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> |
f4e44b39 | 47 | #include <linux/nfs_ssc.h> |
9a74af21 | 48 | #include "xdr4.h" |
06b332a5 | 49 | #include "xdr4cb.h" |
0a3adade | 50 | #include "vfs.h" |
bfa4b365 | 51 | #include "current_stateid.h" |
1da177e4 | 52 | |
5e1533c7 | 53 | #include "netns.h" |
9cf514cc | 54 | #include "pnfs.h" |
fd4f83fd | 55 | #include "filecache.h" |
dd5e3fbc | 56 | #include "trace.h" |
5e1533c7 | 57 | |
1da177e4 LT |
58 | #define NFSDDBG_FACILITY NFSDDBG_PROC |
59 | ||
f32f3c2d BF |
60 | #define all_ones {{~0,~0},~0} |
61 | static const stateid_t one_stateid = { | |
62 | .si_generation = ~0, | |
63 | .si_opaque = all_ones, | |
64 | }; | |
65 | static const stateid_t zero_stateid = { | |
66 | /* all fields zero */ | |
67 | }; | |
19ff0f28 TM |
68 | static const stateid_t currentstateid = { |
69 | .si_generation = 1, | |
70 | }; | |
fb500a7c TM |
71 | static const stateid_t close_stateid = { |
72 | .si_generation = 0xffffffffU, | |
73 | }; | |
f32f3c2d | 74 | |
ec6b5d7b | 75 | static u64 current_sessionid = 1; |
fd39ca9a | 76 | |
f32f3c2d BF |
77 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t))) |
78 | #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t))) | |
19ff0f28 | 79 | #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t))) |
ae254dac | 80 | #define CLOSE_STATEID(stateid) (!memcmp((stateid), &close_stateid, sizeof(stateid_t))) |
1da177e4 | 81 | |
1da177e4 | 82 | /* forward declarations */ |
f9c00c3a | 83 | static bool check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner); |
6011695d | 84 | static void nfs4_free_ol_stateid(struct nfs4_stid *stid); |
362063a5 | 85 | void nfsd4_end_grace(struct nfsd_net *nn); |
624322f1 | 86 | static void _free_cpntf_state_locked(struct nfsd_net *nn, struct nfs4_cpntf_state *cps); |
1da177e4 | 87 | |
8b671b80 BF |
88 | /* Locking: */ |
89 | ||
8b671b80 BF |
90 | /* |
91 | * Currently used for the del_recall_lru and file hash table. In an | |
92 | * effort to decrease the scope of the client_mutex, this spinlock may | |
93 | * eventually cover more: | |
94 | */ | |
cdc97505 | 95 | static DEFINE_SPINLOCK(state_lock); |
8b671b80 | 96 | |
4f34bd05 AE |
97 | enum nfsd4_st_mutex_lock_subclass { |
98 | OPEN_STATEID_MUTEX = 0, | |
99 | LOCK_STATEID_MUTEX = 1, | |
100 | }; | |
101 | ||
b401be22 JL |
102 | /* |
103 | * A waitqueue for all in-progress 4.0 CLOSE operations that are waiting for | |
104 | * the refcount on the open stateid to drop. | |
105 | */ | |
106 | static DECLARE_WAIT_QUEUE_HEAD(close_wq); | |
107 | ||
89c905be BF |
108 | /* |
109 | * A waitqueue where a writer to clients/#/ctl destroying a client can | |
110 | * wait for cl_rpc_users to drop to 0 and then for the client to be | |
111 | * unhashed. | |
112 | */ | |
113 | static DECLARE_WAIT_QUEUE_HEAD(expiry_wq); | |
114 | ||
9258a2d5 | 115 | static struct kmem_cache *client_slab; |
abf1135b CH |
116 | static struct kmem_cache *openowner_slab; |
117 | static struct kmem_cache *lockowner_slab; | |
118 | static struct kmem_cache *file_slab; | |
119 | static struct kmem_cache *stateid_slab; | |
120 | static struct kmem_cache *deleg_slab; | |
8287f009 | 121 | static struct kmem_cache *odstate_slab; |
e60d4398 | 122 | |
66b2b9b2 | 123 | static void free_session(struct nfsd4_session *); |
508dc6e1 | 124 | |
c4cb8974 | 125 | static const struct nfsd4_callback_ops nfsd4_cb_recall_ops; |
76d348fa | 126 | static const struct nfsd4_callback_ops nfsd4_cb_notify_lock_ops; |
0162ac2b | 127 | |
66af2579 DN |
128 | static struct workqueue_struct *laundry_wq; |
129 | ||
d76cc46b DN |
130 | int nfsd4_create_laundry_wq(void) |
131 | { | |
132 | int rc = 0; | |
133 | ||
134 | laundry_wq = alloc_workqueue("%s", WQ_UNBOUND, 0, "nfsd4"); | |
135 | if (laundry_wq == NULL) | |
136 | rc = -ENOMEM; | |
137 | return rc; | |
138 | } | |
139 | ||
140 | void nfsd4_destroy_laundry_wq(void) | |
141 | { | |
142 | destroy_workqueue(laundry_wq); | |
143 | } | |
144 | ||
f0f51f5c | 145 | static bool is_session_dead(struct nfsd4_session *ses) |
66b2b9b2 | 146 | { |
f0f51f5c | 147 | return ses->se_flags & NFS4_SESSION_DEAD; |
66b2b9b2 BF |
148 | } |
149 | ||
f0f51f5c | 150 | static __be32 mark_session_dead_locked(struct nfsd4_session *ses, int ref_held_by_me) |
508dc6e1 | 151 | { |
f0f51f5c | 152 | if (atomic_read(&ses->se_ref) > ref_held_by_me) |
66b2b9b2 BF |
153 | return nfserr_jukebox; |
154 | ses->se_flags |= NFS4_SESSION_DEAD; | |
155 | return nfs_ok; | |
508dc6e1 BH |
156 | } |
157 | ||
221a6876 BF |
158 | static bool is_client_expired(struct nfs4_client *clp) |
159 | { | |
160 | return clp->cl_time == 0; | |
161 | } | |
162 | ||
3a4ea23d DN |
163 | static void nfsd4_dec_courtesy_client_count(struct nfsd_net *nn, |
164 | struct nfs4_client *clp) | |
165 | { | |
166 | if (clp->cl_state != NFSD4_ACTIVE) | |
167 | atomic_add_unless(&nn->nfsd_courtesy_clients, -1, 0); | |
168 | } | |
169 | ||
221a6876 BF |
170 | static __be32 get_client_locked(struct nfs4_client *clp) |
171 | { | |
0a880a28 TM |
172 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
173 | ||
174 | lockdep_assert_held(&nn->client_lock); | |
175 | ||
221a6876 BF |
176 | if (is_client_expired(clp)) |
177 | return nfserr_expired; | |
14ed14cc | 178 | atomic_inc(&clp->cl_rpc_users); |
3a4ea23d | 179 | nfsd4_dec_courtesy_client_count(nn, clp); |
66af2579 | 180 | clp->cl_state = NFSD4_ACTIVE; |
221a6876 BF |
181 | return nfs_ok; |
182 | } | |
183 | ||
184 | /* must be called under the client_lock */ | |
185 | static inline void | |
186 | renew_client_locked(struct nfs4_client *clp) | |
187 | { | |
188 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
189 | ||
190 | if (is_client_expired(clp)) { | |
191 | WARN_ON(1); | |
192 | printk("%s: client (clientid %08x/%08x) already expired\n", | |
193 | __func__, | |
194 | clp->cl_clientid.cl_boot, | |
195 | clp->cl_clientid.cl_id); | |
196 | return; | |
197 | } | |
198 | ||
221a6876 | 199 | list_move_tail(&clp->cl_lru, &nn->client_lru); |
20b7d86f | 200 | clp->cl_time = ktime_get_boottime_seconds(); |
3a4ea23d | 201 | nfsd4_dec_courtesy_client_count(nn, clp); |
66af2579 | 202 | clp->cl_state = NFSD4_ACTIVE; |
221a6876 BF |
203 | } |
204 | ||
ba138435 | 205 | static void put_client_renew_locked(struct nfs4_client *clp) |
221a6876 | 206 | { |
0a880a28 TM |
207 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
208 | ||
209 | lockdep_assert_held(&nn->client_lock); | |
210 | ||
14ed14cc | 211 | if (!atomic_dec_and_test(&clp->cl_rpc_users)) |
221a6876 BF |
212 | return; |
213 | if (!is_client_expired(clp)) | |
214 | renew_client_locked(clp); | |
89c905be BF |
215 | else |
216 | wake_up_all(&expiry_wq); | |
221a6876 BF |
217 | } |
218 | ||
4b24ca7d JL |
219 | static void put_client_renew(struct nfs4_client *clp) |
220 | { | |
221 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
222 | ||
14ed14cc | 223 | if (!atomic_dec_and_lock(&clp->cl_rpc_users, &nn->client_lock)) |
d6c249b4 JL |
224 | return; |
225 | if (!is_client_expired(clp)) | |
226 | renew_client_locked(clp); | |
89c905be BF |
227 | else |
228 | wake_up_all(&expiry_wq); | |
4b24ca7d JL |
229 | spin_unlock(&nn->client_lock); |
230 | } | |
231 | ||
d4e19e70 TM |
232 | static __be32 nfsd4_get_session_locked(struct nfsd4_session *ses) |
233 | { | |
234 | __be32 status; | |
235 | ||
236 | if (is_session_dead(ses)) | |
237 | return nfserr_badsession; | |
238 | status = get_client_locked(ses->se_client); | |
239 | if (status) | |
240 | return status; | |
241 | atomic_inc(&ses->se_ref); | |
242 | return nfs_ok; | |
243 | } | |
244 | ||
245 | static void nfsd4_put_session_locked(struct nfsd4_session *ses) | |
246 | { | |
247 | struct nfs4_client *clp = ses->se_client; | |
0a880a28 TM |
248 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
249 | ||
250 | lockdep_assert_held(&nn->client_lock); | |
d4e19e70 TM |
251 | |
252 | if (atomic_dec_and_test(&ses->se_ref) && is_session_dead(ses)) | |
253 | free_session(ses); | |
254 | put_client_renew_locked(clp); | |
255 | } | |
256 | ||
257 | static void nfsd4_put_session(struct nfsd4_session *ses) | |
258 | { | |
259 | struct nfs4_client *clp = ses->se_client; | |
260 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
261 | ||
262 | spin_lock(&nn->client_lock); | |
263 | nfsd4_put_session_locked(ses); | |
264 | spin_unlock(&nn->client_lock); | |
265 | } | |
266 | ||
76d348fa JL |
267 | static struct nfsd4_blocked_lock * |
268 | find_blocked_lock(struct nfs4_lockowner *lo, struct knfsd_fh *fh, | |
269 | struct nfsd_net *nn) | |
270 | { | |
271 | struct nfsd4_blocked_lock *cur, *found = NULL; | |
272 | ||
0cc11a61 | 273 | spin_lock(&nn->blocked_locks_lock); |
76d348fa JL |
274 | list_for_each_entry(cur, &lo->lo_blocked, nbl_list) { |
275 | if (fh_match(fh, &cur->nbl_fh)) { | |
276 | list_del_init(&cur->nbl_list); | |
47446d74 | 277 | WARN_ON(list_empty(&cur->nbl_lru)); |
7919d0a2 | 278 | list_del_init(&cur->nbl_lru); |
76d348fa JL |
279 | found = cur; |
280 | break; | |
281 | } | |
282 | } | |
0cc11a61 | 283 | spin_unlock(&nn->blocked_locks_lock); |
76d348fa | 284 | if (found) |
cb03f94f | 285 | locks_delete_block(&found->nbl_lock); |
76d348fa JL |
286 | return found; |
287 | } | |
288 | ||
289 | static struct nfsd4_blocked_lock * | |
290 | find_or_allocate_block(struct nfs4_lockowner *lo, struct knfsd_fh *fh, | |
291 | struct nfsd_net *nn) | |
292 | { | |
293 | struct nfsd4_blocked_lock *nbl; | |
294 | ||
295 | nbl = find_blocked_lock(lo, fh, nn); | |
296 | if (!nbl) { | |
297 | nbl= kmalloc(sizeof(*nbl), GFP_KERNEL); | |
298 | if (nbl) { | |
e1e8399e VA |
299 | INIT_LIST_HEAD(&nbl->nbl_list); |
300 | INIT_LIST_HEAD(&nbl->nbl_lru); | |
76d348fa JL |
301 | fh_copy_shallow(&nbl->nbl_fh, fh); |
302 | locks_init_lock(&nbl->nbl_lock); | |
47446d74 | 303 | kref_init(&nbl->nbl_kref); |
76d348fa JL |
304 | nfsd4_init_cb(&nbl->nbl_cb, lo->lo_owner.so_client, |
305 | &nfsd4_cb_notify_lock_ops, | |
306 | NFSPROC4_CLNT_CB_NOTIFY_LOCK); | |
307 | } | |
308 | } | |
309 | return nbl; | |
310 | } | |
311 | ||
47446d74 VA |
312 | static void |
313 | free_nbl(struct kref *kref) | |
314 | { | |
315 | struct nfsd4_blocked_lock *nbl; | |
316 | ||
317 | nbl = container_of(kref, struct nfsd4_blocked_lock, nbl_kref); | |
318 | kfree(nbl); | |
319 | } | |
320 | ||
76d348fa JL |
321 | static void |
322 | free_blocked_lock(struct nfsd4_blocked_lock *nbl) | |
323 | { | |
6aaafc43 | 324 | locks_delete_block(&nbl->nbl_lock); |
76d348fa | 325 | locks_release_private(&nbl->nbl_lock); |
47446d74 | 326 | kref_put(&nbl->nbl_kref, free_nbl); |
76d348fa JL |
327 | } |
328 | ||
68ef3bc3 JL |
329 | static void |
330 | remove_blocked_locks(struct nfs4_lockowner *lo) | |
331 | { | |
332 | struct nfs4_client *clp = lo->lo_owner.so_client; | |
333 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
334 | struct nfsd4_blocked_lock *nbl; | |
335 | LIST_HEAD(reaplist); | |
336 | ||
337 | /* Dequeue all blocked locks */ | |
338 | spin_lock(&nn->blocked_locks_lock); | |
339 | while (!list_empty(&lo->lo_blocked)) { | |
340 | nbl = list_first_entry(&lo->lo_blocked, | |
341 | struct nfsd4_blocked_lock, | |
342 | nbl_list); | |
343 | list_del_init(&nbl->nbl_list); | |
47446d74 | 344 | WARN_ON(list_empty(&nbl->nbl_lru)); |
68ef3bc3 JL |
345 | list_move(&nbl->nbl_lru, &reaplist); |
346 | } | |
347 | spin_unlock(&nn->blocked_locks_lock); | |
348 | ||
349 | /* Now free them */ | |
350 | while (!list_empty(&reaplist)) { | |
351 | nbl = list_first_entry(&reaplist, struct nfsd4_blocked_lock, | |
352 | nbl_lru); | |
353 | list_del_init(&nbl->nbl_lru); | |
68ef3bc3 JL |
354 | free_blocked_lock(nbl); |
355 | } | |
356 | } | |
357 | ||
f456458e JL |
358 | static void |
359 | nfsd4_cb_notify_lock_prepare(struct nfsd4_callback *cb) | |
360 | { | |
361 | struct nfsd4_blocked_lock *nbl = container_of(cb, | |
362 | struct nfsd4_blocked_lock, nbl_cb); | |
363 | locks_delete_block(&nbl->nbl_lock); | |
364 | } | |
365 | ||
76d348fa JL |
366 | static int |
367 | nfsd4_cb_notify_lock_done(struct nfsd4_callback *cb, struct rpc_task *task) | |
368 | { | |
1035d654 CL |
369 | trace_nfsd_cb_notify_lock_done(&zero_stateid, task); |
370 | ||
76d348fa JL |
371 | /* |
372 | * Since this is just an optimization, we don't try very hard if it | |
373 | * turns out not to succeed. We'll requeue it on NFS4ERR_DELAY, and | |
374 | * just quit trying on anything else. | |
375 | */ | |
376 | switch (task->tk_status) { | |
377 | case -NFS4ERR_DELAY: | |
378 | rpc_delay(task, 1 * HZ); | |
379 | return 0; | |
380 | default: | |
381 | return 1; | |
382 | } | |
383 | } | |
384 | ||
385 | static void | |
386 | nfsd4_cb_notify_lock_release(struct nfsd4_callback *cb) | |
387 | { | |
388 | struct nfsd4_blocked_lock *nbl = container_of(cb, | |
389 | struct nfsd4_blocked_lock, nbl_cb); | |
390 | ||
391 | free_blocked_lock(nbl); | |
392 | } | |
393 | ||
394 | static const struct nfsd4_callback_ops nfsd4_cb_notify_lock_ops = { | |
f456458e | 395 | .prepare = nfsd4_cb_notify_lock_prepare, |
76d348fa JL |
396 | .done = nfsd4_cb_notify_lock_done, |
397 | .release = nfsd4_cb_notify_lock_release, | |
398 | }; | |
399 | ||
ebd9d2c2 BF |
400 | /* |
401 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
402 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
403 | * only what share bits are currently in force, but also what | |
404 | * combinations of share bits previous opens have used. This allows us | |
3dcd1d8a BF |
405 | * to enforce the recommendation in |
406 | * https://datatracker.ietf.org/doc/html/rfc7530#section-16.19.4 that | |
407 | * the server return an error if the client attempt to downgrade to a | |
408 | * combination of share bits not explicable by closing some of its | |
409 | * previous opens. | |
ebd9d2c2 | 410 | * |
3dcd1d8a | 411 | * This enforcement is arguably incomplete, since we don't keep |
ebd9d2c2 BF |
412 | * track of access/deny bit combinations; so, e.g., we allow: |
413 | * | |
414 | * OPEN allow read, deny write | |
415 | * OPEN allow both, deny none | |
416 | * DOWNGRADE allow read, deny none | |
417 | * | |
418 | * which we should reject. | |
3dcd1d8a BF |
419 | * |
420 | * But you could also argue that our current code is already overkill, | |
421 | * since it only exists to return NFS4ERR_INVAL on incorrect client | |
422 | * behavior. | |
ebd9d2c2 BF |
423 | */ |
424 | static unsigned int | |
425 | bmap_to_share_mode(unsigned long bmap) | |
426 | { | |
427 | int i; | |
428 | unsigned int access = 0; | |
429 | ||
430 | for (i = 1; i < 4; i++) { | |
431 | if (test_bit(i, &bmap)) | |
432 | access |= i; | |
433 | } | |
434 | return access; | |
435 | } | |
436 | ||
437 | /* set share access for a given stateid */ | |
438 | static inline void | |
439 | set_access(u32 access, struct nfs4_ol_stateid *stp) | |
440 | { | |
441 | unsigned char mask = 1 << access; | |
442 | ||
443 | WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH); | |
444 | stp->st_access_bmap |= mask; | |
445 | } | |
446 | ||
447 | /* clear share access for a given stateid */ | |
448 | static inline void | |
449 | clear_access(u32 access, struct nfs4_ol_stateid *stp) | |
450 | { | |
451 | unsigned char mask = 1 << access; | |
452 | ||
453 | WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH); | |
454 | stp->st_access_bmap &= ~mask; | |
455 | } | |
456 | ||
457 | /* test whether a given stateid has access */ | |
458 | static inline bool | |
459 | test_access(u32 access, struct nfs4_ol_stateid *stp) | |
460 | { | |
461 | unsigned char mask = 1 << access; | |
462 | ||
463 | return (bool)(stp->st_access_bmap & mask); | |
464 | } | |
465 | ||
466 | /* set share deny for a given stateid */ | |
467 | static inline void | |
468 | set_deny(u32 deny, struct nfs4_ol_stateid *stp) | |
469 | { | |
470 | unsigned char mask = 1 << deny; | |
471 | ||
472 | WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH); | |
473 | stp->st_deny_bmap |= mask; | |
474 | } | |
475 | ||
476 | /* clear share deny for a given stateid */ | |
477 | static inline void | |
478 | clear_deny(u32 deny, struct nfs4_ol_stateid *stp) | |
479 | { | |
480 | unsigned char mask = 1 << deny; | |
481 | ||
482 | WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH); | |
483 | stp->st_deny_bmap &= ~mask; | |
484 | } | |
485 | ||
486 | /* test whether a given stateid is denying specific access */ | |
487 | static inline bool | |
488 | test_deny(u32 deny, struct nfs4_ol_stateid *stp) | |
489 | { | |
490 | unsigned char mask = 1 << deny; | |
491 | ||
492 | return (bool)(stp->st_deny_bmap & mask); | |
493 | } | |
494 | ||
495 | static int nfs4_access_to_omode(u32 access) | |
496 | { | |
497 | switch (access & NFS4_SHARE_ACCESS_BOTH) { | |
498 | case NFS4_SHARE_ACCESS_READ: | |
499 | return O_RDONLY; | |
500 | case NFS4_SHARE_ACCESS_WRITE: | |
501 | return O_WRONLY; | |
502 | case NFS4_SHARE_ACCESS_BOTH: | |
503 | return O_RDWR; | |
504 | } | |
505 | WARN_ON_ONCE(1); | |
506 | return O_RDONLY; | |
507 | } | |
508 | ||
509 | static inline int | |
510 | access_permit_read(struct nfs4_ol_stateid *stp) | |
511 | { | |
512 | return test_access(NFS4_SHARE_ACCESS_READ, stp) || | |
513 | test_access(NFS4_SHARE_ACCESS_BOTH, stp) || | |
514 | test_access(NFS4_SHARE_ACCESS_WRITE, stp); | |
515 | } | |
516 | ||
517 | static inline int | |
518 | access_permit_write(struct nfs4_ol_stateid *stp) | |
519 | { | |
520 | return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || | |
521 | test_access(NFS4_SHARE_ACCESS_BOTH, stp); | |
522 | } | |
523 | ||
b5971afa KM |
524 | static inline struct nfs4_stateowner * |
525 | nfs4_get_stateowner(struct nfs4_stateowner *sop) | |
526 | { | |
527 | atomic_inc(&sop->so_count); | |
528 | return sop; | |
529 | } | |
530 | ||
7ffb5880 | 531 | static int |
d4f0489f | 532 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner) |
7ffb5880 TM |
533 | { |
534 | return (sop->so_owner.len == owner->len) && | |
d4f0489f | 535 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len); |
7ffb5880 TM |
536 | } |
537 | ||
538 | static struct nfs4_openowner * | |
539 | find_openstateowner_str_locked(unsigned int hashval, struct nfsd4_open *open, | |
d4f0489f | 540 | struct nfs4_client *clp) |
7ffb5880 TM |
541 | { |
542 | struct nfs4_stateowner *so; | |
7ffb5880 | 543 | |
d4f0489f | 544 | lockdep_assert_held(&clp->cl_lock); |
7ffb5880 | 545 | |
d4f0489f TM |
546 | list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[hashval], |
547 | so_strhash) { | |
7ffb5880 TM |
548 | if (!so->so_is_open_owner) |
549 | continue; | |
b5971afa KM |
550 | if (same_owner_str(so, &open->op_owner)) |
551 | return openowner(nfs4_get_stateowner(so)); | |
7ffb5880 TM |
552 | } |
553 | return NULL; | |
554 | } | |
555 | ||
556 | static struct nfs4_openowner * | |
557 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, | |
d4f0489f | 558 | struct nfs4_client *clp) |
7ffb5880 TM |
559 | { |
560 | struct nfs4_openowner *oo; | |
561 | ||
d4f0489f TM |
562 | spin_lock(&clp->cl_lock); |
563 | oo = find_openstateowner_str_locked(hashval, open, clp); | |
564 | spin_unlock(&clp->cl_lock); | |
7ffb5880 TM |
565 | return oo; |
566 | } | |
567 | ||
1da177e4 LT |
568 | static inline u32 |
569 | opaque_hashval(const void *ptr, int nbytes) | |
570 | { | |
571 | unsigned char *cptr = (unsigned char *) ptr; | |
572 | ||
573 | u32 x = 0; | |
574 | while (nbytes--) { | |
575 | x *= 37; | |
576 | x += *cptr++; | |
577 | } | |
578 | return x; | |
579 | } | |
580 | ||
5b095e99 | 581 | static void nfsd4_free_file_rcu(struct rcu_head *rcu) |
32513b40 | 582 | { |
5b095e99 JL |
583 | struct nfs4_file *fp = container_of(rcu, struct nfs4_file, fi_rcu); |
584 | ||
585 | kmem_cache_free(file_slab, fp); | |
32513b40 BF |
586 | } |
587 | ||
e6ba76e1 | 588 | void |
13cd2184 N |
589 | put_nfs4_file(struct nfs4_file *fi) |
590 | { | |
02e1215f JL |
591 | might_lock(&state_lock); |
592 | ||
818a34eb | 593 | if (refcount_dec_and_lock(&fi->fi_ref, &state_lock)) { |
5b095e99 | 594 | hlist_del_rcu(&fi->fi_hash); |
cdc97505 | 595 | spin_unlock(&state_lock); |
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 | ||
9affa435 BF |
678 | static struct nfsd_file *find_deleg_file(struct nfs4_file *f) |
679 | { | |
680 | struct nfsd_file *ret = NULL; | |
681 | ||
682 | spin_lock(&f->fi_lock); | |
683 | if (f->fi_deleg_file) | |
684 | ret = nfsd_file_get(f->fi_deleg_file); | |
685 | spin_unlock(&f->fi_lock); | |
686 | return ret; | |
687 | } | |
688 | ||
02a3508d | 689 | static atomic_long_t num_delegations; |
697ce9be | 690 | unsigned long max_delegations; |
ef0f3390 N |
691 | |
692 | /* | |
693 | * Open owner state (share locks) | |
694 | */ | |
695 | ||
16bfdaaf BF |
696 | /* hash tables for lock and open owners */ |
697 | #define OWNER_HASH_BITS 8 | |
698 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
699 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
ef0f3390 | 700 | |
d4f0489f | 701 | static unsigned int ownerstr_hashval(struct xdr_netobj *ownername) |
ddc04c41 BF |
702 | { |
703 | unsigned int ret; | |
704 | ||
705 | ret = opaque_hashval(ownername->data, ownername->len); | |
16bfdaaf | 706 | return ret & OWNER_HASH_MASK; |
ddc04c41 | 707 | } |
ef0f3390 | 708 | |
ef0f3390 N |
709 | /* hash table for nfs4_file */ |
710 | #define FILE_HASH_BITS 8 | |
711 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
35079582 | 712 | |
f9b60e22 | 713 | static unsigned int file_hashval(struct svc_fh *fh) |
ddc04c41 | 714 | { |
f9b60e22 | 715 | struct inode *inode = d_inode(fh->fh_dentry); |
ca943217 | 716 | |
f9b60e22 BF |
717 | /* XXX: why not (here & in file cache) use inode? */ |
718 | return (unsigned int)hash_long(inode->i_ino, FILE_HASH_BITS); | |
ca943217 TM |
719 | } |
720 | ||
89876f8c | 721 | static struct hlist_head file_hashtbl[FILE_HASH_SIZE]; |
ef0f3390 | 722 | |
3d694271 DN |
723 | /* |
724 | * Check if courtesy clients have conflicting access and resolve it if possible | |
725 | * | |
726 | * access: is op_share_access if share_access is true. | |
727 | * Check if access mode, op_share_access, would conflict with | |
728 | * the current deny mode of the file 'fp'. | |
729 | * access: is op_share_deny if share_access is false. | |
730 | * Check if the deny mode, op_share_deny, would conflict with | |
731 | * current access of the file 'fp'. | |
732 | * stp: skip checking this entry. | |
733 | * new_stp: normal open, not open upgrade. | |
734 | * | |
735 | * Function returns: | |
736 | * false - access/deny mode conflict with normal client. | |
737 | * true - no conflict or conflict with courtesy client(s) is resolved. | |
738 | */ | |
739 | static bool | |
740 | nfs4_resolve_deny_conflicts_locked(struct nfs4_file *fp, bool new_stp, | |
741 | struct nfs4_ol_stateid *stp, u32 access, bool share_access) | |
742 | { | |
743 | struct nfs4_ol_stateid *st; | |
744 | bool resolvable = true; | |
745 | unsigned char bmap; | |
746 | struct nfsd_net *nn; | |
747 | struct nfs4_client *clp; | |
748 | ||
749 | lockdep_assert_held(&fp->fi_lock); | |
750 | list_for_each_entry(st, &fp->fi_stateids, st_perfile) { | |
751 | /* ignore lock stateid */ | |
752 | if (st->st_openstp) | |
753 | continue; | |
754 | if (st == stp && new_stp) | |
755 | continue; | |
756 | /* check file access against deny mode or vice versa */ | |
757 | bmap = share_access ? st->st_deny_bmap : st->st_access_bmap; | |
758 | if (!(access & bmap_to_share_mode(bmap))) | |
759 | continue; | |
760 | clp = st->st_stid.sc_client; | |
761 | if (try_to_expire_client(clp)) | |
762 | continue; | |
763 | resolvable = false; | |
764 | break; | |
765 | } | |
766 | if (resolvable) { | |
767 | clp = stp->st_stid.sc_client; | |
768 | nn = net_generic(clp->net, nfsd_net_id); | |
769 | mod_delayed_work(laundry_wq, &nn->laundromat_work, 0); | |
770 | } | |
771 | return resolvable; | |
772 | } | |
773 | ||
12659651 JL |
774 | static void |
775 | __nfs4_file_get_access(struct nfs4_file *fp, u32 access) | |
3477565e | 776 | { |
7214e860 JL |
777 | lockdep_assert_held(&fp->fi_lock); |
778 | ||
12659651 JL |
779 | if (access & NFS4_SHARE_ACCESS_WRITE) |
780 | atomic_inc(&fp->fi_access[O_WRONLY]); | |
781 | if (access & NFS4_SHARE_ACCESS_READ) | |
782 | atomic_inc(&fp->fi_access[O_RDONLY]); | |
3477565e BF |
783 | } |
784 | ||
12659651 JL |
785 | static __be32 |
786 | nfs4_file_get_access(struct nfs4_file *fp, u32 access) | |
998db52c | 787 | { |
7214e860 JL |
788 | lockdep_assert_held(&fp->fi_lock); |
789 | ||
12659651 JL |
790 | /* Does this access mode make sense? */ |
791 | if (access & ~NFS4_SHARE_ACCESS_BOTH) | |
792 | return nfserr_inval; | |
793 | ||
baeb4ff0 JL |
794 | /* Does it conflict with a deny mode already set? */ |
795 | if ((access & fp->fi_share_deny) != 0) | |
796 | return nfserr_share_denied; | |
797 | ||
12659651 JL |
798 | __nfs4_file_get_access(fp, access); |
799 | return nfs_ok; | |
998db52c BF |
800 | } |
801 | ||
baeb4ff0 JL |
802 | static __be32 nfs4_file_check_deny(struct nfs4_file *fp, u32 deny) |
803 | { | |
804 | /* Common case is that there is no deny mode. */ | |
805 | if (deny) { | |
806 | /* Does this deny mode make sense? */ | |
807 | if (deny & ~NFS4_SHARE_DENY_BOTH) | |
808 | return nfserr_inval; | |
809 | ||
810 | if ((deny & NFS4_SHARE_DENY_READ) && | |
811 | atomic_read(&fp->fi_access[O_RDONLY])) | |
812 | return nfserr_share_denied; | |
813 | ||
814 | if ((deny & NFS4_SHARE_DENY_WRITE) && | |
815 | atomic_read(&fp->fi_access[O_WRONLY])) | |
816 | return nfserr_share_denied; | |
817 | } | |
818 | return nfs_ok; | |
819 | } | |
820 | ||
998db52c | 821 | static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
f9d7562f | 822 | { |
de18643d TM |
823 | might_lock(&fp->fi_lock); |
824 | ||
825 | if (atomic_dec_and_lock(&fp->fi_access[oflag], &fp->fi_lock)) { | |
fd4f83fd JL |
826 | struct nfsd_file *f1 = NULL; |
827 | struct nfsd_file *f2 = NULL; | |
de18643d | 828 | |
6d338b51 | 829 | swap(f1, fp->fi_fds[oflag]); |
0c7c3e67 | 830 | if (atomic_read(&fp->fi_access[1 - oflag]) == 0) |
6d338b51 | 831 | swap(f2, fp->fi_fds[O_RDWR]); |
de18643d TM |
832 | spin_unlock(&fp->fi_lock); |
833 | if (f1) | |
5e138c4a | 834 | nfsd_file_close(f1); |
de18643d | 835 | if (f2) |
5e138c4a | 836 | nfsd_file_close(f2); |
f9d7562f BF |
837 | } |
838 | } | |
839 | ||
12659651 | 840 | static void nfs4_file_put_access(struct nfs4_file *fp, u32 access) |
998db52c | 841 | { |
12659651 JL |
842 | WARN_ON_ONCE(access & ~NFS4_SHARE_ACCESS_BOTH); |
843 | ||
844 | if (access & NFS4_SHARE_ACCESS_WRITE) | |
998db52c | 845 | __nfs4_file_put_access(fp, O_WRONLY); |
12659651 JL |
846 | if (access & NFS4_SHARE_ACCESS_READ) |
847 | __nfs4_file_put_access(fp, O_RDONLY); | |
998db52c BF |
848 | } |
849 | ||
8287f009 SB |
850 | /* |
851 | * Allocate a new open/delegation state counter. This is needed for | |
852 | * pNFS for proper return on close semantics. | |
853 | * | |
854 | * Note that we only allocate it for pNFS-enabled exports, otherwise | |
855 | * all pointers to struct nfs4_clnt_odstate are always NULL. | |
856 | */ | |
857 | static struct nfs4_clnt_odstate * | |
858 | alloc_clnt_odstate(struct nfs4_client *clp) | |
859 | { | |
860 | struct nfs4_clnt_odstate *co; | |
861 | ||
862 | co = kmem_cache_zalloc(odstate_slab, GFP_KERNEL); | |
863 | if (co) { | |
864 | co->co_client = clp; | |
cff7cb2e | 865 | refcount_set(&co->co_odcount, 1); |
8287f009 SB |
866 | } |
867 | return co; | |
868 | } | |
869 | ||
870 | static void | |
871 | hash_clnt_odstate_locked(struct nfs4_clnt_odstate *co) | |
872 | { | |
873 | struct nfs4_file *fp = co->co_file; | |
874 | ||
875 | lockdep_assert_held(&fp->fi_lock); | |
876 | list_add(&co->co_perfile, &fp->fi_clnt_odstate); | |
877 | } | |
878 | ||
879 | static inline void | |
880 | get_clnt_odstate(struct nfs4_clnt_odstate *co) | |
881 | { | |
882 | if (co) | |
cff7cb2e | 883 | refcount_inc(&co->co_odcount); |
8287f009 SB |
884 | } |
885 | ||
886 | static void | |
887 | put_clnt_odstate(struct nfs4_clnt_odstate *co) | |
888 | { | |
889 | struct nfs4_file *fp; | |
890 | ||
891 | if (!co) | |
892 | return; | |
893 | ||
894 | fp = co->co_file; | |
cff7cb2e | 895 | if (refcount_dec_and_lock(&co->co_odcount, &fp->fi_lock)) { |
8287f009 SB |
896 | list_del(&co->co_perfile); |
897 | spin_unlock(&fp->fi_lock); | |
898 | ||
899 | nfsd4_return_all_file_layouts(co->co_client, fp); | |
900 | kmem_cache_free(odstate_slab, co); | |
901 | } | |
902 | } | |
903 | ||
904 | static struct nfs4_clnt_odstate * | |
905 | find_or_hash_clnt_odstate(struct nfs4_file *fp, struct nfs4_clnt_odstate *new) | |
906 | { | |
907 | struct nfs4_clnt_odstate *co; | |
908 | struct nfs4_client *cl; | |
909 | ||
910 | if (!new) | |
911 | return NULL; | |
912 | ||
913 | cl = new->co_client; | |
914 | ||
915 | spin_lock(&fp->fi_lock); | |
916 | list_for_each_entry(co, &fp->fi_clnt_odstate, co_perfile) { | |
917 | if (co->co_client == cl) { | |
918 | get_clnt_odstate(co); | |
919 | goto out; | |
920 | } | |
921 | } | |
922 | co = new; | |
923 | co->co_file = fp; | |
924 | hash_clnt_odstate_locked(new); | |
925 | out: | |
926 | spin_unlock(&fp->fi_lock); | |
927 | return co; | |
928 | } | |
929 | ||
d19fb70d KM |
930 | struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct kmem_cache *slab, |
931 | void (*sc_free)(struct nfs4_stid *)) | |
2a74aba7 | 932 | { |
3abdb607 | 933 | struct nfs4_stid *stid; |
6136d2b4 | 934 | int new_id; |
2a74aba7 | 935 | |
f8338834 | 936 | stid = kmem_cache_zalloc(slab, GFP_KERNEL); |
3abdb607 BF |
937 | if (!stid) |
938 | return NULL; | |
939 | ||
4770d722 JL |
940 | idr_preload(GFP_KERNEL); |
941 | spin_lock(&cl->cl_lock); | |
78599c42 BF |
942 | /* Reserving 0 for start of file in nfsdfs "states" file: */ |
943 | new_id = idr_alloc_cyclic(&cl->cl_stateids, stid, 1, 0, GFP_NOWAIT); | |
4770d722 JL |
944 | spin_unlock(&cl->cl_lock); |
945 | idr_preload_end(); | |
ebd6c707 | 946 | if (new_id < 0) |
3abdb607 | 947 | goto out_free; |
d19fb70d KM |
948 | |
949 | stid->sc_free = sc_free; | |
2a74aba7 | 950 | stid->sc_client = cl; |
3abdb607 BF |
951 | stid->sc_stateid.si_opaque.so_id = new_id; |
952 | stid->sc_stateid.si_opaque.so_clid = cl->cl_clientid; | |
2a74aba7 | 953 | /* Will be incremented before return to client: */ |
a15dfcd5 | 954 | refcount_set(&stid->sc_count, 1); |
9767feb2 | 955 | spin_lock_init(&stid->sc_lock); |
624322f1 | 956 | INIT_LIST_HEAD(&stid->sc_cp_list); |
996e0938 | 957 | |
996e0938 | 958 | /* |
3abdb607 BF |
959 | * It shouldn't be a problem to reuse an opaque stateid value. |
960 | * I don't think it is for 4.1. But with 4.0 I worry that, for | |
961 | * example, a stray write retransmission could be accepted by | |
962 | * the server when it should have been rejected. Therefore, | |
963 | * adopt a trick from the sctp code to attempt to maximize the | |
964 | * amount of time until an id is reused, by ensuring they always | |
965 | * "increase" (mod INT_MAX): | |
996e0938 | 966 | */ |
3abdb607 BF |
967 | return stid; |
968 | out_free: | |
2c44a234 | 969 | kmem_cache_free(slab, stid); |
3abdb607 | 970 | return NULL; |
2a74aba7 BF |
971 | } |
972 | ||
e0639dc5 OK |
973 | /* |
974 | * Create a unique stateid_t to represent each COPY. | |
975 | */ | |
624322f1 | 976 | static int nfs4_init_cp_state(struct nfsd_net *nn, copy_stateid_t *stid, |
781fde1a | 977 | unsigned char cs_type) |
e0639dc5 OK |
978 | { |
979 | int new_id; | |
980 | ||
781fde1a CL |
981 | stid->cs_stid.si_opaque.so_clid.cl_boot = (u32)nn->boot_time; |
982 | stid->cs_stid.si_opaque.so_clid.cl_id = nn->s2s_cp_cl_id; | |
983 | stid->cs_type = cs_type; | |
624322f1 | 984 | |
e0639dc5 OK |
985 | idr_preload(GFP_KERNEL); |
986 | spin_lock(&nn->s2s_cp_lock); | |
624322f1 | 987 | new_id = idr_alloc_cyclic(&nn->s2s_cp_stateids, stid, 0, 0, GFP_NOWAIT); |
781fde1a CL |
988 | stid->cs_stid.si_opaque.so_id = new_id; |
989 | stid->cs_stid.si_generation = 1; | |
e0639dc5 OK |
990 | spin_unlock(&nn->s2s_cp_lock); |
991 | idr_preload_end(); | |
992 | if (new_id < 0) | |
993 | return 0; | |
e0639dc5 OK |
994 | return 1; |
995 | } | |
996 | ||
624322f1 OK |
997 | int nfs4_init_copy_state(struct nfsd_net *nn, struct nfsd4_copy *copy) |
998 | { | |
999 | return nfs4_init_cp_state(nn, ©->cp_stateid, NFS4_COPY_STID); | |
1000 | } | |
1001 | ||
1002 | struct nfs4_cpntf_state *nfs4_alloc_init_cpntf_state(struct nfsd_net *nn, | |
1003 | struct nfs4_stid *p_stid) | |
1004 | { | |
1005 | struct nfs4_cpntf_state *cps; | |
1006 | ||
1007 | cps = kzalloc(sizeof(struct nfs4_cpntf_state), GFP_KERNEL); | |
1008 | if (!cps) | |
1009 | return NULL; | |
20b7d86f | 1010 | cps->cpntf_time = ktime_get_boottime_seconds(); |
781fde1a | 1011 | refcount_set(&cps->cp_stateid.cs_count, 1); |
624322f1 OK |
1012 | if (!nfs4_init_cp_state(nn, &cps->cp_stateid, NFS4_COPYNOTIFY_STID)) |
1013 | goto out_free; | |
1014 | spin_lock(&nn->s2s_cp_lock); | |
1015 | list_add(&cps->cp_list, &p_stid->sc_cp_list); | |
1016 | spin_unlock(&nn->s2s_cp_lock); | |
1017 | return cps; | |
1018 | out_free: | |
1019 | kfree(cps); | |
1020 | return NULL; | |
1021 | } | |
1022 | ||
1023 | void nfs4_free_copy_state(struct nfsd4_copy *copy) | |
e0639dc5 OK |
1024 | { |
1025 | struct nfsd_net *nn; | |
1026 | ||
781fde1a | 1027 | WARN_ON_ONCE(copy->cp_stateid.cs_type != NFS4_COPY_STID); |
e0639dc5 OK |
1028 | nn = net_generic(copy->cp_clp->net, nfsd_net_id); |
1029 | spin_lock(&nn->s2s_cp_lock); | |
624322f1 | 1030 | idr_remove(&nn->s2s_cp_stateids, |
781fde1a | 1031 | copy->cp_stateid.cs_stid.si_opaque.so_id); |
624322f1 OK |
1032 | spin_unlock(&nn->s2s_cp_lock); |
1033 | } | |
1034 | ||
1035 | static void nfs4_free_cpntf_statelist(struct net *net, struct nfs4_stid *stid) | |
1036 | { | |
1037 | struct nfs4_cpntf_state *cps; | |
1038 | struct nfsd_net *nn; | |
1039 | ||
1040 | nn = net_generic(net, nfsd_net_id); | |
1041 | spin_lock(&nn->s2s_cp_lock); | |
1042 | while (!list_empty(&stid->sc_cp_list)) { | |
1043 | cps = list_first_entry(&stid->sc_cp_list, | |
1044 | struct nfs4_cpntf_state, cp_list); | |
1045 | _free_cpntf_state_locked(nn, cps); | |
1046 | } | |
e0639dc5 OK |
1047 | spin_unlock(&nn->s2s_cp_lock); |
1048 | } | |
1049 | ||
b49e084d | 1050 | static struct nfs4_ol_stateid * nfs4_alloc_open_stateid(struct nfs4_client *clp) |
4cdc951b | 1051 | { |
6011695d | 1052 | struct nfs4_stid *stid; |
6011695d | 1053 | |
d19fb70d | 1054 | stid = nfs4_alloc_stid(clp, stateid_slab, nfs4_free_ol_stateid); |
6011695d TM |
1055 | if (!stid) |
1056 | return NULL; | |
1057 | ||
d19fb70d | 1058 | return openlockstateid(stid); |
6011695d TM |
1059 | } |
1060 | ||
1061 | static void nfs4_free_deleg(struct nfs4_stid *stid) | |
1062 | { | |
895ddf5e JL |
1063 | struct nfs4_delegation *dp = delegstateid(stid); |
1064 | ||
1065 | WARN_ON_ONCE(!list_empty(&stid->sc_cp_list)); | |
1066 | WARN_ON_ONCE(!list_empty(&dp->dl_perfile)); | |
1067 | WARN_ON_ONCE(!list_empty(&dp->dl_perclnt)); | |
1068 | WARN_ON_ONCE(!list_empty(&dp->dl_recall_lru)); | |
6011695d TM |
1069 | kmem_cache_free(deleg_slab, stid); |
1070 | atomic_long_dec(&num_delegations); | |
4cdc951b BF |
1071 | } |
1072 | ||
6282cd56 N |
1073 | /* |
1074 | * When we recall a delegation, we should be careful not to hand it | |
1075 | * out again straight away. | |
1076 | * To ensure this we keep a pair of bloom filters ('new' and 'old') | |
1077 | * in which the filehandles of recalled delegations are "stored". | |
1078 | * If a filehandle appear in either filter, a delegation is blocked. | |
1079 | * When a delegation is recalled, the filehandle is stored in the "new" | |
1080 | * filter. | |
1081 | * Every 30 seconds we swap the filters and clear the "new" one, | |
1082 | * unless both are empty of course. | |
1083 | * | |
1084 | * Each filter is 256 bits. We hash the filehandle to 32bit and use the | |
1085 | * low 3 bytes as hash-table indices. | |
1086 | * | |
f54fe962 | 1087 | * 'blocked_delegations_lock', which is always taken in block_delegations(), |
6282cd56 N |
1088 | * is used to manage concurrent access. Testing does not need the lock |
1089 | * except when swapping the two filters. | |
1090 | */ | |
f54fe962 | 1091 | static DEFINE_SPINLOCK(blocked_delegations_lock); |
6282cd56 N |
1092 | static struct bloom_pair { |
1093 | int entries, old_entries; | |
b3f255ef | 1094 | time64_t swap_time; |
6282cd56 N |
1095 | int new; /* index into 'set' */ |
1096 | DECLARE_BITMAP(set[2], 256); | |
1097 | } blocked_delegations; | |
1098 | ||
1099 | static int delegation_blocked(struct knfsd_fh *fh) | |
1100 | { | |
1101 | u32 hash; | |
1102 | struct bloom_pair *bd = &blocked_delegations; | |
1103 | ||
1104 | if (bd->entries == 0) | |
1105 | return 0; | |
b3f255ef | 1106 | if (ktime_get_seconds() - bd->swap_time > 30) { |
f54fe962 | 1107 | spin_lock(&blocked_delegations_lock); |
b3f255ef | 1108 | if (ktime_get_seconds() - bd->swap_time > 30) { |
6282cd56 N |
1109 | bd->entries -= bd->old_entries; |
1110 | bd->old_entries = bd->entries; | |
1111 | memset(bd->set[bd->new], 0, | |
1112 | sizeof(bd->set[0])); | |
1113 | bd->new = 1-bd->new; | |
b3f255ef | 1114 | bd->swap_time = ktime_get_seconds(); |
6282cd56 | 1115 | } |
f54fe962 | 1116 | spin_unlock(&blocked_delegations_lock); |
6282cd56 | 1117 | } |
d8b26071 | 1118 | hash = jhash(&fh->fh_raw, fh->fh_size, 0); |
6282cd56 N |
1119 | if (test_bit(hash&255, bd->set[0]) && |
1120 | test_bit((hash>>8)&255, bd->set[0]) && | |
1121 | test_bit((hash>>16)&255, bd->set[0])) | |
1122 | return 1; | |
1123 | ||
1124 | if (test_bit(hash&255, bd->set[1]) && | |
1125 | test_bit((hash>>8)&255, bd->set[1]) && | |
1126 | test_bit((hash>>16)&255, bd->set[1])) | |
1127 | return 1; | |
1128 | ||
1129 | return 0; | |
1130 | } | |
1131 | ||
1132 | static void block_delegations(struct knfsd_fh *fh) | |
1133 | { | |
1134 | u32 hash; | |
1135 | struct bloom_pair *bd = &blocked_delegations; | |
1136 | ||
d8b26071 | 1137 | hash = jhash(&fh->fh_raw, fh->fh_size, 0); |
6282cd56 | 1138 | |
f54fe962 | 1139 | spin_lock(&blocked_delegations_lock); |
6282cd56 N |
1140 | __set_bit(hash&255, bd->set[bd->new]); |
1141 | __set_bit((hash>>8)&255, bd->set[bd->new]); | |
1142 | __set_bit((hash>>16)&255, bd->set[bd->new]); | |
1143 | if (bd->entries == 0) | |
b3f255ef | 1144 | bd->swap_time = ktime_get_seconds(); |
6282cd56 | 1145 | bd->entries += 1; |
f54fe962 | 1146 | spin_unlock(&blocked_delegations_lock); |
6282cd56 N |
1147 | } |
1148 | ||
1da177e4 | 1149 | static struct nfs4_delegation * |
86d29b10 | 1150 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_file *fp, |
8287f009 | 1151 | struct nfs4_clnt_odstate *odstate) |
1da177e4 LT |
1152 | { |
1153 | struct nfs4_delegation *dp; | |
02a3508d | 1154 | long n; |
1da177e4 LT |
1155 | |
1156 | dprintk("NFSD alloc_init_deleg\n"); | |
02a3508d TM |
1157 | n = atomic_long_inc_return(&num_delegations); |
1158 | if (n < 0 || n > max_delegations) | |
1159 | goto out_dec; | |
bbf936ed | 1160 | if (delegation_blocked(&fp->fi_fhandle)) |
02a3508d | 1161 | goto out_dec; |
d19fb70d | 1162 | dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab, nfs4_free_deleg)); |
5b2d21c1 | 1163 | if (dp == NULL) |
02a3508d | 1164 | goto out_dec; |
6011695d | 1165 | |
2a74aba7 BF |
1166 | /* |
1167 | * delegation seqid's are never incremented. The 4.1 special | |
6136d2b4 BF |
1168 | * meaning of seqid 0 isn't meaningful, really, but let's avoid |
1169 | * 0 anyway just for consistency and use 1: | |
2a74aba7 BF |
1170 | */ |
1171 | dp->dl_stid.sc_stateid.si_generation = 1; | |
ea1da636 N |
1172 | INIT_LIST_HEAD(&dp->dl_perfile); |
1173 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 | 1174 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
8287f009 SB |
1175 | dp->dl_clnt_odstate = odstate; |
1176 | get_clnt_odstate(odstate); | |
99c41515 | 1177 | dp->dl_type = NFS4_OPEN_DELEGATE_READ; |
f0b5de1b | 1178 | dp->dl_retries = 1; |
66af2579 | 1179 | dp->dl_recalled = false; |
f0b5de1b | 1180 | nfsd4_init_cb(&dp->dl_recall, dp->dl_stid.sc_client, |
0162ac2b | 1181 | &nfsd4_cb_recall_ops, NFSPROC4_CLNT_CB_RECALL); |
86d29b10 BF |
1182 | get_nfs4_file(fp); |
1183 | dp->dl_stid.sc_file = fp; | |
1da177e4 | 1184 | return dp; |
02a3508d TM |
1185 | out_dec: |
1186 | atomic_long_dec(&num_delegations); | |
1187 | return NULL; | |
1da177e4 LT |
1188 | } |
1189 | ||
1190 | void | |
6011695d | 1191 | nfs4_put_stid(struct nfs4_stid *s) |
1da177e4 | 1192 | { |
11b9164a | 1193 | struct nfs4_file *fp = s->sc_file; |
