Commit | Line | Data |
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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (c) 2001 The Regents of the University of Michigan. |
3 | * All rights reserved. | |
4 | * | |
5 | * Kendrick Smith <kmsmith@umich.edu> | |
6 | * Andy Adamson <kandros@umich.edu> | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * | |
12 | * 1. Redistributions of source code must retain the above copyright | |
13 | * notice, this list of conditions and the following disclaimer. | |
14 | * 2. Redistributions in binary form must reproduce the above copyright | |
15 | * notice, this list of conditions and the following disclaimer in the | |
16 | * documentation and/or other materials provided with the distribution. | |
17 | * 3. Neither the name of the University nor the names of its | |
18 | * contributors may be used to endorse or promote products derived | |
19 | * from this software without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
22 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
23 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
24 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
26 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
27 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
28 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
29 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
30 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
31 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
32 | * | |
33 | */ | |
34 | ||
aceaf78d | 35 | #include <linux/file.h> |
b89f4321 | 36 | #include <linux/fs.h> |
5a0e3ad6 | 37 | #include <linux/slab.h> |
0964a3d3 | 38 | #include <linux/namei.h> |
c2f1a551 | 39 | #include <linux/swap.h> |
17456804 | 40 | #include <linux/pagemap.h> |
7df302f7 | 41 | #include <linux/ratelimit.h> |
68e76ad0 | 42 | #include <linux/sunrpc/svcauth_gss.h> |
5976687a | 43 | #include <linux/sunrpc/addr.h> |
87545899 | 44 | #include <linux/jhash.h> |
9a74af21 | 45 | #include "xdr4.h" |
06b332a5 | 46 | #include "xdr4cb.h" |
0a3adade | 47 | #include "vfs.h" |
bfa4b365 | 48 | #include "current_stateid.h" |
1da177e4 | 49 | |
5e1533c7 | 50 | #include "netns.h" |
9cf514cc | 51 | #include "pnfs.h" |
5e1533c7 | 52 | |
1da177e4 LT |
53 | #define NFSDDBG_FACILITY NFSDDBG_PROC |
54 | ||
f32f3c2d BF |
55 | #define all_ones {{~0,~0},~0} |
56 | static const stateid_t one_stateid = { | |
57 | .si_generation = ~0, | |
58 | .si_opaque = all_ones, | |
59 | }; | |
60 | static const stateid_t zero_stateid = { | |
61 | /* all fields zero */ | |
62 | }; | |
19ff0f28 TM |
63 | static const stateid_t currentstateid = { |
64 | .si_generation = 1, | |
65 | }; | |
fb500a7c TM |
66 | static const stateid_t close_stateid = { |
67 | .si_generation = 0xffffffffU, | |
68 | }; | |
f32f3c2d | 69 | |
ec6b5d7b | 70 | static u64 current_sessionid = 1; |
fd39ca9a | 71 | |
f32f3c2d BF |
72 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t))) |
73 | #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t))) | |
19ff0f28 | 74 | #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t))) |
ae254dac | 75 | #define CLOSE_STATEID(stateid) (!memcmp((stateid), &close_stateid, sizeof(stateid_t))) |
1da177e4 | 76 | |
1da177e4 | 77 | /* forward declarations */ |
f9c00c3a | 78 | static bool check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner); |
6011695d | 79 | static void nfs4_free_ol_stateid(struct nfs4_stid *stid); |
1da177e4 | 80 | |
8b671b80 BF |
81 | /* Locking: */ |
82 | ||
8b671b80 BF |
83 | /* |
84 | * Currently used for the del_recall_lru and file hash table. In an | |
85 | * effort to decrease the scope of the client_mutex, this spinlock may | |
86 | * eventually cover more: | |
87 | */ | |
cdc97505 | 88 | static DEFINE_SPINLOCK(state_lock); |
8b671b80 | 89 | |
4f34bd05 AE |
90 | enum nfsd4_st_mutex_lock_subclass { |
91 | OPEN_STATEID_MUTEX = 0, | |
92 | LOCK_STATEID_MUTEX = 1, | |
93 | }; | |
94 | ||
b401be22 JL |
95 | /* |
96 | * A waitqueue for all in-progress 4.0 CLOSE operations that are waiting for | |
97 | * the refcount on the open stateid to drop. | |
98 | */ | |
99 | static DECLARE_WAIT_QUEUE_HEAD(close_wq); | |
100 | ||
9258a2d5 | 101 | static struct kmem_cache *client_slab; |
abf1135b CH |
102 | static struct kmem_cache *openowner_slab; |
103 | static struct kmem_cache *lockowner_slab; | |
104 | static struct kmem_cache *file_slab; | |
105 | static struct kmem_cache *stateid_slab; | |
106 | static struct kmem_cache *deleg_slab; | |
8287f009 | 107 | static struct kmem_cache *odstate_slab; |
e60d4398 | 108 | |
66b2b9b2 | 109 | static void free_session(struct nfsd4_session *); |
508dc6e1 | 110 | |
c4cb8974 | 111 | static const struct nfsd4_callback_ops nfsd4_cb_recall_ops; |
76d348fa | 112 | static const struct nfsd4_callback_ops nfsd4_cb_notify_lock_ops; |
0162ac2b | 113 | |
f0f51f5c | 114 | static bool is_session_dead(struct nfsd4_session *ses) |
66b2b9b2 | 115 | { |
f0f51f5c | 116 | return ses->se_flags & NFS4_SESSION_DEAD; |
66b2b9b2 BF |
117 | } |
118 | ||
f0f51f5c | 119 | static __be32 mark_session_dead_locked(struct nfsd4_session *ses, int ref_held_by_me) |
508dc6e1 | 120 | { |
f0f51f5c | 121 | if (atomic_read(&ses->se_ref) > ref_held_by_me) |
66b2b9b2 BF |
122 | return nfserr_jukebox; |
123 | ses->se_flags |= NFS4_SESSION_DEAD; | |
124 | return nfs_ok; | |
508dc6e1 BH |
125 | } |
126 | ||
221a6876 BF |
127 | static bool is_client_expired(struct nfs4_client *clp) |
128 | { | |
129 | return clp->cl_time == 0; | |
130 | } | |
131 | ||
221a6876 BF |
132 | static __be32 get_client_locked(struct nfs4_client *clp) |
133 | { | |
0a880a28 TM |
134 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
135 | ||
136 | lockdep_assert_held(&nn->client_lock); | |
137 | ||
221a6876 BF |
138 | if (is_client_expired(clp)) |
139 | return nfserr_expired; | |
140 | atomic_inc(&clp->cl_refcount); | |
141 | return nfs_ok; | |
142 | } | |
143 | ||
144 | /* must be called under the client_lock */ | |
145 | static inline void | |
146 | renew_client_locked(struct nfs4_client *clp) | |
147 | { | |
148 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
149 | ||
150 | if (is_client_expired(clp)) { | |
151 | WARN_ON(1); | |
152 | printk("%s: client (clientid %08x/%08x) already expired\n", | |
153 | __func__, | |
154 | clp->cl_clientid.cl_boot, | |
155 | clp->cl_clientid.cl_id); | |
156 | return; | |
157 | } | |
158 | ||
159 | dprintk("renewing client (clientid %08x/%08x)\n", | |
160 | clp->cl_clientid.cl_boot, | |
161 | clp->cl_clientid.cl_id); | |
162 | list_move_tail(&clp->cl_lru, &nn->client_lru); | |
163 | clp->cl_time = get_seconds(); | |
164 | } | |
165 | ||
ba138435 | 166 | static void put_client_renew_locked(struct nfs4_client *clp) |
221a6876 | 167 | { |
0a880a28 TM |
168 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
169 | ||
170 | lockdep_assert_held(&nn->client_lock); | |
171 | ||
221a6876 BF |
172 | if (!atomic_dec_and_test(&clp->cl_refcount)) |
173 | return; | |
174 | if (!is_client_expired(clp)) | |
175 | renew_client_locked(clp); | |
176 | } | |
177 | ||
4b24ca7d JL |
178 | static void put_client_renew(struct nfs4_client *clp) |
179 | { | |
180 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
181 | ||
d6c249b4 JL |
182 | if (!atomic_dec_and_lock(&clp->cl_refcount, &nn->client_lock)) |
183 | return; | |
184 | if (!is_client_expired(clp)) | |
185 | renew_client_locked(clp); | |
4b24ca7d JL |
186 | spin_unlock(&nn->client_lock); |
187 | } | |
188 | ||
d4e19e70 TM |
189 | static __be32 nfsd4_get_session_locked(struct nfsd4_session *ses) |
190 | { | |
191 | __be32 status; | |
192 | ||
193 | if (is_session_dead(ses)) | |
194 | return nfserr_badsession; | |
195 | status = get_client_locked(ses->se_client); | |
196 | if (status) | |
197 | return status; | |
198 | atomic_inc(&ses->se_ref); | |
199 | return nfs_ok; | |
200 | } | |
201 | ||
202 | static void nfsd4_put_session_locked(struct nfsd4_session *ses) | |
203 | { | |
204 | struct nfs4_client *clp = ses->se_client; | |
0a880a28 TM |
205 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
206 | ||
207 | lockdep_assert_held(&nn->client_lock); | |
d4e19e70 TM |
208 | |
209 | if (atomic_dec_and_test(&ses->se_ref) && is_session_dead(ses)) | |
210 | free_session(ses); | |
211 | put_client_renew_locked(clp); | |
212 | } | |
213 | ||
214 | static void nfsd4_put_session(struct nfsd4_session *ses) | |
215 | { | |
216 | struct nfs4_client *clp = ses->se_client; | |
217 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
218 | ||
219 | spin_lock(&nn->client_lock); | |
220 | nfsd4_put_session_locked(ses); | |
221 | spin_unlock(&nn->client_lock); | |
222 | } | |
223 | ||
76d348fa JL |
224 | static struct nfsd4_blocked_lock * |
225 | find_blocked_lock(struct nfs4_lockowner *lo, struct knfsd_fh *fh, | |
226 | struct nfsd_net *nn) | |
227 | { | |
228 | struct nfsd4_blocked_lock *cur, *found = NULL; | |
229 | ||
0cc11a61 | 230 | spin_lock(&nn->blocked_locks_lock); |
76d348fa JL |
231 | list_for_each_entry(cur, &lo->lo_blocked, nbl_list) { |
232 | if (fh_match(fh, &cur->nbl_fh)) { | |
233 | list_del_init(&cur->nbl_list); | |
7919d0a2 | 234 | list_del_init(&cur->nbl_lru); |
76d348fa JL |
235 | found = cur; |
236 | break; | |
237 | } | |
238 | } | |
0cc11a61 | 239 | spin_unlock(&nn->blocked_locks_lock); |
76d348fa JL |
240 | if (found) |
241 | posix_unblock_lock(&found->nbl_lock); | |
242 | return found; | |
243 | } | |
244 | ||
245 | static struct nfsd4_blocked_lock * | |
246 | find_or_allocate_block(struct nfs4_lockowner *lo, struct knfsd_fh *fh, | |
247 | struct nfsd_net *nn) | |
248 | { | |
249 | struct nfsd4_blocked_lock *nbl; | |
250 | ||
251 | nbl = find_blocked_lock(lo, fh, nn); | |
252 | if (!nbl) { | |
253 | nbl= kmalloc(sizeof(*nbl), GFP_KERNEL); | |
254 | if (nbl) { | |
255 | fh_copy_shallow(&nbl->nbl_fh, fh); | |
256 | locks_init_lock(&nbl->nbl_lock); | |
257 | nfsd4_init_cb(&nbl->nbl_cb, lo->lo_owner.so_client, | |
258 | &nfsd4_cb_notify_lock_ops, | |
259 | NFSPROC4_CLNT_CB_NOTIFY_LOCK); | |
260 | } | |
261 | } | |
262 | return nbl; | |
263 | } | |
264 | ||
265 | static void | |
266 | free_blocked_lock(struct nfsd4_blocked_lock *nbl) | |
267 | { | |
268 | locks_release_private(&nbl->nbl_lock); | |
269 | kfree(nbl); | |
270 | } | |
271 | ||
68ef3bc3 JL |
272 | static void |
273 | remove_blocked_locks(struct nfs4_lockowner *lo) | |
274 | { | |
275 | struct nfs4_client *clp = lo->lo_owner.so_client; | |
276 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
277 | struct nfsd4_blocked_lock *nbl; | |
278 | LIST_HEAD(reaplist); | |
279 | ||
280 | /* Dequeue all blocked locks */ | |
281 | spin_lock(&nn->blocked_locks_lock); | |
282 | while (!list_empty(&lo->lo_blocked)) { | |
283 | nbl = list_first_entry(&lo->lo_blocked, | |
284 | struct nfsd4_blocked_lock, | |
285 | nbl_list); | |
286 | list_del_init(&nbl->nbl_list); | |
287 | list_move(&nbl->nbl_lru, &reaplist); | |
288 | } | |
289 | spin_unlock(&nn->blocked_locks_lock); | |
290 | ||
291 | /* Now free them */ | |
292 | while (!list_empty(&reaplist)) { | |
293 | nbl = list_first_entry(&reaplist, struct nfsd4_blocked_lock, | |
294 | nbl_lru); | |
295 | list_del_init(&nbl->nbl_lru); | |
296 | posix_unblock_lock(&nbl->nbl_lock); | |
297 | free_blocked_lock(nbl); | |
298 | } | |
299 | } | |
300 | ||
76d348fa JL |
301 | static int |
302 | nfsd4_cb_notify_lock_done(struct nfsd4_callback *cb, struct rpc_task *task) | |
303 | { | |
304 | /* | |
305 | * Since this is just an optimization, we don't try very hard if it | |
306 | * turns out not to succeed. We'll requeue it on NFS4ERR_DELAY, and | |
307 | * just quit trying on anything else. | |
308 | */ | |
309 | switch (task->tk_status) { | |
310 | case -NFS4ERR_DELAY: | |
311 | rpc_delay(task, 1 * HZ); | |
312 | return 0; | |
313 | default: | |
314 | return 1; | |
315 | } | |
316 | } | |
317 | ||
318 | static void | |
319 | nfsd4_cb_notify_lock_release(struct nfsd4_callback *cb) | |
320 | { | |
321 | struct nfsd4_blocked_lock *nbl = container_of(cb, | |
322 | struct nfsd4_blocked_lock, nbl_cb); | |
323 | ||
324 | free_blocked_lock(nbl); | |
325 | } | |
326 | ||
327 | static const struct nfsd4_callback_ops nfsd4_cb_notify_lock_ops = { | |
328 | .done = nfsd4_cb_notify_lock_done, | |
329 | .release = nfsd4_cb_notify_lock_release, | |
330 | }; | |
331 | ||
b5971afa KM |
332 | static inline struct nfs4_stateowner * |
333 | nfs4_get_stateowner(struct nfs4_stateowner *sop) | |
334 | { | |
335 | atomic_inc(&sop->so_count); | |
336 | return sop; | |
337 | } | |
338 | ||
7ffb5880 | 339 | static int |
d4f0489f | 340 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner) |
7ffb5880 TM |
341 | { |
342 | return (sop->so_owner.len == owner->len) && | |
d4f0489f | 343 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len); |
7ffb5880 TM |
344 | } |
345 | ||
346 | static struct nfs4_openowner * | |
347 | find_openstateowner_str_locked(unsigned int hashval, struct nfsd4_open *open, | |
d4f0489f | 348 | struct nfs4_client *clp) |
7ffb5880 TM |
349 | { |
350 | struct nfs4_stateowner *so; | |
7ffb5880 | 351 | |
d4f0489f | 352 | lockdep_assert_held(&clp->cl_lock); |
7ffb5880 | 353 | |
d4f0489f TM |
354 | list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[hashval], |
355 | so_strhash) { | |
7ffb5880 TM |
356 | if (!so->so_is_open_owner) |
357 | continue; | |
b5971afa KM |
358 | if (same_owner_str(so, &open->op_owner)) |
359 | return openowner(nfs4_get_stateowner(so)); | |
7ffb5880 TM |
360 | } |
361 | return NULL; | |
362 | } | |
363 | ||
364 | static struct nfs4_openowner * | |
365 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, | |
d4f0489f | 366 | struct nfs4_client *clp) |
7ffb5880 TM |
367 | { |
368 | struct nfs4_openowner *oo; | |
369 | ||
d4f0489f TM |
370 | spin_lock(&clp->cl_lock); |
371 | oo = find_openstateowner_str_locked(hashval, open, clp); | |
372 | spin_unlock(&clp->cl_lock); | |
7ffb5880 TM |
373 | return oo; |
374 | } | |
375 | ||
1da177e4 LT |
376 | static inline u32 |
377 | opaque_hashval(const void *ptr, int nbytes) | |
378 | { | |
379 | unsigned char *cptr = (unsigned char *) ptr; | |
380 | ||
381 | u32 x = 0; | |
382 | while (nbytes--) { | |
383 | x *= 37; | |
384 | x += *cptr++; | |
385 | } | |
386 | return x; | |
387 | } | |
388 | ||
5b095e99 | 389 | static void nfsd4_free_file_rcu(struct rcu_head *rcu) |
32513b40 | 390 | { |
5b095e99 JL |
391 | struct nfs4_file *fp = container_of(rcu, struct nfs4_file, fi_rcu); |
392 | ||
393 | kmem_cache_free(file_slab, fp); | |
32513b40 BF |
394 | } |
395 | ||
e6ba76e1 | 396 | void |
13cd2184 N |
397 | put_nfs4_file(struct nfs4_file *fi) |
398 | { | |
02e1215f JL |
399 | might_lock(&state_lock); |
400 | ||
818a34eb | 401 | if (refcount_dec_and_lock(&fi->fi_ref, &state_lock)) { |
5b095e99 | 402 | hlist_del_rcu(&fi->fi_hash); |
cdc97505 | 403 | spin_unlock(&state_lock); |
8287f009 | 404 | WARN_ON_ONCE(!list_empty(&fi->fi_clnt_odstate)); |
5b095e99 JL |
405 | WARN_ON_ONCE(!list_empty(&fi->fi_delegations)); |
406 | call_rcu(&fi->fi_rcu, nfsd4_free_file_rcu); | |
8b671b80 | 407 | } |
13cd2184 N |
408 | } |
409 | ||
de18643d TM |
410 | static struct file * |
411 | __nfs4_get_fd(struct nfs4_file *f, int oflag) | |
412 | { | |
413 | if (f->fi_fds[oflag]) | |
414 | return get_file(f->fi_fds[oflag]); | |
415 | return NULL; | |
416 | } | |
417 | ||
418 | static struct file * | |
419 | find_writeable_file_locked(struct nfs4_file *f) | |
420 | { | |
421 | struct file *ret; | |
422 | ||
423 | lockdep_assert_held(&f->fi_lock); | |
424 | ||
425 | ret = __nfs4_get_fd(f, O_WRONLY); | |
426 | if (!ret) | |
427 | ret = __nfs4_get_fd(f, O_RDWR); | |
428 | return ret; | |
429 | } | |
430 | ||
431 | static struct file * | |
432 | find_writeable_file(struct nfs4_file *f) | |
433 | { | |
434 | struct file *ret; | |
435 | ||
436 | spin_lock(&f->fi_lock); | |
437 | ret = find_writeable_file_locked(f); | |
438 | spin_unlock(&f->fi_lock); | |
439 | ||
440 | return ret; | |
441 | } | |
442 | ||
443 | static struct file *find_readable_file_locked(struct nfs4_file *f) | |
444 | { | |
445 | struct file *ret; | |
446 | ||
447 | lockdep_assert_held(&f->fi_lock); | |
448 | ||
449 | ret = __nfs4_get_fd(f, O_RDONLY); | |
450 | if (!ret) | |
451 | ret = __nfs4_get_fd(f, O_RDWR); | |
452 | return ret; | |
453 | } | |
454 | ||
455 | static struct file * | |
456 | find_readable_file(struct nfs4_file *f) | |
457 | { | |
458 | struct file *ret; | |
459 | ||
460 | spin_lock(&f->fi_lock); | |
461 | ret = find_readable_file_locked(f); | |
462 | spin_unlock(&f->fi_lock); | |
463 | ||
464 | return ret; | |
465 | } | |
466 | ||
4d227fca | 467 | struct file * |
de18643d TM |
468 | find_any_file(struct nfs4_file *f) |
469 | { | |
470 | struct file *ret; | |
471 | ||
472 | spin_lock(&f->fi_lock); | |
473 | ret = __nfs4_get_fd(f, O_RDWR); | |
474 | if (!ret) { | |
475 | ret = __nfs4_get_fd(f, O_WRONLY); | |
476 | if (!ret) | |
477 | ret = __nfs4_get_fd(f, O_RDONLY); | |
478 | } | |
479 | spin_unlock(&f->fi_lock); | |
480 | return ret; | |
481 | } | |
482 | ||
02a3508d | 483 | static atomic_long_t num_delegations; |
697ce9be | 484 | unsigned long max_delegations; |
ef0f3390 N |
485 | |
486 | /* | |
487 | * Open owner state (share locks) | |
488 | */ | |
489 | ||
16bfdaaf BF |
490 | /* hash tables for lock and open owners */ |
491 | #define OWNER_HASH_BITS 8 | |
492 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
493 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
ef0f3390 | 494 | |
d4f0489f | 495 | static unsigned int ownerstr_hashval(struct xdr_netobj *ownername) |
ddc04c41 BF |
496 | { |
497 | unsigned int ret; | |
498 | ||
499 | ret = opaque_hashval(ownername->data, ownername->len); | |
16bfdaaf | 500 | return ret & OWNER_HASH_MASK; |
ddc04c41 | 501 | } |
ef0f3390 | 502 | |
ef0f3390 N |
503 | /* hash table for nfs4_file */ |
504 | #define FILE_HASH_BITS 8 | |
505 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
35079582 | 506 | |
ca943217 | 507 | static unsigned int nfsd_fh_hashval(struct knfsd_fh *fh) |
ddc04c41 | 508 | { |
ca943217 TM |
509 | return jhash2(fh->fh_base.fh_pad, XDR_QUADLEN(fh->fh_size), 0); |
510 | } | |
511 | ||
512 | static unsigned int file_hashval(struct knfsd_fh *fh) | |
513 | { | |
514 | return nfsd_fh_hashval(fh) & (FILE_HASH_SIZE - 1); | |
515 | } | |
516 | ||
89876f8c | 517 | static struct hlist_head file_hashtbl[FILE_HASH_SIZE]; |
ef0f3390 | 518 | |
12659651 JL |
519 | static void |
520 | __nfs4_file_get_access(struct nfs4_file *fp, u32 access) | |
3477565e | 521 | { |
7214e860 JL |
522 | lockdep_assert_held(&fp->fi_lock); |
523 | ||
12659651 JL |
524 | if (access & NFS4_SHARE_ACCESS_WRITE) |
525 | atomic_inc(&fp->fi_access[O_WRONLY]); | |
526 | if (access & NFS4_SHARE_ACCESS_READ) | |
527 | atomic_inc(&fp->fi_access[O_RDONLY]); | |
3477565e BF |
528 | } |
529 | ||
12659651 JL |
530 | static __be32 |
531 | nfs4_file_get_access(struct nfs4_file *fp, u32 access) | |
998db52c | 532 | { |
7214e860 JL |
533 | lockdep_assert_held(&fp->fi_lock); |
534 | ||
12659651 JL |
535 | /* Does this access mode make sense? */ |
536 | if (access & ~NFS4_SHARE_ACCESS_BOTH) | |
537 | return nfserr_inval; | |
538 | ||
baeb4ff0 JL |
539 | /* Does it conflict with a deny mode already set? */ |
540 | if ((access & fp->fi_share_deny) != 0) | |
541 | return nfserr_share_denied; | |
542 | ||
12659651 JL |
543 | __nfs4_file_get_access(fp, access); |
544 | return nfs_ok; | |
998db52c BF |
545 | } |
546 | ||
baeb4ff0 JL |
547 | static __be32 nfs4_file_check_deny(struct nfs4_file *fp, u32 deny) |
548 | { | |
549 | /* Common case is that there is no deny mode. */ | |
550 | if (deny) { | |
551 | /* Does this deny mode make sense? */ | |
552 | if (deny & ~NFS4_SHARE_DENY_BOTH) | |
553 | return nfserr_inval; | |
554 | ||
555 | if ((deny & NFS4_SHARE_DENY_READ) && | |
556 | atomic_read(&fp->fi_access[O_RDONLY])) | |
557 | return nfserr_share_denied; | |
558 | ||
559 | if ((deny & NFS4_SHARE_DENY_WRITE) && | |
560 | atomic_read(&fp->fi_access[O_WRONLY])) | |
561 | return nfserr_share_denied; | |
562 | } | |
563 | return nfs_ok; | |
564 | } | |
565 | ||
998db52c | 566 | static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
f9d7562f | 567 | { |
de18643d TM |
568 | might_lock(&fp->fi_lock); |
569 | ||
570 | if (atomic_dec_and_lock(&fp->fi_access[oflag], &fp->fi_lock)) { | |
571 | struct file *f1 = NULL; | |
572 | struct file *f2 = NULL; | |
573 | ||
6d338b51 | 574 | swap(f1, fp->fi_fds[oflag]); |
0c7c3e67 | 575 | if (atomic_read(&fp->fi_access[1 - oflag]) == 0) |
6d338b51 | 576 | swap(f2, fp->fi_fds[O_RDWR]); |
de18643d TM |
577 | spin_unlock(&fp->fi_lock); |
578 | if (f1) | |
579 | fput(f1); | |
580 | if (f2) | |
581 | fput(f2); | |
f9d7562f BF |
582 | } |
583 | } | |
584 | ||
12659651 | 585 | static void nfs4_file_put_access(struct nfs4_file *fp, u32 access) |
998db52c | 586 | { |
12659651 JL |
587 | WARN_ON_ONCE(access & ~NFS4_SHARE_ACCESS_BOTH); |
588 | ||
589 | if (access & NFS4_SHARE_ACCESS_WRITE) | |
998db52c | 590 | __nfs4_file_put_access(fp, O_WRONLY); |
12659651 JL |
591 | if (access & NFS4_SHARE_ACCESS_READ) |
592 | __nfs4_file_put_access(fp, O_RDONLY); | |
998db52c BF |
593 | } |
594 | ||
8287f009 SB |
595 | /* |
596 | * Allocate a new open/delegation state counter. This is needed for | |
597 | * pNFS for proper return on close semantics. | |
598 | * | |
599 | * Note that we only allocate it for pNFS-enabled exports, otherwise | |
600 | * all pointers to struct nfs4_clnt_odstate are always NULL. | |
601 | */ | |
602 | static struct nfs4_clnt_odstate * | |
603 | alloc_clnt_odstate(struct nfs4_client *clp) | |
604 | { | |
605 | struct nfs4_clnt_odstate *co; | |
606 | ||
607 | co = kmem_cache_zalloc(odstate_slab, GFP_KERNEL); | |
608 | if (co) { | |
609 | co->co_client = clp; | |
cff7cb2e | 610 | refcount_set(&co->co_odcount, 1); |
8287f009 SB |
611 | } |
612 | return co; | |
613 | } | |
614 | ||
615 | static void | |
616 | hash_clnt_odstate_locked(struct nfs4_clnt_odstate *co) | |
617 | { | |
618 | struct nfs4_file *fp = co->co_file; | |
619 | ||
620 | lockdep_assert_held(&fp->fi_lock); | |
621 | list_add(&co->co_perfile, &fp->fi_clnt_odstate); | |
622 | } | |
623 | ||
624 | static inline void | |
625 | get_clnt_odstate(struct nfs4_clnt_odstate *co) | |
626 | { | |
627 | if (co) | |
cff7cb2e | 628 | refcount_inc(&co->co_odcount); |
8287f009 SB |
629 | } |
630 | ||
631 | static void | |
632 | put_clnt_odstate(struct nfs4_clnt_odstate *co) | |
633 | { | |
634 | struct nfs4_file *fp; | |
635 | ||
636 | if (!co) | |
637 | return; | |
638 | ||
639 | fp = co->co_file; | |
cff7cb2e | 640 | if (refcount_dec_and_lock(&co->co_odcount, &fp->fi_lock)) { |
8287f009 SB |
641 | list_del(&co->co_perfile); |
642 | spin_unlock(&fp->fi_lock); | |
643 | ||
644 | nfsd4_return_all_file_layouts(co->co_client, fp); | |
645 | kmem_cache_free(odstate_slab, co); | |
646 | } | |
647 | } | |
648 | ||
649 | static struct nfs4_clnt_odstate * | |
650 | find_or_hash_clnt_odstate(struct nfs4_file *fp, struct nfs4_clnt_odstate *new) | |
651 | { | |
652 | struct nfs4_clnt_odstate *co; | |
653 | struct nfs4_client *cl; | |
654 | ||
655 | if (!new) | |
656 | return NULL; | |
657 | ||
658 | cl = new->co_client; | |
659 | ||
660 | spin_lock(&fp->fi_lock); | |
661 | list_for_each_entry(co, &fp->fi_clnt_odstate, co_perfile) { | |
662 | if (co->co_client == cl) { | |
663 | get_clnt_odstate(co); | |
664 | goto out; | |
665 | } | |
666 | } | |
667 | co = new; | |
668 | co->co_file = fp; | |
669 | hash_clnt_odstate_locked(new); | |
670 | out: | |
671 | spin_unlock(&fp->fi_lock); | |
672 | return co; | |
673 | } | |
674 | ||
d19fb70d KM |
675 | struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct kmem_cache *slab, |
676 | void (*sc_free)(struct nfs4_stid *)) | |
2a74aba7 | 677 | { |
3abdb607 | 678 | struct nfs4_stid *stid; |
6136d2b4 | 679 | int new_id; |
2a74aba7 | 680 | |
f8338834 | 681 | stid = kmem_cache_zalloc(slab, GFP_KERNEL); |
3abdb607 BF |
682 | if (!stid) |
683 | return NULL; | |
684 | ||
4770d722 JL |
685 | idr_preload(GFP_KERNEL); |
686 | spin_lock(&cl->cl_lock); | |
687 | new_id = idr_alloc_cyclic(&cl->cl_stateids, stid, 0, 0, GFP_NOWAIT); | |
688 | spin_unlock(&cl->cl_lock); | |
689 | idr_preload_end(); | |
ebd6c707 | 690 | if (new_id < 0) |
3abdb607 | 691 | goto out_free; |
d19fb70d KM |
692 | |
693 | stid->sc_free = sc_free; | |
2a74aba7 | 694 | stid->sc_client = cl; |
3abdb607 BF |
695 | stid->sc_stateid.si_opaque.so_id = new_id; |
696 | stid->sc_stateid.si_opaque.so_clid = cl->cl_clientid; | |
2a74aba7 | 697 | /* Will be incremented before return to client: */ |
a15dfcd5 | 698 | refcount_set(&stid->sc_count, 1); |
9767feb2 | 699 | spin_lock_init(&stid->sc_lock); |
996e0938 | 700 | |
996e0938 | 701 | /* |
3abdb607 BF |
702 | * It shouldn't be a problem to reuse an opaque stateid value. |
703 | * I don't think it is for 4.1. But with 4.0 I worry that, for | |
704 | * example, a stray write retransmission could be accepted by | |
705 | * the server when it should have been rejected. Therefore, | |
706 | * adopt a trick from the sctp code to attempt to maximize the | |
707 | * amount of time until an id is reused, by ensuring they always | |
708 | * "increase" (mod INT_MAX): | |
996e0938 | 709 | */ |
3abdb607 BF |
710 | return stid; |
711 | out_free: | |
2c44a234 | 712 | kmem_cache_free(slab, stid); |
3abdb607 | 713 | return NULL; |
2a74aba7 BF |
714 | } |
715 | ||
b49e084d | 716 | static struct nfs4_ol_stateid * nfs4_alloc_open_stateid(struct nfs4_client *clp) |
4cdc951b | 717 | { |
6011695d | 718 | struct nfs4_stid *stid; |
6011695d | 719 | |
d19fb70d | 720 | stid = nfs4_alloc_stid(clp, stateid_slab, nfs4_free_ol_stateid); |
6011695d TM |
721 | if (!stid) |
722 | return NULL; | |
723 | ||
d19fb70d | 724 | return openlockstateid(stid); |
6011695d TM |
725 | } |
726 | ||
727 | static void nfs4_free_deleg(struct nfs4_stid *stid) | |
728 | { | |
6011695d TM |
729 | kmem_cache_free(deleg_slab, stid); |
730 | atomic_long_dec(&num_delegations); | |
4cdc951b BF |
731 | } |
732 | ||
6282cd56 N |
733 | /* |
734 | * When we recall a delegation, we should be careful not to hand it | |
735 | * out again straight away. | |
736 | * To ensure this we keep a pair of bloom filters ('new' and 'old') | |
737 | * in which the filehandles of recalled delegations are "stored". | |
738 | * If a filehandle appear in either filter, a delegation is blocked. | |
739 | * When a delegation is recalled, the filehandle is stored in the "new" | |
740 | * filter. | |
741 | * Every 30 seconds we swap the filters and clear the "new" one, | |
742 | * unless both are empty of course. | |
743 | * | |
744 | * Each filter is 256 bits. We hash the filehandle to 32bit and use the | |
745 | * low 3 bytes as hash-table indices. | |
746 | * | |
f54fe962 | 747 | * 'blocked_delegations_lock', which is always taken in block_delegations(), |
6282cd56 N |
748 | * is used to manage concurrent access. Testing does not need the lock |
749 | * except when swapping the two filters. | |
750 | */ | |
f54fe962 | 751 | static DEFINE_SPINLOCK(blocked_delegations_lock); |
6282cd56 N |
752 | static struct bloom_pair { |
753 | int entries, old_entries; | |
754 | time_t swap_time; | |
755 | int new; /* index into 'set' */ | |
756 | DECLARE_BITMAP(set[2], 256); | |
757 | } blocked_delegations; | |
758 | ||
759 | static int delegation_blocked(struct knfsd_fh *fh) | |
760 | { | |
761 | u32 hash; | |
762 | struct bloom_pair *bd = &blocked_delegations; | |
763 | ||
764 | if (bd->entries == 0) | |
765 | return 0; | |
766 | if (seconds_since_boot() - bd->swap_time > 30) { | |
f54fe962 | 767 | spin_lock(&blocked_delegations_lock); |
6282cd56 N |
768 | if (seconds_since_boot() - bd->swap_time > 30) { |
769 | bd->entries -= bd->old_entries; | |
770 | bd->old_entries = bd->entries; | |
771 | memset(bd->set[bd->new], 0, | |
772 | sizeof(bd->set[0])); | |
773 | bd->new = 1-bd->new; | |
774 | bd->swap_time = seconds_since_boot(); | |
775 | } | |
f54fe962 | 776 | spin_unlock(&blocked_delegations_lock); |
6282cd56 | 777 | } |
87545899 | 778 | hash = jhash(&fh->fh_base, fh->fh_size, 0); |
6282cd56 N |
779 | if (test_bit(hash&255, bd->set[0]) && |
780 | test_bit((hash>>8)&255, bd->set[0]) && | |
781 | test_bit((hash>>16)&255, bd->set[0])) | |
782 | return 1; | |
783 | ||
784 | if (test_bit(hash&255, bd->set[1]) && | |
785 | test_bit((hash>>8)&255, bd->set[1]) && | |
786 | test_bit((hash>>16)&255, bd->set[1])) | |
787 | return 1; | |
788 | ||
789 | return 0; | |
790 | } | |
791 | ||
792 | static void block_delegations(struct knfsd_fh *fh) | |
793 | { | |
794 | u32 hash; | |
795 | struct bloom_pair *bd = &blocked_delegations; | |
796 | ||
87545899 | 797 | hash = jhash(&fh->fh_base, fh->fh_size, 0); |
6282cd56 | 798 | |
f54fe962 | 799 | spin_lock(&blocked_delegations_lock); |
6282cd56 N |
800 | __set_bit(hash&255, bd->set[bd->new]); |
801 | __set_bit((hash>>8)&255, bd->set[bd->new]); | |
802 | __set_bit((hash>>16)&255, bd->set[bd->new]); | |
803 | if (bd->entries == 0) | |
804 | bd->swap_time = seconds_since_boot(); | |
805 | bd->entries += 1; | |
f54fe962 | 806 | spin_unlock(&blocked_delegations_lock); |
6282cd56 N |
807 | } |
808 | ||
1da177e4 | 809 | static struct nfs4_delegation * |
86d29b10 BF |
810 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_file *fp, |
811 | struct svc_fh *current_fh, | |
8287f009 | 812 | struct nfs4_clnt_odstate *odstate) |
1da177e4 LT |
813 | { |
814 | struct nfs4_delegation *dp; | |
02a3508d | 815 | long n; |
1da177e4 LT |
816 | |
817 | dprintk("NFSD alloc_init_deleg\n"); | |
02a3508d TM |
818 | n = atomic_long_inc_return(&num_delegations); |
819 | if (n < 0 || n > max_delegations) | |
820 | goto out_dec; | |
6282cd56 | 821 | if (delegation_blocked(¤t_fh->fh_handle)) |
02a3508d | 822 | goto out_dec; |
d19fb70d | 823 | dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab, nfs4_free_deleg)); |
5b2d21c1 | 824 | if (dp == NULL) |
02a3508d | 825 | goto out_dec; |
6011695d | 826 | |
2a74aba7 BF |
827 | /* |
828 | * delegation seqid's are never incremented. The 4.1 special | |
6136d2b4 BF |
829 | * meaning of seqid 0 isn't meaningful, really, but let's avoid |
830 | * 0 anyway just for consistency and use 1: | |
2a74aba7 BF |
831 | */ |
832 | dp->dl_stid.sc_stateid.si_generation = 1; | |
ea1da636 N |
833 | INIT_LIST_HEAD(&dp->dl_perfile); |
834 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 | 835 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
8287f009 SB |
836 | dp->dl_clnt_odstate = odstate; |
837 | get_clnt_odstate(odstate); | |
99c41515 | 838 | dp->dl_type = NFS4_OPEN_DELEGATE_READ; |
f0b5de1b CH |
839 | dp->dl_retries = 1; |
840 | nfsd4_init_cb(&dp->dl_recall, dp->dl_stid.sc_client, | |
0162ac2b | 841 | &nfsd4_cb_recall_ops, NFSPROC4_CLNT_CB_RECALL); |
86d29b10 BF |
842 | get_nfs4_file(fp); |
843 | dp->dl_stid.sc_file = fp; | |
1da177e4 | 844 | return dp; |
02a3508d TM |
845 | out_dec: |
846 | atomic_long_dec(&num_delegations); | |
847 | return NULL; | |
1da177e4 LT |
848 | } |
849 | ||
850 | void | |
6011695d | 851 | nfs4_put_stid(struct nfs4_stid *s) |
1da177e4 | 852 | { |
11b9164a | 853 | struct nfs4_file *fp = s->sc_file; |
6011695d TM |
854 | struct nfs4_client *clp = s->sc_client; |
855 | ||
4770d722 JL |
856 | might_lock(&clp->cl_lock); |
857 | ||
a15dfcd5 | 858 | if (!refcount_dec_and_lock(&s->sc_count, &clp->cl_lock)) { |
b401be22 | 859 | wake_up_all(&close_wq); |
6011695d | 860 | return; |
b401be22 | 861 | } |
6011695d | 862 | idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id); |
4770d722 | 863 | spin_unlock(&clp->cl_lock); |
6011695d | 864 | s->sc_free(s); |
11b9164a TM |
865 | if (fp) |
866 | put_nfs4_file(fp); | |
1da177e4 LT |
867 | } |
868 | ||
9767feb2 JL |
869 | void |
870 | nfs4_inc_and_copy_stateid(stateid_t *dst, struct nfs4_stid *stid) | |
871 | { | |
872 | stateid_t *src = &stid->sc_stateid; | |
873 | ||
874 | spin_lock(&stid->sc_lock); | |
875 | if (unlikely(++src->si_generation == 0)) | |
876 | src->si_generation = 1; | |
877 | memcpy(dst, src, sizeof(*dst)); | |
878 | spin_unlock(&stid->sc_lock); | |
879 | } | |
880 | ||
353601e7 | 881 | static void put_deleg_file(struct nfs4_file *fp) |
1da177e4 | 882 | { |
6bcc034e | 883 | struct file *filp = NULL; |
b8232d33 | 884 | |
6bcc034e | 885 | spin_lock(&fp->fi_lock); |
353601e7 | 886 | if (--fp->fi_delegees == 0) |
6bcc034e | 887 | swap(filp, fp->fi_deleg_file); |
6bcc034e JL |
888 | spin_unlock(&fp->fi_lock); |
889 | ||
353601e7 | 890 | if (filp) |
6bcc034e | 891 | fput(filp); |
353601e7 BF |
892 | } |
893 | ||
894 | static void nfs4_unlock_deleg_lease(struct nfs4_delegation *dp) | |
895 | { | |
896 | struct nfs4_file *fp = dp->dl_stid.sc_file; | |
897 | struct file *filp = fp->fi_deleg_file; | |
898 | ||
899 | WARN_ON_ONCE(!fp->fi_delegees); | |
900 | ||
901 | vfs_setlease(filp, F_UNLCK, NULL, (void **)&dp); | |
902 | put_deleg_file(fp); | |
1da177e4 LT |
903 | } |
904 | ||
0af6e690 BF |
905 | static void destroy_unhashed_deleg(struct nfs4_delegation *dp) |
906 | { | |
907 | put_clnt_odstate(dp->dl_clnt_odstate); | |
353601e7 | 908 | nfs4_unlock_deleg_lease(dp); |
0af6e690 BF |
909 | nfs4_put_stid(&dp->dl_stid); |
910 | } | |
911 | ||
cd61c522 | 912 | void nfs4_unhash_stid(struct nfs4_stid *s) |
6136d2b4 | 913 | { |
3abdb607 | 914 | s->sc_type = 0; |
6136d2b4 BF |
915 | } |
916 | ||
34ed9872 | 917 | /** |
68b18f52 | 918 | * nfs4_delegation_exists - Discover if this delegation already exists |
34ed9872 AE |
919 | * @clp: a pointer to the nfs4_client we're granting a delegation to |
920 | * @fp: a pointer to the nfs4_file we're granting a delegation on | |
921 | * | |
922 | * Return: | |
68b18f52 | 923 | * On success: true iff an existing delegation is found |
34ed9872 AE |
924 | */ |
925 | ||
68b18f52 BF |
926 | static bool |
927 | nfs4_delegation_exists(struct nfs4_client *clp, struct nfs4_file *fp) | |
34ed9872 AE |
928 | { |
929 | struct nfs4_delegation *searchdp = NULL; | |
930 | struct nfs4_client *searchclp = NULL; | |
931 | ||
932 | lockdep_assert_held(&state_lock); | |
933 | lockdep_assert_held(&fp->fi_lock); | |
934 | ||
935 | list_for_each_entry(searchdp, &fp->fi_delegations, dl_perfile) { | |
936 | searchclp = searchdp->dl_stid.sc_client; | |
937 | if (clp == searchclp) { | |
51d87bc2 | 938 | return true; |
34ed9872 AE |
939 | } |
940 | } | |
51d87bc2 | 941 | return false; |
34ed9872 AE |
942 | } |
943 | ||
944 | /** | |
945 | * hash_delegation_locked - Add a delegation to the appropriate lists | |
946 | * @dp: a pointer to the nfs4_delegation we are adding. | |
947 | * @fp: a pointer to the nfs4_file we're granting a delegation on | |
948 | * | |
949 | * Return: | |
950 | * On success: NULL if the delegation was successfully hashed. | |
951 | * | |
952 | * On error: -EAGAIN if one was previously granted to this | |
953 | * nfs4_client for this nfs4_file. Delegation is not hashed. | |
954 | * | |
955 | */ | |
956 | ||
957 | static int | |
931ee56c BH |
958 | hash_delegation_locked(struct nfs4_delegation *dp, struct nfs4_file *fp) |
959 | { | |
34ed9872 AE |
960 | struct nfs4_client *clp = dp->dl_stid.sc_client; |
961 | ||
cdc97505 | 962 | lockdep_assert_held(&state_lock); |
417c6629 | 963 | lockdep_assert_held(&fp->fi_lock); |
931ee56c | 964 | |
68b18f52 BF |
965 | if (nfs4_delegation_exists(clp, fp)) |
966 | return -EAGAIN; | |
a15dfcd5 | 967 | refcount_inc(&dp->dl_stid.sc_count); |
3fb87d13 | 968 | dp->dl_stid.sc_type = NFS4_DELEG_STID; |
931ee56c | 969 | list_add(&dp->dl_perfile, &fp->fi_delegations); |
34ed9872 AE |
970 | list_add(&dp->dl_perclnt, &clp->cl_delegations); |
971 | return 0; | |
931ee56c BH |
972 | } |
973 | ||
3fcbbd24 | 974 | static bool |
42690676 | 975 | unhash_delegation_locked(struct nfs4_delegation *dp) |
1da177e4 | 976 | { |
11b9164a | 977 | struct nfs4_file *fp = dp->dl_stid.sc_file; |
02e1215f | 978 | |
42690676 JL |
979 | lockdep_assert_held(&state_lock); |
980 | ||
3fcbbd24 JL |
981 | if (list_empty(&dp->dl_perfile)) |
982 | return false; | |
983 | ||
b0fc29d6 | 984 | dp->dl_stid.sc_type = NFS4_CLOSED_DELEG_STID; |
d55a166c JL |
985 | /* Ensure that deleg break won't try to requeue it */ |
986 | ++dp->dl_time; | |
417c6629 | 987 | spin_lock(&fp->fi_lock); |
931ee56c | 988 | list_del_init(&dp->dl_perclnt); |
