Commit | Line | Data |
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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (c) 2001 The Regents of the University of Michigan. |
3 | * All rights reserved. | |
4 | * | |
5 | * Kendrick Smith <kmsmith@umich.edu> | |
6 | * Andy Adamson <kandros@umich.edu> | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * | |
12 | * 1. Redistributions of source code must retain the above copyright | |
13 | * notice, this list of conditions and the following disclaimer. | |
14 | * 2. Redistributions in binary form must reproduce the above copyright | |
15 | * notice, this list of conditions and the following disclaimer in the | |
16 | * documentation and/or other materials provided with the distribution. | |
17 | * 3. Neither the name of the University nor the names of its | |
18 | * contributors may be used to endorse or promote products derived | |
19 | * from this software without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
22 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
23 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
24 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
26 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
27 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
28 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
29 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
30 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
31 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
32 | * | |
33 | */ | |
34 | ||
aceaf78d | 35 | #include <linux/file.h> |
b89f4321 | 36 | #include <linux/fs.h> |
5a0e3ad6 | 37 | #include <linux/slab.h> |
0964a3d3 | 38 | #include <linux/namei.h> |
c2f1a551 | 39 | #include <linux/swap.h> |
17456804 | 40 | #include <linux/pagemap.h> |
7df302f7 | 41 | #include <linux/ratelimit.h> |
68e76ad0 | 42 | #include <linux/sunrpc/svcauth_gss.h> |
5976687a | 43 | #include <linux/sunrpc/addr.h> |
87545899 | 44 | #include <linux/jhash.h> |
9a74af21 | 45 | #include "xdr4.h" |
06b332a5 | 46 | #include "xdr4cb.h" |
0a3adade | 47 | #include "vfs.h" |
bfa4b365 | 48 | #include "current_stateid.h" |
1da177e4 | 49 | |
5e1533c7 | 50 | #include "netns.h" |
9cf514cc | 51 | #include "pnfs.h" |
5e1533c7 | 52 | |
1da177e4 LT |
53 | #define NFSDDBG_FACILITY NFSDDBG_PROC |
54 | ||
f32f3c2d BF |
55 | #define all_ones {{~0,~0},~0} |
56 | static const stateid_t one_stateid = { | |
57 | .si_generation = ~0, | |
58 | .si_opaque = all_ones, | |
59 | }; | |
60 | static const stateid_t zero_stateid = { | |
61 | /* all fields zero */ | |
62 | }; | |
19ff0f28 TM |
63 | static const stateid_t currentstateid = { |
64 | .si_generation = 1, | |
65 | }; | |
fb500a7c TM |
66 | static const stateid_t close_stateid = { |
67 | .si_generation = 0xffffffffU, | |
68 | }; | |
f32f3c2d | 69 | |
ec6b5d7b | 70 | static u64 current_sessionid = 1; |
fd39ca9a | 71 | |
f32f3c2d BF |
72 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t))) |
73 | #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t))) | |
19ff0f28 | 74 | #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t))) |
ae254dac | 75 | #define CLOSE_STATEID(stateid) (!memcmp((stateid), &close_stateid, sizeof(stateid_t))) |
1da177e4 | 76 | |
1da177e4 | 77 | /* forward declarations */ |
f9c00c3a | 78 | static bool check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner); |
6011695d | 79 | static void nfs4_free_ol_stateid(struct nfs4_stid *stid); |
1da177e4 | 80 | |
8b671b80 BF |
81 | /* Locking: */ |
82 | ||
8b671b80 BF |
83 | /* |
84 | * Currently used for the del_recall_lru and file hash table. In an | |
85 | * effort to decrease the scope of the client_mutex, this spinlock may | |
86 | * eventually cover more: | |
87 | */ | |
cdc97505 | 88 | static DEFINE_SPINLOCK(state_lock); |
8b671b80 | 89 | |
4f34bd05 AE |
90 | enum nfsd4_st_mutex_lock_subclass { |
91 | OPEN_STATEID_MUTEX = 0, | |
92 | LOCK_STATEID_MUTEX = 1, | |
93 | }; | |
94 | ||
b401be22 JL |
95 | /* |
96 | * A waitqueue for all in-progress 4.0 CLOSE operations that are waiting for | |
97 | * the refcount on the open stateid to drop. | |
98 | */ | |
99 | static DECLARE_WAIT_QUEUE_HEAD(close_wq); | |
100 | ||
9258a2d5 | 101 | static struct kmem_cache *client_slab; |
abf1135b CH |
102 | static struct kmem_cache *openowner_slab; |
103 | static struct kmem_cache *lockowner_slab; | |
104 | static struct kmem_cache *file_slab; | |
105 | static struct kmem_cache *stateid_slab; | |
106 | static struct kmem_cache *deleg_slab; | |
8287f009 | 107 | static struct kmem_cache *odstate_slab; |
e60d4398 | 108 | |
66b2b9b2 | 109 | static void free_session(struct nfsd4_session *); |
508dc6e1 | 110 | |
c4cb8974 | 111 | static const struct nfsd4_callback_ops nfsd4_cb_recall_ops; |
76d348fa | 112 | static const struct nfsd4_callback_ops nfsd4_cb_notify_lock_ops; |
0162ac2b | 113 | |
f0f51f5c | 114 | static bool is_session_dead(struct nfsd4_session *ses) |
66b2b9b2 | 115 | { |
f0f51f5c | 116 | return ses->se_flags & NFS4_SESSION_DEAD; |
66b2b9b2 BF |
117 | } |
118 | ||
f0f51f5c | 119 | static __be32 mark_session_dead_locked(struct nfsd4_session *ses, int ref_held_by_me) |
508dc6e1 | 120 | { |
f0f51f5c | 121 | if (atomic_read(&ses->se_ref) > ref_held_by_me) |
66b2b9b2 BF |
122 | return nfserr_jukebox; |
123 | ses->se_flags |= NFS4_SESSION_DEAD; | |
124 | return nfs_ok; | |
508dc6e1 BH |
125 | } |
126 | ||
221a6876 BF |
127 | static bool is_client_expired(struct nfs4_client *clp) |
128 | { | |
129 | return clp->cl_time == 0; | |
130 | } | |
131 | ||
221a6876 BF |
132 | static __be32 get_client_locked(struct nfs4_client *clp) |
133 | { | |
0a880a28 TM |
134 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
135 | ||
136 | lockdep_assert_held(&nn->client_lock); | |
137 | ||
221a6876 BF |
138 | if (is_client_expired(clp)) |
139 | return nfserr_expired; | |
140 | atomic_inc(&clp->cl_refcount); | |
141 | return nfs_ok; | |
142 | } | |
143 | ||
144 | /* must be called under the client_lock */ | |
145 | static inline void | |
146 | renew_client_locked(struct nfs4_client *clp) | |
147 | { | |
148 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
149 | ||
150 | if (is_client_expired(clp)) { | |
151 | WARN_ON(1); | |
152 | printk("%s: client (clientid %08x/%08x) already expired\n", | |
153 | __func__, | |
154 | clp->cl_clientid.cl_boot, | |
155 | clp->cl_clientid.cl_id); | |
156 | return; | |
157 | } | |
158 | ||
159 | dprintk("renewing client (clientid %08x/%08x)\n", | |
160 | clp->cl_clientid.cl_boot, | |
161 | clp->cl_clientid.cl_id); | |
162 | list_move_tail(&clp->cl_lru, &nn->client_lru); | |
163 | clp->cl_time = get_seconds(); | |
164 | } | |
165 | ||
ba138435 | 166 | static void put_client_renew_locked(struct nfs4_client *clp) |
221a6876 | 167 | { |
0a880a28 TM |
168 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
169 | ||
170 | lockdep_assert_held(&nn->client_lock); | |
171 | ||
221a6876 BF |
172 | if (!atomic_dec_and_test(&clp->cl_refcount)) |
173 | return; | |
174 | if (!is_client_expired(clp)) | |
175 | renew_client_locked(clp); | |
176 | } | |
177 | ||
4b24ca7d JL |
178 | static void put_client_renew(struct nfs4_client *clp) |
179 | { | |
180 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
181 | ||
d6c249b4 JL |
182 | if (!atomic_dec_and_lock(&clp->cl_refcount, &nn->client_lock)) |
183 | return; | |
184 | if (!is_client_expired(clp)) | |
185 | renew_client_locked(clp); | |
4b24ca7d JL |
186 | spin_unlock(&nn->client_lock); |
187 | } | |
188 | ||
d4e19e70 TM |
189 | static __be32 nfsd4_get_session_locked(struct nfsd4_session *ses) |
190 | { | |
191 | __be32 status; | |
192 | ||
193 | if (is_session_dead(ses)) | |
194 | return nfserr_badsession; | |
195 | status = get_client_locked(ses->se_client); | |
196 | if (status) | |
197 | return status; | |
198 | atomic_inc(&ses->se_ref); | |
199 | return nfs_ok; | |
200 | } | |
201 | ||
202 | static void nfsd4_put_session_locked(struct nfsd4_session *ses) | |
203 | { | |
204 | struct nfs4_client *clp = ses->se_client; | |
0a880a28 TM |
205 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
206 | ||
207 | lockdep_assert_held(&nn->client_lock); | |
d4e19e70 TM |
208 | |
209 | if (atomic_dec_and_test(&ses->se_ref) && is_session_dead(ses)) | |
210 | free_session(ses); | |
211 | put_client_renew_locked(clp); | |
212 | } | |
213 | ||
214 | static void nfsd4_put_session(struct nfsd4_session *ses) | |
215 | { | |
216 | struct nfs4_client *clp = ses->se_client; | |
217 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
218 | ||
219 | spin_lock(&nn->client_lock); | |
220 | nfsd4_put_session_locked(ses); | |
221 | spin_unlock(&nn->client_lock); | |
222 | } | |
223 | ||
76d348fa JL |
224 | static struct nfsd4_blocked_lock * |
225 | find_blocked_lock(struct nfs4_lockowner *lo, struct knfsd_fh *fh, | |
226 | struct nfsd_net *nn) | |
227 | { | |
228 | struct nfsd4_blocked_lock *cur, *found = NULL; | |
229 | ||
0cc11a61 | 230 | spin_lock(&nn->blocked_locks_lock); |
76d348fa JL |
231 | list_for_each_entry(cur, &lo->lo_blocked, nbl_list) { |
232 | if (fh_match(fh, &cur->nbl_fh)) { | |
233 | list_del_init(&cur->nbl_list); | |
7919d0a2 | 234 | list_del_init(&cur->nbl_lru); |
76d348fa JL |
235 | found = cur; |
236 | break; | |
237 | } | |
238 | } | |
0cc11a61 | 239 | spin_unlock(&nn->blocked_locks_lock); |
76d348fa | 240 | if (found) |
cb03f94f | 241 | locks_delete_block(&found->nbl_lock); |
76d348fa JL |
242 | return found; |
243 | } | |
244 | ||
245 | static struct nfsd4_blocked_lock * | |
246 | find_or_allocate_block(struct nfs4_lockowner *lo, struct knfsd_fh *fh, | |
247 | struct nfsd_net *nn) | |
248 | { | |
249 | struct nfsd4_blocked_lock *nbl; | |
250 | ||
251 | nbl = find_blocked_lock(lo, fh, nn); | |
252 | if (!nbl) { | |
253 | nbl= kmalloc(sizeof(*nbl), GFP_KERNEL); | |
254 | if (nbl) { | |
255 | fh_copy_shallow(&nbl->nbl_fh, fh); | |
256 | locks_init_lock(&nbl->nbl_lock); | |
257 | nfsd4_init_cb(&nbl->nbl_cb, lo->lo_owner.so_client, | |
258 | &nfsd4_cb_notify_lock_ops, | |
259 | NFSPROC4_CLNT_CB_NOTIFY_LOCK); | |
260 | } | |
261 | } | |
262 | return nbl; | |
263 | } | |
264 | ||
265 | static void | |
266 | free_blocked_lock(struct nfsd4_blocked_lock *nbl) | |
267 | { | |
6aaafc43 | 268 | locks_delete_block(&nbl->nbl_lock); |
76d348fa JL |
269 | locks_release_private(&nbl->nbl_lock); |
270 | kfree(nbl); | |
271 | } | |
272 | ||
68ef3bc3 JL |
273 | static void |
274 | remove_blocked_locks(struct nfs4_lockowner *lo) | |
275 | { | |
276 | struct nfs4_client *clp = lo->lo_owner.so_client; | |
277 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
278 | struct nfsd4_blocked_lock *nbl; | |
279 | LIST_HEAD(reaplist); | |
280 | ||
281 | /* Dequeue all blocked locks */ | |
282 | spin_lock(&nn->blocked_locks_lock); | |
283 | while (!list_empty(&lo->lo_blocked)) { | |
284 | nbl = list_first_entry(&lo->lo_blocked, | |
285 | struct nfsd4_blocked_lock, | |
286 | nbl_list); | |
287 | list_del_init(&nbl->nbl_list); | |
288 | list_move(&nbl->nbl_lru, &reaplist); | |
289 | } | |
290 | spin_unlock(&nn->blocked_locks_lock); | |
291 | ||
292 | /* Now free them */ | |
293 | while (!list_empty(&reaplist)) { | |
294 | nbl = list_first_entry(&reaplist, struct nfsd4_blocked_lock, | |
295 | nbl_lru); | |
296 | list_del_init(&nbl->nbl_lru); | |
68ef3bc3 JL |
297 | free_blocked_lock(nbl); |
298 | } | |
299 | } | |
300 | ||
76d348fa JL |
301 | static int |
302 | nfsd4_cb_notify_lock_done(struct nfsd4_callback *cb, struct rpc_task *task) | |
303 | { | |
304 | /* | |
305 | * Since this is just an optimization, we don't try very hard if it | |
306 | * turns out not to succeed. We'll requeue it on NFS4ERR_DELAY, and | |
307 | * just quit trying on anything else. | |
308 | */ | |
309 | switch (task->tk_status) { | |
310 | case -NFS4ERR_DELAY: | |
311 | rpc_delay(task, 1 * HZ); | |
312 | return 0; | |
313 | default: | |
314 | return 1; | |
315 | } | |
316 | } | |
317 | ||
318 | static void | |
319 | nfsd4_cb_notify_lock_release(struct nfsd4_callback *cb) | |
320 | { | |
321 | struct nfsd4_blocked_lock *nbl = container_of(cb, | |
322 | struct nfsd4_blocked_lock, nbl_cb); | |
323 | ||
324 | free_blocked_lock(nbl); | |
325 | } | |
326 | ||
327 | static const struct nfsd4_callback_ops nfsd4_cb_notify_lock_ops = { | |
328 | .done = nfsd4_cb_notify_lock_done, | |
329 | .release = nfsd4_cb_notify_lock_release, | |
330 | }; | |
331 | ||
b5971afa KM |
332 | static inline struct nfs4_stateowner * |
333 | nfs4_get_stateowner(struct nfs4_stateowner *sop) | |
334 | { | |
335 | atomic_inc(&sop->so_count); | |
336 | return sop; | |
337 | } | |
338 | ||
7ffb5880 | 339 | static int |
d4f0489f | 340 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner) |
7ffb5880 TM |
341 | { |
342 | return (sop->so_owner.len == owner->len) && | |
d4f0489f | 343 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len); |
7ffb5880 TM |
344 | } |
345 | ||
346 | static struct nfs4_openowner * | |
347 | find_openstateowner_str_locked(unsigned int hashval, struct nfsd4_open *open, | |
d4f0489f | 348 | struct nfs4_client *clp) |
7ffb5880 TM |
349 | { |
350 | struct nfs4_stateowner *so; | |
7ffb5880 | 351 | |
d4f0489f | 352 | lockdep_assert_held(&clp->cl_lock); |
7ffb5880 | 353 | |
d4f0489f TM |
354 | list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[hashval], |
355 | so_strhash) { | |
7ffb5880 TM |
356 | if (!so->so_is_open_owner) |
357 | continue; | |
b5971afa KM |
358 | if (same_owner_str(so, &open->op_owner)) |
359 | return openowner(nfs4_get_stateowner(so)); | |
7ffb5880 TM |
360 | } |
361 | return NULL; | |
362 | } | |
363 | ||
364 | static struct nfs4_openowner * | |
365 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, | |
d4f0489f | 366 | struct nfs4_client *clp) |
7ffb5880 TM |
367 | { |
368 | struct nfs4_openowner *oo; | |
369 | ||
d4f0489f TM |
370 | spin_lock(&clp->cl_lock); |
371 | oo = find_openstateowner_str_locked(hashval, open, clp); | |
372 | spin_unlock(&clp->cl_lock); | |
7ffb5880 TM |
373 | return oo; |
374 | } | |
375 | ||
1da177e4 LT |
376 | static inline u32 |
377 | opaque_hashval(const void *ptr, int nbytes) | |
378 | { | |
379 | unsigned char *cptr = (unsigned char *) ptr; | |
380 | ||
381 | u32 x = 0; | |
382 | while (nbytes--) { | |
383 | x *= 37; | |
384 | x += *cptr++; | |
385 | } | |
386 | return x; | |
387 | } | |
388 | ||
5b095e99 | 389 | static void nfsd4_free_file_rcu(struct rcu_head *rcu) |
32513b40 | 390 | { |
5b095e99 JL |
391 | struct nfs4_file *fp = container_of(rcu, struct nfs4_file, fi_rcu); |
392 | ||
393 | kmem_cache_free(file_slab, fp); | |
32513b40 BF |
394 | } |
395 | ||
e6ba76e1 | 396 | void |
13cd2184 N |
397 | put_nfs4_file(struct nfs4_file *fi) |
398 | { | |
02e1215f JL |
399 | might_lock(&state_lock); |
400 | ||
818a34eb | 401 | if (refcount_dec_and_lock(&fi->fi_ref, &state_lock)) { |
5b095e99 | 402 | hlist_del_rcu(&fi->fi_hash); |
cdc97505 | 403 | spin_unlock(&state_lock); |
8287f009 | 404 | WARN_ON_ONCE(!list_empty(&fi->fi_clnt_odstate)); |
5b095e99 JL |
405 | WARN_ON_ONCE(!list_empty(&fi->fi_delegations)); |
406 | call_rcu(&fi->fi_rcu, nfsd4_free_file_rcu); | |
8b671b80 | 407 | } |
13cd2184 N |
408 | } |
409 | ||
de18643d TM |
410 | static struct file * |
411 | __nfs4_get_fd(struct nfs4_file *f, int oflag) | |
412 | { | |
413 | if (f->fi_fds[oflag]) | |
414 | return get_file(f->fi_fds[oflag]); | |
415 | return NULL; | |
416 | } | |
417 | ||
418 | static struct file * | |
419 | find_writeable_file_locked(struct nfs4_file *f) | |
420 | { | |
421 | struct file *ret; | |
422 | ||
423 | lockdep_assert_held(&f->fi_lock); | |
424 | ||
425 | ret = __nfs4_get_fd(f, O_WRONLY); | |
426 | if (!ret) | |
427 | ret = __nfs4_get_fd(f, O_RDWR); | |
428 | return ret; | |
429 | } | |
430 | ||
431 | static struct file * | |
432 | find_writeable_file(struct nfs4_file *f) | |
433 | { | |
434 | struct file *ret; | |
435 | ||
436 | spin_lock(&f->fi_lock); | |
437 | ret = find_writeable_file_locked(f); | |
438 | spin_unlock(&f->fi_lock); | |
439 | ||
440 | return ret; | |
441 | } | |
442 | ||
443 | static struct file *find_readable_file_locked(struct nfs4_file *f) | |
444 | { | |
445 | struct file *ret; | |
446 | ||
447 | lockdep_assert_held(&f->fi_lock); | |
448 | ||
449 | ret = __nfs4_get_fd(f, O_RDONLY); | |
450 | if (!ret) | |
451 | ret = __nfs4_get_fd(f, O_RDWR); | |
452 | return ret; | |
453 | } | |
454 | ||
455 | static struct file * | |
456 | find_readable_file(struct nfs4_file *f) | |
457 | { | |
458 | struct file *ret; | |
459 | ||
460 | spin_lock(&f->fi_lock); | |
461 | ret = find_readable_file_locked(f); | |
462 | spin_unlock(&f->fi_lock); | |
463 | ||
464 | return ret; | |
465 | } | |
466 | ||
4d227fca | 467 | struct file * |
de18643d TM |
468 | find_any_file(struct nfs4_file *f) |
469 | { | |
470 | struct file *ret; | |
471 | ||
472 | spin_lock(&f->fi_lock); | |
473 | ret = __nfs4_get_fd(f, O_RDWR); | |
474 | if (!ret) { | |
475 | ret = __nfs4_get_fd(f, O_WRONLY); | |
476 | if (!ret) | |
477 | ret = __nfs4_get_fd(f, O_RDONLY); | |
478 | } | |
479 | spin_unlock(&f->fi_lock); | |
480 | return ret; | |
481 | } | |
482 | ||
02a3508d | 483 | static atomic_long_t num_delegations; |
697ce9be | 484 | unsigned long max_delegations; |
ef0f3390 N |
485 | |
486 | /* | |
487 | * Open owner state (share locks) | |
488 | */ | |
489 | ||
16bfdaaf BF |
490 | /* hash tables for lock and open owners */ |
491 | #define OWNER_HASH_BITS 8 | |
492 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
493 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
ef0f3390 | 494 | |
d4f0489f | 495 | static unsigned int ownerstr_hashval(struct xdr_netobj *ownername) |
ddc04c41 BF |
496 | { |
497 | unsigned int ret; | |
498 | ||
499 | ret = opaque_hashval(ownername->data, ownername->len); | |
16bfdaaf | 500 | return ret & OWNER_HASH_MASK; |
ddc04c41 | 501 | } |
ef0f3390 | 502 | |
ef0f3390 N |
503 | /* hash table for nfs4_file */ |
504 | #define FILE_HASH_BITS 8 | |
505 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
35079582 | 506 | |
ca943217 | 507 | static unsigned int nfsd_fh_hashval(struct knfsd_fh *fh) |
ddc04c41 | 508 | { |
ca943217 TM |
509 | return jhash2(fh->fh_base.fh_pad, XDR_QUADLEN(fh->fh_size), 0); |
510 | } | |
511 | ||
512 | static unsigned int file_hashval(struct knfsd_fh *fh) | |
513 | { | |
514 | return nfsd_fh_hashval(fh) & (FILE_HASH_SIZE - 1); | |
515 | } | |
516 | ||
89876f8c | 517 | static struct hlist_head file_hashtbl[FILE_HASH_SIZE]; |
ef0f3390 | 518 | |
12659651 JL |
519 | static void |
520 | __nfs4_file_get_access(struct nfs4_file *fp, u32 access) | |
3477565e | 521 | { |
7214e860 JL |
522 | lockdep_assert_held(&fp->fi_lock); |
523 | ||
12659651 JL |
524 | if (access & NFS4_SHARE_ACCESS_WRITE) |
525 | atomic_inc(&fp->fi_access[O_WRONLY]); | |
526 | if (access & NFS4_SHARE_ACCESS_READ) | |
527 | atomic_inc(&fp->fi_access[O_RDONLY]); | |
3477565e BF |
528 | } |
529 | ||
12659651 JL |
530 | static __be32 |
531 | nfs4_file_get_access(struct nfs4_file *fp, u32 access) | |
998db52c | 532 | { |
7214e860 JL |
533 | lockdep_assert_held(&fp->fi_lock); |
534 | ||
12659651 JL |
535 | /* Does this access mode make sense? */ |
536 | if (access & ~NFS4_SHARE_ACCESS_BOTH) | |
537 | return nfserr_inval; | |
538 | ||
baeb4ff0 JL |
539 | /* Does it conflict with a deny mode already set? */ |
540 | if ((access & fp->fi_share_deny) != 0) | |
541 | return nfserr_share_denied; | |
542 | ||
12659651 JL |
543 | __nfs4_file_get_access(fp, access); |
544 | return nfs_ok; | |
998db52c BF |
545 | } |
546 | ||
baeb4ff0 JL |
547 | static __be32 nfs4_file_check_deny(struct nfs4_file *fp, u32 deny) |
548 | { | |
549 | /* Common case is that there is no deny mode. */ | |
550 | if (deny) { | |
551 | /* Does this deny mode make sense? */ | |
552 | if (deny & ~NFS4_SHARE_DENY_BOTH) | |
553 | return nfserr_inval; | |
554 | ||
555 | if ((deny & NFS4_SHARE_DENY_READ) && | |
556 | atomic_read(&fp->fi_access[O_RDONLY])) | |
557 | return nfserr_share_denied; | |
558 | ||
559 | if ((deny & NFS4_SHARE_DENY_WRITE) && | |
560 | atomic_read(&fp->fi_access[O_WRONLY])) | |
561 | return nfserr_share_denied; | |
562 | } | |
563 | return nfs_ok; | |
564 | } | |
565 | ||
998db52c | 566 | static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
f9d7562f | 567 | { |
de18643d TM |
568 | might_lock(&fp->fi_lock); |
569 | ||
570 | if (atomic_dec_and_lock(&fp->fi_access[oflag], &fp->fi_lock)) { | |
571 | struct file *f1 = NULL; | |
572 | struct file *f2 = NULL; | |
573 | ||
6d338b51 | 574 | swap(f1, fp->fi_fds[oflag]); |
0c7c3e67 | 575 | if (atomic_read(&fp->fi_access[1 - oflag]) == 0) |
6d338b51 | 576 | swap(f2, fp->fi_fds[O_RDWR]); |
de18643d TM |
577 | spin_unlock(&fp->fi_lock); |
578 | if (f1) | |
579 | fput(f1); | |
580 | if (f2) | |
581 | fput(f2); | |
f9d7562f BF |
582 | } |
583 | } | |
584 | ||
12659651 | 585 | static void nfs4_file_put_access(struct nfs4_file *fp, u32 access) |
998db52c | 586 | { |
12659651 JL |
587 | WARN_ON_ONCE(access & ~NFS4_SHARE_ACCESS_BOTH); |
588 | ||
589 | if (access & NFS4_SHARE_ACCESS_WRITE) | |
998db52c | 590 | __nfs4_file_put_access(fp, O_WRONLY); |
12659651 JL |
591 | if (access & NFS4_SHARE_ACCESS_READ) |
592 | __nfs4_file_put_access(fp, O_RDONLY); | |
998db52c BF |
593 | } |
594 | ||
8287f009 SB |
595 | /* |
596 | * Allocate a new open/delegation state counter. This is needed for | |
597 | * pNFS for proper return on close semantics. | |
598 | * | |
599 | * Note that we only allocate it for pNFS-enabled exports, otherwise | |
600 | * all pointers to struct nfs4_clnt_odstate are always NULL. | |
601 | */ | |
602 | static struct nfs4_clnt_odstate * | |
603 | alloc_clnt_odstate(struct nfs4_client *clp) | |
604 | { | |
605 | struct nfs4_clnt_odstate *co; | |
606 | ||
607 | co = kmem_cache_zalloc(odstate_slab, GFP_KERNEL); | |
608 | if (co) { | |
609 | co->co_client = clp; | |
cff7cb2e | 610 | refcount_set(&co->co_odcount, 1); |
8287f009 SB |
611 | } |
612 | return co; | |
613 | } | |
614 | ||
615 | static void | |
616 | hash_clnt_odstate_locked(struct nfs4_clnt_odstate *co) | |
617 | { | |
618 | struct nfs4_file *fp = co->co_file; | |
619 | ||
620 | lockdep_assert_held(&fp->fi_lock); | |
621 | list_add(&co->co_perfile, &fp->fi_clnt_odstate); | |
622 | } | |
623 | ||
624 | static inline void | |
625 | get_clnt_odstate(struct nfs4_clnt_odstate *co) | |
626 | { | |
627 | if (co) | |
cff7cb2e | 628 | refcount_inc(&co->co_odcount); |
8287f009 SB |
629 | } |
630 | ||
631 | static void | |
632 | put_clnt_odstate(struct nfs4_clnt_odstate *co) | |
633 | { | |
634 | struct nfs4_file *fp; | |
635 | ||
636 | if (!co) | |
637 | return; | |
638 | ||
639 | fp = co->co_file; | |
cff7cb2e | 640 | if (refcount_dec_and_lock(&co->co_odcount, &fp->fi_lock)) { |
8287f009 SB |
641 | list_del(&co->co_perfile); |
642 | spin_unlock(&fp->fi_lock); | |
643 | ||
644 | nfsd4_return_all_file_layouts(co->co_client, fp); | |
645 | kmem_cache_free(odstate_slab, co); | |
646 | } | |
647 | } | |
648 | ||
649 | static struct nfs4_clnt_odstate * | |
650 | find_or_hash_clnt_odstate(struct nfs4_file *fp, struct nfs4_clnt_odstate *new) | |
651 | { | |
652 | struct nfs4_clnt_odstate *co; | |
653 | struct nfs4_client *cl; | |
654 | ||
655 | if (!new) | |
656 | return NULL; | |
657 | ||
658 | cl = new->co_client; | |
659 | ||
660 | spin_lock(&fp->fi_lock); | |
661 | list_for_each_entry(co, &fp->fi_clnt_odstate, co_perfile) { | |
662 | if (co->co_client == cl) { | |
663 | get_clnt_odstate(co); | |
664 | goto out; | |
665 | } | |
666 | } | |
667 | co = new; | |
668 | co->co_file = fp; | |
669 | hash_clnt_odstate_locked(new); | |
670 | out: | |
671 | spin_unlock(&fp->fi_lock); | |
672 | return co; | |
673 | } | |
674 | ||
d19fb70d KM |
675 | struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct kmem_cache *slab, |
676 | void (*sc_free)(struct nfs4_stid *)) | |
2a74aba7 | 677 | { |
3abdb607 | 678 | struct nfs4_stid *stid; |
6136d2b4 | 679 | int new_id; |
2a74aba7 | 680 | |
f8338834 | 681 | stid = kmem_cache_zalloc(slab, GFP_KERNEL); |
3abdb607 BF |
682 | if (!stid) |
683 | return NULL; | |
684 | ||
4770d722 JL |
685 | idr_preload(GFP_KERNEL); |
686 | spin_lock(&cl->cl_lock); | |
687 | new_id = idr_alloc_cyclic(&cl->cl_stateids, stid, 0, 0, GFP_NOWAIT); | |
688 | spin_unlock(&cl->cl_lock); | |
689 | idr_preload_end(); | |
ebd6c707 | 690 | if (new_id < 0) |
3abdb607 | 691 | goto out_free; |
d19fb70d KM |
692 | |
693 | stid->sc_free = sc_free; | |
2a74aba7 | 694 | stid->sc_client = cl; |
3abdb607 BF |
695 | stid->sc_stateid.si_opaque.so_id = new_id; |
696 | stid->sc_stateid.si_opaque.so_clid = cl->cl_clientid; | |
2a74aba7 | 697 | /* Will be incremented before return to client: */ |
a15dfcd5 | 698 | refcount_set(&stid->sc_count, 1); |
9767feb2 | 699 | spin_lock_init(&stid->sc_lock); |
996e0938 | 700 | |
996e0938 | 701 | /* |
3abdb607 BF |
702 | * It shouldn't be a problem to reuse an opaque stateid value. |
703 | * I don't think it is for 4.1. But with 4.0 I worry that, for | |
704 | * example, a stray write retransmission could be accepted by | |
705 | * the server when it should have been rejected. Therefore, | |
706 | * adopt a trick from the sctp code to attempt to maximize the | |
707 | * amount of time until an id is reused, by ensuring they always | |
708 | * "increase" (mod INT_MAX): | |
996e0938 | 709 | */ |
3abdb607 BF |
710 | return stid; |
711 | out_free: | |
2c44a234 | 712 | kmem_cache_free(slab, stid); |
3abdb607 | 713 | return NULL; |
2a74aba7 BF |
714 | } |
715 | ||
e0639dc5 OK |
716 | /* |
717 | * Create a unique stateid_t to represent each COPY. | |
718 | */ | |
719 | int nfs4_init_cp_state(struct nfsd_net *nn, struct nfsd4_copy *copy) | |
720 | { | |
721 | int new_id; | |
722 | ||
723 | idr_preload(GFP_KERNEL); | |
724 | spin_lock(&nn->s2s_cp_lock); | |
725 | new_id = idr_alloc_cyclic(&nn->s2s_cp_stateids, copy, 0, 0, GFP_NOWAIT); | |
726 | spin_unlock(&nn->s2s_cp_lock); | |
727 | idr_preload_end(); | |
728 | if (new_id < 0) | |
729 | return 0; | |
730 | copy->cp_stateid.si_opaque.so_id = new_id; | |
731 | copy->cp_stateid.si_opaque.so_clid.cl_boot = nn->boot_time; | |
732 | copy->cp_stateid.si_opaque.so_clid.cl_id = nn->s2s_cp_cl_id; | |
733 | return 1; | |
734 | } | |
735 | ||
736 | void nfs4_free_cp_state(struct nfsd4_copy *copy) | |
737 | { | |
738 | struct nfsd_net *nn; | |
739 | ||
740 | nn = net_generic(copy->cp_clp->net, nfsd_net_id); | |
741 | spin_lock(&nn->s2s_cp_lock); | |
742 | idr_remove(&nn->s2s_cp_stateids, copy->cp_stateid.si_opaque.so_id); | |
743 | spin_unlock(&nn->s2s_cp_lock); | |
744 | } | |
745 | ||
b49e084d | 746 | static struct nfs4_ol_stateid * nfs4_alloc_open_stateid(struct nfs4_client *clp) |
4cdc951b | 747 | { |
6011695d | 748 | struct nfs4_stid *stid; |
6011695d | 749 | |
d19fb70d | 750 | stid = nfs4_alloc_stid(clp, stateid_slab, nfs4_free_ol_stateid); |
6011695d TM |
751 | if (!stid) |
752 | return NULL; | |
753 | ||
d19fb70d | 754 | return openlockstateid(stid); |
6011695d TM |
755 | } |
756 | ||
757 | static void nfs4_free_deleg(struct nfs4_stid *stid) | |
758 | { | |
6011695d TM |
759 | kmem_cache_free(deleg_slab, stid); |
760 | atomic_long_dec(&num_delegations); | |
4cdc951b BF |
761 | } |
762 | ||
6282cd56 N |
763 | /* |
764 | * When we recall a delegation, we should be careful not to hand it | |
765 | * out again straight away. | |
766 | * To ensure this we keep a pair of bloom filters ('new' and 'old') | |
767 | * in which the filehandles of recalled delegations are "stored". | |
768 | * If a filehandle appear in either filter, a delegation is blocked. | |
769 | * When a delegation is recalled, the filehandle is stored in the "new" | |
770 | * filter. | |
771 | * Every 30 seconds we swap the filters and clear the "new" one, | |
772 | * unless both are empty of course. | |
773 | * | |
774 | * Each filter is 256 bits. We hash the filehandle to 32bit and use the | |
775 | * low 3 bytes as hash-table indices. | |
776 | * | |
f54fe962 | 777 | * 'blocked_delegations_lock', which is always taken in block_delegations(), |
6282cd56 N |
778 | * is used to manage concurrent access. Testing does not need the lock |
779 | * except when swapping the two filters. | |
780 | */ | |
f54fe962 | 781 | static DEFINE_SPINLOCK(blocked_delegations_lock); |
6282cd56 N |
782 | static struct bloom_pair { |
783 | int entries, old_entries; | |
784 | time_t swap_time; | |
785 | int new; /* index into 'set' */ | |
786 | DECLARE_BITMAP(set[2], 256); | |
787 | } blocked_delegations; | |
788 | ||
789 | static int delegation_blocked(struct knfsd_fh *fh) | |
790 | { | |
791 | u32 hash; | |
792 | struct bloom_pair *bd = &blocked_delegations; | |
793 | ||
794 | if (bd->entries == 0) | |
795 | return 0; | |
796 | if (seconds_since_boot() - bd->swap_time > 30) { | |
f54fe962 | 797 | spin_lock(&blocked_delegations_lock); |
6282cd56 N |
798 | if (seconds_since_boot() - bd->swap_time > 30) { |
799 | bd->entries -= bd->old_entries; | |
800 | bd->old_entries = bd->entries; | |
801 | memset(bd->set[bd->new], 0, | |
802 | sizeof(bd->set[0])); | |
803 | bd->new = 1-bd->new; | |
804 | bd->swap_time = seconds_since_boot(); | |
805 | } | |
f54fe962 | 806 | spin_unlock(&blocked_delegations_lock); |
6282cd56 | 807 | } |
87545899 | 808 | hash = jhash(&fh->fh_base, fh->fh_size, 0); |
6282cd56 N |
809 | if (test_bit(hash&255, bd->set[0]) && |
810 | test_bit((hash>>8)&255, bd->set[0]) && | |
811 | test_bit((hash>>16)&255, bd->set[0])) | |
812 | return 1; | |
813 | ||
814 | if (test_bit(hash&255, bd->set[1]) && | |
815 | test_bit((hash>>8)&255, bd->set[1]) && | |
816 | test_bit((hash>>16)&255, bd->set[1])) | |
817 | return 1; | |
818 | ||
819 | return 0; | |
820 | } | |
821 | ||
822 | static void block_delegations(struct knfsd_fh *fh) | |
823 | { | |
824 | u32 hash; | |
825 | struct bloom_pair *bd = &blocked_delegations; | |
826 | ||
87545899 | 827 | hash = jhash(&fh->fh_base, fh->fh_size, 0); |
6282cd56 | 828 | |
f54fe962 | 829 | spin_lock(&blocked_delegations_lock); |
6282cd56 N |
830 | __set_bit(hash&255, bd->set[bd->new]); |
831 | __set_bit((hash>>8)&255, bd->set[bd->new]); | |
832 | __set_bit((hash>>16)&255, bd->set[bd->new]); | |
833 | if (bd->entries == 0) | |
834 | bd->swap_time = seconds_since_boot(); | |
835 | bd->entries += 1; | |
f54fe962 | 836 | spin_unlock(&blocked_delegations_lock); |
6282cd56 N |
837 | } |
838 | ||
1da177e4 | 839 | static struct nfs4_delegation * |
86d29b10 BF |
840 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_file *fp, |
841 | struct svc_fh *current_fh, | |
8287f009 | 842 | struct nfs4_clnt_odstate *odstate) |
1da177e4 LT |
843 | { |
844 | struct nfs4_delegation *dp; | |
02a3508d | 845 | long n; |
1da177e4 LT |
846 | |
847 | dprintk("NFSD alloc_init_deleg\n"); | |
02a3508d TM |
848 | n = atomic_long_inc_return(&num_delegations); |
849 | if (n < 0 || n > max_delegations) | |
850 | goto out_dec; | |
6282cd56 | 851 | if (delegation_blocked(¤t_fh->fh_handle)) |
02a3508d | 852 | goto out_dec; |
d19fb70d | 853 | dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab, nfs4_free_deleg)); |
5b2d21c1 | 854 | if (dp == NULL) |
02a3508d | 855 | goto out_dec; |
6011695d | 856 | |
2a74aba7 BF |
857 | /* |
858 | * delegation seqid's are never incremented. The 4.1 special | |
6136d2b4 BF |
859 | * meaning of seqid 0 isn't meaningful, really, but let's avoid |
860 | * 0 anyway just for consistency and use 1: | |
2a74aba7 BF |
861 | */ |
862 | dp->dl_stid.sc_stateid.si_generation = 1; | |
ea1da636 N |
863 | INIT_LIST_HEAD(&dp->dl_perfile); |
864 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 | 865 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
8287f009 SB |
866 | dp->dl_clnt_odstate = odstate; |
867 | get_clnt_odstate(odstate); | |
99c41515 | 868 | dp->dl_type = NFS4_OPEN_DELEGATE_READ; |
f0b5de1b CH |
869 | dp->dl_retries = 1; |
870 | nfsd4_init_cb(&dp->dl_recall, dp->dl_stid.sc_client, | |
0162ac2b | 871 | &nfsd4_cb_recall_ops, NFSPROC4_CLNT_CB_RECALL); |
86d29b10 BF |
872 | get_nfs4_file(fp); |
873 | dp->dl_stid.sc_file = fp; | |
1da177e4 | 874 | return dp; |
02a3508d TM |
875 | out_dec: |
876 | atomic_long_dec(&num_delegations); | |
877 | return NULL; | |
1da177e4 LT |
878 | } |
879 | ||
880 | void | |
6011695d | 881 | nfs4_put_stid(struct nfs4_stid *s) |
1da177e4 | 882 | { |
11b9164a | 883 | struct nfs4_file *fp = s->sc_file; |
6011695d TM |
884 | struct nfs4_client *clp = s->sc_client; |
885 | ||
4770d722 JL |
886 | might_lock(&clp->cl_lock); |
887 | ||
a15dfcd5 | 888 | if (!refcount_dec_and_lock(&s->sc_count, &clp->cl_lock)) { |
b401be22 | 889 | wake_up_all(&close_wq); |
6011695d | 890 | return; |
b401be22 | 891 | } |
6011695d | 892 | idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id); |
4770d722 | 893 | spin_unlock(&clp->cl_lock); |
6011695d | 894 | s->sc_free(s); |
11b9164a TM |
895 | if (fp) |
896 | put_nfs4_file(fp); | |
1da177e4 LT |
897 | } |
898 | ||
9767feb2 JL |
899 | void |
900 | nfs4_inc_and_copy_stateid(stateid_t *dst, struct nfs4_stid *stid) | |
901 | { | |
902 | stateid_t *src = &stid->sc_stateid; | |
903 | ||
904 | spin_lock(&stid->sc_lock); | |
905 | if (unlikely(++src->si_generation == 0)) | |
906 | src->si_generation = 1; | |
907 | memcpy(dst, src, sizeof(*dst)); | |
908 | spin_unlock(&stid->sc_lock); | |
909 | } | |
910 | ||
353601e7 | 911 | static void put_deleg_file(struct nfs4_file *fp) |
1da177e4 | 912 | { |
6bcc034e | 913 | struct file *filp = NULL; |
b8232d33 | 914 | |
6bcc034e | 915 | spin_lock(&fp->fi_lock); |
353601e7 | 916 | if (--fp->fi_delegees == 0) |
6bcc034e | 917 | swap(filp, fp->fi_deleg_file); |
6bcc034e JL |
918 | spin_unlock(&fp->fi_lock); |
919 | ||
353601e7 | 920 | if (filp) |
6bcc034e | 921 | fput(filp); |
353601e7 BF |
922 | } |
923 | ||
924 | static void nfs4_unlock_deleg_lease(struct nfs4_delegation *dp) | |
925 | { | |
926 | struct nfs4_file *fp = dp->dl_stid.sc_file; | |
927 | struct file *filp = fp->fi_deleg_file; | |
928 | ||
929 | WARN_ON_ONCE(!fp->fi_delegees); | |
930 | ||
931 | vfs_setlease(filp, F_UNLCK, NULL, (void **)&dp); | |
932 | put_deleg_file(fp); | |
1da177e4 LT |
933 | } |
934 | ||
0af6e690 BF |
935 | static void destroy_unhashed_deleg(struct nfs4_delegation *dp) |
936 | { | |
937 | put_clnt_odstate(dp->dl_clnt_odstate); | |
353601e7 | 938 | nfs4_unlock_deleg_lease(dp); |
0af6e690 BF |
939 | nfs4_put_stid(&dp->dl_stid); |
940 | } | |
941 | ||
cd61c522 | 942 | void nfs4_unhash_stid(struct nfs4_stid *s) |
6136d2b4 | 943 | { |
3abdb607 | 944 | s->sc_type = 0; |
6136d2b4 BF |
945 | } |
946 | ||
34ed9872 | 947 | /** |
68b18f52 | 948 | * nfs4_delegation_exists - Discover if this delegation already exists |
34ed9872 AE |
949 | * @clp: a pointer to the nfs4_client we're granting a delegation to |
950 | * @fp: a pointer to the nfs4_file we're granting a delegation on | |
951 | * | |
952 | * Return: | |
68b18f52 | 953 | * On success: true iff an existing delegation is found |
34ed9872 AE |
954 | */ |
955 | ||
68b18f52 BF |
956 | static bool |
957 | nfs4_delegation_exists(struct nfs4_client *clp, struct nfs4_file *fp) | |
34ed9872 AE |
958 | { |
959 | struct nfs4_delegation *searchdp = NULL; | |
960 | struct nfs4_client *searchclp = NULL; | |
961 | ||
962 | lockdep_assert_held(&state_lock); | |
963 | lockdep_assert_held(&fp->fi_lock); | |
964 | ||
965 | list_for_each_entry(searchdp, &fp->fi_delegations, dl_perfile) { | |
966 | searchclp = searchdp->dl_stid.sc_client; | |
967 | if (clp == searchclp) { | |
51d87bc2 | 968 | return true; |
34ed9872 AE |
969 | } |
970 | } | |
51d87bc2 | 971 | return false; |
34ed9872 AE |
972 | } |
973 | ||
974 | /** | |
975 | * hash_delegation_locked - Add a delegation to the appropriate lists | |
976 | * @dp: a pointer to the nfs4_delegation we are adding. | |
977 | * @fp: a pointer to the nfs4_file we're granting a delegation on | |
978 | * | |
979 | * Return: | |
980 | * On success: NULL if the delegation was successfully hashed. | |
981 | * | |
982 | * On error: -EAGAIN if one was previously granted to this | |
983 | * nfs4_client for this nfs4_file. Delegation is not hashed. | |
984 | * | |
985 | */ | |
986 | ||
987 | static int | |
931ee56c BH |
988 | hash_delegation_locked(struct nfs4_delegation *dp, struct nfs4_file *fp) |
989 | { | |
34ed9872 AE |
990 | struct nfs4_client *clp = dp->dl_stid.sc_client; |
991 | ||
cdc97505 | 992 | lockdep_assert_held(&state_lock); |
417c6629 | 993 | lockdep_assert_held(&fp->fi_lock); |
931ee56c | 994 | |
68b18f52 BF |
995 | if (nfs4_delegation_exists(clp, fp)) |
996 | return -EAGAIN; | |
a15dfcd5 | 997 | refcount_inc(&dp->dl_stid.sc_count); |
