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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); |
362063a5 | 80 | void nfsd4_end_grace(struct nfsd_net *nn); |
1da177e4 | 81 | |
8b671b80 BF |
82 | /* Locking: */ |
83 | ||
8b671b80 BF |
84 | /* |
85 | * Currently used for the del_recall_lru and file hash table. In an | |
86 | * effort to decrease the scope of the client_mutex, this spinlock may | |
87 | * eventually cover more: | |
88 | */ | |
cdc97505 | 89 | static DEFINE_SPINLOCK(state_lock); |
8b671b80 | 90 | |
4f34bd05 AE |
91 | enum nfsd4_st_mutex_lock_subclass { |
92 | OPEN_STATEID_MUTEX = 0, | |
93 | LOCK_STATEID_MUTEX = 1, | |
94 | }; | |
95 | ||
b401be22 JL |
96 | /* |
97 | * A waitqueue for all in-progress 4.0 CLOSE operations that are waiting for | |
98 | * the refcount on the open stateid to drop. | |
99 | */ | |
100 | static DECLARE_WAIT_QUEUE_HEAD(close_wq); | |
101 | ||
9258a2d5 | 102 | static struct kmem_cache *client_slab; |
abf1135b CH |
103 | static struct kmem_cache *openowner_slab; |
104 | static struct kmem_cache *lockowner_slab; | |
105 | static struct kmem_cache *file_slab; | |
106 | static struct kmem_cache *stateid_slab; | |
107 | static struct kmem_cache *deleg_slab; | |
8287f009 | 108 | static struct kmem_cache *odstate_slab; |
e60d4398 | 109 | |
66b2b9b2 | 110 | static void free_session(struct nfsd4_session *); |
508dc6e1 | 111 | |
c4cb8974 | 112 | static const struct nfsd4_callback_ops nfsd4_cb_recall_ops; |
76d348fa | 113 | static const struct nfsd4_callback_ops nfsd4_cb_notify_lock_ops; |
0162ac2b | 114 | |
f0f51f5c | 115 | static bool is_session_dead(struct nfsd4_session *ses) |
66b2b9b2 | 116 | { |
f0f51f5c | 117 | return ses->se_flags & NFS4_SESSION_DEAD; |
66b2b9b2 BF |
118 | } |
119 | ||
f0f51f5c | 120 | static __be32 mark_session_dead_locked(struct nfsd4_session *ses, int ref_held_by_me) |
508dc6e1 | 121 | { |
f0f51f5c | 122 | if (atomic_read(&ses->se_ref) > ref_held_by_me) |
66b2b9b2 BF |
123 | return nfserr_jukebox; |
124 | ses->se_flags |= NFS4_SESSION_DEAD; | |
125 | return nfs_ok; | |
508dc6e1 BH |
126 | } |
127 | ||
221a6876 BF |
128 | static bool is_client_expired(struct nfs4_client *clp) |
129 | { | |
130 | return clp->cl_time == 0; | |
131 | } | |
132 | ||
221a6876 BF |
133 | static __be32 get_client_locked(struct nfs4_client *clp) |
134 | { | |
0a880a28 TM |
135 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
136 | ||
137 | lockdep_assert_held(&nn->client_lock); | |
138 | ||
221a6876 BF |
139 | if (is_client_expired(clp)) |
140 | return nfserr_expired; | |
141 | atomic_inc(&clp->cl_refcount); | |
142 | return nfs_ok; | |
143 | } | |
144 | ||
145 | /* must be called under the client_lock */ | |
146 | static inline void | |
147 | renew_client_locked(struct nfs4_client *clp) | |
148 | { | |
149 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
150 | ||
151 | if (is_client_expired(clp)) { | |
152 | WARN_ON(1); | |
153 | printk("%s: client (clientid %08x/%08x) already expired\n", | |
154 | __func__, | |
155 | clp->cl_clientid.cl_boot, | |
156 | clp->cl_clientid.cl_id); | |
157 | return; | |
158 | } | |
159 | ||
160 | dprintk("renewing client (clientid %08x/%08x)\n", | |
161 | clp->cl_clientid.cl_boot, | |
162 | clp->cl_clientid.cl_id); | |
163 | list_move_tail(&clp->cl_lru, &nn->client_lru); | |
164 | clp->cl_time = get_seconds(); | |
165 | } | |
166 | ||
ba138435 | 167 | static void put_client_renew_locked(struct nfs4_client *clp) |
221a6876 | 168 | { |
0a880a28 TM |
169 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
170 | ||
171 | lockdep_assert_held(&nn->client_lock); | |
172 | ||
221a6876 BF |
173 | if (!atomic_dec_and_test(&clp->cl_refcount)) |
174 | return; | |
175 | if (!is_client_expired(clp)) | |
176 | renew_client_locked(clp); | |
177 | } | |
178 | ||
4b24ca7d JL |
179 | static void put_client_renew(struct nfs4_client *clp) |
180 | { | |
181 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
182 | ||
d6c249b4 JL |
183 | if (!atomic_dec_and_lock(&clp->cl_refcount, &nn->client_lock)) |
184 | return; | |
185 | if (!is_client_expired(clp)) | |
186 | renew_client_locked(clp); | |
4b24ca7d JL |
187 | spin_unlock(&nn->client_lock); |
188 | } | |
189 | ||
d4e19e70 TM |
190 | static __be32 nfsd4_get_session_locked(struct nfsd4_session *ses) |
191 | { | |
192 | __be32 status; | |
193 | ||
194 | if (is_session_dead(ses)) | |
195 | return nfserr_badsession; | |
196 | status = get_client_locked(ses->se_client); | |
197 | if (status) | |
198 | return status; | |
199 | atomic_inc(&ses->se_ref); | |
200 | return nfs_ok; | |
201 | } | |
202 | ||
203 | static void nfsd4_put_session_locked(struct nfsd4_session *ses) | |
204 | { | |
205 | struct nfs4_client *clp = ses->se_client; | |
0a880a28 TM |
206 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
207 | ||
208 | lockdep_assert_held(&nn->client_lock); | |
d4e19e70 TM |
209 | |
210 | if (atomic_dec_and_test(&ses->se_ref) && is_session_dead(ses)) | |
211 | free_session(ses); | |
212 | put_client_renew_locked(clp); | |
213 | } | |
214 | ||
215 | static void nfsd4_put_session(struct nfsd4_session *ses) | |
216 | { | |
217 | struct nfs4_client *clp = ses->se_client; | |
218 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
219 | ||
220 | spin_lock(&nn->client_lock); | |
221 | nfsd4_put_session_locked(ses); | |
222 | spin_unlock(&nn->client_lock); | |
223 | } | |
224 | ||
76d348fa JL |
225 | static struct nfsd4_blocked_lock * |
226 | find_blocked_lock(struct nfs4_lockowner *lo, struct knfsd_fh *fh, | |
227 | struct nfsd_net *nn) | |
228 | { | |
229 | struct nfsd4_blocked_lock *cur, *found = NULL; | |
230 | ||
0cc11a61 | 231 | spin_lock(&nn->blocked_locks_lock); |
76d348fa JL |
232 | list_for_each_entry(cur, &lo->lo_blocked, nbl_list) { |
233 | if (fh_match(fh, &cur->nbl_fh)) { | |
234 | list_del_init(&cur->nbl_list); | |
7919d0a2 | 235 | list_del_init(&cur->nbl_lru); |
76d348fa JL |
236 | found = cur; |
237 | break; | |
238 | } | |
239 | } | |
0cc11a61 | 240 | spin_unlock(&nn->blocked_locks_lock); |
76d348fa | 241 | if (found) |
cb03f94f | 242 | locks_delete_block(&found->nbl_lock); |
76d348fa JL |
243 | return found; |
244 | } | |
245 | ||
246 | static struct nfsd4_blocked_lock * | |
247 | find_or_allocate_block(struct nfs4_lockowner *lo, struct knfsd_fh *fh, | |
248 | struct nfsd_net *nn) | |
249 | { | |
250 | struct nfsd4_blocked_lock *nbl; | |
251 | ||
252 | nbl = find_blocked_lock(lo, fh, nn); | |
253 | if (!nbl) { | |
254 | nbl= kmalloc(sizeof(*nbl), GFP_KERNEL); | |
255 | if (nbl) { | |
256 | fh_copy_shallow(&nbl->nbl_fh, fh); | |
257 | locks_init_lock(&nbl->nbl_lock); | |
258 | nfsd4_init_cb(&nbl->nbl_cb, lo->lo_owner.so_client, | |
259 | &nfsd4_cb_notify_lock_ops, | |
260 | NFSPROC4_CLNT_CB_NOTIFY_LOCK); | |
261 | } | |
262 | } | |
263 | return nbl; | |
264 | } | |
265 | ||
266 | static void | |
267 | free_blocked_lock(struct nfsd4_blocked_lock *nbl) | |
268 | { | |
6aaafc43 | 269 | locks_delete_block(&nbl->nbl_lock); |
76d348fa JL |
270 | locks_release_private(&nbl->nbl_lock); |
271 | kfree(nbl); | |
272 | } | |
273 | ||
68ef3bc3 JL |
274 | static void |
275 | remove_blocked_locks(struct nfs4_lockowner *lo) | |
276 | { | |
277 | struct nfs4_client *clp = lo->lo_owner.so_client; | |
278 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
279 | struct nfsd4_blocked_lock *nbl; | |
280 | LIST_HEAD(reaplist); | |
281 | ||
282 | /* Dequeue all blocked locks */ | |
283 | spin_lock(&nn->blocked_locks_lock); | |
284 | while (!list_empty(&lo->lo_blocked)) { | |
285 | nbl = list_first_entry(&lo->lo_blocked, | |
286 | struct nfsd4_blocked_lock, | |
287 | nbl_list); | |
288 | list_del_init(&nbl->nbl_list); | |
289 | list_move(&nbl->nbl_lru, &reaplist); | |
290 | } | |
291 | spin_unlock(&nn->blocked_locks_lock); | |
292 | ||
293 | /* Now free them */ | |
294 | while (!list_empty(&reaplist)) { | |
295 | nbl = list_first_entry(&reaplist, struct nfsd4_blocked_lock, | |
296 | nbl_lru); | |
297 | list_del_init(&nbl->nbl_lru); | |
68ef3bc3 JL |
298 | free_blocked_lock(nbl); |
299 | } | |
300 | } | |
301 | ||
f456458e JL |
302 | static void |
303 | nfsd4_cb_notify_lock_prepare(struct nfsd4_callback *cb) | |
304 | { | |
305 | struct nfsd4_blocked_lock *nbl = container_of(cb, | |
306 | struct nfsd4_blocked_lock, nbl_cb); | |
307 | locks_delete_block(&nbl->nbl_lock); | |
308 | } | |
309 | ||
76d348fa JL |
310 | static int |
311 | nfsd4_cb_notify_lock_done(struct nfsd4_callback *cb, struct rpc_task *task) | |
312 | { | |
313 | /* | |
314 | * Since this is just an optimization, we don't try very hard if it | |
315 | * turns out not to succeed. We'll requeue it on NFS4ERR_DELAY, and | |
316 | * just quit trying on anything else. | |
317 | */ | |
318 | switch (task->tk_status) { | |
319 | case -NFS4ERR_DELAY: | |
320 | rpc_delay(task, 1 * HZ); | |
321 | return 0; | |
322 | default: | |
323 | return 1; | |
324 | } | |
325 | } | |
326 | ||
327 | static void | |
328 | nfsd4_cb_notify_lock_release(struct nfsd4_callback *cb) | |
329 | { | |
330 | struct nfsd4_blocked_lock *nbl = container_of(cb, | |
331 | struct nfsd4_blocked_lock, nbl_cb); | |
332 | ||
333 | free_blocked_lock(nbl); | |
334 | } | |
335 | ||
336 | static const struct nfsd4_callback_ops nfsd4_cb_notify_lock_ops = { | |
f456458e | 337 | .prepare = nfsd4_cb_notify_lock_prepare, |
76d348fa JL |
338 | .done = nfsd4_cb_notify_lock_done, |
339 | .release = nfsd4_cb_notify_lock_release, | |
340 | }; | |
341 | ||
b5971afa KM |
342 | static inline struct nfs4_stateowner * |
343 | nfs4_get_stateowner(struct nfs4_stateowner *sop) | |
344 | { | |
345 | atomic_inc(&sop->so_count); | |
346 | return sop; | |
347 | } | |
348 | ||
7ffb5880 | 349 | static int |
d4f0489f | 350 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner) |
7ffb5880 TM |
351 | { |
352 | return (sop->so_owner.len == owner->len) && | |
d4f0489f | 353 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len); |
7ffb5880 TM |
354 | } |
355 | ||
356 | static struct nfs4_openowner * | |
357 | find_openstateowner_str_locked(unsigned int hashval, struct nfsd4_open *open, | |
d4f0489f | 358 | struct nfs4_client *clp) |
7ffb5880 TM |
359 | { |
360 | struct nfs4_stateowner *so; | |
7ffb5880 | 361 | |
d4f0489f | 362 | lockdep_assert_held(&clp->cl_lock); |
7ffb5880 | 363 | |
d4f0489f TM |
364 | list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[hashval], |
365 | so_strhash) { | |
7ffb5880 TM |
366 | if (!so->so_is_open_owner) |
367 | continue; | |
b5971afa KM |
368 | if (same_owner_str(so, &open->op_owner)) |
369 | return openowner(nfs4_get_stateowner(so)); | |
7ffb5880 TM |
370 | } |
371 | return NULL; | |
372 | } | |
373 | ||
374 | static struct nfs4_openowner * | |
375 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, | |
d4f0489f | 376 | struct nfs4_client *clp) |
7ffb5880 TM |
377 | { |
378 | struct nfs4_openowner *oo; | |
379 | ||
d4f0489f TM |
380 | spin_lock(&clp->cl_lock); |
381 | oo = find_openstateowner_str_locked(hashval, open, clp); | |
382 | spin_unlock(&clp->cl_lock); | |
7ffb5880 TM |
383 | return oo; |
384 | } | |
385 | ||
1da177e4 LT |
386 | static inline u32 |
387 | opaque_hashval(const void *ptr, int nbytes) | |
388 | { | |
389 | unsigned char *cptr = (unsigned char *) ptr; | |
390 | ||
391 | u32 x = 0; | |
392 | while (nbytes--) { | |
393 | x *= 37; | |
394 | x += *cptr++; | |
395 | } | |
396 | return x; | |
397 | } | |
398 | ||
5b095e99 | 399 | static void nfsd4_free_file_rcu(struct rcu_head *rcu) |
32513b40 | 400 | { |
5b095e99 JL |
401 | struct nfs4_file *fp = container_of(rcu, struct nfs4_file, fi_rcu); |
402 | ||
403 | kmem_cache_free(file_slab, fp); | |
32513b40 BF |
404 | } |
405 | ||
e6ba76e1 | 406 | void |
13cd2184 N |
407 | put_nfs4_file(struct nfs4_file *fi) |
408 | { | |
02e1215f JL |
409 | might_lock(&state_lock); |
410 | ||
818a34eb | 411 | if (refcount_dec_and_lock(&fi->fi_ref, &state_lock)) { |
5b095e99 | 412 | hlist_del_rcu(&fi->fi_hash); |
cdc97505 | 413 | spin_unlock(&state_lock); |
8287f009 | 414 | WARN_ON_ONCE(!list_empty(&fi->fi_clnt_odstate)); |
5b095e99 JL |
415 | WARN_ON_ONCE(!list_empty(&fi->fi_delegations)); |
416 | call_rcu(&fi->fi_rcu, nfsd4_free_file_rcu); | |
8b671b80 | 417 | } |
13cd2184 N |
418 | } |
419 | ||
de18643d TM |
420 | static struct file * |
421 | __nfs4_get_fd(struct nfs4_file *f, int oflag) | |
422 | { | |
423 | if (f->fi_fds[oflag]) | |
424 | return get_file(f->fi_fds[oflag]); | |
425 | return NULL; | |
426 | } | |
427 | ||
428 | static struct file * | |
429 | find_writeable_file_locked(struct nfs4_file *f) | |
430 | { | |
431 | struct file *ret; | |
432 | ||
433 | lockdep_assert_held(&f->fi_lock); | |
434 | ||
435 | ret = __nfs4_get_fd(f, O_WRONLY); | |
436 | if (!ret) | |
437 | ret = __nfs4_get_fd(f, O_RDWR); | |
438 | return ret; | |
439 | } | |
440 | ||
441 | static struct file * | |
442 | find_writeable_file(struct nfs4_file *f) | |
443 | { | |
444 | struct file *ret; | |
445 | ||
446 | spin_lock(&f->fi_lock); | |
447 | ret = find_writeable_file_locked(f); | |
448 | spin_unlock(&f->fi_lock); | |
449 | ||
450 | return ret; | |
451 | } | |
452 | ||
453 | static struct file *find_readable_file_locked(struct nfs4_file *f) | |
454 | { | |
455 | struct file *ret; | |
456 | ||
457 | lockdep_assert_held(&f->fi_lock); | |
458 | ||
459 | ret = __nfs4_get_fd(f, O_RDONLY); | |
460 | if (!ret) | |
461 | ret = __nfs4_get_fd(f, O_RDWR); | |
462 | return ret; | |
463 | } | |
464 | ||
465 | static struct file * | |
466 | find_readable_file(struct nfs4_file *f) | |
467 | { | |
468 | struct file *ret; | |
469 | ||
470 | spin_lock(&f->fi_lock); | |
471 | ret = find_readable_file_locked(f); | |
472 | spin_unlock(&f->fi_lock); | |
473 | ||
474 | return ret; | |
475 | } | |
476 | ||
4d227fca | 477 | struct file * |
de18643d TM |
478 | find_any_file(struct nfs4_file *f) |
479 | { | |
480 | struct file *ret; | |
481 | ||
482 | spin_lock(&f->fi_lock); | |
483 | ret = __nfs4_get_fd(f, O_RDWR); | |
484 | if (!ret) { | |
485 | ret = __nfs4_get_fd(f, O_WRONLY); | |
486 | if (!ret) | |
487 | ret = __nfs4_get_fd(f, O_RDONLY); | |
488 | } | |
489 | spin_unlock(&f->fi_lock); | |
490 | return ret; | |
491 | } | |
492 | ||
02a3508d | 493 | static atomic_long_t num_delegations; |
697ce9be | 494 | unsigned long max_delegations; |
ef0f3390 N |
495 | |
496 | /* | |
497 | * Open owner state (share locks) | |
498 | */ | |
499 | ||
16bfdaaf BF |
500 | /* hash tables for lock and open owners */ |
501 | #define OWNER_HASH_BITS 8 | |
502 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
503 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
ef0f3390 | 504 | |
d4f0489f | 505 | static unsigned int ownerstr_hashval(struct xdr_netobj *ownername) |
ddc04c41 BF |
506 | { |
507 | unsigned int ret; | |
508 | ||
509 | ret = opaque_hashval(ownername->data, ownername->len); | |
16bfdaaf | 510 | return ret & OWNER_HASH_MASK; |
ddc04c41 | 511 | } |
ef0f3390 | 512 | |
ef0f3390 N |
513 | /* hash table for nfs4_file */ |
514 | #define FILE_HASH_BITS 8 | |
515 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
35079582 | 516 | |
ca943217 | 517 | static unsigned int nfsd_fh_hashval(struct knfsd_fh *fh) |
ddc04c41 | 518 | { |
ca943217 TM |
519 | return jhash2(fh->fh_base.fh_pad, XDR_QUADLEN(fh->fh_size), 0); |
520 | } | |
521 | ||
522 | static unsigned int file_hashval(struct knfsd_fh *fh) | |
523 | { | |
524 | return nfsd_fh_hashval(fh) & (FILE_HASH_SIZE - 1); | |
525 | } | |
526 | ||
89876f8c | 527 | static struct hlist_head file_hashtbl[FILE_HASH_SIZE]; |
ef0f3390 | 528 | |
12659651 JL |
529 | static void |
530 | __nfs4_file_get_access(struct nfs4_file *fp, u32 access) | |
3477565e | 531 | { |
7214e860 JL |
532 | lockdep_assert_held(&fp->fi_lock); |
533 | ||
12659651 JL |
534 | if (access & NFS4_SHARE_ACCESS_WRITE) |
535 | atomic_inc(&fp->fi_access[O_WRONLY]); | |
536 | if (access & NFS4_SHARE_ACCESS_READ) | |
537 | atomic_inc(&fp->fi_access[O_RDONLY]); | |
3477565e BF |
538 | } |
539 | ||
12659651 JL |
540 | static __be32 |
541 | nfs4_file_get_access(struct nfs4_file *fp, u32 access) | |
998db52c | 542 | { |
7214e860 JL |
543 | lockdep_assert_held(&fp->fi_lock); |
544 | ||
12659651 JL |
545 | /* Does this access mode make sense? */ |
546 | if (access & ~NFS4_SHARE_ACCESS_BOTH) | |
547 | return nfserr_inval; | |
548 | ||
baeb4ff0 JL |
549 | /* Does it conflict with a deny mode already set? */ |
550 | if ((access & fp->fi_share_deny) != 0) | |
551 | return nfserr_share_denied; | |
552 | ||
12659651 JL |
553 | __nfs4_file_get_access(fp, access); |
554 | return nfs_ok; | |
998db52c BF |
555 | } |
556 | ||
baeb4ff0 JL |
557 | static __be32 nfs4_file_check_deny(struct nfs4_file *fp, u32 deny) |
558 | { | |
559 | /* Common case is that there is no deny mode. */ | |
560 | if (deny) { | |
561 | /* Does this deny mode make sense? */ | |
562 | if (deny & ~NFS4_SHARE_DENY_BOTH) | |
563 | return nfserr_inval; | |
564 | ||
565 | if ((deny & NFS4_SHARE_DENY_READ) && | |
566 | atomic_read(&fp->fi_access[O_RDONLY])) | |
567 | return nfserr_share_denied; | |
568 | ||
569 | if ((deny & NFS4_SHARE_DENY_WRITE) && | |
570 | atomic_read(&fp->fi_access[O_WRONLY])) | |
571 | return nfserr_share_denied; | |
572 | } | |
573 | return nfs_ok; | |
574 | } | |
575 | ||
998db52c | 576 | static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
f9d7562f | 577 | { |
de18643d TM |
578 | might_lock(&fp->fi_lock); |
579 | ||
580 | if (atomic_dec_and_lock(&fp->fi_access[oflag], &fp->fi_lock)) { | |
581 | struct file *f1 = NULL; | |
582 | struct file *f2 = NULL; | |
583 | ||
6d338b51 | 584 | swap(f1, fp->fi_fds[oflag]); |
0c7c3e67 | 585 | if (atomic_read(&fp->fi_access[1 - oflag]) == 0) |
6d338b51 | 586 | swap(f2, fp->fi_fds[O_RDWR]); |
de18643d TM |
587 | spin_unlock(&fp->fi_lock); |
588 | if (f1) | |
589 | fput(f1); | |
590 | if (f2) | |
591 | fput(f2); | |
f9d7562f BF |
592 | } |
593 | } | |
594 | ||
12659651 | 595 | static void nfs4_file_put_access(struct nfs4_file *fp, u32 access) |
998db52c | 596 | { |
12659651 JL |
597 | WARN_ON_ONCE(access & ~NFS4_SHARE_ACCESS_BOTH); |
598 | ||
599 | if (access & NFS4_SHARE_ACCESS_WRITE) | |
998db52c | 600 | __nfs4_file_put_access(fp, O_WRONLY); |
12659651 JL |
601 | if (access & NFS4_SHARE_ACCESS_READ) |
602 | __nfs4_file_put_access(fp, O_RDONLY); | |
998db52c BF |
603 | } |
604 | ||
8287f009 SB |
605 | /* |
606 | * Allocate a new open/delegation state counter. This is needed for | |
607 | * pNFS for proper return on close semantics. | |
608 | * | |
609 | * Note that we only allocate it for pNFS-enabled exports, otherwise | |
610 | * all pointers to struct nfs4_clnt_odstate are always NULL. | |
611 | */ | |
612 | static struct nfs4_clnt_odstate * | |
613 | alloc_clnt_odstate(struct nfs4_client *clp) | |
614 | { | |
615 | struct nfs4_clnt_odstate *co; | |
616 | ||
617 | co = kmem_cache_zalloc(odstate_slab, GFP_KERNEL); | |
618 | if (co) { | |
619 | co->co_client = clp; | |
cff7cb2e | 620 | refcount_set(&co->co_odcount, 1); |
8287f009 SB |
621 | } |
622 | return co; | |
623 | } | |
624 | ||
625 | static void | |
626 | hash_clnt_odstate_locked(struct nfs4_clnt_odstate *co) | |
627 | { | |
628 | struct nfs4_file *fp = co->co_file; | |
629 | ||
630 | lockdep_assert_held(&fp->fi_lock); | |
631 | list_add(&co->co_perfile, &fp->fi_clnt_odstate); | |
632 | } | |
633 | ||
634 | static inline void | |
635 | get_clnt_odstate(struct nfs4_clnt_odstate *co) | |
636 | { | |
637 | if (co) | |
cff7cb2e | 638 | refcount_inc(&co->co_odcount); |
8287f009 SB |
639 | } |
640 | ||
641 | static void | |
642 | put_clnt_odstate(struct nfs4_clnt_odstate *co) | |
643 | { | |
644 | struct nfs4_file *fp; | |
645 | ||
646 | if (!co) | |
647 | return; | |
648 | ||
649 | fp = co->co_file; | |
cff7cb2e | 650 | if (refcount_dec_and_lock(&co->co_odcount, &fp->fi_lock)) { |
8287f009 SB |
651 | list_del(&co->co_perfile); |
652 | spin_unlock(&fp->fi_lock); | |
653 | ||
654 | nfsd4_return_all_file_layouts(co->co_client, fp); | |
655 | kmem_cache_free(odstate_slab, co); | |
656 | } | |
657 | } | |
658 | ||
659 | static struct nfs4_clnt_odstate * | |
660 | find_or_hash_clnt_odstate(struct nfs4_file *fp, struct nfs4_clnt_odstate *new) | |
661 | { | |
662 | struct nfs4_clnt_odstate *co; | |
663 | struct nfs4_client *cl; | |
664 | ||
665 | if (!new) | |
666 | return NULL; | |
667 | ||
668 | cl = new->co_client; | |
669 | ||
670 | spin_lock(&fp->fi_lock); | |
671 | list_for_each_entry(co, &fp->fi_clnt_odstate, co_perfile) { | |
672 | if (co->co_client == cl) { | |
673 | get_clnt_odstate(co); | |
674 | goto out; | |
675 | } | |
676 | } | |
677 | co = new; | |
678 | co->co_file = fp; | |
679 | hash_clnt_odstate_locked(new); | |
680 | out: | |
681 | spin_unlock(&fp->fi_lock); | |
682 | return co; | |
683 | } | |
684 | ||
d19fb70d KM |
685 | struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct kmem_cache *slab, |
686 | void (*sc_free)(struct nfs4_stid *)) | |
2a74aba7 | 687 | { |
3abdb607 | 688 | struct nfs4_stid *stid; |
6136d2b4 | 689 | int new_id; |
2a74aba7 | 690 | |
f8338834 | 691 | stid = kmem_cache_zalloc(slab, GFP_KERNEL); |
3abdb607 BF |
692 | if (!stid) |
693 | return NULL; | |
694 | ||
4770d722 JL |
695 | idr_preload(GFP_KERNEL); |
696 | spin_lock(&cl->cl_lock); | |
697 | new_id = idr_alloc_cyclic(&cl->cl_stateids, stid, 0, 0, GFP_NOWAIT); | |
698 | spin_unlock(&cl->cl_lock); | |
699 | idr_preload_end(); | |
ebd6c707 | 700 | if (new_id < 0) |
3abdb607 | 701 | goto out_free; |
d19fb70d KM |
702 | |
703 | stid->sc_free = sc_free; | |
2a74aba7 | 704 | stid->sc_client = cl; |
3abdb607 BF |
705 | stid->sc_stateid.si_opaque.so_id = new_id; |
706 | stid->sc_stateid.si_opaque.so_clid = cl->cl_clientid; | |
2a74aba7 | 707 | /* Will be incremented before return to client: */ |
a15dfcd5 | 708 | refcount_set(&stid->sc_count, 1); |
9767feb2 | 709 | spin_lock_init(&stid->sc_lock); |
996e0938 | 710 | |
996e0938 | 711 | /* |
3abdb607 BF |
712 | * It shouldn't be a problem to reuse an opaque stateid value. |
713 | * I don't think it is for 4.1. But with 4.0 I worry that, for | |
714 | * example, a stray write retransmission could be accepted by | |
715 | * the server when it should have been rejected. Therefore, | |
716 | * adopt a trick from the sctp code to attempt to maximize the | |
717 | * amount of time until an id is reused, by ensuring they always | |
718 | * "increase" (mod INT_MAX): | |
996e0938 | 719 | */ |
3abdb607 BF |
720 | return stid; |
721 | out_free: | |
2c44a234 | 722 | kmem_cache_free(slab, stid); |
3abdb607 | 723 | return NULL; |
2a74aba7 BF |
724 | } |
725 | ||
e0639dc5 OK |
726 | /* |
727 | * Create a unique stateid_t to represent each COPY. | |
728 | */ | |
729 | int nfs4_init_cp_state(struct nfsd_net *nn, struct nfsd4_copy *copy) | |
730 | { | |
731 | int new_id; | |
732 | ||
733 | idr_preload(GFP_KERNEL); | |
734 | spin_lock(&nn->s2s_cp_lock); | |
735 | new_id = idr_alloc_cyclic(&nn->s2s_cp_stateids, copy, 0, 0, GFP_NOWAIT); | |
736 | spin_unlock(&nn->s2s_cp_lock); | |
737 | idr_preload_end(); | |
738 | if (new_id < 0) | |
739 | return 0; | |
740 | copy->cp_stateid.si_opaque.so_id = new_id; | |
741 | copy->cp_stateid.si_opaque.so_clid.cl_boot = nn->boot_time; | |
742 | copy->cp_stateid.si_opaque.so_clid.cl_id = nn->s2s_cp_cl_id; | |
743 | return 1; | |
744 | } | |
745 | ||
746 | void nfs4_free_cp_state(struct nfsd4_copy *copy) | |
747 | { | |
748 | struct nfsd_net *nn; | |
749 | ||
750 | nn = net_generic(copy->cp_clp->net, nfsd_net_id); | |
751 | spin_lock(&nn->s2s_cp_lock); | |
752 | idr_remove(&nn->s2s_cp_stateids, copy->cp_stateid.si_opaque.so_id); | |
753 | spin_unlock(&nn->s2s_cp_lock); | |
754 | } | |
755 | ||
b49e084d | 756 | static struct nfs4_ol_stateid * nfs4_alloc_open_stateid(struct nfs4_client *clp) |
4cdc951b | 757 | { |
6011695d | 758 | struct nfs4_stid *stid; |
6011695d | 759 | |
d19fb70d | 760 | stid = nfs4_alloc_stid(clp, stateid_slab, nfs4_free_ol_stateid); |
6011695d TM |
761 | if (!stid) |
762 | return NULL; | |
763 | ||
d19fb70d | 764 | return openlockstateid(stid); |
6011695d TM |
765 | } |
766 | ||
767 | static void nfs4_free_deleg(struct nfs4_stid *stid) | |
768 | { | |
6011695d TM |
769 | kmem_cache_free(deleg_slab, stid); |
770 | atomic_long_dec(&num_delegations); | |
4cdc951b BF |
771 | } |
772 | ||
6282cd56 N |
773 | /* |
774 | * When we recall a delegation, we should be careful not to hand it | |
775 | * out again straight away. | |
776 | * To ensure this we keep a pair of bloom filters ('new' and 'old') | |
777 | * in which the filehandles of recalled delegations are "stored". | |
778 | * If a filehandle appear in either filter, a delegation is blocked. | |
779 | * When a delegation is recalled, the filehandle is stored in the "new" | |
780 | * filter. | |
781 | * Every 30 seconds we swap the filters and clear the "new" one, | |
782 | * unless both are empty of course. | |
783 | * | |
784 | * Each filter is 256 bits. We hash the filehandle to 32bit and use the | |
785 | * low 3 bytes as hash-table indices. | |
786 | * | |
f54fe962 | 787 | * 'blocked_delegations_lock', which is always taken in block_delegations(), |
6282cd56 N |
788 | * is used to manage concurrent access. Testing does not need the lock |
789 | * except when swapping the two filters. | |
790 | */ | |
f54fe962 | 791 | static DEFINE_SPINLOCK(blocked_delegations_lock); |
6282cd56 N |
792 | static struct bloom_pair { |
793 | int entries, old_entries; | |
794 | time_t swap_time; | |
795 | int new; /* index into 'set' */ | |
796 | DECLARE_BITMAP(set[2], 256); | |
797 | } blocked_delegations; | |
798 | ||
799 | static int delegation_blocked(struct knfsd_fh *fh) | |
800 | { | |
801 | u32 hash; | |
802 | struct bloom_pair *bd = &blocked_delegations; | |
803 | ||
804 | if (bd->entries == 0) | |
805 | return 0; | |
806 | if (seconds_since_boot() - bd->swap_time > 30) { | |
f54fe962 | 807 | spin_lock(&blocked_delegations_lock); |
6282cd56 N |
808 | if (seconds_since_boot() - bd->swap_time > 30) { |
809 | bd->entries -= bd->old_entries; | |
810 | bd->old_entries = bd->entries; | |
811 | memset(bd->set[bd->new], 0, | |
812 | sizeof(bd->set[0])); | |
813 | bd->new = 1-bd->new; | |
814 | bd->swap_time = seconds_since_boot(); | |
815 | } | |
f54fe962 | 816 | spin_unlock(&blocked_delegations_lock); |
6282cd56 | 817 | } |
87545899 | 818 | hash = jhash(&fh->fh_base, fh->fh_size, 0); |
6282cd56 N |
819 | if (test_bit(hash&255, bd->set[0]) && |
820 | test_bit((hash>>8)&255, bd->set[0]) && | |
821 | test_bit((hash>>16)&255, bd->set[0])) | |
822 | return 1; | |
823 | ||
824 | if (test_bit(hash&255, bd->set[1]) && | |
825 | test_bit((hash>>8)&255, bd->set[1]) && | |
826 | test_bit((hash>>16)&255, bd->set[1])) | |
827 | return 1; | |
828 | ||
829 | return 0; | |
830 | } | |
831 | ||
832 | static void block_delegations(struct knfsd_fh *fh) | |
833 | { | |
834 | u32 hash; | |
835 | struct bloom_pair *bd = &blocked_delegations; | |
836 | ||
87545899 | 837 | hash = jhash(&fh->fh_base, fh->fh_size, 0); |
6282cd56 | 838 | |
f54fe962 | 839 | spin_lock(&blocked_delegations_lock); |
6282cd56 N |
840 | __set_bit(hash&255, bd->set[bd->new]); |
841 | __set_bit((hash>>8)&255, bd->set[bd->new]); | |
842 | __set_bit((hash>>16)&255, bd->set[bd->new]); | |
843 | if (bd->entries == 0) | |
844 | bd->swap_time = seconds_since_boot(); | |
845 | bd->entries += 1; | |
f54fe962 | 846 | spin_unlock(&blocked_delegations_lock); |
6282cd56 N |
847 | } |
848 | ||
1da177e4 | 849 | static struct nfs4_delegation * |
86d29b10 BF |
850 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_file *fp, |
851 | struct svc_fh *current_fh, | |
8287f009 | 852 | struct nfs4_clnt_odstate *odstate) |
1da177e4 LT |
853 | { |
854 | struct nfs4_delegation *dp; | |
02a3508d | 855 | long n; |
1da177e4 LT |
856 | |
857 | dprintk("NFSD alloc_init_deleg\n"); | |
02a3508d TM |
858 | n = atomic_long_inc_return(&num_delegations); |
859 | if (n < 0 || n > max_delegations) | |
860 | goto out_dec; | |
6282cd56 | 861 | if (delegation_blocked(¤t_fh->fh_handle)) |
02a3508d | 862 | goto out_dec; |
d19fb70d | 863 | dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab, nfs4_free_deleg)); |
5b2d21c1 | 864 | if (dp == NULL) |
02a3508d | 865 | goto out_dec; |
6011695d | 866 | |
2a74aba7 BF |
867 | /* |
868 | * delegation seqid's are never incremented. The 4.1 special | |
6136d2b4 BF |
869 | * meaning of seqid 0 isn't meaningful, really, but let's avoid |
870 | * 0 anyway just for consistency and use 1: | |
2a74aba7 BF |
871 | */ |
872 | dp->dl_stid.sc_stateid.si_generation = 1; | |
ea1da636 N |
873 | INIT_LIST_HEAD(&dp->dl_perfile); |
874 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 | 875 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
8287f009 SB |
876 | dp->dl_clnt_odstate = odstate; |
877 | get_clnt_odstate(odstate); | |
99c41515 | 878 | dp->dl_type = NFS4_OPEN_DELEGATE_READ; |
f0b5de1b CH |
879 | dp->dl_retries = 1; |
880 | nfsd4_init_cb(&dp->dl_recall, dp->dl_stid.sc_client, | |
0162ac2b | 881 | &nfsd4_cb_recall_ops, NFSPROC4_CLNT_CB_RECALL); |
86d29b10 BF |
882 | get_nfs4_file(fp); |
883 | dp->dl_stid.sc_file = fp; | |
1da177e4 | 884 | return dp; |
02a3508d TM |
885 | out_dec: |
886 | atomic_long_dec(&num_delegations); | |
887 | return NULL; | |
1da177e4 LT |
888 | } |
889 | ||
890 | void | |
6011695d | 891 | nfs4_put_stid(struct nfs4_stid *s) |
1da177e4 | 892 | { |
11b9164a | 893 | struct nfs4_file *fp = s->sc_file; |
6011695d TM |
894 | struct nfs4_client *clp = s->sc_client; |
895 | ||
4770d722 JL |
896 | might_lock(&clp->cl_lock); |
897 | ||
a15dfcd5 | 898 | if (!refcount_dec_and_lock(&s->sc_count, &clp->cl_lock)) { |
b401be22 | 899 | wake_up_all(&close_wq); |
6011695d | 900 | return; |
b401be22 | 901 | } |
6011695d | 902 | idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id); |
4770d722 | 903 | spin_unlock(&clp->cl_lock); |
6011695d | 904 | s->sc_free(s); |
11b9164a TM |
905 | if (fp) |
906 | put_nfs4_file(fp); | |
1da177e4 LT |
907 | } |
908 | ||
9767feb2 JL |
909 | void |
910 | nfs4_inc_and_copy_stateid(stateid_t *dst, struct nfs4_stid *stid) | |
911 | { | |
912 | stateid_t *src = &stid->sc_stateid; | |
913 | ||
914 | spin_lock(&stid->sc_lock); | |
915 | if (unlikely(++src->si_generation == 0)) | |
916 | src->si_generation = 1; | |
917 | memcpy(dst, src, sizeof(*dst)); | |
918 | spin_unlock(&stid->sc_lock); | |
919 | } | |
920 | ||
353601e7 | 921 | static void put_deleg_file(struct nfs4_file *fp) |
1da177e4 | 922 | { |
6bcc034e | 923 | struct file *filp = NULL; |
b8232d33 | 924 | |
6bcc034e | 925 | spin_lock(&fp->fi_lock); |
353601e7 | 926 | if (--fp->fi_delegees == 0) |
6bcc034e | 927 | swap(filp, fp->fi_deleg_file); |
6bcc034e JL |
928 | spin_unlock(&fp->fi_lock); |
929 | ||
353601e7 | 930 | if (filp) |
6bcc034e | 931 | fput(filp); |
353601e7 BF |
932 | } |
933 | ||
934 | static void nfs4_unlock_deleg_lease(struct nfs4_delegation *dp) | |
935 | { | |
936 | struct nfs4_file *fp = dp->dl_stid.sc_file; | |
937 | struct file *filp = fp->fi_deleg_file; | |
938 | ||
939 | WARN_ON_ONCE(!fp->fi_delegees); | |
940 | ||
941 | vfs_setlease(filp, F_UNLCK, NULL, (void **)&dp); | |
942 | put_deleg_file(fp); | |
1da177e4 LT |
943 | } |
944 | ||
0af6e690 BF |
945 | static void destroy_unhashed_deleg(struct nfs4_delegation *dp) |
946 | { | |
947 | put_clnt_odstate(dp->dl_clnt_odstate); | |
353601e7 | 948 | nfs4_unlock_deleg_lease(dp); |
0af6e690 BF |
949 | nfs4_put_stid(&dp->dl_stid); |
950 | } | |
951 | ||
cd61c522 | 952 | void nfs4_unhash_stid(struct nfs4_stid *s) |
6136d2b4 | 953 | { |
3abdb607 | 954 | s->sc_type = 0; |
6136d2b4 BF |
955 | } |
956 | ||
34ed9872 | 957 | /** |
68b18f52 | 958 | * nfs4_delegation_exists - Discover if this delegation already exists |
34ed9872 AE |
959 | * @clp: a pointer to the nfs4_client we're granting a delegation to |
960 | * @fp: a pointer to the nfs4_file we're granting a delegation on | |
961 | * | |
962 | * Return: | |
68b18f52 | 963 | * On success: true iff an existing delegation is found |
34ed9872 AE |
964 | */ |
965 | ||
68b18f52 BF |
966 | static bool |
967 | nfs4_delegation_exists(struct nfs4_client *clp, struct nfs4_file *fp) | |
34ed9872 AE |
968 | { |
969 | struct nfs4_delegation *searchdp = NULL; | |
970 | struct nfs4_client *searchclp = NULL; | |
971 | ||
972 | lockdep_assert_held(&state_lock); | |
973 | lockdep_assert_held(&fp->fi_lock); | |
974 | ||
975 | list_for_each_entry(searchdp, &fp->fi_delegations, dl_perfile) { | |
976 | searchclp = searchdp->dl_stid.sc_client; | |
977 | if (clp == searchclp) { | |
51d87bc2 | 978 | return true; |
34ed9872 AE |
979 | } |
980 | } | |
51d87bc2 | 981 | return false; |
34ed9872 AE |
982 | } |
983 | ||
984 | /** | |
985 | * hash_delegation_locked - Add a delegation to the appropriate lists | |
986 | * @dp: a pointer to the nfs4_delegation we are adding. | |
987 | * @fp: a pointer to the nfs4_file we're granting a delegation on | |
988 | * | |
989 | * Return: | |
990 | * On success: NULL if the delegation was successfully hashed. | |
991 | * | |
992 | * On error: -EAGAIN if one was previously granted to this | |
993 | * nfs4_client for this nfs4_file. Delegation is not hashed. | |
994 | * | |
995 | */ | |
996 | ||
997 | static int | |
931ee56c BH |
998 | hash_delegation_locked(struct nfs4_delegation *dp, struct nfs4_file *fp) |
999 | { | |
34ed9872 AE |
1000 | struct nfs4_client *clp = dp->dl_stid.sc_client; |
1001 | ||
cdc97505 | 1002 | lockdep_assert_held(&state_lock); |
417c6629 | 1003 | lockdep_assert_held(&fp->fi_lock); |
931ee56c | 1004 | |
68b18f52 BF |
1005 | if (nfs4_delegation_exists(clp, fp)) |
1006 | return -EAGAIN; | |
a15dfcd5 | 1007 | refcount_inc(&dp->dl_stid.sc_count); |
3fb87d13 | 1008 | dp->dl_stid.sc_type = NFS4_DELEG_STID; |
931ee56c | 1009 | list_add(&dp->dl_perfile, &fp->fi_delegations); |
34ed9872 AE |
1010 | list_add(&dp->dl_perclnt, &clp->cl_delegations); |
1011 | return 0; | |
931ee56c BH |
1012 | } |
1013 | ||
3fcbbd24 | 1014 | static bool |
42690676 | 1015 | unhash_delegation_locked(struct nfs4_delegation *dp) |
1da177e4 | 1016 | { |
11b9164a | 1017 | struct nfs4_file *fp = dp->dl_stid.sc_file; |
02e1215f | 1018 | |
42690676 JL |
1019 | lockdep_assert_held(&state_lock); |
1020 | ||
3fcbbd24 JL |
1021 | if (list_empty(&dp->dl_perfile)) |
1022 | return false; | |
1023 | ||
b0fc29d6 | 1024 | dp->dl_stid.sc_type = NFS4_CLOSED_DELEG_STID; |
d55a166c JL |
1025 | /* Ensure that deleg break won't try to requeue it */ |
1026 | ++dp->dl_time; | |
417c6629 | 1027 | spin_lock(&fp->fi_lock); |
931ee56c | 1028 | list_del_init(&dp->dl_perclnt); |
1da177e4 | 1029 | list_del_init(&dp->dl_recall_lru); |
02e1215f JL |
1030 | list_del_init(&dp->dl_perfile); |
1031 | spin_unlock(&fp->fi_lock); | |
3fcbbd24 | 1032 | return true; |
3bd64a5b BF |
1033 | } |
1034 | ||
3bd64a5b BF |
1035 | static void destroy_delegation(struct nfs4_delegation *dp) |
1036 | { | |
3fcbbd24 JL |
1037 | bool unhashed; |
1038 | ||
42690676 | 1039 | spin_lock(&state_lock); |
3fcbbd24 | 1040 | unhashed = unhash_delegation_locked(dp); |
42690676 | 1041 | spin_unlock(&state_lock); |
0af6e690 BF |
1042 | if (unhashed) |
1043 | destroy_unhashed_deleg(dp); | |
3bd64a5b BF |
1044 | } |
1045 | ||
1046 | static void revoke_delegation(struct nfs4_delegation *dp) | |
1047 | { | |
1048 | struct nfs4_client *clp = dp->dl_stid.sc_client; | |
1049 | ||
2d4a532d JL |
1050 | WARN_ON(!list_empty(&dp->dl_recall_lru)); |
1051 | ||
0af6e690 | 1052 | if (clp->cl_minorversion) { |
3bd64a5b | 1053 | dp->dl_stid.sc_type = NFS4_REVOKED_DELEG_STID; |
0af6e690 | 1054 | refcount_inc(&dp->dl_stid.sc_count); |
2d4a532d JL |
1055 | spin_lock(&clp->cl_lock); |
1056 | list_add(&dp->dl_recall_lru, &clp->cl_revoked); | |
1057 | spin_unlock(&clp->cl_lock); | |
3bd64a5b | 1058 | } |
0af6e690 | 1059 | destroy_unhashed_deleg(dp); |
3bd64a5b BF |
1060 | } |
1061 | ||
1da177e4 LT |
1062 | /* |
1063 | * SETCLIENTID state | |
1064 | */ | |
1065 | ||
ddc04c41 BF |
1066 | static unsigned int clientid_hashval(u32 id) |
1067 | { | |
1068 | return id & CLIENT_HASH_MASK; | |
1069 | } | |
1070 | ||
6b189105 | 1071 | static unsigned int clientstr_hashval(struct xdr_netobj name) |
ddc04c41 | 1072 | { |
6b189105 | 1073 | return opaque_hashval(name.data, 8) & CLIENT_HASH_MASK; |
ddc04c41 BF |
1074 | } |
1075 | ||
f9d7562f BF |
1076 | /* |
1077 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
1078 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
1079 | * only what share bits are currently in force, but also what | |
