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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (c) 2001 The Regents of the University of Michigan. |
3 | * All rights reserved. | |
4 | * | |
5 | * Kendrick Smith <kmsmith@umich.edu> | |
6 | * Andy Adamson <kandros@umich.edu> | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * | |
12 | * 1. Redistributions of source code must retain the above copyright | |
13 | * notice, this list of conditions and the following disclaimer. | |
14 | * 2. Redistributions in binary form must reproduce the above copyright | |
15 | * notice, this list of conditions and the following disclaimer in the | |
16 | * documentation and/or other materials provided with the distribution. | |
17 | * 3. Neither the name of the University nor the names of its | |
18 | * contributors may be used to endorse or promote products derived | |
19 | * from this software without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
22 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
23 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
24 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
26 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
27 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
28 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
29 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
30 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
31 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
32 | * | |
33 | */ | |
34 | ||
aceaf78d | 35 | #include <linux/file.h> |
b89f4321 | 36 | #include <linux/fs.h> |
5a0e3ad6 | 37 | #include <linux/slab.h> |
0964a3d3 | 38 | #include <linux/namei.h> |
c2f1a551 | 39 | #include <linux/swap.h> |
17456804 | 40 | #include <linux/pagemap.h> |
7df302f7 | 41 | #include <linux/ratelimit.h> |
68e76ad0 | 42 | #include <linux/sunrpc/svcauth_gss.h> |
5976687a | 43 | #include <linux/sunrpc/addr.h> |
87545899 | 44 | #include <linux/jhash.h> |
9a74af21 | 45 | #include "xdr4.h" |
06b332a5 | 46 | #include "xdr4cb.h" |
0a3adade | 47 | #include "vfs.h" |
bfa4b365 | 48 | #include "current_stateid.h" |
1da177e4 | 49 | |
5e1533c7 | 50 | #include "netns.h" |
9cf514cc | 51 | #include "pnfs.h" |
5e1533c7 | 52 | |
1da177e4 LT |
53 | #define NFSDDBG_FACILITY NFSDDBG_PROC |
54 | ||
f32f3c2d BF |
55 | #define all_ones {{~0,~0},~0} |
56 | static const stateid_t one_stateid = { | |
57 | .si_generation = ~0, | |
58 | .si_opaque = all_ones, | |
59 | }; | |
60 | static const stateid_t zero_stateid = { | |
61 | /* all fields zero */ | |
62 | }; | |
19ff0f28 TM |
63 | static const stateid_t currentstateid = { |
64 | .si_generation = 1, | |
65 | }; | |
f32f3c2d | 66 | |
ec6b5d7b | 67 | static u64 current_sessionid = 1; |
fd39ca9a | 68 | |
f32f3c2d BF |
69 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t))) |
70 | #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t))) | |
19ff0f28 | 71 | #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t))) |
1da177e4 | 72 | |
1da177e4 | 73 | /* forward declarations */ |
f9c00c3a | 74 | static bool check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner); |
6011695d | 75 | static void nfs4_free_ol_stateid(struct nfs4_stid *stid); |
1da177e4 | 76 | |
8b671b80 BF |
77 | /* Locking: */ |
78 | ||
8b671b80 BF |
79 | /* |
80 | * Currently used for the del_recall_lru and file hash table. In an | |
81 | * effort to decrease the scope of the client_mutex, this spinlock may | |
82 | * eventually cover more: | |
83 | */ | |
cdc97505 | 84 | static DEFINE_SPINLOCK(state_lock); |
8b671b80 | 85 | |
b401be22 JL |
86 | /* |
87 | * A waitqueue for all in-progress 4.0 CLOSE operations that are waiting for | |
88 | * the refcount on the open stateid to drop. | |
89 | */ | |
90 | static DECLARE_WAIT_QUEUE_HEAD(close_wq); | |
91 | ||
abf1135b CH |
92 | static struct kmem_cache *openowner_slab; |
93 | static struct kmem_cache *lockowner_slab; | |
94 | static struct kmem_cache *file_slab; | |
95 | static struct kmem_cache *stateid_slab; | |
96 | static struct kmem_cache *deleg_slab; | |
8287f009 | 97 | static struct kmem_cache *odstate_slab; |
e60d4398 | 98 | |
66b2b9b2 | 99 | static void free_session(struct nfsd4_session *); |
508dc6e1 | 100 | |
0162ac2b CH |
101 | static struct nfsd4_callback_ops nfsd4_cb_recall_ops; |
102 | ||
f0f51f5c | 103 | static bool is_session_dead(struct nfsd4_session *ses) |
66b2b9b2 | 104 | { |
f0f51f5c | 105 | return ses->se_flags & NFS4_SESSION_DEAD; |
66b2b9b2 BF |
106 | } |
107 | ||
f0f51f5c | 108 | static __be32 mark_session_dead_locked(struct nfsd4_session *ses, int ref_held_by_me) |
508dc6e1 | 109 | { |
f0f51f5c | 110 | if (atomic_read(&ses->se_ref) > ref_held_by_me) |
66b2b9b2 BF |
111 | return nfserr_jukebox; |
112 | ses->se_flags |= NFS4_SESSION_DEAD; | |
113 | return nfs_ok; | |
508dc6e1 BH |
114 | } |
115 | ||
221a6876 BF |
116 | static bool is_client_expired(struct nfs4_client *clp) |
117 | { | |
118 | return clp->cl_time == 0; | |
119 | } | |
120 | ||
221a6876 BF |
121 | static __be32 get_client_locked(struct nfs4_client *clp) |
122 | { | |
0a880a28 TM |
123 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
124 | ||
125 | lockdep_assert_held(&nn->client_lock); | |
126 | ||
221a6876 BF |
127 | if (is_client_expired(clp)) |
128 | return nfserr_expired; | |
129 | atomic_inc(&clp->cl_refcount); | |
130 | return nfs_ok; | |
131 | } | |
132 | ||
133 | /* must be called under the client_lock */ | |
134 | static inline void | |
135 | renew_client_locked(struct nfs4_client *clp) | |
136 | { | |
137 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
138 | ||
139 | if (is_client_expired(clp)) { | |
140 | WARN_ON(1); | |
141 | printk("%s: client (clientid %08x/%08x) already expired\n", | |
142 | __func__, | |
143 | clp->cl_clientid.cl_boot, | |
144 | clp->cl_clientid.cl_id); | |
145 | return; | |
146 | } | |
147 | ||
148 | dprintk("renewing client (clientid %08x/%08x)\n", | |
149 | clp->cl_clientid.cl_boot, | |
150 | clp->cl_clientid.cl_id); | |
151 | list_move_tail(&clp->cl_lru, &nn->client_lru); | |
152 | clp->cl_time = get_seconds(); | |
153 | } | |
154 | ||
ba138435 | 155 | static void put_client_renew_locked(struct nfs4_client *clp) |
221a6876 | 156 | { |
0a880a28 TM |
157 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
158 | ||
159 | lockdep_assert_held(&nn->client_lock); | |
160 | ||
221a6876 BF |
161 | if (!atomic_dec_and_test(&clp->cl_refcount)) |
162 | return; | |
163 | if (!is_client_expired(clp)) | |
164 | renew_client_locked(clp); | |
165 | } | |
166 | ||
4b24ca7d JL |
167 | static void put_client_renew(struct nfs4_client *clp) |
168 | { | |
169 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
170 | ||
d6c249b4 JL |
171 | if (!atomic_dec_and_lock(&clp->cl_refcount, &nn->client_lock)) |
172 | return; | |
173 | if (!is_client_expired(clp)) | |
174 | renew_client_locked(clp); | |
4b24ca7d JL |
175 | spin_unlock(&nn->client_lock); |
176 | } | |
177 | ||
d4e19e70 TM |
178 | static __be32 nfsd4_get_session_locked(struct nfsd4_session *ses) |
179 | { | |
180 | __be32 status; | |
181 | ||
182 | if (is_session_dead(ses)) | |
183 | return nfserr_badsession; | |
184 | status = get_client_locked(ses->se_client); | |
185 | if (status) | |
186 | return status; | |
187 | atomic_inc(&ses->se_ref); | |
188 | return nfs_ok; | |
189 | } | |
190 | ||
191 | static void nfsd4_put_session_locked(struct nfsd4_session *ses) | |
192 | { | |
193 | struct nfs4_client *clp = ses->se_client; | |
0a880a28 TM |
194 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
195 | ||
196 | lockdep_assert_held(&nn->client_lock); | |
d4e19e70 TM |
197 | |
198 | if (atomic_dec_and_test(&ses->se_ref) && is_session_dead(ses)) | |
199 | free_session(ses); | |
200 | put_client_renew_locked(clp); | |
201 | } | |
202 | ||
203 | static void nfsd4_put_session(struct nfsd4_session *ses) | |
204 | { | |
205 | struct nfs4_client *clp = ses->se_client; | |
206 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
207 | ||
208 | spin_lock(&nn->client_lock); | |
209 | nfsd4_put_session_locked(ses); | |
210 | spin_unlock(&nn->client_lock); | |
211 | } | |
212 | ||
b5971afa KM |
213 | static inline struct nfs4_stateowner * |
214 | nfs4_get_stateowner(struct nfs4_stateowner *sop) | |
215 | { | |
216 | atomic_inc(&sop->so_count); | |
217 | return sop; | |
218 | } | |
219 | ||
7ffb5880 | 220 | static int |
d4f0489f | 221 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner) |
7ffb5880 TM |
222 | { |
223 | return (sop->so_owner.len == owner->len) && | |
d4f0489f | 224 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len); |
7ffb5880 TM |
225 | } |
226 | ||
227 | static struct nfs4_openowner * | |
228 | find_openstateowner_str_locked(unsigned int hashval, struct nfsd4_open *open, | |
d4f0489f | 229 | struct nfs4_client *clp) |
7ffb5880 TM |
230 | { |
231 | struct nfs4_stateowner *so; | |
7ffb5880 | 232 | |
d4f0489f | 233 | lockdep_assert_held(&clp->cl_lock); |
7ffb5880 | 234 | |
d4f0489f TM |
235 | list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[hashval], |
236 | so_strhash) { | |
7ffb5880 TM |
237 | if (!so->so_is_open_owner) |
238 | continue; | |
b5971afa KM |
239 | if (same_owner_str(so, &open->op_owner)) |
240 | return openowner(nfs4_get_stateowner(so)); | |
7ffb5880 TM |
241 | } |
242 | return NULL; | |
243 | } | |
244 | ||
245 | static struct nfs4_openowner * | |
246 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, | |
d4f0489f | 247 | struct nfs4_client *clp) |
7ffb5880 TM |
248 | { |
249 | struct nfs4_openowner *oo; | |
250 | ||
d4f0489f TM |
251 | spin_lock(&clp->cl_lock); |
252 | oo = find_openstateowner_str_locked(hashval, open, clp); | |
253 | spin_unlock(&clp->cl_lock); | |
7ffb5880 TM |
254 | return oo; |
255 | } | |
256 | ||
1da177e4 LT |
257 | static inline u32 |
258 | opaque_hashval(const void *ptr, int nbytes) | |
259 | { | |
260 | unsigned char *cptr = (unsigned char *) ptr; | |
261 | ||
262 | u32 x = 0; | |
263 | while (nbytes--) { | |
264 | x *= 37; | |
265 | x += *cptr++; | |
266 | } | |
267 | return x; | |
268 | } | |
269 | ||
5b095e99 | 270 | static void nfsd4_free_file_rcu(struct rcu_head *rcu) |
32513b40 | 271 | { |
5b095e99 JL |
272 | struct nfs4_file *fp = container_of(rcu, struct nfs4_file, fi_rcu); |
273 | ||
274 | kmem_cache_free(file_slab, fp); | |
32513b40 BF |
275 | } |
276 | ||
e6ba76e1 | 277 | void |
13cd2184 N |
278 | put_nfs4_file(struct nfs4_file *fi) |
279 | { | |
02e1215f JL |
280 | might_lock(&state_lock); |
281 | ||
cdc97505 | 282 | if (atomic_dec_and_lock(&fi->fi_ref, &state_lock)) { |
5b095e99 | 283 | hlist_del_rcu(&fi->fi_hash); |
cdc97505 | 284 | spin_unlock(&state_lock); |
8287f009 | 285 | WARN_ON_ONCE(!list_empty(&fi->fi_clnt_odstate)); |
5b095e99 JL |
286 | WARN_ON_ONCE(!list_empty(&fi->fi_delegations)); |
287 | call_rcu(&fi->fi_rcu, nfsd4_free_file_rcu); | |
8b671b80 | 288 | } |
13cd2184 N |
289 | } |
290 | ||
de18643d TM |
291 | static struct file * |
292 | __nfs4_get_fd(struct nfs4_file *f, int oflag) | |
293 | { | |
294 | if (f->fi_fds[oflag]) | |
295 | return get_file(f->fi_fds[oflag]); | |
296 | return NULL; | |
297 | } | |
298 | ||
299 | static struct file * | |
300 | find_writeable_file_locked(struct nfs4_file *f) | |
301 | { | |
302 | struct file *ret; | |
303 | ||
304 | lockdep_assert_held(&f->fi_lock); | |
305 | ||
306 | ret = __nfs4_get_fd(f, O_WRONLY); | |
307 | if (!ret) | |
308 | ret = __nfs4_get_fd(f, O_RDWR); | |
309 | return ret; | |
310 | } | |
311 | ||
312 | static struct file * | |
313 | find_writeable_file(struct nfs4_file *f) | |
314 | { | |
315 | struct file *ret; | |
316 | ||
317 | spin_lock(&f->fi_lock); | |
318 | ret = find_writeable_file_locked(f); | |
319 | spin_unlock(&f->fi_lock); | |
320 | ||
321 | return ret; | |
322 | } | |
323 | ||
324 | static struct file *find_readable_file_locked(struct nfs4_file *f) | |
325 | { | |
326 | struct file *ret; | |
327 | ||
328 | lockdep_assert_held(&f->fi_lock); | |
329 | ||
330 | ret = __nfs4_get_fd(f, O_RDONLY); | |
331 | if (!ret) | |
332 | ret = __nfs4_get_fd(f, O_RDWR); | |
333 | return ret; | |
334 | } | |
335 | ||
336 | static struct file * | |
337 | find_readable_file(struct nfs4_file *f) | |
338 | { | |
339 | struct file *ret; | |
340 | ||
341 | spin_lock(&f->fi_lock); | |
342 | ret = find_readable_file_locked(f); | |
343 | spin_unlock(&f->fi_lock); | |
344 | ||
345 | return ret; | |
346 | } | |
347 | ||
4d227fca | 348 | struct file * |
de18643d TM |
349 | find_any_file(struct nfs4_file *f) |
350 | { | |
351 | struct file *ret; | |
352 | ||
353 | spin_lock(&f->fi_lock); | |
354 | ret = __nfs4_get_fd(f, O_RDWR); | |
355 | if (!ret) { | |
356 | ret = __nfs4_get_fd(f, O_WRONLY); | |
357 | if (!ret) | |
358 | ret = __nfs4_get_fd(f, O_RDONLY); | |
359 | } | |
360 | spin_unlock(&f->fi_lock); | |
361 | return ret; | |
362 | } | |
363 | ||
02a3508d | 364 | static atomic_long_t num_delegations; |
697ce9be | 365 | unsigned long max_delegations; |
ef0f3390 N |
366 | |
367 | /* | |
368 | * Open owner state (share locks) | |
369 | */ | |
370 | ||
16bfdaaf BF |
371 | /* hash tables for lock and open owners */ |
372 | #define OWNER_HASH_BITS 8 | |
373 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
374 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
ef0f3390 | 375 | |
d4f0489f | 376 | static unsigned int ownerstr_hashval(struct xdr_netobj *ownername) |
ddc04c41 BF |
377 | { |
378 | unsigned int ret; | |
379 | ||
380 | ret = opaque_hashval(ownername->data, ownername->len); | |
16bfdaaf | 381 | return ret & OWNER_HASH_MASK; |
ddc04c41 | 382 | } |
ef0f3390 | 383 | |
ef0f3390 N |
384 | /* hash table for nfs4_file */ |
385 | #define FILE_HASH_BITS 8 | |
386 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
35079582 | 387 | |
ca943217 | 388 | static unsigned int nfsd_fh_hashval(struct knfsd_fh *fh) |
ddc04c41 | 389 | { |
ca943217 TM |
390 | return jhash2(fh->fh_base.fh_pad, XDR_QUADLEN(fh->fh_size), 0); |
391 | } | |
392 | ||
393 | static unsigned int file_hashval(struct knfsd_fh *fh) | |
394 | { | |
395 | return nfsd_fh_hashval(fh) & (FILE_HASH_SIZE - 1); | |
396 | } | |
397 | ||
89876f8c | 398 | static struct hlist_head file_hashtbl[FILE_HASH_SIZE]; |
ef0f3390 | 399 | |
12659651 JL |
400 | static void |
401 | __nfs4_file_get_access(struct nfs4_file *fp, u32 access) | |
3477565e | 402 | { |
7214e860 JL |
403 | lockdep_assert_held(&fp->fi_lock); |
404 | ||
12659651 JL |
405 | if (access & NFS4_SHARE_ACCESS_WRITE) |
406 | atomic_inc(&fp->fi_access[O_WRONLY]); | |
407 | if (access & NFS4_SHARE_ACCESS_READ) | |
408 | atomic_inc(&fp->fi_access[O_RDONLY]); | |
3477565e BF |
409 | } |
410 | ||
12659651 JL |
411 | static __be32 |
412 | nfs4_file_get_access(struct nfs4_file *fp, u32 access) | |
998db52c | 413 | { |
7214e860 JL |
414 | lockdep_assert_held(&fp->fi_lock); |
415 | ||
12659651 JL |
416 | /* Does this access mode make sense? */ |
417 | if (access & ~NFS4_SHARE_ACCESS_BOTH) | |
418 | return nfserr_inval; | |
419 | ||
baeb4ff0 JL |
420 | /* Does it conflict with a deny mode already set? */ |
421 | if ((access & fp->fi_share_deny) != 0) | |
422 | return nfserr_share_denied; | |
423 | ||
12659651 JL |
424 | __nfs4_file_get_access(fp, access); |
425 | return nfs_ok; | |
998db52c BF |
426 | } |
427 | ||
baeb4ff0 JL |
428 | static __be32 nfs4_file_check_deny(struct nfs4_file *fp, u32 deny) |
429 | { | |
430 | /* Common case is that there is no deny mode. */ | |
431 | if (deny) { | |
432 | /* Does this deny mode make sense? */ | |
433 | if (deny & ~NFS4_SHARE_DENY_BOTH) | |
434 | return nfserr_inval; | |
435 | ||
436 | if ((deny & NFS4_SHARE_DENY_READ) && | |
437 | atomic_read(&fp->fi_access[O_RDONLY])) | |
438 | return nfserr_share_denied; | |
439 | ||
440 | if ((deny & NFS4_SHARE_DENY_WRITE) && | |
441 | atomic_read(&fp->fi_access[O_WRONLY])) | |
442 | return nfserr_share_denied; | |
443 | } | |
444 | return nfs_ok; | |
445 | } | |
446 | ||
998db52c | 447 | static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
f9d7562f | 448 | { |
de18643d TM |
449 | might_lock(&fp->fi_lock); |
450 | ||
451 | if (atomic_dec_and_lock(&fp->fi_access[oflag], &fp->fi_lock)) { | |
452 | struct file *f1 = NULL; | |
453 | struct file *f2 = NULL; | |
454 | ||
6d338b51 | 455 | swap(f1, fp->fi_fds[oflag]); |
0c7c3e67 | 456 | if (atomic_read(&fp->fi_access[1 - oflag]) == 0) |
6d338b51 | 457 | swap(f2, fp->fi_fds[O_RDWR]); |
de18643d TM |
458 | spin_unlock(&fp->fi_lock); |
459 | if (f1) | |
460 | fput(f1); | |
461 | if (f2) | |
462 | fput(f2); | |
f9d7562f BF |
463 | } |
464 | } | |
465 | ||
12659651 | 466 | static void nfs4_file_put_access(struct nfs4_file *fp, u32 access) |
998db52c | 467 | { |
12659651 JL |
468 | WARN_ON_ONCE(access & ~NFS4_SHARE_ACCESS_BOTH); |
469 | ||
470 | if (access & NFS4_SHARE_ACCESS_WRITE) | |
998db52c | 471 | __nfs4_file_put_access(fp, O_WRONLY); |
12659651 JL |
472 | if (access & NFS4_SHARE_ACCESS_READ) |
473 | __nfs4_file_put_access(fp, O_RDONLY); | |
998db52c BF |
474 | } |
475 | ||
8287f009 SB |
476 | /* |
477 | * Allocate a new open/delegation state counter. This is needed for | |
478 | * pNFS for proper return on close semantics. | |
479 | * | |
480 | * Note that we only allocate it for pNFS-enabled exports, otherwise | |
481 | * all pointers to struct nfs4_clnt_odstate are always NULL. | |
482 | */ | |
483 | static struct nfs4_clnt_odstate * | |
484 | alloc_clnt_odstate(struct nfs4_client *clp) | |
485 | { | |
486 | struct nfs4_clnt_odstate *co; | |
487 | ||
488 | co = kmem_cache_zalloc(odstate_slab, GFP_KERNEL); | |
489 | if (co) { | |
490 | co->co_client = clp; | |
491 | atomic_set(&co->co_odcount, 1); | |
492 | } | |
493 | return co; | |
494 | } | |
495 | ||
496 | static void | |
497 | hash_clnt_odstate_locked(struct nfs4_clnt_odstate *co) | |
498 | { | |
499 | struct nfs4_file *fp = co->co_file; | |
500 | ||
501 | lockdep_assert_held(&fp->fi_lock); | |
502 | list_add(&co->co_perfile, &fp->fi_clnt_odstate); | |
503 | } | |
504 | ||
505 | static inline void | |
506 | get_clnt_odstate(struct nfs4_clnt_odstate *co) | |
507 | { | |
508 | if (co) | |
509 | atomic_inc(&co->co_odcount); | |
510 | } | |
511 | ||
512 | static void | |
513 | put_clnt_odstate(struct nfs4_clnt_odstate *co) | |
514 | { | |
515 | struct nfs4_file *fp; | |
516 | ||
517 | if (!co) | |
518 | return; | |
519 | ||
520 | fp = co->co_file; | |
521 | if (atomic_dec_and_lock(&co->co_odcount, &fp->fi_lock)) { | |
522 | list_del(&co->co_perfile); | |
523 | spin_unlock(&fp->fi_lock); | |
524 | ||
525 | nfsd4_return_all_file_layouts(co->co_client, fp); | |
526 | kmem_cache_free(odstate_slab, co); | |
527 | } | |
528 | } | |
529 | ||
530 | static struct nfs4_clnt_odstate * | |
531 | find_or_hash_clnt_odstate(struct nfs4_file *fp, struct nfs4_clnt_odstate *new) | |
532 | { | |
533 | struct nfs4_clnt_odstate *co; | |
534 | struct nfs4_client *cl; | |
535 | ||
536 | if (!new) | |
537 | return NULL; | |
538 | ||
539 | cl = new->co_client; | |
540 | ||
541 | spin_lock(&fp->fi_lock); | |
542 | list_for_each_entry(co, &fp->fi_clnt_odstate, co_perfile) { | |
543 | if (co->co_client == cl) { | |
544 | get_clnt_odstate(co); | |
545 | goto out; | |
546 | } | |
547 | } | |
548 | co = new; | |
549 | co->co_file = fp; | |
550 | hash_clnt_odstate_locked(new); | |
551 | out: | |
552 | spin_unlock(&fp->fi_lock); | |
553 | return co; | |
554 | } | |
555 | ||
cd61c522 | 556 | struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, |
6011695d | 557 | struct kmem_cache *slab) |
2a74aba7 | 558 | { |
3abdb607 | 559 | struct nfs4_stid *stid; |
6136d2b4 | 560 | int new_id; |
2a74aba7 | 561 | |
f8338834 | 562 | stid = kmem_cache_zalloc(slab, GFP_KERNEL); |
3abdb607 BF |
563 | if (!stid) |
564 | return NULL; | |
565 | ||
4770d722 JL |
566 | idr_preload(GFP_KERNEL); |
567 | spin_lock(&cl->cl_lock); | |
568 | new_id = idr_alloc_cyclic(&cl->cl_stateids, stid, 0, 0, GFP_NOWAIT); | |
569 | spin_unlock(&cl->cl_lock); | |
570 | idr_preload_end(); | |
ebd6c707 | 571 | if (new_id < 0) |
3abdb607 | 572 | goto out_free; |
2a74aba7 | 573 | stid->sc_client = cl; |
3abdb607 BF |
574 | stid->sc_stateid.si_opaque.so_id = new_id; |
575 | stid->sc_stateid.si_opaque.so_clid = cl->cl_clientid; | |
2a74aba7 | 576 | /* Will be incremented before return to client: */ |
72c0b0fb | 577 | atomic_set(&stid->sc_count, 1); |
996e0938 | 578 | |
996e0938 | 579 | /* |
3abdb607 BF |
580 | * It shouldn't be a problem to reuse an opaque stateid value. |
581 | * I don't think it is for 4.1. But with 4.0 I worry that, for | |
582 | * example, a stray write retransmission could be accepted by | |
583 | * the server when it should have been rejected. Therefore, | |
584 | * adopt a trick from the sctp code to attempt to maximize the | |
585 | * amount of time until an id is reused, by ensuring they always | |
586 | * "increase" (mod INT_MAX): | |
996e0938 | 587 | */ |
3abdb607 BF |
588 | return stid; |
589 | out_free: | |
2c44a234 | 590 | kmem_cache_free(slab, stid); |
3abdb607 | 591 | return NULL; |
2a74aba7 BF |
592 | } |
593 | ||
b49e084d | 594 | static struct nfs4_ol_stateid * nfs4_alloc_open_stateid(struct nfs4_client *clp) |
4cdc951b | 595 | { |
6011695d TM |
596 | struct nfs4_stid *stid; |
597 | struct nfs4_ol_stateid *stp; | |
598 | ||
599 | stid = nfs4_alloc_stid(clp, stateid_slab); | |
600 | if (!stid) | |
601 | return NULL; | |
602 | ||
603 | stp = openlockstateid(stid); | |
604 | stp->st_stid.sc_free = nfs4_free_ol_stateid; | |
605 | return stp; | |
606 | } | |
607 | ||
608 | static void nfs4_free_deleg(struct nfs4_stid *stid) | |
609 | { | |
6011695d TM |
610 | kmem_cache_free(deleg_slab, stid); |
611 | atomic_long_dec(&num_delegations); | |
4cdc951b BF |
612 | } |
613 | ||
6282cd56 N |
614 | /* |
615 | * When we recall a delegation, we should be careful not to hand it | |
616 | * out again straight away. | |
617 | * To ensure this we keep a pair of bloom filters ('new' and 'old') | |
618 | * in which the filehandles of recalled delegations are "stored". | |
619 | * If a filehandle appear in either filter, a delegation is blocked. | |
620 | * When a delegation is recalled, the filehandle is stored in the "new" | |
621 | * filter. | |
622 | * Every 30 seconds we swap the filters and clear the "new" one, | |
623 | * unless both are empty of course. | |
624 | * | |
625 | * Each filter is 256 bits. We hash the filehandle to 32bit and use the | |
626 | * low 3 bytes as hash-table indices. | |
627 | * | |
f54fe962 | 628 | * 'blocked_delegations_lock', which is always taken in block_delegations(), |
6282cd56 N |
629 | * is used to manage concurrent access. Testing does not need the lock |
630 | * except when swapping the two filters. | |
631 | */ | |
f54fe962 | 632 | static DEFINE_SPINLOCK(blocked_delegations_lock); |
6282cd56 N |
633 | static struct bloom_pair { |
634 | int entries, old_entries; | |
635 | time_t swap_time; | |
636 | int new; /* index into 'set' */ | |
637 | DECLARE_BITMAP(set[2], 256); | |
638 | } blocked_delegations; | |
639 | ||
640 | static int delegation_blocked(struct knfsd_fh *fh) | |
641 | { | |
642 | u32 hash; | |
643 | struct bloom_pair *bd = &blocked_delegations; | |
644 | ||
645 | if (bd->entries == 0) | |
646 | return 0; | |
647 | if (seconds_since_boot() - bd->swap_time > 30) { | |
f54fe962 | 648 | spin_lock(&blocked_delegations_lock); |
6282cd56 N |
649 | if (seconds_since_boot() - bd->swap_time > 30) { |
650 | bd->entries -= bd->old_entries; | |
651 | bd->old_entries = bd->entries; | |
652 | memset(bd->set[bd->new], 0, | |
653 | sizeof(bd->set[0])); | |
654 | bd->new = 1-bd->new; | |
655 | bd->swap_time = seconds_since_boot(); | |
656 | } | |
f54fe962 | 657 | spin_unlock(&blocked_delegations_lock); |
6282cd56 | 658 | } |
87545899 | 659 | hash = jhash(&fh->fh_base, fh->fh_size, 0); |
6282cd56 N |
660 | if (test_bit(hash&255, bd->set[0]) && |
661 | test_bit((hash>>8)&255, bd->set[0]) && | |
662 | test_bit((hash>>16)&255, bd->set[0])) | |
663 | return 1; | |
664 | ||
665 | if (test_bit(hash&255, bd->set[1]) && | |
666 | test_bit((hash>>8)&255, bd->set[1]) && | |
667 | test_bit((hash>>16)&255, bd->set[1])) | |
668 | return 1; | |
669 | ||
670 | return 0; | |
671 | } | |
672 | ||
673 | static void block_delegations(struct knfsd_fh *fh) | |
674 | { | |
675 | u32 hash; | |
676 | struct bloom_pair *bd = &blocked_delegations; | |
677 | ||
87545899 | 678 | hash = jhash(&fh->fh_base, fh->fh_size, 0); |
6282cd56 | 679 | |
f54fe962 | 680 | spin_lock(&blocked_delegations_lock); |
6282cd56 N |
681 | __set_bit(hash&255, bd->set[bd->new]); |
682 | __set_bit((hash>>8)&255, bd->set[bd->new]); | |
683 | __set_bit((hash>>16)&255, bd->set[bd->new]); | |
684 | if (bd->entries == 0) | |
685 | bd->swap_time = seconds_since_boot(); | |
686 | bd->entries += 1; | |
f54fe962 | 687 | spin_unlock(&blocked_delegations_lock); |
6282cd56 N |
688 | } |
689 | ||
1da177e4 | 690 | static struct nfs4_delegation * |
8287f009 SB |
691 | alloc_init_deleg(struct nfs4_client *clp, struct svc_fh *current_fh, |
692 | struct nfs4_clnt_odstate *odstate) | |
1da177e4 LT |
693 | { |
694 | struct nfs4_delegation *dp; | |
02a3508d | 695 | long n; |
1da177e4 LT |
696 | |
697 | dprintk("NFSD alloc_init_deleg\n"); | |
02a3508d TM |
698 | n = atomic_long_inc_return(&num_delegations); |
699 | if (n < 0 || n > max_delegations) | |
700 | goto out_dec; | |
6282cd56 | 701 | if (delegation_blocked(¤t_fh->fh_handle)) |
02a3508d | 702 | goto out_dec; |
996e0938 | 703 | dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab)); |
5b2d21c1 | 704 | if (dp == NULL) |
02a3508d | 705 | goto out_dec; |
6011695d TM |
706 | |
707 | dp->dl_stid.sc_free = nfs4_free_deleg; | |
2a74aba7 BF |
708 | /* |
709 | * delegation seqid's are never incremented. The 4.1 special | |
6136d2b4 BF |
710 | * meaning of seqid 0 isn't meaningful, really, but let's avoid |
711 | * 0 anyway just for consistency and use 1: | |
2a74aba7 BF |
712 | */ |
713 | dp->dl_stid.sc_stateid.si_generation = 1; | |
ea1da636 N |
714 | INIT_LIST_HEAD(&dp->dl_perfile); |
715 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 | 716 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
8287f009 SB |
717 | dp->dl_clnt_odstate = odstate; |
718 | get_clnt_odstate(odstate); | |
99c41515 | 719 | dp->dl_type = NFS4_OPEN_DELEGATE_READ; |
f0b5de1b CH |
720 | dp->dl_retries = 1; |
721 | nfsd4_init_cb(&dp->dl_recall, dp->dl_stid.sc_client, | |
0162ac2b | 722 | &nfsd4_cb_recall_ops, NFSPROC4_CLNT_CB_RECALL); |
1da177e4 | 723 | return dp; |
02a3508d TM |
724 | out_dec: |
725 | atomic_long_dec(&num_delegations); | |
726 | return NULL; | |
1da177e4 LT |
727 | } |
728 | ||
729 | void | |
6011695d | 730 | nfs4_put_stid(struct nfs4_stid *s) |
1da177e4 | 731 | { |
11b9164a | 732 | struct nfs4_file *fp = s->sc_file; |
6011695d TM |
733 | struct nfs4_client *clp = s->sc_client; |
734 | ||
4770d722 JL |
735 | might_lock(&clp->cl_lock); |
736 | ||
b401be22 JL |
737 | if (!atomic_dec_and_lock(&s->sc_count, &clp->cl_lock)) { |
738 | wake_up_all(&close_wq); | |
6011695d | 739 | return; |
b401be22 | 740 | } |
6011695d | 741 | idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id); |
4770d722 | 742 | spin_unlock(&clp->cl_lock); |
6011695d | 743 | s->sc_free(s); |
11b9164a TM |
744 | if (fp) |
745 | put_nfs4_file(fp); | |
1da177e4 LT |
746 | } |
747 | ||
acfdf5c3 | 748 | static void nfs4_put_deleg_lease(struct nfs4_file *fp) |
