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> |
9a74af21 | 45 | #include "xdr4.h" |
06b332a5 | 46 | #include "xdr4cb.h" |
0a3adade | 47 | #include "vfs.h" |
bfa4b365 | 48 | #include "current_stateid.h" |
1da177e4 | 49 | |
5e1533c7 | 50 | #include "netns.h" |
9cf514cc | 51 | #include "pnfs.h" |
5e1533c7 | 52 | |
1da177e4 LT |
53 | #define NFSDDBG_FACILITY NFSDDBG_PROC |
54 | ||
f32f3c2d BF |
55 | #define all_ones {{~0,~0},~0} |
56 | static const stateid_t one_stateid = { | |
57 | .si_generation = ~0, | |
58 | .si_opaque = all_ones, | |
59 | }; | |
60 | static const stateid_t zero_stateid = { | |
61 | /* all fields zero */ | |
62 | }; | |
19ff0f28 TM |
63 | static const stateid_t currentstateid = { |
64 | .si_generation = 1, | |
65 | }; | |
5f71ff51 TM |
66 | static const stateid_t close_stateid = { |
67 | .si_generation = 0xffffffffU, | |
68 | }; | |
f32f3c2d | 69 | |
ec6b5d7b | 70 | static u64 current_sessionid = 1; |
fd39ca9a | 71 | |
f32f3c2d BF |
72 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t))) |
73 | #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t))) | |
19ff0f28 | 74 | #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t))) |
631db7f3 | 75 | #define CLOSE_STATEID(stateid) (!memcmp((stateid), &close_stateid, sizeof(stateid_t))) |
1da177e4 | 76 | |
1da177e4 | 77 | /* forward declarations */ |
f9c00c3a | 78 | static bool check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner); |
6011695d | 79 | static void nfs4_free_ol_stateid(struct nfs4_stid *stid); |
1da177e4 | 80 | |
8b671b80 BF |
81 | /* Locking: */ |
82 | ||
8b671b80 BF |
83 | /* |
84 | * Currently used for the del_recall_lru and file hash table. In an | |
85 | * effort to decrease the scope of the client_mutex, this spinlock may | |
86 | * eventually cover more: | |
87 | */ | |
cdc97505 | 88 | static DEFINE_SPINLOCK(state_lock); |
8b671b80 | 89 | |
b401be22 JL |
90 | /* |
91 | * A waitqueue for all in-progress 4.0 CLOSE operations that are waiting for | |
92 | * the refcount on the open stateid to drop. | |
93 | */ | |
94 | static DECLARE_WAIT_QUEUE_HEAD(close_wq); | |
95 | ||
abf1135b CH |
96 | static struct kmem_cache *openowner_slab; |
97 | static struct kmem_cache *lockowner_slab; | |
98 | static struct kmem_cache *file_slab; | |
99 | static struct kmem_cache *stateid_slab; | |
100 | static struct kmem_cache *deleg_slab; | |
8287f009 | 101 | static struct kmem_cache *odstate_slab; |
e60d4398 | 102 | |
66b2b9b2 | 103 | static void free_session(struct nfsd4_session *); |
508dc6e1 | 104 | |
c4cb8974 | 105 | static const struct nfsd4_callback_ops nfsd4_cb_recall_ops; |
76d348fa | 106 | static const struct nfsd4_callback_ops nfsd4_cb_notify_lock_ops; |
0162ac2b | 107 | |
f0f51f5c | 108 | static bool is_session_dead(struct nfsd4_session *ses) |
66b2b9b2 | 109 | { |
f0f51f5c | 110 | return ses->se_flags & NFS4_SESSION_DEAD; |
66b2b9b2 BF |
111 | } |
112 | ||
f0f51f5c | 113 | static __be32 mark_session_dead_locked(struct nfsd4_session *ses, int ref_held_by_me) |
508dc6e1 | 114 | { |
f0f51f5c | 115 | if (atomic_read(&ses->se_ref) > ref_held_by_me) |
66b2b9b2 BF |
116 | return nfserr_jukebox; |
117 | ses->se_flags |= NFS4_SESSION_DEAD; | |
118 | return nfs_ok; | |
508dc6e1 BH |
119 | } |
120 | ||
221a6876 BF |
121 | static bool is_client_expired(struct nfs4_client *clp) |
122 | { | |
123 | return clp->cl_time == 0; | |
124 | } | |
125 | ||
221a6876 BF |
126 | static __be32 get_client_locked(struct nfs4_client *clp) |
127 | { | |
0a880a28 TM |
128 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
129 | ||
130 | lockdep_assert_held(&nn->client_lock); | |
131 | ||
221a6876 BF |
132 | if (is_client_expired(clp)) |
133 | return nfserr_expired; | |
134 | atomic_inc(&clp->cl_refcount); | |
135 | return nfs_ok; | |
136 | } | |
137 | ||
138 | /* must be called under the client_lock */ | |
139 | static inline void | |
140 | renew_client_locked(struct nfs4_client *clp) | |
141 | { | |
142 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
143 | ||
144 | if (is_client_expired(clp)) { | |
145 | WARN_ON(1); | |
146 | printk("%s: client (clientid %08x/%08x) already expired\n", | |
147 | __func__, | |
148 | clp->cl_clientid.cl_boot, | |
149 | clp->cl_clientid.cl_id); | |
150 | return; | |
151 | } | |
152 | ||
153 | dprintk("renewing client (clientid %08x/%08x)\n", | |
154 | clp->cl_clientid.cl_boot, | |
155 | clp->cl_clientid.cl_id); | |
156 | list_move_tail(&clp->cl_lru, &nn->client_lru); | |
157 | clp->cl_time = get_seconds(); | |
158 | } | |
159 | ||
ba138435 | 160 | static void put_client_renew_locked(struct nfs4_client *clp) |
221a6876 | 161 | { |
0a880a28 TM |
162 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
163 | ||
164 | lockdep_assert_held(&nn->client_lock); | |
165 | ||
221a6876 BF |
166 | if (!atomic_dec_and_test(&clp->cl_refcount)) |
167 | return; | |
168 | if (!is_client_expired(clp)) | |
169 | renew_client_locked(clp); | |
170 | } | |
171 | ||
4b24ca7d JL |
172 | static void put_client_renew(struct nfs4_client *clp) |
173 | { | |
174 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
175 | ||
d6c249b4 JL |
176 | if (!atomic_dec_and_lock(&clp->cl_refcount, &nn->client_lock)) |
177 | return; | |
178 | if (!is_client_expired(clp)) | |
179 | renew_client_locked(clp); | |
4b24ca7d JL |
180 | spin_unlock(&nn->client_lock); |
181 | } | |
182 | ||
d4e19e70 TM |
183 | static __be32 nfsd4_get_session_locked(struct nfsd4_session *ses) |
184 | { | |
185 | __be32 status; | |
186 | ||
187 | if (is_session_dead(ses)) | |
188 | return nfserr_badsession; | |
189 | status = get_client_locked(ses->se_client); | |
190 | if (status) | |
191 | return status; | |
192 | atomic_inc(&ses->se_ref); | |
193 | return nfs_ok; | |
194 | } | |
195 | ||
196 | static void nfsd4_put_session_locked(struct nfsd4_session *ses) | |
197 | { | |
198 | struct nfs4_client *clp = ses->se_client; | |
0a880a28 TM |
199 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
200 | ||
201 | lockdep_assert_held(&nn->client_lock); | |
d4e19e70 TM |
202 | |
203 | if (atomic_dec_and_test(&ses->se_ref) && is_session_dead(ses)) | |
204 | free_session(ses); | |
205 | put_client_renew_locked(clp); | |
206 | } | |
207 | ||
208 | static void nfsd4_put_session(struct nfsd4_session *ses) | |
209 | { | |
210 | struct nfs4_client *clp = ses->se_client; | |
211 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
212 | ||
213 | spin_lock(&nn->client_lock); | |
214 | nfsd4_put_session_locked(ses); | |
215 | spin_unlock(&nn->client_lock); | |
216 | } | |
217 | ||
76d348fa JL |
218 | static struct nfsd4_blocked_lock * |
219 | find_blocked_lock(struct nfs4_lockowner *lo, struct knfsd_fh *fh, | |
220 | struct nfsd_net *nn) | |
221 | { | |
222 | struct nfsd4_blocked_lock *cur, *found = NULL; | |
223 | ||
0cc11a61 | 224 | spin_lock(&nn->blocked_locks_lock); |
76d348fa JL |
225 | list_for_each_entry(cur, &lo->lo_blocked, nbl_list) { |
226 | if (fh_match(fh, &cur->nbl_fh)) { | |
227 | list_del_init(&cur->nbl_list); | |
7919d0a2 | 228 | list_del_init(&cur->nbl_lru); |
76d348fa JL |
229 | found = cur; |
230 | break; | |
231 | } | |
232 | } | |
0cc11a61 | 233 | spin_unlock(&nn->blocked_locks_lock); |
76d348fa JL |
234 | if (found) |
235 | posix_unblock_lock(&found->nbl_lock); | |
236 | return found; | |
237 | } | |
238 | ||
239 | static struct nfsd4_blocked_lock * | |
240 | find_or_allocate_block(struct nfs4_lockowner *lo, struct knfsd_fh *fh, | |
241 | struct nfsd_net *nn) | |
242 | { | |
243 | struct nfsd4_blocked_lock *nbl; | |
244 | ||
245 | nbl = find_blocked_lock(lo, fh, nn); | |
246 | if (!nbl) { | |
247 | nbl= kmalloc(sizeof(*nbl), GFP_KERNEL); | |
248 | if (nbl) { | |
249 | fh_copy_shallow(&nbl->nbl_fh, fh); | |
250 | locks_init_lock(&nbl->nbl_lock); | |
251 | nfsd4_init_cb(&nbl->nbl_cb, lo->lo_owner.so_client, | |
252 | &nfsd4_cb_notify_lock_ops, | |
253 | NFSPROC4_CLNT_CB_NOTIFY_LOCK); | |
254 | } | |
255 | } | |
256 | return nbl; | |
257 | } | |
258 | ||
259 | static void | |
260 | free_blocked_lock(struct nfsd4_blocked_lock *nbl) | |
261 | { | |
262 | locks_release_private(&nbl->nbl_lock); | |
263 | kfree(nbl); | |
264 | } | |
265 | ||
797bfd05 JL |
266 | static void |
267 | remove_blocked_locks(struct nfs4_lockowner *lo) | |
268 | { | |
269 | struct nfs4_client *clp = lo->lo_owner.so_client; | |
270 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
271 | struct nfsd4_blocked_lock *nbl; | |
272 | LIST_HEAD(reaplist); | |
273 | ||
274 | /* Dequeue all blocked locks */ | |
275 | spin_lock(&nn->blocked_locks_lock); | |
276 | while (!list_empty(&lo->lo_blocked)) { | |
277 | nbl = list_first_entry(&lo->lo_blocked, | |
278 | struct nfsd4_blocked_lock, | |
279 | nbl_list); | |
280 | list_del_init(&nbl->nbl_list); | |
281 | list_move(&nbl->nbl_lru, &reaplist); | |
282 | } | |
283 | spin_unlock(&nn->blocked_locks_lock); | |
284 | ||
285 | /* Now free them */ | |
286 | while (!list_empty(&reaplist)) { | |
287 | nbl = list_first_entry(&reaplist, struct nfsd4_blocked_lock, | |
288 | nbl_lru); | |
289 | list_del_init(&nbl->nbl_lru); | |
290 | posix_unblock_lock(&nbl->nbl_lock); | |
291 | free_blocked_lock(nbl); | |
292 | } | |
293 | } | |
294 | ||
76d348fa JL |
295 | static int |
296 | nfsd4_cb_notify_lock_done(struct nfsd4_callback *cb, struct rpc_task *task) | |
297 | { | |
298 | /* | |
299 | * Since this is just an optimization, we don't try very hard if it | |
300 | * turns out not to succeed. We'll requeue it on NFS4ERR_DELAY, and | |
301 | * just quit trying on anything else. | |
302 | */ | |
303 | switch (task->tk_status) { | |
304 | case -NFS4ERR_DELAY: | |
305 | rpc_delay(task, 1 * HZ); | |
306 | return 0; | |
307 | default: | |
308 | return 1; | |
309 | } | |
310 | } | |
311 | ||
312 | static void | |
313 | nfsd4_cb_notify_lock_release(struct nfsd4_callback *cb) | |
314 | { | |
315 | struct nfsd4_blocked_lock *nbl = container_of(cb, | |
316 | struct nfsd4_blocked_lock, nbl_cb); | |
317 | ||
318 | free_blocked_lock(nbl); | |
319 | } | |
320 | ||
321 | static const struct nfsd4_callback_ops nfsd4_cb_notify_lock_ops = { | |
322 | .done = nfsd4_cb_notify_lock_done, | |
323 | .release = nfsd4_cb_notify_lock_release, | |
324 | }; | |
325 | ||
b5971afa KM |
326 | static inline struct nfs4_stateowner * |
327 | nfs4_get_stateowner(struct nfs4_stateowner *sop) | |
328 | { | |
329 | atomic_inc(&sop->so_count); | |
330 | return sop; | |
331 | } | |
332 | ||
7ffb5880 | 333 | static int |
d4f0489f | 334 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner) |
7ffb5880 TM |
335 | { |
336 | return (sop->so_owner.len == owner->len) && | |
d4f0489f | 337 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len); |
7ffb5880 TM |
338 | } |
339 | ||
340 | static struct nfs4_openowner * | |
341 | find_openstateowner_str_locked(unsigned int hashval, struct nfsd4_open *open, | |
d4f0489f | 342 | struct nfs4_client *clp) |
7ffb5880 TM |
343 | { |
344 | struct nfs4_stateowner *so; | |
7ffb5880 | 345 | |
d4f0489f | 346 | lockdep_assert_held(&clp->cl_lock); |
7ffb5880 | 347 | |
d4f0489f TM |
348 | list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[hashval], |
349 | so_strhash) { | |
7ffb5880 TM |
350 | if (!so->so_is_open_owner) |
351 | continue; | |
b5971afa KM |
352 | if (same_owner_str(so, &open->op_owner)) |
353 | return openowner(nfs4_get_stateowner(so)); | |
7ffb5880 TM |
354 | } |
355 | return NULL; | |
356 | } | |
357 | ||
358 | static struct nfs4_openowner * | |
359 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, | |
d4f0489f | 360 | struct nfs4_client *clp) |
7ffb5880 TM |
361 | { |
362 | struct nfs4_openowner *oo; | |
363 | ||
d4f0489f TM |
364 | spin_lock(&clp->cl_lock); |
365 | oo = find_openstateowner_str_locked(hashval, open, clp); | |
366 | spin_unlock(&clp->cl_lock); | |
7ffb5880 TM |
367 | return oo; |
368 | } | |
369 | ||
1da177e4 LT |
370 | static inline u32 |
371 | opaque_hashval(const void *ptr, int nbytes) | |
372 | { | |
373 | unsigned char *cptr = (unsigned char *) ptr; | |
374 | ||
375 | u32 x = 0; | |
376 | while (nbytes--) { | |
377 | x *= 37; | |
378 | x += *cptr++; | |
379 | } | |
380 | return x; | |
381 | } | |
382 | ||
5b095e99 | 383 | static void nfsd4_free_file_rcu(struct rcu_head *rcu) |
32513b40 | 384 | { |
5b095e99 JL |
385 | struct nfs4_file *fp = container_of(rcu, struct nfs4_file, fi_rcu); |
386 | ||
387 | kmem_cache_free(file_slab, fp); | |
32513b40 BF |
388 | } |
389 | ||
e6ba76e1 | 390 | void |
13cd2184 N |
391 | put_nfs4_file(struct nfs4_file *fi) |
392 | { | |
02e1215f JL |
393 | might_lock(&state_lock); |
394 | ||
cdc97505 | 395 | if (atomic_dec_and_lock(&fi->fi_ref, &state_lock)) { |
5b095e99 | 396 | hlist_del_rcu(&fi->fi_hash); |
cdc97505 | 397 | spin_unlock(&state_lock); |
8287f009 | 398 | WARN_ON_ONCE(!list_empty(&fi->fi_clnt_odstate)); |
5b095e99 JL |
399 | WARN_ON_ONCE(!list_empty(&fi->fi_delegations)); |
400 | call_rcu(&fi->fi_rcu, nfsd4_free_file_rcu); | |
8b671b80 | 401 | } |
13cd2184 N |
402 | } |
403 | ||
de18643d TM |
404 | static struct file * |
405 | __nfs4_get_fd(struct nfs4_file *f, int oflag) | |
406 | { | |
407 | if (f->fi_fds[oflag]) | |
408 | return get_file(f->fi_fds[oflag]); | |
409 | return NULL; | |
410 | } | |
411 | ||
412 | static struct file * | |
413 | find_writeable_file_locked(struct nfs4_file *f) | |
414 | { | |
415 | struct file *ret; | |
416 | ||
417 | lockdep_assert_held(&f->fi_lock); | |
418 | ||
419 | ret = __nfs4_get_fd(f, O_WRONLY); | |
420 | if (!ret) | |
421 | ret = __nfs4_get_fd(f, O_RDWR); | |
422 | return ret; | |
423 | } | |
424 | ||
425 | static struct file * | |
426 | find_writeable_file(struct nfs4_file *f) | |
427 | { | |
428 | struct file *ret; | |
429 | ||
430 | spin_lock(&f->fi_lock); | |
431 | ret = find_writeable_file_locked(f); | |
432 | spin_unlock(&f->fi_lock); | |
433 | ||
434 | return ret; | |
435 | } | |
436 | ||
437 | static struct file *find_readable_file_locked(struct nfs4_file *f) | |
438 | { | |
439 | struct file *ret; | |
440 | ||
441 | lockdep_assert_held(&f->fi_lock); | |
442 | ||
443 | ret = __nfs4_get_fd(f, O_RDONLY); | |
444 | if (!ret) | |
445 | ret = __nfs4_get_fd(f, O_RDWR); | |
446 | return ret; | |
447 | } | |
448 | ||
449 | static struct file * | |
450 | find_readable_file(struct nfs4_file *f) | |
451 | { | |
452 | struct file *ret; | |
453 | ||
454 | spin_lock(&f->fi_lock); | |
455 | ret = find_readable_file_locked(f); | |
456 | spin_unlock(&f->fi_lock); | |
457 | ||
458 | return ret; | |
459 | } | |
460 | ||
4d227fca | 461 | struct file * |
de18643d TM |
462 | find_any_file(struct nfs4_file *f) |
463 | { | |
464 | struct file *ret; | |
465 | ||
466 | spin_lock(&f->fi_lock); | |
467 | ret = __nfs4_get_fd(f, O_RDWR); | |
468 | if (!ret) { | |
469 | ret = __nfs4_get_fd(f, O_WRONLY); | |
470 | if (!ret) | |
471 | ret = __nfs4_get_fd(f, O_RDONLY); | |
472 | } | |
473 | spin_unlock(&f->fi_lock); | |
474 | return ret; | |
475 | } | |
476 | ||
02a3508d | 477 | static atomic_long_t num_delegations; |
697ce9be | 478 | unsigned long max_delegations; |
ef0f3390 N |
479 | |
480 | /* | |
481 | * Open owner state (share locks) | |
482 | */ | |
483 | ||
16bfdaaf BF |
484 | /* hash tables for lock and open owners */ |
485 | #define OWNER_HASH_BITS 8 | |
486 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
487 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
ef0f3390 | 488 | |
d4f0489f | 489 | static unsigned int ownerstr_hashval(struct xdr_netobj *ownername) |
ddc04c41 BF |
490 | { |
491 | unsigned int ret; | |
492 | ||
493 | ret = opaque_hashval(ownername->data, ownername->len); | |
16bfdaaf | 494 | return ret & OWNER_HASH_MASK; |
ddc04c41 | 495 | } |
ef0f3390 | 496 | |
ef0f3390 N |
497 | /* hash table for nfs4_file */ |
498 | #define FILE_HASH_BITS 8 | |
499 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
35079582 | 500 | |
ca943217 | 501 | static unsigned int nfsd_fh_hashval(struct knfsd_fh *fh) |
ddc04c41 | 502 | { |
ca943217 TM |
503 | return jhash2(fh->fh_base.fh_pad, XDR_QUADLEN(fh->fh_size), 0); |
504 | } | |
505 | ||
506 | static unsigned int file_hashval(struct knfsd_fh *fh) | |
507 | { | |
508 | return nfsd_fh_hashval(fh) & (FILE_HASH_SIZE - 1); | |
509 | } | |
510 | ||
89876f8c | 511 | static struct hlist_head file_hashtbl[FILE_HASH_SIZE]; |
ef0f3390 | 512 | |
12659651 JL |
513 | static void |
514 | __nfs4_file_get_access(struct nfs4_file *fp, u32 access) | |
3477565e | 515 | { |
7214e860 JL |
516 | lockdep_assert_held(&fp->fi_lock); |
517 | ||
12659651 JL |
518 | if (access & NFS4_SHARE_ACCESS_WRITE) |
519 | atomic_inc(&fp->fi_access[O_WRONLY]); | |
520 | if (access & NFS4_SHARE_ACCESS_READ) | |
521 | atomic_inc(&fp->fi_access[O_RDONLY]); | |
3477565e BF |
522 | } |
523 | ||
12659651 JL |
524 | static __be32 |
525 | nfs4_file_get_access(struct nfs4_file *fp, u32 access) | |
998db52c | 526 | { |
7214e860 JL |
527 | lockdep_assert_held(&fp->fi_lock); |
528 | ||
12659651 JL |
529 | /* Does this access mode make sense? */ |
530 | if (access & ~NFS4_SHARE_ACCESS_BOTH) | |
531 | return nfserr_inval; | |
532 | ||
baeb4ff0 JL |
533 | /* Does it conflict with a deny mode already set? */ |
534 | if ((access & fp->fi_share_deny) != 0) | |
535 | return nfserr_share_denied; | |
536 | ||
12659651 JL |
537 | __nfs4_file_get_access(fp, access); |
538 | return nfs_ok; | |
998db52c BF |
539 | } |
540 | ||
baeb4ff0 JL |
541 | static __be32 nfs4_file_check_deny(struct nfs4_file *fp, u32 deny) |
542 | { | |
543 | /* Common case is that there is no deny mode. */ | |
544 | if (deny) { | |
545 | /* Does this deny mode make sense? */ | |
546 | if (deny & ~NFS4_SHARE_DENY_BOTH) | |
547 | return nfserr_inval; | |
548 | ||
549 | if ((deny & NFS4_SHARE_DENY_READ) && | |
550 | atomic_read(&fp->fi_access[O_RDONLY])) | |
551 | return nfserr_share_denied; | |
552 | ||
553 | if ((deny & NFS4_SHARE_DENY_WRITE) && | |
554 | atomic_read(&fp->fi_access[O_WRONLY])) | |
555 | return nfserr_share_denied; | |
556 | } | |
557 | return nfs_ok; | |
558 | } | |
559 | ||
998db52c | 560 | static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
f9d7562f | 561 | { |
de18643d TM |
562 | might_lock(&fp->fi_lock); |
563 | ||
564 | if (atomic_dec_and_lock(&fp->fi_access[oflag], &fp->fi_lock)) { | |
565 | struct file *f1 = NULL; | |
566 | struct file *f2 = NULL; | |
567 | ||
6d338b51 | 568 | swap(f1, fp->fi_fds[oflag]); |
0c7c3e67 | 569 | if (atomic_read(&fp->fi_access[1 - oflag]) == 0) |
6d338b51 | 570 | swap(f2, fp->fi_fds[O_RDWR]); |
de18643d TM |
571 | spin_unlock(&fp->fi_lock); |
572 | if (f1) | |
573 | fput(f1); | |
574 | if (f2) | |
575 | fput(f2); | |
f9d7562f BF |
576 | } |
577 | } | |
578 | ||
12659651 | 579 | static void nfs4_file_put_access(struct nfs4_file *fp, u32 access) |
998db52c | 580 | { |
12659651 JL |
581 | WARN_ON_ONCE(access & ~NFS4_SHARE_ACCESS_BOTH); |
582 | ||
583 | if (access & NFS4_SHARE_ACCESS_WRITE) | |
998db52c | 584 | __nfs4_file_put_access(fp, O_WRONLY); |
12659651 JL |
585 | if (access & NFS4_SHARE_ACCESS_READ) |
586 | __nfs4_file_put_access(fp, O_RDONLY); | |
998db52c BF |
587 | } |
588 | ||
8287f009 SB |
589 | /* |
590 | * Allocate a new open/delegation state counter. This is needed for | |
591 | * pNFS for proper return on close semantics. | |
592 | * | |
593 | * Note that we only allocate it for pNFS-enabled exports, otherwise | |
594 | * all pointers to struct nfs4_clnt_odstate are always NULL. | |
595 | */ | |
596 | static struct nfs4_clnt_odstate * | |
597 | alloc_clnt_odstate(struct nfs4_client *clp) | |
598 | { | |
599 | struct nfs4_clnt_odstate *co; | |
600 | ||
601 | co = kmem_cache_zalloc(odstate_slab, GFP_KERNEL); | |
602 | if (co) { | |
603 | co->co_client = clp; | |
604 | atomic_set(&co->co_odcount, 1); | |
605 | } | |
606 | return co; | |
607 | } | |
608 | ||
609 | static void | |
610 | hash_clnt_odstate_locked(struct nfs4_clnt_odstate *co) | |
611 | { | |
612 | struct nfs4_file *fp = co->co_file; | |
613 | ||
614 | lockdep_assert_held(&fp->fi_lock); | |
615 | list_add(&co->co_perfile, &fp->fi_clnt_odstate); | |
616 | } | |
617 | ||
618 | static inline void | |
619 | get_clnt_odstate(struct nfs4_clnt_odstate *co) | |
620 | { | |
621 | if (co) | |
622 | atomic_inc(&co->co_odcount); | |
623 | } | |
624 | ||
625 | static void | |
626 | put_clnt_odstate(struct nfs4_clnt_odstate *co) | |
627 | { | |
628 | struct nfs4_file *fp; | |
629 | ||
630 | if (!co) | |
631 | return; | |
632 | ||
633 | fp = co->co_file; | |
634 | if (atomic_dec_and_lock(&co->co_odcount, &fp->fi_lock)) { | |
635 | list_del(&co->co_perfile); | |
636 | spin_unlock(&fp->fi_lock); | |
637 | ||
638 | nfsd4_return_all_file_layouts(co->co_client, fp); | |
639 | kmem_cache_free(odstate_slab, co); | |
640 | } | |
641 | } | |
642 | ||
643 | static struct nfs4_clnt_odstate * | |
644 | find_or_hash_clnt_odstate(struct nfs4_file *fp, struct nfs4_clnt_odstate *new) | |
645 | { | |
646 | struct nfs4_clnt_odstate *co; | |
647 | struct nfs4_client *cl; | |
648 | ||
649 | if (!new) | |
650 | return NULL; | |
651 | ||
652 | cl = new->co_client; | |
653 | ||
654 | spin_lock(&fp->fi_lock); | |
655 | list_for_each_entry(co, &fp->fi_clnt_odstate, co_perfile) { | |
656 | if (co->co_client == cl) { | |
657 | get_clnt_odstate(co); | |
658 | goto out; | |
659 | } | |
660 | } | |
661 | co = new; | |
662 | co->co_file = fp; | |
663 | hash_clnt_odstate_locked(new); | |
664 | out: | |
665 | spin_unlock(&fp->fi_lock); | |
666 | return co; | |
667 | } | |
668 | ||
d19fb70d KM |
669 | struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct kmem_cache *slab, |
670 | void (*sc_free)(struct nfs4_stid *)) | |
2a74aba7 | 671 | { |
3abdb607 | 672 | struct nfs4_stid *stid; |
6136d2b4 | 673 | int new_id; |
2a74aba7 | 674 | |
f8338834 | 675 | stid = kmem_cache_zalloc(slab, GFP_KERNEL); |
3abdb607 BF |
676 | if (!stid) |
677 | return NULL; | |
678 | ||
4770d722 JL |
679 | idr_preload(GFP_KERNEL); |
680 | spin_lock(&cl->cl_lock); | |
681 | new_id = idr_alloc_cyclic(&cl->cl_stateids, stid, 0, 0, GFP_NOWAIT); | |
682 | spin_unlock(&cl->cl_lock); | |
683 | idr_preload_end(); | |
ebd6c707 | 684 | if (new_id < 0) |
3abdb607 | 685 | goto out_free; |
d19fb70d KM |
686 | |
687 | stid->sc_free = sc_free; | |
2a74aba7 | 688 | stid->sc_client = cl; |
3abdb607 BF |
689 | stid->sc_stateid.si_opaque.so_id = new_id; |
690 | stid->sc_stateid.si_opaque.so_clid = cl->cl_clientid; | |
2a74aba7 | 691 | /* Will be incremented before return to client: */ |
72c0b0fb | 692 | atomic_set(&stid->sc_count, 1); |
9767feb2 | 693 | spin_lock_init(&stid->sc_lock); |
996e0938 | 694 | |
996e0938 | 695 | /* |
3abdb607 BF |
696 | * It shouldn't be a problem to reuse an opaque stateid value. |
697 | * I don't think it is for 4.1. But with 4.0 I worry that, for | |
698 | * example, a stray write retransmission could be accepted by | |
699 | * the server when it should have been rejected. Therefore, | |
700 | * adopt a trick from the sctp code to attempt to maximize the | |
701 | * amount of time until an id is reused, by ensuring they always | |
702 | * "increase" (mod INT_MAX): | |
996e0938 | 703 | */ |
3abdb607 BF |
704 | return stid; |
705 | out_free: | |
2c44a234 | 706 | kmem_cache_free(slab, stid); |
3abdb607 | 707 | return NULL; |
2a74aba7 BF |
708 | } |
709 | ||
b49e084d | 710 | static struct nfs4_ol_stateid * nfs4_alloc_open_stateid(struct nfs4_client *clp) |
4cdc951b | 711 | { |
6011695d | 712 | struct nfs4_stid *stid; |
6011695d | 713 | |
d19fb70d | 714 | stid = nfs4_alloc_stid(clp, stateid_slab, nfs4_free_ol_stateid); |
6011695d TM |
715 | if (!stid) |
716 | return NULL; | |
717 | ||
d19fb70d | 718 | return openlockstateid(stid); |
6011695d TM |
719 | } |
720 | ||
721 | static void nfs4_free_deleg(struct nfs4_stid *stid) | |
722 | { | |
6011695d TM |
723 | kmem_cache_free(deleg_slab, stid); |
724 | atomic_long_dec(&num_delegations); | |
4cdc951b BF |
725 | } |
726 | ||
6282cd56 N |
727 | /* |
728 | * When we recall a delegation, we should be careful not to hand it | |
729 | * out again straight away. | |
730 | * To ensure this we keep a pair of bloom filters ('new' and 'old') | |
731 | * in which the filehandles of recalled delegations are "stored". | |
732 | * If a filehandle appear in either filter, a delegation is blocked. | |
733 | * When a delegation is recalled, the filehandle is stored in the "new" | |
734 | * filter. | |
735 | * Every 30 seconds we swap the filters and clear the "new" one, | |
736 | * unless both are empty of course. | |
737 | * | |
738 | * Each filter is 256 bits. We hash the filehandle to 32bit and use the | |
739 | * low 3 bytes as hash-table indices. | |
740 | * | |
f54fe962 | 741 | * 'blocked_delegations_lock', which is always taken in block_delegations(), |
6282cd56 N |
742 | * is used to manage concurrent access. Testing does not need the lock |
743 | * except when swapping the two filters. | |
744 | */ | |
f54fe962 | 745 | static DEFINE_SPINLOCK(blocked_delegations_lock); |
6282cd56 N |
746 | static struct bloom_pair { |
747 | int entries, old_entries; | |
748 | time_t swap_time; | |
749 | int new; /* index into 'set' */ | |
750 | DECLARE_BITMAP(set[2], 256); | |
751 | } blocked_delegations; | |
752 | ||
753 | static int delegation_blocked(struct knfsd_fh *fh) | |
754 | { | |
755 | u32 hash; | |
756 | struct bloom_pair *bd = &blocked_delegations; | |
757 | ||
758 | if (bd->entries == 0) | |
759 | return 0; | |
760 | if (seconds_since_boot() - bd->swap_time > 30) { | |
f54fe962 | 761 | spin_lock(&blocked_delegations_lock); |
6282cd56 N |
762 | if (seconds_since_boot() - bd->swap_time > 30) { |
763 | bd->entries -= bd->old_entries; | |
764 | bd->old_entries = bd->entries; | |
765 | memset(bd->set[bd->new], 0, | |
766 | sizeof(bd->set[0])); | |
767 | bd->new = 1-bd->new; | |
768 | bd->swap_time = seconds_since_boot(); | |
769 | } | |
f54fe962 | 770 | spin_unlock(&blocked_delegations_lock); |
6282cd56 | 771 | } |
87545899 | 772 | hash = jhash(&fh->fh_base, fh->fh_size, 0); |
6282cd56 N |
773 | if (test_bit(hash&255, bd->set[0]) && |
774 | test_bit((hash>>8)&255, bd->set[0]) && | |
775 | test_bit((hash>>16)&255, bd->set[0])) | |
776 | return 1; | |
777 | ||
778 | if (test_bit(hash&255, bd->set[1]) && | |
779 | test_bit((hash>>8)&255, bd->set[1]) && | |
780 | test_bit((hash>>16)&255, bd->set[1])) | |
781 | return 1; | |
782 | ||
783 | return 0; | |
784 | } | |
785 | ||
786 | static void block_delegations(struct knfsd_fh *fh) | |
787 | { | |
788 | u32 hash; | |
789 | struct bloom_pair *bd = &blocked_delegations; | |
790 | ||
87545899 | 791 | hash = jhash(&fh->fh_base, fh->fh_size, 0); |
6282cd56 | 792 | |
f54fe962 | 793 | spin_lock(&blocked_delegations_lock); |
6282cd56 N |
794 | __set_bit(hash&255, bd->set[bd->new]); |
795 | __set_bit((hash>>8)&255, bd->set[bd->new]); | |
796 | __set_bit((hash>>16)&255, bd->set[bd->new]); | |
797 | if (bd->entries == 0) | |
798 | bd->swap_time = seconds_since_boot(); | |
799 | bd->entries += 1; | |
f54fe962 | 800 | spin_unlock(&blocked_delegations_lock); |
6282cd56 N |
801 | } |
802 | ||
1da177e4 | 803 | static struct nfs4_delegation * |
8287f009 SB |
804 | alloc_init_deleg(struct nfs4_client *clp, struct svc_fh *current_fh, |
805 | struct nfs4_clnt_odstate *odstate) | |
1da177e4 LT |
806 | { |
807 | struct nfs4_delegation *dp; | |
02a3508d | 808 | long n; |
1da177e4 LT |
809 | |
810 | dprintk("NFSD alloc_init_deleg\n"); | |
02a3508d TM |
811 | n = atomic_long_inc_return(&num_delegations); |
812 | if (n < 0 || n > max_delegations) | |
813 | goto out_dec; | |
6282cd56 | 814 | if (delegation_blocked(¤t_fh->fh_handle)) |
02a3508d | 815 | goto out_dec; |
d19fb70d | 816 | dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab, nfs4_free_deleg)); |
5b2d21c1 | 817 | if (dp == NULL) |
02a3508d | 818 | goto out_dec; |
6011695d | 819 | |
2a74aba7 BF |
820 | /* |
821 | * delegation seqid's are never incremented. The 4.1 special | |
6136d2b4 BF |
822 | * meaning of seqid 0 isn't meaningful, really, but let's avoid |
823 | * 0 anyway just for consistency and use 1: | |
2a74aba7 BF |
824 | */ |
825 | dp->dl_stid.sc_stateid.si_generation = 1; | |
ea1da636 N |
826 | INIT_LIST_HEAD(&dp->dl_perfile); |
827 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 | 828 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
8287f009 SB |
829 | dp->dl_clnt_odstate = odstate; |
830 | get_clnt_odstate(odstate); | |
99c41515 | 831 | dp->dl_type = NFS4_OPEN_DELEGATE_READ; |
f0b5de1b CH |
832 | dp->dl_retries = 1; |
833 | nfsd4_init_cb(&dp->dl_recall, dp->dl_stid.sc_client, | |
0162ac2b | 834 | &nfsd4_cb_recall_ops, NFSPROC4_CLNT_CB_RECALL); |
1da177e4 | 835 | return dp; |
02a3508d TM |
836 | out_dec: |
837 | atomic_long_dec(&num_delegations); | |
838 | return NULL; | |
1da177e4 LT |
839 | } |
840 | ||
841 | void | |
6011695d | 842 | nfs4_put_stid(struct nfs4_stid *s) |
1da177e4 | 843 | { |
11b9164a | 844 | struct nfs4_file *fp = s->sc_file; |
6011695d TM |
845 | struct nfs4_client *clp = s->sc_client; |
846 | ||
4770d722 JL |
847 | might_lock(&clp->cl_lock); |
848 | ||
b401be22 JL |
849 | if (!atomic_dec_and_lock(&s->sc_count, &clp->cl_lock)) { |
850 | wake_up_all(&close_wq); | |
6011695d | 851 | return; |
b401be22 | 852 | } |
6011695d | 853 | idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id); |
4770d722 | 854 | spin_unlock(&clp->cl_lock); |
6011695d | 855 | s->sc_free(s); |
11b9164a TM |
856 | if (fp) |
857 | put_nfs4_file(fp); | |
1da177e4 LT |
858 | } |
859 | ||
9767feb2 JL |
860 | void |
861 | nfs4_inc_and_copy_stateid(stateid_t *dst, struct nfs4_stid *stid) | |
862 | { | |
863 | stateid_t *src = &stid->sc_stateid; | |
864 | ||
865 | spin_lock(&stid->sc_lock); | |
866 | if (unlikely(++src->si_generation == 0)) | |
867 | src->si_generation = 1; | |
868 | memcpy(dst, src, sizeof(*dst)); | |
869 | spin_unlock(&stid->sc_lock); | |
870 | } | |
871 | ||
acfdf5c3 | 872 | static void nfs4_put_deleg_lease(struct nfs4_file *fp) |
1da177e4 | 873 | { |
6bcc034e | 874 | struct file *filp = NULL; |
417c6629 | 875 | |
6bcc034e | 876 | spin_lock(&fp->fi_lock); |
67db1034 | 877 | if (fp->fi_deleg_file && --fp->fi_delegees == 0) |
6bcc034e | 878 | swap(filp, fp->fi_deleg_file); |
6bcc034e JL |
879 | spin_unlock(&fp->fi_lock); |
880 | ||
881 | if (filp) { | |
2ab99ee1 | 882 | vfs_setlease(filp, F_UNLCK, NULL, (void **)&fp); |
6bcc034e | 883 | fput(filp); |
acfdf5c3 | 884 | } |
1da177e4 LT |
885 | } |
886 | ||
cd61c522 | 887 | void nfs4_unhash_stid(struct nfs4_stid *s) |
6136d2b4 | 888 | { |
3abdb607 | 889 | s->sc_type = 0; |
6136d2b4 BF |
890 | } |
891 | ||
34ed9872 AE |
892 | /** |
893 | * nfs4_get_existing_delegation - Discover if this delegation already exists | |
894 | * @clp: a pointer to the nfs4_client we're granting a delegation to | |
895 | * @fp: a pointer to the nfs4_file we're granting a delegation on | |
896 | * | |
897 | * Return: | |
898 | * On success: NULL if an existing delegation was not found. | |
899 | * | |
900 | * On error: -EAGAIN if one was previously granted to this nfs4_client | |
901 | * for this nfs4_file. | |
902 | * | |
903 | */ | |
904 | ||
905 | static int | |
906 | nfs4_get_existing_delegation(struct nfs4_client *clp, struct nfs4_file *fp) | |
907 | { | |
908 | struct nfs4_delegation *searchdp = NULL; | |
909 | struct nfs4_client *searchclp = NULL; | |
910 | ||
911 | lockdep_assert_held(&state_lock); | |
912 | lockdep_assert_held(&fp->fi_lock); | |
913 | ||
914 | list_for_each_entry(searchdp, &fp->fi_delegations, dl_perfile) { | |
915 | searchclp = searchdp->dl_stid.sc_client; | |
916 | if (clp == searchclp) { | |
917 | return -EAGAIN; | |
918 | } | |
919 | } | |
920 | return 0; | |
921 | } | |
922 | ||
923 | /** | |
924 | * hash_delegation_locked - Add a delegation to the appropriate lists | |
925 | * @dp: a pointer to the nfs4_delegation we are adding. | |
926 | * @fp: a pointer to the nfs4_file we're granting a delegation on | |
927 | * | |
928 | * Return: | |
929 | * On success: NULL if the delegation was successfully hashed. | |
930 | * | |
931 | * On error: -EAGAIN if one was previously granted to this | |
932 | * nfs4_client for this nfs4_file. Delegation is not hashed. | |
933 | * | |
934 | */ | |
935 | ||
936 | static int | |
931ee56c BH |
937 | hash_delegation_locked(struct nfs4_delegation *dp, struct nfs4_file *fp) |
938 | { | |
34ed9872 AE |
939 | int status; |
940 | struct nfs4_client *clp = dp->dl_stid.sc_client; | |
941 | ||
cdc97505 | 942 | lockdep_assert_held(&state_lock); |
417c6629 | 943 | lockdep_assert_held(&fp->fi_lock); |
931ee56c | 944 | |
34ed9872 AE |
945 | status = nfs4_get_existing_delegation(clp, fp); |
946 | if (status) | |
947 | return status; | |
948 | ++fp->fi_delegees; | |
67cb1279 | 949 | atomic_inc(&dp->dl_stid.sc_count); |
3fb87d13 | 950 | dp->dl_stid.sc_type = NFS4_DELEG_STID; |
931ee56c | 951 | list_add(&dp->dl_perfile, &fp->fi_delegations); |
34ed9872 AE |
952 | list_add(&dp->dl_perclnt, &clp->cl_delegations); |
953 | return 0; | |
931ee56c BH |
954 | } |
955 | ||
3fcbbd24 | 956 | static bool |
42690676 | 957 | unhash_delegation_locked(struct nfs4_delegation *dp) |
1da177e4 | 958 | { |
11b9164a | 959 | struct nfs4_file *fp = dp->dl_stid.sc_file; |
02e1215f | 960 | |
42690676 JL |
961 | lockdep_assert_held(&state_lock); |
962 | ||
3fcbbd24 JL |
963 | if (list_empty(&dp->dl_perfile)) |
964 | return false; | |
965 | ||
b0fc29d6 | 966 | dp->dl_stid.sc_type = NFS4_CLOSED_DELEG_STID; |
d55a166c JL |
967 | /* Ensure that deleg break won't try to requeue it */ |
968 | ++dp->dl_time; | |
417c6629 | 969 | spin_lock(&fp->fi_lock); |
931ee56c | 970 | list_del_init(&dp->dl_perclnt); |
1da177e4 | 971 | list_del_init(&dp->dl_recall_lru); |
02e1215f JL |
972 | list_del_init(&dp->dl_perfile); |
973 | spin_unlock(&fp->fi_lock); | |
3fcbbd24 | 974 | return true; |
3bd64a5b BF |
975 | } |
976 | ||
3bd64a5b BF |
977 | static void destroy_delegation(struct nfs4_delegation *dp) |
978 | { | |
3fcbbd24 JL |
979 | bool unhashed; |
980 | ||
42690676 | 981 | spin_lock(&state_lock); |
3fcbbd24 | 982 | unhashed = unhash_delegation_locked(dp); |
42690676 | 983 | spin_unlock(&state_lock); |
3fcbbd24 JL |
984 | if (unhashed) { |
985 | put_clnt_odstate(dp->dl_clnt_odstate); | |
986 | nfs4_put_deleg_lease(dp->dl_stid.sc_file); | |
987 | nfs4_put_stid(&dp->dl_stid); | |
988 | } | |
3bd64a5b BF |
989 | } |
990 | ||
991 | static void revoke_delegation(struct nfs4_delegation *dp) | |
992 | { | |
993 | struct nfs4_client *clp = dp->dl_stid.sc_client; | |
994 | ||
2d4a532d JL |
995 | WARN_ON(!list_empty(&dp->dl_recall_lru)); |
996 | ||
8287f009 | 997 | put_clnt_odstate(dp->dl_clnt_odstate); |
afbda402 JL |
998 | nfs4_put_deleg_lease(dp->dl_stid.sc_file); |
999 | ||
3bd64a5b | 1000 | if (clp->cl_minorversion == 0) |
6011695d | 1001 | nfs4_put_stid(&dp->dl_stid); |
3bd64a5b | 1002 | else { |
3bd64a5b | 1003 | dp->dl_stid.sc_type = NFS4_REVOKED_DELEG_STID; |
2d4a532d JL |
1004 | spin_lock(&clp->cl_lock); |
1005 | list_add(&dp->dl_recall_lru, &clp->cl_revoked); | |
1006 | spin_unlock(&clp->cl_lock); | |
3bd64a5b BF |
1007 | } |
1008 | } | |
1009 | ||
1da177e4 LT |
1010 | /* |
1011 | * SETCLIENTID state | |
1012 | */ | |
1013 | ||
ddc04c41 BF |
1014 | static unsigned int clientid_hashval(u32 id) |
1015 | { | |
1016 | return id & CLIENT_HASH_MASK; | |
1017 | } | |
1018 | ||
1019 | static unsigned int clientstr_hashval(const char *name) | |
1020 | { | |
1021 | return opaque_hashval(name, 8) & CLIENT_HASH_MASK; | |
1022 | } | |
1023 | ||
f9d7562f BF |
1024 | /* |
1025 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
1026 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
1027 | * only what share bits are currently in force, but also what | |
1028 | * combinations of share bits previous opens have used. This allows us | |
1029 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
1030 | * return an error if the client attempt to downgrade to a combination | |
1031 | * of share bits not explicable by closing some of its previous opens. | |