3fb87d13 | 998 | dp->dl_stid.sc_type = NFS4_DELEG_STID; |
931ee56c | 999 | list_add(&dp->dl_perfile, &fp->fi_delegations); |
34ed9872 AE |
1000 | list_add(&dp->dl_perclnt, &clp->cl_delegations); |
1001 | return 0; | |
931ee56c BH |
1002 | } |
1003 | ||
3fcbbd24 | 1004 | static bool |
42690676 | 1005 | unhash_delegation_locked(struct nfs4_delegation *dp) |
1da177e4 | 1006 | { |
11b9164a | 1007 | struct nfs4_file *fp = dp->dl_stid.sc_file; |
02e1215f | 1008 | |
42690676 JL |
1009 | lockdep_assert_held(&state_lock); |
1010 | ||
3fcbbd24 JL |
1011 | if (list_empty(&dp->dl_perfile)) |
1012 | return false; | |
1013 | ||
b0fc29d6 | 1014 | dp->dl_stid.sc_type = NFS4_CLOSED_DELEG_STID; |
d55a166c JL |
1015 | /* Ensure that deleg break won't try to requeue it */ |
1016 | ++dp->dl_time; | |
417c6629 | 1017 | spin_lock(&fp->fi_lock); |
931ee56c | 1018 | list_del_init(&dp->dl_perclnt); |
1da177e4 | 1019 | list_del_init(&dp->dl_recall_lru); |
02e1215f JL |
1020 | list_del_init(&dp->dl_perfile); |
1021 | spin_unlock(&fp->fi_lock); | |
3fcbbd24 | 1022 | return true; |
3bd64a5b BF |
1023 | } |
1024 | ||
3bd64a5b BF |
1025 | static void destroy_delegation(struct nfs4_delegation *dp) |
1026 | { | |
3fcbbd24 JL |
1027 | bool unhashed; |
1028 | ||
42690676 | 1029 | spin_lock(&state_lock); |
3fcbbd24 | 1030 | unhashed = unhash_delegation_locked(dp); |
42690676 | 1031 | spin_unlock(&state_lock); |
0af6e690 BF |
1032 | if (unhashed) |
1033 | destroy_unhashed_deleg(dp); | |
3bd64a5b BF |
1034 | } |
1035 | ||
1036 | static void revoke_delegation(struct nfs4_delegation *dp) | |
1037 | { | |
1038 | struct nfs4_client *clp = dp->dl_stid.sc_client; | |
1039 | ||
2d4a532d JL |
1040 | WARN_ON(!list_empty(&dp->dl_recall_lru)); |
1041 | ||
0af6e690 | 1042 | if (clp->cl_minorversion) { |
3bd64a5b | 1043 | dp->dl_stid.sc_type = NFS4_REVOKED_DELEG_STID; |
0af6e690 | 1044 | refcount_inc(&dp->dl_stid.sc_count); |
2d4a532d JL |
1045 | spin_lock(&clp->cl_lock); |
1046 | list_add(&dp->dl_recall_lru, &clp->cl_revoked); | |
1047 | spin_unlock(&clp->cl_lock); | |
3bd64a5b | 1048 | } |
0af6e690 | 1049 | destroy_unhashed_deleg(dp); |
3bd64a5b BF |
1050 | } |
1051 | ||
1da177e4 LT |
1052 | /* |
1053 | * SETCLIENTID state | |
1054 | */ | |
1055 | ||
ddc04c41 BF |
1056 | static unsigned int clientid_hashval(u32 id) |
1057 | { | |
1058 | return id & CLIENT_HASH_MASK; | |
1059 | } | |
1060 | ||
1061 | static unsigned int clientstr_hashval(const char *name) | |
1062 | { | |
1063 | return opaque_hashval(name, 8) & CLIENT_HASH_MASK; | |
1064 | } | |
1065 | ||
f9d7562f BF |
1066 | /* |
1067 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
1068 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
1069 | * only what share bits are currently in force, but also what | |
1070 | * combinations of share bits previous opens have used. This allows us | |
1071 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
1072 | * return an error if the client attempt to downgrade to a combination | |
1073 | * of share bits not explicable by closing some of its previous opens. | |
1074 | * | |
1075 | * XXX: This enforcement is actually incomplete, since we don't keep | |
1076 | * track of access/deny bit combinations; so, e.g., we allow: | |
1077 | * | |
1078 | * OPEN allow read, deny write | |
1079 | * OPEN allow both, deny none | |
1080 | * DOWNGRADE allow read, deny none | |
1081 | * | |
1082 | * which we should reject. | |
1083 | */ | |
5ae037e5 JL |
1084 | static unsigned int |
1085 | bmap_to_share_mode(unsigned long bmap) { | |
f9d7562f | 1086 | int i; |
5ae037e5 | 1087 | unsigned int access = 0; |
f9d7562f | 1088 | |
f9d7562f BF |
1089 | for (i = 1; i < 4; i++) { |
1090 | if (test_bit(i, &bmap)) | |
5ae037e5 | 1091 | access |= i; |
f9d7562f | 1092 | } |
5ae037e5 | 1093 | return access; |
f9d7562f BF |
1094 | } |
1095 | ||
82c5ff1b JL |
1096 | /* set share access for a given stateid */ |
1097 | static inline void | |
1098 | set_access(u32 access, struct nfs4_ol_stateid *stp) | |
1099 | { | |
c11c591f JL |
1100 | unsigned char mask = 1 << access; |
1101 | ||
1102 | WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH); | |
1103 | stp->st_access_bmap |= mask; | |
82c5ff1b JL |
1104 | } |
1105 | ||
1106 | /* clear share access for a given stateid */ | |
1107 | static inline void | |
1108 | clear_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 | /* test whether a given stateid has access */ | |
1117 | static inline bool | |
1118 | test_access(u32 access, struct nfs4_ol_stateid *stp) | |
1119 | { | |
c11c591f JL |
1120 | unsigned char mask = 1 << access; |
1121 | ||
1122 | return (bool)(stp->st_access_bmap & mask); | |
82c5ff1b JL |
1123 | } |
1124 | ||
ce0fc43c JL |
1125 | /* set share deny for a given stateid */ |
1126 | static inline void | |
c11c591f | 1127 | set_deny(u32 deny, struct nfs4_ol_stateid *stp) |
ce0fc43c | 1128 | { |
c11c591f JL |
1129 | unsigned char mask = 1 << deny; |
1130 | ||
1131 | WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH); | |
1132 | stp->st_deny_bmap |= mask; | |
ce0fc43c JL |
1133 | } |
1134 | ||
1135 | /* clear share deny for a given stateid */ | |
1136 | static inline void | |
c11c591f | 1137 | clear_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 | /* test whether a given stateid is denying specific access */ | |
1146 | static inline bool | |
c11c591f | 1147 | test_deny(u32 deny, struct nfs4_ol_stateid *stp) |
ce0fc43c | 1148 | { |
c11c591f JL |
1149 | unsigned char mask = 1 << deny; |
1150 | ||
1151 | return (bool)(stp->st_deny_bmap & mask); | |
f9d7562f BF |
1152 | } |
1153 | ||
1154 | static int nfs4_access_to_omode(u32 access) | |
1155 | { | |
8f34a430 | 1156 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
1157 | case NFS4_SHARE_ACCESS_READ: |
1158 | return O_RDONLY; | |
1159 | case NFS4_SHARE_ACCESS_WRITE: | |
1160 | return O_WRONLY; | |
1161 | case NFS4_SHARE_ACCESS_BOTH: | |
1162 | return O_RDWR; | |
1163 | } | |
063b0fb9 BF |
1164 | WARN_ON_ONCE(1); |
1165 | return O_RDONLY; | |
f9d7562f BF |
1166 | } |
1167 | ||
baeb4ff0 JL |
1168 | /* |
1169 | * A stateid that had a deny mode associated with it is being released | |
1170 | * or downgraded. Recalculate the deny mode on the file. | |
1171 | */ | |
1172 | static void | |
1173 | recalculate_deny_mode(struct nfs4_file *fp) | |
1174 | { | |
1175 | struct nfs4_ol_stateid *stp; | |
1176 | ||
1177 | spin_lock(&fp->fi_lock); | |
1178 | fp->fi_share_deny = 0; | |
1179 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) | |
1180 | fp->fi_share_deny |= bmap_to_share_mode(stp->st_deny_bmap); | |
1181 | spin_unlock(&fp->fi_lock); | |
1182 | } | |
1183 | ||
1184 | static void | |
1185 | reset_union_bmap_deny(u32 deny, struct nfs4_ol_stateid *stp) | |
1186 | { | |
1187 | int i; | |
1188 | bool change = false; | |
1189 | ||
1190 | for (i = 1; i < 4; i++) { | |
1191 | if ((i & deny) != i) { | |
1192 | change = true; | |
1193 | clear_deny(i, stp); | |
1194 | } | |
1195 | } | |
1196 | ||
1197 | /* Recalculate per-file deny mode if there was a change */ | |
1198 | if (change) | |
11b9164a | 1199 | recalculate_deny_mode(stp->st_stid.sc_file); |
baeb4ff0 JL |
1200 | } |
1201 | ||
82c5ff1b JL |
1202 | /* release all access and file references for a given stateid */ |
1203 | static void | |
1204 | release_all_access(struct nfs4_ol_stateid *stp) | |
1205 | { | |
1206 | int i; | |
11b9164a | 1207 | struct nfs4_file *fp = stp->st_stid.sc_file; |
baeb4ff0 JL |
1208 | |
1209 | if (fp && stp->st_deny_bmap != 0) | |
1210 | recalculate_deny_mode(fp); | |
82c5ff1b JL |
1211 | |
1212 | for (i = 1; i < 4; i++) { | |
1213 | if (test_access(i, stp)) | |
11b9164a | 1214 | nfs4_file_put_access(stp->st_stid.sc_file, i); |
82c5ff1b JL |
1215 | clear_access(i, stp); |
1216 | } | |
1217 | } | |
1218 | ||
d50ffded KM |
1219 | static inline void nfs4_free_stateowner(struct nfs4_stateowner *sop) |
1220 | { | |
1221 | kfree(sop->so_owner.data); | |
1222 | sop->so_ops->so_free(sop); | |
1223 | } | |
1224 | ||
6b180f0b JL |
1225 | static void nfs4_put_stateowner(struct nfs4_stateowner *sop) |
1226 | { | |
a819ecc1 JL |
1227 | struct nfs4_client *clp = sop->so_client; |
1228 | ||
1229 | might_lock(&clp->cl_lock); | |
1230 | ||
1231 | if (!atomic_dec_and_lock(&sop->so_count, &clp->cl_lock)) | |
6b180f0b | 1232 | return; |
8f4b54c5 | 1233 | sop->so_ops->so_unhash(sop); |
a819ecc1 | 1234 | spin_unlock(&clp->cl_lock); |
d50ffded | 1235 | nfs4_free_stateowner(sop); |
6b180f0b JL |
1236 | } |
1237 | ||
e8568739 | 1238 | static bool unhash_ol_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 1239 | { |
11b9164a | 1240 | struct nfs4_file *fp = stp->st_stid.sc_file; |
1d31a253 | 1241 | |
1c755dc1 JL |
1242 | lockdep_assert_held(&stp->st_stateowner->so_client->cl_lock); |
1243 | ||
e8568739 JL |
1244 | if (list_empty(&stp->st_perfile)) |
1245 | return false; | |
1246 | ||
1d31a253 | 1247 | spin_lock(&fp->fi_lock); |
e8568739 | 1248 | list_del_init(&stp->st_perfile); |
1d31a253 | 1249 | spin_unlock(&fp->fi_lock); |
529d7b2a | 1250 | list_del(&stp->st_perstateowner); |
e8568739 | 1251 | return true; |
529d7b2a BF |
1252 | } |
1253 | ||
6011695d | 1254 | static void nfs4_free_ol_stateid(struct nfs4_stid *stid) |
529d7b2a | 1255 | { |
6011695d | 1256 | struct nfs4_ol_stateid *stp = openlockstateid(stid); |
4665e2ba | 1257 | |
8287f009 | 1258 | put_clnt_odstate(stp->st_clnt_odstate); |
6011695d | 1259 | release_all_access(stp); |
d3134b10 JL |
1260 | if (stp->st_stateowner) |
1261 | nfs4_put_stateowner(stp->st_stateowner); | |
6011695d | 1262 | kmem_cache_free(stateid_slab, stid); |
529d7b2a BF |
1263 | } |
1264 | ||
b49e084d | 1265 | static void nfs4_free_lock_stateid(struct nfs4_stid *stid) |
529d7b2a | 1266 | { |
b49e084d JL |
1267 | struct nfs4_ol_stateid *stp = openlockstateid(stid); |
1268 | struct nfs4_lockowner *lo = lockowner(stp->st_stateowner); | |
529d7b2a BF |
1269 | struct file *file; |
1270 | ||
b49e084d JL |
1271 | file = find_any_file(stp->st_stid.sc_file); |
1272 | if (file) | |
1273 | filp_close(file, (fl_owner_t)lo); | |
1274 | nfs4_free_ol_stateid(stid); | |
1275 | } | |
1276 | ||
2c41beb0 JL |
1277 | /* |
1278 | * Put the persistent reference to an already unhashed generic stateid, while | |
1279 | * holding the cl_lock. If it's the last reference, then put it onto the | |
1280 | * reaplist for later destruction. | |
1281 | */ | |
1282 | static void put_ol_stateid_locked(struct nfs4_ol_stateid *stp, | |
1283 | struct list_head *reaplist) | |
1284 | { | |
1285 | struct nfs4_stid *s = &stp->st_stid; | |
1286 | struct nfs4_client *clp = s->sc_client; | |
1287 | ||
1288 | lockdep_assert_held(&clp->cl_lock); | |
1289 | ||
1290 | WARN_ON_ONCE(!list_empty(&stp->st_locks)); | |
1291 | ||
a15dfcd5 | 1292 | if (!refcount_dec_and_test(&s->sc_count)) { |
2c41beb0 JL |
1293 | wake_up_all(&close_wq); |
1294 | return; | |
1295 | } | |
1296 | ||
1297 | idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id); | |
1298 | list_add(&stp->st_locks, reaplist); | |
1299 | } | |
1300 | ||
e8568739 | 1301 | static bool unhash_lock_stateid(struct nfs4_ol_stateid *stp) |
b49e084d | 1302 | { |
f46c445b | 1303 | lockdep_assert_held(&stp->st_stid.sc_client->cl_lock); |
3c1c995c JL |
1304 | |
1305 | list_del_init(&stp->st_locks); | |
cd61c522 | 1306 | nfs4_unhash_stid(&stp->st_stid); |
e8568739 | 1307 | return unhash_ol_stateid(stp); |
3c1c995c JL |
1308 | } |
1309 | ||
1310 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) | |
1311 | { | |
f46c445b | 1312 | struct nfs4_client *clp = stp->st_stid.sc_client; |
e8568739 | 1313 | bool unhashed; |
3c1c995c | 1314 | |
f46c445b | 1315 | spin_lock(&clp->cl_lock); |
e8568739 | 1316 | unhashed = unhash_lock_stateid(stp); |
f46c445b | 1317 | spin_unlock(&clp->cl_lock); |
e8568739 JL |
1318 | if (unhashed) |
1319 | nfs4_put_stid(&stp->st_stid); | |
529d7b2a BF |
1320 | } |
1321 | ||
c58c6610 | 1322 | static void unhash_lockowner_locked(struct nfs4_lockowner *lo) |
8f4b54c5 | 1323 | { |
d4f0489f | 1324 | struct nfs4_client *clp = lo->lo_owner.so_client; |
c58c6610 | 1325 | |
d4f0489f | 1326 | lockdep_assert_held(&clp->cl_lock); |
c58c6610 | 1327 | |
8f4b54c5 JL |
1328 | list_del_init(&lo->lo_owner.so_strhash); |
1329 | } | |
1330 | ||
2c41beb0 JL |
1331 | /* |
1332 | * Free a list of generic stateids that were collected earlier after being | |
1333 | * fully unhashed. | |
1334 | */ | |
1335 | static void | |
1336 | free_ol_stateid_reaplist(struct list_head *reaplist) | |
1337 | { | |
1338 | struct nfs4_ol_stateid *stp; | |
fb94d766 | 1339 | struct nfs4_file *fp; |
2c41beb0 JL |
1340 | |
1341 | might_sleep(); | |
1342 | ||
1343 | while (!list_empty(reaplist)) { | |
1344 | stp = list_first_entry(reaplist, struct nfs4_ol_stateid, | |
1345 | st_locks); | |
1346 | list_del(&stp->st_locks); | |
fb94d766 | 1347 | fp = stp->st_stid.sc_file; |
2c41beb0 | 1348 | stp->st_stid.sc_free(&stp->st_stid); |
fb94d766 KM |
1349 | if (fp) |
1350 | put_nfs4_file(fp); | |
2c41beb0 JL |
1351 | } |
1352 | } | |
1353 | ||
d83017f9 JL |
1354 | static void release_open_stateid_locks(struct nfs4_ol_stateid *open_stp, |
1355 | struct list_head *reaplist) | |
3c87b9b7 TM |
1356 | { |
1357 | struct nfs4_ol_stateid *stp; | |
1358 | ||
e8568739 JL |
1359 | lockdep_assert_held(&open_stp->st_stid.sc_client->cl_lock); |
1360 | ||
3c87b9b7 TM |
1361 | while (!list_empty(&open_stp->st_locks)) { |
1362 | stp = list_entry(open_stp->st_locks.next, | |
1363 | struct nfs4_ol_stateid, st_locks); | |
e8568739 | 1364 | WARN_ON(!unhash_lock_stateid(stp)); |
d83017f9 | 1365 | put_ol_stateid_locked(stp, reaplist); |
529d7b2a BF |
1366 | } |
1367 | } | |
1368 | ||
e8568739 | 1369 | static bool unhash_open_stateid(struct nfs4_ol_stateid *stp, |
d83017f9 | 1370 | struct list_head *reaplist) |
2283963f | 1371 | { |
e8568739 JL |
1372 | bool unhashed; |
1373 | ||
2c41beb0 JL |
1374 | lockdep_assert_held(&stp->st_stid.sc_client->cl_lock); |
1375 | ||
e8568739 | 1376 | unhashed = unhash_ol_stateid(stp); |
d83017f9 | 1377 | release_open_stateid_locks(stp, reaplist); |
e8568739 | 1378 | return unhashed; |
38c387b5 BF |
1379 | } |
1380 | ||
1381 | static void release_open_stateid(struct nfs4_ol_stateid *stp) | |
1382 | { | |
2c41beb0 JL |
1383 | LIST_HEAD(reaplist); |
1384 | ||
1385 | spin_lock(&stp->st_stid.sc_client->cl_lock); | |
e8568739 JL |
1386 | if (unhash_open_stateid(stp, &reaplist)) |
1387 | put_ol_stateid_locked(stp, &reaplist); | |
2c41beb0 JL |
1388 | spin_unlock(&stp->st_stid.sc_client->cl_lock); |
1389 | free_ol_stateid_reaplist(&reaplist); | |
2283963f BF |
1390 | } |
1391 | ||
7ffb5880 | 1392 | static void unhash_openowner_locked(struct nfs4_openowner *oo) |
f1d110ca | 1393 | { |
d4f0489f | 1394 | struct nfs4_client *clp = oo->oo_owner.so_client; |
7ffb5880 | 1395 | |
d4f0489f | 1396 | lockdep_assert_held(&clp->cl_lock); |
7ffb5880 | 1397 | |
8f4b54c5 JL |
1398 | list_del_init(&oo->oo_owner.so_strhash); |
1399 | list_del_init(&oo->oo_perclient); | |
f1d110ca BF |
1400 | } |
1401 | ||
f7a4d872 BF |
1402 | static void release_last_closed_stateid(struct nfs4_openowner *oo) |
1403 | { | |
217526e7 JL |
1404 | struct nfsd_net *nn = net_generic(oo->oo_owner.so_client->net, |
1405 | nfsd_net_id); | |
1406 | struct nfs4_ol_stateid *s; | |
f7a4d872 | 1407 | |
217526e7 JL |
1408 | spin_lock(&nn->client_lock); |
1409 | s = oo->oo_last_closed_stid; | |
f7a4d872 | 1410 | if (s) { |
d3134b10 | 1411 | list_del_init(&oo->oo_close_lru); |
f7a4d872 BF |
1412 | oo->oo_last_closed_stid = NULL; |
1413 | } | |
217526e7 JL |
1414 | spin_unlock(&nn->client_lock); |
1415 | if (s) | |
1416 | nfs4_put_stid(&s->st_stid); | |
f7a4d872 BF |
1417 | } |
1418 | ||
2c41beb0 | 1419 | static void release_openowner(struct nfs4_openowner *oo) |
8f4b54c5 JL |
1420 | { |
1421 | struct nfs4_ol_stateid *stp; | |
d4f0489f | 1422 | struct nfs4_client *clp = oo->oo_owner.so_client; |
2c41beb0 | 1423 | struct list_head reaplist; |
7ffb5880 | 1424 | |
2c41beb0 | 1425 | INIT_LIST_HEAD(&reaplist); |
8f4b54c5 | 1426 | |
2c41beb0 JL |
1427 | spin_lock(&clp->cl_lock); |
1428 | unhash_openowner_locked(oo); | |
8f4b54c5 JL |
1429 | while (!list_empty(&oo->oo_owner.so_stateids)) { |
1430 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
1431 | struct nfs4_ol_stateid, st_perstateowner); | |
e8568739 JL |
1432 | if (unhash_open_stateid(stp, &reaplist)) |
1433 | put_ol_stateid_locked(stp, &reaplist); | |
8f4b54c5 | 1434 | } |
d4f0489f | 1435 | spin_unlock(&clp->cl_lock); |
2c41beb0 | 1436 | free_ol_stateid_reaplist(&reaplist); |
f7a4d872 | 1437 | release_last_closed_stateid(oo); |
6b180f0b | 1438 | nfs4_put_stateowner(&oo->oo_owner); |
f1d110ca BF |
1439 | } |
1440 | ||
5282fd72 ME |
1441 | static inline int |
1442 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
1443 | { | |
1444 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
1445 | ||
1446 | return sid->sequence % SESSION_HASH_SIZE; | |
1447 | } | |
1448 | ||
135dd002 | 1449 | #ifdef CONFIG_SUNRPC_DEBUG |
5282fd72 ME |
1450 | static inline void |
1451 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
1452 | { | |
1453 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
1454 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
1455 | } | |
8f199b82 TM |
1456 | #else |
1457 | static inline void | |
1458 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
1459 | { | |
1460 | } | |
1461 | #endif | |
1462 | ||
9411b1d4 BF |
1463 | /* |
1464 | * Bump the seqid on cstate->replay_owner, and clear replay_owner if it | |
1465 | * won't be used for replay. | |
1466 | */ | |
1467 | void nfsd4_bump_seqid(struct nfsd4_compound_state *cstate, __be32 nfserr) | |
1468 | { | |
1469 | struct nfs4_stateowner *so = cstate->replay_owner; | |
1470 | ||
1471 | if (nfserr == nfserr_replay_me) | |
1472 | return; | |
1473 | ||
1474 | if (!seqid_mutating_err(ntohl(nfserr))) { | |
58fb12e6 | 1475 | nfsd4_cstate_clear_replay(cstate); |
9411b1d4 BF |
1476 | return; |
1477 | } | |
1478 | if (!so) | |
1479 | return; | |
1480 | if (so->so_is_open_owner) | |
1481 | release_last_closed_stateid(openowner(so)); | |
1482 | so->so_seqid++; | |
1483 | return; | |
1484 | } | |
5282fd72 | 1485 | |
ec6b5d7b AA |
1486 | static void |
1487 | gen_sessionid(struct nfsd4_session *ses) | |
1488 | { | |
1489 | struct nfs4_client *clp = ses->se_client; | |
1490 | struct nfsd4_sessionid *sid; | |
1491 | ||
1492 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
1493 | sid->clientid = clp->cl_clientid; | |
1494 | sid->sequence = current_sessionid++; | |
1495 | sid->reserved = 0; | |
1496 | } | |
1497 | ||
1498 | /* | |
a649637c AA |
1499 | * The protocol defines ca_maxresponssize_cached to include the size of |
1500 | * the rpc header, but all we need to cache is the data starting after | |
1501 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
1502 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
1503 | * value that is the number of bytes in our cache plus a few additional | |
1504 | * bytes. In order to stay on the safe side, and not promise more than | |
1505 | * we can cache, those additional bytes must be the minimum possible: 24 | |
1506 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
1507 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
1508 | * for the SEQUENCE op response: | |
1509 | */ | |
1510 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
1511 | ||
557ce264 AA |
1512 | static void |
1513 | free_session_slots(struct nfsd4_session *ses) | |
1514 | { | |
1515 | int i; | |
1516 | ||
53da6a53 BF |
1517 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) { |
1518 | free_svc_cred(&ses->se_slots[i]->sl_cred); | |
557ce264 | 1519 | kfree(ses->se_slots[i]); |
53da6a53 | 1520 | } |
557ce264 AA |
1521 | } |
1522 | ||
a649637c | 1523 | /* |
efe0cb6d BF |
1524 | * We don't actually need to cache the rpc and session headers, so we |
1525 | * can allocate a little less for each slot: | |
1526 | */ | |
55c760cf | 1527 | static inline u32 slot_bytes(struct nfsd4_channel_attrs *ca) |
efe0cb6d | 1528 | { |
55c760cf | 1529 | u32 size; |
efe0cb6d | 1530 | |
55c760cf BF |
1531 | if (ca->maxresp_cached < NFSD_MIN_HDR_SEQ_SZ) |
1532 | size = 0; | |
1533 | else | |
1534 | size = ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
1535 | return size + sizeof(struct nfsd4_slot); | |
5b6feee9 | 1536 | } |
ec6b5d7b | 1537 | |
5b6feee9 BF |
1538 | /* |
1539 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c | 1540 | * re-negotiate active sessions and reduce their slot usage to make |
42b2aa86 | 1541 | * room for new connections. For now we just fail the create session. |
ec6b5d7b | 1542 | */ |
55c760cf | 1543 | static u32 nfsd4_get_drc_mem(struct nfsd4_channel_attrs *ca) |
ec6b5d7b | 1544 | { |
55c760cf BF |
1545 | u32 slotsize = slot_bytes(ca); |
1546 | u32 num = ca->maxreqs; | |
c54f24e3 | 1547 | unsigned long avail, total_avail; |
ec6b5d7b | 1548 | |
5b6feee9 | 1549 | spin_lock(&nfsd_drc_lock); |
c54f24e3 BF |
1550 | total_avail = nfsd_drc_max_mem - nfsd_drc_mem_used; |
1551 | avail = min((unsigned long)NFSD_MAX_MEM_PER_SESSION, total_avail); | |
de766e57 BF |
1552 | /* |
1553 | * Never use more than a third of the remaining memory, | |
1554 | * unless it's the only way to give this client a slot: | |
1555 | */ | |
c54f24e3 | 1556 | avail = clamp_t(int, avail, slotsize, total_avail/3); |
5b6feee9 BF |
1557 | num = min_t(int, num, avail / slotsize); |
1558 | nfsd_drc_mem_used += num * slotsize; | |
1559 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 1560 | |
5b6feee9 BF |
1561 | return num; |
1562 | } | |
ec6b5d7b | 1563 | |
55c760cf | 1564 | static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs *ca) |
5b6feee9 | 1565 | { |
55c760cf BF |
1566 | int slotsize = slot_bytes(ca); |
1567 | ||
4bd9b0f4 | 1568 | spin_lock(&nfsd_drc_lock); |
55c760cf | 1569 | nfsd_drc_mem_used -= slotsize * ca->maxreqs; |
4bd9b0f4 | 1570 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 1571 | } |
ec6b5d7b | 1572 | |
60810e54 KM |
1573 | static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fattrs, |
1574 | struct nfsd4_channel_attrs *battrs) | |
5b6feee9 | 1575 | { |
60810e54 KM |
1576 | int numslots = fattrs->maxreqs; |
1577 | int slotsize = slot_bytes(fattrs); | |
5b6feee9 BF |
1578 | struct nfsd4_session *new; |
1579 | int mem, i; | |
a649637c | 1580 | |
5b6feee9 BF |
1581 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
1582 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
1583 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 1584 | |
5b6feee9 BF |
1585 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
1586 | if (!new) | |
1587 | return NULL; | |
557ce264 | 1588 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 | 1589 | for (i = 0; i < numslots; i++) { |
55c760cf | 1590 | new->se_slots[i] = kzalloc(slotsize, GFP_KERNEL); |
5b6feee9 | 1591 | if (!new->se_slots[i]) |
557ce264 | 1592 | goto out_free; |
557ce264 | 1593 | } |
60810e54 KM |
1594 | |
1595 | memcpy(&new->se_fchannel, fattrs, sizeof(struct nfsd4_channel_attrs)); | |
1596 | memcpy(&new->se_bchannel, battrs, sizeof(struct nfsd4_channel_attrs)); | |
1597 | ||
5b6feee9 BF |
1598 | return new; |
1599 | out_free: | |
1600 | while (i--) | |
1601 | kfree(new->se_slots[i]); | |
1602 | kfree(new); | |
1603 | return NULL; | |
ec6b5d7b AA |
1604 | } |
1605 | ||
19cf5c02 BF |
1606 | static void free_conn(struct nfsd4_conn *c) |
1607 | { | |
1608 | svc_xprt_put(c->cn_xprt); | |
1609 | kfree(c); | |
1610 | } | |
ec6b5d7b | 1611 | |
19cf5c02 BF |
1612 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
1613 | { | |
1614 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
1615 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 1616 | |
19cf5c02 BF |
1617 | spin_lock(&clp->cl_lock); |
1618 | if (!list_empty(&c->cn_persession)) { | |
1619 | list_del(&c->cn_persession); | |
1620 | free_conn(c); | |
1621 | } | |
eea49806 | 1622 | nfsd4_probe_callback(clp); |
2e4b7239 | 1623 | spin_unlock(&clp->cl_lock); |
19cf5c02 | 1624 | } |
ec6b5d7b | 1625 | |
d29c374c | 1626 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 1627 | { |
c7662518 | 1628 | struct nfsd4_conn *conn; |
ec6b5d7b | 1629 | |
c7662518 BF |
1630 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
1631 | if (!conn) | |
db90681d | 1632 | return NULL; |
c7662518 BF |
1633 | svc_xprt_get(rqstp->rq_xprt); |
1634 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 1635 | conn->cn_flags = flags; |
db90681d BF |
1636 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
1637 | return conn; | |
1638 | } | |
a649637c | 1639 | |
328ead28 BF |
1640 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
1641 | { | |
1642 | conn->cn_session = ses; | |
1643 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
1644 | } |
1645 | ||
db90681d | 1646 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 1647 | { |
db90681d | 1648 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 1649 | |
c7662518 | 1650 | spin_lock(&clp->cl_lock); |
328ead28 | 1651 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 1652 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
1653 | } |
1654 | ||
21b75b01 | 1655 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 1656 | { |
19cf5c02 | 1657 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 1658 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
1659 | } |
1660 | ||
e1ff371f | 1661 | static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses) |
ec6b5d7b | 1662 | { |
21b75b01 | 1663 | int ret; |
ec6b5d7b | 1664 | |
db90681d | 1665 | nfsd4_hash_conn(conn, ses); |
21b75b01 BF |
1666 | ret = nfsd4_register_conn(conn); |
1667 | if (ret) | |
1668 | /* oops; xprt is already down: */ | |
1669 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
57a37144 BF |
1670 | /* We may have gained or lost a callback channel: */ |
1671 | nfsd4_probe_callback_sync(ses->se_client); | |
c7662518 | 1672 | } |
ec6b5d7b | 1673 | |
e1ff371f | 1674 | static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses) |
1d1bc8f2 BF |
1675 | { |
1676 | u32 dir = NFS4_CDFC4_FORE; | |
1677 | ||
e1ff371f | 1678 | if (cses->flags & SESSION4_BACK_CHAN) |
1d1bc8f2 | 1679 | dir |= NFS4_CDFC4_BACK; |
e1ff371f | 1680 | return alloc_conn(rqstp, dir); |
1d1bc8f2 BF |
1681 | } |
1682 | ||
1683 | /* must be called under client_lock */ | |
19cf5c02 | 1684 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 1685 | { |
19cf5c02 BF |
1686 | struct nfs4_client *clp = s->se_client; |
1687 | struct nfsd4_conn *c; | |
ec6b5d7b | 1688 | |
19cf5c02 BF |
1689 | spin_lock(&clp->cl_lock); |
1690 | while (!list_empty(&s->se_conns)) { | |
1691 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
1692 | list_del_init(&c->cn_persession); | |
1693 | spin_unlock(&clp->cl_lock); | |
557ce264 | 1694 | |
19cf5c02 BF |
1695 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
1696 | free_conn(c); | |
ec6b5d7b | 1697 | |
19cf5c02 BF |
1698 | spin_lock(&clp->cl_lock); |
1699 | } | |
1700 | spin_unlock(&clp->cl_lock); | |
c7662518 | 1701 | } |
ec6b5d7b | 1702 | |
1377b69e BF |
1703 | static void __free_session(struct nfsd4_session *ses) |
1704 | { | |
1377b69e BF |
1705 | free_session_slots(ses); |
1706 | kfree(ses); | |
1707 | } | |
1708 | ||
66b2b9b2 | 1709 | static void free_session(struct nfsd4_session *ses) |
c7662518 | 1710 | { |
19cf5c02 | 1711 | nfsd4_del_conns(ses); |
55c760cf | 1712 | nfsd4_put_drc_mem(&ses->se_fchannel); |
1377b69e | 1713 | __free_session(ses); |
c7662518 BF |
1714 | } |
1715 | ||
135ae827 | 1716 | static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
a827bcb2 | 1717 | { |
a827bcb2 | 1718 | int idx; |
1872de0e | 1719 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
a827bcb2 | 1720 | |
ec6b5d7b AA |
1721 | new->se_client = clp; |
1722 | gen_sessionid(new); | |
ec6b5d7b | 1723 | |
c7662518 BF |
1724 | INIT_LIST_HEAD(&new->se_conns); |
1725 | ||
ac7c46f2 | 1726 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 1727 | new->se_flags = cses->flags; |
8b5ce5cd | 1728 | new->se_cb_prog = cses->callback_prog; |
c6bb3ca2 | 1729 | new->se_cb_sec = cses->cb_sec; |
66b2b9b2 | 1730 | atomic_set(&new->se_ref, 0); |
5b6feee9 | 1731 | idx = hash_sessionid(&new->se_sessionid); |
1872de0e | 1732 | list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]); |
4c649378 | 1733 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 1734 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 1735 | spin_unlock(&clp->cl_lock); |
60810e54 | 1736 | |
b0d2e42c | 1737 | { |
edd76786 | 1738 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
1739 | /* |
1740 | * This is a little silly; with sessions there's no real | |
1741 | * use for the callback address. Use the peer address | |
1742 | * as a reasonable default for now, but consider fixing | |
1743 | * the rpc client not to require an address in the | |
1744 | * future: | |
1745 | */ | |
edd76786 BF |
1746 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
1747 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 1748 | } |
ec6b5d7b AA |
1749 | } |
1750 | ||
9089f1b4 | 1751 | /* caller must hold client_lock */ |
5282fd72 | 1752 | static struct nfsd4_session * |
d4e19e70 | 1753 | __find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net) |
5282fd72 ME |
1754 | { |
1755 | struct nfsd4_session *elem; | |
1756 | int idx; | |
1872de0e | 1757 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
5282fd72 | 1758 | |
0a880a28 TM |
1759 | lockdep_assert_held(&nn->client_lock); |
1760 | ||
5282fd72 ME |
1761 | dump_sessionid(__func__, sessionid); |
1762 | idx = hash_sessionid(sessionid); | |
5282fd72 | 1763 | /* Search in the appropriate list */ |
1872de0e | 1764 | list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) { |
5282fd72 ME |
1765 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
1766 | NFS4_MAX_SESSIONID_LEN)) { | |
1767 | return elem; | |
1768 | } | |
1769 | } | |
1770 | ||
1771 | dprintk("%s: session not found\n", __func__); | |
1772 | return NULL; | |
1773 | } | |
1774 | ||
d4e19e70 TM |
1775 | static struct nfsd4_session * |
1776 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net, | |
1777 | __be32 *ret) | |
1778 | { | |
1779 | struct nfsd4_session *session; | |
1780 | __be32 status = nfserr_badsession; | |
1781 | ||
1782 | session = __find_in_sessionid_hashtbl(sessionid, net); | |
1783 | if (!session) | |
1784 | goto out; | |
1785 | status = nfsd4_get_session_locked(session); | |
1786 | if (status) | |
1787 | session = NULL; | |
1788 | out: | |
1789 | *ret = status; | |
1790 | return session; | |
1791 | } | |
1792 | ||
9089f1b4 | 1793 | /* caller must hold client_lock */ |
7116ed6b | 1794 | static void |
5282fd72 | 1795 | unhash_session(struct nfsd4_session *ses) |
7116ed6b | 1796 | { |
0a880a28 TM |
1797 | struct nfs4_client *clp = ses->se_client; |
1798 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
1799 | ||
1800 | lockdep_assert_held(&nn->client_lock); | |
1801 | ||
7116ed6b | 1802 | list_del(&ses->se_hash); |
4c649378 | 1803 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 1804 | list_del(&ses->se_perclnt); |
4c649378 | 1805 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
1806 | } |
1807 | ||
1da177e4 LT |
1808 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
1809 | static int | |
2c142baa | 1810 | STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn) |
1da177e4 | 1811 | { |
bbc7f33a BF |
1812 | /* |
1813 | * We're assuming the clid was not given out from a boot | |
1814 | * precisely 2^32 (about 136 years) before this one. That seems | |
1815 | * a safe assumption: | |
1816 | */ | |
1817 | if (clid->cl_boot == (u32)nn->boot_time) | |
1da177e4 | 1818 | return 0; |
60adfc50 | 1819 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
2c142baa | 1820 | clid->cl_boot, clid->cl_id, nn->boot_time); |
1da177e4 LT |
1821 | return 1; |
1822 | } | |
1823 | ||
1824 | /* | |
1825 | * XXX Should we use a slab cache ? | |
1826 | * This type of memory management is somewhat inefficient, but we use it | |
1827 | * anyway since SETCLIENTID is not a common operation. | |
1828 | */ | |
35bba9a3 | 1829 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
1830 | { |
1831 | struct nfs4_client *clp; | |
d4f0489f | 1832 | int i; |
1da177e4 | 1833 | |
9258a2d5 | 1834 | clp = kmem_cache_zalloc(client_slab, GFP_KERNEL); |
35bba9a3 BF |
1835 | if (clp == NULL) |
1836 | return NULL; | |
67114fe6 | 1837 | clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); |
d4f0489f TM |
1838 | if (clp->cl_name.data == NULL) |
1839 | goto err_no_name; | |
6da2ec56 KC |
1840 | clp->cl_ownerstr_hashtbl = kmalloc_array(OWNER_HASH_SIZE, |
1841 | sizeof(struct list_head), | |
1842 | GFP_KERNEL); | |
d4f0489f TM |
1843 | if (!clp->cl_ownerstr_hashtbl) |
1844 | goto err_no_hashtbl; | |
1845 | for (i = 0; i < OWNER_HASH_SIZE; i++) | |
1846 | INIT_LIST_HEAD(&clp->cl_ownerstr_hashtbl[i]); | |
35bba9a3 | 1847 | clp->cl_name.len = name.len; |
5694c93e TM |
1848 | INIT_LIST_HEAD(&clp->cl_sessions); |
1849 | idr_init(&clp->cl_stateids); | |
1850 | atomic_set(&clp->cl_refcount, 0); | |
1851 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; | |
1852 | INIT_LIST_HEAD(&clp->cl_idhash); | |
1853 | INIT_LIST_HEAD(&clp->cl_openowners); | |
1854 | INIT_LIST_HEAD(&clp->cl_delegations); | |
1855 | INIT_LIST_HEAD(&clp->cl_lru); | |
5694c93e | 1856 | INIT_LIST_HEAD(&clp->cl_revoked); |
9cf514cc CH |
1857 | #ifdef CONFIG_NFSD_PNFS |
1858 | INIT_LIST_HEAD(&clp->cl_lo_states); | |
1859 | #endif | |
e0639dc5 OK |
1860 | INIT_LIST_HEAD(&clp->async_copies); |
1861 | spin_lock_init(&clp->async_lock); | |
5694c93e TM |
1862 | spin_lock_init(&clp->cl_lock); |
1863 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1da177e4 | 1864 | return clp; |
d4f0489f TM |
1865 | err_no_hashtbl: |
1866 | kfree(clp->cl_name.data); | |
1867 | err_no_name: | |
9258a2d5 | 1868 | kmem_cache_free(client_slab, clp); |
d4f0489f | 1869 | return NULL; |
1da177e4 LT |
1870 | } |
1871 | ||
4dd86e15 | 1872 | static void |
1da177e4 LT |
1873 | free_client(struct nfs4_client *clp) |
1874 | { | |
792c95dd BF |
1875 | while (!list_empty(&clp->cl_sessions)) { |
1876 | struct nfsd4_session *ses; | |
1877 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
1878 | se_perclnt); | |
1879 | list_del(&ses->se_perclnt); | |
66b2b9b2 BF |
1880 | WARN_ON_ONCE(atomic_read(&ses->se_ref)); |
1881 | free_session(ses); | |
792c95dd | 1882 | } |
4cb57e30 | 1883 | rpc_destroy_wait_queue(&clp->cl_cb_waitq); |
03a4e1f6 | 1884 | free_svc_cred(&clp->cl_cred); |
d4f0489f | 1885 | kfree(clp->cl_ownerstr_hashtbl); |
1da177e4 | 1886 | kfree(clp->cl_name.data); |
2d32b29a | 1887 | idr_destroy(&clp->cl_stateids); |
9258a2d5 | 1888 | kmem_cache_free(client_slab, clp); |
1da177e4 LT |
1889 | } |
1890 | ||
84d38ac9 | 1891 | /* must be called under the client_lock */ |
4beb345b | 1892 | static void |
84d38ac9 BH |
1893 | unhash_client_locked(struct nfs4_client *clp) |
1894 | { | |
4beb345b | 1895 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
792c95dd BF |
1896 | struct nfsd4_session *ses; |
1897 | ||
0a880a28 TM |
1898 | lockdep_assert_held(&nn->client_lock); |
1899 | ||
4beb345b TM |
1900 | /* Mark the client as expired! */ |
1901 | clp->cl_time = 0; | |
1902 | /* Make it invisible */ | |
1903 | if (!list_empty(&clp->cl_idhash)) { | |
1904 | list_del_init(&clp->cl_idhash); | |
1905 | if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) | |
1906 | rb_erase(&clp->cl_namenode, &nn->conf_name_tree); | |
1907 | else | |
1908 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); | |
1909 | } | |
1910 | list_del_init(&clp->cl_lru); | |
4c649378 | 1911 | spin_lock(&clp->cl_lock); |
792c95dd BF |
1912 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
1913 | list_del_init(&ses->se_hash); | |
4c649378 | 1914 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
1915 | } |
1916 | ||
1da177e4 | 1917 | static void |
4beb345b TM |
1918 | unhash_client(struct nfs4_client *clp) |
1919 | { | |
1920 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
1921 | ||
1922 | spin_lock(&nn->client_lock); | |
1923 | unhash_client_locked(clp); | |
1924 | spin_unlock(&nn->client_lock); | |
1925 | } | |
1926 | ||
97403d95 JL |
1927 | static __be32 mark_client_expired_locked(struct nfs4_client *clp) |
1928 | { | |
1929 | if (atomic_read(&clp->cl_refcount)) | |
1930 | return nfserr_jukebox; | |
1931 | unhash_client_locked(clp); | |
1932 | return nfs_ok; | |
1933 | } | |
1934 | ||
4beb345b TM |
1935 | static void |
1936 | __destroy_client(struct nfs4_client *clp) | |
1da177e4 | 1937 | { |
68ef3bc3 | 1938 | int i; |