1da177e4 | 749 | { |
6bcc034e | 750 | struct file *filp = NULL; |
417c6629 | 751 | |
6bcc034e | 752 | spin_lock(&fp->fi_lock); |
67db1034 | 753 | if (fp->fi_deleg_file && --fp->fi_delegees == 0) |
6bcc034e | 754 | swap(filp, fp->fi_deleg_file); |
6bcc034e JL |
755 | spin_unlock(&fp->fi_lock); |
756 | ||
757 | if (filp) { | |
2ab99ee1 | 758 | vfs_setlease(filp, F_UNLCK, NULL, (void **)&fp); |
6bcc034e | 759 | fput(filp); |
acfdf5c3 | 760 | } |
1da177e4 LT |
761 | } |
762 | ||
cd61c522 | 763 | void nfs4_unhash_stid(struct nfs4_stid *s) |
6136d2b4 | 764 | { |
3abdb607 | 765 | s->sc_type = 0; |
6136d2b4 BF |
766 | } |
767 | ||
931ee56c BH |
768 | static void |
769 | hash_delegation_locked(struct nfs4_delegation *dp, struct nfs4_file *fp) | |
770 | { | |
cdc97505 | 771 | lockdep_assert_held(&state_lock); |
417c6629 | 772 | lockdep_assert_held(&fp->fi_lock); |
931ee56c | 773 | |
67cb1279 | 774 | atomic_inc(&dp->dl_stid.sc_count); |
3fb87d13 | 775 | dp->dl_stid.sc_type = NFS4_DELEG_STID; |
931ee56c BH |
776 | list_add(&dp->dl_perfile, &fp->fi_delegations); |
777 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); | |
778 | } | |
779 | ||
1da177e4 | 780 | static void |
42690676 | 781 | unhash_delegation_locked(struct nfs4_delegation *dp) |
1da177e4 | 782 | { |
11b9164a | 783 | struct nfs4_file *fp = dp->dl_stid.sc_file; |
02e1215f | 784 | |
42690676 JL |
785 | lockdep_assert_held(&state_lock); |
786 | ||
b0fc29d6 | 787 | dp->dl_stid.sc_type = NFS4_CLOSED_DELEG_STID; |
d55a166c JL |
788 | /* Ensure that deleg break won't try to requeue it */ |
789 | ++dp->dl_time; | |
417c6629 | 790 | spin_lock(&fp->fi_lock); |
931ee56c | 791 | list_del_init(&dp->dl_perclnt); |
1da177e4 | 792 | list_del_init(&dp->dl_recall_lru); |
02e1215f JL |
793 | list_del_init(&dp->dl_perfile); |
794 | spin_unlock(&fp->fi_lock); | |
3bd64a5b BF |
795 | } |
796 | ||
3bd64a5b BF |
797 | static void destroy_delegation(struct nfs4_delegation *dp) |
798 | { | |
42690676 JL |
799 | spin_lock(&state_lock); |
800 | unhash_delegation_locked(dp); | |
801 | spin_unlock(&state_lock); | |
8287f009 | 802 | put_clnt_odstate(dp->dl_clnt_odstate); |
afbda402 | 803 | nfs4_put_deleg_lease(dp->dl_stid.sc_file); |
6011695d | 804 | nfs4_put_stid(&dp->dl_stid); |
3bd64a5b BF |
805 | } |
806 | ||
807 | static void revoke_delegation(struct nfs4_delegation *dp) | |
808 | { | |
809 | struct nfs4_client *clp = dp->dl_stid.sc_client; | |
810 | ||
2d4a532d JL |
811 | WARN_ON(!list_empty(&dp->dl_recall_lru)); |
812 | ||
8287f009 | 813 | put_clnt_odstate(dp->dl_clnt_odstate); |
afbda402 JL |
814 | nfs4_put_deleg_lease(dp->dl_stid.sc_file); |
815 | ||
3bd64a5b | 816 | if (clp->cl_minorversion == 0) |
6011695d | 817 | nfs4_put_stid(&dp->dl_stid); |
3bd64a5b | 818 | else { |
3bd64a5b | 819 | dp->dl_stid.sc_type = NFS4_REVOKED_DELEG_STID; |
2d4a532d JL |
820 | spin_lock(&clp->cl_lock); |
821 | list_add(&dp->dl_recall_lru, &clp->cl_revoked); | |
822 | spin_unlock(&clp->cl_lock); | |
3bd64a5b BF |
823 | } |
824 | } | |
825 | ||
1da177e4 LT |
826 | /* |
827 | * SETCLIENTID state | |
828 | */ | |
829 | ||
ddc04c41 BF |
830 | static unsigned int clientid_hashval(u32 id) |
831 | { | |
832 | return id & CLIENT_HASH_MASK; | |
833 | } | |
834 | ||
835 | static unsigned int clientstr_hashval(const char *name) | |
836 | { | |
837 | return opaque_hashval(name, 8) & CLIENT_HASH_MASK; | |
838 | } | |
839 | ||
f9d7562f BF |
840 | /* |
841 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
842 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
843 | * only what share bits are currently in force, but also what | |
844 | * combinations of share bits previous opens have used. This allows us | |
845 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
846 | * return an error if the client attempt to downgrade to a combination | |
847 | * of share bits not explicable by closing some of its previous opens. | |
848 | * | |
849 | * XXX: This enforcement is actually incomplete, since we don't keep | |
850 | * track of access/deny bit combinations; so, e.g., we allow: | |
851 | * | |
852 | * OPEN allow read, deny write | |
853 | * OPEN allow both, deny none | |
854 | * DOWNGRADE allow read, deny none | |
855 | * | |
856 | * which we should reject. | |
857 | */ | |
5ae037e5 JL |
858 | static unsigned int |
859 | bmap_to_share_mode(unsigned long bmap) { | |
f9d7562f | 860 | int i; |
5ae037e5 | 861 | unsigned int access = 0; |
f9d7562f | 862 | |
f9d7562f BF |
863 | for (i = 1; i < 4; i++) { |
864 | if (test_bit(i, &bmap)) | |
5ae037e5 | 865 | access |= i; |
f9d7562f | 866 | } |
5ae037e5 | 867 | return access; |
f9d7562f BF |
868 | } |
869 | ||
82c5ff1b JL |
870 | /* set share access for a given stateid */ |
871 | static inline void | |
872 | set_access(u32 access, struct nfs4_ol_stateid *stp) | |
873 | { | |
c11c591f JL |
874 | unsigned char mask = 1 << access; |
875 | ||
876 | WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH); | |
877 | stp->st_access_bmap |= mask; | |
82c5ff1b JL |
878 | } |
879 | ||
880 | /* clear share access for a given stateid */ | |
881 | static inline void | |
882 | clear_access(u32 access, struct nfs4_ol_stateid *stp) | |
883 | { | |
c11c591f JL |
884 | unsigned char mask = 1 << access; |
885 | ||
886 | WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH); | |
887 | stp->st_access_bmap &= ~mask; | |
82c5ff1b JL |
888 | } |
889 | ||
890 | /* test whether a given stateid has access */ | |
891 | static inline bool | |
892 | test_access(u32 access, struct nfs4_ol_stateid *stp) | |
893 | { | |
c11c591f JL |
894 | unsigned char mask = 1 << access; |
895 | ||
896 | return (bool)(stp->st_access_bmap & mask); | |
82c5ff1b JL |
897 | } |
898 | ||
ce0fc43c JL |
899 | /* set share deny for a given stateid */ |
900 | static inline void | |
c11c591f | 901 | set_deny(u32 deny, struct nfs4_ol_stateid *stp) |
ce0fc43c | 902 | { |
c11c591f JL |
903 | unsigned char mask = 1 << deny; |
904 | ||
905 | WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH); | |
906 | stp->st_deny_bmap |= mask; | |
ce0fc43c JL |
907 | } |
908 | ||
909 | /* clear share deny for a given stateid */ | |
910 | static inline void | |
c11c591f | 911 | clear_deny(u32 deny, struct nfs4_ol_stateid *stp) |
ce0fc43c | 912 | { |
c11c591f JL |
913 | unsigned char mask = 1 << deny; |
914 | ||
915 | WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH); | |
916 | stp->st_deny_bmap &= ~mask; | |
ce0fc43c JL |
917 | } |
918 | ||
919 | /* test whether a given stateid is denying specific access */ | |
920 | static inline bool | |
c11c591f | 921 | test_deny(u32 deny, struct nfs4_ol_stateid *stp) |
ce0fc43c | 922 | { |
c11c591f JL |
923 | unsigned char mask = 1 << deny; |
924 | ||
925 | return (bool)(stp->st_deny_bmap & mask); | |
f9d7562f BF |
926 | } |
927 | ||
928 | static int nfs4_access_to_omode(u32 access) | |
929 | { | |
8f34a430 | 930 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
931 | case NFS4_SHARE_ACCESS_READ: |
932 | return O_RDONLY; | |
933 | case NFS4_SHARE_ACCESS_WRITE: | |
934 | return O_WRONLY; | |
935 | case NFS4_SHARE_ACCESS_BOTH: | |
936 | return O_RDWR; | |
937 | } | |
063b0fb9 BF |
938 | WARN_ON_ONCE(1); |
939 | return O_RDONLY; | |
f9d7562f BF |
940 | } |
941 | ||
baeb4ff0 JL |
942 | /* |
943 | * A stateid that had a deny mode associated with it is being released | |
944 | * or downgraded. Recalculate the deny mode on the file. | |
945 | */ | |
946 | static void | |
947 | recalculate_deny_mode(struct nfs4_file *fp) | |
948 | { | |
949 | struct nfs4_ol_stateid *stp; | |
950 | ||
951 | spin_lock(&fp->fi_lock); | |
952 | fp->fi_share_deny = 0; | |
953 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) | |
954 | fp->fi_share_deny |= bmap_to_share_mode(stp->st_deny_bmap); | |
955 | spin_unlock(&fp->fi_lock); | |
956 | } | |
957 | ||
958 | static void | |
959 | reset_union_bmap_deny(u32 deny, struct nfs4_ol_stateid *stp) | |
960 | { | |
961 | int i; | |
962 | bool change = false; | |
963 | ||
964 | for (i = 1; i < 4; i++) { | |
965 | if ((i & deny) != i) { | |
966 | change = true; | |
967 | clear_deny(i, stp); | |
968 | } | |
969 | } | |
970 | ||
971 | /* Recalculate per-file deny mode if there was a change */ | |
972 | if (change) | |
11b9164a | 973 | recalculate_deny_mode(stp->st_stid.sc_file); |
baeb4ff0 JL |
974 | } |
975 | ||
82c5ff1b JL |
976 | /* release all access and file references for a given stateid */ |
977 | static void | |
978 | release_all_access(struct nfs4_ol_stateid *stp) | |
979 | { | |
980 | int i; | |
11b9164a | 981 | struct nfs4_file *fp = stp->st_stid.sc_file; |
baeb4ff0 JL |
982 | |
983 | if (fp && stp->st_deny_bmap != 0) | |
984 | recalculate_deny_mode(fp); | |
82c5ff1b JL |
985 | |
986 | for (i = 1; i < 4; i++) { | |
987 | if (test_access(i, stp)) | |
11b9164a | 988 | nfs4_file_put_access(stp->st_stid.sc_file, i); |
82c5ff1b JL |
989 | clear_access(i, stp); |
990 | } | |
991 | } | |
992 | ||
d50ffded KM |
993 | static inline void nfs4_free_stateowner(struct nfs4_stateowner *sop) |
994 | { | |
995 | kfree(sop->so_owner.data); | |
996 | sop->so_ops->so_free(sop); | |
997 | } | |
998 | ||
6b180f0b JL |
999 | static void nfs4_put_stateowner(struct nfs4_stateowner *sop) |
1000 | { | |
a819ecc1 JL |
1001 | struct nfs4_client *clp = sop->so_client; |
1002 | ||
1003 | might_lock(&clp->cl_lock); | |
1004 | ||
1005 | if (!atomic_dec_and_lock(&sop->so_count, &clp->cl_lock)) | |
6b180f0b | 1006 | return; |
8f4b54c5 | 1007 | sop->so_ops->so_unhash(sop); |
a819ecc1 | 1008 | spin_unlock(&clp->cl_lock); |
d50ffded | 1009 | nfs4_free_stateowner(sop); |
6b180f0b JL |
1010 | } |
1011 | ||
4ae098d3 | 1012 | static void unhash_ol_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 1013 | { |
11b9164a | 1014 | struct nfs4_file *fp = stp->st_stid.sc_file; |
1d31a253 | 1015 | |
1c755dc1 JL |
1016 | lockdep_assert_held(&stp->st_stateowner->so_client->cl_lock); |
1017 | ||
1d31a253 | 1018 | spin_lock(&fp->fi_lock); |
529d7b2a | 1019 | list_del(&stp->st_perfile); |
1d31a253 | 1020 | spin_unlock(&fp->fi_lock); |
529d7b2a BF |
1021 | list_del(&stp->st_perstateowner); |
1022 | } | |
1023 | ||
6011695d | 1024 | static void nfs4_free_ol_stateid(struct nfs4_stid *stid) |
529d7b2a | 1025 | { |
6011695d | 1026 | struct nfs4_ol_stateid *stp = openlockstateid(stid); |
4665e2ba | 1027 | |
8287f009 | 1028 | put_clnt_odstate(stp->st_clnt_odstate); |
6011695d | 1029 | release_all_access(stp); |
d3134b10 JL |
1030 | if (stp->st_stateowner) |
1031 | nfs4_put_stateowner(stp->st_stateowner); | |
6011695d | 1032 | kmem_cache_free(stateid_slab, stid); |
529d7b2a BF |
1033 | } |
1034 | ||
b49e084d | 1035 | static void nfs4_free_lock_stateid(struct nfs4_stid *stid) |
529d7b2a | 1036 | { |
b49e084d JL |
1037 | struct nfs4_ol_stateid *stp = openlockstateid(stid); |
1038 | struct nfs4_lockowner *lo = lockowner(stp->st_stateowner); | |
529d7b2a BF |
1039 | struct file *file; |
1040 | ||
b49e084d JL |
1041 | file = find_any_file(stp->st_stid.sc_file); |
1042 | if (file) | |
1043 | filp_close(file, (fl_owner_t)lo); | |
1044 | nfs4_free_ol_stateid(stid); | |
1045 | } | |
1046 | ||
2c41beb0 JL |
1047 | /* |
1048 | * Put the persistent reference to an already unhashed generic stateid, while | |
1049 | * holding the cl_lock. If it's the last reference, then put it onto the | |
1050 | * reaplist for later destruction. | |
1051 | */ | |
1052 | static void put_ol_stateid_locked(struct nfs4_ol_stateid *stp, | |
1053 | struct list_head *reaplist) | |
1054 | { | |
1055 | struct nfs4_stid *s = &stp->st_stid; | |
1056 | struct nfs4_client *clp = s->sc_client; | |
1057 | ||
1058 | lockdep_assert_held(&clp->cl_lock); | |
1059 | ||
1060 | WARN_ON_ONCE(!list_empty(&stp->st_locks)); | |
1061 | ||
1062 | if (!atomic_dec_and_test(&s->sc_count)) { | |
1063 | wake_up_all(&close_wq); | |
1064 | return; | |
1065 | } | |
1066 | ||
1067 | idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id); | |
1068 | list_add(&stp->st_locks, reaplist); | |
1069 | } | |
1070 | ||
3c1c995c | 1071 | static void unhash_lock_stateid(struct nfs4_ol_stateid *stp) |
b49e084d | 1072 | { |
1c755dc1 JL |
1073 | struct nfs4_openowner *oo = openowner(stp->st_openstp->st_stateowner); |
1074 | ||
3c1c995c JL |
1075 | lockdep_assert_held(&oo->oo_owner.so_client->cl_lock); |
1076 | ||
1077 | list_del_init(&stp->st_locks); | |
4ae098d3 | 1078 | unhash_ol_stateid(stp); |
cd61c522 | 1079 | nfs4_unhash_stid(&stp->st_stid); |
3c1c995c JL |
1080 | } |
1081 | ||
1082 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) | |
1083 | { | |
1084 | struct nfs4_openowner *oo = openowner(stp->st_openstp->st_stateowner); | |
1085 | ||
1086 | spin_lock(&oo->oo_owner.so_client->cl_lock); | |
1087 | unhash_lock_stateid(stp); | |
1c755dc1 | 1088 | spin_unlock(&oo->oo_owner.so_client->cl_lock); |
6011695d | 1089 | nfs4_put_stid(&stp->st_stid); |
529d7b2a BF |
1090 | } |
1091 | ||
c58c6610 | 1092 | static void unhash_lockowner_locked(struct nfs4_lockowner *lo) |
8f4b54c5 | 1093 | { |
d4f0489f | 1094 | struct nfs4_client *clp = lo->lo_owner.so_client; |
c58c6610 | 1095 | |
d4f0489f | 1096 | lockdep_assert_held(&clp->cl_lock); |
c58c6610 | 1097 | |
8f4b54c5 JL |
1098 | list_del_init(&lo->lo_owner.so_strhash); |
1099 | } | |
1100 | ||
2c41beb0 JL |
1101 | /* |
1102 | * Free a list of generic stateids that were collected earlier after being | |
1103 | * fully unhashed. | |
1104 | */ | |
1105 | static void | |
1106 | free_ol_stateid_reaplist(struct list_head *reaplist) | |
1107 | { | |
1108 | struct nfs4_ol_stateid *stp; | |
fb94d766 | 1109 | struct nfs4_file *fp; |
2c41beb0 JL |
1110 | |
1111 | might_sleep(); | |
1112 | ||
1113 | while (!list_empty(reaplist)) { | |
1114 | stp = list_first_entry(reaplist, struct nfs4_ol_stateid, | |
1115 | st_locks); | |
1116 | list_del(&stp->st_locks); | |
fb94d766 | 1117 | fp = stp->st_stid.sc_file; |
2c41beb0 | 1118 | stp->st_stid.sc_free(&stp->st_stid); |
fb94d766 KM |
1119 | if (fp) |
1120 | put_nfs4_file(fp); | |
2c41beb0 JL |
1121 | } |
1122 | } | |
1123 | ||
3c1c995c | 1124 | static void release_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 1125 | { |
d4f0489f | 1126 | struct nfs4_client *clp = lo->lo_owner.so_client; |
dcef0413 | 1127 | struct nfs4_ol_stateid *stp; |
3c1c995c | 1128 | struct list_head reaplist; |
529d7b2a | 1129 | |
3c1c995c | 1130 | INIT_LIST_HEAD(&reaplist); |
c58c6610 | 1131 | |
3c1c995c JL |
1132 | spin_lock(&clp->cl_lock); |
1133 | unhash_lockowner_locked(lo); | |
fe0750e5 BF |
1134 | while (!list_empty(&lo->lo_owner.so_stateids)) { |
1135 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
dcef0413 | 1136 | struct nfs4_ol_stateid, st_perstateowner); |
3c1c995c | 1137 | unhash_lock_stateid(stp); |
2c41beb0 | 1138 | put_ol_stateid_locked(stp, &reaplist); |
529d7b2a | 1139 | } |
d4f0489f | 1140 | spin_unlock(&clp->cl_lock); |
2c41beb0 | 1141 | free_ol_stateid_reaplist(&reaplist); |
6b180f0b | 1142 | nfs4_put_stateowner(&lo->lo_owner); |
529d7b2a BF |
1143 | } |
1144 | ||
d83017f9 JL |
1145 | static void release_open_stateid_locks(struct nfs4_ol_stateid *open_stp, |
1146 | struct list_head *reaplist) | |
3c87b9b7 TM |
1147 | { |
1148 | struct nfs4_ol_stateid *stp; | |
1149 | ||
1150 | while (!list_empty(&open_stp->st_locks)) { | |
1151 | stp = list_entry(open_stp->st_locks.next, | |
1152 | struct nfs4_ol_stateid, st_locks); | |
d83017f9 JL |
1153 | unhash_lock_stateid(stp); |
1154 | put_ol_stateid_locked(stp, reaplist); | |
529d7b2a BF |
1155 | } |
1156 | } | |
1157 | ||
d83017f9 JL |
1158 | static void unhash_open_stateid(struct nfs4_ol_stateid *stp, |
1159 | struct list_head *reaplist) | |
2283963f | 1160 | { |
2c41beb0 JL |
1161 | lockdep_assert_held(&stp->st_stid.sc_client->cl_lock); |
1162 | ||
4ae098d3 | 1163 | unhash_ol_stateid(stp); |
d83017f9 | 1164 | release_open_stateid_locks(stp, reaplist); |
38c387b5 BF |
1165 | } |
1166 | ||
1167 | static void release_open_stateid(struct nfs4_ol_stateid *stp) | |
1168 | { | |
2c41beb0 JL |
1169 | LIST_HEAD(reaplist); |
1170 | ||
1171 | spin_lock(&stp->st_stid.sc_client->cl_lock); | |
d83017f9 | 1172 | unhash_open_stateid(stp, &reaplist); |
2c41beb0 JL |
1173 | put_ol_stateid_locked(stp, &reaplist); |
1174 | spin_unlock(&stp->st_stid.sc_client->cl_lock); | |
1175 | free_ol_stateid_reaplist(&reaplist); | |
2283963f BF |
1176 | } |
1177 | ||
7ffb5880 | 1178 | static void unhash_openowner_locked(struct nfs4_openowner *oo) |
f1d110ca | 1179 | { |
d4f0489f | 1180 | struct nfs4_client *clp = oo->oo_owner.so_client; |
7ffb5880 | 1181 | |
d4f0489f | 1182 | lockdep_assert_held(&clp->cl_lock); |
7ffb5880 | 1183 | |
8f4b54c5 JL |
1184 | list_del_init(&oo->oo_owner.so_strhash); |
1185 | list_del_init(&oo->oo_perclient); | |
f1d110ca BF |
1186 | } |
1187 | ||
f7a4d872 BF |
1188 | static void release_last_closed_stateid(struct nfs4_openowner *oo) |
1189 | { | |
217526e7 JL |
1190 | struct nfsd_net *nn = net_generic(oo->oo_owner.so_client->net, |
1191 | nfsd_net_id); | |
1192 | struct nfs4_ol_stateid *s; | |
f7a4d872 | 1193 | |
217526e7 JL |
1194 | spin_lock(&nn->client_lock); |
1195 | s = oo->oo_last_closed_stid; | |
f7a4d872 | 1196 | if (s) { |
d3134b10 | 1197 | list_del_init(&oo->oo_close_lru); |
f7a4d872 BF |
1198 | oo->oo_last_closed_stid = NULL; |
1199 | } | |
217526e7 JL |
1200 | spin_unlock(&nn->client_lock); |
1201 | if (s) | |
1202 | nfs4_put_stid(&s->st_stid); | |
f7a4d872 BF |
1203 | } |
1204 | ||
2c41beb0 | 1205 | static void release_openowner(struct nfs4_openowner *oo) |
8f4b54c5 JL |
1206 | { |
1207 | struct nfs4_ol_stateid *stp; | |
d4f0489f | 1208 | struct nfs4_client *clp = oo->oo_owner.so_client; |
2c41beb0 | 1209 | struct list_head reaplist; |
7ffb5880 | 1210 | |
2c41beb0 | 1211 | INIT_LIST_HEAD(&reaplist); |
8f4b54c5 | 1212 | |
2c41beb0 JL |
1213 | spin_lock(&clp->cl_lock); |
1214 | unhash_openowner_locked(oo); | |
8f4b54c5 JL |
1215 | while (!list_empty(&oo->oo_owner.so_stateids)) { |
1216 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
1217 | struct nfs4_ol_stateid, st_perstateowner); | |
d83017f9 | 1218 | unhash_open_stateid(stp, &reaplist); |
2c41beb0 | 1219 | put_ol_stateid_locked(stp, &reaplist); |
8f4b54c5 | 1220 | } |
d4f0489f | 1221 | spin_unlock(&clp->cl_lock); |
2c41beb0 | 1222 | free_ol_stateid_reaplist(&reaplist); |
f7a4d872 | 1223 | release_last_closed_stateid(oo); |
6b180f0b | 1224 | nfs4_put_stateowner(&oo->oo_owner); |
f1d110ca BF |
1225 | } |
1226 | ||
5282fd72 ME |
1227 | static inline int |
1228 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
1229 | { | |
1230 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
1231 | ||
1232 | return sid->sequence % SESSION_HASH_SIZE; | |
1233 | } | |
1234 | ||
135dd002 | 1235 | #ifdef CONFIG_SUNRPC_DEBUG |
5282fd72 ME |
1236 | static inline void |
1237 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
1238 | { | |
1239 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
1240 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
1241 | } | |
8f199b82 TM |
1242 | #else |
1243 | static inline void | |
1244 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
1245 | { | |
1246 | } | |
1247 | #endif | |
1248 | ||
9411b1d4 BF |
1249 | /* |
1250 | * Bump the seqid on cstate->replay_owner, and clear replay_owner if it | |
1251 | * won't be used for replay. | |
1252 | */ | |
1253 | void nfsd4_bump_seqid(struct nfsd4_compound_state *cstate, __be32 nfserr) | |
1254 | { | |
1255 | struct nfs4_stateowner *so = cstate->replay_owner; | |
1256 | ||
1257 | if (nfserr == nfserr_replay_me) | |
1258 | return; | |
1259 | ||
1260 | if (!seqid_mutating_err(ntohl(nfserr))) { | |
58fb12e6 | 1261 | nfsd4_cstate_clear_replay(cstate); |
9411b1d4 BF |
1262 | return; |
1263 | } | |
1264 | if (!so) | |
1265 | return; | |
1266 | if (so->so_is_open_owner) | |
1267 | release_last_closed_stateid(openowner(so)); | |
1268 | so->so_seqid++; | |
1269 | return; | |
1270 | } | |
5282fd72 | 1271 | |
ec6b5d7b AA |
1272 | static void |
1273 | gen_sessionid(struct nfsd4_session *ses) | |
1274 | { | |
1275 | struct nfs4_client *clp = ses->se_client; | |
1276 | struct nfsd4_sessionid *sid; | |
1277 | ||
1278 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
1279 | sid->clientid = clp->cl_clientid; | |
1280 | sid->sequence = current_sessionid++; | |
1281 | sid->reserved = 0; | |
1282 | } | |
1283 | ||
1284 | /* | |
a649637c AA |
1285 | * The protocol defines ca_maxresponssize_cached to include the size of |
1286 | * the rpc header, but all we need to cache is the data starting after | |
1287 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
1288 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
1289 | * value that is the number of bytes in our cache plus a few additional | |
1290 | * bytes. In order to stay on the safe side, and not promise more than | |
1291 | * we can cache, those additional bytes must be the minimum possible: 24 | |
1292 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
1293 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
1294 | * for the SEQUENCE op response: | |
1295 | */ | |
1296 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
1297 | ||
557ce264 AA |
1298 | static void |
1299 | free_session_slots(struct nfsd4_session *ses) | |
1300 | { | |
1301 | int i; | |
1302 | ||
1303 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
1304 | kfree(ses->se_slots[i]); | |
1305 | } | |
1306 | ||
a649637c | 1307 | /* |
efe0cb6d BF |
1308 | * We don't actually need to cache the rpc and session headers, so we |
1309 | * can allocate a little less for each slot: | |
1310 | */ | |
55c760cf | 1311 | static inline u32 slot_bytes(struct nfsd4_channel_attrs *ca) |
efe0cb6d | 1312 | { |
55c760cf | 1313 | u32 size; |
efe0cb6d | 1314 | |
55c760cf BF |
1315 | if (ca->maxresp_cached < NFSD_MIN_HDR_SEQ_SZ) |
1316 | size = 0; | |
1317 | else | |
1318 | size = ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
1319 | return size + sizeof(struct nfsd4_slot); | |
5b6feee9 | 1320 | } |
ec6b5d7b | 1321 | |
5b6feee9 BF |
1322 | /* |
1323 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c | 1324 | * re-negotiate active sessions and reduce their slot usage to make |
42b2aa86 | 1325 | * room for new connections. For now we just fail the create session. |
ec6b5d7b | 1326 | */ |
55c760cf | 1327 | static u32 nfsd4_get_drc_mem(struct nfsd4_channel_attrs *ca) |
ec6b5d7b | 1328 | { |
55c760cf BF |
1329 | u32 slotsize = slot_bytes(ca); |
1330 | u32 num = ca->maxreqs; | |
5b6feee9 | 1331 | int avail; |
ec6b5d7b | 1332 | |
5b6feee9 | 1333 | spin_lock(&nfsd_drc_lock); |
697ce9be ZY |
1334 | avail = min((unsigned long)NFSD_MAX_MEM_PER_SESSION, |
1335 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
5b6feee9 BF |
1336 | num = min_t(int, num, avail / slotsize); |
1337 | nfsd_drc_mem_used += num * slotsize; | |
1338 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 1339 | |
5b6feee9 BF |
1340 | return num; |
1341 | } | |
ec6b5d7b | 1342 | |
55c760cf | 1343 | static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs *ca) |
5b6feee9 | 1344 | { |
55c760cf BF |
1345 | int slotsize = slot_bytes(ca); |
1346 | ||
4bd9b0f4 | 1347 | spin_lock(&nfsd_drc_lock); |
55c760cf | 1348 | nfsd_drc_mem_used -= slotsize * ca->maxreqs; |
4bd9b0f4 | 1349 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 1350 | } |
ec6b5d7b | 1351 | |
60810e54 KM |
1352 | static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fattrs, |
1353 | struct nfsd4_channel_attrs *battrs) | |
5b6feee9 | 1354 | { |
60810e54 KM |
1355 | int numslots = fattrs->maxreqs; |
1356 | int slotsize = slot_bytes(fattrs); | |
5b6feee9 BF |
1357 | struct nfsd4_session *new; |
1358 | int mem, i; | |
a649637c | 1359 | |
5b6feee9 BF |
1360 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
1361 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
1362 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 1363 | |
5b6feee9 BF |
1364 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
1365 | if (!new) | |
1366 | return NULL; | |
557ce264 | 1367 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 | 1368 | for (i = 0; i < numslots; i++) { |
55c760cf | 1369 | new->se_slots[i] = kzalloc(slotsize, GFP_KERNEL); |
5b6feee9 | 1370 | if (!new->se_slots[i]) |
557ce264 | 1371 | goto out_free; |
557ce264 | 1372 | } |
60810e54 KM |
1373 | |
1374 | memcpy(&new->se_fchannel, fattrs, sizeof(struct nfsd4_channel_attrs)); | |
1375 | memcpy(&new->se_bchannel, battrs, sizeof(struct nfsd4_channel_attrs)); | |
1376 | ||
5b6feee9 BF |
1377 | return new; |
1378 | out_free: | |
1379 | while (i--) | |
1380 | kfree(new->se_slots[i]); | |
1381 | kfree(new); | |
1382 | return NULL; | |
ec6b5d7b AA |
1383 | } |
1384 | ||
19cf5c02 BF |
1385 | static void free_conn(struct nfsd4_conn *c) |
1386 | { | |
1387 | svc_xprt_put(c->cn_xprt); | |
1388 | kfree(c); | |
1389 | } | |
ec6b5d7b | 1390 | |
19cf5c02 BF |
1391 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
1392 | { | |
1393 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
1394 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 1395 | |
19cf5c02 BF |
1396 | spin_lock(&clp->cl_lock); |
1397 | if (!list_empty(&c->cn_persession)) { | |
1398 | list_del(&c->cn_persession); | |
1399 | free_conn(c); | |
1400 | } | |
eea49806 | 1401 | nfsd4_probe_callback(clp); |
2e4b7239 | 1402 | spin_unlock(&clp->cl_lock); |
19cf5c02 | 1403 | } |
ec6b5d7b | 1404 | |
d29c374c | 1405 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 1406 | { |
c7662518 | 1407 | struct nfsd4_conn *conn; |
ec6b5d7b | 1408 | |
c7662518 BF |
1409 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
1410 | if (!conn) | |
db90681d | 1411 | return NULL; |
c7662518 BF |
1412 | svc_xprt_get(rqstp->rq_xprt); |
1413 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 1414 | conn->cn_flags = flags; |
db90681d BF |
1415 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
1416 | return conn; | |
1417 | } | |
a649637c | 1418 | |
328ead28 BF |
1419 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
1420 | { | |
1421 | conn->cn_session = ses; | |
1422 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
1423 | } |
1424 | ||
db90681d | 1425 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 1426 | { |
db90681d | 1427 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 1428 | |
c7662518 | 1429 | spin_lock(&clp->cl_lock); |
328ead28 | 1430 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 1431 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
1432 | } |
1433 | ||
21b75b01 | 1434 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 1435 | { |
19cf5c02 | 1436 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 1437 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
1438 | } |
1439 | ||
e1ff371f | 1440 | static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses) |
ec6b5d7b | 1441 | { |
21b75b01 | 1442 | int ret; |
ec6b5d7b | 1443 | |
db90681d | 1444 | nfsd4_hash_conn(conn, ses); |
21b75b01 BF |
1445 | ret = nfsd4_register_conn(conn); |
1446 | if (ret) | |
1447 | /* oops; xprt is already down: */ | |
1448 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
57a37144 BF |
1449 | /* We may have gained or lost a callback channel: */ |
1450 | nfsd4_probe_callback_sync(ses->se_client); | |
c7662518 | 1451 | } |
ec6b5d7b | 1452 | |