1032 | * | |
1033 | * XXX: This enforcement is actually incomplete, since we don't keep | |
1034 | * track of access/deny bit combinations; so, e.g., we allow: | |
1035 | * | |
1036 | * OPEN allow read, deny write | |
1037 | * OPEN allow both, deny none | |
1038 | * DOWNGRADE allow read, deny none | |
1039 | * | |
1040 | * which we should reject. | |
1041 | */ | |
5ae037e5 JL |
1042 | static unsigned int |
1043 | bmap_to_share_mode(unsigned long bmap) { | |
f9d7562f | 1044 | int i; |
5ae037e5 | 1045 | unsigned int access = 0; |
f9d7562f | 1046 | |
f9d7562f BF |
1047 | for (i = 1; i < 4; i++) { |
1048 | if (test_bit(i, &bmap)) | |
5ae037e5 | 1049 | access |= i; |
f9d7562f | 1050 | } |
5ae037e5 | 1051 | return access; |
f9d7562f BF |
1052 | } |
1053 | ||
82c5ff1b JL |
1054 | /* set share access for a given stateid */ |
1055 | static inline void | |
1056 | set_access(u32 access, struct nfs4_ol_stateid *stp) | |
1057 | { | |
c11c591f JL |
1058 | unsigned char mask = 1 << access; |
1059 | ||
1060 | WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH); | |
1061 | stp->st_access_bmap |= mask; | |
82c5ff1b JL |
1062 | } |
1063 | ||
1064 | /* clear share access for a given stateid */ | |
1065 | static inline void | |
1066 | clear_access(u32 access, struct nfs4_ol_stateid *stp) | |
1067 | { | |
c11c591f JL |
1068 | unsigned char mask = 1 << access; |
1069 | ||
1070 | WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH); | |
1071 | stp->st_access_bmap &= ~mask; | |
82c5ff1b JL |
1072 | } |
1073 | ||
1074 | /* test whether a given stateid has access */ | |
1075 | static inline bool | |
1076 | test_access(u32 access, struct nfs4_ol_stateid *stp) | |
1077 | { | |
c11c591f JL |
1078 | unsigned char mask = 1 << access; |
1079 | ||
1080 | return (bool)(stp->st_access_bmap & mask); | |
82c5ff1b JL |
1081 | } |
1082 | ||
ce0fc43c JL |
1083 | /* set share deny for a given stateid */ |
1084 | static inline void | |
c11c591f | 1085 | set_deny(u32 deny, struct nfs4_ol_stateid *stp) |
ce0fc43c | 1086 | { |
c11c591f JL |
1087 | unsigned char mask = 1 << deny; |
1088 | ||
1089 | WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH); | |
1090 | stp->st_deny_bmap |= mask; | |
ce0fc43c JL |
1091 | } |
1092 | ||
1093 | /* clear share deny for a given stateid */ | |
1094 | static inline void | |
c11c591f | 1095 | clear_deny(u32 deny, struct nfs4_ol_stateid *stp) |
ce0fc43c | 1096 | { |
c11c591f JL |
1097 | unsigned char mask = 1 << deny; |
1098 | ||
1099 | WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH); | |
1100 | stp->st_deny_bmap &= ~mask; | |
ce0fc43c JL |
1101 | } |
1102 | ||
1103 | /* test whether a given stateid is denying specific access */ | |
1104 | static inline bool | |
c11c591f | 1105 | test_deny(u32 deny, struct nfs4_ol_stateid *stp) |
ce0fc43c | 1106 | { |
c11c591f JL |
1107 | unsigned char mask = 1 << deny; |
1108 | ||
1109 | return (bool)(stp->st_deny_bmap & mask); | |
f9d7562f BF |
1110 | } |
1111 | ||
1112 | static int nfs4_access_to_omode(u32 access) | |
1113 | { | |
8f34a430 | 1114 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
1115 | case NFS4_SHARE_ACCESS_READ: |
1116 | return O_RDONLY; | |
1117 | case NFS4_SHARE_ACCESS_WRITE: | |
1118 | return O_WRONLY; | |
1119 | case NFS4_SHARE_ACCESS_BOTH: | |
1120 | return O_RDWR; | |
1121 | } | |
063b0fb9 BF |
1122 | WARN_ON_ONCE(1); |
1123 | return O_RDONLY; | |
f9d7562f BF |
1124 | } |
1125 | ||
baeb4ff0 JL |
1126 | /* |
1127 | * A stateid that had a deny mode associated with it is being released | |
1128 | * or downgraded. Recalculate the deny mode on the file. | |
1129 | */ | |
1130 | static void | |
1131 | recalculate_deny_mode(struct nfs4_file *fp) | |
1132 | { | |
1133 | struct nfs4_ol_stateid *stp; | |
1134 | ||
1135 | spin_lock(&fp->fi_lock); | |
1136 | fp->fi_share_deny = 0; | |
1137 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) | |
1138 | fp->fi_share_deny |= bmap_to_share_mode(stp->st_deny_bmap); | |
1139 | spin_unlock(&fp->fi_lock); | |
1140 | } | |
1141 | ||
1142 | static void | |
1143 | reset_union_bmap_deny(u32 deny, struct nfs4_ol_stateid *stp) | |
1144 | { | |
1145 | int i; | |
1146 | bool change = false; | |
1147 | ||
1148 | for (i = 1; i < 4; i++) { | |
1149 | if ((i & deny) != i) { | |
1150 | change = true; | |
1151 | clear_deny(i, stp); | |
1152 | } | |
1153 | } | |
1154 | ||
1155 | /* Recalculate per-file deny mode if there was a change */ | |
1156 | if (change) | |
11b9164a | 1157 | recalculate_deny_mode(stp->st_stid.sc_file); |
baeb4ff0 JL |
1158 | } |
1159 | ||
82c5ff1b JL |
1160 | /* release all access and file references for a given stateid */ |
1161 | static void | |
1162 | release_all_access(struct nfs4_ol_stateid *stp) | |
1163 | { | |
1164 | int i; | |
11b9164a | 1165 | struct nfs4_file *fp = stp->st_stid.sc_file; |
baeb4ff0 JL |
1166 | |
1167 | if (fp && stp->st_deny_bmap != 0) | |
1168 | recalculate_deny_mode(fp); | |
82c5ff1b JL |
1169 | |
1170 | for (i = 1; i < 4; i++) { | |
1171 | if (test_access(i, stp)) | |
11b9164a | 1172 | nfs4_file_put_access(stp->st_stid.sc_file, i); |
82c5ff1b JL |
1173 | clear_access(i, stp); |
1174 | } | |
1175 | } | |
1176 | ||
d50ffded KM |
1177 | static inline void nfs4_free_stateowner(struct nfs4_stateowner *sop) |
1178 | { | |
1179 | kfree(sop->so_owner.data); | |
1180 | sop->so_ops->so_free(sop); | |
1181 | } | |
1182 | ||
6b180f0b JL |
1183 | static void nfs4_put_stateowner(struct nfs4_stateowner *sop) |
1184 | { | |
a819ecc1 JL |
1185 | struct nfs4_client *clp = sop->so_client; |
1186 | ||
1187 | might_lock(&clp->cl_lock); | |
1188 | ||
1189 | if (!atomic_dec_and_lock(&sop->so_count, &clp->cl_lock)) | |
6b180f0b | 1190 | return; |
8f4b54c5 | 1191 | sop->so_ops->so_unhash(sop); |
a819ecc1 | 1192 | spin_unlock(&clp->cl_lock); |
d50ffded | 1193 | nfs4_free_stateowner(sop); |
6b180f0b JL |
1194 | } |
1195 | ||
e8568739 | 1196 | static bool unhash_ol_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 1197 | { |
11b9164a | 1198 | struct nfs4_file *fp = stp->st_stid.sc_file; |
1d31a253 | 1199 | |
1c755dc1 JL |
1200 | lockdep_assert_held(&stp->st_stateowner->so_client->cl_lock); |
1201 | ||
e8568739 JL |
1202 | if (list_empty(&stp->st_perfile)) |
1203 | return false; | |
1204 | ||
1d31a253 | 1205 | spin_lock(&fp->fi_lock); |
e8568739 | 1206 | list_del_init(&stp->st_perfile); |
1d31a253 | 1207 | spin_unlock(&fp->fi_lock); |
529d7b2a | 1208 | list_del(&stp->st_perstateowner); |
e8568739 | 1209 | return true; |
529d7b2a BF |
1210 | } |
1211 | ||
6011695d | 1212 | static void nfs4_free_ol_stateid(struct nfs4_stid *stid) |
529d7b2a | 1213 | { |
6011695d | 1214 | struct nfs4_ol_stateid *stp = openlockstateid(stid); |
4665e2ba | 1215 | |
8287f009 | 1216 | put_clnt_odstate(stp->st_clnt_odstate); |
6011695d | 1217 | release_all_access(stp); |
d3134b10 JL |
1218 | if (stp->st_stateowner) |
1219 | nfs4_put_stateowner(stp->st_stateowner); | |
6011695d | 1220 | kmem_cache_free(stateid_slab, stid); |
529d7b2a BF |
1221 | } |
1222 | ||
b49e084d | 1223 | static void nfs4_free_lock_stateid(struct nfs4_stid *stid) |
529d7b2a | 1224 | { |
b49e084d JL |
1225 | struct nfs4_ol_stateid *stp = openlockstateid(stid); |
1226 | struct nfs4_lockowner *lo = lockowner(stp->st_stateowner); | |
529d7b2a BF |
1227 | struct file *file; |
1228 | ||
b49e084d JL |
1229 | file = find_any_file(stp->st_stid.sc_file); |
1230 | if (file) | |
1231 | filp_close(file, (fl_owner_t)lo); | |
1232 | nfs4_free_ol_stateid(stid); | |
1233 | } | |
1234 | ||
2c41beb0 JL |
1235 | /* |
1236 | * Put the persistent reference to an already unhashed generic stateid, while | |
1237 | * holding the cl_lock. If it's the last reference, then put it onto the | |
1238 | * reaplist for later destruction. | |
1239 | */ | |
1240 | static void put_ol_stateid_locked(struct nfs4_ol_stateid *stp, | |
1241 | struct list_head *reaplist) | |
1242 | { | |
1243 | struct nfs4_stid *s = &stp->st_stid; | |
1244 | struct nfs4_client *clp = s->sc_client; | |
1245 | ||
1246 | lockdep_assert_held(&clp->cl_lock); | |
1247 | ||
1248 | WARN_ON_ONCE(!list_empty(&stp->st_locks)); | |
1249 | ||
1250 | if (!atomic_dec_and_test(&s->sc_count)) { | |
1251 | wake_up_all(&close_wq); | |
1252 | return; | |
1253 | } | |
1254 | ||
1255 | idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id); | |
1256 | list_add(&stp->st_locks, reaplist); | |
1257 | } | |
1258 | ||
e8568739 | 1259 | static bool unhash_lock_stateid(struct nfs4_ol_stateid *stp) |
b49e084d | 1260 | { |
f46c445b | 1261 | lockdep_assert_held(&stp->st_stid.sc_client->cl_lock); |
3c1c995c JL |
1262 | |
1263 | list_del_init(&stp->st_locks); | |
cd61c522 | 1264 | nfs4_unhash_stid(&stp->st_stid); |
e8568739 | 1265 | return unhash_ol_stateid(stp); |
3c1c995c JL |
1266 | } |
1267 | ||
1268 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) | |
1269 | { | |
f46c445b | 1270 | struct nfs4_client *clp = stp->st_stid.sc_client; |
e8568739 | 1271 | bool unhashed; |
3c1c995c | 1272 | |
f46c445b | 1273 | spin_lock(&clp->cl_lock); |
e8568739 | 1274 | unhashed = unhash_lock_stateid(stp); |
f46c445b | 1275 | spin_unlock(&clp->cl_lock); |
e8568739 JL |
1276 | if (unhashed) |
1277 | nfs4_put_stid(&stp->st_stid); | |
529d7b2a BF |
1278 | } |
1279 | ||
c58c6610 | 1280 | static void unhash_lockowner_locked(struct nfs4_lockowner *lo) |
8f4b54c5 | 1281 | { |
d4f0489f | 1282 | struct nfs4_client *clp = lo->lo_owner.so_client; |
c58c6610 | 1283 | |
d4f0489f | 1284 | lockdep_assert_held(&clp->cl_lock); |
c58c6610 | 1285 | |
8f4b54c5 JL |
1286 | list_del_init(&lo->lo_owner.so_strhash); |
1287 | } | |
1288 | ||
2c41beb0 JL |
1289 | /* |
1290 | * Free a list of generic stateids that were collected earlier after being | |
1291 | * fully unhashed. | |
1292 | */ | |
1293 | static void | |
1294 | free_ol_stateid_reaplist(struct list_head *reaplist) | |
1295 | { | |
1296 | struct nfs4_ol_stateid *stp; | |
fb94d766 | 1297 | struct nfs4_file *fp; |
2c41beb0 JL |
1298 | |
1299 | might_sleep(); | |
1300 | ||
1301 | while (!list_empty(reaplist)) { | |
1302 | stp = list_first_entry(reaplist, struct nfs4_ol_stateid, | |
1303 | st_locks); | |
1304 | list_del(&stp->st_locks); | |
fb94d766 | 1305 | fp = stp->st_stid.sc_file; |
2c41beb0 | 1306 | stp->st_stid.sc_free(&stp->st_stid); |
fb94d766 KM |
1307 | if (fp) |
1308 | put_nfs4_file(fp); | |
2c41beb0 JL |
1309 | } |
1310 | } | |
1311 | ||
d83017f9 JL |
1312 | static void release_open_stateid_locks(struct nfs4_ol_stateid *open_stp, |
1313 | struct list_head *reaplist) | |
3c87b9b7 TM |
1314 | { |
1315 | struct nfs4_ol_stateid *stp; | |
1316 | ||
e8568739 JL |
1317 | lockdep_assert_held(&open_stp->st_stid.sc_client->cl_lock); |
1318 | ||
3c87b9b7 TM |
1319 | while (!list_empty(&open_stp->st_locks)) { |
1320 | stp = list_entry(open_stp->st_locks.next, | |
1321 | struct nfs4_ol_stateid, st_locks); | |
e8568739 | 1322 | WARN_ON(!unhash_lock_stateid(stp)); |
d83017f9 | 1323 | put_ol_stateid_locked(stp, reaplist); |
529d7b2a BF |
1324 | } |
1325 | } | |
1326 | ||
e8568739 | 1327 | static bool unhash_open_stateid(struct nfs4_ol_stateid *stp, |
d83017f9 | 1328 | struct list_head *reaplist) |
2283963f | 1329 | { |
e8568739 JL |
1330 | bool unhashed; |
1331 | ||
2c41beb0 JL |
1332 | lockdep_assert_held(&stp->st_stid.sc_client->cl_lock); |
1333 | ||
e8568739 | 1334 | unhashed = unhash_ol_stateid(stp); |
d83017f9 | 1335 | release_open_stateid_locks(stp, reaplist); |
e8568739 | 1336 | return unhashed; |
38c387b5 BF |
1337 | } |
1338 | ||
1339 | static void release_open_stateid(struct nfs4_ol_stateid *stp) | |
1340 | { | |
2c41beb0 JL |
1341 | LIST_HEAD(reaplist); |
1342 | ||
1343 | spin_lock(&stp->st_stid.sc_client->cl_lock); | |
e8568739 JL |
1344 | if (unhash_open_stateid(stp, &reaplist)) |
1345 | put_ol_stateid_locked(stp, &reaplist); | |
2c41beb0 JL |
1346 | spin_unlock(&stp->st_stid.sc_client->cl_lock); |
1347 | free_ol_stateid_reaplist(&reaplist); | |
2283963f BF |
1348 | } |
1349 | ||
7ffb5880 | 1350 | static void unhash_openowner_locked(struct nfs4_openowner *oo) |
f1d110ca | 1351 | { |
d4f0489f | 1352 | struct nfs4_client *clp = oo->oo_owner.so_client; |
7ffb5880 | 1353 | |
d4f0489f | 1354 | lockdep_assert_held(&clp->cl_lock); |
7ffb5880 | 1355 | |
8f4b54c5 JL |
1356 | list_del_init(&oo->oo_owner.so_strhash); |
1357 | list_del_init(&oo->oo_perclient); | |
f1d110ca BF |
1358 | } |
1359 | ||
f7a4d872 BF |
1360 | static void release_last_closed_stateid(struct nfs4_openowner *oo) |
1361 | { | |
217526e7 JL |
1362 | struct nfsd_net *nn = net_generic(oo->oo_owner.so_client->net, |
1363 | nfsd_net_id); | |
1364 | struct nfs4_ol_stateid *s; | |
f7a4d872 | 1365 | |
217526e7 JL |
1366 | spin_lock(&nn->client_lock); |
1367 | s = oo->oo_last_closed_stid; | |
f7a4d872 | 1368 | if (s) { |
d3134b10 | 1369 | list_del_init(&oo->oo_close_lru); |
f7a4d872 BF |
1370 | oo->oo_last_closed_stid = NULL; |
1371 | } | |
217526e7 JL |
1372 | spin_unlock(&nn->client_lock); |
1373 | if (s) | |
1374 | nfs4_put_stid(&s->st_stid); | |
f7a4d872 BF |
1375 | } |
1376 | ||
2c41beb0 | 1377 | static void release_openowner(struct nfs4_openowner *oo) |
8f4b54c5 JL |
1378 | { |
1379 | struct nfs4_ol_stateid *stp; | |
d4f0489f | 1380 | struct nfs4_client *clp = oo->oo_owner.so_client; |
2c41beb0 | 1381 | struct list_head reaplist; |
7ffb5880 | 1382 | |
2c41beb0 | 1383 | INIT_LIST_HEAD(&reaplist); |
8f4b54c5 | 1384 | |
2c41beb0 JL |
1385 | spin_lock(&clp->cl_lock); |
1386 | unhash_openowner_locked(oo); | |
8f4b54c5 JL |
1387 | while (!list_empty(&oo->oo_owner.so_stateids)) { |
1388 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
1389 | struct nfs4_ol_stateid, st_perstateowner); | |
e8568739 JL |
1390 | if (unhash_open_stateid(stp, &reaplist)) |
1391 | put_ol_stateid_locked(stp, &reaplist); | |
8f4b54c5 | 1392 | } |
d4f0489f | 1393 | spin_unlock(&clp->cl_lock); |
2c41beb0 | 1394 | free_ol_stateid_reaplist(&reaplist); |
f7a4d872 | 1395 | release_last_closed_stateid(oo); |
6b180f0b | 1396 | nfs4_put_stateowner(&oo->oo_owner); |
f1d110ca BF |
1397 | } |
1398 | ||
5282fd72 ME |
1399 | static inline int |
1400 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
1401 | { | |
1402 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
1403 | ||
1404 | return sid->sequence % SESSION_HASH_SIZE; | |
1405 | } | |
1406 | ||
135dd002 | 1407 | #ifdef CONFIG_SUNRPC_DEBUG |
5282fd72 ME |
1408 | static inline void |
1409 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
1410 | { | |
1411 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
1412 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
1413 | } | |
8f199b82 TM |
1414 | #else |
1415 | static inline void | |
1416 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
1417 | { | |
1418 | } | |
1419 | #endif | |
1420 | ||
9411b1d4 BF |
1421 | /* |
1422 | * Bump the seqid on cstate->replay_owner, and clear replay_owner if it | |
1423 | * won't be used for replay. | |
1424 | */ | |
1425 | void nfsd4_bump_seqid(struct nfsd4_compound_state *cstate, __be32 nfserr) | |
1426 | { | |
1427 | struct nfs4_stateowner *so = cstate->replay_owner; | |
1428 | ||
1429 | if (nfserr == nfserr_replay_me) | |
1430 | return; | |
1431 | ||
1432 | if (!seqid_mutating_err(ntohl(nfserr))) { | |
58fb12e6 | 1433 | nfsd4_cstate_clear_replay(cstate); |
9411b1d4 BF |
1434 | return; |
1435 | } | |
1436 | if (!so) | |
1437 | return; | |
1438 | if (so->so_is_open_owner) | |
1439 | release_last_closed_stateid(openowner(so)); | |
1440 | so->so_seqid++; | |
1441 | return; | |
1442 | } | |
5282fd72 | 1443 | |
ec6b5d7b AA |
1444 | static void |
1445 | gen_sessionid(struct nfsd4_session *ses) | |
1446 | { | |
1447 | struct nfs4_client *clp = ses->se_client; | |
1448 | struct nfsd4_sessionid *sid; | |
1449 | ||
1450 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
1451 | sid->clientid = clp->cl_clientid; | |
1452 | sid->sequence = current_sessionid++; | |
1453 | sid->reserved = 0; | |
1454 | } | |
1455 | ||
1456 | /* | |
a649637c AA |
1457 | * The protocol defines ca_maxresponssize_cached to include the size of |
1458 | * the rpc header, but all we need to cache is the data starting after | |
1459 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
1460 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
1461 | * value that is the number of bytes in our cache plus a few additional | |
1462 | * bytes. In order to stay on the safe side, and not promise more than | |
1463 | * we can cache, those additional bytes must be the minimum possible: 24 | |
1464 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
1465 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
1466 | * for the SEQUENCE op response: | |
1467 | */ | |
1468 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
1469 | ||
557ce264 AA |
1470 | static void |
1471 | free_session_slots(struct nfsd4_session *ses) | |
1472 | { | |
1473 | int i; | |
1474 | ||
ff371bc8 BF |
1475 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) { |
1476 | free_svc_cred(&ses->se_slots[i]->sl_cred); | |
557ce264 | 1477 | kfree(ses->se_slots[i]); |
ff371bc8 | 1478 | } |
557ce264 AA |
1479 | } |
1480 | ||
a649637c | 1481 | /* |
efe0cb6d BF |
1482 | * We don't actually need to cache the rpc and session headers, so we |
1483 | * can allocate a little less for each slot: | |
1484 | */ | |
55c760cf | 1485 | static inline u32 slot_bytes(struct nfsd4_channel_attrs *ca) |
efe0cb6d | 1486 | { |
55c760cf | 1487 | u32 size; |
efe0cb6d | 1488 | |
55c760cf BF |
1489 | if (ca->maxresp_cached < NFSD_MIN_HDR_SEQ_SZ) |
1490 | size = 0; | |
1491 | else | |
1492 | size = ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
1493 | return size + sizeof(struct nfsd4_slot); | |
5b6feee9 | 1494 | } |
ec6b5d7b | 1495 | |
5b6feee9 BF |
1496 | /* |
1497 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c | 1498 | * re-negotiate active sessions and reduce their slot usage to make |
42b2aa86 | 1499 | * room for new connections. For now we just fail the create session. |
ec6b5d7b | 1500 | */ |
55c760cf | 1501 | static u32 nfsd4_get_drc_mem(struct nfsd4_channel_attrs *ca) |
ec6b5d7b | 1502 | { |
55c760cf BF |
1503 | u32 slotsize = slot_bytes(ca); |
1504 | u32 num = ca->maxreqs; | |
5b6feee9 | 1505 | int avail; |
ec6b5d7b | 1506 | |
5b6feee9 | 1507 | spin_lock(&nfsd_drc_lock); |
697ce9be ZY |
1508 | avail = min((unsigned long)NFSD_MAX_MEM_PER_SESSION, |
1509 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
5b6feee9 BF |
1510 | num = min_t(int, num, avail / slotsize); |
1511 | nfsd_drc_mem_used += num * slotsize; | |
1512 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 1513 | |
5b6feee9 BF |
1514 | return num; |
1515 | } | |
ec6b5d7b | 1516 | |
55c760cf | 1517 | static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs *ca) |
5b6feee9 | 1518 | { |
55c760cf BF |
1519 | int slotsize = slot_bytes(ca); |
1520 | ||
4bd9b0f4 | 1521 | spin_lock(&nfsd_drc_lock); |
55c760cf | 1522 | nfsd_drc_mem_used -= slotsize * ca->maxreqs; |
4bd9b0f4 | 1523 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 1524 | } |
ec6b5d7b | 1525 | |
60810e54 KM |
1526 | static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fattrs, |
1527 | struct nfsd4_channel_attrs *battrs) | |
5b6feee9 | 1528 | { |
60810e54 KM |
1529 | int numslots = fattrs->maxreqs; |
1530 | int slotsize = slot_bytes(fattrs); | |
5b6feee9 BF |
1531 | struct nfsd4_session *new; |
1532 | int mem, i; | |
a649637c | 1533 | |
5b6feee9 BF |
1534 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
1535 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
1536 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 1537 | |
5b6feee9 BF |
1538 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
1539 | if (!new) | |
1540 | return NULL; | |
557ce264 | 1541 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 | 1542 | for (i = 0; i < numslots; i++) { |
55c760cf | 1543 | new->se_slots[i] = kzalloc(slotsize, GFP_KERNEL); |
5b6feee9 | 1544 | if (!new->se_slots[i]) |
557ce264 | 1545 | goto out_free; |
557ce264 | 1546 | } |
60810e54 KM |
1547 | |
1548 | memcpy(&new->se_fchannel, fattrs, sizeof(struct nfsd4_channel_attrs)); | |
1549 | memcpy(&new->se_bchannel, battrs, sizeof(struct nfsd4_channel_attrs)); | |
1550 | ||
5b6feee9 BF |
1551 | return new; |
1552 | out_free: | |
1553 | while (i--) | |
1554 | kfree(new->se_slots[i]); | |
1555 | kfree(new); | |
1556 | return NULL; | |
ec6b5d7b AA |
1557 | } |
1558 | ||
19cf5c02 BF |
1559 | static void free_conn(struct nfsd4_conn *c) |
1560 | { | |
1561 | svc_xprt_put(c->cn_xprt); | |
1562 | kfree(c); | |
1563 | } | |
ec6b5d7b | 1564 | |
19cf5c02 BF |
1565 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
1566 | { | |
1567 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
1568 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 1569 | |
19cf5c02 BF |
1570 | spin_lock(&clp->cl_lock); |
1571 | if (!list_empty(&c->cn_persession)) { | |
1572 | list_del(&c->cn_persession); | |
1573 | free_conn(c); | |
1574 | } | |
eea49806 | 1575 | nfsd4_probe_callback(clp); |
2e4b7239 | 1576 | spin_unlock(&clp->cl_lock); |
19cf5c02 | 1577 | } |
ec6b5d7b | 1578 | |
d29c374c | 1579 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 1580 | { |
c7662518 | 1581 | struct nfsd4_conn *conn; |
ec6b5d7b | 1582 | |
c7662518 BF |
1583 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
1584 | if (!conn) | |
db90681d | 1585 | return NULL; |
c7662518 BF |
1586 | svc_xprt_get(rqstp->rq_xprt); |
1587 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 1588 | conn->cn_flags = flags; |
db90681d BF |
1589 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
1590 | return conn; | |
1591 | } | |
a649637c | 1592 | |
328ead28 BF |
1593 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
1594 | { | |
1595 | conn->cn_session = ses; | |
1596 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
1597 | } |
1598 | ||
db90681d | 1599 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 1600 | { |
db90681d | 1601 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 1602 | |
c7662518 | 1603 | spin_lock(&clp->cl_lock); |
328ead28 | 1604 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 1605 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
1606 | } |
1607 | ||
21b75b01 | 1608 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 1609 | { |
19cf5c02 | 1610 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 1611 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
1612 | } |
1613 | ||
e1ff371f | 1614 | static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses) |
ec6b5d7b | 1615 | { |
21b75b01 | 1616 | int ret; |
ec6b5d7b | 1617 | |
db90681d | 1618 | nfsd4_hash_conn(conn, ses); |
21b75b01 BF |
1619 | ret = nfsd4_register_conn(conn); |
1620 | if (ret) | |
1621 | /* oops; xprt is already down: */ | |
1622 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
57a37144 BF |
1623 | /* We may have gained or lost a callback channel: */ |
1624 | nfsd4_probe_callback_sync(ses->se_client); | |
c7662518 | 1625 | } |
ec6b5d7b | 1626 | |
e1ff371f | 1627 | static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses) |
1d1bc8f2 BF |
1628 | { |
1629 | u32 dir = NFS4_CDFC4_FORE; | |
1630 | ||
e1ff371f | 1631 | if (cses->flags & SESSION4_BACK_CHAN) |
1d1bc8f2 | 1632 | dir |= NFS4_CDFC4_BACK; |
e1ff371f | 1633 | return alloc_conn(rqstp, dir); |
1d1bc8f2 BF |
1634 | } |
1635 | ||
1636 | /* must be called under client_lock */ | |
19cf5c02 | 1637 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 1638 | { |
19cf5c02 BF |
1639 | struct nfs4_client *clp = s->se_client; |
1640 | struct nfsd4_conn *c; | |
ec6b5d7b | 1641 | |
19cf5c02 BF |
1642 | spin_lock(&clp->cl_lock); |
1643 | while (!list_empty(&s->se_conns)) { | |
1644 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
1645 | list_del_init(&c->cn_persession); | |
1646 | spin_unlock(&clp->cl_lock); | |
557ce264 | 1647 | |
19cf5c02 BF |
1648 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
1649 | free_conn(c); | |
ec6b5d7b | 1650 | |
19cf5c02 BF |
1651 | spin_lock(&clp->cl_lock); |
1652 | } | |
1653 | spin_unlock(&clp->cl_lock); | |
c7662518 | 1654 | } |
ec6b5d7b | 1655 | |
1377b69e BF |
1656 | static void __free_session(struct nfsd4_session *ses) |
1657 | { | |
1377b69e BF |
1658 | free_session_slots(ses); |
1659 | kfree(ses); | |
1660 | } | |
1661 | ||
66b2b9b2 | 1662 | static void free_session(struct nfsd4_session *ses) |
c7662518 | 1663 | { |
19cf5c02 | 1664 | nfsd4_del_conns(ses); |
55c760cf | 1665 | nfsd4_put_drc_mem(&ses->se_fchannel); |
1377b69e | 1666 | __free_session(ses); |
c7662518 BF |
1667 | } |
1668 | ||
135ae827 | 1669 | static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
a827bcb2 | 1670 | { |
a827bcb2 | 1671 | int idx; |
1872de0e | 1672 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
a827bcb2 | 1673 | |
ec6b5d7b AA |
1674 | new->se_client = clp; |
1675 | gen_sessionid(new); | |
ec6b5d7b | 1676 | |
c7662518 BF |
1677 | INIT_LIST_HEAD(&new->se_conns); |
1678 | ||
ac7c46f2 | 1679 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 1680 | new->se_flags = cses->flags; |
8b5ce5cd | 1681 | new->se_cb_prog = cses->callback_prog; |
c6bb3ca2 | 1682 | new->se_cb_sec = cses->cb_sec; |
66b2b9b2 | 1683 | atomic_set(&new->se_ref, 0); |
5b6feee9 | 1684 | idx = hash_sessionid(&new->se_sessionid); |
1872de0e | 1685 | list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]); |
4c649378 | 1686 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 1687 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 1688 | spin_unlock(&clp->cl_lock); |
60810e54 | 1689 | |
b0d2e42c | 1690 | { |
edd76786 | 1691 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
1692 | /* |
1693 | * This is a little silly; with sessions there's no real | |
1694 | * use for the callback address. Use the peer address | |
1695 | * as a reasonable default for now, but consider fixing | |
1696 | * the rpc client not to require an address in the | |
1697 | * future: | |
1698 | */ | |
edd76786 BF |
1699 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
1700 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 1701 | } |
ec6b5d7b AA |
1702 | } |
1703 | ||
9089f1b4 | 1704 | /* caller must hold client_lock */ |
5282fd72 | 1705 | static struct nfsd4_session * |
d4e19e70 | 1706 | __find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net) |
5282fd72 ME |
1707 | { |
1708 | struct nfsd4_session *elem; | |
1709 | int idx; | |
1872de0e | 1710 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
5282fd72 | 1711 | |
0a880a28 TM |
1712 | lockdep_assert_held(&nn->client_lock); |
1713 | ||
5282fd72 ME |
1714 | dump_sessionid(__func__, sessionid); |
1715 | idx = hash_sessionid(sessionid); | |
5282fd72 | 1716 | /* Search in the appropriate list */ |
1872de0e | 1717 | list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) { |
5282fd72 ME |
1718 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
1719 | NFS4_MAX_SESSIONID_LEN)) { | |
1720 | return elem; | |
1721 | } | |
1722 | } | |
1723 | ||
1724 | dprintk("%s: session not found\n", __func__); | |
1725 | return NULL; | |
1726 | } | |
1727 | ||
d4e19e70 TM |
1728 | static struct nfsd4_session * |
1729 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net, | |
1730 | __be32 *ret) | |
1731 | { | |
1732 | struct nfsd4_session *session; | |
1733 | __be32 status = nfserr_badsession; | |
1734 | ||
1735 | session = __find_in_sessionid_hashtbl(sessionid, net); | |
1736 | if (!session) | |
1737 | goto out; | |
1738 | status = nfsd4_get_session_locked(session); | |
1739 | if (status) | |
1740 | session = NULL; | |
1741 | out: | |
1742 | *ret = status; | |
1743 | return session; | |
1744 | } | |
1745 | ||
9089f1b4 | 1746 | /* caller must hold client_lock */ |
7116ed6b | 1747 | static void |
5282fd72 | 1748 | unhash_session(struct nfsd4_session *ses) |
7116ed6b | 1749 | { |
0a880a28 TM |
1750 | struct nfs4_client *clp = ses->se_client; |
1751 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
1752 | ||
1753 | lockdep_assert_held(&nn->client_lock); | |
1754 | ||
7116ed6b | 1755 | list_del(&ses->se_hash); |
4c649378 | 1756 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 1757 | list_del(&ses->se_perclnt); |
4c649378 | 1758 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
1759 | } |
1760 | ||
1da177e4 LT |
1761 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
1762 | static int | |
2c142baa | 1763 | STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn) |
1da177e4 | 1764 | { |
bbc7f33a BF |
1765 | /* |
1766 | * We're assuming the clid was not given out from a boot | |
1767 | * precisely 2^32 (about 136 years) before this one. That seems | |
1768 | * a safe assumption: | |
1769 | */ | |
1770 | if (clid->cl_boot == (u32)nn->boot_time) | |
1da177e4 | 1771 | return 0; |
60adfc50 | 1772 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
2c142baa | 1773 | clid->cl_boot, clid->cl_id, nn->boot_time); |
1da177e4 LT |
1774 | return 1; |
1775 | } | |
1776 | ||
1777 | /* | |
1778 | * XXX Should we use a slab cache ? | |
1779 | * This type of memory management is somewhat inefficient, but we use it | |
1780 | * anyway since SETCLIENTID is not a common operation. | |
1781 | */ | |
35bba9a3 | 1782 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
1783 | { |
1784 | struct nfs4_client *clp; | |
d4f0489f | 1785 | int i; |
1da177e4 | 1786 | |
35bba9a3 BF |
1787 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
1788 | if (clp == NULL) | |
1789 | return NULL; | |
67114fe6 | 1790 | clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); |
d4f0489f TM |
1791 | if (clp->cl_name.data == NULL) |
1792 | goto err_no_name; | |
1793 | clp->cl_ownerstr_hashtbl = kmalloc(sizeof(struct list_head) * | |
1794 | OWNER_HASH_SIZE, GFP_KERNEL); | |
1795 | if (!clp->cl_ownerstr_hashtbl) | |
1796 | goto err_no_hashtbl; | |
1797 | for (i = 0; i < OWNER_HASH_SIZE; i++) | |
1798 | INIT_LIST_HEAD(&clp->cl_ownerstr_hashtbl[i]); | |
35bba9a3 | 1799 | clp->cl_name.len = name.len; |
5694c93e TM |
1800 | INIT_LIST_HEAD(&clp->cl_sessions); |
1801 | idr_init(&clp->cl_stateids); | |
1802 | atomic_set(&clp->cl_refcount, 0); | |
1803 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; | |
1804 | INIT_LIST_HEAD(&clp->cl_idhash); | |
1805 | INIT_LIST_HEAD(&clp->cl_openowners); | |
1806 | INIT_LIST_HEAD(&clp->cl_delegations); | |
1807 | INIT_LIST_HEAD(&clp->cl_lru); | |
5694c93e | 1808 | INIT_LIST_HEAD(&clp->cl_revoked); |
9cf514cc CH |
1809 | #ifdef CONFIG_NFSD_PNFS |
1810 | INIT_LIST_HEAD(&clp->cl_lo_states); | |
1811 | #endif | |
5694c93e TM |
1812 | spin_lock_init(&clp->cl_lock); |
1813 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1da177e4 | 1814 | return clp; |
d4f0489f TM |
1815 | err_no_hashtbl: |
1816 | kfree(clp->cl_name.data); | |
1817 | err_no_name: | |
1818 | kfree(clp); | |
1819 | return NULL; | |
1da177e4 LT |
1820 | } |
1821 | ||
4dd86e15 | 1822 | static void |
1da177e4 LT |
1823 | free_client(struct nfs4_client *clp) |
1824 | { | |
792c95dd BF |
1825 | while (!list_empty(&clp->cl_sessions)) { |
1826 | struct nfsd4_session *ses; | |
1827 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
1828 | se_perclnt); | |
1829 | list_del(&ses->se_perclnt); | |
66b2b9b2 BF |
1830 | WARN_ON_ONCE(atomic_read(&ses->se_ref)); |
1831 | free_session(ses); | |
792c95dd | 1832 | } |
4cb57e30 | 1833 | rpc_destroy_wait_queue(&clp->cl_cb_waitq); |
03a4e1f6 | 1834 | free_svc_cred(&clp->cl_cred); |
d4f0489f | 1835 | kfree(clp->cl_ownerstr_hashtbl); |
1da177e4 | 1836 | kfree(clp->cl_name.data); |
2d32b29a | 1837 | idr_destroy(&clp->cl_stateids); |
1da177e4 LT |
1838 | kfree(clp); |
1839 | } | |
1840 | ||
84d38ac9 | 1841 | /* must be called under the client_lock */ |
4beb345b | 1842 | static void |
84d38ac9 BH |
1843 | unhash_client_locked(struct nfs4_client *clp) |
1844 | { | |
4beb345b | 1845 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
792c95dd BF |
1846 | struct nfsd4_session *ses; |
1847 | ||
0a880a28 TM |
1848 | lockdep_assert_held(&nn->client_lock); |
1849 | ||
4beb345b TM |
1850 | /* Mark the client as expired! */ |
1851 | clp->cl_time = 0; | |
1852 | /* Make it invisible */ | |
1853 | if (!list_empty(&clp->cl_idhash)) { | |
1854 | list_del_init(&clp->cl_idhash); | |
1855 | if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) | |
1856 | rb_erase(&clp->cl_namenode, &nn->conf_name_tree); | |
1857 | else | |
1858 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); | |
1859 | } | |
1860 | list_del_init(&clp->cl_lru); | |
4c649378 | 1861 | spin_lock(&clp->cl_lock); |
792c95dd BF |
1862 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
1863 | list_del_init(&ses->se_hash); | |
4c649378 | 1864 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
1865 | } |
1866 | ||
1da177e4 | 1867 | static void |
4beb345b TM |
1868 | unhash_client(struct nfs4_client *clp) |
1869 | { | |
1870 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
1871 | ||
1872 | spin_lock(&nn->client_lock); | |
1873 | unhash_client_locked(clp); | |
1874 | spin_unlock(&nn->client_lock); | |
1875 | } | |
1876 | ||
97403d95 JL |
1877 | static __be32 mark_client_expired_locked(struct nfs4_client *clp) |
1878 | { | |
1879 | if (atomic_read(&clp->cl_refcount)) | |
1880 | return nfserr_jukebox; | |
1881 | unhash_client_locked(clp); | |
1882 | return nfs_ok; | |
1883 | } | |
1884 | ||
4beb345b TM |
1885 | static void |
1886 | __destroy_client(struct nfs4_client *clp) | |
1da177e4 | 1887 | { |
797bfd05 | 1888 | int i; |
fe0750e5 | 1889 | struct nfs4_openowner *oo; |
1da177e4 | 1890 | struct nfs4_delegation *dp; |
1da177e4 LT |
1891 | struct list_head reaplist; |
1892 | ||
1da177e4 | 1893 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 1894 | spin_lock(&state_lock); |
ea1da636 N |
1895 | while (!list_empty(&clp->cl_delegations)) { |
1896 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
3fcbbd24 | 1897 | WARN_ON(!unhash_delegation_locked(dp)); |
42690676 | 1898 | list_add(&dp->dl_recall_lru, &reaplist); |
1da177e4 | 1899 | } |
cdc97505 | 1900 | spin_unlock(&state_lock); |
1da177e4 LT |
1901 | while (!list_empty(&reaplist)) { |
1902 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
42690676 | 1903 | list_del_init(&dp->dl_recall_lru); |
8287f009 | 1904 | put_clnt_odstate(dp->dl_clnt_odstate); |
afbda402 | 1905 | nfs4_put_deleg_lease(dp->dl_stid.sc_file); |
6011695d | 1906 | nfs4_put_stid(&dp->dl_stid); |
1da177e4 | 1907 | } |
2d4a532d | 1908 | while (!list_empty(&clp->cl_revoked)) { |
c876486b | 1909 | dp = list_entry(clp->cl_revoked.next, struct nfs4_delegation, dl_recall_lru); |
2d4a532d | 1910 | list_del_init(&dp->dl_recall_lru); |
6011695d | 1911 | nfs4_put_stid(&dp->dl_stid); |
956c4fee | 1912 | } |
ea1da636 | 1913 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 | 1914 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
b5971afa | 1915 | nfs4_get_stateowner(&oo->oo_owner); |
fe0750e5 | 1916 | release_openowner(oo); |
1da177e4 | 1917 | } |
797bfd05 JL |
1918 | for (i = 0; i < OWNER_HASH_SIZE; i++) { |
1919 | struct nfs4_stateowner *so, *tmp; | |
1920 | ||
1921 | list_for_each_entry_safe(so, tmp, &clp->cl_ownerstr_hashtbl[i], | |
1922 | so_strhash) { | |
1923 | /* Should be no openowners at this point */ | |
1924 | WARN_ON_ONCE(so->so_is_open_owner); | |
1925 | remove_blocked_locks(lockowner(so)); | |
1926 | } | |
1927 | } | |
9cf514cc | 1928 | nfsd4_return_all_client_layouts(clp); |
6ff8da08 | 1929 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
1930 | if (clp->cl_cb_conn.cb_xprt) |
1931 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
221a6876 | 1932 | free_client(clp); |
1da177e4 LT |
1933 | } |
1934 | ||
4beb345b TM |
1935 | static void |
1936 | destroy_client(struct nfs4_client *clp) | |
1937 | { | |
1938 | unhash_client(clp); | |
1939 | __destroy_client(clp); | |
1940 | } | |
1941 | ||
0d22f68f BF |
1942 | static void expire_client(struct nfs4_client *clp) |
1943 | { | |
4beb345b | 1944 | unhash_client(clp); |