6011695d TM |
1194 | struct nfs4_client *clp = s->sc_client; |
1195 | ||
4770d722 JL |
1196 | might_lock(&clp->cl_lock); |
1197 | ||
a15dfcd5 | 1198 | if (!refcount_dec_and_lock(&s->sc_count, &clp->cl_lock)) { |
b401be22 | 1199 | wake_up_all(&close_wq); |
6011695d | 1200 | return; |
b401be22 | 1201 | } |
6011695d | 1202 | idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id); |
624322f1 | 1203 | nfs4_free_cpntf_statelist(clp->net, s); |
4770d722 | 1204 | spin_unlock(&clp->cl_lock); |
6011695d | 1205 | s->sc_free(s); |
11b9164a TM |
1206 | if (fp) |
1207 | put_nfs4_file(fp); | |
1da177e4 LT |
1208 | } |
1209 | ||
9767feb2 JL |
1210 | void |
1211 | nfs4_inc_and_copy_stateid(stateid_t *dst, struct nfs4_stid *stid) | |
1212 | { | |
1213 | stateid_t *src = &stid->sc_stateid; | |
1214 | ||
1215 | spin_lock(&stid->sc_lock); | |
1216 | if (unlikely(++src->si_generation == 0)) | |
1217 | src->si_generation = 1; | |
1218 | memcpy(dst, src, sizeof(*dst)); | |
1219 | spin_unlock(&stid->sc_lock); | |
1220 | } | |
1221 | ||
353601e7 | 1222 | static void put_deleg_file(struct nfs4_file *fp) |
1da177e4 | 1223 | { |
eb82dd39 | 1224 | struct nfsd_file *nf = NULL; |
b8232d33 | 1225 | |
6bcc034e | 1226 | spin_lock(&fp->fi_lock); |
353601e7 | 1227 | if (--fp->fi_delegees == 0) |
eb82dd39 | 1228 | swap(nf, fp->fi_deleg_file); |
6bcc034e JL |
1229 | spin_unlock(&fp->fi_lock); |
1230 | ||
eb82dd39 JL |
1231 | if (nf) |
1232 | nfsd_file_put(nf); | |
353601e7 BF |
1233 | } |
1234 | ||
1235 | static void nfs4_unlock_deleg_lease(struct nfs4_delegation *dp) | |
1236 | { | |
1237 | struct nfs4_file *fp = dp->dl_stid.sc_file; | |
eb82dd39 | 1238 | struct nfsd_file *nf = fp->fi_deleg_file; |
353601e7 BF |
1239 | |
1240 | WARN_ON_ONCE(!fp->fi_delegees); | |
1241 | ||
eb82dd39 | 1242 | vfs_setlease(nf->nf_file, F_UNLCK, NULL, (void **)&dp); |
353601e7 | 1243 | put_deleg_file(fp); |
1da177e4 LT |
1244 | } |
1245 | ||
0af6e690 BF |
1246 | static void destroy_unhashed_deleg(struct nfs4_delegation *dp) |
1247 | { | |
1248 | put_clnt_odstate(dp->dl_clnt_odstate); | |
353601e7 | 1249 | nfs4_unlock_deleg_lease(dp); |
0af6e690 BF |
1250 | nfs4_put_stid(&dp->dl_stid); |
1251 | } | |
1252 | ||
cd61c522 | 1253 | void nfs4_unhash_stid(struct nfs4_stid *s) |
6136d2b4 | 1254 | { |
3abdb607 | 1255 | s->sc_type = 0; |
6136d2b4 BF |
1256 | } |
1257 | ||
34ed9872 | 1258 | /** |
68b18f52 | 1259 | * nfs4_delegation_exists - Discover if this delegation already exists |
34ed9872 AE |
1260 | * @clp: a pointer to the nfs4_client we're granting a delegation to |
1261 | * @fp: a pointer to the nfs4_file we're granting a delegation on | |
1262 | * | |
1263 | * Return: | |
68b18f52 | 1264 | * On success: true iff an existing delegation is found |
34ed9872 AE |
1265 | */ |
1266 | ||
68b18f52 BF |
1267 | static bool |
1268 | nfs4_delegation_exists(struct nfs4_client *clp, struct nfs4_file *fp) | |
34ed9872 AE |
1269 | { |
1270 | struct nfs4_delegation *searchdp = NULL; | |
1271 | struct nfs4_client *searchclp = NULL; | |
1272 | ||
1273 | lockdep_assert_held(&state_lock); | |
1274 | lockdep_assert_held(&fp->fi_lock); | |
1275 | ||
1276 | list_for_each_entry(searchdp, &fp->fi_delegations, dl_perfile) { | |
1277 | searchclp = searchdp->dl_stid.sc_client; | |
1278 | if (clp == searchclp) { | |
51d87bc2 | 1279 | return true; |
34ed9872 AE |
1280 | } |
1281 | } | |
51d87bc2 | 1282 | return false; |
34ed9872 AE |
1283 | } |
1284 | ||
1285 | /** | |
1286 | * hash_delegation_locked - Add a delegation to the appropriate lists | |
1287 | * @dp: a pointer to the nfs4_delegation we are adding. | |
1288 | * @fp: a pointer to the nfs4_file we're granting a delegation on | |
1289 | * | |
1290 | * Return: | |
1291 | * On success: NULL if the delegation was successfully hashed. | |
1292 | * | |
1293 | * On error: -EAGAIN if one was previously granted to this | |
1294 | * nfs4_client for this nfs4_file. Delegation is not hashed. | |
1295 | * | |
1296 | */ | |
1297 | ||
1298 | static int | |
931ee56c BH |
1299 | hash_delegation_locked(struct nfs4_delegation *dp, struct nfs4_file *fp) |
1300 | { | |
34ed9872 AE |
1301 | struct nfs4_client *clp = dp->dl_stid.sc_client; |
1302 | ||
cdc97505 | 1303 | lockdep_assert_held(&state_lock); |
417c6629 | 1304 | lockdep_assert_held(&fp->fi_lock); |
931ee56c | 1305 | |
68b18f52 BF |
1306 | if (nfs4_delegation_exists(clp, fp)) |
1307 | return -EAGAIN; | |
a15dfcd5 | 1308 | refcount_inc(&dp->dl_stid.sc_count); |
3fb87d13 | 1309 | dp->dl_stid.sc_type = NFS4_DELEG_STID; |
931ee56c | 1310 | list_add(&dp->dl_perfile, &fp->fi_delegations); |
34ed9872 AE |
1311 | list_add(&dp->dl_perclnt, &clp->cl_delegations); |
1312 | return 0; | |
931ee56c BH |
1313 | } |
1314 | ||
548ec080 BF |
1315 | static bool delegation_hashed(struct nfs4_delegation *dp) |
1316 | { | |
1317 | return !(list_empty(&dp->dl_perfile)); | |
1318 | } | |
1319 | ||
3fcbbd24 | 1320 | static bool |
42690676 | 1321 | unhash_delegation_locked(struct nfs4_delegation *dp) |
1da177e4 | 1322 | { |
11b9164a | 1323 | struct nfs4_file *fp = dp->dl_stid.sc_file; |
02e1215f | 1324 | |
42690676 JL |
1325 | lockdep_assert_held(&state_lock); |
1326 | ||
548ec080 | 1327 | if (!delegation_hashed(dp)) |
3fcbbd24 JL |
1328 | return false; |
1329 | ||
b0fc29d6 | 1330 | dp->dl_stid.sc_type = NFS4_CLOSED_DELEG_STID; |
d55a166c JL |
1331 | /* Ensure that deleg break won't try to requeue it */ |
1332 | ++dp->dl_time; | |
417c6629 | 1333 | spin_lock(&fp->fi_lock); |
931ee56c | 1334 | list_del_init(&dp->dl_perclnt); |
1da177e4 | 1335 | list_del_init(&dp->dl_recall_lru); |
02e1215f JL |
1336 | list_del_init(&dp->dl_perfile); |
1337 | spin_unlock(&fp->fi_lock); | |
3fcbbd24 | 1338 | return true; |
3bd64a5b BF |
1339 | } |
1340 | ||
3bd64a5b BF |
1341 | static void destroy_delegation(struct nfs4_delegation *dp) |
1342 | { | |
3fcbbd24 JL |
1343 | bool unhashed; |
1344 | ||
42690676 | 1345 | spin_lock(&state_lock); |
3fcbbd24 | 1346 | unhashed = unhash_delegation_locked(dp); |
42690676 | 1347 | spin_unlock(&state_lock); |
0af6e690 BF |
1348 | if (unhashed) |
1349 | destroy_unhashed_deleg(dp); | |
3bd64a5b BF |
1350 | } |
1351 | ||
1352 | static void revoke_delegation(struct nfs4_delegation *dp) | |
1353 | { | |
1354 | struct nfs4_client *clp = dp->dl_stid.sc_client; | |
1355 | ||
2d4a532d JL |
1356 | WARN_ON(!list_empty(&dp->dl_recall_lru)); |
1357 | ||
0af6e690 | 1358 | if (clp->cl_minorversion) { |
3bd64a5b | 1359 | dp->dl_stid.sc_type = NFS4_REVOKED_DELEG_STID; |
0af6e690 | 1360 | refcount_inc(&dp->dl_stid.sc_count); |
2d4a532d JL |
1361 | spin_lock(&clp->cl_lock); |
1362 | list_add(&dp->dl_recall_lru, &clp->cl_revoked); | |
1363 | spin_unlock(&clp->cl_lock); | |
3bd64a5b | 1364 | } |
0af6e690 | 1365 | destroy_unhashed_deleg(dp); |
3bd64a5b BF |
1366 | } |
1367 | ||
1da177e4 LT |
1368 | /* |
1369 | * SETCLIENTID state | |
1370 | */ | |
1371 | ||
ddc04c41 BF |
1372 | static unsigned int clientid_hashval(u32 id) |
1373 | { | |
1374 | return id & CLIENT_HASH_MASK; | |
1375 | } | |
1376 | ||
6b189105 | 1377 | static unsigned int clientstr_hashval(struct xdr_netobj name) |
ddc04c41 | 1378 | { |
6b189105 | 1379 | return opaque_hashval(name.data, 8) & CLIENT_HASH_MASK; |
ddc04c41 BF |
1380 | } |
1381 | ||
baeb4ff0 JL |
1382 | /* |
1383 | * A stateid that had a deny mode associated with it is being released | |
1384 | * or downgraded. Recalculate the deny mode on the file. | |
1385 | */ | |
1386 | static void | |
1387 | recalculate_deny_mode(struct nfs4_file *fp) | |
1388 | { | |
1389 | struct nfs4_ol_stateid *stp; | |
1390 | ||
1391 | spin_lock(&fp->fi_lock); | |
1392 | fp->fi_share_deny = 0; | |
1393 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) | |
1394 | fp->fi_share_deny |= bmap_to_share_mode(stp->st_deny_bmap); | |
1395 | spin_unlock(&fp->fi_lock); | |
1396 | } | |
1397 | ||
1398 | static void | |
1399 | reset_union_bmap_deny(u32 deny, struct nfs4_ol_stateid *stp) | |
1400 | { | |
1401 | int i; | |
1402 | bool change = false; | |
1403 | ||
1404 | for (i = 1; i < 4; i++) { | |
1405 | if ((i & deny) != i) { | |
1406 | change = true; | |
1407 | clear_deny(i, stp); | |
1408 | } | |
1409 | } | |
1410 | ||
1411 | /* Recalculate per-file deny mode if there was a change */ | |
1412 | if (change) | |
11b9164a | 1413 | recalculate_deny_mode(stp->st_stid.sc_file); |
baeb4ff0 JL |
1414 | } |
1415 | ||
82c5ff1b JL |
1416 | /* release all access and file references for a given stateid */ |
1417 | static void | |
1418 | release_all_access(struct nfs4_ol_stateid *stp) | |
1419 | { | |
1420 | int i; | |
11b9164a | 1421 | struct nfs4_file *fp = stp->st_stid.sc_file; |
baeb4ff0 JL |
1422 | |
1423 | if (fp && stp->st_deny_bmap != 0) | |
1424 | recalculate_deny_mode(fp); | |
82c5ff1b JL |
1425 | |
1426 | for (i = 1; i < 4; i++) { | |
1427 | if (test_access(i, stp)) | |
11b9164a | 1428 | nfs4_file_put_access(stp->st_stid.sc_file, i); |
82c5ff1b JL |
1429 | clear_access(i, stp); |
1430 | } | |
1431 | } | |
1432 | ||
d50ffded KM |
1433 | static inline void nfs4_free_stateowner(struct nfs4_stateowner *sop) |
1434 | { | |
1435 | kfree(sop->so_owner.data); | |
1436 | sop->so_ops->so_free(sop); | |
1437 | } | |
1438 | ||
6b180f0b JL |
1439 | static void nfs4_put_stateowner(struct nfs4_stateowner *sop) |
1440 | { | |
a819ecc1 JL |
1441 | struct nfs4_client *clp = sop->so_client; |
1442 | ||
1443 | might_lock(&clp->cl_lock); | |
1444 | ||
1445 | if (!atomic_dec_and_lock(&sop->so_count, &clp->cl_lock)) | |
6b180f0b | 1446 | return; |
8f4b54c5 | 1447 | sop->so_ops->so_unhash(sop); |
a819ecc1 | 1448 | spin_unlock(&clp->cl_lock); |
d50ffded | 1449 | nfs4_free_stateowner(sop); |
6b180f0b JL |
1450 | } |
1451 | ||
a451b123 TM |
1452 | static bool |
1453 | nfs4_ol_stateid_unhashed(const struct nfs4_ol_stateid *stp) | |
1454 | { | |
1455 | return list_empty(&stp->st_perfile); | |
1456 | } | |
1457 | ||
e8568739 | 1458 | static bool unhash_ol_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 1459 | { |
11b9164a | 1460 | struct nfs4_file *fp = stp->st_stid.sc_file; |
1d31a253 | 1461 | |
1c755dc1 JL |
1462 | lockdep_assert_held(&stp->st_stateowner->so_client->cl_lock); |
1463 | ||
e8568739 JL |
1464 | if (list_empty(&stp->st_perfile)) |
1465 | return false; | |
1466 | ||
1d31a253 | 1467 | spin_lock(&fp->fi_lock); |
e8568739 | 1468 | list_del_init(&stp->st_perfile); |
1d31a253 | 1469 | spin_unlock(&fp->fi_lock); |
529d7b2a | 1470 | list_del(&stp->st_perstateowner); |
e8568739 | 1471 | return true; |
529d7b2a BF |
1472 | } |
1473 | ||
6011695d | 1474 | static void nfs4_free_ol_stateid(struct nfs4_stid *stid) |
529d7b2a | 1475 | { |
6011695d | 1476 | struct nfs4_ol_stateid *stp = openlockstateid(stid); |
4665e2ba | 1477 | |
8287f009 | 1478 | put_clnt_odstate(stp->st_clnt_odstate); |
6011695d | 1479 | release_all_access(stp); |
d3134b10 JL |
1480 | if (stp->st_stateowner) |
1481 | nfs4_put_stateowner(stp->st_stateowner); | |
019805fe | 1482 | WARN_ON(!list_empty(&stid->sc_cp_list)); |
6011695d | 1483 | kmem_cache_free(stateid_slab, stid); |
529d7b2a BF |
1484 | } |
1485 | ||
b49e084d | 1486 | static void nfs4_free_lock_stateid(struct nfs4_stid *stid) |
529d7b2a | 1487 | { |
b49e084d JL |
1488 | struct nfs4_ol_stateid *stp = openlockstateid(stid); |
1489 | struct nfs4_lockowner *lo = lockowner(stp->st_stateowner); | |
eb82dd39 | 1490 | struct nfsd_file *nf; |
529d7b2a | 1491 | |
eb82dd39 JL |
1492 | nf = find_any_file(stp->st_stid.sc_file); |
1493 | if (nf) { | |
1494 | get_file(nf->nf_file); | |
1495 | filp_close(nf->nf_file, (fl_owner_t)lo); | |
1496 | nfsd_file_put(nf); | |
1497 | } | |
b49e084d JL |
1498 | nfs4_free_ol_stateid(stid); |
1499 | } | |
1500 | ||
2c41beb0 JL |
1501 | /* |
1502 | * Put the persistent reference to an already unhashed generic stateid, while | |
1503 | * holding the cl_lock. If it's the last reference, then put it onto the | |
1504 | * reaplist for later destruction. | |
1505 | */ | |
1506 | static void put_ol_stateid_locked(struct nfs4_ol_stateid *stp, | |
1507 | struct list_head *reaplist) | |
1508 | { | |
1509 | struct nfs4_stid *s = &stp->st_stid; | |
1510 | struct nfs4_client *clp = s->sc_client; | |
1511 | ||
1512 | lockdep_assert_held(&clp->cl_lock); | |
1513 | ||
1514 | WARN_ON_ONCE(!list_empty(&stp->st_locks)); | |
1515 | ||
a15dfcd5 | 1516 | if (!refcount_dec_and_test(&s->sc_count)) { |
2c41beb0 JL |
1517 | wake_up_all(&close_wq); |
1518 | return; | |
1519 | } | |
1520 | ||
1521 | idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id); | |
1522 | list_add(&stp->st_locks, reaplist); | |
1523 | } | |
1524 | ||
e8568739 | 1525 | static bool unhash_lock_stateid(struct nfs4_ol_stateid *stp) |
b49e084d | 1526 | { |
f46c445b | 1527 | lockdep_assert_held(&stp->st_stid.sc_client->cl_lock); |
3c1c995c | 1528 | |
a451b123 TM |
1529 | if (!unhash_ol_stateid(stp)) |
1530 | return false; | |
3c1c995c | 1531 | list_del_init(&stp->st_locks); |
cd61c522 | 1532 | nfs4_unhash_stid(&stp->st_stid); |
a451b123 | 1533 | return true; |
3c1c995c JL |
1534 | } |
1535 | ||
1536 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) | |
1537 | { | |
f46c445b | 1538 | struct nfs4_client *clp = stp->st_stid.sc_client; |
e8568739 | 1539 | bool unhashed; |
3c1c995c | 1540 | |
f46c445b | 1541 | spin_lock(&clp->cl_lock); |
e8568739 | 1542 | unhashed = unhash_lock_stateid(stp); |
f46c445b | 1543 | spin_unlock(&clp->cl_lock); |
e8568739 JL |
1544 | if (unhashed) |
1545 | nfs4_put_stid(&stp->st_stid); | |
529d7b2a BF |
1546 | } |
1547 | ||
c58c6610 | 1548 | static void unhash_lockowner_locked(struct nfs4_lockowner *lo) |
8f4b54c5 | 1549 | { |
d4f0489f | 1550 | struct nfs4_client *clp = lo->lo_owner.so_client; |
c58c6610 | 1551 | |
d4f0489f | 1552 | lockdep_assert_held(&clp->cl_lock); |
c58c6610 | 1553 | |
8f4b54c5 JL |
1554 | list_del_init(&lo->lo_owner.so_strhash); |
1555 | } | |
1556 | ||
2c41beb0 JL |
1557 | /* |
1558 | * Free a list of generic stateids that were collected earlier after being | |
1559 | * fully unhashed. | |
1560 | */ | |
1561 | static void | |
1562 | free_ol_stateid_reaplist(struct list_head *reaplist) | |
1563 | { | |
1564 | struct nfs4_ol_stateid *stp; | |
fb94d766 | 1565 | struct nfs4_file *fp; |
2c41beb0 JL |
1566 | |
1567 | might_sleep(); | |
1568 | ||
1569 | while (!list_empty(reaplist)) { | |
1570 | stp = list_first_entry(reaplist, struct nfs4_ol_stateid, | |
1571 | st_locks); | |
1572 | list_del(&stp->st_locks); | |
fb94d766 | 1573 | fp = stp->st_stid.sc_file; |
2c41beb0 | 1574 | stp->st_stid.sc_free(&stp->st_stid); |
fb94d766 KM |
1575 | if (fp) |
1576 | put_nfs4_file(fp); | |
2c41beb0 JL |
1577 | } |
1578 | } | |
1579 | ||
d83017f9 JL |
1580 | static void release_open_stateid_locks(struct nfs4_ol_stateid *open_stp, |
1581 | struct list_head *reaplist) | |
3c87b9b7 TM |
1582 | { |
1583 | struct nfs4_ol_stateid *stp; | |
1584 | ||
e8568739 JL |
1585 | lockdep_assert_held(&open_stp->st_stid.sc_client->cl_lock); |
1586 | ||
3c87b9b7 TM |
1587 | while (!list_empty(&open_stp->st_locks)) { |
1588 | stp = list_entry(open_stp->st_locks.next, | |
1589 | struct nfs4_ol_stateid, st_locks); | |
e8568739 | 1590 | WARN_ON(!unhash_lock_stateid(stp)); |
d83017f9 | 1591 | put_ol_stateid_locked(stp, reaplist); |
529d7b2a BF |
1592 | } |
1593 | } | |
1594 | ||
e8568739 | 1595 | static bool unhash_open_stateid(struct nfs4_ol_stateid *stp, |
d83017f9 | 1596 | struct list_head *reaplist) |
2283963f | 1597 | { |
2c41beb0 JL |
1598 | lockdep_assert_held(&stp->st_stid.sc_client->cl_lock); |
1599 | ||
a451b123 TM |
1600 | if (!unhash_ol_stateid(stp)) |
1601 | return false; | |
d83017f9 | 1602 | release_open_stateid_locks(stp, reaplist); |
a451b123 | 1603 | return true; |
38c387b5 BF |
1604 | } |
1605 | ||
1606 | static void release_open_stateid(struct nfs4_ol_stateid *stp) | |
1607 | { | |
2c41beb0 JL |
1608 | LIST_HEAD(reaplist); |
1609 | ||
1610 | spin_lock(&stp->st_stid.sc_client->cl_lock); | |
e8568739 JL |
1611 | if (unhash_open_stateid(stp, &reaplist)) |
1612 | put_ol_stateid_locked(stp, &reaplist); | |
2c41beb0 JL |
1613 | spin_unlock(&stp->st_stid.sc_client->cl_lock); |
1614 | free_ol_stateid_reaplist(&reaplist); | |
2283963f BF |
1615 | } |
1616 | ||
7ffb5880 | 1617 | static void unhash_openowner_locked(struct nfs4_openowner *oo) |
f1d110ca | 1618 | { |
d4f0489f | 1619 | struct nfs4_client *clp = oo->oo_owner.so_client; |
7ffb5880 | 1620 | |
d4f0489f | 1621 | lockdep_assert_held(&clp->cl_lock); |
7ffb5880 | 1622 | |
8f4b54c5 JL |
1623 | list_del_init(&oo->oo_owner.so_strhash); |
1624 | list_del_init(&oo->oo_perclient); | |
f1d110ca BF |
1625 | } |
1626 | ||
f7a4d872 BF |
1627 | static void release_last_closed_stateid(struct nfs4_openowner *oo) |
1628 | { | |
217526e7 JL |
1629 | struct nfsd_net *nn = net_generic(oo->oo_owner.so_client->net, |
1630 | nfsd_net_id); | |
1631 | struct nfs4_ol_stateid *s; | |
f7a4d872 | 1632 | |
217526e7 JL |
1633 | spin_lock(&nn->client_lock); |
1634 | s = oo->oo_last_closed_stid; | |
f7a4d872 | 1635 | if (s) { |
d3134b10 | 1636 | list_del_init(&oo->oo_close_lru); |
f7a4d872 BF |
1637 | oo->oo_last_closed_stid = NULL; |
1638 | } | |
217526e7 JL |
1639 | spin_unlock(&nn->client_lock); |
1640 | if (s) | |
1641 | nfs4_put_stid(&s->st_stid); | |
f7a4d872 BF |
1642 | } |
1643 | ||
2c41beb0 | 1644 | static void release_openowner(struct nfs4_openowner *oo) |
8f4b54c5 JL |
1645 | { |
1646 | struct nfs4_ol_stateid *stp; | |
d4f0489f | 1647 | struct nfs4_client *clp = oo->oo_owner.so_client; |
2c41beb0 | 1648 | struct list_head reaplist; |
7ffb5880 | 1649 | |
2c41beb0 | 1650 | INIT_LIST_HEAD(&reaplist); |
8f4b54c5 | 1651 | |
2c41beb0 JL |
1652 | spin_lock(&clp->cl_lock); |
1653 | unhash_openowner_locked(oo); | |
8f4b54c5 JL |
1654 | while (!list_empty(&oo->oo_owner.so_stateids)) { |
1655 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
1656 | struct nfs4_ol_stateid, st_perstateowner); | |
e8568739 JL |
1657 | if (unhash_open_stateid(stp, &reaplist)) |
1658 | put_ol_stateid_locked(stp, &reaplist); | |
8f4b54c5 | 1659 | } |
d4f0489f | 1660 | spin_unlock(&clp->cl_lock); |
2c41beb0 | 1661 | free_ol_stateid_reaplist(&reaplist); |
f7a4d872 | 1662 | release_last_closed_stateid(oo); |
6b180f0b | 1663 | nfs4_put_stateowner(&oo->oo_owner); |
f1d110ca BF |
1664 | } |
1665 | ||
5282fd72 ME |
1666 | static inline int |
1667 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
1668 | { | |
1669 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
1670 | ||
1671 | return sid->sequence % SESSION_HASH_SIZE; | |
1672 | } | |
1673 | ||
135dd002 | 1674 | #ifdef CONFIG_SUNRPC_DEBUG |
5282fd72 ME |
1675 | static inline void |
1676 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
1677 | { | |
1678 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
1679 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
1680 | } | |
8f199b82 TM |
1681 | #else |
1682 | static inline void | |
1683 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
1684 | { | |
1685 | } | |
1686 | #endif | |
1687 | ||
9411b1d4 BF |
1688 | /* |
1689 | * Bump the seqid on cstate->replay_owner, and clear replay_owner if it | |
1690 | * won't be used for replay. | |
1691 | */ | |
1692 | void nfsd4_bump_seqid(struct nfsd4_compound_state *cstate, __be32 nfserr) | |
1693 | { | |
1694 | struct nfs4_stateowner *so = cstate->replay_owner; | |
1695 | ||
1696 | if (nfserr == nfserr_replay_me) | |
1697 | return; | |
1698 | ||
1699 | if (!seqid_mutating_err(ntohl(nfserr))) { | |
58fb12e6 | 1700 | nfsd4_cstate_clear_replay(cstate); |
9411b1d4 BF |
1701 | return; |
1702 | } | |
1703 | if (!so) | |
1704 | return; | |
1705 | if (so->so_is_open_owner) | |
1706 | release_last_closed_stateid(openowner(so)); | |
1707 | so->so_seqid++; | |
1708 | return; | |
1709 | } | |
5282fd72 | 1710 | |
ec6b5d7b AA |
1711 | static void |
1712 | gen_sessionid(struct nfsd4_session *ses) | |
1713 | { | |
1714 | struct nfs4_client *clp = ses->se_client; | |
1715 | struct nfsd4_sessionid *sid; | |
1716 | ||
1717 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
1718 | sid->clientid = clp->cl_clientid; | |
1719 | sid->sequence = current_sessionid++; | |
1720 | sid->reserved = 0; | |
1721 | } | |
1722 | ||
1723 | /* | |
a649637c AA |
1724 | * The protocol defines ca_maxresponssize_cached to include the size of |
1725 | * the rpc header, but all we need to cache is the data starting after | |
1726 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
1727 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
1728 | * value that is the number of bytes in our cache plus a few additional | |
1729 | * bytes. In order to stay on the safe side, and not promise more than | |
1730 | * we can cache, those additional bytes must be the minimum possible: 24 | |
1731 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
1732 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
1733 | * for the SEQUENCE op response: | |
1734 | */ | |
1735 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
1736 | ||
557ce264 AA |
1737 | static void |
1738 | free_session_slots(struct nfsd4_session *ses) | |
1739 | { | |
1740 | int i; | |
1741 | ||
53da6a53 BF |
1742 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) { |
1743 | free_svc_cred(&ses->se_slots[i]->sl_cred); | |
557ce264 | 1744 | kfree(ses->se_slots[i]); |
53da6a53 | 1745 | } |
557ce264 AA |
1746 | } |
1747 | ||
a649637c | 1748 | /* |
efe0cb6d BF |
1749 | * We don't actually need to cache the rpc and session headers, so we |
1750 | * can allocate a little less for each slot: | |
1751 | */ | |
55c760cf | 1752 | static inline u32 slot_bytes(struct nfsd4_channel_attrs *ca) |
efe0cb6d | 1753 | { |
55c760cf | 1754 | u32 size; |
efe0cb6d | 1755 | |
55c760cf BF |
1756 | if (ca->maxresp_cached < NFSD_MIN_HDR_SEQ_SZ) |
1757 | size = 0; | |
1758 | else | |
1759 | size = ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
1760 | return size + sizeof(struct nfsd4_slot); | |
5b6feee9 | 1761 | } |
ec6b5d7b | 1762 | |
5b6feee9 BF |
1763 | /* |
1764 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c | 1765 | * re-negotiate active sessions and reduce their slot usage to make |
42b2aa86 | 1766 | * room for new connections. For now we just fail the create session. |
ec6b5d7b | 1767 | */ |
2030ca56 | 1768 | static u32 nfsd4_get_drc_mem(struct nfsd4_channel_attrs *ca, struct nfsd_net *nn) |
ec6b5d7b | 1769 | { |
55c760cf BF |
1770 | u32 slotsize = slot_bytes(ca); |
1771 | u32 num = ca->maxreqs; | |
c54f24e3 | 1772 | unsigned long avail, total_avail; |
2030ca56 | 1773 | unsigned int scale_factor; |
ec6b5d7b | 1774 | |
5b6feee9 | 1775 | spin_lock(&nfsd_drc_lock); |
7f49fd5d N |
1776 | if (nfsd_drc_max_mem > nfsd_drc_mem_used) |
1777 | total_avail = nfsd_drc_max_mem - nfsd_drc_mem_used; | |
1778 | else | |
1779 | /* We have handed out more space than we chose in | |
1780 | * set_max_drc() to allow. That isn't really a | |
1781 | * problem as long as that doesn't make us think we | |
1782 | * have lots more due to integer overflow. | |
1783 | */ | |
1784 | total_avail = 0; | |
c54f24e3 | 1785 | avail = min((unsigned long)NFSD_MAX_MEM_PER_SESSION, total_avail); |
de766e57 | 1786 | /* |
2030ca56 | 1787 | * Never use more than a fraction of the remaining memory, |
7f49fd5d | 1788 | * unless it's the only way to give this client a slot. |
2030ca56 N |
1789 | * The chosen fraction is either 1/8 or 1/number of threads, |
1790 | * whichever is smaller. This ensures there are adequate | |
1791 | * slots to support multiple clients per thread. | |
7f49fd5d N |
1792 | * Give the client one slot even if that would require |
1793 | * over-allocation--it is better than failure. | |
de766e57 | 1794 | */ |
2030ca56 N |
1795 | scale_factor = max_t(unsigned int, 8, nn->nfsd_serv->sv_nrthreads); |
1796 | ||
1797 | avail = clamp_t(unsigned long, avail, slotsize, | |
1798 | total_avail/scale_factor); | |
5b6feee9 | 1799 | num = min_t(int, num, avail / slotsize); |
7f49fd5d | 1800 | num = max_t(int, num, 1); |
5b6feee9 BF |
1801 | nfsd_drc_mem_used += num * slotsize; |
1802 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 1803 | |
5b6feee9 BF |
1804 | return num; |
1805 | } | |
ec6b5d7b | 1806 | |
55c760cf | 1807 | static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs *ca) |
5b6feee9 | 1808 | { |
55c760cf BF |
1809 | int slotsize = slot_bytes(ca); |
1810 | ||
4bd9b0f4 | 1811 | spin_lock(&nfsd_drc_lock); |
55c760cf | 1812 | nfsd_drc_mem_used -= slotsize * ca->maxreqs; |
4bd9b0f4 | 1813 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 1814 | } |
ec6b5d7b | 1815 | |
60810e54 KM |
1816 | static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fattrs, |
1817 | struct nfsd4_channel_attrs *battrs) | |
5b6feee9 | 1818 | { |
60810e54 KM |
1819 | int numslots = fattrs->maxreqs; |
1820 | int slotsize = slot_bytes(fattrs); | |
5b6feee9 BF |
1821 | struct nfsd4_session *new; |
1822 | int mem, i; | |
a649637c | 1823 | |
5b6feee9 BF |
1824 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
1825 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
1826 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 1827 | |
5b6feee9 BF |
1828 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
1829 | if (!new) | |
1830 | return NULL; | |
557ce264 | 1831 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 | 1832 | for (i = 0; i < numslots; i++) { |
55c760cf | 1833 | new->se_slots[i] = kzalloc(slotsize, GFP_KERNEL); |
5b6feee9 | 1834 | if (!new->se_slots[i]) |
557ce264 | 1835 | goto out_free; |
557ce264 | 1836 | } |
60810e54 KM |
1837 | |
1838 | memcpy(&new->se_fchannel, fattrs, sizeof(struct nfsd4_channel_attrs)); | |
1839 | memcpy(&new->se_bchannel, battrs, sizeof(struct nfsd4_channel_attrs)); | |
1840 | ||
5b6feee9 BF |
1841 | return new; |
1842 | out_free: | |
1843 | while (i--) | |
1844 | kfree(new->se_slots[i]); | |
1845 | kfree(new); | |
1846 | return NULL; | |
ec6b5d7b AA |
1847 | } |
1848 | ||
19cf5c02 BF |
1849 | static void free_conn(struct nfsd4_conn *c) |
1850 | { | |
1851 | svc_xprt_put(c->cn_xprt); | |
1852 | kfree(c); | |
1853 | } | |
ec6b5d7b | 1854 | |
19cf5c02 BF |
1855 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
1856 | { | |
1857 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
1858 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 1859 | |
806d65b6 CL |
1860 | trace_nfsd_cb_lost(clp); |
1861 | ||
19cf5c02 BF |
1862 | spin_lock(&clp->cl_lock); |
1863 | if (!list_empty(&c->cn_persession)) { | |
1864 | list_del(&c->cn_persession); | |
1865 | free_conn(c); | |
1866 | } | |
eea49806 | 1867 | nfsd4_probe_callback(clp); |
2e4b7239 | 1868 | spin_unlock(&clp->cl_lock); |
19cf5c02 | 1869 | } |
ec6b5d7b | 1870 | |
d29c374c | 1871 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 1872 | { |
c7662518 | 1873 | struct nfsd4_conn *conn; |
ec6b5d7b | 1874 | |
c7662518 BF |
1875 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
1876 | if (!conn) | |
db90681d | 1877 | return NULL; |
c7662518 BF |
1878 | svc_xprt_get(rqstp->rq_xprt); |
1879 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 1880 | conn->cn_flags = flags; |
db90681d BF |
1881 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
1882 | return conn; | |
1883 | } | |
a649637c | 1884 | |
328ead28 BF |
1885 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
1886 | { | |
1887 | conn->cn_session = ses; | |
1888 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
1889 | } |
1890 | ||
db90681d | 1891 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 1892 | { |
db90681d | 1893 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 1894 | |
c7662518 | 1895 | spin_lock(&clp->cl_lock); |
328ead28 | 1896 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 1897 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
1898 | } |
1899 | ||
21b75b01 | 1900 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 1901 | { |
19cf5c02 | 1902 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 1903 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
1904 | } |
1905 | ||
e1ff371f | 1906 | static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses) |
ec6b5d7b | 1907 | { |
21b75b01 | 1908 | int ret; |
ec6b5d7b | 1909 | |
db90681d | 1910 | nfsd4_hash_conn(conn, ses); |
21b75b01 BF |
1911 | ret = nfsd4_register_conn(conn); |
1912 | if (ret) | |
1913 | /* oops; xprt is already down: */ | |
1914 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
57a37144 BF |
1915 | /* We may have gained or lost a callback channel: */ |
1916 | nfsd4_probe_callback_sync(ses->se_client); | |
c7662518 | 1917 | } |
ec6b5d7b | 1918 | |
e1ff371f | 1919 | static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses) |
1d1bc8f2 BF |
1920 | { |
1921 | u32 dir = NFS4_CDFC4_FORE; | |
1922 | ||
e1ff371f | 1923 | if (cses->flags & SESSION4_BACK_CHAN) |
1d1bc8f2 | 1924 | dir |= NFS4_CDFC4_BACK; |
e1ff371f | 1925 | return alloc_conn(rqstp, dir); |
1d1bc8f2 BF |
1926 | } |
1927 | ||
1928 | /* must be called under client_lock */ | |
19cf5c02 | 1929 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 1930 | { |
19cf5c02 BF |
1931 | struct nfs4_client *clp = s->se_client; |
1932 | struct nfsd4_conn *c; | |
ec6b5d7b | 1933 | |
19cf5c02 BF |
1934 | spin_lock(&clp->cl_lock); |
1935 | while (!list_empty(&s->se_conns)) { | |
1936 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
1937 | list_del_init(&c->cn_persession); | |
1938 | spin_unlock(&clp->cl_lock); | |
557ce264 | 1939 | |
19cf5c02 BF |
1940 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
1941 | free_conn(c); | |
ec6b5d7b | 1942 | |
19cf5c02 BF |
1943 | spin_lock(&clp->cl_lock); |
1944 | } | |
1945 | spin_unlock(&clp->cl_lock); | |
c7662518 | 1946 | } |
ec6b5d7b | 1947 | |
1377b69e BF |
1948 | static void __free_session(struct nfsd4_session *ses) |
1949 | { | |
1377b69e BF |
1950 | free_session_slots(ses); |
1951 | kfree(ses); | |
1952 | } | |
1953 | ||
66b2b9b2 | 1954 | static void free_session(struct nfsd4_session *ses) |
c7662518 | 1955 | { |
19cf5c02 | 1956 | nfsd4_del_conns(ses); |
55c760cf | 1957 | nfsd4_put_drc_mem(&ses->se_fchannel); |
1377b69e | 1958 | __free_session(ses); |
c7662518 BF |
1959 | } |
1960 | ||
135ae827 | 1961 | static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
a827bcb2 | 1962 | { |
a827bcb2 | 1963 | int idx; |
1872de0e | 1964 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
a827bcb2 | 1965 | |
ec6b5d7b AA |
1966 | new->se_client = clp; |
1967 | gen_sessionid(new); | |
ec6b5d7b | 1968 | |
c7662518 BF |
1969 | INIT_LIST_HEAD(&new->se_conns); |
1970 | ||
ac7c46f2 | 1971 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 1972 | new->se_flags = cses->flags; |
8b5ce5cd | 1973 | new->se_cb_prog = cses->callback_prog; |
c6bb3ca2 | 1974 | new->se_cb_sec = cses->cb_sec; |
66b2b9b2 | 1975 | atomic_set(&new->se_ref, 0); |
5b6feee9 | 1976 | idx = hash_sessionid(&new->se_sessionid); |
1872de0e | 1977 | list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]); |
4c649378 | 1978 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 1979 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 1980 | spin_unlock(&clp->cl_lock); |
60810e54 | 1981 | |
b0d2e42c | 1982 | { |
edd76786 | 1983 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
1984 | /* |
1985 | * This is a little silly; with sessions there's no real | |
1986 | * use for the callback address. Use the peer address | |
1987 | * as a reasonable default for now, but consider fixing | |
1988 | * the rpc client not to require an address in the | |
1989 | * future: | |
1990 | */ | |
edd76786 BF |
1991 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
1992 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 1993 | } |
ec6b5d7b AA |
1994 | } |
1995 | ||
9089f1b4 | 1996 | /* caller must hold client_lock */ |
5282fd72 | 1997 | static struct nfsd4_session * |
d4e19e70 | 1998 | __find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net) |
5282fd72 ME |
1999 | { |
2000 | struct nfsd4_session *elem; | |
2001 | int idx; | |
1872de0e | 2002 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
5282fd72 | 2003 | |
0a880a28 TM |
2004 | lockdep_assert_held(&nn->client_lock); |
2005 | ||
5282fd72 ME |
2006 | dump_sessionid(__func__, sessionid); |
2007 | idx = hash_sessionid(sessionid); | |
5282fd72 | 2008 | /* Search in the appropriate list */ |
1872de0e | 2009 | list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) { |
5282fd72 ME |
2010 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
2011 | NFS4_MAX_SESSIONID_LEN)) { | |
2012 | return elem; | |
2013 | } | |
2014 | } | |
2015 | ||
2016 | dprintk("%s: session not found\n", __func__); | |
2017 | return NULL; | |
2018 | } | |
2019 | ||
d4e19e70 TM |
2020 | static struct nfsd4_session * |
2021 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net, | |
2022 | __be32 *ret) | |
2023 | { | |
2024 | struct nfsd4_session *session; | |
2025 | __be32 status = nfserr_badsession; | |
2026 | ||
2027 | session = __find_in_sessionid_hashtbl(sessionid, net); | |
2028 | if (!session) | |
2029 | goto out; | |
2030 | status = nfsd4_get_session_locked(session); | |
2031 | if (status) | |
2032 | session = NULL; | |
2033 | out: | |
2034 | *ret = status; | |
2035 | return session; | |
2036 | } | |
2037 | ||
9089f1b4 | 2038 | /* caller must hold client_lock */ |
7116ed6b | 2039 | static void |
5282fd72 | 2040 | unhash_session(struct nfsd4_session *ses) |
7116ed6b | 2041 | { |
0a880a28 TM |
2042 | struct nfs4_client *clp = ses->se_client; |
2043 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
2044 | ||
2045 | lockdep_assert_held(&nn->client_lock); | |
2046 | ||
7116ed6b | 2047 | list_del(&ses->se_hash); |
4c649378 | 2048 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 2049 | list_del(&ses->se_perclnt); |
4c649378 | 2050 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
2051 | } |
2052 | ||
1da177e4 LT |
2053 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
2054 | static int | |
2c142baa | 2055 | STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn) |
1da177e4 | 2056 | { |
bbc7f33a BF |
2057 | /* |
2058 | * We're assuming the clid was not given out from a boot | |
2059 | * precisely 2^32 (about 136 years) before this one. That seems | |
2060 | * a safe assumption: | |
2061 | */ | |
2062 | if (clid->cl_boot == (u32)nn->boot_time) | |
1da177e4 | 2063 | return 0; |
dd5e3fbc | 2064 | trace_nfsd_clid_stale(clid); |
1da177e4 LT |
2065 | return 1; |
2066 | } | |
2067 | ||
2068 | /* | |
2069 | * XXX Should we use a slab cache ? | |
2070 | * This type of memory management is somewhat inefficient, but we use it | |
2071 | * anyway since SETCLIENTID is not a common operation. | |
2072 | */ | |
0926c395 DN |
2073 | static struct nfs4_client *alloc_client(struct xdr_netobj name, |
2074 | struct nfsd_net *nn) | |
1da177e4 LT |
2075 | { |
2076 | struct nfs4_client *clp; | |
d4f0489f | 2077 | int i; |
1da177e4 | 2078 | |
4271c2c0 DN |
2079 | if (atomic_read(&nn->nfs4_client_count) >= nn->nfs4_max_clients) { |
2080 | mod_delayed_work(laundry_wq, &nn->laundromat_work, 0); | |
2081 | return NULL; | |
2082 | } | |
9258a2d5 | 2083 | clp = kmem_cache_zalloc(client_slab, GFP_KERNEL); |
35bba9a3 BF |
2084 | if (clp == NULL) |
2085 | return NULL; | |
6f4859b8 | 2086 | xdr_netobj_dup(&clp->cl_name, &name, GFP_KERNEL); |
d4f0489f TM |
2087 | if (clp->cl_name.data == NULL) |
2088 | goto err_no_name; | |
6da2ec56 KC |
2089 | clp->cl_ownerstr_hashtbl = kmalloc_array(OWNER_HASH_SIZE, |
2090 | sizeof(struct list_head), | |
2091 | GFP_KERNEL); | |
d4f0489f TM |
2092 | if (!clp->cl_ownerstr_hashtbl) |
2093 | goto err_no_hashtbl; | |
2094 | for (i = 0; i < OWNER_HASH_SIZE; i++) | |
2095 | INIT_LIST_HEAD(&clp->cl_ownerstr_hashtbl[i]); | |
5694c93e TM |
2096 | INIT_LIST_HEAD(&clp->cl_sessions); |
2097 | idr_init(&clp->cl_stateids); | |
14ed14cc | 2098 | atomic_set(&clp->cl_rpc_users, 0); |
5694c93e | 2099 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; |
66af2579 | 2100 | clp->cl_state = NFSD4_ACTIVE; |
0926c395 | 2101 | atomic_inc(&nn->nfs4_client_count); |
66af2579 | 2102 | atomic_set(&clp->cl_delegs_in_recall, 0); |
5694c93e TM |
2103 | INIT_LIST_HEAD(&clp->cl_idhash); |
2104 | INIT_LIST_HEAD(&clp->cl_openowners); | |
2105 | INIT_LIST_HEAD(&clp->cl_delegations); | |
2106 | INIT_LIST_HEAD(&clp->cl_lru); | |
5694c93e | 2107 | INIT_LIST_HEAD(&clp->cl_revoked); |
9cf514cc CH |
2108 | #ifdef CONFIG_NFSD_PNFS |
2109 | INIT_LIST_HEAD(&clp->cl_lo_states); | |
2110 | #endif | |
e0639dc5 OK |
2111 | INIT_LIST_HEAD(&clp->async_copies); |
2112 | spin_lock_init(&clp->async_lock); | |
5694c93e TM |
2113 | spin_lock_init(&clp->cl_lock); |
2114 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1da177e4 | 2115 | return clp; |
d4f0489f TM |
2116 | err_no_hashtbl: |
2117 | kfree(clp->cl_name.data); | |
2118 | err_no_name: | |
9258a2d5 | 2119 | kmem_cache_free(client_slab, clp); |
d4f0489f | 2120 | return NULL; |
1da177e4 LT |
2121 | } |
2122 | ||
59f8e91b BF |
2123 | static void __free_client(struct kref *k) |
2124 | { | |
e8a79fb1 BF |
2125 | struct nfsdfs_client *c = container_of(k, struct nfsdfs_client, cl_ref); |
2126 | struct nfs4_client *clp = container_of(c, struct nfs4_client, cl_nfsdfs); | |
59f8e91b BF |
2127 | |
2128 | free_svc_cred(&clp->cl_cred); | |
2129 | kfree(clp->cl_ownerstr_hashtbl); | |
2130 | kfree(clp->cl_name.data); | |
79123444 BF |
2131 | kfree(clp->cl_nii_domain.data); |
2132 | kfree(clp->cl_nii_name.data); | |
59f8e91b | 2133 | idr_destroy(&clp->cl_stateids); |
59f8e91b BF |
2134 | kmem_cache_free(client_slab, clp); |
2135 | } | |
2136 | ||
297e57a2 | 2137 | static void drop_client(struct nfs4_client *clp) |
59f8e91b | 2138 | { |
e8a79fb1 | 2139 | kref_put(&clp->cl_nfsdfs.cl_ref, __free_client); |
59f8e91b BF |
2140 | } |
2141 | ||
4dd86e15 | 2142 | static void |
1da177e4 LT |
2143 | free_client(struct nfs4_client *clp) |
2144 | { | |
792c95dd BF |
2145 | while (!list_empty(&clp->cl_sessions)) { |
2146 | struct nfsd4_session *ses; | |
2147 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
2148 | se_perclnt); | |
2149 | list_del(&ses->se_perclnt); | |
66b2b9b2 BF |
2150 | WARN_ON_ONCE(atomic_read(&ses->se_ref)); |
2151 | free_session(ses); | |
792c95dd | 2152 | } |
4cb57e30 | 2153 | rpc_destroy_wait_queue(&clp->cl_cb_waitq); |
89c905be | 2154 | if (clp->cl_nfsd_dentry) { |
e8a79fb1 | 2155 | nfsd_client_rmdir(clp->cl_nfsd_dentry); |
89c905be BF |
2156 | clp->cl_nfsd_dentry = NULL; |
2157 | wake_up_all(&expiry_wq); | |
2158 | } | |
59f8e91b | 2159 | drop_client(clp); |
1da177e4 LT |
2160 | } |
2161 | ||
84d38ac9 | 2162 | /* must be called under the client_lock */ |
4beb345b | 2163 | static void |
84d38ac9 BH |
2164 | unhash_client_locked(struct nfs4_client *clp) |
2165 | { | |
4beb345b | 2166 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
792c95dd BF |
2167 | struct nfsd4_session *ses; |
2168 | ||
0a880a28 TM |
2169 | lockdep_assert_held(&nn->client_lock); |
2170 | ||
4beb345b TM |
2171 | /* Mark the client as expired! */ |
2172 | clp->cl_time = 0; | |
2173 | /* Make it invisible */ | |
2174 | if (!list_empty(&clp->cl_idhash)) { | |
2175 | list_del_init(&clp->cl_idhash); | |
2176 | if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) | |
2177 | rb_erase(&clp->cl_namenode, &nn->conf_name_tree); | |
2178 | else | |
2179 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); | |
2180 | } | |
2181 | list_del_init(&clp->cl_lru); | |
4c649378 | 2182 | spin_lock(&clp->cl_lock); |
792c95dd BF |
2183 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
2184 | list_del_init(&ses->se_hash); | |
4c649378 | 2185 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
2186 | } |
2187 | ||
1da177e4 | 2188 | static void |
4beb345b TM |
2189 | unhash_client(struct nfs4_client *clp) |
2190 | { | |
2191 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
2192 | ||
2193 | spin_lock(&nn->client_lock); | |
2194 | unhash_client_locked(clp); | |
2195 | spin_unlock(&nn->client_lock); | |
2196 | } | |
2197 | ||
97403d95 JL |
2198 | static __be32 mark_client_expired_locked(struct nfs4_client *clp) |
2199 | { | |
14ed14cc | 2200 | if (atomic_read(&clp->cl_rpc_users)) |
97403d95 JL |
2201 | return nfserr_jukebox; |
2202 | unhash_client_locked(clp); | |
2203 | return nfs_ok; | |
2204 | } | |
2205 | ||
4beb345b TM |
2206 | static void |
2207 | __destroy_client(struct nfs4_client *clp) | |
1da177e4 | 2208 | { |
0926c395 | 2209 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
