __be32 status = nfserr_bad_stateid; |
17456804 | 6347 | |
ae254dac AE |
6348 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid) || |
6349 | CLOSE_STATEID(stateid)) | |
1af71cc8 | 6350 | return status; |
663e36f0 | 6351 | if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) |
1af71cc8 | 6352 | return status; |
1af71cc8 JL |
6353 | spin_lock(&cl->cl_lock); |
6354 | s = find_stateid_locked(cl, stateid); | |
97b7e3b6 | 6355 | if (!s) |
1af71cc8 | 6356 | goto out_unlock; |
03da3169 | 6357 | status = nfsd4_stid_check_stateid_generation(stateid, s, 1); |
17456804 | 6358 | if (status) |
1af71cc8 | 6359 | goto out_unlock; |
23340032 BF |
6360 | switch (s->sc_type) { |
6361 | case NFS4_DELEG_STID: | |
1af71cc8 JL |
6362 | status = nfs_ok; |
6363 | break; | |
3bd64a5b | 6364 | case NFS4_REVOKED_DELEG_STID: |
1af71cc8 JL |
6365 | status = nfserr_deleg_revoked; |
6366 | break; | |
23340032 BF |
6367 | case NFS4_OPEN_STID: |
6368 | case NFS4_LOCK_STID: | |
ebe9cb3b | 6369 | status = nfsd4_check_openowner_confirmed(openlockstateid(s)); |
1af71cc8 | 6370 | break; |
23340032 BF |
6371 | default: |
6372 | printk("unknown stateid type %x\n", s->sc_type); | |
df561f66 | 6373 | fallthrough; |
23340032 | 6374 | case NFS4_CLOSED_STID: |
b0fc29d6 | 6375 | case NFS4_CLOSED_DELEG_STID: |
1af71cc8 | 6376 | status = nfserr_bad_stateid; |
23340032 | 6377 | } |
1af71cc8 JL |
6378 | out_unlock: |
6379 | spin_unlock(&cl->cl_lock); | |
6380 | return status; | |
17456804 BS |
6381 | } |
6382 | ||
cd61c522 | 6383 | __be32 |
2dd6e458 TM |
6384 | nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate, |
6385 | stateid_t *stateid, unsigned char typemask, | |
6386 | struct nfs4_stid **s, struct nfsd_net *nn) | |
38c2f4b1 | 6387 | { |
0eb6f20a | 6388 | __be32 status; |
4d01416a | 6389 | struct nfs4_stid *stid; |
95da1b3a AE |
6390 | bool return_revoked = false; |
6391 | ||
6392 | /* | |
6393 | * only return revoked delegations if explicitly asked. | |
6394 | * otherwise we report revoked or bad_stateid status. | |
6395 | */ | |
6396 | if (typemask & NFS4_REVOKED_DELEG_STID) | |
6397 | return_revoked = true; | |
6398 | else if (typemask & NFS4_DELEG_STID) | |
6399 | typemask |= NFS4_REVOKED_DELEG_STID; | |
38c2f4b1 | 6400 | |
ae254dac AE |
6401 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid) || |
6402 | CLOSE_STATEID(stateid)) | |
38c2f4b1 | 6403 | return nfserr_bad_stateid; |
f71475ba | 6404 | status = set_client(&stateid->si_opaque.so_clid, cstate, nn); |
a8a7c677 | 6405 | if (status == nfserr_stale_clientid) { |
4b24ca7d | 6406 | if (cstate->session) |
a8a7c677 | 6407 | return nfserr_bad_stateid; |
38c2f4b1 | 6408 | return nfserr_stale_stateid; |
a8a7c677 | 6409 | } |
0eb6f20a BF |
6410 | if (status) |
6411 | return status; | |
4d01416a JL |
6412 | stid = find_stateid_by_type(cstate->clp, stateid, typemask); |
6413 | if (!stid) | |
38c2f4b1 | 6414 | return nfserr_bad_stateid; |
4d01416a JL |
6415 | if ((stid->sc_type == NFS4_REVOKED_DELEG_STID) && !return_revoked) { |
6416 | nfs4_put_stid(stid); | |
95da1b3a AE |
6417 | if (cstate->minorversion) |
6418 | return nfserr_deleg_revoked; | |
6419 | return nfserr_bad_stateid; | |
6420 | } | |
4d01416a | 6421 | *s = stid; |
38c2f4b1 | 6422 | return nfs_ok; |
38c2f4b1 BF |
6423 | } |
6424 | ||
eb82dd39 | 6425 | static struct nfsd_file * |
a0649b2d CH |
6426 | nfs4_find_file(struct nfs4_stid *s, int flags) |
6427 | { | |
af90f707 CH |
6428 | if (!s) |
6429 | return NULL; | |
6430 | ||
a0649b2d CH |
6431 | switch (s->sc_type) { |
6432 | case NFS4_DELEG_STID: | |
6433 | if (WARN_ON_ONCE(!s->sc_file->fi_deleg_file)) | |
6434 | return NULL; | |
eb82dd39 | 6435 | return nfsd_file_get(s->sc_file->fi_deleg_file); |
a0649b2d CH |
6436 | case NFS4_OPEN_STID: |
6437 | case NFS4_LOCK_STID: | |
6438 | if (flags & RD_STATE) | |
6439 | return find_readable_file(s->sc_file); | |
6440 | else | |
6441 | return find_writeable_file(s->sc_file); | |
a0649b2d CH |
6442 | } |
6443 | ||
6444 | return NULL; | |
6445 | } | |
6446 | ||
6447 | static __be32 | |
d8836f77 | 6448 | nfs4_check_olstateid(struct nfs4_ol_stateid *ols, int flags) |
a0649b2d CH |
6449 | { |
6450 | __be32 status; | |
6451 | ||
a0649b2d CH |
6452 | status = nfsd4_check_openowner_confirmed(ols); |
6453 | if (status) | |
6454 | return status; | |
6455 | return nfs4_check_openmode(ols, flags); | |
6456 | } | |
6457 | ||
af90f707 CH |
6458 | static __be32 |
6459 | nfs4_check_file(struct svc_rqst *rqstp, struct svc_fh *fhp, struct nfs4_stid *s, | |
5c4583b2 | 6460 | struct nfsd_file **nfp, int flags) |
af90f707 CH |
6461 | { |
6462 | int acc = (flags & RD_STATE) ? NFSD_MAY_READ : NFSD_MAY_WRITE; | |
eb82dd39 | 6463 | struct nfsd_file *nf; |
af90f707 CH |
6464 | __be32 status; |
6465 | ||
eb82dd39 JL |
6466 | nf = nfs4_find_file(s, flags); |
6467 | if (nf) { | |
af90f707 CH |
6468 | status = nfsd_permission(rqstp, fhp->fh_export, fhp->fh_dentry, |
6469 | acc | NFSD_MAY_OWNER_OVERRIDE); | |
5c4583b2 JL |
6470 | if (status) { |
6471 | nfsd_file_put(nf); | |
eb82dd39 | 6472 | goto out; |
5c4583b2 | 6473 | } |
af90f707 | 6474 | } else { |
eb82dd39 | 6475 | status = nfsd_file_acquire(rqstp, fhp, acc, &nf); |
af90f707 CH |
6476 | if (status) |
6477 | return status; | |
af90f707 | 6478 | } |
5c4583b2 | 6479 | *nfp = nf; |
eb82dd39 | 6480 | out: |
eb82dd39 | 6481 | return status; |
af90f707 | 6482 | } |
624322f1 OK |
6483 | static void |
6484 | _free_cpntf_state_locked(struct nfsd_net *nn, struct nfs4_cpntf_state *cps) | |
6485 | { | |
781fde1a CL |
6486 | WARN_ON_ONCE(cps->cp_stateid.cs_type != NFS4_COPYNOTIFY_STID); |
6487 | if (!refcount_dec_and_test(&cps->cp_stateid.cs_count)) | |
624322f1 OK |
6488 | return; |
6489 | list_del(&cps->cp_list); | |
6490 | idr_remove(&nn->s2s_cp_stateids, | |
781fde1a | 6491 | cps->cp_stateid.cs_stid.si_opaque.so_id); |
624322f1 OK |
6492 | kfree(cps); |
6493 | } | |
b7342204 OK |
6494 | /* |
6495 | * A READ from an inter server to server COPY will have a | |
6496 | * copy stateid. Look up the copy notify stateid from the | |
6497 | * idr structure and take a reference on it. | |
6498 | */ | |
ce0887ac OK |
6499 | __be32 manage_cpntf_state(struct nfsd_net *nn, stateid_t *st, |
6500 | struct nfs4_client *clp, | |
6501 | struct nfs4_cpntf_state **cps) | |
b7342204 OK |
6502 | { |
6503 | copy_stateid_t *cps_t; | |
6504 | struct nfs4_cpntf_state *state = NULL; | |
6505 | ||
6506 | if (st->si_opaque.so_clid.cl_id != nn->s2s_cp_cl_id) | |
6507 | return nfserr_bad_stateid; | |
6508 | spin_lock(&nn->s2s_cp_lock); | |
6509 | cps_t = idr_find(&nn->s2s_cp_stateids, st->si_opaque.so_id); | |
6510 | if (cps_t) { | |
6511 | state = container_of(cps_t, struct nfs4_cpntf_state, | |
6512 | cp_stateid); | |
781fde1a | 6513 | if (state->cp_stateid.cs_type != NFS4_COPYNOTIFY_STID) { |
5277a79e DC |
6514 | state = NULL; |
6515 | goto unlock; | |
6516 | } | |
ce0887ac | 6517 | if (!clp) |
781fde1a | 6518 | refcount_inc(&state->cp_stateid.cs_count); |
ce0887ac OK |
6519 | else |
6520 | _free_cpntf_state_locked(nn, state); | |
b7342204 | 6521 | } |
5277a79e | 6522 | unlock: |
b7342204 OK |
6523 | spin_unlock(&nn->s2s_cp_lock); |
6524 | if (!state) | |
6525 | return nfserr_bad_stateid; | |
ce0887ac OK |
6526 | if (!clp && state) |
6527 | *cps = state; | |
b7342204 OK |
6528 | return 0; |
6529 | } | |
6530 | ||
6531 | static __be32 find_cpntf_state(struct nfsd_net *nn, stateid_t *st, | |
6532 | struct nfs4_stid **stid) | |
6533 | { | |
6534 | __be32 status; | |
6535 | struct nfs4_cpntf_state *cps = NULL; | |
47fdb22d | 6536 | struct nfs4_client *found; |
b7342204 | 6537 | |
ce0887ac | 6538 | status = manage_cpntf_state(nn, st, NULL, &cps); |
b7342204 OK |
6539 | if (status) |
6540 | return status; | |
6541 | ||
20b7d86f | 6542 | cps->cpntf_time = ktime_get_boottime_seconds(); |
47fdb22d BF |
6543 | |
6544 | status = nfserr_expired; | |
6545 | found = lookup_clientid(&cps->cp_p_clid, true, nn); | |
6546 | if (!found) | |
b7342204 | 6547 | goto out; |
47fdb22d BF |
6548 | |
6549 | *stid = find_stateid_by_type(found, &cps->cp_p_stateid, | |
6550 | NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID); | |
6551 | if (*stid) | |
6552 | status = nfs_ok; | |
6553 | else | |
6554 | status = nfserr_bad_stateid; | |
6555 | ||
6556 | put_client_renew(found); | |
b7342204 OK |
6557 | out: |
6558 | nfs4_put_cpntf_state(nn, cps); | |
6559 | return status; | |
6560 | } | |
624322f1 OK |
6561 | |
6562 | void nfs4_put_cpntf_state(struct nfsd_net *nn, struct nfs4_cpntf_state *cps) | |
6563 | { | |
6564 | spin_lock(&nn->s2s_cp_lock); | |
6565 | _free_cpntf_state_locked(nn, cps); | |
6566 | spin_unlock(&nn->s2s_cp_lock); | |
6567 | } | |
af90f707 | 6568 | |
1da177e4 | 6569 | /* |
a0649b2d CH |
6570 | * Checks for stateid operations |
6571 | */ | |
b37ad28b | 6572 | __be32 |
af90f707 | 6573 | nfs4_preprocess_stateid_op(struct svc_rqst *rqstp, |
aa0d6aed | 6574 | struct nfsd4_compound_state *cstate, struct svc_fh *fhp, |
624322f1 OK |
6575 | stateid_t *stateid, int flags, struct nfsd_file **nfp, |
6576 | struct nfs4_stid **cstid) | |
1da177e4 | 6577 | { |
af90f707 | 6578 | struct net *net = SVC_NET(rqstp); |
3320fef1 | 6579 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
af90f707 | 6580 | struct nfs4_stid *s = NULL; |
b37ad28b | 6581 | __be32 status; |
1da177e4 | 6582 | |
5c4583b2 JL |
6583 | if (nfp) |
6584 | *nfp = NULL; | |
1da177e4 | 6585 | |
af90f707 | 6586 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { |
074b07d9 BF |
6587 | if (cstid) |
6588 | status = nfserr_bad_stateid; | |
6589 | else | |
6590 | status = check_special_stateids(net, fhp, stateid, | |
6591 | flags); | |
af90f707 CH |
6592 | goto done; |
6593 | } | |
1da177e4 | 6594 | |
2dd6e458 | 6595 | status = nfsd4_lookup_stateid(cstate, stateid, |
db24b3b4 | 6596 | NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, |
2dd6e458 | 6597 | &s, nn); |
b7342204 OK |
6598 | if (status == nfserr_bad_stateid) |
6599 | status = find_cpntf_state(nn, stateid, &s); | |