0d22f68f | 1945 | nfsd4_client_record_remove(clp); |
4beb345b | 1946 | __destroy_client(clp); |
0d22f68f BF |
1947 | } |
1948 | ||
35bba9a3 BF |
1949 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
1950 | { | |
1951 | memcpy(target->cl_verifier.data, source->data, | |
1952 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
1953 | } |
1954 | ||
35bba9a3 BF |
1955 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
1956 | { | |
1da177e4 LT |
1957 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
1958 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
1959 | } | |
1960 | ||
50043859 BF |
1961 | static int copy_cred(struct svc_cred *target, struct svc_cred *source) |
1962 | { | |
2f10fdcb N |
1963 | target->cr_principal = kstrdup(source->cr_principal, GFP_KERNEL); |
1964 | target->cr_raw_principal = kstrdup(source->cr_raw_principal, | |
1965 | GFP_KERNEL); | |
1966 | if ((source->cr_principal && ! target->cr_principal) || | |
1967 | (source->cr_raw_principal && ! target->cr_raw_principal)) | |
1968 | return -ENOMEM; | |
50043859 | 1969 | |
d5497fc6 | 1970 | target->cr_flavor = source->cr_flavor; |
1da177e4 LT |
1971 | target->cr_uid = source->cr_uid; |
1972 | target->cr_gid = source->cr_gid; | |
1973 | target->cr_group_info = source->cr_group_info; | |
1974 | get_group_info(target->cr_group_info); | |
0dc1531a BF |
1975 | target->cr_gss_mech = source->cr_gss_mech; |
1976 | if (source->cr_gss_mech) | |
1977 | gss_mech_get(source->cr_gss_mech); | |
03a4e1f6 | 1978 | return 0; |
1da177e4 LT |
1979 | } |
1980 | ||
ef17af2a | 1981 | static int |
ac55fdc4 JL |
1982 | compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2) |
1983 | { | |
ef17af2a RV |
1984 | if (o1->len < o2->len) |
1985 | return -1; | |
1986 | if (o1->len > o2->len) | |
1987 | return 1; | |
1988 | return memcmp(o1->data, o2->data, o1->len); | |
ac55fdc4 JL |
1989 | } |
1990 | ||
35bba9a3 | 1991 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 1992 | { |
a55370a3 | 1993 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
1994 | } |
1995 | ||
1996 | static int | |
599e0a22 BF |
1997 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1998 | { | |
1999 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
2000 | } |
2001 | ||
2002 | static int | |
599e0a22 BF |
2003 | same_clid(clientid_t *cl1, clientid_t *cl2) |
2004 | { | |
2005 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
2006 | } |
2007 | ||
8fbba96e BF |
2008 | static bool groups_equal(struct group_info *g1, struct group_info *g2) |
2009 | { | |
2010 | int i; | |
2011 | ||
2012 | if (g1->ngroups != g2->ngroups) | |
2013 | return false; | |
2014 | for (i=0; i<g1->ngroups; i++) | |
81243eac | 2015 | if (!gid_eq(g1->gid[i], g2->gid[i])) |
8fbba96e BF |
2016 | return false; |
2017 | return true; | |
2018 | } | |
2019 | ||
68eb3508 BF |
2020 | /* |
2021 | * RFC 3530 language requires clid_inuse be returned when the | |
2022 | * "principal" associated with a requests differs from that previously | |
2023 | * used. We use uid, gid's, and gss principal string as our best | |
2024 | * approximation. We also don't want to allow non-gss use of a client | |
2025 | * established using gss: in theory cr_principal should catch that | |
2026 | * change, but in practice cr_principal can be null even in the gss case | |
2027 | * since gssd doesn't always pass down a principal string. | |
2028 | */ | |
2029 | static bool is_gss_cred(struct svc_cred *cr) | |
2030 | { | |
2031 | /* Is cr_flavor one of the gss "pseudoflavors"?: */ | |
2032 | return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR); | |
2033 | } | |
2034 | ||
2035 | ||
5559b50a | 2036 | static bool |
599e0a22 BF |
2037 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
2038 | { | |
68eb3508 | 2039 | if ((is_gss_cred(cr1) != is_gss_cred(cr2)) |
6fab8779 EB |
2040 | || (!uid_eq(cr1->cr_uid, cr2->cr_uid)) |
2041 | || (!gid_eq(cr1->cr_gid, cr2->cr_gid)) | |
8fbba96e BF |
2042 | || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) |
2043 | return false; | |
2044 | if (cr1->cr_principal == cr2->cr_principal) | |
2045 | return true; | |
2046 | if (!cr1->cr_principal || !cr2->cr_principal) | |
2047 | return false; | |
5559b50a | 2048 | return 0 == strcmp(cr1->cr_principal, cr2->cr_principal); |
1da177e4 LT |
2049 | } |
2050 | ||
57266a6e BF |
2051 | static bool svc_rqst_integrity_protected(struct svc_rqst *rqstp) |
2052 | { | |
2053 | struct svc_cred *cr = &rqstp->rq_cred; | |
2054 | u32 service; | |
2055 | ||
c4720591 BF |
2056 | if (!cr->cr_gss_mech) |
2057 | return false; | |
57266a6e BF |
2058 | service = gss_pseudoflavor_to_service(cr->cr_gss_mech, cr->cr_flavor); |
2059 | return service == RPC_GSS_SVC_INTEGRITY || | |
2060 | service == RPC_GSS_SVC_PRIVACY; | |
2061 | } | |
2062 | ||
dedeb13f | 2063 | bool nfsd4_mach_creds_match(struct nfs4_client *cl, struct svc_rqst *rqstp) |
57266a6e BF |
2064 | { |
2065 | struct svc_cred *cr = &rqstp->rq_cred; | |
2066 | ||
2067 | if (!cl->cl_mach_cred) | |
2068 | return true; | |
2069 | if (cl->cl_cred.cr_gss_mech != cr->cr_gss_mech) | |
2070 | return false; | |
2071 | if (!svc_rqst_integrity_protected(rqstp)) | |
2072 | return false; | |
414ca017 BF |
2073 | if (cl->cl_cred.cr_raw_principal) |
2074 | return 0 == strcmp(cl->cl_cred.cr_raw_principal, | |
2075 | cr->cr_raw_principal); | |
57266a6e BF |
2076 | if (!cr->cr_principal) |
2077 | return false; | |
2078 | return 0 == strcmp(cl->cl_cred.cr_principal, cr->cr_principal); | |
2079 | } | |
2080 | ||
294ac32e | 2081 | static void gen_confirm(struct nfs4_client *clp, struct nfsd_net *nn) |
deda2faa | 2082 | { |
ab4684d1 | 2083 | __be32 verf[2]; |
1da177e4 | 2084 | |
f419992c JL |
2085 | /* |
2086 | * This is opaque to client, so no need to byte-swap. Use | |
2087 | * __force to keep sparse happy | |
2088 | */ | |
2089 | verf[0] = (__force __be32)get_seconds(); | |
19311aa8 | 2090 | verf[1] = (__force __be32)nn->clverifier_counter++; |
ab4684d1 | 2091 | memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); |
1da177e4 LT |
2092 | } |
2093 | ||
294ac32e JL |
2094 | static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn) |
2095 | { | |
2096 | clp->cl_clientid.cl_boot = nn->boot_time; | |
2097 | clp->cl_clientid.cl_id = nn->clientid_counter++; | |
2098 | gen_confirm(clp, nn); | |
2099 | } | |
2100 | ||
4770d722 JL |
2101 | static struct nfs4_stid * |
2102 | find_stateid_locked(struct nfs4_client *cl, stateid_t *t) | |
4581d140 | 2103 | { |
3abdb607 BF |
2104 | struct nfs4_stid *ret; |
2105 | ||
2106 | ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id); | |
2107 | if (!ret || !ret->sc_type) | |
2108 | return NULL; | |
2109 | return ret; | |
4d71ab87 BF |
2110 | } |
2111 | ||
4770d722 JL |
2112 | static struct nfs4_stid * |
2113 | find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) | |
f459e453 BF |
2114 | { |
2115 | struct nfs4_stid *s; | |
4d71ab87 | 2116 | |
4770d722 JL |
2117 | spin_lock(&cl->cl_lock); |
2118 | s = find_stateid_locked(cl, t); | |
2d3f9668 TM |
2119 | if (s != NULL) { |
2120 | if (typemask & s->sc_type) | |
2121 | atomic_inc(&s->sc_count); | |
2122 | else | |
2123 | s = NULL; | |
2124 | } | |
4770d722 JL |
2125 | spin_unlock(&cl->cl_lock); |
2126 | return s; | |
4581d140 BF |
2127 | } |
2128 | ||
2216d449 | 2129 | static struct nfs4_client *create_client(struct xdr_netobj name, |
b09333c4 RL |
2130 | struct svc_rqst *rqstp, nfs4_verifier *verf) |
2131 | { | |
2132 | struct nfs4_client *clp; | |
2133 | struct sockaddr *sa = svc_addr(rqstp); | |
03a4e1f6 | 2134 | int ret; |
c212cecf | 2135 | struct net *net = SVC_NET(rqstp); |
b09333c4 RL |
2136 | |
2137 | clp = alloc_client(name); | |
2138 | if (clp == NULL) | |
2139 | return NULL; | |
2140 | ||
03a4e1f6 BF |
2141 | ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); |
2142 | if (ret) { | |
03a4e1f6 | 2143 | free_client(clp); |
03a4e1f6 | 2144 | return NULL; |
b09333c4 | 2145 | } |
0162ac2b | 2146 | nfsd4_init_cb(&clp->cl_cb_null, clp, NULL, NFSPROC4_CLNT_CB_NULL); |
07cd4909 | 2147 | clp->cl_time = get_seconds(); |
b09333c4 | 2148 | clear_bit(0, &clp->cl_cb_slot_busy); |
b09333c4 RL |
2149 | copy_verf(clp, verf); |
2150 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
edd76786 | 2151 | clp->cl_cb_session = NULL; |
c212cecf | 2152 | clp->net = net; |
b09333c4 RL |
2153 | return clp; |
2154 | } | |
2155 | ||
fd39ca9a | 2156 | static void |
ac55fdc4 JL |
2157 | add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root) |
2158 | { | |
2159 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
2160 | struct nfs4_client *clp; | |
2161 | ||
2162 | while (*new) { | |
2163 | clp = rb_entry(*new, struct nfs4_client, cl_namenode); | |
2164 | parent = *new; | |
2165 | ||
2166 | if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0) | |
2167 | new = &((*new)->rb_left); | |
2168 | else | |
2169 | new = &((*new)->rb_right); | |
2170 | } | |
2171 | ||
2172 | rb_link_node(&new_clp->cl_namenode, parent, new); | |
2173 | rb_insert_color(&new_clp->cl_namenode, root); | |
2174 | } | |
2175 | ||
2176 | static struct nfs4_client * | |
2177 | find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root) | |
2178 | { | |
ef17af2a | 2179 | int cmp; |
ac55fdc4 JL |
2180 | struct rb_node *node = root->rb_node; |
2181 | struct nfs4_client *clp; | |
2182 | ||
2183 | while (node) { | |
2184 | clp = rb_entry(node, struct nfs4_client, cl_namenode); | |
2185 | cmp = compare_blob(&clp->cl_name, name); | |
2186 | if (cmp > 0) | |
2187 | node = node->rb_left; | |
2188 | else if (cmp < 0) | |
2189 | node = node->rb_right; | |
2190 | else | |
2191 | return clp; | |
2192 | } | |
2193 | return NULL; | |
2194 | } | |
2195 | ||
2196 | static void | |
2197 | add_to_unconfirmed(struct nfs4_client *clp) | |
1da177e4 LT |
2198 | { |
2199 | unsigned int idhashval; | |
0a7ec377 | 2200 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 2201 | |
0a880a28 TM |
2202 | lockdep_assert_held(&nn->client_lock); |
2203 | ||
ac55fdc4 | 2204 | clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
a99454aa | 2205 | add_clp_to_name_tree(clp, &nn->unconf_name_tree); |
1da177e4 | 2206 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
0a7ec377 | 2207 | list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]); |
3dbacee6 | 2208 | renew_client_locked(clp); |
1da177e4 LT |
2209 | } |
2210 | ||
fd39ca9a | 2211 | static void |
1da177e4 LT |
2212 | move_to_confirmed(struct nfs4_client *clp) |
2213 | { | |
2214 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
8daae4dc | 2215 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 2216 | |
0a880a28 TM |
2217 | lockdep_assert_held(&nn->client_lock); |
2218 | ||
1da177e4 | 2219 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); |
8daae4dc | 2220 | list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]); |
a99454aa | 2221 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
382a62e7 | 2222 | add_clp_to_name_tree(clp, &nn->conf_name_tree); |
ac55fdc4 | 2223 | set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
3dbacee6 | 2224 | renew_client_locked(clp); |
1da177e4 LT |
2225 | } |
2226 | ||
2227 | static struct nfs4_client * | |
bfa85e83 | 2228 | find_client_in_id_table(struct list_head *tbl, clientid_t *clid, bool sessions) |
1da177e4 LT |
2229 | { |
2230 | struct nfs4_client *clp; | |
2231 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
2232 | ||
bfa85e83 | 2233 | list_for_each_entry(clp, &tbl[idhashval], cl_idhash) { |
a50d2ad1 | 2234 | if (same_clid(&clp->cl_clientid, clid)) { |
d15c077e BF |
2235 | if ((bool)clp->cl_minorversion != sessions) |
2236 | return NULL; | |
3dbacee6 | 2237 | renew_client_locked(clp); |
1da177e4 | 2238 | return clp; |
a50d2ad1 | 2239 | } |
1da177e4 LT |
2240 | } |
2241 | return NULL; | |
2242 | } | |
2243 | ||
bfa85e83 BF |
2244 | static struct nfs4_client * |
2245 | find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) | |
2246 | { | |
2247 | struct list_head *tbl = nn->conf_id_hashtbl; | |
2248 | ||
0a880a28 | 2249 | lockdep_assert_held(&nn->client_lock); |
bfa85e83 BF |
2250 | return find_client_in_id_table(tbl, clid, sessions); |
2251 | } | |
2252 | ||
1da177e4 | 2253 | static struct nfs4_client * |
0a7ec377 | 2254 | find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
1da177e4 | 2255 | { |
bfa85e83 | 2256 | struct list_head *tbl = nn->unconf_id_hashtbl; |
1da177e4 | 2257 | |
0a880a28 | 2258 | lockdep_assert_held(&nn->client_lock); |
bfa85e83 | 2259 | return find_client_in_id_table(tbl, clid, sessions); |
1da177e4 LT |
2260 | } |
2261 | ||
6e5f15c9 | 2262 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 2263 | { |
6e5f15c9 | 2264 | return clp->cl_exchange_flags != 0; |
e203d506 | 2265 | } |
a1bcecd2 | 2266 | |
28ce6054 | 2267 | static struct nfs4_client * |
382a62e7 | 2268 | find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 2269 | { |
0a880a28 | 2270 | lockdep_assert_held(&nn->client_lock); |
382a62e7 | 2271 | return find_clp_in_name_tree(name, &nn->conf_name_tree); |
28ce6054 N |
2272 | } |
2273 | ||
2274 | static struct nfs4_client * | |
a99454aa | 2275 | find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 2276 | { |
0a880a28 | 2277 | lockdep_assert_held(&nn->client_lock); |
a99454aa | 2278 | return find_clp_in_name_tree(name, &nn->unconf_name_tree); |
28ce6054 N |
2279 | } |
2280 | ||
fd39ca9a | 2281 | static void |
6f3d772f | 2282 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 2283 | { |
07263f1e | 2284 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
2285 | struct sockaddr *sa = svc_addr(rqstp); |
2286 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
2287 | unsigned short expected_family; |
2288 | ||
2289 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
2290 | if (se->se_callback_netid_len == 3 && | |
2291 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
2292 | expected_family = AF_INET; | |
2293 | else if (se->se_callback_netid_len == 4 && | |
2294 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
2295 | expected_family = AF_INET6; | |
2296 | else | |
1da177e4 LT |
2297 | goto out_err; |
2298 | ||
c212cecf | 2299 | conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val, |
aa9a4ec7 | 2300 | se->se_callback_addr_len, |
07263f1e BF |
2301 | (struct sockaddr *)&conn->cb_addr, |
2302 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 2303 | |
07263f1e | 2304 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 2305 | goto out_err; |
aa9a4ec7 | 2306 | |
07263f1e BF |
2307 | if (conn->cb_addr.ss_family == AF_INET6) |
2308 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 2309 | |
07263f1e BF |
2310 | conn->cb_prog = se->se_callback_prog; |
2311 | conn->cb_ident = se->se_callback_ident; | |
849a1cf1 | 2312 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
1da177e4 LT |
2313 | return; |
2314 | out_err: | |
07263f1e BF |
2315 | conn->cb_addr.ss_family = AF_UNSPEC; |
2316 | conn->cb_addrlen = 0; | |
4ab495bf | 2317 | dprintk("NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
2318 | "will not receive delegations\n", |
2319 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
2320 | ||
1da177e4 LT |
2321 | return; |
2322 | } | |
2323 | ||
074fe897 | 2324 | /* |
067e1ace | 2325 | * Cache a reply. nfsd4_check_resp_size() has bounded the cache size. |
074fe897 | 2326 | */ |
b607664e | 2327 | static void |
074fe897 | 2328 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) |
074fe897 | 2329 | { |
f5236013 | 2330 | struct xdr_buf *buf = resp->xdr.buf; |
557ce264 AA |
2331 | struct nfsd4_slot *slot = resp->cstate.slot; |
2332 | unsigned int base; | |
074fe897 | 2333 | |
557ce264 | 2334 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 2335 | |
e74cfcb8 | 2336 | slot->sl_flags |= NFSD4_SLOT_INITIALIZED; |
557ce264 AA |
2337 | slot->sl_opcnt = resp->opcnt; |
2338 | slot->sl_status = resp->cstate.status; | |
ff371bc8 BF |
2339 | free_svc_cred(&slot->sl_cred); |
2340 | copy_cred(&slot->sl_cred, &resp->rqstp->rq_cred); | |
074fe897 | 2341 | |
e74cfcb8 BF |
2342 | if (!nfsd4_cache_this(resp)) { |
2343 | slot->sl_flags &= ~NFSD4_SLOT_CACHED; | |
bf864a31 | 2344 | return; |
074fe897 | 2345 | } |
e74cfcb8 BF |
2346 | slot->sl_flags |= NFSD4_SLOT_CACHED; |
2347 | ||
f5236013 BF |
2348 | base = resp->cstate.data_offset; |
2349 | slot->sl_datalen = buf->len - base; | |
2350 | if (read_bytes_from_xdr_buf(buf, base, slot->sl_data, slot->sl_datalen)) | |
d3f03403 DC |
2351 | WARN(1, "%s: sessions DRC could not cache compound\n", |
2352 | __func__); | |
557ce264 | 2353 | return; |
074fe897 AA |
2354 | } |
2355 | ||
2356 | /* | |
abfabf8c AA |
2357 | * Encode the replay sequence operation from the slot values. |
2358 | * If cachethis is FALSE encode the uncached rep error on the next | |
2359 | * operation which sets resp->p and increments resp->opcnt for | |
2360 | * nfs4svc_encode_compoundres. | |
074fe897 | 2361 | * |
074fe897 | 2362 | */ |
abfabf8c AA |
2363 | static __be32 |
2364 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
2365 | struct nfsd4_compoundres *resp) | |
074fe897 | 2366 | { |
abfabf8c AA |
2367 | struct nfsd4_op *op; |
2368 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 2369 | |
abfabf8c AA |
2370 | /* Encode the replayed sequence operation */ |
2371 | op = &args->ops[resp->opcnt - 1]; | |
2372 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 2373 | |
e74cfcb8 BF |
2374 | if (slot->sl_flags & NFSD4_SLOT_CACHED) |
2375 | return op->status; | |
2376 | if (args->opcnt == 1) { | |
2377 | /* | |
2378 | * The original operation wasn't a solo sequence--we | |
2379 | * always cache those--so this retry must not match the | |
2380 | * original: | |
2381 | */ | |
2382 | op->status = nfserr_seq_false_retry; | |
2383 | } else { | |
abfabf8c AA |
2384 | op = &args->ops[resp->opcnt++]; |
2385 | op->status = nfserr_retry_uncached_rep; | |
2386 | nfsd4_encode_operation(resp, op); | |
074fe897 | 2387 | } |
abfabf8c | 2388 | return op->status; |
074fe897 AA |
2389 | } |
2390 | ||
2391 | /* | |
557ce264 AA |
2392 | * The sequence operation is not cached because we can use the slot and |
2393 | * session values. | |
074fe897 | 2394 | */ |
3ca2eb98 | 2395 | static __be32 |
bf864a31 AA |
2396 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
2397 | struct nfsd4_sequence *seq) | |
074fe897 | 2398 | { |
557ce264 | 2399 | struct nfsd4_slot *slot = resp->cstate.slot; |
f5236013 BF |
2400 | struct xdr_stream *xdr = &resp->xdr; |
2401 | __be32 *p; | |
074fe897 AA |
2402 | __be32 status; |
2403 | ||
557ce264 | 2404 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 2405 | |
abfabf8c | 2406 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); |
0da7b19c | 2407 | if (status) |
abfabf8c | 2408 | return status; |
074fe897 | 2409 | |
f5236013 BF |
2410 | p = xdr_reserve_space(xdr, slot->sl_datalen); |
2411 | if (!p) { | |
2412 | WARN_ON_ONCE(1); | |
2413 | return nfserr_serverfault; | |
2414 | } | |
2415 | xdr_encode_opaque_fixed(p, slot->sl_data, slot->sl_datalen); | |
2416 | xdr_commit_encode(xdr); | |
074fe897 | 2417 | |
557ce264 | 2418 | resp->opcnt = slot->sl_opcnt; |
f5236013 | 2419 | return slot->sl_status; |
074fe897 AA |
2420 | } |
2421 | ||
0733d213 AA |
2422 | /* |
2423 | * Set the exchange_id flags returned by the server. | |
2424 | */ | |
2425 | static void | |
2426 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
2427 | { | |
9cf514cc CH |
2428 | #ifdef CONFIG_NFSD_PNFS |
2429 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_PNFS_MDS; | |
2430 | #else | |
0733d213 | 2431 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; |
9cf514cc | 2432 | #endif |
0733d213 AA |
2433 | |
2434 | /* Referrals are supported, Migration is not. */ | |
2435 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
2436 | ||
2437 | /* set the wire flags to return to client. */ | |
2438 | clid->flags = new->cl_exchange_flags; | |
2439 | } | |
2440 | ||
4eaea134 BF |
2441 | static bool client_has_openowners(struct nfs4_client *clp) |
2442 | { | |
2443 | struct nfs4_openowner *oo; | |
2444 | ||
2445 | list_for_each_entry(oo, &clp->cl_openowners, oo_perclient) { | |
2446 | if (!list_empty(&oo->oo_owner.so_stateids)) | |
2447 | return true; | |
2448 | } | |
2449 | return false; | |
2450 | } | |
2451 | ||
631fc9ea BF |
2452 | static bool client_has_state(struct nfs4_client *clp) |
2453 | { | |
4eaea134 | 2454 | return client_has_openowners(clp) |
47e970be KM |
2455 | #ifdef CONFIG_NFSD_PNFS |
2456 | || !list_empty(&clp->cl_lo_states) | |
2457 | #endif | |
6eccece9 BF |
2458 | || !list_empty(&clp->cl_delegations) |
2459 | || !list_empty(&clp->cl_sessions); | |
631fc9ea BF |
2460 | } |
2461 | ||
069b6ad4 | 2462 | __be32 |
eb69853d CH |
2463 | nfsd4_exchange_id(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2464 | union nfsd4_op_u *u) | |
069b6ad4 | 2465 | { |
eb69853d | 2466 | struct nfsd4_exchange_id *exid = &u->exchange_id; |
3dbacee6 TM |
2467 | struct nfs4_client *conf, *new; |
2468 | struct nfs4_client *unconf = NULL; | |
57b7b43b | 2469 | __be32 status; |
363168b4 | 2470 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 2471 | nfs4_verifier verf = exid->verifier; |
363168b4 | 2472 | struct sockaddr *sa = svc_addr(rqstp); |
83e08fd4 | 2473 | bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; |
c212cecf | 2474 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
0733d213 | 2475 | |
363168b4 | 2476 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 2477 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 2478 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 2479 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 2480 | addr_str, exid->flags, exid->spa_how); |
0733d213 | 2481 | |
a084daf5 | 2482 | if (exid->flags & ~EXCHGID4_FLAG_MASK_A) |
0733d213 AA |
2483 | return nfserr_inval; |
2484 | ||
50c7b948 BF |
2485 | new = create_client(exid->clname, rqstp, &verf); |
2486 | if (new == NULL) | |
2487 | return nfserr_jukebox; | |
2488 | ||
0733d213 | 2489 | switch (exid->spa_how) { |
57266a6e | 2490 | case SP4_MACH_CRED: |
ed941643 AE |
2491 | exid->spo_must_enforce[0] = 0; |
2492 | exid->spo_must_enforce[1] = ( | |
2493 | 1 << (OP_BIND_CONN_TO_SESSION - 32) | | |
2494 | 1 << (OP_EXCHANGE_ID - 32) | | |
2495 | 1 << (OP_CREATE_SESSION - 32) | | |
2496 | 1 << (OP_DESTROY_SESSION - 32) | | |
2497 | 1 << (OP_DESTROY_CLIENTID - 32)); | |
2498 | ||
2499 | exid->spo_must_allow[0] &= (1 << (OP_CLOSE) | | |
2500 | 1 << (OP_OPEN_DOWNGRADE) | | |
2501 | 1 << (OP_LOCKU) | | |
2502 | 1 << (OP_DELEGRETURN)); | |
2503 | ||
2504 | exid->spo_must_allow[1] &= ( | |
2505 | 1 << (OP_TEST_STATEID - 32) | | |
2506 | 1 << (OP_FREE_STATEID - 32)); | |
50c7b948 BF |
2507 | if (!svc_rqst_integrity_protected(rqstp)) { |
2508 | status = nfserr_inval; | |
2509 | goto out_nolock; | |
920dd9bb BF |
2510 | } |
2511 | /* | |
2512 | * Sometimes userspace doesn't give us a principal. | |
2513 | * Which is a bug, really. Anyway, we can't enforce | |
2514 | * MACH_CRED in that case, better to give up now: | |
2515 | */ | |
414ca017 BF |
2516 | if (!new->cl_cred.cr_principal && |
2517 | !new->cl_cred.cr_raw_principal) { | |
920dd9bb BF |
2518 | status = nfserr_serverfault; |
2519 | goto out_nolock; | |
50c7b948 BF |
2520 | } |
2521 | new->cl_mach_cred = true; | |
0733d213 AA |
2522 | case SP4_NONE: |
2523 | break; | |
063b0fb9 BF |
2524 | default: /* checked by xdr code */ |
2525 | WARN_ON_ONCE(1); | |
0733d213 | 2526 | case SP4_SSV: |
8edf4b02 KM |
2527 | status = nfserr_encr_alg_unsupp; |
2528 | goto out_nolock; | |
0733d213 AA |
2529 | } |
2530 | ||
2dbb269d | 2531 | /* Cases below refer to rfc 5661 section 18.35.4: */ |
3dbacee6 | 2532 | spin_lock(&nn->client_lock); |
382a62e7 | 2533 | conf = find_confirmed_client_by_name(&exid->clname, nn); |
0733d213 | 2534 | if (conf) { |
83e08fd4 BF |
2535 | bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); |
2536 | bool verfs_match = same_verf(&verf, &conf->cl_verifier); | |
2537 | ||
136e658d BF |
2538 | if (update) { |
2539 | if (!clp_used_exchangeid(conf)) { /* buggy client */ | |
2dbb269d | 2540 | status = nfserr_inval; |
1a308118 BF |
2541 | goto out; |
2542 | } | |
dedeb13f | 2543 | if (!nfsd4_mach_creds_match(conf, rqstp)) { |
57266a6e BF |
2544 | status = nfserr_wrong_cred; |
2545 | goto out; | |
2546 | } | |
136e658d | 2547 | if (!creds_match) { /* case 9 */ |
ea236d07 | 2548 | status = nfserr_perm; |
136e658d BF |
2549 | goto out; |
2550 | } | |
2551 | if (!verfs_match) { /* case 8 */ | |
0733d213 AA |
2552 | status = nfserr_not_same; |
2553 | goto out; | |
2554 | } | |
136e658d BF |
2555 | /* case 6 */ |
2556 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
136e658d | 2557 | goto out_copy; |
0733d213 | 2558 | } |
136e658d | 2559 | if (!creds_match) { /* case 3 */ |
631fc9ea BF |
2560 | if (client_has_state(conf)) { |
2561 | status = nfserr_clid_inuse; | |
0733d213 AA |
2562 | goto out; |
2563 | } | |
0733d213 AA |
2564 | goto out_new; |
2565 | } | |
136e658d | 2566 | if (verfs_match) { /* case 2 */ |
0f1ba0ef | 2567 | conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; |
136e658d BF |
2568 | goto out_copy; |
2569 | } | |
2570 | /* case 5, client reboot */ | |
3dbacee6 | 2571 | conf = NULL; |
136e658d | 2572 | goto out_new; |
6ddbbbfe MS |
2573 | } |
2574 | ||
2dbb269d | 2575 | if (update) { /* case 7 */ |
6ddbbbfe MS |
2576 | status = nfserr_noent; |
2577 | goto out; | |
0733d213 AA |
2578 | } |
2579 | ||
a99454aa | 2580 | unconf = find_unconfirmed_client_by_name(&exid->clname, nn); |
2dbb269d | 2581 | if (unconf) /* case 4, possible retry or client restart */ |
3dbacee6 | 2582 | unhash_client_locked(unconf); |
0733d213 | 2583 | |
2dbb269d | 2584 | /* case 1 (normal case) */ |
0733d213 | 2585 | out_new: |
fd699b8a JL |
2586 | if (conf) { |
2587 | status = mark_client_expired_locked(conf); | |
2588 | if (status) | |
2589 | goto out; | |
2590 | } | |
4f540e29 | 2591 | new->cl_minorversion = cstate->minorversion; |
ed941643 AE |
2592 | new->cl_spo_must_allow.u.words[0] = exid->spo_must_allow[0]; |
2593 | new->cl_spo_must_allow.u.words[1] = exid->spo_must_allow[1]; | |
0733d213 | 2594 | |
c212cecf | 2595 | gen_clid(new, nn); |
ac55fdc4 | 2596 | add_to_unconfirmed(new); |
3dbacee6 | 2597 | swap(new, conf); |
0733d213 | 2598 | out_copy: |
5cc40fd7 TM |
2599 | exid->clientid.cl_boot = conf->cl_clientid.cl_boot; |
2600 | exid->clientid.cl_id = conf->cl_clientid.cl_id; | |
0733d213 | 2601 | |
5cc40fd7 TM |
2602 | exid->seqid = conf->cl_cs_slot.sl_seqid + 1; |
2603 | nfsd4_set_ex_flags(conf, exid); | |
0733d213 AA |
2604 | |
2605 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
5cc40fd7 | 2606 | conf->cl_cs_slot.sl_seqid, conf->cl_exchange_flags); |
0733d213 AA |
2607 | status = nfs_ok; |
2608 | ||
2609 | out: | |
3dbacee6 | 2610 | spin_unlock(&nn->client_lock); |
50c7b948 | 2611 | out_nolock: |
5cc40fd7 | 2612 | if (new) |
3dbacee6 TM |
2613 | expire_client(new); |
2614 | if (unconf) | |
2615 | expire_client(unconf); | |
0733d213 | 2616 | return status; |
069b6ad4 AA |
2617 | } |
2618 | ||
57b7b43b | 2619 | static __be32 |
88e588d5 | 2620 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 2621 | { |
88e588d5 AA |
2622 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
2623 | slot_seqid); | |
b85d4c01 BH |
2624 | |
2625 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
2626 | if (slot_inuse) { |
2627 | if (seqid == slot_seqid) | |
b85d4c01 BH |
2628 | return nfserr_jukebox; |
2629 | else | |
2630 | return nfserr_seq_misordered; | |
2631 | } | |
f6d82485 | 2632 | /* Note unsigned 32-bit arithmetic handles wraparound: */ |
88e588d5 | 2633 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 | 2634 | return nfs_ok; |
88e588d5 | 2635 | if (seqid == slot_seqid) |
b85d4c01 | 2636 | return nfserr_replay_cache; |
b85d4c01 BH |
2637 | return nfserr_seq_misordered; |
2638 | } | |
2639 | ||
49557cc7 AA |
2640 | /* |
2641 | * Cache the create session result into the create session single DRC | |
2642 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
2643 | * Do this for solo or embedded create session operations. | |
2644 | */ | |
2645 | static void | |
2646 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
57b7b43b | 2647 | struct nfsd4_clid_slot *slot, __be32 nfserr) |
49557cc7 AA |
2648 | { |
2649 | slot->sl_status = nfserr; | |
2650 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
2651 | } | |
2652 | ||
2653 | static __be32 | |
2654 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
2655 | struct nfsd4_clid_slot *slot) | |
2656 | { | |
2657 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
2658 | return slot->sl_status; | |
2659 | } | |
2660 | ||
1b74c25b MJ |
2661 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
2662 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
2663 | 1 + /* MIN tag is length with zero, only length */ \ | |
2664 | 3 + /* version, opcount, opcode */ \ | |
2665 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
2666 | /* seqid, slotID, slotID, cache */ \ | |
2667 | 4 ) * sizeof(__be32)) | |
2668 | ||
2669 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
2670 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
2671 | 1 + /* status */ \ | |
2672 | 1 + /* MIN tag is length with zero, only length */ \ | |
2673 | 3 + /* opcount, opcode, opstatus*/ \ | |
2674 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
2675 | /* seqid, slotID, slotID, slotID, status */ \ | |
2676 | 5 ) * sizeof(__be32)) | |
2677 | ||
55c760cf | 2678 | static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs *ca, struct nfsd_net *nn) |
1b74c25b | 2679 | { |
55c760cf BF |
2680 | u32 maxrpc = nn->nfsd_serv->sv_max_mesg; |
2681 | ||
373cd409 BF |
2682 | if (ca->maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ) |
2683 | return nfserr_toosmall; | |
2684 | if (ca->maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ) | |
2685 | return nfserr_toosmall; | |
55c760cf BF |
2686 | ca->headerpadsz = 0; |
2687 | ca->maxreq_sz = min_t(u32, ca->maxreq_sz, maxrpc); | |
2688 | ca->maxresp_sz = min_t(u32, ca->maxresp_sz, maxrpc); | |
2689 | ca->maxops = min_t(u32, ca->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
2690 | ca->maxresp_cached = min_t(u32, ca->maxresp_cached, | |
2691 | NFSD_SLOT_CACHE_SIZE + NFSD_MIN_HDR_SEQ_SZ); | |
2692 | ca->maxreqs = min_t(u32, ca->maxreqs, NFSD_MAX_SLOTS_PER_SESSION); | |
2693 | /* | |
2694 | * Note decreasing slot size below client's request may make it | |
2695 | * difficult for client to function correctly, whereas | |
2696 | * decreasing the number of slots will (just?) affect | |
2697 | * performance. When short on memory we therefore prefer to | |
2698 | * decrease number of slots instead of their size. Clients that | |
2699 | * request larger slots than they need will get poor results: | |
2700 | */ | |
2701 | ca->maxreqs = nfsd4_get_drc_mem(ca); | |
2702 | if (!ca->maxreqs) | |
2703 | return nfserr_jukebox; | |
2704 | ||
373cd409 | 2705 | return nfs_ok; |
1b74c25b MJ |
2706 | } |
2707 | ||
4500632f CL |
2708 | /* |
2709 | * Server's NFSv4.1 backchannel support is AUTH_SYS-only for now. | |
2710 | * These are based on similar macros in linux/sunrpc/msg_prot.h . | |
2711 | */ | |
2712 | #define RPC_MAX_HEADER_WITH_AUTH_SYS \ | |
2713 | (RPC_CALLHDRSIZE + 2 * (2 + UNX_CALLSLACK)) | |
2714 | ||
2715 | #define RPC_MAX_REPHEADER_WITH_AUTH_SYS \ | |
2716 | (RPC_REPHDRSIZE + (2 + NUL_REPLYSLACK)) | |
2717 | ||
8a891633 | 2718 | #define NFSD_CB_MAX_REQ_SZ ((NFS4_enc_cb_recall_sz + \ |
4500632f | 2719 | RPC_MAX_HEADER_WITH_AUTH_SYS) * sizeof(__be32)) |
8a891633 | 2720 | #define NFSD_CB_MAX_RESP_SZ ((NFS4_dec_cb_recall_sz + \ |
4500632f CL |
2721 | RPC_MAX_REPHEADER_WITH_AUTH_SYS) * \ |
2722 | sizeof(__be32)) | |
8a891633 | 2723 | |
06b332a5 | 2724 | static __be32 check_backchannel_attrs(struct nfsd4_channel_attrs *ca) |
1b74c25b | 2725 | { |
06b332a5 BF |
2726 | ca->headerpadsz = 0; |
2727 | ||
8a891633 | 2728 | if (ca->maxreq_sz < NFSD_CB_MAX_REQ_SZ) |
06b332a5 | 2729 | return nfserr_toosmall; |
8a891633 | 2730 | if (ca->maxresp_sz < NFSD_CB_MAX_RESP_SZ) |
06b332a5 BF |
2731 | return nfserr_toosmall; |
2732 | ca->maxresp_cached = 0; | |
2733 | if (ca->maxops < 2) | |
2734 | return nfserr_toosmall; | |
2735 | ||
2736 | return nfs_ok; | |
1b74c25b MJ |
2737 | } |
2738 | ||
b78724b7 BF |
2739 | static __be32 nfsd4_check_cb_sec(struct nfsd4_cb_sec *cbs) |
2740 | { | |
2741 | switch (cbs->flavor) { | |
2742 | case RPC_AUTH_NULL: | |
2743 | case RPC_AUTH_UNIX: | |
2744 | return nfs_ok; | |
2745 | default: | |
2746 | /* | |
2747 | * GSS case: the spec doesn't allow us to return this | |
2748 | * error. But it also doesn't allow us not to support | |
2749 | * GSS. | |
2750 | * I'd rather this fail hard than return some error the | |
2751 | * client might think it can already handle: | |
2752 | */ | |
2753 | return nfserr_encr_alg_unsupp; | |
2754 | } | |
2755 | } | |
2756 | ||
069b6ad4 AA |
2757 | __be32 |
2758 | nfsd4_create_session(struct svc_rqst *rqstp, | |
eb69853d | 2759 | struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) |
069b6ad4 | 2760 | { |
eb69853d | 2761 | struct nfsd4_create_session *cr_ses = &u->create_session; |
363168b4 | 2762 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 2763 | struct nfs4_client *conf, *unconf; |
d20c11d8 | 2764 | struct nfs4_client *old = NULL; |
ac7c46f2 | 2765 | struct nfsd4_session *new; |
81f0b2a4 | 2766 | struct nfsd4_conn *conn; |
49557cc7 | 2767 | struct nfsd4_clid_slot *cs_slot = NULL; |
57b7b43b | 2768 | __be32 status = 0; |
8daae4dc | 2769 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
ec6b5d7b | 2770 | |
a62573dc MJ |
2771 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
2772 | return nfserr_inval; | |
b78724b7 BF |
2773 | status = nfsd4_check_cb_sec(&cr_ses->cb_sec); |
2774 | if (status) | |
2775 | return status; | |
55c760cf | 2776 | status = check_forechannel_attrs(&cr_ses->fore_channel, nn); |
06b332a5 BF |
2777 | if (status) |
2778 | return status; | |
2779 | status = check_backchannel_attrs(&cr_ses->back_channel); | |
373cd409 | 2780 | if (status) |
f403e450 | 2781 | goto out_release_drc_mem; |
81f0b2a4 | 2782 | status = nfserr_jukebox; |
60810e54 | 2783 | new = alloc_session(&cr_ses->fore_channel, &cr_ses->back_channel); |
55c760cf BF |
2784 | if (!new) |
2785 | goto out_release_drc_mem; | |
81f0b2a4 BF |
2786 | conn = alloc_conn_from_crses(rqstp, cr_ses); |
2787 | if (!conn) | |
2788 | goto out_free_session; | |
a62573dc | 2789 | |
d20c11d8 | 2790 | spin_lock(&nn->client_lock); |
0a7ec377 | 2791 | unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn); |
8daae4dc | 2792 | conf = find_confirmed_client(&cr_ses->clientid, true, nn); |
78389046 | 2793 | WARN_ON_ONCE(conf && unconf); |
ec6b5d7b AA |
2794 | |
2795 | if (conf) { | |
57266a6e | 2796 | status = nfserr_wrong_cred; |
dedeb13f | 2797 | if (!nfsd4_mach_creds_match(conf, rqstp)) |
57266a6e | 2798 | goto out_free_conn; |
49557cc7 AA |
2799 | cs_slot = &conf->cl_cs_slot; |
2800 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
f5e22bb6 KM |
2801 | if (status) { |
2802 | if (status == nfserr_replay_cache) | |
2803 | status = nfsd4_replay_create_session(cr_ses, cs_slot); | |
81f0b2a4 | 2804 | goto out_free_conn; |
ec6b5d7b | 2805 | } |
ec6b5d7b AA |
2806 | } else if (unconf) { |
2807 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || | |
363168b4 | 2808 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b | 2809 | status = nfserr_clid_inuse; |
81f0b2a4 | 2810 | goto out_free_conn; |
ec6b5d7b | 2811 | } |
57266a6e | 2812 | status = nfserr_wrong_cred; |
dedeb13f | 2813 | if (!nfsd4_mach_creds_match(unconf, rqstp)) |
57266a6e | 2814 | goto out_free_conn; |
49557cc7 AA |
2815 | cs_slot = &unconf->cl_cs_slot; |
2816 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
2817 | if (status) { |
2818 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 2819 | status = nfserr_seq_misordered; |
