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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 | ||
abf1135b CH |
101 | static struct kmem_cache *openowner_slab; |
102 | static struct kmem_cache *lockowner_slab; | |
103 | static struct kmem_cache *file_slab; | |
104 | static struct kmem_cache *stateid_slab; | |
105 | static struct kmem_cache *deleg_slab; | |
8287f009 | 106 | static struct kmem_cache *odstate_slab; |
e60d4398 | 107 | |
66b2b9b2 | 108 | static void free_session(struct nfsd4_session *); |
508dc6e1 | 109 | |
c4cb8974 | 110 | static const struct nfsd4_callback_ops nfsd4_cb_recall_ops; |
76d348fa | 111 | static const struct nfsd4_callback_ops nfsd4_cb_notify_lock_ops; |
0162ac2b | 112 | |
f0f51f5c | 113 | static bool is_session_dead(struct nfsd4_session *ses) |
66b2b9b2 | 114 | { |
f0f51f5c | 115 | return ses->se_flags & NFS4_SESSION_DEAD; |
66b2b9b2 BF |
116 | } |
117 | ||
f0f51f5c | 118 | static __be32 mark_session_dead_locked(struct nfsd4_session *ses, int ref_held_by_me) |
508dc6e1 | 119 | { |
f0f51f5c | 120 | if (atomic_read(&ses->se_ref) > ref_held_by_me) |
66b2b9b2 BF |
121 | return nfserr_jukebox; |
122 | ses->se_flags |= NFS4_SESSION_DEAD; | |
123 | return nfs_ok; | |
508dc6e1 BH |
124 | } |
125 | ||
221a6876 BF |
126 | static bool is_client_expired(struct nfs4_client *clp) |
127 | { | |
128 | return clp->cl_time == 0; | |
129 | } | |
130 | ||
221a6876 BF |
131 | static __be32 get_client_locked(struct nfs4_client *clp) |
132 | { | |
0a880a28 TM |
133 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
134 | ||
135 | lockdep_assert_held(&nn->client_lock); | |
136 | ||
221a6876 BF |
137 | if (is_client_expired(clp)) |
138 | return nfserr_expired; | |
139 | atomic_inc(&clp->cl_refcount); | |
140 | return nfs_ok; | |
141 | } | |
142 | ||
143 | /* must be called under the client_lock */ | |
144 | static inline void | |
145 | renew_client_locked(struct nfs4_client *clp) | |
146 | { | |
147 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
148 | ||
149 | if (is_client_expired(clp)) { | |
150 | WARN_ON(1); | |
151 | printk("%s: client (clientid %08x/%08x) already expired\n", | |
152 | __func__, | |
153 | clp->cl_clientid.cl_boot, | |
154 | clp->cl_clientid.cl_id); | |
155 | return; | |
156 | } | |
157 | ||
158 | dprintk("renewing client (clientid %08x/%08x)\n", | |
159 | clp->cl_clientid.cl_boot, | |
160 | clp->cl_clientid.cl_id); | |
161 | list_move_tail(&clp->cl_lru, &nn->client_lru); | |
162 | clp->cl_time = get_seconds(); | |
163 | } | |
164 | ||
ba138435 | 165 | static void put_client_renew_locked(struct nfs4_client *clp) |
221a6876 | 166 | { |
0a880a28 TM |
167 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
168 | ||
169 | lockdep_assert_held(&nn->client_lock); | |
170 | ||
221a6876 BF |
171 | if (!atomic_dec_and_test(&clp->cl_refcount)) |
172 | return; | |
173 | if (!is_client_expired(clp)) | |
174 | renew_client_locked(clp); | |
175 | } | |
176 | ||
4b24ca7d JL |
177 | static void put_client_renew(struct nfs4_client *clp) |
178 | { | |
179 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
180 | ||
d6c249b4 JL |
181 | if (!atomic_dec_and_lock(&clp->cl_refcount, &nn->client_lock)) |
182 | return; | |
183 | if (!is_client_expired(clp)) | |
184 | renew_client_locked(clp); | |
4b24ca7d JL |
185 | spin_unlock(&nn->client_lock); |
186 | } | |
187 | ||
d4e19e70 TM |
188 | static __be32 nfsd4_get_session_locked(struct nfsd4_session *ses) |
189 | { | |
190 | __be32 status; | |
191 | ||
192 | if (is_session_dead(ses)) | |
193 | return nfserr_badsession; | |
194 | status = get_client_locked(ses->se_client); | |
195 | if (status) | |
196 | return status; | |
197 | atomic_inc(&ses->se_ref); | |
198 | return nfs_ok; | |
199 | } | |
200 | ||
201 | static void nfsd4_put_session_locked(struct nfsd4_session *ses) | |
202 | { | |
203 | struct nfs4_client *clp = ses->se_client; | |
0a880a28 TM |
204 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
205 | ||
206 | lockdep_assert_held(&nn->client_lock); | |
d4e19e70 TM |
207 | |
208 | if (atomic_dec_and_test(&ses->se_ref) && is_session_dead(ses)) | |
209 | free_session(ses); | |
210 | put_client_renew_locked(clp); | |
211 | } | |
212 | ||
213 | static void nfsd4_put_session(struct nfsd4_session *ses) | |
214 | { | |
215 | struct nfs4_client *clp = ses->se_client; | |
216 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
217 | ||
218 | spin_lock(&nn->client_lock); | |
219 | nfsd4_put_session_locked(ses); | |
220 | spin_unlock(&nn->client_lock); | |
221 | } | |
222 | ||
76d348fa JL |
223 | static struct nfsd4_blocked_lock * |
224 | find_blocked_lock(struct nfs4_lockowner *lo, struct knfsd_fh *fh, | |
225 | struct nfsd_net *nn) | |
226 | { | |
227 | struct nfsd4_blocked_lock *cur, *found = NULL; | |
228 | ||
0cc11a61 | 229 | spin_lock(&nn->blocked_locks_lock); |
76d348fa JL |
230 | list_for_each_entry(cur, &lo->lo_blocked, nbl_list) { |
231 | if (fh_match(fh, &cur->nbl_fh)) { | |
232 | list_del_init(&cur->nbl_list); | |
7919d0a2 | 233 | list_del_init(&cur->nbl_lru); |
76d348fa JL |
234 | found = cur; |
235 | break; | |
236 | } | |
237 | } | |
0cc11a61 | 238 | spin_unlock(&nn->blocked_locks_lock); |
76d348fa JL |
239 | if (found) |
240 | posix_unblock_lock(&found->nbl_lock); | |
241 | return found; | |
242 | } | |
243 | ||
244 | static struct nfsd4_blocked_lock * | |
245 | find_or_allocate_block(struct nfs4_lockowner *lo, struct knfsd_fh *fh, | |
246 | struct nfsd_net *nn) | |
247 | { | |
248 | struct nfsd4_blocked_lock *nbl; | |
249 | ||
250 | nbl = find_blocked_lock(lo, fh, nn); | |
251 | if (!nbl) { | |
252 | nbl= kmalloc(sizeof(*nbl), GFP_KERNEL); | |
253 | if (nbl) { | |
254 | fh_copy_shallow(&nbl->nbl_fh, fh); | |
255 | locks_init_lock(&nbl->nbl_lock); | |
256 | nfsd4_init_cb(&nbl->nbl_cb, lo->lo_owner.so_client, | |
257 | &nfsd4_cb_notify_lock_ops, | |
258 | NFSPROC4_CLNT_CB_NOTIFY_LOCK); | |
259 | } | |
260 | } | |
261 | return nbl; | |
262 | } | |
263 | ||
264 | static void | |
265 | free_blocked_lock(struct nfsd4_blocked_lock *nbl) | |
266 | { | |
267 | locks_release_private(&nbl->nbl_lock); | |
268 | kfree(nbl); | |
269 | } | |
270 | ||
271 | static int | |
272 | nfsd4_cb_notify_lock_done(struct nfsd4_callback *cb, struct rpc_task *task) | |
273 | { | |
274 | /* | |
275 | * Since this is just an optimization, we don't try very hard if it | |
276 | * turns out not to succeed. We'll requeue it on NFS4ERR_DELAY, and | |
277 | * just quit trying on anything else. | |
278 | */ | |
279 | switch (task->tk_status) { | |
280 | case -NFS4ERR_DELAY: | |
281 | rpc_delay(task, 1 * HZ); | |
282 | return 0; | |
283 | default: | |
284 | return 1; | |
285 | } | |
286 | } | |
287 | ||
288 | static void | |
289 | nfsd4_cb_notify_lock_release(struct nfsd4_callback *cb) | |
290 | { | |
291 | struct nfsd4_blocked_lock *nbl = container_of(cb, | |
292 | struct nfsd4_blocked_lock, nbl_cb); | |
293 | ||
294 | free_blocked_lock(nbl); | |
295 | } | |
296 | ||
297 | static const struct nfsd4_callback_ops nfsd4_cb_notify_lock_ops = { | |
298 | .done = nfsd4_cb_notify_lock_done, | |
299 | .release = nfsd4_cb_notify_lock_release, | |
300 | }; | |
301 | ||
b5971afa KM |
302 | static inline struct nfs4_stateowner * |
303 | nfs4_get_stateowner(struct nfs4_stateowner *sop) | |
304 | { | |
305 | atomic_inc(&sop->so_count); | |
306 | return sop; | |
307 | } | |
308 | ||
7ffb5880 | 309 | static int |
d4f0489f | 310 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner) |
7ffb5880 TM |
311 | { |
312 | return (sop->so_owner.len == owner->len) && | |
d4f0489f | 313 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len); |
7ffb5880 TM |
314 | } |
315 | ||
316 | static struct nfs4_openowner * | |
317 | find_openstateowner_str_locked(unsigned int hashval, struct nfsd4_open *open, | |
d4f0489f | 318 | struct nfs4_client *clp) |
7ffb5880 TM |
319 | { |
320 | struct nfs4_stateowner *so; | |
7ffb5880 | 321 | |
d4f0489f | 322 | lockdep_assert_held(&clp->cl_lock); |
7ffb5880 | 323 | |
d4f0489f TM |
324 | list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[hashval], |
325 | so_strhash) { | |
7ffb5880 TM |
326 | if (!so->so_is_open_owner) |
327 | continue; | |
b5971afa KM |
328 | if (same_owner_str(so, &open->op_owner)) |
329 | return openowner(nfs4_get_stateowner(so)); | |
7ffb5880 TM |
330 | } |
331 | return NULL; | |
332 | } | |
333 | ||
334 | static struct nfs4_openowner * | |
335 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, | |
d4f0489f | 336 | struct nfs4_client *clp) |
7ffb5880 TM |
337 | { |
338 | struct nfs4_openowner *oo; | |
339 | ||
d4f0489f TM |
340 | spin_lock(&clp->cl_lock); |
341 | oo = find_openstateowner_str_locked(hashval, open, clp); | |
342 | spin_unlock(&clp->cl_lock); | |
7ffb5880 TM |
343 | return oo; |
344 | } | |
345 | ||
1da177e4 LT |
346 | static inline u32 |
347 | opaque_hashval(const void *ptr, int nbytes) | |
348 | { | |
349 | unsigned char *cptr = (unsigned char *) ptr; | |
350 | ||
351 | u32 x = 0; | |
352 | while (nbytes--) { | |
353 | x *= 37; | |
354 | x += *cptr++; | |
355 | } | |
356 | return x; | |
357 | } | |
358 | ||
5b095e99 | 359 | static void nfsd4_free_file_rcu(struct rcu_head *rcu) |
32513b40 | 360 | { |
5b095e99 JL |
361 | struct nfs4_file *fp = container_of(rcu, struct nfs4_file, fi_rcu); |
362 | ||
363 | kmem_cache_free(file_slab, fp); | |
32513b40 BF |
364 | } |
365 | ||
e6ba76e1 | 366 | void |
13cd2184 N |
367 | put_nfs4_file(struct nfs4_file *fi) |
368 | { | |
02e1215f JL |
369 | might_lock(&state_lock); |
370 | ||
818a34eb | 371 | if (refcount_dec_and_lock(&fi->fi_ref, &state_lock)) { |
5b095e99 | 372 | hlist_del_rcu(&fi->fi_hash); |
cdc97505 | 373 | spin_unlock(&state_lock); |
8287f009 | 374 | WARN_ON_ONCE(!list_empty(&fi->fi_clnt_odstate)); |
5b095e99 JL |
375 | WARN_ON_ONCE(!list_empty(&fi->fi_delegations)); |
376 | call_rcu(&fi->fi_rcu, nfsd4_free_file_rcu); | |
8b671b80 | 377 | } |
13cd2184 N |
378 | } |
379 | ||
de18643d TM |
380 | static struct file * |
381 | __nfs4_get_fd(struct nfs4_file *f, int oflag) | |
382 | { | |
383 | if (f->fi_fds[oflag]) | |
384 | return get_file(f->fi_fds[oflag]); | |
385 | return NULL; | |
386 | } | |
387 | ||
388 | static struct file * | |
389 | find_writeable_file_locked(struct nfs4_file *f) | |
390 | { | |
391 | struct file *ret; | |
392 | ||
393 | lockdep_assert_held(&f->fi_lock); | |
394 | ||
395 | ret = __nfs4_get_fd(f, O_WRONLY); | |
396 | if (!ret) | |
397 | ret = __nfs4_get_fd(f, O_RDWR); | |
398 | return ret; | |
399 | } | |
400 | ||
401 | static struct file * | |
402 | find_writeable_file(struct nfs4_file *f) | |
403 | { | |
404 | struct file *ret; | |
405 | ||
406 | spin_lock(&f->fi_lock); | |
407 | ret = find_writeable_file_locked(f); | |
408 | spin_unlock(&f->fi_lock); | |
409 | ||
410 | return ret; | |
411 | } | |
412 | ||
413 | static struct file *find_readable_file_locked(struct nfs4_file *f) | |
414 | { | |
415 | struct file *ret; | |
416 | ||
417 | lockdep_assert_held(&f->fi_lock); | |
418 | ||
419 | ret = __nfs4_get_fd(f, O_RDONLY); | |
420 | if (!ret) | |
421 | ret = __nfs4_get_fd(f, O_RDWR); | |
422 | return ret; | |
423 | } | |
424 | ||
425 | static struct file * | |
426 | find_readable_file(struct nfs4_file *f) | |
427 | { | |
428 | struct file *ret; | |
429 | ||
430 | spin_lock(&f->fi_lock); | |
431 | ret = find_readable_file_locked(f); | |
432 | spin_unlock(&f->fi_lock); | |
433 | ||
434 | return ret; | |
435 | } | |
436 | ||
4d227fca | 437 | struct file * |
de18643d TM |
438 | find_any_file(struct nfs4_file *f) |
439 | { | |
440 | struct file *ret; | |
441 | ||
442 | spin_lock(&f->fi_lock); | |
443 | ret = __nfs4_get_fd(f, O_RDWR); | |
444 | if (!ret) { | |
445 | ret = __nfs4_get_fd(f, O_WRONLY); | |
446 | if (!ret) | |
447 | ret = __nfs4_get_fd(f, O_RDONLY); | |
448 | } | |
449 | spin_unlock(&f->fi_lock); | |
450 | return ret; | |
451 | } | |
452 | ||
02a3508d | 453 | static atomic_long_t num_delegations; |
697ce9be | 454 | unsigned long max_delegations; |
ef0f3390 N |
455 | |
456 | /* | |
457 | * Open owner state (share locks) | |
458 | */ | |
459 | ||
16bfdaaf BF |
460 | /* hash tables for lock and open owners */ |
461 | #define OWNER_HASH_BITS 8 | |
462 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
463 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
ef0f3390 | 464 | |
d4f0489f | 465 | static unsigned int ownerstr_hashval(struct xdr_netobj *ownername) |
ddc04c41 BF |
466 | { |
467 | unsigned int ret; | |
468 | ||
469 | ret = opaque_hashval(ownername->data, ownername->len); | |
16bfdaaf | 470 | return ret & OWNER_HASH_MASK; |
ddc04c41 | 471 | } |
ef0f3390 | 472 | |
ef0f3390 N |
473 | /* hash table for nfs4_file */ |
474 | #define FILE_HASH_BITS 8 | |
475 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
35079582 | 476 | |
ca943217 | 477 | static unsigned int nfsd_fh_hashval(struct knfsd_fh *fh) |
ddc04c41 | 478 | { |
ca943217 TM |
479 | return jhash2(fh->fh_base.fh_pad, XDR_QUADLEN(fh->fh_size), 0); |
480 | } | |
481 | ||
482 | static unsigned int file_hashval(struct knfsd_fh *fh) | |
483 | { | |
484 | return nfsd_fh_hashval(fh) & (FILE_HASH_SIZE - 1); | |
485 | } | |
486 | ||
89876f8c | 487 | static struct hlist_head file_hashtbl[FILE_HASH_SIZE]; |
ef0f3390 | 488 | |
12659651 JL |
489 | static void |
490 | __nfs4_file_get_access(struct nfs4_file *fp, u32 access) | |
3477565e | 491 | { |
7214e860 JL |
492 | lockdep_assert_held(&fp->fi_lock); |
493 | ||
12659651 JL |
494 | if (access & NFS4_SHARE_ACCESS_WRITE) |
495 | atomic_inc(&fp->fi_access[O_WRONLY]); | |
496 | if (access & NFS4_SHARE_ACCESS_READ) | |
497 | atomic_inc(&fp->fi_access[O_RDONLY]); | |
3477565e BF |
498 | } |
499 | ||
12659651 JL |
500 | static __be32 |
501 | nfs4_file_get_access(struct nfs4_file *fp, u32 access) | |
998db52c | 502 | { |
7214e860 JL |
503 | lockdep_assert_held(&fp->fi_lock); |
504 | ||
12659651 JL |
505 | /* Does this access mode make sense? */ |
506 | if (access & ~NFS4_SHARE_ACCESS_BOTH) | |
507 | return nfserr_inval; | |
508 | ||
baeb4ff0 JL |
509 | /* Does it conflict with a deny mode already set? */ |
510 | if ((access & fp->fi_share_deny) != 0) | |
511 | return nfserr_share_denied; | |
512 | ||
12659651 JL |
513 | __nfs4_file_get_access(fp, access); |
514 | return nfs_ok; | |
998db52c BF |
515 | } |
516 | ||
baeb4ff0 JL |
517 | static __be32 nfs4_file_check_deny(struct nfs4_file *fp, u32 deny) |
518 | { | |
519 | /* Common case is that there is no deny mode. */ | |
520 | if (deny) { | |
521 | /* Does this deny mode make sense? */ | |
522 | if (deny & ~NFS4_SHARE_DENY_BOTH) | |
523 | return nfserr_inval; | |
524 | ||
525 | if ((deny & NFS4_SHARE_DENY_READ) && | |
526 | atomic_read(&fp->fi_access[O_RDONLY])) | |
527 | return nfserr_share_denied; | |
528 | ||
529 | if ((deny & NFS4_SHARE_DENY_WRITE) && | |
530 | atomic_read(&fp->fi_access[O_WRONLY])) | |
531 | return nfserr_share_denied; | |
532 | } | |
533 | return nfs_ok; | |
534 | } | |
535 | ||
998db52c | 536 | static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
f9d7562f | 537 | { |
de18643d TM |
538 | might_lock(&fp->fi_lock); |
539 | ||
540 | if (atomic_dec_and_lock(&fp->fi_access[oflag], &fp->fi_lock)) { | |
541 | struct file *f1 = NULL; | |
542 | struct file *f2 = NULL; | |
543 | ||
6d338b51 | 544 | swap(f1, fp->fi_fds[oflag]); |
0c7c3e67 | 545 | if (atomic_read(&fp->fi_access[1 - oflag]) == 0) |
6d338b51 | 546 | swap(f2, fp->fi_fds[O_RDWR]); |
de18643d TM |
547 | spin_unlock(&fp->fi_lock); |
548 | if (f1) | |
549 | fput(f1); | |
550 | if (f2) | |
551 | fput(f2); | |
f9d7562f BF |
552 | } |
553 | } | |
554 | ||
12659651 | 555 | static void nfs4_file_put_access(struct nfs4_file *fp, u32 access) |
998db52c | 556 | { |
12659651 JL |
557 | WARN_ON_ONCE(access & ~NFS4_SHARE_ACCESS_BOTH); |
558 | ||
559 | if (access & NFS4_SHARE_ACCESS_WRITE) | |
998db52c | 560 | __nfs4_file_put_access(fp, O_WRONLY); |
12659651 JL |
561 | if (access & NFS4_SHARE_ACCESS_READ) |
562 | __nfs4_file_put_access(fp, O_RDONLY); | |
998db52c BF |
563 | } |
564 | ||
8287f009 SB |
565 | /* |
566 | * Allocate a new open/delegation state counter. This is needed for | |
567 | * pNFS for proper return on close semantics. | |
568 | * | |
569 | * Note that we only allocate it for pNFS-enabled exports, otherwise | |
570 | * all pointers to struct nfs4_clnt_odstate are always NULL. | |
571 | */ | |
572 | static struct nfs4_clnt_odstate * | |
573 | alloc_clnt_odstate(struct nfs4_client *clp) | |
574 | { | |
575 | struct nfs4_clnt_odstate *co; | |
576 | ||
577 | co = kmem_cache_zalloc(odstate_slab, GFP_KERNEL); | |
578 | if (co) { | |
579 | co->co_client = clp; | |
cff7cb2e | 580 | refcount_set(&co->co_odcount, 1); |
8287f009 SB |
581 | } |
582 | return co; | |
583 | } | |
584 | ||
585 | static void | |
586 | hash_clnt_odstate_locked(struct nfs4_clnt_odstate *co) | |
587 | { | |
588 | struct nfs4_file *fp = co->co_file; | |
589 | ||
590 | lockdep_assert_held(&fp->fi_lock); | |
591 | list_add(&co->co_perfile, &fp->fi_clnt_odstate); | |
592 | } | |
593 | ||
594 | static inline void | |
595 | get_clnt_odstate(struct nfs4_clnt_odstate *co) | |
596 | { | |
597 | if (co) | |
cff7cb2e | 598 | refcount_inc(&co->co_odcount); |
8287f009 SB |
599 | } |
600 | ||
601 | static void | |
602 | put_clnt_odstate(struct nfs4_clnt_odstate *co) | |
603 | { | |
604 | struct nfs4_file *fp; | |
605 | ||
606 | if (!co) | |
607 | return; | |
608 | ||
609 | fp = co->co_file; | |
cff7cb2e | 610 | if (refcount_dec_and_lock(&co->co_odcount, &fp->fi_lock)) { |
8287f009 SB |
611 | list_del(&co->co_perfile); |
612 | spin_unlock(&fp->fi_lock); | |
613 | ||
614 | nfsd4_return_all_file_layouts(co->co_client, fp); | |
615 | kmem_cache_free(odstate_slab, co); | |
616 | } | |
617 | } | |
618 | ||
619 | static struct nfs4_clnt_odstate * | |
620 | find_or_hash_clnt_odstate(struct nfs4_file *fp, struct nfs4_clnt_odstate *new) | |
621 | { | |
622 | struct nfs4_clnt_odstate *co; | |
623 | struct nfs4_client *cl; | |
624 | ||
625 | if (!new) | |
626 | return NULL; | |
627 | ||
628 | cl = new->co_client; | |
629 | ||
630 | spin_lock(&fp->fi_lock); | |
631 | list_for_each_entry(co, &fp->fi_clnt_odstate, co_perfile) { | |
632 | if (co->co_client == cl) { | |
633 | get_clnt_odstate(co); | |
634 | goto out; | |
635 | } | |
636 | } | |
637 | co = new; | |
638 | co->co_file = fp; | |
639 | hash_clnt_odstate_locked(new); | |
640 | out: | |
641 | spin_unlock(&fp->fi_lock); | |
642 | return co; | |
643 | } | |
644 | ||
d19fb70d KM |
645 | struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct kmem_cache *slab, |
646 | void (*sc_free)(struct nfs4_stid *)) | |
2a74aba7 | 647 | { |
3abdb607 | 648 | struct nfs4_stid *stid; |
6136d2b4 | 649 | int new_id; |
2a74aba7 | 650 | |
f8338834 | 651 | stid = kmem_cache_zalloc(slab, GFP_KERNEL); |
3abdb607 BF |
652 | if (!stid) |
653 | return NULL; | |
654 | ||
4770d722 JL |
655 | idr_preload(GFP_KERNEL); |
656 | spin_lock(&cl->cl_lock); | |
657 | new_id = idr_alloc_cyclic(&cl->cl_stateids, stid, 0, 0, GFP_NOWAIT); | |
658 | spin_unlock(&cl->cl_lock); | |
659 | idr_preload_end(); | |
ebd6c707 | 660 | if (new_id < 0) |
3abdb607 | 661 | goto out_free; |
d19fb70d KM |
662 | |
663 | stid->sc_free = sc_free; | |
2a74aba7 | 664 | stid->sc_client = cl; |
3abdb607 BF |
665 | stid->sc_stateid.si_opaque.so_id = new_id; |
666 | stid->sc_stateid.si_opaque.so_clid = cl->cl_clientid; | |
2a74aba7 | 667 | /* Will be incremented before return to client: */ |
a15dfcd5 | 668 | refcount_set(&stid->sc_count, 1); |
9767feb2 | 669 | spin_lock_init(&stid->sc_lock); |
996e0938 | 670 | |
996e0938 | 671 | /* |
3abdb607 BF |
672 | * It shouldn't be a problem to reuse an opaque stateid value. |
673 | * I don't think it is for 4.1. But with 4.0 I worry that, for | |
674 | * example, a stray write retransmission could be accepted by | |
675 | * the server when it should have been rejected. Therefore, | |
676 | * adopt a trick from the sctp code to attempt to maximize the | |
677 | * amount of time until an id is reused, by ensuring they always | |
678 | * "increase" (mod INT_MAX): | |
996e0938 | 679 | */ |
3abdb607 BF |
680 | return stid; |
681 | out_free: | |
2c44a234 | 682 | kmem_cache_free(slab, stid); |
3abdb607 | 683 | return NULL; |
2a74aba7 BF |
684 | } |
685 | ||
b49e084d | 686 | static struct nfs4_ol_stateid * nfs4_alloc_open_stateid(struct nfs4_client *clp) |
4cdc951b | 687 | { |
6011695d | 688 | struct nfs4_stid *stid; |
6011695d | 689 | |
d19fb70d | 690 | stid = nfs4_alloc_stid(clp, stateid_slab, nfs4_free_ol_stateid); |
6011695d TM |
691 | if (!stid) |
692 | return NULL; | |
693 | ||
d19fb70d | 694 | return openlockstateid(stid); |
6011695d TM |
695 | } |
696 | ||
697 | static void nfs4_free_deleg(struct nfs4_stid *stid) | |
698 | { | |
6011695d TM |
699 | kmem_cache_free(deleg_slab, stid); |
700 | atomic_long_dec(&num_delegations); | |
4cdc951b BF |
701 | } |
702 | ||
6282cd56 N |
703 | /* |
704 | * When we recall a delegation, we should be careful not to hand it | |
705 | * out again straight away. | |
706 | * To ensure this we keep a pair of bloom filters ('new' and 'old') | |
707 | * in which the filehandles of recalled delegations are "stored". | |
708 | * If a filehandle appear in either filter, a delegation is blocked. | |
709 | * When a delegation is recalled, the filehandle is stored in the "new" | |
710 | * filter. | |
711 | * Every 30 seconds we swap the filters and clear the "new" one, | |
712 | * unless both are empty of course. | |
713 | * | |
714 | * Each filter is 256 bits. We hash the filehandle to 32bit and use the | |
715 | * low 3 bytes as hash-table indices. | |
716 | * | |
f54fe962 | 717 | * 'blocked_delegations_lock', which is always taken in block_delegations(), |
6282cd56 N |
718 | * is used to manage concurrent access. Testing does not need the lock |
719 | * except when swapping the two filters. | |
720 | */ | |
f54fe962 | 721 | static DEFINE_SPINLOCK(blocked_delegations_lock); |
6282cd56 N |
722 | static struct bloom_pair { |
723 | int entries, old_entries; | |
724 | time_t swap_time; | |
725 | int new; /* index into 'set' */ | |
726 | DECLARE_BITMAP(set[2], 256); | |
727 | } blocked_delegations; | |
728 | ||
729 | static int delegation_blocked(struct knfsd_fh *fh) | |
730 | { | |
731 | u32 hash; | |
732 | struct bloom_pair *bd = &blocked_delegations; | |
733 | ||
734 | if (bd->entries == 0) | |
735 | return 0; | |
736 | if (seconds_since_boot() - bd->swap_time > 30) { | |
f54fe962 | 737 | spin_lock(&blocked_delegations_lock); |
6282cd56 N |
738 | if (seconds_since_boot() - bd->swap_time > 30) { |
739 | bd->entries -= bd->old_entries; | |
740 | bd->old_entries = bd->entries; | |
741 | memset(bd->set[bd->new], 0, | |
742 | sizeof(bd->set[0])); | |
743 | bd->new = 1-bd->new; | |
744 | bd->swap_time = seconds_since_boot(); | |
745 | } | |
f54fe962 | 746 | spin_unlock(&blocked_delegations_lock); |
6282cd56 | 747 | } |
87545899 | 748 | hash = jhash(&fh->fh_base, fh->fh_size, 0); |
6282cd56 N |
749 | if (test_bit(hash&255, bd->set[0]) && |
750 | test_bit((hash>>8)&255, bd->set[0]) && | |
751 | test_bit((hash>>16)&255, bd->set[0])) | |
752 | return 1; | |
753 | ||
754 | if (test_bit(hash&255, bd->set[1]) && | |
755 | test_bit((hash>>8)&255, bd->set[1]) && | |
756 | test_bit((hash>>16)&255, bd->set[1])) | |
757 | return 1; | |
758 | ||
759 | return 0; | |
760 | } | |
761 | ||
762 | static void block_delegations(struct knfsd_fh *fh) | |
763 | { | |
764 | u32 hash; | |
765 | struct bloom_pair *bd = &blocked_delegations; | |
766 | ||
87545899 | 767 | hash = jhash(&fh->fh_base, fh->fh_size, 0); |
6282cd56 | 768 | |
f54fe962 | 769 | spin_lock(&blocked_delegations_lock); |
6282cd56 N |
770 | __set_bit(hash&255, bd->set[bd->new]); |
771 | __set_bit((hash>>8)&255, bd->set[bd->new]); | |
772 | __set_bit((hash>>16)&255, bd->set[bd->new]); | |
773 | if (bd->entries == 0) | |
774 | bd->swap_time = seconds_since_boot(); | |
775 | bd->entries += 1; | |
f54fe962 | 776 | spin_unlock(&blocked_delegations_lock); |
6282cd56 N |
777 | } |
778 | ||
1da177e4 | 779 | static struct nfs4_delegation * |
8287f009 SB |
780 | alloc_init_deleg(struct nfs4_client *clp, struct svc_fh *current_fh, |
781 | struct nfs4_clnt_odstate *odstate) | |
1da177e4 LT |
782 | { |
783 | struct nfs4_delegation *dp; | |
02a3508d | 784 | long n; |
1da177e4 LT |
785 | |
786 | dprintk("NFSD alloc_init_deleg\n"); | |
02a3508d TM |
787 | n = atomic_long_inc_return(&num_delegations); |
788 | if (n < 0 || n > max_delegations) | |
789 | goto out_dec; | |
6282cd56 | 790 | if (delegation_blocked(¤t_fh->fh_handle)) |
02a3508d | 791 | goto out_dec; |
d19fb70d | 792 | dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab, nfs4_free_deleg)); |
5b2d21c1 | 793 | if (dp == NULL) |
02a3508d | 794 | goto out_dec; |
6011695d | 795 | |
2a74aba7 BF |
796 | /* |
797 | * delegation seqid's are never incremented. The 4.1 special | |
6136d2b4 BF |
798 | * meaning of seqid 0 isn't meaningful, really, but let's avoid |
799 | * 0 anyway just for consistency and use 1: | |
2a74aba7 BF |
800 | */ |
801 | dp->dl_stid.sc_stateid.si_generation = 1; | |
ea1da636 N |
802 | INIT_LIST_HEAD(&dp->dl_perfile); |
803 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 | 804 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
8287f009 SB |
805 | dp->dl_clnt_odstate = odstate; |
806 | get_clnt_odstate(odstate); | |
99c41515 | 807 | dp->dl_type = NFS4_OPEN_DELEGATE_READ; |
f0b5de1b CH |
808 | dp->dl_retries = 1; |
809 | nfsd4_init_cb(&dp->dl_recall, dp->dl_stid.sc_client, | |
0162ac2b | 810 | &nfsd4_cb_recall_ops, NFSPROC4_CLNT_CB_RECALL); |
1da177e4 | 811 | return dp; |
02a3508d TM |
812 | out_dec: |
813 | atomic_long_dec(&num_delegations); | |
814 | return NULL; | |
1da177e4 LT |
815 | } |
816 | ||
817 | void | |
6011695d | 818 | nfs4_put_stid(struct nfs4_stid *s) |
1da177e4 | 819 | { |
11b9164a | 820 | struct nfs4_file *fp = s->sc_file; |
6011695d TM |
821 | struct nfs4_client *clp = s->sc_client; |
822 | ||
4770d722 JL |
823 | might_lock(&clp->cl_lock); |
824 | ||
a15dfcd5 | 825 | if (!refcount_dec_and_lock(&s->sc_count, &clp->cl_lock)) { |
b401be22 | 826 | wake_up_all(&close_wq); |
6011695d | 827 | return; |
b401be22 | 828 | } |
6011695d | 829 | idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id); |
4770d722 | 830 | spin_unlock(&clp->cl_lock); |
6011695d | 831 | s->sc_free(s); |
11b9164a TM |
832 | if (fp) |
833 | put_nfs4_file(fp); | |
1da177e4 LT |
834 | } |
835 | ||
9767feb2 JL |
836 | void |
837 | nfs4_inc_and_copy_stateid(stateid_t *dst, struct nfs4_stid *stid) | |
838 | { | |
839 | stateid_t *src = &stid->sc_stateid; | |
840 | ||
841 | spin_lock(&stid->sc_lock); | |
842 | if (unlikely(++src->si_generation == 0)) | |
843 | src->si_generation = 1; | |
844 | memcpy(dst, src, sizeof(*dst)); | |
845 | spin_unlock(&stid->sc_lock); | |
846 | } | |
847 | ||
acfdf5c3 | 848 | static void nfs4_put_deleg_lease(struct nfs4_file *fp) |
1da177e4 | 849 | { |
6bcc034e | 850 | struct file *filp = NULL; |
417c6629 | 851 | |
6bcc034e | 852 | spin_lock(&fp->fi_lock); |
67db1034 | 853 | if (fp->fi_deleg_file && --fp->fi_delegees == 0) |
6bcc034e | 854 | swap(filp, fp->fi_deleg_file); |
6bcc034e JL |
855 | spin_unlock(&fp->fi_lock); |
856 | ||
857 | if (filp) { | |
2ab99ee1 | 858 | vfs_setlease(filp, F_UNLCK, NULL, (void **)&fp); |
6bcc034e | 859 | fput(filp); |
acfdf5c3 | 860 | } |
1da177e4 LT |
861 | } |
862 | ||
cd61c522 | 863 | void nfs4_unhash_stid(struct nfs4_stid *s) |
6136d2b4 | 864 | { |
3abdb607 | 865 | s->sc_type = 0; |
6136d2b4 BF |
866 | } |
867 | ||
34ed9872 AE |
868 | /** |
869 | * nfs4_get_existing_delegation - Discover if this delegation already exists | |
870 | * @clp: a pointer to the nfs4_client we're granting a delegation to | |
871 | * @fp: a pointer to the nfs4_file we're granting a delegation on | |
872 | * | |
873 | * Return: | |
874 | * On success: NULL if an existing delegation was not found. | |
875 | * | |
876 | * On error: -EAGAIN if one was previously granted to this nfs4_client | |
877 | * for this nfs4_file. | |
878 | * | |
879 | */ | |
880 | ||
881 | static int | |
882 | nfs4_get_existing_delegation(struct nfs4_client *clp, struct nfs4_file *fp) | |
883 | { | |
884 | struct nfs4_delegation *searchdp = NULL; | |
885 | struct nfs4_client *searchclp = NULL; | |
886 | ||
887 | lockdep_assert_held(&state_lock); | |
888 | lockdep_assert_held(&fp->fi_lock); | |
889 | ||
890 | list_for_each_entry(searchdp, &fp->fi_delegations, dl_perfile) { | |
891 | searchclp = searchdp->dl_stid.sc_client; | |
892 | if (clp == searchclp) { | |
893 | return -EAGAIN; | |
894 | } | |
895 | } | |
896 | return 0; | |
897 | } | |
898 | ||
899 | /** | |
900 | * hash_delegation_locked - Add a delegation to the appropriate lists | |
901 | * @dp: a pointer to the nfs4_delegation we are adding. | |
902 | * @fp: a pointer to the nfs4_file we're granting a delegation on | |
903 | * | |
904 | * Return: | |
905 | * On success: NULL if the delegation was successfully hashed. | |
906 | * | |
907 | * On error: -EAGAIN if one was previously granted to this | |
908 | * nfs4_client for this nfs4_file. Delegation is not hashed. | |
909 | * | |
910 | */ | |
911 | ||
912 | static int | |
931ee56c BH |
913 | hash_delegation_locked(struct nfs4_delegation *dp, struct nfs4_file *fp) |
914 | { | |
34ed9872 AE |
915 | int status; |
916 | struct nfs4_client *clp = dp->dl_stid.sc_client; | |
917 | ||
cdc97505 | 918 | lockdep_assert_held(&state_lock); |
417c6629 | 919 | lockdep_assert_held(&fp->fi_lock); |
931ee56c | 920 | |
34ed9872 AE |
921 | status = nfs4_get_existing_delegation(clp, fp); |
922 | if (status) | |
923 | return status; | |
924 | ++fp->fi_delegees; | |
a15dfcd5 | 925 | refcount_inc(&dp->dl_stid.sc_count); |
3fb87d13 | 926 | dp->dl_stid.sc_type = NFS4_DELEG_STID; |
931ee56c | 927 | list_add(&dp->dl_perfile, &fp->fi_delegations); |
34ed9872 AE |
928 | list_add(&dp->dl_perclnt, &clp->cl_delegations); |
929 | return 0; | |
931ee56c BH |
930 | } |
931 | ||
3fcbbd24 | 932 | static bool |
42690676 | 933 | unhash_delegation_locked(struct nfs4_delegation *dp) |
1da177e4 | 934 | { |
11b9164a | 935 | struct nfs4_file *fp = dp->dl_stid.sc_file; |
02e1215f | 936 | |
42690676 JL |
937 | lockdep_assert_held(&state_lock); |
938 | ||
3fcbbd24 JL |
939 | if (list_empty(&dp->dl_perfile)) |
940 | return false; | |
941 | ||
b0fc29d6 | 942 | dp->dl_stid.sc_type = NFS4_CLOSED_DELEG_STID; |
d55a166c JL |
943 | /* Ensure that deleg break won't try to requeue it */ |
944 | ++dp->dl_time; | |
417c6629 | 945 | spin_lock(&fp->fi_lock); |
931ee56c | 946 | list_del_init(&dp->dl_perclnt); |
1da177e4 | 947 | list_del_init(&dp->dl_recall_lru); |
02e1215f JL |
948 | list_del_init(&dp->dl_perfile); |
949 | spin_unlock(&fp->fi_lock); | |
3fcbbd24 | 950 | return true; |
3bd64a5b BF |
951 | } |
952 | ||
3bd64a5b BF |
953 | static void destroy_delegation(struct nfs4_delegation *dp) |
954 | { | |
3fcbbd24 JL |
955 | bool unhashed; |
956 | ||
42690676 | 957 | spin_lock(&state_lock); |
3fcbbd24 | 958 | unhashed = unhash_delegation_locked(dp); |
42690676 | 959 | spin_unlock(&state_lock); |
3fcbbd24 JL |
960 | if (unhashed) { |
961 | put_clnt_odstate(dp->dl_clnt_odstate); | |
962 | nfs4_put_deleg_lease(dp->dl_stid.sc_file); | |
963 | nfs4_put_stid(&dp->dl_stid); | |
964 | } | |
3bd64a5b BF |
965 | } |
966 | ||
967 | static void revoke_delegation(struct nfs4_delegation *dp) | |
968 | { | |
969 | struct nfs4_client *clp = dp->dl_stid.sc_client; | |
970 | ||
2d4a532d JL |
971 | WARN_ON(!list_empty(&dp->dl_recall_lru)); |
972 | ||
8287f009 | 973 | put_clnt_odstate(dp->dl_clnt_odstate); |
afbda402 JL |
974 | nfs4_put_deleg_lease(dp->dl_stid.sc_file); |
975 | ||
3bd64a5b | 976 | if (clp->cl_minorversion == 0) |
6011695d | 977 | nfs4_put_stid(&dp->dl_stid); |
3bd64a5b | 978 | else { |
3bd64a5b | 979 | dp->dl_stid.sc_type = NFS4_REVOKED_DELEG_STID; |
2d4a532d JL |
980 | spin_lock(&clp->cl_lock); |
981 | list_add(&dp->dl_recall_lru, &clp->cl_revoked); | |
982 | spin_unlock(&clp->cl_lock); | |
3bd64a5b BF |
983 | } |
984 | } | |
985 | ||
1da177e4 LT |
986 | /* |
987 | * SETCLIENTID state | |
988 | */ | |
989 | ||
ddc04c41 BF |
990 | static unsigned int clientid_hashval(u32 id) |
991 | { | |
992 | return id & CLIENT_HASH_MASK; | |
993 | } | |
994 | ||
995 | static unsigned int clientstr_hashval(const char *name) | |
996 | { | |
997 | return opaque_hashval(name, 8) & CLIENT_HASH_MASK; | |
998 | } | |
999 | ||
f9d7562f BF |
1000 | /* |
1001 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
1002 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
1003 | * only what share bits are currently in force, but also what | |
1004 | * combinations of share bits previous opens have used. This allows us | |
1005 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
1006 | * return an error if the client attempt to downgrade to a combination | |
1007 | * of share bits not explicable by closing some of its previous opens. | |
1008 | * | |
1009 | * XXX: This enforcement is actually incomplete, since we don't keep | |
1010 | * track of access/deny bit combinations; so, e.g., we allow: | |
1011 | * | |
1012 | * OPEN allow read, deny write | |
1013 | * OPEN allow both, deny none | |
1014 | * DOWNGRADE allow read, deny none | |
1015 | * | |
1016 | * which we should reject. | |
1017 | */ | |
5ae037e5 JL |
1018 | static unsigned int |
1019 | bmap_to_share_mode(unsigned long bmap) { | |
f9d7562f | 1020 | int i; |
5ae037e5 | 1021 | unsigned int access = 0; |
f9d7562f | 1022 | |
f9d7562f BF |
1023 | for (i = 1; i < 4; i++) { |
1024 | if (test_bit(i, &bmap)) | |
5ae037e5 | 1025 | access |= i; |
f9d7562f | 1026 | } |
5ae037e5 | 1027 | return access; |
f9d7562f BF |
1028 | } |
1029 | ||
82c5ff1b JL |
1030 | /* set share access for a given stateid */ |
1031 | static inline void | |
1032 | set_access(u32 access, struct nfs4_ol_stateid *stp) | |
1033 | { | |
c11c591f JL |
1034 | unsigned char mask = 1 << access; |
1035 | ||
1036 | WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH); | |
1037 | stp->st_access_bmap |= mask; | |
82c5ff1b JL |
1038 | } |
1039 | ||
1040 | /* clear share access for a given stateid */ | |
1041 | static inline void | |
1042 | clear_access(u32 access, struct nfs4_ol_stateid *stp) | |
1043 | { | |
c11c591f JL |
1044 | unsigned char mask = 1 << access; |
1045 | ||
1046 | WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH); | |
1047 | stp->st_access_bmap &= ~mask; | |
82c5ff1b JL |
1048 | } |
1049 | ||
1050 | /* test whether a given stateid has access */ | |
1051 | static inline bool | |
1052 | test_access(u32 access, struct nfs4_ol_stateid *stp) | |
1053 | { | |
c11c591f JL |
1054 | unsigned char mask = 1 << access; |
1055 | ||
1056 | return (bool)(stp->st_access_bmap & mask); | |
82c5ff1b JL |
1057 | } |
1058 | ||
ce0fc43c JL |
1059 | /* set share deny for a given stateid */ |
1060 | static inline void | |
c11c591f | 1061 | set_deny(u32 deny, struct nfs4_ol_stateid *stp) |
ce0fc43c | 1062 | { |
c11c591f JL |
1063 | unsigned char mask = 1 << deny; |
1064 | ||
1065 | WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH); | |
1066 | stp->st_deny_bmap |= mask; | |
ce0fc43c JL |
1067 | } |
1068 | ||
1069 | /* clear share deny for a given stateid */ | |
1070 | static inline void | |
c11c591f | 1071 | clear_deny(u32 deny, struct nfs4_ol_stateid *stp) |
ce0fc43c | 1072 | { |
c11c591f JL |
1073 | unsigned char mask = 1 << deny; |
1074 | ||
1075 | WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH); | |
1076 | stp->st_deny_bmap &= ~mask; | |
ce0fc43c JL |
1077 | } |
1078 | ||
1079 | /* test whether a given stateid is denying specific access */ | |
1080 | static inline bool | |
c11c591f | 1081 | test_deny(u32 deny, struct nfs4_ol_stateid *stp) |