38c2f4b1 | 6600 | if (status) |
c2d1d6a8 | 6601 | return status; |
03da3169 | 6602 | status = nfsd4_stid_check_stateid_generation(stateid, s, |
a0649b2d | 6603 | nfsd4_has_session(cstate)); |
69064a27 BF |
6604 | if (status) |
6605 | goto out; | |
a0649b2d | 6606 | |
f7a4d872 BF |
6607 | switch (s->sc_type) { |
6608 | case NFS4_DELEG_STID: | |
a0649b2d | 6609 | status = nfs4_check_delegmode(delegstateid(s), flags); |
f7a4d872 BF |
6610 | break; |
6611 | case NFS4_OPEN_STID: | |
6612 | case NFS4_LOCK_STID: | |
d8836f77 | 6613 | status = nfs4_check_olstateid(openlockstateid(s), flags); |
f7a4d872 BF |
6614 | break; |
6615 | default: | |
14bcab1a | 6616 | status = nfserr_bad_stateid; |
a0649b2d CH |
6617 | break; |
6618 | } | |
8fcd461d JL |
6619 | if (status) |
6620 | goto out; | |
6621 | status = nfs4_check_fh(fhp, s); | |
a0649b2d | 6622 | |
af90f707 | 6623 | done: |
5c4583b2 JL |
6624 | if (status == nfs_ok && nfp) |
6625 | status = nfs4_check_file(rqstp, fhp, s, nfp, flags); | |
1da177e4 | 6626 | out: |
624322f1 OK |
6627 | if (s) { |
6628 | if (!status && cstid) | |
6629 | *cstid = s; | |
6630 | else | |
6631 | nfs4_put_stid(s); | |
6632 | } | |
1da177e4 LT |
6633 | return status; |
6634 | } | |
6635 | ||
17456804 BS |
6636 | /* |
6637 | * Test if the stateid is valid | |
6638 | */ | |
6639 | __be32 | |
6640 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
eb69853d | 6641 | union nfsd4_op_u *u) |
17456804 | 6642 | { |
eb69853d | 6643 | struct nfsd4_test_stateid *test_stateid = &u->test_stateid; |
03cfb420 | 6644 | struct nfsd4_test_stateid_id *stateid; |
ec59659b | 6645 | struct nfs4_client *cl = cstate->clp; |
03cfb420 | 6646 | |
03cfb420 | 6647 | list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) |
7df302f7 CL |
6648 | stateid->ts_id_status = |
6649 | nfsd4_validate_stateid(cl, &stateid->ts_id_stateid); | |
03cfb420 | 6650 | |
17456804 BS |
6651 | return nfs_ok; |
6652 | } | |
6653 | ||
42691398 CL |
6654 | static __be32 |
6655 | nfsd4_free_lock_stateid(stateid_t *stateid, struct nfs4_stid *s) | |
6656 | { | |
6657 | struct nfs4_ol_stateid *stp = openlockstateid(s); | |
6658 | __be32 ret; | |
6659 | ||
659aefb6 TM |
6660 | ret = nfsd4_lock_ol_stateid(stp); |
6661 | if (ret) | |
6662 | goto out_put_stid; | |
42691398 CL |
6663 | |
6664 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); | |
6665 | if (ret) | |
6666 | goto out; | |
6667 | ||
6668 | ret = nfserr_locks_held; | |
6669 | if (check_for_locks(stp->st_stid.sc_file, | |
6670 | lockowner(stp->st_stateowner))) | |
6671 | goto out; | |
6672 | ||
6673 | release_lock_stateid(stp); | |
6674 | ret = nfs_ok; | |
6675 | ||
6676 | out: | |
6677 | mutex_unlock(&stp->st_mutex); | |
659aefb6 | 6678 | out_put_stid: |
42691398 CL |
6679 | nfs4_put_stid(s); |
6680 | return ret; | |
6681 | } | |
6682 | ||
e1ca12df BS |
6683 | __be32 |
6684 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
eb69853d | 6685 | union nfsd4_op_u *u) |
e1ca12df | 6686 | { |
eb69853d | 6687 | struct nfsd4_free_stateid *free_stateid = &u->free_stateid; |
e1ca12df | 6688 | stateid_t *stateid = &free_stateid->fr_stateid; |
2da1cec7 | 6689 | struct nfs4_stid *s; |
3bd64a5b | 6690 | struct nfs4_delegation *dp; |
ec59659b | 6691 | struct nfs4_client *cl = cstate->clp; |
2da1cec7 | 6692 | __be32 ret = nfserr_bad_stateid; |
e1ca12df | 6693 | |
1af71cc8 JL |
6694 | spin_lock(&cl->cl_lock); |
6695 | s = find_stateid_locked(cl, stateid); | |
2da1cec7 | 6696 | if (!s) |
1af71cc8 | 6697 | goto out_unlock; |
03da3169 | 6698 | spin_lock(&s->sc_lock); |
2da1cec7 BF |
6699 | switch (s->sc_type) { |
6700 | case NFS4_DELEG_STID: | |
e1ca12df | 6701 | ret = nfserr_locks_held; |
1af71cc8 | 6702 | break; |
2da1cec7 | 6703 | case NFS4_OPEN_STID: |
2da1cec7 BF |
6704 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); |
6705 | if (ret) | |
1af71cc8 JL |
6706 | break; |
6707 | ret = nfserr_locks_held; | |
f7a4d872 | 6708 | break; |
1af71cc8 | 6709 | case NFS4_LOCK_STID: |
03da3169 | 6710 | spin_unlock(&s->sc_lock); |
a15dfcd5 | 6711 | refcount_inc(&s->sc_count); |
1af71cc8 | 6712 | spin_unlock(&cl->cl_lock); |
42691398 | 6713 | ret = nfsd4_free_lock_stateid(stateid, s); |
1af71cc8 | 6714 | goto out; |
3bd64a5b | 6715 | case NFS4_REVOKED_DELEG_STID: |
03da3169 | 6716 | spin_unlock(&s->sc_lock); |
3bd64a5b | 6717 | dp = delegstateid(s); |
2d4a532d JL |
6718 | list_del_init(&dp->dl_recall_lru); |
6719 | spin_unlock(&cl->cl_lock); | |
6011695d | 6720 | nfs4_put_stid(s); |
3bd64a5b | 6721 | ret = nfs_ok; |
1af71cc8 JL |
6722 | goto out; |
6723 | /* Default falls through and returns nfserr_bad_stateid */ | |
e1ca12df | 6724 | } |
03da3169 | 6725 | spin_unlock(&s->sc_lock); |
1af71cc8 JL |
6726 | out_unlock: |
6727 | spin_unlock(&cl->cl_lock); | |
e1ca12df | 6728 | out: |
e1ca12df BS |
6729 | return ret; |
6730 | } | |
6731 | ||
4c4cd222 N |
6732 | static inline int |
6733 | setlkflg (int type) | |
6734 | { | |
6735 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
6736 | RD_STATE : WR_STATE; | |
6737 | } | |
1da177e4 | 6738 | |
dcef0413 | 6739 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
c0a5d93e BF |
6740 | { |
6741 | struct svc_fh *current_fh = &cstate->current_fh; | |
6742 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
6743 | __be32 status; | |
6744 | ||
c0a5d93e BF |
6745 | status = nfsd4_check_seqid(cstate, sop, seqid); |
6746 | if (status) | |
6747 | return status; | |
9271d7e5 TM |
6748 | status = nfsd4_lock_ol_stateid(stp); |
6749 | if (status != nfs_ok) | |
6750 | return status; | |
f7a4d872 | 6751 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); |
35a92fe8 JL |
6752 | if (status == nfs_ok) |
6753 | status = nfs4_check_fh(current_fh, &stp->st_stid); | |
6754 | if (status != nfs_ok) | |
feb9dad5 | 6755 | mutex_unlock(&stp->st_mutex); |
35a92fe8 | 6756 | return status; |
c0a5d93e BF |
6757 | } |
6758 | ||
1da177e4 LT |
6759 | /* |
6760 | * Checks for sequence id mutating operations. | |
6761 | */ | |
b37ad28b | 6762 | static __be32 |
dd453dfd | 6763 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2288d0e3 | 6764 | stateid_t *stateid, char typemask, |
3320fef1 SK |
6765 | struct nfs4_ol_stateid **stpp, |
6766 | struct nfsd_net *nn) | |
1da177e4 | 6767 | { |
0836f587 | 6768 | __be32 status; |
38c2f4b1 | 6769 | struct nfs4_stid *s; |
e17f99b7 | 6770 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 6771 | |
dd5e3fbc | 6772 | trace_nfsd_preprocess(seqid, stateid); |
3a4f98bb | 6773 | |
1da177e4 | 6774 | *stpp = NULL; |
2dd6e458 | 6775 | status = nfsd4_lookup_stateid(cstate, stateid, typemask, &s, nn); |
c0a5d93e BF |
6776 | if (status) |
6777 | return status; | |
e17f99b7 | 6778 | stp = openlockstateid(s); |
58fb12e6 | 6779 | nfsd4_cstate_assign_replay(cstate, stp->st_stateowner); |
1da177e4 | 6780 | |
e17f99b7 | 6781 | status = nfs4_seqid_op_checks(cstate, stateid, seqid, stp); |
fd911011 | 6782 | if (!status) |
e17f99b7 | 6783 | *stpp = stp; |
fd911011 TM |
6784 | else |
6785 | nfs4_put_stid(&stp->st_stid); | |
e17f99b7 | 6786 | return status; |
c0a5d93e | 6787 | } |
39325bd0 | 6788 | |
3320fef1 SK |
6789 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
6790 | stateid_t *stateid, struct nfs4_ol_stateid **stpp, struct nfsd_net *nn) | |
c0a5d93e BF |
6791 | { |
6792 | __be32 status; | |
6793 | struct nfs4_openowner *oo; | |
4cbfc9f7 | 6794 | struct nfs4_ol_stateid *stp; |
1da177e4 | 6795 | |
c0a5d93e | 6796 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
4cbfc9f7 | 6797 | NFS4_OPEN_STID, &stp, nn); |
7a8711c9 BF |
6798 | if (status) |
6799 | return status; | |
4cbfc9f7 TM |
6800 | oo = openowner(stp->st_stateowner); |
6801 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { | |
feb9dad5 | 6802 | mutex_unlock(&stp->st_mutex); |
4cbfc9f7 | 6803 | nfs4_put_stid(&stp->st_stid); |
3a4f98bb | 6804 | return nfserr_bad_stateid; |
4cbfc9f7 TM |
6805 | } |
6806 | *stpp = stp; | |
3a4f98bb | 6807 | return nfs_ok; |
1da177e4 LT |
6808 | } |
6809 | ||
b37ad28b | 6810 | __be32 |
ca364317 | 6811 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 6812 | union nfsd4_op_u *u) |
1da177e4 | 6813 | { |
eb69853d | 6814 | struct nfsd4_open_confirm *oc = &u->open_confirm; |
b37ad28b | 6815 | __be32 status; |
fe0750e5 | 6816 | struct nfs4_openowner *oo; |
dcef0413 | 6817 | struct nfs4_ol_stateid *stp; |
3320fef1 | 6818 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 6819 | |
a6a9f18f AV |
6820 | dprintk("NFSD: nfsd4_open_confirm on file %pd\n", |
6821 | cstate->current_fh.fh_dentry); | |
1da177e4 | 6822 | |
ca364317 | 6823 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
6824 | if (status) |
6825 | return status; | |
1da177e4 | 6826 | |
9072d5c6 | 6827 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 6828 | oc->oc_seqid, &oc->oc_req_stateid, |
3320fef1 | 6829 | NFS4_OPEN_STID, &stp, nn); |
9072d5c6 | 6830 | if (status) |
68b66e82 | 6831 | goto out; |
fe0750e5 | 6832 | oo = openowner(stp->st_stateowner); |
68b66e82 | 6833 | status = nfserr_bad_stateid; |
35a92fe8 | 6834 | if (oo->oo_flags & NFS4_OO_CONFIRMED) { |
feb9dad5 | 6835 | mutex_unlock(&stp->st_mutex); |
2585fc79 | 6836 | goto put_stateid; |
35a92fe8 | 6837 | } |
dad1c067 | 6838 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
9767feb2 | 6839 | nfs4_inc_and_copy_stateid(&oc->oc_resp_stateid, &stp->st_stid); |
feb9dad5 | 6840 | mutex_unlock(&stp->st_mutex); |
dd5e3fbc | 6841 | trace_nfsd_open_confirm(oc->oc_seqid, &stp->st_stid.sc_stateid); |
2a4317c5 | 6842 | nfsd4_client_record_create(oo->oo_owner.so_client); |
68b66e82 | 6843 | status = nfs_ok; |
2585fc79 TM |
6844 | put_stateid: |
6845 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 6846 | out: |
9411b1d4 | 6847 | nfsd4_bump_seqid(cstate, status); |
1da177e4 LT |
6848 | return status; |
6849 | } | |
6850 | ||
6409a5a6 | 6851 | static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) |
1da177e4 | 6852 | { |
82c5ff1b | 6853 | if (!test_access(access, stp)) |
6409a5a6 | 6854 | return; |