1080 | * combinations of share bits previous opens have used. This allows us | |
1081 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
1082 | * return an error if the client attempt to downgrade to a combination | |
1083 | * of share bits not explicable by closing some of its previous opens. | |
1084 | * | |
1085 | * XXX: This enforcement is actually incomplete, since we don't keep | |
1086 | * track of access/deny bit combinations; so, e.g., we allow: | |
1087 | * | |
1088 | * OPEN allow read, deny write | |
1089 | * OPEN allow both, deny none | |
1090 | * DOWNGRADE allow read, deny none | |
1091 | * | |
1092 | * which we should reject. | |
1093 | */ | |
5ae037e5 JL |
1094 | static unsigned int |
1095 | bmap_to_share_mode(unsigned long bmap) { | |
f9d7562f | 1096 | int i; |
5ae037e5 | 1097 | unsigned int access = 0; |
f9d7562f | 1098 | |
f9d7562f BF |
1099 | for (i = 1; i < 4; i++) { |
1100 | if (test_bit(i, &bmap)) | |
5ae037e5 | 1101 | access |= i; |
f9d7562f | 1102 | } |
5ae037e5 | 1103 | return access; |
f9d7562f BF |
1104 | } |
1105 | ||
82c5ff1b JL |
1106 | /* set share access for a given stateid */ |
1107 | static inline void | |
1108 | set_access(u32 access, struct nfs4_ol_stateid *stp) | |
1109 | { | |
c11c591f JL |
1110 | unsigned char mask = 1 << access; |
1111 | ||
1112 | WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH); | |
1113 | stp->st_access_bmap |= mask; | |
82c5ff1b JL |
1114 | } |
1115 | ||
1116 | /* clear share access for a given stateid */ | |
1117 | static inline void | |
1118 | clear_access(u32 access, struct nfs4_ol_stateid *stp) | |
1119 | { | |
c11c591f JL |
1120 | unsigned char mask = 1 << access; |
1121 | ||
1122 | WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH); | |
1123 | stp->st_access_bmap &= ~mask; | |
82c5ff1b JL |
1124 | } |
1125 | ||
1126 | /* test whether a given stateid has access */ | |
1127 | static inline bool | |
1128 | test_access(u32 access, struct nfs4_ol_stateid *stp) | |
1129 | { | |
c11c591f JL |
1130 | unsigned char mask = 1 << access; |
1131 | ||
1132 | return (bool)(stp->st_access_bmap & mask); | |
82c5ff1b JL |
1133 | } |
1134 | ||
ce0fc43c JL |
1135 | /* set share deny for a given stateid */ |
1136 | static inline void | |
c11c591f | 1137 | set_deny(u32 deny, struct nfs4_ol_stateid *stp) |
ce0fc43c | 1138 | { |
c11c591f JL |
1139 | unsigned char mask = 1 << deny; |
1140 | ||
1141 | WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH); | |
1142 | stp->st_deny_bmap |= mask; | |
ce0fc43c JL |
1143 | } |
1144 | ||
1145 | /* clear share deny for a given stateid */ | |
1146 | static inline void | |
c11c591f | 1147 | clear_deny(u32 deny, struct nfs4_ol_stateid *stp) |
ce0fc43c | 1148 | { |
c11c591f JL |
1149 | unsigned char mask = 1 << deny; |
1150 | ||
1151 | WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH); | |
1152 | stp->st_deny_bmap &= ~mask; | |
ce0fc43c JL |
1153 | } |
1154 | ||
1155 | /* test whether a given stateid is denying specific access */ | |
1156 | static inline bool | |
c11c591f | 1157 | test_deny(u32 deny, struct nfs4_ol_stateid *stp) |
ce0fc43c | 1158 | { |
c11c591f JL |
1159 | unsigned char mask = 1 << deny; |
1160 | ||
1161 | return (bool)(stp->st_deny_bmap & mask); | |
f9d7562f BF |
1162 | } |
1163 | ||
1164 | static int nfs4_access_to_omode(u32 access) | |
1165 | { | |
8f34a430 | 1166 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
1167 | case NFS4_SHARE_ACCESS_READ: |
1168 | return O_RDONLY; | |
1169 | case NFS4_SHARE_ACCESS_WRITE: | |
1170 | return O_WRONLY; | |
1171 | case NFS4_SHARE_ACCESS_BOTH: | |
1172 | return O_RDWR; | |
1173 | } | |
063b0fb9 BF |
1174 | WARN_ON_ONCE(1); |
1175 | return O_RDONLY; | |
f9d7562f BF |
1176 | } |
1177 | ||
baeb4ff0 JL |
1178 | /* |
1179 | * A stateid that had a deny mode associated with it is being released | |
1180 | * or downgraded. Recalculate the deny mode on the file. | |
1181 | */ | |
1182 | static void | |
1183 | recalculate_deny_mode(struct nfs4_file *fp) | |
1184 | { | |
1185 | struct nfs4_ol_stateid *stp; | |
1186 | ||
1187 | spin_lock(&fp->fi_lock); | |
1188 | fp->fi_share_deny = 0; | |
1189 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) | |
1190 | fp->fi_share_deny |= bmap_to_share_mode(stp->st_deny_bmap); | |
1191 | spin_unlock(&fp->fi_lock); | |
1192 | } | |
1193 | ||
1194 | static void | |
1195 | reset_union_bmap_deny(u32 deny, struct nfs4_ol_stateid *stp) | |
1196 | { | |
1197 | int i; | |
1198 | bool change = false; | |
1199 | ||
1200 | for (i = 1; i < 4; i++) { | |
1201 | if ((i & deny) != i) { | |
1202 | change = true; | |
1203 | clear_deny(i, stp); | |
1204 | } | |
1205 | } | |
1206 | ||
1207 | /* Recalculate per-file deny mode if there was a change */ | |
1208 | if (change) | |
11b9164a | 1209 | recalculate_deny_mode(stp->st_stid.sc_file); |
baeb4ff0 JL |
1210 | } |
1211 | ||
82c5ff1b JL |
1212 | /* release all access and file references for a given stateid */ |
1213 | static void | |
1214 | release_all_access(struct nfs4_ol_stateid *stp) | |
1215 | { | |
1216 | int i; | |
11b9164a | 1217 | struct nfs4_file *fp = stp->st_stid.sc_file; |
baeb4ff0 JL |
1218 | |
1219 | if (fp && stp->st_deny_bmap != 0) | |
1220 | recalculate_deny_mode(fp); | |
82c5ff1b JL |
1221 | |
1222 | for (i = 1; i < 4; i++) { | |
1223 | if (test_access(i, stp)) | |
11b9164a | 1224 | nfs4_file_put_access(stp->st_stid.sc_file, i); |
82c5ff1b JL |
1225 | clear_access(i, stp); |
1226 | } | |
1227 | } | |
1228 | ||
d50ffded KM |
1229 | static inline void nfs4_free_stateowner(struct nfs4_stateowner *sop) |
1230 | { | |
1231 | kfree(sop->so_owner.data); | |
1232 | sop->so_ops->so_free(sop); | |
1233 | } | |
1234 | ||
6b180f0b JL |
1235 | static void nfs4_put_stateowner(struct nfs4_stateowner *sop) |
1236 | { | |
a819ecc1 JL |
1237 | struct nfs4_client *clp = sop->so_client; |
1238 | ||
1239 | might_lock(&clp->cl_lock); | |
1240 | ||
1241 | if (!atomic_dec_and_lock(&sop->so_count, &clp->cl_lock)) | |
6b180f0b | 1242 | return; |
8f4b54c5 | 1243 | sop->so_ops->so_unhash(sop); |
a819ecc1 | 1244 | spin_unlock(&clp->cl_lock); |
d50ffded | 1245 | nfs4_free_stateowner(sop); |
6b180f0b JL |
1246 | } |
1247 | ||
e8568739 | 1248 | static bool unhash_ol_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 1249 | { |
11b9164a | 1250 | struct nfs4_file *fp = stp->st_stid.sc_file; |
1d31a253 | 1251 | |
1c755dc1 JL |
1252 | lockdep_assert_held(&stp->st_stateowner->so_client->cl_lock); |
1253 | ||
e8568739 JL |
1254 | if (list_empty(&stp->st_perfile)) |
1255 | return false; | |
1256 | ||
1d31a253 | 1257 | spin_lock(&fp->fi_lock); |
e8568739 | 1258 | list_del_init(&stp->st_perfile); |
1d31a253 | 1259 | spin_unlock(&fp->fi_lock); |
529d7b2a | 1260 | list_del(&stp->st_perstateowner); |
e8568739 | 1261 | return true; |
529d7b2a BF |
1262 | } |
1263 | ||
6011695d | 1264 | static void nfs4_free_ol_stateid(struct nfs4_stid *stid) |
529d7b2a | 1265 | { |
6011695d | 1266 | struct nfs4_ol_stateid *stp = openlockstateid(stid); |
4665e2ba | 1267 | |
8287f009 | 1268 | put_clnt_odstate(stp->st_clnt_odstate); |
6011695d | 1269 | release_all_access(stp); |
d3134b10 JL |
1270 | if (stp->st_stateowner) |
1271 | nfs4_put_stateowner(stp->st_stateowner); | |
6011695d | 1272 | kmem_cache_free(stateid_slab, stid); |
529d7b2a BF |
1273 | } |
1274 | ||
b49e084d | 1275 | static void nfs4_free_lock_stateid(struct nfs4_stid *stid) |
529d7b2a | 1276 | { |
b49e084d JL |
1277 | struct nfs4_ol_stateid *stp = openlockstateid(stid); |
1278 | struct nfs4_lockowner *lo = lockowner(stp->st_stateowner); | |
529d7b2a BF |
1279 | struct file *file; |
1280 | ||
b49e084d JL |
1281 | file = find_any_file(stp->st_stid.sc_file); |
1282 | if (file) | |
1283 | filp_close(file, (fl_owner_t)lo); | |
1284 | nfs4_free_ol_stateid(stid); | |
1285 | } | |
1286 | ||
2c41beb0 JL |
1287 | /* |
1288 | * Put the persistent reference to an already unhashed generic stateid, while | |
1289 | * holding the cl_lock. If it's the last reference, then put it onto the | |
1290 | * reaplist for later destruction. | |
1291 | */ | |
1292 | static void put_ol_stateid_locked(struct nfs4_ol_stateid *stp, | |
1293 | struct list_head *reaplist) | |
1294 | { | |
1295 | struct nfs4_stid *s = &stp->st_stid; | |
1296 | struct nfs4_client *clp = s->sc_client; | |
1297 | ||
1298 | lockdep_assert_held(&clp->cl_lock); | |
1299 | ||
1300 | WARN_ON_ONCE(!list_empty(&stp->st_locks)); | |
1301 | ||
a15dfcd5 | 1302 | if (!refcount_dec_and_test(&s->sc_count)) { |
2c41beb0 JL |
1303 | wake_up_all(&close_wq); |
1304 | return; | |
1305 | } | |
1306 | ||
1307 | idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id); | |
1308 | list_add(&stp->st_locks, reaplist); | |
1309 | } | |
1310 | ||
e8568739 | 1311 | static bool unhash_lock_stateid(struct nfs4_ol_stateid *stp) |
b49e084d | 1312 | { |
f46c445b | 1313 | lockdep_assert_held(&stp->st_stid.sc_client->cl_lock); |
3c1c995c JL |
1314 | |
1315 | list_del_init(&stp->st_locks); | |
cd61c522 | 1316 | nfs4_unhash_stid(&stp->st_stid); |
e8568739 | 1317 | return unhash_ol_stateid(stp); |
3c1c995c JL |
1318 | } |
1319 | ||
1320 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) | |
1321 | { | |
f46c445b | 1322 | struct nfs4_client *clp = stp->st_stid.sc_client; |
e8568739 | 1323 | bool unhashed; |
3c1c995c | 1324 | |
f46c445b | 1325 | spin_lock(&clp->cl_lock); |
e8568739 | 1326 | unhashed = unhash_lock_stateid(stp); |
f46c445b | 1327 | spin_unlock(&clp->cl_lock); |
e8568739 JL |
1328 | if (unhashed) |
1329 | nfs4_put_stid(&stp->st_stid); | |
529d7b2a BF |
1330 | } |
1331 | ||
c58c6610 | 1332 | static void unhash_lockowner_locked(struct nfs4_lockowner *lo) |
8f4b54c5 | 1333 | { |
d4f0489f | 1334 | struct nfs4_client *clp = lo->lo_owner.so_client; |
c58c6610 | 1335 | |
d4f0489f | 1336 | lockdep_assert_held(&clp->cl_lock); |
c58c6610 | 1337 | |
8f4b54c5 JL |
1338 | list_del_init(&lo->lo_owner.so_strhash); |
1339 | } | |
1340 | ||
2c41beb0 JL |
1341 | /* |
1342 | * Free a list of generic stateids that were collected earlier after being | |
1343 | * fully unhashed. | |
1344 | */ | |
1345 | static void | |
1346 | free_ol_stateid_reaplist(struct list_head *reaplist) | |
1347 | { | |
1348 | struct nfs4_ol_stateid *stp; | |
fb94d766 | 1349 | struct nfs4_file *fp; |
2c41beb0 JL |
1350 | |
1351 | might_sleep(); | |
1352 | ||
1353 | while (!list_empty(reaplist)) { | |
1354 | stp = list_first_entry(reaplist, struct nfs4_ol_stateid, | |
1355 | st_locks); | |
1356 | list_del(&stp->st_locks); | |
fb94d766 | 1357 | fp = stp->st_stid.sc_file; |
2c41beb0 | 1358 | stp->st_stid.sc_free(&stp->st_stid); |
fb94d766 KM |
1359 | if (fp) |
1360 | put_nfs4_file(fp); | |
2c41beb0 JL |
1361 | } |
1362 | } | |
1363 | ||
d83017f9 JL |
1364 | static void release_open_stateid_locks(struct nfs4_ol_stateid *open_stp, |
1365 | struct list_head *reaplist) | |
3c87b9b7 TM |
1366 | { |
1367 | struct nfs4_ol_stateid *stp; | |
1368 | ||
e8568739 JL |
1369 | lockdep_assert_held(&open_stp->st_stid.sc_client->cl_lock); |
1370 | ||
3c87b9b7 TM |
1371 | while (!list_empty(&open_stp->st_locks)) { |
1372 | stp = list_entry(open_stp->st_locks.next, | |
1373 | struct nfs4_ol_stateid, st_locks); | |
e8568739 | 1374 | WARN_ON(!unhash_lock_stateid(stp)); |
d83017f9 | 1375 | put_ol_stateid_locked(stp, reaplist); |
529d7b2a BF |
1376 | } |
1377 | } | |
1378 | ||
e8568739 | 1379 | static bool unhash_open_stateid(struct nfs4_ol_stateid *stp, |
d83017f9 | 1380 | struct list_head *reaplist) |
2283963f | 1381 | { |
e8568739 JL |
1382 | bool unhashed; |
1383 | ||
2c41beb0 JL |
1384 | lockdep_assert_held(&stp->st_stid.sc_client->cl_lock); |
1385 | ||
e8568739 | 1386 | unhashed = unhash_ol_stateid(stp); |
d83017f9 | 1387 | release_open_stateid_locks(stp, reaplist); |
e8568739 | 1388 | return unhashed; |
38c387b5 BF |
1389 | } |
1390 | ||
1391 | static void release_open_stateid(struct nfs4_ol_stateid *stp) | |
1392 | { | |
2c41beb0 JL |
1393 | LIST_HEAD(reaplist); |
1394 | ||
1395 | spin_lock(&stp->st_stid.sc_client->cl_lock); | |
e8568739 JL |
1396 | if (unhash_open_stateid(stp, &reaplist)) |
1397 | put_ol_stateid_locked(stp, &reaplist); | |
2c41beb0 JL |
1398 | spin_unlock(&stp->st_stid.sc_client->cl_lock); |
1399 | free_ol_stateid_reaplist(&reaplist); | |
2283963f BF |
1400 | } |
1401 | ||
7ffb5880 | 1402 | static void unhash_openowner_locked(struct nfs4_openowner *oo) |
f1d110ca | 1403 | { |
d4f0489f | 1404 | struct nfs4_client *clp = oo->oo_owner.so_client; |
7ffb5880 | 1405 | |
d4f0489f | 1406 | lockdep_assert_held(&clp->cl_lock); |
7ffb5880 | 1407 | |
8f4b54c5 JL |
1408 | list_del_init(&oo->oo_owner.so_strhash); |
1409 | list_del_init(&oo->oo_perclient); | |
f1d110ca BF |
1410 | } |
1411 | ||
f7a4d872 BF |
1412 | static void release_last_closed_stateid(struct nfs4_openowner *oo) |
1413 | { | |
217526e7 JL |
1414 | struct nfsd_net *nn = net_generic(oo->oo_owner.so_client->net, |
1415 | nfsd_net_id); | |
1416 | struct nfs4_ol_stateid *s; | |
f7a4d872 | 1417 | |
217526e7 JL |
1418 | spin_lock(&nn->client_lock); |
1419 | s = oo->oo_last_closed_stid; | |
f7a4d872 | 1420 | if (s) { |
d3134b10 | 1421 | list_del_init(&oo->oo_close_lru); |
f7a4d872 BF |
1422 | oo->oo_last_closed_stid = NULL; |
1423 | } | |
217526e7 JL |
1424 | spin_unlock(&nn->client_lock); |
1425 | if (s) | |
1426 | nfs4_put_stid(&s->st_stid); | |
f7a4d872 BF |
1427 | } |
1428 | ||
2c41beb0 | 1429 | static void release_openowner(struct nfs4_openowner *oo) |
8f4b54c5 JL |
1430 | { |
1431 | struct nfs4_ol_stateid *stp; | |
d4f0489f | 1432 | struct nfs4_client *clp = oo->oo_owner.so_client; |
2c41beb0 | 1433 | struct list_head reaplist; |
7ffb5880 | 1434 | |
2c41beb0 | 1435 | INIT_LIST_HEAD(&reaplist); |
8f4b54c5 | 1436 | |
2c41beb0 JL |
1437 | spin_lock(&clp->cl_lock); |
1438 | unhash_openowner_locked(oo); | |
8f4b54c5 JL |
1439 | while (!list_empty(&oo->oo_owner.so_stateids)) { |
1440 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
1441 | struct nfs4_ol_stateid, st_perstateowner); | |
e8568739 JL |
1442 | if (unhash_open_stateid(stp, &reaplist)) |
1443 | put_ol_stateid_locked(stp, &reaplist); | |
8f4b54c5 | 1444 | } |
d4f0489f | 1445 | spin_unlock(&clp->cl_lock); |
2c41beb0 | 1446 | free_ol_stateid_reaplist(&reaplist); |
f7a4d872 | 1447 | release_last_closed_stateid(oo); |
6b180f0b | 1448 | nfs4_put_stateowner(&oo->oo_owner); |
f1d110ca BF |
1449 | } |
1450 | ||
5282fd72 ME |
1451 | static inline int |
1452 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
1453 | { | |
1454 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
1455 | ||
1456 | return sid->sequence % SESSION_HASH_SIZE; | |
1457 | } | |
1458 | ||
135dd002 | 1459 | #ifdef CONFIG_SUNRPC_DEBUG |
5282fd72 ME |
1460 | static inline void |
1461 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
1462 | { | |
1463 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
1464 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
1465 | } | |
8f199b82 TM |
1466 | #else |
1467 | static inline void | |
1468 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
1469 | { | |
1470 | } | |
1471 | #endif | |
1472 | ||
9411b1d4 BF |
1473 | /* |
1474 | * Bump the seqid on cstate->replay_owner, and clear replay_owner if it | |
1475 | * won't be used for replay. | |
1476 | */ | |
1477 | void nfsd4_bump_seqid(struct nfsd4_compound_state *cstate, __be32 nfserr) | |
1478 | { | |
1479 | struct nfs4_stateowner *so = cstate->replay_owner; | |
1480 | ||
1481 | if (nfserr == nfserr_replay_me) | |
1482 | return; | |
1483 | ||
1484 | if (!seqid_mutating_err(ntohl(nfserr))) { | |
58fb12e6 | 1485 | nfsd4_cstate_clear_replay(cstate); |
9411b1d4 BF |
1486 | return; |
1487 | } | |
1488 | if (!so) | |
1489 | return; | |
1490 | if (so->so_is_open_owner) | |
1491 | release_last_closed_stateid(openowner(so)); | |
1492 | so->so_seqid++; | |
1493 | return; | |
1494 | } | |
5282fd72 | 1495 | |
ec6b5d7b AA |
1496 | static void |
1497 | gen_sessionid(struct nfsd4_session *ses) | |
1498 | { | |
1499 | struct nfs4_client *clp = ses->se_client; | |
1500 | struct nfsd4_sessionid *sid; | |
1501 | ||
1502 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
1503 | sid->clientid = clp->cl_clientid; | |
1504 | sid->sequence = current_sessionid++; | |
1505 | sid->reserved = 0; | |
1506 | } | |
1507 | ||
1508 | /* | |
a649637c AA |
1509 | * The protocol defines ca_maxresponssize_cached to include the size of |
1510 | * the rpc header, but all we need to cache is the data starting after | |
1511 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
1512 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
1513 | * value that is the number of bytes in our cache plus a few additional | |
1514 | * bytes. In order to stay on the safe side, and not promise more than | |
1515 | * we can cache, those additional bytes must be the minimum possible: 24 | |
1516 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
1517 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
1518 | * for the SEQUENCE op response: | |
1519 | */ | |
1520 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
1521 | ||
557ce264 AA |
1522 | static void |
1523 | free_session_slots(struct nfsd4_session *ses) | |
1524 | { | |
1525 | int i; | |
1526 | ||
53da6a53 BF |
1527 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) { |
1528 | free_svc_cred(&ses->se_slots[i]->sl_cred); | |
557ce264 | 1529 | kfree(ses->se_slots[i]); |
53da6a53 | 1530 | } |
557ce264 AA |
1531 | } |
1532 | ||
a649637c | 1533 | /* |
efe0cb6d BF |
1534 | * We don't actually need to cache the rpc and session headers, so we |
1535 | * can allocate a little less for each slot: | |
1536 | */ | |
55c760cf | 1537 | static inline u32 slot_bytes(struct nfsd4_channel_attrs *ca) |
efe0cb6d | 1538 | { |
55c760cf | 1539 | u32 size; |
efe0cb6d | 1540 | |
55c760cf BF |
1541 | if (ca->maxresp_cached < NFSD_MIN_HDR_SEQ_SZ) |
1542 | size = 0; | |
1543 | else | |
1544 | size = ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
1545 | return size + sizeof(struct nfsd4_slot); | |
5b6feee9 | 1546 | } |
ec6b5d7b | 1547 | |
5b6feee9 BF |
1548 | /* |
1549 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c | 1550 | * re-negotiate active sessions and reduce their slot usage to make |
42b2aa86 | 1551 | * room for new connections. For now we just fail the create session. |
ec6b5d7b | 1552 | */ |
55c760cf | 1553 | static u32 nfsd4_get_drc_mem(struct nfsd4_channel_attrs *ca) |
ec6b5d7b | 1554 | { |
55c760cf BF |
1555 | u32 slotsize = slot_bytes(ca); |
1556 | u32 num = ca->maxreqs; | |
c54f24e3 | 1557 | unsigned long avail, total_avail; |
ec6b5d7b | 1558 | |
5b6feee9 | 1559 | spin_lock(&nfsd_drc_lock); |
c54f24e3 BF |
1560 | total_avail = nfsd_drc_max_mem - nfsd_drc_mem_used; |
1561 | avail = min((unsigned long)NFSD_MAX_MEM_PER_SESSION, total_avail); | |
de766e57 BF |
1562 | /* |
1563 | * Never use more than a third of the remaining memory, | |
1564 | * unless it's the only way to give this client a slot: | |
1565 | */ | |
c54f24e3 | 1566 | avail = clamp_t(int, avail, slotsize, total_avail/3); |
5b6feee9 BF |
1567 | num = min_t(int, num, avail / slotsize); |
1568 | nfsd_drc_mem_used += num * slotsize; | |
1569 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 1570 | |
5b6feee9 BF |
1571 | return num; |
1572 | } | |
ec6b5d7b | 1573 | |
55c760cf | 1574 | static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs *ca) |
5b6feee9 | 1575 | { |
55c760cf BF |
1576 | int slotsize = slot_bytes(ca); |
1577 | ||
4bd9b0f4 | 1578 | spin_lock(&nfsd_drc_lock); |
55c760cf | 1579 | nfsd_drc_mem_used -= slotsize * ca->maxreqs; |
4bd9b0f4 | 1580 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 1581 | } |
ec6b5d7b | 1582 | |
60810e54 KM |
1583 | static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fattrs, |
1584 | struct nfsd4_channel_attrs *battrs) | |
5b6feee9 | 1585 | { |
60810e54 KM |
1586 | int numslots = fattrs->maxreqs; |
1587 | int slotsize = slot_bytes(fattrs); | |
5b6feee9 BF |
1588 | struct nfsd4_session *new; |
1589 | int mem, i; | |
a649637c | 1590 | |
5b6feee9 BF |
1591 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
1592 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
1593 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 1594 | |
5b6feee9 BF |
1595 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
1596 | if (!new) | |
1597 | return NULL; | |
557ce264 | 1598 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 | 1599 | for (i = 0; i < numslots; i++) { |
55c760cf | 1600 | new->se_slots[i] = kzalloc(slotsize, GFP_KERNEL); |
5b6feee9 | 1601 | if (!new->se_slots[i]) |
557ce264 | 1602 | goto out_free; |
557ce264 | 1603 | } |
60810e54 KM |
1604 | |
1605 | memcpy(&new->se_fchannel, fattrs, sizeof(struct nfsd4_channel_attrs)); | |
1606 | memcpy(&new->se_bchannel, battrs, sizeof(struct nfsd4_channel_attrs)); | |
1607 | ||
5b6feee9 BF |
1608 | return new; |
1609 | out_free: | |
1610 | while (i--) | |
1611 | kfree(new->se_slots[i]); | |
1612 | kfree(new); | |
1613 | return NULL; | |
ec6b5d7b AA |
1614 | } |
1615 | ||
19cf5c02 BF |
1616 | static void free_conn(struct nfsd4_conn *c) |
1617 | { | |
1618 | svc_xprt_put(c->cn_xprt); | |
1619 | kfree(c); | |
1620 | } | |
ec6b5d7b | 1621 | |
19cf5c02 BF |
1622 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
1623 | { | |
1624 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
1625 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 1626 | |
19cf5c02 BF |
1627 | spin_lock(&clp->cl_lock); |
1628 | if (!list_empty(&c->cn_persession)) { | |
1629 | list_del(&c->cn_persession); | |
1630 | free_conn(c); | |
1631 | } | |
eea49806 | 1632 | nfsd4_probe_callback(clp); |
2e4b7239 | 1633 | spin_unlock(&clp->cl_lock); |
19cf5c02 | 1634 | } |
ec6b5d7b | 1635 | |
d29c374c | 1636 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 1637 | { |
c7662518 | 1638 | struct nfsd4_conn *conn; |
ec6b5d7b | 1639 | |
c7662518 BF |
1640 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
1641 | if (!conn) | |
db90681d | 1642 | return NULL; |
c7662518 BF |
1643 | svc_xprt_get(rqstp->rq_xprt); |
1644 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 1645 | conn->cn_flags = flags; |
db90681d BF |
1646 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
1647 | return conn; | |
1648 | } | |
a649637c | 1649 | |
328ead28 BF |
1650 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
1651 | { | |
1652 | conn->cn_session = ses; | |
1653 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
1654 | } |
1655 | ||
db90681d | 1656 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 1657 | { |
db90681d | 1658 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 1659 | |
c7662518 | 1660 | spin_lock(&clp->cl_lock); |
328ead28 | 1661 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 1662 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
1663 | } |
1664 | ||
21b75b01 | 1665 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 1666 | { |
19cf5c02 | 1667 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 1668 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
1669 | } |
1670 | ||
e1ff371f | 1671 | static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses) |
ec6b5d7b | 1672 | { |
21b75b01 | 1673 | int ret; |
ec6b5d7b | 1674 | |
db90681d | 1675 | nfsd4_hash_conn(conn, ses); |
21b75b01 BF |
1676 | ret = nfsd4_register_conn(conn); |
1677 | if (ret) | |
1678 | /* oops; xprt is already down: */ | |
1679 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
57a37144 BF |
1680 | /* We may have gained or lost a callback channel: */ |
1681 | nfsd4_probe_callback_sync(ses->se_client); | |
c7662518 | 1682 | } |
ec6b5d7b | 1683 | |
e1ff371f | 1684 | static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses) |
1d1bc8f2 BF |
1685 | { |
1686 | u32 dir = NFS4_CDFC4_FORE; | |
1687 | ||
e1ff371f | 1688 | if (cses->flags & SESSION4_BACK_CHAN) |
1d1bc8f2 | 1689 | dir |= NFS4_CDFC4_BACK; |
e1ff371f | 1690 | return alloc_conn(rqstp, dir); |
1d1bc8f2 BF |
1691 | } |
1692 | ||
1693 | /* must be called under client_lock */ | |
19cf5c02 | 1694 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 1695 | { |
19cf5c02 BF |
1696 | struct nfs4_client *clp = s->se_client; |
1697 | struct nfsd4_conn *c; | |
ec6b5d7b | 1698 | |
19cf5c02 BF |
1699 | spin_lock(&clp->cl_lock); |
1700 | while (!list_empty(&s->se_conns)) { | |
1701 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
1702 | list_del_init(&c->cn_persession); | |
1703 | spin_unlock(&clp->cl_lock); | |
557ce264 | 1704 | |
19cf5c02 BF |
1705 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
1706 | free_conn(c); | |
ec6b5d7b | 1707 | |
19cf5c02 BF |
1708 | spin_lock(&clp->cl_lock); |
1709 | } | |
1710 | spin_unlock(&clp->cl_lock); | |
c7662518 | 1711 | } |
ec6b5d7b | 1712 | |
1377b69e BF |
1713 | static void __free_session(struct nfsd4_session *ses) |
1714 | { | |
1377b69e BF |
1715 | free_session_slots(ses); |
1716 | kfree(ses); | |
1717 | } | |
1718 | ||
66b2b9b2 | 1719 | static void free_session(struct nfsd4_session *ses) |
c7662518 | 1720 | { |
19cf5c02 | 1721 | nfsd4_del_conns(ses); |
55c760cf | 1722 | nfsd4_put_drc_mem(&ses->se_fchannel); |
1377b69e | 1723 | __free_session(ses); |
c7662518 BF |
1724 | } |
1725 | ||
135ae827 | 1726 | static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
a827bcb2 | 1727 | { |
a827bcb2 | 1728 | int idx; |
1872de0e | 1729 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
a827bcb2 | 1730 | |
ec6b5d7b AA |
1731 | new->se_client = clp; |
1732 | gen_sessionid(new); | |
ec6b5d7b | 1733 | |
c7662518 BF |
1734 | INIT_LIST_HEAD(&new->se_conns); |
1735 | ||
ac7c46f2 | 1736 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 1737 | new->se_flags = cses->flags; |
8b5ce5cd | 1738 | new->se_cb_prog = cses->callback_prog; |
c6bb3ca2 | 1739 | new->se_cb_sec = cses->cb_sec; |
66b2b9b2 | 1740 | atomic_set(&new->se_ref, 0); |
5b6feee9 | 1741 | idx = hash_sessionid(&new->se_sessionid); |
1872de0e | 1742 | list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]); |
4c649378 | 1743 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 1744 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 1745 | spin_unlock(&clp->cl_lock); |
60810e54 | 1746 | |
b0d2e42c | 1747 | { |
edd76786 | 1748 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
1749 | /* |
1750 | * This is a little silly; with sessions there's no real | |
1751 | * use for the callback address. Use the peer address | |
1752 | * as a reasonable default for now, but consider fixing | |
1753 | * the rpc client not to require an address in the | |
1754 | * future: | |
1755 | */ | |
edd76786 BF |
1756 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
1757 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 1758 | } |
ec6b5d7b AA |
1759 | } |
1760 | ||
9089f1b4 | 1761 | /* caller must hold client_lock */ |
5282fd72 | 1762 | static struct nfsd4_session * |
d4e19e70 | 1763 | __find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net) |
5282fd72 ME |
1764 | { |
1765 | struct nfsd4_session *elem; | |
1766 | int idx; | |
1872de0e | 1767 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
5282fd72 | 1768 | |
0a880a28 TM |
1769 | lockdep_assert_held(&nn->client_lock); |
1770 | ||
5282fd72 ME |
1771 | dump_sessionid(__func__, sessionid); |
1772 | idx = hash_sessionid(sessionid); | |
5282fd72 | 1773 | /* Search in the appropriate list */ |
1872de0e | 1774 | list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) { |
5282fd72 ME |
1775 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
1776 | NFS4_MAX_SESSIONID_LEN)) { | |
1777 | return elem; | |
1778 | } | |
1779 | } | |
1780 | ||
1781 | dprintk("%s: session not found\n", __func__); | |
1782 | return NULL; | |
1783 | } | |
1784 | ||
d4e19e70 TM |
1785 | static struct nfsd4_session * |
1786 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net, | |
1787 | __be32 *ret) | |
1788 | { | |
1789 | struct nfsd4_session *session; | |
1790 | __be32 status = nfserr_badsession; | |
1791 | ||
1792 | session = __find_in_sessionid_hashtbl(sessionid, net); | |
1793 | if (!session) | |
1794 | goto out; | |
1795 | status = nfsd4_get_session_locked(session); | |
1796 | if (status) | |
1797 | session = NULL; | |
1798 | out: | |
1799 | *ret = status; | |
1800 | return session; | |
1801 | } | |
1802 | ||
9089f1b4 | 1803 | /* caller must hold client_lock */ |
7116ed6b | 1804 | static void |
5282fd72 | 1805 | unhash_session(struct nfsd4_session *ses) |
7116ed6b | 1806 | { |
0a880a28 TM |
1807 | struct nfs4_client *clp = ses->se_client; |
1808 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
1809 | ||
1810 | lockdep_assert_held(&nn->client_lock); | |
1811 | ||
7116ed6b | 1812 | list_del(&ses->se_hash); |
4c649378 | 1813 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 1814 | list_del(&ses->se_perclnt); |
4c649378 | 1815 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
1816 | } |
1817 | ||
1da177e4 LT |
1818 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
1819 | static int | |
2c142baa | 1820 | STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn) |
1da177e4 | 1821 | { |
bbc7f33a BF |
1822 | /* |
1823 | * We're assuming the clid was not given out from a boot | |
1824 | * precisely 2^32 (about 136 years) before this one. That seems | |
1825 | * a safe assumption: | |
1826 | */ | |
1827 | if (clid->cl_boot == (u32)nn->boot_time) | |
1da177e4 | 1828 | return 0; |
60adfc50 | 1829 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
2c142baa | 1830 | clid->cl_boot, clid->cl_id, nn->boot_time); |
1da177e4 LT |
1831 | return 1; |
1832 | } | |
1833 | ||
1834 | /* | |
1835 | * XXX Should we use a slab cache ? | |
1836 | * This type of memory management is somewhat inefficient, but we use it | |
1837 | * anyway since SETCLIENTID is not a common operation. | |
1838 | */ | |
35bba9a3 | 1839 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
1840 | { |
1841 | struct nfs4_client *clp; | |
d4f0489f | 1842 | int i; |
1da177e4 | 1843 | |
9258a2d5 | 1844 | clp = kmem_cache_zalloc(client_slab, GFP_KERNEL); |
35bba9a3 BF |
1845 | if (clp == NULL) |
1846 | return NULL; | |
67114fe6 | 1847 | clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); |
d4f0489f TM |
1848 | if (clp->cl_name.data == NULL) |
1849 | goto err_no_name; | |
6da2ec56 KC |
1850 | clp->cl_ownerstr_hashtbl = kmalloc_array(OWNER_HASH_SIZE, |
1851 | sizeof(struct list_head), | |
1852 | GFP_KERNEL); | |
d4f0489f TM |
1853 | if (!clp->cl_ownerstr_hashtbl) |
1854 | goto err_no_hashtbl; | |
1855 | for (i = 0; i < OWNER_HASH_SIZE; i++) | |
1856 | INIT_LIST_HEAD(&clp->cl_ownerstr_hashtbl[i]); | |
35bba9a3 | 1857 | clp->cl_name.len = name.len; |
5694c93e TM |
1858 | INIT_LIST_HEAD(&clp->cl_sessions); |
1859 | idr_init(&clp->cl_stateids); | |
1860 | atomic_set(&clp->cl_refcount, 0); | |
1861 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; | |
1862 | INIT_LIST_HEAD(&clp->cl_idhash); | |
1863 | INIT_LIST_HEAD(&clp->cl_openowners); | |
1864 | INIT_LIST_HEAD(&clp->cl_delegations); | |
1865 | INIT_LIST_HEAD(&clp->cl_lru); | |
5694c93e | 1866 | INIT_LIST_HEAD(&clp->cl_revoked); |
9cf514cc CH |
1867 | #ifdef CONFIG_NFSD_PNFS |
1868 | INIT_LIST_HEAD(&clp->cl_lo_states); | |
1869 | #endif | |
e0639dc5 OK |
1870 | INIT_LIST_HEAD(&clp->async_copies); |
1871 | spin_lock_init(&clp->async_lock); | |
5694c93e TM |
1872 | spin_lock_init(&clp->cl_lock); |
1873 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1da177e4 | 1874 | return clp; |
d4f0489f TM |
1875 | err_no_hashtbl: |
1876 | kfree(clp->cl_name.data); | |
1877 | err_no_name: | |
9258a2d5 | 1878 | kmem_cache_free(client_slab, clp); |
d4f0489f | 1879 | return NULL; |
1da177e4 LT |
1880 | } |
1881 | ||
4dd86e15 | 1882 | static void |
1da177e4 LT |
1883 | free_client(struct nfs4_client *clp) |
1884 | { | |
792c95dd BF |
1885 | while (!list_empty(&clp->cl_sessions)) { |
1886 | struct nfsd4_session *ses; | |
1887 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
1888 | se_perclnt); | |
1889 | list_del(&ses->se_perclnt); | |
66b2b9b2 BF |
1890 | WARN_ON_ONCE(atomic_read(&ses->se_ref)); |
1891 | free_session(ses); | |
792c95dd | 1892 | } |
4cb57e30 | 1893 | rpc_destroy_wait_queue(&clp->cl_cb_waitq); |
03a4e1f6 | 1894 | free_svc_cred(&clp->cl_cred); |
d4f0489f | 1895 | kfree(clp->cl_ownerstr_hashtbl); |
1da177e4 | 1896 | kfree(clp->cl_name.data); |
2d32b29a | 1897 | idr_destroy(&clp->cl_stateids); |
9258a2d5 | 1898 | kmem_cache_free(client_slab, clp); |
1da177e4 LT |
1899 | } |
1900 | ||
84d38ac9 | 1901 | /* must be called under the client_lock */ |
4beb345b | 1902 | static void |
84d38ac9 BH |
1903 | unhash_client_locked(struct nfs4_client *clp) |
1904 | { | |
4beb345b | 1905 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
792c95dd BF |
1906 | struct nfsd4_session *ses; |
1907 | ||
0a880a28 TM |
1908 | lockdep_assert_held(&nn->client_lock); |
1909 | ||
4beb345b TM |
1910 | /* Mark the client as expired! */ |
1911 | clp->cl_time = 0; | |
1912 | /* Make it invisible */ | |
1913 | if (!list_empty(&clp->cl_idhash)) { | |
1914 | list_del_init(&clp->cl_idhash); | |
1915 | if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) | |
1916 | rb_erase(&clp->cl_namenode, &nn->conf_name_tree); | |
1917 | else | |
1918 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); | |
1919 | } | |
1920 | list_del_init(&clp->cl_lru); | |
4c649378 | 1921 | spin_lock(&clp->cl_lock); |
792c95dd BF |
1922 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
1923 | list_del_init(&ses->se_hash); | |
4c649378 | 1924 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
1925 | } |
1926 | ||
1da177e4 | 1927 | static void |
4beb345b TM |
1928 | unhash_client(struct nfs4_client *clp) |
1929 | { | |
1930 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
1931 | ||
1932 | spin_lock(&nn->client_lock); | |
1933 | unhash_client_locked(clp); | |
1934 | spin_unlock(&nn->client_lock); | |
1935 | } | |
1936 | ||
97403d95 JL |
1937 | static __be32 mark_client_expired_locked(struct nfs4_client *clp) |
1938 | { | |
1939 | if (atomic_read(&clp->cl_refcount)) | |
1940 | return nfserr_jukebox; | |
1941 | unhash_client_locked(clp); | |
1942 | return nfs_ok; | |
1943 | } | |
1944 | ||
4beb345b TM |
1945 | static void |
1946 | __destroy_client(struct nfs4_client *clp) | |
1da177e4 | 1947 | { |
68ef3bc3 | 1948 | int i; |
fe0750e5 | 1949 | struct nfs4_openowner *oo; |
1da177e4 | 1950 | struct nfs4_delegation *dp; |
1da177e4 LT |
1951 | struct list_head reaplist; |
1952 | ||
1da177e4 | 1953 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 1954 | spin_lock(&state_lock); |
ea1da636 N |
1955 | while (!list_empty(&clp->cl_delegations)) { |
1956 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
3fcbbd24 | 1957 | WARN_ON(!unhash_delegation_locked(dp)); |
42690676 | 1958 | list_add(&dp->dl_recall_lru, &reaplist); |
1da177e4 | 1959 | } |
cdc97505 | 1960 | spin_unlock(&state_lock); |
1da177e4 LT |
1961 | while (!list_empty(&reaplist)) { |
1962 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
42690676 | 1963 | list_del_init(&dp->dl_recall_lru); |
0af6e690 | 1964 | destroy_unhashed_deleg(dp); |
1da177e4 | 1965 | } |
2d4a532d | 1966 | while (!list_empty(&clp->cl_revoked)) { |
c876486b | 1967 | dp = list_entry(clp->cl_revoked.next, struct nfs4_delegation, dl_recall_lru); |
2d4a532d | 1968 | list_del_init(&dp->dl_recall_lru); |
6011695d | 1969 | nfs4_put_stid(&dp->dl_stid); |
956c4fee | 1970 | } |
ea1da636 | 1971 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 | 1972 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
b5971afa | 1973 | nfs4_get_stateowner(&oo->oo_owner); |
fe0750e5 | 1974 | release_openowner(oo); |
1da177e4 | 1975 | } |
68ef3bc3 JL |
1976 | for (i = 0; i < OWNER_HASH_SIZE; i++) { |
1977 | struct nfs4_stateowner *so, *tmp; | |
1978 | ||
1979 | list_for_each_entry_safe(so, tmp, &clp->cl_ownerstr_hashtbl[i], | |
1980 | so_strhash) { | |
1981 | /* Should be no openowners at this point */ | |
1982 | WARN_ON_ONCE(so->so_is_open_owner); | |
1983 | remove_blocked_locks(lockowner(so)); | |
1984 | } | |
1985 | } | |
9cf514cc | 1986 | nfsd4_return_all_client_layouts(clp); |
e0639dc5 | 1987 | nfsd4_shutdown_copy(clp); |
6ff8da08 | 1988 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
1989 | if (clp->cl_cb_conn.cb_xprt) |
1990 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
221a6876 | 1991 | free_client(clp); |
1da177e4 LT |
1992 | } |
1993 | ||
4beb345b TM |
1994 | static void |
1995 | destroy_client(struct nfs4_client *clp) | |
1996 | { | |
1997 | unhash_client(clp); | |
1998 | __destroy_client(clp); | |