ce0fc43c | 1082 | { |
c11c591f JL |
1083 | unsigned char mask = 1 << deny; |
1084 | ||
1085 | return (bool)(stp->st_deny_bmap & mask); | |
f9d7562f BF |
1086 | } |
1087 | ||
1088 | static int nfs4_access_to_omode(u32 access) | |
1089 | { | |
8f34a430 | 1090 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
1091 | case NFS4_SHARE_ACCESS_READ: |
1092 | return O_RDONLY; | |
1093 | case NFS4_SHARE_ACCESS_WRITE: | |
1094 | return O_WRONLY; | |
1095 | case NFS4_SHARE_ACCESS_BOTH: | |
1096 | return O_RDWR; | |
1097 | } | |
063b0fb9 BF |
1098 | WARN_ON_ONCE(1); |
1099 | return O_RDONLY; | |
f9d7562f BF |
1100 | } |
1101 | ||
baeb4ff0 JL |
1102 | /* |
1103 | * A stateid that had a deny mode associated with it is being released | |
1104 | * or downgraded. Recalculate the deny mode on the file. | |
1105 | */ | |
1106 | static void | |
1107 | recalculate_deny_mode(struct nfs4_file *fp) | |
1108 | { | |
1109 | struct nfs4_ol_stateid *stp; | |
1110 | ||
1111 | spin_lock(&fp->fi_lock); | |
1112 | fp->fi_share_deny = 0; | |
1113 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) | |
1114 | fp->fi_share_deny |= bmap_to_share_mode(stp->st_deny_bmap); | |
1115 | spin_unlock(&fp->fi_lock); | |
1116 | } | |
1117 | ||
1118 | static void | |
1119 | reset_union_bmap_deny(u32 deny, struct nfs4_ol_stateid *stp) | |
1120 | { | |
1121 | int i; | |
1122 | bool change = false; | |
1123 | ||
1124 | for (i = 1; i < 4; i++) { | |
1125 | if ((i & deny) != i) { | |
1126 | change = true; | |
1127 | clear_deny(i, stp); | |
1128 | } | |
1129 | } | |
1130 | ||
1131 | /* Recalculate per-file deny mode if there was a change */ | |
1132 | if (change) | |
11b9164a | 1133 | recalculate_deny_mode(stp->st_stid.sc_file); |
baeb4ff0 JL |
1134 | } |
1135 | ||
82c5ff1b JL |
1136 | /* release all access and file references for a given stateid */ |
1137 | static void | |
1138 | release_all_access(struct nfs4_ol_stateid *stp) | |
1139 | { | |
1140 | int i; | |
11b9164a | 1141 | struct nfs4_file *fp = stp->st_stid.sc_file; |
baeb4ff0 JL |
1142 | |
1143 | if (fp && stp->st_deny_bmap != 0) | |
1144 | recalculate_deny_mode(fp); | |
82c5ff1b JL |
1145 | |
1146 | for (i = 1; i < 4; i++) { | |
1147 | if (test_access(i, stp)) | |
11b9164a | 1148 | nfs4_file_put_access(stp->st_stid.sc_file, i); |
82c5ff1b JL |
1149 | clear_access(i, stp); |
1150 | } | |
1151 | } | |
1152 | ||
d50ffded KM |
1153 | static inline void nfs4_free_stateowner(struct nfs4_stateowner *sop) |
1154 | { | |
1155 | kfree(sop->so_owner.data); | |
1156 | sop->so_ops->so_free(sop); | |
1157 | } | |
1158 | ||
6b180f0b JL |
1159 | static void nfs4_put_stateowner(struct nfs4_stateowner *sop) |
1160 | { | |
a819ecc1 JL |
1161 | struct nfs4_client *clp = sop->so_client; |
1162 | ||
1163 | might_lock(&clp->cl_lock); | |
1164 | ||
1165 | if (!atomic_dec_and_lock(&sop->so_count, &clp->cl_lock)) | |
6b180f0b | 1166 | return; |
8f4b54c5 | 1167 | sop->so_ops->so_unhash(sop); |
a819ecc1 | 1168 | spin_unlock(&clp->cl_lock); |
d50ffded | 1169 | nfs4_free_stateowner(sop); |
6b180f0b JL |
1170 | } |
1171 | ||
e8568739 | 1172 | static bool unhash_ol_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 1173 | { |
11b9164a | 1174 | struct nfs4_file *fp = stp->st_stid.sc_file; |
1d31a253 | 1175 | |
1c755dc1 JL |
1176 | lockdep_assert_held(&stp->st_stateowner->so_client->cl_lock); |
1177 | ||
e8568739 JL |
1178 | if (list_empty(&stp->st_perfile)) |
1179 | return false; | |
1180 | ||
1d31a253 | 1181 | spin_lock(&fp->fi_lock); |
e8568739 | 1182 | list_del_init(&stp->st_perfile); |
1d31a253 | 1183 | spin_unlock(&fp->fi_lock); |
529d7b2a | 1184 | list_del(&stp->st_perstateowner); |
e8568739 | 1185 | return true; |
529d7b2a BF |
1186 | } |
1187 | ||
6011695d | 1188 | static void nfs4_free_ol_stateid(struct nfs4_stid *stid) |
529d7b2a | 1189 | { |
6011695d | 1190 | struct nfs4_ol_stateid *stp = openlockstateid(stid); |
4665e2ba | 1191 | |
8287f009 | 1192 | put_clnt_odstate(stp->st_clnt_odstate); |
6011695d | 1193 | release_all_access(stp); |
d3134b10 JL |
1194 | if (stp->st_stateowner) |
1195 | nfs4_put_stateowner(stp->st_stateowner); | |
6011695d | 1196 | kmem_cache_free(stateid_slab, stid); |
529d7b2a BF |
1197 | } |
1198 | ||
b49e084d | 1199 | static void nfs4_free_lock_stateid(struct nfs4_stid *stid) |
529d7b2a | 1200 | { |
b49e084d JL |
1201 | struct nfs4_ol_stateid *stp = openlockstateid(stid); |
1202 | struct nfs4_lockowner *lo = lockowner(stp->st_stateowner); | |
529d7b2a BF |
1203 | struct file *file; |
1204 | ||
b49e084d JL |
1205 | file = find_any_file(stp->st_stid.sc_file); |
1206 | if (file) | |
1207 | filp_close(file, (fl_owner_t)lo); | |
1208 | nfs4_free_ol_stateid(stid); | |
1209 | } | |
1210 | ||
2c41beb0 JL |
1211 | /* |
1212 | * Put the persistent reference to an already unhashed generic stateid, while | |
1213 | * holding the cl_lock. If it's the last reference, then put it onto the | |
1214 | * reaplist for later destruction. | |
1215 | */ | |
1216 | static void put_ol_stateid_locked(struct nfs4_ol_stateid *stp, | |
1217 | struct list_head *reaplist) | |
1218 | { | |
1219 | struct nfs4_stid *s = &stp->st_stid; | |
1220 | struct nfs4_client *clp = s->sc_client; | |
1221 | ||
1222 | lockdep_assert_held(&clp->cl_lock); | |
1223 | ||
1224 | WARN_ON_ONCE(!list_empty(&stp->st_locks)); | |
1225 | ||
a15dfcd5 | 1226 | if (!refcount_dec_and_test(&s->sc_count)) { |
2c41beb0 JL |
1227 | wake_up_all(&close_wq); |
1228 | return; | |
1229 | } | |
1230 | ||
1231 | idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id); | |
1232 | list_add(&stp->st_locks, reaplist); | |
1233 | } | |
1234 | ||
e8568739 | 1235 | static bool unhash_lock_stateid(struct nfs4_ol_stateid *stp) |
b49e084d | 1236 | { |
f46c445b | 1237 | lockdep_assert_held(&stp->st_stid.sc_client->cl_lock); |
3c1c995c JL |
1238 | |
1239 | list_del_init(&stp->st_locks); | |
cd61c522 | 1240 | nfs4_unhash_stid(&stp->st_stid); |
e8568739 | 1241 | return unhash_ol_stateid(stp); |
3c1c995c JL |
1242 | } |
1243 | ||
1244 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) | |
1245 | { | |
f46c445b | 1246 | struct nfs4_client *clp = stp->st_stid.sc_client; |
e8568739 | 1247 | bool unhashed; |
3c1c995c | 1248 | |
f46c445b | 1249 | spin_lock(&clp->cl_lock); |
e8568739 | 1250 | unhashed = unhash_lock_stateid(stp); |
f46c445b | 1251 | spin_unlock(&clp->cl_lock); |
e8568739 JL |
1252 | if (unhashed) |
1253 | nfs4_put_stid(&stp->st_stid); | |
529d7b2a BF |
1254 | } |
1255 | ||
c58c6610 | 1256 | static void unhash_lockowner_locked(struct nfs4_lockowner *lo) |
8f4b54c5 | 1257 | { |
d4f0489f | 1258 | struct nfs4_client *clp = lo->lo_owner.so_client; |
c58c6610 | 1259 | |
d4f0489f | 1260 | lockdep_assert_held(&clp->cl_lock); |
c58c6610 | 1261 | |
8f4b54c5 JL |
1262 | list_del_init(&lo->lo_owner.so_strhash); |
1263 | } | |
1264 | ||
2c41beb0 JL |
1265 | /* |
1266 | * Free a list of generic stateids that were collected earlier after being | |
1267 | * fully unhashed. | |
1268 | */ | |
1269 | static void | |
1270 | free_ol_stateid_reaplist(struct list_head *reaplist) | |
1271 | { | |
1272 | struct nfs4_ol_stateid *stp; | |
fb94d766 | 1273 | struct nfs4_file *fp; |
2c41beb0 JL |
1274 | |
1275 | might_sleep(); | |
1276 | ||
1277 | while (!list_empty(reaplist)) { | |
1278 | stp = list_first_entry(reaplist, struct nfs4_ol_stateid, | |
1279 | st_locks); | |
1280 | list_del(&stp->st_locks); | |
fb94d766 | 1281 | fp = stp->st_stid.sc_file; |
2c41beb0 | 1282 | stp->st_stid.sc_free(&stp->st_stid); |
fb94d766 KM |
1283 | if (fp) |
1284 | put_nfs4_file(fp); | |
2c41beb0 JL |
1285 | } |
1286 | } | |
1287 | ||
d83017f9 JL |
1288 | static void release_open_stateid_locks(struct nfs4_ol_stateid *open_stp, |
1289 | struct list_head *reaplist) | |
3c87b9b7 TM |
1290 | { |
1291 | struct nfs4_ol_stateid *stp; | |
1292 | ||
e8568739 JL |
1293 | lockdep_assert_held(&open_stp->st_stid.sc_client->cl_lock); |
1294 | ||
3c87b9b7 TM |
1295 | while (!list_empty(&open_stp->st_locks)) { |
1296 | stp = list_entry(open_stp->st_locks.next, | |
1297 | struct nfs4_ol_stateid, st_locks); | |
e8568739 | 1298 | WARN_ON(!unhash_lock_stateid(stp)); |
d83017f9 | 1299 | put_ol_stateid_locked(stp, reaplist); |
529d7b2a BF |
1300 | } |
1301 | } | |
1302 | ||
e8568739 | 1303 | static bool unhash_open_stateid(struct nfs4_ol_stateid *stp, |
d83017f9 | 1304 | struct list_head *reaplist) |
2283963f | 1305 | { |
e8568739 JL |
1306 | bool unhashed; |
1307 | ||
2c41beb0 JL |
1308 | lockdep_assert_held(&stp->st_stid.sc_client->cl_lock); |
1309 | ||
e8568739 | 1310 | unhashed = unhash_ol_stateid(stp); |
d83017f9 | 1311 | release_open_stateid_locks(stp, reaplist); |
e8568739 | 1312 | return unhashed; |
38c387b5 BF |
1313 | } |
1314 | ||
1315 | static void release_open_stateid(struct nfs4_ol_stateid *stp) | |
1316 | { | |
2c41beb0 JL |
1317 | LIST_HEAD(reaplist); |
1318 | ||
1319 | spin_lock(&stp->st_stid.sc_client->cl_lock); | |
e8568739 JL |
1320 | if (unhash_open_stateid(stp, &reaplist)) |
1321 | put_ol_stateid_locked(stp, &reaplist); | |
2c41beb0 JL |
1322 | spin_unlock(&stp->st_stid.sc_client->cl_lock); |
1323 | free_ol_stateid_reaplist(&reaplist); | |
2283963f BF |
1324 | } |
1325 | ||
7ffb5880 | 1326 | static void unhash_openowner_locked(struct nfs4_openowner *oo) |
f1d110ca | 1327 | { |
d4f0489f | 1328 | struct nfs4_client *clp = oo->oo_owner.so_client; |
7ffb5880 | 1329 | |
d4f0489f | 1330 | lockdep_assert_held(&clp->cl_lock); |
7ffb5880 | 1331 | |
8f4b54c5 JL |
1332 | list_del_init(&oo->oo_owner.so_strhash); |
1333 | list_del_init(&oo->oo_perclient); | |
f1d110ca BF |
1334 | } |
1335 | ||
f7a4d872 BF |
1336 | static void release_last_closed_stateid(struct nfs4_openowner *oo) |
1337 | { | |
217526e7 JL |
1338 | struct nfsd_net *nn = net_generic(oo->oo_owner.so_client->net, |
1339 | nfsd_net_id); | |
1340 | struct nfs4_ol_stateid *s; | |
f7a4d872 | 1341 | |
217526e7 JL |
1342 | spin_lock(&nn->client_lock); |
1343 | s = oo->oo_last_closed_stid; | |
f7a4d872 | 1344 | if (s) { |
d3134b10 | 1345 | list_del_init(&oo->oo_close_lru); |
f7a4d872 BF |
1346 | oo->oo_last_closed_stid = NULL; |
1347 | } | |
217526e7 JL |
1348 | spin_unlock(&nn->client_lock); |
1349 | if (s) | |
1350 | nfs4_put_stid(&s->st_stid); | |
f7a4d872 BF |
1351 | } |
1352 | ||
2c41beb0 | 1353 | static void release_openowner(struct nfs4_openowner *oo) |
8f4b54c5 JL |
1354 | { |
1355 | struct nfs4_ol_stateid *stp; | |
d4f0489f | 1356 | struct nfs4_client *clp = oo->oo_owner.so_client; |
2c41beb0 | 1357 | struct list_head reaplist; |
7ffb5880 | 1358 | |
2c41beb0 | 1359 | INIT_LIST_HEAD(&reaplist); |
8f4b54c5 | 1360 | |
2c41beb0 JL |
1361 | spin_lock(&clp->cl_lock); |
1362 | unhash_openowner_locked(oo); | |
8f4b54c5 JL |
1363 | while (!list_empty(&oo->oo_owner.so_stateids)) { |
1364 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
1365 | struct nfs4_ol_stateid, st_perstateowner); | |
e8568739 JL |
1366 | if (unhash_open_stateid(stp, &reaplist)) |
1367 | put_ol_stateid_locked(stp, &reaplist); | |
8f4b54c5 | 1368 | } |
d4f0489f | 1369 | spin_unlock(&clp->cl_lock); |
2c41beb0 | 1370 | free_ol_stateid_reaplist(&reaplist); |
f7a4d872 | 1371 | release_last_closed_stateid(oo); |
6b180f0b | 1372 | nfs4_put_stateowner(&oo->oo_owner); |
f1d110ca BF |
1373 | } |
1374 | ||
5282fd72 ME |
1375 | static inline int |
1376 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
1377 | { | |
1378 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
1379 | ||
1380 | return sid->sequence % SESSION_HASH_SIZE; | |
1381 | } | |
1382 | ||
135dd002 | 1383 | #ifdef CONFIG_SUNRPC_DEBUG |
5282fd72 ME |
1384 | static inline void |
1385 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
1386 | { | |
1387 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
1388 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
1389 | } | |
8f199b82 TM |
1390 | #else |
1391 | static inline void | |
1392 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
1393 | { | |
1394 | } | |
1395 | #endif | |
1396 | ||
9411b1d4 BF |
1397 | /* |
1398 | * Bump the seqid on cstate->replay_owner, and clear replay_owner if it | |
1399 | * won't be used for replay. | |
1400 | */ | |
1401 | void nfsd4_bump_seqid(struct nfsd4_compound_state *cstate, __be32 nfserr) | |
1402 | { | |
1403 | struct nfs4_stateowner *so = cstate->replay_owner; | |
1404 | ||
1405 | if (nfserr == nfserr_replay_me) | |
1406 | return; | |
1407 | ||
1408 | if (!seqid_mutating_err(ntohl(nfserr))) { | |
58fb12e6 | 1409 | nfsd4_cstate_clear_replay(cstate); |
9411b1d4 BF |
1410 | return; |
1411 | } | |
1412 | if (!so) | |
1413 | return; | |
1414 | if (so->so_is_open_owner) | |
1415 | release_last_closed_stateid(openowner(so)); | |
1416 | so->so_seqid++; | |
1417 | return; | |
1418 | } | |
5282fd72 | 1419 | |
ec6b5d7b AA |
1420 | static void |
1421 | gen_sessionid(struct nfsd4_session *ses) | |
1422 | { | |
1423 | struct nfs4_client *clp = ses->se_client; | |
1424 | struct nfsd4_sessionid *sid; | |
1425 | ||
1426 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
1427 | sid->clientid = clp->cl_clientid; | |
1428 | sid->sequence = current_sessionid++; | |
1429 | sid->reserved = 0; | |
1430 | } | |
1431 | ||
1432 | /* | |
a649637c AA |
1433 | * The protocol defines ca_maxresponssize_cached to include the size of |
1434 | * the rpc header, but all we need to cache is the data starting after | |
1435 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
1436 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
1437 | * value that is the number of bytes in our cache plus a few additional | |
1438 | * bytes. In order to stay on the safe side, and not promise more than | |
1439 | * we can cache, those additional bytes must be the minimum possible: 24 | |
1440 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
1441 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
1442 | * for the SEQUENCE op response: | |
1443 | */ | |
1444 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
1445 | ||
557ce264 AA |
1446 | static void |
1447 | free_session_slots(struct nfsd4_session *ses) | |
1448 | { | |
1449 | int i; | |
1450 | ||
53da6a53 BF |
1451 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) { |
1452 | free_svc_cred(&ses->se_slots[i]->sl_cred); | |
557ce264 | 1453 | kfree(ses->se_slots[i]); |
53da6a53 | 1454 | } |
557ce264 AA |
1455 | } |
1456 | ||
a649637c | 1457 | /* |
efe0cb6d BF |
1458 | * We don't actually need to cache the rpc and session headers, so we |
1459 | * can allocate a little less for each slot: | |
1460 | */ | |
55c760cf | 1461 | static inline u32 slot_bytes(struct nfsd4_channel_attrs *ca) |
efe0cb6d | 1462 | { |
55c760cf | 1463 | u32 size; |
efe0cb6d | 1464 | |
55c760cf BF |
1465 | if (ca->maxresp_cached < NFSD_MIN_HDR_SEQ_SZ) |
1466 | size = 0; | |
1467 | else | |
1468 | size = ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
1469 | return size + sizeof(struct nfsd4_slot); | |
5b6feee9 | 1470 | } |
ec6b5d7b | 1471 | |
5b6feee9 BF |
1472 | /* |
1473 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c | 1474 | * re-negotiate active sessions and reduce their slot usage to make |
42b2aa86 | 1475 | * room for new connections. For now we just fail the create session. |
ec6b5d7b | 1476 | */ |
55c760cf | 1477 | static u32 nfsd4_get_drc_mem(struct nfsd4_channel_attrs *ca) |
ec6b5d7b | 1478 | { |
55c760cf BF |
1479 | u32 slotsize = slot_bytes(ca); |
1480 | u32 num = ca->maxreqs; | |
5b6feee9 | 1481 | int avail; |
ec6b5d7b | 1482 | |
5b6feee9 | 1483 | spin_lock(&nfsd_drc_lock); |
697ce9be ZY |
1484 | avail = min((unsigned long)NFSD_MAX_MEM_PER_SESSION, |
1485 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
de766e57 BF |
1486 | /* |
1487 | * Never use more than a third of the remaining memory, | |
1488 | * unless it's the only way to give this client a slot: | |
1489 | */ | |
1490 | avail = clamp_t(int, avail, slotsize, avail/3); | |
5b6feee9 BF |
1491 | num = min_t(int, num, avail / slotsize); |
1492 | nfsd_drc_mem_used += num * slotsize; | |
1493 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 1494 | |
5b6feee9 BF |
1495 | return num; |
1496 | } | |
ec6b5d7b | 1497 | |
55c760cf | 1498 | static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs *ca) |
5b6feee9 | 1499 | { |
55c760cf BF |
1500 | int slotsize = slot_bytes(ca); |
1501 | ||
4bd9b0f4 | 1502 | spin_lock(&nfsd_drc_lock); |
55c760cf | 1503 | nfsd_drc_mem_used -= slotsize * ca->maxreqs; |
4bd9b0f4 | 1504 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 1505 | } |
ec6b5d7b | 1506 | |
60810e54 KM |
1507 | static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fattrs, |
1508 | struct nfsd4_channel_attrs *battrs) | |
5b6feee9 | 1509 | { |
60810e54 KM |
1510 | int numslots = fattrs->maxreqs; |
1511 | int slotsize = slot_bytes(fattrs); | |
5b6feee9 BF |
1512 | struct nfsd4_session *new; |
1513 | int mem, i; | |
a649637c | 1514 | |
5b6feee9 BF |
1515 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
1516 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
1517 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 1518 | |
5b6feee9 BF |
1519 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
1520 | if (!new) | |
1521 | return NULL; | |
557ce264 | 1522 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 | 1523 | for (i = 0; i < numslots; i++) { |
55c760cf | 1524 | new->se_slots[i] = kzalloc(slotsize, GFP_KERNEL); |
5b6feee9 | 1525 | if (!new->se_slots[i]) |
557ce264 | 1526 | goto out_free; |
557ce264 | 1527 | } |
60810e54 KM |
1528 | |
1529 | memcpy(&new->se_fchannel, fattrs, sizeof(struct nfsd4_channel_attrs)); | |
1530 | memcpy(&new->se_bchannel, battrs, sizeof(struct nfsd4_channel_attrs)); | |
1531 | ||
5b6feee9 BF |
1532 | return new; |
1533 | out_free: | |
1534 | while (i--) | |
1535 | kfree(new->se_slots[i]); | |
1536 | kfree(new); | |
1537 | return NULL; | |
ec6b5d7b AA |
1538 | } |
1539 | ||
19cf5c02 BF |
1540 | static void free_conn(struct nfsd4_conn *c) |
1541 | { | |
1542 | svc_xprt_put(c->cn_xprt); | |
1543 | kfree(c); | |
1544 | } | |
ec6b5d7b | 1545 | |
19cf5c02 BF |
1546 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
1547 | { | |
1548 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
1549 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 1550 | |
19cf5c02 BF |
1551 | spin_lock(&clp->cl_lock); |
1552 | if (!list_empty(&c->cn_persession)) { | |
1553 | list_del(&c->cn_persession); | |
1554 | free_conn(c); | |
1555 | } | |
eea49806 | 1556 | nfsd4_probe_callback(clp); |
2e4b7239 | 1557 | spin_unlock(&clp->cl_lock); |
19cf5c02 | 1558 | } |
ec6b5d7b | 1559 | |
d29c374c | 1560 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 1561 | { |
c7662518 | 1562 | struct nfsd4_conn *conn; |
ec6b5d7b | 1563 | |
c7662518 BF |
1564 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
1565 | if (!conn) | |
db90681d | 1566 | return NULL; |
c7662518 BF |
1567 | svc_xprt_get(rqstp->rq_xprt); |
1568 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 1569 | conn->cn_flags = flags; |
db90681d BF |
1570 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
1571 | return conn; | |
1572 | } | |
a649637c | 1573 | |
328ead28 BF |
1574 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
1575 | { | |
1576 | conn->cn_session = ses; | |
1577 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
1578 | } |
1579 | ||
db90681d | 1580 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 1581 | { |
db90681d | 1582 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 1583 | |
c7662518 | 1584 | spin_lock(&clp->cl_lock); |
328ead28 | 1585 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 1586 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
1587 | } |
1588 | ||
21b75b01 | 1589 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 1590 | { |
19cf5c02 | 1591 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 1592 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
1593 | } |
1594 | ||
e1ff371f | 1595 | static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses) |
ec6b5d7b | 1596 | { |
21b75b01 | 1597 | int ret; |
ec6b5d7b | 1598 | |
db90681d | 1599 | nfsd4_hash_conn(conn, ses); |
21b75b01 BF |
1600 | ret = nfsd4_register_conn(conn); |
1601 | if (ret) | |
1602 | /* oops; xprt is already down: */ | |
1603 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
57a37144 BF |
1604 | /* We may have gained or lost a callback channel: */ |
1605 | nfsd4_probe_callback_sync(ses->se_client); | |
c7662518 | 1606 | } |
ec6b5d7b | 1607 | |
e1ff371f | 1608 | static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses) |
1d1bc8f2 BF |
1609 | { |
1610 | u32 dir = NFS4_CDFC4_FORE; | |
1611 | ||
e1ff371f | 1612 | if (cses->flags & SESSION4_BACK_CHAN) |
1d1bc8f2 | 1613 | dir |= NFS4_CDFC4_BACK; |
e1ff371f | 1614 | return alloc_conn(rqstp, dir); |
1d1bc8f2 BF |
1615 | } |
1616 | ||
1617 | /* must be called under client_lock */ | |
19cf5c02 | 1618 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 1619 | { |
19cf5c02 BF |
1620 | struct nfs4_client *clp = s->se_client; |
1621 | struct nfsd4_conn *c; | |
ec6b5d7b | 1622 | |
19cf5c02 BF |
1623 | spin_lock(&clp->cl_lock); |
1624 | while (!list_empty(&s->se_conns)) { | |
1625 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
1626 | list_del_init(&c->cn_persession); | |
1627 | spin_unlock(&clp->cl_lock); | |
557ce264 | 1628 | |
19cf5c02 BF |
1629 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
1630 | free_conn(c); | |
ec6b5d7b | 1631 | |
19cf5c02 BF |
1632 | spin_lock(&clp->cl_lock); |
1633 | } | |
1634 | spin_unlock(&clp->cl_lock); | |
c7662518 | 1635 | } |
ec6b5d7b | 1636 | |
1377b69e BF |
1637 | static void __free_session(struct nfsd4_session *ses) |
1638 | { | |
1377b69e BF |
1639 | free_session_slots(ses); |
1640 | kfree(ses); | |
1641 | } | |
1642 | ||
66b2b9b2 | 1643 | static void free_session(struct nfsd4_session *ses) |
c7662518 | 1644 | { |
19cf5c02 | 1645 | nfsd4_del_conns(ses); |
55c760cf | 1646 | nfsd4_put_drc_mem(&ses->se_fchannel); |
1377b69e | 1647 | __free_session(ses); |
c7662518 BF |
1648 | } |
1649 | ||
135ae827 | 1650 | static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
a827bcb2 | 1651 | { |
a827bcb2 | 1652 | int idx; |
1872de0e | 1653 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
a827bcb2 | 1654 | |
ec6b5d7b AA |
1655 | new->se_client = clp; |
1656 | gen_sessionid(new); | |
ec6b5d7b | 1657 | |
c7662518 BF |
1658 | INIT_LIST_HEAD(&new->se_conns); |
1659 | ||
ac7c46f2 | 1660 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 1661 | new->se_flags = cses->flags; |
8b5ce5cd | 1662 | new->se_cb_prog = cses->callback_prog; |
c6bb3ca2 | 1663 | new->se_cb_sec = cses->cb_sec; |
66b2b9b2 | 1664 | atomic_set(&new->se_ref, 0); |
5b6feee9 | 1665 | idx = hash_sessionid(&new->se_sessionid); |
1872de0e | 1666 | list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]); |
4c649378 | 1667 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 1668 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 1669 | spin_unlock(&clp->cl_lock); |
60810e54 | 1670 | |
b0d2e42c | 1671 | { |
edd76786 | 1672 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
1673 | /* |
1674 | * This is a little silly; with sessions there's no real | |
1675 | * use for the callback address. Use the peer address | |
1676 | * as a reasonable default for now, but consider fixing | |
1677 | * the rpc client not to require an address in the | |
1678 | * future: | |
1679 | */ | |
edd76786 BF |
1680 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
1681 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 1682 | } |
ec6b5d7b AA |
1683 | } |
1684 | ||
9089f1b4 | 1685 | /* caller must hold client_lock */ |
5282fd72 | 1686 | static struct nfsd4_session * |
d4e19e70 | 1687 | __find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net) |
5282fd72 ME |
1688 | { |
1689 | struct nfsd4_session *elem; | |
1690 | int idx; | |
1872de0e | 1691 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
5282fd72 | 1692 | |
0a880a28 TM |
1693 | lockdep_assert_held(&nn->client_lock); |
1694 | ||
5282fd72 ME |
1695 | dump_sessionid(__func__, sessionid); |
1696 | idx = hash_sessionid(sessionid); | |
5282fd72 | 1697 | /* Search in the appropriate list */ |
1872de0e | 1698 | list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) { |
5282fd72 ME |
1699 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
1700 | NFS4_MAX_SESSIONID_LEN)) { | |
1701 | return elem; | |
1702 | } | |
1703 | } | |
1704 | ||
1705 | dprintk("%s: session not found\n", __func__); | |
1706 | return NULL; | |
1707 | } | |
1708 | ||
d4e19e70 TM |
1709 | static struct nfsd4_session * |
1710 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net, | |
1711 | __be32 *ret) | |
1712 | { | |
1713 | struct nfsd4_session *session; | |
1714 | __be32 status = nfserr_badsession; | |
1715 | ||
1716 | session = __find_in_sessionid_hashtbl(sessionid, net); | |
1717 | if (!session) | |
1718 | goto out; | |
1719 | status = nfsd4_get_session_locked(session); | |
1720 | if (status) | |
1721 | session = NULL; | |
1722 | out: | |
1723 | *ret = status; | |
1724 | return session; | |
1725 | } | |
1726 | ||
9089f1b4 | 1727 | /* caller must hold client_lock */ |
7116ed6b | 1728 | static void |
5282fd72 | 1729 | unhash_session(struct nfsd4_session *ses) |
7116ed6b | 1730 | { |
0a880a28 TM |
1731 | struct nfs4_client *clp = ses->se_client; |
1732 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
1733 | ||
1734 | lockdep_assert_held(&nn->client_lock); | |
1735 | ||
7116ed6b | 1736 | list_del(&ses->se_hash); |
4c649378 | 1737 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 1738 | list_del(&ses->se_perclnt); |
4c649378 | 1739 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
1740 | } |
1741 | ||
1da177e4 LT |
1742 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
1743 | static int | |
2c142baa | 1744 | STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn) |
1da177e4 | 1745 | { |
bbc7f33a BF |
1746 | /* |
1747 | * We're assuming the clid was not given out from a boot | |
1748 | * precisely 2^32 (about 136 years) before this one. That seems | |
1749 | * a safe assumption: | |
1750 | */ | |
1751 | if (clid->cl_boot == (u32)nn->boot_time) | |
1da177e4 | 1752 | return 0; |
60adfc50 | 1753 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
2c142baa | 1754 | clid->cl_boot, clid->cl_id, nn->boot_time); |
1da177e4 LT |
1755 | return 1; |
1756 | } | |
1757 | ||
1758 | /* | |
1759 | * XXX Should we use a slab cache ? | |
1760 | * This type of memory management is somewhat inefficient, but we use it | |
1761 | * anyway since SETCLIENTID is not a common operation. | |
1762 | */ | |
35bba9a3 | 1763 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
1764 | { |
1765 | struct nfs4_client *clp; | |
d4f0489f | 1766 | int i; |
1da177e4 | 1767 | |
35bba9a3 BF |
1768 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
1769 | if (clp == NULL) | |
1770 | return NULL; | |
67114fe6 | 1771 | clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); |
d4f0489f TM |
1772 | if (clp->cl_name.data == NULL) |
1773 | goto err_no_name; | |
1774 | clp->cl_ownerstr_hashtbl = kmalloc(sizeof(struct list_head) * | |
1775 | OWNER_HASH_SIZE, GFP_KERNEL); | |
1776 | if (!clp->cl_ownerstr_hashtbl) | |
1777 | goto err_no_hashtbl; | |
1778 | for (i = 0; i < OWNER_HASH_SIZE; i++) | |
1779 | INIT_LIST_HEAD(&clp->cl_ownerstr_hashtbl[i]); | |
35bba9a3 | 1780 | clp->cl_name.len = name.len; |
5694c93e TM |
1781 | INIT_LIST_HEAD(&clp->cl_sessions); |
1782 | idr_init(&clp->cl_stateids); | |
1783 | atomic_set(&clp->cl_refcount, 0); | |
1784 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; | |
1785 | INIT_LIST_HEAD(&clp->cl_idhash); | |
1786 | INIT_LIST_HEAD(&clp->cl_openowners); | |
1787 | INIT_LIST_HEAD(&clp->cl_delegations); | |
1788 | INIT_LIST_HEAD(&clp->cl_lru); | |
5694c93e | 1789 | INIT_LIST_HEAD(&clp->cl_revoked); |
9cf514cc CH |
1790 | #ifdef CONFIG_NFSD_PNFS |
1791 | INIT_LIST_HEAD(&clp->cl_lo_states); | |
1792 | #endif | |
5694c93e TM |
1793 | spin_lock_init(&clp->cl_lock); |
1794 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1da177e4 | 1795 | return clp; |
d4f0489f TM |
1796 | err_no_hashtbl: |
1797 | kfree(clp->cl_name.data); | |
1798 | err_no_name: | |
1799 | kfree(clp); | |
1800 | return NULL; | |
1da177e4 LT |
1801 | } |
1802 | ||
4dd86e15 | 1803 | static void |
1da177e4 LT |
1804 | free_client(struct nfs4_client *clp) |
1805 | { | |
792c95dd BF |
1806 | while (!list_empty(&clp->cl_sessions)) { |
1807 | struct nfsd4_session *ses; | |
1808 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
1809 | se_perclnt); | |
1810 | list_del(&ses->se_perclnt); | |
66b2b9b2 BF |
1811 | WARN_ON_ONCE(atomic_read(&ses->se_ref)); |
1812 | free_session(ses); | |
792c95dd | 1813 | } |
4cb57e30 | 1814 | rpc_destroy_wait_queue(&clp->cl_cb_waitq); |
03a4e1f6 | 1815 | free_svc_cred(&clp->cl_cred); |
d4f0489f | 1816 | kfree(clp->cl_ownerstr_hashtbl); |
1da177e4 | 1817 | kfree(clp->cl_name.data); |
2d32b29a | 1818 | idr_destroy(&clp->cl_stateids); |
1da177e4 LT |
1819 | kfree(clp); |
1820 | } | |
1821 | ||
84d38ac9 | 1822 | /* must be called under the client_lock */ |
4beb345b | 1823 | static void |
84d38ac9 BH |
1824 | unhash_client_locked(struct nfs4_client *clp) |
1825 | { | |
4beb345b | 1826 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
792c95dd BF |
1827 | struct nfsd4_session *ses; |
1828 | ||
0a880a28 TM |
1829 | lockdep_assert_held(&nn->client_lock); |
1830 | ||
4beb345b TM |
1831 | /* Mark the client as expired! */ |
1832 | clp->cl_time = 0; | |
1833 | /* Make it invisible */ | |
1834 | if (!list_empty(&clp->cl_idhash)) { | |
1835 | list_del_init(&clp->cl_idhash); | |
1836 | if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) | |
1837 | rb_erase(&clp->cl_namenode, &nn->conf_name_tree); | |
1838 | else | |
1839 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); | |
1840 | } | |
1841 | list_del_init(&clp->cl_lru); | |
4c649378 | 1842 | spin_lock(&clp->cl_lock); |
792c95dd BF |
1843 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
1844 | list_del_init(&ses->se_hash); | |
4c649378 | 1845 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
1846 | } |
1847 | ||
1da177e4 | 1848 | static void |
4beb345b TM |
1849 | unhash_client(struct nfs4_client *clp) |
1850 | { | |
1851 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
1852 | ||
1853 | spin_lock(&nn->client_lock); | |
1854 | unhash_client_locked(clp); | |
1855 | spin_unlock(&nn->client_lock); | |
1856 | } | |
1857 | ||
97403d95 JL |
1858 | static __be32 mark_client_expired_locked(struct nfs4_client *clp) |
1859 | { | |
1860 | if (atomic_read(&clp->cl_refcount)) | |
1861 | return nfserr_jukebox; | |
1862 | unhash_client_locked(clp); | |
1863 | return nfs_ok; | |
1864 | } | |
1865 | ||
4beb345b TM |
1866 | static void |
1867 | __destroy_client(struct nfs4_client *clp) | |
1da177e4 | 1868 | { |
fe0750e5 | 1869 | struct nfs4_openowner *oo; |
1da177e4 | 1870 | struct nfs4_delegation *dp; |
1da177e4 LT |
1871 | struct list_head reaplist; |
1872 | ||
1da177e4 | 1873 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 1874 | spin_lock(&state_lock); |
ea1da636 N |
1875 | while (!list_empty(&clp->cl_delegations)) { |
1876 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
3fcbbd24 | 1877 | WARN_ON(!unhash_delegation_locked(dp)); |
42690676 | 1878 | list_add(&dp->dl_recall_lru, &reaplist); |
1da177e4 | 1879 | } |
cdc97505 | 1880 | spin_unlock(&state_lock); |
1da177e4 LT |
1881 | while (!list_empty(&reaplist)) { |
1882 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
42690676 | 1883 | list_del_init(&dp->dl_recall_lru); |
8287f009 | 1884 | put_clnt_odstate(dp->dl_clnt_odstate); |
afbda402 | 1885 | nfs4_put_deleg_lease(dp->dl_stid.sc_file); |
6011695d | 1886 | nfs4_put_stid(&dp->dl_stid); |
1da177e4 | 1887 | } |
2d4a532d | 1888 | while (!list_empty(&clp->cl_revoked)) { |
c876486b | 1889 | dp = list_entry(clp->cl_revoked.next, struct nfs4_delegation, dl_recall_lru); |
2d4a532d | 1890 | list_del_init(&dp->dl_recall_lru); |
6011695d | 1891 | nfs4_put_stid(&dp->dl_stid); |
956c4fee | 1892 | } |
ea1da636 | 1893 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 | 1894 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
b5971afa | 1895 | nfs4_get_stateowner(&oo->oo_owner); |
fe0750e5 | 1896 | release_openowner(oo); |
1da177e4 | 1897 | } |
9cf514cc | 1898 | nfsd4_return_all_client_layouts(clp); |
6ff8da08 | 1899 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
1900 | if (clp->cl_cb_conn.cb_xprt) |
1901 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
221a6876 | 1902 | free_client(clp); |
1da177e4 LT |
1903 | } |
1904 | ||
4beb345b TM |
1905 | static void |
1906 | destroy_client(struct nfs4_client *clp) | |
1907 | { | |
1908 | unhash_client(clp); | |
1909 | __destroy_client(clp); | |
1910 | } | |
1911 | ||
0d22f68f BF |
1912 | static void expire_client(struct nfs4_client *clp) |
1913 | { | |
4beb345b | 1914 | unhash_client(clp); |
0d22f68f | 1915 | nfsd4_client_record_remove(clp); |
4beb345b | 1916 | __destroy_client(clp); |
0d22f68f BF |
1917 | } |
1918 | ||
35bba9a3 BF |
1919 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
1920 | { | |
1921 | memcpy(target->cl_verifier.data, source->data, | |
1922 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
1923 | } |
1924 | ||
35bba9a3 BF |
1925 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
1926 | { | |
1da177e4 LT |
1927 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
1928 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
1929 | } | |
1930 | ||
50043859 BF |
1931 | static int copy_cred(struct svc_cred *target, struct svc_cred *source) |
1932 | { | |
2f10fdcb N |
1933 | target->cr_principal = kstrdup(source->cr_principal, GFP_KERNEL); |
1934 | target->cr_raw_principal = kstrdup(source->cr_raw_principal, | |
1935 | GFP_KERNEL); | |
1936 | if ((source->cr_principal && ! target->cr_principal) || | |
1937 | (source->cr_raw_principal && ! target->cr_raw_principal)) | |
1938 | return -ENOMEM; | |
50043859 | 1939 | |
d5497fc6 | 1940 | target->cr_flavor = source->cr_flavor; |
1da177e4 LT |
1941 | target->cr_uid = source->cr_uid; |
1942 | target->cr_gid = source->cr_gid; | |
1943 | target->cr_group_info = source->cr_group_info; | |
1944 | get_group_info(target->cr_group_info); | |
0dc1531a BF |
1945 | target->cr_gss_mech = source->cr_gss_mech; |
1946 | if (source->cr_gss_mech) | |
1947 | gss_mech_get(source->cr_gss_mech); | |
03a4e1f6 | 1948 | return 0; |
1da177e4 LT |
1949 | } |
1950 | ||
ef17af2a | 1951 | static int |
ac55fdc4 JL |
1952 | compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2) |
1953 | { | |
ef17af2a RV |
1954 | if (o1->len < o2->len) |
1955 | return -1; | |
1956 | if (o1->len > o2->len) | |
1957 | return 1; | |
1958 | return memcmp(o1->data, o2->data, o1->len); | |
ac55fdc4 JL |
1959 | } |
1960 | ||
35bba9a3 | 1961 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 1962 | { |
a55370a3 | 1963 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
1964 | } |
1965 | ||
1966 | static int | |
599e0a22 BF |
1967 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1968 | { | |
1969 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
1970 | } |
1971 | ||
1972 | static int | |
599e0a22 BF |
1973 | same_clid(clientid_t *cl1, clientid_t *cl2) |
1974 | { | |
1975 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1976 | } |
1977 | ||
8fbba96e BF |
1978 | static bool groups_equal(struct group_info *g1, struct group_info *g2) |
1979 | { | |
1980 | int i; | |
1981 | ||
1982 | if (g1->ngroups != g2->ngroups) | |
1983 | return false; | |
1984 | for (i=0; i<g1->ngroups; i++) | |
81243eac | 1985 | if (!gid_eq(g1->gid[i], g2->gid[i])) |
8fbba96e BF |
1986 | return false; |
1987 | return true; | |
1988 | } | |