68ef3bc3 | 2210 | int i; |
fe0750e5 | 2211 | struct nfs4_openowner *oo; |
1da177e4 | 2212 | struct nfs4_delegation *dp; |
1da177e4 LT |
2213 | struct list_head reaplist; |
2214 | ||
1da177e4 | 2215 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 2216 | spin_lock(&state_lock); |
ea1da636 N |
2217 | while (!list_empty(&clp->cl_delegations)) { |
2218 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
3fcbbd24 | 2219 | WARN_ON(!unhash_delegation_locked(dp)); |
42690676 | 2220 | list_add(&dp->dl_recall_lru, &reaplist); |
1da177e4 | 2221 | } |
cdc97505 | 2222 | spin_unlock(&state_lock); |
1da177e4 LT |
2223 | while (!list_empty(&reaplist)) { |
2224 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
42690676 | 2225 | list_del_init(&dp->dl_recall_lru); |
0af6e690 | 2226 | destroy_unhashed_deleg(dp); |
1da177e4 | 2227 | } |
2d4a532d | 2228 | while (!list_empty(&clp->cl_revoked)) { |
c876486b | 2229 | dp = list_entry(clp->cl_revoked.next, struct nfs4_delegation, dl_recall_lru); |
2d4a532d | 2230 | list_del_init(&dp->dl_recall_lru); |
6011695d | 2231 | nfs4_put_stid(&dp->dl_stid); |
956c4fee | 2232 | } |
ea1da636 | 2233 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 | 2234 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
b5971afa | 2235 | nfs4_get_stateowner(&oo->oo_owner); |
fe0750e5 | 2236 | release_openowner(oo); |
1da177e4 | 2237 | } |
68ef3bc3 JL |
2238 | for (i = 0; i < OWNER_HASH_SIZE; i++) { |
2239 | struct nfs4_stateowner *so, *tmp; | |
2240 | ||
2241 | list_for_each_entry_safe(so, tmp, &clp->cl_ownerstr_hashtbl[i], | |
2242 | so_strhash) { | |
2243 | /* Should be no openowners at this point */ | |
2244 | WARN_ON_ONCE(so->so_is_open_owner); | |
2245 | remove_blocked_locks(lockowner(so)); | |
2246 | } | |
2247 | } | |
9cf514cc | 2248 | nfsd4_return_all_client_layouts(clp); |
e0639dc5 | 2249 | nfsd4_shutdown_copy(clp); |
6ff8da08 | 2250 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
2251 | if (clp->cl_cb_conn.cb_xprt) |
2252 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
0926c395 | 2253 | atomic_add_unless(&nn->nfs4_client_count, -1, 0); |
3a4ea23d | 2254 | nfsd4_dec_courtesy_client_count(nn, clp); |
221a6876 | 2255 | free_client(clp); |
89c905be | 2256 | wake_up_all(&expiry_wq); |
1da177e4 LT |
2257 | } |
2258 | ||
4beb345b TM |
2259 | static void |
2260 | destroy_client(struct nfs4_client *clp) | |
2261 | { | |
2262 | unhash_client(clp); | |
2263 | __destroy_client(clp); | |
2264 | } | |
2265 | ||
362063a5 SM |
2266 | static void inc_reclaim_complete(struct nfs4_client *clp) |
2267 | { | |
2268 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
2269 | ||
2270 | if (!nn->track_reclaim_completes) | |
2271 | return; | |
2272 | if (!nfsd4_find_reclaim_client(clp->cl_name, nn)) | |
2273 | return; | |
2274 | if (atomic_inc_return(&nn->nr_reclaim_complete) == | |
2275 | nn->reclaim_str_hashtbl_size) { | |
2276 | printk(KERN_INFO "NFSD: all clients done reclaiming, ending NFSv4 grace period (net %x)\n", | |
2277 | clp->net->ns.inum); | |
2278 | nfsd4_end_grace(nn); | |
2279 | } | |
2280 | } | |
2281 | ||
0d22f68f BF |
2282 | static void expire_client(struct nfs4_client *clp) |
2283 | { | |
4beb345b | 2284 | unhash_client(clp); |
0d22f68f | 2285 | nfsd4_client_record_remove(clp); |
4beb345b | 2286 | __destroy_client(clp); |
0d22f68f BF |
2287 | } |
2288 | ||
35bba9a3 BF |
2289 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
2290 | { | |
2291 | memcpy(target->cl_verifier.data, source->data, | |
2292 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
2293 | } |
2294 | ||
35bba9a3 BF |
2295 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
2296 | { | |
1da177e4 LT |
2297 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
2298 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
2299 | } | |
2300 | ||
50043859 BF |
2301 | static int copy_cred(struct svc_cred *target, struct svc_cred *source) |
2302 | { | |
2f10fdcb N |
2303 | target->cr_principal = kstrdup(source->cr_principal, GFP_KERNEL); |
2304 | target->cr_raw_principal = kstrdup(source->cr_raw_principal, | |
2305 | GFP_KERNEL); | |
9abdda5d CL |
2306 | target->cr_targ_princ = kstrdup(source->cr_targ_princ, GFP_KERNEL); |
2307 | if ((source->cr_principal && !target->cr_principal) || | |
2308 | (source->cr_raw_principal && !target->cr_raw_principal) || | |
2309 | (source->cr_targ_princ && !target->cr_targ_princ)) | |
2f10fdcb | 2310 | return -ENOMEM; |
50043859 | 2311 | |
d5497fc6 | 2312 | target->cr_flavor = source->cr_flavor; |
1da177e4 LT |
2313 | target->cr_uid = source->cr_uid; |
2314 | target->cr_gid = source->cr_gid; | |
2315 | target->cr_group_info = source->cr_group_info; | |
2316 | get_group_info(target->cr_group_info); | |
0dc1531a BF |
2317 | target->cr_gss_mech = source->cr_gss_mech; |
2318 | if (source->cr_gss_mech) | |
2319 | gss_mech_get(source->cr_gss_mech); | |
03a4e1f6 | 2320 | return 0; |
1da177e4 LT |
2321 | } |
2322 | ||
ef17af2a | 2323 | static int |
ac55fdc4 JL |
2324 | compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2) |
2325 | { | |
ef17af2a RV |
2326 | if (o1->len < o2->len) |
2327 | return -1; | |
2328 | if (o1->len > o2->len) | |
2329 | return 1; | |
2330 | return memcmp(o1->data, o2->data, o1->len); | |
ac55fdc4 JL |
2331 | } |
2332 | ||
1da177e4 | 2333 | static int |
599e0a22 BF |
2334 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
2335 | { | |
2336 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
2337 | } |
2338 | ||
2339 | static int | |
599e0a22 BF |
2340 | same_clid(clientid_t *cl1, clientid_t *cl2) |
2341 | { | |
2342 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
2343 | } |
2344 | ||
8fbba96e BF |
2345 | static bool groups_equal(struct group_info *g1, struct group_info *g2) |
2346 | { | |
2347 | int i; | |
2348 | ||
2349 | if (g1->ngroups != g2->ngroups) | |
2350 | return false; | |
2351 | for (i=0; i<g1->ngroups; i++) | |
81243eac | 2352 | if (!gid_eq(g1->gid[i], g2->gid[i])) |
8fbba96e BF |
2353 | return false; |
2354 | return true; | |
2355 | } | |
2356 | ||
68eb3508 BF |
2357 | /* |
2358 | * RFC 3530 language requires clid_inuse be returned when the | |
2359 | * "principal" associated with a requests differs from that previously | |
2360 | * used. We use uid, gid's, and gss principal string as our best | |
2361 | * approximation. We also don't want to allow non-gss use of a client | |
2362 | * established using gss: in theory cr_principal should catch that | |
2363 | * change, but in practice cr_principal can be null even in the gss case | |
2364 | * since gssd doesn't always pass down a principal string. | |
2365 | */ | |
2366 | static bool is_gss_cred(struct svc_cred *cr) | |
2367 | { | |
2368 | /* Is cr_flavor one of the gss "pseudoflavors"?: */ | |
2369 | return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR); | |
2370 | } | |
2371 | ||
2372 | ||
5559b50a | 2373 | static bool |
599e0a22 BF |
2374 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
2375 | { | |
68eb3508 | 2376 | if ((is_gss_cred(cr1) != is_gss_cred(cr2)) |
6fab8779 EB |
2377 | || (!uid_eq(cr1->cr_uid, cr2->cr_uid)) |
2378 | || (!gid_eq(cr1->cr_gid, cr2->cr_gid)) | |
8fbba96e BF |
2379 | || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) |
2380 | return false; | |
9abdda5d | 2381 | /* XXX: check that cr_targ_princ fields match ? */ |
8fbba96e BF |
2382 | if (cr1->cr_principal == cr2->cr_principal) |
2383 | return true; | |
2384 | if (!cr1->cr_principal || !cr2->cr_principal) | |
2385 | return false; | |
5559b50a | 2386 | return 0 == strcmp(cr1->cr_principal, cr2->cr_principal); |
1da177e4 LT |
2387 | } |
2388 | ||
57266a6e BF |
2389 | static bool svc_rqst_integrity_protected(struct svc_rqst *rqstp) |
2390 | { | |
2391 | struct svc_cred *cr = &rqstp->rq_cred; | |
2392 | u32 service; | |
2393 | ||
c4720591 BF |
2394 | if (!cr->cr_gss_mech) |
2395 | return false; | |
57266a6e BF |
2396 | service = gss_pseudoflavor_to_service(cr->cr_gss_mech, cr->cr_flavor); |
2397 | return service == RPC_GSS_SVC_INTEGRITY || | |
2398 | service == RPC_GSS_SVC_PRIVACY; | |
2399 | } | |
2400 | ||
dedeb13f | 2401 | bool nfsd4_mach_creds_match(struct nfs4_client *cl, struct svc_rqst *rqstp) |
57266a6e BF |
2402 | { |
2403 | struct svc_cred *cr = &rqstp->rq_cred; | |
2404 | ||
2405 | if (!cl->cl_mach_cred) | |
2406 | return true; | |
2407 | if (cl->cl_cred.cr_gss_mech != cr->cr_gss_mech) | |
2408 | return false; | |
2409 | if (!svc_rqst_integrity_protected(rqstp)) | |
2410 | return false; | |
414ca017 BF |
2411 | if (cl->cl_cred.cr_raw_principal) |
2412 | return 0 == strcmp(cl->cl_cred.cr_raw_principal, | |
2413 | cr->cr_raw_principal); | |
57266a6e BF |
2414 | if (!cr->cr_principal) |
2415 | return false; | |
2416 | return 0 == strcmp(cl->cl_cred.cr_principal, cr->cr_principal); | |
2417 | } | |
2418 | ||
294ac32e | 2419 | static void gen_confirm(struct nfs4_client *clp, struct nfsd_net *nn) |
deda2faa | 2420 | { |
ab4684d1 | 2421 | __be32 verf[2]; |
1da177e4 | 2422 | |
f419992c JL |
2423 | /* |
2424 | * This is opaque to client, so no need to byte-swap. Use | |
2425 | * __force to keep sparse happy | |
2426 | */ | |
9104ae49 | 2427 | verf[0] = (__force __be32)(u32)ktime_get_real_seconds(); |
19311aa8 | 2428 | verf[1] = (__force __be32)nn->clverifier_counter++; |
ab4684d1 | 2429 | memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); |
1da177e4 LT |
2430 | } |
2431 | ||
294ac32e JL |
2432 | static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn) |
2433 | { | |
9cc76801 | 2434 | clp->cl_clientid.cl_boot = (u32)nn->boot_time; |
294ac32e JL |
2435 | clp->cl_clientid.cl_id = nn->clientid_counter++; |
2436 | gen_confirm(clp, nn); | |
2437 | } | |
2438 | ||
4770d722 JL |
2439 | static struct nfs4_stid * |
2440 | find_stateid_locked(struct nfs4_client *cl, stateid_t *t) | |
4581d140 | 2441 | { |
3abdb607 BF |
2442 | struct nfs4_stid *ret; |
2443 | ||
2444 | ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id); | |
2445 | if (!ret || !ret->sc_type) | |
2446 | return NULL; | |
2447 | return ret; | |
4d71ab87 BF |
2448 | } |
2449 | ||
4770d722 JL |
2450 | static struct nfs4_stid * |
2451 | find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) | |
f459e453 BF |
2452 | { |
2453 | struct nfs4_stid *s; | |
4d71ab87 | 2454 | |
4770d722 JL |
2455 | spin_lock(&cl->cl_lock); |
2456 | s = find_stateid_locked(cl, t); | |
2d3f9668 TM |
2457 | if (s != NULL) { |
2458 | if (typemask & s->sc_type) | |
a15dfcd5 | 2459 | refcount_inc(&s->sc_count); |
2d3f9668 TM |
2460 | else |
2461 | s = NULL; | |
2462 | } | |
4770d722 JL |
2463 | spin_unlock(&cl->cl_lock); |
2464 | return s; | |
4581d140 BF |
2465 | } |
2466 | ||
a204f25e BF |
2467 | static struct nfs4_client *get_nfsdfs_clp(struct inode *inode) |
2468 | { | |
2469 | struct nfsdfs_client *nc; | |
2470 | nc = get_nfsdfs_client(inode); | |
2471 | if (!nc) | |
2472 | return NULL; | |
2473 | return container_of(nc, struct nfs4_client, cl_nfsdfs); | |
2474 | } | |
2475 | ||
169319f1 BF |
2476 | static void seq_quote_mem(struct seq_file *m, char *data, int len) |
2477 | { | |
2478 | seq_printf(m, "\""); | |
c0546391 | 2479 | seq_escape_mem(m, data, len, ESCAPE_HEX | ESCAPE_NAP | ESCAPE_APPEND, "\"\\"); |
169319f1 BF |
2480 | seq_printf(m, "\""); |
2481 | } | |
2482 | ||
3518c866 DW |
2483 | static const char *cb_state2str(int state) |
2484 | { | |
2485 | switch (state) { | |
2486 | case NFSD4_CB_UP: | |
2487 | return "UP"; | |
2488 | case NFSD4_CB_UNKNOWN: | |
2489 | return "UNKNOWN"; | |
2490 | case NFSD4_CB_DOWN: | |
2491 | return "DOWN"; | |
2492 | case NFSD4_CB_FAULT: | |
2493 | return "FAULT"; | |
2494 | } | |
2495 | return "UNDEFINED"; | |
2496 | } | |
2497 | ||
97ad4031 BF |
2498 | static int client_info_show(struct seq_file *m, void *v) |
2499 | { | |
1d7f6b30 | 2500 | struct inode *inode = file_inode(m->file); |
97ad4031 BF |
2501 | struct nfs4_client *clp; |
2502 | u64 clid; | |
2503 | ||
a204f25e BF |
2504 | clp = get_nfsdfs_clp(inode); |
2505 | if (!clp) | |
97ad4031 | 2506 | return -ENXIO; |
97ad4031 BF |
2507 | memcpy(&clid, &clp->cl_clientid, sizeof(clid)); |
2508 | seq_printf(m, "clientid: 0x%llx\n", clid); | |
169319f1 | 2509 | seq_printf(m, "address: \"%pISpc\"\n", (struct sockaddr *)&clp->cl_addr); |
e9488d5a DN |
2510 | |
2511 | if (clp->cl_state == NFSD4_COURTESY) | |
2512 | seq_puts(m, "status: courtesy\n"); | |
2513 | else if (clp->cl_state == NFSD4_EXPIRABLE) | |
2514 | seq_puts(m, "status: expirable\n"); | |
2515 | else if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) | |
472d155a N |
2516 | seq_puts(m, "status: confirmed\n"); |
2517 | else | |
2518 | seq_puts(m, "status: unconfirmed\n"); | |
e9488d5a DN |
2519 | seq_printf(m, "seconds from last renew: %lld\n", |
2520 | ktime_get_boottime_seconds() - clp->cl_time); | |
169319f1 BF |
2521 | seq_printf(m, "name: "); |
2522 | seq_quote_mem(m, clp->cl_name.data, clp->cl_name.len); | |
2523 | seq_printf(m, "\nminor version: %d\n", clp->cl_minorversion); | |
79123444 BF |
2524 | if (clp->cl_nii_domain.data) { |
2525 | seq_printf(m, "Implementation domain: "); | |
2526 | seq_quote_mem(m, clp->cl_nii_domain.data, | |
2527 | clp->cl_nii_domain.len); | |
2528 | seq_printf(m, "\nImplementation name: "); | |
2529 | seq_quote_mem(m, clp->cl_nii_name.data, clp->cl_nii_name.len); | |
e29f4703 | 2530 | seq_printf(m, "\nImplementation time: [%lld, %ld]\n", |
79123444 BF |
2531 | clp->cl_nii_time.tv_sec, clp->cl_nii_time.tv_nsec); |
2532 | } | |
3518c866 DW |
2533 | seq_printf(m, "callback state: %s\n", cb_state2str(clp->cl_cb_state)); |
2534 | seq_printf(m, "callback address: %pISpc\n", &clp->cl_cb_conn.cb_addr); | |
97ad4031 BF |
2535 | drop_client(clp); |
2536 | ||
2537 | return 0; | |
2538 | } | |
2539 | ||
1d7f6b30 | 2540 | DEFINE_SHOW_ATTRIBUTE(client_info); |
97ad4031 | 2541 | |
78599c42 BF |
2542 | static void *states_start(struct seq_file *s, loff_t *pos) |
2543 | __acquires(&clp->cl_lock) | |
2544 | { | |
2545 | struct nfs4_client *clp = s->private; | |
2546 | unsigned long id = *pos; | |
2547 | void *ret; | |
2548 | ||
2549 | spin_lock(&clp->cl_lock); | |
2550 | ret = idr_get_next_ul(&clp->cl_stateids, &id); | |
2551 | *pos = id; | |
2552 | return ret; | |
2553 | } | |
2554 | ||
2555 | static void *states_next(struct seq_file *s, void *v, loff_t *pos) | |
2556 | { | |
2557 | struct nfs4_client *clp = s->private; | |
2558 | unsigned long id = *pos; | |
2559 | void *ret; | |
2560 | ||
2561 | id = *pos; | |
2562 | id++; | |
2563 | ret = idr_get_next_ul(&clp->cl_stateids, &id); | |
2564 | *pos = id; | |
2565 | return ret; | |
2566 | } | |
2567 | ||
2568 | static void states_stop(struct seq_file *s, void *v) | |
2569 | __releases(&clp->cl_lock) | |
2570 | { | |
2571 | struct nfs4_client *clp = s->private; | |
2572 | ||
2573 | spin_unlock(&clp->cl_lock); | |
2574 | } | |
2575 | ||
580da465 AG |
2576 | static void nfs4_show_fname(struct seq_file *s, struct nfsd_file *f) |
2577 | { | |
2578 | seq_printf(s, "filename: \"%pD2\"", f->nf_file); | |
2579 | } | |
2580 | ||
fd4f83fd | 2581 | static void nfs4_show_superblock(struct seq_file *s, struct nfsd_file *f) |
78599c42 | 2582 | { |
427f5f83 | 2583 | struct inode *inode = file_inode(f->nf_file); |
78599c42 BF |
2584 | |
2585 | seq_printf(s, "superblock: \"%02x:%02x:%ld\"", | |
2586 | MAJOR(inode->i_sb->s_dev), | |
2587 | MINOR(inode->i_sb->s_dev), | |
2588 | inode->i_ino); | |
2589 | } | |
2590 | ||
2591 | static void nfs4_show_owner(struct seq_file *s, struct nfs4_stateowner *oo) | |
2592 | { | |
2593 | seq_printf(s, "owner: "); | |
2594 | seq_quote_mem(s, oo->so_owner.data, oo->so_owner.len); | |
2595 | } | |
2596 | ||
ace7ade4 BF |
2597 | static void nfs4_show_stateid(struct seq_file *s, stateid_t *stid) |
2598 | { | |
ee590d25 BF |
2599 | seq_printf(s, "0x%.8x", stid->si_generation); |
2600 | seq_printf(s, "%12phN", &stid->si_opaque); | |
ace7ade4 BF |
2601 | } |
2602 | ||
78599c42 BF |
2603 | static int nfs4_show_open(struct seq_file *s, struct nfs4_stid *st) |
2604 | { | |
2605 | struct nfs4_ol_stateid *ols; | |
2606 | struct nfs4_file *nf; | |
fd4f83fd | 2607 | struct nfsd_file *file; |
78599c42 BF |
2608 | struct nfs4_stateowner *oo; |
2609 | unsigned int access, deny; | |
2610 | ||
2611 | if (st->sc_type != NFS4_OPEN_STID && st->sc_type != NFS4_LOCK_STID) | |
2612 | return 0; /* XXX: or SEQ_SKIP? */ | |
2613 | ols = openlockstateid(st); | |
2614 | oo = ols->st_stateowner; | |
2615 | nf = st->sc_file; | |
2616 | file = find_any_file(nf); | |
9affa435 BF |
2617 | if (!file) |
2618 | return 0; | |
78599c42 | 2619 | |
ace7ade4 BF |
2620 | seq_printf(s, "- "); |
2621 | nfs4_show_stateid(s, &st->sc_stateid); | |
2622 | seq_printf(s, ": { type: open, "); | |
78599c42 BF |
2623 | |
2624 | access = bmap_to_share_mode(ols->st_access_bmap); | |
2625 | deny = bmap_to_share_mode(ols->st_deny_bmap); | |
2626 | ||
c4b77edb | 2627 | seq_printf(s, "access: %s%s, ", |
78599c42 BF |
2628 | access & NFS4_SHARE_ACCESS_READ ? "r" : "-", |
2629 | access & NFS4_SHARE_ACCESS_WRITE ? "w" : "-"); | |
c4b77edb | 2630 | seq_printf(s, "deny: %s%s, ", |
78599c42 BF |
2631 | deny & NFS4_SHARE_ACCESS_READ ? "r" : "-", |
2632 | deny & NFS4_SHARE_ACCESS_WRITE ? "w" : "-"); | |
2633 | ||
2634 | nfs4_show_superblock(s, file); | |
2635 | seq_printf(s, ", "); | |
580da465 AG |
2636 | nfs4_show_fname(s, file); |
2637 | seq_printf(s, ", "); | |
78599c42 BF |
2638 | nfs4_show_owner(s, oo); |
2639 | seq_printf(s, " }\n"); | |
fd4f83fd | 2640 | nfsd_file_put(file); |
16d36e09 BF |
2641 | |
2642 | return 0; | |
2643 | } | |
2644 | ||
2645 | static int nfs4_show_lock(struct seq_file *s, struct nfs4_stid *st) | |
2646 | { | |
2647 | struct nfs4_ol_stateid *ols; | |
2648 | struct nfs4_file *nf; | |
fd4f83fd | 2649 | struct nfsd_file *file; |
16d36e09 BF |
2650 | struct nfs4_stateowner *oo; |
2651 | ||
2652 | ols = openlockstateid(st); | |
2653 | oo = ols->st_stateowner; | |
2654 | nf = st->sc_file; | |
2655 | file = find_any_file(nf); | |
9affa435 BF |
2656 | if (!file) |
2657 | return 0; | |
16d36e09 | 2658 | |
ace7ade4 BF |
2659 | seq_printf(s, "- "); |
2660 | nfs4_show_stateid(s, &st->sc_stateid); | |
2661 | seq_printf(s, ": { type: lock, "); | |
16d36e09 BF |
2662 | |
2663 | /* | |
2664 | * Note: a lock stateid isn't really the same thing as a lock, | |
2665 | * it's the locking state held by one owner on a file, and there | |
2666 | * may be multiple (or no) lock ranges associated with it. | |
2667 | * (Same for the matter is true of open stateids.) | |
2668 | */ | |
78599c42 | 2669 | |
16d36e09 BF |
2670 | nfs4_show_superblock(s, file); |
2671 | /* XXX: open stateid? */ | |
2672 | seq_printf(s, ", "); | |
580da465 AG |
2673 | nfs4_show_fname(s, file); |
2674 | seq_printf(s, ", "); | |
16d36e09 BF |
2675 | nfs4_show_owner(s, oo); |
2676 | seq_printf(s, " }\n"); | |
fd4f83fd | 2677 | nfsd_file_put(file); |
78599c42 BF |
2678 | |
2679 | return 0; | |
2680 | } | |
2681 | ||
16d36e09 BF |
2682 | static int nfs4_show_deleg(struct seq_file *s, struct nfs4_stid *st) |
2683 | { | |
2684 | struct nfs4_delegation *ds; | |
2685 | struct nfs4_file *nf; | |
eb82dd39 | 2686 | struct nfsd_file *file; |
16d36e09 BF |
2687 | |
2688 | ds = delegstateid(st); | |
2689 | nf = st->sc_file; | |
9affa435 BF |
2690 | file = find_deleg_file(nf); |
2691 | if (!file) | |
2692 | return 0; | |
16d36e09 | 2693 | |
ace7ade4 BF |
2694 | seq_printf(s, "- "); |
2695 | nfs4_show_stateid(s, &st->sc_stateid); | |
2696 | seq_printf(s, ": { type: deleg, "); | |
16d36e09 BF |
2697 | |
2698 | /* Kinda dead code as long as we only support read delegs: */ | |
2699 | seq_printf(s, "access: %s, ", | |
2700 | ds->dl_type == NFS4_OPEN_DELEGATE_READ ? "r" : "w"); | |
2701 | ||
2702 | /* XXX: lease time, whether it's being recalled. */ | |
2703 | ||
2704 | nfs4_show_superblock(s, file); | |
580da465 AG |
2705 | seq_printf(s, ", "); |
2706 | nfs4_show_fname(s, file); | |
16d36e09 | 2707 | seq_printf(s, " }\n"); |
9affa435 | 2708 | nfsd_file_put(file); |
16d36e09 BF |
2709 | |
2710 | return 0; | |
2711 | } | |
2712 | ||
0c4b62b0 BF |
2713 | static int nfs4_show_layout(struct seq_file *s, struct nfs4_stid *st) |
2714 | { | |
2715 | struct nfs4_layout_stateid *ls; | |
eb82dd39 | 2716 | struct nfsd_file *file; |
0c4b62b0 BF |
2717 | |
2718 | ls = container_of(st, struct nfs4_layout_stateid, ls_stid); | |
2719 | file = ls->ls_file; | |
2720 | ||
ace7ade4 BF |
2721 | seq_printf(s, "- "); |
2722 | nfs4_show_stateid(s, &st->sc_stateid); | |
2723 | seq_printf(s, ": { type: layout, "); | |
0c4b62b0 BF |
2724 | |
2725 | /* XXX: What else would be useful? */ | |
2726 | ||
2727 | nfs4_show_superblock(s, file); | |
580da465 AG |
2728 | seq_printf(s, ", "); |
2729 | nfs4_show_fname(s, file); | |
0c4b62b0 BF |
2730 | seq_printf(s, " }\n"); |
2731 | ||
2732 | return 0; | |
2733 | } | |
2734 | ||
78599c42 BF |
2735 | static int states_show(struct seq_file *s, void *v) |
2736 | { | |
2737 | struct nfs4_stid *st = v; | |
2738 | ||
2739 | switch (st->sc_type) { | |
2740 | case NFS4_OPEN_STID: | |
2741 | return nfs4_show_open(s, st); | |
16d36e09 BF |
2742 | case NFS4_LOCK_STID: |
2743 | return nfs4_show_lock(s, st); | |
2744 | case NFS4_DELEG_STID: | |
2745 | return nfs4_show_deleg(s, st); | |
0c4b62b0 BF |
2746 | case NFS4_LAYOUT_STID: |
2747 | return nfs4_show_layout(s, st); | |
78599c42 BF |
2748 | default: |
2749 | return 0; /* XXX: or SEQ_SKIP? */ | |
2750 | } | |
16d36e09 | 2751 | /* XXX: copy stateids? */ |
78599c42 BF |
2752 | } |
2753 | ||
2754 | static struct seq_operations states_seq_ops = { | |
2755 | .start = states_start, | |
2756 | .next = states_next, | |
2757 | .stop = states_stop, | |
2758 | .show = states_show | |
2759 | }; | |
2760 | ||
2761 | static int client_states_open(struct inode *inode, struct file *file) | |
2762 | { | |
78599c42 BF |
2763 | struct seq_file *s; |
2764 | struct nfs4_client *clp; | |
2765 | int ret; | |
2766 | ||
a204f25e BF |
2767 | clp = get_nfsdfs_clp(inode); |
2768 | if (!clp) | |
78599c42 | 2769 | return -ENXIO; |
78599c42 BF |
2770 | |
2771 | ret = seq_open(file, &states_seq_ops); | |
2772 | if (ret) | |
2773 | return ret; | |
2774 | s = file->private_data; | |
2775 | s->private = clp; | |
2776 | return 0; | |
2777 | } | |
2778 | ||
2779 | static int client_opens_release(struct inode *inode, struct file *file) | |
2780 | { | |
2781 | struct seq_file *m = file->private_data; | |
2782 | struct nfs4_client *clp = m->private; | |
2783 | ||
2784 | /* XXX: alternatively, we could get/drop in seq start/stop */ | |
2785 | drop_client(clp); | |
2786 | return 0; | |
2787 | } | |
2788 | ||
2789 | static const struct file_operations client_states_fops = { | |
2790 | .open = client_states_open, | |
2791 | .read = seq_read, | |
2792 | .llseek = seq_lseek, | |
2793 | .release = client_opens_release, | |
2794 | }; | |
2795 | ||
89c905be BF |
2796 | /* |
2797 | * Normally we refuse to destroy clients that are in use, but here the | |
2798 | * administrator is telling us to just do it. We also want to wait | |
2799 | * so the caller has a guarantee that the client's locks are gone by | |
2800 | * the time the write returns: | |
2801 | */ | |
297e57a2 | 2802 | static void force_expire_client(struct nfs4_client *clp) |
89c905be BF |
2803 | { |
2804 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
2805 | bool already_expired; | |
2806 | ||
2958d2ee CL |
2807 | trace_nfsd_clid_admin_expired(&clp->cl_clientid); |
2808 | ||
f7104cc1 | 2809 | spin_lock(&nn->client_lock); |
89c905be | 2810 | clp->cl_time = 0; |
f7104cc1 | 2811 | spin_unlock(&nn->client_lock); |
89c905be BF |
2812 | |
2813 | wait_event(expiry_wq, atomic_read(&clp->cl_rpc_users) == 0); | |
2814 | spin_lock(&nn->client_lock); | |
2815 | already_expired = list_empty(&clp->cl_lru); | |
2816 | if (!already_expired) | |
2817 | unhash_client_locked(clp); | |
2818 | spin_unlock(&nn->client_lock); | |
2819 | ||
2820 | if (!already_expired) | |
2821 | expire_client(clp); | |
2822 | else | |
2823 | wait_event(expiry_wq, clp->cl_nfsd_dentry == NULL); | |
2824 | } | |
2825 | ||
2826 | static ssize_t client_ctl_write(struct file *file, const char __user *buf, | |
2827 | size_t size, loff_t *pos) | |
2828 | { | |
2829 | char *data; | |
2830 | struct nfs4_client *clp; | |
2831 | ||
2832 | data = simple_transaction_get(file, buf, size); | |
2833 | if (IS_ERR(data)) | |
2834 | return PTR_ERR(data); | |
2835 | if (size != 7 || 0 != memcmp(data, "expire\n", 7)) | |
2836 | return -EINVAL; | |
2837 | clp = get_nfsdfs_clp(file_inode(file)); | |
2838 | if (!clp) | |
2839 | return -ENXIO; | |
2840 | force_expire_client(clp); | |
2841 | drop_client(clp); | |
2842 | return 7; | |
2843 | } | |
2844 | ||
2845 | static const struct file_operations client_ctl_fops = { | |
2846 | .write = client_ctl_write, | |
2847 | .release = simple_transaction_release, | |
2848 | }; | |
2849 | ||
97ad4031 BF |
2850 | static const struct tree_descr client_files[] = { |
2851 | [0] = {"info", &client_info_fops, S_IRUSR}, | |
78599c42 | 2852 | [1] = {"states", &client_states_fops, S_IRUSR}, |
6cbfad5f | 2853 | [2] = {"ctl", &client_ctl_fops, S_IWUSR}, |
78599c42 | 2854 | [3] = {""}, |
97ad4031 BF |
2855 | }; |
2856 | ||
2216d449 | 2857 | static struct nfs4_client *create_client(struct xdr_netobj name, |
b09333c4 RL |
2858 | struct svc_rqst *rqstp, nfs4_verifier *verf) |
2859 | { | |
2860 | struct nfs4_client *clp; | |
2861 | struct sockaddr *sa = svc_addr(rqstp); | |
03a4e1f6 | 2862 | int ret; |
c212cecf | 2863 | struct net *net = SVC_NET(rqstp); |
e8a79fb1 | 2864 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
472d155a | 2865 | struct dentry *dentries[ARRAY_SIZE(client_files)]; |
b09333c4 | 2866 | |
0926c395 | 2867 | clp = alloc_client(name, nn); |
b09333c4 RL |
2868 | if (clp == NULL) |
2869 | return NULL; | |
2870 | ||
03a4e1f6 BF |
2871 | ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); |
2872 | if (ret) { | |
03a4e1f6 | 2873 | free_client(clp); |
03a4e1f6 | 2874 | return NULL; |
b09333c4 | 2875 | } |
e8a79fb1 BF |
2876 | gen_clid(clp, nn); |
2877 | kref_init(&clp->cl_nfsdfs.cl_ref); | |
0162ac2b | 2878 | nfsd4_init_cb(&clp->cl_cb_null, clp, NULL, NFSPROC4_CLNT_CB_NULL); |
20b7d86f | 2879 | clp->cl_time = ktime_get_boottime_seconds(); |
b09333c4 | 2880 | clear_bit(0, &clp->cl_cb_slot_busy); |
b09333c4 | 2881 | copy_verf(clp, verf); |
3bade247 | 2882 | memcpy(&clp->cl_addr, sa, sizeof(struct sockaddr_storage)); |
edd76786 | 2883 | clp->cl_cb_session = NULL; |
c212cecf | 2884 | clp->net = net; |
472d155a N |
2885 | clp->cl_nfsd_dentry = nfsd_client_mkdir( |
2886 | nn, &clp->cl_nfsdfs, | |
2887 | clp->cl_clientid.cl_id - nn->clientid_base, | |
2888 | client_files, dentries); | |
2889 | clp->cl_nfsd_info_dentry = dentries[0]; | |
e8a79fb1 BF |
2890 | if (!clp->cl_nfsd_dentry) { |
2891 | free_client(clp); | |
2892 | return NULL; | |
2893 | } | |
b09333c4 RL |
2894 | return clp; |
2895 | } | |
2896 | ||
fd39ca9a | 2897 | static void |
ac55fdc4 JL |
2898 | add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root) |
2899 | { | |
2900 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
2901 | struct nfs4_client *clp; | |
2902 | ||
2903 | while (*new) { | |
2904 | clp = rb_entry(*new, struct nfs4_client, cl_namenode); | |
2905 | parent = *new; | |
2906 | ||
2907 | if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0) | |
2908 | new = &((*new)->rb_left); | |
2909 | else | |
2910 | new = &((*new)->rb_right); | |
2911 | } | |
2912 | ||
2913 | rb_link_node(&new_clp->cl_namenode, parent, new); | |
2914 | rb_insert_color(&new_clp->cl_namenode, root); | |
2915 | } | |
2916 | ||
2917 | static struct nfs4_client * | |
2918 | find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root) | |
2919 | { | |
ef17af2a | 2920 | int cmp; |
ac55fdc4 JL |
2921 | struct rb_node *node = root->rb_node; |
2922 | struct nfs4_client *clp; | |
2923 | ||
2924 | while (node) { | |
2925 | clp = rb_entry(node, struct nfs4_client, cl_namenode); | |
2926 | cmp = compare_blob(&clp->cl_name, name); | |
2927 | if (cmp > 0) | |
2928 | node = node->rb_left; | |
2929 | else if (cmp < 0) | |
2930 | node = node->rb_right; | |
2931 | else | |
2932 | return clp; | |
2933 | } | |
2934 | return NULL; | |
2935 | } | |
2936 | ||
2937 | static void | |
2938 | add_to_unconfirmed(struct nfs4_client *clp) | |
1da177e4 LT |
2939 | { |
2940 | unsigned int idhashval; | |
0a7ec377 | 2941 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 2942 | |
0a880a28 TM |
2943 | lockdep_assert_held(&nn->client_lock); |
2944 | ||
ac55fdc4 | 2945 | clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
a99454aa | 2946 | add_clp_to_name_tree(clp, &nn->unconf_name_tree); |
1da177e4 | 2947 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
0a7ec377 | 2948 | list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]); |
3dbacee6 | 2949 | renew_client_locked(clp); |
1da177e4 LT |
2950 | } |
2951 | ||
fd39ca9a | 2952 | static void |
1da177e4 LT |
2953 | move_to_confirmed(struct nfs4_client *clp) |
2954 | { | |
2955 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
8daae4dc | 2956 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 2957 | |
0a880a28 TM |
2958 | lockdep_assert_held(&nn->client_lock); |
2959 | ||
8daae4dc | 2960 | list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]); |
a99454aa | 2961 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
382a62e7 | 2962 | add_clp_to_name_tree(clp, &nn->conf_name_tree); |
934bd07f BF |
2963 | set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
2964 | trace_nfsd_clid_confirmed(&clp->cl_clientid); | |
3dbacee6 | 2965 | renew_client_locked(clp); |
1da177e4 LT |
2966 | } |
2967 | ||
2968 | static struct nfs4_client * | |
bfa85e83 | 2969 | find_client_in_id_table(struct list_head *tbl, clientid_t *clid, bool sessions) |
1da177e4 LT |
2970 | { |
2971 | struct nfs4_client *clp; | |
2972 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
2973 | ||
bfa85e83 | 2974 | list_for_each_entry(clp, &tbl[idhashval], cl_idhash) { |
a50d2ad1 | 2975 | if (same_clid(&clp->cl_clientid, clid)) { |
d15c077e BF |
2976 | if ((bool)clp->cl_minorversion != sessions) |
2977 | return NULL; | |
3dbacee6 | 2978 | renew_client_locked(clp); |
1da177e4 | 2979 | return clp; |
a50d2ad1 | 2980 | } |
1da177e4 LT |
2981 | } |
2982 | return NULL; | |
2983 | } | |
2984 | ||
bfa85e83 BF |
2985 | static struct nfs4_client * |
2986 | find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) | |
2987 | { | |
2988 | struct list_head *tbl = nn->conf_id_hashtbl; | |
2989 | ||
0a880a28 | 2990 | lockdep_assert_held(&nn->client_lock); |
bfa85e83 BF |
2991 | return find_client_in_id_table(tbl, clid, sessions); |
2992 | } | |
2993 | ||
1da177e4 | 2994 | static struct nfs4_client * |
0a7ec377 | 2995 | find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
1da177e4 | 2996 | { |
bfa85e83 | 2997 | struct list_head *tbl = nn->unconf_id_hashtbl; |
1da177e4 | 2998 | |
0a880a28 | 2999 | lockdep_assert_held(&nn->client_lock); |
bfa85e83 | 3000 | return find_client_in_id_table(tbl, clid, sessions); |
1da177e4 LT |
3001 | } |
3002 | ||
6e5f15c9 | 3003 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 3004 | { |
6e5f15c9 | 3005 | return clp->cl_exchange_flags != 0; |
e203d506 | 3006 | } |
a1bcecd2 | 3007 | |
28ce6054 | 3008 | static struct nfs4_client * |
382a62e7 | 3009 | find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 3010 | { |
0a880a28 | 3011 | lockdep_assert_held(&nn->client_lock); |
382a62e7 | 3012 | return find_clp_in_name_tree(name, &nn->conf_name_tree); |
28ce6054 N |
3013 | } |
3014 | ||
3015 | static struct nfs4_client * | |
a99454aa | 3016 | find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 3017 | { |
0a880a28 | 3018 | lockdep_assert_held(&nn->client_lock); |
a99454aa | 3019 | return find_clp_in_name_tree(name, &nn->unconf_name_tree); |
28ce6054 N |
3020 | } |
3021 | ||
fd39ca9a | 3022 | static void |
6f3d772f | 3023 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 3024 | { |
07263f1e | 3025 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
3026 | struct sockaddr *sa = svc_addr(rqstp); |
3027 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
3028 | unsigned short expected_family; |
3029 | ||
3030 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
3031 | if (se->se_callback_netid_len == 3 && | |
3032 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
3033 | expected_family = AF_INET; | |
3034 | else if (se->se_callback_netid_len == 4 && | |
3035 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
3036 | expected_family = AF_INET6; | |
3037 | else | |
1da177e4 LT |
3038 | goto out_err; |
3039 | ||
c212cecf | 3040 | conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val, |
aa9a4ec7 | 3041 | se->se_callback_addr_len, |
07263f1e BF |
3042 | (struct sockaddr *)&conn->cb_addr, |
3043 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 3044 | |
07263f1e | 3045 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 3046 | goto out_err; |
aa9a4ec7 | 3047 | |
07263f1e BF |
3048 | if (conn->cb_addr.ss_family == AF_INET6) |
3049 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 3050 | |
07263f1e BF |
3051 | conn->cb_prog = se->se_callback_prog; |
3052 | conn->cb_ident = se->se_callback_ident; | |
849a1cf1 | 3053 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
1eace0d1 | 3054 | trace_nfsd_cb_args(clp, conn); |
1da177e4 LT |
3055 | return; |
3056 | out_err: | |
07263f1e BF |
3057 | conn->cb_addr.ss_family = AF_UNSPEC; |
3058 | conn->cb_addrlen = 0; | |
1eace0d1 | 3059 | trace_nfsd_cb_nodelegs(clp); |
1da177e4 LT |
3060 | return; |
3061 | } | |
3062 | ||
074fe897 | 3063 | /* |
067e1ace | 3064 | * Cache a reply. nfsd4_check_resp_size() has bounded the cache size. |
074fe897 | 3065 | */ |
b607664e | 3066 | static void |
074fe897 | 3067 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) |
074fe897 | 3068 | { |
bddfdbcd | 3069 | struct xdr_buf *buf = resp->xdr->buf; |
557ce264 AA |
3070 | struct nfsd4_slot *slot = resp->cstate.slot; |
3071 | unsigned int base; | |
074fe897 | 3072 | |
557ce264 | 3073 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 3074 | |
085def3a | 3075 | slot->sl_flags |= NFSD4_SLOT_INITIALIZED; |
557ce264 AA |
3076 | slot->sl_opcnt = resp->opcnt; |
3077 | slot->sl_status = resp->cstate.status; | |
53da6a53 BF |
3078 | free_svc_cred(&slot->sl_cred); |
3079 | copy_cred(&slot->sl_cred, &resp->rqstp->rq_cred); | |
074fe897 | 3080 | |
085def3a BF |
3081 | if (!nfsd4_cache_this(resp)) { |
3082 | slot->sl_flags &= ~NFSD4_SLOT_CACHED; | |
bf864a31 | 3083 | return; |
074fe897 | 3084 | } |
085def3a BF |
3085 | slot->sl_flags |= NFSD4_SLOT_CACHED; |
3086 | ||
f5236013 BF |
3087 | base = resp->cstate.data_offset; |
3088 | slot->sl_datalen = buf->len - base; | |
3089 | if (read_bytes_from_xdr_buf(buf, base, slot->sl_data, slot->sl_datalen)) | |
d3f03403 DC |
3090 | WARN(1, "%s: sessions DRC could not cache compound\n", |
3091 | __func__); | |
557ce264 | 3092 | return; |
074fe897 AA |
3093 | } |
3094 | ||
3095 | /* | |
abfabf8c AA |
3096 | * Encode the replay sequence operation from the slot values. |
3097 | * If cachethis is FALSE encode the uncached rep error on the next | |
3098 | * operation which sets resp->p and increments resp->opcnt for | |
3099 | * nfs4svc_encode_compoundres. | |
074fe897 | 3100 | * |
074fe897 | 3101 | */ |
abfabf8c AA |
3102 | static __be32 |
3103 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
3104 | struct nfsd4_compoundres *resp) | |
074fe897 | 3105 | { |
abfabf8c AA |
3106 | struct nfsd4_op *op; |
3107 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 3108 | |
abfabf8c AA |
3109 | /* Encode the replayed sequence operation */ |
3110 | op = &args->ops[resp->opcnt - 1]; | |
3111 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 3112 | |
085def3a BF |
3113 | if (slot->sl_flags & NFSD4_SLOT_CACHED) |
3114 | return op->status; | |
3115 | if (args->opcnt == 1) { | |
3116 | /* | |
3117 | * The original operation wasn't a solo sequence--we | |
3118 | * always cache those--so this retry must not match the | |
3119 | * original: | |
3120 | */ | |
3121 | op->status = nfserr_seq_false_retry; | |
3122 | } else { | |
abfabf8c AA |
3123 | op = &args->ops[resp->opcnt++]; |
3124 | op->status = nfserr_retry_uncached_rep; | |
3125 | nfsd4_encode_operation(resp, op); | |
074fe897 | 3126 | } |
abfabf8c | 3127 | return op->status; |
074fe897 AA |
3128 | } |
3129 | ||
3130 | /* | |
557ce264 AA |
3131 | * The sequence operation is not cached because we can use the slot and |
3132 | * session values. | |
074fe897 | 3133 | */ |
3ca2eb98 | 3134 | static __be32 |
bf864a31 AA |
3135 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
3136 | struct nfsd4_sequence *seq) | |
074fe897 | 3137 | { |
557ce264 | 3138 | struct nfsd4_slot *slot = resp->cstate.slot; |
bddfdbcd | 3139 | struct xdr_stream *xdr = resp->xdr; |
f5236013 | 3140 | __be32 *p; |
074fe897 AA |
3141 | __be32 status; |
3142 | ||
557ce264 | 3143 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 3144 | |
abfabf8c | 3145 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); |
0da7b19c | 3146 | if (status) |
abfabf8c | 3147 | return status; |
074fe897 | 3148 | |
f5236013 BF |
3149 | p = xdr_reserve_space(xdr, slot->sl_datalen); |
3150 | if (!p) { | |
3151 | WARN_ON_ONCE(1); | |
3152 | return nfserr_serverfault; | |
3153 | } | |
3154 | xdr_encode_opaque_fixed(p, slot->sl_data, slot->sl_datalen); | |
3155 | xdr_commit_encode(xdr); | |
074fe897 | 3156 | |
557ce264 | 3157 | resp->opcnt = slot->sl_opcnt; |
f5236013 | 3158 | return slot->sl_status; |
074fe897 AA |
3159 | } |
3160 | ||
0733d213 AA |
3161 | /* |
3162 | * Set the exchange_id flags returned by the server. | |
3163 | */ | |
3164 | static void | |
3165 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
3166 | { | |
9cf514cc CH |
3167 | #ifdef CONFIG_NFSD_PNFS |
3168 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_PNFS_MDS; | |
3169 | #else | |
0733d213 | 3170 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; |
9cf514cc | 3171 | #endif |
0733d213 AA |
3172 | |
3173 | /* Referrals are supported, Migration is not. */ | |
3174 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
3175 | ||
3176 | /* set the wire flags to return to client. */ | |
3177 | clid->flags = new->cl_exchange_flags; | |
3178 | } | |
3179 | ||
4eaea134 BF |
3180 | static bool client_has_openowners(struct nfs4_client *clp) |
3181 | { | |
3182 | struct nfs4_openowner *oo; | |
3183 | ||
3184 | list_for_each_entry(oo, &clp->cl_openowners, oo_perclient) { | |
3185 | if (!list_empty(&oo->oo_owner.so_stateids)) | |
3186 | return true; | |
3187 | } | |
3188 | return false; | |
3189 | } | |
3190 | ||
631fc9ea BF |
3191 | static bool client_has_state(struct nfs4_client *clp) |
3192 | { | |
4eaea134 | 3193 | return client_has_openowners(clp) |
47e970be KM |
3194 | #ifdef CONFIG_NFSD_PNFS |
3195 | || !list_empty(&clp->cl_lo_states) | |
3196 | #endif | |
6eccece9 | 3197 | || !list_empty(&clp->cl_delegations) |
e0639dc5 OK |
3198 | || !list_empty(&clp->cl_sessions) |
3199 | || !list_empty(&clp->async_copies); | |
631fc9ea BF |
3200 | } |
3201 | ||
79123444 BF |
3202 | static __be32 copy_impl_id(struct nfs4_client *clp, |
3203 | struct nfsd4_exchange_id *exid) | |
3204 | { | |
3205 | if (!exid->nii_domain.data) | |
3206 | return 0; | |
3207 | xdr_netobj_dup(&clp->cl_nii_domain, &exid->nii_domain, GFP_KERNEL); | |
3208 | if (!clp->cl_nii_domain.data) | |
3209 | return nfserr_jukebox; | |
3210 | xdr_netobj_dup(&clp->cl_nii_name, &exid->nii_name, GFP_KERNEL); | |
3211 | if (!clp->cl_nii_name.data) | |
3212 | return nfserr_jukebox; | |
e29f4703 | 3213 | clp->cl_nii_time = exid->nii_time; |
79123444 BF |
3214 | return 0; |
3215 | } | |
3216 | ||
069b6ad4 | 3217 | __be32 |
eb69853d CH |
3218 | nfsd4_exchange_id(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3219 | union nfsd4_op_u *u) | |
069b6ad4 | 3220 | { |
eb69853d | 3221 | struct nfsd4_exchange_id *exid = &u->exchange_id; |
3dbacee6 TM |
3222 | struct nfs4_client *conf, *new; |
3223 | struct nfs4_client *unconf = NULL; | |
57b7b43b | 3224 | __be32 status; |
363168b4 | 3225 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 3226 | nfs4_verifier verf = exid->verifier; |
363168b4 | 3227 | struct sockaddr *sa = svc_addr(rqstp); |
83e08fd4 | 3228 | bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; |