11b9164a | 6855 | nfs4_file_put_access(stp->st_stid.sc_file, access); |
82c5ff1b | 6856 | clear_access(access, stp); |
6409a5a6 | 6857 | } |
f197c271 | 6858 | |
6409a5a6 BF |
6859 | static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) |
6860 | { | |
6861 | switch (to_access) { | |
6862 | case NFS4_SHARE_ACCESS_READ: | |
6863 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); | |
6864 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
6865 | break; | |
6866 | case NFS4_SHARE_ACCESS_WRITE: | |
6867 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); | |
6868 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
6869 | break; | |
6870 | case NFS4_SHARE_ACCESS_BOTH: | |
6871 | break; | |
6872 | default: | |
063b0fb9 | 6873 | WARN_ON_ONCE(1); |
1da177e4 LT |
6874 | } |
6875 | } | |
6876 | ||
b37ad28b | 6877 | __be32 |
ca364317 | 6878 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
eb69853d | 6879 | struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) |
1da177e4 | 6880 | { |
eb69853d | 6881 | struct nfsd4_open_downgrade *od = &u->open_downgrade; |
b37ad28b | 6882 | __be32 status; |
dcef0413 | 6883 | struct nfs4_ol_stateid *stp; |
3320fef1 | 6884 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 6885 | |
a6a9f18f AV |
6886 | dprintk("NFSD: nfsd4_open_downgrade on file %pd\n", |
6887 | cstate->current_fh.fh_dentry); | |
1da177e4 | 6888 | |
c30e92df | 6889 | /* We don't yet support WANT bits: */ |
2c8bd7e0 BH |
6890 | if (od->od_deleg_want) |
6891 | dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, | |
6892 | od->od_deleg_want); | |
1da177e4 | 6893 | |
c0a5d93e | 6894 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
3320fef1 | 6895 | &od->od_stateid, &stp, nn); |
9072d5c6 | 6896 | if (status) |
1da177e4 | 6897 | goto out; |
1da177e4 | 6898 | status = nfserr_inval; |
82c5ff1b | 6899 | if (!test_access(od->od_share_access, stp)) { |
c11c591f | 6900 | dprintk("NFSD: access not a subset of current bitmap: 0x%hhx, input access=%08x\n", |
1da177e4 | 6901 | stp->st_access_bmap, od->od_share_access); |
0667b1e9 | 6902 | goto put_stateid; |
1da177e4 | 6903 | } |
ce0fc43c | 6904 | if (!test_deny(od->od_share_deny, stp)) { |
c11c591f | 6905 | dprintk("NFSD: deny not a subset of current bitmap: 0x%hhx, input deny=%08x\n", |
1da177e4 | 6906 | stp->st_deny_bmap, od->od_share_deny); |
0667b1e9 | 6907 | goto put_stateid; |
1da177e4 | 6908 | } |
6409a5a6 | 6909 | nfs4_stateid_downgrade(stp, od->od_share_access); |
ce0fc43c | 6910 | reset_union_bmap_deny(od->od_share_deny, stp); |
9767feb2 | 6911 | nfs4_inc_and_copy_stateid(&od->od_stateid, &stp->st_stid); |
1da177e4 | 6912 | status = nfs_ok; |
0667b1e9 | 6913 | put_stateid: |
feb9dad5 | 6914 | mutex_unlock(&stp->st_mutex); |
0667b1e9 | 6915 | nfs4_put_stid(&stp->st_stid); |
1da177e4 | 6916 | out: |
9411b1d4 | 6917 | nfsd4_bump_seqid(cstate, status); |
1da177e4 LT |
6918 | return status; |
6919 | } | |
6920 | ||
f7a4d872 BF |
6921 | static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) |
6922 | { | |
acf9295b | 6923 | struct nfs4_client *clp = s->st_stid.sc_client; |
e8568739 | 6924 | bool unhashed; |
d83017f9 | 6925 | LIST_HEAD(reaplist); |
019805fe | 6926 | struct nfs4_ol_stateid *stp; |
acf9295b | 6927 | |
2c41beb0 | 6928 | spin_lock(&clp->cl_lock); |
e8568739 | 6929 | unhashed = unhash_open_stateid(s, &reaplist); |
acf9295b | 6930 | |
d83017f9 | 6931 | if (clp->cl_minorversion) { |
e8568739 JL |
6932 | if (unhashed) |
6933 | put_ol_stateid_locked(s, &reaplist); | |
d83017f9 | 6934 | spin_unlock(&clp->cl_lock); |
019805fe DN |
6935 | list_for_each_entry(stp, &reaplist, st_locks) |
6936 | nfs4_free_cpntf_statelist(clp->net, &stp->st_stid); | |
d83017f9 JL |
6937 | free_ol_stateid_reaplist(&reaplist); |
6938 | } else { | |
6939 | spin_unlock(&clp->cl_lock); | |
6940 | free_ol_stateid_reaplist(&reaplist); | |
e8568739 JL |
6941 | if (unhashed) |
6942 | move_to_close_lru(s, clp->net); | |
d83017f9 | 6943 | } |
38c387b5 BF |
6944 | } |
6945 | ||
1da177e4 LT |
6946 | /* |
6947 | * nfs4_unlock_state() called after encode | |
6948 | */ | |
b37ad28b | 6949 | __be32 |
ca364317 | 6950 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 6951 | union nfsd4_op_u *u) |
1da177e4 | 6952 | { |
eb69853d | 6953 | struct nfsd4_close *close = &u->close; |
b37ad28b | 6954 | __be32 status; |
dcef0413 | 6955 | struct nfs4_ol_stateid *stp; |
3320fef1 SK |
6956 | struct net *net = SVC_NET(rqstp); |
6957 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 | 6958 | |
a6a9f18f AV |
6959 | dprintk("NFSD: nfsd4_close on file %pd\n", |
6960 | cstate->current_fh.fh_dentry); | |
1da177e4 | 6961 | |
f7a4d872 BF |
6962 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
6963 | &close->cl_stateid, | |
6964 | NFS4_OPEN_STID|NFS4_CLOSED_STID, | |
3320fef1 | 6965 | &stp, nn); |
9411b1d4 | 6966 | nfsd4_bump_seqid(cstate, status); |
9072d5c6 | 6967 | if (status) |
1da177e4 | 6968 | goto out; |
15ca08d3 TM |
6969 | |
6970 | stp->st_stid.sc_type = NFS4_CLOSED_STID; | |
bd2decac JL |
6971 | |
6972 | /* | |
6973 | * Technically we don't _really_ have to increment or copy it, since | |
6974 | * it should just be gone after this operation and we clobber the | |
6975 | * copied value below, but we continue to do so here just to ensure | |
6976 | * that racing ops see that there was a state change. | |
6977 | */ | |
9767feb2 | 6978 | nfs4_inc_and_copy_stateid(&close->cl_stateid, &stp->st_stid); |
1da177e4 | 6979 | |
f7a4d872 | 6980 | nfsd4_close_open_stateid(stp); |
15ca08d3 | 6981 | mutex_unlock(&stp->st_mutex); |
8a0b589d | 6982 | |
bd2decac JL |
6983 | /* v4.1+ suggests that we send a special stateid in here, since the |
6984 | * clients should just ignore this anyway. Since this is not useful | |
6985 | * for v4.0 clients either, we set it to the special close_stateid | |
6986 | * universally. | |
6987 | * | |
6988 | * See RFC5661 section 18.2.4, and RFC7530 section 16.2.5 | |
6989 | */ | |
6990 | memcpy(&close->cl_stateid, &close_stateid, sizeof(close->cl_stateid)); | |
fb500a7c | 6991 | |
8a0b589d TM |
6992 | /* put reference from nfs4_preprocess_seqid_op */ |
6993 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 6994 | out: |
1da177e4 LT |
6995 | return status; |
6996 | } | |
6997 | ||
b37ad28b | 6998 | __be32 |
ca364317 | 6999 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 7000 | union nfsd4_op_u *u) |
1da177e4 | 7001 | { |
eb69853d | 7002 | struct nfsd4_delegreturn *dr = &u->delegreturn; |
203a8c8e BF |
7003 | struct nfs4_delegation *dp; |
7004 | stateid_t *stateid = &dr->dr_stateid; | |
38c2f4b1 | 7005 | struct nfs4_stid *s; |
b37ad28b | 7006 | __be32 status; |
3320fef1 | 7007 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 7008 | |
ca364317 | 7009 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e | 7010 | return status; |
1da177e4 | 7011 | |
2dd6e458 | 7012 | status = nfsd4_lookup_stateid(cstate, stateid, NFS4_DELEG_STID, &s, nn); |
38c2f4b1 | 7013 | if (status) |
203a8c8e | 7014 | goto out; |
38c2f4b1 | 7015 | dp = delegstateid(s); |
03da3169 | 7016 | status = nfsd4_stid_check_stateid_generation(stateid, &dp->dl_stid, nfsd4_has_session(cstate)); |
203a8c8e | 7017 | if (status) |
fd911011 | 7018 | goto put_stateid; |
203a8c8e | 7019 | |
20eee313 | 7020 | trace_nfsd_deleg_return(stateid); |
c035362e | 7021 | wake_up_var(d_inode(cstate->current_fh.fh_dentry)); |
3bd64a5b | 7022 | destroy_delegation(dp); |
fd911011 TM |
7023 | put_stateid: |
7024 | nfs4_put_stid(&dp->dl_stid); | |
1da177e4 LT |
7025 | out: |
7026 | return status; | |
7027 | } | |
7028 | ||
87df4de8 BH |
7029 | /* last octet in a range */ |
7030 | static inline u64 | |
7031 | last_byte_offset(u64 start, u64 len) | |
7032 | { | |
7033 | u64 end; | |
7034 | ||
063b0fb9 | 7035 | WARN_ON_ONCE(!len); |
87df4de8 BH |
7036 | end = start + len; |
7037 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
7038 | } | |
7039 | ||
1da177e4 LT |
7040 | /* |
7041 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
7042 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
7043 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
7044 | * locking, this prevents us from being completely protocol-compliant. The | |
7045 | * real solution to this problem is to start using unsigned file offsets in | |
7046 | * the VFS, but this is a very deep change! | |
7047 | */ | |
7048 | static inline void | |
7049 | nfs4_transform_lock_offset(struct file_lock *lock) | |
7050 | { | |
7051 | if (lock->fl_start < 0) | |
7052 | lock->fl_start = OFFSET_MAX; | |
7053 | if (lock->fl_end < 0) | |
7054 | lock->fl_end = OFFSET_MAX; | |
7055 | } | |
7056 | ||
cae80b30 | 7057 | static fl_owner_t |
35aff067 | 7058 | nfsd4_lm_get_owner(fl_owner_t owner) |
aef9583b | 7059 | { |
cae80b30 JL |
7060 | struct nfs4_lockowner *lo = (struct nfs4_lockowner *)owner; |
7061 | ||
7062 | nfs4_get_stateowner(&lo->lo_owner); | |
7063 | return owner; | |
aef9583b KM |
7064 | } |
7065 | ||
cae80b30 | 7066 | static void |
35aff067 | 7067 | nfsd4_lm_put_owner(fl_owner_t owner) |
aef9583b | 7068 | { |
cae80b30 | 7069 | struct nfs4_lockowner *lo = (struct nfs4_lockowner *)owner; |
aef9583b | 7070 | |
cae80b30 | 7071 | if (lo) |
aef9583b | 7072 | nfs4_put_stateowner(&lo->lo_owner); |
aef9583b KM |
7073 | } |
7074 | ||
27431aff DN |
7075 | /* return pointer to struct nfs4_client if client is expirable */ |
7076 | static bool | |
7077 | nfsd4_lm_lock_expirable(struct file_lock *cfl) | |
7078 | { | |
7079 | struct nfs4_lockowner *lo = (struct nfs4_lockowner *)cfl->fl_owner; | |
7080 | struct nfs4_client *clp = lo->lo_owner.so_client; | |
7081 | struct nfsd_net *nn; | |
7082 | ||
7083 | if (try_to_expire_client(clp)) { | |
7084 | nn = net_generic(clp->net, nfsd_net_id); | |
7085 | mod_delayed_work(laundry_wq, &nn->laundromat_work, 0); | |
7086 | return true; | |
7087 | } | |
7088 | return false; | |
7089 | } | |
7090 | ||
7091 | /* schedule laundromat to run immediately and wait for it to complete */ | |
7092 | static void | |