1da177e4 | 989 | list_del_init(&dp->dl_recall_lru); |
02e1215f JL |
990 | list_del_init(&dp->dl_perfile); |
991 | spin_unlock(&fp->fi_lock); | |
3fcbbd24 | 992 | return true; |
3bd64a5b BF |
993 | } |
994 | ||
3bd64a5b BF |
995 | static void destroy_delegation(struct nfs4_delegation *dp) |
996 | { | |
3fcbbd24 JL |
997 | bool unhashed; |
998 | ||
42690676 | 999 | spin_lock(&state_lock); |
3fcbbd24 | 1000 | unhashed = unhash_delegation_locked(dp); |
42690676 | 1001 | spin_unlock(&state_lock); |
0af6e690 BF |
1002 | if (unhashed) |
1003 | destroy_unhashed_deleg(dp); | |
3bd64a5b BF |
1004 | } |
1005 | ||
1006 | static void revoke_delegation(struct nfs4_delegation *dp) | |
1007 | { | |
1008 | struct nfs4_client *clp = dp->dl_stid.sc_client; | |
1009 | ||
2d4a532d JL |
1010 | WARN_ON(!list_empty(&dp->dl_recall_lru)); |
1011 | ||
0af6e690 | 1012 | if (clp->cl_minorversion) { |
3bd64a5b | 1013 | dp->dl_stid.sc_type = NFS4_REVOKED_DELEG_STID; |
0af6e690 | 1014 | refcount_inc(&dp->dl_stid.sc_count); |
2d4a532d JL |
1015 | spin_lock(&clp->cl_lock); |
1016 | list_add(&dp->dl_recall_lru, &clp->cl_revoked); | |
1017 | spin_unlock(&clp->cl_lock); | |
3bd64a5b | 1018 | } |
0af6e690 | 1019 | destroy_unhashed_deleg(dp); |
3bd64a5b BF |
1020 | } |
1021 | ||
1da177e4 LT |
1022 | /* |
1023 | * SETCLIENTID state | |
1024 | */ | |
1025 | ||
ddc04c41 BF |
1026 | static unsigned int clientid_hashval(u32 id) |
1027 | { | |
1028 | return id & CLIENT_HASH_MASK; | |
1029 | } | |
1030 | ||
1031 | static unsigned int clientstr_hashval(const char *name) | |
1032 | { | |
1033 | return opaque_hashval(name, 8) & CLIENT_HASH_MASK; | |
1034 | } | |
1035 | ||
f9d7562f BF |
1036 | /* |
1037 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
1038 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
1039 | * only what share bits are currently in force, but also what | |
1040 | * combinations of share bits previous opens have used. This allows us | |
1041 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
1042 | * return an error if the client attempt to downgrade to a combination | |
1043 | * of share bits not explicable by closing some of its previous opens. | |
1044 | * | |
1045 | * XXX: This enforcement is actually incomplete, since we don't keep | |
1046 | * track of access/deny bit combinations; so, e.g., we allow: | |
1047 | * | |
1048 | * OPEN allow read, deny write | |
1049 | * OPEN allow both, deny none | |
1050 | * DOWNGRADE allow read, deny none | |
1051 | * | |
1052 | * which we should reject. | |
1053 | */ | |
5ae037e5 JL |
1054 | static unsigned int |
1055 | bmap_to_share_mode(unsigned long bmap) { | |
f9d7562f | 1056 | int i; |
5ae037e5 | 1057 | unsigned int access = 0; |
f9d7562f | 1058 | |
f9d7562f BF |
1059 | for (i = 1; i < 4; i++) { |
1060 | if (test_bit(i, &bmap)) | |
5ae037e5 | 1061 | access |= i; |
f9d7562f | 1062 | } |
5ae037e5 | 1063 | return access; |
f9d7562f BF |
1064 | } |
1065 | ||
82c5ff1b JL |
1066 | /* set share access for a given stateid */ |
1067 | static inline void | |
1068 | set_access(u32 access, struct nfs4_ol_stateid *stp) | |
1069 | { | |
c11c591f JL |
1070 | unsigned char mask = 1 << access; |
1071 | ||
1072 | WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH); | |
1073 | stp->st_access_bmap |= mask; | |
82c5ff1b JL |
1074 | } |
1075 | ||
1076 | /* clear share access for a given stateid */ | |
1077 | static inline void | |
1078 | clear_access(u32 access, struct nfs4_ol_stateid *stp) | |
1079 | { | |
c11c591f JL |
1080 | unsigned char mask = 1 << access; |
1081 | ||
1082 | WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH); | |
1083 | stp->st_access_bmap &= ~mask; | |
82c5ff1b JL |
1084 | } |
1085 | ||
1086 | /* test whether a given stateid has access */ | |
1087 | static inline bool | |
1088 | test_access(u32 access, struct nfs4_ol_stateid *stp) | |
1089 | { | |
c11c591f JL |
1090 | unsigned char mask = 1 << access; |
1091 | ||
1092 | return (bool)(stp->st_access_bmap & mask); | |
82c5ff1b JL |
1093 | } |
1094 | ||
ce0fc43c JL |
1095 | /* set share deny for a given stateid */ |
1096 | static inline void | |
c11c591f | 1097 | set_deny(u32 deny, struct nfs4_ol_stateid *stp) |
ce0fc43c | 1098 | { |
c11c591f JL |
1099 | unsigned char mask = 1 << deny; |
1100 | ||
1101 | WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH); | |
1102 | stp->st_deny_bmap |= mask; | |
ce0fc43c JL |
1103 | } |
1104 | ||
1105 | /* clear share deny for a given stateid */ | |
1106 | static inline void | |
c11c591f | 1107 | clear_deny(u32 deny, struct nfs4_ol_stateid *stp) |
ce0fc43c | 1108 | { |
c11c591f JL |
1109 | unsigned char mask = 1 << deny; |
1110 | ||
1111 | WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH); | |
1112 | stp->st_deny_bmap &= ~mask; | |
ce0fc43c JL |
1113 | } |
1114 | ||
1115 | /* test whether a given stateid is denying specific access */ | |
1116 | static inline bool | |
c11c591f | 1117 | test_deny(u32 deny, struct nfs4_ol_stateid *stp) |
ce0fc43c | 1118 | { |
c11c591f JL |
1119 | unsigned char mask = 1 << deny; |
1120 | ||
1121 | return (bool)(stp->st_deny_bmap & mask); | |
f9d7562f BF |
1122 | } |
1123 | ||
1124 | static int nfs4_access_to_omode(u32 access) | |
1125 | { | |
8f34a430 | 1126 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
1127 | case NFS4_SHARE_ACCESS_READ: |
1128 | return O_RDONLY; | |
1129 | case NFS4_SHARE_ACCESS_WRITE: | |
1130 | return O_WRONLY; | |
1131 | case NFS4_SHARE_ACCESS_BOTH: | |
1132 | return O_RDWR; | |
1133 | } | |
063b0fb9 BF |
1134 | WARN_ON_ONCE(1); |
1135 | return O_RDONLY; | |
f9d7562f BF |
1136 | } |
1137 | ||
baeb4ff0 JL |
1138 | /* |
1139 | * A stateid that had a deny mode associated with it is being released | |
1140 | * or downgraded. Recalculate the deny mode on the file. | |
1141 | */ | |
1142 | static void | |
1143 | recalculate_deny_mode(struct nfs4_file *fp) | |
1144 | { | |
1145 | struct nfs4_ol_stateid *stp; | |
1146 | ||
1147 | spin_lock(&fp->fi_lock); | |
1148 | fp->fi_share_deny = 0; | |
1149 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) | |
1150 | fp->fi_share_deny |= bmap_to_share_mode(stp->st_deny_bmap); | |
1151 | spin_unlock(&fp->fi_lock); | |
1152 | } | |
1153 | ||
1154 | static void | |
1155 | reset_union_bmap_deny(u32 deny, struct nfs4_ol_stateid *stp) | |
1156 | { | |
1157 | int i; | |
1158 | bool change = false; | |
1159 | ||
1160 | for (i = 1; i < 4; i++) { | |
1161 | if ((i & deny) != i) { | |
1162 | change = true; | |
1163 | clear_deny(i, stp); | |
1164 | } | |
1165 | } | |
1166 | ||
1167 | /* Recalculate per-file deny mode if there was a change */ | |
1168 | if (change) | |
11b9164a | 1169 | recalculate_deny_mode(stp->st_stid.sc_file); |
baeb4ff0 JL |
1170 | } |
1171 | ||
82c5ff1b JL |
1172 | /* release all access and file references for a given stateid */ |
1173 | static void | |
1174 | release_all_access(struct nfs4_ol_stateid *stp) | |
1175 | { | |
1176 | int i; | |
11b9164a | 1177 | struct nfs4_file *fp = stp->st_stid.sc_file; |
baeb4ff0 JL |
1178 | |
1179 | if (fp && stp->st_deny_bmap != 0) | |
1180 | recalculate_deny_mode(fp); | |
82c5ff1b JL |
1181 | |
1182 | for (i = 1; i < 4; i++) { | |
1183 | if (test_access(i, stp)) | |
11b9164a | 1184 | nfs4_file_put_access(stp->st_stid.sc_file, i); |
82c5ff1b JL |
1185 | clear_access(i, stp); |
1186 | } | |
1187 | } | |
1188 | ||
d50ffded KM |
1189 | static inline void nfs4_free_stateowner(struct nfs4_stateowner *sop) |
1190 | { | |
1191 | kfree(sop->so_owner.data); | |
1192 | sop->so_ops->so_free(sop); | |
1193 | } | |
1194 | ||
6b180f0b JL |
1195 | static void nfs4_put_stateowner(struct nfs4_stateowner *sop) |
1196 | { | |
a819ecc1 JL |
1197 | struct nfs4_client *clp = sop->so_client; |
1198 | ||
1199 | might_lock(&clp->cl_lock); | |
1200 | ||
1201 | if (!atomic_dec_and_lock(&sop->so_count, &clp->cl_lock)) | |
6b180f0b | 1202 | return; |
8f4b54c5 | 1203 | sop->so_ops->so_unhash(sop); |
a819ecc1 | 1204 | spin_unlock(&clp->cl_lock); |
d50ffded | 1205 | nfs4_free_stateowner(sop); |
6b180f0b JL |
1206 | } |
1207 | ||
e8568739 | 1208 | static bool unhash_ol_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 1209 | { |
11b9164a | 1210 | struct nfs4_file *fp = stp->st_stid.sc_file; |
1d31a253 | 1211 | |
1c755dc1 JL |
1212 | lockdep_assert_held(&stp->st_stateowner->so_client->cl_lock); |
1213 | ||
e8568739 JL |
1214 | if (list_empty(&stp->st_perfile)) |
1215 | return false; | |
1216 | ||
1d31a253 | 1217 | spin_lock(&fp->fi_lock); |
e8568739 | 1218 | list_del_init(&stp->st_perfile); |
1d31a253 | 1219 | spin_unlock(&fp->fi_lock); |
529d7b2a | 1220 | list_del(&stp->st_perstateowner); |
e8568739 | 1221 | return true; |
529d7b2a BF |
1222 | } |
1223 | ||
6011695d | 1224 | static void nfs4_free_ol_stateid(struct nfs4_stid *stid) |
529d7b2a | 1225 | { |
6011695d | 1226 | struct nfs4_ol_stateid *stp = openlockstateid(stid); |
4665e2ba | 1227 | |
8287f009 | 1228 | put_clnt_odstate(stp->st_clnt_odstate); |
6011695d | 1229 | release_all_access(stp); |
d3134b10 JL |
1230 | if (stp->st_stateowner) |
1231 | nfs4_put_stateowner(stp->st_stateowner); | |
6011695d | 1232 | kmem_cache_free(stateid_slab, stid); |
529d7b2a BF |
1233 | } |
1234 | ||
b49e084d | 1235 | static void nfs4_free_lock_stateid(struct nfs4_stid *stid) |
529d7b2a | 1236 | { |
b49e084d JL |
1237 | struct nfs4_ol_stateid *stp = openlockstateid(stid); |
1238 | struct nfs4_lockowner *lo = lockowner(stp->st_stateowner); | |
529d7b2a BF |
1239 | struct file *file; |
1240 | ||
b49e084d JL |
1241 | file = find_any_file(stp->st_stid.sc_file); |
1242 | if (file) | |
1243 | filp_close(file, (fl_owner_t)lo); | |
1244 | nfs4_free_ol_stateid(stid); | |
1245 | } | |
1246 | ||
2c41beb0 JL |
1247 | /* |
1248 | * Put the persistent reference to an already unhashed generic stateid, while | |
1249 | * holding the cl_lock. If it's the last reference, then put it onto the | |
1250 | * reaplist for later destruction. | |
1251 | */ | |
1252 | static void put_ol_stateid_locked(struct nfs4_ol_stateid *stp, | |
1253 | struct list_head *reaplist) | |
1254 | { | |
1255 | struct nfs4_stid *s = &stp->st_stid; | |
1256 | struct nfs4_client *clp = s->sc_client; | |
1257 | ||
1258 | lockdep_assert_held(&clp->cl_lock); | |
1259 | ||
1260 | WARN_ON_ONCE(!list_empty(&stp->st_locks)); | |
1261 | ||
a15dfcd5 | 1262 | if (!refcount_dec_and_test(&s->sc_count)) { |
2c41beb0 JL |
1263 | wake_up_all(&close_wq); |
1264 | return; | |
1265 | } | |
1266 | ||
1267 | idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id); | |
1268 | list_add(&stp->st_locks, reaplist); | |
1269 | } | |
1270 | ||
e8568739 | 1271 | static bool unhash_lock_stateid(struct nfs4_ol_stateid *stp) |
b49e084d | 1272 | { |
f46c445b | 1273 | lockdep_assert_held(&stp->st_stid.sc_client->cl_lock); |
3c1c995c JL |
1274 | |
1275 | list_del_init(&stp->st_locks); | |
cd61c522 | 1276 | nfs4_unhash_stid(&stp->st_stid); |
e8568739 | 1277 | return unhash_ol_stateid(stp); |
3c1c995c JL |
1278 | } |
1279 | ||
1280 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) | |
1281 | { | |
f46c445b | 1282 | struct nfs4_client *clp = stp->st_stid.sc_client; |
e8568739 | 1283 | bool unhashed; |
3c1c995c | 1284 | |
f46c445b | 1285 | spin_lock(&clp->cl_lock); |
e8568739 | 1286 | unhashed = unhash_lock_stateid(stp); |
f46c445b | 1287 | spin_unlock(&clp->cl_lock); |
e8568739 JL |
1288 | if (unhashed) |
1289 | nfs4_put_stid(&stp->st_stid); | |
529d7b2a BF |
1290 | } |
1291 | ||
c58c6610 | 1292 | static void unhash_lockowner_locked(struct nfs4_lockowner *lo) |
8f4b54c5 | 1293 | { |
d4f0489f | 1294 | struct nfs4_client *clp = lo->lo_owner.so_client; |
c58c6610 | 1295 | |
d4f0489f | 1296 | lockdep_assert_held(&clp->cl_lock); |
c58c6610 | 1297 | |
8f4b54c5 JL |
1298 | list_del_init(&lo->lo_owner.so_strhash); |
1299 | } | |
1300 | ||
2c41beb0 JL |
1301 | /* |
1302 | * Free a list of generic stateids that were collected earlier after being | |
1303 | * fully unhashed. | |
1304 | */ | |
1305 | static void | |
1306 | free_ol_stateid_reaplist(struct list_head *reaplist) | |
1307 | { | |
1308 | struct nfs4_ol_stateid *stp; | |
fb94d766 | 1309 | struct nfs4_file *fp; |
2c41beb0 JL |
1310 | |
1311 | might_sleep(); | |
1312 | ||
1313 | while (!list_empty(reaplist)) { | |
1314 | stp = list_first_entry(reaplist, struct nfs4_ol_stateid, | |
1315 | st_locks); | |
1316 | list_del(&stp->st_locks); | |
fb94d766 | 1317 | fp = stp->st_stid.sc_file; |
2c41beb0 | 1318 | stp->st_stid.sc_free(&stp->st_stid); |
fb94d766 KM |
1319 | if (fp) |
1320 | put_nfs4_file(fp); | |
2c41beb0 JL |
1321 | } |
1322 | } | |
1323 | ||
d83017f9 JL |
1324 | static void release_open_stateid_locks(struct nfs4_ol_stateid *open_stp, |
1325 | struct list_head *reaplist) | |
3c87b9b7 TM |
1326 | { |
1327 | struct nfs4_ol_stateid *stp; | |
1328 | ||
e8568739 JL |
1329 | lockdep_assert_held(&open_stp->st_stid.sc_client->cl_lock); |
1330 | ||
3c87b9b7 TM |
1331 | while (!list_empty(&open_stp->st_locks)) { |
1332 | stp = list_entry(open_stp->st_locks.next, | |
1333 | struct nfs4_ol_stateid, st_locks); | |
e8568739 | 1334 | WARN_ON(!unhash_lock_stateid(stp)); |
d83017f9 | 1335 | put_ol_stateid_locked(stp, reaplist); |
529d7b2a BF |
1336 | } |
1337 | } | |
1338 | ||
e8568739 | 1339 | static bool unhash_open_stateid(struct nfs4_ol_stateid *stp, |
d83017f9 | 1340 | struct list_head *reaplist) |
2283963f | 1341 | { |
e8568739 JL |
1342 | bool unhashed; |
1343 | ||
2c41beb0 JL |
1344 | lockdep_assert_held(&stp->st_stid.sc_client->cl_lock); |
1345 | ||
e8568739 | 1346 | unhashed = unhash_ol_stateid(stp); |
d83017f9 | 1347 | release_open_stateid_locks(stp, reaplist); |
e8568739 | 1348 | return unhashed; |
38c387b5 BF |
1349 | } |
1350 | ||
1351 | static void release_open_stateid(struct nfs4_ol_stateid *stp) | |
1352 | { | |
2c41beb0 JL |
1353 | LIST_HEAD(reaplist); |
1354 | ||
1355 | spin_lock(&stp->st_stid.sc_client->cl_lock); | |
e8568739 JL |
1356 | if (unhash_open_stateid(stp, &reaplist)) |
1357 | put_ol_stateid_locked(stp, &reaplist); | |
2c41beb0 JL |
1358 | spin_unlock(&stp->st_stid.sc_client->cl_lock); |
1359 | free_ol_stateid_reaplist(&reaplist); | |
2283963f BF |
1360 | } |
1361 | ||
7ffb5880 | 1362 | static void unhash_openowner_locked(struct nfs4_openowner *oo) |
f1d110ca | 1363 | { |
d4f0489f | 1364 | struct nfs4_client *clp = oo->oo_owner.so_client; |
7ffb5880 | 1365 | |
d4f0489f | 1366 | lockdep_assert_held(&clp->cl_lock); |
7ffb5880 | 1367 | |
8f4b54c5 JL |
1368 | list_del_init(&oo->oo_owner.so_strhash); |
1369 | list_del_init(&oo->oo_perclient); | |
f1d110ca BF |
1370 | } |
1371 | ||
f7a4d872 BF |
1372 | static void release_last_closed_stateid(struct nfs4_openowner *oo) |
1373 | { | |
217526e7 JL |
1374 | struct nfsd_net *nn = net_generic(oo->oo_owner.so_client->net, |
1375 | nfsd_net_id); | |
1376 | struct nfs4_ol_stateid *s; | |
f7a4d872 | 1377 | |
217526e7 JL |
1378 | spin_lock(&nn->client_lock); |
1379 | s = oo->oo_last_closed_stid; | |
f7a4d872 | 1380 | if (s) { |
d3134b10 | 1381 | list_del_init(&oo->oo_close_lru); |
f7a4d872 BF |
1382 | oo->oo_last_closed_stid = NULL; |
1383 | } | |
217526e7 JL |
1384 | spin_unlock(&nn->client_lock); |
1385 | if (s) | |
1386 | nfs4_put_stid(&s->st_stid); | |
f7a4d872 BF |
1387 | } |
1388 | ||
2c41beb0 | 1389 | static void release_openowner(struct nfs4_openowner *oo) |
8f4b54c5 JL |
1390 | { |
1391 | struct nfs4_ol_stateid *stp; | |
d4f0489f | 1392 | struct nfs4_client *clp = oo->oo_owner.so_client; |
2c41beb0 | 1393 | struct list_head reaplist; |
7ffb5880 | 1394 | |
2c41beb0 | 1395 | INIT_LIST_HEAD(&reaplist); |
8f4b54c5 | 1396 | |
2c41beb0 JL |
1397 | spin_lock(&clp->cl_lock); |
1398 | unhash_openowner_locked(oo); | |
8f4b54c5 JL |
1399 | while (!list_empty(&oo->oo_owner.so_stateids)) { |
1400 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
1401 | struct nfs4_ol_stateid, st_perstateowner); | |
e8568739 JL |
1402 | if (unhash_open_stateid(stp, &reaplist)) |
1403 | put_ol_stateid_locked(stp, &reaplist); | |
8f4b54c5 | 1404 | } |
d4f0489f | 1405 | spin_unlock(&clp->cl_lock); |
2c41beb0 | 1406 | free_ol_stateid_reaplist(&reaplist); |
f7a4d872 | 1407 | release_last_closed_stateid(oo); |
6b180f0b | 1408 | nfs4_put_stateowner(&oo->oo_owner); |
f1d110ca BF |
1409 | } |
1410 | ||
5282fd72 ME |
1411 | static inline int |
1412 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
1413 | { | |
1414 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
1415 | ||
1416 | return sid->sequence % SESSION_HASH_SIZE; | |
1417 | } | |
1418 | ||
135dd002 | 1419 | #ifdef CONFIG_SUNRPC_DEBUG |
5282fd72 ME |
1420 | static inline void |
1421 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
1422 | { | |
1423 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
1424 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
1425 | } | |
8f199b82 TM |
1426 | #else |
1427 | static inline void | |
1428 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
1429 | { | |
1430 | } | |
1431 | #endif | |
1432 | ||
9411b1d4 BF |
1433 | /* |
1434 | * Bump the seqid on cstate->replay_owner, and clear replay_owner if it | |
1435 | * won't be used for replay. | |
1436 | */ | |
1437 | void nfsd4_bump_seqid(struct nfsd4_compound_state *cstate, __be32 nfserr) | |
1438 | { | |
1439 | struct nfs4_stateowner *so = cstate->replay_owner; | |
1440 | ||
1441 | if (nfserr == nfserr_replay_me) | |
1442 | return; | |
1443 | ||
1444 | if (!seqid_mutating_err(ntohl(nfserr))) { | |
58fb12e6 | 1445 | nfsd4_cstate_clear_replay(cstate); |
9411b1d4 BF |
1446 | return; |
1447 | } | |
1448 | if (!so) | |
1449 | return; | |
1450 | if (so->so_is_open_owner) | |
1451 | release_last_closed_stateid(openowner(so)); | |
1452 | so->so_seqid++; | |
1453 | return; | |
1454 | } | |
5282fd72 | 1455 | |
ec6b5d7b AA |
1456 | static void |
1457 | gen_sessionid(struct nfsd4_session *ses) | |
1458 | { | |
1459 | struct nfs4_client *clp = ses->se_client; | |
1460 | struct nfsd4_sessionid *sid; | |
1461 | ||
1462 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
1463 | sid->clientid = clp->cl_clientid; | |
1464 | sid->sequence = current_sessionid++; | |
1465 | sid->reserved = 0; | |
1466 | } | |
1467 | ||
1468 | /* | |
a649637c AA |
1469 | * The protocol defines ca_maxresponssize_cached to include the size of |
1470 | * the rpc header, but all we need to cache is the data starting after | |
1471 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
1472 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
1473 | * value that is the number of bytes in our cache plus a few additional | |
1474 | * bytes. In order to stay on the safe side, and not promise more than | |
1475 | * we can cache, those additional bytes must be the minimum possible: 24 | |
1476 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
1477 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
1478 | * for the SEQUENCE op response: | |
1479 | */ | |
1480 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
1481 | ||
557ce264 AA |
1482 | static void |
1483 | free_session_slots(struct nfsd4_session *ses) | |
1484 | { | |
1485 | int i; | |
1486 | ||
53da6a53 BF |
1487 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) { |
1488 | free_svc_cred(&ses->se_slots[i]->sl_cred); | |
557ce264 | 1489 | kfree(ses->se_slots[i]); |
53da6a53 | 1490 | } |
557ce264 AA |
1491 | } |
1492 | ||
a649637c | 1493 | /* |
efe0cb6d BF |
1494 | * We don't actually need to cache the rpc and session headers, so we |
1495 | * can allocate a little less for each slot: | |
1496 | */ | |
55c760cf | 1497 | static inline u32 slot_bytes(struct nfsd4_channel_attrs *ca) |
efe0cb6d | 1498 | { |
55c760cf | 1499 | u32 size; |
efe0cb6d | 1500 | |
55c760cf BF |
1501 | if (ca->maxresp_cached < NFSD_MIN_HDR_SEQ_SZ) |
1502 | size = 0; | |
1503 | else | |
1504 | size = ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
1505 | return size + sizeof(struct nfsd4_slot); | |
5b6feee9 | 1506 | } |
ec6b5d7b | 1507 | |
5b6feee9 BF |
1508 | /* |
1509 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c | 1510 | * re-negotiate active sessions and reduce their slot usage to make |
42b2aa86 | 1511 | * room for new connections. For now we just fail the create session. |
ec6b5d7b | 1512 | */ |
55c760cf | 1513 | static u32 nfsd4_get_drc_mem(struct nfsd4_channel_attrs *ca) |
ec6b5d7b | 1514 | { |
55c760cf BF |
1515 | u32 slotsize = slot_bytes(ca); |
1516 | u32 num = ca->maxreqs; | |
5b6feee9 | 1517 | int avail; |
ec6b5d7b | 1518 | |
5b6feee9 | 1519 | spin_lock(&nfsd_drc_lock); |
697ce9be ZY |
1520 | avail = min((unsigned long)NFSD_MAX_MEM_PER_SESSION, |
1521 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
de766e57 BF |
1522 | /* |
1523 | * Never use more than a third of the remaining memory, | |
1524 | * unless it's the only way to give this client a slot: | |
1525 | */ | |
1526 | avail = clamp_t(int, avail, slotsize, avail/3); | |
5b6feee9 BF |
1527 | num = min_t(int, num, avail / slotsize); |
1528 | nfsd_drc_mem_used += num * slotsize; | |
1529 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 1530 | |
5b6feee9 BF |
1531 | return num; |
1532 | } | |
ec6b5d7b | 1533 | |
55c760cf | 1534 | static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs *ca) |
5b6feee9 | 1535 | { |
55c760cf BF |
1536 | int slotsize = slot_bytes(ca); |
1537 | ||
4bd9b0f4 | 1538 | spin_lock(&nfsd_drc_lock); |
55c760cf | 1539 | nfsd_drc_mem_used -= slotsize * ca->maxreqs; |
4bd9b0f4 | 1540 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 1541 | } |
ec6b5d7b | 1542 | |
60810e54 KM |
1543 | static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fattrs, |
1544 | struct nfsd4_channel_attrs *battrs) | |
5b6feee9 | 1545 | { |
60810e54 KM |
1546 | int numslots = fattrs->maxreqs; |
1547 | int slotsize = slot_bytes(fattrs); | |
5b6feee9 BF |
1548 | struct nfsd4_session *new; |
1549 | int mem, i; | |
a649637c | 1550 | |
5b6feee9 BF |
1551 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
1552 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
1553 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 1554 | |
5b6feee9 BF |
1555 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
1556 | if (!new) | |
1557 | return NULL; | |
557ce264 | 1558 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 | 1559 | for (i = 0; i < numslots; i++) { |
55c760cf | 1560 | new->se_slots[i] = kzalloc(slotsize, GFP_KERNEL); |
5b6feee9 | 1561 | if (!new->se_slots[i]) |
557ce264 | 1562 | goto out_free; |
557ce264 | 1563 | } |
60810e54 KM |
1564 | |
1565 | memcpy(&new->se_fchannel, fattrs, sizeof(struct nfsd4_channel_attrs)); | |
1566 | memcpy(&new->se_bchannel, battrs, sizeof(struct nfsd4_channel_attrs)); | |
1567 | ||
5b6feee9 BF |
1568 | return new; |
1569 | out_free: | |
1570 | while (i--) | |
1571 | kfree(new->se_slots[i]); | |
1572 | kfree(new); | |
1573 | return NULL; | |
ec6b5d7b AA |
1574 | } |
1575 | ||
19cf5c02 BF |
1576 | static void free_conn(struct nfsd4_conn *c) |
1577 | { | |
1578 | svc_xprt_put(c->cn_xprt); | |
1579 | kfree(c); | |
1580 | } | |
ec6b5d7b | 1581 | |
19cf5c02 BF |
1582 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
1583 | { | |
1584 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
1585 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 1586 | |
19cf5c02 BF |
1587 | spin_lock(&clp->cl_lock); |
1588 | if (!list_empty(&c->cn_persession)) { | |
1589 | list_del(&c->cn_persession); | |
1590 | free_conn(c); | |
1591 | } | |
eea49806 | 1592 | nfsd4_probe_callback(clp); |
2e4b7239 | 1593 | spin_unlock(&clp->cl_lock); |
19cf5c02 | 1594 | } |
ec6b5d7b | 1595 | |
d29c374c | 1596 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 1597 | { |
c7662518 | 1598 | struct nfsd4_conn *conn; |
ec6b5d7b | 1599 | |
c7662518 BF |
1600 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
1601 | if (!conn) | |
db90681d | 1602 | return NULL; |
c7662518 BF |
1603 | svc_xprt_get(rqstp->rq_xprt); |
1604 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 1605 | conn->cn_flags = flags; |
db90681d BF |
1606 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
1607 | return conn; | |
1608 | } | |
a649637c | 1609 | |
328ead28 BF |
1610 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
1611 | { | |
1612 | conn->cn_session = ses; | |
1613 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
1614 | } |
1615 | ||
db90681d | 1616 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 1617 | { |
db90681d | 1618 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 1619 | |
c7662518 | 1620 | spin_lock(&clp->cl_lock); |
328ead28 | 1621 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 1622 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
1623 | } |
1624 | ||
21b75b01 | 1625 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 1626 | { |
19cf5c02 | 1627 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 1628 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
1629 | } |
1630 | ||
e1ff371f | 1631 | static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses) |
ec6b5d7b | 1632 | { |
21b75b01 | 1633 | int ret; |
ec6b5d7b | 1634 | |
db90681d | 1635 | nfsd4_hash_conn(conn, ses); |
21b75b01 BF |
1636 | ret = nfsd4_register_conn(conn); |
1637 | if (ret) | |
1638 | /* oops; xprt is already down: */ | |
1639 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
57a37144 BF |
1640 | /* We may have gained or lost a callback channel: */ |
1641 | nfsd4_probe_callback_sync(ses->se_client); | |
c7662518 | 1642 | } |
ec6b5d7b | 1643 | |
e1ff371f | 1644 | static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses) |
1d1bc8f2 BF |
1645 | { |
1646 | u32 dir = NFS4_CDFC4_FORE; | |
1647 | ||
e1ff371f | 1648 | if (cses->flags & SESSION4_BACK_CHAN) |
1d1bc8f2 | 1649 | dir |= NFS4_CDFC4_BACK; |
e1ff371f | 1650 | return alloc_conn(rqstp, dir); |
1d1bc8f2 BF |
1651 | } |
1652 | ||
1653 | /* must be called under client_lock */ | |
19cf5c02 | 1654 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 1655 | { |
19cf5c02 BF |
1656 | struct nfs4_client *clp = s->se_client; |
1657 | struct nfsd4_conn *c; | |
ec6b5d7b | 1658 | |
19cf5c02 BF |
1659 | spin_lock(&clp->cl_lock); |
1660 | while (!list_empty(&s->se_conns)) { | |
1661 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
1662 | list_del_init(&c->cn_persession); | |
1663 | spin_unlock(&clp->cl_lock); | |
557ce264 | 1664 | |
19cf5c02 BF |
1665 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
1666 | free_conn(c); | |
ec6b5d7b | 1667 | |
19cf5c02 BF |
1668 | spin_lock(&clp->cl_lock); |
1669 | } | |
1670 | spin_unlock(&clp->cl_lock); | |
c7662518 | 1671 | } |
ec6b5d7b | 1672 | |
1377b69e BF |
1673 | static void __free_session(struct nfsd4_session *ses) |
1674 | { | |
1377b69e BF |
1675 | free_session_slots(ses); |
1676 | kfree(ses); | |
1677 | } | |
1678 | ||
66b2b9b2 | 1679 | static void free_session(struct nfsd4_session *ses) |
c7662518 | 1680 | { |
19cf5c02 | 1681 | nfsd4_del_conns(ses); |
55c760cf | 1682 | nfsd4_put_drc_mem(&ses->se_fchannel); |
1377b69e | 1683 | __free_session(ses); |
c7662518 BF |
1684 | } |
1685 | ||
135ae827 | 1686 | static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
a827bcb2 | 1687 | { |
a827bcb2 | 1688 | int idx; |
1872de0e | 1689 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
a827bcb2 | 1690 | |
ec6b5d7b AA |
1691 | new->se_client = clp; |
1692 | gen_sessionid(new); | |
ec6b5d7b | 1693 | |
c7662518 BF |
1694 | INIT_LIST_HEAD(&new->se_conns); |
1695 | ||
ac7c46f2 | 1696 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 1697 | new->se_flags = cses->flags; |
8b5ce5cd | 1698 | new->se_cb_prog = cses->callback_prog; |
c6bb3ca2 | 1699 | new->se_cb_sec = cses->cb_sec; |
66b2b9b2 | 1700 | atomic_set(&new->se_ref, 0); |
5b6feee9 | 1701 | idx = hash_sessionid(&new->se_sessionid); |
1872de0e | 1702 | list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]); |
4c649378 | 1703 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 1704 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 1705 | spin_unlock(&clp->cl_lock); |
60810e54 | 1706 | |
b0d2e42c | 1707 | { |
edd76786 | 1708 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
1709 | /* |
1710 | * This is a little silly; with sessions there's no real | |
1711 | * use for the callback address. Use the peer address | |
1712 | * as a reasonable default for now, but consider fixing | |
1713 | * the rpc client not to require an address in the | |
1714 | * future: | |
1715 | */ | |
edd76786 BF |
1716 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
1717 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 1718 | } |
ec6b5d7b AA |
1719 | } |
1720 | ||
9089f1b4 | 1721 | /* caller must hold client_lock */ |
5282fd72 | 1722 | static struct nfsd4_session * |
d4e19e70 | 1723 | __find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net) |
5282fd72 ME |
1724 | { |
1725 | struct nfsd4_session *elem; | |
1726 | int idx; | |
1872de0e | 1727 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
5282fd72 | 1728 | |
0a880a28 TM |
1729 | lockdep_assert_held(&nn->client_lock); |
1730 | ||
5282fd72 ME |
1731 | dump_sessionid(__func__, sessionid); |
1732 | idx = hash_sessionid(sessionid); | |
5282fd72 | 1733 | /* Search in the appropriate list */ |
1872de0e | 1734 | list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) { |
5282fd72 ME |
1735 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
1736 | NFS4_MAX_SESSIONID_LEN)) { | |
1737 | return elem; | |
1738 | } | |
1739 | } | |
1740 | ||
1741 | dprintk("%s: session not found\n", __func__); | |
1742 | return NULL; | |
1743 | } | |
1744 | ||
d4e19e70 TM |
1745 | static struct nfsd4_session * |
1746 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net, | |
1747 | __be32 *ret) | |
1748 | { | |
1749 | struct nfsd4_session *session; | |
1750 | __be32 status = nfserr_badsession; | |
1751 | ||
1752 | session = __find_in_sessionid_hashtbl(sessionid, net); | |
1753 | if (!session) | |
1754 | goto out; | |
1755 | status = nfsd4_get_session_locked(session); | |
1756 | if (status) | |
1757 | session = NULL; | |
1758 | out: | |
1759 | *ret = status; | |
1760 | return session; | |
1761 | } | |
1762 | ||
9089f1b4 | 1763 | /* caller must hold client_lock */ |
7116ed6b | 1764 | static void |
5282fd72 | 1765 | unhash_session(struct nfsd4_session *ses) |
7116ed6b | 1766 | { |
0a880a28 TM |
1767 | struct nfs4_client *clp = ses->se_client; |
1768 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
1769 | ||
1770 | lockdep_assert_held(&nn->client_lock); | |
1771 | ||
7116ed6b | 1772 | list_del(&ses->se_hash); |
4c649378 | 1773 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 1774 | list_del(&ses->se_perclnt); |
4c649378 | 1775 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
1776 | } |
1777 | ||
1da177e4 LT |
1778 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
1779 | static int | |
2c142baa | 1780 | STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn) |
1da177e4 | 1781 | { |
bbc7f33a BF |
1782 | /* |
1783 | * We're assuming the clid was not given out from a boot | |
1784 | * precisely 2^32 (about 136 years) before this one. That seems | |
1785 | * a safe assumption: | |
1786 | */ | |
1787 | if (clid->cl_boot == (u32)nn->boot_time) | |
1da177e4 | 1788 | return 0; |
60adfc50 | 1789 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
2c142baa | 1790 | clid->cl_boot, clid->cl_id, nn->boot_time); |
1da177e4 LT |
1791 | return 1; |
1792 | } | |
1793 | ||
1794 | /* | |
1795 | * XXX Should we use a slab cache ? | |
1796 | * This type of memory management is somewhat inefficient, but we use it | |
1797 | * anyway since SETCLIENTID is not a common operation. | |
1798 | */ | |
35bba9a3 | 1799 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
1800 | { |
1801 | struct nfs4_client *clp; | |
d4f0489f | 1802 | int i; |
1da177e4 | 1803 | |
9258a2d5 | 1804 | clp = kmem_cache_zalloc(client_slab, GFP_KERNEL); |
35bba9a3 BF |
1805 | if (clp == NULL) |
1806 | return NULL; | |
67114fe6 | 1807 | clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); |
d4f0489f TM |
1808 | if (clp->cl_name.data == NULL) |
1809 | goto err_no_name; | |
6da2ec56 KC |
1810 | clp->cl_ownerstr_hashtbl = kmalloc_array(OWNER_HASH_SIZE, |
1811 | sizeof(struct list_head), | |
1812 | GFP_KERNEL); | |
d4f0489f TM |
1813 | if (!clp->cl_ownerstr_hashtbl) |
1814 | goto err_no_hashtbl; | |
1815 | for (i = 0; i < OWNER_HASH_SIZE; i++) | |
1816 | INIT_LIST_HEAD(&clp->cl_ownerstr_hashtbl[i]); | |
35bba9a3 | 1817 | clp->cl_name.len = name.len; |
5694c93e TM |
1818 | INIT_LIST_HEAD(&clp->cl_sessions); |
1819 | idr_init(&clp->cl_stateids); | |
1820 | atomic_set(&clp->cl_refcount, 0); | |
1821 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; | |
1822 | INIT_LIST_HEAD(&clp->cl_idhash); | |
1823 | INIT_LIST_HEAD(&clp->cl_openowners); | |
1824 | INIT_LIST_HEAD(&clp->cl_delegations); | |
1825 | INIT_LIST_HEAD(&clp->cl_lru); | |
5694c93e | 1826 | INIT_LIST_HEAD(&clp->cl_revoked); |
9cf514cc CH |
1827 | #ifdef CONFIG_NFSD_PNFS |
1828 | INIT_LIST_HEAD(&clp->cl_lo_states); | |
1829 | #endif | |
5694c93e TM |
1830 | spin_lock_init(&clp->cl_lock); |
1831 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1da177e4 | 1832 | return clp; |
d4f0489f TM |
1833 | err_no_hashtbl: |
1834 | kfree(clp->cl_name.data); | |
1835 | err_no_name: | |
9258a2d5 | 1836 | kmem_cache_free(client_slab, clp); |
d4f0489f | 1837 | return NULL; |
1da177e4 LT |
1838 | } |
1839 | ||
4dd86e15 | 1840 | static void |
1da177e4 LT |
1841 | free_client(struct nfs4_client *clp) |
1842 | { | |
792c95dd BF |
1843 | while (!list_empty(&clp->cl_sessions)) { |
1844 | struct nfsd4_session *ses; | |
1845 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
1846 | se_perclnt); | |
1847 | list_del(&ses->se_perclnt); | |
66b2b9b2 BF |
1848 | WARN_ON_ONCE(atomic_read(&ses->se_ref)); |
1849 | free_session(ses); | |
792c95dd | 1850 | } |
4cb57e30 | 1851 | rpc_destroy_wait_queue(&clp->cl_cb_waitq); |
03a4e1f6 | 1852 | free_svc_cred(&clp->cl_cred); |
d4f0489f | 1853 | kfree(clp->cl_ownerstr_hashtbl); |
1da177e4 | 1854 | kfree(clp->cl_name.data); |
2d32b29a | 1855 | idr_destroy(&clp->cl_stateids); |
9258a2d5 | 1856 | kmem_cache_free(client_slab, clp); |
1da177e4 LT |
1857 | } |
1858 | ||
84d38ac9 | 1859 | /* must be called under the client_lock */ |
4beb345b | 1860 | static void |
84d38ac9 BH |
1861 | unhash_client_locked(struct nfs4_client *clp) |
1862 | { | |
4beb345b | 1863 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
792c95dd BF |
1864 | struct nfsd4_session *ses; |
1865 | ||
0a880a28 TM |
1866 | lockdep_assert_held(&nn->client_lock); |
1867 | ||
4beb345b TM |
1868 | /* Mark the client as expired! */ |
1869 | clp->cl_time = 0; | |
1870 | /* Make it invisible */ | |
1871 | if (!list_empty(&clp->cl_idhash)) { | |
1872 | list_del_init(&clp->cl_idhash); | |
1873 | if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) | |
1874 | rb_erase(&clp->cl_namenode, &nn->conf_name_tree); | |
1875 | else | |
1876 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); | |
1877 | } | |
1878 | list_del_init(&clp->cl_lru); | |
4c649378 | 1879 | spin_lock(&clp->cl_lock); |
792c95dd BF |
1880 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
1881 | list_del_init(&ses->se_hash); | |
4c649378 | 1882 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
1883 | } |
1884 | ||
1da177e4 | 1885 | static void |
4beb345b TM |
1886 | unhash_client(struct nfs4_client *clp) |
1887 | { | |
1888 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
1889 | ||
1890 | spin_lock(&nn->client_lock); | |
1891 | unhash_client_locked(clp); | |
1892 | spin_unlock(&nn->client_lock); | |
1893 | } | |
1894 | ||
97403d95 JL |
1895 | static __be32 mark_client_expired_locked(struct nfs4_client *clp) |
1896 | { | |
1897 | if (atomic_read(&clp->cl_refcount)) | |
1898 | return nfserr_jukebox; | |
1899 | unhash_client_locked(clp); | |
1900 | return nfs_ok; | |
1901 | } | |
1902 | ||
4beb345b TM |
1903 | static void |
1904 | __destroy_client(struct nfs4_client *clp) | |
1da177e4 | 1905 | { |
68ef3bc3 | 1906 | int i; |
fe0750e5 | 1907 | struct nfs4_openowner *oo; |
1da177e4 | 1908 | struct nfs4_delegation *dp; |
1da177e4 LT |
1909 | struct list_head reaplist; |
1910 | ||
1da177e4 | 1911 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 1912 | spin_lock(&state_lock); |
ea1da636 N |
1913 | while (!list_empty(&clp->cl_delegations)) { |