fe0750e5 | 1939 | struct nfs4_openowner *oo; |
1da177e4 | 1940 | struct nfs4_delegation *dp; |
1da177e4 LT |
1941 | struct list_head reaplist; |
1942 | ||
1da177e4 | 1943 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 1944 | spin_lock(&state_lock); |
ea1da636 N |
1945 | while (!list_empty(&clp->cl_delegations)) { |
1946 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
3fcbbd24 | 1947 | WARN_ON(!unhash_delegation_locked(dp)); |
42690676 | 1948 | list_add(&dp->dl_recall_lru, &reaplist); |
1da177e4 | 1949 | } |
cdc97505 | 1950 | spin_unlock(&state_lock); |
1da177e4 LT |
1951 | while (!list_empty(&reaplist)) { |
1952 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
42690676 | 1953 | list_del_init(&dp->dl_recall_lru); |
0af6e690 | 1954 | destroy_unhashed_deleg(dp); |
1da177e4 | 1955 | } |
2d4a532d | 1956 | while (!list_empty(&clp->cl_revoked)) { |
c876486b | 1957 | dp = list_entry(clp->cl_revoked.next, struct nfs4_delegation, dl_recall_lru); |
2d4a532d | 1958 | list_del_init(&dp->dl_recall_lru); |
6011695d | 1959 | nfs4_put_stid(&dp->dl_stid); |
956c4fee | 1960 | } |
ea1da636 | 1961 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 | 1962 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
b5971afa | 1963 | nfs4_get_stateowner(&oo->oo_owner); |
fe0750e5 | 1964 | release_openowner(oo); |
1da177e4 | 1965 | } |
68ef3bc3 JL |
1966 | for (i = 0; i < OWNER_HASH_SIZE; i++) { |
1967 | struct nfs4_stateowner *so, *tmp; | |
1968 | ||
1969 | list_for_each_entry_safe(so, tmp, &clp->cl_ownerstr_hashtbl[i], | |
1970 | so_strhash) { | |
1971 | /* Should be no openowners at this point */ | |
1972 | WARN_ON_ONCE(so->so_is_open_owner); | |
1973 | remove_blocked_locks(lockowner(so)); | |
1974 | } | |
1975 | } | |
9cf514cc | 1976 | nfsd4_return_all_client_layouts(clp); |
e0639dc5 | 1977 | nfsd4_shutdown_copy(clp); |
6ff8da08 | 1978 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
1979 | if (clp->cl_cb_conn.cb_xprt) |
1980 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
221a6876 | 1981 | free_client(clp); |
1da177e4 LT |
1982 | } |
1983 | ||
4beb345b TM |
1984 | static void |
1985 | destroy_client(struct nfs4_client *clp) | |
1986 | { | |
1987 | unhash_client(clp); | |
1988 | __destroy_client(clp); | |
1989 | } | |
1990 | ||
0d22f68f BF |
1991 | static void expire_client(struct nfs4_client *clp) |
1992 | { | |
4beb345b | 1993 | unhash_client(clp); |
0d22f68f | 1994 | nfsd4_client_record_remove(clp); |
4beb345b | 1995 | __destroy_client(clp); |
0d22f68f BF |
1996 | } |
1997 | ||
35bba9a3 BF |
1998 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
1999 | { | |
2000 | memcpy(target->cl_verifier.data, source->data, | |
2001 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
2002 | } |
2003 | ||
35bba9a3 BF |
2004 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
2005 | { | |
1da177e4 LT |
2006 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
2007 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
2008 | } | |
2009 | ||
50043859 BF |
2010 | static int copy_cred(struct svc_cred *target, struct svc_cred *source) |
2011 | { | |
2f10fdcb N |
2012 | target->cr_principal = kstrdup(source->cr_principal, GFP_KERNEL); |
2013 | target->cr_raw_principal = kstrdup(source->cr_raw_principal, | |
2014 | GFP_KERNEL); | |
9abdda5d CL |
2015 | target->cr_targ_princ = kstrdup(source->cr_targ_princ, GFP_KERNEL); |
2016 | if ((source->cr_principal && !target->cr_principal) || | |
2017 | (source->cr_raw_principal && !target->cr_raw_principal) || | |
2018 | (source->cr_targ_princ && !target->cr_targ_princ)) | |
2f10fdcb | 2019 | return -ENOMEM; |
50043859 | 2020 | |
d5497fc6 | 2021 | target->cr_flavor = source->cr_flavor; |
1da177e4 LT |
2022 | target->cr_uid = source->cr_uid; |
2023 | target->cr_gid = source->cr_gid; | |
2024 | target->cr_group_info = source->cr_group_info; | |
2025 | get_group_info(target->cr_group_info); | |
0dc1531a BF |
2026 | target->cr_gss_mech = source->cr_gss_mech; |
2027 | if (source->cr_gss_mech) | |
2028 | gss_mech_get(source->cr_gss_mech); | |
03a4e1f6 | 2029 | return 0; |
1da177e4 LT |
2030 | } |
2031 | ||
ef17af2a | 2032 | static int |
ac55fdc4 JL |
2033 | compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2) |
2034 | { | |
ef17af2a RV |
2035 | if (o1->len < o2->len) |
2036 | return -1; | |
2037 | if (o1->len > o2->len) | |
2038 | return 1; | |
2039 | return memcmp(o1->data, o2->data, o1->len); | |
ac55fdc4 JL |
2040 | } |
2041 | ||
35bba9a3 | 2042 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 2043 | { |
a55370a3 | 2044 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
2045 | } |
2046 | ||
2047 | static int | |
599e0a22 BF |
2048 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
2049 | { | |
2050 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
2051 | } |
2052 | ||
2053 | static int | |
599e0a22 BF |
2054 | same_clid(clientid_t *cl1, clientid_t *cl2) |
2055 | { | |
2056 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
2057 | } |
2058 | ||
8fbba96e BF |
2059 | static bool groups_equal(struct group_info *g1, struct group_info *g2) |
2060 | { | |
2061 | int i; | |
2062 | ||
2063 | if (g1->ngroups != g2->ngroups) | |
2064 | return false; | |
2065 | for (i=0; i<g1->ngroups; i++) | |
81243eac | 2066 | if (!gid_eq(g1->gid[i], g2->gid[i])) |
8fbba96e BF |
2067 | return false; |
2068 | return true; | |
2069 | } | |
2070 | ||
68eb3508 BF |
2071 | /* |
2072 | * RFC 3530 language requires clid_inuse be returned when the | |
2073 | * "principal" associated with a requests differs from that previously | |
2074 | * used. We use uid, gid's, and gss principal string as our best | |
2075 | * approximation. We also don't want to allow non-gss use of a client | |
2076 | * established using gss: in theory cr_principal should catch that | |
2077 | * change, but in practice cr_principal can be null even in the gss case | |
2078 | * since gssd doesn't always pass down a principal string. | |
2079 | */ | |
2080 | static bool is_gss_cred(struct svc_cred *cr) | |
2081 | { | |
2082 | /* Is cr_flavor one of the gss "pseudoflavors"?: */ | |
2083 | return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR); | |
2084 | } | |
2085 | ||
2086 | ||
5559b50a | 2087 | static bool |
599e0a22 BF |
2088 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
2089 | { | |
68eb3508 | 2090 | if ((is_gss_cred(cr1) != is_gss_cred(cr2)) |
6fab8779 EB |
2091 | || (!uid_eq(cr1->cr_uid, cr2->cr_uid)) |
2092 | || (!gid_eq(cr1->cr_gid, cr2->cr_gid)) | |
8fbba96e BF |
2093 | || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) |
2094 | return false; | |
9abdda5d | 2095 | /* XXX: check that cr_targ_princ fields match ? */ |
8fbba96e BF |
2096 | if (cr1->cr_principal == cr2->cr_principal) |
2097 | return true; | |
2098 | if (!cr1->cr_principal || !cr2->cr_principal) | |
2099 | return false; | |
5559b50a | 2100 | return 0 == strcmp(cr1->cr_principal, cr2->cr_principal); |
1da177e4 LT |
2101 | } |
2102 | ||
57266a6e BF |
2103 | static bool svc_rqst_integrity_protected(struct svc_rqst *rqstp) |
2104 | { | |
2105 | struct svc_cred *cr = &rqstp->rq_cred; | |
2106 | u32 service; | |
2107 | ||
c4720591 BF |
2108 | if (!cr->cr_gss_mech) |
2109 | return false; | |
57266a6e BF |
2110 | service = gss_pseudoflavor_to_service(cr->cr_gss_mech, cr->cr_flavor); |
2111 | return service == RPC_GSS_SVC_INTEGRITY || | |
2112 | service == RPC_GSS_SVC_PRIVACY; | |
2113 | } | |
2114 | ||
dedeb13f | 2115 | bool nfsd4_mach_creds_match(struct nfs4_client *cl, struct svc_rqst *rqstp) |
57266a6e BF |
2116 | { |
2117 | struct svc_cred *cr = &rqstp->rq_cred; | |
2118 | ||
2119 | if (!cl->cl_mach_cred) | |
2120 | return true; | |
2121 | if (cl->cl_cred.cr_gss_mech != cr->cr_gss_mech) | |
2122 | return false; | |
2123 | if (!svc_rqst_integrity_protected(rqstp)) | |
2124 | return false; | |
414ca017 BF |
2125 | if (cl->cl_cred.cr_raw_principal) |
2126 | return 0 == strcmp(cl->cl_cred.cr_raw_principal, | |
2127 | cr->cr_raw_principal); | |
57266a6e BF |
2128 | if (!cr->cr_principal) |
2129 | return false; | |
2130 | return 0 == strcmp(cl->cl_cred.cr_principal, cr->cr_principal); | |
2131 | } | |
2132 | ||
294ac32e | 2133 | static void gen_confirm(struct nfs4_client *clp, struct nfsd_net *nn) |
deda2faa | 2134 | { |
ab4684d1 | 2135 | __be32 verf[2]; |
1da177e4 | 2136 | |
f419992c JL |
2137 | /* |
2138 | * This is opaque to client, so no need to byte-swap. Use | |
2139 | * __force to keep sparse happy | |
2140 | */ | |
2141 | verf[0] = (__force __be32)get_seconds(); | |
19311aa8 | 2142 | verf[1] = (__force __be32)nn->clverifier_counter++; |
ab4684d1 | 2143 | memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); |
1da177e4 LT |
2144 | } |
2145 | ||
294ac32e JL |
2146 | static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn) |
2147 | { | |
2148 | clp->cl_clientid.cl_boot = nn->boot_time; | |
2149 | clp->cl_clientid.cl_id = nn->clientid_counter++; | |
2150 | gen_confirm(clp, nn); | |
2151 | } | |
2152 | ||
4770d722 JL |
2153 | static struct nfs4_stid * |
2154 | find_stateid_locked(struct nfs4_client *cl, stateid_t *t) | |
4581d140 | 2155 | { |
3abdb607 BF |
2156 | struct nfs4_stid *ret; |
2157 | ||
2158 | ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id); | |
2159 | if (!ret || !ret->sc_type) | |
2160 | return NULL; | |
2161 | return ret; | |
4d71ab87 BF |
2162 | } |
2163 | ||
4770d722 JL |
2164 | static struct nfs4_stid * |
2165 | find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) | |
f459e453 BF |
2166 | { |
2167 | struct nfs4_stid *s; | |
4d71ab87 | 2168 | |
4770d722 JL |
2169 | spin_lock(&cl->cl_lock); |
2170 | s = find_stateid_locked(cl, t); | |
2d3f9668 TM |
2171 | if (s != NULL) { |
2172 | if (typemask & s->sc_type) | |
a15dfcd5 | 2173 | refcount_inc(&s->sc_count); |
2d3f9668 TM |
2174 | else |
2175 | s = NULL; | |
2176 | } | |
4770d722 JL |
2177 | spin_unlock(&cl->cl_lock); |
2178 | return s; | |
4581d140 BF |
2179 | } |
2180 | ||
2216d449 | 2181 | static struct nfs4_client *create_client(struct xdr_netobj name, |
b09333c4 RL |
2182 | struct svc_rqst *rqstp, nfs4_verifier *verf) |
2183 | { | |
2184 | struct nfs4_client *clp; | |
2185 | struct sockaddr *sa = svc_addr(rqstp); | |
03a4e1f6 | 2186 | int ret; |
c212cecf | 2187 | struct net *net = SVC_NET(rqstp); |
b09333c4 RL |
2188 | |
2189 | clp = alloc_client(name); | |
2190 | if (clp == NULL) | |
2191 | return NULL; | |
2192 | ||
03a4e1f6 BF |
2193 | ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); |
2194 | if (ret) { | |
03a4e1f6 | 2195 | free_client(clp); |
03a4e1f6 | 2196 | return NULL; |
b09333c4 | 2197 | } |
0162ac2b | 2198 | nfsd4_init_cb(&clp->cl_cb_null, clp, NULL, NFSPROC4_CLNT_CB_NULL); |
07cd4909 | 2199 | clp->cl_time = get_seconds(); |
b09333c4 | 2200 | clear_bit(0, &clp->cl_cb_slot_busy); |
b09333c4 RL |
2201 | copy_verf(clp, verf); |
2202 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
edd76786 | 2203 | clp->cl_cb_session = NULL; |
c212cecf | 2204 | clp->net = net; |
b09333c4 RL |
2205 | return clp; |
2206 | } | |
2207 | ||
fd39ca9a | 2208 | static void |
ac55fdc4 JL |
2209 | add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root) |
2210 | { | |
2211 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
2212 | struct nfs4_client *clp; | |
2213 | ||
2214 | while (*new) { | |
2215 | clp = rb_entry(*new, struct nfs4_client, cl_namenode); | |
2216 | parent = *new; | |
2217 | ||
2218 | if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0) | |
2219 | new = &((*new)->rb_left); | |
2220 | else | |
2221 | new = &((*new)->rb_right); | |
2222 | } | |
2223 | ||
2224 | rb_link_node(&new_clp->cl_namenode, parent, new); | |
2225 | rb_insert_color(&new_clp->cl_namenode, root); | |
2226 | } | |
2227 | ||
2228 | static struct nfs4_client * | |
2229 | find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root) | |
2230 | { | |
ef17af2a | 2231 | int cmp; |
ac55fdc4 JL |
2232 | struct rb_node *node = root->rb_node; |
2233 | struct nfs4_client *clp; | |
2234 | ||
2235 | while (node) { | |
2236 | clp = rb_entry(node, struct nfs4_client, cl_namenode); | |
2237 | cmp = compare_blob(&clp->cl_name, name); | |
2238 | if (cmp > 0) | |
2239 | node = node->rb_left; | |
2240 | else if (cmp < 0) | |
2241 | node = node->rb_right; | |
2242 | else | |
2243 | return clp; | |
2244 | } | |
2245 | return NULL; | |
2246 | } | |
2247 | ||
2248 | static void | |
2249 | add_to_unconfirmed(struct nfs4_client *clp) | |
1da177e4 LT |
2250 | { |
2251 | unsigned int idhashval; | |
0a7ec377 | 2252 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 2253 | |
0a880a28 TM |
2254 | lockdep_assert_held(&nn->client_lock); |
2255 | ||
ac55fdc4 | 2256 | clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
a99454aa | 2257 | add_clp_to_name_tree(clp, &nn->unconf_name_tree); |
1da177e4 | 2258 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
0a7ec377 | 2259 | list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]); |
3dbacee6 | 2260 | renew_client_locked(clp); |
1da177e4 LT |
2261 | } |
2262 | ||
fd39ca9a | 2263 | static void |
1da177e4 LT |
2264 | move_to_confirmed(struct nfs4_client *clp) |
2265 | { | |
2266 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
8daae4dc | 2267 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 2268 | |
0a880a28 TM |
2269 | lockdep_assert_held(&nn->client_lock); |
2270 | ||
1da177e4 | 2271 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); |
8daae4dc | 2272 | list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]); |
a99454aa | 2273 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
382a62e7 | 2274 | add_clp_to_name_tree(clp, &nn->conf_name_tree); |
ac55fdc4 | 2275 | set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
3dbacee6 | 2276 | renew_client_locked(clp); |
1da177e4 LT |
2277 | } |
2278 | ||
2279 | static struct nfs4_client * | |
bfa85e83 | 2280 | find_client_in_id_table(struct list_head *tbl, clientid_t *clid, bool sessions) |
1da177e4 LT |
2281 | { |
2282 | struct nfs4_client *clp; | |
2283 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
2284 | ||
bfa85e83 | 2285 | list_for_each_entry(clp, &tbl[idhashval], cl_idhash) { |
a50d2ad1 | 2286 | if (same_clid(&clp->cl_clientid, clid)) { |
d15c077e BF |
2287 | if ((bool)clp->cl_minorversion != sessions) |
2288 | return NULL; | |
3dbacee6 | 2289 | renew_client_locked(clp); |
1da177e4 | 2290 | return clp; |
a50d2ad1 | 2291 | } |
1da177e4 LT |
2292 | } |
2293 | return NULL; | |
2294 | } | |
2295 | ||
bfa85e83 BF |
2296 | static struct nfs4_client * |
2297 | find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) | |
2298 | { | |
2299 | struct list_head *tbl = nn->conf_id_hashtbl; | |
2300 | ||
0a880a28 | 2301 | lockdep_assert_held(&nn->client_lock); |
bfa85e83 BF |
2302 | return find_client_in_id_table(tbl, clid, sessions); |
2303 | } | |
2304 | ||
1da177e4 | 2305 | static struct nfs4_client * |
0a7ec377 | 2306 | find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
1da177e4 | 2307 | { |
bfa85e83 | 2308 | struct list_head *tbl = nn->unconf_id_hashtbl; |
1da177e4 | 2309 | |
0a880a28 | 2310 | lockdep_assert_held(&nn->client_lock); |
bfa85e83 | 2311 | return find_client_in_id_table(tbl, clid, sessions); |
1da177e4 LT |
2312 | } |
2313 | ||
6e5f15c9 | 2314 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 2315 | { |
6e5f15c9 | 2316 | return clp->cl_exchange_flags != 0; |
e203d506 | 2317 | } |
a1bcecd2 | 2318 | |
28ce6054 | 2319 | static struct nfs4_client * |
382a62e7 | 2320 | find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 2321 | { |
0a880a28 | 2322 | lockdep_assert_held(&nn->client_lock); |
382a62e7 | 2323 | return find_clp_in_name_tree(name, &nn->conf_name_tree); |
28ce6054 N |
2324 | } |
2325 | ||
2326 | static struct nfs4_client * | |
a99454aa | 2327 | find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 2328 | { |
0a880a28 | 2329 | lockdep_assert_held(&nn->client_lock); |
a99454aa | 2330 | return find_clp_in_name_tree(name, &nn->unconf_name_tree); |
28ce6054 N |
2331 | } |
2332 | ||
fd39ca9a | 2333 | static void |
6f3d772f | 2334 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 2335 | { |
07263f1e | 2336 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
2337 | struct sockaddr *sa = svc_addr(rqstp); |
2338 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
2339 | unsigned short expected_family; |
2340 | ||
2341 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
2342 | if (se->se_callback_netid_len == 3 && | |
2343 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
2344 | expected_family = AF_INET; | |
2345 | else if (se->se_callback_netid_len == 4 && | |
2346 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
2347 | expected_family = AF_INET6; | |
2348 | else | |
1da177e4 LT |
2349 | goto out_err; |
2350 | ||
c212cecf | 2351 | conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val, |
aa9a4ec7 | 2352 | se->se_callback_addr_len, |
07263f1e BF |
2353 | (struct sockaddr *)&conn->cb_addr, |
2354 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 2355 | |
07263f1e | 2356 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 2357 | goto out_err; |
aa9a4ec7 | 2358 | |
07263f1e BF |
2359 | if (conn->cb_addr.ss_family == AF_INET6) |
2360 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 2361 | |
07263f1e BF |
2362 | conn->cb_prog = se->se_callback_prog; |
2363 | conn->cb_ident = se->se_callback_ident; | |
849a1cf1 | 2364 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
1da177e4 LT |
2365 | return; |
2366 | out_err: | |
07263f1e BF |
2367 | conn->cb_addr.ss_family = AF_UNSPEC; |
2368 | conn->cb_addrlen = 0; | |
4ab495bf | 2369 | dprintk("NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
2370 | "will not receive delegations\n", |
2371 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
2372 | ||
1da177e4 LT |
2373 | return; |
2374 | } | |
2375 | ||
074fe897 | 2376 | /* |
067e1ace | 2377 | * Cache a reply. nfsd4_check_resp_size() has bounded the cache size. |
074fe897 | 2378 | */ |
b607664e | 2379 | static void |
074fe897 | 2380 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) |
074fe897 | 2381 | { |
f5236013 | 2382 | struct xdr_buf *buf = resp->xdr.buf; |
557ce264 AA |
2383 | struct nfsd4_slot *slot = resp->cstate.slot; |
2384 | unsigned int base; | |
074fe897 | 2385 | |
557ce264 | 2386 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 2387 | |
085def3a | 2388 | slot->sl_flags |= NFSD4_SLOT_INITIALIZED; |
557ce264 AA |
2389 | slot->sl_opcnt = resp->opcnt; |
2390 | slot->sl_status = resp->cstate.status; | |
53da6a53 BF |
2391 | free_svc_cred(&slot->sl_cred); |
2392 | copy_cred(&slot->sl_cred, &resp->rqstp->rq_cred); | |
074fe897 | 2393 | |
085def3a BF |
2394 | if (!nfsd4_cache_this(resp)) { |
2395 | slot->sl_flags &= ~NFSD4_SLOT_CACHED; | |
bf864a31 | 2396 | return; |
074fe897 | 2397 | } |
085def3a BF |
2398 | slot->sl_flags |= NFSD4_SLOT_CACHED; |
2399 | ||
f5236013 BF |
2400 | base = resp->cstate.data_offset; |
2401 | slot->sl_datalen = buf->len - base; | |
2402 | if (read_bytes_from_xdr_buf(buf, base, slot->sl_data, slot->sl_datalen)) | |
d3f03403 DC |
2403 | WARN(1, "%s: sessions DRC could not cache compound\n", |
2404 | __func__); | |
557ce264 | 2405 | return; |
074fe897 AA |
2406 | } |
2407 | ||
2408 | /* | |
abfabf8c AA |
2409 | * Encode the replay sequence operation from the slot values. |
2410 | * If cachethis is FALSE encode the uncached rep error on the next | |
2411 | * operation which sets resp->p and increments resp->opcnt for | |
2412 | * nfs4svc_encode_compoundres. | |
074fe897 | 2413 | * |
074fe897 | 2414 | */ |
abfabf8c AA |
2415 | static __be32 |
2416 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
2417 | struct nfsd4_compoundres *resp) | |
074fe897 | 2418 | { |
abfabf8c AA |
2419 | struct nfsd4_op *op; |
2420 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 2421 | |
abfabf8c AA |
2422 | /* Encode the replayed sequence operation */ |
2423 | op = &args->ops[resp->opcnt - 1]; | |
2424 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 2425 | |
085def3a BF |
2426 | if (slot->sl_flags & NFSD4_SLOT_CACHED) |
2427 | return op->status; | |
2428 | if (args->opcnt == 1) { | |
2429 | /* | |
2430 | * The original operation wasn't a solo sequence--we | |
2431 | * always cache those--so this retry must not match the | |
2432 | * original: | |
2433 | */ | |
2434 | op->status = nfserr_seq_false_retry; | |
2435 | } else { | |
abfabf8c AA |
2436 | op = &args->ops[resp->opcnt++]; |
2437 | op->status = nfserr_retry_uncached_rep; | |
2438 | nfsd4_encode_operation(resp, op); | |
074fe897 | 2439 | } |
abfabf8c | 2440 | return op->status; |
074fe897 AA |
2441 | } |
2442 | ||
2443 | /* | |
557ce264 AA |
2444 | * The sequence operation is not cached because we can use the slot and |
2445 | * session values. | |
074fe897 | 2446 | */ |
3ca2eb98 | 2447 | static __be32 |
bf864a31 AA |
2448 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
2449 | struct nfsd4_sequence *seq) | |
074fe897 | 2450 | { |
557ce264 | 2451 | struct nfsd4_slot *slot = resp->cstate.slot; |
f5236013 BF |
2452 | struct xdr_stream *xdr = &resp->xdr; |
2453 | __be32 *p; | |
074fe897 AA |
2454 | __be32 status; |
2455 | ||
557ce264 | 2456 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 2457 | |
abfabf8c | 2458 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); |
0da7b19c | 2459 | if (status) |
abfabf8c | 2460 | return status; |
074fe897 | 2461 | |
f5236013 BF |
2462 | p = xdr_reserve_space(xdr, slot->sl_datalen); |
2463 | if (!p) { | |
2464 | WARN_ON_ONCE(1); | |
2465 | return nfserr_serverfault; | |
2466 | } | |
2467 | xdr_encode_opaque_fixed(p, slot->sl_data, slot->sl_datalen); | |
2468 | xdr_commit_encode(xdr); | |
074fe897 | 2469 | |
557ce264 | 2470 | resp->opcnt = slot->sl_opcnt; |
f5236013 | 2471 | return slot->sl_status; |
074fe897 AA |
2472 | } |
2473 | ||
0733d213 AA |
2474 | /* |
2475 | * Set the exchange_id flags returned by the server. | |
2476 | */ | |
2477 | static void | |
2478 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
2479 | { | |
9cf514cc CH |
2480 | #ifdef CONFIG_NFSD_PNFS |
2481 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_PNFS_MDS; | |
2482 | #else | |
0733d213 | 2483 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; |
9cf514cc | 2484 | #endif |
0733d213 AA |
2485 | |
2486 | /* Referrals are supported, Migration is not. */ | |
2487 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
2488 | ||
2489 | /* set the wire flags to return to client. */ | |
2490 | clid->flags = new->cl_exchange_flags; | |
2491 | } | |
2492 | ||
4eaea134 BF |
2493 | static bool client_has_openowners(struct nfs4_client *clp) |
2494 | { | |
2495 | struct nfs4_openowner *oo; | |
2496 | ||
2497 | list_for_each_entry(oo, &clp->cl_openowners, oo_perclient) { | |
2498 | if (!list_empty(&oo->oo_owner.so_stateids)) | |
2499 | return true; | |
2500 | } | |
2501 | return false; | |
2502 | } | |
2503 | ||
631fc9ea BF |
2504 | static bool client_has_state(struct nfs4_client *clp) |
2505 | { | |
4eaea134 | 2506 | return client_has_openowners(clp) |
47e970be KM |
2507 | #ifdef CONFIG_NFSD_PNFS |
2508 | || !list_empty(&clp->cl_lo_states) | |
2509 | #endif | |
6eccece9 | 2510 | || !list_empty(&clp->cl_delegations) |
e0639dc5 OK |
2511 | || !list_empty(&clp->cl_sessions) |
2512 | || !list_empty(&clp->async_copies); | |
631fc9ea BF |
2513 | } |
2514 | ||
069b6ad4 | 2515 | __be32 |
eb69853d CH |
2516 | nfsd4_exchange_id(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2517 | union nfsd4_op_u *u) | |
069b6ad4 | 2518 | { |
eb69853d | 2519 | struct nfsd4_exchange_id *exid = &u->exchange_id; |
3dbacee6 TM |
2520 | struct nfs4_client *conf, *new; |
2521 | struct nfs4_client *unconf = NULL; | |
57b7b43b | 2522 | __be32 status; |
363168b4 | 2523 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 2524 | nfs4_verifier verf = exid->verifier; |
363168b4 | 2525 | struct sockaddr *sa = svc_addr(rqstp); |
83e08fd4 | 2526 | bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; |
c212cecf | 2527 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
0733d213 | 2528 | |
363168b4 | 2529 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 2530 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 2531 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 2532 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 2533 | addr_str, exid->flags, exid->spa_how); |
0733d213 | 2534 | |
a084daf5 | 2535 | if (exid->flags & ~EXCHGID4_FLAG_MASK_A) |
0733d213 AA |
2536 | return nfserr_inval; |
2537 | ||
50c7b948 BF |
2538 | new = create_client(exid->clname, rqstp, &verf); |
2539 | if (new == NULL) | |
2540 | return nfserr_jukebox; | |
2541 | ||
0733d213 | 2542 | switch (exid->spa_how) { |
57266a6e | 2543 | case SP4_MACH_CRED: |
ed941643 AE |
2544 | exid->spo_must_enforce[0] = 0; |
2545 | exid->spo_must_enforce[1] = ( | |
2546 | 1 << (OP_BIND_CONN_TO_SESSION - 32) | | |
2547 | 1 << (OP_EXCHANGE_ID - 32) | | |
2548 | 1 << (OP_CREATE_SESSION - 32) | | |
2549 | 1 << (OP_DESTROY_SESSION - 32) | | |
2550 | 1 << (OP_DESTROY_CLIENTID - 32)); | |
2551 | ||
2552 | exid->spo_must_allow[0] &= (1 << (OP_CLOSE) | | |
2553 | 1 << (OP_OPEN_DOWNGRADE) | | |
2554 | 1 << (OP_LOCKU) | | |
2555 | 1 << (OP_DELEGRETURN)); | |
2556 | ||
2557 | exid->spo_must_allow[1] &= ( | |
2558 | 1 << (OP_TEST_STATEID - 32) | | |
2559 | 1 << (OP_FREE_STATEID - 32)); | |
50c7b948 BF |
2560 | if (!svc_rqst_integrity_protected(rqstp)) { |
2561 | status = nfserr_inval; | |
2562 | goto out_nolock; | |
920dd9bb BF |
2563 | } |
2564 | /* | |
2565 | * Sometimes userspace doesn't give us a principal. | |
2566 | * Which is a bug, really. Anyway, we can't enforce | |
2567 | * MACH_CRED in that case, better to give up now: | |
2568 | */ | |
414ca017 BF |
2569 | if (!new->cl_cred.cr_principal && |
2570 | !new->cl_cred.cr_raw_principal) { | |
920dd9bb BF |
2571 | status = nfserr_serverfault; |
2572 | goto out_nolock; | |
50c7b948 BF |
2573 | } |
2574 | new->cl_mach_cred = true; | |
0733d213 AA |
2575 | case SP4_NONE: |
2576 | break; | |
063b0fb9 BF |
2577 | default: /* checked by xdr code */ |
2578 | WARN_ON_ONCE(1); | |
0733d213 | 2579 | case SP4_SSV: |
8edf4b02 KM |
2580 | status = nfserr_encr_alg_unsupp; |
2581 | goto out_nolock; | |
0733d213 AA |
2582 | } |
2583 | ||
2dbb269d | 2584 | /* Cases below refer to rfc 5661 section 18.35.4: */ |
3dbacee6 | 2585 | spin_lock(&nn->client_lock); |
382a62e7 | 2586 | conf = find_confirmed_client_by_name(&exid->clname, nn); |
0733d213 | 2587 | if (conf) { |
83e08fd4 BF |
2588 | bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); |
2589 | bool verfs_match = same_verf(&verf, &conf->cl_verifier); | |
2590 | ||
136e658d BF |
2591 | if (update) { |
2592 | if (!clp_used_exchangeid(conf)) { /* buggy client */ | |
2dbb269d | 2593 | status = nfserr_inval; |
1a308118 BF |
2594 | goto out; |
2595 | } | |
dedeb13f | 2596 | if (!nfsd4_mach_creds_match(conf, rqstp)) { |
57266a6e BF |
2597 | status = nfserr_wrong_cred; |
2598 | goto out; | |
2599 | } | |
136e658d | 2600 | if (!creds_match) { /* case 9 */ |
ea236d07 | 2601 | status = nfserr_perm; |
136e658d BF |
2602 | goto out; |
2603 | } | |
2604 | if (!verfs_match) { /* case 8 */ | |
0733d213 AA |
2605 | status = nfserr_not_same; |
2606 | goto out; | |
2607 | } | |
136e658d BF |
2608 | /* case 6 */ |
2609 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
136e658d | 2610 | goto out_copy; |
0733d213 | 2611 | } |
136e658d | 2612 | if (!creds_match) { /* case 3 */ |
631fc9ea BF |
2613 | if (client_has_state(conf)) { |
2614 | status = nfserr_clid_inuse; | |
0733d213 AA |
2615 | goto out; |
2616 | } | |
0733d213 AA |
2617 | goto out_new; |
2618 | } | |
136e658d | 2619 | if (verfs_match) { /* case 2 */ |
0f1ba0ef | 2620 | conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; |
136e658d BF |
2621 | goto out_copy; |
2622 | } | |
2623 | /* case 5, client reboot */ | |
3dbacee6 | 2624 | conf = NULL; |
136e658d | 2625 | goto out_new; |
6ddbbbfe MS |
2626 | } |
2627 | ||
2dbb269d | 2628 | if (update) { /* case 7 */ |
6ddbbbfe MS |
2629 | status = nfserr_noent; |
2630 | goto out; | |
0733d213 AA |
2631 | } |
2632 | ||
a99454aa | 2633 | unconf = find_unconfirmed_client_by_name(&exid->clname, nn); |
2dbb269d | 2634 | if (unconf) /* case 4, possible retry or client restart */ |
3dbacee6 | 2635 | unhash_client_locked(unconf); |
0733d213 | 2636 | |
2dbb269d | 2637 | /* case 1 (normal case) */ |
0733d213 | 2638 | out_new: |
fd699b8a JL |
2639 | if (conf) { |
2640 | status = mark_client_expired_locked(conf); | |
2641 | if (status) | |
2642 | goto out; | |
2643 | } | |
4f540e29 | 2644 | new->cl_minorversion = cstate->minorversion; |
ed941643 AE |
2645 | new->cl_spo_must_allow.u.words[0] = exid->spo_must_allow[0]; |
2646 | new->cl_spo_must_allow.u.words[1] = exid->spo_must_allow[1]; | |
0733d213 | 2647 | |
c212cecf | 2648 | gen_clid(new, nn); |
ac55fdc4 | 2649 | add_to_unconfirmed(new); |
3dbacee6 | 2650 | swap(new, conf); |
0733d213 | 2651 | out_copy: |
5cc40fd7 TM |
2652 | exid->clientid.cl_boot = conf->cl_clientid.cl_boot; |
2653 | exid->clientid.cl_id = conf->cl_clientid.cl_id; | |
0733d213 | 2654 | |
5cc40fd7 TM |
2655 | exid->seqid = conf->cl_cs_slot.sl_seqid + 1; |
2656 | nfsd4_set_ex_flags(conf, exid); | |
0733d213 AA |
2657 | |
2658 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
5cc40fd7 | 2659 | conf->cl_cs_slot.sl_seqid, conf->cl_exchange_flags); |
0733d213 AA |
2660 | status = nfs_ok; |
2661 | ||
2662 | out: | |
3dbacee6 | 2663 | spin_unlock(&nn->client_lock); |
50c7b948 | 2664 | out_nolock: |
5cc40fd7 | 2665 | if (new) |
3dbacee6 TM |
2666 | expire_client(new); |
2667 | if (unconf) | |
2668 | expire_client(unconf); | |
0733d213 | 2669 | return status; |
069b6ad4 AA |
2670 | } |
2671 | ||
57b7b43b | 2672 | static __be32 |
88e588d5 | 2673 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 2674 | { |
88e588d5 AA |
2675 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
2676 | slot_seqid); | |
b85d4c01 BH |
2677 | |
2678 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
2679 | if (slot_inuse) { |
2680 | if (seqid == slot_seqid) | |
b85d4c01 BH |
2681 | return nfserr_jukebox; |
2682 | else | |
2683 | return nfserr_seq_misordered; | |
2684 | } | |
f6d82485 | 2685 | /* Note unsigned 32-bit arithmetic handles wraparound: */ |
88e588d5 | 2686 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 | 2687 | return nfs_ok; |
88e588d5 | 2688 | if (seqid == slot_seqid) |
b85d4c01 | 2689 | return nfserr_replay_cache; |
b85d4c01 BH |
2690 | return nfserr_seq_misordered; |
2691 | } | |
2692 | ||
49557cc7 AA |
2693 | /* |
2694 | * Cache the create session result into the create session single DRC | |
2695 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
2696 | * Do this for solo or embedded create session operations. | |
2697 | */ | |
2698 | static void | |
2699 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
57b7b43b | 2700 | struct nfsd4_clid_slot *slot, __be32 nfserr) |
49557cc7 AA |
2701 | { |
2702 | slot->sl_status = nfserr; | |
2703 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
2704 | } | |
2705 | ||
2706 | static __be32 | |
2707 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
2708 | struct nfsd4_clid_slot *slot) | |
2709 | { | |
2710 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
2711 | return slot->sl_status; | |
2712 | } | |
2713 | ||
1b74c25b MJ |
2714 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
2715 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
2716 | 1 + /* MIN tag is length with zero, only length */ \ | |
2717 | 3 + /* version, opcount, opcode */ \ | |
2718 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
2719 | /* seqid, slotID, slotID, cache */ \ | |
2720 | 4 ) * sizeof(__be32)) | |
2721 | ||
2722 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
2723 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
2724 | 1 + /* status */ \ | |
2725 | 1 + /* MIN tag is length with zero, only length */ \ | |
2726 | 3 + /* opcount, opcode, opstatus*/ \ | |
2727 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
2728 | /* seqid, slotID, slotID, slotID, status */ \ | |
2729 | 5 ) * sizeof(__be32)) | |
2730 | ||
55c760cf | 2731 | static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs *ca, struct nfsd_net *nn) |
1b74c25b | 2732 | { |
55c760cf BF |
2733 | u32 maxrpc = nn->nfsd_serv->sv_max_mesg; |
2734 | ||
373cd409 BF |
2735 | if (ca->maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ) |
2736 | return nfserr_toosmall; | |
2737 | if (ca->maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ) | |
2738 | return nfserr_toosmall; | |
55c760cf BF |
2739 | ca->headerpadsz = 0; |
2740 | ca->maxreq_sz = min_t(u32, ca->maxreq_sz, maxrpc); | |
2741 | ca->maxresp_sz = min_t(u32, ca->maxresp_sz, maxrpc); | |
2742 | ca->maxops = min_t(u32, ca->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
2743 | ca->maxresp_cached = min_t(u32, ca->maxresp_cached, | |
2744 | NFSD_SLOT_CACHE_SIZE + NFSD_MIN_HDR_SEQ_SZ); | |
2745 | ca->maxreqs = min_t(u32, ca->maxreqs, NFSD_MAX_SLOTS_PER_SESSION); | |
2746 | /* | |
2747 | * Note decreasing slot size below client's request may make it | |
2748 | * difficult for client to function correctly, whereas | |
2749 | * decreasing the number of slots will (just?) affect | |
2750 | * performance. When short on memory we therefore prefer to | |
2751 | * decrease number of slots instead of their size. Clients that | |
2752 | * request larger slots than they need will get poor results: | |
2753 | */ | |
2754 | ca->maxreqs = nfsd4_get_drc_mem(ca); | |
2755 | if (!ca->maxreqs) | |
2756 | return nfserr_jukebox; | |
2757 | ||
373cd409 | 2758 | return nfs_ok; |
1b74c25b MJ |
2759 | } |
2760 | ||
4500632f CL |
2761 | /* |
2762 | * Server's NFSv4.1 backchannel support is AUTH_SYS-only for now. | |
2763 | * These are based on similar macros in linux/sunrpc/msg_prot.h . | |
2764 | */ | |
2765 | #define RPC_MAX_HEADER_WITH_AUTH_SYS \ | |
2766 | (RPC_CALLHDRSIZE + 2 * (2 + UNX_CALLSLACK)) | |
2767 | ||
2768 | #define RPC_MAX_REPHEADER_WITH_AUTH_SYS \ | |
2769 | (RPC_REPHDRSIZE + (2 + NUL_REPLYSLACK)) | |
2770 | ||
8a891633 | 2771 | #define NFSD_CB_MAX_REQ_SZ ((NFS4_enc_cb_recall_sz + \ |
4500632f | 2772 | RPC_MAX_HEADER_WITH_AUTH_SYS) * sizeof(__be32)) |
8a891633 | 2773 | #define NFSD_CB_MAX_RESP_SZ ((NFS4_dec_cb_recall_sz + \ |
4500632f CL |
2774 | RPC_MAX_REPHEADER_WITH_AUTH_SYS) * \ |
2775 | sizeof(__be32)) | |
8a891633 | 2776 | |
06b332a5 | 2777 | static __be32 check_backchannel_attrs(struct nfsd4_channel_attrs *ca) |
1b74c25b | 2778 | { |
06b332a5 BF |
2779 | ca->headerpadsz = 0; |
2780 | ||
8a891633 | 2781 | if (ca->maxreq_sz < NFSD_CB_MAX_REQ_SZ) |
06b332a5 | 2782 | return nfserr_toosmall; |
8a891633 | 2783 | if (ca->maxresp_sz < NFSD_CB_MAX_RESP_SZ) |
06b332a5 BF |
2784 | return nfserr_toosmall; |
2785 | ca->maxresp_cached = 0; | |
2786 | if (ca->maxops < 2) | |
2787 | return nfserr_toosmall; | |
2788 | ||
2789 | return nfs_ok; | |
1b74c25b MJ |
2790 | } |
2791 | ||
b78724b7 BF |
2792 | static __be32 nfsd4_check_cb_sec(struct nfsd4_cb_sec *cbs) |
2793 | { | |
2794 | switch (cbs->flavor) { | |
2795 | case RPC_AUTH_NULL: | |
2796 | case RPC_AUTH_UNIX: | |
2797 | return nfs_ok; | |
2798 | default: | |
2799 | /* | |
2800 | * GSS case: the spec doesn't allow us to return this | |
2801 | * error. But it also doesn't allow us not to support | |
2802 | * GSS. | |
2803 | * I'd rather this fail hard than return some error the | |
2804 | * client might think it can already handle: | |
2805 | */ | |
2806 | return nfserr_encr_alg_unsupp; | |
2807 | } | |
2808 | } | |
2809 | ||
069b6ad4 AA |
2810 | __be32 |
2811 | nfsd4_create_session(struct svc_rqst *rqstp, | |
eb69853d | 2812 | struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) |
069b6ad4 | 2813 | { |
eb69853d | 2814 | struct nfsd4_create_session *cr_ses = &u->create_session; |
363168b4 | 2815 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 2816 | struct nfs4_client *conf, *unconf; |
d20c11d8 | 2817 | struct nfs4_client *old = NULL; |
ac7c46f2 | 2818 | struct nfsd4_session *new; |
81f0b2a4 | 2819 | struct nfsd4_conn *conn; |
49557cc7 | 2820 | struct nfsd4_clid_slot *cs_slot = NULL; |
57b7b43b | 2821 | __be32 status = 0; |
8daae4dc | 2822 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
ec6b5d7b | 2823 | |
a62573dc MJ |
2824 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
2825 | return nfserr_inval; | |
b78724b7 BF |
2826 | status = nfsd4_check_cb_sec(&cr_ses->cb_sec); |
2827 | if (status) | |
2828 | return status; | |