81f0b2a4 | 2820 | goto out_free_conn; |
ec6b5d7b | 2821 | } |
382a62e7 | 2822 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
221a6876 | 2823 | if (old) { |
d20c11d8 | 2824 | status = mark_client_expired_locked(old); |
7abea1e8 JL |
2825 | if (status) { |
2826 | old = NULL; | |
221a6876 | 2827 | goto out_free_conn; |
7abea1e8 | 2828 | } |
221a6876 | 2829 | } |
8f9d3d3b | 2830 | move_to_confirmed(unconf); |
ec6b5d7b AA |
2831 | conf = unconf; |
2832 | } else { | |
2833 | status = nfserr_stale_clientid; | |
81f0b2a4 | 2834 | goto out_free_conn; |
ec6b5d7b | 2835 | } |
81f0b2a4 | 2836 | status = nfs_ok; |
4ce85c8c | 2837 | /* Persistent sessions are not supported */ |
408b79bc | 2838 | cr_ses->flags &= ~SESSION4_PERSIST; |
4ce85c8c | 2839 | /* Upshifting from TCP to RDMA is not supported */ |
408b79bc BF |
2840 | cr_ses->flags &= ~SESSION4_RDMA; |
2841 | ||
81f0b2a4 | 2842 | init_session(rqstp, new, conf, cr_ses); |
d20c11d8 | 2843 | nfsd4_get_session_locked(new); |
81f0b2a4 | 2844 | |
ac7c46f2 | 2845 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, |
ec6b5d7b | 2846 | NFS4_MAX_SESSIONID_LEN); |
86c3e16c | 2847 | cs_slot->sl_seqid++; |
49557cc7 | 2848 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 2849 | |
d20c11d8 | 2850 | /* cache solo and embedded create sessions under the client_lock */ |
49557cc7 | 2851 | nfsd4_cache_create_session(cr_ses, cs_slot, status); |
d20c11d8 JL |
2852 | spin_unlock(&nn->client_lock); |
2853 | /* init connection and backchannel */ | |
2854 | nfsd4_init_conn(rqstp, conn, new); | |
2855 | nfsd4_put_session(new); | |
d20c11d8 JL |
2856 | if (old) |
2857 | expire_client(old); | |
ec6b5d7b | 2858 | return status; |
81f0b2a4 | 2859 | out_free_conn: |
d20c11d8 | 2860 | spin_unlock(&nn->client_lock); |
81f0b2a4 | 2861 | free_conn(conn); |
d20c11d8 JL |
2862 | if (old) |
2863 | expire_client(old); | |
81f0b2a4 BF |
2864 | out_free_session: |
2865 | __free_session(new); | |
55c760cf BF |
2866 | out_release_drc_mem: |
2867 | nfsd4_put_drc_mem(&cr_ses->fore_channel); | |
1ca50792 | 2868 | return status; |
069b6ad4 AA |
2869 | } |
2870 | ||
1d1bc8f2 BF |
2871 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
2872 | { | |
2873 | switch (*dir) { | |
2874 | case NFS4_CDFC4_FORE: | |
2875 | case NFS4_CDFC4_BACK: | |
2876 | return nfs_ok; | |
2877 | case NFS4_CDFC4_FORE_OR_BOTH: | |
2878 | case NFS4_CDFC4_BACK_OR_BOTH: | |
2879 | *dir = NFS4_CDFC4_BOTH; | |
2880 | return nfs_ok; | |
2881 | }; | |
2882 | return nfserr_inval; | |
2883 | } | |
2884 | ||
eb69853d CH |
2885 | __be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, |
2886 | struct nfsd4_compound_state *cstate, | |
2887 | union nfsd4_op_u *u) | |
cb73a9f4 | 2888 | { |
eb69853d | 2889 | struct nfsd4_backchannel_ctl *bc = &u->backchannel_ctl; |
cb73a9f4 | 2890 | struct nfsd4_session *session = cstate->session; |
c9a49628 | 2891 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
b78724b7 | 2892 | __be32 status; |
cb73a9f4 | 2893 | |
b78724b7 BF |
2894 | status = nfsd4_check_cb_sec(&bc->bc_cb_sec); |
2895 | if (status) | |
2896 | return status; | |
c9a49628 | 2897 | spin_lock(&nn->client_lock); |
cb73a9f4 BF |
2898 | session->se_cb_prog = bc->bc_cb_program; |
2899 | session->se_cb_sec = bc->bc_cb_sec; | |
c9a49628 | 2900 | spin_unlock(&nn->client_lock); |
cb73a9f4 BF |
2901 | |
2902 | nfsd4_probe_callback(session->se_client); | |
2903 | ||
2904 | return nfs_ok; | |
2905 | } | |
2906 | ||
1d1bc8f2 BF |
2907 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, |
2908 | struct nfsd4_compound_state *cstate, | |
eb69853d | 2909 | union nfsd4_op_u *u) |
1d1bc8f2 | 2910 | { |
eb69853d | 2911 | struct nfsd4_bind_conn_to_session *bcts = &u->bind_conn_to_session; |
1d1bc8f2 | 2912 | __be32 status; |
3ba63671 | 2913 | struct nfsd4_conn *conn; |
4f6e6c17 | 2914 | struct nfsd4_session *session; |
d4e19e70 TM |
2915 | struct net *net = SVC_NET(rqstp); |
2916 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1d1bc8f2 BF |
2917 | |
2918 | if (!nfsd4_last_compound_op(rqstp)) | |
2919 | return nfserr_not_only_op; | |
c9a49628 | 2920 | spin_lock(&nn->client_lock); |
d4e19e70 | 2921 | session = find_in_sessionid_hashtbl(&bcts->sessionid, net, &status); |
c9a49628 | 2922 | spin_unlock(&nn->client_lock); |
4f6e6c17 | 2923 | if (!session) |
d4e19e70 | 2924 | goto out_no_session; |
57266a6e | 2925 | status = nfserr_wrong_cred; |
dedeb13f | 2926 | if (!nfsd4_mach_creds_match(session->se_client, rqstp)) |
57266a6e | 2927 | goto out; |
1d1bc8f2 | 2928 | status = nfsd4_map_bcts_dir(&bcts->dir); |
3ba63671 | 2929 | if (status) |
4f6e6c17 | 2930 | goto out; |
3ba63671 | 2931 | conn = alloc_conn(rqstp, bcts->dir); |
4f6e6c17 | 2932 | status = nfserr_jukebox; |
3ba63671 | 2933 | if (!conn) |
4f6e6c17 BF |
2934 | goto out; |
2935 | nfsd4_init_conn(rqstp, conn, session); | |
2936 | status = nfs_ok; | |
2937 | out: | |
d4e19e70 TM |
2938 | nfsd4_put_session(session); |
2939 | out_no_session: | |
4f6e6c17 | 2940 | return status; |
1d1bc8f2 BF |
2941 | } |
2942 | ||
5d4cec2f BF |
2943 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
2944 | { | |
2945 | if (!session) | |
2946 | return 0; | |
2947 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
2948 | } | |
2949 | ||
069b6ad4 | 2950 | __be32 |
eb69853d CH |
2951 | nfsd4_destroy_session(struct svc_rqst *r, struct nfsd4_compound_state *cstate, |
2952 | union nfsd4_op_u *u) | |
069b6ad4 | 2953 | { |
eb69853d | 2954 | struct nfsd4_destroy_session *sessionid = &u->destroy_session; |
e10e0cfc | 2955 | struct nfsd4_session *ses; |
abcdff09 | 2956 | __be32 status; |
f0f51f5c | 2957 | int ref_held_by_me = 0; |
d4e19e70 TM |
2958 | struct net *net = SVC_NET(r); |
2959 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
e10e0cfc | 2960 | |
abcdff09 | 2961 | status = nfserr_not_only_op; |
5d4cec2f | 2962 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 | 2963 | if (!nfsd4_last_compound_op(r)) |
abcdff09 | 2964 | goto out; |
f0f51f5c | 2965 | ref_held_by_me++; |
57716355 | 2966 | } |
e10e0cfc | 2967 | dump_sessionid(__func__, &sessionid->sessionid); |
c9a49628 | 2968 | spin_lock(&nn->client_lock); |
d4e19e70 | 2969 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid, net, &status); |
abcdff09 BF |
2970 | if (!ses) |
2971 | goto out_client_lock; | |
57266a6e | 2972 | status = nfserr_wrong_cred; |
dedeb13f | 2973 | if (!nfsd4_mach_creds_match(ses->se_client, r)) |
d4e19e70 | 2974 | goto out_put_session; |
f0f51f5c | 2975 | status = mark_session_dead_locked(ses, 1 + ref_held_by_me); |
66b2b9b2 | 2976 | if (status) |
f0f51f5c | 2977 | goto out_put_session; |
e10e0cfc | 2978 | unhash_session(ses); |
c9a49628 | 2979 | spin_unlock(&nn->client_lock); |
e10e0cfc | 2980 | |
84f5f7cc | 2981 | nfsd4_probe_callback_sync(ses->se_client); |
19cf5c02 | 2982 | |
c9a49628 | 2983 | spin_lock(&nn->client_lock); |
e10e0cfc | 2984 | status = nfs_ok; |
f0f51f5c | 2985 | out_put_session: |
d4e19e70 | 2986 | nfsd4_put_session_locked(ses); |
abcdff09 BF |
2987 | out_client_lock: |
2988 | spin_unlock(&nn->client_lock); | |
e10e0cfc | 2989 | out: |
e10e0cfc | 2990 | return status; |
069b6ad4 AA |
2991 | } |
2992 | ||
a663bdd8 | 2993 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
2994 | { |
2995 | struct nfsd4_conn *c; | |
2996 | ||
2997 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 2998 | if (c->cn_xprt == xpt) { |
328ead28 BF |
2999 | return c; |
3000 | } | |
3001 | } | |
3002 | return NULL; | |
3003 | } | |
3004 | ||
57266a6e | 3005 | static __be32 nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
3006 | { |
3007 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 3008 | struct nfsd4_conn *c; |
57266a6e | 3009 | __be32 status = nfs_ok; |
21b75b01 | 3010 | int ret; |
328ead28 BF |
3011 | |
3012 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 3013 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
57266a6e BF |
3014 | if (c) |
3015 | goto out_free; | |
3016 | status = nfserr_conn_not_bound_to_session; | |
3017 | if (clp->cl_mach_cred) | |
3018 | goto out_free; | |
328ead28 BF |
3019 | __nfsd4_hash_conn(new, ses); |
3020 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
3021 | ret = nfsd4_register_conn(new); |
3022 | if (ret) | |
3023 | /* oops; xprt is already down: */ | |
3024 | nfsd4_conn_lost(&new->cn_xpt_user); | |
57266a6e BF |
3025 | return nfs_ok; |
3026 | out_free: | |
3027 | spin_unlock(&clp->cl_lock); | |
3028 | free_conn(new); | |
3029 | return status; | |
328ead28 BF |
3030 | } |
3031 | ||
868b89c3 MJ |
3032 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
3033 | { | |
3034 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
3035 | ||
3036 | return args->opcnt > session->se_fchannel.maxops; | |
3037 | } | |
3038 | ||
ae82a8d0 MJ |
3039 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
3040 | struct nfsd4_session *session) | |
3041 | { | |
3042 | struct xdr_buf *xb = &rqstp->rq_arg; | |
3043 | ||
3044 | return xb->len > session->se_fchannel.maxreq_sz; | |
3045 | } | |
3046 | ||
ff371bc8 BF |
3047 | static bool replay_matches_cache(struct svc_rqst *rqstp, |
3048 | struct nfsd4_sequence *seq, struct nfsd4_slot *slot) | |
3049 | { | |
3050 | struct nfsd4_compoundargs *argp = rqstp->rq_argp; | |
3051 | ||
3052 | if ((bool)(slot->sl_flags & NFSD4_SLOT_CACHETHIS) != | |
3053 | (bool)seq->cachethis) | |
3054 | return false; | |
3055 | /* | |
3056 | * If there's an error than the reply can have fewer ops than | |
3057 | * the call. But if we cached a reply with *more* ops than the | |
3058 | * call you're sending us now, then this new call is clearly not | |
3059 | * really a replay of the old one: | |
3060 | */ | |
3061 | if (slot->sl_opcnt < argp->opcnt) | |
3062 | return false; | |
3063 | /* This is the only check explicitly called by spec: */ | |
3064 | if (!same_creds(&rqstp->rq_cred, &slot->sl_cred)) | |
3065 | return false; | |
3066 | /* | |
3067 | * There may be more comparisons we could actually do, but the | |
3068 | * spec doesn't require us to catch every case where the calls | |
3069 | * don't match (that would require caching the call as well as | |
3070 | * the reply), so we don't bother. | |
3071 | */ | |
3072 | return true; | |
3073 | } | |
3074 | ||
069b6ad4 | 3075 | __be32 |
eb69853d CH |
3076 | nfsd4_sequence(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3077 | union nfsd4_op_u *u) | |
069b6ad4 | 3078 | { |
eb69853d | 3079 | struct nfsd4_sequence *seq = &u->sequence; |
f9bb94c4 | 3080 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
47ee5298 | 3081 | struct xdr_stream *xdr = &resp->xdr; |
b85d4c01 | 3082 | struct nfsd4_session *session; |
221a6876 | 3083 | struct nfs4_client *clp; |
b85d4c01 | 3084 | struct nfsd4_slot *slot; |
a663bdd8 | 3085 | struct nfsd4_conn *conn; |
57b7b43b | 3086 | __be32 status; |
47ee5298 | 3087 | int buflen; |
d4e19e70 TM |
3088 | struct net *net = SVC_NET(rqstp); |
3089 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
b85d4c01 | 3090 | |
f9bb94c4 AA |
3091 | if (resp->opcnt != 1) |
3092 | return nfserr_sequence_pos; | |
3093 | ||
a663bdd8 BF |
3094 | /* |
3095 | * Will be either used or freed by nfsd4_sequence_check_conn | |
3096 | * below. | |
3097 | */ | |
3098 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
3099 | if (!conn) | |
3100 | return nfserr_jukebox; | |
3101 | ||
c9a49628 | 3102 | spin_lock(&nn->client_lock); |
d4e19e70 | 3103 | session = find_in_sessionid_hashtbl(&seq->sessionid, net, &status); |
b85d4c01 | 3104 | if (!session) |
221a6876 BF |
3105 | goto out_no_session; |
3106 | clp = session->se_client; | |
b85d4c01 | 3107 | |
868b89c3 MJ |
3108 | status = nfserr_too_many_ops; |
3109 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
66b2b9b2 | 3110 | goto out_put_session; |
868b89c3 | 3111 | |
ae82a8d0 MJ |
3112 | status = nfserr_req_too_big; |
3113 | if (nfsd4_request_too_big(rqstp, session)) | |
66b2b9b2 | 3114 | goto out_put_session; |
ae82a8d0 | 3115 | |
b85d4c01 | 3116 | status = nfserr_badslot; |
6c18ba9f | 3117 | if (seq->slotid >= session->se_fchannel.maxreqs) |
66b2b9b2 | 3118 | goto out_put_session; |
b85d4c01 | 3119 | |
557ce264 | 3120 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
3121 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
3122 | ||
a8dfdaeb AA |
3123 | /* We do not negotiate the number of slots yet, so set the |
3124 | * maxslots to the session maxreqs which is used to encode | |
3125 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
3126 | seq->maxslots = session->se_fchannel.maxreqs; | |
3127 | ||
73e79482 BF |
3128 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, |
3129 | slot->sl_flags & NFSD4_SLOT_INUSE); | |
b85d4c01 | 3130 | if (status == nfserr_replay_cache) { |
bf5c43c8 BF |
3131 | status = nfserr_seq_misordered; |
3132 | if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) | |
66b2b9b2 | 3133 | goto out_put_session; |
ff371bc8 BF |
3134 | status = nfserr_seq_false_retry; |
3135 | if (!replay_matches_cache(rqstp, seq, slot)) | |
3136 | goto out_put_session; | |
b85d4c01 BH |
3137 | cstate->slot = slot; |
3138 | cstate->session = session; | |
4b24ca7d | 3139 | cstate->clp = clp; |
da3846a2 | 3140 | /* Return the cached reply status and set cstate->status |
557ce264 | 3141 | * for nfsd4_proc_compound processing */ |
bf864a31 | 3142 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 3143 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 3144 | goto out; |
b85d4c01 BH |
3145 | } |
3146 | if (status) | |
66b2b9b2 | 3147 | goto out_put_session; |
b85d4c01 | 3148 | |
57266a6e | 3149 | status = nfsd4_sequence_check_conn(conn, session); |
a663bdd8 | 3150 | conn = NULL; |
57266a6e BF |
3151 | if (status) |
3152 | goto out_put_session; | |
328ead28 | 3153 | |
47ee5298 BF |
3154 | buflen = (seq->cachethis) ? |
3155 | session->se_fchannel.maxresp_cached : | |
3156 | session->se_fchannel.maxresp_sz; | |
3157 | status = (seq->cachethis) ? nfserr_rep_too_big_to_cache : | |
3158 | nfserr_rep_too_big; | |
a5cddc88 | 3159 | if (xdr_restrict_buflen(xdr, buflen - rqstp->rq_auth_slack)) |
47ee5298 | 3160 | goto out_put_session; |
32aaa62e | 3161 | svc_reserve(rqstp, buflen); |
47ee5298 BF |
3162 | |
3163 | status = nfs_ok; | |
b85d4c01 | 3164 | /* Success! bump slot seqid */ |
b85d4c01 | 3165 | slot->sl_seqid = seq->seqid; |
bf5c43c8 | 3166 | slot->sl_flags |= NFSD4_SLOT_INUSE; |
73e79482 BF |
3167 | if (seq->cachethis) |
3168 | slot->sl_flags |= NFSD4_SLOT_CACHETHIS; | |
bf5c43c8 BF |
3169 | else |
3170 | slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; | |
b85d4c01 BH |
3171 | |
3172 | cstate->slot = slot; | |
3173 | cstate->session = session; | |
4b24ca7d | 3174 | cstate->clp = clp; |
b85d4c01 | 3175 | |
b85d4c01 | 3176 | out: |
221a6876 BF |
3177 | switch (clp->cl_cb_state) { |
3178 | case NFSD4_CB_DOWN: | |
3179 | seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; | |
3180 | break; | |
3181 | case NFSD4_CB_FAULT: | |
3182 | seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; | |
3183 | break; | |
3184 | default: | |
3185 | seq->status_flags = 0; | |
aaf84eb9 | 3186 | } |
3bd64a5b BF |
3187 | if (!list_empty(&clp->cl_revoked)) |
3188 | seq->status_flags |= SEQ4_STATUS_RECALLABLE_STATE_REVOKED; | |
221a6876 | 3189 | out_no_session: |
3f42d2c4 KM |
3190 | if (conn) |
3191 | free_conn(conn); | |
c9a49628 | 3192 | spin_unlock(&nn->client_lock); |
b85d4c01 | 3193 | return status; |
66b2b9b2 | 3194 | out_put_session: |
d4e19e70 | 3195 | nfsd4_put_session_locked(session); |
221a6876 | 3196 | goto out_no_session; |
069b6ad4 AA |
3197 | } |
3198 | ||
b607664e TM |
3199 | void |
3200 | nfsd4_sequence_done(struct nfsd4_compoundres *resp) | |
3201 | { | |
3202 | struct nfsd4_compound_state *cs = &resp->cstate; | |
3203 | ||
3204 | if (nfsd4_has_session(cs)) { | |
b607664e TM |
3205 | if (cs->status != nfserr_replay_cache) { |
3206 | nfsd4_store_cache_entry(resp); | |
3207 | cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE; | |
3208 | } | |
d4e19e70 | 3209 | /* Drop session reference that was taken in nfsd4_sequence() */ |
b607664e | 3210 | nfsd4_put_session(cs->session); |
4b24ca7d JL |
3211 | } else if (cs->clp) |
3212 | put_client_renew(cs->clp); | |
b607664e TM |
3213 | } |
3214 | ||
345c2842 | 3215 | __be32 |
eb69853d CH |
3216 | nfsd4_destroy_clientid(struct svc_rqst *rqstp, |
3217 | struct nfsd4_compound_state *cstate, | |
3218 | union nfsd4_op_u *u) | |
345c2842 | 3219 | { |
eb69853d | 3220 | struct nfsd4_destroy_clientid *dc = &u->destroy_clientid; |
6b10ad19 TM |
3221 | struct nfs4_client *conf, *unconf; |
3222 | struct nfs4_client *clp = NULL; | |
57b7b43b | 3223 | __be32 status = 0; |
8daae4dc | 3224 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
345c2842 | 3225 | |
6b10ad19 | 3226 | spin_lock(&nn->client_lock); |
0a7ec377 | 3227 | unconf = find_unconfirmed_client(&dc->clientid, true, nn); |
8daae4dc | 3228 | conf = find_confirmed_client(&dc->clientid, true, nn); |
78389046 | 3229 | WARN_ON_ONCE(conf && unconf); |
345c2842 MJ |
3230 | |
3231 | if (conf) { | |
c0293b01 | 3232 | if (client_has_state(conf)) { |
345c2842 MJ |
3233 | status = nfserr_clientid_busy; |
3234 | goto out; | |
3235 | } | |
fd699b8a JL |
3236 | status = mark_client_expired_locked(conf); |
3237 | if (status) | |
3238 | goto out; | |
6b10ad19 | 3239 | clp = conf; |
345c2842 MJ |
3240 | } else if (unconf) |
3241 | clp = unconf; | |
3242 | else { | |
3243 | status = nfserr_stale_clientid; | |
3244 | goto out; | |
3245 | } | |
dedeb13f | 3246 | if (!nfsd4_mach_creds_match(clp, rqstp)) { |
6b10ad19 | 3247 | clp = NULL; |
57266a6e BF |
3248 | status = nfserr_wrong_cred; |
3249 | goto out; | |
3250 | } | |
6b10ad19 | 3251 | unhash_client_locked(clp); |
345c2842 | 3252 | out: |
6b10ad19 | 3253 | spin_unlock(&nn->client_lock); |
6b10ad19 TM |
3254 | if (clp) |
3255 | expire_client(clp); | |
345c2842 MJ |
3256 | return status; |
3257 | } | |
3258 | ||
4dc6ec00 | 3259 | __be32 |
eb69853d CH |
3260 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, |
3261 | struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) | |
4dc6ec00 | 3262 | { |
eb69853d | 3263 | struct nfsd4_reclaim_complete *rc = &u->reclaim_complete; |
57b7b43b | 3264 | __be32 status = 0; |
bcecf1cc | 3265 | |
4dc6ec00 BF |
3266 | if (rc->rca_one_fs) { |
3267 | if (!cstate->current_fh.fh_dentry) | |
3268 | return nfserr_nofilehandle; | |
3269 | /* | |
3270 | * We don't take advantage of the rca_one_fs case. | |
3271 | * That's OK, it's optional, we can safely ignore it. | |
3272 | */ | |
d28c442f | 3273 | return nfs_ok; |
4dc6ec00 | 3274 | } |
bcecf1cc | 3275 | |
bcecf1cc | 3276 | status = nfserr_complete_already; |
a52d726b JL |
3277 | if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, |
3278 | &cstate->session->se_client->cl_flags)) | |
bcecf1cc MJ |
3279 | goto out; |
3280 | ||
3281 | status = nfserr_stale_clientid; | |
3282 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
3283 | /* |
3284 | * The following error isn't really legal. | |
3285 | * But we only get here if the client just explicitly | |
3286 | * destroyed the client. Surely it no longer cares what | |
3287 | * error it gets back on an operation for the dead | |
3288 | * client. | |
3289 | */ | |
bcecf1cc MJ |
3290 | goto out; |
3291 | ||
3292 | status = nfs_ok; | |
2a4317c5 | 3293 | nfsd4_client_record_create(cstate->session->se_client); |
bcecf1cc | 3294 | out: |
bcecf1cc | 3295 | return status; |
4dc6ec00 BF |
3296 | } |
3297 | ||
b37ad28b | 3298 | __be32 |
b591480b | 3299 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 3300 | union nfsd4_op_u *u) |
1da177e4 | 3301 | { |
eb69853d | 3302 | struct nfsd4_setclientid *setclid = &u->setclientid; |
a084daf5 | 3303 | struct xdr_netobj clname = setclid->se_name; |
1da177e4 | 3304 | nfs4_verifier clverifier = setclid->se_verf; |
3dbacee6 TM |
3305 | struct nfs4_client *conf, *new; |
3306 | struct nfs4_client *unconf = NULL; | |
b37ad28b | 3307 | __be32 status; |
c212cecf SK |
3308 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
3309 | ||
5cc40fd7 TM |
3310 | new = create_client(clname, rqstp, &clverifier); |
3311 | if (new == NULL) | |
3312 | return nfserr_jukebox; | |
63db4632 | 3313 | /* Cases below refer to rfc 3530 section 14.2.33: */ |
3dbacee6 | 3314 | spin_lock(&nn->client_lock); |
382a62e7 | 3315 | conf = find_confirmed_client_by_name(&clname, nn); |
2b634821 | 3316 | if (conf && client_has_state(conf)) { |
63db4632 | 3317 | /* case 0: */ |
1da177e4 | 3318 | status = nfserr_clid_inuse; |
e203d506 BF |
3319 | if (clp_used_exchangeid(conf)) |
3320 | goto out; | |
026722c2 | 3321 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
3322 | char addr_str[INET6_ADDRSTRLEN]; |
3323 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
3324 | sizeof(addr_str)); | |
3325 | dprintk("NFSD: setclientid: string in use by client " | |
3326 | "at %s\n", addr_str); | |
1da177e4 LT |
3327 | goto out; |
3328 | } | |
1da177e4 | 3329 | } |
a99454aa | 3330 | unconf = find_unconfirmed_client_by_name(&clname, nn); |
8f930711 | 3331 | if (unconf) |
3dbacee6 | 3332 | unhash_client_locked(unconf); |
41eb1670 | 3333 | if (conf && same_verf(&conf->cl_verifier, &clverifier)) { |
63db4632 | 3334 | /* case 1: probable callback update */ |
1da177e4 | 3335 | copy_clid(new, conf); |
41eb1670 KM |
3336 | gen_confirm(new, nn); |
3337 | } else /* case 4 (new client) or cases 2, 3 (client reboot): */ | |
c212cecf | 3338 | gen_clid(new, nn); |
8323c3b2 | 3339 | new->cl_minorversion = 0; |
6f3d772f | 3340 | gen_callback(new, setclid, rqstp); |
ac55fdc4 | 3341 | add_to_unconfirmed(new); |
1da177e4 LT |
3342 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
3343 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
3344 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
5cc40fd7 | 3345 | new = NULL; |
1da177e4 LT |
3346 | status = nfs_ok; |
3347 | out: | |
3dbacee6 | 3348 | spin_unlock(&nn->client_lock); |
5cc40fd7 TM |
3349 | if (new) |
3350 | free_client(new); | |
3dbacee6 TM |
3351 | if (unconf) |
3352 | expire_client(unconf); | |
1da177e4 LT |
3353 | return status; |
3354 | } | |
3355 | ||
3356 | ||
b37ad28b | 3357 | __be32 |
b591480b | 3358 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
eb69853d CH |
3359 | struct nfsd4_compound_state *cstate, |
3360 | union nfsd4_op_u *u) | |
1da177e4 | 3361 | { |
eb69853d CH |
3362 | struct nfsd4_setclientid_confirm *setclientid_confirm = |
3363 | &u->setclientid_confirm; | |
21ab45a4 | 3364 | struct nfs4_client *conf, *unconf; |
d20c11d8 | 3365 | struct nfs4_client *old = NULL; |
1da177e4 LT |
3366 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
3367 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 3368 | __be32 status; |
7f2210fa | 3369 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 3370 | |
2c142baa | 3371 | if (STALE_CLIENTID(clid, nn)) |
1da177e4 | 3372 | return nfserr_stale_clientid; |
21ab45a4 | 3373 | |
d20c11d8 | 3374 | spin_lock(&nn->client_lock); |
8daae4dc | 3375 | conf = find_confirmed_client(clid, false, nn); |
0a7ec377 | 3376 | unconf = find_unconfirmed_client(clid, false, nn); |
a186e767 | 3377 | /* |
8695b90a BF |
3378 | * We try hard to give out unique clientid's, so if we get an |
3379 | * attempt to confirm the same clientid with a different cred, | |
f984a7ce BF |
3380 | * the client may be buggy; this should never happen. |
3381 | * | |
3382 | * Nevertheless, RFC 7530 recommends INUSE for this case: | |
a186e767 | 3383 | */ |
f984a7ce | 3384 | status = nfserr_clid_inuse; |
8695b90a BF |
3385 | if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) |
3386 | goto out; | |
3387 | if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) | |
3388 | goto out; | |
63db4632 | 3389 | /* cases below refer to rfc 3530 section 14.2.34: */ |
90d700b7 | 3390 | if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) { |
7d22fc11 BF |
3391 | if (conf && same_verf(&confirm, &conf->cl_confirm)) { |
3392 | /* case 2: probable retransmit */ | |
1da177e4 | 3393 | status = nfs_ok; |
7d22fc11 | 3394 | } else /* case 4: client hasn't noticed we rebooted yet? */ |
90d700b7 BF |
3395 | status = nfserr_stale_clientid; |
3396 | goto out; | |
3397 | } | |
3398 | status = nfs_ok; | |
3399 | if (conf) { /* case 1: callback update */ | |
d20c11d8 JL |
3400 | old = unconf; |
3401 | unhash_client_locked(old); | |
8695b90a | 3402 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
90d700b7 | 3403 | } else { /* case 3: normal case; new or rebooted client */ |
d20c11d8 JL |
3404 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
3405 | if (old) { | |
2b634821 BF |
3406 | status = nfserr_clid_inuse; |
3407 | if (client_has_state(old) | |
3408 | && !same_creds(&unconf->cl_cred, | |
3409 | &old->cl_cred)) | |
3410 | goto out; | |
d20c11d8 | 3411 | status = mark_client_expired_locked(old); |
7abea1e8 JL |
3412 | if (status) { |
3413 | old = NULL; | |
221a6876 | 3414 | goto out; |
7abea1e8 | 3415 | } |
221a6876 | 3416 | } |
8695b90a | 3417 | move_to_confirmed(unconf); |
d20c11d8 | 3418 | conf = unconf; |
08e8987c | 3419 | } |
d20c11d8 JL |
3420 | get_client_locked(conf); |
3421 | spin_unlock(&nn->client_lock); | |
3422 | nfsd4_probe_callback(conf); | |
3423 | spin_lock(&nn->client_lock); | |
3424 | put_client_renew_locked(conf); | |
1da177e4 | 3425 | out: |
d20c11d8 JL |
3426 | spin_unlock(&nn->client_lock); |
3427 | if (old) | |
3428 | expire_client(old); | |
1da177e4 LT |
3429 | return status; |
3430 | } | |
3431 | ||
32513b40 BF |
3432 | static struct nfs4_file *nfsd4_alloc_file(void) |
3433 | { | |
3434 | return kmem_cache_alloc(file_slab, GFP_KERNEL); | |
3435 | } | |
3436 | ||
1da177e4 | 3437 | /* OPEN Share state helper functions */ |
5b095e99 JL |
3438 | static void nfsd4_init_file(struct knfsd_fh *fh, unsigned int hashval, |
3439 | struct nfs4_file *fp) | |
1da177e4 | 3440 | { |
950e0118 TM |
3441 | lockdep_assert_held(&state_lock); |
3442 | ||
32513b40 | 3443 | atomic_set(&fp->fi_ref, 1); |
1d31a253 | 3444 | spin_lock_init(&fp->fi_lock); |
32513b40 BF |
3445 | INIT_LIST_HEAD(&fp->fi_stateids); |
3446 | INIT_LIST_HEAD(&fp->fi_delegations); | |
8287f009 | 3447 | INIT_LIST_HEAD(&fp->fi_clnt_odstate); |
e2cf80d7 | 3448 | fh_copy_shallow(&fp->fi_fhandle, fh); |
0c637be8 | 3449 | fp->fi_deleg_file = NULL; |
32513b40 | 3450 | fp->fi_had_conflict = false; |
baeb4ff0 | 3451 | fp->fi_share_deny = 0; |
32513b40 BF |
3452 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); |
3453 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
9cf514cc CH |
3454 | #ifdef CONFIG_NFSD_PNFS |
3455 | INIT_LIST_HEAD(&fp->fi_lo_states); | |
c5c707f9 | 3456 | atomic_set(&fp->fi_lo_recalls, 0); |
9cf514cc | 3457 | #endif |
5b095e99 | 3458 | hlist_add_head_rcu(&fp->fi_hash, &file_hashtbl[hashval]); |
1da177e4 LT |
3459 | } |
3460 | ||
e8ff2a84 | 3461 | void |
1da177e4 LT |
3462 | nfsd4_free_slabs(void) |
3463 | { | |
8287f009 | 3464 | kmem_cache_destroy(odstate_slab); |
abf1135b CH |
3465 | kmem_cache_destroy(openowner_slab); |
3466 | kmem_cache_destroy(lockowner_slab); | |
3467 | kmem_cache_destroy(file_slab); | |
3468 | kmem_cache_destroy(stateid_slab); | |
3469 | kmem_cache_destroy(deleg_slab); | |
e60d4398 | 3470 | } |
1da177e4 | 3471 | |
72083396 | 3472 | int |
e60d4398 N |
3473 | nfsd4_init_slabs(void) |
3474 | { | |
fe0750e5 BF |
3475 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
3476 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
3477 | if (openowner_slab == NULL) | |
abf1135b | 3478 | goto out; |
fe0750e5 | 3479 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", |
3c40794b | 3480 | sizeof(struct nfs4_lockowner), 0, 0, NULL); |
fe0750e5 | 3481 | if (lockowner_slab == NULL) |
abf1135b | 3482 | goto out_free_openowner_slab; |
e60d4398 | 3483 | file_slab = kmem_cache_create("nfsd4_files", |
20c2df83 | 3484 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 | 3485 | if (file_slab == NULL) |
abf1135b | 3486 | goto out_free_lockowner_slab; |
5ac049ac | 3487 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
dcef0413 | 3488 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
5ac049ac | 3489 | if (stateid_slab == NULL) |
abf1135b | 3490 | goto out_free_file_slab; |
5b2d21c1 | 3491 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 3492 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 | 3493 | if (deleg_slab == NULL) |
abf1135b | 3494 | goto out_free_stateid_slab; |
8287f009 SB |
3495 | odstate_slab = kmem_cache_create("nfsd4_odstate", |
3496 | sizeof(struct nfs4_clnt_odstate), 0, 0, NULL); | |
3497 | if (odstate_slab == NULL) | |
3498 | goto out_free_deleg_slab; | |
e60d4398 | 3499 | return 0; |
abf1135b | 3500 | |
8287f009 SB |
3501 | out_free_deleg_slab: |
3502 | kmem_cache_destroy(deleg_slab); | |
abf1135b CH |
3503 | out_free_stateid_slab: |
3504 | kmem_cache_destroy(stateid_slab); | |
3505 | out_free_file_slab: | |
3506 | kmem_cache_destroy(file_slab); | |
3507 | out_free_lockowner_slab: | |
3508 | kmem_cache_destroy(lockowner_slab); | |
3509 | out_free_openowner_slab: | |
3510 | kmem_cache_destroy(openowner_slab); | |
3511 | out: | |
e60d4398 N |
3512 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); |
3513 | return -ENOMEM; | |
1da177e4 LT |
3514 | } |
3515 | ||
ff194bd9 | 3516 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 3517 | { |
ff194bd9 BF |
3518 | rp->rp_status = nfserr_serverfault; |
3519 | rp->rp_buflen = 0; | |
3520 | rp->rp_buf = rp->rp_ibuf; | |
58fb12e6 JL |
3521 | mutex_init(&rp->rp_mutex); |
3522 | } | |
3523 | ||
3524 | static void nfsd4_cstate_assign_replay(struct nfsd4_compound_state *cstate, | |
3525 | struct nfs4_stateowner *so) | |
3526 | { | |
3527 | if (!nfsd4_has_session(cstate)) { | |
3528 | mutex_lock(&so->so_replay.rp_mutex); | |
b5971afa | 3529 | cstate->replay_owner = nfs4_get_stateowner(so); |
58fb12e6 JL |
3530 | } |
3531 | } | |
3532 | ||
3533 | void nfsd4_cstate_clear_replay(struct nfsd4_compound_state *cstate) | |
3534 | { | |
3535 | struct nfs4_stateowner *so = cstate->replay_owner; | |
3536 | ||
3537 | if (so != NULL) { | |
3538 | cstate->replay_owner = NULL; | |
3539 | mutex_unlock(&so->so_replay.rp_mutex); | |
3540 | nfs4_put_stateowner(so); | |
3541 | } | |
1da177e4 LT |
3542 | } |
3543 | ||
fe0750e5 | 3544 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 3545 | { |
1da177e4 | 3546 | struct nfs4_stateowner *sop; |
1da177e4 | 3547 | |
fe0750e5 | 3548 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
3549 | if (!sop) |
3550 | return NULL; | |
3551 | ||
3552 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); | |
3553 | if (!sop->so_owner.data) { | |
fe0750e5 | 3554 | kmem_cache_free(slab, sop); |
1da177e4 | 3555 | return NULL; |
ff194bd9 BF |
3556 | } |
3557 | sop->so_owner.len = owner->len; | |
3558 | ||
ea1da636 | 3559 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 BF |
3560 | sop->so_client = clp; |
3561 | init_nfs4_replay(&sop->so_replay); | |
6b180f0b | 3562 | atomic_set(&sop->so_count, 1); |
ff194bd9 BF |
3563 | return sop; |
3564 | } | |
3565 | ||
fe0750e5 | 3566 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 | 3567 | { |
d4f0489f | 3568 | lockdep_assert_held(&clp->cl_lock); |
9b531137 | 3569 | |
d4f0489f TM |
3570 | list_add(&oo->oo_owner.so_strhash, |
3571 | &clp->cl_ownerstr_hashtbl[strhashval]); | |
fe0750e5 | 3572 | list_add(&oo->oo_perclient, &clp->cl_openowners); |
ff194bd9 BF |
3573 | } |
3574 | ||
8f4b54c5 JL |
3575 | static void nfs4_unhash_openowner(struct nfs4_stateowner *so) |
3576 | { | |
d4f0489f | 3577 | unhash_openowner_locked(openowner(so)); |
8f4b54c5 JL |
3578 | } |
3579 | ||
6b180f0b JL |
3580 | static void nfs4_free_openowner(struct nfs4_stateowner *so) |
3581 | { | |
3582 | struct nfs4_openowner *oo = openowner(so); | |
3583 | ||
3584 | kmem_cache_free(openowner_slab, oo); | |
3585 | } | |
3586 | ||
3587 | static const struct nfs4_stateowner_operations openowner_ops = { | |
8f4b54c5 JL |
3588 | .so_unhash = nfs4_unhash_openowner, |
3589 | .so_free = nfs4_free_openowner, | |
6b180f0b JL |
3590 | }; |
3591 | ||
7fc0564e AE |
3592 | static struct nfs4_ol_stateid * |
3593 | nfsd4_find_existing_open(struct nfs4_file *fp, struct nfsd4_open *open) | |
3594 | { | |
3595 | struct nfs4_ol_stateid *local, *ret = NULL; | |
3596 | struct nfs4_openowner *oo = open->op_openowner; | |
3597 | ||
3598 | lockdep_assert_held(&fp->fi_lock); | |
3599 | ||
3600 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { | |
3601 | /* ignore lock owners */ | |
3602 | if (local->st_stateowner->so_is_open_owner == 0) | |
3603 | continue; | |
db77ab54 TM |
3604 | if (local->st_stateowner != &oo->oo_owner) |
3605 | continue; | |
3606 | if (local->st_stid.sc_type == NFS4_OPEN_STID) { | |
7fc0564e AE |
3607 | ret = local; |
3608 | atomic_inc(&ret->st_stid.sc_count); | |
3609 | break; | |
3610 | } | |
3611 | } | |
3612 | return ret; | |
3613 | } | |
3614 | ||
db77ab54 TM |
3615 | static __be32 |
3616 | nfsd4_verify_open_stid(struct nfs4_stid *s) | |
3617 | { | |
3618 | __be32 ret = nfs_ok; | |
3619 | ||
3620 | switch (s->sc_type) { | |
3621 | default: | |
3622 | break; | |
3623 | case NFS4_CLOSED_STID: | |
3624 | case NFS4_CLOSED_DELEG_STID: | |
3625 | ret = nfserr_bad_stateid; | |
3626 | break; | |
3627 | case NFS4_REVOKED_DELEG_STID: | |
3628 | ret = nfserr_deleg_revoked; | |
3629 | } | |
3630 | return ret; | |
3631 | } | |
3632 | ||
3633 | /* Lock the stateid st_mutex, and deal with races with CLOSE */ | |
3634 | static __be32 | |
3635 | nfsd4_lock_ol_stateid(struct nfs4_ol_stateid *stp) | |
3636 | { | |
3637 | __be32 ret; | |
3638 | ||
3639 | mutex_lock(&stp->st_mutex); | |
3640 | ret = nfsd4_verify_open_stid(&stp->st_stid); | |
3641 | if (ret != nfs_ok) | |
3642 | mutex_unlock(&stp->st_mutex); | |
3643 | return ret; | |
3644 | } | |
3645 | ||
3646 | static struct nfs4_ol_stateid * | |
3647 | nfsd4_find_and_lock_existing_open(struct nfs4_file *fp, struct nfsd4_open *open) | |
3648 | { | |
3649 | struct nfs4_ol_stateid *stp; | |
3650 | for (;;) { | |
3651 | spin_lock(&fp->fi_lock); | |
3652 | stp = nfsd4_find_existing_open(fp, open); | |
3653 | spin_unlock(&fp->fi_lock); | |
3654 | if (!stp || nfsd4_lock_ol_stateid(stp) == nfs_ok) | |
3655 | break; | |
3656 | nfs4_put_stid(&stp->st_stid); | |
3657 | } | |
3658 | return stp; | |
3659 | } | |
3660 | ||
fe0750e5 | 3661 | static struct nfs4_openowner * |
13d6f66b | 3662 | alloc_init_open_stateowner(unsigned int strhashval, struct nfsd4_open *open, |
db24b3b4 JL |
3663 | struct nfsd4_compound_state *cstate) |
3664 | { | |
13d6f66b | 3665 | struct nfs4_client *clp = cstate->clp; |
7ffb5880 | 3666 | struct nfs4_openowner *oo, *ret; |
ff194bd9 | 3667 | |
fe0750e5 BF |
3668 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
3669 | if (!oo) | |
ff194bd9 | 3670 | return NULL; |
6b180f0b | 3671 | oo->oo_owner.so_ops = &openowner_ops; |
fe0750e5 BF |
3672 | oo->oo_owner.so_is_open_owner = 1; |
3673 | oo->oo_owner.so_seqid = open->op_seqid; | |
d3134b10 | 3674 | oo->oo_flags = 0; |
db24b3b4 JL |
3675 | if (nfsd4_has_session(cstate)) |
3676 | oo->oo_flags |= NFS4_OO_CONFIRMED; | |
fe0750e5 | 3677 | oo->oo_time = 0; |
38c387b5 | 3678 | oo->oo_last_closed_stid = NULL; |
fe0750e5 | 3679 | INIT_LIST_HEAD(&oo->oo_close_lru); |
d4f0489f TM |
3680 | spin_lock(&clp->cl_lock); |
3681 | ret = find_openstateowner_str_locked(strhashval, open, clp); | |
7ffb5880 TM |
3682 | if (ret == NULL) { |
3683 | hash_openowner(oo, clp, strhashval); | |
3684 | ret = oo; | |
3685 | } else | |
d50ffded KM |
3686 | nfs4_free_stateowner(&oo->oo_owner); |
3687 | ||
d4f0489f | 3688 | spin_unlock(&clp->cl_lock); |
c5952338 | 3689 | return ret; |
1da177e4 LT |
3690 | } |
3691 | ||
7fc0564e | 3692 | static struct nfs4_ol_stateid * |
8c7245ab | 3693 | init_open_stateid(struct nfs4_file *fp, struct nfsd4_open *open) |
7fc0564e AE |
3694 | { |
3695 | ||
fe0750e5 | 3696 | struct nfs4_openowner *oo = open->op_openowner; |