1914 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
3fcbbd24 | 1915 | WARN_ON(!unhash_delegation_locked(dp)); |
42690676 | 1916 | list_add(&dp->dl_recall_lru, &reaplist); |
1da177e4 | 1917 | } |
cdc97505 | 1918 | spin_unlock(&state_lock); |
1da177e4 LT |
1919 | while (!list_empty(&reaplist)) { |
1920 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
42690676 | 1921 | list_del_init(&dp->dl_recall_lru); |
0af6e690 | 1922 | destroy_unhashed_deleg(dp); |
1da177e4 | 1923 | } |
2d4a532d | 1924 | while (!list_empty(&clp->cl_revoked)) { |
c876486b | 1925 | dp = list_entry(clp->cl_revoked.next, struct nfs4_delegation, dl_recall_lru); |
2d4a532d | 1926 | list_del_init(&dp->dl_recall_lru); |
6011695d | 1927 | nfs4_put_stid(&dp->dl_stid); |
956c4fee | 1928 | } |
ea1da636 | 1929 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 | 1930 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
b5971afa | 1931 | nfs4_get_stateowner(&oo->oo_owner); |
fe0750e5 | 1932 | release_openowner(oo); |
1da177e4 | 1933 | } |
68ef3bc3 JL |
1934 | for (i = 0; i < OWNER_HASH_SIZE; i++) { |
1935 | struct nfs4_stateowner *so, *tmp; | |
1936 | ||
1937 | list_for_each_entry_safe(so, tmp, &clp->cl_ownerstr_hashtbl[i], | |
1938 | so_strhash) { | |
1939 | /* Should be no openowners at this point */ | |
1940 | WARN_ON_ONCE(so->so_is_open_owner); | |
1941 | remove_blocked_locks(lockowner(so)); | |
1942 | } | |
1943 | } | |
9cf514cc | 1944 | nfsd4_return_all_client_layouts(clp); |
6ff8da08 | 1945 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
1946 | if (clp->cl_cb_conn.cb_xprt) |
1947 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
221a6876 | 1948 | free_client(clp); |
1da177e4 LT |
1949 | } |
1950 | ||
4beb345b TM |
1951 | static void |
1952 | destroy_client(struct nfs4_client *clp) | |
1953 | { | |
1954 | unhash_client(clp); | |
1955 | __destroy_client(clp); | |
1956 | } | |
1957 | ||
0d22f68f BF |
1958 | static void expire_client(struct nfs4_client *clp) |
1959 | { | |
4beb345b | 1960 | unhash_client(clp); |
0d22f68f | 1961 | nfsd4_client_record_remove(clp); |
4beb345b | 1962 | __destroy_client(clp); |
0d22f68f BF |
1963 | } |
1964 | ||
35bba9a3 BF |
1965 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
1966 | { | |
1967 | memcpy(target->cl_verifier.data, source->data, | |
1968 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
1969 | } |
1970 | ||
35bba9a3 BF |
1971 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
1972 | { | |
1da177e4 LT |
1973 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
1974 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
1975 | } | |
1976 | ||
50043859 BF |
1977 | static int copy_cred(struct svc_cred *target, struct svc_cred *source) |
1978 | { | |
2f10fdcb N |
1979 | target->cr_principal = kstrdup(source->cr_principal, GFP_KERNEL); |
1980 | target->cr_raw_principal = kstrdup(source->cr_raw_principal, | |
1981 | GFP_KERNEL); | |
1982 | if ((source->cr_principal && ! target->cr_principal) || | |
1983 | (source->cr_raw_principal && ! target->cr_raw_principal)) | |
1984 | return -ENOMEM; | |
50043859 | 1985 | |
d5497fc6 | 1986 | target->cr_flavor = source->cr_flavor; |
1da177e4 LT |
1987 | target->cr_uid = source->cr_uid; |
1988 | target->cr_gid = source->cr_gid; | |
1989 | target->cr_group_info = source->cr_group_info; | |
1990 | get_group_info(target->cr_group_info); | |
0dc1531a BF |
1991 | target->cr_gss_mech = source->cr_gss_mech; |
1992 | if (source->cr_gss_mech) | |
1993 | gss_mech_get(source->cr_gss_mech); | |
03a4e1f6 | 1994 | return 0; |
1da177e4 LT |
1995 | } |
1996 | ||
ef17af2a | 1997 | static int |
ac55fdc4 JL |
1998 | compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2) |
1999 | { | |
ef17af2a RV |
2000 | if (o1->len < o2->len) |
2001 | return -1; | |
2002 | if (o1->len > o2->len) | |
2003 | return 1; | |
2004 | return memcmp(o1->data, o2->data, o1->len); | |
ac55fdc4 JL |
2005 | } |
2006 | ||
35bba9a3 | 2007 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 2008 | { |
a55370a3 | 2009 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
2010 | } |
2011 | ||
2012 | static int | |
599e0a22 BF |
2013 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
2014 | { | |
2015 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
2016 | } |
2017 | ||
2018 | static int | |
599e0a22 BF |
2019 | same_clid(clientid_t *cl1, clientid_t *cl2) |
2020 | { | |
2021 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
2022 | } |
2023 | ||
8fbba96e BF |
2024 | static bool groups_equal(struct group_info *g1, struct group_info *g2) |
2025 | { | |
2026 | int i; | |
2027 | ||
2028 | if (g1->ngroups != g2->ngroups) | |
2029 | return false; | |
2030 | for (i=0; i<g1->ngroups; i++) | |
81243eac | 2031 | if (!gid_eq(g1->gid[i], g2->gid[i])) |
8fbba96e BF |
2032 | return false; |
2033 | return true; | |
2034 | } | |
2035 | ||
68eb3508 BF |
2036 | /* |
2037 | * RFC 3530 language requires clid_inuse be returned when the | |
2038 | * "principal" associated with a requests differs from that previously | |
2039 | * used. We use uid, gid's, and gss principal string as our best | |
2040 | * approximation. We also don't want to allow non-gss use of a client | |
2041 | * established using gss: in theory cr_principal should catch that | |
2042 | * change, but in practice cr_principal can be null even in the gss case | |
2043 | * since gssd doesn't always pass down a principal string. | |
2044 | */ | |
2045 | static bool is_gss_cred(struct svc_cred *cr) | |
2046 | { | |
2047 | /* Is cr_flavor one of the gss "pseudoflavors"?: */ | |
2048 | return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR); | |
2049 | } | |
2050 | ||
2051 | ||
5559b50a | 2052 | static bool |
599e0a22 BF |
2053 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
2054 | { | |
68eb3508 | 2055 | if ((is_gss_cred(cr1) != is_gss_cred(cr2)) |
6fab8779 EB |
2056 | || (!uid_eq(cr1->cr_uid, cr2->cr_uid)) |
2057 | || (!gid_eq(cr1->cr_gid, cr2->cr_gid)) | |
8fbba96e BF |
2058 | || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) |
2059 | return false; | |
2060 | if (cr1->cr_principal == cr2->cr_principal) | |
2061 | return true; | |
2062 | if (!cr1->cr_principal || !cr2->cr_principal) | |
2063 | return false; | |
5559b50a | 2064 | return 0 == strcmp(cr1->cr_principal, cr2->cr_principal); |
1da177e4 LT |
2065 | } |
2066 | ||
57266a6e BF |
2067 | static bool svc_rqst_integrity_protected(struct svc_rqst *rqstp) |
2068 | { | |
2069 | struct svc_cred *cr = &rqstp->rq_cred; | |
2070 | u32 service; | |
2071 | ||
c4720591 BF |
2072 | if (!cr->cr_gss_mech) |
2073 | return false; | |
57266a6e BF |
2074 | service = gss_pseudoflavor_to_service(cr->cr_gss_mech, cr->cr_flavor); |
2075 | return service == RPC_GSS_SVC_INTEGRITY || | |
2076 | service == RPC_GSS_SVC_PRIVACY; | |
2077 | } | |
2078 | ||
dedeb13f | 2079 | bool nfsd4_mach_creds_match(struct nfs4_client *cl, struct svc_rqst *rqstp) |
57266a6e BF |
2080 | { |
2081 | struct svc_cred *cr = &rqstp->rq_cred; | |
2082 | ||
2083 | if (!cl->cl_mach_cred) | |
2084 | return true; | |
2085 | if (cl->cl_cred.cr_gss_mech != cr->cr_gss_mech) | |
2086 | return false; | |
2087 | if (!svc_rqst_integrity_protected(rqstp)) | |
2088 | return false; | |
414ca017 BF |
2089 | if (cl->cl_cred.cr_raw_principal) |
2090 | return 0 == strcmp(cl->cl_cred.cr_raw_principal, | |
2091 | cr->cr_raw_principal); | |
57266a6e BF |
2092 | if (!cr->cr_principal) |
2093 | return false; | |
2094 | return 0 == strcmp(cl->cl_cred.cr_principal, cr->cr_principal); | |
2095 | } | |
2096 | ||
294ac32e | 2097 | static void gen_confirm(struct nfs4_client *clp, struct nfsd_net *nn) |
deda2faa | 2098 | { |
ab4684d1 | 2099 | __be32 verf[2]; |
1da177e4 | 2100 | |
f419992c JL |
2101 | /* |
2102 | * This is opaque to client, so no need to byte-swap. Use | |
2103 | * __force to keep sparse happy | |
2104 | */ | |
2105 | verf[0] = (__force __be32)get_seconds(); | |
19311aa8 | 2106 | verf[1] = (__force __be32)nn->clverifier_counter++; |
ab4684d1 | 2107 | memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); |
1da177e4 LT |
2108 | } |
2109 | ||
294ac32e JL |
2110 | static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn) |
2111 | { | |
2112 | clp->cl_clientid.cl_boot = nn->boot_time; | |
2113 | clp->cl_clientid.cl_id = nn->clientid_counter++; | |
2114 | gen_confirm(clp, nn); | |
2115 | } | |
2116 | ||
4770d722 JL |
2117 | static struct nfs4_stid * |
2118 | find_stateid_locked(struct nfs4_client *cl, stateid_t *t) | |
4581d140 | 2119 | { |
3abdb607 BF |
2120 | struct nfs4_stid *ret; |
2121 | ||
2122 | ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id); | |
2123 | if (!ret || !ret->sc_type) | |
2124 | return NULL; | |
2125 | return ret; | |
4d71ab87 BF |
2126 | } |
2127 | ||
4770d722 JL |
2128 | static struct nfs4_stid * |
2129 | find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) | |
f459e453 BF |
2130 | { |
2131 | struct nfs4_stid *s; | |
4d71ab87 | 2132 | |
4770d722 JL |
2133 | spin_lock(&cl->cl_lock); |
2134 | s = find_stateid_locked(cl, t); | |
2d3f9668 TM |
2135 | if (s != NULL) { |
2136 | if (typemask & s->sc_type) | |
a15dfcd5 | 2137 | refcount_inc(&s->sc_count); |
2d3f9668 TM |
2138 | else |
2139 | s = NULL; | |
2140 | } | |
4770d722 JL |
2141 | spin_unlock(&cl->cl_lock); |
2142 | return s; | |
4581d140 BF |
2143 | } |
2144 | ||
2216d449 | 2145 | static struct nfs4_client *create_client(struct xdr_netobj name, |
b09333c4 RL |
2146 | struct svc_rqst *rqstp, nfs4_verifier *verf) |
2147 | { | |
2148 | struct nfs4_client *clp; | |
2149 | struct sockaddr *sa = svc_addr(rqstp); | |
03a4e1f6 | 2150 | int ret; |
c212cecf | 2151 | struct net *net = SVC_NET(rqstp); |
b09333c4 RL |
2152 | |
2153 | clp = alloc_client(name); | |
2154 | if (clp == NULL) | |
2155 | return NULL; | |
2156 | ||
03a4e1f6 BF |
2157 | ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); |
2158 | if (ret) { | |
03a4e1f6 | 2159 | free_client(clp); |
03a4e1f6 | 2160 | return NULL; |
b09333c4 | 2161 | } |
0162ac2b | 2162 | nfsd4_init_cb(&clp->cl_cb_null, clp, NULL, NFSPROC4_CLNT_CB_NULL); |
07cd4909 | 2163 | clp->cl_time = get_seconds(); |
b09333c4 | 2164 | clear_bit(0, &clp->cl_cb_slot_busy); |
b09333c4 RL |
2165 | copy_verf(clp, verf); |
2166 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
edd76786 | 2167 | clp->cl_cb_session = NULL; |
c212cecf | 2168 | clp->net = net; |
b09333c4 RL |
2169 | return clp; |
2170 | } | |
2171 | ||
fd39ca9a | 2172 | static void |
ac55fdc4 JL |
2173 | add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root) |
2174 | { | |
2175 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
2176 | struct nfs4_client *clp; | |
2177 | ||
2178 | while (*new) { | |
2179 | clp = rb_entry(*new, struct nfs4_client, cl_namenode); | |
2180 | parent = *new; | |
2181 | ||
2182 | if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0) | |
2183 | new = &((*new)->rb_left); | |
2184 | else | |
2185 | new = &((*new)->rb_right); | |
2186 | } | |
2187 | ||
2188 | rb_link_node(&new_clp->cl_namenode, parent, new); | |
2189 | rb_insert_color(&new_clp->cl_namenode, root); | |
2190 | } | |
2191 | ||
2192 | static struct nfs4_client * | |
2193 | find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root) | |
2194 | { | |
ef17af2a | 2195 | int cmp; |
ac55fdc4 JL |
2196 | struct rb_node *node = root->rb_node; |
2197 | struct nfs4_client *clp; | |
2198 | ||
2199 | while (node) { | |
2200 | clp = rb_entry(node, struct nfs4_client, cl_namenode); | |
2201 | cmp = compare_blob(&clp->cl_name, name); | |
2202 | if (cmp > 0) | |
2203 | node = node->rb_left; | |
2204 | else if (cmp < 0) | |
2205 | node = node->rb_right; | |
2206 | else | |
2207 | return clp; | |
2208 | } | |
2209 | return NULL; | |
2210 | } | |
2211 | ||
2212 | static void | |
2213 | add_to_unconfirmed(struct nfs4_client *clp) | |
1da177e4 LT |
2214 | { |
2215 | unsigned int idhashval; | |
0a7ec377 | 2216 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 2217 | |
0a880a28 TM |
2218 | lockdep_assert_held(&nn->client_lock); |
2219 | ||
ac55fdc4 | 2220 | clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
a99454aa | 2221 | add_clp_to_name_tree(clp, &nn->unconf_name_tree); |
1da177e4 | 2222 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
0a7ec377 | 2223 | list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]); |
3dbacee6 | 2224 | renew_client_locked(clp); |
1da177e4 LT |
2225 | } |
2226 | ||
fd39ca9a | 2227 | static void |
1da177e4 LT |
2228 | move_to_confirmed(struct nfs4_client *clp) |
2229 | { | |
2230 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
8daae4dc | 2231 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 2232 | |
0a880a28 TM |
2233 | lockdep_assert_held(&nn->client_lock); |
2234 | ||
1da177e4 | 2235 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); |
8daae4dc | 2236 | list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]); |
a99454aa | 2237 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
382a62e7 | 2238 | add_clp_to_name_tree(clp, &nn->conf_name_tree); |
ac55fdc4 | 2239 | set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
3dbacee6 | 2240 | renew_client_locked(clp); |
1da177e4 LT |
2241 | } |
2242 | ||
2243 | static struct nfs4_client * | |
bfa85e83 | 2244 | find_client_in_id_table(struct list_head *tbl, clientid_t *clid, bool sessions) |
1da177e4 LT |
2245 | { |
2246 | struct nfs4_client *clp; | |
2247 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
2248 | ||
bfa85e83 | 2249 | list_for_each_entry(clp, &tbl[idhashval], cl_idhash) { |
a50d2ad1 | 2250 | if (same_clid(&clp->cl_clientid, clid)) { |
d15c077e BF |
2251 | if ((bool)clp->cl_minorversion != sessions) |
2252 | return NULL; | |
3dbacee6 | 2253 | renew_client_locked(clp); |
1da177e4 | 2254 | return clp; |
a50d2ad1 | 2255 | } |
1da177e4 LT |
2256 | } |
2257 | return NULL; | |
2258 | } | |
2259 | ||
bfa85e83 BF |
2260 | static struct nfs4_client * |
2261 | find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) | |
2262 | { | |
2263 | struct list_head *tbl = nn->conf_id_hashtbl; | |
2264 | ||
0a880a28 | 2265 | lockdep_assert_held(&nn->client_lock); |
bfa85e83 BF |
2266 | return find_client_in_id_table(tbl, clid, sessions); |
2267 | } | |
2268 | ||
1da177e4 | 2269 | static struct nfs4_client * |
0a7ec377 | 2270 | find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
1da177e4 | 2271 | { |
bfa85e83 | 2272 | struct list_head *tbl = nn->unconf_id_hashtbl; |
1da177e4 | 2273 | |
0a880a28 | 2274 | lockdep_assert_held(&nn->client_lock); |
bfa85e83 | 2275 | return find_client_in_id_table(tbl, clid, sessions); |
1da177e4 LT |
2276 | } |
2277 | ||
6e5f15c9 | 2278 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 2279 | { |
6e5f15c9 | 2280 | return clp->cl_exchange_flags != 0; |
e203d506 | 2281 | } |
a1bcecd2 | 2282 | |
28ce6054 | 2283 | static struct nfs4_client * |
382a62e7 | 2284 | find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 2285 | { |
0a880a28 | 2286 | lockdep_assert_held(&nn->client_lock); |
382a62e7 | 2287 | return find_clp_in_name_tree(name, &nn->conf_name_tree); |
28ce6054 N |
2288 | } |
2289 | ||
2290 | static struct nfs4_client * | |
a99454aa | 2291 | find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 2292 | { |
0a880a28 | 2293 | lockdep_assert_held(&nn->client_lock); |
a99454aa | 2294 | return find_clp_in_name_tree(name, &nn->unconf_name_tree); |
28ce6054 N |
2295 | } |
2296 | ||
fd39ca9a | 2297 | static void |
6f3d772f | 2298 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 2299 | { |
07263f1e | 2300 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
2301 | struct sockaddr *sa = svc_addr(rqstp); |
2302 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
2303 | unsigned short expected_family; |
2304 | ||
2305 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
2306 | if (se->se_callback_netid_len == 3 && | |
2307 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
2308 | expected_family = AF_INET; | |
2309 | else if (se->se_callback_netid_len == 4 && | |
2310 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
2311 | expected_family = AF_INET6; | |
2312 | else | |
1da177e4 LT |
2313 | goto out_err; |
2314 | ||
c212cecf | 2315 | conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val, |
aa9a4ec7 | 2316 | se->se_callback_addr_len, |
07263f1e BF |
2317 | (struct sockaddr *)&conn->cb_addr, |
2318 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 2319 | |
07263f1e | 2320 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 2321 | goto out_err; |
aa9a4ec7 | 2322 | |
07263f1e BF |
2323 | if (conn->cb_addr.ss_family == AF_INET6) |
2324 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 2325 | |
07263f1e BF |
2326 | conn->cb_prog = se->se_callback_prog; |
2327 | conn->cb_ident = se->se_callback_ident; | |
849a1cf1 | 2328 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
1da177e4 LT |
2329 | return; |
2330 | out_err: | |
07263f1e BF |
2331 | conn->cb_addr.ss_family = AF_UNSPEC; |
2332 | conn->cb_addrlen = 0; | |
4ab495bf | 2333 | dprintk("NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
2334 | "will not receive delegations\n", |
2335 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
2336 | ||
1da177e4 LT |
2337 | return; |
2338 | } | |
2339 | ||
074fe897 | 2340 | /* |
067e1ace | 2341 | * Cache a reply. nfsd4_check_resp_size() has bounded the cache size. |
074fe897 | 2342 | */ |
b607664e | 2343 | static void |
074fe897 | 2344 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) |
074fe897 | 2345 | { |
f5236013 | 2346 | struct xdr_buf *buf = resp->xdr.buf; |
557ce264 AA |
2347 | struct nfsd4_slot *slot = resp->cstate.slot; |
2348 | unsigned int base; | |
074fe897 | 2349 | |
557ce264 | 2350 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 2351 | |
085def3a | 2352 | slot->sl_flags |= NFSD4_SLOT_INITIALIZED; |
557ce264 AA |
2353 | slot->sl_opcnt = resp->opcnt; |
2354 | slot->sl_status = resp->cstate.status; | |
53da6a53 BF |
2355 | free_svc_cred(&slot->sl_cred); |
2356 | copy_cred(&slot->sl_cred, &resp->rqstp->rq_cred); | |
074fe897 | 2357 | |
085def3a BF |
2358 | if (!nfsd4_cache_this(resp)) { |
2359 | slot->sl_flags &= ~NFSD4_SLOT_CACHED; | |
bf864a31 | 2360 | return; |
074fe897 | 2361 | } |
085def3a BF |
2362 | slot->sl_flags |= NFSD4_SLOT_CACHED; |
2363 | ||
f5236013 BF |
2364 | base = resp->cstate.data_offset; |
2365 | slot->sl_datalen = buf->len - base; | |
2366 | if (read_bytes_from_xdr_buf(buf, base, slot->sl_data, slot->sl_datalen)) | |
d3f03403 DC |
2367 | WARN(1, "%s: sessions DRC could not cache compound\n", |
2368 | __func__); | |
557ce264 | 2369 | return; |
074fe897 AA |
2370 | } |
2371 | ||
2372 | /* | |
abfabf8c AA |
2373 | * Encode the replay sequence operation from the slot values. |
2374 | * If cachethis is FALSE encode the uncached rep error on the next | |
2375 | * operation which sets resp->p and increments resp->opcnt for | |
2376 | * nfs4svc_encode_compoundres. | |
074fe897 | 2377 | * |
074fe897 | 2378 | */ |
abfabf8c AA |
2379 | static __be32 |
2380 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
2381 | struct nfsd4_compoundres *resp) | |
074fe897 | 2382 | { |
abfabf8c AA |
2383 | struct nfsd4_op *op; |
2384 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 2385 | |
abfabf8c AA |
2386 | /* Encode the replayed sequence operation */ |
2387 | op = &args->ops[resp->opcnt - 1]; | |
2388 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 2389 | |
085def3a BF |
2390 | if (slot->sl_flags & NFSD4_SLOT_CACHED) |
2391 | return op->status; | |
2392 | if (args->opcnt == 1) { | |
2393 | /* | |
2394 | * The original operation wasn't a solo sequence--we | |
2395 | * always cache those--so this retry must not match the | |
2396 | * original: | |
2397 | */ | |
2398 | op->status = nfserr_seq_false_retry; | |
2399 | } else { | |
abfabf8c AA |
2400 | op = &args->ops[resp->opcnt++]; |
2401 | op->status = nfserr_retry_uncached_rep; | |
2402 | nfsd4_encode_operation(resp, op); | |
074fe897 | 2403 | } |
abfabf8c | 2404 | return op->status; |
074fe897 AA |
2405 | } |
2406 | ||
2407 | /* | |
557ce264 AA |
2408 | * The sequence operation is not cached because we can use the slot and |
2409 | * session values. | |
074fe897 | 2410 | */ |
3ca2eb98 | 2411 | static __be32 |
bf864a31 AA |
2412 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
2413 | struct nfsd4_sequence *seq) | |
074fe897 | 2414 | { |
557ce264 | 2415 | struct nfsd4_slot *slot = resp->cstate.slot; |
f5236013 BF |
2416 | struct xdr_stream *xdr = &resp->xdr; |
2417 | __be32 *p; | |
074fe897 AA |
2418 | __be32 status; |
2419 | ||
557ce264 | 2420 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 2421 | |
abfabf8c | 2422 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); |
0da7b19c | 2423 | if (status) |
abfabf8c | 2424 | return status; |
074fe897 | 2425 | |
f5236013 BF |
2426 | p = xdr_reserve_space(xdr, slot->sl_datalen); |
2427 | if (!p) { | |
2428 | WARN_ON_ONCE(1); | |
2429 | return nfserr_serverfault; | |
2430 | } | |
2431 | xdr_encode_opaque_fixed(p, slot->sl_data, slot->sl_datalen); | |
2432 | xdr_commit_encode(xdr); | |
074fe897 | 2433 | |
557ce264 | 2434 | resp->opcnt = slot->sl_opcnt; |
f5236013 | 2435 | return slot->sl_status; |
074fe897 AA |
2436 | } |
2437 | ||
0733d213 AA |
2438 | /* |
2439 | * Set the exchange_id flags returned by the server. | |
2440 | */ | |
2441 | static void | |
2442 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
2443 | { | |
9cf514cc CH |
2444 | #ifdef CONFIG_NFSD_PNFS |
2445 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_PNFS_MDS; | |
2446 | #else | |
0733d213 | 2447 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; |
9cf514cc | 2448 | #endif |
0733d213 AA |
2449 | |
2450 | /* Referrals are supported, Migration is not. */ | |
2451 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
2452 | ||
2453 | /* set the wire flags to return to client. */ | |
2454 | clid->flags = new->cl_exchange_flags; | |
2455 | } | |
2456 | ||
4eaea134 BF |
2457 | static bool client_has_openowners(struct nfs4_client *clp) |
2458 | { | |
2459 | struct nfs4_openowner *oo; | |
2460 | ||
2461 | list_for_each_entry(oo, &clp->cl_openowners, oo_perclient) { | |
2462 | if (!list_empty(&oo->oo_owner.so_stateids)) | |
2463 | return true; | |
2464 | } | |
2465 | return false; | |
2466 | } | |
2467 | ||
631fc9ea BF |
2468 | static bool client_has_state(struct nfs4_client *clp) |
2469 | { | |
4eaea134 | 2470 | return client_has_openowners(clp) |
47e970be KM |
2471 | #ifdef CONFIG_NFSD_PNFS |
2472 | || !list_empty(&clp->cl_lo_states) | |
2473 | #endif | |
6eccece9 BF |
2474 | || !list_empty(&clp->cl_delegations) |
2475 | || !list_empty(&clp->cl_sessions); | |
631fc9ea BF |
2476 | } |
2477 | ||
069b6ad4 | 2478 | __be32 |
eb69853d CH |
2479 | nfsd4_exchange_id(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2480 | union nfsd4_op_u *u) | |
069b6ad4 | 2481 | { |
eb69853d | 2482 | struct nfsd4_exchange_id *exid = &u->exchange_id; |
3dbacee6 TM |
2483 | struct nfs4_client *conf, *new; |
2484 | struct nfs4_client *unconf = NULL; | |
57b7b43b | 2485 | __be32 status; |
363168b4 | 2486 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 2487 | nfs4_verifier verf = exid->verifier; |
363168b4 | 2488 | struct sockaddr *sa = svc_addr(rqstp); |
83e08fd4 | 2489 | bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; |
c212cecf | 2490 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
0733d213 | 2491 | |
363168b4 | 2492 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 2493 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 2494 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 2495 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 2496 | addr_str, exid->flags, exid->spa_how); |
0733d213 | 2497 | |
a084daf5 | 2498 | if (exid->flags & ~EXCHGID4_FLAG_MASK_A) |
0733d213 AA |
2499 | return nfserr_inval; |
2500 | ||
50c7b948 BF |
2501 | new = create_client(exid->clname, rqstp, &verf); |
2502 | if (new == NULL) | |
2503 | return nfserr_jukebox; | |
2504 | ||
0733d213 | 2505 | switch (exid->spa_how) { |
57266a6e | 2506 | case SP4_MACH_CRED: |
ed941643 AE |
2507 | exid->spo_must_enforce[0] = 0; |
2508 | exid->spo_must_enforce[1] = ( | |
2509 | 1 << (OP_BIND_CONN_TO_SESSION - 32) | | |
2510 | 1 << (OP_EXCHANGE_ID - 32) | | |
2511 | 1 << (OP_CREATE_SESSION - 32) | | |
2512 | 1 << (OP_DESTROY_SESSION - 32) | | |
2513 | 1 << (OP_DESTROY_CLIENTID - 32)); | |
2514 | ||
2515 | exid->spo_must_allow[0] &= (1 << (OP_CLOSE) | | |
2516 | 1 << (OP_OPEN_DOWNGRADE) | | |
2517 | 1 << (OP_LOCKU) | | |
2518 | 1 << (OP_DELEGRETURN)); | |
2519 | ||
2520 | exid->spo_must_allow[1] &= ( | |
2521 | 1 << (OP_TEST_STATEID - 32) | | |
2522 | 1 << (OP_FREE_STATEID - 32)); | |
50c7b948 BF |
2523 | if (!svc_rqst_integrity_protected(rqstp)) { |
2524 | status = nfserr_inval; | |
2525 | goto out_nolock; | |
920dd9bb BF |
2526 | } |
2527 | /* | |
2528 | * Sometimes userspace doesn't give us a principal. | |
2529 | * Which is a bug, really. Anyway, we can't enforce | |
2530 | * MACH_CRED in that case, better to give up now: | |
2531 | */ | |
414ca017 BF |
2532 | if (!new->cl_cred.cr_principal && |
2533 | !new->cl_cred.cr_raw_principal) { | |
920dd9bb BF |
2534 | status = nfserr_serverfault; |
2535 | goto out_nolock; | |
50c7b948 BF |
2536 | } |
2537 | new->cl_mach_cred = true; | |
0733d213 AA |
2538 | case SP4_NONE: |
2539 | break; | |
063b0fb9 BF |
2540 | default: /* checked by xdr code */ |
2541 | WARN_ON_ONCE(1); | |
0733d213 | 2542 | case SP4_SSV: |
8edf4b02 KM |
2543 | status = nfserr_encr_alg_unsupp; |
2544 | goto out_nolock; | |
0733d213 AA |
2545 | } |
2546 | ||
2dbb269d | 2547 | /* Cases below refer to rfc 5661 section 18.35.4: */ |
3dbacee6 | 2548 | spin_lock(&nn->client_lock); |
382a62e7 | 2549 | conf = find_confirmed_client_by_name(&exid->clname, nn); |
0733d213 | 2550 | if (conf) { |
83e08fd4 BF |
2551 | bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); |
2552 | bool verfs_match = same_verf(&verf, &conf->cl_verifier); | |
2553 | ||
136e658d BF |
2554 | if (update) { |
2555 | if (!clp_used_exchangeid(conf)) { /* buggy client */ | |
2dbb269d | 2556 | status = nfserr_inval; |
1a308118 BF |
2557 | goto out; |
2558 | } | |
dedeb13f | 2559 | if (!nfsd4_mach_creds_match(conf, rqstp)) { |
57266a6e BF |
2560 | status = nfserr_wrong_cred; |
2561 | goto out; | |
2562 | } | |
136e658d | 2563 | if (!creds_match) { /* case 9 */ |
ea236d07 | 2564 | status = nfserr_perm; |
136e658d BF |
2565 | goto out; |
2566 | } | |
2567 | if (!verfs_match) { /* case 8 */ | |
0733d213 AA |
2568 | status = nfserr_not_same; |
2569 | goto out; | |
2570 | } | |
136e658d BF |
2571 | /* case 6 */ |
2572 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
136e658d | 2573 | goto out_copy; |
0733d213 | 2574 | } |
136e658d | 2575 | if (!creds_match) { /* case 3 */ |
631fc9ea BF |
2576 | if (client_has_state(conf)) { |
2577 | status = nfserr_clid_inuse; | |
0733d213 AA |
2578 | goto out; |
2579 | } | |
0733d213 AA |
2580 | goto out_new; |
2581 | } | |
136e658d | 2582 | if (verfs_match) { /* case 2 */ |
0f1ba0ef | 2583 | conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; |
136e658d BF |
2584 | goto out_copy; |
2585 | } | |
2586 | /* case 5, client reboot */ | |
3dbacee6 | 2587 | conf = NULL; |
136e658d | 2588 | goto out_new; |
6ddbbbfe MS |
2589 | } |
2590 | ||
2dbb269d | 2591 | if (update) { /* case 7 */ |
6ddbbbfe MS |
2592 | status = nfserr_noent; |
2593 | goto out; | |
0733d213 AA |
2594 | } |
2595 | ||
a99454aa | 2596 | unconf = find_unconfirmed_client_by_name(&exid->clname, nn); |
2dbb269d | 2597 | if (unconf) /* case 4, possible retry or client restart */ |
3dbacee6 | 2598 | unhash_client_locked(unconf); |
0733d213 | 2599 | |
2dbb269d | 2600 | /* case 1 (normal case) */ |
0733d213 | 2601 | out_new: |
fd699b8a JL |
2602 | if (conf) { |
2603 | status = mark_client_expired_locked(conf); | |
2604 | if (status) | |
2605 | goto out; | |
2606 | } | |
4f540e29 | 2607 | new->cl_minorversion = cstate->minorversion; |
ed941643 AE |
2608 | new->cl_spo_must_allow.u.words[0] = exid->spo_must_allow[0]; |
2609 | new->cl_spo_must_allow.u.words[1] = exid->spo_must_allow[1]; | |
0733d213 | 2610 | |
c212cecf | 2611 | gen_clid(new, nn); |
ac55fdc4 | 2612 | add_to_unconfirmed(new); |
3dbacee6 | 2613 | swap(new, conf); |
0733d213 | 2614 | out_copy: |
5cc40fd7 TM |
2615 | exid->clientid.cl_boot = conf->cl_clientid.cl_boot; |
2616 | exid->clientid.cl_id = conf->cl_clientid.cl_id; | |
0733d213 | 2617 | |
5cc40fd7 TM |
2618 | exid->seqid = conf->cl_cs_slot.sl_seqid + 1; |
2619 | nfsd4_set_ex_flags(conf, exid); | |
0733d213 AA |
2620 | |
2621 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
5cc40fd7 | 2622 | conf->cl_cs_slot.sl_seqid, conf->cl_exchange_flags); |
0733d213 AA |
2623 | status = nfs_ok; |
2624 | ||
2625 | out: | |
3dbacee6 | 2626 | spin_unlock(&nn->client_lock); |
50c7b948 | 2627 | out_nolock: |
5cc40fd7 | 2628 | if (new) |
3dbacee6 TM |
2629 | expire_client(new); |
2630 | if (unconf) | |
2631 | expire_client(unconf); | |
0733d213 | 2632 | return status; |
069b6ad4 AA |
2633 | } |
2634 | ||
57b7b43b | 2635 | static __be32 |
88e588d5 | 2636 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 2637 | { |
88e588d5 AA |
2638 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
2639 | slot_seqid); | |
b85d4c01 BH |
2640 | |
2641 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
2642 | if (slot_inuse) { |
2643 | if (seqid == slot_seqid) | |
b85d4c01 BH |
2644 | return nfserr_jukebox; |
2645 | else | |
2646 | return nfserr_seq_misordered; | |
2647 | } | |
f6d82485 | 2648 | /* Note unsigned 32-bit arithmetic handles wraparound: */ |
88e588d5 | 2649 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 | 2650 | return nfs_ok; |
88e588d5 | 2651 | if (seqid == slot_seqid) |
b85d4c01 | 2652 | return nfserr_replay_cache; |
b85d4c01 BH |
2653 | return nfserr_seq_misordered; |
2654 | } | |
2655 | ||
49557cc7 AA |
2656 | /* |
2657 | * Cache the create session result into the create session single DRC | |
2658 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
2659 | * Do this for solo or embedded create session operations. | |
2660 | */ | |
2661 | static void | |
2662 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
57b7b43b | 2663 | struct nfsd4_clid_slot *slot, __be32 nfserr) |
49557cc7 AA |
2664 | { |
2665 | slot->sl_status = nfserr; | |
2666 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
2667 | } | |
2668 | ||
2669 | static __be32 | |
2670 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
2671 | struct nfsd4_clid_slot *slot) | |
2672 | { | |
2673 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
2674 | return slot->sl_status; | |
2675 | } | |
2676 | ||
1b74c25b MJ |
2677 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
2678 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
2679 | 1 + /* MIN tag is length with zero, only length */ \ | |
2680 | 3 + /* version, opcount, opcode */ \ | |
2681 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
2682 | /* seqid, slotID, slotID, cache */ \ | |
2683 | 4 ) * sizeof(__be32)) | |
2684 | ||
2685 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
2686 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
2687 | 1 + /* status */ \ | |
2688 | 1 + /* MIN tag is length with zero, only length */ \ | |
2689 | 3 + /* opcount, opcode, opstatus*/ \ | |
2690 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
2691 | /* seqid, slotID, slotID, slotID, status */ \ | |
2692 | 5 ) * sizeof(__be32)) | |
2693 | ||
55c760cf | 2694 | static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs *ca, struct nfsd_net *nn) |
1b74c25b | 2695 | { |
55c760cf BF |
2696 | u32 maxrpc = nn->nfsd_serv->sv_max_mesg; |
2697 | ||
373cd409 BF |
2698 | if (ca->maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ) |
2699 | return nfserr_toosmall; | |
2700 | if (ca->maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ) | |
2701 | return nfserr_toosmall; | |
55c760cf BF |
2702 | ca->headerpadsz = 0; |
2703 | ca->maxreq_sz = min_t(u32, ca->maxreq_sz, maxrpc); | |
2704 | ca->maxresp_sz = min_t(u32, ca->maxresp_sz, maxrpc); | |
2705 | ca->maxops = min_t(u32, ca->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
2706 | ca->maxresp_cached = min_t(u32, ca->maxresp_cached, | |
2707 | NFSD_SLOT_CACHE_SIZE + NFSD_MIN_HDR_SEQ_SZ); | |
2708 | ca->maxreqs = min_t(u32, ca->maxreqs, NFSD_MAX_SLOTS_PER_SESSION); | |
2709 | /* | |
2710 | * Note decreasing slot size below client's request may make it | |
2711 | * difficult for client to function correctly, whereas | |
2712 | * decreasing the number of slots will (just?) affect | |
2713 | * performance. When short on memory we therefore prefer to | |
2714 | * decrease number of slots instead of their size. Clients that | |
2715 | * request larger slots than they need will get poor results: | |
2716 | */ | |
2717 | ca->maxreqs = nfsd4_get_drc_mem(ca); | |
2718 | if (!ca->maxreqs) | |
2719 | return nfserr_jukebox; | |
2720 | ||
373cd409 | 2721 | return nfs_ok; |
1b74c25b MJ |
2722 | } |
2723 | ||
4500632f CL |
2724 | /* |
2725 | * Server's NFSv4.1 backchannel support is AUTH_SYS-only for now. | |
2726 | * These are based on similar macros in linux/sunrpc/msg_prot.h . | |
2727 | */ | |
2728 | #define RPC_MAX_HEADER_WITH_AUTH_SYS \ | |
2729 | (RPC_CALLHDRSIZE + 2 * (2 + UNX_CALLSLACK)) | |
2730 | ||
2731 | #define RPC_MAX_REPHEADER_WITH_AUTH_SYS \ | |
2732 | (RPC_REPHDRSIZE + (2 + NUL_REPLYSLACK)) | |
2733 | ||
8a891633 | 2734 | #define NFSD_CB_MAX_REQ_SZ ((NFS4_enc_cb_recall_sz + \ |
4500632f | 2735 | RPC_MAX_HEADER_WITH_AUTH_SYS) * sizeof(__be32)) |
8a891633 | 2736 | #define NFSD_CB_MAX_RESP_SZ ((NFS4_dec_cb_recall_sz + \ |
4500632f CL |
2737 | RPC_MAX_REPHEADER_WITH_AUTH_SYS) * \ |
2738 | sizeof(__be32)) | |
8a891633 | 2739 | |
06b332a5 | 2740 | static __be32 check_backchannel_attrs(struct nfsd4_channel_attrs *ca) |
1b74c25b | 2741 | { |
06b332a5 BF |
2742 | ca->headerpadsz = 0; |
2743 | ||
8a891633 | 2744 | if (ca->maxreq_sz < NFSD_CB_MAX_REQ_SZ) |
06b332a5 | 2745 | return nfserr_toosmall; |
8a891633 | 2746 | if (ca->maxresp_sz < NFSD_CB_MAX_RESP_SZ) |
06b332a5 BF |
2747 | return nfserr_toosmall; |
2748 | ca->maxresp_cached = 0; | |
2749 | if (ca->maxops < 2) | |
2750 | return nfserr_toosmall; | |
2751 | ||
2752 | return nfs_ok; | |
1b74c25b MJ |
2753 | } |
2754 | ||
b78724b7 BF |
2755 | static __be32 nfsd4_check_cb_sec(struct nfsd4_cb_sec *cbs) |
2756 | { | |
2757 | switch (cbs->flavor) { | |
2758 | case RPC_AUTH_NULL: | |
2759 | case RPC_AUTH_UNIX: | |
2760 | return nfs_ok; | |
2761 | default: | |
2762 | /* | |
2763 | * GSS case: the spec doesn't allow us to return this | |
2764 | * error. But it also doesn't allow us not to support | |
2765 | * GSS. | |
2766 | * I'd rather this fail hard than return some error the | |
2767 | * client might think it can already handle: | |
2768 | */ | |
2769 | return nfserr_encr_alg_unsupp; | |
2770 | } | |
2771 | } | |
2772 | ||
069b6ad4 AA |
2773 | __be32 |
2774 | nfsd4_create_session(struct svc_rqst *rqstp, | |
eb69853d | 2775 | struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) |
069b6ad4 | 2776 | { |
eb69853d | 2777 | struct nfsd4_create_session *cr_ses = &u->create_session; |
363168b4 | 2778 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 2779 | struct nfs4_client *conf, *unconf; |
d20c11d8 | 2780 | struct nfs4_client *old = NULL; |
ac7c46f2 | 2781 | struct nfsd4_session *new; |
81f0b2a4 | 2782 | struct nfsd4_conn *conn; |
49557cc7 | 2783 | struct nfsd4_clid_slot *cs_slot = NULL; |
57b7b43b | 2784 | __be32 status = 0; |
8daae4dc | 2785 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
ec6b5d7b | 2786 | |
a62573dc MJ |
2787 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
2788 | return nfserr_inval; | |
b78724b7 BF |
2789 | status = nfsd4_check_cb_sec(&cr_ses->cb_sec); |
2790 | if (status) | |
2791 | return status; | |
55c760cf | 2792 | status = check_forechannel_attrs(&cr_ses->fore_channel, nn); |
06b332a5 BF |
2793 | if (status) |
2794 | return status; | |
2795 | status = check_backchannel_attrs(&cr_ses->back_channel); | |
373cd409 | 2796 | if (status) |
f403e450 | 2797 | goto out_release_drc_mem; |
81f0b2a4 | 2798 | status = nfserr_jukebox; |
60810e54 | 2799 | new = alloc_session(&cr_ses->fore_channel, &cr_ses->back_channel); |