1989 | ||
68eb3508 BF |
1990 | /* |
1991 | * RFC 3530 language requires clid_inuse be returned when the | |
1992 | * "principal" associated with a requests differs from that previously | |
1993 | * used. We use uid, gid's, and gss principal string as our best | |
1994 | * approximation. We also don't want to allow non-gss use of a client | |
1995 | * established using gss: in theory cr_principal should catch that | |
1996 | * change, but in practice cr_principal can be null even in the gss case | |
1997 | * since gssd doesn't always pass down a principal string. | |
1998 | */ | |
1999 | static bool is_gss_cred(struct svc_cred *cr) | |
2000 | { | |
2001 | /* Is cr_flavor one of the gss "pseudoflavors"?: */ | |
2002 | return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR); | |
2003 | } | |
2004 | ||
2005 | ||
5559b50a | 2006 | static bool |
599e0a22 BF |
2007 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
2008 | { | |
68eb3508 | 2009 | if ((is_gss_cred(cr1) != is_gss_cred(cr2)) |
6fab8779 EB |
2010 | || (!uid_eq(cr1->cr_uid, cr2->cr_uid)) |
2011 | || (!gid_eq(cr1->cr_gid, cr2->cr_gid)) | |
8fbba96e BF |
2012 | || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) |
2013 | return false; | |
2014 | if (cr1->cr_principal == cr2->cr_principal) | |
2015 | return true; | |
2016 | if (!cr1->cr_principal || !cr2->cr_principal) | |
2017 | return false; | |
5559b50a | 2018 | return 0 == strcmp(cr1->cr_principal, cr2->cr_principal); |
1da177e4 LT |
2019 | } |
2020 | ||
57266a6e BF |
2021 | static bool svc_rqst_integrity_protected(struct svc_rqst *rqstp) |
2022 | { | |
2023 | struct svc_cred *cr = &rqstp->rq_cred; | |
2024 | u32 service; | |
2025 | ||
c4720591 BF |
2026 | if (!cr->cr_gss_mech) |
2027 | return false; | |
57266a6e BF |
2028 | service = gss_pseudoflavor_to_service(cr->cr_gss_mech, cr->cr_flavor); |
2029 | return service == RPC_GSS_SVC_INTEGRITY || | |
2030 | service == RPC_GSS_SVC_PRIVACY; | |
2031 | } | |
2032 | ||
dedeb13f | 2033 | bool nfsd4_mach_creds_match(struct nfs4_client *cl, struct svc_rqst *rqstp) |
57266a6e BF |
2034 | { |
2035 | struct svc_cred *cr = &rqstp->rq_cred; | |
2036 | ||
2037 | if (!cl->cl_mach_cred) | |
2038 | return true; | |
2039 | if (cl->cl_cred.cr_gss_mech != cr->cr_gss_mech) | |
2040 | return false; | |
2041 | if (!svc_rqst_integrity_protected(rqstp)) | |
2042 | return false; | |
414ca017 BF |
2043 | if (cl->cl_cred.cr_raw_principal) |
2044 | return 0 == strcmp(cl->cl_cred.cr_raw_principal, | |
2045 | cr->cr_raw_principal); | |
57266a6e BF |
2046 | if (!cr->cr_principal) |
2047 | return false; | |
2048 | return 0 == strcmp(cl->cl_cred.cr_principal, cr->cr_principal); | |
2049 | } | |
2050 | ||
294ac32e | 2051 | static void gen_confirm(struct nfs4_client *clp, struct nfsd_net *nn) |
deda2faa | 2052 | { |
ab4684d1 | 2053 | __be32 verf[2]; |
1da177e4 | 2054 | |
f419992c JL |
2055 | /* |
2056 | * This is opaque to client, so no need to byte-swap. Use | |
2057 | * __force to keep sparse happy | |
2058 | */ | |
2059 | verf[0] = (__force __be32)get_seconds(); | |
19311aa8 | 2060 | verf[1] = (__force __be32)nn->clverifier_counter++; |
ab4684d1 | 2061 | memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); |
1da177e4 LT |
2062 | } |
2063 | ||
294ac32e JL |
2064 | static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn) |
2065 | { | |
2066 | clp->cl_clientid.cl_boot = nn->boot_time; | |
2067 | clp->cl_clientid.cl_id = nn->clientid_counter++; | |
2068 | gen_confirm(clp, nn); | |
2069 | } | |
2070 | ||
4770d722 JL |
2071 | static struct nfs4_stid * |
2072 | find_stateid_locked(struct nfs4_client *cl, stateid_t *t) | |
4581d140 | 2073 | { |
3abdb607 BF |
2074 | struct nfs4_stid *ret; |
2075 | ||
2076 | ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id); | |
2077 | if (!ret || !ret->sc_type) | |
2078 | return NULL; | |
2079 | return ret; | |
4d71ab87 BF |
2080 | } |
2081 | ||
4770d722 JL |
2082 | static struct nfs4_stid * |
2083 | find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) | |
f459e453 BF |
2084 | { |
2085 | struct nfs4_stid *s; | |
4d71ab87 | 2086 | |
4770d722 JL |
2087 | spin_lock(&cl->cl_lock); |
2088 | s = find_stateid_locked(cl, t); | |
2d3f9668 TM |
2089 | if (s != NULL) { |
2090 | if (typemask & s->sc_type) | |
a15dfcd5 | 2091 | refcount_inc(&s->sc_count); |
2d3f9668 TM |
2092 | else |
2093 | s = NULL; | |
2094 | } | |
4770d722 JL |
2095 | spin_unlock(&cl->cl_lock); |
2096 | return s; | |
4581d140 BF |
2097 | } |
2098 | ||
2216d449 | 2099 | static struct nfs4_client *create_client(struct xdr_netobj name, |
b09333c4 RL |
2100 | struct svc_rqst *rqstp, nfs4_verifier *verf) |
2101 | { | |
2102 | struct nfs4_client *clp; | |
2103 | struct sockaddr *sa = svc_addr(rqstp); | |
03a4e1f6 | 2104 | int ret; |
c212cecf | 2105 | struct net *net = SVC_NET(rqstp); |
b09333c4 RL |
2106 | |
2107 | clp = alloc_client(name); | |
2108 | if (clp == NULL) | |
2109 | return NULL; | |
2110 | ||
03a4e1f6 BF |
2111 | ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); |
2112 | if (ret) { | |
03a4e1f6 | 2113 | free_client(clp); |
03a4e1f6 | 2114 | return NULL; |
b09333c4 | 2115 | } |
0162ac2b | 2116 | nfsd4_init_cb(&clp->cl_cb_null, clp, NULL, NFSPROC4_CLNT_CB_NULL); |
07cd4909 | 2117 | clp->cl_time = get_seconds(); |
b09333c4 | 2118 | clear_bit(0, &clp->cl_cb_slot_busy); |
b09333c4 RL |
2119 | copy_verf(clp, verf); |
2120 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
edd76786 | 2121 | clp->cl_cb_session = NULL; |
c212cecf | 2122 | clp->net = net; |
b09333c4 RL |
2123 | return clp; |
2124 | } | |
2125 | ||
fd39ca9a | 2126 | static void |
ac55fdc4 JL |
2127 | add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root) |
2128 | { | |
2129 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
2130 | struct nfs4_client *clp; | |
2131 | ||
2132 | while (*new) { | |
2133 | clp = rb_entry(*new, struct nfs4_client, cl_namenode); | |
2134 | parent = *new; | |
2135 | ||
2136 | if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0) | |
2137 | new = &((*new)->rb_left); | |
2138 | else | |
2139 | new = &((*new)->rb_right); | |
2140 | } | |
2141 | ||
2142 | rb_link_node(&new_clp->cl_namenode, parent, new); | |
2143 | rb_insert_color(&new_clp->cl_namenode, root); | |
2144 | } | |
2145 | ||
2146 | static struct nfs4_client * | |
2147 | find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root) | |
2148 | { | |
ef17af2a | 2149 | int cmp; |
ac55fdc4 JL |
2150 | struct rb_node *node = root->rb_node; |
2151 | struct nfs4_client *clp; | |
2152 | ||
2153 | while (node) { | |
2154 | clp = rb_entry(node, struct nfs4_client, cl_namenode); | |
2155 | cmp = compare_blob(&clp->cl_name, name); | |
2156 | if (cmp > 0) | |
2157 | node = node->rb_left; | |
2158 | else if (cmp < 0) | |
2159 | node = node->rb_right; | |
2160 | else | |
2161 | return clp; | |
2162 | } | |
2163 | return NULL; | |
2164 | } | |
2165 | ||
2166 | static void | |
2167 | add_to_unconfirmed(struct nfs4_client *clp) | |
1da177e4 LT |
2168 | { |
2169 | unsigned int idhashval; | |
0a7ec377 | 2170 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 2171 | |
0a880a28 TM |
2172 | lockdep_assert_held(&nn->client_lock); |
2173 | ||
ac55fdc4 | 2174 | clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
a99454aa | 2175 | add_clp_to_name_tree(clp, &nn->unconf_name_tree); |
1da177e4 | 2176 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
0a7ec377 | 2177 | list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]); |
3dbacee6 | 2178 | renew_client_locked(clp); |
1da177e4 LT |
2179 | } |
2180 | ||
fd39ca9a | 2181 | static void |
1da177e4 LT |
2182 | move_to_confirmed(struct nfs4_client *clp) |
2183 | { | |
2184 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
8daae4dc | 2185 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 2186 | |
0a880a28 TM |
2187 | lockdep_assert_held(&nn->client_lock); |
2188 | ||
1da177e4 | 2189 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); |
8daae4dc | 2190 | list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]); |
a99454aa | 2191 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
382a62e7 | 2192 | add_clp_to_name_tree(clp, &nn->conf_name_tree); |
ac55fdc4 | 2193 | set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
3dbacee6 | 2194 | renew_client_locked(clp); |
1da177e4 LT |
2195 | } |
2196 | ||
2197 | static struct nfs4_client * | |
bfa85e83 | 2198 | find_client_in_id_table(struct list_head *tbl, clientid_t *clid, bool sessions) |
1da177e4 LT |
2199 | { |
2200 | struct nfs4_client *clp; | |
2201 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
2202 | ||
bfa85e83 | 2203 | list_for_each_entry(clp, &tbl[idhashval], cl_idhash) { |
a50d2ad1 | 2204 | if (same_clid(&clp->cl_clientid, clid)) { |
d15c077e BF |
2205 | if ((bool)clp->cl_minorversion != sessions) |
2206 | return NULL; | |
3dbacee6 | 2207 | renew_client_locked(clp); |
1da177e4 | 2208 | return clp; |
a50d2ad1 | 2209 | } |
1da177e4 LT |
2210 | } |
2211 | return NULL; | |
2212 | } | |
2213 | ||
bfa85e83 BF |
2214 | static struct nfs4_client * |
2215 | find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) | |
2216 | { | |
2217 | struct list_head *tbl = nn->conf_id_hashtbl; | |
2218 | ||
0a880a28 | 2219 | lockdep_assert_held(&nn->client_lock); |
bfa85e83 BF |
2220 | return find_client_in_id_table(tbl, clid, sessions); |
2221 | } | |
2222 | ||
1da177e4 | 2223 | static struct nfs4_client * |
0a7ec377 | 2224 | find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
1da177e4 | 2225 | { |
bfa85e83 | 2226 | struct list_head *tbl = nn->unconf_id_hashtbl; |
1da177e4 | 2227 | |
0a880a28 | 2228 | lockdep_assert_held(&nn->client_lock); |
bfa85e83 | 2229 | return find_client_in_id_table(tbl, clid, sessions); |
1da177e4 LT |
2230 | } |
2231 | ||
6e5f15c9 | 2232 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 2233 | { |
6e5f15c9 | 2234 | return clp->cl_exchange_flags != 0; |
e203d506 | 2235 | } |
a1bcecd2 | 2236 | |
28ce6054 | 2237 | static struct nfs4_client * |
382a62e7 | 2238 | find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 2239 | { |
0a880a28 | 2240 | lockdep_assert_held(&nn->client_lock); |
382a62e7 | 2241 | return find_clp_in_name_tree(name, &nn->conf_name_tree); |
28ce6054 N |
2242 | } |
2243 | ||
2244 | static struct nfs4_client * | |
a99454aa | 2245 | find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 2246 | { |
0a880a28 | 2247 | lockdep_assert_held(&nn->client_lock); |
a99454aa | 2248 | return find_clp_in_name_tree(name, &nn->unconf_name_tree); |
28ce6054 N |
2249 | } |
2250 | ||
fd39ca9a | 2251 | static void |
6f3d772f | 2252 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 2253 | { |
07263f1e | 2254 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
2255 | struct sockaddr *sa = svc_addr(rqstp); |
2256 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
2257 | unsigned short expected_family; |
2258 | ||
2259 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
2260 | if (se->se_callback_netid_len == 3 && | |
2261 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
2262 | expected_family = AF_INET; | |
2263 | else if (se->se_callback_netid_len == 4 && | |
2264 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
2265 | expected_family = AF_INET6; | |
2266 | else | |
1da177e4 LT |
2267 | goto out_err; |
2268 | ||
c212cecf | 2269 | conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val, |
aa9a4ec7 | 2270 | se->se_callback_addr_len, |
07263f1e BF |
2271 | (struct sockaddr *)&conn->cb_addr, |
2272 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 2273 | |
07263f1e | 2274 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 2275 | goto out_err; |
aa9a4ec7 | 2276 | |
07263f1e BF |
2277 | if (conn->cb_addr.ss_family == AF_INET6) |
2278 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 2279 | |
07263f1e BF |
2280 | conn->cb_prog = se->se_callback_prog; |
2281 | conn->cb_ident = se->se_callback_ident; | |
849a1cf1 | 2282 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
1da177e4 LT |
2283 | return; |
2284 | out_err: | |
07263f1e BF |
2285 | conn->cb_addr.ss_family = AF_UNSPEC; |
2286 | conn->cb_addrlen = 0; | |
4ab495bf | 2287 | dprintk("NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
2288 | "will not receive delegations\n", |
2289 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
2290 | ||
1da177e4 LT |
2291 | return; |
2292 | } | |
2293 | ||
074fe897 | 2294 | /* |
067e1ace | 2295 | * Cache a reply. nfsd4_check_resp_size() has bounded the cache size. |
074fe897 | 2296 | */ |
b607664e | 2297 | static void |
074fe897 | 2298 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) |
074fe897 | 2299 | { |
f5236013 | 2300 | struct xdr_buf *buf = resp->xdr.buf; |
557ce264 AA |
2301 | struct nfsd4_slot *slot = resp->cstate.slot; |
2302 | unsigned int base; | |
074fe897 | 2303 | |
557ce264 | 2304 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 2305 | |
085def3a | 2306 | slot->sl_flags |= NFSD4_SLOT_INITIALIZED; |
557ce264 AA |
2307 | slot->sl_opcnt = resp->opcnt; |
2308 | slot->sl_status = resp->cstate.status; | |
53da6a53 BF |
2309 | free_svc_cred(&slot->sl_cred); |
2310 | copy_cred(&slot->sl_cred, &resp->rqstp->rq_cred); | |
074fe897 | 2311 | |
085def3a BF |
2312 | if (!nfsd4_cache_this(resp)) { |
2313 | slot->sl_flags &= ~NFSD4_SLOT_CACHED; | |
bf864a31 | 2314 | return; |
074fe897 | 2315 | } |
085def3a BF |
2316 | slot->sl_flags |= NFSD4_SLOT_CACHED; |
2317 | ||
f5236013 BF |
2318 | base = resp->cstate.data_offset; |
2319 | slot->sl_datalen = buf->len - base; | |
2320 | if (read_bytes_from_xdr_buf(buf, base, slot->sl_data, slot->sl_datalen)) | |
d3f03403 DC |
2321 | WARN(1, "%s: sessions DRC could not cache compound\n", |
2322 | __func__); | |
557ce264 | 2323 | return; |
074fe897 AA |
2324 | } |
2325 | ||
2326 | /* | |
abfabf8c AA |
2327 | * Encode the replay sequence operation from the slot values. |
2328 | * If cachethis is FALSE encode the uncached rep error on the next | |
2329 | * operation which sets resp->p and increments resp->opcnt for | |
2330 | * nfs4svc_encode_compoundres. | |
074fe897 | 2331 | * |
074fe897 | 2332 | */ |
abfabf8c AA |
2333 | static __be32 |
2334 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
2335 | struct nfsd4_compoundres *resp) | |
074fe897 | 2336 | { |
abfabf8c AA |
2337 | struct nfsd4_op *op; |
2338 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 2339 | |
abfabf8c AA |
2340 | /* Encode the replayed sequence operation */ |
2341 | op = &args->ops[resp->opcnt - 1]; | |
2342 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 2343 | |
085def3a BF |
2344 | if (slot->sl_flags & NFSD4_SLOT_CACHED) |
2345 | return op->status; | |
2346 | if (args->opcnt == 1) { | |
2347 | /* | |
2348 | * The original operation wasn't a solo sequence--we | |
2349 | * always cache those--so this retry must not match the | |
2350 | * original: | |
2351 | */ | |
2352 | op->status = nfserr_seq_false_retry; | |
2353 | } else { | |
abfabf8c AA |
2354 | op = &args->ops[resp->opcnt++]; |
2355 | op->status = nfserr_retry_uncached_rep; | |
2356 | nfsd4_encode_operation(resp, op); | |
074fe897 | 2357 | } |
abfabf8c | 2358 | return op->status; |
074fe897 AA |
2359 | } |
2360 | ||
2361 | /* | |
557ce264 AA |
2362 | * The sequence operation is not cached because we can use the slot and |
2363 | * session values. | |
074fe897 | 2364 | */ |
3ca2eb98 | 2365 | static __be32 |
bf864a31 AA |
2366 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
2367 | struct nfsd4_sequence *seq) | |
074fe897 | 2368 | { |
557ce264 | 2369 | struct nfsd4_slot *slot = resp->cstate.slot; |
f5236013 BF |
2370 | struct xdr_stream *xdr = &resp->xdr; |
2371 | __be32 *p; | |
074fe897 AA |
2372 | __be32 status; |
2373 | ||
557ce264 | 2374 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 2375 | |
abfabf8c | 2376 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); |
0da7b19c | 2377 | if (status) |
abfabf8c | 2378 | return status; |
074fe897 | 2379 | |
f5236013 BF |
2380 | p = xdr_reserve_space(xdr, slot->sl_datalen); |
2381 | if (!p) { | |
2382 | WARN_ON_ONCE(1); | |
2383 | return nfserr_serverfault; | |
2384 | } | |
2385 | xdr_encode_opaque_fixed(p, slot->sl_data, slot->sl_datalen); | |
2386 | xdr_commit_encode(xdr); | |
074fe897 | 2387 | |
557ce264 | 2388 | resp->opcnt = slot->sl_opcnt; |
f5236013 | 2389 | return slot->sl_status; |
074fe897 AA |
2390 | } |
2391 | ||
0733d213 AA |
2392 | /* |
2393 | * Set the exchange_id flags returned by the server. | |
2394 | */ | |
2395 | static void | |
2396 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
2397 | { | |
9cf514cc CH |
2398 | #ifdef CONFIG_NFSD_PNFS |
2399 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_PNFS_MDS; | |
2400 | #else | |
0733d213 | 2401 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; |
9cf514cc | 2402 | #endif |
0733d213 AA |
2403 | |
2404 | /* Referrals are supported, Migration is not. */ | |
2405 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
2406 | ||
2407 | /* set the wire flags to return to client. */ | |
2408 | clid->flags = new->cl_exchange_flags; | |
2409 | } | |
2410 | ||
4eaea134 BF |
2411 | static bool client_has_openowners(struct nfs4_client *clp) |
2412 | { | |
2413 | struct nfs4_openowner *oo; | |
2414 | ||
2415 | list_for_each_entry(oo, &clp->cl_openowners, oo_perclient) { | |
2416 | if (!list_empty(&oo->oo_owner.so_stateids)) | |
2417 | return true; | |
2418 | } | |
2419 | return false; | |
2420 | } | |
2421 | ||
631fc9ea BF |
2422 | static bool client_has_state(struct nfs4_client *clp) |
2423 | { | |
4eaea134 | 2424 | return client_has_openowners(clp) |
47e970be KM |
2425 | #ifdef CONFIG_NFSD_PNFS |
2426 | || !list_empty(&clp->cl_lo_states) | |
2427 | #endif | |
6eccece9 BF |
2428 | || !list_empty(&clp->cl_delegations) |
2429 | || !list_empty(&clp->cl_sessions); | |
631fc9ea BF |
2430 | } |
2431 | ||
069b6ad4 | 2432 | __be32 |
eb69853d CH |
2433 | nfsd4_exchange_id(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2434 | union nfsd4_op_u *u) | |
069b6ad4 | 2435 | { |
eb69853d | 2436 | struct nfsd4_exchange_id *exid = &u->exchange_id; |
3dbacee6 TM |
2437 | struct nfs4_client *conf, *new; |
2438 | struct nfs4_client *unconf = NULL; | |
57b7b43b | 2439 | __be32 status; |
363168b4 | 2440 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 2441 | nfs4_verifier verf = exid->verifier; |
363168b4 | 2442 | struct sockaddr *sa = svc_addr(rqstp); |
83e08fd4 | 2443 | bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; |
c212cecf | 2444 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
0733d213 | 2445 | |
363168b4 | 2446 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 2447 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 2448 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 2449 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 2450 | addr_str, exid->flags, exid->spa_how); |
0733d213 | 2451 | |
a084daf5 | 2452 | if (exid->flags & ~EXCHGID4_FLAG_MASK_A) |
0733d213 AA |
2453 | return nfserr_inval; |
2454 | ||
50c7b948 BF |
2455 | new = create_client(exid->clname, rqstp, &verf); |
2456 | if (new == NULL) | |
2457 | return nfserr_jukebox; | |
2458 | ||
0733d213 | 2459 | switch (exid->spa_how) { |
57266a6e | 2460 | case SP4_MACH_CRED: |
ed941643 AE |
2461 | exid->spo_must_enforce[0] = 0; |
2462 | exid->spo_must_enforce[1] = ( | |
2463 | 1 << (OP_BIND_CONN_TO_SESSION - 32) | | |
2464 | 1 << (OP_EXCHANGE_ID - 32) | | |
2465 | 1 << (OP_CREATE_SESSION - 32) | | |
2466 | 1 << (OP_DESTROY_SESSION - 32) | | |
2467 | 1 << (OP_DESTROY_CLIENTID - 32)); | |
2468 | ||
2469 | exid->spo_must_allow[0] &= (1 << (OP_CLOSE) | | |
2470 | 1 << (OP_OPEN_DOWNGRADE) | | |
2471 | 1 << (OP_LOCKU) | | |
2472 | 1 << (OP_DELEGRETURN)); | |
2473 | ||
2474 | exid->spo_must_allow[1] &= ( | |
2475 | 1 << (OP_TEST_STATEID - 32) | | |
2476 | 1 << (OP_FREE_STATEID - 32)); | |
50c7b948 BF |
2477 | if (!svc_rqst_integrity_protected(rqstp)) { |
2478 | status = nfserr_inval; | |
2479 | goto out_nolock; | |
920dd9bb BF |
2480 | } |
2481 | /* | |
2482 | * Sometimes userspace doesn't give us a principal. | |
2483 | * Which is a bug, really. Anyway, we can't enforce | |
2484 | * MACH_CRED in that case, better to give up now: | |
2485 | */ | |
414ca017 BF |
2486 | if (!new->cl_cred.cr_principal && |
2487 | !new->cl_cred.cr_raw_principal) { | |
920dd9bb BF |
2488 | status = nfserr_serverfault; |
2489 | goto out_nolock; | |
50c7b948 BF |
2490 | } |
2491 | new->cl_mach_cred = true; | |
0733d213 AA |
2492 | case SP4_NONE: |
2493 | break; | |
063b0fb9 BF |
2494 | default: /* checked by xdr code */ |
2495 | WARN_ON_ONCE(1); | |
0733d213 | 2496 | case SP4_SSV: |
8edf4b02 KM |
2497 | status = nfserr_encr_alg_unsupp; |
2498 | goto out_nolock; | |
0733d213 AA |
2499 | } |
2500 | ||
2dbb269d | 2501 | /* Cases below refer to rfc 5661 section 18.35.4: */ |
3dbacee6 | 2502 | spin_lock(&nn->client_lock); |
382a62e7 | 2503 | conf = find_confirmed_client_by_name(&exid->clname, nn); |
0733d213 | 2504 | if (conf) { |
83e08fd4 BF |
2505 | bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); |
2506 | bool verfs_match = same_verf(&verf, &conf->cl_verifier); | |
2507 | ||
136e658d BF |
2508 | if (update) { |
2509 | if (!clp_used_exchangeid(conf)) { /* buggy client */ | |
2dbb269d | 2510 | status = nfserr_inval; |
1a308118 BF |
2511 | goto out; |
2512 | } | |
dedeb13f | 2513 | if (!nfsd4_mach_creds_match(conf, rqstp)) { |
57266a6e BF |
2514 | status = nfserr_wrong_cred; |
2515 | goto out; | |
2516 | } | |
136e658d | 2517 | if (!creds_match) { /* case 9 */ |
ea236d07 | 2518 | status = nfserr_perm; |
136e658d BF |
2519 | goto out; |
2520 | } | |
2521 | if (!verfs_match) { /* case 8 */ | |
0733d213 AA |
2522 | status = nfserr_not_same; |
2523 | goto out; | |
2524 | } | |
136e658d BF |
2525 | /* case 6 */ |
2526 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
136e658d | 2527 | goto out_copy; |
0733d213 | 2528 | } |
136e658d | 2529 | if (!creds_match) { /* case 3 */ |
631fc9ea BF |
2530 | if (client_has_state(conf)) { |
2531 | status = nfserr_clid_inuse; | |
0733d213 AA |
2532 | goto out; |
2533 | } | |
0733d213 AA |
2534 | goto out_new; |
2535 | } | |
136e658d | 2536 | if (verfs_match) { /* case 2 */ |
0f1ba0ef | 2537 | conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; |
136e658d BF |
2538 | goto out_copy; |
2539 | } | |
2540 | /* case 5, client reboot */ | |
3dbacee6 | 2541 | conf = NULL; |
136e658d | 2542 | goto out_new; |
6ddbbbfe MS |
2543 | } |
2544 | ||
2dbb269d | 2545 | if (update) { /* case 7 */ |
6ddbbbfe MS |
2546 | status = nfserr_noent; |
2547 | goto out; | |
0733d213 AA |
2548 | } |
2549 | ||
a99454aa | 2550 | unconf = find_unconfirmed_client_by_name(&exid->clname, nn); |
2dbb269d | 2551 | if (unconf) /* case 4, possible retry or client restart */ |
3dbacee6 | 2552 | unhash_client_locked(unconf); |
0733d213 | 2553 | |
2dbb269d | 2554 | /* case 1 (normal case) */ |
0733d213 | 2555 | out_new: |
fd699b8a JL |
2556 | if (conf) { |
2557 | status = mark_client_expired_locked(conf); | |
2558 | if (status) | |
2559 | goto out; | |
2560 | } | |
4f540e29 | 2561 | new->cl_minorversion = cstate->minorversion; |
ed941643 AE |
2562 | new->cl_spo_must_allow.u.words[0] = exid->spo_must_allow[0]; |
2563 | new->cl_spo_must_allow.u.words[1] = exid->spo_must_allow[1]; | |
0733d213 | 2564 | |
c212cecf | 2565 | gen_clid(new, nn); |
ac55fdc4 | 2566 | add_to_unconfirmed(new); |
3dbacee6 | 2567 | swap(new, conf); |
0733d213 | 2568 | out_copy: |
5cc40fd7 TM |
2569 | exid->clientid.cl_boot = conf->cl_clientid.cl_boot; |
2570 | exid->clientid.cl_id = conf->cl_clientid.cl_id; | |
0733d213 | 2571 | |
5cc40fd7 TM |
2572 | exid->seqid = conf->cl_cs_slot.sl_seqid + 1; |
2573 | nfsd4_set_ex_flags(conf, exid); | |
0733d213 AA |
2574 | |
2575 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
5cc40fd7 | 2576 | conf->cl_cs_slot.sl_seqid, conf->cl_exchange_flags); |
0733d213 AA |
2577 | status = nfs_ok; |
2578 | ||
2579 | out: | |
3dbacee6 | 2580 | spin_unlock(&nn->client_lock); |
50c7b948 | 2581 | out_nolock: |
5cc40fd7 | 2582 | if (new) |
3dbacee6 TM |
2583 | expire_client(new); |
2584 | if (unconf) | |
2585 | expire_client(unconf); | |
0733d213 | 2586 | return status; |
069b6ad4 AA |
2587 | } |
2588 | ||
57b7b43b | 2589 | static __be32 |
88e588d5 | 2590 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 2591 | { |
88e588d5 AA |
2592 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
2593 | slot_seqid); | |
b85d4c01 BH |
2594 | |
2595 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
2596 | if (slot_inuse) { |
2597 | if (seqid == slot_seqid) | |
b85d4c01 BH |
2598 | return nfserr_jukebox; |
2599 | else | |
2600 | return nfserr_seq_misordered; | |
2601 | } | |
f6d82485 | 2602 | /* Note unsigned 32-bit arithmetic handles wraparound: */ |
88e588d5 | 2603 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 | 2604 | return nfs_ok; |
88e588d5 | 2605 | if (seqid == slot_seqid) |
b85d4c01 | 2606 | return nfserr_replay_cache; |
b85d4c01 BH |
2607 | return nfserr_seq_misordered; |
2608 | } | |
2609 | ||
49557cc7 AA |
2610 | /* |
2611 | * Cache the create session result into the create session single DRC | |
2612 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
2613 | * Do this for solo or embedded create session operations. | |
2614 | */ | |
2615 | static void | |
2616 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
57b7b43b | 2617 | struct nfsd4_clid_slot *slot, __be32 nfserr) |
49557cc7 AA |
2618 | { |
2619 | slot->sl_status = nfserr; | |
2620 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
2621 | } | |
2622 | ||
2623 | static __be32 | |
2624 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
2625 | struct nfsd4_clid_slot *slot) | |
2626 | { | |
2627 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
2628 | return slot->sl_status; | |
2629 | } | |
2630 | ||
1b74c25b MJ |
2631 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
2632 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
2633 | 1 + /* MIN tag is length with zero, only length */ \ | |
2634 | 3 + /* version, opcount, opcode */ \ | |
2635 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
2636 | /* seqid, slotID, slotID, cache */ \ | |
2637 | 4 ) * sizeof(__be32)) | |
2638 | ||
2639 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
2640 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
2641 | 1 + /* status */ \ | |
2642 | 1 + /* MIN tag is length with zero, only length */ \ | |
2643 | 3 + /* opcount, opcode, opstatus*/ \ | |
2644 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
2645 | /* seqid, slotID, slotID, slotID, status */ \ | |
2646 | 5 ) * sizeof(__be32)) | |
2647 | ||
55c760cf | 2648 | static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs *ca, struct nfsd_net *nn) |
1b74c25b | 2649 | { |
55c760cf BF |
2650 | u32 maxrpc = nn->nfsd_serv->sv_max_mesg; |
2651 | ||
373cd409 BF |
2652 | if (ca->maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ) |
2653 | return nfserr_toosmall; | |
2654 | if (ca->maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ) | |
2655 | return nfserr_toosmall; | |
55c760cf BF |
2656 | ca->headerpadsz = 0; |
2657 | ca->maxreq_sz = min_t(u32, ca->maxreq_sz, maxrpc); | |
2658 | ca->maxresp_sz = min_t(u32, ca->maxresp_sz, maxrpc); | |
2659 | ca->maxops = min_t(u32, ca->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
2660 | ca->maxresp_cached = min_t(u32, ca->maxresp_cached, | |
2661 | NFSD_SLOT_CACHE_SIZE + NFSD_MIN_HDR_SEQ_SZ); | |
2662 | ca->maxreqs = min_t(u32, ca->maxreqs, NFSD_MAX_SLOTS_PER_SESSION); | |
2663 | /* | |
2664 | * Note decreasing slot size below client's request may make it | |
2665 | * difficult for client to function correctly, whereas | |
2666 | * decreasing the number of slots will (just?) affect | |
2667 | * performance. When short on memory we therefore prefer to | |
2668 | * decrease number of slots instead of their size. Clients that | |
2669 | * request larger slots than they need will get poor results: | |
2670 | */ | |
2671 | ca->maxreqs = nfsd4_get_drc_mem(ca); | |
2672 | if (!ca->maxreqs) | |
2673 | return nfserr_jukebox; | |
2674 | ||
373cd409 | 2675 | return nfs_ok; |
1b74c25b MJ |
2676 | } |
2677 | ||
4500632f CL |
2678 | /* |
2679 | * Server's NFSv4.1 backchannel support is AUTH_SYS-only for now. | |
2680 | * These are based on similar macros in linux/sunrpc/msg_prot.h . | |
2681 | */ | |
2682 | #define RPC_MAX_HEADER_WITH_AUTH_SYS \ | |
2683 | (RPC_CALLHDRSIZE + 2 * (2 + UNX_CALLSLACK)) | |
2684 | ||
2685 | #define RPC_MAX_REPHEADER_WITH_AUTH_SYS \ | |
2686 | (RPC_REPHDRSIZE + (2 + NUL_REPLYSLACK)) | |
2687 | ||
8a891633 | 2688 | #define NFSD_CB_MAX_REQ_SZ ((NFS4_enc_cb_recall_sz + \ |
4500632f | 2689 | RPC_MAX_HEADER_WITH_AUTH_SYS) * sizeof(__be32)) |
8a891633 | 2690 | #define NFSD_CB_MAX_RESP_SZ ((NFS4_dec_cb_recall_sz + \ |
4500632f CL |
2691 | RPC_MAX_REPHEADER_WITH_AUTH_SYS) * \ |
2692 | sizeof(__be32)) | |
8a891633 | 2693 | |
06b332a5 | 2694 | static __be32 check_backchannel_attrs(struct nfsd4_channel_attrs *ca) |
1b74c25b | 2695 | { |
06b332a5 BF |
2696 | ca->headerpadsz = 0; |
2697 | ||
8a891633 | 2698 | if (ca->maxreq_sz < NFSD_CB_MAX_REQ_SZ) |
06b332a5 | 2699 | return nfserr_toosmall; |
8a891633 | 2700 | if (ca->maxresp_sz < NFSD_CB_MAX_RESP_SZ) |
06b332a5 BF |
2701 | return nfserr_toosmall; |
2702 | ca->maxresp_cached = 0; | |
2703 | if (ca->maxops < 2) | |
2704 | return nfserr_toosmall; | |
2705 | ||
2706 | return nfs_ok; | |
1b74c25b MJ |
2707 | } |
2708 | ||
b78724b7 BF |
2709 | static __be32 nfsd4_check_cb_sec(struct nfsd4_cb_sec *cbs) |
2710 | { | |
2711 | switch (cbs->flavor) { | |
2712 | case RPC_AUTH_NULL: | |
2713 | case RPC_AUTH_UNIX: | |
2714 | return nfs_ok; | |
2715 | default: | |
2716 | /* | |
2717 | * GSS case: the spec doesn't allow us to return this | |
2718 | * error. But it also doesn't allow us not to support | |
2719 | * GSS. | |
2720 | * I'd rather this fail hard than return some error the | |
2721 | * client might think it can already handle: | |
2722 | */ | |
2723 | return nfserr_encr_alg_unsupp; | |
2724 | } | |
2725 | } | |
2726 | ||
069b6ad4 AA |
2727 | __be32 |
2728 | nfsd4_create_session(struct svc_rqst *rqstp, | |
eb69853d | 2729 | struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) |
069b6ad4 | 2730 | { |
eb69853d | 2731 | struct nfsd4_create_session *cr_ses = &u->create_session; |
363168b4 | 2732 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 2733 | struct nfs4_client *conf, *unconf; |
d20c11d8 | 2734 | struct nfs4_client *old = NULL; |
ac7c46f2 | 2735 | struct nfsd4_session *new; |
81f0b2a4 | 2736 | struct nfsd4_conn *conn; |
49557cc7 | 2737 | struct nfsd4_clid_slot *cs_slot = NULL; |
57b7b43b | 2738 | __be32 status = 0; |
8daae4dc | 2739 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
ec6b5d7b | 2740 | |
a62573dc MJ |
2741 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
2742 | return nfserr_inval; | |
b78724b7 BF |
2743 | status = nfsd4_check_cb_sec(&cr_ses->cb_sec); |
2744 | if (status) | |
2745 | return status; | |
55c760cf | 2746 | status = check_forechannel_attrs(&cr_ses->fore_channel, nn); |
06b332a5 BF |
2747 | if (status) |
2748 | return status; | |
2749 | status = check_backchannel_attrs(&cr_ses->back_channel); | |
373cd409 | 2750 | if (status) |
f403e450 | 2751 | goto out_release_drc_mem; |
81f0b2a4 | 2752 | status = nfserr_jukebox; |
60810e54 | 2753 | new = alloc_session(&cr_ses->fore_channel, &cr_ses->back_channel); |
55c760cf BF |
2754 | if (!new) |
2755 | goto out_release_drc_mem; | |
81f0b2a4 BF |
2756 | conn = alloc_conn_from_crses(rqstp, cr_ses); |
2757 | if (!conn) | |
2758 | goto out_free_session; | |
a62573dc | 2759 | |
d20c11d8 | 2760 | spin_lock(&nn->client_lock); |
0a7ec377 | 2761 | unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn); |
8daae4dc | 2762 | conf = find_confirmed_client(&cr_ses->clientid, true, nn); |
78389046 | 2763 | WARN_ON_ONCE(conf && unconf); |
ec6b5d7b AA |
2764 | |
2765 | if (conf) { | |
57266a6e | 2766 | status = nfserr_wrong_cred; |
dedeb13f | 2767 | if (!nfsd4_mach_creds_match(conf, rqstp)) |
57266a6e | 2768 | goto out_free_conn; |
49557cc7 AA |
2769 | cs_slot = &conf->cl_cs_slot; |
2770 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
f5e22bb6 KM |
2771 | if (status) { |
2772 | if (status == nfserr_replay_cache) | |
2773 | status = nfsd4_replay_create_session(cr_ses, cs_slot); | |
81f0b2a4 | 2774 | goto out_free_conn; |
ec6b5d7b | 2775 | } |
ec6b5d7b AA |
2776 | } else if (unconf) { |
2777 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || | |
363168b4 | 2778 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b | 2779 | status = nfserr_clid_inuse; |
81f0b2a4 | 2780 | goto out_free_conn; |
ec6b5d7b | 2781 | } |
57266a6e | 2782 | status = nfserr_wrong_cred; |
dedeb13f | 2783 | if (!nfsd4_mach_creds_match(unconf, rqstp)) |
57266a6e | 2784 | goto out_free_conn; |
49557cc7 AA |
2785 | cs_slot = &unconf->cl_cs_slot; |
2786 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
2787 | if (status) { |
2788 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 2789 | status = nfserr_seq_misordered; |
81f0b2a4 | 2790 | goto out_free_conn; |
ec6b5d7b | 2791 | } |
382a62e7 | 2792 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
221a6876 | 2793 | if (old) { |
d20c11d8 | 2794 | status = mark_client_expired_locked(old); |
7abea1e8 JL |
2795 | if (status) { |
2796 | old = NULL; | |
221a6876 | 2797 | goto out_free_conn; |
7abea1e8 | 2798 | } |
221a6876 | 2799 | } |
8f9d3d3b | 2800 | move_to_confirmed(unconf); |
ec6b5d7b AA |
2801 | conf = unconf; |
2802 | } else { | |
2803 | status = nfserr_stale_clientid; | |
81f0b2a4 | 2804 | goto out_free_conn; |
ec6b5d7b | 2805 | } |
81f0b2a4 | 2806 | status = nfs_ok; |
4ce85c8c | 2807 | /* Persistent sessions are not supported */ |
408b79bc | 2808 | cr_ses->flags &= ~SESSION4_PERSIST; |
4ce85c8c | 2809 | /* Upshifting from TCP to RDMA is not supported */ |
408b79bc BF |
2810 | cr_ses->flags &= ~SESSION4_RDMA; |
2811 | ||
81f0b2a4 | 2812 | init_session(rqstp, new, conf, cr_ses); |
d20c11d8 | 2813 | nfsd4_get_session_locked(new); |
81f0b2a4 | 2814 | |
ac7c46f2 | 2815 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, |
ec6b5d7b | 2816 | NFS4_MAX_SESSIONID_LEN); |
86c3e16c | 2817 | cs_slot->sl_seqid++; |
49557cc7 | 2818 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 2819 | |
d20c11d8 | 2820 | /* cache solo and embedded create sessions under the client_lock */ |
49557cc7 | 2821 | nfsd4_cache_create_session(cr_ses, cs_slot, status); |
d20c11d8 JL |
2822 | spin_unlock(&nn->client_lock); |
2823 | /* init connection and backchannel */ | |
2824 | nfsd4_init_conn(rqstp, conn, new); | |
2825 | nfsd4_put_session(new); | |
d20c11d8 JL |
2826 | if (old) |
2827 | expire_client(old); | |
ec6b5d7b | 2828 | return status; |
81f0b2a4 | 2829 | out_free_conn: |
d20c11d8 | 2830 | spin_unlock(&nn->client_lock); |
81f0b2a4 | 2831 | free_conn(conn); |
d20c11d8 JL |
2832 | if (old) |
2833 | expire_client(old); | |
81f0b2a4 BF |
2834 | out_free_session: |
2835 | __free_session(new); | |
55c760cf BF |
2836 | out_release_drc_mem: |
2837 | nfsd4_put_drc_mem(&cr_ses->fore_channel); | |
1ca50792 | 2838 | return status; |
069b6ad4 AA |
2839 | } |
2840 | ||
1d1bc8f2 BF |
2841 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
2842 | { | |
2843 | switch (*dir) { | |
2844 | case NFS4_CDFC4_FORE: | |
2845 | case NFS4_CDFC4_BACK: | |
2846 | return nfs_ok; | |
2847 | case NFS4_CDFC4_FORE_OR_BOTH: | |
2848 | case NFS4_CDFC4_BACK_OR_BOTH: | |
2849 | *dir = NFS4_CDFC4_BOTH; | |
2850 | return nfs_ok; | |
2851 | }; | |
2852 | return nfserr_inval; | |
2853 | } | |
2854 | ||
eb69853d CH |
2855 | __be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, |
