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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 | }; | |
f32f3c2d | 66 | |
ec6b5d7b | 67 | static u64 current_sessionid = 1; |
fd39ca9a | 68 | |
f32f3c2d BF |
69 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t))) |
70 | #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t))) | |
19ff0f28 | 71 | #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t))) |
1da177e4 | 72 | |
1da177e4 | 73 | /* forward declarations */ |
f9c00c3a | 74 | static bool check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner); |
6011695d | 75 | static void nfs4_free_ol_stateid(struct nfs4_stid *stid); |
1da177e4 | 76 | |
8b671b80 BF |
77 | /* Locking: */ |
78 | ||
8b671b80 BF |
79 | /* |
80 | * Currently used for the del_recall_lru and file hash table. In an | |
81 | * effort to decrease the scope of the client_mutex, this spinlock may | |
82 | * eventually cover more: | |
83 | */ | |
cdc97505 | 84 | static DEFINE_SPINLOCK(state_lock); |
8b671b80 | 85 | |
b401be22 JL |
86 | /* |
87 | * A waitqueue for all in-progress 4.0 CLOSE operations that are waiting for | |
88 | * the refcount on the open stateid to drop. | |
89 | */ | |
90 | static DECLARE_WAIT_QUEUE_HEAD(close_wq); | |
91 | ||
abf1135b CH |
92 | static struct kmem_cache *openowner_slab; |
93 | static struct kmem_cache *lockowner_slab; | |
94 | static struct kmem_cache *file_slab; | |
95 | static struct kmem_cache *stateid_slab; | |
96 | static struct kmem_cache *deleg_slab; | |
8287f009 | 97 | static struct kmem_cache *odstate_slab; |
e60d4398 | 98 | |
66b2b9b2 | 99 | static void free_session(struct nfsd4_session *); |
508dc6e1 | 100 | |
c4cb8974 | 101 | static const struct nfsd4_callback_ops nfsd4_cb_recall_ops; |
76d348fa | 102 | static const struct nfsd4_callback_ops nfsd4_cb_notify_lock_ops; |
0162ac2b | 103 | |
f0f51f5c | 104 | static bool is_session_dead(struct nfsd4_session *ses) |
66b2b9b2 | 105 | { |
f0f51f5c | 106 | return ses->se_flags & NFS4_SESSION_DEAD; |
66b2b9b2 BF |
107 | } |
108 | ||
f0f51f5c | 109 | static __be32 mark_session_dead_locked(struct nfsd4_session *ses, int ref_held_by_me) |
508dc6e1 | 110 | { |
f0f51f5c | 111 | if (atomic_read(&ses->se_ref) > ref_held_by_me) |
66b2b9b2 BF |
112 | return nfserr_jukebox; |
113 | ses->se_flags |= NFS4_SESSION_DEAD; | |
114 | return nfs_ok; | |
508dc6e1 BH |
115 | } |
116 | ||
221a6876 BF |
117 | static bool is_client_expired(struct nfs4_client *clp) |
118 | { | |
119 | return clp->cl_time == 0; | |
120 | } | |
121 | ||
221a6876 BF |
122 | static __be32 get_client_locked(struct nfs4_client *clp) |
123 | { | |
0a880a28 TM |
124 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
125 | ||
126 | lockdep_assert_held(&nn->client_lock); | |
127 | ||
221a6876 BF |
128 | if (is_client_expired(clp)) |
129 | return nfserr_expired; | |
130 | atomic_inc(&clp->cl_refcount); | |
131 | return nfs_ok; | |
132 | } | |
133 | ||
134 | /* must be called under the client_lock */ | |
135 | static inline void | |
136 | renew_client_locked(struct nfs4_client *clp) | |
137 | { | |
138 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
139 | ||
140 | if (is_client_expired(clp)) { | |
141 | WARN_ON(1); | |
142 | printk("%s: client (clientid %08x/%08x) already expired\n", | |
143 | __func__, | |
144 | clp->cl_clientid.cl_boot, | |
145 | clp->cl_clientid.cl_id); | |
146 | return; | |
147 | } | |
148 | ||
149 | dprintk("renewing client (clientid %08x/%08x)\n", | |
150 | clp->cl_clientid.cl_boot, | |
151 | clp->cl_clientid.cl_id); | |
152 | list_move_tail(&clp->cl_lru, &nn->client_lru); | |
153 | clp->cl_time = get_seconds(); | |
154 | } | |
155 | ||
ba138435 | 156 | static void put_client_renew_locked(struct nfs4_client *clp) |
221a6876 | 157 | { |
0a880a28 TM |
158 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
159 | ||
160 | lockdep_assert_held(&nn->client_lock); | |
161 | ||
221a6876 BF |
162 | if (!atomic_dec_and_test(&clp->cl_refcount)) |
163 | return; | |
164 | if (!is_client_expired(clp)) | |
165 | renew_client_locked(clp); | |
166 | } | |
167 | ||
4b24ca7d JL |
168 | static void put_client_renew(struct nfs4_client *clp) |
169 | { | |
170 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
171 | ||
d6c249b4 JL |
172 | if (!atomic_dec_and_lock(&clp->cl_refcount, &nn->client_lock)) |
173 | return; | |
174 | if (!is_client_expired(clp)) | |
175 | renew_client_locked(clp); | |
4b24ca7d JL |
176 | spin_unlock(&nn->client_lock); |
177 | } | |
178 | ||
d4e19e70 TM |
179 | static __be32 nfsd4_get_session_locked(struct nfsd4_session *ses) |
180 | { | |
181 | __be32 status; | |
182 | ||
183 | if (is_session_dead(ses)) | |
184 | return nfserr_badsession; | |
185 | status = get_client_locked(ses->se_client); | |
186 | if (status) | |
187 | return status; | |
188 | atomic_inc(&ses->se_ref); | |
189 | return nfs_ok; | |
190 | } | |
191 | ||
192 | static void nfsd4_put_session_locked(struct nfsd4_session *ses) | |
193 | { | |
194 | struct nfs4_client *clp = ses->se_client; | |
0a880a28 TM |
195 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
196 | ||
197 | lockdep_assert_held(&nn->client_lock); | |
d4e19e70 TM |
198 | |
199 | if (atomic_dec_and_test(&ses->se_ref) && is_session_dead(ses)) | |
200 | free_session(ses); | |
201 | put_client_renew_locked(clp); | |
202 | } | |
203 | ||
204 | static void nfsd4_put_session(struct nfsd4_session *ses) | |
205 | { | |
206 | struct nfs4_client *clp = ses->se_client; | |
207 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
208 | ||
209 | spin_lock(&nn->client_lock); | |
210 | nfsd4_put_session_locked(ses); | |
211 | spin_unlock(&nn->client_lock); | |
212 | } | |
213 | ||
76d348fa JL |
214 | static struct nfsd4_blocked_lock * |
215 | find_blocked_lock(struct nfs4_lockowner *lo, struct knfsd_fh *fh, | |
216 | struct nfsd_net *nn) | |
217 | { | |
218 | struct nfsd4_blocked_lock *cur, *found = NULL; | |
219 | ||
0cc11a61 | 220 | spin_lock(&nn->blocked_locks_lock); |
76d348fa JL |
221 | list_for_each_entry(cur, &lo->lo_blocked, nbl_list) { |
222 | if (fh_match(fh, &cur->nbl_fh)) { | |
223 | list_del_init(&cur->nbl_list); | |
7919d0a2 | 224 | list_del_init(&cur->nbl_lru); |
76d348fa JL |
225 | found = cur; |
226 | break; | |
227 | } | |
228 | } | |
0cc11a61 | 229 | spin_unlock(&nn->blocked_locks_lock); |
76d348fa JL |
230 | if (found) |
231 | posix_unblock_lock(&found->nbl_lock); | |
232 | return found; | |
233 | } | |
234 | ||
235 | static struct nfsd4_blocked_lock * | |
236 | find_or_allocate_block(struct nfs4_lockowner *lo, struct knfsd_fh *fh, | |
237 | struct nfsd_net *nn) | |
238 | { | |
239 | struct nfsd4_blocked_lock *nbl; | |
240 | ||
241 | nbl = find_blocked_lock(lo, fh, nn); | |
242 | if (!nbl) { | |
243 | nbl= kmalloc(sizeof(*nbl), GFP_KERNEL); | |
244 | if (nbl) { | |
245 | fh_copy_shallow(&nbl->nbl_fh, fh); | |
246 | locks_init_lock(&nbl->nbl_lock); | |
247 | nfsd4_init_cb(&nbl->nbl_cb, lo->lo_owner.so_client, | |
248 | &nfsd4_cb_notify_lock_ops, | |
249 | NFSPROC4_CLNT_CB_NOTIFY_LOCK); | |
250 | } | |
251 | } | |
252 | return nbl; | |
253 | } | |
254 | ||
255 | static void | |
256 | free_blocked_lock(struct nfsd4_blocked_lock *nbl) | |
257 | { | |
258 | locks_release_private(&nbl->nbl_lock); | |
259 | kfree(nbl); | |
260 | } | |
261 | ||
262 | static int | |
263 | nfsd4_cb_notify_lock_done(struct nfsd4_callback *cb, struct rpc_task *task) | |
264 | { | |
265 | /* | |
266 | * Since this is just an optimization, we don't try very hard if it | |
267 | * turns out not to succeed. We'll requeue it on NFS4ERR_DELAY, and | |
268 | * just quit trying on anything else. | |
269 | */ | |
270 | switch (task->tk_status) { | |
271 | case -NFS4ERR_DELAY: | |
272 | rpc_delay(task, 1 * HZ); | |
273 | return 0; | |
274 | default: | |
275 | return 1; | |
276 | } | |
277 | } | |
278 | ||
279 | static void | |
280 | nfsd4_cb_notify_lock_release(struct nfsd4_callback *cb) | |
281 | { | |
282 | struct nfsd4_blocked_lock *nbl = container_of(cb, | |
283 | struct nfsd4_blocked_lock, nbl_cb); | |
284 | ||
285 | free_blocked_lock(nbl); | |
286 | } | |
287 | ||
288 | static const struct nfsd4_callback_ops nfsd4_cb_notify_lock_ops = { | |
289 | .done = nfsd4_cb_notify_lock_done, | |
290 | .release = nfsd4_cb_notify_lock_release, | |
291 | }; | |
292 | ||
b5971afa KM |
293 | static inline struct nfs4_stateowner * |
294 | nfs4_get_stateowner(struct nfs4_stateowner *sop) | |
295 | { | |
296 | atomic_inc(&sop->so_count); | |
297 | return sop; | |
298 | } | |
299 | ||
7ffb5880 | 300 | static int |
d4f0489f | 301 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner) |
7ffb5880 TM |
302 | { |
303 | return (sop->so_owner.len == owner->len) && | |
d4f0489f | 304 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len); |
7ffb5880 TM |
305 | } |
306 | ||
307 | static struct nfs4_openowner * | |
308 | find_openstateowner_str_locked(unsigned int hashval, struct nfsd4_open *open, | |
d4f0489f | 309 | struct nfs4_client *clp) |
7ffb5880 TM |
310 | { |
311 | struct nfs4_stateowner *so; | |
7ffb5880 | 312 | |
d4f0489f | 313 | lockdep_assert_held(&clp->cl_lock); |
7ffb5880 | 314 | |
d4f0489f TM |
315 | list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[hashval], |
316 | so_strhash) { | |
7ffb5880 TM |
317 | if (!so->so_is_open_owner) |
318 | continue; | |
b5971afa KM |
319 | if (same_owner_str(so, &open->op_owner)) |
320 | return openowner(nfs4_get_stateowner(so)); | |
7ffb5880 TM |
321 | } |
322 | return NULL; | |
323 | } | |
324 | ||
325 | static struct nfs4_openowner * | |
326 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, | |
d4f0489f | 327 | struct nfs4_client *clp) |
7ffb5880 TM |
328 | { |
329 | struct nfs4_openowner *oo; | |
330 | ||
d4f0489f TM |
331 | spin_lock(&clp->cl_lock); |
332 | oo = find_openstateowner_str_locked(hashval, open, clp); | |
333 | spin_unlock(&clp->cl_lock); | |
7ffb5880 TM |
334 | return oo; |
335 | } | |
336 | ||
1da177e4 LT |
337 | static inline u32 |
338 | opaque_hashval(const void *ptr, int nbytes) | |
339 | { | |
340 | unsigned char *cptr = (unsigned char *) ptr; | |
341 | ||
342 | u32 x = 0; | |
343 | while (nbytes--) { | |
344 | x *= 37; | |
345 | x += *cptr++; | |
346 | } | |
347 | return x; | |
348 | } | |
349 | ||
5b095e99 | 350 | static void nfsd4_free_file_rcu(struct rcu_head *rcu) |
32513b40 | 351 | { |
5b095e99 JL |
352 | struct nfs4_file *fp = container_of(rcu, struct nfs4_file, fi_rcu); |
353 | ||
354 | kmem_cache_free(file_slab, fp); | |
32513b40 BF |
355 | } |
356 | ||
e6ba76e1 | 357 | void |
13cd2184 N |
358 | put_nfs4_file(struct nfs4_file *fi) |
359 | { | |
02e1215f JL |
360 | might_lock(&state_lock); |
361 | ||
cdc97505 | 362 | if (atomic_dec_and_lock(&fi->fi_ref, &state_lock)) { |
5b095e99 | 363 | hlist_del_rcu(&fi->fi_hash); |
cdc97505 | 364 | spin_unlock(&state_lock); |
8287f009 | 365 | WARN_ON_ONCE(!list_empty(&fi->fi_clnt_odstate)); |
5b095e99 JL |
366 | WARN_ON_ONCE(!list_empty(&fi->fi_delegations)); |
367 | call_rcu(&fi->fi_rcu, nfsd4_free_file_rcu); | |
8b671b80 | 368 | } |
13cd2184 N |
369 | } |
370 | ||
de18643d TM |
371 | static struct file * |
372 | __nfs4_get_fd(struct nfs4_file *f, int oflag) | |
373 | { | |
374 | if (f->fi_fds[oflag]) | |
375 | return get_file(f->fi_fds[oflag]); | |
376 | return NULL; | |
377 | } | |
378 | ||
379 | static struct file * | |
380 | find_writeable_file_locked(struct nfs4_file *f) | |
381 | { | |
382 | struct file *ret; | |
383 | ||
384 | lockdep_assert_held(&f->fi_lock); | |
385 | ||
386 | ret = __nfs4_get_fd(f, O_WRONLY); | |
387 | if (!ret) | |
388 | ret = __nfs4_get_fd(f, O_RDWR); | |
389 | return ret; | |
390 | } | |
391 | ||
392 | static struct file * | |
393 | find_writeable_file(struct nfs4_file *f) | |
394 | { | |
395 | struct file *ret; | |
396 | ||
397 | spin_lock(&f->fi_lock); | |
398 | ret = find_writeable_file_locked(f); | |
399 | spin_unlock(&f->fi_lock); | |
400 | ||
401 | return ret; | |
402 | } | |
403 | ||
404 | static struct file *find_readable_file_locked(struct nfs4_file *f) | |
405 | { | |
406 | struct file *ret; | |
407 | ||
408 | lockdep_assert_held(&f->fi_lock); | |
409 | ||
410 | ret = __nfs4_get_fd(f, O_RDONLY); | |
411 | if (!ret) | |
412 | ret = __nfs4_get_fd(f, O_RDWR); | |
413 | return ret; | |
414 | } | |
415 | ||
416 | static struct file * | |
417 | find_readable_file(struct nfs4_file *f) | |
418 | { | |
419 | struct file *ret; | |
420 | ||
421 | spin_lock(&f->fi_lock); | |
422 | ret = find_readable_file_locked(f); | |
423 | spin_unlock(&f->fi_lock); | |
424 | ||
425 | return ret; | |
426 | } | |
427 | ||
4d227fca | 428 | struct file * |
de18643d TM |
429 | find_any_file(struct nfs4_file *f) |
430 | { | |
431 | struct file *ret; | |
432 | ||
433 | spin_lock(&f->fi_lock); | |
434 | ret = __nfs4_get_fd(f, O_RDWR); | |
435 | if (!ret) { | |
436 | ret = __nfs4_get_fd(f, O_WRONLY); | |
437 | if (!ret) | |
438 | ret = __nfs4_get_fd(f, O_RDONLY); | |
439 | } | |
440 | spin_unlock(&f->fi_lock); | |
441 | return ret; | |
442 | } | |
443 | ||
02a3508d | 444 | static atomic_long_t num_delegations; |
697ce9be | 445 | unsigned long max_delegations; |
ef0f3390 N |
446 | |
447 | /* | |
448 | * Open owner state (share locks) | |
449 | */ | |
450 | ||
16bfdaaf BF |
451 | /* hash tables for lock and open owners */ |
452 | #define OWNER_HASH_BITS 8 | |
453 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
454 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
ef0f3390 | 455 | |
d4f0489f | 456 | static unsigned int ownerstr_hashval(struct xdr_netobj *ownername) |
ddc04c41 BF |
457 | { |
458 | unsigned int ret; | |
459 | ||
460 | ret = opaque_hashval(ownername->data, ownername->len); | |
16bfdaaf | 461 | return ret & OWNER_HASH_MASK; |
ddc04c41 | 462 | } |
ef0f3390 | 463 | |
ef0f3390 N |
464 | /* hash table for nfs4_file */ |
465 | #define FILE_HASH_BITS 8 | |
466 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
35079582 | 467 | |
ca943217 | 468 | static unsigned int nfsd_fh_hashval(struct knfsd_fh *fh) |
ddc04c41 | 469 | { |
ca943217 TM |
470 | return jhash2(fh->fh_base.fh_pad, XDR_QUADLEN(fh->fh_size), 0); |
471 | } | |
472 | ||
473 | static unsigned int file_hashval(struct knfsd_fh *fh) | |
474 | { | |
475 | return nfsd_fh_hashval(fh) & (FILE_HASH_SIZE - 1); | |
476 | } | |
477 | ||
89876f8c | 478 | static struct hlist_head file_hashtbl[FILE_HASH_SIZE]; |
ef0f3390 | 479 | |
12659651 JL |
480 | static void |
481 | __nfs4_file_get_access(struct nfs4_file *fp, u32 access) | |
3477565e | 482 | { |
7214e860 JL |
483 | lockdep_assert_held(&fp->fi_lock); |
484 | ||
12659651 JL |
485 | if (access & NFS4_SHARE_ACCESS_WRITE) |
486 | atomic_inc(&fp->fi_access[O_WRONLY]); | |
487 | if (access & NFS4_SHARE_ACCESS_READ) | |
488 | atomic_inc(&fp->fi_access[O_RDONLY]); | |
3477565e BF |
489 | } |
490 | ||
12659651 JL |
491 | static __be32 |
492 | nfs4_file_get_access(struct nfs4_file *fp, u32 access) | |
998db52c | 493 | { |
7214e860 JL |
494 | lockdep_assert_held(&fp->fi_lock); |
495 | ||
12659651 JL |
496 | /* Does this access mode make sense? */ |
497 | if (access & ~NFS4_SHARE_ACCESS_BOTH) | |
498 | return nfserr_inval; | |
499 | ||
baeb4ff0 JL |
500 | /* Does it conflict with a deny mode already set? */ |
501 | if ((access & fp->fi_share_deny) != 0) | |
502 | return nfserr_share_denied; | |
503 | ||
12659651 JL |
504 | __nfs4_file_get_access(fp, access); |
505 | return nfs_ok; | |
998db52c BF |
506 | } |
507 | ||
baeb4ff0 JL |
508 | static __be32 nfs4_file_check_deny(struct nfs4_file *fp, u32 deny) |
509 | { | |
510 | /* Common case is that there is no deny mode. */ | |
511 | if (deny) { | |
512 | /* Does this deny mode make sense? */ | |
513 | if (deny & ~NFS4_SHARE_DENY_BOTH) | |
514 | return nfserr_inval; | |
515 | ||
516 | if ((deny & NFS4_SHARE_DENY_READ) && | |
517 | atomic_read(&fp->fi_access[O_RDONLY])) | |
518 | return nfserr_share_denied; | |
519 | ||
520 | if ((deny & NFS4_SHARE_DENY_WRITE) && | |
521 | atomic_read(&fp->fi_access[O_WRONLY])) | |
522 | return nfserr_share_denied; | |
523 | } | |
524 | return nfs_ok; | |
525 | } | |
526 | ||
998db52c | 527 | static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
f9d7562f | 528 | { |
de18643d TM |
529 | might_lock(&fp->fi_lock); |
530 | ||
531 | if (atomic_dec_and_lock(&fp->fi_access[oflag], &fp->fi_lock)) { | |
532 | struct file *f1 = NULL; | |
533 | struct file *f2 = NULL; | |
534 | ||
6d338b51 | 535 | swap(f1, fp->fi_fds[oflag]); |
0c7c3e67 | 536 | if (atomic_read(&fp->fi_access[1 - oflag]) == 0) |
6d338b51 | 537 | swap(f2, fp->fi_fds[O_RDWR]); |
de18643d TM |
538 | spin_unlock(&fp->fi_lock); |
539 | if (f1) | |
540 | fput(f1); | |
541 | if (f2) | |
542 | fput(f2); | |
f9d7562f BF |
543 | } |
544 | } | |
545 | ||
12659651 | 546 | static void nfs4_file_put_access(struct nfs4_file *fp, u32 access) |
998db52c | 547 | { |
12659651 JL |
548 | WARN_ON_ONCE(access & ~NFS4_SHARE_ACCESS_BOTH); |
549 | ||
550 | if (access & NFS4_SHARE_ACCESS_WRITE) | |
998db52c | 551 | __nfs4_file_put_access(fp, O_WRONLY); |
12659651 JL |
552 | if (access & NFS4_SHARE_ACCESS_READ) |
553 | __nfs4_file_put_access(fp, O_RDONLY); | |
998db52c BF |
554 | } |
555 | ||
8287f009 SB |
556 | /* |
557 | * Allocate a new open/delegation state counter. This is needed for | |
558 | * pNFS for proper return on close semantics. | |
559 | * | |
560 | * Note that we only allocate it for pNFS-enabled exports, otherwise | |
561 | * all pointers to struct nfs4_clnt_odstate are always NULL. | |
562 | */ | |
563 | static struct nfs4_clnt_odstate * | |
564 | alloc_clnt_odstate(struct nfs4_client *clp) | |
565 | { | |
566 | struct nfs4_clnt_odstate *co; | |
567 | ||
568 | co = kmem_cache_zalloc(odstate_slab, GFP_KERNEL); | |
569 | if (co) { | |
570 | co->co_client = clp; | |
571 | atomic_set(&co->co_odcount, 1); | |
572 | } | |
573 | return co; | |
574 | } | |
575 | ||
576 | static void | |
577 | hash_clnt_odstate_locked(struct nfs4_clnt_odstate *co) | |
578 | { | |
579 | struct nfs4_file *fp = co->co_file; | |
580 | ||
581 | lockdep_assert_held(&fp->fi_lock); | |
582 | list_add(&co->co_perfile, &fp->fi_clnt_odstate); | |
583 | } | |
584 | ||
585 | static inline void | |
586 | get_clnt_odstate(struct nfs4_clnt_odstate *co) | |
587 | { | |
588 | if (co) | |
589 | atomic_inc(&co->co_odcount); | |
590 | } | |
591 | ||
592 | static void | |
593 | put_clnt_odstate(struct nfs4_clnt_odstate *co) | |
594 | { | |
595 | struct nfs4_file *fp; | |
596 | ||
597 | if (!co) | |
598 | return; | |
599 | ||
600 | fp = co->co_file; | |
601 | if (atomic_dec_and_lock(&co->co_odcount, &fp->fi_lock)) { | |
602 | list_del(&co->co_perfile); | |
603 | spin_unlock(&fp->fi_lock); | |
604 | ||
605 | nfsd4_return_all_file_layouts(co->co_client, fp); | |
606 | kmem_cache_free(odstate_slab, co); | |
607 | } | |
608 | } | |
609 | ||
610 | static struct nfs4_clnt_odstate * | |
611 | find_or_hash_clnt_odstate(struct nfs4_file *fp, struct nfs4_clnt_odstate *new) | |
612 | { | |
613 | struct nfs4_clnt_odstate *co; | |
614 | struct nfs4_client *cl; | |
615 | ||
616 | if (!new) | |
617 | return NULL; | |
618 | ||
619 | cl = new->co_client; | |
620 | ||
621 | spin_lock(&fp->fi_lock); | |
622 | list_for_each_entry(co, &fp->fi_clnt_odstate, co_perfile) { | |
623 | if (co->co_client == cl) { | |
624 | get_clnt_odstate(co); | |
625 | goto out; | |
626 | } | |
627 | } | |
628 | co = new; | |
629 | co->co_file = fp; | |
630 | hash_clnt_odstate_locked(new); | |
631 | out: | |
632 | spin_unlock(&fp->fi_lock); | |
633 | return co; | |
634 | } | |
635 | ||
d19fb70d KM |
636 | struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct kmem_cache *slab, |
637 | void (*sc_free)(struct nfs4_stid *)) | |
2a74aba7 | 638 | { |
3abdb607 | 639 | struct nfs4_stid *stid; |
6136d2b4 | 640 | int new_id; |
2a74aba7 | 641 | |
f8338834 | 642 | stid = kmem_cache_zalloc(slab, GFP_KERNEL); |
3abdb607 BF |
643 | if (!stid) |
644 | return NULL; | |
645 | ||
4770d722 JL |
646 | idr_preload(GFP_KERNEL); |
647 | spin_lock(&cl->cl_lock); | |
648 | new_id = idr_alloc_cyclic(&cl->cl_stateids, stid, 0, 0, GFP_NOWAIT); | |
649 | spin_unlock(&cl->cl_lock); | |
650 | idr_preload_end(); | |
ebd6c707 | 651 | if (new_id < 0) |
3abdb607 | 652 | goto out_free; |
d19fb70d KM |
653 | |
654 | stid->sc_free = sc_free; | |
2a74aba7 | 655 | stid->sc_client = cl; |
3abdb607 BF |
656 | stid->sc_stateid.si_opaque.so_id = new_id; |
657 | stid->sc_stateid.si_opaque.so_clid = cl->cl_clientid; | |
2a74aba7 | 658 | /* Will be incremented before return to client: */ |
72c0b0fb | 659 | atomic_set(&stid->sc_count, 1); |
9767feb2 | 660 | spin_lock_init(&stid->sc_lock); |
996e0938 | 661 | |
996e0938 | 662 | /* |
3abdb607 BF |
663 | * It shouldn't be a problem to reuse an opaque stateid value. |
664 | * I don't think it is for 4.1. But with 4.0 I worry that, for | |
665 | * example, a stray write retransmission could be accepted by | |
666 | * the server when it should have been rejected. Therefore, | |
667 | * adopt a trick from the sctp code to attempt to maximize the | |
668 | * amount of time until an id is reused, by ensuring they always | |
669 | * "increase" (mod INT_MAX): | |
996e0938 | 670 | */ |
3abdb607 BF |
671 | return stid; |
672 | out_free: | |
2c44a234 | 673 | kmem_cache_free(slab, stid); |
3abdb607 | 674 | return NULL; |
2a74aba7 BF |
675 | } |
676 | ||
b49e084d | 677 | static struct nfs4_ol_stateid * nfs4_alloc_open_stateid(struct nfs4_client *clp) |
4cdc951b | 678 | { |
6011695d | 679 | struct nfs4_stid *stid; |
6011695d | 680 | |
d19fb70d | 681 | stid = nfs4_alloc_stid(clp, stateid_slab, nfs4_free_ol_stateid); |
6011695d TM |
682 | if (!stid) |
683 | return NULL; | |
684 | ||
d19fb70d | 685 | return openlockstateid(stid); |
6011695d TM |
686 | } |
687 | ||
688 | static void nfs4_free_deleg(struct nfs4_stid *stid) | |
689 | { | |
6011695d TM |
690 | kmem_cache_free(deleg_slab, stid); |
691 | atomic_long_dec(&num_delegations); | |
4cdc951b BF |
692 | } |
693 | ||
6282cd56 N |
694 | /* |
695 | * When we recall a delegation, we should be careful not to hand it | |
696 | * out again straight away. | |
697 | * To ensure this we keep a pair of bloom filters ('new' and 'old') | |
698 | * in which the filehandles of recalled delegations are "stored". | |
699 | * If a filehandle appear in either filter, a delegation is blocked. | |
700 | * When a delegation is recalled, the filehandle is stored in the "new" | |
701 | * filter. | |
702 | * Every 30 seconds we swap the filters and clear the "new" one, | |
703 | * unless both are empty of course. | |
704 | * | |
705 | * Each filter is 256 bits. We hash the filehandle to 32bit and use the | |
706 | * low 3 bytes as hash-table indices. | |
707 | * | |
f54fe962 | 708 | * 'blocked_delegations_lock', which is always taken in block_delegations(), |
6282cd56 N |
709 | * is used to manage concurrent access. Testing does not need the lock |
710 | * except when swapping the two filters. | |
711 | */ | |
f54fe962 | 712 | static DEFINE_SPINLOCK(blocked_delegations_lock); |
6282cd56 N |
713 | static struct bloom_pair { |
714 | int entries, old_entries; | |
715 | time_t swap_time; | |
716 | int new; /* index into 'set' */ | |
717 | DECLARE_BITMAP(set[2], 256); | |
718 | } blocked_delegations; | |
719 | ||
720 | static int delegation_blocked(struct knfsd_fh *fh) | |
721 | { | |
722 | u32 hash; | |
723 | struct bloom_pair *bd = &blocked_delegations; | |
724 | ||
725 | if (bd->entries == 0) | |
726 | return 0; | |
727 | if (seconds_since_boot() - bd->swap_time > 30) { | |
f54fe962 | 728 | spin_lock(&blocked_delegations_lock); |
6282cd56 N |
729 | if (seconds_since_boot() - bd->swap_time > 30) { |
730 | bd->entries -= bd->old_entries; | |
731 | bd->old_entries = bd->entries; | |
732 | memset(bd->set[bd->new], 0, | |
733 | sizeof(bd->set[0])); | |
734 | bd->new = 1-bd->new; | |
735 | bd->swap_time = seconds_since_boot(); | |
736 | } | |
f54fe962 | 737 | spin_unlock(&blocked_delegations_lock); |
6282cd56 | 738 | } |
87545899 | 739 | hash = jhash(&fh->fh_base, fh->fh_size, 0); |
6282cd56 N |
740 | if (test_bit(hash&255, bd->set[0]) && |
741 | test_bit((hash>>8)&255, bd->set[0]) && | |
742 | test_bit((hash>>16)&255, bd->set[0])) | |
743 | return 1; | |
744 | ||
745 | if (test_bit(hash&255, bd->set[1]) && | |
746 | test_bit((hash>>8)&255, bd->set[1]) && | |
747 | test_bit((hash>>16)&255, bd->set[1])) | |
748 | return 1; | |
749 | ||
750 | return 0; | |
751 | } | |
752 | ||
753 | static void block_delegations(struct knfsd_fh *fh) | |
754 | { | |
755 | u32 hash; | |
756 | struct bloom_pair *bd = &blocked_delegations; | |
757 | ||
87545899 | 758 | hash = jhash(&fh->fh_base, fh->fh_size, 0); |
6282cd56 | 759 | |
f54fe962 | 760 | spin_lock(&blocked_delegations_lock); |
6282cd56 N |
761 | __set_bit(hash&255, bd->set[bd->new]); |
762 | __set_bit((hash>>8)&255, bd->set[bd->new]); | |
763 | __set_bit((hash>>16)&255, bd->set[bd->new]); | |
764 | if (bd->entries == 0) | |
765 | bd->swap_time = seconds_since_boot(); | |
766 | bd->entries += 1; | |
f54fe962 | 767 | spin_unlock(&blocked_delegations_lock); |
6282cd56 N |
768 | } |
769 | ||
1da177e4 | 770 | static struct nfs4_delegation * |
8287f009 SB |
771 | alloc_init_deleg(struct nfs4_client *clp, struct svc_fh *current_fh, |
772 | struct nfs4_clnt_odstate *odstate) | |
1da177e4 LT |
773 | { |
774 | struct nfs4_delegation *dp; | |
02a3508d | 775 | long n; |
1da177e4 LT |
776 | |
777 | dprintk("NFSD alloc_init_deleg\n"); | |
02a3508d TM |
778 | n = atomic_long_inc_return(&num_delegations); |
779 | if (n < 0 || n > max_delegations) | |
780 | goto out_dec; | |
6282cd56 | 781 | if (delegation_blocked(¤t_fh->fh_handle)) |
02a3508d | 782 | goto out_dec; |
d19fb70d | 783 | dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab, nfs4_free_deleg)); |
5b2d21c1 | 784 | if (dp == NULL) |
02a3508d | 785 | goto out_dec; |
6011695d | 786 | |
2a74aba7 BF |
787 | /* |
788 | * delegation seqid's are never incremented. The 4.1 special | |
6136d2b4 BF |
789 | * meaning of seqid 0 isn't meaningful, really, but let's avoid |
790 | * 0 anyway just for consistency and use 1: | |
2a74aba7 BF |
791 | */ |
792 | dp->dl_stid.sc_stateid.si_generation = 1; | |
ea1da636 N |
793 | INIT_LIST_HEAD(&dp->dl_perfile); |
794 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 | 795 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
8287f009 SB |
796 | dp->dl_clnt_odstate = odstate; |
797 | get_clnt_odstate(odstate); | |
99c41515 | 798 | dp->dl_type = NFS4_OPEN_DELEGATE_READ; |
f0b5de1b CH |
799 | dp->dl_retries = 1; |
800 | nfsd4_init_cb(&dp->dl_recall, dp->dl_stid.sc_client, | |
0162ac2b | 801 | &nfsd4_cb_recall_ops, NFSPROC4_CLNT_CB_RECALL); |
1da177e4 | 802 | return dp; |
02a3508d TM |
803 | out_dec: |
804 | atomic_long_dec(&num_delegations); | |
805 | return NULL; | |
1da177e4 LT |
806 | } |
807 | ||
808 | void | |
6011695d | 809 | nfs4_put_stid(struct nfs4_stid *s) |
1da177e4 | 810 | { |
11b9164a | 811 | struct nfs4_file *fp = s->sc_file; |
6011695d TM |
812 | struct nfs4_client *clp = s->sc_client; |
813 | ||
4770d722 JL |
814 | might_lock(&clp->cl_lock); |
815 | ||
b401be22 JL |
816 | if (!atomic_dec_and_lock(&s->sc_count, &clp->cl_lock)) { |
817 | wake_up_all(&close_wq); | |
6011695d | 818 | return; |
b401be22 | 819 | } |
6011695d | 820 | idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id); |
4770d722 | 821 | spin_unlock(&clp->cl_lock); |
6011695d | 822 | s->sc_free(s); |
11b9164a TM |
823 | if (fp) |
824 | put_nfs4_file(fp); | |
1da177e4 LT |
825 | } |
826 | ||
9767feb2 JL |
827 | void |
828 | nfs4_inc_and_copy_stateid(stateid_t *dst, struct nfs4_stid *stid) | |
829 | { | |
830 | stateid_t *src = &stid->sc_stateid; | |
831 | ||
832 | spin_lock(&stid->sc_lock); | |
833 | if (unlikely(++src->si_generation == 0)) | |
834 | src->si_generation = 1; | |
835 | memcpy(dst, src, sizeof(*dst)); | |
836 | spin_unlock(&stid->sc_lock); | |
837 | } | |
838 | ||
acfdf5c3 | 839 | static void nfs4_put_deleg_lease(struct nfs4_file *fp) |
1da177e4 | 840 | { |
6bcc034e | 841 | struct file *filp = NULL; |
417c6629 | 842 | |
6bcc034e | 843 | spin_lock(&fp->fi_lock); |
67db1034 | 844 | if (fp->fi_deleg_file && --fp->fi_delegees == 0) |
6bcc034e | 845 | swap(filp, fp->fi_deleg_file); |
6bcc034e JL |
846 | spin_unlock(&fp->fi_lock); |
847 | ||
848 | if (filp) { | |
2ab99ee1 | 849 | vfs_setlease(filp, F_UNLCK, NULL, (void **)&fp); |
6bcc034e | 850 | fput(filp); |
acfdf5c3 | 851 | } |
1da177e4 LT |
852 | } |
853 | ||
cd61c522 | 854 | void nfs4_unhash_stid(struct nfs4_stid *s) |
6136d2b4 | 855 | { |
3abdb607 | 856 | s->sc_type = 0; |
6136d2b4 BF |
857 | } |
858 | ||
34ed9872 AE |
859 | /** |
860 | * nfs4_get_existing_delegation - Discover if this delegation already exists | |
861 | * @clp: a pointer to the nfs4_client we're granting a delegation to | |
862 | * @fp: a pointer to the nfs4_file we're granting a delegation on | |
863 | * | |
864 | * Return: | |
865 | * On success: NULL if an existing delegation was not found. | |
866 | * | |
867 | * On error: -EAGAIN if one was previously granted to this nfs4_client | |
868 | * for this nfs4_file. | |
869 | * | |
870 | */ | |
871 | ||
872 | static int | |
873 | nfs4_get_existing_delegation(struct nfs4_client *clp, struct nfs4_file *fp) | |
874 | { | |
875 | struct nfs4_delegation *searchdp = NULL; | |
876 | struct nfs4_client *searchclp = NULL; | |
877 | ||
878 | lockdep_assert_held(&state_lock); | |
879 | lockdep_assert_held(&fp->fi_lock); | |
880 | ||
881 | list_for_each_entry(searchdp, &fp->fi_delegations, dl_perfile) { | |
882 | searchclp = searchdp->dl_stid.sc_client; | |
883 | if (clp == searchclp) { | |
884 | return -EAGAIN; | |
885 | } | |
886 | } | |
887 | return 0; | |
888 | } | |
889 | ||
890 | /** | |
891 | * hash_delegation_locked - Add a delegation to the appropriate lists | |
892 | * @dp: a pointer to the nfs4_delegation we are adding. | |
893 | * @fp: a pointer to the nfs4_file we're granting a delegation on | |
894 | * | |
895 | * Return: | |
896 | * On success: NULL if the delegation was successfully hashed. | |
897 | * | |
898 | * On error: -EAGAIN if one was previously granted to this | |
899 | * nfs4_client for this nfs4_file. Delegation is not hashed. | |
900 | * | |
901 | */ | |
902 | ||
903 | static int | |
931ee56c BH |
904 | hash_delegation_locked(struct nfs4_delegation *dp, struct nfs4_file *fp) |
905 | { | |
34ed9872 AE |
906 | int status; |
907 | struct nfs4_client *clp = dp->dl_stid.sc_client; | |
908 | ||
cdc97505 | 909 | lockdep_assert_held(&state_lock); |
417c6629 | 910 | lockdep_assert_held(&fp->fi_lock); |
931ee56c | 911 | |
34ed9872 AE |
912 | status = nfs4_get_existing_delegation(clp, fp); |
913 | if (status) | |
914 | return status; | |
915 | ++fp->fi_delegees; | |
67cb1279 | 916 | atomic_inc(&dp->dl_stid.sc_count); |
3fb87d13 | 917 | dp->dl_stid.sc_type = NFS4_DELEG_STID; |
931ee56c | 918 | list_add(&dp->dl_perfile, &fp->fi_delegations); |
34ed9872 AE |
919 | list_add(&dp->dl_perclnt, &clp->cl_delegations); |
920 | return 0; | |
931ee56c BH |
921 | } |
922 | ||
3fcbbd24 | 923 | static bool |
42690676 | 924 | unhash_delegation_locked(struct nfs4_delegation *dp) |
1da177e4 | 925 | { |
11b9164a | 926 | struct nfs4_file *fp = dp->dl_stid.sc_file; |
02e1215f | 927 | |
42690676 JL |
928 | lockdep_assert_held(&state_lock); |
929 | ||
3fcbbd24 JL |
930 | if (list_empty(&dp->dl_perfile)) |
931 | return false; | |
932 | ||
b0fc29d6 | 933 | dp->dl_stid.sc_type = NFS4_CLOSED_DELEG_STID; |
d55a166c JL |
934 | /* Ensure that deleg break won't try to requeue it */ |
935 | ++dp->dl_time; | |
417c6629 | 936 | spin_lock(&fp->fi_lock); |
931ee56c | 937 | list_del_init(&dp->dl_perclnt); |
1da177e4 | 938 | list_del_init(&dp->dl_recall_lru); |
02e1215f JL |
939 | list_del_init(&dp->dl_perfile); |
940 | spin_unlock(&fp->fi_lock); | |
3fcbbd24 | 941 | return true; |
3bd64a5b BF |
942 | } |
943 | ||
3bd64a5b BF |
944 | static void destroy_delegation(struct nfs4_delegation *dp) |
945 | { | |
3fcbbd24 JL |
946 | bool unhashed; |
947 | ||
42690676 | 948 | spin_lock(&state_lock); |
3fcbbd24 | 949 | unhashed = unhash_delegation_locked(dp); |
42690676 | 950 | spin_unlock(&state_lock); |
3fcbbd24 JL |
951 | if (unhashed) { |
952 | put_clnt_odstate(dp->dl_clnt_odstate); | |
953 | nfs4_put_deleg_lease(dp->dl_stid.sc_file); | |
954 | nfs4_put_stid(&dp->dl_stid); | |
955 | } | |
3bd64a5b BF |
956 | } |
957 | ||
958 | static void revoke_delegation(struct nfs4_delegation *dp) | |
959 | { | |
960 | struct nfs4_client *clp = dp->dl_stid.sc_client; | |
961 | ||
2d4a532d JL |
962 | WARN_ON(!list_empty(&dp->dl_recall_lru)); |
963 | ||
8287f009 | 964 | put_clnt_odstate(dp->dl_clnt_odstate); |
afbda402 JL |
965 | nfs4_put_deleg_lease(dp->dl_stid.sc_file); |
966 | ||
3bd64a5b | 967 | if (clp->cl_minorversion == 0) |
6011695d | 968 | nfs4_put_stid(&dp->dl_stid); |
3bd64a5b | 969 | else { |
3bd64a5b | 970 | dp->dl_stid.sc_type = NFS4_REVOKED_DELEG_STID; |
2d4a532d JL |
971 | spin_lock(&clp->cl_lock); |
972 | list_add(&dp->dl_recall_lru, &clp->cl_revoked); | |
973 | spin_unlock(&clp->cl_lock); | |
3bd64a5b BF |
974 | } |
975 | } | |
976 | ||
1da177e4 LT |
977 | /* |
978 | * SETCLIENTID state | |
979 | */ | |
980 | ||
ddc04c41 BF |
981 | static unsigned int clientid_hashval(u32 id) |
982 | { | |
983 | return id & CLIENT_HASH_MASK; | |
984 | } | |
985 | ||
986 | static unsigned int clientstr_hashval(const char *name) | |
987 | { | |
988 | return opaque_hashval(name, 8) & CLIENT_HASH_MASK; | |
989 | } | |
990 | ||
f9d7562f BF |
991 | /* |
992 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
993 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
994 | * only what share bits are currently in force, but also what | |
995 | * combinations of share bits previous opens have used. This allows us | |
996 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
997 | * return an error if the client attempt to downgrade to a combination | |
998 | * of share bits not explicable by closing some of its previous opens. | |
999 | * | |
1000 | * XXX: This enforcement is actually incomplete, since we don't keep | |
1001 | * track of access/deny bit combinations; so, e.g., we allow: | |
1002 | * | |
1003 | * OPEN allow read, deny write | |
1004 | * OPEN allow both, deny none | |
1005 | * DOWNGRADE allow read, deny none | |
1006 | * | |
1007 | * which we should reject. | |
1008 | */ | |
5ae037e5 JL |
1009 | static unsigned int |
1010 | bmap_to_share_mode(unsigned long bmap) { | |
f9d7562f | 1011 | int i; |
5ae037e5 | 1012 | unsigned int access = 0; |
f9d7562f | 1013 | |
f9d7562f BF |
1014 | for (i = 1; i < 4; i++) { |
1015 | if (test_bit(i, &bmap)) | |
5ae037e5 | 1016 | access |= i; |
f9d7562f | 1017 | } |
5ae037e5 | 1018 | return access; |
f9d7562f BF |
1019 | } |
1020 | ||
82c5ff1b JL |
1021 | /* set share access for a given stateid */ |
1022 | static inline void | |
1023 | set_access(u32 access, struct nfs4_ol_stateid *stp) | |
1024 | { | |
c11c591f JL |
1025 | unsigned char mask = 1 << access; |
1026 | ||
1027 | WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH); | |
1028 | stp->st_access_bmap |= mask; | |
82c5ff1b JL |
1029 | } |
1030 | ||
1031 | /* clear share access for a given stateid */ | |
1032 | static inline void | |
1033 | clear_access(u32 access, struct nfs4_ol_stateid *stp) | |
1034 | { | |
c11c591f JL |
1035 | unsigned char mask = 1 << access; |
1036 | ||