55c760cf BF |
2800 | if (!new) |
2801 | goto out_release_drc_mem; | |
81f0b2a4 BF |
2802 | conn = alloc_conn_from_crses(rqstp, cr_ses); |
2803 | if (!conn) | |
2804 | goto out_free_session; | |
a62573dc | 2805 | |
d20c11d8 | 2806 | spin_lock(&nn->client_lock); |
0a7ec377 | 2807 | unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn); |
8daae4dc | 2808 | conf = find_confirmed_client(&cr_ses->clientid, true, nn); |
78389046 | 2809 | WARN_ON_ONCE(conf && unconf); |
ec6b5d7b AA |
2810 | |
2811 | if (conf) { | |
57266a6e | 2812 | status = nfserr_wrong_cred; |
dedeb13f | 2813 | if (!nfsd4_mach_creds_match(conf, rqstp)) |
57266a6e | 2814 | goto out_free_conn; |
49557cc7 AA |
2815 | cs_slot = &conf->cl_cs_slot; |
2816 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
f5e22bb6 KM |
2817 | if (status) { |
2818 | if (status == nfserr_replay_cache) | |
2819 | status = nfsd4_replay_create_session(cr_ses, cs_slot); | |
81f0b2a4 | 2820 | goto out_free_conn; |
ec6b5d7b | 2821 | } |
ec6b5d7b AA |
2822 | } else if (unconf) { |
2823 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || | |
363168b4 | 2824 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b | 2825 | status = nfserr_clid_inuse; |
81f0b2a4 | 2826 | goto out_free_conn; |
ec6b5d7b | 2827 | } |
57266a6e | 2828 | status = nfserr_wrong_cred; |
dedeb13f | 2829 | if (!nfsd4_mach_creds_match(unconf, rqstp)) |
57266a6e | 2830 | goto out_free_conn; |
49557cc7 AA |
2831 | cs_slot = &unconf->cl_cs_slot; |
2832 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
2833 | if (status) { |
2834 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 2835 | status = nfserr_seq_misordered; |
81f0b2a4 | 2836 | goto out_free_conn; |
ec6b5d7b | 2837 | } |
382a62e7 | 2838 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
221a6876 | 2839 | if (old) { |
d20c11d8 | 2840 | status = mark_client_expired_locked(old); |
7abea1e8 JL |
2841 | if (status) { |
2842 | old = NULL; | |
221a6876 | 2843 | goto out_free_conn; |
7abea1e8 | 2844 | } |
221a6876 | 2845 | } |
8f9d3d3b | 2846 | move_to_confirmed(unconf); |
ec6b5d7b AA |
2847 | conf = unconf; |
2848 | } else { | |
2849 | status = nfserr_stale_clientid; | |
81f0b2a4 | 2850 | goto out_free_conn; |
ec6b5d7b | 2851 | } |
81f0b2a4 | 2852 | status = nfs_ok; |
4ce85c8c | 2853 | /* Persistent sessions are not supported */ |
408b79bc | 2854 | cr_ses->flags &= ~SESSION4_PERSIST; |
4ce85c8c | 2855 | /* Upshifting from TCP to RDMA is not supported */ |
408b79bc BF |
2856 | cr_ses->flags &= ~SESSION4_RDMA; |
2857 | ||
81f0b2a4 | 2858 | init_session(rqstp, new, conf, cr_ses); |
d20c11d8 | 2859 | nfsd4_get_session_locked(new); |
81f0b2a4 | 2860 | |
ac7c46f2 | 2861 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, |
ec6b5d7b | 2862 | NFS4_MAX_SESSIONID_LEN); |
86c3e16c | 2863 | cs_slot->sl_seqid++; |
49557cc7 | 2864 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 2865 | |
d20c11d8 | 2866 | /* cache solo and embedded create sessions under the client_lock */ |
49557cc7 | 2867 | nfsd4_cache_create_session(cr_ses, cs_slot, status); |
d20c11d8 JL |
2868 | spin_unlock(&nn->client_lock); |
2869 | /* init connection and backchannel */ | |
2870 | nfsd4_init_conn(rqstp, conn, new); | |
2871 | nfsd4_put_session(new); | |
d20c11d8 JL |
2872 | if (old) |
2873 | expire_client(old); | |
ec6b5d7b | 2874 | return status; |
81f0b2a4 | 2875 | out_free_conn: |
d20c11d8 | 2876 | spin_unlock(&nn->client_lock); |
81f0b2a4 | 2877 | free_conn(conn); |
d20c11d8 JL |
2878 | if (old) |
2879 | expire_client(old); | |
81f0b2a4 BF |
2880 | out_free_session: |
2881 | __free_session(new); | |
55c760cf BF |
2882 | out_release_drc_mem: |
2883 | nfsd4_put_drc_mem(&cr_ses->fore_channel); | |
1ca50792 | 2884 | return status; |
069b6ad4 AA |
2885 | } |
2886 | ||
1d1bc8f2 BF |
2887 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
2888 | { | |
2889 | switch (*dir) { | |
2890 | case NFS4_CDFC4_FORE: | |
2891 | case NFS4_CDFC4_BACK: | |
2892 | return nfs_ok; | |
2893 | case NFS4_CDFC4_FORE_OR_BOTH: | |
2894 | case NFS4_CDFC4_BACK_OR_BOTH: | |
2895 | *dir = NFS4_CDFC4_BOTH; | |
2896 | return nfs_ok; | |
2897 | }; | |
2898 | return nfserr_inval; | |
2899 | } | |
2900 | ||
eb69853d CH |
2901 | __be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, |
2902 | struct nfsd4_compound_state *cstate, | |
2903 | union nfsd4_op_u *u) | |
cb73a9f4 | 2904 | { |
eb69853d | 2905 | struct nfsd4_backchannel_ctl *bc = &u->backchannel_ctl; |
cb73a9f4 | 2906 | struct nfsd4_session *session = cstate->session; |
c9a49628 | 2907 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
b78724b7 | 2908 | __be32 status; |
cb73a9f4 | 2909 | |
b78724b7 BF |
2910 | status = nfsd4_check_cb_sec(&bc->bc_cb_sec); |
2911 | if (status) | |
2912 | return status; | |
c9a49628 | 2913 | spin_lock(&nn->client_lock); |
cb73a9f4 BF |
2914 | session->se_cb_prog = bc->bc_cb_program; |
2915 | session->se_cb_sec = bc->bc_cb_sec; | |
c9a49628 | 2916 | spin_unlock(&nn->client_lock); |
cb73a9f4 BF |
2917 | |
2918 | nfsd4_probe_callback(session->se_client); | |
2919 | ||
2920 | return nfs_ok; | |
2921 | } | |
2922 | ||
1d1bc8f2 BF |
2923 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, |
2924 | struct nfsd4_compound_state *cstate, | |
eb69853d | 2925 | union nfsd4_op_u *u) |
1d1bc8f2 | 2926 | { |
eb69853d | 2927 | struct nfsd4_bind_conn_to_session *bcts = &u->bind_conn_to_session; |
1d1bc8f2 | 2928 | __be32 status; |
3ba63671 | 2929 | struct nfsd4_conn *conn; |
4f6e6c17 | 2930 | struct nfsd4_session *session; |
d4e19e70 TM |
2931 | struct net *net = SVC_NET(rqstp); |
2932 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1d1bc8f2 BF |
2933 | |
2934 | if (!nfsd4_last_compound_op(rqstp)) | |
2935 | return nfserr_not_only_op; | |
c9a49628 | 2936 | spin_lock(&nn->client_lock); |
d4e19e70 | 2937 | session = find_in_sessionid_hashtbl(&bcts->sessionid, net, &status); |
c9a49628 | 2938 | spin_unlock(&nn->client_lock); |
4f6e6c17 | 2939 | if (!session) |
d4e19e70 | 2940 | goto out_no_session; |
57266a6e | 2941 | status = nfserr_wrong_cred; |
dedeb13f | 2942 | if (!nfsd4_mach_creds_match(session->se_client, rqstp)) |
57266a6e | 2943 | goto out; |
1d1bc8f2 | 2944 | status = nfsd4_map_bcts_dir(&bcts->dir); |
3ba63671 | 2945 | if (status) |
4f6e6c17 | 2946 | goto out; |
3ba63671 | 2947 | conn = alloc_conn(rqstp, bcts->dir); |
4f6e6c17 | 2948 | status = nfserr_jukebox; |
3ba63671 | 2949 | if (!conn) |
4f6e6c17 BF |
2950 | goto out; |
2951 | nfsd4_init_conn(rqstp, conn, session); | |
2952 | status = nfs_ok; | |
2953 | out: | |
d4e19e70 TM |
2954 | nfsd4_put_session(session); |
2955 | out_no_session: | |
4f6e6c17 | 2956 | return status; |
1d1bc8f2 BF |
2957 | } |
2958 | ||
5d4cec2f BF |
2959 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
2960 | { | |
2961 | if (!session) | |
51d87bc2 | 2962 | return false; |
5d4cec2f BF |
2963 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); |
2964 | } | |
2965 | ||
069b6ad4 | 2966 | __be32 |
eb69853d CH |
2967 | nfsd4_destroy_session(struct svc_rqst *r, struct nfsd4_compound_state *cstate, |
2968 | union nfsd4_op_u *u) | |
069b6ad4 | 2969 | { |
eb69853d | 2970 | struct nfsd4_destroy_session *sessionid = &u->destroy_session; |
e10e0cfc | 2971 | struct nfsd4_session *ses; |
abcdff09 | 2972 | __be32 status; |
f0f51f5c | 2973 | int ref_held_by_me = 0; |
d4e19e70 TM |
2974 | struct net *net = SVC_NET(r); |
2975 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
e10e0cfc | 2976 | |
abcdff09 | 2977 | status = nfserr_not_only_op; |
5d4cec2f | 2978 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 | 2979 | if (!nfsd4_last_compound_op(r)) |
abcdff09 | 2980 | goto out; |
f0f51f5c | 2981 | ref_held_by_me++; |
57716355 | 2982 | } |
e10e0cfc | 2983 | dump_sessionid(__func__, &sessionid->sessionid); |
c9a49628 | 2984 | spin_lock(&nn->client_lock); |
d4e19e70 | 2985 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid, net, &status); |
abcdff09 BF |
2986 | if (!ses) |
2987 | goto out_client_lock; | |
57266a6e | 2988 | status = nfserr_wrong_cred; |
dedeb13f | 2989 | if (!nfsd4_mach_creds_match(ses->se_client, r)) |
d4e19e70 | 2990 | goto out_put_session; |
f0f51f5c | 2991 | status = mark_session_dead_locked(ses, 1 + ref_held_by_me); |
66b2b9b2 | 2992 | if (status) |
f0f51f5c | 2993 | goto out_put_session; |
e10e0cfc | 2994 | unhash_session(ses); |
c9a49628 | 2995 | spin_unlock(&nn->client_lock); |
e10e0cfc | 2996 | |
84f5f7cc | 2997 | nfsd4_probe_callback_sync(ses->se_client); |
19cf5c02 | 2998 | |
c9a49628 | 2999 | spin_lock(&nn->client_lock); |
e10e0cfc | 3000 | status = nfs_ok; |
f0f51f5c | 3001 | out_put_session: |
d4e19e70 | 3002 | nfsd4_put_session_locked(ses); |
abcdff09 BF |
3003 | out_client_lock: |
3004 | spin_unlock(&nn->client_lock); | |
e10e0cfc | 3005 | out: |
e10e0cfc | 3006 | return status; |
069b6ad4 AA |
3007 | } |
3008 | ||
a663bdd8 | 3009 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
3010 | { |
3011 | struct nfsd4_conn *c; | |
3012 | ||
3013 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 3014 | if (c->cn_xprt == xpt) { |
328ead28 BF |
3015 | return c; |
3016 | } | |
3017 | } | |
3018 | return NULL; | |
3019 | } | |
3020 | ||
57266a6e | 3021 | static __be32 nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
3022 | { |
3023 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 3024 | struct nfsd4_conn *c; |
57266a6e | 3025 | __be32 status = nfs_ok; |
21b75b01 | 3026 | int ret; |
328ead28 BF |
3027 | |
3028 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 3029 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
57266a6e BF |
3030 | if (c) |
3031 | goto out_free; | |
3032 | status = nfserr_conn_not_bound_to_session; | |
3033 | if (clp->cl_mach_cred) | |
3034 | goto out_free; | |
328ead28 BF |
3035 | __nfsd4_hash_conn(new, ses); |
3036 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
3037 | ret = nfsd4_register_conn(new); |
3038 | if (ret) | |
3039 | /* oops; xprt is already down: */ | |
3040 | nfsd4_conn_lost(&new->cn_xpt_user); | |
57266a6e BF |
3041 | return nfs_ok; |
3042 | out_free: | |
3043 | spin_unlock(&clp->cl_lock); | |
3044 | free_conn(new); | |
3045 | return status; | |
328ead28 BF |
3046 | } |
3047 | ||
868b89c3 MJ |
3048 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
3049 | { | |
3050 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
3051 | ||
3052 | return args->opcnt > session->se_fchannel.maxops; | |
3053 | } | |
3054 | ||
ae82a8d0 MJ |
3055 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
3056 | struct nfsd4_session *session) | |
3057 | { | |
3058 | struct xdr_buf *xb = &rqstp->rq_arg; | |
3059 | ||
3060 | return xb->len > session->se_fchannel.maxreq_sz; | |
3061 | } | |
3062 | ||
53da6a53 BF |
3063 | static bool replay_matches_cache(struct svc_rqst *rqstp, |
3064 | struct nfsd4_sequence *seq, struct nfsd4_slot *slot) | |
3065 | { | |
3066 | struct nfsd4_compoundargs *argp = rqstp->rq_argp; | |
3067 | ||
3068 | if ((bool)(slot->sl_flags & NFSD4_SLOT_CACHETHIS) != | |
3069 | (bool)seq->cachethis) | |
3070 | return false; | |
3071 | /* | |
3072 | * If there's an error than the reply can have fewer ops than | |
3073 | * the call. But if we cached a reply with *more* ops than the | |
3074 | * call you're sending us now, then this new call is clearly not | |
3075 | * really a replay of the old one: | |
3076 | */ | |
3077 | if (slot->sl_opcnt < argp->opcnt) | |
3078 | return false; | |
3079 | /* This is the only check explicitly called by spec: */ | |
3080 | if (!same_creds(&rqstp->rq_cred, &slot->sl_cred)) | |
3081 | return false; | |
3082 | /* | |
3083 | * There may be more comparisons we could actually do, but the | |
3084 | * spec doesn't require us to catch every case where the calls | |
3085 | * don't match (that would require caching the call as well as | |
3086 | * the reply), so we don't bother. | |
3087 | */ | |
3088 | return true; | |
3089 | } | |
3090 | ||
069b6ad4 | 3091 | __be32 |
eb69853d CH |
3092 | nfsd4_sequence(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3093 | union nfsd4_op_u *u) | |
069b6ad4 | 3094 | { |
eb69853d | 3095 | struct nfsd4_sequence *seq = &u->sequence; |
f9bb94c4 | 3096 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
47ee5298 | 3097 | struct xdr_stream *xdr = &resp->xdr; |
b85d4c01 | 3098 | struct nfsd4_session *session; |
221a6876 | 3099 | struct nfs4_client *clp; |
b85d4c01 | 3100 | struct nfsd4_slot *slot; |
a663bdd8 | 3101 | struct nfsd4_conn *conn; |
57b7b43b | 3102 | __be32 status; |
47ee5298 | 3103 | int buflen; |
d4e19e70 TM |
3104 | struct net *net = SVC_NET(rqstp); |
3105 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
b85d4c01 | 3106 | |
f9bb94c4 AA |
3107 | if (resp->opcnt != 1) |
3108 | return nfserr_sequence_pos; | |
3109 | ||
a663bdd8 BF |
3110 | /* |
3111 | * Will be either used or freed by nfsd4_sequence_check_conn | |
3112 | * below. | |
3113 | */ | |
3114 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
3115 | if (!conn) | |
3116 | return nfserr_jukebox; | |
3117 | ||
c9a49628 | 3118 | spin_lock(&nn->client_lock); |
d4e19e70 | 3119 | session = find_in_sessionid_hashtbl(&seq->sessionid, net, &status); |
b85d4c01 | 3120 | if (!session) |
221a6876 BF |
3121 | goto out_no_session; |
3122 | clp = session->se_client; | |
b85d4c01 | 3123 | |
868b89c3 MJ |
3124 | status = nfserr_too_many_ops; |
3125 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
66b2b9b2 | 3126 | goto out_put_session; |
868b89c3 | 3127 | |
ae82a8d0 MJ |
3128 | status = nfserr_req_too_big; |
3129 | if (nfsd4_request_too_big(rqstp, session)) | |
66b2b9b2 | 3130 | goto out_put_session; |
ae82a8d0 | 3131 | |
b85d4c01 | 3132 | status = nfserr_badslot; |
6c18ba9f | 3133 | if (seq->slotid >= session->se_fchannel.maxreqs) |
66b2b9b2 | 3134 | goto out_put_session; |
b85d4c01 | 3135 | |
557ce264 | 3136 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
3137 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
3138 | ||
a8dfdaeb AA |
3139 | /* We do not negotiate the number of slots yet, so set the |
3140 | * maxslots to the session maxreqs which is used to encode | |
3141 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
3142 | seq->maxslots = session->se_fchannel.maxreqs; | |
3143 | ||
73e79482 BF |
3144 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, |
3145 | slot->sl_flags & NFSD4_SLOT_INUSE); | |
b85d4c01 | 3146 | if (status == nfserr_replay_cache) { |
bf5c43c8 BF |
3147 | status = nfserr_seq_misordered; |
3148 | if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) | |
66b2b9b2 | 3149 | goto out_put_session; |
53da6a53 BF |
3150 | status = nfserr_seq_false_retry; |
3151 | if (!replay_matches_cache(rqstp, seq, slot)) | |
3152 | goto out_put_session; | |
b85d4c01 BH |
3153 | cstate->slot = slot; |
3154 | cstate->session = session; | |
4b24ca7d | 3155 | cstate->clp = clp; |
da3846a2 | 3156 | /* Return the cached reply status and set cstate->status |
557ce264 | 3157 | * for nfsd4_proc_compound processing */ |
bf864a31 | 3158 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 3159 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 3160 | goto out; |
b85d4c01 BH |
3161 | } |
3162 | if (status) | |
66b2b9b2 | 3163 | goto out_put_session; |
b85d4c01 | 3164 | |
57266a6e | 3165 | status = nfsd4_sequence_check_conn(conn, session); |
a663bdd8 | 3166 | conn = NULL; |
57266a6e BF |
3167 | if (status) |
3168 | goto out_put_session; | |
328ead28 | 3169 | |
47ee5298 BF |
3170 | buflen = (seq->cachethis) ? |
3171 | session->se_fchannel.maxresp_cached : | |
3172 | session->se_fchannel.maxresp_sz; | |
3173 | status = (seq->cachethis) ? nfserr_rep_too_big_to_cache : | |
3174 | nfserr_rep_too_big; | |
a5cddc88 | 3175 | if (xdr_restrict_buflen(xdr, buflen - rqstp->rq_auth_slack)) |
47ee5298 | 3176 | goto out_put_session; |
32aaa62e | 3177 | svc_reserve(rqstp, buflen); |
47ee5298 BF |
3178 | |
3179 | status = nfs_ok; | |
b85d4c01 | 3180 | /* Success! bump slot seqid */ |
b85d4c01 | 3181 | slot->sl_seqid = seq->seqid; |
bf5c43c8 | 3182 | slot->sl_flags |= NFSD4_SLOT_INUSE; |
73e79482 BF |
3183 | if (seq->cachethis) |
3184 | slot->sl_flags |= NFSD4_SLOT_CACHETHIS; | |
bf5c43c8 BF |
3185 | else |
3186 | slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; | |
b85d4c01 BH |
3187 | |
3188 | cstate->slot = slot; | |
3189 | cstate->session = session; | |
4b24ca7d | 3190 | cstate->clp = clp; |
b85d4c01 | 3191 | |
b85d4c01 | 3192 | out: |
221a6876 BF |
3193 | switch (clp->cl_cb_state) { |
3194 | case NFSD4_CB_DOWN: | |
3195 | seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; | |
3196 | break; | |
3197 | case NFSD4_CB_FAULT: | |
3198 | seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; | |
3199 | break; | |
3200 | default: | |
3201 | seq->status_flags = 0; | |
aaf84eb9 | 3202 | } |
3bd64a5b BF |
3203 | if (!list_empty(&clp->cl_revoked)) |
3204 | seq->status_flags |= SEQ4_STATUS_RECALLABLE_STATE_REVOKED; | |
221a6876 | 3205 | out_no_session: |
3f42d2c4 KM |
3206 | if (conn) |
3207 | free_conn(conn); | |
c9a49628 | 3208 | spin_unlock(&nn->client_lock); |
b85d4c01 | 3209 | return status; |
66b2b9b2 | 3210 | out_put_session: |
d4e19e70 | 3211 | nfsd4_put_session_locked(session); |
221a6876 | 3212 | goto out_no_session; |
069b6ad4 AA |
3213 | } |
3214 | ||
b607664e TM |
3215 | void |
3216 | nfsd4_sequence_done(struct nfsd4_compoundres *resp) | |
3217 | { | |
3218 | struct nfsd4_compound_state *cs = &resp->cstate; | |
3219 | ||
3220 | if (nfsd4_has_session(cs)) { | |
b607664e TM |
3221 | if (cs->status != nfserr_replay_cache) { |
3222 | nfsd4_store_cache_entry(resp); | |
3223 | cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE; | |
3224 | } | |
d4e19e70 | 3225 | /* Drop session reference that was taken in nfsd4_sequence() */ |
b607664e | 3226 | nfsd4_put_session(cs->session); |
4b24ca7d JL |
3227 | } else if (cs->clp) |
3228 | put_client_renew(cs->clp); | |
b607664e TM |
3229 | } |
3230 | ||
345c2842 | 3231 | __be32 |
eb69853d CH |
3232 | nfsd4_destroy_clientid(struct svc_rqst *rqstp, |
3233 | struct nfsd4_compound_state *cstate, | |
3234 | union nfsd4_op_u *u) | |
345c2842 | 3235 | { |
eb69853d | 3236 | struct nfsd4_destroy_clientid *dc = &u->destroy_clientid; |
6b10ad19 TM |
3237 | struct nfs4_client *conf, *unconf; |
3238 | struct nfs4_client *clp = NULL; | |
57b7b43b | 3239 | __be32 status = 0; |
8daae4dc | 3240 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
345c2842 | 3241 | |
6b10ad19 | 3242 | spin_lock(&nn->client_lock); |
0a7ec377 | 3243 | unconf = find_unconfirmed_client(&dc->clientid, true, nn); |
8daae4dc | 3244 | conf = find_confirmed_client(&dc->clientid, true, nn); |
78389046 | 3245 | WARN_ON_ONCE(conf && unconf); |
345c2842 MJ |
3246 | |
3247 | if (conf) { | |
c0293b01 | 3248 | if (client_has_state(conf)) { |
345c2842 MJ |
3249 | status = nfserr_clientid_busy; |
3250 | goto out; | |
3251 | } | |
fd699b8a JL |
3252 | status = mark_client_expired_locked(conf); |
3253 | if (status) | |
3254 | goto out; | |
6b10ad19 | 3255 | clp = conf; |
345c2842 MJ |
3256 | } else if (unconf) |
3257 | clp = unconf; | |
3258 | else { | |
3259 | status = nfserr_stale_clientid; | |
3260 | goto out; | |
3261 | } | |
dedeb13f | 3262 | if (!nfsd4_mach_creds_match(clp, rqstp)) { |
6b10ad19 | 3263 | clp = NULL; |
57266a6e BF |
3264 | status = nfserr_wrong_cred; |
3265 | goto out; | |
3266 | } | |
6b10ad19 | 3267 | unhash_client_locked(clp); |
345c2842 | 3268 | out: |
6b10ad19 | 3269 | spin_unlock(&nn->client_lock); |
6b10ad19 TM |
3270 | if (clp) |
3271 | expire_client(clp); | |
345c2842 MJ |
3272 | return status; |
3273 | } | |
3274 | ||
4dc6ec00 | 3275 | __be32 |
eb69853d CH |
3276 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, |
3277 | struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) | |
4dc6ec00 | 3278 | { |
eb69853d | 3279 | struct nfsd4_reclaim_complete *rc = &u->reclaim_complete; |
57b7b43b | 3280 | __be32 status = 0; |
bcecf1cc | 3281 | |
4dc6ec00 BF |
3282 | if (rc->rca_one_fs) { |
3283 | if (!cstate->current_fh.fh_dentry) | |
3284 | return nfserr_nofilehandle; | |
3285 | /* | |
3286 | * We don't take advantage of the rca_one_fs case. | |
3287 | * That's OK, it's optional, we can safely ignore it. | |
3288 | */ | |
d28c442f | 3289 | return nfs_ok; |
4dc6ec00 | 3290 | } |
bcecf1cc | 3291 | |
bcecf1cc | 3292 | status = nfserr_complete_already; |
a52d726b JL |
3293 | if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, |
3294 | &cstate->session->se_client->cl_flags)) | |
bcecf1cc MJ |
3295 | goto out; |
3296 | ||
3297 | status = nfserr_stale_clientid; | |
3298 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
3299 | /* |
3300 | * The following error isn't really legal. | |
3301 | * But we only get here if the client just explicitly | |
3302 | * destroyed the client. Surely it no longer cares what | |
3303 | * error it gets back on an operation for the dead | |
3304 | * client. | |
3305 | */ | |
bcecf1cc MJ |
3306 | goto out; |
3307 | ||
3308 | status = nfs_ok; | |
2a4317c5 | 3309 | nfsd4_client_record_create(cstate->session->se_client); |
bcecf1cc | 3310 | out: |
bcecf1cc | 3311 | return status; |
4dc6ec00 BF |
3312 | } |
3313 | ||
b37ad28b | 3314 | __be32 |
b591480b | 3315 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 3316 | union nfsd4_op_u *u) |
1da177e4 | 3317 | { |
eb69853d | 3318 | struct nfsd4_setclientid *setclid = &u->setclientid; |
a084daf5 | 3319 | struct xdr_netobj clname = setclid->se_name; |
1da177e4 | 3320 | nfs4_verifier clverifier = setclid->se_verf; |
3dbacee6 TM |
3321 | struct nfs4_client *conf, *new; |
3322 | struct nfs4_client *unconf = NULL; | |
b37ad28b | 3323 | __be32 status; |
c212cecf SK |
3324 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
3325 | ||
5cc40fd7 TM |
3326 | new = create_client(clname, rqstp, &clverifier); |
3327 | if (new == NULL) | |
3328 | return nfserr_jukebox; | |
63db4632 | 3329 | /* Cases below refer to rfc 3530 section 14.2.33: */ |
3dbacee6 | 3330 | spin_lock(&nn->client_lock); |
382a62e7 | 3331 | conf = find_confirmed_client_by_name(&clname, nn); |
2b634821 | 3332 | if (conf && client_has_state(conf)) { |
63db4632 | 3333 | /* case 0: */ |
1da177e4 | 3334 | status = nfserr_clid_inuse; |
e203d506 BF |
3335 | if (clp_used_exchangeid(conf)) |
3336 | goto out; | |
026722c2 | 3337 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
3338 | char addr_str[INET6_ADDRSTRLEN]; |
3339 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
3340 | sizeof(addr_str)); | |
3341 | dprintk("NFSD: setclientid: string in use by client " | |
3342 | "at %s\n", addr_str); | |
1da177e4 LT |
3343 | goto out; |
3344 | } | |
1da177e4 | 3345 | } |
a99454aa | 3346 | unconf = find_unconfirmed_client_by_name(&clname, nn); |
8f930711 | 3347 | if (unconf) |
3dbacee6 | 3348 | unhash_client_locked(unconf); |
41eb1670 | 3349 | if (conf && same_verf(&conf->cl_verifier, &clverifier)) { |
63db4632 | 3350 | /* case 1: probable callback update */ |
1da177e4 | 3351 | copy_clid(new, conf); |
41eb1670 KM |
3352 | gen_confirm(new, nn); |
3353 | } else /* case 4 (new client) or cases 2, 3 (client reboot): */ | |
c212cecf | 3354 | gen_clid(new, nn); |
8323c3b2 | 3355 | new->cl_minorversion = 0; |
6f3d772f | 3356 | gen_callback(new, setclid, rqstp); |
ac55fdc4 | 3357 | add_to_unconfirmed(new); |
1da177e4 LT |
3358 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
3359 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
3360 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
5cc40fd7 | 3361 | new = NULL; |
1da177e4 LT |
3362 | status = nfs_ok; |
3363 | out: | |
3dbacee6 | 3364 | spin_unlock(&nn->client_lock); |
5cc40fd7 TM |
3365 | if (new) |
3366 | free_client(new); | |
3dbacee6 TM |
3367 | if (unconf) |
3368 | expire_client(unconf); | |
1da177e4 LT |
3369 | return status; |
3370 | } | |
3371 | ||
3372 | ||
b37ad28b | 3373 | __be32 |
b591480b | 3374 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
eb69853d CH |
3375 | struct nfsd4_compound_state *cstate, |
3376 | union nfsd4_op_u *u) | |
1da177e4 | 3377 | { |
eb69853d CH |
3378 | struct nfsd4_setclientid_confirm *setclientid_confirm = |
3379 | &u->setclientid_confirm; | |
21ab45a4 | 3380 | struct nfs4_client *conf, *unconf; |
d20c11d8 | 3381 | struct nfs4_client *old = NULL; |
1da177e4 LT |
3382 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
3383 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 3384 | __be32 status; |
7f2210fa | 3385 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 3386 | |
2c142baa | 3387 | if (STALE_CLIENTID(clid, nn)) |
1da177e4 | 3388 | return nfserr_stale_clientid; |
21ab45a4 | 3389 | |
d20c11d8 | 3390 | spin_lock(&nn->client_lock); |
8daae4dc | 3391 | conf = find_confirmed_client(clid, false, nn); |
0a7ec377 | 3392 | unconf = find_unconfirmed_client(clid, false, nn); |
a186e767 | 3393 | /* |
8695b90a BF |
3394 | * We try hard to give out unique clientid's, so if we get an |
3395 | * attempt to confirm the same clientid with a different cred, | |
f984a7ce BF |
3396 | * the client may be buggy; this should never happen. |
3397 | * | |
3398 | * Nevertheless, RFC 7530 recommends INUSE for this case: | |
a186e767 | 3399 | */ |
f984a7ce | 3400 | status = nfserr_clid_inuse; |
8695b90a BF |
3401 | if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) |
3402 | goto out; | |
3403 | if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) | |
3404 | goto out; | |
63db4632 | 3405 | /* cases below refer to rfc 3530 section 14.2.34: */ |
90d700b7 | 3406 | if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) { |
7d22fc11 BF |
3407 | if (conf && same_verf(&confirm, &conf->cl_confirm)) { |
3408 | /* case 2: probable retransmit */ | |
1da177e4 | 3409 | status = nfs_ok; |
7d22fc11 | 3410 | } else /* case 4: client hasn't noticed we rebooted yet? */ |
90d700b7 BF |
3411 | status = nfserr_stale_clientid; |
3412 | goto out; | |
3413 | } | |
3414 | status = nfs_ok; | |
3415 | if (conf) { /* case 1: callback update */ | |
d20c11d8 JL |
3416 | old = unconf; |
3417 | unhash_client_locked(old); | |
8695b90a | 3418 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
90d700b7 | 3419 | } else { /* case 3: normal case; new or rebooted client */ |
d20c11d8 JL |
3420 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
3421 | if (old) { | |
2b634821 BF |
3422 | status = nfserr_clid_inuse; |
3423 | if (client_has_state(old) | |
3424 | && !same_creds(&unconf->cl_cred, | |
3425 | &old->cl_cred)) | |
3426 | goto out; | |
d20c11d8 | 3427 | status = mark_client_expired_locked(old); |
7abea1e8 JL |
3428 | if (status) { |
3429 | old = NULL; | |
221a6876 | 3430 | goto out; |
7abea1e8 | 3431 | } |
221a6876 | 3432 | } |
8695b90a | 3433 | move_to_confirmed(unconf); |
d20c11d8 | 3434 | conf = unconf; |
08e8987c | 3435 | } |
d20c11d8 JL |
3436 | get_client_locked(conf); |
3437 | spin_unlock(&nn->client_lock); | |
3438 | nfsd4_probe_callback(conf); | |
3439 | spin_lock(&nn->client_lock); | |
3440 | put_client_renew_locked(conf); | |
1da177e4 | 3441 | out: |
d20c11d8 JL |
3442 | spin_unlock(&nn->client_lock); |
3443 | if (old) | |
3444 | expire_client(old); | |
1da177e4 LT |
3445 | return status; |
3446 | } | |
3447 | ||
32513b40 BF |
3448 | static struct nfs4_file *nfsd4_alloc_file(void) |
3449 | { | |
3450 | return kmem_cache_alloc(file_slab, GFP_KERNEL); | |
3451 | } | |
3452 | ||
1da177e4 | 3453 | /* OPEN Share state helper functions */ |
5b095e99 JL |
3454 | static void nfsd4_init_file(struct knfsd_fh *fh, unsigned int hashval, |
3455 | struct nfs4_file *fp) | |
1da177e4 | 3456 | { |
950e0118 TM |
3457 | lockdep_assert_held(&state_lock); |
3458 | ||
818a34eb | 3459 | refcount_set(&fp->fi_ref, 1); |
1d31a253 | 3460 | spin_lock_init(&fp->fi_lock); |
32513b40 BF |
3461 | INIT_LIST_HEAD(&fp->fi_stateids); |
3462 | INIT_LIST_HEAD(&fp->fi_delegations); | |
8287f009 | 3463 | INIT_LIST_HEAD(&fp->fi_clnt_odstate); |
e2cf80d7 | 3464 | fh_copy_shallow(&fp->fi_fhandle, fh); |
0c637be8 | 3465 | fp->fi_deleg_file = NULL; |
32513b40 | 3466 | fp->fi_had_conflict = false; |
baeb4ff0 | 3467 | fp->fi_share_deny = 0; |
32513b40 BF |
3468 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); |
3469 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
9cf514cc CH |
3470 | #ifdef CONFIG_NFSD_PNFS |
3471 | INIT_LIST_HEAD(&fp->fi_lo_states); | |
c5c707f9 | 3472 | atomic_set(&fp->fi_lo_recalls, 0); |
9cf514cc | 3473 | #endif |
5b095e99 | 3474 | hlist_add_head_rcu(&fp->fi_hash, &file_hashtbl[hashval]); |
1da177e4 LT |
3475 | } |
3476 | ||
e8ff2a84 | 3477 | void |
1da177e4 LT |
3478 | nfsd4_free_slabs(void) |
3479 | { | |
9258a2d5 | 3480 | kmem_cache_destroy(client_slab); |
abf1135b CH |
3481 | kmem_cache_destroy(openowner_slab); |
3482 | kmem_cache_destroy(lockowner_slab); | |
3483 | kmem_cache_destroy(file_slab); | |
3484 | kmem_cache_destroy(stateid_slab); | |
3485 | kmem_cache_destroy(deleg_slab); | |
9258a2d5 | 3486 | kmem_cache_destroy(odstate_slab); |
e60d4398 | 3487 | } |
1da177e4 | 3488 | |
72083396 | 3489 | int |
e60d4398 N |
3490 | nfsd4_init_slabs(void) |
3491 | { | |
9258a2d5 JL |
3492 | client_slab = kmem_cache_create("nfsd4_clients", |
3493 | sizeof(struct nfs4_client), 0, 0, NULL); | |
3494 | if (client_slab == NULL) | |
3495 | goto out; | |
fe0750e5 BF |
3496 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
3497 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
3498 | if (openowner_slab == NULL) | |
9258a2d5 | 3499 | goto out_free_client_slab; |
fe0750e5 | 3500 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", |
3c40794b | 3501 | sizeof(struct nfs4_lockowner), 0, 0, NULL); |
fe0750e5 | 3502 | if (lockowner_slab == NULL) |
abf1135b | 3503 | goto out_free_openowner_slab; |
e60d4398 | 3504 | file_slab = kmem_cache_create("nfsd4_files", |
20c2df83 | 3505 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 | 3506 | if (file_slab == NULL) |
abf1135b | 3507 | goto out_free_lockowner_slab; |
5ac049ac | 3508 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
dcef0413 | 3509 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
5ac049ac | 3510 | if (stateid_slab == NULL) |
abf1135b | 3511 | goto out_free_file_slab; |
5b2d21c1 | 3512 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 3513 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 | 3514 | if (deleg_slab == NULL) |
abf1135b | 3515 | goto out_free_stateid_slab; |
8287f009 SB |
3516 | odstate_slab = kmem_cache_create("nfsd4_odstate", |
3517 | sizeof(struct nfs4_clnt_odstate), 0, 0, NULL); | |
3518 | if (odstate_slab == NULL) | |
3519 | goto out_free_deleg_slab; | |
e60d4398 | 3520 | return 0; |
abf1135b | 3521 | |
8287f009 SB |
3522 | out_free_deleg_slab: |
3523 | kmem_cache_destroy(deleg_slab); | |
abf1135b CH |
3524 | out_free_stateid_slab: |
3525 | kmem_cache_destroy(stateid_slab); | |
3526 | out_free_file_slab: | |
3527 | kmem_cache_destroy(file_slab); | |
3528 | out_free_lockowner_slab: | |
3529 | kmem_cache_destroy(lockowner_slab); | |
3530 | out_free_openowner_slab: | |
3531 | kmem_cache_destroy(openowner_slab); | |
9258a2d5 JL |
3532 | out_free_client_slab: |
3533 | kmem_cache_destroy(client_slab); | |
abf1135b | 3534 | out: |
e60d4398 N |
3535 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); |
3536 | return -ENOMEM; | |
1da177e4 LT |
3537 | } |
3538 | ||
ff194bd9 | 3539 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 3540 | { |
ff194bd9 BF |
3541 | rp->rp_status = nfserr_serverfault; |
3542 | rp->rp_buflen = 0; | |
3543 | rp->rp_buf = rp->rp_ibuf; | |
58fb12e6 JL |
3544 | mutex_init(&rp->rp_mutex); |
3545 | } | |
3546 | ||
3547 | static void nfsd4_cstate_assign_replay(struct nfsd4_compound_state *cstate, | |
3548 | struct nfs4_stateowner *so) | |
3549 | { | |
3550 | if (!nfsd4_has_session(cstate)) { | |
3551 | mutex_lock(&so->so_replay.rp_mutex); | |
b5971afa | 3552 | cstate->replay_owner = nfs4_get_stateowner(so); |
58fb12e6 JL |
3553 | } |
3554 | } | |
3555 | ||
3556 | void nfsd4_cstate_clear_replay(struct nfsd4_compound_state *cstate) | |
3557 | { | |
3558 | struct nfs4_stateowner *so = cstate->replay_owner; | |
3559 | ||
3560 | if (so != NULL) { | |
3561 | cstate->replay_owner = NULL; | |
3562 | mutex_unlock(&so->so_replay.rp_mutex); | |
3563 | nfs4_put_stateowner(so); | |
3564 | } | |
1da177e4 LT |
3565 | } |
3566 | ||
fe0750e5 | 3567 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 3568 | { |
1da177e4 | 3569 | struct nfs4_stateowner *sop; |
1da177e4 | 3570 | |
fe0750e5 | 3571 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
3572 | if (!sop) |
3573 | return NULL; | |
3574 | ||
3575 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); | |
3576 | if (!sop->so_owner.data) { | |
fe0750e5 | 3577 | kmem_cache_free(slab, sop); |
1da177e4 | 3578 | return NULL; |
ff194bd9 BF |
3579 | } |
3580 | sop->so_owner.len = owner->len; | |
3581 | ||
ea1da636 | 3582 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 BF |
3583 | sop->so_client = clp; |
3584 | init_nfs4_replay(&sop->so_replay); | |
6b180f0b | 3585 | atomic_set(&sop->so_count, 1); |
ff194bd9 BF |
3586 | return sop; |
3587 | } | |
3588 | ||
fe0750e5 | 3589 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 | 3590 | { |
d4f0489f | 3591 | lockdep_assert_held(&clp->cl_lock); |
9b531137 | 3592 | |
d4f0489f TM |
3593 | list_add(&oo->oo_owner.so_strhash, |
3594 | &clp->cl_ownerstr_hashtbl[strhashval]); | |
fe0750e5 | 3595 | list_add(&oo->oo_perclient, &clp->cl_openowners); |
ff194bd9 BF |
3596 | } |
3597 | ||
8f4b54c5 JL |
3598 | static void nfs4_unhash_openowner(struct nfs4_stateowner *so) |
3599 | { | |
d4f0489f | 3600 | unhash_openowner_locked(openowner(so)); |
8f4b54c5 JL |
3601 | } |
3602 | ||
6b180f0b JL |
3603 | static void nfs4_free_openowner(struct nfs4_stateowner *so) |
3604 | { | |
3605 | struct nfs4_openowner *oo = openowner(so); | |
3606 | ||
3607 | kmem_cache_free(openowner_slab, oo); | |
3608 | } | |
3609 | ||
3610 | static const struct nfs4_stateowner_operations openowner_ops = { | |
8f4b54c5 JL |
3611 | .so_unhash = nfs4_unhash_openowner, |
3612 | .so_free = nfs4_free_openowner, | |
6b180f0b JL |
3613 | }; |
3614 | ||
7fc0564e AE |
3615 | static struct nfs4_ol_stateid * |
3616 | nfsd4_find_existing_open(struct nfs4_file *fp, struct nfsd4_open *open) | |
3617 | { | |
3618 | struct nfs4_ol_stateid *local, *ret = NULL; | |
3619 | struct nfs4_openowner *oo = open->op_openowner; | |
3620 | ||
3621 | lockdep_assert_held(&fp->fi_lock); | |
3622 | ||
3623 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { | |
3624 | /* ignore lock owners */ | |
3625 | if (local->st_stateowner->so_is_open_owner == 0) | |
3626 | continue; | |
15ca08d3 TM |
3627 | if (local->st_stateowner != &oo->oo_owner) |
3628 | continue; | |
3629 | if (local->st_stid.sc_type == NFS4_OPEN_STID) { | |
7fc0564e | 3630 | ret = local; |
a15dfcd5 | 3631 | refcount_inc(&ret->st_stid.sc_count); |
7fc0564e AE |
3632 | break; |
3633 | } | |
3634 | } | |
3635 | return ret; | |
3636 | } | |
3637 | ||
15ca08d3 TM |
3638 | static __be32 |
3639 | nfsd4_verify_open_stid(struct nfs4_stid *s) | |
3640 | { | |
3641 | __be32 ret = nfs_ok; | |
3642 | ||
3643 | switch (s->sc_type) { | |
3644 | default: | |
3645 | break; | |
4f176417 | 3646 | case 0: |
15ca08d3 TM |
3647 | case NFS4_CLOSED_STID: |
3648 | case NFS4_CLOSED_DELEG_STID: | |
3649 | ret = nfserr_bad_stateid; | |
3650 | break; | |
3651 | case NFS4_REVOKED_DELEG_STID: | |
3652 | ret = nfserr_deleg_revoked; | |
3653 | } | |
3654 | return ret; | |
3655 | } | |
3656 | ||
3657 | /* Lock the stateid st_mutex, and deal with races with CLOSE */ | |
3658 | static __be32 | |
3659 | nfsd4_lock_ol_stateid(struct nfs4_ol_stateid *stp) | |
3660 | { | |
3661 | __be32 ret; | |
3662 | ||
4f34bd05 | 3663 | mutex_lock_nested(&stp->st_mutex, LOCK_STATEID_MUTEX); |
15ca08d3 TM |
3664 | ret = nfsd4_verify_open_stid(&stp->st_stid); |
3665 | if (ret != nfs_ok) | |
3666 | mutex_unlock(&stp->st_mutex); | |
3667 | return ret; | |
3668 | } | |
3669 | ||
3670 | static struct nfs4_ol_stateid * | |
3671 | nfsd4_find_and_lock_existing_open(struct nfs4_file *fp, struct nfsd4_open *open) | |
3672 | { | |
3673 | struct nfs4_ol_stateid *stp; | |
3674 | for (;;) { | |
3675 | spin_lock(&fp->fi_lock); | |
3676 | stp = nfsd4_find_existing_open(fp, open); | |
3677 | spin_unlock(&fp->fi_lock); | |