1999 | } | |
2000 | ||
362063a5 SM |
2001 | static void inc_reclaim_complete(struct nfs4_client *clp) |
2002 | { | |
2003 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
2004 | ||
2005 | if (!nn->track_reclaim_completes) | |
2006 | return; | |
2007 | if (!nfsd4_find_reclaim_client(clp->cl_name, nn)) | |
2008 | return; | |
2009 | if (atomic_inc_return(&nn->nr_reclaim_complete) == | |
2010 | nn->reclaim_str_hashtbl_size) { | |
2011 | printk(KERN_INFO "NFSD: all clients done reclaiming, ending NFSv4 grace period (net %x)\n", | |
2012 | clp->net->ns.inum); | |
2013 | nfsd4_end_grace(nn); | |
2014 | } | |
2015 | } | |
2016 | ||
0d22f68f BF |
2017 | static void expire_client(struct nfs4_client *clp) |
2018 | { | |
4beb345b | 2019 | unhash_client(clp); |
0d22f68f | 2020 | nfsd4_client_record_remove(clp); |
4beb345b | 2021 | __destroy_client(clp); |
0d22f68f BF |
2022 | } |
2023 | ||
35bba9a3 BF |
2024 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
2025 | { | |
2026 | memcpy(target->cl_verifier.data, source->data, | |
2027 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
2028 | } |
2029 | ||
35bba9a3 BF |
2030 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
2031 | { | |
1da177e4 LT |
2032 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
2033 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
2034 | } | |
2035 | ||
50043859 BF |
2036 | static int copy_cred(struct svc_cred *target, struct svc_cred *source) |
2037 | { | |
2f10fdcb N |
2038 | target->cr_principal = kstrdup(source->cr_principal, GFP_KERNEL); |
2039 | target->cr_raw_principal = kstrdup(source->cr_raw_principal, | |
2040 | GFP_KERNEL); | |
9abdda5d CL |
2041 | target->cr_targ_princ = kstrdup(source->cr_targ_princ, GFP_KERNEL); |
2042 | if ((source->cr_principal && !target->cr_principal) || | |
2043 | (source->cr_raw_principal && !target->cr_raw_principal) || | |
2044 | (source->cr_targ_princ && !target->cr_targ_princ)) | |
2f10fdcb | 2045 | return -ENOMEM; |
50043859 | 2046 | |
d5497fc6 | 2047 | target->cr_flavor = source->cr_flavor; |
1da177e4 LT |
2048 | target->cr_uid = source->cr_uid; |
2049 | target->cr_gid = source->cr_gid; | |
2050 | target->cr_group_info = source->cr_group_info; | |
2051 | get_group_info(target->cr_group_info); | |
0dc1531a BF |
2052 | target->cr_gss_mech = source->cr_gss_mech; |
2053 | if (source->cr_gss_mech) | |
2054 | gss_mech_get(source->cr_gss_mech); | |
03a4e1f6 | 2055 | return 0; |
1da177e4 LT |
2056 | } |
2057 | ||
ef17af2a | 2058 | static int |
ac55fdc4 JL |
2059 | compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2) |
2060 | { | |
ef17af2a RV |
2061 | if (o1->len < o2->len) |
2062 | return -1; | |
2063 | if (o1->len > o2->len) | |
2064 | return 1; | |
2065 | return memcmp(o1->data, o2->data, o1->len); | |
ac55fdc4 JL |
2066 | } |
2067 | ||
1da177e4 | 2068 | static int |
599e0a22 BF |
2069 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
2070 | { | |
2071 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
2072 | } |
2073 | ||
2074 | static int | |
599e0a22 BF |
2075 | same_clid(clientid_t *cl1, clientid_t *cl2) |
2076 | { | |
2077 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
2078 | } |
2079 | ||
8fbba96e BF |
2080 | static bool groups_equal(struct group_info *g1, struct group_info *g2) |
2081 | { | |
2082 | int i; | |
2083 | ||
2084 | if (g1->ngroups != g2->ngroups) | |
2085 | return false; | |
2086 | for (i=0; i<g1->ngroups; i++) | |
81243eac | 2087 | if (!gid_eq(g1->gid[i], g2->gid[i])) |
8fbba96e BF |
2088 | return false; |
2089 | return true; | |
2090 | } | |
2091 | ||
68eb3508 BF |
2092 | /* |
2093 | * RFC 3530 language requires clid_inuse be returned when the | |
2094 | * "principal" associated with a requests differs from that previously | |
2095 | * used. We use uid, gid's, and gss principal string as our best | |
2096 | * approximation. We also don't want to allow non-gss use of a client | |
2097 | * established using gss: in theory cr_principal should catch that | |
2098 | * change, but in practice cr_principal can be null even in the gss case | |
2099 | * since gssd doesn't always pass down a principal string. | |
2100 | */ | |
2101 | static bool is_gss_cred(struct svc_cred *cr) | |
2102 | { | |
2103 | /* Is cr_flavor one of the gss "pseudoflavors"?: */ | |
2104 | return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR); | |
2105 | } | |
2106 | ||
2107 | ||
5559b50a | 2108 | static bool |
599e0a22 BF |
2109 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
2110 | { | |
68eb3508 | 2111 | if ((is_gss_cred(cr1) != is_gss_cred(cr2)) |
6fab8779 EB |
2112 | || (!uid_eq(cr1->cr_uid, cr2->cr_uid)) |
2113 | || (!gid_eq(cr1->cr_gid, cr2->cr_gid)) | |
8fbba96e BF |
2114 | || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) |
2115 | return false; | |
9abdda5d | 2116 | /* XXX: check that cr_targ_princ fields match ? */ |
8fbba96e BF |
2117 | if (cr1->cr_principal == cr2->cr_principal) |
2118 | return true; | |
2119 | if (!cr1->cr_principal || !cr2->cr_principal) | |
2120 | return false; | |
5559b50a | 2121 | return 0 == strcmp(cr1->cr_principal, cr2->cr_principal); |
1da177e4 LT |
2122 | } |
2123 | ||
57266a6e BF |
2124 | static bool svc_rqst_integrity_protected(struct svc_rqst *rqstp) |
2125 | { | |
2126 | struct svc_cred *cr = &rqstp->rq_cred; | |
2127 | u32 service; | |
2128 | ||
c4720591 BF |
2129 | if (!cr->cr_gss_mech) |
2130 | return false; | |
57266a6e BF |
2131 | service = gss_pseudoflavor_to_service(cr->cr_gss_mech, cr->cr_flavor); |
2132 | return service == RPC_GSS_SVC_INTEGRITY || | |
2133 | service == RPC_GSS_SVC_PRIVACY; | |
2134 | } | |
2135 | ||
dedeb13f | 2136 | bool nfsd4_mach_creds_match(struct nfs4_client *cl, struct svc_rqst *rqstp) |
57266a6e BF |
2137 | { |
2138 | struct svc_cred *cr = &rqstp->rq_cred; | |
2139 | ||
2140 | if (!cl->cl_mach_cred) | |
2141 | return true; | |
2142 | if (cl->cl_cred.cr_gss_mech != cr->cr_gss_mech) | |
2143 | return false; | |
2144 | if (!svc_rqst_integrity_protected(rqstp)) | |
2145 | return false; | |
414ca017 BF |
2146 | if (cl->cl_cred.cr_raw_principal) |
2147 | return 0 == strcmp(cl->cl_cred.cr_raw_principal, | |
2148 | cr->cr_raw_principal); | |
57266a6e BF |
2149 | if (!cr->cr_principal) |
2150 | return false; | |
2151 | return 0 == strcmp(cl->cl_cred.cr_principal, cr->cr_principal); | |
2152 | } | |
2153 | ||
294ac32e | 2154 | static void gen_confirm(struct nfs4_client *clp, struct nfsd_net *nn) |
deda2faa | 2155 | { |
ab4684d1 | 2156 | __be32 verf[2]; |
1da177e4 | 2157 | |
f419992c JL |
2158 | /* |
2159 | * This is opaque to client, so no need to byte-swap. Use | |
2160 | * __force to keep sparse happy | |
2161 | */ | |
2162 | verf[0] = (__force __be32)get_seconds(); | |
19311aa8 | 2163 | verf[1] = (__force __be32)nn->clverifier_counter++; |
ab4684d1 | 2164 | memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); |
1da177e4 LT |
2165 | } |
2166 | ||
294ac32e JL |
2167 | static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn) |
2168 | { | |
2169 | clp->cl_clientid.cl_boot = nn->boot_time; | |
2170 | clp->cl_clientid.cl_id = nn->clientid_counter++; | |
2171 | gen_confirm(clp, nn); | |
2172 | } | |
2173 | ||
4770d722 JL |
2174 | static struct nfs4_stid * |
2175 | find_stateid_locked(struct nfs4_client *cl, stateid_t *t) | |
4581d140 | 2176 | { |
3abdb607 BF |
2177 | struct nfs4_stid *ret; |
2178 | ||
2179 | ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id); | |
2180 | if (!ret || !ret->sc_type) | |
2181 | return NULL; | |
2182 | return ret; | |
4d71ab87 BF |
2183 | } |
2184 | ||
4770d722 JL |
2185 | static struct nfs4_stid * |
2186 | find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) | |
f459e453 BF |
2187 | { |
2188 | struct nfs4_stid *s; | |
4d71ab87 | 2189 | |
4770d722 JL |
2190 | spin_lock(&cl->cl_lock); |
2191 | s = find_stateid_locked(cl, t); | |
2d3f9668 TM |
2192 | if (s != NULL) { |
2193 | if (typemask & s->sc_type) | |
a15dfcd5 | 2194 | refcount_inc(&s->sc_count); |
2d3f9668 TM |
2195 | else |
2196 | s = NULL; | |
2197 | } | |
4770d722 JL |
2198 | spin_unlock(&cl->cl_lock); |
2199 | return s; | |
4581d140 BF |
2200 | } |
2201 | ||
2216d449 | 2202 | static struct nfs4_client *create_client(struct xdr_netobj name, |
b09333c4 RL |
2203 | struct svc_rqst *rqstp, nfs4_verifier *verf) |
2204 | { | |
2205 | struct nfs4_client *clp; | |
2206 | struct sockaddr *sa = svc_addr(rqstp); | |
03a4e1f6 | 2207 | int ret; |
c212cecf | 2208 | struct net *net = SVC_NET(rqstp); |
b09333c4 RL |
2209 | |
2210 | clp = alloc_client(name); | |
2211 | if (clp == NULL) | |
2212 | return NULL; | |
2213 | ||
03a4e1f6 BF |
2214 | ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); |
2215 | if (ret) { | |
03a4e1f6 | 2216 | free_client(clp); |
03a4e1f6 | 2217 | return NULL; |
b09333c4 | 2218 | } |
0162ac2b | 2219 | nfsd4_init_cb(&clp->cl_cb_null, clp, NULL, NFSPROC4_CLNT_CB_NULL); |
07cd4909 | 2220 | clp->cl_time = get_seconds(); |
b09333c4 | 2221 | clear_bit(0, &clp->cl_cb_slot_busy); |
b09333c4 RL |
2222 | copy_verf(clp, verf); |
2223 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
edd76786 | 2224 | clp->cl_cb_session = NULL; |
c212cecf | 2225 | clp->net = net; |
b09333c4 RL |
2226 | return clp; |
2227 | } | |
2228 | ||
fd39ca9a | 2229 | static void |
ac55fdc4 JL |
2230 | add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root) |
2231 | { | |
2232 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
2233 | struct nfs4_client *clp; | |
2234 | ||
2235 | while (*new) { | |
2236 | clp = rb_entry(*new, struct nfs4_client, cl_namenode); | |
2237 | parent = *new; | |
2238 | ||
2239 | if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0) | |
2240 | new = &((*new)->rb_left); | |
2241 | else | |
2242 | new = &((*new)->rb_right); | |
2243 | } | |
2244 | ||
2245 | rb_link_node(&new_clp->cl_namenode, parent, new); | |
2246 | rb_insert_color(&new_clp->cl_namenode, root); | |
2247 | } | |
2248 | ||
2249 | static struct nfs4_client * | |
2250 | find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root) | |
2251 | { | |
ef17af2a | 2252 | int cmp; |
ac55fdc4 JL |
2253 | struct rb_node *node = root->rb_node; |
2254 | struct nfs4_client *clp; | |
2255 | ||
2256 | while (node) { | |
2257 | clp = rb_entry(node, struct nfs4_client, cl_namenode); | |
2258 | cmp = compare_blob(&clp->cl_name, name); | |
2259 | if (cmp > 0) | |
2260 | node = node->rb_left; | |
2261 | else if (cmp < 0) | |
2262 | node = node->rb_right; | |
2263 | else | |
2264 | return clp; | |
2265 | } | |
2266 | return NULL; | |
2267 | } | |
2268 | ||
2269 | static void | |
2270 | add_to_unconfirmed(struct nfs4_client *clp) | |
1da177e4 LT |
2271 | { |
2272 | unsigned int idhashval; | |
0a7ec377 | 2273 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 2274 | |
0a880a28 TM |
2275 | lockdep_assert_held(&nn->client_lock); |
2276 | ||
ac55fdc4 | 2277 | clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
a99454aa | 2278 | add_clp_to_name_tree(clp, &nn->unconf_name_tree); |
1da177e4 | 2279 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
0a7ec377 | 2280 | list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]); |
3dbacee6 | 2281 | renew_client_locked(clp); |
1da177e4 LT |
2282 | } |
2283 | ||
fd39ca9a | 2284 | static void |
1da177e4 LT |
2285 | move_to_confirmed(struct nfs4_client *clp) |
2286 | { | |
2287 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
8daae4dc | 2288 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 2289 | |
0a880a28 TM |
2290 | lockdep_assert_held(&nn->client_lock); |
2291 | ||
1da177e4 | 2292 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); |
8daae4dc | 2293 | list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]); |
a99454aa | 2294 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
382a62e7 | 2295 | add_clp_to_name_tree(clp, &nn->conf_name_tree); |
ac55fdc4 | 2296 | set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
3dbacee6 | 2297 | renew_client_locked(clp); |
1da177e4 LT |
2298 | } |
2299 | ||
2300 | static struct nfs4_client * | |
bfa85e83 | 2301 | find_client_in_id_table(struct list_head *tbl, clientid_t *clid, bool sessions) |
1da177e4 LT |
2302 | { |
2303 | struct nfs4_client *clp; | |
2304 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
2305 | ||
bfa85e83 | 2306 | list_for_each_entry(clp, &tbl[idhashval], cl_idhash) { |
a50d2ad1 | 2307 | if (same_clid(&clp->cl_clientid, clid)) { |
d15c077e BF |
2308 | if ((bool)clp->cl_minorversion != sessions) |
2309 | return NULL; | |
3dbacee6 | 2310 | renew_client_locked(clp); |
1da177e4 | 2311 | return clp; |
a50d2ad1 | 2312 | } |
1da177e4 LT |
2313 | } |
2314 | return NULL; | |
2315 | } | |
2316 | ||
bfa85e83 BF |
2317 | static struct nfs4_client * |
2318 | find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) | |
2319 | { | |
2320 | struct list_head *tbl = nn->conf_id_hashtbl; | |
2321 | ||
0a880a28 | 2322 | lockdep_assert_held(&nn->client_lock); |
bfa85e83 BF |
2323 | return find_client_in_id_table(tbl, clid, sessions); |
2324 | } | |
2325 | ||
1da177e4 | 2326 | static struct nfs4_client * |
0a7ec377 | 2327 | find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
1da177e4 | 2328 | { |
bfa85e83 | 2329 | struct list_head *tbl = nn->unconf_id_hashtbl; |
1da177e4 | 2330 | |
0a880a28 | 2331 | lockdep_assert_held(&nn->client_lock); |
bfa85e83 | 2332 | return find_client_in_id_table(tbl, clid, sessions); |
1da177e4 LT |
2333 | } |
2334 | ||
6e5f15c9 | 2335 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 2336 | { |
6e5f15c9 | 2337 | return clp->cl_exchange_flags != 0; |
e203d506 | 2338 | } |
a1bcecd2 | 2339 | |
28ce6054 | 2340 | static struct nfs4_client * |
382a62e7 | 2341 | find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 2342 | { |
0a880a28 | 2343 | lockdep_assert_held(&nn->client_lock); |
382a62e7 | 2344 | return find_clp_in_name_tree(name, &nn->conf_name_tree); |
28ce6054 N |
2345 | } |
2346 | ||
2347 | static struct nfs4_client * | |
a99454aa | 2348 | find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 2349 | { |
0a880a28 | 2350 | lockdep_assert_held(&nn->client_lock); |
a99454aa | 2351 | return find_clp_in_name_tree(name, &nn->unconf_name_tree); |
28ce6054 N |
2352 | } |
2353 | ||
fd39ca9a | 2354 | static void |
6f3d772f | 2355 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 2356 | { |
07263f1e | 2357 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
2358 | struct sockaddr *sa = svc_addr(rqstp); |
2359 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
2360 | unsigned short expected_family; |
2361 | ||
2362 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
2363 | if (se->se_callback_netid_len == 3 && | |
2364 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
2365 | expected_family = AF_INET; | |
2366 | else if (se->se_callback_netid_len == 4 && | |
2367 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
2368 | expected_family = AF_INET6; | |
2369 | else | |
1da177e4 LT |
2370 | goto out_err; |
2371 | ||
c212cecf | 2372 | conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val, |
aa9a4ec7 | 2373 | se->se_callback_addr_len, |
07263f1e BF |
2374 | (struct sockaddr *)&conn->cb_addr, |
2375 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 2376 | |
07263f1e | 2377 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 2378 | goto out_err; |
aa9a4ec7 | 2379 | |
07263f1e BF |
2380 | if (conn->cb_addr.ss_family == AF_INET6) |
2381 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 2382 | |
07263f1e BF |
2383 | conn->cb_prog = se->se_callback_prog; |
2384 | conn->cb_ident = se->se_callback_ident; | |
849a1cf1 | 2385 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
1da177e4 LT |
2386 | return; |
2387 | out_err: | |
07263f1e BF |
2388 | conn->cb_addr.ss_family = AF_UNSPEC; |
2389 | conn->cb_addrlen = 0; | |
4ab495bf | 2390 | dprintk("NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
2391 | "will not receive delegations\n", |
2392 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
2393 | ||
1da177e4 LT |
2394 | return; |
2395 | } | |
2396 | ||
074fe897 | 2397 | /* |
067e1ace | 2398 | * Cache a reply. nfsd4_check_resp_size() has bounded the cache size. |
074fe897 | 2399 | */ |
b607664e | 2400 | static void |
074fe897 | 2401 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) |
074fe897 | 2402 | { |
f5236013 | 2403 | struct xdr_buf *buf = resp->xdr.buf; |
557ce264 AA |
2404 | struct nfsd4_slot *slot = resp->cstate.slot; |
2405 | unsigned int base; | |
074fe897 | 2406 | |
557ce264 | 2407 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 2408 | |
085def3a | 2409 | slot->sl_flags |= NFSD4_SLOT_INITIALIZED; |
557ce264 AA |
2410 | slot->sl_opcnt = resp->opcnt; |
2411 | slot->sl_status = resp->cstate.status; | |
53da6a53 BF |
2412 | free_svc_cred(&slot->sl_cred); |
2413 | copy_cred(&slot->sl_cred, &resp->rqstp->rq_cred); | |
074fe897 | 2414 | |
085def3a BF |
2415 | if (!nfsd4_cache_this(resp)) { |
2416 | slot->sl_flags &= ~NFSD4_SLOT_CACHED; | |
bf864a31 | 2417 | return; |
074fe897 | 2418 | } |
085def3a BF |
2419 | slot->sl_flags |= NFSD4_SLOT_CACHED; |
2420 | ||
f5236013 BF |
2421 | base = resp->cstate.data_offset; |
2422 | slot->sl_datalen = buf->len - base; | |
2423 | if (read_bytes_from_xdr_buf(buf, base, slot->sl_data, slot->sl_datalen)) | |
d3f03403 DC |
2424 | WARN(1, "%s: sessions DRC could not cache compound\n", |
2425 | __func__); | |
557ce264 | 2426 | return; |
074fe897 AA |
2427 | } |
2428 | ||
2429 | /* | |
abfabf8c AA |
2430 | * Encode the replay sequence operation from the slot values. |
2431 | * If cachethis is FALSE encode the uncached rep error on the next | |
2432 | * operation which sets resp->p and increments resp->opcnt for | |
2433 | * nfs4svc_encode_compoundres. | |
074fe897 | 2434 | * |
074fe897 | 2435 | */ |
abfabf8c AA |
2436 | static __be32 |
2437 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
2438 | struct nfsd4_compoundres *resp) | |
074fe897 | 2439 | { |
abfabf8c AA |
2440 | struct nfsd4_op *op; |
2441 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 2442 | |
abfabf8c AA |
2443 | /* Encode the replayed sequence operation */ |
2444 | op = &args->ops[resp->opcnt - 1]; | |
2445 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 2446 | |
085def3a BF |
2447 | if (slot->sl_flags & NFSD4_SLOT_CACHED) |
2448 | return op->status; | |
2449 | if (args->opcnt == 1) { | |
2450 | /* | |
2451 | * The original operation wasn't a solo sequence--we | |
2452 | * always cache those--so this retry must not match the | |
2453 | * original: | |
2454 | */ | |
2455 | op->status = nfserr_seq_false_retry; | |
2456 | } else { | |
abfabf8c AA |
2457 | op = &args->ops[resp->opcnt++]; |
2458 | op->status = nfserr_retry_uncached_rep; | |
2459 | nfsd4_encode_operation(resp, op); | |
074fe897 | 2460 | } |
abfabf8c | 2461 | return op->status; |
074fe897 AA |
2462 | } |
2463 | ||
2464 | /* | |
557ce264 AA |
2465 | * The sequence operation is not cached because we can use the slot and |
2466 | * session values. | |
074fe897 | 2467 | */ |
3ca2eb98 | 2468 | static __be32 |
bf864a31 AA |
2469 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
2470 | struct nfsd4_sequence *seq) | |
074fe897 | 2471 | { |
557ce264 | 2472 | struct nfsd4_slot *slot = resp->cstate.slot; |
f5236013 BF |
2473 | struct xdr_stream *xdr = &resp->xdr; |
2474 | __be32 *p; | |
074fe897 AA |
2475 | __be32 status; |
2476 | ||
557ce264 | 2477 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 2478 | |
abfabf8c | 2479 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); |
0da7b19c | 2480 | if (status) |
abfabf8c | 2481 | return status; |
074fe897 | 2482 | |
f5236013 BF |
2483 | p = xdr_reserve_space(xdr, slot->sl_datalen); |
2484 | if (!p) { | |
2485 | WARN_ON_ONCE(1); | |
2486 | return nfserr_serverfault; | |
2487 | } | |
2488 | xdr_encode_opaque_fixed(p, slot->sl_data, slot->sl_datalen); | |
2489 | xdr_commit_encode(xdr); | |
074fe897 | 2490 | |
557ce264 | 2491 | resp->opcnt = slot->sl_opcnt; |
f5236013 | 2492 | return slot->sl_status; |
074fe897 AA |
2493 | } |
2494 | ||
0733d213 AA |
2495 | /* |
2496 | * Set the exchange_id flags returned by the server. | |
2497 | */ | |
2498 | static void | |
2499 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
2500 | { | |
9cf514cc CH |
2501 | #ifdef CONFIG_NFSD_PNFS |
2502 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_PNFS_MDS; | |
2503 | #else | |
0733d213 | 2504 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; |
9cf514cc | 2505 | #endif |
0733d213 AA |
2506 | |
2507 | /* Referrals are supported, Migration is not. */ | |
2508 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
2509 | ||
2510 | /* set the wire flags to return to client. */ | |
2511 | clid->flags = new->cl_exchange_flags; | |
2512 | } | |
2513 | ||
4eaea134 BF |
2514 | static bool client_has_openowners(struct nfs4_client *clp) |
2515 | { | |
2516 | struct nfs4_openowner *oo; | |
2517 | ||
2518 | list_for_each_entry(oo, &clp->cl_openowners, oo_perclient) { | |
2519 | if (!list_empty(&oo->oo_owner.so_stateids)) | |
2520 | return true; | |
2521 | } | |
2522 | return false; | |
2523 | } | |
2524 | ||
631fc9ea BF |
2525 | static bool client_has_state(struct nfs4_client *clp) |
2526 | { | |
4eaea134 | 2527 | return client_has_openowners(clp) |
47e970be KM |
2528 | #ifdef CONFIG_NFSD_PNFS |
2529 | || !list_empty(&clp->cl_lo_states) | |
2530 | #endif | |
6eccece9 | 2531 | || !list_empty(&clp->cl_delegations) |
e0639dc5 OK |
2532 | || !list_empty(&clp->cl_sessions) |
2533 | || !list_empty(&clp->async_copies); | |
631fc9ea BF |
2534 | } |
2535 | ||
069b6ad4 | 2536 | __be32 |
eb69853d CH |
2537 | nfsd4_exchange_id(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2538 | union nfsd4_op_u *u) | |
069b6ad4 | 2539 | { |
eb69853d | 2540 | struct nfsd4_exchange_id *exid = &u->exchange_id; |
3dbacee6 TM |
2541 | struct nfs4_client *conf, *new; |
2542 | struct nfs4_client *unconf = NULL; | |
57b7b43b | 2543 | __be32 status; |
363168b4 | 2544 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 2545 | nfs4_verifier verf = exid->verifier; |
363168b4 | 2546 | struct sockaddr *sa = svc_addr(rqstp); |
83e08fd4 | 2547 | bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; |
c212cecf | 2548 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
0733d213 | 2549 | |
363168b4 | 2550 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 2551 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 2552 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 2553 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 2554 | addr_str, exid->flags, exid->spa_how); |
0733d213 | 2555 | |
a084daf5 | 2556 | if (exid->flags & ~EXCHGID4_FLAG_MASK_A) |
0733d213 AA |
2557 | return nfserr_inval; |
2558 | ||
50c7b948 BF |
2559 | new = create_client(exid->clname, rqstp, &verf); |
2560 | if (new == NULL) | |
2561 | return nfserr_jukebox; | |
2562 | ||
0733d213 | 2563 | switch (exid->spa_how) { |
57266a6e | 2564 | case SP4_MACH_CRED: |
ed941643 AE |
2565 | exid->spo_must_enforce[0] = 0; |
2566 | exid->spo_must_enforce[1] = ( | |
2567 | 1 << (OP_BIND_CONN_TO_SESSION - 32) | | |
2568 | 1 << (OP_EXCHANGE_ID - 32) | | |
2569 | 1 << (OP_CREATE_SESSION - 32) | | |
2570 | 1 << (OP_DESTROY_SESSION - 32) | | |
2571 | 1 << (OP_DESTROY_CLIENTID - 32)); | |
2572 | ||
2573 | exid->spo_must_allow[0] &= (1 << (OP_CLOSE) | | |
2574 | 1 << (OP_OPEN_DOWNGRADE) | | |
2575 | 1 << (OP_LOCKU) | | |
2576 | 1 << (OP_DELEGRETURN)); | |
2577 | ||
2578 | exid->spo_must_allow[1] &= ( | |
2579 | 1 << (OP_TEST_STATEID - 32) | | |
2580 | 1 << (OP_FREE_STATEID - 32)); | |
50c7b948 BF |
2581 | if (!svc_rqst_integrity_protected(rqstp)) { |
2582 | status = nfserr_inval; | |
2583 | goto out_nolock; | |
920dd9bb BF |
2584 | } |
2585 | /* | |
2586 | * Sometimes userspace doesn't give us a principal. | |
2587 | * Which is a bug, really. Anyway, we can't enforce | |
2588 | * MACH_CRED in that case, better to give up now: | |
2589 | */ | |
414ca017 BF |
2590 | if (!new->cl_cred.cr_principal && |
2591 | !new->cl_cred.cr_raw_principal) { | |
920dd9bb BF |
2592 | status = nfserr_serverfault; |
2593 | goto out_nolock; | |
50c7b948 BF |
2594 | } |
2595 | new->cl_mach_cred = true; | |
0733d213 AA |
2596 | case SP4_NONE: |
2597 | break; | |
063b0fb9 BF |
2598 | default: /* checked by xdr code */ |
2599 | WARN_ON_ONCE(1); | |
0a4c9265 | 2600 | /* fall through */ |
0733d213 | 2601 | case SP4_SSV: |
8edf4b02 KM |
2602 | status = nfserr_encr_alg_unsupp; |
2603 | goto out_nolock; | |
0733d213 AA |
2604 | } |
2605 | ||
2dbb269d | 2606 | /* Cases below refer to rfc 5661 section 18.35.4: */ |
3dbacee6 | 2607 | spin_lock(&nn->client_lock); |
382a62e7 | 2608 | conf = find_confirmed_client_by_name(&exid->clname, nn); |
0733d213 | 2609 | if (conf) { |
83e08fd4 BF |
2610 | bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); |
2611 | bool verfs_match = same_verf(&verf, &conf->cl_verifier); | |
2612 | ||
136e658d BF |
2613 | if (update) { |
2614 | if (!clp_used_exchangeid(conf)) { /* buggy client */ | |
2dbb269d | 2615 | status = nfserr_inval; |
1a308118 BF |
2616 | goto out; |
2617 | } | |
dedeb13f | 2618 | if (!nfsd4_mach_creds_match(conf, rqstp)) { |
57266a6e BF |
2619 | status = nfserr_wrong_cred; |
2620 | goto out; | |
2621 | } | |
136e658d | 2622 | if (!creds_match) { /* case 9 */ |
ea236d07 | 2623 | status = nfserr_perm; |
136e658d BF |
2624 | goto out; |
2625 | } | |
2626 | if (!verfs_match) { /* case 8 */ | |
0733d213 AA |
2627 | status = nfserr_not_same; |
2628 | goto out; | |
2629 | } | |
136e658d BF |
2630 | /* case 6 */ |
2631 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
136e658d | 2632 | goto out_copy; |
0733d213 | 2633 | } |
136e658d | 2634 | if (!creds_match) { /* case 3 */ |
631fc9ea BF |
2635 | if (client_has_state(conf)) { |
2636 | status = nfserr_clid_inuse; | |
0733d213 AA |
2637 | goto out; |
2638 | } | |
0733d213 AA |
2639 | goto out_new; |
2640 | } | |
136e658d | 2641 | if (verfs_match) { /* case 2 */ |
0f1ba0ef | 2642 | conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; |
136e658d BF |
2643 | goto out_copy; |
2644 | } | |
2645 | /* case 5, client reboot */ | |
3dbacee6 | 2646 | conf = NULL; |
136e658d | 2647 | goto out_new; |
6ddbbbfe MS |
2648 | } |
2649 | ||
2dbb269d | 2650 | if (update) { /* case 7 */ |
6ddbbbfe MS |
2651 | status = nfserr_noent; |
2652 | goto out; | |
0733d213 AA |
2653 | } |
2654 | ||
a99454aa | 2655 | unconf = find_unconfirmed_client_by_name(&exid->clname, nn); |
2dbb269d | 2656 | if (unconf) /* case 4, possible retry or client restart */ |
3dbacee6 | 2657 | unhash_client_locked(unconf); |
0733d213 | 2658 | |
2dbb269d | 2659 | /* case 1 (normal case) */ |
0733d213 | 2660 | out_new: |
fd699b8a JL |
2661 | if (conf) { |
2662 | status = mark_client_expired_locked(conf); | |
2663 | if (status) | |
2664 | goto out; | |
2665 | } | |
4f540e29 | 2666 | new->cl_minorversion = cstate->minorversion; |
ed941643 AE |
2667 | new->cl_spo_must_allow.u.words[0] = exid->spo_must_allow[0]; |
2668 | new->cl_spo_must_allow.u.words[1] = exid->spo_must_allow[1]; | |
0733d213 | 2669 | |
c212cecf | 2670 | gen_clid(new, nn); |
ac55fdc4 | 2671 | add_to_unconfirmed(new); |
3dbacee6 | 2672 | swap(new, conf); |
0733d213 | 2673 | out_copy: |
5cc40fd7 TM |
2674 | exid->clientid.cl_boot = conf->cl_clientid.cl_boot; |
2675 | exid->clientid.cl_id = conf->cl_clientid.cl_id; | |
0733d213 | 2676 | |
5cc40fd7 TM |
2677 | exid->seqid = conf->cl_cs_slot.sl_seqid + 1; |
2678 | nfsd4_set_ex_flags(conf, exid); | |
0733d213 AA |
2679 | |
2680 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
5cc40fd7 | 2681 | conf->cl_cs_slot.sl_seqid, conf->cl_exchange_flags); |
0733d213 AA |
2682 | status = nfs_ok; |
2683 | ||
2684 | out: | |
3dbacee6 | 2685 | spin_unlock(&nn->client_lock); |
50c7b948 | 2686 | out_nolock: |
5cc40fd7 | 2687 | if (new) |
3dbacee6 TM |
2688 | expire_client(new); |
2689 | if (unconf) | |
2690 | expire_client(unconf); | |
0733d213 | 2691 | return status; |
069b6ad4 AA |
2692 | } |
2693 | ||
57b7b43b | 2694 | static __be32 |
88e588d5 | 2695 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 2696 | { |
88e588d5 AA |
2697 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
2698 | slot_seqid); | |
b85d4c01 BH |
2699 | |
2700 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
2701 | if (slot_inuse) { |
2702 | if (seqid == slot_seqid) | |
b85d4c01 BH |
2703 | return nfserr_jukebox; |
2704 | else | |
2705 | return nfserr_seq_misordered; | |
2706 | } | |
f6d82485 | 2707 | /* Note unsigned 32-bit arithmetic handles wraparound: */ |
88e588d5 | 2708 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 | 2709 | return nfs_ok; |
88e588d5 | 2710 | if (seqid == slot_seqid) |
b85d4c01 | 2711 | return nfserr_replay_cache; |
b85d4c01 BH |
2712 | return nfserr_seq_misordered; |
2713 | } | |
2714 | ||
49557cc7 AA |
2715 | /* |
2716 | * Cache the create session result into the create session single DRC | |
2717 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
2718 | * Do this for solo or embedded create session operations. | |
2719 | */ | |
2720 | static void | |
2721 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
57b7b43b | 2722 | struct nfsd4_clid_slot *slot, __be32 nfserr) |
49557cc7 AA |
2723 | { |
2724 | slot->sl_status = nfserr; | |
2725 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
2726 | } | |
2727 | ||
2728 | static __be32 | |
2729 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
2730 | struct nfsd4_clid_slot *slot) | |
2731 | { | |
2732 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
2733 | return slot->sl_status; | |
2734 | } | |
2735 | ||
1b74c25b MJ |
2736 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
2737 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
2738 | 1 + /* MIN tag is length with zero, only length */ \ | |
2739 | 3 + /* version, opcount, opcode */ \ | |
2740 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
2741 | /* seqid, slotID, slotID, cache */ \ | |
2742 | 4 ) * sizeof(__be32)) | |
2743 | ||
2744 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
2745 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
2746 | 1 + /* status */ \ | |
2747 | 1 + /* MIN tag is length with zero, only length */ \ | |
2748 | 3 + /* opcount, opcode, opstatus*/ \ | |
2749 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
2750 | /* seqid, slotID, slotID, slotID, status */ \ | |
2751 | 5 ) * sizeof(__be32)) | |
2752 | ||
55c760cf | 2753 | static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs *ca, struct nfsd_net *nn) |
1b74c25b | 2754 | { |
55c760cf BF |
2755 | u32 maxrpc = nn->nfsd_serv->sv_max_mesg; |
2756 | ||
373cd409 BF |
2757 | if (ca->maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ) |
2758 | return nfserr_toosmall; | |
2759 | if (ca->maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ) | |
2760 | return nfserr_toosmall; | |
55c760cf BF |
2761 | ca->headerpadsz = 0; |
2762 | ca->maxreq_sz = min_t(u32, ca->maxreq_sz, maxrpc); | |
2763 | ca->maxresp_sz = min_t(u32, ca->maxresp_sz, maxrpc); | |
2764 | ca->maxops = min_t(u32, ca->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
2765 | ca->maxresp_cached = min_t(u32, ca->maxresp_cached, | |
2766 | NFSD_SLOT_CACHE_SIZE + NFSD_MIN_HDR_SEQ_SZ); | |
2767 | ca->maxreqs = min_t(u32, ca->maxreqs, NFSD_MAX_SLOTS_PER_SESSION); | |
2768 | /* | |
2769 | * Note decreasing slot size below client's request may make it | |
2770 | * difficult for client to function correctly, whereas | |
2771 | * decreasing the number of slots will (just?) affect | |
2772 | * performance. When short on memory we therefore prefer to | |
2773 | * decrease number of slots instead of their size. Clients that | |
2774 | * request larger slots than they need will get poor results: | |
2775 | */ | |
2776 | ca->maxreqs = nfsd4_get_drc_mem(ca); | |
2777 | if (!ca->maxreqs) | |
2778 | return nfserr_jukebox; | |
2779 | ||
373cd409 | 2780 | return nfs_ok; |
1b74c25b MJ |
2781 | } |
2782 | ||
4500632f CL |
2783 | /* |
2784 | * Server's NFSv4.1 backchannel support is AUTH_SYS-only for now. | |
2785 | * These are based on similar macros in linux/sunrpc/msg_prot.h . | |
2786 | */ | |
2787 | #define RPC_MAX_HEADER_WITH_AUTH_SYS \ | |
2788 | (RPC_CALLHDRSIZE + 2 * (2 + UNX_CALLSLACK)) | |
2789 | ||
2790 | #define RPC_MAX_REPHEADER_WITH_AUTH_SYS \ | |
2791 | (RPC_REPHDRSIZE + (2 + NUL_REPLYSLACK)) | |
2792 | ||
8a891633 | 2793 | #define NFSD_CB_MAX_REQ_SZ ((NFS4_enc_cb_recall_sz + \ |
4500632f | 2794 | RPC_MAX_HEADER_WITH_AUTH_SYS) * sizeof(__be32)) |
8a891633 | 2795 | #define NFSD_CB_MAX_RESP_SZ ((NFS4_dec_cb_recall_sz + \ |
4500632f CL |
2796 | RPC_MAX_REPHEADER_WITH_AUTH_SYS) * \ |
2797 | sizeof(__be32)) | |
8a891633 | 2798 | |
06b332a5 | 2799 | static __be32 check_backchannel_attrs(struct nfsd4_channel_attrs *ca) |
1b74c25b | 2800 | { |
06b332a5 BF |
2801 | ca->headerpadsz = 0; |
2802 | ||
8a891633 | 2803 | if (ca->maxreq_sz < NFSD_CB_MAX_REQ_SZ) |
06b332a5 | 2804 | return nfserr_toosmall; |
8a891633 | 2805 | if (ca->maxresp_sz < NFSD_CB_MAX_RESP_SZ) |
06b332a5 BF |
2806 | return nfserr_toosmall; |
2807 | ca->maxresp_cached = 0; | |
2808 | if (ca->maxops < 2) | |
2809 | return nfserr_toosmall; | |
2810 | ||
2811 | return nfs_ok; | |
1b74c25b MJ |
2812 | } |
2813 | ||
b78724b7 BF |
2814 | static __be32 nfsd4_check_cb_sec(struct nfsd4_cb_sec *cbs) |
2815 | { | |
2816 | switch (cbs->flavor) { | |
2817 | case RPC_AUTH_NULL: | |
2818 | case RPC_AUTH_UNIX: | |
2819 | return nfs_ok; | |
2820 | default: | |
2821 | /* | |
2822 | * GSS case: the spec doesn't allow us to return this | |
2823 | * error. But it also doesn't allow us not to support | |
2824 | * GSS. | |
2825 | * I'd rather this fail hard than return some error the | |
2826 | * client might think it can already handle: | |
2827 | */ | |
2828 | return nfserr_encr_alg_unsupp; | |
2829 | } | |
2830 | } | |
2831 | ||
069b6ad4 AA |
2832 | __be32 |
2833 | nfsd4_create_session(struct svc_rqst *rqstp, | |
eb69853d | 2834 | struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) |
069b6ad4 | 2835 | { |
eb69853d | 2836 | struct nfsd4_create_session *cr_ses = &u->create_session; |
363168b4 | 2837 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 2838 | struct nfs4_client *conf, *unconf; |
d20c11d8 | 2839 | struct nfs4_client *old = NULL; |
ac7c46f2 | 2840 | struct nfsd4_session *new; |
81f0b2a4 | 2841 | struct nfsd4_conn *conn; |
49557cc7 | 2842 | struct nfsd4_clid_slot *cs_slot = NULL; |
57b7b43b | 2843 | __be32 status = 0; |
8daae4dc | 2844 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
ec6b5d7b | 2845 | |
a62573dc MJ |
2846 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
2847 | return nfserr_inval; | |
b78724b7 BF |
2848 | status = nfsd4_check_cb_sec(&cr_ses->cb_sec); |
2849 | if (status) | |
2850 | return status; | |
55c760cf | 2851 | status = check_forechannel_attrs(&cr_ses->fore_channel, nn); |
06b332a5 BF |
2852 | if (status) |
2853 | return status; | |
2854 | status = check_backchannel_attrs(&cr_ses->back_channel); | |
373cd409 | 2855 | if (status) |
f403e450 | 2856 | goto out_release_drc_mem; |
81f0b2a4 | 2857 | status = nfserr_jukebox; |
60810e54 | 2858 | new = alloc_session(&cr_ses->fore_channel, &cr_ses->back_channel); |
55c760cf BF |
2859 | if (!new) |
2860 | goto out_release_drc_mem; | |
81f0b2a4 BF |
2861 | conn = alloc_conn_from_crses(rqstp, cr_ses); |
2862 | if (!conn) | |
2863 | goto out_free_session; | |
a62573dc | 2864 | |
d20c11d8 | 2865 | spin_lock(&nn->client_lock); |
0a7ec377 | 2866 | unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn); |
8daae4dc | 2867 | conf = find_confirmed_client(&cr_ses->clientid, true, nn); |
78389046 | 2868 | WARN_ON_ONCE(conf && unconf); |
ec6b5d7b AA |
2869 | |
2870 | if (conf) { | |
57266a6e | 2871 | status = nfserr_wrong_cred; |
dedeb13f | 2872 | if (!nfsd4_mach_creds_match(conf, rqstp)) |
57266a6e | 2873 | goto out_free_conn; |
49557cc7 AA |
2874 | cs_slot = &conf->cl_cs_slot; |
2875 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
f5e22bb6 KM |
2876 | if (status) { |
2877 | if (status == nfserr_replay_cache) | |
2878 | status = nfsd4_replay_create_session(cr_ses, cs_slot); | |
81f0b2a4 | 2879 | goto out_free_conn; |
ec6b5d7b | 2880 | } |
ec6b5d7b AA |
2881 | } else if (unconf) { |
2882 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || | |
363168b4 | 2883 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b | 2884 | status = nfserr_clid_inuse; |
81f0b2a4 | 2885 | goto out_free_conn; |