1037 | WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH); | |
1038 | stp->st_access_bmap &= ~mask; | |
82c5ff1b JL |
1039 | } |
1040 | ||
1041 | /* test whether a given stateid has access */ | |
1042 | static inline bool | |
1043 | test_access(u32 access, struct nfs4_ol_stateid *stp) | |
1044 | { | |
c11c591f JL |
1045 | unsigned char mask = 1 << access; |
1046 | ||
1047 | return (bool)(stp->st_access_bmap & mask); | |
82c5ff1b JL |
1048 | } |
1049 | ||
ce0fc43c JL |
1050 | /* set share deny for a given stateid */ |
1051 | static inline void | |
c11c591f | 1052 | set_deny(u32 deny, struct nfs4_ol_stateid *stp) |
ce0fc43c | 1053 | { |
c11c591f JL |
1054 | unsigned char mask = 1 << deny; |
1055 | ||
1056 | WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH); | |
1057 | stp->st_deny_bmap |= mask; | |
ce0fc43c JL |
1058 | } |
1059 | ||
1060 | /* clear share deny for a given stateid */ | |
1061 | static inline void | |
c11c591f | 1062 | clear_deny(u32 deny, struct nfs4_ol_stateid *stp) |
ce0fc43c | 1063 | { |
c11c591f JL |
1064 | unsigned char mask = 1 << deny; |
1065 | ||
1066 | WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH); | |
1067 | stp->st_deny_bmap &= ~mask; | |
ce0fc43c JL |
1068 | } |
1069 | ||
1070 | /* test whether a given stateid is denying specific access */ | |
1071 | static inline bool | |
c11c591f | 1072 | test_deny(u32 deny, struct nfs4_ol_stateid *stp) |
ce0fc43c | 1073 | { |
c11c591f JL |
1074 | unsigned char mask = 1 << deny; |
1075 | ||
1076 | return (bool)(stp->st_deny_bmap & mask); | |
f9d7562f BF |
1077 | } |
1078 | ||
1079 | static int nfs4_access_to_omode(u32 access) | |
1080 | { | |
8f34a430 | 1081 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
1082 | case NFS4_SHARE_ACCESS_READ: |
1083 | return O_RDONLY; | |
1084 | case NFS4_SHARE_ACCESS_WRITE: | |
1085 | return O_WRONLY; | |
1086 | case NFS4_SHARE_ACCESS_BOTH: | |
1087 | return O_RDWR; | |
1088 | } | |
063b0fb9 BF |
1089 | WARN_ON_ONCE(1); |
1090 | return O_RDONLY; | |
f9d7562f BF |
1091 | } |
1092 | ||
baeb4ff0 JL |
1093 | /* |
1094 | * A stateid that had a deny mode associated with it is being released | |
1095 | * or downgraded. Recalculate the deny mode on the file. | |
1096 | */ | |
1097 | static void | |
1098 | recalculate_deny_mode(struct nfs4_file *fp) | |
1099 | { | |
1100 | struct nfs4_ol_stateid *stp; | |
1101 | ||
1102 | spin_lock(&fp->fi_lock); | |
1103 | fp->fi_share_deny = 0; | |
1104 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) | |
1105 | fp->fi_share_deny |= bmap_to_share_mode(stp->st_deny_bmap); | |
1106 | spin_unlock(&fp->fi_lock); | |
1107 | } | |
1108 | ||
1109 | static void | |
1110 | reset_union_bmap_deny(u32 deny, struct nfs4_ol_stateid *stp) | |
1111 | { | |
1112 | int i; | |
1113 | bool change = false; | |
1114 | ||
1115 | for (i = 1; i < 4; i++) { | |
1116 | if ((i & deny) != i) { | |
1117 | change = true; | |
1118 | clear_deny(i, stp); | |
1119 | } | |
1120 | } | |
1121 | ||
1122 | /* Recalculate per-file deny mode if there was a change */ | |
1123 | if (change) | |
11b9164a | 1124 | recalculate_deny_mode(stp->st_stid.sc_file); |
baeb4ff0 JL |
1125 | } |
1126 | ||
82c5ff1b JL |
1127 | /* release all access and file references for a given stateid */ |
1128 | static void | |
1129 | release_all_access(struct nfs4_ol_stateid *stp) | |
1130 | { | |
1131 | int i; | |
11b9164a | 1132 | struct nfs4_file *fp = stp->st_stid.sc_file; |
baeb4ff0 JL |
1133 | |
1134 | if (fp && stp->st_deny_bmap != 0) | |
1135 | recalculate_deny_mode(fp); | |
82c5ff1b JL |
1136 | |
1137 | for (i = 1; i < 4; i++) { | |
1138 | if (test_access(i, stp)) | |
11b9164a | 1139 | nfs4_file_put_access(stp->st_stid.sc_file, i); |
82c5ff1b JL |
1140 | clear_access(i, stp); |
1141 | } | |
1142 | } | |
1143 | ||
d50ffded KM |
1144 | static inline void nfs4_free_stateowner(struct nfs4_stateowner *sop) |
1145 | { | |
1146 | kfree(sop->so_owner.data); | |
1147 | sop->so_ops->so_free(sop); | |
1148 | } | |
1149 | ||
6b180f0b JL |
1150 | static void nfs4_put_stateowner(struct nfs4_stateowner *sop) |
1151 | { | |
a819ecc1 JL |
1152 | struct nfs4_client *clp = sop->so_client; |
1153 | ||
1154 | might_lock(&clp->cl_lock); | |
1155 | ||
1156 | if (!atomic_dec_and_lock(&sop->so_count, &clp->cl_lock)) | |
6b180f0b | 1157 | return; |
8f4b54c5 | 1158 | sop->so_ops->so_unhash(sop); |
a819ecc1 | 1159 | spin_unlock(&clp->cl_lock); |
d50ffded | 1160 | nfs4_free_stateowner(sop); |
6b180f0b JL |
1161 | } |
1162 | ||
e8568739 | 1163 | static bool unhash_ol_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 1164 | { |
11b9164a | 1165 | struct nfs4_file *fp = stp->st_stid.sc_file; |
1d31a253 | 1166 | |
1c755dc1 JL |
1167 | lockdep_assert_held(&stp->st_stateowner->so_client->cl_lock); |
1168 | ||
e8568739 JL |
1169 | if (list_empty(&stp->st_perfile)) |
1170 | return false; | |
1171 | ||
1d31a253 | 1172 | spin_lock(&fp->fi_lock); |
e8568739 | 1173 | list_del_init(&stp->st_perfile); |
1d31a253 | 1174 | spin_unlock(&fp->fi_lock); |
529d7b2a | 1175 | list_del(&stp->st_perstateowner); |
e8568739 | 1176 | return true; |
529d7b2a BF |
1177 | } |
1178 | ||
6011695d | 1179 | static void nfs4_free_ol_stateid(struct nfs4_stid *stid) |
529d7b2a | 1180 | { |
6011695d | 1181 | struct nfs4_ol_stateid *stp = openlockstateid(stid); |
4665e2ba | 1182 | |
8287f009 | 1183 | put_clnt_odstate(stp->st_clnt_odstate); |
6011695d | 1184 | release_all_access(stp); |
d3134b10 JL |
1185 | if (stp->st_stateowner) |
1186 | nfs4_put_stateowner(stp->st_stateowner); | |
6011695d | 1187 | kmem_cache_free(stateid_slab, stid); |
529d7b2a BF |
1188 | } |
1189 | ||
b49e084d | 1190 | static void nfs4_free_lock_stateid(struct nfs4_stid *stid) |
529d7b2a | 1191 | { |
b49e084d JL |
1192 | struct nfs4_ol_stateid *stp = openlockstateid(stid); |
1193 | struct nfs4_lockowner *lo = lockowner(stp->st_stateowner); | |
529d7b2a BF |
1194 | struct file *file; |
1195 | ||
b49e084d JL |
1196 | file = find_any_file(stp->st_stid.sc_file); |
1197 | if (file) | |
1198 | filp_close(file, (fl_owner_t)lo); | |
1199 | nfs4_free_ol_stateid(stid); | |
1200 | } | |
1201 | ||
2c41beb0 JL |
1202 | /* |
1203 | * Put the persistent reference to an already unhashed generic stateid, while | |
1204 | * holding the cl_lock. If it's the last reference, then put it onto the | |
1205 | * reaplist for later destruction. | |
1206 | */ | |
1207 | static void put_ol_stateid_locked(struct nfs4_ol_stateid *stp, | |
1208 | struct list_head *reaplist) | |
1209 | { | |
1210 | struct nfs4_stid *s = &stp->st_stid; | |
1211 | struct nfs4_client *clp = s->sc_client; | |
1212 | ||
1213 | lockdep_assert_held(&clp->cl_lock); | |
1214 | ||
1215 | WARN_ON_ONCE(!list_empty(&stp->st_locks)); | |
1216 | ||
1217 | if (!atomic_dec_and_test(&s->sc_count)) { | |
1218 | wake_up_all(&close_wq); | |
1219 | return; | |
1220 | } | |
1221 | ||
1222 | idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id); | |
1223 | list_add(&stp->st_locks, reaplist); | |
1224 | } | |
1225 | ||
e8568739 | 1226 | static bool unhash_lock_stateid(struct nfs4_ol_stateid *stp) |
b49e084d | 1227 | { |
f46c445b | 1228 | lockdep_assert_held(&stp->st_stid.sc_client->cl_lock); |
3c1c995c JL |
1229 | |
1230 | list_del_init(&stp->st_locks); | |
cd61c522 | 1231 | nfs4_unhash_stid(&stp->st_stid); |
e8568739 | 1232 | return unhash_ol_stateid(stp); |
3c1c995c JL |
1233 | } |
1234 | ||
1235 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) | |
1236 | { | |
f46c445b | 1237 | struct nfs4_client *clp = stp->st_stid.sc_client; |
e8568739 | 1238 | bool unhashed; |
3c1c995c | 1239 | |
f46c445b | 1240 | spin_lock(&clp->cl_lock); |
e8568739 | 1241 | unhashed = unhash_lock_stateid(stp); |
f46c445b | 1242 | spin_unlock(&clp->cl_lock); |
e8568739 JL |
1243 | if (unhashed) |
1244 | nfs4_put_stid(&stp->st_stid); | |
529d7b2a BF |
1245 | } |
1246 | ||
c58c6610 | 1247 | static void unhash_lockowner_locked(struct nfs4_lockowner *lo) |
8f4b54c5 | 1248 | { |
d4f0489f | 1249 | struct nfs4_client *clp = lo->lo_owner.so_client; |
c58c6610 | 1250 | |
d4f0489f | 1251 | lockdep_assert_held(&clp->cl_lock); |
c58c6610 | 1252 | |
8f4b54c5 JL |
1253 | list_del_init(&lo->lo_owner.so_strhash); |
1254 | } | |
1255 | ||
2c41beb0 JL |
1256 | /* |
1257 | * Free a list of generic stateids that were collected earlier after being | |
1258 | * fully unhashed. | |
1259 | */ | |
1260 | static void | |
1261 | free_ol_stateid_reaplist(struct list_head *reaplist) | |
1262 | { | |
1263 | struct nfs4_ol_stateid *stp; | |
fb94d766 | 1264 | struct nfs4_file *fp; |
2c41beb0 JL |
1265 | |
1266 | might_sleep(); | |
1267 | ||
1268 | while (!list_empty(reaplist)) { | |
1269 | stp = list_first_entry(reaplist, struct nfs4_ol_stateid, | |
1270 | st_locks); | |
1271 | list_del(&stp->st_locks); | |
fb94d766 | 1272 | fp = stp->st_stid.sc_file; |
2c41beb0 | 1273 | stp->st_stid.sc_free(&stp->st_stid); |
fb94d766 KM |
1274 | if (fp) |
1275 | put_nfs4_file(fp); | |
2c41beb0 JL |
1276 | } |
1277 | } | |
1278 | ||
d83017f9 JL |
1279 | static void release_open_stateid_locks(struct nfs4_ol_stateid *open_stp, |
1280 | struct list_head *reaplist) | |
3c87b9b7 TM |
1281 | { |
1282 | struct nfs4_ol_stateid *stp; | |
1283 | ||
e8568739 JL |
1284 | lockdep_assert_held(&open_stp->st_stid.sc_client->cl_lock); |
1285 | ||
3c87b9b7 TM |
1286 | while (!list_empty(&open_stp->st_locks)) { |
1287 | stp = list_entry(open_stp->st_locks.next, | |
1288 | struct nfs4_ol_stateid, st_locks); | |
e8568739 | 1289 | WARN_ON(!unhash_lock_stateid(stp)); |
d83017f9 | 1290 | put_ol_stateid_locked(stp, reaplist); |
529d7b2a BF |
1291 | } |
1292 | } | |
1293 | ||
e8568739 | 1294 | static bool unhash_open_stateid(struct nfs4_ol_stateid *stp, |
d83017f9 | 1295 | struct list_head *reaplist) |
2283963f | 1296 | { |
e8568739 JL |
1297 | bool unhashed; |
1298 | ||
2c41beb0 JL |
1299 | lockdep_assert_held(&stp->st_stid.sc_client->cl_lock); |
1300 | ||
e8568739 | 1301 | unhashed = unhash_ol_stateid(stp); |
d83017f9 | 1302 | release_open_stateid_locks(stp, reaplist); |
e8568739 | 1303 | return unhashed; |
38c387b5 BF |
1304 | } |
1305 | ||
1306 | static void release_open_stateid(struct nfs4_ol_stateid *stp) | |
1307 | { | |
2c41beb0 JL |
1308 | LIST_HEAD(reaplist); |
1309 | ||
1310 | spin_lock(&stp->st_stid.sc_client->cl_lock); | |
e8568739 JL |
1311 | if (unhash_open_stateid(stp, &reaplist)) |
1312 | put_ol_stateid_locked(stp, &reaplist); | |
2c41beb0 JL |
1313 | spin_unlock(&stp->st_stid.sc_client->cl_lock); |
1314 | free_ol_stateid_reaplist(&reaplist); | |
2283963f BF |
1315 | } |
1316 | ||
7ffb5880 | 1317 | static void unhash_openowner_locked(struct nfs4_openowner *oo) |
f1d110ca | 1318 | { |
d4f0489f | 1319 | struct nfs4_client *clp = oo->oo_owner.so_client; |
7ffb5880 | 1320 | |
d4f0489f | 1321 | lockdep_assert_held(&clp->cl_lock); |
7ffb5880 | 1322 | |
8f4b54c5 JL |
1323 | list_del_init(&oo->oo_owner.so_strhash); |
1324 | list_del_init(&oo->oo_perclient); | |
f1d110ca BF |
1325 | } |
1326 | ||
f7a4d872 BF |
1327 | static void release_last_closed_stateid(struct nfs4_openowner *oo) |
1328 | { | |
217526e7 JL |
1329 | struct nfsd_net *nn = net_generic(oo->oo_owner.so_client->net, |
1330 | nfsd_net_id); | |
1331 | struct nfs4_ol_stateid *s; | |
f7a4d872 | 1332 | |
217526e7 JL |
1333 | spin_lock(&nn->client_lock); |
1334 | s = oo->oo_last_closed_stid; | |
f7a4d872 | 1335 | if (s) { |
d3134b10 | 1336 | list_del_init(&oo->oo_close_lru); |
f7a4d872 BF |
1337 | oo->oo_last_closed_stid = NULL; |
1338 | } | |
217526e7 JL |
1339 | spin_unlock(&nn->client_lock); |
1340 | if (s) | |
1341 | nfs4_put_stid(&s->st_stid); | |
f7a4d872 BF |
1342 | } |
1343 | ||
2c41beb0 | 1344 | static void release_openowner(struct nfs4_openowner *oo) |
8f4b54c5 JL |
1345 | { |
1346 | struct nfs4_ol_stateid *stp; | |
d4f0489f | 1347 | struct nfs4_client *clp = oo->oo_owner.so_client; |
2c41beb0 | 1348 | struct list_head reaplist; |
7ffb5880 | 1349 | |
2c41beb0 | 1350 | INIT_LIST_HEAD(&reaplist); |
8f4b54c5 | 1351 | |
2c41beb0 JL |
1352 | spin_lock(&clp->cl_lock); |
1353 | unhash_openowner_locked(oo); | |
8f4b54c5 JL |
1354 | while (!list_empty(&oo->oo_owner.so_stateids)) { |
1355 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
1356 | struct nfs4_ol_stateid, st_perstateowner); | |
e8568739 JL |
1357 | if (unhash_open_stateid(stp, &reaplist)) |
1358 | put_ol_stateid_locked(stp, &reaplist); | |
8f4b54c5 | 1359 | } |
d4f0489f | 1360 | spin_unlock(&clp->cl_lock); |
2c41beb0 | 1361 | free_ol_stateid_reaplist(&reaplist); |
f7a4d872 | 1362 | release_last_closed_stateid(oo); |
6b180f0b | 1363 | nfs4_put_stateowner(&oo->oo_owner); |
f1d110ca BF |
1364 | } |
1365 | ||
5282fd72 ME |
1366 | static inline int |
1367 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
1368 | { | |
1369 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
1370 | ||
1371 | return sid->sequence % SESSION_HASH_SIZE; | |
1372 | } | |
1373 | ||
135dd002 | 1374 | #ifdef CONFIG_SUNRPC_DEBUG |
5282fd72 ME |
1375 | static inline void |
1376 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
1377 | { | |
1378 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
1379 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
1380 | } | |
8f199b82 TM |
1381 | #else |
1382 | static inline void | |
1383 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
1384 | { | |
1385 | } | |
1386 | #endif | |
1387 | ||
9411b1d4 BF |
1388 | /* |
1389 | * Bump the seqid on cstate->replay_owner, and clear replay_owner if it | |
1390 | * won't be used for replay. | |
1391 | */ | |
1392 | void nfsd4_bump_seqid(struct nfsd4_compound_state *cstate, __be32 nfserr) | |
1393 | { | |
1394 | struct nfs4_stateowner *so = cstate->replay_owner; | |
1395 | ||
1396 | if (nfserr == nfserr_replay_me) | |
1397 | return; | |
1398 | ||
1399 | if (!seqid_mutating_err(ntohl(nfserr))) { | |
58fb12e6 | 1400 | nfsd4_cstate_clear_replay(cstate); |
9411b1d4 BF |
1401 | return; |
1402 | } | |
1403 | if (!so) | |
1404 | return; | |
1405 | if (so->so_is_open_owner) | |
1406 | release_last_closed_stateid(openowner(so)); | |
1407 | so->so_seqid++; | |
1408 | return; | |
1409 | } | |
5282fd72 | 1410 | |
ec6b5d7b AA |
1411 | static void |
1412 | gen_sessionid(struct nfsd4_session *ses) | |
1413 | { | |
1414 | struct nfs4_client *clp = ses->se_client; | |
1415 | struct nfsd4_sessionid *sid; | |
1416 | ||
1417 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
1418 | sid->clientid = clp->cl_clientid; | |
1419 | sid->sequence = current_sessionid++; | |
1420 | sid->reserved = 0; | |
1421 | } | |
1422 | ||
1423 | /* | |
a649637c AA |
1424 | * The protocol defines ca_maxresponssize_cached to include the size of |
1425 | * the rpc header, but all we need to cache is the data starting after | |
1426 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
1427 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
1428 | * value that is the number of bytes in our cache plus a few additional | |
1429 | * bytes. In order to stay on the safe side, and not promise more than | |
1430 | * we can cache, those additional bytes must be the minimum possible: 24 | |
1431 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
1432 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
1433 | * for the SEQUENCE op response: | |
1434 | */ | |
1435 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
1436 | ||
557ce264 AA |
1437 | static void |
1438 | free_session_slots(struct nfsd4_session *ses) | |
1439 | { | |
1440 | int i; | |
1441 | ||
53da6a53 BF |
1442 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) { |
1443 | free_svc_cred(&ses->se_slots[i]->sl_cred); | |
557ce264 | 1444 | kfree(ses->se_slots[i]); |
53da6a53 | 1445 | } |
557ce264 AA |
1446 | } |
1447 | ||
a649637c | 1448 | /* |
efe0cb6d BF |
1449 | * We don't actually need to cache the rpc and session headers, so we |
1450 | * can allocate a little less for each slot: | |
1451 | */ | |
55c760cf | 1452 | static inline u32 slot_bytes(struct nfsd4_channel_attrs *ca) |
efe0cb6d | 1453 | { |
55c760cf | 1454 | u32 size; |
efe0cb6d | 1455 | |
55c760cf BF |
1456 | if (ca->maxresp_cached < NFSD_MIN_HDR_SEQ_SZ) |
1457 | size = 0; | |
1458 | else | |
1459 | size = ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
1460 | return size + sizeof(struct nfsd4_slot); | |
5b6feee9 | 1461 | } |
ec6b5d7b | 1462 | |
5b6feee9 BF |
1463 | /* |
1464 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c | 1465 | * re-negotiate active sessions and reduce their slot usage to make |
42b2aa86 | 1466 | * room for new connections. For now we just fail the create session. |
ec6b5d7b | 1467 | */ |
55c760cf | 1468 | static u32 nfsd4_get_drc_mem(struct nfsd4_channel_attrs *ca) |
ec6b5d7b | 1469 | { |
55c760cf BF |
1470 | u32 slotsize = slot_bytes(ca); |
1471 | u32 num = ca->maxreqs; | |
5b6feee9 | 1472 | int avail; |
ec6b5d7b | 1473 | |
5b6feee9 | 1474 | spin_lock(&nfsd_drc_lock); |
697ce9be ZY |
1475 | avail = min((unsigned long)NFSD_MAX_MEM_PER_SESSION, |
1476 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
de766e57 BF |
1477 | /* |
1478 | * Never use more than a third of the remaining memory, | |
1479 | * unless it's the only way to give this client a slot: | |
1480 | */ | |
1481 | avail = clamp_t(int, avail, slotsize, avail/3); | |
5b6feee9 BF |
1482 | num = min_t(int, num, avail / slotsize); |
1483 | nfsd_drc_mem_used += num * slotsize; | |
1484 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 1485 | |
5b6feee9 BF |
1486 | return num; |
1487 | } | |
ec6b5d7b | 1488 | |
55c760cf | 1489 | static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs *ca) |
5b6feee9 | 1490 | { |
55c760cf BF |
1491 | int slotsize = slot_bytes(ca); |
1492 | ||
4bd9b0f4 | 1493 | spin_lock(&nfsd_drc_lock); |
55c760cf | 1494 | nfsd_drc_mem_used -= slotsize * ca->maxreqs; |
4bd9b0f4 | 1495 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 1496 | } |
ec6b5d7b | 1497 | |
60810e54 KM |
1498 | static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fattrs, |
1499 | struct nfsd4_channel_attrs *battrs) | |
5b6feee9 | 1500 | { |
60810e54 KM |
1501 | int numslots = fattrs->maxreqs; |
1502 | int slotsize = slot_bytes(fattrs); | |
5b6feee9 BF |
1503 | struct nfsd4_session *new; |
1504 | int mem, i; | |
a649637c | 1505 | |
5b6feee9 BF |
1506 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
1507 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
1508 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 1509 | |
5b6feee9 BF |
1510 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
1511 | if (!new) | |
1512 | return NULL; | |
557ce264 | 1513 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 | 1514 | for (i = 0; i < numslots; i++) { |
55c760cf | 1515 | new->se_slots[i] = kzalloc(slotsize, GFP_KERNEL); |
5b6feee9 | 1516 | if (!new->se_slots[i]) |
557ce264 | 1517 | goto out_free; |
557ce264 | 1518 | } |
60810e54 KM |
1519 | |
1520 | memcpy(&new->se_fchannel, fattrs, sizeof(struct nfsd4_channel_attrs)); | |
1521 | memcpy(&new->se_bchannel, battrs, sizeof(struct nfsd4_channel_attrs)); | |
1522 | ||
5b6feee9 BF |
1523 | return new; |
1524 | out_free: | |
1525 | while (i--) | |
1526 | kfree(new->se_slots[i]); | |
1527 | kfree(new); | |
1528 | return NULL; | |
ec6b5d7b AA |
1529 | } |
1530 | ||
19cf5c02 BF |
1531 | static void free_conn(struct nfsd4_conn *c) |
1532 | { | |
1533 | svc_xprt_put(c->cn_xprt); | |
1534 | kfree(c); | |
1535 | } | |
ec6b5d7b | 1536 | |
19cf5c02 BF |
1537 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
1538 | { | |
1539 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
1540 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 1541 | |
19cf5c02 BF |
1542 | spin_lock(&clp->cl_lock); |
1543 | if (!list_empty(&c->cn_persession)) { | |
1544 | list_del(&c->cn_persession); | |
1545 | free_conn(c); | |
1546 | } | |
eea49806 | 1547 | nfsd4_probe_callback(clp); |
2e4b7239 | 1548 | spin_unlock(&clp->cl_lock); |
19cf5c02 | 1549 | } |
ec6b5d7b | 1550 | |
d29c374c | 1551 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 1552 | { |
c7662518 | 1553 | struct nfsd4_conn *conn; |
ec6b5d7b | 1554 | |
c7662518 BF |
1555 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
1556 | if (!conn) | |
db90681d | 1557 | return NULL; |
c7662518 BF |
1558 | svc_xprt_get(rqstp->rq_xprt); |
1559 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 1560 | conn->cn_flags = flags; |
db90681d BF |
1561 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
1562 | return conn; | |
1563 | } | |
a649637c | 1564 | |
328ead28 BF |
1565 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
1566 | { | |
1567 | conn->cn_session = ses; | |
1568 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
1569 | } |
1570 | ||
db90681d | 1571 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 1572 | { |
db90681d | 1573 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 1574 | |
c7662518 | 1575 | spin_lock(&clp->cl_lock); |
328ead28 | 1576 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 1577 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
1578 | } |
1579 | ||
21b75b01 | 1580 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 1581 | { |
19cf5c02 | 1582 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 1583 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
1584 | } |
1585 | ||
e1ff371f | 1586 | static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses) |
ec6b5d7b | 1587 | { |
21b75b01 | 1588 | int ret; |
ec6b5d7b | 1589 | |
db90681d | 1590 | nfsd4_hash_conn(conn, ses); |
21b75b01 BF |
1591 | ret = nfsd4_register_conn(conn); |
1592 | if (ret) | |
1593 | /* oops; xprt is already down: */ | |
1594 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
57a37144 BF |
1595 | /* We may have gained or lost a callback channel: */ |
1596 | nfsd4_probe_callback_sync(ses->se_client); | |
c7662518 | 1597 | } |
ec6b5d7b | 1598 | |
e1ff371f | 1599 | static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses) |
1d1bc8f2 BF |
1600 | { |
1601 | u32 dir = NFS4_CDFC4_FORE; | |
1602 | ||
e1ff371f | 1603 | if (cses->flags & SESSION4_BACK_CHAN) |
1d1bc8f2 | 1604 | dir |= NFS4_CDFC4_BACK; |
e1ff371f | 1605 | return alloc_conn(rqstp, dir); |
1d1bc8f2 BF |
1606 | } |
1607 | ||
1608 | /* must be called under client_lock */ | |
19cf5c02 | 1609 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 1610 | { |
19cf5c02 BF |
1611 | struct nfs4_client *clp = s->se_client; |
1612 | struct nfsd4_conn *c; | |
ec6b5d7b | 1613 | |
19cf5c02 BF |
1614 | spin_lock(&clp->cl_lock); |
1615 | while (!list_empty(&s->se_conns)) { | |
1616 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
1617 | list_del_init(&c->cn_persession); | |
1618 | spin_unlock(&clp->cl_lock); | |
557ce264 | 1619 | |
19cf5c02 BF |
1620 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
1621 | free_conn(c); | |
ec6b5d7b | 1622 | |
19cf5c02 BF |
1623 | spin_lock(&clp->cl_lock); |
1624 | } | |
1625 | spin_unlock(&clp->cl_lock); | |
c7662518 | 1626 | } |
ec6b5d7b | 1627 | |
1377b69e BF |
1628 | static void __free_session(struct nfsd4_session *ses) |
1629 | { | |
1377b69e BF |
1630 | free_session_slots(ses); |
1631 | kfree(ses); | |
1632 | } | |
1633 | ||
66b2b9b2 | 1634 | static void free_session(struct nfsd4_session *ses) |
c7662518 | 1635 | { |
19cf5c02 | 1636 | nfsd4_del_conns(ses); |
55c760cf | 1637 | nfsd4_put_drc_mem(&ses->se_fchannel); |
1377b69e | 1638 | __free_session(ses); |
c7662518 BF |
1639 | } |
1640 | ||
135ae827 | 1641 | static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
a827bcb2 | 1642 | { |
a827bcb2 | 1643 | int idx; |
1872de0e | 1644 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
a827bcb2 | 1645 | |
ec6b5d7b AA |
1646 | new->se_client = clp; |
1647 | gen_sessionid(new); | |
ec6b5d7b | 1648 | |
c7662518 BF |
1649 | INIT_LIST_HEAD(&new->se_conns); |
1650 | ||
ac7c46f2 | 1651 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 1652 | new->se_flags = cses->flags; |
8b5ce5cd | 1653 | new->se_cb_prog = cses->callback_prog; |
c6bb3ca2 | 1654 | new->se_cb_sec = cses->cb_sec; |
66b2b9b2 | 1655 | atomic_set(&new->se_ref, 0); |
5b6feee9 | 1656 | idx = hash_sessionid(&new->se_sessionid); |
1872de0e | 1657 | list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]); |
4c649378 | 1658 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 1659 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 1660 | spin_unlock(&clp->cl_lock); |
60810e54 | 1661 | |
b0d2e42c | 1662 | { |
edd76786 | 1663 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
1664 | /* |
1665 | * This is a little silly; with sessions there's no real | |
1666 | * use for the callback address. Use the peer address | |
1667 | * as a reasonable default for now, but consider fixing | |
1668 | * the rpc client not to require an address in the | |
1669 | * future: | |
1670 | */ | |
edd76786 BF |
1671 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
1672 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 1673 | } |
ec6b5d7b AA |
1674 | } |
1675 | ||
9089f1b4 | 1676 | /* caller must hold client_lock */ |
5282fd72 | 1677 | static struct nfsd4_session * |
d4e19e70 | 1678 | __find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net) |
5282fd72 ME |
1679 | { |
1680 | struct nfsd4_session *elem; | |
1681 | int idx; | |
1872de0e | 1682 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
5282fd72 | 1683 | |
0a880a28 TM |
1684 | lockdep_assert_held(&nn->client_lock); |
1685 | ||
5282fd72 ME |
1686 | dump_sessionid(__func__, sessionid); |
1687 | idx = hash_sessionid(sessionid); | |
5282fd72 | 1688 | /* Search in the appropriate list */ |
1872de0e | 1689 | list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) { |
5282fd72 ME |
1690 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
1691 | NFS4_MAX_SESSIONID_LEN)) { | |
1692 | return elem; | |
1693 | } | |
1694 | } | |
1695 | ||
1696 | dprintk("%s: session not found\n", __func__); | |
1697 | return NULL; | |
1698 | } | |
1699 | ||
d4e19e70 TM |
1700 | static struct nfsd4_session * |
1701 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net, | |
1702 | __be32 *ret) | |
1703 | { | |
1704 | struct nfsd4_session *session; | |
1705 | __be32 status = nfserr_badsession; | |
1706 | ||
1707 | session = __find_in_sessionid_hashtbl(sessionid, net); | |
1708 | if (!session) | |
1709 | goto out; | |
1710 | status = nfsd4_get_session_locked(session); | |
1711 | if (status) | |
1712 | session = NULL; | |
1713 | out: | |
1714 | *ret = status; | |
1715 | return session; | |
1716 | } | |
1717 | ||
9089f1b4 | 1718 | /* caller must hold client_lock */ |
7116ed6b | 1719 | static void |
5282fd72 | 1720 | unhash_session(struct nfsd4_session *ses) |
7116ed6b | 1721 | { |
0a880a28 TM |
1722 | struct nfs4_client *clp = ses->se_client; |
1723 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
1724 | ||
1725 | lockdep_assert_held(&nn->client_lock); | |
1726 | ||
7116ed6b | 1727 | list_del(&ses->se_hash); |
4c649378 | 1728 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 1729 | list_del(&ses->se_perclnt); |
4c649378 | 1730 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
1731 | } |
1732 | ||
1da177e4 LT |
1733 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
1734 | static int | |
2c142baa | 1735 | STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn) |
1da177e4 | 1736 | { |
bbc7f33a BF |
1737 | /* |
1738 | * We're assuming the clid was not given out from a boot | |
1739 | * precisely 2^32 (about 136 years) before this one. That seems | |
1740 | * a safe assumption: | |
1741 | */ | |
1742 | if (clid->cl_boot == (u32)nn->boot_time) | |
1da177e4 | 1743 | return 0; |
60adfc50 | 1744 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
2c142baa | 1745 | clid->cl_boot, clid->cl_id, nn->boot_time); |
1da177e4 LT |
1746 | return 1; |
1747 | } | |
1748 | ||
1749 | /* | |
1750 | * XXX Should we use a slab cache ? | |
1751 | * This type of memory management is somewhat inefficient, but we use it | |
1752 | * anyway since SETCLIENTID is not a common operation. | |
1753 | */ | |
35bba9a3 | 1754 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
1755 | { |
1756 | struct nfs4_client *clp; | |
d4f0489f | 1757 | int i; |
1da177e4 | 1758 | |
35bba9a3 BF |
1759 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
1760 | if (clp == NULL) | |
1761 | return NULL; | |
67114fe6 | 1762 | clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); |
d4f0489f TM |
1763 | if (clp->cl_name.data == NULL) |
1764 | goto err_no_name; | |
1765 | clp->cl_ownerstr_hashtbl = kmalloc(sizeof(struct list_head) * | |
1766 | OWNER_HASH_SIZE, GFP_KERNEL); | |
1767 | if (!clp->cl_ownerstr_hashtbl) | |
1768 | goto err_no_hashtbl; | |
1769 | for (i = 0; i < OWNER_HASH_SIZE; i++) | |
1770 | INIT_LIST_HEAD(&clp->cl_ownerstr_hashtbl[i]); | |
35bba9a3 | 1771 | clp->cl_name.len = name.len; |
5694c93e TM |
1772 | INIT_LIST_HEAD(&clp->cl_sessions); |
1773 | idr_init(&clp->cl_stateids); | |
1774 | atomic_set(&clp->cl_refcount, 0); | |
1775 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; | |
1776 | INIT_LIST_HEAD(&clp->cl_idhash); | |
1777 | INIT_LIST_HEAD(&clp->cl_openowners); | |
1778 | INIT_LIST_HEAD(&clp->cl_delegations); | |
1779 | INIT_LIST_HEAD(&clp->cl_lru); | |
5694c93e | 1780 | INIT_LIST_HEAD(&clp->cl_revoked); |
9cf514cc CH |
1781 | #ifdef CONFIG_NFSD_PNFS |
1782 | INIT_LIST_HEAD(&clp->cl_lo_states); | |
1783 | #endif | |
5694c93e TM |
1784 | spin_lock_init(&clp->cl_lock); |
1785 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1da177e4 | 1786 | return clp; |
d4f0489f TM |
1787 | err_no_hashtbl: |
1788 | kfree(clp->cl_name.data); | |
1789 | err_no_name: | |
1790 | kfree(clp); | |
1791 | return NULL; | |
1da177e4 LT |
1792 | } |
1793 | ||
4dd86e15 | 1794 | static void |
1da177e4 LT |
1795 | free_client(struct nfs4_client *clp) |
1796 | { | |
792c95dd BF |
1797 | while (!list_empty(&clp->cl_sessions)) { |
1798 | struct nfsd4_session *ses; | |
1799 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
1800 | se_perclnt); | |
1801 | list_del(&ses->se_perclnt); | |
66b2b9b2 BF |
1802 | WARN_ON_ONCE(atomic_read(&ses->se_ref)); |
1803 | free_session(ses); | |
792c95dd | 1804 | } |
4cb57e30 | 1805 | rpc_destroy_wait_queue(&clp->cl_cb_waitq); |
03a4e1f6 | 1806 | free_svc_cred(&clp->cl_cred); |
d4f0489f | 1807 | kfree(clp->cl_ownerstr_hashtbl); |
1da177e4 | 1808 | kfree(clp->cl_name.data); |
2d32b29a | 1809 | idr_destroy(&clp->cl_stateids); |
1da177e4 LT |
1810 | kfree(clp); |
1811 | } | |
1812 | ||
84d38ac9 | 1813 | /* must be called under the client_lock */ |
4beb345b | 1814 | static void |
84d38ac9 BH |
1815 | unhash_client_locked(struct nfs4_client *clp) |
1816 | { | |
4beb345b | 1817 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
792c95dd BF |
1818 | struct nfsd4_session *ses; |
1819 | ||
0a880a28 TM |
1820 | lockdep_assert_held(&nn->client_lock); |
1821 | ||
4beb345b TM |
1822 | /* Mark the client as expired! */ |
1823 | clp->cl_time = 0; | |
1824 | /* Make it invisible */ | |
1825 | if (!list_empty(&clp->cl_idhash)) { | |
1826 | list_del_init(&clp->cl_idhash); | |
1827 | if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) | |
1828 | rb_erase(&clp->cl_namenode, &nn->conf_name_tree); | |
1829 | else | |
1830 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); | |
1831 | } | |
1832 | list_del_init(&clp->cl_lru); | |
4c649378 | 1833 | spin_lock(&clp->cl_lock); |
792c95dd BF |
1834 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
1835 | list_del_init(&ses->se_hash); | |
4c649378 | 1836 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
1837 | } |
1838 | ||
1da177e4 | 1839 | static void |
4beb345b TM |
1840 | unhash_client(struct nfs4_client *clp) |
1841 | { | |
1842 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
1843 | ||
1844 | spin_lock(&nn->client_lock); | |
1845 | unhash_client_locked(clp); | |
1846 | spin_unlock(&nn->client_lock); | |
1847 | } | |
1848 | ||
97403d95 JL |
1849 | static __be32 mark_client_expired_locked(struct nfs4_client *clp) |
1850 | { | |
1851 | if (atomic_read(&clp->cl_refcount)) | |
1852 | return nfserr_jukebox; | |
1853 | unhash_client_locked(clp); | |
1854 | return nfs_ok; | |
1855 | } | |
1856 | ||
4beb345b TM |
1857 | static void |
1858 | __destroy_client(struct nfs4_client *clp) | |
1da177e4 | 1859 | { |
fe0750e5 | 1860 | struct nfs4_openowner *oo; |
1da177e4 | 1861 | struct nfs4_delegation *dp; |
1da177e4 LT |
1862 | struct list_head reaplist; |
1863 | ||
1da177e4 | 1864 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 1865 | spin_lock(&state_lock); |
ea1da636 N |
1866 | while (!list_empty(&clp->cl_delegations)) { |
1867 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
3fcbbd24 | 1868 | WARN_ON(!unhash_delegation_locked(dp)); |
42690676 | 1869 | list_add(&dp->dl_recall_lru, &reaplist); |
1da177e4 | 1870 | } |
cdc97505 | 1871 | spin_unlock(&state_lock); |
1da177e4 LT |
1872 | while (!list_empty(&reaplist)) { |
1873 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
42690676 | 1874 | list_del_init(&dp->dl_recall_lru); |
8287f009 | 1875 | put_clnt_odstate(dp->dl_clnt_odstate); |
afbda402 | 1876 | nfs4_put_deleg_lease(dp->dl_stid.sc_file); |
6011695d | 1877 | nfs4_put_stid(&dp->dl_stid); |
1da177e4 | 1878 | } |
2d4a532d | 1879 | while (!list_empty(&clp->cl_revoked)) { |
c876486b | 1880 | dp = list_entry(clp->cl_revoked.next, struct nfs4_delegation, dl_recall_lru); |
2d4a532d | 1881 | list_del_init(&dp->dl_recall_lru); |
6011695d | 1882 | nfs4_put_stid(&dp->dl_stid); |
956c4fee | 1883 | } |
ea1da636 | 1884 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 | 1885 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
b5971afa | 1886 | nfs4_get_stateowner(&oo->oo_owner); |
fe0750e5 | 1887 | release_openowner(oo); |
1da177e4 | 1888 | } |
9cf514cc | 1889 | nfsd4_return_all_client_layouts(clp); |
6ff8da08 | 1890 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
1891 | if (clp->cl_cb_conn.cb_xprt) |
1892 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
221a6876 | 1893 | free_client(clp); |
1da177e4 LT |
1894 | } |
1895 | ||
4beb345b TM |
1896 | static void |
1897 | destroy_client(struct nfs4_client *clp) | |
1898 | { | |
1899 | unhash_client(clp); | |
1900 | __destroy_client(clp); | |
1901 | } | |
1902 | ||
0d22f68f BF |
1903 | static void expire_client(struct nfs4_client *clp) |
1904 | { | |
4beb345b | 1905 | unhash_client(clp); |
0d22f68f | 1906 | nfsd4_client_record_remove(clp); |
4beb345b | 1907 | __destroy_client(clp); |
0d22f68f BF |
1908 | } |
1909 | ||
35bba9a3 BF |
1910 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
1911 | { | |
1912 | memcpy(target->cl_verifier.data, source->data, | |
1913 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
1914 | } |
1915 | ||
35bba9a3 BF |
1916 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
1917 | { | |
1da177e4 LT |
1918 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
1919 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
1920 | } | |
1921 | ||
50043859 BF |
1922 | static int copy_cred(struct svc_cred *target, struct svc_cred *source) |
1923 | { | |
2f10fdcb N |
1924 | target->cr_principal = kstrdup(source->cr_principal, GFP_KERNEL); |
1925 | target->cr_raw_principal = kstrdup(source->cr_raw_principal, | |
1926 | GFP_KERNEL); | |
1927 | if ((source->cr_principal && ! target->cr_principal) || | |
1928 | (source->cr_raw_principal && ! target->cr_raw_principal)) | |
1929 | return -ENOMEM; | |
50043859 | 1930 | |
d5497fc6 | 1931 | target->cr_flavor = source->cr_flavor; |