55c760cf | 2829 | status = check_forechannel_attrs(&cr_ses->fore_channel, nn); |
06b332a5 BF |
2830 | if (status) |
2831 | return status; | |
2832 | status = check_backchannel_attrs(&cr_ses->back_channel); | |
373cd409 | 2833 | if (status) |
f403e450 | 2834 | goto out_release_drc_mem; |
81f0b2a4 | 2835 | status = nfserr_jukebox; |
60810e54 | 2836 | new = alloc_session(&cr_ses->fore_channel, &cr_ses->back_channel); |
55c760cf BF |
2837 | if (!new) |
2838 | goto out_release_drc_mem; | |
81f0b2a4 BF |
2839 | conn = alloc_conn_from_crses(rqstp, cr_ses); |
2840 | if (!conn) | |
2841 | goto out_free_session; | |
a62573dc | 2842 | |
d20c11d8 | 2843 | spin_lock(&nn->client_lock); |
0a7ec377 | 2844 | unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn); |
8daae4dc | 2845 | conf = find_confirmed_client(&cr_ses->clientid, true, nn); |
78389046 | 2846 | WARN_ON_ONCE(conf && unconf); |
ec6b5d7b AA |
2847 | |
2848 | if (conf) { | |
57266a6e | 2849 | status = nfserr_wrong_cred; |
dedeb13f | 2850 | if (!nfsd4_mach_creds_match(conf, rqstp)) |
57266a6e | 2851 | goto out_free_conn; |
49557cc7 AA |
2852 | cs_slot = &conf->cl_cs_slot; |
2853 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
f5e22bb6 KM |
2854 | if (status) { |
2855 | if (status == nfserr_replay_cache) | |
2856 | status = nfsd4_replay_create_session(cr_ses, cs_slot); | |
81f0b2a4 | 2857 | goto out_free_conn; |
ec6b5d7b | 2858 | } |
ec6b5d7b AA |
2859 | } else if (unconf) { |
2860 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || | |
363168b4 | 2861 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b | 2862 | status = nfserr_clid_inuse; |
81f0b2a4 | 2863 | goto out_free_conn; |
ec6b5d7b | 2864 | } |
57266a6e | 2865 | status = nfserr_wrong_cred; |
dedeb13f | 2866 | if (!nfsd4_mach_creds_match(unconf, rqstp)) |
57266a6e | 2867 | goto out_free_conn; |
49557cc7 AA |
2868 | cs_slot = &unconf->cl_cs_slot; |
2869 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
2870 | if (status) { |
2871 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 2872 | status = nfserr_seq_misordered; |
81f0b2a4 | 2873 | goto out_free_conn; |
ec6b5d7b | 2874 | } |
382a62e7 | 2875 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
221a6876 | 2876 | if (old) { |
d20c11d8 | 2877 | status = mark_client_expired_locked(old); |
7abea1e8 JL |
2878 | if (status) { |
2879 | old = NULL; | |
221a6876 | 2880 | goto out_free_conn; |
7abea1e8 | 2881 | } |
221a6876 | 2882 | } |
8f9d3d3b | 2883 | move_to_confirmed(unconf); |
ec6b5d7b AA |
2884 | conf = unconf; |
2885 | } else { | |
2886 | status = nfserr_stale_clientid; | |
81f0b2a4 | 2887 | goto out_free_conn; |
ec6b5d7b | 2888 | } |
81f0b2a4 | 2889 | status = nfs_ok; |
4ce85c8c | 2890 | /* Persistent sessions are not supported */ |
408b79bc | 2891 | cr_ses->flags &= ~SESSION4_PERSIST; |
4ce85c8c | 2892 | /* Upshifting from TCP to RDMA is not supported */ |
408b79bc BF |
2893 | cr_ses->flags &= ~SESSION4_RDMA; |
2894 | ||
81f0b2a4 | 2895 | init_session(rqstp, new, conf, cr_ses); |
d20c11d8 | 2896 | nfsd4_get_session_locked(new); |
81f0b2a4 | 2897 | |
ac7c46f2 | 2898 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, |
ec6b5d7b | 2899 | NFS4_MAX_SESSIONID_LEN); |
86c3e16c | 2900 | cs_slot->sl_seqid++; |
49557cc7 | 2901 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 2902 | |
d20c11d8 | 2903 | /* cache solo and embedded create sessions under the client_lock */ |
49557cc7 | 2904 | nfsd4_cache_create_session(cr_ses, cs_slot, status); |
d20c11d8 JL |
2905 | spin_unlock(&nn->client_lock); |
2906 | /* init connection and backchannel */ | |
2907 | nfsd4_init_conn(rqstp, conn, new); | |
2908 | nfsd4_put_session(new); | |
d20c11d8 JL |
2909 | if (old) |
2910 | expire_client(old); | |
ec6b5d7b | 2911 | return status; |
81f0b2a4 | 2912 | out_free_conn: |
d20c11d8 | 2913 | spin_unlock(&nn->client_lock); |
81f0b2a4 | 2914 | free_conn(conn); |
d20c11d8 JL |
2915 | if (old) |
2916 | expire_client(old); | |
81f0b2a4 BF |
2917 | out_free_session: |
2918 | __free_session(new); | |
55c760cf BF |
2919 | out_release_drc_mem: |
2920 | nfsd4_put_drc_mem(&cr_ses->fore_channel); | |
1ca50792 | 2921 | return status; |
069b6ad4 AA |
2922 | } |
2923 | ||
1d1bc8f2 BF |
2924 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
2925 | { | |
2926 | switch (*dir) { | |
2927 | case NFS4_CDFC4_FORE: | |
2928 | case NFS4_CDFC4_BACK: | |
2929 | return nfs_ok; | |
2930 | case NFS4_CDFC4_FORE_OR_BOTH: | |
2931 | case NFS4_CDFC4_BACK_OR_BOTH: | |
2932 | *dir = NFS4_CDFC4_BOTH; | |
2933 | return nfs_ok; | |
2934 | }; | |
2935 | return nfserr_inval; | |
2936 | } | |
2937 | ||
eb69853d CH |
2938 | __be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, |
2939 | struct nfsd4_compound_state *cstate, | |
2940 | union nfsd4_op_u *u) | |
cb73a9f4 | 2941 | { |
eb69853d | 2942 | struct nfsd4_backchannel_ctl *bc = &u->backchannel_ctl; |
cb73a9f4 | 2943 | struct nfsd4_session *session = cstate->session; |
c9a49628 | 2944 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
b78724b7 | 2945 | __be32 status; |
cb73a9f4 | 2946 | |
b78724b7 BF |
2947 | status = nfsd4_check_cb_sec(&bc->bc_cb_sec); |
2948 | if (status) | |
2949 | return status; | |
c9a49628 | 2950 | spin_lock(&nn->client_lock); |
cb73a9f4 BF |
2951 | session->se_cb_prog = bc->bc_cb_program; |
2952 | session->se_cb_sec = bc->bc_cb_sec; | |
c9a49628 | 2953 | spin_unlock(&nn->client_lock); |
cb73a9f4 BF |
2954 | |
2955 | nfsd4_probe_callback(session->se_client); | |
2956 | ||
2957 | return nfs_ok; | |
2958 | } | |
2959 | ||
1d1bc8f2 BF |
2960 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, |
2961 | struct nfsd4_compound_state *cstate, | |
eb69853d | 2962 | union nfsd4_op_u *u) |
1d1bc8f2 | 2963 | { |
eb69853d | 2964 | struct nfsd4_bind_conn_to_session *bcts = &u->bind_conn_to_session; |
1d1bc8f2 | 2965 | __be32 status; |
3ba63671 | 2966 | struct nfsd4_conn *conn; |
4f6e6c17 | 2967 | struct nfsd4_session *session; |
d4e19e70 TM |
2968 | struct net *net = SVC_NET(rqstp); |
2969 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1d1bc8f2 BF |
2970 | |
2971 | if (!nfsd4_last_compound_op(rqstp)) | |
2972 | return nfserr_not_only_op; | |
c9a49628 | 2973 | spin_lock(&nn->client_lock); |
d4e19e70 | 2974 | session = find_in_sessionid_hashtbl(&bcts->sessionid, net, &status); |
c9a49628 | 2975 | spin_unlock(&nn->client_lock); |
4f6e6c17 | 2976 | if (!session) |
d4e19e70 | 2977 | goto out_no_session; |
57266a6e | 2978 | status = nfserr_wrong_cred; |
dedeb13f | 2979 | if (!nfsd4_mach_creds_match(session->se_client, rqstp)) |
57266a6e | 2980 | goto out; |
1d1bc8f2 | 2981 | status = nfsd4_map_bcts_dir(&bcts->dir); |
3ba63671 | 2982 | if (status) |
4f6e6c17 | 2983 | goto out; |
3ba63671 | 2984 | conn = alloc_conn(rqstp, bcts->dir); |
4f6e6c17 | 2985 | status = nfserr_jukebox; |
3ba63671 | 2986 | if (!conn) |
4f6e6c17 BF |
2987 | goto out; |
2988 | nfsd4_init_conn(rqstp, conn, session); | |
2989 | status = nfs_ok; | |
2990 | out: | |
d4e19e70 TM |
2991 | nfsd4_put_session(session); |
2992 | out_no_session: | |
4f6e6c17 | 2993 | return status; |
1d1bc8f2 BF |
2994 | } |
2995 | ||
665d5072 | 2996 | static bool nfsd4_compound_in_session(struct nfsd4_compound_state *cstate, struct nfs4_sessionid *sid) |
5d4cec2f | 2997 | { |
665d5072 | 2998 | if (!cstate->session) |
51d87bc2 | 2999 | return false; |
665d5072 | 3000 | return !memcmp(sid, &cstate->session->se_sessionid, sizeof(*sid)); |
5d4cec2f BF |
3001 | } |
3002 | ||
069b6ad4 | 3003 | __be32 |
eb69853d CH |
3004 | nfsd4_destroy_session(struct svc_rqst *r, struct nfsd4_compound_state *cstate, |
3005 | union nfsd4_op_u *u) | |
069b6ad4 | 3006 | { |
ca0552f4 | 3007 | struct nfs4_sessionid *sessionid = &u->destroy_session.sessionid; |
e10e0cfc | 3008 | struct nfsd4_session *ses; |
abcdff09 | 3009 | __be32 status; |
f0f51f5c | 3010 | int ref_held_by_me = 0; |
d4e19e70 TM |
3011 | struct net *net = SVC_NET(r); |
3012 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
e10e0cfc | 3013 | |
abcdff09 | 3014 | status = nfserr_not_only_op; |
ca0552f4 | 3015 | if (nfsd4_compound_in_session(cstate, sessionid)) { |
57716355 | 3016 | if (!nfsd4_last_compound_op(r)) |
abcdff09 | 3017 | goto out; |
f0f51f5c | 3018 | ref_held_by_me++; |
57716355 | 3019 | } |
ca0552f4 | 3020 | dump_sessionid(__func__, sessionid); |
c9a49628 | 3021 | spin_lock(&nn->client_lock); |
ca0552f4 | 3022 | ses = find_in_sessionid_hashtbl(sessionid, net, &status); |
abcdff09 BF |
3023 | if (!ses) |
3024 | goto out_client_lock; | |
57266a6e | 3025 | status = nfserr_wrong_cred; |
dedeb13f | 3026 | if (!nfsd4_mach_creds_match(ses->se_client, r)) |
d4e19e70 | 3027 | goto out_put_session; |
f0f51f5c | 3028 | status = mark_session_dead_locked(ses, 1 + ref_held_by_me); |
66b2b9b2 | 3029 | if (status) |
f0f51f5c | 3030 | goto out_put_session; |
e10e0cfc | 3031 | unhash_session(ses); |
c9a49628 | 3032 | spin_unlock(&nn->client_lock); |
e10e0cfc | 3033 | |
84f5f7cc | 3034 | nfsd4_probe_callback_sync(ses->se_client); |
19cf5c02 | 3035 | |
c9a49628 | 3036 | spin_lock(&nn->client_lock); |
e10e0cfc | 3037 | status = nfs_ok; |
f0f51f5c | 3038 | out_put_session: |
d4e19e70 | 3039 | nfsd4_put_session_locked(ses); |
abcdff09 BF |
3040 | out_client_lock: |
3041 | spin_unlock(&nn->client_lock); | |
e10e0cfc | 3042 | out: |
e10e0cfc | 3043 | return status; |
069b6ad4 AA |
3044 | } |
3045 | ||
a663bdd8 | 3046 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
3047 | { |
3048 | struct nfsd4_conn *c; | |
3049 | ||
3050 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 3051 | if (c->cn_xprt == xpt) { |
328ead28 BF |
3052 | return c; |
3053 | } | |
3054 | } | |
3055 | return NULL; | |
3056 | } | |
3057 | ||
57266a6e | 3058 | static __be32 nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
3059 | { |
3060 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 3061 | struct nfsd4_conn *c; |
57266a6e | 3062 | __be32 status = nfs_ok; |
21b75b01 | 3063 | int ret; |
328ead28 BF |
3064 | |
3065 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 3066 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
57266a6e BF |
3067 | if (c) |
3068 | goto out_free; | |
3069 | status = nfserr_conn_not_bound_to_session; | |
3070 | if (clp->cl_mach_cred) | |
3071 | goto out_free; | |
328ead28 BF |
3072 | __nfsd4_hash_conn(new, ses); |
3073 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
3074 | ret = nfsd4_register_conn(new); |
3075 | if (ret) | |
3076 | /* oops; xprt is already down: */ | |
3077 | nfsd4_conn_lost(&new->cn_xpt_user); | |
57266a6e BF |
3078 | return nfs_ok; |
3079 | out_free: | |
3080 | spin_unlock(&clp->cl_lock); | |
3081 | free_conn(new); | |
3082 | return status; | |
328ead28 BF |
3083 | } |
3084 | ||
868b89c3 MJ |
3085 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
3086 | { | |
3087 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
3088 | ||
3089 | return args->opcnt > session->se_fchannel.maxops; | |
3090 | } | |
3091 | ||
ae82a8d0 MJ |
3092 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
3093 | struct nfsd4_session *session) | |
3094 | { | |
3095 | struct xdr_buf *xb = &rqstp->rq_arg; | |
3096 | ||
3097 | return xb->len > session->se_fchannel.maxreq_sz; | |
3098 | } | |
3099 | ||
53da6a53 BF |
3100 | static bool replay_matches_cache(struct svc_rqst *rqstp, |
3101 | struct nfsd4_sequence *seq, struct nfsd4_slot *slot) | |
3102 | { | |
3103 | struct nfsd4_compoundargs *argp = rqstp->rq_argp; | |
3104 | ||
3105 | if ((bool)(slot->sl_flags & NFSD4_SLOT_CACHETHIS) != | |
3106 | (bool)seq->cachethis) | |
3107 | return false; | |
3108 | /* | |
3109 | * If there's an error than the reply can have fewer ops than | |
3110 | * the call. But if we cached a reply with *more* ops than the | |
3111 | * call you're sending us now, then this new call is clearly not | |
3112 | * really a replay of the old one: | |
3113 | */ | |
3114 | if (slot->sl_opcnt < argp->opcnt) | |
3115 | return false; | |
3116 | /* This is the only check explicitly called by spec: */ | |
3117 | if (!same_creds(&rqstp->rq_cred, &slot->sl_cred)) | |
3118 | return false; | |
3119 | /* | |
3120 | * There may be more comparisons we could actually do, but the | |
3121 | * spec doesn't require us to catch every case where the calls | |
3122 | * don't match (that would require caching the call as well as | |
3123 | * the reply), so we don't bother. | |
3124 | */ | |
3125 | return true; | |
3126 | } | |
3127 | ||
069b6ad4 | 3128 | __be32 |
eb69853d CH |
3129 | nfsd4_sequence(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3130 | union nfsd4_op_u *u) | |
069b6ad4 | 3131 | { |
eb69853d | 3132 | struct nfsd4_sequence *seq = &u->sequence; |
f9bb94c4 | 3133 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
47ee5298 | 3134 | struct xdr_stream *xdr = &resp->xdr; |
b85d4c01 | 3135 | struct nfsd4_session *session; |
221a6876 | 3136 | struct nfs4_client *clp; |
b85d4c01 | 3137 | struct nfsd4_slot *slot; |
a663bdd8 | 3138 | struct nfsd4_conn *conn; |
57b7b43b | 3139 | __be32 status; |
47ee5298 | 3140 | int buflen; |
d4e19e70 TM |
3141 | struct net *net = SVC_NET(rqstp); |
3142 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
b85d4c01 | 3143 | |
f9bb94c4 AA |
3144 | if (resp->opcnt != 1) |
3145 | return nfserr_sequence_pos; | |
3146 | ||
a663bdd8 BF |
3147 | /* |
3148 | * Will be either used or freed by nfsd4_sequence_check_conn | |
3149 | * below. | |
3150 | */ | |
3151 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
3152 | if (!conn) | |
3153 | return nfserr_jukebox; | |
3154 | ||
c9a49628 | 3155 | spin_lock(&nn->client_lock); |
d4e19e70 | 3156 | session = find_in_sessionid_hashtbl(&seq->sessionid, net, &status); |
b85d4c01 | 3157 | if (!session) |
221a6876 BF |
3158 | goto out_no_session; |
3159 | clp = session->se_client; | |
b85d4c01 | 3160 | |
868b89c3 MJ |
3161 | status = nfserr_too_many_ops; |
3162 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
66b2b9b2 | 3163 | goto out_put_session; |
868b89c3 | 3164 | |
ae82a8d0 MJ |
3165 | status = nfserr_req_too_big; |
3166 | if (nfsd4_request_too_big(rqstp, session)) | |
66b2b9b2 | 3167 | goto out_put_session; |
ae82a8d0 | 3168 | |
b85d4c01 | 3169 | status = nfserr_badslot; |
6c18ba9f | 3170 | if (seq->slotid >= session->se_fchannel.maxreqs) |
66b2b9b2 | 3171 | goto out_put_session; |
b85d4c01 | 3172 | |
557ce264 | 3173 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
3174 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
3175 | ||
a8dfdaeb AA |
3176 | /* We do not negotiate the number of slots yet, so set the |
3177 | * maxslots to the session maxreqs which is used to encode | |
3178 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
3179 | seq->maxslots = session->se_fchannel.maxreqs; | |
3180 | ||
73e79482 BF |
3181 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, |
3182 | slot->sl_flags & NFSD4_SLOT_INUSE); | |
b85d4c01 | 3183 | if (status == nfserr_replay_cache) { |
bf5c43c8 BF |
3184 | status = nfserr_seq_misordered; |
3185 | if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) | |
66b2b9b2 | 3186 | goto out_put_session; |
53da6a53 BF |
3187 | status = nfserr_seq_false_retry; |
3188 | if (!replay_matches_cache(rqstp, seq, slot)) | |
3189 | goto out_put_session; | |
b85d4c01 BH |
3190 | cstate->slot = slot; |
3191 | cstate->session = session; | |
4b24ca7d | 3192 | cstate->clp = clp; |
da3846a2 | 3193 | /* Return the cached reply status and set cstate->status |
557ce264 | 3194 | * for nfsd4_proc_compound processing */ |
bf864a31 | 3195 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 3196 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 3197 | goto out; |
b85d4c01 BH |
3198 | } |
3199 | if (status) | |
66b2b9b2 | 3200 | goto out_put_session; |
b85d4c01 | 3201 | |
57266a6e | 3202 | status = nfsd4_sequence_check_conn(conn, session); |
a663bdd8 | 3203 | conn = NULL; |
57266a6e BF |
3204 | if (status) |
3205 | goto out_put_session; | |
328ead28 | 3206 | |
47ee5298 BF |
3207 | buflen = (seq->cachethis) ? |
3208 | session->se_fchannel.maxresp_cached : | |
3209 | session->se_fchannel.maxresp_sz; | |
3210 | status = (seq->cachethis) ? nfserr_rep_too_big_to_cache : | |
3211 | nfserr_rep_too_big; | |
a5cddc88 | 3212 | if (xdr_restrict_buflen(xdr, buflen - rqstp->rq_auth_slack)) |
47ee5298 | 3213 | goto out_put_session; |
32aaa62e | 3214 | svc_reserve(rqstp, buflen); |
47ee5298 BF |
3215 | |
3216 | status = nfs_ok; | |
b85d4c01 | 3217 | /* Success! bump slot seqid */ |
b85d4c01 | 3218 | slot->sl_seqid = seq->seqid; |
bf5c43c8 | 3219 | slot->sl_flags |= NFSD4_SLOT_INUSE; |
73e79482 BF |
3220 | if (seq->cachethis) |
3221 | slot->sl_flags |= NFSD4_SLOT_CACHETHIS; | |
bf5c43c8 BF |
3222 | else |
3223 | slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; | |
b85d4c01 BH |
3224 | |
3225 | cstate->slot = slot; | |
3226 | cstate->session = session; | |
4b24ca7d | 3227 | cstate->clp = clp; |
b85d4c01 | 3228 | |
b85d4c01 | 3229 | out: |
221a6876 BF |
3230 | switch (clp->cl_cb_state) { |
3231 | case NFSD4_CB_DOWN: | |
3232 | seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; | |
3233 | break; | |
3234 | case NFSD4_CB_FAULT: | |
3235 | seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; | |
3236 | break; | |
3237 | default: | |
3238 | seq->status_flags = 0; | |
aaf84eb9 | 3239 | } |
3bd64a5b BF |
3240 | if (!list_empty(&clp->cl_revoked)) |
3241 | seq->status_flags |= SEQ4_STATUS_RECALLABLE_STATE_REVOKED; | |
221a6876 | 3242 | out_no_session: |
3f42d2c4 KM |
3243 | if (conn) |
3244 | free_conn(conn); | |
c9a49628 | 3245 | spin_unlock(&nn->client_lock); |
b85d4c01 | 3246 | return status; |
66b2b9b2 | 3247 | out_put_session: |
d4e19e70 | 3248 | nfsd4_put_session_locked(session); |
221a6876 | 3249 | goto out_no_session; |
069b6ad4 AA |
3250 | } |
3251 | ||
b607664e TM |
3252 | void |
3253 | nfsd4_sequence_done(struct nfsd4_compoundres *resp) | |
3254 | { | |
3255 | struct nfsd4_compound_state *cs = &resp->cstate; | |
3256 | ||
3257 | if (nfsd4_has_session(cs)) { | |
b607664e TM |
3258 | if (cs->status != nfserr_replay_cache) { |
3259 | nfsd4_store_cache_entry(resp); | |
3260 | cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE; | |
3261 | } | |
d4e19e70 | 3262 | /* Drop session reference that was taken in nfsd4_sequence() */ |
b607664e | 3263 | nfsd4_put_session(cs->session); |
4b24ca7d JL |
3264 | } else if (cs->clp) |
3265 | put_client_renew(cs->clp); | |
b607664e TM |
3266 | } |
3267 | ||
345c2842 | 3268 | __be32 |
eb69853d CH |
3269 | nfsd4_destroy_clientid(struct svc_rqst *rqstp, |
3270 | struct nfsd4_compound_state *cstate, | |
3271 | union nfsd4_op_u *u) | |
345c2842 | 3272 | { |
eb69853d | 3273 | struct nfsd4_destroy_clientid *dc = &u->destroy_clientid; |
6b10ad19 TM |
3274 | struct nfs4_client *conf, *unconf; |
3275 | struct nfs4_client *clp = NULL; | |
57b7b43b | 3276 | __be32 status = 0; |
8daae4dc | 3277 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
345c2842 | 3278 | |
6b10ad19 | 3279 | spin_lock(&nn->client_lock); |
0a7ec377 | 3280 | unconf = find_unconfirmed_client(&dc->clientid, true, nn); |
8daae4dc | 3281 | conf = find_confirmed_client(&dc->clientid, true, nn); |
78389046 | 3282 | WARN_ON_ONCE(conf && unconf); |
345c2842 MJ |
3283 | |
3284 | if (conf) { | |
c0293b01 | 3285 | if (client_has_state(conf)) { |
345c2842 MJ |
3286 | status = nfserr_clientid_busy; |
3287 | goto out; | |
3288 | } | |
fd699b8a JL |
3289 | status = mark_client_expired_locked(conf); |
3290 | if (status) | |
3291 | goto out; | |
6b10ad19 | 3292 | clp = conf; |
345c2842 MJ |
3293 | } else if (unconf) |
3294 | clp = unconf; | |
3295 | else { | |
3296 | status = nfserr_stale_clientid; | |
3297 | goto out; | |
3298 | } | |
dedeb13f | 3299 | if (!nfsd4_mach_creds_match(clp, rqstp)) { |
6b10ad19 | 3300 | clp = NULL; |
57266a6e BF |
3301 | status = nfserr_wrong_cred; |
3302 | goto out; | |
3303 | } | |
6b10ad19 | 3304 | unhash_client_locked(clp); |
345c2842 | 3305 | out: |
6b10ad19 | 3306 | spin_unlock(&nn->client_lock); |
6b10ad19 TM |
3307 | if (clp) |
3308 | expire_client(clp); | |
345c2842 MJ |
3309 | return status; |
3310 | } | |
3311 | ||
4dc6ec00 | 3312 | __be32 |
eb69853d CH |
3313 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, |
3314 | struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) | |
4dc6ec00 | 3315 | { |
eb69853d | 3316 | struct nfsd4_reclaim_complete *rc = &u->reclaim_complete; |
57b7b43b | 3317 | __be32 status = 0; |
bcecf1cc | 3318 | |
4dc6ec00 BF |
3319 | if (rc->rca_one_fs) { |
3320 | if (!cstate->current_fh.fh_dentry) | |
3321 | return nfserr_nofilehandle; | |
3322 | /* | |
3323 | * We don't take advantage of the rca_one_fs case. | |
3324 | * That's OK, it's optional, we can safely ignore it. | |
3325 | */ | |
d28c442f | 3326 | return nfs_ok; |
4dc6ec00 | 3327 | } |
bcecf1cc | 3328 | |
bcecf1cc | 3329 | status = nfserr_complete_already; |
a52d726b JL |
3330 | if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, |
3331 | &cstate->session->se_client->cl_flags)) | |
bcecf1cc MJ |
3332 | goto out; |
3333 | ||
3334 | status = nfserr_stale_clientid; | |
3335 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
3336 | /* |
3337 | * The following error isn't really legal. | |
3338 | * But we only get here if the client just explicitly | |
3339 | * destroyed the client. Surely it no longer cares what | |
3340 | * error it gets back on an operation for the dead | |
3341 | * client. | |
3342 | */ | |
bcecf1cc MJ |
3343 | goto out; |
3344 | ||
3345 | status = nfs_ok; | |
2a4317c5 | 3346 | nfsd4_client_record_create(cstate->session->se_client); |
bcecf1cc | 3347 | out: |
bcecf1cc | 3348 | return status; |
4dc6ec00 BF |
3349 | } |
3350 | ||
b37ad28b | 3351 | __be32 |
b591480b | 3352 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 3353 | union nfsd4_op_u *u) |
1da177e4 | 3354 | { |
eb69853d | 3355 | struct nfsd4_setclientid *setclid = &u->setclientid; |
a084daf5 | 3356 | struct xdr_netobj clname = setclid->se_name; |
1da177e4 | 3357 | nfs4_verifier clverifier = setclid->se_verf; |
3dbacee6 TM |
3358 | struct nfs4_client *conf, *new; |
3359 | struct nfs4_client *unconf = NULL; | |
b37ad28b | 3360 | __be32 status; |
c212cecf SK |
3361 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
3362 | ||
5cc40fd7 TM |
3363 | new = create_client(clname, rqstp, &clverifier); |
3364 | if (new == NULL) | |
3365 | return nfserr_jukebox; | |
63db4632 | 3366 | /* Cases below refer to rfc 3530 section 14.2.33: */ |
3dbacee6 | 3367 | spin_lock(&nn->client_lock); |
382a62e7 | 3368 | conf = find_confirmed_client_by_name(&clname, nn); |
2b634821 | 3369 | if (conf && client_has_state(conf)) { |
63db4632 | 3370 | /* case 0: */ |
1da177e4 | 3371 | status = nfserr_clid_inuse; |
e203d506 BF |
3372 | if (clp_used_exchangeid(conf)) |
3373 | goto out; | |
026722c2 | 3374 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
3375 | char addr_str[INET6_ADDRSTRLEN]; |
3376 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
3377 | sizeof(addr_str)); | |
3378 | dprintk("NFSD: setclientid: string in use by client " | |
3379 | "at %s\n", addr_str); | |
1da177e4 LT |
3380 | goto out; |
3381 | } | |
1da177e4 | 3382 | } |
a99454aa | 3383 | unconf = find_unconfirmed_client_by_name(&clname, nn); |
8f930711 | 3384 | if (unconf) |
3dbacee6 | 3385 | unhash_client_locked(unconf); |
41eb1670 | 3386 | if (conf && same_verf(&conf->cl_verifier, &clverifier)) { |
63db4632 | 3387 | /* case 1: probable callback update */ |
1da177e4 | 3388 | copy_clid(new, conf); |
41eb1670 KM |
3389 | gen_confirm(new, nn); |
3390 | } else /* case 4 (new client) or cases 2, 3 (client reboot): */ | |
c212cecf | 3391 | gen_clid(new, nn); |
8323c3b2 | 3392 | new->cl_minorversion = 0; |
6f3d772f | 3393 | gen_callback(new, setclid, rqstp); |
ac55fdc4 | 3394 | add_to_unconfirmed(new); |
1da177e4 LT |
3395 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
3396 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
3397 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
5cc40fd7 | 3398 | new = NULL; |
1da177e4 LT |
3399 | status = nfs_ok; |
3400 | out: | |
3dbacee6 | 3401 | spin_unlock(&nn->client_lock); |
5cc40fd7 TM |
3402 | if (new) |
3403 | free_client(new); | |
3dbacee6 TM |
3404 | if (unconf) |
3405 | expire_client(unconf); | |
1da177e4 LT |
3406 | return status; |
3407 | } | |
3408 | ||
3409 | ||
b37ad28b | 3410 | __be32 |
b591480b | 3411 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
eb69853d CH |
3412 | struct nfsd4_compound_state *cstate, |
3413 | union nfsd4_op_u *u) | |
1da177e4 | 3414 | { |
eb69853d CH |
3415 | struct nfsd4_setclientid_confirm *setclientid_confirm = |
3416 | &u->setclientid_confirm; | |
21ab45a4 | 3417 | struct nfs4_client *conf, *unconf; |
d20c11d8 | 3418 | struct nfs4_client *old = NULL; |
1da177e4 LT |
3419 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
3420 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 3421 | __be32 status; |
7f2210fa | 3422 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 3423 | |
2c142baa | 3424 | if (STALE_CLIENTID(clid, nn)) |
1da177e4 | 3425 | return nfserr_stale_clientid; |
21ab45a4 | 3426 | |
d20c11d8 | 3427 | spin_lock(&nn->client_lock); |
8daae4dc | 3428 | conf = find_confirmed_client(clid, false, nn); |
0a7ec377 | 3429 | unconf = find_unconfirmed_client(clid, false, nn); |
a186e767 | 3430 | /* |
8695b90a BF |
3431 | * We try hard to give out unique clientid's, so if we get an |
3432 | * attempt to confirm the same clientid with a different cred, | |
f984a7ce BF |
3433 | * the client may be buggy; this should never happen. |
3434 | * | |
3435 | * Nevertheless, RFC 7530 recommends INUSE for this case: | |
a186e767 | 3436 | */ |
f984a7ce | 3437 | status = nfserr_clid_inuse; |
8695b90a BF |
3438 | if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) |
3439 | goto out; | |
3440 | if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) | |
3441 | goto out; | |
63db4632 | 3442 | /* cases below refer to rfc 3530 section 14.2.34: */ |
90d700b7 | 3443 | if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) { |
7d22fc11 BF |
3444 | if (conf && same_verf(&confirm, &conf->cl_confirm)) { |
3445 | /* case 2: probable retransmit */ | |
1da177e4 | 3446 | status = nfs_ok; |
7d22fc11 | 3447 | } else /* case 4: client hasn't noticed we rebooted yet? */ |
90d700b7 BF |
3448 | status = nfserr_stale_clientid; |
3449 | goto out; | |
3450 | } | |
3451 | status = nfs_ok; | |
3452 | if (conf) { /* case 1: callback update */ | |
d20c11d8 JL |
3453 | old = unconf; |
3454 | unhash_client_locked(old); | |
8695b90a | 3455 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
90d700b7 | 3456 | } else { /* case 3: normal case; new or rebooted client */ |
d20c11d8 JL |
3457 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
3458 | if (old) { | |
2b634821 BF |
3459 | status = nfserr_clid_inuse; |
3460 | if (client_has_state(old) | |
3461 | && !same_creds(&unconf->cl_cred, | |
3462 | &old->cl_cred)) | |
3463 | goto out; | |
d20c11d8 | 3464 | status = mark_client_expired_locked(old); |
7abea1e8 JL |
3465 | if (status) { |
3466 | old = NULL; | |
221a6876 | 3467 | goto out; |
7abea1e8 | 3468 | } |
221a6876 | 3469 | } |
8695b90a | 3470 | move_to_confirmed(unconf); |
d20c11d8 | 3471 | conf = unconf; |
08e8987c | 3472 | } |
d20c11d8 JL |
3473 | get_client_locked(conf); |
3474 | spin_unlock(&nn->client_lock); | |
3475 | nfsd4_probe_callback(conf); | |
3476 | spin_lock(&nn->client_lock); | |
3477 | put_client_renew_locked(conf); | |
1da177e4 | 3478 | out: |
d20c11d8 JL |
3479 | spin_unlock(&nn->client_lock); |
3480 | if (old) | |
3481 | expire_client(old); | |
1da177e4 LT |
3482 | return status; |
3483 | } | |
3484 | ||
32513b40 BF |
3485 | static struct nfs4_file *nfsd4_alloc_file(void) |
3486 | { | |
3487 | return kmem_cache_alloc(file_slab, GFP_KERNEL); | |
3488 | } | |
3489 | ||
1da177e4 | 3490 | /* OPEN Share state helper functions */ |
5b095e99 JL |
3491 | static void nfsd4_init_file(struct knfsd_fh *fh, unsigned int hashval, |
3492 | struct nfs4_file *fp) | |
1da177e4 | 3493 | { |
950e0118 TM |
3494 | lockdep_assert_held(&state_lock); |
3495 | ||
818a34eb | 3496 | refcount_set(&fp->fi_ref, 1); |
1d31a253 | 3497 | spin_lock_init(&fp->fi_lock); |
32513b40 BF |
3498 | INIT_LIST_HEAD(&fp->fi_stateids); |
3499 | INIT_LIST_HEAD(&fp->fi_delegations); | |
8287f009 | 3500 | INIT_LIST_HEAD(&fp->fi_clnt_odstate); |
e2cf80d7 | 3501 | fh_copy_shallow(&fp->fi_fhandle, fh); |
0c637be8 | 3502 | fp->fi_deleg_file = NULL; |
32513b40 | 3503 | fp->fi_had_conflict = false; |
baeb4ff0 | 3504 | fp->fi_share_deny = 0; |
32513b40 BF |
3505 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); |
3506 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
9cf514cc CH |
3507 | #ifdef CONFIG_NFSD_PNFS |
3508 | INIT_LIST_HEAD(&fp->fi_lo_states); | |
c5c707f9 | 3509 | atomic_set(&fp->fi_lo_recalls, 0); |
9cf514cc | 3510 | #endif |
5b095e99 | 3511 | hlist_add_head_rcu(&fp->fi_hash, &file_hashtbl[hashval]); |
1da177e4 LT |
3512 | } |
3513 | ||
e8ff2a84 | 3514 | void |
1da177e4 LT |
3515 | nfsd4_free_slabs(void) |
3516 | { | |
9258a2d5 | 3517 | kmem_cache_destroy(client_slab); |
abf1135b CH |
3518 | kmem_cache_destroy(openowner_slab); |
3519 | kmem_cache_destroy(lockowner_slab); | |
3520 | kmem_cache_destroy(file_slab); | |
3521 | kmem_cache_destroy(stateid_slab); | |
3522 | kmem_cache_destroy(deleg_slab); | |
9258a2d5 | 3523 | kmem_cache_destroy(odstate_slab); |
e60d4398 | 3524 | } |
1da177e4 | 3525 | |
72083396 | 3526 | int |
e60d4398 N |
3527 | nfsd4_init_slabs(void) |
3528 | { | |
9258a2d5 JL |
3529 | client_slab = kmem_cache_create("nfsd4_clients", |
3530 | sizeof(struct nfs4_client), 0, 0, NULL); | |
3531 | if (client_slab == NULL) | |
3532 | goto out; | |
fe0750e5 BF |
3533 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
3534 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
3535 | if (openowner_slab == NULL) | |
9258a2d5 | 3536 | goto out_free_client_slab; |
fe0750e5 | 3537 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", |
3c40794b | 3538 | sizeof(struct nfs4_lockowner), 0, 0, NULL); |
fe0750e5 | 3539 | if (lockowner_slab == NULL) |
abf1135b | 3540 | goto out_free_openowner_slab; |
e60d4398 | 3541 | file_slab = kmem_cache_create("nfsd4_files", |
20c2df83 | 3542 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 | 3543 | if (file_slab == NULL) |
abf1135b | 3544 | goto out_free_lockowner_slab; |
5ac049ac | 3545 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
dcef0413 | 3546 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
5ac049ac | 3547 | if (stateid_slab == NULL) |
abf1135b | 3548 | goto out_free_file_slab; |
5b2d21c1 | 3549 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 3550 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 | 3551 | if (deleg_slab == NULL) |
abf1135b | 3552 | goto out_free_stateid_slab; |
8287f009 SB |
3553 | odstate_slab = kmem_cache_create("nfsd4_odstate", |
3554 | sizeof(struct nfs4_clnt_odstate), 0, 0, NULL); | |
3555 | if (odstate_slab == NULL) | |
3556 | goto out_free_deleg_slab; | |
e60d4398 | 3557 | return 0; |
abf1135b | 3558 | |
8287f009 SB |
3559 | out_free_deleg_slab: |
3560 | kmem_cache_destroy(deleg_slab); | |
abf1135b CH |
3561 | out_free_stateid_slab: |
3562 | kmem_cache_destroy(stateid_slab); | |
3563 | out_free_file_slab: | |
3564 | kmem_cache_destroy(file_slab); | |
3565 | out_free_lockowner_slab: | |
3566 | kmem_cache_destroy(lockowner_slab); | |
3567 | out_free_openowner_slab: | |
3568 | kmem_cache_destroy(openowner_slab); | |
9258a2d5 JL |
3569 | out_free_client_slab: |
3570 | kmem_cache_destroy(client_slab); | |
abf1135b | 3571 | out: |
e60d4398 N |
3572 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); |
3573 | return -ENOMEM; | |
1da177e4 LT |
3574 | } |
3575 | ||
ff194bd9 | 3576 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 3577 | { |
ff194bd9 BF |
3578 | rp->rp_status = nfserr_serverfault; |
3579 | rp->rp_buflen = 0; | |
3580 | rp->rp_buf = rp->rp_ibuf; | |
58fb12e6 JL |
3581 | mutex_init(&rp->rp_mutex); |
3582 | } | |
3583 | ||
3584 | static void nfsd4_cstate_assign_replay(struct nfsd4_compound_state *cstate, | |
3585 | struct nfs4_stateowner *so) | |
3586 | { | |
3587 | if (!nfsd4_has_session(cstate)) { | |
3588 | mutex_lock(&so->so_replay.rp_mutex); | |
b5971afa | 3589 | cstate->replay_owner = nfs4_get_stateowner(so); |
58fb12e6 JL |
3590 | } |
3591 | } | |
3592 | ||
3593 | void nfsd4_cstate_clear_replay(struct nfsd4_compound_state *cstate) | |
3594 | { | |
3595 | struct nfs4_stateowner *so = cstate->replay_owner; | |
3596 | ||
3597 | if (so != NULL) { | |
3598 | cstate->replay_owner = NULL; | |
3599 | mutex_unlock(&so->so_replay.rp_mutex); | |
3600 | nfs4_put_stateowner(so); | |
3601 | } | |
1da177e4 LT |
3602 | } |
3603 | ||
fe0750e5 | 3604 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 3605 | { |
1da177e4 | 3606 | struct nfs4_stateowner *sop; |
1da177e4 | 3607 | |
fe0750e5 | 3608 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
3609 | if (!sop) |
3610 | return NULL; | |
3611 | ||
3612 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); | |
3613 | if (!sop->so_owner.data) { | |
fe0750e5 | 3614 | kmem_cache_free(slab, sop); |
1da177e4 | 3615 | return NULL; |
ff194bd9 BF |
3616 | } |
3617 | sop->so_owner.len = owner->len; | |
3618 | ||
ea1da636 | 3619 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 BF |
3620 | sop->so_client = clp; |
3621 | init_nfs4_replay(&sop->so_replay); | |
6b180f0b | 3622 | atomic_set(&sop->so_count, 1); |
ff194bd9 BF |
3623 | return sop; |
3624 | } | |
3625 | ||
fe0750e5 | 3626 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 | 3627 | { |
d4f0489f | 3628 | lockdep_assert_held(&clp->cl_lock); |
9b531137 | 3629 | |
d4f0489f TM |
3630 | list_add(&oo->oo_owner.so_strhash, |
3631 | &clp->cl_ownerstr_hashtbl[strhashval]); | |
fe0750e5 | 3632 | list_add(&oo->oo_perclient, &clp->cl_openowners); |
ff194bd9 BF |
3633 | } |
3634 | ||
8f4b54c5 JL |
3635 | static void nfs4_unhash_openowner(struct nfs4_stateowner *so) |
3636 | { | |
d4f0489f | 3637 | unhash_openowner_locked(openowner(so)); |
8f4b54c5 JL |
3638 | } |
3639 | ||
6b180f0b JL |
3640 | static void nfs4_free_openowner(struct nfs4_stateowner *so) |
3641 | { | |
3642 | struct nfs4_openowner *oo = openowner(so); | |
3643 | ||
3644 | kmem_cache_free(openowner_slab, oo); | |
3645 | } | |
3646 | ||
3647 | static const struct nfs4_stateowner_operations openowner_ops = { | |
8f4b54c5 JL |
3648 | .so_unhash = nfs4_unhash_openowner, |
3649 | .so_free = nfs4_free_openowner, | |
6b180f0b JL |
3650 | }; |
3651 | ||
7fc0564e AE |
3652 | static struct nfs4_ol_stateid * |
3653 | nfsd4_find_existing_open(struct nfs4_file *fp, struct nfsd4_open *open) | |
3654 | { | |
3655 | struct nfs4_ol_stateid *local, *ret = NULL; | |
3656 | struct nfs4_openowner *oo = open->op_openowner; | |
3657 | ||
3658 | lockdep_assert_held(&fp->fi_lock); | |
3659 | ||
3660 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { | |
3661 | /* ignore lock owners */ | |
3662 | if (local->st_stateowner->so_is_open_owner == 0) | |
3663 | continue; | |
15ca08d3 TM |
3664 | if (local->st_stateowner != &oo->oo_owner) |
3665 | continue; | |
3666 | if (local->st_stid.sc_type == NFS4_OPEN_STID) { | |
7fc0564e | 3667 | ret = local; |
a15dfcd5 | 3668 | refcount_inc(&ret->st_stid.sc_count); |
7fc0564e AE |
3669 | break; |
3670 | } | |
3671 | } | |
3672 | return ret; | |
3673 | } | |
3674 | ||
15ca08d3 TM |
3675 | static __be32 |
3676 | nfsd4_verify_open_stid(struct nfs4_stid *s) | |
3677 | { | |
3678 | __be32 ret = nfs_ok; | |
3679 | ||
3680 | switch (s->sc_type) { | |
3681 | default: | |
3682 | break; | |
4f176417 | 3683 | case 0: |
15ca08d3 TM |
3684 | case NFS4_CLOSED_STID: |
3685 | case NFS4_CLOSED_DELEG_STID: | |
3686 | ret = nfserr_bad_stateid; | |
3687 | break; | |
3688 | case NFS4_REVOKED_DELEG_STID: | |
3689 | ret = nfserr_deleg_revoked; | |
3690 | } | |
3691 | return ret; | |
3692 | } | |
3693 | ||
3694 | /* Lock the stateid st_mutex, and deal with races with CLOSE */ | |
3695 | static __be32 | |
3696 | nfsd4_lock_ol_stateid(struct nfs4_ol_stateid *stp) | |
3697 | { | |
3698 | __be32 ret; | |
3699 | ||
4f34bd05 | 3700 | mutex_lock_nested(&stp->st_mutex, LOCK_STATEID_MUTEX); |
15ca08d3 TM |
3701 | ret = nfsd4_verify_open_stid(&stp->st_stid); |
3702 | if (ret != nfs_ok) | |
3703 | mutex_unlock(&stp->st_mutex); | |
3704 | return ret; | |
3705 | } | |
3706 | ||
3707 | static struct nfs4_ol_stateid * | |
3708 | nfsd4_find_and_lock_existing_open(struct nfs4_file *fp, struct nfsd4_open *open) | |
3709 | { | |
3710 | struct nfs4_ol_stateid *stp; | |