ec6b5d7b | 2886 | } |
57266a6e | 2887 | status = nfserr_wrong_cred; |
dedeb13f | 2888 | if (!nfsd4_mach_creds_match(unconf, rqstp)) |
57266a6e | 2889 | goto out_free_conn; |
49557cc7 AA |
2890 | cs_slot = &unconf->cl_cs_slot; |
2891 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
2892 | if (status) { |
2893 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 2894 | status = nfserr_seq_misordered; |
81f0b2a4 | 2895 | goto out_free_conn; |
ec6b5d7b | 2896 | } |
382a62e7 | 2897 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
221a6876 | 2898 | if (old) { |
d20c11d8 | 2899 | status = mark_client_expired_locked(old); |
7abea1e8 JL |
2900 | if (status) { |
2901 | old = NULL; | |
221a6876 | 2902 | goto out_free_conn; |
7abea1e8 | 2903 | } |
221a6876 | 2904 | } |
8f9d3d3b | 2905 | move_to_confirmed(unconf); |
ec6b5d7b AA |
2906 | conf = unconf; |
2907 | } else { | |
2908 | status = nfserr_stale_clientid; | |
81f0b2a4 | 2909 | goto out_free_conn; |
ec6b5d7b | 2910 | } |
81f0b2a4 | 2911 | status = nfs_ok; |
4ce85c8c | 2912 | /* Persistent sessions are not supported */ |
408b79bc | 2913 | cr_ses->flags &= ~SESSION4_PERSIST; |
4ce85c8c | 2914 | /* Upshifting from TCP to RDMA is not supported */ |
408b79bc BF |
2915 | cr_ses->flags &= ~SESSION4_RDMA; |
2916 | ||
81f0b2a4 | 2917 | init_session(rqstp, new, conf, cr_ses); |
d20c11d8 | 2918 | nfsd4_get_session_locked(new); |
81f0b2a4 | 2919 | |
ac7c46f2 | 2920 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, |
ec6b5d7b | 2921 | NFS4_MAX_SESSIONID_LEN); |
86c3e16c | 2922 | cs_slot->sl_seqid++; |
49557cc7 | 2923 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 2924 | |
d20c11d8 | 2925 | /* cache solo and embedded create sessions under the client_lock */ |
49557cc7 | 2926 | nfsd4_cache_create_session(cr_ses, cs_slot, status); |
d20c11d8 JL |
2927 | spin_unlock(&nn->client_lock); |
2928 | /* init connection and backchannel */ | |
2929 | nfsd4_init_conn(rqstp, conn, new); | |
2930 | nfsd4_put_session(new); | |
d20c11d8 JL |
2931 | if (old) |
2932 | expire_client(old); | |
ec6b5d7b | 2933 | return status; |
81f0b2a4 | 2934 | out_free_conn: |
d20c11d8 | 2935 | spin_unlock(&nn->client_lock); |
81f0b2a4 | 2936 | free_conn(conn); |
d20c11d8 JL |
2937 | if (old) |
2938 | expire_client(old); | |
81f0b2a4 BF |
2939 | out_free_session: |
2940 | __free_session(new); | |
55c760cf BF |
2941 | out_release_drc_mem: |
2942 | nfsd4_put_drc_mem(&cr_ses->fore_channel); | |
1ca50792 | 2943 | return status; |
069b6ad4 AA |
2944 | } |
2945 | ||
1d1bc8f2 BF |
2946 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
2947 | { | |
2948 | switch (*dir) { | |
2949 | case NFS4_CDFC4_FORE: | |
2950 | case NFS4_CDFC4_BACK: | |
2951 | return nfs_ok; | |
2952 | case NFS4_CDFC4_FORE_OR_BOTH: | |
2953 | case NFS4_CDFC4_BACK_OR_BOTH: | |
2954 | *dir = NFS4_CDFC4_BOTH; | |
2955 | return nfs_ok; | |
2956 | }; | |
2957 | return nfserr_inval; | |
2958 | } | |
2959 | ||
eb69853d CH |
2960 | __be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, |
2961 | struct nfsd4_compound_state *cstate, | |
2962 | union nfsd4_op_u *u) | |
cb73a9f4 | 2963 | { |
eb69853d | 2964 | struct nfsd4_backchannel_ctl *bc = &u->backchannel_ctl; |
cb73a9f4 | 2965 | struct nfsd4_session *session = cstate->session; |
c9a49628 | 2966 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
b78724b7 | 2967 | __be32 status; |
cb73a9f4 | 2968 | |
b78724b7 BF |
2969 | status = nfsd4_check_cb_sec(&bc->bc_cb_sec); |
2970 | if (status) | |
2971 | return status; | |
c9a49628 | 2972 | spin_lock(&nn->client_lock); |
cb73a9f4 BF |
2973 | session->se_cb_prog = bc->bc_cb_program; |
2974 | session->se_cb_sec = bc->bc_cb_sec; | |
c9a49628 | 2975 | spin_unlock(&nn->client_lock); |
cb73a9f4 BF |
2976 | |
2977 | nfsd4_probe_callback(session->se_client); | |
2978 | ||
2979 | return nfs_ok; | |
2980 | } | |
2981 | ||
1d1bc8f2 BF |
2982 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, |
2983 | struct nfsd4_compound_state *cstate, | |
eb69853d | 2984 | union nfsd4_op_u *u) |
1d1bc8f2 | 2985 | { |
eb69853d | 2986 | struct nfsd4_bind_conn_to_session *bcts = &u->bind_conn_to_session; |
1d1bc8f2 | 2987 | __be32 status; |
3ba63671 | 2988 | struct nfsd4_conn *conn; |
4f6e6c17 | 2989 | struct nfsd4_session *session; |
d4e19e70 TM |
2990 | struct net *net = SVC_NET(rqstp); |
2991 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1d1bc8f2 BF |
2992 | |
2993 | if (!nfsd4_last_compound_op(rqstp)) | |
2994 | return nfserr_not_only_op; | |
c9a49628 | 2995 | spin_lock(&nn->client_lock); |
d4e19e70 | 2996 | session = find_in_sessionid_hashtbl(&bcts->sessionid, net, &status); |
c9a49628 | 2997 | spin_unlock(&nn->client_lock); |
4f6e6c17 | 2998 | if (!session) |
d4e19e70 | 2999 | goto out_no_session; |
57266a6e | 3000 | status = nfserr_wrong_cred; |
dedeb13f | 3001 | if (!nfsd4_mach_creds_match(session->se_client, rqstp)) |
57266a6e | 3002 | goto out; |
1d1bc8f2 | 3003 | status = nfsd4_map_bcts_dir(&bcts->dir); |
3ba63671 | 3004 | if (status) |
4f6e6c17 | 3005 | goto out; |
3ba63671 | 3006 | conn = alloc_conn(rqstp, bcts->dir); |
4f6e6c17 | 3007 | status = nfserr_jukebox; |
3ba63671 | 3008 | if (!conn) |
4f6e6c17 BF |
3009 | goto out; |
3010 | nfsd4_init_conn(rqstp, conn, session); | |
3011 | status = nfs_ok; | |
3012 | out: | |
d4e19e70 TM |
3013 | nfsd4_put_session(session); |
3014 | out_no_session: | |
4f6e6c17 | 3015 | return status; |
1d1bc8f2 BF |
3016 | } |
3017 | ||
665d5072 | 3018 | static bool nfsd4_compound_in_session(struct nfsd4_compound_state *cstate, struct nfs4_sessionid *sid) |
5d4cec2f | 3019 | { |
665d5072 | 3020 | if (!cstate->session) |
51d87bc2 | 3021 | return false; |
665d5072 | 3022 | return !memcmp(sid, &cstate->session->se_sessionid, sizeof(*sid)); |
5d4cec2f BF |
3023 | } |
3024 | ||
069b6ad4 | 3025 | __be32 |
eb69853d CH |
3026 | nfsd4_destroy_session(struct svc_rqst *r, struct nfsd4_compound_state *cstate, |
3027 | union nfsd4_op_u *u) | |
069b6ad4 | 3028 | { |
ca0552f4 | 3029 | struct nfs4_sessionid *sessionid = &u->destroy_session.sessionid; |
e10e0cfc | 3030 | struct nfsd4_session *ses; |
abcdff09 | 3031 | __be32 status; |
f0f51f5c | 3032 | int ref_held_by_me = 0; |
d4e19e70 TM |
3033 | struct net *net = SVC_NET(r); |
3034 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
e10e0cfc | 3035 | |
abcdff09 | 3036 | status = nfserr_not_only_op; |
ca0552f4 | 3037 | if (nfsd4_compound_in_session(cstate, sessionid)) { |
57716355 | 3038 | if (!nfsd4_last_compound_op(r)) |
abcdff09 | 3039 | goto out; |
f0f51f5c | 3040 | ref_held_by_me++; |
57716355 | 3041 | } |
ca0552f4 | 3042 | dump_sessionid(__func__, sessionid); |
c9a49628 | 3043 | spin_lock(&nn->client_lock); |
ca0552f4 | 3044 | ses = find_in_sessionid_hashtbl(sessionid, net, &status); |
abcdff09 BF |
3045 | if (!ses) |
3046 | goto out_client_lock; | |
57266a6e | 3047 | status = nfserr_wrong_cred; |
dedeb13f | 3048 | if (!nfsd4_mach_creds_match(ses->se_client, r)) |
d4e19e70 | 3049 | goto out_put_session; |
f0f51f5c | 3050 | status = mark_session_dead_locked(ses, 1 + ref_held_by_me); |
66b2b9b2 | 3051 | if (status) |
f0f51f5c | 3052 | goto out_put_session; |
e10e0cfc | 3053 | unhash_session(ses); |
c9a49628 | 3054 | spin_unlock(&nn->client_lock); |
e10e0cfc | 3055 | |
84f5f7cc | 3056 | nfsd4_probe_callback_sync(ses->se_client); |
19cf5c02 | 3057 | |
c9a49628 | 3058 | spin_lock(&nn->client_lock); |
e10e0cfc | 3059 | status = nfs_ok; |
f0f51f5c | 3060 | out_put_session: |
d4e19e70 | 3061 | nfsd4_put_session_locked(ses); |
abcdff09 BF |
3062 | out_client_lock: |
3063 | spin_unlock(&nn->client_lock); | |
e10e0cfc | 3064 | out: |
e10e0cfc | 3065 | return status; |
069b6ad4 AA |
3066 | } |
3067 | ||
a663bdd8 | 3068 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
3069 | { |
3070 | struct nfsd4_conn *c; | |
3071 | ||
3072 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 3073 | if (c->cn_xprt == xpt) { |
328ead28 BF |
3074 | return c; |
3075 | } | |
3076 | } | |
3077 | return NULL; | |
3078 | } | |
3079 | ||
57266a6e | 3080 | static __be32 nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
3081 | { |
3082 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 3083 | struct nfsd4_conn *c; |
57266a6e | 3084 | __be32 status = nfs_ok; |
21b75b01 | 3085 | int ret; |
328ead28 BF |
3086 | |
3087 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 3088 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
57266a6e BF |
3089 | if (c) |
3090 | goto out_free; | |
3091 | status = nfserr_conn_not_bound_to_session; | |
3092 | if (clp->cl_mach_cred) | |
3093 | goto out_free; | |
328ead28 BF |
3094 | __nfsd4_hash_conn(new, ses); |
3095 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
3096 | ret = nfsd4_register_conn(new); |
3097 | if (ret) | |
3098 | /* oops; xprt is already down: */ | |
3099 | nfsd4_conn_lost(&new->cn_xpt_user); | |
57266a6e BF |
3100 | return nfs_ok; |
3101 | out_free: | |
3102 | spin_unlock(&clp->cl_lock); | |
3103 | free_conn(new); | |
3104 | return status; | |
328ead28 BF |
3105 | } |
3106 | ||
868b89c3 MJ |
3107 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
3108 | { | |
3109 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
3110 | ||
3111 | return args->opcnt > session->se_fchannel.maxops; | |
3112 | } | |
3113 | ||
ae82a8d0 MJ |
3114 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
3115 | struct nfsd4_session *session) | |
3116 | { | |
3117 | struct xdr_buf *xb = &rqstp->rq_arg; | |
3118 | ||
3119 | return xb->len > session->se_fchannel.maxreq_sz; | |
3120 | } | |
3121 | ||
53da6a53 BF |
3122 | static bool replay_matches_cache(struct svc_rqst *rqstp, |
3123 | struct nfsd4_sequence *seq, struct nfsd4_slot *slot) | |
3124 | { | |
3125 | struct nfsd4_compoundargs *argp = rqstp->rq_argp; | |
3126 | ||
3127 | if ((bool)(slot->sl_flags & NFSD4_SLOT_CACHETHIS) != | |
3128 | (bool)seq->cachethis) | |
3129 | return false; | |
3130 | /* | |
3131 | * If there's an error than the reply can have fewer ops than | |
3132 | * the call. But if we cached a reply with *more* ops than the | |
3133 | * call you're sending us now, then this new call is clearly not | |
3134 | * really a replay of the old one: | |
3135 | */ | |
3136 | if (slot->sl_opcnt < argp->opcnt) | |
3137 | return false; | |
3138 | /* This is the only check explicitly called by spec: */ | |
3139 | if (!same_creds(&rqstp->rq_cred, &slot->sl_cred)) | |
3140 | return false; | |
3141 | /* | |
3142 | * There may be more comparisons we could actually do, but the | |
3143 | * spec doesn't require us to catch every case where the calls | |
3144 | * don't match (that would require caching the call as well as | |
3145 | * the reply), so we don't bother. | |
3146 | */ | |
3147 | return true; | |
3148 | } | |
3149 | ||
069b6ad4 | 3150 | __be32 |
eb69853d CH |
3151 | nfsd4_sequence(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3152 | union nfsd4_op_u *u) | |
069b6ad4 | 3153 | { |
eb69853d | 3154 | struct nfsd4_sequence *seq = &u->sequence; |
f9bb94c4 | 3155 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
47ee5298 | 3156 | struct xdr_stream *xdr = &resp->xdr; |
b85d4c01 | 3157 | struct nfsd4_session *session; |
221a6876 | 3158 | struct nfs4_client *clp; |
b85d4c01 | 3159 | struct nfsd4_slot *slot; |
a663bdd8 | 3160 | struct nfsd4_conn *conn; |
57b7b43b | 3161 | __be32 status; |
47ee5298 | 3162 | int buflen; |
d4e19e70 TM |
3163 | struct net *net = SVC_NET(rqstp); |
3164 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
b85d4c01 | 3165 | |
f9bb94c4 AA |
3166 | if (resp->opcnt != 1) |
3167 | return nfserr_sequence_pos; | |
3168 | ||
a663bdd8 BF |
3169 | /* |
3170 | * Will be either used or freed by nfsd4_sequence_check_conn | |
3171 | * below. | |
3172 | */ | |
3173 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
3174 | if (!conn) | |
3175 | return nfserr_jukebox; | |
3176 | ||
c9a49628 | 3177 | spin_lock(&nn->client_lock); |
d4e19e70 | 3178 | session = find_in_sessionid_hashtbl(&seq->sessionid, net, &status); |
b85d4c01 | 3179 | if (!session) |
221a6876 BF |
3180 | goto out_no_session; |
3181 | clp = session->se_client; | |
b85d4c01 | 3182 | |
868b89c3 MJ |
3183 | status = nfserr_too_many_ops; |
3184 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
66b2b9b2 | 3185 | goto out_put_session; |
868b89c3 | 3186 | |
ae82a8d0 MJ |
3187 | status = nfserr_req_too_big; |
3188 | if (nfsd4_request_too_big(rqstp, session)) | |
66b2b9b2 | 3189 | goto out_put_session; |
ae82a8d0 | 3190 | |
b85d4c01 | 3191 | status = nfserr_badslot; |
6c18ba9f | 3192 | if (seq->slotid >= session->se_fchannel.maxreqs) |
66b2b9b2 | 3193 | goto out_put_session; |
b85d4c01 | 3194 | |
557ce264 | 3195 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
3196 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
3197 | ||
a8dfdaeb AA |
3198 | /* We do not negotiate the number of slots yet, so set the |
3199 | * maxslots to the session maxreqs which is used to encode | |
3200 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
3201 | seq->maxslots = session->se_fchannel.maxreqs; | |
3202 | ||
73e79482 BF |
3203 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, |
3204 | slot->sl_flags & NFSD4_SLOT_INUSE); | |
b85d4c01 | 3205 | if (status == nfserr_replay_cache) { |
bf5c43c8 BF |
3206 | status = nfserr_seq_misordered; |
3207 | if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) | |
66b2b9b2 | 3208 | goto out_put_session; |
53da6a53 BF |
3209 | status = nfserr_seq_false_retry; |
3210 | if (!replay_matches_cache(rqstp, seq, slot)) | |
3211 | goto out_put_session; | |
b85d4c01 BH |
3212 | cstate->slot = slot; |
3213 | cstate->session = session; | |
4b24ca7d | 3214 | cstate->clp = clp; |
da3846a2 | 3215 | /* Return the cached reply status and set cstate->status |
557ce264 | 3216 | * for nfsd4_proc_compound processing */ |
bf864a31 | 3217 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 3218 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 3219 | goto out; |
b85d4c01 BH |
3220 | } |
3221 | if (status) | |
66b2b9b2 | 3222 | goto out_put_session; |
b85d4c01 | 3223 | |
57266a6e | 3224 | status = nfsd4_sequence_check_conn(conn, session); |
a663bdd8 | 3225 | conn = NULL; |
57266a6e BF |
3226 | if (status) |
3227 | goto out_put_session; | |
328ead28 | 3228 | |
47ee5298 BF |
3229 | buflen = (seq->cachethis) ? |
3230 | session->se_fchannel.maxresp_cached : | |
3231 | session->se_fchannel.maxresp_sz; | |
3232 | status = (seq->cachethis) ? nfserr_rep_too_big_to_cache : | |
3233 | nfserr_rep_too_big; | |
a5cddc88 | 3234 | if (xdr_restrict_buflen(xdr, buflen - rqstp->rq_auth_slack)) |
47ee5298 | 3235 | goto out_put_session; |
32aaa62e | 3236 | svc_reserve(rqstp, buflen); |
47ee5298 BF |
3237 | |
3238 | status = nfs_ok; | |
b85d4c01 | 3239 | /* Success! bump slot seqid */ |
b85d4c01 | 3240 | slot->sl_seqid = seq->seqid; |
bf5c43c8 | 3241 | slot->sl_flags |= NFSD4_SLOT_INUSE; |
73e79482 BF |
3242 | if (seq->cachethis) |
3243 | slot->sl_flags |= NFSD4_SLOT_CACHETHIS; | |
bf5c43c8 BF |
3244 | else |
3245 | slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; | |
b85d4c01 BH |
3246 | |
3247 | cstate->slot = slot; | |
3248 | cstate->session = session; | |
4b24ca7d | 3249 | cstate->clp = clp; |
b85d4c01 | 3250 | |
b85d4c01 | 3251 | out: |
221a6876 BF |
3252 | switch (clp->cl_cb_state) { |
3253 | case NFSD4_CB_DOWN: | |
3254 | seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; | |
3255 | break; | |
3256 | case NFSD4_CB_FAULT: | |
3257 | seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; | |
3258 | break; | |
3259 | default: | |
3260 | seq->status_flags = 0; | |
aaf84eb9 | 3261 | } |
3bd64a5b BF |
3262 | if (!list_empty(&clp->cl_revoked)) |
3263 | seq->status_flags |= SEQ4_STATUS_RECALLABLE_STATE_REVOKED; | |
221a6876 | 3264 | out_no_session: |
3f42d2c4 KM |
3265 | if (conn) |
3266 | free_conn(conn); | |
c9a49628 | 3267 | spin_unlock(&nn->client_lock); |
b85d4c01 | 3268 | return status; |
66b2b9b2 | 3269 | out_put_session: |
d4e19e70 | 3270 | nfsd4_put_session_locked(session); |
221a6876 | 3271 | goto out_no_session; |
069b6ad4 AA |
3272 | } |
3273 | ||
b607664e TM |
3274 | void |
3275 | nfsd4_sequence_done(struct nfsd4_compoundres *resp) | |
3276 | { | |
3277 | struct nfsd4_compound_state *cs = &resp->cstate; | |
3278 | ||
3279 | if (nfsd4_has_session(cs)) { | |
b607664e TM |
3280 | if (cs->status != nfserr_replay_cache) { |
3281 | nfsd4_store_cache_entry(resp); | |
3282 | cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE; | |
3283 | } | |
d4e19e70 | 3284 | /* Drop session reference that was taken in nfsd4_sequence() */ |
b607664e | 3285 | nfsd4_put_session(cs->session); |
4b24ca7d JL |
3286 | } else if (cs->clp) |
3287 | put_client_renew(cs->clp); | |
b607664e TM |
3288 | } |
3289 | ||
345c2842 | 3290 | __be32 |
eb69853d CH |
3291 | nfsd4_destroy_clientid(struct svc_rqst *rqstp, |
3292 | struct nfsd4_compound_state *cstate, | |
3293 | union nfsd4_op_u *u) | |
345c2842 | 3294 | { |
eb69853d | 3295 | struct nfsd4_destroy_clientid *dc = &u->destroy_clientid; |
6b10ad19 TM |
3296 | struct nfs4_client *conf, *unconf; |
3297 | struct nfs4_client *clp = NULL; | |
57b7b43b | 3298 | __be32 status = 0; |
8daae4dc | 3299 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
345c2842 | 3300 | |
6b10ad19 | 3301 | spin_lock(&nn->client_lock); |
0a7ec377 | 3302 | unconf = find_unconfirmed_client(&dc->clientid, true, nn); |
8daae4dc | 3303 | conf = find_confirmed_client(&dc->clientid, true, nn); |
78389046 | 3304 | WARN_ON_ONCE(conf && unconf); |
345c2842 MJ |
3305 | |
3306 | if (conf) { | |
c0293b01 | 3307 | if (client_has_state(conf)) { |
345c2842 MJ |
3308 | status = nfserr_clientid_busy; |
3309 | goto out; | |
3310 | } | |
fd699b8a JL |
3311 | status = mark_client_expired_locked(conf); |
3312 | if (status) | |
3313 | goto out; | |
6b10ad19 | 3314 | clp = conf; |
345c2842 MJ |
3315 | } else if (unconf) |
3316 | clp = unconf; | |
3317 | else { | |
3318 | status = nfserr_stale_clientid; | |
3319 | goto out; | |
3320 | } | |
dedeb13f | 3321 | if (!nfsd4_mach_creds_match(clp, rqstp)) { |
6b10ad19 | 3322 | clp = NULL; |
57266a6e BF |
3323 | status = nfserr_wrong_cred; |
3324 | goto out; | |
3325 | } | |
6b10ad19 | 3326 | unhash_client_locked(clp); |
345c2842 | 3327 | out: |
6b10ad19 | 3328 | spin_unlock(&nn->client_lock); |
6b10ad19 TM |
3329 | if (clp) |
3330 | expire_client(clp); | |
345c2842 MJ |
3331 | return status; |
3332 | } | |
3333 | ||
4dc6ec00 | 3334 | __be32 |
eb69853d CH |
3335 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, |
3336 | struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) | |
4dc6ec00 | 3337 | { |
eb69853d | 3338 | struct nfsd4_reclaim_complete *rc = &u->reclaim_complete; |
57b7b43b | 3339 | __be32 status = 0; |
bcecf1cc | 3340 | |
4dc6ec00 BF |
3341 | if (rc->rca_one_fs) { |
3342 | if (!cstate->current_fh.fh_dentry) | |
3343 | return nfserr_nofilehandle; | |
3344 | /* | |
3345 | * We don't take advantage of the rca_one_fs case. | |
3346 | * That's OK, it's optional, we can safely ignore it. | |
3347 | */ | |
d28c442f | 3348 | return nfs_ok; |
4dc6ec00 | 3349 | } |
bcecf1cc | 3350 | |
bcecf1cc | 3351 | status = nfserr_complete_already; |
a52d726b JL |
3352 | if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, |
3353 | &cstate->session->se_client->cl_flags)) | |
bcecf1cc MJ |
3354 | goto out; |
3355 | ||
3356 | status = nfserr_stale_clientid; | |
3357 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
3358 | /* |
3359 | * The following error isn't really legal. | |
3360 | * But we only get here if the client just explicitly | |
3361 | * destroyed the client. Surely it no longer cares what | |
3362 | * error it gets back on an operation for the dead | |
3363 | * client. | |
3364 | */ | |
bcecf1cc MJ |
3365 | goto out; |
3366 | ||
3367 | status = nfs_ok; | |
2a4317c5 | 3368 | nfsd4_client_record_create(cstate->session->se_client); |
362063a5 | 3369 | inc_reclaim_complete(cstate->session->se_client); |
bcecf1cc | 3370 | out: |
bcecf1cc | 3371 | return status; |
4dc6ec00 BF |
3372 | } |
3373 | ||
b37ad28b | 3374 | __be32 |
b591480b | 3375 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 3376 | union nfsd4_op_u *u) |
1da177e4 | 3377 | { |
eb69853d | 3378 | struct nfsd4_setclientid *setclid = &u->setclientid; |
a084daf5 | 3379 | struct xdr_netobj clname = setclid->se_name; |
1da177e4 | 3380 | nfs4_verifier clverifier = setclid->se_verf; |
3dbacee6 TM |
3381 | struct nfs4_client *conf, *new; |
3382 | struct nfs4_client *unconf = NULL; | |
b37ad28b | 3383 | __be32 status; |
c212cecf SK |
3384 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
3385 | ||
5cc40fd7 TM |
3386 | new = create_client(clname, rqstp, &clverifier); |
3387 | if (new == NULL) | |
3388 | return nfserr_jukebox; | |
63db4632 | 3389 | /* Cases below refer to rfc 3530 section 14.2.33: */ |
3dbacee6 | 3390 | spin_lock(&nn->client_lock); |
382a62e7 | 3391 | conf = find_confirmed_client_by_name(&clname, nn); |
2b634821 | 3392 | if (conf && client_has_state(conf)) { |
63db4632 | 3393 | /* case 0: */ |
1da177e4 | 3394 | status = nfserr_clid_inuse; |
e203d506 BF |
3395 | if (clp_used_exchangeid(conf)) |
3396 | goto out; | |
026722c2 | 3397 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
3398 | char addr_str[INET6_ADDRSTRLEN]; |
3399 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
3400 | sizeof(addr_str)); | |
3401 | dprintk("NFSD: setclientid: string in use by client " | |
3402 | "at %s\n", addr_str); | |
1da177e4 LT |
3403 | goto out; |
3404 | } | |
1da177e4 | 3405 | } |
a99454aa | 3406 | unconf = find_unconfirmed_client_by_name(&clname, nn); |
8f930711 | 3407 | if (unconf) |
3dbacee6 | 3408 | unhash_client_locked(unconf); |
41eb1670 | 3409 | if (conf && same_verf(&conf->cl_verifier, &clverifier)) { |
63db4632 | 3410 | /* case 1: probable callback update */ |
1da177e4 | 3411 | copy_clid(new, conf); |
41eb1670 KM |
3412 | gen_confirm(new, nn); |
3413 | } else /* case 4 (new client) or cases 2, 3 (client reboot): */ | |
c212cecf | 3414 | gen_clid(new, nn); |
8323c3b2 | 3415 | new->cl_minorversion = 0; |
6f3d772f | 3416 | gen_callback(new, setclid, rqstp); |
ac55fdc4 | 3417 | add_to_unconfirmed(new); |
1da177e4 LT |
3418 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
3419 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
3420 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
5cc40fd7 | 3421 | new = NULL; |
1da177e4 LT |
3422 | status = nfs_ok; |
3423 | out: | |
3dbacee6 | 3424 | spin_unlock(&nn->client_lock); |
5cc40fd7 TM |
3425 | if (new) |
3426 | free_client(new); | |
3dbacee6 TM |
3427 | if (unconf) |
3428 | expire_client(unconf); | |
1da177e4 LT |
3429 | return status; |
3430 | } | |
3431 | ||
3432 | ||
b37ad28b | 3433 | __be32 |
b591480b | 3434 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
eb69853d CH |
3435 | struct nfsd4_compound_state *cstate, |
3436 | union nfsd4_op_u *u) | |
1da177e4 | 3437 | { |
eb69853d CH |
3438 | struct nfsd4_setclientid_confirm *setclientid_confirm = |
3439 | &u->setclientid_confirm; | |
21ab45a4 | 3440 | struct nfs4_client *conf, *unconf; |
d20c11d8 | 3441 | struct nfs4_client *old = NULL; |
1da177e4 LT |
3442 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
3443 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 3444 | __be32 status; |
7f2210fa | 3445 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 3446 | |
2c142baa | 3447 | if (STALE_CLIENTID(clid, nn)) |
1da177e4 | 3448 | return nfserr_stale_clientid; |
21ab45a4 | 3449 | |
d20c11d8 | 3450 | spin_lock(&nn->client_lock); |
8daae4dc | 3451 | conf = find_confirmed_client(clid, false, nn); |
0a7ec377 | 3452 | unconf = find_unconfirmed_client(clid, false, nn); |
a186e767 | 3453 | /* |
8695b90a BF |
3454 | * We try hard to give out unique clientid's, so if we get an |
3455 | * attempt to confirm the same clientid with a different cred, | |
f984a7ce BF |
3456 | * the client may be buggy; this should never happen. |
3457 | * | |
3458 | * Nevertheless, RFC 7530 recommends INUSE for this case: | |
a186e767 | 3459 | */ |
f984a7ce | 3460 | status = nfserr_clid_inuse; |
8695b90a BF |
3461 | if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) |
3462 | goto out; | |
3463 | if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) | |
3464 | goto out; | |
63db4632 | 3465 | /* cases below refer to rfc 3530 section 14.2.34: */ |
90d700b7 | 3466 | if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) { |
7d22fc11 BF |
3467 | if (conf && same_verf(&confirm, &conf->cl_confirm)) { |
3468 | /* case 2: probable retransmit */ | |
1da177e4 | 3469 | status = nfs_ok; |
7d22fc11 | 3470 | } else /* case 4: client hasn't noticed we rebooted yet? */ |
90d700b7 BF |
3471 | status = nfserr_stale_clientid; |
3472 | goto out; | |
3473 | } | |
3474 | status = nfs_ok; | |
3475 | if (conf) { /* case 1: callback update */ | |
d20c11d8 JL |
3476 | old = unconf; |
3477 | unhash_client_locked(old); | |
8695b90a | 3478 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
90d700b7 | 3479 | } else { /* case 3: normal case; new or rebooted client */ |
d20c11d8 JL |
3480 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
3481 | if (old) { | |
2b634821 BF |
3482 | status = nfserr_clid_inuse; |
3483 | if (client_has_state(old) | |
3484 | && !same_creds(&unconf->cl_cred, | |
3485 | &old->cl_cred)) | |
3486 | goto out; | |
d20c11d8 | 3487 | status = mark_client_expired_locked(old); |
7abea1e8 JL |
3488 | if (status) { |
3489 | old = NULL; | |
221a6876 | 3490 | goto out; |
7abea1e8 | 3491 | } |
221a6876 | 3492 | } |
8695b90a | 3493 | move_to_confirmed(unconf); |
d20c11d8 | 3494 | conf = unconf; |
08e8987c | 3495 | } |
d20c11d8 JL |
3496 | get_client_locked(conf); |
3497 | spin_unlock(&nn->client_lock); | |
3498 | nfsd4_probe_callback(conf); | |
3499 | spin_lock(&nn->client_lock); | |
3500 | put_client_renew_locked(conf); | |
1da177e4 | 3501 | out: |
d20c11d8 JL |
3502 | spin_unlock(&nn->client_lock); |
3503 | if (old) | |
3504 | expire_client(old); | |
1da177e4 LT |
3505 | return status; |
3506 | } | |
3507 | ||
32513b40 BF |
3508 | static struct nfs4_file *nfsd4_alloc_file(void) |
3509 | { | |
3510 | return kmem_cache_alloc(file_slab, GFP_KERNEL); | |
3511 | } | |
3512 | ||
1da177e4 | 3513 | /* OPEN Share state helper functions */ |
5b095e99 JL |
3514 | static void nfsd4_init_file(struct knfsd_fh *fh, unsigned int hashval, |
3515 | struct nfs4_file *fp) | |
1da177e4 | 3516 | { |
950e0118 TM |
3517 | lockdep_assert_held(&state_lock); |
3518 | ||
818a34eb | 3519 | refcount_set(&fp->fi_ref, 1); |
1d31a253 | 3520 | spin_lock_init(&fp->fi_lock); |
32513b40 BF |
3521 | INIT_LIST_HEAD(&fp->fi_stateids); |
3522 | INIT_LIST_HEAD(&fp->fi_delegations); | |
8287f009 | 3523 | INIT_LIST_HEAD(&fp->fi_clnt_odstate); |
e2cf80d7 | 3524 | fh_copy_shallow(&fp->fi_fhandle, fh); |
0c637be8 | 3525 | fp->fi_deleg_file = NULL; |
32513b40 | 3526 | fp->fi_had_conflict = false; |
baeb4ff0 | 3527 | fp->fi_share_deny = 0; |
32513b40 BF |
3528 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); |
3529 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
9cf514cc CH |
3530 | #ifdef CONFIG_NFSD_PNFS |
3531 | INIT_LIST_HEAD(&fp->fi_lo_states); | |
c5c707f9 | 3532 | atomic_set(&fp->fi_lo_recalls, 0); |
9cf514cc | 3533 | #endif |
5b095e99 | 3534 | hlist_add_head_rcu(&fp->fi_hash, &file_hashtbl[hashval]); |
1da177e4 LT |
3535 | } |
3536 | ||
e8ff2a84 | 3537 | void |
1da177e4 LT |
3538 | nfsd4_free_slabs(void) |
3539 | { | |
9258a2d5 | 3540 | kmem_cache_destroy(client_slab); |
abf1135b CH |
3541 | kmem_cache_destroy(openowner_slab); |
3542 | kmem_cache_destroy(lockowner_slab); | |
3543 | kmem_cache_destroy(file_slab); | |
3544 | kmem_cache_destroy(stateid_slab); | |
3545 | kmem_cache_destroy(deleg_slab); | |
9258a2d5 | 3546 | kmem_cache_destroy(odstate_slab); |
e60d4398 | 3547 | } |
1da177e4 | 3548 | |
72083396 | 3549 | int |
e60d4398 N |
3550 | nfsd4_init_slabs(void) |
3551 | { | |
9258a2d5 JL |
3552 | client_slab = kmem_cache_create("nfsd4_clients", |
3553 | sizeof(struct nfs4_client), 0, 0, NULL); | |
3554 | if (client_slab == NULL) | |
3555 | goto out; | |
fe0750e5 BF |
3556 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
3557 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
3558 | if (openowner_slab == NULL) | |
9258a2d5 | 3559 | goto out_free_client_slab; |
fe0750e5 | 3560 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", |
3c40794b | 3561 | sizeof(struct nfs4_lockowner), 0, 0, NULL); |
fe0750e5 | 3562 | if (lockowner_slab == NULL) |
abf1135b | 3563 | goto out_free_openowner_slab; |
e60d4398 | 3564 | file_slab = kmem_cache_create("nfsd4_files", |
20c2df83 | 3565 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 | 3566 | if (file_slab == NULL) |
abf1135b | 3567 | goto out_free_lockowner_slab; |
5ac049ac | 3568 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
dcef0413 | 3569 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
5ac049ac | 3570 | if (stateid_slab == NULL) |
abf1135b | 3571 | goto out_free_file_slab; |
5b2d21c1 | 3572 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 3573 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 | 3574 | if (deleg_slab == NULL) |
abf1135b | 3575 | goto out_free_stateid_slab; |
8287f009 SB |
3576 | odstate_slab = kmem_cache_create("nfsd4_odstate", |
3577 | sizeof(struct nfs4_clnt_odstate), 0, 0, NULL); | |
3578 | if (odstate_slab == NULL) | |
3579 | goto out_free_deleg_slab; | |
e60d4398 | 3580 | return 0; |
abf1135b | 3581 | |
8287f009 SB |
3582 | out_free_deleg_slab: |
3583 | kmem_cache_destroy(deleg_slab); | |
abf1135b CH |
3584 | out_free_stateid_slab: |
3585 | kmem_cache_destroy(stateid_slab); | |
3586 | out_free_file_slab: | |
3587 | kmem_cache_destroy(file_slab); | |
3588 | out_free_lockowner_slab: | |
3589 | kmem_cache_destroy(lockowner_slab); | |
3590 | out_free_openowner_slab: | |
3591 | kmem_cache_destroy(openowner_slab); | |
9258a2d5 JL |
3592 | out_free_client_slab: |
3593 | kmem_cache_destroy(client_slab); | |
abf1135b | 3594 | out: |
e60d4398 N |
3595 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); |
3596 | return -ENOMEM; | |
1da177e4 LT |
3597 | } |
3598 | ||
ff194bd9 | 3599 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 3600 | { |
ff194bd9 BF |
3601 | rp->rp_status = nfserr_serverfault; |
3602 | rp->rp_buflen = 0; | |
3603 | rp->rp_buf = rp->rp_ibuf; | |
58fb12e6 JL |
3604 | mutex_init(&rp->rp_mutex); |
3605 | } | |
3606 | ||
3607 | static void nfsd4_cstate_assign_replay(struct nfsd4_compound_state *cstate, | |
3608 | struct nfs4_stateowner *so) | |
3609 | { | |
3610 | if (!nfsd4_has_session(cstate)) { | |
3611 | mutex_lock(&so->so_replay.rp_mutex); | |
b5971afa | 3612 | cstate->replay_owner = nfs4_get_stateowner(so); |
58fb12e6 JL |
3613 | } |
3614 | } | |
3615 | ||
3616 | void nfsd4_cstate_clear_replay(struct nfsd4_compound_state *cstate) | |
3617 | { | |
3618 | struct nfs4_stateowner *so = cstate->replay_owner; | |
3619 | ||
3620 | if (so != NULL) { | |
3621 | cstate->replay_owner = NULL; | |
3622 | mutex_unlock(&so->so_replay.rp_mutex); | |
3623 | nfs4_put_stateowner(so); | |
3624 | } | |
1da177e4 LT |
3625 | } |
3626 | ||
fe0750e5 | 3627 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 3628 | { |
1da177e4 | 3629 | struct nfs4_stateowner *sop; |
1da177e4 | 3630 | |
fe0750e5 | 3631 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
3632 | if (!sop) |
3633 | return NULL; | |
3634 | ||
3635 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); | |
3636 | if (!sop->so_owner.data) { | |
fe0750e5 | 3637 | kmem_cache_free(slab, sop); |
1da177e4 | 3638 | return NULL; |
ff194bd9 BF |
3639 | } |
3640 | sop->so_owner.len = owner->len; | |
3641 | ||
ea1da636 | 3642 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 BF |
3643 | sop->so_client = clp; |
3644 | init_nfs4_replay(&sop->so_replay); | |
6b180f0b | 3645 | atomic_set(&sop->so_count, 1); |
ff194bd9 BF |
3646 | return sop; |
3647 | } | |
3648 | ||
fe0750e5 | 3649 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 | 3650 | { |
d4f0489f | 3651 | lockdep_assert_held(&clp->cl_lock); |
9b531137 | 3652 | |
d4f0489f TM |
3653 | list_add(&oo->oo_owner.so_strhash, |
3654 | &clp->cl_ownerstr_hashtbl[strhashval]); | |
fe0750e5 | 3655 | list_add(&oo->oo_perclient, &clp->cl_openowners); |
ff194bd9 BF |
3656 | } |
3657 | ||
8f4b54c5 JL |
3658 | static void nfs4_unhash_openowner(struct nfs4_stateowner *so) |
3659 | { | |
d4f0489f | 3660 | unhash_openowner_locked(openowner(so)); |
8f4b54c5 JL |
3661 | } |
3662 | ||
6b180f0b JL |
3663 | static void nfs4_free_openowner(struct nfs4_stateowner *so) |
3664 | { | |
3665 | struct nfs4_openowner *oo = openowner(so); | |
3666 | ||
3667 | kmem_cache_free(openowner_slab, oo); | |
3668 | } | |
3669 | ||
3670 | static const struct nfs4_stateowner_operations openowner_ops = { | |
8f4b54c5 JL |
3671 | .so_unhash = nfs4_unhash_openowner, |
3672 | .so_free = nfs4_free_openowner, | |
6b180f0b JL |
3673 | }; |
3674 | ||
7fc0564e AE |
3675 | static struct nfs4_ol_stateid * |
3676 | nfsd4_find_existing_open(struct nfs4_file *fp, struct nfsd4_open *open) | |
3677 | { | |
3678 | struct nfs4_ol_stateid *local, *ret = NULL; | |
3679 | struct nfs4_openowner *oo = open->op_openowner; | |
3680 | ||
3681 | lockdep_assert_held(&fp->fi_lock); | |
3682 | ||
3683 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { | |
3684 | /* ignore lock owners */ | |
3685 | if (local->st_stateowner->so_is_open_owner == 0) | |
3686 | continue; | |
15ca08d3 TM |
3687 | if (local->st_stateowner != &oo->oo_owner) |
3688 | continue; | |
3689 | if (local->st_stid.sc_type == NFS4_OPEN_STID) { | |
7fc0564e | 3690 | ret = local; |
a15dfcd5 | 3691 | refcount_inc(&ret->st_stid.sc_count); |
7fc0564e AE |
3692 | break; |
3693 | } | |
3694 | } | |
3695 | return ret; | |
3696 | } | |
3697 | ||
15ca08d3 TM |
3698 | static __be32 |
3699 | nfsd4_verify_open_stid(struct nfs4_stid *s) | |
3700 | { | |
3701 | __be32 ret = nfs_ok; | |
3702 | ||
3703 | switch (s->sc_type) { | |
3704 | default: | |
3705 | break; | |
4f176417 | 3706 | case 0: |
15ca08d3 TM |
3707 | case NFS4_CLOSED_STID: |
3708 | case NFS4_CLOSED_DELEG_STID: | |
3709 | ret = nfserr_bad_stateid; | |
3710 | break; | |
3711 | case NFS4_REVOKED_DELEG_STID: | |
3712 | ret = nfserr_deleg_revoked; | |
3713 | } | |
3714 | return ret; | |
3715 | } | |
3716 | ||
3717 | /* Lock the stateid st_mutex, and deal with races with CLOSE */ | |
3718 | static __be32 | |
3719 | nfsd4_lock_ol_stateid(struct nfs4_ol_stateid *stp) | |
3720 | { | |
3721 | __be32 ret; | |
3722 | ||
4f34bd05 | 3723 | mutex_lock_nested(&stp->st_mutex, LOCK_STATEID_MUTEX); |
15ca08d3 TM |
3724 | ret = nfsd4_verify_open_stid(&stp->st_stid); |
3725 | if (ret != nfs_ok) | |
3726 | mutex_unlock(&stp->st_mutex); | |
3727 | return ret; | |
3728 | } | |
3729 | ||
3730 | static struct nfs4_ol_stateid * | |
3731 | nfsd4_find_and_lock_existing_open(struct nfs4_file *fp, struct nfsd4_open *open) | |
3732 | { | |
3733 | struct nfs4_ol_stateid *stp; | |
3734 | for (;;) { | |
3735 | spin_lock(&fp->fi_lock); | |
3736 | stp = nfsd4_find_existing_open(fp, open); | |
3737 | spin_unlock(&fp->fi_lock); | |
3738 | if (!stp || nfsd4_lock_ol_stateid(stp) == nfs_ok) | |
3739 | break; | |
3740 | nfs4_put_stid(&stp->st_stid); | |
3741 | } | |
3742 | return stp; | |
3743 | } | |
3744 | ||
fe0750e5 | 3745 | static struct nfs4_openowner * |
13d6f66b | 3746 | alloc_init_open_stateowner(unsigned int strhashval, struct nfsd4_open *open, |
db24b3b4 JL |
3747 | struct nfsd4_compound_state *cstate) |
3748 | { | |
13d6f66b | 3749 | struct nfs4_client *clp = cstate->clp; |
7ffb5880 | 3750 | struct nfs4_openowner *oo, *ret; |
ff194bd9 | 3751 | |
fe0750e5 BF |
3752 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
3753 | if (!oo) | |
ff194bd9 | 3754 | return NULL; |
6b180f0b | 3755 | oo->oo_owner.so_ops = &openowner_ops; |
fe0750e5 BF |
3756 | oo->oo_owner.so_is_open_owner = 1; |
3757 | oo->oo_owner.so_seqid = open->op_seqid; | |
d3134b10 | 3758 | oo->oo_flags = 0; |
db24b3b4 JL |
3759 | if (nfsd4_has_session(cstate)) |
3760 | oo->oo_flags |= NFS4_OO_CONFIRMED; | |
fe0750e5 | 3761 | oo->oo_time = 0; |
38c387b5 | 3762 | oo->oo_last_closed_stid = NULL; |
fe0750e5 | 3763 | INIT_LIST_HEAD(&oo->oo_close_lru); |
d4f0489f TM |
3764 | spin_lock(&clp->cl_lock); |
3765 | ret = find_openstateowner_str_locked(strhashval, open, clp); | |
7ffb5880 TM |
3766 | if (ret == NULL) { |
3767 | hash_openowner(oo, clp, strhashval); | |