1da177e4 LT |
1932 | target->cr_uid = source->cr_uid; |
1933 | target->cr_gid = source->cr_gid; | |
1934 | target->cr_group_info = source->cr_group_info; | |
1935 | get_group_info(target->cr_group_info); | |
0dc1531a BF |
1936 | target->cr_gss_mech = source->cr_gss_mech; |
1937 | if (source->cr_gss_mech) | |
1938 | gss_mech_get(source->cr_gss_mech); | |
03a4e1f6 | 1939 | return 0; |
1da177e4 LT |
1940 | } |
1941 | ||
ef17af2a | 1942 | static int |
ac55fdc4 JL |
1943 | compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2) |
1944 | { | |
ef17af2a RV |
1945 | if (o1->len < o2->len) |
1946 | return -1; | |
1947 | if (o1->len > o2->len) | |
1948 | return 1; | |
1949 | return memcmp(o1->data, o2->data, o1->len); | |
ac55fdc4 JL |
1950 | } |
1951 | ||
35bba9a3 | 1952 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 1953 | { |
a55370a3 | 1954 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
1955 | } |
1956 | ||
1957 | static int | |
599e0a22 BF |
1958 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1959 | { | |
1960 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
1961 | } |
1962 | ||
1963 | static int | |
599e0a22 BF |
1964 | same_clid(clientid_t *cl1, clientid_t *cl2) |
1965 | { | |
1966 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1967 | } |
1968 | ||
8fbba96e BF |
1969 | static bool groups_equal(struct group_info *g1, struct group_info *g2) |
1970 | { | |
1971 | int i; | |
1972 | ||
1973 | if (g1->ngroups != g2->ngroups) | |
1974 | return false; | |
1975 | for (i=0; i<g1->ngroups; i++) | |
81243eac | 1976 | if (!gid_eq(g1->gid[i], g2->gid[i])) |
8fbba96e BF |
1977 | return false; |
1978 | return true; | |
1979 | } | |
1980 | ||
68eb3508 BF |
1981 | /* |
1982 | * RFC 3530 language requires clid_inuse be returned when the | |
1983 | * "principal" associated with a requests differs from that previously | |
1984 | * used. We use uid, gid's, and gss principal string as our best | |
1985 | * approximation. We also don't want to allow non-gss use of a client | |
1986 | * established using gss: in theory cr_principal should catch that | |
1987 | * change, but in practice cr_principal can be null even in the gss case | |
1988 | * since gssd doesn't always pass down a principal string. | |
1989 | */ | |
1990 | static bool is_gss_cred(struct svc_cred *cr) | |
1991 | { | |
1992 | /* Is cr_flavor one of the gss "pseudoflavors"?: */ | |
1993 | return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR); | |
1994 | } | |
1995 | ||
1996 | ||
5559b50a | 1997 | static bool |
599e0a22 BF |
1998 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
1999 | { | |
68eb3508 | 2000 | if ((is_gss_cred(cr1) != is_gss_cred(cr2)) |
6fab8779 EB |
2001 | || (!uid_eq(cr1->cr_uid, cr2->cr_uid)) |
2002 | || (!gid_eq(cr1->cr_gid, cr2->cr_gid)) | |
8fbba96e BF |
2003 | || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) |
2004 | return false; | |
2005 | if (cr1->cr_principal == cr2->cr_principal) | |
2006 | return true; | |
2007 | if (!cr1->cr_principal || !cr2->cr_principal) | |
2008 | return false; | |
5559b50a | 2009 | return 0 == strcmp(cr1->cr_principal, cr2->cr_principal); |
1da177e4 LT |
2010 | } |
2011 | ||
57266a6e BF |
2012 | static bool svc_rqst_integrity_protected(struct svc_rqst *rqstp) |
2013 | { | |
2014 | struct svc_cred *cr = &rqstp->rq_cred; | |
2015 | u32 service; | |
2016 | ||
c4720591 BF |
2017 | if (!cr->cr_gss_mech) |
2018 | return false; | |
57266a6e BF |
2019 | service = gss_pseudoflavor_to_service(cr->cr_gss_mech, cr->cr_flavor); |
2020 | return service == RPC_GSS_SVC_INTEGRITY || | |
2021 | service == RPC_GSS_SVC_PRIVACY; | |
2022 | } | |
2023 | ||
dedeb13f | 2024 | bool nfsd4_mach_creds_match(struct nfs4_client *cl, struct svc_rqst *rqstp) |
57266a6e BF |
2025 | { |
2026 | struct svc_cred *cr = &rqstp->rq_cred; | |
2027 | ||
2028 | if (!cl->cl_mach_cred) | |
2029 | return true; | |
2030 | if (cl->cl_cred.cr_gss_mech != cr->cr_gss_mech) | |
2031 | return false; | |
2032 | if (!svc_rqst_integrity_protected(rqstp)) | |
2033 | return false; | |
414ca017 BF |
2034 | if (cl->cl_cred.cr_raw_principal) |
2035 | return 0 == strcmp(cl->cl_cred.cr_raw_principal, | |
2036 | cr->cr_raw_principal); | |
57266a6e BF |
2037 | if (!cr->cr_principal) |
2038 | return false; | |
2039 | return 0 == strcmp(cl->cl_cred.cr_principal, cr->cr_principal); | |
2040 | } | |
2041 | ||
294ac32e | 2042 | static void gen_confirm(struct nfs4_client *clp, struct nfsd_net *nn) |
deda2faa | 2043 | { |
ab4684d1 | 2044 | __be32 verf[2]; |
1da177e4 | 2045 | |
f419992c JL |
2046 | /* |
2047 | * This is opaque to client, so no need to byte-swap. Use | |
2048 | * __force to keep sparse happy | |
2049 | */ | |
2050 | verf[0] = (__force __be32)get_seconds(); | |
19311aa8 | 2051 | verf[1] = (__force __be32)nn->clverifier_counter++; |
ab4684d1 | 2052 | memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); |
1da177e4 LT |
2053 | } |
2054 | ||
294ac32e JL |
2055 | static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn) |
2056 | { | |
2057 | clp->cl_clientid.cl_boot = nn->boot_time; | |
2058 | clp->cl_clientid.cl_id = nn->clientid_counter++; | |
2059 | gen_confirm(clp, nn); | |
2060 | } | |
2061 | ||
4770d722 JL |
2062 | static struct nfs4_stid * |
2063 | find_stateid_locked(struct nfs4_client *cl, stateid_t *t) | |
4581d140 | 2064 | { |
3abdb607 BF |
2065 | struct nfs4_stid *ret; |
2066 | ||
2067 | ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id); | |
2068 | if (!ret || !ret->sc_type) | |
2069 | return NULL; | |
2070 | return ret; | |
4d71ab87 BF |
2071 | } |
2072 | ||
4770d722 JL |
2073 | static struct nfs4_stid * |
2074 | find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) | |
f459e453 BF |
2075 | { |
2076 | struct nfs4_stid *s; | |
4d71ab87 | 2077 | |
4770d722 JL |
2078 | spin_lock(&cl->cl_lock); |
2079 | s = find_stateid_locked(cl, t); | |
2d3f9668 TM |
2080 | if (s != NULL) { |
2081 | if (typemask & s->sc_type) | |
2082 | atomic_inc(&s->sc_count); | |
2083 | else | |
2084 | s = NULL; | |
2085 | } | |
4770d722 JL |
2086 | spin_unlock(&cl->cl_lock); |
2087 | return s; | |
4581d140 BF |
2088 | } |
2089 | ||
2216d449 | 2090 | static struct nfs4_client *create_client(struct xdr_netobj name, |
b09333c4 RL |
2091 | struct svc_rqst *rqstp, nfs4_verifier *verf) |
2092 | { | |
2093 | struct nfs4_client *clp; | |
2094 | struct sockaddr *sa = svc_addr(rqstp); | |
03a4e1f6 | 2095 | int ret; |
c212cecf | 2096 | struct net *net = SVC_NET(rqstp); |
b09333c4 RL |
2097 | |
2098 | clp = alloc_client(name); | |
2099 | if (clp == NULL) | |
2100 | return NULL; | |
2101 | ||
03a4e1f6 BF |
2102 | ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); |
2103 | if (ret) { | |
03a4e1f6 | 2104 | free_client(clp); |
03a4e1f6 | 2105 | return NULL; |
b09333c4 | 2106 | } |
0162ac2b | 2107 | nfsd4_init_cb(&clp->cl_cb_null, clp, NULL, NFSPROC4_CLNT_CB_NULL); |
07cd4909 | 2108 | clp->cl_time = get_seconds(); |
b09333c4 | 2109 | clear_bit(0, &clp->cl_cb_slot_busy); |
b09333c4 RL |
2110 | copy_verf(clp, verf); |
2111 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
edd76786 | 2112 | clp->cl_cb_session = NULL; |
c212cecf | 2113 | clp->net = net; |
b09333c4 RL |
2114 | return clp; |
2115 | } | |
2116 | ||
fd39ca9a | 2117 | static void |
ac55fdc4 JL |
2118 | add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root) |
2119 | { | |
2120 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
2121 | struct nfs4_client *clp; | |
2122 | ||
2123 | while (*new) { | |
2124 | clp = rb_entry(*new, struct nfs4_client, cl_namenode); | |
2125 | parent = *new; | |
2126 | ||
2127 | if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0) | |
2128 | new = &((*new)->rb_left); | |
2129 | else | |
2130 | new = &((*new)->rb_right); | |
2131 | } | |
2132 | ||
2133 | rb_link_node(&new_clp->cl_namenode, parent, new); | |
2134 | rb_insert_color(&new_clp->cl_namenode, root); | |
2135 | } | |
2136 | ||
2137 | static struct nfs4_client * | |
2138 | find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root) | |
2139 | { | |
ef17af2a | 2140 | int cmp; |
ac55fdc4 JL |
2141 | struct rb_node *node = root->rb_node; |
2142 | struct nfs4_client *clp; | |
2143 | ||
2144 | while (node) { | |
2145 | clp = rb_entry(node, struct nfs4_client, cl_namenode); | |
2146 | cmp = compare_blob(&clp->cl_name, name); | |
2147 | if (cmp > 0) | |
2148 | node = node->rb_left; | |
2149 | else if (cmp < 0) | |
2150 | node = node->rb_right; | |
2151 | else | |
2152 | return clp; | |
2153 | } | |
2154 | return NULL; | |
2155 | } | |
2156 | ||
2157 | static void | |
2158 | add_to_unconfirmed(struct nfs4_client *clp) | |
1da177e4 LT |
2159 | { |
2160 | unsigned int idhashval; | |
0a7ec377 | 2161 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 2162 | |
0a880a28 TM |
2163 | lockdep_assert_held(&nn->client_lock); |
2164 | ||
ac55fdc4 | 2165 | clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
a99454aa | 2166 | add_clp_to_name_tree(clp, &nn->unconf_name_tree); |
1da177e4 | 2167 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
0a7ec377 | 2168 | list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]); |
3dbacee6 | 2169 | renew_client_locked(clp); |
1da177e4 LT |
2170 | } |
2171 | ||
fd39ca9a | 2172 | static void |
1da177e4 LT |
2173 | move_to_confirmed(struct nfs4_client *clp) |
2174 | { | |
2175 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
8daae4dc | 2176 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 2177 | |
0a880a28 TM |
2178 | lockdep_assert_held(&nn->client_lock); |
2179 | ||
1da177e4 | 2180 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); |
8daae4dc | 2181 | list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]); |
a99454aa | 2182 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
382a62e7 | 2183 | add_clp_to_name_tree(clp, &nn->conf_name_tree); |
ac55fdc4 | 2184 | set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
3dbacee6 | 2185 | renew_client_locked(clp); |
1da177e4 LT |
2186 | } |
2187 | ||
2188 | static struct nfs4_client * | |
bfa85e83 | 2189 | find_client_in_id_table(struct list_head *tbl, clientid_t *clid, bool sessions) |
1da177e4 LT |
2190 | { |
2191 | struct nfs4_client *clp; | |
2192 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
2193 | ||
bfa85e83 | 2194 | list_for_each_entry(clp, &tbl[idhashval], cl_idhash) { |
a50d2ad1 | 2195 | if (same_clid(&clp->cl_clientid, clid)) { |
d15c077e BF |
2196 | if ((bool)clp->cl_minorversion != sessions) |
2197 | return NULL; | |
3dbacee6 | 2198 | renew_client_locked(clp); |
1da177e4 | 2199 | return clp; |
a50d2ad1 | 2200 | } |
1da177e4 LT |
2201 | } |
2202 | return NULL; | |
2203 | } | |
2204 | ||
bfa85e83 BF |
2205 | static struct nfs4_client * |
2206 | find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) | |
2207 | { | |
2208 | struct list_head *tbl = nn->conf_id_hashtbl; | |
2209 | ||
0a880a28 | 2210 | lockdep_assert_held(&nn->client_lock); |
bfa85e83 BF |
2211 | return find_client_in_id_table(tbl, clid, sessions); |
2212 | } | |
2213 | ||
1da177e4 | 2214 | static struct nfs4_client * |
0a7ec377 | 2215 | find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
1da177e4 | 2216 | { |
bfa85e83 | 2217 | struct list_head *tbl = nn->unconf_id_hashtbl; |
1da177e4 | 2218 | |
0a880a28 | 2219 | lockdep_assert_held(&nn->client_lock); |
bfa85e83 | 2220 | return find_client_in_id_table(tbl, clid, sessions); |
1da177e4 LT |
2221 | } |
2222 | ||
6e5f15c9 | 2223 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 2224 | { |
6e5f15c9 | 2225 | return clp->cl_exchange_flags != 0; |
e203d506 | 2226 | } |
a1bcecd2 | 2227 | |
28ce6054 | 2228 | static struct nfs4_client * |
382a62e7 | 2229 | find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 2230 | { |
0a880a28 | 2231 | lockdep_assert_held(&nn->client_lock); |
382a62e7 | 2232 | return find_clp_in_name_tree(name, &nn->conf_name_tree); |
28ce6054 N |
2233 | } |
2234 | ||
2235 | static struct nfs4_client * | |
a99454aa | 2236 | find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 2237 | { |
0a880a28 | 2238 | lockdep_assert_held(&nn->client_lock); |
a99454aa | 2239 | return find_clp_in_name_tree(name, &nn->unconf_name_tree); |
28ce6054 N |
2240 | } |
2241 | ||
fd39ca9a | 2242 | static void |
6f3d772f | 2243 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 2244 | { |
07263f1e | 2245 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
2246 | struct sockaddr *sa = svc_addr(rqstp); |
2247 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
2248 | unsigned short expected_family; |
2249 | ||
2250 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
2251 | if (se->se_callback_netid_len == 3 && | |
2252 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
2253 | expected_family = AF_INET; | |
2254 | else if (se->se_callback_netid_len == 4 && | |
2255 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
2256 | expected_family = AF_INET6; | |
2257 | else | |
1da177e4 LT |
2258 | goto out_err; |
2259 | ||
c212cecf | 2260 | conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val, |
aa9a4ec7 | 2261 | se->se_callback_addr_len, |
07263f1e BF |
2262 | (struct sockaddr *)&conn->cb_addr, |
2263 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 2264 | |
07263f1e | 2265 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 2266 | goto out_err; |
aa9a4ec7 | 2267 | |
07263f1e BF |
2268 | if (conn->cb_addr.ss_family == AF_INET6) |
2269 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 2270 | |
07263f1e BF |
2271 | conn->cb_prog = se->se_callback_prog; |
2272 | conn->cb_ident = se->se_callback_ident; | |
849a1cf1 | 2273 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
1da177e4 LT |
2274 | return; |
2275 | out_err: | |
07263f1e BF |
2276 | conn->cb_addr.ss_family = AF_UNSPEC; |
2277 | conn->cb_addrlen = 0; | |
4ab495bf | 2278 | dprintk("NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
2279 | "will not receive delegations\n", |
2280 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
2281 | ||
1da177e4 LT |
2282 | return; |
2283 | } | |
2284 | ||
074fe897 | 2285 | /* |
067e1ace | 2286 | * Cache a reply. nfsd4_check_resp_size() has bounded the cache size. |
074fe897 | 2287 | */ |
b607664e | 2288 | static void |
074fe897 | 2289 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) |
074fe897 | 2290 | { |
f5236013 | 2291 | struct xdr_buf *buf = resp->xdr.buf; |
557ce264 AA |
2292 | struct nfsd4_slot *slot = resp->cstate.slot; |
2293 | unsigned int base; | |
074fe897 | 2294 | |
557ce264 | 2295 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 2296 | |
085def3a | 2297 | slot->sl_flags |= NFSD4_SLOT_INITIALIZED; |
557ce264 AA |
2298 | slot->sl_opcnt = resp->opcnt; |
2299 | slot->sl_status = resp->cstate.status; | |
53da6a53 BF |
2300 | free_svc_cred(&slot->sl_cred); |
2301 | copy_cred(&slot->sl_cred, &resp->rqstp->rq_cred); | |
074fe897 | 2302 | |
085def3a BF |
2303 | if (!nfsd4_cache_this(resp)) { |
2304 | slot->sl_flags &= ~NFSD4_SLOT_CACHED; | |
bf864a31 | 2305 | return; |
074fe897 | 2306 | } |
085def3a BF |
2307 | slot->sl_flags |= NFSD4_SLOT_CACHED; |
2308 | ||
f5236013 BF |
2309 | base = resp->cstate.data_offset; |
2310 | slot->sl_datalen = buf->len - base; | |
2311 | if (read_bytes_from_xdr_buf(buf, base, slot->sl_data, slot->sl_datalen)) | |
d3f03403 DC |
2312 | WARN(1, "%s: sessions DRC could not cache compound\n", |
2313 | __func__); | |
557ce264 | 2314 | return; |
074fe897 AA |
2315 | } |
2316 | ||
2317 | /* | |
abfabf8c AA |
2318 | * Encode the replay sequence operation from the slot values. |
2319 | * If cachethis is FALSE encode the uncached rep error on the next | |
2320 | * operation which sets resp->p and increments resp->opcnt for | |
2321 | * nfs4svc_encode_compoundres. | |
074fe897 | 2322 | * |
074fe897 | 2323 | */ |
abfabf8c AA |
2324 | static __be32 |
2325 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
2326 | struct nfsd4_compoundres *resp) | |
074fe897 | 2327 | { |
abfabf8c AA |
2328 | struct nfsd4_op *op; |
2329 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 2330 | |
abfabf8c AA |
2331 | /* Encode the replayed sequence operation */ |
2332 | op = &args->ops[resp->opcnt - 1]; | |
2333 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 2334 | |
085def3a BF |
2335 | if (slot->sl_flags & NFSD4_SLOT_CACHED) |
2336 | return op->status; | |
2337 | if (args->opcnt == 1) { | |
2338 | /* | |
2339 | * The original operation wasn't a solo sequence--we | |
2340 | * always cache those--so this retry must not match the | |
2341 | * original: | |
2342 | */ | |
2343 | op->status = nfserr_seq_false_retry; | |
2344 | } else { | |
abfabf8c AA |
2345 | op = &args->ops[resp->opcnt++]; |
2346 | op->status = nfserr_retry_uncached_rep; | |
2347 | nfsd4_encode_operation(resp, op); | |
074fe897 | 2348 | } |
abfabf8c | 2349 | return op->status; |
074fe897 AA |
2350 | } |
2351 | ||
2352 | /* | |
557ce264 AA |
2353 | * The sequence operation is not cached because we can use the slot and |
2354 | * session values. | |
074fe897 | 2355 | */ |
3ca2eb98 | 2356 | static __be32 |
bf864a31 AA |
2357 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
2358 | struct nfsd4_sequence *seq) | |
074fe897 | 2359 | { |
557ce264 | 2360 | struct nfsd4_slot *slot = resp->cstate.slot; |
f5236013 BF |
2361 | struct xdr_stream *xdr = &resp->xdr; |
2362 | __be32 *p; | |
074fe897 AA |
2363 | __be32 status; |
2364 | ||
557ce264 | 2365 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 2366 | |
abfabf8c | 2367 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); |
0da7b19c | 2368 | if (status) |
abfabf8c | 2369 | return status; |
074fe897 | 2370 | |
f5236013 BF |
2371 | p = xdr_reserve_space(xdr, slot->sl_datalen); |
2372 | if (!p) { | |
2373 | WARN_ON_ONCE(1); | |
2374 | return nfserr_serverfault; | |
2375 | } | |
2376 | xdr_encode_opaque_fixed(p, slot->sl_data, slot->sl_datalen); | |
2377 | xdr_commit_encode(xdr); | |
074fe897 | 2378 | |
557ce264 | 2379 | resp->opcnt = slot->sl_opcnt; |
f5236013 | 2380 | return slot->sl_status; |
074fe897 AA |
2381 | } |
2382 | ||
0733d213 AA |
2383 | /* |
2384 | * Set the exchange_id flags returned by the server. | |
2385 | */ | |
2386 | static void | |
2387 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
2388 | { | |
9cf514cc CH |
2389 | #ifdef CONFIG_NFSD_PNFS |
2390 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_PNFS_MDS; | |
2391 | #else | |
0733d213 | 2392 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; |
9cf514cc | 2393 | #endif |
0733d213 AA |
2394 | |
2395 | /* Referrals are supported, Migration is not. */ | |
2396 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
2397 | ||
2398 | /* set the wire flags to return to client. */ | |
2399 | clid->flags = new->cl_exchange_flags; | |
2400 | } | |
2401 | ||
4eaea134 BF |
2402 | static bool client_has_openowners(struct nfs4_client *clp) |
2403 | { | |
2404 | struct nfs4_openowner *oo; | |
2405 | ||
2406 | list_for_each_entry(oo, &clp->cl_openowners, oo_perclient) { | |
2407 | if (!list_empty(&oo->oo_owner.so_stateids)) | |
2408 | return true; | |
2409 | } | |
2410 | return false; | |
2411 | } | |
2412 | ||
631fc9ea BF |
2413 | static bool client_has_state(struct nfs4_client *clp) |
2414 | { | |
4eaea134 | 2415 | return client_has_openowners(clp) |
47e970be KM |
2416 | #ifdef CONFIG_NFSD_PNFS |
2417 | || !list_empty(&clp->cl_lo_states) | |
2418 | #endif | |
6eccece9 BF |
2419 | || !list_empty(&clp->cl_delegations) |
2420 | || !list_empty(&clp->cl_sessions); | |
631fc9ea BF |
2421 | } |
2422 | ||
069b6ad4 | 2423 | __be32 |
eb69853d CH |
2424 | nfsd4_exchange_id(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2425 | union nfsd4_op_u *u) | |
069b6ad4 | 2426 | { |
eb69853d | 2427 | struct nfsd4_exchange_id *exid = &u->exchange_id; |
3dbacee6 TM |
2428 | struct nfs4_client *conf, *new; |
2429 | struct nfs4_client *unconf = NULL; | |
57b7b43b | 2430 | __be32 status; |
363168b4 | 2431 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 2432 | nfs4_verifier verf = exid->verifier; |
363168b4 | 2433 | struct sockaddr *sa = svc_addr(rqstp); |
83e08fd4 | 2434 | bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; |
c212cecf | 2435 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
0733d213 | 2436 | |
363168b4 | 2437 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 2438 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 2439 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 2440 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 2441 | addr_str, exid->flags, exid->spa_how); |
0733d213 | 2442 | |
a084daf5 | 2443 | if (exid->flags & ~EXCHGID4_FLAG_MASK_A) |
0733d213 AA |
2444 | return nfserr_inval; |
2445 | ||
50c7b948 BF |
2446 | new = create_client(exid->clname, rqstp, &verf); |
2447 | if (new == NULL) | |
2448 | return nfserr_jukebox; | |
2449 | ||
0733d213 | 2450 | switch (exid->spa_how) { |
57266a6e | 2451 | case SP4_MACH_CRED: |
ed941643 AE |
2452 | exid->spo_must_enforce[0] = 0; |
2453 | exid->spo_must_enforce[1] = ( | |
2454 | 1 << (OP_BIND_CONN_TO_SESSION - 32) | | |
2455 | 1 << (OP_EXCHANGE_ID - 32) | | |
2456 | 1 << (OP_CREATE_SESSION - 32) | | |
2457 | 1 << (OP_DESTROY_SESSION - 32) | | |
2458 | 1 << (OP_DESTROY_CLIENTID - 32)); | |
2459 | ||
2460 | exid->spo_must_allow[0] &= (1 << (OP_CLOSE) | | |
2461 | 1 << (OP_OPEN_DOWNGRADE) | | |
2462 | 1 << (OP_LOCKU) | | |
2463 | 1 << (OP_DELEGRETURN)); | |
2464 | ||
2465 | exid->spo_must_allow[1] &= ( | |
2466 | 1 << (OP_TEST_STATEID - 32) | | |
2467 | 1 << (OP_FREE_STATEID - 32)); | |
50c7b948 BF |
2468 | if (!svc_rqst_integrity_protected(rqstp)) { |
2469 | status = nfserr_inval; | |
2470 | goto out_nolock; | |
920dd9bb BF |
2471 | } |
2472 | /* | |
2473 | * Sometimes userspace doesn't give us a principal. | |
2474 | * Which is a bug, really. Anyway, we can't enforce | |
2475 | * MACH_CRED in that case, better to give up now: | |
2476 | */ | |
414ca017 BF |
2477 | if (!new->cl_cred.cr_principal && |
2478 | !new->cl_cred.cr_raw_principal) { | |
920dd9bb BF |
2479 | status = nfserr_serverfault; |
2480 | goto out_nolock; | |
50c7b948 BF |
2481 | } |
2482 | new->cl_mach_cred = true; | |
0733d213 AA |
2483 | case SP4_NONE: |
2484 | break; | |
063b0fb9 BF |
2485 | default: /* checked by xdr code */ |
2486 | WARN_ON_ONCE(1); | |
0733d213 | 2487 | case SP4_SSV: |
8edf4b02 KM |
2488 | status = nfserr_encr_alg_unsupp; |
2489 | goto out_nolock; | |
0733d213 AA |
2490 | } |
2491 | ||
2dbb269d | 2492 | /* Cases below refer to rfc 5661 section 18.35.4: */ |
3dbacee6 | 2493 | spin_lock(&nn->client_lock); |
382a62e7 | 2494 | conf = find_confirmed_client_by_name(&exid->clname, nn); |
0733d213 | 2495 | if (conf) { |
83e08fd4 BF |
2496 | bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); |
2497 | bool verfs_match = same_verf(&verf, &conf->cl_verifier); | |
2498 | ||
136e658d BF |
2499 | if (update) { |
2500 | if (!clp_used_exchangeid(conf)) { /* buggy client */ | |
2dbb269d | 2501 | status = nfserr_inval; |
1a308118 BF |
2502 | goto out; |
2503 | } | |
dedeb13f | 2504 | if (!nfsd4_mach_creds_match(conf, rqstp)) { |
57266a6e BF |
2505 | status = nfserr_wrong_cred; |
2506 | goto out; | |
2507 | } | |
136e658d | 2508 | if (!creds_match) { /* case 9 */ |
ea236d07 | 2509 | status = nfserr_perm; |
136e658d BF |
2510 | goto out; |
2511 | } | |
2512 | if (!verfs_match) { /* case 8 */ | |
0733d213 AA |
2513 | status = nfserr_not_same; |
2514 | goto out; | |
2515 | } | |
136e658d BF |
2516 | /* case 6 */ |
2517 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
136e658d | 2518 | goto out_copy; |
0733d213 | 2519 | } |
136e658d | 2520 | if (!creds_match) { /* case 3 */ |
631fc9ea BF |
2521 | if (client_has_state(conf)) { |
2522 | status = nfserr_clid_inuse; | |
0733d213 AA |
2523 | goto out; |
2524 | } | |
0733d213 AA |
2525 | goto out_new; |
2526 | } | |
136e658d | 2527 | if (verfs_match) { /* case 2 */ |
0f1ba0ef | 2528 | conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; |
136e658d BF |
2529 | goto out_copy; |
2530 | } | |
2531 | /* case 5, client reboot */ | |
3dbacee6 | 2532 | conf = NULL; |
136e658d | 2533 | goto out_new; |
6ddbbbfe MS |
2534 | } |
2535 | ||
2dbb269d | 2536 | if (update) { /* case 7 */ |
6ddbbbfe MS |
2537 | status = nfserr_noent; |
2538 | goto out; | |
0733d213 AA |
2539 | } |
2540 | ||
a99454aa | 2541 | unconf = find_unconfirmed_client_by_name(&exid->clname, nn); |
2dbb269d | 2542 | if (unconf) /* case 4, possible retry or client restart */ |
3dbacee6 | 2543 | unhash_client_locked(unconf); |
0733d213 | 2544 | |
2dbb269d | 2545 | /* case 1 (normal case) */ |
0733d213 | 2546 | out_new: |
fd699b8a JL |
2547 | if (conf) { |
2548 | status = mark_client_expired_locked(conf); | |
2549 | if (status) | |
2550 | goto out; | |
2551 | } | |
4f540e29 | 2552 | new->cl_minorversion = cstate->minorversion; |
ed941643 AE |
2553 | new->cl_spo_must_allow.u.words[0] = exid->spo_must_allow[0]; |
2554 | new->cl_spo_must_allow.u.words[1] = exid->spo_must_allow[1]; | |
0733d213 | 2555 | |
c212cecf | 2556 | gen_clid(new, nn); |
ac55fdc4 | 2557 | add_to_unconfirmed(new); |
3dbacee6 | 2558 | swap(new, conf); |
0733d213 | 2559 | out_copy: |
5cc40fd7 TM |
2560 | exid->clientid.cl_boot = conf->cl_clientid.cl_boot; |
2561 | exid->clientid.cl_id = conf->cl_clientid.cl_id; | |
0733d213 | 2562 | |
5cc40fd7 TM |
2563 | exid->seqid = conf->cl_cs_slot.sl_seqid + 1; |
2564 | nfsd4_set_ex_flags(conf, exid); | |
0733d213 AA |
2565 | |
2566 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
5cc40fd7 | 2567 | conf->cl_cs_slot.sl_seqid, conf->cl_exchange_flags); |
0733d213 AA |
2568 | status = nfs_ok; |
2569 | ||
2570 | out: | |
3dbacee6 | 2571 | spin_unlock(&nn->client_lock); |
50c7b948 | 2572 | out_nolock: |
5cc40fd7 | 2573 | if (new) |
3dbacee6 TM |
2574 | expire_client(new); |
2575 | if (unconf) | |
2576 | expire_client(unconf); | |
0733d213 | 2577 | return status; |
069b6ad4 AA |
2578 | } |
2579 | ||
57b7b43b | 2580 | static __be32 |
88e588d5 | 2581 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 2582 | { |
88e588d5 AA |
2583 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
2584 | slot_seqid); | |
b85d4c01 BH |
2585 | |
2586 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
2587 | if (slot_inuse) { |
2588 | if (seqid == slot_seqid) | |
b85d4c01 BH |
2589 | return nfserr_jukebox; |
2590 | else | |
2591 | return nfserr_seq_misordered; | |
2592 | } | |
f6d82485 | 2593 | /* Note unsigned 32-bit arithmetic handles wraparound: */ |
88e588d5 | 2594 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 | 2595 | return nfs_ok; |
88e588d5 | 2596 | if (seqid == slot_seqid) |
b85d4c01 | 2597 | return nfserr_replay_cache; |
b85d4c01 BH |
2598 | return nfserr_seq_misordered; |
2599 | } | |
2600 | ||
49557cc7 AA |
2601 | /* |
2602 | * Cache the create session result into the create session single DRC | |
2603 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
2604 | * Do this for solo or embedded create session operations. | |
2605 | */ | |
2606 | static void | |
2607 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
57b7b43b | 2608 | struct nfsd4_clid_slot *slot, __be32 nfserr) |
49557cc7 AA |
2609 | { |
2610 | slot->sl_status = nfserr; | |
2611 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
2612 | } | |
2613 | ||
2614 | static __be32 | |
2615 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
2616 | struct nfsd4_clid_slot *slot) | |
2617 | { | |
2618 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
2619 | return slot->sl_status; | |
2620 | } | |
2621 | ||
1b74c25b MJ |
2622 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
2623 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
2624 | 1 + /* MIN tag is length with zero, only length */ \ | |
2625 | 3 + /* version, opcount, opcode */ \ | |
2626 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
2627 | /* seqid, slotID, slotID, cache */ \ | |
2628 | 4 ) * sizeof(__be32)) | |
2629 | ||
2630 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
2631 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
2632 | 1 + /* status */ \ | |
2633 | 1 + /* MIN tag is length with zero, only length */ \ | |
2634 | 3 + /* opcount, opcode, opstatus*/ \ | |
2635 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
2636 | /* seqid, slotID, slotID, slotID, status */ \ | |
2637 | 5 ) * sizeof(__be32)) | |
2638 | ||
55c760cf | 2639 | static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs *ca, struct nfsd_net *nn) |
1b74c25b | 2640 | { |
55c760cf BF |
2641 | u32 maxrpc = nn->nfsd_serv->sv_max_mesg; |
2642 | ||
373cd409 BF |
2643 | if (ca->maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ) |
2644 | return nfserr_toosmall; | |
2645 | if (ca->maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ) | |
2646 | return nfserr_toosmall; | |
55c760cf BF |
2647 | ca->headerpadsz = 0; |
2648 | ca->maxreq_sz = min_t(u32, ca->maxreq_sz, maxrpc); | |
2649 | ca->maxresp_sz = min_t(u32, ca->maxresp_sz, maxrpc); | |
2650 | ca->maxops = min_t(u32, ca->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
2651 | ca->maxresp_cached = min_t(u32, ca->maxresp_cached, | |
2652 | NFSD_SLOT_CACHE_SIZE + NFSD_MIN_HDR_SEQ_SZ); | |
2653 | ca->maxreqs = min_t(u32, ca->maxreqs, NFSD_MAX_SLOTS_PER_SESSION); | |
2654 | /* | |
2655 | * Note decreasing slot size below client's request may make it | |
2656 | * difficult for client to function correctly, whereas | |
2657 | * decreasing the number of slots will (just?) affect | |
2658 | * performance. When short on memory we therefore prefer to | |
2659 | * decrease number of slots instead of their size. Clients that | |
2660 | * request larger slots than they need will get poor results: | |
2661 | */ | |
2662 | ca->maxreqs = nfsd4_get_drc_mem(ca); | |
2663 | if (!ca->maxreqs) | |
2664 | return nfserr_jukebox; | |
2665 | ||
373cd409 | 2666 | return nfs_ok; |
1b74c25b MJ |
2667 | } |
2668 | ||
4500632f CL |
2669 | /* |
2670 | * Server's NFSv4.1 backchannel support is AUTH_SYS-only for now. | |
2671 | * These are based on similar macros in linux/sunrpc/msg_prot.h . | |
2672 | */ | |
2673 | #define RPC_MAX_HEADER_WITH_AUTH_SYS \ | |
2674 | (RPC_CALLHDRSIZE + 2 * (2 + UNX_CALLSLACK)) | |
2675 | ||
2676 | #define RPC_MAX_REPHEADER_WITH_AUTH_SYS \ | |
2677 | (RPC_REPHDRSIZE + (2 + NUL_REPLYSLACK)) | |
2678 | ||
8a891633 | 2679 | #define NFSD_CB_MAX_REQ_SZ ((NFS4_enc_cb_recall_sz + \ |
4500632f | 2680 | RPC_MAX_HEADER_WITH_AUTH_SYS) * sizeof(__be32)) |
8a891633 | 2681 | #define NFSD_CB_MAX_RESP_SZ ((NFS4_dec_cb_recall_sz + \ |
4500632f CL |
2682 | RPC_MAX_REPHEADER_WITH_AUTH_SYS) * \ |
2683 | sizeof(__be32)) | |
8a891633 | 2684 | |
06b332a5 | 2685 | static __be32 check_backchannel_attrs(struct nfsd4_channel_attrs *ca) |
1b74c25b | 2686 | { |
06b332a5 BF |
2687 | ca->headerpadsz = 0; |
2688 | ||
8a891633 | 2689 | if (ca->maxreq_sz < NFSD_CB_MAX_REQ_SZ) |
06b332a5 | 2690 | return nfserr_toosmall; |
8a891633 | 2691 | if (ca->maxresp_sz < NFSD_CB_MAX_RESP_SZ) |
06b332a5 BF |
2692 | return nfserr_toosmall; |
2693 | ca->maxresp_cached = 0; | |
2694 | if (ca->maxops < 2) | |
2695 | return nfserr_toosmall; | |
2696 | ||
2697 | return nfs_ok; | |
1b74c25b MJ |
2698 | } |
2699 | ||
b78724b7 BF |
2700 | static __be32 nfsd4_check_cb_sec(struct nfsd4_cb_sec *cbs) |
2701 | { | |
2702 | switch (cbs->flavor) { | |
2703 | case RPC_AUTH_NULL: | |
2704 | case RPC_AUTH_UNIX: | |
2705 | return nfs_ok; | |
2706 | default: | |
2707 | /* | |
2708 | * GSS case: the spec doesn't allow us to return this | |
2709 | * error. But it also doesn't allow us not to support | |
2710 | * GSS. | |
2711 | * I'd rather this fail hard than return some error the | |
2712 | * client might think it can already handle: | |
2713 | */ | |
2714 | return nfserr_encr_alg_unsupp; | |
2715 | } | |
2716 | } | |
2717 | ||
069b6ad4 AA |
2718 | __be32 |
2719 | nfsd4_create_session(struct svc_rqst *rqstp, | |
eb69853d | 2720 | struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) |
069b6ad4 | 2721 | { |
eb69853d | 2722 | struct nfsd4_create_session *cr_ses = &u->create_session; |
363168b4 | 2723 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 2724 | struct nfs4_client *conf, *unconf; |
d20c11d8 | 2725 | struct nfs4_client *old = NULL; |
ac7c46f2 | 2726 | struct nfsd4_session *new; |
81f0b2a4 | 2727 | struct nfsd4_conn *conn; |
49557cc7 | 2728 | struct nfsd4_clid_slot *cs_slot = NULL; |
57b7b43b | 2729 | __be32 status = 0; |
8daae4dc | 2730 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
ec6b5d7b | 2731 | |
a62573dc MJ |
2732 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
2733 | return nfserr_inval; | |
b78724b7 BF |
2734 | status = nfsd4_check_cb_sec(&cr_ses->cb_sec); |
2735 | if (status) | |
2736 | return status; | |
55c760cf | 2737 | status = check_forechannel_attrs(&cr_ses->fore_channel, nn); |
06b332a5 BF |
2738 | if (status) |
2739 | return status; | |
2740 | status = check_backchannel_attrs(&cr_ses->back_channel); | |
373cd409 | 2741 | if (status) |
f403e450 | 2742 | goto out_release_drc_mem; |
81f0b2a4 | 2743 | status = nfserr_jukebox; |
60810e54 | 2744 | new = alloc_session(&cr_ses->fore_channel, &cr_ses->back_channel); |
55c760cf BF |
2745 | if (!new) |
2746 | goto out_release_drc_mem; | |
81f0b2a4 BF |
2747 | conn = alloc_conn_from_crses(rqstp, cr_ses); |
2748 | if (!conn) | |
2749 | goto out_free_session; | |
a62573dc | 2750 | |
d20c11d8 | 2751 | spin_lock(&nn->client_lock); |
0a7ec377 | 2752 | unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn); |
8daae4dc | 2753 | conf = find_confirmed_client(&cr_ses->clientid, true, nn); |
78389046 | 2754 | WARN_ON_ONCE(conf && unconf); |
ec6b5d7b AA |
2755 | |
2756 | if (conf) { | |
57266a6e | 2757 | status = nfserr_wrong_cred; |
dedeb13f | 2758 | if (!nfsd4_mach_creds_match(conf, rqstp)) |
57266a6e | 2759 | goto out_free_conn; |
49557cc7 AA |
2760 | cs_slot = &conf->cl_cs_slot; |
2761 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
f5e22bb6 KM |
2762 | if (status) { |
2763 | if (status == nfserr_replay_cache) | |
2764 | status = nfsd4_replay_create_session(cr_ses, cs_slot); | |
81f0b2a4 | 2765 | goto out_free_conn; |
ec6b5d7b | 2766 | } |
ec6b5d7b AA |
2767 | } else if (unconf) { |
2768 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || | |
363168b4 | 2769 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b | 2770 | status = nfserr_clid_inuse; |
81f0b2a4 | 2771 | goto out_free_conn; |
ec6b5d7b | 2772 | } |
57266a6e | 2773 | status = nfserr_wrong_cred; |
dedeb13f | 2774 | if (!nfsd4_mach_creds_match(unconf, rqstp)) |
57266a6e | 2775 | goto out_free_conn; |
49557cc7 AA |
2776 | cs_slot = &unconf->cl_cs_slot; |
2777 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
2778 | if (status) { |
2779 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 2780 | status = nfserr_seq_misordered; |
81f0b2a4 | 2781 | goto out_free_conn; |
ec6b5d7b | 2782 | } |
382a62e7 | 2783 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
221a6876 | 2784 | if (old) { |
d20c11d8 | 2785 | status = mark_client_expired_locked(old); |
7abea1e8 JL |
2786 | if (status) { |
2787 | old = NULL; | |
221a6876 | 2788 | goto out_free_conn; |
7abea1e8 | 2789 | } |
221a6876 | 2790 | } |
8f9d3d3b | 2791 | move_to_confirmed(unconf); |
ec6b5d7b AA |
2792 | conf = unconf; |
2793 | } else { | |
2794 | status = nfserr_stale_clientid; | |
81f0b2a4 | 2795 | goto out_free_conn; |
ec6b5d7b | 2796 | } |
81f0b2a4 | 2797 | status = nfs_ok; |