c212cecf | 3229 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
0733d213 | 3230 | |
363168b4 | 3231 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 3232 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
523ec6ed | 3233 | "ip_addr=%s flags %x, spa_how %u\n", |
0733d213 | 3234 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 3235 | addr_str, exid->flags, exid->spa_how); |
0733d213 | 3236 | |
a084daf5 | 3237 | if (exid->flags & ~EXCHGID4_FLAG_MASK_A) |
0733d213 AA |
3238 | return nfserr_inval; |
3239 | ||
50c7b948 BF |
3240 | new = create_client(exid->clname, rqstp, &verf); |
3241 | if (new == NULL) | |
3242 | return nfserr_jukebox; | |
79123444 BF |
3243 | status = copy_impl_id(new, exid); |
3244 | if (status) | |
3245 | goto out_nolock; | |
50c7b948 | 3246 | |
0733d213 | 3247 | switch (exid->spa_how) { |
57266a6e | 3248 | case SP4_MACH_CRED: |
ed941643 AE |
3249 | exid->spo_must_enforce[0] = 0; |
3250 | exid->spo_must_enforce[1] = ( | |
3251 | 1 << (OP_BIND_CONN_TO_SESSION - 32) | | |
3252 | 1 << (OP_EXCHANGE_ID - 32) | | |
3253 | 1 << (OP_CREATE_SESSION - 32) | | |
3254 | 1 << (OP_DESTROY_SESSION - 32) | | |
3255 | 1 << (OP_DESTROY_CLIENTID - 32)); | |
3256 | ||
3257 | exid->spo_must_allow[0] &= (1 << (OP_CLOSE) | | |
3258 | 1 << (OP_OPEN_DOWNGRADE) | | |
3259 | 1 << (OP_LOCKU) | | |
3260 | 1 << (OP_DELEGRETURN)); | |
3261 | ||
3262 | exid->spo_must_allow[1] &= ( | |
3263 | 1 << (OP_TEST_STATEID - 32) | | |
3264 | 1 << (OP_FREE_STATEID - 32)); | |
50c7b948 BF |
3265 | if (!svc_rqst_integrity_protected(rqstp)) { |
3266 | status = nfserr_inval; | |
3267 | goto out_nolock; | |
920dd9bb BF |
3268 | } |
3269 | /* | |
3270 | * Sometimes userspace doesn't give us a principal. | |
3271 | * Which is a bug, really. Anyway, we can't enforce | |
3272 | * MACH_CRED in that case, better to give up now: | |
3273 | */ | |
414ca017 BF |
3274 | if (!new->cl_cred.cr_principal && |
3275 | !new->cl_cred.cr_raw_principal) { | |
920dd9bb BF |
3276 | status = nfserr_serverfault; |
3277 | goto out_nolock; | |
50c7b948 BF |
3278 | } |
3279 | new->cl_mach_cred = true; | |
76c50eb7 | 3280 | break; |
0733d213 AA |
3281 | case SP4_NONE: |
3282 | break; | |
063b0fb9 BF |
3283 | default: /* checked by xdr code */ |
3284 | WARN_ON_ONCE(1); | |
df561f66 | 3285 | fallthrough; |
0733d213 | 3286 | case SP4_SSV: |
8edf4b02 KM |
3287 | status = nfserr_encr_alg_unsupp; |
3288 | goto out_nolock; | |
0733d213 AA |
3289 | } |
3290 | ||
2dbb269d | 3291 | /* Cases below refer to rfc 5661 section 18.35.4: */ |
3dbacee6 | 3292 | spin_lock(&nn->client_lock); |
382a62e7 | 3293 | conf = find_confirmed_client_by_name(&exid->clname, nn); |
0733d213 | 3294 | if (conf) { |
83e08fd4 BF |
3295 | bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); |
3296 | bool verfs_match = same_verf(&verf, &conf->cl_verifier); | |
3297 | ||
136e658d BF |
3298 | if (update) { |
3299 | if (!clp_used_exchangeid(conf)) { /* buggy client */ | |
2dbb269d | 3300 | status = nfserr_inval; |
1a308118 BF |
3301 | goto out; |
3302 | } | |
dedeb13f | 3303 | if (!nfsd4_mach_creds_match(conf, rqstp)) { |
57266a6e BF |
3304 | status = nfserr_wrong_cred; |
3305 | goto out; | |
3306 | } | |
136e658d | 3307 | if (!creds_match) { /* case 9 */ |
ea236d07 | 3308 | status = nfserr_perm; |
136e658d BF |
3309 | goto out; |
3310 | } | |
3311 | if (!verfs_match) { /* case 8 */ | |
0733d213 AA |
3312 | status = nfserr_not_same; |
3313 | goto out; | |
3314 | } | |
136e658d BF |
3315 | /* case 6 */ |
3316 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
e8f80c55 | 3317 | trace_nfsd_clid_confirmed_r(conf); |
136e658d | 3318 | goto out_copy; |
0733d213 | 3319 | } |
136e658d | 3320 | if (!creds_match) { /* case 3 */ |
631fc9ea BF |
3321 | if (client_has_state(conf)) { |
3322 | status = nfserr_clid_inuse; | |
27787733 | 3323 | trace_nfsd_clid_cred_mismatch(conf, rqstp); |
0733d213 AA |
3324 | goto out; |
3325 | } | |
0733d213 AA |
3326 | goto out_new; |
3327 | } | |
136e658d | 3328 | if (verfs_match) { /* case 2 */ |
0f1ba0ef | 3329 | conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; |
e8f80c55 | 3330 | trace_nfsd_clid_confirmed_r(conf); |
136e658d BF |
3331 | goto out_copy; |
3332 | } | |
3333 | /* case 5, client reboot */ | |
744ea54c | 3334 | trace_nfsd_clid_verf_mismatch(conf, rqstp, &verf); |
3dbacee6 | 3335 | conf = NULL; |
136e658d | 3336 | goto out_new; |
6ddbbbfe MS |
3337 | } |
3338 | ||
2dbb269d | 3339 | if (update) { /* case 7 */ |
6ddbbbfe MS |
3340 | status = nfserr_noent; |
3341 | goto out; | |
0733d213 AA |
3342 | } |
3343 | ||
e8f80c55 | 3344 | unconf = find_unconfirmed_client_by_name(&exid->clname, nn); |
2dbb269d | 3345 | if (unconf) /* case 4, possible retry or client restart */ |
3dbacee6 | 3346 | unhash_client_locked(unconf); |
0733d213 | 3347 | |
e8f80c55 CL |
3348 | /* case 1, new owner ID */ |
3349 | trace_nfsd_clid_fresh(new); | |
3350 | ||
0733d213 | 3351 | out_new: |
fd699b8a JL |
3352 | if (conf) { |
3353 | status = mark_client_expired_locked(conf); | |
3354 | if (status) | |
3355 | goto out; | |
2958d2ee | 3356 | trace_nfsd_clid_replaced(&conf->cl_clientid); |
fd699b8a | 3357 | } |
4f540e29 | 3358 | new->cl_minorversion = cstate->minorversion; |
ed941643 AE |
3359 | new->cl_spo_must_allow.u.words[0] = exid->spo_must_allow[0]; |
3360 | new->cl_spo_must_allow.u.words[1] = exid->spo_must_allow[1]; | |
0733d213 | 3361 | |
ac55fdc4 | 3362 | add_to_unconfirmed(new); |
3dbacee6 | 3363 | swap(new, conf); |
0733d213 | 3364 | out_copy: |
5cc40fd7 TM |
3365 | exid->clientid.cl_boot = conf->cl_clientid.cl_boot; |
3366 | exid->clientid.cl_id = conf->cl_clientid.cl_id; | |
0733d213 | 3367 | |
5cc40fd7 TM |
3368 | exid->seqid = conf->cl_cs_slot.sl_seqid + 1; |
3369 | nfsd4_set_ex_flags(conf, exid); | |
0733d213 AA |
3370 | |
3371 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
5cc40fd7 | 3372 | conf->cl_cs_slot.sl_seqid, conf->cl_exchange_flags); |
0733d213 AA |
3373 | status = nfs_ok; |
3374 | ||
3375 | out: | |
3dbacee6 | 3376 | spin_unlock(&nn->client_lock); |
50c7b948 | 3377 | out_nolock: |
5cc40fd7 | 3378 | if (new) |
3dbacee6 | 3379 | expire_client(new); |
e8f80c55 CL |
3380 | if (unconf) { |
3381 | trace_nfsd_clid_expire_unconf(&unconf->cl_clientid); | |
3dbacee6 | 3382 | expire_client(unconf); |
e8f80c55 | 3383 | } |
0733d213 | 3384 | return status; |
069b6ad4 AA |
3385 | } |
3386 | ||
57b7b43b | 3387 | static __be32 |
88e588d5 | 3388 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 3389 | { |
88e588d5 AA |
3390 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
3391 | slot_seqid); | |
b85d4c01 BH |
3392 | |
3393 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
3394 | if (slot_inuse) { |
3395 | if (seqid == slot_seqid) | |
b85d4c01 BH |
3396 | return nfserr_jukebox; |
3397 | else | |
3398 | return nfserr_seq_misordered; | |
3399 | } | |
f6d82485 | 3400 | /* Note unsigned 32-bit arithmetic handles wraparound: */ |
88e588d5 | 3401 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 | 3402 | return nfs_ok; |
88e588d5 | 3403 | if (seqid == slot_seqid) |
b85d4c01 | 3404 | return nfserr_replay_cache; |
b85d4c01 BH |
3405 | return nfserr_seq_misordered; |
3406 | } | |
3407 | ||
49557cc7 AA |
3408 | /* |
3409 | * Cache the create session result into the create session single DRC | |
3410 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
3411 | * Do this for solo or embedded create session operations. | |
3412 | */ | |
3413 | static void | |
3414 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
57b7b43b | 3415 | struct nfsd4_clid_slot *slot, __be32 nfserr) |
49557cc7 AA |
3416 | { |
3417 | slot->sl_status = nfserr; | |
3418 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
3419 | } | |
3420 | ||
3421 | static __be32 | |
3422 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
3423 | struct nfsd4_clid_slot *slot) | |
3424 | { | |
3425 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
3426 | return slot->sl_status; | |
3427 | } | |
3428 | ||
1b74c25b MJ |
3429 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
3430 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
3431 | 1 + /* MIN tag is length with zero, only length */ \ | |
3432 | 3 + /* version, opcount, opcode */ \ | |
3433 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
3434 | /* seqid, slotID, slotID, cache */ \ | |
3435 | 4 ) * sizeof(__be32)) | |
3436 | ||
3437 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
3438 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
3439 | 1 + /* status */ \ | |
3440 | 1 + /* MIN tag is length with zero, only length */ \ | |
3441 | 3 + /* opcount, opcode, opstatus*/ \ | |
3442 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
3443 | /* seqid, slotID, slotID, slotID, status */ \ | |
3444 | 5 ) * sizeof(__be32)) | |
3445 | ||
55c760cf | 3446 | static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs *ca, struct nfsd_net *nn) |
1b74c25b | 3447 | { |
55c760cf BF |
3448 | u32 maxrpc = nn->nfsd_serv->sv_max_mesg; |
3449 | ||
373cd409 BF |
3450 | if (ca->maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ) |
3451 | return nfserr_toosmall; | |
3452 | if (ca->maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ) | |
3453 | return nfserr_toosmall; | |
55c760cf BF |
3454 | ca->headerpadsz = 0; |
3455 | ca->maxreq_sz = min_t(u32, ca->maxreq_sz, maxrpc); | |
3456 | ca->maxresp_sz = min_t(u32, ca->maxresp_sz, maxrpc); | |
3457 | ca->maxops = min_t(u32, ca->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
3458 | ca->maxresp_cached = min_t(u32, ca->maxresp_cached, | |
3459 | NFSD_SLOT_CACHE_SIZE + NFSD_MIN_HDR_SEQ_SZ); | |
3460 | ca->maxreqs = min_t(u32, ca->maxreqs, NFSD_MAX_SLOTS_PER_SESSION); | |
3461 | /* | |
3462 | * Note decreasing slot size below client's request may make it | |
3463 | * difficult for client to function correctly, whereas | |
3464 | * decreasing the number of slots will (just?) affect | |
3465 | * performance. When short on memory we therefore prefer to | |
3466 | * decrease number of slots instead of their size. Clients that | |
3467 | * request larger slots than they need will get poor results: | |
7f49fd5d N |
3468 | * Note that we always allow at least one slot, because our |
3469 | * accounting is soft and provides no guarantees either way. | |
55c760cf | 3470 | */ |
2030ca56 | 3471 | ca->maxreqs = nfsd4_get_drc_mem(ca, nn); |
55c760cf | 3472 | |
373cd409 | 3473 | return nfs_ok; |
1b74c25b MJ |
3474 | } |
3475 | ||
4500632f CL |
3476 | /* |
3477 | * Server's NFSv4.1 backchannel support is AUTH_SYS-only for now. | |
3478 | * These are based on similar macros in linux/sunrpc/msg_prot.h . | |
3479 | */ | |
3480 | #define RPC_MAX_HEADER_WITH_AUTH_SYS \ | |
3481 | (RPC_CALLHDRSIZE + 2 * (2 + UNX_CALLSLACK)) | |
3482 | ||
3483 | #define RPC_MAX_REPHEADER_WITH_AUTH_SYS \ | |
3484 | (RPC_REPHDRSIZE + (2 + NUL_REPLYSLACK)) | |
3485 | ||
8a891633 | 3486 | #define NFSD_CB_MAX_REQ_SZ ((NFS4_enc_cb_recall_sz + \ |
4500632f | 3487 | RPC_MAX_HEADER_WITH_AUTH_SYS) * sizeof(__be32)) |
8a891633 | 3488 | #define NFSD_CB_MAX_RESP_SZ ((NFS4_dec_cb_recall_sz + \ |
4500632f CL |
3489 | RPC_MAX_REPHEADER_WITH_AUTH_SYS) * \ |
3490 | sizeof(__be32)) | |
8a891633 | 3491 | |
06b332a5 | 3492 | static __be32 check_backchannel_attrs(struct nfsd4_channel_attrs *ca) |
1b74c25b | 3493 | { |
06b332a5 BF |
3494 | ca->headerpadsz = 0; |
3495 | ||
8a891633 | 3496 | if (ca->maxreq_sz < NFSD_CB_MAX_REQ_SZ) |
06b332a5 | 3497 | return nfserr_toosmall; |
8a891633 | 3498 | if (ca->maxresp_sz < NFSD_CB_MAX_RESP_SZ) |
06b332a5 BF |
3499 | return nfserr_toosmall; |
3500 | ca->maxresp_cached = 0; | |
3501 | if (ca->maxops < 2) | |
3502 | return nfserr_toosmall; | |
3503 | ||
3504 | return nfs_ok; | |
1b74c25b MJ |
3505 | } |
3506 | ||
b78724b7 BF |
3507 | static __be32 nfsd4_check_cb_sec(struct nfsd4_cb_sec *cbs) |
3508 | { | |
3509 | switch (cbs->flavor) { | |
3510 | case RPC_AUTH_NULL: | |
3511 | case RPC_AUTH_UNIX: | |
3512 | return nfs_ok; | |
3513 | default: | |
3514 | /* | |
3515 | * GSS case: the spec doesn't allow us to return this | |
3516 | * error. But it also doesn't allow us not to support | |
3517 | * GSS. | |
3518 | * I'd rather this fail hard than return some error the | |
3519 | * client might think it can already handle: | |
3520 | */ | |
3521 | return nfserr_encr_alg_unsupp; | |
3522 | } | |
3523 | } | |
3524 | ||
069b6ad4 AA |
3525 | __be32 |
3526 | nfsd4_create_session(struct svc_rqst *rqstp, | |
eb69853d | 3527 | struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) |
069b6ad4 | 3528 | { |
eb69853d | 3529 | struct nfsd4_create_session *cr_ses = &u->create_session; |
363168b4 | 3530 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 3531 | struct nfs4_client *conf, *unconf; |
d20c11d8 | 3532 | struct nfs4_client *old = NULL; |
ac7c46f2 | 3533 | struct nfsd4_session *new; |
81f0b2a4 | 3534 | struct nfsd4_conn *conn; |
49557cc7 | 3535 | struct nfsd4_clid_slot *cs_slot = NULL; |
57b7b43b | 3536 | __be32 status = 0; |
8daae4dc | 3537 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
ec6b5d7b | 3538 | |
a62573dc MJ |
3539 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
3540 | return nfserr_inval; | |
b78724b7 BF |
3541 | status = nfsd4_check_cb_sec(&cr_ses->cb_sec); |
3542 | if (status) | |
3543 | return status; | |
55c760cf | 3544 | status = check_forechannel_attrs(&cr_ses->fore_channel, nn); |
06b332a5 BF |
3545 | if (status) |
3546 | return status; | |
3547 | status = check_backchannel_attrs(&cr_ses->back_channel); | |
373cd409 | 3548 | if (status) |
f403e450 | 3549 | goto out_release_drc_mem; |
81f0b2a4 | 3550 | status = nfserr_jukebox; |
60810e54 | 3551 | new = alloc_session(&cr_ses->fore_channel, &cr_ses->back_channel); |
55c760cf BF |
3552 | if (!new) |
3553 | goto out_release_drc_mem; | |
81f0b2a4 BF |
3554 | conn = alloc_conn_from_crses(rqstp, cr_ses); |
3555 | if (!conn) | |
3556 | goto out_free_session; | |
a62573dc | 3557 | |
d20c11d8 | 3558 | spin_lock(&nn->client_lock); |
0a7ec377 | 3559 | unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn); |
8daae4dc | 3560 | conf = find_confirmed_client(&cr_ses->clientid, true, nn); |
78389046 | 3561 | WARN_ON_ONCE(conf && unconf); |
ec6b5d7b AA |
3562 | |
3563 | if (conf) { | |
57266a6e | 3564 | status = nfserr_wrong_cred; |
dedeb13f | 3565 | if (!nfsd4_mach_creds_match(conf, rqstp)) |
57266a6e | 3566 | goto out_free_conn; |
49557cc7 AA |
3567 | cs_slot = &conf->cl_cs_slot; |
3568 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
f5e22bb6 KM |
3569 | if (status) { |
3570 | if (status == nfserr_replay_cache) | |
3571 | status = nfsd4_replay_create_session(cr_ses, cs_slot); | |
81f0b2a4 | 3572 | goto out_free_conn; |
ec6b5d7b | 3573 | } |
ec6b5d7b | 3574 | } else if (unconf) { |
27787733 | 3575 | status = nfserr_clid_inuse; |
ec6b5d7b | 3576 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || |
363168b4 | 3577 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
27787733 | 3578 | trace_nfsd_clid_cred_mismatch(unconf, rqstp); |
81f0b2a4 | 3579 | goto out_free_conn; |
ec6b5d7b | 3580 | } |
57266a6e | 3581 | status = nfserr_wrong_cred; |
dedeb13f | 3582 | if (!nfsd4_mach_creds_match(unconf, rqstp)) |
57266a6e | 3583 | goto out_free_conn; |
49557cc7 AA |
3584 | cs_slot = &unconf->cl_cs_slot; |
3585 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
3586 | if (status) { |
3587 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 3588 | status = nfserr_seq_misordered; |
81f0b2a4 | 3589 | goto out_free_conn; |
ec6b5d7b | 3590 | } |
382a62e7 | 3591 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
221a6876 | 3592 | if (old) { |
d20c11d8 | 3593 | status = mark_client_expired_locked(old); |
7abea1e8 JL |
3594 | if (status) { |
3595 | old = NULL; | |
221a6876 | 3596 | goto out_free_conn; |
7abea1e8 | 3597 | } |
2958d2ee | 3598 | trace_nfsd_clid_replaced(&old->cl_clientid); |
221a6876 | 3599 | } |
8f9d3d3b | 3600 | move_to_confirmed(unconf); |
ec6b5d7b AA |
3601 | conf = unconf; |
3602 | } else { | |
3603 | status = nfserr_stale_clientid; | |
81f0b2a4 | 3604 | goto out_free_conn; |
ec6b5d7b | 3605 | } |
81f0b2a4 | 3606 | status = nfs_ok; |
4ce85c8c | 3607 | /* Persistent sessions are not supported */ |
408b79bc | 3608 | cr_ses->flags &= ~SESSION4_PERSIST; |
4ce85c8c | 3609 | /* Upshifting from TCP to RDMA is not supported */ |
408b79bc BF |
3610 | cr_ses->flags &= ~SESSION4_RDMA; |
3611 | ||
81f0b2a4 | 3612 | init_session(rqstp, new, conf, cr_ses); |
d20c11d8 | 3613 | nfsd4_get_session_locked(new); |
81f0b2a4 | 3614 | |
ac7c46f2 | 3615 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, |
ec6b5d7b | 3616 | NFS4_MAX_SESSIONID_LEN); |
86c3e16c | 3617 | cs_slot->sl_seqid++; |
49557cc7 | 3618 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 3619 | |
d20c11d8 | 3620 | /* cache solo and embedded create sessions under the client_lock */ |
49557cc7 | 3621 | nfsd4_cache_create_session(cr_ses, cs_slot, status); |
d20c11d8 | 3622 | spin_unlock(&nn->client_lock); |
934bd07f BF |
3623 | if (conf == unconf) |
3624 | fsnotify_dentry(conf->cl_nfsd_info_dentry, FS_MODIFY); | |
d20c11d8 JL |
3625 | /* init connection and backchannel */ |
3626 | nfsd4_init_conn(rqstp, conn, new); | |
3627 | nfsd4_put_session(new); | |
d20c11d8 JL |
3628 | if (old) |
3629 | expire_client(old); | |
ec6b5d7b | 3630 | return status; |
81f0b2a4 | 3631 | out_free_conn: |
d20c11d8 | 3632 | spin_unlock(&nn->client_lock); |
81f0b2a4 | 3633 | free_conn(conn); |
d20c11d8 JL |
3634 | if (old) |
3635 | expire_client(old); | |
81f0b2a4 BF |
3636 | out_free_session: |
3637 | __free_session(new); | |
55c760cf BF |
3638 | out_release_drc_mem: |
3639 | nfsd4_put_drc_mem(&cr_ses->fore_channel); | |
1ca50792 | 3640 | return status; |
069b6ad4 AA |
3641 | } |
3642 | ||
1d1bc8f2 BF |
3643 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
3644 | { | |
3645 | switch (*dir) { | |
3646 | case NFS4_CDFC4_FORE: | |
3647 | case NFS4_CDFC4_BACK: | |
3648 | return nfs_ok; | |
3649 | case NFS4_CDFC4_FORE_OR_BOTH: | |
3650 | case NFS4_CDFC4_BACK_OR_BOTH: | |
3651 | *dir = NFS4_CDFC4_BOTH; | |
3652 | return nfs_ok; | |
fc5fc5d7 | 3653 | } |
1d1bc8f2 BF |
3654 | return nfserr_inval; |
3655 | } | |
3656 | ||
eb69853d CH |
3657 | __be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, |
3658 | struct nfsd4_compound_state *cstate, | |
3659 | union nfsd4_op_u *u) | |
cb73a9f4 | 3660 | { |
eb69853d | 3661 | struct nfsd4_backchannel_ctl *bc = &u->backchannel_ctl; |
cb73a9f4 | 3662 | struct nfsd4_session *session = cstate->session; |
c9a49628 | 3663 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
b78724b7 | 3664 | __be32 status; |
cb73a9f4 | 3665 | |
b78724b7 BF |
3666 | status = nfsd4_check_cb_sec(&bc->bc_cb_sec); |
3667 | if (status) | |
3668 | return status; | |
c9a49628 | 3669 | spin_lock(&nn->client_lock); |
cb73a9f4 BF |
3670 | session->se_cb_prog = bc->bc_cb_program; |
3671 | session->se_cb_sec = bc->bc_cb_sec; | |
c9a49628 | 3672 | spin_unlock(&nn->client_lock); |
cb73a9f4 BF |
3673 | |
3674 | nfsd4_probe_callback(session->se_client); | |
3675 | ||
3676 | return nfs_ok; | |
3677 | } | |
3678 | ||
c2d715a1 BF |
3679 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
3680 | { | |
3681 | struct nfsd4_conn *c; | |
3682 | ||
3683 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
3684 | if (c->cn_xprt == xpt) { | |
3685 | return c; | |
3686 | } | |
3687 | } | |
3688 | return NULL; | |
3689 | } | |
3690 | ||
3691 | static __be32 nfsd4_match_existing_connection(struct svc_rqst *rqst, | |
02579b2f | 3692 | struct nfsd4_session *session, u32 req, struct nfsd4_conn **conn) |
c2d715a1 BF |
3693 | { |
3694 | struct nfs4_client *clp = session->se_client; | |
3695 | struct svc_xprt *xpt = rqst->rq_xprt; | |
3696 | struct nfsd4_conn *c; | |
3697 | __be32 status; | |
3698 | ||
3699 | /* Following the last paragraph of RFC 5661 Section 18.34.3: */ | |
3700 | spin_lock(&clp->cl_lock); | |
3701 | c = __nfsd4_find_conn(xpt, session); | |
3702 | if (!c) | |
3703 | status = nfserr_noent; | |
3704 | else if (req == c->cn_flags) | |
3705 | status = nfs_ok; | |
3706 | else if (req == NFS4_CDFC4_FORE_OR_BOTH && | |
3707 | c->cn_flags != NFS4_CDFC4_BACK) | |
3708 | status = nfs_ok; | |
3709 | else if (req == NFS4_CDFC4_BACK_OR_BOTH && | |
3710 | c->cn_flags != NFS4_CDFC4_FORE) | |
3711 | status = nfs_ok; | |
3712 | else | |
3713 | status = nfserr_inval; | |
3714 | spin_unlock(&clp->cl_lock); | |
02579b2f DN |
3715 | if (status == nfs_ok && conn) |
3716 | *conn = c; | |
c2d715a1 BF |
3717 | return status; |
3718 | } | |
3719 | ||
1d1bc8f2 BF |
3720 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, |
3721 | struct nfsd4_compound_state *cstate, | |
eb69853d | 3722 | union nfsd4_op_u *u) |
1d1bc8f2 | 3723 | { |
eb69853d | 3724 | struct nfsd4_bind_conn_to_session *bcts = &u->bind_conn_to_session; |
1d1bc8f2 | 3725 | __be32 status; |
3ba63671 | 3726 | struct nfsd4_conn *conn; |
4f6e6c17 | 3727 | struct nfsd4_session *session; |
d4e19e70 TM |
3728 | struct net *net = SVC_NET(rqstp); |
3729 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1d1bc8f2 BF |
3730 | |
3731 | if (!nfsd4_last_compound_op(rqstp)) | |
3732 | return nfserr_not_only_op; | |
c9a49628 | 3733 | spin_lock(&nn->client_lock); |
d4e19e70 | 3734 | session = find_in_sessionid_hashtbl(&bcts->sessionid, net, &status); |
c9a49628 | 3735 | spin_unlock(&nn->client_lock); |
4f6e6c17 | 3736 | if (!session) |
d4e19e70 | 3737 | goto out_no_session; |
57266a6e | 3738 | status = nfserr_wrong_cred; |
dedeb13f | 3739 | if (!nfsd4_mach_creds_match(session->se_client, rqstp)) |
57266a6e | 3740 | goto out; |
02579b2f DN |
3741 | status = nfsd4_match_existing_connection(rqstp, session, |
3742 | bcts->dir, &conn); | |
3743 | if (status == nfs_ok) { | |
3744 | if (bcts->dir == NFS4_CDFC4_FORE_OR_BOTH || | |
3745 | bcts->dir == NFS4_CDFC4_BACK) | |
3746 | conn->cn_flags |= NFS4_CDFC4_BACK; | |
3747 | nfsd4_probe_callback(session->se_client); | |
3748 | goto out; | |
3749 | } | |
3750 | if (status == nfserr_inval) | |
c2d715a1 | 3751 | goto out; |
1d1bc8f2 | 3752 | status = nfsd4_map_bcts_dir(&bcts->dir); |
3ba63671 | 3753 | if (status) |
4f6e6c17 | 3754 | goto out; |
3ba63671 | 3755 | conn = alloc_conn(rqstp, bcts->dir); |
4f6e6c17 | 3756 | status = nfserr_jukebox; |
3ba63671 | 3757 | if (!conn) |
4f6e6c17 BF |
3758 | goto out; |
3759 | nfsd4_init_conn(rqstp, conn, session); | |
3760 | status = nfs_ok; | |
3761 | out: | |
d4e19e70 TM |
3762 | nfsd4_put_session(session); |
3763 | out_no_session: | |
4f6e6c17 | 3764 | return status; |
1d1bc8f2 BF |
3765 | } |
3766 | ||
665d5072 | 3767 | static bool nfsd4_compound_in_session(struct nfsd4_compound_state *cstate, struct nfs4_sessionid *sid) |
5d4cec2f | 3768 | { |
665d5072 | 3769 | if (!cstate->session) |
51d87bc2 | 3770 | return false; |
665d5072 | 3771 | return !memcmp(sid, &cstate->session->se_sessionid, sizeof(*sid)); |
5d4cec2f BF |
3772 | } |
3773 | ||
069b6ad4 | 3774 | __be32 |
eb69853d CH |
3775 | nfsd4_destroy_session(struct svc_rqst *r, struct nfsd4_compound_state *cstate, |
3776 | union nfsd4_op_u *u) | |
069b6ad4 | 3777 | { |
ca0552f4 | 3778 | struct nfs4_sessionid *sessionid = &u->destroy_session.sessionid; |
e10e0cfc | 3779 | struct nfsd4_session *ses; |
abcdff09 | 3780 | __be32 status; |
f0f51f5c | 3781 | int ref_held_by_me = 0; |
d4e19e70 TM |
3782 | struct net *net = SVC_NET(r); |
3783 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
e10e0cfc | 3784 | |
abcdff09 | 3785 | status = nfserr_not_only_op; |
ca0552f4 | 3786 | if (nfsd4_compound_in_session(cstate, sessionid)) { |
57716355 | 3787 | if (!nfsd4_last_compound_op(r)) |
abcdff09 | 3788 | goto out; |
f0f51f5c | 3789 | ref_held_by_me++; |
57716355 | 3790 | } |
ca0552f4 | 3791 | dump_sessionid(__func__, sessionid); |
c9a49628 | 3792 | spin_lock(&nn->client_lock); |
ca0552f4 | 3793 | ses = find_in_sessionid_hashtbl(sessionid, net, &status); |
abcdff09 BF |
3794 | if (!ses) |
3795 | goto out_client_lock; | |
57266a6e | 3796 | status = nfserr_wrong_cred; |
dedeb13f | 3797 | if (!nfsd4_mach_creds_match(ses->se_client, r)) |
d4e19e70 | 3798 | goto out_put_session; |
f0f51f5c | 3799 | status = mark_session_dead_locked(ses, 1 + ref_held_by_me); |
66b2b9b2 | 3800 | if (status) |
f0f51f5c | 3801 | goto out_put_session; |
e10e0cfc | 3802 | unhash_session(ses); |
c9a49628 | 3803 | spin_unlock(&nn->client_lock); |
e10e0cfc | 3804 | |
84f5f7cc | 3805 | nfsd4_probe_callback_sync(ses->se_client); |
19cf5c02 | 3806 | |
c9a49628 | 3807 | spin_lock(&nn->client_lock); |
e10e0cfc | 3808 | status = nfs_ok; |
f0f51f5c | 3809 | out_put_session: |
d4e19e70 | 3810 | nfsd4_put_session_locked(ses); |
abcdff09 BF |
3811 | out_client_lock: |
3812 | spin_unlock(&nn->client_lock); | |
e10e0cfc | 3813 | out: |
e10e0cfc | 3814 | return status; |
069b6ad4 AA |
3815 | } |
3816 | ||
57266a6e | 3817 | static __be32 nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
3818 | { |
3819 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 3820 | struct nfsd4_conn *c; |
57266a6e | 3821 | __be32 status = nfs_ok; |
21b75b01 | 3822 | int ret; |
328ead28 BF |
3823 | |
3824 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 3825 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
57266a6e BF |
3826 | if (c) |
3827 | goto out_free; | |
3828 | status = nfserr_conn_not_bound_to_session; | |
3829 | if (clp->cl_mach_cred) | |
3830 | goto out_free; | |
328ead28 BF |
3831 | __nfsd4_hash_conn(new, ses); |
3832 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
3833 | ret = nfsd4_register_conn(new); |
3834 | if (ret) | |
3835 | /* oops; xprt is already down: */ | |
3836 | nfsd4_conn_lost(&new->cn_xpt_user); | |
57266a6e BF |
3837 | return nfs_ok; |
3838 | out_free: | |
3839 | spin_unlock(&clp->cl_lock); | |
3840 | free_conn(new); | |
3841 | return status; | |
328ead28 BF |
3842 | } |
3843 | ||
868b89c3 MJ |
3844 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
3845 | { | |
3846 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
3847 | ||
3848 | return args->opcnt > session->se_fchannel.maxops; | |
3849 | } | |
3850 | ||
ae82a8d0 MJ |
3851 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
3852 | struct nfsd4_session *session) | |
3853 | { | |
3854 | struct xdr_buf *xb = &rqstp->rq_arg; | |
3855 | ||
3856 | return xb->len > session->se_fchannel.maxreq_sz; | |
3857 | } | |
3858 | ||
53da6a53 BF |
3859 | static bool replay_matches_cache(struct svc_rqst *rqstp, |
3860 | struct nfsd4_sequence *seq, struct nfsd4_slot *slot) | |
3861 | { | |
3862 | struct nfsd4_compoundargs *argp = rqstp->rq_argp; | |
3863 | ||
3864 | if ((bool)(slot->sl_flags & NFSD4_SLOT_CACHETHIS) != | |
3865 | (bool)seq->cachethis) | |
3866 | return false; | |
3867 | /* | |
6e73e92b SM |
3868 | * If there's an error then the reply can have fewer ops than |
3869 | * the call. | |
53da6a53 | 3870 | */ |
6e73e92b SM |
3871 | if (slot->sl_opcnt < argp->opcnt && !slot->sl_status) |
3872 | return false; | |
3873 | /* | |
3874 | * But if we cached a reply with *more* ops than the call you're | |
3875 | * sending us now, then this new call is clearly not really a | |
3876 | * replay of the old one: | |
3877 | */ | |
3878 | if (slot->sl_opcnt > argp->opcnt) | |
53da6a53 BF |
3879 | return false; |
3880 | /* This is the only check explicitly called by spec: */ | |
3881 | if (!same_creds(&rqstp->rq_cred, &slot->sl_cred)) | |
3882 | return false; | |
3883 | /* | |
3884 | * There may be more comparisons we could actually do, but the | |
3885 | * spec doesn't require us to catch every case where the calls | |
3886 | * don't match (that would require caching the call as well as | |
3887 | * the reply), so we don't bother. | |
3888 | */ | |
3889 | return true; | |
3890 | } | |
3891 | ||
069b6ad4 | 3892 | __be32 |
eb69853d CH |
3893 | nfsd4_sequence(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3894 | union nfsd4_op_u *u) | |
069b6ad4 | 3895 | { |
eb69853d | 3896 | struct nfsd4_sequence *seq = &u->sequence; |
f9bb94c4 | 3897 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
bddfdbcd | 3898 | struct xdr_stream *xdr = resp->xdr; |
b85d4c01 | 3899 | struct nfsd4_session *session; |
221a6876 | 3900 | struct nfs4_client *clp; |
b85d4c01 | 3901 | struct nfsd4_slot *slot; |
a663bdd8 | 3902 | struct nfsd4_conn *conn; |
57b7b43b | 3903 | __be32 status; |
47ee5298 | 3904 | int buflen; |
d4e19e70 TM |
3905 | struct net *net = SVC_NET(rqstp); |
3906 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
b85d4c01 | 3907 | |
f9bb94c4 AA |
3908 | if (resp->opcnt != 1) |
3909 | return nfserr_sequence_pos; | |
3910 | ||
a663bdd8 BF |
3911 | /* |
3912 | * Will be either used or freed by nfsd4_sequence_check_conn | |
3913 | * below. | |
3914 | */ | |
3915 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
3916 | if (!conn) | |
3917 | return nfserr_jukebox; | |
3918 | ||
c9a49628 | 3919 | spin_lock(&nn->client_lock); |
d4e19e70 | 3920 | session = find_in_sessionid_hashtbl(&seq->sessionid, net, &status); |
b85d4c01 | 3921 | if (!session) |
221a6876 BF |
3922 | goto out_no_session; |
3923 | clp = session->se_client; | |
b85d4c01 | 3924 | |
868b89c3 MJ |
3925 | status = nfserr_too_many_ops; |
3926 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
66b2b9b2 | 3927 | goto out_put_session; |
868b89c3 | 3928 | |
ae82a8d0 MJ |
3929 | status = nfserr_req_too_big; |
3930 | if (nfsd4_request_too_big(rqstp, session)) | |
66b2b9b2 | 3931 | goto out_put_session; |
ae82a8d0 | 3932 | |
b85d4c01 | 3933 | status = nfserr_badslot; |
6c18ba9f | 3934 | if (seq->slotid >= session->se_fchannel.maxreqs) |
66b2b9b2 | 3935 | goto out_put_session; |
b85d4c01 | 3936 | |
557ce264 | 3937 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
3938 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
3939 | ||
a8dfdaeb AA |
3940 | /* We do not negotiate the number of slots yet, so set the |
3941 | * maxslots to the session maxreqs which is used to encode | |
3942 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
3943 | seq->maxslots = session->se_fchannel.maxreqs; | |
3944 | ||
73e79482 BF |
3945 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, |
3946 | slot->sl_flags & NFSD4_SLOT_INUSE); | |
b85d4c01 | 3947 | if (status == nfserr_replay_cache) { |
bf5c43c8 BF |
3948 | status = nfserr_seq_misordered; |
3949 | if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) | |
66b2b9b2 | 3950 | goto out_put_session; |
53da6a53 BF |
3951 | status = nfserr_seq_false_retry; |
3952 | if (!replay_matches_cache(rqstp, seq, slot)) | |
3953 | goto out_put_session; | |
b85d4c01 BH |
3954 | cstate->slot = slot; |
3955 | cstate->session = session; | |
4b24ca7d | 3956 | cstate->clp = clp; |
da3846a2 | 3957 | /* Return the cached reply status and set cstate->status |
557ce264 | 3958 | * for nfsd4_proc_compound processing */ |
bf864a31 | 3959 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 3960 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 3961 | goto out; |
b85d4c01 BH |
3962 | } |
3963 | if (status) | |
66b2b9b2 | 3964 | goto out_put_session; |
b85d4c01 | 3965 | |
57266a6e | 3966 | status = nfsd4_sequence_check_conn(conn, session); |
a663bdd8 | 3967 | conn = NULL; |
57266a6e BF |
3968 | if (status) |
3969 | goto out_put_session; | |
328ead28 | 3970 | |
47ee5298 BF |
3971 | buflen = (seq->cachethis) ? |
3972 | session->se_fchannel.maxresp_cached : | |
3973 | session->se_fchannel.maxresp_sz; | |
3974 | status = (seq->cachethis) ? nfserr_rep_too_big_to_cache : | |
3975 | nfserr_rep_too_big; | |
a5cddc88 | 3976 | if (xdr_restrict_buflen(xdr, buflen - rqstp->rq_auth_slack)) |
47ee5298 | 3977 | goto out_put_session; |
32aaa62e | 3978 | svc_reserve(rqstp, buflen); |
47ee5298 BF |
3979 | |
3980 | status = nfs_ok; | |
b85d4c01 | 3981 | /* Success! bump slot seqid */ |
b85d4c01 | 3982 | slot->sl_seqid = seq->seqid; |
bf5c43c8 | 3983 | slot->sl_flags |= NFSD4_SLOT_INUSE; |
73e79482 BF |
3984 | if (seq->cachethis) |
3985 | slot->sl_flags |= NFSD4_SLOT_CACHETHIS; | |
bf5c43c8 BF |
3986 | else |
3987 | slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; | |
b85d4c01 BH |
3988 | |
3989 | cstate->slot = slot; | |
3990 | cstate->session = session; | |
4b24ca7d | 3991 | cstate->clp = clp; |
b85d4c01 | 3992 | |
b85d4c01 | 3993 | out: |
221a6876 BF |
3994 | switch (clp->cl_cb_state) { |
3995 | case NFSD4_CB_DOWN: | |
3996 | seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; | |
3997 | break; | |
3998 | case NFSD4_CB_FAULT: | |
3999 | seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; | |
4000 | break; | |
4001 | default: | |
4002 | seq->status_flags = 0; | |
aaf84eb9 | 4003 | } |
3bd64a5b BF |
4004 | if (!list_empty(&clp->cl_revoked)) |
4005 | seq->status_flags |= SEQ4_STATUS_RECALLABLE_STATE_REVOKED; | |
221a6876 | 4006 | out_no_session: |
3f42d2c4 KM |
4007 | if (conn) |
4008 | free_conn(conn); | |
c9a49628 | 4009 | spin_unlock(&nn->client_lock); |
b85d4c01 | 4010 | return status; |
66b2b9b2 | 4011 | out_put_session: |
d4e19e70 | 4012 | nfsd4_put_session_locked(session); |
221a6876 | 4013 | goto out_no_session; |
069b6ad4 AA |
4014 | } |
4015 | ||
b607664e TM |
4016 | void |
4017 | nfsd4_sequence_done(struct nfsd4_compoundres *resp) | |
4018 | { | |
4019 | struct nfsd4_compound_state *cs = &resp->cstate; | |
4020 | ||
4021 | if (nfsd4_has_session(cs)) { | |
b607664e TM |
4022 | if (cs->status != nfserr_replay_cache) { |
4023 | nfsd4_store_cache_entry(resp); | |
4024 | cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE; | |
4025 | } | |
d4e19e70 | 4026 | /* Drop session reference that was taken in nfsd4_sequence() */ |
b607664e | 4027 | nfsd4_put_session(cs->session); |
4b24ca7d JL |
4028 | } else if (cs->clp) |
4029 | put_client_renew(cs->clp); | |
b607664e TM |
4030 | } |
4031 | ||
345c2842 | 4032 | __be32 |
eb69853d CH |
4033 | nfsd4_destroy_clientid(struct svc_rqst *rqstp, |
4034 | struct nfsd4_compound_state *cstate, | |
4035 | union nfsd4_op_u *u) | |
345c2842 | 4036 | { |
eb69853d | 4037 | struct nfsd4_destroy_clientid *dc = &u->destroy_clientid; |
6b10ad19 TM |
4038 | struct nfs4_client *conf, *unconf; |
4039 | struct nfs4_client *clp = NULL; | |
57b7b43b | 4040 | __be32 status = 0; |
8daae4dc | 4041 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
345c2842 | 4042 | |
6b10ad19 | 4043 | spin_lock(&nn->client_lock); |
0a7ec377 | 4044 | unconf = find_unconfirmed_client(&dc->clientid, true, nn); |
8daae4dc | 4045 | conf = find_confirmed_client(&dc->clientid, true, nn); |
78389046 | 4046 | WARN_ON_ONCE(conf && unconf); |
345c2842 MJ |
4047 | |
4048 | if (conf) { | |
c0293b01 | 4049 | if (client_has_state(conf)) { |
345c2842 MJ |
4050 | status = nfserr_clientid_busy; |
4051 | goto out; | |
4052 | } | |
fd699b8a JL |
4053 | status = mark_client_expired_locked(conf); |
4054 | if (status) | |
4055 | goto out; | |
6b10ad19 | 4056 | clp = conf; |
345c2842 MJ |
4057 | } else if (unconf) |
4058 | clp = unconf; | |
4059 | else { | |
4060 | status = nfserr_stale_clientid; | |
4061 | goto out; | |
4062 | } | |
dedeb13f | 4063 | if (!nfsd4_mach_creds_match(clp, rqstp)) { |
6b10ad19 | 4064 | clp = NULL; |
57266a6e BF |
4065 | status = nfserr_wrong_cred; |
4066 | goto out; | |
4067 | } | |
c41a9b7a | 4068 | trace_nfsd_clid_destroyed(&clp->cl_clientid); |
6b10ad19 | 4069 | unhash_client_locked(clp); |
345c2842 | 4070 | out: |
6b10ad19 | 4071 | spin_unlock(&nn->client_lock); |
6b10ad19 TM |
4072 | if (clp) |
4073 | expire_client(clp); | |
345c2842 MJ |
4074 | return status; |
4075 | } | |
4076 | ||
4dc6ec00 | 4077 | __be32 |
eb69853d CH |
4078 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, |
4079 | struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) | |
4dc6ec00 | 4080 | { |
eb69853d | 4081 | struct nfsd4_reclaim_complete *rc = &u->reclaim_complete; |
ec59659b | 4082 | struct nfs4_client *clp = cstate->clp; |
57b7b43b | 4083 | __be32 status = 0; |
bcecf1cc | 4084 | |
4dc6ec00 BF |
4085 | if (rc->rca_one_fs) { |
4086 | if (!cstate->current_fh.fh_dentry) | |
4087 | return nfserr_nofilehandle; | |
4088 | /* | |
4089 | * We don't take advantage of the rca_one_fs case. | |
4090 | * That's OK, it's optional, we can safely ignore it. | |
4091 | */ | |
d28c442f | 4092 | return nfs_ok; |
4dc6ec00 | 4093 | } |
bcecf1cc | 4094 | |
bcecf1cc | 4095 | status = nfserr_complete_already; |
ec59659b | 4096 | if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, &clp->cl_flags)) |
bcecf1cc MJ |
4097 | goto out; |
4098 | ||
4099 | status = nfserr_stale_clientid; | |
ec59659b | 4100 | if (is_client_expired(clp)) |
4dc6ec00 BF |
4101 | /* |
4102 | * The following error isn't really legal. | |
4103 | * But we only get here if the client just explicitly | |
4104 | * destroyed the client. Surely it no longer cares what | |
4105 | * error it gets back on an operation for the dead | |
4106 | * client. | |
4107 | */ | |
bcecf1cc MJ |
4108 | goto out; |
4109 | ||
4110 | status = nfs_ok; | |
cee8aa07 | 4111 | trace_nfsd_clid_reclaim_complete(&clp->cl_clientid); |
ec59659b BF |
4112 | nfsd4_client_record_create(clp); |
4113 | inc_reclaim_complete(clp); | |
bcecf1cc | 4114 | out: |
bcecf1cc | 4115 | return status; |
4dc6ec00 BF |
4116 | } |
4117 | ||
b37ad28b | 4118 | __be32 |
b591480b | 4119 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 4120 | union nfsd4_op_u *u) |
1da177e4 | 4121 | { |
eb69853d | 4122 | struct nfsd4_setclientid *setclid = &u->setclientid; |
a084daf5 | 4123 | struct xdr_netobj clname = setclid->se_name; |
1da177e4 | 4124 | nfs4_verifier clverifier = setclid->se_verf; |
3dbacee6 TM |
4125 | struct nfs4_client *conf, *new; |
4126 | struct nfs4_client *unconf = NULL; | |
b37ad28b | 4127 | __be32 status; |
c212cecf SK |
4128 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
4129 | ||
5cc40fd7 TM |
4130 | new = create_client(clname, rqstp, &clverifier); |
4131 | if (new == NULL) | |
4132 | return nfserr_jukebox; | |
3dbacee6 | 4133 | spin_lock(&nn->client_lock); |
382a62e7 | 4134 | conf = find_confirmed_client_by_name(&clname, nn); |
2b634821 | 4135 | if (conf && client_has_state(conf)) { |
1da177e4 | 4136 | status = nfserr_clid_inuse; |
e203d506 BF |
4137 | if (clp_used_exchangeid(conf)) |
4138 | goto out; | |
026722c2 | 4139 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
27787733 | 4140 | trace_nfsd_clid_cred_mismatch(conf, rqstp); |
1da177e4 LT |
4141 | goto out; |
4142 | } | |
1da177e4 | 4143 | } |
a99454aa | 4144 | unconf = find_unconfirmed_client_by_name(&clname, nn); |
8f930711 | 4145 | if (unconf) |
3dbacee6 | 4146 | unhash_client_locked(unconf); |
744ea54c CL |
4147 | if (conf) { |
4148 | if (same_verf(&conf->cl_verifier, &clverifier)) { | |
4149 | copy_clid(new, conf); | |
4150 | gen_confirm(new, nn); | |
4151 | } else | |
4152 | trace_nfsd_clid_verf_mismatch(conf, rqstp, | |
4153 | &clverifier); | |
237f91c8 CL |
4154 | } else |
4155 | trace_nfsd_clid_fresh(new); | |
8323c3b2 | 4156 | new->cl_minorversion = 0; |
6f3d772f | 4157 | gen_callback(new, setclid, rqstp); |
ac55fdc4 | 4158 | add_to_unconfirmed(new); |
1da177e4 LT |
4159 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
4160 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
4161 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
5cc40fd7 | 4162 | new = NULL; |
1da177e4 LT |
4163 | status = nfs_ok; |
4164 | out: | |
3dbacee6 | 4165 | spin_unlock(&nn->client_lock); |
5cc40fd7 TM |
4166 | if (new) |
4167 | free_client(new); | |
237f91c8 CL |
4168 | if (unconf) { |
4169 | trace_nfsd_clid_expire_unconf(&unconf->cl_clientid); | |
3dbacee6 | 4170 | expire_client(unconf); |
237f91c8 | 4171 | } |
1da177e4 LT |
4172 | return status; |
4173 | } | |
4174 | ||
b37ad28b | 4175 | __be32 |
b591480b | 4176 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
eb69853d CH |
4177 | struct nfsd4_compound_state *cstate, |
4178 | union nfsd4_op_u *u) | |
1da177e4 | 4179 | { |
eb69853d CH |
4180 | struct nfsd4_setclientid_confirm *setclientid_confirm = |
4181 | &u->setclientid_confirm; | |
21ab45a4 | 4182 | struct nfs4_client *conf, *unconf; |
d20c11d8 | 4183 | struct nfs4_client *old = NULL; |
1da177e4 LT |
4184 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
4185 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 4186 | __be32 status; |
7f2210fa | 4187 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4188 | |
2c142baa | 4189 | if (STALE_CLIENTID(clid, nn)) |
1da177e4 | 4190 | return nfserr_stale_clientid; |