7fc0564e | 3697 | struct nfs4_ol_stateid *retstp = NULL; |
8c7245ab | 3698 | struct nfs4_ol_stateid *stp; |
1da177e4 | 3699 | |
8c7245ab | 3700 | stp = open->op_stp; |
5cc1fb2a OD |
3701 | /* We are moving these outside of the spinlocks to avoid the warnings */ |
3702 | mutex_init(&stp->st_mutex); | |
3703 | mutex_lock(&stp->st_mutex); | |
3704 | ||
db77ab54 | 3705 | retry: |
7fc0564e AE |
3706 | spin_lock(&oo->oo_owner.so_client->cl_lock); |
3707 | spin_lock(&fp->fi_lock); | |
3708 | ||
3709 | retstp = nfsd4_find_existing_open(fp, open); | |
3710 | if (retstp) | |
3711 | goto out_unlock; | |
8c7245ab OD |
3712 | |
3713 | open->op_stp = NULL; | |
d6f2bc5d | 3714 | atomic_inc(&stp->st_stid.sc_count); |
3abdb607 | 3715 | stp->st_stid.sc_type = NFS4_OPEN_STID; |
3c87b9b7 | 3716 | INIT_LIST_HEAD(&stp->st_locks); |
b5971afa | 3717 | stp->st_stateowner = nfs4_get_stateowner(&oo->oo_owner); |
13cd2184 | 3718 | get_nfs4_file(fp); |
11b9164a | 3719 | stp->st_stid.sc_file = fp; |
1da177e4 LT |
3720 | stp->st_access_bmap = 0; |
3721 | stp->st_deny_bmap = 0; | |
4c4cd222 | 3722 | stp->st_openstp = NULL; |
1c755dc1 | 3723 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); |
1d31a253 | 3724 | list_add(&stp->st_perfile, &fp->fi_stateids); |
7fc0564e AE |
3725 | |
3726 | out_unlock: | |
1d31a253 | 3727 | spin_unlock(&fp->fi_lock); |
1c755dc1 | 3728 | spin_unlock(&oo->oo_owner.so_client->cl_lock); |
5cc1fb2a | 3729 | if (retstp) { |
db77ab54 TM |
3730 | /* Handle races with CLOSE */ |
3731 | if (nfsd4_lock_ol_stateid(retstp) != nfs_ok) { | |
3732 | nfs4_put_stid(&retstp->st_stid); | |
3733 | goto retry; | |
3734 | } | |
8c7245ab | 3735 | /* To keep mutex tracking happy */ |
5cc1fb2a | 3736 | mutex_unlock(&stp->st_mutex); |
8c7245ab | 3737 | stp = retstp; |
5cc1fb2a | 3738 | } |
8c7245ab | 3739 | return stp; |
1da177e4 LT |
3740 | } |
3741 | ||
d3134b10 JL |
3742 | /* |
3743 | * In the 4.0 case we need to keep the owners around a little while to handle | |
3744 | * CLOSE replay. We still do need to release any file access that is held by | |
3745 | * them before returning however. | |
3746 | */ | |
fd39ca9a | 3747 | static void |
d3134b10 | 3748 | move_to_close_lru(struct nfs4_ol_stateid *s, struct net *net) |
1da177e4 | 3749 | { |
217526e7 | 3750 | struct nfs4_ol_stateid *last; |
d3134b10 JL |
3751 | struct nfs4_openowner *oo = openowner(s->st_stateowner); |
3752 | struct nfsd_net *nn = net_generic(s->st_stid.sc_client->net, | |
3753 | nfsd_net_id); | |
73758fed | 3754 | |
fe0750e5 | 3755 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 3756 | |
b401be22 JL |
3757 | /* |
3758 | * We know that we hold one reference via nfsd4_close, and another | |
3759 | * "persistent" reference for the client. If the refcount is higher | |
3760 | * than 2, then there are still calls in progress that are using this | |
3761 | * stateid. We can't put the sc_file reference until they are finished. | |
3762 | * Wait for the refcount to drop to 2. Since it has been unhashed, | |
3763 | * there should be no danger of the refcount going back up again at | |
3764 | * this point. | |
3765 | */ | |
3766 | wait_event(close_wq, atomic_read(&s->st_stid.sc_count) == 2); | |
3767 | ||
d3134b10 JL |
3768 | release_all_access(s); |
3769 | if (s->st_stid.sc_file) { | |
3770 | put_nfs4_file(s->st_stid.sc_file); | |
3771 | s->st_stid.sc_file = NULL; | |
3772 | } | |
217526e7 JL |
3773 | |
3774 | spin_lock(&nn->client_lock); | |
3775 | last = oo->oo_last_closed_stid; | |
d3134b10 | 3776 | oo->oo_last_closed_stid = s; |
73758fed | 3777 | list_move_tail(&oo->oo_close_lru, &nn->close_lru); |
fe0750e5 | 3778 | oo->oo_time = get_seconds(); |
217526e7 JL |
3779 | spin_unlock(&nn->client_lock); |
3780 | if (last) | |
3781 | nfs4_put_stid(&last->st_stid); | |
1da177e4 LT |
3782 | } |
3783 | ||
1da177e4 LT |
3784 | /* search file_hashtbl[] for file */ |
3785 | static struct nfs4_file * | |
5b095e99 | 3786 | find_file_locked(struct knfsd_fh *fh, unsigned int hashval) |
1da177e4 | 3787 | { |
1da177e4 LT |
3788 | struct nfs4_file *fp; |
3789 | ||
5b095e99 | 3790 | hlist_for_each_entry_rcu(fp, &file_hashtbl[hashval], fi_hash) { |
4d94c2ef | 3791 | if (fh_match(&fp->fi_fhandle, fh)) { |
5b095e99 JL |
3792 | if (atomic_inc_not_zero(&fp->fi_ref)) |
3793 | return fp; | |
13cd2184 | 3794 | } |
1da177e4 LT |
3795 | } |
3796 | return NULL; | |
3797 | } | |
3798 | ||
e6ba76e1 | 3799 | struct nfs4_file * |
ca943217 | 3800 | find_file(struct knfsd_fh *fh) |
950e0118 TM |
3801 | { |
3802 | struct nfs4_file *fp; | |
5b095e99 | 3803 | unsigned int hashval = file_hashval(fh); |
950e0118 | 3804 | |
5b095e99 JL |
3805 | rcu_read_lock(); |
3806 | fp = find_file_locked(fh, hashval); | |
3807 | rcu_read_unlock(); | |
950e0118 TM |
3808 | return fp; |
3809 | } | |
3810 | ||
3811 | static struct nfs4_file * | |
f9c00c3a | 3812 | find_or_add_file(struct nfs4_file *new, struct knfsd_fh *fh) |
950e0118 TM |
3813 | { |
3814 | struct nfs4_file *fp; | |
5b095e99 JL |
3815 | unsigned int hashval = file_hashval(fh); |
3816 | ||
3817 | rcu_read_lock(); | |
3818 | fp = find_file_locked(fh, hashval); | |
3819 | rcu_read_unlock(); | |
3820 | if (fp) | |
3821 | return fp; | |
950e0118 TM |
3822 | |
3823 | spin_lock(&state_lock); | |
5b095e99 JL |
3824 | fp = find_file_locked(fh, hashval); |
3825 | if (likely(fp == NULL)) { | |
3826 | nfsd4_init_file(fh, hashval, new); | |
950e0118 TM |
3827 | fp = new; |
3828 | } | |
3829 | spin_unlock(&state_lock); | |
3830 | ||
3831 | return fp; | |
3832 | } | |
3833 | ||
1da177e4 LT |
3834 | /* |
3835 | * Called to check deny when READ with all zero stateid or | |
3836 | * WRITE with all zero or all one stateid | |
3837 | */ | |
b37ad28b | 3838 | static __be32 |
1da177e4 LT |
3839 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
3840 | { | |
1da177e4 | 3841 | struct nfs4_file *fp; |
baeb4ff0 | 3842 | __be32 ret = nfs_ok; |
1da177e4 | 3843 | |
ca943217 | 3844 | fp = find_file(¤t_fh->fh_handle); |
13cd2184 | 3845 | if (!fp) |
baeb4ff0 JL |
3846 | return ret; |
3847 | /* Check for conflicting share reservations */ | |
1d31a253 | 3848 | spin_lock(&fp->fi_lock); |
baeb4ff0 JL |
3849 | if (fp->fi_share_deny & deny_type) |
3850 | ret = nfserr_locked; | |
1d31a253 | 3851 | spin_unlock(&fp->fi_lock); |
13cd2184 N |
3852 | put_nfs4_file(fp); |
3853 | return ret; | |
1da177e4 LT |
3854 | } |
3855 | ||
0162ac2b | 3856 | static void nfsd4_cb_recall_prepare(struct nfsd4_callback *cb) |
1da177e4 | 3857 | { |
0162ac2b | 3858 | struct nfs4_delegation *dp = cb_to_delegation(cb); |
11b9164a TM |
3859 | struct nfsd_net *nn = net_generic(dp->dl_stid.sc_client->net, |
3860 | nfsd_net_id); | |
e8c69d17 | 3861 | |
11b9164a | 3862 | block_delegations(&dp->dl_stid.sc_file->fi_fhandle); |
f54fe962 | 3863 | |
dff1399f | 3864 | /* |
f54fe962 JL |
3865 | * We can't do this in nfsd_break_deleg_cb because it is |
3866 | * already holding inode->i_lock. | |
3867 | * | |
dff1399f JL |
3868 | * If the dl_time != 0, then we know that it has already been |
3869 | * queued for a lease break. Don't queue it again. | |
3870 | */ | |
f54fe962 | 3871 | spin_lock(&state_lock); |
dff1399f | 3872 | if (dp->dl_time == 0) { |
dff1399f | 3873 | dp->dl_time = get_seconds(); |
02e1215f | 3874 | list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru); |
dff1399f | 3875 | } |
02e1215f JL |
3876 | spin_unlock(&state_lock); |
3877 | } | |
1da177e4 | 3878 | |
0162ac2b CH |
3879 | static int nfsd4_cb_recall_done(struct nfsd4_callback *cb, |
3880 | struct rpc_task *task) | |
3881 | { | |
3882 | struct nfs4_delegation *dp = cb_to_delegation(cb); | |
3883 | ||
a457974f AE |
3884 | if (dp->dl_stid.sc_type == NFS4_CLOSED_DELEG_STID) |
3885 | return 1; | |
3886 | ||
0162ac2b CH |
3887 | switch (task->tk_status) { |
3888 | case 0: | |
3889 | return 1; | |
3890 | case -EBADHANDLE: | |
3891 | case -NFS4ERR_BAD_STATEID: | |
3892 | /* | |
3893 | * Race: client probably got cb_recall before open reply | |
3894 | * granting delegation. | |
3895 | */ | |
3896 | if (dp->dl_retries--) { | |
3897 | rpc_delay(task, 2 * HZ); | |
3898 | return 0; | |
3899 | } | |
3900 | /*FALLTHRU*/ | |
3901 | default: | |
3902 | return -1; | |
3903 | } | |
3904 | } | |
3905 | ||
3906 | static void nfsd4_cb_recall_release(struct nfsd4_callback *cb) | |
3907 | { | |
3908 | struct nfs4_delegation *dp = cb_to_delegation(cb); | |
3909 | ||
3910 | nfs4_put_stid(&dp->dl_stid); | |
3911 | } | |
3912 | ||
c4cb8974 | 3913 | static const struct nfsd4_callback_ops nfsd4_cb_recall_ops = { |
0162ac2b CH |
3914 | .prepare = nfsd4_cb_recall_prepare, |
3915 | .done = nfsd4_cb_recall_done, | |
3916 | .release = nfsd4_cb_recall_release, | |
3917 | }; | |
3918 | ||
02e1215f JL |
3919 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
3920 | { | |
3921 | /* | |
3922 | * We're assuming the state code never drops its reference | |
3923 | * without first removing the lease. Since we're in this lease | |
3924 | * callback (and since the lease code is serialized by the kernel | |
3925 | * lock) we know the server hasn't removed the lease yet, we know | |
3926 | * it's safe to take a reference. | |
3927 | */ | |
72c0b0fb | 3928 | atomic_inc(&dp->dl_stid.sc_count); |
f0b5de1b | 3929 | nfsd4_run_cb(&dp->dl_recall); |
6b57d9c8 BF |
3930 | } |
3931 | ||
1c8c601a | 3932 | /* Called from break_lease() with i_lock held. */ |
4d01b7f5 JL |
3933 | static bool |
3934 | nfsd_break_deleg_cb(struct file_lock *fl) | |
6b57d9c8 | 3935 | { |
4d01b7f5 | 3936 | bool ret = false; |
acfdf5c3 BF |
3937 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
3938 | struct nfs4_delegation *dp; | |
6b57d9c8 | 3939 | |
7fa10cd1 BF |
3940 | if (!fp) { |
3941 | WARN(1, "(%p)->fl_owner NULL\n", fl); | |
4d01b7f5 | 3942 | return ret; |
7fa10cd1 BF |
3943 | } |
3944 | if (fp->fi_had_conflict) { | |
3945 | WARN(1, "duplicate break on %p\n", fp); | |
4d01b7f5 | 3946 | return ret; |
7fa10cd1 | 3947 | } |
0272e1fd BF |
3948 | /* |
3949 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 3950 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 3951 | * in time: |
0272e1fd BF |
3952 | */ |
3953 | fl->fl_break_time = 0; | |
1da177e4 | 3954 | |
02e1215f | 3955 | spin_lock(&fp->fi_lock); |
417c6629 JL |
3956 | fp->fi_had_conflict = true; |
3957 | /* | |
4d01b7f5 JL |
3958 | * If there are no delegations on the list, then return true |
3959 | * so that the lease code will go ahead and delete it. | |
417c6629 JL |
3960 | */ |
3961 | if (list_empty(&fp->fi_delegations)) | |
4d01b7f5 | 3962 | ret = true; |
417c6629 JL |
3963 | else |
3964 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
3965 | nfsd_break_one_deleg(dp); | |
02e1215f | 3966 | spin_unlock(&fp->fi_lock); |
4d01b7f5 | 3967 | return ret; |
1da177e4 LT |
3968 | } |
3969 | ||
c45198ed | 3970 | static int |
7448cc37 JL |
3971 | nfsd_change_deleg_cb(struct file_lock *onlist, int arg, |
3972 | struct list_head *dispose) | |
1da177e4 LT |
3973 | { |
3974 | if (arg & F_UNLCK) | |
c45198ed | 3975 | return lease_modify(onlist, arg, dispose); |
1da177e4 LT |
3976 | else |
3977 | return -EAGAIN; | |
3978 | } | |
3979 | ||
7b021967 | 3980 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
3981 | .lm_break = nfsd_break_deleg_cb, |
3982 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
3983 | }; |
3984 | ||
7a8711c9 BF |
3985 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
3986 | { | |
3987 | if (nfsd4_has_session(cstate)) | |
3988 | return nfs_ok; | |
3989 | if (seqid == so->so_seqid - 1) | |
3990 | return nfserr_replay_me; | |
3991 | if (seqid == so->so_seqid) | |
3992 | return nfs_ok; | |
3993 | return nfserr_bad_seqid; | |
3994 | } | |
1da177e4 | 3995 | |
4b24ca7d JL |
3996 | static __be32 lookup_clientid(clientid_t *clid, |
3997 | struct nfsd4_compound_state *cstate, | |
3998 | struct nfsd_net *nn) | |
3999 | { | |
4000 | struct nfs4_client *found; | |
4001 | ||
4002 | if (cstate->clp) { | |
4003 | found = cstate->clp; | |
4004 | if (!same_clid(&found->cl_clientid, clid)) | |
4005 | return nfserr_stale_clientid; | |
4006 | return nfs_ok; | |
4007 | } | |
4008 | ||
4009 | if (STALE_CLIENTID(clid, nn)) | |
4010 | return nfserr_stale_clientid; | |
4011 | ||
4012 | /* | |
4013 | * For v4.1+ we get the client in the SEQUENCE op. If we don't have one | |
4014 | * cached already then we know this is for is for v4.0 and "sessions" | |
4015 | * will be false. | |
4016 | */ | |
4017 | WARN_ON_ONCE(cstate->session); | |
3e339f96 | 4018 | spin_lock(&nn->client_lock); |
4b24ca7d | 4019 | found = find_confirmed_client(clid, false, nn); |
3e339f96 TM |
4020 | if (!found) { |
4021 | spin_unlock(&nn->client_lock); | |
4b24ca7d | 4022 | return nfserr_expired; |
3e339f96 TM |
4023 | } |
4024 | atomic_inc(&found->cl_refcount); | |
4025 | spin_unlock(&nn->client_lock); | |
4b24ca7d JL |
4026 | |
4027 | /* Cache the nfs4_client in cstate! */ | |
4028 | cstate->clp = found; | |
4b24ca7d JL |
4029 | return nfs_ok; |
4030 | } | |
4031 | ||
b37ad28b | 4032 | __be32 |
6668958f | 4033 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
3320fef1 | 4034 | struct nfsd4_open *open, struct nfsd_net *nn) |
1da177e4 | 4035 | { |
1da177e4 LT |
4036 | clientid_t *clientid = &open->op_clientid; |
4037 | struct nfs4_client *clp = NULL; | |
4038 | unsigned int strhashval; | |
fe0750e5 | 4039 | struct nfs4_openowner *oo = NULL; |
4cdc951b | 4040 | __be32 status; |
1da177e4 | 4041 | |
2c142baa | 4042 | if (STALE_CLIENTID(&open->op_clientid, nn)) |
1da177e4 | 4043 | return nfserr_stale_clientid; |
32513b40 BF |
4044 | /* |
4045 | * In case we need it later, after we've already created the | |
4046 | * file and don't want to risk a further failure: | |
4047 | */ | |
4048 | open->op_file = nfsd4_alloc_file(); | |
4049 | if (open->op_file == NULL) | |
4050 | return nfserr_jukebox; | |
1da177e4 | 4051 | |
2d91e895 TM |
4052 | status = lookup_clientid(clientid, cstate, nn); |
4053 | if (status) | |
4054 | return status; | |
4055 | clp = cstate->clp; | |
4056 | ||
d4f0489f TM |
4057 | strhashval = ownerstr_hashval(&open->op_owner); |
4058 | oo = find_openstateowner_str(strhashval, open, clp); | |
fe0750e5 BF |
4059 | open->op_openowner = oo; |
4060 | if (!oo) { | |
bcf130f9 | 4061 | goto new_owner; |
1da177e4 | 4062 | } |
dad1c067 | 4063 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
0f442aa2 | 4064 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
4065 | release_openowner(oo); |
4066 | open->op_openowner = NULL; | |
bcf130f9 | 4067 | goto new_owner; |
0f442aa2 | 4068 | } |
4cdc951b BF |
4069 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
4070 | if (status) | |
4071 | return status; | |
4cdc951b | 4072 | goto alloc_stateid; |
bcf130f9 | 4073 | new_owner: |
13d6f66b | 4074 | oo = alloc_init_open_stateowner(strhashval, open, cstate); |
bcf130f9 BF |
4075 | if (oo == NULL) |
4076 | return nfserr_jukebox; | |
4077 | open->op_openowner = oo; | |
4cdc951b | 4078 | alloc_stateid: |
b49e084d | 4079 | open->op_stp = nfs4_alloc_open_stateid(clp); |
4cdc951b BF |
4080 | if (!open->op_stp) |
4081 | return nfserr_jukebox; | |
8287f009 SB |
4082 | |
4083 | if (nfsd4_has_session(cstate) && | |
4084 | (cstate->current_fh.fh_export->ex_flags & NFSEXP_PNFS)) { | |
4085 | open->op_odstate = alloc_clnt_odstate(clp); | |
4086 | if (!open->op_odstate) | |
4087 | return nfserr_jukebox; | |
4088 | } | |
4089 | ||
0f442aa2 | 4090 | return nfs_ok; |
1da177e4 LT |
4091 | } |
4092 | ||
b37ad28b | 4093 | static inline __be32 |
4a6e43e6 N |
4094 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
4095 | { | |
4096 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
4097 | return nfserr_openmode; | |
4098 | else | |
4099 | return nfs_ok; | |
4100 | } | |
4101 | ||
f459e453 | 4102 | static int share_access_to_flags(u32 share_access) |
52f4fb43 | 4103 | { |
f459e453 | 4104 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
52f4fb43 N |
4105 | } |
4106 | ||
38c2f4b1 | 4107 | static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) |
24a0111e | 4108 | { |
f459e453 | 4109 | struct nfs4_stid *ret; |
24a0111e | 4110 | |
584f0bb5 AE |
4111 | ret = find_stateid_by_type(cl, s, |
4112 | NFS4_DELEG_STID|NFS4_REVOKED_DELEG_STID); | |
f459e453 BF |
4113 | if (!ret) |
4114 | return NULL; | |
4115 | return delegstateid(ret); | |
24a0111e BF |
4116 | } |
4117 | ||
8b289b2c BF |
4118 | static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) |
4119 | { | |
4120 | return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || | |
4121 | open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; | |
4122 | } | |
4123 | ||
b37ad28b | 4124 | static __be32 |
41d22663 | 4125 | nfs4_check_deleg(struct nfs4_client *cl, struct nfsd4_open *open, |
567d9829 N |
4126 | struct nfs4_delegation **dp) |
4127 | { | |
4128 | int flags; | |
b37ad28b | 4129 | __be32 status = nfserr_bad_stateid; |
dcd94cc2 | 4130 | struct nfs4_delegation *deleg; |
567d9829 | 4131 | |
dcd94cc2 TM |
4132 | deleg = find_deleg_stateid(cl, &open->op_delegate_stateid); |
4133 | if (deleg == NULL) | |
c44c5eeb | 4134 | goto out; |
584f0bb5 AE |
4135 | if (deleg->dl_stid.sc_type == NFS4_REVOKED_DELEG_STID) { |
4136 | nfs4_put_stid(&deleg->dl_stid); | |
4137 | if (cl->cl_minorversion) | |
4138 | status = nfserr_deleg_revoked; | |
4139 | goto out; | |
4140 | } | |
24a0111e | 4141 | flags = share_access_to_flags(open->op_share_access); |
dcd94cc2 TM |
4142 | status = nfs4_check_delegmode(deleg, flags); |
4143 | if (status) { | |
4144 | nfs4_put_stid(&deleg->dl_stid); | |
4145 | goto out; | |
4146 | } | |
4147 | *dp = deleg; | |
c44c5eeb | 4148 | out: |
8b289b2c | 4149 | if (!nfsd4_is_deleg_cur(open)) |
c44c5eeb N |
4150 | return nfs_ok; |
4151 | if (status) | |
4152 | return status; | |
dad1c067 | 4153 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
c44c5eeb | 4154 | return nfs_ok; |
567d9829 N |
4155 | } |
4156 | ||
21fb4016 BF |
4157 | static inline int nfs4_access_to_access(u32 nfs4_access) |
4158 | { | |
4159 | int flags = 0; | |
4160 | ||
4161 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
4162 | flags |= NFSD_MAY_READ; | |
4163 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
4164 | flags |= NFSD_MAY_WRITE; | |
4165 | return flags; | |
4166 | } | |
4167 | ||
7e6a72e5 CH |
4168 | static inline __be32 |
4169 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, | |
4170 | struct nfsd4_open *open) | |
4171 | { | |
4172 | struct iattr iattr = { | |
4173 | .ia_valid = ATTR_SIZE, | |
4174 | .ia_size = 0, | |
4175 | }; | |
4176 | if (!open->op_truncate) | |
4177 | return 0; | |
4178 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
4179 | return nfserr_inval; | |
4180 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); | |
4181 | } | |
4182 | ||
0c12eaff | 4183 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
6eb3a1d0 JL |
4184 | struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp, |
4185 | struct nfsd4_open *open) | |
f9d7562f | 4186 | { |
de18643d | 4187 | struct file *filp = NULL; |
f9d7562f | 4188 | __be32 status; |
0c12eaff CB |
4189 | int oflag = nfs4_access_to_omode(open->op_share_access); |
4190 | int access = nfs4_access_to_access(open->op_share_access); | |
baeb4ff0 | 4191 | unsigned char old_access_bmap, old_deny_bmap; |
0c12eaff | 4192 | |
de18643d | 4193 | spin_lock(&fp->fi_lock); |
baeb4ff0 JL |
4194 | |
4195 | /* | |
4196 | * Are we trying to set a deny mode that would conflict with | |
4197 | * current access? | |
4198 | */ | |
4199 | status = nfs4_file_check_deny(fp, open->op_share_deny); | |
4200 | if (status != nfs_ok) { | |
4201 | spin_unlock(&fp->fi_lock); | |
4202 | goto out; | |
4203 | } | |
4204 | ||
4205 | /* set access to the file */ | |
4206 | status = nfs4_file_get_access(fp, open->op_share_access); | |
4207 | if (status != nfs_ok) { | |
4208 | spin_unlock(&fp->fi_lock); | |
4209 | goto out; | |
4210 | } | |
4211 | ||
4212 | /* Set access bits in stateid */ | |
4213 | old_access_bmap = stp->st_access_bmap; | |
4214 | set_access(open->op_share_access, stp); | |
4215 | ||
4216 | /* Set new deny mask */ | |
4217 | old_deny_bmap = stp->st_deny_bmap; | |
4218 | set_deny(open->op_share_deny, stp); | |
4219 | fp->fi_share_deny |= (open->op_share_deny & NFS4_SHARE_DENY_BOTH); | |
4220 | ||
f9d7562f | 4221 | if (!fp->fi_fds[oflag]) { |
de18643d TM |
4222 | spin_unlock(&fp->fi_lock); |
4223 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, &filp); | |
f9d7562f | 4224 | if (status) |
baeb4ff0 | 4225 | goto out_put_access; |
de18643d TM |
4226 | spin_lock(&fp->fi_lock); |
4227 | if (!fp->fi_fds[oflag]) { | |
4228 | fp->fi_fds[oflag] = filp; | |
4229 | filp = NULL; | |
4230 | } | |
f9d7562f | 4231 | } |
de18643d TM |
4232 | spin_unlock(&fp->fi_lock); |
4233 | if (filp) | |
4234 | fput(filp); | |
f9d7562f | 4235 | |
7e6a72e5 CH |
4236 | status = nfsd4_truncate(rqstp, cur_fh, open); |
4237 | if (status) | |
4238 | goto out_put_access; | |
7e6a72e5 CH |
4239 | out: |
4240 | return status; | |
baeb4ff0 JL |
4241 | out_put_access: |
4242 | stp->st_access_bmap = old_access_bmap; | |
4243 | nfs4_file_put_access(fp, open->op_share_access); | |
4244 | reset_union_bmap_deny(bmap_to_share_mode(old_deny_bmap), stp); | |
4245 | goto out; | |
1da177e4 LT |
4246 | } |
4247 | ||
b37ad28b | 4248 | static __be32 |
dcef0413 | 4249 | nfs4_upgrade_open(struct svc_rqst *rqstp, struct nfs4_file *fp, struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp, struct nfsd4_open *open) |
1da177e4 | 4250 | { |
b37ad28b | 4251 | __be32 status; |
6ac75368 | 4252 | unsigned char old_deny_bmap = stp->st_deny_bmap; |
1da177e4 | 4253 | |
6eb3a1d0 | 4254 | if (!test_access(open->op_share_access, stp)) |
baeb4ff0 | 4255 | return nfs4_get_vfs_file(rqstp, fp, cur_fh, stp, open); |
7e6a72e5 | 4256 | |
baeb4ff0 JL |
4257 | /* test and set deny mode */ |
4258 | spin_lock(&fp->fi_lock); | |
4259 | status = nfs4_file_check_deny(fp, open->op_share_deny); | |
4260 | if (status == nfs_ok) { | |
baeb4ff0 JL |
4261 | set_deny(open->op_share_deny, stp); |
4262 | fp->fi_share_deny |= | |
4263 | (open->op_share_deny & NFS4_SHARE_DENY_BOTH); | |
4264 | } | |
4265 | spin_unlock(&fp->fi_lock); | |
4266 | ||
4267 | if (status != nfs_ok) | |
1da177e4 | 4268 | return status; |
1da177e4 | 4269 | |
baeb4ff0 JL |
4270 | status = nfsd4_truncate(rqstp, cur_fh, open); |
4271 | if (status != nfs_ok) | |
4272 | reset_union_bmap_deny(old_deny_bmap, stp); | |
4273 | return status; | |
4274 | } | |
1da177e4 | 4275 | |
14a24e99 BF |
4276 | /* Should we give out recallable state?: */ |
4277 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
4278 | { | |
4279 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
4280 | return true; | |
4281 | /* | |
4282 | * In the sessions case, since we don't have to establish a | |
4283 | * separate connection for callbacks, we assume it's OK | |
4284 | * until we hear otherwise: | |
4285 | */ | |
4286 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
4287 | } | |
4288 | ||
d564fbec | 4289 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_file *fp, int flag) |
22d38c4c BF |
4290 | { |
4291 | struct file_lock *fl; | |
4292 | ||
4293 | fl = locks_alloc_lock(); | |
4294 | if (!fl) | |
4295 | return NULL; | |
22d38c4c | 4296 | fl->fl_lmops = &nfsd_lease_mng_ops; |
617588d5 | 4297 | fl->fl_flags = FL_DELEG; |
22d38c4c BF |
4298 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; |
4299 | fl->fl_end = OFFSET_MAX; | |
d564fbec | 4300 | fl->fl_owner = (fl_owner_t)fp; |
22d38c4c | 4301 | fl->fl_pid = current->tgid; |
22d38c4c BF |
4302 | return fl; |
4303 | } | |
4304 | ||
34ed9872 AE |
4305 | /** |
4306 | * nfs4_setlease - Obtain a delegation by requesting lease from vfs layer | |
4307 | * @dp: a pointer to the nfs4_delegation we're adding. | |
4308 | * | |
4309 | * Return: | |
4310 | * On success: Return code will be 0 on success. | |
4311 | * | |
4312 | * On error: -EAGAIN if there was an existing delegation. | |
4313 | * nonzero if there is an error in other cases. | |
4314 | * | |
4315 | */ | |
4316 | ||
99c41515 | 4317 | static int nfs4_setlease(struct nfs4_delegation *dp) |
edab9782 | 4318 | { |
11b9164a | 4319 | struct nfs4_file *fp = dp->dl_stid.sc_file; |
efde6b4d | 4320 | struct file_lock *fl; |
417c6629 JL |
4321 | struct file *filp; |
4322 | int status = 0; | |
edab9782 | 4323 | |
d564fbec | 4324 | fl = nfs4_alloc_init_lease(fp, NFS4_OPEN_DELEGATE_READ); |
edab9782 BF |
4325 | if (!fl) |
4326 | return -ENOMEM; | |
417c6629 JL |
4327 | filp = find_readable_file(fp); |
4328 | if (!filp) { | |
4329 | /* We should always have a readable file here */ | |
4330 | WARN_ON_ONCE(1); | |
af9dbaf4 | 4331 | locks_free_lock(fl); |
417c6629 JL |
4332 | return -EBADF; |
4333 | } | |
4334 | fl->fl_file = filp; | |
e6f5c789 | 4335 | status = vfs_setlease(filp, fl->fl_type, &fl, NULL); |
1c7dd2ff | 4336 | if (fl) |
417c6629 | 4337 | locks_free_lock(fl); |
1c7dd2ff | 4338 | if (status) |
417c6629 | 4339 | goto out_fput; |
417c6629 JL |
4340 | spin_lock(&state_lock); |
4341 | spin_lock(&fp->fi_lock); | |
4342 | /* Did the lease get broken before we took the lock? */ | |
4343 | status = -EAGAIN; | |
4344 | if (fp->fi_had_conflict) | |
4345 | goto out_unlock; | |
4346 | /* Race breaker */ | |
0c637be8 | 4347 | if (fp->fi_deleg_file) { |
34ed9872 | 4348 | status = hash_delegation_locked(dp, fp); |
417c6629 JL |
4349 | goto out_unlock; |
4350 | } | |
417c6629 | 4351 | fp->fi_deleg_file = filp; |
34ed9872 AE |
4352 | fp->fi_delegees = 0; |
4353 | status = hash_delegation_locked(dp, fp); | |
417c6629 | 4354 | spin_unlock(&fp->fi_lock); |
cdc97505 | 4355 | spin_unlock(&state_lock); |
34ed9872 AE |
4356 | if (status) { |
4357 | /* Should never happen, this is a new fi_deleg_file */ | |
4358 | WARN_ON_ONCE(1); | |
4359 | goto out_fput; | |
4360 | } | |
acfdf5c3 | 4361 | return 0; |
417c6629 JL |
4362 | out_unlock: |
4363 | spin_unlock(&fp->fi_lock); | |
4364 | spin_unlock(&state_lock); | |
4365 | out_fput: | |
4366 | fput(filp); | |
e873088f | 4367 | return status; |
acfdf5c3 BF |
4368 | } |
4369 | ||
0b26693c JL |
4370 | static struct nfs4_delegation * |
4371 | nfs4_set_delegation(struct nfs4_client *clp, struct svc_fh *fh, | |
8287f009 | 4372 | struct nfs4_file *fp, struct nfs4_clnt_odstate *odstate) |
acfdf5c3 | 4373 | { |
0b26693c JL |
4374 | int status; |
4375 | struct nfs4_delegation *dp; | |
417c6629 | 4376 | |
bf7bd3e9 | 4377 | if (fp->fi_had_conflict) |
0b26693c JL |
4378 | return ERR_PTR(-EAGAIN); |
4379 | ||
34ed9872 AE |
4380 | spin_lock(&state_lock); |
4381 | spin_lock(&fp->fi_lock); | |
4382 | status = nfs4_get_existing_delegation(clp, fp); | |
4383 | spin_unlock(&fp->fi_lock); | |
4384 | spin_unlock(&state_lock); | |
4385 | ||
4386 | if (status) | |
4387 | return ERR_PTR(status); | |
4388 | ||
8287f009 | 4389 | dp = alloc_init_deleg(clp, fh, odstate); |
0b26693c JL |
4390 | if (!dp) |
4391 | return ERR_PTR(-ENOMEM); | |
4392 | ||
bf7bd3e9 | 4393 | get_nfs4_file(fp); |
417c6629 JL |
4394 | spin_lock(&state_lock); |
4395 | spin_lock(&fp->fi_lock); | |
11b9164a | 4396 | dp->dl_stid.sc_file = fp; |
0c637be8 | 4397 | if (!fp->fi_deleg_file) { |
417c6629 JL |
4398 | spin_unlock(&fp->fi_lock); |
4399 | spin_unlock(&state_lock); | |
0b26693c JL |
4400 | status = nfs4_setlease(dp); |
4401 | goto out; | |
417c6629 | 4402 | } |
acfdf5c3 | 4403 | if (fp->fi_had_conflict) { |
417c6629 JL |
4404 | status = -EAGAIN; |
4405 | goto out_unlock; | |
acfdf5c3 | 4406 | } |
34ed9872 | 4407 | status = hash_delegation_locked(dp, fp); |
417c6629 JL |
4408 | out_unlock: |
4409 | spin_unlock(&fp->fi_lock); | |
cdc97505 | 4410 | spin_unlock(&state_lock); |
0b26693c JL |
4411 | out: |
4412 | if (status) { | |
8287f009 | 4413 | put_clnt_odstate(dp->dl_clnt_odstate); |
6011695d | 4414 | nfs4_put_stid(&dp->dl_stid); |
0b26693c JL |
4415 | return ERR_PTR(status); |
4416 | } | |
4417 | return dp; | |
edab9782 BF |
4418 | } |
4419 | ||
4aa8913c BH |
4420 | static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) |
4421 | { | |
4422 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
4423 | if (status == -EAGAIN) | |
4424 | open->op_why_no_deleg = WND4_CONTENTION; | |
4425 | else { | |
4426 | open->op_why_no_deleg = WND4_RESOURCE; | |
4427 | switch (open->op_deleg_want) { | |
4428 | case NFS4_SHARE_WANT_READ_DELEG: | |
4429 | case NFS4_SHARE_WANT_WRITE_DELEG: | |
4430 | case NFS4_SHARE_WANT_ANY_DELEG: | |
4431 | break; | |
4432 | case NFS4_SHARE_WANT_CANCEL: | |
4433 | open->op_why_no_deleg = WND4_CANCELLED; | |
4434 | break; | |
4435 | case NFS4_SHARE_WANT_NO_DELEG: | |
063b0fb9 | 4436 | WARN_ON_ONCE(1); |
4aa8913c BH |
4437 | } |
4438 | } | |
4439 | } | |
4440 | ||
1da177e4 LT |
4441 | /* |
4442 | * Attempt to hand out a delegation. | |
99c41515 BF |
4443 | * |
4444 | * Note we don't support write delegations, and won't until the vfs has | |
4445 | * proper support for them. | |
1da177e4 LT |
4446 | */ |
4447 | static void | |
4cf59221 JL |
4448 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, |
4449 | struct nfs4_ol_stateid *stp) | |
1da177e4 LT |
4450 | { |
4451 | struct nfs4_delegation *dp; | |
4cf59221 JL |
4452 | struct nfs4_openowner *oo = openowner(stp->st_stateowner); |
4453 | struct nfs4_client *clp = stp->st_stid.sc_client; | |
14a24e99 | 4454 | int cb_up; |
99c41515 | 4455 | int status = 0; |
1da177e4 | 4456 | |
fe0750e5 | 4457 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
7b190fec N |
4458 | open->op_recall = 0; |
4459 | switch (open->op_claim_type) { | |
4460 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 4461 | if (!cb_up) |
7b190fec | 4462 | open->op_recall = 1; |
99c41515 BF |
4463 | if (open->op_delegate_type != NFS4_OPEN_DELEGATE_READ) |
4464 | goto out_no_deleg; | |
7b190fec N |
4465 | break; |
4466 | case NFS4_OPEN_CLAIM_NULL: | |
ed47b062 | 4467 | case NFS4_OPEN_CLAIM_FH: |
99c41515 BF |
4468 | /* |
4469 | * Let's not give out any delegations till everyone's | |
c87fb4a3 BF |
4470 | * had the chance to reclaim theirs, *and* until |
4471 | * NLM locks have all been reclaimed: | |
99c41515 | 4472 | */ |
4cf59221 | 4473 | if (locks_in_grace(clp->net)) |
99c41515 | 4474 | goto out_no_deleg; |
dad1c067 | 4475 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
99c41515 | 4476 | goto out_no_deleg; |
9a0590ae SD |
4477 | /* |
4478 | * Also, if the file was opened for write or | |
4479 | * create, there's a good chance the client's | |
4480 | * about to write to it, resulting in an | |
4481 | * immediate recall (since we don't support | |
4482 | * write delegations): | |
4483 | */ | |
7b190fec | 4484 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
99c41515 BF |
4485 | goto out_no_deleg; |
4486 | if (open->op_create == NFS4_OPEN_CREATE) | |
4487 | goto out_no_deleg; | |
7b190fec N |
4488 | break; |
4489 | default: | |
99c41515 | 4490 | goto out_no_deleg; |
7b190fec | 4491 | } |
8287f009 | 4492 | dp = nfs4_set_delegation(clp, fh, stp->st_stid.sc_file, stp->st_clnt_odstate); |
0b26693c | 4493 | if (IS_ERR(dp)) |
dd239cc0 | 4494 | goto out_no_deleg; |
1da177e4 | 4495 | |
d5477a8d | 4496 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 4497 | |
8c10cbdb | 4498 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
d5477a8d | 4499 | STATEID_VAL(&dp->dl_stid.sc_stateid)); |
99c41515 | 4500 | open->op_delegate_type = NFS4_OPEN_DELEGATE_READ; |
67cb1279 | 4501 | nfs4_put_stid(&dp->dl_stid); |
dd239cc0 | 4502 | return; |
dd239cc0 | 4503 | out_no_deleg: |
99c41515 BF |
4504 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE; |
4505 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && | |
d08d32e6 | 4506 | open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) { |
99c41515 | 4507 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
d08d32e6 BF |
4508 | open->op_recall = 1; |
4509 | } | |
99c41515 BF |
4510 | |
4511 | /* 4.1 client asking for a delegation? */ | |
4512 | if (open->op_deleg_want) | |
4513 | nfsd4_open_deleg_none_ext(open, status); | |
4514 | return; | |
1da177e4 LT |
4515 | } |
4516 | ||
e27f49c3 BH |
4517 | static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, |
4518 | struct nfs4_delegation *dp) | |
4519 | { | |
4520 | if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && | |
4521 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
4522 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
4523 | open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; | |
4524 | } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && | |
4525 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
4526 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
4527 | open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; | |
4528 | } | |
4529 | /* Otherwise the client must be confused wanting a delegation | |
4530 | * it already has, therefore we don't return | |
4531 | * NFS4_OPEN_DELEGATE_NONE_EXT and reason. | |
4532 | */ | |
4533 | } | |
4534 | ||
b37ad28b | 4535 | __be32 |
1da177e4 LT |
4536 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
4537 | { | |
6668958f | 4538 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
38c2f4b1 | 4539 | struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; |
1da177e4 | 4540 | struct nfs4_file *fp = NULL; |
dcef0413 | 4541 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 4542 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 4543 | __be32 status; |
73cfeab6 | 4544 | bool new_stp = false; |
1da177e4 | 4545 | |
1da177e4 LT |
4546 | /* |
4547 | * Lookup file; if found, lookup stateid and check open request, | |
4548 | * and check for delegations in the process of being recalled. | |
4549 | * If not found, create the nfs4_file struct | |
4550 | */ | |
f9c00c3a | 4551 | fp = find_or_add_file(open->op_file, ¤t_fh->fh_handle); |
950e0118 | 4552 | if (fp != open->op_file) { |
41d22663 | 4553 | status = nfs4_check_deleg(cl, open, &dp); |
c44c5eeb N |
4554 | if (status) |
4555 | goto out; | |
db77ab54 | 4556 | stp = nfsd4_find_and_lock_existing_open(fp, open); |
1da177e4 | 4557 | } else { |
950e0118 | 4558 | open->op_file = NULL; |
c44c5eeb | 4559 | status = nfserr_bad_stateid; |
8b289b2c | 4560 | if (nfsd4_is_deleg_cur(open)) |
c44c5eeb | 4561 | goto out; |
1da177e4 LT |
4562 | } |
4563 | ||
73cfeab6 TM |
4564 | if (!stp) { |
4565 | stp = init_open_stateid(fp, open); | |
4566 | if (!open->op_stp) | |
4567 | new_stp = true; | |
4568 | } | |
4569 | ||
1da177e4 LT |
4570 | /* |
4571 | * OPEN the file, or upgrade an existing OPEN. | |
4572 | * If truncate fails, the OPEN fails. | |
73cfeab6 TM |
4573 | * |
4574 | * stp is already locked. | |
1da177e4 | 4575 | */ |
73cfeab6 | 4576 | if (!new_stp) { |
1da177e4 | 4577 | /* Stateid was found, this is an OPEN upgrade */ |
f9d7562f | 4578 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
35a92fe8 | 4579 | if (status) { |
feb9dad5 | 4580 | mutex_unlock(&stp->st_mutex); |
1da177e4 | 4581 | goto out; |
35a92fe8 | 4582 | } |
1da177e4 | 4583 | } else { |
6eb3a1d0 JL |
4584 | status = nfs4_get_vfs_file(rqstp, fp, current_fh, stp, open); |
4585 | if (status) { | |
73cfeab6 | 4586 | stp->st_stid.sc_type = NFS4_CLOSED_STID; |
6eb3a1d0 | 4587 | release_open_stateid(stp); |
73cfeab6 | 4588 | mutex_unlock(&stp->st_mutex); |
6eb3a1d0 JL |
4589 | goto out; |
4590 | } | |
8287f009 SB |
4591 | |
4592 | stp->st_clnt_odstate = find_or_hash_clnt_odstate(fp, | |
4593 | open->op_odstate); | |
4594 | if (stp->st_clnt_odstate == open->op_odstate) | |
4595 | open->op_odstate = NULL; | |
1da177e4 | 4596 | } |
73cfeab6 | 4597 | |
9767feb2 | 4598 | nfs4_inc_and_copy_stateid(&open->op_stateid, &stp->st_stid); |
feb9dad5 | 4599 | mutex_unlock(&stp->st_mutex); |
1da177e4 | 4600 | |
d24433cd | 4601 | if (nfsd4_has_session(&resp->cstate)) { |
d24433cd BH |
4602 | if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { |
4603 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
4604 | open->op_why_no_deleg = WND4_NOT_WANTED; | |
4605 | goto nodeleg; | |