4ce85c8c | 2798 | /* Persistent sessions are not supported */ |
408b79bc | 2799 | cr_ses->flags &= ~SESSION4_PERSIST; |
4ce85c8c | 2800 | /* Upshifting from TCP to RDMA is not supported */ |
408b79bc BF |
2801 | cr_ses->flags &= ~SESSION4_RDMA; |
2802 | ||
81f0b2a4 | 2803 | init_session(rqstp, new, conf, cr_ses); |
d20c11d8 | 2804 | nfsd4_get_session_locked(new); |
81f0b2a4 | 2805 | |
ac7c46f2 | 2806 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, |
ec6b5d7b | 2807 | NFS4_MAX_SESSIONID_LEN); |
86c3e16c | 2808 | cs_slot->sl_seqid++; |
49557cc7 | 2809 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 2810 | |
d20c11d8 | 2811 | /* cache solo and embedded create sessions under the client_lock */ |
49557cc7 | 2812 | nfsd4_cache_create_session(cr_ses, cs_slot, status); |
d20c11d8 JL |
2813 | spin_unlock(&nn->client_lock); |
2814 | /* init connection and backchannel */ | |
2815 | nfsd4_init_conn(rqstp, conn, new); | |
2816 | nfsd4_put_session(new); | |
d20c11d8 JL |
2817 | if (old) |
2818 | expire_client(old); | |
ec6b5d7b | 2819 | return status; |
81f0b2a4 | 2820 | out_free_conn: |
d20c11d8 | 2821 | spin_unlock(&nn->client_lock); |
81f0b2a4 | 2822 | free_conn(conn); |
d20c11d8 JL |
2823 | if (old) |
2824 | expire_client(old); | |
81f0b2a4 BF |
2825 | out_free_session: |
2826 | __free_session(new); | |
55c760cf BF |
2827 | out_release_drc_mem: |
2828 | nfsd4_put_drc_mem(&cr_ses->fore_channel); | |
1ca50792 | 2829 | return status; |
069b6ad4 AA |
2830 | } |
2831 | ||
1d1bc8f2 BF |
2832 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
2833 | { | |
2834 | switch (*dir) { | |
2835 | case NFS4_CDFC4_FORE: | |
2836 | case NFS4_CDFC4_BACK: | |
2837 | return nfs_ok; | |
2838 | case NFS4_CDFC4_FORE_OR_BOTH: | |
2839 | case NFS4_CDFC4_BACK_OR_BOTH: | |
2840 | *dir = NFS4_CDFC4_BOTH; | |
2841 | return nfs_ok; | |
2842 | }; | |
2843 | return nfserr_inval; | |
2844 | } | |
2845 | ||
eb69853d CH |
2846 | __be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, |
2847 | struct nfsd4_compound_state *cstate, | |
2848 | union nfsd4_op_u *u) | |
cb73a9f4 | 2849 | { |
eb69853d | 2850 | struct nfsd4_backchannel_ctl *bc = &u->backchannel_ctl; |
cb73a9f4 | 2851 | struct nfsd4_session *session = cstate->session; |
c9a49628 | 2852 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
b78724b7 | 2853 | __be32 status; |
cb73a9f4 | 2854 | |
b78724b7 BF |
2855 | status = nfsd4_check_cb_sec(&bc->bc_cb_sec); |
2856 | if (status) | |
2857 | return status; | |
c9a49628 | 2858 | spin_lock(&nn->client_lock); |
cb73a9f4 BF |
2859 | session->se_cb_prog = bc->bc_cb_program; |
2860 | session->se_cb_sec = bc->bc_cb_sec; | |
c9a49628 | 2861 | spin_unlock(&nn->client_lock); |
cb73a9f4 BF |
2862 | |
2863 | nfsd4_probe_callback(session->se_client); | |
2864 | ||
2865 | return nfs_ok; | |
2866 | } | |
2867 | ||
1d1bc8f2 BF |
2868 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, |
2869 | struct nfsd4_compound_state *cstate, | |
eb69853d | 2870 | union nfsd4_op_u *u) |
1d1bc8f2 | 2871 | { |
eb69853d | 2872 | struct nfsd4_bind_conn_to_session *bcts = &u->bind_conn_to_session; |
1d1bc8f2 | 2873 | __be32 status; |
3ba63671 | 2874 | struct nfsd4_conn *conn; |
4f6e6c17 | 2875 | struct nfsd4_session *session; |
d4e19e70 TM |
2876 | struct net *net = SVC_NET(rqstp); |
2877 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1d1bc8f2 BF |
2878 | |
2879 | if (!nfsd4_last_compound_op(rqstp)) | |
2880 | return nfserr_not_only_op; | |
c9a49628 | 2881 | spin_lock(&nn->client_lock); |
d4e19e70 | 2882 | session = find_in_sessionid_hashtbl(&bcts->sessionid, net, &status); |
c9a49628 | 2883 | spin_unlock(&nn->client_lock); |
4f6e6c17 | 2884 | if (!session) |
d4e19e70 | 2885 | goto out_no_session; |
57266a6e | 2886 | status = nfserr_wrong_cred; |
dedeb13f | 2887 | if (!nfsd4_mach_creds_match(session->se_client, rqstp)) |
57266a6e | 2888 | goto out; |
1d1bc8f2 | 2889 | status = nfsd4_map_bcts_dir(&bcts->dir); |
3ba63671 | 2890 | if (status) |
4f6e6c17 | 2891 | goto out; |
3ba63671 | 2892 | conn = alloc_conn(rqstp, bcts->dir); |
4f6e6c17 | 2893 | status = nfserr_jukebox; |
3ba63671 | 2894 | if (!conn) |
4f6e6c17 BF |
2895 | goto out; |
2896 | nfsd4_init_conn(rqstp, conn, session); | |
2897 | status = nfs_ok; | |
2898 | out: | |
d4e19e70 TM |
2899 | nfsd4_put_session(session); |
2900 | out_no_session: | |
4f6e6c17 | 2901 | return status; |
1d1bc8f2 BF |
2902 | } |
2903 | ||
5d4cec2f BF |
2904 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
2905 | { | |
2906 | if (!session) | |
2907 | return 0; | |
2908 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
2909 | } | |
2910 | ||
069b6ad4 | 2911 | __be32 |
eb69853d CH |
2912 | nfsd4_destroy_session(struct svc_rqst *r, struct nfsd4_compound_state *cstate, |
2913 | union nfsd4_op_u *u) | |
069b6ad4 | 2914 | { |
eb69853d | 2915 | struct nfsd4_destroy_session *sessionid = &u->destroy_session; |
e10e0cfc | 2916 | struct nfsd4_session *ses; |
abcdff09 | 2917 | __be32 status; |
f0f51f5c | 2918 | int ref_held_by_me = 0; |
d4e19e70 TM |
2919 | struct net *net = SVC_NET(r); |
2920 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
e10e0cfc | 2921 | |
abcdff09 | 2922 | status = nfserr_not_only_op; |
5d4cec2f | 2923 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 | 2924 | if (!nfsd4_last_compound_op(r)) |
abcdff09 | 2925 | goto out; |
f0f51f5c | 2926 | ref_held_by_me++; |
57716355 | 2927 | } |
e10e0cfc | 2928 | dump_sessionid(__func__, &sessionid->sessionid); |
c9a49628 | 2929 | spin_lock(&nn->client_lock); |
d4e19e70 | 2930 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid, net, &status); |
abcdff09 BF |
2931 | if (!ses) |
2932 | goto out_client_lock; | |
57266a6e | 2933 | status = nfserr_wrong_cred; |
dedeb13f | 2934 | if (!nfsd4_mach_creds_match(ses->se_client, r)) |
d4e19e70 | 2935 | goto out_put_session; |
f0f51f5c | 2936 | status = mark_session_dead_locked(ses, 1 + ref_held_by_me); |
66b2b9b2 | 2937 | if (status) |
f0f51f5c | 2938 | goto out_put_session; |
e10e0cfc | 2939 | unhash_session(ses); |
c9a49628 | 2940 | spin_unlock(&nn->client_lock); |
e10e0cfc | 2941 | |
84f5f7cc | 2942 | nfsd4_probe_callback_sync(ses->se_client); |
19cf5c02 | 2943 | |
c9a49628 | 2944 | spin_lock(&nn->client_lock); |
e10e0cfc | 2945 | status = nfs_ok; |
f0f51f5c | 2946 | out_put_session: |
d4e19e70 | 2947 | nfsd4_put_session_locked(ses); |
abcdff09 BF |
2948 | out_client_lock: |
2949 | spin_unlock(&nn->client_lock); | |
e10e0cfc | 2950 | out: |
e10e0cfc | 2951 | return status; |
069b6ad4 AA |
2952 | } |
2953 | ||
a663bdd8 | 2954 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
2955 | { |
2956 | struct nfsd4_conn *c; | |
2957 | ||
2958 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 2959 | if (c->cn_xprt == xpt) { |
328ead28 BF |
2960 | return c; |
2961 | } | |
2962 | } | |
2963 | return NULL; | |
2964 | } | |
2965 | ||
57266a6e | 2966 | static __be32 nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
2967 | { |
2968 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 2969 | struct nfsd4_conn *c; |
57266a6e | 2970 | __be32 status = nfs_ok; |
21b75b01 | 2971 | int ret; |
328ead28 BF |
2972 | |
2973 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 2974 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
57266a6e BF |
2975 | if (c) |
2976 | goto out_free; | |
2977 | status = nfserr_conn_not_bound_to_session; | |
2978 | if (clp->cl_mach_cred) | |
2979 | goto out_free; | |
328ead28 BF |
2980 | __nfsd4_hash_conn(new, ses); |
2981 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
2982 | ret = nfsd4_register_conn(new); |
2983 | if (ret) | |
2984 | /* oops; xprt is already down: */ | |
2985 | nfsd4_conn_lost(&new->cn_xpt_user); | |
57266a6e BF |
2986 | return nfs_ok; |
2987 | out_free: | |
2988 | spin_unlock(&clp->cl_lock); | |
2989 | free_conn(new); | |
2990 | return status; | |
328ead28 BF |
2991 | } |
2992 | ||
868b89c3 MJ |
2993 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
2994 | { | |
2995 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
2996 | ||
2997 | return args->opcnt > session->se_fchannel.maxops; | |
2998 | } | |
2999 | ||
ae82a8d0 MJ |
3000 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
3001 | struct nfsd4_session *session) | |
3002 | { | |
3003 | struct xdr_buf *xb = &rqstp->rq_arg; | |
3004 | ||
3005 | return xb->len > session->se_fchannel.maxreq_sz; | |
3006 | } | |
3007 | ||
53da6a53 BF |
3008 | static bool replay_matches_cache(struct svc_rqst *rqstp, |
3009 | struct nfsd4_sequence *seq, struct nfsd4_slot *slot) | |
3010 | { | |
3011 | struct nfsd4_compoundargs *argp = rqstp->rq_argp; | |
3012 | ||
3013 | if ((bool)(slot->sl_flags & NFSD4_SLOT_CACHETHIS) != | |
3014 | (bool)seq->cachethis) | |
3015 | return false; | |
3016 | /* | |
3017 | * If there's an error than the reply can have fewer ops than | |
3018 | * the call. But if we cached a reply with *more* ops than the | |
3019 | * call you're sending us now, then this new call is clearly not | |
3020 | * really a replay of the old one: | |
3021 | */ | |
3022 | if (slot->sl_opcnt < argp->opcnt) | |
3023 | return false; | |
3024 | /* This is the only check explicitly called by spec: */ | |
3025 | if (!same_creds(&rqstp->rq_cred, &slot->sl_cred)) | |
3026 | return false; | |
3027 | /* | |
3028 | * There may be more comparisons we could actually do, but the | |
3029 | * spec doesn't require us to catch every case where the calls | |
3030 | * don't match (that would require caching the call as well as | |
3031 | * the reply), so we don't bother. | |
3032 | */ | |
3033 | return true; | |
3034 | } | |
3035 | ||
069b6ad4 | 3036 | __be32 |
eb69853d CH |
3037 | nfsd4_sequence(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3038 | union nfsd4_op_u *u) | |
069b6ad4 | 3039 | { |
eb69853d | 3040 | struct nfsd4_sequence *seq = &u->sequence; |
f9bb94c4 | 3041 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
47ee5298 | 3042 | struct xdr_stream *xdr = &resp->xdr; |
b85d4c01 | 3043 | struct nfsd4_session *session; |
221a6876 | 3044 | struct nfs4_client *clp; |
b85d4c01 | 3045 | struct nfsd4_slot *slot; |
a663bdd8 | 3046 | struct nfsd4_conn *conn; |
57b7b43b | 3047 | __be32 status; |
47ee5298 | 3048 | int buflen; |
d4e19e70 TM |
3049 | struct net *net = SVC_NET(rqstp); |
3050 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
b85d4c01 | 3051 | |
f9bb94c4 AA |
3052 | if (resp->opcnt != 1) |
3053 | return nfserr_sequence_pos; | |
3054 | ||
a663bdd8 BF |
3055 | /* |
3056 | * Will be either used or freed by nfsd4_sequence_check_conn | |
3057 | * below. | |
3058 | */ | |
3059 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
3060 | if (!conn) | |
3061 | return nfserr_jukebox; | |
3062 | ||
c9a49628 | 3063 | spin_lock(&nn->client_lock); |
d4e19e70 | 3064 | session = find_in_sessionid_hashtbl(&seq->sessionid, net, &status); |
b85d4c01 | 3065 | if (!session) |
221a6876 BF |
3066 | goto out_no_session; |
3067 | clp = session->se_client; | |
b85d4c01 | 3068 | |
868b89c3 MJ |
3069 | status = nfserr_too_many_ops; |
3070 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
66b2b9b2 | 3071 | goto out_put_session; |
868b89c3 | 3072 | |
ae82a8d0 MJ |
3073 | status = nfserr_req_too_big; |
3074 | if (nfsd4_request_too_big(rqstp, session)) | |
66b2b9b2 | 3075 | goto out_put_session; |
ae82a8d0 | 3076 | |
b85d4c01 | 3077 | status = nfserr_badslot; |
6c18ba9f | 3078 | if (seq->slotid >= session->se_fchannel.maxreqs) |
66b2b9b2 | 3079 | goto out_put_session; |
b85d4c01 | 3080 | |
557ce264 | 3081 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
3082 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
3083 | ||
a8dfdaeb AA |
3084 | /* We do not negotiate the number of slots yet, so set the |
3085 | * maxslots to the session maxreqs which is used to encode | |
3086 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
3087 | seq->maxslots = session->se_fchannel.maxreqs; | |
3088 | ||
73e79482 BF |
3089 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, |
3090 | slot->sl_flags & NFSD4_SLOT_INUSE); | |
b85d4c01 | 3091 | if (status == nfserr_replay_cache) { |
bf5c43c8 BF |
3092 | status = nfserr_seq_misordered; |
3093 | if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) | |
66b2b9b2 | 3094 | goto out_put_session; |
53da6a53 BF |
3095 | status = nfserr_seq_false_retry; |
3096 | if (!replay_matches_cache(rqstp, seq, slot)) | |
3097 | goto out_put_session; | |
b85d4c01 BH |
3098 | cstate->slot = slot; |
3099 | cstate->session = session; | |
4b24ca7d | 3100 | cstate->clp = clp; |
da3846a2 | 3101 | /* Return the cached reply status and set cstate->status |
557ce264 | 3102 | * for nfsd4_proc_compound processing */ |
bf864a31 | 3103 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 3104 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 3105 | goto out; |
b85d4c01 BH |
3106 | } |
3107 | if (status) | |
66b2b9b2 | 3108 | goto out_put_session; |
b85d4c01 | 3109 | |
57266a6e | 3110 | status = nfsd4_sequence_check_conn(conn, session); |
a663bdd8 | 3111 | conn = NULL; |
57266a6e BF |
3112 | if (status) |
3113 | goto out_put_session; | |
328ead28 | 3114 | |
47ee5298 BF |
3115 | buflen = (seq->cachethis) ? |
3116 | session->se_fchannel.maxresp_cached : | |
3117 | session->se_fchannel.maxresp_sz; | |
3118 | status = (seq->cachethis) ? nfserr_rep_too_big_to_cache : | |
3119 | nfserr_rep_too_big; | |
a5cddc88 | 3120 | if (xdr_restrict_buflen(xdr, buflen - rqstp->rq_auth_slack)) |
47ee5298 | 3121 | goto out_put_session; |
32aaa62e | 3122 | svc_reserve(rqstp, buflen); |
47ee5298 BF |
3123 | |
3124 | status = nfs_ok; | |
b85d4c01 | 3125 | /* Success! bump slot seqid */ |
b85d4c01 | 3126 | slot->sl_seqid = seq->seqid; |
bf5c43c8 | 3127 | slot->sl_flags |= NFSD4_SLOT_INUSE; |
73e79482 BF |
3128 | if (seq->cachethis) |
3129 | slot->sl_flags |= NFSD4_SLOT_CACHETHIS; | |
bf5c43c8 BF |
3130 | else |
3131 | slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; | |
b85d4c01 BH |
3132 | |
3133 | cstate->slot = slot; | |
3134 | cstate->session = session; | |
4b24ca7d | 3135 | cstate->clp = clp; |
b85d4c01 | 3136 | |
b85d4c01 | 3137 | out: |
221a6876 BF |
3138 | switch (clp->cl_cb_state) { |
3139 | case NFSD4_CB_DOWN: | |
3140 | seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; | |
3141 | break; | |
3142 | case NFSD4_CB_FAULT: | |
3143 | seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; | |
3144 | break; | |
3145 | default: | |
3146 | seq->status_flags = 0; | |
aaf84eb9 | 3147 | } |
3bd64a5b BF |
3148 | if (!list_empty(&clp->cl_revoked)) |
3149 | seq->status_flags |= SEQ4_STATUS_RECALLABLE_STATE_REVOKED; | |
221a6876 | 3150 | out_no_session: |
3f42d2c4 KM |
3151 | if (conn) |
3152 | free_conn(conn); | |
c9a49628 | 3153 | spin_unlock(&nn->client_lock); |
b85d4c01 | 3154 | return status; |
66b2b9b2 | 3155 | out_put_session: |
d4e19e70 | 3156 | nfsd4_put_session_locked(session); |
221a6876 | 3157 | goto out_no_session; |
069b6ad4 AA |
3158 | } |
3159 | ||
b607664e TM |
3160 | void |
3161 | nfsd4_sequence_done(struct nfsd4_compoundres *resp) | |
3162 | { | |
3163 | struct nfsd4_compound_state *cs = &resp->cstate; | |
3164 | ||
3165 | if (nfsd4_has_session(cs)) { | |
b607664e TM |
3166 | if (cs->status != nfserr_replay_cache) { |
3167 | nfsd4_store_cache_entry(resp); | |
3168 | cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE; | |
3169 | } | |
d4e19e70 | 3170 | /* Drop session reference that was taken in nfsd4_sequence() */ |
b607664e | 3171 | nfsd4_put_session(cs->session); |
4b24ca7d JL |
3172 | } else if (cs->clp) |
3173 | put_client_renew(cs->clp); | |
b607664e TM |
3174 | } |
3175 | ||
345c2842 | 3176 | __be32 |
eb69853d CH |
3177 | nfsd4_destroy_clientid(struct svc_rqst *rqstp, |
3178 | struct nfsd4_compound_state *cstate, | |
3179 | union nfsd4_op_u *u) | |
345c2842 | 3180 | { |
eb69853d | 3181 | struct nfsd4_destroy_clientid *dc = &u->destroy_clientid; |
6b10ad19 TM |
3182 | struct nfs4_client *conf, *unconf; |
3183 | struct nfs4_client *clp = NULL; | |
57b7b43b | 3184 | __be32 status = 0; |
8daae4dc | 3185 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
345c2842 | 3186 | |
6b10ad19 | 3187 | spin_lock(&nn->client_lock); |
0a7ec377 | 3188 | unconf = find_unconfirmed_client(&dc->clientid, true, nn); |
8daae4dc | 3189 | conf = find_confirmed_client(&dc->clientid, true, nn); |
78389046 | 3190 | WARN_ON_ONCE(conf && unconf); |
345c2842 MJ |
3191 | |
3192 | if (conf) { | |
c0293b01 | 3193 | if (client_has_state(conf)) { |
345c2842 MJ |
3194 | status = nfserr_clientid_busy; |
3195 | goto out; | |
3196 | } | |
fd699b8a JL |
3197 | status = mark_client_expired_locked(conf); |
3198 | if (status) | |
3199 | goto out; | |
6b10ad19 | 3200 | clp = conf; |
345c2842 MJ |
3201 | } else if (unconf) |
3202 | clp = unconf; | |
3203 | else { | |
3204 | status = nfserr_stale_clientid; | |
3205 | goto out; | |
3206 | } | |
dedeb13f | 3207 | if (!nfsd4_mach_creds_match(clp, rqstp)) { |
6b10ad19 | 3208 | clp = NULL; |
57266a6e BF |
3209 | status = nfserr_wrong_cred; |
3210 | goto out; | |
3211 | } | |
6b10ad19 | 3212 | unhash_client_locked(clp); |
345c2842 | 3213 | out: |
6b10ad19 | 3214 | spin_unlock(&nn->client_lock); |
6b10ad19 TM |
3215 | if (clp) |
3216 | expire_client(clp); | |
345c2842 MJ |
3217 | return status; |
3218 | } | |
3219 | ||
4dc6ec00 | 3220 | __be32 |
eb69853d CH |
3221 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, |
3222 | struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) | |
4dc6ec00 | 3223 | { |
eb69853d | 3224 | struct nfsd4_reclaim_complete *rc = &u->reclaim_complete; |
57b7b43b | 3225 | __be32 status = 0; |
bcecf1cc | 3226 | |
4dc6ec00 BF |
3227 | if (rc->rca_one_fs) { |
3228 | if (!cstate->current_fh.fh_dentry) | |
3229 | return nfserr_nofilehandle; | |
3230 | /* | |
3231 | * We don't take advantage of the rca_one_fs case. | |
3232 | * That's OK, it's optional, we can safely ignore it. | |
3233 | */ | |
d28c442f | 3234 | return nfs_ok; |
4dc6ec00 | 3235 | } |
bcecf1cc | 3236 | |
bcecf1cc | 3237 | status = nfserr_complete_already; |
a52d726b JL |
3238 | if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, |
3239 | &cstate->session->se_client->cl_flags)) | |
bcecf1cc MJ |
3240 | goto out; |
3241 | ||
3242 | status = nfserr_stale_clientid; | |
3243 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
3244 | /* |
3245 | * The following error isn't really legal. | |
3246 | * But we only get here if the client just explicitly | |
3247 | * destroyed the client. Surely it no longer cares what | |
3248 | * error it gets back on an operation for the dead | |
3249 | * client. | |
3250 | */ | |
bcecf1cc MJ |
3251 | goto out; |
3252 | ||
3253 | status = nfs_ok; | |
2a4317c5 | 3254 | nfsd4_client_record_create(cstate->session->se_client); |
bcecf1cc | 3255 | out: |
bcecf1cc | 3256 | return status; |
4dc6ec00 BF |
3257 | } |
3258 | ||
b37ad28b | 3259 | __be32 |
b591480b | 3260 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 3261 | union nfsd4_op_u *u) |
1da177e4 | 3262 | { |
eb69853d | 3263 | struct nfsd4_setclientid *setclid = &u->setclientid; |
a084daf5 | 3264 | struct xdr_netobj clname = setclid->se_name; |
1da177e4 | 3265 | nfs4_verifier clverifier = setclid->se_verf; |
3dbacee6 TM |
3266 | struct nfs4_client *conf, *new; |
3267 | struct nfs4_client *unconf = NULL; | |
b37ad28b | 3268 | __be32 status; |
c212cecf SK |
3269 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
3270 | ||
5cc40fd7 TM |
3271 | new = create_client(clname, rqstp, &clverifier); |
3272 | if (new == NULL) | |
3273 | return nfserr_jukebox; | |
63db4632 | 3274 | /* Cases below refer to rfc 3530 section 14.2.33: */ |
3dbacee6 | 3275 | spin_lock(&nn->client_lock); |
382a62e7 | 3276 | conf = find_confirmed_client_by_name(&clname, nn); |
2b634821 | 3277 | if (conf && client_has_state(conf)) { |
63db4632 | 3278 | /* case 0: */ |
1da177e4 | 3279 | status = nfserr_clid_inuse; |
e203d506 BF |
3280 | if (clp_used_exchangeid(conf)) |
3281 | goto out; | |
026722c2 | 3282 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
3283 | char addr_str[INET6_ADDRSTRLEN]; |
3284 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
3285 | sizeof(addr_str)); | |
3286 | dprintk("NFSD: setclientid: string in use by client " | |
3287 | "at %s\n", addr_str); | |
1da177e4 LT |
3288 | goto out; |
3289 | } | |
1da177e4 | 3290 | } |
a99454aa | 3291 | unconf = find_unconfirmed_client_by_name(&clname, nn); |
8f930711 | 3292 | if (unconf) |
3dbacee6 | 3293 | unhash_client_locked(unconf); |
41eb1670 | 3294 | if (conf && same_verf(&conf->cl_verifier, &clverifier)) { |
63db4632 | 3295 | /* case 1: probable callback update */ |
1da177e4 | 3296 | copy_clid(new, conf); |
41eb1670 KM |
3297 | gen_confirm(new, nn); |
3298 | } else /* case 4 (new client) or cases 2, 3 (client reboot): */ | |
c212cecf | 3299 | gen_clid(new, nn); |
8323c3b2 | 3300 | new->cl_minorversion = 0; |
6f3d772f | 3301 | gen_callback(new, setclid, rqstp); |
ac55fdc4 | 3302 | add_to_unconfirmed(new); |
1da177e4 LT |
3303 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
3304 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
3305 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
5cc40fd7 | 3306 | new = NULL; |
1da177e4 LT |
3307 | status = nfs_ok; |
3308 | out: | |
3dbacee6 | 3309 | spin_unlock(&nn->client_lock); |
5cc40fd7 TM |
3310 | if (new) |
3311 | free_client(new); | |
3dbacee6 TM |
3312 | if (unconf) |
3313 | expire_client(unconf); | |
1da177e4 LT |
3314 | return status; |
3315 | } | |
3316 | ||
3317 | ||
b37ad28b | 3318 | __be32 |
b591480b | 3319 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
eb69853d CH |
3320 | struct nfsd4_compound_state *cstate, |
3321 | union nfsd4_op_u *u) | |
1da177e4 | 3322 | { |
eb69853d CH |
3323 | struct nfsd4_setclientid_confirm *setclientid_confirm = |
3324 | &u->setclientid_confirm; | |
21ab45a4 | 3325 | struct nfs4_client *conf, *unconf; |
d20c11d8 | 3326 | struct nfs4_client *old = NULL; |
1da177e4 LT |
3327 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
3328 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 3329 | __be32 status; |
7f2210fa | 3330 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 3331 | |
2c142baa | 3332 | if (STALE_CLIENTID(clid, nn)) |
1da177e4 | 3333 | return nfserr_stale_clientid; |
21ab45a4 | 3334 | |
d20c11d8 | 3335 | spin_lock(&nn->client_lock); |
8daae4dc | 3336 | conf = find_confirmed_client(clid, false, nn); |
0a7ec377 | 3337 | unconf = find_unconfirmed_client(clid, false, nn); |
a186e767 | 3338 | /* |
8695b90a BF |
3339 | * We try hard to give out unique clientid's, so if we get an |
3340 | * attempt to confirm the same clientid with a different cred, | |
f984a7ce BF |
3341 | * the client may be buggy; this should never happen. |
3342 | * | |
3343 | * Nevertheless, RFC 7530 recommends INUSE for this case: | |
a186e767 | 3344 | */ |
f984a7ce | 3345 | status = nfserr_clid_inuse; |
8695b90a BF |
3346 | if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) |
3347 | goto out; | |
3348 | if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) | |
3349 | goto out; | |
63db4632 | 3350 | /* cases below refer to rfc 3530 section 14.2.34: */ |
90d700b7 | 3351 | if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) { |
7d22fc11 BF |
3352 | if (conf && same_verf(&confirm, &conf->cl_confirm)) { |
3353 | /* case 2: probable retransmit */ | |
1da177e4 | 3354 | status = nfs_ok; |
7d22fc11 | 3355 | } else /* case 4: client hasn't noticed we rebooted yet? */ |
90d700b7 BF |
3356 | status = nfserr_stale_clientid; |
3357 | goto out; | |
3358 | } | |
3359 | status = nfs_ok; | |
3360 | if (conf) { /* case 1: callback update */ | |
d20c11d8 JL |
3361 | old = unconf; |
3362 | unhash_client_locked(old); | |
8695b90a | 3363 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
90d700b7 | 3364 | } else { /* case 3: normal case; new or rebooted client */ |
d20c11d8 JL |
3365 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
3366 | if (old) { | |
2b634821 BF |
3367 | status = nfserr_clid_inuse; |
3368 | if (client_has_state(old) | |
3369 | && !same_creds(&unconf->cl_cred, | |
3370 | &old->cl_cred)) | |
3371 | goto out; | |
d20c11d8 | 3372 | status = mark_client_expired_locked(old); |
7abea1e8 JL |
3373 | if (status) { |
3374 | old = NULL; | |
221a6876 | 3375 | goto out; |
7abea1e8 | 3376 | } |
221a6876 | 3377 | } |
8695b90a | 3378 | move_to_confirmed(unconf); |
d20c11d8 | 3379 | conf = unconf; |
08e8987c | 3380 | } |
d20c11d8 JL |
3381 | get_client_locked(conf); |
3382 | spin_unlock(&nn->client_lock); | |
3383 | nfsd4_probe_callback(conf); | |
3384 | spin_lock(&nn->client_lock); | |
3385 | put_client_renew_locked(conf); | |
1da177e4 | 3386 | out: |
d20c11d8 JL |
3387 | spin_unlock(&nn->client_lock); |
3388 | if (old) | |
3389 | expire_client(old); | |
1da177e4 LT |
3390 | return status; |
3391 | } | |
3392 | ||
32513b40 BF |
3393 | static struct nfs4_file *nfsd4_alloc_file(void) |
3394 | { | |
3395 | return kmem_cache_alloc(file_slab, GFP_KERNEL); | |
3396 | } | |
3397 | ||
1da177e4 | 3398 | /* OPEN Share state helper functions */ |
5b095e99 JL |
3399 | static void nfsd4_init_file(struct knfsd_fh *fh, unsigned int hashval, |
3400 | struct nfs4_file *fp) | |
1da177e4 | 3401 | { |
950e0118 TM |
3402 | lockdep_assert_held(&state_lock); |
3403 | ||
32513b40 | 3404 | atomic_set(&fp->fi_ref, 1); |
1d31a253 | 3405 | spin_lock_init(&fp->fi_lock); |
32513b40 BF |
3406 | INIT_LIST_HEAD(&fp->fi_stateids); |
3407 | INIT_LIST_HEAD(&fp->fi_delegations); | |
8287f009 | 3408 | INIT_LIST_HEAD(&fp->fi_clnt_odstate); |
e2cf80d7 | 3409 | fh_copy_shallow(&fp->fi_fhandle, fh); |
0c637be8 | 3410 | fp->fi_deleg_file = NULL; |
32513b40 | 3411 | fp->fi_had_conflict = false; |
baeb4ff0 | 3412 | fp->fi_share_deny = 0; |
32513b40 BF |
3413 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); |
3414 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
9cf514cc CH |
3415 | #ifdef CONFIG_NFSD_PNFS |
3416 | INIT_LIST_HEAD(&fp->fi_lo_states); | |
c5c707f9 | 3417 | atomic_set(&fp->fi_lo_recalls, 0); |
9cf514cc | 3418 | #endif |
5b095e99 | 3419 | hlist_add_head_rcu(&fp->fi_hash, &file_hashtbl[hashval]); |
1da177e4 LT |
3420 | } |
3421 | ||
e8ff2a84 | 3422 | void |
1da177e4 LT |
3423 | nfsd4_free_slabs(void) |
3424 | { | |
8287f009 | 3425 | kmem_cache_destroy(odstate_slab); |
abf1135b CH |
3426 | kmem_cache_destroy(openowner_slab); |
3427 | kmem_cache_destroy(lockowner_slab); | |
3428 | kmem_cache_destroy(file_slab); | |
3429 | kmem_cache_destroy(stateid_slab); | |
3430 | kmem_cache_destroy(deleg_slab); | |
e60d4398 | 3431 | } |
1da177e4 | 3432 | |
72083396 | 3433 | int |
e60d4398 N |
3434 | nfsd4_init_slabs(void) |
3435 | { | |
fe0750e5 BF |
3436 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
3437 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
3438 | if (openowner_slab == NULL) | |
abf1135b | 3439 | goto out; |
fe0750e5 | 3440 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", |
3c40794b | 3441 | sizeof(struct nfs4_lockowner), 0, 0, NULL); |
fe0750e5 | 3442 | if (lockowner_slab == NULL) |
abf1135b | 3443 | goto out_free_openowner_slab; |
e60d4398 | 3444 | file_slab = kmem_cache_create("nfsd4_files", |
20c2df83 | 3445 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 | 3446 | if (file_slab == NULL) |
abf1135b | 3447 | goto out_free_lockowner_slab; |
5ac049ac | 3448 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
dcef0413 | 3449 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
5ac049ac | 3450 | if (stateid_slab == NULL) |
abf1135b | 3451 | goto out_free_file_slab; |
5b2d21c1 | 3452 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 3453 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 | 3454 | if (deleg_slab == NULL) |
abf1135b | 3455 | goto out_free_stateid_slab; |
8287f009 SB |
3456 | odstate_slab = kmem_cache_create("nfsd4_odstate", |
3457 | sizeof(struct nfs4_clnt_odstate), 0, 0, NULL); | |
3458 | if (odstate_slab == NULL) | |
3459 | goto out_free_deleg_slab; | |
e60d4398 | 3460 | return 0; |
abf1135b | 3461 | |
8287f009 SB |
3462 | out_free_deleg_slab: |
3463 | kmem_cache_destroy(deleg_slab); | |
abf1135b CH |
3464 | out_free_stateid_slab: |
3465 | kmem_cache_destroy(stateid_slab); | |
3466 | out_free_file_slab: | |
3467 | kmem_cache_destroy(file_slab); | |
3468 | out_free_lockowner_slab: | |
3469 | kmem_cache_destroy(lockowner_slab); | |
3470 | out_free_openowner_slab: | |
3471 | kmem_cache_destroy(openowner_slab); | |
3472 | out: | |
e60d4398 N |
3473 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); |
3474 | return -ENOMEM; | |
1da177e4 LT |
3475 | } |
3476 | ||
ff194bd9 | 3477 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 3478 | { |
ff194bd9 BF |
3479 | rp->rp_status = nfserr_serverfault; |
3480 | rp->rp_buflen = 0; | |
3481 | rp->rp_buf = rp->rp_ibuf; | |
58fb12e6 JL |
3482 | mutex_init(&rp->rp_mutex); |
3483 | } | |
3484 | ||
3485 | static void nfsd4_cstate_assign_replay(struct nfsd4_compound_state *cstate, | |
3486 | struct nfs4_stateowner *so) | |
3487 | { | |
3488 | if (!nfsd4_has_session(cstate)) { | |
3489 | mutex_lock(&so->so_replay.rp_mutex); | |
b5971afa | 3490 | cstate->replay_owner = nfs4_get_stateowner(so); |
58fb12e6 JL |
3491 | } |
3492 | } | |
3493 | ||
3494 | void nfsd4_cstate_clear_replay(struct nfsd4_compound_state *cstate) | |
3495 | { | |
3496 | struct nfs4_stateowner *so = cstate->replay_owner; | |
3497 | ||
3498 | if (so != NULL) { | |
3499 | cstate->replay_owner = NULL; | |
3500 | mutex_unlock(&so->so_replay.rp_mutex); | |
3501 | nfs4_put_stateowner(so); | |
3502 | } | |
1da177e4 LT |
3503 | } |
3504 | ||
fe0750e5 | 3505 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 3506 | { |
1da177e4 | 3507 | struct nfs4_stateowner *sop; |
1da177e4 | 3508 | |
fe0750e5 | 3509 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
3510 | if (!sop) |
3511 | return NULL; | |
3512 | ||
3513 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); | |
3514 | if (!sop->so_owner.data) { | |
fe0750e5 | 3515 | kmem_cache_free(slab, sop); |
1da177e4 | 3516 | return NULL; |
ff194bd9 BF |
3517 | } |
3518 | sop->so_owner.len = owner->len; | |
3519 | ||
ea1da636 | 3520 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 BF |
3521 | sop->so_client = clp; |
3522 | init_nfs4_replay(&sop->so_replay); | |
6b180f0b | 3523 | atomic_set(&sop->so_count, 1); |
ff194bd9 BF |
3524 | return sop; |
3525 | } | |
3526 | ||
fe0750e5 | 3527 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 | 3528 | { |
d4f0489f | 3529 | lockdep_assert_held(&clp->cl_lock); |
9b531137 | 3530 | |
d4f0489f TM |
3531 | list_add(&oo->oo_owner.so_strhash, |
3532 | &clp->cl_ownerstr_hashtbl[strhashval]); | |
fe0750e5 | 3533 | list_add(&oo->oo_perclient, &clp->cl_openowners); |
ff194bd9 BF |
3534 | } |
3535 | ||
8f4b54c5 JL |
3536 | static void nfs4_unhash_openowner(struct nfs4_stateowner *so) |
3537 | { | |
d4f0489f | 3538 | unhash_openowner_locked(openowner(so)); |
8f4b54c5 JL |
3539 | } |
3540 | ||
6b180f0b JL |
3541 | static void nfs4_free_openowner(struct nfs4_stateowner *so) |
3542 | { | |
3543 | struct nfs4_openowner *oo = openowner(so); | |
3544 | ||
3545 | kmem_cache_free(openowner_slab, oo); | |
3546 | } | |
3547 | ||
3548 | static const struct nfs4_stateowner_operations openowner_ops = { | |
8f4b54c5 JL |
3549 | .so_unhash = nfs4_unhash_openowner, |
3550 | .so_free = nfs4_free_openowner, | |
6b180f0b JL |
3551 | }; |
3552 | ||
7fc0564e AE |
3553 | static struct nfs4_ol_stateid * |
3554 | nfsd4_find_existing_open(struct nfs4_file *fp, struct nfsd4_open *open) | |
3555 | { | |
3556 | struct nfs4_ol_stateid *local, *ret = NULL; | |
3557 | struct nfs4_openowner *oo = open->op_openowner; | |
3558 | ||
3559 | lockdep_assert_held(&fp->fi_lock); | |
3560 | ||
3561 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { | |
3562 | /* ignore lock owners */ | |
3563 | if (local->st_stateowner->so_is_open_owner == 0) | |
3564 | continue; | |
3565 | if (local->st_stateowner == &oo->oo_owner) { | |
3566 | ret = local; | |
3567 | atomic_inc(&ret->st_stid.sc_count); | |
3568 | break; | |
3569 | } | |
3570 | } | |
3571 | return ret; | |
3572 | } | |
3573 | ||
fe0750e5 | 3574 | static struct nfs4_openowner * |
13d6f66b | 3575 | alloc_init_open_stateowner(unsigned int strhashval, struct nfsd4_open *open, |
db24b3b4 JL |
3576 | struct nfsd4_compound_state *cstate) |
3577 | { | |
13d6f66b | 3578 | struct nfs4_client *clp = cstate->clp; |
7ffb5880 | 3579 | struct nfs4_openowner *oo, *ret; |
ff194bd9 | 3580 | |
fe0750e5 BF |
3581 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
3582 | if (!oo) | |
ff194bd9 | 3583 | return NULL; |
6b180f0b | 3584 | oo->oo_owner.so_ops = &openowner_ops; |
fe0750e5 BF |
3585 | oo->oo_owner.so_is_open_owner = 1; |
3586 | oo->oo_owner.so_seqid = open->op_seqid; | |
d3134b10 | 3587 | oo->oo_flags = 0; |
db24b3b4 JL |
3588 | if (nfsd4_has_session(cstate)) |
3589 | oo->oo_flags |= NFS4_OO_CONFIRMED; | |
fe0750e5 | 3590 | oo->oo_time = 0; |
38c387b5 | 3591 | oo->oo_last_closed_stid = NULL; |
fe0750e5 | 3592 | INIT_LIST_HEAD(&oo->oo_close_lru); |
d4f0489f TM |
3593 | spin_lock(&clp->cl_lock); |
3594 | ret = find_openstateowner_str_locked(strhashval, open, clp); | |
7ffb5880 TM |
3595 | if (ret == NULL) { |
3596 | hash_openowner(oo, clp, strhashval); | |
3597 | ret = oo; | |
3598 | } else | |
d50ffded KM |
3599 | nfs4_free_stateowner(&oo->oo_owner); |
3600 | ||
d4f0489f | 3601 | spin_unlock(&clp->cl_lock); |
c5952338 | 3602 | return ret; |
1da177e4 LT |
3603 | } |
3604 | ||
7fc0564e | 3605 | static struct nfs4_ol_stateid * |
8c7245ab | 3606 | init_open_stateid(struct nfs4_file *fp, struct nfsd4_open *open) |
7fc0564e AE |
3607 | { |
3608 | ||
fe0750e5 | 3609 | struct nfs4_openowner *oo = open->op_openowner; |
7fc0564e | 3610 | struct nfs4_ol_stateid *retstp = NULL; |
8c7245ab | 3611 | struct nfs4_ol_stateid *stp; |
1da177e4 | 3612 | |
8c7245ab | 3613 | stp = open->op_stp; |
5cc1fb2a OD |
3614 | /* We are moving these outside of the spinlocks to avoid the warnings */ |
3615 | mutex_init(&stp->st_mutex); | |
3616 | mutex_lock(&stp->st_mutex); | |
3617 | ||
7fc0564e AE |
3618 | spin_lock(&oo->oo_owner.so_client->cl_lock); |
3619 | spin_lock(&fp->fi_lock); | |
3620 | ||
3621 | retstp = nfsd4_find_existing_open(fp, open); | |
3622 | if (retstp) | |
3623 | goto out_unlock; | |
8c7245ab OD |
3624 | |
3625 | open->op_stp = NULL; | |
d6f2bc5d | 3626 | atomic_inc(&stp->st_stid.sc_count); |
3abdb607 | 3627 | stp->st_stid.sc_type = NFS4_OPEN_STID; |
3c87b9b7 | 3628 | INIT_LIST_HEAD(&stp->st_locks); |
b5971afa | 3629 | stp->st_stateowner = nfs4_get_stateowner(&oo->oo_owner); |
13cd2184 | 3630 | get_nfs4_file(fp); |
11b9164a | 3631 | stp->st_stid.sc_file = fp; |
1da177e4 LT |
3632 | stp->st_access_bmap = 0; |
3633 | stp->st_deny_bmap = 0; | |
4c4cd222 | 3634 | stp->st_openstp = NULL; |
1c755dc1 | 3635 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); |
1d31a253 | 3636 | list_add(&stp->st_perfile, &fp->fi_stateids); |
7fc0564e AE |
3637 | |
3638 | out_unlock: | |
1d31a253 | 3639 | spin_unlock(&fp->fi_lock); |
1c755dc1 | 3640 | spin_unlock(&oo->oo_owner.so_client->cl_lock); |
5cc1fb2a OD |
3641 | if (retstp) { |
3642 | mutex_lock(&retstp->st_mutex); | |
8c7245ab | 3643 | /* To keep mutex tracking happy */ |
5cc1fb2a | 3644 | mutex_unlock(&stp->st_mutex); |
8c7245ab | 3645 | stp = retstp; |
5cc1fb2a | 3646 | } |
8c7245ab | 3647 | return stp; |