3711 | for (;;) { | |
3712 | spin_lock(&fp->fi_lock); | |
3713 | stp = nfsd4_find_existing_open(fp, open); | |
3714 | spin_unlock(&fp->fi_lock); | |
3715 | if (!stp || nfsd4_lock_ol_stateid(stp) == nfs_ok) | |
3716 | break; | |
3717 | nfs4_put_stid(&stp->st_stid); | |
3718 | } | |
3719 | return stp; | |
3720 | } | |
3721 | ||
fe0750e5 | 3722 | static struct nfs4_openowner * |
13d6f66b | 3723 | alloc_init_open_stateowner(unsigned int strhashval, struct nfsd4_open *open, |
db24b3b4 JL |
3724 | struct nfsd4_compound_state *cstate) |
3725 | { | |
13d6f66b | 3726 | struct nfs4_client *clp = cstate->clp; |
7ffb5880 | 3727 | struct nfs4_openowner *oo, *ret; |
ff194bd9 | 3728 | |
fe0750e5 BF |
3729 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
3730 | if (!oo) | |
ff194bd9 | 3731 | return NULL; |
6b180f0b | 3732 | oo->oo_owner.so_ops = &openowner_ops; |
fe0750e5 BF |
3733 | oo->oo_owner.so_is_open_owner = 1; |
3734 | oo->oo_owner.so_seqid = open->op_seqid; | |
d3134b10 | 3735 | oo->oo_flags = 0; |
db24b3b4 JL |
3736 | if (nfsd4_has_session(cstate)) |
3737 | oo->oo_flags |= NFS4_OO_CONFIRMED; | |
fe0750e5 | 3738 | oo->oo_time = 0; |
38c387b5 | 3739 | oo->oo_last_closed_stid = NULL; |
fe0750e5 | 3740 | INIT_LIST_HEAD(&oo->oo_close_lru); |
d4f0489f TM |
3741 | spin_lock(&clp->cl_lock); |
3742 | ret = find_openstateowner_str_locked(strhashval, open, clp); | |
7ffb5880 TM |
3743 | if (ret == NULL) { |
3744 | hash_openowner(oo, clp, strhashval); | |
3745 | ret = oo; | |
3746 | } else | |
d50ffded KM |
3747 | nfs4_free_stateowner(&oo->oo_owner); |
3748 | ||
d4f0489f | 3749 | spin_unlock(&clp->cl_lock); |
c5952338 | 3750 | return ret; |
1da177e4 LT |
3751 | } |
3752 | ||
7fc0564e | 3753 | static struct nfs4_ol_stateid * |
8c7245ab | 3754 | init_open_stateid(struct nfs4_file *fp, struct nfsd4_open *open) |
7fc0564e AE |
3755 | { |
3756 | ||
fe0750e5 | 3757 | struct nfs4_openowner *oo = open->op_openowner; |
7fc0564e | 3758 | struct nfs4_ol_stateid *retstp = NULL; |
8c7245ab | 3759 | struct nfs4_ol_stateid *stp; |
1da177e4 | 3760 | |
8c7245ab | 3761 | stp = open->op_stp; |
5cc1fb2a OD |
3762 | /* We are moving these outside of the spinlocks to avoid the warnings */ |
3763 | mutex_init(&stp->st_mutex); | |
4f34bd05 | 3764 | mutex_lock_nested(&stp->st_mutex, OPEN_STATEID_MUTEX); |
5cc1fb2a | 3765 | |
15ca08d3 | 3766 | retry: |
7fc0564e AE |
3767 | spin_lock(&oo->oo_owner.so_client->cl_lock); |
3768 | spin_lock(&fp->fi_lock); | |
3769 | ||
3770 | retstp = nfsd4_find_existing_open(fp, open); | |
3771 | if (retstp) | |
3772 | goto out_unlock; | |
8c7245ab OD |
3773 | |
3774 | open->op_stp = NULL; | |
a15dfcd5 | 3775 | refcount_inc(&stp->st_stid.sc_count); |
3abdb607 | 3776 | stp->st_stid.sc_type = NFS4_OPEN_STID; |
3c87b9b7 | 3777 | INIT_LIST_HEAD(&stp->st_locks); |
b5971afa | 3778 | stp->st_stateowner = nfs4_get_stateowner(&oo->oo_owner); |
13cd2184 | 3779 | get_nfs4_file(fp); |
11b9164a | 3780 | stp->st_stid.sc_file = fp; |
1da177e4 LT |
3781 | stp->st_access_bmap = 0; |
3782 | stp->st_deny_bmap = 0; | |
4c4cd222 | 3783 | stp->st_openstp = NULL; |
1c755dc1 | 3784 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); |
1d31a253 | 3785 | list_add(&stp->st_perfile, &fp->fi_stateids); |
7fc0564e AE |
3786 | |
3787 | out_unlock: | |
1d31a253 | 3788 | spin_unlock(&fp->fi_lock); |
1c755dc1 | 3789 | spin_unlock(&oo->oo_owner.so_client->cl_lock); |
5cc1fb2a | 3790 | if (retstp) { |
15ca08d3 TM |
3791 | /* Handle races with CLOSE */ |
3792 | if (nfsd4_lock_ol_stateid(retstp) != nfs_ok) { | |
3793 | nfs4_put_stid(&retstp->st_stid); | |
3794 | goto retry; | |
3795 | } | |
8c7245ab | 3796 | /* To keep mutex tracking happy */ |
5cc1fb2a | 3797 | mutex_unlock(&stp->st_mutex); |
8c7245ab | 3798 | stp = retstp; |
5cc1fb2a | 3799 | } |
8c7245ab | 3800 | return stp; |
1da177e4 LT |
3801 | } |
3802 | ||
d3134b10 JL |
3803 | /* |
3804 | * In the 4.0 case we need to keep the owners around a little while to handle | |
3805 | * CLOSE replay. We still do need to release any file access that is held by | |
3806 | * them before returning however. | |
3807 | */ | |
fd39ca9a | 3808 | static void |
d3134b10 | 3809 | move_to_close_lru(struct nfs4_ol_stateid *s, struct net *net) |
1da177e4 | 3810 | { |
217526e7 | 3811 | struct nfs4_ol_stateid *last; |
d3134b10 JL |
3812 | struct nfs4_openowner *oo = openowner(s->st_stateowner); |
3813 | struct nfsd_net *nn = net_generic(s->st_stid.sc_client->net, | |
3814 | nfsd_net_id); | |
73758fed | 3815 | |
fe0750e5 | 3816 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 3817 | |
b401be22 JL |
3818 | /* |
3819 | * We know that we hold one reference via nfsd4_close, and another | |
3820 | * "persistent" reference for the client. If the refcount is higher | |
3821 | * than 2, then there are still calls in progress that are using this | |
3822 | * stateid. We can't put the sc_file reference until they are finished. | |
3823 | * Wait for the refcount to drop to 2. Since it has been unhashed, | |
3824 | * there should be no danger of the refcount going back up again at | |
3825 | * this point. | |
3826 | */ | |
a15dfcd5 | 3827 | wait_event(close_wq, refcount_read(&s->st_stid.sc_count) == 2); |
b401be22 | 3828 | |
d3134b10 JL |
3829 | release_all_access(s); |
3830 | if (s->st_stid.sc_file) { | |
3831 | put_nfs4_file(s->st_stid.sc_file); | |
3832 | s->st_stid.sc_file = NULL; | |
3833 | } | |
217526e7 JL |
3834 | |
3835 | spin_lock(&nn->client_lock); | |
3836 | last = oo->oo_last_closed_stid; | |
d3134b10 | 3837 | oo->oo_last_closed_stid = s; |
73758fed | 3838 | list_move_tail(&oo->oo_close_lru, &nn->close_lru); |
fe0750e5 | 3839 | oo->oo_time = get_seconds(); |
217526e7 JL |
3840 | spin_unlock(&nn->client_lock); |
3841 | if (last) | |
3842 | nfs4_put_stid(&last->st_stid); | |
1da177e4 LT |
3843 | } |
3844 | ||
1da177e4 LT |
3845 | /* search file_hashtbl[] for file */ |
3846 | static struct nfs4_file * | |
5b095e99 | 3847 | find_file_locked(struct knfsd_fh *fh, unsigned int hashval) |
1da177e4 | 3848 | { |
1da177e4 LT |
3849 | struct nfs4_file *fp; |
3850 | ||
5b095e99 | 3851 | hlist_for_each_entry_rcu(fp, &file_hashtbl[hashval], fi_hash) { |
4d94c2ef | 3852 | if (fh_match(&fp->fi_fhandle, fh)) { |
818a34eb | 3853 | if (refcount_inc_not_zero(&fp->fi_ref)) |
5b095e99 | 3854 | return fp; |
13cd2184 | 3855 | } |
1da177e4 LT |
3856 | } |
3857 | return NULL; | |
3858 | } | |
3859 | ||
e6ba76e1 | 3860 | struct nfs4_file * |
ca943217 | 3861 | find_file(struct knfsd_fh *fh) |
950e0118 TM |
3862 | { |
3863 | struct nfs4_file *fp; | |
5b095e99 | 3864 | unsigned int hashval = file_hashval(fh); |
950e0118 | 3865 | |
5b095e99 JL |
3866 | rcu_read_lock(); |
3867 | fp = find_file_locked(fh, hashval); | |
3868 | rcu_read_unlock(); | |
950e0118 TM |
3869 | return fp; |
3870 | } | |
3871 | ||
3872 | static struct nfs4_file * | |
f9c00c3a | 3873 | find_or_add_file(struct nfs4_file *new, struct knfsd_fh *fh) |
950e0118 TM |
3874 | { |
3875 | struct nfs4_file *fp; | |
5b095e99 JL |
3876 | unsigned int hashval = file_hashval(fh); |
3877 | ||
3878 | rcu_read_lock(); | |
3879 | fp = find_file_locked(fh, hashval); | |
3880 | rcu_read_unlock(); | |
3881 | if (fp) | |
3882 | return fp; | |
950e0118 TM |
3883 | |
3884 | spin_lock(&state_lock); | |
5b095e99 JL |
3885 | fp = find_file_locked(fh, hashval); |
3886 | if (likely(fp == NULL)) { | |
3887 | nfsd4_init_file(fh, hashval, new); | |
950e0118 TM |
3888 | fp = new; |
3889 | } | |
3890 | spin_unlock(&state_lock); | |
3891 | ||
3892 | return fp; | |
3893 | } | |
3894 | ||
1da177e4 LT |
3895 | /* |
3896 | * Called to check deny when READ with all zero stateid or | |
3897 | * WRITE with all zero or all one stateid | |
3898 | */ | |
b37ad28b | 3899 | static __be32 |
1da177e4 LT |
3900 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
3901 | { | |
1da177e4 | 3902 | struct nfs4_file *fp; |
baeb4ff0 | 3903 | __be32 ret = nfs_ok; |
1da177e4 | 3904 | |
ca943217 | 3905 | fp = find_file(¤t_fh->fh_handle); |
13cd2184 | 3906 | if (!fp) |
baeb4ff0 JL |
3907 | return ret; |
3908 | /* Check for conflicting share reservations */ | |
1d31a253 | 3909 | spin_lock(&fp->fi_lock); |
baeb4ff0 JL |
3910 | if (fp->fi_share_deny & deny_type) |
3911 | ret = nfserr_locked; | |
1d31a253 | 3912 | spin_unlock(&fp->fi_lock); |
13cd2184 N |
3913 | put_nfs4_file(fp); |
3914 | return ret; | |
1da177e4 LT |
3915 | } |
3916 | ||
0162ac2b | 3917 | static void nfsd4_cb_recall_prepare(struct nfsd4_callback *cb) |
1da177e4 | 3918 | { |
0162ac2b | 3919 | struct nfs4_delegation *dp = cb_to_delegation(cb); |
11b9164a TM |
3920 | struct nfsd_net *nn = net_generic(dp->dl_stid.sc_client->net, |
3921 | nfsd_net_id); | |
e8c69d17 | 3922 | |
11b9164a | 3923 | block_delegations(&dp->dl_stid.sc_file->fi_fhandle); |
f54fe962 | 3924 | |
dff1399f | 3925 | /* |
f54fe962 JL |
3926 | * We can't do this in nfsd_break_deleg_cb because it is |
3927 | * already holding inode->i_lock. | |
3928 | * | |
dff1399f JL |
3929 | * If the dl_time != 0, then we know that it has already been |
3930 | * queued for a lease break. Don't queue it again. | |
3931 | */ | |
f54fe962 | 3932 | spin_lock(&state_lock); |
dff1399f | 3933 | if (dp->dl_time == 0) { |
dff1399f | 3934 | dp->dl_time = get_seconds(); |
02e1215f | 3935 | list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru); |
dff1399f | 3936 | } |
02e1215f JL |
3937 | spin_unlock(&state_lock); |
3938 | } | |
1da177e4 | 3939 | |
0162ac2b CH |
3940 | static int nfsd4_cb_recall_done(struct nfsd4_callback *cb, |
3941 | struct rpc_task *task) | |
3942 | { | |
3943 | struct nfs4_delegation *dp = cb_to_delegation(cb); | |
3944 | ||
a457974f AE |
3945 | if (dp->dl_stid.sc_type == NFS4_CLOSED_DELEG_STID) |
3946 | return 1; | |
3947 | ||
0162ac2b CH |
3948 | switch (task->tk_status) { |
3949 | case 0: | |
3950 | return 1; | |
3951 | case -EBADHANDLE: | |
3952 | case -NFS4ERR_BAD_STATEID: | |
3953 | /* | |
3954 | * Race: client probably got cb_recall before open reply | |
3955 | * granting delegation. | |
3956 | */ | |
3957 | if (dp->dl_retries--) { | |
3958 | rpc_delay(task, 2 * HZ); | |
3959 | return 0; | |
3960 | } | |
3961 | /*FALLTHRU*/ | |
3962 | default: | |
3963 | return -1; | |
3964 | } | |
3965 | } | |
3966 | ||
3967 | static void nfsd4_cb_recall_release(struct nfsd4_callback *cb) | |
3968 | { | |
3969 | struct nfs4_delegation *dp = cb_to_delegation(cb); | |
3970 | ||
3971 | nfs4_put_stid(&dp->dl_stid); | |
3972 | } | |
3973 | ||
c4cb8974 | 3974 | static const struct nfsd4_callback_ops nfsd4_cb_recall_ops = { |
0162ac2b CH |
3975 | .prepare = nfsd4_cb_recall_prepare, |
3976 | .done = nfsd4_cb_recall_done, | |
3977 | .release = nfsd4_cb_recall_release, | |
3978 | }; | |
3979 | ||
02e1215f JL |
3980 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
3981 | { | |
3982 | /* | |
3983 | * We're assuming the state code never drops its reference | |
3984 | * without first removing the lease. Since we're in this lease | |
4a269efb BF |
3985 | * callback (and since the lease code is serialized by the |
3986 | * i_lock) we know the server hasn't removed the lease yet, and | |
3987 | * we know it's safe to take a reference. | |
02e1215f | 3988 | */ |
a15dfcd5 | 3989 | refcount_inc(&dp->dl_stid.sc_count); |
f0b5de1b | 3990 | nfsd4_run_cb(&dp->dl_recall); |
6b57d9c8 BF |
3991 | } |
3992 | ||
1c8c601a | 3993 | /* Called from break_lease() with i_lock held. */ |
4d01b7f5 JL |
3994 | static bool |
3995 | nfsd_break_deleg_cb(struct file_lock *fl) | |
6b57d9c8 | 3996 | { |
4d01b7f5 | 3997 | bool ret = false; |
653e514e BF |
3998 | struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; |
3999 | struct nfs4_file *fp = dp->dl_stid.sc_file; | |
6b57d9c8 | 4000 | |
0272e1fd BF |
4001 | /* |
4002 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 4003 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 4004 | * in time: |
0272e1fd BF |
4005 | */ |
4006 | fl->fl_break_time = 0; | |
1da177e4 | 4007 | |
02e1215f | 4008 | spin_lock(&fp->fi_lock); |
417c6629 | 4009 | fp->fi_had_conflict = true; |
353601e7 | 4010 | nfsd_break_one_deleg(dp); |
02e1215f | 4011 | spin_unlock(&fp->fi_lock); |
4d01b7f5 | 4012 | return ret; |
1da177e4 LT |
4013 | } |
4014 | ||
c45198ed | 4015 | static int |
7448cc37 JL |
4016 | nfsd_change_deleg_cb(struct file_lock *onlist, int arg, |
4017 | struct list_head *dispose) | |
1da177e4 LT |
4018 | { |
4019 | if (arg & F_UNLCK) | |
c45198ed | 4020 | return lease_modify(onlist, arg, dispose); |
1da177e4 LT |
4021 | else |
4022 | return -EAGAIN; | |
4023 | } | |
4024 | ||
7b021967 | 4025 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
4026 | .lm_break = nfsd_break_deleg_cb, |
4027 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
4028 | }; |
4029 | ||
7a8711c9 BF |
4030 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
4031 | { | |
4032 | if (nfsd4_has_session(cstate)) | |
4033 | return nfs_ok; | |
4034 | if (seqid == so->so_seqid - 1) | |
4035 | return nfserr_replay_me; | |
4036 | if (seqid == so->so_seqid) | |
4037 | return nfs_ok; | |
4038 | return nfserr_bad_seqid; | |
4039 | } | |
1da177e4 | 4040 | |
4b24ca7d JL |
4041 | static __be32 lookup_clientid(clientid_t *clid, |
4042 | struct nfsd4_compound_state *cstate, | |
4043 | struct nfsd_net *nn) | |
4044 | { | |
4045 | struct nfs4_client *found; | |
4046 | ||
4047 | if (cstate->clp) { | |
4048 | found = cstate->clp; | |
4049 | if (!same_clid(&found->cl_clientid, clid)) | |
4050 | return nfserr_stale_clientid; | |
4051 | return nfs_ok; | |
4052 | } | |
4053 | ||
4054 | if (STALE_CLIENTID(clid, nn)) | |
4055 | return nfserr_stale_clientid; | |
4056 | ||
4057 | /* | |
4058 | * For v4.1+ we get the client in the SEQUENCE op. If we don't have one | |
4059 | * cached already then we know this is for is for v4.0 and "sessions" | |
4060 | * will be false. | |
4061 | */ | |
4062 | WARN_ON_ONCE(cstate->session); | |
3e339f96 | 4063 | spin_lock(&nn->client_lock); |
4b24ca7d | 4064 | found = find_confirmed_client(clid, false, nn); |
3e339f96 TM |
4065 | if (!found) { |
4066 | spin_unlock(&nn->client_lock); | |
4b24ca7d | 4067 | return nfserr_expired; |
3e339f96 TM |
4068 | } |
4069 | atomic_inc(&found->cl_refcount); | |
4070 | spin_unlock(&nn->client_lock); | |
4b24ca7d JL |
4071 | |
4072 | /* Cache the nfs4_client in cstate! */ | |
4073 | cstate->clp = found; | |
4b24ca7d JL |
4074 | return nfs_ok; |
4075 | } | |
4076 | ||
b37ad28b | 4077 | __be32 |
6668958f | 4078 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
3320fef1 | 4079 | struct nfsd4_open *open, struct nfsd_net *nn) |
1da177e4 | 4080 | { |
1da177e4 LT |
4081 | clientid_t *clientid = &open->op_clientid; |
4082 | struct nfs4_client *clp = NULL; | |
4083 | unsigned int strhashval; | |
fe0750e5 | 4084 | struct nfs4_openowner *oo = NULL; |
4cdc951b | 4085 | __be32 status; |
1da177e4 | 4086 | |
2c142baa | 4087 | if (STALE_CLIENTID(&open->op_clientid, nn)) |
1da177e4 | 4088 | return nfserr_stale_clientid; |
32513b40 BF |
4089 | /* |
4090 | * In case we need it later, after we've already created the | |
4091 | * file and don't want to risk a further failure: | |
4092 | */ | |
4093 | open->op_file = nfsd4_alloc_file(); | |
4094 | if (open->op_file == NULL) | |
4095 | return nfserr_jukebox; | |
1da177e4 | 4096 | |
2d91e895 TM |
4097 | status = lookup_clientid(clientid, cstate, nn); |
4098 | if (status) | |
4099 | return status; | |
4100 | clp = cstate->clp; | |
4101 | ||
d4f0489f TM |
4102 | strhashval = ownerstr_hashval(&open->op_owner); |
4103 | oo = find_openstateowner_str(strhashval, open, clp); | |
fe0750e5 BF |
4104 | open->op_openowner = oo; |
4105 | if (!oo) { | |
bcf130f9 | 4106 | goto new_owner; |
1da177e4 | 4107 | } |
dad1c067 | 4108 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
0f442aa2 | 4109 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
4110 | release_openowner(oo); |
4111 | open->op_openowner = NULL; | |
bcf130f9 | 4112 | goto new_owner; |
0f442aa2 | 4113 | } |
4cdc951b BF |
4114 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
4115 | if (status) | |
4116 | return status; | |
4cdc951b | 4117 | goto alloc_stateid; |
bcf130f9 | 4118 | new_owner: |
13d6f66b | 4119 | oo = alloc_init_open_stateowner(strhashval, open, cstate); |
bcf130f9 BF |
4120 | if (oo == NULL) |
4121 | return nfserr_jukebox; | |
4122 | open->op_openowner = oo; | |
4cdc951b | 4123 | alloc_stateid: |
b49e084d | 4124 | open->op_stp = nfs4_alloc_open_stateid(clp); |
4cdc951b BF |
4125 | if (!open->op_stp) |
4126 | return nfserr_jukebox; | |
8287f009 SB |
4127 | |
4128 | if (nfsd4_has_session(cstate) && | |
4129 | (cstate->current_fh.fh_export->ex_flags & NFSEXP_PNFS)) { | |
4130 | open->op_odstate = alloc_clnt_odstate(clp); | |
4131 | if (!open->op_odstate) | |
4132 | return nfserr_jukebox; | |
4133 | } | |
4134 | ||
0f442aa2 | 4135 | return nfs_ok; |
1da177e4 LT |
4136 | } |
4137 | ||
b37ad28b | 4138 | static inline __be32 |
4a6e43e6 N |
4139 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
4140 | { | |
4141 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
4142 | return nfserr_openmode; | |
4143 | else | |
4144 | return nfs_ok; | |
4145 | } | |
4146 | ||
f459e453 | 4147 | static int share_access_to_flags(u32 share_access) |
52f4fb43 | 4148 | { |
f459e453 | 4149 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
52f4fb43 N |
4150 | } |
4151 | ||
38c2f4b1 | 4152 | static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) |
24a0111e | 4153 | { |
f459e453 | 4154 | struct nfs4_stid *ret; |
24a0111e | 4155 | |
95da1b3a AE |
4156 | ret = find_stateid_by_type(cl, s, |
4157 | NFS4_DELEG_STID|NFS4_REVOKED_DELEG_STID); | |
f459e453 BF |
4158 | if (!ret) |
4159 | return NULL; | |
4160 | return delegstateid(ret); | |
24a0111e BF |
4161 | } |
4162 | ||
8b289b2c BF |
4163 | static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) |
4164 | { | |
4165 | return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || | |
4166 | open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; | |
4167 | } | |
4168 | ||
b37ad28b | 4169 | static __be32 |
41d22663 | 4170 | nfs4_check_deleg(struct nfs4_client *cl, struct nfsd4_open *open, |
567d9829 N |
4171 | struct nfs4_delegation **dp) |
4172 | { | |
4173 | int flags; | |
b37ad28b | 4174 | __be32 status = nfserr_bad_stateid; |
dcd94cc2 | 4175 | struct nfs4_delegation *deleg; |
567d9829 | 4176 | |
dcd94cc2 TM |
4177 | deleg = find_deleg_stateid(cl, &open->op_delegate_stateid); |
4178 | if (deleg == NULL) | |
c44c5eeb | 4179 | goto out; |
95da1b3a AE |
4180 | if (deleg->dl_stid.sc_type == NFS4_REVOKED_DELEG_STID) { |
4181 | nfs4_put_stid(&deleg->dl_stid); | |
4182 | if (cl->cl_minorversion) | |
4183 | status = nfserr_deleg_revoked; | |
4184 | goto out; | |
4185 | } | |
24a0111e | 4186 | flags = share_access_to_flags(open->op_share_access); |
dcd94cc2 TM |
4187 | status = nfs4_check_delegmode(deleg, flags); |
4188 | if (status) { | |
4189 | nfs4_put_stid(&deleg->dl_stid); | |
4190 | goto out; | |
4191 | } | |
4192 | *dp = deleg; | |
c44c5eeb | 4193 | out: |
8b289b2c | 4194 | if (!nfsd4_is_deleg_cur(open)) |
c44c5eeb N |
4195 | return nfs_ok; |
4196 | if (status) | |
4197 | return status; | |
dad1c067 | 4198 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
c44c5eeb | 4199 | return nfs_ok; |
567d9829 N |
4200 | } |
4201 | ||
21fb4016 BF |
4202 | static inline int nfs4_access_to_access(u32 nfs4_access) |
4203 | { | |
4204 | int flags = 0; | |
4205 | ||
4206 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
4207 | flags |= NFSD_MAY_READ; | |
4208 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
4209 | flags |= NFSD_MAY_WRITE; | |
4210 | return flags; | |
4211 | } | |
4212 | ||
7e6a72e5 CH |
4213 | static inline __be32 |
4214 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, | |
4215 | struct nfsd4_open *open) | |
4216 | { | |
4217 | struct iattr iattr = { | |
4218 | .ia_valid = ATTR_SIZE, | |
4219 | .ia_size = 0, | |
4220 | }; | |
4221 | if (!open->op_truncate) | |
4222 | return 0; | |
4223 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
4224 | return nfserr_inval; | |
4225 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); | |
4226 | } | |
4227 | ||
0c12eaff | 4228 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
6eb3a1d0 JL |
4229 | struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp, |
4230 | struct nfsd4_open *open) | |
f9d7562f | 4231 | { |
de18643d | 4232 | struct file *filp = NULL; |
f9d7562f | 4233 | __be32 status; |
0c12eaff CB |
4234 | int oflag = nfs4_access_to_omode(open->op_share_access); |
4235 | int access = nfs4_access_to_access(open->op_share_access); | |
baeb4ff0 | 4236 | unsigned char old_access_bmap, old_deny_bmap; |
0c12eaff | 4237 | |
de18643d | 4238 | spin_lock(&fp->fi_lock); |
baeb4ff0 JL |
4239 | |
4240 | /* | |
4241 | * Are we trying to set a deny mode that would conflict with | |
4242 | * current access? | |
4243 | */ | |
4244 | status = nfs4_file_check_deny(fp, open->op_share_deny); | |
4245 | if (status != nfs_ok) { | |
4246 | spin_unlock(&fp->fi_lock); | |
4247 | goto out; | |
4248 | } | |
4249 | ||
4250 | /* set access to the file */ | |
4251 | status = nfs4_file_get_access(fp, open->op_share_access); | |
4252 | if (status != nfs_ok) { | |
4253 | spin_unlock(&fp->fi_lock); | |
4254 | goto out; | |
4255 | } | |
4256 | ||
4257 | /* Set access bits in stateid */ | |
4258 | old_access_bmap = stp->st_access_bmap; | |
4259 | set_access(open->op_share_access, stp); | |
4260 | ||
4261 | /* Set new deny mask */ | |
4262 | old_deny_bmap = stp->st_deny_bmap; | |
4263 | set_deny(open->op_share_deny, stp); | |
4264 | fp->fi_share_deny |= (open->op_share_deny & NFS4_SHARE_DENY_BOTH); | |
4265 | ||
f9d7562f | 4266 | if (!fp->fi_fds[oflag]) { |
de18643d TM |
4267 | spin_unlock(&fp->fi_lock); |
4268 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, &filp); | |
f9d7562f | 4269 | if (status) |
baeb4ff0 | 4270 | goto out_put_access; |
de18643d TM |
4271 | spin_lock(&fp->fi_lock); |
4272 | if (!fp->fi_fds[oflag]) { | |
4273 | fp->fi_fds[oflag] = filp; | |
4274 | filp = NULL; | |
4275 | } | |
f9d7562f | 4276 | } |
de18643d TM |
4277 | spin_unlock(&fp->fi_lock); |
4278 | if (filp) | |
4279 | fput(filp); | |
f9d7562f | 4280 | |
7e6a72e5 CH |
4281 | status = nfsd4_truncate(rqstp, cur_fh, open); |
4282 | if (status) | |
4283 | goto out_put_access; | |
7e6a72e5 CH |
4284 | out: |
4285 | return status; | |
baeb4ff0 JL |
4286 | out_put_access: |
4287 | stp->st_access_bmap = old_access_bmap; | |
4288 | nfs4_file_put_access(fp, open->op_share_access); | |
4289 | reset_union_bmap_deny(bmap_to_share_mode(old_deny_bmap), stp); | |
4290 | goto out; | |
1da177e4 LT |
4291 | } |
4292 | ||
b37ad28b | 4293 | static __be32 |
dcef0413 | 4294 | 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 | 4295 | { |
b37ad28b | 4296 | __be32 status; |
6ac75368 | 4297 | unsigned char old_deny_bmap = stp->st_deny_bmap; |
1da177e4 | 4298 | |
6eb3a1d0 | 4299 | if (!test_access(open->op_share_access, stp)) |
baeb4ff0 | 4300 | return nfs4_get_vfs_file(rqstp, fp, cur_fh, stp, open); |
7e6a72e5 | 4301 | |
baeb4ff0 JL |
4302 | /* test and set deny mode */ |
4303 | spin_lock(&fp->fi_lock); | |
4304 | status = nfs4_file_check_deny(fp, open->op_share_deny); | |
4305 | if (status == nfs_ok) { | |
baeb4ff0 JL |
4306 | set_deny(open->op_share_deny, stp); |
4307 | fp->fi_share_deny |= | |
4308 | (open->op_share_deny & NFS4_SHARE_DENY_BOTH); | |
4309 | } | |
4310 | spin_unlock(&fp->fi_lock); | |
4311 | ||
4312 | if (status != nfs_ok) | |
1da177e4 | 4313 | return status; |
1da177e4 | 4314 | |
baeb4ff0 JL |
4315 | status = nfsd4_truncate(rqstp, cur_fh, open); |
4316 | if (status != nfs_ok) | |
4317 | reset_union_bmap_deny(old_deny_bmap, stp); | |
4318 | return status; | |
4319 | } | |
1da177e4 | 4320 | |
14a24e99 BF |
4321 | /* Should we give out recallable state?: */ |
4322 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
4323 | { | |
4324 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
4325 | return true; | |
4326 | /* | |
4327 | * In the sessions case, since we don't have to establish a | |
4328 | * separate connection for callbacks, we assume it's OK | |
4329 | * until we hear otherwise: | |
4330 | */ | |
4331 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
4332 | } | |
4333 | ||
653e514e BF |
4334 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, |
4335 | int flag) | |
22d38c4c BF |
4336 | { |
4337 | struct file_lock *fl; | |
4338 | ||
4339 | fl = locks_alloc_lock(); | |
4340 | if (!fl) | |
4341 | return NULL; | |
22d38c4c | 4342 | fl->fl_lmops = &nfsd_lease_mng_ops; |
617588d5 | 4343 | fl->fl_flags = FL_DELEG; |
22d38c4c BF |
4344 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; |
4345 | fl->fl_end = OFFSET_MAX; | |
653e514e | 4346 | fl->fl_owner = (fl_owner_t)dp; |
22d38c4c | 4347 | fl->fl_pid = current->tgid; |
353601e7 | 4348 | fl->fl_file = dp->dl_stid.sc_file->fi_deleg_file; |
22d38c4c BF |
4349 | return fl; |
4350 | } | |
4351 | ||
0b26693c JL |
4352 | static struct nfs4_delegation * |
4353 | nfs4_set_delegation(struct nfs4_client *clp, struct svc_fh *fh, | |
8287f009 | 4354 | struct nfs4_file *fp, struct nfs4_clnt_odstate *odstate) |
acfdf5c3 | 4355 | { |
68b18f52 | 4356 | int status = 0; |
0b26693c | 4357 | struct nfs4_delegation *dp; |
353601e7 BF |
4358 | struct file *filp; |
4359 | struct file_lock *fl; | |
417c6629 | 4360 | |
353601e7 BF |
4361 | /* |
4362 | * The fi_had_conflict and nfs_get_existing_delegation checks | |
4363 | * here are just optimizations; we'll need to recheck them at | |
4364 | * the end: | |
4365 | */ | |
bf7bd3e9 | 4366 | if (fp->fi_had_conflict) |
0b26693c JL |
4367 | return ERR_PTR(-EAGAIN); |
4368 | ||
353601e7 BF |
4369 | filp = find_readable_file(fp); |
4370 | if (!filp) { | |
4371 | /* We should always have a readable file here */ | |
4372 | WARN_ON_ONCE(1); | |
4373 | return ERR_PTR(-EBADF); | |
4374 | } | |
34ed9872 AE |
4375 | spin_lock(&state_lock); |
4376 | spin_lock(&fp->fi_lock); | |
68b18f52 BF |
4377 | if (nfs4_delegation_exists(clp, fp)) |
4378 | status = -EAGAIN; | |
353601e7 BF |
4379 | else if (!fp->fi_deleg_file) { |
4380 | fp->fi_deleg_file = filp; | |
4381 | /* increment early to prevent fi_deleg_file from being | |
4382 | * cleared */ | |
4383 | fp->fi_delegees = 1; | |
4384 | filp = NULL; | |
4385 | } else | |
4386 | fp->fi_delegees++; | |
34ed9872 AE |
4387 | spin_unlock(&fp->fi_lock); |
4388 | spin_unlock(&state_lock); | |
353601e7 BF |
4389 | if (filp) |
4390 | fput(filp); | |
34ed9872 AE |
4391 | if (status) |
4392 | return ERR_PTR(status); | |
4393 | ||
353601e7 | 4394 | status = -ENOMEM; |
86d29b10 | 4395 | dp = alloc_init_deleg(clp, fp, fh, odstate); |
0b26693c | 4396 | if (!dp) |
353601e7 BF |
4397 | goto out_delegees; |
4398 | ||
4399 | fl = nfs4_alloc_init_lease(dp, NFS4_OPEN_DELEGATE_READ); | |
4400 | if (!fl) | |
bd8d7250 | 4401 | goto out_clnt_odstate; |
353601e7 BF |
4402 | |
4403 | status = vfs_setlease(fp->fi_deleg_file, fl->fl_type, &fl, NULL); | |
4404 | if (fl) | |
4405 | locks_free_lock(fl); | |
4406 | if (status) | |
4407 | goto out_clnt_odstate; | |
0b26693c | 4408 | |
417c6629 JL |
4409 | spin_lock(&state_lock); |
4410 | spin_lock(&fp->fi_lock); | |
353601e7 | 4411 | if (fp->fi_had_conflict) |
417c6629 | 4412 | status = -EAGAIN; |
353601e7 BF |
4413 | else |
4414 | status = hash_delegation_locked(dp, fp); | |
417c6629 | 4415 | spin_unlock(&fp->fi_lock); |
cdc97505 | 4416 | spin_unlock(&state_lock); |
353601e7 BF |
4417 | |
4418 | if (status) | |
692ad280 AE |
4419 | goto out_unlock; |
4420 | ||
0b26693c | 4421 | return dp; |
692ad280 AE |
4422 | out_unlock: |
4423 | vfs_setlease(fp->fi_deleg_file, F_UNLCK, NULL, (void **)&dp); | |
353601e7 BF |
4424 | out_clnt_odstate: |
4425 | put_clnt_odstate(dp->dl_clnt_odstate); | |
353601e7 BF |
4426 | nfs4_put_stid(&dp->dl_stid); |
4427 | out_delegees: | |
4428 | put_deleg_file(fp); | |
4429 | return ERR_PTR(status); | |
edab9782 BF |
4430 | } |
4431 | ||
4aa8913c BH |
4432 | static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) |
4433 | { | |
4434 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
4435 | if (status == -EAGAIN) | |
4436 | open->op_why_no_deleg = WND4_CONTENTION; | |
4437 | else { | |
4438 | open->op_why_no_deleg = WND4_RESOURCE; | |
4439 | switch (open->op_deleg_want) { | |
4440 | case NFS4_SHARE_WANT_READ_DELEG: | |
4441 | case NFS4_SHARE_WANT_WRITE_DELEG: | |
4442 | case NFS4_SHARE_WANT_ANY_DELEG: | |
4443 | break; | |
4444 | case NFS4_SHARE_WANT_CANCEL: | |
4445 | open->op_why_no_deleg = WND4_CANCELLED; | |
4446 | break; | |
4447 | case NFS4_SHARE_WANT_NO_DELEG: | |
063b0fb9 | 4448 | WARN_ON_ONCE(1); |
4aa8913c BH |
4449 | } |
4450 | } | |
4451 | } | |
4452 | ||
1da177e4 LT |
4453 | /* |
4454 | * Attempt to hand out a delegation. | |
99c41515 BF |
4455 | * |
4456 | * Note we don't support write delegations, and won't until the vfs has | |
4457 | * proper support for them. | |
1da177e4 LT |
4458 | */ |
4459 | static void | |
4cf59221 JL |
4460 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, |
4461 | struct nfs4_ol_stateid *stp) | |
1da177e4 LT |
4462 | { |
4463 | struct nfs4_delegation *dp; | |
4cf59221 JL |
4464 | struct nfs4_openowner *oo = openowner(stp->st_stateowner); |
4465 | struct nfs4_client *clp = stp->st_stid.sc_client; | |
14a24e99 | 4466 | int cb_up; |
99c41515 | 4467 | int status = 0; |
1da177e4 | 4468 | |
fe0750e5 | 4469 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
7b190fec N |
4470 | open->op_recall = 0; |
4471 | switch (open->op_claim_type) { | |
4472 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 4473 | if (!cb_up) |
7b190fec | 4474 | open->op_recall = 1; |
99c41515 BF |
4475 | if (open->op_delegate_type != NFS4_OPEN_DELEGATE_READ) |
4476 | goto out_no_deleg; | |
7b190fec N |
4477 | break; |
4478 | case NFS4_OPEN_CLAIM_NULL: | |
ed47b062 | 4479 | case NFS4_OPEN_CLAIM_FH: |
99c41515 BF |
4480 | /* |
4481 | * Let's not give out any delegations till everyone's | |
c87fb4a3 BF |
4482 | * had the chance to reclaim theirs, *and* until |
4483 | * NLM locks have all been reclaimed: | |
99c41515 | 4484 | */ |
4cf59221 | 4485 | if (locks_in_grace(clp->net)) |
99c41515 | 4486 | goto out_no_deleg; |
dad1c067 | 4487 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
99c41515 | 4488 | goto out_no_deleg; |
9a0590ae SD |
4489 | /* |
4490 | * Also, if the file was opened for write or | |
4491 | * create, there's a good chance the client's | |
4492 | * about to write to it, resulting in an | |
4493 | * immediate recall (since we don't support | |
4494 | * write delegations): | |
4495 | */ | |
7b190fec | 4496 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
99c41515 BF |
4497 | goto out_no_deleg; |
4498 | if (open->op_create == NFS4_OPEN_CREATE) | |
4499 | goto out_no_deleg; | |
7b190fec N |
4500 | break; |
4501 | default: | |
99c41515 | 4502 | goto out_no_deleg; |
7b190fec | 4503 | } |
8287f009 | 4504 | dp = nfs4_set_delegation(clp, fh, stp->st_stid.sc_file, stp->st_clnt_odstate); |
0b26693c | 4505 | if (IS_ERR(dp)) |
dd239cc0 | 4506 | goto out_no_deleg; |
1da177e4 | 4507 | |
d5477a8d | 4508 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 4509 | |
8c10cbdb | 4510 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
d5477a8d | 4511 | STATEID_VAL(&dp->dl_stid.sc_stateid)); |
99c41515 | 4512 | open->op_delegate_type = NFS4_OPEN_DELEGATE_READ; |
67cb1279 | 4513 | nfs4_put_stid(&dp->dl_stid); |
dd239cc0 | 4514 | return; |
dd239cc0 | 4515 | out_no_deleg: |
99c41515 BF |
4516 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE; |
4517 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && | |
d08d32e6 | 4518 | open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) { |
99c41515 | 4519 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
d08d32e6 BF |
4520 | open->op_recall = 1; |
4521 | } | |
99c41515 BF |
4522 | |
4523 | /* 4.1 client asking for a delegation? */ | |
4524 | if (open->op_deleg_want) | |
4525 | nfsd4_open_deleg_none_ext(open, status); | |
4526 | return; | |
1da177e4 LT |
4527 | } |
4528 | ||
e27f49c3 BH |
4529 | static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, |
4530 | struct nfs4_delegation *dp) | |
4531 | { | |
4532 | if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && | |
4533 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
4534 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
4535 | open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; | |
4536 | } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && | |
4537 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
4538 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
4539 | open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; | |
4540 | } | |
4541 | /* Otherwise the client must be confused wanting a delegation | |
4542 | * it already has, therefore we don't return | |
4543 | * NFS4_OPEN_DELEGATE_NONE_EXT and reason. | |
4544 | */ | |
4545 | } | |
4546 | ||
b37ad28b | 4547 | __be32 |
1da177e4 LT |
4548 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
4549 | { | |
6668958f | 4550 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
38c2f4b1 | 4551 | struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; |
1da177e4 | 4552 | struct nfs4_file *fp = NULL; |
dcef0413 | 4553 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 4554 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 4555 | __be32 status; |
d8a1a000 | 4556 | bool new_stp = false; |
1da177e4 | 4557 | |
1da177e4 LT |
4558 | /* |
4559 | * Lookup file; if found, lookup stateid and check open request, | |
4560 | * and check for delegations in the process of being recalled. | |
4561 | * If not found, create the nfs4_file struct | |
4562 | */ | |
f9c00c3a | 4563 | fp = find_or_add_file(open->op_file, ¤t_fh->fh_handle); |
950e0118 | 4564 | if (fp != open->op_file) { |
41d22663 | 4565 | status = nfs4_check_deleg(cl, open, &dp); |
c44c5eeb N |
4566 | if (status) |
4567 | goto out; | |
15ca08d3 | 4568 | stp = nfsd4_find_and_lock_existing_open(fp, open); |
1da177e4 | 4569 | } else { |
950e0118 | 4570 | open->op_file = NULL; |
c44c5eeb | 4571 | status = nfserr_bad_stateid; |
8b289b2c | 4572 | if (nfsd4_is_deleg_cur(open)) |
c44c5eeb | 4573 | goto out; |
1da177e4 LT |
4574 | } |
4575 | ||
d8a1a000 TM |
4576 | if (!stp) { |
4577 | stp = init_open_stateid(fp, open); | |
4578 | if (!open->op_stp) | |
4579 | new_stp = true; | |
4580 | } | |
4581 | ||
1da177e4 LT |
4582 | /* |
4583 | * OPEN the file, or upgrade an existing OPEN. | |
4584 | * If truncate fails, the OPEN fails. | |
d8a1a000 TM |
4585 | * |
4586 | * stp is already locked. | |
1da177e4 | 4587 | */ |
d8a1a000 | 4588 | if (!new_stp) { |
1da177e4 | 4589 | /* Stateid was found, this is an OPEN upgrade */ |
f9d7562f | 4590 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
35a92fe8 | 4591 | if (status) { |
feb9dad5 | 4592 | mutex_unlock(&stp->st_mutex); |
1da177e4 | 4593 | goto out; |
35a92fe8 | 4594 | } |
1da177e4 | 4595 | } else { |
6eb3a1d0 JL |
4596 | status = nfs4_get_vfs_file(rqstp, fp, current_fh, stp, open); |
4597 | if (status) { | |
d8a1a000 | 4598 | stp->st_stid.sc_type = NFS4_CLOSED_STID; |
6eb3a1d0 | 4599 | release_open_stateid(stp); |
d8a1a000 | 4600 | mutex_unlock(&stp->st_mutex); |
6eb3a1d0 JL |
4601 | goto out; |
4602 | } | |
8287f009 SB |
4603 | |
4604 | stp->st_clnt_odstate = find_or_hash_clnt_odstate(fp, | |
4605 | open->op_odstate); | |
4606 | if (stp->st_clnt_odstate == open->op_odstate) | |
4607 | open->op_odstate = NULL; | |
1da177e4 | 4608 | } |
d8a1a000 | 4609 | |
9767feb2 | 4610 | nfs4_inc_and_copy_stateid(&open->op_stateid, &stp->st_stid); |
feb9dad5 | 4611 | mutex_unlock(&stp->st_mutex); |
1da177e4 | 4612 | |
d24433cd | 4613 | if (nfsd4_has_session(&resp->cstate)) { |
d24433cd BH |
4614 | if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { |
4615 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
4616 | open->op_why_no_deleg = WND4_NOT_WANTED; | |
4617 | goto nodeleg; | |
4618 | } | |
4619 | } | |
4620 | ||
1da177e4 LT |
4621 | /* |
4622 | * Attempt to hand out a delegation. No error return, because the | |
4623 | * OPEN succeeds even if we fail. | |
4624 | */ | |
4cf59221 | 4625 | nfs4_open_delegation(current_fh, open, stp); |
d24433cd | 4626 | nodeleg: |
1da177e4 LT |
4627 | status = nfs_ok; |
4628 | ||
8c10cbdb | 4629 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
dcef0413 | 4630 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
1da177e4 | 4631 | out: |
d24433cd BH |
4632 | /* 4.1 client trying to upgrade/downgrade delegation? */ |