21ab45a4 | 4191 | |
d20c11d8 | 4192 | spin_lock(&nn->client_lock); |
8daae4dc | 4193 | conf = find_confirmed_client(clid, false, nn); |
0a7ec377 | 4194 | unconf = find_unconfirmed_client(clid, false, nn); |
a186e767 | 4195 | /* |
8695b90a BF |
4196 | * We try hard to give out unique clientid's, so if we get an |
4197 | * attempt to confirm the same clientid with a different cred, | |
f984a7ce BF |
4198 | * the client may be buggy; this should never happen. |
4199 | * | |
4200 | * Nevertheless, RFC 7530 recommends INUSE for this case: | |
a186e767 | 4201 | */ |
f984a7ce | 4202 | status = nfserr_clid_inuse; |
27787733 CL |
4203 | if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { |
4204 | trace_nfsd_clid_cred_mismatch(unconf, rqstp); | |
8695b90a | 4205 | goto out; |
27787733 CL |
4206 | } |
4207 | if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) { | |
4208 | trace_nfsd_clid_cred_mismatch(conf, rqstp); | |
8695b90a | 4209 | goto out; |
27787733 | 4210 | } |
90d700b7 | 4211 | if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) { |
7d22fc11 | 4212 | if (conf && same_verf(&confirm, &conf->cl_confirm)) { |
1da177e4 | 4213 | status = nfs_ok; |
237f91c8 | 4214 | } else |
90d700b7 BF |
4215 | status = nfserr_stale_clientid; |
4216 | goto out; | |
4217 | } | |
4218 | status = nfs_ok; | |
237f91c8 | 4219 | if (conf) { |
d20c11d8 JL |
4220 | old = unconf; |
4221 | unhash_client_locked(old); | |
8695b90a | 4222 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
237f91c8 | 4223 | } else { |
d20c11d8 JL |
4224 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
4225 | if (old) { | |
2b634821 BF |
4226 | status = nfserr_clid_inuse; |
4227 | if (client_has_state(old) | |
4228 | && !same_creds(&unconf->cl_cred, | |
ab451ea9 DN |
4229 | &old->cl_cred)) { |
4230 | old = NULL; | |
2b634821 | 4231 | goto out; |
ab451ea9 | 4232 | } |
d20c11d8 | 4233 | status = mark_client_expired_locked(old); |
7abea1e8 JL |
4234 | if (status) { |
4235 | old = NULL; | |
221a6876 | 4236 | goto out; |
7abea1e8 | 4237 | } |
2958d2ee | 4238 | trace_nfsd_clid_replaced(&old->cl_clientid); |
221a6876 | 4239 | } |
8695b90a | 4240 | move_to_confirmed(unconf); |
d20c11d8 | 4241 | conf = unconf; |
08e8987c | 4242 | } |
d20c11d8 JL |
4243 | get_client_locked(conf); |
4244 | spin_unlock(&nn->client_lock); | |
934bd07f BF |
4245 | if (conf == unconf) |
4246 | fsnotify_dentry(conf->cl_nfsd_info_dentry, FS_MODIFY); | |
d20c11d8 JL |
4247 | nfsd4_probe_callback(conf); |
4248 | spin_lock(&nn->client_lock); | |
4249 | put_client_renew_locked(conf); | |
1da177e4 | 4250 | out: |
d20c11d8 JL |
4251 | spin_unlock(&nn->client_lock); |
4252 | if (old) | |
4253 | expire_client(old); | |
1da177e4 LT |
4254 | return status; |
4255 | } | |
4256 | ||
32513b40 BF |
4257 | static struct nfs4_file *nfsd4_alloc_file(void) |
4258 | { | |
4259 | return kmem_cache_alloc(file_slab, GFP_KERNEL); | |
4260 | } | |
4261 | ||
1da177e4 | 4262 | /* OPEN Share state helper functions */ |
f9b60e22 | 4263 | static void nfsd4_init_file(struct svc_fh *fh, unsigned int hashval, |
5b095e99 | 4264 | struct nfs4_file *fp) |
1da177e4 | 4265 | { |
950e0118 TM |
4266 | lockdep_assert_held(&state_lock); |
4267 | ||
818a34eb | 4268 | refcount_set(&fp->fi_ref, 1); |
1d31a253 | 4269 | spin_lock_init(&fp->fi_lock); |
32513b40 BF |
4270 | INIT_LIST_HEAD(&fp->fi_stateids); |
4271 | INIT_LIST_HEAD(&fp->fi_delegations); | |
8287f009 | 4272 | INIT_LIST_HEAD(&fp->fi_clnt_odstate); |
f9b60e22 | 4273 | fh_copy_shallow(&fp->fi_fhandle, &fh->fh_handle); |
0c637be8 | 4274 | fp->fi_deleg_file = NULL; |
32513b40 | 4275 | fp->fi_had_conflict = false; |
baeb4ff0 | 4276 | fp->fi_share_deny = 0; |
32513b40 BF |
4277 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); |
4278 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
a0ce4837 BF |
4279 | fp->fi_aliased = false; |
4280 | fp->fi_inode = d_inode(fh->fh_dentry); | |
9cf514cc CH |
4281 | #ifdef CONFIG_NFSD_PNFS |
4282 | INIT_LIST_HEAD(&fp->fi_lo_states); | |
c5c707f9 | 4283 | atomic_set(&fp->fi_lo_recalls, 0); |
9cf514cc | 4284 | #endif |
5b095e99 | 4285 | hlist_add_head_rcu(&fp->fi_hash, &file_hashtbl[hashval]); |
1da177e4 LT |
4286 | } |
4287 | ||
e8ff2a84 | 4288 | void |
1da177e4 LT |
4289 | nfsd4_free_slabs(void) |
4290 | { | |
9258a2d5 | 4291 | kmem_cache_destroy(client_slab); |
abf1135b CH |
4292 | kmem_cache_destroy(openowner_slab); |
4293 | kmem_cache_destroy(lockowner_slab); | |
4294 | kmem_cache_destroy(file_slab); | |
4295 | kmem_cache_destroy(stateid_slab); | |
4296 | kmem_cache_destroy(deleg_slab); | |
9258a2d5 | 4297 | kmem_cache_destroy(odstate_slab); |
e60d4398 | 4298 | } |
1da177e4 | 4299 | |
72083396 | 4300 | int |
e60d4398 N |
4301 | nfsd4_init_slabs(void) |
4302 | { | |
9258a2d5 JL |
4303 | client_slab = kmem_cache_create("nfsd4_clients", |
4304 | sizeof(struct nfs4_client), 0, 0, NULL); | |
4305 | if (client_slab == NULL) | |
4306 | goto out; | |
fe0750e5 BF |
4307 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
4308 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
4309 | if (openowner_slab == NULL) | |
9258a2d5 | 4310 | goto out_free_client_slab; |
fe0750e5 | 4311 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", |
3c40794b | 4312 | sizeof(struct nfs4_lockowner), 0, 0, NULL); |
fe0750e5 | 4313 | if (lockowner_slab == NULL) |
abf1135b | 4314 | goto out_free_openowner_slab; |
e60d4398 | 4315 | file_slab = kmem_cache_create("nfsd4_files", |
20c2df83 | 4316 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 | 4317 | if (file_slab == NULL) |
abf1135b | 4318 | goto out_free_lockowner_slab; |
5ac049ac | 4319 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
dcef0413 | 4320 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
5ac049ac | 4321 | if (stateid_slab == NULL) |
abf1135b | 4322 | goto out_free_file_slab; |
5b2d21c1 | 4323 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 4324 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 | 4325 | if (deleg_slab == NULL) |
abf1135b | 4326 | goto out_free_stateid_slab; |
8287f009 SB |
4327 | odstate_slab = kmem_cache_create("nfsd4_odstate", |
4328 | sizeof(struct nfs4_clnt_odstate), 0, 0, NULL); | |
4329 | if (odstate_slab == NULL) | |
4330 | goto out_free_deleg_slab; | |
e60d4398 | 4331 | return 0; |
abf1135b | 4332 | |
8287f009 SB |
4333 | out_free_deleg_slab: |
4334 | kmem_cache_destroy(deleg_slab); | |
abf1135b CH |
4335 | out_free_stateid_slab: |
4336 | kmem_cache_destroy(stateid_slab); | |
4337 | out_free_file_slab: | |
4338 | kmem_cache_destroy(file_slab); | |
4339 | out_free_lockowner_slab: | |
4340 | kmem_cache_destroy(lockowner_slab); | |
4341 | out_free_openowner_slab: | |
4342 | kmem_cache_destroy(openowner_slab); | |
9258a2d5 JL |
4343 | out_free_client_slab: |
4344 | kmem_cache_destroy(client_slab); | |
abf1135b | 4345 | out: |
e60d4398 | 4346 | return -ENOMEM; |
1da177e4 LT |
4347 | } |
4348 | ||
7746b32f DN |
4349 | static unsigned long |
4350 | nfsd_courtesy_client_count(struct shrinker *shrink, struct shrink_control *sc) | |
4351 | { | |
4352 | int cnt; | |
4353 | struct nfsd_net *nn = container_of(shrink, | |
4354 | struct nfsd_net, nfsd_client_shrinker); | |
4355 | ||
4356 | cnt = atomic_read(&nn->nfsd_courtesy_clients); | |
4357 | if (cnt > 0) | |
4358 | mod_delayed_work(laundry_wq, &nn->nfsd_shrinker_work, 0); | |
4359 | return (unsigned long)cnt; | |
4360 | } | |
4361 | ||
4362 | static unsigned long | |
4363 | nfsd_courtesy_client_scan(struct shrinker *shrink, struct shrink_control *sc) | |
4364 | { | |
4365 | return SHRINK_STOP; | |
4366 | } | |
4367 | ||
4368 | int | |
4369 | nfsd4_init_leases_net(struct nfsd_net *nn) | |
6867137e | 4370 | { |
4271c2c0 DN |
4371 | struct sysinfo si; |
4372 | u64 max_clients; | |
4373 | ||
6867137e DN |
4374 | nn->nfsd4_lease = 90; /* default lease time */ |
4375 | nn->nfsd4_grace = 90; | |
4376 | nn->somebody_reclaimed = false; | |
4377 | nn->track_reclaim_completes = false; | |
a251c17a JD |
4378 | nn->clverifier_counter = get_random_u32(); |
4379 | nn->clientid_base = get_random_u32(); | |
6867137e DN |
4380 | nn->clientid_counter = nn->clientid_base + 1; |
4381 | nn->s2s_cp_cl_id = nn->clientid_counter++; | |
0926c395 DN |
4382 | |
4383 | atomic_set(&nn->nfs4_client_count, 0); | |
4271c2c0 DN |
4384 | si_meminfo(&si); |
4385 | max_clients = (u64)si.totalram * si.mem_unit / (1024 * 1024 * 1024); | |
4386 | max_clients *= NFS4_CLIENTS_PER_GB; | |
4387 | nn->nfs4_max_clients = max_t(int, max_clients, NFS4_CLIENTS_PER_GB); | |
3a4ea23d DN |
4388 | |
4389 | atomic_set(&nn->nfsd_courtesy_clients, 0); | |
7746b32f DN |
4390 | nn->nfsd_client_shrinker.scan_objects = nfsd_courtesy_client_scan; |
4391 | nn->nfsd_client_shrinker.count_objects = nfsd_courtesy_client_count; | |
4392 | nn->nfsd_client_shrinker.seeks = DEFAULT_SEEKS; | |
4393 | return register_shrinker(&nn->nfsd_client_shrinker, "nfsd-client"); | |
4394 | } | |
4395 | ||
4396 | void | |
4397 | nfsd4_leases_net_shutdown(struct nfsd_net *nn) | |
4398 | { | |
4399 | unregister_shrinker(&nn->nfsd_client_shrinker); | |
6867137e DN |
4400 | } |
4401 | ||
ff194bd9 | 4402 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 4403 | { |
ff194bd9 BF |
4404 | rp->rp_status = nfserr_serverfault; |
4405 | rp->rp_buflen = 0; | |
4406 | rp->rp_buf = rp->rp_ibuf; | |
58fb12e6 JL |
4407 | mutex_init(&rp->rp_mutex); |
4408 | } | |
4409 | ||
4410 | static void nfsd4_cstate_assign_replay(struct nfsd4_compound_state *cstate, | |
4411 | struct nfs4_stateowner *so) | |
4412 | { | |
4413 | if (!nfsd4_has_session(cstate)) { | |
4414 | mutex_lock(&so->so_replay.rp_mutex); | |
b5971afa | 4415 | cstate->replay_owner = nfs4_get_stateowner(so); |
58fb12e6 JL |
4416 | } |
4417 | } | |
4418 | ||
4419 | void nfsd4_cstate_clear_replay(struct nfsd4_compound_state *cstate) | |
4420 | { | |
4421 | struct nfs4_stateowner *so = cstate->replay_owner; | |
4422 | ||
4423 | if (so != NULL) { | |
4424 | cstate->replay_owner = NULL; | |
4425 | mutex_unlock(&so->so_replay.rp_mutex); | |
4426 | nfs4_put_stateowner(so); | |
4427 | } | |
1da177e4 LT |
4428 | } |
4429 | ||
fe0750e5 | 4430 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 4431 | { |
1da177e4 | 4432 | struct nfs4_stateowner *sop; |
1da177e4 | 4433 | |
fe0750e5 | 4434 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
4435 | if (!sop) |
4436 | return NULL; | |
4437 | ||
6f4859b8 | 4438 | xdr_netobj_dup(&sop->so_owner, owner, GFP_KERNEL); |
ff194bd9 | 4439 | if (!sop->so_owner.data) { |
fe0750e5 | 4440 | kmem_cache_free(slab, sop); |
1da177e4 | 4441 | return NULL; |
ff194bd9 | 4442 | } |
ff194bd9 | 4443 | |
ea1da636 | 4444 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 BF |
4445 | sop->so_client = clp; |
4446 | init_nfs4_replay(&sop->so_replay); | |
6b180f0b | 4447 | atomic_set(&sop->so_count, 1); |
ff194bd9 BF |
4448 | return sop; |
4449 | } | |
4450 | ||
fe0750e5 | 4451 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 | 4452 | { |
d4f0489f | 4453 | lockdep_assert_held(&clp->cl_lock); |
9b531137 | 4454 | |
d4f0489f TM |
4455 | list_add(&oo->oo_owner.so_strhash, |
4456 | &clp->cl_ownerstr_hashtbl[strhashval]); | |
fe0750e5 | 4457 | list_add(&oo->oo_perclient, &clp->cl_openowners); |
ff194bd9 BF |
4458 | } |
4459 | ||
8f4b54c5 JL |
4460 | static void nfs4_unhash_openowner(struct nfs4_stateowner *so) |
4461 | { | |
d4f0489f | 4462 | unhash_openowner_locked(openowner(so)); |
8f4b54c5 JL |
4463 | } |
4464 | ||
6b180f0b JL |
4465 | static void nfs4_free_openowner(struct nfs4_stateowner *so) |
4466 | { | |
4467 | struct nfs4_openowner *oo = openowner(so); | |
4468 | ||
4469 | kmem_cache_free(openowner_slab, oo); | |
4470 | } | |
4471 | ||
4472 | static const struct nfs4_stateowner_operations openowner_ops = { | |
8f4b54c5 JL |
4473 | .so_unhash = nfs4_unhash_openowner, |
4474 | .so_free = nfs4_free_openowner, | |
6b180f0b JL |
4475 | }; |
4476 | ||
7fc0564e AE |
4477 | static struct nfs4_ol_stateid * |
4478 | nfsd4_find_existing_open(struct nfs4_file *fp, struct nfsd4_open *open) | |
4479 | { | |
4480 | struct nfs4_ol_stateid *local, *ret = NULL; | |
4481 | struct nfs4_openowner *oo = open->op_openowner; | |
4482 | ||
4483 | lockdep_assert_held(&fp->fi_lock); | |
4484 | ||
4485 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { | |
4486 | /* ignore lock owners */ | |
4487 | if (local->st_stateowner->so_is_open_owner == 0) | |
4488 | continue; | |
15ca08d3 TM |
4489 | if (local->st_stateowner != &oo->oo_owner) |
4490 | continue; | |
4491 | if (local->st_stid.sc_type == NFS4_OPEN_STID) { | |
7fc0564e | 4492 | ret = local; |
a15dfcd5 | 4493 | refcount_inc(&ret->st_stid.sc_count); |
7fc0564e AE |
4494 | break; |
4495 | } | |
4496 | } | |
4497 | return ret; | |
4498 | } | |
4499 | ||
15ca08d3 TM |
4500 | static __be32 |
4501 | nfsd4_verify_open_stid(struct nfs4_stid *s) | |
4502 | { | |
4503 | __be32 ret = nfs_ok; | |
4504 | ||
4505 | switch (s->sc_type) { | |
4506 | default: | |
4507 | break; | |
4f176417 | 4508 | case 0: |
15ca08d3 TM |
4509 | case NFS4_CLOSED_STID: |
4510 | case NFS4_CLOSED_DELEG_STID: | |
4511 | ret = nfserr_bad_stateid; | |
4512 | break; | |
4513 | case NFS4_REVOKED_DELEG_STID: | |
4514 | ret = nfserr_deleg_revoked; | |
4515 | } | |
4516 | return ret; | |
4517 | } | |
4518 | ||
4519 | /* Lock the stateid st_mutex, and deal with races with CLOSE */ | |
4520 | static __be32 | |
4521 | nfsd4_lock_ol_stateid(struct nfs4_ol_stateid *stp) | |
4522 | { | |
4523 | __be32 ret; | |
4524 | ||
4f34bd05 | 4525 | mutex_lock_nested(&stp->st_mutex, LOCK_STATEID_MUTEX); |
15ca08d3 TM |
4526 | ret = nfsd4_verify_open_stid(&stp->st_stid); |
4527 | if (ret != nfs_ok) | |
4528 | mutex_unlock(&stp->st_mutex); | |
4529 | return ret; | |
4530 | } | |
4531 | ||
4532 | static struct nfs4_ol_stateid * | |
4533 | nfsd4_find_and_lock_existing_open(struct nfs4_file *fp, struct nfsd4_open *open) | |
4534 | { | |
4535 | struct nfs4_ol_stateid *stp; | |
4536 | for (;;) { | |
4537 | spin_lock(&fp->fi_lock); | |
4538 | stp = nfsd4_find_existing_open(fp, open); | |
4539 | spin_unlock(&fp->fi_lock); | |
4540 | if (!stp || nfsd4_lock_ol_stateid(stp) == nfs_ok) | |
4541 | break; | |
4542 | nfs4_put_stid(&stp->st_stid); | |
4543 | } | |
4544 | return stp; | |
4545 | } | |
4546 | ||
fe0750e5 | 4547 | static struct nfs4_openowner * |
13d6f66b | 4548 | alloc_init_open_stateowner(unsigned int strhashval, struct nfsd4_open *open, |
db24b3b4 JL |
4549 | struct nfsd4_compound_state *cstate) |
4550 | { | |
13d6f66b | 4551 | struct nfs4_client *clp = cstate->clp; |
7ffb5880 | 4552 | struct nfs4_openowner *oo, *ret; |
ff194bd9 | 4553 | |
fe0750e5 BF |
4554 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
4555 | if (!oo) | |
ff194bd9 | 4556 | return NULL; |
6b180f0b | 4557 | oo->oo_owner.so_ops = &openowner_ops; |
fe0750e5 BF |
4558 | oo->oo_owner.so_is_open_owner = 1; |
4559 | oo->oo_owner.so_seqid = open->op_seqid; | |
d3134b10 | 4560 | oo->oo_flags = 0; |
db24b3b4 JL |
4561 | if (nfsd4_has_session(cstate)) |
4562 | oo->oo_flags |= NFS4_OO_CONFIRMED; | |
fe0750e5 | 4563 | oo->oo_time = 0; |
38c387b5 | 4564 | oo->oo_last_closed_stid = NULL; |
fe0750e5 | 4565 | INIT_LIST_HEAD(&oo->oo_close_lru); |
d4f0489f TM |
4566 | spin_lock(&clp->cl_lock); |
4567 | ret = find_openstateowner_str_locked(strhashval, open, clp); | |
7ffb5880 TM |
4568 | if (ret == NULL) { |
4569 | hash_openowner(oo, clp, strhashval); | |
4570 | ret = oo; | |
4571 | } else | |
d50ffded KM |
4572 | nfs4_free_stateowner(&oo->oo_owner); |
4573 | ||
d4f0489f | 4574 | spin_unlock(&clp->cl_lock); |
c5952338 | 4575 | return ret; |
1da177e4 LT |
4576 | } |
4577 | ||
7fc0564e | 4578 | static struct nfs4_ol_stateid * |
8c7245ab | 4579 | init_open_stateid(struct nfs4_file *fp, struct nfsd4_open *open) |
7fc0564e AE |
4580 | { |
4581 | ||
fe0750e5 | 4582 | struct nfs4_openowner *oo = open->op_openowner; |
7fc0564e | 4583 | struct nfs4_ol_stateid *retstp = NULL; |
8c7245ab | 4584 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4585 | |
8c7245ab | 4586 | stp = open->op_stp; |
5cc1fb2a OD |
4587 | /* We are moving these outside of the spinlocks to avoid the warnings */ |
4588 | mutex_init(&stp->st_mutex); | |
4f34bd05 | 4589 | mutex_lock_nested(&stp->st_mutex, OPEN_STATEID_MUTEX); |
5cc1fb2a | 4590 | |
15ca08d3 | 4591 | retry: |
7fc0564e AE |
4592 | spin_lock(&oo->oo_owner.so_client->cl_lock); |
4593 | spin_lock(&fp->fi_lock); | |
4594 | ||
4595 | retstp = nfsd4_find_existing_open(fp, open); | |
4596 | if (retstp) | |
4597 | goto out_unlock; | |
8c7245ab OD |
4598 | |
4599 | open->op_stp = NULL; | |
a15dfcd5 | 4600 | refcount_inc(&stp->st_stid.sc_count); |
3abdb607 | 4601 | stp->st_stid.sc_type = NFS4_OPEN_STID; |
3c87b9b7 | 4602 | INIT_LIST_HEAD(&stp->st_locks); |
b5971afa | 4603 | stp->st_stateowner = nfs4_get_stateowner(&oo->oo_owner); |
13cd2184 | 4604 | get_nfs4_file(fp); |
11b9164a | 4605 | stp->st_stid.sc_file = fp; |
1da177e4 LT |
4606 | stp->st_access_bmap = 0; |
4607 | stp->st_deny_bmap = 0; | |
4c4cd222 | 4608 | stp->st_openstp = NULL; |
1c755dc1 | 4609 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); |
1d31a253 | 4610 | list_add(&stp->st_perfile, &fp->fi_stateids); |
7fc0564e AE |
4611 | |
4612 | out_unlock: | |
1d31a253 | 4613 | spin_unlock(&fp->fi_lock); |
1c755dc1 | 4614 | spin_unlock(&oo->oo_owner.so_client->cl_lock); |
5cc1fb2a | 4615 | if (retstp) { |
15ca08d3 TM |
4616 | /* Handle races with CLOSE */ |
4617 | if (nfsd4_lock_ol_stateid(retstp) != nfs_ok) { | |
4618 | nfs4_put_stid(&retstp->st_stid); | |
4619 | goto retry; | |
4620 | } | |
8c7245ab | 4621 | /* To keep mutex tracking happy */ |
5cc1fb2a | 4622 | mutex_unlock(&stp->st_mutex); |
8c7245ab | 4623 | stp = retstp; |
5cc1fb2a | 4624 | } |
8c7245ab | 4625 | return stp; |
1da177e4 LT |
4626 | } |
4627 | ||
d3134b10 JL |
4628 | /* |
4629 | * In the 4.0 case we need to keep the owners around a little while to handle | |
4630 | * CLOSE replay. We still do need to release any file access that is held by | |
4631 | * them before returning however. | |
4632 | */ | |
fd39ca9a | 4633 | static void |
d3134b10 | 4634 | move_to_close_lru(struct nfs4_ol_stateid *s, struct net *net) |
1da177e4 | 4635 | { |
217526e7 | 4636 | struct nfs4_ol_stateid *last; |
d3134b10 JL |
4637 | struct nfs4_openowner *oo = openowner(s->st_stateowner); |
4638 | struct nfsd_net *nn = net_generic(s->st_stid.sc_client->net, | |
4639 | nfsd_net_id); | |
73758fed | 4640 | |
fe0750e5 | 4641 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 4642 | |
b401be22 JL |
4643 | /* |
4644 | * We know that we hold one reference via nfsd4_close, and another | |
4645 | * "persistent" reference for the client. If the refcount is higher | |
4646 | * than 2, then there are still calls in progress that are using this | |
4647 | * stateid. We can't put the sc_file reference until they are finished. | |
4648 | * Wait for the refcount to drop to 2. Since it has been unhashed, | |
4649 | * there should be no danger of the refcount going back up again at | |
4650 | * this point. | |
4651 | */ | |
a15dfcd5 | 4652 | wait_event(close_wq, refcount_read(&s->st_stid.sc_count) == 2); |
b401be22 | 4653 | |
d3134b10 JL |
4654 | release_all_access(s); |
4655 | if (s->st_stid.sc_file) { | |
4656 | put_nfs4_file(s->st_stid.sc_file); | |
4657 | s->st_stid.sc_file = NULL; | |
4658 | } | |
217526e7 JL |
4659 | |
4660 | spin_lock(&nn->client_lock); | |
4661 | last = oo->oo_last_closed_stid; | |
d3134b10 | 4662 | oo->oo_last_closed_stid = s; |
73758fed | 4663 | list_move_tail(&oo->oo_close_lru, &nn->close_lru); |
20b7d86f | 4664 | oo->oo_time = ktime_get_boottime_seconds(); |
217526e7 JL |
4665 | spin_unlock(&nn->client_lock); |
4666 | if (last) | |
4667 | nfs4_put_stid(&last->st_stid); | |
1da177e4 LT |
4668 | } |
4669 | ||
1da177e4 LT |
4670 | /* search file_hashtbl[] for file */ |
4671 | static struct nfs4_file * | |
f9b60e22 | 4672 | find_file_locked(struct svc_fh *fh, unsigned int hashval) |
1da177e4 | 4673 | { |
1da177e4 LT |
4674 | struct nfs4_file *fp; |
4675 | ||
36a80491 MB |
4676 | hlist_for_each_entry_rcu(fp, &file_hashtbl[hashval], fi_hash, |
4677 | lockdep_is_held(&state_lock)) { | |
f9b60e22 | 4678 | if (fh_match(&fp->fi_fhandle, &fh->fh_handle)) { |
818a34eb | 4679 | if (refcount_inc_not_zero(&fp->fi_ref)) |
5b095e99 | 4680 | return fp; |
13cd2184 | 4681 | } |
1da177e4 LT |
4682 | } |
4683 | return NULL; | |
4684 | } | |
4685 | ||
a0ce4837 BF |
4686 | static struct nfs4_file *insert_file(struct nfs4_file *new, struct svc_fh *fh, |
4687 | unsigned int hashval) | |
4688 | { | |
4689 | struct nfs4_file *fp; | |
4690 | struct nfs4_file *ret = NULL; | |
4691 | bool alias_found = false; | |
4692 | ||
4693 | spin_lock(&state_lock); | |
4694 | hlist_for_each_entry_rcu(fp, &file_hashtbl[hashval], fi_hash, | |
4695 | lockdep_is_held(&state_lock)) { | |
4696 | if (fh_match(&fp->fi_fhandle, &fh->fh_handle)) { | |
4697 | if (refcount_inc_not_zero(&fp->fi_ref)) | |
4698 | ret = fp; | |
4699 | } else if (d_inode(fh->fh_dentry) == fp->fi_inode) | |
4700 | fp->fi_aliased = alias_found = true; | |
4701 | } | |
4702 | if (likely(ret == NULL)) { | |
4703 | nfsd4_init_file(fh, hashval, new); | |
4704 | new->fi_aliased = alias_found; | |
4705 | ret = new; | |
4706 | } | |
4707 | spin_unlock(&state_lock); | |
4708 | return ret; | |
4709 | } | |
4710 | ||
f9b60e22 | 4711 | static struct nfs4_file * find_file(struct svc_fh *fh) |
950e0118 TM |
4712 | { |
4713 | struct nfs4_file *fp; | |
5b095e99 | 4714 | unsigned int hashval = file_hashval(fh); |
950e0118 | 4715 | |
5b095e99 JL |
4716 | rcu_read_lock(); |
4717 | fp = find_file_locked(fh, hashval); | |
4718 | rcu_read_unlock(); | |
950e0118 TM |
4719 | return fp; |
4720 | } | |
4721 | ||
4722 | static struct nfs4_file * | |
f9b60e22 | 4723 | find_or_add_file(struct nfs4_file *new, struct svc_fh *fh) |
950e0118 TM |
4724 | { |
4725 | struct nfs4_file *fp; | |
5b095e99 JL |
4726 | unsigned int hashval = file_hashval(fh); |
4727 | ||
4728 | rcu_read_lock(); | |
4729 | fp = find_file_locked(fh, hashval); | |
4730 | rcu_read_unlock(); | |
4731 | if (fp) | |
4732 | return fp; | |
950e0118 | 4733 | |
a0ce4837 | 4734 | return insert_file(new, fh, hashval); |
950e0118 TM |
4735 | } |
4736 | ||
1da177e4 LT |
4737 | /* |
4738 | * Called to check deny when READ with all zero stateid or | |
4739 | * WRITE with all zero or all one stateid | |
4740 | */ | |
b37ad28b | 4741 | static __be32 |
1da177e4 LT |
4742 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
4743 | { | |
1da177e4 | 4744 | struct nfs4_file *fp; |
baeb4ff0 | 4745 | __be32 ret = nfs_ok; |
1da177e4 | 4746 | |
f9b60e22 | 4747 | fp = find_file(current_fh); |
13cd2184 | 4748 | if (!fp) |
baeb4ff0 JL |
4749 | return ret; |
4750 | /* Check for conflicting share reservations */ | |
1d31a253 | 4751 | spin_lock(&fp->fi_lock); |
baeb4ff0 JL |
4752 | if (fp->fi_share_deny & deny_type) |
4753 | ret = nfserr_locked; | |
1d31a253 | 4754 | spin_unlock(&fp->fi_lock); |
13cd2184 N |
4755 | put_nfs4_file(fp); |
4756 | return ret; | |
1da177e4 LT |
4757 | } |
4758 | ||
c035362e CL |
4759 | static bool nfsd4_deleg_present(const struct inode *inode) |
4760 | { | |
4761 | struct file_lock_context *ctx = smp_load_acquire(&inode->i_flctx); | |
4762 | ||
4763 | return ctx && !list_empty_careful(&ctx->flc_lease); | |
4764 | } | |
4765 | ||
4766 | /** | |
4767 | * nfsd_wait_for_delegreturn - wait for delegations to be returned | |
4768 | * @rqstp: the RPC transaction being executed | |
4769 | * @inode: in-core inode of the file being waited for | |
4770 | * | |
4771 | * The timeout prevents deadlock if all nfsd threads happen to be | |
4772 | * tied up waiting for returning delegations. | |
4773 | * | |
4774 | * Return values: | |
4775 | * %true: delegation was returned | |
4776 | * %false: timed out waiting for delegreturn | |
4777 | */ | |
4778 | bool nfsd_wait_for_delegreturn(struct svc_rqst *rqstp, struct inode *inode) | |
4779 | { | |
4780 | long __maybe_unused timeo; | |
4781 | ||
4782 | timeo = wait_var_event_timeout(inode, !nfsd4_deleg_present(inode), | |
4783 | NFSD_DELEGRETURN_TIMEOUT); | |
4784 | trace_nfsd_delegret_wakeup(rqstp, inode, timeo); | |
4785 | return timeo > 0; | |
4786 | } | |
4787 | ||
0162ac2b | 4788 | static void nfsd4_cb_recall_prepare(struct nfsd4_callback *cb) |
1da177e4 | 4789 | { |
0162ac2b | 4790 | struct nfs4_delegation *dp = cb_to_delegation(cb); |
11b9164a TM |
4791 | struct nfsd_net *nn = net_generic(dp->dl_stid.sc_client->net, |
4792 | nfsd_net_id); | |
e8c69d17 | 4793 | |
11b9164a | 4794 | block_delegations(&dp->dl_stid.sc_file->fi_fhandle); |
f54fe962 | 4795 | |
dff1399f | 4796 | /* |
f54fe962 JL |
4797 | * We can't do this in nfsd_break_deleg_cb because it is |
4798 | * already holding inode->i_lock. | |
4799 | * | |
dff1399f JL |
4800 | * If the dl_time != 0, then we know that it has already been |
4801 | * queued for a lease break. Don't queue it again. | |
4802 | */ | |
f54fe962 | 4803 | spin_lock(&state_lock); |
548ec080 | 4804 | if (delegation_hashed(dp) && dp->dl_time == 0) { |
20b7d86f | 4805 | dp->dl_time = ktime_get_boottime_seconds(); |
02e1215f | 4806 | list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru); |
dff1399f | 4807 | } |
02e1215f JL |
4808 | spin_unlock(&state_lock); |
4809 | } | |
1da177e4 | 4810 | |
0162ac2b CH |
4811 | static int nfsd4_cb_recall_done(struct nfsd4_callback *cb, |
4812 | struct rpc_task *task) | |
4813 | { | |
4814 | struct nfs4_delegation *dp = cb_to_delegation(cb); | |
4815 | ||
1035d654 CL |
4816 | trace_nfsd_cb_recall_done(&dp->dl_stid.sc_stateid, task); |
4817 | ||
12ed22f3 BF |
4818 | if (dp->dl_stid.sc_type == NFS4_CLOSED_DELEG_STID || |
4819 | dp->dl_stid.sc_type == NFS4_REVOKED_DELEG_STID) | |
a457974f AE |
4820 | return 1; |
4821 | ||
0162ac2b CH |
4822 | switch (task->tk_status) { |
4823 | case 0: | |
4824 | return 1; | |
1c73b9d2 SM |
4825 | case -NFS4ERR_DELAY: |
4826 | rpc_delay(task, 2 * HZ); | |
4827 | return 0; | |
0162ac2b CH |
4828 | case -EBADHANDLE: |
4829 | case -NFS4ERR_BAD_STATEID: | |
4830 | /* | |
4831 | * Race: client probably got cb_recall before open reply | |
4832 | * granting delegation. | |
4833 | */ | |
4834 | if (dp->dl_retries--) { | |
4835 | rpc_delay(task, 2 * HZ); | |
4836 | return 0; | |
4837 | } | |
df561f66 | 4838 | fallthrough; |
0162ac2b | 4839 | default: |
1c73b9d2 | 4840 | return 1; |
0162ac2b CH |
4841 | } |
4842 | } | |
4843 | ||
4844 | static void nfsd4_cb_recall_release(struct nfsd4_callback *cb) | |
4845 | { | |
4846 | struct nfs4_delegation *dp = cb_to_delegation(cb); | |
4847 | ||
4848 | nfs4_put_stid(&dp->dl_stid); | |
4849 | } | |
4850 | ||
c4cb8974 | 4851 | static const struct nfsd4_callback_ops nfsd4_cb_recall_ops = { |
0162ac2b CH |
4852 | .prepare = nfsd4_cb_recall_prepare, |
4853 | .done = nfsd4_cb_recall_done, | |
4854 | .release = nfsd4_cb_recall_release, | |
4855 | }; | |
4856 | ||
02e1215f JL |
4857 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
4858 | { | |
4859 | /* | |
4860 | * We're assuming the state code never drops its reference | |
4861 | * without first removing the lease. Since we're in this lease | |
4a269efb | 4862 | * callback (and since the lease code is serialized by the |
25fbe1fc | 4863 | * flc_lock) we know the server hasn't removed the lease yet, and |
4a269efb | 4864 | * we know it's safe to take a reference. |
02e1215f | 4865 | */ |
a15dfcd5 | 4866 | refcount_inc(&dp->dl_stid.sc_count); |
b95239ca | 4867 | WARN_ON_ONCE(!nfsd4_run_cb(&dp->dl_recall)); |
6b57d9c8 BF |
4868 | } |
4869 | ||
25fbe1fc | 4870 | /* Called from break_lease() with flc_lock held. */ |
4d01b7f5 JL |
4871 | static bool |
4872 | nfsd_break_deleg_cb(struct file_lock *fl) | |
6b57d9c8 | 4873 | { |
653e514e BF |
4874 | struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; |
4875 | struct nfs4_file *fp = dp->dl_stid.sc_file; | |
66af2579 DN |
4876 | struct nfs4_client *clp = dp->dl_stid.sc_client; |
4877 | struct nfsd_net *nn; | |
6b57d9c8 | 4878 | |
17d76ddf | 4879 | trace_nfsd_cb_recall(&dp->dl_stid); |
dd5e3fbc | 4880 | |
66af2579 DN |
4881 | dp->dl_recalled = true; |
4882 | atomic_inc(&clp->cl_delegs_in_recall); | |
4883 | if (try_to_expire_client(clp)) { | |
4884 | nn = net_generic(clp->net, nfsd_net_id); | |
4885 | mod_delayed_work(laundry_wq, &nn->laundromat_work, 0); | |
4886 | } | |
4887 | ||
0272e1fd BF |
4888 | /* |
4889 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 4890 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 4891 | * in time: |
0272e1fd BF |
4892 | */ |
4893 | fl->fl_break_time = 0; | |
1da177e4 | 4894 | |
02e1215f | 4895 | spin_lock(&fp->fi_lock); |
417c6629 | 4896 | fp->fi_had_conflict = true; |
353601e7 | 4897 | nfsd_break_one_deleg(dp); |
02e1215f | 4898 | spin_unlock(&fp->fi_lock); |
b95239ca | 4899 | return false; |
1da177e4 LT |
4900 | } |
4901 | ||
50719bf3 CL |
4902 | /** |
4903 | * nfsd_breaker_owns_lease - Check if lease conflict was resolved | |
4904 | * @fl: Lock state to check | |
4905 | * | |
4906 | * Return values: | |
4907 | * %true: Lease conflict was resolved | |
4908 | * %false: Lease conflict was not resolved. | |
4909 | */ | |
28df3d15 BF |
4910 | static bool nfsd_breaker_owns_lease(struct file_lock *fl) |
4911 | { | |
4912 | struct nfs4_delegation *dl = fl->fl_owner; | |
4913 | struct svc_rqst *rqst; | |
4914 | struct nfs4_client *clp; | |
4915 | ||
4916 | if (!i_am_nfsd()) | |
50719bf3 | 4917 | return false; |
28df3d15 | 4918 | rqst = kthread_data(current); |
13956160 BF |
4919 | /* Note rq_prog == NFS_ACL_PROGRAM is also possible: */ |
4920 | if (rqst->rq_prog != NFS_PROGRAM || rqst->rq_vers < 4) | |
50719bf3 | 4921 | return false; |
28df3d15 BF |
4922 | clp = *(rqst->rq_lease_breaker); |
4923 | return dl->dl_stid.sc_client == clp; | |
4924 | } | |
4925 | ||
c45198ed | 4926 | static int |
7448cc37 JL |
4927 | nfsd_change_deleg_cb(struct file_lock *onlist, int arg, |
4928 | struct list_head *dispose) | |
1da177e4 | 4929 | { |
66af2579 DN |
4930 | struct nfs4_delegation *dp = (struct nfs4_delegation *)onlist->fl_owner; |
4931 | struct nfs4_client *clp = dp->dl_stid.sc_client; | |
4932 | ||
4933 | if (arg & F_UNLCK) { | |
4934 | if (dp->dl_recalled) | |
4935 | atomic_dec(&clp->cl_delegs_in_recall); | |
c45198ed | 4936 | return lease_modify(onlist, arg, dispose); |
66af2579 | 4937 | } else |
1da177e4 LT |
4938 | return -EAGAIN; |
4939 | } | |
4940 | ||
7b021967 | 4941 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
28df3d15 | 4942 | .lm_breaker_owns_lease = nfsd_breaker_owns_lease, |
8fb47a4f BF |
4943 | .lm_break = nfsd_break_deleg_cb, |
4944 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
4945 | }; |
4946 | ||
7a8711c9 BF |
4947 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
4948 | { | |
4949 | if (nfsd4_has_session(cstate)) | |
4950 | return nfs_ok; | |
4951 | if (seqid == so->so_seqid - 1) | |
4952 | return nfserr_replay_me; | |
4953 | if (seqid == so->so_seqid) | |
4954 | return nfs_ok; | |
4955 | return nfserr_bad_seqid; | |
4956 | } | |
1da177e4 | 4957 | |
7950b531 BF |
4958 | static struct nfs4_client *lookup_clientid(clientid_t *clid, bool sessions, |
4959 | struct nfsd_net *nn) | |
4960 | { | |
4961 | struct nfs4_client *found; | |
4962 | ||
4963 | spin_lock(&nn->client_lock); | |
4964 | found = find_confirmed_client(clid, sessions, nn); | |
4965 | if (found) | |
4966 | atomic_inc(&found->cl_rpc_users); | |
4967 | spin_unlock(&nn->client_lock); | |
4968 | return found; | |
4969 | } | |
4970 | ||
460d2709 | 4971 | static __be32 set_client(clientid_t *clid, |
4b24ca7d | 4972 | struct nfsd4_compound_state *cstate, |
f71475ba | 4973 | struct nfsd_net *nn) |
4b24ca7d | 4974 | { |
4b24ca7d | 4975 | if (cstate->clp) { |
7950b531 | 4976 | if (!same_clid(&cstate->clp->cl_clientid, clid)) |
4b24ca7d JL |
4977 | return nfserr_stale_clientid; |
4978 | return nfs_ok; | |
4979 | } | |
4b24ca7d JL |
4980 | if (STALE_CLIENTID(clid, nn)) |
4981 | return nfserr_stale_clientid; | |
4b24ca7d | 4982 | /* |
f71475ba BF |
4983 | * We're in the 4.0 case (otherwise the SEQUENCE op would have |
4984 | * set cstate->clp), so session = false: | |
4b24ca7d | 4985 | */ |
f71475ba | 4986 | cstate->clp = lookup_clientid(clid, false, nn); |
7950b531 | 4987 | if (!cstate->clp) |
4b24ca7d | 4988 | return nfserr_expired; |
4b24ca7d JL |
4989 | return nfs_ok; |
4990 | } | |
4991 | ||
b37ad28b | 4992 | __be32 |
6668958f | 4993 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
3320fef1 | 4994 | struct nfsd4_open *open, struct nfsd_net *nn) |
1da177e4 | 4995 | { |
1da177e4 LT |
4996 | clientid_t *clientid = &open->op_clientid; |
4997 | struct nfs4_client *clp = NULL; | |
4998 | unsigned int strhashval; | |
fe0750e5 | 4999 | struct nfs4_openowner *oo = NULL; |
4cdc951b | 5000 | __be32 status; |
1da177e4 | 5001 | |
32513b40 BF |
5002 | /* |
5003 | * In case we need it later, after we've already created the | |
5004 | * file and don't want to risk a further failure: | |
5005 | */ | |
5006 | open->op_file = nfsd4_alloc_file(); | |
5007 | if (open->op_file == NULL) | |
5008 | return nfserr_jukebox; | |
1da177e4 | 5009 | |
f71475ba | 5010 | status = set_client(clientid, cstate, nn); |
2d91e895 TM |
5011 | if (status) |
5012 | return status; | |
5013 | clp = cstate->clp; | |
5014 | ||
d4f0489f TM |
5015 | strhashval = ownerstr_hashval(&open->op_owner); |
5016 | oo = find_openstateowner_str(strhashval, open, clp); | |
fe0750e5 BF |
5017 | open->op_openowner = oo; |
5018 | if (!oo) { | |
bcf130f9 | 5019 | goto new_owner; |
1da177e4 | 5020 | } |
dad1c067 | 5021 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
0f442aa2 | 5022 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
5023 | release_openowner(oo); |
5024 | open->op_openowner = NULL; | |
bcf130f9 | 5025 | goto new_owner; |
0f442aa2 | 5026 | } |
4cdc951b BF |
5027 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
5028 | if (status) | |
5029 | return status; | |
4cdc951b | 5030 | goto alloc_stateid; |
bcf130f9 | 5031 | new_owner: |
13d6f66b | 5032 | oo = alloc_init_open_stateowner(strhashval, open, cstate); |
bcf130f9 BF |
5033 | if (oo == NULL) |
5034 | return nfserr_jukebox; | |
5035 | open->op_openowner = oo; | |
4cdc951b | 5036 | alloc_stateid: |
b49e084d | 5037 | open->op_stp = nfs4_alloc_open_stateid(clp); |
4cdc951b BF |
5038 | if (!open->op_stp) |
5039 | return nfserr_jukebox; | |
8287f009 SB |
5040 | |
5041 | if (nfsd4_has_session(cstate) && | |
5042 | (cstate->current_fh.fh_export->ex_flags & NFSEXP_PNFS)) { | |
5043 | open->op_odstate = alloc_clnt_odstate(clp); | |
5044 | if (!open->op_odstate) | |
5045 | return nfserr_jukebox; | |
5046 | } | |
5047 | ||
0f442aa2 | 5048 | return nfs_ok; |
1da177e4 LT |
5049 | } |
5050 | ||
b37ad28b | 5051 | static inline __be32 |
4a6e43e6 N |
5052 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
5053 | { | |
5054 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
5055 | return nfserr_openmode; | |
5056 | else | |
5057 | return nfs_ok; | |
5058 | } | |
5059 | ||
f459e453 | 5060 | static int share_access_to_flags(u32 share_access) |
52f4fb43 | 5061 | { |
f459e453 | 5062 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
52f4fb43 N |
5063 | } |
5064 | ||
38c2f4b1 | 5065 | static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) |
24a0111e | 5066 | { |
f459e453 | 5067 | struct nfs4_stid *ret; |
24a0111e | 5068 | |
95da1b3a AE |
5069 | ret = find_stateid_by_type(cl, s, |
5070 | NFS4_DELEG_STID|NFS4_REVOKED_DELEG_STID); | |
f459e453 BF |
5071 | if (!ret) |
5072 | return NULL; | |
5073 | return delegstateid(ret); | |
24a0111e BF |
5074 | } |
5075 | ||
8b289b2c BF |
5076 | static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) |
5077 | { | |
5078 | return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || | |
5079 | open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; | |
5080 | } | |
5081 | ||
b37ad28b | 5082 | static __be32 |
41d22663 | 5083 | nfs4_check_deleg(struct nfs4_client *cl, struct nfsd4_open *open, |
567d9829 N |
5084 | struct nfs4_delegation **dp) |
5085 | { | |
5086 | int flags; | |
b37ad28b | 5087 | __be32 status = nfserr_bad_stateid; |
dcd94cc2 | 5088 | struct nfs4_delegation *deleg; |
567d9829 | 5089 | |
dcd94cc2 TM |
5090 | deleg = find_deleg_stateid(cl, &open->op_delegate_stateid); |
5091 | if (deleg == NULL) | |
c44c5eeb | 5092 | goto out; |
95da1b3a AE |
5093 | if (deleg->dl_stid.sc_type == NFS4_REVOKED_DELEG_STID) { |
5094 | nfs4_put_stid(&deleg->dl_stid); | |
5095 | if (cl->cl_minorversion) | |
5096 | status = nfserr_deleg_revoked; | |
5097 | goto out; | |
5098 | } | |
24a0111e | 5099 | flags = share_access_to_flags(open->op_share_access); |
dcd94cc2 TM |
5100 | status = nfs4_check_delegmode(deleg, flags); |
5101 | if (status) { | |
5102 | nfs4_put_stid(&deleg->dl_stid); | |
5103 | goto out; | |
5104 | } | |
5105 | *dp = deleg; | |
c44c5eeb | 5106 | out: |
8b289b2c | 5107 | if (!nfsd4_is_deleg_cur(open)) |
c44c5eeb N |
5108 | return nfs_ok; |
5109 | if (status) | |
5110 | return status; | |
dad1c067 | 5111 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
c44c5eeb | 5112 | return nfs_ok; |
567d9829 N |
5113 | } |
5114 | ||
21fb4016 BF |
5115 | static inline int nfs4_access_to_access(u32 nfs4_access) |
5116 | { | |
5117 | int flags = 0; | |
5118 | ||
5119 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
5120 | flags |= NFSD_MAY_READ; | |
5121 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
5122 | flags |= NFSD_MAY_WRITE; | |
5123 | return flags; | |
5124 | } | |
5125 | ||
7e6a72e5 CH |
5126 | static inline __be32 |
5127 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, | |
5128 | struct nfsd4_open *open) | |
5129 | { | |
5130 | struct iattr iattr = { | |
5131 | .ia_valid = ATTR_SIZE, | |
5132 | .ia_size = 0, | |
5133 | }; | |
7fe2a71d N |
5134 | struct nfsd_attrs attrs = { |
5135 | .na_iattr = &iattr, | |
5136 | }; | |
7e6a72e5 CH |
5137 | if (!open->op_truncate) |
5138 | return 0; | |
5139 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
5140 | return nfserr_inval; | |
7fe2a71d | 5141 | return nfsd_setattr(rqstp, fh, &attrs, 0, (time64_t)0); |
7e6a72e5 CH |
5142 | } |
5143 | ||
0c12eaff | 5144 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
6eb3a1d0 | 5145 | struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp, |
3d694271 | 5146 | struct nfsd4_open *open, bool new_stp) |
f9d7562f | 5147 | { |
fd4f83fd | 5148 | struct nfsd_file *nf = NULL; |
f9d7562f | 5149 | __be32 status; |
0c12eaff CB |
5150 | int oflag = nfs4_access_to_omode(open->op_share_access); |
5151 | int access = nfs4_access_to_access(open->op_share_access); | |
baeb4ff0 | 5152 | unsigned char old_access_bmap, old_deny_bmap; |
0c12eaff | 5153 | |
de18643d | 5154 | spin_lock(&fp->fi_lock); |
baeb4ff0 JL |
5155 | |
5156 | /* | |
5157 | * Are we trying to set a deny mode that would conflict with | |
5158 | * current access? | |
5159 | */ | |
5160 | status = nfs4_file_check_deny(fp, open->op_share_deny); | |
5161 | if (status != nfs_ok) { | |
3d694271 DN |
5162 | if (status != nfserr_share_denied) { |
5163 | spin_unlock(&fp->fi_lock); | |
5164 | goto out; | |
5165 | } | |
5166 | if (nfs4_resolve_deny_conflicts_locked(fp, new_stp, | |
5167 | stp, open->op_share_deny, false)) | |
5168 | status = nfserr_jukebox; | |
baeb4ff0 JL |
5169 | spin_unlock(&fp->fi_lock); |
5170 | goto out; | |
5171 | } | |
5172 | ||
5173 | /* set access to the file */ | |
5174 | status = nfs4_file_get_access(fp, open->op_share_access); | |
5175 | if (status != nfs_ok) { | |
3d694271 DN |
5176 | if (status != nfserr_share_denied) { |
5177 | spin_unlock(&fp->fi_lock); | |
5178 | goto out; | |
5179 | } | |
5180 | if (nfs4_resolve_deny_conflicts_locked(fp, new_stp, | |
5181 | stp, open->op_share_access, true)) | |
5182 | status = nfserr_jukebox; | |
baeb4ff0 JL |
5183 | spin_unlock(&fp->fi_lock); |
5184 | goto out; | |
5185 | } | |
5186 | ||
5187 | /* Set access bits in stateid */ | |
5188 | old_access_bmap = stp->st_access_bmap; | |
5189 | set_access(open->op_share_access, stp); | |
5190 | ||
5191 | /* Set new deny mask */ | |
5192 | old_deny_bmap = stp->st_deny_bmap; | |
5193 | set_deny(open->op_share_deny, stp); | |
5194 | fp->fi_share_deny |= (open->op_share_deny & NFS4_SHARE_DENY_BOTH); | |
5195 | ||
f9d7562f | 5196 | if (!fp->fi_fds[oflag]) { |
de18643d | 5197 | spin_unlock(&fp->fi_lock); |
fb70bf12 CL |
5198 | |