1da177e4 LT |
3648 | } |
3649 | ||
d3134b10 JL |
3650 | /* |
3651 | * In the 4.0 case we need to keep the owners around a little while to handle | |
3652 | * CLOSE replay. We still do need to release any file access that is held by | |
3653 | * them before returning however. | |
3654 | */ | |
fd39ca9a | 3655 | static void |
d3134b10 | 3656 | move_to_close_lru(struct nfs4_ol_stateid *s, struct net *net) |
1da177e4 | 3657 | { |
217526e7 | 3658 | struct nfs4_ol_stateid *last; |
d3134b10 JL |
3659 | struct nfs4_openowner *oo = openowner(s->st_stateowner); |
3660 | struct nfsd_net *nn = net_generic(s->st_stid.sc_client->net, | |
3661 | nfsd_net_id); | |
73758fed | 3662 | |
fe0750e5 | 3663 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 3664 | |
b401be22 JL |
3665 | /* |
3666 | * We know that we hold one reference via nfsd4_close, and another | |
3667 | * "persistent" reference for the client. If the refcount is higher | |
3668 | * than 2, then there are still calls in progress that are using this | |
3669 | * stateid. We can't put the sc_file reference until they are finished. | |
3670 | * Wait for the refcount to drop to 2. Since it has been unhashed, | |
3671 | * there should be no danger of the refcount going back up again at | |
3672 | * this point. | |
3673 | */ | |
3674 | wait_event(close_wq, atomic_read(&s->st_stid.sc_count) == 2); | |
3675 | ||
d3134b10 JL |
3676 | release_all_access(s); |
3677 | if (s->st_stid.sc_file) { | |
3678 | put_nfs4_file(s->st_stid.sc_file); | |
3679 | s->st_stid.sc_file = NULL; | |
3680 | } | |
217526e7 JL |
3681 | |
3682 | spin_lock(&nn->client_lock); | |
3683 | last = oo->oo_last_closed_stid; | |
d3134b10 | 3684 | oo->oo_last_closed_stid = s; |
73758fed | 3685 | list_move_tail(&oo->oo_close_lru, &nn->close_lru); |
fe0750e5 | 3686 | oo->oo_time = get_seconds(); |
217526e7 JL |
3687 | spin_unlock(&nn->client_lock); |
3688 | if (last) | |
3689 | nfs4_put_stid(&last->st_stid); | |
1da177e4 LT |
3690 | } |
3691 | ||
1da177e4 LT |
3692 | /* search file_hashtbl[] for file */ |
3693 | static struct nfs4_file * | |
5b095e99 | 3694 | find_file_locked(struct knfsd_fh *fh, unsigned int hashval) |
1da177e4 | 3695 | { |
1da177e4 LT |
3696 | struct nfs4_file *fp; |
3697 | ||
5b095e99 | 3698 | hlist_for_each_entry_rcu(fp, &file_hashtbl[hashval], fi_hash) { |
4d94c2ef | 3699 | if (fh_match(&fp->fi_fhandle, fh)) { |
5b095e99 JL |
3700 | if (atomic_inc_not_zero(&fp->fi_ref)) |
3701 | return fp; | |
13cd2184 | 3702 | } |
1da177e4 LT |
3703 | } |
3704 | return NULL; | |
3705 | } | |
3706 | ||
e6ba76e1 | 3707 | struct nfs4_file * |
ca943217 | 3708 | find_file(struct knfsd_fh *fh) |
950e0118 TM |
3709 | { |
3710 | struct nfs4_file *fp; | |
5b095e99 | 3711 | unsigned int hashval = file_hashval(fh); |
950e0118 | 3712 | |
5b095e99 JL |
3713 | rcu_read_lock(); |
3714 | fp = find_file_locked(fh, hashval); | |
3715 | rcu_read_unlock(); | |
950e0118 TM |
3716 | return fp; |
3717 | } | |
3718 | ||
3719 | static struct nfs4_file * | |
f9c00c3a | 3720 | find_or_add_file(struct nfs4_file *new, struct knfsd_fh *fh) |
950e0118 TM |
3721 | { |
3722 | struct nfs4_file *fp; | |
5b095e99 JL |
3723 | unsigned int hashval = file_hashval(fh); |
3724 | ||
3725 | rcu_read_lock(); | |
3726 | fp = find_file_locked(fh, hashval); | |
3727 | rcu_read_unlock(); | |
3728 | if (fp) | |
3729 | return fp; | |
950e0118 TM |
3730 | |
3731 | spin_lock(&state_lock); | |
5b095e99 JL |
3732 | fp = find_file_locked(fh, hashval); |
3733 | if (likely(fp == NULL)) { | |
3734 | nfsd4_init_file(fh, hashval, new); | |
950e0118 TM |
3735 | fp = new; |
3736 | } | |
3737 | spin_unlock(&state_lock); | |
3738 | ||
3739 | return fp; | |
3740 | } | |
3741 | ||
1da177e4 LT |
3742 | /* |
3743 | * Called to check deny when READ with all zero stateid or | |
3744 | * WRITE with all zero or all one stateid | |
3745 | */ | |
b37ad28b | 3746 | static __be32 |
1da177e4 LT |
3747 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
3748 | { | |
1da177e4 | 3749 | struct nfs4_file *fp; |
baeb4ff0 | 3750 | __be32 ret = nfs_ok; |
1da177e4 | 3751 | |
ca943217 | 3752 | fp = find_file(¤t_fh->fh_handle); |
13cd2184 | 3753 | if (!fp) |
baeb4ff0 JL |
3754 | return ret; |
3755 | /* Check for conflicting share reservations */ | |
1d31a253 | 3756 | spin_lock(&fp->fi_lock); |
baeb4ff0 JL |
3757 | if (fp->fi_share_deny & deny_type) |
3758 | ret = nfserr_locked; | |
1d31a253 | 3759 | spin_unlock(&fp->fi_lock); |
13cd2184 N |
3760 | put_nfs4_file(fp); |
3761 | return ret; | |
1da177e4 LT |
3762 | } |
3763 | ||
0162ac2b | 3764 | static void nfsd4_cb_recall_prepare(struct nfsd4_callback *cb) |
1da177e4 | 3765 | { |
0162ac2b | 3766 | struct nfs4_delegation *dp = cb_to_delegation(cb); |
11b9164a TM |
3767 | struct nfsd_net *nn = net_generic(dp->dl_stid.sc_client->net, |
3768 | nfsd_net_id); | |
e8c69d17 | 3769 | |
11b9164a | 3770 | block_delegations(&dp->dl_stid.sc_file->fi_fhandle); |
f54fe962 | 3771 | |
dff1399f | 3772 | /* |
f54fe962 JL |
3773 | * We can't do this in nfsd_break_deleg_cb because it is |
3774 | * already holding inode->i_lock. | |
3775 | * | |
dff1399f JL |
3776 | * If the dl_time != 0, then we know that it has already been |
3777 | * queued for a lease break. Don't queue it again. | |
3778 | */ | |
f54fe962 | 3779 | spin_lock(&state_lock); |
dff1399f | 3780 | if (dp->dl_time == 0) { |
dff1399f | 3781 | dp->dl_time = get_seconds(); |
02e1215f | 3782 | list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru); |
dff1399f | 3783 | } |
02e1215f JL |
3784 | spin_unlock(&state_lock); |
3785 | } | |
1da177e4 | 3786 | |
0162ac2b CH |
3787 | static int nfsd4_cb_recall_done(struct nfsd4_callback *cb, |
3788 | struct rpc_task *task) | |
3789 | { | |
3790 | struct nfs4_delegation *dp = cb_to_delegation(cb); | |
3791 | ||
a457974f AE |
3792 | if (dp->dl_stid.sc_type == NFS4_CLOSED_DELEG_STID) |
3793 | return 1; | |
3794 | ||
0162ac2b CH |
3795 | switch (task->tk_status) { |
3796 | case 0: | |
3797 | return 1; | |
3798 | case -EBADHANDLE: | |
3799 | case -NFS4ERR_BAD_STATEID: | |
3800 | /* | |
3801 | * Race: client probably got cb_recall before open reply | |
3802 | * granting delegation. | |
3803 | */ | |
3804 | if (dp->dl_retries--) { | |
3805 | rpc_delay(task, 2 * HZ); | |
3806 | return 0; | |
3807 | } | |
3808 | /*FALLTHRU*/ | |
3809 | default: | |
3810 | return -1; | |
3811 | } | |
3812 | } | |
3813 | ||
3814 | static void nfsd4_cb_recall_release(struct nfsd4_callback *cb) | |
3815 | { | |
3816 | struct nfs4_delegation *dp = cb_to_delegation(cb); | |
3817 | ||
3818 | nfs4_put_stid(&dp->dl_stid); | |
3819 | } | |
3820 | ||
c4cb8974 | 3821 | static const struct nfsd4_callback_ops nfsd4_cb_recall_ops = { |
0162ac2b CH |
3822 | .prepare = nfsd4_cb_recall_prepare, |
3823 | .done = nfsd4_cb_recall_done, | |
3824 | .release = nfsd4_cb_recall_release, | |
3825 | }; | |
3826 | ||
02e1215f JL |
3827 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
3828 | { | |
3829 | /* | |
3830 | * We're assuming the state code never drops its reference | |
3831 | * without first removing the lease. Since we're in this lease | |
3832 | * callback (and since the lease code is serialized by the kernel | |
3833 | * lock) we know the server hasn't removed the lease yet, we know | |
3834 | * it's safe to take a reference. | |
3835 | */ | |
72c0b0fb | 3836 | atomic_inc(&dp->dl_stid.sc_count); |
f0b5de1b | 3837 | nfsd4_run_cb(&dp->dl_recall); |
6b57d9c8 BF |
3838 | } |
3839 | ||
1c8c601a | 3840 | /* Called from break_lease() with i_lock held. */ |
4d01b7f5 JL |
3841 | static bool |
3842 | nfsd_break_deleg_cb(struct file_lock *fl) | |
6b57d9c8 | 3843 | { |
4d01b7f5 | 3844 | bool ret = false; |
acfdf5c3 BF |
3845 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
3846 | struct nfs4_delegation *dp; | |
6b57d9c8 | 3847 | |
7fa10cd1 BF |
3848 | if (!fp) { |
3849 | WARN(1, "(%p)->fl_owner NULL\n", fl); | |
4d01b7f5 | 3850 | return ret; |
7fa10cd1 BF |
3851 | } |
3852 | if (fp->fi_had_conflict) { | |
3853 | WARN(1, "duplicate break on %p\n", fp); | |
4d01b7f5 | 3854 | return ret; |
7fa10cd1 | 3855 | } |
0272e1fd BF |
3856 | /* |
3857 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 3858 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 3859 | * in time: |
0272e1fd BF |
3860 | */ |
3861 | fl->fl_break_time = 0; | |
1da177e4 | 3862 | |
02e1215f | 3863 | spin_lock(&fp->fi_lock); |
417c6629 JL |
3864 | fp->fi_had_conflict = true; |
3865 | /* | |
4d01b7f5 JL |
3866 | * If there are no delegations on the list, then return true |
3867 | * so that the lease code will go ahead and delete it. | |
417c6629 JL |
3868 | */ |
3869 | if (list_empty(&fp->fi_delegations)) | |
4d01b7f5 | 3870 | ret = true; |
417c6629 JL |
3871 | else |
3872 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
3873 | nfsd_break_one_deleg(dp); | |
02e1215f | 3874 | spin_unlock(&fp->fi_lock); |
4d01b7f5 | 3875 | return ret; |
1da177e4 LT |
3876 | } |
3877 | ||
c45198ed | 3878 | static int |
7448cc37 JL |
3879 | nfsd_change_deleg_cb(struct file_lock *onlist, int arg, |
3880 | struct list_head *dispose) | |
1da177e4 LT |
3881 | { |
3882 | if (arg & F_UNLCK) | |
c45198ed | 3883 | return lease_modify(onlist, arg, dispose); |
1da177e4 LT |
3884 | else |
3885 | return -EAGAIN; | |
3886 | } | |
3887 | ||
7b021967 | 3888 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
3889 | .lm_break = nfsd_break_deleg_cb, |
3890 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
3891 | }; |
3892 | ||
7a8711c9 BF |
3893 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
3894 | { | |
3895 | if (nfsd4_has_session(cstate)) | |
3896 | return nfs_ok; | |
3897 | if (seqid == so->so_seqid - 1) | |
3898 | return nfserr_replay_me; | |
3899 | if (seqid == so->so_seqid) | |
3900 | return nfs_ok; | |
3901 | return nfserr_bad_seqid; | |
3902 | } | |
1da177e4 | 3903 | |
4b24ca7d JL |
3904 | static __be32 lookup_clientid(clientid_t *clid, |
3905 | struct nfsd4_compound_state *cstate, | |
3906 | struct nfsd_net *nn) | |
3907 | { | |
3908 | struct nfs4_client *found; | |
3909 | ||
3910 | if (cstate->clp) { | |
3911 | found = cstate->clp; | |
3912 | if (!same_clid(&found->cl_clientid, clid)) | |
3913 | return nfserr_stale_clientid; | |
3914 | return nfs_ok; | |
3915 | } | |
3916 | ||
3917 | if (STALE_CLIENTID(clid, nn)) | |
3918 | return nfserr_stale_clientid; | |
3919 | ||
3920 | /* | |
3921 | * For v4.1+ we get the client in the SEQUENCE op. If we don't have one | |
3922 | * cached already then we know this is for is for v4.0 and "sessions" | |
3923 | * will be false. | |
3924 | */ | |
3925 | WARN_ON_ONCE(cstate->session); | |
3e339f96 | 3926 | spin_lock(&nn->client_lock); |
4b24ca7d | 3927 | found = find_confirmed_client(clid, false, nn); |
3e339f96 TM |
3928 | if (!found) { |
3929 | spin_unlock(&nn->client_lock); | |
4b24ca7d | 3930 | return nfserr_expired; |
3e339f96 TM |
3931 | } |
3932 | atomic_inc(&found->cl_refcount); | |
3933 | spin_unlock(&nn->client_lock); | |
4b24ca7d JL |
3934 | |
3935 | /* Cache the nfs4_client in cstate! */ | |
3936 | cstate->clp = found; | |
4b24ca7d JL |
3937 | return nfs_ok; |
3938 | } | |
3939 | ||
b37ad28b | 3940 | __be32 |
6668958f | 3941 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
3320fef1 | 3942 | struct nfsd4_open *open, struct nfsd_net *nn) |
1da177e4 | 3943 | { |
1da177e4 LT |
3944 | clientid_t *clientid = &open->op_clientid; |
3945 | struct nfs4_client *clp = NULL; | |
3946 | unsigned int strhashval; | |
fe0750e5 | 3947 | struct nfs4_openowner *oo = NULL; |
4cdc951b | 3948 | __be32 status; |
1da177e4 | 3949 | |
2c142baa | 3950 | if (STALE_CLIENTID(&open->op_clientid, nn)) |
1da177e4 | 3951 | return nfserr_stale_clientid; |
32513b40 BF |
3952 | /* |
3953 | * In case we need it later, after we've already created the | |
3954 | * file and don't want to risk a further failure: | |
3955 | */ | |
3956 | open->op_file = nfsd4_alloc_file(); | |
3957 | if (open->op_file == NULL) | |
3958 | return nfserr_jukebox; | |
1da177e4 | 3959 | |
2d91e895 TM |
3960 | status = lookup_clientid(clientid, cstate, nn); |
3961 | if (status) | |
3962 | return status; | |
3963 | clp = cstate->clp; | |
3964 | ||
d4f0489f TM |
3965 | strhashval = ownerstr_hashval(&open->op_owner); |
3966 | oo = find_openstateowner_str(strhashval, open, clp); | |
fe0750e5 BF |
3967 | open->op_openowner = oo; |
3968 | if (!oo) { | |
bcf130f9 | 3969 | goto new_owner; |
1da177e4 | 3970 | } |
dad1c067 | 3971 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
0f442aa2 | 3972 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
3973 | release_openowner(oo); |
3974 | open->op_openowner = NULL; | |
bcf130f9 | 3975 | goto new_owner; |
0f442aa2 | 3976 | } |
4cdc951b BF |
3977 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
3978 | if (status) | |
3979 | return status; | |
4cdc951b | 3980 | goto alloc_stateid; |
bcf130f9 | 3981 | new_owner: |
13d6f66b | 3982 | oo = alloc_init_open_stateowner(strhashval, open, cstate); |
bcf130f9 BF |
3983 | if (oo == NULL) |
3984 | return nfserr_jukebox; | |
3985 | open->op_openowner = oo; | |
4cdc951b | 3986 | alloc_stateid: |
b49e084d | 3987 | open->op_stp = nfs4_alloc_open_stateid(clp); |
4cdc951b BF |
3988 | if (!open->op_stp) |
3989 | return nfserr_jukebox; | |
8287f009 SB |
3990 | |
3991 | if (nfsd4_has_session(cstate) && | |
3992 | (cstate->current_fh.fh_export->ex_flags & NFSEXP_PNFS)) { | |
3993 | open->op_odstate = alloc_clnt_odstate(clp); | |
3994 | if (!open->op_odstate) | |
3995 | return nfserr_jukebox; | |
3996 | } | |
3997 | ||
0f442aa2 | 3998 | return nfs_ok; |
1da177e4 LT |
3999 | } |
4000 | ||
b37ad28b | 4001 | static inline __be32 |
4a6e43e6 N |
4002 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
4003 | { | |
4004 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
4005 | return nfserr_openmode; | |
4006 | else | |
4007 | return nfs_ok; | |
4008 | } | |
4009 | ||
f459e453 | 4010 | static int share_access_to_flags(u32 share_access) |
52f4fb43 | 4011 | { |
f459e453 | 4012 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
52f4fb43 N |
4013 | } |
4014 | ||
38c2f4b1 | 4015 | static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) |
24a0111e | 4016 | { |
f459e453 | 4017 | struct nfs4_stid *ret; |
24a0111e | 4018 | |
38c2f4b1 | 4019 | ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); |
f459e453 BF |
4020 | if (!ret) |
4021 | return NULL; | |
4022 | return delegstateid(ret); | |
24a0111e BF |
4023 | } |
4024 | ||
8b289b2c BF |
4025 | static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) |
4026 | { | |
4027 | return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || | |
4028 | open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; | |
4029 | } | |
4030 | ||
b37ad28b | 4031 | static __be32 |
41d22663 | 4032 | nfs4_check_deleg(struct nfs4_client *cl, struct nfsd4_open *open, |
567d9829 N |
4033 | struct nfs4_delegation **dp) |
4034 | { | |
4035 | int flags; | |
b37ad28b | 4036 | __be32 status = nfserr_bad_stateid; |
dcd94cc2 | 4037 | struct nfs4_delegation *deleg; |
567d9829 | 4038 | |
dcd94cc2 TM |
4039 | deleg = find_deleg_stateid(cl, &open->op_delegate_stateid); |
4040 | if (deleg == NULL) | |
c44c5eeb | 4041 | goto out; |
24a0111e | 4042 | flags = share_access_to_flags(open->op_share_access); |
dcd94cc2 TM |
4043 | status = nfs4_check_delegmode(deleg, flags); |
4044 | if (status) { | |
4045 | nfs4_put_stid(&deleg->dl_stid); | |
4046 | goto out; | |
4047 | } | |
4048 | *dp = deleg; | |
c44c5eeb | 4049 | out: |
8b289b2c | 4050 | if (!nfsd4_is_deleg_cur(open)) |
c44c5eeb N |
4051 | return nfs_ok; |
4052 | if (status) | |
4053 | return status; | |
dad1c067 | 4054 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
c44c5eeb | 4055 | return nfs_ok; |
567d9829 N |
4056 | } |
4057 | ||
21fb4016 BF |
4058 | static inline int nfs4_access_to_access(u32 nfs4_access) |
4059 | { | |
4060 | int flags = 0; | |
4061 | ||
4062 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
4063 | flags |= NFSD_MAY_READ; | |
4064 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
4065 | flags |= NFSD_MAY_WRITE; | |
4066 | return flags; | |
4067 | } | |
4068 | ||
7e6a72e5 CH |
4069 | static inline __be32 |
4070 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, | |
4071 | struct nfsd4_open *open) | |
4072 | { | |
4073 | struct iattr iattr = { | |
4074 | .ia_valid = ATTR_SIZE, | |
4075 | .ia_size = 0, | |
4076 | }; | |
4077 | if (!open->op_truncate) | |
4078 | return 0; | |
4079 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
4080 | return nfserr_inval; | |
4081 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); | |
4082 | } | |
4083 | ||
0c12eaff | 4084 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
6eb3a1d0 JL |
4085 | struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp, |
4086 | struct nfsd4_open *open) | |
f9d7562f | 4087 | { |
de18643d | 4088 | struct file *filp = NULL; |
f9d7562f | 4089 | __be32 status; |
0c12eaff CB |
4090 | int oflag = nfs4_access_to_omode(open->op_share_access); |
4091 | int access = nfs4_access_to_access(open->op_share_access); | |
baeb4ff0 | 4092 | unsigned char old_access_bmap, old_deny_bmap; |
0c12eaff | 4093 | |
de18643d | 4094 | spin_lock(&fp->fi_lock); |
baeb4ff0 JL |
4095 | |
4096 | /* | |
4097 | * Are we trying to set a deny mode that would conflict with | |
4098 | * current access? | |
4099 | */ | |
4100 | status = nfs4_file_check_deny(fp, open->op_share_deny); | |
4101 | if (status != nfs_ok) { | |
4102 | spin_unlock(&fp->fi_lock); | |
4103 | goto out; | |
4104 | } | |
4105 | ||
4106 | /* set access to the file */ | |
4107 | status = nfs4_file_get_access(fp, open->op_share_access); | |
4108 | if (status != nfs_ok) { | |
4109 | spin_unlock(&fp->fi_lock); | |
4110 | goto out; | |
4111 | } | |
4112 | ||
4113 | /* Set access bits in stateid */ | |
4114 | old_access_bmap = stp->st_access_bmap; | |
4115 | set_access(open->op_share_access, stp); | |
4116 | ||
4117 | /* Set new deny mask */ | |
4118 | old_deny_bmap = stp->st_deny_bmap; | |
4119 | set_deny(open->op_share_deny, stp); | |
4120 | fp->fi_share_deny |= (open->op_share_deny & NFS4_SHARE_DENY_BOTH); | |
4121 | ||
f9d7562f | 4122 | if (!fp->fi_fds[oflag]) { |
de18643d TM |
4123 | spin_unlock(&fp->fi_lock); |
4124 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, &filp); | |
f9d7562f | 4125 | if (status) |
baeb4ff0 | 4126 | goto out_put_access; |
de18643d TM |
4127 | spin_lock(&fp->fi_lock); |
4128 | if (!fp->fi_fds[oflag]) { | |
4129 | fp->fi_fds[oflag] = filp; | |
4130 | filp = NULL; | |
4131 | } | |
f9d7562f | 4132 | } |
de18643d TM |
4133 | spin_unlock(&fp->fi_lock); |
4134 | if (filp) | |
4135 | fput(filp); | |
f9d7562f | 4136 | |
7e6a72e5 CH |
4137 | status = nfsd4_truncate(rqstp, cur_fh, open); |
4138 | if (status) | |
4139 | goto out_put_access; | |
7e6a72e5 CH |
4140 | out: |
4141 | return status; | |
baeb4ff0 JL |
4142 | out_put_access: |
4143 | stp->st_access_bmap = old_access_bmap; | |
4144 | nfs4_file_put_access(fp, open->op_share_access); | |
4145 | reset_union_bmap_deny(bmap_to_share_mode(old_deny_bmap), stp); | |
4146 | goto out; | |
1da177e4 LT |
4147 | } |
4148 | ||
b37ad28b | 4149 | static __be32 |
dcef0413 | 4150 | 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 | 4151 | { |
b37ad28b | 4152 | __be32 status; |
6ac75368 | 4153 | unsigned char old_deny_bmap = stp->st_deny_bmap; |
1da177e4 | 4154 | |
6eb3a1d0 | 4155 | if (!test_access(open->op_share_access, stp)) |
baeb4ff0 | 4156 | return nfs4_get_vfs_file(rqstp, fp, cur_fh, stp, open); |
7e6a72e5 | 4157 | |
baeb4ff0 JL |
4158 | /* test and set deny mode */ |
4159 | spin_lock(&fp->fi_lock); | |
4160 | status = nfs4_file_check_deny(fp, open->op_share_deny); | |
4161 | if (status == nfs_ok) { | |
baeb4ff0 JL |
4162 | set_deny(open->op_share_deny, stp); |
4163 | fp->fi_share_deny |= | |
4164 | (open->op_share_deny & NFS4_SHARE_DENY_BOTH); | |
4165 | } | |
4166 | spin_unlock(&fp->fi_lock); | |
4167 | ||
4168 | if (status != nfs_ok) | |
1da177e4 | 4169 | return status; |
1da177e4 | 4170 | |
baeb4ff0 JL |
4171 | status = nfsd4_truncate(rqstp, cur_fh, open); |
4172 | if (status != nfs_ok) | |
4173 | reset_union_bmap_deny(old_deny_bmap, stp); | |
4174 | return status; | |
4175 | } | |
1da177e4 | 4176 | |
14a24e99 BF |
4177 | /* Should we give out recallable state?: */ |
4178 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
4179 | { | |
4180 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
4181 | return true; | |
4182 | /* | |
4183 | * In the sessions case, since we don't have to establish a | |
4184 | * separate connection for callbacks, we assume it's OK | |
4185 | * until we hear otherwise: | |
4186 | */ | |
4187 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
4188 | } | |
4189 | ||
d564fbec | 4190 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_file *fp, int flag) |
22d38c4c BF |
4191 | { |
4192 | struct file_lock *fl; | |
4193 | ||
4194 | fl = locks_alloc_lock(); | |
4195 | if (!fl) | |
4196 | return NULL; | |
22d38c4c | 4197 | fl->fl_lmops = &nfsd_lease_mng_ops; |
617588d5 | 4198 | fl->fl_flags = FL_DELEG; |
22d38c4c BF |
4199 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; |
4200 | fl->fl_end = OFFSET_MAX; | |
d564fbec | 4201 | fl->fl_owner = (fl_owner_t)fp; |
22d38c4c | 4202 | fl->fl_pid = current->tgid; |
22d38c4c BF |
4203 | return fl; |
4204 | } | |
4205 | ||
34ed9872 AE |
4206 | /** |
4207 | * nfs4_setlease - Obtain a delegation by requesting lease from vfs layer | |
4208 | * @dp: a pointer to the nfs4_delegation we're adding. | |
4209 | * | |
4210 | * Return: | |
4211 | * On success: Return code will be 0 on success. | |
4212 | * | |
4213 | * On error: -EAGAIN if there was an existing delegation. | |
4214 | * nonzero if there is an error in other cases. | |
4215 | * | |
4216 | */ | |
4217 | ||
99c41515 | 4218 | static int nfs4_setlease(struct nfs4_delegation *dp) |
edab9782 | 4219 | { |
11b9164a | 4220 | struct nfs4_file *fp = dp->dl_stid.sc_file; |
efde6b4d | 4221 | struct file_lock *fl; |
417c6629 JL |
4222 | struct file *filp; |
4223 | int status = 0; | |
edab9782 | 4224 | |
d564fbec | 4225 | fl = nfs4_alloc_init_lease(fp, NFS4_OPEN_DELEGATE_READ); |
edab9782 BF |
4226 | if (!fl) |
4227 | return -ENOMEM; | |
417c6629 JL |
4228 | filp = find_readable_file(fp); |
4229 | if (!filp) { | |
4230 | /* We should always have a readable file here */ | |
4231 | WARN_ON_ONCE(1); | |
af9dbaf4 | 4232 | locks_free_lock(fl); |
417c6629 JL |
4233 | return -EBADF; |
4234 | } | |
4235 | fl->fl_file = filp; | |
e6f5c789 | 4236 | status = vfs_setlease(filp, fl->fl_type, &fl, NULL); |
1c7dd2ff | 4237 | if (fl) |
417c6629 | 4238 | locks_free_lock(fl); |
1c7dd2ff | 4239 | if (status) |
417c6629 | 4240 | goto out_fput; |
417c6629 JL |
4241 | spin_lock(&state_lock); |
4242 | spin_lock(&fp->fi_lock); | |
4243 | /* Did the lease get broken before we took the lock? */ | |
4244 | status = -EAGAIN; | |
4245 | if (fp->fi_had_conflict) | |
4246 | goto out_unlock; | |
4247 | /* Race breaker */ | |
0c637be8 | 4248 | if (fp->fi_deleg_file) { |
34ed9872 | 4249 | status = hash_delegation_locked(dp, fp); |
417c6629 JL |
4250 | goto out_unlock; |
4251 | } | |
417c6629 | 4252 | fp->fi_deleg_file = filp; |
34ed9872 AE |
4253 | fp->fi_delegees = 0; |
4254 | status = hash_delegation_locked(dp, fp); | |
417c6629 | 4255 | spin_unlock(&fp->fi_lock); |
cdc97505 | 4256 | spin_unlock(&state_lock); |
34ed9872 AE |
4257 | if (status) { |
4258 | /* Should never happen, this is a new fi_deleg_file */ | |
4259 | WARN_ON_ONCE(1); | |
4260 | goto out_fput; | |
4261 | } | |
acfdf5c3 | 4262 | return 0; |
417c6629 JL |
4263 | out_unlock: |
4264 | spin_unlock(&fp->fi_lock); | |
4265 | spin_unlock(&state_lock); | |
4266 | out_fput: | |
4267 | fput(filp); | |
e873088f | 4268 | return status; |
acfdf5c3 BF |
4269 | } |
4270 | ||
0b26693c JL |
4271 | static struct nfs4_delegation * |
4272 | nfs4_set_delegation(struct nfs4_client *clp, struct svc_fh *fh, | |
8287f009 | 4273 | struct nfs4_file *fp, struct nfs4_clnt_odstate *odstate) |
acfdf5c3 | 4274 | { |
0b26693c JL |
4275 | int status; |
4276 | struct nfs4_delegation *dp; | |
417c6629 | 4277 | |
bf7bd3e9 | 4278 | if (fp->fi_had_conflict) |
0b26693c JL |
4279 | return ERR_PTR(-EAGAIN); |
4280 | ||
34ed9872 AE |
4281 | spin_lock(&state_lock); |
4282 | spin_lock(&fp->fi_lock); | |
4283 | status = nfs4_get_existing_delegation(clp, fp); | |
4284 | spin_unlock(&fp->fi_lock); | |
4285 | spin_unlock(&state_lock); | |
4286 | ||
4287 | if (status) | |
4288 | return ERR_PTR(status); | |
4289 | ||
8287f009 | 4290 | dp = alloc_init_deleg(clp, fh, odstate); |
0b26693c JL |
4291 | if (!dp) |
4292 | return ERR_PTR(-ENOMEM); | |
4293 | ||
bf7bd3e9 | 4294 | get_nfs4_file(fp); |
417c6629 JL |
4295 | spin_lock(&state_lock); |
4296 | spin_lock(&fp->fi_lock); | |
11b9164a | 4297 | dp->dl_stid.sc_file = fp; |
0c637be8 | 4298 | if (!fp->fi_deleg_file) { |
417c6629 JL |
4299 | spin_unlock(&fp->fi_lock); |
4300 | spin_unlock(&state_lock); | |
0b26693c JL |
4301 | status = nfs4_setlease(dp); |
4302 | goto out; | |
417c6629 | 4303 | } |
acfdf5c3 | 4304 | if (fp->fi_had_conflict) { |
417c6629 JL |
4305 | status = -EAGAIN; |
4306 | goto out_unlock; | |
acfdf5c3 | 4307 | } |
34ed9872 | 4308 | status = hash_delegation_locked(dp, fp); |
417c6629 JL |
4309 | out_unlock: |
4310 | spin_unlock(&fp->fi_lock); | |
cdc97505 | 4311 | spin_unlock(&state_lock); |
0b26693c JL |
4312 | out: |
4313 | if (status) { | |
8287f009 | 4314 | put_clnt_odstate(dp->dl_clnt_odstate); |
6011695d | 4315 | nfs4_put_stid(&dp->dl_stid); |
0b26693c JL |
4316 | return ERR_PTR(status); |
4317 | } | |
4318 | return dp; | |
edab9782 BF |
4319 | } |
4320 | ||
4aa8913c BH |
4321 | static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) |
4322 | { | |
4323 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
4324 | if (status == -EAGAIN) | |
4325 | open->op_why_no_deleg = WND4_CONTENTION; | |
4326 | else { | |
4327 | open->op_why_no_deleg = WND4_RESOURCE; | |
4328 | switch (open->op_deleg_want) { | |
4329 | case NFS4_SHARE_WANT_READ_DELEG: | |
4330 | case NFS4_SHARE_WANT_WRITE_DELEG: | |
4331 | case NFS4_SHARE_WANT_ANY_DELEG: | |
4332 | break; | |
4333 | case NFS4_SHARE_WANT_CANCEL: | |
4334 | open->op_why_no_deleg = WND4_CANCELLED; | |
4335 | break; | |
4336 | case NFS4_SHARE_WANT_NO_DELEG: | |
063b0fb9 | 4337 | WARN_ON_ONCE(1); |
4aa8913c BH |
4338 | } |
4339 | } | |
4340 | } | |
4341 | ||
1da177e4 LT |
4342 | /* |
4343 | * Attempt to hand out a delegation. | |
99c41515 BF |
4344 | * |
4345 | * Note we don't support write delegations, and won't until the vfs has | |
4346 | * proper support for them. | |
1da177e4 LT |
4347 | */ |
4348 | static void | |
4cf59221 JL |
4349 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, |
4350 | struct nfs4_ol_stateid *stp) | |
1da177e4 LT |
4351 | { |
4352 | struct nfs4_delegation *dp; | |
4cf59221 JL |
4353 | struct nfs4_openowner *oo = openowner(stp->st_stateowner); |
4354 | struct nfs4_client *clp = stp->st_stid.sc_client; | |
14a24e99 | 4355 | int cb_up; |
99c41515 | 4356 | int status = 0; |
1da177e4 | 4357 | |
fe0750e5 | 4358 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
7b190fec N |
4359 | open->op_recall = 0; |
4360 | switch (open->op_claim_type) { | |
4361 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 4362 | if (!cb_up) |
7b190fec | 4363 | open->op_recall = 1; |
99c41515 BF |
4364 | if (open->op_delegate_type != NFS4_OPEN_DELEGATE_READ) |
4365 | goto out_no_deleg; | |
7b190fec N |
4366 | break; |
4367 | case NFS4_OPEN_CLAIM_NULL: | |
ed47b062 | 4368 | case NFS4_OPEN_CLAIM_FH: |
99c41515 BF |
4369 | /* |
4370 | * Let's not give out any delegations till everyone's | |
c87fb4a3 BF |
4371 | * had the chance to reclaim theirs, *and* until |
4372 | * NLM locks have all been reclaimed: | |
99c41515 | 4373 | */ |
4cf59221 | 4374 | if (locks_in_grace(clp->net)) |
99c41515 | 4375 | goto out_no_deleg; |
dad1c067 | 4376 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
99c41515 | 4377 | goto out_no_deleg; |
9a0590ae SD |
4378 | /* |
4379 | * Also, if the file was opened for write or | |
4380 | * create, there's a good chance the client's | |
4381 | * about to write to it, resulting in an | |
4382 | * immediate recall (since we don't support | |
4383 | * write delegations): | |
4384 | */ | |
7b190fec | 4385 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
99c41515 BF |
4386 | goto out_no_deleg; |
4387 | if (open->op_create == NFS4_OPEN_CREATE) | |
4388 | goto out_no_deleg; | |
7b190fec N |
4389 | break; |
4390 | default: | |
99c41515 | 4391 | goto out_no_deleg; |
7b190fec | 4392 | } |
8287f009 | 4393 | dp = nfs4_set_delegation(clp, fh, stp->st_stid.sc_file, stp->st_clnt_odstate); |
0b26693c | 4394 | if (IS_ERR(dp)) |
dd239cc0 | 4395 | goto out_no_deleg; |
1da177e4 | 4396 | |
d5477a8d | 4397 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 4398 | |
8c10cbdb | 4399 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
d5477a8d | 4400 | STATEID_VAL(&dp->dl_stid.sc_stateid)); |
99c41515 | 4401 | open->op_delegate_type = NFS4_OPEN_DELEGATE_READ; |
67cb1279 | 4402 | nfs4_put_stid(&dp->dl_stid); |
dd239cc0 | 4403 | return; |
dd239cc0 | 4404 | out_no_deleg: |
99c41515 BF |
4405 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE; |
4406 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && | |
d08d32e6 | 4407 | open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) { |
99c41515 | 4408 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
d08d32e6 BF |
4409 | open->op_recall = 1; |
4410 | } | |
99c41515 BF |
4411 | |
4412 | /* 4.1 client asking for a delegation? */ | |
4413 | if (open->op_deleg_want) | |
4414 | nfsd4_open_deleg_none_ext(open, status); | |
4415 | return; | |
1da177e4 LT |
4416 | } |
4417 | ||
e27f49c3 BH |
4418 | static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, |
4419 | struct nfs4_delegation *dp) | |
4420 | { | |
4421 | if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && | |
4422 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
4423 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
4424 | open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; | |
4425 | } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && | |
4426 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
4427 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
4428 | open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; | |
4429 | } | |
4430 | /* Otherwise the client must be confused wanting a delegation | |
4431 | * it already has, therefore we don't return | |
4432 | * NFS4_OPEN_DELEGATE_NONE_EXT and reason. | |
4433 | */ | |
4434 | } | |
4435 | ||
b37ad28b | 4436 | __be32 |
1da177e4 LT |
4437 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
4438 | { | |
6668958f | 4439 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
38c2f4b1 | 4440 | struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; |
1da177e4 | 4441 | struct nfs4_file *fp = NULL; |
dcef0413 | 4442 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 4443 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 4444 | __be32 status; |
1da177e4 | 4445 | |
1da177e4 LT |
4446 | /* |
4447 | * Lookup file; if found, lookup stateid and check open request, | |
4448 | * and check for delegations in the process of being recalled. | |
4449 | * If not found, create the nfs4_file struct | |
4450 | */ | |
f9c00c3a | 4451 | fp = find_or_add_file(open->op_file, ¤t_fh->fh_handle); |
950e0118 | 4452 | if (fp != open->op_file) { |
41d22663 | 4453 | status = nfs4_check_deleg(cl, open, &dp); |
c44c5eeb N |
4454 | if (status) |
4455 | goto out; | |
7fc0564e | 4456 | spin_lock(&fp->fi_lock); |
a46cb7f2 | 4457 | stp = nfsd4_find_existing_open(fp, open); |
7fc0564e | 4458 | spin_unlock(&fp->fi_lock); |
1da177e4 | 4459 | } else { |
950e0118 | 4460 | open->op_file = NULL; |
c44c5eeb | 4461 | status = nfserr_bad_stateid; |
8b289b2c | 4462 | if (nfsd4_is_deleg_cur(open)) |
c44c5eeb | 4463 | goto out; |
1da177e4 LT |
4464 | } |
4465 | ||
4466 | /* | |
4467 | * OPEN the file, or upgrade an existing OPEN. | |
4468 | * If truncate fails, the OPEN fails. | |
4469 | */ | |
4470 | if (stp) { | |
4471 | /* Stateid was found, this is an OPEN upgrade */ | |
feb9dad5 | 4472 | mutex_lock(&stp->st_mutex); |
f9d7562f | 4473 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
35a92fe8 | 4474 | if (status) { |
feb9dad5 | 4475 | mutex_unlock(&stp->st_mutex); |
1da177e4 | 4476 | goto out; |
35a92fe8 | 4477 | } |
1da177e4 | 4478 | } else { |
8c7245ab OD |
4479 | /* stp is returned locked. */ |
4480 | stp = init_open_stateid(fp, open); | |
4481 | /* See if we lost the race to some other thread */ | |
4482 | if (stp->st_access_bmap != 0) { | |
7fc0564e AE |
4483 | status = nfs4_upgrade_open(rqstp, fp, current_fh, |
4484 | stp, open); | |
4485 | if (status) { | |
feb9dad5 | 4486 | mutex_unlock(&stp->st_mutex); |
7fc0564e AE |
4487 | goto out; |
4488 | } | |
4489 | goto upgrade_out; | |
4490 | } | |
6eb3a1d0 JL |
4491 | status = nfs4_get_vfs_file(rqstp, fp, current_fh, stp, open); |
4492 | if (status) { | |
feb9dad5 | 4493 | mutex_unlock(&stp->st_mutex); |
6eb3a1d0 JL |
4494 | release_open_stateid(stp); |
4495 | goto out; | |
4496 | } | |
8287f009 SB |
4497 | |
4498 | stp->st_clnt_odstate = find_or_hash_clnt_odstate(fp, | |
4499 | open->op_odstate); | |
4500 | if (stp->st_clnt_odstate == open->op_odstate) | |
4501 | open->op_odstate = NULL; | |
1da177e4 | 4502 | } |
7fc0564e | 4503 | upgrade_out: |
9767feb2 | 4504 | nfs4_inc_and_copy_stateid(&open->op_stateid, &stp->st_stid); |
feb9dad5 | 4505 | mutex_unlock(&stp->st_mutex); |
1da177e4 | 4506 | |
d24433cd | 4507 | if (nfsd4_has_session(&resp->cstate)) { |
d24433cd BH |
4508 | if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { |
4509 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
4510 | open->op_why_no_deleg = WND4_NOT_WANTED; | |
4511 | goto nodeleg; | |
4512 | } | |
4513 | } | |
4514 | ||
1da177e4 LT |
4515 | /* |
4516 | * Attempt to hand out a delegation. No error return, because the | |
4517 | * OPEN succeeds even if we fail. | |
4518 | */ | |
4cf59221 | 4519 | nfs4_open_delegation(current_fh, open, stp); |
d24433cd | 4520 | nodeleg: |
1da177e4 LT |
4521 | status = nfs_ok; |
4522 | ||
8c10cbdb | 4523 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
dcef0413 | 4524 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
1da177e4 | 4525 | out: |
d24433cd BH |
4526 | /* 4.1 client trying to upgrade/downgrade delegation? */ |
4527 | if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && | |
e27f49c3 BH |
4528 | open->op_deleg_want) |
4529 | nfsd4_deleg_xgrade_none_ext(open, dp); | |
d24433cd | 4530 | |
13cd2184 N |
4531 | if (fp) |
4532 | put_nfs4_file(fp); | |
37515177 | 4533 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
87186022 | 4534 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
1da177e4 LT |
4535 | /* |
4536 | * To finish the open response, we just need to set the rflags. | |
4537 | */ | |
4538 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
19e4c347 JL |
4539 | if (nfsd4_has_session(&resp->cstate)) |
4540 | open->op_rflags |= NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK; | |
4541 | else if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED)) | |
1da177e4 | 4542 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
19e4c347 | 4543 | |
dcd94cc2 TM |