3678 | if (!stp || nfsd4_lock_ol_stateid(stp) == nfs_ok) | |
3679 | break; | |
3680 | nfs4_put_stid(&stp->st_stid); | |
3681 | } | |
3682 | return stp; | |
3683 | } | |
3684 | ||
fe0750e5 | 3685 | static struct nfs4_openowner * |
13d6f66b | 3686 | alloc_init_open_stateowner(unsigned int strhashval, struct nfsd4_open *open, |
db24b3b4 JL |
3687 | struct nfsd4_compound_state *cstate) |
3688 | { | |
13d6f66b | 3689 | struct nfs4_client *clp = cstate->clp; |
7ffb5880 | 3690 | struct nfs4_openowner *oo, *ret; |
ff194bd9 | 3691 | |
fe0750e5 BF |
3692 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
3693 | if (!oo) | |
ff194bd9 | 3694 | return NULL; |
6b180f0b | 3695 | oo->oo_owner.so_ops = &openowner_ops; |
fe0750e5 BF |
3696 | oo->oo_owner.so_is_open_owner = 1; |
3697 | oo->oo_owner.so_seqid = open->op_seqid; | |
d3134b10 | 3698 | oo->oo_flags = 0; |
db24b3b4 JL |
3699 | if (nfsd4_has_session(cstate)) |
3700 | oo->oo_flags |= NFS4_OO_CONFIRMED; | |
fe0750e5 | 3701 | oo->oo_time = 0; |
38c387b5 | 3702 | oo->oo_last_closed_stid = NULL; |
fe0750e5 | 3703 | INIT_LIST_HEAD(&oo->oo_close_lru); |
d4f0489f TM |
3704 | spin_lock(&clp->cl_lock); |
3705 | ret = find_openstateowner_str_locked(strhashval, open, clp); | |
7ffb5880 TM |
3706 | if (ret == NULL) { |
3707 | hash_openowner(oo, clp, strhashval); | |
3708 | ret = oo; | |
3709 | } else | |
d50ffded KM |
3710 | nfs4_free_stateowner(&oo->oo_owner); |
3711 | ||
d4f0489f | 3712 | spin_unlock(&clp->cl_lock); |
c5952338 | 3713 | return ret; |
1da177e4 LT |
3714 | } |
3715 | ||
7fc0564e | 3716 | static struct nfs4_ol_stateid * |
8c7245ab | 3717 | init_open_stateid(struct nfs4_file *fp, struct nfsd4_open *open) |
7fc0564e AE |
3718 | { |
3719 | ||
fe0750e5 | 3720 | struct nfs4_openowner *oo = open->op_openowner; |
7fc0564e | 3721 | struct nfs4_ol_stateid *retstp = NULL; |
8c7245ab | 3722 | struct nfs4_ol_stateid *stp; |
1da177e4 | 3723 | |
8c7245ab | 3724 | stp = open->op_stp; |
5cc1fb2a OD |
3725 | /* We are moving these outside of the spinlocks to avoid the warnings */ |
3726 | mutex_init(&stp->st_mutex); | |
4f34bd05 | 3727 | mutex_lock_nested(&stp->st_mutex, OPEN_STATEID_MUTEX); |
5cc1fb2a | 3728 | |
15ca08d3 | 3729 | retry: |
7fc0564e AE |
3730 | spin_lock(&oo->oo_owner.so_client->cl_lock); |
3731 | spin_lock(&fp->fi_lock); | |
3732 | ||
3733 | retstp = nfsd4_find_existing_open(fp, open); | |
3734 | if (retstp) | |
3735 | goto out_unlock; | |
8c7245ab OD |
3736 | |
3737 | open->op_stp = NULL; | |
a15dfcd5 | 3738 | refcount_inc(&stp->st_stid.sc_count); |
3abdb607 | 3739 | stp->st_stid.sc_type = NFS4_OPEN_STID; |
3c87b9b7 | 3740 | INIT_LIST_HEAD(&stp->st_locks); |
b5971afa | 3741 | stp->st_stateowner = nfs4_get_stateowner(&oo->oo_owner); |
13cd2184 | 3742 | get_nfs4_file(fp); |
11b9164a | 3743 | stp->st_stid.sc_file = fp; |
1da177e4 LT |
3744 | stp->st_access_bmap = 0; |
3745 | stp->st_deny_bmap = 0; | |
4c4cd222 | 3746 | stp->st_openstp = NULL; |
1c755dc1 | 3747 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); |
1d31a253 | 3748 | list_add(&stp->st_perfile, &fp->fi_stateids); |
7fc0564e AE |
3749 | |
3750 | out_unlock: | |
1d31a253 | 3751 | spin_unlock(&fp->fi_lock); |
1c755dc1 | 3752 | spin_unlock(&oo->oo_owner.so_client->cl_lock); |
5cc1fb2a | 3753 | if (retstp) { |
15ca08d3 TM |
3754 | /* Handle races with CLOSE */ |
3755 | if (nfsd4_lock_ol_stateid(retstp) != nfs_ok) { | |
3756 | nfs4_put_stid(&retstp->st_stid); | |
3757 | goto retry; | |
3758 | } | |
8c7245ab | 3759 | /* To keep mutex tracking happy */ |
5cc1fb2a | 3760 | mutex_unlock(&stp->st_mutex); |
8c7245ab | 3761 | stp = retstp; |
5cc1fb2a | 3762 | } |
8c7245ab | 3763 | return stp; |
1da177e4 LT |
3764 | } |
3765 | ||
d3134b10 JL |
3766 | /* |
3767 | * In the 4.0 case we need to keep the owners around a little while to handle | |
3768 | * CLOSE replay. We still do need to release any file access that is held by | |
3769 | * them before returning however. | |
3770 | */ | |
fd39ca9a | 3771 | static void |
d3134b10 | 3772 | move_to_close_lru(struct nfs4_ol_stateid *s, struct net *net) |
1da177e4 | 3773 | { |
217526e7 | 3774 | struct nfs4_ol_stateid *last; |
d3134b10 JL |
3775 | struct nfs4_openowner *oo = openowner(s->st_stateowner); |
3776 | struct nfsd_net *nn = net_generic(s->st_stid.sc_client->net, | |
3777 | nfsd_net_id); | |
73758fed | 3778 | |
fe0750e5 | 3779 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 3780 | |
b401be22 JL |
3781 | /* |
3782 | * We know that we hold one reference via nfsd4_close, and another | |
3783 | * "persistent" reference for the client. If the refcount is higher | |
3784 | * than 2, then there are still calls in progress that are using this | |
3785 | * stateid. We can't put the sc_file reference until they are finished. | |
3786 | * Wait for the refcount to drop to 2. Since it has been unhashed, | |
3787 | * there should be no danger of the refcount going back up again at | |
3788 | * this point. | |
3789 | */ | |
a15dfcd5 | 3790 | wait_event(close_wq, refcount_read(&s->st_stid.sc_count) == 2); |
b401be22 | 3791 | |
d3134b10 JL |
3792 | release_all_access(s); |
3793 | if (s->st_stid.sc_file) { | |
3794 | put_nfs4_file(s->st_stid.sc_file); | |
3795 | s->st_stid.sc_file = NULL; | |
3796 | } | |
217526e7 JL |
3797 | |
3798 | spin_lock(&nn->client_lock); | |
3799 | last = oo->oo_last_closed_stid; | |
d3134b10 | 3800 | oo->oo_last_closed_stid = s; |
73758fed | 3801 | list_move_tail(&oo->oo_close_lru, &nn->close_lru); |
fe0750e5 | 3802 | oo->oo_time = get_seconds(); |
217526e7 JL |
3803 | spin_unlock(&nn->client_lock); |
3804 | if (last) | |
3805 | nfs4_put_stid(&last->st_stid); | |
1da177e4 LT |
3806 | } |
3807 | ||
1da177e4 LT |
3808 | /* search file_hashtbl[] for file */ |
3809 | static struct nfs4_file * | |
5b095e99 | 3810 | find_file_locked(struct knfsd_fh *fh, unsigned int hashval) |
1da177e4 | 3811 | { |
1da177e4 LT |
3812 | struct nfs4_file *fp; |
3813 | ||
5b095e99 | 3814 | hlist_for_each_entry_rcu(fp, &file_hashtbl[hashval], fi_hash) { |
4d94c2ef | 3815 | if (fh_match(&fp->fi_fhandle, fh)) { |
818a34eb | 3816 | if (refcount_inc_not_zero(&fp->fi_ref)) |
5b095e99 | 3817 | return fp; |
13cd2184 | 3818 | } |
1da177e4 LT |
3819 | } |
3820 | return NULL; | |
3821 | } | |
3822 | ||
e6ba76e1 | 3823 | struct nfs4_file * |
ca943217 | 3824 | find_file(struct knfsd_fh *fh) |
950e0118 TM |
3825 | { |
3826 | struct nfs4_file *fp; | |
5b095e99 | 3827 | unsigned int hashval = file_hashval(fh); |
950e0118 | 3828 | |
5b095e99 JL |
3829 | rcu_read_lock(); |
3830 | fp = find_file_locked(fh, hashval); | |
3831 | rcu_read_unlock(); | |
950e0118 TM |
3832 | return fp; |
3833 | } | |
3834 | ||
3835 | static struct nfs4_file * | |
f9c00c3a | 3836 | find_or_add_file(struct nfs4_file *new, struct knfsd_fh *fh) |
950e0118 TM |
3837 | { |
3838 | struct nfs4_file *fp; | |
5b095e99 JL |
3839 | unsigned int hashval = file_hashval(fh); |
3840 | ||
3841 | rcu_read_lock(); | |
3842 | fp = find_file_locked(fh, hashval); | |
3843 | rcu_read_unlock(); | |
3844 | if (fp) | |
3845 | return fp; | |
950e0118 TM |
3846 | |
3847 | spin_lock(&state_lock); | |
5b095e99 JL |
3848 | fp = find_file_locked(fh, hashval); |
3849 | if (likely(fp == NULL)) { | |
3850 | nfsd4_init_file(fh, hashval, new); | |
950e0118 TM |
3851 | fp = new; |
3852 | } | |
3853 | spin_unlock(&state_lock); | |
3854 | ||
3855 | return fp; | |
3856 | } | |
3857 | ||
1da177e4 LT |
3858 | /* |
3859 | * Called to check deny when READ with all zero stateid or | |
3860 | * WRITE with all zero or all one stateid | |
3861 | */ | |
b37ad28b | 3862 | static __be32 |
1da177e4 LT |
3863 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
3864 | { | |
1da177e4 | 3865 | struct nfs4_file *fp; |
baeb4ff0 | 3866 | __be32 ret = nfs_ok; |
1da177e4 | 3867 | |
ca943217 | 3868 | fp = find_file(¤t_fh->fh_handle); |
13cd2184 | 3869 | if (!fp) |
baeb4ff0 JL |
3870 | return ret; |
3871 | /* Check for conflicting share reservations */ | |
1d31a253 | 3872 | spin_lock(&fp->fi_lock); |
baeb4ff0 JL |
3873 | if (fp->fi_share_deny & deny_type) |
3874 | ret = nfserr_locked; | |
1d31a253 | 3875 | spin_unlock(&fp->fi_lock); |
13cd2184 N |
3876 | put_nfs4_file(fp); |
3877 | return ret; | |
1da177e4 LT |
3878 | } |
3879 | ||
0162ac2b | 3880 | static void nfsd4_cb_recall_prepare(struct nfsd4_callback *cb) |
1da177e4 | 3881 | { |
0162ac2b | 3882 | struct nfs4_delegation *dp = cb_to_delegation(cb); |
11b9164a TM |
3883 | struct nfsd_net *nn = net_generic(dp->dl_stid.sc_client->net, |
3884 | nfsd_net_id); | |
e8c69d17 | 3885 | |
11b9164a | 3886 | block_delegations(&dp->dl_stid.sc_file->fi_fhandle); |
f54fe962 | 3887 | |
dff1399f | 3888 | /* |
f54fe962 JL |
3889 | * We can't do this in nfsd_break_deleg_cb because it is |
3890 | * already holding inode->i_lock. | |
3891 | * | |
dff1399f JL |
3892 | * If the dl_time != 0, then we know that it has already been |
3893 | * queued for a lease break. Don't queue it again. | |
3894 | */ | |
f54fe962 | 3895 | spin_lock(&state_lock); |
dff1399f | 3896 | if (dp->dl_time == 0) { |
dff1399f | 3897 | dp->dl_time = get_seconds(); |
02e1215f | 3898 | list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru); |
dff1399f | 3899 | } |
02e1215f JL |
3900 | spin_unlock(&state_lock); |
3901 | } | |
1da177e4 | 3902 | |
0162ac2b CH |
3903 | static int nfsd4_cb_recall_done(struct nfsd4_callback *cb, |
3904 | struct rpc_task *task) | |
3905 | { | |
3906 | struct nfs4_delegation *dp = cb_to_delegation(cb); | |
3907 | ||
a457974f AE |
3908 | if (dp->dl_stid.sc_type == NFS4_CLOSED_DELEG_STID) |
3909 | return 1; | |
3910 | ||
0162ac2b CH |
3911 | switch (task->tk_status) { |
3912 | case 0: | |
3913 | return 1; | |
3914 | case -EBADHANDLE: | |
3915 | case -NFS4ERR_BAD_STATEID: | |
3916 | /* | |
3917 | * Race: client probably got cb_recall before open reply | |
3918 | * granting delegation. | |
3919 | */ | |
3920 | if (dp->dl_retries--) { | |
3921 | rpc_delay(task, 2 * HZ); | |
3922 | return 0; | |
3923 | } | |
3924 | /*FALLTHRU*/ | |
3925 | default: | |
3926 | return -1; | |
3927 | } | |
3928 | } | |
3929 | ||
3930 | static void nfsd4_cb_recall_release(struct nfsd4_callback *cb) | |
3931 | { | |
3932 | struct nfs4_delegation *dp = cb_to_delegation(cb); | |
3933 | ||
3934 | nfs4_put_stid(&dp->dl_stid); | |
3935 | } | |
3936 | ||
c4cb8974 | 3937 | static const struct nfsd4_callback_ops nfsd4_cb_recall_ops = { |
0162ac2b CH |
3938 | .prepare = nfsd4_cb_recall_prepare, |
3939 | .done = nfsd4_cb_recall_done, | |
3940 | .release = nfsd4_cb_recall_release, | |
3941 | }; | |
3942 | ||
02e1215f JL |
3943 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
3944 | { | |
3945 | /* | |
3946 | * We're assuming the state code never drops its reference | |
3947 | * without first removing the lease. Since we're in this lease | |
3948 | * callback (and since the lease code is serialized by the kernel | |
3949 | * lock) we know the server hasn't removed the lease yet, we know | |
3950 | * it's safe to take a reference. | |
3951 | */ | |
a15dfcd5 | 3952 | refcount_inc(&dp->dl_stid.sc_count); |
f0b5de1b | 3953 | nfsd4_run_cb(&dp->dl_recall); |
6b57d9c8 BF |
3954 | } |
3955 | ||
1c8c601a | 3956 | /* Called from break_lease() with i_lock held. */ |
4d01b7f5 JL |
3957 | static bool |
3958 | nfsd_break_deleg_cb(struct file_lock *fl) | |
6b57d9c8 | 3959 | { |
4d01b7f5 | 3960 | bool ret = false; |
653e514e BF |
3961 | struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; |
3962 | struct nfs4_file *fp = dp->dl_stid.sc_file; | |
6b57d9c8 | 3963 | |
0272e1fd BF |
3964 | /* |
3965 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 3966 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 3967 | * in time: |
0272e1fd BF |
3968 | */ |
3969 | fl->fl_break_time = 0; | |
1da177e4 | 3970 | |
02e1215f | 3971 | spin_lock(&fp->fi_lock); |
417c6629 | 3972 | fp->fi_had_conflict = true; |
353601e7 | 3973 | nfsd_break_one_deleg(dp); |
02e1215f | 3974 | spin_unlock(&fp->fi_lock); |
4d01b7f5 | 3975 | return ret; |
1da177e4 LT |
3976 | } |
3977 | ||
c45198ed | 3978 | static int |
7448cc37 JL |
3979 | nfsd_change_deleg_cb(struct file_lock *onlist, int arg, |
3980 | struct list_head *dispose) | |
1da177e4 LT |
3981 | { |
3982 | if (arg & F_UNLCK) | |
c45198ed | 3983 | return lease_modify(onlist, arg, dispose); |
1da177e4 LT |
3984 | else |
3985 | return -EAGAIN; | |
3986 | } | |
3987 | ||
7b021967 | 3988 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
3989 | .lm_break = nfsd_break_deleg_cb, |
3990 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
3991 | }; |
3992 | ||
7a8711c9 BF |
3993 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
3994 | { | |
3995 | if (nfsd4_has_session(cstate)) | |
3996 | return nfs_ok; | |
3997 | if (seqid == so->so_seqid - 1) | |
3998 | return nfserr_replay_me; | |
3999 | if (seqid == so->so_seqid) | |
4000 | return nfs_ok; | |
4001 | return nfserr_bad_seqid; | |
4002 | } | |
1da177e4 | 4003 | |
4b24ca7d JL |
4004 | static __be32 lookup_clientid(clientid_t *clid, |
4005 | struct nfsd4_compound_state *cstate, | |
4006 | struct nfsd_net *nn) | |
4007 | { | |
4008 | struct nfs4_client *found; | |
4009 | ||
4010 | if (cstate->clp) { | |
4011 | found = cstate->clp; | |
4012 | if (!same_clid(&found->cl_clientid, clid)) | |
4013 | return nfserr_stale_clientid; | |
4014 | return nfs_ok; | |
4015 | } | |
4016 | ||
4017 | if (STALE_CLIENTID(clid, nn)) | |
4018 | return nfserr_stale_clientid; | |
4019 | ||
4020 | /* | |
4021 | * For v4.1+ we get the client in the SEQUENCE op. If we don't have one | |
4022 | * cached already then we know this is for is for v4.0 and "sessions" | |
4023 | * will be false. | |
4024 | */ | |
4025 | WARN_ON_ONCE(cstate->session); | |
3e339f96 | 4026 | spin_lock(&nn->client_lock); |
4b24ca7d | 4027 | found = find_confirmed_client(clid, false, nn); |
3e339f96 TM |
4028 | if (!found) { |
4029 | spin_unlock(&nn->client_lock); | |
4b24ca7d | 4030 | return nfserr_expired; |
3e339f96 TM |
4031 | } |
4032 | atomic_inc(&found->cl_refcount); | |
4033 | spin_unlock(&nn->client_lock); | |
4b24ca7d JL |
4034 | |
4035 | /* Cache the nfs4_client in cstate! */ | |
4036 | cstate->clp = found; | |
4b24ca7d JL |
4037 | return nfs_ok; |
4038 | } | |
4039 | ||
b37ad28b | 4040 | __be32 |
6668958f | 4041 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
3320fef1 | 4042 | struct nfsd4_open *open, struct nfsd_net *nn) |
1da177e4 | 4043 | { |
1da177e4 LT |
4044 | clientid_t *clientid = &open->op_clientid; |
4045 | struct nfs4_client *clp = NULL; | |
4046 | unsigned int strhashval; | |
fe0750e5 | 4047 | struct nfs4_openowner *oo = NULL; |
4cdc951b | 4048 | __be32 status; |
1da177e4 | 4049 | |
2c142baa | 4050 | if (STALE_CLIENTID(&open->op_clientid, nn)) |
1da177e4 | 4051 | return nfserr_stale_clientid; |
32513b40 BF |
4052 | /* |
4053 | * In case we need it later, after we've already created the | |
4054 | * file and don't want to risk a further failure: | |
4055 | */ | |
4056 | open->op_file = nfsd4_alloc_file(); | |
4057 | if (open->op_file == NULL) | |
4058 | return nfserr_jukebox; | |
1da177e4 | 4059 | |
2d91e895 TM |
4060 | status = lookup_clientid(clientid, cstate, nn); |
4061 | if (status) | |
4062 | return status; | |
4063 | clp = cstate->clp; | |
4064 | ||
d4f0489f TM |
4065 | strhashval = ownerstr_hashval(&open->op_owner); |
4066 | oo = find_openstateowner_str(strhashval, open, clp); | |
fe0750e5 BF |
4067 | open->op_openowner = oo; |
4068 | if (!oo) { | |
bcf130f9 | 4069 | goto new_owner; |
1da177e4 | 4070 | } |
dad1c067 | 4071 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
0f442aa2 | 4072 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
4073 | release_openowner(oo); |
4074 | open->op_openowner = NULL; | |
bcf130f9 | 4075 | goto new_owner; |
0f442aa2 | 4076 | } |
4cdc951b BF |
4077 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
4078 | if (status) | |
4079 | return status; | |
4cdc951b | 4080 | goto alloc_stateid; |
bcf130f9 | 4081 | new_owner: |
13d6f66b | 4082 | oo = alloc_init_open_stateowner(strhashval, open, cstate); |
bcf130f9 BF |
4083 | if (oo == NULL) |
4084 | return nfserr_jukebox; | |
4085 | open->op_openowner = oo; | |
4cdc951b | 4086 | alloc_stateid: |
b49e084d | 4087 | open->op_stp = nfs4_alloc_open_stateid(clp); |
4cdc951b BF |
4088 | if (!open->op_stp) |
4089 | return nfserr_jukebox; | |
8287f009 SB |
4090 | |
4091 | if (nfsd4_has_session(cstate) && | |
4092 | (cstate->current_fh.fh_export->ex_flags & NFSEXP_PNFS)) { | |
4093 | open->op_odstate = alloc_clnt_odstate(clp); | |
4094 | if (!open->op_odstate) | |
4095 | return nfserr_jukebox; | |
4096 | } | |
4097 | ||
0f442aa2 | 4098 | return nfs_ok; |
1da177e4 LT |
4099 | } |
4100 | ||
b37ad28b | 4101 | static inline __be32 |
4a6e43e6 N |
4102 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
4103 | { | |
4104 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
4105 | return nfserr_openmode; | |
4106 | else | |
4107 | return nfs_ok; | |
4108 | } | |
4109 | ||
f459e453 | 4110 | static int share_access_to_flags(u32 share_access) |
52f4fb43 | 4111 | { |
f459e453 | 4112 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
52f4fb43 N |
4113 | } |
4114 | ||
38c2f4b1 | 4115 | static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) |
24a0111e | 4116 | { |
f459e453 | 4117 | struct nfs4_stid *ret; |
24a0111e | 4118 | |
95da1b3a AE |
4119 | ret = find_stateid_by_type(cl, s, |
4120 | NFS4_DELEG_STID|NFS4_REVOKED_DELEG_STID); | |
f459e453 BF |
4121 | if (!ret) |
4122 | return NULL; | |
4123 | return delegstateid(ret); | |
24a0111e BF |
4124 | } |
4125 | ||
8b289b2c BF |
4126 | static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) |
4127 | { | |
4128 | return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || | |
4129 | open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; | |
4130 | } | |
4131 | ||
b37ad28b | 4132 | static __be32 |
41d22663 | 4133 | nfs4_check_deleg(struct nfs4_client *cl, struct nfsd4_open *open, |
567d9829 N |
4134 | struct nfs4_delegation **dp) |
4135 | { | |
4136 | int flags; | |
b37ad28b | 4137 | __be32 status = nfserr_bad_stateid; |
dcd94cc2 | 4138 | struct nfs4_delegation *deleg; |
567d9829 | 4139 | |
dcd94cc2 TM |
4140 | deleg = find_deleg_stateid(cl, &open->op_delegate_stateid); |
4141 | if (deleg == NULL) | |
c44c5eeb | 4142 | goto out; |
95da1b3a AE |
4143 | if (deleg->dl_stid.sc_type == NFS4_REVOKED_DELEG_STID) { |
4144 | nfs4_put_stid(&deleg->dl_stid); | |
4145 | if (cl->cl_minorversion) | |
4146 | status = nfserr_deleg_revoked; | |
4147 | goto out; | |
4148 | } | |
24a0111e | 4149 | flags = share_access_to_flags(open->op_share_access); |
dcd94cc2 TM |
4150 | status = nfs4_check_delegmode(deleg, flags); |
4151 | if (status) { | |
4152 | nfs4_put_stid(&deleg->dl_stid); | |
4153 | goto out; | |
4154 | } | |
4155 | *dp = deleg; | |
c44c5eeb | 4156 | out: |
8b289b2c | 4157 | if (!nfsd4_is_deleg_cur(open)) |
c44c5eeb N |
4158 | return nfs_ok; |
4159 | if (status) | |
4160 | return status; | |
dad1c067 | 4161 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
c44c5eeb | 4162 | return nfs_ok; |
567d9829 N |
4163 | } |
4164 | ||
21fb4016 BF |
4165 | static inline int nfs4_access_to_access(u32 nfs4_access) |
4166 | { | |
4167 | int flags = 0; | |
4168 | ||
4169 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
4170 | flags |= NFSD_MAY_READ; | |
4171 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
4172 | flags |= NFSD_MAY_WRITE; | |
4173 | return flags; | |
4174 | } | |
4175 | ||
7e6a72e5 CH |
4176 | static inline __be32 |
4177 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, | |
4178 | struct nfsd4_open *open) | |
4179 | { | |
4180 | struct iattr iattr = { | |
4181 | .ia_valid = ATTR_SIZE, | |
4182 | .ia_size = 0, | |
4183 | }; | |
4184 | if (!open->op_truncate) | |
4185 | return 0; | |
4186 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
4187 | return nfserr_inval; | |
4188 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); | |
4189 | } | |
4190 | ||
0c12eaff | 4191 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
6eb3a1d0 JL |
4192 | struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp, |
4193 | struct nfsd4_open *open) | |
f9d7562f | 4194 | { |
de18643d | 4195 | struct file *filp = NULL; |
f9d7562f | 4196 | __be32 status; |
0c12eaff CB |
4197 | int oflag = nfs4_access_to_omode(open->op_share_access); |
4198 | int access = nfs4_access_to_access(open->op_share_access); | |
baeb4ff0 | 4199 | unsigned char old_access_bmap, old_deny_bmap; |
0c12eaff | 4200 | |
de18643d | 4201 | spin_lock(&fp->fi_lock); |
baeb4ff0 JL |
4202 | |
4203 | /* | |
4204 | * Are we trying to set a deny mode that would conflict with | |
4205 | * current access? | |
4206 | */ | |
4207 | status = nfs4_file_check_deny(fp, open->op_share_deny); | |
4208 | if (status != nfs_ok) { | |
4209 | spin_unlock(&fp->fi_lock); | |
4210 | goto out; | |
4211 | } | |
4212 | ||
4213 | /* set access to the file */ | |
4214 | status = nfs4_file_get_access(fp, open->op_share_access); | |
4215 | if (status != nfs_ok) { | |
4216 | spin_unlock(&fp->fi_lock); | |
4217 | goto out; | |
4218 | } | |
4219 | ||
4220 | /* Set access bits in stateid */ | |
4221 | old_access_bmap = stp->st_access_bmap; | |
4222 | set_access(open->op_share_access, stp); | |
4223 | ||
4224 | /* Set new deny mask */ | |
4225 | old_deny_bmap = stp->st_deny_bmap; | |
4226 | set_deny(open->op_share_deny, stp); | |
4227 | fp->fi_share_deny |= (open->op_share_deny & NFS4_SHARE_DENY_BOTH); | |
4228 | ||
f9d7562f | 4229 | if (!fp->fi_fds[oflag]) { |
de18643d TM |
4230 | spin_unlock(&fp->fi_lock); |
4231 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, &filp); | |
f9d7562f | 4232 | if (status) |
baeb4ff0 | 4233 | goto out_put_access; |
de18643d TM |
4234 | spin_lock(&fp->fi_lock); |
4235 | if (!fp->fi_fds[oflag]) { | |
4236 | fp->fi_fds[oflag] = filp; | |
4237 | filp = NULL; | |
4238 | } | |
f9d7562f | 4239 | } |
de18643d TM |
4240 | spin_unlock(&fp->fi_lock); |
4241 | if (filp) | |
4242 | fput(filp); | |
f9d7562f | 4243 | |
7e6a72e5 CH |
4244 | status = nfsd4_truncate(rqstp, cur_fh, open); |
4245 | if (status) | |
4246 | goto out_put_access; | |
7e6a72e5 CH |
4247 | out: |
4248 | return status; | |
baeb4ff0 JL |
4249 | out_put_access: |
4250 | stp->st_access_bmap = old_access_bmap; | |
4251 | nfs4_file_put_access(fp, open->op_share_access); | |
4252 | reset_union_bmap_deny(bmap_to_share_mode(old_deny_bmap), stp); | |
4253 | goto out; | |
1da177e4 LT |
4254 | } |
4255 | ||
b37ad28b | 4256 | static __be32 |
dcef0413 | 4257 | 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 | 4258 | { |
b37ad28b | 4259 | __be32 status; |
6ac75368 | 4260 | unsigned char old_deny_bmap = stp->st_deny_bmap; |
1da177e4 | 4261 | |
6eb3a1d0 | 4262 | if (!test_access(open->op_share_access, stp)) |
baeb4ff0 | 4263 | return nfs4_get_vfs_file(rqstp, fp, cur_fh, stp, open); |
7e6a72e5 | 4264 | |
baeb4ff0 JL |
4265 | /* test and set deny mode */ |
4266 | spin_lock(&fp->fi_lock); | |
4267 | status = nfs4_file_check_deny(fp, open->op_share_deny); | |
4268 | if (status == nfs_ok) { | |
baeb4ff0 JL |
4269 | set_deny(open->op_share_deny, stp); |
4270 | fp->fi_share_deny |= | |
4271 | (open->op_share_deny & NFS4_SHARE_DENY_BOTH); | |
4272 | } | |
4273 | spin_unlock(&fp->fi_lock); | |
4274 | ||
4275 | if (status != nfs_ok) | |
1da177e4 | 4276 | return status; |
1da177e4 | 4277 | |
baeb4ff0 JL |
4278 | status = nfsd4_truncate(rqstp, cur_fh, open); |
4279 | if (status != nfs_ok) | |
4280 | reset_union_bmap_deny(old_deny_bmap, stp); | |
4281 | return status; | |
4282 | } | |
1da177e4 | 4283 | |
14a24e99 BF |
4284 | /* Should we give out recallable state?: */ |
4285 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
4286 | { | |
4287 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
4288 | return true; | |
4289 | /* | |
4290 | * In the sessions case, since we don't have to establish a | |
4291 | * separate connection for callbacks, we assume it's OK | |
4292 | * until we hear otherwise: | |
4293 | */ | |
4294 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
4295 | } | |
4296 | ||
653e514e BF |
4297 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, |
4298 | int flag) | |
22d38c4c BF |
4299 | { |
4300 | struct file_lock *fl; | |
4301 | ||
4302 | fl = locks_alloc_lock(); | |
4303 | if (!fl) | |
4304 | return NULL; | |
22d38c4c | 4305 | fl->fl_lmops = &nfsd_lease_mng_ops; |
617588d5 | 4306 | fl->fl_flags = FL_DELEG; |
22d38c4c BF |
4307 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; |
4308 | fl->fl_end = OFFSET_MAX; | |
653e514e | 4309 | fl->fl_owner = (fl_owner_t)dp; |
22d38c4c | 4310 | fl->fl_pid = current->tgid; |
353601e7 | 4311 | fl->fl_file = dp->dl_stid.sc_file->fi_deleg_file; |
22d38c4c BF |
4312 | return fl; |
4313 | } | |
4314 | ||
0b26693c JL |
4315 | static struct nfs4_delegation * |
4316 | nfs4_set_delegation(struct nfs4_client *clp, struct svc_fh *fh, | |
8287f009 | 4317 | struct nfs4_file *fp, struct nfs4_clnt_odstate *odstate) |
acfdf5c3 | 4318 | { |
68b18f52 | 4319 | int status = 0; |
0b26693c | 4320 | struct nfs4_delegation *dp; |
353601e7 BF |
4321 | struct file *filp; |
4322 | struct file_lock *fl; | |
417c6629 | 4323 | |
353601e7 BF |
4324 | /* |
4325 | * The fi_had_conflict and nfs_get_existing_delegation checks | |
4326 | * here are just optimizations; we'll need to recheck them at | |
4327 | * the end: | |
4328 | */ | |
bf7bd3e9 | 4329 | if (fp->fi_had_conflict) |
0b26693c JL |
4330 | return ERR_PTR(-EAGAIN); |
4331 | ||
353601e7 BF |
4332 | filp = find_readable_file(fp); |
4333 | if (!filp) { | |
4334 | /* We should always have a readable file here */ | |
4335 | WARN_ON_ONCE(1); | |
4336 | return ERR_PTR(-EBADF); | |
4337 | } | |
34ed9872 AE |
4338 | spin_lock(&state_lock); |
4339 | spin_lock(&fp->fi_lock); | |
68b18f52 BF |
4340 | if (nfs4_delegation_exists(clp, fp)) |
4341 | status = -EAGAIN; | |
353601e7 BF |
4342 | else if (!fp->fi_deleg_file) { |
4343 | fp->fi_deleg_file = filp; | |
4344 | /* increment early to prevent fi_deleg_file from being | |
4345 | * cleared */ | |
4346 | fp->fi_delegees = 1; | |
4347 | filp = NULL; | |
4348 | } else | |
4349 | fp->fi_delegees++; | |
34ed9872 AE |
4350 | spin_unlock(&fp->fi_lock); |
4351 | spin_unlock(&state_lock); | |
353601e7 BF |
4352 | if (filp) |
4353 | fput(filp); | |
34ed9872 AE |
4354 | if (status) |
4355 | return ERR_PTR(status); | |
4356 | ||
353601e7 | 4357 | status = -ENOMEM; |
86d29b10 | 4358 | dp = alloc_init_deleg(clp, fp, fh, odstate); |
0b26693c | 4359 | if (!dp) |
353601e7 BF |
4360 | goto out_delegees; |
4361 | ||
4362 | fl = nfs4_alloc_init_lease(dp, NFS4_OPEN_DELEGATE_READ); | |
4363 | if (!fl) | |
4364 | goto out_stid; | |
4365 | ||
4366 | status = vfs_setlease(fp->fi_deleg_file, fl->fl_type, &fl, NULL); | |
4367 | if (fl) | |
4368 | locks_free_lock(fl); | |
4369 | if (status) | |
4370 | goto out_clnt_odstate; | |
0b26693c | 4371 | |
417c6629 JL |
4372 | spin_lock(&state_lock); |
4373 | spin_lock(&fp->fi_lock); | |
353601e7 | 4374 | if (fp->fi_had_conflict) |
417c6629 | 4375 | status = -EAGAIN; |
353601e7 BF |
4376 | else |
4377 | status = hash_delegation_locked(dp, fp); | |
417c6629 | 4378 | spin_unlock(&fp->fi_lock); |
cdc97505 | 4379 | spin_unlock(&state_lock); |
353601e7 BF |
4380 | |
4381 | if (status) | |
692ad280 AE |
4382 | goto out_unlock; |
4383 | ||
0b26693c | 4384 | return dp; |
692ad280 AE |
4385 | out_unlock: |
4386 | vfs_setlease(fp->fi_deleg_file, F_UNLCK, NULL, (void **)&dp); | |
353601e7 BF |
4387 | out_clnt_odstate: |
4388 | put_clnt_odstate(dp->dl_clnt_odstate); | |
4389 | out_stid: | |
4390 | nfs4_put_stid(&dp->dl_stid); | |
4391 | out_delegees: | |
4392 | put_deleg_file(fp); | |
4393 | return ERR_PTR(status); | |
edab9782 BF |
4394 | } |
4395 | ||
4aa8913c BH |
4396 | static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) |
4397 | { | |
4398 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
4399 | if (status == -EAGAIN) | |
4400 | open->op_why_no_deleg = WND4_CONTENTION; | |
4401 | else { | |
4402 | open->op_why_no_deleg = WND4_RESOURCE; | |
4403 | switch (open->op_deleg_want) { | |
4404 | case NFS4_SHARE_WANT_READ_DELEG: | |
4405 | case NFS4_SHARE_WANT_WRITE_DELEG: | |
4406 | case NFS4_SHARE_WANT_ANY_DELEG: | |
4407 | break; | |
4408 | case NFS4_SHARE_WANT_CANCEL: | |
4409 | open->op_why_no_deleg = WND4_CANCELLED; | |
4410 | break; | |
4411 | case NFS4_SHARE_WANT_NO_DELEG: | |
063b0fb9 | 4412 | WARN_ON_ONCE(1); |
4aa8913c BH |
4413 | } |
4414 | } | |
4415 | } | |
4416 | ||
1da177e4 LT |
4417 | /* |
4418 | * Attempt to hand out a delegation. | |
99c41515 BF |
4419 | * |
4420 | * Note we don't support write delegations, and won't until the vfs has | |
4421 | * proper support for them. | |
1da177e4 LT |
4422 | */ |
4423 | static void | |
4cf59221 JL |
4424 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, |
4425 | struct nfs4_ol_stateid *stp) | |
1da177e4 LT |
4426 | { |
4427 | struct nfs4_delegation *dp; | |
4cf59221 JL |
4428 | struct nfs4_openowner *oo = openowner(stp->st_stateowner); |
4429 | struct nfs4_client *clp = stp->st_stid.sc_client; | |
14a24e99 | 4430 | int cb_up; |
99c41515 | 4431 | int status = 0; |
1da177e4 | 4432 | |
fe0750e5 | 4433 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
7b190fec N |
4434 | open->op_recall = 0; |
4435 | switch (open->op_claim_type) { | |
4436 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 4437 | if (!cb_up) |
7b190fec | 4438 | open->op_recall = 1; |
99c41515 BF |
4439 | if (open->op_delegate_type != NFS4_OPEN_DELEGATE_READ) |
4440 | goto out_no_deleg; | |
7b190fec N |
4441 | break; |
4442 | case NFS4_OPEN_CLAIM_NULL: | |
ed47b062 | 4443 | case NFS4_OPEN_CLAIM_FH: |
99c41515 BF |
4444 | /* |
4445 | * Let's not give out any delegations till everyone's | |
c87fb4a3 BF |
4446 | * had the chance to reclaim theirs, *and* until |
4447 | * NLM locks have all been reclaimed: | |
99c41515 | 4448 | */ |
4cf59221 | 4449 | if (locks_in_grace(clp->net)) |
99c41515 | 4450 | goto out_no_deleg; |
dad1c067 | 4451 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
99c41515 | 4452 | goto out_no_deleg; |
9a0590ae SD |
4453 | /* |
4454 | * Also, if the file was opened for write or | |
4455 | * create, there's a good chance the client's | |
4456 | * about to write to it, resulting in an | |
4457 | * immediate recall (since we don't support | |
4458 | * write delegations): | |
4459 | */ | |
7b190fec | 4460 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
99c41515 BF |
4461 | goto out_no_deleg; |
4462 | if (open->op_create == NFS4_OPEN_CREATE) | |
4463 | goto out_no_deleg; | |
7b190fec N |
4464 | break; |
4465 | default: | |
99c41515 | 4466 | goto out_no_deleg; |
7b190fec | 4467 | } |
8287f009 | 4468 | dp = nfs4_set_delegation(clp, fh, stp->st_stid.sc_file, stp->st_clnt_odstate); |
0b26693c | 4469 | if (IS_ERR(dp)) |
dd239cc0 | 4470 | goto out_no_deleg; |
1da177e4 | 4471 | |
d5477a8d | 4472 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 4473 | |
8c10cbdb | 4474 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
d5477a8d | 4475 | STATEID_VAL(&dp->dl_stid.sc_stateid)); |
99c41515 | 4476 | open->op_delegate_type = NFS4_OPEN_DELEGATE_READ; |
67cb1279 | 4477 | nfs4_put_stid(&dp->dl_stid); |
dd239cc0 | 4478 | return; |
dd239cc0 | 4479 | out_no_deleg: |
99c41515 BF |
4480 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE; |
4481 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && | |
d08d32e6 | 4482 | open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) { |
99c41515 | 4483 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
d08d32e6 BF |
4484 | open->op_recall = 1; |
4485 | } | |
99c41515 BF |
4486 | |
4487 | /* 4.1 client asking for a delegation? */ | |
4488 | if (open->op_deleg_want) | |
4489 | nfsd4_open_deleg_none_ext(open, status); | |
4490 | return; | |
1da177e4 LT |
4491 | } |
4492 | ||
e27f49c3 BH |
4493 | static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, |
4494 | struct nfs4_delegation *dp) | |
4495 | { | |
4496 | if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && | |
4497 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
4498 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
4499 | open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; | |
4500 | } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && | |
4501 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
4502 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
4503 | open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; | |
4504 | } | |
4505 | /* Otherwise the client must be confused wanting a delegation | |
4506 | * it already has, therefore we don't return | |
4507 | * NFS4_OPEN_DELEGATE_NONE_EXT and reason. | |
4508 | */ | |
4509 | } | |
4510 | ||
b37ad28b | 4511 | __be32 |
1da177e4 LT |
4512 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
4513 | { | |
6668958f | 4514 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
38c2f4b1 | 4515 | struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; |
1da177e4 | 4516 | struct nfs4_file *fp = NULL; |
dcef0413 | 4517 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 4518 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 4519 | __be32 status; |
d8a1a000 | 4520 | bool new_stp = false; |
1da177e4 | 4521 | |
1da177e4 LT |
4522 | /* |
4523 | * Lookup file; if found, lookup stateid and check open request, | |
4524 | * and check for delegations in the process of being recalled. | |
4525 | * If not found, create the nfs4_file struct | |
4526 | */ | |
f9c00c3a | 4527 | fp = find_or_add_file(open->op_file, ¤t_fh->fh_handle); |
950e0118 | 4528 | if (fp != open->op_file) { |
41d22663 | 4529 | status = nfs4_check_deleg(cl, open, &dp); |
c44c5eeb N |
4530 | if (status) |
4531 | goto out; | |
15ca08d3 | 4532 | stp = nfsd4_find_and_lock_existing_open(fp, open); |
1da177e4 | 4533 | } else { |
950e0118 | 4534 | open->op_file = NULL; |
c44c5eeb | 4535 | status = nfserr_bad_stateid; |
8b289b2c | 4536 | if (nfsd4_is_deleg_cur(open)) |
c44c5eeb | 4537 | goto out; |
1da177e4 LT |
4538 | } |
4539 | ||
d8a1a000 TM |
4540 | if (!stp) { |
4541 | stp = init_open_stateid(fp, open); | |
4542 | if (!open->op_stp) | |
4543 | new_stp = true; | |
4544 | } | |
4545 | ||
1da177e4 LT |
4546 | /* |
4547 | * OPEN the file, or upgrade an existing OPEN. | |
4548 | * If truncate fails, the OPEN fails. | |
d8a1a000 TM |
4549 | * |
4550 | * stp is already locked. | |
1da177e4 | 4551 | */ |
d8a1a000 | 4552 | if (!new_stp) { |
1da177e4 | 4553 | /* Stateid was found, this is an OPEN upgrade */ |
f9d7562f | 4554 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
35a92fe8 | 4555 | if (status) { |
feb9dad5 | 4556 | mutex_unlock(&stp->st_mutex); |
1da177e4 | 4557 | goto out; |
35a92fe8 | 4558 | } |
1da177e4 | 4559 | } else { |
6eb3a1d0 JL |
4560 | status = nfs4_get_vfs_file(rqstp, fp, current_fh, stp, open); |
4561 | if (status) { | |
d8a1a000 | 4562 | stp->st_stid.sc_type = NFS4_CLOSED_STID; |
6eb3a1d0 | 4563 | release_open_stateid(stp); |
d8a1a000 | 4564 | mutex_unlock(&stp->st_mutex); |
6eb3a1d0 JL |
4565 | goto out; |
4566 | } | |
8287f009 SB |
4567 | |
4568 | stp->st_clnt_odstate = find_or_hash_clnt_odstate(fp, | |
4569 | open->op_odstate); | |
4570 | if (stp->st_clnt_odstate == open->op_odstate) | |
4571 | open->op_odstate = NULL; | |
1da177e4 | 4572 | } |
d8a1a000 | 4573 | |
9767feb2 | 4574 | nfs4_inc_and_copy_stateid(&open->op_stateid, &stp->st_stid); |
feb9dad5 | 4575 | mutex_unlock(&stp->st_mutex); |
1da177e4 | 4576 | |
d24433cd | 4577 | if (nfsd4_has_session(&resp->cstate)) { |
d24433cd BH |
4578 | if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { |
4579 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
4580 | open->op_why_no_deleg = WND4_NOT_WANTED; | |
4581 | goto nodeleg; | |
4582 | } | |
4583 | } | |
4584 | ||
1da177e4 LT |
4585 | /* |
4586 | * Attempt to hand out a delegation. No error return, because the | |
4587 | * OPEN succeeds even if we fail. | |
4588 | */ | |
4cf59221 | 4589 | nfs4_open_delegation(current_fh, open, stp); |
d24433cd | 4590 | nodeleg: |
1da177e4 LT |
4591 | status = nfs_ok; |
4592 | ||
8c10cbdb | 4593 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
dcef0413 | 4594 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