4633 | if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && | |
e27f49c3 BH |
4634 | open->op_deleg_want) |
4635 | nfsd4_deleg_xgrade_none_ext(open, dp); | |
d24433cd | 4636 | |
13cd2184 N |
4637 | if (fp) |
4638 | put_nfs4_file(fp); | |
37515177 | 4639 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
87186022 | 4640 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
1da177e4 LT |
4641 | /* |
4642 | * To finish the open response, we just need to set the rflags. | |
4643 | */ | |
4644 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
19e4c347 JL |
4645 | if (nfsd4_has_session(&resp->cstate)) |
4646 | open->op_rflags |= NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK; | |
4647 | else if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED)) | |
1da177e4 | 4648 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
19e4c347 | 4649 | |
dcd94cc2 TM |
4650 | if (dp) |
4651 | nfs4_put_stid(&dp->dl_stid); | |
d6f2bc5d TM |
4652 | if (stp) |
4653 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 LT |
4654 | |
4655 | return status; | |
4656 | } | |
4657 | ||
58fb12e6 | 4658 | void nfsd4_cleanup_open_state(struct nfsd4_compound_state *cstate, |
42297899 | 4659 | struct nfsd4_open *open) |
d29b20cd BF |
4660 | { |
4661 | if (open->op_openowner) { | |
d3134b10 JL |
4662 | struct nfs4_stateowner *so = &open->op_openowner->oo_owner; |
4663 | ||
4664 | nfsd4_cstate_assign_replay(cstate, so); | |
4665 | nfs4_put_stateowner(so); | |
d29b20cd | 4666 | } |
32513b40 | 4667 | if (open->op_file) |
5b095e99 | 4668 | kmem_cache_free(file_slab, open->op_file); |
4cdc951b | 4669 | if (open->op_stp) |
6011695d | 4670 | nfs4_put_stid(&open->op_stp->st_stid); |
8287f009 SB |
4671 | if (open->op_odstate) |
4672 | kmem_cache_free(odstate_slab, open->op_odstate); | |
d29b20cd BF |
4673 | } |
4674 | ||
b37ad28b | 4675 | __be32 |
b591480b | 4676 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 4677 | union nfsd4_op_u *u) |
1da177e4 | 4678 | { |
eb69853d | 4679 | clientid_t *clid = &u->renew; |
1da177e4 | 4680 | struct nfs4_client *clp; |
b37ad28b | 4681 | __be32 status; |
7f2210fa | 4682 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4683 | |
1da177e4 LT |
4684 | dprintk("process_renew(%08x/%08x): starting\n", |
4685 | clid->cl_boot, clid->cl_id); | |
4b24ca7d | 4686 | status = lookup_clientid(clid, cstate, nn); |
9b2ef62b | 4687 | if (status) |
1da177e4 | 4688 | goto out; |
4b24ca7d | 4689 | clp = cstate->clp; |
1da177e4 | 4690 | status = nfserr_cb_path_down; |
ea1da636 | 4691 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 4692 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
4693 | goto out; |
4694 | status = nfs_ok; | |
4695 | out: | |
1da177e4 LT |
4696 | return status; |
4697 | } | |
4698 | ||
7f5ef2e9 | 4699 | void |
12760c66 | 4700 | nfsd4_end_grace(struct nfsd_net *nn) |
a76b4319 | 4701 | { |
33dcc481 | 4702 | /* do nothing if grace period already ended */ |
a51c84ed | 4703 | if (nn->grace_ended) |
33dcc481 JL |
4704 | return; |
4705 | ||
a76b4319 | 4706 | dprintk("NFSD: end of grace period\n"); |
a51c84ed | 4707 | nn->grace_ended = true; |
70b28235 BF |
4708 | /* |
4709 | * If the server goes down again right now, an NFSv4 | |
4710 | * client will still be allowed to reclaim after it comes back up, | |
4711 | * even if it hasn't yet had a chance to reclaim state this time. | |
4712 | * | |
4713 | */ | |
919b8049 | 4714 | nfsd4_record_grace_done(nn); |
70b28235 BF |
4715 | /* |
4716 | * At this point, NFSv4 clients can still reclaim. But if the | |
4717 | * server crashes, any that have not yet reclaimed will be out | |
4718 | * of luck on the next boot. | |
4719 | * | |
4720 | * (NFSv4.1+ clients are considered to have reclaimed once they | |
4721 | * call RECLAIM_COMPLETE. NFSv4.0 clients are considered to | |
4722 | * have reclaimed after their first OPEN.) | |
4723 | */ | |
5e1533c7 | 4724 | locks_end_grace(&nn->nfsd4_manager); |
70b28235 BF |
4725 | /* |
4726 | * At this point, and once lockd and/or any other containers | |
4727 | * exit their grace period, further reclaims will fail and | |
4728 | * regular locking can resume. | |
4729 | */ | |
a76b4319 N |
4730 | } |
4731 | ||
03f318ca BF |
4732 | /* |
4733 | * If we've waited a lease period but there are still clients trying to | |
4734 | * reclaim, wait a little longer to give them a chance to finish. | |
4735 | */ | |
4736 | static bool clients_still_reclaiming(struct nfsd_net *nn) | |
4737 | { | |
4738 | unsigned long now = get_seconds(); | |
4739 | unsigned long double_grace_period_end = nn->boot_time + | |
4740 | 2 * nn->nfsd4_lease; | |
4741 | ||
4742 | if (!nn->somebody_reclaimed) | |
4743 | return false; | |
4744 | nn->somebody_reclaimed = false; | |
4745 | /* | |
4746 | * If we've given them *two* lease times to reclaim, and they're | |
4747 | * still not done, give up: | |
4748 | */ | |
4749 | if (time_after(now, double_grace_period_end)) | |
4750 | return false; | |
4751 | return true; | |
4752 | } | |
4753 | ||
fd39ca9a | 4754 | static time_t |
09121281 | 4755 | nfs4_laundromat(struct nfsd_net *nn) |
1da177e4 LT |
4756 | { |
4757 | struct nfs4_client *clp; | |
fe0750e5 | 4758 | struct nfs4_openowner *oo; |
1da177e4 | 4759 | struct nfs4_delegation *dp; |
217526e7 | 4760 | struct nfs4_ol_stateid *stp; |
7919d0a2 | 4761 | struct nfsd4_blocked_lock *nbl; |
1da177e4 | 4762 | struct list_head *pos, *next, reaplist; |
3d733711 | 4763 | time_t cutoff = get_seconds() - nn->nfsd4_lease; |
a832e7ae | 4764 | time_t t, new_timeo = nn->nfsd4_lease; |
1da177e4 | 4765 | |
1da177e4 | 4766 | dprintk("NFSD: laundromat service - starting\n"); |
03f318ca BF |
4767 | |
4768 | if (clients_still_reclaiming(nn)) { | |
4769 | new_timeo = 0; | |
4770 | goto out; | |
4771 | } | |
12760c66 | 4772 | nfsd4_end_grace(nn); |
36acb66b | 4773 | INIT_LIST_HEAD(&reaplist); |
c9a49628 | 4774 | spin_lock(&nn->client_lock); |
5ed58bb2 | 4775 | list_for_each_safe(pos, next, &nn->client_lru) { |
1da177e4 LT |
4776 | clp = list_entry(pos, struct nfs4_client, cl_lru); |
4777 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
4778 | t = clp->cl_time - cutoff; | |
a832e7ae | 4779 | new_timeo = min(new_timeo, t); |
1da177e4 LT |
4780 | break; |
4781 | } | |
221a6876 | 4782 | if (mark_client_expired_locked(clp)) { |
d7682988 BH |
4783 | dprintk("NFSD: client in use (clientid %08x)\n", |
4784 | clp->cl_clientid.cl_id); | |
4785 | continue; | |
4786 | } | |
4864af97 | 4787 | list_add(&clp->cl_lru, &reaplist); |
36acb66b | 4788 | } |
c9a49628 | 4789 | spin_unlock(&nn->client_lock); |
36acb66b BH |
4790 | list_for_each_safe(pos, next, &reaplist) { |
4791 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
4792 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
4793 | clp->cl_clientid.cl_id); | |
4864af97 | 4794 | list_del_init(&clp->cl_lru); |
1da177e4 LT |
4795 | expire_client(clp); |
4796 | } | |
cdc97505 | 4797 | spin_lock(&state_lock); |
e8c69d17 | 4798 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 LT |
4799 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
4800 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
a832e7ae JL |
4801 | t = dp->dl_time - cutoff; |
4802 | new_timeo = min(new_timeo, t); | |
1da177e4 LT |
4803 | break; |
4804 | } | |
3fcbbd24 | 4805 | WARN_ON(!unhash_delegation_locked(dp)); |
42690676 | 4806 | list_add(&dp->dl_recall_lru, &reaplist); |
1da177e4 | 4807 | } |
cdc97505 | 4808 | spin_unlock(&state_lock); |
2d4a532d JL |
4809 | while (!list_empty(&reaplist)) { |
4810 | dp = list_first_entry(&reaplist, struct nfs4_delegation, | |
4811 | dl_recall_lru); | |
4812 | list_del_init(&dp->dl_recall_lru); | |
3bd64a5b | 4813 | revoke_delegation(dp); |
1da177e4 | 4814 | } |
217526e7 JL |
4815 | |
4816 | spin_lock(&nn->client_lock); | |
4817 | while (!list_empty(&nn->close_lru)) { | |
4818 | oo = list_first_entry(&nn->close_lru, struct nfs4_openowner, | |
4819 | oo_close_lru); | |
4820 | if (time_after((unsigned long)oo->oo_time, | |
4821 | (unsigned long)cutoff)) { | |
a832e7ae JL |
4822 | t = oo->oo_time - cutoff; |
4823 | new_timeo = min(new_timeo, t); | |
1da177e4 LT |
4824 | break; |
4825 | } | |
217526e7 JL |
4826 | list_del_init(&oo->oo_close_lru); |
4827 | stp = oo->oo_last_closed_stid; | |
4828 | oo->oo_last_closed_stid = NULL; | |
4829 | spin_unlock(&nn->client_lock); | |
4830 | nfs4_put_stid(&stp->st_stid); | |
4831 | spin_lock(&nn->client_lock); | |
1da177e4 | 4832 | } |
217526e7 JL |
4833 | spin_unlock(&nn->client_lock); |
4834 | ||
7919d0a2 JL |
4835 | /* |
4836 | * It's possible for a client to try and acquire an already held lock | |
4837 | * that is being held for a long time, and then lose interest in it. | |
4838 | * So, we clean out any un-revisited request after a lease period | |
4839 | * under the assumption that the client is no longer interested. | |
4840 | * | |
4841 | * RFC5661, sec. 9.6 states that the client must not rely on getting | |
4842 | * notifications and must continue to poll for locks, even when the | |
4843 | * server supports them. Thus this shouldn't lead to clients blocking | |
4844 | * indefinitely once the lock does become free. | |
4845 | */ | |
4846 | BUG_ON(!list_empty(&reaplist)); | |
0cc11a61 | 4847 | spin_lock(&nn->blocked_locks_lock); |
7919d0a2 JL |
4848 | while (!list_empty(&nn->blocked_locks_lru)) { |
4849 | nbl = list_first_entry(&nn->blocked_locks_lru, | |
4850 | struct nfsd4_blocked_lock, nbl_lru); | |
4851 | if (time_after((unsigned long)nbl->nbl_time, | |
4852 | (unsigned long)cutoff)) { | |
4853 | t = nbl->nbl_time - cutoff; | |
4854 | new_timeo = min(new_timeo, t); | |
4855 | break; | |
4856 | } | |
4857 | list_move(&nbl->nbl_lru, &reaplist); | |
4858 | list_del_init(&nbl->nbl_list); | |
4859 | } | |
0cc11a61 | 4860 | spin_unlock(&nn->blocked_locks_lock); |
7919d0a2 JL |
4861 | |
4862 | while (!list_empty(&reaplist)) { | |
64ebe124 | 4863 | nbl = list_first_entry(&reaplist, |
7919d0a2 JL |
4864 | struct nfsd4_blocked_lock, nbl_lru); |
4865 | list_del_init(&nbl->nbl_lru); | |
7919d0a2 JL |
4866 | free_blocked_lock(nbl); |
4867 | } | |
03f318ca | 4868 | out: |
a832e7ae | 4869 | new_timeo = max_t(time_t, new_timeo, NFSD_LAUNDROMAT_MINTIMEOUT); |
a832e7ae | 4870 | return new_timeo; |
1da177e4 LT |
4871 | } |
4872 | ||
a254b246 HH |
4873 | static struct workqueue_struct *laundry_wq; |
4874 | static void laundromat_main(struct work_struct *); | |
a254b246 HH |
4875 | |
4876 | static void | |
09121281 | 4877 | laundromat_main(struct work_struct *laundry) |
1da177e4 LT |
4878 | { |
4879 | time_t t; | |
2e55f3ab | 4880 | struct delayed_work *dwork = to_delayed_work(laundry); |
09121281 SK |
4881 | struct nfsd_net *nn = container_of(dwork, struct nfsd_net, |
4882 | laundromat_work); | |
1da177e4 | 4883 | |
09121281 | 4884 | t = nfs4_laundromat(nn); |
1da177e4 | 4885 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); |
09121281 | 4886 | queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ); |
1da177e4 LT |
4887 | } |
4888 | ||
8fcd461d | 4889 | static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stid *stp) |
1da177e4 | 4890 | { |
8fcd461d | 4891 | if (!fh_match(&fhp->fh_handle, &stp->sc_file->fi_fhandle)) |
f7a4d872 BF |
4892 | return nfserr_bad_stateid; |
4893 | return nfs_ok; | |
1da177e4 LT |
4894 | } |
4895 | ||
1da177e4 | 4896 | static inline int |
82c5ff1b | 4897 | access_permit_read(struct nfs4_ol_stateid *stp) |
1da177e4 | 4898 | { |
82c5ff1b JL |
4899 | return test_access(NFS4_SHARE_ACCESS_READ, stp) || |
4900 | test_access(NFS4_SHARE_ACCESS_BOTH, stp) || | |
4901 | test_access(NFS4_SHARE_ACCESS_WRITE, stp); | |
1da177e4 LT |
4902 | } |
4903 | ||
4904 | static inline int | |
82c5ff1b | 4905 | access_permit_write(struct nfs4_ol_stateid *stp) |
1da177e4 | 4906 | { |
82c5ff1b JL |
4907 | return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || |
4908 | test_access(NFS4_SHARE_ACCESS_BOTH, stp); | |
1da177e4 LT |
4909 | } |
4910 | ||
4911 | static | |
dcef0413 | 4912 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
1da177e4 | 4913 | { |
b37ad28b | 4914 | __be32 status = nfserr_openmode; |
1da177e4 | 4915 | |
02921914 BF |
4916 | /* For lock stateid's, we test the parent open, not the lock: */ |
4917 | if (stp->st_openstp) | |
4918 | stp = stp->st_openstp; | |
82c5ff1b | 4919 | if ((flags & WR_STATE) && !access_permit_write(stp)) |
1da177e4 | 4920 | goto out; |
82c5ff1b | 4921 | if ((flags & RD_STATE) && !access_permit_read(stp)) |
1da177e4 LT |
4922 | goto out; |
4923 | status = nfs_ok; | |
4924 | out: | |
4925 | return status; | |
4926 | } | |
4927 | ||
b37ad28b | 4928 | static inline __be32 |
5ccb0066 | 4929 | check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags) |
1da177e4 | 4930 | { |
203a8c8e | 4931 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 4932 | return nfs_ok; |
c87fb4a3 | 4933 | else if (opens_in_grace(net)) { |
25985edc | 4934 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
4935 | * conflicting state; so we must wait out the grace period. */ |
4936 | return nfserr_grace; | |
4937 | } else if (flags & WR_STATE) | |
4938 | return nfs4_share_conflict(current_fh, | |
4939 | NFS4_SHARE_DENY_WRITE); | |
4940 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
4941 | return nfs4_share_conflict(current_fh, | |
4942 | NFS4_SHARE_DENY_READ); | |
4943 | } | |
4944 | ||
4945 | /* | |
4946 | * Allow READ/WRITE during grace period on recovered state only for files | |
4947 | * that are not able to provide mandatory locking. | |
4948 | */ | |
4949 | static inline int | |
5ccb0066 | 4950 | grace_disallows_io(struct net *net, struct inode *inode) |
1da177e4 | 4951 | { |
c87fb4a3 | 4952 | return opens_in_grace(net) && mandatory_lock(inode); |
1da177e4 LT |
4953 | } |
4954 | ||
57b7b43b | 4955 | static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 4956 | { |
6668958f AA |
4957 | /* |
4958 | * When sessions are used the stateid generation number is ignored | |
4959 | * when it is zero. | |
4960 | */ | |
28dde241 | 4961 | if (has_session && in->si_generation == 0) |
81b82965 BF |
4962 | return nfs_ok; |
4963 | ||
4964 | if (in->si_generation == ref->si_generation) | |
4965 | return nfs_ok; | |
6668958f | 4966 | |
0836f587 | 4967 | /* If the client sends us a stateid from the future, it's buggy: */ |
14b7f4a1 | 4968 | if (nfsd4_stateid_generation_after(in, ref)) |
0836f587 BF |
4969 | return nfserr_bad_stateid; |
4970 | /* | |
81b82965 BF |
4971 | * However, we could see a stateid from the past, even from a |
4972 | * non-buggy client. For example, if the client sends a lock | |
4973 | * while some IO is outstanding, the lock may bump si_generation | |
4974 | * while the IO is still in flight. The client could avoid that | |
4975 | * situation by waiting for responses on all the IO requests, | |
4976 | * but better performance may result in retrying IO that | |
4977 | * receives an old_stateid error if requests are rarely | |
4978 | * reordered in flight: | |
0836f587 | 4979 | */ |
81b82965 | 4980 | return nfserr_old_stateid; |
0836f587 BF |
4981 | } |
4982 | ||
03da3169 TM |
4983 | static __be32 nfsd4_stid_check_stateid_generation(stateid_t *in, struct nfs4_stid *s, bool has_session) |
4984 | { | |
4985 | __be32 ret; | |
4986 | ||
4987 | spin_lock(&s->sc_lock); | |
4988 | ret = nfsd4_verify_open_stid(s); | |
4989 | if (ret == nfs_ok) | |
4990 | ret = check_stateid_generation(in, &s->sc_stateid, has_session); | |
4991 | spin_unlock(&s->sc_lock); | |
4992 | return ret; | |
4993 | } | |
4994 | ||
ebe9cb3b CH |
4995 | static __be32 nfsd4_check_openowner_confirmed(struct nfs4_ol_stateid *ols) |
4996 | { | |
4997 | if (ols->st_stateowner->so_is_open_owner && | |
4998 | !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) | |
4999 | return nfserr_bad_stateid; | |
5000 | return nfs_ok; | |
5001 | } | |
5002 | ||
7df302f7 | 5003 | static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) |
17456804 | 5004 | { |
97b7e3b6 | 5005 | struct nfs4_stid *s; |
1af71cc8 | 5006 | __be32 status = nfserr_bad_stateid; |
17456804 | 5007 | |
ae254dac AE |
5008 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid) || |
5009 | CLOSE_STATEID(stateid)) | |
1af71cc8 | 5010 | return status; |
7df302f7 CL |
5011 | /* Client debugging aid. */ |
5012 | if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) { | |
5013 | char addr_str[INET6_ADDRSTRLEN]; | |
5014 | rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str, | |
5015 | sizeof(addr_str)); | |
5016 | pr_warn_ratelimited("NFSD: client %s testing state ID " | |
5017 | "with incorrect client ID\n", addr_str); | |
1af71cc8 | 5018 | return status; |
7df302f7 | 5019 | } |
1af71cc8 JL |
5020 | spin_lock(&cl->cl_lock); |
5021 | s = find_stateid_locked(cl, stateid); | |
97b7e3b6 | 5022 | if (!s) |
1af71cc8 | 5023 | goto out_unlock; |
03da3169 | 5024 | status = nfsd4_stid_check_stateid_generation(stateid, s, 1); |
17456804 | 5025 | if (status) |
1af71cc8 | 5026 | goto out_unlock; |
23340032 BF |
5027 | switch (s->sc_type) { |
5028 | case NFS4_DELEG_STID: | |
1af71cc8 JL |
5029 | status = nfs_ok; |
5030 | break; | |
3bd64a5b | 5031 | case NFS4_REVOKED_DELEG_STID: |
1af71cc8 JL |
5032 | status = nfserr_deleg_revoked; |
5033 | break; | |
23340032 BF |
5034 | case NFS4_OPEN_STID: |
5035 | case NFS4_LOCK_STID: | |
ebe9cb3b | 5036 | status = nfsd4_check_openowner_confirmed(openlockstateid(s)); |
1af71cc8 | 5037 | break; |
23340032 BF |
5038 | default: |
5039 | printk("unknown stateid type %x\n", s->sc_type); | |
b0fc29d6 | 5040 | /* Fallthrough */ |
23340032 | 5041 | case NFS4_CLOSED_STID: |
b0fc29d6 | 5042 | case NFS4_CLOSED_DELEG_STID: |
1af71cc8 | 5043 | status = nfserr_bad_stateid; |
23340032 | 5044 | } |
1af71cc8 JL |
5045 | out_unlock: |
5046 | spin_unlock(&cl->cl_lock); | |
5047 | return status; | |
17456804 BS |
5048 | } |
5049 | ||
cd61c522 | 5050 | __be32 |
2dd6e458 TM |
5051 | nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate, |
5052 | stateid_t *stateid, unsigned char typemask, | |
5053 | struct nfs4_stid **s, struct nfsd_net *nn) | |
38c2f4b1 | 5054 | { |
0eb6f20a | 5055 | __be32 status; |
95da1b3a AE |
5056 | bool return_revoked = false; |
5057 | ||
5058 | /* | |
5059 | * only return revoked delegations if explicitly asked. | |
5060 | * otherwise we report revoked or bad_stateid status. | |
5061 | */ | |
5062 | if (typemask & NFS4_REVOKED_DELEG_STID) | |
5063 | return_revoked = true; | |
5064 | else if (typemask & NFS4_DELEG_STID) | |
5065 | typemask |= NFS4_REVOKED_DELEG_STID; | |
38c2f4b1 | 5066 | |
ae254dac AE |
5067 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid) || |
5068 | CLOSE_STATEID(stateid)) | |
38c2f4b1 | 5069 | return nfserr_bad_stateid; |
4b24ca7d | 5070 | status = lookup_clientid(&stateid->si_opaque.so_clid, cstate, nn); |
a8a7c677 | 5071 | if (status == nfserr_stale_clientid) { |
4b24ca7d | 5072 | if (cstate->session) |
a8a7c677 | 5073 | return nfserr_bad_stateid; |
38c2f4b1 | 5074 | return nfserr_stale_stateid; |
a8a7c677 | 5075 | } |
0eb6f20a BF |
5076 | if (status) |
5077 | return status; | |
4b24ca7d | 5078 | *s = find_stateid_by_type(cstate->clp, stateid, typemask); |
38c2f4b1 BF |
5079 | if (!*s) |
5080 | return nfserr_bad_stateid; | |
95da1b3a AE |
5081 | if (((*s)->sc_type == NFS4_REVOKED_DELEG_STID) && !return_revoked) { |
5082 | nfs4_put_stid(*s); | |
5083 | if (cstate->minorversion) | |
5084 | return nfserr_deleg_revoked; | |
5085 | return nfserr_bad_stateid; | |
5086 | } | |
38c2f4b1 | 5087 | return nfs_ok; |
38c2f4b1 BF |
5088 | } |
5089 | ||
a0649b2d CH |
5090 | static struct file * |
5091 | nfs4_find_file(struct nfs4_stid *s, int flags) | |
5092 | { | |
af90f707 CH |
5093 | if (!s) |
5094 | return NULL; | |
5095 | ||
a0649b2d CH |
5096 | switch (s->sc_type) { |
5097 | case NFS4_DELEG_STID: | |
5098 | if (WARN_ON_ONCE(!s->sc_file->fi_deleg_file)) | |
5099 | return NULL; | |
5100 | return get_file(s->sc_file->fi_deleg_file); | |
5101 | case NFS4_OPEN_STID: | |
5102 | case NFS4_LOCK_STID: | |
5103 | if (flags & RD_STATE) | |
5104 | return find_readable_file(s->sc_file); | |
5105 | else | |
5106 | return find_writeable_file(s->sc_file); | |
5107 | break; | |
5108 | } | |
5109 | ||
5110 | return NULL; | |
5111 | } | |
5112 | ||
5113 | static __be32 | |
d8836f77 | 5114 | nfs4_check_olstateid(struct nfs4_ol_stateid *ols, int flags) |
a0649b2d CH |
5115 | { |
5116 | __be32 status; | |
5117 | ||
a0649b2d CH |
5118 | status = nfsd4_check_openowner_confirmed(ols); |
5119 | if (status) | |
5120 | return status; | |
5121 | return nfs4_check_openmode(ols, flags); | |
5122 | } | |
5123 | ||
af90f707 CH |
5124 | static __be32 |
5125 | nfs4_check_file(struct svc_rqst *rqstp, struct svc_fh *fhp, struct nfs4_stid *s, | |
5126 | struct file **filpp, bool *tmp_file, int flags) | |
5127 | { | |
5128 | int acc = (flags & RD_STATE) ? NFSD_MAY_READ : NFSD_MAY_WRITE; | |
5129 | struct file *file; | |
5130 | __be32 status; | |
5131 | ||
5132 | file = nfs4_find_file(s, flags); | |
5133 | if (file) { | |
5134 | status = nfsd_permission(rqstp, fhp->fh_export, fhp->fh_dentry, | |
5135 | acc | NFSD_MAY_OWNER_OVERRIDE); | |
5136 | if (status) { | |
5137 | fput(file); | |
5138 | return status; | |
5139 | } | |
5140 | ||
5141 | *filpp = file; | |
5142 | } else { | |
5143 | status = nfsd_open(rqstp, fhp, S_IFREG, acc, filpp); | |
5144 | if (status) | |
5145 | return status; | |
5146 | ||
5147 | if (tmp_file) | |
5148 | *tmp_file = true; | |
5149 | } | |
5150 | ||
5151 | return 0; | |
5152 | } | |
5153 | ||
1da177e4 | 5154 | /* |
a0649b2d CH |
5155 | * Checks for stateid operations |
5156 | */ | |
b37ad28b | 5157 | __be32 |
af90f707 | 5158 | nfs4_preprocess_stateid_op(struct svc_rqst *rqstp, |
aa0d6aed AS |
5159 | struct nfsd4_compound_state *cstate, struct svc_fh *fhp, |
5160 | stateid_t *stateid, int flags, struct file **filpp, bool *tmp_file) | |
1da177e4 | 5161 | { |
a0649b2d | 5162 | struct inode *ino = d_inode(fhp->fh_dentry); |
af90f707 | 5163 | struct net *net = SVC_NET(rqstp); |
3320fef1 | 5164 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
af90f707 | 5165 | struct nfs4_stid *s = NULL; |
b37ad28b | 5166 | __be32 status; |
1da177e4 | 5167 | |
1da177e4 LT |
5168 | if (filpp) |
5169 | *filpp = NULL; | |
af90f707 CH |
5170 | if (tmp_file) |
5171 | *tmp_file = false; | |
1da177e4 | 5172 | |
5ccb0066 | 5173 | if (grace_disallows_io(net, ino)) |
1da177e4 LT |
5174 | return nfserr_grace; |
5175 | ||
af90f707 CH |
5176 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { |
5177 | status = check_special_stateids(net, fhp, stateid, flags); | |
5178 | goto done; | |
5179 | } | |
1da177e4 | 5180 | |
2dd6e458 | 5181 | status = nfsd4_lookup_stateid(cstate, stateid, |
db24b3b4 | 5182 | NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, |
2dd6e458 | 5183 | &s, nn); |
38c2f4b1 | 5184 | if (status) |
c2d1d6a8 | 5185 | return status; |
03da3169 | 5186 | status = nfsd4_stid_check_stateid_generation(stateid, s, |
a0649b2d | 5187 | nfsd4_has_session(cstate)); |
69064a27 BF |
5188 | if (status) |
5189 | goto out; | |
a0649b2d | 5190 | |
f7a4d872 BF |
5191 | switch (s->sc_type) { |
5192 | case NFS4_DELEG_STID: | |
a0649b2d | 5193 | status = nfs4_check_delegmode(delegstateid(s), flags); |
f7a4d872 BF |
5194 | break; |
5195 | case NFS4_OPEN_STID: | |
5196 | case NFS4_LOCK_STID: | |
d8836f77 | 5197 | status = nfs4_check_olstateid(openlockstateid(s), flags); |
f7a4d872 BF |
5198 | break; |
5199 | default: | |
14bcab1a | 5200 | status = nfserr_bad_stateid; |
a0649b2d CH |
5201 | break; |
5202 | } | |
8fcd461d JL |
5203 | if (status) |
5204 | goto out; | |
5205 | status = nfs4_check_fh(fhp, s); | |
a0649b2d | 5206 | |
af90f707 CH |
5207 | done: |
5208 | if (!status && filpp) | |
5209 | status = nfs4_check_file(rqstp, fhp, s, filpp, tmp_file, flags); | |
1da177e4 | 5210 | out: |
af90f707 CH |
5211 | if (s) |
5212 | nfs4_put_stid(s); | |
1da177e4 LT |
5213 | return status; |
5214 | } | |
5215 | ||
17456804 BS |
5216 | /* |
5217 | * Test if the stateid is valid | |
5218 | */ | |
5219 | __be32 | |
5220 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
eb69853d | 5221 | union nfsd4_op_u *u) |
17456804 | 5222 | { |
eb69853d | 5223 | struct nfsd4_test_stateid *test_stateid = &u->test_stateid; |
03cfb420 BS |
5224 | struct nfsd4_test_stateid_id *stateid; |
5225 | struct nfs4_client *cl = cstate->session->se_client; | |
5226 | ||
03cfb420 | 5227 | list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) |
7df302f7 CL |
5228 | stateid->ts_id_status = |
5229 | nfsd4_validate_stateid(cl, &stateid->ts_id_stateid); | |
03cfb420 | 5230 | |
17456804 BS |
5231 | return nfs_ok; |
5232 | } | |
5233 | ||
42691398 CL |
5234 | static __be32 |
5235 | nfsd4_free_lock_stateid(stateid_t *stateid, struct nfs4_stid *s) | |
5236 | { | |
5237 | struct nfs4_ol_stateid *stp = openlockstateid(s); | |
5238 | __be32 ret; | |
5239 | ||
659aefb6 TM |
5240 | ret = nfsd4_lock_ol_stateid(stp); |
5241 | if (ret) | |
5242 | goto out_put_stid; | |
42691398 CL |
5243 | |
5244 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); | |
5245 | if (ret) | |
5246 | goto out; | |
5247 | ||
5248 | ret = nfserr_locks_held; | |
5249 | if (check_for_locks(stp->st_stid.sc_file, | |
5250 | lockowner(stp->st_stateowner))) | |
5251 | goto out; | |
5252 | ||
5253 | release_lock_stateid(stp); | |
5254 | ret = nfs_ok; | |
5255 | ||
5256 | out: | |
5257 | mutex_unlock(&stp->st_mutex); | |
659aefb6 | 5258 | out_put_stid: |
42691398 CL |
5259 | nfs4_put_stid(s); |
5260 | return ret; | |
5261 | } | |
5262 | ||
e1ca12df BS |
5263 | __be32 |
5264 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
eb69853d | 5265 | union nfsd4_op_u *u) |
e1ca12df | 5266 | { |
eb69853d | 5267 | struct nfsd4_free_stateid *free_stateid = &u->free_stateid; |
e1ca12df | 5268 | stateid_t *stateid = &free_stateid->fr_stateid; |
2da1cec7 | 5269 | struct nfs4_stid *s; |
3bd64a5b | 5270 | struct nfs4_delegation *dp; |
38c2f4b1 | 5271 | struct nfs4_client *cl = cstate->session->se_client; |
2da1cec7 | 5272 | __be32 ret = nfserr_bad_stateid; |
e1ca12df | 5273 | |
1af71cc8 JL |
5274 | spin_lock(&cl->cl_lock); |
5275 | s = find_stateid_locked(cl, stateid); | |
2da1cec7 | 5276 | if (!s) |
1af71cc8 | 5277 | goto out_unlock; |
03da3169 | 5278 | spin_lock(&s->sc_lock); |
2da1cec7 BF |
5279 | switch (s->sc_type) { |
5280 | case NFS4_DELEG_STID: | |
e1ca12df | 5281 | ret = nfserr_locks_held; |
1af71cc8 | 5282 | break; |
2da1cec7 | 5283 | case NFS4_OPEN_STID: |
2da1cec7 BF |
5284 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); |
5285 | if (ret) | |
1af71cc8 JL |
5286 | break; |
5287 | ret = nfserr_locks_held; | |
f7a4d872 | 5288 | break; |
1af71cc8 | 5289 | case NFS4_LOCK_STID: |
03da3169 | 5290 | spin_unlock(&s->sc_lock); |
a15dfcd5 | 5291 | refcount_inc(&s->sc_count); |
1af71cc8 | 5292 | spin_unlock(&cl->cl_lock); |
42691398 | 5293 | ret = nfsd4_free_lock_stateid(stateid, s); |
1af71cc8 | 5294 | goto out; |
3bd64a5b | 5295 | case NFS4_REVOKED_DELEG_STID: |
03da3169 | 5296 | spin_unlock(&s->sc_lock); |
3bd64a5b | 5297 | dp = delegstateid(s); |
2d4a532d JL |
5298 | list_del_init(&dp->dl_recall_lru); |
5299 | spin_unlock(&cl->cl_lock); | |
6011695d | 5300 | nfs4_put_stid(s); |
3bd64a5b | 5301 | ret = nfs_ok; |
1af71cc8 JL |
5302 | goto out; |
5303 | /* Default falls through and returns nfserr_bad_stateid */ | |
e1ca12df | 5304 | } |
03da3169 | 5305 | spin_unlock(&s->sc_lock); |
1af71cc8 JL |
5306 | out_unlock: |
5307 | spin_unlock(&cl->cl_lock); | |
e1ca12df | 5308 | out: |
e1ca12df BS |
5309 | return ret; |
5310 | } | |
5311 | ||
4c4cd222 N |
5312 | static inline int |
5313 | setlkflg (int type) | |
5314 | { | |
5315 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
5316 | RD_STATE : WR_STATE; | |
5317 | } | |
1da177e4 | 5318 | |
dcef0413 | 5319 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
c0a5d93e BF |
5320 | { |
5321 | struct svc_fh *current_fh = &cstate->current_fh; | |
5322 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
5323 | __be32 status; | |
5324 | ||
c0a5d93e BF |
5325 | status = nfsd4_check_seqid(cstate, sop, seqid); |
5326 | if (status) | |
5327 | return status; | |
9271d7e5 TM |
5328 | status = nfsd4_lock_ol_stateid(stp); |
5329 | if (status != nfs_ok) | |
5330 | return status; | |
f7a4d872 | 5331 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); |
35a92fe8 JL |
5332 | if (status == nfs_ok) |
5333 | status = nfs4_check_fh(current_fh, &stp->st_stid); | |
5334 | if (status != nfs_ok) | |
feb9dad5 | 5335 | mutex_unlock(&stp->st_mutex); |
35a92fe8 | 5336 | return status; |
c0a5d93e BF |
5337 | } |
5338 | ||
1da177e4 LT |
5339 | /* |
5340 | * Checks for sequence id mutating operations. | |
5341 | */ | |
b37ad28b | 5342 | static __be32 |
dd453dfd | 5343 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2288d0e3 | 5344 | stateid_t *stateid, char typemask, |
3320fef1 SK |
5345 | struct nfs4_ol_stateid **stpp, |
5346 | struct nfsd_net *nn) | |
1da177e4 | 5347 | { |
0836f587 | 5348 | __be32 status; |
38c2f4b1 | 5349 | struct nfs4_stid *s; |
e17f99b7 | 5350 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 5351 | |
8c10cbdb BH |
5352 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
5353 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 5354 | |
1da177e4 | 5355 | *stpp = NULL; |
2dd6e458 | 5356 | status = nfsd4_lookup_stateid(cstate, stateid, typemask, &s, nn); |
c0a5d93e BF |
5357 | if (status) |
5358 | return status; | |
e17f99b7 | 5359 | stp = openlockstateid(s); |
58fb12e6 | 5360 | nfsd4_cstate_assign_replay(cstate, stp->st_stateowner); |
1da177e4 | 5361 | |
e17f99b7 | 5362 | status = nfs4_seqid_op_checks(cstate, stateid, seqid, stp); |
fd911011 | 5363 | if (!status) |
e17f99b7 | 5364 | *stpp = stp; |
fd911011 TM |
5365 | else |
5366 | nfs4_put_stid(&stp->st_stid); | |
e17f99b7 | 5367 | return status; |
c0a5d93e | 5368 | } |
39325bd0 | 5369 | |
3320fef1 SK |
5370 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
5371 | stateid_t *stateid, struct nfs4_ol_stateid **stpp, struct nfsd_net *nn) | |
c0a5d93e BF |
5372 | { |
5373 | __be32 status; | |
5374 | struct nfs4_openowner *oo; | |
4cbfc9f7 | 5375 | struct nfs4_ol_stateid *stp; |
1da177e4 | 5376 | |
c0a5d93e | 5377 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
4cbfc9f7 | 5378 | NFS4_OPEN_STID, &stp, nn); |
7a8711c9 BF |
5379 | if (status) |
5380 | return status; | |
4cbfc9f7 TM |
5381 | oo = openowner(stp->st_stateowner); |
5382 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { | |
feb9dad5 | 5383 | mutex_unlock(&stp->st_mutex); |
4cbfc9f7 | 5384 | nfs4_put_stid(&stp->st_stid); |
3a4f98bb | 5385 | return nfserr_bad_stateid; |
4cbfc9f7 TM |
5386 | } |
5387 | *stpp = stp; | |
3a4f98bb | 5388 | return nfs_ok; |
1da177e4 LT |
5389 | } |
5390 | ||
b37ad28b | 5391 | __be32 |
ca364317 | 5392 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 5393 | union nfsd4_op_u *u) |
1da177e4 | 5394 | { |
eb69853d | 5395 | struct nfsd4_open_confirm *oc = &u->open_confirm; |
b37ad28b | 5396 | __be32 status; |
fe0750e5 | 5397 | struct nfs4_openowner *oo; |
dcef0413 | 5398 | struct nfs4_ol_stateid *stp; |
3320fef1 | 5399 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 5400 | |
a6a9f18f AV |
5401 | dprintk("NFSD: nfsd4_open_confirm on file %pd\n", |
5402 | cstate->current_fh.fh_dentry); | |
1da177e4 | 5403 | |
ca364317 | 5404 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
5405 | if (status) |
5406 | return status; | |
1da177e4 | 5407 | |
9072d5c6 | 5408 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 5409 | oc->oc_seqid, &oc->oc_req_stateid, |
3320fef1 | 5410 | NFS4_OPEN_STID, &stp, nn); |
9072d5c6 | 5411 | if (status) |
68b66e82 | 5412 | goto out; |
fe0750e5 | 5413 | oo = openowner(stp->st_stateowner); |
68b66e82 | 5414 | status = nfserr_bad_stateid; |
35a92fe8 | 5415 | if (oo->oo_flags & NFS4_OO_CONFIRMED) { |
feb9dad5 | 5416 | mutex_unlock(&stp->st_mutex); |
2585fc79 | 5417 | goto put_stateid; |
35a92fe8 | 5418 | } |
dad1c067 | 5419 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
9767feb2 | 5420 | nfs4_inc_and_copy_stateid(&oc->oc_resp_stateid, &stp->st_stid); |
feb9dad5 | 5421 | mutex_unlock(&stp->st_mutex); |
8c10cbdb | 5422 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
dcef0413 | 5423 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); |
c7b9a459 | 5424 | |
2a4317c5 | 5425 | nfsd4_client_record_create(oo->oo_owner.so_client); |
68b66e82 | 5426 | status = nfs_ok; |
2585fc79 TM |
5427 | put_stateid: |
5428 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 5429 | out: |
9411b1d4 | 5430 | nfsd4_bump_seqid(cstate, status); |
1da177e4 LT |
5431 | return status; |
5432 | } | |
5433 | ||
6409a5a6 | 5434 | static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) |
1da177e4 | 5435 | { |
82c5ff1b | 5436 | if (!test_access(access, stp)) |
6409a5a6 | 5437 | return; |
11b9164a | 5438 | nfs4_file_put_access(stp->st_stid.sc_file, access); |
82c5ff1b | 5439 | clear_access(access, stp); |
6409a5a6 | 5440 | } |
f197c271 | 5441 | |
6409a5a6 BF |
5442 | static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) |
5443 | { | |
5444 | switch (to_access) { | |
5445 | case NFS4_SHARE_ACCESS_READ: | |
5446 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); | |
5447 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
5448 | break; | |
5449 | case NFS4_SHARE_ACCESS_WRITE: | |
5450 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); | |
5451 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
5452 | break; | |
5453 | case NFS4_SHARE_ACCESS_BOTH: | |
5454 | break; | |
5455 | default: | |
063b0fb9 | 5456 | WARN_ON_ONCE(1); |
1da177e4 LT |
5457 | } |
5458 | } | |
5459 | ||
b37ad28b | 5460 | __be32 |
ca364317 | 5461 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
eb69853d | 5462 | struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) |
1da177e4 | 5463 | { |
eb69853d | 5464 | struct nfsd4_open_downgrade *od = &u->open_downgrade; |
b37ad28b | 5465 | __be32 status; |
dcef0413 | 5466 | struct nfs4_ol_stateid *stp; |
3320fef1 | 5467 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 5468 | |
a6a9f18f AV |
5469 | dprintk("NFSD: nfsd4_open_downgrade on file %pd\n", |
5470 | cstate->current_fh.fh_dentry); | |
1da177e4 | 5471 | |
c30e92df | 5472 | /* We don't yet support WANT bits: */ |
2c8bd7e0 BH |
5473 | if (od->od_deleg_want) |
5474 | dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, | |
5475 | od->od_deleg_want); | |
1da177e4 | 5476 | |
c0a5d93e | 5477 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
3320fef1 | 5478 | &od->od_stateid, &stp, nn); |
9072d5c6 | 5479 | if (status) |
1da177e4 | 5480 | goto out; |
1da177e4 | 5481 | status = nfserr_inval; |
82c5ff1b | 5482 | if (!test_access(od->od_share_access, stp)) { |
c11c591f | 5483 | dprintk("NFSD: access not a subset of current bitmap: 0x%hhx, input access=%08x\n", |
1da177e4 | 5484 | stp->st_access_bmap, od->od_share_access); |
0667b1e9 | 5485 | goto put_stateid; |
1da177e4 | 5486 | } |
ce0fc43c | 5487 | if (!test_deny(od->od_share_deny, stp)) { |
c11c591f | 5488 | dprintk("NFSD: deny not a subset of current bitmap: 0x%hhx, input deny=%08x\n", |
1da177e4 | 5489 | stp->st_deny_bmap, od->od_share_deny); |
0667b1e9 | 5490 | goto put_stateid; |
1da177e4 | 5491 | } |
6409a5a6 | 5492 | nfs4_stateid_downgrade(stp, od->od_share_access); |
ce0fc43c | 5493 | reset_union_bmap_deny(od->od_share_deny, stp); |
9767feb2 | 5494 | nfs4_inc_and_copy_stateid(&od->od_stateid, &stp->st_stid); |
1da177e4 | 5495 | status = nfs_ok; |
0667b1e9 | 5496 | put_stateid: |
feb9dad5 | 5497 | mutex_unlock(&stp->st_mutex); |
0667b1e9 | 5498 | nfs4_put_stid(&stp->st_stid); |
1da177e4 | 5499 | out: |
9411b1d4 | 5500 | nfsd4_bump_seqid(cstate, status); |
1da177e4 LT |
5501 | return status; |
5502 | } | |
5503 | ||
f7a4d872 BF |
5504 | static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) |
5505 | { | |
acf9295b | 5506 | struct nfs4_client *clp = s->st_stid.sc_client; |
e8568739 | 5507 | bool unhashed; |
d83017f9 | 5508 | LIST_HEAD(reaplist); |
acf9295b | 5509 | |
2c41beb0 | 5510 | spin_lock(&clp->cl_lock); |
e8568739 | 5511 | unhashed = unhash_open_stateid(s, &reaplist); |
acf9295b | 5512 | |
d83017f9 | 5513 | if (clp->cl_minorversion) { |
e8568739 JL |
5514 | if (unhashed) |
5515 | put_ol_stateid_locked(s, &reaplist); | |
d83017f9 JL |
5516 | spin_unlock(&clp->cl_lock); |
5517 | free_ol_stateid_reaplist(&reaplist); | |
5518 | } else { | |
5519 | spin_unlock(&clp->cl_lock); | |
5520 | free_ol_stateid_reaplist(&reaplist); | |
e8568739 JL |
5521 | if (unhashed) |