7093 | nfsd4_lm_expire_lock(void) | |
7094 | { | |
7095 | flush_workqueue(laundry_wq); | |
7096 | } | |
7097 | ||
76d348fa JL |
7098 | static void |
7099 | nfsd4_lm_notify(struct file_lock *fl) | |
7100 | { | |
7101 | struct nfs4_lockowner *lo = (struct nfs4_lockowner *)fl->fl_owner; | |
7102 | struct net *net = lo->lo_owner.so_client->net; | |
7103 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
7104 | struct nfsd4_blocked_lock *nbl = container_of(fl, | |
7105 | struct nfsd4_blocked_lock, nbl_lock); | |
7106 | bool queue = false; | |
7107 | ||
7919d0a2 | 7108 | /* An empty list means that something else is going to be using it */ |
0cc11a61 | 7109 | spin_lock(&nn->blocked_locks_lock); |
76d348fa JL |
7110 | if (!list_empty(&nbl->nbl_list)) { |
7111 | list_del_init(&nbl->nbl_list); | |
7919d0a2 | 7112 | list_del_init(&nbl->nbl_lru); |
76d348fa JL |
7113 | queue = true; |
7114 | } | |
0cc11a61 | 7115 | spin_unlock(&nn->blocked_locks_lock); |
76d348fa | 7116 | |
2cde7f81 CL |
7117 | if (queue) { |
7118 | trace_nfsd_cb_notify_lock(lo, nbl); | |
76d348fa | 7119 | nfsd4_run_cb(&nbl->nbl_cb); |
2cde7f81 | 7120 | } |
76d348fa JL |
7121 | } |
7122 | ||
7b021967 | 7123 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
27431aff | 7124 | .lm_mod_owner = THIS_MODULE, |
76d348fa | 7125 | .lm_notify = nfsd4_lm_notify, |
35aff067 CL |
7126 | .lm_get_owner = nfsd4_lm_get_owner, |
7127 | .lm_put_owner = nfsd4_lm_put_owner, | |
27431aff DN |
7128 | .lm_lock_expirable = nfsd4_lm_lock_expirable, |
7129 | .lm_expire_lock = nfsd4_lm_expire_lock, | |
d5b9026a | 7130 | }; |
1da177e4 LT |
7131 | |
7132 | static inline void | |
7133 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
7134 | { | |
fe0750e5 | 7135 | struct nfs4_lockowner *lo; |
1da177e4 | 7136 | |
d5b9026a | 7137 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 | 7138 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
6f4859b8 BF |
7139 | xdr_netobj_dup(&deny->ld_owner, &lo->lo_owner.so_owner, |
7140 | GFP_KERNEL); | |
7c13f344 BF |
7141 | if (!deny->ld_owner.data) |
7142 | /* We just don't care that much */ | |
7143 | goto nevermind; | |
fe0750e5 | 7144 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; |
d5b9026a | 7145 | } else { |
7c13f344 BF |
7146 | nevermind: |
7147 | deny->ld_owner.len = 0; | |
7148 | deny->ld_owner.data = NULL; | |
d5b9026a N |
7149 | deny->ld_clientid.cl_boot = 0; |
7150 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
7151 | } |
7152 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
7153 | deny->ld_length = NFS4_MAX_UINT64; |
7154 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
7155 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
7156 | deny->ld_type = NFS4_READ_LT; | |
7157 | if (fl->fl_type != F_RDLCK) | |
7158 | deny->ld_type = NFS4_WRITE_LT; | |
7159 | } | |
7160 | ||
fe0750e5 | 7161 | static struct nfs4_lockowner * |
c8623999 | 7162 | find_lockowner_str_locked(struct nfs4_client *clp, struct xdr_netobj *owner) |
1da177e4 | 7163 | { |
d4f0489f | 7164 | unsigned int strhashval = ownerstr_hashval(owner); |
b3c32bcd | 7165 | struct nfs4_stateowner *so; |
1da177e4 | 7166 | |
0a880a28 TM |
7167 | lockdep_assert_held(&clp->cl_lock); |
7168 | ||
d4f0489f TM |
7169 | list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[strhashval], |
7170 | so_strhash) { | |
b3c32bcd TM |
7171 | if (so->so_is_open_owner) |
7172 | continue; | |
b5971afa KM |
7173 | if (same_owner_str(so, owner)) |
7174 | return lockowner(nfs4_get_stateowner(so)); | |
1da177e4 LT |
7175 | } |
7176 | return NULL; | |
7177 | } | |
7178 | ||
c58c6610 | 7179 | static struct nfs4_lockowner * |
c8623999 | 7180 | find_lockowner_str(struct nfs4_client *clp, struct xdr_netobj *owner) |
c58c6610 TM |
7181 | { |
7182 | struct nfs4_lockowner *lo; | |
7183 | ||
d4f0489f | 7184 | spin_lock(&clp->cl_lock); |
c8623999 | 7185 | lo = find_lockowner_str_locked(clp, owner); |
d4f0489f | 7186 | spin_unlock(&clp->cl_lock); |
c58c6610 TM |
7187 | return lo; |
7188 | } | |
7189 | ||
8f4b54c5 JL |
7190 | static void nfs4_unhash_lockowner(struct nfs4_stateowner *sop) |
7191 | { | |
c58c6610 | 7192 | unhash_lockowner_locked(lockowner(sop)); |
8f4b54c5 JL |
7193 | } |
7194 | ||
6b180f0b JL |
7195 | static void nfs4_free_lockowner(struct nfs4_stateowner *sop) |
7196 | { | |
7197 | struct nfs4_lockowner *lo = lockowner(sop); | |
7198 | ||
7199 | kmem_cache_free(lockowner_slab, lo); | |
7200 | } | |
7201 | ||
7202 | static const struct nfs4_stateowner_operations lockowner_ops = { | |
8f4b54c5 JL |
7203 | .so_unhash = nfs4_unhash_lockowner, |
7204 | .so_free = nfs4_free_lockowner, | |
6b180f0b JL |
7205 | }; |
7206 | ||
1da177e4 LT |
7207 | /* |
7208 | * Alloc a lock owner structure. | |
7209 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 7210 | * occurred. |
1da177e4 | 7211 | * |
16bfdaaf | 7212 | * strhashval = ownerstr_hashval |
1da177e4 | 7213 | */ |
fe0750e5 | 7214 | static struct nfs4_lockowner * |
c58c6610 TM |
7215 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, |
7216 | struct nfs4_ol_stateid *open_stp, | |
7217 | struct nfsd4_lock *lock) | |
7218 | { | |
c58c6610 | 7219 | struct nfs4_lockowner *lo, *ret; |
1da177e4 | 7220 | |
fe0750e5 BF |
7221 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
7222 | if (!lo) | |
1da177e4 | 7223 | return NULL; |
76d348fa | 7224 | INIT_LIST_HEAD(&lo->lo_blocked); |
fe0750e5 BF |
7225 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
7226 | lo->lo_owner.so_is_open_owner = 0; | |
5db1c03f | 7227 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid; |
6b180f0b | 7228 | lo->lo_owner.so_ops = &lockowner_ops; |
d4f0489f | 7229 | spin_lock(&clp->cl_lock); |
c8623999 | 7230 | ret = find_lockowner_str_locked(clp, &lock->lk_new_owner); |
c58c6610 TM |
7231 | if (ret == NULL) { |
7232 | list_add(&lo->lo_owner.so_strhash, | |
d4f0489f | 7233 | &clp->cl_ownerstr_hashtbl[strhashval]); |
c58c6610 TM |
7234 | ret = lo; |
7235 | } else | |
d50ffded KM |
7236 | nfs4_free_stateowner(&lo->lo_owner); |
7237 | ||
d4f0489f | 7238 | spin_unlock(&clp->cl_lock); |
340f0ba1 | 7239 | return ret; |
1da177e4 LT |
7240 | } |
7241 | ||
fd1fd685 | 7242 | static struct nfs4_ol_stateid * |
a451b123 TM |
7243 | find_lock_stateid(const struct nfs4_lockowner *lo, |
7244 | const struct nfs4_ol_stateid *ost) | |
fd1fd685 TM |
7245 | { |
7246 | struct nfs4_ol_stateid *lst; | |
fd1fd685 | 7247 | |
a451b123 | 7248 | lockdep_assert_held(&ost->st_stid.sc_client->cl_lock); |
fd1fd685 | 7249 | |
a451b123 TM |
7250 | /* If ost is not hashed, ost->st_locks will not be valid */ |
7251 | if (!nfs4_ol_stateid_unhashed(ost)) | |
7252 | list_for_each_entry(lst, &ost->st_locks, st_locks) { | |
7253 | if (lst->st_stateowner == &lo->lo_owner) { | |
7254 | refcount_inc(&lst->st_stid.sc_count); | |
7255 | return lst; | |
7256 | } | |
fd1fd685 | 7257 | } |
fd1fd685 TM |
7258 | return NULL; |
7259 | } | |
7260 | ||
beeca19c | 7261 | static struct nfs4_ol_stateid * |
356a95ec JL |
7262 | init_lock_stateid(struct nfs4_ol_stateid *stp, struct nfs4_lockowner *lo, |
7263 | struct nfs4_file *fp, struct inode *inode, | |
7264 | struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 7265 | { |
d3b313a4 | 7266 | struct nfs4_client *clp = lo->lo_owner.so_client; |
beeca19c | 7267 | struct nfs4_ol_stateid *retstp; |
1da177e4 | 7268 | |
beeca19c | 7269 | mutex_init(&stp->st_mutex); |
4f34bd05 | 7270 | mutex_lock_nested(&stp->st_mutex, OPEN_STATEID_MUTEX); |
beeca19c TM |
7271 | retry: |
7272 | spin_lock(&clp->cl_lock); | |
a451b123 TM |
7273 | if (nfs4_ol_stateid_unhashed(open_stp)) |
7274 | goto out_close; | |
7275 | retstp = find_lock_stateid(lo, open_stp); | |
beeca19c | 7276 | if (retstp) |
a451b123 | 7277 | goto out_found; |
a15dfcd5 | 7278 | refcount_inc(&stp->st_stid.sc_count); |
3abdb607 | 7279 | stp->st_stid.sc_type = NFS4_LOCK_STID; |
b5971afa | 7280 | stp->st_stateowner = nfs4_get_stateowner(&lo->lo_owner); |
13cd2184 | 7281 | get_nfs4_file(fp); |
11b9164a | 7282 | stp->st_stid.sc_file = fp; |
0997b173 | 7283 | stp->st_access_bmap = 0; |
1da177e4 | 7284 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 7285 | stp->st_openstp = open_stp; |
a451b123 | 7286 | spin_lock(&fp->fi_lock); |
3c87b9b7 | 7287 | list_add(&stp->st_locks, &open_stp->st_locks); |
1c755dc1 | 7288 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
1d31a253 TM |
7289 | list_add(&stp->st_perfile, &fp->fi_stateids); |
7290 | spin_unlock(&fp->fi_lock); | |
beeca19c | 7291 | spin_unlock(&clp->cl_lock); |
beeca19c | 7292 | return stp; |
a451b123 TM |
7293 | out_found: |
7294 | spin_unlock(&clp->cl_lock); | |
7295 | if (nfsd4_lock_ol_stateid(retstp) != nfs_ok) { | |
7296 | nfs4_put_stid(&retstp->st_stid); | |
7297 | goto retry; | |
7298 | } | |
7299 | /* To keep mutex tracking happy */ | |
7300 | mutex_unlock(&stp->st_mutex); | |
7301 | return retstp; | |
7302 | out_close: | |
7303 | spin_unlock(&clp->cl_lock); | |
7304 | mutex_unlock(&stp->st_mutex); | |
7305 | return NULL; | |
1da177e4 LT |
7306 | } |
7307 | ||
356a95ec JL |
7308 | static struct nfs4_ol_stateid * |
7309 | find_or_create_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fi, | |
7310 | struct inode *inode, struct nfs4_ol_stateid *ost, | |
7311 | bool *new) | |
7312 | { | |
7313 | struct nfs4_stid *ns = NULL; | |
7314 | struct nfs4_ol_stateid *lst; | |
7315 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); | |
7316 | struct nfs4_client *clp = oo->oo_owner.so_client; | |
7317 | ||
beeca19c | 7318 | *new = false; |
356a95ec | 7319 | spin_lock(&clp->cl_lock); |
a451b123 | 7320 | lst = find_lock_stateid(lo, ost); |
356a95ec | 7321 | spin_unlock(&clp->cl_lock); |
beeca19c TM |
7322 | if (lst != NULL) { |
7323 | if (nfsd4_lock_ol_stateid(lst) == nfs_ok) | |
7324 | goto out; | |
7325 | nfs4_put_stid(&lst->st_stid); | |
7326 | } | |
7327 | ns = nfs4_alloc_stid(clp, stateid_slab, nfs4_free_lock_stateid); | |
7328 | if (ns == NULL) | |
7329 | return NULL; | |
7330 | ||
7331 | lst = init_lock_stateid(openlockstateid(ns), lo, fi, inode, ost); | |