2856 | struct nfsd4_compound_state *cstate, | |
2857 | union nfsd4_op_u *u) | |
cb73a9f4 | 2858 | { |
eb69853d | 2859 | struct nfsd4_backchannel_ctl *bc = &u->backchannel_ctl; |
cb73a9f4 | 2860 | struct nfsd4_session *session = cstate->session; |
c9a49628 | 2861 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
b78724b7 | 2862 | __be32 status; |
cb73a9f4 | 2863 | |
b78724b7 BF |
2864 | status = nfsd4_check_cb_sec(&bc->bc_cb_sec); |
2865 | if (status) | |
2866 | return status; | |
c9a49628 | 2867 | spin_lock(&nn->client_lock); |
cb73a9f4 BF |
2868 | session->se_cb_prog = bc->bc_cb_program; |
2869 | session->se_cb_sec = bc->bc_cb_sec; | |
c9a49628 | 2870 | spin_unlock(&nn->client_lock); |
cb73a9f4 BF |
2871 | |
2872 | nfsd4_probe_callback(session->se_client); | |
2873 | ||
2874 | return nfs_ok; | |
2875 | } | |
2876 | ||
1d1bc8f2 BF |
2877 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, |
2878 | struct nfsd4_compound_state *cstate, | |
eb69853d | 2879 | union nfsd4_op_u *u) |
1d1bc8f2 | 2880 | { |
eb69853d | 2881 | struct nfsd4_bind_conn_to_session *bcts = &u->bind_conn_to_session; |
1d1bc8f2 | 2882 | __be32 status; |
3ba63671 | 2883 | struct nfsd4_conn *conn; |
4f6e6c17 | 2884 | struct nfsd4_session *session; |
d4e19e70 TM |
2885 | struct net *net = SVC_NET(rqstp); |
2886 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1d1bc8f2 BF |
2887 | |
2888 | if (!nfsd4_last_compound_op(rqstp)) | |
2889 | return nfserr_not_only_op; | |
c9a49628 | 2890 | spin_lock(&nn->client_lock); |
d4e19e70 | 2891 | session = find_in_sessionid_hashtbl(&bcts->sessionid, net, &status); |
c9a49628 | 2892 | spin_unlock(&nn->client_lock); |
4f6e6c17 | 2893 | if (!session) |
d4e19e70 | 2894 | goto out_no_session; |
57266a6e | 2895 | status = nfserr_wrong_cred; |
dedeb13f | 2896 | if (!nfsd4_mach_creds_match(session->se_client, rqstp)) |
57266a6e | 2897 | goto out; |
1d1bc8f2 | 2898 | status = nfsd4_map_bcts_dir(&bcts->dir); |
3ba63671 | 2899 | if (status) |
4f6e6c17 | 2900 | goto out; |
3ba63671 | 2901 | conn = alloc_conn(rqstp, bcts->dir); |
4f6e6c17 | 2902 | status = nfserr_jukebox; |
3ba63671 | 2903 | if (!conn) |
4f6e6c17 BF |
2904 | goto out; |
2905 | nfsd4_init_conn(rqstp, conn, session); | |
2906 | status = nfs_ok; | |
2907 | out: | |
d4e19e70 TM |
2908 | nfsd4_put_session(session); |
2909 | out_no_session: | |
4f6e6c17 | 2910 | return status; |
1d1bc8f2 BF |
2911 | } |
2912 | ||
5d4cec2f BF |
2913 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
2914 | { | |
2915 | if (!session) | |
2916 | return 0; | |
2917 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
2918 | } | |
2919 | ||
069b6ad4 | 2920 | __be32 |
eb69853d CH |
2921 | nfsd4_destroy_session(struct svc_rqst *r, struct nfsd4_compound_state *cstate, |
2922 | union nfsd4_op_u *u) | |
069b6ad4 | 2923 | { |
eb69853d | 2924 | struct nfsd4_destroy_session *sessionid = &u->destroy_session; |
e10e0cfc | 2925 | struct nfsd4_session *ses; |
abcdff09 | 2926 | __be32 status; |
f0f51f5c | 2927 | int ref_held_by_me = 0; |
d4e19e70 TM |
2928 | struct net *net = SVC_NET(r); |
2929 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
e10e0cfc | 2930 | |
abcdff09 | 2931 | status = nfserr_not_only_op; |
5d4cec2f | 2932 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 | 2933 | if (!nfsd4_last_compound_op(r)) |
abcdff09 | 2934 | goto out; |
f0f51f5c | 2935 | ref_held_by_me++; |
57716355 | 2936 | } |
e10e0cfc | 2937 | dump_sessionid(__func__, &sessionid->sessionid); |
c9a49628 | 2938 | spin_lock(&nn->client_lock); |
d4e19e70 | 2939 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid, net, &status); |
abcdff09 BF |
2940 | if (!ses) |
2941 | goto out_client_lock; | |
57266a6e | 2942 | status = nfserr_wrong_cred; |
dedeb13f | 2943 | if (!nfsd4_mach_creds_match(ses->se_client, r)) |
d4e19e70 | 2944 | goto out_put_session; |
f0f51f5c | 2945 | status = mark_session_dead_locked(ses, 1 + ref_held_by_me); |
66b2b9b2 | 2946 | if (status) |
f0f51f5c | 2947 | goto out_put_session; |
e10e0cfc | 2948 | unhash_session(ses); |
c9a49628 | 2949 | spin_unlock(&nn->client_lock); |
e10e0cfc | 2950 | |
84f5f7cc | 2951 | nfsd4_probe_callback_sync(ses->se_client); |
19cf5c02 | 2952 | |
c9a49628 | 2953 | spin_lock(&nn->client_lock); |
e10e0cfc | 2954 | status = nfs_ok; |
f0f51f5c | 2955 | out_put_session: |
d4e19e70 | 2956 | nfsd4_put_session_locked(ses); |
abcdff09 BF |
2957 | out_client_lock: |
2958 | spin_unlock(&nn->client_lock); | |
e10e0cfc | 2959 | out: |
e10e0cfc | 2960 | return status; |
069b6ad4 AA |
2961 | } |
2962 | ||
a663bdd8 | 2963 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
2964 | { |
2965 | struct nfsd4_conn *c; | |
2966 | ||
2967 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 2968 | if (c->cn_xprt == xpt) { |
328ead28 BF |
2969 | return c; |
2970 | } | |
2971 | } | |
2972 | return NULL; | |
2973 | } | |
2974 | ||
57266a6e | 2975 | static __be32 nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
2976 | { |
2977 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 2978 | struct nfsd4_conn *c; |
57266a6e | 2979 | __be32 status = nfs_ok; |
21b75b01 | 2980 | int ret; |
328ead28 BF |
2981 | |
2982 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 2983 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
57266a6e BF |
2984 | if (c) |
2985 | goto out_free; | |
2986 | status = nfserr_conn_not_bound_to_session; | |
2987 | if (clp->cl_mach_cred) | |
2988 | goto out_free; | |
328ead28 BF |
2989 | __nfsd4_hash_conn(new, ses); |
2990 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
2991 | ret = nfsd4_register_conn(new); |
2992 | if (ret) | |
2993 | /* oops; xprt is already down: */ | |
2994 | nfsd4_conn_lost(&new->cn_xpt_user); | |
57266a6e BF |
2995 | return nfs_ok; |
2996 | out_free: | |
2997 | spin_unlock(&clp->cl_lock); | |
2998 | free_conn(new); | |
2999 | return status; | |
328ead28 BF |
3000 | } |
3001 | ||
868b89c3 MJ |
3002 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
3003 | { | |
3004 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
3005 | ||
3006 | return args->opcnt > session->se_fchannel.maxops; | |
3007 | } | |
3008 | ||
ae82a8d0 MJ |
3009 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
3010 | struct nfsd4_session *session) | |
3011 | { | |
3012 | struct xdr_buf *xb = &rqstp->rq_arg; | |
3013 | ||
3014 | return xb->len > session->se_fchannel.maxreq_sz; | |
3015 | } | |
3016 | ||
53da6a53 BF |
3017 | static bool replay_matches_cache(struct svc_rqst *rqstp, |
3018 | struct nfsd4_sequence *seq, struct nfsd4_slot *slot) | |
3019 | { | |
3020 | struct nfsd4_compoundargs *argp = rqstp->rq_argp; | |
3021 | ||
3022 | if ((bool)(slot->sl_flags & NFSD4_SLOT_CACHETHIS) != | |
3023 | (bool)seq->cachethis) | |
3024 | return false; | |
3025 | /* | |
3026 | * If there's an error than the reply can have fewer ops than | |
3027 | * the call. But if we cached a reply with *more* ops than the | |
3028 | * call you're sending us now, then this new call is clearly not | |
3029 | * really a replay of the old one: | |
3030 | */ | |
3031 | if (slot->sl_opcnt < argp->opcnt) | |
3032 | return false; | |
3033 | /* This is the only check explicitly called by spec: */ | |
3034 | if (!same_creds(&rqstp->rq_cred, &slot->sl_cred)) | |
3035 | return false; | |
3036 | /* | |
3037 | * There may be more comparisons we could actually do, but the | |
3038 | * spec doesn't require us to catch every case where the calls | |
3039 | * don't match (that would require caching the call as well as | |
3040 | * the reply), so we don't bother. | |
3041 | */ | |
3042 | return true; | |
3043 | } | |
3044 | ||
069b6ad4 | 3045 | __be32 |
eb69853d CH |
3046 | nfsd4_sequence(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3047 | union nfsd4_op_u *u) | |
069b6ad4 | 3048 | { |
eb69853d | 3049 | struct nfsd4_sequence *seq = &u->sequence; |
f9bb94c4 | 3050 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
47ee5298 | 3051 | struct xdr_stream *xdr = &resp->xdr; |
b85d4c01 | 3052 | struct nfsd4_session *session; |
221a6876 | 3053 | struct nfs4_client *clp; |
b85d4c01 | 3054 | struct nfsd4_slot *slot; |
a663bdd8 | 3055 | struct nfsd4_conn *conn; |
57b7b43b | 3056 | __be32 status; |
47ee5298 | 3057 | int buflen; |
d4e19e70 TM |
3058 | struct net *net = SVC_NET(rqstp); |
3059 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
b85d4c01 | 3060 | |
f9bb94c4 AA |
3061 | if (resp->opcnt != 1) |
3062 | return nfserr_sequence_pos; | |
3063 | ||
a663bdd8 BF |
3064 | /* |
3065 | * Will be either used or freed by nfsd4_sequence_check_conn | |
3066 | * below. | |
3067 | */ | |
3068 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
3069 | if (!conn) | |
3070 | return nfserr_jukebox; | |
3071 | ||
c9a49628 | 3072 | spin_lock(&nn->client_lock); |
d4e19e70 | 3073 | session = find_in_sessionid_hashtbl(&seq->sessionid, net, &status); |
b85d4c01 | 3074 | if (!session) |
221a6876 BF |
3075 | goto out_no_session; |
3076 | clp = session->se_client; | |
b85d4c01 | 3077 | |
868b89c3 MJ |
3078 | status = nfserr_too_many_ops; |
3079 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
66b2b9b2 | 3080 | goto out_put_session; |
868b89c3 | 3081 | |
ae82a8d0 MJ |
3082 | status = nfserr_req_too_big; |
3083 | if (nfsd4_request_too_big(rqstp, session)) | |
66b2b9b2 | 3084 | goto out_put_session; |
ae82a8d0 | 3085 | |
b85d4c01 | 3086 | status = nfserr_badslot; |
6c18ba9f | 3087 | if (seq->slotid >= session->se_fchannel.maxreqs) |
66b2b9b2 | 3088 | goto out_put_session; |
b85d4c01 | 3089 | |
557ce264 | 3090 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
3091 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
3092 | ||
a8dfdaeb AA |
3093 | /* We do not negotiate the number of slots yet, so set the |
3094 | * maxslots to the session maxreqs which is used to encode | |
3095 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
3096 | seq->maxslots = session->se_fchannel.maxreqs; | |
3097 | ||
73e79482 BF |
3098 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, |
3099 | slot->sl_flags & NFSD4_SLOT_INUSE); | |
b85d4c01 | 3100 | if (status == nfserr_replay_cache) { |
bf5c43c8 BF |
3101 | status = nfserr_seq_misordered; |
3102 | if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) | |
66b2b9b2 | 3103 | goto out_put_session; |
53da6a53 BF |
3104 | status = nfserr_seq_false_retry; |
3105 | if (!replay_matches_cache(rqstp, seq, slot)) | |
3106 | goto out_put_session; | |
b85d4c01 BH |
3107 | cstate->slot = slot; |
3108 | cstate->session = session; | |
4b24ca7d | 3109 | cstate->clp = clp; |
da3846a2 | 3110 | /* Return the cached reply status and set cstate->status |
557ce264 | 3111 | * for nfsd4_proc_compound processing */ |
bf864a31 | 3112 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 3113 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 3114 | goto out; |
b85d4c01 BH |
3115 | } |
3116 | if (status) | |
66b2b9b2 | 3117 | goto out_put_session; |
b85d4c01 | 3118 | |
57266a6e | 3119 | status = nfsd4_sequence_check_conn(conn, session); |
a663bdd8 | 3120 | conn = NULL; |
57266a6e BF |
3121 | if (status) |
3122 | goto out_put_session; | |
328ead28 | 3123 | |
47ee5298 BF |
3124 | buflen = (seq->cachethis) ? |
3125 | session->se_fchannel.maxresp_cached : | |
3126 | session->se_fchannel.maxresp_sz; | |
3127 | status = (seq->cachethis) ? nfserr_rep_too_big_to_cache : | |
3128 | nfserr_rep_too_big; | |
a5cddc88 | 3129 | if (xdr_restrict_buflen(xdr, buflen - rqstp->rq_auth_slack)) |
47ee5298 | 3130 | goto out_put_session; |
32aaa62e | 3131 | svc_reserve(rqstp, buflen); |
47ee5298 BF |
3132 | |
3133 | status = nfs_ok; | |
b85d4c01 | 3134 | /* Success! bump slot seqid */ |
b85d4c01 | 3135 | slot->sl_seqid = seq->seqid; |
bf5c43c8 | 3136 | slot->sl_flags |= NFSD4_SLOT_INUSE; |
73e79482 BF |
3137 | if (seq->cachethis) |
3138 | slot->sl_flags |= NFSD4_SLOT_CACHETHIS; | |
bf5c43c8 BF |
3139 | else |
3140 | slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; | |
b85d4c01 BH |
3141 | |
3142 | cstate->slot = slot; | |
3143 | cstate->session = session; | |
4b24ca7d | 3144 | cstate->clp = clp; |
b85d4c01 | 3145 | |
b85d4c01 | 3146 | out: |
221a6876 BF |
3147 | switch (clp->cl_cb_state) { |
3148 | case NFSD4_CB_DOWN: | |
3149 | seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; | |
3150 | break; | |
3151 | case NFSD4_CB_FAULT: | |
3152 | seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; | |
3153 | break; | |
3154 | default: | |
3155 | seq->status_flags = 0; | |
aaf84eb9 | 3156 | } |
3bd64a5b BF |
3157 | if (!list_empty(&clp->cl_revoked)) |
3158 | seq->status_flags |= SEQ4_STATUS_RECALLABLE_STATE_REVOKED; | |
221a6876 | 3159 | out_no_session: |
3f42d2c4 KM |
3160 | if (conn) |
3161 | free_conn(conn); | |
c9a49628 | 3162 | spin_unlock(&nn->client_lock); |
b85d4c01 | 3163 | return status; |
66b2b9b2 | 3164 | out_put_session: |
d4e19e70 | 3165 | nfsd4_put_session_locked(session); |
221a6876 | 3166 | goto out_no_session; |
069b6ad4 AA |
3167 | } |
3168 | ||
b607664e TM |
3169 | void |
3170 | nfsd4_sequence_done(struct nfsd4_compoundres *resp) | |
3171 | { | |
3172 | struct nfsd4_compound_state *cs = &resp->cstate; | |
3173 | ||
3174 | if (nfsd4_has_session(cs)) { | |
b607664e TM |
3175 | if (cs->status != nfserr_replay_cache) { |
3176 | nfsd4_store_cache_entry(resp); | |
3177 | cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE; | |
3178 | } | |
d4e19e70 | 3179 | /* Drop session reference that was taken in nfsd4_sequence() */ |
b607664e | 3180 | nfsd4_put_session(cs->session); |
4b24ca7d JL |
3181 | } else if (cs->clp) |
3182 | put_client_renew(cs->clp); | |
b607664e TM |
3183 | } |
3184 | ||
345c2842 | 3185 | __be32 |
eb69853d CH |
3186 | nfsd4_destroy_clientid(struct svc_rqst *rqstp, |
3187 | struct nfsd4_compound_state *cstate, | |
3188 | union nfsd4_op_u *u) | |
345c2842 | 3189 | { |
eb69853d | 3190 | struct nfsd4_destroy_clientid *dc = &u->destroy_clientid; |
6b10ad19 TM |
3191 | struct nfs4_client *conf, *unconf; |
3192 | struct nfs4_client *clp = NULL; | |
57b7b43b | 3193 | __be32 status = 0; |
8daae4dc | 3194 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
345c2842 | 3195 | |
6b10ad19 | 3196 | spin_lock(&nn->client_lock); |
0a7ec377 | 3197 | unconf = find_unconfirmed_client(&dc->clientid, true, nn); |
8daae4dc | 3198 | conf = find_confirmed_client(&dc->clientid, true, nn); |
78389046 | 3199 | WARN_ON_ONCE(conf && unconf); |
345c2842 MJ |
3200 | |
3201 | if (conf) { | |
c0293b01 | 3202 | if (client_has_state(conf)) { |
345c2842 MJ |
3203 | status = nfserr_clientid_busy; |
3204 | goto out; | |
3205 | } | |
fd699b8a JL |
3206 | status = mark_client_expired_locked(conf); |
3207 | if (status) | |
3208 | goto out; | |
6b10ad19 | 3209 | clp = conf; |
345c2842 MJ |
3210 | } else if (unconf) |
3211 | clp = unconf; | |
3212 | else { | |
3213 | status = nfserr_stale_clientid; | |
3214 | goto out; | |
3215 | } | |
dedeb13f | 3216 | if (!nfsd4_mach_creds_match(clp, rqstp)) { |
6b10ad19 | 3217 | clp = NULL; |
57266a6e BF |
3218 | status = nfserr_wrong_cred; |
3219 | goto out; | |
3220 | } | |
6b10ad19 | 3221 | unhash_client_locked(clp); |
345c2842 | 3222 | out: |
6b10ad19 | 3223 | spin_unlock(&nn->client_lock); |
6b10ad19 TM |
3224 | if (clp) |
3225 | expire_client(clp); | |
345c2842 MJ |
3226 | return status; |
3227 | } | |
3228 | ||
4dc6ec00 | 3229 | __be32 |
eb69853d CH |
3230 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, |
3231 | struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) | |
4dc6ec00 | 3232 | { |
eb69853d | 3233 | struct nfsd4_reclaim_complete *rc = &u->reclaim_complete; |
57b7b43b | 3234 | __be32 status = 0; |
bcecf1cc | 3235 | |
4dc6ec00 BF |
3236 | if (rc->rca_one_fs) { |
3237 | if (!cstate->current_fh.fh_dentry) | |
3238 | return nfserr_nofilehandle; | |
3239 | /* | |
3240 | * We don't take advantage of the rca_one_fs case. | |
3241 | * That's OK, it's optional, we can safely ignore it. | |
3242 | */ | |
d28c442f | 3243 | return nfs_ok; |
4dc6ec00 | 3244 | } |
bcecf1cc | 3245 | |
bcecf1cc | 3246 | status = nfserr_complete_already; |
a52d726b JL |
3247 | if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, |
3248 | &cstate->session->se_client->cl_flags)) | |
bcecf1cc MJ |
3249 | goto out; |
3250 | ||
3251 | status = nfserr_stale_clientid; | |
3252 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
3253 | /* |
3254 | * The following error isn't really legal. | |
3255 | * But we only get here if the client just explicitly | |
3256 | * destroyed the client. Surely it no longer cares what | |
3257 | * error it gets back on an operation for the dead | |
3258 | * client. | |
3259 | */ | |
bcecf1cc MJ |
3260 | goto out; |
3261 | ||
3262 | status = nfs_ok; | |
2a4317c5 | 3263 | nfsd4_client_record_create(cstate->session->se_client); |
bcecf1cc | 3264 | out: |
bcecf1cc | 3265 | return status; |
4dc6ec00 BF |
3266 | } |
3267 | ||
b37ad28b | 3268 | __be32 |
b591480b | 3269 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 3270 | union nfsd4_op_u *u) |
1da177e4 | 3271 | { |
eb69853d | 3272 | struct nfsd4_setclientid *setclid = &u->setclientid; |
a084daf5 | 3273 | struct xdr_netobj clname = setclid->se_name; |
1da177e4 | 3274 | nfs4_verifier clverifier = setclid->se_verf; |
3dbacee6 TM |
3275 | struct nfs4_client *conf, *new; |
3276 | struct nfs4_client *unconf = NULL; | |
b37ad28b | 3277 | __be32 status; |
c212cecf SK |
3278 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
3279 | ||
5cc40fd7 TM |
3280 | new = create_client(clname, rqstp, &clverifier); |
3281 | if (new == NULL) | |
3282 | return nfserr_jukebox; | |
63db4632 | 3283 | /* Cases below refer to rfc 3530 section 14.2.33: */ |
3dbacee6 | 3284 | spin_lock(&nn->client_lock); |
382a62e7 | 3285 | conf = find_confirmed_client_by_name(&clname, nn); |
2b634821 | 3286 | if (conf && client_has_state(conf)) { |
63db4632 | 3287 | /* case 0: */ |
1da177e4 | 3288 | status = nfserr_clid_inuse; |
e203d506 BF |
3289 | if (clp_used_exchangeid(conf)) |
3290 | goto out; | |
026722c2 | 3291 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
3292 | char addr_str[INET6_ADDRSTRLEN]; |
3293 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
3294 | sizeof(addr_str)); | |
3295 | dprintk("NFSD: setclientid: string in use by client " | |
3296 | "at %s\n", addr_str); | |
1da177e4 LT |
3297 | goto out; |
3298 | } | |
1da177e4 | 3299 | } |
a99454aa | 3300 | unconf = find_unconfirmed_client_by_name(&clname, nn); |
8f930711 | 3301 | if (unconf) |
3dbacee6 | 3302 | unhash_client_locked(unconf); |
41eb1670 | 3303 | if (conf && same_verf(&conf->cl_verifier, &clverifier)) { |
63db4632 | 3304 | /* case 1: probable callback update */ |
1da177e4 | 3305 | copy_clid(new, conf); |
41eb1670 KM |
3306 | gen_confirm(new, nn); |
3307 | } else /* case 4 (new client) or cases 2, 3 (client reboot): */ | |
c212cecf | 3308 | gen_clid(new, nn); |
8323c3b2 | 3309 | new->cl_minorversion = 0; |
6f3d772f | 3310 | gen_callback(new, setclid, rqstp); |
ac55fdc4 | 3311 | add_to_unconfirmed(new); |
1da177e4 LT |
3312 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
3313 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
3314 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
5cc40fd7 | 3315 | new = NULL; |
1da177e4 LT |
3316 | status = nfs_ok; |
3317 | out: | |
3dbacee6 | 3318 | spin_unlock(&nn->client_lock); |
5cc40fd7 TM |
3319 | if (new) |
3320 | free_client(new); | |
3dbacee6 TM |
3321 | if (unconf) |
3322 | expire_client(unconf); | |
1da177e4 LT |
3323 | return status; |
3324 | } | |
3325 | ||
3326 | ||
b37ad28b | 3327 | __be32 |
b591480b | 3328 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
eb69853d CH |
3329 | struct nfsd4_compound_state *cstate, |
3330 | union nfsd4_op_u *u) | |
1da177e4 | 3331 | { |
eb69853d CH |
3332 | struct nfsd4_setclientid_confirm *setclientid_confirm = |
3333 | &u->setclientid_confirm; | |
21ab45a4 | 3334 | struct nfs4_client *conf, *unconf; |
d20c11d8 | 3335 | struct nfs4_client *old = NULL; |
1da177e4 LT |
3336 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
3337 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 3338 | __be32 status; |
7f2210fa | 3339 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 3340 | |
2c142baa | 3341 | if (STALE_CLIENTID(clid, nn)) |
1da177e4 | 3342 | return nfserr_stale_clientid; |
21ab45a4 | 3343 | |
d20c11d8 | 3344 | spin_lock(&nn->client_lock); |
8daae4dc | 3345 | conf = find_confirmed_client(clid, false, nn); |
0a7ec377 | 3346 | unconf = find_unconfirmed_client(clid, false, nn); |
a186e767 | 3347 | /* |
8695b90a BF |
3348 | * We try hard to give out unique clientid's, so if we get an |
3349 | * attempt to confirm the same clientid with a different cred, | |
f984a7ce BF |
3350 | * the client may be buggy; this should never happen. |
3351 | * | |
3352 | * Nevertheless, RFC 7530 recommends INUSE for this case: | |
a186e767 | 3353 | */ |
f984a7ce | 3354 | status = nfserr_clid_inuse; |
8695b90a BF |
3355 | if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) |
3356 | goto out; | |
3357 | if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) | |
3358 | goto out; | |
63db4632 | 3359 | /* cases below refer to rfc 3530 section 14.2.34: */ |
90d700b7 | 3360 | if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) { |
7d22fc11 BF |
3361 | if (conf && same_verf(&confirm, &conf->cl_confirm)) { |
3362 | /* case 2: probable retransmit */ | |
1da177e4 | 3363 | status = nfs_ok; |
7d22fc11 | 3364 | } else /* case 4: client hasn't noticed we rebooted yet? */ |
90d700b7 BF |
3365 | status = nfserr_stale_clientid; |
3366 | goto out; | |
3367 | } | |
3368 | status = nfs_ok; | |
3369 | if (conf) { /* case 1: callback update */ | |
d20c11d8 JL |
3370 | old = unconf; |
3371 | unhash_client_locked(old); | |
8695b90a | 3372 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
90d700b7 | 3373 | } else { /* case 3: normal case; new or rebooted client */ |
d20c11d8 JL |
3374 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
3375 | if (old) { | |
2b634821 BF |
3376 | status = nfserr_clid_inuse; |
3377 | if (client_has_state(old) | |
3378 | && !same_creds(&unconf->cl_cred, | |
3379 | &old->cl_cred)) | |
3380 | goto out; | |
d20c11d8 | 3381 | status = mark_client_expired_locked(old); |
7abea1e8 JL |
3382 | if (status) { |
3383 | old = NULL; | |
221a6876 | 3384 | goto out; |
7abea1e8 | 3385 | } |
221a6876 | 3386 | } |
8695b90a | 3387 | move_to_confirmed(unconf); |
d20c11d8 | 3388 | conf = unconf; |
08e8987c | 3389 | } |
d20c11d8 JL |
3390 | get_client_locked(conf); |
3391 | spin_unlock(&nn->client_lock); | |
3392 | nfsd4_probe_callback(conf); | |
3393 | spin_lock(&nn->client_lock); | |
3394 | put_client_renew_locked(conf); | |
1da177e4 | 3395 | out: |
d20c11d8 JL |
3396 | spin_unlock(&nn->client_lock); |
3397 | if (old) | |
3398 | expire_client(old); | |
1da177e4 LT |
3399 | return status; |
3400 | } | |
3401 | ||
32513b40 BF |
3402 | static struct nfs4_file *nfsd4_alloc_file(void) |
3403 | { | |
3404 | return kmem_cache_alloc(file_slab, GFP_KERNEL); | |
3405 | } | |
3406 | ||
1da177e4 | 3407 | /* OPEN Share state helper functions */ |
5b095e99 JL |
3408 | static void nfsd4_init_file(struct knfsd_fh *fh, unsigned int hashval, |
3409 | struct nfs4_file *fp) | |
1da177e4 | 3410 | { |
950e0118 TM |
3411 | lockdep_assert_held(&state_lock); |
3412 | ||
818a34eb | 3413 | refcount_set(&fp->fi_ref, 1); |
1d31a253 | 3414 | spin_lock_init(&fp->fi_lock); |
32513b40 BF |
3415 | INIT_LIST_HEAD(&fp->fi_stateids); |
3416 | INIT_LIST_HEAD(&fp->fi_delegations); | |
8287f009 | 3417 | INIT_LIST_HEAD(&fp->fi_clnt_odstate); |
e2cf80d7 | 3418 | fh_copy_shallow(&fp->fi_fhandle, fh); |
0c637be8 | 3419 | fp->fi_deleg_file = NULL; |
32513b40 | 3420 | fp->fi_had_conflict = false; |
baeb4ff0 | 3421 | fp->fi_share_deny = 0; |
32513b40 BF |
3422 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); |
3423 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
9cf514cc CH |
3424 | #ifdef CONFIG_NFSD_PNFS |
3425 | INIT_LIST_HEAD(&fp->fi_lo_states); | |
c5c707f9 | 3426 | atomic_set(&fp->fi_lo_recalls, 0); |
9cf514cc | 3427 | #endif |
5b095e99 | 3428 | hlist_add_head_rcu(&fp->fi_hash, &file_hashtbl[hashval]); |
1da177e4 LT |
3429 | } |
3430 | ||
e8ff2a84 | 3431 | void |
1da177e4 LT |
3432 | nfsd4_free_slabs(void) |
3433 | { | |
8287f009 | 3434 | kmem_cache_destroy(odstate_slab); |
abf1135b CH |
3435 | kmem_cache_destroy(openowner_slab); |
3436 | kmem_cache_destroy(lockowner_slab); | |
3437 | kmem_cache_destroy(file_slab); | |
3438 | kmem_cache_destroy(stateid_slab); | |
3439 | kmem_cache_destroy(deleg_slab); | |
e60d4398 | 3440 | } |
1da177e4 | 3441 | |
72083396 | 3442 | int |
e60d4398 N |
3443 | nfsd4_init_slabs(void) |
3444 | { | |
fe0750e5 BF |
3445 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
3446 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
3447 | if (openowner_slab == NULL) | |
abf1135b | 3448 | goto out; |
fe0750e5 | 3449 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", |
3c40794b | 3450 | sizeof(struct nfs4_lockowner), 0, 0, NULL); |
fe0750e5 | 3451 | if (lockowner_slab == NULL) |
abf1135b | 3452 | goto out_free_openowner_slab; |
e60d4398 | 3453 | file_slab = kmem_cache_create("nfsd4_files", |
20c2df83 | 3454 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 | 3455 | if (file_slab == NULL) |
abf1135b | 3456 | goto out_free_lockowner_slab; |
5ac049ac | 3457 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
dcef0413 | 3458 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
5ac049ac | 3459 | if (stateid_slab == NULL) |
abf1135b | 3460 | goto out_free_file_slab; |
5b2d21c1 | 3461 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 3462 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 | 3463 | if (deleg_slab == NULL) |
abf1135b | 3464 | goto out_free_stateid_slab; |
8287f009 SB |
3465 | odstate_slab = kmem_cache_create("nfsd4_odstate", |
3466 | sizeof(struct nfs4_clnt_odstate), 0, 0, NULL); | |
3467 | if (odstate_slab == NULL) | |
3468 | goto out_free_deleg_slab; | |
e60d4398 | 3469 | return 0; |
abf1135b | 3470 | |
8287f009 SB |
3471 | out_free_deleg_slab: |
3472 | kmem_cache_destroy(deleg_slab); | |
abf1135b CH |
3473 | out_free_stateid_slab: |
3474 | kmem_cache_destroy(stateid_slab); | |
3475 | out_free_file_slab: | |
3476 | kmem_cache_destroy(file_slab); | |
3477 | out_free_lockowner_slab: | |
3478 | kmem_cache_destroy(lockowner_slab); | |
3479 | out_free_openowner_slab: | |
3480 | kmem_cache_destroy(openowner_slab); | |
3481 | out: | |
e60d4398 N |
3482 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); |
3483 | return -ENOMEM; | |
1da177e4 LT |
3484 | } |
3485 | ||
ff194bd9 | 3486 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 3487 | { |
ff194bd9 BF |
3488 | rp->rp_status = nfserr_serverfault; |
3489 | rp->rp_buflen = 0; | |
3490 | rp->rp_buf = rp->rp_ibuf; | |
58fb12e6 JL |
3491 | mutex_init(&rp->rp_mutex); |
3492 | } | |
3493 | ||
3494 | static void nfsd4_cstate_assign_replay(struct nfsd4_compound_state *cstate, | |
3495 | struct nfs4_stateowner *so) | |
3496 | { | |
3497 | if (!nfsd4_has_session(cstate)) { | |
3498 | mutex_lock(&so->so_replay.rp_mutex); | |
b5971afa | 3499 | cstate->replay_owner = nfs4_get_stateowner(so); |
58fb12e6 JL |
3500 | } |
3501 | } | |
3502 | ||
3503 | void nfsd4_cstate_clear_replay(struct nfsd4_compound_state *cstate) | |
3504 | { | |
3505 | struct nfs4_stateowner *so = cstate->replay_owner; | |
3506 | ||
3507 | if (so != NULL) { | |
3508 | cstate->replay_owner = NULL; | |
3509 | mutex_unlock(&so->so_replay.rp_mutex); | |
3510 | nfs4_put_stateowner(so); | |
3511 | } | |
1da177e4 LT |
3512 | } |
3513 | ||
fe0750e5 | 3514 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 3515 | { |
1da177e4 | 3516 | struct nfs4_stateowner *sop; |
1da177e4 | 3517 | |
fe0750e5 | 3518 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
3519 | if (!sop) |
3520 | return NULL; | |
3521 | ||
3522 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); | |
3523 | if (!sop->so_owner.data) { | |
fe0750e5 | 3524 | kmem_cache_free(slab, sop); |
1da177e4 | 3525 | return NULL; |
ff194bd9 BF |
3526 | } |
3527 | sop->so_owner.len = owner->len; | |
3528 | ||
ea1da636 | 3529 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 BF |
3530 | sop->so_client = clp; |
3531 | init_nfs4_replay(&sop->so_replay); | |
6b180f0b | 3532 | atomic_set(&sop->so_count, 1); |
ff194bd9 BF |
3533 | return sop; |
3534 | } | |
3535 | ||
fe0750e5 | 3536 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 | 3537 | { |
d4f0489f | 3538 | lockdep_assert_held(&clp->cl_lock); |
9b531137 | 3539 | |
d4f0489f TM |
3540 | list_add(&oo->oo_owner.so_strhash, |
3541 | &clp->cl_ownerstr_hashtbl[strhashval]); | |
fe0750e5 | 3542 | list_add(&oo->oo_perclient, &clp->cl_openowners); |
ff194bd9 BF |
3543 | } |
3544 | ||
8f4b54c5 JL |
3545 | static void nfs4_unhash_openowner(struct nfs4_stateowner *so) |
3546 | { | |
d4f0489f | 3547 | unhash_openowner_locked(openowner(so)); |
8f4b54c5 JL |
3548 | } |
3549 | ||
6b180f0b JL |
3550 | static void nfs4_free_openowner(struct nfs4_stateowner *so) |
3551 | { | |
3552 | struct nfs4_openowner *oo = openowner(so); | |
3553 | ||
3554 | kmem_cache_free(openowner_slab, oo); | |
3555 | } | |
3556 | ||
3557 | static const struct nfs4_stateowner_operations openowner_ops = { | |
8f4b54c5 JL |
3558 | .so_unhash = nfs4_unhash_openowner, |
3559 | .so_free = nfs4_free_openowner, | |
6b180f0b JL |
3560 | }; |
3561 | ||
7fc0564e AE |
3562 | static struct nfs4_ol_stateid * |
3563 | nfsd4_find_existing_open(struct nfs4_file *fp, struct nfsd4_open *open) | |
3564 | { | |
3565 | struct nfs4_ol_stateid *local, *ret = NULL; | |
3566 | struct nfs4_openowner *oo = open->op_openowner; | |
3567 | ||
3568 | lockdep_assert_held(&fp->fi_lock); | |
3569 | ||
3570 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { | |
3571 | /* ignore lock owners */ | |
3572 | if (local->st_stateowner->so_is_open_owner == 0) | |
3573 | continue; | |
15ca08d3 TM |
3574 | if (local->st_stateowner != &oo->oo_owner) |
3575 | continue; | |
3576 | if (local->st_stid.sc_type == NFS4_OPEN_STID) { | |
7fc0564e | 3577 | ret = local; |
a15dfcd5 | 3578 | refcount_inc(&ret->st_stid.sc_count); |
7fc0564e AE |
3579 | break; |
3580 | } | |
3581 | } | |
3582 | return ret; | |
3583 | } | |
3584 | ||
15ca08d3 TM |
3585 | static __be32 |
3586 | nfsd4_verify_open_stid(struct nfs4_stid *s) | |
3587 | { | |
3588 | __be32 ret = nfs_ok; | |
3589 | ||
3590 | switch (s->sc_type) { | |
3591 | default: | |
3592 | break; | |
3593 | case NFS4_CLOSED_STID: | |
3594 | case NFS4_CLOSED_DELEG_STID: | |
3595 | ret = nfserr_bad_stateid; | |
3596 | break; | |
3597 | case NFS4_REVOKED_DELEG_STID: | |
3598 | ret = nfserr_deleg_revoked; | |
3599 | } | |
3600 | return ret; | |
3601 | } | |
3602 | ||
3603 | /* Lock the stateid st_mutex, and deal with races with CLOSE */ | |
3604 | static __be32 | |
3605 | nfsd4_lock_ol_stateid(struct nfs4_ol_stateid *stp) | |
3606 | { | |
3607 | __be32 ret; | |
3608 | ||
4f34bd05 | 3609 | mutex_lock_nested(&stp->st_mutex, LOCK_STATEID_MUTEX); |
15ca08d3 TM |
3610 | ret = nfsd4_verify_open_stid(&stp->st_stid); |
3611 | if (ret != nfs_ok) | |
3612 | mutex_unlock(&stp->st_mutex); | |
3613 | return ret; | |
3614 | } | |
3615 | ||
3616 | static struct nfs4_ol_stateid * | |
3617 | nfsd4_find_and_lock_existing_open(struct nfs4_file *fp, struct nfsd4_open *open) | |
3618 | { | |
3619 | struct nfs4_ol_stateid *stp; | |
3620 | for (;;) { | |
3621 | spin_lock(&fp->fi_lock); | |
3622 | stp = nfsd4_find_existing_open(fp, open); | |
3623 | spin_unlock(&fp->fi_lock); | |
3624 | if (!stp || nfsd4_lock_ol_stateid(stp) == nfs_ok) | |
3625 | break; | |
3626 | nfs4_put_stid(&stp->st_stid); | |
3627 | } | |
3628 | return stp; | |
3629 | } | |
3630 | ||
fe0750e5 | 3631 | static struct nfs4_openowner * |
13d6f66b | 3632 | alloc_init_open_stateowner(unsigned int strhashval, struct nfsd4_open *open, |
db24b3b4 JL |
3633 | struct nfsd4_compound_state *cstate) |
3634 | { | |
13d6f66b | 3635 | struct nfs4_client *clp = cstate->clp; |
7ffb5880 | 3636 | struct nfs4_openowner *oo, *ret; |
ff194bd9 | 3637 | |
fe0750e5 BF |
3638 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
3639 | if (!oo) | |
ff194bd9 | 3640 | return NULL; |
6b180f0b | 3641 | oo->oo_owner.so_ops = &openowner_ops; |
fe0750e5 BF |
3642 | oo->oo_owner.so_is_open_owner = 1; |
3643 | oo->oo_owner.so_seqid = open->op_seqid; | |
d3134b10 | 3644 | oo->oo_flags = 0; |
db24b3b4 JL |
3645 | if (nfsd4_has_session(cstate)) |
3646 | oo->oo_flags |= NFS4_OO_CONFIRMED; | |
fe0750e5 | 3647 | oo->oo_time = 0; |
38c387b5 | 3648 | oo->oo_last_closed_stid = NULL; |
fe0750e5 | 3649 | INIT_LIST_HEAD(&oo->oo_close_lru); |
d4f0489f TM |
3650 | spin_lock(&clp->cl_lock); |
3651 | ret = find_openstateowner_str_locked(strhashval, open, clp); | |
7ffb5880 TM |
3652 | if (ret == NULL) { |
3653 | hash_openowner(oo, clp, strhashval); | |
3654 | ret = oo; | |
3655 | } else | |
d50ffded KM |
3656 | nfs4_free_stateowner(&oo->oo_owner); |
3657 | ||
d4f0489f | 3658 | spin_unlock(&clp->cl_lock); |
c5952338 | 3659 | return ret; |
1da177e4 LT |
3660 | } |
3661 | ||
7fc0564e | 3662 | static struct nfs4_ol_stateid * |
8c7245ab | 3663 | init_open_stateid(struct nfs4_file *fp, struct nfsd4_open *open) |
7fc0564e AE |
3664 | { |
3665 | ||
fe0750e5 | 3666 | struct nfs4_openowner *oo = open->op_openowner; |
7fc0564e | 3667 | struct nfs4_ol_stateid *retstp = NULL; |
8c7245ab | 3668 | struct nfs4_ol_stateid *stp; |
1da177e4 | 3669 | |
8c7245ab | 3670 | stp = open->op_stp; |
5cc1fb2a OD |
3671 | /* We are moving these outside of the spinlocks to avoid the warnings */ |
3672 | mutex_init(&stp->st_mutex); | |
4f34bd05 | 3673 | mutex_lock_nested(&stp->st_mutex, OPEN_STATEID_MUTEX); |
5cc1fb2a | 3674 | |
15ca08d3 | 3675 | retry: |
7fc0564e AE |
3676 | spin_lock(&oo->oo_owner.so_client->cl_lock); |
3677 | spin_lock(&fp->fi_lock); | |
3678 | ||
3679 | retstp = nfsd4_find_existing_open(fp, open); | |
3680 | if (retstp) | |
3681 | goto out_unlock; | |
8c7245ab OD |
3682 | |
3683 | open->op_stp = NULL; | |
a15dfcd5 | 3684 | refcount_inc(&stp->st_stid.sc_count); |
3abdb607 | 3685 | stp->st_stid.sc_type = NFS4_OPEN_STID; |
3c87b9b7 | 3686 | INIT_LIST_HEAD(&stp->st_locks); |
b5971afa | 3687 | stp->st_stateowner = nfs4_get_stateowner(&oo->oo_owner); |
13cd2184 | 3688 | get_nfs4_file(fp); |
11b9164a | 3689 | stp->st_stid.sc_file = fp; |
1da177e4 LT |
3690 | stp->st_access_bmap = 0; |
3691 | stp->st_deny_bmap = 0; | |
4c4cd222 | 3692 | stp->st_openstp = NULL; |
1c755dc1 | 3693 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); |
1d31a253 | 3694 | list_add(&stp->st_perfile, &fp->fi_stateids); |
7fc0564e AE |
3695 | |
3696 | out_unlock: | |
1d31a253 | 3697 | spin_unlock(&fp->fi_lock); |
1c755dc1 | 3698 | spin_unlock(&oo->oo_owner.so_client->cl_lock); |
5cc1fb2a | 3699 | if (retstp) { |
15ca08d3 TM |
3700 | /* Handle races with CLOSE */ |
3701 | if (nfsd4_lock_ol_stateid(retstp) != nfs_ok) { | |
3702 | nfs4_put_stid(&retstp->st_stid); | |
3703 | goto retry; | |
3704 | } | |
8c7245ab | 3705 | /* To keep mutex tracking happy */ |
5cc1fb2a | 3706 | mutex_unlock(&stp->st_mutex); |
8c7245ab | 3707 | stp = retstp; |
5cc1fb2a | 3708 | } |
8c7245ab | 3709 | return stp; |
1da177e4 LT |
3710 | } |
3711 | ||
d3134b10 JL |
3712 | /* |
3713 | * In the 4.0 case we need to keep the owners around a little while to handle | |
3714 | * CLOSE replay. We still do need to release any file access that is held by | |
3715 | * them before returning however. | |
3716 | */ | |
fd39ca9a | 3717 | static void |
d3134b10 | 3718 | move_to_close_lru(struct nfs4_ol_stateid *s, struct net *net) |
1da177e4 | 3719 | { |
217526e7 | 3720 | struct nfs4_ol_stateid *last; |
d3134b10 JL |
3721 | struct nfs4_openowner *oo = openowner(s->st_stateowner); |