4606 | } | |
4607 | } | |
4608 | ||
1da177e4 LT |
4609 | /* |
4610 | * Attempt to hand out a delegation. No error return, because the | |
4611 | * OPEN succeeds even if we fail. | |
4612 | */ | |
4cf59221 | 4613 | nfs4_open_delegation(current_fh, open, stp); |
d24433cd | 4614 | nodeleg: |
1da177e4 LT |
4615 | status = nfs_ok; |
4616 | ||
8c10cbdb | 4617 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
dcef0413 | 4618 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
1da177e4 | 4619 | out: |
d24433cd BH |
4620 | /* 4.1 client trying to upgrade/downgrade delegation? */ |
4621 | if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && | |
e27f49c3 BH |
4622 | open->op_deleg_want) |
4623 | nfsd4_deleg_xgrade_none_ext(open, dp); | |
d24433cd | 4624 | |
13cd2184 N |
4625 | if (fp) |
4626 | put_nfs4_file(fp); | |
37515177 | 4627 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
87186022 | 4628 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
1da177e4 LT |
4629 | /* |
4630 | * To finish the open response, we just need to set the rflags. | |
4631 | */ | |
4632 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
19e4c347 JL |
4633 | if (nfsd4_has_session(&resp->cstate)) |
4634 | open->op_rflags |= NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK; | |
4635 | else if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED)) | |
1da177e4 | 4636 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
19e4c347 | 4637 | |
dcd94cc2 TM |
4638 | if (dp) |
4639 | nfs4_put_stid(&dp->dl_stid); | |
d6f2bc5d TM |
4640 | if (stp) |
4641 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 LT |
4642 | |
4643 | return status; | |
4644 | } | |
4645 | ||
58fb12e6 | 4646 | void nfsd4_cleanup_open_state(struct nfsd4_compound_state *cstate, |
42297899 | 4647 | struct nfsd4_open *open) |
d29b20cd BF |
4648 | { |
4649 | if (open->op_openowner) { | |
d3134b10 JL |
4650 | struct nfs4_stateowner *so = &open->op_openowner->oo_owner; |
4651 | ||
4652 | nfsd4_cstate_assign_replay(cstate, so); | |
4653 | nfs4_put_stateowner(so); | |
d29b20cd | 4654 | } |
32513b40 | 4655 | if (open->op_file) |
5b095e99 | 4656 | kmem_cache_free(file_slab, open->op_file); |
4cdc951b | 4657 | if (open->op_stp) |
6011695d | 4658 | nfs4_put_stid(&open->op_stp->st_stid); |
8287f009 SB |
4659 | if (open->op_odstate) |
4660 | kmem_cache_free(odstate_slab, open->op_odstate); | |
d29b20cd BF |
4661 | } |
4662 | ||
b37ad28b | 4663 | __be32 |
b591480b | 4664 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 4665 | union nfsd4_op_u *u) |
1da177e4 | 4666 | { |
eb69853d | 4667 | clientid_t *clid = &u->renew; |
1da177e4 | 4668 | struct nfs4_client *clp; |
b37ad28b | 4669 | __be32 status; |
7f2210fa | 4670 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4671 | |
1da177e4 LT |
4672 | dprintk("process_renew(%08x/%08x): starting\n", |
4673 | clid->cl_boot, clid->cl_id); | |
4b24ca7d | 4674 | status = lookup_clientid(clid, cstate, nn); |
9b2ef62b | 4675 | if (status) |
1da177e4 | 4676 | goto out; |
4b24ca7d | 4677 | clp = cstate->clp; |
1da177e4 | 4678 | status = nfserr_cb_path_down; |
ea1da636 | 4679 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 4680 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
4681 | goto out; |
4682 | status = nfs_ok; | |
4683 | out: | |
1da177e4 LT |
4684 | return status; |
4685 | } | |
4686 | ||
7f5ef2e9 | 4687 | void |
12760c66 | 4688 | nfsd4_end_grace(struct nfsd_net *nn) |
a76b4319 | 4689 | { |
33dcc481 | 4690 | /* do nothing if grace period already ended */ |
a51c84ed | 4691 | if (nn->grace_ended) |
33dcc481 JL |
4692 | return; |
4693 | ||
a76b4319 | 4694 | dprintk("NFSD: end of grace period\n"); |
a51c84ed | 4695 | nn->grace_ended = true; |
70b28235 BF |
4696 | /* |
4697 | * If the server goes down again right now, an NFSv4 | |
4698 | * client will still be allowed to reclaim after it comes back up, | |
4699 | * even if it hasn't yet had a chance to reclaim state this time. | |
4700 | * | |
4701 | */ | |
919b8049 | 4702 | nfsd4_record_grace_done(nn); |
70b28235 BF |
4703 | /* |
4704 | * At this point, NFSv4 clients can still reclaim. But if the | |
4705 | * server crashes, any that have not yet reclaimed will be out | |
4706 | * of luck on the next boot. | |
4707 | * | |
4708 | * (NFSv4.1+ clients are considered to have reclaimed once they | |
4709 | * call RECLAIM_COMPLETE. NFSv4.0 clients are considered to | |
4710 | * have reclaimed after their first OPEN.) | |
4711 | */ | |
5e1533c7 | 4712 | locks_end_grace(&nn->nfsd4_manager); |
70b28235 BF |
4713 | /* |
4714 | * At this point, and once lockd and/or any other containers | |
4715 | * exit their grace period, further reclaims will fail and | |
4716 | * regular locking can resume. | |
4717 | */ | |
a76b4319 N |
4718 | } |
4719 | ||
fd39ca9a | 4720 | static time_t |
09121281 | 4721 | nfs4_laundromat(struct nfsd_net *nn) |
1da177e4 LT |
4722 | { |
4723 | struct nfs4_client *clp; | |
fe0750e5 | 4724 | struct nfs4_openowner *oo; |
1da177e4 | 4725 | struct nfs4_delegation *dp; |
217526e7 | 4726 | struct nfs4_ol_stateid *stp; |
7919d0a2 | 4727 | struct nfsd4_blocked_lock *nbl; |
1da177e4 | 4728 | struct list_head *pos, *next, reaplist; |
3d733711 | 4729 | time_t cutoff = get_seconds() - nn->nfsd4_lease; |
a832e7ae | 4730 | time_t t, new_timeo = nn->nfsd4_lease; |
1da177e4 | 4731 | |
1da177e4 | 4732 | dprintk("NFSD: laundromat service - starting\n"); |
12760c66 | 4733 | nfsd4_end_grace(nn); |
36acb66b | 4734 | INIT_LIST_HEAD(&reaplist); |
c9a49628 | 4735 | spin_lock(&nn->client_lock); |
5ed58bb2 | 4736 | list_for_each_safe(pos, next, &nn->client_lru) { |
1da177e4 LT |
4737 | clp = list_entry(pos, struct nfs4_client, cl_lru); |
4738 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
4739 | t = clp->cl_time - cutoff; | |
a832e7ae | 4740 | new_timeo = min(new_timeo, t); |
1da177e4 LT |
4741 | break; |
4742 | } | |
221a6876 | 4743 | if (mark_client_expired_locked(clp)) { |
d7682988 BH |
4744 | dprintk("NFSD: client in use (clientid %08x)\n", |
4745 | clp->cl_clientid.cl_id); | |
4746 | continue; | |
4747 | } | |
4864af97 | 4748 | list_add(&clp->cl_lru, &reaplist); |
36acb66b | 4749 | } |
c9a49628 | 4750 | spin_unlock(&nn->client_lock); |
36acb66b BH |
4751 | list_for_each_safe(pos, next, &reaplist) { |
4752 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
4753 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
4754 | clp->cl_clientid.cl_id); | |
4864af97 | 4755 | list_del_init(&clp->cl_lru); |
1da177e4 LT |
4756 | expire_client(clp); |
4757 | } | |
cdc97505 | 4758 | spin_lock(&state_lock); |
e8c69d17 | 4759 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 LT |
4760 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
4761 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
a832e7ae JL |
4762 | t = dp->dl_time - cutoff; |
4763 | new_timeo = min(new_timeo, t); | |
1da177e4 LT |
4764 | break; |
4765 | } | |
3fcbbd24 | 4766 | WARN_ON(!unhash_delegation_locked(dp)); |
42690676 | 4767 | list_add(&dp->dl_recall_lru, &reaplist); |
1da177e4 | 4768 | } |
cdc97505 | 4769 | spin_unlock(&state_lock); |
2d4a532d JL |
4770 | while (!list_empty(&reaplist)) { |
4771 | dp = list_first_entry(&reaplist, struct nfs4_delegation, | |
4772 | dl_recall_lru); | |
4773 | list_del_init(&dp->dl_recall_lru); | |
3bd64a5b | 4774 | revoke_delegation(dp); |
1da177e4 | 4775 | } |
217526e7 JL |
4776 | |
4777 | spin_lock(&nn->client_lock); | |
4778 | while (!list_empty(&nn->close_lru)) { | |
4779 | oo = list_first_entry(&nn->close_lru, struct nfs4_openowner, | |
4780 | oo_close_lru); | |
4781 | if (time_after((unsigned long)oo->oo_time, | |
4782 | (unsigned long)cutoff)) { | |
a832e7ae JL |
4783 | t = oo->oo_time - cutoff; |
4784 | new_timeo = min(new_timeo, t); | |
1da177e4 LT |
4785 | break; |
4786 | } | |
217526e7 JL |
4787 | list_del_init(&oo->oo_close_lru); |
4788 | stp = oo->oo_last_closed_stid; | |
4789 | oo->oo_last_closed_stid = NULL; | |
4790 | spin_unlock(&nn->client_lock); | |
4791 | nfs4_put_stid(&stp->st_stid); | |
4792 | spin_lock(&nn->client_lock); | |
1da177e4 | 4793 | } |
217526e7 JL |
4794 | spin_unlock(&nn->client_lock); |
4795 | ||
7919d0a2 JL |
4796 | /* |
4797 | * It's possible for a client to try and acquire an already held lock | |
4798 | * that is being held for a long time, and then lose interest in it. | |
4799 | * So, we clean out any un-revisited request after a lease period | |
4800 | * under the assumption that the client is no longer interested. | |
4801 | * | |
4802 | * RFC5661, sec. 9.6 states that the client must not rely on getting | |
4803 | * notifications and must continue to poll for locks, even when the | |
4804 | * server supports them. Thus this shouldn't lead to clients blocking | |
4805 | * indefinitely once the lock does become free. | |
4806 | */ | |
4807 | BUG_ON(!list_empty(&reaplist)); | |
0cc11a61 | 4808 | spin_lock(&nn->blocked_locks_lock); |
7919d0a2 JL |
4809 | while (!list_empty(&nn->blocked_locks_lru)) { |
4810 | nbl = list_first_entry(&nn->blocked_locks_lru, | |
4811 | struct nfsd4_blocked_lock, nbl_lru); | |
4812 | if (time_after((unsigned long)nbl->nbl_time, | |
4813 | (unsigned long)cutoff)) { | |
4814 | t = nbl->nbl_time - cutoff; | |
4815 | new_timeo = min(new_timeo, t); | |
4816 | break; | |
4817 | } | |
4818 | list_move(&nbl->nbl_lru, &reaplist); | |
4819 | list_del_init(&nbl->nbl_list); | |
4820 | } | |
0cc11a61 | 4821 | spin_unlock(&nn->blocked_locks_lock); |
7919d0a2 JL |
4822 | |
4823 | while (!list_empty(&reaplist)) { | |
b78da96d | 4824 | nbl = list_first_entry(&reaplist, |
7919d0a2 JL |
4825 | struct nfsd4_blocked_lock, nbl_lru); |
4826 | list_del_init(&nbl->nbl_lru); | |
4827 | posix_unblock_lock(&nbl->nbl_lock); | |
4828 | free_blocked_lock(nbl); | |
4829 | } | |
4830 | ||
a832e7ae | 4831 | new_timeo = max_t(time_t, new_timeo, NFSD_LAUNDROMAT_MINTIMEOUT); |
a832e7ae | 4832 | return new_timeo; |
1da177e4 LT |
4833 | } |
4834 | ||
a254b246 HH |
4835 | static struct workqueue_struct *laundry_wq; |
4836 | static void laundromat_main(struct work_struct *); | |
a254b246 HH |
4837 | |
4838 | static void | |
09121281 | 4839 | laundromat_main(struct work_struct *laundry) |
1da177e4 LT |
4840 | { |
4841 | time_t t; | |
2e55f3ab | 4842 | struct delayed_work *dwork = to_delayed_work(laundry); |
09121281 SK |
4843 | struct nfsd_net *nn = container_of(dwork, struct nfsd_net, |
4844 | laundromat_work); | |
1da177e4 | 4845 | |
09121281 | 4846 | t = nfs4_laundromat(nn); |
1da177e4 | 4847 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); |
09121281 | 4848 | queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ); |
1da177e4 LT |
4849 | } |
4850 | ||
8fcd461d | 4851 | static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stid *stp) |
1da177e4 | 4852 | { |
8fcd461d | 4853 | if (!fh_match(&fhp->fh_handle, &stp->sc_file->fi_fhandle)) |
f7a4d872 BF |
4854 | return nfserr_bad_stateid; |
4855 | return nfs_ok; | |
1da177e4 LT |
4856 | } |
4857 | ||
1da177e4 | 4858 | static inline int |
82c5ff1b | 4859 | access_permit_read(struct nfs4_ol_stateid *stp) |
1da177e4 | 4860 | { |
82c5ff1b JL |
4861 | return test_access(NFS4_SHARE_ACCESS_READ, stp) || |
4862 | test_access(NFS4_SHARE_ACCESS_BOTH, stp) || | |
4863 | test_access(NFS4_SHARE_ACCESS_WRITE, stp); | |
1da177e4 LT |
4864 | } |
4865 | ||
4866 | static inline int | |
82c5ff1b | 4867 | access_permit_write(struct nfs4_ol_stateid *stp) |
1da177e4 | 4868 | { |
82c5ff1b JL |
4869 | return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || |
4870 | test_access(NFS4_SHARE_ACCESS_BOTH, stp); | |
1da177e4 LT |
4871 | } |
4872 | ||
4873 | static | |
dcef0413 | 4874 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
1da177e4 | 4875 | { |
b37ad28b | 4876 | __be32 status = nfserr_openmode; |
1da177e4 | 4877 | |
02921914 BF |
4878 | /* For lock stateid's, we test the parent open, not the lock: */ |
4879 | if (stp->st_openstp) | |
4880 | stp = stp->st_openstp; | |
82c5ff1b | 4881 | if ((flags & WR_STATE) && !access_permit_write(stp)) |
1da177e4 | 4882 | goto out; |
82c5ff1b | 4883 | if ((flags & RD_STATE) && !access_permit_read(stp)) |
1da177e4 LT |
4884 | goto out; |
4885 | status = nfs_ok; | |
4886 | out: | |
4887 | return status; | |
4888 | } | |
4889 | ||
b37ad28b | 4890 | static inline __be32 |
5ccb0066 | 4891 | check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags) |
1da177e4 | 4892 | { |
203a8c8e | 4893 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 4894 | return nfs_ok; |
c87fb4a3 | 4895 | else if (opens_in_grace(net)) { |
25985edc | 4896 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
4897 | * conflicting state; so we must wait out the grace period. */ |
4898 | return nfserr_grace; | |
4899 | } else if (flags & WR_STATE) | |
4900 | return nfs4_share_conflict(current_fh, | |
4901 | NFS4_SHARE_DENY_WRITE); | |
4902 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
4903 | return nfs4_share_conflict(current_fh, | |
4904 | NFS4_SHARE_DENY_READ); | |
4905 | } | |
4906 | ||
4907 | /* | |
4908 | * Allow READ/WRITE during grace period on recovered state only for files | |
4909 | * that are not able to provide mandatory locking. | |
4910 | */ | |
4911 | static inline int | |
5ccb0066 | 4912 | grace_disallows_io(struct net *net, struct inode *inode) |
1da177e4 | 4913 | { |
c87fb4a3 | 4914 | return opens_in_grace(net) && mandatory_lock(inode); |
1da177e4 LT |
4915 | } |
4916 | ||
57b7b43b | 4917 | static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 4918 | { |
6668958f AA |
4919 | /* |
4920 | * When sessions are used the stateid generation number is ignored | |
4921 | * when it is zero. | |
4922 | */ | |
28dde241 | 4923 | if (has_session && in->si_generation == 0) |
81b82965 BF |
4924 | return nfs_ok; |
4925 | ||
4926 | if (in->si_generation == ref->si_generation) | |
4927 | return nfs_ok; | |
6668958f | 4928 | |
0836f587 | 4929 | /* If the client sends us a stateid from the future, it's buggy: */ |
14b7f4a1 | 4930 | if (nfsd4_stateid_generation_after(in, ref)) |
0836f587 BF |
4931 | return nfserr_bad_stateid; |
4932 | /* | |
81b82965 BF |
4933 | * However, we could see a stateid from the past, even from a |
4934 | * non-buggy client. For example, if the client sends a lock | |
4935 | * while some IO is outstanding, the lock may bump si_generation | |
4936 | * while the IO is still in flight. The client could avoid that | |
4937 | * situation by waiting for responses on all the IO requests, | |
4938 | * but better performance may result in retrying IO that | |
4939 | * receives an old_stateid error if requests are rarely | |
4940 | * reordered in flight: | |
0836f587 | 4941 | */ |
81b82965 | 4942 | return nfserr_old_stateid; |
0836f587 BF |
4943 | } |
4944 | ||
ebe9cb3b CH |
4945 | static __be32 nfsd4_check_openowner_confirmed(struct nfs4_ol_stateid *ols) |
4946 | { | |
4947 | if (ols->st_stateowner->so_is_open_owner && | |
4948 | !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) | |
4949 | return nfserr_bad_stateid; | |
4950 | return nfs_ok; | |
4951 | } | |
4952 | ||
7df302f7 | 4953 | static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) |
17456804 | 4954 | { |
97b7e3b6 | 4955 | struct nfs4_stid *s; |
1af71cc8 | 4956 | __be32 status = nfserr_bad_stateid; |
17456804 | 4957 | |
631db7f3 AE |
4958 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid) || |
4959 | CLOSE_STATEID(stateid)) | |
1af71cc8 | 4960 | return status; |
7df302f7 CL |
4961 | /* Client debugging aid. */ |
4962 | if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) { | |
4963 | char addr_str[INET6_ADDRSTRLEN]; | |
4964 | rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str, | |
4965 | sizeof(addr_str)); | |
4966 | pr_warn_ratelimited("NFSD: client %s testing state ID " | |
4967 | "with incorrect client ID\n", addr_str); | |
1af71cc8 | 4968 | return status; |
7df302f7 | 4969 | } |
1af71cc8 JL |
4970 | spin_lock(&cl->cl_lock); |
4971 | s = find_stateid_locked(cl, stateid); | |
97b7e3b6 | 4972 | if (!s) |
1af71cc8 | 4973 | goto out_unlock; |
36279ac1 | 4974 | status = check_stateid_generation(stateid, &s->sc_stateid, 1); |
17456804 | 4975 | if (status) |
1af71cc8 | 4976 | goto out_unlock; |
23340032 BF |
4977 | switch (s->sc_type) { |
4978 | case NFS4_DELEG_STID: | |
1af71cc8 JL |
4979 | status = nfs_ok; |
4980 | break; | |
3bd64a5b | 4981 | case NFS4_REVOKED_DELEG_STID: |
1af71cc8 JL |
4982 | status = nfserr_deleg_revoked; |
4983 | break; | |
23340032 BF |
4984 | case NFS4_OPEN_STID: |
4985 | case NFS4_LOCK_STID: | |
ebe9cb3b | 4986 | status = nfsd4_check_openowner_confirmed(openlockstateid(s)); |
1af71cc8 | 4987 | break; |
23340032 BF |
4988 | default: |
4989 | printk("unknown stateid type %x\n", s->sc_type); | |
b0fc29d6 | 4990 | /* Fallthrough */ |
23340032 | 4991 | case NFS4_CLOSED_STID: |
b0fc29d6 | 4992 | case NFS4_CLOSED_DELEG_STID: |
1af71cc8 | 4993 | status = nfserr_bad_stateid; |
23340032 | 4994 | } |
1af71cc8 JL |
4995 | out_unlock: |
4996 | spin_unlock(&cl->cl_lock); | |
4997 | return status; | |
17456804 BS |
4998 | } |
4999 | ||
cd61c522 | 5000 | __be32 |
2dd6e458 TM |
5001 | nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate, |
5002 | stateid_t *stateid, unsigned char typemask, | |
5003 | struct nfs4_stid **s, struct nfsd_net *nn) | |
38c2f4b1 | 5004 | { |
0eb6f20a | 5005 | __be32 status; |
584f0bb5 AE |
5006 | bool return_revoked = false; |
5007 | ||
5008 | /* | |
5009 | * only return revoked delegations if explicitly asked. | |
5010 | * otherwise we report revoked or bad_stateid status. | |
5011 | */ | |
5012 | if (typemask & NFS4_REVOKED_DELEG_STID) | |
5013 | return_revoked = true; | |
5014 | else if (typemask & NFS4_DELEG_STID) | |
5015 | typemask |= NFS4_REVOKED_DELEG_STID; | |
38c2f4b1 | 5016 | |
631db7f3 AE |
5017 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid) || |
5018 | CLOSE_STATEID(stateid)) | |
38c2f4b1 | 5019 | return nfserr_bad_stateid; |
4b24ca7d | 5020 | status = lookup_clientid(&stateid->si_opaque.so_clid, cstate, nn); |
a8a7c677 | 5021 | if (status == nfserr_stale_clientid) { |
4b24ca7d | 5022 | if (cstate->session) |
a8a7c677 | 5023 | return nfserr_bad_stateid; |
38c2f4b1 | 5024 | return nfserr_stale_stateid; |
a8a7c677 | 5025 | } |
0eb6f20a BF |
5026 | if (status) |
5027 | return status; | |
4b24ca7d | 5028 | *s = find_stateid_by_type(cstate->clp, stateid, typemask); |
38c2f4b1 BF |
5029 | if (!*s) |
5030 | return nfserr_bad_stateid; | |
584f0bb5 AE |
5031 | if (((*s)->sc_type == NFS4_REVOKED_DELEG_STID) && !return_revoked) { |
5032 | nfs4_put_stid(*s); | |
5033 | if (cstate->minorversion) | |
5034 | return nfserr_deleg_revoked; | |
5035 | return nfserr_bad_stateid; | |
5036 | } | |
38c2f4b1 | 5037 | return nfs_ok; |
38c2f4b1 BF |
5038 | } |
5039 | ||
a0649b2d CH |
5040 | static struct file * |
5041 | nfs4_find_file(struct nfs4_stid *s, int flags) | |
5042 | { | |
af90f707 CH |
5043 | if (!s) |
5044 | return NULL; | |
5045 | ||
a0649b2d CH |
5046 | switch (s->sc_type) { |
5047 | case NFS4_DELEG_STID: | |
5048 | if (WARN_ON_ONCE(!s->sc_file->fi_deleg_file)) | |
5049 | return NULL; | |
5050 | return get_file(s->sc_file->fi_deleg_file); | |
5051 | case NFS4_OPEN_STID: | |
5052 | case NFS4_LOCK_STID: | |
5053 | if (flags & RD_STATE) | |
5054 | return find_readable_file(s->sc_file); | |
5055 | else | |
5056 | return find_writeable_file(s->sc_file); | |
5057 | break; | |
5058 | } | |
5059 | ||
5060 | return NULL; | |
5061 | } | |
5062 | ||
5063 | static __be32 | |
5064 | nfs4_check_olstateid(struct svc_fh *fhp, struct nfs4_ol_stateid *ols, int flags) | |
5065 | { | |
5066 | __be32 status; | |
5067 | ||
a0649b2d CH |
5068 | status = nfsd4_check_openowner_confirmed(ols); |
5069 | if (status) | |
5070 | return status; | |
5071 | return nfs4_check_openmode(ols, flags); | |
5072 | } | |
5073 | ||
af90f707 CH |
5074 | static __be32 |
5075 | nfs4_check_file(struct svc_rqst *rqstp, struct svc_fh *fhp, struct nfs4_stid *s, | |
5076 | struct file **filpp, bool *tmp_file, int flags) | |
5077 | { | |
5078 | int acc = (flags & RD_STATE) ? NFSD_MAY_READ : NFSD_MAY_WRITE; | |
5079 | struct file *file; | |
5080 | __be32 status; | |
5081 | ||
5082 | file = nfs4_find_file(s, flags); | |
5083 | if (file) { | |
5084 | status = nfsd_permission(rqstp, fhp->fh_export, fhp->fh_dentry, | |
5085 | acc | NFSD_MAY_OWNER_OVERRIDE); | |
5086 | if (status) { | |
5087 | fput(file); | |
5088 | return status; | |
5089 | } | |
5090 | ||
5091 | *filpp = file; | |
5092 | } else { | |
5093 | status = nfsd_open(rqstp, fhp, S_IFREG, acc, filpp); | |
5094 | if (status) | |
5095 | return status; | |
5096 | ||
5097 | if (tmp_file) | |
5098 | *tmp_file = true; | |
5099 | } | |
5100 | ||
5101 | return 0; | |
5102 | } | |
5103 | ||
1da177e4 | 5104 | /* |
a0649b2d CH |
5105 | * Checks for stateid operations |
5106 | */ | |
b37ad28b | 5107 | __be32 |
af90f707 | 5108 | nfs4_preprocess_stateid_op(struct svc_rqst *rqstp, |
aa0d6aed AS |
5109 | struct nfsd4_compound_state *cstate, struct svc_fh *fhp, |
5110 | stateid_t *stateid, int flags, struct file **filpp, bool *tmp_file) | |
1da177e4 | 5111 | { |
a0649b2d | 5112 | struct inode *ino = d_inode(fhp->fh_dentry); |
af90f707 | 5113 | struct net *net = SVC_NET(rqstp); |
3320fef1 | 5114 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
af90f707 | 5115 | struct nfs4_stid *s = NULL; |
b37ad28b | 5116 | __be32 status; |
1da177e4 | 5117 | |
1da177e4 LT |
5118 | if (filpp) |
5119 | *filpp = NULL; | |
af90f707 CH |
5120 | if (tmp_file) |
5121 | *tmp_file = false; | |
1da177e4 | 5122 | |
5ccb0066 | 5123 | if (grace_disallows_io(net, ino)) |
1da177e4 LT |
5124 | return nfserr_grace; |
5125 | ||
af90f707 CH |
5126 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { |
5127 | status = check_special_stateids(net, fhp, stateid, flags); | |
5128 | goto done; | |
5129 | } | |
1da177e4 | 5130 | |
2dd6e458 | 5131 | status = nfsd4_lookup_stateid(cstate, stateid, |
db24b3b4 | 5132 | NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, |
2dd6e458 | 5133 | &s, nn); |
38c2f4b1 | 5134 | if (status) |
c2d1d6a8 | 5135 | return status; |
a0649b2d CH |
5136 | status = check_stateid_generation(stateid, &s->sc_stateid, |
5137 | nfsd4_has_session(cstate)); | |
69064a27 BF |
5138 | if (status) |
5139 | goto out; | |
a0649b2d | 5140 | |
f7a4d872 BF |
5141 | switch (s->sc_type) { |
5142 | case NFS4_DELEG_STID: | |
a0649b2d | 5143 | status = nfs4_check_delegmode(delegstateid(s), flags); |
f7a4d872 BF |
5144 | break; |
5145 | case NFS4_OPEN_STID: | |
5146 | case NFS4_LOCK_STID: | |
a0649b2d | 5147 | status = nfs4_check_olstateid(fhp, openlockstateid(s), flags); |
f7a4d872 BF |
5148 | break; |
5149 | default: | |
14bcab1a | 5150 | status = nfserr_bad_stateid; |
a0649b2d CH |
5151 | break; |
5152 | } | |
8fcd461d JL |
5153 | if (status) |
5154 | goto out; | |
5155 | status = nfs4_check_fh(fhp, s); | |
a0649b2d | 5156 | |
af90f707 CH |
5157 | done: |
5158 | if (!status && filpp) | |
5159 | status = nfs4_check_file(rqstp, fhp, s, filpp, tmp_file, flags); | |
1da177e4 | 5160 | out: |
af90f707 CH |
5161 | if (s) |
5162 | nfs4_put_stid(s); | |
1da177e4 LT |
5163 | return status; |
5164 | } | |
5165 | ||
17456804 BS |
5166 | /* |
5167 | * Test if the stateid is valid | |
5168 | */ | |
5169 | __be32 | |
5170 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
eb69853d | 5171 | union nfsd4_op_u *u) |
17456804 | 5172 | { |
eb69853d | 5173 | struct nfsd4_test_stateid *test_stateid = &u->test_stateid; |
03cfb420 BS |
5174 | struct nfsd4_test_stateid_id *stateid; |
5175 | struct nfs4_client *cl = cstate->session->se_client; | |
5176 | ||
03cfb420 | 5177 | list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) |
7df302f7 CL |
5178 | stateid->ts_id_status = |
5179 | nfsd4_validate_stateid(cl, &stateid->ts_id_stateid); | |
03cfb420 | 5180 | |
17456804 BS |
5181 | return nfs_ok; |
5182 | } | |
5183 | ||
42691398 CL |
5184 | static __be32 |
5185 | nfsd4_free_lock_stateid(stateid_t *stateid, struct nfs4_stid *s) | |
5186 | { | |
5187 | struct nfs4_ol_stateid *stp = openlockstateid(s); | |
5188 | __be32 ret; | |
5189 | ||
5190 | mutex_lock(&stp->st_mutex); | |
5191 | ||
5192 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); | |
5193 | if (ret) | |
5194 | goto out; | |
5195 | ||
5196 | ret = nfserr_locks_held; | |
5197 | if (check_for_locks(stp->st_stid.sc_file, | |
5198 | lockowner(stp->st_stateowner))) | |
5199 | goto out; | |
5200 | ||
5201 | release_lock_stateid(stp); | |
5202 | ret = nfs_ok; | |
5203 | ||
5204 | out: | |
5205 | mutex_unlock(&stp->st_mutex); | |
5206 | nfs4_put_stid(s); | |
5207 | return ret; | |
5208 | } | |
5209 | ||
e1ca12df BS |
5210 | __be32 |
5211 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
eb69853d | 5212 | union nfsd4_op_u *u) |
e1ca12df | 5213 | { |
eb69853d | 5214 | struct nfsd4_free_stateid *free_stateid = &u->free_stateid; |
e1ca12df | 5215 | stateid_t *stateid = &free_stateid->fr_stateid; |
2da1cec7 | 5216 | struct nfs4_stid *s; |
3bd64a5b | 5217 | struct nfs4_delegation *dp; |
38c2f4b1 | 5218 | struct nfs4_client *cl = cstate->session->se_client; |
2da1cec7 | 5219 | __be32 ret = nfserr_bad_stateid; |
e1ca12df | 5220 | |
1af71cc8 JL |
5221 | spin_lock(&cl->cl_lock); |
5222 | s = find_stateid_locked(cl, stateid); | |
2da1cec7 | 5223 | if (!s) |
1af71cc8 | 5224 | goto out_unlock; |
2da1cec7 BF |
5225 | switch (s->sc_type) { |
5226 | case NFS4_DELEG_STID: | |
e1ca12df | 5227 | ret = nfserr_locks_held; |
1af71cc8 | 5228 | break; |
2da1cec7 | 5229 | case NFS4_OPEN_STID: |
2da1cec7 BF |
5230 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); |
5231 | if (ret) | |
1af71cc8 JL |
5232 | break; |
5233 | ret = nfserr_locks_held; | |
f7a4d872 | 5234 | break; |
1af71cc8 | 5235 | case NFS4_LOCK_STID: |
42691398 | 5236 | atomic_inc(&s->sc_count); |
1af71cc8 | 5237 | spin_unlock(&cl->cl_lock); |
42691398 | 5238 | ret = nfsd4_free_lock_stateid(stateid, s); |
1af71cc8 | 5239 | goto out; |
3bd64a5b BF |
5240 | case NFS4_REVOKED_DELEG_STID: |
5241 | dp = delegstateid(s); | |
2d4a532d JL |
5242 | list_del_init(&dp->dl_recall_lru); |
5243 | spin_unlock(&cl->cl_lock); | |
6011695d | 5244 | nfs4_put_stid(s); |
3bd64a5b | 5245 | ret = nfs_ok; |
1af71cc8 JL |
5246 | goto out; |
5247 | /* Default falls through and returns nfserr_bad_stateid */ | |
e1ca12df | 5248 | } |
1af71cc8 JL |
5249 | out_unlock: |
5250 | spin_unlock(&cl->cl_lock); | |
e1ca12df | 5251 | out: |
e1ca12df BS |
5252 | return ret; |
5253 | } | |
5254 | ||
4c4cd222 N |
5255 | static inline int |
5256 | setlkflg (int type) | |
5257 | { | |
5258 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
5259 | RD_STATE : WR_STATE; | |
5260 | } | |
1da177e4 | 5261 | |
dcef0413 | 5262 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
c0a5d93e BF |
5263 | { |
5264 | struct svc_fh *current_fh = &cstate->current_fh; | |
5265 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
5266 | __be32 status; | |
5267 | ||
c0a5d93e BF |
5268 | status = nfsd4_check_seqid(cstate, sop, seqid); |
5269 | if (status) | |
5270 | return status; | |
3bd364d1 TM |
5271 | status = nfsd4_lock_ol_stateid(stp); |
5272 | if (status != nfs_ok) | |
5273 | return status; | |
f7a4d872 | 5274 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); |
35a92fe8 JL |
5275 | if (status == nfs_ok) |
5276 | status = nfs4_check_fh(current_fh, &stp->st_stid); | |
5277 | if (status != nfs_ok) | |
feb9dad5 | 5278 | mutex_unlock(&stp->st_mutex); |
35a92fe8 | 5279 | return status; |
c0a5d93e BF |
5280 | } |
5281 | ||
1da177e4 LT |
5282 | /* |
5283 | * Checks for sequence id mutating operations. | |
5284 | */ | |
b37ad28b | 5285 | static __be32 |
dd453dfd | 5286 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2288d0e3 | 5287 | stateid_t *stateid, char typemask, |
3320fef1 SK |
5288 | struct nfs4_ol_stateid **stpp, |
5289 | struct nfsd_net *nn) | |
1da177e4 | 5290 | { |
0836f587 | 5291 | __be32 status; |
38c2f4b1 | 5292 | struct nfs4_stid *s; |
e17f99b7 | 5293 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 5294 | |
8c10cbdb BH |
5295 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
5296 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 5297 | |
1da177e4 | 5298 | *stpp = NULL; |
2dd6e458 | 5299 | status = nfsd4_lookup_stateid(cstate, stateid, typemask, &s, nn); |
c0a5d93e BF |
5300 | if (status) |
5301 | return status; | |
e17f99b7 | 5302 | stp = openlockstateid(s); |
58fb12e6 | 5303 | nfsd4_cstate_assign_replay(cstate, stp->st_stateowner); |
1da177e4 | 5304 | |
e17f99b7 | 5305 | status = nfs4_seqid_op_checks(cstate, stateid, seqid, stp); |
fd911011 | 5306 | if (!status) |
e17f99b7 | 5307 | *stpp = stp; |
fd911011 TM |
5308 | else |
5309 | nfs4_put_stid(&stp->st_stid); | |
e17f99b7 | 5310 | return status; |
c0a5d93e | 5311 | } |
39325bd0 | 5312 | |
3320fef1 SK |
5313 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
5314 | stateid_t *stateid, struct nfs4_ol_stateid **stpp, struct nfsd_net *nn) | |
c0a5d93e BF |
5315 | { |
5316 | __be32 status; | |
5317 | struct nfs4_openowner *oo; | |
4cbfc9f7 | 5318 | struct nfs4_ol_stateid *stp; |
1da177e4 | 5319 | |
c0a5d93e | 5320 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
4cbfc9f7 | 5321 | NFS4_OPEN_STID, &stp, nn); |
7a8711c9 BF |
5322 | if (status) |
5323 | return status; | |
4cbfc9f7 TM |
5324 | oo = openowner(stp->st_stateowner); |
5325 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { | |
feb9dad5 | 5326 | mutex_unlock(&stp->st_mutex); |
4cbfc9f7 | 5327 | nfs4_put_stid(&stp->st_stid); |
3a4f98bb | 5328 | return nfserr_bad_stateid; |
4cbfc9f7 TM |
5329 | } |
5330 | *stpp = stp; | |
3a4f98bb | 5331 | return nfs_ok; |
1da177e4 LT |
5332 | } |
5333 | ||
b37ad28b | 5334 | __be32 |
ca364317 | 5335 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 5336 | union nfsd4_op_u *u) |
1da177e4 | 5337 | { |
eb69853d | 5338 | struct nfsd4_open_confirm *oc = &u->open_confirm; |
b37ad28b | 5339 | __be32 status; |
fe0750e5 | 5340 | struct nfs4_openowner *oo; |
dcef0413 | 5341 | struct nfs4_ol_stateid *stp; |
3320fef1 | 5342 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 5343 | |
a6a9f18f AV |
5344 | dprintk("NFSD: nfsd4_open_confirm on file %pd\n", |
5345 | cstate->current_fh.fh_dentry); | |
1da177e4 | 5346 | |
ca364317 | 5347 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
5348 | if (status) |
5349 | return status; | |
1da177e4 | 5350 | |
9072d5c6 | 5351 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 5352 | oc->oc_seqid, &oc->oc_req_stateid, |
3320fef1 | 5353 | NFS4_OPEN_STID, &stp, nn); |
9072d5c6 | 5354 | if (status) |
68b66e82 | 5355 | goto out; |
fe0750e5 | 5356 | oo = openowner(stp->st_stateowner); |
68b66e82 | 5357 | status = nfserr_bad_stateid; |
35a92fe8 | 5358 | if (oo->oo_flags & NFS4_OO_CONFIRMED) { |
feb9dad5 | 5359 | mutex_unlock(&stp->st_mutex); |
2585fc79 | 5360 | goto put_stateid; |
35a92fe8 | 5361 | } |
dad1c067 | 5362 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
9767feb2 | 5363 | nfs4_inc_and_copy_stateid(&oc->oc_resp_stateid, &stp->st_stid); |
feb9dad5 | 5364 | mutex_unlock(&stp->st_mutex); |
8c10cbdb | 5365 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
dcef0413 | 5366 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); |
c7b9a459 | 5367 | |
2a4317c5 | 5368 | nfsd4_client_record_create(oo->oo_owner.so_client); |
68b66e82 | 5369 | status = nfs_ok; |
2585fc79 TM |
5370 | put_stateid: |
5371 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 5372 | out: |
9411b1d4 | 5373 | nfsd4_bump_seqid(cstate, status); |
1da177e4 LT |
5374 | return status; |
5375 | } | |
5376 | ||
6409a5a6 | 5377 | static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) |
1da177e4 | 5378 | { |
82c5ff1b | 5379 | if (!test_access(access, stp)) |
6409a5a6 | 5380 | return; |
11b9164a | 5381 | nfs4_file_put_access(stp->st_stid.sc_file, access); |
82c5ff1b | 5382 | clear_access(access, stp); |
6409a5a6 | 5383 | } |
f197c271 | 5384 | |
6409a5a6 BF |
5385 | static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) |
5386 | { | |
5387 | switch (to_access) { | |
5388 | case NFS4_SHARE_ACCESS_READ: | |
5389 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); | |
5390 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
5391 | break; | |
5392 | case NFS4_SHARE_ACCESS_WRITE: | |
5393 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); | |
5394 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
5395 | break; | |
5396 | case NFS4_SHARE_ACCESS_BOTH: | |
5397 | break; | |
5398 | default: | |
063b0fb9 | 5399 | WARN_ON_ONCE(1); |
1da177e4 LT |
5400 | } |
5401 | } | |
5402 | ||
b37ad28b | 5403 | __be32 |
ca364317 | 5404 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
eb69853d | 5405 | struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) |
1da177e4 | 5406 | { |
eb69853d | 5407 | struct nfsd4_open_downgrade *od = &u->open_downgrade; |
b37ad28b | 5408 | __be32 status; |
dcef0413 | 5409 | struct nfs4_ol_stateid *stp; |
3320fef1 | 5410 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 5411 | |
a6a9f18f AV |
5412 | dprintk("NFSD: nfsd4_open_downgrade on file %pd\n", |
5413 | cstate->current_fh.fh_dentry); | |
1da177e4 | 5414 | |
c30e92df | 5415 | /* We don't yet support WANT bits: */ |
2c8bd7e0 BH |
5416 | if (od->od_deleg_want) |
5417 | dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, | |
5418 | od->od_deleg_want); | |
1da177e4 | 5419 | |
c0a5d93e | 5420 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
3320fef1 | 5421 | &od->od_stateid, &stp, nn); |
9072d5c6 | 5422 | if (status) |
1da177e4 | 5423 | goto out; |
1da177e4 | 5424 | status = nfserr_inval; |
82c5ff1b | 5425 | if (!test_access(od->od_share_access, stp)) { |
c11c591f | 5426 | dprintk("NFSD: access not a subset of current bitmap: 0x%hhx, input access=%08x\n", |
1da177e4 | 5427 | stp->st_access_bmap, od->od_share_access); |
0667b1e9 | 5428 | goto put_stateid; |
1da177e4 | 5429 | } |
ce0fc43c | 5430 | if (!test_deny(od->od_share_deny, stp)) { |
c11c591f | 5431 | dprintk("NFSD: deny not a subset of current bitmap: 0x%hhx, input deny=%08x\n", |
1da177e4 | 5432 | stp->st_deny_bmap, od->od_share_deny); |
0667b1e9 | 5433 | goto put_stateid; |
1da177e4 | 5434 | } |
6409a5a6 | 5435 | nfs4_stateid_downgrade(stp, od->od_share_access); |
ce0fc43c | 5436 | reset_union_bmap_deny(od->od_share_deny, stp); |
9767feb2 | 5437 | nfs4_inc_and_copy_stateid(&od->od_stateid, &stp->st_stid); |
1da177e4 | 5438 | status = nfs_ok; |
0667b1e9 | 5439 | put_stateid: |
feb9dad5 | 5440 | mutex_unlock(&stp->st_mutex); |
0667b1e9 | 5441 | nfs4_put_stid(&stp->st_stid); |
1da177e4 | 5442 | out: |
9411b1d4 | 5443 | nfsd4_bump_seqid(cstate, status); |
1da177e4 LT |
5444 | return status; |
5445 | } | |
5446 | ||
f7a4d872 BF |
5447 | static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) |
5448 | { | |
acf9295b | 5449 | struct nfs4_client *clp = s->st_stid.sc_client; |
e8568739 | 5450 | bool unhashed; |
d83017f9 | 5451 | LIST_HEAD(reaplist); |
acf9295b | 5452 | |
2c41beb0 | 5453 | spin_lock(&clp->cl_lock); |
e8568739 | 5454 | unhashed = unhash_open_stateid(s, &reaplist); |
acf9295b | 5455 | |
d83017f9 | 5456 | if (clp->cl_minorversion) { |
e8568739 JL |
5457 | if (unhashed) |
5458 | put_ol_stateid_locked(s, &reaplist); | |
d83017f9 JL |
5459 | spin_unlock(&clp->cl_lock); |
5460 | free_ol_stateid_reaplist(&reaplist); | |
5461 | } else { | |
5462 | spin_unlock(&clp->cl_lock); | |
5463 | free_ol_stateid_reaplist(&reaplist); | |
e8568739 JL |
5464 | if (unhashed) |
5465 | move_to_close_lru(s, clp->net); | |
d83017f9 | 5466 | } |
38c387b5 BF |
5467 | } |
5468 | ||
1da177e4 LT |
5469 | /* |
5470 | * nfs4_unlock_state() called after encode | |
5471 | */ | |
b37ad28b | 5472 | __be32 |
ca364317 | 5473 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 5474 | union nfsd4_op_u *u) |
1da177e4 | 5475 | { |
eb69853d | 5476 | struct nfsd4_close *close = &u->close; |
b37ad28b | 5477 | __be32 status; |
dcef0413 | 5478 | struct nfs4_ol_stateid *stp; |