7332 | if (lst == openlockstateid(ns)) | |
7333 | *new = true; | |
7334 | else | |
356a95ec | 7335 | nfs4_put_stid(ns); |
beeca19c | 7336 | out: |
356a95ec JL |
7337 | return lst; |
7338 | } | |
c53530da | 7339 | |
fd39ca9a | 7340 | static int |
1da177e4 LT |
7341 | check_lock_length(u64 offset, u64 length) |
7342 | { | |
e7969315 KM |
7343 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
7344 | (length > ~offset))); | |
1da177e4 LT |
7345 | } |
7346 | ||
dcef0413 | 7347 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 | 7348 | { |
11b9164a | 7349 | struct nfs4_file *fp = lock_stp->st_stid.sc_file; |
0997b173 | 7350 | |
7214e860 JL |
7351 | lockdep_assert_held(&fp->fi_lock); |
7352 | ||
82c5ff1b | 7353 | if (test_access(access, lock_stp)) |
0997b173 | 7354 | return; |
12659651 | 7355 | __nfs4_file_get_access(fp, access); |
82c5ff1b | 7356 | set_access(access, lock_stp); |
0997b173 BF |
7357 | } |
7358 | ||
356a95ec JL |
7359 | static __be32 |
7360 | lookup_or_create_lock_state(struct nfsd4_compound_state *cstate, | |
7361 | struct nfs4_ol_stateid *ost, | |
7362 | struct nfsd4_lock *lock, | |
dd257933 | 7363 | struct nfs4_ol_stateid **plst, bool *new) |
64a284d0 | 7364 | { |
5db1c03f | 7365 | __be32 status; |
11b9164a | 7366 | struct nfs4_file *fi = ost->st_stid.sc_file; |
64a284d0 BF |
7367 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); |
7368 | struct nfs4_client *cl = oo->oo_owner.so_client; | |
2b0143b5 | 7369 | struct inode *inode = d_inode(cstate->current_fh.fh_dentry); |
64a284d0 | 7370 | struct nfs4_lockowner *lo; |
dd257933 | 7371 | struct nfs4_ol_stateid *lst; |
64a284d0 BF |
7372 | unsigned int strhashval; |
7373 | ||
c8623999 | 7374 | lo = find_lockowner_str(cl, &lock->lk_new_owner); |
c53530da | 7375 | if (!lo) { |
76f6c9e1 | 7376 | strhashval = ownerstr_hashval(&lock->lk_new_owner); |
c53530da JL |
7377 | lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); |
7378 | if (lo == NULL) | |
7379 | return nfserr_jukebox; | |
7380 | } else { | |
7381 | /* with an existing lockowner, seqids must be the same */ | |
5db1c03f | 7382 | status = nfserr_bad_seqid; |
c53530da JL |
7383 | if (!cstate->minorversion && |
7384 | lock->lk_new_lock_seqid != lo->lo_owner.so_seqid) | |
5db1c03f | 7385 | goto out; |
64a284d0 | 7386 | } |
c53530da | 7387 | |
dd257933 JL |
7388 | lst = find_or_create_lock_stateid(lo, fi, inode, ost, new); |
7389 | if (lst == NULL) { | |
5db1c03f JL |
7390 | status = nfserr_jukebox; |
7391 | goto out; | |
64a284d0 | 7392 | } |
dd257933 | 7393 | |
5db1c03f | 7394 | status = nfs_ok; |
dd257933 | 7395 | *plst = lst; |
5db1c03f JL |
7396 | out: |
7397 | nfs4_put_stateowner(&lo->lo_owner); | |
7398 | return status; | |
64a284d0 BF |
7399 | } |
7400 | ||
1da177e4 LT |
7401 | /* |
7402 | * LOCK operation | |
7403 | */ | |
b37ad28b | 7404 | __be32 |
ca364317 | 7405 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 7406 | union nfsd4_op_u *u) |
1da177e4 | 7407 | { |
eb69853d | 7408 | struct nfsd4_lock *lock = &u->lock; |
fe0750e5 BF |
7409 | struct nfs4_openowner *open_sop = NULL; |
7410 | struct nfs4_lockowner *lock_sop = NULL; | |
3d0fabd5 | 7411 | struct nfs4_ol_stateid *lock_stp = NULL; |
0667b1e9 | 7412 | struct nfs4_ol_stateid *open_stp = NULL; |
7214e860 | 7413 | struct nfs4_file *fp; |
eb82dd39 | 7414 | struct nfsd_file *nf = NULL; |
76d348fa | 7415 | struct nfsd4_blocked_lock *nbl = NULL; |
21179d81 JL |
7416 | struct file_lock *file_lock = NULL; |
7417 | struct file_lock *conflock = NULL; | |
b37ad28b | 7418 | __be32 status = 0; |
b34f27aa | 7419 | int lkflg; |
b8dd7b9a | 7420 | int err; |
5db1c03f | 7421 | bool new = false; |
76d348fa JL |
7422 | unsigned char fl_type; |
7423 | unsigned int fl_flags = FL_POSIX; | |
3320fef1 SK |
7424 | struct net *net = SVC_NET(rqstp); |
7425 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 LT |
7426 | |
7427 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
7428 | (long long) lock->lk_offset, | |
7429 | (long long) lock->lk_length); | |
7430 | ||
1da177e4 LT |
7431 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
7432 | return nfserr_inval; | |
7433 | ||
ca364317 | 7434 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 7435 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
7436 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
7437 | return status; | |
7438 | } | |
7439 | ||
1da177e4 | 7440 | if (lock->lk_is_new) { |
684e5638 BF |
7441 | if (nfsd4_has_session(cstate)) |
7442 | /* See rfc 5661 18.10.3: given clientid is ignored: */ | |
76f6c9e1 | 7443 | memcpy(&lock->lk_new_clientid, |
ec59659b | 7444 | &cstate->clp->cl_clientid, |
684e5638 BF |
7445 | sizeof(clientid_t)); |
7446 | ||
1da177e4 | 7447 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 7448 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
7449 | lock->lk_new_open_seqid, |
7450 | &lock->lk_new_open_stateid, | |
3320fef1 | 7451 | &open_stp, nn); |
37515177 | 7452 | if (status) |
1da177e4 | 7453 | goto out; |
feb9dad5 | 7454 | mutex_unlock(&open_stp->st_mutex); |
fe0750e5 | 7455 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 7456 | status = nfserr_bad_stateid; |
684e5638 | 7457 | if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
76f6c9e1 | 7458 | &lock->lk_new_clientid)) |
b34f27aa | 7459 | goto out; |
64a284d0 | 7460 | status = lookup_or_create_lock_state(cstate, open_stp, lock, |
5db1c03f | 7461 | &lock_stp, &new); |
3d0fabd5 | 7462 | } else { |
dd453dfd | 7463 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
7464 | lock->lk_old_lock_seqid, |
7465 | &lock->lk_old_lock_stateid, | |
3320fef1 | 7466 | NFS4_LOCK_STID, &lock_stp, nn); |
3d0fabd5 | 7467 | } |
e1aaa891 BF |
7468 | if (status) |
7469 | goto out; | |
64a284d0 | 7470 | lock_sop = lockowner(lock_stp->st_stateowner); |
1da177e4 | 7471 | |
b34f27aa BF |
7472 | lkflg = setlkflg(lock->lk_type); |
7473 | status = nfs4_check_openmode(lock_stp, lkflg); | |
7474 | if (status) | |
7475 | goto out; | |
7476 | ||
0dd395dc | 7477 | status = nfserr_grace; |
3320fef1 | 7478 | if (locks_in_grace(net) && !lock->lk_reclaim) |
0dd395dc N |
7479 | goto out; |
7480 | status = nfserr_no_grace; | |
3320fef1 | 7481 | if (!locks_in_grace(net) && lock->lk_reclaim) |
0dd395dc N |
7482 | goto out; |
7483 | ||
bb0a55bb BF |
7484 | if (lock->lk_reclaim) |
7485 | fl_flags |= FL_RECLAIM; | |
7486 | ||
11b9164a | 7487 | fp = lock_stp->st_stid.sc_file; |
1da177e4 | 7488 | switch (lock->lk_type) { |
1da177e4 | 7489 | case NFS4_READW_LT: |
40595cdc | 7490 | if (nfsd4_has_session(cstate)) |
76d348fa | 7491 | fl_flags |= FL_SLEEP; |
df561f66 | 7492 | fallthrough; |
76d348fa | 7493 | case NFS4_READ_LT: |
7214e860 | 7494 | spin_lock(&fp->fi_lock); |
eb82dd39 JL |
7495 | nf = find_readable_file_locked(fp); |
7496 | if (nf) | |
0997b173 | 7497 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); |
7214e860 | 7498 | spin_unlock(&fp->fi_lock); |
76d348fa | 7499 | fl_type = F_RDLCK; |
529d7b2a | 7500 | break; |
1da177e4 | 7501 | case NFS4_WRITEW_LT: |
40595cdc | 7502 | if (nfsd4_has_session(cstate)) |
76d348fa | 7503 | fl_flags |= FL_SLEEP; |
df561f66 | 7504 | fallthrough; |
76d348fa | 7505 | case NFS4_WRITE_LT: |
7214e860 | 7506 | spin_lock(&fp->fi_lock); |
eb82dd39 JL |
7507 | nf = find_writeable_file_locked(fp); |
7508 | if (nf) | |
0997b173 | 7509 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); |
7214e860 | 7510 | spin_unlock(&fp->fi_lock); |
76d348fa | 7511 | fl_type = F_WRLCK; |
529d7b2a | 7512 | break; |
1da177e4 LT |
7513 | default: |
7514 | status = nfserr_inval; | |
7515 | goto out; | |
7516 | } | |
76d348fa | 7517 | |
eb82dd39 | 7518 | if (!nf) { |
f9d7562f BF |
7519 | status = nfserr_openmode; |
7520 | goto out; | |
7521 | } | |
aef9583b | 7522 | |
40595cdc BF |
7523 | /* |
7524 | * Most filesystems with their own ->lock operations will block | |
7525 | * the nfsd thread waiting to acquire the lock. That leads to | |
7526 | * deadlocks (we don't want every nfsd thread tied up waiting | |
7527 | * for file locks), so don't attempt blocking lock notifications | |
7528 | * on those filesystems: | |
7529 | */ | |
7530 | if (nf->nf_file->f_op->lock) | |
7531 | fl_flags &= ~FL_SLEEP; | |
7532 | ||
76d348fa JL |
7533 | nbl = find_or_allocate_block(lock_sop, &fp->fi_fhandle, nn); |
7534 | if (!nbl) { | |
7535 | dprintk("NFSD: %s: unable to allocate block!\n", __func__); | |
7536 | status = nfserr_jukebox; | |
7537 | goto out; | |
7538 | } | |
7539 | ||
7540 | file_lock = &nbl->nbl_lock; | |
7541 | file_lock->fl_type = fl_type; | |
aef9583b | 7542 | file_lock->fl_owner = (fl_owner_t)lockowner(nfs4_get_stateowner(&lock_sop->lo_owner)); |
21179d81 | 7543 | file_lock->fl_pid = current->tgid; |
eb82dd39 | 7544 | file_lock->fl_file = nf->nf_file; |
76d348fa | 7545 | file_lock->fl_flags = fl_flags; |
21179d81 JL |
7546 | file_lock->fl_lmops = &nfsd_posix_mng_ops; |
7547 | file_lock->fl_start = lock->lk_offset; | |
7548 | file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); | |
7549 | nfs4_transform_lock_offset(file_lock); | |
7550 | ||
7551 | conflock = locks_alloc_lock(); | |
7552 | if (!conflock) { | |
7553 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
7554 | status = nfserr_jukebox; | |
7555 | goto out; | |
7556 | } | |
1da177e4 | 7557 | |
76d348fa | 7558 | if (fl_flags & FL_SLEEP) { |
20b7d86f | 7559 | nbl->nbl_time = ktime_get_boottime_seconds(); |
0cc11a61 | 7560 | spin_lock(&nn->blocked_locks_lock); |
76d348fa | 7561 | list_add_tail(&nbl->nbl_list, &lock_sop->lo_blocked); |
7919d0a2 | 7562 | list_add_tail(&nbl->nbl_lru, &nn->blocked_locks_lru); |
47446d74 | 7563 | kref_get(&nbl->nbl_kref); |
0cc11a61 | 7564 | spin_unlock(&nn->blocked_locks_lock); |
76d348fa JL |
7565 | } |
7566 | ||
eb82dd39 | 7567 | err = vfs_lock_file(nf->nf_file, F_SETLK, file_lock, conflock); |
76d348fa | 7568 | switch (err) { |
1da177e4 | 7569 | case 0: /* success! */ |
9767feb2 | 7570 | nfs4_inc_and_copy_stateid(&lock->lk_resp_stateid, &lock_stp->st_stid); |