5199 | if (!open->op_filp) { | |
5200 | status = nfsd_file_acquire(rqstp, cur_fh, access, &nf); | |
5201 | if (status != nfs_ok) | |
5202 | goto out_put_access; | |
5203 | } else { | |
5204 | status = nfsd_file_create(rqstp, cur_fh, access, &nf); | |
5205 | if (status != nfs_ok) | |
5206 | goto out_put_access; | |
5207 | nf->nf_file = open->op_filp; | |
5208 | open->op_filp = NULL; | |
be023006 | 5209 | trace_nfsd_file_create(rqstp, access, nf); |
fb70bf12 CL |
5210 | } |
5211 | ||
de18643d TM |
5212 | spin_lock(&fp->fi_lock); |
5213 | if (!fp->fi_fds[oflag]) { | |
fd4f83fd JL |
5214 | fp->fi_fds[oflag] = nf; |
5215 | nf = NULL; | |
de18643d | 5216 | } |
f9d7562f | 5217 | } |
de18643d | 5218 | spin_unlock(&fp->fi_lock); |
fd4f83fd JL |
5219 | if (nf) |
5220 | nfsd_file_put(nf); | |
f9d7562f | 5221 | |
217fd6f6 BF |
5222 | status = nfserrno(nfsd_open_break_lease(cur_fh->fh_dentry->d_inode, |
5223 | access)); | |
5224 | if (status) | |
5225 | goto out_put_access; | |
5226 | ||
7e6a72e5 CH |
5227 | status = nfsd4_truncate(rqstp, cur_fh, open); |
5228 | if (status) | |
5229 | goto out_put_access; | |
7e6a72e5 CH |
5230 | out: |
5231 | return status; | |
baeb4ff0 JL |
5232 | out_put_access: |
5233 | stp->st_access_bmap = old_access_bmap; | |
5234 | nfs4_file_put_access(fp, open->op_share_access); | |
5235 | reset_union_bmap_deny(bmap_to_share_mode(old_deny_bmap), stp); | |
5236 | goto out; | |
1da177e4 LT |
5237 | } |
5238 | ||
b37ad28b | 5239 | static __be32 |
3d694271 DN |
5240 | nfs4_upgrade_open(struct svc_rqst *rqstp, struct nfs4_file *fp, |
5241 | struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp, | |
5242 | struct nfsd4_open *open) | |
1da177e4 | 5243 | { |
b37ad28b | 5244 | __be32 status; |
6ac75368 | 5245 | unsigned char old_deny_bmap = stp->st_deny_bmap; |
1da177e4 | 5246 | |
6eb3a1d0 | 5247 | if (!test_access(open->op_share_access, stp)) |
3d694271 | 5248 | return nfs4_get_vfs_file(rqstp, fp, cur_fh, stp, open, false); |
7e6a72e5 | 5249 | |
baeb4ff0 JL |
5250 | /* test and set deny mode */ |
5251 | spin_lock(&fp->fi_lock); | |
5252 | status = nfs4_file_check_deny(fp, open->op_share_deny); | |
5253 | if (status == nfs_ok) { | |
3d694271 DN |
5254 | if (status != nfserr_share_denied) { |
5255 | set_deny(open->op_share_deny, stp); | |
5256 | fp->fi_share_deny |= | |
baeb4ff0 | 5257 | (open->op_share_deny & NFS4_SHARE_DENY_BOTH); |
3d694271 DN |
5258 | } else { |
5259 | if (nfs4_resolve_deny_conflicts_locked(fp, false, | |
5260 | stp, open->op_share_deny, false)) | |
5261 | status = nfserr_jukebox; | |
5262 | } | |
baeb4ff0 JL |
5263 | } |
5264 | spin_unlock(&fp->fi_lock); | |
5265 | ||
5266 | if (status != nfs_ok) | |
1da177e4 | 5267 | return status; |
1da177e4 | 5268 | |
baeb4ff0 JL |
5269 | status = nfsd4_truncate(rqstp, cur_fh, open); |
5270 | if (status != nfs_ok) | |
5271 | reset_union_bmap_deny(old_deny_bmap, stp); | |
5272 | return status; | |
5273 | } | |
1da177e4 | 5274 | |
14a24e99 BF |
5275 | /* Should we give out recallable state?: */ |
5276 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
5277 | { | |
5278 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
5279 | return true; | |
5280 | /* | |
5281 | * In the sessions case, since we don't have to establish a | |
5282 | * separate connection for callbacks, we assume it's OK | |
5283 | * until we hear otherwise: | |
5284 | */ | |
5285 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
5286 | } | |
5287 | ||
653e514e BF |
5288 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, |
5289 | int flag) | |
22d38c4c BF |
5290 | { |
5291 | struct file_lock *fl; | |
5292 | ||
5293 | fl = locks_alloc_lock(); | |
5294 | if (!fl) | |
5295 | return NULL; | |
22d38c4c | 5296 | fl->fl_lmops = &nfsd_lease_mng_ops; |
617588d5 | 5297 | fl->fl_flags = FL_DELEG; |
22d38c4c BF |
5298 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; |
5299 | fl->fl_end = OFFSET_MAX; | |
653e514e | 5300 | fl->fl_owner = (fl_owner_t)dp; |
22d38c4c | 5301 | fl->fl_pid = current->tgid; |
eb82dd39 | 5302 | fl->fl_file = dp->dl_stid.sc_file->fi_deleg_file->nf_file; |
22d38c4c BF |
5303 | return fl; |
5304 | } | |
5305 | ||
aba2072f BF |
5306 | static int nfsd4_check_conflicting_opens(struct nfs4_client *clp, |
5307 | struct nfs4_file *fp) | |
5308 | { | |
5309 | struct nfs4_ol_stateid *st; | |
5310 | struct file *f = fp->fi_deleg_file->nf_file; | |
5311 | struct inode *ino = locks_inode(f); | |
5312 | int writes; | |
5313 | ||
5314 | writes = atomic_read(&ino->i_writecount); | |
5315 | if (!writes) | |
5316 | return 0; | |
5317 | /* | |
5318 | * There could be multiple filehandles (hence multiple | |
5319 | * nfs4_files) referencing this file, but that's not too | |
5320 | * common; let's just give up in that case rather than | |
5321 | * trying to go look up all the clients using that other | |
5322 | * nfs4_file as well: | |
5323 | */ | |
5324 | if (fp->fi_aliased) | |
5325 | return -EAGAIN; | |
5326 | /* | |
5327 | * If there's a close in progress, make sure that we see it | |
5328 | * clear any fi_fds[] entries before we see it decrement | |
5329 | * i_writecount: | |
5330 | */ | |
5331 | smp_mb__after_atomic(); | |
5332 | ||
5333 | if (fp->fi_fds[O_WRONLY]) | |
5334 | writes--; | |
5335 | if (fp->fi_fds[O_RDWR]) | |
5336 | writes--; | |
5337 | if (writes > 0) | |
5338 | return -EAGAIN; /* There may be non-NFSv4 writers */ | |
5339 | /* | |
5340 | * It's possible there are non-NFSv4 write opens in progress, | |
5341 | * but if they haven't incremented i_writecount yet then they | |
5342 | * also haven't called break lease yet; so, they'll break this | |
5343 | * lease soon enough. So, all that's left to check for is NFSv4 | |
5344 | * opens: | |
5345 | */ | |
5346 | spin_lock(&fp->fi_lock); | |
5347 | list_for_each_entry(st, &fp->fi_stateids, st_perfile) { | |
5348 | if (st->st_openstp == NULL /* it's an open */ && | |
5349 | access_permit_write(st) && | |
5350 | st->st_stid.sc_client != clp) { | |
5351 | spin_unlock(&fp->fi_lock); | |
5352 | return -EAGAIN; | |
5353 | } | |
5354 | } | |
5355 | spin_unlock(&fp->fi_lock); | |
5356 | /* | |
5357 | * There's a small chance that we could be racing with another | |
5358 | * NFSv4 open. However, any open that hasn't added itself to | |
5359 | * the fi_stateids list also hasn't called break_lease yet; so, | |
5360 | * they'll break this lease soon enough. | |
5361 | */ | |
5362 | return 0; | |
5363 | } | |
5364 | ||
876c553c JL |
5365 | /* |
5366 | * It's possible that between opening the dentry and setting the delegation, | |
5367 | * that it has been renamed or unlinked. Redo the lookup to verify that this | |
5368 | * hasn't happened. | |
5369 | */ | |
5370 | static int | |
5371 | nfsd4_verify_deleg_dentry(struct nfsd4_open *open, struct nfs4_file *fp, | |
5372 | struct svc_fh *parent) | |
5373 | { | |
5374 | struct svc_export *exp; | |
5375 | struct dentry *child; | |
5376 | __be32 err; | |
5377 | ||
876c553c JL |
5378 | err = nfsd_lookup_dentry(open->op_rqstp, parent, |
5379 | open->op_fname, open->op_fnamelen, | |
5380 | &exp, &child); | |
5381 | ||
5382 | if (err) | |
5383 | return -EAGAIN; | |
5384 | ||
5385 | dput(child); | |
5386 | if (child != file_dentry(fp->fi_deleg_file->nf_file)) | |
5387 | return -EAGAIN; | |
5388 | ||
5389 | return 0; | |
5390 | } | |
5391 | ||
0b26693c | 5392 | static struct nfs4_delegation * |
876c553c JL |
5393 | nfs4_set_delegation(struct nfsd4_open *open, struct nfs4_ol_stateid *stp, |
5394 | struct svc_fh *parent) | |
acfdf5c3 | 5395 | { |
68b18f52 | 5396 | int status = 0; |
876c553c JL |
5397 | struct nfs4_client *clp = stp->st_stid.sc_client; |
5398 | struct nfs4_file *fp = stp->st_stid.sc_file; | |
5399 | struct nfs4_clnt_odstate *odstate = stp->st_clnt_odstate; | |
0b26693c | 5400 | struct nfs4_delegation *dp; |
eb82dd39 | 5401 | struct nfsd_file *nf; |
353601e7 | 5402 | struct file_lock *fl; |
417c6629 | 5403 | |
353601e7 BF |
5404 | /* |
5405 | * The fi_had_conflict and nfs_get_existing_delegation checks | |
5406 | * here are just optimizations; we'll need to recheck them at | |
5407 | * the end: | |
5408 | */ | |
bf7bd3e9 | 5409 | if (fp->fi_had_conflict) |
0b26693c JL |
5410 | return ERR_PTR(-EAGAIN); |
5411 | ||
eb82dd39 JL |
5412 | nf = find_readable_file(fp); |
5413 | if (!nf) { | |
aba2072f BF |
5414 | /* |
5415 | * We probably could attempt another open and get a read | |
5416 | * delegation, but for now, don't bother until the | |
5417 | * client actually sends us one. | |
5418 | */ | |
5419 | return ERR_PTR(-EAGAIN); | |
353601e7 | 5420 | } |
34ed9872 AE |
5421 | spin_lock(&state_lock); |
5422 | spin_lock(&fp->fi_lock); | |
68b18f52 BF |
5423 | if (nfs4_delegation_exists(clp, fp)) |
5424 | status = -EAGAIN; | |
353601e7 | 5425 | else if (!fp->fi_deleg_file) { |
eb82dd39 | 5426 | fp->fi_deleg_file = nf; |
353601e7 BF |
5427 | /* increment early to prevent fi_deleg_file from being |
5428 | * cleared */ | |
5429 | fp->fi_delegees = 1; | |
eb82dd39 | 5430 | nf = NULL; |
353601e7 BF |
5431 | } else |
5432 | fp->fi_delegees++; | |
34ed9872 AE |
5433 | spin_unlock(&fp->fi_lock); |
5434 | spin_unlock(&state_lock); | |
eb82dd39 JL |
5435 | if (nf) |
5436 | nfsd_file_put(nf); | |
34ed9872 AE |
5437 | if (status) |
5438 | return ERR_PTR(status); | |
5439 | ||
353601e7 | 5440 | status = -ENOMEM; |
bbf936ed | 5441 | dp = alloc_init_deleg(clp, fp, odstate); |
0b26693c | 5442 | if (!dp) |
353601e7 BF |
5443 | goto out_delegees; |
5444 | ||
5445 | fl = nfs4_alloc_init_lease(dp, NFS4_OPEN_DELEGATE_READ); | |
5446 | if (!fl) | |
bd8d7250 | 5447 | goto out_clnt_odstate; |
353601e7 | 5448 | |
eb82dd39 | 5449 | status = vfs_setlease(fp->fi_deleg_file->nf_file, fl->fl_type, &fl, NULL); |
353601e7 BF |
5450 | if (fl) |
5451 | locks_free_lock(fl); | |
5452 | if (status) | |
5453 | goto out_clnt_odstate; | |
876c553c JL |
5454 | |
5455 | if (parent) { | |
5456 | status = nfsd4_verify_deleg_dentry(open, fp, parent); | |
5457 | if (status) | |
5458 | goto out_unlock; | |
5459 | } | |
5460 | ||
aba2072f BF |
5461 | status = nfsd4_check_conflicting_opens(clp, fp); |
5462 | if (status) | |
5463 | goto out_unlock; | |
0b26693c | 5464 | |
417c6629 JL |
5465 | spin_lock(&state_lock); |
5466 | spin_lock(&fp->fi_lock); | |
353601e7 | 5467 | if (fp->fi_had_conflict) |
417c6629 | 5468 | status = -EAGAIN; |
353601e7 BF |
5469 | else |
5470 | status = hash_delegation_locked(dp, fp); | |
417c6629 | 5471 | spin_unlock(&fp->fi_lock); |
cdc97505 | 5472 | spin_unlock(&state_lock); |
353601e7 BF |
5473 | |
5474 | if (status) | |
692ad280 AE |
5475 | goto out_unlock; |
5476 | ||
0b26693c | 5477 | return dp; |
692ad280 | 5478 | out_unlock: |
eb82dd39 | 5479 | vfs_setlease(fp->fi_deleg_file->nf_file, F_UNLCK, NULL, (void **)&dp); |
353601e7 BF |
5480 | out_clnt_odstate: |
5481 | put_clnt_odstate(dp->dl_clnt_odstate); | |
353601e7 BF |
5482 | nfs4_put_stid(&dp->dl_stid); |
5483 | out_delegees: | |
5484 | put_deleg_file(fp); | |
5485 | return ERR_PTR(status); | |
edab9782 BF |
5486 | } |
5487 | ||
4aa8913c BH |
5488 | static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) |
5489 | { | |
5490 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
5491 | if (status == -EAGAIN) | |
5492 | open->op_why_no_deleg = WND4_CONTENTION; | |
5493 | else { | |
5494 | open->op_why_no_deleg = WND4_RESOURCE; | |
5495 | switch (open->op_deleg_want) { | |
5496 | case NFS4_SHARE_WANT_READ_DELEG: | |
5497 | case NFS4_SHARE_WANT_WRITE_DELEG: | |
5498 | case NFS4_SHARE_WANT_ANY_DELEG: | |
5499 | break; | |
5500 | case NFS4_SHARE_WANT_CANCEL: | |
5501 | open->op_why_no_deleg = WND4_CANCELLED; | |
5502 | break; | |
5503 | case NFS4_SHARE_WANT_NO_DELEG: | |
063b0fb9 | 5504 | WARN_ON_ONCE(1); |
4aa8913c BH |
5505 | } |
5506 | } | |
5507 | } | |
5508 | ||
1da177e4 LT |
5509 | /* |
5510 | * Attempt to hand out a delegation. | |
99c41515 BF |
5511 | * |
5512 | * Note we don't support write delegations, and won't until the vfs has | |
5513 | * proper support for them. | |
1da177e4 LT |
5514 | */ |
5515 | static void | |
876c553c JL |
5516 | nfs4_open_delegation(struct nfsd4_open *open, struct nfs4_ol_stateid *stp, |
5517 | struct svc_fh *currentfh) | |
1da177e4 LT |
5518 | { |
5519 | struct nfs4_delegation *dp; | |
4cf59221 JL |
5520 | struct nfs4_openowner *oo = openowner(stp->st_stateowner); |
5521 | struct nfs4_client *clp = stp->st_stid.sc_client; | |
876c553c | 5522 | struct svc_fh *parent = NULL; |
14a24e99 | 5523 | int cb_up; |
99c41515 | 5524 | int status = 0; |
1da177e4 | 5525 | |
fe0750e5 | 5526 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
7b190fec N |
5527 | open->op_recall = 0; |
5528 | switch (open->op_claim_type) { | |
5529 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 5530 | if (!cb_up) |
7b190fec | 5531 | open->op_recall = 1; |
99c41515 BF |
5532 | if (open->op_delegate_type != NFS4_OPEN_DELEGATE_READ) |
5533 | goto out_no_deleg; | |
7b190fec N |
5534 | break; |
5535 | case NFS4_OPEN_CLAIM_NULL: | |
876c553c JL |
5536 | parent = currentfh; |
5537 | fallthrough; | |
ed47b062 | 5538 | case NFS4_OPEN_CLAIM_FH: |
99c41515 BF |
5539 | /* |
5540 | * Let's not give out any delegations till everyone's | |
c87fb4a3 BF |
5541 | * had the chance to reclaim theirs, *and* until |
5542 | * NLM locks have all been reclaimed: | |
99c41515 | 5543 | */ |
4cf59221 | 5544 | if (locks_in_grace(clp->net)) |
99c41515 | 5545 | goto out_no_deleg; |
dad1c067 | 5546 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
99c41515 | 5547 | goto out_no_deleg; |
7b190fec N |
5548 | break; |
5549 | default: | |
99c41515 | 5550 | goto out_no_deleg; |
7b190fec | 5551 | } |
876c553c | 5552 | dp = nfs4_set_delegation(open, stp, parent); |
0b26693c | 5553 | if (IS_ERR(dp)) |
dd239cc0 | 5554 | goto out_no_deleg; |
1da177e4 | 5555 | |
d5477a8d | 5556 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 5557 | |
3caf9175 | 5558 | trace_nfsd_deleg_read(&dp->dl_stid.sc_stateid); |
99c41515 | 5559 | open->op_delegate_type = NFS4_OPEN_DELEGATE_READ; |
67cb1279 | 5560 | nfs4_put_stid(&dp->dl_stid); |
dd239cc0 | 5561 | return; |
dd239cc0 | 5562 | out_no_deleg: |
99c41515 BF |
5563 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE; |
5564 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && | |
d08d32e6 | 5565 | open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) { |
99c41515 | 5566 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
d08d32e6 BF |
5567 | open->op_recall = 1; |
5568 | } | |
99c41515 BF |
5569 | |
5570 | /* 4.1 client asking for a delegation? */ | |
5571 | if (open->op_deleg_want) | |
5572 | nfsd4_open_deleg_none_ext(open, status); | |
5573 | return; | |
1da177e4 LT |
5574 | } |
5575 | ||
e27f49c3 BH |
5576 | static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, |
5577 | struct nfs4_delegation *dp) | |
5578 | { | |
5579 | if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && | |
5580 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
5581 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
5582 | open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; | |
5583 | } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && | |
5584 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
5585 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
5586 | open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; | |
5587 | } | |
5588 | /* Otherwise the client must be confused wanting a delegation | |
5589 | * it already has, therefore we don't return | |
5590 | * NFS4_OPEN_DELEGATE_NONE_EXT and reason. | |
5591 | */ | |
5592 | } | |
5593 | ||
7e2ce0cc CL |
5594 | /** |
5595 | * nfsd4_process_open2 - finish open processing | |
5596 | * @rqstp: the RPC transaction being executed | |
5597 | * @current_fh: NFSv4 COMPOUND's current filehandle | |
5598 | * @open: OPEN arguments | |
5599 | * | |
5600 | * If successful, (1) truncate the file if open->op_truncate was | |
5601 | * set, (2) set open->op_stateid, (3) set open->op_delegation. | |
5602 | * | |
5603 | * Returns %nfs_ok on success; otherwise an nfs4stat value in | |
5604 | * network byte order is returned. | |
5605 | */ | |
b37ad28b | 5606 | __be32 |
1da177e4 LT |
5607 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
5608 | { | |
6668958f | 5609 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
38c2f4b1 | 5610 | struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; |
1da177e4 | 5611 | struct nfs4_file *fp = NULL; |
dcef0413 | 5612 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 5613 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 5614 | __be32 status; |
d8a1a000 | 5615 | bool new_stp = false; |
1da177e4 | 5616 | |
1da177e4 LT |
5617 | /* |
5618 | * Lookup file; if found, lookup stateid and check open request, | |
5619 | * and check for delegations in the process of being recalled. | |
5620 | * If not found, create the nfs4_file struct | |
5621 | */ | |
f9b60e22 | 5622 | fp = find_or_add_file(open->op_file, current_fh); |
950e0118 | 5623 | if (fp != open->op_file) { |
41d22663 | 5624 | status = nfs4_check_deleg(cl, open, &dp); |
c44c5eeb N |
5625 | if (status) |
5626 | goto out; | |
15ca08d3 | 5627 | stp = nfsd4_find_and_lock_existing_open(fp, open); |
1da177e4 | 5628 | } else { |
950e0118 | 5629 | open->op_file = NULL; |
c44c5eeb | 5630 | status = nfserr_bad_stateid; |
8b289b2c | 5631 | if (nfsd4_is_deleg_cur(open)) |
c44c5eeb | 5632 | goto out; |
1da177e4 LT |
5633 | } |
5634 | ||
d8a1a000 TM |
5635 | if (!stp) { |
5636 | stp = init_open_stateid(fp, open); | |
5637 | if (!open->op_stp) | |
5638 | new_stp = true; | |
5639 | } | |
5640 | ||
1da177e4 LT |
5641 | /* |
5642 | * OPEN the file, or upgrade an existing OPEN. | |
5643 | * If truncate fails, the OPEN fails. | |
d8a1a000 TM |
5644 | * |
5645 | * stp is already locked. | |
1da177e4 | 5646 | */ |
d8a1a000 | 5647 | if (!new_stp) { |
1da177e4 | 5648 | /* Stateid was found, this is an OPEN upgrade */ |
f9d7562f | 5649 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
35a92fe8 | 5650 | if (status) { |
feb9dad5 | 5651 | mutex_unlock(&stp->st_mutex); |
1da177e4 | 5652 | goto out; |
35a92fe8 | 5653 | } |
1da177e4 | 5654 | } else { |
3d694271 | 5655 | status = nfs4_get_vfs_file(rqstp, fp, current_fh, stp, open, true); |
6eb3a1d0 | 5656 | if (status) { |
d8a1a000 | 5657 | stp->st_stid.sc_type = NFS4_CLOSED_STID; |
6eb3a1d0 | 5658 | release_open_stateid(stp); |
d8a1a000 | 5659 | mutex_unlock(&stp->st_mutex); |
6eb3a1d0 JL |
5660 | goto out; |
5661 | } | |
8287f009 SB |
5662 | |
5663 | stp->st_clnt_odstate = find_or_hash_clnt_odstate(fp, | |
5664 | open->op_odstate); | |
5665 | if (stp->st_clnt_odstate == open->op_odstate) | |
5666 | open->op_odstate = NULL; | |
1da177e4 | 5667 | } |
d8a1a000 | 5668 | |
9767feb2 | 5669 | nfs4_inc_and_copy_stateid(&open->op_stateid, &stp->st_stid); |
feb9dad5 | 5670 | mutex_unlock(&stp->st_mutex); |
1da177e4 | 5671 | |
d24433cd | 5672 | if (nfsd4_has_session(&resp->cstate)) { |
d24433cd BH |
5673 | if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { |
5674 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
5675 | open->op_why_no_deleg = WND4_NOT_WANTED; | |
5676 | goto nodeleg; | |
5677 | } | |
5678 | } | |
5679 | ||
1da177e4 LT |
5680 | /* |
5681 | * Attempt to hand out a delegation. No error return, because the | |
5682 | * OPEN succeeds even if we fail. | |
5683 | */ | |
876c553c | 5684 | nfs4_open_delegation(open, stp, &resp->cstate.current_fh); |
d24433cd | 5685 | nodeleg: |
1da177e4 | 5686 | status = nfs_ok; |
3caf9175 | 5687 | trace_nfsd_open(&stp->st_stid.sc_stateid); |
1da177e4 | 5688 | out: |
d24433cd BH |
5689 | /* 4.1 client trying to upgrade/downgrade delegation? */ |
5690 | if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && | |
e27f49c3 BH |
5691 | open->op_deleg_want) |
5692 | nfsd4_deleg_xgrade_none_ext(open, dp); | |
d24433cd | 5693 | |
13cd2184 N |
5694 | if (fp) |
5695 | put_nfs4_file(fp); | |
37515177 | 5696 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
87186022 | 5697 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
1da177e4 LT |
5698 | /* |
5699 | * To finish the open response, we just need to set the rflags. | |
5700 | */ | |
5701 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
19e4c347 JL |
5702 | if (nfsd4_has_session(&resp->cstate)) |
5703 | open->op_rflags |= NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK; | |
5704 | else if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED)) | |
1da177e4 | 5705 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
19e4c347 | 5706 | |
dcd94cc2 TM |
5707 | if (dp) |
5708 | nfs4_put_stid(&dp->dl_stid); | |
d6f2bc5d TM |
5709 | if (stp) |
5710 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 LT |
5711 | |
5712 | return status; | |
5713 | } | |
5714 | ||
58fb12e6 | 5715 | void nfsd4_cleanup_open_state(struct nfsd4_compound_state *cstate, |
42297899 | 5716 | struct nfsd4_open *open) |
d29b20cd BF |
5717 | { |
5718 | if (open->op_openowner) { | |
d3134b10 JL |
5719 | struct nfs4_stateowner *so = &open->op_openowner->oo_owner; |
5720 | ||
5721 | nfsd4_cstate_assign_replay(cstate, so); | |
5722 | nfs4_put_stateowner(so); | |
d29b20cd | 5723 | } |
32513b40 | 5724 | if (open->op_file) |
5b095e99 | 5725 | kmem_cache_free(file_slab, open->op_file); |
4cdc951b | 5726 | if (open->op_stp) |
6011695d | 5727 | nfs4_put_stid(&open->op_stp->st_stid); |
8287f009 SB |
5728 | if (open->op_odstate) |
5729 | kmem_cache_free(odstate_slab, open->op_odstate); | |
d29b20cd BF |
5730 | } |
5731 | ||
b37ad28b | 5732 | __be32 |
b591480b | 5733 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 5734 | union nfsd4_op_u *u) |
1da177e4 | 5735 | { |
eb69853d | 5736 | clientid_t *clid = &u->renew; |
1da177e4 | 5737 | struct nfs4_client *clp; |
b37ad28b | 5738 | __be32 status; |
7f2210fa | 5739 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 5740 | |
dd5e3fbc | 5741 | trace_nfsd_clid_renew(clid); |
f71475ba | 5742 | status = set_client(clid, cstate, nn); |
9b2ef62b | 5743 | if (status) |
b4587eb2 | 5744 | return status; |
4b24ca7d | 5745 | clp = cstate->clp; |
ea1da636 | 5746 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 5747 | && clp->cl_cb_state != NFSD4_CB_UP) |
b4587eb2 BF |
5748 | return nfserr_cb_path_down; |
5749 | return nfs_ok; | |
1da177e4 LT |
5750 | } |
5751 | ||
7f5ef2e9 | 5752 | void |
12760c66 | 5753 | nfsd4_end_grace(struct nfsd_net *nn) |
a76b4319 | 5754 | { |
33dcc481 | 5755 | /* do nothing if grace period already ended */ |
a51c84ed | 5756 | if (nn->grace_ended) |
33dcc481 JL |
5757 | return; |
5758 | ||
dd5e3fbc | 5759 | trace_nfsd_grace_complete(nn); |
a51c84ed | 5760 | nn->grace_ended = true; |
70b28235 BF |
5761 | /* |
5762 | * If the server goes down again right now, an NFSv4 | |
5763 | * client will still be allowed to reclaim after it comes back up, | |
5764 | * even if it hasn't yet had a chance to reclaim state this time. | |
5765 | * | |
5766 | */ | |
919b8049 | 5767 | nfsd4_record_grace_done(nn); |
70b28235 BF |
5768 | /* |
5769 | * At this point, NFSv4 clients can still reclaim. But if the | |
5770 | * server crashes, any that have not yet reclaimed will be out | |
5771 | * of luck on the next boot. | |
5772 | * | |
5773 | * (NFSv4.1+ clients are considered to have reclaimed once they | |
5774 | * call RECLAIM_COMPLETE. NFSv4.0 clients are considered to | |
5775 | * have reclaimed after their first OPEN.) | |
5776 | */ | |
5e1533c7 | 5777 | locks_end_grace(&nn->nfsd4_manager); |
70b28235 BF |
5778 | /* |
5779 | * At this point, and once lockd and/or any other containers | |
5780 | * exit their grace period, further reclaims will fail and | |
5781 | * regular locking can resume. | |
5782 | */ | |
a76b4319 N |
5783 | } |
5784 | ||
03f318ca BF |
5785 | /* |
5786 | * If we've waited a lease period but there are still clients trying to | |
5787 | * reclaim, wait a little longer to give them a chance to finish. | |
5788 | */ | |
5789 | static bool clients_still_reclaiming(struct nfsd_net *nn) | |
5790 | { | |
20b7d86f AB |
5791 | time64_t double_grace_period_end = nn->boot_time + |
5792 | 2 * nn->nfsd4_lease; | |
03f318ca | 5793 | |
362063a5 SM |
5794 | if (nn->track_reclaim_completes && |
5795 | atomic_read(&nn->nr_reclaim_complete) == | |
5796 | nn->reclaim_str_hashtbl_size) | |
5797 | return false; | |
03f318ca BF |
5798 | if (!nn->somebody_reclaimed) |
5799 | return false; | |
5800 | nn->somebody_reclaimed = false; | |
5801 | /* | |
5802 | * If we've given them *two* lease times to reclaim, and they're | |
5803 | * still not done, give up: | |
5804 | */ | |
20b7d86f | 5805 | if (ktime_get_boottime_seconds() > double_grace_period_end) |
03f318ca BF |
5806 | return false; |
5807 | return true; | |
5808 | } | |
5809 | ||
7f7e7a40 BF |
5810 | struct laundry_time { |
5811 | time64_t cutoff; | |
5812 | time64_t new_timeo; | |
5813 | }; | |
5814 | ||
5815 | static bool state_expired(struct laundry_time *lt, time64_t last_refresh) | |
5816 | { | |
5817 | time64_t time_remaining; | |
5818 | ||
5819 | if (last_refresh < lt->cutoff) | |
5820 | return true; | |
5821 | time_remaining = last_refresh - lt->cutoff; | |
5822 | lt->new_timeo = min(lt->new_timeo, time_remaining); | |
5823 | return false; | |
5824 | } | |
5825 | ||
f4e44b39 DN |
5826 | #ifdef CONFIG_NFSD_V4_2_INTER_SSC |
5827 | void nfsd4_ssc_init_umount_work(struct nfsd_net *nn) | |
5828 | { | |
5829 | spin_lock_init(&nn->nfsd_ssc_lock); | |
5830 | INIT_LIST_HEAD(&nn->nfsd_ssc_mount_list); | |
5831 | init_waitqueue_head(&nn->nfsd_ssc_waitq); | |
5832 | } | |
5833 | EXPORT_SYMBOL_GPL(nfsd4_ssc_init_umount_work); | |
5834 | ||
5835 | /* | |
5836 | * This is called when nfsd is being shutdown, after all inter_ssc | |
5837 | * cleanup were done, to destroy the ssc delayed unmount list. | |
5838 | */ | |
5839 | static void nfsd4_ssc_shutdown_umount(struct nfsd_net *nn) | |
5840 | { | |
f47dc2d3 | 5841 | struct nfsd4_ssc_umount_item *ni = NULL; |
f4e44b39 DN |
5842 | struct nfsd4_ssc_umount_item *tmp; |
5843 | ||
5844 | spin_lock(&nn->nfsd_ssc_lock); | |
5845 | list_for_each_entry_safe(ni, tmp, &nn->nfsd_ssc_mount_list, nsui_list) { | |
5846 | list_del(&ni->nsui_list); | |
5847 | spin_unlock(&nn->nfsd_ssc_lock); | |
5848 | mntput(ni->nsui_vfsmount); | |
5849 | kfree(ni); | |
5850 | spin_lock(&nn->nfsd_ssc_lock); | |
5851 | } | |
5852 | spin_unlock(&nn->nfsd_ssc_lock); | |
5853 | } | |
5854 | ||
5855 | static void nfsd4_ssc_expire_umount(struct nfsd_net *nn) | |
5856 | { | |
5857 | bool do_wakeup = false; | |
8e70bf27 | 5858 | struct nfsd4_ssc_umount_item *ni = NULL; |
f4e44b39 DN |
5859 | struct nfsd4_ssc_umount_item *tmp; |
5860 | ||
5861 | spin_lock(&nn->nfsd_ssc_lock); | |
5862 | list_for_each_entry_safe(ni, tmp, &nn->nfsd_ssc_mount_list, nsui_list) { | |
5863 | if (time_after(jiffies, ni->nsui_expire)) { | |
5864 | if (refcount_read(&ni->nsui_refcnt) > 1) | |
5865 | continue; | |
5866 | ||
5867 | /* mark being unmount */ | |
5868 | ni->nsui_busy = true; | |
5869 | spin_unlock(&nn->nfsd_ssc_lock); | |
5870 | mntput(ni->nsui_vfsmount); | |
5871 | spin_lock(&nn->nfsd_ssc_lock); | |
5872 | ||
5873 | /* waiters need to start from begin of list */ | |
5874 | list_del(&ni->nsui_list); | |
5875 | kfree(ni); | |
5876 | ||
5877 | /* wakeup ssc_connect waiters */ | |
5878 | do_wakeup = true; | |
5879 | continue; | |
5880 | } | |
5881 | break; | |
5882 | } | |
5883 | if (do_wakeup) | |
5884 | wake_up_all(&nn->nfsd_ssc_waitq); | |
5885 | spin_unlock(&nn->nfsd_ssc_lock); | |
5886 | } | |
5887 | #endif | |
5888 | ||
27431aff | 5889 | /* Check if any lock belonging to this lockowner has any blockers */ |
3d694271 | 5890 | static bool |
27431aff DN |
5891 | nfs4_lockowner_has_blockers(struct nfs4_lockowner *lo) |
5892 | { | |
5893 | struct file_lock_context *ctx; | |
5894 | struct nfs4_ol_stateid *stp; | |
5895 | struct nfs4_file *nf; | |
5896 | ||
5897 | list_for_each_entry(stp, &lo->lo_owner.so_stateids, st_perstateowner) { | |
5898 | nf = stp->st_stid.sc_file; | |
5899 | ctx = nf->fi_inode->i_flctx; | |
5900 | if (!ctx) | |
5901 | continue; | |
5902 | if (locks_owner_has_blockers(ctx, lo)) | |
5903 | return true; | |
5904 | } | |
5905 | return false; | |
5906 | } | |
5907 | ||
5908 | static bool | |
5909 | nfs4_anylock_blockers(struct nfs4_client *clp) | |
3d694271 DN |
5910 | { |
5911 | int i; | |
5912 | struct nfs4_stateowner *so; | |
27431aff | 5913 | struct nfs4_lockowner *lo; |
3d694271 | 5914 | |
27431aff DN |
5915 | if (atomic_read(&clp->cl_delegs_in_recall)) |
5916 | return true; | |
3d694271 DN |
5917 | spin_lock(&clp->cl_lock); |
5918 | for (i = 0; i < OWNER_HASH_SIZE; i++) { | |
5919 | list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[i], | |
5920 | so_strhash) { | |
5921 | if (so->so_is_open_owner) | |
5922 | continue; | |
27431aff DN |
5923 | lo = lockowner(so); |
5924 | if (nfs4_lockowner_has_blockers(lo)) { | |
5925 | spin_unlock(&clp->cl_lock); | |
5926 | return true; | |
5927 | } | |
3d694271 DN |
5928 | } |
5929 | } | |
5930 | spin_unlock(&clp->cl_lock); | |
5931 | return false; | |
5932 | } | |
5933 | ||
66af2579 DN |
5934 | static void |
5935 | nfs4_get_client_reaplist(struct nfsd_net *nn, struct list_head *reaplist, | |
5936 | struct laundry_time *lt) | |
5937 | { | |
4271c2c0 | 5938 | unsigned int maxreap, reapcnt = 0; |
66af2579 DN |
5939 | struct list_head *pos, *next; |
5940 | struct nfs4_client *clp; | |
5941 | ||
4271c2c0 DN |
5942 | maxreap = (atomic_read(&nn->nfs4_client_count) >= nn->nfs4_max_clients) ? |
5943 | NFSD_CLIENT_MAX_TRIM_PER_RUN : 0; | |
66af2579 DN |
5944 | INIT_LIST_HEAD(reaplist); |
5945 | spin_lock(&nn->client_lock); | |
5946 | list_for_each_safe(pos, next, &nn->client_lru) { | |
5947 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
5948 | if (clp->cl_state == NFSD4_EXPIRABLE) | |
5949 | goto exp_client; | |
5950 | if (!state_expired(lt, clp->cl_time)) | |
5951 | break; | |
3a4ea23d DN |
5952 | if (!atomic_read(&clp->cl_rpc_users)) { |
5953 | if (clp->cl_state == NFSD4_ACTIVE) | |
5954 | atomic_inc(&nn->nfsd_courtesy_clients); | |
66af2579 | 5955 | clp->cl_state = NFSD4_COURTESY; |
3a4ea23d | 5956 | } |
4271c2c0 | 5957 | if (!client_has_state(clp)) |
66af2579 | 5958 | goto exp_client; |
4271c2c0 DN |
5959 | if (!nfs4_anylock_blockers(clp)) |
5960 | if (reapcnt >= maxreap) | |
5961 | continue; | |
66af2579 | 5962 | exp_client: |
4271c2c0 DN |
5963 | if (!mark_client_expired_locked(clp)) { |
5964 | list_add(&clp->cl_lru, reaplist); | |
5965 | reapcnt++; | |
66af2579 DN |
5966 | } |
5967 | } | |
5968 | spin_unlock(&nn->client_lock); | |
5969 | } | |
5970 | ||
7746b32f DN |
5971 | static void |
5972 | nfs4_get_courtesy_client_reaplist(struct nfsd_net *nn, | |
5973 | struct list_head *reaplist) | |
5974 | { | |
5975 | unsigned int maxreap = 0, reapcnt = 0; | |
5976 | struct list_head *pos, *next; | |
5977 | struct nfs4_client *clp; | |
5978 | ||
5979 | maxreap = NFSD_CLIENT_MAX_TRIM_PER_RUN; | |
5980 | INIT_LIST_HEAD(reaplist); | |
5981 | ||
5982 | spin_lock(&nn->client_lock); | |
5983 | list_for_each_safe(pos, next, &nn->client_lru) { | |
5984 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
5985 | if (clp->cl_state == NFSD4_ACTIVE) | |
5986 | break; | |
5987 | if (reapcnt >= maxreap) | |
5988 | break; | |
5989 | if (!mark_client_expired_locked(clp)) { | |
5990 | list_add(&clp->cl_lru, reaplist); | |
5991 | reapcnt++; | |
5992 | } | |
5993 | } | |
5994 | spin_unlock(&nn->client_lock); | |
5995 | } | |
5996 | ||
5997 | static void | |
5998 | nfs4_process_client_reaplist(struct list_head *reaplist) | |
5999 | { | |
6000 | struct list_head *pos, *next; | |
6001 | struct nfs4_client *clp; | |
6002 | ||
6003 | list_for_each_safe(pos, next, reaplist) { | |
6004 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
6005 | trace_nfsd_clid_purged(&clp->cl_clientid); | |
6006 | list_del_init(&clp->cl_lru); | |
6007 | expire_client(clp); | |
6008 | } | |
6009 | } | |
6010 | ||
20b7d86f | 6011 | static time64_t |
09121281 | 6012 | nfs4_laundromat(struct nfsd_net *nn) |
1da177e4 | 6013 | { |
fe0750e5 | 6014 | struct nfs4_openowner *oo; |
1da177e4 | 6015 | struct nfs4_delegation *dp; |
217526e7 | 6016 | struct nfs4_ol_stateid *stp; |
7919d0a2 | 6017 | struct nfsd4_blocked_lock *nbl; |
1da177e4 | 6018 | struct list_head *pos, *next, reaplist; |
7f7e7a40 BF |
6019 | struct laundry_time lt = { |
6020 | .cutoff = ktime_get_boottime_seconds() - nn->nfsd4_lease, | |
6021 | .new_timeo = nn->nfsd4_lease | |
6022 | }; | |
624322f1 OK |
6023 | struct nfs4_cpntf_state *cps; |
6024 | copy_stateid_t *cps_t; | |
6025 | int i; | |
1da177e4 | 6026 | |
03f318ca | 6027 | if (clients_still_reclaiming(nn)) { |
7f7e7a40 | 6028 | lt.new_timeo = 0; |
03f318ca BF |
6029 | goto out; |
6030 | } | |
12760c66 | 6031 | nfsd4_end_grace(nn); |
624322f1 OK |
6032 | |
6033 | spin_lock(&nn->s2s_cp_lock); | |
6034 | idr_for_each_entry(&nn->s2s_cp_stateids, cps_t, i) { | |
6035 | cps = container_of(cps_t, struct nfs4_cpntf_state, cp_stateid); | |
781fde1a | 6036 | if (cps->cp_stateid.cs_type == NFS4_COPYNOTIFY_STID && |
7f7e7a40 | 6037 | state_expired(<, cps->cpntf_time)) |
624322f1 OK |
6038 | _free_cpntf_state_locked(nn, cps); |
6039 | } | |
6040 | spin_unlock(&nn->s2s_cp_lock); | |
66af2579 | 6041 | nfs4_get_client_reaplist(nn, &reaplist, <); |
7746b32f DN |
6042 | nfs4_process_client_reaplist(&reaplist); |
6043 | ||
cdc97505 | 6044 | spin_lock(&state_lock); |
e8c69d17 | 6045 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 | 6046 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
7f7e7a40 | 6047 | if (!state_expired(<, dp->dl_time)) |
1da177e4 | 6048 | break; |
3fcbbd24 | 6049 | WARN_ON(!unhash_delegation_locked(dp)); |
42690676 | 6050 | list_add(&dp->dl_recall_lru, &reaplist); |
1da177e4 | 6051 | } |
cdc97505 | 6052 | spin_unlock(&state_lock); |
2d4a532d JL |
6053 | while (!list_empty(&reaplist)) { |
6054 | dp = list_first_entry(&reaplist, struct nfs4_delegation, | |
6055 | dl_recall_lru); | |
6056 | list_del_init(&dp->dl_recall_lru); | |
3bd64a5b | 6057 | revoke_delegation(dp); |
1da177e4 | 6058 | } |
217526e7 JL |
6059 | |
6060 | spin_lock(&nn->client_lock); | |
6061 | while (!list_empty(&nn->close_lru)) { | |
6062 | oo = list_first_entry(&nn->close_lru, struct nfs4_openowner, | |
6063 | oo_close_lru); | |
7f7e7a40 | 6064 | if (!state_expired(<, oo->oo_time)) |
1da177e4 | 6065 | break; |
217526e7 JL |
6066 | list_del_init(&oo->oo_close_lru); |
6067 | stp = oo->oo_last_closed_stid; | |
6068 | oo->oo_last_closed_stid = NULL; | |
6069 | spin_unlock(&nn->client_lock); | |
6070 | nfs4_put_stid(&stp->st_stid); | |
6071 | spin_lock(&nn->client_lock); | |
1da177e4 | 6072 | } |
217526e7 JL |
6073 | spin_unlock(&nn->client_lock); |
6074 | ||
7919d0a2 JL |
6075 | /* |
6076 | * It's possible for a client to try and acquire an already held lock | |
6077 | * that is being held for a long time, and then lose interest in it. | |
6078 | * So, we clean out any un-revisited request after a lease period | |
6079 | * under the assumption that the client is no longer interested. | |
6080 | * | |
6081 | * RFC5661, sec. 9.6 states that the client must not rely on getting | |
6082 | * notifications and must continue to poll for locks, even when the | |
6083 | * server supports them. Thus this shouldn't lead to clients blocking | |
6084 | * indefinitely once the lock does become free. | |
6085 | */ | |
6086 | BUG_ON(!list_empty(&reaplist)); | |
0cc11a61 | 6087 | spin_lock(&nn->blocked_locks_lock); |
7919d0a2 JL |
6088 | while (!list_empty(&nn->blocked_locks_lru)) { |
6089 | nbl = list_first_entry(&nn->blocked_locks_lru, | |
6090 | struct nfsd4_blocked_lock, nbl_lru); | |
7f7e7a40 | 6091 | if (!state_expired(<, nbl->nbl_time)) |
7919d0a2 | 6092 | break; |
7919d0a2 JL |
6093 | list_move(&nbl->nbl_lru, &reaplist); |
6094 | list_del_init(&nbl->nbl_list); | |
6095 | } | |
0cc11a61 | 6096 | spin_unlock(&nn->blocked_locks_lock); |
7919d0a2 JL |
6097 | |
6098 | while (!list_empty(&reaplist)) { | |
64ebe124 | 6099 | nbl = list_first_entry(&reaplist, |
7919d0a2 JL |
6100 | struct nfsd4_blocked_lock, nbl_lru); |
6101 | list_del_init(&nbl->nbl_lru); | |
7919d0a2 JL |
6102 | free_blocked_lock(nbl); |
6103 | } | |
f4e44b39 DN |
6104 | #ifdef CONFIG_NFSD_V4_2_INTER_SSC |
6105 | /* service the server-to-server copy delayed unmount list */ | |
6106 | nfsd4_ssc_expire_umount(nn); | |
6107 | #endif | |
03f318ca | 6108 | out: |
7f7e7a40 | 6109 | return max_t(time64_t, lt.new_timeo, NFSD_LAUNDROMAT_MINTIMEOUT); |
1da177e4 LT |
6110 | } |
6111 | ||
a254b246 | 6112 | static void laundromat_main(struct work_struct *); |
a254b246 HH |
6113 | |
6114 | static void | |
09121281 | 6115 | laundromat_main(struct work_struct *laundry) |
1da177e4 | 6116 | { |
20b7d86f | 6117 | time64_t t; |
2e55f3ab | 6118 | struct delayed_work *dwork = to_delayed_work(laundry); |
09121281 SK |
6119 | struct nfsd_net *nn = container_of(dwork, struct nfsd_net, |
6120 | laundromat_work); | |
1da177e4 | 6121 | |
09121281 | 6122 | t = nfs4_laundromat(nn); |
09121281 | 6123 | queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ); |
1da177e4 LT |
6124 | } |
6125 | ||
7746b32f DN |
6126 | static void |
6127 | courtesy_client_reaper(struct work_struct *reaper) | |
6128 | { | |
6129 | struct list_head reaplist; | |
6130 | struct delayed_work *dwork = to_delayed_work(reaper); | |
6131 | struct nfsd_net *nn = container_of(dwork, struct nfsd_net, | |
6132 | nfsd_shrinker_work); | |
6133 | ||
6134 | nfs4_get_courtesy_client_reaplist(nn, &reaplist); | |
6135 | nfs4_process_client_reaplist(&reaplist); | |
6136 | } | |
6137 | ||
8fcd461d | 6138 | static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stid *stp) |
1da177e4 | 6139 | { |
8fcd461d | 6140 | if (!fh_match(&fhp->fh_handle, &stp->sc_file->fi_fhandle)) |
f7a4d872 BF |
6141 | return nfserr_bad_stateid; |
6142 | return nfs_ok; | |
1da177e4 LT |
6143 | } |
6144 | ||
1da177e4 | 6145 | static |
dcef0413 | 6146 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
1da177e4 | 6147 | { |
b37ad28b | 6148 | __be32 status = nfserr_openmode; |
1da177e4 | 6149 | |
02921914 BF |
6150 | /* For lock stateid's, we test the parent open, not the lock: */ |
6151 | if (stp->st_openstp) | |
6152 | stp = stp->st_openstp; | |
82c5ff1b | 6153 | if ((flags & WR_STATE) && !access_permit_write(stp)) |
1da177e4 | 6154 | goto out; |
82c5ff1b | 6155 | if ((flags & RD_STATE) && !access_permit_read(stp)) |
1da177e4 LT |
6156 | goto out; |
6157 | status = nfs_ok; | |
6158 | out: | |
6159 | return status; | |
6160 | } | |
6161 | ||
b37ad28b | 6162 | static inline __be32 |
5ccb0066 | 6163 | check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags) |
1da177e4 | 6164 | { |
203a8c8e | 6165 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 6166 | return nfs_ok; |
c87fb4a3 | 6167 | else if (opens_in_grace(net)) { |
25985edc | 6168 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
6169 | * conflicting state; so we must wait out the grace period. */ |
6170 | return nfserr_grace; | |
6171 | } else if (flags & WR_STATE) | |
6172 | return nfs4_share_conflict(current_fh, | |
6173 | NFS4_SHARE_DENY_WRITE); | |
6174 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
6175 | return nfs4_share_conflict(current_fh, | |
6176 | NFS4_SHARE_DENY_READ); | |
6177 | } | |
6178 | ||
57b7b43b | 6179 | static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 6180 | { |
6668958f AA |
6181 | /* |
6182 | * When sessions are used the stateid generation number is ignored | |
6183 | * when it is zero. | |
6184 | */ | |
28dde241 | 6185 | if (has_session && in->si_generation == 0) |
81b82965 BF |
6186 | return nfs_ok; |
6187 | ||
6188 | if (in->si_generation == ref->si_generation) | |
6189 | return nfs_ok; | |
6668958f | 6190 | |
0836f587 | 6191 | /* If the client sends us a stateid from the future, it's buggy: */ |
14b7f4a1 | 6192 | if (nfsd4_stateid_generation_after(in, ref)) |
0836f587 BF |
6193 | return nfserr_bad_stateid; |
6194 | /* | |
81b82965 BF |
6195 | * However, we could see a stateid from the past, even from a |
6196 | * non-buggy client. For example, if the client sends a lock | |
6197 | * while some IO is outstanding, the lock may bump si_generation | |
6198 | * while the IO is still in flight. The client could avoid that | |
6199 | * situation by waiting for responses on all the IO requests, | |
6200 | * but better performance may result in retrying IO that | |