3320fef1 SK |
5479 | struct net *net = SVC_NET(rqstp); |
5480 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 | 5481 | |
a6a9f18f AV |
5482 | dprintk("NFSD: nfsd4_close on file %pd\n", |
5483 | cstate->current_fh.fh_dentry); | |
1da177e4 | 5484 | |
f7a4d872 BF |
5485 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
5486 | &close->cl_stateid, | |
5487 | NFS4_OPEN_STID|NFS4_CLOSED_STID, | |
3320fef1 | 5488 | &stp, nn); |
9411b1d4 | 5489 | nfsd4_bump_seqid(cstate, status); |
9072d5c6 | 5490 | if (status) |
1da177e4 | 5491 | goto out; |
db77ab54 TM |
5492 | |
5493 | stp->st_stid.sc_type = NFS4_CLOSED_STID; | |
9767feb2 | 5494 | nfs4_inc_and_copy_stateid(&close->cl_stateid, &stp->st_stid); |
1da177e4 | 5495 | |
f7a4d872 | 5496 | nfsd4_close_open_stateid(stp); |
db77ab54 | 5497 | mutex_unlock(&stp->st_mutex); |
8a0b589d | 5498 | |
5f71ff51 TM |
5499 | /* See RFC5661 sectionm 18.2.4 */ |
5500 | if (stp->st_stid.sc_client->cl_minorversion) | |
5501 | memcpy(&close->cl_stateid, &close_stateid, | |
5502 | sizeof(close->cl_stateid)); | |
5503 | ||
8a0b589d TM |
5504 | /* put reference from nfs4_preprocess_seqid_op */ |
5505 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 5506 | out: |
1da177e4 LT |
5507 | return status; |
5508 | } | |
5509 | ||
b37ad28b | 5510 | __be32 |
ca364317 | 5511 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 5512 | union nfsd4_op_u *u) |
1da177e4 | 5513 | { |
eb69853d | 5514 | struct nfsd4_delegreturn *dr = &u->delegreturn; |
203a8c8e BF |
5515 | struct nfs4_delegation *dp; |
5516 | stateid_t *stateid = &dr->dr_stateid; | |
38c2f4b1 | 5517 | struct nfs4_stid *s; |
b37ad28b | 5518 | __be32 status; |
3320fef1 | 5519 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 5520 | |
ca364317 | 5521 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e | 5522 | return status; |
1da177e4 | 5523 | |
2dd6e458 | 5524 | status = nfsd4_lookup_stateid(cstate, stateid, NFS4_DELEG_STID, &s, nn); |
38c2f4b1 | 5525 | if (status) |
203a8c8e | 5526 | goto out; |
38c2f4b1 | 5527 | dp = delegstateid(s); |
d5477a8d | 5528 | status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); |
203a8c8e | 5529 | if (status) |
fd911011 | 5530 | goto put_stateid; |
203a8c8e | 5531 | |
3bd64a5b | 5532 | destroy_delegation(dp); |
fd911011 TM |
5533 | put_stateid: |
5534 | nfs4_put_stid(&dp->dl_stid); | |
1da177e4 LT |
5535 | out: |
5536 | return status; | |
5537 | } | |
5538 | ||
87df4de8 BH |
5539 | static inline u64 |
5540 | end_offset(u64 start, u64 len) | |
5541 | { | |
5542 | u64 end; | |
5543 | ||
5544 | end = start + len; | |
5545 | return end >= start ? end: NFS4_MAX_UINT64; | |
5546 | } | |
5547 | ||
5548 | /* last octet in a range */ | |
5549 | static inline u64 | |
5550 | last_byte_offset(u64 start, u64 len) | |
5551 | { | |
5552 | u64 end; | |
5553 | ||
063b0fb9 | 5554 | WARN_ON_ONCE(!len); |
87df4de8 BH |
5555 | end = start + len; |
5556 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
5557 | } | |
5558 | ||
1da177e4 LT |
5559 | /* |
5560 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
5561 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
5562 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
5563 | * locking, this prevents us from being completely protocol-compliant. The | |
5564 | * real solution to this problem is to start using unsigned file offsets in | |
5565 | * the VFS, but this is a very deep change! | |
5566 | */ | |
5567 | static inline void | |
5568 | nfs4_transform_lock_offset(struct file_lock *lock) | |
5569 | { | |
5570 | if (lock->fl_start < 0) | |
5571 | lock->fl_start = OFFSET_MAX; | |
5572 | if (lock->fl_end < 0) | |
5573 | lock->fl_end = OFFSET_MAX; | |
5574 | } | |
5575 | ||
cae80b30 JL |
5576 | static fl_owner_t |
5577 | nfsd4_fl_get_owner(fl_owner_t owner) | |
aef9583b | 5578 | { |
cae80b30 JL |
5579 | struct nfs4_lockowner *lo = (struct nfs4_lockowner *)owner; |
5580 | ||
5581 | nfs4_get_stateowner(&lo->lo_owner); | |
5582 | return owner; | |
aef9583b KM |
5583 | } |
5584 | ||
cae80b30 JL |
5585 | static void |
5586 | nfsd4_fl_put_owner(fl_owner_t owner) | |
aef9583b | 5587 | { |
cae80b30 | 5588 | struct nfs4_lockowner *lo = (struct nfs4_lockowner *)owner; |
aef9583b | 5589 | |
cae80b30 | 5590 | if (lo) |
aef9583b | 5591 | nfs4_put_stateowner(&lo->lo_owner); |
aef9583b KM |
5592 | } |
5593 | ||
76d348fa JL |
5594 | static void |
5595 | nfsd4_lm_notify(struct file_lock *fl) | |
5596 | { | |
5597 | struct nfs4_lockowner *lo = (struct nfs4_lockowner *)fl->fl_owner; | |
5598 | struct net *net = lo->lo_owner.so_client->net; | |
5599 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
5600 | struct nfsd4_blocked_lock *nbl = container_of(fl, | |
5601 | struct nfsd4_blocked_lock, nbl_lock); | |
5602 | bool queue = false; | |
5603 | ||
7919d0a2 | 5604 | /* An empty list means that something else is going to be using it */ |
0cc11a61 | 5605 | spin_lock(&nn->blocked_locks_lock); |
76d348fa JL |
5606 | if (!list_empty(&nbl->nbl_list)) { |
5607 | list_del_init(&nbl->nbl_list); | |
7919d0a2 | 5608 | list_del_init(&nbl->nbl_lru); |
76d348fa JL |
5609 | queue = true; |
5610 | } | |
0cc11a61 | 5611 | spin_unlock(&nn->blocked_locks_lock); |
76d348fa JL |
5612 | |
5613 | if (queue) | |
5614 | nfsd4_run_cb(&nbl->nbl_cb); | |
5615 | } | |
5616 | ||
7b021967 | 5617 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
76d348fa | 5618 | .lm_notify = nfsd4_lm_notify, |
aef9583b KM |
5619 | .lm_get_owner = nfsd4_fl_get_owner, |
5620 | .lm_put_owner = nfsd4_fl_put_owner, | |
d5b9026a | 5621 | }; |
1da177e4 LT |
5622 | |
5623 | static inline void | |
5624 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
5625 | { | |
fe0750e5 | 5626 | struct nfs4_lockowner *lo; |
1da177e4 | 5627 | |
d5b9026a | 5628 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 BF |
5629 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
5630 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, | |
5631 | lo->lo_owner.so_owner.len, GFP_KERNEL); | |
7c13f344 BF |
5632 | if (!deny->ld_owner.data) |
5633 | /* We just don't care that much */ | |
5634 | goto nevermind; | |
fe0750e5 BF |
5635 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
5636 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; | |
d5b9026a | 5637 | } else { |
7c13f344 BF |
5638 | nevermind: |
5639 | deny->ld_owner.len = 0; | |
5640 | deny->ld_owner.data = NULL; | |
d5b9026a N |
5641 | deny->ld_clientid.cl_boot = 0; |
5642 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
5643 | } |
5644 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
5645 | deny->ld_length = NFS4_MAX_UINT64; |
5646 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
5647 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
5648 | deny->ld_type = NFS4_READ_LT; | |
5649 | if (fl->fl_type != F_RDLCK) | |
5650 | deny->ld_type = NFS4_WRITE_LT; | |
5651 | } | |
5652 | ||
fe0750e5 | 5653 | static struct nfs4_lockowner * |
c8623999 | 5654 | find_lockowner_str_locked(struct nfs4_client *clp, struct xdr_netobj *owner) |
1da177e4 | 5655 | { |
d4f0489f | 5656 | unsigned int strhashval = ownerstr_hashval(owner); |
b3c32bcd | 5657 | struct nfs4_stateowner *so; |
1da177e4 | 5658 | |
0a880a28 TM |
5659 | lockdep_assert_held(&clp->cl_lock); |
5660 | ||
d4f0489f TM |
5661 | list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[strhashval], |
5662 | so_strhash) { | |
b3c32bcd TM |
5663 | if (so->so_is_open_owner) |
5664 | continue; | |
b5971afa KM |
5665 | if (same_owner_str(so, owner)) |
5666 | return lockowner(nfs4_get_stateowner(so)); | |
1da177e4 LT |
5667 | } |
5668 | return NULL; | |
5669 | } | |
5670 | ||
c58c6610 | 5671 | static struct nfs4_lockowner * |
c8623999 | 5672 | find_lockowner_str(struct nfs4_client *clp, struct xdr_netobj *owner) |
c58c6610 TM |
5673 | { |
5674 | struct nfs4_lockowner *lo; | |
5675 | ||
d4f0489f | 5676 | spin_lock(&clp->cl_lock); |
c8623999 | 5677 | lo = find_lockowner_str_locked(clp, owner); |
d4f0489f | 5678 | spin_unlock(&clp->cl_lock); |
c58c6610 TM |
5679 | return lo; |
5680 | } | |
5681 | ||
8f4b54c5 JL |
5682 | static void nfs4_unhash_lockowner(struct nfs4_stateowner *sop) |
5683 | { | |
c58c6610 | 5684 | unhash_lockowner_locked(lockowner(sop)); |
8f4b54c5 JL |
5685 | } |
5686 | ||
6b180f0b JL |
5687 | static void nfs4_free_lockowner(struct nfs4_stateowner *sop) |
5688 | { | |
5689 | struct nfs4_lockowner *lo = lockowner(sop); | |
5690 | ||
5691 | kmem_cache_free(lockowner_slab, lo); | |
5692 | } | |
5693 | ||
5694 | static const struct nfs4_stateowner_operations lockowner_ops = { | |
8f4b54c5 JL |
5695 | .so_unhash = nfs4_unhash_lockowner, |
5696 | .so_free = nfs4_free_lockowner, | |
6b180f0b JL |
5697 | }; |
5698 | ||
1da177e4 LT |
5699 | /* |
5700 | * Alloc a lock owner structure. | |
5701 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 5702 | * occurred. |
1da177e4 | 5703 | * |
16bfdaaf | 5704 | * strhashval = ownerstr_hashval |
1da177e4 | 5705 | */ |
fe0750e5 | 5706 | static struct nfs4_lockowner * |
c58c6610 TM |
5707 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, |
5708 | struct nfs4_ol_stateid *open_stp, | |
5709 | struct nfsd4_lock *lock) | |
5710 | { | |
c58c6610 | 5711 | struct nfs4_lockowner *lo, *ret; |
1da177e4 | 5712 | |
fe0750e5 BF |
5713 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
5714 | if (!lo) | |
1da177e4 | 5715 | return NULL; |
76d348fa | 5716 | INIT_LIST_HEAD(&lo->lo_blocked); |
fe0750e5 BF |
5717 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
5718 | lo->lo_owner.so_is_open_owner = 0; | |
5db1c03f | 5719 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid; |
6b180f0b | 5720 | lo->lo_owner.so_ops = &lockowner_ops; |
d4f0489f | 5721 | spin_lock(&clp->cl_lock); |
c8623999 | 5722 | ret = find_lockowner_str_locked(clp, &lock->lk_new_owner); |
c58c6610 TM |
5723 | if (ret == NULL) { |
5724 | list_add(&lo->lo_owner.so_strhash, | |
d4f0489f | 5725 | &clp->cl_ownerstr_hashtbl[strhashval]); |
c58c6610 TM |
5726 | ret = lo; |
5727 | } else | |
d50ffded KM |
5728 | nfs4_free_stateowner(&lo->lo_owner); |
5729 | ||
d4f0489f | 5730 | spin_unlock(&clp->cl_lock); |
340f0ba1 | 5731 | return ret; |
1da177e4 LT |
5732 | } |
5733 | ||
356a95ec JL |
5734 | static void |
5735 | init_lock_stateid(struct nfs4_ol_stateid *stp, struct nfs4_lockowner *lo, | |
5736 | struct nfs4_file *fp, struct inode *inode, | |
5737 | struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 5738 | { |
d3b313a4 | 5739 | struct nfs4_client *clp = lo->lo_owner.so_client; |
1da177e4 | 5740 | |
356a95ec JL |
5741 | lockdep_assert_held(&clp->cl_lock); |
5742 | ||
3d0fabd5 | 5743 | atomic_inc(&stp->st_stid.sc_count); |
3abdb607 | 5744 | stp->st_stid.sc_type = NFS4_LOCK_STID; |
b5971afa | 5745 | stp->st_stateowner = nfs4_get_stateowner(&lo->lo_owner); |
13cd2184 | 5746 | get_nfs4_file(fp); |
11b9164a | 5747 | stp->st_stid.sc_file = fp; |
0997b173 | 5748 | stp->st_access_bmap = 0; |
1da177e4 | 5749 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 5750 | stp->st_openstp = open_stp; |
feb9dad5 | 5751 | mutex_init(&stp->st_mutex); |
3c87b9b7 | 5752 | list_add(&stp->st_locks, &open_stp->st_locks); |
1c755dc1 | 5753 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
1d31a253 TM |
5754 | spin_lock(&fp->fi_lock); |
5755 | list_add(&stp->st_perfile, &fp->fi_stateids); | |
5756 | spin_unlock(&fp->fi_lock); | |
1da177e4 LT |
5757 | } |
5758 | ||
c53530da JL |
5759 | static struct nfs4_ol_stateid * |
5760 | find_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp) | |
5761 | { | |
5762 | struct nfs4_ol_stateid *lst; | |
356a95ec JL |
5763 | struct nfs4_client *clp = lo->lo_owner.so_client; |
5764 | ||
5765 | lockdep_assert_held(&clp->cl_lock); | |
c53530da JL |
5766 | |
5767 | list_for_each_entry(lst, &lo->lo_owner.so_stateids, st_perstateowner) { | |
3d0fabd5 TM |
5768 | if (lst->st_stid.sc_file == fp) { |
5769 | atomic_inc(&lst->st_stid.sc_count); | |
c53530da | 5770 | return lst; |
3d0fabd5 | 5771 | } |
c53530da JL |
5772 | } |
5773 | return NULL; | |
5774 | } | |
5775 | ||
356a95ec JL |
5776 | static struct nfs4_ol_stateid * |
5777 | find_or_create_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fi, | |
5778 | struct inode *inode, struct nfs4_ol_stateid *ost, | |
5779 | bool *new) | |
5780 | { | |
5781 | struct nfs4_stid *ns = NULL; | |
5782 | struct nfs4_ol_stateid *lst; | |
5783 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); | |
5784 | struct nfs4_client *clp = oo->oo_owner.so_client; | |
5785 | ||
5786 | spin_lock(&clp->cl_lock); | |
5787 | lst = find_lock_stateid(lo, fi); | |
5788 | if (lst == NULL) { | |
5789 | spin_unlock(&clp->cl_lock); | |
d19fb70d | 5790 | ns = nfs4_alloc_stid(clp, stateid_slab, nfs4_free_lock_stateid); |
356a95ec JL |
5791 | if (ns == NULL) |
5792 | return NULL; | |
5793 | ||
5794 | spin_lock(&clp->cl_lock); | |
5795 | lst = find_lock_stateid(lo, fi); | |
5796 | if (likely(!lst)) { | |
5797 | lst = openlockstateid(ns); | |
5798 | init_lock_stateid(lst, lo, fi, inode, ost); | |
5799 | ns = NULL; | |
5800 | *new = true; | |
5801 | } | |
5802 | } | |
5803 | spin_unlock(&clp->cl_lock); | |
5804 | if (ns) | |
5805 | nfs4_put_stid(ns); | |
5806 | return lst; | |
5807 | } | |
c53530da | 5808 | |
fd39ca9a | 5809 | static int |
1da177e4 LT |
5810 | check_lock_length(u64 offset, u64 length) |
5811 | { | |
e7969315 KM |
5812 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
5813 | (length > ~offset))); | |
1da177e4 LT |
5814 | } |
5815 | ||
dcef0413 | 5816 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 | 5817 | { |
11b9164a | 5818 | struct nfs4_file *fp = lock_stp->st_stid.sc_file; |
0997b173 | 5819 | |
7214e860 JL |
5820 | lockdep_assert_held(&fp->fi_lock); |
5821 | ||
82c5ff1b | 5822 | if (test_access(access, lock_stp)) |
0997b173 | 5823 | return; |
12659651 | 5824 | __nfs4_file_get_access(fp, access); |
82c5ff1b | 5825 | set_access(access, lock_stp); |
0997b173 BF |
5826 | } |
5827 | ||
356a95ec JL |
5828 | static __be32 |
5829 | lookup_or_create_lock_state(struct nfsd4_compound_state *cstate, | |
5830 | struct nfs4_ol_stateid *ost, | |
5831 | struct nfsd4_lock *lock, | |
dd257933 | 5832 | struct nfs4_ol_stateid **plst, bool *new) |
64a284d0 | 5833 | { |
5db1c03f | 5834 | __be32 status; |
11b9164a | 5835 | struct nfs4_file *fi = ost->st_stid.sc_file; |
64a284d0 BF |
5836 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); |
5837 | struct nfs4_client *cl = oo->oo_owner.so_client; | |
2b0143b5 | 5838 | struct inode *inode = d_inode(cstate->current_fh.fh_dentry); |
64a284d0 | 5839 | struct nfs4_lockowner *lo; |
dd257933 | 5840 | struct nfs4_ol_stateid *lst; |
64a284d0 | 5841 | unsigned int strhashval; |
dd257933 | 5842 | bool hashed; |
64a284d0 | 5843 | |
c8623999 | 5844 | lo = find_lockowner_str(cl, &lock->lk_new_owner); |
c53530da | 5845 | if (!lo) { |
76f6c9e1 | 5846 | strhashval = ownerstr_hashval(&lock->lk_new_owner); |
c53530da JL |
5847 | lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); |
5848 | if (lo == NULL) | |
5849 | return nfserr_jukebox; | |
5850 | } else { | |
5851 | /* with an existing lockowner, seqids must be the same */ | |
5db1c03f | 5852 | status = nfserr_bad_seqid; |
c53530da JL |
5853 | if (!cstate->minorversion && |
5854 | lock->lk_new_lock_seqid != lo->lo_owner.so_seqid) | |
5db1c03f | 5855 | goto out; |
64a284d0 | 5856 | } |
c53530da | 5857 | |
dd257933 JL |
5858 | retry: |
5859 | lst = find_or_create_lock_stateid(lo, fi, inode, ost, new); | |
5860 | if (lst == NULL) { | |
5db1c03f JL |
5861 | status = nfserr_jukebox; |
5862 | goto out; | |
64a284d0 | 5863 | } |
dd257933 JL |
5864 | |
5865 | mutex_lock(&lst->st_mutex); | |
5866 | ||
5867 | /* See if it's still hashed to avoid race with FREE_STATEID */ | |
5868 | spin_lock(&cl->cl_lock); | |
5869 | hashed = !list_empty(&lst->st_perfile); | |
5870 | spin_unlock(&cl->cl_lock); | |
5871 | ||
5872 | if (!hashed) { | |
5873 | mutex_unlock(&lst->st_mutex); | |
5874 | nfs4_put_stid(&lst->st_stid); | |
5875 | goto retry; | |
5876 | } | |
5db1c03f | 5877 | status = nfs_ok; |
dd257933 | 5878 | *plst = lst; |
5db1c03f JL |
5879 | out: |
5880 | nfs4_put_stateowner(&lo->lo_owner); | |
5881 | return status; | |
64a284d0 BF |
5882 | } |
5883 | ||
1da177e4 LT |
5884 | /* |
5885 | * LOCK operation | |
5886 | */ | |
b37ad28b | 5887 | __be32 |
ca364317 | 5888 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 5889 | union nfsd4_op_u *u) |
1da177e4 | 5890 | { |
eb69853d | 5891 | struct nfsd4_lock *lock = &u->lock; |
fe0750e5 BF |
5892 | struct nfs4_openowner *open_sop = NULL; |
5893 | struct nfs4_lockowner *lock_sop = NULL; | |
3d0fabd5 | 5894 | struct nfs4_ol_stateid *lock_stp = NULL; |
0667b1e9 | 5895 | struct nfs4_ol_stateid *open_stp = NULL; |
7214e860 | 5896 | struct nfs4_file *fp; |
7d947842 | 5897 | struct file *filp = NULL; |
76d348fa | 5898 | struct nfsd4_blocked_lock *nbl = NULL; |
21179d81 JL |
5899 | struct file_lock *file_lock = NULL; |
5900 | struct file_lock *conflock = NULL; | |
b37ad28b | 5901 | __be32 status = 0; |
b34f27aa | 5902 | int lkflg; |
b8dd7b9a | 5903 | int err; |
5db1c03f | 5904 | bool new = false; |
76d348fa JL |
5905 | unsigned char fl_type; |
5906 | unsigned int fl_flags = FL_POSIX; | |
3320fef1 SK |
5907 | struct net *net = SVC_NET(rqstp); |
5908 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 LT |
5909 | |
5910 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
5911 | (long long) lock->lk_offset, | |
5912 | (long long) lock->lk_length); | |
5913 | ||
1da177e4 LT |
5914 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
5915 | return nfserr_inval; | |
5916 | ||
ca364317 | 5917 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 5918 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
5919 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
5920 | return status; | |
5921 | } | |
5922 | ||
1da177e4 | 5923 | if (lock->lk_is_new) { |
684e5638 BF |
5924 | if (nfsd4_has_session(cstate)) |
5925 | /* See rfc 5661 18.10.3: given clientid is ignored: */ | |
76f6c9e1 | 5926 | memcpy(&lock->lk_new_clientid, |
684e5638 BF |
5927 | &cstate->session->se_client->cl_clientid, |
5928 | sizeof(clientid_t)); | |
5929 | ||
1da177e4 | 5930 | status = nfserr_stale_clientid; |
2c142baa | 5931 | if (STALE_CLIENTID(&lock->lk_new_clientid, nn)) |
1da177e4 | 5932 | goto out; |
1da177e4 | 5933 | |
1da177e4 | 5934 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 5935 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
5936 | lock->lk_new_open_seqid, |
5937 | &lock->lk_new_open_stateid, | |
3320fef1 | 5938 | &open_stp, nn); |
37515177 | 5939 | if (status) |
1da177e4 | 5940 | goto out; |
feb9dad5 | 5941 | mutex_unlock(&open_stp->st_mutex); |
fe0750e5 | 5942 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 5943 | status = nfserr_bad_stateid; |
684e5638 | 5944 | if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
76f6c9e1 | 5945 | &lock->lk_new_clientid)) |
b34f27aa | 5946 | goto out; |
64a284d0 | 5947 | status = lookup_or_create_lock_state(cstate, open_stp, lock, |
5db1c03f | 5948 | &lock_stp, &new); |
3d0fabd5 | 5949 | } else { |
dd453dfd | 5950 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
5951 | lock->lk_old_lock_seqid, |
5952 | &lock->lk_old_lock_stateid, | |
3320fef1 | 5953 | NFS4_LOCK_STID, &lock_stp, nn); |
3d0fabd5 | 5954 | } |
e1aaa891 BF |
5955 | if (status) |
5956 | goto out; | |
64a284d0 | 5957 | lock_sop = lockowner(lock_stp->st_stateowner); |
1da177e4 | 5958 | |
b34f27aa BF |
5959 | lkflg = setlkflg(lock->lk_type); |
5960 | status = nfs4_check_openmode(lock_stp, lkflg); | |
5961 | if (status) | |
5962 | goto out; | |
5963 | ||
0dd395dc | 5964 | status = nfserr_grace; |
3320fef1 | 5965 | if (locks_in_grace(net) && !lock->lk_reclaim) |
0dd395dc N |
5966 | goto out; |
5967 | status = nfserr_no_grace; | |
3320fef1 | 5968 | if (!locks_in_grace(net) && lock->lk_reclaim) |
0dd395dc N |
5969 | goto out; |
5970 | ||
11b9164a | 5971 | fp = lock_stp->st_stid.sc_file; |
1da177e4 | 5972 | switch (lock->lk_type) { |
1da177e4 | 5973 | case NFS4_READW_LT: |
76d348fa JL |
5974 | if (nfsd4_has_session(cstate)) |
5975 | fl_flags |= FL_SLEEP; | |
5976 | /* Fallthrough */ | |
5977 | case NFS4_READ_LT: | |
7214e860 JL |
5978 | spin_lock(&fp->fi_lock); |
5979 | filp = find_readable_file_locked(fp); | |
0997b173 BF |
5980 | if (filp) |
5981 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
7214e860 | 5982 | spin_unlock(&fp->fi_lock); |
76d348fa | 5983 | fl_type = F_RDLCK; |
529d7b2a | 5984 | break; |
1da177e4 | 5985 | case NFS4_WRITEW_LT: |
76d348fa JL |
5986 | if (nfsd4_has_session(cstate)) |
5987 | fl_flags |= FL_SLEEP; | |
5988 | /* Fallthrough */ | |
5989 | case NFS4_WRITE_LT: | |
7214e860 JL |
5990 | spin_lock(&fp->fi_lock); |
5991 | filp = find_writeable_file_locked(fp); | |
0997b173 BF |
5992 | if (filp) |
5993 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
7214e860 | 5994 | spin_unlock(&fp->fi_lock); |
76d348fa | 5995 | fl_type = F_WRLCK; |
529d7b2a | 5996 | break; |
1da177e4 LT |
5997 | default: |
5998 | status = nfserr_inval; | |
5999 | goto out; | |
6000 | } | |
76d348fa | 6001 | |
f9d7562f BF |
6002 | if (!filp) { |
6003 | status = nfserr_openmode; | |
6004 | goto out; | |
6005 | } | |
aef9583b | 6006 | |
76d348fa JL |
6007 | nbl = find_or_allocate_block(lock_sop, &fp->fi_fhandle, nn); |
6008 | if (!nbl) { | |
6009 | dprintk("NFSD: %s: unable to allocate block!\n", __func__); | |
6010 | status = nfserr_jukebox; | |
6011 | goto out; | |
6012 | } | |
6013 | ||
6014 | file_lock = &nbl->nbl_lock; | |
6015 | file_lock->fl_type = fl_type; | |
aef9583b | 6016 | file_lock->fl_owner = (fl_owner_t)lockowner(nfs4_get_stateowner(&lock_sop->lo_owner)); |
21179d81 JL |
6017 | file_lock->fl_pid = current->tgid; |
6018 | file_lock->fl_file = filp; | |
76d348fa | 6019 | file_lock->fl_flags = fl_flags; |
21179d81 JL |
6020 | file_lock->fl_lmops = &nfsd_posix_mng_ops; |
6021 | file_lock->fl_start = lock->lk_offset; | |
6022 | file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); | |
6023 | nfs4_transform_lock_offset(file_lock); | |
6024 | ||
6025 | conflock = locks_alloc_lock(); | |
6026 | if (!conflock) { | |
6027 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
6028 | status = nfserr_jukebox; | |
6029 | goto out; | |
6030 | } | |
1da177e4 | 6031 | |
76d348fa | 6032 | if (fl_flags & FL_SLEEP) { |
7919d0a2 | 6033 | nbl->nbl_time = jiffies; |
0cc11a61 | 6034 | spin_lock(&nn->blocked_locks_lock); |
76d348fa | 6035 | list_add_tail(&nbl->nbl_list, &lock_sop->lo_blocked); |
7919d0a2 | 6036 | list_add_tail(&nbl->nbl_lru, &nn->blocked_locks_lru); |
0cc11a61 | 6037 | spin_unlock(&nn->blocked_locks_lock); |
76d348fa JL |
6038 | } |
6039 | ||
21179d81 | 6040 | err = vfs_lock_file(filp, F_SETLK, file_lock, conflock); |
76d348fa | 6041 | switch (err) { |
1da177e4 | 6042 | case 0: /* success! */ |
9767feb2 | 6043 | nfs4_inc_and_copy_stateid(&lock->lk_resp_stateid, &lock_stp->st_stid); |
b8dd7b9a | 6044 | status = 0; |
eb76b3fd | 6045 | break; |
76d348fa JL |
6046 | case FILE_LOCK_DEFERRED: |
6047 | nbl = NULL; | |
6048 | /* Fallthrough */ | |
6049 | case -EAGAIN: /* conflock holds conflicting lock */ | |
eb76b3fd AA |
6050 | status = nfserr_denied; |
6051 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
21179d81 | 6052 | nfs4_set_lock_denied(conflock, &lock->lk_denied); |
eb76b3fd | 6053 | break; |
76d348fa | 6054 | case -EDEADLK: |
1da177e4 | 6055 | status = nfserr_deadlock; |
eb76b3fd | 6056 | break; |
3e772463 | 6057 | default: |
fd85b817 | 6058 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 6059 | status = nfserrno(err); |
eb76b3fd | 6060 | break; |
1da177e4 | 6061 | } |
1da177e4 | 6062 | out: |
76d348fa JL |
6063 | if (nbl) { |
6064 | /* dequeue it if we queued it before */ | |
6065 | if (fl_flags & FL_SLEEP) { | |
0cc11a61 | 6066 | spin_lock(&nn->blocked_locks_lock); |
76d348fa | 6067 | list_del_init(&nbl->nbl_list); |
7919d0a2 | 6068 | list_del_init(&nbl->nbl_lru); |
0cc11a61 | 6069 | spin_unlock(&nn->blocked_locks_lock); |
76d348fa JL |
6070 | } |
6071 | free_blocked_lock(nbl); | |
6072 | } | |
de18643d TM |
6073 | if (filp) |
6074 | fput(filp); | |
5db1c03f JL |
6075 | if (lock_stp) { |
6076 | /* Bump seqid manually if the 4.0 replay owner is openowner */ | |
6077 | if (cstate->replay_owner && | |
6078 | cstate->replay_owner != &lock_sop->lo_owner && | |
6079 | seqid_mutating_err(ntohl(status))) | |
6080 | lock_sop->lo_owner.so_seqid++; | |
6081 | ||
feb9dad5 | 6082 | mutex_unlock(&lock_stp->st_mutex); |
35a92fe8 | 6083 | |
5db1c03f JL |
6084 | /* |
6085 | * If this is a new, never-before-used stateid, and we are | |
6086 | * returning an error, then just go ahead and release it. | |
6087 | */ | |
6088 | if (status && new) | |
6089 | release_lock_stateid(lock_stp); | |
6090 | ||
3d0fabd5 | 6091 | nfs4_put_stid(&lock_stp->st_stid); |
5db1c03f | 6092 | } |
0667b1e9 TM |
6093 | if (open_stp) |
6094 | nfs4_put_stid(&open_stp->st_stid); | |
9411b1d4 | 6095 | nfsd4_bump_seqid(cstate, status); |
21179d81 JL |
6096 | if (conflock) |
6097 | locks_free_lock(conflock); | |
1da177e4 LT |
6098 | return status; |
6099 | } | |
6100 | ||
55ef1274 BF |
6101 | /* |
6102 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
6103 | * so we do a temporary open here just to get an open file to pass to | |
6104 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
6105 | * inode operation.) | |
6106 | */ | |
04da6e9d | 6107 | static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) |
55ef1274 BF |
6108 | { |
6109 | struct file *file; | |
04da6e9d AV |
6110 | __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); |
6111 | if (!err) { | |
6112 | err = nfserrno(vfs_test_lock(file, lock)); | |
fd891454 | 6113 | fput(file); |
04da6e9d | 6114 | } |
55ef1274 BF |
6115 | return err; |
6116 | } | |
6117 | ||
1da177e4 LT |
6118 | /* |
6119 | * LOCKT operation | |
6120 | */ | |
b37ad28b | 6121 | __be32 |
ca364317 | 6122 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 6123 | union nfsd4_op_u *u) |
1da177e4 | 6124 | { |
eb69853d | 6125 | struct nfsd4_lockt *lockt = &u->lockt; |
21179d81 | 6126 | struct file_lock *file_lock = NULL; |
5db1c03f | 6127 | struct nfs4_lockowner *lo = NULL; |
b37ad28b | 6128 | __be32 status; |
7f2210fa | 6129 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 6130 | |
5ccb0066 | 6131 | if (locks_in_grace(SVC_NET(rqstp))) |
1da177e4 LT |
6132 | return nfserr_grace; |
6133 | ||
6134 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
6135 | return nfserr_inval; | |
6136 | ||
9b2ef62b | 6137 | if (!nfsd4_has_session(cstate)) { |
4b24ca7d | 6138 | status = lookup_clientid(&lockt->lt_clientid, cstate, nn); |
9b2ef62b BF |
6139 | if (status) |
6140 | goto out; | |
6141 | } | |
1da177e4 | 6142 | |
75c096f7 | 6143 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 6144 | goto out; |
1da177e4 | 6145 | |
21179d81 JL |
6146 | file_lock = locks_alloc_lock(); |
6147 | if (!file_lock) { | |
6148 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
6149 | status = nfserr_jukebox; | |
6150 | goto out; | |
6151 | } | |
6cd90662 | 6152 | |
1da177e4 LT |
6153 | switch (lockt->lt_type) { |
6154 | case NFS4_READ_LT: | |
6155 | case NFS4_READW_LT: | |
21179d81 | 6156 | file_lock->fl_type = F_RDLCK; |
1da177e4 LT |
6157 | break; |
6158 | case NFS4_WRITE_LT: | |
6159 | case NFS4_WRITEW_LT: | |
21179d81 | 6160 | file_lock->fl_type = F_WRLCK; |
1da177e4 LT |
6161 | break; |
6162 | default: | |
2fdada03 | 6163 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
6164 | status = nfserr_inval; |
6165 | goto out; | |
6166 | } | |
6167 | ||
c8623999 | 6168 | lo = find_lockowner_str(cstate->clp, &lockt->lt_owner); |
fe0750e5 | 6169 | if (lo) |
21179d81 JL |
6170 | file_lock->fl_owner = (fl_owner_t)lo; |
6171 | file_lock->fl_pid = current->tgid; | |
6172 | file_lock->fl_flags = FL_POSIX; | |
1da177e4 | 6173 | |
21179d81 JL |
6174 | file_lock->fl_start = lockt->lt_offset; |
6175 | file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); | |
1da177e4 | 6176 | |
21179d81 | 6177 | nfs4_transform_lock_offset(file_lock); |
1da177e4 | 6178 | |
21179d81 | 6179 | status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock); |
04da6e9d | 6180 | if (status) |
fd85b817 | 6181 | goto out; |
04da6e9d | 6182 | |
21179d81 | 6183 | if (file_lock->fl_type != F_UNLCK) { |
1da177e4 | 6184 | status = nfserr_denied; |
21179d81 | 6185 | nfs4_set_lock_denied(file_lock, &lockt->lt_denied); |
1da177e4 LT |
6186 | } |
6187 | out: | |
5db1c03f JL |
6188 | if (lo) |
6189 | nfs4_put_stateowner(&lo->lo_owner); | |
21179d81 JL |
6190 | if (file_lock) |
6191 | locks_free_lock(file_lock); | |
1da177e4 LT |
6192 | return status; |
6193 | } | |
6194 | ||
b37ad28b | 6195 | __be32 |
ca364317 | 6196 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 6197 | union nfsd4_op_u *u) |
1da177e4 | 6198 | { |
eb69853d | 6199 | struct nfsd4_locku *locku = &u->locku; |
dcef0413 | 6200 | struct nfs4_ol_stateid *stp; |
1da177e4 | 6201 | struct file *filp = NULL; |
21179d81 | 6202 | struct file_lock *file_lock = NULL; |
b37ad28b | 6203 | __be32 status; |
b8dd7b9a | 6204 | int err; |
3320fef1 SK |
6205 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
6206 | ||
1da177e4 LT |
6207 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", |
6208 | (long long) locku->lu_offset, | |
6209 | (long long) locku->lu_length); | |
6210 | ||
6211 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
6212 | return nfserr_inval; | |
6213 | ||
9072d5c6 | 6214 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
3320fef1 SK |
6215 | &locku->lu_stateid, NFS4_LOCK_STID, |
6216 | &stp, nn); | |
9072d5c6 | 6217 | if (status) |
1da177e4 | 6218 | goto out; |
11b9164a | 6219 | filp = find_any_file(stp->st_stid.sc_file); |
f9d7562f BF |
6220 | if (!filp) { |
6221 | status = nfserr_lock_range; | |
858cc573 | 6222 | goto put_stateid; |
f9d7562f | 6223 | } |
21179d81 JL |
6224 | file_lock = locks_alloc_lock(); |
6225 | if (!file_lock) { | |
6226 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
6227 | status = nfserr_jukebox; | |
de18643d | 6228 | goto fput; |
21179d81 | 6229 | } |
6cd90662 | 6230 | |
21179d81 | 6231 | file_lock->fl_type = F_UNLCK; |
aef9583b | 6232 | file_lock->fl_owner = (fl_owner_t)lockowner(nfs4_get_stateowner(stp->st_stateowner)); |
21179d81 JL |
6233 | file_lock->fl_pid = current->tgid; |
6234 | file_lock->fl_file = filp; | |
6235 | file_lock->fl_flags = FL_POSIX; | |
6236 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
6237 | file_lock->fl_start = locku->lu_offset; | |
6238 | ||
6239 | file_lock->fl_end = last_byte_offset(locku->lu_offset, | |
6240 | locku->lu_length); | |
6241 | nfs4_transform_lock_offset(file_lock); | |
1da177e4 | 6242 | |
21179d81 | 6243 | err = vfs_lock_file(filp, F_SETLK, file_lock, NULL); |
b8dd7b9a | 6244 | if (err) { |
fd85b817 | 6245 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
6246 | goto out_nfserr; |
6247 | } | |
9767feb2 | 6248 | nfs4_inc_and_copy_stateid(&locku->lu_stateid, &stp->st_stid); |
de18643d TM |
6249 | fput: |
6250 | fput(filp); | |
858cc573 | 6251 | put_stateid: |
feb9dad5 | 6252 | mutex_unlock(&stp->st_mutex); |
858cc573 | 6253 | nfs4_put_stid(&stp->st_stid); |
1da177e4 | 6254 | out: |
9411b1d4 | 6255 | nfsd4_bump_seqid(cstate, status); |
21179d81 JL |
6256 | if (file_lock) |
6257 | locks_free_lock(file_lock); | |
1da177e4 LT |
6258 | return status; |
6259 | ||
6260 | out_nfserr: | |
b8dd7b9a | 6261 | status = nfserrno(err); |
de18643d | 6262 | goto fput; |
1da177e4 LT |
6263 | } |
6264 | ||
6265 | /* | |
6266 | * returns | |
f9c00c3a JL |
6267 | * true: locks held by lockowner |
6268 | * false: no locks held by lockowner | |
1da177e4 | 6269 | */ |
f9c00c3a JL |
6270 | static bool |
6271 | check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner) | |
1da177e4 | 6272 | { |
bd61e0a9 | 6273 | struct file_lock *fl; |
f9c00c3a JL |
6274 | int status = false; |
6275 | struct file *filp = find_any_file(fp); | |
6276 | struct inode *inode; | |
bd61e0a9 | 6277 | struct file_lock_context *flctx; |
f9c00c3a JL |
6278 | |
6279 | if (!filp) { | |
6280 | /* Any valid lock stateid should have some sort of access */ | |
6281 | WARN_ON_ONCE(1); | |
6282 | return status; | |
6283 | } | |
6284 | ||
6285 | inode = file_inode(filp); | |
bd61e0a9 JL |
6286 | flctx = inode->i_flctx; |
6287 | ||
6288 | if (flctx && !list_empty_careful(&flctx->flc_posix)) { | |
6109c850 | 6289 | spin_lock(&flctx->flc_lock); |
bd61e0a9 JL |
6290 | list_for_each_entry(fl, &flctx->flc_posix, fl_list) { |
6291 | if (fl->fl_owner == (fl_owner_t)lowner) { | |
6292 | status = true; | |
6293 | break; | |
6294 | } | |
796dadfd | 6295 | } |
6109c850 | 6296 | spin_unlock(&flctx->flc_lock); |
1da177e4 | 6297 | } |
f9c00c3a | 6298 | fput(filp); |
1da177e4 LT |
6299 | return status; |
6300 | } | |
6301 | ||
b37ad28b | 6302 | __be32 |
b591480b BF |
6303 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
6304 | struct nfsd4_compound_state *cstate, | |
eb69853d | 6305 | union nfsd4_op_u *u) |
1da177e4 | 6306 | { |
eb69853d | 6307 | struct nfsd4_release_lockowner *rlockowner = &u->release_lockowner; |
1da177e4 | 6308 | clientid_t *clid = &rlockowner->rl_clientid; |
882e9d25 JL |
6309 | struct nfs4_stateowner *sop; |
6310 | struct nfs4_lockowner *lo = NULL; | |
dcef0413 | 6311 | struct nfs4_ol_stateid *stp; |
1da177e4 | 6312 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
d4f0489f | 6313 | unsigned int hashval = ownerstr_hashval(owner); |
b37ad28b | 6314 | __be32 status; |
7f2210fa | 6315 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
c58c6610 | 6316 | struct nfs4_client *clp; |
88584818 | 6317 | LIST_HEAD (reaplist); |
1da177e4 LT |
6318 | |
6319 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
6320 | clid->cl_boot, clid->cl_id); | |
6321 | ||
4b24ca7d | 6322 | status = lookup_clientid(clid, cstate, nn); |
9b2ef62b | 6323 | if (status) |
51f5e783 | 6324 | return status; |
9b2ef62b | 6325 | |
d4f0489f | 6326 | clp = cstate->clp; |
fd44907c | 6327 | /* Find the matching lock stateowner */ |
d4f0489f | 6328 | spin_lock(&clp->cl_lock); |
882e9d25 | 6329 | list_for_each_entry(sop, &clp->cl_ownerstr_hashtbl[hashval], |
d4f0489f | 6330 | so_strhash) { |
fd44907c | 6331 | |
882e9d25 JL |
6332 | if (sop->so_is_open_owner || !same_owner_str(sop, owner)) |
6333 | continue; | |
fd44907c | 6334 | |
882e9d25 JL |
6335 | /* see if there are still any locks associated with it */ |
6336 | lo = lockowner(sop); | |
6337 | list_for_each_entry(stp, &sop->so_stateids, st_perstateowner) { | |
6338 | if (check_for_locks(stp->st_stid.sc_file, lo)) { | |
6339 | status = nfserr_locks_held; | |
6340 | spin_unlock(&clp->cl_lock); | |
51f5e783 | 6341 | return status; |
882e9d25 | 6342 | } |
5adfd885 | 6343 | } |
882e9d25 | 6344 | |
b5971afa | 6345 | nfs4_get_stateowner(sop); |
882e9d25 | 6346 | break; |
1da177e4 | 6347 | } |
88584818 CL |
6348 | if (!lo) { |
6349 | spin_unlock(&clp->cl_lock); | |
6350 | return status; | |
6351 | } | |
6352 | ||
6353 | unhash_lockowner_locked(lo); | |
6354 | while (!list_empty(&lo->lo_owner.so_stateids)) { | |
6355 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
6356 | struct nfs4_ol_stateid, | |
6357 | st_perstateowner); | |
6358 | WARN_ON(!unhash_lock_stateid(stp)); | |
6359 | put_ol_stateid_locked(stp, &reaplist); | |
6360 | } | |
c58c6610 | 6361 | spin_unlock(&clp->cl_lock); |
88584818 | 6362 | free_ol_stateid_reaplist(&reaplist); |
797bfd05 | 6363 | remove_blocked_locks(lo); |
88584818 CL |
6364 | nfs4_put_stateowner(&lo->lo_owner); |
6365 | ||
1da177e4 LT |
6366 | return status; |
6367 | } | |
6368 | ||
6369 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 6370 | alloc_reclaim(void) |
1da177e4 | 6371 | { |
a55370a3 | 6372 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
6373 | } |
6374 | ||
0ce0c2b5 | 6375 | bool |
52e19c09 | 6376 | nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn) |