5522 | move_to_close_lru(s, clp->net); | |
d83017f9 | 5523 | } |
38c387b5 BF |
5524 | } |
5525 | ||
1da177e4 LT |
5526 | /* |
5527 | * nfs4_unlock_state() called after encode | |
5528 | */ | |
b37ad28b | 5529 | __be32 |
ca364317 | 5530 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 5531 | union nfsd4_op_u *u) |
1da177e4 | 5532 | { |
eb69853d | 5533 | struct nfsd4_close *close = &u->close; |
b37ad28b | 5534 | __be32 status; |
dcef0413 | 5535 | struct nfs4_ol_stateid *stp; |
3320fef1 SK |
5536 | struct net *net = SVC_NET(rqstp); |
5537 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 | 5538 | |
a6a9f18f AV |
5539 | dprintk("NFSD: nfsd4_close on file %pd\n", |
5540 | cstate->current_fh.fh_dentry); | |
1da177e4 | 5541 | |
f7a4d872 BF |
5542 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
5543 | &close->cl_stateid, | |
5544 | NFS4_OPEN_STID|NFS4_CLOSED_STID, | |
3320fef1 | 5545 | &stp, nn); |
9411b1d4 | 5546 | nfsd4_bump_seqid(cstate, status); |
9072d5c6 | 5547 | if (status) |
1da177e4 | 5548 | goto out; |
15ca08d3 TM |
5549 | |
5550 | stp->st_stid.sc_type = NFS4_CLOSED_STID; | |
bd2decac JL |
5551 | |
5552 | /* | |
5553 | * Technically we don't _really_ have to increment or copy it, since | |
5554 | * it should just be gone after this operation and we clobber the | |
5555 | * copied value below, but we continue to do so here just to ensure | |
5556 | * that racing ops see that there was a state change. | |
5557 | */ | |
9767feb2 | 5558 | nfs4_inc_and_copy_stateid(&close->cl_stateid, &stp->st_stid); |
1da177e4 | 5559 | |
f7a4d872 | 5560 | nfsd4_close_open_stateid(stp); |
15ca08d3 | 5561 | mutex_unlock(&stp->st_mutex); |
8a0b589d | 5562 | |
bd2decac JL |
5563 | /* v4.1+ suggests that we send a special stateid in here, since the |
5564 | * clients should just ignore this anyway. Since this is not useful | |
5565 | * for v4.0 clients either, we set it to the special close_stateid | |
5566 | * universally. | |
5567 | * | |
5568 | * See RFC5661 section 18.2.4, and RFC7530 section 16.2.5 | |
5569 | */ | |
5570 | memcpy(&close->cl_stateid, &close_stateid, sizeof(close->cl_stateid)); | |
fb500a7c | 5571 | |
8a0b589d TM |
5572 | /* put reference from nfs4_preprocess_seqid_op */ |
5573 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 5574 | out: |
1da177e4 LT |
5575 | return status; |
5576 | } | |
5577 | ||
b37ad28b | 5578 | __be32 |
ca364317 | 5579 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 5580 | union nfsd4_op_u *u) |
1da177e4 | 5581 | { |
eb69853d | 5582 | struct nfsd4_delegreturn *dr = &u->delegreturn; |
203a8c8e BF |
5583 | struct nfs4_delegation *dp; |
5584 | stateid_t *stateid = &dr->dr_stateid; | |
38c2f4b1 | 5585 | struct nfs4_stid *s; |
b37ad28b | 5586 | __be32 status; |
3320fef1 | 5587 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 5588 | |
ca364317 | 5589 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e | 5590 | return status; |
1da177e4 | 5591 | |
2dd6e458 | 5592 | status = nfsd4_lookup_stateid(cstate, stateid, NFS4_DELEG_STID, &s, nn); |
38c2f4b1 | 5593 | if (status) |
203a8c8e | 5594 | goto out; |
38c2f4b1 | 5595 | dp = delegstateid(s); |
03da3169 | 5596 | status = nfsd4_stid_check_stateid_generation(stateid, &dp->dl_stid, nfsd4_has_session(cstate)); |
203a8c8e | 5597 | if (status) |
fd911011 | 5598 | goto put_stateid; |
203a8c8e | 5599 | |
3bd64a5b | 5600 | destroy_delegation(dp); |
fd911011 TM |
5601 | put_stateid: |
5602 | nfs4_put_stid(&dp->dl_stid); | |
1da177e4 LT |
5603 | out: |
5604 | return status; | |
5605 | } | |
5606 | ||
87df4de8 BH |
5607 | static inline u64 |
5608 | end_offset(u64 start, u64 len) | |
5609 | { | |
5610 | u64 end; | |
5611 | ||
5612 | end = start + len; | |
5613 | return end >= start ? end: NFS4_MAX_UINT64; | |
5614 | } | |
5615 | ||
5616 | /* last octet in a range */ | |
5617 | static inline u64 | |
5618 | last_byte_offset(u64 start, u64 len) | |
5619 | { | |
5620 | u64 end; | |
5621 | ||
063b0fb9 | 5622 | WARN_ON_ONCE(!len); |
87df4de8 BH |
5623 | end = start + len; |
5624 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
5625 | } | |
5626 | ||
1da177e4 LT |
5627 | /* |
5628 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
5629 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
5630 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
5631 | * locking, this prevents us from being completely protocol-compliant. The | |
5632 | * real solution to this problem is to start using unsigned file offsets in | |
5633 | * the VFS, but this is a very deep change! | |
5634 | */ | |
5635 | static inline void | |
5636 | nfs4_transform_lock_offset(struct file_lock *lock) | |
5637 | { | |
5638 | if (lock->fl_start < 0) | |
5639 | lock->fl_start = OFFSET_MAX; | |
5640 | if (lock->fl_end < 0) | |
5641 | lock->fl_end = OFFSET_MAX; | |
5642 | } | |
5643 | ||
cae80b30 JL |
5644 | static fl_owner_t |
5645 | nfsd4_fl_get_owner(fl_owner_t owner) | |
aef9583b | 5646 | { |
cae80b30 JL |
5647 | struct nfs4_lockowner *lo = (struct nfs4_lockowner *)owner; |
5648 | ||
5649 | nfs4_get_stateowner(&lo->lo_owner); | |
5650 | return owner; | |
aef9583b KM |
5651 | } |
5652 | ||
cae80b30 JL |
5653 | static void |
5654 | nfsd4_fl_put_owner(fl_owner_t owner) | |
aef9583b | 5655 | { |
cae80b30 | 5656 | struct nfs4_lockowner *lo = (struct nfs4_lockowner *)owner; |
aef9583b | 5657 | |
cae80b30 | 5658 | if (lo) |
aef9583b | 5659 | nfs4_put_stateowner(&lo->lo_owner); |
aef9583b KM |
5660 | } |
5661 | ||
76d348fa JL |
5662 | static void |
5663 | nfsd4_lm_notify(struct file_lock *fl) | |
5664 | { | |
5665 | struct nfs4_lockowner *lo = (struct nfs4_lockowner *)fl->fl_owner; | |
5666 | struct net *net = lo->lo_owner.so_client->net; | |
5667 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
5668 | struct nfsd4_blocked_lock *nbl = container_of(fl, | |
5669 | struct nfsd4_blocked_lock, nbl_lock); | |
5670 | bool queue = false; | |
5671 | ||
7919d0a2 | 5672 | /* An empty list means that something else is going to be using it */ |
0cc11a61 | 5673 | spin_lock(&nn->blocked_locks_lock); |
76d348fa JL |
5674 | if (!list_empty(&nbl->nbl_list)) { |
5675 | list_del_init(&nbl->nbl_list); | |
7919d0a2 | 5676 | list_del_init(&nbl->nbl_lru); |
76d348fa JL |
5677 | queue = true; |
5678 | } | |
0cc11a61 | 5679 | spin_unlock(&nn->blocked_locks_lock); |
76d348fa JL |
5680 | |
5681 | if (queue) | |
5682 | nfsd4_run_cb(&nbl->nbl_cb); | |
5683 | } | |
5684 | ||
7b021967 | 5685 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
76d348fa | 5686 | .lm_notify = nfsd4_lm_notify, |
aef9583b KM |
5687 | .lm_get_owner = nfsd4_fl_get_owner, |
5688 | .lm_put_owner = nfsd4_fl_put_owner, | |
d5b9026a | 5689 | }; |
1da177e4 LT |
5690 | |
5691 | static inline void | |
5692 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
5693 | { | |
fe0750e5 | 5694 | struct nfs4_lockowner *lo; |
1da177e4 | 5695 | |
d5b9026a | 5696 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 BF |
5697 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
5698 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, | |
5699 | lo->lo_owner.so_owner.len, GFP_KERNEL); | |
7c13f344 BF |
5700 | if (!deny->ld_owner.data) |
5701 | /* We just don't care that much */ | |
5702 | goto nevermind; | |
fe0750e5 BF |
5703 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
5704 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; | |
d5b9026a | 5705 | } else { |
7c13f344 BF |
5706 | nevermind: |
5707 | deny->ld_owner.len = 0; | |
5708 | deny->ld_owner.data = NULL; | |
d5b9026a N |
5709 | deny->ld_clientid.cl_boot = 0; |
5710 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
5711 | } |
5712 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
5713 | deny->ld_length = NFS4_MAX_UINT64; |
5714 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
5715 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
5716 | deny->ld_type = NFS4_READ_LT; | |
5717 | if (fl->fl_type != F_RDLCK) | |
5718 | deny->ld_type = NFS4_WRITE_LT; | |
5719 | } | |
5720 | ||
fe0750e5 | 5721 | static struct nfs4_lockowner * |
c8623999 | 5722 | find_lockowner_str_locked(struct nfs4_client *clp, struct xdr_netobj *owner) |
1da177e4 | 5723 | { |
d4f0489f | 5724 | unsigned int strhashval = ownerstr_hashval(owner); |
b3c32bcd | 5725 | struct nfs4_stateowner *so; |
1da177e4 | 5726 | |
0a880a28 TM |
5727 | lockdep_assert_held(&clp->cl_lock); |
5728 | ||
d4f0489f TM |
5729 | list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[strhashval], |
5730 | so_strhash) { | |
b3c32bcd TM |
5731 | if (so->so_is_open_owner) |
5732 | continue; | |
b5971afa KM |
5733 | if (same_owner_str(so, owner)) |
5734 | return lockowner(nfs4_get_stateowner(so)); | |
1da177e4 LT |
5735 | } |
5736 | return NULL; | |
5737 | } | |
5738 | ||
c58c6610 | 5739 | static struct nfs4_lockowner * |
c8623999 | 5740 | find_lockowner_str(struct nfs4_client *clp, struct xdr_netobj *owner) |
c58c6610 TM |
5741 | { |
5742 | struct nfs4_lockowner *lo; | |
5743 | ||
d4f0489f | 5744 | spin_lock(&clp->cl_lock); |
c8623999 | 5745 | lo = find_lockowner_str_locked(clp, owner); |
d4f0489f | 5746 | spin_unlock(&clp->cl_lock); |
c58c6610 TM |
5747 | return lo; |
5748 | } | |
5749 | ||
8f4b54c5 JL |
5750 | static void nfs4_unhash_lockowner(struct nfs4_stateowner *sop) |
5751 | { | |
c58c6610 | 5752 | unhash_lockowner_locked(lockowner(sop)); |
8f4b54c5 JL |
5753 | } |
5754 | ||
6b180f0b JL |
5755 | static void nfs4_free_lockowner(struct nfs4_stateowner *sop) |
5756 | { | |
5757 | struct nfs4_lockowner *lo = lockowner(sop); | |
5758 | ||
5759 | kmem_cache_free(lockowner_slab, lo); | |
5760 | } | |
5761 | ||
5762 | static const struct nfs4_stateowner_operations lockowner_ops = { | |
8f4b54c5 JL |
5763 | .so_unhash = nfs4_unhash_lockowner, |
5764 | .so_free = nfs4_free_lockowner, | |
6b180f0b JL |
5765 | }; |
5766 | ||
1da177e4 LT |
5767 | /* |
5768 | * Alloc a lock owner structure. | |
5769 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 5770 | * occurred. |
1da177e4 | 5771 | * |
16bfdaaf | 5772 | * strhashval = ownerstr_hashval |
1da177e4 | 5773 | */ |
fe0750e5 | 5774 | static struct nfs4_lockowner * |
c58c6610 TM |
5775 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, |
5776 | struct nfs4_ol_stateid *open_stp, | |
5777 | struct nfsd4_lock *lock) | |
5778 | { | |
c58c6610 | 5779 | struct nfs4_lockowner *lo, *ret; |
1da177e4 | 5780 | |
fe0750e5 BF |
5781 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
5782 | if (!lo) | |
1da177e4 | 5783 | return NULL; |
76d348fa | 5784 | INIT_LIST_HEAD(&lo->lo_blocked); |
fe0750e5 BF |
5785 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
5786 | lo->lo_owner.so_is_open_owner = 0; | |
5db1c03f | 5787 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid; |
6b180f0b | 5788 | lo->lo_owner.so_ops = &lockowner_ops; |
d4f0489f | 5789 | spin_lock(&clp->cl_lock); |
c8623999 | 5790 | ret = find_lockowner_str_locked(clp, &lock->lk_new_owner); |
c58c6610 TM |
5791 | if (ret == NULL) { |
5792 | list_add(&lo->lo_owner.so_strhash, | |
d4f0489f | 5793 | &clp->cl_ownerstr_hashtbl[strhashval]); |
c58c6610 TM |
5794 | ret = lo; |
5795 | } else | |
d50ffded KM |
5796 | nfs4_free_stateowner(&lo->lo_owner); |
5797 | ||
d4f0489f | 5798 | spin_unlock(&clp->cl_lock); |
340f0ba1 | 5799 | return ret; |
1da177e4 LT |
5800 | } |
5801 | ||
fd1fd685 TM |
5802 | static struct nfs4_ol_stateid * |
5803 | find_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp) | |
5804 | { | |
5805 | struct nfs4_ol_stateid *lst; | |
5806 | struct nfs4_client *clp = lo->lo_owner.so_client; | |
5807 | ||
5808 | lockdep_assert_held(&clp->cl_lock); | |
5809 | ||
5810 | list_for_each_entry(lst, &lo->lo_owner.so_stateids, st_perstateowner) { | |
5811 | if (lst->st_stid.sc_type != NFS4_LOCK_STID) | |
5812 | continue; | |
5813 | if (lst->st_stid.sc_file == fp) { | |
5814 | refcount_inc(&lst->st_stid.sc_count); | |
5815 | return lst; | |
5816 | } | |
5817 | } | |
5818 | return NULL; | |
5819 | } | |
5820 | ||
beeca19c | 5821 | static struct nfs4_ol_stateid * |
356a95ec JL |
5822 | init_lock_stateid(struct nfs4_ol_stateid *stp, struct nfs4_lockowner *lo, |
5823 | struct nfs4_file *fp, struct inode *inode, | |
5824 | struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 5825 | { |
d3b313a4 | 5826 | struct nfs4_client *clp = lo->lo_owner.so_client; |
beeca19c | 5827 | struct nfs4_ol_stateid *retstp; |
1da177e4 | 5828 | |
beeca19c | 5829 | mutex_init(&stp->st_mutex); |
4f34bd05 | 5830 | mutex_lock_nested(&stp->st_mutex, OPEN_STATEID_MUTEX); |
beeca19c TM |
5831 | retry: |
5832 | spin_lock(&clp->cl_lock); | |
5833 | spin_lock(&fp->fi_lock); | |
5834 | retstp = find_lock_stateid(lo, fp); | |
5835 | if (retstp) | |
5836 | goto out_unlock; | |
356a95ec | 5837 | |
a15dfcd5 | 5838 | refcount_inc(&stp->st_stid.sc_count); |
3abdb607 | 5839 | stp->st_stid.sc_type = NFS4_LOCK_STID; |
b5971afa | 5840 | stp->st_stateowner = nfs4_get_stateowner(&lo->lo_owner); |
13cd2184 | 5841 | get_nfs4_file(fp); |
11b9164a | 5842 | stp->st_stid.sc_file = fp; |
0997b173 | 5843 | stp->st_access_bmap = 0; |
1da177e4 | 5844 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 5845 | stp->st_openstp = open_stp; |
3c87b9b7 | 5846 | list_add(&stp->st_locks, &open_stp->st_locks); |
1c755dc1 | 5847 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
1d31a253 | 5848 | list_add(&stp->st_perfile, &fp->fi_stateids); |
beeca19c | 5849 | out_unlock: |
1d31a253 | 5850 | spin_unlock(&fp->fi_lock); |
beeca19c TM |
5851 | spin_unlock(&clp->cl_lock); |
5852 | if (retstp) { | |
5853 | if (nfsd4_lock_ol_stateid(retstp) != nfs_ok) { | |
5854 | nfs4_put_stid(&retstp->st_stid); | |
5855 | goto retry; | |
5856 | } | |
5857 | /* To keep mutex tracking happy */ | |
5858 | mutex_unlock(&stp->st_mutex); | |
5859 | stp = retstp; | |
5860 | } | |
5861 | return stp; | |
1da177e4 LT |
5862 | } |
5863 | ||
356a95ec JL |
5864 | static struct nfs4_ol_stateid * |
5865 | find_or_create_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fi, | |
5866 | struct inode *inode, struct nfs4_ol_stateid *ost, | |
5867 | bool *new) | |
5868 | { | |
5869 | struct nfs4_stid *ns = NULL; | |
5870 | struct nfs4_ol_stateid *lst; | |
5871 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); | |
5872 | struct nfs4_client *clp = oo->oo_owner.so_client; | |
5873 | ||
beeca19c | 5874 | *new = false; |
356a95ec JL |
5875 | spin_lock(&clp->cl_lock); |
5876 | lst = find_lock_stateid(lo, fi); | |
356a95ec | 5877 | spin_unlock(&clp->cl_lock); |
beeca19c TM |
5878 | if (lst != NULL) { |
5879 | if (nfsd4_lock_ol_stateid(lst) == nfs_ok) | |
5880 | goto out; | |
5881 | nfs4_put_stid(&lst->st_stid); | |
5882 | } | |
5883 | ns = nfs4_alloc_stid(clp, stateid_slab, nfs4_free_lock_stateid); | |
5884 | if (ns == NULL) | |
5885 | return NULL; | |
5886 | ||
5887 | lst = init_lock_stateid(openlockstateid(ns), lo, fi, inode, ost); | |
5888 | if (lst == openlockstateid(ns)) | |
5889 | *new = true; | |
5890 | else | |
356a95ec | 5891 | nfs4_put_stid(ns); |
beeca19c | 5892 | out: |
356a95ec JL |
5893 | return lst; |
5894 | } | |
c53530da | 5895 | |
fd39ca9a | 5896 | static int |
1da177e4 LT |
5897 | check_lock_length(u64 offset, u64 length) |
5898 | { | |
e7969315 KM |
5899 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
5900 | (length > ~offset))); | |
1da177e4 LT |
5901 | } |
5902 | ||
dcef0413 | 5903 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 | 5904 | { |
11b9164a | 5905 | struct nfs4_file *fp = lock_stp->st_stid.sc_file; |
0997b173 | 5906 | |
7214e860 JL |
5907 | lockdep_assert_held(&fp->fi_lock); |
5908 | ||
82c5ff1b | 5909 | if (test_access(access, lock_stp)) |
0997b173 | 5910 | return; |
12659651 | 5911 | __nfs4_file_get_access(fp, access); |
82c5ff1b | 5912 | set_access(access, lock_stp); |
0997b173 BF |
5913 | } |
5914 | ||
356a95ec JL |
5915 | static __be32 |
5916 | lookup_or_create_lock_state(struct nfsd4_compound_state *cstate, | |
5917 | struct nfs4_ol_stateid *ost, | |
5918 | struct nfsd4_lock *lock, | |
dd257933 | 5919 | struct nfs4_ol_stateid **plst, bool *new) |
64a284d0 | 5920 | { |
5db1c03f | 5921 | __be32 status; |
11b9164a | 5922 | struct nfs4_file *fi = ost->st_stid.sc_file; |
64a284d0 BF |
5923 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); |
5924 | struct nfs4_client *cl = oo->oo_owner.so_client; | |
2b0143b5 | 5925 | struct inode *inode = d_inode(cstate->current_fh.fh_dentry); |
64a284d0 | 5926 | struct nfs4_lockowner *lo; |
dd257933 | 5927 | struct nfs4_ol_stateid *lst; |
64a284d0 BF |
5928 | unsigned int strhashval; |
5929 | ||
c8623999 | 5930 | lo = find_lockowner_str(cl, &lock->lk_new_owner); |
c53530da | 5931 | if (!lo) { |
76f6c9e1 | 5932 | strhashval = ownerstr_hashval(&lock->lk_new_owner); |
c53530da JL |
5933 | lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); |
5934 | if (lo == NULL) | |
5935 | return nfserr_jukebox; | |
5936 | } else { | |
5937 | /* with an existing lockowner, seqids must be the same */ | |
5db1c03f | 5938 | status = nfserr_bad_seqid; |
c53530da JL |
5939 | if (!cstate->minorversion && |
5940 | lock->lk_new_lock_seqid != lo->lo_owner.so_seqid) | |
5db1c03f | 5941 | goto out; |
64a284d0 | 5942 | } |
c53530da | 5943 | |
dd257933 JL |
5944 | lst = find_or_create_lock_stateid(lo, fi, inode, ost, new); |
5945 | if (lst == NULL) { | |
5db1c03f JL |
5946 | status = nfserr_jukebox; |
5947 | goto out; | |
64a284d0 | 5948 | } |
dd257933 | 5949 | |
5db1c03f | 5950 | status = nfs_ok; |
dd257933 | 5951 | *plst = lst; |
5db1c03f JL |
5952 | out: |
5953 | nfs4_put_stateowner(&lo->lo_owner); | |
5954 | return status; | |
64a284d0 BF |
5955 | } |
5956 | ||
1da177e4 LT |
5957 | /* |
5958 | * LOCK operation | |
5959 | */ | |
b37ad28b | 5960 | __be32 |
ca364317 | 5961 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 5962 | union nfsd4_op_u *u) |
1da177e4 | 5963 | { |
eb69853d | 5964 | struct nfsd4_lock *lock = &u->lock; |
fe0750e5 BF |
5965 | struct nfs4_openowner *open_sop = NULL; |
5966 | struct nfs4_lockowner *lock_sop = NULL; | |
3d0fabd5 | 5967 | struct nfs4_ol_stateid *lock_stp = NULL; |
0667b1e9 | 5968 | struct nfs4_ol_stateid *open_stp = NULL; |
7214e860 | 5969 | struct nfs4_file *fp; |
7d947842 | 5970 | struct file *filp = NULL; |
76d348fa | 5971 | struct nfsd4_blocked_lock *nbl = NULL; |
21179d81 JL |
5972 | struct file_lock *file_lock = NULL; |
5973 | struct file_lock *conflock = NULL; | |
b37ad28b | 5974 | __be32 status = 0; |
b34f27aa | 5975 | int lkflg; |
b8dd7b9a | 5976 | int err; |
5db1c03f | 5977 | bool new = false; |
76d348fa JL |
5978 | unsigned char fl_type; |
5979 | unsigned int fl_flags = FL_POSIX; | |
3320fef1 SK |
5980 | struct net *net = SVC_NET(rqstp); |
5981 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 LT |
5982 | |
5983 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
5984 | (long long) lock->lk_offset, | |
5985 | (long long) lock->lk_length); | |
5986 | ||
1da177e4 LT |
5987 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
5988 | return nfserr_inval; | |
5989 | ||
ca364317 | 5990 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 5991 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
5992 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
5993 | return status; | |
5994 | } | |
5995 | ||
1da177e4 | 5996 | if (lock->lk_is_new) { |
684e5638 BF |
5997 | if (nfsd4_has_session(cstate)) |
5998 | /* See rfc 5661 18.10.3: given clientid is ignored: */ | |
76f6c9e1 | 5999 | memcpy(&lock->lk_new_clientid, |
684e5638 BF |
6000 | &cstate->session->se_client->cl_clientid, |
6001 | sizeof(clientid_t)); | |
6002 | ||
1da177e4 | 6003 | status = nfserr_stale_clientid; |
2c142baa | 6004 | if (STALE_CLIENTID(&lock->lk_new_clientid, nn)) |
1da177e4 | 6005 | goto out; |
1da177e4 | 6006 | |
1da177e4 | 6007 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 6008 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
6009 | lock->lk_new_open_seqid, |
6010 | &lock->lk_new_open_stateid, | |
3320fef1 | 6011 | &open_stp, nn); |
37515177 | 6012 | if (status) |
1da177e4 | 6013 | goto out; |
feb9dad5 | 6014 | mutex_unlock(&open_stp->st_mutex); |
fe0750e5 | 6015 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 6016 | status = nfserr_bad_stateid; |
684e5638 | 6017 | if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
76f6c9e1 | 6018 | &lock->lk_new_clientid)) |
b34f27aa | 6019 | goto out; |
64a284d0 | 6020 | status = lookup_or_create_lock_state(cstate, open_stp, lock, |
5db1c03f | 6021 | &lock_stp, &new); |
3d0fabd5 | 6022 | } else { |
dd453dfd | 6023 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
6024 | lock->lk_old_lock_seqid, |
6025 | &lock->lk_old_lock_stateid, | |
3320fef1 | 6026 | NFS4_LOCK_STID, &lock_stp, nn); |
3d0fabd5 | 6027 | } |
e1aaa891 BF |
6028 | if (status) |
6029 | goto out; | |
64a284d0 | 6030 | lock_sop = lockowner(lock_stp->st_stateowner); |
1da177e4 | 6031 | |
b34f27aa BF |
6032 | lkflg = setlkflg(lock->lk_type); |
6033 | status = nfs4_check_openmode(lock_stp, lkflg); | |
6034 | if (status) | |
6035 | goto out; | |
6036 | ||
0dd395dc | 6037 | status = nfserr_grace; |
3320fef1 | 6038 | if (locks_in_grace(net) && !lock->lk_reclaim) |
0dd395dc N |
6039 | goto out; |
6040 | status = nfserr_no_grace; | |
3320fef1 | 6041 | if (!locks_in_grace(net) && lock->lk_reclaim) |
0dd395dc N |
6042 | goto out; |
6043 | ||
11b9164a | 6044 | fp = lock_stp->st_stid.sc_file; |
1da177e4 | 6045 | switch (lock->lk_type) { |
1da177e4 | 6046 | case NFS4_READW_LT: |
76d348fa JL |
6047 | if (nfsd4_has_session(cstate)) |
6048 | fl_flags |= FL_SLEEP; | |
6049 | /* Fallthrough */ | |
6050 | case NFS4_READ_LT: | |
7214e860 JL |
6051 | spin_lock(&fp->fi_lock); |
6052 | filp = find_readable_file_locked(fp); | |
0997b173 BF |
6053 | if (filp) |
6054 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
7214e860 | 6055 | spin_unlock(&fp->fi_lock); |
76d348fa | 6056 | fl_type = F_RDLCK; |
529d7b2a | 6057 | break; |
1da177e4 | 6058 | case NFS4_WRITEW_LT: |
76d348fa JL |
6059 | if (nfsd4_has_session(cstate)) |
6060 | fl_flags |= FL_SLEEP; | |
6061 | /* Fallthrough */ | |
6062 | case NFS4_WRITE_LT: | |
7214e860 JL |
6063 | spin_lock(&fp->fi_lock); |
6064 | filp = find_writeable_file_locked(fp); | |
0997b173 BF |
6065 | if (filp) |
6066 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
7214e860 | 6067 | spin_unlock(&fp->fi_lock); |
76d348fa | 6068 | fl_type = F_WRLCK; |
529d7b2a | 6069 | break; |
1da177e4 LT |
6070 | default: |
6071 | status = nfserr_inval; | |
6072 | goto out; | |
6073 | } | |
76d348fa | 6074 | |
f9d7562f BF |
6075 | if (!filp) { |
6076 | status = nfserr_openmode; | |
6077 | goto out; | |
6078 | } | |
aef9583b | 6079 | |
76d348fa JL |
6080 | nbl = find_or_allocate_block(lock_sop, &fp->fi_fhandle, nn); |
6081 | if (!nbl) { | |
6082 | dprintk("NFSD: %s: unable to allocate block!\n", __func__); | |
6083 | status = nfserr_jukebox; | |
6084 | goto out; | |
6085 | } | |
6086 | ||
6087 | file_lock = &nbl->nbl_lock; | |
6088 | file_lock->fl_type = fl_type; | |
aef9583b | 6089 | file_lock->fl_owner = (fl_owner_t)lockowner(nfs4_get_stateowner(&lock_sop->lo_owner)); |
21179d81 JL |
6090 | file_lock->fl_pid = current->tgid; |
6091 | file_lock->fl_file = filp; | |
76d348fa | 6092 | file_lock->fl_flags = fl_flags; |
21179d81 JL |
6093 | file_lock->fl_lmops = &nfsd_posix_mng_ops; |
6094 | file_lock->fl_start = lock->lk_offset; | |
6095 | file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); | |
6096 | nfs4_transform_lock_offset(file_lock); | |
6097 | ||
6098 | conflock = locks_alloc_lock(); | |
6099 | if (!conflock) { | |
6100 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
6101 | status = nfserr_jukebox; | |
6102 | goto out; | |
6103 | } | |
1da177e4 | 6104 | |
76d348fa | 6105 | if (fl_flags & FL_SLEEP) { |
7919d0a2 | 6106 | nbl->nbl_time = jiffies; |
0cc11a61 | 6107 | spin_lock(&nn->blocked_locks_lock); |
76d348fa | 6108 | list_add_tail(&nbl->nbl_list, &lock_sop->lo_blocked); |
7919d0a2 | 6109 | list_add_tail(&nbl->nbl_lru, &nn->blocked_locks_lru); |
0cc11a61 | 6110 | spin_unlock(&nn->blocked_locks_lock); |
76d348fa JL |
6111 | } |
6112 | ||
21179d81 | 6113 | err = vfs_lock_file(filp, F_SETLK, file_lock, conflock); |
76d348fa | 6114 | switch (err) { |
1da177e4 | 6115 | case 0: /* success! */ |
9767feb2 | 6116 | nfs4_inc_and_copy_stateid(&lock->lk_resp_stateid, &lock_stp->st_stid); |
b8dd7b9a | 6117 | status = 0; |
03f318ca BF |
6118 | if (lock->lk_reclaim) |
6119 | nn->somebody_reclaimed = true; | |
eb76b3fd | 6120 | break; |
76d348fa JL |
6121 | case FILE_LOCK_DEFERRED: |
6122 | nbl = NULL; | |
6123 | /* Fallthrough */ | |
6124 | case -EAGAIN: /* conflock holds conflicting lock */ | |
eb76b3fd AA |
6125 | status = nfserr_denied; |
6126 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
21179d81 | 6127 | nfs4_set_lock_denied(conflock, &lock->lk_denied); |
eb76b3fd | 6128 | break; |
76d348fa | 6129 | case -EDEADLK: |
1da177e4 | 6130 | status = nfserr_deadlock; |
eb76b3fd | 6131 | break; |
3e772463 | 6132 | default: |
fd85b817 | 6133 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 6134 | status = nfserrno(err); |
eb76b3fd | 6135 | break; |
1da177e4 | 6136 | } |
1da177e4 | 6137 | out: |
76d348fa JL |
6138 | if (nbl) { |
6139 | /* dequeue it if we queued it before */ | |
6140 | if (fl_flags & FL_SLEEP) { | |
0cc11a61 | 6141 | spin_lock(&nn->blocked_locks_lock); |
76d348fa | 6142 | list_del_init(&nbl->nbl_list); |
7919d0a2 | 6143 | list_del_init(&nbl->nbl_lru); |
0cc11a61 | 6144 | spin_unlock(&nn->blocked_locks_lock); |
76d348fa JL |
6145 | } |
6146 | free_blocked_lock(nbl); | |
6147 | } | |
de18643d TM |
6148 | if (filp) |
6149 | fput(filp); | |
5db1c03f JL |
6150 | if (lock_stp) { |
6151 | /* Bump seqid manually if the 4.0 replay owner is openowner */ | |
6152 | if (cstate->replay_owner && | |
6153 | cstate->replay_owner != &lock_sop->lo_owner && | |
6154 | seqid_mutating_err(ntohl(status))) | |
6155 | lock_sop->lo_owner.so_seqid++; | |
6156 | ||
6157 | /* | |
6158 | * If this is a new, never-before-used stateid, and we are | |
6159 | * returning an error, then just go ahead and release it. | |
6160 | */ | |
25020720 | 6161 | if (status && new) |
5db1c03f | 6162 | release_lock_stateid(lock_stp); |
beeca19c TM |
6163 | |
6164 | mutex_unlock(&lock_stp->st_mutex); | |
5db1c03f | 6165 | |
3d0fabd5 | 6166 | nfs4_put_stid(&lock_stp->st_stid); |
5db1c03f | 6167 | } |
0667b1e9 TM |
6168 | if (open_stp) |
6169 | nfs4_put_stid(&open_stp->st_stid); | |
9411b1d4 | 6170 | nfsd4_bump_seqid(cstate, status); |
21179d81 JL |
6171 | if (conflock) |
6172 | locks_free_lock(conflock); | |
1da177e4 LT |
6173 | return status; |
6174 | } | |
6175 | ||
55ef1274 BF |
6176 | /* |
6177 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
6178 | * so we do a temporary open here just to get an open file to pass to | |
6179 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
6180 | * inode operation.) | |
6181 | */ | |
04da6e9d | 6182 | static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) |
55ef1274 BF |
6183 | { |
6184 | struct file *file; | |
04da6e9d AV |
6185 | __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); |
6186 | if (!err) { | |
6187 | err = nfserrno(vfs_test_lock(file, lock)); | |
fd891454 | 6188 | fput(file); |
04da6e9d | 6189 | } |
55ef1274 BF |
6190 | return err; |
6191 | } | |
6192 | ||
1da177e4 LT |
6193 | /* |
6194 | * LOCKT operation | |
6195 | */ | |
b37ad28b | 6196 | __be32 |
ca364317 | 6197 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 6198 | union nfsd4_op_u *u) |
1da177e4 | 6199 | { |
eb69853d | 6200 | struct nfsd4_lockt *lockt = &u->lockt; |
21179d81 | 6201 | struct file_lock *file_lock = NULL; |
5db1c03f | 6202 | struct nfs4_lockowner *lo = NULL; |
b37ad28b | 6203 | __be32 status; |
7f2210fa | 6204 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 6205 | |
5ccb0066 | 6206 | if (locks_in_grace(SVC_NET(rqstp))) |
1da177e4 LT |
6207 | return nfserr_grace; |
6208 | ||
6209 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
6210 | return nfserr_inval; | |
6211 | ||
9b2ef62b | 6212 | if (!nfsd4_has_session(cstate)) { |
4b24ca7d | 6213 | status = lookup_clientid(&lockt->lt_clientid, cstate, nn); |
9b2ef62b BF |
6214 | if (status) |
6215 | goto out; | |
6216 | } | |
1da177e4 | 6217 | |
75c096f7 | 6218 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 6219 | goto out; |
1da177e4 | 6220 | |
21179d81 JL |
6221 | file_lock = locks_alloc_lock(); |
6222 | if (!file_lock) { | |
6223 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
6224 | status = nfserr_jukebox; | |
6225 | goto out; | |
6226 | } | |
6cd90662 | 6227 | |
1da177e4 LT |
6228 | switch (lockt->lt_type) { |
6229 | case NFS4_READ_LT: | |
6230 | case NFS4_READW_LT: | |
21179d81 | 6231 | file_lock->fl_type = F_RDLCK; |
f50c9d79 | 6232 | break; |
1da177e4 LT |
6233 | case NFS4_WRITE_LT: |
6234 | case NFS4_WRITEW_LT: | |
21179d81 | 6235 | file_lock->fl_type = F_WRLCK; |
f50c9d79 | 6236 | break; |
1da177e4 | 6237 | default: |
2fdada03 | 6238 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 | 6239 | status = nfserr_inval; |
f50c9d79 | 6240 | goto out; |
1da177e4 LT |
6241 | } |
6242 | ||
c8623999 | 6243 | lo = find_lockowner_str(cstate->clp, &lockt->lt_owner); |
fe0750e5 | 6244 | if (lo) |
21179d81 JL |
6245 | file_lock->fl_owner = (fl_owner_t)lo; |
6246 | file_lock->fl_pid = current->tgid; | |
6247 | file_lock->fl_flags = FL_POSIX; | |
1da177e4 | 6248 | |
21179d81 JL |
6249 | file_lock->fl_start = lockt->lt_offset; |
6250 | file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); | |
1da177e4 | 6251 | |
21179d81 | 6252 | nfs4_transform_lock_offset(file_lock); |
1da177e4 | 6253 | |
21179d81 | 6254 | status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock); |
04da6e9d | 6255 | if (status) |
fd85b817 | 6256 | goto out; |
04da6e9d | 6257 | |
21179d81 | 6258 | if (file_lock->fl_type != F_UNLCK) { |
1da177e4 | 6259 | status = nfserr_denied; |
21179d81 | 6260 | nfs4_set_lock_denied(file_lock, &lockt->lt_denied); |
1da177e4 LT |
6261 | } |
6262 | out: | |
5db1c03f JL |
6263 | if (lo) |
6264 | nfs4_put_stateowner(&lo->lo_owner); | |
21179d81 JL |
6265 | if (file_lock) |
6266 | locks_free_lock(file_lock); | |
1da177e4 LT |
6267 | return status; |
6268 | } | |
6269 | ||
b37ad28b | 6270 | __be32 |
ca364317 | 6271 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 6272 | union nfsd4_op_u *u) |
1da177e4 | 6273 | { |
eb69853d | 6274 | struct nfsd4_locku *locku = &u->locku; |
dcef0413 | 6275 | struct nfs4_ol_stateid *stp; |
1da177e4 | 6276 | struct file *filp = NULL; |
21179d81 | 6277 | struct file_lock *file_lock = NULL; |
b37ad28b | 6278 | __be32 status; |
b8dd7b9a | 6279 | int err; |
3320fef1 SK |
6280 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
6281 | ||
1da177e4 LT |
6282 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", |
6283 | (long long) locku->lu_offset, | |
6284 | (long long) locku->lu_length); | |
6285 | ||
6286 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
6287 | return nfserr_inval; | |
6288 | ||
9072d5c6 | 6289 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
3320fef1 SK |
6290 | &locku->lu_stateid, NFS4_LOCK_STID, |
6291 | &stp, nn); | |
9072d5c6 | 6292 | if (status) |
1da177e4 | 6293 | goto out; |
11b9164a | 6294 | filp = find_any_file(stp->st_stid.sc_file); |
f9d7562f BF |
6295 | if (!filp) { |
6296 | status = nfserr_lock_range; | |
858cc573 | 6297 | goto put_stateid; |
f9d7562f | 6298 | } |
21179d81 JL |
6299 | file_lock = locks_alloc_lock(); |
6300 | if (!file_lock) { | |
6301 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
6302 | status = nfserr_jukebox; | |
de18643d | 6303 | goto fput; |
21179d81 | 6304 | } |
6cd90662 | 6305 | |
21179d81 | 6306 | file_lock->fl_type = F_UNLCK; |
aef9583b | 6307 | file_lock->fl_owner = (fl_owner_t)lockowner(nfs4_get_stateowner(stp->st_stateowner)); |
21179d81 JL |
6308 | file_lock->fl_pid = current->tgid; |
6309 | file_lock->fl_file = filp; | |
6310 | file_lock->fl_flags = FL_POSIX; | |
6311 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
6312 | file_lock->fl_start = locku->lu_offset; | |
6313 | ||
6314 | file_lock->fl_end = last_byte_offset(locku->lu_offset, | |
6315 | locku->lu_length); | |
6316 | nfs4_transform_lock_offset(file_lock); | |
1da177e4 | 6317 | |
21179d81 | 6318 | err = vfs_lock_file(filp, F_SETLK, file_lock, NULL); |
b8dd7b9a | 6319 | if (err) { |
fd85b817 | 6320 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
6321 | goto out_nfserr; |
6322 | } | |
9767feb2 | 6323 | nfs4_inc_and_copy_stateid(&locku->lu_stateid, &stp->st_stid); |
de18643d TM |
6324 | fput: |
6325 | fput(filp); | |
858cc573 | 6326 | put_stateid: |
feb9dad5 | 6327 | mutex_unlock(&stp->st_mutex); |
858cc573 | 6328 | nfs4_put_stid(&stp->st_stid); |
1da177e4 | 6329 | out: |
9411b1d4 | 6330 | nfsd4_bump_seqid(cstate, status); |
21179d81 JL |
6331 | if (file_lock) |
6332 | locks_free_lock(file_lock); | |
1da177e4 LT |
6333 | return status; |
6334 | ||
6335 | out_nfserr: | |
b8dd7b9a | 6336 | status = nfserrno(err); |
de18643d | 6337 | goto fput; |
1da177e4 LT |
6338 | } |
6339 | ||
6340 | /* | |
6341 | * returns | |
f9c00c3a JL |
6342 | * true: locks held by lockowner |
6343 | * false: no locks held by lockowner | |
1da177e4 | 6344 | */ |
f9c00c3a JL |
6345 | static bool |
6346 | check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner) | |
1da177e4 | 6347 | { |
bd61e0a9 | 6348 | struct file_lock *fl; |
f9c00c3a JL |
6349 | int status = false; |
6350 | struct file *filp = find_any_file(fp); | |
6351 | struct inode *inode; | |
bd61e0a9 | 6352 | struct file_lock_context *flctx; |
f9c00c3a JL |
6353 | |
6354 | if (!filp) { | |
6355 | /* Any valid lock stateid should have some sort of access */ | |
6356 | WARN_ON_ONCE(1); | |
6357 | return status; | |
6358 | } | |
6359 | ||
64bed6cb | 6360 | inode = locks_inode(filp); |
bd61e0a9 JL |
6361 | flctx = inode->i_flctx; |
6362 | ||
6363 | if (flctx && !list_empty_careful(&flctx->flc_posix)) { | |
6109c850 | 6364 | spin_lock(&flctx->flc_lock); |
bd61e0a9 JL |
6365 | list_for_each_entry(fl, &flctx->flc_posix, fl_list) { |
6366 | if (fl->fl_owner == (fl_owner_t)lowner) { | |
6367 | status = true; | |
6368 | break; | |
6369 | } | |
796dadfd | 6370 | } |
6109c850 | 6371 | spin_unlock(&flctx->flc_lock); |
1da177e4 | 6372 | } |
f9c00c3a | 6373 | fput(filp); |
1da177e4 LT |
6374 | return status; |
6375 | } | |
6376 | ||
b37ad28b | 6377 | __be32 |
b591480b BF |
6378 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
6379 | struct nfsd4_compound_state *cstate, | |
eb69853d | 6380 | union nfsd4_op_u *u) |
1da177e4 | 6381 | { |
eb69853d | 6382 | struct nfsd4_release_lockowner *rlockowner = &u->release_lockowner; |
1da177e4 | 6383 | clientid_t *clid = &rlockowner->rl_clientid; |
882e9d25 JL |
6384 | struct nfs4_stateowner *sop; |
6385 | struct nfs4_lockowner *lo = NULL; | |
dcef0413 | 6386 | struct nfs4_ol_stateid *stp; |
1da177e4 | 6387 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
d4f0489f | 6388 | unsigned int hashval = ownerstr_hashval(owner); |
b37ad28b | 6389 | __be32 status; |
7f2210fa | 6390 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
c58c6610 | 6391 | struct nfs4_client *clp; |
88584818 | 6392 | LIST_HEAD (reaplist); |
1da177e4 LT |
6393 | |
6394 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
6395 | clid->cl_boot, clid->cl_id); | |
6396 | ||
4b24ca7d | 6397 | status = lookup_clientid(clid, cstate, nn); |
9b2ef62b | 6398 | if (status) |
51f5e783 | 6399 | return status; |
9b2ef62b | 6400 | |
d4f0489f | 6401 | clp = cstate->clp; |
fd44907c | 6402 | /* Find the matching lock stateowner */ |
d4f0489f | 6403 | spin_lock(&clp->cl_lock); |
882e9d25 | 6404 | list_for_each_entry(sop, &clp->cl_ownerstr_hashtbl[hashval], |
d4f0489f | 6405 | so_strhash) { |
fd44907c | 6406 | |
882e9d25 JL |
6407 | if (sop->so_is_open_owner || !same_owner_str(sop, owner)) |
6408 | continue; | |
fd44907c | 6409 | |
882e9d25 JL |
6410 | /* see if there are still any locks associated with it */ |
6411 | lo = lockowner(sop); | |
6412 | list_for_each_entry(stp, &sop->so_stateids, st_perstateowner) { | |
6413 | if (check_for_locks(stp->st_stid.sc_file, lo)) { | |
6414 | status = nfserr_locks_held; | |
6415 | spin_unlock(&clp->cl_lock); | |
51f5e783 | 6416 | return status; |
882e9d25 | 6417 | } |
5adfd885 | 6418 | } |
882e9d25 | 6419 | |
b5971afa | 6420 | nfs4_get_stateowner(sop); |
882e9d25 | 6421 | break; |
1da177e4 | 6422 | } |
88584818 CL |
6423 | if (!lo) { |
6424 | spin_unlock(&clp->cl_lock); | |
6425 | return status; | |
6426 | } | |
6427 | ||
6428 | unhash_lockowner_locked(lo); | |