b8dd7b9a | 7571 | status = 0; |
03f318ca BF |
7572 | if (lock->lk_reclaim) |
7573 | nn->somebody_reclaimed = true; | |
eb76b3fd | 7574 | break; |
76d348fa | 7575 | case FILE_LOCK_DEFERRED: |
47446d74 | 7576 | kref_put(&nbl->nbl_kref, free_nbl); |
76d348fa | 7577 | nbl = NULL; |
df561f66 | 7578 | fallthrough; |
76d348fa | 7579 | case -EAGAIN: /* conflock holds conflicting lock */ |
eb76b3fd AA |
7580 | status = nfserr_denied; |
7581 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
21179d81 | 7582 | nfs4_set_lock_denied(conflock, &lock->lk_denied); |
eb76b3fd | 7583 | break; |
76d348fa | 7584 | case -EDEADLK: |
1da177e4 | 7585 | status = nfserr_deadlock; |
eb76b3fd | 7586 | break; |
3e772463 | 7587 | default: |
fd85b817 | 7588 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 7589 | status = nfserrno(err); |
eb76b3fd | 7590 | break; |
1da177e4 | 7591 | } |
1da177e4 | 7592 | out: |
76d348fa JL |
7593 | if (nbl) { |
7594 | /* dequeue it if we queued it before */ | |
7595 | if (fl_flags & FL_SLEEP) { | |
0cc11a61 | 7596 | spin_lock(&nn->blocked_locks_lock); |
47446d74 VA |
7597 | if (!list_empty(&nbl->nbl_list) && |
7598 | !list_empty(&nbl->nbl_lru)) { | |
7599 | list_del_init(&nbl->nbl_list); | |
7600 | list_del_init(&nbl->nbl_lru); | |
7601 | kref_put(&nbl->nbl_kref, free_nbl); | |
7602 | } | |
7603 | /* nbl can use one of lists to be linked to reaplist */ | |
0cc11a61 | 7604 | spin_unlock(&nn->blocked_locks_lock); |
76d348fa JL |
7605 | } |
7606 | free_blocked_lock(nbl); | |
7607 | } | |
eb82dd39 JL |
7608 | if (nf) |
7609 | nfsd_file_put(nf); | |
5db1c03f JL |
7610 | if (lock_stp) { |
7611 | /* Bump seqid manually if the 4.0 replay owner is openowner */ | |
7612 | if (cstate->replay_owner && | |
7613 | cstate->replay_owner != &lock_sop->lo_owner && | |
7614 | seqid_mutating_err(ntohl(status))) | |
7615 | lock_sop->lo_owner.so_seqid++; | |
7616 | ||
7617 | /* | |
7618 | * If this is a new, never-before-used stateid, and we are | |
7619 | * returning an error, then just go ahead and release it. | |
7620 | */ | |
25020720 | 7621 | if (status && new) |
5db1c03f | 7622 | release_lock_stateid(lock_stp); |
beeca19c TM |
7623 | |
7624 | mutex_unlock(&lock_stp->st_mutex); | |
5db1c03f | 7625 | |
3d0fabd5 | 7626 | nfs4_put_stid(&lock_stp->st_stid); |
5db1c03f | 7627 | } |
0667b1e9 TM |
7628 | if (open_stp) |
7629 | nfs4_put_stid(&open_stp->st_stid); | |
9411b1d4 | 7630 | nfsd4_bump_seqid(cstate, status); |
21179d81 JL |
7631 | if (conflock) |
7632 | locks_free_lock(conflock); | |
1da177e4 LT |
7633 | return status; |
7634 | } | |
7635 | ||
55ef1274 BF |
7636 | /* |
7637 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
7638 | * so we do a temporary open here just to get an open file to pass to | |
0bcc7ca4 | 7639 | * vfs_test_lock. |
55ef1274 | 7640 | */ |
04da6e9d | 7641 | static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) |
55ef1274 | 7642 | { |
6b556ca2 | 7643 | struct nfsd_file *nf; |
bb4d53d6 | 7644 | struct inode *inode; |
217fd6f6 BF |
7645 | __be32 err; |
7646 | ||
7647 | err = nfsd_file_acquire(rqstp, fhp, NFSD_MAY_READ, &nf); | |
7648 | if (err) | |
7649 | return err; | |
bb4d53d6 N |
7650 | inode = fhp->fh_dentry->d_inode; |
7651 | inode_lock(inode); /* to block new leases till after test_lock: */ | |
7652 | err = nfserrno(nfsd_open_break_lease(inode, NFSD_MAY_READ)); | |
217fd6f6 BF |
7653 | if (err) |
7654 | goto out; | |
0bcc7ca4 | 7655 | lock->fl_file = nf->nf_file; |
217fd6f6 | 7656 | err = nfserrno(vfs_test_lock(nf->nf_file, lock)); |
0bcc7ca4 | 7657 | lock->fl_file = NULL; |
217fd6f6 | 7658 | out: |
bb4d53d6 | 7659 | inode_unlock(inode); |
217fd6f6 | 7660 | nfsd_file_put(nf); |
55ef1274 BF |
7661 | return err; |
7662 | } | |
7663 | ||
1da177e4 LT |
7664 | /* |
7665 | * LOCKT operation | |
7666 | */ | |
b37ad28b | 7667 | __be32 |
ca364317 | 7668 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 7669 | union nfsd4_op_u *u) |
1da177e4 | 7670 | { |
eb69853d | 7671 | struct nfsd4_lockt *lockt = &u->lockt; |
21179d81 | 7672 | struct file_lock *file_lock = NULL; |
5db1c03f | 7673 | struct nfs4_lockowner *lo = NULL; |
b37ad28b | 7674 | __be32 status; |
7f2210fa | 7675 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 7676 | |
5ccb0066 | 7677 | if (locks_in_grace(SVC_NET(rqstp))) |
1da177e4 LT |
7678 | return nfserr_grace; |
7679 | ||
7680 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
7681 | return nfserr_inval; | |
7682 | ||
9b2ef62b | 7683 | if (!nfsd4_has_session(cstate)) { |
f71475ba | 7684 | status = set_client(&lockt->lt_clientid, cstate, nn); |
9b2ef62b BF |
7685 | if (status) |
7686 | goto out; | |
7687 | } | |
1da177e4 | 7688 | |
75c096f7 | 7689 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 7690 | goto out; |
1da177e4 | 7691 | |
21179d81 JL |
7692 | file_lock = locks_alloc_lock(); |
7693 | if (!file_lock) { | |
7694 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
7695 | status = nfserr_jukebox; | |
7696 | goto out; | |
7697 | } | |
6cd90662 | 7698 | |
1da177e4 LT |
7699 | switch (lockt->lt_type) { |
7700 | case NFS4_READ_LT: | |
7701 | case NFS4_READW_LT: | |
21179d81 | 7702 | file_lock->fl_type = F_RDLCK; |
f50c9d79 | 7703 | break; |
1da177e4 LT |
7704 | case NFS4_WRITE_LT: |
7705 | case NFS4_WRITEW_LT: | |
21179d81 | 7706 | file_lock->fl_type = F_WRLCK; |
f50c9d79 | 7707 | break; |
1da177e4 | 7708 | default: |
2fdada03 | 7709 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 | 7710 | status = nfserr_inval; |
f50c9d79 | 7711 | goto out; |
1da177e4 LT |
7712 | } |
7713 | ||
c8623999 | 7714 | lo = find_lockowner_str(cstate->clp, &lockt->lt_owner); |
fe0750e5 | 7715 | if (lo) |
21179d81 JL |
7716 | file_lock->fl_owner = (fl_owner_t)lo; |
7717 | file_lock->fl_pid = current->tgid; | |
7718 | file_lock->fl_flags = FL_POSIX; | |
1da177e4 | 7719 | |
21179d81 JL |
7720 | file_lock->fl_start = lockt->lt_offset; |
7721 | file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); | |
1da177e4 | 7722 | |
21179d81 | 7723 | nfs4_transform_lock_offset(file_lock); |
1da177e4 | 7724 | |
21179d81 | 7725 | status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock); |
04da6e9d | 7726 | if (status) |
fd85b817 | 7727 | goto out; |
04da6e9d | 7728 | |
21179d81 | 7729 | if (file_lock->fl_type != F_UNLCK) { |
1da177e4 | 7730 | status = nfserr_denied; |
21179d81 | 7731 | nfs4_set_lock_denied(file_lock, &lockt->lt_denied); |
1da177e4 LT |
7732 | } |
7733 | out: | |
5db1c03f JL |
7734 | if (lo) |
7735 | nfs4_put_stateowner(&lo->lo_owner); | |
21179d81 JL |
7736 | if (file_lock) |
7737 | locks_free_lock(file_lock); | |
1da177e4 LT |
7738 | return status; |
7739 | } | |
7740 | ||
b37ad28b | 7741 | __be32 |
ca364317 | 7742 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 7743 | union nfsd4_op_u *u) |
1da177e4 | 7744 | { |
eb69853d | 7745 | struct nfsd4_locku *locku = &u->locku; |
dcef0413 | 7746 | struct nfs4_ol_stateid *stp; |
eb82dd39 | 7747 | struct nfsd_file *nf = NULL; |
21179d81 | 7748 | struct file_lock *file_lock = NULL; |
b37ad28b | 7749 | __be32 status; |
b8dd7b9a | 7750 | int err; |
3320fef1 SK |
7751 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
7752 | ||
1da177e4 LT |
7753 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", |
7754 | (long long) locku->lu_offset, | |
7755 | (long long) locku->lu_length); | |
7756 | ||
7757 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
7758 | return nfserr_inval; | |
7759 | ||
9072d5c6 | 7760 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
3320fef1 SK |
7761 | &locku->lu_stateid, NFS4_LOCK_STID, |
7762 | &stp, nn); | |
9072d5c6 | 7763 | if (status) |
1da177e4 | 7764 | goto out; |
eb82dd39 JL |
7765 | nf = find_any_file(stp->st_stid.sc_file); |
7766 | if (!nf) { | |
f9d7562f | 7767 | status = nfserr_lock_range; |
858cc573 | 7768 | goto put_stateid; |
f9d7562f | 7769 | } |
21179d81 JL |
7770 | file_lock = locks_alloc_lock(); |
7771 | if (!file_lock) { | |
7772 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
7773 | status = nfserr_jukebox; | |
eb82dd39 | 7774 | goto put_file; |
21179d81 | 7775 | } |
6cd90662 | 7776 | |
21179d81 | 7777 | file_lock->fl_type = F_UNLCK; |
aef9583b | 7778 | file_lock->fl_owner = (fl_owner_t)lockowner(nfs4_get_stateowner(stp->st_stateowner)); |
21179d81 | 7779 | file_lock->fl_pid = current->tgid; |
eb82dd39 | 7780 | file_lock->fl_file = nf->nf_file; |
21179d81 JL |
7781 | file_lock->fl_flags = FL_POSIX; |
7782 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
7783 | file_lock->fl_start = locku->lu_offset; | |
7784 | ||
7785 | file_lock->fl_end = last_byte_offset(locku->lu_offset, | |
7786 | locku->lu_length); | |
7787 | nfs4_transform_lock_offset(file_lock); | |
1da177e4 | 7788 | |
eb82dd39 | 7789 | err = vfs_lock_file(nf->nf_file, F_SETLK, file_lock, NULL); |
b8dd7b9a | 7790 | if (err) { |
fd85b817 | 7791 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
7792 | goto out_nfserr; |
7793 | } | |
9767feb2 | 7794 | nfs4_inc_and_copy_stateid(&locku->lu_stateid, &stp->st_stid); |
eb82dd39 JL |
7795 | put_file: |
7796 | nfsd_file_put(nf); | |
858cc573 | 7797 | put_stateid: |
feb9dad5 | 7798 | mutex_unlock(&stp->st_mutex); |
858cc573 | 7799 | nfs4_put_stid(&stp->st_stid); |
1da177e4 | 7800 | out: |
9411b1d4 | 7801 | nfsd4_bump_seqid(cstate, status); |
21179d81 JL |
7802 | if (file_lock) |
7803 | locks_free_lock(file_lock); | |
1da177e4 LT |
7804 | return status; |
7805 | ||
7806 | out_nfserr: | |
b8dd7b9a | 7807 | status = nfserrno(err); |
eb82dd39 | 7808 | goto put_file; |
1da177e4 LT |
7809 | } |
7810 | ||
7811 | /* | |
7812 | * returns | |
f9c00c3a JL |
7813 | * true: locks held by lockowner |
7814 | * false: no locks held by lockowner | |
1da177e4 | 7815 | */ |
f9c00c3a JL |
7816 | static bool |
7817 | check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner) | |
1da177e4 | 7818 | { |
bd61e0a9 | 7819 | struct file_lock *fl; |
f9c00c3a | 7820 | int status = false; |
eb82dd39 | 7821 | struct nfsd_file *nf = find_any_file(fp); |