4544 | if (dp) |
4545 | nfs4_put_stid(&dp->dl_stid); | |
d6f2bc5d TM |
4546 | if (stp) |
4547 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 LT |
4548 | |
4549 | return status; | |
4550 | } | |
4551 | ||
58fb12e6 | 4552 | void nfsd4_cleanup_open_state(struct nfsd4_compound_state *cstate, |
42297899 | 4553 | struct nfsd4_open *open) |
d29b20cd BF |
4554 | { |
4555 | if (open->op_openowner) { | |
d3134b10 JL |
4556 | struct nfs4_stateowner *so = &open->op_openowner->oo_owner; |
4557 | ||
4558 | nfsd4_cstate_assign_replay(cstate, so); | |
4559 | nfs4_put_stateowner(so); | |
d29b20cd | 4560 | } |
32513b40 | 4561 | if (open->op_file) |
5b095e99 | 4562 | kmem_cache_free(file_slab, open->op_file); |
4cdc951b | 4563 | if (open->op_stp) |
6011695d | 4564 | nfs4_put_stid(&open->op_stp->st_stid); |
8287f009 SB |
4565 | if (open->op_odstate) |
4566 | kmem_cache_free(odstate_slab, open->op_odstate); | |
d29b20cd BF |
4567 | } |
4568 | ||
b37ad28b | 4569 | __be32 |
b591480b | 4570 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 4571 | union nfsd4_op_u *u) |
1da177e4 | 4572 | { |
eb69853d | 4573 | clientid_t *clid = &u->renew; |
1da177e4 | 4574 | struct nfs4_client *clp; |
b37ad28b | 4575 | __be32 status; |
7f2210fa | 4576 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4577 | |
1da177e4 LT |
4578 | dprintk("process_renew(%08x/%08x): starting\n", |
4579 | clid->cl_boot, clid->cl_id); | |
4b24ca7d | 4580 | status = lookup_clientid(clid, cstate, nn); |
9b2ef62b | 4581 | if (status) |
1da177e4 | 4582 | goto out; |
4b24ca7d | 4583 | clp = cstate->clp; |
1da177e4 | 4584 | status = nfserr_cb_path_down; |
ea1da636 | 4585 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 4586 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
4587 | goto out; |
4588 | status = nfs_ok; | |
4589 | out: | |
1da177e4 LT |
4590 | return status; |
4591 | } | |
4592 | ||
7f5ef2e9 | 4593 | void |
12760c66 | 4594 | nfsd4_end_grace(struct nfsd_net *nn) |
a76b4319 | 4595 | { |
33dcc481 | 4596 | /* do nothing if grace period already ended */ |
a51c84ed | 4597 | if (nn->grace_ended) |
33dcc481 JL |
4598 | return; |
4599 | ||
a76b4319 | 4600 | dprintk("NFSD: end of grace period\n"); |
a51c84ed | 4601 | nn->grace_ended = true; |
70b28235 BF |
4602 | /* |
4603 | * If the server goes down again right now, an NFSv4 | |
4604 | * client will still be allowed to reclaim after it comes back up, | |
4605 | * even if it hasn't yet had a chance to reclaim state this time. | |
4606 | * | |
4607 | */ | |
919b8049 | 4608 | nfsd4_record_grace_done(nn); |
70b28235 BF |
4609 | /* |
4610 | * At this point, NFSv4 clients can still reclaim. But if the | |
4611 | * server crashes, any that have not yet reclaimed will be out | |
4612 | * of luck on the next boot. | |
4613 | * | |
4614 | * (NFSv4.1+ clients are considered to have reclaimed once they | |
4615 | * call RECLAIM_COMPLETE. NFSv4.0 clients are considered to | |
4616 | * have reclaimed after their first OPEN.) | |
4617 | */ | |
5e1533c7 | 4618 | locks_end_grace(&nn->nfsd4_manager); |
70b28235 BF |
4619 | /* |
4620 | * At this point, and once lockd and/or any other containers | |
4621 | * exit their grace period, further reclaims will fail and | |
4622 | * regular locking can resume. | |
4623 | */ | |
a76b4319 N |
4624 | } |
4625 | ||
fd39ca9a | 4626 | static time_t |
09121281 | 4627 | nfs4_laundromat(struct nfsd_net *nn) |
1da177e4 LT |
4628 | { |
4629 | struct nfs4_client *clp; | |
fe0750e5 | 4630 | struct nfs4_openowner *oo; |
1da177e4 | 4631 | struct nfs4_delegation *dp; |
217526e7 | 4632 | struct nfs4_ol_stateid *stp; |
7919d0a2 | 4633 | struct nfsd4_blocked_lock *nbl; |
1da177e4 | 4634 | struct list_head *pos, *next, reaplist; |
3d733711 | 4635 | time_t cutoff = get_seconds() - nn->nfsd4_lease; |
a832e7ae | 4636 | time_t t, new_timeo = nn->nfsd4_lease; |
1da177e4 | 4637 | |
1da177e4 | 4638 | dprintk("NFSD: laundromat service - starting\n"); |
12760c66 | 4639 | nfsd4_end_grace(nn); |
36acb66b | 4640 | INIT_LIST_HEAD(&reaplist); |
c9a49628 | 4641 | spin_lock(&nn->client_lock); |
5ed58bb2 | 4642 | list_for_each_safe(pos, next, &nn->client_lru) { |
1da177e4 LT |
4643 | clp = list_entry(pos, struct nfs4_client, cl_lru); |
4644 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
4645 | t = clp->cl_time - cutoff; | |
a832e7ae | 4646 | new_timeo = min(new_timeo, t); |
1da177e4 LT |
4647 | break; |
4648 | } | |
221a6876 | 4649 | if (mark_client_expired_locked(clp)) { |
d7682988 BH |
4650 | dprintk("NFSD: client in use (clientid %08x)\n", |
4651 | clp->cl_clientid.cl_id); | |
4652 | continue; | |
4653 | } | |
4864af97 | 4654 | list_add(&clp->cl_lru, &reaplist); |
36acb66b | 4655 | } |
c9a49628 | 4656 | spin_unlock(&nn->client_lock); |
36acb66b BH |
4657 | list_for_each_safe(pos, next, &reaplist) { |
4658 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
4659 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
4660 | clp->cl_clientid.cl_id); | |
4864af97 | 4661 | list_del_init(&clp->cl_lru); |
1da177e4 LT |
4662 | expire_client(clp); |
4663 | } | |
cdc97505 | 4664 | spin_lock(&state_lock); |
e8c69d17 | 4665 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 LT |
4666 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
4667 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
a832e7ae JL |
4668 | t = dp->dl_time - cutoff; |
4669 | new_timeo = min(new_timeo, t); | |
1da177e4 LT |
4670 | break; |
4671 | } | |
3fcbbd24 | 4672 | WARN_ON(!unhash_delegation_locked(dp)); |
42690676 | 4673 | list_add(&dp->dl_recall_lru, &reaplist); |
1da177e4 | 4674 | } |
cdc97505 | 4675 | spin_unlock(&state_lock); |
2d4a532d JL |
4676 | while (!list_empty(&reaplist)) { |
4677 | dp = list_first_entry(&reaplist, struct nfs4_delegation, | |
4678 | dl_recall_lru); | |
4679 | list_del_init(&dp->dl_recall_lru); | |
3bd64a5b | 4680 | revoke_delegation(dp); |
1da177e4 | 4681 | } |
217526e7 JL |
4682 | |
4683 | spin_lock(&nn->client_lock); | |
4684 | while (!list_empty(&nn->close_lru)) { | |
4685 | oo = list_first_entry(&nn->close_lru, struct nfs4_openowner, | |
4686 | oo_close_lru); | |
4687 | if (time_after((unsigned long)oo->oo_time, | |
4688 | (unsigned long)cutoff)) { | |
a832e7ae JL |
4689 | t = oo->oo_time - cutoff; |
4690 | new_timeo = min(new_timeo, t); | |
1da177e4 LT |
4691 | break; |
4692 | } | |
217526e7 JL |
4693 | list_del_init(&oo->oo_close_lru); |
4694 | stp = oo->oo_last_closed_stid; | |
4695 | oo->oo_last_closed_stid = NULL; | |
4696 | spin_unlock(&nn->client_lock); | |
4697 | nfs4_put_stid(&stp->st_stid); | |
4698 | spin_lock(&nn->client_lock); | |
1da177e4 | 4699 | } |
217526e7 JL |
4700 | spin_unlock(&nn->client_lock); |
4701 | ||
7919d0a2 JL |
4702 | /* |
4703 | * It's possible for a client to try and acquire an already held lock | |
4704 | * that is being held for a long time, and then lose interest in it. | |
4705 | * So, we clean out any un-revisited request after a lease period | |
4706 | * under the assumption that the client is no longer interested. | |
4707 | * | |
4708 | * RFC5661, sec. 9.6 states that the client must not rely on getting | |
4709 | * notifications and must continue to poll for locks, even when the | |
4710 | * server supports them. Thus this shouldn't lead to clients blocking | |
4711 | * indefinitely once the lock does become free. | |
4712 | */ | |
4713 | BUG_ON(!list_empty(&reaplist)); | |
0cc11a61 | 4714 | spin_lock(&nn->blocked_locks_lock); |
7919d0a2 JL |
4715 | while (!list_empty(&nn->blocked_locks_lru)) { |
4716 | nbl = list_first_entry(&nn->blocked_locks_lru, | |
4717 | struct nfsd4_blocked_lock, nbl_lru); | |
4718 | if (time_after((unsigned long)nbl->nbl_time, | |
4719 | (unsigned long)cutoff)) { | |
4720 | t = nbl->nbl_time - cutoff; | |
4721 | new_timeo = min(new_timeo, t); | |
4722 | break; | |
4723 | } | |
4724 | list_move(&nbl->nbl_lru, &reaplist); | |
4725 | list_del_init(&nbl->nbl_list); | |
4726 | } | |
0cc11a61 | 4727 | spin_unlock(&nn->blocked_locks_lock); |
7919d0a2 JL |
4728 | |
4729 | while (!list_empty(&reaplist)) { | |
4730 | nbl = list_first_entry(&nn->blocked_locks_lru, | |
4731 | struct nfsd4_blocked_lock, nbl_lru); | |
4732 | list_del_init(&nbl->nbl_lru); | |
4733 | posix_unblock_lock(&nbl->nbl_lock); | |
4734 | free_blocked_lock(nbl); | |
4735 | } | |
4736 | ||
a832e7ae | 4737 | new_timeo = max_t(time_t, new_timeo, NFSD_LAUNDROMAT_MINTIMEOUT); |
a832e7ae | 4738 | return new_timeo; |
1da177e4 LT |
4739 | } |
4740 | ||
a254b246 HH |
4741 | static struct workqueue_struct *laundry_wq; |
4742 | static void laundromat_main(struct work_struct *); | |
a254b246 HH |
4743 | |
4744 | static void | |
09121281 | 4745 | laundromat_main(struct work_struct *laundry) |
1da177e4 LT |
4746 | { |
4747 | time_t t; | |
2e55f3ab | 4748 | struct delayed_work *dwork = to_delayed_work(laundry); |
09121281 SK |
4749 | struct nfsd_net *nn = container_of(dwork, struct nfsd_net, |
4750 | laundromat_work); | |
1da177e4 | 4751 | |
09121281 | 4752 | t = nfs4_laundromat(nn); |
1da177e4 | 4753 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); |
09121281 | 4754 | queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ); |
1da177e4 LT |
4755 | } |
4756 | ||
8fcd461d | 4757 | static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stid *stp) |
1da177e4 | 4758 | { |
8fcd461d | 4759 | if (!fh_match(&fhp->fh_handle, &stp->sc_file->fi_fhandle)) |
f7a4d872 BF |
4760 | return nfserr_bad_stateid; |
4761 | return nfs_ok; | |
1da177e4 LT |
4762 | } |
4763 | ||
1da177e4 | 4764 | static inline int |
82c5ff1b | 4765 | access_permit_read(struct nfs4_ol_stateid *stp) |
1da177e4 | 4766 | { |
82c5ff1b JL |
4767 | return test_access(NFS4_SHARE_ACCESS_READ, stp) || |
4768 | test_access(NFS4_SHARE_ACCESS_BOTH, stp) || | |
4769 | test_access(NFS4_SHARE_ACCESS_WRITE, stp); | |
1da177e4 LT |
4770 | } |
4771 | ||
4772 | static inline int | |
82c5ff1b | 4773 | access_permit_write(struct nfs4_ol_stateid *stp) |
1da177e4 | 4774 | { |
82c5ff1b JL |
4775 | return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || |
4776 | test_access(NFS4_SHARE_ACCESS_BOTH, stp); | |
1da177e4 LT |
4777 | } |
4778 | ||
4779 | static | |
dcef0413 | 4780 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
1da177e4 | 4781 | { |
b37ad28b | 4782 | __be32 status = nfserr_openmode; |
1da177e4 | 4783 | |
02921914 BF |
4784 | /* For lock stateid's, we test the parent open, not the lock: */ |
4785 | if (stp->st_openstp) | |
4786 | stp = stp->st_openstp; | |
82c5ff1b | 4787 | if ((flags & WR_STATE) && !access_permit_write(stp)) |
1da177e4 | 4788 | goto out; |
82c5ff1b | 4789 | if ((flags & RD_STATE) && !access_permit_read(stp)) |
1da177e4 LT |
4790 | goto out; |
4791 | status = nfs_ok; | |
4792 | out: | |
4793 | return status; | |
4794 | } | |
4795 | ||
b37ad28b | 4796 | static inline __be32 |
5ccb0066 | 4797 | check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags) |
1da177e4 | 4798 | { |
203a8c8e | 4799 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 4800 | return nfs_ok; |
c87fb4a3 | 4801 | else if (opens_in_grace(net)) { |
25985edc | 4802 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
4803 | * conflicting state; so we must wait out the grace period. */ |
4804 | return nfserr_grace; | |
4805 | } else if (flags & WR_STATE) | |
4806 | return nfs4_share_conflict(current_fh, | |
4807 | NFS4_SHARE_DENY_WRITE); | |
4808 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
4809 | return nfs4_share_conflict(current_fh, | |
4810 | NFS4_SHARE_DENY_READ); | |
4811 | } | |
4812 | ||
4813 | /* | |
4814 | * Allow READ/WRITE during grace period on recovered state only for files | |
4815 | * that are not able to provide mandatory locking. | |
4816 | */ | |
4817 | static inline int | |
5ccb0066 | 4818 | grace_disallows_io(struct net *net, struct inode *inode) |
1da177e4 | 4819 | { |
c87fb4a3 | 4820 | return opens_in_grace(net) && mandatory_lock(inode); |
1da177e4 LT |
4821 | } |
4822 | ||
57b7b43b | 4823 | static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 4824 | { |
6668958f AA |
4825 | /* |
4826 | * When sessions are used the stateid generation number is ignored | |
4827 | * when it is zero. | |
4828 | */ | |
28dde241 | 4829 | if (has_session && in->si_generation == 0) |
81b82965 BF |
4830 | return nfs_ok; |
4831 | ||
4832 | if (in->si_generation == ref->si_generation) | |
4833 | return nfs_ok; | |
6668958f | 4834 | |
0836f587 | 4835 | /* If the client sends us a stateid from the future, it's buggy: */ |
14b7f4a1 | 4836 | if (nfsd4_stateid_generation_after(in, ref)) |
0836f587 BF |
4837 | return nfserr_bad_stateid; |
4838 | /* | |
81b82965 BF |
4839 | * However, we could see a stateid from the past, even from a |
4840 | * non-buggy client. For example, if the client sends a lock | |
4841 | * while some IO is outstanding, the lock may bump si_generation | |
4842 | * while the IO is still in flight. The client could avoid that | |
4843 | * situation by waiting for responses on all the IO requests, | |
4844 | * but better performance may result in retrying IO that | |
4845 | * receives an old_stateid error if requests are rarely | |
4846 | * reordered in flight: | |
0836f587 | 4847 | */ |
81b82965 | 4848 | return nfserr_old_stateid; |
0836f587 BF |
4849 | } |
4850 | ||
ebe9cb3b CH |
4851 | static __be32 nfsd4_check_openowner_confirmed(struct nfs4_ol_stateid *ols) |
4852 | { | |
4853 | if (ols->st_stateowner->so_is_open_owner && | |
4854 | !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) | |
4855 | return nfserr_bad_stateid; | |
4856 | return nfs_ok; | |
4857 | } | |
4858 | ||
7df302f7 | 4859 | static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) |
17456804 | 4860 | { |
97b7e3b6 | 4861 | struct nfs4_stid *s; |
1af71cc8 | 4862 | __be32 status = nfserr_bad_stateid; |
17456804 | 4863 | |
7df302f7 | 4864 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
1af71cc8 | 4865 | return status; |
7df302f7 CL |
4866 | /* Client debugging aid. */ |
4867 | if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) { | |
4868 | char addr_str[INET6_ADDRSTRLEN]; | |
4869 | rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str, | |
4870 | sizeof(addr_str)); | |
4871 | pr_warn_ratelimited("NFSD: client %s testing state ID " | |
4872 | "with incorrect client ID\n", addr_str); | |
1af71cc8 | 4873 | return status; |
7df302f7 | 4874 | } |
1af71cc8 JL |
4875 | spin_lock(&cl->cl_lock); |
4876 | s = find_stateid_locked(cl, stateid); | |
97b7e3b6 | 4877 | if (!s) |
1af71cc8 | 4878 | goto out_unlock; |
36279ac1 | 4879 | status = check_stateid_generation(stateid, &s->sc_stateid, 1); |
17456804 | 4880 | if (status) |
1af71cc8 | 4881 | goto out_unlock; |
23340032 BF |
4882 | switch (s->sc_type) { |
4883 | case NFS4_DELEG_STID: | |
1af71cc8 JL |
4884 | status = nfs_ok; |
4885 | break; | |
3bd64a5b | 4886 | case NFS4_REVOKED_DELEG_STID: |
1af71cc8 JL |
4887 | status = nfserr_deleg_revoked; |
4888 | break; | |
23340032 BF |
4889 | case NFS4_OPEN_STID: |
4890 | case NFS4_LOCK_STID: | |
ebe9cb3b | 4891 | status = nfsd4_check_openowner_confirmed(openlockstateid(s)); |
1af71cc8 | 4892 | break; |
23340032 BF |
4893 | default: |
4894 | printk("unknown stateid type %x\n", s->sc_type); | |
b0fc29d6 | 4895 | /* Fallthrough */ |
23340032 | 4896 | case NFS4_CLOSED_STID: |
b0fc29d6 | 4897 | case NFS4_CLOSED_DELEG_STID: |
1af71cc8 | 4898 | status = nfserr_bad_stateid; |
23340032 | 4899 | } |
1af71cc8 JL |
4900 | out_unlock: |
4901 | spin_unlock(&cl->cl_lock); | |
4902 | return status; | |
17456804 BS |
4903 | } |
4904 | ||
cd61c522 | 4905 | __be32 |
2dd6e458 TM |
4906 | nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate, |
4907 | stateid_t *stateid, unsigned char typemask, | |
4908 | struct nfs4_stid **s, struct nfsd_net *nn) | |
38c2f4b1 | 4909 | { |
0eb6f20a | 4910 | __be32 status; |
38c2f4b1 BF |
4911 | |
4912 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
4913 | return nfserr_bad_stateid; | |
4b24ca7d | 4914 | status = lookup_clientid(&stateid->si_opaque.so_clid, cstate, nn); |
a8a7c677 | 4915 | if (status == nfserr_stale_clientid) { |
4b24ca7d | 4916 | if (cstate->session) |
a8a7c677 | 4917 | return nfserr_bad_stateid; |
38c2f4b1 | 4918 | return nfserr_stale_stateid; |
a8a7c677 | 4919 | } |
0eb6f20a BF |
4920 | if (status) |
4921 | return status; | |
4b24ca7d | 4922 | *s = find_stateid_by_type(cstate->clp, stateid, typemask); |
38c2f4b1 BF |
4923 | if (!*s) |
4924 | return nfserr_bad_stateid; | |
4925 | return nfs_ok; | |
38c2f4b1 BF |
4926 | } |
4927 | ||
a0649b2d CH |
4928 | static struct file * |
4929 | nfs4_find_file(struct nfs4_stid *s, int flags) | |
4930 | { | |
af90f707 CH |
4931 | if (!s) |
4932 | return NULL; | |
4933 | ||
a0649b2d CH |
4934 | switch (s->sc_type) { |
4935 | case NFS4_DELEG_STID: | |
4936 | if (WARN_ON_ONCE(!s->sc_file->fi_deleg_file)) | |
4937 | return NULL; | |
4938 | return get_file(s->sc_file->fi_deleg_file); | |
4939 | case NFS4_OPEN_STID: | |
4940 | case NFS4_LOCK_STID: | |
4941 | if (flags & RD_STATE) | |
4942 | return find_readable_file(s->sc_file); | |
4943 | else | |
4944 | return find_writeable_file(s->sc_file); | |
4945 | break; | |
4946 | } | |
4947 | ||
4948 | return NULL; | |
4949 | } | |
4950 | ||
4951 | static __be32 | |
4952 | nfs4_check_olstateid(struct svc_fh *fhp, struct nfs4_ol_stateid *ols, int flags) | |
4953 | { | |
4954 | __be32 status; | |
4955 | ||
a0649b2d CH |
4956 | status = nfsd4_check_openowner_confirmed(ols); |
4957 | if (status) | |
4958 | return status; | |
4959 | return nfs4_check_openmode(ols, flags); | |
4960 | } | |
4961 | ||
af90f707 CH |
4962 | static __be32 |
4963 | nfs4_check_file(struct svc_rqst *rqstp, struct svc_fh *fhp, struct nfs4_stid *s, | |
4964 | struct file **filpp, bool *tmp_file, int flags) | |
4965 | { | |
4966 | int acc = (flags & RD_STATE) ? NFSD_MAY_READ : NFSD_MAY_WRITE; | |
4967 | struct file *file; | |
4968 | __be32 status; | |
4969 | ||
4970 | file = nfs4_find_file(s, flags); | |
4971 | if (file) { | |
4972 | status = nfsd_permission(rqstp, fhp->fh_export, fhp->fh_dentry, | |
4973 | acc | NFSD_MAY_OWNER_OVERRIDE); | |
4974 | if (status) { | |
4975 | fput(file); | |
4976 | return status; | |
4977 | } | |
4978 | ||
4979 | *filpp = file; | |
4980 | } else { | |
4981 | status = nfsd_open(rqstp, fhp, S_IFREG, acc, filpp); | |
4982 | if (status) | |
4983 | return status; | |
4984 | ||
4985 | if (tmp_file) | |
4986 | *tmp_file = true; | |
4987 | } | |
4988 | ||
4989 | return 0; | |
4990 | } | |
4991 | ||
1da177e4 | 4992 | /* |
a0649b2d CH |
4993 | * Checks for stateid operations |
4994 | */ | |
b37ad28b | 4995 | __be32 |
af90f707 | 4996 | nfs4_preprocess_stateid_op(struct svc_rqst *rqstp, |
aa0d6aed AS |
4997 | struct nfsd4_compound_state *cstate, struct svc_fh *fhp, |
4998 | stateid_t *stateid, int flags, struct file **filpp, bool *tmp_file) | |
1da177e4 | 4999 | { |
a0649b2d | 5000 | struct inode *ino = d_inode(fhp->fh_dentry); |
af90f707 | 5001 | struct net *net = SVC_NET(rqstp); |
3320fef1 | 5002 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
af90f707 | 5003 | struct nfs4_stid *s = NULL; |
b37ad28b | 5004 | __be32 status; |
1da177e4 | 5005 | |
1da177e4 LT |
5006 | if (filpp) |
5007 | *filpp = NULL; | |
af90f707 CH |
5008 | if (tmp_file) |
5009 | *tmp_file = false; | |
1da177e4 | 5010 | |
5ccb0066 | 5011 | if (grace_disallows_io(net, ino)) |
1da177e4 LT |
5012 | return nfserr_grace; |
5013 | ||
af90f707 CH |
5014 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { |
5015 | status = check_special_stateids(net, fhp, stateid, flags); | |
5016 | goto done; | |
5017 | } | |
1da177e4 | 5018 | |
2dd6e458 | 5019 | status = nfsd4_lookup_stateid(cstate, stateid, |
db24b3b4 | 5020 | NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, |
2dd6e458 | 5021 | &s, nn); |
38c2f4b1 | 5022 | if (status) |
c2d1d6a8 | 5023 | return status; |
a0649b2d CH |
5024 | status = check_stateid_generation(stateid, &s->sc_stateid, |
5025 | nfsd4_has_session(cstate)); | |
69064a27 BF |
5026 | if (status) |
5027 | goto out; | |
a0649b2d | 5028 | |
f7a4d872 BF |
5029 | switch (s->sc_type) { |
5030 | case NFS4_DELEG_STID: | |
a0649b2d | 5031 | status = nfs4_check_delegmode(delegstateid(s), flags); |
f7a4d872 BF |
5032 | break; |
5033 | case NFS4_OPEN_STID: | |
5034 | case NFS4_LOCK_STID: | |
a0649b2d | 5035 | status = nfs4_check_olstateid(fhp, openlockstateid(s), flags); |
f7a4d872 BF |
5036 | break; |
5037 | default: | |
14bcab1a | 5038 | status = nfserr_bad_stateid; |
a0649b2d CH |
5039 | break; |
5040 | } | |
8fcd461d JL |
5041 | if (status) |
5042 | goto out; | |
5043 | status = nfs4_check_fh(fhp, s); | |
a0649b2d | 5044 | |
af90f707 CH |
5045 | done: |
5046 | if (!status && filpp) | |
5047 | status = nfs4_check_file(rqstp, fhp, s, filpp, tmp_file, flags); | |
1da177e4 | 5048 | out: |
af90f707 CH |
5049 | if (s) |
5050 | nfs4_put_stid(s); | |
1da177e4 LT |
5051 | return status; |
5052 | } | |
5053 | ||
17456804 BS |
5054 | /* |
5055 | * Test if the stateid is valid | |
5056 | */ | |
5057 | __be32 | |
5058 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
eb69853d | 5059 | union nfsd4_op_u *u) |
17456804 | 5060 | { |
eb69853d | 5061 | struct nfsd4_test_stateid *test_stateid = &u->test_stateid; |
03cfb420 BS |
5062 | struct nfsd4_test_stateid_id *stateid; |
5063 | struct nfs4_client *cl = cstate->session->se_client; | |
5064 | ||
03cfb420 | 5065 | list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) |
7df302f7 CL |
5066 | stateid->ts_id_status = |
5067 | nfsd4_validate_stateid(cl, &stateid->ts_id_stateid); | |
03cfb420 | 5068 | |
17456804 BS |
5069 | return nfs_ok; |
5070 | } | |
5071 | ||
42691398 CL |
5072 | static __be32 |
5073 | nfsd4_free_lock_stateid(stateid_t *stateid, struct nfs4_stid *s) | |
5074 | { | |
5075 | struct nfs4_ol_stateid *stp = openlockstateid(s); | |
5076 | __be32 ret; | |
5077 | ||
5078 | mutex_lock(&stp->st_mutex); | |
5079 | ||
5080 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); | |
5081 | if (ret) | |
5082 | goto out; | |
5083 | ||
5084 | ret = nfserr_locks_held; | |
5085 | if (check_for_locks(stp->st_stid.sc_file, | |
5086 | lockowner(stp->st_stateowner))) | |
5087 | goto out; | |
5088 | ||
5089 | release_lock_stateid(stp); | |
5090 | ret = nfs_ok; | |
5091 | ||
5092 | out: | |
5093 | mutex_unlock(&stp->st_mutex); | |
5094 | nfs4_put_stid(s); | |
5095 | return ret; | |
5096 | } | |
5097 | ||
e1ca12df BS |
5098 | __be32 |
5099 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
eb69853d | 5100 | union nfsd4_op_u *u) |
e1ca12df | 5101 | { |
eb69853d | 5102 | struct nfsd4_free_stateid *free_stateid = &u->free_stateid; |
e1ca12df | 5103 | stateid_t *stateid = &free_stateid->fr_stateid; |
2da1cec7 | 5104 | struct nfs4_stid *s; |
3bd64a5b | 5105 | struct nfs4_delegation *dp; |
38c2f4b1 | 5106 | struct nfs4_client *cl = cstate->session->se_client; |
2da1cec7 | 5107 | __be32 ret = nfserr_bad_stateid; |
e1ca12df | 5108 | |
1af71cc8 JL |
5109 | spin_lock(&cl->cl_lock); |
5110 | s = find_stateid_locked(cl, stateid); | |
2da1cec7 | 5111 | if (!s) |
1af71cc8 | 5112 | goto out_unlock; |
2da1cec7 BF |
5113 | switch (s->sc_type) { |
5114 | case NFS4_DELEG_STID: | |
e1ca12df | 5115 | ret = nfserr_locks_held; |
1af71cc8 | 5116 | break; |
2da1cec7 | 5117 | case NFS4_OPEN_STID: |
2da1cec7 BF |
5118 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); |
5119 | if (ret) | |
1af71cc8 JL |
5120 | break; |
5121 | ret = nfserr_locks_held; | |
f7a4d872 | 5122 | break; |
1af71cc8 | 5123 | case NFS4_LOCK_STID: |
42691398 | 5124 | atomic_inc(&s->sc_count); |
1af71cc8 | 5125 | spin_unlock(&cl->cl_lock); |
42691398 | 5126 | ret = nfsd4_free_lock_stateid(stateid, s); |
1af71cc8 | 5127 | goto out; |
3bd64a5b BF |
5128 | case NFS4_REVOKED_DELEG_STID: |
5129 | dp = delegstateid(s); | |
2d4a532d JL |
5130 | list_del_init(&dp->dl_recall_lru); |
5131 | spin_unlock(&cl->cl_lock); | |
6011695d | 5132 | nfs4_put_stid(s); |
3bd64a5b | 5133 | ret = nfs_ok; |
1af71cc8 JL |
5134 | goto out; |
5135 | /* Default falls through and returns nfserr_bad_stateid */ | |
e1ca12df | 5136 | } |
1af71cc8 JL |
5137 | out_unlock: |
5138 | spin_unlock(&cl->cl_lock); | |
e1ca12df | 5139 | out: |
e1ca12df BS |
5140 | return ret; |
5141 | } | |
5142 | ||
4c4cd222 N |
5143 | static inline int |
5144 | setlkflg (int type) | |
5145 | { | |
5146 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
5147 | RD_STATE : WR_STATE; | |
5148 | } | |
1da177e4 | 5149 | |
dcef0413 | 5150 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
c0a5d93e BF |
5151 | { |
5152 | struct svc_fh *current_fh = &cstate->current_fh; | |
5153 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
5154 | __be32 status; | |
5155 | ||
c0a5d93e BF |
5156 | status = nfsd4_check_seqid(cstate, sop, seqid); |
5157 | if (status) | |
5158 | return status; | |
3bd64a5b BF |
5159 | if (stp->st_stid.sc_type == NFS4_CLOSED_STID |
5160 | || stp->st_stid.sc_type == NFS4_REVOKED_DELEG_STID) | |
f7a4d872 BF |
5161 | /* |
5162 | * "Closed" stateid's exist *only* to return | |
3bd64a5b BF |
5163 | * nfserr_replay_me from the previous step, and |
5164 | * revoked delegations are kept only for free_stateid. | |
f7a4d872 BF |
5165 | */ |
5166 | return nfserr_bad_stateid; | |
feb9dad5 | 5167 | mutex_lock(&stp->st_mutex); |
f7a4d872 | 5168 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); |
35a92fe8 JL |
5169 | if (status == nfs_ok) |
5170 | status = nfs4_check_fh(current_fh, &stp->st_stid); | |
5171 | if (status != nfs_ok) | |
feb9dad5 | 5172 | mutex_unlock(&stp->st_mutex); |
35a92fe8 | 5173 | return status; |
c0a5d93e BF |
5174 | } |
5175 | ||
1da177e4 LT |
5176 | /* |
5177 | * Checks for sequence id mutating operations. | |
5178 | */ | |
b37ad28b | 5179 | static __be32 |
dd453dfd | 5180 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2288d0e3 | 5181 | stateid_t *stateid, char typemask, |
3320fef1 SK |
5182 | struct nfs4_ol_stateid **stpp, |
5183 | struct nfsd_net *nn) | |
1da177e4 | 5184 | { |
0836f587 | 5185 | __be32 status; |
38c2f4b1 | 5186 | struct nfs4_stid *s; |
e17f99b7 | 5187 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 5188 | |
8c10cbdb BH |
5189 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
5190 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 5191 | |
1da177e4 | 5192 | *stpp = NULL; |
2dd6e458 | 5193 | status = nfsd4_lookup_stateid(cstate, stateid, typemask, &s, nn); |
c0a5d93e BF |
5194 | if (status) |
5195 | return status; | |
e17f99b7 | 5196 | stp = openlockstateid(s); |
58fb12e6 | 5197 | nfsd4_cstate_assign_replay(cstate, stp->st_stateowner); |
1da177e4 | 5198 | |
e17f99b7 | 5199 | status = nfs4_seqid_op_checks(cstate, stateid, seqid, stp); |
fd911011 | 5200 | if (!status) |
e17f99b7 | 5201 | *stpp = stp; |
fd911011 TM |
5202 | else |
5203 | nfs4_put_stid(&stp->st_stid); | |
e17f99b7 | 5204 | return status; |
c0a5d93e | 5205 | } |
39325bd0 | 5206 | |
3320fef1 SK |
5207 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
5208 | stateid_t *stateid, struct nfs4_ol_stateid **stpp, struct nfsd_net *nn) | |
c0a5d93e BF |
5209 | { |
5210 | __be32 status; | |
5211 | struct nfs4_openowner *oo; | |
4cbfc9f7 | 5212 | struct nfs4_ol_stateid *stp; |
1da177e4 | 5213 | |
c0a5d93e | 5214 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
4cbfc9f7 | 5215 | NFS4_OPEN_STID, &stp, nn); |
7a8711c9 BF |
5216 | if (status) |
5217 | return status; | |
4cbfc9f7 TM |
5218 | oo = openowner(stp->st_stateowner); |
5219 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { | |
feb9dad5 | 5220 | mutex_unlock(&stp->st_mutex); |
4cbfc9f7 | 5221 | nfs4_put_stid(&stp->st_stid); |
3a4f98bb | 5222 | return nfserr_bad_stateid; |
4cbfc9f7 TM |
5223 | } |
5224 | *stpp = stp; | |
3a4f98bb | 5225 | return nfs_ok; |
1da177e4 LT |
5226 | } |
5227 | ||
b37ad28b | 5228 | __be32 |
ca364317 | 5229 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 5230 | union nfsd4_op_u *u) |
1da177e4 | 5231 | { |
eb69853d | 5232 | struct nfsd4_open_confirm *oc = &u->open_confirm; |
b37ad28b | 5233 | __be32 status; |
fe0750e5 | 5234 | struct nfs4_openowner *oo; |
dcef0413 | 5235 | struct nfs4_ol_stateid *stp; |
3320fef1 | 5236 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 5237 | |
a6a9f18f AV |
5238 | dprintk("NFSD: nfsd4_open_confirm on file %pd\n", |
5239 | cstate->current_fh.fh_dentry); | |
1da177e4 | 5240 | |
ca364317 | 5241 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
5242 | if (status) |
5243 | return status; | |
1da177e4 | 5244 | |
9072d5c6 | 5245 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 5246 | oc->oc_seqid, &oc->oc_req_stateid, |
3320fef1 | 5247 | NFS4_OPEN_STID, &stp, nn); |
9072d5c6 | 5248 | if (status) |
68b66e82 | 5249 | goto out; |
fe0750e5 | 5250 | oo = openowner(stp->st_stateowner); |
68b66e82 | 5251 | status = nfserr_bad_stateid; |
35a92fe8 | 5252 | if (oo->oo_flags & NFS4_OO_CONFIRMED) { |
feb9dad5 | 5253 | mutex_unlock(&stp->st_mutex); |
2585fc79 | 5254 | goto put_stateid; |
35a92fe8 | 5255 | } |
dad1c067 | 5256 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
9767feb2 | 5257 | nfs4_inc_and_copy_stateid(&oc->oc_resp_stateid, &stp->st_stid); |
feb9dad5 | 5258 | mutex_unlock(&stp->st_mutex); |
8c10cbdb | 5259 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
dcef0413 | 5260 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); |
c7b9a459 | 5261 | |
2a4317c5 | 5262 | nfsd4_client_record_create(oo->oo_owner.so_client); |
68b66e82 | 5263 | status = nfs_ok; |
2585fc79 TM |
5264 | put_stateid: |
5265 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 5266 | out: |
9411b1d4 | 5267 | nfsd4_bump_seqid(cstate, status); |
1da177e4 LT |
5268 | return status; |
5269 | } | |
5270 | ||
6409a5a6 | 5271 | static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) |
1da177e4 | 5272 | { |
82c5ff1b | 5273 | if (!test_access(access, stp)) |
6409a5a6 | 5274 | return; |
11b9164a | 5275 | nfs4_file_put_access(stp->st_stid.sc_file, access); |
82c5ff1b | 5276 | clear_access(access, stp); |
6409a5a6 | 5277 | } |
f197c271 | 5278 | |
6409a5a6 BF |
5279 | static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) |
5280 | { | |
5281 | switch (to_access) { | |
5282 | case NFS4_SHARE_ACCESS_READ: | |
5283 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); | |
5284 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
5285 | break; | |
5286 | case NFS4_SHARE_ACCESS_WRITE: | |
5287 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); | |
5288 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
5289 | break; | |
5290 | case NFS4_SHARE_ACCESS_BOTH: | |
5291 | break; | |
5292 | default: | |
063b0fb9 | 5293 | WARN_ON_ONCE(1); |
1da177e4 LT |
5294 | } |
5295 | } | |
5296 | ||
b37ad28b | 5297 | __be32 |
ca364317 | 5298 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
eb69853d | 5299 | struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) |
1da177e4 | 5300 | { |
eb69853d | 5301 | struct nfsd4_open_downgrade *od = &u->open_downgrade; |
b37ad28b | 5302 | __be32 status; |
dcef0413 | 5303 | struct nfs4_ol_stateid *stp; |
3320fef1 | 5304 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 5305 | |
a6a9f18f AV |
5306 | dprintk("NFSD: nfsd4_open_downgrade on file %pd\n", |
5307 | cstate->current_fh.fh_dentry); | |
1da177e4 | 5308 | |
c30e92df | 5309 | /* We don't yet support WANT bits: */ |
2c8bd7e0 BH |
5310 | if (od->od_deleg_want) |
5311 | dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, | |
5312 | od->od_deleg_want); | |
1da177e4 | 5313 | |
c0a5d93e | 5314 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
3320fef1 | 5315 | &od->od_stateid, &stp, nn); |
9072d5c6 | 5316 | if (status) |
1da177e4 | 5317 | goto out; |
1da177e4 | 5318 | status = nfserr_inval; |
82c5ff1b | 5319 | if (!test_access(od->od_share_access, stp)) { |
c11c591f | 5320 | dprintk("NFSD: access not a subset of current bitmap: 0x%hhx, input access=%08x\n", |
1da177e4 | 5321 | stp->st_access_bmap, od->od_share_access); |
0667b1e9 | 5322 | goto put_stateid; |
1da177e4 | 5323 | } |
ce0fc43c | 5324 | if (!test_deny(od->od_share_deny, stp)) { |
c11c591f | 5325 | dprintk("NFSD: deny not a subset of current bitmap: 0x%hhx, input deny=%08x\n", |
1da177e4 | 5326 | stp->st_deny_bmap, od->od_share_deny); |
0667b1e9 | 5327 | goto put_stateid; |
1da177e4 | 5328 | } |
6409a5a6 | 5329 | nfs4_stateid_downgrade(stp, od->od_share_access); |
ce0fc43c | 5330 | reset_union_bmap_deny(od->od_share_deny, stp); |
9767feb2 | 5331 | nfs4_inc_and_copy_stateid(&od->od_stateid, &stp->st_stid); |
1da177e4 | 5332 | status = nfs_ok; |
0667b1e9 | 5333 | put_stateid: |
feb9dad5 | 5334 | mutex_unlock(&stp->st_mutex); |
0667b1e9 | 5335 | nfs4_put_stid(&stp->st_stid); |
1da177e4 | 5336 | out: |
9411b1d4 | 5337 | nfsd4_bump_seqid(cstate, status); |
1da177e4 LT |
5338 | return status; |
5339 | } | |
5340 | ||
f7a4d872 BF |
5341 | static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) |
5342 | { | |
acf9295b | 5343 | struct nfs4_client *clp = s->st_stid.sc_client; |
e8568739 | 5344 | bool unhashed; |
d83017f9 | 5345 | LIST_HEAD(reaplist); |
acf9295b | 5346 | |
f7a4d872 | 5347 | s->st_stid.sc_type = NFS4_CLOSED_STID; |
2c41beb0 | 5348 | spin_lock(&clp->cl_lock); |
e8568739 | 5349 | unhashed = unhash_open_stateid(s, &reaplist); |
acf9295b | 5350 | |
d83017f9 | 5351 | if (clp->cl_minorversion) { |
e8568739 JL |
5352 | if (unhashed) |
5353 | put_ol_stateid_locked(s, &reaplist); | |
d83017f9 JL |
5354 | spin_unlock(&clp->cl_lock); |
5355 | free_ol_stateid_reaplist(&reaplist); | |
5356 | } else { | |
5357 | spin_unlock(&clp->cl_lock); | |
5358 | free_ol_stateid_reaplist(&reaplist); | |
e8568739 JL |
5359 | if (unhashed) |
5360 | move_to_close_lru(s, clp->net); | |
d83017f9 | 5361 | } |
38c387b5 BF |
5362 | } |
5363 | ||
1da177e4 LT |
5364 | /* |
5365 | * nfs4_unlock_state() called after encode | |
5366 | */ | |
b37ad28b | 5367 | __be32 |
ca364317 | 5368 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 5369 | union nfsd4_op_u *u) |
1da177e4 | 5370 | { |
eb69853d | 5371 | struct nfsd4_close *close = &u->close; |
b37ad28b | 5372 | __be32 status; |
dcef0413 | 5373 | struct nfs4_ol_stateid *stp; |
3320fef1 SK |
5374 | struct net *net = SVC_NET(rqstp); |
5375 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 | 5376 | |
a6a9f18f AV |
5377 | dprintk("NFSD: nfsd4_close on file %pd\n", |
5378 | cstate->current_fh.fh_dentry); | |
1da177e4 | 5379 | |
f7a4d872 BF |
5380 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
5381 | &close->cl_stateid, | |
5382 | NFS4_OPEN_STID|NFS4_CLOSED_STID, | |
3320fef1 | 5383 | &stp, nn); |
9411b1d4 | 5384 | nfsd4_bump_seqid(cstate, status); |
9072d5c6 | 5385 | if (status) |
1da177e4 | 5386 | goto out; |
9767feb2 | 5387 | nfs4_inc_and_copy_stateid(&close->cl_stateid, &stp->st_stid); |
feb9dad5 | 5388 | mutex_unlock(&stp->st_mutex); |
1da177e4 | 5389 | |
f7a4d872 | 5390 | nfsd4_close_open_stateid(stp); |
8a0b589d TM |
5391 | |
5392 | /* put reference from nfs4_preprocess_seqid_op */ | |
5393 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 5394 | out: |
1da177e4 LT |
5395 | return status; |
5396 | } | |
5397 | ||
b37ad28b | 5398 | __be32 |
ca364317 | 5399 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 5400 | union nfsd4_op_u *u) |
1da177e4 | 5401 | { |
eb69853d | 5402 | struct nfsd4_delegreturn *dr = &u->delegreturn; |
203a8c8e BF |
5403 | struct nfs4_delegation *dp; |
5404 | stateid_t *stateid = &dr->dr_stateid; | |
38c2f4b1 | 5405 | struct nfs4_stid *s; |