e1ff371f | 1453 | static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses) |
1d1bc8f2 BF |
1454 | { |
1455 | u32 dir = NFS4_CDFC4_FORE; | |
1456 | ||
e1ff371f | 1457 | if (cses->flags & SESSION4_BACK_CHAN) |
1d1bc8f2 | 1458 | dir |= NFS4_CDFC4_BACK; |
e1ff371f | 1459 | return alloc_conn(rqstp, dir); |
1d1bc8f2 BF |
1460 | } |
1461 | ||
1462 | /* must be called under client_lock */ | |
19cf5c02 | 1463 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 1464 | { |
19cf5c02 BF |
1465 | struct nfs4_client *clp = s->se_client; |
1466 | struct nfsd4_conn *c; | |
ec6b5d7b | 1467 | |
19cf5c02 BF |
1468 | spin_lock(&clp->cl_lock); |
1469 | while (!list_empty(&s->se_conns)) { | |
1470 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
1471 | list_del_init(&c->cn_persession); | |
1472 | spin_unlock(&clp->cl_lock); | |
557ce264 | 1473 | |
19cf5c02 BF |
1474 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
1475 | free_conn(c); | |
ec6b5d7b | 1476 | |
19cf5c02 BF |
1477 | spin_lock(&clp->cl_lock); |
1478 | } | |
1479 | spin_unlock(&clp->cl_lock); | |
c7662518 | 1480 | } |
ec6b5d7b | 1481 | |
1377b69e BF |
1482 | static void __free_session(struct nfsd4_session *ses) |
1483 | { | |
1377b69e BF |
1484 | free_session_slots(ses); |
1485 | kfree(ses); | |
1486 | } | |
1487 | ||
66b2b9b2 | 1488 | static void free_session(struct nfsd4_session *ses) |
c7662518 | 1489 | { |
19cf5c02 | 1490 | nfsd4_del_conns(ses); |
55c760cf | 1491 | nfsd4_put_drc_mem(&ses->se_fchannel); |
1377b69e | 1492 | __free_session(ses); |
c7662518 BF |
1493 | } |
1494 | ||
135ae827 | 1495 | static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
a827bcb2 | 1496 | { |
a827bcb2 | 1497 | int idx; |
1872de0e | 1498 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
a827bcb2 | 1499 | |
ec6b5d7b AA |
1500 | new->se_client = clp; |
1501 | gen_sessionid(new); | |
ec6b5d7b | 1502 | |
c7662518 BF |
1503 | INIT_LIST_HEAD(&new->se_conns); |
1504 | ||
ac7c46f2 | 1505 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 1506 | new->se_flags = cses->flags; |
8b5ce5cd | 1507 | new->se_cb_prog = cses->callback_prog; |
c6bb3ca2 | 1508 | new->se_cb_sec = cses->cb_sec; |
66b2b9b2 | 1509 | atomic_set(&new->se_ref, 0); |
5b6feee9 | 1510 | idx = hash_sessionid(&new->se_sessionid); |
1872de0e | 1511 | list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]); |
4c649378 | 1512 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 1513 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 1514 | spin_unlock(&clp->cl_lock); |
60810e54 | 1515 | |
b0d2e42c | 1516 | { |
edd76786 | 1517 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
1518 | /* |
1519 | * This is a little silly; with sessions there's no real | |
1520 | * use for the callback address. Use the peer address | |
1521 | * as a reasonable default for now, but consider fixing | |
1522 | * the rpc client not to require an address in the | |
1523 | * future: | |
1524 | */ | |
edd76786 BF |
1525 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
1526 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 1527 | } |
ec6b5d7b AA |
1528 | } |
1529 | ||
9089f1b4 | 1530 | /* caller must hold client_lock */ |
5282fd72 | 1531 | static struct nfsd4_session * |
d4e19e70 | 1532 | __find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net) |
5282fd72 ME |
1533 | { |
1534 | struct nfsd4_session *elem; | |
1535 | int idx; | |
1872de0e | 1536 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
5282fd72 | 1537 | |
0a880a28 TM |
1538 | lockdep_assert_held(&nn->client_lock); |
1539 | ||
5282fd72 ME |
1540 | dump_sessionid(__func__, sessionid); |
1541 | idx = hash_sessionid(sessionid); | |
5282fd72 | 1542 | /* Search in the appropriate list */ |
1872de0e | 1543 | list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) { |
5282fd72 ME |
1544 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
1545 | NFS4_MAX_SESSIONID_LEN)) { | |
1546 | return elem; | |
1547 | } | |
1548 | } | |
1549 | ||
1550 | dprintk("%s: session not found\n", __func__); | |
1551 | return NULL; | |
1552 | } | |
1553 | ||
d4e19e70 TM |
1554 | static struct nfsd4_session * |
1555 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net, | |
1556 | __be32 *ret) | |
1557 | { | |
1558 | struct nfsd4_session *session; | |
1559 | __be32 status = nfserr_badsession; | |
1560 | ||
1561 | session = __find_in_sessionid_hashtbl(sessionid, net); | |
1562 | if (!session) | |
1563 | goto out; | |
1564 | status = nfsd4_get_session_locked(session); | |
1565 | if (status) | |
1566 | session = NULL; | |
1567 | out: | |
1568 | *ret = status; | |
1569 | return session; | |
1570 | } | |
1571 | ||
9089f1b4 | 1572 | /* caller must hold client_lock */ |
7116ed6b | 1573 | static void |
5282fd72 | 1574 | unhash_session(struct nfsd4_session *ses) |
7116ed6b | 1575 | { |
0a880a28 TM |
1576 | struct nfs4_client *clp = ses->se_client; |
1577 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
1578 | ||
1579 | lockdep_assert_held(&nn->client_lock); | |
1580 | ||
7116ed6b | 1581 | list_del(&ses->se_hash); |
4c649378 | 1582 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 1583 | list_del(&ses->se_perclnt); |
4c649378 | 1584 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
1585 | } |
1586 | ||
1da177e4 LT |
1587 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
1588 | static int | |
2c142baa | 1589 | STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn) |
1da177e4 | 1590 | { |
bbc7f33a BF |
1591 | /* |
1592 | * We're assuming the clid was not given out from a boot | |
1593 | * precisely 2^32 (about 136 years) before this one. That seems | |
1594 | * a safe assumption: | |
1595 | */ | |
1596 | if (clid->cl_boot == (u32)nn->boot_time) | |
1da177e4 | 1597 | return 0; |
60adfc50 | 1598 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
2c142baa | 1599 | clid->cl_boot, clid->cl_id, nn->boot_time); |
1da177e4 LT |
1600 | return 1; |
1601 | } | |
1602 | ||
1603 | /* | |
1604 | * XXX Should we use a slab cache ? | |
1605 | * This type of memory management is somewhat inefficient, but we use it | |
1606 | * anyway since SETCLIENTID is not a common operation. | |
1607 | */ | |
35bba9a3 | 1608 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
1609 | { |
1610 | struct nfs4_client *clp; | |
d4f0489f | 1611 | int i; |
1da177e4 | 1612 | |
35bba9a3 BF |
1613 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
1614 | if (clp == NULL) | |
1615 | return NULL; | |
67114fe6 | 1616 | clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); |
d4f0489f TM |
1617 | if (clp->cl_name.data == NULL) |
1618 | goto err_no_name; | |
1619 | clp->cl_ownerstr_hashtbl = kmalloc(sizeof(struct list_head) * | |
1620 | OWNER_HASH_SIZE, GFP_KERNEL); | |
1621 | if (!clp->cl_ownerstr_hashtbl) | |
1622 | goto err_no_hashtbl; | |
1623 | for (i = 0; i < OWNER_HASH_SIZE; i++) | |
1624 | INIT_LIST_HEAD(&clp->cl_ownerstr_hashtbl[i]); | |
35bba9a3 | 1625 | clp->cl_name.len = name.len; |
5694c93e TM |
1626 | INIT_LIST_HEAD(&clp->cl_sessions); |
1627 | idr_init(&clp->cl_stateids); | |
1628 | atomic_set(&clp->cl_refcount, 0); | |
1629 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; | |
1630 | INIT_LIST_HEAD(&clp->cl_idhash); | |
1631 | INIT_LIST_HEAD(&clp->cl_openowners); | |
1632 | INIT_LIST_HEAD(&clp->cl_delegations); | |
1633 | INIT_LIST_HEAD(&clp->cl_lru); | |
5694c93e | 1634 | INIT_LIST_HEAD(&clp->cl_revoked); |
9cf514cc CH |
1635 | #ifdef CONFIG_NFSD_PNFS |
1636 | INIT_LIST_HEAD(&clp->cl_lo_states); | |
1637 | #endif | |
5694c93e TM |
1638 | spin_lock_init(&clp->cl_lock); |
1639 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1da177e4 | 1640 | return clp; |
d4f0489f TM |
1641 | err_no_hashtbl: |
1642 | kfree(clp->cl_name.data); | |
1643 | err_no_name: | |
1644 | kfree(clp); | |
1645 | return NULL; | |
1da177e4 LT |
1646 | } |
1647 | ||
4dd86e15 | 1648 | static void |
1da177e4 LT |
1649 | free_client(struct nfs4_client *clp) |
1650 | { | |
792c95dd BF |
1651 | while (!list_empty(&clp->cl_sessions)) { |
1652 | struct nfsd4_session *ses; | |
1653 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
1654 | se_perclnt); | |
1655 | list_del(&ses->se_perclnt); | |
66b2b9b2 BF |
1656 | WARN_ON_ONCE(atomic_read(&ses->se_ref)); |
1657 | free_session(ses); | |
792c95dd | 1658 | } |
4cb57e30 | 1659 | rpc_destroy_wait_queue(&clp->cl_cb_waitq); |
03a4e1f6 | 1660 | free_svc_cred(&clp->cl_cred); |
d4f0489f | 1661 | kfree(clp->cl_ownerstr_hashtbl); |
1da177e4 | 1662 | kfree(clp->cl_name.data); |
2d32b29a | 1663 | idr_destroy(&clp->cl_stateids); |
1da177e4 LT |
1664 | kfree(clp); |
1665 | } | |
1666 | ||
84d38ac9 | 1667 | /* must be called under the client_lock */ |
4beb345b | 1668 | static void |
84d38ac9 BH |
1669 | unhash_client_locked(struct nfs4_client *clp) |
1670 | { | |
4beb345b | 1671 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
792c95dd BF |
1672 | struct nfsd4_session *ses; |
1673 | ||
0a880a28 TM |
1674 | lockdep_assert_held(&nn->client_lock); |
1675 | ||
4beb345b TM |
1676 | /* Mark the client as expired! */ |
1677 | clp->cl_time = 0; | |
1678 | /* Make it invisible */ | |
1679 | if (!list_empty(&clp->cl_idhash)) { | |
1680 | list_del_init(&clp->cl_idhash); | |
1681 | if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) | |
1682 | rb_erase(&clp->cl_namenode, &nn->conf_name_tree); | |
1683 | else | |
1684 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); | |
1685 | } | |
1686 | list_del_init(&clp->cl_lru); | |
4c649378 | 1687 | spin_lock(&clp->cl_lock); |
792c95dd BF |
1688 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
1689 | list_del_init(&ses->se_hash); | |
4c649378 | 1690 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
1691 | } |
1692 | ||
1da177e4 | 1693 | static void |
4beb345b TM |
1694 | unhash_client(struct nfs4_client *clp) |
1695 | { | |
1696 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
1697 | ||
1698 | spin_lock(&nn->client_lock); | |
1699 | unhash_client_locked(clp); | |
1700 | spin_unlock(&nn->client_lock); | |
1701 | } | |
1702 | ||
97403d95 JL |
1703 | static __be32 mark_client_expired_locked(struct nfs4_client *clp) |
1704 | { | |
1705 | if (atomic_read(&clp->cl_refcount)) | |
1706 | return nfserr_jukebox; | |
1707 | unhash_client_locked(clp); | |
1708 | return nfs_ok; | |
1709 | } | |
1710 | ||
4beb345b TM |
1711 | static void |
1712 | __destroy_client(struct nfs4_client *clp) | |
1da177e4 | 1713 | { |
fe0750e5 | 1714 | struct nfs4_openowner *oo; |
1da177e4 | 1715 | struct nfs4_delegation *dp; |
1da177e4 LT |
1716 | struct list_head reaplist; |
1717 | ||
1da177e4 | 1718 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 1719 | spin_lock(&state_lock); |
ea1da636 N |
1720 | while (!list_empty(&clp->cl_delegations)) { |
1721 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
42690676 JL |
1722 | unhash_delegation_locked(dp); |
1723 | list_add(&dp->dl_recall_lru, &reaplist); | |
1da177e4 | 1724 | } |
cdc97505 | 1725 | spin_unlock(&state_lock); |
1da177e4 LT |
1726 | while (!list_empty(&reaplist)) { |
1727 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
42690676 | 1728 | list_del_init(&dp->dl_recall_lru); |
8287f009 | 1729 | put_clnt_odstate(dp->dl_clnt_odstate); |
afbda402 | 1730 | nfs4_put_deleg_lease(dp->dl_stid.sc_file); |
6011695d | 1731 | nfs4_put_stid(&dp->dl_stid); |
1da177e4 | 1732 | } |
2d4a532d | 1733 | while (!list_empty(&clp->cl_revoked)) { |
c876486b | 1734 | dp = list_entry(clp->cl_revoked.next, struct nfs4_delegation, dl_recall_lru); |
2d4a532d | 1735 | list_del_init(&dp->dl_recall_lru); |
6011695d | 1736 | nfs4_put_stid(&dp->dl_stid); |
956c4fee | 1737 | } |
ea1da636 | 1738 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 | 1739 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
b5971afa | 1740 | nfs4_get_stateowner(&oo->oo_owner); |
fe0750e5 | 1741 | release_openowner(oo); |
1da177e4 | 1742 | } |
9cf514cc | 1743 | nfsd4_return_all_client_layouts(clp); |
6ff8da08 | 1744 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
1745 | if (clp->cl_cb_conn.cb_xprt) |
1746 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
221a6876 | 1747 | free_client(clp); |
1da177e4 LT |
1748 | } |
1749 | ||
4beb345b TM |
1750 | static void |
1751 | destroy_client(struct nfs4_client *clp) | |
1752 | { | |
1753 | unhash_client(clp); | |
1754 | __destroy_client(clp); | |
1755 | } | |
1756 | ||
0d22f68f BF |
1757 | static void expire_client(struct nfs4_client *clp) |
1758 | { | |
4beb345b | 1759 | unhash_client(clp); |
0d22f68f | 1760 | nfsd4_client_record_remove(clp); |
4beb345b | 1761 | __destroy_client(clp); |
0d22f68f BF |
1762 | } |
1763 | ||
35bba9a3 BF |
1764 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
1765 | { | |
1766 | memcpy(target->cl_verifier.data, source->data, | |
1767 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
1768 | } |
1769 | ||
35bba9a3 BF |
1770 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
1771 | { | |
1da177e4 LT |
1772 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
1773 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
1774 | } | |
1775 | ||
03a4e1f6 | 1776 | static int copy_cred(struct svc_cred *target, struct svc_cred *source) |
35bba9a3 | 1777 | { |
03a4e1f6 BF |
1778 | if (source->cr_principal) { |
1779 | target->cr_principal = | |
1780 | kstrdup(source->cr_principal, GFP_KERNEL); | |
1781 | if (target->cr_principal == NULL) | |
1782 | return -ENOMEM; | |
1783 | } else | |
1784 | target->cr_principal = NULL; | |
d5497fc6 | 1785 | target->cr_flavor = source->cr_flavor; |
1da177e4 LT |
1786 | target->cr_uid = source->cr_uid; |
1787 | target->cr_gid = source->cr_gid; | |
1788 | target->cr_group_info = source->cr_group_info; | |
1789 | get_group_info(target->cr_group_info); | |
0dc1531a BF |
1790 | target->cr_gss_mech = source->cr_gss_mech; |
1791 | if (source->cr_gss_mech) | |
1792 | gss_mech_get(source->cr_gss_mech); | |
03a4e1f6 | 1793 | return 0; |
1da177e4 LT |
1794 | } |
1795 | ||
ef17af2a | 1796 | static int |
ac55fdc4 JL |
1797 | compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2) |
1798 | { | |
ef17af2a RV |
1799 | if (o1->len < o2->len) |
1800 | return -1; | |
1801 | if (o1->len > o2->len) | |
1802 | return 1; | |
1803 | return memcmp(o1->data, o2->data, o1->len); | |
ac55fdc4 JL |
1804 | } |
1805 | ||
35bba9a3 | 1806 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 1807 | { |
a55370a3 | 1808 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
1809 | } |
1810 | ||
1811 | static int | |
599e0a22 BF |
1812 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1813 | { | |
1814 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
1815 | } |
1816 | ||
1817 | static int | |
599e0a22 BF |
1818 | same_clid(clientid_t *cl1, clientid_t *cl2) |
1819 | { | |
1820 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1821 | } |
1822 | ||
8fbba96e BF |
1823 | static bool groups_equal(struct group_info *g1, struct group_info *g2) |
1824 | { | |
1825 | int i; | |
1826 | ||
1827 | if (g1->ngroups != g2->ngroups) | |
1828 | return false; | |
1829 | for (i=0; i<g1->ngroups; i++) | |
6fab8779 | 1830 | if (!gid_eq(GROUP_AT(g1, i), GROUP_AT(g2, i))) |
8fbba96e BF |
1831 | return false; |
1832 | return true; | |
1833 | } | |
1834 | ||
68eb3508 BF |
1835 | /* |
1836 | * RFC 3530 language requires clid_inuse be returned when the | |
1837 | * "principal" associated with a requests differs from that previously | |
1838 | * used. We use uid, gid's, and gss principal string as our best | |
1839 | * approximation. We also don't want to allow non-gss use of a client | |
1840 | * established using gss: in theory cr_principal should catch that | |
1841 | * change, but in practice cr_principal can be null even in the gss case | |
1842 | * since gssd doesn't always pass down a principal string. | |
1843 | */ | |
1844 | static bool is_gss_cred(struct svc_cred *cr) | |
1845 | { | |
1846 | /* Is cr_flavor one of the gss "pseudoflavors"?: */ | |
1847 | return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR); | |
1848 | } | |
1849 | ||
1850 | ||
5559b50a | 1851 | static bool |
599e0a22 BF |
1852 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
1853 | { | |
68eb3508 | 1854 | if ((is_gss_cred(cr1) != is_gss_cred(cr2)) |
6fab8779 EB |
1855 | || (!uid_eq(cr1->cr_uid, cr2->cr_uid)) |
1856 | || (!gid_eq(cr1->cr_gid, cr2->cr_gid)) | |
8fbba96e BF |
1857 | || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) |
1858 | return false; | |
1859 | if (cr1->cr_principal == cr2->cr_principal) | |
1860 | return true; | |
1861 | if (!cr1->cr_principal || !cr2->cr_principal) | |
1862 | return false; | |
5559b50a | 1863 | return 0 == strcmp(cr1->cr_principal, cr2->cr_principal); |
1da177e4 LT |
1864 | } |
1865 | ||
57266a6e BF |
1866 | static bool svc_rqst_integrity_protected(struct svc_rqst *rqstp) |
1867 | { | |
1868 | struct svc_cred *cr = &rqstp->rq_cred; | |
1869 | u32 service; | |
1870 | ||
c4720591 BF |
1871 | if (!cr->cr_gss_mech) |
1872 | return false; | |
57266a6e BF |
1873 | service = gss_pseudoflavor_to_service(cr->cr_gss_mech, cr->cr_flavor); |
1874 | return service == RPC_GSS_SVC_INTEGRITY || | |
1875 | service == RPC_GSS_SVC_PRIVACY; | |
1876 | } | |
1877 | ||
1878 | static bool mach_creds_match(struct nfs4_client *cl, struct svc_rqst *rqstp) | |
1879 | { | |
1880 | struct svc_cred *cr = &rqstp->rq_cred; | |
1881 | ||
1882 | if (!cl->cl_mach_cred) | |
1883 | return true; | |
1884 | if (cl->cl_cred.cr_gss_mech != cr->cr_gss_mech) | |
1885 | return false; | |
1886 | if (!svc_rqst_integrity_protected(rqstp)) | |
1887 | return false; | |
1888 | if (!cr->cr_principal) | |
1889 | return false; | |
1890 | return 0 == strcmp(cl->cl_cred.cr_principal, cr->cr_principal); | |
1891 | } | |
1892 | ||
294ac32e | 1893 | static void gen_confirm(struct nfs4_client *clp, struct nfsd_net *nn) |
deda2faa | 1894 | { |
ab4684d1 | 1895 | __be32 verf[2]; |
1da177e4 | 1896 | |
f419992c JL |
1897 | /* |
1898 | * This is opaque to client, so no need to byte-swap. Use | |
1899 | * __force to keep sparse happy | |
1900 | */ | |
1901 | verf[0] = (__force __be32)get_seconds(); | |
19311aa8 | 1902 | verf[1] = (__force __be32)nn->clverifier_counter++; |
ab4684d1 | 1903 | memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); |
1da177e4 LT |
1904 | } |
1905 | ||
294ac32e JL |
1906 | static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn) |
1907 | { | |
1908 | clp->cl_clientid.cl_boot = nn->boot_time; | |
1909 | clp->cl_clientid.cl_id = nn->clientid_counter++; | |
1910 | gen_confirm(clp, nn); | |
1911 | } | |
1912 | ||
4770d722 JL |
1913 | static struct nfs4_stid * |
1914 | find_stateid_locked(struct nfs4_client *cl, stateid_t *t) | |
4581d140 | 1915 | { |
3abdb607 BF |
1916 | struct nfs4_stid *ret; |
1917 | ||
1918 | ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id); | |
1919 | if (!ret || !ret->sc_type) | |
1920 | return NULL; | |
1921 | return ret; | |
4d71ab87 BF |
1922 | } |
1923 | ||
4770d722 JL |
1924 | static struct nfs4_stid * |
1925 | find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) | |
f459e453 BF |
1926 | { |
1927 | struct nfs4_stid *s; | |
4d71ab87 | 1928 | |
4770d722 JL |
1929 | spin_lock(&cl->cl_lock); |
1930 | s = find_stateid_locked(cl, t); | |
2d3f9668 TM |
1931 | if (s != NULL) { |
1932 | if (typemask & s->sc_type) | |
1933 | atomic_inc(&s->sc_count); | |
1934 | else | |
1935 | s = NULL; | |
1936 | } | |
4770d722 JL |
1937 | spin_unlock(&cl->cl_lock); |
1938 | return s; | |
4581d140 BF |
1939 | } |
1940 | ||
2216d449 | 1941 | static struct nfs4_client *create_client(struct xdr_netobj name, |
b09333c4 RL |
1942 | struct svc_rqst *rqstp, nfs4_verifier *verf) |
1943 | { | |
1944 | struct nfs4_client *clp; | |
1945 | struct sockaddr *sa = svc_addr(rqstp); | |
03a4e1f6 | 1946 | int ret; |
c212cecf | 1947 | struct net *net = SVC_NET(rqstp); |
b09333c4 RL |
1948 | |
1949 | clp = alloc_client(name); | |
1950 | if (clp == NULL) | |
1951 | return NULL; | |
1952 | ||
03a4e1f6 BF |
1953 | ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); |
1954 | if (ret) { | |
03a4e1f6 | 1955 | free_client(clp); |
03a4e1f6 | 1956 | return NULL; |
b09333c4 | 1957 | } |
0162ac2b | 1958 | nfsd4_init_cb(&clp->cl_cb_null, clp, NULL, NFSPROC4_CLNT_CB_NULL); |
07cd4909 | 1959 | clp->cl_time = get_seconds(); |
b09333c4 | 1960 | clear_bit(0, &clp->cl_cb_slot_busy); |
b09333c4 RL |
1961 | copy_verf(clp, verf); |
1962 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
edd76786 | 1963 | clp->cl_cb_session = NULL; |
c212cecf | 1964 | clp->net = net; |
b09333c4 RL |
1965 | return clp; |
1966 | } | |
1967 | ||
fd39ca9a | 1968 | static void |
ac55fdc4 JL |
1969 | add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root) |
1970 | { | |
1971 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
1972 | struct nfs4_client *clp; | |
1973 | ||
1974 | while (*new) { | |
1975 | clp = rb_entry(*new, struct nfs4_client, cl_namenode); | |
1976 | parent = *new; | |
1977 | ||
1978 | if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0) | |
1979 | new = &((*new)->rb_left); | |
1980 | else | |
1981 | new = &((*new)->rb_right); | |
1982 | } | |
1983 | ||
1984 | rb_link_node(&new_clp->cl_namenode, parent, new); | |
1985 | rb_insert_color(&new_clp->cl_namenode, root); | |
1986 | } | |
1987 | ||
1988 | static struct nfs4_client * | |
1989 | find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root) | |
1990 | { | |
ef17af2a | 1991 | int cmp; |
ac55fdc4 JL |
1992 | struct rb_node *node = root->rb_node; |
1993 | struct nfs4_client *clp; | |
1994 | ||
1995 | while (node) { | |
1996 | clp = rb_entry(node, struct nfs4_client, cl_namenode); | |
1997 | cmp = compare_blob(&clp->cl_name, name); | |
1998 | if (cmp > 0) | |
1999 | node = node->rb_left; | |
2000 | else if (cmp < 0) | |
2001 | node = node->rb_right; | |
2002 | else | |
2003 | return clp; | |
2004 | } | |
2005 | return NULL; | |
2006 | } | |
2007 | ||
2008 | static void | |
2009 | add_to_unconfirmed(struct nfs4_client *clp) | |
1da177e4 LT |
2010 | { |
2011 | unsigned int idhashval; | |
0a7ec377 | 2012 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 2013 | |
0a880a28 TM |
2014 | lockdep_assert_held(&nn->client_lock); |
2015 | ||
ac55fdc4 | 2016 | clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
a99454aa | 2017 | add_clp_to_name_tree(clp, &nn->unconf_name_tree); |
1da177e4 | 2018 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
0a7ec377 | 2019 | list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]); |
3dbacee6 | 2020 | renew_client_locked(clp); |
1da177e4 LT |
2021 | } |
2022 | ||
fd39ca9a | 2023 | static void |
1da177e4 LT |
2024 | move_to_confirmed(struct nfs4_client *clp) |
2025 | { | |
2026 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
8daae4dc | 2027 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 2028 | |
0a880a28 TM |
2029 | lockdep_assert_held(&nn->client_lock); |
2030 | ||
1da177e4 | 2031 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); |
8daae4dc | 2032 | list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]); |
a99454aa | 2033 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
382a62e7 | 2034 | add_clp_to_name_tree(clp, &nn->conf_name_tree); |
ac55fdc4 | 2035 | set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
3dbacee6 | 2036 | renew_client_locked(clp); |
1da177e4 LT |
2037 | } |
2038 | ||
2039 | static struct nfs4_client * | |
bfa85e83 | 2040 | find_client_in_id_table(struct list_head *tbl, clientid_t *clid, bool sessions) |
1da177e4 LT |
2041 | { |
2042 | struct nfs4_client *clp; | |
2043 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
2044 | ||
bfa85e83 | 2045 | list_for_each_entry(clp, &tbl[idhashval], cl_idhash) { |
a50d2ad1 | 2046 | if (same_clid(&clp->cl_clientid, clid)) { |
d15c077e BF |
2047 | if ((bool)clp->cl_minorversion != sessions) |
2048 | return NULL; | |
3dbacee6 | 2049 | renew_client_locked(clp); |
1da177e4 | 2050 | return clp; |
a50d2ad1 | 2051 | } |
1da177e4 LT |
2052 | } |
2053 | return NULL; | |
2054 | } | |
2055 | ||
bfa85e83 BF |
2056 | static struct nfs4_client * |
2057 | find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) | |
2058 | { | |
2059 | struct list_head *tbl = nn->conf_id_hashtbl; | |
2060 | ||
0a880a28 | 2061 | lockdep_assert_held(&nn->client_lock); |
bfa85e83 BF |
2062 | return find_client_in_id_table(tbl, clid, sessions); |
2063 | } | |
2064 | ||
1da177e4 | 2065 | static struct nfs4_client * |
0a7ec377 | 2066 | find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
1da177e4 | 2067 | { |
bfa85e83 | 2068 | struct list_head *tbl = nn->unconf_id_hashtbl; |
1da177e4 | 2069 | |
0a880a28 | 2070 | lockdep_assert_held(&nn->client_lock); |
bfa85e83 | 2071 | return find_client_in_id_table(tbl, clid, sessions); |
1da177e4 LT |
2072 | } |
2073 | ||
6e5f15c9 | 2074 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 2075 | { |
6e5f15c9 | 2076 | return clp->cl_exchange_flags != 0; |
e203d506 | 2077 | } |
a1bcecd2 | 2078 | |
28ce6054 | 2079 | static struct nfs4_client * |
382a62e7 | 2080 | find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 2081 | { |
0a880a28 | 2082 | lockdep_assert_held(&nn->client_lock); |
382a62e7 | 2083 | return find_clp_in_name_tree(name, &nn->conf_name_tree); |
28ce6054 N |
2084 | } |
2085 | ||
2086 | static struct nfs4_client * | |
a99454aa | 2087 | find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 2088 | { |
0a880a28 | 2089 | lockdep_assert_held(&nn->client_lock); |
a99454aa | 2090 | return find_clp_in_name_tree(name, &nn->unconf_name_tree); |
28ce6054 N |
2091 | } |
2092 | ||
fd39ca9a | 2093 | static void |
6f3d772f | 2094 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 2095 | { |
07263f1e | 2096 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
2097 | struct sockaddr *sa = svc_addr(rqstp); |
2098 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
2099 | unsigned short expected_family; |
2100 | ||
2101 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
2102 | if (se->se_callback_netid_len == 3 && | |
2103 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
2104 | expected_family = AF_INET; | |
2105 | else if (se->se_callback_netid_len == 4 && | |
2106 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
2107 | expected_family = AF_INET6; | |
2108 | else | |
1da177e4 LT |
2109 | goto out_err; |
2110 | ||
c212cecf | 2111 | conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val, |
aa9a4ec7 | 2112 | se->se_callback_addr_len, |
07263f1e BF |
2113 | (struct sockaddr *)&conn->cb_addr, |
2114 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 2115 | |
07263f1e | 2116 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 2117 | goto out_err; |
aa9a4ec7 | 2118 | |
07263f1e BF |
2119 | if (conn->cb_addr.ss_family == AF_INET6) |
2120 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 2121 | |
07263f1e BF |
2122 | conn->cb_prog = se->se_callback_prog; |
2123 | conn->cb_ident = se->se_callback_ident; | |
849a1cf1 | 2124 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
1da177e4 LT |
2125 | return; |
2126 | out_err: | |
07263f1e BF |
2127 | conn->cb_addr.ss_family = AF_UNSPEC; |
2128 | conn->cb_addrlen = 0; | |
849823c5 | 2129 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
2130 | "will not receive delegations\n", |
2131 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
2132 | ||
1da177e4 LT |
2133 | return; |
2134 | } | |