f9c00c3a | 7822 | struct inode *inode; |
bd61e0a9 | 7823 | struct file_lock_context *flctx; |
f9c00c3a | 7824 | |
eb82dd39 | 7825 | if (!nf) { |
f9c00c3a JL |
7826 | /* Any valid lock stateid should have some sort of access */ |
7827 | WARN_ON_ONCE(1); | |
7828 | return status; | |
7829 | } | |
7830 | ||
c65454a9 | 7831 | inode = file_inode(nf->nf_file); |
77c67530 | 7832 | flctx = locks_inode_context(inode); |
bd61e0a9 JL |
7833 | |
7834 | if (flctx && !list_empty_careful(&flctx->flc_posix)) { | |
6109c850 | 7835 | spin_lock(&flctx->flc_lock); |
bd61e0a9 JL |
7836 | list_for_each_entry(fl, &flctx->flc_posix, fl_list) { |
7837 | if (fl->fl_owner == (fl_owner_t)lowner) { | |
7838 | status = true; | |
7839 | break; | |
7840 | } | |
796dadfd | 7841 | } |
6109c850 | 7842 | spin_unlock(&flctx->flc_lock); |
1da177e4 | 7843 | } |
eb82dd39 | 7844 | nfsd_file_put(nf); |
1da177e4 LT |
7845 | return status; |
7846 | } | |
7847 | ||
043862b0 CL |
7848 | /** |
7849 | * nfsd4_release_lockowner - process NFSv4.0 RELEASE_LOCKOWNER operations | |
7850 | * @rqstp: RPC transaction | |
7851 | * @cstate: NFSv4 COMPOUND state | |
7852 | * @u: RELEASE_LOCKOWNER arguments | |
7853 | * | |
7854 | * The lockowner's so_count is bumped when a lock record is added | |
7855 | * or when copying a conflicting lock. The latter case is brief, | |
7856 | * but can lead to fleeting false positives when looking for | |
7857 | * locks-in-use. | |
7858 | * | |
7859 | * Return values: | |
7860 | * %nfs_ok: lockowner released or not found | |
7861 | * %nfserr_locks_held: lockowner still in use | |
7862 | * %nfserr_stale_clientid: clientid no longer active | |
7863 | * %nfserr_expired: clientid not recognized | |
7864 | */ | |
b37ad28b | 7865 | __be32 |
b591480b BF |
7866 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
7867 | struct nfsd4_compound_state *cstate, | |
eb69853d | 7868 | union nfsd4_op_u *u) |
1da177e4 | 7869 | { |
eb69853d | 7870 | struct nfsd4_release_lockowner *rlockowner = &u->release_lockowner; |
bd8fdb6e | 7871 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 7872 | clientid_t *clid = &rlockowner->rl_clientid; |
dcef0413 | 7873 | struct nfs4_ol_stateid *stp; |
bd8fdb6e | 7874 | struct nfs4_lockowner *lo; |
c58c6610 | 7875 | struct nfs4_client *clp; |
bd8fdb6e CL |
7876 | LIST_HEAD(reaplist); |
7877 | __be32 status; | |
1da177e4 LT |
7878 | |
7879 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
7880 | clid->cl_boot, clid->cl_id); | |
7881 | ||
f71475ba | 7882 | status = set_client(clid, cstate, nn); |
9b2ef62b | 7883 | if (status) |
51f5e783 | 7884 | return status; |
d4f0489f | 7885 | clp = cstate->clp; |
fd44907c | 7886 | |
bd8fdb6e CL |
7887 | spin_lock(&clp->cl_lock); |
7888 | lo = find_lockowner_str_locked(clp, &rlockowner->rl_owner); | |
88584818 CL |
7889 | if (!lo) { |
7890 | spin_unlock(&clp->cl_lock); | |
043862b0 | 7891 | return nfs_ok; |
88584818 | 7892 | } |
bd8fdb6e CL |
7893 | if (atomic_read(&lo->lo_owner.so_count) != 2) { |
7894 | spin_unlock(&clp->cl_lock); | |
7895 | nfs4_put_stateowner(&lo->lo_owner); | |
7896 | return nfserr_locks_held; | |
7897 | } | |
88584818 CL |
7898 | unhash_lockowner_locked(lo); |
7899 | while (!list_empty(&lo->lo_owner.so_stateids)) { | |
7900 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
7901 | struct nfs4_ol_stateid, | |
7902 | st_perstateowner); | |
7903 | WARN_ON(!unhash_lock_stateid(stp)); | |
7904 | put_ol_stateid_locked(stp, &reaplist); | |
7905 | } | |
c58c6610 | 7906 | spin_unlock(&clp->cl_lock); |
043862b0 | 7907 | |
88584818 | 7908 | free_ol_stateid_reaplist(&reaplist); |
68ef3bc3 | 7909 | remove_blocked_locks(lo); |
88584818 | 7910 | nfs4_put_stateowner(&lo->lo_owner); |
043862b0 | 7911 | return nfs_ok; |
1da177e4 LT |
7912 | } |
7913 | ||
7914 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 7915 | alloc_reclaim(void) |
1da177e4 | 7916 | { |
a55370a3 | 7917 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
7918 | } |
7919 | ||
0ce0c2b5 | 7920 | bool |
6b189105 | 7921 | nfs4_has_reclaimed_state(struct xdr_netobj name, struct nfsd_net *nn) |
c7b9a459 | 7922 | { |
0ce0c2b5 | 7923 | struct nfs4_client_reclaim *crp; |
c7b9a459 | 7924 | |
52e19c09 | 7925 | crp = nfsd4_find_reclaim_client(name, nn); |
0ce0c2b5 | 7926 | return (crp && crp->cr_clp); |
c7b9a459 N |
7927 | } |
7928 | ||
1da177e4 LT |
7929 | /* |
7930 | * failure => all reset bets are off, nfserr_no_grace... | |
6b189105 SM |
7931 | * |
7932 | * The caller is responsible for freeing name.data if NULL is returned (it | |
7933 | * will be freed in nfs4_remove_reclaim_record in the normal case). | |
1da177e4 | 7934 | */ |
772a9bbb | 7935 | struct nfs4_client_reclaim * |
6ee95d1c SM |
7936 | nfs4_client_to_reclaim(struct xdr_netobj name, struct xdr_netobj princhash, |
7937 | struct nfsd_net *nn) | |
1da177e4 LT |
7938 | { |
7939 | unsigned int strhashval; | |
772a9bbb | 7940 | struct nfs4_client_reclaim *crp; |
1da177e4 | 7941 | |
a55370a3 | 7942 | crp = alloc_reclaim(); |
772a9bbb JL |
7943 | if (crp) { |
7944 | strhashval = clientstr_hashval(name); | |
7945 | INIT_LIST_HEAD(&crp->cr_strhash); | |
52e19c09 | 7946 | list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]); |
6b189105 SM |
7947 | crp->cr_name.data = name.data; |
7948 | crp->cr_name.len = name.len; | |
6ee95d1c SM |
7949 | crp->cr_princhash.data = princhash.data; |
7950 | crp->cr_princhash.len = princhash.len; | |
0ce0c2b5 | 7951 | crp->cr_clp = NULL; |
52e19c09 | 7952 | nn->reclaim_str_hashtbl_size++; |
772a9bbb JL |
7953 | } |
7954 | return crp; | |
1da177e4 LT |
7955 | } |
7956 | ||
ce30e539 | 7957 | void |
52e19c09 | 7958 | nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn) |
ce30e539 JL |
7959 | { |
7960 | list_del(&crp->cr_strhash); | |
6b189105 | 7961 | kfree(crp->cr_name.data); |
6ee95d1c | 7962 | kfree(crp->cr_princhash.data); |
ce30e539 | 7963 | kfree(crp); |
52e19c09 | 7964 | nn->reclaim_str_hashtbl_size--; |
ce30e539 JL |
7965 | } |
7966 | ||
2a4317c5 | 7967 | void |
52e19c09 | 7968 | nfs4_release_reclaim(struct nfsd_net *nn) |
1da177e4 LT |
7969 | { |
7970 | struct nfs4_client_reclaim *crp = NULL; | |
7971 | int i; | |
7972 | ||
1da177e4 | 7973 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
52e19c09 SK |
7974 | while (!list_empty(&nn->reclaim_str_hashtbl[i])) { |
7975 | crp = list_entry(nn->reclaim_str_hashtbl[i].next, | |
1da177e4 | 7976 | struct nfs4_client_reclaim, cr_strhash); |
52e19c09 | 7977 | nfs4_remove_reclaim_record(crp, nn); |
1da177e4 LT |
7978 | } |
7979 | } | |
063b0fb9 | 7980 | WARN_ON_ONCE(nn->reclaim_str_hashtbl_size); |
1da177e4 LT |
7981 | } |
7982 | ||
7983 | /* | |
7984 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
2a4317c5 | 7985 | struct nfs4_client_reclaim * |
6b189105 | 7986 | nfsd4_find_reclaim_client(struct xdr_netobj name, struct nfsd_net *nn) |
1da177e4 LT |
7987 | { |
7988 | unsigned int strhashval; | |
1da177e4 LT |
7989 | struct nfs4_client_reclaim *crp = NULL; |
7990 | ||
6b189105 | 7991 | strhashval = clientstr_hashval(name); |
52e19c09 | 7992 | list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) { |
6b189105 | 7993 | if (compare_blob(&crp->cr_name, &name) == 0) { |
1da177e4 LT |
7994 | return crp; |
7995 | } | |
7996 | } | |
7997 | return NULL; | |
7998 | } | |
7999 | ||
b37ad28b | 8000 | __be32 |
1722b046 | 8001 | nfs4_check_open_reclaim(struct nfs4_client *clp) |
1da177e4 | 8002 | { |
1722b046 | 8003 | if (test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, &clp->cl_flags)) |
3b3e7b72 JL |
8004 | return nfserr_no_grace; |
8005 | ||
1722b046 | 8006 | if (nfsd4_client_record_check(clp)) |
0fe492db TM |
8007 | return nfserr_reclaim_bad; |
8008 | ||
8009 | return nfs_ok; | |
1da177e4 LT |
8010 | } |
8011 | ||
c2f1a551 MS |
8012 | /* |
8013 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
8014 | * client may quite reasonably hang on to a delegation as long as it has | |
8015 | * the inode cached. This becomes an obvious problem the first time a | |
8016 | * client's inode cache approaches the size of the server's total memory. | |
8017 | * | |
8018 | * For now we avoid this problem by imposing a hard limit on the number | |
8019 | * of delegations, which varies according to the server's memory size. | |
8020 | */ | |
8021 | static void | |
8022 | set_max_delegations(void) | |
8023 | { | |
8024 | /* | |
8025 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
8026 | * estimates suggest that in the worst case (where every delegation | |
8027 | * is for a different inode), a delegation could take about 1.5K, | |
8028 | * giving a worst case usage of about 6% of memory. | |
8029 | */ | |
8030 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
8031 | } | |
8032 | ||
d85ed443 | 8033 | static int nfs4_state_create_net(struct net *net) |
8daae4dc SK |
8034 | { |
8035 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
8036 | int i; | |
8037 | ||
6da2ec56 KC |
8038 | nn->conf_id_hashtbl = kmalloc_array(CLIENT_HASH_SIZE, |
8039 | sizeof(struct list_head), | |
8040 | GFP_KERNEL); | |
8daae4dc | 8041 | if (!nn->conf_id_hashtbl) |
382a62e7 | 8042 | goto err; |
6da2ec56 KC |
8043 | nn->unconf_id_hashtbl = kmalloc_array(CLIENT_HASH_SIZE, |
8044 | sizeof(struct list_head), | |
8045 | GFP_KERNEL); | |
0a7ec377 SK |
8046 | if (!nn->unconf_id_hashtbl) |
8047 | goto err_unconf_id; | |
6da2ec56 KC |
8048 | nn->sessionid_hashtbl = kmalloc_array(SESSION_HASH_SIZE, |
8049 | sizeof(struct list_head), | |
8050 | GFP_KERNEL); | |
1872de0e SK |
8051 | if (!nn->sessionid_hashtbl) |
8052 | goto err_sessionid; | |
8daae4dc | 8053 | |
382a62e7 | 8054 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
8daae4dc | 8055 | INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]); |
0a7ec377 | 8056 | INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]); |
382a62e7 | 8057 | } |
1872de0e SK |
8058 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
8059 | INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]); | |