3768 | ret = oo; | |
3769 | } else | |
d50ffded KM |
3770 | nfs4_free_stateowner(&oo->oo_owner); |
3771 | ||
d4f0489f | 3772 | spin_unlock(&clp->cl_lock); |
c5952338 | 3773 | return ret; |
1da177e4 LT |
3774 | } |
3775 | ||
7fc0564e | 3776 | static struct nfs4_ol_stateid * |
8c7245ab | 3777 | init_open_stateid(struct nfs4_file *fp, struct nfsd4_open *open) |
7fc0564e AE |
3778 | { |
3779 | ||
fe0750e5 | 3780 | struct nfs4_openowner *oo = open->op_openowner; |
7fc0564e | 3781 | struct nfs4_ol_stateid *retstp = NULL; |
8c7245ab | 3782 | struct nfs4_ol_stateid *stp; |
1da177e4 | 3783 | |
8c7245ab | 3784 | stp = open->op_stp; |
5cc1fb2a OD |
3785 | /* We are moving these outside of the spinlocks to avoid the warnings */ |
3786 | mutex_init(&stp->st_mutex); | |
4f34bd05 | 3787 | mutex_lock_nested(&stp->st_mutex, OPEN_STATEID_MUTEX); |
5cc1fb2a | 3788 | |
15ca08d3 | 3789 | retry: |
7fc0564e AE |
3790 | spin_lock(&oo->oo_owner.so_client->cl_lock); |
3791 | spin_lock(&fp->fi_lock); | |
3792 | ||
3793 | retstp = nfsd4_find_existing_open(fp, open); | |
3794 | if (retstp) | |
3795 | goto out_unlock; | |
8c7245ab OD |
3796 | |
3797 | open->op_stp = NULL; | |
a15dfcd5 | 3798 | refcount_inc(&stp->st_stid.sc_count); |
3abdb607 | 3799 | stp->st_stid.sc_type = NFS4_OPEN_STID; |
3c87b9b7 | 3800 | INIT_LIST_HEAD(&stp->st_locks); |
b5971afa | 3801 | stp->st_stateowner = nfs4_get_stateowner(&oo->oo_owner); |
13cd2184 | 3802 | get_nfs4_file(fp); |
11b9164a | 3803 | stp->st_stid.sc_file = fp; |
1da177e4 LT |
3804 | stp->st_access_bmap = 0; |
3805 | stp->st_deny_bmap = 0; | |
4c4cd222 | 3806 | stp->st_openstp = NULL; |
1c755dc1 | 3807 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); |
1d31a253 | 3808 | list_add(&stp->st_perfile, &fp->fi_stateids); |
7fc0564e AE |
3809 | |
3810 | out_unlock: | |
1d31a253 | 3811 | spin_unlock(&fp->fi_lock); |
1c755dc1 | 3812 | spin_unlock(&oo->oo_owner.so_client->cl_lock); |
5cc1fb2a | 3813 | if (retstp) { |
15ca08d3 TM |
3814 | /* Handle races with CLOSE */ |
3815 | if (nfsd4_lock_ol_stateid(retstp) != nfs_ok) { | |
3816 | nfs4_put_stid(&retstp->st_stid); | |
3817 | goto retry; | |
3818 | } | |
8c7245ab | 3819 | /* To keep mutex tracking happy */ |
5cc1fb2a | 3820 | mutex_unlock(&stp->st_mutex); |
8c7245ab | 3821 | stp = retstp; |
5cc1fb2a | 3822 | } |
8c7245ab | 3823 | return stp; |
1da177e4 LT |
3824 | } |
3825 | ||
d3134b10 JL |
3826 | /* |
3827 | * In the 4.0 case we need to keep the owners around a little while to handle | |
3828 | * CLOSE replay. We still do need to release any file access that is held by | |
3829 | * them before returning however. | |
3830 | */ | |
fd39ca9a | 3831 | static void |
d3134b10 | 3832 | move_to_close_lru(struct nfs4_ol_stateid *s, struct net *net) |
1da177e4 | 3833 | { |
217526e7 | 3834 | struct nfs4_ol_stateid *last; |
d3134b10 JL |
3835 | struct nfs4_openowner *oo = openowner(s->st_stateowner); |
3836 | struct nfsd_net *nn = net_generic(s->st_stid.sc_client->net, | |
3837 | nfsd_net_id); | |
73758fed | 3838 | |
fe0750e5 | 3839 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 3840 | |
b401be22 JL |
3841 | /* |
3842 | * We know that we hold one reference via nfsd4_close, and another | |
3843 | * "persistent" reference for the client. If the refcount is higher | |
3844 | * than 2, then there are still calls in progress that are using this | |
3845 | * stateid. We can't put the sc_file reference until they are finished. | |
3846 | * Wait for the refcount to drop to 2. Since it has been unhashed, | |
3847 | * there should be no danger of the refcount going back up again at | |
3848 | * this point. | |
3849 | */ | |
a15dfcd5 | 3850 | wait_event(close_wq, refcount_read(&s->st_stid.sc_count) == 2); |
b401be22 | 3851 | |
d3134b10 JL |
3852 | release_all_access(s); |
3853 | if (s->st_stid.sc_file) { | |
3854 | put_nfs4_file(s->st_stid.sc_file); | |
3855 | s->st_stid.sc_file = NULL; | |
3856 | } | |
217526e7 JL |
3857 | |
3858 | spin_lock(&nn->client_lock); | |
3859 | last = oo->oo_last_closed_stid; | |
d3134b10 | 3860 | oo->oo_last_closed_stid = s; |
73758fed | 3861 | list_move_tail(&oo->oo_close_lru, &nn->close_lru); |
fe0750e5 | 3862 | oo->oo_time = get_seconds(); |
217526e7 JL |
3863 | spin_unlock(&nn->client_lock); |
3864 | if (last) | |
3865 | nfs4_put_stid(&last->st_stid); | |
1da177e4 LT |
3866 | } |
3867 | ||
1da177e4 LT |
3868 | /* search file_hashtbl[] for file */ |
3869 | static struct nfs4_file * | |
5b095e99 | 3870 | find_file_locked(struct knfsd_fh *fh, unsigned int hashval) |
1da177e4 | 3871 | { |
1da177e4 LT |
3872 | struct nfs4_file *fp; |
3873 | ||
5b095e99 | 3874 | hlist_for_each_entry_rcu(fp, &file_hashtbl[hashval], fi_hash) { |
4d94c2ef | 3875 | if (fh_match(&fp->fi_fhandle, fh)) { |
818a34eb | 3876 | if (refcount_inc_not_zero(&fp->fi_ref)) |
5b095e99 | 3877 | return fp; |
13cd2184 | 3878 | } |
1da177e4 LT |
3879 | } |
3880 | return NULL; | |
3881 | } | |
3882 | ||
e6ba76e1 | 3883 | struct nfs4_file * |
ca943217 | 3884 | find_file(struct knfsd_fh *fh) |
950e0118 TM |
3885 | { |
3886 | struct nfs4_file *fp; | |
5b095e99 | 3887 | unsigned int hashval = file_hashval(fh); |
950e0118 | 3888 | |
5b095e99 JL |
3889 | rcu_read_lock(); |
3890 | fp = find_file_locked(fh, hashval); | |
3891 | rcu_read_unlock(); | |
950e0118 TM |
3892 | return fp; |
3893 | } | |
3894 | ||
3895 | static struct nfs4_file * | |
f9c00c3a | 3896 | find_or_add_file(struct nfs4_file *new, struct knfsd_fh *fh) |
950e0118 TM |
3897 | { |
3898 | struct nfs4_file *fp; | |
5b095e99 JL |
3899 | unsigned int hashval = file_hashval(fh); |
3900 | ||
3901 | rcu_read_lock(); | |
3902 | fp = find_file_locked(fh, hashval); | |
3903 | rcu_read_unlock(); | |
3904 | if (fp) | |
3905 | return fp; | |
950e0118 TM |
3906 | |
3907 | spin_lock(&state_lock); | |
5b095e99 JL |
3908 | fp = find_file_locked(fh, hashval); |
3909 | if (likely(fp == NULL)) { | |
3910 | nfsd4_init_file(fh, hashval, new); | |
950e0118 TM |
3911 | fp = new; |
3912 | } | |
3913 | spin_unlock(&state_lock); | |
3914 | ||
3915 | return fp; | |
3916 | } | |
3917 | ||
1da177e4 LT |
3918 | /* |
3919 | * Called to check deny when READ with all zero stateid or | |
3920 | * WRITE with all zero or all one stateid | |
3921 | */ | |
b37ad28b | 3922 | static __be32 |
1da177e4 LT |
3923 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
3924 | { | |
1da177e4 | 3925 | struct nfs4_file *fp; |
baeb4ff0 | 3926 | __be32 ret = nfs_ok; |
1da177e4 | 3927 | |
ca943217 | 3928 | fp = find_file(¤t_fh->fh_handle); |
13cd2184 | 3929 | if (!fp) |
baeb4ff0 JL |
3930 | return ret; |
3931 | /* Check for conflicting share reservations */ | |
1d31a253 | 3932 | spin_lock(&fp->fi_lock); |
baeb4ff0 JL |
3933 | if (fp->fi_share_deny & deny_type) |
3934 | ret = nfserr_locked; | |
1d31a253 | 3935 | spin_unlock(&fp->fi_lock); |
13cd2184 N |
3936 | put_nfs4_file(fp); |
3937 | return ret; | |
1da177e4 LT |
3938 | } |
3939 | ||
0162ac2b | 3940 | static void nfsd4_cb_recall_prepare(struct nfsd4_callback *cb) |
1da177e4 | 3941 | { |
0162ac2b | 3942 | struct nfs4_delegation *dp = cb_to_delegation(cb); |
11b9164a TM |
3943 | struct nfsd_net *nn = net_generic(dp->dl_stid.sc_client->net, |
3944 | nfsd_net_id); | |
e8c69d17 | 3945 | |
11b9164a | 3946 | block_delegations(&dp->dl_stid.sc_file->fi_fhandle); |
f54fe962 | 3947 | |
dff1399f | 3948 | /* |
f54fe962 JL |
3949 | * We can't do this in nfsd_break_deleg_cb because it is |
3950 | * already holding inode->i_lock. | |
3951 | * | |
dff1399f JL |
3952 | * If the dl_time != 0, then we know that it has already been |
3953 | * queued for a lease break. Don't queue it again. | |
3954 | */ | |
f54fe962 | 3955 | spin_lock(&state_lock); |
dff1399f | 3956 | if (dp->dl_time == 0) { |
dff1399f | 3957 | dp->dl_time = get_seconds(); |
02e1215f | 3958 | list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru); |
dff1399f | 3959 | } |
02e1215f JL |
3960 | spin_unlock(&state_lock); |
3961 | } | |
1da177e4 | 3962 | |
0162ac2b CH |
3963 | static int nfsd4_cb_recall_done(struct nfsd4_callback *cb, |
3964 | struct rpc_task *task) | |
3965 | { | |
3966 | struct nfs4_delegation *dp = cb_to_delegation(cb); | |
3967 | ||
a457974f AE |
3968 | if (dp->dl_stid.sc_type == NFS4_CLOSED_DELEG_STID) |
3969 | return 1; | |
3970 | ||
0162ac2b CH |
3971 | switch (task->tk_status) { |
3972 | case 0: | |
3973 | return 1; | |
1c73b9d2 SM |
3974 | case -NFS4ERR_DELAY: |
3975 | rpc_delay(task, 2 * HZ); | |
3976 | return 0; | |
0162ac2b CH |
3977 | case -EBADHANDLE: |
3978 | case -NFS4ERR_BAD_STATEID: | |
3979 | /* | |
3980 | * Race: client probably got cb_recall before open reply | |
3981 | * granting delegation. | |
3982 | */ | |
3983 | if (dp->dl_retries--) { | |
3984 | rpc_delay(task, 2 * HZ); | |
3985 | return 0; | |
3986 | } | |
3987 | /*FALLTHRU*/ | |
3988 | default: | |
1c73b9d2 | 3989 | return 1; |
0162ac2b CH |
3990 | } |
3991 | } | |
3992 | ||
3993 | static void nfsd4_cb_recall_release(struct nfsd4_callback *cb) | |
3994 | { | |
3995 | struct nfs4_delegation *dp = cb_to_delegation(cb); | |
3996 | ||
3997 | nfs4_put_stid(&dp->dl_stid); | |
3998 | } | |
3999 | ||
c4cb8974 | 4000 | static const struct nfsd4_callback_ops nfsd4_cb_recall_ops = { |
0162ac2b CH |
4001 | .prepare = nfsd4_cb_recall_prepare, |
4002 | .done = nfsd4_cb_recall_done, | |
4003 | .release = nfsd4_cb_recall_release, | |
4004 | }; | |
4005 | ||
02e1215f JL |
4006 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
4007 | { | |
4008 | /* | |
4009 | * We're assuming the state code never drops its reference | |
4010 | * without first removing the lease. Since we're in this lease | |
4a269efb BF |
4011 | * callback (and since the lease code is serialized by the |
4012 | * i_lock) we know the server hasn't removed the lease yet, and | |
4013 | * we know it's safe to take a reference. | |
02e1215f | 4014 | */ |
a15dfcd5 | 4015 | refcount_inc(&dp->dl_stid.sc_count); |
f0b5de1b | 4016 | nfsd4_run_cb(&dp->dl_recall); |
6b57d9c8 BF |
4017 | } |
4018 | ||
1c8c601a | 4019 | /* Called from break_lease() with i_lock held. */ |
4d01b7f5 JL |
4020 | static bool |
4021 | nfsd_break_deleg_cb(struct file_lock *fl) | |
6b57d9c8 | 4022 | { |
4d01b7f5 | 4023 | bool ret = false; |
653e514e BF |
4024 | struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; |
4025 | struct nfs4_file *fp = dp->dl_stid.sc_file; | |
6b57d9c8 | 4026 | |
0272e1fd BF |
4027 | /* |
4028 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 4029 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 4030 | * in time: |
0272e1fd BF |
4031 | */ |
4032 | fl->fl_break_time = 0; | |
1da177e4 | 4033 | |
02e1215f | 4034 | spin_lock(&fp->fi_lock); |
417c6629 | 4035 | fp->fi_had_conflict = true; |
353601e7 | 4036 | nfsd_break_one_deleg(dp); |
02e1215f | 4037 | spin_unlock(&fp->fi_lock); |
4d01b7f5 | 4038 | return ret; |
1da177e4 LT |
4039 | } |
4040 | ||
c45198ed | 4041 | static int |
7448cc37 JL |
4042 | nfsd_change_deleg_cb(struct file_lock *onlist, int arg, |
4043 | struct list_head *dispose) | |
1da177e4 LT |
4044 | { |
4045 | if (arg & F_UNLCK) | |
c45198ed | 4046 | return lease_modify(onlist, arg, dispose); |
1da177e4 LT |
4047 | else |
4048 | return -EAGAIN; | |
4049 | } | |
4050 | ||
7b021967 | 4051 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
4052 | .lm_break = nfsd_break_deleg_cb, |
4053 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
4054 | }; |
4055 | ||
7a8711c9 BF |
4056 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
4057 | { | |
4058 | if (nfsd4_has_session(cstate)) | |
4059 | return nfs_ok; | |
4060 | if (seqid == so->so_seqid - 1) | |
4061 | return nfserr_replay_me; | |
4062 | if (seqid == so->so_seqid) | |
4063 | return nfs_ok; | |
4064 | return nfserr_bad_seqid; | |
4065 | } | |
1da177e4 | 4066 | |
4b24ca7d JL |
4067 | static __be32 lookup_clientid(clientid_t *clid, |
4068 | struct nfsd4_compound_state *cstate, | |
4069 | struct nfsd_net *nn) | |
4070 | { | |
4071 | struct nfs4_client *found; | |
4072 | ||
4073 | if (cstate->clp) { | |
4074 | found = cstate->clp; | |
4075 | if (!same_clid(&found->cl_clientid, clid)) | |
4076 | return nfserr_stale_clientid; | |
4077 | return nfs_ok; | |
4078 | } | |
4079 | ||
4080 | if (STALE_CLIENTID(clid, nn)) | |
4081 | return nfserr_stale_clientid; | |
4082 | ||
4083 | /* | |
4084 | * For v4.1+ we get the client in the SEQUENCE op. If we don't have one | |
4085 | * cached already then we know this is for is for v4.0 and "sessions" | |
4086 | * will be false. | |
4087 | */ | |
4088 | WARN_ON_ONCE(cstate->session); | |
3e339f96 | 4089 | spin_lock(&nn->client_lock); |
4b24ca7d | 4090 | found = find_confirmed_client(clid, false, nn); |
3e339f96 TM |
4091 | if (!found) { |
4092 | spin_unlock(&nn->client_lock); | |
4b24ca7d | 4093 | return nfserr_expired; |
3e339f96 TM |
4094 | } |
4095 | atomic_inc(&found->cl_refcount); | |
4096 | spin_unlock(&nn->client_lock); | |
4b24ca7d JL |
4097 | |
4098 | /* Cache the nfs4_client in cstate! */ | |
4099 | cstate->clp = found; | |
4b24ca7d JL |
4100 | return nfs_ok; |
4101 | } | |
4102 | ||
b37ad28b | 4103 | __be32 |
6668958f | 4104 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
3320fef1 | 4105 | struct nfsd4_open *open, struct nfsd_net *nn) |
1da177e4 | 4106 | { |
1da177e4 LT |
4107 | clientid_t *clientid = &open->op_clientid; |
4108 | struct nfs4_client *clp = NULL; | |
4109 | unsigned int strhashval; | |
fe0750e5 | 4110 | struct nfs4_openowner *oo = NULL; |
4cdc951b | 4111 | __be32 status; |
1da177e4 | 4112 | |
2c142baa | 4113 | if (STALE_CLIENTID(&open->op_clientid, nn)) |
1da177e4 | 4114 | return nfserr_stale_clientid; |
32513b40 BF |
4115 | /* |
4116 | * In case we need it later, after we've already created the | |
4117 | * file and don't want to risk a further failure: | |
4118 | */ | |
4119 | open->op_file = nfsd4_alloc_file(); | |
4120 | if (open->op_file == NULL) | |
4121 | return nfserr_jukebox; | |
1da177e4 | 4122 | |
2d91e895 TM |
4123 | status = lookup_clientid(clientid, cstate, nn); |
4124 | if (status) | |
4125 | return status; | |
4126 | clp = cstate->clp; | |
4127 | ||
d4f0489f TM |
4128 | strhashval = ownerstr_hashval(&open->op_owner); |
4129 | oo = find_openstateowner_str(strhashval, open, clp); | |
fe0750e5 BF |
4130 | open->op_openowner = oo; |
4131 | if (!oo) { | |
bcf130f9 | 4132 | goto new_owner; |
1da177e4 | 4133 | } |
dad1c067 | 4134 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
0f442aa2 | 4135 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
4136 | release_openowner(oo); |
4137 | open->op_openowner = NULL; | |
bcf130f9 | 4138 | goto new_owner; |
0f442aa2 | 4139 | } |
4cdc951b BF |
4140 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
4141 | if (status) | |
4142 | return status; | |
4cdc951b | 4143 | goto alloc_stateid; |
bcf130f9 | 4144 | new_owner: |
13d6f66b | 4145 | oo = alloc_init_open_stateowner(strhashval, open, cstate); |
bcf130f9 BF |
4146 | if (oo == NULL) |
4147 | return nfserr_jukebox; | |
4148 | open->op_openowner = oo; | |
4cdc951b | 4149 | alloc_stateid: |
b49e084d | 4150 | open->op_stp = nfs4_alloc_open_stateid(clp); |
4cdc951b BF |
4151 | if (!open->op_stp) |
4152 | return nfserr_jukebox; | |
8287f009 SB |
4153 | |
4154 | if (nfsd4_has_session(cstate) && | |
4155 | (cstate->current_fh.fh_export->ex_flags & NFSEXP_PNFS)) { | |
4156 | open->op_odstate = alloc_clnt_odstate(clp); | |
4157 | if (!open->op_odstate) | |
4158 | return nfserr_jukebox; | |
4159 | } | |
4160 | ||
0f442aa2 | 4161 | return nfs_ok; |
1da177e4 LT |
4162 | } |
4163 | ||
b37ad28b | 4164 | static inline __be32 |
4a6e43e6 N |
4165 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
4166 | { | |
4167 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
4168 | return nfserr_openmode; | |
4169 | else | |
4170 | return nfs_ok; | |
4171 | } | |
4172 | ||
f459e453 | 4173 | static int share_access_to_flags(u32 share_access) |
52f4fb43 | 4174 | { |
f459e453 | 4175 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
52f4fb43 N |
4176 | } |
4177 | ||
38c2f4b1 | 4178 | static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) |
24a0111e | 4179 | { |
f459e453 | 4180 | struct nfs4_stid *ret; |
24a0111e | 4181 | |
95da1b3a AE |
4182 | ret = find_stateid_by_type(cl, s, |
4183 | NFS4_DELEG_STID|NFS4_REVOKED_DELEG_STID); | |
f459e453 BF |
4184 | if (!ret) |
4185 | return NULL; | |
4186 | return delegstateid(ret); | |
24a0111e BF |
4187 | } |
4188 | ||
8b289b2c BF |
4189 | static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) |
4190 | { | |
4191 | return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || | |
4192 | open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; | |
4193 | } | |
4194 | ||
b37ad28b | 4195 | static __be32 |
41d22663 | 4196 | nfs4_check_deleg(struct nfs4_client *cl, struct nfsd4_open *open, |
567d9829 N |
4197 | struct nfs4_delegation **dp) |
4198 | { | |
4199 | int flags; | |
b37ad28b | 4200 | __be32 status = nfserr_bad_stateid; |
dcd94cc2 | 4201 | struct nfs4_delegation *deleg; |
567d9829 | 4202 | |
dcd94cc2 TM |
4203 | deleg = find_deleg_stateid(cl, &open->op_delegate_stateid); |
4204 | if (deleg == NULL) | |
c44c5eeb | 4205 | goto out; |
95da1b3a AE |
4206 | if (deleg->dl_stid.sc_type == NFS4_REVOKED_DELEG_STID) { |
4207 | nfs4_put_stid(&deleg->dl_stid); | |
4208 | if (cl->cl_minorversion) | |
4209 | status = nfserr_deleg_revoked; | |
4210 | goto out; | |
4211 | } | |
24a0111e | 4212 | flags = share_access_to_flags(open->op_share_access); |
dcd94cc2 TM |
4213 | status = nfs4_check_delegmode(deleg, flags); |
4214 | if (status) { | |
4215 | nfs4_put_stid(&deleg->dl_stid); | |
4216 | goto out; | |
4217 | } | |
4218 | *dp = deleg; | |
c44c5eeb | 4219 | out: |
8b289b2c | 4220 | if (!nfsd4_is_deleg_cur(open)) |
c44c5eeb N |
4221 | return nfs_ok; |
4222 | if (status) | |
4223 | return status; | |
dad1c067 | 4224 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
c44c5eeb | 4225 | return nfs_ok; |
567d9829 N |
4226 | } |
4227 | ||
21fb4016 BF |
4228 | static inline int nfs4_access_to_access(u32 nfs4_access) |
4229 | { | |
4230 | int flags = 0; | |
4231 | ||
4232 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
4233 | flags |= NFSD_MAY_READ; | |
4234 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
4235 | flags |= NFSD_MAY_WRITE; | |
4236 | return flags; | |
4237 | } | |
4238 | ||
7e6a72e5 CH |
4239 | static inline __be32 |
4240 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, | |
4241 | struct nfsd4_open *open) | |
4242 | { | |
4243 | struct iattr iattr = { | |
4244 | .ia_valid = ATTR_SIZE, | |
4245 | .ia_size = 0, | |
4246 | }; | |
4247 | if (!open->op_truncate) | |
4248 | return 0; | |
4249 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
4250 | return nfserr_inval; | |
4251 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); | |
4252 | } | |
4253 | ||
0c12eaff | 4254 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
6eb3a1d0 JL |
4255 | struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp, |
4256 | struct nfsd4_open *open) | |
f9d7562f | 4257 | { |
de18643d | 4258 | struct file *filp = NULL; |
f9d7562f | 4259 | __be32 status; |
0c12eaff CB |
4260 | int oflag = nfs4_access_to_omode(open->op_share_access); |
4261 | int access = nfs4_access_to_access(open->op_share_access); | |
baeb4ff0 | 4262 | unsigned char old_access_bmap, old_deny_bmap; |
0c12eaff | 4263 | |
de18643d | 4264 | spin_lock(&fp->fi_lock); |
baeb4ff0 JL |
4265 | |
4266 | /* | |
4267 | * Are we trying to set a deny mode that would conflict with | |
4268 | * current access? | |
4269 | */ | |
4270 | status = nfs4_file_check_deny(fp, open->op_share_deny); | |
4271 | if (status != nfs_ok) { | |
4272 | spin_unlock(&fp->fi_lock); | |
4273 | goto out; | |
4274 | } | |
4275 | ||
4276 | /* set access to the file */ | |
4277 | status = nfs4_file_get_access(fp, open->op_share_access); | |
4278 | if (status != nfs_ok) { | |
4279 | spin_unlock(&fp->fi_lock); | |
4280 | goto out; | |
4281 | } | |
4282 | ||
4283 | /* Set access bits in stateid */ | |
4284 | old_access_bmap = stp->st_access_bmap; | |
4285 | set_access(open->op_share_access, stp); | |
4286 | ||
4287 | /* Set new deny mask */ | |
4288 | old_deny_bmap = stp->st_deny_bmap; | |
4289 | set_deny(open->op_share_deny, stp); | |
4290 | fp->fi_share_deny |= (open->op_share_deny & NFS4_SHARE_DENY_BOTH); | |
4291 | ||
f9d7562f | 4292 | if (!fp->fi_fds[oflag]) { |
de18643d TM |
4293 | spin_unlock(&fp->fi_lock); |
4294 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, &filp); | |
f9d7562f | 4295 | if (status) |
baeb4ff0 | 4296 | goto out_put_access; |
de18643d TM |
4297 | spin_lock(&fp->fi_lock); |
4298 | if (!fp->fi_fds[oflag]) { | |
4299 | fp->fi_fds[oflag] = filp; | |
4300 | filp = NULL; | |
4301 | } | |
f9d7562f | 4302 | } |
de18643d TM |
4303 | spin_unlock(&fp->fi_lock); |
4304 | if (filp) | |
4305 | fput(filp); | |
f9d7562f | 4306 | |
7e6a72e5 CH |
4307 | status = nfsd4_truncate(rqstp, cur_fh, open); |
4308 | if (status) | |
4309 | goto out_put_access; | |
7e6a72e5 CH |
4310 | out: |
4311 | return status; | |
baeb4ff0 JL |
4312 | out_put_access: |
4313 | stp->st_access_bmap = old_access_bmap; | |
4314 | nfs4_file_put_access(fp, open->op_share_access); | |
4315 | reset_union_bmap_deny(bmap_to_share_mode(old_deny_bmap), stp); | |
4316 | goto out; | |
1da177e4 LT |
4317 | } |
4318 | ||
b37ad28b | 4319 | static __be32 |
dcef0413 | 4320 | 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 | 4321 | { |
b37ad28b | 4322 | __be32 status; |
6ac75368 | 4323 | unsigned char old_deny_bmap = stp->st_deny_bmap; |
1da177e4 | 4324 | |
6eb3a1d0 | 4325 | if (!test_access(open->op_share_access, stp)) |
baeb4ff0 | 4326 | return nfs4_get_vfs_file(rqstp, fp, cur_fh, stp, open); |
7e6a72e5 | 4327 | |
baeb4ff0 JL |
4328 | /* test and set deny mode */ |
4329 | spin_lock(&fp->fi_lock); | |
4330 | status = nfs4_file_check_deny(fp, open->op_share_deny); | |
4331 | if (status == nfs_ok) { | |
baeb4ff0 JL |
4332 | set_deny(open->op_share_deny, stp); |
4333 | fp->fi_share_deny |= | |
4334 | (open->op_share_deny & NFS4_SHARE_DENY_BOTH); | |
4335 | } | |
4336 | spin_unlock(&fp->fi_lock); | |
4337 | ||
4338 | if (status != nfs_ok) | |
1da177e4 | 4339 | return status; |
1da177e4 | 4340 | |
baeb4ff0 JL |
4341 | status = nfsd4_truncate(rqstp, cur_fh, open); |
4342 | if (status != nfs_ok) | |
4343 | reset_union_bmap_deny(old_deny_bmap, stp); | |
4344 | return status; | |
4345 | } | |
1da177e4 | 4346 | |
14a24e99 BF |
4347 | /* Should we give out recallable state?: */ |
4348 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
4349 | { | |
4350 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
4351 | return true; | |
4352 | /* | |
4353 | * In the sessions case, since we don't have to establish a | |
4354 | * separate connection for callbacks, we assume it's OK | |
4355 | * until we hear otherwise: | |
4356 | */ | |
4357 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
4358 | } | |
4359 | ||
653e514e BF |
4360 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, |
4361 | int flag) | |
22d38c4c BF |
4362 | { |
4363 | struct file_lock *fl; | |
4364 | ||
4365 | fl = locks_alloc_lock(); | |
4366 | if (!fl) | |
4367 | return NULL; | |
22d38c4c | 4368 | fl->fl_lmops = &nfsd_lease_mng_ops; |
617588d5 | 4369 | fl->fl_flags = FL_DELEG; |
22d38c4c BF |
4370 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; |
4371 | fl->fl_end = OFFSET_MAX; | |
653e514e | 4372 | fl->fl_owner = (fl_owner_t)dp; |
22d38c4c | 4373 | fl->fl_pid = current->tgid; |
353601e7 | 4374 | fl->fl_file = dp->dl_stid.sc_file->fi_deleg_file; |
22d38c4c BF |
4375 | return fl; |
4376 | } | |
4377 | ||
0b26693c JL |
4378 | static struct nfs4_delegation * |
4379 | nfs4_set_delegation(struct nfs4_client *clp, struct svc_fh *fh, | |
8287f009 | 4380 | struct nfs4_file *fp, struct nfs4_clnt_odstate *odstate) |
acfdf5c3 | 4381 | { |
68b18f52 | 4382 | int status = 0; |
0b26693c | 4383 | struct nfs4_delegation *dp; |
353601e7 BF |
4384 | struct file *filp; |
4385 | struct file_lock *fl; | |
417c6629 | 4386 | |
353601e7 BF |
4387 | /* |
4388 | * The fi_had_conflict and nfs_get_existing_delegation checks | |
4389 | * here are just optimizations; we'll need to recheck them at | |
4390 | * the end: | |
4391 | */ | |
bf7bd3e9 | 4392 | if (fp->fi_had_conflict) |
0b26693c JL |
4393 | return ERR_PTR(-EAGAIN); |
4394 | ||
353601e7 BF |
4395 | filp = find_readable_file(fp); |
4396 | if (!filp) { | |
4397 | /* We should always have a readable file here */ | |
4398 | WARN_ON_ONCE(1); | |
4399 | return ERR_PTR(-EBADF); | |
4400 | } | |
34ed9872 AE |
4401 | spin_lock(&state_lock); |
4402 | spin_lock(&fp->fi_lock); | |
68b18f52 BF |
4403 | if (nfs4_delegation_exists(clp, fp)) |
4404 | status = -EAGAIN; | |
353601e7 BF |
4405 | else if (!fp->fi_deleg_file) { |
4406 | fp->fi_deleg_file = filp; | |
4407 | /* increment early to prevent fi_deleg_file from being | |
4408 | * cleared */ | |
4409 | fp->fi_delegees = 1; | |
4410 | filp = NULL; | |
4411 | } else | |
4412 | fp->fi_delegees++; | |
34ed9872 AE |
4413 | spin_unlock(&fp->fi_lock); |
4414 | spin_unlock(&state_lock); | |
353601e7 BF |
4415 | if (filp) |
4416 | fput(filp); | |
34ed9872 AE |
4417 | if (status) |
4418 | return ERR_PTR(status); | |
4419 | ||
353601e7 | 4420 | status = -ENOMEM; |
86d29b10 | 4421 | dp = alloc_init_deleg(clp, fp, fh, odstate); |
0b26693c | 4422 | if (!dp) |
353601e7 BF |
4423 | goto out_delegees; |
4424 | ||
4425 | fl = nfs4_alloc_init_lease(dp, NFS4_OPEN_DELEGATE_READ); | |
4426 | if (!fl) | |
bd8d7250 | 4427 | goto out_clnt_odstate; |
353601e7 BF |
4428 | |
4429 | status = vfs_setlease(fp->fi_deleg_file, fl->fl_type, &fl, NULL); | |
4430 | if (fl) | |
4431 | locks_free_lock(fl); | |
4432 | if (status) | |
4433 | goto out_clnt_odstate; | |
0b26693c | 4434 | |
417c6629 JL |
4435 | spin_lock(&state_lock); |
4436 | spin_lock(&fp->fi_lock); | |
353601e7 | 4437 | if (fp->fi_had_conflict) |
417c6629 | 4438 | status = -EAGAIN; |
353601e7 BF |
4439 | else |
4440 | status = hash_delegation_locked(dp, fp); | |
417c6629 | 4441 | spin_unlock(&fp->fi_lock); |
cdc97505 | 4442 | spin_unlock(&state_lock); |
353601e7 BF |
4443 | |
4444 | if (status) | |
692ad280 AE |
4445 | goto out_unlock; |
4446 | ||
0b26693c | 4447 | return dp; |
692ad280 AE |
4448 | out_unlock: |
4449 | vfs_setlease(fp->fi_deleg_file, F_UNLCK, NULL, (void **)&dp); | |
353601e7 BF |
4450 | out_clnt_odstate: |
4451 | put_clnt_odstate(dp->dl_clnt_odstate); | |
353601e7 BF |
4452 | nfs4_put_stid(&dp->dl_stid); |
4453 | out_delegees: | |
4454 | put_deleg_file(fp); | |
4455 | return ERR_PTR(status); | |
edab9782 BF |
4456 | } |
4457 | ||
4aa8913c BH |
4458 | static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) |
4459 | { | |
4460 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
4461 | if (status == -EAGAIN) | |
4462 | open->op_why_no_deleg = WND4_CONTENTION; | |
4463 | else { | |
4464 | open->op_why_no_deleg = WND4_RESOURCE; | |
4465 | switch (open->op_deleg_want) { | |
4466 | case NFS4_SHARE_WANT_READ_DELEG: | |
4467 | case NFS4_SHARE_WANT_WRITE_DELEG: | |
4468 | case NFS4_SHARE_WANT_ANY_DELEG: | |
4469 | break; | |
4470 | case NFS4_SHARE_WANT_CANCEL: | |
4471 | open->op_why_no_deleg = WND4_CANCELLED; | |
4472 | break; | |
4473 | case NFS4_SHARE_WANT_NO_DELEG: | |
063b0fb9 | 4474 | WARN_ON_ONCE(1); |
4aa8913c BH |
4475 | } |
4476 | } | |
4477 | } | |
4478 | ||
1da177e4 LT |
4479 | /* |
4480 | * Attempt to hand out a delegation. | |
99c41515 BF |
4481 | * |
4482 | * Note we don't support write delegations, and won't until the vfs has | |
4483 | * proper support for them. | |
1da177e4 LT |
4484 | */ |
4485 | static void | |
4cf59221 JL |
4486 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, |
4487 | struct nfs4_ol_stateid *stp) | |
1da177e4 LT |
4488 | { |
4489 | struct nfs4_delegation *dp; | |
4cf59221 JL |
4490 | struct nfs4_openowner *oo = openowner(stp->st_stateowner); |
4491 | struct nfs4_client *clp = stp->st_stid.sc_client; | |
14a24e99 | 4492 | int cb_up; |
99c41515 | 4493 | int status = 0; |
1da177e4 | 4494 | |
fe0750e5 | 4495 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
7b190fec N |
4496 | open->op_recall = 0; |
4497 | switch (open->op_claim_type) { | |
4498 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 4499 | if (!cb_up) |
7b190fec | 4500 | open->op_recall = 1; |
99c41515 BF |
4501 | if (open->op_delegate_type != NFS4_OPEN_DELEGATE_READ) |
4502 | goto out_no_deleg; | |
7b190fec N |
4503 | break; |
4504 | case NFS4_OPEN_CLAIM_NULL: | |
ed47b062 | 4505 | case NFS4_OPEN_CLAIM_FH: |
99c41515 BF |
4506 | /* |
4507 | * Let's not give out any delegations till everyone's | |
c87fb4a3 BF |
4508 | * had the chance to reclaim theirs, *and* until |
4509 | * NLM locks have all been reclaimed: | |
99c41515 | 4510 | */ |
4cf59221 | 4511 | if (locks_in_grace(clp->net)) |
99c41515 | 4512 | goto out_no_deleg; |
dad1c067 | 4513 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
99c41515 | 4514 | goto out_no_deleg; |
9a0590ae SD |
4515 | /* |
4516 | * Also, if the file was opened for write or | |
4517 | * create, there's a good chance the client's | |
4518 | * about to write to it, resulting in an | |
4519 | * immediate recall (since we don't support | |
4520 | * write delegations): | |
4521 | */ | |
7b190fec | 4522 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
99c41515 BF |
4523 | goto out_no_deleg; |
4524 | if (open->op_create == NFS4_OPEN_CREATE) | |
4525 | goto out_no_deleg; | |
7b190fec N |
4526 | break; |
4527 | default: | |
99c41515 | 4528 | goto out_no_deleg; |
7b190fec | 4529 | } |
8287f009 | 4530 | dp = nfs4_set_delegation(clp, fh, stp->st_stid.sc_file, stp->st_clnt_odstate); |
0b26693c | 4531 | if (IS_ERR(dp)) |
dd239cc0 | 4532 | goto out_no_deleg; |
1da177e4 | 4533 | |
d5477a8d | 4534 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 4535 | |
8c10cbdb | 4536 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
d5477a8d | 4537 | STATEID_VAL(&dp->dl_stid.sc_stateid)); |
99c41515 | 4538 | open->op_delegate_type = NFS4_OPEN_DELEGATE_READ; |
67cb1279 | 4539 | nfs4_put_stid(&dp->dl_stid); |
dd239cc0 | 4540 | return; |
dd239cc0 | 4541 | out_no_deleg: |
99c41515 BF |
4542 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE; |
4543 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && | |
d08d32e6 | 4544 | open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) { |
99c41515 | 4545 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
d08d32e6 BF |
4546 | open->op_recall = 1; |
4547 | } | |
99c41515 BF |
4548 | |
4549 | /* 4.1 client asking for a delegation? */ | |
4550 | if (open->op_deleg_want) | |
4551 | nfsd4_open_deleg_none_ext(open, status); | |
4552 | return; | |
1da177e4 LT |
4553 | } |
4554 | ||
e27f49c3 BH |
4555 | static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, |
4556 | struct nfs4_delegation *dp) | |
4557 | { | |
4558 | if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && | |
4559 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
4560 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
4561 | open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; | |
4562 | } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && | |
4563 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
4564 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
4565 | open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; | |
4566 | } | |
4567 | /* Otherwise the client must be confused wanting a delegation | |
4568 | * it already has, therefore we don't return | |
4569 | * NFS4_OPEN_DELEGATE_NONE_EXT and reason. | |
4570 | */ | |
4571 | } | |
4572 | ||
b37ad28b | 4573 | __be32 |
1da177e4 LT |
4574 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
4575 | { | |
6668958f | 4576 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
38c2f4b1 | 4577 | struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; |
1da177e4 | 4578 | struct nfs4_file *fp = NULL; |
dcef0413 | 4579 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 4580 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 4581 | __be32 status; |
d8a1a000 | 4582 | bool new_stp = false; |
1da177e4 | 4583 | |
1da177e4 LT |
4584 | /* |
4585 | * Lookup file; if found, lookup stateid and check open request, | |
4586 | * and check for delegations in the process of being recalled. | |
4587 | * If not found, create the nfs4_file struct | |
4588 | */ | |
f9c00c3a | 4589 | fp = find_or_add_file(open->op_file, ¤t_fh->fh_handle); |
950e0118 | 4590 | if (fp != open->op_file) { |
41d22663 | 4591 | status = nfs4_check_deleg(cl, open, &dp); |
c44c5eeb N |
4592 | if (status) |
4593 | goto out; | |
15ca08d3 | 4594 | stp = nfsd4_find_and_lock_existing_open(fp, open); |
1da177e4 | 4595 | } else { |
950e0118 | 4596 | open->op_file = NULL; |
c44c5eeb | 4597 | status = nfserr_bad_stateid; |
8b289b2c | 4598 | if (nfsd4_is_deleg_cur(open)) |
c44c5eeb | 4599 | goto out; |
1da177e4 LT |
4600 | } |
4601 | ||
d8a1a000 TM |
4602 | if (!stp) { |
4603 | stp = init_open_stateid(fp, open); | |
4604 | if (!open->op_stp) | |
4605 | new_stp = true; | |
4606 | } | |
4607 | ||
1da177e4 LT |
4608 | /* |
4609 | * OPEN the file, or upgrade an existing OPEN. | |
4610 | * If truncate fails, the OPEN fails. | |
d8a1a000 TM |
4611 | * |
4612 | * stp is already locked. | |
1da177e4 | 4613 | */ |
d8a1a000 | 4614 | if (!new_stp) { |
1da177e4 | 4615 | /* Stateid was found, this is an OPEN upgrade */ |
f9d7562f | 4616 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
35a92fe8 | 4617 | if (status) { |
feb9dad5 | 4618 | mutex_unlock(&stp->st_mutex); |
1da177e4 | 4619 | goto out; |
35a92fe8 | 4620 | } |
1da177e4 | 4621 | } else { |
6eb3a1d0 JL |
4622 | status = nfs4_get_vfs_file(rqstp, fp, current_fh, stp, open); |
4623 | if (status) { | |
d8a1a000 | 4624 | stp->st_stid.sc_type = NFS4_CLOSED_STID; |
6eb3a1d0 | 4625 | release_open_stateid(stp); |
d8a1a000 | 4626 | mutex_unlock(&stp->st_mutex); |
6eb3a1d0 JL |
4627 | goto out; |
4628 | } | |
8287f009 SB |
4629 | |
4630 | stp->st_clnt_odstate = find_or_hash_clnt_odstate(fp, | |
4631 | open->op_odstate); | |
4632 | if (stp->st_clnt_odstate == open->op_odstate) | |
4633 | open->op_odstate = NULL; | |
1da177e4 | 4634 | } |
d8a1a000 | 4635 | |
9767feb2 | 4636 | nfs4_inc_and_copy_stateid(&open->op_stateid, &stp->st_stid); |
feb9dad5 | 4637 | mutex_unlock(&stp->st_mutex); |
1da177e4 | 4638 | |
d24433cd | 4639 | if (nfsd4_has_session(&resp->cstate)) { |
d24433cd BH |
4640 | if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { |
4641 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
4642 | open->op_why_no_deleg = WND4_NOT_WANTED; | |
4643 | goto nodeleg; | |
4644 | } | |
4645 | } | |
4646 | ||
1da177e4 LT |
4647 | /* |
4648 | * Attempt to hand out a delegation. No error return, because the | |
4649 | * OPEN succeeds even if we fail. | |
4650 | */ | |
4cf59221 | 4651 | nfs4_open_delegation(current_fh, open, stp); |
d24433cd | 4652 | nodeleg: |
1da177e4 LT |
4653 | status = nfs_ok; |
4654 | ||
8c10cbdb | 4655 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
dcef0413 | 4656 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
1da177e4 | 4657 | out: |
d24433cd BH |
4658 | /* 4.1 client trying to upgrade/downgrade delegation? */ |
4659 | if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && | |
e27f49c3 BH |
4660 | open->op_deleg_want) |
4661 | nfsd4_deleg_xgrade_none_ext(open, dp); | |
d24433cd | 4662 | |
13cd2184 N |
4663 | if (fp) |
4664 | put_nfs4_file(fp); | |
37515177 | 4665 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
87186022 | 4666 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
1da177e4 LT |
4667 | /* |
4668 | * To finish the open response, we just need to set the rflags. | |
4669 | */ | |
4670 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
19e4c347 JL |
4671 | if (nfsd4_has_session(&resp->cstate)) |
4672 | open->op_rflags |= NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK; | |
4673 | else if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED)) | |
1da177e4 | 4674 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
19e4c347 | 4675 | |
dcd94cc2 TM |
4676 | if (dp) |
4677 | nfs4_put_stid(&dp->dl_stid); | |
d6f2bc5d TM |
4678 | if (stp) |
4679 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 LT |
4680 | |
4681 | return status; | |
4682 | } | |
4683 | ||
58fb12e6 | 4684 | void nfsd4_cleanup_open_state(struct nfsd4_compound_state *cstate, |
42297899 | 4685 | struct nfsd4_open *open) |
d29b20cd BF |