3722 | struct nfsd_net *nn = net_generic(s->st_stid.sc_client->net, | |
3723 | nfsd_net_id); | |
73758fed | 3724 | |
fe0750e5 | 3725 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 3726 | |
b401be22 JL |
3727 | /* |
3728 | * We know that we hold one reference via nfsd4_close, and another | |
3729 | * "persistent" reference for the client. If the refcount is higher | |
3730 | * than 2, then there are still calls in progress that are using this | |
3731 | * stateid. We can't put the sc_file reference until they are finished. | |
3732 | * Wait for the refcount to drop to 2. Since it has been unhashed, | |
3733 | * there should be no danger of the refcount going back up again at | |
3734 | * this point. | |
3735 | */ | |
a15dfcd5 | 3736 | wait_event(close_wq, refcount_read(&s->st_stid.sc_count) == 2); |
b401be22 | 3737 | |
d3134b10 JL |
3738 | release_all_access(s); |
3739 | if (s->st_stid.sc_file) { | |
3740 | put_nfs4_file(s->st_stid.sc_file); | |
3741 | s->st_stid.sc_file = NULL; | |
3742 | } | |
217526e7 JL |
3743 | |
3744 | spin_lock(&nn->client_lock); | |
3745 | last = oo->oo_last_closed_stid; | |
d3134b10 | 3746 | oo->oo_last_closed_stid = s; |
73758fed | 3747 | list_move_tail(&oo->oo_close_lru, &nn->close_lru); |
fe0750e5 | 3748 | oo->oo_time = get_seconds(); |
217526e7 JL |
3749 | spin_unlock(&nn->client_lock); |
3750 | if (last) | |
3751 | nfs4_put_stid(&last->st_stid); | |
1da177e4 LT |
3752 | } |
3753 | ||
1da177e4 LT |
3754 | /* search file_hashtbl[] for file */ |
3755 | static struct nfs4_file * | |
5b095e99 | 3756 | find_file_locked(struct knfsd_fh *fh, unsigned int hashval) |
1da177e4 | 3757 | { |
1da177e4 LT |
3758 | struct nfs4_file *fp; |
3759 | ||
5b095e99 | 3760 | hlist_for_each_entry_rcu(fp, &file_hashtbl[hashval], fi_hash) { |
4d94c2ef | 3761 | if (fh_match(&fp->fi_fhandle, fh)) { |
818a34eb | 3762 | if (refcount_inc_not_zero(&fp->fi_ref)) |
5b095e99 | 3763 | return fp; |
13cd2184 | 3764 | } |
1da177e4 LT |
3765 | } |
3766 | return NULL; | |
3767 | } | |
3768 | ||
e6ba76e1 | 3769 | struct nfs4_file * |
ca943217 | 3770 | find_file(struct knfsd_fh *fh) |
950e0118 TM |
3771 | { |
3772 | struct nfs4_file *fp; | |
5b095e99 | 3773 | unsigned int hashval = file_hashval(fh); |
950e0118 | 3774 | |
5b095e99 JL |
3775 | rcu_read_lock(); |
3776 | fp = find_file_locked(fh, hashval); | |
3777 | rcu_read_unlock(); | |
950e0118 TM |
3778 | return fp; |
3779 | } | |
3780 | ||
3781 | static struct nfs4_file * | |
f9c00c3a | 3782 | find_or_add_file(struct nfs4_file *new, struct knfsd_fh *fh) |
950e0118 TM |
3783 | { |
3784 | struct nfs4_file *fp; | |
5b095e99 JL |
3785 | unsigned int hashval = file_hashval(fh); |
3786 | ||
3787 | rcu_read_lock(); | |
3788 | fp = find_file_locked(fh, hashval); | |
3789 | rcu_read_unlock(); | |
3790 | if (fp) | |
3791 | return fp; | |
950e0118 TM |
3792 | |
3793 | spin_lock(&state_lock); | |
5b095e99 JL |
3794 | fp = find_file_locked(fh, hashval); |
3795 | if (likely(fp == NULL)) { | |
3796 | nfsd4_init_file(fh, hashval, new); | |
950e0118 TM |
3797 | fp = new; |
3798 | } | |
3799 | spin_unlock(&state_lock); | |
3800 | ||
3801 | return fp; | |
3802 | } | |
3803 | ||
1da177e4 LT |
3804 | /* |
3805 | * Called to check deny when READ with all zero stateid or | |
3806 | * WRITE with all zero or all one stateid | |
3807 | */ | |
b37ad28b | 3808 | static __be32 |
1da177e4 LT |
3809 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
3810 | { | |
1da177e4 | 3811 | struct nfs4_file *fp; |
baeb4ff0 | 3812 | __be32 ret = nfs_ok; |
1da177e4 | 3813 | |
ca943217 | 3814 | fp = find_file(¤t_fh->fh_handle); |
13cd2184 | 3815 | if (!fp) |
baeb4ff0 JL |
3816 | return ret; |
3817 | /* Check for conflicting share reservations */ | |
1d31a253 | 3818 | spin_lock(&fp->fi_lock); |
baeb4ff0 JL |
3819 | if (fp->fi_share_deny & deny_type) |
3820 | ret = nfserr_locked; | |
1d31a253 | 3821 | spin_unlock(&fp->fi_lock); |
13cd2184 N |
3822 | put_nfs4_file(fp); |
3823 | return ret; | |
1da177e4 LT |
3824 | } |
3825 | ||
0162ac2b | 3826 | static void nfsd4_cb_recall_prepare(struct nfsd4_callback *cb) |
1da177e4 | 3827 | { |
0162ac2b | 3828 | struct nfs4_delegation *dp = cb_to_delegation(cb); |
11b9164a TM |
3829 | struct nfsd_net *nn = net_generic(dp->dl_stid.sc_client->net, |
3830 | nfsd_net_id); | |
e8c69d17 | 3831 | |
11b9164a | 3832 | block_delegations(&dp->dl_stid.sc_file->fi_fhandle); |
f54fe962 | 3833 | |
dff1399f | 3834 | /* |
f54fe962 JL |
3835 | * We can't do this in nfsd_break_deleg_cb because it is |
3836 | * already holding inode->i_lock. | |
3837 | * | |
dff1399f JL |
3838 | * If the dl_time != 0, then we know that it has already been |
3839 | * queued for a lease break. Don't queue it again. | |
3840 | */ | |
f54fe962 | 3841 | spin_lock(&state_lock); |
dff1399f | 3842 | if (dp->dl_time == 0) { |
dff1399f | 3843 | dp->dl_time = get_seconds(); |
02e1215f | 3844 | list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru); |
dff1399f | 3845 | } |
02e1215f JL |
3846 | spin_unlock(&state_lock); |
3847 | } | |
1da177e4 | 3848 | |
0162ac2b CH |
3849 | static int nfsd4_cb_recall_done(struct nfsd4_callback *cb, |
3850 | struct rpc_task *task) | |
3851 | { | |
3852 | struct nfs4_delegation *dp = cb_to_delegation(cb); | |
3853 | ||
a457974f AE |
3854 | if (dp->dl_stid.sc_type == NFS4_CLOSED_DELEG_STID) |
3855 | return 1; | |
3856 | ||
0162ac2b CH |
3857 | switch (task->tk_status) { |
3858 | case 0: | |
3859 | return 1; | |
3860 | case -EBADHANDLE: | |
3861 | case -NFS4ERR_BAD_STATEID: | |
3862 | /* | |
3863 | * Race: client probably got cb_recall before open reply | |
3864 | * granting delegation. | |
3865 | */ | |
3866 | if (dp->dl_retries--) { | |
3867 | rpc_delay(task, 2 * HZ); | |
3868 | return 0; | |
3869 | } | |
3870 | /*FALLTHRU*/ | |
3871 | default: | |
3872 | return -1; | |
3873 | } | |
3874 | } | |
3875 | ||
3876 | static void nfsd4_cb_recall_release(struct nfsd4_callback *cb) | |
3877 | { | |
3878 | struct nfs4_delegation *dp = cb_to_delegation(cb); | |
3879 | ||
3880 | nfs4_put_stid(&dp->dl_stid); | |
3881 | } | |
3882 | ||
c4cb8974 | 3883 | static const struct nfsd4_callback_ops nfsd4_cb_recall_ops = { |
0162ac2b CH |
3884 | .prepare = nfsd4_cb_recall_prepare, |
3885 | .done = nfsd4_cb_recall_done, | |
3886 | .release = nfsd4_cb_recall_release, | |
3887 | }; | |
3888 | ||
02e1215f JL |
3889 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
3890 | { | |
3891 | /* | |
3892 | * We're assuming the state code never drops its reference | |
3893 | * without first removing the lease. Since we're in this lease | |
3894 | * callback (and since the lease code is serialized by the kernel | |
3895 | * lock) we know the server hasn't removed the lease yet, we know | |
3896 | * it's safe to take a reference. | |
3897 | */ | |
a15dfcd5 | 3898 | refcount_inc(&dp->dl_stid.sc_count); |
f0b5de1b | 3899 | nfsd4_run_cb(&dp->dl_recall); |
6b57d9c8 BF |
3900 | } |
3901 | ||
1c8c601a | 3902 | /* Called from break_lease() with i_lock held. */ |
4d01b7f5 JL |
3903 | static bool |
3904 | nfsd_break_deleg_cb(struct file_lock *fl) | |
6b57d9c8 | 3905 | { |
4d01b7f5 | 3906 | bool ret = false; |
acfdf5c3 BF |
3907 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
3908 | struct nfs4_delegation *dp; | |
6b57d9c8 | 3909 | |
7fa10cd1 BF |
3910 | if (!fp) { |
3911 | WARN(1, "(%p)->fl_owner NULL\n", fl); | |
4d01b7f5 | 3912 | return ret; |
7fa10cd1 BF |
3913 | } |
3914 | if (fp->fi_had_conflict) { | |
3915 | WARN(1, "duplicate break on %p\n", fp); | |
4d01b7f5 | 3916 | return ret; |
7fa10cd1 | 3917 | } |
0272e1fd BF |
3918 | /* |
3919 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 3920 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 3921 | * in time: |
0272e1fd BF |
3922 | */ |
3923 | fl->fl_break_time = 0; | |
1da177e4 | 3924 | |
02e1215f | 3925 | spin_lock(&fp->fi_lock); |
417c6629 JL |
3926 | fp->fi_had_conflict = true; |
3927 | /* | |
4d01b7f5 JL |
3928 | * If there are no delegations on the list, then return true |
3929 | * so that the lease code will go ahead and delete it. | |
417c6629 JL |
3930 | */ |
3931 | if (list_empty(&fp->fi_delegations)) | |
4d01b7f5 | 3932 | ret = true; |
417c6629 JL |
3933 | else |
3934 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
3935 | nfsd_break_one_deleg(dp); | |
02e1215f | 3936 | spin_unlock(&fp->fi_lock); |
4d01b7f5 | 3937 | return ret; |
1da177e4 LT |
3938 | } |
3939 | ||
c45198ed | 3940 | static int |
7448cc37 JL |
3941 | nfsd_change_deleg_cb(struct file_lock *onlist, int arg, |
3942 | struct list_head *dispose) | |
1da177e4 LT |
3943 | { |
3944 | if (arg & F_UNLCK) | |
c45198ed | 3945 | return lease_modify(onlist, arg, dispose); |
1da177e4 LT |
3946 | else |
3947 | return -EAGAIN; | |
3948 | } | |
3949 | ||
7b021967 | 3950 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
3951 | .lm_break = nfsd_break_deleg_cb, |
3952 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
3953 | }; |
3954 | ||
7a8711c9 BF |
3955 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
3956 | { | |
3957 | if (nfsd4_has_session(cstate)) | |
3958 | return nfs_ok; | |
3959 | if (seqid == so->so_seqid - 1) | |
3960 | return nfserr_replay_me; | |
3961 | if (seqid == so->so_seqid) | |
3962 | return nfs_ok; | |
3963 | return nfserr_bad_seqid; | |
3964 | } | |
1da177e4 | 3965 | |
4b24ca7d JL |
3966 | static __be32 lookup_clientid(clientid_t *clid, |
3967 | struct nfsd4_compound_state *cstate, | |
3968 | struct nfsd_net *nn) | |
3969 | { | |
3970 | struct nfs4_client *found; | |
3971 | ||
3972 | if (cstate->clp) { | |
3973 | found = cstate->clp; | |
3974 | if (!same_clid(&found->cl_clientid, clid)) | |
3975 | return nfserr_stale_clientid; | |
3976 | return nfs_ok; | |
3977 | } | |
3978 | ||
3979 | if (STALE_CLIENTID(clid, nn)) | |
3980 | return nfserr_stale_clientid; | |
3981 | ||
3982 | /* | |
3983 | * For v4.1+ we get the client in the SEQUENCE op. If we don't have one | |
3984 | * cached already then we know this is for is for v4.0 and "sessions" | |
3985 | * will be false. | |
3986 | */ | |
3987 | WARN_ON_ONCE(cstate->session); | |
3e339f96 | 3988 | spin_lock(&nn->client_lock); |
4b24ca7d | 3989 | found = find_confirmed_client(clid, false, nn); |
3e339f96 TM |
3990 | if (!found) { |
3991 | spin_unlock(&nn->client_lock); | |
4b24ca7d | 3992 | return nfserr_expired; |
3e339f96 TM |
3993 | } |
3994 | atomic_inc(&found->cl_refcount); | |
3995 | spin_unlock(&nn->client_lock); | |
4b24ca7d JL |
3996 | |
3997 | /* Cache the nfs4_client in cstate! */ | |
3998 | cstate->clp = found; | |
4b24ca7d JL |
3999 | return nfs_ok; |
4000 | } | |
4001 | ||
b37ad28b | 4002 | __be32 |
6668958f | 4003 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
3320fef1 | 4004 | struct nfsd4_open *open, struct nfsd_net *nn) |
1da177e4 | 4005 | { |
1da177e4 LT |
4006 | clientid_t *clientid = &open->op_clientid; |
4007 | struct nfs4_client *clp = NULL; | |
4008 | unsigned int strhashval; | |
fe0750e5 | 4009 | struct nfs4_openowner *oo = NULL; |
4cdc951b | 4010 | __be32 status; |
1da177e4 | 4011 | |
2c142baa | 4012 | if (STALE_CLIENTID(&open->op_clientid, nn)) |
1da177e4 | 4013 | return nfserr_stale_clientid; |
32513b40 BF |
4014 | /* |
4015 | * In case we need it later, after we've already created the | |
4016 | * file and don't want to risk a further failure: | |
4017 | */ | |
4018 | open->op_file = nfsd4_alloc_file(); | |
4019 | if (open->op_file == NULL) | |
4020 | return nfserr_jukebox; | |
1da177e4 | 4021 | |
2d91e895 TM |
4022 | status = lookup_clientid(clientid, cstate, nn); |
4023 | if (status) | |
4024 | return status; | |
4025 | clp = cstate->clp; | |
4026 | ||
d4f0489f TM |
4027 | strhashval = ownerstr_hashval(&open->op_owner); |
4028 | oo = find_openstateowner_str(strhashval, open, clp); | |
fe0750e5 BF |
4029 | open->op_openowner = oo; |
4030 | if (!oo) { | |
bcf130f9 | 4031 | goto new_owner; |
1da177e4 | 4032 | } |
dad1c067 | 4033 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
0f442aa2 | 4034 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
4035 | release_openowner(oo); |
4036 | open->op_openowner = NULL; | |
bcf130f9 | 4037 | goto new_owner; |
0f442aa2 | 4038 | } |
4cdc951b BF |
4039 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
4040 | if (status) | |
4041 | return status; | |
4cdc951b | 4042 | goto alloc_stateid; |
bcf130f9 | 4043 | new_owner: |
13d6f66b | 4044 | oo = alloc_init_open_stateowner(strhashval, open, cstate); |
bcf130f9 BF |
4045 | if (oo == NULL) |
4046 | return nfserr_jukebox; | |
4047 | open->op_openowner = oo; | |
4cdc951b | 4048 | alloc_stateid: |
b49e084d | 4049 | open->op_stp = nfs4_alloc_open_stateid(clp); |
4cdc951b BF |
4050 | if (!open->op_stp) |
4051 | return nfserr_jukebox; | |
8287f009 SB |
4052 | |
4053 | if (nfsd4_has_session(cstate) && | |
4054 | (cstate->current_fh.fh_export->ex_flags & NFSEXP_PNFS)) { | |
4055 | open->op_odstate = alloc_clnt_odstate(clp); | |
4056 | if (!open->op_odstate) | |
4057 | return nfserr_jukebox; | |
4058 | } | |
4059 | ||
0f442aa2 | 4060 | return nfs_ok; |
1da177e4 LT |
4061 | } |
4062 | ||
b37ad28b | 4063 | static inline __be32 |
4a6e43e6 N |
4064 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
4065 | { | |
4066 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
4067 | return nfserr_openmode; | |
4068 | else | |
4069 | return nfs_ok; | |
4070 | } | |
4071 | ||
f459e453 | 4072 | static int share_access_to_flags(u32 share_access) |
52f4fb43 | 4073 | { |
f459e453 | 4074 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
52f4fb43 N |
4075 | } |
4076 | ||
38c2f4b1 | 4077 | static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) |
24a0111e | 4078 | { |
f459e453 | 4079 | struct nfs4_stid *ret; |
24a0111e | 4080 | |
95da1b3a AE |
4081 | ret = find_stateid_by_type(cl, s, |
4082 | NFS4_DELEG_STID|NFS4_REVOKED_DELEG_STID); | |
f459e453 BF |
4083 | if (!ret) |
4084 | return NULL; | |
4085 | return delegstateid(ret); | |
24a0111e BF |
4086 | } |
4087 | ||
8b289b2c BF |
4088 | static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) |
4089 | { | |
4090 | return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || | |
4091 | open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; | |
4092 | } | |
4093 | ||
b37ad28b | 4094 | static __be32 |
41d22663 | 4095 | nfs4_check_deleg(struct nfs4_client *cl, struct nfsd4_open *open, |
567d9829 N |
4096 | struct nfs4_delegation **dp) |
4097 | { | |
4098 | int flags; | |
b37ad28b | 4099 | __be32 status = nfserr_bad_stateid; |
dcd94cc2 | 4100 | struct nfs4_delegation *deleg; |
567d9829 | 4101 | |
dcd94cc2 TM |
4102 | deleg = find_deleg_stateid(cl, &open->op_delegate_stateid); |
4103 | if (deleg == NULL) | |
c44c5eeb | 4104 | goto out; |
95da1b3a AE |
4105 | if (deleg->dl_stid.sc_type == NFS4_REVOKED_DELEG_STID) { |
4106 | nfs4_put_stid(&deleg->dl_stid); | |
4107 | if (cl->cl_minorversion) | |
4108 | status = nfserr_deleg_revoked; | |
4109 | goto out; | |
4110 | } | |
24a0111e | 4111 | flags = share_access_to_flags(open->op_share_access); |
dcd94cc2 TM |
4112 | status = nfs4_check_delegmode(deleg, flags); |
4113 | if (status) { | |
4114 | nfs4_put_stid(&deleg->dl_stid); | |
4115 | goto out; | |
4116 | } | |
4117 | *dp = deleg; | |
c44c5eeb | 4118 | out: |
8b289b2c | 4119 | if (!nfsd4_is_deleg_cur(open)) |
c44c5eeb N |
4120 | return nfs_ok; |
4121 | if (status) | |
4122 | return status; | |
dad1c067 | 4123 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
c44c5eeb | 4124 | return nfs_ok; |
567d9829 N |
4125 | } |
4126 | ||
21fb4016 BF |
4127 | static inline int nfs4_access_to_access(u32 nfs4_access) |
4128 | { | |
4129 | int flags = 0; | |
4130 | ||
4131 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
4132 | flags |= NFSD_MAY_READ; | |
4133 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
4134 | flags |= NFSD_MAY_WRITE; | |
4135 | return flags; | |
4136 | } | |
4137 | ||
7e6a72e5 CH |
4138 | static inline __be32 |
4139 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, | |
4140 | struct nfsd4_open *open) | |
4141 | { | |
4142 | struct iattr iattr = { | |
4143 | .ia_valid = ATTR_SIZE, | |
4144 | .ia_size = 0, | |
4145 | }; | |
4146 | if (!open->op_truncate) | |
4147 | return 0; | |
4148 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
4149 | return nfserr_inval; | |
4150 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); | |
4151 | } | |
4152 | ||
0c12eaff | 4153 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
6eb3a1d0 JL |
4154 | struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp, |
4155 | struct nfsd4_open *open) | |
f9d7562f | 4156 | { |
de18643d | 4157 | struct file *filp = NULL; |
f9d7562f | 4158 | __be32 status; |
0c12eaff CB |
4159 | int oflag = nfs4_access_to_omode(open->op_share_access); |
4160 | int access = nfs4_access_to_access(open->op_share_access); | |
baeb4ff0 | 4161 | unsigned char old_access_bmap, old_deny_bmap; |
0c12eaff | 4162 | |
de18643d | 4163 | spin_lock(&fp->fi_lock); |
baeb4ff0 JL |
4164 | |
4165 | /* | |
4166 | * Are we trying to set a deny mode that would conflict with | |
4167 | * current access? | |
4168 | */ | |
4169 | status = nfs4_file_check_deny(fp, open->op_share_deny); | |
4170 | if (status != nfs_ok) { | |
4171 | spin_unlock(&fp->fi_lock); | |
4172 | goto out; | |
4173 | } | |
4174 | ||
4175 | /* set access to the file */ | |
4176 | status = nfs4_file_get_access(fp, open->op_share_access); | |
4177 | if (status != nfs_ok) { | |
4178 | spin_unlock(&fp->fi_lock); | |
4179 | goto out; | |
4180 | } | |
4181 | ||
4182 | /* Set access bits in stateid */ | |
4183 | old_access_bmap = stp->st_access_bmap; | |
4184 | set_access(open->op_share_access, stp); | |
4185 | ||
4186 | /* Set new deny mask */ | |
4187 | old_deny_bmap = stp->st_deny_bmap; | |
4188 | set_deny(open->op_share_deny, stp); | |
4189 | fp->fi_share_deny |= (open->op_share_deny & NFS4_SHARE_DENY_BOTH); | |
4190 | ||
f9d7562f | 4191 | if (!fp->fi_fds[oflag]) { |
de18643d TM |
4192 | spin_unlock(&fp->fi_lock); |
4193 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, &filp); | |
f9d7562f | 4194 | if (status) |
baeb4ff0 | 4195 | goto out_put_access; |
de18643d TM |
4196 | spin_lock(&fp->fi_lock); |
4197 | if (!fp->fi_fds[oflag]) { | |
4198 | fp->fi_fds[oflag] = filp; | |
4199 | filp = NULL; | |
4200 | } | |
f9d7562f | 4201 | } |
de18643d TM |
4202 | spin_unlock(&fp->fi_lock); |
4203 | if (filp) | |
4204 | fput(filp); | |
f9d7562f | 4205 | |
7e6a72e5 CH |
4206 | status = nfsd4_truncate(rqstp, cur_fh, open); |
4207 | if (status) | |
4208 | goto out_put_access; | |
7e6a72e5 CH |
4209 | out: |
4210 | return status; | |
baeb4ff0 JL |
4211 | out_put_access: |
4212 | stp->st_access_bmap = old_access_bmap; | |
4213 | nfs4_file_put_access(fp, open->op_share_access); | |
4214 | reset_union_bmap_deny(bmap_to_share_mode(old_deny_bmap), stp); | |
4215 | goto out; | |
1da177e4 LT |
4216 | } |
4217 | ||
b37ad28b | 4218 | static __be32 |
dcef0413 | 4219 | 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 | 4220 | { |
b37ad28b | 4221 | __be32 status; |
6ac75368 | 4222 | unsigned char old_deny_bmap = stp->st_deny_bmap; |
1da177e4 | 4223 | |
6eb3a1d0 | 4224 | if (!test_access(open->op_share_access, stp)) |
baeb4ff0 | 4225 | return nfs4_get_vfs_file(rqstp, fp, cur_fh, stp, open); |
7e6a72e5 | 4226 | |
baeb4ff0 JL |
4227 | /* test and set deny mode */ |
4228 | spin_lock(&fp->fi_lock); | |
4229 | status = nfs4_file_check_deny(fp, open->op_share_deny); | |
4230 | if (status == nfs_ok) { | |
baeb4ff0 JL |
4231 | set_deny(open->op_share_deny, stp); |
4232 | fp->fi_share_deny |= | |
4233 | (open->op_share_deny & NFS4_SHARE_DENY_BOTH); | |
4234 | } | |
4235 | spin_unlock(&fp->fi_lock); | |
4236 | ||
4237 | if (status != nfs_ok) | |
1da177e4 | 4238 | return status; |
1da177e4 | 4239 | |
baeb4ff0 JL |
4240 | status = nfsd4_truncate(rqstp, cur_fh, open); |
4241 | if (status != nfs_ok) | |
4242 | reset_union_bmap_deny(old_deny_bmap, stp); | |
4243 | return status; | |
4244 | } | |
1da177e4 | 4245 | |
14a24e99 BF |
4246 | /* Should we give out recallable state?: */ |
4247 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
4248 | { | |
4249 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
4250 | return true; | |
4251 | /* | |
4252 | * In the sessions case, since we don't have to establish a | |
4253 | * separate connection for callbacks, we assume it's OK | |
4254 | * until we hear otherwise: | |
4255 | */ | |
4256 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
4257 | } | |
4258 | ||
d564fbec | 4259 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_file *fp, int flag) |
22d38c4c BF |
4260 | { |
4261 | struct file_lock *fl; | |
4262 | ||
4263 | fl = locks_alloc_lock(); | |
4264 | if (!fl) | |
4265 | return NULL; | |
22d38c4c | 4266 | fl->fl_lmops = &nfsd_lease_mng_ops; |
617588d5 | 4267 | fl->fl_flags = FL_DELEG; |
22d38c4c BF |
4268 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; |
4269 | fl->fl_end = OFFSET_MAX; | |
d564fbec | 4270 | fl->fl_owner = (fl_owner_t)fp; |
22d38c4c | 4271 | fl->fl_pid = current->tgid; |
22d38c4c BF |
4272 | return fl; |
4273 | } | |
4274 | ||
34ed9872 AE |
4275 | /** |
4276 | * nfs4_setlease - Obtain a delegation by requesting lease from vfs layer | |
4277 | * @dp: a pointer to the nfs4_delegation we're adding. | |
4278 | * | |
4279 | * Return: | |
4280 | * On success: Return code will be 0 on success. | |
4281 | * | |
4282 | * On error: -EAGAIN if there was an existing delegation. | |
4283 | * nonzero if there is an error in other cases. | |
4284 | * | |
4285 | */ | |
4286 | ||
99c41515 | 4287 | static int nfs4_setlease(struct nfs4_delegation *dp) |
edab9782 | 4288 | { |
11b9164a | 4289 | struct nfs4_file *fp = dp->dl_stid.sc_file; |
efde6b4d | 4290 | struct file_lock *fl; |
417c6629 JL |
4291 | struct file *filp; |
4292 | int status = 0; | |
edab9782 | 4293 | |
d564fbec | 4294 | fl = nfs4_alloc_init_lease(fp, NFS4_OPEN_DELEGATE_READ); |
edab9782 BF |
4295 | if (!fl) |
4296 | return -ENOMEM; | |
417c6629 JL |
4297 | filp = find_readable_file(fp); |
4298 | if (!filp) { | |
4299 | /* We should always have a readable file here */ | |
4300 | WARN_ON_ONCE(1); | |
af9dbaf4 | 4301 | locks_free_lock(fl); |
417c6629 JL |
4302 | return -EBADF; |
4303 | } | |
4304 | fl->fl_file = filp; | |
e6f5c789 | 4305 | status = vfs_setlease(filp, fl->fl_type, &fl, NULL); |
1c7dd2ff | 4306 | if (fl) |
417c6629 | 4307 | locks_free_lock(fl); |
1c7dd2ff | 4308 | if (status) |
417c6629 | 4309 | goto out_fput; |
417c6629 JL |
4310 | spin_lock(&state_lock); |
4311 | spin_lock(&fp->fi_lock); | |
4312 | /* Did the lease get broken before we took the lock? */ | |
4313 | status = -EAGAIN; | |
4314 | if (fp->fi_had_conflict) | |
4315 | goto out_unlock; | |
4316 | /* Race breaker */ | |
0c637be8 | 4317 | if (fp->fi_deleg_file) { |
34ed9872 | 4318 | status = hash_delegation_locked(dp, fp); |
417c6629 JL |
4319 | goto out_unlock; |
4320 | } | |
417c6629 | 4321 | fp->fi_deleg_file = filp; |
34ed9872 AE |
4322 | fp->fi_delegees = 0; |
4323 | status = hash_delegation_locked(dp, fp); | |
417c6629 | 4324 | spin_unlock(&fp->fi_lock); |
cdc97505 | 4325 | spin_unlock(&state_lock); |
34ed9872 AE |
4326 | if (status) { |
4327 | /* Should never happen, this is a new fi_deleg_file */ | |
4328 | WARN_ON_ONCE(1); | |
4329 | goto out_fput; | |
4330 | } | |
acfdf5c3 | 4331 | return 0; |
417c6629 JL |
4332 | out_unlock: |
4333 | spin_unlock(&fp->fi_lock); | |
4334 | spin_unlock(&state_lock); | |
4335 | out_fput: | |
4336 | fput(filp); | |
e873088f | 4337 | return status; |
acfdf5c3 BF |
4338 | } |
4339 | ||
0b26693c JL |
4340 | static struct nfs4_delegation * |
4341 | nfs4_set_delegation(struct nfs4_client *clp, struct svc_fh *fh, | |
8287f009 | 4342 | struct nfs4_file *fp, struct nfs4_clnt_odstate *odstate) |
acfdf5c3 | 4343 | { |
0b26693c JL |
4344 | int status; |
4345 | struct nfs4_delegation *dp; | |
417c6629 | 4346 | |
bf7bd3e9 | 4347 | if (fp->fi_had_conflict) |
0b26693c JL |
4348 | return ERR_PTR(-EAGAIN); |
4349 | ||
34ed9872 AE |
4350 | spin_lock(&state_lock); |
4351 | spin_lock(&fp->fi_lock); | |
4352 | status = nfs4_get_existing_delegation(clp, fp); | |
4353 | spin_unlock(&fp->fi_lock); | |
4354 | spin_unlock(&state_lock); | |
4355 | ||
4356 | if (status) | |
4357 | return ERR_PTR(status); | |
4358 | ||
8287f009 | 4359 | dp = alloc_init_deleg(clp, fh, odstate); |
0b26693c JL |
4360 | if (!dp) |
4361 | return ERR_PTR(-ENOMEM); | |
4362 | ||
bf7bd3e9 | 4363 | get_nfs4_file(fp); |
417c6629 JL |
4364 | spin_lock(&state_lock); |
4365 | spin_lock(&fp->fi_lock); | |
11b9164a | 4366 | dp->dl_stid.sc_file = fp; |
0c637be8 | 4367 | if (!fp->fi_deleg_file) { |
417c6629 JL |
4368 | spin_unlock(&fp->fi_lock); |
4369 | spin_unlock(&state_lock); | |
0b26693c JL |
4370 | status = nfs4_setlease(dp); |
4371 | goto out; | |
417c6629 | 4372 | } |
acfdf5c3 | 4373 | if (fp->fi_had_conflict) { |
417c6629 JL |
4374 | status = -EAGAIN; |
4375 | goto out_unlock; | |
acfdf5c3 | 4376 | } |
34ed9872 | 4377 | status = hash_delegation_locked(dp, fp); |
417c6629 JL |
4378 | out_unlock: |
4379 | spin_unlock(&fp->fi_lock); | |
cdc97505 | 4380 | spin_unlock(&state_lock); |
0b26693c JL |
4381 | out: |
4382 | if (status) { | |
8287f009 | 4383 | put_clnt_odstate(dp->dl_clnt_odstate); |
6011695d | 4384 | nfs4_put_stid(&dp->dl_stid); |
0b26693c JL |
4385 | return ERR_PTR(status); |
4386 | } | |
4387 | return dp; | |
edab9782 BF |
4388 | } |
4389 | ||
4aa8913c BH |
4390 | static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) |
4391 | { | |
4392 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
4393 | if (status == -EAGAIN) | |
4394 | open->op_why_no_deleg = WND4_CONTENTION; | |
4395 | else { | |
4396 | open->op_why_no_deleg = WND4_RESOURCE; | |
4397 | switch (open->op_deleg_want) { | |
4398 | case NFS4_SHARE_WANT_READ_DELEG: | |
4399 | case NFS4_SHARE_WANT_WRITE_DELEG: | |
4400 | case NFS4_SHARE_WANT_ANY_DELEG: | |
4401 | break; | |
4402 | case NFS4_SHARE_WANT_CANCEL: | |
4403 | open->op_why_no_deleg = WND4_CANCELLED; | |
4404 | break; | |
4405 | case NFS4_SHARE_WANT_NO_DELEG: | |
063b0fb9 | 4406 | WARN_ON_ONCE(1); |
4aa8913c BH |
4407 | } |
4408 | } | |
4409 | } | |
4410 | ||
1da177e4 LT |
4411 | /* |
4412 | * Attempt to hand out a delegation. | |
99c41515 BF |
4413 | * |
4414 | * Note we don't support write delegations, and won't until the vfs has | |
4415 | * proper support for them. | |
1da177e4 LT |
4416 | */ |
4417 | static void | |
4cf59221 JL |
4418 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, |
4419 | struct nfs4_ol_stateid *stp) | |
1da177e4 LT |
4420 | { |
4421 | struct nfs4_delegation *dp; | |
4cf59221 JL |
4422 | struct nfs4_openowner *oo = openowner(stp->st_stateowner); |
4423 | struct nfs4_client *clp = stp->st_stid.sc_client; | |
14a24e99 | 4424 | int cb_up; |
99c41515 | 4425 | int status = 0; |
1da177e4 | 4426 | |
fe0750e5 | 4427 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
7b190fec N |
4428 | open->op_recall = 0; |
4429 | switch (open->op_claim_type) { | |
4430 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 4431 | if (!cb_up) |
7b190fec | 4432 | open->op_recall = 1; |
99c41515 BF |
4433 | if (open->op_delegate_type != NFS4_OPEN_DELEGATE_READ) |
4434 | goto out_no_deleg; | |
7b190fec N |
4435 | break; |
4436 | case NFS4_OPEN_CLAIM_NULL: | |
ed47b062 | 4437 | case NFS4_OPEN_CLAIM_FH: |
99c41515 BF |
4438 | /* |
4439 | * Let's not give out any delegations till everyone's | |
c87fb4a3 BF |
4440 | * had the chance to reclaim theirs, *and* until |
4441 | * NLM locks have all been reclaimed: | |
99c41515 | 4442 | */ |
4cf59221 | 4443 | if (locks_in_grace(clp->net)) |
99c41515 | 4444 | goto out_no_deleg; |
dad1c067 | 4445 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
99c41515 | 4446 | goto out_no_deleg; |
9a0590ae SD |
4447 | /* |
4448 | * Also, if the file was opened for write or | |
4449 | * create, there's a good chance the client's | |
4450 | * about to write to it, resulting in an | |
4451 | * immediate recall (since we don't support | |
4452 | * write delegations): | |
4453 | */ | |
7b190fec | 4454 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
99c41515 BF |
4455 | goto out_no_deleg; |
4456 | if (open->op_create == NFS4_OPEN_CREATE) | |
4457 | goto out_no_deleg; | |
7b190fec N |
4458 | break; |
4459 | default: | |
99c41515 | 4460 | goto out_no_deleg; |
7b190fec | 4461 | } |
8287f009 | 4462 | dp = nfs4_set_delegation(clp, fh, stp->st_stid.sc_file, stp->st_clnt_odstate); |
0b26693c | 4463 | if (IS_ERR(dp)) |
dd239cc0 | 4464 | goto out_no_deleg; |
1da177e4 | 4465 | |
d5477a8d | 4466 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 4467 | |
8c10cbdb | 4468 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
d5477a8d | 4469 | STATEID_VAL(&dp->dl_stid.sc_stateid)); |
99c41515 | 4470 | open->op_delegate_type = NFS4_OPEN_DELEGATE_READ; |
67cb1279 | 4471 | nfs4_put_stid(&dp->dl_stid); |
dd239cc0 | 4472 | return; |
dd239cc0 | 4473 | out_no_deleg: |
99c41515 BF |
4474 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE; |
4475 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && | |
d08d32e6 | 4476 | open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) { |
99c41515 | 4477 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
d08d32e6 BF |
4478 | open->op_recall = 1; |
4479 | } | |
99c41515 BF |
4480 | |
4481 | /* 4.1 client asking for a delegation? */ | |
4482 | if (open->op_deleg_want) | |
4483 | nfsd4_open_deleg_none_ext(open, status); | |
4484 | return; | |
1da177e4 LT |
4485 | } |
4486 | ||
e27f49c3 BH |
4487 | static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, |
4488 | struct nfs4_delegation *dp) | |
4489 | { | |
4490 | if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && | |
4491 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
4492 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
4493 | open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; | |
4494 | } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && | |
4495 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
4496 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
4497 | open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; | |
4498 | } | |
4499 | /* Otherwise the client must be confused wanting a delegation | |
4500 | * it already has, therefore we don't return | |
4501 | * NFS4_OPEN_DELEGATE_NONE_EXT and reason. | |
4502 | */ | |
4503 | } | |
4504 | ||
b37ad28b | 4505 | __be32 |
1da177e4 LT |
4506 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
4507 | { | |
6668958f | 4508 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
38c2f4b1 | 4509 | struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; |
1da177e4 | 4510 | struct nfs4_file *fp = NULL; |
dcef0413 | 4511 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 4512 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 4513 | __be32 status; |
d8a1a000 | 4514 | bool new_stp = false; |
1da177e4 | 4515 | |
1da177e4 LT |
4516 | /* |
4517 | * Lookup file; if found, lookup stateid and check open request, | |
4518 | * and check for delegations in the process of being recalled. | |
4519 | * If not found, create the nfs4_file struct | |
4520 | */ | |
f9c00c3a | 4521 | fp = find_or_add_file(open->op_file, ¤t_fh->fh_handle); |
950e0118 | 4522 | if (fp != open->op_file) { |
41d22663 | 4523 | status = nfs4_check_deleg(cl, open, &dp); |
c44c5eeb N |
4524 | if (status) |
4525 | goto out; | |
15ca08d3 | 4526 | stp = nfsd4_find_and_lock_existing_open(fp, open); |
1da177e4 | 4527 | } else { |
950e0118 | 4528 | open->op_file = NULL; |
c44c5eeb | 4529 | status = nfserr_bad_stateid; |
8b289b2c | 4530 | if (nfsd4_is_deleg_cur(open)) |
c44c5eeb | 4531 | goto out; |
1da177e4 LT |
4532 | } |
4533 | ||
d8a1a000 TM |
4534 | if (!stp) { |
4535 | stp = init_open_stateid(fp, open); | |
4536 | if (!open->op_stp) | |
4537 | new_stp = true; | |
4538 | } | |
4539 | ||
1da177e4 LT |
4540 | /* |
4541 | * OPEN the file, or upgrade an existing OPEN. | |
4542 | * If truncate fails, the OPEN fails. | |
d8a1a000 TM |
4543 | * |
4544 | * stp is already locked. | |
1da177e4 | 4545 | */ |
d8a1a000 | 4546 | if (!new_stp) { |
1da177e4 | 4547 | /* Stateid was found, this is an OPEN upgrade */ |
f9d7562f | 4548 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
35a92fe8 | 4549 | if (status) { |
feb9dad5 | 4550 | mutex_unlock(&stp->st_mutex); |
1da177e4 | 4551 | goto out; |
35a92fe8 | 4552 | } |
1da177e4 | 4553 | } else { |
6eb3a1d0 JL |
4554 | status = nfs4_get_vfs_file(rqstp, fp, current_fh, stp, open); |
4555 | if (status) { | |
d8a1a000 | 4556 | stp->st_stid.sc_type = NFS4_CLOSED_STID; |
6eb3a1d0 | 4557 | release_open_stateid(stp); |
d8a1a000 | 4558 | mutex_unlock(&stp->st_mutex); |
6eb3a1d0 JL |
4559 | goto out; |
4560 | } | |
8287f009 SB |
4561 | |
4562 | stp->st_clnt_odstate = find_or_hash_clnt_odstate(fp, | |
4563 | open->op_odstate); | |
4564 | if (stp->st_clnt_odstate == open->op_odstate) | |
4565 | open->op_odstate = NULL; | |
1da177e4 | 4566 | } |
d8a1a000 | 4567 | |
9767feb2 | 4568 | nfs4_inc_and_copy_stateid(&open->op_stateid, &stp->st_stid); |
feb9dad5 | 4569 | mutex_unlock(&stp->st_mutex); |
1da177e4 | 4570 | |
d24433cd | 4571 | if (nfsd4_has_session(&resp->cstate)) { |
d24433cd BH |
4572 | if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { |
4573 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
4574 | open->op_why_no_deleg = WND4_NOT_WANTED; | |
4575 | goto nodeleg; | |
4576 | } | |
4577 | } | |
4578 | ||
1da177e4 LT |
4579 | /* |
4580 | * Attempt to hand out a delegation. No error return, because the | |
4581 | * OPEN succeeds even if we fail. | |
4582 | */ | |
4cf59221 | 4583 | nfs4_open_delegation(current_fh, open, stp); |
d24433cd | 4584 | nodeleg: |
1da177e4 LT |
4585 | status = nfs_ok; |
4586 | ||
8c10cbdb | 4587 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
dcef0413 | 4588 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
1da177e4 | 4589 | out: |
d24433cd BH |
4590 | /* 4.1 client trying to upgrade/downgrade delegation? */ |
4591 | if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && | |
e27f49c3 BH |
4592 | open->op_deleg_want) |
4593 | nfsd4_deleg_xgrade_none_ext(open, dp); | |
d24433cd | 4594 | |
13cd2184 N |
4595 | if (fp) |
4596 | put_nfs4_file(fp); | |
37515177 | 4597 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
87186022 | 4598 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
1da177e4 LT |
4599 | /* |
4600 | * To finish the open response, we just need to set the rflags. | |
4601 | */ | |
4602 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
19e4c347 JL |
4603 | if (nfsd4_has_session(&resp->cstate)) |
4604 | open->op_rflags |= NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK; | |
4605 | else if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED)) | |
1da177e4 | 4606 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
19e4c347 | 4607 | |
dcd94cc2 TM |
4608 | if (dp) |
4609 | nfs4_put_stid(&dp->dl_stid); | |
d6f2bc5d TM |
4610 | if (stp) |
4611 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 LT |
4612 | |
4613 | return status; | |
4614 | } | |
4615 | ||
58fb12e6 | 4616 | void nfsd4_cleanup_open_state(struct nfsd4_compound_state *cstate, |
42297899 | 4617 | struct nfsd4_open *open) |
d29b20cd BF |
4618 | { |
4619 | if (open->op_openowner) { | |
d3134b10 JL |
4620 | struct nfs4_stateowner *so = &open->op_openowner->oo_owner; |
4621 | ||
4622 | nfsd4_cstate_assign_replay(cstate, so); | |
4623 | nfs4_put_stateowner(so); | |
d29b20cd | 4624 | } |
32513b40 | 4625 | if (open->op_file) |
5b095e99 | 4626 | kmem_cache_free(file_slab, open->op_file); |
4cdc951b | 4627 | if (open->op_stp) |
6011695d | 4628 | nfs4_put_stid(&open->op_stp->st_stid); |