2135 | ||
074fe897 | 2136 | /* |
067e1ace | 2137 | * Cache a reply. nfsd4_check_resp_size() has bounded the cache size. |
074fe897 | 2138 | */ |
b607664e | 2139 | static void |
074fe897 | 2140 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) |
074fe897 | 2141 | { |
f5236013 | 2142 | struct xdr_buf *buf = resp->xdr.buf; |
557ce264 AA |
2143 | struct nfsd4_slot *slot = resp->cstate.slot; |
2144 | unsigned int base; | |
074fe897 | 2145 | |
557ce264 | 2146 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 2147 | |
557ce264 AA |
2148 | slot->sl_opcnt = resp->opcnt; |
2149 | slot->sl_status = resp->cstate.status; | |
074fe897 | 2150 | |
bf5c43c8 | 2151 | slot->sl_flags |= NFSD4_SLOT_INITIALIZED; |
bf864a31 | 2152 | if (nfsd4_not_cached(resp)) { |
557ce264 | 2153 | slot->sl_datalen = 0; |
bf864a31 | 2154 | return; |
074fe897 | 2155 | } |
f5236013 BF |
2156 | base = resp->cstate.data_offset; |
2157 | slot->sl_datalen = buf->len - base; | |
2158 | if (read_bytes_from_xdr_buf(buf, base, slot->sl_data, slot->sl_datalen)) | |
557ce264 AA |
2159 | WARN("%s: sessions DRC could not cache compound\n", __func__); |
2160 | return; | |
074fe897 AA |
2161 | } |
2162 | ||
2163 | /* | |
abfabf8c AA |
2164 | * Encode the replay sequence operation from the slot values. |
2165 | * If cachethis is FALSE encode the uncached rep error on the next | |
2166 | * operation which sets resp->p and increments resp->opcnt for | |
2167 | * nfs4svc_encode_compoundres. | |
074fe897 | 2168 | * |
074fe897 | 2169 | */ |
abfabf8c AA |
2170 | static __be32 |
2171 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
2172 | struct nfsd4_compoundres *resp) | |
074fe897 | 2173 | { |
abfabf8c AA |
2174 | struct nfsd4_op *op; |
2175 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 2176 | |
abfabf8c AA |
2177 | /* Encode the replayed sequence operation */ |
2178 | op = &args->ops[resp->opcnt - 1]; | |
2179 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 2180 | |
abfabf8c | 2181 | /* Return nfserr_retry_uncached_rep in next operation. */ |
73e79482 | 2182 | if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) { |
abfabf8c AA |
2183 | op = &args->ops[resp->opcnt++]; |
2184 | op->status = nfserr_retry_uncached_rep; | |
2185 | nfsd4_encode_operation(resp, op); | |
074fe897 | 2186 | } |
abfabf8c | 2187 | return op->status; |
074fe897 AA |
2188 | } |
2189 | ||
2190 | /* | |
557ce264 AA |
2191 | * The sequence operation is not cached because we can use the slot and |
2192 | * session values. | |
074fe897 | 2193 | */ |
3ca2eb98 | 2194 | static __be32 |
bf864a31 AA |
2195 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
2196 | struct nfsd4_sequence *seq) | |
074fe897 | 2197 | { |
557ce264 | 2198 | struct nfsd4_slot *slot = resp->cstate.slot; |
f5236013 BF |
2199 | struct xdr_stream *xdr = &resp->xdr; |
2200 | __be32 *p; | |
074fe897 AA |
2201 | __be32 status; |
2202 | ||
557ce264 | 2203 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 2204 | |
abfabf8c | 2205 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); |
0da7b19c | 2206 | if (status) |
abfabf8c | 2207 | return status; |
074fe897 | 2208 | |
f5236013 BF |
2209 | p = xdr_reserve_space(xdr, slot->sl_datalen); |
2210 | if (!p) { | |
2211 | WARN_ON_ONCE(1); | |
2212 | return nfserr_serverfault; | |
2213 | } | |
2214 | xdr_encode_opaque_fixed(p, slot->sl_data, slot->sl_datalen); | |
2215 | xdr_commit_encode(xdr); | |
074fe897 | 2216 | |
557ce264 | 2217 | resp->opcnt = slot->sl_opcnt; |
f5236013 | 2218 | return slot->sl_status; |
074fe897 AA |
2219 | } |
2220 | ||
0733d213 AA |
2221 | /* |
2222 | * Set the exchange_id flags returned by the server. | |
2223 | */ | |
2224 | static void | |
2225 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
2226 | { | |
9cf514cc CH |
2227 | #ifdef CONFIG_NFSD_PNFS |
2228 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_PNFS_MDS; | |
2229 | #else | |
0733d213 | 2230 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; |
9cf514cc | 2231 | #endif |
0733d213 AA |
2232 | |
2233 | /* Referrals are supported, Migration is not. */ | |
2234 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
2235 | ||
2236 | /* set the wire flags to return to client. */ | |
2237 | clid->flags = new->cl_exchange_flags; | |
2238 | } | |
2239 | ||
631fc9ea BF |
2240 | static bool client_has_state(struct nfs4_client *clp) |
2241 | { | |
2242 | /* | |
2243 | * Note clp->cl_openowners check isn't quite right: there's no | |
2244 | * need to count owners without stateid's. | |
2245 | * | |
2246 | * Also note we should probably be using this in 4.0 case too. | |
2247 | */ | |
6eccece9 | 2248 | return !list_empty(&clp->cl_openowners) |
47e970be KM |
2249 | #ifdef CONFIG_NFSD_PNFS |
2250 | || !list_empty(&clp->cl_lo_states) | |
2251 | #endif | |
6eccece9 BF |
2252 | || !list_empty(&clp->cl_delegations) |
2253 | || !list_empty(&clp->cl_sessions); | |
631fc9ea BF |
2254 | } |
2255 | ||
069b6ad4 AA |
2256 | __be32 |
2257 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
2258 | struct nfsd4_compound_state *cstate, | |
2259 | struct nfsd4_exchange_id *exid) | |
2260 | { | |
3dbacee6 TM |
2261 | struct nfs4_client *conf, *new; |
2262 | struct nfs4_client *unconf = NULL; | |
57b7b43b | 2263 | __be32 status; |
363168b4 | 2264 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 2265 | nfs4_verifier verf = exid->verifier; |
363168b4 | 2266 | struct sockaddr *sa = svc_addr(rqstp); |
83e08fd4 | 2267 | bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; |
c212cecf | 2268 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
0733d213 | 2269 | |
363168b4 | 2270 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 2271 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 2272 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 2273 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 2274 | addr_str, exid->flags, exid->spa_how); |
0733d213 | 2275 | |
a084daf5 | 2276 | if (exid->flags & ~EXCHGID4_FLAG_MASK_A) |
0733d213 AA |
2277 | return nfserr_inval; |
2278 | ||
0733d213 | 2279 | switch (exid->spa_how) { |
57266a6e BF |
2280 | case SP4_MACH_CRED: |
2281 | if (!svc_rqst_integrity_protected(rqstp)) | |
2282 | return nfserr_inval; | |
0733d213 AA |
2283 | case SP4_NONE: |
2284 | break; | |
063b0fb9 BF |
2285 | default: /* checked by xdr code */ |
2286 | WARN_ON_ONCE(1); | |
0733d213 | 2287 | case SP4_SSV: |
dd30333c | 2288 | return nfserr_encr_alg_unsupp; |
0733d213 AA |
2289 | } |
2290 | ||
5cc40fd7 TM |
2291 | new = create_client(exid->clname, rqstp, &verf); |
2292 | if (new == NULL) | |
2293 | return nfserr_jukebox; | |
2294 | ||
2dbb269d | 2295 | /* Cases below refer to rfc 5661 section 18.35.4: */ |
3dbacee6 | 2296 | spin_lock(&nn->client_lock); |
382a62e7 | 2297 | conf = find_confirmed_client_by_name(&exid->clname, nn); |
0733d213 | 2298 | if (conf) { |
83e08fd4 BF |
2299 | bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); |
2300 | bool verfs_match = same_verf(&verf, &conf->cl_verifier); | |
2301 | ||
136e658d BF |
2302 | if (update) { |
2303 | if (!clp_used_exchangeid(conf)) { /* buggy client */ | |
2dbb269d | 2304 | status = nfserr_inval; |
1a308118 BF |
2305 | goto out; |
2306 | } | |
57266a6e BF |
2307 | if (!mach_creds_match(conf, rqstp)) { |
2308 | status = nfserr_wrong_cred; | |
2309 | goto out; | |
2310 | } | |
136e658d | 2311 | if (!creds_match) { /* case 9 */ |
ea236d07 | 2312 | status = nfserr_perm; |
136e658d BF |
2313 | goto out; |
2314 | } | |
2315 | if (!verfs_match) { /* case 8 */ | |
0733d213 AA |
2316 | status = nfserr_not_same; |
2317 | goto out; | |
2318 | } | |
136e658d BF |
2319 | /* case 6 */ |
2320 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
136e658d | 2321 | goto out_copy; |
0733d213 | 2322 | } |
136e658d | 2323 | if (!creds_match) { /* case 3 */ |
631fc9ea BF |
2324 | if (client_has_state(conf)) { |
2325 | status = nfserr_clid_inuse; | |
0733d213 AA |
2326 | goto out; |
2327 | } | |
0733d213 AA |
2328 | goto out_new; |
2329 | } | |
136e658d | 2330 | if (verfs_match) { /* case 2 */ |
0f1ba0ef | 2331 | conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; |
136e658d BF |
2332 | goto out_copy; |
2333 | } | |
2334 | /* case 5, client reboot */ | |
3dbacee6 | 2335 | conf = NULL; |
136e658d | 2336 | goto out_new; |
6ddbbbfe MS |
2337 | } |
2338 | ||
2dbb269d | 2339 | if (update) { /* case 7 */ |
6ddbbbfe MS |
2340 | status = nfserr_noent; |
2341 | goto out; | |
0733d213 AA |
2342 | } |
2343 | ||
a99454aa | 2344 | unconf = find_unconfirmed_client_by_name(&exid->clname, nn); |
2dbb269d | 2345 | if (unconf) /* case 4, possible retry or client restart */ |
3dbacee6 | 2346 | unhash_client_locked(unconf); |
0733d213 | 2347 | |
2dbb269d | 2348 | /* case 1 (normal case) */ |
0733d213 | 2349 | out_new: |
fd699b8a JL |
2350 | if (conf) { |
2351 | status = mark_client_expired_locked(conf); | |
2352 | if (status) | |
2353 | goto out; | |
2354 | } | |
4f540e29 | 2355 | new->cl_minorversion = cstate->minorversion; |
57266a6e | 2356 | new->cl_mach_cred = (exid->spa_how == SP4_MACH_CRED); |
0733d213 | 2357 | |
c212cecf | 2358 | gen_clid(new, nn); |
ac55fdc4 | 2359 | add_to_unconfirmed(new); |
3dbacee6 | 2360 | swap(new, conf); |
0733d213 | 2361 | out_copy: |
5cc40fd7 TM |
2362 | exid->clientid.cl_boot = conf->cl_clientid.cl_boot; |
2363 | exid->clientid.cl_id = conf->cl_clientid.cl_id; | |
0733d213 | 2364 | |
5cc40fd7 TM |
2365 | exid->seqid = conf->cl_cs_slot.sl_seqid + 1; |
2366 | nfsd4_set_ex_flags(conf, exid); | |
0733d213 AA |
2367 | |
2368 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
5cc40fd7 | 2369 | conf->cl_cs_slot.sl_seqid, conf->cl_exchange_flags); |
0733d213 AA |
2370 | status = nfs_ok; |
2371 | ||
2372 | out: | |
3dbacee6 | 2373 | spin_unlock(&nn->client_lock); |
5cc40fd7 | 2374 | if (new) |
3dbacee6 TM |
2375 | expire_client(new); |
2376 | if (unconf) | |
2377 | expire_client(unconf); | |
0733d213 | 2378 | return status; |
069b6ad4 AA |
2379 | } |
2380 | ||
57b7b43b | 2381 | static __be32 |
88e588d5 | 2382 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 2383 | { |
88e588d5 AA |
2384 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
2385 | slot_seqid); | |
b85d4c01 BH |
2386 | |
2387 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
2388 | if (slot_inuse) { |
2389 | if (seqid == slot_seqid) | |
b85d4c01 BH |
2390 | return nfserr_jukebox; |
2391 | else | |
2392 | return nfserr_seq_misordered; | |
2393 | } | |
f6d82485 | 2394 | /* Note unsigned 32-bit arithmetic handles wraparound: */ |
88e588d5 | 2395 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 | 2396 | return nfs_ok; |
88e588d5 | 2397 | if (seqid == slot_seqid) |
b85d4c01 | 2398 | return nfserr_replay_cache; |
b85d4c01 BH |
2399 | return nfserr_seq_misordered; |
2400 | } | |
2401 | ||
49557cc7 AA |
2402 | /* |
2403 | * Cache the create session result into the create session single DRC | |
2404 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
2405 | * Do this for solo or embedded create session operations. | |
2406 | */ | |
2407 | static void | |
2408 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
57b7b43b | 2409 | struct nfsd4_clid_slot *slot, __be32 nfserr) |
49557cc7 AA |
2410 | { |
2411 | slot->sl_status = nfserr; | |
2412 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
2413 | } | |
2414 | ||
2415 | static __be32 | |
2416 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
2417 | struct nfsd4_clid_slot *slot) | |
2418 | { | |
2419 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
2420 | return slot->sl_status; | |
2421 | } | |
2422 | ||
1b74c25b MJ |
2423 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
2424 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
2425 | 1 + /* MIN tag is length with zero, only length */ \ | |
2426 | 3 + /* version, opcount, opcode */ \ | |
2427 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
2428 | /* seqid, slotID, slotID, cache */ \ | |
2429 | 4 ) * sizeof(__be32)) | |
2430 | ||
2431 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
2432 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
2433 | 1 + /* status */ \ | |
2434 | 1 + /* MIN tag is length with zero, only length */ \ | |
2435 | 3 + /* opcount, opcode, opstatus*/ \ | |
2436 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
2437 | /* seqid, slotID, slotID, slotID, status */ \ | |
2438 | 5 ) * sizeof(__be32)) | |
2439 | ||
55c760cf | 2440 | static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs *ca, struct nfsd_net *nn) |
1b74c25b | 2441 | { |
55c760cf BF |
2442 | u32 maxrpc = nn->nfsd_serv->sv_max_mesg; |
2443 | ||
373cd409 BF |
2444 | if (ca->maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ) |
2445 | return nfserr_toosmall; | |
2446 | if (ca->maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ) | |
2447 | return nfserr_toosmall; | |
55c760cf BF |
2448 | ca->headerpadsz = 0; |
2449 | ca->maxreq_sz = min_t(u32, ca->maxreq_sz, maxrpc); | |
2450 | ca->maxresp_sz = min_t(u32, ca->maxresp_sz, maxrpc); | |
2451 | ca->maxops = min_t(u32, ca->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
2452 | ca->maxresp_cached = min_t(u32, ca->maxresp_cached, | |
2453 | NFSD_SLOT_CACHE_SIZE + NFSD_MIN_HDR_SEQ_SZ); | |
2454 | ca->maxreqs = min_t(u32, ca->maxreqs, NFSD_MAX_SLOTS_PER_SESSION); | |
2455 | /* | |
2456 | * Note decreasing slot size below client's request may make it | |
2457 | * difficult for client to function correctly, whereas | |
2458 | * decreasing the number of slots will (just?) affect | |
2459 | * performance. When short on memory we therefore prefer to | |
2460 | * decrease number of slots instead of their size. Clients that | |
2461 | * request larger slots than they need will get poor results: | |
2462 | */ | |
2463 | ca->maxreqs = nfsd4_get_drc_mem(ca); | |
2464 | if (!ca->maxreqs) | |
2465 | return nfserr_jukebox; | |
2466 | ||
373cd409 | 2467 | return nfs_ok; |
1b74c25b MJ |
2468 | } |
2469 | ||
8a891633 KM |
2470 | #define NFSD_CB_MAX_REQ_SZ ((NFS4_enc_cb_recall_sz + \ |
2471 | RPC_MAX_HEADER_WITH_AUTH) * sizeof(__be32)) | |
2472 | #define NFSD_CB_MAX_RESP_SZ ((NFS4_dec_cb_recall_sz + \ | |
2473 | RPC_MAX_REPHEADER_WITH_AUTH) * sizeof(__be32)) | |
2474 | ||
06b332a5 | 2475 | static __be32 check_backchannel_attrs(struct nfsd4_channel_attrs *ca) |
1b74c25b | 2476 | { |
06b332a5 BF |
2477 | ca->headerpadsz = 0; |
2478 | ||
2479 | /* | |
2480 | * These RPC_MAX_HEADER macros are overkill, especially since we | |
2481 | * don't even do gss on the backchannel yet. But this is still | |
2482 | * less than 1k. Tighten up this estimate in the unlikely event | |
2483 | * it turns out to be a problem for some client: | |
2484 | */ | |
8a891633 | 2485 | if (ca->maxreq_sz < NFSD_CB_MAX_REQ_SZ) |
06b332a5 | 2486 | return nfserr_toosmall; |
8a891633 | 2487 | if (ca->maxresp_sz < NFSD_CB_MAX_RESP_SZ) |
06b332a5 BF |
2488 | return nfserr_toosmall; |
2489 | ca->maxresp_cached = 0; | |
2490 | if (ca->maxops < 2) | |
2491 | return nfserr_toosmall; | |
2492 | ||
2493 | return nfs_ok; | |
1b74c25b MJ |
2494 | } |
2495 | ||
b78724b7 BF |
2496 | static __be32 nfsd4_check_cb_sec(struct nfsd4_cb_sec *cbs) |
2497 | { | |
2498 | switch (cbs->flavor) { | |
2499 | case RPC_AUTH_NULL: | |
2500 | case RPC_AUTH_UNIX: | |
2501 | return nfs_ok; | |
2502 | default: | |
2503 | /* | |
2504 | * GSS case: the spec doesn't allow us to return this | |
2505 | * error. But it also doesn't allow us not to support | |
2506 | * GSS. | |
2507 | * I'd rather this fail hard than return some error the | |
2508 | * client might think it can already handle: | |
2509 | */ | |
2510 | return nfserr_encr_alg_unsupp; | |
2511 | } | |
2512 | } | |
2513 | ||
069b6ad4 AA |
2514 | __be32 |
2515 | nfsd4_create_session(struct svc_rqst *rqstp, | |
2516 | struct nfsd4_compound_state *cstate, | |
2517 | struct nfsd4_create_session *cr_ses) | |
2518 | { | |
363168b4 | 2519 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 2520 | struct nfs4_client *conf, *unconf; |
d20c11d8 | 2521 | struct nfs4_client *old = NULL; |
ac7c46f2 | 2522 | struct nfsd4_session *new; |
81f0b2a4 | 2523 | struct nfsd4_conn *conn; |
49557cc7 | 2524 | struct nfsd4_clid_slot *cs_slot = NULL; |
57b7b43b | 2525 | __be32 status = 0; |
8daae4dc | 2526 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
ec6b5d7b | 2527 | |
a62573dc MJ |
2528 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
2529 | return nfserr_inval; | |
b78724b7 BF |
2530 | status = nfsd4_check_cb_sec(&cr_ses->cb_sec); |
2531 | if (status) | |
2532 | return status; | |
55c760cf | 2533 | status = check_forechannel_attrs(&cr_ses->fore_channel, nn); |
06b332a5 BF |
2534 | if (status) |
2535 | return status; | |
2536 | status = check_backchannel_attrs(&cr_ses->back_channel); | |
373cd409 | 2537 | if (status) |
f403e450 | 2538 | goto out_release_drc_mem; |
81f0b2a4 | 2539 | status = nfserr_jukebox; |
60810e54 | 2540 | new = alloc_session(&cr_ses->fore_channel, &cr_ses->back_channel); |
55c760cf BF |
2541 | if (!new) |
2542 | goto out_release_drc_mem; | |
81f0b2a4 BF |
2543 | conn = alloc_conn_from_crses(rqstp, cr_ses); |
2544 | if (!conn) | |
2545 | goto out_free_session; | |
a62573dc | 2546 | |
d20c11d8 | 2547 | spin_lock(&nn->client_lock); |
0a7ec377 | 2548 | unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn); |
8daae4dc | 2549 | conf = find_confirmed_client(&cr_ses->clientid, true, nn); |
78389046 | 2550 | WARN_ON_ONCE(conf && unconf); |
ec6b5d7b AA |
2551 | |
2552 | if (conf) { | |
57266a6e BF |
2553 | status = nfserr_wrong_cred; |
2554 | if (!mach_creds_match(conf, rqstp)) | |
2555 | goto out_free_conn; | |
49557cc7 AA |
2556 | cs_slot = &conf->cl_cs_slot; |
2557 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
f5e22bb6 KM |
2558 | if (status) { |
2559 | if (status == nfserr_replay_cache) | |
2560 | status = nfsd4_replay_create_session(cr_ses, cs_slot); | |
81f0b2a4 | 2561 | goto out_free_conn; |
ec6b5d7b | 2562 | } |
ec6b5d7b AA |
2563 | } else if (unconf) { |
2564 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || | |
363168b4 | 2565 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b | 2566 | status = nfserr_clid_inuse; |
81f0b2a4 | 2567 | goto out_free_conn; |
ec6b5d7b | 2568 | } |
57266a6e BF |
2569 | status = nfserr_wrong_cred; |
2570 | if (!mach_creds_match(unconf, rqstp)) | |
2571 | goto out_free_conn; | |
49557cc7 AA |
2572 | cs_slot = &unconf->cl_cs_slot; |
2573 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
2574 | if (status) { |
2575 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 2576 | status = nfserr_seq_misordered; |
81f0b2a4 | 2577 | goto out_free_conn; |
ec6b5d7b | 2578 | } |
382a62e7 | 2579 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
221a6876 | 2580 | if (old) { |
d20c11d8 | 2581 | status = mark_client_expired_locked(old); |
7abea1e8 JL |
2582 | if (status) { |
2583 | old = NULL; | |
221a6876 | 2584 | goto out_free_conn; |
7abea1e8 | 2585 | } |
221a6876 | 2586 | } |
8f9d3d3b | 2587 | move_to_confirmed(unconf); |
ec6b5d7b AA |
2588 | conf = unconf; |
2589 | } else { | |
2590 | status = nfserr_stale_clientid; | |
81f0b2a4 | 2591 | goto out_free_conn; |
ec6b5d7b | 2592 | } |
81f0b2a4 | 2593 | status = nfs_ok; |
408b79bc BF |
2594 | /* |
2595 | * We do not support RDMA or persistent sessions | |
2596 | */ | |
2597 | cr_ses->flags &= ~SESSION4_PERSIST; | |
2598 | cr_ses->flags &= ~SESSION4_RDMA; | |
2599 | ||
81f0b2a4 | 2600 | init_session(rqstp, new, conf, cr_ses); |
d20c11d8 | 2601 | nfsd4_get_session_locked(new); |
81f0b2a4 | 2602 | |
ac7c46f2 | 2603 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, |
ec6b5d7b | 2604 | NFS4_MAX_SESSIONID_LEN); |
86c3e16c | 2605 | cs_slot->sl_seqid++; |
49557cc7 | 2606 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 2607 | |
d20c11d8 | 2608 | /* cache solo and embedded create sessions under the client_lock */ |
49557cc7 | 2609 | nfsd4_cache_create_session(cr_ses, cs_slot, status); |
d20c11d8 JL |
2610 | spin_unlock(&nn->client_lock); |
2611 | /* init connection and backchannel */ | |
2612 | nfsd4_init_conn(rqstp, conn, new); | |
2613 | nfsd4_put_session(new); | |
d20c11d8 JL |
2614 | if (old) |
2615 | expire_client(old); | |
ec6b5d7b | 2616 | return status; |
81f0b2a4 | 2617 | out_free_conn: |
d20c11d8 | 2618 | spin_unlock(&nn->client_lock); |
81f0b2a4 | 2619 | free_conn(conn); |
d20c11d8 JL |
2620 | if (old) |
2621 | expire_client(old); | |
81f0b2a4 BF |
2622 | out_free_session: |
2623 | __free_session(new); | |
55c760cf BF |
2624 | out_release_drc_mem: |
2625 | nfsd4_put_drc_mem(&cr_ses->fore_channel); | |
1ca50792 | 2626 | return status; |
069b6ad4 AA |
2627 | } |
2628 | ||
1d1bc8f2 BF |
2629 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
2630 | { | |
2631 | switch (*dir) { | |
2632 | case NFS4_CDFC4_FORE: | |
2633 | case NFS4_CDFC4_BACK: | |
2634 | return nfs_ok; | |
2635 | case NFS4_CDFC4_FORE_OR_BOTH: | |
2636 | case NFS4_CDFC4_BACK_OR_BOTH: | |
2637 | *dir = NFS4_CDFC4_BOTH; | |
2638 | return nfs_ok; | |
2639 | }; | |
2640 | return nfserr_inval; | |
2641 | } | |
2642 | ||
cb73a9f4 BF |
2643 | __be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_backchannel_ctl *bc) |
2644 | { | |
2645 | struct nfsd4_session *session = cstate->session; | |
c9a49628 | 2646 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
b78724b7 | 2647 | __be32 status; |
cb73a9f4 | 2648 | |
b78724b7 BF |
2649 | status = nfsd4_check_cb_sec(&bc->bc_cb_sec); |
2650 | if (status) | |
2651 | return status; | |
c9a49628 | 2652 | spin_lock(&nn->client_lock); |
cb73a9f4 BF |
2653 | session->se_cb_prog = bc->bc_cb_program; |
2654 | session->se_cb_sec = bc->bc_cb_sec; | |
c9a49628 | 2655 | spin_unlock(&nn->client_lock); |
cb73a9f4 BF |
2656 | |
2657 | nfsd4_probe_callback(session->se_client); | |
2658 | ||
2659 | return nfs_ok; | |
2660 | } | |
2661 | ||
1d1bc8f2 BF |
2662 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, |
2663 | struct nfsd4_compound_state *cstate, | |
2664 | struct nfsd4_bind_conn_to_session *bcts) | |
2665 | { | |
2666 | __be32 status; | |
3ba63671 | 2667 | struct nfsd4_conn *conn; |
4f6e6c17 | 2668 | struct nfsd4_session *session; |
d4e19e70 TM |
2669 | struct net *net = SVC_NET(rqstp); |
2670 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1d1bc8f2 BF |
2671 | |
2672 | if (!nfsd4_last_compound_op(rqstp)) | |
2673 | return nfserr_not_only_op; | |
c9a49628 | 2674 | spin_lock(&nn->client_lock); |
d4e19e70 | 2675 | session = find_in_sessionid_hashtbl(&bcts->sessionid, net, &status); |
c9a49628 | 2676 | spin_unlock(&nn->client_lock); |
4f6e6c17 | 2677 | if (!session) |
d4e19e70 | 2678 | goto out_no_session; |
57266a6e BF |
2679 | status = nfserr_wrong_cred; |
2680 | if (!mach_creds_match(session->se_client, rqstp)) | |
2681 | goto out; | |
1d1bc8f2 | 2682 | status = nfsd4_map_bcts_dir(&bcts->dir); |
3ba63671 | 2683 | if (status) |
4f6e6c17 | 2684 | goto out; |
3ba63671 | 2685 | conn = alloc_conn(rqstp, bcts->dir); |
4f6e6c17 | 2686 | status = nfserr_jukebox; |
3ba63671 | 2687 | if (!conn) |
4f6e6c17 BF |
2688 | goto out; |
2689 | nfsd4_init_conn(rqstp, conn, session); | |
2690 | status = nfs_ok; | |
2691 | out: | |
d4e19e70 TM |
2692 | nfsd4_put_session(session); |
2693 | out_no_session: | |
4f6e6c17 | 2694 | return status; |
1d1bc8f2 BF |
2695 | } |
2696 | ||
5d4cec2f BF |
2697 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
2698 | { | |
2699 | if (!session) | |
2700 | return 0; | |
2701 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
2702 | } | |
2703 | ||
069b6ad4 AA |
2704 | __be32 |
2705 | nfsd4_destroy_session(struct svc_rqst *r, | |
2706 | struct nfsd4_compound_state *cstate, | |
2707 | struct nfsd4_destroy_session *sessionid) | |
2708 | { | |
e10e0cfc | 2709 | struct nfsd4_session *ses; |
abcdff09 | 2710 | __be32 status; |
f0f51f5c | 2711 | int ref_held_by_me = 0; |
d4e19e70 TM |
2712 | struct net *net = SVC_NET(r); |
2713 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
e10e0cfc | 2714 | |
abcdff09 | 2715 | status = nfserr_not_only_op; |
5d4cec2f | 2716 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 | 2717 | if (!nfsd4_last_compound_op(r)) |
abcdff09 | 2718 | goto out; |
f0f51f5c | 2719 | ref_held_by_me++; |
57716355 | 2720 | } |
e10e0cfc | 2721 | dump_sessionid(__func__, &sessionid->sessionid); |
c9a49628 | 2722 | spin_lock(&nn->client_lock); |
d4e19e70 | 2723 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid, net, &status); |
abcdff09 BF |
2724 | if (!ses) |
2725 | goto out_client_lock; | |
57266a6e BF |
2726 | status = nfserr_wrong_cred; |
2727 | if (!mach_creds_match(ses->se_client, r)) | |
d4e19e70 | 2728 | goto out_put_session; |
f0f51f5c | 2729 | status = mark_session_dead_locked(ses, 1 + ref_held_by_me); |
66b2b9b2 | 2730 | if (status) |
f0f51f5c | 2731 | goto out_put_session; |
e10e0cfc | 2732 | unhash_session(ses); |
c9a49628 | 2733 | spin_unlock(&nn->client_lock); |
e10e0cfc | 2734 | |
84f5f7cc | 2735 | nfsd4_probe_callback_sync(ses->se_client); |
19cf5c02 | 2736 | |
c9a49628 | 2737 | spin_lock(&nn->client_lock); |
e10e0cfc | 2738 | status = nfs_ok; |
f0f51f5c | 2739 | out_put_session: |
d4e19e70 | 2740 | nfsd4_put_session_locked(ses); |
abcdff09 BF |
2741 | out_client_lock: |
2742 | spin_unlock(&nn->client_lock); | |
e10e0cfc | 2743 | out: |
e10e0cfc | 2744 | return status; |
069b6ad4 AA |
2745 | } |
2746 | ||
a663bdd8 | 2747 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
2748 | { |
2749 | struct nfsd4_conn *c; | |
2750 | ||
2751 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 2752 | if (c->cn_xprt == xpt) { |
328ead28 BF |
2753 | return c; |
2754 | } | |
2755 | } | |
2756 | return NULL; | |
2757 | } | |
2758 | ||
57266a6e | 2759 | static __be32 nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
2760 | { |
2761 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 2762 | struct nfsd4_conn *c; |
57266a6e | 2763 | __be32 status = nfs_ok; |
21b75b01 | 2764 | int ret; |
328ead28 BF |
2765 | |
2766 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 2767 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
57266a6e BF |
2768 | if (c) |
2769 | goto out_free; | |
2770 | status = nfserr_conn_not_bound_to_session; | |
2771 | if (clp->cl_mach_cred) | |
2772 | goto out_free; | |
328ead28 BF |
2773 | __nfsd4_hash_conn(new, ses); |
2774 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
2775 | ret = nfsd4_register_conn(new); |
2776 | if (ret) | |
2777 | /* oops; xprt is already down: */ | |
2778 | nfsd4_conn_lost(&new->cn_xpt_user); | |
57266a6e BF |
2779 | return nfs_ok; |
2780 | out_free: | |
2781 | spin_unlock(&clp->cl_lock); | |
2782 | free_conn(new); | |
2783 | return status; | |
328ead28 BF |
2784 | } |
2785 | ||
868b89c3 MJ |
2786 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
2787 | { | |
2788 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
2789 | ||
2790 | return args->opcnt > session->se_fchannel.maxops; | |
2791 | } | |
2792 | ||
ae82a8d0 MJ |
2793 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
2794 | struct nfsd4_session *session) | |
2795 | { | |
2796 | struct xdr_buf *xb = &rqstp->rq_arg; | |
2797 | ||
2798 | return xb->len > session->se_fchannel.maxreq_sz; | |
2799 | } | |
2800 | ||
069b6ad4 | 2801 | __be32 |
b85d4c01 | 2802 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
2803 | struct nfsd4_compound_state *cstate, |