4686 | { |
4687 | if (open->op_openowner) { | |
d3134b10 JL |
4688 | struct nfs4_stateowner *so = &open->op_openowner->oo_owner; |
4689 | ||
4690 | nfsd4_cstate_assign_replay(cstate, so); | |
4691 | nfs4_put_stateowner(so); | |
d29b20cd | 4692 | } |
32513b40 | 4693 | if (open->op_file) |
5b095e99 | 4694 | kmem_cache_free(file_slab, open->op_file); |
4cdc951b | 4695 | if (open->op_stp) |
6011695d | 4696 | nfs4_put_stid(&open->op_stp->st_stid); |
8287f009 SB |
4697 | if (open->op_odstate) |
4698 | kmem_cache_free(odstate_slab, open->op_odstate); | |
d29b20cd BF |
4699 | } |
4700 | ||
b37ad28b | 4701 | __be32 |
b591480b | 4702 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 4703 | union nfsd4_op_u *u) |
1da177e4 | 4704 | { |
eb69853d | 4705 | clientid_t *clid = &u->renew; |
1da177e4 | 4706 | struct nfs4_client *clp; |
b37ad28b | 4707 | __be32 status; |
7f2210fa | 4708 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4709 | |
1da177e4 LT |
4710 | dprintk("process_renew(%08x/%08x): starting\n", |
4711 | clid->cl_boot, clid->cl_id); | |
4b24ca7d | 4712 | status = lookup_clientid(clid, cstate, nn); |
9b2ef62b | 4713 | if (status) |
1da177e4 | 4714 | goto out; |
4b24ca7d | 4715 | clp = cstate->clp; |
1da177e4 | 4716 | status = nfserr_cb_path_down; |
ea1da636 | 4717 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 4718 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
4719 | goto out; |
4720 | status = nfs_ok; | |
4721 | out: | |
1da177e4 LT |
4722 | return status; |
4723 | } | |
4724 | ||
7f5ef2e9 | 4725 | void |
12760c66 | 4726 | nfsd4_end_grace(struct nfsd_net *nn) |
a76b4319 | 4727 | { |
33dcc481 | 4728 | /* do nothing if grace period already ended */ |
a51c84ed | 4729 | if (nn->grace_ended) |
33dcc481 JL |
4730 | return; |
4731 | ||
a51c84ed | 4732 | nn->grace_ended = true; |
70b28235 BF |
4733 | /* |
4734 | * If the server goes down again right now, an NFSv4 | |
4735 | * client will still be allowed to reclaim after it comes back up, | |
4736 | * even if it hasn't yet had a chance to reclaim state this time. | |
4737 | * | |
4738 | */ | |
919b8049 | 4739 | nfsd4_record_grace_done(nn); |
70b28235 BF |
4740 | /* |
4741 | * At this point, NFSv4 clients can still reclaim. But if the | |
4742 | * server crashes, any that have not yet reclaimed will be out | |
4743 | * of luck on the next boot. | |
4744 | * | |
4745 | * (NFSv4.1+ clients are considered to have reclaimed once they | |
4746 | * call RECLAIM_COMPLETE. NFSv4.0 clients are considered to | |
4747 | * have reclaimed after their first OPEN.) | |
4748 | */ | |
5e1533c7 | 4749 | locks_end_grace(&nn->nfsd4_manager); |
70b28235 BF |
4750 | /* |
4751 | * At this point, and once lockd and/or any other containers | |
4752 | * exit their grace period, further reclaims will fail and | |
4753 | * regular locking can resume. | |
4754 | */ | |
a76b4319 N |
4755 | } |
4756 | ||
03f318ca BF |
4757 | /* |
4758 | * If we've waited a lease period but there are still clients trying to | |
4759 | * reclaim, wait a little longer to give them a chance to finish. | |
4760 | */ | |
4761 | static bool clients_still_reclaiming(struct nfsd_net *nn) | |
4762 | { | |
4763 | unsigned long now = get_seconds(); | |
4764 | unsigned long double_grace_period_end = nn->boot_time + | |
4765 | 2 * nn->nfsd4_lease; | |
4766 | ||
362063a5 SM |
4767 | if (nn->track_reclaim_completes && |
4768 | atomic_read(&nn->nr_reclaim_complete) == | |
4769 | nn->reclaim_str_hashtbl_size) | |
4770 | return false; | |
03f318ca BF |
4771 | if (!nn->somebody_reclaimed) |
4772 | return false; | |
4773 | nn->somebody_reclaimed = false; | |
4774 | /* | |
4775 | * If we've given them *two* lease times to reclaim, and they're | |
4776 | * still not done, give up: | |
4777 | */ | |
4778 | if (time_after(now, double_grace_period_end)) | |
4779 | return false; | |
4780 | return true; | |
4781 | } | |
4782 | ||
fd39ca9a | 4783 | static time_t |
09121281 | 4784 | nfs4_laundromat(struct nfsd_net *nn) |
1da177e4 LT |
4785 | { |
4786 | struct nfs4_client *clp; | |
fe0750e5 | 4787 | struct nfs4_openowner *oo; |
1da177e4 | 4788 | struct nfs4_delegation *dp; |
217526e7 | 4789 | struct nfs4_ol_stateid *stp; |
7919d0a2 | 4790 | struct nfsd4_blocked_lock *nbl; |
1da177e4 | 4791 | struct list_head *pos, *next, reaplist; |
3d733711 | 4792 | time_t cutoff = get_seconds() - nn->nfsd4_lease; |
a832e7ae | 4793 | time_t t, new_timeo = nn->nfsd4_lease; |
1da177e4 | 4794 | |
1da177e4 | 4795 | dprintk("NFSD: laundromat service - starting\n"); |
03f318ca BF |
4796 | |
4797 | if (clients_still_reclaiming(nn)) { | |
4798 | new_timeo = 0; | |
4799 | goto out; | |
4800 | } | |
362063a5 | 4801 | dprintk("NFSD: end of grace period\n"); |
12760c66 | 4802 | nfsd4_end_grace(nn); |
36acb66b | 4803 | INIT_LIST_HEAD(&reaplist); |
c9a49628 | 4804 | spin_lock(&nn->client_lock); |
5ed58bb2 | 4805 | list_for_each_safe(pos, next, &nn->client_lru) { |
1da177e4 LT |
4806 | clp = list_entry(pos, struct nfs4_client, cl_lru); |
4807 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
4808 | t = clp->cl_time - cutoff; | |
a832e7ae | 4809 | new_timeo = min(new_timeo, t); |
1da177e4 LT |
4810 | break; |
4811 | } | |
221a6876 | 4812 | if (mark_client_expired_locked(clp)) { |
d7682988 BH |
4813 | dprintk("NFSD: client in use (clientid %08x)\n", |
4814 | clp->cl_clientid.cl_id); | |
4815 | continue; | |
4816 | } | |
4864af97 | 4817 | list_add(&clp->cl_lru, &reaplist); |
36acb66b | 4818 | } |
c9a49628 | 4819 | spin_unlock(&nn->client_lock); |
36acb66b BH |
4820 | list_for_each_safe(pos, next, &reaplist) { |
4821 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
4822 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
4823 | clp->cl_clientid.cl_id); | |
4864af97 | 4824 | list_del_init(&clp->cl_lru); |
1da177e4 LT |
4825 | expire_client(clp); |
4826 | } | |
cdc97505 | 4827 | spin_lock(&state_lock); |
e8c69d17 | 4828 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 LT |
4829 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
4830 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
a832e7ae JL |
4831 | t = dp->dl_time - cutoff; |
4832 | new_timeo = min(new_timeo, t); | |
1da177e4 LT |
4833 | break; |
4834 | } | |
3fcbbd24 | 4835 | WARN_ON(!unhash_delegation_locked(dp)); |
42690676 | 4836 | list_add(&dp->dl_recall_lru, &reaplist); |
1da177e4 | 4837 | } |
cdc97505 | 4838 | spin_unlock(&state_lock); |
2d4a532d JL |
4839 | while (!list_empty(&reaplist)) { |
4840 | dp = list_first_entry(&reaplist, struct nfs4_delegation, | |
4841 | dl_recall_lru); | |
4842 | list_del_init(&dp->dl_recall_lru); | |
3bd64a5b | 4843 | revoke_delegation(dp); |
1da177e4 | 4844 | } |
217526e7 JL |
4845 | |
4846 | spin_lock(&nn->client_lock); | |
4847 | while (!list_empty(&nn->close_lru)) { | |
4848 | oo = list_first_entry(&nn->close_lru, struct nfs4_openowner, | |
4849 | oo_close_lru); | |
4850 | if (time_after((unsigned long)oo->oo_time, | |
4851 | (unsigned long)cutoff)) { | |
a832e7ae JL |
4852 | t = oo->oo_time - cutoff; |
4853 | new_timeo = min(new_timeo, t); | |
1da177e4 LT |
4854 | break; |
4855 | } | |
217526e7 JL |
4856 | list_del_init(&oo->oo_close_lru); |
4857 | stp = oo->oo_last_closed_stid; | |
4858 | oo->oo_last_closed_stid = NULL; | |
4859 | spin_unlock(&nn->client_lock); | |
4860 | nfs4_put_stid(&stp->st_stid); | |
4861 | spin_lock(&nn->client_lock); | |
1da177e4 | 4862 | } |
217526e7 JL |
4863 | spin_unlock(&nn->client_lock); |
4864 | ||
7919d0a2 JL |
4865 | /* |
4866 | * It's possible for a client to try and acquire an already held lock | |
4867 | * that is being held for a long time, and then lose interest in it. | |
4868 | * So, we clean out any un-revisited request after a lease period | |
4869 | * under the assumption that the client is no longer interested. | |
4870 | * | |
4871 | * RFC5661, sec. 9.6 states that the client must not rely on getting | |
4872 | * notifications and must continue to poll for locks, even when the | |
4873 | * server supports them. Thus this shouldn't lead to clients blocking | |
4874 | * indefinitely once the lock does become free. | |
4875 | */ | |
4876 | BUG_ON(!list_empty(&reaplist)); | |
0cc11a61 | 4877 | spin_lock(&nn->blocked_locks_lock); |
7919d0a2 JL |
4878 | while (!list_empty(&nn->blocked_locks_lru)) { |
4879 | nbl = list_first_entry(&nn->blocked_locks_lru, | |
4880 | struct nfsd4_blocked_lock, nbl_lru); | |
4881 | if (time_after((unsigned long)nbl->nbl_time, | |
4882 | (unsigned long)cutoff)) { | |
4883 | t = nbl->nbl_time - cutoff; | |
4884 | new_timeo = min(new_timeo, t); | |
4885 | break; | |
4886 | } | |
4887 | list_move(&nbl->nbl_lru, &reaplist); | |
4888 | list_del_init(&nbl->nbl_list); | |
4889 | } | |
0cc11a61 | 4890 | spin_unlock(&nn->blocked_locks_lock); |
7919d0a2 JL |
4891 | |
4892 | while (!list_empty(&reaplist)) { | |
64ebe124 | 4893 | nbl = list_first_entry(&reaplist, |
7919d0a2 JL |
4894 | struct nfsd4_blocked_lock, nbl_lru); |
4895 | list_del_init(&nbl->nbl_lru); | |
7919d0a2 JL |
4896 | free_blocked_lock(nbl); |
4897 | } | |
03f318ca | 4898 | out: |
a832e7ae | 4899 | new_timeo = max_t(time_t, new_timeo, NFSD_LAUNDROMAT_MINTIMEOUT); |
a832e7ae | 4900 | return new_timeo; |
1da177e4 LT |
4901 | } |
4902 | ||
a254b246 HH |
4903 | static struct workqueue_struct *laundry_wq; |
4904 | static void laundromat_main(struct work_struct *); | |
a254b246 HH |
4905 | |
4906 | static void | |
09121281 | 4907 | laundromat_main(struct work_struct *laundry) |
1da177e4 LT |
4908 | { |
4909 | time_t t; | |
2e55f3ab | 4910 | struct delayed_work *dwork = to_delayed_work(laundry); |
09121281 SK |
4911 | struct nfsd_net *nn = container_of(dwork, struct nfsd_net, |
4912 | laundromat_work); | |
1da177e4 | 4913 | |
09121281 | 4914 | t = nfs4_laundromat(nn); |
1da177e4 | 4915 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); |
09121281 | 4916 | queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ); |
1da177e4 LT |
4917 | } |
4918 | ||
8fcd461d | 4919 | static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stid *stp) |
1da177e4 | 4920 | { |
8fcd461d | 4921 | if (!fh_match(&fhp->fh_handle, &stp->sc_file->fi_fhandle)) |
f7a4d872 BF |
4922 | return nfserr_bad_stateid; |
4923 | return nfs_ok; | |
1da177e4 LT |
4924 | } |
4925 | ||
1da177e4 | 4926 | static inline int |
82c5ff1b | 4927 | access_permit_read(struct nfs4_ol_stateid *stp) |
1da177e4 | 4928 | { |
82c5ff1b JL |
4929 | return test_access(NFS4_SHARE_ACCESS_READ, stp) || |
4930 | test_access(NFS4_SHARE_ACCESS_BOTH, stp) || | |
4931 | test_access(NFS4_SHARE_ACCESS_WRITE, stp); | |
1da177e4 LT |
4932 | } |
4933 | ||
4934 | static inline int | |
82c5ff1b | 4935 | access_permit_write(struct nfs4_ol_stateid *stp) |
1da177e4 | 4936 | { |
82c5ff1b JL |
4937 | return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || |
4938 | test_access(NFS4_SHARE_ACCESS_BOTH, stp); | |
1da177e4 LT |
4939 | } |
4940 | ||
4941 | static | |
dcef0413 | 4942 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
1da177e4 | 4943 | { |
b37ad28b | 4944 | __be32 status = nfserr_openmode; |
1da177e4 | 4945 | |
02921914 BF |
4946 | /* For lock stateid's, we test the parent open, not the lock: */ |
4947 | if (stp->st_openstp) | |
4948 | stp = stp->st_openstp; | |
82c5ff1b | 4949 | if ((flags & WR_STATE) && !access_permit_write(stp)) |
1da177e4 | 4950 | goto out; |
82c5ff1b | 4951 | if ((flags & RD_STATE) && !access_permit_read(stp)) |
1da177e4 LT |
4952 | goto out; |
4953 | status = nfs_ok; | |
4954 | out: | |
4955 | return status; | |
4956 | } | |
4957 | ||
b37ad28b | 4958 | static inline __be32 |
5ccb0066 | 4959 | check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags) |
1da177e4 | 4960 | { |
203a8c8e | 4961 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 4962 | return nfs_ok; |
c87fb4a3 | 4963 | else if (opens_in_grace(net)) { |
25985edc | 4964 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
4965 | * conflicting state; so we must wait out the grace period. */ |
4966 | return nfserr_grace; | |
4967 | } else if (flags & WR_STATE) | |
4968 | return nfs4_share_conflict(current_fh, | |
4969 | NFS4_SHARE_DENY_WRITE); | |
4970 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
4971 | return nfs4_share_conflict(current_fh, | |
4972 | NFS4_SHARE_DENY_READ); | |
4973 | } | |
4974 | ||
4975 | /* | |
4976 | * Allow READ/WRITE during grace period on recovered state only for files | |
4977 | * that are not able to provide mandatory locking. | |
4978 | */ | |
4979 | static inline int | |
5ccb0066 | 4980 | grace_disallows_io(struct net *net, struct inode *inode) |
1da177e4 | 4981 | { |
c87fb4a3 | 4982 | return opens_in_grace(net) && mandatory_lock(inode); |
1da177e4 LT |
4983 | } |
4984 | ||
57b7b43b | 4985 | static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 4986 | { |
6668958f AA |
4987 | /* |
4988 | * When sessions are used the stateid generation number is ignored | |
4989 | * when it is zero. | |
4990 | */ | |
28dde241 | 4991 | if (has_session && in->si_generation == 0) |
81b82965 BF |
4992 | return nfs_ok; |
4993 | ||
4994 | if (in->si_generation == ref->si_generation) | |
4995 | return nfs_ok; | |
6668958f | 4996 | |
0836f587 | 4997 | /* If the client sends us a stateid from the future, it's buggy: */ |
14b7f4a1 | 4998 | if (nfsd4_stateid_generation_after(in, ref)) |
0836f587 BF |
4999 | return nfserr_bad_stateid; |
5000 | /* | |
81b82965 BF |
5001 | * However, we could see a stateid from the past, even from a |
5002 | * non-buggy client. For example, if the client sends a lock | |
5003 | * while some IO is outstanding, the lock may bump si_generation | |
5004 | * while the IO is still in flight. The client could avoid that | |
5005 | * situation by waiting for responses on all the IO requests, | |
5006 | * but better performance may result in retrying IO that | |
5007 | * receives an old_stateid error if requests are rarely | |
5008 | * reordered in flight: | |
0836f587 | 5009 | */ |
81b82965 | 5010 | return nfserr_old_stateid; |
0836f587 BF |
5011 | } |
5012 | ||
03da3169 TM |
5013 | static __be32 nfsd4_stid_check_stateid_generation(stateid_t *in, struct nfs4_stid *s, bool has_session) |
5014 | { | |
5015 | __be32 ret; | |
5016 | ||
5017 | spin_lock(&s->sc_lock); | |
5018 | ret = nfsd4_verify_open_stid(s); | |
5019 | if (ret == nfs_ok) | |
5020 | ret = check_stateid_generation(in, &s->sc_stateid, has_session); | |
5021 | spin_unlock(&s->sc_lock); | |
5022 | return ret; | |
5023 | } | |
5024 | ||
ebe9cb3b CH |
5025 | static __be32 nfsd4_check_openowner_confirmed(struct nfs4_ol_stateid *ols) |
5026 | { | |
5027 | if (ols->st_stateowner->so_is_open_owner && | |
5028 | !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) | |
5029 | return nfserr_bad_stateid; | |
5030 | return nfs_ok; | |
5031 | } | |
5032 | ||
7df302f7 | 5033 | static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) |
17456804 | 5034 | { |
97b7e3b6 | 5035 | struct nfs4_stid *s; |
1af71cc8 | 5036 | __be32 status = nfserr_bad_stateid; |
17456804 | 5037 | |
ae254dac AE |
5038 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid) || |
5039 | CLOSE_STATEID(stateid)) | |
1af71cc8 | 5040 | return status; |
7df302f7 CL |
5041 | /* Client debugging aid. */ |
5042 | if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) { | |
5043 | char addr_str[INET6_ADDRSTRLEN]; | |
5044 | rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str, | |
5045 | sizeof(addr_str)); | |
5046 | pr_warn_ratelimited("NFSD: client %s testing state ID " | |
5047 | "with incorrect client ID\n", addr_str); | |
1af71cc8 | 5048 | return status; |
7df302f7 | 5049 | } |
1af71cc8 JL |
5050 | spin_lock(&cl->cl_lock); |
5051 | s = find_stateid_locked(cl, stateid); | |
97b7e3b6 | 5052 | if (!s) |
1af71cc8 | 5053 | goto out_unlock; |
03da3169 | 5054 | status = nfsd4_stid_check_stateid_generation(stateid, s, 1); |
17456804 | 5055 | if (status) |
1af71cc8 | 5056 | goto out_unlock; |
23340032 BF |
5057 | switch (s->sc_type) { |
5058 | case NFS4_DELEG_STID: | |
1af71cc8 JL |
5059 | status = nfs_ok; |
5060 | break; | |
3bd64a5b | 5061 | case NFS4_REVOKED_DELEG_STID: |
1af71cc8 JL |
5062 | status = nfserr_deleg_revoked; |
5063 | break; | |
23340032 BF |
5064 | case NFS4_OPEN_STID: |
5065 | case NFS4_LOCK_STID: | |
ebe9cb3b | 5066 | status = nfsd4_check_openowner_confirmed(openlockstateid(s)); |
1af71cc8 | 5067 | break; |
23340032 BF |
5068 | default: |
5069 | printk("unknown stateid type %x\n", s->sc_type); | |
b0fc29d6 | 5070 | /* Fallthrough */ |
23340032 | 5071 | case NFS4_CLOSED_STID: |
b0fc29d6 | 5072 | case NFS4_CLOSED_DELEG_STID: |
1af71cc8 | 5073 | status = nfserr_bad_stateid; |
23340032 | 5074 | } |
1af71cc8 JL |
5075 | out_unlock: |
5076 | spin_unlock(&cl->cl_lock); | |
5077 | return status; | |
17456804 BS |
5078 | } |
5079 | ||
cd61c522 | 5080 | __be32 |
2dd6e458 TM |
5081 | nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate, |
5082 | stateid_t *stateid, unsigned char typemask, | |
5083 | struct nfs4_stid **s, struct nfsd_net *nn) | |
38c2f4b1 | 5084 | { |
0eb6f20a | 5085 | __be32 status; |
95da1b3a AE |
5086 | bool return_revoked = false; |
5087 | ||
5088 | /* | |
5089 | * only return revoked delegations if explicitly asked. | |
5090 | * otherwise we report revoked or bad_stateid status. | |
5091 | */ | |
5092 | if (typemask & NFS4_REVOKED_DELEG_STID) | |
5093 | return_revoked = true; | |
5094 | else if (typemask & NFS4_DELEG_STID) | |
5095 | typemask |= NFS4_REVOKED_DELEG_STID; | |
38c2f4b1 | 5096 | |
ae254dac AE |
5097 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid) || |
5098 | CLOSE_STATEID(stateid)) | |
38c2f4b1 | 5099 | return nfserr_bad_stateid; |
4b24ca7d | 5100 | status = lookup_clientid(&stateid->si_opaque.so_clid, cstate, nn); |
a8a7c677 | 5101 | if (status == nfserr_stale_clientid) { |
4b24ca7d | 5102 | if (cstate->session) |
a8a7c677 | 5103 | return nfserr_bad_stateid; |
38c2f4b1 | 5104 | return nfserr_stale_stateid; |
a8a7c677 | 5105 | } |
0eb6f20a BF |
5106 | if (status) |
5107 | return status; | |
4b24ca7d | 5108 | *s = find_stateid_by_type(cstate->clp, stateid, typemask); |
38c2f4b1 BF |
5109 | if (!*s) |
5110 | return nfserr_bad_stateid; | |
95da1b3a AE |
5111 | if (((*s)->sc_type == NFS4_REVOKED_DELEG_STID) && !return_revoked) { |
5112 | nfs4_put_stid(*s); | |
5113 | if (cstate->minorversion) | |
5114 | return nfserr_deleg_revoked; | |
5115 | return nfserr_bad_stateid; | |
5116 | } | |
38c2f4b1 | 5117 | return nfs_ok; |
38c2f4b1 BF |
5118 | } |
5119 | ||
a0649b2d CH |
5120 | static struct file * |
5121 | nfs4_find_file(struct nfs4_stid *s, int flags) | |
5122 | { | |
af90f707 CH |
5123 | if (!s) |
5124 | return NULL; | |
5125 | ||
a0649b2d CH |
5126 | switch (s->sc_type) { |
5127 | case NFS4_DELEG_STID: | |
5128 | if (WARN_ON_ONCE(!s->sc_file->fi_deleg_file)) | |
5129 | return NULL; | |
5130 | return get_file(s->sc_file->fi_deleg_file); | |
5131 | case NFS4_OPEN_STID: | |
5132 | case NFS4_LOCK_STID: | |
5133 | if (flags & RD_STATE) | |
5134 | return find_readable_file(s->sc_file); | |
5135 | else | |
5136 | return find_writeable_file(s->sc_file); | |
5137 | break; | |
5138 | } | |
5139 | ||
5140 | return NULL; | |
5141 | } | |
5142 | ||
5143 | static __be32 | |
d8836f77 | 5144 | nfs4_check_olstateid(struct nfs4_ol_stateid *ols, int flags) |
a0649b2d CH |
5145 | { |
5146 | __be32 status; | |
5147 | ||
a0649b2d CH |
5148 | status = nfsd4_check_openowner_confirmed(ols); |
5149 | if (status) | |
5150 | return status; | |
5151 | return nfs4_check_openmode(ols, flags); | |
5152 | } | |
5153 | ||
af90f707 CH |
5154 | static __be32 |
5155 | nfs4_check_file(struct svc_rqst *rqstp, struct svc_fh *fhp, struct nfs4_stid *s, | |
5156 | struct file **filpp, bool *tmp_file, int flags) | |
5157 | { | |
5158 | int acc = (flags & RD_STATE) ? NFSD_MAY_READ : NFSD_MAY_WRITE; | |
5159 | struct file *file; | |
5160 | __be32 status; | |
5161 | ||
5162 | file = nfs4_find_file(s, flags); | |
5163 | if (file) { | |
5164 | status = nfsd_permission(rqstp, fhp->fh_export, fhp->fh_dentry, | |
5165 | acc | NFSD_MAY_OWNER_OVERRIDE); | |
5166 | if (status) { | |
5167 | fput(file); | |
5168 | return status; | |
5169 | } | |
5170 | ||
5171 | *filpp = file; | |
5172 | } else { | |
5173 | status = nfsd_open(rqstp, fhp, S_IFREG, acc, filpp); | |
5174 | if (status) | |
5175 | return status; | |
5176 | ||
5177 | if (tmp_file) | |
5178 | *tmp_file = true; | |
5179 | } | |
5180 | ||
5181 | return 0; | |
5182 | } | |
5183 | ||
1da177e4 | 5184 | /* |
a0649b2d CH |
5185 | * Checks for stateid operations |
5186 | */ | |
b37ad28b | 5187 | __be32 |
af90f707 | 5188 | nfs4_preprocess_stateid_op(struct svc_rqst *rqstp, |
aa0d6aed AS |
5189 | struct nfsd4_compound_state *cstate, struct svc_fh *fhp, |
5190 | stateid_t *stateid, int flags, struct file **filpp, bool *tmp_file) | |
1da177e4 | 5191 | { |
a0649b2d | 5192 | struct inode *ino = d_inode(fhp->fh_dentry); |
af90f707 | 5193 | struct net *net = SVC_NET(rqstp); |
3320fef1 | 5194 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
af90f707 | 5195 | struct nfs4_stid *s = NULL; |
b37ad28b | 5196 | __be32 status; |
1da177e4 | 5197 | |
1da177e4 LT |
5198 | if (filpp) |
5199 | *filpp = NULL; | |
af90f707 CH |
5200 | if (tmp_file) |
5201 | *tmp_file = false; | |
1da177e4 | 5202 | |
5ccb0066 | 5203 | if (grace_disallows_io(net, ino)) |
1da177e4 LT |
5204 | return nfserr_grace; |
5205 | ||
af90f707 CH |
5206 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { |
5207 | status = check_special_stateids(net, fhp, stateid, flags); | |
5208 | goto done; | |
5209 | } | |
1da177e4 | 5210 | |
2dd6e458 | 5211 | status = nfsd4_lookup_stateid(cstate, stateid, |
db24b3b4 | 5212 | NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, |
2dd6e458 | 5213 | &s, nn); |
38c2f4b1 | 5214 | if (status) |
c2d1d6a8 | 5215 | return status; |
03da3169 | 5216 | status = nfsd4_stid_check_stateid_generation(stateid, s, |
a0649b2d | 5217 | nfsd4_has_session(cstate)); |
69064a27 BF |
5218 | if (status) |
5219 | goto out; | |
a0649b2d | 5220 | |
f7a4d872 BF |
5221 | switch (s->sc_type) { |
5222 | case NFS4_DELEG_STID: | |
a0649b2d | 5223 | status = nfs4_check_delegmode(delegstateid(s), flags); |
f7a4d872 BF |
5224 | break; |
5225 | case NFS4_OPEN_STID: | |
5226 | case NFS4_LOCK_STID: | |
d8836f77 | 5227 | status = nfs4_check_olstateid(openlockstateid(s), flags); |
f7a4d872 BF |
5228 | break; |
5229 | default: | |
14bcab1a | 5230 | status = nfserr_bad_stateid; |
a0649b2d CH |
5231 | break; |
5232 | } | |
8fcd461d JL |
5233 | if (status) |
5234 | goto out; | |
5235 | status = nfs4_check_fh(fhp, s); | |
a0649b2d | 5236 | |
af90f707 CH |
5237 | done: |
5238 | if (!status && filpp) | |
5239 | status = nfs4_check_file(rqstp, fhp, s, filpp, tmp_file, flags); | |
1da177e4 | 5240 | out: |
af90f707 CH |
5241 | if (s) |
5242 | nfs4_put_stid(s); | |
1da177e4 LT |
5243 | return status; |
5244 | } | |
5245 | ||
17456804 BS |
5246 | /* |
5247 | * Test if the stateid is valid | |
5248 | */ | |
5249 | __be32 | |
5250 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
eb69853d | 5251 | union nfsd4_op_u *u) |
17456804 | 5252 | { |
eb69853d | 5253 | struct nfsd4_test_stateid *test_stateid = &u->test_stateid; |
03cfb420 BS |
5254 | struct nfsd4_test_stateid_id *stateid; |
5255 | struct nfs4_client *cl = cstate->session->se_client; | |
5256 | ||
03cfb420 | 5257 | list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) |
7df302f7 CL |
5258 | stateid->ts_id_status = |
5259 | nfsd4_validate_stateid(cl, &stateid->ts_id_stateid); | |
03cfb420 | 5260 | |
17456804 BS |
5261 | return nfs_ok; |
5262 | } | |
5263 | ||
42691398 CL |
5264 | static __be32 |
5265 | nfsd4_free_lock_stateid(stateid_t *stateid, struct nfs4_stid *s) | |
5266 | { | |
5267 | struct nfs4_ol_stateid *stp = openlockstateid(s); | |
5268 | __be32 ret; | |
5269 | ||
659aefb6 TM |
5270 | ret = nfsd4_lock_ol_stateid(stp); |
5271 | if (ret) | |
5272 | goto out_put_stid; | |
42691398 CL |
5273 | |
5274 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); | |
5275 | if (ret) | |
5276 | goto out; | |
5277 | ||
5278 | ret = nfserr_locks_held; | |
5279 | if (check_for_locks(stp->st_stid.sc_file, | |
5280 | lockowner(stp->st_stateowner))) | |
5281 | goto out; | |
5282 | ||
5283 | release_lock_stateid(stp); | |
5284 | ret = nfs_ok; | |
5285 | ||
5286 | out: | |
5287 | mutex_unlock(&stp->st_mutex); | |
659aefb6 | 5288 | out_put_stid: |
42691398 CL |
5289 | nfs4_put_stid(s); |
5290 | return ret; | |
5291 | } | |
5292 | ||
e1ca12df BS |
5293 | __be32 |
5294 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
eb69853d | 5295 | union nfsd4_op_u *u) |
e1ca12df | 5296 | { |
eb69853d | 5297 | struct nfsd4_free_stateid *free_stateid = &u->free_stateid; |
e1ca12df | 5298 | stateid_t *stateid = &free_stateid->fr_stateid; |
2da1cec7 | 5299 | struct nfs4_stid *s; |
3bd64a5b | 5300 | struct nfs4_delegation *dp; |
38c2f4b1 | 5301 | struct nfs4_client *cl = cstate->session->se_client; |
2da1cec7 | 5302 | __be32 ret = nfserr_bad_stateid; |
e1ca12df | 5303 | |
1af71cc8 JL |
5304 | spin_lock(&cl->cl_lock); |
5305 | s = find_stateid_locked(cl, stateid); | |
2da1cec7 | 5306 | if (!s) |
1af71cc8 | 5307 | goto out_unlock; |
03da3169 | 5308 | spin_lock(&s->sc_lock); |
2da1cec7 BF |
5309 | switch (s->sc_type) { |
5310 | case NFS4_DELEG_STID: | |
e1ca12df | 5311 | ret = nfserr_locks_held; |
1af71cc8 | 5312 | break; |
2da1cec7 | 5313 | case NFS4_OPEN_STID: |
2da1cec7 BF |
5314 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); |
5315 | if (ret) | |
1af71cc8 JL |
5316 | break; |
5317 | ret = nfserr_locks_held; | |
f7a4d872 | 5318 | break; |
1af71cc8 | 5319 | case NFS4_LOCK_STID: |
03da3169 | 5320 | spin_unlock(&s->sc_lock); |
a15dfcd5 | 5321 | refcount_inc(&s->sc_count); |
1af71cc8 | 5322 | spin_unlock(&cl->cl_lock); |
42691398 | 5323 | ret = nfsd4_free_lock_stateid(stateid, s); |
1af71cc8 | 5324 | goto out; |
3bd64a5b | 5325 | case NFS4_REVOKED_DELEG_STID: |
03da3169 | 5326 | spin_unlock(&s->sc_lock); |
3bd64a5b | 5327 | dp = delegstateid(s); |
2d4a532d JL |
5328 | list_del_init(&dp->dl_recall_lru); |
5329 | spin_unlock(&cl->cl_lock); | |
6011695d | 5330 | nfs4_put_stid(s); |
3bd64a5b | 5331 | ret = nfs_ok; |
1af71cc8 JL |
5332 | goto out; |
5333 | /* Default falls through and returns nfserr_bad_stateid */ | |
e1ca12df | 5334 | } |
03da3169 | 5335 | spin_unlock(&s->sc_lock); |
1af71cc8 JL |
5336 | out_unlock: |
5337 | spin_unlock(&cl->cl_lock); | |
e1ca12df | 5338 | out: |
e1ca12df BS |
5339 | return ret; |
5340 | } | |
5341 | ||
4c4cd222 N |
5342 | static inline int |
5343 | setlkflg (int type) | |
5344 | { | |
5345 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
5346 | RD_STATE : WR_STATE; | |
5347 | } | |
1da177e4 | 5348 | |
dcef0413 | 5349 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
c0a5d93e BF |
5350 | { |
5351 | struct svc_fh *current_fh = &cstate->current_fh; | |
5352 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
5353 | __be32 status; | |
5354 | ||
c0a5d93e BF |
5355 | status = nfsd4_check_seqid(cstate, sop, seqid); |
5356 | if (status) | |
5357 | return status; | |
9271d7e5 TM |
5358 | status = nfsd4_lock_ol_stateid(stp); |
5359 | if (status != nfs_ok) | |
5360 | return status; | |
f7a4d872 | 5361 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); |
35a92fe8 JL |
5362 | if (status == nfs_ok) |
5363 | status = nfs4_check_fh(current_fh, &stp->st_stid); | |
5364 | if (status != nfs_ok) | |
feb9dad5 | 5365 | mutex_unlock(&stp->st_mutex); |
35a92fe8 | 5366 | return status; |
c0a5d93e BF |
5367 | } |
5368 | ||
1da177e4 LT |
5369 | /* |
5370 | * Checks for sequence id mutating operations. | |
5371 | */ | |
b37ad28b | 5372 | static __be32 |
dd453dfd | 5373 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2288d0e3 | 5374 | stateid_t *stateid, char typemask, |
3320fef1 SK |
5375 | struct nfs4_ol_stateid **stpp, |
5376 | struct nfsd_net *nn) | |
1da177e4 | 5377 | { |
0836f587 | 5378 | __be32 status; |
38c2f4b1 | 5379 | struct nfs4_stid *s; |
e17f99b7 | 5380 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 5381 | |
8c10cbdb BH |
5382 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
5383 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 5384 | |
1da177e4 | 5385 | *stpp = NULL; |
2dd6e458 | 5386 | status = nfsd4_lookup_stateid(cstate, stateid, typemask, &s, nn); |
c0a5d93e BF |
5387 | if (status) |
5388 | return status; | |
e17f99b7 | 5389 | stp = openlockstateid(s); |
58fb12e6 | 5390 | nfsd4_cstate_assign_replay(cstate, stp->st_stateowner); |
1da177e4 | 5391 | |
e17f99b7 | 5392 | status = nfs4_seqid_op_checks(cstate, stateid, seqid, stp); |
fd911011 | 5393 | if (!status) |
e17f99b7 | 5394 | *stpp = stp; |
fd911011 TM |
5395 | else |
5396 | nfs4_put_stid(&stp->st_stid); | |
e17f99b7 | 5397 | return status; |
c0a5d93e | 5398 | } |
39325bd0 | 5399 | |
3320fef1 SK |
5400 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
5401 | stateid_t *stateid, struct nfs4_ol_stateid **stpp, struct nfsd_net *nn) | |
c0a5d93e BF |
5402 | { |
5403 | __be32 status; | |
5404 | struct nfs4_openowner *oo; | |
4cbfc9f7 | 5405 | struct nfs4_ol_stateid *stp; |
1da177e4 | 5406 | |
c0a5d93e | 5407 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
4cbfc9f7 | 5408 | NFS4_OPEN_STID, &stp, nn); |
7a8711c9 BF |
5409 | if (status) |
5410 | return status; | |
4cbfc9f7 TM |
5411 | oo = openowner(stp->st_stateowner); |
5412 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { | |
feb9dad5 | 5413 | mutex_unlock(&stp->st_mutex); |
4cbfc9f7 | 5414 | nfs4_put_stid(&stp->st_stid); |
3a4f98bb | 5415 | return nfserr_bad_stateid; |
4cbfc9f7 TM |
5416 | } |
5417 | *stpp = stp; | |
3a4f98bb | 5418 | return nfs_ok; |
1da177e4 LT |
5419 | } |
5420 | ||
b37ad28b | 5421 | __be32 |
ca364317 | 5422 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 5423 | union nfsd4_op_u *u) |
1da177e4 | 5424 | { |
eb69853d | 5425 | struct nfsd4_open_confirm *oc = &u->open_confirm; |
b37ad28b | 5426 | __be32 status; |
fe0750e5 | 5427 | struct nfs4_openowner *oo; |
dcef0413 | 5428 | struct nfs4_ol_stateid *stp; |
3320fef1 | 5429 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 5430 | |
a6a9f18f AV |
5431 | dprintk("NFSD: nfsd4_open_confirm on file %pd\n", |
5432 | cstate->current_fh.fh_dentry); | |
1da177e4 | 5433 | |
ca364317 | 5434 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
5435 | if (status) |
5436 | return status; | |
1da177e4 | 5437 | |
9072d5c6 | 5438 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 5439 | oc->oc_seqid, &oc->oc_req_stateid, |
3320fef1 | 5440 | NFS4_OPEN_STID, &stp, nn); |
9072d5c6 | 5441 | if (status) |
68b66e82 | 5442 | goto out; |
fe0750e5 | 5443 | oo = openowner(stp->st_stateowner); |
68b66e82 | 5444 | status = nfserr_bad_stateid; |
35a92fe8 | 5445 | if (oo->oo_flags & NFS4_OO_CONFIRMED) { |
feb9dad5 | 5446 | mutex_unlock(&stp->st_mutex); |
2585fc79 | 5447 | goto put_stateid; |
35a92fe8 | 5448 | } |
dad1c067 | 5449 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
9767feb2 | 5450 | nfs4_inc_and_copy_stateid(&oc->oc_resp_stateid, &stp->st_stid); |
feb9dad5 | 5451 | mutex_unlock(&stp->st_mutex); |
8c10cbdb | 5452 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
dcef0413 | 5453 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); |
c7b9a459 | 5454 | |
2a4317c5 | 5455 | nfsd4_client_record_create(oo->oo_owner.so_client); |
68b66e82 | 5456 | status = nfs_ok; |
2585fc79 TM |
5457 | put_stateid: |
5458 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 5459 | out: |
9411b1d4 | 5460 | nfsd4_bump_seqid(cstate, status); |
1da177e4 LT |
5461 | return status; |
5462 | } | |
5463 | ||
6409a5a6 | 5464 | static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) |
1da177e4 | 5465 | { |
82c5ff1b | 5466 | if (!test_access(access, stp)) |
6409a5a6 | 5467 | return; |
11b9164a | 5468 | nfs4_file_put_access(stp->st_stid.sc_file, access); |
82c5ff1b | 5469 | clear_access(access, stp); |
6409a5a6 | 5470 | } |
f197c271 | 5471 | |
6409a5a6 BF |
5472 | static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) |
5473 | { | |
5474 | switch (to_access) { | |
5475 | case NFS4_SHARE_ACCESS_READ: | |
5476 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); | |
5477 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
5478 | break; | |
5479 | case NFS4_SHARE_ACCESS_WRITE: | |
5480 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); | |
5481 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
5482 | break; | |
5483 | case NFS4_SHARE_ACCESS_BOTH: | |
5484 | break; | |
5485 | default: | |
063b0fb9 | 5486 | WARN_ON_ONCE(1); |
1da177e4 LT |
5487 | } |
5488 | } | |
5489 | ||
b37ad28b | 5490 | __be32 |
ca364317 | 5491 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
eb69853d | 5492 | struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) |
1da177e4 | 5493 | { |
eb69853d | 5494 | struct nfsd4_open_downgrade *od = &u->open_downgrade; |
b37ad28b | 5495 | __be32 status; |
dcef0413 | 5496 | struct nfs4_ol_stateid *stp; |
3320fef1 | 5497 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 5498 | |
a6a9f18f AV |
5499 | dprintk("NFSD: nfsd4_open_downgrade on file %pd\n", |
5500 | cstate->current_fh.fh_dentry); | |
1da177e4 | 5501 | |
c30e92df | 5502 | /* We don't yet support WANT bits: */ |
2c8bd7e0 BH |
5503 | if (od->od_deleg_want) |
5504 | dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, | |
5505 | od->od_deleg_want); | |
1da177e4 | 5506 | |
c0a5d93e | 5507 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
3320fef1 | 5508 | &od->od_stateid, &stp, nn); |
9072d5c6 | 5509 | if (status) |
1da177e4 | 5510 | goto out; |
1da177e4 | 5511 | status = nfserr_inval; |
82c5ff1b | 5512 | if (!test_access(od->od_share_access, stp)) { |
c11c591f | 5513 | dprintk("NFSD: access not a subset of current bitmap: 0x%hhx, input access=%08x\n", |
1da177e4 | 5514 | stp->st_access_bmap, od->od_share_access); |
0667b1e9 | 5515 | goto put_stateid; |
1da177e4 | 5516 | } |
ce0fc43c | 5517 | if (!test_deny(od->od_share_deny, stp)) { |
c11c591f | 5518 | dprintk("NFSD: deny not a subset of current bitmap: 0x%hhx, input deny=%08x\n", |
1da177e4 | 5519 | stp->st_deny_bmap, od->od_share_deny); |
0667b1e9 | 5520 | goto put_stateid; |
1da177e4 | 5521 | } |
6409a5a6 | 5522 | nfs4_stateid_downgrade(stp, od->od_share_access); |
ce0fc43c | 5523 | reset_union_bmap_deny(od->od_share_deny, stp); |
9767feb2 | 5524 | nfs4_inc_and_copy_stateid(&od->od_stateid, &stp->st_stid); |
1da177e4 | 5525 | status = nfs_ok; |
0667b1e9 | 5526 | put_stateid: |
feb9dad5 | 5527 | mutex_unlock(&stp->st_mutex); |
0667b1e9 | 5528 | nfs4_put_stid(&stp->st_stid); |
1da177e4 | 5529 | out: |
9411b1d4 | 5530 | nfsd4_bump_seqid(cstate, status); |
1da177e4 LT |
5531 | return status; |
5532 | } | |
5533 | ||
f7a4d872 BF |
5534 | static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) |
5535 | { | |
acf9295b | 5536 | struct nfs4_client *clp = s->st_stid.sc_client; |
e8568739 | 5537 | bool unhashed; |
d83017f9 | 5538 | LIST_HEAD(reaplist); |
acf9295b | 5539 | |
2c41beb0 | 5540 | spin_lock(&clp->cl_lock); |
e8568739 | 5541 | unhashed = unhash_open_stateid(s, &reaplist); |
acf9295b | 5542 | |
d83017f9 | 5543 | if (clp->cl_minorversion) { |
e8568739 JL |
5544 | if (unhashed) |
5545 | put_ol_stateid_locked(s, &reaplist); | |
d83017f9 JL |
5546 | spin_unlock(&clp->cl_lock); |
5547 | free_ol_stateid_reaplist(&reaplist); | |
5548 | } else { | |
5549 | spin_unlock(&clp->cl_lock); | |
5550 | free_ol_stateid_reaplist(&reaplist); | |
e8568739 JL |
5551 | if (unhashed) |
5552 | move_to_close_lru(s, clp->net); | |
d83017f9 | 5553 | } |
38c387b5 BF |
5554 | } |
5555 | ||
1da177e4 LT |
5556 | /* |
5557 | * nfs4_unlock_state() called after encode | |
5558 | */ | |
b37ad28b | 5559 | __be32 |
ca364317 | 5560 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 5561 | union nfsd4_op_u *u) |
1da177e4 | 5562 | { |
eb69853d | 5563 | struct nfsd4_close *close = &u->close; |
b37ad28b | 5564 | __be32 status; |
dcef0413 | 5565 | struct nfs4_ol_stateid *stp; |
3320fef1 SK |
5566 | struct net *net = SVC_NET(rqstp); |
5567 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 | 5568 | |
a6a9f18f AV |
5569 | dprintk("NFSD: nfsd4_close on file %pd\n", |
5570 | cstate->current_fh.fh_dentry); | |
1da177e4 | 5571 | |
f7a4d872 BF |
5572 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
5573 | &close->cl_stateid, | |
5574 | NFS4_OPEN_STID|NFS4_CLOSED_STID, | |
3320fef1 | 5575 | &stp, nn); |
9411b1d4 | 5576 | nfsd4_bump_seqid(cstate, status); |