c7b9a459 | 6377 | { |
0ce0c2b5 | 6378 | struct nfs4_client_reclaim *crp; |
c7b9a459 | 6379 | |
52e19c09 | 6380 | crp = nfsd4_find_reclaim_client(name, nn); |
0ce0c2b5 | 6381 | return (crp && crp->cr_clp); |
c7b9a459 N |
6382 | } |
6383 | ||
1da177e4 LT |
6384 | /* |
6385 | * failure => all reset bets are off, nfserr_no_grace... | |
6386 | */ | |
772a9bbb | 6387 | struct nfs4_client_reclaim * |
52e19c09 | 6388 | nfs4_client_to_reclaim(const char *name, struct nfsd_net *nn) |
1da177e4 LT |
6389 | { |
6390 | unsigned int strhashval; | |
772a9bbb | 6391 | struct nfs4_client_reclaim *crp; |
1da177e4 | 6392 | |
a55370a3 N |
6393 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
6394 | crp = alloc_reclaim(); | |
772a9bbb JL |
6395 | if (crp) { |
6396 | strhashval = clientstr_hashval(name); | |
6397 | INIT_LIST_HEAD(&crp->cr_strhash); | |
52e19c09 | 6398 | list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]); |
772a9bbb | 6399 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
0ce0c2b5 | 6400 | crp->cr_clp = NULL; |
52e19c09 | 6401 | nn->reclaim_str_hashtbl_size++; |
772a9bbb JL |
6402 | } |
6403 | return crp; | |
1da177e4 LT |
6404 | } |
6405 | ||
ce30e539 | 6406 | void |
52e19c09 | 6407 | nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn) |
ce30e539 JL |
6408 | { |
6409 | list_del(&crp->cr_strhash); | |
6410 | kfree(crp); | |
52e19c09 | 6411 | nn->reclaim_str_hashtbl_size--; |
ce30e539 JL |
6412 | } |
6413 | ||
2a4317c5 | 6414 | void |
52e19c09 | 6415 | nfs4_release_reclaim(struct nfsd_net *nn) |
1da177e4 LT |
6416 | { |
6417 | struct nfs4_client_reclaim *crp = NULL; | |
6418 | int i; | |
6419 | ||
1da177e4 | 6420 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
52e19c09 SK |
6421 | while (!list_empty(&nn->reclaim_str_hashtbl[i])) { |
6422 | crp = list_entry(nn->reclaim_str_hashtbl[i].next, | |
1da177e4 | 6423 | struct nfs4_client_reclaim, cr_strhash); |
52e19c09 | 6424 | nfs4_remove_reclaim_record(crp, nn); |
1da177e4 LT |
6425 | } |
6426 | } | |
063b0fb9 | 6427 | WARN_ON_ONCE(nn->reclaim_str_hashtbl_size); |
1da177e4 LT |
6428 | } |
6429 | ||
6430 | /* | |
6431 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
2a4317c5 | 6432 | struct nfs4_client_reclaim * |
52e19c09 | 6433 | nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn) |
1da177e4 LT |
6434 | { |
6435 | unsigned int strhashval; | |
1da177e4 LT |
6436 | struct nfs4_client_reclaim *crp = NULL; |
6437 | ||
278c931c | 6438 | dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir); |
1da177e4 | 6439 | |
278c931c | 6440 | strhashval = clientstr_hashval(recdir); |
52e19c09 | 6441 | list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) { |
278c931c | 6442 | if (same_name(crp->cr_recdir, recdir)) { |
1da177e4 LT |
6443 | return crp; |
6444 | } | |
6445 | } | |
6446 | return NULL; | |
6447 | } | |
6448 | ||
6449 | /* | |
6450 | * Called from OPEN. Look for clientid in reclaim list. | |
6451 | */ | |
b37ad28b | 6452 | __be32 |
0fe492db TM |
6453 | nfs4_check_open_reclaim(clientid_t *clid, |
6454 | struct nfsd4_compound_state *cstate, | |
6455 | struct nfsd_net *nn) | |
1da177e4 | 6456 | { |
0fe492db | 6457 | __be32 status; |
a52d726b JL |
6458 | |
6459 | /* find clientid in conf_id_hashtbl */ | |
0fe492db TM |
6460 | status = lookup_clientid(clid, cstate, nn); |
6461 | if (status) | |
a52d726b JL |
6462 | return nfserr_reclaim_bad; |
6463 | ||
3b3e7b72 JL |
6464 | if (test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, &cstate->clp->cl_flags)) |
6465 | return nfserr_no_grace; | |
6466 | ||
0fe492db TM |
6467 | if (nfsd4_client_record_check(cstate->clp)) |
6468 | return nfserr_reclaim_bad; | |
6469 | ||
6470 | return nfs_ok; | |
1da177e4 LT |
6471 | } |
6472 | ||
65178db4 | 6473 | #ifdef CONFIG_NFSD_FAULT_INJECTION |
016200c3 JL |
6474 | static inline void |
6475 | put_client(struct nfs4_client *clp) | |
6476 | { | |
6477 | atomic_dec(&clp->cl_refcount); | |
6478 | } | |
6479 | ||
285abdee JL |
6480 | static struct nfs4_client * |
6481 | nfsd_find_client(struct sockaddr_storage *addr, size_t addr_size) | |
6482 | { | |
6483 | struct nfs4_client *clp; | |
6484 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6485 | nfsd_net_id); | |
6486 | ||
6487 | if (!nfsd_netns_ready(nn)) | |
6488 | return NULL; | |
6489 | ||
6490 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
6491 | if (memcmp(&clp->cl_addr, addr, addr_size) == 0) | |
6492 | return clp; | |
6493 | } | |
6494 | return NULL; | |
6495 | } | |
6496 | ||
7ec0e36f | 6497 | u64 |
285abdee | 6498 | nfsd_inject_print_clients(void) |
7ec0e36f JL |
6499 | { |
6500 | struct nfs4_client *clp; | |
6501 | u64 count = 0; | |
6502 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6503 | nfsd_net_id); | |
6504 | char buf[INET6_ADDRSTRLEN]; | |
6505 | ||
6506 | if (!nfsd_netns_ready(nn)) | |
6507 | return 0; | |
6508 | ||
6509 | spin_lock(&nn->client_lock); | |
6510 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
6511 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); | |
6512 | pr_info("NFS Client: %s\n", buf); | |
6513 | ++count; | |
6514 | } | |
6515 | spin_unlock(&nn->client_lock); | |
6516 | ||
6517 | return count; | |
6518 | } | |
65178db4 | 6519 | |
a0926d15 | 6520 | u64 |
285abdee | 6521 | nfsd_inject_forget_client(struct sockaddr_storage *addr, size_t addr_size) |
a0926d15 JL |
6522 | { |
6523 | u64 count = 0; | |
6524 | struct nfs4_client *clp; | |
6525 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6526 | nfsd_net_id); | |
6527 | ||
6528 | if (!nfsd_netns_ready(nn)) | |
6529 | return count; | |
6530 | ||
6531 | spin_lock(&nn->client_lock); | |
6532 | clp = nfsd_find_client(addr, addr_size); | |
6533 | if (clp) { | |
6534 | if (mark_client_expired_locked(clp) == nfs_ok) | |
6535 | ++count; | |
6536 | else | |
6537 | clp = NULL; | |
6538 | } | |
6539 | spin_unlock(&nn->client_lock); | |
6540 | ||
6541 | if (clp) | |
6542 | expire_client(clp); | |
6543 | ||
6544 | return count; | |
6545 | } | |
6546 | ||
69fc9edf | 6547 | u64 |
285abdee | 6548 | nfsd_inject_forget_clients(u64 max) |
69fc9edf JL |
6549 | { |
6550 | u64 count = 0; | |
6551 | struct nfs4_client *clp, *next; | |
6552 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6553 | nfsd_net_id); | |
6554 | LIST_HEAD(reaplist); | |
6555 | ||
6556 | if (!nfsd_netns_ready(nn)) | |
6557 | return count; | |
6558 | ||
6559 | spin_lock(&nn->client_lock); | |
6560 | list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { | |
6561 | if (mark_client_expired_locked(clp) == nfs_ok) { | |
6562 | list_add(&clp->cl_lru, &reaplist); | |
6563 | if (max != 0 && ++count >= max) | |
6564 | break; | |
6565 | } | |
6566 | } | |
6567 | spin_unlock(&nn->client_lock); | |
6568 | ||
6569 | list_for_each_entry_safe(clp, next, &reaplist, cl_lru) | |
6570 | expire_client(clp); | |
6571 | ||
6572 | return count; | |
6573 | } | |
6574 | ||
184c1847 BS |
6575 | static void nfsd_print_count(struct nfs4_client *clp, unsigned int count, |
6576 | const char *type) | |
6577 | { | |
6578 | char buf[INET6_ADDRSTRLEN]; | |
0a5c33e2 | 6579 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
184c1847 BS |
6580 | printk(KERN_INFO "NFS Client: %s has %u %s\n", buf, count, type); |
6581 | } | |
6582 | ||
016200c3 JL |
6583 | static void |
6584 | nfsd_inject_add_lock_to_list(struct nfs4_ol_stateid *lst, | |
6585 | struct list_head *collect) | |
6586 | { | |
6587 | struct nfs4_client *clp = lst->st_stid.sc_client; | |
6588 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6589 | nfsd_net_id); | |
6590 | ||
6591 | if (!collect) | |
6592 | return; | |
6593 | ||
6594 | lockdep_assert_held(&nn->client_lock); | |
6595 | atomic_inc(&clp->cl_refcount); | |
6596 | list_add(&lst->st_locks, collect); | |
6597 | } | |
6598 | ||
3c87b9b7 | 6599 | static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max, |
3738d50e | 6600 | struct list_head *collect, |
e8568739 | 6601 | bool (*func)(struct nfs4_ol_stateid *)) |
fc29171f BS |
6602 | { |
6603 | struct nfs4_openowner *oop; | |
fc29171f | 6604 | struct nfs4_ol_stateid *stp, *st_next; |
3c87b9b7 | 6605 | struct nfs4_ol_stateid *lst, *lst_next; |
fc29171f BS |
6606 | u64 count = 0; |
6607 | ||
016200c3 | 6608 | spin_lock(&clp->cl_lock); |
fc29171f | 6609 | list_for_each_entry(oop, &clp->cl_openowners, oo_perclient) { |
3c87b9b7 TM |
6610 | list_for_each_entry_safe(stp, st_next, |
6611 | &oop->oo_owner.so_stateids, st_perstateowner) { | |
6612 | list_for_each_entry_safe(lst, lst_next, | |
6613 | &stp->st_locks, st_locks) { | |
3738d50e | 6614 | if (func) { |
e8568739 JL |
6615 | if (func(lst)) |
6616 | nfsd_inject_add_lock_to_list(lst, | |
6617 | collect); | |
3738d50e | 6618 | } |
016200c3 JL |
6619 | ++count; |
6620 | /* | |
6621 | * Despite the fact that these functions deal | |
6622 | * with 64-bit integers for "count", we must | |
6623 | * ensure that it doesn't blow up the | |
6624 | * clp->cl_refcount. Throw a warning if we | |
6625 | * start to approach INT_MAX here. | |
6626 | */ | |
6627 | WARN_ON_ONCE(count == (INT_MAX / 2)); | |
6628 | if (count == max) | |
6629 | goto out; | |
fc29171f BS |
6630 | } |
6631 | } | |
6632 | } | |
016200c3 JL |
6633 | out: |
6634 | spin_unlock(&clp->cl_lock); | |
fc29171f BS |
6635 | |
6636 | return count; | |
6637 | } | |
6638 | ||
016200c3 JL |
6639 | static u64 |
6640 | nfsd_collect_client_locks(struct nfs4_client *clp, struct list_head *collect, | |
6641 | u64 max) | |
fc29171f | 6642 | { |
016200c3 | 6643 | return nfsd_foreach_client_lock(clp, max, collect, unhash_lock_stateid); |
fc29171f BS |
6644 | } |
6645 | ||
016200c3 JL |
6646 | static u64 |
6647 | nfsd_print_client_locks(struct nfs4_client *clp) | |
184c1847 | 6648 | { |
016200c3 | 6649 | u64 count = nfsd_foreach_client_lock(clp, 0, NULL, NULL); |
184c1847 BS |
6650 | nfsd_print_count(clp, count, "locked files"); |
6651 | return count; | |
6652 | } | |
6653 | ||
016200c3 | 6654 | u64 |
285abdee | 6655 | nfsd_inject_print_locks(void) |
016200c3 JL |
6656 | { |
6657 | struct nfs4_client *clp; | |
6658 | u64 count = 0; | |
6659 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6660 | nfsd_net_id); | |
6661 | ||
6662 | if (!nfsd_netns_ready(nn)) | |
6663 | return 0; | |
6664 | ||
6665 | spin_lock(&nn->client_lock); | |
6666 | list_for_each_entry(clp, &nn->client_lru, cl_lru) | |
6667 | count += nfsd_print_client_locks(clp); | |
6668 | spin_unlock(&nn->client_lock); | |
6669 | ||
6670 | return count; | |
6671 | } | |
6672 | ||
6673 | static void | |
6674 | nfsd_reap_locks(struct list_head *reaplist) | |
6675 | { | |
6676 | struct nfs4_client *clp; | |
6677 | struct nfs4_ol_stateid *stp, *next; | |
6678 | ||
6679 | list_for_each_entry_safe(stp, next, reaplist, st_locks) { | |
6680 | list_del_init(&stp->st_locks); | |
6681 | clp = stp->st_stid.sc_client; | |
6682 | nfs4_put_stid(&stp->st_stid); | |
6683 | put_client(clp); | |
6684 | } | |
6685 | } | |
6686 | ||
6687 | u64 | |
285abdee | 6688 | nfsd_inject_forget_client_locks(struct sockaddr_storage *addr, size_t addr_size) |
016200c3 JL |
6689 | { |
6690 | unsigned int count = 0; | |
6691 | struct nfs4_client *clp; | |
6692 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6693 | nfsd_net_id); | |
6694 | LIST_HEAD(reaplist); | |
6695 | ||
6696 | if (!nfsd_netns_ready(nn)) | |
6697 | return count; | |
6698 | ||
6699 | spin_lock(&nn->client_lock); | |
6700 | clp = nfsd_find_client(addr, addr_size); | |
6701 | if (clp) | |
6702 | count = nfsd_collect_client_locks(clp, &reaplist, 0); | |
6703 | spin_unlock(&nn->client_lock); | |
6704 | nfsd_reap_locks(&reaplist); | |
6705 | return count; | |
6706 | } | |
6707 | ||
6708 | u64 | |
285abdee | 6709 | nfsd_inject_forget_locks(u64 max) |
016200c3 JL |
6710 | { |
6711 | u64 count = 0; | |
6712 | struct nfs4_client *clp; | |
6713 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6714 | nfsd_net_id); | |
6715 | LIST_HEAD(reaplist); | |
6716 | ||
6717 | if (!nfsd_netns_ready(nn)) | |
6718 | return count; | |
6719 | ||
6720 | spin_lock(&nn->client_lock); | |
6721 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
6722 | count += nfsd_collect_client_locks(clp, &reaplist, max - count); | |
6723 | if (max != 0 && count >= max) | |
6724 | break; | |
6725 | } | |
6726 | spin_unlock(&nn->client_lock); | |
6727 | nfsd_reap_locks(&reaplist); | |
6728 | return count; | |
6729 | } | |
6730 | ||
82e05efa JL |
6731 | static u64 |
6732 | nfsd_foreach_client_openowner(struct nfs4_client *clp, u64 max, | |
6733 | struct list_head *collect, | |
6734 | void (*func)(struct nfs4_openowner *)) | |
4dbdbda8 BS |
6735 | { |
6736 | struct nfs4_openowner *oop, *next; | |
82e05efa JL |
6737 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, |
6738 | nfsd_net_id); | |
4dbdbda8 BS |
6739 | u64 count = 0; |
6740 | ||
82e05efa JL |
6741 | lockdep_assert_held(&nn->client_lock); |
6742 | ||
6743 | spin_lock(&clp->cl_lock); | |
4dbdbda8 | 6744 | list_for_each_entry_safe(oop, next, &clp->cl_openowners, oo_perclient) { |
82e05efa | 6745 | if (func) { |
4dbdbda8 | 6746 | func(oop); |
82e05efa JL |
6747 | if (collect) { |
6748 | atomic_inc(&clp->cl_refcount); | |
6749 | list_add(&oop->oo_perclient, collect); | |
6750 | } | |
6751 | } | |
6752 | ++count; | |
6753 | /* | |
6754 | * Despite the fact that these functions deal with | |
6755 | * 64-bit integers for "count", we must ensure that | |
6756 | * it doesn't blow up the clp->cl_refcount. Throw a | |
6757 | * warning if we start to approach INT_MAX here. | |
6758 | */ | |
6759 | WARN_ON_ONCE(count == (INT_MAX / 2)); | |
6760 | if (count == max) | |
4dbdbda8 BS |
6761 | break; |
6762 | } | |
82e05efa JL |
6763 | spin_unlock(&clp->cl_lock); |
6764 | ||
6765 | return count; | |
6766 | } | |
6767 | ||
6768 | static u64 | |
6769 | nfsd_print_client_openowners(struct nfs4_client *clp) | |
6770 | { | |
6771 | u64 count = nfsd_foreach_client_openowner(clp, 0, NULL, NULL); | |
6772 | ||
6773 | nfsd_print_count(clp, count, "openowners"); | |
6774 | return count; | |
6775 | } | |
6776 | ||
6777 | static u64 | |
6778 | nfsd_collect_client_openowners(struct nfs4_client *clp, | |
6779 | struct list_head *collect, u64 max) | |
6780 | { | |
6781 | return nfsd_foreach_client_openowner(clp, max, collect, | |
6782 | unhash_openowner_locked); | |
6783 | } | |
6784 | ||
6785 | u64 | |
285abdee | 6786 | nfsd_inject_print_openowners(void) |
82e05efa JL |
6787 | { |
6788 | struct nfs4_client *clp; | |
6789 | u64 count = 0; | |
6790 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6791 | nfsd_net_id); | |
6792 | ||
6793 | if (!nfsd_netns_ready(nn)) | |
6794 | return 0; | |
6795 | ||
6796 | spin_lock(&nn->client_lock); | |
6797 | list_for_each_entry(clp, &nn->client_lru, cl_lru) | |
6798 | count += nfsd_print_client_openowners(clp); | |
6799 | spin_unlock(&nn->client_lock); | |
4dbdbda8 BS |
6800 | |
6801 | return count; | |
6802 | } | |
6803 | ||
82e05efa JL |
6804 | static void |
6805 | nfsd_reap_openowners(struct list_head *reaplist) | |
6806 | { | |
6807 | struct nfs4_client *clp; | |
6808 | struct nfs4_openowner *oop, *next; | |
6809 | ||
6810 | list_for_each_entry_safe(oop, next, reaplist, oo_perclient) { | |
6811 | list_del_init(&oop->oo_perclient); | |
6812 | clp = oop->oo_owner.so_client; | |
6813 | release_openowner(oop); | |
6814 | put_client(clp); | |
6815 | } | |
6816 | } | |
6817 | ||
6818 | u64 | |
285abdee JL |
6819 | nfsd_inject_forget_client_openowners(struct sockaddr_storage *addr, |
6820 | size_t addr_size) | |
4dbdbda8 | 6821 | { |
82e05efa JL |
6822 | unsigned int count = 0; |
6823 | struct nfs4_client *clp; | |
6824 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6825 | nfsd_net_id); | |
6826 | LIST_HEAD(reaplist); | |
6827 | ||
6828 | if (!nfsd_netns_ready(nn)) | |
6829 | return count; | |
6830 | ||
6831 | spin_lock(&nn->client_lock); | |
6832 | clp = nfsd_find_client(addr, addr_size); | |
6833 | if (clp) | |
6834 | count = nfsd_collect_client_openowners(clp, &reaplist, 0); | |
6835 | spin_unlock(&nn->client_lock); | |
6836 | nfsd_reap_openowners(&reaplist); | |
6837 | return count; | |
4dbdbda8 BS |
6838 | } |
6839 | ||
82e05efa | 6840 | u64 |
285abdee | 6841 | nfsd_inject_forget_openowners(u64 max) |
184c1847 | 6842 | { |
82e05efa JL |
6843 | u64 count = 0; |
6844 | struct nfs4_client *clp; | |
6845 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6846 | nfsd_net_id); | |
6847 | LIST_HEAD(reaplist); | |
6848 | ||
6849 | if (!nfsd_netns_ready(nn)) | |
6850 | return count; | |
6851 | ||
6852 | spin_lock(&nn->client_lock); | |
6853 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
6854 | count += nfsd_collect_client_openowners(clp, &reaplist, | |
6855 | max - count); | |
6856 | if (max != 0 && count >= max) | |
6857 | break; | |
6858 | } | |
6859 | spin_unlock(&nn->client_lock); | |
6860 | nfsd_reap_openowners(&reaplist); | |
184c1847 BS |
6861 | return count; |
6862 | } | |
6863 | ||
269de30f BS |
6864 | static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max, |
6865 | struct list_head *victims) | |
6866 | { | |
6867 | struct nfs4_delegation *dp, *next; | |
98d5c7c5 JL |
6868 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, |
6869 | nfsd_net_id); | |
269de30f BS |
6870 | u64 count = 0; |
6871 | ||
98d5c7c5 JL |
6872 | lockdep_assert_held(&nn->client_lock); |
6873 | ||
6874 | spin_lock(&state_lock); | |
269de30f | 6875 | list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) { |
dff1399f JL |
6876 | if (victims) { |
6877 | /* | |
6878 | * It's not safe to mess with delegations that have a | |
6879 | * non-zero dl_time. They might have already been broken | |
6880 | * and could be processed by the laundromat outside of | |
6881 | * the state_lock. Just leave them be. | |
6882 | */ | |
6883 | if (dp->dl_time != 0) | |
6884 | continue; | |
6885 | ||
98d5c7c5 | 6886 | atomic_inc(&clp->cl_refcount); |
3fcbbd24 | 6887 | WARN_ON(!unhash_delegation_locked(dp)); |
42690676 | 6888 | list_add(&dp->dl_recall_lru, victims); |
dff1399f | 6889 | } |
98d5c7c5 JL |
6890 | ++count; |
6891 | /* | |
6892 | * Despite the fact that these functions deal with | |
6893 | * 64-bit integers for "count", we must ensure that | |
6894 | * it doesn't blow up the clp->cl_refcount. Throw a | |
6895 | * warning if we start to approach INT_MAX here. | |
6896 | */ | |
6897 | WARN_ON_ONCE(count == (INT_MAX / 2)); | |
6898 | if (count == max) | |
269de30f BS |
6899 | break; |
6900 | } | |
98d5c7c5 | 6901 | spin_unlock(&state_lock); |
269de30f BS |
6902 | return count; |
6903 | } | |
6904 | ||
98d5c7c5 JL |
6905 | static u64 |
6906 | nfsd_print_client_delegations(struct nfs4_client *clp) | |
269de30f | 6907 | { |
98d5c7c5 | 6908 | u64 count = nfsd_find_all_delegations(clp, 0, NULL); |
269de30f | 6909 | |
98d5c7c5 JL |
6910 | nfsd_print_count(clp, count, "delegations"); |
6911 | return count; | |
6912 | } | |
6913 | ||
6914 | u64 | |
285abdee | 6915 | nfsd_inject_print_delegations(void) |
98d5c7c5 JL |
6916 | { |
6917 | struct nfs4_client *clp; | |
6918 | u64 count = 0; | |
6919 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6920 | nfsd_net_id); | |
6921 | ||
6922 | if (!nfsd_netns_ready(nn)) | |
6923 | return 0; | |
269de30f | 6924 | |
98d5c7c5 JL |
6925 | spin_lock(&nn->client_lock); |
6926 | list_for_each_entry(clp, &nn->client_lru, cl_lru) | |
6927 | count += nfsd_print_client_delegations(clp); | |
6928 | spin_unlock(&nn->client_lock); | |
6929 | ||
6930 | return count; | |
6931 | } | |
6932 | ||
6933 | static void | |
6934 | nfsd_forget_delegations(struct list_head *reaplist) | |
6935 | { | |
6936 | struct nfs4_client *clp; | |
6937 | struct nfs4_delegation *dp, *next; | |
6938 | ||
6939 | list_for_each_entry_safe(dp, next, reaplist, dl_recall_lru) { | |
2d4a532d | 6940 | list_del_init(&dp->dl_recall_lru); |
98d5c7c5 | 6941 | clp = dp->dl_stid.sc_client; |
3bd64a5b | 6942 | revoke_delegation(dp); |
98d5c7c5 | 6943 | put_client(clp); |
2d4a532d | 6944 | } |
98d5c7c5 JL |
6945 | } |
6946 | ||
6947 | u64 | |
285abdee JL |
6948 | nfsd_inject_forget_client_delegations(struct sockaddr_storage *addr, |
6949 | size_t addr_size) | |
98d5c7c5 JL |
6950 | { |
6951 | u64 count = 0; | |
6952 | struct nfs4_client *clp; | |
6953 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6954 | nfsd_net_id); | |
6955 | LIST_HEAD(reaplist); | |
6956 | ||
6957 | if (!nfsd_netns_ready(nn)) | |
6958 | return count; | |
6959 | ||
6960 | spin_lock(&nn->client_lock); | |
6961 | clp = nfsd_find_client(addr, addr_size); | |
6962 | if (clp) | |
6963 | count = nfsd_find_all_delegations(clp, 0, &reaplist); | |
6964 | spin_unlock(&nn->client_lock); | |
6965 | ||
6966 | nfsd_forget_delegations(&reaplist); | |
6967 | return count; | |
6968 | } | |
269de30f | 6969 | |
98d5c7c5 | 6970 | u64 |
285abdee | 6971 | nfsd_inject_forget_delegations(u64 max) |
98d5c7c5 JL |
6972 | { |
6973 | u64 count = 0; | |
6974 | struct nfs4_client *clp; | |
6975 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6976 | nfsd_net_id); | |
6977 | LIST_HEAD(reaplist); | |
6978 | ||
6979 | if (!nfsd_netns_ready(nn)) | |
6980 | return count; | |
6981 | ||
6982 | spin_lock(&nn->client_lock); | |
6983 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
6984 | count += nfsd_find_all_delegations(clp, max - count, &reaplist); | |
6985 | if (max != 0 && count >= max) | |
6986 | break; | |
6987 | } | |
6988 | spin_unlock(&nn->client_lock); | |
6989 | nfsd_forget_delegations(&reaplist); | |
269de30f BS |
6990 | return count; |
6991 | } | |
6992 | ||
98d5c7c5 JL |
6993 | static void |
6994 | nfsd_recall_delegations(struct list_head *reaplist) | |
269de30f | 6995 | { |
98d5c7c5 JL |
6996 | struct nfs4_client *clp; |
6997 | struct nfs4_delegation *dp, *next; | |
269de30f | 6998 | |
98d5c7c5 | 6999 | list_for_each_entry_safe(dp, next, reaplist, dl_recall_lru) { |
dff1399f | 7000 | list_del_init(&dp->dl_recall_lru); |
98d5c7c5 JL |
7001 | clp = dp->dl_stid.sc_client; |
7002 | /* | |
7003 | * We skipped all entries that had a zero dl_time before, | |
7004 | * so we can now reset the dl_time back to 0. If a delegation | |
7005 | * break comes in now, then it won't make any difference since | |
7006 | * we're recalling it either way. | |
7007 | */ | |
7008 | spin_lock(&state_lock); | |
dff1399f | 7009 | dp->dl_time = 0; |
98d5c7c5 | 7010 | spin_unlock(&state_lock); |
269de30f | 7011 | nfsd_break_one_deleg(dp); |
98d5c7c5 | 7012 | put_client(clp); |
dff1399f | 7013 | } |
98d5c7c5 | 7014 | } |
269de30f | 7015 | |
98d5c7c5 | 7016 | u64 |
285abdee | 7017 | nfsd_inject_recall_client_delegations(struct sockaddr_storage *addr, |
98d5c7c5 JL |
7018 | size_t addr_size) |
7019 | { | |
7020 | u64 count = 0; | |
7021 | struct nfs4_client *clp; | |
7022 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
7023 | nfsd_net_id); | |
7024 | LIST_HEAD(reaplist); | |
7025 | ||
7026 | if (!nfsd_netns_ready(nn)) | |
7027 | return count; | |
7028 | ||
7029 | spin_lock(&nn->client_lock); | |
7030 | clp = nfsd_find_client(addr, addr_size); | |
7031 | if (clp) | |
7032 | count = nfsd_find_all_delegations(clp, 0, &reaplist); | |
7033 | spin_unlock(&nn->client_lock); | |
7034 | ||
7035 | nfsd_recall_delegations(&reaplist); | |
269de30f BS |
7036 | return count; |
7037 | } | |
7038 | ||
98d5c7c5 | 7039 | u64 |
285abdee | 7040 | nfsd_inject_recall_delegations(u64 max) |
184c1847 BS |
7041 | { |
7042 | u64 count = 0; | |
98d5c7c5 JL |
7043 | struct nfs4_client *clp, *next; |
7044 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
7045 | nfsd_net_id); | |
7046 | LIST_HEAD(reaplist); | |
184c1847 | 7047 | |
98d5c7c5 JL |
7048 | if (!nfsd_netns_ready(nn)) |
7049 | return count; | |
184c1847 | 7050 | |
98d5c7c5 JL |
7051 | spin_lock(&nn->client_lock); |
7052 | list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { | |
7053 | count += nfsd_find_all_delegations(clp, max - count, &reaplist); | |
7054 | if (max != 0 && ++count >= max) | |
7055 | break; | |
7056 | } | |
7057 | spin_unlock(&nn->client_lock); | |
7058 | nfsd_recall_delegations(&reaplist); | |
184c1847 BS |
7059 | return count; |
7060 | } | |
65178db4 BS |
7061 | #endif /* CONFIG_NFSD_FAULT_INJECTION */ |
7062 | ||
c2f1a551 MS |
7063 | /* |
7064 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
7065 | * client may quite reasonably hang on to a delegation as long as it has | |
7066 | * the inode cached. This becomes an obvious problem the first time a | |
7067 | * client's inode cache approaches the size of the server's total memory. | |
7068 | * | |
7069 | * For now we avoid this problem by imposing a hard limit on the number | |
7070 | * of delegations, which varies according to the server's memory size. | |
7071 | */ | |
7072 | static void | |
7073 | set_max_delegations(void) | |
7074 | { | |
7075 | /* | |
7076 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
7077 | * estimates suggest that in the worst case (where every delegation | |
7078 | * is for a different inode), a delegation could take about 1.5K, | |
7079 | * giving a worst case usage of about 6% of memory. | |
7080 | */ | |
7081 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
7082 | } | |
7083 | ||
d85ed443 | 7084 | static int nfs4_state_create_net(struct net *net) |
8daae4dc SK |
7085 | { |
7086 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
7087 | int i; | |
7088 | ||
7089 | nn->conf_id_hashtbl = kmalloc(sizeof(struct list_head) * | |
7090 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
7091 | if (!nn->conf_id_hashtbl) | |
382a62e7 | 7092 | goto err; |
0a7ec377 SK |
7093 | nn->unconf_id_hashtbl = kmalloc(sizeof(struct list_head) * |
7094 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
7095 | if (!nn->unconf_id_hashtbl) | |
7096 | goto err_unconf_id; | |
1872de0e SK |
7097 | nn->sessionid_hashtbl = kmalloc(sizeof(struct list_head) * |
7098 | SESSION_HASH_SIZE, GFP_KERNEL); | |
7099 | if (!nn->sessionid_hashtbl) | |
7100 | goto err_sessionid; | |
8daae4dc | 7101 | |
382a62e7 | 7102 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
8daae4dc | 7103 | INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]); |
0a7ec377 | 7104 | INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]); |
382a62e7 | 7105 | } |
1872de0e SK |
7106 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
7107 | INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]); | |
382a62e7 | 7108 | nn->conf_name_tree = RB_ROOT; |
a99454aa | 7109 | nn->unconf_name_tree = RB_ROOT; |
02cfbaa6 VA |
7110 | nn->boot_time = get_seconds(); |
7111 | nn->grace_ended = false; | |
7112 | nn->nfsd4_manager.block_opens = true; | |
7113 | INIT_LIST_HEAD(&nn->nfsd4_manager.list); | |
5ed58bb2 | 7114 | INIT_LIST_HEAD(&nn->client_lru); |
73758fed | 7115 | INIT_LIST_HEAD(&nn->close_lru); |
e8c69d17 | 7116 | INIT_LIST_HEAD(&nn->del_recall_lru); |
c9a49628 | 7117 | spin_lock_init(&nn->client_lock); |
8daae4dc | 7118 | |
0cc11a61 JL |
7119 | spin_lock_init(&nn->blocked_locks_lock); |
7120 | INIT_LIST_HEAD(&nn->blocked_locks_lru); | |
7121 | ||
09121281 | 7122 | INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main); |
d85ed443 | 7123 | get_net(net); |
09121281 | 7124 | |
8daae4dc | 7125 | return 0; |
382a62e7 | 7126 | |
1872de0e | 7127 | err_sessionid: |
9b531137 | 7128 | kfree(nn->unconf_id_hashtbl); |
0a7ec377 SK |
7129 | err_unconf_id: |
7130 | kfree(nn->conf_id_hashtbl); | |
382a62e7 SK |
7131 | err: |
7132 | return -ENOMEM; | |
8daae4dc SK |
7133 | } |
7134 | ||
7135 | static void | |
4dce0ac9 | 7136 | nfs4_state_destroy_net(struct net *net) |
8daae4dc SK |
7137 | { |
7138 | int i; | |
7139 | struct nfs4_client *clp = NULL; | |
7140 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
7141 | ||
7142 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { | |
7143 | while (!list_empty(&nn->conf_id_hashtbl[i])) { | |
7144 | clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
7145 | destroy_client(clp); | |
7146 | } | |
7147 | } | |
a99454aa | 7148 | |
797bfd05 JL |
7149 | WARN_ON(!list_empty(&nn->blocked_locks_lru)); |
7150 | ||
2b905635 KM |
7151 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
7152 | while (!list_empty(&nn->unconf_id_hashtbl[i])) { | |
7153 | clp = list_entry(nn->unconf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
7154 | destroy_client(clp); | |
7155 | } | |
a99454aa SK |
7156 | } |
7157 | ||
1872de0e | 7158 | kfree(nn->sessionid_hashtbl); |
0a7ec377 | 7159 | kfree(nn->unconf_id_hashtbl); |
8daae4dc | 7160 | kfree(nn->conf_id_hashtbl); |
4dce0ac9 | 7161 | put_net(net); |
8daae4dc SK |
7162 | } |
7163 | ||
f252bc68 | 7164 | int |
d85ed443 | 7165 | nfs4_state_start_net(struct net *net) |
ac4d8ff2 | 7166 | { |
5e1533c7 | 7167 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b5a1a81e BF |
7168 | int ret; |
7169 | ||
d85ed443 | 7170 | ret = nfs4_state_create_net(net); |
8daae4dc SK |
7171 | if (ret) |
7172 | return ret; | |
d4318acd JL |
7173 | locks_start_grace(net, &nn->nfsd4_manager); |
7174 | nfsd4_client_tracking_init(net); | |
d85ed443 | 7175 | printk(KERN_INFO "NFSD: starting %ld-second grace period (net %p)\n", |
5284b44e SK |
7176 | nn->nfsd4_grace, net); |
7177 | queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ); | |
d85ed443 SK |
7178 | return 0; |
7179 | } | |
7180 | ||
7181 | /* initialization to perform when the nfsd service is started: */ | |
7182 | ||
7183 | int | |
7184 | nfs4_state_start(void) | |
7185 | { | |
7186 | int ret; | |
7187 | ||
b5a1a81e | 7188 | ret = set_callback_cred(); |
d85ed443 | 7189 | if (ret) |
f7d1ddbe KM |
7190 | return ret; |
7191 | ||
51a54568 | 7192 | laundry_wq = alloc_workqueue("%s", WQ_UNBOUND, 0, "nfsd4"); |
a6d6b781 JL |
7193 | if (laundry_wq == NULL) { |
7194 | ret = -ENOMEM; | |
f7d1ddbe | 7195 | goto out_cleanup_cred; |
a6d6b781 | 7196 | } |
b5a1a81e BF |
7197 | ret = nfsd4_create_callback_queue(); |
7198 | if (ret) | |
7199 | goto out_free_laundry; | |
09121281 | 7200 | |
c2f1a551 | 7201 | set_max_delegations(); |
b5a1a81e | 7202 | return 0; |
d85ed443 | 7203 | |
b5a1a81e BF |
7204 | out_free_laundry: |
7205 | destroy_workqueue(laundry_wq); | |
f7d1ddbe KM |
7206 | out_cleanup_cred: |
7207 | cleanup_callback_cred(); | |
b5a1a81e | 7208 | return ret; |
1da177e4 LT |
7209 | } |
7210 | ||
f252bc68 | 7211 | void |
4dce0ac9 | 7212 | nfs4_state_shutdown_net(struct net *net) |
1da177e4 | 7213 | { |
1da177e4 | 7214 | struct nfs4_delegation *dp = NULL; |
1da177e4 | 7215 | struct list_head *pos, *next, reaplist; |
4dce0ac9 | 7216 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
1da177e4 | 7217 | |
4dce0ac9 SK |
7218 | cancel_delayed_work_sync(&nn->laundromat_work); |
7219 | locks_end_grace(&nn->nfsd4_manager); | |
ac55fdc4 | 7220 | |
1da177e4 | 7221 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 7222 | spin_lock(&state_lock); |
e8c69d17 | 7223 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 | 7224 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
3fcbbd24 | 7225 | WARN_ON(!unhash_delegation_locked(dp)); |
42690676 | 7226 | list_add(&dp->dl_recall_lru, &reaplist); |
1da177e4 | 7227 | } |
cdc97505 | 7228 | spin_unlock(&state_lock); |
1da177e4 LT |
7229 | list_for_each_safe(pos, next, &reaplist) { |
7230 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
42690676 | 7231 | list_del_init(&dp->dl_recall_lru); |
8287f009 | 7232 | put_clnt_odstate(dp->dl_clnt_odstate); |
afbda402 | 7233 | nfs4_put_deleg_lease(dp->dl_stid.sc_file); |
6011695d | 7234 | nfs4_put_stid(&dp->dl_stid); |
1da177e4 LT |
7235 | } |
7236 | ||
3320fef1 | 7237 | nfsd4_client_tracking_exit(net); |
4dce0ac9 | 7238 | nfs4_state_destroy_net(net); |
1da177e4 LT |
7239 | } |
7240 | ||
7241 | void | |
7242 | nfs4_state_shutdown(void) | |
7243 | { | |
5e8d5c29 | 7244 | destroy_workqueue(laundry_wq); |
c3935e30 | 7245 | nfsd4_destroy_callback_queue(); |
f7d1ddbe | 7246 | cleanup_callback_cred(); |
1da177e4 | 7247 | } |
8b70484c TM |
7248 | |
7249 | static void | |
7250 | get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
7251 | { | |
37c593c5 TM |
7252 | if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) |
7253 | memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); | |
8b70484c TM |
7254 | } |
7255 | ||
7256 | static void | |
7257 | put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
7258 | { | |
37c593c5 TM |
7259 | if (cstate->minorversion) { |
7260 | memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); | |
7261 | SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
7262 | } | |
7263 | } | |
7264 | ||
7265 | void | |
7266 | clear_current_stateid(struct nfsd4_compound_state *cstate) | |
7267 | { | |
7268 | CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
8b70484c TM |
7269 | } |
7270 | ||
62cd4a59 TM |
7271 | /* |
7272 | * functions to set current state id | |
7273 | */ | |
9428fe1a | 7274 | void |
b60e9859 CH |
7275 | nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, |
7276 | union nfsd4_op_u *u) | |
9428fe1a | 7277 | { |
b60e9859 | 7278 | put_stateid(cstate, &u->open_downgrade.od_stateid); |
9428fe1a TM |
7279 | } |
7280 | ||
8b70484c | 7281 | void |
b60e9859 CH |
7282 | nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, |
7283 | union nfsd4_op_u *u) | |
8b70484c | 7284 | { |
b60e9859 | 7285 | put_stateid(cstate, &u->open.op_stateid); |
8b70484c TM |
7286 | } |
7287 | ||
62cd4a59 | 7288 | void |
b60e9859 CH |
7289 | nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, |
7290 | union nfsd4_op_u *u) | |
62cd4a59 | 7291 | { |
b60e9859 | 7292 | put_stateid(cstate, &u->close.cl_stateid); |
62cd4a59 TM |
7293 | } |
7294 | ||
7295 | void | |
b60e9859 CH |
7296 | nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, |
7297 | union nfsd4_op_u *u) | |
62cd4a59 | 7298 | { |
b60e9859 | 7299 | put_stateid(cstate, &u->lock.lk_resp_stateid); |
62cd4a59 TM |
7300 | } |
7301 | ||
7302 | /* | |
7303 | * functions to consume current state id | |
7304 | */ | |
1e97b519 | 7305 | |
9428fe1a | 7306 | void |
57832e7b CH |
7307 | nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, |
7308 | union nfsd4_op_u *u) | |
9428fe1a | 7309 | { |
57832e7b | 7310 | get_stateid(cstate, &u->open_downgrade.od_stateid); |
9428fe1a TM |
7311 | } |
7312 | ||
7313 | void | |
57832e7b CH |
7314 | nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, |
7315 | union nfsd4_op_u *u) | |
9428fe1a | 7316 | { |
57832e7b | 7317 | get_stateid(cstate, &u->delegreturn.dr_stateid); |
9428fe1a TM |
7318 | } |
7319 | ||
1e97b519 | 7320 | void |
57832e7b CH |
7321 | nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, |
7322 | union nfsd4_op_u *u) | |
1e97b519 | 7323 | { |
57832e7b | 7324 | get_stateid(cstate, &u->free_stateid.fr_stateid); |
1e97b519 TM |
7325 | } |
7326 | ||
7327 | void | |
57832e7b CH |
7328 | nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, |
7329 | union nfsd4_op_u *u) | |
1e97b519 | 7330 | { |
57832e7b | 7331 | get_stateid(cstate, &u->setattr.sa_stateid); |
1e97b519 TM |
7332 | } |
7333 | ||
8b70484c | 7334 | void |
57832e7b CH |
7335 | nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, |
7336 | union nfsd4_op_u *u) | |
8b70484c | 7337 | { |
57832e7b | 7338 | get_stateid(cstate, &u->close.cl_stateid); |
8b70484c TM |
7339 | } |
7340 | ||
7341 | void | |
57832e7b CH |
7342 | nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, |
7343 | union nfsd4_op_u *u) | |
8b70484c | 7344 | { |
57832e7b | 7345 | get_stateid(cstate, &u->locku.lu_stateid); |
8b70484c | 7346 | } |
30813e27 TM |
7347 | |
7348 | void | |
57832e7b CH |
7349 | nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, |
7350 | union nfsd4_op_u *u) | |
30813e27 | 7351 | { |
57832e7b | 7352 | get_stateid(cstate, &u->read.rd_stateid); |
30813e27 TM |
7353 | } |
7354 | ||
7355 | void | |
57832e7b CH |
7356 | nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, |
7357 | union nfsd4_op_u *u) | |
30813e27 | 7358 | { |
57832e7b | 7359 | get_stateid(cstate, &u->write.wr_stateid); |
30813e27 | 7360 | } |