2804 | struct nfsd4_sequence *seq) | |
2805 | { | |
f9bb94c4 | 2806 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
47ee5298 | 2807 | struct xdr_stream *xdr = &resp->xdr; |
b85d4c01 | 2808 | struct nfsd4_session *session; |
221a6876 | 2809 | struct nfs4_client *clp; |
b85d4c01 | 2810 | struct nfsd4_slot *slot; |
a663bdd8 | 2811 | struct nfsd4_conn *conn; |
57b7b43b | 2812 | __be32 status; |
47ee5298 | 2813 | int buflen; |
d4e19e70 TM |
2814 | struct net *net = SVC_NET(rqstp); |
2815 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
b85d4c01 | 2816 | |
f9bb94c4 AA |
2817 | if (resp->opcnt != 1) |
2818 | return nfserr_sequence_pos; | |
2819 | ||
a663bdd8 BF |
2820 | /* |
2821 | * Will be either used or freed by nfsd4_sequence_check_conn | |
2822 | * below. | |
2823 | */ | |
2824 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
2825 | if (!conn) | |
2826 | return nfserr_jukebox; | |
2827 | ||
c9a49628 | 2828 | spin_lock(&nn->client_lock); |
d4e19e70 | 2829 | session = find_in_sessionid_hashtbl(&seq->sessionid, net, &status); |
b85d4c01 | 2830 | if (!session) |
221a6876 BF |
2831 | goto out_no_session; |
2832 | clp = session->se_client; | |
b85d4c01 | 2833 | |
868b89c3 MJ |
2834 | status = nfserr_too_many_ops; |
2835 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
66b2b9b2 | 2836 | goto out_put_session; |
868b89c3 | 2837 | |
ae82a8d0 MJ |
2838 | status = nfserr_req_too_big; |
2839 | if (nfsd4_request_too_big(rqstp, session)) | |
66b2b9b2 | 2840 | goto out_put_session; |
ae82a8d0 | 2841 | |
b85d4c01 | 2842 | status = nfserr_badslot; |
6c18ba9f | 2843 | if (seq->slotid >= session->se_fchannel.maxreqs) |
66b2b9b2 | 2844 | goto out_put_session; |
b85d4c01 | 2845 | |
557ce264 | 2846 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
2847 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
2848 | ||
a8dfdaeb AA |
2849 | /* We do not negotiate the number of slots yet, so set the |
2850 | * maxslots to the session maxreqs which is used to encode | |
2851 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
2852 | seq->maxslots = session->se_fchannel.maxreqs; | |
2853 | ||
73e79482 BF |
2854 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, |
2855 | slot->sl_flags & NFSD4_SLOT_INUSE); | |
b85d4c01 | 2856 | if (status == nfserr_replay_cache) { |
bf5c43c8 BF |
2857 | status = nfserr_seq_misordered; |
2858 | if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) | |
66b2b9b2 | 2859 | goto out_put_session; |
b85d4c01 BH |
2860 | cstate->slot = slot; |
2861 | cstate->session = session; | |
4b24ca7d | 2862 | cstate->clp = clp; |
da3846a2 | 2863 | /* Return the cached reply status and set cstate->status |
557ce264 | 2864 | * for nfsd4_proc_compound processing */ |
bf864a31 | 2865 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 2866 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 2867 | goto out; |
b85d4c01 BH |
2868 | } |
2869 | if (status) | |
66b2b9b2 | 2870 | goto out_put_session; |
b85d4c01 | 2871 | |
57266a6e | 2872 | status = nfsd4_sequence_check_conn(conn, session); |
a663bdd8 | 2873 | conn = NULL; |
57266a6e BF |
2874 | if (status) |
2875 | goto out_put_session; | |
328ead28 | 2876 | |
47ee5298 BF |
2877 | buflen = (seq->cachethis) ? |
2878 | session->se_fchannel.maxresp_cached : | |
2879 | session->se_fchannel.maxresp_sz; | |
2880 | status = (seq->cachethis) ? nfserr_rep_too_big_to_cache : | |
2881 | nfserr_rep_too_big; | |
a5cddc88 | 2882 | if (xdr_restrict_buflen(xdr, buflen - rqstp->rq_auth_slack)) |
47ee5298 | 2883 | goto out_put_session; |
32aaa62e | 2884 | svc_reserve(rqstp, buflen); |
47ee5298 BF |
2885 | |
2886 | status = nfs_ok; | |
b85d4c01 | 2887 | /* Success! bump slot seqid */ |
b85d4c01 | 2888 | slot->sl_seqid = seq->seqid; |
bf5c43c8 | 2889 | slot->sl_flags |= NFSD4_SLOT_INUSE; |
73e79482 BF |
2890 | if (seq->cachethis) |
2891 | slot->sl_flags |= NFSD4_SLOT_CACHETHIS; | |
bf5c43c8 BF |
2892 | else |
2893 | slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; | |
b85d4c01 BH |
2894 | |
2895 | cstate->slot = slot; | |
2896 | cstate->session = session; | |
4b24ca7d | 2897 | cstate->clp = clp; |
b85d4c01 | 2898 | |
b85d4c01 | 2899 | out: |
221a6876 BF |
2900 | switch (clp->cl_cb_state) { |
2901 | case NFSD4_CB_DOWN: | |
2902 | seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; | |
2903 | break; | |
2904 | case NFSD4_CB_FAULT: | |
2905 | seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; | |
2906 | break; | |
2907 | default: | |
2908 | seq->status_flags = 0; | |
aaf84eb9 | 2909 | } |
3bd64a5b BF |
2910 | if (!list_empty(&clp->cl_revoked)) |
2911 | seq->status_flags |= SEQ4_STATUS_RECALLABLE_STATE_REVOKED; | |
221a6876 | 2912 | out_no_session: |
3f42d2c4 KM |
2913 | if (conn) |
2914 | free_conn(conn); | |
c9a49628 | 2915 | spin_unlock(&nn->client_lock); |
b85d4c01 | 2916 | return status; |
66b2b9b2 | 2917 | out_put_session: |
d4e19e70 | 2918 | nfsd4_put_session_locked(session); |
221a6876 | 2919 | goto out_no_session; |
069b6ad4 AA |
2920 | } |
2921 | ||
b607664e TM |
2922 | void |
2923 | nfsd4_sequence_done(struct nfsd4_compoundres *resp) | |
2924 | { | |
2925 | struct nfsd4_compound_state *cs = &resp->cstate; | |
2926 | ||
2927 | if (nfsd4_has_session(cs)) { | |
b607664e TM |
2928 | if (cs->status != nfserr_replay_cache) { |
2929 | nfsd4_store_cache_entry(resp); | |
2930 | cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE; | |
2931 | } | |
d4e19e70 | 2932 | /* Drop session reference that was taken in nfsd4_sequence() */ |
b607664e | 2933 | nfsd4_put_session(cs->session); |
4b24ca7d JL |
2934 | } else if (cs->clp) |
2935 | put_client_renew(cs->clp); | |
b607664e TM |
2936 | } |
2937 | ||
345c2842 MJ |
2938 | __be32 |
2939 | nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) | |
2940 | { | |
6b10ad19 TM |
2941 | struct nfs4_client *conf, *unconf; |
2942 | struct nfs4_client *clp = NULL; | |
57b7b43b | 2943 | __be32 status = 0; |
8daae4dc | 2944 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
345c2842 | 2945 | |
6b10ad19 | 2946 | spin_lock(&nn->client_lock); |
0a7ec377 | 2947 | unconf = find_unconfirmed_client(&dc->clientid, true, nn); |
8daae4dc | 2948 | conf = find_confirmed_client(&dc->clientid, true, nn); |
78389046 | 2949 | WARN_ON_ONCE(conf && unconf); |
345c2842 MJ |
2950 | |
2951 | if (conf) { | |
c0293b01 | 2952 | if (client_has_state(conf)) { |
345c2842 MJ |
2953 | status = nfserr_clientid_busy; |
2954 | goto out; | |
2955 | } | |
fd699b8a JL |
2956 | status = mark_client_expired_locked(conf); |
2957 | if (status) | |
2958 | goto out; | |
6b10ad19 | 2959 | clp = conf; |
345c2842 MJ |
2960 | } else if (unconf) |
2961 | clp = unconf; | |
2962 | else { | |
2963 | status = nfserr_stale_clientid; | |
2964 | goto out; | |
2965 | } | |
57266a6e | 2966 | if (!mach_creds_match(clp, rqstp)) { |
6b10ad19 | 2967 | clp = NULL; |
57266a6e BF |
2968 | status = nfserr_wrong_cred; |
2969 | goto out; | |
2970 | } | |
6b10ad19 | 2971 | unhash_client_locked(clp); |
345c2842 | 2972 | out: |
6b10ad19 | 2973 | spin_unlock(&nn->client_lock); |
6b10ad19 TM |
2974 | if (clp) |
2975 | expire_client(clp); | |
345c2842 MJ |
2976 | return status; |
2977 | } | |
2978 | ||
4dc6ec00 BF |
2979 | __be32 |
2980 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
2981 | { | |
57b7b43b | 2982 | __be32 status = 0; |
bcecf1cc | 2983 | |
4dc6ec00 BF |
2984 | if (rc->rca_one_fs) { |
2985 | if (!cstate->current_fh.fh_dentry) | |
2986 | return nfserr_nofilehandle; | |
2987 | /* | |
2988 | * We don't take advantage of the rca_one_fs case. | |
2989 | * That's OK, it's optional, we can safely ignore it. | |
2990 | */ | |
2991 | return nfs_ok; | |
2992 | } | |
bcecf1cc | 2993 | |
bcecf1cc | 2994 | status = nfserr_complete_already; |
a52d726b JL |
2995 | if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, |
2996 | &cstate->session->se_client->cl_flags)) | |
bcecf1cc MJ |
2997 | goto out; |
2998 | ||
2999 | status = nfserr_stale_clientid; | |
3000 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
3001 | /* |
3002 | * The following error isn't really legal. | |
3003 | * But we only get here if the client just explicitly | |
3004 | * destroyed the client. Surely it no longer cares what | |
3005 | * error it gets back on an operation for the dead | |
3006 | * client. | |
3007 | */ | |
bcecf1cc MJ |
3008 | goto out; |
3009 | ||
3010 | status = nfs_ok; | |
2a4317c5 | 3011 | nfsd4_client_record_create(cstate->session->se_client); |
bcecf1cc | 3012 | out: |
bcecf1cc | 3013 | return status; |
4dc6ec00 BF |
3014 | } |
3015 | ||
b37ad28b | 3016 | __be32 |
b591480b BF |
3017 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3018 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 3019 | { |
a084daf5 | 3020 | struct xdr_netobj clname = setclid->se_name; |
1da177e4 | 3021 | nfs4_verifier clverifier = setclid->se_verf; |
3dbacee6 TM |
3022 | struct nfs4_client *conf, *new; |
3023 | struct nfs4_client *unconf = NULL; | |
b37ad28b | 3024 | __be32 status; |
c212cecf SK |
3025 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
3026 | ||
5cc40fd7 TM |
3027 | new = create_client(clname, rqstp, &clverifier); |
3028 | if (new == NULL) | |
3029 | return nfserr_jukebox; | |
63db4632 | 3030 | /* Cases below refer to rfc 3530 section 14.2.33: */ |
3dbacee6 | 3031 | spin_lock(&nn->client_lock); |
382a62e7 | 3032 | conf = find_confirmed_client_by_name(&clname, nn); |
28ce6054 | 3033 | if (conf) { |
63db4632 | 3034 | /* case 0: */ |
1da177e4 | 3035 | status = nfserr_clid_inuse; |
e203d506 BF |
3036 | if (clp_used_exchangeid(conf)) |
3037 | goto out; | |
026722c2 | 3038 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
3039 | char addr_str[INET6_ADDRSTRLEN]; |
3040 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
3041 | sizeof(addr_str)); | |
3042 | dprintk("NFSD: setclientid: string in use by client " | |
3043 | "at %s\n", addr_str); | |
1da177e4 LT |
3044 | goto out; |
3045 | } | |
1da177e4 | 3046 | } |
a99454aa | 3047 | unconf = find_unconfirmed_client_by_name(&clname, nn); |
8f930711 | 3048 | if (unconf) |
3dbacee6 | 3049 | unhash_client_locked(unconf); |
41eb1670 | 3050 | if (conf && same_verf(&conf->cl_verifier, &clverifier)) { |
63db4632 | 3051 | /* case 1: probable callback update */ |
1da177e4 | 3052 | copy_clid(new, conf); |
41eb1670 KM |
3053 | gen_confirm(new, nn); |
3054 | } else /* case 4 (new client) or cases 2, 3 (client reboot): */ | |
c212cecf | 3055 | gen_clid(new, nn); |
8323c3b2 | 3056 | new->cl_minorversion = 0; |
6f3d772f | 3057 | gen_callback(new, setclid, rqstp); |
ac55fdc4 | 3058 | add_to_unconfirmed(new); |
1da177e4 LT |
3059 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
3060 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
3061 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
5cc40fd7 | 3062 | new = NULL; |
1da177e4 LT |
3063 | status = nfs_ok; |
3064 | out: | |
3dbacee6 | 3065 | spin_unlock(&nn->client_lock); |
5cc40fd7 TM |
3066 | if (new) |
3067 | free_client(new); | |
3dbacee6 TM |
3068 | if (unconf) |
3069 | expire_client(unconf); | |
1da177e4 LT |
3070 | return status; |
3071 | } | |
3072 | ||
3073 | ||
b37ad28b | 3074 | __be32 |
b591480b BF |
3075 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
3076 | struct nfsd4_compound_state *cstate, | |
3077 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 3078 | { |
21ab45a4 | 3079 | struct nfs4_client *conf, *unconf; |
d20c11d8 | 3080 | struct nfs4_client *old = NULL; |
1da177e4 LT |
3081 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
3082 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 3083 | __be32 status; |
7f2210fa | 3084 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 3085 | |
2c142baa | 3086 | if (STALE_CLIENTID(clid, nn)) |
1da177e4 | 3087 | return nfserr_stale_clientid; |
21ab45a4 | 3088 | |
d20c11d8 | 3089 | spin_lock(&nn->client_lock); |
8daae4dc | 3090 | conf = find_confirmed_client(clid, false, nn); |
0a7ec377 | 3091 | unconf = find_unconfirmed_client(clid, false, nn); |
a186e767 | 3092 | /* |
8695b90a BF |
3093 | * We try hard to give out unique clientid's, so if we get an |
3094 | * attempt to confirm the same clientid with a different cred, | |
3095 | * there's a bug somewhere. Let's charitably assume it's our | |
3096 | * bug. | |
a186e767 | 3097 | */ |
8695b90a BF |
3098 | status = nfserr_serverfault; |
3099 | if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) | |
3100 | goto out; | |
3101 | if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) | |
3102 | goto out; | |
63db4632 | 3103 | /* cases below refer to rfc 3530 section 14.2.34: */ |
90d700b7 BF |
3104 | if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) { |
3105 | if (conf && !unconf) /* case 2: probable retransmit */ | |
1da177e4 | 3106 | status = nfs_ok; |
90d700b7 BF |
3107 | else /* case 4: client hasn't noticed we rebooted yet? */ |
3108 | status = nfserr_stale_clientid; | |
3109 | goto out; | |
3110 | } | |
3111 | status = nfs_ok; | |
3112 | if (conf) { /* case 1: callback update */ | |
d20c11d8 JL |
3113 | old = unconf; |
3114 | unhash_client_locked(old); | |
8695b90a | 3115 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
90d700b7 | 3116 | } else { /* case 3: normal case; new or rebooted client */ |
d20c11d8 JL |
3117 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
3118 | if (old) { | |
3119 | status = mark_client_expired_locked(old); | |
7abea1e8 JL |
3120 | if (status) { |
3121 | old = NULL; | |
221a6876 | 3122 | goto out; |
7abea1e8 | 3123 | } |
221a6876 | 3124 | } |
8695b90a | 3125 | move_to_confirmed(unconf); |
d20c11d8 | 3126 | conf = unconf; |
08e8987c | 3127 | } |
d20c11d8 JL |
3128 | get_client_locked(conf); |
3129 | spin_unlock(&nn->client_lock); | |
3130 | nfsd4_probe_callback(conf); | |
3131 | spin_lock(&nn->client_lock); | |
3132 | put_client_renew_locked(conf); | |
1da177e4 | 3133 | out: |
d20c11d8 JL |
3134 | spin_unlock(&nn->client_lock); |
3135 | if (old) | |
3136 | expire_client(old); | |
1da177e4 LT |
3137 | return status; |
3138 | } | |
3139 | ||
32513b40 BF |
3140 | static struct nfs4_file *nfsd4_alloc_file(void) |
3141 | { | |
3142 | return kmem_cache_alloc(file_slab, GFP_KERNEL); | |
3143 | } | |
3144 | ||
1da177e4 | 3145 | /* OPEN Share state helper functions */ |
5b095e99 JL |
3146 | static void nfsd4_init_file(struct knfsd_fh *fh, unsigned int hashval, |
3147 | struct nfs4_file *fp) | |
1da177e4 | 3148 | { |
950e0118 TM |
3149 | lockdep_assert_held(&state_lock); |
3150 | ||
32513b40 | 3151 | atomic_set(&fp->fi_ref, 1); |
1d31a253 | 3152 | spin_lock_init(&fp->fi_lock); |
32513b40 BF |
3153 | INIT_LIST_HEAD(&fp->fi_stateids); |
3154 | INIT_LIST_HEAD(&fp->fi_delegations); | |
8287f009 | 3155 | INIT_LIST_HEAD(&fp->fi_clnt_odstate); |
e2cf80d7 | 3156 | fh_copy_shallow(&fp->fi_fhandle, fh); |
0c637be8 | 3157 | fp->fi_deleg_file = NULL; |
32513b40 | 3158 | fp->fi_had_conflict = false; |
baeb4ff0 | 3159 | fp->fi_share_deny = 0; |
32513b40 BF |
3160 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); |
3161 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
9cf514cc CH |
3162 | #ifdef CONFIG_NFSD_PNFS |
3163 | INIT_LIST_HEAD(&fp->fi_lo_states); | |
c5c707f9 | 3164 | atomic_set(&fp->fi_lo_recalls, 0); |
9cf514cc | 3165 | #endif |
5b095e99 | 3166 | hlist_add_head_rcu(&fp->fi_hash, &file_hashtbl[hashval]); |
1da177e4 LT |
3167 | } |
3168 | ||
e8ff2a84 | 3169 | void |
1da177e4 LT |
3170 | nfsd4_free_slabs(void) |
3171 | { | |
8287f009 | 3172 | kmem_cache_destroy(odstate_slab); |
abf1135b CH |
3173 | kmem_cache_destroy(openowner_slab); |
3174 | kmem_cache_destroy(lockowner_slab); | |
3175 | kmem_cache_destroy(file_slab); | |
3176 | kmem_cache_destroy(stateid_slab); | |
3177 | kmem_cache_destroy(deleg_slab); | |
e60d4398 | 3178 | } |
1da177e4 | 3179 | |
72083396 | 3180 | int |
e60d4398 N |
3181 | nfsd4_init_slabs(void) |
3182 | { | |
fe0750e5 BF |
3183 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
3184 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
3185 | if (openowner_slab == NULL) | |
abf1135b | 3186 | goto out; |
fe0750e5 | 3187 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", |
3c40794b | 3188 | sizeof(struct nfs4_lockowner), 0, 0, NULL); |
fe0750e5 | 3189 | if (lockowner_slab == NULL) |
abf1135b | 3190 | goto out_free_openowner_slab; |
e60d4398 | 3191 | file_slab = kmem_cache_create("nfsd4_files", |
20c2df83 | 3192 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 | 3193 | if (file_slab == NULL) |
abf1135b | 3194 | goto out_free_lockowner_slab; |
5ac049ac | 3195 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
dcef0413 | 3196 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
5ac049ac | 3197 | if (stateid_slab == NULL) |
abf1135b | 3198 | goto out_free_file_slab; |
5b2d21c1 | 3199 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 3200 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 | 3201 | if (deleg_slab == NULL) |
abf1135b | 3202 | goto out_free_stateid_slab; |
8287f009 SB |
3203 | odstate_slab = kmem_cache_create("nfsd4_odstate", |
3204 | sizeof(struct nfs4_clnt_odstate), 0, 0, NULL); | |
3205 | if (odstate_slab == NULL) | |
3206 | goto out_free_deleg_slab; | |
e60d4398 | 3207 | return 0; |
abf1135b | 3208 | |
8287f009 SB |
3209 | out_free_deleg_slab: |
3210 | kmem_cache_destroy(deleg_slab); | |
abf1135b CH |
3211 | out_free_stateid_slab: |
3212 | kmem_cache_destroy(stateid_slab); | |
3213 | out_free_file_slab: | |
3214 | kmem_cache_destroy(file_slab); | |
3215 | out_free_lockowner_slab: | |
3216 | kmem_cache_destroy(lockowner_slab); | |
3217 | out_free_openowner_slab: | |
3218 | kmem_cache_destroy(openowner_slab); | |
3219 | out: | |
e60d4398 N |
3220 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); |
3221 | return -ENOMEM; | |
1da177e4 LT |
3222 | } |
3223 | ||
ff194bd9 | 3224 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 3225 | { |
ff194bd9 BF |
3226 | rp->rp_status = nfserr_serverfault; |
3227 | rp->rp_buflen = 0; | |
3228 | rp->rp_buf = rp->rp_ibuf; | |
58fb12e6 JL |
3229 | mutex_init(&rp->rp_mutex); |
3230 | } | |
3231 | ||
3232 | static void nfsd4_cstate_assign_replay(struct nfsd4_compound_state *cstate, | |
3233 | struct nfs4_stateowner *so) | |
3234 | { | |
3235 | if (!nfsd4_has_session(cstate)) { | |
3236 | mutex_lock(&so->so_replay.rp_mutex); | |
b5971afa | 3237 | cstate->replay_owner = nfs4_get_stateowner(so); |
58fb12e6 JL |
3238 | } |
3239 | } | |
3240 | ||
3241 | void nfsd4_cstate_clear_replay(struct nfsd4_compound_state *cstate) | |
3242 | { | |
3243 | struct nfs4_stateowner *so = cstate->replay_owner; | |
3244 | ||
3245 | if (so != NULL) { | |
3246 | cstate->replay_owner = NULL; | |
3247 | mutex_unlock(&so->so_replay.rp_mutex); | |
3248 | nfs4_put_stateowner(so); | |
3249 | } | |
1da177e4 LT |
3250 | } |
3251 | ||
fe0750e5 | 3252 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 3253 | { |
1da177e4 | 3254 | struct nfs4_stateowner *sop; |
1da177e4 | 3255 | |
fe0750e5 | 3256 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
3257 | if (!sop) |
3258 | return NULL; | |
3259 | ||
3260 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); | |
3261 | if (!sop->so_owner.data) { | |
fe0750e5 | 3262 | kmem_cache_free(slab, sop); |
1da177e4 | 3263 | return NULL; |
ff194bd9 BF |
3264 | } |
3265 | sop->so_owner.len = owner->len; | |
3266 | ||
ea1da636 | 3267 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 BF |
3268 | sop->so_client = clp; |
3269 | init_nfs4_replay(&sop->so_replay); | |
6b180f0b | 3270 | atomic_set(&sop->so_count, 1); |
ff194bd9 BF |
3271 | return sop; |
3272 | } | |
3273 | ||
fe0750e5 | 3274 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 | 3275 | { |
d4f0489f | 3276 | lockdep_assert_held(&clp->cl_lock); |
9b531137 | 3277 | |
d4f0489f TM |
3278 | list_add(&oo->oo_owner.so_strhash, |
3279 | &clp->cl_ownerstr_hashtbl[strhashval]); | |
fe0750e5 | 3280 | list_add(&oo->oo_perclient, &clp->cl_openowners); |
ff194bd9 BF |
3281 | } |
3282 | ||
8f4b54c5 JL |
3283 | static void nfs4_unhash_openowner(struct nfs4_stateowner *so) |
3284 | { | |
d4f0489f | 3285 | unhash_openowner_locked(openowner(so)); |
8f4b54c5 JL |
3286 | } |
3287 | ||
6b180f0b JL |
3288 | static void nfs4_free_openowner(struct nfs4_stateowner *so) |
3289 | { | |
3290 | struct nfs4_openowner *oo = openowner(so); | |
3291 | ||
3292 | kmem_cache_free(openowner_slab, oo); | |
3293 | } | |
3294 | ||
3295 | static const struct nfs4_stateowner_operations openowner_ops = { | |
8f4b54c5 JL |
3296 | .so_unhash = nfs4_unhash_openowner, |
3297 | .so_free = nfs4_free_openowner, | |
6b180f0b JL |
3298 | }; |
3299 | ||
fe0750e5 | 3300 | static struct nfs4_openowner * |
13d6f66b | 3301 | alloc_init_open_stateowner(unsigned int strhashval, struct nfsd4_open *open, |
db24b3b4 JL |
3302 | struct nfsd4_compound_state *cstate) |
3303 | { | |
13d6f66b | 3304 | struct nfs4_client *clp = cstate->clp; |
7ffb5880 | 3305 | struct nfs4_openowner *oo, *ret; |
ff194bd9 | 3306 | |
fe0750e5 BF |
3307 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
3308 | if (!oo) | |
ff194bd9 | 3309 | return NULL; |
6b180f0b | 3310 | oo->oo_owner.so_ops = &openowner_ops; |
fe0750e5 BF |
3311 | oo->oo_owner.so_is_open_owner = 1; |
3312 | oo->oo_owner.so_seqid = open->op_seqid; | |
d3134b10 | 3313 | oo->oo_flags = 0; |
db24b3b4 JL |
3314 | if (nfsd4_has_session(cstate)) |
3315 | oo->oo_flags |= NFS4_OO_CONFIRMED; | |
fe0750e5 | 3316 | oo->oo_time = 0; |
38c387b5 | 3317 | oo->oo_last_closed_stid = NULL; |
fe0750e5 | 3318 | INIT_LIST_HEAD(&oo->oo_close_lru); |
d4f0489f TM |
3319 | spin_lock(&clp->cl_lock); |
3320 | ret = find_openstateowner_str_locked(strhashval, open, clp); | |
7ffb5880 TM |
3321 | if (ret == NULL) { |
3322 | hash_openowner(oo, clp, strhashval); | |
3323 | ret = oo; | |
3324 | } else | |
d50ffded KM |
3325 | nfs4_free_stateowner(&oo->oo_owner); |
3326 | ||
d4f0489f | 3327 | spin_unlock(&clp->cl_lock); |
c5952338 | 3328 | return ret; |
1da177e4 LT |
3329 | } |
3330 | ||
996e0938 | 3331 | static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { |
fe0750e5 | 3332 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 3333 | |
d6f2bc5d | 3334 | atomic_inc(&stp->st_stid.sc_count); |
3abdb607 | 3335 | stp->st_stid.sc_type = NFS4_OPEN_STID; |
3c87b9b7 | 3336 | INIT_LIST_HEAD(&stp->st_locks); |
b5971afa | 3337 | stp->st_stateowner = nfs4_get_stateowner(&oo->oo_owner); |
13cd2184 | 3338 | get_nfs4_file(fp); |
11b9164a | 3339 | stp->st_stid.sc_file = fp; |
1da177e4 LT |
3340 | stp->st_access_bmap = 0; |
3341 | stp->st_deny_bmap = 0; | |
4c4cd222 | 3342 | stp->st_openstp = NULL; |
1c755dc1 JL |
3343 | spin_lock(&oo->oo_owner.so_client->cl_lock); |
3344 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); | |
1d31a253 TM |
3345 | spin_lock(&fp->fi_lock); |
3346 | list_add(&stp->st_perfile, &fp->fi_stateids); | |
3347 | spin_unlock(&fp->fi_lock); | |
1c755dc1 | 3348 | spin_unlock(&oo->oo_owner.so_client->cl_lock); |
1da177e4 LT |
3349 | } |
3350 | ||
d3134b10 JL |
3351 | /* |
3352 | * In the 4.0 case we need to keep the owners around a little while to handle | |
3353 | * CLOSE replay. We still do need to release any file access that is held by | |
3354 | * them before returning however. | |
3355 | */ | |
fd39ca9a | 3356 | static void |
d3134b10 | 3357 | move_to_close_lru(struct nfs4_ol_stateid *s, struct net *net) |
1da177e4 | 3358 | { |
217526e7 | 3359 | struct nfs4_ol_stateid *last; |
d3134b10 JL |
3360 | struct nfs4_openowner *oo = openowner(s->st_stateowner); |
3361 | struct nfsd_net *nn = net_generic(s->st_stid.sc_client->net, | |
3362 | nfsd_net_id); | |
73758fed | 3363 | |
fe0750e5 | 3364 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 3365 | |
b401be22 JL |
3366 | /* |
3367 | * We know that we hold one reference via nfsd4_close, and another | |
3368 | * "persistent" reference for the client. If the refcount is higher | |
3369 | * than 2, then there are still calls in progress that are using this | |
3370 | * stateid. We can't put the sc_file reference until they are finished. | |
3371 | * Wait for the refcount to drop to 2. Since it has been unhashed, | |
3372 | * there should be no danger of the refcount going back up again at | |
3373 | * this point. | |
3374 | */ | |
3375 | wait_event(close_wq, atomic_read(&s->st_stid.sc_count) == 2); | |
3376 | ||
d3134b10 JL |
3377 | release_all_access(s); |
3378 | if (s->st_stid.sc_file) { | |
3379 | put_nfs4_file(s->st_stid.sc_file); | |
3380 | s->st_stid.sc_file = NULL; | |
3381 | } | |
217526e7 JL |
3382 | |
3383 | spin_lock(&nn->client_lock); | |
3384 | last = oo->oo_last_closed_stid; | |
d3134b10 | 3385 | oo->oo_last_closed_stid = s; |
73758fed | 3386 | list_move_tail(&oo->oo_close_lru, &nn->close_lru); |
fe0750e5 | 3387 | oo->oo_time = get_seconds(); |
217526e7 JL |
3388 | spin_unlock(&nn->client_lock); |
3389 | if (last) | |
3390 | nfs4_put_stid(&last->st_stid); | |
1da177e4 LT |
3391 | } |
3392 | ||
1da177e4 LT |
3393 | /* search file_hashtbl[] for file */ |
3394 | static struct nfs4_file * | |
5b095e99 | 3395 | find_file_locked(struct knfsd_fh *fh, unsigned int hashval) |
1da177e4 | 3396 | { |
1da177e4 LT |
3397 | struct nfs4_file *fp; |
3398 | ||
5b095e99 | 3399 | hlist_for_each_entry_rcu(fp, &file_hashtbl[hashval], fi_hash) { |
4d94c2ef | 3400 | if (fh_match(&fp->fi_fhandle, fh)) { |
5b095e99 JL |
3401 | if (atomic_inc_not_zero(&fp->fi_ref)) |
3402 | return fp; | |
13cd2184 | 3403 | } |
1da177e4 LT |
3404 | } |
3405 | return NULL; | |
3406 | } | |
3407 | ||
e6ba76e1 | 3408 | struct nfs4_file * |
ca943217 | 3409 | find_file(struct knfsd_fh *fh) |
950e0118 TM |
3410 | { |
3411 | struct nfs4_file *fp; | |
5b095e99 | 3412 | unsigned int hashval = file_hashval(fh); |
950e0118 | 3413 | |
5b095e99 JL |
3414 | rcu_read_lock(); |
3415 | fp = find_file_locked(fh, hashval); | |
3416 | rcu_read_unlock(); | |
950e0118 TM |
3417 | return fp; |
3418 | } | |
3419 | ||
3420 | static struct nfs4_file * | |
f9c00c3a | 3421 | find_or_add_file(struct nfs4_file *new, struct knfsd_fh *fh) |
950e0118 TM |
3422 | { |
3423 | struct nfs4_file *fp; | |
5b095e99 JL |
3424 | unsigned int hashval = file_hashval(fh); |
3425 | ||
3426 | rcu_read_lock(); | |
3427 | fp = find_file_locked(fh, hashval); | |
3428 | rcu_read_unlock(); | |
3429 | if (fp) | |
3430 | return fp; | |
950e0118 TM |
3431 | |
3432 | spin_lock(&state_lock); | |
5b095e99 JL |
3433 | fp = find_file_locked(fh, hashval); |
3434 | if (likely(fp == NULL)) { | |
3435 | nfsd4_init_file(fh, hashval, new); | |
950e0118 TM |
3436 | fp = new; |
3437 | } | |
3438 | spin_unlock(&state_lock); | |
3439 | ||
3440 | return fp; | |
3441 | } | |
3442 | ||
1da177e4 LT |
3443 | /* |
3444 | * Called to check deny when READ with all zero stateid or | |
3445 | * WRITE with all zero or all one stateid | |
3446 | */ | |
b37ad28b | 3447 | static __be32 |
1da177e4 LT |
3448 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
3449 | { | |
1da177e4 | 3450 | struct nfs4_file *fp; |
baeb4ff0 | 3451 | __be32 ret = nfs_ok; |
1da177e4 | 3452 | |
ca943217 | 3453 | fp = find_file(¤t_fh->fh_handle); |
13cd2184 | 3454 | if (!fp) |
baeb4ff0 JL |
3455 | return ret; |
3456 | /* Check for conflicting share reservations */ | |
1d31a253 | 3457 | spin_lock(&fp->fi_lock); |
baeb4ff0 JL |
3458 | if (fp->fi_share_deny & deny_type) |
3459 | ret = nfserr_locked; | |