6429 | while (!list_empty(&lo->lo_owner.so_stateids)) { | |
6430 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
6431 | struct nfs4_ol_stateid, | |
6432 | st_perstateowner); | |
6433 | WARN_ON(!unhash_lock_stateid(stp)); | |
6434 | put_ol_stateid_locked(stp, &reaplist); | |
6435 | } | |
c58c6610 | 6436 | spin_unlock(&clp->cl_lock); |
88584818 | 6437 | free_ol_stateid_reaplist(&reaplist); |
68ef3bc3 | 6438 | remove_blocked_locks(lo); |
88584818 CL |
6439 | nfs4_put_stateowner(&lo->lo_owner); |
6440 | ||
1da177e4 LT |
6441 | return status; |
6442 | } | |
6443 | ||
6444 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 6445 | alloc_reclaim(void) |
1da177e4 | 6446 | { |
a55370a3 | 6447 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
6448 | } |
6449 | ||
0ce0c2b5 | 6450 | bool |
52e19c09 | 6451 | nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn) |
c7b9a459 | 6452 | { |
0ce0c2b5 | 6453 | struct nfs4_client_reclaim *crp; |
c7b9a459 | 6454 | |
52e19c09 | 6455 | crp = nfsd4_find_reclaim_client(name, nn); |
0ce0c2b5 | 6456 | return (crp && crp->cr_clp); |
c7b9a459 N |
6457 | } |
6458 | ||
1da177e4 LT |
6459 | /* |
6460 | * failure => all reset bets are off, nfserr_no_grace... | |
6461 | */ | |
772a9bbb | 6462 | struct nfs4_client_reclaim * |
52e19c09 | 6463 | nfs4_client_to_reclaim(const char *name, struct nfsd_net *nn) |
1da177e4 LT |
6464 | { |
6465 | unsigned int strhashval; | |
772a9bbb | 6466 | struct nfs4_client_reclaim *crp; |
1da177e4 | 6467 | |
a55370a3 N |
6468 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
6469 | crp = alloc_reclaim(); | |
772a9bbb JL |
6470 | if (crp) { |
6471 | strhashval = clientstr_hashval(name); | |
6472 | INIT_LIST_HEAD(&crp->cr_strhash); | |
52e19c09 | 6473 | list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]); |
772a9bbb | 6474 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
0ce0c2b5 | 6475 | crp->cr_clp = NULL; |
52e19c09 | 6476 | nn->reclaim_str_hashtbl_size++; |
772a9bbb JL |
6477 | } |
6478 | return crp; | |
1da177e4 LT |
6479 | } |
6480 | ||
ce30e539 | 6481 | void |
52e19c09 | 6482 | nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn) |
ce30e539 JL |
6483 | { |
6484 | list_del(&crp->cr_strhash); | |
6485 | kfree(crp); | |
52e19c09 | 6486 | nn->reclaim_str_hashtbl_size--; |
ce30e539 JL |
6487 | } |
6488 | ||
2a4317c5 | 6489 | void |
52e19c09 | 6490 | nfs4_release_reclaim(struct nfsd_net *nn) |
1da177e4 LT |
6491 | { |
6492 | struct nfs4_client_reclaim *crp = NULL; | |
6493 | int i; | |
6494 | ||
1da177e4 | 6495 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
52e19c09 SK |
6496 | while (!list_empty(&nn->reclaim_str_hashtbl[i])) { |
6497 | crp = list_entry(nn->reclaim_str_hashtbl[i].next, | |
1da177e4 | 6498 | struct nfs4_client_reclaim, cr_strhash); |
52e19c09 | 6499 | nfs4_remove_reclaim_record(crp, nn); |
1da177e4 LT |
6500 | } |
6501 | } | |
063b0fb9 | 6502 | WARN_ON_ONCE(nn->reclaim_str_hashtbl_size); |
1da177e4 LT |
6503 | } |
6504 | ||
6505 | /* | |
6506 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
2a4317c5 | 6507 | struct nfs4_client_reclaim * |
52e19c09 | 6508 | nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn) |
1da177e4 LT |
6509 | { |
6510 | unsigned int strhashval; | |
1da177e4 LT |
6511 | struct nfs4_client_reclaim *crp = NULL; |
6512 | ||
278c931c | 6513 | dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir); |
1da177e4 | 6514 | |
278c931c | 6515 | strhashval = clientstr_hashval(recdir); |
52e19c09 | 6516 | list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) { |
278c931c | 6517 | if (same_name(crp->cr_recdir, recdir)) { |
1da177e4 LT |
6518 | return crp; |
6519 | } | |
6520 | } | |
6521 | return NULL; | |
6522 | } | |
6523 | ||
6524 | /* | |
6525 | * Called from OPEN. Look for clientid in reclaim list. | |
6526 | */ | |
b37ad28b | 6527 | __be32 |
0fe492db TM |
6528 | nfs4_check_open_reclaim(clientid_t *clid, |
6529 | struct nfsd4_compound_state *cstate, | |
6530 | struct nfsd_net *nn) | |
1da177e4 | 6531 | { |
0fe492db | 6532 | __be32 status; |
a52d726b JL |
6533 | |
6534 | /* find clientid in conf_id_hashtbl */ | |
0fe492db TM |
6535 | status = lookup_clientid(clid, cstate, nn); |
6536 | if (status) | |
a52d726b JL |
6537 | return nfserr_reclaim_bad; |
6538 | ||
3b3e7b72 JL |
6539 | if (test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, &cstate->clp->cl_flags)) |
6540 | return nfserr_no_grace; | |
6541 | ||
0fe492db TM |
6542 | if (nfsd4_client_record_check(cstate->clp)) |
6543 | return nfserr_reclaim_bad; | |
6544 | ||
6545 | return nfs_ok; | |
1da177e4 LT |
6546 | } |
6547 | ||
65178db4 | 6548 | #ifdef CONFIG_NFSD_FAULT_INJECTION |
016200c3 JL |
6549 | static inline void |
6550 | put_client(struct nfs4_client *clp) | |
6551 | { | |
6552 | atomic_dec(&clp->cl_refcount); | |
6553 | } | |
6554 | ||
285abdee JL |
6555 | static struct nfs4_client * |
6556 | nfsd_find_client(struct sockaddr_storage *addr, size_t addr_size) | |
6557 | { | |
6558 | struct nfs4_client *clp; | |
6559 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6560 | nfsd_net_id); | |
6561 | ||
6562 | if (!nfsd_netns_ready(nn)) | |
6563 | return NULL; | |
6564 | ||
6565 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
6566 | if (memcmp(&clp->cl_addr, addr, addr_size) == 0) | |
6567 | return clp; | |
6568 | } | |
6569 | return NULL; | |
6570 | } | |
6571 | ||
7ec0e36f | 6572 | u64 |
285abdee | 6573 | nfsd_inject_print_clients(void) |
7ec0e36f JL |
6574 | { |
6575 | struct nfs4_client *clp; | |
6576 | u64 count = 0; | |
6577 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6578 | nfsd_net_id); | |
6579 | char buf[INET6_ADDRSTRLEN]; | |
6580 | ||
6581 | if (!nfsd_netns_ready(nn)) | |
6582 | return 0; | |
6583 | ||
6584 | spin_lock(&nn->client_lock); | |
6585 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
6586 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); | |
6587 | pr_info("NFS Client: %s\n", buf); | |
6588 | ++count; | |
6589 | } | |
6590 | spin_unlock(&nn->client_lock); | |
6591 | ||
6592 | return count; | |
6593 | } | |
65178db4 | 6594 | |
a0926d15 | 6595 | u64 |
285abdee | 6596 | nfsd_inject_forget_client(struct sockaddr_storage *addr, size_t addr_size) |
a0926d15 JL |
6597 | { |
6598 | u64 count = 0; | |
6599 | struct nfs4_client *clp; | |
6600 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6601 | nfsd_net_id); | |
6602 | ||
6603 | if (!nfsd_netns_ready(nn)) | |
6604 | return count; | |
6605 | ||
6606 | spin_lock(&nn->client_lock); | |
6607 | clp = nfsd_find_client(addr, addr_size); | |
6608 | if (clp) { | |
6609 | if (mark_client_expired_locked(clp) == nfs_ok) | |
6610 | ++count; | |
6611 | else | |
6612 | clp = NULL; | |
6613 | } | |
6614 | spin_unlock(&nn->client_lock); | |
6615 | ||
6616 | if (clp) | |
6617 | expire_client(clp); | |
6618 | ||
6619 | return count; | |
6620 | } | |
6621 | ||
69fc9edf | 6622 | u64 |
285abdee | 6623 | nfsd_inject_forget_clients(u64 max) |
69fc9edf JL |
6624 | { |
6625 | u64 count = 0; | |
6626 | struct nfs4_client *clp, *next; | |
6627 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6628 | nfsd_net_id); | |
6629 | LIST_HEAD(reaplist); | |
6630 | ||
6631 | if (!nfsd_netns_ready(nn)) | |
6632 | return count; | |
6633 | ||
6634 | spin_lock(&nn->client_lock); | |
6635 | list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { | |
6636 | if (mark_client_expired_locked(clp) == nfs_ok) { | |
6637 | list_add(&clp->cl_lru, &reaplist); | |
6638 | if (max != 0 && ++count >= max) | |
6639 | break; | |
6640 | } | |
6641 | } | |
6642 | spin_unlock(&nn->client_lock); | |
6643 | ||
6644 | list_for_each_entry_safe(clp, next, &reaplist, cl_lru) | |
6645 | expire_client(clp); | |
6646 | ||
6647 | return count; | |
6648 | } | |
6649 | ||
184c1847 BS |
6650 | static void nfsd_print_count(struct nfs4_client *clp, unsigned int count, |
6651 | const char *type) | |
6652 | { | |
6653 | char buf[INET6_ADDRSTRLEN]; | |
0a5c33e2 | 6654 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
184c1847 BS |
6655 | printk(KERN_INFO "NFS Client: %s has %u %s\n", buf, count, type); |
6656 | } | |
6657 | ||
016200c3 JL |
6658 | static void |
6659 | nfsd_inject_add_lock_to_list(struct nfs4_ol_stateid *lst, | |
6660 | struct list_head *collect) | |
6661 | { | |
6662 | struct nfs4_client *clp = lst->st_stid.sc_client; | |
6663 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6664 | nfsd_net_id); | |
6665 | ||
6666 | if (!collect) | |
6667 | return; | |
6668 | ||
6669 | lockdep_assert_held(&nn->client_lock); | |
6670 | atomic_inc(&clp->cl_refcount); | |
6671 | list_add(&lst->st_locks, collect); | |
6672 | } | |
6673 | ||
3c87b9b7 | 6674 | static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max, |
3738d50e | 6675 | struct list_head *collect, |
e8568739 | 6676 | bool (*func)(struct nfs4_ol_stateid *)) |
fc29171f BS |
6677 | { |
6678 | struct nfs4_openowner *oop; | |
fc29171f | 6679 | struct nfs4_ol_stateid *stp, *st_next; |
3c87b9b7 | 6680 | struct nfs4_ol_stateid *lst, *lst_next; |
fc29171f BS |
6681 | u64 count = 0; |
6682 | ||
016200c3 | 6683 | spin_lock(&clp->cl_lock); |
fc29171f | 6684 | list_for_each_entry(oop, &clp->cl_openowners, oo_perclient) { |
3c87b9b7 TM |
6685 | list_for_each_entry_safe(stp, st_next, |
6686 | &oop->oo_owner.so_stateids, st_perstateowner) { | |
6687 | list_for_each_entry_safe(lst, lst_next, | |
6688 | &stp->st_locks, st_locks) { | |
3738d50e | 6689 | if (func) { |
e8568739 JL |
6690 | if (func(lst)) |
6691 | nfsd_inject_add_lock_to_list(lst, | |
6692 | collect); | |
3738d50e | 6693 | } |
016200c3 JL |
6694 | ++count; |
6695 | /* | |
6696 | * Despite the fact that these functions deal | |
6697 | * with 64-bit integers for "count", we must | |
6698 | * ensure that it doesn't blow up the | |
6699 | * clp->cl_refcount. Throw a warning if we | |
6700 | * start to approach INT_MAX here. | |
6701 | */ | |
6702 | WARN_ON_ONCE(count == (INT_MAX / 2)); | |
6703 | if (count == max) | |
6704 | goto out; | |
fc29171f BS |
6705 | } |
6706 | } | |
6707 | } | |
016200c3 JL |
6708 | out: |
6709 | spin_unlock(&clp->cl_lock); | |
fc29171f BS |
6710 | |
6711 | return count; | |
6712 | } | |
6713 | ||
016200c3 JL |
6714 | static u64 |
6715 | nfsd_collect_client_locks(struct nfs4_client *clp, struct list_head *collect, | |
6716 | u64 max) | |
fc29171f | 6717 | { |
016200c3 | 6718 | return nfsd_foreach_client_lock(clp, max, collect, unhash_lock_stateid); |
fc29171f BS |
6719 | } |
6720 | ||
016200c3 JL |
6721 | static u64 |
6722 | nfsd_print_client_locks(struct nfs4_client *clp) | |
184c1847 | 6723 | { |
016200c3 | 6724 | u64 count = nfsd_foreach_client_lock(clp, 0, NULL, NULL); |
184c1847 BS |
6725 | nfsd_print_count(clp, count, "locked files"); |
6726 | return count; | |
6727 | } | |
6728 | ||
016200c3 | 6729 | u64 |
285abdee | 6730 | nfsd_inject_print_locks(void) |
016200c3 JL |
6731 | { |
6732 | struct nfs4_client *clp; | |
6733 | u64 count = 0; | |
6734 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6735 | nfsd_net_id); | |
6736 | ||
6737 | if (!nfsd_netns_ready(nn)) | |
6738 | return 0; | |
6739 | ||
6740 | spin_lock(&nn->client_lock); | |
6741 | list_for_each_entry(clp, &nn->client_lru, cl_lru) | |
6742 | count += nfsd_print_client_locks(clp); | |
6743 | spin_unlock(&nn->client_lock); | |
6744 | ||
6745 | return count; | |
6746 | } | |
6747 | ||
6748 | static void | |
6749 | nfsd_reap_locks(struct list_head *reaplist) | |
6750 | { | |
6751 | struct nfs4_client *clp; | |
6752 | struct nfs4_ol_stateid *stp, *next; | |
6753 | ||
6754 | list_for_each_entry_safe(stp, next, reaplist, st_locks) { | |
6755 | list_del_init(&stp->st_locks); | |
6756 | clp = stp->st_stid.sc_client; | |
6757 | nfs4_put_stid(&stp->st_stid); | |
6758 | put_client(clp); | |
6759 | } | |
6760 | } | |
6761 | ||
6762 | u64 | |
285abdee | 6763 | nfsd_inject_forget_client_locks(struct sockaddr_storage *addr, size_t addr_size) |
016200c3 JL |
6764 | { |
6765 | unsigned int count = 0; | |
6766 | struct nfs4_client *clp; | |
6767 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6768 | nfsd_net_id); | |
6769 | LIST_HEAD(reaplist); | |
6770 | ||
6771 | if (!nfsd_netns_ready(nn)) | |
6772 | return count; | |
6773 | ||
6774 | spin_lock(&nn->client_lock); | |
6775 | clp = nfsd_find_client(addr, addr_size); | |
6776 | if (clp) | |
6777 | count = nfsd_collect_client_locks(clp, &reaplist, 0); | |
6778 | spin_unlock(&nn->client_lock); | |
6779 | nfsd_reap_locks(&reaplist); | |
6780 | return count; | |
6781 | } | |
6782 | ||
6783 | u64 | |
285abdee | 6784 | nfsd_inject_forget_locks(u64 max) |
016200c3 JL |
6785 | { |
6786 | u64 count = 0; | |
6787 | struct nfs4_client *clp; | |
6788 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6789 | nfsd_net_id); | |
6790 | LIST_HEAD(reaplist); | |
6791 | ||
6792 | if (!nfsd_netns_ready(nn)) | |
6793 | return count; | |
6794 | ||
6795 | spin_lock(&nn->client_lock); | |
6796 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
6797 | count += nfsd_collect_client_locks(clp, &reaplist, max - count); | |
6798 | if (max != 0 && count >= max) | |
6799 | break; | |
6800 | } | |
6801 | spin_unlock(&nn->client_lock); | |
6802 | nfsd_reap_locks(&reaplist); | |
6803 | return count; | |
6804 | } | |
6805 | ||
82e05efa JL |
6806 | static u64 |
6807 | nfsd_foreach_client_openowner(struct nfs4_client *clp, u64 max, | |
6808 | struct list_head *collect, | |
6809 | void (*func)(struct nfs4_openowner *)) | |
4dbdbda8 BS |
6810 | { |
6811 | struct nfs4_openowner *oop, *next; | |
82e05efa JL |
6812 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, |
6813 | nfsd_net_id); | |
4dbdbda8 BS |
6814 | u64 count = 0; |
6815 | ||
82e05efa JL |
6816 | lockdep_assert_held(&nn->client_lock); |
6817 | ||
6818 | spin_lock(&clp->cl_lock); | |
4dbdbda8 | 6819 | list_for_each_entry_safe(oop, next, &clp->cl_openowners, oo_perclient) { |
82e05efa | 6820 | if (func) { |
4dbdbda8 | 6821 | func(oop); |
82e05efa JL |
6822 | if (collect) { |
6823 | atomic_inc(&clp->cl_refcount); | |
6824 | list_add(&oop->oo_perclient, collect); | |
6825 | } | |
6826 | } | |
6827 | ++count; | |
6828 | /* | |
6829 | * Despite the fact that these functions deal with | |
6830 | * 64-bit integers for "count", we must ensure that | |
6831 | * it doesn't blow up the clp->cl_refcount. Throw a | |
6832 | * warning if we start to approach INT_MAX here. | |
6833 | */ | |
6834 | WARN_ON_ONCE(count == (INT_MAX / 2)); | |
6835 | if (count == max) | |
4dbdbda8 BS |
6836 | break; |
6837 | } | |
82e05efa JL |
6838 | spin_unlock(&clp->cl_lock); |
6839 | ||
6840 | return count; | |
6841 | } | |
6842 | ||
6843 | static u64 | |
6844 | nfsd_print_client_openowners(struct nfs4_client *clp) | |
6845 | { | |
6846 | u64 count = nfsd_foreach_client_openowner(clp, 0, NULL, NULL); | |
6847 | ||
6848 | nfsd_print_count(clp, count, "openowners"); | |
6849 | return count; | |
6850 | } | |
6851 | ||
6852 | static u64 | |
6853 | nfsd_collect_client_openowners(struct nfs4_client *clp, | |
6854 | struct list_head *collect, u64 max) | |
6855 | { | |
6856 | return nfsd_foreach_client_openowner(clp, max, collect, | |
6857 | unhash_openowner_locked); | |
6858 | } | |
6859 | ||
6860 | u64 | |
285abdee | 6861 | nfsd_inject_print_openowners(void) |
82e05efa JL |
6862 | { |
6863 | struct nfs4_client *clp; | |
6864 | u64 count = 0; | |
6865 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6866 | nfsd_net_id); | |
6867 | ||
6868 | if (!nfsd_netns_ready(nn)) | |
6869 | return 0; | |
6870 | ||
6871 | spin_lock(&nn->client_lock); | |
6872 | list_for_each_entry(clp, &nn->client_lru, cl_lru) | |
6873 | count += nfsd_print_client_openowners(clp); | |
6874 | spin_unlock(&nn->client_lock); | |
4dbdbda8 BS |
6875 | |
6876 | return count; | |
6877 | } | |
6878 | ||
82e05efa JL |
6879 | static void |
6880 | nfsd_reap_openowners(struct list_head *reaplist) | |
6881 | { | |
6882 | struct nfs4_client *clp; | |
6883 | struct nfs4_openowner *oop, *next; | |
6884 | ||
6885 | list_for_each_entry_safe(oop, next, reaplist, oo_perclient) { | |
6886 | list_del_init(&oop->oo_perclient); | |
6887 | clp = oop->oo_owner.so_client; | |
6888 | release_openowner(oop); | |
6889 | put_client(clp); | |
6890 | } | |
6891 | } | |
6892 | ||
6893 | u64 | |
285abdee JL |
6894 | nfsd_inject_forget_client_openowners(struct sockaddr_storage *addr, |
6895 | size_t addr_size) | |
4dbdbda8 | 6896 | { |
82e05efa JL |
6897 | unsigned int count = 0; |
6898 | struct nfs4_client *clp; | |
6899 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6900 | nfsd_net_id); | |
6901 | LIST_HEAD(reaplist); | |
6902 | ||
6903 | if (!nfsd_netns_ready(nn)) | |
6904 | return count; | |
6905 | ||
6906 | spin_lock(&nn->client_lock); | |
6907 | clp = nfsd_find_client(addr, addr_size); | |
6908 | if (clp) | |
6909 | count = nfsd_collect_client_openowners(clp, &reaplist, 0); | |
6910 | spin_unlock(&nn->client_lock); | |
6911 | nfsd_reap_openowners(&reaplist); | |
6912 | return count; | |
4dbdbda8 BS |
6913 | } |
6914 | ||
82e05efa | 6915 | u64 |
285abdee | 6916 | nfsd_inject_forget_openowners(u64 max) |
184c1847 | 6917 | { |
82e05efa JL |
6918 | u64 count = 0; |
6919 | struct nfs4_client *clp; | |
6920 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6921 | nfsd_net_id); | |
6922 | LIST_HEAD(reaplist); | |
6923 | ||
6924 | if (!nfsd_netns_ready(nn)) | |
6925 | return count; | |
6926 | ||
6927 | spin_lock(&nn->client_lock); | |
6928 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
6929 | count += nfsd_collect_client_openowners(clp, &reaplist, | |
6930 | max - count); | |
6931 | if (max != 0 && count >= max) | |
6932 | break; | |
6933 | } | |
6934 | spin_unlock(&nn->client_lock); | |
6935 | nfsd_reap_openowners(&reaplist); | |
184c1847 BS |
6936 | return count; |
6937 | } | |
6938 | ||
269de30f BS |
6939 | static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max, |
6940 | struct list_head *victims) | |
6941 | { | |
6942 | struct nfs4_delegation *dp, *next; | |
98d5c7c5 JL |
6943 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, |
6944 | nfsd_net_id); | |
269de30f BS |
6945 | u64 count = 0; |
6946 | ||
98d5c7c5 JL |
6947 | lockdep_assert_held(&nn->client_lock); |
6948 | ||
6949 | spin_lock(&state_lock); | |
269de30f | 6950 | list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) { |
dff1399f JL |
6951 | if (victims) { |
6952 | /* | |
6953 | * It's not safe to mess with delegations that have a | |
6954 | * non-zero dl_time. They might have already been broken | |
6955 | * and could be processed by the laundromat outside of | |
6956 | * the state_lock. Just leave them be. | |
6957 | */ | |
6958 | if (dp->dl_time != 0) | |
6959 | continue; | |
6960 | ||
98d5c7c5 | 6961 | atomic_inc(&clp->cl_refcount); |
3fcbbd24 | 6962 | WARN_ON(!unhash_delegation_locked(dp)); |
42690676 | 6963 | list_add(&dp->dl_recall_lru, victims); |
dff1399f | 6964 | } |
98d5c7c5 JL |
6965 | ++count; |
6966 | /* | |
6967 | * Despite the fact that these functions deal with | |
6968 | * 64-bit integers for "count", we must ensure that | |
6969 | * it doesn't blow up the clp->cl_refcount. Throw a | |
6970 | * warning if we start to approach INT_MAX here. | |
6971 | */ | |
6972 | WARN_ON_ONCE(count == (INT_MAX / 2)); | |
6973 | if (count == max) | |
269de30f BS |
6974 | break; |
6975 | } | |
98d5c7c5 | 6976 | spin_unlock(&state_lock); |
269de30f BS |
6977 | return count; |
6978 | } | |
6979 | ||
98d5c7c5 JL |
6980 | static u64 |
6981 | nfsd_print_client_delegations(struct nfs4_client *clp) | |
269de30f | 6982 | { |
98d5c7c5 | 6983 | u64 count = nfsd_find_all_delegations(clp, 0, NULL); |
269de30f | 6984 | |
98d5c7c5 JL |
6985 | nfsd_print_count(clp, count, "delegations"); |
6986 | return count; | |
6987 | } | |
6988 | ||
6989 | u64 | |
285abdee | 6990 | nfsd_inject_print_delegations(void) |
98d5c7c5 JL |
6991 | { |
6992 | struct nfs4_client *clp; | |
6993 | u64 count = 0; | |
6994 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6995 | nfsd_net_id); | |
6996 | ||
6997 | if (!nfsd_netns_ready(nn)) | |
6998 | return 0; | |
269de30f | 6999 | |
98d5c7c5 JL |
7000 | spin_lock(&nn->client_lock); |
7001 | list_for_each_entry(clp, &nn->client_lru, cl_lru) | |
7002 | count += nfsd_print_client_delegations(clp); | |
7003 | spin_unlock(&nn->client_lock); | |
7004 | ||
7005 | return count; | |
7006 | } | |
7007 | ||
7008 | static void | |
7009 | nfsd_forget_delegations(struct list_head *reaplist) | |
7010 | { | |
7011 | struct nfs4_client *clp; | |
7012 | struct nfs4_delegation *dp, *next; | |
7013 | ||
7014 | list_for_each_entry_safe(dp, next, reaplist, dl_recall_lru) { | |
2d4a532d | 7015 | list_del_init(&dp->dl_recall_lru); |
98d5c7c5 | 7016 | clp = dp->dl_stid.sc_client; |
3bd64a5b | 7017 | revoke_delegation(dp); |
98d5c7c5 | 7018 | put_client(clp); |
2d4a532d | 7019 | } |
98d5c7c5 JL |
7020 | } |
7021 | ||
7022 | u64 | |
285abdee JL |
7023 | nfsd_inject_forget_client_delegations(struct sockaddr_storage *addr, |
7024 | size_t addr_size) | |
98d5c7c5 JL |
7025 | { |
7026 | u64 count = 0; | |
7027 | struct nfs4_client *clp; | |
7028 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
7029 | nfsd_net_id); | |
7030 | LIST_HEAD(reaplist); | |
7031 | ||
7032 | if (!nfsd_netns_ready(nn)) | |
7033 | return count; | |
7034 | ||
7035 | spin_lock(&nn->client_lock); | |
7036 | clp = nfsd_find_client(addr, addr_size); | |
7037 | if (clp) | |
7038 | count = nfsd_find_all_delegations(clp, 0, &reaplist); | |
7039 | spin_unlock(&nn->client_lock); | |
7040 | ||
7041 | nfsd_forget_delegations(&reaplist); | |
7042 | return count; | |
7043 | } | |
269de30f | 7044 | |
98d5c7c5 | 7045 | u64 |
285abdee | 7046 | nfsd_inject_forget_delegations(u64 max) |
98d5c7c5 JL |
7047 | { |
7048 | u64 count = 0; | |
7049 | struct nfs4_client *clp; | |
7050 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
7051 | nfsd_net_id); | |
7052 | LIST_HEAD(reaplist); | |
7053 | ||
7054 | if (!nfsd_netns_ready(nn)) | |
7055 | return count; | |
7056 | ||
7057 | spin_lock(&nn->client_lock); | |
7058 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
7059 | count += nfsd_find_all_delegations(clp, max - count, &reaplist); | |
7060 | if (max != 0 && count >= max) | |
7061 | break; | |
7062 | } | |
7063 | spin_unlock(&nn->client_lock); | |
7064 | nfsd_forget_delegations(&reaplist); | |
269de30f BS |
7065 | return count; |
7066 | } | |
7067 | ||
98d5c7c5 JL |
7068 | static void |
7069 | nfsd_recall_delegations(struct list_head *reaplist) | |
269de30f | 7070 | { |
98d5c7c5 JL |
7071 | struct nfs4_client *clp; |
7072 | struct nfs4_delegation *dp, *next; | |
269de30f | 7073 | |
98d5c7c5 | 7074 | list_for_each_entry_safe(dp, next, reaplist, dl_recall_lru) { |
dff1399f | 7075 | list_del_init(&dp->dl_recall_lru); |
98d5c7c5 JL |
7076 | clp = dp->dl_stid.sc_client; |
7077 | /* | |
7078 | * We skipped all entries that had a zero dl_time before, | |
7079 | * so we can now reset the dl_time back to 0. If a delegation | |
7080 | * break comes in now, then it won't make any difference since | |
7081 | * we're recalling it either way. | |
7082 | */ | |
7083 | spin_lock(&state_lock); | |
dff1399f | 7084 | dp->dl_time = 0; |
98d5c7c5 | 7085 | spin_unlock(&state_lock); |
269de30f | 7086 | nfsd_break_one_deleg(dp); |
98d5c7c5 | 7087 | put_client(clp); |
dff1399f | 7088 | } |
98d5c7c5 | 7089 | } |
269de30f | 7090 | |
98d5c7c5 | 7091 | u64 |
285abdee | 7092 | nfsd_inject_recall_client_delegations(struct sockaddr_storage *addr, |
98d5c7c5 JL |
7093 | size_t addr_size) |
7094 | { | |
7095 | u64 count = 0; | |
7096 | struct nfs4_client *clp; | |
7097 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
7098 | nfsd_net_id); | |
7099 | LIST_HEAD(reaplist); | |
7100 | ||
7101 | if (!nfsd_netns_ready(nn)) | |
7102 | return count; | |
7103 | ||
7104 | spin_lock(&nn->client_lock); | |
7105 | clp = nfsd_find_client(addr, addr_size); | |
7106 | if (clp) | |
7107 | count = nfsd_find_all_delegations(clp, 0, &reaplist); | |
7108 | spin_unlock(&nn->client_lock); | |
7109 | ||
7110 | nfsd_recall_delegations(&reaplist); | |
269de30f BS |
7111 | return count; |
7112 | } | |
7113 | ||
98d5c7c5 | 7114 | u64 |
285abdee | 7115 | nfsd_inject_recall_delegations(u64 max) |
184c1847 BS |
7116 | { |
7117 | u64 count = 0; | |
98d5c7c5 JL |
7118 | struct nfs4_client *clp, *next; |
7119 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
7120 | nfsd_net_id); | |
7121 | LIST_HEAD(reaplist); | |
184c1847 | 7122 | |
98d5c7c5 JL |
7123 | if (!nfsd_netns_ready(nn)) |
7124 | return count; | |
184c1847 | 7125 | |
98d5c7c5 JL |
7126 | spin_lock(&nn->client_lock); |
7127 | list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { | |
7128 | count += nfsd_find_all_delegations(clp, max - count, &reaplist); | |
7129 | if (max != 0 && ++count >= max) | |
7130 | break; | |
7131 | } | |
7132 | spin_unlock(&nn->client_lock); | |
7133 | nfsd_recall_delegations(&reaplist); | |
184c1847 BS |
7134 | return count; |
7135 | } | |
65178db4 BS |
7136 | #endif /* CONFIG_NFSD_FAULT_INJECTION */ |
7137 | ||
c2f1a551 MS |
7138 | /* |
7139 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
7140 | * client may quite reasonably hang on to a delegation as long as it has | |
7141 | * the inode cached. This becomes an obvious problem the first time a | |
7142 | * client's inode cache approaches the size of the server's total memory. | |
7143 | * | |
7144 | * For now we avoid this problem by imposing a hard limit on the number | |
7145 | * of delegations, which varies according to the server's memory size. | |
7146 | */ | |
7147 | static void | |
7148 | set_max_delegations(void) | |
7149 | { | |
7150 | /* | |
7151 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
7152 | * estimates suggest that in the worst case (where every delegation | |
7153 | * is for a different inode), a delegation could take about 1.5K, | |
7154 | * giving a worst case usage of about 6% of memory. | |
7155 | */ | |
7156 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
7157 | } | |
7158 | ||
d85ed443 | 7159 | static int nfs4_state_create_net(struct net *net) |
8daae4dc SK |
7160 | { |
7161 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
7162 | int i; | |
7163 | ||
6da2ec56 KC |
7164 | nn->conf_id_hashtbl = kmalloc_array(CLIENT_HASH_SIZE, |
7165 | sizeof(struct list_head), | |
7166 | GFP_KERNEL); | |
8daae4dc | 7167 | if (!nn->conf_id_hashtbl) |
382a62e7 | 7168 | goto err; |
6da2ec56 KC |
7169 | nn->unconf_id_hashtbl = kmalloc_array(CLIENT_HASH_SIZE, |
7170 | sizeof(struct list_head), | |
7171 | GFP_KERNEL); | |
0a7ec377 SK |
7172 | if (!nn->unconf_id_hashtbl) |
7173 | goto err_unconf_id; | |
6da2ec56 KC |
7174 | nn->sessionid_hashtbl = kmalloc_array(SESSION_HASH_SIZE, |
7175 | sizeof(struct list_head), | |
7176 | GFP_KERNEL); | |
1872de0e SK |
7177 | if (!nn->sessionid_hashtbl) |
7178 | goto err_sessionid; | |
8daae4dc | 7179 | |
382a62e7 | 7180 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
8daae4dc | 7181 | INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]); |
0a7ec377 | 7182 | INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]); |
382a62e7 | 7183 | } |
1872de0e SK |
7184 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
7185 | INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]); | |
382a62e7 | 7186 | nn->conf_name_tree = RB_ROOT; |
a99454aa | 7187 | nn->unconf_name_tree = RB_ROOT; |
81833de1 VA |
7188 | nn->boot_time = get_seconds(); |
7189 | nn->grace_ended = false; | |
7190 | nn->nfsd4_manager.block_opens = true; | |
7191 | INIT_LIST_HEAD(&nn->nfsd4_manager.list); | |
5ed58bb2 | 7192 | INIT_LIST_HEAD(&nn->client_lru); |
73758fed | 7193 | INIT_LIST_HEAD(&nn->close_lru); |
e8c69d17 | 7194 | INIT_LIST_HEAD(&nn->del_recall_lru); |
c9a49628 | 7195 | spin_lock_init(&nn->client_lock); |
e0639dc5 OK |
7196 | spin_lock_init(&nn->s2s_cp_lock); |
7197 | idr_init(&nn->s2s_cp_stateids); | |
8daae4dc | 7198 | |
0cc11a61 JL |
7199 | spin_lock_init(&nn->blocked_locks_lock); |
7200 | INIT_LIST_HEAD(&nn->blocked_locks_lru); | |
7201 | ||
09121281 | 7202 | INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main); |
d85ed443 | 7203 | get_net(net); |
09121281 | 7204 | |
8daae4dc | 7205 | return 0; |
382a62e7 | 7206 | |
1872de0e | 7207 | err_sessionid: |
9b531137 | 7208 | kfree(nn->unconf_id_hashtbl); |
0a7ec377 SK |
7209 | err_unconf_id: |
7210 | kfree(nn->conf_id_hashtbl); | |
382a62e7 SK |
7211 | err: |
7212 | return -ENOMEM; | |
8daae4dc SK |
7213 | } |
7214 | ||
7215 | static void | |
4dce0ac9 | 7216 | nfs4_state_destroy_net(struct net *net) |
8daae4dc SK |
7217 | { |
7218 | int i; | |
7219 | struct nfs4_client *clp = NULL; | |
7220 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
7221 | ||
7222 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { | |
7223 | while (!list_empty(&nn->conf_id_hashtbl[i])) { | |
7224 | clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
7225 | destroy_client(clp); | |
7226 | } | |
7227 | } | |
a99454aa | 7228 | |
68ef3bc3 JL |
7229 | WARN_ON(!list_empty(&nn->blocked_locks_lru)); |
7230 | ||
2b905635 KM |
7231 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
7232 | while (!list_empty(&nn->unconf_id_hashtbl[i])) { | |
7233 | clp = list_entry(nn->unconf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
7234 | destroy_client(clp); | |
7235 | } | |
a99454aa SK |
7236 | } |
7237 | ||
1872de0e | 7238 | kfree(nn->sessionid_hashtbl); |
0a7ec377 | 7239 | kfree(nn->unconf_id_hashtbl); |
8daae4dc | 7240 | kfree(nn->conf_id_hashtbl); |
4dce0ac9 | 7241 | put_net(net); |
8daae4dc SK |
7242 | } |
7243 | ||
f252bc68 | 7244 | int |
d85ed443 | 7245 | nfs4_state_start_net(struct net *net) |
ac4d8ff2 | 7246 | { |
5e1533c7 | 7247 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b5a1a81e BF |
7248 | int ret; |
7249 | ||
d85ed443 | 7250 | ret = nfs4_state_create_net(net); |
8daae4dc SK |
7251 | if (ret) |
7252 | return ret; | |
d4318acd JL |
7253 | locks_start_grace(net, &nn->nfsd4_manager); |
7254 | nfsd4_client_tracking_init(net); | |
7e981a8a VA |
7255 | printk(KERN_INFO "NFSD: starting %ld-second grace period (net %x)\n", |
7256 | nn->nfsd4_grace, net->ns.inum); | |
5284b44e | 7257 | queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ); |
d85ed443 SK |
7258 | return 0; |
7259 | } | |
7260 | ||
7261 | /* initialization to perform when the nfsd service is started: */ | |
7262 | ||
7263 | int | |
7264 | nfs4_state_start(void) | |
7265 | { | |
7266 | int ret; | |
7267 | ||
51a54568 | 7268 | laundry_wq = alloc_workqueue("%s", WQ_UNBOUND, 0, "nfsd4"); |
a6d6b781 JL |
7269 | if (laundry_wq == NULL) { |
7270 | ret = -ENOMEM; | |
a26dd64f | 7271 | goto out; |
a6d6b781 | 7272 | } |
b5a1a81e BF |
7273 | ret = nfsd4_create_callback_queue(); |
7274 | if (ret) | |
7275 | goto out_free_laundry; | |
09121281 | 7276 | |
c2f1a551 | 7277 | set_max_delegations(); |
b5a1a81e | 7278 | return 0; |
d85ed443 | 7279 | |
b5a1a81e BF |
7280 | out_free_laundry: |
7281 | destroy_workqueue(laundry_wq); | |
a26dd64f | 7282 | out: |
b5a1a81e | 7283 | return ret; |
1da177e4 LT |
7284 | } |
7285 | ||
f252bc68 | 7286 | void |
4dce0ac9 | 7287 | nfs4_state_shutdown_net(struct net *net) |
1da177e4 | 7288 | { |
1da177e4 | 7289 | struct nfs4_delegation *dp = NULL; |
1da177e4 | 7290 | struct list_head *pos, *next, reaplist; |
4dce0ac9 | 7291 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
1da177e4 | 7292 | |
4dce0ac9 SK |
7293 | cancel_delayed_work_sync(&nn->laundromat_work); |
7294 | locks_end_grace(&nn->nfsd4_manager); | |
ac55fdc4 | 7295 | |
1da177e4 | 7296 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 7297 | spin_lock(&state_lock); |
e8c69d17 | 7298 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 | 7299 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
3fcbbd24 | 7300 | WARN_ON(!unhash_delegation_locked(dp)); |
42690676 | 7301 | list_add(&dp->dl_recall_lru, &reaplist); |
1da177e4 | 7302 | } |
cdc97505 | 7303 | spin_unlock(&state_lock); |
1da177e4 LT |
7304 | list_for_each_safe(pos, next, &reaplist) { |
7305 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
42690676 | 7306 | list_del_init(&dp->dl_recall_lru); |
0af6e690 | 7307 | destroy_unhashed_deleg(dp); |
1da177e4 LT |
7308 | } |
7309 | ||
3320fef1 | 7310 | nfsd4_client_tracking_exit(net); |
4dce0ac9 | 7311 | nfs4_state_destroy_net(net); |
1da177e4 LT |
7312 | } |
7313 | ||
7314 | void | |
7315 | nfs4_state_shutdown(void) | |
7316 | { | |
5e8d5c29 | 7317 | destroy_workqueue(laundry_wq); |
c3935e30 | 7318 | nfsd4_destroy_callback_queue(); |
1da177e4 | 7319 | } |
8b70484c TM |
7320 | |
7321 | static void | |
7322 | get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
7323 | { | |
37c593c5 TM |
7324 | if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) |
7325 | memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); | |
8b70484c TM |
7326 | } |
7327 | ||
7328 | static void | |
7329 | put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
7330 | { | |
37c593c5 TM |
7331 | if (cstate->minorversion) { |
7332 | memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); | |
7333 | SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
7334 | } | |
7335 | } | |
7336 | ||
7337 | void | |
7338 | clear_current_stateid(struct nfsd4_compound_state *cstate) | |
7339 | { | |
7340 | CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
8b70484c TM |
7341 | } |
7342 | ||
62cd4a59 TM |
7343 | /* |
7344 | * functions to set current state id | |
7345 | */ | |
9428fe1a | 7346 | void |
b60e9859 CH |
7347 | nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, |
7348 | union nfsd4_op_u *u) | |
9428fe1a | 7349 | { |
b60e9859 | 7350 | put_stateid(cstate, &u->open_downgrade.od_stateid); |
9428fe1a TM |
7351 | } |
7352 | ||
8b70484c | 7353 | void |
b60e9859 CH |
7354 | nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, |
7355 | union nfsd4_op_u *u) | |
8b70484c | 7356 | { |
b60e9859 | 7357 | put_stateid(cstate, &u->open.op_stateid); |
8b70484c TM |
7358 | } |
7359 | ||
62cd4a59 | 7360 | void |
b60e9859 CH |
7361 | nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, |
7362 | union nfsd4_op_u *u) | |
62cd4a59 | 7363 | { |
b60e9859 | 7364 | put_stateid(cstate, &u->close.cl_stateid); |
62cd4a59 TM |
7365 | } |
7366 | ||
7367 | void | |
b60e9859 CH |
7368 | nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, |
7369 | union nfsd4_op_u *u) | |
62cd4a59 | 7370 | { |
b60e9859 | 7371 | put_stateid(cstate, &u->lock.lk_resp_stateid); |
62cd4a59 TM |
7372 | } |
7373 | ||
7374 | /* | |
7375 | * functions to consume current state id | |
7376 | */ | |
1e97b519 | 7377 | |
9428fe1a | 7378 | void |
57832e7b CH |
7379 | nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, |
7380 | union nfsd4_op_u *u) | |
9428fe1a | 7381 | { |
57832e7b | 7382 | get_stateid(cstate, &u->open_downgrade.od_stateid); |
9428fe1a TM |
7383 | } |
7384 | ||
7385 | void | |
57832e7b CH |
7386 | nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, |
7387 | union nfsd4_op_u *u) | |
9428fe1a | 7388 | { |
57832e7b | 7389 | get_stateid(cstate, &u->delegreturn.dr_stateid); |
9428fe1a TM |
7390 | } |
7391 | ||
1e97b519 | 7392 | void |
57832e7b CH |
7393 | nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, |
7394 | union nfsd4_op_u *u) | |
1e97b519 | 7395 | { |
57832e7b | 7396 | get_stateid(cstate, &u->free_stateid.fr_stateid); |
1e97b519 TM |
7397 | } |
7398 | ||
7399 | void | |
57832e7b CH |
7400 | nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, |
7401 | union nfsd4_op_u *u) | |
1e97b519 | 7402 | { |
57832e7b | 7403 | get_stateid(cstate, &u->setattr.sa_stateid); |
1e97b519 TM |
7404 | } |
7405 | ||
8b70484c | 7406 | void |
57832e7b CH |
7407 | nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, |
7408 | union nfsd4_op_u *u) | |
8b70484c | 7409 | { |
57832e7b | 7410 | get_stateid(cstate, &u->close.cl_stateid); |
8b70484c TM |
7411 | } |
7412 | ||
7413 | void | |
57832e7b CH |
7414 | nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, |
7415 | union nfsd4_op_u *u) | |
8b70484c | 7416 | { |
57832e7b | 7417 | get_stateid(cstate, &u->locku.lu_stateid); |
8b70484c | 7418 | } |
30813e27 TM |
7419 | |
7420 | void | |
57832e7b CH |
7421 | nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, |
7422 | union nfsd4_op_u *u) | |
30813e27 | 7423 | { |
57832e7b | 7424 | get_stateid(cstate, &u->read.rd_stateid); |
30813e27 TM |
7425 | } |
7426 | ||
7427 | void | |
57832e7b CH |
7428 | nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, |
7429 | union nfsd4_op_u *u) | |
30813e27 | 7430 | { |
57832e7b | 7431 | get_stateid(cstate, &u->write.wr_stateid); |
30813e27 | 7432 | } |