382a62e7 | 8060 | nn->conf_name_tree = RB_ROOT; |
a99454aa | 8061 | nn->unconf_name_tree = RB_ROOT; |
9cc76801 | 8062 | nn->boot_time = ktime_get_real_seconds(); |
81833de1 VA |
8063 | nn->grace_ended = false; |
8064 | nn->nfsd4_manager.block_opens = true; | |
8065 | INIT_LIST_HEAD(&nn->nfsd4_manager.list); | |
5ed58bb2 | 8066 | INIT_LIST_HEAD(&nn->client_lru); |
73758fed | 8067 | INIT_LIST_HEAD(&nn->close_lru); |
e8c69d17 | 8068 | INIT_LIST_HEAD(&nn->del_recall_lru); |
c9a49628 | 8069 | spin_lock_init(&nn->client_lock); |
e0639dc5 OK |
8070 | spin_lock_init(&nn->s2s_cp_lock); |
8071 | idr_init(&nn->s2s_cp_stateids); | |
8daae4dc | 8072 | |
0cc11a61 JL |
8073 | spin_lock_init(&nn->blocked_locks_lock); |
8074 | INIT_LIST_HEAD(&nn->blocked_locks_lru); | |
8075 | ||
09121281 | 8076 | INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main); |
a1049eb4 | 8077 | INIT_DELAYED_WORK(&nn->nfsd_shrinker_work, nfsd4_state_shrinker_worker); |
d85ed443 | 8078 | get_net(net); |
09121281 | 8079 | |
8daae4dc | 8080 | return 0; |
382a62e7 | 8081 | |
1872de0e | 8082 | err_sessionid: |
9b531137 | 8083 | kfree(nn->unconf_id_hashtbl); |
0a7ec377 SK |
8084 | err_unconf_id: |
8085 | kfree(nn->conf_id_hashtbl); | |
382a62e7 SK |
8086 | err: |
8087 | return -ENOMEM; | |
8daae4dc SK |
8088 | } |
8089 | ||
8090 | static void | |
4dce0ac9 | 8091 | nfs4_state_destroy_net(struct net *net) |
8daae4dc SK |
8092 | { |
8093 | int i; | |
8094 | struct nfs4_client *clp = NULL; | |
8095 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
8096 | ||
8097 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { | |
8098 | while (!list_empty(&nn->conf_id_hashtbl[i])) { | |
8099 | clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
8100 | destroy_client(clp); | |
8101 | } | |
8102 | } | |
a99454aa | 8103 | |
68ef3bc3 JL |
8104 | WARN_ON(!list_empty(&nn->blocked_locks_lru)); |
8105 | ||
2b905635 KM |
8106 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
8107 | while (!list_empty(&nn->unconf_id_hashtbl[i])) { | |
8108 | clp = list_entry(nn->unconf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
8109 | destroy_client(clp); | |
8110 | } | |
a99454aa SK |
8111 | } |
8112 | ||
1872de0e | 8113 | kfree(nn->sessionid_hashtbl); |
0a7ec377 | 8114 | kfree(nn->unconf_id_hashtbl); |
8daae4dc | 8115 | kfree(nn->conf_id_hashtbl); |
4dce0ac9 | 8116 | put_net(net); |
8daae4dc SK |
8117 | } |
8118 | ||
f252bc68 | 8119 | int |
d85ed443 | 8120 | nfs4_state_start_net(struct net *net) |
ac4d8ff2 | 8121 | { |
5e1533c7 | 8122 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b5a1a81e BF |
8123 | int ret; |
8124 | ||
681370f4 | 8125 | ret = nfs4_state_create_net(net); |
c6c7f2a8 | 8126 | if (ret) |
681370f4 | 8127 | return ret; |
d4318acd JL |
8128 | locks_start_grace(net, &nn->nfsd4_manager); |
8129 | nfsd4_client_tracking_init(net); | |
362063a5 SM |
8130 | if (nn->track_reclaim_completes && nn->reclaim_str_hashtbl_size == 0) |
8131 | goto skip_grace; | |
20b7d86f | 8132 | printk(KERN_INFO "NFSD: starting %lld-second grace period (net %x)\n", |
7e981a8a | 8133 | nn->nfsd4_grace, net->ns.inum); |
dd5e3fbc | 8134 | trace_nfsd_grace_start(nn); |
5284b44e | 8135 | queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ); |
d85ed443 | 8136 | return 0; |
362063a5 SM |
8137 | |
8138 | skip_grace: | |
8139 | printk(KERN_INFO "NFSD: no clients to reclaim, skipping NFSv4 grace period (net %x)\n", | |
8140 | net->ns.inum); | |
8141 | queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_lease * HZ); | |
8142 | nfsd4_end_grace(nn); | |
8143 | return 0; | |
d85ed443 SK |
8144 | } |
8145 | ||
8146 | /* initialization to perform when the nfsd service is started: */ | |
8147 | ||
8148 | int | |
8149 | nfs4_state_start(void) | |
8150 | { | |
8151 | int ret; | |
8152 | ||
d47b295e | 8153 | ret = rhltable_init(&nfs4_file_rhltable, &nfs4_file_rhash_params); |
b5a1a81e | 8154 | if (ret) |
d76cc46b | 8155 | return ret; |
09121281 | 8156 | |
d47b295e CL |
8157 | ret = nfsd4_create_callback_queue(); |
8158 | if (ret) { | |
8159 | rhltable_destroy(&nfs4_file_rhltable); | |
8160 | return ret; | |
8161 | } | |
8162 | ||
c2f1a551 | 8163 | set_max_delegations(); |
b5a1a81e | 8164 | return 0; |
1da177e4 LT |
8165 | } |
8166 | ||
f252bc68 | 8167 | void |
4dce0ac9 | 8168 | nfs4_state_shutdown_net(struct net *net) |
1da177e4 | 8169 | { |
1da177e4 | 8170 | struct nfs4_delegation *dp = NULL; |
1da177e4 | 8171 | struct list_head *pos, *next, reaplist; |
4dce0ac9 | 8172 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
1da177e4 | 8173 | |
4dce0ac9 SK |
8174 | cancel_delayed_work_sync(&nn->laundromat_work); |
8175 | locks_end_grace(&nn->nfsd4_manager); | |
ac55fdc4 | 8176 | |
1da177e4 | 8177 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 8178 | spin_lock(&state_lock); |
e8c69d17 | 8179 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 | 8180 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
3fcbbd24 | 8181 | WARN_ON(!unhash_delegation_locked(dp)); |
42690676 | 8182 | list_add(&dp->dl_recall_lru, &reaplist); |
1da177e4 | 8183 | } |
cdc97505 | 8184 | spin_unlock(&state_lock); |
1da177e4 LT |
8185 | list_for_each_safe(pos, next, &reaplist) { |
8186 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
42690676 | 8187 | list_del_init(&dp->dl_recall_lru); |
0af6e690 | 8188 | destroy_unhashed_deleg(dp); |
1da177e4 LT |
8189 | } |
8190 | ||
3320fef1 | 8191 | nfsd4_client_tracking_exit(net); |
4dce0ac9 | 8192 | nfs4_state_destroy_net(net); |
d47b295e | 8193 | rhltable_destroy(&nfs4_file_rhltable); |
f4e44b39 DN |
8194 | #ifdef CONFIG_NFSD_V4_2_INTER_SSC |
8195 | nfsd4_ssc_shutdown_umount(nn); | |
8196 | #endif | |
1da177e4 LT |
8197 | } |
8198 | ||
8199 | void | |
8200 | nfs4_state_shutdown(void) | |
8201 | { | |
c3935e30 | 8202 | nfsd4_destroy_callback_queue(); |
1da177e4 | 8203 | } |
8b70484c TM |
8204 | |
8205 | static void | |
8206 | get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
8207 | { | |
51100d2b OK |
8208 | if (HAS_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG) && |
8209 | CURRENT_STATEID(stateid)) | |
37c593c5 | 8210 | memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); |
8b70484c TM |
8211 | } |
8212 | ||
8213 | static void | |
8214 | put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
8215 | { | |
37c593c5 TM |
8216 | if (cstate->minorversion) { |
8217 | memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); | |
51100d2b | 8218 | SET_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG); |
37c593c5 TM |
8219 | } |
8220 | } | |
8221 | ||
8222 | void | |
8223 | clear_current_stateid(struct nfsd4_compound_state *cstate) | |
8224 | { | |
51100d2b | 8225 | CLEAR_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG); |
8b70484c TM |
8226 | } |
8227 | ||
62cd4a59 TM |
8228 | /* |
8229 | * functions to set current state id | |
8230 | */ | |
9428fe1a | 8231 | void |
b60e9859 CH |
8232 | nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, |
8233 | union nfsd4_op_u *u) | |
9428fe1a | 8234 | { |
b60e9859 | 8235 | put_stateid(cstate, &u->open_downgrade.od_stateid); |
9428fe1a TM |
8236 | } |
8237 | ||
8b70484c | 8238 | void |
b60e9859 CH |
8239 | nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, |
8240 | union nfsd4_op_u *u) | |
8b70484c | 8241 | { |
b60e9859 | 8242 | put_stateid(cstate, &u->open.op_stateid); |
8b70484c TM |
8243 | } |
8244 | ||
62cd4a59 | 8245 | void |
b60e9859 CH |
8246 | nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, |
8247 | union nfsd4_op_u *u) | |
62cd4a59 | 8248 | { |
b60e9859 | 8249 | put_stateid(cstate, &u->close.cl_stateid); |
62cd4a59 TM |
8250 | } |
8251 | ||
8252 | void | |
b60e9859 CH |
8253 | nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, |
8254 | union nfsd4_op_u *u) | |
62cd4a59 | 8255 | { |
b60e9859 | 8256 | put_stateid(cstate, &u->lock.lk_resp_stateid); |
62cd4a59 TM |
8257 | } |
8258 | ||
8259 | /* | |
8260 | * functions to consume current state id | |
8261 | */ | |
1e97b519 | 8262 | |
9428fe1a | 8263 | void |
57832e7b CH |
8264 | nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, |
8265 | union nfsd4_op_u *u) | |
9428fe1a | 8266 | { |
57832e7b | 8267 | get_stateid(cstate, &u->open_downgrade.od_stateid); |
9428fe1a TM |
8268 | } |
8269 | ||
8270 | void | |
57832e7b CH |
8271 | nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, |
8272 | union nfsd4_op_u *u) | |
9428fe1a | 8273 | { |
57832e7b | 8274 | get_stateid(cstate, &u->delegreturn.dr_stateid); |
9428fe1a TM |
8275 | } |
8276 | ||
1e97b519 | 8277 | void |
57832e7b CH |
8278 | nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, |
8279 | union nfsd4_op_u *u) | |
1e97b519 | 8280 | { |
57832e7b | 8281 | get_stateid(cstate, &u->free_stateid.fr_stateid); |
1e97b519 TM |
8282 | } |
8283 | ||
8284 | void | |
57832e7b CH |
8285 | nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, |
8286 | union nfsd4_op_u *u) | |
1e97b519 | 8287 | { |
57832e7b | 8288 | get_stateid(cstate, &u->setattr.sa_stateid); |
1e97b519 TM |
8289 | } |
8290 | ||
8b70484c | 8291 | void |
57832e7b CH |
8292 | nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, |
8293 | union nfsd4_op_u *u) | |
8b70484c | 8294 | { |
57832e7b | 8295 | get_stateid(cstate, &u->close.cl_stateid); |
8b70484c TM |
8296 | } |
8297 | ||
8298 | void | |
57832e7b CH |
8299 | nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, |
8300 | union nfsd4_op_u *u) | |
8b70484c | 8301 | { |
57832e7b | 8302 | get_stateid(cstate, &u->locku.lu_stateid); |
8b70484c | 8303 | } |
30813e27 TM |
8304 | |
8305 | void | |
57832e7b CH |
8306 | nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, |
8307 | union nfsd4_op_u *u) | |
30813e27 | 8308 | { |
57832e7b | 8309 | get_stateid(cstate, &u->read.rd_stateid); |
30813e27 TM |
8310 | } |
8311 | ||
8312 | void | |
57832e7b CH |
8313 | nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, |
8314 | union nfsd4_op_u *u) | |
30813e27 | 8315 | { |
57832e7b | 8316 | get_stateid(cstate, &u->write.wr_stateid); |
30813e27 | 8317 | } |