1d31a253 | 3460 | spin_unlock(&fp->fi_lock); |
13cd2184 N |
3461 | put_nfs4_file(fp); |
3462 | return ret; | |
1da177e4 LT |
3463 | } |
3464 | ||
0162ac2b | 3465 | static void nfsd4_cb_recall_prepare(struct nfsd4_callback *cb) |
1da177e4 | 3466 | { |
0162ac2b | 3467 | struct nfs4_delegation *dp = cb_to_delegation(cb); |
11b9164a TM |
3468 | struct nfsd_net *nn = net_generic(dp->dl_stid.sc_client->net, |
3469 | nfsd_net_id); | |
e8c69d17 | 3470 | |
11b9164a | 3471 | block_delegations(&dp->dl_stid.sc_file->fi_fhandle); |
f54fe962 | 3472 | |
dff1399f | 3473 | /* |
f54fe962 JL |
3474 | * We can't do this in nfsd_break_deleg_cb because it is |
3475 | * already holding inode->i_lock. | |
3476 | * | |
dff1399f JL |
3477 | * If the dl_time != 0, then we know that it has already been |
3478 | * queued for a lease break. Don't queue it again. | |
3479 | */ | |
f54fe962 | 3480 | spin_lock(&state_lock); |
dff1399f | 3481 | if (dp->dl_time == 0) { |
dff1399f | 3482 | dp->dl_time = get_seconds(); |
02e1215f | 3483 | list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru); |
dff1399f | 3484 | } |
02e1215f JL |
3485 | spin_unlock(&state_lock); |
3486 | } | |
1da177e4 | 3487 | |
0162ac2b CH |
3488 | static int nfsd4_cb_recall_done(struct nfsd4_callback *cb, |
3489 | struct rpc_task *task) | |
3490 | { | |
3491 | struct nfs4_delegation *dp = cb_to_delegation(cb); | |
3492 | ||
3493 | switch (task->tk_status) { | |
3494 | case 0: | |
3495 | return 1; | |
3496 | case -EBADHANDLE: | |
3497 | case -NFS4ERR_BAD_STATEID: | |
3498 | /* | |
3499 | * Race: client probably got cb_recall before open reply | |
3500 | * granting delegation. | |
3501 | */ | |
3502 | if (dp->dl_retries--) { | |
3503 | rpc_delay(task, 2 * HZ); | |
3504 | return 0; | |
3505 | } | |
3506 | /*FALLTHRU*/ | |
3507 | default: | |
3508 | return -1; | |
3509 | } | |
3510 | } | |
3511 | ||
3512 | static void nfsd4_cb_recall_release(struct nfsd4_callback *cb) | |
3513 | { | |
3514 | struct nfs4_delegation *dp = cb_to_delegation(cb); | |
3515 | ||
3516 | nfs4_put_stid(&dp->dl_stid); | |
3517 | } | |
3518 | ||
3519 | static struct nfsd4_callback_ops nfsd4_cb_recall_ops = { | |
3520 | .prepare = nfsd4_cb_recall_prepare, | |
3521 | .done = nfsd4_cb_recall_done, | |
3522 | .release = nfsd4_cb_recall_release, | |
3523 | }; | |
3524 | ||
02e1215f JL |
3525 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
3526 | { | |
3527 | /* | |
3528 | * We're assuming the state code never drops its reference | |
3529 | * without first removing the lease. Since we're in this lease | |
3530 | * callback (and since the lease code is serialized by the kernel | |
3531 | * lock) we know the server hasn't removed the lease yet, we know | |
3532 | * it's safe to take a reference. | |
3533 | */ | |
72c0b0fb | 3534 | atomic_inc(&dp->dl_stid.sc_count); |
f0b5de1b | 3535 | nfsd4_run_cb(&dp->dl_recall); |
6b57d9c8 BF |
3536 | } |
3537 | ||
1c8c601a | 3538 | /* Called from break_lease() with i_lock held. */ |
4d01b7f5 JL |
3539 | static bool |
3540 | nfsd_break_deleg_cb(struct file_lock *fl) | |
6b57d9c8 | 3541 | { |
4d01b7f5 | 3542 | bool ret = false; |
acfdf5c3 BF |
3543 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
3544 | struct nfs4_delegation *dp; | |
6b57d9c8 | 3545 | |
7fa10cd1 BF |
3546 | if (!fp) { |
3547 | WARN(1, "(%p)->fl_owner NULL\n", fl); | |
4d01b7f5 | 3548 | return ret; |
7fa10cd1 BF |
3549 | } |
3550 | if (fp->fi_had_conflict) { | |
3551 | WARN(1, "duplicate break on %p\n", fp); | |
4d01b7f5 | 3552 | return ret; |
7fa10cd1 | 3553 | } |
0272e1fd BF |
3554 | /* |
3555 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 3556 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 3557 | * in time: |
0272e1fd BF |
3558 | */ |
3559 | fl->fl_break_time = 0; | |
1da177e4 | 3560 | |
02e1215f | 3561 | spin_lock(&fp->fi_lock); |
417c6629 JL |
3562 | fp->fi_had_conflict = true; |
3563 | /* | |
4d01b7f5 JL |
3564 | * If there are no delegations on the list, then return true |
3565 | * so that the lease code will go ahead and delete it. | |
417c6629 JL |
3566 | */ |
3567 | if (list_empty(&fp->fi_delegations)) | |
4d01b7f5 | 3568 | ret = true; |
417c6629 JL |
3569 | else |
3570 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
3571 | nfsd_break_one_deleg(dp); | |
02e1215f | 3572 | spin_unlock(&fp->fi_lock); |
4d01b7f5 | 3573 | return ret; |
1da177e4 LT |
3574 | } |
3575 | ||
c45198ed | 3576 | static int |
7448cc37 JL |
3577 | nfsd_change_deleg_cb(struct file_lock *onlist, int arg, |
3578 | struct list_head *dispose) | |
1da177e4 LT |
3579 | { |
3580 | if (arg & F_UNLCK) | |
c45198ed | 3581 | return lease_modify(onlist, arg, dispose); |
1da177e4 LT |
3582 | else |
3583 | return -EAGAIN; | |
3584 | } | |
3585 | ||
7b021967 | 3586 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
3587 | .lm_break = nfsd_break_deleg_cb, |
3588 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
3589 | }; |
3590 | ||
7a8711c9 BF |
3591 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
3592 | { | |
3593 | if (nfsd4_has_session(cstate)) | |
3594 | return nfs_ok; | |
3595 | if (seqid == so->so_seqid - 1) | |
3596 | return nfserr_replay_me; | |
3597 | if (seqid == so->so_seqid) | |
3598 | return nfs_ok; | |
3599 | return nfserr_bad_seqid; | |
3600 | } | |
1da177e4 | 3601 | |
4b24ca7d JL |
3602 | static __be32 lookup_clientid(clientid_t *clid, |
3603 | struct nfsd4_compound_state *cstate, | |
3604 | struct nfsd_net *nn) | |
3605 | { | |
3606 | struct nfs4_client *found; | |
3607 | ||
3608 | if (cstate->clp) { | |
3609 | found = cstate->clp; | |
3610 | if (!same_clid(&found->cl_clientid, clid)) | |
3611 | return nfserr_stale_clientid; | |
3612 | return nfs_ok; | |
3613 | } | |
3614 | ||
3615 | if (STALE_CLIENTID(clid, nn)) | |
3616 | return nfserr_stale_clientid; | |
3617 | ||
3618 | /* | |
3619 | * For v4.1+ we get the client in the SEQUENCE op. If we don't have one | |
3620 | * cached already then we know this is for is for v4.0 and "sessions" | |
3621 | * will be false. | |
3622 | */ | |
3623 | WARN_ON_ONCE(cstate->session); | |
3e339f96 | 3624 | spin_lock(&nn->client_lock); |
4b24ca7d | 3625 | found = find_confirmed_client(clid, false, nn); |
3e339f96 TM |
3626 | if (!found) { |
3627 | spin_unlock(&nn->client_lock); | |
4b24ca7d | 3628 | return nfserr_expired; |
3e339f96 TM |
3629 | } |
3630 | atomic_inc(&found->cl_refcount); | |
3631 | spin_unlock(&nn->client_lock); | |
4b24ca7d JL |
3632 | |
3633 | /* Cache the nfs4_client in cstate! */ | |
3634 | cstate->clp = found; | |
4b24ca7d JL |
3635 | return nfs_ok; |
3636 | } | |
3637 | ||
b37ad28b | 3638 | __be32 |
6668958f | 3639 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
3320fef1 | 3640 | struct nfsd4_open *open, struct nfsd_net *nn) |
1da177e4 | 3641 | { |
1da177e4 LT |
3642 | clientid_t *clientid = &open->op_clientid; |
3643 | struct nfs4_client *clp = NULL; | |
3644 | unsigned int strhashval; | |
fe0750e5 | 3645 | struct nfs4_openowner *oo = NULL; |
4cdc951b | 3646 | __be32 status; |
1da177e4 | 3647 | |
2c142baa | 3648 | if (STALE_CLIENTID(&open->op_clientid, nn)) |
1da177e4 | 3649 | return nfserr_stale_clientid; |
32513b40 BF |
3650 | /* |
3651 | * In case we need it later, after we've already created the | |
3652 | * file and don't want to risk a further failure: | |
3653 | */ | |
3654 | open->op_file = nfsd4_alloc_file(); | |
3655 | if (open->op_file == NULL) | |
3656 | return nfserr_jukebox; | |
1da177e4 | 3657 | |
2d91e895 TM |
3658 | status = lookup_clientid(clientid, cstate, nn); |
3659 | if (status) | |
3660 | return status; | |
3661 | clp = cstate->clp; | |
3662 | ||
d4f0489f TM |
3663 | strhashval = ownerstr_hashval(&open->op_owner); |
3664 | oo = find_openstateowner_str(strhashval, open, clp); | |
fe0750e5 BF |
3665 | open->op_openowner = oo; |
3666 | if (!oo) { | |
bcf130f9 | 3667 | goto new_owner; |
1da177e4 | 3668 | } |
dad1c067 | 3669 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
0f442aa2 | 3670 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
3671 | release_openowner(oo); |
3672 | open->op_openowner = NULL; | |
bcf130f9 | 3673 | goto new_owner; |
0f442aa2 | 3674 | } |
4cdc951b BF |
3675 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
3676 | if (status) | |
3677 | return status; | |
4cdc951b | 3678 | goto alloc_stateid; |
bcf130f9 | 3679 | new_owner: |
13d6f66b | 3680 | oo = alloc_init_open_stateowner(strhashval, open, cstate); |
bcf130f9 BF |
3681 | if (oo == NULL) |
3682 | return nfserr_jukebox; | |
3683 | open->op_openowner = oo; | |
4cdc951b | 3684 | alloc_stateid: |
b49e084d | 3685 | open->op_stp = nfs4_alloc_open_stateid(clp); |
4cdc951b BF |
3686 | if (!open->op_stp) |
3687 | return nfserr_jukebox; | |
8287f009 SB |
3688 | |
3689 | if (nfsd4_has_session(cstate) && | |
3690 | (cstate->current_fh.fh_export->ex_flags & NFSEXP_PNFS)) { | |
3691 | open->op_odstate = alloc_clnt_odstate(clp); | |
3692 | if (!open->op_odstate) | |
3693 | return nfserr_jukebox; | |
3694 | } | |
3695 | ||
0f442aa2 | 3696 | return nfs_ok; |
1da177e4 LT |
3697 | } |
3698 | ||
b37ad28b | 3699 | static inline __be32 |
4a6e43e6 N |
3700 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
3701 | { | |
3702 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
3703 | return nfserr_openmode; | |
3704 | else | |
3705 | return nfs_ok; | |
3706 | } | |
3707 | ||
f459e453 | 3708 | static int share_access_to_flags(u32 share_access) |
52f4fb43 | 3709 | { |
f459e453 | 3710 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
52f4fb43 N |
3711 | } |
3712 | ||
38c2f4b1 | 3713 | static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) |
24a0111e | 3714 | { |
f459e453 | 3715 | struct nfs4_stid *ret; |
24a0111e | 3716 | |
38c2f4b1 | 3717 | ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); |
f459e453 BF |
3718 | if (!ret) |
3719 | return NULL; | |
3720 | return delegstateid(ret); | |
24a0111e BF |
3721 | } |
3722 | ||
8b289b2c BF |
3723 | static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) |
3724 | { | |
3725 | return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || | |
3726 | open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; | |
3727 | } | |
3728 | ||
b37ad28b | 3729 | static __be32 |
41d22663 | 3730 | nfs4_check_deleg(struct nfs4_client *cl, struct nfsd4_open *open, |
567d9829 N |
3731 | struct nfs4_delegation **dp) |
3732 | { | |
3733 | int flags; | |
b37ad28b | 3734 | __be32 status = nfserr_bad_stateid; |
dcd94cc2 | 3735 | struct nfs4_delegation *deleg; |
567d9829 | 3736 | |
dcd94cc2 TM |
3737 | deleg = find_deleg_stateid(cl, &open->op_delegate_stateid); |
3738 | if (deleg == NULL) | |
c44c5eeb | 3739 | goto out; |
24a0111e | 3740 | flags = share_access_to_flags(open->op_share_access); |
dcd94cc2 TM |
3741 | status = nfs4_check_delegmode(deleg, flags); |
3742 | if (status) { | |
3743 | nfs4_put_stid(&deleg->dl_stid); | |
3744 | goto out; | |
3745 | } | |
3746 | *dp = deleg; | |
c44c5eeb | 3747 | out: |
8b289b2c | 3748 | if (!nfsd4_is_deleg_cur(open)) |
c44c5eeb N |
3749 | return nfs_ok; |
3750 | if (status) | |
3751 | return status; | |
dad1c067 | 3752 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
c44c5eeb | 3753 | return nfs_ok; |
567d9829 N |
3754 | } |
3755 | ||
a46cb7f2 JL |
3756 | static struct nfs4_ol_stateid * |
3757 | nfsd4_find_existing_open(struct nfs4_file *fp, struct nfsd4_open *open) | |
1da177e4 | 3758 | { |
a46cb7f2 | 3759 | struct nfs4_ol_stateid *local, *ret = NULL; |
fe0750e5 | 3760 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 3761 | |
1d31a253 | 3762 | spin_lock(&fp->fi_lock); |
8beefa24 | 3763 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
3764 | /* ignore lock owners */ |
3765 | if (local->st_stateowner->so_is_open_owner == 0) | |
3766 | continue; | |
baeb4ff0 | 3767 | if (local->st_stateowner == &oo->oo_owner) { |
a46cb7f2 | 3768 | ret = local; |
d6f2bc5d | 3769 | atomic_inc(&ret->st_stid.sc_count); |
baeb4ff0 | 3770 | break; |
1d31a253 | 3771 | } |
1da177e4 | 3772 | } |
1d31a253 | 3773 | spin_unlock(&fp->fi_lock); |
a46cb7f2 | 3774 | return ret; |
1da177e4 LT |
3775 | } |
3776 | ||
21fb4016 BF |
3777 | static inline int nfs4_access_to_access(u32 nfs4_access) |
3778 | { | |
3779 | int flags = 0; | |
3780 | ||
3781 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
3782 | flags |= NFSD_MAY_READ; | |
3783 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
3784 | flags |= NFSD_MAY_WRITE; | |
3785 | return flags; | |
3786 | } | |
3787 | ||
7e6a72e5 CH |
3788 | static inline __be32 |
3789 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, | |
3790 | struct nfsd4_open *open) | |
3791 | { | |
3792 | struct iattr iattr = { | |
3793 | .ia_valid = ATTR_SIZE, | |
3794 | .ia_size = 0, | |
3795 | }; | |
3796 | if (!open->op_truncate) | |
3797 | return 0; | |
3798 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
3799 | return nfserr_inval; | |
3800 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); | |
3801 | } | |
3802 | ||
0c12eaff | 3803 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
6eb3a1d0 JL |
3804 | struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp, |
3805 | struct nfsd4_open *open) | |
f9d7562f | 3806 | { |
de18643d | 3807 | struct file *filp = NULL; |
f9d7562f | 3808 | __be32 status; |
0c12eaff CB |
3809 | int oflag = nfs4_access_to_omode(open->op_share_access); |
3810 | int access = nfs4_access_to_access(open->op_share_access); | |
baeb4ff0 | 3811 | unsigned char old_access_bmap, old_deny_bmap; |
0c12eaff | 3812 | |
de18643d | 3813 | spin_lock(&fp->fi_lock); |
baeb4ff0 JL |
3814 | |
3815 | /* | |
3816 | * Are we trying to set a deny mode that would conflict with | |
3817 | * current access? | |
3818 | */ | |
3819 | status = nfs4_file_check_deny(fp, open->op_share_deny); | |
3820 | if (status != nfs_ok) { | |
3821 | spin_unlock(&fp->fi_lock); | |
3822 | goto out; | |
3823 | } | |
3824 | ||
3825 | /* set access to the file */ | |
3826 | status = nfs4_file_get_access(fp, open->op_share_access); | |
3827 | if (status != nfs_ok) { | |
3828 | spin_unlock(&fp->fi_lock); | |
3829 | goto out; | |
3830 | } | |
3831 | ||
3832 | /* Set access bits in stateid */ | |
3833 | old_access_bmap = stp->st_access_bmap; | |
3834 | set_access(open->op_share_access, stp); | |
3835 | ||
3836 | /* Set new deny mask */ | |
3837 | old_deny_bmap = stp->st_deny_bmap; | |
3838 | set_deny(open->op_share_deny, stp); | |
3839 | fp->fi_share_deny |= (open->op_share_deny & NFS4_SHARE_DENY_BOTH); | |
3840 | ||
f9d7562f | 3841 | if (!fp->fi_fds[oflag]) { |
de18643d TM |
3842 | spin_unlock(&fp->fi_lock); |
3843 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, &filp); | |
f9d7562f | 3844 | if (status) |
baeb4ff0 | 3845 | goto out_put_access; |
de18643d TM |
3846 | spin_lock(&fp->fi_lock); |
3847 | if (!fp->fi_fds[oflag]) { | |
3848 | fp->fi_fds[oflag] = filp; | |
3849 | filp = NULL; | |
3850 | } | |
f9d7562f | 3851 | } |
de18643d TM |
3852 | spin_unlock(&fp->fi_lock); |
3853 | if (filp) | |
3854 | fput(filp); | |
f9d7562f | 3855 | |
7e6a72e5 CH |
3856 | status = nfsd4_truncate(rqstp, cur_fh, open); |
3857 | if (status) | |
3858 | goto out_put_access; | |
7e6a72e5 CH |
3859 | out: |
3860 | return status; | |
baeb4ff0 JL |
3861 | out_put_access: |
3862 | stp->st_access_bmap = old_access_bmap; | |
3863 | nfs4_file_put_access(fp, open->op_share_access); | |
3864 | reset_union_bmap_deny(bmap_to_share_mode(old_deny_bmap), stp); | |
3865 | goto out; | |
1da177e4 LT |
3866 | } |
3867 | ||
b37ad28b | 3868 | static __be32 |
dcef0413 | 3869 | 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 | 3870 | { |
b37ad28b | 3871 | __be32 status; |
6ac75368 | 3872 | unsigned char old_deny_bmap = stp->st_deny_bmap; |
1da177e4 | 3873 | |
6eb3a1d0 | 3874 | if (!test_access(open->op_share_access, stp)) |
baeb4ff0 | 3875 | return nfs4_get_vfs_file(rqstp, fp, cur_fh, stp, open); |
7e6a72e5 | 3876 | |
baeb4ff0 JL |
3877 | /* test and set deny mode */ |
3878 | spin_lock(&fp->fi_lock); | |
3879 | status = nfs4_file_check_deny(fp, open->op_share_deny); | |
3880 | if (status == nfs_ok) { | |
baeb4ff0 JL |
3881 | set_deny(open->op_share_deny, stp); |
3882 | fp->fi_share_deny |= | |
3883 | (open->op_share_deny & NFS4_SHARE_DENY_BOTH); | |
3884 | } | |
3885 | spin_unlock(&fp->fi_lock); | |
3886 | ||
3887 | if (status != nfs_ok) | |
1da177e4 | 3888 | return status; |
1da177e4 | 3889 | |
baeb4ff0 JL |
3890 | status = nfsd4_truncate(rqstp, cur_fh, open); |
3891 | if (status != nfs_ok) | |
3892 | reset_union_bmap_deny(old_deny_bmap, stp); | |
3893 | return status; | |
3894 | } | |
1da177e4 | 3895 | |
14a24e99 BF |
3896 | /* Should we give out recallable state?: */ |
3897 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
3898 | { | |
3899 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
3900 | return true; | |
3901 | /* | |
3902 | * In the sessions case, since we don't have to establish a | |
3903 | * separate connection for callbacks, we assume it's OK | |
3904 | * until we hear otherwise: | |
3905 | */ | |
3906 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
3907 | } | |
3908 | ||
d564fbec | 3909 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_file *fp, int flag) |
22d38c4c BF |
3910 | { |
3911 | struct file_lock *fl; | |
3912 | ||
3913 | fl = locks_alloc_lock(); | |
3914 | if (!fl) | |
3915 | return NULL; | |
22d38c4c | 3916 | fl->fl_lmops = &nfsd_lease_mng_ops; |
617588d5 | 3917 | fl->fl_flags = FL_DELEG; |
22d38c4c BF |
3918 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; |
3919 | fl->fl_end = OFFSET_MAX; | |
d564fbec | 3920 | fl->fl_owner = (fl_owner_t)fp; |
22d38c4c | 3921 | fl->fl_pid = current->tgid; |
22d38c4c BF |
3922 | return fl; |
3923 | } | |
3924 | ||
99c41515 | 3925 | static int nfs4_setlease(struct nfs4_delegation *dp) |
edab9782 | 3926 | { |
11b9164a | 3927 | struct nfs4_file *fp = dp->dl_stid.sc_file; |
efde6b4d | 3928 | struct file_lock *fl; |
417c6629 JL |
3929 | struct file *filp; |
3930 | int status = 0; | |
edab9782 | 3931 | |
d564fbec | 3932 | fl = nfs4_alloc_init_lease(fp, NFS4_OPEN_DELEGATE_READ); |
edab9782 BF |
3933 | if (!fl) |
3934 | return -ENOMEM; | |
417c6629 JL |
3935 | filp = find_readable_file(fp); |
3936 | if (!filp) { | |
3937 | /* We should always have a readable file here */ | |
3938 | WARN_ON_ONCE(1); | |
af9dbaf4 | 3939 | locks_free_lock(fl); |
417c6629 JL |
3940 | return -EBADF; |
3941 | } | |
3942 | fl->fl_file = filp; | |
e6f5c789 | 3943 | status = vfs_setlease(filp, fl->fl_type, &fl, NULL); |
1c7dd2ff | 3944 | if (fl) |
417c6629 | 3945 | locks_free_lock(fl); |
1c7dd2ff | 3946 | if (status) |
417c6629 | 3947 | goto out_fput; |
417c6629 JL |
3948 | spin_lock(&state_lock); |
3949 | spin_lock(&fp->fi_lock); | |
3950 | /* Did the lease get broken before we took the lock? */ | |
3951 | status = -EAGAIN; | |
3952 | if (fp->fi_had_conflict) | |
3953 | goto out_unlock; | |
3954 | /* Race breaker */ | |
0c637be8 | 3955 | if (fp->fi_deleg_file) { |
417c6629 | 3956 | status = 0; |
67db1034 | 3957 | ++fp->fi_delegees; |
417c6629 JL |
3958 | hash_delegation_locked(dp, fp); |
3959 | goto out_unlock; | |
3960 | } | |
417c6629 | 3961 | fp->fi_deleg_file = filp; |
67db1034 | 3962 | fp->fi_delegees = 1; |
931ee56c | 3963 | hash_delegation_locked(dp, fp); |
417c6629 | 3964 | spin_unlock(&fp->fi_lock); |
cdc97505 | 3965 | spin_unlock(&state_lock); |
acfdf5c3 | 3966 | return 0; |
417c6629 JL |
3967 | out_unlock: |
3968 | spin_unlock(&fp->fi_lock); | |
3969 | spin_unlock(&state_lock); | |
3970 | out_fput: | |
3971 | fput(filp); | |
e873088f | 3972 | return status; |
acfdf5c3 BF |
3973 | } |
3974 | ||
0b26693c JL |
3975 | static struct nfs4_delegation * |
3976 | nfs4_set_delegation(struct nfs4_client *clp, struct svc_fh *fh, | |
8287f009 | 3977 | struct nfs4_file *fp, struct nfs4_clnt_odstate *odstate) |
acfdf5c3 | 3978 | { |
0b26693c JL |
3979 | int status; |
3980 | struct nfs4_delegation *dp; | |
417c6629 | 3981 | |
bf7bd3e9 | 3982 | if (fp->fi_had_conflict) |
0b26693c JL |
3983 | return ERR_PTR(-EAGAIN); |
3984 | ||
8287f009 | 3985 | dp = alloc_init_deleg(clp, fh, odstate); |
0b26693c JL |
3986 | if (!dp) |
3987 | return ERR_PTR(-ENOMEM); | |
3988 | ||
bf7bd3e9 | 3989 | get_nfs4_file(fp); |
417c6629 JL |
3990 | spin_lock(&state_lock); |
3991 | spin_lock(&fp->fi_lock); | |
11b9164a | 3992 | dp->dl_stid.sc_file = fp; |
0c637be8 | 3993 | if (!fp->fi_deleg_file) { |
417c6629 JL |
3994 | spin_unlock(&fp->fi_lock); |
3995 | spin_unlock(&state_lock); | |
0b26693c JL |
3996 | status = nfs4_setlease(dp); |
3997 | goto out; | |
417c6629 | 3998 | } |
acfdf5c3 | 3999 | if (fp->fi_had_conflict) { |
417c6629 JL |
4000 | status = -EAGAIN; |
4001 | goto out_unlock; | |
acfdf5c3 | 4002 | } |
67db1034 | 4003 | ++fp->fi_delegees; |
931ee56c | 4004 | hash_delegation_locked(dp, fp); |
0b26693c | 4005 | status = 0; |
417c6629 JL |
4006 | out_unlock: |
4007 | spin_unlock(&fp->fi_lock); | |
cdc97505 | 4008 | spin_unlock(&state_lock); |
0b26693c JL |
4009 | out: |
4010 | if (status) { | |
8287f009 | 4011 | put_clnt_odstate(dp->dl_clnt_odstate); |
6011695d | 4012 | nfs4_put_stid(&dp->dl_stid); |
0b26693c JL |
4013 | return ERR_PTR(status); |
4014 | } | |
4015 | return dp; | |
edab9782 BF |
4016 | } |
4017 | ||
4aa8913c BH |
4018 | static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) |
4019 | { | |
4020 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
4021 | if (status == -EAGAIN) | |
4022 | open->op_why_no_deleg = WND4_CONTENTION; | |
4023 | else { | |
4024 | open->op_why_no_deleg = WND4_RESOURCE; | |
4025 | switch (open->op_deleg_want) { | |
4026 | case NFS4_SHARE_WANT_READ_DELEG: | |
4027 | case NFS4_SHARE_WANT_WRITE_DELEG: | |
4028 | case NFS4_SHARE_WANT_ANY_DELEG: | |
4029 | break; | |
4030 | case NFS4_SHARE_WANT_CANCEL: | |
4031 | open->op_why_no_deleg = WND4_CANCELLED; | |
4032 | break; | |
4033 | case NFS4_SHARE_WANT_NO_DELEG: | |
063b0fb9 | 4034 | WARN_ON_ONCE(1); |
4aa8913c BH |
4035 | } |
4036 | } | |
4037 | } | |
4038 | ||
1da177e4 LT |
4039 | /* |
4040 | * Attempt to hand out a delegation. | |
99c41515 BF |
4041 | * |
4042 | * Note we don't support write delegations, and won't until the vfs has | |
4043 | * proper support for them. | |
1da177e4 LT |
4044 | */ |
4045 | static void | |
4cf59221 JL |
4046 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, |
4047 | struct nfs4_ol_stateid *stp) | |
1da177e4 LT |
4048 | { |
4049 | struct nfs4_delegation *dp; | |
4cf59221 JL |
4050 | struct nfs4_openowner *oo = openowner(stp->st_stateowner); |
4051 | struct nfs4_client *clp = stp->st_stid.sc_client; | |
14a24e99 | 4052 | int cb_up; |
99c41515 | 4053 | int status = 0; |
1da177e4 | 4054 | |
fe0750e5 | 4055 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
7b190fec N |
4056 | open->op_recall = 0; |
4057 | switch (open->op_claim_type) { | |
4058 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 4059 | if (!cb_up) |
7b190fec | 4060 | open->op_recall = 1; |
99c41515 BF |
4061 | if (open->op_delegate_type != NFS4_OPEN_DELEGATE_READ) |
4062 | goto out_no_deleg; | |
7b190fec N |
4063 | break; |
4064 | case NFS4_OPEN_CLAIM_NULL: | |
ed47b062 | 4065 | case NFS4_OPEN_CLAIM_FH: |
99c41515 BF |
4066 | /* |
4067 | * Let's not give out any delegations till everyone's | |
4068 | * had the chance to reclaim theirs.... | |
4069 | */ | |
4cf59221 | 4070 | if (locks_in_grace(clp->net)) |
99c41515 | 4071 | goto out_no_deleg; |
dad1c067 | 4072 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
99c41515 | 4073 | goto out_no_deleg; |
9a0590ae SD |
4074 | /* |
4075 | * Also, if the file was opened for write or | |
4076 | * create, there's a good chance the client's | |
4077 | * about to write to it, resulting in an | |
4078 | * immediate recall (since we don't support | |
4079 | * write delegations): | |
4080 | */ | |
7b190fec | 4081 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
99c41515 BF |
4082 | goto out_no_deleg; |
4083 | if (open->op_create == NFS4_OPEN_CREATE) | |
4084 | goto out_no_deleg; | |
7b190fec N |
4085 | break; |
4086 | default: | |
99c41515 | 4087 | goto out_no_deleg; |
7b190fec | 4088 | } |
8287f009 | 4089 | dp = nfs4_set_delegation(clp, fh, stp->st_stid.sc_file, stp->st_clnt_odstate); |
0b26693c | 4090 | if (IS_ERR(dp)) |
dd239cc0 | 4091 | goto out_no_deleg; |
1da177e4 | 4092 | |
d5477a8d | 4093 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 4094 | |
8c10cbdb | 4095 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
d5477a8d | 4096 | STATEID_VAL(&dp->dl_stid.sc_stateid)); |
99c41515 | 4097 | open->op_delegate_type = NFS4_OPEN_DELEGATE_READ; |
67cb1279 | 4098 | nfs4_put_stid(&dp->dl_stid); |
dd239cc0 | 4099 | return; |
dd239cc0 | 4100 | out_no_deleg: |
99c41515 BF |
4101 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE; |
4102 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && | |
d08d32e6 | 4103 | open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) { |
99c41515 | 4104 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
d08d32e6 BF |
4105 | open->op_recall = 1; |
4106 | } | |
99c41515 BF |
4107 | |
4108 | /* 4.1 client asking for a delegation? */ | |
4109 | if (open->op_deleg_want) | |
4110 | nfsd4_open_deleg_none_ext(open, status); | |
4111 | return; | |
1da177e4 LT |
4112 | } |
4113 | ||
e27f49c3 BH |
4114 | static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, |
4115 | struct nfs4_delegation *dp) | |
4116 | { | |
4117 | if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && | |
4118 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
4119 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
4120 | open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; | |
4121 | } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && | |
4122 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
4123 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
4124 | open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; | |
4125 | } | |
4126 | /* Otherwise the client must be confused wanting a delegation | |
4127 | * it already has, therefore we don't return | |
4128 | * NFS4_OPEN_DELEGATE_NONE_EXT and reason. | |
4129 | */ | |
4130 | } | |
4131 | ||
b37ad28b | 4132 | __be32 |
1da177e4 LT |
4133 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
4134 | { | |
6668958f | 4135 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
38c2f4b1 | 4136 | struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; |
1da177e4 | 4137 | struct nfs4_file *fp = NULL; |
dcef0413 | 4138 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 4139 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 4140 | __be32 status; |
1da177e4 | 4141 | |
1da177e4 LT |
4142 | /* |
4143 | * Lookup file; if found, lookup stateid and check open request, | |
4144 | * and check for delegations in the process of being recalled. | |
4145 | * If not found, create the nfs4_file struct | |
4146 | */ | |
f9c00c3a | 4147 | fp = find_or_add_file(open->op_file, ¤t_fh->fh_handle); |
950e0118 | 4148 | if (fp != open->op_file) { |
41d22663 | 4149 | status = nfs4_check_deleg(cl, open, &dp); |
c44c5eeb N |
4150 | if (status) |
4151 | goto out; | |
a46cb7f2 | 4152 | stp = nfsd4_find_existing_open(fp, open); |
1da177e4 | 4153 | } else { |
950e0118 | 4154 | open->op_file = NULL; |
c44c5eeb | 4155 | status = nfserr_bad_stateid; |
8b289b2c | 4156 | if (nfsd4_is_deleg_cur(open)) |