b37ad28b | 5406 | __be32 status; |
3320fef1 | 5407 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 5408 | |
ca364317 | 5409 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e | 5410 | return status; |
1da177e4 | 5411 | |
2dd6e458 | 5412 | status = nfsd4_lookup_stateid(cstate, stateid, NFS4_DELEG_STID, &s, nn); |
38c2f4b1 | 5413 | if (status) |
203a8c8e | 5414 | goto out; |
38c2f4b1 | 5415 | dp = delegstateid(s); |
d5477a8d | 5416 | status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); |
203a8c8e | 5417 | if (status) |
fd911011 | 5418 | goto put_stateid; |
203a8c8e | 5419 | |
3bd64a5b | 5420 | destroy_delegation(dp); |
fd911011 TM |
5421 | put_stateid: |
5422 | nfs4_put_stid(&dp->dl_stid); | |
1da177e4 LT |
5423 | out: |
5424 | return status; | |
5425 | } | |
5426 | ||
87df4de8 BH |
5427 | static inline u64 |
5428 | end_offset(u64 start, u64 len) | |
5429 | { | |
5430 | u64 end; | |
5431 | ||
5432 | end = start + len; | |
5433 | return end >= start ? end: NFS4_MAX_UINT64; | |
5434 | } | |
5435 | ||
5436 | /* last octet in a range */ | |
5437 | static inline u64 | |
5438 | last_byte_offset(u64 start, u64 len) | |
5439 | { | |
5440 | u64 end; | |
5441 | ||
063b0fb9 | 5442 | WARN_ON_ONCE(!len); |
87df4de8 BH |
5443 | end = start + len; |
5444 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
5445 | } | |
5446 | ||
1da177e4 LT |
5447 | /* |
5448 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
5449 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
5450 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
5451 | * locking, this prevents us from being completely protocol-compliant. The | |
5452 | * real solution to this problem is to start using unsigned file offsets in | |
5453 | * the VFS, but this is a very deep change! | |
5454 | */ | |
5455 | static inline void | |
5456 | nfs4_transform_lock_offset(struct file_lock *lock) | |
5457 | { | |
5458 | if (lock->fl_start < 0) | |
5459 | lock->fl_start = OFFSET_MAX; | |
5460 | if (lock->fl_end < 0) | |
5461 | lock->fl_end = OFFSET_MAX; | |
5462 | } | |
5463 | ||
cae80b30 JL |
5464 | static fl_owner_t |
5465 | nfsd4_fl_get_owner(fl_owner_t owner) | |
aef9583b | 5466 | { |
cae80b30 JL |
5467 | struct nfs4_lockowner *lo = (struct nfs4_lockowner *)owner; |
5468 | ||
5469 | nfs4_get_stateowner(&lo->lo_owner); | |
5470 | return owner; | |
aef9583b KM |
5471 | } |
5472 | ||
cae80b30 JL |
5473 | static void |
5474 | nfsd4_fl_put_owner(fl_owner_t owner) | |
aef9583b | 5475 | { |
cae80b30 | 5476 | struct nfs4_lockowner *lo = (struct nfs4_lockowner *)owner; |
aef9583b | 5477 | |
cae80b30 | 5478 | if (lo) |
aef9583b | 5479 | nfs4_put_stateowner(&lo->lo_owner); |
aef9583b KM |
5480 | } |
5481 | ||
76d348fa JL |
5482 | static void |
5483 | nfsd4_lm_notify(struct file_lock *fl) | |
5484 | { | |
5485 | struct nfs4_lockowner *lo = (struct nfs4_lockowner *)fl->fl_owner; | |
5486 | struct net *net = lo->lo_owner.so_client->net; | |
5487 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
5488 | struct nfsd4_blocked_lock *nbl = container_of(fl, | |
5489 | struct nfsd4_blocked_lock, nbl_lock); | |
5490 | bool queue = false; | |
5491 | ||
7919d0a2 | 5492 | /* An empty list means that something else is going to be using it */ |
0cc11a61 | 5493 | spin_lock(&nn->blocked_locks_lock); |
76d348fa JL |
5494 | if (!list_empty(&nbl->nbl_list)) { |
5495 | list_del_init(&nbl->nbl_list); | |
7919d0a2 | 5496 | list_del_init(&nbl->nbl_lru); |
76d348fa JL |
5497 | queue = true; |
5498 | } | |
0cc11a61 | 5499 | spin_unlock(&nn->blocked_locks_lock); |
76d348fa JL |
5500 | |
5501 | if (queue) | |
5502 | nfsd4_run_cb(&nbl->nbl_cb); | |
5503 | } | |
5504 | ||
7b021967 | 5505 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
76d348fa | 5506 | .lm_notify = nfsd4_lm_notify, |
aef9583b KM |
5507 | .lm_get_owner = nfsd4_fl_get_owner, |
5508 | .lm_put_owner = nfsd4_fl_put_owner, | |
d5b9026a | 5509 | }; |
1da177e4 LT |
5510 | |
5511 | static inline void | |
5512 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
5513 | { | |
fe0750e5 | 5514 | struct nfs4_lockowner *lo; |
1da177e4 | 5515 | |
d5b9026a | 5516 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 BF |
5517 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
5518 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, | |
5519 | lo->lo_owner.so_owner.len, GFP_KERNEL); | |
7c13f344 BF |
5520 | if (!deny->ld_owner.data) |
5521 | /* We just don't care that much */ | |
5522 | goto nevermind; | |
fe0750e5 BF |
5523 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
5524 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; | |
d5b9026a | 5525 | } else { |
7c13f344 BF |
5526 | nevermind: |
5527 | deny->ld_owner.len = 0; | |
5528 | deny->ld_owner.data = NULL; | |
d5b9026a N |
5529 | deny->ld_clientid.cl_boot = 0; |
5530 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
5531 | } |
5532 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
5533 | deny->ld_length = NFS4_MAX_UINT64; |
5534 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
5535 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
5536 | deny->ld_type = NFS4_READ_LT; | |
5537 | if (fl->fl_type != F_RDLCK) | |
5538 | deny->ld_type = NFS4_WRITE_LT; | |
5539 | } | |
5540 | ||
fe0750e5 | 5541 | static struct nfs4_lockowner * |
c8623999 | 5542 | find_lockowner_str_locked(struct nfs4_client *clp, struct xdr_netobj *owner) |
1da177e4 | 5543 | { |
d4f0489f | 5544 | unsigned int strhashval = ownerstr_hashval(owner); |
b3c32bcd | 5545 | struct nfs4_stateowner *so; |
1da177e4 | 5546 | |
0a880a28 TM |
5547 | lockdep_assert_held(&clp->cl_lock); |
5548 | ||
d4f0489f TM |
5549 | list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[strhashval], |
5550 | so_strhash) { | |
b3c32bcd TM |
5551 | if (so->so_is_open_owner) |
5552 | continue; | |
b5971afa KM |
5553 | if (same_owner_str(so, owner)) |
5554 | return lockowner(nfs4_get_stateowner(so)); | |
1da177e4 LT |
5555 | } |
5556 | return NULL; | |
5557 | } | |
5558 | ||
c58c6610 | 5559 | static struct nfs4_lockowner * |
c8623999 | 5560 | find_lockowner_str(struct nfs4_client *clp, struct xdr_netobj *owner) |
c58c6610 TM |
5561 | { |
5562 | struct nfs4_lockowner *lo; | |
5563 | ||
d4f0489f | 5564 | spin_lock(&clp->cl_lock); |
c8623999 | 5565 | lo = find_lockowner_str_locked(clp, owner); |
d4f0489f | 5566 | spin_unlock(&clp->cl_lock); |
c58c6610 TM |
5567 | return lo; |
5568 | } | |
5569 | ||
8f4b54c5 JL |
5570 | static void nfs4_unhash_lockowner(struct nfs4_stateowner *sop) |
5571 | { | |
c58c6610 | 5572 | unhash_lockowner_locked(lockowner(sop)); |
8f4b54c5 JL |
5573 | } |
5574 | ||
6b180f0b JL |
5575 | static void nfs4_free_lockowner(struct nfs4_stateowner *sop) |
5576 | { | |
5577 | struct nfs4_lockowner *lo = lockowner(sop); | |
5578 | ||
5579 | kmem_cache_free(lockowner_slab, lo); | |
5580 | } | |
5581 | ||
5582 | static const struct nfs4_stateowner_operations lockowner_ops = { | |
8f4b54c5 JL |
5583 | .so_unhash = nfs4_unhash_lockowner, |
5584 | .so_free = nfs4_free_lockowner, | |
6b180f0b JL |
5585 | }; |
5586 | ||
1da177e4 LT |
5587 | /* |
5588 | * Alloc a lock owner structure. | |
5589 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 5590 | * occurred. |
1da177e4 | 5591 | * |
16bfdaaf | 5592 | * strhashval = ownerstr_hashval |
1da177e4 | 5593 | */ |
fe0750e5 | 5594 | static struct nfs4_lockowner * |
c58c6610 TM |
5595 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, |
5596 | struct nfs4_ol_stateid *open_stp, | |
5597 | struct nfsd4_lock *lock) | |
5598 | { | |
c58c6610 | 5599 | struct nfs4_lockowner *lo, *ret; |
1da177e4 | 5600 | |
fe0750e5 BF |
5601 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
5602 | if (!lo) | |
1da177e4 | 5603 | return NULL; |
76d348fa | 5604 | INIT_LIST_HEAD(&lo->lo_blocked); |
fe0750e5 BF |
5605 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
5606 | lo->lo_owner.so_is_open_owner = 0; | |
5db1c03f | 5607 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid; |
6b180f0b | 5608 | lo->lo_owner.so_ops = &lockowner_ops; |
d4f0489f | 5609 | spin_lock(&clp->cl_lock); |
c8623999 | 5610 | ret = find_lockowner_str_locked(clp, &lock->lk_new_owner); |
c58c6610 TM |
5611 | if (ret == NULL) { |
5612 | list_add(&lo->lo_owner.so_strhash, | |
d4f0489f | 5613 | &clp->cl_ownerstr_hashtbl[strhashval]); |
c58c6610 TM |
5614 | ret = lo; |
5615 | } else | |
d50ffded KM |
5616 | nfs4_free_stateowner(&lo->lo_owner); |
5617 | ||
d4f0489f | 5618 | spin_unlock(&clp->cl_lock); |
340f0ba1 | 5619 | return ret; |
1da177e4 LT |
5620 | } |
5621 | ||
356a95ec JL |
5622 | static void |
5623 | init_lock_stateid(struct nfs4_ol_stateid *stp, struct nfs4_lockowner *lo, | |
5624 | struct nfs4_file *fp, struct inode *inode, | |
5625 | struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 5626 | { |
d3b313a4 | 5627 | struct nfs4_client *clp = lo->lo_owner.so_client; |
1da177e4 | 5628 | |
356a95ec JL |
5629 | lockdep_assert_held(&clp->cl_lock); |
5630 | ||
3d0fabd5 | 5631 | atomic_inc(&stp->st_stid.sc_count); |
3abdb607 | 5632 | stp->st_stid.sc_type = NFS4_LOCK_STID; |
b5971afa | 5633 | stp->st_stateowner = nfs4_get_stateowner(&lo->lo_owner); |
13cd2184 | 5634 | get_nfs4_file(fp); |
11b9164a | 5635 | stp->st_stid.sc_file = fp; |
0997b173 | 5636 | stp->st_access_bmap = 0; |
1da177e4 | 5637 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 5638 | stp->st_openstp = open_stp; |
feb9dad5 | 5639 | mutex_init(&stp->st_mutex); |
3c87b9b7 | 5640 | list_add(&stp->st_locks, &open_stp->st_locks); |
1c755dc1 | 5641 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
1d31a253 TM |
5642 | spin_lock(&fp->fi_lock); |
5643 | list_add(&stp->st_perfile, &fp->fi_stateids); | |
5644 | spin_unlock(&fp->fi_lock); | |
1da177e4 LT |
5645 | } |
5646 | ||
c53530da JL |
5647 | static struct nfs4_ol_stateid * |
5648 | find_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp) | |
5649 | { | |
5650 | struct nfs4_ol_stateid *lst; | |
356a95ec JL |
5651 | struct nfs4_client *clp = lo->lo_owner.so_client; |
5652 | ||
5653 | lockdep_assert_held(&clp->cl_lock); | |
c53530da JL |
5654 | |
5655 | list_for_each_entry(lst, &lo->lo_owner.so_stateids, st_perstateowner) { | |
3d0fabd5 TM |
5656 | if (lst->st_stid.sc_file == fp) { |
5657 | atomic_inc(&lst->st_stid.sc_count); | |
c53530da | 5658 | return lst; |
3d0fabd5 | 5659 | } |
c53530da JL |
5660 | } |
5661 | return NULL; | |
5662 | } | |
5663 | ||
356a95ec JL |
5664 | static struct nfs4_ol_stateid * |
5665 | find_or_create_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fi, | |
5666 | struct inode *inode, struct nfs4_ol_stateid *ost, | |
5667 | bool *new) | |
5668 | { | |
5669 | struct nfs4_stid *ns = NULL; | |
5670 | struct nfs4_ol_stateid *lst; | |
5671 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); | |
5672 | struct nfs4_client *clp = oo->oo_owner.so_client; | |
5673 | ||
5674 | spin_lock(&clp->cl_lock); | |
5675 | lst = find_lock_stateid(lo, fi); | |
5676 | if (lst == NULL) { | |
5677 | spin_unlock(&clp->cl_lock); | |
d19fb70d | 5678 | ns = nfs4_alloc_stid(clp, stateid_slab, nfs4_free_lock_stateid); |
356a95ec JL |
5679 | if (ns == NULL) |
5680 | return NULL; | |
5681 | ||
5682 | spin_lock(&clp->cl_lock); | |
5683 | lst = find_lock_stateid(lo, fi); | |
5684 | if (likely(!lst)) { | |
5685 | lst = openlockstateid(ns); | |
5686 | init_lock_stateid(lst, lo, fi, inode, ost); | |
5687 | ns = NULL; | |
5688 | *new = true; | |
5689 | } | |
5690 | } | |
5691 | spin_unlock(&clp->cl_lock); | |
5692 | if (ns) | |
5693 | nfs4_put_stid(ns); | |
5694 | return lst; | |
5695 | } | |
c53530da | 5696 | |
fd39ca9a | 5697 | static int |
1da177e4 LT |
5698 | check_lock_length(u64 offset, u64 length) |
5699 | { | |
e7969315 KM |
5700 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
5701 | (length > ~offset))); | |
1da177e4 LT |
5702 | } |
5703 | ||
dcef0413 | 5704 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 | 5705 | { |
11b9164a | 5706 | struct nfs4_file *fp = lock_stp->st_stid.sc_file; |
0997b173 | 5707 | |
7214e860 JL |
5708 | lockdep_assert_held(&fp->fi_lock); |
5709 | ||
82c5ff1b | 5710 | if (test_access(access, lock_stp)) |
0997b173 | 5711 | return; |
12659651 | 5712 | __nfs4_file_get_access(fp, access); |
82c5ff1b | 5713 | set_access(access, lock_stp); |
0997b173 BF |
5714 | } |
5715 | ||
356a95ec JL |
5716 | static __be32 |
5717 | lookup_or_create_lock_state(struct nfsd4_compound_state *cstate, | |
5718 | struct nfs4_ol_stateid *ost, | |
5719 | struct nfsd4_lock *lock, | |
dd257933 | 5720 | struct nfs4_ol_stateid **plst, bool *new) |
64a284d0 | 5721 | { |
5db1c03f | 5722 | __be32 status; |
11b9164a | 5723 | struct nfs4_file *fi = ost->st_stid.sc_file; |
64a284d0 BF |
5724 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); |
5725 | struct nfs4_client *cl = oo->oo_owner.so_client; | |
2b0143b5 | 5726 | struct inode *inode = d_inode(cstate->current_fh.fh_dentry); |
64a284d0 | 5727 | struct nfs4_lockowner *lo; |
dd257933 | 5728 | struct nfs4_ol_stateid *lst; |
64a284d0 | 5729 | unsigned int strhashval; |
dd257933 | 5730 | bool hashed; |
64a284d0 | 5731 | |
c8623999 | 5732 | lo = find_lockowner_str(cl, &lock->lk_new_owner); |
c53530da | 5733 | if (!lo) { |
76f6c9e1 | 5734 | strhashval = ownerstr_hashval(&lock->lk_new_owner); |
c53530da JL |
5735 | lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); |
5736 | if (lo == NULL) | |
5737 | return nfserr_jukebox; | |
5738 | } else { | |
5739 | /* with an existing lockowner, seqids must be the same */ | |
5db1c03f | 5740 | status = nfserr_bad_seqid; |
c53530da JL |
5741 | if (!cstate->minorversion && |
5742 | lock->lk_new_lock_seqid != lo->lo_owner.so_seqid) | |
5db1c03f | 5743 | goto out; |
64a284d0 | 5744 | } |
c53530da | 5745 | |
dd257933 JL |
5746 | retry: |
5747 | lst = find_or_create_lock_stateid(lo, fi, inode, ost, new); | |
5748 | if (lst == NULL) { | |
5db1c03f JL |
5749 | status = nfserr_jukebox; |
5750 | goto out; | |
64a284d0 | 5751 | } |
dd257933 JL |
5752 | |
5753 | mutex_lock(&lst->st_mutex); | |
5754 | ||
5755 | /* See if it's still hashed to avoid race with FREE_STATEID */ | |
5756 | spin_lock(&cl->cl_lock); | |
5757 | hashed = !list_empty(&lst->st_perfile); | |
5758 | spin_unlock(&cl->cl_lock); | |
5759 | ||
5760 | if (!hashed) { | |
5761 | mutex_unlock(&lst->st_mutex); | |
5762 | nfs4_put_stid(&lst->st_stid); | |
5763 | goto retry; | |
5764 | } | |
5db1c03f | 5765 | status = nfs_ok; |
dd257933 | 5766 | *plst = lst; |
5db1c03f JL |
5767 | out: |
5768 | nfs4_put_stateowner(&lo->lo_owner); | |
5769 | return status; | |
64a284d0 BF |
5770 | } |
5771 | ||
1da177e4 LT |
5772 | /* |
5773 | * LOCK operation | |
5774 | */ | |
b37ad28b | 5775 | __be32 |
ca364317 | 5776 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 5777 | union nfsd4_op_u *u) |
1da177e4 | 5778 | { |
eb69853d | 5779 | struct nfsd4_lock *lock = &u->lock; |
fe0750e5 BF |
5780 | struct nfs4_openowner *open_sop = NULL; |
5781 | struct nfs4_lockowner *lock_sop = NULL; | |
3d0fabd5 | 5782 | struct nfs4_ol_stateid *lock_stp = NULL; |
0667b1e9 | 5783 | struct nfs4_ol_stateid *open_stp = NULL; |
7214e860 | 5784 | struct nfs4_file *fp; |
7d947842 | 5785 | struct file *filp = NULL; |
76d348fa | 5786 | struct nfsd4_blocked_lock *nbl = NULL; |
21179d81 JL |
5787 | struct file_lock *file_lock = NULL; |
5788 | struct file_lock *conflock = NULL; | |
b37ad28b | 5789 | __be32 status = 0; |
b34f27aa | 5790 | int lkflg; |
b8dd7b9a | 5791 | int err; |
5db1c03f | 5792 | bool new = false; |
76d348fa JL |
5793 | unsigned char fl_type; |
5794 | unsigned int fl_flags = FL_POSIX; | |
3320fef1 SK |
5795 | struct net *net = SVC_NET(rqstp); |
5796 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 LT |
5797 | |
5798 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
5799 | (long long) lock->lk_offset, | |
5800 | (long long) lock->lk_length); | |
5801 | ||
1da177e4 LT |
5802 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
5803 | return nfserr_inval; | |
5804 | ||
ca364317 | 5805 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 5806 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
5807 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
5808 | return status; | |
5809 | } | |
5810 | ||
1da177e4 | 5811 | if (lock->lk_is_new) { |
684e5638 BF |
5812 | if (nfsd4_has_session(cstate)) |
5813 | /* See rfc 5661 18.10.3: given clientid is ignored: */ | |
76f6c9e1 | 5814 | memcpy(&lock->lk_new_clientid, |
684e5638 BF |
5815 | &cstate->session->se_client->cl_clientid, |
5816 | sizeof(clientid_t)); | |
5817 | ||
1da177e4 | 5818 | status = nfserr_stale_clientid; |
2c142baa | 5819 | if (STALE_CLIENTID(&lock->lk_new_clientid, nn)) |
1da177e4 | 5820 | goto out; |
1da177e4 | 5821 | |
1da177e4 | 5822 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 5823 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
5824 | lock->lk_new_open_seqid, |
5825 | &lock->lk_new_open_stateid, | |
3320fef1 | 5826 | &open_stp, nn); |
37515177 | 5827 | if (status) |
1da177e4 | 5828 | goto out; |
feb9dad5 | 5829 | mutex_unlock(&open_stp->st_mutex); |
fe0750e5 | 5830 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 5831 | status = nfserr_bad_stateid; |
684e5638 | 5832 | if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
76f6c9e1 | 5833 | &lock->lk_new_clientid)) |
b34f27aa | 5834 | goto out; |
64a284d0 | 5835 | status = lookup_or_create_lock_state(cstate, open_stp, lock, |
5db1c03f | 5836 | &lock_stp, &new); |
3d0fabd5 | 5837 | } else { |
dd453dfd | 5838 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
5839 | lock->lk_old_lock_seqid, |
5840 | &lock->lk_old_lock_stateid, | |
3320fef1 | 5841 | NFS4_LOCK_STID, &lock_stp, nn); |
3d0fabd5 | 5842 | } |
e1aaa891 BF |
5843 | if (status) |
5844 | goto out; | |
64a284d0 | 5845 | lock_sop = lockowner(lock_stp->st_stateowner); |
1da177e4 | 5846 | |
b34f27aa BF |
5847 | lkflg = setlkflg(lock->lk_type); |
5848 | status = nfs4_check_openmode(lock_stp, lkflg); | |
5849 | if (status) | |
5850 | goto out; | |
5851 | ||
0dd395dc | 5852 | status = nfserr_grace; |
3320fef1 | 5853 | if (locks_in_grace(net) && !lock->lk_reclaim) |
0dd395dc N |
5854 | goto out; |
5855 | status = nfserr_no_grace; | |
3320fef1 | 5856 | if (!locks_in_grace(net) && lock->lk_reclaim) |
0dd395dc N |
5857 | goto out; |
5858 | ||
11b9164a | 5859 | fp = lock_stp->st_stid.sc_file; |
1da177e4 | 5860 | switch (lock->lk_type) { |
1da177e4 | 5861 | case NFS4_READW_LT: |
76d348fa JL |
5862 | if (nfsd4_has_session(cstate)) |
5863 | fl_flags |= FL_SLEEP; | |
5864 | /* Fallthrough */ | |
5865 | case NFS4_READ_LT: | |
7214e860 JL |
5866 | spin_lock(&fp->fi_lock); |
5867 | filp = find_readable_file_locked(fp); | |
0997b173 BF |
5868 | if (filp) |
5869 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
7214e860 | 5870 | spin_unlock(&fp->fi_lock); |
76d348fa | 5871 | fl_type = F_RDLCK; |
529d7b2a | 5872 | break; |
1da177e4 | 5873 | case NFS4_WRITEW_LT: |
76d348fa JL |
5874 | if (nfsd4_has_session(cstate)) |
5875 | fl_flags |= FL_SLEEP; | |
5876 | /* Fallthrough */ | |
5877 | case NFS4_WRITE_LT: | |
7214e860 JL |
5878 | spin_lock(&fp->fi_lock); |
5879 | filp = find_writeable_file_locked(fp); | |
0997b173 BF |
5880 | if (filp) |
5881 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
7214e860 | 5882 | spin_unlock(&fp->fi_lock); |
76d348fa | 5883 | fl_type = F_WRLCK; |
529d7b2a | 5884 | break; |
1da177e4 LT |
5885 | default: |
5886 | status = nfserr_inval; | |
5887 | goto out; | |
5888 | } | |
76d348fa | 5889 | |
f9d7562f BF |
5890 | if (!filp) { |
5891 | status = nfserr_openmode; | |
5892 | goto out; | |
5893 | } | |
aef9583b | 5894 | |
76d348fa JL |
5895 | nbl = find_or_allocate_block(lock_sop, &fp->fi_fhandle, nn); |
5896 | if (!nbl) { | |
5897 | dprintk("NFSD: %s: unable to allocate block!\n", __func__); | |
5898 | status = nfserr_jukebox; | |
5899 | goto out; | |
5900 | } | |
5901 | ||
5902 | file_lock = &nbl->nbl_lock; | |
5903 | file_lock->fl_type = fl_type; | |
aef9583b | 5904 | file_lock->fl_owner = (fl_owner_t)lockowner(nfs4_get_stateowner(&lock_sop->lo_owner)); |
21179d81 JL |
5905 | file_lock->fl_pid = current->tgid; |
5906 | file_lock->fl_file = filp; | |
76d348fa | 5907 | file_lock->fl_flags = fl_flags; |
21179d81 JL |
5908 | file_lock->fl_lmops = &nfsd_posix_mng_ops; |
5909 | file_lock->fl_start = lock->lk_offset; | |
5910 | file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); | |
5911 | nfs4_transform_lock_offset(file_lock); | |
5912 | ||
5913 | conflock = locks_alloc_lock(); | |
5914 | if (!conflock) { | |
5915 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
5916 | status = nfserr_jukebox; | |
5917 | goto out; | |
5918 | } | |
1da177e4 | 5919 | |
76d348fa | 5920 | if (fl_flags & FL_SLEEP) { |
7919d0a2 | 5921 | nbl->nbl_time = jiffies; |
0cc11a61 | 5922 | spin_lock(&nn->blocked_locks_lock); |
76d348fa | 5923 | list_add_tail(&nbl->nbl_list, &lock_sop->lo_blocked); |
7919d0a2 | 5924 | list_add_tail(&nbl->nbl_lru, &nn->blocked_locks_lru); |
0cc11a61 | 5925 | spin_unlock(&nn->blocked_locks_lock); |
76d348fa JL |
5926 | } |
5927 | ||
21179d81 | 5928 | err = vfs_lock_file(filp, F_SETLK, file_lock, conflock); |
76d348fa | 5929 | switch (err) { |
1da177e4 | 5930 | case 0: /* success! */ |
9767feb2 | 5931 | nfs4_inc_and_copy_stateid(&lock->lk_resp_stateid, &lock_stp->st_stid); |
b8dd7b9a | 5932 | status = 0; |
eb76b3fd | 5933 | break; |
76d348fa JL |
5934 | case FILE_LOCK_DEFERRED: |
5935 | nbl = NULL; | |
5936 | /* Fallthrough */ | |
5937 | case -EAGAIN: /* conflock holds conflicting lock */ | |
eb76b3fd AA |
5938 | status = nfserr_denied; |
5939 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
21179d81 | 5940 | nfs4_set_lock_denied(conflock, &lock->lk_denied); |
eb76b3fd | 5941 | break; |
76d348fa | 5942 | case -EDEADLK: |
1da177e4 | 5943 | status = nfserr_deadlock; |
eb76b3fd | 5944 | break; |
3e772463 | 5945 | default: |
fd85b817 | 5946 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 5947 | status = nfserrno(err); |
eb76b3fd | 5948 | break; |
1da177e4 | 5949 | } |
1da177e4 | 5950 | out: |
76d348fa JL |
5951 | if (nbl) { |
5952 | /* dequeue it if we queued it before */ | |
5953 | if (fl_flags & FL_SLEEP) { | |
0cc11a61 | 5954 | spin_lock(&nn->blocked_locks_lock); |
76d348fa | 5955 | list_del_init(&nbl->nbl_list); |
7919d0a2 | 5956 | list_del_init(&nbl->nbl_lru); |
0cc11a61 | 5957 | spin_unlock(&nn->blocked_locks_lock); |
76d348fa JL |
5958 | } |
5959 | free_blocked_lock(nbl); | |
5960 | } | |
de18643d TM |
5961 | if (filp) |
5962 | fput(filp); | |
5db1c03f JL |
5963 | if (lock_stp) { |
5964 | /* Bump seqid manually if the 4.0 replay owner is openowner */ | |
5965 | if (cstate->replay_owner && | |
5966 | cstate->replay_owner != &lock_sop->lo_owner && | |
5967 | seqid_mutating_err(ntohl(status))) | |
5968 | lock_sop->lo_owner.so_seqid++; | |
5969 | ||
feb9dad5 | 5970 | mutex_unlock(&lock_stp->st_mutex); |
35a92fe8 | 5971 | |
5db1c03f JL |
5972 | /* |
5973 | * If this is a new, never-before-used stateid, and we are | |
5974 | * returning an error, then just go ahead and release it. | |
5975 | */ | |
5976 | if (status && new) | |
5977 | release_lock_stateid(lock_stp); | |
5978 | ||
3d0fabd5 | 5979 | nfs4_put_stid(&lock_stp->st_stid); |
5db1c03f | 5980 | } |
0667b1e9 TM |
5981 | if (open_stp) |
5982 | nfs4_put_stid(&open_stp->st_stid); | |
9411b1d4 | 5983 | nfsd4_bump_seqid(cstate, status); |
21179d81 JL |
5984 | if (conflock) |
5985 | locks_free_lock(conflock); | |
1da177e4 LT |
5986 | return status; |
5987 | } | |
5988 | ||
55ef1274 BF |
5989 | /* |
5990 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
5991 | * so we do a temporary open here just to get an open file to pass to | |
5992 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
5993 | * inode operation.) | |
5994 | */ | |
04da6e9d | 5995 | static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) |
55ef1274 BF |
5996 | { |
5997 | struct file *file; | |
04da6e9d AV |
5998 | __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); |
5999 | if (!err) { | |
6000 | err = nfserrno(vfs_test_lock(file, lock)); | |
fd891454 | 6001 | fput(file); |
04da6e9d | 6002 | } |
55ef1274 BF |
6003 | return err; |
6004 | } | |
6005 | ||
1da177e4 LT |
6006 | /* |
6007 | * LOCKT operation | |
6008 | */ | |
b37ad28b | 6009 | __be32 |
ca364317 | 6010 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 6011 | union nfsd4_op_u *u) |
1da177e4 | 6012 | { |
eb69853d | 6013 | struct nfsd4_lockt *lockt = &u->lockt; |
21179d81 | 6014 | struct file_lock *file_lock = NULL; |
5db1c03f | 6015 | struct nfs4_lockowner *lo = NULL; |
b37ad28b | 6016 | __be32 status; |
7f2210fa | 6017 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 6018 | |
5ccb0066 | 6019 | if (locks_in_grace(SVC_NET(rqstp))) |
1da177e4 LT |
6020 | return nfserr_grace; |
6021 | ||
6022 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
6023 | return nfserr_inval; | |
6024 | ||
9b2ef62b | 6025 | if (!nfsd4_has_session(cstate)) { |
4b24ca7d | 6026 | status = lookup_clientid(&lockt->lt_clientid, cstate, nn); |
9b2ef62b BF |
6027 | if (status) |
6028 | goto out; | |
6029 | } | |
1da177e4 | 6030 | |
75c096f7 | 6031 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 6032 | goto out; |
1da177e4 | 6033 | |
21179d81 JL |
6034 | file_lock = locks_alloc_lock(); |
6035 | if (!file_lock) { | |
6036 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
6037 | status = nfserr_jukebox; | |
6038 | goto out; | |
6039 | } | |
6cd90662 | 6040 | |
1da177e4 LT |
6041 | switch (lockt->lt_type) { |
6042 | case NFS4_READ_LT: | |
6043 | case NFS4_READW_LT: | |
21179d81 | 6044 | file_lock->fl_type = F_RDLCK; |
1da177e4 LT |
6045 | break; |
6046 | case NFS4_WRITE_LT: | |
6047 | case NFS4_WRITEW_LT: | |
21179d81 | 6048 | file_lock->fl_type = F_WRLCK; |
1da177e4 LT |
6049 | break; |
6050 | default: | |
2fdada03 | 6051 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
6052 | status = nfserr_inval; |
6053 | goto out; | |
6054 | } | |
6055 | ||
c8623999 | 6056 | lo = find_lockowner_str(cstate->clp, &lockt->lt_owner); |
fe0750e5 | 6057 | if (lo) |
21179d81 JL |
6058 | file_lock->fl_owner = (fl_owner_t)lo; |
6059 | file_lock->fl_pid = current->tgid; | |
6060 | file_lock->fl_flags = FL_POSIX; | |
1da177e4 | 6061 | |
21179d81 JL |
6062 | file_lock->fl_start = lockt->lt_offset; |
6063 | file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); | |
1da177e4 | 6064 | |
21179d81 | 6065 | nfs4_transform_lock_offset(file_lock); |
1da177e4 | 6066 | |
21179d81 | 6067 | status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock); |
04da6e9d | 6068 | if (status) |
fd85b817 | 6069 | goto out; |
04da6e9d | 6070 | |
21179d81 | 6071 | if (file_lock->fl_type != F_UNLCK) { |
1da177e4 | 6072 | status = nfserr_denied; |
21179d81 | 6073 | nfs4_set_lock_denied(file_lock, &lockt->lt_denied); |
1da177e4 LT |
6074 | } |
6075 | out: | |
5db1c03f JL |
6076 | if (lo) |
6077 | nfs4_put_stateowner(&lo->lo_owner); | |
21179d81 JL |
6078 | if (file_lock) |
6079 | locks_free_lock(file_lock); | |
1da177e4 LT |
6080 | return status; |
6081 | } | |
6082 | ||
b37ad28b | 6083 | __be32 |
ca364317 | 6084 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 6085 | union nfsd4_op_u *u) |
1da177e4 | 6086 | { |
eb69853d | 6087 | struct nfsd4_locku *locku = &u->locku; |
dcef0413 | 6088 | struct nfs4_ol_stateid *stp; |
1da177e4 | 6089 | struct file *filp = NULL; |
21179d81 | 6090 | struct file_lock *file_lock = NULL; |
b37ad28b | 6091 | __be32 status; |
b8dd7b9a | 6092 | int err; |
3320fef1 SK |
6093 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
6094 | ||
1da177e4 LT |
6095 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", |
6096 | (long long) locku->lu_offset, | |
6097 | (long long) locku->lu_length); | |
6098 | ||
6099 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
6100 | return nfserr_inval; | |
6101 | ||
9072d5c6 | 6102 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
3320fef1 SK |
6103 | &locku->lu_stateid, NFS4_LOCK_STID, |
6104 | &stp, nn); | |
9072d5c6 | 6105 | if (status) |
1da177e4 | 6106 | goto out; |
11b9164a | 6107 | filp = find_any_file(stp->st_stid.sc_file); |
f9d7562f BF |
6108 | if (!filp) { |
6109 | status = nfserr_lock_range; | |
858cc573 | 6110 | goto put_stateid; |
f9d7562f | 6111 | } |
21179d81 JL |
6112 | file_lock = locks_alloc_lock(); |
6113 | if (!file_lock) { | |
6114 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
6115 | status = nfserr_jukebox; | |
de18643d | 6116 | goto fput; |
21179d81 | 6117 | } |
6cd90662 | 6118 | |
21179d81 | 6119 | file_lock->fl_type = F_UNLCK; |
aef9583b | 6120 | file_lock->fl_owner = (fl_owner_t)lockowner(nfs4_get_stateowner(stp->st_stateowner)); |
21179d81 JL |
6121 | file_lock->fl_pid = current->tgid; |
6122 | file_lock->fl_file = filp; | |
6123 | file_lock->fl_flags = FL_POSIX; | |
6124 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
6125 | file_lock->fl_start = locku->lu_offset; | |
6126 | ||
6127 | file_lock->fl_end = last_byte_offset(locku->lu_offset, | |
6128 | locku->lu_length); | |
6129 | nfs4_transform_lock_offset(file_lock); | |
1da177e4 | 6130 | |
21179d81 | 6131 | err = vfs_lock_file(filp, F_SETLK, file_lock, NULL); |
b8dd7b9a | 6132 | if (err) { |
fd85b817 | 6133 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
6134 | goto out_nfserr; |
6135 | } | |
9767feb2 | 6136 | nfs4_inc_and_copy_stateid(&locku->lu_stateid, &stp->st_stid); |
de18643d TM |
6137 | fput: |
6138 | fput(filp); | |
858cc573 | 6139 | put_stateid: |
feb9dad5 | 6140 | mutex_unlock(&stp->st_mutex); |
858cc573 | 6141 | nfs4_put_stid(&stp->st_stid); |
1da177e4 | 6142 | out: |
9411b1d4 | 6143 | nfsd4_bump_seqid(cstate, status); |
21179d81 JL |
6144 | if (file_lock) |
6145 | locks_free_lock(file_lock); | |
1da177e4 LT |
6146 | return status; |
6147 | ||
6148 | out_nfserr: | |
b8dd7b9a | 6149 | status = nfserrno(err); |
de18643d | 6150 | goto fput; |
1da177e4 LT |
6151 | } |
6152 | ||
6153 | /* | |
6154 | * returns | |
f9c00c3a JL |
6155 | * true: locks held by lockowner |
6156 | * false: no locks held by lockowner | |
1da177e4 | 6157 | */ |
f9c00c3a JL |
6158 | static bool |
6159 | check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner) | |
1da177e4 | 6160 | { |
bd61e0a9 | 6161 | struct file_lock *fl; |
f9c00c3a JL |
6162 | int status = false; |
6163 | struct file *filp = find_any_file(fp); | |
6164 | struct inode *inode; | |
bd61e0a9 | 6165 | struct file_lock_context *flctx; |
f9c00c3a JL |
6166 | |
6167 | if (!filp) { | |
6168 | /* Any valid lock stateid should have some sort of access */ | |
6169 | WARN_ON_ONCE(1); | |
6170 | return status; | |
6171 | } | |
6172 | ||
6173 | inode = file_inode(filp); | |
bd61e0a9 JL |
6174 | flctx = inode->i_flctx; |
6175 | ||
6176 | if (flctx && !list_empty_careful(&flctx->flc_posix)) { | |
6109c850 | 6177 | spin_lock(&flctx->flc_lock); |
bd61e0a9 JL |
6178 | list_for_each_entry(fl, &flctx->flc_posix, fl_list) { |
6179 | if (fl->fl_owner == (fl_owner_t)lowner) { | |
6180 | status = true; | |
6181 | break; | |
6182 | } | |
796dadfd | 6183 | } |
6109c850 | 6184 | spin_unlock(&flctx->flc_lock); |
1da177e4 | 6185 | } |
f9c00c3a | 6186 | fput(filp); |
1da177e4 LT |
6187 | return status; |
6188 | } | |
6189 | ||
b37ad28b | 6190 | __be32 |
b591480b BF |
6191 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
6192 | struct nfsd4_compound_state *cstate, | |
eb69853d | 6193 | union nfsd4_op_u *u) |
1da177e4 | 6194 | { |
eb69853d | 6195 | struct nfsd4_release_lockowner *rlockowner = &u->release_lockowner; |
1da177e4 | 6196 | clientid_t *clid = &rlockowner->rl_clientid; |
882e9d25 JL |
6197 | struct nfs4_stateowner *sop; |
6198 | struct nfs4_lockowner *lo = NULL; | |
dcef0413 | 6199 | struct nfs4_ol_stateid *stp; |
1da177e4 | 6200 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
d4f0489f | 6201 | unsigned int hashval = ownerstr_hashval(owner); |
b37ad28b | 6202 | __be32 status; |
7f2210fa | 6203 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
c58c6610 | 6204 | struct nfs4_client *clp; |
88584818 | 6205 | LIST_HEAD (reaplist); |
1da177e4 LT |
6206 | |
6207 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
6208 | clid->cl_boot, clid->cl_id); | |
6209 | ||
4b24ca7d | 6210 | status = lookup_clientid(clid, cstate, nn); |
9b2ef62b | 6211 | if (status) |
51f5e783 | 6212 | return status; |
9b2ef62b | 6213 | |
d4f0489f | 6214 | clp = cstate->clp; |
fd44907c | 6215 | /* Find the matching lock stateowner */ |
d4f0489f | 6216 | spin_lock(&clp->cl_lock); |
882e9d25 | 6217 | list_for_each_entry(sop, &clp->cl_ownerstr_hashtbl[hashval], |
d4f0489f | 6218 | so_strhash) { |
fd44907c | 6219 | |
882e9d25 JL |
6220 | if (sop->so_is_open_owner || !same_owner_str(sop, owner)) |
6221 | continue; | |
fd44907c | 6222 | |
882e9d25 JL |
6223 | /* see if there are still any locks associated with it */ |
6224 | lo = lockowner(sop); | |
6225 | list_for_each_entry(stp, &sop->so_stateids, st_perstateowner) { | |
6226 | if (check_for_locks(stp->st_stid.sc_file, lo)) { | |
6227 | status = nfserr_locks_held; | |
6228 | spin_unlock(&clp->cl_lock); | |
51f5e783 | 6229 | return status; |
882e9d25 | 6230 | } |
5adfd885 | 6231 | } |
882e9d25 | 6232 | |
b5971afa | 6233 | nfs4_get_stateowner(sop); |
882e9d25 | 6234 | break; |
1da177e4 | 6235 | } |
88584818 CL |
6236 | if (!lo) { |
6237 | spin_unlock(&clp->cl_lock); | |
6238 | return status; | |
6239 | } | |
6240 | ||
6241 | unhash_lockowner_locked(lo); | |
6242 | while (!list_empty(&lo->lo_owner.so_stateids)) { | |
6243 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
6244 | struct nfs4_ol_stateid, | |
6245 | st_perstateowner); | |
6246 | WARN_ON(!unhash_lock_stateid(stp)); | |
6247 | put_ol_stateid_locked(stp, &reaplist); | |
6248 | } | |
c58c6610 | 6249 | spin_unlock(&clp->cl_lock); |
88584818 CL |
6250 | free_ol_stateid_reaplist(&reaplist); |
6251 | nfs4_put_stateowner(&lo->lo_owner); | |
6252 | ||
1da177e4 LT |
6253 | return status; |
6254 | } | |
6255 | ||
6256 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 6257 | alloc_reclaim(void) |
1da177e4 | 6258 | { |
a55370a3 | 6259 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
6260 | } |
6261 | ||
0ce0c2b5 | 6262 | bool |
52e19c09 | 6263 | nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn) |
c7b9a459 | 6264 | { |
0ce0c2b5 | 6265 | struct nfs4_client_reclaim *crp; |
c7b9a459 | 6266 | |
52e19c09 | 6267 | crp = nfsd4_find_reclaim_client(name, nn); |
0ce0c2b5 | 6268 | return (crp && crp->cr_clp); |
c7b9a459 N |
6269 | } |
6270 | ||
1da177e4 LT |
6271 | /* |
6272 | * failure => all reset bets are off, nfserr_no_grace... | |
6273 | */ | |
772a9bbb | 6274 | struct nfs4_client_reclaim * |
52e19c09 | 6275 | nfs4_client_to_reclaim(const char *name, struct nfsd_net *nn) |
1da177e4 LT |
6276 | { |
6277 | unsigned int strhashval; | |
772a9bbb | 6278 | struct nfs4_client_reclaim *crp; |
1da177e4 | 6279 | |
a55370a3 N |
6280 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
6281 | crp = alloc_reclaim(); | |
772a9bbb JL |
6282 | if (crp) { |
6283 | strhashval = clientstr_hashval(name); | |
6284 | INIT_LIST_HEAD(&crp->cr_strhash); | |
52e19c09 | 6285 | list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]); |
772a9bbb | 6286 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
0ce0c2b5 | 6287 | crp->cr_clp = NULL; |
52e19c09 | 6288 | nn->reclaim_str_hashtbl_size++; |
772a9bbb JL |
6289 | } |
6290 | return crp; | |
1da177e4 LT |
6291 | } |