8287f009 SB |
4629 | if (open->op_odstate) |
4630 | kmem_cache_free(odstate_slab, open->op_odstate); | |
d29b20cd BF |
4631 | } |
4632 | ||
b37ad28b | 4633 | __be32 |
b591480b | 4634 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 4635 | union nfsd4_op_u *u) |
1da177e4 | 4636 | { |
eb69853d | 4637 | clientid_t *clid = &u->renew; |
1da177e4 | 4638 | struct nfs4_client *clp; |
b37ad28b | 4639 | __be32 status; |
7f2210fa | 4640 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4641 | |
1da177e4 LT |
4642 | dprintk("process_renew(%08x/%08x): starting\n", |
4643 | clid->cl_boot, clid->cl_id); | |
4b24ca7d | 4644 | status = lookup_clientid(clid, cstate, nn); |
9b2ef62b | 4645 | if (status) |
1da177e4 | 4646 | goto out; |
4b24ca7d | 4647 | clp = cstate->clp; |
1da177e4 | 4648 | status = nfserr_cb_path_down; |
ea1da636 | 4649 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 4650 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
4651 | goto out; |
4652 | status = nfs_ok; | |
4653 | out: | |
1da177e4 LT |
4654 | return status; |
4655 | } | |
4656 | ||
7f5ef2e9 | 4657 | void |
12760c66 | 4658 | nfsd4_end_grace(struct nfsd_net *nn) |
a76b4319 | 4659 | { |
33dcc481 | 4660 | /* do nothing if grace period already ended */ |
a51c84ed | 4661 | if (nn->grace_ended) |
33dcc481 JL |
4662 | return; |
4663 | ||
a76b4319 | 4664 | dprintk("NFSD: end of grace period\n"); |
a51c84ed | 4665 | nn->grace_ended = true; |
70b28235 BF |
4666 | /* |
4667 | * If the server goes down again right now, an NFSv4 | |
4668 | * client will still be allowed to reclaim after it comes back up, | |
4669 | * even if it hasn't yet had a chance to reclaim state this time. | |
4670 | * | |
4671 | */ | |
919b8049 | 4672 | nfsd4_record_grace_done(nn); |
70b28235 BF |
4673 | /* |
4674 | * At this point, NFSv4 clients can still reclaim. But if the | |
4675 | * server crashes, any that have not yet reclaimed will be out | |
4676 | * of luck on the next boot. | |
4677 | * | |
4678 | * (NFSv4.1+ clients are considered to have reclaimed once they | |
4679 | * call RECLAIM_COMPLETE. NFSv4.0 clients are considered to | |
4680 | * have reclaimed after their first OPEN.) | |
4681 | */ | |
5e1533c7 | 4682 | locks_end_grace(&nn->nfsd4_manager); |
70b28235 BF |
4683 | /* |
4684 | * At this point, and once lockd and/or any other containers | |
4685 | * exit their grace period, further reclaims will fail and | |
4686 | * regular locking can resume. | |
4687 | */ | |
a76b4319 N |
4688 | } |
4689 | ||
fd39ca9a | 4690 | static time_t |
09121281 | 4691 | nfs4_laundromat(struct nfsd_net *nn) |
1da177e4 LT |
4692 | { |
4693 | struct nfs4_client *clp; | |
fe0750e5 | 4694 | struct nfs4_openowner *oo; |
1da177e4 | 4695 | struct nfs4_delegation *dp; |
217526e7 | 4696 | struct nfs4_ol_stateid *stp; |
7919d0a2 | 4697 | struct nfsd4_blocked_lock *nbl; |
1da177e4 | 4698 | struct list_head *pos, *next, reaplist; |
3d733711 | 4699 | time_t cutoff = get_seconds() - nn->nfsd4_lease; |
a832e7ae | 4700 | time_t t, new_timeo = nn->nfsd4_lease; |
1da177e4 | 4701 | |
1da177e4 | 4702 | dprintk("NFSD: laundromat service - starting\n"); |
12760c66 | 4703 | nfsd4_end_grace(nn); |
36acb66b | 4704 | INIT_LIST_HEAD(&reaplist); |
c9a49628 | 4705 | spin_lock(&nn->client_lock); |
5ed58bb2 | 4706 | list_for_each_safe(pos, next, &nn->client_lru) { |
1da177e4 LT |
4707 | clp = list_entry(pos, struct nfs4_client, cl_lru); |
4708 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
4709 | t = clp->cl_time - cutoff; | |
a832e7ae | 4710 | new_timeo = min(new_timeo, t); |
1da177e4 LT |
4711 | break; |
4712 | } | |
221a6876 | 4713 | if (mark_client_expired_locked(clp)) { |
d7682988 BH |
4714 | dprintk("NFSD: client in use (clientid %08x)\n", |
4715 | clp->cl_clientid.cl_id); | |
4716 | continue; | |
4717 | } | |
4864af97 | 4718 | list_add(&clp->cl_lru, &reaplist); |
36acb66b | 4719 | } |
c9a49628 | 4720 | spin_unlock(&nn->client_lock); |
36acb66b BH |
4721 | list_for_each_safe(pos, next, &reaplist) { |
4722 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
4723 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
4724 | clp->cl_clientid.cl_id); | |
4864af97 | 4725 | list_del_init(&clp->cl_lru); |
1da177e4 LT |
4726 | expire_client(clp); |
4727 | } | |
cdc97505 | 4728 | spin_lock(&state_lock); |
e8c69d17 | 4729 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 LT |
4730 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
4731 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
a832e7ae JL |
4732 | t = dp->dl_time - cutoff; |
4733 | new_timeo = min(new_timeo, t); | |
1da177e4 LT |
4734 | break; |
4735 | } | |
3fcbbd24 | 4736 | WARN_ON(!unhash_delegation_locked(dp)); |
42690676 | 4737 | list_add(&dp->dl_recall_lru, &reaplist); |
1da177e4 | 4738 | } |
cdc97505 | 4739 | spin_unlock(&state_lock); |
2d4a532d JL |
4740 | while (!list_empty(&reaplist)) { |
4741 | dp = list_first_entry(&reaplist, struct nfs4_delegation, | |
4742 | dl_recall_lru); | |
4743 | list_del_init(&dp->dl_recall_lru); | |
3bd64a5b | 4744 | revoke_delegation(dp); |
1da177e4 | 4745 | } |
217526e7 JL |
4746 | |
4747 | spin_lock(&nn->client_lock); | |
4748 | while (!list_empty(&nn->close_lru)) { | |
4749 | oo = list_first_entry(&nn->close_lru, struct nfs4_openowner, | |
4750 | oo_close_lru); | |
4751 | if (time_after((unsigned long)oo->oo_time, | |
4752 | (unsigned long)cutoff)) { | |
a832e7ae JL |
4753 | t = oo->oo_time - cutoff; |
4754 | new_timeo = min(new_timeo, t); | |
1da177e4 LT |
4755 | break; |
4756 | } | |
217526e7 JL |
4757 | list_del_init(&oo->oo_close_lru); |
4758 | stp = oo->oo_last_closed_stid; | |
4759 | oo->oo_last_closed_stid = NULL; | |
4760 | spin_unlock(&nn->client_lock); | |
4761 | nfs4_put_stid(&stp->st_stid); | |
4762 | spin_lock(&nn->client_lock); | |
1da177e4 | 4763 | } |
217526e7 JL |
4764 | spin_unlock(&nn->client_lock); |
4765 | ||
7919d0a2 JL |
4766 | /* |
4767 | * It's possible for a client to try and acquire an already held lock | |
4768 | * that is being held for a long time, and then lose interest in it. | |
4769 | * So, we clean out any un-revisited request after a lease period | |
4770 | * under the assumption that the client is no longer interested. | |
4771 | * | |
4772 | * RFC5661, sec. 9.6 states that the client must not rely on getting | |
4773 | * notifications and must continue to poll for locks, even when the | |
4774 | * server supports them. Thus this shouldn't lead to clients blocking | |
4775 | * indefinitely once the lock does become free. | |
4776 | */ | |
4777 | BUG_ON(!list_empty(&reaplist)); | |
0cc11a61 | 4778 | spin_lock(&nn->blocked_locks_lock); |
7919d0a2 JL |
4779 | while (!list_empty(&nn->blocked_locks_lru)) { |
4780 | nbl = list_first_entry(&nn->blocked_locks_lru, | |
4781 | struct nfsd4_blocked_lock, nbl_lru); | |
4782 | if (time_after((unsigned long)nbl->nbl_time, | |
4783 | (unsigned long)cutoff)) { | |
4784 | t = nbl->nbl_time - cutoff; | |
4785 | new_timeo = min(new_timeo, t); | |
4786 | break; | |
4787 | } | |
4788 | list_move(&nbl->nbl_lru, &reaplist); | |
4789 | list_del_init(&nbl->nbl_list); | |
4790 | } | |
0cc11a61 | 4791 | spin_unlock(&nn->blocked_locks_lock); |
7919d0a2 JL |
4792 | |
4793 | while (!list_empty(&reaplist)) { | |
64ebe124 | 4794 | nbl = list_first_entry(&reaplist, |
7919d0a2 JL |
4795 | struct nfsd4_blocked_lock, nbl_lru); |
4796 | list_del_init(&nbl->nbl_lru); | |
4797 | posix_unblock_lock(&nbl->nbl_lock); | |
4798 | free_blocked_lock(nbl); | |
4799 | } | |
4800 | ||
a832e7ae | 4801 | new_timeo = max_t(time_t, new_timeo, NFSD_LAUNDROMAT_MINTIMEOUT); |
a832e7ae | 4802 | return new_timeo; |
1da177e4 LT |
4803 | } |
4804 | ||
a254b246 HH |
4805 | static struct workqueue_struct *laundry_wq; |
4806 | static void laundromat_main(struct work_struct *); | |
a254b246 HH |
4807 | |
4808 | static void | |
09121281 | 4809 | laundromat_main(struct work_struct *laundry) |
1da177e4 LT |
4810 | { |
4811 | time_t t; | |
2e55f3ab | 4812 | struct delayed_work *dwork = to_delayed_work(laundry); |
09121281 SK |
4813 | struct nfsd_net *nn = container_of(dwork, struct nfsd_net, |
4814 | laundromat_work); | |
1da177e4 | 4815 | |
09121281 | 4816 | t = nfs4_laundromat(nn); |
1da177e4 | 4817 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); |
09121281 | 4818 | queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ); |
1da177e4 LT |
4819 | } |
4820 | ||
8fcd461d | 4821 | static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stid *stp) |
1da177e4 | 4822 | { |
8fcd461d | 4823 | if (!fh_match(&fhp->fh_handle, &stp->sc_file->fi_fhandle)) |
f7a4d872 BF |
4824 | return nfserr_bad_stateid; |
4825 | return nfs_ok; | |
1da177e4 LT |
4826 | } |
4827 | ||
1da177e4 | 4828 | static inline int |
82c5ff1b | 4829 | access_permit_read(struct nfs4_ol_stateid *stp) |
1da177e4 | 4830 | { |
82c5ff1b JL |
4831 | return test_access(NFS4_SHARE_ACCESS_READ, stp) || |
4832 | test_access(NFS4_SHARE_ACCESS_BOTH, stp) || | |
4833 | test_access(NFS4_SHARE_ACCESS_WRITE, stp); | |
1da177e4 LT |
4834 | } |
4835 | ||
4836 | static inline int | |
82c5ff1b | 4837 | access_permit_write(struct nfs4_ol_stateid *stp) |
1da177e4 | 4838 | { |
82c5ff1b JL |
4839 | return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || |
4840 | test_access(NFS4_SHARE_ACCESS_BOTH, stp); | |
1da177e4 LT |
4841 | } |
4842 | ||
4843 | static | |
dcef0413 | 4844 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
1da177e4 | 4845 | { |
b37ad28b | 4846 | __be32 status = nfserr_openmode; |
1da177e4 | 4847 | |
02921914 BF |
4848 | /* For lock stateid's, we test the parent open, not the lock: */ |
4849 | if (stp->st_openstp) | |
4850 | stp = stp->st_openstp; | |
82c5ff1b | 4851 | if ((flags & WR_STATE) && !access_permit_write(stp)) |
1da177e4 | 4852 | goto out; |
82c5ff1b | 4853 | if ((flags & RD_STATE) && !access_permit_read(stp)) |
1da177e4 LT |
4854 | goto out; |
4855 | status = nfs_ok; | |
4856 | out: | |
4857 | return status; | |
4858 | } | |
4859 | ||
b37ad28b | 4860 | static inline __be32 |
5ccb0066 | 4861 | check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags) |
1da177e4 | 4862 | { |
203a8c8e | 4863 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 4864 | return nfs_ok; |
c87fb4a3 | 4865 | else if (opens_in_grace(net)) { |
25985edc | 4866 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
4867 | * conflicting state; so we must wait out the grace period. */ |
4868 | return nfserr_grace; | |
4869 | } else if (flags & WR_STATE) | |
4870 | return nfs4_share_conflict(current_fh, | |
4871 | NFS4_SHARE_DENY_WRITE); | |
4872 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
4873 | return nfs4_share_conflict(current_fh, | |
4874 | NFS4_SHARE_DENY_READ); | |
4875 | } | |
4876 | ||
4877 | /* | |
4878 | * Allow READ/WRITE during grace period on recovered state only for files | |
4879 | * that are not able to provide mandatory locking. | |
4880 | */ | |
4881 | static inline int | |
5ccb0066 | 4882 | grace_disallows_io(struct net *net, struct inode *inode) |
1da177e4 | 4883 | { |
c87fb4a3 | 4884 | return opens_in_grace(net) && mandatory_lock(inode); |
1da177e4 LT |
4885 | } |
4886 | ||
57b7b43b | 4887 | static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 4888 | { |
6668958f AA |
4889 | /* |
4890 | * When sessions are used the stateid generation number is ignored | |
4891 | * when it is zero. | |
4892 | */ | |
28dde241 | 4893 | if (has_session && in->si_generation == 0) |
81b82965 BF |
4894 | return nfs_ok; |
4895 | ||
4896 | if (in->si_generation == ref->si_generation) | |
4897 | return nfs_ok; | |
6668958f | 4898 | |
0836f587 | 4899 | /* If the client sends us a stateid from the future, it's buggy: */ |
14b7f4a1 | 4900 | if (nfsd4_stateid_generation_after(in, ref)) |
0836f587 BF |
4901 | return nfserr_bad_stateid; |
4902 | /* | |
81b82965 BF |
4903 | * However, we could see a stateid from the past, even from a |
4904 | * non-buggy client. For example, if the client sends a lock | |
4905 | * while some IO is outstanding, the lock may bump si_generation | |
4906 | * while the IO is still in flight. The client could avoid that | |
4907 | * situation by waiting for responses on all the IO requests, | |
4908 | * but better performance may result in retrying IO that | |
4909 | * receives an old_stateid error if requests are rarely | |
4910 | * reordered in flight: | |
0836f587 | 4911 | */ |
81b82965 | 4912 | return nfserr_old_stateid; |
0836f587 BF |
4913 | } |
4914 | ||
03da3169 TM |
4915 | static __be32 nfsd4_stid_check_stateid_generation(stateid_t *in, struct nfs4_stid *s, bool has_session) |
4916 | { | |
4917 | __be32 ret; | |
4918 | ||
4919 | spin_lock(&s->sc_lock); | |
4920 | ret = nfsd4_verify_open_stid(s); | |
4921 | if (ret == nfs_ok) | |
4922 | ret = check_stateid_generation(in, &s->sc_stateid, has_session); | |
4923 | spin_unlock(&s->sc_lock); | |
4924 | return ret; | |
4925 | } | |
4926 | ||
ebe9cb3b CH |
4927 | static __be32 nfsd4_check_openowner_confirmed(struct nfs4_ol_stateid *ols) |
4928 | { | |
4929 | if (ols->st_stateowner->so_is_open_owner && | |
4930 | !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) | |
4931 | return nfserr_bad_stateid; | |
4932 | return nfs_ok; | |
4933 | } | |
4934 | ||
7df302f7 | 4935 | static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) |
17456804 | 4936 | { |
97b7e3b6 | 4937 | struct nfs4_stid *s; |
1af71cc8 | 4938 | __be32 status = nfserr_bad_stateid; |
17456804 | 4939 | |
ae254dac AE |
4940 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid) || |
4941 | CLOSE_STATEID(stateid)) | |
1af71cc8 | 4942 | return status; |
7df302f7 CL |
4943 | /* Client debugging aid. */ |
4944 | if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) { | |
4945 | char addr_str[INET6_ADDRSTRLEN]; | |
4946 | rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str, | |
4947 | sizeof(addr_str)); | |
4948 | pr_warn_ratelimited("NFSD: client %s testing state ID " | |
4949 | "with incorrect client ID\n", addr_str); | |
1af71cc8 | 4950 | return status; |
7df302f7 | 4951 | } |
1af71cc8 JL |
4952 | spin_lock(&cl->cl_lock); |
4953 | s = find_stateid_locked(cl, stateid); | |
97b7e3b6 | 4954 | if (!s) |
1af71cc8 | 4955 | goto out_unlock; |
03da3169 | 4956 | status = nfsd4_stid_check_stateid_generation(stateid, s, 1); |
17456804 | 4957 | if (status) |
1af71cc8 | 4958 | goto out_unlock; |
23340032 BF |
4959 | switch (s->sc_type) { |
4960 | case NFS4_DELEG_STID: | |
1af71cc8 JL |
4961 | status = nfs_ok; |
4962 | break; | |
3bd64a5b | 4963 | case NFS4_REVOKED_DELEG_STID: |
1af71cc8 JL |
4964 | status = nfserr_deleg_revoked; |
4965 | break; | |
23340032 BF |
4966 | case NFS4_OPEN_STID: |
4967 | case NFS4_LOCK_STID: | |
ebe9cb3b | 4968 | status = nfsd4_check_openowner_confirmed(openlockstateid(s)); |
1af71cc8 | 4969 | break; |
23340032 BF |
4970 | default: |
4971 | printk("unknown stateid type %x\n", s->sc_type); | |
b0fc29d6 | 4972 | /* Fallthrough */ |
23340032 | 4973 | case NFS4_CLOSED_STID: |
b0fc29d6 | 4974 | case NFS4_CLOSED_DELEG_STID: |
1af71cc8 | 4975 | status = nfserr_bad_stateid; |
23340032 | 4976 | } |
1af71cc8 JL |
4977 | out_unlock: |
4978 | spin_unlock(&cl->cl_lock); | |
4979 | return status; | |
17456804 BS |
4980 | } |
4981 | ||
cd61c522 | 4982 | __be32 |
2dd6e458 TM |
4983 | nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate, |
4984 | stateid_t *stateid, unsigned char typemask, | |
4985 | struct nfs4_stid **s, struct nfsd_net *nn) | |
38c2f4b1 | 4986 | { |
0eb6f20a | 4987 | __be32 status; |
95da1b3a AE |
4988 | bool return_revoked = false; |
4989 | ||
4990 | /* | |
4991 | * only return revoked delegations if explicitly asked. | |
4992 | * otherwise we report revoked or bad_stateid status. | |
4993 | */ | |
4994 | if (typemask & NFS4_REVOKED_DELEG_STID) | |
4995 | return_revoked = true; | |
4996 | else if (typemask & NFS4_DELEG_STID) | |
4997 | typemask |= NFS4_REVOKED_DELEG_STID; | |
38c2f4b1 | 4998 | |
ae254dac AE |
4999 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid) || |
5000 | CLOSE_STATEID(stateid)) | |
38c2f4b1 | 5001 | return nfserr_bad_stateid; |
4b24ca7d | 5002 | status = lookup_clientid(&stateid->si_opaque.so_clid, cstate, nn); |
a8a7c677 | 5003 | if (status == nfserr_stale_clientid) { |
4b24ca7d | 5004 | if (cstate->session) |
a8a7c677 | 5005 | return nfserr_bad_stateid; |
38c2f4b1 | 5006 | return nfserr_stale_stateid; |
a8a7c677 | 5007 | } |
0eb6f20a BF |
5008 | if (status) |
5009 | return status; | |
4b24ca7d | 5010 | *s = find_stateid_by_type(cstate->clp, stateid, typemask); |
38c2f4b1 BF |
5011 | if (!*s) |
5012 | return nfserr_bad_stateid; | |
95da1b3a AE |
5013 | if (((*s)->sc_type == NFS4_REVOKED_DELEG_STID) && !return_revoked) { |
5014 | nfs4_put_stid(*s); | |
5015 | if (cstate->minorversion) | |
5016 | return nfserr_deleg_revoked; | |
5017 | return nfserr_bad_stateid; | |
5018 | } | |
38c2f4b1 | 5019 | return nfs_ok; |
38c2f4b1 BF |
5020 | } |
5021 | ||
a0649b2d CH |
5022 | static struct file * |
5023 | nfs4_find_file(struct nfs4_stid *s, int flags) | |
5024 | { | |
af90f707 CH |
5025 | if (!s) |
5026 | return NULL; | |
5027 | ||
a0649b2d CH |
5028 | switch (s->sc_type) { |
5029 | case NFS4_DELEG_STID: | |
5030 | if (WARN_ON_ONCE(!s->sc_file->fi_deleg_file)) | |
5031 | return NULL; | |
5032 | return get_file(s->sc_file->fi_deleg_file); | |
5033 | case NFS4_OPEN_STID: | |
5034 | case NFS4_LOCK_STID: | |
5035 | if (flags & RD_STATE) | |
5036 | return find_readable_file(s->sc_file); | |
5037 | else | |
5038 | return find_writeable_file(s->sc_file); | |
5039 | break; | |
5040 | } | |
5041 | ||
5042 | return NULL; | |
5043 | } | |
5044 | ||
5045 | static __be32 | |
5046 | nfs4_check_olstateid(struct svc_fh *fhp, struct nfs4_ol_stateid *ols, int flags) | |
5047 | { | |
5048 | __be32 status; | |
5049 | ||
a0649b2d CH |
5050 | status = nfsd4_check_openowner_confirmed(ols); |
5051 | if (status) | |
5052 | return status; | |
5053 | return nfs4_check_openmode(ols, flags); | |
5054 | } | |
5055 | ||
af90f707 CH |
5056 | static __be32 |
5057 | nfs4_check_file(struct svc_rqst *rqstp, struct svc_fh *fhp, struct nfs4_stid *s, | |
5058 | struct file **filpp, bool *tmp_file, int flags) | |
5059 | { | |
5060 | int acc = (flags & RD_STATE) ? NFSD_MAY_READ : NFSD_MAY_WRITE; | |
5061 | struct file *file; | |
5062 | __be32 status; | |
5063 | ||
5064 | file = nfs4_find_file(s, flags); | |
5065 | if (file) { | |
5066 | status = nfsd_permission(rqstp, fhp->fh_export, fhp->fh_dentry, | |
5067 | acc | NFSD_MAY_OWNER_OVERRIDE); | |
5068 | if (status) { | |
5069 | fput(file); | |
5070 | return status; | |
5071 | } | |
5072 | ||
5073 | *filpp = file; | |
5074 | } else { | |
5075 | status = nfsd_open(rqstp, fhp, S_IFREG, acc, filpp); | |
5076 | if (status) | |
5077 | return status; | |
5078 | ||
5079 | if (tmp_file) | |
5080 | *tmp_file = true; | |
5081 | } | |
5082 | ||
5083 | return 0; | |
5084 | } | |
5085 | ||
1da177e4 | 5086 | /* |
a0649b2d CH |
5087 | * Checks for stateid operations |
5088 | */ | |
b37ad28b | 5089 | __be32 |
af90f707 | 5090 | nfs4_preprocess_stateid_op(struct svc_rqst *rqstp, |
aa0d6aed AS |
5091 | struct nfsd4_compound_state *cstate, struct svc_fh *fhp, |
5092 | stateid_t *stateid, int flags, struct file **filpp, bool *tmp_file) | |
1da177e4 | 5093 | { |
a0649b2d | 5094 | struct inode *ino = d_inode(fhp->fh_dentry); |
af90f707 | 5095 | struct net *net = SVC_NET(rqstp); |
3320fef1 | 5096 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
af90f707 | 5097 | struct nfs4_stid *s = NULL; |
b37ad28b | 5098 | __be32 status; |
1da177e4 | 5099 | |
1da177e4 LT |
5100 | if (filpp) |
5101 | *filpp = NULL; | |
af90f707 CH |
5102 | if (tmp_file) |
5103 | *tmp_file = false; | |
1da177e4 | 5104 | |
5ccb0066 | 5105 | if (grace_disallows_io(net, ino)) |
1da177e4 LT |
5106 | return nfserr_grace; |
5107 | ||
af90f707 CH |
5108 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { |
5109 | status = check_special_stateids(net, fhp, stateid, flags); | |
5110 | goto done; | |
5111 | } | |
1da177e4 | 5112 | |
2dd6e458 | 5113 | status = nfsd4_lookup_stateid(cstate, stateid, |
db24b3b4 | 5114 | NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, |
2dd6e458 | 5115 | &s, nn); |
38c2f4b1 | 5116 | if (status) |
c2d1d6a8 | 5117 | return status; |
03da3169 | 5118 | status = nfsd4_stid_check_stateid_generation(stateid, s, |
a0649b2d | 5119 | nfsd4_has_session(cstate)); |
69064a27 BF |
5120 | if (status) |
5121 | goto out; | |
a0649b2d | 5122 | |
f7a4d872 BF |
5123 | switch (s->sc_type) { |
5124 | case NFS4_DELEG_STID: | |
a0649b2d | 5125 | status = nfs4_check_delegmode(delegstateid(s), flags); |
f7a4d872 BF |
5126 | break; |
5127 | case NFS4_OPEN_STID: | |
5128 | case NFS4_LOCK_STID: | |
a0649b2d | 5129 | status = nfs4_check_olstateid(fhp, openlockstateid(s), flags); |
f7a4d872 BF |
5130 | break; |
5131 | default: | |
14bcab1a | 5132 | status = nfserr_bad_stateid; |
a0649b2d CH |
5133 | break; |
5134 | } | |
8fcd461d JL |
5135 | if (status) |
5136 | goto out; | |
5137 | status = nfs4_check_fh(fhp, s); | |
a0649b2d | 5138 | |
af90f707 CH |
5139 | done: |
5140 | if (!status && filpp) | |
5141 | status = nfs4_check_file(rqstp, fhp, s, filpp, tmp_file, flags); | |
1da177e4 | 5142 | out: |
af90f707 CH |
5143 | if (s) |
5144 | nfs4_put_stid(s); | |
1da177e4 LT |
5145 | return status; |
5146 | } | |
5147 | ||
17456804 BS |
5148 | /* |
5149 | * Test if the stateid is valid | |
5150 | */ | |
5151 | __be32 | |
5152 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
eb69853d | 5153 | union nfsd4_op_u *u) |
17456804 | 5154 | { |
eb69853d | 5155 | struct nfsd4_test_stateid *test_stateid = &u->test_stateid; |
03cfb420 BS |
5156 | struct nfsd4_test_stateid_id *stateid; |
5157 | struct nfs4_client *cl = cstate->session->se_client; | |
5158 | ||
03cfb420 | 5159 | list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) |
7df302f7 CL |
5160 | stateid->ts_id_status = |
5161 | nfsd4_validate_stateid(cl, &stateid->ts_id_stateid); | |
03cfb420 | 5162 | |
17456804 BS |
5163 | return nfs_ok; |
5164 | } | |
5165 | ||
42691398 CL |
5166 | static __be32 |
5167 | nfsd4_free_lock_stateid(stateid_t *stateid, struct nfs4_stid *s) | |
5168 | { | |
5169 | struct nfs4_ol_stateid *stp = openlockstateid(s); | |
5170 | __be32 ret; | |
5171 | ||
659aefb6 TM |
5172 | ret = nfsd4_lock_ol_stateid(stp); |
5173 | if (ret) | |
5174 | goto out_put_stid; | |
42691398 CL |
5175 | |
5176 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); | |
5177 | if (ret) | |
5178 | goto out; | |
5179 | ||
5180 | ret = nfserr_locks_held; | |
5181 | if (check_for_locks(stp->st_stid.sc_file, | |
5182 | lockowner(stp->st_stateowner))) | |
5183 | goto out; | |
5184 | ||
659aefb6 | 5185 | stp->st_stid.sc_type = NFS4_CLOSED_STID; |
42691398 CL |
5186 | release_lock_stateid(stp); |
5187 | ret = nfs_ok; | |
5188 | ||
5189 | out: | |
5190 | mutex_unlock(&stp->st_mutex); | |
659aefb6 | 5191 | out_put_stid: |
42691398 CL |
5192 | nfs4_put_stid(s); |
5193 | return ret; | |
5194 | } | |
5195 | ||
e1ca12df BS |
5196 | __be32 |
5197 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
eb69853d | 5198 | union nfsd4_op_u *u) |
e1ca12df | 5199 | { |
eb69853d | 5200 | struct nfsd4_free_stateid *free_stateid = &u->free_stateid; |
e1ca12df | 5201 | stateid_t *stateid = &free_stateid->fr_stateid; |
2da1cec7 | 5202 | struct nfs4_stid *s; |
3bd64a5b | 5203 | struct nfs4_delegation *dp; |
38c2f4b1 | 5204 | struct nfs4_client *cl = cstate->session->se_client; |
2da1cec7 | 5205 | __be32 ret = nfserr_bad_stateid; |
e1ca12df | 5206 | |
1af71cc8 JL |
5207 | spin_lock(&cl->cl_lock); |
5208 | s = find_stateid_locked(cl, stateid); | |
2da1cec7 | 5209 | if (!s) |
1af71cc8 | 5210 | goto out_unlock; |
03da3169 | 5211 | spin_lock(&s->sc_lock); |
2da1cec7 BF |
5212 | switch (s->sc_type) { |
5213 | case NFS4_DELEG_STID: | |
e1ca12df | 5214 | ret = nfserr_locks_held; |
1af71cc8 | 5215 | break; |
2da1cec7 | 5216 | case NFS4_OPEN_STID: |
2da1cec7 BF |
5217 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); |
5218 | if (ret) | |
1af71cc8 JL |
5219 | break; |
5220 | ret = nfserr_locks_held; | |
f7a4d872 | 5221 | break; |
1af71cc8 | 5222 | case NFS4_LOCK_STID: |
03da3169 | 5223 | spin_unlock(&s->sc_lock); |
a15dfcd5 | 5224 | refcount_inc(&s->sc_count); |
1af71cc8 | 5225 | spin_unlock(&cl->cl_lock); |
42691398 | 5226 | ret = nfsd4_free_lock_stateid(stateid, s); |
1af71cc8 | 5227 | goto out; |
3bd64a5b | 5228 | case NFS4_REVOKED_DELEG_STID: |
03da3169 | 5229 | spin_unlock(&s->sc_lock); |
3bd64a5b | 5230 | dp = delegstateid(s); |
2d4a532d JL |
5231 | list_del_init(&dp->dl_recall_lru); |
5232 | spin_unlock(&cl->cl_lock); | |
6011695d | 5233 | nfs4_put_stid(s); |
3bd64a5b | 5234 | ret = nfs_ok; |
1af71cc8 JL |
5235 | goto out; |
5236 | /* Default falls through and returns nfserr_bad_stateid */ | |
e1ca12df | 5237 | } |
03da3169 | 5238 | spin_unlock(&s->sc_lock); |
1af71cc8 JL |
5239 | out_unlock: |
5240 | spin_unlock(&cl->cl_lock); | |
e1ca12df | 5241 | out: |
e1ca12df BS |
5242 | return ret; |
5243 | } | |
5244 | ||
4c4cd222 N |
5245 | static inline int |
5246 | setlkflg (int type) | |
5247 | { | |
5248 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
5249 | RD_STATE : WR_STATE; | |
5250 | } | |
1da177e4 | 5251 | |
dcef0413 | 5252 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
c0a5d93e BF |
5253 | { |
5254 | struct svc_fh *current_fh = &cstate->current_fh; | |
5255 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
5256 | __be32 status; | |
5257 | ||
c0a5d93e BF |
5258 | status = nfsd4_check_seqid(cstate, sop, seqid); |
5259 | if (status) | |
5260 | return status; | |
9271d7e5 TM |
5261 | status = nfsd4_lock_ol_stateid(stp); |
5262 | if (status != nfs_ok) | |
5263 | return status; | |
f7a4d872 | 5264 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); |
35a92fe8 JL |
5265 | if (status == nfs_ok) |
5266 | status = nfs4_check_fh(current_fh, &stp->st_stid); | |
5267 | if (status != nfs_ok) | |
feb9dad5 | 5268 | mutex_unlock(&stp->st_mutex); |
35a92fe8 | 5269 | return status; |
c0a5d93e BF |
5270 | } |
5271 | ||
1da177e4 LT |
5272 | /* |
5273 | * Checks for sequence id mutating operations. | |
5274 | */ | |
b37ad28b | 5275 | static __be32 |
dd453dfd | 5276 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2288d0e3 | 5277 | stateid_t *stateid, char typemask, |
3320fef1 SK |
5278 | struct nfs4_ol_stateid **stpp, |
5279 | struct nfsd_net *nn) | |
1da177e4 | 5280 | { |
0836f587 | 5281 | __be32 status; |
38c2f4b1 | 5282 | struct nfs4_stid *s; |
e17f99b7 | 5283 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 5284 | |
8c10cbdb BH |
5285 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
5286 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 5287 | |
1da177e4 | 5288 | *stpp = NULL; |
2dd6e458 | 5289 | status = nfsd4_lookup_stateid(cstate, stateid, typemask, &s, nn); |
c0a5d93e BF |
5290 | if (status) |
5291 | return status; | |
e17f99b7 | 5292 | stp = openlockstateid(s); |
58fb12e6 | 5293 | nfsd4_cstate_assign_replay(cstate, stp->st_stateowner); |
1da177e4 | 5294 | |
e17f99b7 | 5295 | status = nfs4_seqid_op_checks(cstate, stateid, seqid, stp); |
fd911011 | 5296 | if (!status) |
e17f99b7 | 5297 | *stpp = stp; |
fd911011 TM |
5298 | else |
5299 | nfs4_put_stid(&stp->st_stid); | |
e17f99b7 | 5300 | return status; |
c0a5d93e | 5301 | } |
39325bd0 | 5302 | |
3320fef1 SK |
5303 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
5304 | stateid_t *stateid, struct nfs4_ol_stateid **stpp, struct nfsd_net *nn) | |
c0a5d93e BF |
5305 | { |
5306 | __be32 status; | |
5307 | struct nfs4_openowner *oo; | |
4cbfc9f7 | 5308 | struct nfs4_ol_stateid *stp; |
1da177e4 | 5309 | |
c0a5d93e | 5310 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
4cbfc9f7 | 5311 | NFS4_OPEN_STID, &stp, nn); |
7a8711c9 BF |
5312 | if (status) |
5313 | return status; | |
4cbfc9f7 TM |
5314 | oo = openowner(stp->st_stateowner); |
5315 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { | |
feb9dad5 | 5316 | mutex_unlock(&stp->st_mutex); |
4cbfc9f7 | 5317 | nfs4_put_stid(&stp->st_stid); |
3a4f98bb | 5318 | return nfserr_bad_stateid; |
4cbfc9f7 TM |
5319 | } |
5320 | *stpp = stp; | |
3a4f98bb | 5321 | return nfs_ok; |
1da177e4 LT |
5322 | } |
5323 | ||
b37ad28b | 5324 | __be32 |
ca364317 | 5325 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 5326 | union nfsd4_op_u *u) |
1da177e4 | 5327 | { |
eb69853d | 5328 | struct nfsd4_open_confirm *oc = &u->open_confirm; |
b37ad28b | 5329 | __be32 status; |
fe0750e5 | 5330 | struct nfs4_openowner *oo; |
dcef0413 | 5331 | struct nfs4_ol_stateid *stp; |
3320fef1 | 5332 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 5333 | |
a6a9f18f AV |
5334 | dprintk("NFSD: nfsd4_open_confirm on file %pd\n", |
5335 | cstate->current_fh.fh_dentry); | |
1da177e4 | 5336 | |
ca364317 | 5337 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
5338 | if (status) |
5339 | return status; | |
1da177e4 | 5340 | |
9072d5c6 | 5341 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 5342 | oc->oc_seqid, &oc->oc_req_stateid, |
3320fef1 | 5343 | NFS4_OPEN_STID, &stp, nn); |
9072d5c6 | 5344 | if (status) |
68b66e82 | 5345 | goto out; |
fe0750e5 | 5346 | oo = openowner(stp->st_stateowner); |
68b66e82 | 5347 | status = nfserr_bad_stateid; |
35a92fe8 | 5348 | if (oo->oo_flags & NFS4_OO_CONFIRMED) { |
feb9dad5 | 5349 | mutex_unlock(&stp->st_mutex); |
2585fc79 | 5350 | goto put_stateid; |
35a92fe8 | 5351 | } |
dad1c067 | 5352 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
9767feb2 | 5353 | nfs4_inc_and_copy_stateid(&oc->oc_resp_stateid, &stp->st_stid); |
feb9dad5 | 5354 | mutex_unlock(&stp->st_mutex); |
8c10cbdb | 5355 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
dcef0413 | 5356 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); |
c7b9a459 | 5357 | |
2a4317c5 | 5358 | nfsd4_client_record_create(oo->oo_owner.so_client); |
68b66e82 | 5359 | status = nfs_ok; |
2585fc79 TM |
5360 | put_stateid: |
5361 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 5362 | out: |
9411b1d4 | 5363 | nfsd4_bump_seqid(cstate, status); |
1da177e4 LT |
5364 | return status; |
5365 | } | |
5366 | ||
6409a5a6 | 5367 | static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) |
1da177e4 | 5368 | { |
82c5ff1b | 5369 | if (!test_access(access, stp)) |
6409a5a6 | 5370 | return; |
11b9164a | 5371 | nfs4_file_put_access(stp->st_stid.sc_file, access); |
82c5ff1b | 5372 | clear_access(access, stp); |
6409a5a6 | 5373 | } |
f197c271 | 5374 | |
6409a5a6 BF |
5375 | static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) |
5376 | { | |
5377 | switch (to_access) { | |
5378 | case NFS4_SHARE_ACCESS_READ: | |
5379 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); | |
5380 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
5381 | break; | |
5382 | case NFS4_SHARE_ACCESS_WRITE: | |
5383 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); | |
5384 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
5385 | break; | |
5386 | case NFS4_SHARE_ACCESS_BOTH: | |
5387 | break; | |
5388 | default: | |
063b0fb9 | 5389 | WARN_ON_ONCE(1); |
1da177e4 LT |
5390 | } |
5391 | } | |
5392 | ||
b37ad28b | 5393 | __be32 |
ca364317 | 5394 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
eb69853d | 5395 | struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) |
1da177e4 | 5396 | { |
eb69853d | 5397 | struct nfsd4_open_downgrade *od = &u->open_downgrade; |
b37ad28b | 5398 | __be32 status; |
dcef0413 | 5399 | struct nfs4_ol_stateid *stp; |
3320fef1 | 5400 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 5401 | |
a6a9f18f AV |
5402 | dprintk("NFSD: nfsd4_open_downgrade on file %pd\n", |
5403 | cstate->current_fh.fh_dentry); | |
1da177e4 | 5404 | |
c30e92df | 5405 | /* We don't yet support WANT bits: */ |
2c8bd7e0 BH |
5406 | if (od->od_deleg_want) |
5407 | dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, | |
5408 | od->od_deleg_want); | |
1da177e4 | 5409 | |
c0a5d93e | 5410 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
3320fef1 | 5411 | &od->od_stateid, &stp, nn); |
9072d5c6 | 5412 | if (status) |
1da177e4 | 5413 | goto out; |
1da177e4 | 5414 | status = nfserr_inval; |
82c5ff1b | 5415 | if (!test_access(od->od_share_access, stp)) { |
c11c591f | 5416 | dprintk("NFSD: access not a subset of current bitmap: 0x%hhx, input access=%08x\n", |
1da177e4 | 5417 | stp->st_access_bmap, od->od_share_access); |
0667b1e9 | 5418 | goto put_stateid; |
1da177e4 | 5419 | } |
ce0fc43c | 5420 | if (!test_deny(od->od_share_deny, stp)) { |
c11c591f | 5421 | dprintk("NFSD: deny not a subset of current bitmap: 0x%hhx, input deny=%08x\n", |
1da177e4 | 5422 | stp->st_deny_bmap, od->od_share_deny); |
0667b1e9 | 5423 | goto put_stateid; |
1da177e4 | 5424 | } |
6409a5a6 | 5425 | nfs4_stateid_downgrade(stp, od->od_share_access); |
ce0fc43c | 5426 | reset_union_bmap_deny(od->od_share_deny, stp); |
9767feb2 | 5427 | nfs4_inc_and_copy_stateid(&od->od_stateid, &stp->st_stid); |
1da177e4 | 5428 | status = nfs_ok; |
0667b1e9 | 5429 | put_stateid: |
feb9dad5 | 5430 | mutex_unlock(&stp->st_mutex); |
0667b1e9 | 5431 | nfs4_put_stid(&stp->st_stid); |
1da177e4 | 5432 | out: |
9411b1d4 | 5433 | nfsd4_bump_seqid(cstate, status); |
1da177e4 LT |
5434 | return status; |
5435 | } | |
5436 | ||
f7a4d872 BF |
5437 | static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) |
5438 | { | |
acf9295b | 5439 | struct nfs4_client *clp = s->st_stid.sc_client; |
e8568739 | 5440 | bool unhashed; |
d83017f9 | 5441 | LIST_HEAD(reaplist); |
acf9295b | 5442 | |
2c41beb0 | 5443 | spin_lock(&clp->cl_lock); |
e8568739 | 5444 | unhashed = unhash_open_stateid(s, &reaplist); |
acf9295b | 5445 | |
d83017f9 | 5446 | if (clp->cl_minorversion) { |
e8568739 JL |
5447 | if (unhashed) |
5448 | put_ol_stateid_locked(s, &reaplist); | |
d83017f9 JL |
5449 | spin_unlock(&clp->cl_lock); |
5450 | free_ol_stateid_reaplist(&reaplist); | |
5451 | } else { | |
5452 | spin_unlock(&clp->cl_lock); | |
5453 | free_ol_stateid_reaplist(&reaplist); | |
e8568739 JL |
5454 | if (unhashed) |
5455 | move_to_close_lru(s, clp->net); | |
d83017f9 | 5456 | } |
38c387b5 BF |
5457 | } |
5458 | ||
1da177e4 LT |
5459 | /* |
5460 | * nfs4_unlock_state() called after encode | |
5461 | */ | |
b37ad28b | 5462 | __be32 |
ca364317 | 5463 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 5464 | union nfsd4_op_u *u) |
1da177e4 | 5465 | { |
eb69853d | 5466 | struct nfsd4_close *close = &u->close; |
b37ad28b | 5467 | __be32 status; |
dcef0413 | 5468 | struct nfs4_ol_stateid *stp; |
3320fef1 SK |
5469 | struct net *net = SVC_NET(rqstp); |
5470 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 | 5471 | |
a6a9f18f AV |
5472 | dprintk("NFSD: nfsd4_close on file %pd\n", |
5473 | cstate->current_fh.fh_dentry); | |
1da177e4 | 5474 | |
f7a4d872 BF |
5475 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
5476 | &close->cl_stateid, | |
5477 | NFS4_OPEN_STID|NFS4_CLOSED_STID, | |
3320fef1 | 5478 | &stp, nn); |
9411b1d4 | 5479 | nfsd4_bump_seqid(cstate, status); |
9072d5c6 | 5480 | if (status) |
1da177e4 | 5481 | goto out; |
15ca08d3 TM |
5482 | |
5483 | stp->st_stid.sc_type = NFS4_CLOSED_STID; | |
9767feb2 | 5484 | nfs4_inc_and_copy_stateid(&close->cl_stateid, &stp->st_stid); |
1da177e4 | 5485 | |
f7a4d872 | 5486 | nfsd4_close_open_stateid(stp); |
15ca08d3 | 5487 | mutex_unlock(&stp->st_mutex); |
8a0b589d | 5488 | |
fb500a7c TM |
5489 | /* See RFC5661 sectionm 18.2.4 */ |
5490 | if (stp->st_stid.sc_client->cl_minorversion) | |
5491 | memcpy(&close->cl_stateid, &close_stateid, | |
5492 | sizeof(close->cl_stateid)); | |
5493 | ||
8a0b589d TM |
5494 | /* put reference from nfs4_preprocess_seqid_op */ |
5495 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 5496 | out: |
1da177e4 LT |
5497 | return status; |