1da177e4 | 4595 | out: |
d24433cd BH |
4596 | /* 4.1 client trying to upgrade/downgrade delegation? */ |
4597 | if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && | |
e27f49c3 BH |
4598 | open->op_deleg_want) |
4599 | nfsd4_deleg_xgrade_none_ext(open, dp); | |
d24433cd | 4600 | |
13cd2184 N |
4601 | if (fp) |
4602 | put_nfs4_file(fp); | |
37515177 | 4603 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
87186022 | 4604 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
1da177e4 LT |
4605 | /* |
4606 | * To finish the open response, we just need to set the rflags. | |
4607 | */ | |
4608 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
19e4c347 JL |
4609 | if (nfsd4_has_session(&resp->cstate)) |
4610 | open->op_rflags |= NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK; | |
4611 | else if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED)) | |
1da177e4 | 4612 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
19e4c347 | 4613 | |
dcd94cc2 TM |
4614 | if (dp) |
4615 | nfs4_put_stid(&dp->dl_stid); | |
d6f2bc5d TM |
4616 | if (stp) |
4617 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 LT |
4618 | |
4619 | return status; | |
4620 | } | |
4621 | ||
58fb12e6 | 4622 | void nfsd4_cleanup_open_state(struct nfsd4_compound_state *cstate, |
42297899 | 4623 | struct nfsd4_open *open) |
d29b20cd BF |
4624 | { |
4625 | if (open->op_openowner) { | |
d3134b10 JL |
4626 | struct nfs4_stateowner *so = &open->op_openowner->oo_owner; |
4627 | ||
4628 | nfsd4_cstate_assign_replay(cstate, so); | |
4629 | nfs4_put_stateowner(so); | |
d29b20cd | 4630 | } |
32513b40 | 4631 | if (open->op_file) |
5b095e99 | 4632 | kmem_cache_free(file_slab, open->op_file); |
4cdc951b | 4633 | if (open->op_stp) |
6011695d | 4634 | nfs4_put_stid(&open->op_stp->st_stid); |
8287f009 SB |
4635 | if (open->op_odstate) |
4636 | kmem_cache_free(odstate_slab, open->op_odstate); | |
d29b20cd BF |
4637 | } |
4638 | ||
b37ad28b | 4639 | __be32 |
b591480b | 4640 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 4641 | union nfsd4_op_u *u) |
1da177e4 | 4642 | { |
eb69853d | 4643 | clientid_t *clid = &u->renew; |
1da177e4 | 4644 | struct nfs4_client *clp; |
b37ad28b | 4645 | __be32 status; |
7f2210fa | 4646 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4647 | |
1da177e4 LT |
4648 | dprintk("process_renew(%08x/%08x): starting\n", |
4649 | clid->cl_boot, clid->cl_id); | |
4b24ca7d | 4650 | status = lookup_clientid(clid, cstate, nn); |
9b2ef62b | 4651 | if (status) |
1da177e4 | 4652 | goto out; |
4b24ca7d | 4653 | clp = cstate->clp; |
1da177e4 | 4654 | status = nfserr_cb_path_down; |
ea1da636 | 4655 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 4656 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
4657 | goto out; |
4658 | status = nfs_ok; | |
4659 | out: | |
1da177e4 LT |
4660 | return status; |
4661 | } | |
4662 | ||
7f5ef2e9 | 4663 | void |
12760c66 | 4664 | nfsd4_end_grace(struct nfsd_net *nn) |
a76b4319 | 4665 | { |
33dcc481 | 4666 | /* do nothing if grace period already ended */ |
a51c84ed | 4667 | if (nn->grace_ended) |
33dcc481 JL |
4668 | return; |
4669 | ||
a76b4319 | 4670 | dprintk("NFSD: end of grace period\n"); |
a51c84ed | 4671 | nn->grace_ended = true; |
70b28235 BF |
4672 | /* |
4673 | * If the server goes down again right now, an NFSv4 | |
4674 | * client will still be allowed to reclaim after it comes back up, | |
4675 | * even if it hasn't yet had a chance to reclaim state this time. | |
4676 | * | |
4677 | */ | |
919b8049 | 4678 | nfsd4_record_grace_done(nn); |
70b28235 BF |
4679 | /* |
4680 | * At this point, NFSv4 clients can still reclaim. But if the | |
4681 | * server crashes, any that have not yet reclaimed will be out | |
4682 | * of luck on the next boot. | |
4683 | * | |
4684 | * (NFSv4.1+ clients are considered to have reclaimed once they | |
4685 | * call RECLAIM_COMPLETE. NFSv4.0 clients are considered to | |
4686 | * have reclaimed after their first OPEN.) | |
4687 | */ | |
5e1533c7 | 4688 | locks_end_grace(&nn->nfsd4_manager); |
70b28235 BF |
4689 | /* |
4690 | * At this point, and once lockd and/or any other containers | |
4691 | * exit their grace period, further reclaims will fail and | |
4692 | * regular locking can resume. | |
4693 | */ | |
a76b4319 N |
4694 | } |
4695 | ||
fd39ca9a | 4696 | static time_t |
09121281 | 4697 | nfs4_laundromat(struct nfsd_net *nn) |
1da177e4 LT |
4698 | { |
4699 | struct nfs4_client *clp; | |
fe0750e5 | 4700 | struct nfs4_openowner *oo; |
1da177e4 | 4701 | struct nfs4_delegation *dp; |
217526e7 | 4702 | struct nfs4_ol_stateid *stp; |
7919d0a2 | 4703 | struct nfsd4_blocked_lock *nbl; |
1da177e4 | 4704 | struct list_head *pos, *next, reaplist; |
3d733711 | 4705 | time_t cutoff = get_seconds() - nn->nfsd4_lease; |
a832e7ae | 4706 | time_t t, new_timeo = nn->nfsd4_lease; |
1da177e4 | 4707 | |
1da177e4 | 4708 | dprintk("NFSD: laundromat service - starting\n"); |
12760c66 | 4709 | nfsd4_end_grace(nn); |
36acb66b | 4710 | INIT_LIST_HEAD(&reaplist); |
c9a49628 | 4711 | spin_lock(&nn->client_lock); |
5ed58bb2 | 4712 | list_for_each_safe(pos, next, &nn->client_lru) { |
1da177e4 LT |
4713 | clp = list_entry(pos, struct nfs4_client, cl_lru); |
4714 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
4715 | t = clp->cl_time - cutoff; | |
a832e7ae | 4716 | new_timeo = min(new_timeo, t); |
1da177e4 LT |
4717 | break; |
4718 | } | |
221a6876 | 4719 | if (mark_client_expired_locked(clp)) { |
d7682988 BH |
4720 | dprintk("NFSD: client in use (clientid %08x)\n", |
4721 | clp->cl_clientid.cl_id); | |
4722 | continue; | |
4723 | } | |
4864af97 | 4724 | list_add(&clp->cl_lru, &reaplist); |
36acb66b | 4725 | } |
c9a49628 | 4726 | spin_unlock(&nn->client_lock); |
36acb66b BH |
4727 | list_for_each_safe(pos, next, &reaplist) { |
4728 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
4729 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
4730 | clp->cl_clientid.cl_id); | |
4864af97 | 4731 | list_del_init(&clp->cl_lru); |
1da177e4 LT |
4732 | expire_client(clp); |
4733 | } | |
cdc97505 | 4734 | spin_lock(&state_lock); |
e8c69d17 | 4735 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 LT |
4736 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
4737 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
a832e7ae JL |
4738 | t = dp->dl_time - cutoff; |
4739 | new_timeo = min(new_timeo, t); | |
1da177e4 LT |
4740 | break; |
4741 | } | |
3fcbbd24 | 4742 | WARN_ON(!unhash_delegation_locked(dp)); |
42690676 | 4743 | list_add(&dp->dl_recall_lru, &reaplist); |
1da177e4 | 4744 | } |
cdc97505 | 4745 | spin_unlock(&state_lock); |
2d4a532d JL |
4746 | while (!list_empty(&reaplist)) { |
4747 | dp = list_first_entry(&reaplist, struct nfs4_delegation, | |
4748 | dl_recall_lru); | |
4749 | list_del_init(&dp->dl_recall_lru); | |
3bd64a5b | 4750 | revoke_delegation(dp); |
1da177e4 | 4751 | } |
217526e7 JL |
4752 | |
4753 | spin_lock(&nn->client_lock); | |
4754 | while (!list_empty(&nn->close_lru)) { | |
4755 | oo = list_first_entry(&nn->close_lru, struct nfs4_openowner, | |
4756 | oo_close_lru); | |
4757 | if (time_after((unsigned long)oo->oo_time, | |
4758 | (unsigned long)cutoff)) { | |
a832e7ae JL |
4759 | t = oo->oo_time - cutoff; |
4760 | new_timeo = min(new_timeo, t); | |
1da177e4 LT |
4761 | break; |
4762 | } | |
217526e7 JL |
4763 | list_del_init(&oo->oo_close_lru); |
4764 | stp = oo->oo_last_closed_stid; | |
4765 | oo->oo_last_closed_stid = NULL; | |
4766 | spin_unlock(&nn->client_lock); | |
4767 | nfs4_put_stid(&stp->st_stid); | |
4768 | spin_lock(&nn->client_lock); | |
1da177e4 | 4769 | } |
217526e7 JL |
4770 | spin_unlock(&nn->client_lock); |
4771 | ||
7919d0a2 JL |
4772 | /* |
4773 | * It's possible for a client to try and acquire an already held lock | |
4774 | * that is being held for a long time, and then lose interest in it. | |
4775 | * So, we clean out any un-revisited request after a lease period | |
4776 | * under the assumption that the client is no longer interested. | |
4777 | * | |
4778 | * RFC5661, sec. 9.6 states that the client must not rely on getting | |
4779 | * notifications and must continue to poll for locks, even when the | |
4780 | * server supports them. Thus this shouldn't lead to clients blocking | |
4781 | * indefinitely once the lock does become free. | |
4782 | */ | |
4783 | BUG_ON(!list_empty(&reaplist)); | |
0cc11a61 | 4784 | spin_lock(&nn->blocked_locks_lock); |
7919d0a2 JL |
4785 | while (!list_empty(&nn->blocked_locks_lru)) { |
4786 | nbl = list_first_entry(&nn->blocked_locks_lru, | |
4787 | struct nfsd4_blocked_lock, nbl_lru); | |
4788 | if (time_after((unsigned long)nbl->nbl_time, | |
4789 | (unsigned long)cutoff)) { | |
4790 | t = nbl->nbl_time - cutoff; | |
4791 | new_timeo = min(new_timeo, t); | |
4792 | break; | |
4793 | } | |
4794 | list_move(&nbl->nbl_lru, &reaplist); | |
4795 | list_del_init(&nbl->nbl_list); | |
4796 | } | |
0cc11a61 | 4797 | spin_unlock(&nn->blocked_locks_lock); |
7919d0a2 JL |
4798 | |
4799 | while (!list_empty(&reaplist)) { | |
64ebe124 | 4800 | nbl = list_first_entry(&reaplist, |
7919d0a2 JL |
4801 | struct nfsd4_blocked_lock, nbl_lru); |
4802 | list_del_init(&nbl->nbl_lru); | |
4803 | posix_unblock_lock(&nbl->nbl_lock); | |
4804 | free_blocked_lock(nbl); | |
4805 | } | |
4806 | ||
a832e7ae | 4807 | new_timeo = max_t(time_t, new_timeo, NFSD_LAUNDROMAT_MINTIMEOUT); |
a832e7ae | 4808 | return new_timeo; |
1da177e4 LT |
4809 | } |
4810 | ||
a254b246 HH |
4811 | static struct workqueue_struct *laundry_wq; |
4812 | static void laundromat_main(struct work_struct *); | |
a254b246 HH |
4813 | |
4814 | static void | |
09121281 | 4815 | laundromat_main(struct work_struct *laundry) |
1da177e4 LT |
4816 | { |
4817 | time_t t; | |
2e55f3ab | 4818 | struct delayed_work *dwork = to_delayed_work(laundry); |
09121281 SK |
4819 | struct nfsd_net *nn = container_of(dwork, struct nfsd_net, |
4820 | laundromat_work); | |
1da177e4 | 4821 | |
09121281 | 4822 | t = nfs4_laundromat(nn); |
1da177e4 | 4823 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); |
09121281 | 4824 | queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ); |
1da177e4 LT |
4825 | } |
4826 | ||
8fcd461d | 4827 | static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stid *stp) |
1da177e4 | 4828 | { |
8fcd461d | 4829 | if (!fh_match(&fhp->fh_handle, &stp->sc_file->fi_fhandle)) |
f7a4d872 BF |
4830 | return nfserr_bad_stateid; |
4831 | return nfs_ok; | |
1da177e4 LT |
4832 | } |
4833 | ||
1da177e4 | 4834 | static inline int |
82c5ff1b | 4835 | access_permit_read(struct nfs4_ol_stateid *stp) |
1da177e4 | 4836 | { |
82c5ff1b JL |
4837 | return test_access(NFS4_SHARE_ACCESS_READ, stp) || |
4838 | test_access(NFS4_SHARE_ACCESS_BOTH, stp) || | |
4839 | test_access(NFS4_SHARE_ACCESS_WRITE, stp); | |
1da177e4 LT |
4840 | } |
4841 | ||
4842 | static inline int | |
82c5ff1b | 4843 | access_permit_write(struct nfs4_ol_stateid *stp) |
1da177e4 | 4844 | { |
82c5ff1b JL |
4845 | return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || |
4846 | test_access(NFS4_SHARE_ACCESS_BOTH, stp); | |
1da177e4 LT |
4847 | } |
4848 | ||
4849 | static | |
dcef0413 | 4850 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
1da177e4 | 4851 | { |
b37ad28b | 4852 | __be32 status = nfserr_openmode; |
1da177e4 | 4853 | |
02921914 BF |
4854 | /* For lock stateid's, we test the parent open, not the lock: */ |
4855 | if (stp->st_openstp) | |
4856 | stp = stp->st_openstp; | |
82c5ff1b | 4857 | if ((flags & WR_STATE) && !access_permit_write(stp)) |
1da177e4 | 4858 | goto out; |
82c5ff1b | 4859 | if ((flags & RD_STATE) && !access_permit_read(stp)) |
1da177e4 LT |
4860 | goto out; |
4861 | status = nfs_ok; | |
4862 | out: | |
4863 | return status; | |
4864 | } | |
4865 | ||
b37ad28b | 4866 | static inline __be32 |
5ccb0066 | 4867 | check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags) |
1da177e4 | 4868 | { |
203a8c8e | 4869 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 4870 | return nfs_ok; |
c87fb4a3 | 4871 | else if (opens_in_grace(net)) { |
25985edc | 4872 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
4873 | * conflicting state; so we must wait out the grace period. */ |
4874 | return nfserr_grace; | |
4875 | } else if (flags & WR_STATE) | |
4876 | return nfs4_share_conflict(current_fh, | |
4877 | NFS4_SHARE_DENY_WRITE); | |
4878 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
4879 | return nfs4_share_conflict(current_fh, | |
4880 | NFS4_SHARE_DENY_READ); | |
4881 | } | |
4882 | ||
4883 | /* | |
4884 | * Allow READ/WRITE during grace period on recovered state only for files | |
4885 | * that are not able to provide mandatory locking. | |
4886 | */ | |
4887 | static inline int | |
5ccb0066 | 4888 | grace_disallows_io(struct net *net, struct inode *inode) |
1da177e4 | 4889 | { |
c87fb4a3 | 4890 | return opens_in_grace(net) && mandatory_lock(inode); |
1da177e4 LT |
4891 | } |
4892 | ||
57b7b43b | 4893 | static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 4894 | { |
6668958f AA |
4895 | /* |
4896 | * When sessions are used the stateid generation number is ignored | |
4897 | * when it is zero. | |
4898 | */ | |
28dde241 | 4899 | if (has_session && in->si_generation == 0) |
81b82965 BF |
4900 | return nfs_ok; |
4901 | ||
4902 | if (in->si_generation == ref->si_generation) | |
4903 | return nfs_ok; | |
6668958f | 4904 | |
0836f587 | 4905 | /* If the client sends us a stateid from the future, it's buggy: */ |
14b7f4a1 | 4906 | if (nfsd4_stateid_generation_after(in, ref)) |
0836f587 BF |
4907 | return nfserr_bad_stateid; |
4908 | /* | |
81b82965 BF |
4909 | * However, we could see a stateid from the past, even from a |
4910 | * non-buggy client. For example, if the client sends a lock | |
4911 | * while some IO is outstanding, the lock may bump si_generation | |
4912 | * while the IO is still in flight. The client could avoid that | |
4913 | * situation by waiting for responses on all the IO requests, | |
4914 | * but better performance may result in retrying IO that | |
4915 | * receives an old_stateid error if requests are rarely | |
4916 | * reordered in flight: | |
0836f587 | 4917 | */ |
81b82965 | 4918 | return nfserr_old_stateid; |
0836f587 BF |
4919 | } |
4920 | ||
03da3169 TM |
4921 | static __be32 nfsd4_stid_check_stateid_generation(stateid_t *in, struct nfs4_stid *s, bool has_session) |
4922 | { | |
4923 | __be32 ret; | |
4924 | ||
4925 | spin_lock(&s->sc_lock); | |
4926 | ret = nfsd4_verify_open_stid(s); | |
4927 | if (ret == nfs_ok) | |
4928 | ret = check_stateid_generation(in, &s->sc_stateid, has_session); | |
4929 | spin_unlock(&s->sc_lock); | |
4930 | return ret; | |
4931 | } | |
4932 | ||
ebe9cb3b CH |
4933 | static __be32 nfsd4_check_openowner_confirmed(struct nfs4_ol_stateid *ols) |
4934 | { | |
4935 | if (ols->st_stateowner->so_is_open_owner && | |
4936 | !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) | |
4937 | return nfserr_bad_stateid; | |
4938 | return nfs_ok; | |
4939 | } | |
4940 | ||
7df302f7 | 4941 | static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) |
17456804 | 4942 | { |
97b7e3b6 | 4943 | struct nfs4_stid *s; |
1af71cc8 | 4944 | __be32 status = nfserr_bad_stateid; |
17456804 | 4945 | |
ae254dac AE |
4946 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid) || |
4947 | CLOSE_STATEID(stateid)) | |
1af71cc8 | 4948 | return status; |
7df302f7 CL |
4949 | /* Client debugging aid. */ |
4950 | if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) { | |
4951 | char addr_str[INET6_ADDRSTRLEN]; | |
4952 | rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str, | |
4953 | sizeof(addr_str)); | |
4954 | pr_warn_ratelimited("NFSD: client %s testing state ID " | |
4955 | "with incorrect client ID\n", addr_str); | |
1af71cc8 | 4956 | return status; |
7df302f7 | 4957 | } |
1af71cc8 JL |
4958 | spin_lock(&cl->cl_lock); |
4959 | s = find_stateid_locked(cl, stateid); | |
97b7e3b6 | 4960 | if (!s) |
1af71cc8 | 4961 | goto out_unlock; |
03da3169 | 4962 | status = nfsd4_stid_check_stateid_generation(stateid, s, 1); |
17456804 | 4963 | if (status) |
1af71cc8 | 4964 | goto out_unlock; |
23340032 BF |
4965 | switch (s->sc_type) { |
4966 | case NFS4_DELEG_STID: | |
1af71cc8 JL |
4967 | status = nfs_ok; |
4968 | break; | |
3bd64a5b | 4969 | case NFS4_REVOKED_DELEG_STID: |
1af71cc8 JL |
4970 | status = nfserr_deleg_revoked; |
4971 | break; | |
23340032 BF |
4972 | case NFS4_OPEN_STID: |
4973 | case NFS4_LOCK_STID: | |
ebe9cb3b | 4974 | status = nfsd4_check_openowner_confirmed(openlockstateid(s)); |
1af71cc8 | 4975 | break; |
23340032 BF |
4976 | default: |
4977 | printk("unknown stateid type %x\n", s->sc_type); | |
b0fc29d6 | 4978 | /* Fallthrough */ |
23340032 | 4979 | case NFS4_CLOSED_STID: |
b0fc29d6 | 4980 | case NFS4_CLOSED_DELEG_STID: |
1af71cc8 | 4981 | status = nfserr_bad_stateid; |
23340032 | 4982 | } |
1af71cc8 JL |
4983 | out_unlock: |
4984 | spin_unlock(&cl->cl_lock); | |
4985 | return status; | |
17456804 BS |
4986 | } |
4987 | ||
cd61c522 | 4988 | __be32 |
2dd6e458 TM |
4989 | nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate, |
4990 | stateid_t *stateid, unsigned char typemask, | |
4991 | struct nfs4_stid **s, struct nfsd_net *nn) | |
38c2f4b1 | 4992 | { |
0eb6f20a | 4993 | __be32 status; |
95da1b3a AE |
4994 | bool return_revoked = false; |
4995 | ||
4996 | /* | |
4997 | * only return revoked delegations if explicitly asked. | |
4998 | * otherwise we report revoked or bad_stateid status. | |
4999 | */ | |
5000 | if (typemask & NFS4_REVOKED_DELEG_STID) | |
5001 | return_revoked = true; | |
5002 | else if (typemask & NFS4_DELEG_STID) | |
5003 | typemask |= NFS4_REVOKED_DELEG_STID; | |
38c2f4b1 | 5004 | |
ae254dac AE |
5005 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid) || |
5006 | CLOSE_STATEID(stateid)) | |
38c2f4b1 | 5007 | return nfserr_bad_stateid; |
4b24ca7d | 5008 | status = lookup_clientid(&stateid->si_opaque.so_clid, cstate, nn); |
a8a7c677 | 5009 | if (status == nfserr_stale_clientid) { |
4b24ca7d | 5010 | if (cstate->session) |
a8a7c677 | 5011 | return nfserr_bad_stateid; |
38c2f4b1 | 5012 | return nfserr_stale_stateid; |
a8a7c677 | 5013 | } |
0eb6f20a BF |
5014 | if (status) |
5015 | return status; | |
4b24ca7d | 5016 | *s = find_stateid_by_type(cstate->clp, stateid, typemask); |
38c2f4b1 BF |
5017 | if (!*s) |
5018 | return nfserr_bad_stateid; | |
95da1b3a AE |
5019 | if (((*s)->sc_type == NFS4_REVOKED_DELEG_STID) && !return_revoked) { |
5020 | nfs4_put_stid(*s); | |
5021 | if (cstate->minorversion) | |
5022 | return nfserr_deleg_revoked; | |
5023 | return nfserr_bad_stateid; | |
5024 | } | |
38c2f4b1 | 5025 | return nfs_ok; |
38c2f4b1 BF |
5026 | } |
5027 | ||
a0649b2d CH |
5028 | static struct file * |
5029 | nfs4_find_file(struct nfs4_stid *s, int flags) | |
5030 | { | |
af90f707 CH |
5031 | if (!s) |
5032 | return NULL; | |
5033 | ||
a0649b2d CH |
5034 | switch (s->sc_type) { |
5035 | case NFS4_DELEG_STID: | |
5036 | if (WARN_ON_ONCE(!s->sc_file->fi_deleg_file)) | |
5037 | return NULL; | |
5038 | return get_file(s->sc_file->fi_deleg_file); | |
5039 | case NFS4_OPEN_STID: | |
5040 | case NFS4_LOCK_STID: | |
5041 | if (flags & RD_STATE) | |
5042 | return find_readable_file(s->sc_file); | |
5043 | else | |
5044 | return find_writeable_file(s->sc_file); | |
5045 | break; | |
5046 | } | |
5047 | ||
5048 | return NULL; | |
5049 | } | |
5050 | ||
5051 | static __be32 | |
5052 | nfs4_check_olstateid(struct svc_fh *fhp, struct nfs4_ol_stateid *ols, int flags) | |
5053 | { | |
5054 | __be32 status; | |
5055 | ||
a0649b2d CH |
5056 | status = nfsd4_check_openowner_confirmed(ols); |
5057 | if (status) | |
5058 | return status; | |
5059 | return nfs4_check_openmode(ols, flags); | |
5060 | } | |
5061 | ||
af90f707 CH |
5062 | static __be32 |
5063 | nfs4_check_file(struct svc_rqst *rqstp, struct svc_fh *fhp, struct nfs4_stid *s, | |
5064 | struct file **filpp, bool *tmp_file, int flags) | |
5065 | { | |
5066 | int acc = (flags & RD_STATE) ? NFSD_MAY_READ : NFSD_MAY_WRITE; | |
5067 | struct file *file; | |
5068 | __be32 status; | |
5069 | ||
5070 | file = nfs4_find_file(s, flags); | |
5071 | if (file) { | |
5072 | status = nfsd_permission(rqstp, fhp->fh_export, fhp->fh_dentry, | |
5073 | acc | NFSD_MAY_OWNER_OVERRIDE); | |
5074 | if (status) { | |
5075 | fput(file); | |
5076 | return status; | |
5077 | } | |
5078 | ||
5079 | *filpp = file; | |
5080 | } else { | |
5081 | status = nfsd_open(rqstp, fhp, S_IFREG, acc, filpp); | |
5082 | if (status) | |
5083 | return status; | |
5084 | ||
5085 | if (tmp_file) | |
5086 | *tmp_file = true; | |
5087 | } | |
5088 | ||
5089 | return 0; | |
5090 | } | |
5091 | ||
1da177e4 | 5092 | /* |
a0649b2d CH |
5093 | * Checks for stateid operations |
5094 | */ | |
b37ad28b | 5095 | __be32 |
af90f707 | 5096 | nfs4_preprocess_stateid_op(struct svc_rqst *rqstp, |
aa0d6aed AS |
5097 | struct nfsd4_compound_state *cstate, struct svc_fh *fhp, |
5098 | stateid_t *stateid, int flags, struct file **filpp, bool *tmp_file) | |
1da177e4 | 5099 | { |
a0649b2d | 5100 | struct inode *ino = d_inode(fhp->fh_dentry); |
af90f707 | 5101 | struct net *net = SVC_NET(rqstp); |
3320fef1 | 5102 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
af90f707 | 5103 | struct nfs4_stid *s = NULL; |
b37ad28b | 5104 | __be32 status; |
1da177e4 | 5105 | |
1da177e4 LT |
5106 | if (filpp) |
5107 | *filpp = NULL; | |
af90f707 CH |
5108 | if (tmp_file) |
5109 | *tmp_file = false; | |
1da177e4 | 5110 | |
5ccb0066 | 5111 | if (grace_disallows_io(net, ino)) |
1da177e4 LT |
5112 | return nfserr_grace; |
5113 | ||
af90f707 CH |
5114 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { |
5115 | status = check_special_stateids(net, fhp, stateid, flags); | |
5116 | goto done; | |
5117 | } | |
1da177e4 | 5118 | |
2dd6e458 | 5119 | status = nfsd4_lookup_stateid(cstate, stateid, |
db24b3b4 | 5120 | NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, |
2dd6e458 | 5121 | &s, nn); |
38c2f4b1 | 5122 | if (status) |
c2d1d6a8 | 5123 | return status; |
03da3169 | 5124 | status = nfsd4_stid_check_stateid_generation(stateid, s, |
a0649b2d | 5125 | nfsd4_has_session(cstate)); |
69064a27 BF |
5126 | if (status) |
5127 | goto out; | |
a0649b2d | 5128 | |
f7a4d872 BF |
5129 | switch (s->sc_type) { |
5130 | case NFS4_DELEG_STID: | |
a0649b2d | 5131 | status = nfs4_check_delegmode(delegstateid(s), flags); |
f7a4d872 BF |
5132 | break; |
5133 | case NFS4_OPEN_STID: | |
5134 | case NFS4_LOCK_STID: | |
a0649b2d | 5135 | status = nfs4_check_olstateid(fhp, openlockstateid(s), flags); |
f7a4d872 BF |
5136 | break; |
5137 | default: | |
14bcab1a | 5138 | status = nfserr_bad_stateid; |
a0649b2d CH |
5139 | break; |
5140 | } | |
8fcd461d JL |
5141 | if (status) |
5142 | goto out; | |
5143 | status = nfs4_check_fh(fhp, s); | |
a0649b2d | 5144 | |
af90f707 CH |
5145 | done: |
5146 | if (!status && filpp) | |
5147 | status = nfs4_check_file(rqstp, fhp, s, filpp, tmp_file, flags); | |
1da177e4 | 5148 | out: |
af90f707 CH |
5149 | if (s) |
5150 | nfs4_put_stid(s); | |
1da177e4 LT |
5151 | return status; |
5152 | } | |
5153 | ||
17456804 BS |
5154 | /* |
5155 | * Test if the stateid is valid | |
5156 | */ | |
5157 | __be32 | |
5158 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
eb69853d | 5159 | union nfsd4_op_u *u) |
17456804 | 5160 | { |
eb69853d | 5161 | struct nfsd4_test_stateid *test_stateid = &u->test_stateid; |
03cfb420 BS |
5162 | struct nfsd4_test_stateid_id *stateid; |
5163 | struct nfs4_client *cl = cstate->session->se_client; | |
5164 | ||
03cfb420 | 5165 | list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) |
7df302f7 CL |
5166 | stateid->ts_id_status = |
5167 | nfsd4_validate_stateid(cl, &stateid->ts_id_stateid); | |
03cfb420 | 5168 | |
17456804 BS |
5169 | return nfs_ok; |
5170 | } | |
5171 | ||
42691398 CL |
5172 | static __be32 |
5173 | nfsd4_free_lock_stateid(stateid_t *stateid, struct nfs4_stid *s) | |
5174 | { | |
5175 | struct nfs4_ol_stateid *stp = openlockstateid(s); | |
5176 | __be32 ret; | |
5177 | ||
659aefb6 TM |
5178 | ret = nfsd4_lock_ol_stateid(stp); |
5179 | if (ret) | |
5180 | goto out_put_stid; | |
42691398 CL |
5181 | |
5182 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); | |
5183 | if (ret) | |
5184 | goto out; | |
5185 | ||
5186 | ret = nfserr_locks_held; | |
5187 | if (check_for_locks(stp->st_stid.sc_file, | |
5188 | lockowner(stp->st_stateowner))) | |
5189 | goto out; | |
5190 | ||
5191 | release_lock_stateid(stp); | |
5192 | ret = nfs_ok; | |
5193 | ||
5194 | out: | |
5195 | mutex_unlock(&stp->st_mutex); | |
659aefb6 | 5196 | out_put_stid: |
42691398 CL |
5197 | nfs4_put_stid(s); |
5198 | return ret; | |
5199 | } | |
5200 | ||
e1ca12df BS |
5201 | __be32 |
5202 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
eb69853d | 5203 | union nfsd4_op_u *u) |
e1ca12df | 5204 | { |
eb69853d | 5205 | struct nfsd4_free_stateid *free_stateid = &u->free_stateid; |
e1ca12df | 5206 | stateid_t *stateid = &free_stateid->fr_stateid; |
2da1cec7 | 5207 | struct nfs4_stid *s; |
3bd64a5b | 5208 | struct nfs4_delegation *dp; |
38c2f4b1 | 5209 | struct nfs4_client *cl = cstate->session->se_client; |
2da1cec7 | 5210 | __be32 ret = nfserr_bad_stateid; |
e1ca12df | 5211 | |
1af71cc8 JL |
5212 | spin_lock(&cl->cl_lock); |
5213 | s = find_stateid_locked(cl, stateid); | |
2da1cec7 | 5214 | if (!s) |
1af71cc8 | 5215 | goto out_unlock; |
03da3169 | 5216 | spin_lock(&s->sc_lock); |
2da1cec7 BF |
5217 | switch (s->sc_type) { |
5218 | case NFS4_DELEG_STID: | |
e1ca12df | 5219 | ret = nfserr_locks_held; |
1af71cc8 | 5220 | break; |
2da1cec7 | 5221 | case NFS4_OPEN_STID: |
2da1cec7 BF |
5222 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); |
5223 | if (ret) | |
1af71cc8 JL |
5224 | break; |
5225 | ret = nfserr_locks_held; | |
f7a4d872 | 5226 | break; |
1af71cc8 | 5227 | case NFS4_LOCK_STID: |
03da3169 | 5228 | spin_unlock(&s->sc_lock); |
a15dfcd5 | 5229 | refcount_inc(&s->sc_count); |
1af71cc8 | 5230 | spin_unlock(&cl->cl_lock); |
42691398 | 5231 | ret = nfsd4_free_lock_stateid(stateid, s); |
1af71cc8 | 5232 | goto out; |
3bd64a5b | 5233 | case NFS4_REVOKED_DELEG_STID: |
03da3169 | 5234 | spin_unlock(&s->sc_lock); |
3bd64a5b | 5235 | dp = delegstateid(s); |
2d4a532d JL |
5236 | list_del_init(&dp->dl_recall_lru); |
5237 | spin_unlock(&cl->cl_lock); | |
6011695d | 5238 | nfs4_put_stid(s); |
3bd64a5b | 5239 | ret = nfs_ok; |
1af71cc8 JL |
5240 | goto out; |
5241 | /* Default falls through and returns nfserr_bad_stateid */ | |
e1ca12df | 5242 | } |
03da3169 | 5243 | spin_unlock(&s->sc_lock); |
1af71cc8 JL |
5244 | out_unlock: |
5245 | spin_unlock(&cl->cl_lock); | |
e1ca12df | 5246 | out: |
e1ca12df BS |
5247 | return ret; |
5248 | } | |
5249 | ||
4c4cd222 N |
5250 | static inline int |
5251 | setlkflg (int type) | |
5252 | { | |
5253 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
5254 | RD_STATE : WR_STATE; | |
5255 | } | |
1da177e4 | 5256 | |
dcef0413 | 5257 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
c0a5d93e BF |
5258 | { |
5259 | struct svc_fh *current_fh = &cstate->current_fh; | |
5260 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
5261 | __be32 status; | |
5262 | ||
c0a5d93e BF |
5263 | status = nfsd4_check_seqid(cstate, sop, seqid); |
5264 | if (status) | |
5265 | return status; | |
9271d7e5 TM |
5266 | status = nfsd4_lock_ol_stateid(stp); |
5267 | if (status != nfs_ok) | |
5268 | return status; | |
f7a4d872 | 5269 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); |
35a92fe8 JL |
5270 | if (status == nfs_ok) |
5271 | status = nfs4_check_fh(current_fh, &stp->st_stid); | |
5272 | if (status != nfs_ok) | |
feb9dad5 | 5273 | mutex_unlock(&stp->st_mutex); |
35a92fe8 | 5274 | return status; |
c0a5d93e BF |
5275 | } |
5276 | ||
1da177e4 LT |
5277 | /* |
5278 | * Checks for sequence id mutating operations. | |
5279 | */ | |
b37ad28b | 5280 | static __be32 |
dd453dfd | 5281 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2288d0e3 | 5282 | stateid_t *stateid, char typemask, |
3320fef1 SK |
5283 | struct nfs4_ol_stateid **stpp, |
5284 | struct nfsd_net *nn) | |
1da177e4 | 5285 | { |
0836f587 | 5286 | __be32 status; |
38c2f4b1 | 5287 | struct nfs4_stid *s; |
e17f99b7 | 5288 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 5289 | |
8c10cbdb BH |
5290 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
5291 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 5292 | |
1da177e4 | 5293 | *stpp = NULL; |
2dd6e458 | 5294 | status = nfsd4_lookup_stateid(cstate, stateid, typemask, &s, nn); |
c0a5d93e BF |
5295 | if (status) |
5296 | return status; | |
e17f99b7 | 5297 | stp = openlockstateid(s); |
58fb12e6 | 5298 | nfsd4_cstate_assign_replay(cstate, stp->st_stateowner); |
1da177e4 | 5299 | |
e17f99b7 | 5300 | status = nfs4_seqid_op_checks(cstate, stateid, seqid, stp); |
fd911011 | 5301 | if (!status) |
e17f99b7 | 5302 | *stpp = stp; |
fd911011 TM |
5303 | else |
5304 | nfs4_put_stid(&stp->st_stid); | |
e17f99b7 | 5305 | return status; |
c0a5d93e | 5306 | } |
39325bd0 | 5307 | |
3320fef1 SK |
5308 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
5309 | stateid_t *stateid, struct nfs4_ol_stateid **stpp, struct nfsd_net *nn) | |
c0a5d93e BF |
5310 | { |
5311 | __be32 status; | |
5312 | struct nfs4_openowner *oo; | |
4cbfc9f7 | 5313 | struct nfs4_ol_stateid *stp; |
1da177e4 | 5314 | |
c0a5d93e | 5315 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
4cbfc9f7 | 5316 | NFS4_OPEN_STID, &stp, nn); |
7a8711c9 BF |
5317 | if (status) |
5318 | return status; | |
4cbfc9f7 TM |
5319 | oo = openowner(stp->st_stateowner); |
5320 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { | |
feb9dad5 | 5321 | mutex_unlock(&stp->st_mutex); |
4cbfc9f7 | 5322 | nfs4_put_stid(&stp->st_stid); |
3a4f98bb | 5323 | return nfserr_bad_stateid; |
4cbfc9f7 TM |
5324 | } |
5325 | *stpp = stp; | |
3a4f98bb | 5326 | return nfs_ok; |
1da177e4 LT |
5327 | } |
5328 | ||
b37ad28b | 5329 | __be32 |
ca364317 | 5330 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 5331 | union nfsd4_op_u *u) |
1da177e4 | 5332 | { |
eb69853d | 5333 | struct nfsd4_open_confirm *oc = &u->open_confirm; |
b37ad28b | 5334 | __be32 status; |
fe0750e5 | 5335 | struct nfs4_openowner *oo; |
dcef0413 | 5336 | struct nfs4_ol_stateid *stp; |
3320fef1 | 5337 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 5338 | |
a6a9f18f AV |
5339 | dprintk("NFSD: nfsd4_open_confirm on file %pd\n", |
5340 | cstate->current_fh.fh_dentry); | |
1da177e4 | 5341 | |
ca364317 | 5342 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
5343 | if (status) |
5344 | return status; | |
1da177e4 | 5345 | |
9072d5c6 | 5346 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 5347 | oc->oc_seqid, &oc->oc_req_stateid, |
3320fef1 | 5348 | NFS4_OPEN_STID, &stp, nn); |
9072d5c6 | 5349 | if (status) |
68b66e82 | 5350 | goto out; |
fe0750e5 | 5351 | oo = openowner(stp->st_stateowner); |
68b66e82 | 5352 | status = nfserr_bad_stateid; |
35a92fe8 | 5353 | if (oo->oo_flags & NFS4_OO_CONFIRMED) { |
feb9dad5 | 5354 | mutex_unlock(&stp->st_mutex); |
2585fc79 | 5355 | goto put_stateid; |
35a92fe8 | 5356 | } |
dad1c067 | 5357 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
9767feb2 | 5358 | nfs4_inc_and_copy_stateid(&oc->oc_resp_stateid, &stp->st_stid); |
feb9dad5 | 5359 | mutex_unlock(&stp->st_mutex); |
8c10cbdb | 5360 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
dcef0413 | 5361 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); |
c7b9a459 | 5362 | |
2a4317c5 | 5363 | nfsd4_client_record_create(oo->oo_owner.so_client); |
68b66e82 | 5364 | status = nfs_ok; |
2585fc79 TM |
5365 | put_stateid: |
5366 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 5367 | out: |
9411b1d4 | 5368 | nfsd4_bump_seqid(cstate, status); |
1da177e4 LT |
5369 | return status; |
5370 | } | |
5371 | ||
6409a5a6 | 5372 | static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) |
1da177e4 | 5373 | { |
82c5ff1b | 5374 | if (!test_access(access, stp)) |
6409a5a6 | 5375 | return; |
11b9164a | 5376 | nfs4_file_put_access(stp->st_stid.sc_file, access); |
82c5ff1b | 5377 | clear_access(access, stp); |
6409a5a6 | 5378 | } |
f197c271 | 5379 | |
6409a5a6 BF |
5380 | static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) |
5381 | { | |
5382 | switch (to_access) { | |
5383 | case NFS4_SHARE_ACCESS_READ: | |
5384 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); | |
5385 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
5386 | break; | |
5387 | case NFS4_SHARE_ACCESS_WRITE: | |
5388 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); | |
5389 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
5390 | break; | |
5391 | case NFS4_SHARE_ACCESS_BOTH: | |
5392 | break; | |
5393 | default: | |
063b0fb9 | 5394 | WARN_ON_ONCE(1); |
1da177e4 LT |
5395 | } |
5396 | } | |
5397 | ||
b37ad28b | 5398 | __be32 |
ca364317 | 5399 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
eb69853d | 5400 | struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) |
1da177e4 | 5401 | { |
eb69853d | 5402 | struct nfsd4_open_downgrade *od = &u->open_downgrade; |
b37ad28b | 5403 | __be32 status; |
dcef0413 | 5404 | struct nfs4_ol_stateid *stp; |
3320fef1 | 5405 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 5406 | |
a6a9f18f AV |
5407 | dprintk("NFSD: nfsd4_open_downgrade on file %pd\n", |
5408 | cstate->current_fh.fh_dentry); | |
1da177e4 | 5409 | |
c30e92df | 5410 | /* We don't yet support WANT bits: */ |
2c8bd7e0 BH |
5411 | if (od->od_deleg_want) |
5412 | dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, | |
5413 | od->od_deleg_want); | |
1da177e4 | 5414 | |
c0a5d93e | 5415 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
3320fef1 | 5416 | &od->od_stateid, &stp, nn); |
9072d5c6 | 5417 | if (status) |
1da177e4 | 5418 | goto out; |
1da177e4 | 5419 | status = nfserr_inval; |
82c5ff1b | 5420 | if (!test_access(od->od_share_access, stp)) { |
c11c591f | 5421 | dprintk("NFSD: access not a subset of current bitmap: 0x%hhx, input access=%08x\n", |
1da177e4 | 5422 | stp->st_access_bmap, od->od_share_access); |
0667b1e9 | 5423 | goto put_stateid; |
1da177e4 | 5424 | } |
ce0fc43c | 5425 | if (!test_deny(od->od_share_deny, stp)) { |
c11c591f | 5426 | dprintk("NFSD: deny not a subset of current bitmap: 0x%hhx, input deny=%08x\n", |
1da177e4 | 5427 | stp->st_deny_bmap, od->od_share_deny); |
0667b1e9 | 5428 | goto put_stateid; |
1da177e4 | 5429 | } |
6409a5a6 | 5430 | nfs4_stateid_downgrade(stp, od->od_share_access); |
ce0fc43c | 5431 | reset_union_bmap_deny(od->od_share_deny, stp); |
9767feb2 | 5432 | nfs4_inc_and_copy_stateid(&od->od_stateid, &stp->st_stid); |
1da177e4 | 5433 | status = nfs_ok; |
0667b1e9 | 5434 | put_stateid: |
feb9dad5 | 5435 | mutex_unlock(&stp->st_mutex); |
0667b1e9 | 5436 | nfs4_put_stid(&stp->st_stid); |
1da177e4 | 5437 | out: |
9411b1d4 | 5438 | nfsd4_bump_seqid(cstate, status); |
1da177e4 LT |
5439 | return status; |
5440 | } | |
5441 | ||
f7a4d872 BF |
5442 | static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) |
5443 | { | |
acf9295b | 5444 | struct nfs4_client *clp = s->st_stid.sc_client; |
e8568739 | 5445 | bool unhashed; |
d83017f9 | 5446 | LIST_HEAD(reaplist); |
acf9295b | 5447 | |
2c41beb0 | 5448 | spin_lock(&clp->cl_lock); |
e8568739 | 5449 | unhashed = unhash_open_stateid(s, &reaplist); |
acf9295b | 5450 | |
d83017f9 | 5451 | if (clp->cl_minorversion) { |
e8568739 JL |
5452 | if (unhashed) |
5453 | put_ol_stateid_locked(s, &reaplist); | |
d83017f9 JL |
5454 | spin_unlock(&clp->cl_lock); |
5455 | free_ol_stateid_reaplist(&reaplist); | |
5456 | } else { | |
5457 | spin_unlock(&clp->cl_lock); | |
5458 | free_ol_stateid_reaplist(&reaplist); | |
e8568739 JL |
5459 | if (unhashed) |
5460 | move_to_close_lru(s, clp->net); | |
d83017f9 | 5461 | } |
38c387b5 BF |
5462 | } |
5463 | ||
1da177e4 LT |
5464 | /* |
5465 | * nfs4_unlock_state() called after encode | |
5466 | */ | |
b37ad28b | 5467 | __be32 |
ca364317 | 5468 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 5469 | union nfsd4_op_u *u) |
1da177e4 | 5470 | { |
eb69853d | 5471 | struct nfsd4_close *close = &u->close; |
b37ad28b | 5472 | __be32 status; |
dcef0413 | 5473 | struct nfs4_ol_stateid *stp; |
3320fef1 SK |
5474 | struct net *net = SVC_NET(rqstp); |