9072d5c6 | 5577 | if (status) |
1da177e4 | 5578 | goto out; |
15ca08d3 TM |
5579 | |
5580 | stp->st_stid.sc_type = NFS4_CLOSED_STID; | |
bd2decac JL |
5581 | |
5582 | /* | |
5583 | * Technically we don't _really_ have to increment or copy it, since | |
5584 | * it should just be gone after this operation and we clobber the | |
5585 | * copied value below, but we continue to do so here just to ensure | |
5586 | * that racing ops see that there was a state change. | |
5587 | */ | |
9767feb2 | 5588 | nfs4_inc_and_copy_stateid(&close->cl_stateid, &stp->st_stid); |
1da177e4 | 5589 | |
f7a4d872 | 5590 | nfsd4_close_open_stateid(stp); |
15ca08d3 | 5591 | mutex_unlock(&stp->st_mutex); |
8a0b589d | 5592 | |
bd2decac JL |
5593 | /* v4.1+ suggests that we send a special stateid in here, since the |
5594 | * clients should just ignore this anyway. Since this is not useful | |
5595 | * for v4.0 clients either, we set it to the special close_stateid | |
5596 | * universally. | |
5597 | * | |
5598 | * See RFC5661 section 18.2.4, and RFC7530 section 16.2.5 | |
5599 | */ | |
5600 | memcpy(&close->cl_stateid, &close_stateid, sizeof(close->cl_stateid)); | |
fb500a7c | 5601 | |
8a0b589d TM |
5602 | /* put reference from nfs4_preprocess_seqid_op */ |
5603 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 5604 | out: |
1da177e4 LT |
5605 | return status; |
5606 | } | |
5607 | ||
b37ad28b | 5608 | __be32 |
ca364317 | 5609 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 5610 | union nfsd4_op_u *u) |
1da177e4 | 5611 | { |
eb69853d | 5612 | struct nfsd4_delegreturn *dr = &u->delegreturn; |
203a8c8e BF |
5613 | struct nfs4_delegation *dp; |
5614 | stateid_t *stateid = &dr->dr_stateid; | |
38c2f4b1 | 5615 | struct nfs4_stid *s; |
b37ad28b | 5616 | __be32 status; |
3320fef1 | 5617 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 5618 | |
ca364317 | 5619 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e | 5620 | return status; |
1da177e4 | 5621 | |
2dd6e458 | 5622 | status = nfsd4_lookup_stateid(cstate, stateid, NFS4_DELEG_STID, &s, nn); |
38c2f4b1 | 5623 | if (status) |
203a8c8e | 5624 | goto out; |
38c2f4b1 | 5625 | dp = delegstateid(s); |
03da3169 | 5626 | status = nfsd4_stid_check_stateid_generation(stateid, &dp->dl_stid, nfsd4_has_session(cstate)); |
203a8c8e | 5627 | if (status) |
fd911011 | 5628 | goto put_stateid; |
203a8c8e | 5629 | |
3bd64a5b | 5630 | destroy_delegation(dp); |
fd911011 TM |
5631 | put_stateid: |
5632 | nfs4_put_stid(&dp->dl_stid); | |
1da177e4 LT |
5633 | out: |
5634 | return status; | |
5635 | } | |
5636 | ||
87df4de8 BH |
5637 | static inline u64 |
5638 | end_offset(u64 start, u64 len) | |
5639 | { | |
5640 | u64 end; | |
5641 | ||
5642 | end = start + len; | |
5643 | return end >= start ? end: NFS4_MAX_UINT64; | |
5644 | } | |
5645 | ||
5646 | /* last octet in a range */ | |
5647 | static inline u64 | |
5648 | last_byte_offset(u64 start, u64 len) | |
5649 | { | |
5650 | u64 end; | |
5651 | ||
063b0fb9 | 5652 | WARN_ON_ONCE(!len); |
87df4de8 BH |
5653 | end = start + len; |
5654 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
5655 | } | |
5656 | ||
1da177e4 LT |
5657 | /* |
5658 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
5659 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
5660 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
5661 | * locking, this prevents us from being completely protocol-compliant. The | |
5662 | * real solution to this problem is to start using unsigned file offsets in | |
5663 | * the VFS, but this is a very deep change! | |
5664 | */ | |
5665 | static inline void | |
5666 | nfs4_transform_lock_offset(struct file_lock *lock) | |
5667 | { | |
5668 | if (lock->fl_start < 0) | |
5669 | lock->fl_start = OFFSET_MAX; | |
5670 | if (lock->fl_end < 0) | |
5671 | lock->fl_end = OFFSET_MAX; | |
5672 | } | |
5673 | ||
cae80b30 JL |
5674 | static fl_owner_t |
5675 | nfsd4_fl_get_owner(fl_owner_t owner) | |
aef9583b | 5676 | { |
cae80b30 JL |
5677 | struct nfs4_lockowner *lo = (struct nfs4_lockowner *)owner; |
5678 | ||
5679 | nfs4_get_stateowner(&lo->lo_owner); | |
5680 | return owner; | |
aef9583b KM |
5681 | } |
5682 | ||
cae80b30 JL |
5683 | static void |
5684 | nfsd4_fl_put_owner(fl_owner_t owner) | |
aef9583b | 5685 | { |
cae80b30 | 5686 | struct nfs4_lockowner *lo = (struct nfs4_lockowner *)owner; |
aef9583b | 5687 | |
cae80b30 | 5688 | if (lo) |
aef9583b | 5689 | nfs4_put_stateowner(&lo->lo_owner); |
aef9583b KM |
5690 | } |
5691 | ||
76d348fa JL |
5692 | static void |
5693 | nfsd4_lm_notify(struct file_lock *fl) | |
5694 | { | |
5695 | struct nfs4_lockowner *lo = (struct nfs4_lockowner *)fl->fl_owner; | |
5696 | struct net *net = lo->lo_owner.so_client->net; | |
5697 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
5698 | struct nfsd4_blocked_lock *nbl = container_of(fl, | |
5699 | struct nfsd4_blocked_lock, nbl_lock); | |
5700 | bool queue = false; | |
5701 | ||
7919d0a2 | 5702 | /* An empty list means that something else is going to be using it */ |
0cc11a61 | 5703 | spin_lock(&nn->blocked_locks_lock); |
76d348fa JL |
5704 | if (!list_empty(&nbl->nbl_list)) { |
5705 | list_del_init(&nbl->nbl_list); | |
7919d0a2 | 5706 | list_del_init(&nbl->nbl_lru); |
76d348fa JL |
5707 | queue = true; |
5708 | } | |
0cc11a61 | 5709 | spin_unlock(&nn->blocked_locks_lock); |
76d348fa JL |
5710 | |
5711 | if (queue) | |
5712 | nfsd4_run_cb(&nbl->nbl_cb); | |
5713 | } | |
5714 | ||
7b021967 | 5715 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
76d348fa | 5716 | .lm_notify = nfsd4_lm_notify, |
aef9583b KM |
5717 | .lm_get_owner = nfsd4_fl_get_owner, |
5718 | .lm_put_owner = nfsd4_fl_put_owner, | |
d5b9026a | 5719 | }; |
1da177e4 LT |
5720 | |
5721 | static inline void | |
5722 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
5723 | { | |
fe0750e5 | 5724 | struct nfs4_lockowner *lo; |
1da177e4 | 5725 | |
d5b9026a | 5726 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 BF |
5727 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
5728 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, | |
5729 | lo->lo_owner.so_owner.len, GFP_KERNEL); | |
7c13f344 BF |
5730 | if (!deny->ld_owner.data) |
5731 | /* We just don't care that much */ | |
5732 | goto nevermind; | |
fe0750e5 BF |
5733 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
5734 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; | |
d5b9026a | 5735 | } else { |
7c13f344 BF |
5736 | nevermind: |
5737 | deny->ld_owner.len = 0; | |
5738 | deny->ld_owner.data = NULL; | |
d5b9026a N |
5739 | deny->ld_clientid.cl_boot = 0; |
5740 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
5741 | } |
5742 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
5743 | deny->ld_length = NFS4_MAX_UINT64; |
5744 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
5745 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
5746 | deny->ld_type = NFS4_READ_LT; | |
5747 | if (fl->fl_type != F_RDLCK) | |
5748 | deny->ld_type = NFS4_WRITE_LT; | |
5749 | } | |
5750 | ||
fe0750e5 | 5751 | static struct nfs4_lockowner * |
c8623999 | 5752 | find_lockowner_str_locked(struct nfs4_client *clp, struct xdr_netobj *owner) |
1da177e4 | 5753 | { |
d4f0489f | 5754 | unsigned int strhashval = ownerstr_hashval(owner); |
b3c32bcd | 5755 | struct nfs4_stateowner *so; |
1da177e4 | 5756 | |
0a880a28 TM |
5757 | lockdep_assert_held(&clp->cl_lock); |
5758 | ||
d4f0489f TM |
5759 | list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[strhashval], |
5760 | so_strhash) { | |
b3c32bcd TM |
5761 | if (so->so_is_open_owner) |
5762 | continue; | |
b5971afa KM |
5763 | if (same_owner_str(so, owner)) |
5764 | return lockowner(nfs4_get_stateowner(so)); | |
1da177e4 LT |
5765 | } |
5766 | return NULL; | |
5767 | } | |
5768 | ||
c58c6610 | 5769 | static struct nfs4_lockowner * |
c8623999 | 5770 | find_lockowner_str(struct nfs4_client *clp, struct xdr_netobj *owner) |
c58c6610 TM |
5771 | { |
5772 | struct nfs4_lockowner *lo; | |
5773 | ||
d4f0489f | 5774 | spin_lock(&clp->cl_lock); |
c8623999 | 5775 | lo = find_lockowner_str_locked(clp, owner); |
d4f0489f | 5776 | spin_unlock(&clp->cl_lock); |
c58c6610 TM |
5777 | return lo; |
5778 | } | |
5779 | ||
8f4b54c5 JL |
5780 | static void nfs4_unhash_lockowner(struct nfs4_stateowner *sop) |
5781 | { | |
c58c6610 | 5782 | unhash_lockowner_locked(lockowner(sop)); |
8f4b54c5 JL |
5783 | } |
5784 | ||
6b180f0b JL |
5785 | static void nfs4_free_lockowner(struct nfs4_stateowner *sop) |
5786 | { | |
5787 | struct nfs4_lockowner *lo = lockowner(sop); | |
5788 | ||
5789 | kmem_cache_free(lockowner_slab, lo); | |
5790 | } | |
5791 | ||
5792 | static const struct nfs4_stateowner_operations lockowner_ops = { | |
8f4b54c5 JL |
5793 | .so_unhash = nfs4_unhash_lockowner, |
5794 | .so_free = nfs4_free_lockowner, | |
6b180f0b JL |
5795 | }; |
5796 | ||
1da177e4 LT |
5797 | /* |
5798 | * Alloc a lock owner structure. | |
5799 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 5800 | * occurred. |
1da177e4 | 5801 | * |
16bfdaaf | 5802 | * strhashval = ownerstr_hashval |
1da177e4 | 5803 | */ |
fe0750e5 | 5804 | static struct nfs4_lockowner * |
c58c6610 TM |
5805 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, |
5806 | struct nfs4_ol_stateid *open_stp, | |
5807 | struct nfsd4_lock *lock) | |
5808 | { | |
c58c6610 | 5809 | struct nfs4_lockowner *lo, *ret; |
1da177e4 | 5810 | |
fe0750e5 BF |
5811 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
5812 | if (!lo) | |
1da177e4 | 5813 | return NULL; |
76d348fa | 5814 | INIT_LIST_HEAD(&lo->lo_blocked); |
fe0750e5 BF |
5815 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
5816 | lo->lo_owner.so_is_open_owner = 0; | |
5db1c03f | 5817 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid; |
6b180f0b | 5818 | lo->lo_owner.so_ops = &lockowner_ops; |
d4f0489f | 5819 | spin_lock(&clp->cl_lock); |
c8623999 | 5820 | ret = find_lockowner_str_locked(clp, &lock->lk_new_owner); |
c58c6610 TM |
5821 | if (ret == NULL) { |
5822 | list_add(&lo->lo_owner.so_strhash, | |
d4f0489f | 5823 | &clp->cl_ownerstr_hashtbl[strhashval]); |
c58c6610 TM |
5824 | ret = lo; |
5825 | } else | |
d50ffded KM |
5826 | nfs4_free_stateowner(&lo->lo_owner); |
5827 | ||
d4f0489f | 5828 | spin_unlock(&clp->cl_lock); |
340f0ba1 | 5829 | return ret; |
1da177e4 LT |
5830 | } |
5831 | ||
fd1fd685 TM |
5832 | static struct nfs4_ol_stateid * |
5833 | find_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp) | |
5834 | { | |
5835 | struct nfs4_ol_stateid *lst; | |
5836 | struct nfs4_client *clp = lo->lo_owner.so_client; | |
5837 | ||
5838 | lockdep_assert_held(&clp->cl_lock); | |
5839 | ||
5840 | list_for_each_entry(lst, &lo->lo_owner.so_stateids, st_perstateowner) { | |
5841 | if (lst->st_stid.sc_type != NFS4_LOCK_STID) | |
5842 | continue; | |
5843 | if (lst->st_stid.sc_file == fp) { | |
5844 | refcount_inc(&lst->st_stid.sc_count); | |
5845 | return lst; | |
5846 | } | |
5847 | } | |
5848 | return NULL; | |
5849 | } | |
5850 | ||
beeca19c | 5851 | static struct nfs4_ol_stateid * |
356a95ec JL |
5852 | init_lock_stateid(struct nfs4_ol_stateid *stp, struct nfs4_lockowner *lo, |
5853 | struct nfs4_file *fp, struct inode *inode, | |
5854 | struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 5855 | { |
d3b313a4 | 5856 | struct nfs4_client *clp = lo->lo_owner.so_client; |
beeca19c | 5857 | struct nfs4_ol_stateid *retstp; |
1da177e4 | 5858 | |
beeca19c | 5859 | mutex_init(&stp->st_mutex); |
4f34bd05 | 5860 | mutex_lock_nested(&stp->st_mutex, OPEN_STATEID_MUTEX); |
beeca19c TM |
5861 | retry: |
5862 | spin_lock(&clp->cl_lock); | |
5863 | spin_lock(&fp->fi_lock); | |
5864 | retstp = find_lock_stateid(lo, fp); | |
5865 | if (retstp) | |
5866 | goto out_unlock; | |
356a95ec | 5867 | |
a15dfcd5 | 5868 | refcount_inc(&stp->st_stid.sc_count); |
3abdb607 | 5869 | stp->st_stid.sc_type = NFS4_LOCK_STID; |
b5971afa | 5870 | stp->st_stateowner = nfs4_get_stateowner(&lo->lo_owner); |
13cd2184 | 5871 | get_nfs4_file(fp); |
11b9164a | 5872 | stp->st_stid.sc_file = fp; |
0997b173 | 5873 | stp->st_access_bmap = 0; |
1da177e4 | 5874 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 5875 | stp->st_openstp = open_stp; |
3c87b9b7 | 5876 | list_add(&stp->st_locks, &open_stp->st_locks); |
1c755dc1 | 5877 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
1d31a253 | 5878 | list_add(&stp->st_perfile, &fp->fi_stateids); |
beeca19c | 5879 | out_unlock: |
1d31a253 | 5880 | spin_unlock(&fp->fi_lock); |
beeca19c TM |
5881 | spin_unlock(&clp->cl_lock); |
5882 | if (retstp) { | |
5883 | if (nfsd4_lock_ol_stateid(retstp) != nfs_ok) { | |
5884 | nfs4_put_stid(&retstp->st_stid); | |
5885 | goto retry; | |
5886 | } | |
5887 | /* To keep mutex tracking happy */ | |
5888 | mutex_unlock(&stp->st_mutex); | |
5889 | stp = retstp; | |
5890 | } | |
5891 | return stp; | |
1da177e4 LT |
5892 | } |
5893 | ||
356a95ec JL |
5894 | static struct nfs4_ol_stateid * |
5895 | find_or_create_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fi, | |
5896 | struct inode *inode, struct nfs4_ol_stateid *ost, | |
5897 | bool *new) | |
5898 | { | |
5899 | struct nfs4_stid *ns = NULL; | |
5900 | struct nfs4_ol_stateid *lst; | |
5901 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); | |
5902 | struct nfs4_client *clp = oo->oo_owner.so_client; | |
5903 | ||
beeca19c | 5904 | *new = false; |
356a95ec JL |
5905 | spin_lock(&clp->cl_lock); |
5906 | lst = find_lock_stateid(lo, fi); | |
356a95ec | 5907 | spin_unlock(&clp->cl_lock); |
beeca19c TM |
5908 | if (lst != NULL) { |
5909 | if (nfsd4_lock_ol_stateid(lst) == nfs_ok) | |
5910 | goto out; | |
5911 | nfs4_put_stid(&lst->st_stid); | |
5912 | } | |
5913 | ns = nfs4_alloc_stid(clp, stateid_slab, nfs4_free_lock_stateid); | |
5914 | if (ns == NULL) | |
5915 | return NULL; | |
5916 | ||
5917 | lst = init_lock_stateid(openlockstateid(ns), lo, fi, inode, ost); | |
5918 | if (lst == openlockstateid(ns)) | |
5919 | *new = true; | |
5920 | else | |
356a95ec | 5921 | nfs4_put_stid(ns); |
beeca19c | 5922 | out: |
356a95ec JL |
5923 | return lst; |
5924 | } | |
c53530da | 5925 | |
fd39ca9a | 5926 | static int |
1da177e4 LT |
5927 | check_lock_length(u64 offset, u64 length) |
5928 | { | |
e7969315 KM |
5929 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
5930 | (length > ~offset))); | |
1da177e4 LT |
5931 | } |
5932 | ||
dcef0413 | 5933 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 | 5934 | { |
11b9164a | 5935 | struct nfs4_file *fp = lock_stp->st_stid.sc_file; |
0997b173 | 5936 | |
7214e860 JL |
5937 | lockdep_assert_held(&fp->fi_lock); |
5938 | ||
82c5ff1b | 5939 | if (test_access(access, lock_stp)) |
0997b173 | 5940 | return; |
12659651 | 5941 | __nfs4_file_get_access(fp, access); |
82c5ff1b | 5942 | set_access(access, lock_stp); |
0997b173 BF |
5943 | } |
5944 | ||
356a95ec JL |
5945 | static __be32 |
5946 | lookup_or_create_lock_state(struct nfsd4_compound_state *cstate, | |
5947 | struct nfs4_ol_stateid *ost, | |
5948 | struct nfsd4_lock *lock, | |
dd257933 | 5949 | struct nfs4_ol_stateid **plst, bool *new) |
64a284d0 | 5950 | { |
5db1c03f | 5951 | __be32 status; |
11b9164a | 5952 | struct nfs4_file *fi = ost->st_stid.sc_file; |
64a284d0 BF |
5953 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); |
5954 | struct nfs4_client *cl = oo->oo_owner.so_client; | |
2b0143b5 | 5955 | struct inode *inode = d_inode(cstate->current_fh.fh_dentry); |
64a284d0 | 5956 | struct nfs4_lockowner *lo; |
dd257933 | 5957 | struct nfs4_ol_stateid *lst; |
64a284d0 BF |
5958 | unsigned int strhashval; |
5959 | ||
c8623999 | 5960 | lo = find_lockowner_str(cl, &lock->lk_new_owner); |
c53530da | 5961 | if (!lo) { |
76f6c9e1 | 5962 | strhashval = ownerstr_hashval(&lock->lk_new_owner); |
c53530da JL |
5963 | lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); |
5964 | if (lo == NULL) | |
5965 | return nfserr_jukebox; | |
5966 | } else { | |
5967 | /* with an existing lockowner, seqids must be the same */ | |
5db1c03f | 5968 | status = nfserr_bad_seqid; |
c53530da JL |
5969 | if (!cstate->minorversion && |
5970 | lock->lk_new_lock_seqid != lo->lo_owner.so_seqid) | |
5db1c03f | 5971 | goto out; |
64a284d0 | 5972 | } |
c53530da | 5973 | |
dd257933 JL |
5974 | lst = find_or_create_lock_stateid(lo, fi, inode, ost, new); |
5975 | if (lst == NULL) { | |
5db1c03f JL |
5976 | status = nfserr_jukebox; |
5977 | goto out; | |
64a284d0 | 5978 | } |
dd257933 | 5979 | |
5db1c03f | 5980 | status = nfs_ok; |
dd257933 | 5981 | *plst = lst; |
5db1c03f JL |
5982 | out: |
5983 | nfs4_put_stateowner(&lo->lo_owner); | |
5984 | return status; | |
64a284d0 BF |
5985 | } |
5986 | ||
1da177e4 LT |
5987 | /* |
5988 | * LOCK operation | |
5989 | */ | |
b37ad28b | 5990 | __be32 |
ca364317 | 5991 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 5992 | union nfsd4_op_u *u) |
1da177e4 | 5993 | { |
eb69853d | 5994 | struct nfsd4_lock *lock = &u->lock; |
fe0750e5 BF |
5995 | struct nfs4_openowner *open_sop = NULL; |
5996 | struct nfs4_lockowner *lock_sop = NULL; | |
3d0fabd5 | 5997 | struct nfs4_ol_stateid *lock_stp = NULL; |
0667b1e9 | 5998 | struct nfs4_ol_stateid *open_stp = NULL; |
7214e860 | 5999 | struct nfs4_file *fp; |
7d947842 | 6000 | struct file *filp = NULL; |
76d348fa | 6001 | struct nfsd4_blocked_lock *nbl = NULL; |
21179d81 JL |
6002 | struct file_lock *file_lock = NULL; |
6003 | struct file_lock *conflock = NULL; | |
b37ad28b | 6004 | __be32 status = 0; |
b34f27aa | 6005 | int lkflg; |
b8dd7b9a | 6006 | int err; |
5db1c03f | 6007 | bool new = false; |
76d348fa JL |
6008 | unsigned char fl_type; |
6009 | unsigned int fl_flags = FL_POSIX; | |
3320fef1 SK |
6010 | struct net *net = SVC_NET(rqstp); |
6011 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 LT |
6012 | |
6013 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
6014 | (long long) lock->lk_offset, | |
6015 | (long long) lock->lk_length); | |
6016 | ||
1da177e4 LT |
6017 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
6018 | return nfserr_inval; | |
6019 | ||
ca364317 | 6020 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 6021 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
6022 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
6023 | return status; | |
6024 | } | |
6025 | ||
1da177e4 | 6026 | if (lock->lk_is_new) { |
684e5638 BF |
6027 | if (nfsd4_has_session(cstate)) |
6028 | /* See rfc 5661 18.10.3: given clientid is ignored: */ | |
76f6c9e1 | 6029 | memcpy(&lock->lk_new_clientid, |
684e5638 BF |
6030 | &cstate->session->se_client->cl_clientid, |
6031 | sizeof(clientid_t)); | |
6032 | ||
1da177e4 | 6033 | status = nfserr_stale_clientid; |
2c142baa | 6034 | if (STALE_CLIENTID(&lock->lk_new_clientid, nn)) |
1da177e4 | 6035 | goto out; |
1da177e4 | 6036 | |
1da177e4 | 6037 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 6038 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
6039 | lock->lk_new_open_seqid, |
6040 | &lock->lk_new_open_stateid, | |
3320fef1 | 6041 | &open_stp, nn); |
37515177 | 6042 | if (status) |
1da177e4 | 6043 | goto out; |
feb9dad5 | 6044 | mutex_unlock(&open_stp->st_mutex); |
fe0750e5 | 6045 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 6046 | status = nfserr_bad_stateid; |
684e5638 | 6047 | if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
76f6c9e1 | 6048 | &lock->lk_new_clientid)) |
b34f27aa | 6049 | goto out; |
64a284d0 | 6050 | status = lookup_or_create_lock_state(cstate, open_stp, lock, |
5db1c03f | 6051 | &lock_stp, &new); |
3d0fabd5 | 6052 | } else { |
dd453dfd | 6053 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
6054 | lock->lk_old_lock_seqid, |
6055 | &lock->lk_old_lock_stateid, | |
3320fef1 | 6056 | NFS4_LOCK_STID, &lock_stp, nn); |
3d0fabd5 | 6057 | } |
e1aaa891 BF |
6058 | if (status) |
6059 | goto out; | |
64a284d0 | 6060 | lock_sop = lockowner(lock_stp->st_stateowner); |
1da177e4 | 6061 | |
b34f27aa BF |
6062 | lkflg = setlkflg(lock->lk_type); |
6063 | status = nfs4_check_openmode(lock_stp, lkflg); | |
6064 | if (status) | |
6065 | goto out; | |
6066 | ||
0dd395dc | 6067 | status = nfserr_grace; |
3320fef1 | 6068 | if (locks_in_grace(net) && !lock->lk_reclaim) |
0dd395dc N |
6069 | goto out; |
6070 | status = nfserr_no_grace; | |
3320fef1 | 6071 | if (!locks_in_grace(net) && lock->lk_reclaim) |
0dd395dc N |
6072 | goto out; |
6073 | ||
11b9164a | 6074 | fp = lock_stp->st_stid.sc_file; |
1da177e4 | 6075 | switch (lock->lk_type) { |
1da177e4 | 6076 | case NFS4_READW_LT: |
76d348fa JL |
6077 | if (nfsd4_has_session(cstate)) |
6078 | fl_flags |= FL_SLEEP; | |
6079 | /* Fallthrough */ | |
6080 | case NFS4_READ_LT: | |
7214e860 JL |
6081 | spin_lock(&fp->fi_lock); |
6082 | filp = find_readable_file_locked(fp); | |
0997b173 BF |
6083 | if (filp) |
6084 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
7214e860 | 6085 | spin_unlock(&fp->fi_lock); |
76d348fa | 6086 | fl_type = F_RDLCK; |
529d7b2a | 6087 | break; |
1da177e4 | 6088 | case NFS4_WRITEW_LT: |
76d348fa JL |
6089 | if (nfsd4_has_session(cstate)) |
6090 | fl_flags |= FL_SLEEP; | |
6091 | /* Fallthrough */ | |
6092 | case NFS4_WRITE_LT: | |
7214e860 JL |
6093 | spin_lock(&fp->fi_lock); |
6094 | filp = find_writeable_file_locked(fp); | |
0997b173 BF |
6095 | if (filp) |
6096 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
7214e860 | 6097 | spin_unlock(&fp->fi_lock); |
76d348fa | 6098 | fl_type = F_WRLCK; |
529d7b2a | 6099 | break; |
1da177e4 LT |
6100 | default: |
6101 | status = nfserr_inval; | |
6102 | goto out; | |
6103 | } | |
76d348fa | 6104 | |
f9d7562f BF |
6105 | if (!filp) { |
6106 | status = nfserr_openmode; | |
6107 | goto out; | |
6108 | } | |
aef9583b | 6109 | |
76d348fa JL |
6110 | nbl = find_or_allocate_block(lock_sop, &fp->fi_fhandle, nn); |
6111 | if (!nbl) { | |
6112 | dprintk("NFSD: %s: unable to allocate block!\n", __func__); | |
6113 | status = nfserr_jukebox; | |
6114 | goto out; | |
6115 | } | |
6116 | ||
6117 | file_lock = &nbl->nbl_lock; | |
6118 | file_lock->fl_type = fl_type; | |
aef9583b | 6119 | file_lock->fl_owner = (fl_owner_t)lockowner(nfs4_get_stateowner(&lock_sop->lo_owner)); |
21179d81 JL |
6120 | file_lock->fl_pid = current->tgid; |
6121 | file_lock->fl_file = filp; | |
76d348fa | 6122 | file_lock->fl_flags = fl_flags; |
21179d81 JL |
6123 | file_lock->fl_lmops = &nfsd_posix_mng_ops; |
6124 | file_lock->fl_start = lock->lk_offset; | |
6125 | file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); | |
6126 | nfs4_transform_lock_offset(file_lock); | |
6127 | ||
6128 | conflock = locks_alloc_lock(); | |
6129 | if (!conflock) { | |
6130 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
6131 | status = nfserr_jukebox; | |
6132 | goto out; | |
6133 | } | |
1da177e4 | 6134 | |
76d348fa | 6135 | if (fl_flags & FL_SLEEP) { |
7919d0a2 | 6136 | nbl->nbl_time = jiffies; |
0cc11a61 | 6137 | spin_lock(&nn->blocked_locks_lock); |
76d348fa | 6138 | list_add_tail(&nbl->nbl_list, &lock_sop->lo_blocked); |
7919d0a2 | 6139 | list_add_tail(&nbl->nbl_lru, &nn->blocked_locks_lru); |
0cc11a61 | 6140 | spin_unlock(&nn->blocked_locks_lock); |
76d348fa JL |
6141 | } |
6142 | ||
21179d81 | 6143 | err = vfs_lock_file(filp, F_SETLK, file_lock, conflock); |
76d348fa | 6144 | switch (err) { |
1da177e4 | 6145 | case 0: /* success! */ |
9767feb2 | 6146 | nfs4_inc_and_copy_stateid(&lock->lk_resp_stateid, &lock_stp->st_stid); |
b8dd7b9a | 6147 | status = 0; |
03f318ca BF |
6148 | if (lock->lk_reclaim) |
6149 | nn->somebody_reclaimed = true; | |
eb76b3fd | 6150 | break; |
76d348fa JL |
6151 | case FILE_LOCK_DEFERRED: |
6152 | nbl = NULL; | |
6153 | /* Fallthrough */ | |
6154 | case -EAGAIN: /* conflock holds conflicting lock */ | |
eb76b3fd AA |
6155 | status = nfserr_denied; |
6156 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
21179d81 | 6157 | nfs4_set_lock_denied(conflock, &lock->lk_denied); |
eb76b3fd | 6158 | break; |
76d348fa | 6159 | case -EDEADLK: |
1da177e4 | 6160 | status = nfserr_deadlock; |
eb76b3fd | 6161 | break; |
3e772463 | 6162 | default: |
fd85b817 | 6163 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 6164 | status = nfserrno(err); |
eb76b3fd | 6165 | break; |
1da177e4 | 6166 | } |
1da177e4 | 6167 | out: |
76d348fa JL |
6168 | if (nbl) { |
6169 | /* dequeue it if we queued it before */ | |
6170 | if (fl_flags & FL_SLEEP) { | |
0cc11a61 | 6171 | spin_lock(&nn->blocked_locks_lock); |
76d348fa | 6172 | list_del_init(&nbl->nbl_list); |
7919d0a2 | 6173 | list_del_init(&nbl->nbl_lru); |
0cc11a61 | 6174 | spin_unlock(&nn->blocked_locks_lock); |
76d348fa JL |
6175 | } |
6176 | free_blocked_lock(nbl); | |
6177 | } | |
de18643d TM |
6178 | if (filp) |
6179 | fput(filp); | |
5db1c03f JL |
6180 | if (lock_stp) { |
6181 | /* Bump seqid manually if the 4.0 replay owner is openowner */ | |
6182 | if (cstate->replay_owner && | |
6183 | cstate->replay_owner != &lock_sop->lo_owner && | |
6184 | seqid_mutating_err(ntohl(status))) | |
6185 | lock_sop->lo_owner.so_seqid++; | |
6186 | ||
6187 | /* | |
6188 | * If this is a new, never-before-used stateid, and we are | |
6189 | * returning an error, then just go ahead and release it. | |
6190 | */ | |
25020720 | 6191 | if (status && new) |
5db1c03f | 6192 | release_lock_stateid(lock_stp); |
beeca19c TM |
6193 | |
6194 | mutex_unlock(&lock_stp->st_mutex); | |
5db1c03f | 6195 | |
3d0fabd5 | 6196 | nfs4_put_stid(&lock_stp->st_stid); |
5db1c03f | 6197 | } |
0667b1e9 TM |
6198 | if (open_stp) |
6199 | nfs4_put_stid(&open_stp->st_stid); | |
9411b1d4 | 6200 | nfsd4_bump_seqid(cstate, status); |
21179d81 JL |
6201 | if (conflock) |
6202 | locks_free_lock(conflock); | |
1da177e4 LT |
6203 | return status; |
6204 | } | |
6205 | ||
55ef1274 BF |
6206 | /* |
6207 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
6208 | * so we do a temporary open here just to get an open file to pass to | |
6209 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
6210 | * inode operation.) | |
6211 | */ | |
04da6e9d | 6212 | static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) |
55ef1274 BF |
6213 | { |
6214 | struct file *file; | |
04da6e9d AV |
6215 | __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); |
6216 | if (!err) { | |
6217 | err = nfserrno(vfs_test_lock(file, lock)); | |
fd891454 | 6218 | fput(file); |
04da6e9d | 6219 | } |
55ef1274 BF |
6220 | return err; |
6221 | } | |
6222 | ||
1da177e4 LT |
6223 | /* |
6224 | * LOCKT operation | |
6225 | */ | |
b37ad28b | 6226 | __be32 |
ca364317 | 6227 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 6228 | union nfsd4_op_u *u) |
1da177e4 | 6229 | { |
eb69853d | 6230 | struct nfsd4_lockt *lockt = &u->lockt; |
21179d81 | 6231 | struct file_lock *file_lock = NULL; |
5db1c03f | 6232 | struct nfs4_lockowner *lo = NULL; |
b37ad28b | 6233 | __be32 status; |
7f2210fa | 6234 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 6235 | |
5ccb0066 | 6236 | if (locks_in_grace(SVC_NET(rqstp))) |
1da177e4 LT |
6237 | return nfserr_grace; |
6238 | ||
6239 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
6240 | return nfserr_inval; | |
6241 | ||
9b2ef62b | 6242 | if (!nfsd4_has_session(cstate)) { |
4b24ca7d | 6243 | status = lookup_clientid(&lockt->lt_clientid, cstate, nn); |
9b2ef62b BF |
6244 | if (status) |
6245 | goto out; | |
6246 | } | |
1da177e4 | 6247 | |
75c096f7 | 6248 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 6249 | goto out; |
1da177e4 | 6250 | |
21179d81 JL |
6251 | file_lock = locks_alloc_lock(); |
6252 | if (!file_lock) { | |
6253 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
6254 | status = nfserr_jukebox; | |
6255 | goto out; | |
6256 | } | |
6cd90662 | 6257 | |
1da177e4 LT |
6258 | switch (lockt->lt_type) { |
6259 | case NFS4_READ_LT: | |
6260 | case NFS4_READW_LT: | |
21179d81 | 6261 | file_lock->fl_type = F_RDLCK; |
f50c9d79 | 6262 | break; |
1da177e4 LT |
6263 | case NFS4_WRITE_LT: |
6264 | case NFS4_WRITEW_LT: | |
21179d81 | 6265 | file_lock->fl_type = F_WRLCK; |
f50c9d79 | 6266 | break; |
1da177e4 | 6267 | default: |
2fdada03 | 6268 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 | 6269 | status = nfserr_inval; |
f50c9d79 | 6270 | goto out; |
1da177e4 LT |
6271 | } |
6272 | ||
c8623999 | 6273 | lo = find_lockowner_str(cstate->clp, &lockt->lt_owner); |
fe0750e5 | 6274 | if (lo) |
21179d81 JL |
6275 | file_lock->fl_owner = (fl_owner_t)lo; |
6276 | file_lock->fl_pid = current->tgid; | |
6277 | file_lock->fl_flags = FL_POSIX; | |
1da177e4 | 6278 | |
21179d81 JL |
6279 | file_lock->fl_start = lockt->lt_offset; |
6280 | file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); | |
1da177e4 | 6281 | |
21179d81 | 6282 | nfs4_transform_lock_offset(file_lock); |
1da177e4 | 6283 | |
21179d81 | 6284 | status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock); |
04da6e9d | 6285 | if (status) |
fd85b817 | 6286 | goto out; |
04da6e9d | 6287 | |
21179d81 | 6288 | if (file_lock->fl_type != F_UNLCK) { |
1da177e4 | 6289 | status = nfserr_denied; |
21179d81 | 6290 | nfs4_set_lock_denied(file_lock, &lockt->lt_denied); |
1da177e4 LT |
6291 | } |
6292 | out: | |
5db1c03f JL |
6293 | if (lo) |
6294 | nfs4_put_stateowner(&lo->lo_owner); | |
21179d81 JL |
6295 | if (file_lock) |
6296 | locks_free_lock(file_lock); | |
1da177e4 LT |
6297 | return status; |
6298 | } | |
6299 | ||
b37ad28b | 6300 | __be32 |
ca364317 | 6301 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 6302 | union nfsd4_op_u *u) |
1da177e4 | 6303 | { |
eb69853d | 6304 | struct nfsd4_locku *locku = &u->locku; |
dcef0413 | 6305 | struct nfs4_ol_stateid *stp; |
1da177e4 | 6306 | struct file *filp = NULL; |
21179d81 | 6307 | struct file_lock *file_lock = NULL; |
b37ad28b | 6308 | __be32 status; |
b8dd7b9a | 6309 | int err; |
3320fef1 SK |
6310 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
6311 | ||
1da177e4 LT |
6312 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", |
6313 | (long long) locku->lu_offset, | |
6314 | (long long) locku->lu_length); | |
6315 | ||
6316 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
6317 | return nfserr_inval; | |
6318 | ||
9072d5c6 | 6319 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
3320fef1 SK |
6320 | &locku->lu_stateid, NFS4_LOCK_STID, |
6321 | &stp, nn); | |
9072d5c6 | 6322 | if (status) |
1da177e4 | 6323 | goto out; |
11b9164a | 6324 | filp = find_any_file(stp->st_stid.sc_file); |
f9d7562f BF |
6325 | if (!filp) { |
6326 | status = nfserr_lock_range; | |
858cc573 | 6327 | goto put_stateid; |
f9d7562f | 6328 | } |
21179d81 JL |
6329 | file_lock = locks_alloc_lock(); |
6330 | if (!file_lock) { | |
6331 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
6332 | status = nfserr_jukebox; | |
de18643d | 6333 | goto fput; |
21179d81 | 6334 | } |
6cd90662 | 6335 | |
21179d81 | 6336 | file_lock->fl_type = F_UNLCK; |
aef9583b | 6337 | file_lock->fl_owner = (fl_owner_t)lockowner(nfs4_get_stateowner(stp->st_stateowner)); |
21179d81 JL |
6338 | file_lock->fl_pid = current->tgid; |
6339 | file_lock->fl_file = filp; | |
6340 | file_lock->fl_flags = FL_POSIX; | |
6341 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
6342 | file_lock->fl_start = locku->lu_offset; | |
6343 | ||
6344 | file_lock->fl_end = last_byte_offset(locku->lu_offset, | |
6345 | locku->lu_length); | |
6346 | nfs4_transform_lock_offset(file_lock); | |
1da177e4 | 6347 | |
21179d81 | 6348 | err = vfs_lock_file(filp, F_SETLK, file_lock, NULL); |
b8dd7b9a | 6349 | if (err) { |
fd85b817 | 6350 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
6351 | goto out_nfserr; |
6352 | } | |
9767feb2 | 6353 | nfs4_inc_and_copy_stateid(&locku->lu_stateid, &stp->st_stid); |
de18643d TM |
6354 | fput: |
6355 | fput(filp); | |
858cc573 | 6356 | put_stateid: |
feb9dad5 | 6357 | mutex_unlock(&stp->st_mutex); |
858cc573 | 6358 | nfs4_put_stid(&stp->st_stid); |
1da177e4 | 6359 | out: |
9411b1d4 | 6360 | nfsd4_bump_seqid(cstate, status); |
21179d81 JL |
6361 | if (file_lock) |
6362 | locks_free_lock(file_lock); | |
1da177e4 LT |
6363 | return status; |
6364 | ||
6365 | out_nfserr: | |
b8dd7b9a | 6366 | status = nfserrno(err); |
de18643d | 6367 | goto fput; |
1da177e4 LT |
6368 | } |
6369 | ||
6370 | /* | |
6371 | * returns | |
f9c00c3a JL |
6372 | * true: locks held by lockowner |
6373 | * false: no locks held by lockowner | |
1da177e4 | 6374 | */ |
f9c00c3a JL |
6375 | static bool |
6376 | check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner) | |
1da177e4 | 6377 | { |
bd61e0a9 | 6378 | struct file_lock *fl; |
f9c00c3a JL |
6379 | int status = false; |
6380 | struct file *filp = find_any_file(fp); | |
6381 | struct inode *inode; | |
bd61e0a9 | 6382 | struct file_lock_context *flctx; |
f9c00c3a JL |
6383 | |
6384 | if (!filp) { | |
6385 | /* Any valid lock stateid should have some sort of access */ | |
6386 | WARN_ON_ONCE(1); | |
6387 | return status; | |
6388 | } | |
6389 | ||
64bed6cb | 6390 | inode = locks_inode(filp); |
bd61e0a9 JL |
6391 | flctx = inode->i_flctx; |
6392 | ||
6393 | if (flctx && !list_empty_careful(&flctx->flc_posix)) { | |
6109c850 | 6394 | spin_lock(&flctx->flc_lock); |
bd61e0a9 JL |
6395 | list_for_each_entry(fl, &flctx->flc_posix, fl_list) { |
6396 | if (fl->fl_owner == (fl_owner_t)lowner) { | |
6397 | status = true; | |
6398 | break; | |
6399 | } | |
796dadfd | 6400 | } |
6109c850 | 6401 | spin_unlock(&flctx->flc_lock); |
1da177e4 | 6402 | } |
f9c00c3a | 6403 | fput(filp); |
1da177e4 LT |
6404 | return status; |
6405 | } | |
6406 | ||
b37ad28b | 6407 | __be32 |
b591480b BF |
6408 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
6409 | struct nfsd4_compound_state *cstate, | |
eb69853d | 6410 | union nfsd4_op_u *u) |
1da177e4 | 6411 | { |
eb69853d | 6412 | struct nfsd4_release_lockowner *rlockowner = &u->release_lockowner; |
1da177e4 | 6413 | clientid_t *clid = &rlockowner->rl_clientid; |
882e9d25 JL |
6414 | struct nfs4_stateowner *sop; |
6415 | struct nfs4_lockowner *lo = NULL; | |
dcef0413 | 6416 | struct nfs4_ol_stateid *stp; |
1da177e4 | 6417 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
d4f0489f | 6418 | unsigned int hashval = ownerstr_hashval(owner); |
b37ad28b | 6419 | __be32 status; |
7f2210fa | 6420 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
c58c6610 | 6421 | struct nfs4_client *clp; |
88584818 | 6422 | LIST_HEAD (reaplist); |
1da177e4 LT |
6423 | |
6424 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
6425 | clid->cl_boot, clid->cl_id); | |
6426 | ||
4b24ca7d | 6427 | status = lookup_clientid(clid, cstate, nn); |
9b2ef62b | 6428 | if (status) |
51f5e783 | 6429 | return status; |
9b2ef62b | 6430 | |
d4f0489f | 6431 | clp = cstate->clp; |
fd44907c | 6432 | /* Find the matching lock stateowner */ |
d4f0489f | 6433 | spin_lock(&clp->cl_lock); |
882e9d25 | 6434 | list_for_each_entry(sop, &clp->cl_ownerstr_hashtbl[hashval], |
d4f0489f | 6435 | so_strhash) { |
fd44907c | 6436 | |
882e9d25 JL |
6437 | if (sop->so_is_open_owner || !same_owner_str(sop, owner)) |
6438 | continue; | |
fd44907c | 6439 | |
882e9d25 JL |
6440 | /* see if there are still any locks associated with it */ |
6441 | lo = lockowner(sop); | |
6442 | list_for_each_entry(stp, &sop->so_stateids, st_perstateowner) { | |
6443 | if (check_for_locks(stp->st_stid.sc_file, lo)) { | |
6444 | status = nfserr_locks_held; | |
6445 | spin_unlock(&clp->cl_lock); | |
51f5e783 | 6446 | return status; |
882e9d25 | 6447 | } |
5adfd885 | 6448 | } |
882e9d25 | 6449 | |
b5971afa | 6450 | nfs4_get_stateowner(sop); |
882e9d25 | 6451 | break; |
1da177e4 | 6452 | } |
88584818 CL |
6453 | if (!lo) { |
6454 | spin_unlock(&clp->cl_lock); | |
6455 | return status; | |
6456 | } | |
6457 | ||
6458 | unhash_lockowner_locked(lo); | |
6459 | while (!list_empty(&lo->lo_owner.so_stateids)) { | |
6460 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
6461 | struct nfs4_ol_stateid, | |
6462 | st_perstateowner); | |
6463 | WARN_ON(!unhash_lock_stateid(stp)); | |
6464 | put_ol_stateid_locked(stp, &reaplist); | |
6465 | } | |
c58c6610 | 6466 | spin_unlock(&clp->cl_lock); |
88584818 | 6467 | free_ol_stateid_reaplist(&reaplist); |
68ef3bc3 | 6468 | remove_blocked_locks(lo); |
88584818 CL |
6469 | nfs4_put_stateowner(&lo->lo_owner); |
6470 | ||
1da177e4 LT |
6471 | return status; |
6472 | } | |
6473 | ||
6474 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 6475 | alloc_reclaim(void) |
1da177e4 | 6476 | { |
a55370a3 | 6477 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
6478 | } |
6479 | ||
0ce0c2b5 | 6480 | bool |
6b189105 | 6481 | nfs4_has_reclaimed_state(struct xdr_netobj name, struct nfsd_net *nn) |