5498 | } | |
5499 | ||
b37ad28b | 5500 | __be32 |
ca364317 | 5501 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 5502 | union nfsd4_op_u *u) |
1da177e4 | 5503 | { |
eb69853d | 5504 | struct nfsd4_delegreturn *dr = &u->delegreturn; |
203a8c8e BF |
5505 | struct nfs4_delegation *dp; |
5506 | stateid_t *stateid = &dr->dr_stateid; | |
38c2f4b1 | 5507 | struct nfs4_stid *s; |
b37ad28b | 5508 | __be32 status; |
3320fef1 | 5509 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 5510 | |
ca364317 | 5511 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e | 5512 | return status; |
1da177e4 | 5513 | |
2dd6e458 | 5514 | status = nfsd4_lookup_stateid(cstate, stateid, NFS4_DELEG_STID, &s, nn); |
38c2f4b1 | 5515 | if (status) |
203a8c8e | 5516 | goto out; |
38c2f4b1 | 5517 | dp = delegstateid(s); |
03da3169 | 5518 | status = nfsd4_stid_check_stateid_generation(stateid, &dp->dl_stid, nfsd4_has_session(cstate)); |
203a8c8e | 5519 | if (status) |
fd911011 | 5520 | goto put_stateid; |
203a8c8e | 5521 | |
3bd64a5b | 5522 | destroy_delegation(dp); |
fd911011 TM |
5523 | put_stateid: |
5524 | nfs4_put_stid(&dp->dl_stid); | |
1da177e4 LT |
5525 | out: |
5526 | return status; | |
5527 | } | |
5528 | ||
87df4de8 BH |
5529 | static inline u64 |
5530 | end_offset(u64 start, u64 len) | |
5531 | { | |
5532 | u64 end; | |
5533 | ||
5534 | end = start + len; | |
5535 | return end >= start ? end: NFS4_MAX_UINT64; | |
5536 | } | |
5537 | ||
5538 | /* last octet in a range */ | |
5539 | static inline u64 | |
5540 | last_byte_offset(u64 start, u64 len) | |
5541 | { | |
5542 | u64 end; | |
5543 | ||
063b0fb9 | 5544 | WARN_ON_ONCE(!len); |
87df4de8 BH |
5545 | end = start + len; |
5546 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
5547 | } | |
5548 | ||
1da177e4 LT |
5549 | /* |
5550 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
5551 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
5552 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
5553 | * locking, this prevents us from being completely protocol-compliant. The | |
5554 | * real solution to this problem is to start using unsigned file offsets in | |
5555 | * the VFS, but this is a very deep change! | |
5556 | */ | |
5557 | static inline void | |
5558 | nfs4_transform_lock_offset(struct file_lock *lock) | |
5559 | { | |
5560 | if (lock->fl_start < 0) | |
5561 | lock->fl_start = OFFSET_MAX; | |
5562 | if (lock->fl_end < 0) | |
5563 | lock->fl_end = OFFSET_MAX; | |
5564 | } | |
5565 | ||
cae80b30 JL |
5566 | static fl_owner_t |
5567 | nfsd4_fl_get_owner(fl_owner_t owner) | |
aef9583b | 5568 | { |
cae80b30 JL |
5569 | struct nfs4_lockowner *lo = (struct nfs4_lockowner *)owner; |
5570 | ||
5571 | nfs4_get_stateowner(&lo->lo_owner); | |
5572 | return owner; | |
aef9583b KM |
5573 | } |
5574 | ||
cae80b30 JL |
5575 | static void |
5576 | nfsd4_fl_put_owner(fl_owner_t owner) | |
aef9583b | 5577 | { |
cae80b30 | 5578 | struct nfs4_lockowner *lo = (struct nfs4_lockowner *)owner; |
aef9583b | 5579 | |
cae80b30 | 5580 | if (lo) |
aef9583b | 5581 | nfs4_put_stateowner(&lo->lo_owner); |
aef9583b KM |
5582 | } |
5583 | ||
76d348fa JL |
5584 | static void |
5585 | nfsd4_lm_notify(struct file_lock *fl) | |
5586 | { | |
5587 | struct nfs4_lockowner *lo = (struct nfs4_lockowner *)fl->fl_owner; | |
5588 | struct net *net = lo->lo_owner.so_client->net; | |
5589 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
5590 | struct nfsd4_blocked_lock *nbl = container_of(fl, | |
5591 | struct nfsd4_blocked_lock, nbl_lock); | |
5592 | bool queue = false; | |
5593 | ||
7919d0a2 | 5594 | /* An empty list means that something else is going to be using it */ |
0cc11a61 | 5595 | spin_lock(&nn->blocked_locks_lock); |
76d348fa JL |
5596 | if (!list_empty(&nbl->nbl_list)) { |
5597 | list_del_init(&nbl->nbl_list); | |
7919d0a2 | 5598 | list_del_init(&nbl->nbl_lru); |
76d348fa JL |
5599 | queue = true; |
5600 | } | |
0cc11a61 | 5601 | spin_unlock(&nn->blocked_locks_lock); |
76d348fa JL |
5602 | |
5603 | if (queue) | |
5604 | nfsd4_run_cb(&nbl->nbl_cb); | |
5605 | } | |
5606 | ||
7b021967 | 5607 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
76d348fa | 5608 | .lm_notify = nfsd4_lm_notify, |
aef9583b KM |
5609 | .lm_get_owner = nfsd4_fl_get_owner, |
5610 | .lm_put_owner = nfsd4_fl_put_owner, | |
d5b9026a | 5611 | }; |
1da177e4 LT |
5612 | |
5613 | static inline void | |
5614 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
5615 | { | |
fe0750e5 | 5616 | struct nfs4_lockowner *lo; |
1da177e4 | 5617 | |
d5b9026a | 5618 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 BF |
5619 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
5620 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, | |
5621 | lo->lo_owner.so_owner.len, GFP_KERNEL); | |
7c13f344 BF |
5622 | if (!deny->ld_owner.data) |
5623 | /* We just don't care that much */ | |
5624 | goto nevermind; | |
fe0750e5 BF |
5625 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
5626 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; | |
d5b9026a | 5627 | } else { |
7c13f344 BF |
5628 | nevermind: |
5629 | deny->ld_owner.len = 0; | |
5630 | deny->ld_owner.data = NULL; | |
d5b9026a N |
5631 | deny->ld_clientid.cl_boot = 0; |
5632 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
5633 | } |
5634 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
5635 | deny->ld_length = NFS4_MAX_UINT64; |
5636 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
5637 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
5638 | deny->ld_type = NFS4_READ_LT; | |
5639 | if (fl->fl_type != F_RDLCK) | |
5640 | deny->ld_type = NFS4_WRITE_LT; | |
5641 | } | |
5642 | ||
fe0750e5 | 5643 | static struct nfs4_lockowner * |
c8623999 | 5644 | find_lockowner_str_locked(struct nfs4_client *clp, struct xdr_netobj *owner) |
1da177e4 | 5645 | { |
d4f0489f | 5646 | unsigned int strhashval = ownerstr_hashval(owner); |
b3c32bcd | 5647 | struct nfs4_stateowner *so; |
1da177e4 | 5648 | |
0a880a28 TM |
5649 | lockdep_assert_held(&clp->cl_lock); |
5650 | ||
d4f0489f TM |
5651 | list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[strhashval], |
5652 | so_strhash) { | |
b3c32bcd TM |
5653 | if (so->so_is_open_owner) |
5654 | continue; | |
b5971afa KM |
5655 | if (same_owner_str(so, owner)) |
5656 | return lockowner(nfs4_get_stateowner(so)); | |
1da177e4 LT |
5657 | } |
5658 | return NULL; | |
5659 | } | |
5660 | ||
c58c6610 | 5661 | static struct nfs4_lockowner * |
c8623999 | 5662 | find_lockowner_str(struct nfs4_client *clp, struct xdr_netobj *owner) |
c58c6610 TM |
5663 | { |
5664 | struct nfs4_lockowner *lo; | |
5665 | ||
d4f0489f | 5666 | spin_lock(&clp->cl_lock); |
c8623999 | 5667 | lo = find_lockowner_str_locked(clp, owner); |
d4f0489f | 5668 | spin_unlock(&clp->cl_lock); |
c58c6610 TM |
5669 | return lo; |
5670 | } | |
5671 | ||
8f4b54c5 JL |
5672 | static void nfs4_unhash_lockowner(struct nfs4_stateowner *sop) |
5673 | { | |
c58c6610 | 5674 | unhash_lockowner_locked(lockowner(sop)); |
8f4b54c5 JL |
5675 | } |
5676 | ||
6b180f0b JL |
5677 | static void nfs4_free_lockowner(struct nfs4_stateowner *sop) |
5678 | { | |
5679 | struct nfs4_lockowner *lo = lockowner(sop); | |
5680 | ||
5681 | kmem_cache_free(lockowner_slab, lo); | |
5682 | } | |
5683 | ||
5684 | static const struct nfs4_stateowner_operations lockowner_ops = { | |
8f4b54c5 JL |
5685 | .so_unhash = nfs4_unhash_lockowner, |
5686 | .so_free = nfs4_free_lockowner, | |
6b180f0b JL |
5687 | }; |
5688 | ||
1da177e4 LT |
5689 | /* |
5690 | * Alloc a lock owner structure. | |
5691 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 5692 | * occurred. |
1da177e4 | 5693 | * |
16bfdaaf | 5694 | * strhashval = ownerstr_hashval |
1da177e4 | 5695 | */ |
fe0750e5 | 5696 | static struct nfs4_lockowner * |
c58c6610 TM |
5697 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, |
5698 | struct nfs4_ol_stateid *open_stp, | |
5699 | struct nfsd4_lock *lock) | |
5700 | { | |
c58c6610 | 5701 | struct nfs4_lockowner *lo, *ret; |
1da177e4 | 5702 | |
fe0750e5 BF |
5703 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
5704 | if (!lo) | |
1da177e4 | 5705 | return NULL; |
76d348fa | 5706 | INIT_LIST_HEAD(&lo->lo_blocked); |
fe0750e5 BF |
5707 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
5708 | lo->lo_owner.so_is_open_owner = 0; | |
5db1c03f | 5709 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid; |
6b180f0b | 5710 | lo->lo_owner.so_ops = &lockowner_ops; |
d4f0489f | 5711 | spin_lock(&clp->cl_lock); |
c8623999 | 5712 | ret = find_lockowner_str_locked(clp, &lock->lk_new_owner); |
c58c6610 TM |
5713 | if (ret == NULL) { |
5714 | list_add(&lo->lo_owner.so_strhash, | |
d4f0489f | 5715 | &clp->cl_ownerstr_hashtbl[strhashval]); |
c58c6610 TM |
5716 | ret = lo; |
5717 | } else | |
d50ffded KM |
5718 | nfs4_free_stateowner(&lo->lo_owner); |
5719 | ||
d4f0489f | 5720 | spin_unlock(&clp->cl_lock); |
340f0ba1 | 5721 | return ret; |
1da177e4 LT |
5722 | } |
5723 | ||
fd1fd685 TM |
5724 | static struct nfs4_ol_stateid * |
5725 | find_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp) | |
5726 | { | |
5727 | struct nfs4_ol_stateid *lst; | |
5728 | struct nfs4_client *clp = lo->lo_owner.so_client; | |
5729 | ||
5730 | lockdep_assert_held(&clp->cl_lock); | |
5731 | ||
5732 | list_for_each_entry(lst, &lo->lo_owner.so_stateids, st_perstateowner) { | |
5733 | if (lst->st_stid.sc_type != NFS4_LOCK_STID) | |
5734 | continue; | |
5735 | if (lst->st_stid.sc_file == fp) { | |
5736 | refcount_inc(&lst->st_stid.sc_count); | |
5737 | return lst; | |
5738 | } | |
5739 | } | |
5740 | return NULL; | |
5741 | } | |
5742 | ||
beeca19c | 5743 | static struct nfs4_ol_stateid * |
356a95ec JL |
5744 | init_lock_stateid(struct nfs4_ol_stateid *stp, struct nfs4_lockowner *lo, |
5745 | struct nfs4_file *fp, struct inode *inode, | |
5746 | struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 5747 | { |
d3b313a4 | 5748 | struct nfs4_client *clp = lo->lo_owner.so_client; |
beeca19c | 5749 | struct nfs4_ol_stateid *retstp; |
1da177e4 | 5750 | |
beeca19c | 5751 | mutex_init(&stp->st_mutex); |
4f34bd05 | 5752 | mutex_lock_nested(&stp->st_mutex, OPEN_STATEID_MUTEX); |
beeca19c TM |
5753 | retry: |
5754 | spin_lock(&clp->cl_lock); | |
5755 | spin_lock(&fp->fi_lock); | |
5756 | retstp = find_lock_stateid(lo, fp); | |
5757 | if (retstp) | |
5758 | goto out_unlock; | |
356a95ec | 5759 | |
a15dfcd5 | 5760 | refcount_inc(&stp->st_stid.sc_count); |
3abdb607 | 5761 | stp->st_stid.sc_type = NFS4_LOCK_STID; |
b5971afa | 5762 | stp->st_stateowner = nfs4_get_stateowner(&lo->lo_owner); |
13cd2184 | 5763 | get_nfs4_file(fp); |
11b9164a | 5764 | stp->st_stid.sc_file = fp; |
0997b173 | 5765 | stp->st_access_bmap = 0; |
1da177e4 | 5766 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 5767 | stp->st_openstp = open_stp; |
3c87b9b7 | 5768 | list_add(&stp->st_locks, &open_stp->st_locks); |
1c755dc1 | 5769 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
1d31a253 | 5770 | list_add(&stp->st_perfile, &fp->fi_stateids); |
beeca19c | 5771 | out_unlock: |
1d31a253 | 5772 | spin_unlock(&fp->fi_lock); |
beeca19c TM |
5773 | spin_unlock(&clp->cl_lock); |
5774 | if (retstp) { | |
5775 | if (nfsd4_lock_ol_stateid(retstp) != nfs_ok) { | |
5776 | nfs4_put_stid(&retstp->st_stid); | |
5777 | goto retry; | |
5778 | } | |
5779 | /* To keep mutex tracking happy */ | |
5780 | mutex_unlock(&stp->st_mutex); | |
5781 | stp = retstp; | |
5782 | } | |
5783 | return stp; | |
1da177e4 LT |
5784 | } |
5785 | ||
356a95ec JL |
5786 | static struct nfs4_ol_stateid * |
5787 | find_or_create_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fi, | |
5788 | struct inode *inode, struct nfs4_ol_stateid *ost, | |
5789 | bool *new) | |
5790 | { | |
5791 | struct nfs4_stid *ns = NULL; | |
5792 | struct nfs4_ol_stateid *lst; | |
5793 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); | |
5794 | struct nfs4_client *clp = oo->oo_owner.so_client; | |
5795 | ||
beeca19c | 5796 | *new = false; |
356a95ec JL |
5797 | spin_lock(&clp->cl_lock); |
5798 | lst = find_lock_stateid(lo, fi); | |
356a95ec | 5799 | spin_unlock(&clp->cl_lock); |
beeca19c TM |
5800 | if (lst != NULL) { |
5801 | if (nfsd4_lock_ol_stateid(lst) == nfs_ok) | |
5802 | goto out; | |
5803 | nfs4_put_stid(&lst->st_stid); | |
5804 | } | |
5805 | ns = nfs4_alloc_stid(clp, stateid_slab, nfs4_free_lock_stateid); | |
5806 | if (ns == NULL) | |
5807 | return NULL; | |
5808 | ||
5809 | lst = init_lock_stateid(openlockstateid(ns), lo, fi, inode, ost); | |
5810 | if (lst == openlockstateid(ns)) | |
5811 | *new = true; | |
5812 | else | |
356a95ec | 5813 | nfs4_put_stid(ns); |
beeca19c | 5814 | out: |
356a95ec JL |
5815 | return lst; |
5816 | } | |
c53530da | 5817 | |
fd39ca9a | 5818 | static int |
1da177e4 LT |
5819 | check_lock_length(u64 offset, u64 length) |
5820 | { | |
e7969315 KM |
5821 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
5822 | (length > ~offset))); | |
1da177e4 LT |
5823 | } |
5824 | ||
dcef0413 | 5825 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 | 5826 | { |
11b9164a | 5827 | struct nfs4_file *fp = lock_stp->st_stid.sc_file; |
0997b173 | 5828 | |
7214e860 JL |
5829 | lockdep_assert_held(&fp->fi_lock); |
5830 | ||
82c5ff1b | 5831 | if (test_access(access, lock_stp)) |
0997b173 | 5832 | return; |
12659651 | 5833 | __nfs4_file_get_access(fp, access); |
82c5ff1b | 5834 | set_access(access, lock_stp); |
0997b173 BF |
5835 | } |
5836 | ||
356a95ec JL |
5837 | static __be32 |
5838 | lookup_or_create_lock_state(struct nfsd4_compound_state *cstate, | |
5839 | struct nfs4_ol_stateid *ost, | |
5840 | struct nfsd4_lock *lock, | |
dd257933 | 5841 | struct nfs4_ol_stateid **plst, bool *new) |
64a284d0 | 5842 | { |
5db1c03f | 5843 | __be32 status; |
11b9164a | 5844 | struct nfs4_file *fi = ost->st_stid.sc_file; |
64a284d0 BF |
5845 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); |
5846 | struct nfs4_client *cl = oo->oo_owner.so_client; | |
2b0143b5 | 5847 | struct inode *inode = d_inode(cstate->current_fh.fh_dentry); |
64a284d0 | 5848 | struct nfs4_lockowner *lo; |
dd257933 | 5849 | struct nfs4_ol_stateid *lst; |
64a284d0 BF |
5850 | unsigned int strhashval; |
5851 | ||
c8623999 | 5852 | lo = find_lockowner_str(cl, &lock->lk_new_owner); |
c53530da | 5853 | if (!lo) { |
76f6c9e1 | 5854 | strhashval = ownerstr_hashval(&lock->lk_new_owner); |
c53530da JL |
5855 | lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); |
5856 | if (lo == NULL) | |
5857 | return nfserr_jukebox; | |
5858 | } else { | |
5859 | /* with an existing lockowner, seqids must be the same */ | |
5db1c03f | 5860 | status = nfserr_bad_seqid; |
c53530da JL |
5861 | if (!cstate->minorversion && |
5862 | lock->lk_new_lock_seqid != lo->lo_owner.so_seqid) | |
5db1c03f | 5863 | goto out; |
64a284d0 | 5864 | } |
c53530da | 5865 | |
dd257933 JL |
5866 | lst = find_or_create_lock_stateid(lo, fi, inode, ost, new); |
5867 | if (lst == NULL) { | |
5db1c03f JL |
5868 | status = nfserr_jukebox; |
5869 | goto out; | |
64a284d0 | 5870 | } |
dd257933 | 5871 | |
5db1c03f | 5872 | status = nfs_ok; |
dd257933 | 5873 | *plst = lst; |
5db1c03f JL |
5874 | out: |
5875 | nfs4_put_stateowner(&lo->lo_owner); | |
5876 | return status; | |
64a284d0 BF |
5877 | } |
5878 | ||
1da177e4 LT |
5879 | /* |
5880 | * LOCK operation | |
5881 | */ | |
b37ad28b | 5882 | __be32 |
ca364317 | 5883 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 5884 | union nfsd4_op_u *u) |
1da177e4 | 5885 | { |
eb69853d | 5886 | struct nfsd4_lock *lock = &u->lock; |
fe0750e5 BF |
5887 | struct nfs4_openowner *open_sop = NULL; |
5888 | struct nfs4_lockowner *lock_sop = NULL; | |
3d0fabd5 | 5889 | struct nfs4_ol_stateid *lock_stp = NULL; |
0667b1e9 | 5890 | struct nfs4_ol_stateid *open_stp = NULL; |
7214e860 | 5891 | struct nfs4_file *fp; |
7d947842 | 5892 | struct file *filp = NULL; |
76d348fa | 5893 | struct nfsd4_blocked_lock *nbl = NULL; |
21179d81 JL |
5894 | struct file_lock *file_lock = NULL; |
5895 | struct file_lock *conflock = NULL; | |
b37ad28b | 5896 | __be32 status = 0; |
b34f27aa | 5897 | int lkflg; |
b8dd7b9a | 5898 | int err; |
5db1c03f | 5899 | bool new = false; |
76d348fa JL |
5900 | unsigned char fl_type; |
5901 | unsigned int fl_flags = FL_POSIX; | |
3320fef1 SK |
5902 | struct net *net = SVC_NET(rqstp); |
5903 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 LT |
5904 | |
5905 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
5906 | (long long) lock->lk_offset, | |
5907 | (long long) lock->lk_length); | |
5908 | ||
1da177e4 LT |
5909 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
5910 | return nfserr_inval; | |
5911 | ||
ca364317 | 5912 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 5913 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
5914 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
5915 | return status; | |
5916 | } | |
5917 | ||
1da177e4 | 5918 | if (lock->lk_is_new) { |
684e5638 BF |
5919 | if (nfsd4_has_session(cstate)) |
5920 | /* See rfc 5661 18.10.3: given clientid is ignored: */ | |
76f6c9e1 | 5921 | memcpy(&lock->lk_new_clientid, |
684e5638 BF |
5922 | &cstate->session->se_client->cl_clientid, |
5923 | sizeof(clientid_t)); | |
5924 | ||
1da177e4 | 5925 | status = nfserr_stale_clientid; |
2c142baa | 5926 | if (STALE_CLIENTID(&lock->lk_new_clientid, nn)) |
1da177e4 | 5927 | goto out; |
1da177e4 | 5928 | |
1da177e4 | 5929 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 5930 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
5931 | lock->lk_new_open_seqid, |
5932 | &lock->lk_new_open_stateid, | |
3320fef1 | 5933 | &open_stp, nn); |
37515177 | 5934 | if (status) |
1da177e4 | 5935 | goto out; |
feb9dad5 | 5936 | mutex_unlock(&open_stp->st_mutex); |
fe0750e5 | 5937 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 5938 | status = nfserr_bad_stateid; |
684e5638 | 5939 | if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
76f6c9e1 | 5940 | &lock->lk_new_clientid)) |
b34f27aa | 5941 | goto out; |
64a284d0 | 5942 | status = lookup_or_create_lock_state(cstate, open_stp, lock, |
5db1c03f | 5943 | &lock_stp, &new); |
3d0fabd5 | 5944 | } else { |
dd453dfd | 5945 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
5946 | lock->lk_old_lock_seqid, |
5947 | &lock->lk_old_lock_stateid, | |
3320fef1 | 5948 | NFS4_LOCK_STID, &lock_stp, nn); |
3d0fabd5 | 5949 | } |
e1aaa891 BF |
5950 | if (status) |
5951 | goto out; | |
64a284d0 | 5952 | lock_sop = lockowner(lock_stp->st_stateowner); |
1da177e4 | 5953 | |
b34f27aa BF |
5954 | lkflg = setlkflg(lock->lk_type); |
5955 | status = nfs4_check_openmode(lock_stp, lkflg); | |
5956 | if (status) | |
5957 | goto out; | |
5958 | ||
0dd395dc | 5959 | status = nfserr_grace; |
3320fef1 | 5960 | if (locks_in_grace(net) && !lock->lk_reclaim) |
0dd395dc N |
5961 | goto out; |
5962 | status = nfserr_no_grace; | |
3320fef1 | 5963 | if (!locks_in_grace(net) && lock->lk_reclaim) |
0dd395dc N |
5964 | goto out; |
5965 | ||
11b9164a | 5966 | fp = lock_stp->st_stid.sc_file; |
1da177e4 | 5967 | switch (lock->lk_type) { |
1da177e4 | 5968 | case NFS4_READW_LT: |
76d348fa JL |
5969 | if (nfsd4_has_session(cstate)) |
5970 | fl_flags |= FL_SLEEP; | |
5971 | /* Fallthrough */ | |
5972 | case NFS4_READ_LT: | |
7214e860 JL |
5973 | spin_lock(&fp->fi_lock); |
5974 | filp = find_readable_file_locked(fp); | |
0997b173 BF |
5975 | if (filp) |
5976 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
7214e860 | 5977 | spin_unlock(&fp->fi_lock); |
76d348fa | 5978 | fl_type = F_RDLCK; |
529d7b2a | 5979 | break; |
1da177e4 | 5980 | case NFS4_WRITEW_LT: |
76d348fa JL |
5981 | if (nfsd4_has_session(cstate)) |
5982 | fl_flags |= FL_SLEEP; | |
5983 | /* Fallthrough */ | |
5984 | case NFS4_WRITE_LT: | |
7214e860 JL |
5985 | spin_lock(&fp->fi_lock); |
5986 | filp = find_writeable_file_locked(fp); | |
0997b173 BF |
5987 | if (filp) |
5988 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
7214e860 | 5989 | spin_unlock(&fp->fi_lock); |
76d348fa | 5990 | fl_type = F_WRLCK; |
529d7b2a | 5991 | break; |
1da177e4 LT |
5992 | default: |
5993 | status = nfserr_inval; | |
5994 | goto out; | |
5995 | } | |
76d348fa | 5996 | |
f9d7562f BF |
5997 | if (!filp) { |
5998 | status = nfserr_openmode; | |
5999 | goto out; | |
6000 | } | |
aef9583b | 6001 | |
76d348fa JL |
6002 | nbl = find_or_allocate_block(lock_sop, &fp->fi_fhandle, nn); |
6003 | if (!nbl) { | |
6004 | dprintk("NFSD: %s: unable to allocate block!\n", __func__); | |
6005 | status = nfserr_jukebox; | |
6006 | goto out; | |
6007 | } | |
6008 | ||
6009 | file_lock = &nbl->nbl_lock; | |
6010 | file_lock->fl_type = fl_type; | |
aef9583b | 6011 | file_lock->fl_owner = (fl_owner_t)lockowner(nfs4_get_stateowner(&lock_sop->lo_owner)); |
21179d81 JL |
6012 | file_lock->fl_pid = current->tgid; |
6013 | file_lock->fl_file = filp; | |
76d348fa | 6014 | file_lock->fl_flags = fl_flags; |
21179d81 JL |
6015 | file_lock->fl_lmops = &nfsd_posix_mng_ops; |
6016 | file_lock->fl_start = lock->lk_offset; | |
6017 | file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); | |
6018 | nfs4_transform_lock_offset(file_lock); | |
6019 | ||
6020 | conflock = locks_alloc_lock(); | |
6021 | if (!conflock) { | |
6022 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
6023 | status = nfserr_jukebox; | |
6024 | goto out; | |
6025 | } | |
1da177e4 | 6026 | |
76d348fa | 6027 | if (fl_flags & FL_SLEEP) { |
7919d0a2 | 6028 | nbl->nbl_time = jiffies; |
0cc11a61 | 6029 | spin_lock(&nn->blocked_locks_lock); |
76d348fa | 6030 | list_add_tail(&nbl->nbl_list, &lock_sop->lo_blocked); |
7919d0a2 | 6031 | list_add_tail(&nbl->nbl_lru, &nn->blocked_locks_lru); |
0cc11a61 | 6032 | spin_unlock(&nn->blocked_locks_lock); |
76d348fa JL |
6033 | } |
6034 | ||
21179d81 | 6035 | err = vfs_lock_file(filp, F_SETLK, file_lock, conflock); |
76d348fa | 6036 | switch (err) { |
1da177e4 | 6037 | case 0: /* success! */ |
9767feb2 | 6038 | nfs4_inc_and_copy_stateid(&lock->lk_resp_stateid, &lock_stp->st_stid); |
b8dd7b9a | 6039 | status = 0; |
eb76b3fd | 6040 | break; |
76d348fa JL |
6041 | case FILE_LOCK_DEFERRED: |
6042 | nbl = NULL; | |
6043 | /* Fallthrough */ | |
6044 | case -EAGAIN: /* conflock holds conflicting lock */ | |
eb76b3fd AA |
6045 | status = nfserr_denied; |
6046 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
21179d81 | 6047 | nfs4_set_lock_denied(conflock, &lock->lk_denied); |
eb76b3fd | 6048 | break; |
76d348fa | 6049 | case -EDEADLK: |
1da177e4 | 6050 | status = nfserr_deadlock; |
eb76b3fd | 6051 | break; |
3e772463 | 6052 | default: |
fd85b817 | 6053 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 6054 | status = nfserrno(err); |
eb76b3fd | 6055 | break; |
1da177e4 | 6056 | } |
1da177e4 | 6057 | out: |
76d348fa JL |
6058 | if (nbl) { |
6059 | /* dequeue it if we queued it before */ | |
6060 | if (fl_flags & FL_SLEEP) { | |
0cc11a61 | 6061 | spin_lock(&nn->blocked_locks_lock); |
76d348fa | 6062 | list_del_init(&nbl->nbl_list); |
7919d0a2 | 6063 | list_del_init(&nbl->nbl_lru); |
0cc11a61 | 6064 | spin_unlock(&nn->blocked_locks_lock); |
76d348fa JL |
6065 | } |
6066 | free_blocked_lock(nbl); | |
6067 | } | |
de18643d TM |
6068 | if (filp) |
6069 | fput(filp); | |
5db1c03f JL |
6070 | if (lock_stp) { |
6071 | /* Bump seqid manually if the 4.0 replay owner is openowner */ | |
6072 | if (cstate->replay_owner && | |
6073 | cstate->replay_owner != &lock_sop->lo_owner && | |
6074 | seqid_mutating_err(ntohl(status))) | |
6075 | lock_sop->lo_owner.so_seqid++; | |
6076 | ||
6077 | /* | |
6078 | * If this is a new, never-before-used stateid, and we are | |
6079 | * returning an error, then just go ahead and release it. | |
6080 | */ | |
beeca19c TM |
6081 | if (status && new) { |
6082 | lock_stp->st_stid.sc_type = NFS4_CLOSED_STID; | |
5db1c03f | 6083 | release_lock_stateid(lock_stp); |
beeca19c TM |
6084 | } |
6085 | ||
6086 | mutex_unlock(&lock_stp->st_mutex); | |
5db1c03f | 6087 | |
3d0fabd5 | 6088 | nfs4_put_stid(&lock_stp->st_stid); |
5db1c03f | 6089 | } |
0667b1e9 TM |
6090 | if (open_stp) |
6091 | nfs4_put_stid(&open_stp->st_stid); | |
9411b1d4 | 6092 | nfsd4_bump_seqid(cstate, status); |
21179d81 JL |
6093 | if (conflock) |
6094 | locks_free_lock(conflock); | |
1da177e4 LT |
6095 | return status; |
6096 | } | |
6097 | ||
55ef1274 BF |
6098 | /* |
6099 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
6100 | * so we do a temporary open here just to get an open file to pass to | |
6101 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
6102 | * inode operation.) | |
6103 | */ | |
04da6e9d | 6104 | static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) |
55ef1274 BF |
6105 | { |
6106 | struct file *file; | |
04da6e9d AV |
6107 | __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); |
6108 | if (!err) { | |
6109 | err = nfserrno(vfs_test_lock(file, lock)); | |
fd891454 | 6110 | fput(file); |
04da6e9d | 6111 | } |
55ef1274 BF |
6112 | return err; |
6113 | } | |
6114 | ||
1da177e4 LT |
6115 | /* |
6116 | * LOCKT operation | |
6117 | */ | |
b37ad28b | 6118 | __be32 |
ca364317 | 6119 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 6120 | union nfsd4_op_u *u) |
1da177e4 | 6121 | { |
eb69853d | 6122 | struct nfsd4_lockt *lockt = &u->lockt; |
21179d81 | 6123 | struct file_lock *file_lock = NULL; |
5db1c03f | 6124 | struct nfs4_lockowner *lo = NULL; |
b37ad28b | 6125 | __be32 status; |
7f2210fa | 6126 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 6127 | |
5ccb0066 | 6128 | if (locks_in_grace(SVC_NET(rqstp))) |
1da177e4 LT |
6129 | return nfserr_grace; |
6130 | ||
6131 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
6132 | return nfserr_inval; | |
6133 | ||
9b2ef62b | 6134 | if (!nfsd4_has_session(cstate)) { |
4b24ca7d | 6135 | status = lookup_clientid(&lockt->lt_clientid, cstate, nn); |
9b2ef62b BF |
6136 | if (status) |
6137 | goto out; | |
6138 | } | |
1da177e4 | 6139 | |
75c096f7 | 6140 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 6141 | goto out; |
1da177e4 | 6142 | |
21179d81 JL |
6143 | file_lock = locks_alloc_lock(); |
6144 | if (!file_lock) { | |
6145 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
6146 | status = nfserr_jukebox; | |
6147 | goto out; | |
6148 | } | |
6cd90662 | 6149 | |
1da177e4 LT |
6150 | switch (lockt->lt_type) { |
6151 | case NFS4_READ_LT: | |
6152 | case NFS4_READW_LT: | |
21179d81 | 6153 | file_lock->fl_type = F_RDLCK; |
1da177e4 LT |
6154 | break; |
6155 | case NFS4_WRITE_LT: | |
6156 | case NFS4_WRITEW_LT: | |
21179d81 | 6157 | file_lock->fl_type = F_WRLCK; |
1da177e4 LT |
6158 | break; |
6159 | default: | |
2fdada03 | 6160 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
6161 | status = nfserr_inval; |
6162 | goto out; | |
6163 | } | |
6164 | ||
c8623999 | 6165 | lo = find_lockowner_str(cstate->clp, &lockt->lt_owner); |
fe0750e5 | 6166 | if (lo) |
21179d81 JL |
6167 | file_lock->fl_owner = (fl_owner_t)lo; |
6168 | file_lock->fl_pid = current->tgid; | |
6169 | file_lock->fl_flags = FL_POSIX; | |
1da177e4 | 6170 | |
21179d81 JL |
6171 | file_lock->fl_start = lockt->lt_offset; |
6172 | file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); | |
1da177e4 | 6173 | |
21179d81 | 6174 | nfs4_transform_lock_offset(file_lock); |
1da177e4 | 6175 | |
21179d81 | 6176 | status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock); |
04da6e9d | 6177 | if (status) |
fd85b817 | 6178 | goto out; |
04da6e9d | 6179 | |
21179d81 | 6180 | if (file_lock->fl_type != F_UNLCK) { |
1da177e4 | 6181 | status = nfserr_denied; |
21179d81 | 6182 | nfs4_set_lock_denied(file_lock, &lockt->lt_denied); |
1da177e4 LT |
6183 | } |
6184 | out: | |
5db1c03f JL |
6185 | if (lo) |
6186 | nfs4_put_stateowner(&lo->lo_owner); | |
21179d81 JL |
6187 | if (file_lock) |
6188 | locks_free_lock(file_lock); | |
1da177e4 LT |
6189 | return status; |
6190 | } | |
6191 | ||
b37ad28b | 6192 | __be32 |
ca364317 | 6193 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 6194 | union nfsd4_op_u *u) |
1da177e4 | 6195 | { |
eb69853d | 6196 | struct nfsd4_locku *locku = &u->locku; |
dcef0413 | 6197 | struct nfs4_ol_stateid *stp; |
1da177e4 | 6198 | struct file *filp = NULL; |
21179d81 | 6199 | struct file_lock *file_lock = NULL; |
b37ad28b | 6200 | __be32 status; |
b8dd7b9a | 6201 | int err; |
3320fef1 SK |
6202 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
6203 | ||
1da177e4 LT |
6204 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", |
6205 | (long long) locku->lu_offset, | |
6206 | (long long) locku->lu_length); | |
6207 | ||
6208 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
6209 | return nfserr_inval; | |
6210 | ||
9072d5c6 | 6211 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
3320fef1 SK |
6212 | &locku->lu_stateid, NFS4_LOCK_STID, |
6213 | &stp, nn); | |
9072d5c6 | 6214 | if (status) |
1da177e4 | 6215 | goto out; |
11b9164a | 6216 | filp = find_any_file(stp->st_stid.sc_file); |
f9d7562f BF |
6217 | if (!filp) { |
6218 | status = nfserr_lock_range; | |
858cc573 | 6219 | goto put_stateid; |
f9d7562f | 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; | |
de18643d | 6225 | goto fput; |
21179d81 | 6226 | } |
6cd90662 | 6227 | |
21179d81 | 6228 | file_lock->fl_type = F_UNLCK; |
aef9583b | 6229 | file_lock->fl_owner = (fl_owner_t)lockowner(nfs4_get_stateowner(stp->st_stateowner)); |
21179d81 JL |
6230 | file_lock->fl_pid = current->tgid; |
6231 | file_lock->fl_file = filp; | |
6232 | file_lock->fl_flags = FL_POSIX; | |
6233 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
6234 | file_lock->fl_start = locku->lu_offset; | |
6235 | ||
6236 | file_lock->fl_end = last_byte_offset(locku->lu_offset, | |
6237 | locku->lu_length); | |
6238 | nfs4_transform_lock_offset(file_lock); | |
1da177e4 | 6239 | |
21179d81 | 6240 | err = vfs_lock_file(filp, F_SETLK, file_lock, NULL); |
b8dd7b9a | 6241 | if (err) { |
fd85b817 | 6242 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
6243 | goto out_nfserr; |
6244 | } | |
9767feb2 | 6245 | nfs4_inc_and_copy_stateid(&locku->lu_stateid, &stp->st_stid); |
de18643d TM |
6246 | fput: |
6247 | fput(filp); | |
858cc573 | 6248 | put_stateid: |
feb9dad5 | 6249 | mutex_unlock(&stp->st_mutex); |
858cc573 | 6250 | nfs4_put_stid(&stp->st_stid); |
1da177e4 | 6251 | out: |
9411b1d4 | 6252 | nfsd4_bump_seqid(cstate, status); |
21179d81 JL |
6253 | if (file_lock) |
6254 | locks_free_lock(file_lock); | |
1da177e4 LT |
6255 | return status; |
6256 | ||
6257 | out_nfserr: | |
b8dd7b9a | 6258 | status = nfserrno(err); |
de18643d | 6259 | goto fput; |
1da177e4 LT |
6260 | } |
6261 | ||
6262 | /* | |
6263 | * returns | |
f9c00c3a JL |
6264 | * true: locks held by lockowner |
6265 | * false: no locks held by lockowner | |
1da177e4 | 6266 | */ |
f9c00c3a JL |
6267 | static bool |
6268 | check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner) | |
1da177e4 | 6269 | { |
bd61e0a9 | 6270 | struct file_lock *fl; |
f9c00c3a JL |
6271 | int status = false; |
6272 | struct file *filp = find_any_file(fp); | |
6273 | struct inode *inode; | |
bd61e0a9 | 6274 | struct file_lock_context *flctx; |
f9c00c3a JL |
6275 | |
6276 | if (!filp) { | |
6277 | /* Any valid lock stateid should have some sort of access */ | |
6278 | WARN_ON_ONCE(1); | |
6279 | return status; | |
6280 | } | |
6281 | ||
6282 | inode = file_inode(filp); | |
bd61e0a9 JL |
6283 | flctx = inode->i_flctx; |
6284 | ||
6285 | if (flctx && !list_empty_careful(&flctx->flc_posix)) { | |
6109c850 | 6286 | spin_lock(&flctx->flc_lock); |
bd61e0a9 JL |
6287 | list_for_each_entry(fl, &flctx->flc_posix, fl_list) { |
6288 | if (fl->fl_owner == (fl_owner_t)lowner) { | |
6289 | status = true; | |
6290 | break; | |
6291 | } | |
796dadfd | 6292 | } |
6109c850 | 6293 | spin_unlock(&flctx->flc_lock); |
1da177e4 | 6294 | } |
f9c00c3a | 6295 | fput(filp); |
1da177e4 LT |
6296 | return status; |
6297 | } | |
6298 | ||
b37ad28b | 6299 | __be32 |
b591480b BF |
6300 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
6301 | struct nfsd4_compound_state *cstate, | |
eb69853d | 6302 | union nfsd4_op_u *u) |
1da177e4 | 6303 | { |
eb69853d | 6304 | struct nfsd4_release_lockowner *rlockowner = &u->release_lockowner; |
1da177e4 | 6305 | clientid_t *clid = &rlockowner->rl_clientid; |
882e9d25 JL |
6306 | struct nfs4_stateowner *sop; |
6307 | struct nfs4_lockowner *lo = NULL; | |
dcef0413 | 6308 | struct nfs4_ol_stateid *stp; |
1da177e4 | 6309 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
d4f0489f | 6310 | unsigned int hashval = ownerstr_hashval(owner); |
b37ad28b | 6311 | __be32 status; |
7f2210fa | 6312 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
c58c6610 | 6313 | struct nfs4_client *clp; |
88584818 | 6314 | LIST_HEAD (reaplist); |
1da177e4 LT |
6315 | |
6316 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
6317 | clid->cl_boot, clid->cl_id); | |
6318 | ||
4b24ca7d | 6319 | status = lookup_clientid(clid, cstate, nn); |
9b2ef62b | 6320 | if (status) |
51f5e783 | 6321 | return status; |
9b2ef62b | 6322 | |
d4f0489f | 6323 | clp = cstate->clp; |
fd44907c | 6324 | /* Find the matching lock stateowner */ |
d4f0489f | 6325 | spin_lock(&clp->cl_lock); |
882e9d25 | 6326 | list_for_each_entry(sop, &clp->cl_ownerstr_hashtbl[hashval], |
d4f0489f | 6327 | so_strhash) { |
fd44907c | 6328 | |
882e9d25 JL |
6329 | if (sop->so_is_open_owner || !same_owner_str(sop, owner)) |
6330 | continue; | |
fd44907c | 6331 | |
882e9d25 JL |
6332 | /* see if there are still any locks associated with it */ |
6333 | lo = lockowner(sop); | |
6334 | list_for_each_entry(stp, &sop->so_stateids, st_perstateowner) { | |
6335 | if (check_for_locks(stp->st_stid.sc_file, lo)) { | |
6336 | status = nfserr_locks_held; | |
6337 | spin_unlock(&clp->cl_lock); | |
51f5e783 | 6338 | return status; |
882e9d25 | 6339 | } |
5adfd885 | 6340 | } |
882e9d25 | 6341 | |
b5971afa | 6342 | nfs4_get_stateowner(sop); |
882e9d25 | 6343 | break; |
1da177e4 | 6344 | } |
88584818 CL |
6345 | if (!lo) { |
6346 | spin_unlock(&clp->cl_lock); | |
6347 | return status; | |
6348 | } | |
6349 | ||
6350 | unhash_lockowner_locked(lo); | |
6351 | while (!list_empty(&lo->lo_owner.so_stateids)) { | |
6352 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
6353 | struct nfs4_ol_stateid, | |
6354 | st_perstateowner); | |
6355 | WARN_ON(!unhash_lock_stateid(stp)); | |
6356 | put_ol_stateid_locked(stp, &reaplist); | |
6357 | } | |
c58c6610 | 6358 | spin_unlock(&clp->cl_lock); |
88584818 CL |
6359 | free_ol_stateid_reaplist(&reaplist); |
6360 | nfs4_put_stateowner(&lo->lo_owner); | |
6361 | ||
1da177e4 LT |
6362 | return status; |
6363 | } | |
6364 | ||
6365 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 6366 | alloc_reclaim(void) |
1da177e4 | 6367 | { |
a55370a3 | 6368 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
6369 | } |
6370 | ||
0ce0c2b5 | 6371 | bool |
52e19c09 | 6372 | nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn) |
c7b9a459 | 6373 | { |
0ce0c2b5 | 6374 | struct nfs4_client_reclaim *crp; |
c7b9a459 | 6375 | |
52e19c09 | 6376 | crp = nfsd4_find_reclaim_client(name, nn); |
0ce0c2b5 | 6377 | return (crp && crp->cr_clp); |
c7b9a459 N |
6378 | } |
6379 | ||
1da177e4 LT |
6380 | /* |
6381 | * failure => all reset bets are off, nfserr_no_grace... | |
6382 | */ | |
772a9bbb | 6383 | struct nfs4_client_reclaim * |
52e19c09 | 6384 | nfs4_client_to_reclaim(const char *name, struct nfsd_net *nn) |
1da177e4 LT |
6385 | { |
6386 | unsigned int strhashval; | |
772a9bbb | 6387 | struct nfs4_client_reclaim *crp; |
1da177e4 | 6388 | |
a55370a3 N |
6389 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
6390 | crp = alloc_reclaim(); | |
772a9bbb JL |
6391 | if (crp) { |
6392 | strhashval = clientstr_hashval(name); | |
6393 | INIT_LIST_HEAD(&crp->cr_strhash); | |