c44c5eeb | 4157 | goto out; |
1da177e4 LT |
4158 | } |
4159 | ||
4160 | /* | |
4161 | * OPEN the file, or upgrade an existing OPEN. | |
4162 | * If truncate fails, the OPEN fails. | |
4163 | */ | |
4164 | if (stp) { | |
4165 | /* Stateid was found, this is an OPEN upgrade */ | |
f9d7562f | 4166 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
1da177e4 LT |
4167 | if (status) |
4168 | goto out; | |
4169 | } else { | |
4cdc951b BF |
4170 | stp = open->op_stp; |
4171 | open->op_stp = NULL; | |
996e0938 | 4172 | init_open_stateid(stp, fp, open); |
6eb3a1d0 JL |
4173 | status = nfs4_get_vfs_file(rqstp, fp, current_fh, stp, open); |
4174 | if (status) { | |
4175 | release_open_stateid(stp); | |
4176 | goto out; | |
4177 | } | |
8287f009 SB |
4178 | |
4179 | stp->st_clnt_odstate = find_or_hash_clnt_odstate(fp, | |
4180 | open->op_odstate); | |
4181 | if (stp->st_clnt_odstate == open->op_odstate) | |
4182 | open->op_odstate = NULL; | |
1da177e4 | 4183 | } |
dcef0413 BF |
4184 | update_stateid(&stp->st_stid.sc_stateid); |
4185 | memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 4186 | |
d24433cd | 4187 | if (nfsd4_has_session(&resp->cstate)) { |
d24433cd BH |
4188 | if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { |
4189 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
4190 | open->op_why_no_deleg = WND4_NOT_WANTED; | |
4191 | goto nodeleg; | |
4192 | } | |
4193 | } | |
4194 | ||
1da177e4 LT |
4195 | /* |
4196 | * Attempt to hand out a delegation. No error return, because the | |
4197 | * OPEN succeeds even if we fail. | |
4198 | */ | |
4cf59221 | 4199 | nfs4_open_delegation(current_fh, open, stp); |
d24433cd | 4200 | nodeleg: |
1da177e4 LT |
4201 | status = nfs_ok; |
4202 | ||
8c10cbdb | 4203 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
dcef0413 | 4204 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
1da177e4 | 4205 | out: |
d24433cd BH |
4206 | /* 4.1 client trying to upgrade/downgrade delegation? */ |
4207 | if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && | |
e27f49c3 BH |
4208 | open->op_deleg_want) |
4209 | nfsd4_deleg_xgrade_none_ext(open, dp); | |
d24433cd | 4210 | |
13cd2184 N |
4211 | if (fp) |
4212 | put_nfs4_file(fp); | |
37515177 | 4213 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
87186022 | 4214 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
1da177e4 LT |
4215 | /* |
4216 | * To finish the open response, we just need to set the rflags. | |
4217 | */ | |
4218 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
dad1c067 | 4219 | if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && |
6668958f | 4220 | !nfsd4_has_session(&resp->cstate)) |
1da177e4 | 4221 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
dcd94cc2 TM |
4222 | if (dp) |
4223 | nfs4_put_stid(&dp->dl_stid); | |
d6f2bc5d TM |
4224 | if (stp) |
4225 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 LT |
4226 | |
4227 | return status; | |
4228 | } | |
4229 | ||
58fb12e6 | 4230 | void nfsd4_cleanup_open_state(struct nfsd4_compound_state *cstate, |
42297899 | 4231 | struct nfsd4_open *open) |
d29b20cd BF |
4232 | { |
4233 | if (open->op_openowner) { | |
d3134b10 JL |
4234 | struct nfs4_stateowner *so = &open->op_openowner->oo_owner; |
4235 | ||
4236 | nfsd4_cstate_assign_replay(cstate, so); | |
4237 | nfs4_put_stateowner(so); | |
d29b20cd | 4238 | } |
32513b40 | 4239 | if (open->op_file) |
5b095e99 | 4240 | kmem_cache_free(file_slab, open->op_file); |
4cdc951b | 4241 | if (open->op_stp) |
6011695d | 4242 | nfs4_put_stid(&open->op_stp->st_stid); |
8287f009 SB |
4243 | if (open->op_odstate) |
4244 | kmem_cache_free(odstate_slab, open->op_odstate); | |
d29b20cd BF |
4245 | } |
4246 | ||
b37ad28b | 4247 | __be32 |
b591480b BF |
4248 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4249 | clientid_t *clid) | |
1da177e4 LT |
4250 | { |
4251 | struct nfs4_client *clp; | |
b37ad28b | 4252 | __be32 status; |
7f2210fa | 4253 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4254 | |
1da177e4 LT |
4255 | dprintk("process_renew(%08x/%08x): starting\n", |
4256 | clid->cl_boot, clid->cl_id); | |
4b24ca7d | 4257 | status = lookup_clientid(clid, cstate, nn); |
9b2ef62b | 4258 | if (status) |
1da177e4 | 4259 | goto out; |
4b24ca7d | 4260 | clp = cstate->clp; |
1da177e4 | 4261 | status = nfserr_cb_path_down; |
ea1da636 | 4262 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 4263 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
4264 | goto out; |
4265 | status = nfs_ok; | |
4266 | out: | |
1da177e4 LT |
4267 | return status; |
4268 | } | |
4269 | ||
7f5ef2e9 | 4270 | void |
12760c66 | 4271 | nfsd4_end_grace(struct nfsd_net *nn) |
a76b4319 | 4272 | { |
33dcc481 | 4273 | /* do nothing if grace period already ended */ |
a51c84ed | 4274 | if (nn->grace_ended) |
33dcc481 JL |
4275 | return; |
4276 | ||
a76b4319 | 4277 | dprintk("NFSD: end of grace period\n"); |
a51c84ed | 4278 | nn->grace_ended = true; |
70b28235 BF |
4279 | /* |
4280 | * If the server goes down again right now, an NFSv4 | |
4281 | * client will still be allowed to reclaim after it comes back up, | |
4282 | * even if it hasn't yet had a chance to reclaim state this time. | |
4283 | * | |
4284 | */ | |
919b8049 | 4285 | nfsd4_record_grace_done(nn); |
70b28235 BF |
4286 | /* |
4287 | * At this point, NFSv4 clients can still reclaim. But if the | |
4288 | * server crashes, any that have not yet reclaimed will be out | |
4289 | * of luck on the next boot. | |
4290 | * | |
4291 | * (NFSv4.1+ clients are considered to have reclaimed once they | |
4292 | * call RECLAIM_COMPLETE. NFSv4.0 clients are considered to | |
4293 | * have reclaimed after their first OPEN.) | |
4294 | */ | |
5e1533c7 | 4295 | locks_end_grace(&nn->nfsd4_manager); |
70b28235 BF |
4296 | /* |
4297 | * At this point, and once lockd and/or any other containers | |
4298 | * exit their grace period, further reclaims will fail and | |
4299 | * regular locking can resume. | |
4300 | */ | |
a76b4319 N |
4301 | } |
4302 | ||
fd39ca9a | 4303 | static time_t |
09121281 | 4304 | nfs4_laundromat(struct nfsd_net *nn) |
1da177e4 LT |
4305 | { |
4306 | struct nfs4_client *clp; | |
fe0750e5 | 4307 | struct nfs4_openowner *oo; |
1da177e4 | 4308 | struct nfs4_delegation *dp; |
217526e7 | 4309 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4310 | struct list_head *pos, *next, reaplist; |
3d733711 | 4311 | time_t cutoff = get_seconds() - nn->nfsd4_lease; |
a832e7ae | 4312 | time_t t, new_timeo = nn->nfsd4_lease; |
1da177e4 | 4313 | |
1da177e4 | 4314 | dprintk("NFSD: laundromat service - starting\n"); |
12760c66 | 4315 | nfsd4_end_grace(nn); |
36acb66b | 4316 | INIT_LIST_HEAD(&reaplist); |
c9a49628 | 4317 | spin_lock(&nn->client_lock); |
5ed58bb2 | 4318 | list_for_each_safe(pos, next, &nn->client_lru) { |
1da177e4 LT |
4319 | clp = list_entry(pos, struct nfs4_client, cl_lru); |
4320 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
4321 | t = clp->cl_time - cutoff; | |
a832e7ae | 4322 | new_timeo = min(new_timeo, t); |
1da177e4 LT |
4323 | break; |
4324 | } | |
221a6876 | 4325 | if (mark_client_expired_locked(clp)) { |
d7682988 BH |
4326 | dprintk("NFSD: client in use (clientid %08x)\n", |
4327 | clp->cl_clientid.cl_id); | |
4328 | continue; | |
4329 | } | |
4864af97 | 4330 | list_add(&clp->cl_lru, &reaplist); |
36acb66b | 4331 | } |
c9a49628 | 4332 | spin_unlock(&nn->client_lock); |
36acb66b BH |
4333 | list_for_each_safe(pos, next, &reaplist) { |
4334 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
4335 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
4336 | clp->cl_clientid.cl_id); | |
4864af97 | 4337 | list_del_init(&clp->cl_lru); |
1da177e4 LT |
4338 | expire_client(clp); |
4339 | } | |
cdc97505 | 4340 | spin_lock(&state_lock); |
e8c69d17 | 4341 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 LT |
4342 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
4343 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
a832e7ae JL |
4344 | t = dp->dl_time - cutoff; |
4345 | new_timeo = min(new_timeo, t); | |
1da177e4 LT |
4346 | break; |
4347 | } | |
42690676 JL |
4348 | unhash_delegation_locked(dp); |
4349 | list_add(&dp->dl_recall_lru, &reaplist); | |
1da177e4 | 4350 | } |
cdc97505 | 4351 | spin_unlock(&state_lock); |
2d4a532d JL |
4352 | while (!list_empty(&reaplist)) { |
4353 | dp = list_first_entry(&reaplist, struct nfs4_delegation, | |
4354 | dl_recall_lru); | |
4355 | list_del_init(&dp->dl_recall_lru); | |
3bd64a5b | 4356 | revoke_delegation(dp); |
1da177e4 | 4357 | } |
217526e7 JL |
4358 | |
4359 | spin_lock(&nn->client_lock); | |
4360 | while (!list_empty(&nn->close_lru)) { | |
4361 | oo = list_first_entry(&nn->close_lru, struct nfs4_openowner, | |
4362 | oo_close_lru); | |
4363 | if (time_after((unsigned long)oo->oo_time, | |
4364 | (unsigned long)cutoff)) { | |
a832e7ae JL |
4365 | t = oo->oo_time - cutoff; |
4366 | new_timeo = min(new_timeo, t); | |
1da177e4 LT |
4367 | break; |
4368 | } | |
217526e7 JL |
4369 | list_del_init(&oo->oo_close_lru); |
4370 | stp = oo->oo_last_closed_stid; | |
4371 | oo->oo_last_closed_stid = NULL; | |
4372 | spin_unlock(&nn->client_lock); | |
4373 | nfs4_put_stid(&stp->st_stid); | |
4374 | spin_lock(&nn->client_lock); | |
1da177e4 | 4375 | } |
217526e7 JL |
4376 | spin_unlock(&nn->client_lock); |
4377 | ||
a832e7ae | 4378 | new_timeo = max_t(time_t, new_timeo, NFSD_LAUNDROMAT_MINTIMEOUT); |
a832e7ae | 4379 | return new_timeo; |
1da177e4 LT |
4380 | } |
4381 | ||
a254b246 HH |
4382 | static struct workqueue_struct *laundry_wq; |
4383 | static void laundromat_main(struct work_struct *); | |
a254b246 HH |
4384 | |
4385 | static void | |
09121281 | 4386 | laundromat_main(struct work_struct *laundry) |
1da177e4 LT |
4387 | { |
4388 | time_t t; | |
09121281 SK |
4389 | struct delayed_work *dwork = container_of(laundry, struct delayed_work, |
4390 | work); | |
4391 | struct nfsd_net *nn = container_of(dwork, struct nfsd_net, | |
4392 | laundromat_work); | |
1da177e4 | 4393 | |
09121281 | 4394 | t = nfs4_laundromat(nn); |
1da177e4 | 4395 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); |
09121281 | 4396 | queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ); |
1da177e4 LT |
4397 | } |
4398 | ||
8fcd461d | 4399 | static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stid *stp) |
1da177e4 | 4400 | { |
8fcd461d | 4401 | if (!fh_match(&fhp->fh_handle, &stp->sc_file->fi_fhandle)) |
f7a4d872 BF |
4402 | return nfserr_bad_stateid; |
4403 | return nfs_ok; | |
1da177e4 LT |
4404 | } |
4405 | ||
1da177e4 | 4406 | static inline int |
82c5ff1b | 4407 | access_permit_read(struct nfs4_ol_stateid *stp) |
1da177e4 | 4408 | { |
82c5ff1b JL |
4409 | return test_access(NFS4_SHARE_ACCESS_READ, stp) || |
4410 | test_access(NFS4_SHARE_ACCESS_BOTH, stp) || | |
4411 | test_access(NFS4_SHARE_ACCESS_WRITE, stp); | |
1da177e4 LT |
4412 | } |
4413 | ||
4414 | static inline int | |
82c5ff1b | 4415 | access_permit_write(struct nfs4_ol_stateid *stp) |
1da177e4 | 4416 | { |
82c5ff1b JL |
4417 | return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || |
4418 | test_access(NFS4_SHARE_ACCESS_BOTH, stp); | |
1da177e4 LT |
4419 | } |
4420 | ||
4421 | static | |
dcef0413 | 4422 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
1da177e4 | 4423 | { |
b37ad28b | 4424 | __be32 status = nfserr_openmode; |
1da177e4 | 4425 | |
02921914 BF |
4426 | /* For lock stateid's, we test the parent open, not the lock: */ |
4427 | if (stp->st_openstp) | |
4428 | stp = stp->st_openstp; | |
82c5ff1b | 4429 | if ((flags & WR_STATE) && !access_permit_write(stp)) |
1da177e4 | 4430 | goto out; |
82c5ff1b | 4431 | if ((flags & RD_STATE) && !access_permit_read(stp)) |
1da177e4 LT |
4432 | goto out; |
4433 | status = nfs_ok; | |
4434 | out: | |
4435 | return status; | |
4436 | } | |
4437 | ||
b37ad28b | 4438 | static inline __be32 |
5ccb0066 | 4439 | check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags) |
1da177e4 | 4440 | { |
203a8c8e | 4441 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 4442 | return nfs_ok; |
5ccb0066 | 4443 | else if (locks_in_grace(net)) { |
25985edc | 4444 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
4445 | * conflicting state; so we must wait out the grace period. */ |
4446 | return nfserr_grace; | |
4447 | } else if (flags & WR_STATE) | |
4448 | return nfs4_share_conflict(current_fh, | |
4449 | NFS4_SHARE_DENY_WRITE); | |
4450 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
4451 | return nfs4_share_conflict(current_fh, | |
4452 | NFS4_SHARE_DENY_READ); | |
4453 | } | |
4454 | ||
4455 | /* | |
4456 | * Allow READ/WRITE during grace period on recovered state only for files | |
4457 | * that are not able to provide mandatory locking. | |
4458 | */ | |
4459 | static inline int | |
5ccb0066 | 4460 | grace_disallows_io(struct net *net, struct inode *inode) |
1da177e4 | 4461 | { |
5ccb0066 | 4462 | return locks_in_grace(net) && mandatory_lock(inode); |
1da177e4 LT |
4463 | } |
4464 | ||
81b82965 BF |
4465 | /* Returns true iff a is later than b: */ |
4466 | static bool stateid_generation_after(stateid_t *a, stateid_t *b) | |
4467 | { | |
1a9357f4 | 4468 | return (s32)(a->si_generation - b->si_generation) > 0; |
81b82965 BF |
4469 | } |
4470 | ||
57b7b43b | 4471 | static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 4472 | { |
6668958f AA |
4473 | /* |
4474 | * When sessions are used the stateid generation number is ignored | |
4475 | * when it is zero. | |
4476 | */ | |
28dde241 | 4477 | if (has_session && in->si_generation == 0) |
81b82965 BF |
4478 | return nfs_ok; |
4479 | ||
4480 | if (in->si_generation == ref->si_generation) | |
4481 | return nfs_ok; | |
6668958f | 4482 | |
0836f587 | 4483 | /* If the client sends us a stateid from the future, it's buggy: */ |
81b82965 | 4484 | if (stateid_generation_after(in, ref)) |
0836f587 BF |
4485 | return nfserr_bad_stateid; |
4486 | /* | |
81b82965 BF |
4487 | * However, we could see a stateid from the past, even from a |
4488 | * non-buggy client. For example, if the client sends a lock | |
4489 | * while some IO is outstanding, the lock may bump si_generation | |
4490 | * while the IO is still in flight. The client could avoid that | |
4491 | * situation by waiting for responses on all the IO requests, | |
4492 | * but better performance may result in retrying IO that | |
4493 | * receives an old_stateid error if requests are rarely | |
4494 | * reordered in flight: | |
0836f587 | 4495 | */ |
81b82965 | 4496 | return nfserr_old_stateid; |
0836f587 BF |
4497 | } |
4498 | ||
ebe9cb3b CH |
4499 | static __be32 nfsd4_check_openowner_confirmed(struct nfs4_ol_stateid *ols) |
4500 | { | |
4501 | if (ols->st_stateowner->so_is_open_owner && | |
4502 | !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) | |
4503 | return nfserr_bad_stateid; | |
4504 | return nfs_ok; | |
4505 | } | |
4506 | ||
7df302f7 | 4507 | static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) |
17456804 | 4508 | { |
97b7e3b6 | 4509 | struct nfs4_stid *s; |
1af71cc8 | 4510 | __be32 status = nfserr_bad_stateid; |
17456804 | 4511 | |
7df302f7 | 4512 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
1af71cc8 | 4513 | return status; |
7df302f7 CL |
4514 | /* Client debugging aid. */ |
4515 | if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) { | |
4516 | char addr_str[INET6_ADDRSTRLEN]; | |
4517 | rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str, | |
4518 | sizeof(addr_str)); | |
4519 | pr_warn_ratelimited("NFSD: client %s testing state ID " | |
4520 | "with incorrect client ID\n", addr_str); | |
1af71cc8 | 4521 | return status; |
7df302f7 | 4522 | } |
1af71cc8 JL |
4523 | spin_lock(&cl->cl_lock); |
4524 | s = find_stateid_locked(cl, stateid); | |
97b7e3b6 | 4525 | if (!s) |
1af71cc8 | 4526 | goto out_unlock; |
36279ac1 | 4527 | status = check_stateid_generation(stateid, &s->sc_stateid, 1); |
17456804 | 4528 | if (status) |
1af71cc8 | 4529 | goto out_unlock; |
23340032 BF |
4530 | switch (s->sc_type) { |
4531 | case NFS4_DELEG_STID: | |
1af71cc8 JL |
4532 | status = nfs_ok; |
4533 | break; | |
3bd64a5b | 4534 | case NFS4_REVOKED_DELEG_STID: |
1af71cc8 JL |
4535 | status = nfserr_deleg_revoked; |
4536 | break; | |
23340032 BF |
4537 | case NFS4_OPEN_STID: |
4538 | case NFS4_LOCK_STID: | |
ebe9cb3b | 4539 | status = nfsd4_check_openowner_confirmed(openlockstateid(s)); |
1af71cc8 | 4540 | break; |
23340032 BF |
4541 | default: |
4542 | printk("unknown stateid type %x\n", s->sc_type); | |
b0fc29d6 | 4543 | /* Fallthrough */ |
23340032 | 4544 | case NFS4_CLOSED_STID: |
b0fc29d6 | 4545 | case NFS4_CLOSED_DELEG_STID: |
1af71cc8 | 4546 | status = nfserr_bad_stateid; |
23340032 | 4547 | } |
1af71cc8 JL |
4548 | out_unlock: |
4549 | spin_unlock(&cl->cl_lock); | |
4550 | return status; | |
17456804 BS |
4551 | } |
4552 | ||
cd61c522 | 4553 | __be32 |
2dd6e458 TM |
4554 | nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate, |
4555 | stateid_t *stateid, unsigned char typemask, | |
4556 | struct nfs4_stid **s, struct nfsd_net *nn) | |
38c2f4b1 | 4557 | { |
0eb6f20a | 4558 | __be32 status; |
38c2f4b1 BF |
4559 | |
4560 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
4561 | return nfserr_bad_stateid; | |
4b24ca7d | 4562 | status = lookup_clientid(&stateid->si_opaque.so_clid, cstate, nn); |
a8a7c677 | 4563 | if (status == nfserr_stale_clientid) { |
4b24ca7d | 4564 | if (cstate->session) |
a8a7c677 | 4565 | return nfserr_bad_stateid; |
38c2f4b1 | 4566 | return nfserr_stale_stateid; |
a8a7c677 | 4567 | } |
0eb6f20a BF |
4568 | if (status) |
4569 | return status; | |
4b24ca7d | 4570 | *s = find_stateid_by_type(cstate->clp, stateid, typemask); |
38c2f4b1 BF |
4571 | if (!*s) |
4572 | return nfserr_bad_stateid; | |
4573 | return nfs_ok; | |
38c2f4b1 BF |
4574 | } |
4575 | ||
a0649b2d CH |
4576 | static struct file * |
4577 | nfs4_find_file(struct nfs4_stid *s, int flags) | |
4578 | { | |
af90f707 CH |
4579 | if (!s) |
4580 | return NULL; | |
4581 | ||
a0649b2d CH |
4582 | switch (s->sc_type) { |
4583 | case NFS4_DELEG_STID: | |
4584 | if (WARN_ON_ONCE(!s->sc_file->fi_deleg_file)) | |
4585 | return NULL; | |
4586 | return get_file(s->sc_file->fi_deleg_file); | |
4587 | case NFS4_OPEN_STID: | |
4588 | case NFS4_LOCK_STID: | |
4589 | if (flags & RD_STATE) | |
4590 | return find_readable_file(s->sc_file); | |
4591 | else | |
4592 | return find_writeable_file(s->sc_file); | |
4593 | break; | |
4594 | } | |
4595 | ||
4596 | return NULL; | |
4597 | } | |
4598 | ||
4599 | static __be32 | |
4600 | nfs4_check_olstateid(struct svc_fh *fhp, struct nfs4_ol_stateid *ols, int flags) | |
4601 | { | |
4602 | __be32 status; | |
4603 | ||
a0649b2d CH |
4604 | status = nfsd4_check_openowner_confirmed(ols); |
4605 | if (status) | |
4606 | return status; | |
4607 | return nfs4_check_openmode(ols, flags); | |
4608 | } | |
4609 | ||
af90f707 CH |
4610 | static __be32 |
4611 | nfs4_check_file(struct svc_rqst *rqstp, struct svc_fh *fhp, struct nfs4_stid *s, | |
4612 | struct file **filpp, bool *tmp_file, int flags) | |
4613 | { | |
4614 | int acc = (flags & RD_STATE) ? NFSD_MAY_READ : NFSD_MAY_WRITE; | |
4615 | struct file *file; | |
4616 | __be32 status; | |
4617 | ||
4618 | file = nfs4_find_file(s, flags); | |
4619 | if (file) { | |
4620 | status = nfsd_permission(rqstp, fhp->fh_export, fhp->fh_dentry, | |
4621 | acc | NFSD_MAY_OWNER_OVERRIDE); | |
4622 | if (status) { | |
4623 | fput(file); | |
4624 | return status; | |
4625 | } | |
4626 | ||
4627 | *filpp = file; | |
4628 | } else { | |
4629 | status = nfsd_open(rqstp, fhp, S_IFREG, acc, filpp); | |
4630 | if (status) | |
4631 | return status; | |
4632 | ||
4633 | if (tmp_file) | |
4634 | *tmp_file = true; | |
4635 | } | |
4636 | ||
4637 | return 0; | |
4638 | } | |
4639 | ||
1da177e4 | 4640 | /* |
a0649b2d CH |
4641 | * Checks for stateid operations |
4642 | */ | |
b37ad28b | 4643 | __be32 |
af90f707 CH |
4644 | nfs4_preprocess_stateid_op(struct svc_rqst *rqstp, |
4645 | struct nfsd4_compound_state *cstate, stateid_t *stateid, | |
4646 | int flags, struct file **filpp, bool *tmp_file) | |
1da177e4 | 4647 | { |
a0649b2d CH |
4648 | struct svc_fh *fhp = &cstate->current_fh; |
4649 | struct inode *ino = d_inode(fhp->fh_dentry); | |
af90f707 | 4650 | struct net *net = SVC_NET(rqstp); |
3320fef1 | 4651 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
af90f707 | 4652 | struct nfs4_stid *s = NULL; |
b37ad28b | 4653 | __be32 status; |
1da177e4 | 4654 | |
1da177e4 LT |
4655 | if (filpp) |
4656 | *filpp = NULL; | |
af90f707 CH |
4657 | if (tmp_file) |
4658 | *tmp_file = false; | |
1da177e4 | 4659 | |
5ccb0066 | 4660 | if (grace_disallows_io(net, ino)) |
1da177e4 LT |
4661 | return nfserr_grace; |
4662 | ||
af90f707 CH |
4663 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { |
4664 | status = check_special_stateids(net, fhp, stateid, flags); | |
4665 | goto done; | |
4666 | } | |
1da177e4 | 4667 | |
2dd6e458 | 4668 | status = nfsd4_lookup_stateid(cstate, stateid, |
db24b3b4 | 4669 | NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, |
2dd6e458 | 4670 | &s, nn); |
38c2f4b1 | 4671 | if (status) |
c2d1d6a8 | 4672 | return status; |
a0649b2d CH |
4673 | status = check_stateid_generation(stateid, &s->sc_stateid, |
4674 | nfsd4_has_session(cstate)); | |
69064a27 BF |
4675 | if (status) |
4676 | goto out; | |
a0649b2d | 4677 | |
f7a4d872 BF |
4678 | switch (s->sc_type) { |
4679 | case NFS4_DELEG_STID: | |
a0649b2d | 4680 | status = nfs4_check_delegmode(delegstateid(s), flags); |
f7a4d872 BF |
4681 | break; |
4682 | case NFS4_OPEN_STID: | |
4683 | case NFS4_LOCK_STID: | |
a0649b2d | 4684 | status = nfs4_check_olstateid(fhp, openlockstateid(s), flags); |
f7a4d872 BF |
4685 | break; |
4686 | default: | |
14bcab1a | 4687 | status = nfserr_bad_stateid; |
a0649b2d CH |
4688 | break; |
4689 | } | |
8fcd461d JL |
4690 | if (status) |
4691 | goto out; | |
4692 | status = nfs4_check_fh(fhp, s); | |
a0649b2d | 4693 | |
af90f707 CH |
4694 | done: |
4695 | if (!status && filpp) | |
4696 | status = nfs4_check_file(rqstp, fhp, s, filpp, tmp_file, flags); | |
1da177e4 | 4697 | out: |
af90f707 CH |
4698 | if (s) |
4699 | nfs4_put_stid(s); | |
1da177e4 LT |
4700 | return status; |
4701 | } | |
4702 | ||
17456804 BS |
4703 | /* |
4704 | * Test if the stateid is valid | |
4705 | */ | |
4706 | __be32 | |
4707 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
4708 | struct nfsd4_test_stateid *test_stateid) | |
4709 | { | |
03cfb420 BS |
4710 | struct nfsd4_test_stateid_id *stateid; |
4711 | struct nfs4_client *cl = cstate->session->se_client; | |
4712 | ||
03cfb420 | 4713 | list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) |
7df302f7 CL |
4714 | stateid->ts_id_status = |
4715 | nfsd4_validate_stateid(cl, &stateid->ts_id_stateid); | |
03cfb420 | 4716 | |
17456804 BS |
4717 | return nfs_ok; |
4718 | } | |
4719 | ||
e1ca12df BS |
4720 | __be32 |
4721 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
4722 | struct nfsd4_free_stateid *free_stateid) | |
4723 | { | |
4724 | stateid_t *stateid = &free_stateid->fr_stateid; | |
2da1cec7 | 4725 | struct nfs4_stid *s; |
3bd64a5b | 4726 | struct nfs4_delegation *dp; |
fc5a96c3 | 4727 | struct nfs4_ol_stateid *stp; |
38c2f4b1 | 4728 | struct nfs4_client *cl = cstate->session->se_client; |
2da1cec7 | 4729 | __be32 ret = nfserr_bad_stateid; |
e1ca12df | 4730 | |
1af71cc8 JL |
4731 | spin_lock(&cl->cl_lock); |
4732 | s = find_stateid_locked(cl, stateid); | |
2da1cec7 | 4733 | if (!s) |
1af71cc8 | 4734 | goto out_unlock; |
2da1cec7 BF |
4735 | switch (s->sc_type) { |
4736 | case NFS4_DELEG_STID: | |
e1ca12df | 4737 | ret = nfserr_locks_held; |
1af71cc8 | 4738 | break; |
2da1cec7 | 4739 | case NFS4_OPEN_STID: |
2da1cec7 BF |
4740 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); |
4741 | if (ret) | |
1af71cc8 JL |
4742 | break; |
4743 | ret = nfserr_locks_held; | |
f7a4d872 | 4744 | break; |
1af71cc8 JL |
4745 | case NFS4_LOCK_STID: |
4746 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); | |
4747 | if (ret) | |
4748 | break; | |
fc5a96c3 JL |
4749 | stp = openlockstateid(s); |
4750 | ret = nfserr_locks_held; | |
4751 | if (check_for_locks(stp->st_stid.sc_file, | |
4752 | lockowner(stp->st_stateowner))) | |
4753 | break; | |
4754 | unhash_lock_stateid(stp); | |
1af71cc8 | 4755 | spin_unlock(&cl->cl_lock); |
fc5a96c3 JL |
4756 | nfs4_put_stid(s); |
4757 | ret = nfs_ok; | |
1af71cc8 | 4758 | goto out; |
3bd64a5b BF |
4759 | case NFS4_REVOKED_DELEG_STID: |
4760 | dp = delegstateid(s); | |
2d4a532d JL |
4761 | list_del_init(&dp->dl_recall_lru); |
4762 | spin_unlock(&cl->cl_lock); | |
6011695d | 4763 | nfs4_put_stid(s); |
3bd64a5b | 4764 | ret = nfs_ok; |
1af71cc8 JL |
4765 | goto out; |
4766 | /* Default falls through and returns nfserr_bad_stateid */ | |
e1ca12df | 4767 | } |
1af71cc8 JL |
4768 | out_unlock: |
4769 | spin_unlock(&cl->cl_lock); | |
e1ca12df | 4770 | out: |
e1ca12df BS |
4771 | return ret; |
4772 | } | |
4773 | ||
4c4cd222 N |
4774 | static inline int |
4775 | setlkflg (int type) | |
4776 | { | |
4777 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
4778 | RD_STATE : WR_STATE; | |
4779 | } | |
1da177e4 | 4780 | |
dcef0413 | 4781 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
c0a5d93e BF |
4782 | { |
4783 | struct svc_fh *current_fh = &cstate->current_fh; | |
4784 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
4785 | __be32 status; | |
4786 | ||
c0a5d93e BF |
4787 | status = nfsd4_check_seqid(cstate, sop, seqid); |
4788 | if (status) | |
4789 | return status; | |
3bd64a5b BF |
4790 | if (stp->st_stid.sc_type == NFS4_CLOSED_STID |
4791 | || stp->st_stid.sc_type == NFS4_REVOKED_DELEG_STID) | |
f7a4d872 BF |
4792 | /* |
4793 | * "Closed" stateid's exist *only* to return | |
3bd64a5b BF |
4794 | * nfserr_replay_me from the previous step, and |
4795 | * revoked delegations are kept only for free_stateid. | |
f7a4d872 BF |
4796 | */ |
4797 | return nfserr_bad_stateid; | |
4798 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); | |
4799 | if (status) | |
4800 | return status; | |
8fcd461d | 4801 | return nfs4_check_fh(current_fh, &stp->st_stid); |
c0a5d93e BF |
4802 | } |
4803 | ||
1da177e4 LT |
4804 | /* |
4805 | * Checks for sequence id mutating operations. | |
4806 | */ | |
b37ad28b | 4807 | static __be32 |
dd453dfd | 4808 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2288d0e3 | 4809 | stateid_t *stateid, char typemask, |
3320fef1 SK |
4810 | struct nfs4_ol_stateid **stpp, |
4811 | struct nfsd_net *nn) | |
1da177e4 | 4812 | { |
0836f587 | 4813 | __be32 status; |
38c2f4b1 | 4814 | struct nfs4_stid *s; |
e17f99b7 | 4815 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 4816 | |
8c10cbdb BH |
4817 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
4818 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 4819 | |
1da177e4 | 4820 | *stpp = NULL; |
2dd6e458 | 4821 | status = nfsd4_lookup_stateid(cstate, stateid, typemask, &s, nn); |
c0a5d93e BF |
4822 | if (status) |
4823 | return status; | |
e17f99b7 | 4824 | stp = openlockstateid(s); |
58fb12e6 | 4825 | nfsd4_cstate_assign_replay(cstate, stp->st_stateowner); |
1da177e4 | 4826 | |
e17f99b7 | 4827 | status = nfs4_seqid_op_checks(cstate, stateid, seqid, stp); |
fd911011 | 4828 | if (!status) |
e17f99b7 | 4829 | *stpp = stp; |
fd911011 TM |
4830 | else |