6292 | ||
ce30e539 | 6293 | void |
52e19c09 | 6294 | nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn) |
ce30e539 JL |
6295 | { |
6296 | list_del(&crp->cr_strhash); | |
6297 | kfree(crp); | |
52e19c09 | 6298 | nn->reclaim_str_hashtbl_size--; |
ce30e539 JL |
6299 | } |
6300 | ||
2a4317c5 | 6301 | void |
52e19c09 | 6302 | nfs4_release_reclaim(struct nfsd_net *nn) |
1da177e4 LT |
6303 | { |
6304 | struct nfs4_client_reclaim *crp = NULL; | |
6305 | int i; | |
6306 | ||
1da177e4 | 6307 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
52e19c09 SK |
6308 | while (!list_empty(&nn->reclaim_str_hashtbl[i])) { |
6309 | crp = list_entry(nn->reclaim_str_hashtbl[i].next, | |
1da177e4 | 6310 | struct nfs4_client_reclaim, cr_strhash); |
52e19c09 | 6311 | nfs4_remove_reclaim_record(crp, nn); |
1da177e4 LT |
6312 | } |
6313 | } | |
063b0fb9 | 6314 | WARN_ON_ONCE(nn->reclaim_str_hashtbl_size); |
1da177e4 LT |
6315 | } |
6316 | ||
6317 | /* | |
6318 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
2a4317c5 | 6319 | struct nfs4_client_reclaim * |
52e19c09 | 6320 | nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn) |
1da177e4 LT |
6321 | { |
6322 | unsigned int strhashval; | |
1da177e4 LT |
6323 | struct nfs4_client_reclaim *crp = NULL; |
6324 | ||
278c931c | 6325 | dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir); |
1da177e4 | 6326 | |
278c931c | 6327 | strhashval = clientstr_hashval(recdir); |
52e19c09 | 6328 | list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) { |
278c931c | 6329 | if (same_name(crp->cr_recdir, recdir)) { |
1da177e4 LT |
6330 | return crp; |
6331 | } | |
6332 | } | |
6333 | return NULL; | |
6334 | } | |
6335 | ||
6336 | /* | |
6337 | * Called from OPEN. Look for clientid in reclaim list. | |
6338 | */ | |
b37ad28b | 6339 | __be32 |
0fe492db TM |
6340 | nfs4_check_open_reclaim(clientid_t *clid, |
6341 | struct nfsd4_compound_state *cstate, | |
6342 | struct nfsd_net *nn) | |
1da177e4 | 6343 | { |
0fe492db | 6344 | __be32 status; |
a52d726b JL |
6345 | |
6346 | /* find clientid in conf_id_hashtbl */ | |
0fe492db TM |
6347 | status = lookup_clientid(clid, cstate, nn); |
6348 | if (status) | |
a52d726b JL |
6349 | return nfserr_reclaim_bad; |
6350 | ||
3b3e7b72 JL |
6351 | if (test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, &cstate->clp->cl_flags)) |
6352 | return nfserr_no_grace; | |
6353 | ||
0fe492db TM |
6354 | if (nfsd4_client_record_check(cstate->clp)) |
6355 | return nfserr_reclaim_bad; | |
6356 | ||
6357 | return nfs_ok; | |
1da177e4 LT |
6358 | } |
6359 | ||
65178db4 | 6360 | #ifdef CONFIG_NFSD_FAULT_INJECTION |
016200c3 JL |
6361 | static inline void |
6362 | put_client(struct nfs4_client *clp) | |
6363 | { | |
6364 | atomic_dec(&clp->cl_refcount); | |
6365 | } | |
6366 | ||
285abdee JL |
6367 | static struct nfs4_client * |
6368 | nfsd_find_client(struct sockaddr_storage *addr, size_t addr_size) | |
6369 | { | |
6370 | struct nfs4_client *clp; | |
6371 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6372 | nfsd_net_id); | |
6373 | ||
6374 | if (!nfsd_netns_ready(nn)) | |
6375 | return NULL; | |
6376 | ||
6377 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
6378 | if (memcmp(&clp->cl_addr, addr, addr_size) == 0) | |
6379 | return clp; | |
6380 | } | |
6381 | return NULL; | |
6382 | } | |
6383 | ||
7ec0e36f | 6384 | u64 |
285abdee | 6385 | nfsd_inject_print_clients(void) |
7ec0e36f JL |
6386 | { |
6387 | struct nfs4_client *clp; | |
6388 | u64 count = 0; | |
6389 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6390 | nfsd_net_id); | |
6391 | char buf[INET6_ADDRSTRLEN]; | |
6392 | ||
6393 | if (!nfsd_netns_ready(nn)) | |
6394 | return 0; | |
6395 | ||
6396 | spin_lock(&nn->client_lock); | |
6397 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
6398 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); | |
6399 | pr_info("NFS Client: %s\n", buf); | |
6400 | ++count; | |
6401 | } | |
6402 | spin_unlock(&nn->client_lock); | |
6403 | ||
6404 | return count; | |
6405 | } | |
65178db4 | 6406 | |
a0926d15 | 6407 | u64 |
285abdee | 6408 | nfsd_inject_forget_client(struct sockaddr_storage *addr, size_t addr_size) |
a0926d15 JL |
6409 | { |
6410 | u64 count = 0; | |
6411 | struct nfs4_client *clp; | |
6412 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6413 | nfsd_net_id); | |
6414 | ||
6415 | if (!nfsd_netns_ready(nn)) | |
6416 | return count; | |
6417 | ||
6418 | spin_lock(&nn->client_lock); | |
6419 | clp = nfsd_find_client(addr, addr_size); | |
6420 | if (clp) { | |
6421 | if (mark_client_expired_locked(clp) == nfs_ok) | |
6422 | ++count; | |
6423 | else | |
6424 | clp = NULL; | |
6425 | } | |
6426 | spin_unlock(&nn->client_lock); | |
6427 | ||
6428 | if (clp) | |
6429 | expire_client(clp); | |
6430 | ||
6431 | return count; | |
6432 | } | |
6433 | ||
69fc9edf | 6434 | u64 |
285abdee | 6435 | nfsd_inject_forget_clients(u64 max) |
69fc9edf JL |
6436 | { |
6437 | u64 count = 0; | |
6438 | struct nfs4_client *clp, *next; | |
6439 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6440 | nfsd_net_id); | |
6441 | LIST_HEAD(reaplist); | |
6442 | ||
6443 | if (!nfsd_netns_ready(nn)) | |
6444 | return count; | |
6445 | ||
6446 | spin_lock(&nn->client_lock); | |
6447 | list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { | |
6448 | if (mark_client_expired_locked(clp) == nfs_ok) { | |
6449 | list_add(&clp->cl_lru, &reaplist); | |
6450 | if (max != 0 && ++count >= max) | |
6451 | break; | |
6452 | } | |
6453 | } | |
6454 | spin_unlock(&nn->client_lock); | |
6455 | ||
6456 | list_for_each_entry_safe(clp, next, &reaplist, cl_lru) | |
6457 | expire_client(clp); | |
6458 | ||
6459 | return count; | |
6460 | } | |
6461 | ||
184c1847 BS |
6462 | static void nfsd_print_count(struct nfs4_client *clp, unsigned int count, |
6463 | const char *type) | |
6464 | { | |
6465 | char buf[INET6_ADDRSTRLEN]; | |
0a5c33e2 | 6466 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
184c1847 BS |
6467 | printk(KERN_INFO "NFS Client: %s has %u %s\n", buf, count, type); |
6468 | } | |
6469 | ||
016200c3 JL |
6470 | static void |
6471 | nfsd_inject_add_lock_to_list(struct nfs4_ol_stateid *lst, | |
6472 | struct list_head *collect) | |
6473 | { | |
6474 | struct nfs4_client *clp = lst->st_stid.sc_client; | |
6475 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6476 | nfsd_net_id); | |
6477 | ||
6478 | if (!collect) | |
6479 | return; | |
6480 | ||
6481 | lockdep_assert_held(&nn->client_lock); | |
6482 | atomic_inc(&clp->cl_refcount); | |
6483 | list_add(&lst->st_locks, collect); | |
6484 | } | |
6485 | ||
3c87b9b7 | 6486 | static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max, |
3738d50e | 6487 | struct list_head *collect, |
e8568739 | 6488 | bool (*func)(struct nfs4_ol_stateid *)) |
fc29171f BS |
6489 | { |
6490 | struct nfs4_openowner *oop; | |
fc29171f | 6491 | struct nfs4_ol_stateid *stp, *st_next; |
3c87b9b7 | 6492 | struct nfs4_ol_stateid *lst, *lst_next; |
fc29171f BS |
6493 | u64 count = 0; |
6494 | ||
016200c3 | 6495 | spin_lock(&clp->cl_lock); |
fc29171f | 6496 | list_for_each_entry(oop, &clp->cl_openowners, oo_perclient) { |
3c87b9b7 TM |
6497 | list_for_each_entry_safe(stp, st_next, |
6498 | &oop->oo_owner.so_stateids, st_perstateowner) { | |
6499 | list_for_each_entry_safe(lst, lst_next, | |
6500 | &stp->st_locks, st_locks) { | |
3738d50e | 6501 | if (func) { |
e8568739 JL |
6502 | if (func(lst)) |
6503 | nfsd_inject_add_lock_to_list(lst, | |
6504 | collect); | |
3738d50e | 6505 | } |
016200c3 JL |
6506 | ++count; |
6507 | /* | |
6508 | * Despite the fact that these functions deal | |
6509 | * with 64-bit integers for "count", we must | |
6510 | * ensure that it doesn't blow up the | |
6511 | * clp->cl_refcount. Throw a warning if we | |
6512 | * start to approach INT_MAX here. | |
6513 | */ | |
6514 | WARN_ON_ONCE(count == (INT_MAX / 2)); | |
6515 | if (count == max) | |
6516 | goto out; | |
fc29171f BS |
6517 | } |
6518 | } | |
6519 | } | |
016200c3 JL |
6520 | out: |
6521 | spin_unlock(&clp->cl_lock); | |
fc29171f BS |
6522 | |
6523 | return count; | |
6524 | } | |
6525 | ||
016200c3 JL |
6526 | static u64 |
6527 | nfsd_collect_client_locks(struct nfs4_client *clp, struct list_head *collect, | |
6528 | u64 max) | |
fc29171f | 6529 | { |
016200c3 | 6530 | return nfsd_foreach_client_lock(clp, max, collect, unhash_lock_stateid); |
fc29171f BS |
6531 | } |
6532 | ||
016200c3 JL |
6533 | static u64 |
6534 | nfsd_print_client_locks(struct nfs4_client *clp) | |
184c1847 | 6535 | { |
016200c3 | 6536 | u64 count = nfsd_foreach_client_lock(clp, 0, NULL, NULL); |
184c1847 BS |
6537 | nfsd_print_count(clp, count, "locked files"); |
6538 | return count; | |
6539 | } | |
6540 | ||
016200c3 | 6541 | u64 |
285abdee | 6542 | nfsd_inject_print_locks(void) |
016200c3 JL |
6543 | { |
6544 | struct nfs4_client *clp; | |
6545 | u64 count = 0; | |
6546 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6547 | nfsd_net_id); | |
6548 | ||
6549 | if (!nfsd_netns_ready(nn)) | |
6550 | return 0; | |
6551 | ||
6552 | spin_lock(&nn->client_lock); | |
6553 | list_for_each_entry(clp, &nn->client_lru, cl_lru) | |
6554 | count += nfsd_print_client_locks(clp); | |
6555 | spin_unlock(&nn->client_lock); | |
6556 | ||
6557 | return count; | |
6558 | } | |
6559 | ||
6560 | static void | |
6561 | nfsd_reap_locks(struct list_head *reaplist) | |
6562 | { | |
6563 | struct nfs4_client *clp; | |
6564 | struct nfs4_ol_stateid *stp, *next; | |
6565 | ||
6566 | list_for_each_entry_safe(stp, next, reaplist, st_locks) { | |
6567 | list_del_init(&stp->st_locks); | |
6568 | clp = stp->st_stid.sc_client; | |
6569 | nfs4_put_stid(&stp->st_stid); | |
6570 | put_client(clp); | |
6571 | } | |
6572 | } | |
6573 | ||
6574 | u64 | |
285abdee | 6575 | nfsd_inject_forget_client_locks(struct sockaddr_storage *addr, size_t addr_size) |
016200c3 JL |
6576 | { |
6577 | unsigned int count = 0; | |
6578 | struct nfs4_client *clp; | |
6579 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6580 | nfsd_net_id); | |
6581 | LIST_HEAD(reaplist); | |
6582 | ||
6583 | if (!nfsd_netns_ready(nn)) | |
6584 | return count; | |
6585 | ||
6586 | spin_lock(&nn->client_lock); | |
6587 | clp = nfsd_find_client(addr, addr_size); | |
6588 | if (clp) | |
6589 | count = nfsd_collect_client_locks(clp, &reaplist, 0); | |
6590 | spin_unlock(&nn->client_lock); | |
6591 | nfsd_reap_locks(&reaplist); | |
6592 | return count; | |
6593 | } | |
6594 | ||
6595 | u64 | |
285abdee | 6596 | nfsd_inject_forget_locks(u64 max) |
016200c3 JL |
6597 | { |
6598 | u64 count = 0; | |
6599 | struct nfs4_client *clp; | |
6600 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6601 | nfsd_net_id); | |
6602 | LIST_HEAD(reaplist); | |
6603 | ||
6604 | if (!nfsd_netns_ready(nn)) | |
6605 | return count; | |
6606 | ||
6607 | spin_lock(&nn->client_lock); | |
6608 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
6609 | count += nfsd_collect_client_locks(clp, &reaplist, max - count); | |
6610 | if (max != 0 && count >= max) | |
6611 | break; | |
6612 | } | |
6613 | spin_unlock(&nn->client_lock); | |
6614 | nfsd_reap_locks(&reaplist); | |
6615 | return count; | |
6616 | } | |
6617 | ||
82e05efa JL |
6618 | static u64 |
6619 | nfsd_foreach_client_openowner(struct nfs4_client *clp, u64 max, | |
6620 | struct list_head *collect, | |
6621 | void (*func)(struct nfs4_openowner *)) | |
4dbdbda8 BS |
6622 | { |
6623 | struct nfs4_openowner *oop, *next; | |
82e05efa JL |
6624 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, |
6625 | nfsd_net_id); | |
4dbdbda8 BS |
6626 | u64 count = 0; |
6627 | ||
82e05efa JL |
6628 | lockdep_assert_held(&nn->client_lock); |
6629 | ||
6630 | spin_lock(&clp->cl_lock); | |
4dbdbda8 | 6631 | list_for_each_entry_safe(oop, next, &clp->cl_openowners, oo_perclient) { |
82e05efa | 6632 | if (func) { |
4dbdbda8 | 6633 | func(oop); |
82e05efa JL |
6634 | if (collect) { |
6635 | atomic_inc(&clp->cl_refcount); | |
6636 | list_add(&oop->oo_perclient, collect); | |
6637 | } | |
6638 | } | |
6639 | ++count; | |
6640 | /* | |
6641 | * Despite the fact that these functions deal with | |
6642 | * 64-bit integers for "count", we must ensure that | |
6643 | * it doesn't blow up the clp->cl_refcount. Throw a | |
6644 | * warning if we start to approach INT_MAX here. | |
6645 | */ | |
6646 | WARN_ON_ONCE(count == (INT_MAX / 2)); | |
6647 | if (count == max) | |
4dbdbda8 BS |
6648 | break; |
6649 | } | |
82e05efa JL |
6650 | spin_unlock(&clp->cl_lock); |
6651 | ||
6652 | return count; | |
6653 | } | |
6654 | ||
6655 | static u64 | |
6656 | nfsd_print_client_openowners(struct nfs4_client *clp) | |
6657 | { | |
6658 | u64 count = nfsd_foreach_client_openowner(clp, 0, NULL, NULL); | |
6659 | ||
6660 | nfsd_print_count(clp, count, "openowners"); | |
6661 | return count; | |
6662 | } | |
6663 | ||
6664 | static u64 | |
6665 | nfsd_collect_client_openowners(struct nfs4_client *clp, | |
6666 | struct list_head *collect, u64 max) | |
6667 | { | |
6668 | return nfsd_foreach_client_openowner(clp, max, collect, | |
6669 | unhash_openowner_locked); | |
6670 | } | |
6671 | ||
6672 | u64 | |
285abdee | 6673 | nfsd_inject_print_openowners(void) |
82e05efa JL |
6674 | { |
6675 | struct nfs4_client *clp; | |
6676 | u64 count = 0; | |
6677 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6678 | nfsd_net_id); | |
6679 | ||
6680 | if (!nfsd_netns_ready(nn)) | |
6681 | return 0; | |
6682 | ||
6683 | spin_lock(&nn->client_lock); | |
6684 | list_for_each_entry(clp, &nn->client_lru, cl_lru) | |
6685 | count += nfsd_print_client_openowners(clp); | |
6686 | spin_unlock(&nn->client_lock); | |
4dbdbda8 BS |
6687 | |
6688 | return count; | |
6689 | } | |
6690 | ||
82e05efa JL |
6691 | static void |
6692 | nfsd_reap_openowners(struct list_head *reaplist) | |
6693 | { | |
6694 | struct nfs4_client *clp; | |
6695 | struct nfs4_openowner *oop, *next; | |
6696 | ||
6697 | list_for_each_entry_safe(oop, next, reaplist, oo_perclient) { | |
6698 | list_del_init(&oop->oo_perclient); | |
6699 | clp = oop->oo_owner.so_client; | |
6700 | release_openowner(oop); | |
6701 | put_client(clp); | |
6702 | } | |
6703 | } | |
6704 | ||
6705 | u64 | |
285abdee JL |
6706 | nfsd_inject_forget_client_openowners(struct sockaddr_storage *addr, |
6707 | size_t addr_size) | |
4dbdbda8 | 6708 | { |
82e05efa JL |
6709 | unsigned int count = 0; |
6710 | struct nfs4_client *clp; | |
6711 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6712 | nfsd_net_id); | |
6713 | LIST_HEAD(reaplist); | |
6714 | ||
6715 | if (!nfsd_netns_ready(nn)) | |
6716 | return count; | |
6717 | ||
6718 | spin_lock(&nn->client_lock); | |
6719 | clp = nfsd_find_client(addr, addr_size); | |
6720 | if (clp) | |
6721 | count = nfsd_collect_client_openowners(clp, &reaplist, 0); | |
6722 | spin_unlock(&nn->client_lock); | |
6723 | nfsd_reap_openowners(&reaplist); | |
6724 | return count; | |
4dbdbda8 BS |
6725 | } |
6726 | ||
82e05efa | 6727 | u64 |
285abdee | 6728 | nfsd_inject_forget_openowners(u64 max) |
184c1847 | 6729 | { |
82e05efa JL |
6730 | u64 count = 0; |
6731 | struct nfs4_client *clp; | |
6732 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6733 | nfsd_net_id); | |
6734 | LIST_HEAD(reaplist); | |
6735 | ||
6736 | if (!nfsd_netns_ready(nn)) | |
6737 | return count; | |
6738 | ||
6739 | spin_lock(&nn->client_lock); | |
6740 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
6741 | count += nfsd_collect_client_openowners(clp, &reaplist, | |
6742 | max - count); | |
6743 | if (max != 0 && count >= max) | |
6744 | break; | |
6745 | } | |
6746 | spin_unlock(&nn->client_lock); | |
6747 | nfsd_reap_openowners(&reaplist); | |
184c1847 BS |
6748 | return count; |
6749 | } | |
6750 | ||
269de30f BS |
6751 | static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max, |
6752 | struct list_head *victims) | |
6753 | { | |
6754 | struct nfs4_delegation *dp, *next; | |
98d5c7c5 JL |
6755 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, |
6756 | nfsd_net_id); | |
269de30f BS |
6757 | u64 count = 0; |
6758 | ||
98d5c7c5 JL |
6759 | lockdep_assert_held(&nn->client_lock); |
6760 | ||
6761 | spin_lock(&state_lock); | |
269de30f | 6762 | list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) { |
dff1399f JL |
6763 | if (victims) { |
6764 | /* | |
6765 | * It's not safe to mess with delegations that have a | |
6766 | * non-zero dl_time. They might have already been broken | |
6767 | * and could be processed by the laundromat outside of | |
6768 | * the state_lock. Just leave them be. | |
6769 | */ | |
6770 | if (dp->dl_time != 0) | |
6771 | continue; | |
6772 | ||
98d5c7c5 | 6773 | atomic_inc(&clp->cl_refcount); |
3fcbbd24 | 6774 | WARN_ON(!unhash_delegation_locked(dp)); |
42690676 | 6775 | list_add(&dp->dl_recall_lru, victims); |
dff1399f | 6776 | } |
98d5c7c5 JL |
6777 | ++count; |
6778 | /* | |
6779 | * Despite the fact that these functions deal with | |
6780 | * 64-bit integers for "count", we must ensure that | |
6781 | * it doesn't blow up the clp->cl_refcount. Throw a | |
6782 | * warning if we start to approach INT_MAX here. | |
6783 | */ | |
6784 | WARN_ON_ONCE(count == (INT_MAX / 2)); | |
6785 | if (count == max) | |
269de30f BS |
6786 | break; |
6787 | } | |
98d5c7c5 | 6788 | spin_unlock(&state_lock); |
269de30f BS |
6789 | return count; |
6790 | } | |
6791 | ||
98d5c7c5 JL |
6792 | static u64 |
6793 | nfsd_print_client_delegations(struct nfs4_client *clp) | |
269de30f | 6794 | { |
98d5c7c5 | 6795 | u64 count = nfsd_find_all_delegations(clp, 0, NULL); |
269de30f | 6796 | |
98d5c7c5 JL |
6797 | nfsd_print_count(clp, count, "delegations"); |
6798 | return count; | |
6799 | } | |
6800 | ||
6801 | u64 | |
285abdee | 6802 | nfsd_inject_print_delegations(void) |
98d5c7c5 JL |
6803 | { |
6804 | struct nfs4_client *clp; | |
6805 | u64 count = 0; | |
6806 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6807 | nfsd_net_id); | |
6808 | ||
6809 | if (!nfsd_netns_ready(nn)) | |
6810 | return 0; | |
269de30f | 6811 | |
98d5c7c5 JL |
6812 | spin_lock(&nn->client_lock); |
6813 | list_for_each_entry(clp, &nn->client_lru, cl_lru) | |
6814 | count += nfsd_print_client_delegations(clp); | |
6815 | spin_unlock(&nn->client_lock); | |
6816 | ||
6817 | return count; | |
6818 | } | |
6819 | ||
6820 | static void | |
6821 | nfsd_forget_delegations(struct list_head *reaplist) | |
6822 | { | |
6823 | struct nfs4_client *clp; | |
6824 | struct nfs4_delegation *dp, *next; | |
6825 | ||
6826 | list_for_each_entry_safe(dp, next, reaplist, dl_recall_lru) { | |
2d4a532d | 6827 | list_del_init(&dp->dl_recall_lru); |
98d5c7c5 | 6828 | clp = dp->dl_stid.sc_client; |
3bd64a5b | 6829 | revoke_delegation(dp); |
98d5c7c5 | 6830 | put_client(clp); |
2d4a532d | 6831 | } |
98d5c7c5 JL |
6832 | } |
6833 | ||
6834 | u64 | |
285abdee JL |
6835 | nfsd_inject_forget_client_delegations(struct sockaddr_storage *addr, |
6836 | size_t addr_size) | |
98d5c7c5 JL |
6837 | { |
6838 | u64 count = 0; | |
6839 | struct nfs4_client *clp; | |
6840 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6841 | nfsd_net_id); | |
6842 | LIST_HEAD(reaplist); | |
6843 | ||
6844 | if (!nfsd_netns_ready(nn)) | |
6845 | return count; | |
6846 | ||
6847 | spin_lock(&nn->client_lock); | |
6848 | clp = nfsd_find_client(addr, addr_size); | |
6849 | if (clp) | |
6850 | count = nfsd_find_all_delegations(clp, 0, &reaplist); | |
6851 | spin_unlock(&nn->client_lock); | |
6852 | ||
6853 | nfsd_forget_delegations(&reaplist); | |
6854 | return count; | |
6855 | } | |
269de30f | 6856 | |
98d5c7c5 | 6857 | u64 |
285abdee | 6858 | nfsd_inject_forget_delegations(u64 max) |
98d5c7c5 JL |
6859 | { |
6860 | u64 count = 0; | |
6861 | struct nfs4_client *clp; | |
6862 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6863 | nfsd_net_id); | |
6864 | LIST_HEAD(reaplist); | |
6865 | ||
6866 | if (!nfsd_netns_ready(nn)) | |
6867 | return count; | |
6868 | ||
6869 | spin_lock(&nn->client_lock); | |
6870 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
6871 | count += nfsd_find_all_delegations(clp, max - count, &reaplist); | |
6872 | if (max != 0 && count >= max) | |
6873 | break; | |
6874 | } | |
6875 | spin_unlock(&nn->client_lock); | |
6876 | nfsd_forget_delegations(&reaplist); | |
269de30f BS |
6877 | return count; |
6878 | } | |
6879 | ||
98d5c7c5 JL |
6880 | static void |
6881 | nfsd_recall_delegations(struct list_head *reaplist) | |
269de30f | 6882 | { |
98d5c7c5 JL |
6883 | struct nfs4_client *clp; |
6884 | struct nfs4_delegation *dp, *next; | |
269de30f | 6885 | |
98d5c7c5 | 6886 | list_for_each_entry_safe(dp, next, reaplist, dl_recall_lru) { |
dff1399f | 6887 | list_del_init(&dp->dl_recall_lru); |
98d5c7c5 JL |
6888 | clp = dp->dl_stid.sc_client; |
6889 | /* | |
6890 | * We skipped all entries that had a zero dl_time before, | |
6891 | * so we can now reset the dl_time back to 0. If a delegation | |
6892 | * break comes in now, then it won't make any difference since | |
6893 | * we're recalling it either way. | |
6894 | */ | |
6895 | spin_lock(&state_lock); | |
dff1399f | 6896 | dp->dl_time = 0; |
98d5c7c5 | 6897 | spin_unlock(&state_lock); |
269de30f | 6898 | nfsd_break_one_deleg(dp); |
98d5c7c5 | 6899 | put_client(clp); |
dff1399f | 6900 | } |
98d5c7c5 | 6901 | } |
269de30f | 6902 | |
98d5c7c5 | 6903 | u64 |
285abdee | 6904 | nfsd_inject_recall_client_delegations(struct sockaddr_storage *addr, |
98d5c7c5 JL |
6905 | size_t addr_size) |
6906 | { | |
6907 | u64 count = 0; | |
6908 | struct nfs4_client *clp; | |
6909 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6910 | nfsd_net_id); | |
6911 | LIST_HEAD(reaplist); | |
6912 | ||
6913 | if (!nfsd_netns_ready(nn)) | |
6914 | return count; | |
6915 | ||
6916 | spin_lock(&nn->client_lock); | |
6917 | clp = nfsd_find_client(addr, addr_size); | |
6918 | if (clp) | |
6919 | count = nfsd_find_all_delegations(clp, 0, &reaplist); | |
6920 | spin_unlock(&nn->client_lock); | |
6921 | ||
6922 | nfsd_recall_delegations(&reaplist); | |
269de30f BS |
6923 | return count; |
6924 | } | |
6925 | ||
98d5c7c5 | 6926 | u64 |
285abdee | 6927 | nfsd_inject_recall_delegations(u64 max) |
184c1847 BS |
6928 | { |
6929 | u64 count = 0; | |
98d5c7c5 JL |
6930 | struct nfs4_client *clp, *next; |
6931 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6932 | nfsd_net_id); | |
6933 | LIST_HEAD(reaplist); | |
184c1847 | 6934 | |
98d5c7c5 JL |
6935 | if (!nfsd_netns_ready(nn)) |
6936 | return count; | |
184c1847 | 6937 | |
98d5c7c5 JL |
6938 | spin_lock(&nn->client_lock); |
6939 | list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { | |
6940 | count += nfsd_find_all_delegations(clp, max - count, &reaplist); | |
6941 | if (max != 0 && ++count >= max) | |
6942 | break; | |
6943 | } | |
6944 | spin_unlock(&nn->client_lock); | |
6945 | nfsd_recall_delegations(&reaplist); | |
184c1847 BS |
6946 | return count; |
6947 | } | |
65178db4 BS |
6948 | #endif /* CONFIG_NFSD_FAULT_INJECTION */ |
6949 | ||
c2f1a551 MS |
6950 | /* |
6951 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
6952 | * client may quite reasonably hang on to a delegation as long as it has | |
6953 | * the inode cached. This becomes an obvious problem the first time a | |
6954 | * client's inode cache approaches the size of the server's total memory. | |
6955 | * | |
6956 | * For now we avoid this problem by imposing a hard limit on the number | |
6957 | * of delegations, which varies according to the server's memory size. | |
6958 | */ | |
6959 | static void | |
6960 | set_max_delegations(void) | |
6961 | { | |
6962 | /* | |
6963 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
6964 | * estimates suggest that in the worst case (where every delegation | |
6965 | * is for a different inode), a delegation could take about 1.5K, | |
6966 | * giving a worst case usage of about 6% of memory. | |
6967 | */ | |
6968 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
6969 | } | |
6970 | ||
d85ed443 | 6971 | static int nfs4_state_create_net(struct net *net) |
8daae4dc SK |
6972 | { |
6973 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
6974 | int i; | |
6975 | ||
6976 | nn->conf_id_hashtbl = kmalloc(sizeof(struct list_head) * | |
6977 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
6978 | if (!nn->conf_id_hashtbl) | |
382a62e7 | 6979 | goto err; |
0a7ec377 SK |
6980 | nn->unconf_id_hashtbl = kmalloc(sizeof(struct list_head) * |
6981 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
6982 | if (!nn->unconf_id_hashtbl) | |
6983 | goto err_unconf_id; | |
1872de0e SK |
6984 | nn->sessionid_hashtbl = kmalloc(sizeof(struct list_head) * |
6985 | SESSION_HASH_SIZE, GFP_KERNEL); | |
6986 | if (!nn->sessionid_hashtbl) | |
6987 | goto err_sessionid; | |
8daae4dc | 6988 | |
382a62e7 | 6989 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
8daae4dc | 6990 | INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]); |
0a7ec377 | 6991 | INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]); |
382a62e7 | 6992 | } |
1872de0e SK |
6993 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
6994 | INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]); | |
382a62e7 | 6995 | nn->conf_name_tree = RB_ROOT; |
a99454aa | 6996 | nn->unconf_name_tree = RB_ROOT; |
5ed58bb2 | 6997 | INIT_LIST_HEAD(&nn->client_lru); |
73758fed | 6998 | INIT_LIST_HEAD(&nn->close_lru); |
e8c69d17 | 6999 | INIT_LIST_HEAD(&nn->del_recall_lru); |
c9a49628 | 7000 | spin_lock_init(&nn->client_lock); |
8daae4dc | 7001 | |
0cc11a61 JL |
7002 | spin_lock_init(&nn->blocked_locks_lock); |
7003 | INIT_LIST_HEAD(&nn->blocked_locks_lru); | |
7004 | ||
09121281 | 7005 | INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main); |
d85ed443 | 7006 | get_net(net); |
09121281 | 7007 | |
8daae4dc | 7008 | return 0; |
382a62e7 | 7009 | |
1872de0e | 7010 | err_sessionid: |
9b531137 | 7011 | kfree(nn->unconf_id_hashtbl); |
0a7ec377 SK |
7012 | err_unconf_id: |
7013 | kfree(nn->conf_id_hashtbl); | |
382a62e7 SK |
7014 | err: |
7015 | return -ENOMEM; | |
8daae4dc SK |
7016 | } |
7017 | ||
7018 | static void | |
4dce0ac9 | 7019 | nfs4_state_destroy_net(struct net *net) |
8daae4dc SK |
7020 | { |
7021 | int i; | |
7022 | struct nfs4_client *clp = NULL; | |
7023 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
7024 | ||
7025 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { | |
7026 | while (!list_empty(&nn->conf_id_hashtbl[i])) { | |
7027 | clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
7028 | destroy_client(clp); | |
7029 | } | |
7030 | } | |
a99454aa | 7031 | |
2b905635 KM |
7032 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
7033 | while (!list_empty(&nn->unconf_id_hashtbl[i])) { | |
7034 | clp = list_entry(nn->unconf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
7035 | destroy_client(clp); | |
7036 | } | |
a99454aa SK |
7037 | } |
7038 | ||
1872de0e | 7039 | kfree(nn->sessionid_hashtbl); |
0a7ec377 | 7040 | kfree(nn->unconf_id_hashtbl); |
8daae4dc | 7041 | kfree(nn->conf_id_hashtbl); |
4dce0ac9 | 7042 | put_net(net); |
8daae4dc SK |
7043 | } |
7044 | ||
f252bc68 | 7045 | int |
d85ed443 | 7046 | nfs4_state_start_net(struct net *net) |
ac4d8ff2 | 7047 | { |
5e1533c7 | 7048 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b5a1a81e BF |
7049 | int ret; |
7050 | ||
d85ed443 | 7051 | ret = nfs4_state_create_net(net); |
8daae4dc SK |
7052 | if (ret) |
7053 | return ret; | |
2c142baa | 7054 | nn->boot_time = get_seconds(); |
a51c84ed | 7055 | nn->grace_ended = false; |
c87fb4a3 | 7056 | nn->nfsd4_manager.block_opens = true; |
d4318acd JL |
7057 | locks_start_grace(net, &nn->nfsd4_manager); |
7058 | nfsd4_client_tracking_init(net); | |
d85ed443 | 7059 | printk(KERN_INFO "NFSD: starting %ld-second grace period (net %p)\n", |
5284b44e SK |
7060 | nn->nfsd4_grace, net); |
7061 | queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ); | |
d85ed443 SK |
7062 | return 0; |
7063 | } | |
7064 | ||
7065 | /* initialization to perform when the nfsd service is started: */ | |
7066 | ||
7067 | int | |
7068 | nfs4_state_start(void) | |
7069 | { | |
7070 | int ret; | |
7071 | ||
b5a1a81e | 7072 | ret = set_callback_cred(); |
d85ed443 | 7073 | if (ret) |
f7d1ddbe KM |
7074 | return ret; |
7075 | ||
51a54568 | 7076 | laundry_wq = alloc_workqueue("%s", WQ_UNBOUND, 0, "nfsd4"); |
a6d6b781 JL |
7077 | if (laundry_wq == NULL) { |
7078 | ret = -ENOMEM; | |
f7d1ddbe | 7079 | goto out_cleanup_cred; |
a6d6b781 | 7080 | } |
b5a1a81e BF |
7081 | ret = nfsd4_create_callback_queue(); |
7082 | if (ret) | |
7083 | goto out_free_laundry; | |
09121281 | 7084 | |
c2f1a551 | 7085 | set_max_delegations(); |
b5a1a81e | 7086 | return 0; |
d85ed443 | 7087 | |
b5a1a81e BF |
7088 | out_free_laundry: |
7089 | destroy_workqueue(laundry_wq); | |
f7d1ddbe KM |
7090 | out_cleanup_cred: |
7091 | cleanup_callback_cred(); | |
b5a1a81e | 7092 | return ret; |
1da177e4 LT |
7093 | } |
7094 | ||
f252bc68 | 7095 | void |
4dce0ac9 | 7096 | nfs4_state_shutdown_net(struct net *net) |
1da177e4 | 7097 | { |
1da177e4 | 7098 | struct nfs4_delegation *dp = NULL; |
1da177e4 | 7099 | struct list_head *pos, *next, reaplist; |
4dce0ac9 | 7100 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
7919d0a2 | 7101 | struct nfsd4_blocked_lock *nbl; |
1da177e4 | 7102 | |
4dce0ac9 SK |
7103 | cancel_delayed_work_sync(&nn->laundromat_work); |
7104 | locks_end_grace(&nn->nfsd4_manager); | |
ac55fdc4 | 7105 | |
1da177e4 | 7106 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 7107 | spin_lock(&state_lock); |
e8c69d17 | 7108 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 | 7109 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
3fcbbd24 | 7110 | WARN_ON(!unhash_delegation_locked(dp)); |
42690676 | 7111 | list_add(&dp->dl_recall_lru, &reaplist); |
1da177e4 | 7112 | } |
cdc97505 | 7113 | spin_unlock(&state_lock); |
1da177e4 LT |
7114 | list_for_each_safe(pos, next, &reaplist) { |
7115 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
42690676 | 7116 | list_del_init(&dp->dl_recall_lru); |
8287f009 | 7117 | put_clnt_odstate(dp->dl_clnt_odstate); |
afbda402 | 7118 | nfs4_put_deleg_lease(dp->dl_stid.sc_file); |
6011695d | 7119 | nfs4_put_stid(&dp->dl_stid); |
1da177e4 LT |
7120 | } |
7121 | ||
7919d0a2 | 7122 | BUG_ON(!list_empty(&reaplist)); |
0cc11a61 | 7123 | spin_lock(&nn->blocked_locks_lock); |
7919d0a2 JL |
7124 | while (!list_empty(&nn->blocked_locks_lru)) { |
7125 | nbl = list_first_entry(&nn->blocked_locks_lru, | |
7126 | struct nfsd4_blocked_lock, nbl_lru); | |
7127 | list_move(&nbl->nbl_lru, &reaplist); | |
7128 | list_del_init(&nbl->nbl_list); | |
7129 | } | |
0cc11a61 | 7130 | spin_unlock(&nn->blocked_locks_lock); |
7919d0a2 JL |
7131 | |
7132 | while (!list_empty(&reaplist)) { | |
7133 | nbl = list_first_entry(&nn->blocked_locks_lru, | |
7134 | struct nfsd4_blocked_lock, nbl_lru); | |
7135 | list_del_init(&nbl->nbl_lru); | |
7136 | posix_unblock_lock(&nbl->nbl_lock); | |
7137 | free_blocked_lock(nbl); | |
7138 | } | |
7139 | ||
3320fef1 | 7140 | nfsd4_client_tracking_exit(net); |
4dce0ac9 | 7141 | nfs4_state_destroy_net(net); |
1da177e4 LT |
7142 | } |
7143 | ||
7144 | void | |
7145 | nfs4_state_shutdown(void) | |
7146 | { | |
5e8d5c29 | 7147 | destroy_workqueue(laundry_wq); |
c3935e30 | 7148 | nfsd4_destroy_callback_queue(); |
f7d1ddbe | 7149 | cleanup_callback_cred(); |
1da177e4 | 7150 | } |
8b70484c TM |
7151 | |
7152 | static void | |
7153 | get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
7154 | { | |
37c593c5 TM |
7155 | if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) |
7156 | memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); | |
8b70484c TM |
7157 | } |
7158 | ||
7159 | static void | |
7160 | put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
7161 | { | |
37c593c5 TM |
7162 | if (cstate->minorversion) { |
7163 | memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); | |
7164 | SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
7165 | } | |
7166 | } | |
7167 | ||
7168 | void | |
7169 | clear_current_stateid(struct nfsd4_compound_state *cstate) | |
7170 | { | |
7171 | CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
8b70484c TM |
7172 | } |
7173 | ||
62cd4a59 TM |
7174 | /* |
7175 | * functions to set current state id | |
7176 | */ | |
9428fe1a | 7177 | void |
b60e9859 CH |
7178 | nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, |
7179 | union nfsd4_op_u *u) | |
9428fe1a | 7180 | { |
b60e9859 | 7181 | put_stateid(cstate, &u->open_downgrade.od_stateid); |
9428fe1a TM |
7182 | } |
7183 | ||
8b70484c | 7184 | void |
b60e9859 CH |
7185 | nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, |
7186 | union nfsd4_op_u *u) | |
8b70484c | 7187 | { |
b60e9859 | 7188 | put_stateid(cstate, &u->open.op_stateid); |
8b70484c TM |
7189 | } |
7190 | ||
62cd4a59 | 7191 | void |
b60e9859 CH |
7192 | nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, |
7193 | union nfsd4_op_u *u) | |
62cd4a59 | 7194 | { |
b60e9859 | 7195 | put_stateid(cstate, &u->close.cl_stateid); |
62cd4a59 TM |
7196 | } |
7197 | ||
7198 | void | |
b60e9859 CH |
7199 | nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, |
7200 | union nfsd4_op_u *u) | |
62cd4a59 | 7201 | { |
b60e9859 | 7202 | put_stateid(cstate, &u->lock.lk_resp_stateid); |
62cd4a59 TM |
7203 | } |
7204 | ||
7205 | /* | |
7206 | * functions to consume current state id | |
7207 | */ | |
1e97b519 | 7208 | |
9428fe1a | 7209 | void |
57832e7b CH |
7210 | nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, |
7211 | union nfsd4_op_u *u) | |
9428fe1a | 7212 | { |
57832e7b | 7213 | get_stateid(cstate, &u->open_downgrade.od_stateid); |
9428fe1a TM |
7214 | } |
7215 | ||
7216 | void | |
57832e7b CH |
7217 | nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, |
7218 | union nfsd4_op_u *u) | |
9428fe1a | 7219 | { |
57832e7b | 7220 | get_stateid(cstate, &u->delegreturn.dr_stateid); |
9428fe1a TM |
7221 | } |
7222 | ||
1e97b519 | 7223 | void |
57832e7b CH |
7224 | nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, |
7225 | union nfsd4_op_u *u) | |
1e97b519 | 7226 | { |
57832e7b | 7227 | get_stateid(cstate, &u->free_stateid.fr_stateid); |
1e97b519 TM |
7228 | } |
7229 | ||
7230 | void | |
57832e7b CH |
7231 | nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, |
7232 | union nfsd4_op_u *u) | |
1e97b519 | 7233 | { |
57832e7b | 7234 | get_stateid(cstate, &u->setattr.sa_stateid); |
1e97b519 TM |
7235 | } |
7236 | ||
8b70484c | 7237 | void |
57832e7b CH |
7238 | nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, |
7239 | union nfsd4_op_u *u) | |
8b70484c | 7240 | { |
57832e7b | 7241 | get_stateid(cstate, &u->close.cl_stateid); |
8b70484c TM |
7242 | } |
7243 | ||
7244 | void | |
57832e7b CH |
7245 | nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, |
7246 | union nfsd4_op_u *u) | |
8b70484c | 7247 | { |
57832e7b | 7248 | get_stateid(cstate, &u->locku.lu_stateid); |
8b70484c | 7249 | } |
30813e27 TM |
7250 | |
7251 | void | |
57832e7b CH |
7252 | nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, |
7253 | union nfsd4_op_u *u) | |
30813e27 | 7254 | { |
57832e7b | 7255 | get_stateid(cstate, &u->read.rd_stateid); |
30813e27 TM |
7256 | } |
7257 | ||
7258 | void | |
57832e7b CH |
7259 | nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, |
7260 | union nfsd4_op_u *u) | |
30813e27 | 7261 | { |
57832e7b | 7262 | get_stateid(cstate, &u->write.wr_stateid); |
30813e27 | 7263 | } |