52e19c09 | 6394 | list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]); |
772a9bbb | 6395 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
0ce0c2b5 | 6396 | crp->cr_clp = NULL; |
52e19c09 | 6397 | nn->reclaim_str_hashtbl_size++; |
772a9bbb JL |
6398 | } |
6399 | return crp; | |
1da177e4 LT |
6400 | } |
6401 | ||
ce30e539 | 6402 | void |
52e19c09 | 6403 | nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn) |
ce30e539 JL |
6404 | { |
6405 | list_del(&crp->cr_strhash); | |
6406 | kfree(crp); | |
52e19c09 | 6407 | nn->reclaim_str_hashtbl_size--; |
ce30e539 JL |
6408 | } |
6409 | ||
2a4317c5 | 6410 | void |
52e19c09 | 6411 | nfs4_release_reclaim(struct nfsd_net *nn) |
1da177e4 LT |
6412 | { |
6413 | struct nfs4_client_reclaim *crp = NULL; | |
6414 | int i; | |
6415 | ||
1da177e4 | 6416 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
52e19c09 SK |
6417 | while (!list_empty(&nn->reclaim_str_hashtbl[i])) { |
6418 | crp = list_entry(nn->reclaim_str_hashtbl[i].next, | |
1da177e4 | 6419 | struct nfs4_client_reclaim, cr_strhash); |
52e19c09 | 6420 | nfs4_remove_reclaim_record(crp, nn); |
1da177e4 LT |
6421 | } |
6422 | } | |
063b0fb9 | 6423 | WARN_ON_ONCE(nn->reclaim_str_hashtbl_size); |
1da177e4 LT |
6424 | } |
6425 | ||
6426 | /* | |
6427 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
2a4317c5 | 6428 | struct nfs4_client_reclaim * |
52e19c09 | 6429 | nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn) |
1da177e4 LT |
6430 | { |
6431 | unsigned int strhashval; | |
1da177e4 LT |
6432 | struct nfs4_client_reclaim *crp = NULL; |
6433 | ||
278c931c | 6434 | dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir); |
1da177e4 | 6435 | |
278c931c | 6436 | strhashval = clientstr_hashval(recdir); |
52e19c09 | 6437 | list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) { |
278c931c | 6438 | if (same_name(crp->cr_recdir, recdir)) { |
1da177e4 LT |
6439 | return crp; |
6440 | } | |
6441 | } | |
6442 | return NULL; | |
6443 | } | |
6444 | ||
6445 | /* | |
6446 | * Called from OPEN. Look for clientid in reclaim list. | |
6447 | */ | |
b37ad28b | 6448 | __be32 |
0fe492db TM |
6449 | nfs4_check_open_reclaim(clientid_t *clid, |
6450 | struct nfsd4_compound_state *cstate, | |
6451 | struct nfsd_net *nn) | |
1da177e4 | 6452 | { |
0fe492db | 6453 | __be32 status; |
a52d726b JL |
6454 | |
6455 | /* find clientid in conf_id_hashtbl */ | |
0fe492db TM |
6456 | status = lookup_clientid(clid, cstate, nn); |
6457 | if (status) | |
a52d726b JL |
6458 | return nfserr_reclaim_bad; |
6459 | ||
3b3e7b72 JL |
6460 | if (test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, &cstate->clp->cl_flags)) |
6461 | return nfserr_no_grace; | |
6462 | ||
0fe492db TM |
6463 | if (nfsd4_client_record_check(cstate->clp)) |
6464 | return nfserr_reclaim_bad; | |
6465 | ||
6466 | return nfs_ok; | |
1da177e4 LT |
6467 | } |
6468 | ||
65178db4 | 6469 | #ifdef CONFIG_NFSD_FAULT_INJECTION |
016200c3 JL |
6470 | static inline void |
6471 | put_client(struct nfs4_client *clp) | |
6472 | { | |
6473 | atomic_dec(&clp->cl_refcount); | |
6474 | } | |
6475 | ||
285abdee JL |
6476 | static struct nfs4_client * |
6477 | nfsd_find_client(struct sockaddr_storage *addr, size_t addr_size) | |
6478 | { | |
6479 | struct nfs4_client *clp; | |
6480 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6481 | nfsd_net_id); | |
6482 | ||
6483 | if (!nfsd_netns_ready(nn)) | |
6484 | return NULL; | |
6485 | ||
6486 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
6487 | if (memcmp(&clp->cl_addr, addr, addr_size) == 0) | |
6488 | return clp; | |
6489 | } | |
6490 | return NULL; | |
6491 | } | |
6492 | ||
7ec0e36f | 6493 | u64 |
285abdee | 6494 | nfsd_inject_print_clients(void) |
7ec0e36f JL |
6495 | { |
6496 | struct nfs4_client *clp; | |
6497 | u64 count = 0; | |
6498 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6499 | nfsd_net_id); | |
6500 | char buf[INET6_ADDRSTRLEN]; | |
6501 | ||
6502 | if (!nfsd_netns_ready(nn)) | |
6503 | return 0; | |
6504 | ||
6505 | spin_lock(&nn->client_lock); | |
6506 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
6507 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); | |
6508 | pr_info("NFS Client: %s\n", buf); | |
6509 | ++count; | |
6510 | } | |
6511 | spin_unlock(&nn->client_lock); | |
6512 | ||
6513 | return count; | |
6514 | } | |
65178db4 | 6515 | |
a0926d15 | 6516 | u64 |
285abdee | 6517 | nfsd_inject_forget_client(struct sockaddr_storage *addr, size_t addr_size) |
a0926d15 JL |
6518 | { |
6519 | u64 count = 0; | |
6520 | struct nfs4_client *clp; | |
6521 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6522 | nfsd_net_id); | |
6523 | ||
6524 | if (!nfsd_netns_ready(nn)) | |
6525 | return count; | |
6526 | ||
6527 | spin_lock(&nn->client_lock); | |
6528 | clp = nfsd_find_client(addr, addr_size); | |
6529 | if (clp) { | |
6530 | if (mark_client_expired_locked(clp) == nfs_ok) | |
6531 | ++count; | |
6532 | else | |
6533 | clp = NULL; | |
6534 | } | |
6535 | spin_unlock(&nn->client_lock); | |
6536 | ||
6537 | if (clp) | |
6538 | expire_client(clp); | |
6539 | ||
6540 | return count; | |
6541 | } | |
6542 | ||
69fc9edf | 6543 | u64 |
285abdee | 6544 | nfsd_inject_forget_clients(u64 max) |
69fc9edf JL |
6545 | { |
6546 | u64 count = 0; | |
6547 | struct nfs4_client *clp, *next; | |
6548 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6549 | nfsd_net_id); | |
6550 | LIST_HEAD(reaplist); | |
6551 | ||
6552 | if (!nfsd_netns_ready(nn)) | |
6553 | return count; | |
6554 | ||
6555 | spin_lock(&nn->client_lock); | |
6556 | list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { | |
6557 | if (mark_client_expired_locked(clp) == nfs_ok) { | |
6558 | list_add(&clp->cl_lru, &reaplist); | |
6559 | if (max != 0 && ++count >= max) | |
6560 | break; | |
6561 | } | |
6562 | } | |
6563 | spin_unlock(&nn->client_lock); | |
6564 | ||
6565 | list_for_each_entry_safe(clp, next, &reaplist, cl_lru) | |
6566 | expire_client(clp); | |
6567 | ||
6568 | return count; | |
6569 | } | |
6570 | ||
184c1847 BS |
6571 | static void nfsd_print_count(struct nfs4_client *clp, unsigned int count, |
6572 | const char *type) | |
6573 | { | |
6574 | char buf[INET6_ADDRSTRLEN]; | |
0a5c33e2 | 6575 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
184c1847 BS |
6576 | printk(KERN_INFO "NFS Client: %s has %u %s\n", buf, count, type); |
6577 | } | |
6578 | ||
016200c3 JL |
6579 | static void |
6580 | nfsd_inject_add_lock_to_list(struct nfs4_ol_stateid *lst, | |
6581 | struct list_head *collect) | |
6582 | { | |
6583 | struct nfs4_client *clp = lst->st_stid.sc_client; | |
6584 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6585 | nfsd_net_id); | |
6586 | ||
6587 | if (!collect) | |
6588 | return; | |
6589 | ||
6590 | lockdep_assert_held(&nn->client_lock); | |
6591 | atomic_inc(&clp->cl_refcount); | |
6592 | list_add(&lst->st_locks, collect); | |
6593 | } | |
6594 | ||
3c87b9b7 | 6595 | static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max, |
3738d50e | 6596 | struct list_head *collect, |
e8568739 | 6597 | bool (*func)(struct nfs4_ol_stateid *)) |
fc29171f BS |
6598 | { |
6599 | struct nfs4_openowner *oop; | |
fc29171f | 6600 | struct nfs4_ol_stateid *stp, *st_next; |
3c87b9b7 | 6601 | struct nfs4_ol_stateid *lst, *lst_next; |
fc29171f BS |
6602 | u64 count = 0; |
6603 | ||
016200c3 | 6604 | spin_lock(&clp->cl_lock); |
fc29171f | 6605 | list_for_each_entry(oop, &clp->cl_openowners, oo_perclient) { |
3c87b9b7 TM |
6606 | list_for_each_entry_safe(stp, st_next, |
6607 | &oop->oo_owner.so_stateids, st_perstateowner) { | |
6608 | list_for_each_entry_safe(lst, lst_next, | |
6609 | &stp->st_locks, st_locks) { | |
3738d50e | 6610 | if (func) { |
e8568739 JL |
6611 | if (func(lst)) |
6612 | nfsd_inject_add_lock_to_list(lst, | |
6613 | collect); | |
3738d50e | 6614 | } |
016200c3 JL |
6615 | ++count; |
6616 | /* | |
6617 | * Despite the fact that these functions deal | |
6618 | * with 64-bit integers for "count", we must | |
6619 | * ensure that it doesn't blow up the | |
6620 | * clp->cl_refcount. Throw a warning if we | |
6621 | * start to approach INT_MAX here. | |
6622 | */ | |
6623 | WARN_ON_ONCE(count == (INT_MAX / 2)); | |
6624 | if (count == max) | |
6625 | goto out; | |
fc29171f BS |
6626 | } |
6627 | } | |
6628 | } | |
016200c3 JL |
6629 | out: |
6630 | spin_unlock(&clp->cl_lock); | |
fc29171f BS |
6631 | |
6632 | return count; | |
6633 | } | |
6634 | ||
016200c3 JL |
6635 | static u64 |
6636 | nfsd_collect_client_locks(struct nfs4_client *clp, struct list_head *collect, | |
6637 | u64 max) | |
fc29171f | 6638 | { |
016200c3 | 6639 | return nfsd_foreach_client_lock(clp, max, collect, unhash_lock_stateid); |
fc29171f BS |
6640 | } |
6641 | ||
016200c3 JL |
6642 | static u64 |
6643 | nfsd_print_client_locks(struct nfs4_client *clp) | |
184c1847 | 6644 | { |
016200c3 | 6645 | u64 count = nfsd_foreach_client_lock(clp, 0, NULL, NULL); |
184c1847 BS |
6646 | nfsd_print_count(clp, count, "locked files"); |
6647 | return count; | |
6648 | } | |
6649 | ||
016200c3 | 6650 | u64 |
285abdee | 6651 | nfsd_inject_print_locks(void) |
016200c3 JL |
6652 | { |
6653 | struct nfs4_client *clp; | |
6654 | u64 count = 0; | |
6655 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6656 | nfsd_net_id); | |
6657 | ||
6658 | if (!nfsd_netns_ready(nn)) | |
6659 | return 0; | |
6660 | ||
6661 | spin_lock(&nn->client_lock); | |
6662 | list_for_each_entry(clp, &nn->client_lru, cl_lru) | |
6663 | count += nfsd_print_client_locks(clp); | |
6664 | spin_unlock(&nn->client_lock); | |
6665 | ||
6666 | return count; | |
6667 | } | |
6668 | ||
6669 | static void | |
6670 | nfsd_reap_locks(struct list_head *reaplist) | |
6671 | { | |
6672 | struct nfs4_client *clp; | |
6673 | struct nfs4_ol_stateid *stp, *next; | |
6674 | ||
6675 | list_for_each_entry_safe(stp, next, reaplist, st_locks) { | |
6676 | list_del_init(&stp->st_locks); | |
6677 | clp = stp->st_stid.sc_client; | |
6678 | nfs4_put_stid(&stp->st_stid); | |
6679 | put_client(clp); | |
6680 | } | |
6681 | } | |
6682 | ||
6683 | u64 | |
285abdee | 6684 | nfsd_inject_forget_client_locks(struct sockaddr_storage *addr, size_t addr_size) |
016200c3 JL |
6685 | { |
6686 | unsigned int count = 0; | |
6687 | struct nfs4_client *clp; | |
6688 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6689 | nfsd_net_id); | |
6690 | LIST_HEAD(reaplist); | |
6691 | ||
6692 | if (!nfsd_netns_ready(nn)) | |
6693 | return count; | |
6694 | ||
6695 | spin_lock(&nn->client_lock); | |
6696 | clp = nfsd_find_client(addr, addr_size); | |
6697 | if (clp) | |
6698 | count = nfsd_collect_client_locks(clp, &reaplist, 0); | |
6699 | spin_unlock(&nn->client_lock); | |
6700 | nfsd_reap_locks(&reaplist); | |
6701 | return count; | |
6702 | } | |
6703 | ||
6704 | u64 | |
285abdee | 6705 | nfsd_inject_forget_locks(u64 max) |
016200c3 JL |
6706 | { |
6707 | u64 count = 0; | |
6708 | struct nfs4_client *clp; | |
6709 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6710 | nfsd_net_id); | |
6711 | LIST_HEAD(reaplist); | |
6712 | ||
6713 | if (!nfsd_netns_ready(nn)) | |
6714 | return count; | |
6715 | ||
6716 | spin_lock(&nn->client_lock); | |
6717 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
6718 | count += nfsd_collect_client_locks(clp, &reaplist, max - count); | |
6719 | if (max != 0 && count >= max) | |
6720 | break; | |
6721 | } | |
6722 | spin_unlock(&nn->client_lock); | |
6723 | nfsd_reap_locks(&reaplist); | |
6724 | return count; | |
6725 | } | |
6726 | ||
82e05efa JL |
6727 | static u64 |
6728 | nfsd_foreach_client_openowner(struct nfs4_client *clp, u64 max, | |
6729 | struct list_head *collect, | |
6730 | void (*func)(struct nfs4_openowner *)) | |
4dbdbda8 BS |
6731 | { |
6732 | struct nfs4_openowner *oop, *next; | |
82e05efa JL |
6733 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, |
6734 | nfsd_net_id); | |
4dbdbda8 BS |
6735 | u64 count = 0; |
6736 | ||
82e05efa JL |
6737 | lockdep_assert_held(&nn->client_lock); |
6738 | ||
6739 | spin_lock(&clp->cl_lock); | |
4dbdbda8 | 6740 | list_for_each_entry_safe(oop, next, &clp->cl_openowners, oo_perclient) { |
82e05efa | 6741 | if (func) { |
4dbdbda8 | 6742 | func(oop); |
82e05efa JL |
6743 | if (collect) { |
6744 | atomic_inc(&clp->cl_refcount); | |
6745 | list_add(&oop->oo_perclient, collect); | |
6746 | } | |
6747 | } | |
6748 | ++count; | |
6749 | /* | |
6750 | * Despite the fact that these functions deal with | |
6751 | * 64-bit integers for "count", we must ensure that | |
6752 | * it doesn't blow up the clp->cl_refcount. Throw a | |
6753 | * warning if we start to approach INT_MAX here. | |
6754 | */ | |
6755 | WARN_ON_ONCE(count == (INT_MAX / 2)); | |
6756 | if (count == max) | |
4dbdbda8 BS |
6757 | break; |
6758 | } | |
82e05efa JL |
6759 | spin_unlock(&clp->cl_lock); |
6760 | ||
6761 | return count; | |
6762 | } | |
6763 | ||
6764 | static u64 | |
6765 | nfsd_print_client_openowners(struct nfs4_client *clp) | |
6766 | { | |
6767 | u64 count = nfsd_foreach_client_openowner(clp, 0, NULL, NULL); | |
6768 | ||
6769 | nfsd_print_count(clp, count, "openowners"); | |
6770 | return count; | |
6771 | } | |
6772 | ||
6773 | static u64 | |
6774 | nfsd_collect_client_openowners(struct nfs4_client *clp, | |
6775 | struct list_head *collect, u64 max) | |
6776 | { | |
6777 | return nfsd_foreach_client_openowner(clp, max, collect, | |
6778 | unhash_openowner_locked); | |
6779 | } | |
6780 | ||
6781 | u64 | |
285abdee | 6782 | nfsd_inject_print_openowners(void) |
82e05efa JL |
6783 | { |
6784 | struct nfs4_client *clp; | |
6785 | u64 count = 0; | |
6786 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6787 | nfsd_net_id); | |
6788 | ||
6789 | if (!nfsd_netns_ready(nn)) | |
6790 | return 0; | |
6791 | ||
6792 | spin_lock(&nn->client_lock); | |
6793 | list_for_each_entry(clp, &nn->client_lru, cl_lru) | |
6794 | count += nfsd_print_client_openowners(clp); | |
6795 | spin_unlock(&nn->client_lock); | |
4dbdbda8 BS |
6796 | |
6797 | return count; | |
6798 | } | |
6799 | ||
82e05efa JL |
6800 | static void |
6801 | nfsd_reap_openowners(struct list_head *reaplist) | |
6802 | { | |
6803 | struct nfs4_client *clp; | |
6804 | struct nfs4_openowner *oop, *next; | |
6805 | ||
6806 | list_for_each_entry_safe(oop, next, reaplist, oo_perclient) { | |
6807 | list_del_init(&oop->oo_perclient); | |
6808 | clp = oop->oo_owner.so_client; | |
6809 | release_openowner(oop); | |
6810 | put_client(clp); | |
6811 | } | |
6812 | } | |
6813 | ||
6814 | u64 | |
285abdee JL |
6815 | nfsd_inject_forget_client_openowners(struct sockaddr_storage *addr, |
6816 | size_t addr_size) | |
4dbdbda8 | 6817 | { |
82e05efa JL |
6818 | unsigned int count = 0; |
6819 | struct nfs4_client *clp; | |
6820 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6821 | nfsd_net_id); | |
6822 | LIST_HEAD(reaplist); | |
6823 | ||
6824 | if (!nfsd_netns_ready(nn)) | |
6825 | return count; | |
6826 | ||
6827 | spin_lock(&nn->client_lock); | |
6828 | clp = nfsd_find_client(addr, addr_size); | |
6829 | if (clp) | |
6830 | count = nfsd_collect_client_openowners(clp, &reaplist, 0); | |
6831 | spin_unlock(&nn->client_lock); | |
6832 | nfsd_reap_openowners(&reaplist); | |
6833 | return count; | |
4dbdbda8 BS |
6834 | } |
6835 | ||
82e05efa | 6836 | u64 |
285abdee | 6837 | nfsd_inject_forget_openowners(u64 max) |
184c1847 | 6838 | { |
82e05efa JL |
6839 | u64 count = 0; |
6840 | struct nfs4_client *clp; | |
6841 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6842 | nfsd_net_id); | |
6843 | LIST_HEAD(reaplist); | |
6844 | ||
6845 | if (!nfsd_netns_ready(nn)) | |
6846 | return count; | |
6847 | ||
6848 | spin_lock(&nn->client_lock); | |
6849 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
6850 | count += nfsd_collect_client_openowners(clp, &reaplist, | |
6851 | max - count); | |
6852 | if (max != 0 && count >= max) | |
6853 | break; | |
6854 | } | |
6855 | spin_unlock(&nn->client_lock); | |
6856 | nfsd_reap_openowners(&reaplist); | |
184c1847 BS |
6857 | return count; |
6858 | } | |
6859 | ||
269de30f BS |
6860 | static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max, |
6861 | struct list_head *victims) | |
6862 | { | |
6863 | struct nfs4_delegation *dp, *next; | |
98d5c7c5 JL |
6864 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, |
6865 | nfsd_net_id); | |
269de30f BS |
6866 | u64 count = 0; |
6867 | ||
98d5c7c5 JL |
6868 | lockdep_assert_held(&nn->client_lock); |
6869 | ||
6870 | spin_lock(&state_lock); | |
269de30f | 6871 | list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) { |
dff1399f JL |
6872 | if (victims) { |
6873 | /* | |
6874 | * It's not safe to mess with delegations that have a | |
6875 | * non-zero dl_time. They might have already been broken | |
6876 | * and could be processed by the laundromat outside of | |
6877 | * the state_lock. Just leave them be. | |
6878 | */ | |
6879 | if (dp->dl_time != 0) | |
6880 | continue; | |
6881 | ||
98d5c7c5 | 6882 | atomic_inc(&clp->cl_refcount); |
3fcbbd24 | 6883 | WARN_ON(!unhash_delegation_locked(dp)); |
42690676 | 6884 | list_add(&dp->dl_recall_lru, victims); |
dff1399f | 6885 | } |
98d5c7c5 JL |
6886 | ++count; |
6887 | /* | |
6888 | * Despite the fact that these functions deal with | |
6889 | * 64-bit integers for "count", we must ensure that | |
6890 | * it doesn't blow up the clp->cl_refcount. Throw a | |
6891 | * warning if we start to approach INT_MAX here. | |
6892 | */ | |
6893 | WARN_ON_ONCE(count == (INT_MAX / 2)); | |
6894 | if (count == max) | |
269de30f BS |
6895 | break; |
6896 | } | |
98d5c7c5 | 6897 | spin_unlock(&state_lock); |
269de30f BS |
6898 | return count; |
6899 | } | |
6900 | ||
98d5c7c5 JL |
6901 | static u64 |
6902 | nfsd_print_client_delegations(struct nfs4_client *clp) | |
269de30f | 6903 | { |
98d5c7c5 | 6904 | u64 count = nfsd_find_all_delegations(clp, 0, NULL); |
269de30f | 6905 | |
98d5c7c5 JL |
6906 | nfsd_print_count(clp, count, "delegations"); |
6907 | return count; | |
6908 | } | |
6909 | ||
6910 | u64 | |
285abdee | 6911 | nfsd_inject_print_delegations(void) |
98d5c7c5 JL |
6912 | { |
6913 | struct nfs4_client *clp; | |
6914 | u64 count = 0; | |
6915 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6916 | nfsd_net_id); | |
6917 | ||
6918 | if (!nfsd_netns_ready(nn)) | |
6919 | return 0; | |
269de30f | 6920 | |
98d5c7c5 JL |
6921 | spin_lock(&nn->client_lock); |
6922 | list_for_each_entry(clp, &nn->client_lru, cl_lru) | |
6923 | count += nfsd_print_client_delegations(clp); | |
6924 | spin_unlock(&nn->client_lock); | |
6925 | ||
6926 | return count; | |
6927 | } | |
6928 | ||
6929 | static void | |
6930 | nfsd_forget_delegations(struct list_head *reaplist) | |
6931 | { | |
6932 | struct nfs4_client *clp; | |
6933 | struct nfs4_delegation *dp, *next; | |
6934 | ||
6935 | list_for_each_entry_safe(dp, next, reaplist, dl_recall_lru) { | |
2d4a532d | 6936 | list_del_init(&dp->dl_recall_lru); |
98d5c7c5 | 6937 | clp = dp->dl_stid.sc_client; |
3bd64a5b | 6938 | revoke_delegation(dp); |
98d5c7c5 | 6939 | put_client(clp); |
2d4a532d | 6940 | } |
98d5c7c5 JL |
6941 | } |
6942 | ||
6943 | u64 | |
285abdee JL |
6944 | nfsd_inject_forget_client_delegations(struct sockaddr_storage *addr, |
6945 | size_t addr_size) | |
98d5c7c5 JL |
6946 | { |
6947 | u64 count = 0; | |
6948 | struct nfs4_client *clp; | |
6949 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6950 | nfsd_net_id); | |
6951 | LIST_HEAD(reaplist); | |
6952 | ||
6953 | if (!nfsd_netns_ready(nn)) | |
6954 | return count; | |
6955 | ||
6956 | spin_lock(&nn->client_lock); | |
6957 | clp = nfsd_find_client(addr, addr_size); | |
6958 | if (clp) | |
6959 | count = nfsd_find_all_delegations(clp, 0, &reaplist); | |
6960 | spin_unlock(&nn->client_lock); | |
6961 | ||
6962 | nfsd_forget_delegations(&reaplist); | |
6963 | return count; | |
6964 | } | |
269de30f | 6965 | |
98d5c7c5 | 6966 | u64 |
285abdee | 6967 | nfsd_inject_forget_delegations(u64 max) |
98d5c7c5 JL |
6968 | { |
6969 | u64 count = 0; | |
6970 | struct nfs4_client *clp; | |
6971 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6972 | nfsd_net_id); | |
6973 | LIST_HEAD(reaplist); | |
6974 | ||
6975 | if (!nfsd_netns_ready(nn)) | |
6976 | return count; | |
6977 | ||
6978 | spin_lock(&nn->client_lock); | |
6979 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
6980 | count += nfsd_find_all_delegations(clp, max - count, &reaplist); | |
6981 | if (max != 0 && count >= max) | |
6982 | break; | |
6983 | } | |
6984 | spin_unlock(&nn->client_lock); | |
6985 | nfsd_forget_delegations(&reaplist); | |
269de30f BS |
6986 | return count; |
6987 | } | |
6988 | ||
98d5c7c5 JL |
6989 | static void |
6990 | nfsd_recall_delegations(struct list_head *reaplist) | |
269de30f | 6991 | { |
98d5c7c5 JL |
6992 | struct nfs4_client *clp; |
6993 | struct nfs4_delegation *dp, *next; | |
269de30f | 6994 | |
98d5c7c5 | 6995 | list_for_each_entry_safe(dp, next, reaplist, dl_recall_lru) { |
dff1399f | 6996 | list_del_init(&dp->dl_recall_lru); |
98d5c7c5 JL |
6997 | clp = dp->dl_stid.sc_client; |
6998 | /* | |
6999 | * We skipped all entries that had a zero dl_time before, | |
7000 | * so we can now reset the dl_time back to 0. If a delegation | |
7001 | * break comes in now, then it won't make any difference since | |
7002 | * we're recalling it either way. | |
7003 | */ | |
7004 | spin_lock(&state_lock); | |
dff1399f | 7005 | dp->dl_time = 0; |
98d5c7c5 | 7006 | spin_unlock(&state_lock); |
269de30f | 7007 | nfsd_break_one_deleg(dp); |
98d5c7c5 | 7008 | put_client(clp); |
dff1399f | 7009 | } |
98d5c7c5 | 7010 | } |
269de30f | 7011 | |
98d5c7c5 | 7012 | u64 |
285abdee | 7013 | nfsd_inject_recall_client_delegations(struct sockaddr_storage *addr, |
98d5c7c5 JL |
7014 | size_t addr_size) |
7015 | { | |
7016 | u64 count = 0; | |
7017 | struct nfs4_client *clp; | |
7018 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
7019 | nfsd_net_id); | |
7020 | LIST_HEAD(reaplist); | |
7021 | ||
7022 | if (!nfsd_netns_ready(nn)) | |
7023 | return count; | |
7024 | ||
7025 | spin_lock(&nn->client_lock); | |
7026 | clp = nfsd_find_client(addr, addr_size); | |
7027 | if (clp) | |
7028 | count = nfsd_find_all_delegations(clp, 0, &reaplist); | |
7029 | spin_unlock(&nn->client_lock); | |
7030 | ||
7031 | nfsd_recall_delegations(&reaplist); | |
269de30f BS |
7032 | return count; |
7033 | } | |
7034 | ||
98d5c7c5 | 7035 | u64 |
285abdee | 7036 | nfsd_inject_recall_delegations(u64 max) |
184c1847 BS |
7037 | { |
7038 | u64 count = 0; | |
98d5c7c5 JL |
7039 | struct nfs4_client *clp, *next; |
7040 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
7041 | nfsd_net_id); | |
7042 | LIST_HEAD(reaplist); | |
184c1847 | 7043 | |
98d5c7c5 JL |
7044 | if (!nfsd_netns_ready(nn)) |
7045 | return count; | |
184c1847 | 7046 | |
98d5c7c5 JL |
7047 | spin_lock(&nn->client_lock); |
7048 | list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { | |
7049 | count += nfsd_find_all_delegations(clp, max - count, &reaplist); | |
7050 | if (max != 0 && ++count >= max) | |
7051 | break; | |
7052 | } | |
7053 | spin_unlock(&nn->client_lock); | |
7054 | nfsd_recall_delegations(&reaplist); | |
184c1847 BS |
7055 | return count; |
7056 | } | |
65178db4 BS |
7057 | #endif /* CONFIG_NFSD_FAULT_INJECTION */ |
7058 | ||
c2f1a551 MS |
7059 | /* |
7060 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
7061 | * client may quite reasonably hang on to a delegation as long as it has | |
7062 | * the inode cached. This becomes an obvious problem the first time a | |
7063 | * client's inode cache approaches the size of the server's total memory. | |
7064 | * | |
7065 | * For now we avoid this problem by imposing a hard limit on the number | |
7066 | * of delegations, which varies according to the server's memory size. | |
7067 | */ | |
7068 | static void | |
7069 | set_max_delegations(void) | |
7070 | { | |
7071 | /* | |
7072 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
7073 | * estimates suggest that in the worst case (where every delegation | |
7074 | * is for a different inode), a delegation could take about 1.5K, | |
7075 | * giving a worst case usage of about 6% of memory. | |
7076 | */ | |
7077 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
7078 | } | |
7079 | ||
d85ed443 | 7080 | static int nfs4_state_create_net(struct net *net) |
8daae4dc SK |
7081 | { |
7082 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
7083 | int i; | |
7084 | ||
7085 | nn->conf_id_hashtbl = kmalloc(sizeof(struct list_head) * | |
7086 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
7087 | if (!nn->conf_id_hashtbl) | |
382a62e7 | 7088 | goto err; |
0a7ec377 SK |
7089 | nn->unconf_id_hashtbl = kmalloc(sizeof(struct list_head) * |
7090 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
7091 | if (!nn->unconf_id_hashtbl) | |
7092 | goto err_unconf_id; | |
1872de0e SK |
7093 | nn->sessionid_hashtbl = kmalloc(sizeof(struct list_head) * |
7094 | SESSION_HASH_SIZE, GFP_KERNEL); | |
7095 | if (!nn->sessionid_hashtbl) | |
7096 | goto err_sessionid; | |
8daae4dc | 7097 | |
382a62e7 | 7098 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
8daae4dc | 7099 | INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]); |
0a7ec377 | 7100 | INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]); |
382a62e7 | 7101 | } |
1872de0e SK |
7102 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
7103 | INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]); | |
382a62e7 | 7104 | nn->conf_name_tree = RB_ROOT; |
a99454aa | 7105 | nn->unconf_name_tree = RB_ROOT; |
81833de1 VA |
7106 | nn->boot_time = get_seconds(); |
7107 | nn->grace_ended = false; | |
7108 | nn->nfsd4_manager.block_opens = true; | |
7109 | INIT_LIST_HEAD(&nn->nfsd4_manager.list); | |
5ed58bb2 | 7110 | INIT_LIST_HEAD(&nn->client_lru); |
73758fed | 7111 | INIT_LIST_HEAD(&nn->close_lru); |
e8c69d17 | 7112 | INIT_LIST_HEAD(&nn->del_recall_lru); |
c9a49628 | 7113 | spin_lock_init(&nn->client_lock); |
8daae4dc | 7114 | |
0cc11a61 JL |
7115 | spin_lock_init(&nn->blocked_locks_lock); |
7116 | INIT_LIST_HEAD(&nn->blocked_locks_lru); | |
7117 | ||
09121281 | 7118 | INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main); |
d85ed443 | 7119 | get_net(net); |
09121281 | 7120 | |
8daae4dc | 7121 | return 0; |
382a62e7 | 7122 | |
1872de0e | 7123 | err_sessionid: |
9b531137 | 7124 | kfree(nn->unconf_id_hashtbl); |
0a7ec377 SK |
7125 | err_unconf_id: |
7126 | kfree(nn->conf_id_hashtbl); | |
382a62e7 SK |
7127 | err: |
7128 | return -ENOMEM; | |
8daae4dc SK |
7129 | } |
7130 | ||
7131 | static void | |
4dce0ac9 | 7132 | nfs4_state_destroy_net(struct net *net) |
8daae4dc SK |
7133 | { |
7134 | int i; | |
7135 | struct nfs4_client *clp = NULL; | |
7136 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
7137 | ||
7138 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { | |
7139 | while (!list_empty(&nn->conf_id_hashtbl[i])) { | |
7140 | clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
7141 | destroy_client(clp); | |
7142 | } | |
7143 | } | |
a99454aa | 7144 | |
2b905635 KM |
7145 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
7146 | while (!list_empty(&nn->unconf_id_hashtbl[i])) { | |
7147 | clp = list_entry(nn->unconf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
7148 | destroy_client(clp); | |
7149 | } | |
a99454aa SK |
7150 | } |
7151 | ||
1872de0e | 7152 | kfree(nn->sessionid_hashtbl); |
0a7ec377 | 7153 | kfree(nn->unconf_id_hashtbl); |
8daae4dc | 7154 | kfree(nn->conf_id_hashtbl); |
4dce0ac9 | 7155 | put_net(net); |
8daae4dc SK |
7156 | } |
7157 | ||
f252bc68 | 7158 | int |
d85ed443 | 7159 | nfs4_state_start_net(struct net *net) |
ac4d8ff2 | 7160 | { |
5e1533c7 | 7161 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b5a1a81e BF |
7162 | int ret; |
7163 | ||
d85ed443 | 7164 | ret = nfs4_state_create_net(net); |
8daae4dc SK |
7165 | if (ret) |
7166 | return ret; | |
d4318acd JL |
7167 | locks_start_grace(net, &nn->nfsd4_manager); |
7168 | nfsd4_client_tracking_init(net); | |
7e981a8a VA |
7169 | printk(KERN_INFO "NFSD: starting %ld-second grace period (net %x)\n", |
7170 | nn->nfsd4_grace, net->ns.inum); | |
5284b44e | 7171 | queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ); |
d85ed443 SK |
7172 | return 0; |
7173 | } | |
7174 | ||
7175 | /* initialization to perform when the nfsd service is started: */ | |
7176 | ||
7177 | int | |
7178 | nfs4_state_start(void) | |
7179 | { | |
7180 | int ret; | |
7181 | ||
b5a1a81e | 7182 | ret = set_callback_cred(); |
d85ed443 | 7183 | if (ret) |
f7d1ddbe KM |
7184 | return ret; |
7185 | ||
51a54568 | 7186 | laundry_wq = alloc_workqueue("%s", WQ_UNBOUND, 0, "nfsd4"); |
a6d6b781 JL |
7187 | if (laundry_wq == NULL) { |
7188 | ret = -ENOMEM; | |
f7d1ddbe | 7189 | goto out_cleanup_cred; |
a6d6b781 | 7190 | } |
b5a1a81e BF |
7191 | ret = nfsd4_create_callback_queue(); |
7192 | if (ret) | |
7193 | goto out_free_laundry; | |
09121281 | 7194 | |
c2f1a551 | 7195 | set_max_delegations(); |
b5a1a81e | 7196 | return 0; |
d85ed443 | 7197 | |
b5a1a81e BF |
7198 | out_free_laundry: |
7199 | destroy_workqueue(laundry_wq); | |
f7d1ddbe KM |
7200 | out_cleanup_cred: |
7201 | cleanup_callback_cred(); | |
b5a1a81e | 7202 | return ret; |
1da177e4 LT |
7203 | } |
7204 | ||
f252bc68 | 7205 | void |
4dce0ac9 | 7206 | nfs4_state_shutdown_net(struct net *net) |
1da177e4 | 7207 | { |
1da177e4 | 7208 | struct nfs4_delegation *dp = NULL; |
1da177e4 | 7209 | struct list_head *pos, *next, reaplist; |
4dce0ac9 | 7210 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
7919d0a2 | 7211 | struct nfsd4_blocked_lock *nbl; |
1da177e4 | 7212 | |
4dce0ac9 SK |
7213 | cancel_delayed_work_sync(&nn->laundromat_work); |
7214 | locks_end_grace(&nn->nfsd4_manager); | |
ac55fdc4 | 7215 | |
1da177e4 | 7216 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 7217 | spin_lock(&state_lock); |
e8c69d17 | 7218 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 | 7219 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
3fcbbd24 | 7220 | WARN_ON(!unhash_delegation_locked(dp)); |
42690676 | 7221 | list_add(&dp->dl_recall_lru, &reaplist); |
1da177e4 | 7222 | } |
cdc97505 | 7223 | spin_unlock(&state_lock); |
1da177e4 LT |
7224 | list_for_each_safe(pos, next, &reaplist) { |
7225 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
42690676 | 7226 | list_del_init(&dp->dl_recall_lru); |
8287f009 | 7227 | put_clnt_odstate(dp->dl_clnt_odstate); |
afbda402 | 7228 | nfs4_put_deleg_lease(dp->dl_stid.sc_file); |
6011695d | 7229 | nfs4_put_stid(&dp->dl_stid); |
1da177e4 LT |
7230 | } |
7231 | ||
7919d0a2 | 7232 | BUG_ON(!list_empty(&reaplist)); |
0cc11a61 | 7233 | spin_lock(&nn->blocked_locks_lock); |
7919d0a2 JL |
7234 | while (!list_empty(&nn->blocked_locks_lru)) { |
7235 | nbl = list_first_entry(&nn->blocked_locks_lru, | |
7236 | struct nfsd4_blocked_lock, nbl_lru); | |
7237 | list_move(&nbl->nbl_lru, &reaplist); | |
7238 | list_del_init(&nbl->nbl_list); | |
7239 | } | |
0cc11a61 | 7240 | spin_unlock(&nn->blocked_locks_lock); |
7919d0a2 JL |
7241 | |
7242 | while (!list_empty(&reaplist)) { | |
64ebe124 | 7243 | nbl = list_first_entry(&reaplist, |
7919d0a2 JL |
7244 | struct nfsd4_blocked_lock, nbl_lru); |
7245 | list_del_init(&nbl->nbl_lru); | |
7246 | posix_unblock_lock(&nbl->nbl_lock); | |
7247 | free_blocked_lock(nbl); | |
7248 | } | |
7249 | ||
3320fef1 | 7250 | nfsd4_client_tracking_exit(net); |
4dce0ac9 | 7251 | nfs4_state_destroy_net(net); |
1da177e4 LT |
7252 | } |
7253 | ||
7254 | void | |
7255 | nfs4_state_shutdown(void) | |
7256 | { | |
5e8d5c29 | 7257 | destroy_workqueue(laundry_wq); |
c3935e30 | 7258 | nfsd4_destroy_callback_queue(); |
f7d1ddbe | 7259 | cleanup_callback_cred(); |
1da177e4 | 7260 | } |
8b70484c TM |
7261 | |
7262 | static void | |
7263 | get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
7264 | { | |
37c593c5 TM |
7265 | if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) |
7266 | memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); | |
8b70484c TM |
7267 | } |
7268 | ||
7269 | static void | |
7270 | put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
7271 | { | |
37c593c5 TM |
7272 | if (cstate->minorversion) { |
7273 | memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); | |
7274 | SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
7275 | } | |
7276 | } | |
7277 | ||
7278 | void | |
7279 | clear_current_stateid(struct nfsd4_compound_state *cstate) | |
7280 | { | |
7281 | CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
8b70484c TM |
7282 | } |
7283 | ||
62cd4a59 TM |
7284 | /* |
7285 | * functions to set current state id | |
7286 | */ | |
9428fe1a | 7287 | void |
b60e9859 CH |
7288 | nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, |
7289 | union nfsd4_op_u *u) | |
9428fe1a | 7290 | { |
b60e9859 | 7291 | put_stateid(cstate, &u->open_downgrade.od_stateid); |
9428fe1a TM |
7292 | } |
7293 | ||
8b70484c | 7294 | void |
b60e9859 CH |
7295 | nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, |
7296 | union nfsd4_op_u *u) | |
8b70484c | 7297 | { |
b60e9859 | 7298 | put_stateid(cstate, &u->open.op_stateid); |
8b70484c TM |
7299 | } |
7300 | ||
62cd4a59 | 7301 | void |
b60e9859 CH |
7302 | nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, |
7303 | union nfsd4_op_u *u) | |
62cd4a59 | 7304 | { |
b60e9859 | 7305 | put_stateid(cstate, &u->close.cl_stateid); |
62cd4a59 TM |
7306 | } |
7307 | ||
7308 | void | |
b60e9859 CH |
7309 | nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, |
7310 | union nfsd4_op_u *u) | |
62cd4a59 | 7311 | { |
b60e9859 | 7312 | put_stateid(cstate, &u->lock.lk_resp_stateid); |
62cd4a59 TM |
7313 | } |
7314 | ||
7315 | /* | |
7316 | * functions to consume current state id | |
7317 | */ | |
1e97b519 | 7318 | |
9428fe1a | 7319 | void |
57832e7b CH |
7320 | nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, |
7321 | union nfsd4_op_u *u) | |
9428fe1a | 7322 | { |
57832e7b | 7323 | get_stateid(cstate, &u->open_downgrade.od_stateid); |
9428fe1a TM |
7324 | } |
7325 | ||
7326 | void | |
57832e7b CH |
7327 | nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, |
7328 | union nfsd4_op_u *u) | |
9428fe1a | 7329 | { |
57832e7b | 7330 | get_stateid(cstate, &u->delegreturn.dr_stateid); |
9428fe1a TM |
7331 | } |
7332 | ||
1e97b519 | 7333 | void |
57832e7b CH |
7334 | nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, |
7335 | union nfsd4_op_u *u) | |
1e97b519 | 7336 | { |
57832e7b | 7337 | get_stateid(cstate, &u->free_stateid.fr_stateid); |
1e97b519 TM |
7338 | } |
7339 | ||
7340 | void | |
57832e7b CH |
7341 | nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, |
7342 | union nfsd4_op_u *u) | |
1e97b519 | 7343 | { |
57832e7b | 7344 | get_stateid(cstate, &u->setattr.sa_stateid); |
1e97b519 TM |
7345 | } |
7346 | ||
8b70484c | 7347 | void |
57832e7b CH |
7348 | nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, |
7349 | union nfsd4_op_u *u) | |
8b70484c | 7350 | { |
57832e7b | 7351 | get_stateid(cstate, &u->close.cl_stateid); |
8b70484c TM |
7352 | } |
7353 | ||
7354 | void | |
57832e7b CH |
7355 | nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, |
7356 | union nfsd4_op_u *u) | |
8b70484c | 7357 | { |
57832e7b | 7358 | get_stateid(cstate, &u->locku.lu_stateid); |
8b70484c | 7359 | } |
30813e27 TM |
7360 | |
7361 | void | |
57832e7b CH |
7362 | nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, |
7363 | union nfsd4_op_u *u) | |
30813e27 | 7364 | { |
57832e7b | 7365 | get_stateid(cstate, &u->read.rd_stateid); |
30813e27 TM |
7366 | } |
7367 | ||
7368 | void | |
57832e7b CH |
7369 | nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, |
7370 | union nfsd4_op_u *u) | |
30813e27 | 7371 | { |
57832e7b | 7372 | get_stateid(cstate, &u->write.wr_stateid); |
30813e27 | 7373 | } |