5475 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 | 5476 | |
a6a9f18f AV |
5477 | dprintk("NFSD: nfsd4_close on file %pd\n", |
5478 | cstate->current_fh.fh_dentry); | |
1da177e4 | 5479 | |
f7a4d872 BF |
5480 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
5481 | &close->cl_stateid, | |
5482 | NFS4_OPEN_STID|NFS4_CLOSED_STID, | |
3320fef1 | 5483 | &stp, nn); |
9411b1d4 | 5484 | nfsd4_bump_seqid(cstate, status); |
9072d5c6 | 5485 | if (status) |
1da177e4 | 5486 | goto out; |
15ca08d3 TM |
5487 | |
5488 | stp->st_stid.sc_type = NFS4_CLOSED_STID; | |
bd2decac JL |
5489 | |
5490 | /* | |
5491 | * Technically we don't _really_ have to increment or copy it, since | |
5492 | * it should just be gone after this operation and we clobber the | |
5493 | * copied value below, but we continue to do so here just to ensure | |
5494 | * that racing ops see that there was a state change. | |
5495 | */ | |
9767feb2 | 5496 | nfs4_inc_and_copy_stateid(&close->cl_stateid, &stp->st_stid); |
1da177e4 | 5497 | |
f7a4d872 | 5498 | nfsd4_close_open_stateid(stp); |
15ca08d3 | 5499 | mutex_unlock(&stp->st_mutex); |
8a0b589d | 5500 | |
bd2decac JL |
5501 | /* v4.1+ suggests that we send a special stateid in here, since the |
5502 | * clients should just ignore this anyway. Since this is not useful | |
5503 | * for v4.0 clients either, we set it to the special close_stateid | |
5504 | * universally. | |
5505 | * | |
5506 | * See RFC5661 section 18.2.4, and RFC7530 section 16.2.5 | |
5507 | */ | |
5508 | memcpy(&close->cl_stateid, &close_stateid, sizeof(close->cl_stateid)); | |
fb500a7c | 5509 | |
8a0b589d TM |
5510 | /* put reference from nfs4_preprocess_seqid_op */ |
5511 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 5512 | out: |
1da177e4 LT |
5513 | return status; |
5514 | } | |
5515 | ||
b37ad28b | 5516 | __be32 |
ca364317 | 5517 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 5518 | union nfsd4_op_u *u) |
1da177e4 | 5519 | { |
eb69853d | 5520 | struct nfsd4_delegreturn *dr = &u->delegreturn; |
203a8c8e BF |
5521 | struct nfs4_delegation *dp; |
5522 | stateid_t *stateid = &dr->dr_stateid; | |
38c2f4b1 | 5523 | struct nfs4_stid *s; |
b37ad28b | 5524 | __be32 status; |
3320fef1 | 5525 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 5526 | |
ca364317 | 5527 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e | 5528 | return status; |
1da177e4 | 5529 | |
2dd6e458 | 5530 | status = nfsd4_lookup_stateid(cstate, stateid, NFS4_DELEG_STID, &s, nn); |
38c2f4b1 | 5531 | if (status) |
203a8c8e | 5532 | goto out; |
38c2f4b1 | 5533 | dp = delegstateid(s); |
03da3169 | 5534 | status = nfsd4_stid_check_stateid_generation(stateid, &dp->dl_stid, nfsd4_has_session(cstate)); |
203a8c8e | 5535 | if (status) |
fd911011 | 5536 | goto put_stateid; |
203a8c8e | 5537 | |
3bd64a5b | 5538 | destroy_delegation(dp); |
fd911011 TM |
5539 | put_stateid: |
5540 | nfs4_put_stid(&dp->dl_stid); | |
1da177e4 LT |
5541 | out: |
5542 | return status; | |
5543 | } | |
5544 | ||
87df4de8 BH |
5545 | static inline u64 |
5546 | end_offset(u64 start, u64 len) | |
5547 | { | |
5548 | u64 end; | |
5549 | ||
5550 | end = start + len; | |
5551 | return end >= start ? end: NFS4_MAX_UINT64; | |
5552 | } | |
5553 | ||
5554 | /* last octet in a range */ | |
5555 | static inline u64 | |
5556 | last_byte_offset(u64 start, u64 len) | |
5557 | { | |
5558 | u64 end; | |
5559 | ||
063b0fb9 | 5560 | WARN_ON_ONCE(!len); |
87df4de8 BH |
5561 | end = start + len; |
5562 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
5563 | } | |
5564 | ||
1da177e4 LT |
5565 | /* |
5566 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
5567 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
5568 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
5569 | * locking, this prevents us from being completely protocol-compliant. The | |
5570 | * real solution to this problem is to start using unsigned file offsets in | |
5571 | * the VFS, but this is a very deep change! | |
5572 | */ | |
5573 | static inline void | |
5574 | nfs4_transform_lock_offset(struct file_lock *lock) | |
5575 | { | |
5576 | if (lock->fl_start < 0) | |
5577 | lock->fl_start = OFFSET_MAX; | |
5578 | if (lock->fl_end < 0) | |
5579 | lock->fl_end = OFFSET_MAX; | |
5580 | } | |
5581 | ||
cae80b30 JL |
5582 | static fl_owner_t |
5583 | nfsd4_fl_get_owner(fl_owner_t owner) | |
aef9583b | 5584 | { |
cae80b30 JL |
5585 | struct nfs4_lockowner *lo = (struct nfs4_lockowner *)owner; |
5586 | ||
5587 | nfs4_get_stateowner(&lo->lo_owner); | |
5588 | return owner; | |
aef9583b KM |
5589 | } |
5590 | ||
cae80b30 JL |
5591 | static void |
5592 | nfsd4_fl_put_owner(fl_owner_t owner) | |
aef9583b | 5593 | { |
cae80b30 | 5594 | struct nfs4_lockowner *lo = (struct nfs4_lockowner *)owner; |
aef9583b | 5595 | |
cae80b30 | 5596 | if (lo) |
aef9583b | 5597 | nfs4_put_stateowner(&lo->lo_owner); |
aef9583b KM |
5598 | } |
5599 | ||
76d348fa JL |
5600 | static void |
5601 | nfsd4_lm_notify(struct file_lock *fl) | |
5602 | { | |
5603 | struct nfs4_lockowner *lo = (struct nfs4_lockowner *)fl->fl_owner; | |
5604 | struct net *net = lo->lo_owner.so_client->net; | |
5605 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
5606 | struct nfsd4_blocked_lock *nbl = container_of(fl, | |
5607 | struct nfsd4_blocked_lock, nbl_lock); | |
5608 | bool queue = false; | |
5609 | ||
7919d0a2 | 5610 | /* An empty list means that something else is going to be using it */ |
0cc11a61 | 5611 | spin_lock(&nn->blocked_locks_lock); |
76d348fa JL |
5612 | if (!list_empty(&nbl->nbl_list)) { |
5613 | list_del_init(&nbl->nbl_list); | |
7919d0a2 | 5614 | list_del_init(&nbl->nbl_lru); |
76d348fa JL |
5615 | queue = true; |
5616 | } | |
0cc11a61 | 5617 | spin_unlock(&nn->blocked_locks_lock); |
76d348fa JL |
5618 | |
5619 | if (queue) | |
5620 | nfsd4_run_cb(&nbl->nbl_cb); | |
5621 | } | |
5622 | ||
7b021967 | 5623 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
76d348fa | 5624 | .lm_notify = nfsd4_lm_notify, |
aef9583b KM |
5625 | .lm_get_owner = nfsd4_fl_get_owner, |
5626 | .lm_put_owner = nfsd4_fl_put_owner, | |
d5b9026a | 5627 | }; |
1da177e4 LT |
5628 | |
5629 | static inline void | |
5630 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
5631 | { | |
fe0750e5 | 5632 | struct nfs4_lockowner *lo; |
1da177e4 | 5633 | |
d5b9026a | 5634 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 BF |
5635 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
5636 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, | |
5637 | lo->lo_owner.so_owner.len, GFP_KERNEL); | |
7c13f344 BF |
5638 | if (!deny->ld_owner.data) |
5639 | /* We just don't care that much */ | |
5640 | goto nevermind; | |
fe0750e5 BF |
5641 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
5642 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; | |
d5b9026a | 5643 | } else { |
7c13f344 BF |
5644 | nevermind: |
5645 | deny->ld_owner.len = 0; | |
5646 | deny->ld_owner.data = NULL; | |
d5b9026a N |
5647 | deny->ld_clientid.cl_boot = 0; |
5648 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
5649 | } |
5650 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
5651 | deny->ld_length = NFS4_MAX_UINT64; |
5652 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
5653 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
5654 | deny->ld_type = NFS4_READ_LT; | |
5655 | if (fl->fl_type != F_RDLCK) | |
5656 | deny->ld_type = NFS4_WRITE_LT; | |
5657 | } | |
5658 | ||
fe0750e5 | 5659 | static struct nfs4_lockowner * |
c8623999 | 5660 | find_lockowner_str_locked(struct nfs4_client *clp, struct xdr_netobj *owner) |
1da177e4 | 5661 | { |
d4f0489f | 5662 | unsigned int strhashval = ownerstr_hashval(owner); |
b3c32bcd | 5663 | struct nfs4_stateowner *so; |
1da177e4 | 5664 | |
0a880a28 TM |
5665 | lockdep_assert_held(&clp->cl_lock); |
5666 | ||
d4f0489f TM |
5667 | list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[strhashval], |
5668 | so_strhash) { | |
b3c32bcd TM |
5669 | if (so->so_is_open_owner) |
5670 | continue; | |
b5971afa KM |
5671 | if (same_owner_str(so, owner)) |
5672 | return lockowner(nfs4_get_stateowner(so)); | |
1da177e4 LT |
5673 | } |
5674 | return NULL; | |
5675 | } | |
5676 | ||
c58c6610 | 5677 | static struct nfs4_lockowner * |
c8623999 | 5678 | find_lockowner_str(struct nfs4_client *clp, struct xdr_netobj *owner) |
c58c6610 TM |
5679 | { |
5680 | struct nfs4_lockowner *lo; | |
5681 | ||
d4f0489f | 5682 | spin_lock(&clp->cl_lock); |
c8623999 | 5683 | lo = find_lockowner_str_locked(clp, owner); |
d4f0489f | 5684 | spin_unlock(&clp->cl_lock); |
c58c6610 TM |
5685 | return lo; |
5686 | } | |
5687 | ||
8f4b54c5 JL |
5688 | static void nfs4_unhash_lockowner(struct nfs4_stateowner *sop) |
5689 | { | |
c58c6610 | 5690 | unhash_lockowner_locked(lockowner(sop)); |
8f4b54c5 JL |
5691 | } |
5692 | ||
6b180f0b JL |
5693 | static void nfs4_free_lockowner(struct nfs4_stateowner *sop) |
5694 | { | |
5695 | struct nfs4_lockowner *lo = lockowner(sop); | |
5696 | ||
5697 | kmem_cache_free(lockowner_slab, lo); | |
5698 | } | |
5699 | ||
5700 | static const struct nfs4_stateowner_operations lockowner_ops = { | |
8f4b54c5 JL |
5701 | .so_unhash = nfs4_unhash_lockowner, |
5702 | .so_free = nfs4_free_lockowner, | |
6b180f0b JL |
5703 | }; |
5704 | ||
1da177e4 LT |
5705 | /* |
5706 | * Alloc a lock owner structure. | |
5707 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 5708 | * occurred. |
1da177e4 | 5709 | * |
16bfdaaf | 5710 | * strhashval = ownerstr_hashval |
1da177e4 | 5711 | */ |
fe0750e5 | 5712 | static struct nfs4_lockowner * |
c58c6610 TM |
5713 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, |
5714 | struct nfs4_ol_stateid *open_stp, | |
5715 | struct nfsd4_lock *lock) | |
5716 | { | |
c58c6610 | 5717 | struct nfs4_lockowner *lo, *ret; |
1da177e4 | 5718 | |
fe0750e5 BF |
5719 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
5720 | if (!lo) | |
1da177e4 | 5721 | return NULL; |
76d348fa | 5722 | INIT_LIST_HEAD(&lo->lo_blocked); |
fe0750e5 BF |
5723 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
5724 | lo->lo_owner.so_is_open_owner = 0; | |
5db1c03f | 5725 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid; |
6b180f0b | 5726 | lo->lo_owner.so_ops = &lockowner_ops; |
d4f0489f | 5727 | spin_lock(&clp->cl_lock); |
c8623999 | 5728 | ret = find_lockowner_str_locked(clp, &lock->lk_new_owner); |
c58c6610 TM |
5729 | if (ret == NULL) { |
5730 | list_add(&lo->lo_owner.so_strhash, | |
d4f0489f | 5731 | &clp->cl_ownerstr_hashtbl[strhashval]); |
c58c6610 TM |
5732 | ret = lo; |
5733 | } else | |
d50ffded KM |
5734 | nfs4_free_stateowner(&lo->lo_owner); |
5735 | ||
d4f0489f | 5736 | spin_unlock(&clp->cl_lock); |
340f0ba1 | 5737 | return ret; |
1da177e4 LT |
5738 | } |
5739 | ||
fd1fd685 TM |
5740 | static struct nfs4_ol_stateid * |
5741 | find_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp) | |
5742 | { | |
5743 | struct nfs4_ol_stateid *lst; | |
5744 | struct nfs4_client *clp = lo->lo_owner.so_client; | |
5745 | ||
5746 | lockdep_assert_held(&clp->cl_lock); | |
5747 | ||
5748 | list_for_each_entry(lst, &lo->lo_owner.so_stateids, st_perstateowner) { | |
5749 | if (lst->st_stid.sc_type != NFS4_LOCK_STID) | |
5750 | continue; | |
5751 | if (lst->st_stid.sc_file == fp) { | |
5752 | refcount_inc(&lst->st_stid.sc_count); | |
5753 | return lst; | |
5754 | } | |
5755 | } | |
5756 | return NULL; | |
5757 | } | |
5758 | ||
beeca19c | 5759 | static struct nfs4_ol_stateid * |
356a95ec JL |
5760 | init_lock_stateid(struct nfs4_ol_stateid *stp, struct nfs4_lockowner *lo, |
5761 | struct nfs4_file *fp, struct inode *inode, | |
5762 | struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 5763 | { |
d3b313a4 | 5764 | struct nfs4_client *clp = lo->lo_owner.so_client; |
beeca19c | 5765 | struct nfs4_ol_stateid *retstp; |
1da177e4 | 5766 | |
beeca19c | 5767 | mutex_init(&stp->st_mutex); |
4f34bd05 | 5768 | mutex_lock_nested(&stp->st_mutex, OPEN_STATEID_MUTEX); |
beeca19c TM |
5769 | retry: |
5770 | spin_lock(&clp->cl_lock); | |
5771 | spin_lock(&fp->fi_lock); | |
5772 | retstp = find_lock_stateid(lo, fp); | |
5773 | if (retstp) | |
5774 | goto out_unlock; | |
356a95ec | 5775 | |
a15dfcd5 | 5776 | refcount_inc(&stp->st_stid.sc_count); |
3abdb607 | 5777 | stp->st_stid.sc_type = NFS4_LOCK_STID; |
b5971afa | 5778 | stp->st_stateowner = nfs4_get_stateowner(&lo->lo_owner); |
13cd2184 | 5779 | get_nfs4_file(fp); |
11b9164a | 5780 | stp->st_stid.sc_file = fp; |
0997b173 | 5781 | stp->st_access_bmap = 0; |
1da177e4 | 5782 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 5783 | stp->st_openstp = open_stp; |
3c87b9b7 | 5784 | list_add(&stp->st_locks, &open_stp->st_locks); |
1c755dc1 | 5785 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
1d31a253 | 5786 | list_add(&stp->st_perfile, &fp->fi_stateids); |
beeca19c | 5787 | out_unlock: |
1d31a253 | 5788 | spin_unlock(&fp->fi_lock); |
beeca19c TM |
5789 | spin_unlock(&clp->cl_lock); |
5790 | if (retstp) { | |
5791 | if (nfsd4_lock_ol_stateid(retstp) != nfs_ok) { | |
5792 | nfs4_put_stid(&retstp->st_stid); | |
5793 | goto retry; | |
5794 | } | |
5795 | /* To keep mutex tracking happy */ | |
5796 | mutex_unlock(&stp->st_mutex); | |
5797 | stp = retstp; | |
5798 | } | |
5799 | return stp; | |
1da177e4 LT |
5800 | } |
5801 | ||
356a95ec JL |
5802 | static struct nfs4_ol_stateid * |
5803 | find_or_create_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fi, | |
5804 | struct inode *inode, struct nfs4_ol_stateid *ost, | |
5805 | bool *new) | |
5806 | { | |
5807 | struct nfs4_stid *ns = NULL; | |
5808 | struct nfs4_ol_stateid *lst; | |
5809 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); | |
5810 | struct nfs4_client *clp = oo->oo_owner.so_client; | |
5811 | ||
beeca19c | 5812 | *new = false; |
356a95ec JL |
5813 | spin_lock(&clp->cl_lock); |
5814 | lst = find_lock_stateid(lo, fi); | |
356a95ec | 5815 | spin_unlock(&clp->cl_lock); |
beeca19c TM |
5816 | if (lst != NULL) { |
5817 | if (nfsd4_lock_ol_stateid(lst) == nfs_ok) | |
5818 | goto out; | |
5819 | nfs4_put_stid(&lst->st_stid); | |
5820 | } | |
5821 | ns = nfs4_alloc_stid(clp, stateid_slab, nfs4_free_lock_stateid); | |
5822 | if (ns == NULL) | |
5823 | return NULL; | |
5824 | ||
5825 | lst = init_lock_stateid(openlockstateid(ns), lo, fi, inode, ost); | |
5826 | if (lst == openlockstateid(ns)) | |
5827 | *new = true; | |
5828 | else | |
356a95ec | 5829 | nfs4_put_stid(ns); |
beeca19c | 5830 | out: |
356a95ec JL |
5831 | return lst; |
5832 | } | |
c53530da | 5833 | |
fd39ca9a | 5834 | static int |
1da177e4 LT |
5835 | check_lock_length(u64 offset, u64 length) |
5836 | { | |
e7969315 KM |
5837 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
5838 | (length > ~offset))); | |
1da177e4 LT |
5839 | } |
5840 | ||
dcef0413 | 5841 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 | 5842 | { |
11b9164a | 5843 | struct nfs4_file *fp = lock_stp->st_stid.sc_file; |
0997b173 | 5844 | |
7214e860 JL |
5845 | lockdep_assert_held(&fp->fi_lock); |
5846 | ||
82c5ff1b | 5847 | if (test_access(access, lock_stp)) |
0997b173 | 5848 | return; |
12659651 | 5849 | __nfs4_file_get_access(fp, access); |
82c5ff1b | 5850 | set_access(access, lock_stp); |
0997b173 BF |
5851 | } |
5852 | ||
356a95ec JL |
5853 | static __be32 |
5854 | lookup_or_create_lock_state(struct nfsd4_compound_state *cstate, | |
5855 | struct nfs4_ol_stateid *ost, | |
5856 | struct nfsd4_lock *lock, | |
dd257933 | 5857 | struct nfs4_ol_stateid **plst, bool *new) |
64a284d0 | 5858 | { |
5db1c03f | 5859 | __be32 status; |
11b9164a | 5860 | struct nfs4_file *fi = ost->st_stid.sc_file; |
64a284d0 BF |
5861 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); |
5862 | struct nfs4_client *cl = oo->oo_owner.so_client; | |
2b0143b5 | 5863 | struct inode *inode = d_inode(cstate->current_fh.fh_dentry); |
64a284d0 | 5864 | struct nfs4_lockowner *lo; |
dd257933 | 5865 | struct nfs4_ol_stateid *lst; |
64a284d0 BF |
5866 | unsigned int strhashval; |
5867 | ||
c8623999 | 5868 | lo = find_lockowner_str(cl, &lock->lk_new_owner); |
c53530da | 5869 | if (!lo) { |
76f6c9e1 | 5870 | strhashval = ownerstr_hashval(&lock->lk_new_owner); |
c53530da JL |
5871 | lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); |
5872 | if (lo == NULL) | |
5873 | return nfserr_jukebox; | |
5874 | } else { | |
5875 | /* with an existing lockowner, seqids must be the same */ | |
5db1c03f | 5876 | status = nfserr_bad_seqid; |
c53530da JL |
5877 | if (!cstate->minorversion && |
5878 | lock->lk_new_lock_seqid != lo->lo_owner.so_seqid) | |
5db1c03f | 5879 | goto out; |
64a284d0 | 5880 | } |
c53530da | 5881 | |
dd257933 JL |
5882 | lst = find_or_create_lock_stateid(lo, fi, inode, ost, new); |
5883 | if (lst == NULL) { | |
5db1c03f JL |
5884 | status = nfserr_jukebox; |
5885 | goto out; | |
64a284d0 | 5886 | } |
dd257933 | 5887 | |
5db1c03f | 5888 | status = nfs_ok; |
dd257933 | 5889 | *plst = lst; |
5db1c03f JL |
5890 | out: |
5891 | nfs4_put_stateowner(&lo->lo_owner); | |
5892 | return status; | |
64a284d0 BF |
5893 | } |
5894 | ||
1da177e4 LT |
5895 | /* |
5896 | * LOCK operation | |
5897 | */ | |
b37ad28b | 5898 | __be32 |
ca364317 | 5899 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 5900 | union nfsd4_op_u *u) |
1da177e4 | 5901 | { |
eb69853d | 5902 | struct nfsd4_lock *lock = &u->lock; |
fe0750e5 BF |
5903 | struct nfs4_openowner *open_sop = NULL; |
5904 | struct nfs4_lockowner *lock_sop = NULL; | |
3d0fabd5 | 5905 | struct nfs4_ol_stateid *lock_stp = NULL; |
0667b1e9 | 5906 | struct nfs4_ol_stateid *open_stp = NULL; |
7214e860 | 5907 | struct nfs4_file *fp; |
7d947842 | 5908 | struct file *filp = NULL; |
76d348fa | 5909 | struct nfsd4_blocked_lock *nbl = NULL; |
21179d81 JL |
5910 | struct file_lock *file_lock = NULL; |
5911 | struct file_lock *conflock = NULL; | |
b37ad28b | 5912 | __be32 status = 0; |
b34f27aa | 5913 | int lkflg; |
b8dd7b9a | 5914 | int err; |
5db1c03f | 5915 | bool new = false; |
76d348fa JL |
5916 | unsigned char fl_type; |
5917 | unsigned int fl_flags = FL_POSIX; | |
3320fef1 SK |
5918 | struct net *net = SVC_NET(rqstp); |
5919 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 LT |
5920 | |
5921 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
5922 | (long long) lock->lk_offset, | |
5923 | (long long) lock->lk_length); | |
5924 | ||
1da177e4 LT |
5925 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
5926 | return nfserr_inval; | |
5927 | ||
ca364317 | 5928 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 5929 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
5930 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
5931 | return status; | |
5932 | } | |
5933 | ||
1da177e4 | 5934 | if (lock->lk_is_new) { |
684e5638 BF |
5935 | if (nfsd4_has_session(cstate)) |
5936 | /* See rfc 5661 18.10.3: given clientid is ignored: */ | |
76f6c9e1 | 5937 | memcpy(&lock->lk_new_clientid, |
684e5638 BF |
5938 | &cstate->session->se_client->cl_clientid, |
5939 | sizeof(clientid_t)); | |
5940 | ||
1da177e4 | 5941 | status = nfserr_stale_clientid; |
2c142baa | 5942 | if (STALE_CLIENTID(&lock->lk_new_clientid, nn)) |
1da177e4 | 5943 | goto out; |
1da177e4 | 5944 | |
1da177e4 | 5945 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 5946 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
5947 | lock->lk_new_open_seqid, |
5948 | &lock->lk_new_open_stateid, | |
3320fef1 | 5949 | &open_stp, nn); |
37515177 | 5950 | if (status) |
1da177e4 | 5951 | goto out; |
feb9dad5 | 5952 | mutex_unlock(&open_stp->st_mutex); |
fe0750e5 | 5953 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 5954 | status = nfserr_bad_stateid; |
684e5638 | 5955 | if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
76f6c9e1 | 5956 | &lock->lk_new_clientid)) |
b34f27aa | 5957 | goto out; |
64a284d0 | 5958 | status = lookup_or_create_lock_state(cstate, open_stp, lock, |
5db1c03f | 5959 | &lock_stp, &new); |
3d0fabd5 | 5960 | } else { |
dd453dfd | 5961 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
5962 | lock->lk_old_lock_seqid, |
5963 | &lock->lk_old_lock_stateid, | |
3320fef1 | 5964 | NFS4_LOCK_STID, &lock_stp, nn); |
3d0fabd5 | 5965 | } |
e1aaa891 BF |
5966 | if (status) |
5967 | goto out; | |
64a284d0 | 5968 | lock_sop = lockowner(lock_stp->st_stateowner); |
1da177e4 | 5969 | |
b34f27aa BF |
5970 | lkflg = setlkflg(lock->lk_type); |
5971 | status = nfs4_check_openmode(lock_stp, lkflg); | |
5972 | if (status) | |
5973 | goto out; | |
5974 | ||
0dd395dc | 5975 | status = nfserr_grace; |
3320fef1 | 5976 | if (locks_in_grace(net) && !lock->lk_reclaim) |
0dd395dc N |
5977 | goto out; |
5978 | status = nfserr_no_grace; | |
3320fef1 | 5979 | if (!locks_in_grace(net) && lock->lk_reclaim) |
0dd395dc N |
5980 | goto out; |
5981 | ||
11b9164a | 5982 | fp = lock_stp->st_stid.sc_file; |
1da177e4 | 5983 | switch (lock->lk_type) { |
1da177e4 | 5984 | case NFS4_READW_LT: |
76d348fa JL |
5985 | if (nfsd4_has_session(cstate)) |
5986 | fl_flags |= FL_SLEEP; | |
5987 | /* Fallthrough */ | |
5988 | case NFS4_READ_LT: | |
7214e860 JL |
5989 | spin_lock(&fp->fi_lock); |
5990 | filp = find_readable_file_locked(fp); | |
0997b173 BF |
5991 | if (filp) |
5992 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
7214e860 | 5993 | spin_unlock(&fp->fi_lock); |
76d348fa | 5994 | fl_type = F_RDLCK; |
529d7b2a | 5995 | break; |
1da177e4 | 5996 | case NFS4_WRITEW_LT: |
76d348fa JL |
5997 | if (nfsd4_has_session(cstate)) |
5998 | fl_flags |= FL_SLEEP; | |
5999 | /* Fallthrough */ | |
6000 | case NFS4_WRITE_LT: | |
7214e860 JL |
6001 | spin_lock(&fp->fi_lock); |
6002 | filp = find_writeable_file_locked(fp); | |
0997b173 BF |
6003 | if (filp) |
6004 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
7214e860 | 6005 | spin_unlock(&fp->fi_lock); |
76d348fa | 6006 | fl_type = F_WRLCK; |
529d7b2a | 6007 | break; |
1da177e4 LT |
6008 | default: |
6009 | status = nfserr_inval; | |
6010 | goto out; | |
6011 | } | |
76d348fa | 6012 | |
f9d7562f BF |
6013 | if (!filp) { |
6014 | status = nfserr_openmode; | |
6015 | goto out; | |
6016 | } | |
aef9583b | 6017 | |
76d348fa JL |
6018 | nbl = find_or_allocate_block(lock_sop, &fp->fi_fhandle, nn); |
6019 | if (!nbl) { | |
6020 | dprintk("NFSD: %s: unable to allocate block!\n", __func__); | |
6021 | status = nfserr_jukebox; | |
6022 | goto out; | |
6023 | } | |
6024 | ||
6025 | file_lock = &nbl->nbl_lock; | |
6026 | file_lock->fl_type = fl_type; | |
aef9583b | 6027 | file_lock->fl_owner = (fl_owner_t)lockowner(nfs4_get_stateowner(&lock_sop->lo_owner)); |
21179d81 JL |
6028 | file_lock->fl_pid = current->tgid; |
6029 | file_lock->fl_file = filp; | |
76d348fa | 6030 | file_lock->fl_flags = fl_flags; |
21179d81 JL |
6031 | file_lock->fl_lmops = &nfsd_posix_mng_ops; |
6032 | file_lock->fl_start = lock->lk_offset; | |
6033 | file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); | |
6034 | nfs4_transform_lock_offset(file_lock); | |
6035 | ||
6036 | conflock = locks_alloc_lock(); | |
6037 | if (!conflock) { | |
6038 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
6039 | status = nfserr_jukebox; | |
6040 | goto out; | |
6041 | } | |
1da177e4 | 6042 | |
76d348fa | 6043 | if (fl_flags & FL_SLEEP) { |
7919d0a2 | 6044 | nbl->nbl_time = jiffies; |
0cc11a61 | 6045 | spin_lock(&nn->blocked_locks_lock); |
76d348fa | 6046 | list_add_tail(&nbl->nbl_list, &lock_sop->lo_blocked); |
7919d0a2 | 6047 | list_add_tail(&nbl->nbl_lru, &nn->blocked_locks_lru); |
0cc11a61 | 6048 | spin_unlock(&nn->blocked_locks_lock); |
76d348fa JL |
6049 | } |
6050 | ||
21179d81 | 6051 | err = vfs_lock_file(filp, F_SETLK, file_lock, conflock); |
76d348fa | 6052 | switch (err) { |
1da177e4 | 6053 | case 0: /* success! */ |
9767feb2 | 6054 | nfs4_inc_and_copy_stateid(&lock->lk_resp_stateid, &lock_stp->st_stid); |
b8dd7b9a | 6055 | status = 0; |
eb76b3fd | 6056 | break; |
76d348fa JL |
6057 | case FILE_LOCK_DEFERRED: |
6058 | nbl = NULL; | |
6059 | /* Fallthrough */ | |
6060 | case -EAGAIN: /* conflock holds conflicting lock */ | |
eb76b3fd AA |
6061 | status = nfserr_denied; |
6062 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
21179d81 | 6063 | nfs4_set_lock_denied(conflock, &lock->lk_denied); |
eb76b3fd | 6064 | break; |
76d348fa | 6065 | case -EDEADLK: |
1da177e4 | 6066 | status = nfserr_deadlock; |
eb76b3fd | 6067 | break; |
3e772463 | 6068 | default: |
fd85b817 | 6069 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 6070 | status = nfserrno(err); |
eb76b3fd | 6071 | break; |
1da177e4 | 6072 | } |
1da177e4 | 6073 | out: |
76d348fa JL |
6074 | if (nbl) { |
6075 | /* dequeue it if we queued it before */ | |
6076 | if (fl_flags & FL_SLEEP) { | |
0cc11a61 | 6077 | spin_lock(&nn->blocked_locks_lock); |
76d348fa | 6078 | list_del_init(&nbl->nbl_list); |
7919d0a2 | 6079 | list_del_init(&nbl->nbl_lru); |
0cc11a61 | 6080 | spin_unlock(&nn->blocked_locks_lock); |
76d348fa JL |
6081 | } |
6082 | free_blocked_lock(nbl); | |
6083 | } | |
de18643d TM |
6084 | if (filp) |
6085 | fput(filp); | |
5db1c03f JL |
6086 | if (lock_stp) { |
6087 | /* Bump seqid manually if the 4.0 replay owner is openowner */ | |
6088 | if (cstate->replay_owner && | |
6089 | cstate->replay_owner != &lock_sop->lo_owner && | |
6090 | seqid_mutating_err(ntohl(status))) | |
6091 | lock_sop->lo_owner.so_seqid++; | |
6092 | ||
6093 | /* | |
6094 | * If this is a new, never-before-used stateid, and we are | |
6095 | * returning an error, then just go ahead and release it. | |
6096 | */ | |
25020720 | 6097 | if (status && new) |
5db1c03f | 6098 | release_lock_stateid(lock_stp); |
beeca19c TM |
6099 | |
6100 | mutex_unlock(&lock_stp->st_mutex); | |
5db1c03f | 6101 | |
3d0fabd5 | 6102 | nfs4_put_stid(&lock_stp->st_stid); |
5db1c03f | 6103 | } |
0667b1e9 TM |
6104 | if (open_stp) |
6105 | nfs4_put_stid(&open_stp->st_stid); | |
9411b1d4 | 6106 | nfsd4_bump_seqid(cstate, status); |
21179d81 JL |
6107 | if (conflock) |
6108 | locks_free_lock(conflock); | |
1da177e4 LT |
6109 | return status; |
6110 | } | |
6111 | ||
55ef1274 BF |
6112 | /* |
6113 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
6114 | * so we do a temporary open here just to get an open file to pass to | |
6115 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
6116 | * inode operation.) | |
6117 | */ | |
04da6e9d | 6118 | static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) |
55ef1274 BF |
6119 | { |
6120 | struct file *file; | |
04da6e9d AV |
6121 | __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); |
6122 | if (!err) { | |
6123 | err = nfserrno(vfs_test_lock(file, lock)); | |
fd891454 | 6124 | fput(file); |
04da6e9d | 6125 | } |
55ef1274 BF |
6126 | return err; |
6127 | } | |
6128 | ||
1da177e4 LT |
6129 | /* |
6130 | * LOCKT operation | |
6131 | */ | |
b37ad28b | 6132 | __be32 |
ca364317 | 6133 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 6134 | union nfsd4_op_u *u) |
1da177e4 | 6135 | { |
eb69853d | 6136 | struct nfsd4_lockt *lockt = &u->lockt; |
21179d81 | 6137 | struct file_lock *file_lock = NULL; |
5db1c03f | 6138 | struct nfs4_lockowner *lo = NULL; |
b37ad28b | 6139 | __be32 status; |
7f2210fa | 6140 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 6141 | |
5ccb0066 | 6142 | if (locks_in_grace(SVC_NET(rqstp))) |
1da177e4 LT |
6143 | return nfserr_grace; |
6144 | ||
6145 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
6146 | return nfserr_inval; | |
6147 | ||
9b2ef62b | 6148 | if (!nfsd4_has_session(cstate)) { |
4b24ca7d | 6149 | status = lookup_clientid(&lockt->lt_clientid, cstate, nn); |
9b2ef62b BF |
6150 | if (status) |
6151 | goto out; | |
6152 | } | |
1da177e4 | 6153 | |
75c096f7 | 6154 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 6155 | goto out; |
1da177e4 | 6156 | |
21179d81 JL |
6157 | file_lock = locks_alloc_lock(); |
6158 | if (!file_lock) { | |
6159 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
6160 | status = nfserr_jukebox; | |
6161 | goto out; | |
6162 | } | |
6cd90662 | 6163 | |
1da177e4 LT |
6164 | switch (lockt->lt_type) { |
6165 | case NFS4_READ_LT: | |
6166 | case NFS4_READW_LT: | |
21179d81 | 6167 | file_lock->fl_type = F_RDLCK; |
1da177e4 LT |
6168 | break; |
6169 | case NFS4_WRITE_LT: | |
6170 | case NFS4_WRITEW_LT: | |
21179d81 | 6171 | file_lock->fl_type = F_WRLCK; |
1da177e4 LT |
6172 | break; |
6173 | default: | |
2fdada03 | 6174 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
6175 | status = nfserr_inval; |
6176 | goto out; | |
6177 | } | |
6178 | ||
c8623999 | 6179 | lo = find_lockowner_str(cstate->clp, &lockt->lt_owner); |
fe0750e5 | 6180 | if (lo) |
21179d81 JL |
6181 | file_lock->fl_owner = (fl_owner_t)lo; |
6182 | file_lock->fl_pid = current->tgid; | |
6183 | file_lock->fl_flags = FL_POSIX; | |
1da177e4 | 6184 | |
21179d81 JL |
6185 | file_lock->fl_start = lockt->lt_offset; |
6186 | file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); | |
1da177e4 | 6187 | |
21179d81 | 6188 | nfs4_transform_lock_offset(file_lock); |
1da177e4 | 6189 | |
21179d81 | 6190 | status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock); |
04da6e9d | 6191 | if (status) |
fd85b817 | 6192 | goto out; |
04da6e9d | 6193 | |
21179d81 | 6194 | if (file_lock->fl_type != F_UNLCK) { |
1da177e4 | 6195 | status = nfserr_denied; |
21179d81 | 6196 | nfs4_set_lock_denied(file_lock, &lockt->lt_denied); |
1da177e4 LT |
6197 | } |
6198 | out: | |
5db1c03f JL |
6199 | if (lo) |
6200 | nfs4_put_stateowner(&lo->lo_owner); | |
21179d81 JL |
6201 | if (file_lock) |
6202 | locks_free_lock(file_lock); | |
1da177e4 LT |
6203 | return status; |
6204 | } | |
6205 | ||
b37ad28b | 6206 | __be32 |
ca364317 | 6207 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 6208 | union nfsd4_op_u *u) |
1da177e4 | 6209 | { |
eb69853d | 6210 | struct nfsd4_locku *locku = &u->locku; |
dcef0413 | 6211 | struct nfs4_ol_stateid *stp; |
1da177e4 | 6212 | struct file *filp = NULL; |
21179d81 | 6213 | struct file_lock *file_lock = NULL; |
b37ad28b | 6214 | __be32 status; |
b8dd7b9a | 6215 | int err; |
3320fef1 SK |
6216 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
6217 | ||
1da177e4 LT |
6218 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", |
6219 | (long long) locku->lu_offset, | |
6220 | (long long) locku->lu_length); | |
6221 | ||
6222 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
6223 | return nfserr_inval; | |
6224 | ||
9072d5c6 | 6225 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
3320fef1 SK |
6226 | &locku->lu_stateid, NFS4_LOCK_STID, |
6227 | &stp, nn); | |
9072d5c6 | 6228 | if (status) |
1da177e4 | 6229 | goto out; |
11b9164a | 6230 | filp = find_any_file(stp->st_stid.sc_file); |
f9d7562f BF |
6231 | if (!filp) { |
6232 | status = nfserr_lock_range; | |
858cc573 | 6233 | goto put_stateid; |
f9d7562f | 6234 | } |
21179d81 JL |
6235 | file_lock = locks_alloc_lock(); |
6236 | if (!file_lock) { | |
6237 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
6238 | status = nfserr_jukebox; | |
de18643d | 6239 | goto fput; |
21179d81 | 6240 | } |
6cd90662 | 6241 | |
21179d81 | 6242 | file_lock->fl_type = F_UNLCK; |
aef9583b | 6243 | file_lock->fl_owner = (fl_owner_t)lockowner(nfs4_get_stateowner(stp->st_stateowner)); |
21179d81 JL |
6244 | file_lock->fl_pid = current->tgid; |
6245 | file_lock->fl_file = filp; | |
6246 | file_lock->fl_flags = FL_POSIX; | |
6247 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
6248 | file_lock->fl_start = locku->lu_offset; | |
6249 | ||
6250 | file_lock->fl_end = last_byte_offset(locku->lu_offset, | |
6251 | locku->lu_length); | |
6252 | nfs4_transform_lock_offset(file_lock); | |
1da177e4 | 6253 | |
21179d81 | 6254 | err = vfs_lock_file(filp, F_SETLK, file_lock, NULL); |
b8dd7b9a | 6255 | if (err) { |
fd85b817 | 6256 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
6257 | goto out_nfserr; |
6258 | } | |
9767feb2 | 6259 | nfs4_inc_and_copy_stateid(&locku->lu_stateid, &stp->st_stid); |
de18643d TM |
6260 | fput: |
6261 | fput(filp); | |
858cc573 | 6262 | put_stateid: |
feb9dad5 | 6263 | mutex_unlock(&stp->st_mutex); |
858cc573 | 6264 | nfs4_put_stid(&stp->st_stid); |
1da177e4 | 6265 | out: |
9411b1d4 | 6266 | nfsd4_bump_seqid(cstate, status); |
21179d81 JL |
6267 | if (file_lock) |
6268 | locks_free_lock(file_lock); | |
1da177e4 LT |
6269 | return status; |
6270 | ||
6271 | out_nfserr: | |
b8dd7b9a | 6272 | status = nfserrno(err); |
de18643d | 6273 | goto fput; |
1da177e4 LT |
6274 | } |
6275 | ||
6276 | /* | |
6277 | * returns | |
f9c00c3a JL |
6278 | * true: locks held by lockowner |
6279 | * false: no locks held by lockowner | |
1da177e4 | 6280 | */ |
f9c00c3a JL |
6281 | static bool |
6282 | check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner) | |
1da177e4 | 6283 | { |
bd61e0a9 | 6284 | struct file_lock *fl; |
f9c00c3a JL |
6285 | int status = false; |
6286 | struct file *filp = find_any_file(fp); | |
6287 | struct inode *inode; | |
bd61e0a9 | 6288 | struct file_lock_context *flctx; |
f9c00c3a JL |
6289 | |
6290 | if (!filp) { | |
6291 | /* Any valid lock stateid should have some sort of access */ | |
6292 | WARN_ON_ONCE(1); | |
6293 | return status; | |
6294 | } | |
6295 | ||
6296 | inode = file_inode(filp); | |
bd61e0a9 JL |
6297 | flctx = inode->i_flctx; |
6298 | ||
6299 | if (flctx && !list_empty_careful(&flctx->flc_posix)) { | |
6109c850 | 6300 | spin_lock(&flctx->flc_lock); |
bd61e0a9 JL |
6301 | list_for_each_entry(fl, &flctx->flc_posix, fl_list) { |
6302 | if (fl->fl_owner == (fl_owner_t)lowner) { | |
6303 | status = true; | |
6304 | break; | |
6305 | } | |
796dadfd | 6306 | } |
6109c850 | 6307 | spin_unlock(&flctx->flc_lock); |
1da177e4 | 6308 | } |
f9c00c3a | 6309 | fput(filp); |
1da177e4 LT |
6310 | return status; |
6311 | } | |
6312 | ||
b37ad28b | 6313 | __be32 |
b591480b BF |
6314 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
6315 | struct nfsd4_compound_state *cstate, | |
eb69853d | 6316 | union nfsd4_op_u *u) |
1da177e4 | 6317 | { |
eb69853d | 6318 | struct nfsd4_release_lockowner *rlockowner = &u->release_lockowner; |
1da177e4 | 6319 | clientid_t *clid = &rlockowner->rl_clientid; |
882e9d25 JL |
6320 | struct nfs4_stateowner *sop; |
6321 | struct nfs4_lockowner *lo = NULL; | |
dcef0413 | 6322 | struct nfs4_ol_stateid *stp; |
1da177e4 | 6323 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
d4f0489f | 6324 | unsigned int hashval = ownerstr_hashval(owner); |
b37ad28b | 6325 | __be32 status; |
7f2210fa | 6326 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
c58c6610 | 6327 | struct nfs4_client *clp; |
88584818 | 6328 | LIST_HEAD (reaplist); |
1da177e4 LT |
6329 | |
6330 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
6331 | clid->cl_boot, clid->cl_id); | |
6332 | ||
4b24ca7d | 6333 | status = lookup_clientid(clid, cstate, nn); |
9b2ef62b | 6334 | if (status) |
51f5e783 | 6335 | return status; |
9b2ef62b | 6336 | |
d4f0489f | 6337 | clp = cstate->clp; |
fd44907c | 6338 | /* Find the matching lock stateowner */ |
d4f0489f | 6339 | spin_lock(&clp->cl_lock); |
882e9d25 | 6340 | list_for_each_entry(sop, &clp->cl_ownerstr_hashtbl[hashval], |
d4f0489f | 6341 | so_strhash) { |
fd44907c | 6342 | |
882e9d25 JL |
6343 | if (sop->so_is_open_owner || !same_owner_str(sop, owner)) |
6344 | continue; | |
fd44907c | 6345 | |
882e9d25 JL |
6346 | /* see if there are still any locks associated with it */ |
6347 | lo = lockowner(sop); | |
6348 | list_for_each_entry(stp, &sop->so_stateids, st_perstateowner) { | |
6349 | if (check_for_locks(stp->st_stid.sc_file, lo)) { | |
6350 | status = nfserr_locks_held; | |
6351 | spin_unlock(&clp->cl_lock); | |
51f5e783 | 6352 | return status; |
882e9d25 | 6353 | } |
5adfd885 | 6354 | } |
882e9d25 | 6355 | |
b5971afa | 6356 | nfs4_get_stateowner(sop); |
882e9d25 | 6357 | break; |
1da177e4 | 6358 | } |
88584818 CL |
6359 | if (!lo) { |
6360 | spin_unlock(&clp->cl_lock); | |
6361 | return status; | |
6362 | } | |
6363 | ||
6364 | unhash_lockowner_locked(lo); | |
6365 | while (!list_empty(&lo->lo_owner.so_stateids)) { | |
6366 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
6367 | struct nfs4_ol_stateid, | |
6368 | st_perstateowner); | |
6369 | WARN_ON(!unhash_lock_stateid(stp)); | |
6370 | put_ol_stateid_locked(stp, &reaplist); | |
6371 | } | |
c58c6610 | 6372 | spin_unlock(&clp->cl_lock); |
88584818 | 6373 | free_ol_stateid_reaplist(&reaplist); |