6201 | * receives an old_stateid error if requests are rarely | |
6202 | * reordered in flight: | |
0836f587 | 6203 | */ |
81b82965 | 6204 | return nfserr_old_stateid; |
0836f587 BF |
6205 | } |
6206 | ||
03da3169 TM |
6207 | static __be32 nfsd4_stid_check_stateid_generation(stateid_t *in, struct nfs4_stid *s, bool has_session) |
6208 | { | |
6209 | __be32 ret; | |
6210 | ||
6211 | spin_lock(&s->sc_lock); | |
6212 | ret = nfsd4_verify_open_stid(s); | |
6213 | if (ret == nfs_ok) | |
6214 | ret = check_stateid_generation(in, &s->sc_stateid, has_session); | |
6215 | spin_unlock(&s->sc_lock); | |
6216 | return ret; | |
6217 | } | |
6218 | ||
ebe9cb3b CH |
6219 | static __be32 nfsd4_check_openowner_confirmed(struct nfs4_ol_stateid *ols) |
6220 | { | |
6221 | if (ols->st_stateowner->so_is_open_owner && | |
6222 | !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) | |
6223 | return nfserr_bad_stateid; | |
6224 | return nfs_ok; | |
6225 | } | |
6226 | ||
7df302f7 | 6227 | static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) |
17456804 | 6228 | { |
97b7e3b6 | 6229 | struct nfs4_stid *s; |
1af71cc8 | 6230 | __be32 status = nfserr_bad_stateid; |
17456804 | 6231 | |
ae254dac AE |
6232 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid) || |
6233 | CLOSE_STATEID(stateid)) | |
1af71cc8 | 6234 | return status; |
663e36f0 | 6235 | if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) |
1af71cc8 | 6236 | return status; |
1af71cc8 JL |
6237 | spin_lock(&cl->cl_lock); |
6238 | s = find_stateid_locked(cl, stateid); | |
97b7e3b6 | 6239 | if (!s) |
1af71cc8 | 6240 | goto out_unlock; |
03da3169 | 6241 | status = nfsd4_stid_check_stateid_generation(stateid, s, 1); |
17456804 | 6242 | if (status) |
1af71cc8 | 6243 | goto out_unlock; |
23340032 BF |
6244 | switch (s->sc_type) { |
6245 | case NFS4_DELEG_STID: | |
1af71cc8 JL |
6246 | status = nfs_ok; |
6247 | break; | |
3bd64a5b | 6248 | case NFS4_REVOKED_DELEG_STID: |
1af71cc8 JL |
6249 | status = nfserr_deleg_revoked; |
6250 | break; | |
23340032 BF |
6251 | case NFS4_OPEN_STID: |
6252 | case NFS4_LOCK_STID: | |
ebe9cb3b | 6253 | status = nfsd4_check_openowner_confirmed(openlockstateid(s)); |
1af71cc8 | 6254 | break; |
23340032 BF |
6255 | default: |
6256 | printk("unknown stateid type %x\n", s->sc_type); | |
df561f66 | 6257 | fallthrough; |
23340032 | 6258 | case NFS4_CLOSED_STID: |
b0fc29d6 | 6259 | case NFS4_CLOSED_DELEG_STID: |
1af71cc8 | 6260 | status = nfserr_bad_stateid; |
23340032 | 6261 | } |
1af71cc8 JL |
6262 | out_unlock: |
6263 | spin_unlock(&cl->cl_lock); | |
6264 | return status; | |
17456804 BS |
6265 | } |
6266 | ||
cd61c522 | 6267 | __be32 |
2dd6e458 TM |
6268 | nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate, |
6269 | stateid_t *stateid, unsigned char typemask, | |
6270 | struct nfs4_stid **s, struct nfsd_net *nn) | |
38c2f4b1 | 6271 | { |
0eb6f20a | 6272 | __be32 status; |
4d01416a | 6273 | struct nfs4_stid *stid; |
95da1b3a AE |
6274 | bool return_revoked = false; |
6275 | ||
6276 | /* | |
6277 | * only return revoked delegations if explicitly asked. | |
6278 | * otherwise we report revoked or bad_stateid status. | |
6279 | */ | |
6280 | if (typemask & NFS4_REVOKED_DELEG_STID) | |
6281 | return_revoked = true; | |
6282 | else if (typemask & NFS4_DELEG_STID) | |
6283 | typemask |= NFS4_REVOKED_DELEG_STID; | |
38c2f4b1 | 6284 | |
ae254dac AE |
6285 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid) || |
6286 | CLOSE_STATEID(stateid)) | |
38c2f4b1 | 6287 | return nfserr_bad_stateid; |
f71475ba | 6288 | status = set_client(&stateid->si_opaque.so_clid, cstate, nn); |
a8a7c677 | 6289 | if (status == nfserr_stale_clientid) { |
4b24ca7d | 6290 | if (cstate->session) |
a8a7c677 | 6291 | return nfserr_bad_stateid; |
38c2f4b1 | 6292 | return nfserr_stale_stateid; |
a8a7c677 | 6293 | } |
0eb6f20a BF |
6294 | if (status) |
6295 | return status; | |
4d01416a JL |
6296 | stid = find_stateid_by_type(cstate->clp, stateid, typemask); |
6297 | if (!stid) | |
38c2f4b1 | 6298 | return nfserr_bad_stateid; |
4d01416a JL |
6299 | if ((stid->sc_type == NFS4_REVOKED_DELEG_STID) && !return_revoked) { |
6300 | nfs4_put_stid(stid); | |
95da1b3a AE |
6301 | if (cstate->minorversion) |
6302 | return nfserr_deleg_revoked; | |
6303 | return nfserr_bad_stateid; | |
6304 | } | |
4d01416a | 6305 | *s = stid; |
38c2f4b1 | 6306 | return nfs_ok; |
38c2f4b1 BF |
6307 | } |
6308 | ||
eb82dd39 | 6309 | static struct nfsd_file * |
a0649b2d CH |
6310 | nfs4_find_file(struct nfs4_stid *s, int flags) |
6311 | { | |
af90f707 CH |
6312 | if (!s) |
6313 | return NULL; | |
6314 | ||
a0649b2d CH |
6315 | switch (s->sc_type) { |
6316 | case NFS4_DELEG_STID: | |
6317 | if (WARN_ON_ONCE(!s->sc_file->fi_deleg_file)) | |
6318 | return NULL; | |
eb82dd39 | 6319 | return nfsd_file_get(s->sc_file->fi_deleg_file); |
a0649b2d CH |
6320 | case NFS4_OPEN_STID: |
6321 | case NFS4_LOCK_STID: | |
6322 | if (flags & RD_STATE) | |
6323 | return find_readable_file(s->sc_file); | |
6324 | else | |
6325 | return find_writeable_file(s->sc_file); | |
a0649b2d CH |
6326 | } |
6327 | ||
6328 | return NULL; | |
6329 | } | |
6330 | ||
6331 | static __be32 | |
d8836f77 | 6332 | nfs4_check_olstateid(struct nfs4_ol_stateid *ols, int flags) |
a0649b2d CH |
6333 | { |
6334 | __be32 status; | |
6335 | ||
a0649b2d CH |
6336 | status = nfsd4_check_openowner_confirmed(ols); |
6337 | if (status) | |
6338 | return status; | |
6339 | return nfs4_check_openmode(ols, flags); | |
6340 | } | |
6341 | ||
af90f707 CH |
6342 | static __be32 |
6343 | nfs4_check_file(struct svc_rqst *rqstp, struct svc_fh *fhp, struct nfs4_stid *s, | |
5c4583b2 | 6344 | struct nfsd_file **nfp, int flags) |
af90f707 CH |
6345 | { |
6346 | int acc = (flags & RD_STATE) ? NFSD_MAY_READ : NFSD_MAY_WRITE; | |
eb82dd39 | 6347 | struct nfsd_file *nf; |
af90f707 CH |
6348 | __be32 status; |
6349 | ||
eb82dd39 JL |
6350 | nf = nfs4_find_file(s, flags); |
6351 | if (nf) { | |
af90f707 CH |
6352 | status = nfsd_permission(rqstp, fhp->fh_export, fhp->fh_dentry, |
6353 | acc | NFSD_MAY_OWNER_OVERRIDE); | |
5c4583b2 JL |
6354 | if (status) { |
6355 | nfsd_file_put(nf); | |
eb82dd39 | 6356 | goto out; |
5c4583b2 | 6357 | } |
af90f707 | 6358 | } else { |
eb82dd39 | 6359 | status = nfsd_file_acquire(rqstp, fhp, acc, &nf); |
af90f707 CH |
6360 | if (status) |
6361 | return status; | |
af90f707 | 6362 | } |
5c4583b2 | 6363 | *nfp = nf; |
eb82dd39 | 6364 | out: |
eb82dd39 | 6365 | return status; |
af90f707 | 6366 | } |
624322f1 OK |
6367 | static void |
6368 | _free_cpntf_state_locked(struct nfsd_net *nn, struct nfs4_cpntf_state *cps) | |
6369 | { | |
781fde1a CL |
6370 | WARN_ON_ONCE(cps->cp_stateid.cs_type != NFS4_COPYNOTIFY_STID); |
6371 | if (!refcount_dec_and_test(&cps->cp_stateid.cs_count)) | |
624322f1 OK |
6372 | return; |
6373 | list_del(&cps->cp_list); | |
6374 | idr_remove(&nn->s2s_cp_stateids, | |
781fde1a | 6375 | cps->cp_stateid.cs_stid.si_opaque.so_id); |
624322f1 OK |
6376 | kfree(cps); |
6377 | } | |
b7342204 OK |
6378 | /* |
6379 | * A READ from an inter server to server COPY will have a | |
6380 | * copy stateid. Look up the copy notify stateid from the | |
6381 | * idr structure and take a reference on it. | |
6382 | */ | |
ce0887ac OK |
6383 | __be32 manage_cpntf_state(struct nfsd_net *nn, stateid_t *st, |
6384 | struct nfs4_client *clp, | |
6385 | struct nfs4_cpntf_state **cps) | |
b7342204 OK |
6386 | { |
6387 | copy_stateid_t *cps_t; | |
6388 | struct nfs4_cpntf_state *state = NULL; | |
6389 | ||
6390 | if (st->si_opaque.so_clid.cl_id != nn->s2s_cp_cl_id) | |
6391 | return nfserr_bad_stateid; | |
6392 | spin_lock(&nn->s2s_cp_lock); | |
6393 | cps_t = idr_find(&nn->s2s_cp_stateids, st->si_opaque.so_id); | |
6394 | if (cps_t) { | |
6395 | state = container_of(cps_t, struct nfs4_cpntf_state, | |
6396 | cp_stateid); | |
781fde1a | 6397 | if (state->cp_stateid.cs_type != NFS4_COPYNOTIFY_STID) { |
5277a79e DC |
6398 | state = NULL; |
6399 | goto unlock; | |
6400 | } | |
ce0887ac | 6401 | if (!clp) |
781fde1a | 6402 | refcount_inc(&state->cp_stateid.cs_count); |
ce0887ac OK |
6403 | else |
6404 | _free_cpntf_state_locked(nn, state); | |
b7342204 | 6405 | } |
5277a79e | 6406 | unlock: |
b7342204 OK |
6407 | spin_unlock(&nn->s2s_cp_lock); |
6408 | if (!state) | |
6409 | return nfserr_bad_stateid; | |
ce0887ac OK |
6410 | if (!clp && state) |
6411 | *cps = state; | |
b7342204 OK |
6412 | return 0; |
6413 | } | |
6414 | ||
6415 | static __be32 find_cpntf_state(struct nfsd_net *nn, stateid_t *st, | |
6416 | struct nfs4_stid **stid) | |
6417 | { | |
6418 | __be32 status; | |
6419 | struct nfs4_cpntf_state *cps = NULL; | |
47fdb22d | 6420 | struct nfs4_client *found; |
b7342204 | 6421 | |
ce0887ac | 6422 | status = manage_cpntf_state(nn, st, NULL, &cps); |
b7342204 OK |
6423 | if (status) |
6424 | return status; | |
6425 | ||
20b7d86f | 6426 | cps->cpntf_time = ktime_get_boottime_seconds(); |
47fdb22d BF |
6427 | |
6428 | status = nfserr_expired; | |
6429 | found = lookup_clientid(&cps->cp_p_clid, true, nn); | |
6430 | if (!found) | |
b7342204 | 6431 | goto out; |
47fdb22d BF |
6432 | |
6433 | *stid = find_stateid_by_type(found, &cps->cp_p_stateid, | |
6434 | NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID); | |
6435 | if (*stid) | |
6436 | status = nfs_ok; | |
6437 | else | |
6438 | status = nfserr_bad_stateid; | |
6439 | ||
6440 | put_client_renew(found); | |
b7342204 OK |
6441 | out: |
6442 | nfs4_put_cpntf_state(nn, cps); | |
6443 | return status; | |
6444 | } | |
624322f1 OK |
6445 | |
6446 | void nfs4_put_cpntf_state(struct nfsd_net *nn, struct nfs4_cpntf_state *cps) | |
6447 | { | |
6448 | spin_lock(&nn->s2s_cp_lock); | |
6449 | _free_cpntf_state_locked(nn, cps); | |
6450 | spin_unlock(&nn->s2s_cp_lock); | |
6451 | } | |
af90f707 | 6452 | |
1da177e4 | 6453 | /* |
a0649b2d CH |
6454 | * Checks for stateid operations |
6455 | */ | |
b37ad28b | 6456 | __be32 |
af90f707 | 6457 | nfs4_preprocess_stateid_op(struct svc_rqst *rqstp, |
aa0d6aed | 6458 | struct nfsd4_compound_state *cstate, struct svc_fh *fhp, |
624322f1 OK |
6459 | stateid_t *stateid, int flags, struct nfsd_file **nfp, |
6460 | struct nfs4_stid **cstid) | |
1da177e4 | 6461 | { |
af90f707 | 6462 | struct net *net = SVC_NET(rqstp); |
3320fef1 | 6463 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
af90f707 | 6464 | struct nfs4_stid *s = NULL; |
b37ad28b | 6465 | __be32 status; |
1da177e4 | 6466 | |
5c4583b2 JL |
6467 | if (nfp) |
6468 | *nfp = NULL; | |
1da177e4 | 6469 | |
af90f707 | 6470 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { |
074b07d9 BF |
6471 | if (cstid) |
6472 | status = nfserr_bad_stateid; | |
6473 | else | |
6474 | status = check_special_stateids(net, fhp, stateid, | |
6475 | flags); | |
af90f707 CH |
6476 | goto done; |
6477 | } | |
1da177e4 | 6478 | |
2dd6e458 | 6479 | status = nfsd4_lookup_stateid(cstate, stateid, |
db24b3b4 | 6480 | NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, |
2dd6e458 | 6481 | &s, nn); |
b7342204 OK |
6482 | if (status == nfserr_bad_stateid) |
6483 | status = find_cpntf_state(nn, stateid, &s); | |
38c2f4b1 | 6484 | if (status) |
c2d1d6a8 | 6485 | return status; |
03da3169 | 6486 | status = nfsd4_stid_check_stateid_generation(stateid, s, |
a0649b2d | 6487 | nfsd4_has_session(cstate)); |
69064a27 BF |
6488 | if (status) |
6489 | goto out; | |
a0649b2d | 6490 | |
f7a4d872 BF |
6491 | switch (s->sc_type) { |
6492 | case NFS4_DELEG_STID: | |
a0649b2d | 6493 | status = nfs4_check_delegmode(delegstateid(s), flags); |
f7a4d872 BF |
6494 | break; |
6495 | case NFS4_OPEN_STID: | |
6496 | case NFS4_LOCK_STID: | |
d8836f77 | 6497 | status = nfs4_check_olstateid(openlockstateid(s), flags); |
f7a4d872 BF |
6498 | break; |
6499 | default: | |
14bcab1a | 6500 | status = nfserr_bad_stateid; |
a0649b2d CH |
6501 | break; |
6502 | } | |
8fcd461d JL |
6503 | if (status) |
6504 | goto out; | |
6505 | status = nfs4_check_fh(fhp, s); | |
a0649b2d | 6506 | |
af90f707 | 6507 | done: |
5c4583b2 JL |
6508 | if (status == nfs_ok && nfp) |
6509 | status = nfs4_check_file(rqstp, fhp, s, nfp, flags); | |
1da177e4 | 6510 | out: |
624322f1 OK |
6511 | if (s) { |
6512 | if (!status && cstid) | |
6513 | *cstid = s; | |
6514 | else | |
6515 | nfs4_put_stid(s); | |
6516 | } | |
1da177e4 LT |
6517 | return status; |
6518 | } | |
6519 | ||
17456804 BS |
6520 | /* |
6521 | * Test if the stateid is valid | |
6522 | */ | |
6523 | __be32 | |
6524 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
eb69853d | 6525 | union nfsd4_op_u *u) |
17456804 | 6526 | { |
eb69853d | 6527 | struct nfsd4_test_stateid *test_stateid = &u->test_stateid; |
03cfb420 | 6528 | struct nfsd4_test_stateid_id *stateid; |
ec59659b | 6529 | struct nfs4_client *cl = cstate->clp; |
03cfb420 | 6530 | |
03cfb420 | 6531 | list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) |
7df302f7 CL |
6532 | stateid->ts_id_status = |
6533 | nfsd4_validate_stateid(cl, &stateid->ts_id_stateid); | |
03cfb420 | 6534 | |
17456804 BS |
6535 | return nfs_ok; |
6536 | } | |
6537 | ||
42691398 CL |
6538 | static __be32 |
6539 | nfsd4_free_lock_stateid(stateid_t *stateid, struct nfs4_stid *s) | |
6540 | { | |
6541 | struct nfs4_ol_stateid *stp = openlockstateid(s); | |
6542 | __be32 ret; | |
6543 | ||
659aefb6 TM |
6544 | ret = nfsd4_lock_ol_stateid(stp); |
6545 | if (ret) | |
6546 | goto out_put_stid; | |
42691398 CL |
6547 | |
6548 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); | |
6549 | if (ret) | |
6550 | goto out; | |
6551 | ||
6552 | ret = nfserr_locks_held; | |
6553 | if (check_for_locks(stp->st_stid.sc_file, | |
6554 | lockowner(stp->st_stateowner))) | |
6555 | goto out; | |
6556 | ||
6557 | release_lock_stateid(stp); | |
6558 | ret = nfs_ok; | |
6559 | ||
6560 | out: | |
6561 | mutex_unlock(&stp->st_mutex); | |
659aefb6 | 6562 | out_put_stid: |
42691398 CL |
6563 | nfs4_put_stid(s); |
6564 | return ret; | |
6565 | } | |
6566 | ||
e1ca12df BS |
6567 | __be32 |
6568 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
eb69853d | 6569 | union nfsd4_op_u *u) |
e1ca12df | 6570 | { |
eb69853d | 6571 | struct nfsd4_free_stateid *free_stateid = &u->free_stateid; |
e1ca12df | 6572 | stateid_t *stateid = &free_stateid->fr_stateid; |
2da1cec7 | 6573 | struct nfs4_stid *s; |
3bd64a5b | 6574 | struct nfs4_delegation *dp; |
ec59659b | 6575 | struct nfs4_client *cl = cstate->clp; |
2da1cec7 | 6576 | __be32 ret = nfserr_bad_stateid; |
e1ca12df | 6577 | |
1af71cc8 JL |
6578 | spin_lock(&cl->cl_lock); |
6579 | s = find_stateid_locked(cl, stateid); | |
2da1cec7 | 6580 | if (!s) |
1af71cc8 | 6581 | goto out_unlock; |
03da3169 | 6582 | spin_lock(&s->sc_lock); |
2da1cec7 BF |
6583 | switch (s->sc_type) { |
6584 | case NFS4_DELEG_STID: | |
e1ca12df | 6585 | ret = nfserr_locks_held; |
1af71cc8 | 6586 | break; |
2da1cec7 | 6587 | case NFS4_OPEN_STID: |
2da1cec7 BF |
6588 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); |
6589 | if (ret) | |
1af71cc8 JL |
6590 | break; |
6591 | ret = nfserr_locks_held; | |
f7a4d872 | 6592 | break; |
1af71cc8 | 6593 | case NFS4_LOCK_STID: |
03da3169 | 6594 | spin_unlock(&s->sc_lock); |
a15dfcd5 | 6595 | refcount_inc(&s->sc_count); |
1af71cc8 | 6596 | spin_unlock(&cl->cl_lock); |
42691398 | 6597 | ret = nfsd4_free_lock_stateid(stateid, s); |
1af71cc8 | 6598 | goto out; |
3bd64a5b | 6599 | case NFS4_REVOKED_DELEG_STID: |
03da3169 | 6600 | spin_unlock(&s->sc_lock); |
3bd64a5b | 6601 | dp = delegstateid(s); |
2d4a532d JL |
6602 | list_del_init(&dp->dl_recall_lru); |
6603 | spin_unlock(&cl->cl_lock); | |
6011695d | 6604 | nfs4_put_stid(s); |
3bd64a5b | 6605 | ret = nfs_ok; |
1af71cc8 JL |
6606 | goto out; |
6607 | /* Default falls through and returns nfserr_bad_stateid */ | |
e1ca12df | 6608 | } |
03da3169 | 6609 | spin_unlock(&s->sc_lock); |
1af71cc8 JL |
6610 | out_unlock: |
6611 | spin_unlock(&cl->cl_lock); | |
e1ca12df | 6612 | out: |
e1ca12df BS |
6613 | return ret; |
6614 | } | |
6615 | ||
4c4cd222 N |
6616 | static inline int |
6617 | setlkflg (int type) | |
6618 | { | |
6619 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
6620 | RD_STATE : WR_STATE; | |
6621 | } | |
1da177e4 | 6622 | |
dcef0413 | 6623 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
c0a5d93e BF |
6624 | { |
6625 | struct svc_fh *current_fh = &cstate->current_fh; | |
6626 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
6627 | __be32 status; | |
6628 | ||
c0a5d93e BF |
6629 | status = nfsd4_check_seqid(cstate, sop, seqid); |
6630 | if (status) | |
6631 | return status; | |
9271d7e5 TM |
6632 | status = nfsd4_lock_ol_stateid(stp); |
6633 | if (status != nfs_ok) | |
6634 | return status; | |
f7a4d872 | 6635 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); |
35a92fe8 JL |
6636 | if (status == nfs_ok) |
6637 | status = nfs4_check_fh(current_fh, &stp->st_stid); | |
6638 | if (status != nfs_ok) | |
feb9dad5 | 6639 | mutex_unlock(&stp->st_mutex); |
35a92fe8 | 6640 | return status; |
c0a5d93e BF |
6641 | } |
6642 | ||
1da177e4 LT |
6643 | /* |
6644 | * Checks for sequence id mutating operations. | |
6645 | */ | |
b37ad28b | 6646 | static __be32 |
dd453dfd | 6647 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2288d0e3 | 6648 | stateid_t *stateid, char typemask, |
3320fef1 SK |
6649 | struct nfs4_ol_stateid **stpp, |
6650 | struct nfsd_net *nn) | |
1da177e4 | 6651 | { |
0836f587 | 6652 | __be32 status; |
38c2f4b1 | 6653 | struct nfs4_stid *s; |
e17f99b7 | 6654 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 6655 | |
dd5e3fbc | 6656 | trace_nfsd_preprocess(seqid, stateid); |
3a4f98bb | 6657 | |
1da177e4 | 6658 | *stpp = NULL; |
2dd6e458 | 6659 | status = nfsd4_lookup_stateid(cstate, stateid, typemask, &s, nn); |
c0a5d93e BF |
6660 | if (status) |
6661 | return status; | |
e17f99b7 | 6662 | stp = openlockstateid(s); |
58fb12e6 | 6663 | nfsd4_cstate_assign_replay(cstate, stp->st_stateowner); |
1da177e4 | 6664 | |
e17f99b7 | 6665 | status = nfs4_seqid_op_checks(cstate, stateid, seqid, stp); |
fd911011 | 6666 | if (!status) |
e17f99b7 | 6667 | *stpp = stp; |
fd911011 TM |
6668 | else |
6669 | nfs4_put_stid(&stp->st_stid); | |
e17f99b7 | 6670 | return status; |
c0a5d93e | 6671 | } |
39325bd0 | 6672 | |
3320fef1 SK |
6673 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
6674 | stateid_t *stateid, struct nfs4_ol_stateid **stpp, struct nfsd_net *nn) | |
c0a5d93e BF |
6675 | { |
6676 | __be32 status; | |
6677 | struct nfs4_openowner *oo; | |
4cbfc9f7 | 6678 | struct nfs4_ol_stateid *stp; |
1da177e4 | 6679 | |
c0a5d93e | 6680 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
4cbfc9f7 | 6681 | NFS4_OPEN_STID, &stp, nn); |
7a8711c9 BF |
6682 | if (status) |
6683 | return status; | |
4cbfc9f7 TM |
6684 | oo = openowner(stp->st_stateowner); |
6685 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { | |
feb9dad5 | 6686 | mutex_unlock(&stp->st_mutex); |
4cbfc9f7 | 6687 | nfs4_put_stid(&stp->st_stid); |
3a4f98bb | 6688 | return nfserr_bad_stateid; |
4cbfc9f7 TM |
6689 | } |
6690 | *stpp = stp; | |
3a4f98bb | 6691 | return nfs_ok; |
1da177e4 LT |
6692 | } |
6693 | ||
b37ad28b | 6694 | __be32 |
ca364317 | 6695 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 6696 | union nfsd4_op_u *u) |
1da177e4 | 6697 | { |
eb69853d | 6698 | struct nfsd4_open_confirm *oc = &u->open_confirm; |
b37ad28b | 6699 | __be32 status; |
fe0750e5 | 6700 | struct nfs4_openowner *oo; |
dcef0413 | 6701 | struct nfs4_ol_stateid *stp; |
3320fef1 | 6702 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 6703 | |
a6a9f18f AV |
6704 | dprintk("NFSD: nfsd4_open_confirm on file %pd\n", |
6705 | cstate->current_fh.fh_dentry); | |
1da177e4 | 6706 | |
ca364317 | 6707 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
6708 | if (status) |
6709 | return status; | |
1da177e4 | 6710 | |
9072d5c6 | 6711 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 6712 | oc->oc_seqid, &oc->oc_req_stateid, |
3320fef1 | 6713 | NFS4_OPEN_STID, &stp, nn); |
9072d5c6 | 6714 | if (status) |
68b66e82 | 6715 | goto out; |
fe0750e5 | 6716 | oo = openowner(stp->st_stateowner); |
68b66e82 | 6717 | status = nfserr_bad_stateid; |
35a92fe8 | 6718 | if (oo->oo_flags & NFS4_OO_CONFIRMED) { |
feb9dad5 | 6719 | mutex_unlock(&stp->st_mutex); |
2585fc79 | 6720 | goto put_stateid; |
35a92fe8 | 6721 | } |
dad1c067 | 6722 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
9767feb2 | 6723 | nfs4_inc_and_copy_stateid(&oc->oc_resp_stateid, &stp->st_stid); |
feb9dad5 | 6724 | mutex_unlock(&stp->st_mutex); |
dd5e3fbc | 6725 | trace_nfsd_open_confirm(oc->oc_seqid, &stp->st_stid.sc_stateid); |
2a4317c5 | 6726 | nfsd4_client_record_create(oo->oo_owner.so_client); |
68b66e82 | 6727 | status = nfs_ok; |
2585fc79 TM |
6728 | put_stateid: |
6729 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 6730 | out: |
9411b1d4 | 6731 | nfsd4_bump_seqid(cstate, status); |
1da177e4 LT |
6732 | return status; |
6733 | } | |
6734 | ||
6409a5a6 | 6735 | static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) |
1da177e4 | 6736 | { |
82c5ff1b | 6737 | if (!test_access(access, stp)) |
6409a5a6 | 6738 | return; |
11b9164a | 6739 | nfs4_file_put_access(stp->st_stid.sc_file, access); |
82c5ff1b | 6740 | clear_access(access, stp); |
6409a5a6 | 6741 | } |
f197c271 | 6742 | |
6409a5a6 BF |
6743 | static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) |
6744 | { | |
6745 | switch (to_access) { | |
6746 | case NFS4_SHARE_ACCESS_READ: | |
6747 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); | |
6748 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
6749 | break; | |
6750 | case NFS4_SHARE_ACCESS_WRITE: | |
6751 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); | |
6752 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
6753 | break; | |
6754 | case NFS4_SHARE_ACCESS_BOTH: | |
6755 | break; | |
6756 | default: | |
063b0fb9 | 6757 | WARN_ON_ONCE(1); |
1da177e4 LT |
6758 | } |
6759 | } | |
6760 | ||
b37ad28b | 6761 | __be32 |
ca364317 | 6762 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
eb69853d | 6763 | struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) |
1da177e4 | 6764 | { |
eb69853d | 6765 | struct nfsd4_open_downgrade *od = &u->open_downgrade; |
b37ad28b | 6766 | __be32 status; |
dcef0413 | 6767 | struct nfs4_ol_stateid *stp; |
3320fef1 | 6768 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 6769 | |
a6a9f18f AV |
6770 | dprintk("NFSD: nfsd4_open_downgrade on file %pd\n", |
6771 | cstate->current_fh.fh_dentry); | |
1da177e4 | 6772 | |
c30e92df | 6773 | /* We don't yet support WANT bits: */ |
2c8bd7e0 BH |
6774 | if (od->od_deleg_want) |
6775 | dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, | |
6776 | od->od_deleg_want); | |
1da177e4 | 6777 | |
c0a5d93e | 6778 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
3320fef1 | 6779 | &od->od_stateid, &stp, nn); |
9072d5c6 | 6780 | if (status) |
1da177e4 | 6781 | goto out; |
1da177e4 | 6782 | status = nfserr_inval; |
82c5ff1b | 6783 | if (!test_access(od->od_share_access, stp)) { |
c11c591f | 6784 | dprintk("NFSD: access not a subset of current bitmap: 0x%hhx, input access=%08x\n", |
1da177e4 | 6785 | stp->st_access_bmap, od->od_share_access); |
0667b1e9 | 6786 | goto put_stateid; |
1da177e4 | 6787 | } |
ce0fc43c | 6788 | if (!test_deny(od->od_share_deny, stp)) { |
c11c591f | 6789 | dprintk("NFSD: deny not a subset of current bitmap: 0x%hhx, input deny=%08x\n", |
1da177e4 | 6790 | stp->st_deny_bmap, od->od_share_deny); |
0667b1e9 | 6791 | goto put_stateid; |
1da177e4 | 6792 | } |
6409a5a6 | 6793 | nfs4_stateid_downgrade(stp, od->od_share_access); |
ce0fc43c | 6794 | reset_union_bmap_deny(od->od_share_deny, stp); |
9767feb2 | 6795 | nfs4_inc_and_copy_stateid(&od->od_stateid, &stp->st_stid); |
1da177e4 | 6796 | status = nfs_ok; |
0667b1e9 | 6797 | put_stateid: |
feb9dad5 | 6798 | mutex_unlock(&stp->st_mutex); |
0667b1e9 | 6799 | nfs4_put_stid(&stp->st_stid); |
1da177e4 | 6800 | out: |
9411b1d4 | 6801 | nfsd4_bump_seqid(cstate, status); |
1da177e4 LT |
6802 | return status; |
6803 | } | |
6804 | ||
f7a4d872 BF |
6805 | static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) |
6806 | { | |
acf9295b | 6807 | struct nfs4_client *clp = s->st_stid.sc_client; |
e8568739 | 6808 | bool unhashed; |
d83017f9 | 6809 | LIST_HEAD(reaplist); |
019805fe | 6810 | struct nfs4_ol_stateid *stp; |
acf9295b | 6811 | |
2c41beb0 | 6812 | spin_lock(&clp->cl_lock); |
e8568739 | 6813 | unhashed = unhash_open_stateid(s, &reaplist); |
acf9295b | 6814 | |
d83017f9 | 6815 | if (clp->cl_minorversion) { |
e8568739 JL |
6816 | if (unhashed) |
6817 | put_ol_stateid_locked(s, &reaplist); | |
d83017f9 | 6818 | spin_unlock(&clp->cl_lock); |
019805fe DN |
6819 | list_for_each_entry(stp, &reaplist, st_locks) |
6820 | nfs4_free_cpntf_statelist(clp->net, &stp->st_stid); | |
d83017f9 JL |
6821 | free_ol_stateid_reaplist(&reaplist); |
6822 | } else { | |
6823 | spin_unlock(&clp->cl_lock); | |
6824 | free_ol_stateid_reaplist(&reaplist); | |
e8568739 JL |
6825 | if (unhashed) |
6826 | move_to_close_lru(s, clp->net); | |
d83017f9 | 6827 | } |
38c387b5 BF |
6828 | } |
6829 | ||
1da177e4 LT |
6830 | /* |
6831 | * nfs4_unlock_state() called after encode | |
6832 | */ | |
b37ad28b | 6833 | __be32 |
ca364317 | 6834 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 6835 | union nfsd4_op_u *u) |
1da177e4 | 6836 | { |
eb69853d | 6837 | struct nfsd4_close *close = &u->close; |
b37ad28b | 6838 | __be32 status; |
dcef0413 | 6839 | struct nfs4_ol_stateid *stp; |
3320fef1 SK |
6840 | struct net *net = SVC_NET(rqstp); |
6841 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 | 6842 | |
a6a9f18f AV |
6843 | dprintk("NFSD: nfsd4_close on file %pd\n", |
6844 | cstate->current_fh.fh_dentry); | |
1da177e4 | 6845 | |
f7a4d872 BF |
6846 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
6847 | &close->cl_stateid, | |
6848 | NFS4_OPEN_STID|NFS4_CLOSED_STID, | |
3320fef1 | 6849 | &stp, nn); |
9411b1d4 | 6850 | nfsd4_bump_seqid(cstate, status); |
9072d5c6 | 6851 | if (status) |
1da177e4 | 6852 | goto out; |
15ca08d3 TM |
6853 | |
6854 | stp->st_stid.sc_type = NFS4_CLOSED_STID; | |
bd2decac JL |
6855 | |
6856 | /* | |
6857 | * Technically we don't _really_ have to increment or copy it, since | |
6858 | * it should just be gone after this operation and we clobber the | |
6859 | * copied value below, but we continue to do so here just to ensure | |
6860 | * that racing ops see that there was a state change. | |
6861 | */ | |
9767feb2 | 6862 | nfs4_inc_and_copy_stateid(&close->cl_stateid, &stp->st_stid); |
1da177e4 | 6863 | |
f7a4d872 | 6864 | nfsd4_close_open_stateid(stp); |
15ca08d3 | 6865 | mutex_unlock(&stp->st_mutex); |
8a0b589d | 6866 | |
bd2decac JL |
6867 | /* v4.1+ suggests that we send a special stateid in here, since the |
6868 | * clients should just ignore this anyway. Since this is not useful | |
6869 | * for v4.0 clients either, we set it to the special close_stateid | |
6870 | * universally. | |
6871 | * | |
6872 | * See RFC5661 section 18.2.4, and RFC7530 section 16.2.5 | |
6873 | */ | |
6874 | memcpy(&close->cl_stateid, &close_stateid, sizeof(close->cl_stateid)); | |
fb500a7c | 6875 | |
8a0b589d TM |
6876 | /* put reference from nfs4_preprocess_seqid_op */ |
6877 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 6878 | out: |
1da177e4 LT |
6879 | return status; |
6880 | } | |
6881 | ||
b37ad28b | 6882 | __be32 |
ca364317 | 6883 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 6884 | union nfsd4_op_u *u) |
1da177e4 | 6885 | { |
eb69853d | 6886 | struct nfsd4_delegreturn *dr = &u->delegreturn; |
203a8c8e BF |
6887 | struct nfs4_delegation *dp; |
6888 | stateid_t *stateid = &dr->dr_stateid; | |
38c2f4b1 | 6889 | struct nfs4_stid *s; |
b37ad28b | 6890 | __be32 status; |
3320fef1 | 6891 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 6892 | |
ca364317 | 6893 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e | 6894 | return status; |
1da177e4 | 6895 | |
2dd6e458 | 6896 | status = nfsd4_lookup_stateid(cstate, stateid, NFS4_DELEG_STID, &s, nn); |
38c2f4b1 | 6897 | if (status) |
203a8c8e | 6898 | goto out; |
38c2f4b1 | 6899 | dp = delegstateid(s); |
03da3169 | 6900 | status = nfsd4_stid_check_stateid_generation(stateid, &dp->dl_stid, nfsd4_has_session(cstate)); |
203a8c8e | 6901 | if (status) |
fd911011 | 6902 | goto put_stateid; |
203a8c8e | 6903 | |
c035362e | 6904 | wake_up_var(d_inode(cstate->current_fh.fh_dentry)); |
3bd64a5b | 6905 | destroy_delegation(dp); |
fd911011 TM |
6906 | put_stateid: |
6907 | nfs4_put_stid(&dp->dl_stid); | |
1da177e4 LT |
6908 | out: |
6909 | return status; | |
6910 | } | |
6911 | ||
87df4de8 BH |
6912 | /* last octet in a range */ |
6913 | static inline u64 | |
6914 | last_byte_offset(u64 start, u64 len) | |
6915 | { | |
6916 | u64 end; | |
6917 | ||
063b0fb9 | 6918 | WARN_ON_ONCE(!len); |
87df4de8 BH |
6919 | end = start + len; |
6920 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
6921 | } | |
6922 | ||
1da177e4 LT |
6923 | /* |
6924 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
6925 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
6926 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
6927 | * locking, this prevents us from being completely protocol-compliant. The | |
6928 | * real solution to this problem is to start using unsigned file offsets in | |
6929 | * the VFS, but this is a very deep change! | |
6930 | */ | |
6931 | static inline void | |
6932 | nfs4_transform_lock_offset(struct file_lock *lock) | |
6933 | { | |
6934 | if (lock->fl_start < 0) | |
6935 | lock->fl_start = OFFSET_MAX; | |
6936 | if (lock->fl_end < 0) | |
6937 | lock->fl_end = OFFSET_MAX; | |
6938 | } | |
6939 | ||
cae80b30 | 6940 | static fl_owner_t |
35aff067 | 6941 | nfsd4_lm_get_owner(fl_owner_t owner) |
aef9583b | 6942 | { |
cae80b30 JL |
6943 | struct nfs4_lockowner *lo = (struct nfs4_lockowner *)owner; |
6944 | ||
6945 | nfs4_get_stateowner(&lo->lo_owner); | |
6946 | return owner; | |
aef9583b KM |
6947 | } |
6948 | ||
cae80b30 | 6949 | static void |
35aff067 | 6950 | nfsd4_lm_put_owner(fl_owner_t owner) |
aef9583b | 6951 | { |
cae80b30 | 6952 | struct nfs4_lockowner *lo = (struct nfs4_lockowner *)owner; |
aef9583b | 6953 | |
cae80b30 | 6954 | if (lo) |
aef9583b | 6955 | nfs4_put_stateowner(&lo->lo_owner); |
aef9583b KM |
6956 | } |
6957 | ||
27431aff DN |
6958 | /* return pointer to struct nfs4_client if client is expirable */ |
6959 | static bool | |
6960 | nfsd4_lm_lock_expirable(struct file_lock *cfl) | |
6961 | { | |
6962 | struct nfs4_lockowner *lo = (struct nfs4_lockowner *)cfl->fl_owner; | |
6963 | struct nfs4_client *clp = lo->lo_owner.so_client; | |
6964 | struct nfsd_net *nn; | |
6965 | ||
6966 | if (try_to_expire_client(clp)) { | |
6967 | nn = net_generic(clp->net, nfsd_net_id); | |
6968 | mod_delayed_work(laundry_wq, &nn->laundromat_work, 0); | |
6969 | return true; | |
6970 | } | |
6971 | return false; | |
6972 | } | |
6973 | ||
6974 | /* schedule laundromat to run immediately and wait for it to complete */ | |
6975 | static void | |
6976 | nfsd4_lm_expire_lock(void) | |
6977 | { | |
6978 | flush_workqueue(laundry_wq); | |
6979 | } | |
6980 | ||
76d348fa JL |
6981 | static void |
6982 | nfsd4_lm_notify(struct file_lock *fl) | |
6983 | { | |
6984 | struct nfs4_lockowner *lo = (struct nfs4_lockowner *)fl->fl_owner; | |
6985 | struct net *net = lo->lo_owner.so_client->net; | |
6986 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
6987 | struct nfsd4_blocked_lock *nbl = container_of(fl, | |
6988 | struct nfsd4_blocked_lock, nbl_lock); | |
6989 | bool queue = false; | |
6990 | ||
7919d0a2 | 6991 | /* An empty list means that something else is going to be using it */ |
0cc11a61 | 6992 | spin_lock(&nn->blocked_locks_lock); |
76d348fa JL |
6993 | if (!list_empty(&nbl->nbl_list)) { |
6994 | list_del_init(&nbl->nbl_list); | |
7919d0a2 | 6995 | list_del_init(&nbl->nbl_lru); |
76d348fa JL |
6996 | queue = true; |
6997 | } | |
0cc11a61 | 6998 | spin_unlock(&nn->blocked_locks_lock); |
76d348fa | 6999 | |
2cde7f81 CL |
7000 | if (queue) { |
7001 | trace_nfsd_cb_notify_lock(lo, nbl); | |
76d348fa | 7002 | nfsd4_run_cb(&nbl->nbl_cb); |
2cde7f81 | 7003 | } |
76d348fa JL |
7004 | } |
7005 | ||
7b021967 | 7006 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
27431aff | 7007 | .lm_mod_owner = THIS_MODULE, |
76d348fa | 7008 | .lm_notify = nfsd4_lm_notify, |
35aff067 CL |
7009 | .lm_get_owner = nfsd4_lm_get_owner, |
7010 | .lm_put_owner = nfsd4_lm_put_owner, | |
27431aff DN |
7011 | .lm_lock_expirable = nfsd4_lm_lock_expirable, |
7012 | .lm_expire_lock = nfsd4_lm_expire_lock, | |
d5b9026a | 7013 | }; |
1da177e4 LT |
7014 | |
7015 | static inline void | |
7016 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
7017 | { | |
fe0750e5 | 7018 | struct nfs4_lockowner *lo; |
1da177e4 | 7019 | |
d5b9026a | 7020 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 | 7021 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
6f4859b8 BF |
7022 | xdr_netobj_dup(&deny->ld_owner, &lo->lo_owner.so_owner, |
7023 | GFP_KERNEL); | |
7c13f344 BF |
7024 | if (!deny->ld_owner.data) |
7025 | /* We just don't care that much */ | |
7026 | goto nevermind; | |
fe0750e5 | 7027 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; |
d5b9026a | 7028 | } else { |
7c13f344 BF |
7029 | nevermind: |
7030 | deny->ld_owner.len = 0; | |
7031 | deny->ld_owner.data = NULL; | |
d5b9026a N |
7032 | deny->ld_clientid.cl_boot = 0; |
7033 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
7034 | } |
7035 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
7036 | deny->ld_length = NFS4_MAX_UINT64; |
7037 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
7038 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
7039 | deny->ld_type = NFS4_READ_LT; | |
7040 | if (fl->fl_type != F_RDLCK) | |
7041 | deny->ld_type = NFS4_WRITE_LT; | |
7042 | } | |
7043 | ||
fe0750e5 | 7044 | static struct nfs4_lockowner * |
c8623999 | 7045 | find_lockowner_str_locked(struct nfs4_client *clp, struct xdr_netobj *owner) |
1da177e4 | 7046 | { |
d4f0489f | 7047 | unsigned int strhashval = ownerstr_hashval(owner); |
b3c32bcd | 7048 | struct nfs4_stateowner *so; |
1da177e4 | 7049 | |
0a880a28 TM |
7050 | lockdep_assert_held(&clp->cl_lock); |
7051 | ||
d4f0489f TM |
7052 | list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[strhashval], |
7053 | so_strhash) { | |
b3c32bcd TM |
7054 | if (so->so_is_open_owner) |
7055 | continue; | |
b5971afa KM |
7056 | if (same_owner_str(so, owner)) |
7057 | return lockowner(nfs4_get_stateowner(so)); | |
1da177e4 LT |
7058 | } |
7059 | return NULL; | |
7060 | } | |
7061 | ||
c58c6610 | 7062 | static struct nfs4_lockowner * |
c8623999 | 7063 | find_lockowner_str(struct nfs4_client *clp, struct xdr_netobj *owner) |
c58c6610 TM |
7064 | { |
7065 | struct nfs4_lockowner *lo; | |
7066 | ||
d4f0489f | 7067 | spin_lock(&clp->cl_lock); |
c8623999 | 7068 | lo = find_lockowner_str_locked(clp, owner); |
d4f0489f | 7069 | spin_unlock(&clp->cl_lock); |
c58c6610 TM |
7070 | return lo; |
7071 | } | |
7072 | ||
8f4b54c5 JL |
7073 | static void nfs4_unhash_lockowner(struct nfs4_stateowner *sop) |
7074 | { | |
c58c6610 | 7075 | unhash_lockowner_locked(lockowner(sop)); |
8f4b54c5 JL |
7076 | } |
7077 | ||
6b180f0b JL |
7078 | static void nfs4_free_lockowner(struct nfs4_stateowner *sop) |
7079 | { | |
7080 | struct nfs4_lockowner *lo = lockowner(sop); | |
7081 | ||
7082 | kmem_cache_free(lockowner_slab, lo); | |
7083 | } | |
7084 | ||
7085 | static const struct nfs4_stateowner_operations lockowner_ops = { | |
8f4b54c5 JL |
7086 | .so_unhash = nfs4_unhash_lockowner, |
7087 | .so_free = nfs4_free_lockowner, | |
6b180f0b JL |
7088 | }; |
7089 | ||
1da177e4 LT |
7090 | /* |
7091 | * Alloc a lock owner structure. | |
7092 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 7093 | * occurred. |
1da177e4 | 7094 | * |
16bfdaaf | 7095 | * strhashval = ownerstr_hashval |
1da177e4 | 7096 | */ |
fe0750e5 | 7097 | static struct nfs4_lockowner * |
c58c6610 TM |
7098 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, |
7099 | struct nfs4_ol_stateid *open_stp, | |
7100 | struct nfsd4_lock *lock) | |
7101 | { | |
c58c6610 | 7102 | struct nfs4_lockowner *lo, *ret; |
1da177e4 | 7103 | |
fe0750e5 BF |
7104 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
7105 | if (!lo) | |
1da177e4 | 7106 | return NULL; |
76d348fa | 7107 | INIT_LIST_HEAD(&lo->lo_blocked); |
fe0750e5 BF |
7108 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
7109 | lo->lo_owner.so_is_open_owner = 0; | |
5db1c03f | 7110 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid; |
6b180f0b | 7111 | lo->lo_owner.so_ops = &lockowner_ops; |
d4f0489f | 7112 | spin_lock(&clp->cl_lock); |
c8623999 | 7113 | ret = find_lockowner_str_locked(clp, &lock->lk_new_owner); |
c58c6610 TM |
7114 | if (ret == NULL) { |
7115 | list_add(&lo->lo_owner.so_strhash, | |
d4f0489f | 7116 | &clp->cl_ownerstr_hashtbl[strhashval]); |
c58c6610 TM |
7117 | ret = lo; |
7118 | } else | |
d50ffded KM |
7119 | nfs4_free_stateowner(&lo->lo_owner); |
7120 | ||
d4f0489f | 7121 | spin_unlock(&clp->cl_lock); |
340f0ba1 | 7122 | return ret; |
1da177e4 LT |
7123 | } |
7124 | ||
fd1fd685 | 7125 | static struct nfs4_ol_stateid * |
a451b123 TM |
7126 | find_lock_stateid(const struct nfs4_lockowner *lo, |
7127 | const struct nfs4_ol_stateid *ost) | |
fd1fd685 TM |
7128 | { |
7129 | struct nfs4_ol_stateid *lst; | |
fd1fd685 | 7130 | |
a451b123 | 7131 | lockdep_assert_held(&ost->st_stid.sc_client->cl_lock); |
fd1fd685 | 7132 | |
a451b123 TM |
7133 | /* If ost is not hashed, ost->st_locks will not be valid */ |
7134 | if (!nfs4_ol_stateid_unhashed(ost)) | |
7135 | list_for_each_entry(lst, &ost->st_locks, st_locks) { | |
7136 | if (lst->st_stateowner == &lo->lo_owner) { | |
7137 | refcount_inc(&lst->st_stid.sc_count); | |
7138 | return lst; | |
7139 | } | |
fd1fd685 | 7140 | } |
fd1fd685 TM |
7141 | return NULL; |
7142 | } | |
7143 | ||
beeca19c | 7144 | static struct nfs4_ol_stateid * |
356a95ec JL |
7145 | init_lock_stateid(struct nfs4_ol_stateid *stp, struct nfs4_lockowner *lo, |
7146 | struct nfs4_file *fp, struct inode *inode, | |
7147 | struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 7148 | { |
d3b313a4 | 7149 | struct nfs4_client *clp = lo->lo_owner.so_client; |
beeca19c | 7150 | struct nfs4_ol_stateid *retstp; |
1da177e4 | 7151 | |
beeca19c | 7152 | mutex_init(&stp->st_mutex); |
4f34bd05 | 7153 | mutex_lock_nested(&stp->st_mutex, OPEN_STATEID_MUTEX); |
beeca19c TM |
7154 | retry: |
7155 | spin_lock(&clp->cl_lock); | |
a451b123 TM |
7156 | if (nfs4_ol_stateid_unhashed(open_stp)) |
7157 | goto out_close; | |
7158 | retstp = find_lock_stateid(lo, open_stp); | |
beeca19c | 7159 | if (retstp) |
a451b123 | 7160 | goto out_found; |
a15dfcd5 | 7161 | refcount_inc(&stp->st_stid.sc_count); |
3abdb607 | 7162 | stp->st_stid.sc_type = NFS4_LOCK_STID; |
b5971afa | 7163 | stp->st_stateowner = nfs4_get_stateowner(&lo->lo_owner); |
13cd2184 | 7164 | get_nfs4_file(fp); |
11b9164a | 7165 | stp->st_stid.sc_file = fp; |
0997b173 | 7166 | stp->st_access_bmap = 0; |
1da177e4 | 7167 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 7168 | stp->st_openstp = open_stp; |
a451b123 | 7169 | spin_lock(&fp->fi_lock); |
3c87b9b7 | 7170 | list_add(&stp->st_locks, &open_stp->st_locks); |
1c755dc1 | 7171 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
1d31a253 TM |
7172 | list_add(&stp->st_perfile, &fp->fi_stateids); |
7173 | spin_unlock(&fp->fi_lock); | |
beeca19c | 7174 | spin_unlock(&clp->cl_lock); |
beeca19c | 7175 | return stp; |
a451b123 TM |
7176 | out_found: |
7177 | spin_unlock(&clp->cl_lock); | |
7178 | if (nfsd4_lock_ol_stateid(retstp) != nfs_ok) { | |
7179 | nfs4_put_stid(&retstp->st_stid); | |
7180 | goto retry; | |
7181 | } | |
7182 | /* To keep mutex tracking happy */ | |
7183 | mutex_unlock(&stp->st_mutex); | |
7184 | return retstp; | |
7185 | out_close: | |
7186 | spin_unlock(&clp->cl_lock); | |
7187 | mutex_unlock(&stp->st_mutex); | |
7188 | return NULL; | |
1da177e4 LT |
7189 | } |
7190 | ||
356a95ec JL |
7191 | static struct nfs4_ol_stateid * |
7192 | find_or_create_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fi, | |
7193 | struct inode *inode, struct nfs4_ol_stateid *ost, | |
7194 | bool *new) | |
7195 | { | |
7196 | struct nfs4_stid *ns = NULL; | |