c7b9a459 | 6482 | { |
0ce0c2b5 | 6483 | struct nfs4_client_reclaim *crp; |
c7b9a459 | 6484 | |
52e19c09 | 6485 | crp = nfsd4_find_reclaim_client(name, nn); |
0ce0c2b5 | 6486 | return (crp && crp->cr_clp); |
c7b9a459 N |
6487 | } |
6488 | ||
1da177e4 LT |
6489 | /* |
6490 | * failure => all reset bets are off, nfserr_no_grace... | |
6b189105 SM |
6491 | * |
6492 | * The caller is responsible for freeing name.data if NULL is returned (it | |
6493 | * will be freed in nfs4_remove_reclaim_record in the normal case). | |
1da177e4 | 6494 | */ |
772a9bbb | 6495 | struct nfs4_client_reclaim * |
6b189105 | 6496 | nfs4_client_to_reclaim(struct xdr_netobj name, struct nfsd_net *nn) |
1da177e4 LT |
6497 | { |
6498 | unsigned int strhashval; | |
772a9bbb | 6499 | struct nfs4_client_reclaim *crp; |
1da177e4 | 6500 | |
6b189105 | 6501 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", name.len, name.data); |
a55370a3 | 6502 | crp = alloc_reclaim(); |
772a9bbb JL |
6503 | if (crp) { |
6504 | strhashval = clientstr_hashval(name); | |
6505 | INIT_LIST_HEAD(&crp->cr_strhash); | |
52e19c09 | 6506 | list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]); |
6b189105 SM |
6507 | crp->cr_name.data = name.data; |
6508 | crp->cr_name.len = name.len; | |
0ce0c2b5 | 6509 | crp->cr_clp = NULL; |
52e19c09 | 6510 | nn->reclaim_str_hashtbl_size++; |
772a9bbb JL |
6511 | } |
6512 | return crp; | |
1da177e4 LT |
6513 | } |
6514 | ||
ce30e539 | 6515 | void |
52e19c09 | 6516 | nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn) |
ce30e539 JL |
6517 | { |
6518 | list_del(&crp->cr_strhash); | |
6b189105 | 6519 | kfree(crp->cr_name.data); |
ce30e539 | 6520 | kfree(crp); |
52e19c09 | 6521 | nn->reclaim_str_hashtbl_size--; |
ce30e539 JL |
6522 | } |
6523 | ||
2a4317c5 | 6524 | void |
52e19c09 | 6525 | nfs4_release_reclaim(struct nfsd_net *nn) |
1da177e4 LT |
6526 | { |
6527 | struct nfs4_client_reclaim *crp = NULL; | |
6528 | int i; | |
6529 | ||
1da177e4 | 6530 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
52e19c09 SK |
6531 | while (!list_empty(&nn->reclaim_str_hashtbl[i])) { |
6532 | crp = list_entry(nn->reclaim_str_hashtbl[i].next, | |
1da177e4 | 6533 | struct nfs4_client_reclaim, cr_strhash); |
52e19c09 | 6534 | nfs4_remove_reclaim_record(crp, nn); |
1da177e4 LT |
6535 | } |
6536 | } | |
063b0fb9 | 6537 | WARN_ON_ONCE(nn->reclaim_str_hashtbl_size); |
1da177e4 LT |
6538 | } |
6539 | ||
6540 | /* | |
6541 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
2a4317c5 | 6542 | struct nfs4_client_reclaim * |
6b189105 | 6543 | nfsd4_find_reclaim_client(struct xdr_netobj name, struct nfsd_net *nn) |
1da177e4 LT |
6544 | { |
6545 | unsigned int strhashval; | |
1da177e4 LT |
6546 | struct nfs4_client_reclaim *crp = NULL; |
6547 | ||
6b189105 | 6548 | dprintk("NFSD: nfs4_find_reclaim_client for name %.*s\n", name.len, name.data); |
1da177e4 | 6549 | |
6b189105 | 6550 | strhashval = clientstr_hashval(name); |
52e19c09 | 6551 | list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) { |
6b189105 | 6552 | if (compare_blob(&crp->cr_name, &name) == 0) { |
1da177e4 LT |
6553 | return crp; |
6554 | } | |
6555 | } | |
6556 | return NULL; | |
6557 | } | |
6558 | ||
6559 | /* | |
6560 | * Called from OPEN. Look for clientid in reclaim list. | |
6561 | */ | |
b37ad28b | 6562 | __be32 |
0fe492db TM |
6563 | nfs4_check_open_reclaim(clientid_t *clid, |
6564 | struct nfsd4_compound_state *cstate, | |
6565 | struct nfsd_net *nn) | |
1da177e4 | 6566 | { |
0fe492db | 6567 | __be32 status; |
a52d726b JL |
6568 | |
6569 | /* find clientid in conf_id_hashtbl */ | |
0fe492db TM |
6570 | status = lookup_clientid(clid, cstate, nn); |
6571 | if (status) | |
a52d726b JL |
6572 | return nfserr_reclaim_bad; |
6573 | ||
3b3e7b72 JL |
6574 | if (test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, &cstate->clp->cl_flags)) |
6575 | return nfserr_no_grace; | |
6576 | ||
0fe492db TM |
6577 | if (nfsd4_client_record_check(cstate->clp)) |
6578 | return nfserr_reclaim_bad; | |
6579 | ||
6580 | return nfs_ok; | |
1da177e4 LT |
6581 | } |
6582 | ||
65178db4 | 6583 | #ifdef CONFIG_NFSD_FAULT_INJECTION |
016200c3 JL |
6584 | static inline void |
6585 | put_client(struct nfs4_client *clp) | |
6586 | { | |
6587 | atomic_dec(&clp->cl_refcount); | |
6588 | } | |
6589 | ||
285abdee JL |
6590 | static struct nfs4_client * |
6591 | nfsd_find_client(struct sockaddr_storage *addr, size_t addr_size) | |
6592 | { | |
6593 | struct nfs4_client *clp; | |
6594 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6595 | nfsd_net_id); | |
6596 | ||
6597 | if (!nfsd_netns_ready(nn)) | |
6598 | return NULL; | |
6599 | ||
6600 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
6601 | if (memcmp(&clp->cl_addr, addr, addr_size) == 0) | |
6602 | return clp; | |
6603 | } | |
6604 | return NULL; | |
6605 | } | |
6606 | ||
7ec0e36f | 6607 | u64 |
285abdee | 6608 | nfsd_inject_print_clients(void) |
7ec0e36f JL |
6609 | { |
6610 | struct nfs4_client *clp; | |
6611 | u64 count = 0; | |
6612 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6613 | nfsd_net_id); | |
6614 | char buf[INET6_ADDRSTRLEN]; | |
6615 | ||
6616 | if (!nfsd_netns_ready(nn)) | |
6617 | return 0; | |
6618 | ||
6619 | spin_lock(&nn->client_lock); | |
6620 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
6621 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); | |
6622 | pr_info("NFS Client: %s\n", buf); | |
6623 | ++count; | |
6624 | } | |
6625 | spin_unlock(&nn->client_lock); | |
6626 | ||
6627 | return count; | |
6628 | } | |
65178db4 | 6629 | |
a0926d15 | 6630 | u64 |
285abdee | 6631 | nfsd_inject_forget_client(struct sockaddr_storage *addr, size_t addr_size) |
a0926d15 JL |
6632 | { |
6633 | u64 count = 0; | |
6634 | struct nfs4_client *clp; | |
6635 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6636 | nfsd_net_id); | |
6637 | ||
6638 | if (!nfsd_netns_ready(nn)) | |
6639 | return count; | |
6640 | ||
6641 | spin_lock(&nn->client_lock); | |
6642 | clp = nfsd_find_client(addr, addr_size); | |
6643 | if (clp) { | |
6644 | if (mark_client_expired_locked(clp) == nfs_ok) | |
6645 | ++count; | |
6646 | else | |
6647 | clp = NULL; | |
6648 | } | |
6649 | spin_unlock(&nn->client_lock); | |
6650 | ||
6651 | if (clp) | |
6652 | expire_client(clp); | |
6653 | ||
6654 | return count; | |
6655 | } | |
6656 | ||
69fc9edf | 6657 | u64 |
285abdee | 6658 | nfsd_inject_forget_clients(u64 max) |
69fc9edf JL |
6659 | { |
6660 | u64 count = 0; | |
6661 | struct nfs4_client *clp, *next; | |
6662 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6663 | nfsd_net_id); | |
6664 | LIST_HEAD(reaplist); | |
6665 | ||
6666 | if (!nfsd_netns_ready(nn)) | |
6667 | return count; | |
6668 | ||
6669 | spin_lock(&nn->client_lock); | |
6670 | list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { | |
6671 | if (mark_client_expired_locked(clp) == nfs_ok) { | |
6672 | list_add(&clp->cl_lru, &reaplist); | |
6673 | if (max != 0 && ++count >= max) | |
6674 | break; | |
6675 | } | |
6676 | } | |
6677 | spin_unlock(&nn->client_lock); | |
6678 | ||
6679 | list_for_each_entry_safe(clp, next, &reaplist, cl_lru) | |
6680 | expire_client(clp); | |
6681 | ||
6682 | return count; | |
6683 | } | |
6684 | ||
184c1847 BS |
6685 | static void nfsd_print_count(struct nfs4_client *clp, unsigned int count, |
6686 | const char *type) | |
6687 | { | |
6688 | char buf[INET6_ADDRSTRLEN]; | |
0a5c33e2 | 6689 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
184c1847 BS |
6690 | printk(KERN_INFO "NFS Client: %s has %u %s\n", buf, count, type); |
6691 | } | |
6692 | ||
016200c3 JL |
6693 | static void |
6694 | nfsd_inject_add_lock_to_list(struct nfs4_ol_stateid *lst, | |
6695 | struct list_head *collect) | |
6696 | { | |
6697 | struct nfs4_client *clp = lst->st_stid.sc_client; | |
6698 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6699 | nfsd_net_id); | |
6700 | ||
6701 | if (!collect) | |
6702 | return; | |
6703 | ||
6704 | lockdep_assert_held(&nn->client_lock); | |
6705 | atomic_inc(&clp->cl_refcount); | |
6706 | list_add(&lst->st_locks, collect); | |
6707 | } | |
6708 | ||
3c87b9b7 | 6709 | static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max, |
3738d50e | 6710 | struct list_head *collect, |
e8568739 | 6711 | bool (*func)(struct nfs4_ol_stateid *)) |
fc29171f BS |
6712 | { |
6713 | struct nfs4_openowner *oop; | |
fc29171f | 6714 | struct nfs4_ol_stateid *stp, *st_next; |
3c87b9b7 | 6715 | struct nfs4_ol_stateid *lst, *lst_next; |
fc29171f BS |
6716 | u64 count = 0; |
6717 | ||
016200c3 | 6718 | spin_lock(&clp->cl_lock); |
fc29171f | 6719 | list_for_each_entry(oop, &clp->cl_openowners, oo_perclient) { |
3c87b9b7 TM |
6720 | list_for_each_entry_safe(stp, st_next, |
6721 | &oop->oo_owner.so_stateids, st_perstateowner) { | |
6722 | list_for_each_entry_safe(lst, lst_next, | |
6723 | &stp->st_locks, st_locks) { | |
3738d50e | 6724 | if (func) { |
e8568739 JL |
6725 | if (func(lst)) |
6726 | nfsd_inject_add_lock_to_list(lst, | |
6727 | collect); | |
3738d50e | 6728 | } |
016200c3 JL |
6729 | ++count; |
6730 | /* | |
6731 | * Despite the fact that these functions deal | |
6732 | * with 64-bit integers for "count", we must | |
6733 | * ensure that it doesn't blow up the | |
6734 | * clp->cl_refcount. Throw a warning if we | |
6735 | * start to approach INT_MAX here. | |
6736 | */ | |
6737 | WARN_ON_ONCE(count == (INT_MAX / 2)); | |
6738 | if (count == max) | |
6739 | goto out; | |
fc29171f BS |
6740 | } |
6741 | } | |
6742 | } | |
016200c3 JL |
6743 | out: |
6744 | spin_unlock(&clp->cl_lock); | |
fc29171f BS |
6745 | |
6746 | return count; | |
6747 | } | |
6748 | ||
016200c3 JL |
6749 | static u64 |
6750 | nfsd_collect_client_locks(struct nfs4_client *clp, struct list_head *collect, | |
6751 | u64 max) | |
fc29171f | 6752 | { |
016200c3 | 6753 | return nfsd_foreach_client_lock(clp, max, collect, unhash_lock_stateid); |
fc29171f BS |
6754 | } |
6755 | ||
016200c3 JL |
6756 | static u64 |
6757 | nfsd_print_client_locks(struct nfs4_client *clp) | |
184c1847 | 6758 | { |
016200c3 | 6759 | u64 count = nfsd_foreach_client_lock(clp, 0, NULL, NULL); |
184c1847 BS |
6760 | nfsd_print_count(clp, count, "locked files"); |
6761 | return count; | |
6762 | } | |
6763 | ||
016200c3 | 6764 | u64 |
285abdee | 6765 | nfsd_inject_print_locks(void) |
016200c3 JL |
6766 | { |
6767 | struct nfs4_client *clp; | |
6768 | u64 count = 0; | |
6769 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6770 | nfsd_net_id); | |
6771 | ||
6772 | if (!nfsd_netns_ready(nn)) | |
6773 | return 0; | |
6774 | ||
6775 | spin_lock(&nn->client_lock); | |
6776 | list_for_each_entry(clp, &nn->client_lru, cl_lru) | |
6777 | count += nfsd_print_client_locks(clp); | |
6778 | spin_unlock(&nn->client_lock); | |
6779 | ||
6780 | return count; | |
6781 | } | |
6782 | ||
6783 | static void | |
6784 | nfsd_reap_locks(struct list_head *reaplist) | |
6785 | { | |
6786 | struct nfs4_client *clp; | |
6787 | struct nfs4_ol_stateid *stp, *next; | |
6788 | ||
6789 | list_for_each_entry_safe(stp, next, reaplist, st_locks) { | |
6790 | list_del_init(&stp->st_locks); | |
6791 | clp = stp->st_stid.sc_client; | |
6792 | nfs4_put_stid(&stp->st_stid); | |
6793 | put_client(clp); | |
6794 | } | |
6795 | } | |
6796 | ||
6797 | u64 | |
285abdee | 6798 | nfsd_inject_forget_client_locks(struct sockaddr_storage *addr, size_t addr_size) |
016200c3 JL |
6799 | { |
6800 | unsigned int count = 0; | |
6801 | struct nfs4_client *clp; | |
6802 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6803 | nfsd_net_id); | |
6804 | LIST_HEAD(reaplist); | |
6805 | ||
6806 | if (!nfsd_netns_ready(nn)) | |
6807 | return count; | |
6808 | ||
6809 | spin_lock(&nn->client_lock); | |
6810 | clp = nfsd_find_client(addr, addr_size); | |
6811 | if (clp) | |
6812 | count = nfsd_collect_client_locks(clp, &reaplist, 0); | |
6813 | spin_unlock(&nn->client_lock); | |
6814 | nfsd_reap_locks(&reaplist); | |
6815 | return count; | |
6816 | } | |
6817 | ||
6818 | u64 | |
285abdee | 6819 | nfsd_inject_forget_locks(u64 max) |
016200c3 JL |
6820 | { |
6821 | u64 count = 0; | |
6822 | struct nfs4_client *clp; | |
6823 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6824 | nfsd_net_id); | |
6825 | LIST_HEAD(reaplist); | |
6826 | ||
6827 | if (!nfsd_netns_ready(nn)) | |
6828 | return count; | |
6829 | ||
6830 | spin_lock(&nn->client_lock); | |
6831 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
6832 | count += nfsd_collect_client_locks(clp, &reaplist, max - count); | |
6833 | if (max != 0 && count >= max) | |
6834 | break; | |
6835 | } | |
6836 | spin_unlock(&nn->client_lock); | |
6837 | nfsd_reap_locks(&reaplist); | |
6838 | return count; | |
6839 | } | |
6840 | ||
82e05efa JL |
6841 | static u64 |
6842 | nfsd_foreach_client_openowner(struct nfs4_client *clp, u64 max, | |
6843 | struct list_head *collect, | |
6844 | void (*func)(struct nfs4_openowner *)) | |
4dbdbda8 BS |
6845 | { |
6846 | struct nfs4_openowner *oop, *next; | |
82e05efa JL |
6847 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, |
6848 | nfsd_net_id); | |
4dbdbda8 BS |
6849 | u64 count = 0; |
6850 | ||
82e05efa JL |
6851 | lockdep_assert_held(&nn->client_lock); |
6852 | ||
6853 | spin_lock(&clp->cl_lock); | |
4dbdbda8 | 6854 | list_for_each_entry_safe(oop, next, &clp->cl_openowners, oo_perclient) { |
82e05efa | 6855 | if (func) { |
4dbdbda8 | 6856 | func(oop); |
82e05efa JL |
6857 | if (collect) { |
6858 | atomic_inc(&clp->cl_refcount); | |
6859 | list_add(&oop->oo_perclient, collect); | |
6860 | } | |
6861 | } | |
6862 | ++count; | |
6863 | /* | |
6864 | * Despite the fact that these functions deal with | |
6865 | * 64-bit integers for "count", we must ensure that | |
6866 | * it doesn't blow up the clp->cl_refcount. Throw a | |
6867 | * warning if we start to approach INT_MAX here. | |
6868 | */ | |
6869 | WARN_ON_ONCE(count == (INT_MAX / 2)); | |
6870 | if (count == max) | |
4dbdbda8 BS |
6871 | break; |
6872 | } | |
82e05efa JL |
6873 | spin_unlock(&clp->cl_lock); |
6874 | ||
6875 | return count; | |
6876 | } | |
6877 | ||
6878 | static u64 | |
6879 | nfsd_print_client_openowners(struct nfs4_client *clp) | |
6880 | { | |
6881 | u64 count = nfsd_foreach_client_openowner(clp, 0, NULL, NULL); | |
6882 | ||
6883 | nfsd_print_count(clp, count, "openowners"); | |
6884 | return count; | |
6885 | } | |
6886 | ||
6887 | static u64 | |
6888 | nfsd_collect_client_openowners(struct nfs4_client *clp, | |
6889 | struct list_head *collect, u64 max) | |
6890 | { | |
6891 | return nfsd_foreach_client_openowner(clp, max, collect, | |
6892 | unhash_openowner_locked); | |
6893 | } | |
6894 | ||
6895 | u64 | |
285abdee | 6896 | nfsd_inject_print_openowners(void) |
82e05efa JL |
6897 | { |
6898 | struct nfs4_client *clp; | |
6899 | u64 count = 0; | |
6900 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6901 | nfsd_net_id); | |
6902 | ||
6903 | if (!nfsd_netns_ready(nn)) | |
6904 | return 0; | |
6905 | ||
6906 | spin_lock(&nn->client_lock); | |
6907 | list_for_each_entry(clp, &nn->client_lru, cl_lru) | |
6908 | count += nfsd_print_client_openowners(clp); | |
6909 | spin_unlock(&nn->client_lock); | |
4dbdbda8 BS |
6910 | |
6911 | return count; | |
6912 | } | |
6913 | ||
82e05efa JL |
6914 | static void |
6915 | nfsd_reap_openowners(struct list_head *reaplist) | |
6916 | { | |
6917 | struct nfs4_client *clp; | |
6918 | struct nfs4_openowner *oop, *next; | |
6919 | ||
6920 | list_for_each_entry_safe(oop, next, reaplist, oo_perclient) { | |
6921 | list_del_init(&oop->oo_perclient); | |
6922 | clp = oop->oo_owner.so_client; | |
6923 | release_openowner(oop); | |
6924 | put_client(clp); | |
6925 | } | |
6926 | } | |
6927 | ||
6928 | u64 | |
285abdee JL |
6929 | nfsd_inject_forget_client_openowners(struct sockaddr_storage *addr, |
6930 | size_t addr_size) | |
4dbdbda8 | 6931 | { |
82e05efa JL |
6932 | unsigned int count = 0; |
6933 | struct nfs4_client *clp; | |
6934 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6935 | nfsd_net_id); | |
6936 | LIST_HEAD(reaplist); | |
6937 | ||
6938 | if (!nfsd_netns_ready(nn)) | |
6939 | return count; | |
6940 | ||
6941 | spin_lock(&nn->client_lock); | |
6942 | clp = nfsd_find_client(addr, addr_size); | |
6943 | if (clp) | |
6944 | count = nfsd_collect_client_openowners(clp, &reaplist, 0); | |
6945 | spin_unlock(&nn->client_lock); | |
6946 | nfsd_reap_openowners(&reaplist); | |
6947 | return count; | |
4dbdbda8 BS |
6948 | } |
6949 | ||
82e05efa | 6950 | u64 |
285abdee | 6951 | nfsd_inject_forget_openowners(u64 max) |
184c1847 | 6952 | { |
82e05efa JL |
6953 | u64 count = 0; |
6954 | struct nfs4_client *clp; | |
6955 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6956 | nfsd_net_id); | |
6957 | LIST_HEAD(reaplist); | |
6958 | ||
6959 | if (!nfsd_netns_ready(nn)) | |
6960 | return count; | |
6961 | ||
6962 | spin_lock(&nn->client_lock); | |
6963 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
6964 | count += nfsd_collect_client_openowners(clp, &reaplist, | |
6965 | max - count); | |
6966 | if (max != 0 && count >= max) | |
6967 | break; | |
6968 | } | |
6969 | spin_unlock(&nn->client_lock); | |
6970 | nfsd_reap_openowners(&reaplist); | |
184c1847 BS |
6971 | return count; |
6972 | } | |
6973 | ||
269de30f BS |
6974 | static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max, |
6975 | struct list_head *victims) | |
6976 | { | |
6977 | struct nfs4_delegation *dp, *next; | |
98d5c7c5 JL |
6978 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, |
6979 | nfsd_net_id); | |
269de30f BS |
6980 | u64 count = 0; |
6981 | ||
98d5c7c5 JL |
6982 | lockdep_assert_held(&nn->client_lock); |
6983 | ||
6984 | spin_lock(&state_lock); | |
269de30f | 6985 | list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) { |
dff1399f JL |
6986 | if (victims) { |
6987 | /* | |
6988 | * It's not safe to mess with delegations that have a | |
6989 | * non-zero dl_time. They might have already been broken | |
6990 | * and could be processed by the laundromat outside of | |
6991 | * the state_lock. Just leave them be. | |
6992 | */ | |
6993 | if (dp->dl_time != 0) | |
6994 | continue; | |
6995 | ||
98d5c7c5 | 6996 | atomic_inc(&clp->cl_refcount); |
3fcbbd24 | 6997 | WARN_ON(!unhash_delegation_locked(dp)); |
42690676 | 6998 | list_add(&dp->dl_recall_lru, victims); |
dff1399f | 6999 | } |
98d5c7c5 JL |
7000 | ++count; |
7001 | /* | |
7002 | * Despite the fact that these functions deal with | |
7003 | * 64-bit integers for "count", we must ensure that | |
7004 | * it doesn't blow up the clp->cl_refcount. Throw a | |
7005 | * warning if we start to approach INT_MAX here. | |
7006 | */ | |
7007 | WARN_ON_ONCE(count == (INT_MAX / 2)); | |
7008 | if (count == max) | |
269de30f BS |
7009 | break; |
7010 | } | |
98d5c7c5 | 7011 | spin_unlock(&state_lock); |
269de30f BS |
7012 | return count; |
7013 | } | |
7014 | ||
98d5c7c5 JL |
7015 | static u64 |
7016 | nfsd_print_client_delegations(struct nfs4_client *clp) | |
269de30f | 7017 | { |
98d5c7c5 | 7018 | u64 count = nfsd_find_all_delegations(clp, 0, NULL); |
269de30f | 7019 | |
98d5c7c5 JL |
7020 | nfsd_print_count(clp, count, "delegations"); |
7021 | return count; | |
7022 | } | |
7023 | ||
7024 | u64 | |
285abdee | 7025 | nfsd_inject_print_delegations(void) |
98d5c7c5 JL |
7026 | { |
7027 | struct nfs4_client *clp; | |
7028 | u64 count = 0; | |
7029 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
7030 | nfsd_net_id); | |
7031 | ||
7032 | if (!nfsd_netns_ready(nn)) | |
7033 | return 0; | |
269de30f | 7034 | |
98d5c7c5 JL |
7035 | spin_lock(&nn->client_lock); |
7036 | list_for_each_entry(clp, &nn->client_lru, cl_lru) | |
7037 | count += nfsd_print_client_delegations(clp); | |
7038 | spin_unlock(&nn->client_lock); | |
7039 | ||
7040 | return count; | |
7041 | } | |
7042 | ||
7043 | static void | |
7044 | nfsd_forget_delegations(struct list_head *reaplist) | |
7045 | { | |
7046 | struct nfs4_client *clp; | |
7047 | struct nfs4_delegation *dp, *next; | |
7048 | ||
7049 | list_for_each_entry_safe(dp, next, reaplist, dl_recall_lru) { | |
2d4a532d | 7050 | list_del_init(&dp->dl_recall_lru); |
98d5c7c5 | 7051 | clp = dp->dl_stid.sc_client; |
3bd64a5b | 7052 | revoke_delegation(dp); |
98d5c7c5 | 7053 | put_client(clp); |
2d4a532d | 7054 | } |
98d5c7c5 JL |
7055 | } |
7056 | ||
7057 | u64 | |
285abdee JL |
7058 | nfsd_inject_forget_client_delegations(struct sockaddr_storage *addr, |
7059 | size_t addr_size) | |
98d5c7c5 JL |
7060 | { |
7061 | u64 count = 0; | |
7062 | struct nfs4_client *clp; | |
7063 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
7064 | nfsd_net_id); | |
7065 | LIST_HEAD(reaplist); | |
7066 | ||
7067 | if (!nfsd_netns_ready(nn)) | |
7068 | return count; | |
7069 | ||
7070 | spin_lock(&nn->client_lock); | |
7071 | clp = nfsd_find_client(addr, addr_size); | |
7072 | if (clp) | |
7073 | count = nfsd_find_all_delegations(clp, 0, &reaplist); | |
7074 | spin_unlock(&nn->client_lock); | |
7075 | ||
7076 | nfsd_forget_delegations(&reaplist); | |
7077 | return count; | |
7078 | } | |
269de30f | 7079 | |
98d5c7c5 | 7080 | u64 |
285abdee | 7081 | nfsd_inject_forget_delegations(u64 max) |
98d5c7c5 JL |
7082 | { |
7083 | u64 count = 0; | |
7084 | struct nfs4_client *clp; | |
7085 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
7086 | nfsd_net_id); | |
7087 | LIST_HEAD(reaplist); | |
7088 | ||
7089 | if (!nfsd_netns_ready(nn)) | |
7090 | return count; | |
7091 | ||
7092 | spin_lock(&nn->client_lock); | |
7093 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
7094 | count += nfsd_find_all_delegations(clp, max - count, &reaplist); | |
7095 | if (max != 0 && count >= max) | |
7096 | break; | |
7097 | } | |
7098 | spin_unlock(&nn->client_lock); | |
7099 | nfsd_forget_delegations(&reaplist); | |
269de30f BS |
7100 | return count; |
7101 | } | |
7102 | ||
98d5c7c5 JL |
7103 | static void |
7104 | nfsd_recall_delegations(struct list_head *reaplist) | |
269de30f | 7105 | { |
98d5c7c5 JL |
7106 | struct nfs4_client *clp; |
7107 | struct nfs4_delegation *dp, *next; | |
269de30f | 7108 | |
98d5c7c5 | 7109 | list_for_each_entry_safe(dp, next, reaplist, dl_recall_lru) { |
dff1399f | 7110 | list_del_init(&dp->dl_recall_lru); |
98d5c7c5 JL |
7111 | clp = dp->dl_stid.sc_client; |
7112 | /* | |
7113 | * We skipped all entries that had a zero dl_time before, | |
7114 | * so we can now reset the dl_time back to 0. If a delegation | |
7115 | * break comes in now, then it won't make any difference since | |
7116 | * we're recalling it either way. | |
7117 | */ | |
7118 | spin_lock(&state_lock); | |
dff1399f | 7119 | dp->dl_time = 0; |
98d5c7c5 | 7120 | spin_unlock(&state_lock); |
269de30f | 7121 | nfsd_break_one_deleg(dp); |
98d5c7c5 | 7122 | put_client(clp); |
dff1399f | 7123 | } |
98d5c7c5 | 7124 | } |
269de30f | 7125 | |
98d5c7c5 | 7126 | u64 |
285abdee | 7127 | nfsd_inject_recall_client_delegations(struct sockaddr_storage *addr, |
98d5c7c5 JL |
7128 | size_t addr_size) |
7129 | { | |
7130 | u64 count = 0; | |
7131 | struct nfs4_client *clp; | |
7132 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
7133 | nfsd_net_id); | |
7134 | LIST_HEAD(reaplist); | |
7135 | ||
7136 | if (!nfsd_netns_ready(nn)) | |
7137 | return count; | |
7138 | ||
7139 | spin_lock(&nn->client_lock); | |
7140 | clp = nfsd_find_client(addr, addr_size); | |
7141 | if (clp) | |
7142 | count = nfsd_find_all_delegations(clp, 0, &reaplist); | |
7143 | spin_unlock(&nn->client_lock); | |
7144 | ||
7145 | nfsd_recall_delegations(&reaplist); | |
269de30f BS |
7146 | return count; |
7147 | } | |
7148 | ||
98d5c7c5 | 7149 | u64 |
285abdee | 7150 | nfsd_inject_recall_delegations(u64 max) |
184c1847 BS |
7151 | { |
7152 | u64 count = 0; | |
98d5c7c5 JL |
7153 | struct nfs4_client *clp, *next; |
7154 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
7155 | nfsd_net_id); | |
7156 | LIST_HEAD(reaplist); | |
184c1847 | 7157 | |
98d5c7c5 JL |
7158 | if (!nfsd_netns_ready(nn)) |
7159 | return count; | |
184c1847 | 7160 | |
98d5c7c5 JL |
7161 | spin_lock(&nn->client_lock); |
7162 | list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { | |
7163 | count += nfsd_find_all_delegations(clp, max - count, &reaplist); | |
7164 | if (max != 0 && ++count >= max) | |
7165 | break; | |
7166 | } | |
7167 | spin_unlock(&nn->client_lock); | |
7168 | nfsd_recall_delegations(&reaplist); | |
184c1847 BS |
7169 | return count; |
7170 | } | |
65178db4 BS |
7171 | #endif /* CONFIG_NFSD_FAULT_INJECTION */ |
7172 | ||
c2f1a551 MS |
7173 | /* |
7174 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
7175 | * client may quite reasonably hang on to a delegation as long as it has | |
7176 | * the inode cached. This becomes an obvious problem the first time a | |
7177 | * client's inode cache approaches the size of the server's total memory. | |
7178 | * | |
7179 | * For now we avoid this problem by imposing a hard limit on the number | |
7180 | * of delegations, which varies according to the server's memory size. | |
7181 | */ | |
7182 | static void | |
7183 | set_max_delegations(void) | |
7184 | { | |
7185 | /* | |
7186 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
7187 | * estimates suggest that in the worst case (where every delegation | |
7188 | * is for a different inode), a delegation could take about 1.5K, | |
7189 | * giving a worst case usage of about 6% of memory. | |
7190 | */ | |
7191 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
7192 | } | |
7193 | ||
d85ed443 | 7194 | static int nfs4_state_create_net(struct net *net) |
8daae4dc SK |
7195 | { |
7196 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
7197 | int i; | |
7198 | ||
6da2ec56 KC |
7199 | nn->conf_id_hashtbl = kmalloc_array(CLIENT_HASH_SIZE, |
7200 | sizeof(struct list_head), | |
7201 | GFP_KERNEL); | |
8daae4dc | 7202 | if (!nn->conf_id_hashtbl) |
382a62e7 | 7203 | goto err; |
6da2ec56 KC |
7204 | nn->unconf_id_hashtbl = kmalloc_array(CLIENT_HASH_SIZE, |
7205 | sizeof(struct list_head), | |
7206 | GFP_KERNEL); | |
0a7ec377 SK |
7207 | if (!nn->unconf_id_hashtbl) |
7208 | goto err_unconf_id; | |
6da2ec56 KC |
7209 | nn->sessionid_hashtbl = kmalloc_array(SESSION_HASH_SIZE, |
7210 | sizeof(struct list_head), | |
7211 | GFP_KERNEL); | |
1872de0e SK |
7212 | if (!nn->sessionid_hashtbl) |
7213 | goto err_sessionid; | |
8daae4dc | 7214 | |
382a62e7 | 7215 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
8daae4dc | 7216 | INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]); |
0a7ec377 | 7217 | INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]); |
382a62e7 | 7218 | } |
1872de0e SK |
7219 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
7220 | INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]); | |
382a62e7 | 7221 | nn->conf_name_tree = RB_ROOT; |
a99454aa | 7222 | nn->unconf_name_tree = RB_ROOT; |
81833de1 VA |
7223 | nn->boot_time = get_seconds(); |
7224 | nn->grace_ended = false; | |
7225 | nn->nfsd4_manager.block_opens = true; | |
7226 | INIT_LIST_HEAD(&nn->nfsd4_manager.list); | |
5ed58bb2 | 7227 | INIT_LIST_HEAD(&nn->client_lru); |
73758fed | 7228 | INIT_LIST_HEAD(&nn->close_lru); |
e8c69d17 | 7229 | INIT_LIST_HEAD(&nn->del_recall_lru); |
c9a49628 | 7230 | spin_lock_init(&nn->client_lock); |
e0639dc5 OK |
7231 | spin_lock_init(&nn->s2s_cp_lock); |
7232 | idr_init(&nn->s2s_cp_stateids); | |
8daae4dc | 7233 | |
0cc11a61 JL |
7234 | spin_lock_init(&nn->blocked_locks_lock); |
7235 | INIT_LIST_HEAD(&nn->blocked_locks_lru); | |
7236 | ||
09121281 | 7237 | INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main); |
d85ed443 | 7238 | get_net(net); |
09121281 | 7239 | |
8daae4dc | 7240 | return 0; |
382a62e7 | 7241 | |
1872de0e | 7242 | err_sessionid: |
9b531137 | 7243 | kfree(nn->unconf_id_hashtbl); |
0a7ec377 SK |
7244 | err_unconf_id: |
7245 | kfree(nn->conf_id_hashtbl); | |
382a62e7 SK |
7246 | err: |
7247 | return -ENOMEM; | |
8daae4dc SK |
7248 | } |
7249 | ||
7250 | static void | |
4dce0ac9 | 7251 | nfs4_state_destroy_net(struct net *net) |
8daae4dc SK |
7252 | { |
7253 | int i; | |
7254 | struct nfs4_client *clp = NULL; | |
7255 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
7256 | ||
7257 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { | |
7258 | while (!list_empty(&nn->conf_id_hashtbl[i])) { | |
7259 | clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
7260 | destroy_client(clp); | |
7261 | } | |
7262 | } | |
a99454aa | 7263 | |
68ef3bc3 JL |
7264 | WARN_ON(!list_empty(&nn->blocked_locks_lru)); |
7265 | ||
2b905635 KM |
7266 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
7267 | while (!list_empty(&nn->unconf_id_hashtbl[i])) { | |
7268 | clp = list_entry(nn->unconf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
7269 | destroy_client(clp); | |
7270 | } | |
a99454aa SK |
7271 | } |
7272 | ||
1872de0e | 7273 | kfree(nn->sessionid_hashtbl); |
0a7ec377 | 7274 | kfree(nn->unconf_id_hashtbl); |
8daae4dc | 7275 | kfree(nn->conf_id_hashtbl); |
4dce0ac9 | 7276 | put_net(net); |
8daae4dc SK |
7277 | } |
7278 | ||
f252bc68 | 7279 | int |
d85ed443 | 7280 | nfs4_state_start_net(struct net *net) |
ac4d8ff2 | 7281 | { |
5e1533c7 | 7282 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b5a1a81e BF |
7283 | int ret; |
7284 | ||
d85ed443 | 7285 | ret = nfs4_state_create_net(net); |
8daae4dc SK |
7286 | if (ret) |
7287 | return ret; | |
d4318acd JL |
7288 | locks_start_grace(net, &nn->nfsd4_manager); |
7289 | nfsd4_client_tracking_init(net); | |
362063a5 SM |
7290 | if (nn->track_reclaim_completes && nn->reclaim_str_hashtbl_size == 0) |
7291 | goto skip_grace; | |
7e981a8a VA |
7292 | printk(KERN_INFO "NFSD: starting %ld-second grace period (net %x)\n", |
7293 | nn->nfsd4_grace, net->ns.inum); | |
5284b44e | 7294 | queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ); |
d85ed443 | 7295 | return 0; |
362063a5 SM |
7296 | |
7297 | skip_grace: | |
7298 | printk(KERN_INFO "NFSD: no clients to reclaim, skipping NFSv4 grace period (net %x)\n", | |
7299 | net->ns.inum); | |
7300 | queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_lease * HZ); | |
7301 | nfsd4_end_grace(nn); | |
7302 | return 0; | |
d85ed443 SK |
7303 | } |
7304 | ||
7305 | /* initialization to perform when the nfsd service is started: */ | |
7306 | ||
7307 | int | |
7308 | nfs4_state_start(void) | |
7309 | { | |
7310 | int ret; | |
7311 | ||
51a54568 | 7312 | laundry_wq = alloc_workqueue("%s", WQ_UNBOUND, 0, "nfsd4"); |
a6d6b781 JL |
7313 | if (laundry_wq == NULL) { |
7314 | ret = -ENOMEM; | |
a26dd64f | 7315 | goto out; |
a6d6b781 | 7316 | } |
b5a1a81e BF |
7317 | ret = nfsd4_create_callback_queue(); |
7318 | if (ret) | |
7319 | goto out_free_laundry; | |
09121281 | 7320 | |
c2f1a551 | 7321 | set_max_delegations(); |
b5a1a81e | 7322 | return 0; |
d85ed443 | 7323 | |
b5a1a81e BF |
7324 | out_free_laundry: |
7325 | destroy_workqueue(laundry_wq); | |
a26dd64f | 7326 | out: |
b5a1a81e | 7327 | return ret; |
1da177e4 LT |
7328 | } |
7329 | ||
f252bc68 | 7330 | void |
4dce0ac9 | 7331 | nfs4_state_shutdown_net(struct net *net) |
1da177e4 | 7332 | { |
1da177e4 | 7333 | struct nfs4_delegation *dp = NULL; |
1da177e4 | 7334 | struct list_head *pos, *next, reaplist; |
4dce0ac9 | 7335 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
1da177e4 | 7336 | |
4dce0ac9 SK |
7337 | cancel_delayed_work_sync(&nn->laundromat_work); |
7338 | locks_end_grace(&nn->nfsd4_manager); | |
ac55fdc4 | 7339 | |
1da177e4 | 7340 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 7341 | spin_lock(&state_lock); |
e8c69d17 | 7342 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 | 7343 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
3fcbbd24 | 7344 | WARN_ON(!unhash_delegation_locked(dp)); |
42690676 | 7345 | list_add(&dp->dl_recall_lru, &reaplist); |
1da177e4 | 7346 | } |
cdc97505 | 7347 | spin_unlock(&state_lock); |
1da177e4 LT |
7348 | list_for_each_safe(pos, next, &reaplist) { |
7349 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
42690676 | 7350 | list_del_init(&dp->dl_recall_lru); |
0af6e690 | 7351 | destroy_unhashed_deleg(dp); |
1da177e4 LT |
7352 | } |
7353 | ||
3320fef1 | 7354 | nfsd4_client_tracking_exit(net); |
4dce0ac9 | 7355 | nfs4_state_destroy_net(net); |
1da177e4 LT |
7356 | } |
7357 | ||
7358 | void | |
7359 | nfs4_state_shutdown(void) | |
7360 | { | |
5e8d5c29 | 7361 | destroy_workqueue(laundry_wq); |
c3935e30 | 7362 | nfsd4_destroy_callback_queue(); |
1da177e4 | 7363 | } |
8b70484c TM |
7364 | |
7365 | static void | |
7366 | get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
7367 | { | |
37c593c5 TM |
7368 | if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) |
7369 | memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); | |
8b70484c TM |
7370 | } |
7371 | ||
7372 | static void | |
7373 | put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
7374 | { | |
37c593c5 TM |
7375 | if (cstate->minorversion) { |
7376 | memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); | |
7377 | SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
7378 | } | |
7379 | } | |
7380 | ||
7381 | void | |
7382 | clear_current_stateid(struct nfsd4_compound_state *cstate) | |
7383 | { | |
7384 | CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
8b70484c TM |
7385 | } |
7386 | ||
62cd4a59 TM |
7387 | /* |
7388 | * functions to set current state id | |
7389 | */ | |
9428fe1a | 7390 | void |
b60e9859 CH |
7391 | nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, |
7392 | union nfsd4_op_u *u) | |
9428fe1a | 7393 | { |
b60e9859 | 7394 | put_stateid(cstate, &u->open_downgrade.od_stateid); |
9428fe1a TM |
7395 | } |
7396 | ||
8b70484c | 7397 | void |
b60e9859 CH |
7398 | nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, |
7399 | union nfsd4_op_u *u) | |
8b70484c | 7400 | { |
b60e9859 | 7401 | put_stateid(cstate, &u->open.op_stateid); |
8b70484c TM |
7402 | } |
7403 | ||
62cd4a59 | 7404 | void |
b60e9859 CH |
7405 | nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, |
7406 | union nfsd4_op_u *u) | |
62cd4a59 | 7407 | { |
b60e9859 | 7408 | put_stateid(cstate, &u->close.cl_stateid); |
62cd4a59 TM |
7409 | } |
7410 | ||
7411 | void | |
b60e9859 CH |
7412 | nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, |
7413 | union nfsd4_op_u *u) | |
62cd4a59 | 7414 | { |
b60e9859 | 7415 | put_stateid(cstate, &u->lock.lk_resp_stateid); |
62cd4a59 TM |
7416 | } |
7417 | ||
7418 | /* | |
7419 | * functions to consume current state id | |
7420 | */ | |
1e97b519 | 7421 | |
9428fe1a | 7422 | void |
57832e7b CH |
7423 | nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, |
7424 | union nfsd4_op_u *u) | |
9428fe1a | 7425 | { |
57832e7b | 7426 | get_stateid(cstate, &u->open_downgrade.od_stateid); |
9428fe1a TM |
7427 | } |
7428 | ||
7429 | void | |
57832e7b CH |
7430 | nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, |
7431 | union nfsd4_op_u *u) | |
9428fe1a | 7432 | { |
57832e7b | 7433 | get_stateid(cstate, &u->delegreturn.dr_stateid); |
9428fe1a TM |
7434 | } |
7435 | ||
1e97b519 | 7436 | void |
57832e7b CH |
7437 | nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, |
7438 | union nfsd4_op_u *u) | |
1e97b519 | 7439 | { |
57832e7b | 7440 | get_stateid(cstate, &u->free_stateid.fr_stateid); |
1e97b519 TM |
7441 | } |
7442 | ||
7443 | void | |
57832e7b CH |
7444 | nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, |
7445 | union nfsd4_op_u *u) | |
1e97b519 | 7446 | { |
57832e7b | 7447 | get_stateid(cstate, &u->setattr.sa_stateid); |
1e97b519 TM |
7448 | } |
7449 | ||
8b70484c | 7450 | void |
57832e7b CH |
7451 | nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, |
7452 | union nfsd4_op_u *u) | |
8b70484c | 7453 | { |
57832e7b | 7454 | get_stateid(cstate, &u->close.cl_stateid); |
8b70484c TM |
7455 | } |
7456 | ||
7457 | void | |
57832e7b CH |
7458 | nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, |
7459 | union nfsd4_op_u *u) | |
8b70484c | 7460 | { |
57832e7b | 7461 | get_stateid(cstate, &u->locku.lu_stateid); |
8b70484c | 7462 | } |
30813e27 TM |
7463 | |
7464 | void | |
57832e7b CH |
7465 | nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, |
7466 | union nfsd4_op_u *u) | |
30813e27 | 7467 | { |
57832e7b | 7468 | get_stateid(cstate, &u->read.rd_stateid); |
30813e27 TM |
7469 | } |
7470 | ||
7471 | void | |
57832e7b CH |
7472 | nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, |
7473 | union nfsd4_op_u *u) | |
30813e27 | 7474 | { |
57832e7b | 7475 | get_stateid(cstate, &u->write.wr_stateid); |
30813e27 | 7476 | } |