68ef3bc3 | 6374 | remove_blocked_locks(lo); |
88584818 CL |
6375 | nfs4_put_stateowner(&lo->lo_owner); |
6376 | ||
1da177e4 LT |
6377 | return status; |
6378 | } | |
6379 | ||
6380 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 6381 | alloc_reclaim(void) |
1da177e4 | 6382 | { |
a55370a3 | 6383 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
6384 | } |
6385 | ||
0ce0c2b5 | 6386 | bool |
52e19c09 | 6387 | nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn) |
c7b9a459 | 6388 | { |
0ce0c2b5 | 6389 | struct nfs4_client_reclaim *crp; |
c7b9a459 | 6390 | |
52e19c09 | 6391 | crp = nfsd4_find_reclaim_client(name, nn); |
0ce0c2b5 | 6392 | return (crp && crp->cr_clp); |
c7b9a459 N |
6393 | } |
6394 | ||
1da177e4 LT |
6395 | /* |
6396 | * failure => all reset bets are off, nfserr_no_grace... | |
6397 | */ | |
772a9bbb | 6398 | struct nfs4_client_reclaim * |
52e19c09 | 6399 | nfs4_client_to_reclaim(const char *name, struct nfsd_net *nn) |
1da177e4 LT |
6400 | { |
6401 | unsigned int strhashval; | |
772a9bbb | 6402 | struct nfs4_client_reclaim *crp; |
1da177e4 | 6403 | |
a55370a3 N |
6404 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
6405 | crp = alloc_reclaim(); | |
772a9bbb JL |
6406 | if (crp) { |
6407 | strhashval = clientstr_hashval(name); | |
6408 | INIT_LIST_HEAD(&crp->cr_strhash); | |
52e19c09 | 6409 | list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]); |
772a9bbb | 6410 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
0ce0c2b5 | 6411 | crp->cr_clp = NULL; |
52e19c09 | 6412 | nn->reclaim_str_hashtbl_size++; |
772a9bbb JL |
6413 | } |
6414 | return crp; | |
1da177e4 LT |
6415 | } |
6416 | ||
ce30e539 | 6417 | void |
52e19c09 | 6418 | nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn) |
ce30e539 JL |
6419 | { |
6420 | list_del(&crp->cr_strhash); | |
6421 | kfree(crp); | |
52e19c09 | 6422 | nn->reclaim_str_hashtbl_size--; |
ce30e539 JL |
6423 | } |
6424 | ||
2a4317c5 | 6425 | void |
52e19c09 | 6426 | nfs4_release_reclaim(struct nfsd_net *nn) |
1da177e4 LT |
6427 | { |
6428 | struct nfs4_client_reclaim *crp = NULL; | |
6429 | int i; | |
6430 | ||
1da177e4 | 6431 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
52e19c09 SK |
6432 | while (!list_empty(&nn->reclaim_str_hashtbl[i])) { |
6433 | crp = list_entry(nn->reclaim_str_hashtbl[i].next, | |
1da177e4 | 6434 | struct nfs4_client_reclaim, cr_strhash); |
52e19c09 | 6435 | nfs4_remove_reclaim_record(crp, nn); |
1da177e4 LT |
6436 | } |
6437 | } | |
063b0fb9 | 6438 | WARN_ON_ONCE(nn->reclaim_str_hashtbl_size); |
1da177e4 LT |
6439 | } |
6440 | ||
6441 | /* | |
6442 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
2a4317c5 | 6443 | struct nfs4_client_reclaim * |
52e19c09 | 6444 | nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn) |
1da177e4 LT |
6445 | { |
6446 | unsigned int strhashval; | |
1da177e4 LT |
6447 | struct nfs4_client_reclaim *crp = NULL; |
6448 | ||
278c931c | 6449 | dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir); |
1da177e4 | 6450 | |
278c931c | 6451 | strhashval = clientstr_hashval(recdir); |
52e19c09 | 6452 | list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) { |
278c931c | 6453 | if (same_name(crp->cr_recdir, recdir)) { |
1da177e4 LT |
6454 | return crp; |
6455 | } | |
6456 | } | |
6457 | return NULL; | |
6458 | } | |
6459 | ||
6460 | /* | |
6461 | * Called from OPEN. Look for clientid in reclaim list. | |
6462 | */ | |
b37ad28b | 6463 | __be32 |
0fe492db TM |
6464 | nfs4_check_open_reclaim(clientid_t *clid, |
6465 | struct nfsd4_compound_state *cstate, | |
6466 | struct nfsd_net *nn) | |
1da177e4 | 6467 | { |
0fe492db | 6468 | __be32 status; |
a52d726b JL |
6469 | |
6470 | /* find clientid in conf_id_hashtbl */ | |
0fe492db TM |
6471 | status = lookup_clientid(clid, cstate, nn); |
6472 | if (status) | |
a52d726b JL |
6473 | return nfserr_reclaim_bad; |
6474 | ||
3b3e7b72 JL |
6475 | if (test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, &cstate->clp->cl_flags)) |
6476 | return nfserr_no_grace; | |
6477 | ||
0fe492db TM |
6478 | if (nfsd4_client_record_check(cstate->clp)) |
6479 | return nfserr_reclaim_bad; | |
6480 | ||
6481 | return nfs_ok; | |
1da177e4 LT |
6482 | } |
6483 | ||
65178db4 | 6484 | #ifdef CONFIG_NFSD_FAULT_INJECTION |
016200c3 JL |
6485 | static inline void |
6486 | put_client(struct nfs4_client *clp) | |
6487 | { | |
6488 | atomic_dec(&clp->cl_refcount); | |
6489 | } | |
6490 | ||
285abdee JL |
6491 | static struct nfs4_client * |
6492 | nfsd_find_client(struct sockaddr_storage *addr, size_t addr_size) | |
6493 | { | |
6494 | struct nfs4_client *clp; | |
6495 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6496 | nfsd_net_id); | |
6497 | ||
6498 | if (!nfsd_netns_ready(nn)) | |
6499 | return NULL; | |
6500 | ||
6501 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
6502 | if (memcmp(&clp->cl_addr, addr, addr_size) == 0) | |
6503 | return clp; | |
6504 | } | |
6505 | return NULL; | |
6506 | } | |
6507 | ||
7ec0e36f | 6508 | u64 |
285abdee | 6509 | nfsd_inject_print_clients(void) |
7ec0e36f JL |
6510 | { |
6511 | struct nfs4_client *clp; | |
6512 | u64 count = 0; | |
6513 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6514 | nfsd_net_id); | |
6515 | char buf[INET6_ADDRSTRLEN]; | |
6516 | ||
6517 | if (!nfsd_netns_ready(nn)) | |
6518 | return 0; | |
6519 | ||
6520 | spin_lock(&nn->client_lock); | |
6521 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
6522 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); | |
6523 | pr_info("NFS Client: %s\n", buf); | |
6524 | ++count; | |
6525 | } | |
6526 | spin_unlock(&nn->client_lock); | |
6527 | ||
6528 | return count; | |
6529 | } | |
65178db4 | 6530 | |
a0926d15 | 6531 | u64 |
285abdee | 6532 | nfsd_inject_forget_client(struct sockaddr_storage *addr, size_t addr_size) |
a0926d15 JL |
6533 | { |
6534 | u64 count = 0; | |
6535 | struct nfs4_client *clp; | |
6536 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6537 | nfsd_net_id); | |
6538 | ||
6539 | if (!nfsd_netns_ready(nn)) | |
6540 | return count; | |
6541 | ||
6542 | spin_lock(&nn->client_lock); | |
6543 | clp = nfsd_find_client(addr, addr_size); | |
6544 | if (clp) { | |
6545 | if (mark_client_expired_locked(clp) == nfs_ok) | |
6546 | ++count; | |
6547 | else | |
6548 | clp = NULL; | |
6549 | } | |
6550 | spin_unlock(&nn->client_lock); | |
6551 | ||
6552 | if (clp) | |
6553 | expire_client(clp); | |
6554 | ||
6555 | return count; | |
6556 | } | |
6557 | ||
69fc9edf | 6558 | u64 |
285abdee | 6559 | nfsd_inject_forget_clients(u64 max) |
69fc9edf JL |
6560 | { |
6561 | u64 count = 0; | |
6562 | struct nfs4_client *clp, *next; | |
6563 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6564 | nfsd_net_id); | |
6565 | LIST_HEAD(reaplist); | |
6566 | ||
6567 | if (!nfsd_netns_ready(nn)) | |
6568 | return count; | |
6569 | ||
6570 | spin_lock(&nn->client_lock); | |
6571 | list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { | |
6572 | if (mark_client_expired_locked(clp) == nfs_ok) { | |
6573 | list_add(&clp->cl_lru, &reaplist); | |
6574 | if (max != 0 && ++count >= max) | |
6575 | break; | |
6576 | } | |
6577 | } | |
6578 | spin_unlock(&nn->client_lock); | |
6579 | ||
6580 | list_for_each_entry_safe(clp, next, &reaplist, cl_lru) | |
6581 | expire_client(clp); | |
6582 | ||
6583 | return count; | |
6584 | } | |
6585 | ||
184c1847 BS |
6586 | static void nfsd_print_count(struct nfs4_client *clp, unsigned int count, |
6587 | const char *type) | |
6588 | { | |
6589 | char buf[INET6_ADDRSTRLEN]; | |
0a5c33e2 | 6590 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
184c1847 BS |
6591 | printk(KERN_INFO "NFS Client: %s has %u %s\n", buf, count, type); |
6592 | } | |
6593 | ||
016200c3 JL |
6594 | static void |
6595 | nfsd_inject_add_lock_to_list(struct nfs4_ol_stateid *lst, | |
6596 | struct list_head *collect) | |
6597 | { | |
6598 | struct nfs4_client *clp = lst->st_stid.sc_client; | |
6599 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6600 | nfsd_net_id); | |
6601 | ||
6602 | if (!collect) | |
6603 | return; | |
6604 | ||
6605 | lockdep_assert_held(&nn->client_lock); | |
6606 | atomic_inc(&clp->cl_refcount); | |
6607 | list_add(&lst->st_locks, collect); | |
6608 | } | |
6609 | ||
3c87b9b7 | 6610 | static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max, |
3738d50e | 6611 | struct list_head *collect, |
e8568739 | 6612 | bool (*func)(struct nfs4_ol_stateid *)) |
fc29171f BS |
6613 | { |
6614 | struct nfs4_openowner *oop; | |
fc29171f | 6615 | struct nfs4_ol_stateid *stp, *st_next; |
3c87b9b7 | 6616 | struct nfs4_ol_stateid *lst, *lst_next; |
fc29171f BS |
6617 | u64 count = 0; |
6618 | ||
016200c3 | 6619 | spin_lock(&clp->cl_lock); |
fc29171f | 6620 | list_for_each_entry(oop, &clp->cl_openowners, oo_perclient) { |
3c87b9b7 TM |
6621 | list_for_each_entry_safe(stp, st_next, |
6622 | &oop->oo_owner.so_stateids, st_perstateowner) { | |
6623 | list_for_each_entry_safe(lst, lst_next, | |
6624 | &stp->st_locks, st_locks) { | |
3738d50e | 6625 | if (func) { |
e8568739 JL |
6626 | if (func(lst)) |
6627 | nfsd_inject_add_lock_to_list(lst, | |
6628 | collect); | |
3738d50e | 6629 | } |
016200c3 JL |
6630 | ++count; |
6631 | /* | |
6632 | * Despite the fact that these functions deal | |
6633 | * with 64-bit integers for "count", we must | |
6634 | * ensure that it doesn't blow up the | |
6635 | * clp->cl_refcount. Throw a warning if we | |
6636 | * start to approach INT_MAX here. | |
6637 | */ | |
6638 | WARN_ON_ONCE(count == (INT_MAX / 2)); | |
6639 | if (count == max) | |
6640 | goto out; | |
fc29171f BS |
6641 | } |
6642 | } | |
6643 | } | |
016200c3 JL |
6644 | out: |
6645 | spin_unlock(&clp->cl_lock); | |
fc29171f BS |
6646 | |
6647 | return count; | |
6648 | } | |
6649 | ||
016200c3 JL |
6650 | static u64 |
6651 | nfsd_collect_client_locks(struct nfs4_client *clp, struct list_head *collect, | |
6652 | u64 max) | |
fc29171f | 6653 | { |
016200c3 | 6654 | return nfsd_foreach_client_lock(clp, max, collect, unhash_lock_stateid); |
fc29171f BS |
6655 | } |
6656 | ||
016200c3 JL |
6657 | static u64 |
6658 | nfsd_print_client_locks(struct nfs4_client *clp) | |
184c1847 | 6659 | { |
016200c3 | 6660 | u64 count = nfsd_foreach_client_lock(clp, 0, NULL, NULL); |
184c1847 BS |
6661 | nfsd_print_count(clp, count, "locked files"); |
6662 | return count; | |
6663 | } | |
6664 | ||
016200c3 | 6665 | u64 |
285abdee | 6666 | nfsd_inject_print_locks(void) |
016200c3 JL |
6667 | { |
6668 | struct nfs4_client *clp; | |
6669 | u64 count = 0; | |
6670 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6671 | nfsd_net_id); | |
6672 | ||
6673 | if (!nfsd_netns_ready(nn)) | |
6674 | return 0; | |
6675 | ||
6676 | spin_lock(&nn->client_lock); | |
6677 | list_for_each_entry(clp, &nn->client_lru, cl_lru) | |
6678 | count += nfsd_print_client_locks(clp); | |
6679 | spin_unlock(&nn->client_lock); | |
6680 | ||
6681 | return count; | |
6682 | } | |
6683 | ||
6684 | static void | |
6685 | nfsd_reap_locks(struct list_head *reaplist) | |
6686 | { | |
6687 | struct nfs4_client *clp; | |
6688 | struct nfs4_ol_stateid *stp, *next; | |
6689 | ||
6690 | list_for_each_entry_safe(stp, next, reaplist, st_locks) { | |
6691 | list_del_init(&stp->st_locks); | |
6692 | clp = stp->st_stid.sc_client; | |
6693 | nfs4_put_stid(&stp->st_stid); | |
6694 | put_client(clp); | |
6695 | } | |
6696 | } | |
6697 | ||
6698 | u64 | |
285abdee | 6699 | nfsd_inject_forget_client_locks(struct sockaddr_storage *addr, size_t addr_size) |
016200c3 JL |
6700 | { |
6701 | unsigned int count = 0; | |
6702 | struct nfs4_client *clp; | |
6703 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6704 | nfsd_net_id); | |
6705 | LIST_HEAD(reaplist); | |
6706 | ||
6707 | if (!nfsd_netns_ready(nn)) | |
6708 | return count; | |
6709 | ||
6710 | spin_lock(&nn->client_lock); | |
6711 | clp = nfsd_find_client(addr, addr_size); | |
6712 | if (clp) | |
6713 | count = nfsd_collect_client_locks(clp, &reaplist, 0); | |
6714 | spin_unlock(&nn->client_lock); | |
6715 | nfsd_reap_locks(&reaplist); | |
6716 | return count; | |
6717 | } | |
6718 | ||
6719 | u64 | |
285abdee | 6720 | nfsd_inject_forget_locks(u64 max) |
016200c3 JL |
6721 | { |
6722 | u64 count = 0; | |
6723 | struct nfs4_client *clp; | |
6724 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6725 | nfsd_net_id); | |
6726 | LIST_HEAD(reaplist); | |
6727 | ||
6728 | if (!nfsd_netns_ready(nn)) | |
6729 | return count; | |
6730 | ||
6731 | spin_lock(&nn->client_lock); | |
6732 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
6733 | count += nfsd_collect_client_locks(clp, &reaplist, max - count); | |
6734 | if (max != 0 && count >= max) | |
6735 | break; | |
6736 | } | |
6737 | spin_unlock(&nn->client_lock); | |
6738 | nfsd_reap_locks(&reaplist); | |
6739 | return count; | |
6740 | } | |
6741 | ||
82e05efa JL |
6742 | static u64 |
6743 | nfsd_foreach_client_openowner(struct nfs4_client *clp, u64 max, | |
6744 | struct list_head *collect, | |
6745 | void (*func)(struct nfs4_openowner *)) | |
4dbdbda8 BS |
6746 | { |
6747 | struct nfs4_openowner *oop, *next; | |
82e05efa JL |
6748 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, |
6749 | nfsd_net_id); | |
4dbdbda8 BS |
6750 | u64 count = 0; |
6751 | ||
82e05efa JL |
6752 | lockdep_assert_held(&nn->client_lock); |
6753 | ||
6754 | spin_lock(&clp->cl_lock); | |
4dbdbda8 | 6755 | list_for_each_entry_safe(oop, next, &clp->cl_openowners, oo_perclient) { |
82e05efa | 6756 | if (func) { |
4dbdbda8 | 6757 | func(oop); |
82e05efa JL |
6758 | if (collect) { |
6759 | atomic_inc(&clp->cl_refcount); | |
6760 | list_add(&oop->oo_perclient, collect); | |
6761 | } | |
6762 | } | |
6763 | ++count; | |
6764 | /* | |
6765 | * Despite the fact that these functions deal with | |
6766 | * 64-bit integers for "count", we must ensure that | |
6767 | * it doesn't blow up the clp->cl_refcount. Throw a | |
6768 | * warning if we start to approach INT_MAX here. | |
6769 | */ | |
6770 | WARN_ON_ONCE(count == (INT_MAX / 2)); | |
6771 | if (count == max) | |
4dbdbda8 BS |
6772 | break; |
6773 | } | |
82e05efa JL |
6774 | spin_unlock(&clp->cl_lock); |
6775 | ||
6776 | return count; | |
6777 | } | |
6778 | ||
6779 | static u64 | |
6780 | nfsd_print_client_openowners(struct nfs4_client *clp) | |
6781 | { | |
6782 | u64 count = nfsd_foreach_client_openowner(clp, 0, NULL, NULL); | |
6783 | ||
6784 | nfsd_print_count(clp, count, "openowners"); | |
6785 | return count; | |
6786 | } | |
6787 | ||
6788 | static u64 | |
6789 | nfsd_collect_client_openowners(struct nfs4_client *clp, | |
6790 | struct list_head *collect, u64 max) | |
6791 | { | |
6792 | return nfsd_foreach_client_openowner(clp, max, collect, | |
6793 | unhash_openowner_locked); | |
6794 | } | |
6795 | ||
6796 | u64 | |
285abdee | 6797 | nfsd_inject_print_openowners(void) |
82e05efa JL |
6798 | { |
6799 | struct nfs4_client *clp; | |
6800 | u64 count = 0; | |
6801 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6802 | nfsd_net_id); | |
6803 | ||
6804 | if (!nfsd_netns_ready(nn)) | |
6805 | return 0; | |
6806 | ||
6807 | spin_lock(&nn->client_lock); | |
6808 | list_for_each_entry(clp, &nn->client_lru, cl_lru) | |
6809 | count += nfsd_print_client_openowners(clp); | |
6810 | spin_unlock(&nn->client_lock); | |
4dbdbda8 BS |
6811 | |
6812 | return count; | |
6813 | } | |
6814 | ||
82e05efa JL |
6815 | static void |
6816 | nfsd_reap_openowners(struct list_head *reaplist) | |
6817 | { | |
6818 | struct nfs4_client *clp; | |
6819 | struct nfs4_openowner *oop, *next; | |
6820 | ||
6821 | list_for_each_entry_safe(oop, next, reaplist, oo_perclient) { | |
6822 | list_del_init(&oop->oo_perclient); | |
6823 | clp = oop->oo_owner.so_client; | |
6824 | release_openowner(oop); | |
6825 | put_client(clp); | |
6826 | } | |
6827 | } | |
6828 | ||
6829 | u64 | |
285abdee JL |
6830 | nfsd_inject_forget_client_openowners(struct sockaddr_storage *addr, |
6831 | size_t addr_size) | |
4dbdbda8 | 6832 | { |
82e05efa JL |
6833 | unsigned int count = 0; |
6834 | struct nfs4_client *clp; | |
6835 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6836 | nfsd_net_id); | |
6837 | LIST_HEAD(reaplist); | |
6838 | ||
6839 | if (!nfsd_netns_ready(nn)) | |
6840 | return count; | |
6841 | ||
6842 | spin_lock(&nn->client_lock); | |
6843 | clp = nfsd_find_client(addr, addr_size); | |
6844 | if (clp) | |
6845 | count = nfsd_collect_client_openowners(clp, &reaplist, 0); | |
6846 | spin_unlock(&nn->client_lock); | |
6847 | nfsd_reap_openowners(&reaplist); | |
6848 | return count; | |
4dbdbda8 BS |
6849 | } |
6850 | ||
82e05efa | 6851 | u64 |
285abdee | 6852 | nfsd_inject_forget_openowners(u64 max) |
184c1847 | 6853 | { |
82e05efa JL |
6854 | u64 count = 0; |
6855 | struct nfs4_client *clp; | |
6856 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6857 | nfsd_net_id); | |
6858 | LIST_HEAD(reaplist); | |
6859 | ||
6860 | if (!nfsd_netns_ready(nn)) | |
6861 | return count; | |
6862 | ||
6863 | spin_lock(&nn->client_lock); | |
6864 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
6865 | count += nfsd_collect_client_openowners(clp, &reaplist, | |
6866 | max - count); | |
6867 | if (max != 0 && count >= max) | |
6868 | break; | |
6869 | } | |
6870 | spin_unlock(&nn->client_lock); | |
6871 | nfsd_reap_openowners(&reaplist); | |
184c1847 BS |
6872 | return count; |
6873 | } | |
6874 | ||
269de30f BS |
6875 | static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max, |
6876 | struct list_head *victims) | |
6877 | { | |
6878 | struct nfs4_delegation *dp, *next; | |
98d5c7c5 JL |
6879 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, |
6880 | nfsd_net_id); | |
269de30f BS |
6881 | u64 count = 0; |
6882 | ||
98d5c7c5 JL |
6883 | lockdep_assert_held(&nn->client_lock); |
6884 | ||
6885 | spin_lock(&state_lock); | |
269de30f | 6886 | list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) { |
dff1399f JL |
6887 | if (victims) { |
6888 | /* | |
6889 | * It's not safe to mess with delegations that have a | |
6890 | * non-zero dl_time. They might have already been broken | |
6891 | * and could be processed by the laundromat outside of | |
6892 | * the state_lock. Just leave them be. | |
6893 | */ | |
6894 | if (dp->dl_time != 0) | |
6895 | continue; | |
6896 | ||
98d5c7c5 | 6897 | atomic_inc(&clp->cl_refcount); |
3fcbbd24 | 6898 | WARN_ON(!unhash_delegation_locked(dp)); |
42690676 | 6899 | list_add(&dp->dl_recall_lru, victims); |
dff1399f | 6900 | } |
98d5c7c5 JL |
6901 | ++count; |
6902 | /* | |
6903 | * Despite the fact that these functions deal with | |
6904 | * 64-bit integers for "count", we must ensure that | |
6905 | * it doesn't blow up the clp->cl_refcount. Throw a | |
6906 | * warning if we start to approach INT_MAX here. | |
6907 | */ | |
6908 | WARN_ON_ONCE(count == (INT_MAX / 2)); | |
6909 | if (count == max) | |
269de30f BS |
6910 | break; |
6911 | } | |
98d5c7c5 | 6912 | spin_unlock(&state_lock); |
269de30f BS |
6913 | return count; |
6914 | } | |
6915 | ||
98d5c7c5 JL |
6916 | static u64 |
6917 | nfsd_print_client_delegations(struct nfs4_client *clp) | |
269de30f | 6918 | { |
98d5c7c5 | 6919 | u64 count = nfsd_find_all_delegations(clp, 0, NULL); |
269de30f | 6920 | |
98d5c7c5 JL |
6921 | nfsd_print_count(clp, count, "delegations"); |
6922 | return count; | |
6923 | } | |
6924 | ||
6925 | u64 | |
285abdee | 6926 | nfsd_inject_print_delegations(void) |
98d5c7c5 JL |
6927 | { |
6928 | struct nfs4_client *clp; | |
6929 | u64 count = 0; | |
6930 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6931 | nfsd_net_id); | |
6932 | ||
6933 | if (!nfsd_netns_ready(nn)) | |
6934 | return 0; | |
269de30f | 6935 | |
98d5c7c5 JL |
6936 | spin_lock(&nn->client_lock); |
6937 | list_for_each_entry(clp, &nn->client_lru, cl_lru) | |
6938 | count += nfsd_print_client_delegations(clp); | |
6939 | spin_unlock(&nn->client_lock); | |
6940 | ||
6941 | return count; | |
6942 | } | |
6943 | ||
6944 | static void | |
6945 | nfsd_forget_delegations(struct list_head *reaplist) | |
6946 | { | |
6947 | struct nfs4_client *clp; | |
6948 | struct nfs4_delegation *dp, *next; | |
6949 | ||
6950 | list_for_each_entry_safe(dp, next, reaplist, dl_recall_lru) { | |
2d4a532d | 6951 | list_del_init(&dp->dl_recall_lru); |
98d5c7c5 | 6952 | clp = dp->dl_stid.sc_client; |
3bd64a5b | 6953 | revoke_delegation(dp); |
98d5c7c5 | 6954 | put_client(clp); |
2d4a532d | 6955 | } |
98d5c7c5 JL |
6956 | } |
6957 | ||
6958 | u64 | |
285abdee JL |
6959 | nfsd_inject_forget_client_delegations(struct sockaddr_storage *addr, |
6960 | size_t addr_size) | |
98d5c7c5 JL |
6961 | { |
6962 | u64 count = 0; | |
6963 | struct nfs4_client *clp; | |
6964 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6965 | nfsd_net_id); | |
6966 | LIST_HEAD(reaplist); | |
6967 | ||
6968 | if (!nfsd_netns_ready(nn)) | |
6969 | return count; | |
6970 | ||
6971 | spin_lock(&nn->client_lock); | |
6972 | clp = nfsd_find_client(addr, addr_size); | |
6973 | if (clp) | |
6974 | count = nfsd_find_all_delegations(clp, 0, &reaplist); | |
6975 | spin_unlock(&nn->client_lock); | |
6976 | ||
6977 | nfsd_forget_delegations(&reaplist); | |
6978 | return count; | |
6979 | } | |
269de30f | 6980 | |
98d5c7c5 | 6981 | u64 |
285abdee | 6982 | nfsd_inject_forget_delegations(u64 max) |
98d5c7c5 JL |
6983 | { |
6984 | u64 count = 0; | |
6985 | struct nfs4_client *clp; | |
6986 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6987 | nfsd_net_id); | |
6988 | LIST_HEAD(reaplist); | |
6989 | ||
6990 | if (!nfsd_netns_ready(nn)) | |
6991 | return count; | |
6992 | ||
6993 | spin_lock(&nn->client_lock); | |
6994 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
6995 | count += nfsd_find_all_delegations(clp, max - count, &reaplist); | |
6996 | if (max != 0 && count >= max) | |
6997 | break; | |
6998 | } | |
6999 | spin_unlock(&nn->client_lock); | |
7000 | nfsd_forget_delegations(&reaplist); | |
269de30f BS |
7001 | return count; |
7002 | } | |
7003 | ||
98d5c7c5 JL |
7004 | static void |
7005 | nfsd_recall_delegations(struct list_head *reaplist) | |
269de30f | 7006 | { |
98d5c7c5 JL |
7007 | struct nfs4_client *clp; |
7008 | struct nfs4_delegation *dp, *next; | |
269de30f | 7009 | |
98d5c7c5 | 7010 | list_for_each_entry_safe(dp, next, reaplist, dl_recall_lru) { |
dff1399f | 7011 | list_del_init(&dp->dl_recall_lru); |
98d5c7c5 JL |
7012 | clp = dp->dl_stid.sc_client; |
7013 | /* | |
7014 | * We skipped all entries that had a zero dl_time before, | |
7015 | * so we can now reset the dl_time back to 0. If a delegation | |
7016 | * break comes in now, then it won't make any difference since | |
7017 | * we're recalling it either way. | |
7018 | */ | |
7019 | spin_lock(&state_lock); | |
dff1399f | 7020 | dp->dl_time = 0; |
98d5c7c5 | 7021 | spin_unlock(&state_lock); |
269de30f | 7022 | nfsd_break_one_deleg(dp); |
98d5c7c5 | 7023 | put_client(clp); |
dff1399f | 7024 | } |
98d5c7c5 | 7025 | } |
269de30f | 7026 | |
98d5c7c5 | 7027 | u64 |
285abdee | 7028 | nfsd_inject_recall_client_delegations(struct sockaddr_storage *addr, |
98d5c7c5 JL |
7029 | size_t addr_size) |
7030 | { | |
7031 | u64 count = 0; | |
7032 | struct nfs4_client *clp; | |
7033 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
7034 | nfsd_net_id); | |
7035 | LIST_HEAD(reaplist); | |
7036 | ||
7037 | if (!nfsd_netns_ready(nn)) | |
7038 | return count; | |
7039 | ||
7040 | spin_lock(&nn->client_lock); | |
7041 | clp = nfsd_find_client(addr, addr_size); | |
7042 | if (clp) | |
7043 | count = nfsd_find_all_delegations(clp, 0, &reaplist); | |
7044 | spin_unlock(&nn->client_lock); | |
7045 | ||
7046 | nfsd_recall_delegations(&reaplist); | |
269de30f BS |
7047 | return count; |
7048 | } | |
7049 | ||
98d5c7c5 | 7050 | u64 |
285abdee | 7051 | nfsd_inject_recall_delegations(u64 max) |
184c1847 BS |
7052 | { |
7053 | u64 count = 0; | |
98d5c7c5 JL |
7054 | struct nfs4_client *clp, *next; |
7055 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
7056 | nfsd_net_id); | |
7057 | LIST_HEAD(reaplist); | |
184c1847 | 7058 | |
98d5c7c5 JL |
7059 | if (!nfsd_netns_ready(nn)) |
7060 | return count; | |
184c1847 | 7061 | |
98d5c7c5 JL |
7062 | spin_lock(&nn->client_lock); |
7063 | list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { | |
7064 | count += nfsd_find_all_delegations(clp, max - count, &reaplist); | |
7065 | if (max != 0 && ++count >= max) | |
7066 | break; | |
7067 | } | |
7068 | spin_unlock(&nn->client_lock); | |
7069 | nfsd_recall_delegations(&reaplist); | |
184c1847 BS |
7070 | return count; |
7071 | } | |
65178db4 BS |
7072 | #endif /* CONFIG_NFSD_FAULT_INJECTION */ |
7073 | ||
c2f1a551 MS |
7074 | /* |
7075 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
7076 | * client may quite reasonably hang on to a delegation as long as it has | |
7077 | * the inode cached. This becomes an obvious problem the first time a | |
7078 | * client's inode cache approaches the size of the server's total memory. | |
7079 | * | |
7080 | * For now we avoid this problem by imposing a hard limit on the number | |
7081 | * of delegations, which varies according to the server's memory size. | |
7082 | */ | |
7083 | static void | |
7084 | set_max_delegations(void) | |
7085 | { | |
7086 | /* | |
7087 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
7088 | * estimates suggest that in the worst case (where every delegation | |
7089 | * is for a different inode), a delegation could take about 1.5K, | |
7090 | * giving a worst case usage of about 6% of memory. | |
7091 | */ | |
7092 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
7093 | } | |
7094 | ||
d85ed443 | 7095 | static int nfs4_state_create_net(struct net *net) |
8daae4dc SK |
7096 | { |
7097 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
7098 | int i; | |
7099 | ||
6da2ec56 KC |
7100 | nn->conf_id_hashtbl = kmalloc_array(CLIENT_HASH_SIZE, |
7101 | sizeof(struct list_head), | |
7102 | GFP_KERNEL); | |
8daae4dc | 7103 | if (!nn->conf_id_hashtbl) |
382a62e7 | 7104 | goto err; |
6da2ec56 KC |
7105 | nn->unconf_id_hashtbl = kmalloc_array(CLIENT_HASH_SIZE, |
7106 | sizeof(struct list_head), | |
7107 | GFP_KERNEL); | |
0a7ec377 SK |
7108 | if (!nn->unconf_id_hashtbl) |
7109 | goto err_unconf_id; | |
6da2ec56 KC |
7110 | nn->sessionid_hashtbl = kmalloc_array(SESSION_HASH_SIZE, |
7111 | sizeof(struct list_head), | |
7112 | GFP_KERNEL); | |
1872de0e SK |
7113 | if (!nn->sessionid_hashtbl) |
7114 | goto err_sessionid; | |
8daae4dc | 7115 | |
382a62e7 | 7116 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
8daae4dc | 7117 | INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]); |
0a7ec377 | 7118 | INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]); |
382a62e7 | 7119 | } |
1872de0e SK |
7120 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
7121 | INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]); | |
382a62e7 | 7122 | nn->conf_name_tree = RB_ROOT; |
a99454aa | 7123 | nn->unconf_name_tree = RB_ROOT; |
81833de1 VA |
7124 | nn->boot_time = get_seconds(); |
7125 | nn->grace_ended = false; | |
7126 | nn->nfsd4_manager.block_opens = true; | |
7127 | INIT_LIST_HEAD(&nn->nfsd4_manager.list); | |
5ed58bb2 | 7128 | INIT_LIST_HEAD(&nn->client_lru); |
73758fed | 7129 | INIT_LIST_HEAD(&nn->close_lru); |
e8c69d17 | 7130 | INIT_LIST_HEAD(&nn->del_recall_lru); |
c9a49628 | 7131 | spin_lock_init(&nn->client_lock); |
8daae4dc | 7132 | |
0cc11a61 JL |
7133 | spin_lock_init(&nn->blocked_locks_lock); |
7134 | INIT_LIST_HEAD(&nn->blocked_locks_lru); | |
7135 | ||
09121281 | 7136 | INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main); |
d85ed443 | 7137 | get_net(net); |
09121281 | 7138 | |
8daae4dc | 7139 | return 0; |
382a62e7 | 7140 | |
1872de0e | 7141 | err_sessionid: |
9b531137 | 7142 | kfree(nn->unconf_id_hashtbl); |
0a7ec377 SK |
7143 | err_unconf_id: |
7144 | kfree(nn->conf_id_hashtbl); | |
382a62e7 SK |
7145 | err: |
7146 | return -ENOMEM; | |
8daae4dc SK |
7147 | } |
7148 | ||
7149 | static void | |
4dce0ac9 | 7150 | nfs4_state_destroy_net(struct net *net) |
8daae4dc SK |
7151 | { |
7152 | int i; | |
7153 | struct nfs4_client *clp = NULL; | |
7154 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
7155 | ||
7156 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { | |
7157 | while (!list_empty(&nn->conf_id_hashtbl[i])) { | |
7158 | clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
7159 | destroy_client(clp); | |
7160 | } | |
7161 | } | |
a99454aa | 7162 | |
68ef3bc3 JL |
7163 | WARN_ON(!list_empty(&nn->blocked_locks_lru)); |
7164 | ||
2b905635 KM |
7165 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
7166 | while (!list_empty(&nn->unconf_id_hashtbl[i])) { | |
7167 | clp = list_entry(nn->unconf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
7168 | destroy_client(clp); | |
7169 | } | |
a99454aa SK |
7170 | } |
7171 | ||
1872de0e | 7172 | kfree(nn->sessionid_hashtbl); |
0a7ec377 | 7173 | kfree(nn->unconf_id_hashtbl); |
8daae4dc | 7174 | kfree(nn->conf_id_hashtbl); |
4dce0ac9 | 7175 | put_net(net); |
8daae4dc SK |
7176 | } |
7177 | ||
f252bc68 | 7178 | int |
d85ed443 | 7179 | nfs4_state_start_net(struct net *net) |
ac4d8ff2 | 7180 | { |
5e1533c7 | 7181 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b5a1a81e BF |
7182 | int ret; |
7183 | ||
d85ed443 | 7184 | ret = nfs4_state_create_net(net); |
8daae4dc SK |
7185 | if (ret) |
7186 | return ret; | |
d4318acd JL |
7187 | locks_start_grace(net, &nn->nfsd4_manager); |
7188 | nfsd4_client_tracking_init(net); | |
7e981a8a VA |
7189 | printk(KERN_INFO "NFSD: starting %ld-second grace period (net %x)\n", |
7190 | nn->nfsd4_grace, net->ns.inum); | |
5284b44e | 7191 | queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ); |
d85ed443 SK |
7192 | return 0; |
7193 | } | |
7194 | ||
7195 | /* initialization to perform when the nfsd service is started: */ | |
7196 | ||
7197 | int | |
7198 | nfs4_state_start(void) | |
7199 | { | |
7200 | int ret; | |
7201 | ||
b5a1a81e | 7202 | ret = set_callback_cred(); |
d85ed443 | 7203 | if (ret) |
f7d1ddbe KM |
7204 | return ret; |
7205 | ||
51a54568 | 7206 | laundry_wq = alloc_workqueue("%s", WQ_UNBOUND, 0, "nfsd4"); |
a6d6b781 JL |
7207 | if (laundry_wq == NULL) { |
7208 | ret = -ENOMEM; | |
f7d1ddbe | 7209 | goto out_cleanup_cred; |
a6d6b781 | 7210 | } |
b5a1a81e BF |
7211 | ret = nfsd4_create_callback_queue(); |
7212 | if (ret) | |
7213 | goto out_free_laundry; | |
09121281 | 7214 | |
c2f1a551 | 7215 | set_max_delegations(); |
b5a1a81e | 7216 | return 0; |
d85ed443 | 7217 | |
b5a1a81e BF |
7218 | out_free_laundry: |
7219 | destroy_workqueue(laundry_wq); | |
f7d1ddbe KM |
7220 | out_cleanup_cred: |
7221 | cleanup_callback_cred(); | |
b5a1a81e | 7222 | return ret; |
1da177e4 LT |
7223 | } |
7224 | ||
f252bc68 | 7225 | void |
4dce0ac9 | 7226 | nfs4_state_shutdown_net(struct net *net) |
1da177e4 | 7227 | { |
1da177e4 | 7228 | struct nfs4_delegation *dp = NULL; |
1da177e4 | 7229 | struct list_head *pos, *next, reaplist; |
4dce0ac9 | 7230 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
1da177e4 | 7231 | |
4dce0ac9 SK |
7232 | cancel_delayed_work_sync(&nn->laundromat_work); |
7233 | locks_end_grace(&nn->nfsd4_manager); | |
ac55fdc4 | 7234 | |
1da177e4 | 7235 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 7236 | spin_lock(&state_lock); |
e8c69d17 | 7237 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 | 7238 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
3fcbbd24 | 7239 | WARN_ON(!unhash_delegation_locked(dp)); |
42690676 | 7240 | list_add(&dp->dl_recall_lru, &reaplist); |
1da177e4 | 7241 | } |
cdc97505 | 7242 | spin_unlock(&state_lock); |
1da177e4 LT |
7243 | list_for_each_safe(pos, next, &reaplist) { |
7244 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
42690676 | 7245 | list_del_init(&dp->dl_recall_lru); |
0af6e690 | 7246 | destroy_unhashed_deleg(dp); |
1da177e4 LT |
7247 | } |
7248 | ||
3320fef1 | 7249 | nfsd4_client_tracking_exit(net); |
4dce0ac9 | 7250 | nfs4_state_destroy_net(net); |
1da177e4 LT |
7251 | } |
7252 | ||
7253 | void | |
7254 | nfs4_state_shutdown(void) | |
7255 | { | |
5e8d5c29 | 7256 | destroy_workqueue(laundry_wq); |
c3935e30 | 7257 | nfsd4_destroy_callback_queue(); |
f7d1ddbe | 7258 | cleanup_callback_cred(); |
1da177e4 | 7259 | } |
8b70484c TM |
7260 | |
7261 | static void | |
7262 | get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
7263 | { | |
37c593c5 TM |
7264 | if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) |
7265 | memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); | |
8b70484c TM |
7266 | } |
7267 | ||
7268 | static void | |
7269 | put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
7270 | { | |
37c593c5 TM |
7271 | if (cstate->minorversion) { |
7272 | memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); | |
7273 | SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
7274 | } | |
7275 | } | |
7276 | ||
7277 | void | |
7278 | clear_current_stateid(struct nfsd4_compound_state *cstate) | |
7279 | { | |
7280 | CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
8b70484c TM |
7281 | } |
7282 | ||
62cd4a59 TM |
7283 | /* |
7284 | * functions to set current state id | |
7285 | */ | |
9428fe1a | 7286 | void |
b60e9859 CH |
7287 | nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, |
7288 | union nfsd4_op_u *u) | |
9428fe1a | 7289 | { |
b60e9859 | 7290 | put_stateid(cstate, &u->open_downgrade.od_stateid); |
9428fe1a TM |
7291 | } |
7292 | ||
8b70484c | 7293 | void |
b60e9859 CH |
7294 | nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, |
7295 | union nfsd4_op_u *u) | |
8b70484c | 7296 | { |
b60e9859 | 7297 | put_stateid(cstate, &u->open.op_stateid); |
8b70484c TM |
7298 | } |
7299 | ||
62cd4a59 | 7300 | void |
b60e9859 CH |
7301 | nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, |
7302 | union nfsd4_op_u *u) | |
62cd4a59 | 7303 | { |
b60e9859 | 7304 | put_stateid(cstate, &u->close.cl_stateid); |
62cd4a59 TM |
7305 | } |
7306 | ||
7307 | void | |
b60e9859 CH |
7308 | nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, |
7309 | union nfsd4_op_u *u) | |
62cd4a59 | 7310 | { |
b60e9859 | 7311 | put_stateid(cstate, &u->lock.lk_resp_stateid); |
62cd4a59 TM |
7312 | } |
7313 | ||
7314 | /* | |
7315 | * functions to consume current state id | |
7316 | */ | |
1e97b519 | 7317 | |
9428fe1a | 7318 | void |
57832e7b CH |
7319 | nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, |
7320 | union nfsd4_op_u *u) | |
9428fe1a | 7321 | { |
57832e7b | 7322 | get_stateid(cstate, &u->open_downgrade.od_stateid); |
9428fe1a TM |
7323 | } |
7324 | ||
7325 | void | |
57832e7b CH |
7326 | nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, |
7327 | union nfsd4_op_u *u) | |
9428fe1a | 7328 | { |
57832e7b | 7329 | get_stateid(cstate, &u->delegreturn.dr_stateid); |
9428fe1a TM |
7330 | } |
7331 | ||
1e97b519 | 7332 | void |
57832e7b CH |
7333 | nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, |
7334 | union nfsd4_op_u *u) | |
1e97b519 | 7335 | { |
57832e7b | 7336 | get_stateid(cstate, &u->free_stateid.fr_stateid); |
1e97b519 TM |
7337 | } |
7338 | ||
7339 | void | |
57832e7b CH |
7340 | nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, |
7341 | union nfsd4_op_u *u) | |
1e97b519 | 7342 | { |
57832e7b | 7343 | get_stateid(cstate, &u->setattr.sa_stateid); |
1e97b519 TM |
7344 | } |
7345 | ||
8b70484c | 7346 | void |
57832e7b CH |
7347 | nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, |
7348 | union nfsd4_op_u *u) | |
8b70484c | 7349 | { |
57832e7b | 7350 | get_stateid(cstate, &u->close.cl_stateid); |
8b70484c TM |
7351 | } |
7352 | ||
7353 | void | |
57832e7b CH |
7354 | nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, |
7355 | union nfsd4_op_u *u) | |
8b70484c | 7356 | { |
57832e7b | 7357 | get_stateid(cstate, &u->locku.lu_stateid); |
8b70484c | 7358 | } |
30813e27 TM |
7359 | |
7360 | void | |
57832e7b CH |
7361 | nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, |
7362 | union nfsd4_op_u *u) | |
30813e27 | 7363 | { |
57832e7b | 7364 | get_stateid(cstate, &u->read.rd_stateid); |
30813e27 TM |
7365 | } |
7366 | ||
7367 | void | |
57832e7b CH |
7368 | nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, |
7369 | union nfsd4_op_u *u) | |
30813e27 | 7370 | { |
57832e7b | 7371 | get_stateid(cstate, &u->write.wr_stateid); |
30813e27 | 7372 | } |