7197 | struct nfs4_ol_stateid *lst; | |
7198 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); | |
7199 | struct nfs4_client *clp = oo->oo_owner.so_client; | |
7200 | ||
beeca19c | 7201 | *new = false; |
356a95ec | 7202 | spin_lock(&clp->cl_lock); |
a451b123 | 7203 | lst = find_lock_stateid(lo, ost); |
356a95ec | 7204 | spin_unlock(&clp->cl_lock); |
beeca19c TM |
7205 | if (lst != NULL) { |
7206 | if (nfsd4_lock_ol_stateid(lst) == nfs_ok) | |
7207 | goto out; | |
7208 | nfs4_put_stid(&lst->st_stid); | |
7209 | } | |
7210 | ns = nfs4_alloc_stid(clp, stateid_slab, nfs4_free_lock_stateid); | |
7211 | if (ns == NULL) | |
7212 | return NULL; | |
7213 | ||
7214 | lst = init_lock_stateid(openlockstateid(ns), lo, fi, inode, ost); | |
7215 | if (lst == openlockstateid(ns)) | |
7216 | *new = true; | |
7217 | else | |
356a95ec | 7218 | nfs4_put_stid(ns); |
beeca19c | 7219 | out: |
356a95ec JL |
7220 | return lst; |
7221 | } | |
c53530da | 7222 | |
fd39ca9a | 7223 | static int |
1da177e4 LT |
7224 | check_lock_length(u64 offset, u64 length) |
7225 | { | |
e7969315 KM |
7226 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
7227 | (length > ~offset))); | |
1da177e4 LT |
7228 | } |
7229 | ||
dcef0413 | 7230 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 | 7231 | { |
11b9164a | 7232 | struct nfs4_file *fp = lock_stp->st_stid.sc_file; |
0997b173 | 7233 | |
7214e860 JL |
7234 | lockdep_assert_held(&fp->fi_lock); |
7235 | ||
82c5ff1b | 7236 | if (test_access(access, lock_stp)) |
0997b173 | 7237 | return; |
12659651 | 7238 | __nfs4_file_get_access(fp, access); |
82c5ff1b | 7239 | set_access(access, lock_stp); |
0997b173 BF |
7240 | } |
7241 | ||
356a95ec JL |
7242 | static __be32 |
7243 | lookup_or_create_lock_state(struct nfsd4_compound_state *cstate, | |
7244 | struct nfs4_ol_stateid *ost, | |
7245 | struct nfsd4_lock *lock, | |
dd257933 | 7246 | struct nfs4_ol_stateid **plst, bool *new) |
64a284d0 | 7247 | { |
5db1c03f | 7248 | __be32 status; |
11b9164a | 7249 | struct nfs4_file *fi = ost->st_stid.sc_file; |
64a284d0 BF |
7250 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); |
7251 | struct nfs4_client *cl = oo->oo_owner.so_client; | |
2b0143b5 | 7252 | struct inode *inode = d_inode(cstate->current_fh.fh_dentry); |
64a284d0 | 7253 | struct nfs4_lockowner *lo; |
dd257933 | 7254 | struct nfs4_ol_stateid *lst; |
64a284d0 BF |
7255 | unsigned int strhashval; |
7256 | ||
c8623999 | 7257 | lo = find_lockowner_str(cl, &lock->lk_new_owner); |
c53530da | 7258 | if (!lo) { |
76f6c9e1 | 7259 | strhashval = ownerstr_hashval(&lock->lk_new_owner); |
c53530da JL |
7260 | lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); |
7261 | if (lo == NULL) | |
7262 | return nfserr_jukebox; | |
7263 | } else { | |
7264 | /* with an existing lockowner, seqids must be the same */ | |
5db1c03f | 7265 | status = nfserr_bad_seqid; |
c53530da JL |
7266 | if (!cstate->minorversion && |
7267 | lock->lk_new_lock_seqid != lo->lo_owner.so_seqid) | |
5db1c03f | 7268 | goto out; |
64a284d0 | 7269 | } |
c53530da | 7270 | |
dd257933 JL |
7271 | lst = find_or_create_lock_stateid(lo, fi, inode, ost, new); |
7272 | if (lst == NULL) { | |
5db1c03f JL |
7273 | status = nfserr_jukebox; |
7274 | goto out; | |
64a284d0 | 7275 | } |
dd257933 | 7276 | |
5db1c03f | 7277 | status = nfs_ok; |
dd257933 | 7278 | *plst = lst; |
5db1c03f JL |
7279 | out: |
7280 | nfs4_put_stateowner(&lo->lo_owner); | |
7281 | return status; | |
64a284d0 BF |
7282 | } |
7283 | ||
1da177e4 LT |
7284 | /* |
7285 | * LOCK operation | |
7286 | */ | |
b37ad28b | 7287 | __be32 |
ca364317 | 7288 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 7289 | union nfsd4_op_u *u) |
1da177e4 | 7290 | { |
eb69853d | 7291 | struct nfsd4_lock *lock = &u->lock; |
fe0750e5 BF |
7292 | struct nfs4_openowner *open_sop = NULL; |
7293 | struct nfs4_lockowner *lock_sop = NULL; | |
3d0fabd5 | 7294 | struct nfs4_ol_stateid *lock_stp = NULL; |
0667b1e9 | 7295 | struct nfs4_ol_stateid *open_stp = NULL; |
7214e860 | 7296 | struct nfs4_file *fp; |
eb82dd39 | 7297 | struct nfsd_file *nf = NULL; |
76d348fa | 7298 | struct nfsd4_blocked_lock *nbl = NULL; |
21179d81 JL |
7299 | struct file_lock *file_lock = NULL; |
7300 | struct file_lock *conflock = NULL; | |
b37ad28b | 7301 | __be32 status = 0; |
b34f27aa | 7302 | int lkflg; |
b8dd7b9a | 7303 | int err; |
5db1c03f | 7304 | bool new = false; |
76d348fa JL |
7305 | unsigned char fl_type; |
7306 | unsigned int fl_flags = FL_POSIX; | |
3320fef1 SK |
7307 | struct net *net = SVC_NET(rqstp); |
7308 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 LT |
7309 | |
7310 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
7311 | (long long) lock->lk_offset, | |
7312 | (long long) lock->lk_length); | |
7313 | ||
1da177e4 LT |
7314 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
7315 | return nfserr_inval; | |
7316 | ||
ca364317 | 7317 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 7318 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
7319 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
7320 | return status; | |
7321 | } | |
7322 | ||
1da177e4 | 7323 | if (lock->lk_is_new) { |
684e5638 BF |
7324 | if (nfsd4_has_session(cstate)) |
7325 | /* See rfc 5661 18.10.3: given clientid is ignored: */ | |
76f6c9e1 | 7326 | memcpy(&lock->lk_new_clientid, |
ec59659b | 7327 | &cstate->clp->cl_clientid, |
684e5638 BF |
7328 | sizeof(clientid_t)); |
7329 | ||
1da177e4 | 7330 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 7331 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
7332 | lock->lk_new_open_seqid, |
7333 | &lock->lk_new_open_stateid, | |
3320fef1 | 7334 | &open_stp, nn); |
37515177 | 7335 | if (status) |
1da177e4 | 7336 | goto out; |
feb9dad5 | 7337 | mutex_unlock(&open_stp->st_mutex); |
fe0750e5 | 7338 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 7339 | status = nfserr_bad_stateid; |
684e5638 | 7340 | if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
76f6c9e1 | 7341 | &lock->lk_new_clientid)) |
b34f27aa | 7342 | goto out; |
64a284d0 | 7343 | status = lookup_or_create_lock_state(cstate, open_stp, lock, |
5db1c03f | 7344 | &lock_stp, &new); |
3d0fabd5 | 7345 | } else { |
dd453dfd | 7346 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
7347 | lock->lk_old_lock_seqid, |
7348 | &lock->lk_old_lock_stateid, | |
3320fef1 | 7349 | NFS4_LOCK_STID, &lock_stp, nn); |
3d0fabd5 | 7350 | } |
e1aaa891 BF |
7351 | if (status) |
7352 | goto out; | |
64a284d0 | 7353 | lock_sop = lockowner(lock_stp->st_stateowner); |
1da177e4 | 7354 | |
b34f27aa BF |
7355 | lkflg = setlkflg(lock->lk_type); |
7356 | status = nfs4_check_openmode(lock_stp, lkflg); | |
7357 | if (status) | |
7358 | goto out; | |
7359 | ||
0dd395dc | 7360 | status = nfserr_grace; |
3320fef1 | 7361 | if (locks_in_grace(net) && !lock->lk_reclaim) |
0dd395dc N |
7362 | goto out; |
7363 | status = nfserr_no_grace; | |
3320fef1 | 7364 | if (!locks_in_grace(net) && lock->lk_reclaim) |
0dd395dc N |
7365 | goto out; |
7366 | ||
bb0a55bb BF |
7367 | if (lock->lk_reclaim) |
7368 | fl_flags |= FL_RECLAIM; | |
7369 | ||
11b9164a | 7370 | fp = lock_stp->st_stid.sc_file; |
1da177e4 | 7371 | switch (lock->lk_type) { |
1da177e4 | 7372 | case NFS4_READW_LT: |
40595cdc | 7373 | if (nfsd4_has_session(cstate)) |
76d348fa | 7374 | fl_flags |= FL_SLEEP; |
df561f66 | 7375 | fallthrough; |
76d348fa | 7376 | case NFS4_READ_LT: |
7214e860 | 7377 | spin_lock(&fp->fi_lock); |
eb82dd39 JL |
7378 | nf = find_readable_file_locked(fp); |
7379 | if (nf) | |
0997b173 | 7380 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); |
7214e860 | 7381 | spin_unlock(&fp->fi_lock); |
76d348fa | 7382 | fl_type = F_RDLCK; |
529d7b2a | 7383 | break; |
1da177e4 | 7384 | case NFS4_WRITEW_LT: |
40595cdc | 7385 | if (nfsd4_has_session(cstate)) |
76d348fa | 7386 | fl_flags |= FL_SLEEP; |
df561f66 | 7387 | fallthrough; |
76d348fa | 7388 | case NFS4_WRITE_LT: |
7214e860 | 7389 | spin_lock(&fp->fi_lock); |
eb82dd39 JL |
7390 | nf = find_writeable_file_locked(fp); |
7391 | if (nf) | |
0997b173 | 7392 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); |
7214e860 | 7393 | spin_unlock(&fp->fi_lock); |
76d348fa | 7394 | fl_type = F_WRLCK; |
529d7b2a | 7395 | break; |
1da177e4 LT |
7396 | default: |
7397 | status = nfserr_inval; | |
7398 | goto out; | |
7399 | } | |
76d348fa | 7400 | |
eb82dd39 | 7401 | if (!nf) { |
f9d7562f BF |
7402 | status = nfserr_openmode; |
7403 | goto out; | |
7404 | } | |
aef9583b | 7405 | |
40595cdc BF |
7406 | /* |
7407 | * Most filesystems with their own ->lock operations will block | |
7408 | * the nfsd thread waiting to acquire the lock. That leads to | |
7409 | * deadlocks (we don't want every nfsd thread tied up waiting | |
7410 | * for file locks), so don't attempt blocking lock notifications | |
7411 | * on those filesystems: | |
7412 | */ | |
7413 | if (nf->nf_file->f_op->lock) | |
7414 | fl_flags &= ~FL_SLEEP; | |
7415 | ||
76d348fa JL |
7416 | nbl = find_or_allocate_block(lock_sop, &fp->fi_fhandle, nn); |
7417 | if (!nbl) { | |
7418 | dprintk("NFSD: %s: unable to allocate block!\n", __func__); | |
7419 | status = nfserr_jukebox; | |
7420 | goto out; | |
7421 | } | |
7422 | ||
7423 | file_lock = &nbl->nbl_lock; | |
7424 | file_lock->fl_type = fl_type; | |
aef9583b | 7425 | file_lock->fl_owner = (fl_owner_t)lockowner(nfs4_get_stateowner(&lock_sop->lo_owner)); |
21179d81 | 7426 | file_lock->fl_pid = current->tgid; |
eb82dd39 | 7427 | file_lock->fl_file = nf->nf_file; |
76d348fa | 7428 | file_lock->fl_flags = fl_flags; |
21179d81 JL |
7429 | file_lock->fl_lmops = &nfsd_posix_mng_ops; |
7430 | file_lock->fl_start = lock->lk_offset; | |
7431 | file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); | |
7432 | nfs4_transform_lock_offset(file_lock); | |
7433 | ||
7434 | conflock = locks_alloc_lock(); | |
7435 | if (!conflock) { | |
7436 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
7437 | status = nfserr_jukebox; | |
7438 | goto out; | |
7439 | } | |
1da177e4 | 7440 | |
76d348fa | 7441 | if (fl_flags & FL_SLEEP) { |
20b7d86f | 7442 | nbl->nbl_time = ktime_get_boottime_seconds(); |
0cc11a61 | 7443 | spin_lock(&nn->blocked_locks_lock); |
76d348fa | 7444 | list_add_tail(&nbl->nbl_list, &lock_sop->lo_blocked); |
7919d0a2 | 7445 | list_add_tail(&nbl->nbl_lru, &nn->blocked_locks_lru); |
47446d74 | 7446 | kref_get(&nbl->nbl_kref); |
0cc11a61 | 7447 | spin_unlock(&nn->blocked_locks_lock); |
76d348fa JL |
7448 | } |
7449 | ||
eb82dd39 | 7450 | err = vfs_lock_file(nf->nf_file, F_SETLK, file_lock, conflock); |
76d348fa | 7451 | switch (err) { |
1da177e4 | 7452 | case 0: /* success! */ |
9767feb2 | 7453 | nfs4_inc_and_copy_stateid(&lock->lk_resp_stateid, &lock_stp->st_stid); |
b8dd7b9a | 7454 | status = 0; |
03f318ca BF |
7455 | if (lock->lk_reclaim) |
7456 | nn->somebody_reclaimed = true; | |
eb76b3fd | 7457 | break; |
76d348fa | 7458 | case FILE_LOCK_DEFERRED: |
47446d74 | 7459 | kref_put(&nbl->nbl_kref, free_nbl); |
76d348fa | 7460 | nbl = NULL; |
df561f66 | 7461 | fallthrough; |
76d348fa | 7462 | case -EAGAIN: /* conflock holds conflicting lock */ |
eb76b3fd AA |
7463 | status = nfserr_denied; |
7464 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
21179d81 | 7465 | nfs4_set_lock_denied(conflock, &lock->lk_denied); |
eb76b3fd | 7466 | break; |
76d348fa | 7467 | case -EDEADLK: |
1da177e4 | 7468 | status = nfserr_deadlock; |
eb76b3fd | 7469 | break; |
3e772463 | 7470 | default: |
fd85b817 | 7471 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 7472 | status = nfserrno(err); |
eb76b3fd | 7473 | break; |
1da177e4 | 7474 | } |
1da177e4 | 7475 | out: |
76d348fa JL |
7476 | if (nbl) { |
7477 | /* dequeue it if we queued it before */ | |
7478 | if (fl_flags & FL_SLEEP) { | |
0cc11a61 | 7479 | spin_lock(&nn->blocked_locks_lock); |
47446d74 VA |
7480 | if (!list_empty(&nbl->nbl_list) && |
7481 | !list_empty(&nbl->nbl_lru)) { | |
7482 | list_del_init(&nbl->nbl_list); | |
7483 | list_del_init(&nbl->nbl_lru); | |
7484 | kref_put(&nbl->nbl_kref, free_nbl); | |
7485 | } | |
7486 | /* nbl can use one of lists to be linked to reaplist */ | |
0cc11a61 | 7487 | spin_unlock(&nn->blocked_locks_lock); |
76d348fa JL |
7488 | } |
7489 | free_blocked_lock(nbl); | |
7490 | } | |
eb82dd39 JL |
7491 | if (nf) |
7492 | nfsd_file_put(nf); | |
5db1c03f JL |
7493 | if (lock_stp) { |
7494 | /* Bump seqid manually if the 4.0 replay owner is openowner */ | |
7495 | if (cstate->replay_owner && | |
7496 | cstate->replay_owner != &lock_sop->lo_owner && | |
7497 | seqid_mutating_err(ntohl(status))) | |
7498 | lock_sop->lo_owner.so_seqid++; | |
7499 | ||
7500 | /* | |
7501 | * If this is a new, never-before-used stateid, and we are | |
7502 | * returning an error, then just go ahead and release it. | |
7503 | */ | |
25020720 | 7504 | if (status && new) |
5db1c03f | 7505 | release_lock_stateid(lock_stp); |
beeca19c TM |
7506 | |
7507 | mutex_unlock(&lock_stp->st_mutex); | |
5db1c03f | 7508 | |
3d0fabd5 | 7509 | nfs4_put_stid(&lock_stp->st_stid); |
5db1c03f | 7510 | } |
0667b1e9 TM |
7511 | if (open_stp) |
7512 | nfs4_put_stid(&open_stp->st_stid); | |
9411b1d4 | 7513 | nfsd4_bump_seqid(cstate, status); |
21179d81 JL |
7514 | if (conflock) |
7515 | locks_free_lock(conflock); | |
1da177e4 LT |
7516 | return status; |
7517 | } | |
7518 | ||
55ef1274 BF |
7519 | /* |
7520 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
7521 | * so we do a temporary open here just to get an open file to pass to | |
0bcc7ca4 | 7522 | * vfs_test_lock. |
55ef1274 | 7523 | */ |
04da6e9d | 7524 | static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) |
55ef1274 | 7525 | { |
6b556ca2 | 7526 | struct nfsd_file *nf; |
bb4d53d6 | 7527 | struct inode *inode; |
217fd6f6 BF |
7528 | __be32 err; |
7529 | ||
7530 | err = nfsd_file_acquire(rqstp, fhp, NFSD_MAY_READ, &nf); | |
7531 | if (err) | |
7532 | return err; | |
bb4d53d6 N |
7533 | inode = fhp->fh_dentry->d_inode; |
7534 | inode_lock(inode); /* to block new leases till after test_lock: */ | |
7535 | err = nfserrno(nfsd_open_break_lease(inode, NFSD_MAY_READ)); | |
217fd6f6 BF |
7536 | if (err) |
7537 | goto out; | |
0bcc7ca4 | 7538 | lock->fl_file = nf->nf_file; |
217fd6f6 | 7539 | err = nfserrno(vfs_test_lock(nf->nf_file, lock)); |
0bcc7ca4 | 7540 | lock->fl_file = NULL; |
217fd6f6 | 7541 | out: |
bb4d53d6 | 7542 | inode_unlock(inode); |
217fd6f6 | 7543 | nfsd_file_put(nf); |
55ef1274 BF |
7544 | return err; |
7545 | } | |
7546 | ||
1da177e4 LT |
7547 | /* |
7548 | * LOCKT operation | |
7549 | */ | |
b37ad28b | 7550 | __be32 |
ca364317 | 7551 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 7552 | union nfsd4_op_u *u) |
1da177e4 | 7553 | { |
eb69853d | 7554 | struct nfsd4_lockt *lockt = &u->lockt; |
21179d81 | 7555 | struct file_lock *file_lock = NULL; |
5db1c03f | 7556 | struct nfs4_lockowner *lo = NULL; |
b37ad28b | 7557 | __be32 status; |
7f2210fa | 7558 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 7559 | |
5ccb0066 | 7560 | if (locks_in_grace(SVC_NET(rqstp))) |
1da177e4 LT |
7561 | return nfserr_grace; |
7562 | ||
7563 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
7564 | return nfserr_inval; | |
7565 | ||
9b2ef62b | 7566 | if (!nfsd4_has_session(cstate)) { |
f71475ba | 7567 | status = set_client(&lockt->lt_clientid, cstate, nn); |
9b2ef62b BF |
7568 | if (status) |
7569 | goto out; | |
7570 | } | |
1da177e4 | 7571 | |
75c096f7 | 7572 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 7573 | goto out; |
1da177e4 | 7574 | |
21179d81 JL |
7575 | file_lock = locks_alloc_lock(); |
7576 | if (!file_lock) { | |
7577 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
7578 | status = nfserr_jukebox; | |
7579 | goto out; | |
7580 | } | |
6cd90662 | 7581 | |
1da177e4 LT |
7582 | switch (lockt->lt_type) { |
7583 | case NFS4_READ_LT: | |
7584 | case NFS4_READW_LT: | |
21179d81 | 7585 | file_lock->fl_type = F_RDLCK; |
f50c9d79 | 7586 | break; |
1da177e4 LT |
7587 | case NFS4_WRITE_LT: |
7588 | case NFS4_WRITEW_LT: | |
21179d81 | 7589 | file_lock->fl_type = F_WRLCK; |
f50c9d79 | 7590 | break; |
1da177e4 | 7591 | default: |
2fdada03 | 7592 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 | 7593 | status = nfserr_inval; |
f50c9d79 | 7594 | goto out; |
1da177e4 LT |
7595 | } |
7596 | ||
c8623999 | 7597 | lo = find_lockowner_str(cstate->clp, &lockt->lt_owner); |
fe0750e5 | 7598 | if (lo) |
21179d81 JL |
7599 | file_lock->fl_owner = (fl_owner_t)lo; |
7600 | file_lock->fl_pid = current->tgid; | |
7601 | file_lock->fl_flags = FL_POSIX; | |
1da177e4 | 7602 | |
21179d81 JL |
7603 | file_lock->fl_start = lockt->lt_offset; |
7604 | file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); | |
1da177e4 | 7605 | |
21179d81 | 7606 | nfs4_transform_lock_offset(file_lock); |
1da177e4 | 7607 | |
21179d81 | 7608 | status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock); |
04da6e9d | 7609 | if (status) |
fd85b817 | 7610 | goto out; |
04da6e9d | 7611 | |
21179d81 | 7612 | if (file_lock->fl_type != F_UNLCK) { |
1da177e4 | 7613 | status = nfserr_denied; |
21179d81 | 7614 | nfs4_set_lock_denied(file_lock, &lockt->lt_denied); |
1da177e4 LT |
7615 | } |
7616 | out: | |
5db1c03f JL |
7617 | if (lo) |
7618 | nfs4_put_stateowner(&lo->lo_owner); | |
21179d81 JL |
7619 | if (file_lock) |
7620 | locks_free_lock(file_lock); | |
1da177e4 LT |
7621 | return status; |
7622 | } | |
7623 | ||
b37ad28b | 7624 | __be32 |
ca364317 | 7625 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 7626 | union nfsd4_op_u *u) |
1da177e4 | 7627 | { |
eb69853d | 7628 | struct nfsd4_locku *locku = &u->locku; |
dcef0413 | 7629 | struct nfs4_ol_stateid *stp; |
eb82dd39 | 7630 | struct nfsd_file *nf = NULL; |
21179d81 | 7631 | struct file_lock *file_lock = NULL; |
b37ad28b | 7632 | __be32 status; |
b8dd7b9a | 7633 | int err; |
3320fef1 SK |
7634 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
7635 | ||
1da177e4 LT |
7636 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", |
7637 | (long long) locku->lu_offset, | |
7638 | (long long) locku->lu_length); | |
7639 | ||
7640 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
7641 | return nfserr_inval; | |
7642 | ||
9072d5c6 | 7643 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
3320fef1 SK |
7644 | &locku->lu_stateid, NFS4_LOCK_STID, |
7645 | &stp, nn); | |
9072d5c6 | 7646 | if (status) |
1da177e4 | 7647 | goto out; |
eb82dd39 JL |
7648 | nf = find_any_file(stp->st_stid.sc_file); |
7649 | if (!nf) { | |
f9d7562f | 7650 | status = nfserr_lock_range; |
858cc573 | 7651 | goto put_stateid; |
f9d7562f | 7652 | } |
21179d81 JL |
7653 | file_lock = locks_alloc_lock(); |
7654 | if (!file_lock) { | |
7655 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
7656 | status = nfserr_jukebox; | |
eb82dd39 | 7657 | goto put_file; |
21179d81 | 7658 | } |
6cd90662 | 7659 | |
21179d81 | 7660 | file_lock->fl_type = F_UNLCK; |
aef9583b | 7661 | file_lock->fl_owner = (fl_owner_t)lockowner(nfs4_get_stateowner(stp->st_stateowner)); |
21179d81 | 7662 | file_lock->fl_pid = current->tgid; |
eb82dd39 | 7663 | file_lock->fl_file = nf->nf_file; |
21179d81 JL |
7664 | file_lock->fl_flags = FL_POSIX; |
7665 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
7666 | file_lock->fl_start = locku->lu_offset; | |
7667 | ||
7668 | file_lock->fl_end = last_byte_offset(locku->lu_offset, | |
7669 | locku->lu_length); | |
7670 | nfs4_transform_lock_offset(file_lock); | |
1da177e4 | 7671 | |
eb82dd39 | 7672 | err = vfs_lock_file(nf->nf_file, F_SETLK, file_lock, NULL); |
b8dd7b9a | 7673 | if (err) { |
fd85b817 | 7674 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
7675 | goto out_nfserr; |
7676 | } | |
9767feb2 | 7677 | nfs4_inc_and_copy_stateid(&locku->lu_stateid, &stp->st_stid); |
eb82dd39 JL |
7678 | put_file: |
7679 | nfsd_file_put(nf); | |
858cc573 | 7680 | put_stateid: |
feb9dad5 | 7681 | mutex_unlock(&stp->st_mutex); |
858cc573 | 7682 | nfs4_put_stid(&stp->st_stid); |
1da177e4 | 7683 | out: |
9411b1d4 | 7684 | nfsd4_bump_seqid(cstate, status); |
21179d81 JL |
7685 | if (file_lock) |
7686 | locks_free_lock(file_lock); | |
1da177e4 LT |
7687 | return status; |
7688 | ||
7689 | out_nfserr: | |
b8dd7b9a | 7690 | status = nfserrno(err); |
eb82dd39 | 7691 | goto put_file; |
1da177e4 LT |
7692 | } |
7693 | ||
7694 | /* | |
7695 | * returns | |
f9c00c3a JL |
7696 | * true: locks held by lockowner |
7697 | * false: no locks held by lockowner | |
1da177e4 | 7698 | */ |
f9c00c3a JL |
7699 | static bool |
7700 | check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner) | |
1da177e4 | 7701 | { |
bd61e0a9 | 7702 | struct file_lock *fl; |
f9c00c3a | 7703 | int status = false; |
eb82dd39 | 7704 | struct nfsd_file *nf = find_any_file(fp); |
f9c00c3a | 7705 | struct inode *inode; |
bd61e0a9 | 7706 | struct file_lock_context *flctx; |
f9c00c3a | 7707 | |
eb82dd39 | 7708 | if (!nf) { |
f9c00c3a JL |
7709 | /* Any valid lock stateid should have some sort of access */ |
7710 | WARN_ON_ONCE(1); | |
7711 | return status; | |
7712 | } | |
7713 | ||
eb82dd39 | 7714 | inode = locks_inode(nf->nf_file); |
bd61e0a9 JL |
7715 | flctx = inode->i_flctx; |
7716 | ||
7717 | if (flctx && !list_empty_careful(&flctx->flc_posix)) { | |
6109c850 | 7718 | spin_lock(&flctx->flc_lock); |
bd61e0a9 JL |
7719 | list_for_each_entry(fl, &flctx->flc_posix, fl_list) { |
7720 | if (fl->fl_owner == (fl_owner_t)lowner) { | |
7721 | status = true; | |
7722 | break; | |
7723 | } | |
796dadfd | 7724 | } |
6109c850 | 7725 | spin_unlock(&flctx->flc_lock); |
1da177e4 | 7726 | } |
eb82dd39 | 7727 | nfsd_file_put(nf); |
1da177e4 LT |
7728 | return status; |
7729 | } | |
7730 | ||
043862b0 CL |
7731 | /** |
7732 | * nfsd4_release_lockowner - process NFSv4.0 RELEASE_LOCKOWNER operations | |
7733 | * @rqstp: RPC transaction | |
7734 | * @cstate: NFSv4 COMPOUND state | |
7735 | * @u: RELEASE_LOCKOWNER arguments | |
7736 | * | |
7737 | * The lockowner's so_count is bumped when a lock record is added | |
7738 | * or when copying a conflicting lock. The latter case is brief, | |
7739 | * but can lead to fleeting false positives when looking for | |
7740 | * locks-in-use. | |
7741 | * | |
7742 | * Return values: | |
7743 | * %nfs_ok: lockowner released or not found | |
7744 | * %nfserr_locks_held: lockowner still in use | |
7745 | * %nfserr_stale_clientid: clientid no longer active | |
7746 | * %nfserr_expired: clientid not recognized | |
7747 | */ | |
b37ad28b | 7748 | __be32 |
b591480b BF |
7749 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
7750 | struct nfsd4_compound_state *cstate, | |
eb69853d | 7751 | union nfsd4_op_u *u) |
1da177e4 | 7752 | { |
eb69853d | 7753 | struct nfsd4_release_lockowner *rlockowner = &u->release_lockowner; |
bd8fdb6e | 7754 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 7755 | clientid_t *clid = &rlockowner->rl_clientid; |
dcef0413 | 7756 | struct nfs4_ol_stateid *stp; |
bd8fdb6e | 7757 | struct nfs4_lockowner *lo; |
c58c6610 | 7758 | struct nfs4_client *clp; |
bd8fdb6e CL |
7759 | LIST_HEAD(reaplist); |
7760 | __be32 status; | |
1da177e4 LT |
7761 | |
7762 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
7763 | clid->cl_boot, clid->cl_id); | |
7764 | ||
f71475ba | 7765 | status = set_client(clid, cstate, nn); |
9b2ef62b | 7766 | if (status) |
51f5e783 | 7767 | return status; |
d4f0489f | 7768 | clp = cstate->clp; |
fd44907c | 7769 | |
bd8fdb6e CL |
7770 | spin_lock(&clp->cl_lock); |
7771 | lo = find_lockowner_str_locked(clp, &rlockowner->rl_owner); | |
88584818 CL |
7772 | if (!lo) { |
7773 | spin_unlock(&clp->cl_lock); | |
043862b0 | 7774 | return nfs_ok; |
88584818 | 7775 | } |
bd8fdb6e CL |
7776 | if (atomic_read(&lo->lo_owner.so_count) != 2) { |
7777 | spin_unlock(&clp->cl_lock); | |
7778 | nfs4_put_stateowner(&lo->lo_owner); | |
7779 | return nfserr_locks_held; | |
7780 | } | |
88584818 CL |
7781 | unhash_lockowner_locked(lo); |
7782 | while (!list_empty(&lo->lo_owner.so_stateids)) { | |
7783 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
7784 | struct nfs4_ol_stateid, | |
7785 | st_perstateowner); | |
7786 | WARN_ON(!unhash_lock_stateid(stp)); | |
7787 | put_ol_stateid_locked(stp, &reaplist); | |
7788 | } | |
c58c6610 | 7789 | spin_unlock(&clp->cl_lock); |
043862b0 | 7790 | |
88584818 | 7791 | free_ol_stateid_reaplist(&reaplist); |
68ef3bc3 | 7792 | remove_blocked_locks(lo); |
88584818 | 7793 | nfs4_put_stateowner(&lo->lo_owner); |
043862b0 | 7794 | return nfs_ok; |
1da177e4 LT |
7795 | } |
7796 | ||
7797 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 7798 | alloc_reclaim(void) |
1da177e4 | 7799 | { |
a55370a3 | 7800 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
7801 | } |
7802 | ||
0ce0c2b5 | 7803 | bool |
6b189105 | 7804 | nfs4_has_reclaimed_state(struct xdr_netobj name, struct nfsd_net *nn) |
c7b9a459 | 7805 | { |
0ce0c2b5 | 7806 | struct nfs4_client_reclaim *crp; |
c7b9a459 | 7807 | |
52e19c09 | 7808 | crp = nfsd4_find_reclaim_client(name, nn); |
0ce0c2b5 | 7809 | return (crp && crp->cr_clp); |
c7b9a459 N |
7810 | } |
7811 | ||
1da177e4 LT |
7812 | /* |
7813 | * failure => all reset bets are off, nfserr_no_grace... | |
6b189105 SM |
7814 | * |
7815 | * The caller is responsible for freeing name.data if NULL is returned (it | |
7816 | * will be freed in nfs4_remove_reclaim_record in the normal case). | |
1da177e4 | 7817 | */ |
772a9bbb | 7818 | struct nfs4_client_reclaim * |
6ee95d1c SM |
7819 | nfs4_client_to_reclaim(struct xdr_netobj name, struct xdr_netobj princhash, |
7820 | struct nfsd_net *nn) | |
1da177e4 LT |
7821 | { |
7822 | unsigned int strhashval; | |
772a9bbb | 7823 | struct nfs4_client_reclaim *crp; |
1da177e4 | 7824 | |
a55370a3 | 7825 | crp = alloc_reclaim(); |
772a9bbb JL |
7826 | if (crp) { |
7827 | strhashval = clientstr_hashval(name); | |
7828 | INIT_LIST_HEAD(&crp->cr_strhash); | |
52e19c09 | 7829 | list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]); |
6b189105 SM |
7830 | crp->cr_name.data = name.data; |
7831 | crp->cr_name.len = name.len; | |
6ee95d1c SM |
7832 | crp->cr_princhash.data = princhash.data; |
7833 | crp->cr_princhash.len = princhash.len; | |
0ce0c2b5 | 7834 | crp->cr_clp = NULL; |
52e19c09 | 7835 | nn->reclaim_str_hashtbl_size++; |
772a9bbb JL |
7836 | } |
7837 | return crp; | |
1da177e4 LT |
7838 | } |
7839 | ||
ce30e539 | 7840 | void |
52e19c09 | 7841 | nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn) |
ce30e539 JL |
7842 | { |
7843 | list_del(&crp->cr_strhash); | |
6b189105 | 7844 | kfree(crp->cr_name.data); |
6ee95d1c | 7845 | kfree(crp->cr_princhash.data); |
ce30e539 | 7846 | kfree(crp); |
52e19c09 | 7847 | nn->reclaim_str_hashtbl_size--; |
ce30e539 JL |
7848 | } |
7849 | ||
2a4317c5 | 7850 | void |
52e19c09 | 7851 | nfs4_release_reclaim(struct nfsd_net *nn) |
1da177e4 LT |
7852 | { |
7853 | struct nfs4_client_reclaim *crp = NULL; | |
7854 | int i; | |
7855 | ||
1da177e4 | 7856 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
52e19c09 SK |
7857 | while (!list_empty(&nn->reclaim_str_hashtbl[i])) { |
7858 | crp = list_entry(nn->reclaim_str_hashtbl[i].next, | |
1da177e4 | 7859 | struct nfs4_client_reclaim, cr_strhash); |
52e19c09 | 7860 | nfs4_remove_reclaim_record(crp, nn); |
1da177e4 LT |
7861 | } |
7862 | } | |
063b0fb9 | 7863 | WARN_ON_ONCE(nn->reclaim_str_hashtbl_size); |
1da177e4 LT |
7864 | } |
7865 | ||
7866 | /* | |
7867 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
2a4317c5 | 7868 | struct nfs4_client_reclaim * |
6b189105 | 7869 | nfsd4_find_reclaim_client(struct xdr_netobj name, struct nfsd_net *nn) |
1da177e4 LT |
7870 | { |
7871 | unsigned int strhashval; | |
1da177e4 LT |
7872 | struct nfs4_client_reclaim *crp = NULL; |
7873 | ||
6b189105 | 7874 | strhashval = clientstr_hashval(name); |
52e19c09 | 7875 | list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) { |
6b189105 | 7876 | if (compare_blob(&crp->cr_name, &name) == 0) { |
1da177e4 LT |
7877 | return crp; |
7878 | } | |
7879 | } | |
7880 | return NULL; | |
7881 | } | |
7882 | ||
b37ad28b | 7883 | __be32 |
1722b046 | 7884 | nfs4_check_open_reclaim(struct nfs4_client *clp) |
1da177e4 | 7885 | { |
1722b046 | 7886 | if (test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, &clp->cl_flags)) |
3b3e7b72 JL |
7887 | return nfserr_no_grace; |
7888 | ||
1722b046 | 7889 | if (nfsd4_client_record_check(clp)) |
0fe492db TM |
7890 | return nfserr_reclaim_bad; |
7891 | ||
7892 | return nfs_ok; | |
1da177e4 LT |
7893 | } |
7894 | ||
c2f1a551 MS |
7895 | /* |
7896 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
7897 | * client may quite reasonably hang on to a delegation as long as it has | |
7898 | * the inode cached. This becomes an obvious problem the first time a | |
7899 | * client's inode cache approaches the size of the server's total memory. | |
7900 | * | |
7901 | * For now we avoid this problem by imposing a hard limit on the number | |
7902 | * of delegations, which varies according to the server's memory size. | |
7903 | */ | |
7904 | static void | |
7905 | set_max_delegations(void) | |
7906 | { | |
7907 | /* | |
7908 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
7909 | * estimates suggest that in the worst case (where every delegation | |
7910 | * is for a different inode), a delegation could take about 1.5K, | |
7911 | * giving a worst case usage of about 6% of memory. | |
7912 | */ | |
7913 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
7914 | } | |
7915 | ||
d85ed443 | 7916 | static int nfs4_state_create_net(struct net *net) |
8daae4dc SK |
7917 | { |
7918 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
7919 | int i; | |
7920 | ||
6da2ec56 KC |
7921 | nn->conf_id_hashtbl = kmalloc_array(CLIENT_HASH_SIZE, |
7922 | sizeof(struct list_head), | |
7923 | GFP_KERNEL); | |
8daae4dc | 7924 | if (!nn->conf_id_hashtbl) |
382a62e7 | 7925 | goto err; |
6da2ec56 KC |
7926 | nn->unconf_id_hashtbl = kmalloc_array(CLIENT_HASH_SIZE, |
7927 | sizeof(struct list_head), | |
7928 | GFP_KERNEL); | |
0a7ec377 SK |
7929 | if (!nn->unconf_id_hashtbl) |
7930 | goto err_unconf_id; | |
6da2ec56 KC |
7931 | nn->sessionid_hashtbl = kmalloc_array(SESSION_HASH_SIZE, |
7932 | sizeof(struct list_head), | |
7933 | GFP_KERNEL); | |
1872de0e SK |
7934 | if (!nn->sessionid_hashtbl) |
7935 | goto err_sessionid; | |
8daae4dc | 7936 | |
382a62e7 | 7937 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
8daae4dc | 7938 | INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]); |
0a7ec377 | 7939 | INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]); |
382a62e7 | 7940 | } |
1872de0e SK |
7941 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
7942 | INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]); | |
382a62e7 | 7943 | nn->conf_name_tree = RB_ROOT; |
a99454aa | 7944 | nn->unconf_name_tree = RB_ROOT; |
9cc76801 | 7945 | nn->boot_time = ktime_get_real_seconds(); |
81833de1 VA |
7946 | nn->grace_ended = false; |
7947 | nn->nfsd4_manager.block_opens = true; | |
7948 | INIT_LIST_HEAD(&nn->nfsd4_manager.list); | |
5ed58bb2 | 7949 | INIT_LIST_HEAD(&nn->client_lru); |
73758fed | 7950 | INIT_LIST_HEAD(&nn->close_lru); |
e8c69d17 | 7951 | INIT_LIST_HEAD(&nn->del_recall_lru); |
c9a49628 | 7952 | spin_lock_init(&nn->client_lock); |
e0639dc5 OK |
7953 | spin_lock_init(&nn->s2s_cp_lock); |
7954 | idr_init(&nn->s2s_cp_stateids); | |
8daae4dc | 7955 | |
0cc11a61 JL |
7956 | spin_lock_init(&nn->blocked_locks_lock); |
7957 | INIT_LIST_HEAD(&nn->blocked_locks_lru); | |
7958 | ||
09121281 | 7959 | INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main); |
7746b32f | 7960 | INIT_DELAYED_WORK(&nn->nfsd_shrinker_work, courtesy_client_reaper); |
d85ed443 | 7961 | get_net(net); |
09121281 | 7962 | |
8daae4dc | 7963 | return 0; |
382a62e7 | 7964 | |
1872de0e | 7965 | err_sessionid: |
9b531137 | 7966 | kfree(nn->unconf_id_hashtbl); |
0a7ec377 SK |
7967 | err_unconf_id: |
7968 | kfree(nn->conf_id_hashtbl); | |
382a62e7 SK |
7969 | err: |
7970 | return -ENOMEM; | |
8daae4dc SK |
7971 | } |
7972 | ||
7973 | static void | |
4dce0ac9 | 7974 | nfs4_state_destroy_net(struct net *net) |
8daae4dc SK |
7975 | { |
7976 | int i; | |
7977 | struct nfs4_client *clp = NULL; | |
7978 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
7979 | ||
7980 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { | |
7981 | while (!list_empty(&nn->conf_id_hashtbl[i])) { | |
7982 | clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
7983 | destroy_client(clp); | |
7984 | } | |
7985 | } | |
a99454aa | 7986 | |
68ef3bc3 JL |
7987 | WARN_ON(!list_empty(&nn->blocked_locks_lru)); |
7988 | ||
2b905635 KM |
7989 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
7990 | while (!list_empty(&nn->unconf_id_hashtbl[i])) { | |
7991 | clp = list_entry(nn->unconf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
7992 | destroy_client(clp); | |
7993 | } | |
a99454aa SK |
7994 | } |
7995 | ||
1872de0e | 7996 | kfree(nn->sessionid_hashtbl); |
0a7ec377 | 7997 | kfree(nn->unconf_id_hashtbl); |
8daae4dc | 7998 | kfree(nn->conf_id_hashtbl); |
4dce0ac9 | 7999 | put_net(net); |
8daae4dc SK |
8000 | } |
8001 | ||
f252bc68 | 8002 | int |
d85ed443 | 8003 | nfs4_state_start_net(struct net *net) |
ac4d8ff2 | 8004 | { |
5e1533c7 | 8005 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b5a1a81e BF |
8006 | int ret; |
8007 | ||
681370f4 | 8008 | ret = nfs4_state_create_net(net); |
c6c7f2a8 | 8009 | if (ret) |
681370f4 | 8010 | return ret; |
d4318acd JL |
8011 | locks_start_grace(net, &nn->nfsd4_manager); |
8012 | nfsd4_client_tracking_init(net); | |
362063a5 SM |
8013 | if (nn->track_reclaim_completes && nn->reclaim_str_hashtbl_size == 0) |
8014 | goto skip_grace; | |
20b7d86f | 8015 | printk(KERN_INFO "NFSD: starting %lld-second grace period (net %x)\n", |
7e981a8a | 8016 | nn->nfsd4_grace, net->ns.inum); |
dd5e3fbc | 8017 | trace_nfsd_grace_start(nn); |
5284b44e | 8018 | queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ); |
d85ed443 | 8019 | return 0; |
362063a5 SM |
8020 | |
8021 | skip_grace: | |
8022 | printk(KERN_INFO "NFSD: no clients to reclaim, skipping NFSv4 grace period (net %x)\n", | |
8023 | net->ns.inum); | |
8024 | queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_lease * HZ); | |
8025 | nfsd4_end_grace(nn); | |
8026 | return 0; | |
d85ed443 SK |
8027 | } |
8028 | ||
8029 | /* initialization to perform when the nfsd service is started: */ | |
8030 | ||
8031 | int | |
8032 | nfs4_state_start(void) | |
8033 | { | |
8034 | int ret; | |
8035 | ||
b5a1a81e BF |
8036 | ret = nfsd4_create_callback_queue(); |
8037 | if (ret) | |
d76cc46b | 8038 | return ret; |
09121281 | 8039 | |
c2f1a551 | 8040 | set_max_delegations(); |
b5a1a81e | 8041 | return 0; |
1da177e4 LT |
8042 | } |
8043 | ||
f252bc68 | 8044 | void |
4dce0ac9 | 8045 | nfs4_state_shutdown_net(struct net *net) |
1da177e4 | 8046 | { |
1da177e4 | 8047 | struct nfs4_delegation *dp = NULL; |
1da177e4 | 8048 | struct list_head *pos, *next, reaplist; |
4dce0ac9 | 8049 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
1da177e4 | 8050 | |
4dce0ac9 SK |
8051 | cancel_delayed_work_sync(&nn->laundromat_work); |
8052 | locks_end_grace(&nn->nfsd4_manager); | |
ac55fdc4 | 8053 | |
1da177e4 | 8054 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 8055 | spin_lock(&state_lock); |
e8c69d17 | 8056 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 | 8057 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
3fcbbd24 | 8058 | WARN_ON(!unhash_delegation_locked(dp)); |
42690676 | 8059 | list_add(&dp->dl_recall_lru, &reaplist); |
1da177e4 | 8060 | } |
cdc97505 | 8061 | spin_unlock(&state_lock); |
1da177e4 LT |
8062 | list_for_each_safe(pos, next, &reaplist) { |
8063 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
42690676 | 8064 | list_del_init(&dp->dl_recall_lru); |
0af6e690 | 8065 | destroy_unhashed_deleg(dp); |
1da177e4 LT |
8066 | } |
8067 | ||
3320fef1 | 8068 | nfsd4_client_tracking_exit(net); |
4dce0ac9 | 8069 | nfs4_state_destroy_net(net); |
f4e44b39 DN |
8070 | #ifdef CONFIG_NFSD_V4_2_INTER_SSC |
8071 | nfsd4_ssc_shutdown_umount(nn); | |
8072 | #endif | |
1da177e4 LT |
8073 | } |
8074 | ||
8075 | void | |
8076 | nfs4_state_shutdown(void) | |
8077 | { | |
c3935e30 | 8078 | nfsd4_destroy_callback_queue(); |
1da177e4 | 8079 | } |
8b70484c TM |
8080 | |
8081 | static void | |
8082 | get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
8083 | { | |
51100d2b OK |
8084 | if (HAS_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG) && |
8085 | CURRENT_STATEID(stateid)) | |
37c593c5 | 8086 | memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); |
8b70484c TM |
8087 | } |
8088 | ||
8089 | static void | |
8090 | put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
8091 | { | |
37c593c5 TM |
8092 | if (cstate->minorversion) { |
8093 | memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); | |
51100d2b | 8094 | SET_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG); |
37c593c5 TM |
8095 | } |
8096 | } | |
8097 | ||
8098 | void | |
8099 | clear_current_stateid(struct nfsd4_compound_state *cstate) | |
8100 | { | |
51100d2b | 8101 | CLEAR_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG); |
8b70484c TM |
8102 | } |
8103 | ||
62cd4a59 TM |
8104 | /* |
8105 | * functions to set current state id | |
8106 | */ | |
9428fe1a | 8107 | void |
b60e9859 CH |
8108 | nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, |
8109 | union nfsd4_op_u *u) | |
9428fe1a | 8110 | { |
b60e9859 | 8111 | put_stateid(cstate, &u->open_downgrade.od_stateid); |
9428fe1a TM |
8112 | } |
8113 | ||
8b70484c | 8114 | void |
b60e9859 CH |
8115 | nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, |
8116 | union nfsd4_op_u *u) | |
8b70484c | 8117 | { |
b60e9859 | 8118 | put_stateid(cstate, &u->open.op_stateid); |
8b70484c TM |
8119 | } |
8120 | ||
62cd4a59 | 8121 | void |
b60e9859 CH |
8122 | nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, |
8123 | union nfsd4_op_u *u) | |
62cd4a59 | 8124 | { |
b60e9859 | 8125 | put_stateid(cstate, &u->close.cl_stateid); |
62cd4a59 TM |
8126 | } |
8127 | ||
8128 | void | |
b60e9859 CH |
8129 | nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, |
8130 | union nfsd4_op_u *u) | |
62cd4a59 | 8131 | { |
b60e9859 | 8132 | put_stateid(cstate, &u->lock.lk_resp_stateid); |
62cd4a59 TM |
8133 | } |
8134 | ||
8135 | /* | |
8136 | * functions to consume current state id | |
8137 | */ | |
1e97b519 | 8138 | |
9428fe1a | 8139 | void |
57832e7b CH |
8140 | nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, |
8141 | union nfsd4_op_u *u) | |
9428fe1a | 8142 | { |
57832e7b | 8143 | get_stateid(cstate, &u->open_downgrade.od_stateid); |
9428fe1a TM |
8144 | } |
8145 | ||
8146 | void | |
57832e7b CH |
8147 | nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, |
8148 | union nfsd4_op_u *u) | |
9428fe1a | 8149 | { |
57832e7b | 8150 | get_stateid(cstate, &u->delegreturn.dr_stateid); |
9428fe1a TM |
8151 | } |
8152 | ||
1e97b519 | 8153 | void |
57832e7b CH |
8154 | nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, |
8155 | union nfsd4_op_u *u) | |
1e97b519 | 8156 | { |
57832e7b | 8157 | get_stateid(cstate, &u->free_stateid.fr_stateid); |
1e97b519 TM |
8158 | } |
8159 | ||
8160 | void | |
57832e7b CH |
8161 | nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, |
8162 | union nfsd4_op_u *u) | |
1e97b519 | 8163 | { |
57832e7b | 8164 | get_stateid(cstate, &u->setattr.sa_stateid); |
1e97b519 TM |
8165 | } |
8166 | ||
8b70484c | 8167 | void |
57832e7b CH |
8168 | nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, |
8169 | union nfsd4_op_u *u) | |
8b70484c | 8170 | { |
57832e7b | 8171 | get_stateid(cstate, &u->close.cl_stateid); |
8b70484c TM |
8172 | } |
8173 | ||
8174 | void | |
57832e7b CH |
8175 | nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, |
8176 | union nfsd4_op_u *u) | |
8b70484c | 8177 | { |
57832e7b | 8178 | get_stateid(cstate, &u->locku.lu_stateid); |
8b70484c | 8179 | } |
30813e27 TM |
8180 | |
8181 | void | |
57832e7b CH |
8182 | nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, |
8183 | union nfsd4_op_u *u) | |
30813e27 | 8184 | { |
57832e7b | 8185 | get_stateid(cstate, &u->read.rd_stateid); |
30813e27 TM |
8186 | } |
8187 | ||
8188 | void | |
57832e7b CH |
8189 | nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, |
8190 | union nfsd4_op_u *u) | |
30813e27 | 8191 | { |
57832e7b | 8192 | get_stateid(cstate, &u->write.wr_stateid); |
30813e27 | 8193 | } |