4831 | nfs4_put_stid(&stp->st_stid); | |
e17f99b7 | 4832 | return status; |
c0a5d93e | 4833 | } |
39325bd0 | 4834 | |
3320fef1 SK |
4835 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
4836 | stateid_t *stateid, struct nfs4_ol_stateid **stpp, struct nfsd_net *nn) | |
c0a5d93e BF |
4837 | { |
4838 | __be32 status; | |
4839 | struct nfs4_openowner *oo; | |
4cbfc9f7 | 4840 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4841 | |
c0a5d93e | 4842 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
4cbfc9f7 | 4843 | NFS4_OPEN_STID, &stp, nn); |
7a8711c9 BF |
4844 | if (status) |
4845 | return status; | |
4cbfc9f7 TM |
4846 | oo = openowner(stp->st_stateowner); |
4847 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { | |
4848 | nfs4_put_stid(&stp->st_stid); | |
3a4f98bb | 4849 | return nfserr_bad_stateid; |
4cbfc9f7 TM |
4850 | } |
4851 | *stpp = stp; | |
3a4f98bb | 4852 | return nfs_ok; |
1da177e4 LT |
4853 | } |
4854 | ||
b37ad28b | 4855 | __be32 |
ca364317 | 4856 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4857 | struct nfsd4_open_confirm *oc) |
1da177e4 | 4858 | { |
b37ad28b | 4859 | __be32 status; |
fe0750e5 | 4860 | struct nfs4_openowner *oo; |
dcef0413 | 4861 | struct nfs4_ol_stateid *stp; |
3320fef1 | 4862 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4863 | |
a6a9f18f AV |
4864 | dprintk("NFSD: nfsd4_open_confirm on file %pd\n", |
4865 | cstate->current_fh.fh_dentry); | |
1da177e4 | 4866 | |
ca364317 | 4867 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
4868 | if (status) |
4869 | return status; | |
1da177e4 | 4870 | |
9072d5c6 | 4871 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 4872 | oc->oc_seqid, &oc->oc_req_stateid, |
3320fef1 | 4873 | NFS4_OPEN_STID, &stp, nn); |
9072d5c6 | 4874 | if (status) |
68b66e82 | 4875 | goto out; |
fe0750e5 | 4876 | oo = openowner(stp->st_stateowner); |
68b66e82 | 4877 | status = nfserr_bad_stateid; |
dad1c067 | 4878 | if (oo->oo_flags & NFS4_OO_CONFIRMED) |
2585fc79 | 4879 | goto put_stateid; |
dad1c067 | 4880 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
dcef0413 BF |
4881 | update_stateid(&stp->st_stid.sc_stateid); |
4882 | memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
8c10cbdb | 4883 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
dcef0413 | 4884 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); |
c7b9a459 | 4885 | |
2a4317c5 | 4886 | nfsd4_client_record_create(oo->oo_owner.so_client); |
68b66e82 | 4887 | status = nfs_ok; |
2585fc79 TM |
4888 | put_stateid: |
4889 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 4890 | out: |
9411b1d4 | 4891 | nfsd4_bump_seqid(cstate, status); |
1da177e4 LT |
4892 | return status; |
4893 | } | |
4894 | ||
6409a5a6 | 4895 | static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) |
1da177e4 | 4896 | { |
82c5ff1b | 4897 | if (!test_access(access, stp)) |
6409a5a6 | 4898 | return; |
11b9164a | 4899 | nfs4_file_put_access(stp->st_stid.sc_file, access); |
82c5ff1b | 4900 | clear_access(access, stp); |
6409a5a6 | 4901 | } |
f197c271 | 4902 | |
6409a5a6 BF |
4903 | static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) |
4904 | { | |
4905 | switch (to_access) { | |
4906 | case NFS4_SHARE_ACCESS_READ: | |
4907 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); | |
4908 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
4909 | break; | |
4910 | case NFS4_SHARE_ACCESS_WRITE: | |
4911 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); | |
4912 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
4913 | break; | |
4914 | case NFS4_SHARE_ACCESS_BOTH: | |
4915 | break; | |
4916 | default: | |
063b0fb9 | 4917 | WARN_ON_ONCE(1); |
1da177e4 LT |
4918 | } |
4919 | } | |
4920 | ||
b37ad28b | 4921 | __be32 |
ca364317 BF |
4922 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
4923 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 4924 | struct nfsd4_open_downgrade *od) |
1da177e4 | 4925 | { |
b37ad28b | 4926 | __be32 status; |
dcef0413 | 4927 | struct nfs4_ol_stateid *stp; |
3320fef1 | 4928 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4929 | |
a6a9f18f AV |
4930 | dprintk("NFSD: nfsd4_open_downgrade on file %pd\n", |
4931 | cstate->current_fh.fh_dentry); | |
1da177e4 | 4932 | |
c30e92df | 4933 | /* We don't yet support WANT bits: */ |
2c8bd7e0 BH |
4934 | if (od->od_deleg_want) |
4935 | dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, | |
4936 | od->od_deleg_want); | |
1da177e4 | 4937 | |
c0a5d93e | 4938 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
3320fef1 | 4939 | &od->od_stateid, &stp, nn); |
9072d5c6 | 4940 | if (status) |
1da177e4 | 4941 | goto out; |
1da177e4 | 4942 | status = nfserr_inval; |
82c5ff1b | 4943 | if (!test_access(od->od_share_access, stp)) { |
c11c591f | 4944 | dprintk("NFSD: access not a subset of current bitmap: 0x%hhx, input access=%08x\n", |
1da177e4 | 4945 | stp->st_access_bmap, od->od_share_access); |
0667b1e9 | 4946 | goto put_stateid; |
1da177e4 | 4947 | } |
ce0fc43c | 4948 | if (!test_deny(od->od_share_deny, stp)) { |
c11c591f | 4949 | dprintk("NFSD: deny not a subset of current bitmap: 0x%hhx, input deny=%08x\n", |
1da177e4 | 4950 | stp->st_deny_bmap, od->od_share_deny); |
0667b1e9 | 4951 | goto put_stateid; |
1da177e4 | 4952 | } |
6409a5a6 | 4953 | nfs4_stateid_downgrade(stp, od->od_share_access); |
1da177e4 | 4954 | |
ce0fc43c | 4955 | reset_union_bmap_deny(od->od_share_deny, stp); |
1da177e4 | 4956 | |
dcef0413 BF |
4957 | update_stateid(&stp->st_stid.sc_stateid); |
4958 | memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 4959 | status = nfs_ok; |
0667b1e9 TM |
4960 | put_stateid: |
4961 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 4962 | out: |
9411b1d4 | 4963 | nfsd4_bump_seqid(cstate, status); |
1da177e4 LT |
4964 | return status; |
4965 | } | |
4966 | ||
f7a4d872 BF |
4967 | static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) |
4968 | { | |
acf9295b | 4969 | struct nfs4_client *clp = s->st_stid.sc_client; |
d83017f9 | 4970 | LIST_HEAD(reaplist); |
acf9295b | 4971 | |
f7a4d872 | 4972 | s->st_stid.sc_type = NFS4_CLOSED_STID; |
2c41beb0 | 4973 | spin_lock(&clp->cl_lock); |
d83017f9 | 4974 | unhash_open_stateid(s, &reaplist); |
acf9295b | 4975 | |
d83017f9 JL |
4976 | if (clp->cl_minorversion) { |
4977 | put_ol_stateid_locked(s, &reaplist); | |
4978 | spin_unlock(&clp->cl_lock); | |
4979 | free_ol_stateid_reaplist(&reaplist); | |
4980 | } else { | |
4981 | spin_unlock(&clp->cl_lock); | |
4982 | free_ol_stateid_reaplist(&reaplist); | |
d3134b10 | 4983 | move_to_close_lru(s, clp->net); |
d83017f9 | 4984 | } |
38c387b5 BF |
4985 | } |
4986 | ||
1da177e4 LT |
4987 | /* |
4988 | * nfs4_unlock_state() called after encode | |
4989 | */ | |
b37ad28b | 4990 | __be32 |
ca364317 | 4991 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4992 | struct nfsd4_close *close) |
1da177e4 | 4993 | { |
b37ad28b | 4994 | __be32 status; |
dcef0413 | 4995 | struct nfs4_ol_stateid *stp; |
3320fef1 SK |
4996 | struct net *net = SVC_NET(rqstp); |
4997 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 | 4998 | |
a6a9f18f AV |
4999 | dprintk("NFSD: nfsd4_close on file %pd\n", |
5000 | cstate->current_fh.fh_dentry); | |
1da177e4 | 5001 | |
f7a4d872 BF |
5002 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
5003 | &close->cl_stateid, | |
5004 | NFS4_OPEN_STID|NFS4_CLOSED_STID, | |
3320fef1 | 5005 | &stp, nn); |
9411b1d4 | 5006 | nfsd4_bump_seqid(cstate, status); |
9072d5c6 | 5007 | if (status) |
1da177e4 | 5008 | goto out; |
dcef0413 BF |
5009 | update_stateid(&stp->st_stid.sc_stateid); |
5010 | memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 5011 | |
f7a4d872 | 5012 | nfsd4_close_open_stateid(stp); |
8a0b589d TM |
5013 | |
5014 | /* put reference from nfs4_preprocess_seqid_op */ | |
5015 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 5016 | out: |
1da177e4 LT |
5017 | return status; |
5018 | } | |
5019 | ||
b37ad28b | 5020 | __be32 |
ca364317 BF |
5021 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
5022 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 5023 | { |
203a8c8e BF |
5024 | struct nfs4_delegation *dp; |
5025 | stateid_t *stateid = &dr->dr_stateid; | |
38c2f4b1 | 5026 | struct nfs4_stid *s; |
b37ad28b | 5027 | __be32 status; |
3320fef1 | 5028 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 5029 | |
ca364317 | 5030 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e | 5031 | return status; |
1da177e4 | 5032 | |
2dd6e458 | 5033 | status = nfsd4_lookup_stateid(cstate, stateid, NFS4_DELEG_STID, &s, nn); |
38c2f4b1 | 5034 | if (status) |
203a8c8e | 5035 | goto out; |
38c2f4b1 | 5036 | dp = delegstateid(s); |
d5477a8d | 5037 | status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); |
203a8c8e | 5038 | if (status) |
fd911011 | 5039 | goto put_stateid; |
203a8c8e | 5040 | |
3bd64a5b | 5041 | destroy_delegation(dp); |
fd911011 TM |
5042 | put_stateid: |
5043 | nfs4_put_stid(&dp->dl_stid); | |
1da177e4 LT |
5044 | out: |
5045 | return status; | |
5046 | } | |
5047 | ||
87df4de8 BH |
5048 | static inline u64 |
5049 | end_offset(u64 start, u64 len) | |
5050 | { | |
5051 | u64 end; | |
5052 | ||
5053 | end = start + len; | |
5054 | return end >= start ? end: NFS4_MAX_UINT64; | |
5055 | } | |
5056 | ||
5057 | /* last octet in a range */ | |
5058 | static inline u64 | |
5059 | last_byte_offset(u64 start, u64 len) | |
5060 | { | |
5061 | u64 end; | |
5062 | ||
063b0fb9 | 5063 | WARN_ON_ONCE(!len); |
87df4de8 BH |
5064 | end = start + len; |
5065 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
5066 | } | |
5067 | ||
1da177e4 LT |
5068 | /* |
5069 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
5070 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
5071 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
5072 | * locking, this prevents us from being completely protocol-compliant. The | |
5073 | * real solution to this problem is to start using unsigned file offsets in | |
5074 | * the VFS, but this is a very deep change! | |
5075 | */ | |
5076 | static inline void | |
5077 | nfs4_transform_lock_offset(struct file_lock *lock) | |
5078 | { | |
5079 | if (lock->fl_start < 0) | |
5080 | lock->fl_start = OFFSET_MAX; | |
5081 | if (lock->fl_end < 0) | |
5082 | lock->fl_end = OFFSET_MAX; | |
5083 | } | |
5084 | ||
cae80b30 JL |
5085 | static fl_owner_t |
5086 | nfsd4_fl_get_owner(fl_owner_t owner) | |
aef9583b | 5087 | { |
cae80b30 JL |
5088 | struct nfs4_lockowner *lo = (struct nfs4_lockowner *)owner; |
5089 | ||
5090 | nfs4_get_stateowner(&lo->lo_owner); | |
5091 | return owner; | |
aef9583b KM |
5092 | } |
5093 | ||
cae80b30 JL |
5094 | static void |
5095 | nfsd4_fl_put_owner(fl_owner_t owner) | |
aef9583b | 5096 | { |
cae80b30 | 5097 | struct nfs4_lockowner *lo = (struct nfs4_lockowner *)owner; |
aef9583b | 5098 | |
cae80b30 | 5099 | if (lo) |
aef9583b | 5100 | nfs4_put_stateowner(&lo->lo_owner); |
aef9583b KM |
5101 | } |
5102 | ||
7b021967 | 5103 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
aef9583b KM |
5104 | .lm_get_owner = nfsd4_fl_get_owner, |
5105 | .lm_put_owner = nfsd4_fl_put_owner, | |
d5b9026a | 5106 | }; |
1da177e4 LT |
5107 | |
5108 | static inline void | |
5109 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
5110 | { | |
fe0750e5 | 5111 | struct nfs4_lockowner *lo; |
1da177e4 | 5112 | |
d5b9026a | 5113 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 BF |
5114 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
5115 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, | |
5116 | lo->lo_owner.so_owner.len, GFP_KERNEL); | |
7c13f344 BF |
5117 | if (!deny->ld_owner.data) |
5118 | /* We just don't care that much */ | |
5119 | goto nevermind; | |
fe0750e5 BF |
5120 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
5121 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; | |
d5b9026a | 5122 | } else { |
7c13f344 BF |
5123 | nevermind: |
5124 | deny->ld_owner.len = 0; | |
5125 | deny->ld_owner.data = NULL; | |
d5b9026a N |
5126 | deny->ld_clientid.cl_boot = 0; |
5127 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
5128 | } |
5129 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
5130 | deny->ld_length = NFS4_MAX_UINT64; |
5131 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
5132 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
5133 | deny->ld_type = NFS4_READ_LT; | |
5134 | if (fl->fl_type != F_RDLCK) | |
5135 | deny->ld_type = NFS4_WRITE_LT; | |
5136 | } | |
5137 | ||
fe0750e5 | 5138 | static struct nfs4_lockowner * |
c8623999 | 5139 | find_lockowner_str_locked(struct nfs4_client *clp, struct xdr_netobj *owner) |
1da177e4 | 5140 | { |
d4f0489f | 5141 | unsigned int strhashval = ownerstr_hashval(owner); |
b3c32bcd | 5142 | struct nfs4_stateowner *so; |
1da177e4 | 5143 | |
0a880a28 TM |
5144 | lockdep_assert_held(&clp->cl_lock); |
5145 | ||
d4f0489f TM |
5146 | list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[strhashval], |
5147 | so_strhash) { | |
b3c32bcd TM |
5148 | if (so->so_is_open_owner) |
5149 | continue; | |
b5971afa KM |
5150 | if (same_owner_str(so, owner)) |
5151 | return lockowner(nfs4_get_stateowner(so)); | |
1da177e4 LT |
5152 | } |
5153 | return NULL; | |
5154 | } | |
5155 | ||
c58c6610 | 5156 | static struct nfs4_lockowner * |
c8623999 | 5157 | find_lockowner_str(struct nfs4_client *clp, struct xdr_netobj *owner) |
c58c6610 TM |
5158 | { |
5159 | struct nfs4_lockowner *lo; | |
5160 | ||
d4f0489f | 5161 | spin_lock(&clp->cl_lock); |
c8623999 | 5162 | lo = find_lockowner_str_locked(clp, owner); |
d4f0489f | 5163 | spin_unlock(&clp->cl_lock); |
c58c6610 TM |
5164 | return lo; |
5165 | } | |
5166 | ||
8f4b54c5 JL |
5167 | static void nfs4_unhash_lockowner(struct nfs4_stateowner *sop) |
5168 | { | |
c58c6610 | 5169 | unhash_lockowner_locked(lockowner(sop)); |
8f4b54c5 JL |
5170 | } |
5171 | ||
6b180f0b JL |
5172 | static void nfs4_free_lockowner(struct nfs4_stateowner *sop) |
5173 | { | |
5174 | struct nfs4_lockowner *lo = lockowner(sop); | |
5175 | ||
5176 | kmem_cache_free(lockowner_slab, lo); | |
5177 | } | |
5178 | ||
5179 | static const struct nfs4_stateowner_operations lockowner_ops = { | |
8f4b54c5 JL |
5180 | .so_unhash = nfs4_unhash_lockowner, |
5181 | .so_free = nfs4_free_lockowner, | |
6b180f0b JL |
5182 | }; |
5183 | ||
1da177e4 LT |
5184 | /* |
5185 | * Alloc a lock owner structure. | |
5186 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 5187 | * occurred. |
1da177e4 | 5188 | * |
16bfdaaf | 5189 | * strhashval = ownerstr_hashval |
1da177e4 | 5190 | */ |
fe0750e5 | 5191 | static struct nfs4_lockowner * |
c58c6610 TM |
5192 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, |
5193 | struct nfs4_ol_stateid *open_stp, | |
5194 | struct nfsd4_lock *lock) | |
5195 | { | |
c58c6610 | 5196 | struct nfs4_lockowner *lo, *ret; |
1da177e4 | 5197 | |
fe0750e5 BF |
5198 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
5199 | if (!lo) | |
1da177e4 | 5200 | return NULL; |
fe0750e5 BF |
5201 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
5202 | lo->lo_owner.so_is_open_owner = 0; | |
5db1c03f | 5203 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid; |
6b180f0b | 5204 | lo->lo_owner.so_ops = &lockowner_ops; |
d4f0489f | 5205 | spin_lock(&clp->cl_lock); |
c8623999 | 5206 | ret = find_lockowner_str_locked(clp, &lock->lk_new_owner); |
c58c6610 TM |
5207 | if (ret == NULL) { |
5208 | list_add(&lo->lo_owner.so_strhash, | |
d4f0489f | 5209 | &clp->cl_ownerstr_hashtbl[strhashval]); |
c58c6610 TM |
5210 | ret = lo; |
5211 | } else | |
d50ffded KM |
5212 | nfs4_free_stateowner(&lo->lo_owner); |
5213 | ||
d4f0489f | 5214 | spin_unlock(&clp->cl_lock); |
340f0ba1 | 5215 | return ret; |
1da177e4 LT |
5216 | } |
5217 | ||
356a95ec JL |
5218 | static void |
5219 | init_lock_stateid(struct nfs4_ol_stateid *stp, struct nfs4_lockowner *lo, | |
5220 | struct nfs4_file *fp, struct inode *inode, | |
5221 | struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 5222 | { |
d3b313a4 | 5223 | struct nfs4_client *clp = lo->lo_owner.so_client; |
1da177e4 | 5224 | |
356a95ec JL |
5225 | lockdep_assert_held(&clp->cl_lock); |
5226 | ||
3d0fabd5 | 5227 | atomic_inc(&stp->st_stid.sc_count); |
3abdb607 | 5228 | stp->st_stid.sc_type = NFS4_LOCK_STID; |
b5971afa | 5229 | stp->st_stateowner = nfs4_get_stateowner(&lo->lo_owner); |
13cd2184 | 5230 | get_nfs4_file(fp); |
11b9164a | 5231 | stp->st_stid.sc_file = fp; |
b49e084d | 5232 | stp->st_stid.sc_free = nfs4_free_lock_stateid; |
0997b173 | 5233 | stp->st_access_bmap = 0; |
1da177e4 | 5234 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 5235 | stp->st_openstp = open_stp; |
3c87b9b7 | 5236 | list_add(&stp->st_locks, &open_stp->st_locks); |
1c755dc1 | 5237 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
1d31a253 TM |
5238 | spin_lock(&fp->fi_lock); |
5239 | list_add(&stp->st_perfile, &fp->fi_stateids); | |
5240 | spin_unlock(&fp->fi_lock); | |
1da177e4 LT |
5241 | } |
5242 | ||
c53530da JL |
5243 | static struct nfs4_ol_stateid * |
5244 | find_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp) | |
5245 | { | |
5246 | struct nfs4_ol_stateid *lst; | |
356a95ec JL |
5247 | struct nfs4_client *clp = lo->lo_owner.so_client; |
5248 | ||
5249 | lockdep_assert_held(&clp->cl_lock); | |
c53530da JL |
5250 | |
5251 | list_for_each_entry(lst, &lo->lo_owner.so_stateids, st_perstateowner) { | |
3d0fabd5 TM |
5252 | if (lst->st_stid.sc_file == fp) { |
5253 | atomic_inc(&lst->st_stid.sc_count); | |
c53530da | 5254 | return lst; |
3d0fabd5 | 5255 | } |
c53530da JL |
5256 | } |
5257 | return NULL; | |
5258 | } | |
5259 | ||
356a95ec JL |
5260 | static struct nfs4_ol_stateid * |
5261 | find_or_create_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fi, | |
5262 | struct inode *inode, struct nfs4_ol_stateid *ost, | |
5263 | bool *new) | |
5264 | { | |
5265 | struct nfs4_stid *ns = NULL; | |
5266 | struct nfs4_ol_stateid *lst; | |
5267 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); | |
5268 | struct nfs4_client *clp = oo->oo_owner.so_client; | |
5269 | ||
5270 | spin_lock(&clp->cl_lock); | |
5271 | lst = find_lock_stateid(lo, fi); | |
5272 | if (lst == NULL) { | |
5273 | spin_unlock(&clp->cl_lock); | |
5274 | ns = nfs4_alloc_stid(clp, stateid_slab); | |
5275 | if (ns == NULL) | |
5276 | return NULL; | |
5277 | ||
5278 | spin_lock(&clp->cl_lock); | |
5279 | lst = find_lock_stateid(lo, fi); | |
5280 | if (likely(!lst)) { | |
5281 | lst = openlockstateid(ns); | |
5282 | init_lock_stateid(lst, lo, fi, inode, ost); | |
5283 | ns = NULL; | |
5284 | *new = true; | |
5285 | } | |
5286 | } | |
5287 | spin_unlock(&clp->cl_lock); | |
5288 | if (ns) | |
5289 | nfs4_put_stid(ns); | |
5290 | return lst; | |
5291 | } | |
c53530da | 5292 | |
fd39ca9a | 5293 | static int |
1da177e4 LT |
5294 | check_lock_length(u64 offset, u64 length) |
5295 | { | |
e7969315 KM |
5296 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
5297 | (length > ~offset))); | |
1da177e4 LT |
5298 | } |
5299 | ||
dcef0413 | 5300 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 | 5301 | { |
11b9164a | 5302 | struct nfs4_file *fp = lock_stp->st_stid.sc_file; |
0997b173 | 5303 | |
7214e860 JL |
5304 | lockdep_assert_held(&fp->fi_lock); |
5305 | ||
82c5ff1b | 5306 | if (test_access(access, lock_stp)) |
0997b173 | 5307 | return; |
12659651 | 5308 | __nfs4_file_get_access(fp, access); |
82c5ff1b | 5309 | set_access(access, lock_stp); |
0997b173 BF |
5310 | } |
5311 | ||
356a95ec JL |
5312 | static __be32 |
5313 | lookup_or_create_lock_state(struct nfsd4_compound_state *cstate, | |
5314 | struct nfs4_ol_stateid *ost, | |
5315 | struct nfsd4_lock *lock, | |
5316 | struct nfs4_ol_stateid **lst, bool *new) | |
64a284d0 | 5317 | { |
5db1c03f | 5318 | __be32 status; |
11b9164a | 5319 | struct nfs4_file *fi = ost->st_stid.sc_file; |
64a284d0 BF |
5320 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); |
5321 | struct nfs4_client *cl = oo->oo_owner.so_client; | |
2b0143b5 | 5322 | struct inode *inode = d_inode(cstate->current_fh.fh_dentry); |
64a284d0 BF |
5323 | struct nfs4_lockowner *lo; |
5324 | unsigned int strhashval; | |
5325 | ||
c8623999 | 5326 | lo = find_lockowner_str(cl, &lock->lk_new_owner); |
c53530da | 5327 | if (!lo) { |
76f6c9e1 | 5328 | strhashval = ownerstr_hashval(&lock->lk_new_owner); |
c53530da JL |
5329 | lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); |
5330 | if (lo == NULL) | |
5331 | return nfserr_jukebox; | |
5332 | } else { | |
5333 | /* with an existing lockowner, seqids must be the same */ | |
5db1c03f | 5334 | status = nfserr_bad_seqid; |
c53530da JL |
5335 | if (!cstate->minorversion && |
5336 | lock->lk_new_lock_seqid != lo->lo_owner.so_seqid) | |
5db1c03f | 5337 | goto out; |
64a284d0 | 5338 | } |
c53530da | 5339 | |
356a95ec | 5340 | *lst = find_or_create_lock_stateid(lo, fi, inode, ost, new); |
64a284d0 | 5341 | if (*lst == NULL) { |
5db1c03f JL |
5342 | status = nfserr_jukebox; |
5343 | goto out; | |
64a284d0 | 5344 | } |
5db1c03f JL |
5345 | status = nfs_ok; |
5346 | out: | |
5347 | nfs4_put_stateowner(&lo->lo_owner); | |
5348 | return status; | |
64a284d0 BF |
5349 | } |
5350 | ||
1da177e4 LT |
5351 | /* |
5352 | * LOCK operation | |
5353 | */ | |
b37ad28b | 5354 | __be32 |
ca364317 | 5355 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 5356 | struct nfsd4_lock *lock) |
1da177e4 | 5357 | { |
fe0750e5 BF |
5358 | struct nfs4_openowner *open_sop = NULL; |
5359 | struct nfs4_lockowner *lock_sop = NULL; | |
3d0fabd5 | 5360 | struct nfs4_ol_stateid *lock_stp = NULL; |
0667b1e9 | 5361 | struct nfs4_ol_stateid *open_stp = NULL; |
7214e860 | 5362 | struct nfs4_file *fp; |
7d947842 | 5363 | struct file *filp = NULL; |
21179d81 JL |
5364 | struct file_lock *file_lock = NULL; |
5365 | struct file_lock *conflock = NULL; | |
b37ad28b | 5366 | __be32 status = 0; |
b34f27aa | 5367 | int lkflg; |
b8dd7b9a | 5368 | int err; |
5db1c03f | 5369 | bool new = false; |
3320fef1 SK |
5370 | struct net *net = SVC_NET(rqstp); |
5371 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 LT |
5372 | |
5373 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
5374 | (long long) lock->lk_offset, | |
5375 | (long long) lock->lk_length); | |
5376 | ||
1da177e4 LT |
5377 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
5378 | return nfserr_inval; | |
5379 | ||
ca364317 | 5380 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 5381 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
5382 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
5383 | return status; | |
5384 | } | |
5385 | ||
1da177e4 | 5386 | if (lock->lk_is_new) { |
684e5638 BF |
5387 | if (nfsd4_has_session(cstate)) |
5388 | /* See rfc 5661 18.10.3: given clientid is ignored: */ | |
76f6c9e1 | 5389 | memcpy(&lock->lk_new_clientid, |
684e5638 BF |
5390 | &cstate->session->se_client->cl_clientid, |
5391 | sizeof(clientid_t)); | |
5392 | ||
1da177e4 | 5393 | status = nfserr_stale_clientid; |
2c142baa | 5394 | if (STALE_CLIENTID(&lock->lk_new_clientid, nn)) |
1da177e4 | 5395 | goto out; |
1da177e4 | 5396 | |
1da177e4 | 5397 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 5398 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
5399 | lock->lk_new_open_seqid, |
5400 | &lock->lk_new_open_stateid, | |
3320fef1 | 5401 | &open_stp, nn); |
37515177 | 5402 | if (status) |
1da177e4 | 5403 | goto out; |
fe0750e5 | 5404 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 5405 | status = nfserr_bad_stateid; |
684e5638 | 5406 | if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
76f6c9e1 | 5407 | &lock->lk_new_clientid)) |
b34f27aa | 5408 | goto out; |
64a284d0 | 5409 | status = lookup_or_create_lock_state(cstate, open_stp, lock, |
5db1c03f | 5410 | &lock_stp, &new); |
3d0fabd5 | 5411 | } else { |
dd453dfd | 5412 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
5413 | lock->lk_old_lock_seqid, |
5414 | &lock->lk_old_lock_stateid, | |
3320fef1 | 5415 | NFS4_LOCK_STID, &lock_stp, nn); |
3d0fabd5 | 5416 | } |
e1aaa891 BF |
5417 | if (status) |
5418 | goto out; | |
64a284d0 | 5419 | lock_sop = lockowner(lock_stp->st_stateowner); |
1da177e4 | 5420 | |
b34f27aa BF |
5421 | lkflg = setlkflg(lock->lk_type); |
5422 | status = nfs4_check_openmode(lock_stp, lkflg); | |
5423 | if (status) | |
5424 | goto out; | |
5425 | ||
0dd395dc | 5426 | status = nfserr_grace; |
3320fef1 | 5427 | if (locks_in_grace(net) && !lock->lk_reclaim) |
0dd395dc N |
5428 | goto out; |
5429 | status = nfserr_no_grace; | |
3320fef1 | 5430 | if (!locks_in_grace(net) && lock->lk_reclaim) |
0dd395dc N |
5431 | goto out; |
5432 | ||
21179d81 JL |
5433 | file_lock = locks_alloc_lock(); |
5434 | if (!file_lock) { | |
5435 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
5436 | status = nfserr_jukebox; | |
5437 | goto out; | |
5438 | } | |
5439 | ||
11b9164a | 5440 | fp = lock_stp->st_stid.sc_file; |
1da177e4 LT |
5441 | switch (lock->lk_type) { |
5442 | case NFS4_READ_LT: | |
5443 | case NFS4_READW_LT: | |
7214e860 JL |
5444 | spin_lock(&fp->fi_lock); |
5445 | filp = find_readable_file_locked(fp); | |
0997b173 BF |
5446 | if (filp) |
5447 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
7214e860 | 5448 | spin_unlock(&fp->fi_lock); |
21179d81 | 5449 | file_lock->fl_type = F_RDLCK; |
529d7b2a | 5450 | break; |
1da177e4 LT |
5451 | case NFS4_WRITE_LT: |
5452 | case NFS4_WRITEW_LT: | |
7214e860 JL |
5453 | spin_lock(&fp->fi_lock); |
5454 | filp = find_writeable_file_locked(fp); | |
0997b173 BF |
5455 | if (filp) |
5456 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
7214e860 | 5457 | spin_unlock(&fp->fi_lock); |
21179d81 | 5458 | file_lock->fl_type = F_WRLCK; |
529d7b2a | 5459 | break; |
1da177e4 LT |
5460 | default: |
5461 | status = nfserr_inval; | |
5462 | goto out; | |
5463 | } | |
f9d7562f BF |
5464 | if (!filp) { |
5465 | status = nfserr_openmode; | |
5466 | goto out; | |
5467 | } | |
aef9583b KM |
5468 | |
5469 | file_lock->fl_owner = (fl_owner_t)lockowner(nfs4_get_stateowner(&lock_sop->lo_owner)); | |
21179d81 JL |
5470 | file_lock->fl_pid = current->tgid; |
5471 | file_lock->fl_file = filp; | |
5472 | file_lock->fl_flags = FL_POSIX; | |
5473 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
5474 | file_lock->fl_start = lock->lk_offset; | |
5475 | file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); | |
5476 | nfs4_transform_lock_offset(file_lock); | |
5477 | ||
5478 | conflock = locks_alloc_lock(); | |
5479 | if (!conflock) { | |
5480 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
5481 | status = nfserr_jukebox; | |
5482 | goto out; | |
5483 | } | |
1da177e4 | 5484 | |
21179d81 | 5485 | err = vfs_lock_file(filp, F_SETLK, file_lock, conflock); |
b8dd7b9a | 5486 | switch (-err) { |
1da177e4 | 5487 | case 0: /* success! */ |
dcef0413 BF |
5488 | update_stateid(&lock_stp->st_stid.sc_stateid); |
5489 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, | |
1da177e4 | 5490 | sizeof(stateid_t)); |
b8dd7b9a | 5491 | status = 0; |
eb76b3fd AA |
5492 | break; |
5493 | case (EAGAIN): /* conflock holds conflicting lock */ | |
5494 | status = nfserr_denied; | |
5495 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
21179d81 | 5496 | nfs4_set_lock_denied(conflock, &lock->lk_denied); |
eb76b3fd | 5497 | break; |
1da177e4 LT |
5498 | case (EDEADLK): |
5499 | status = nfserr_deadlock; | |
eb76b3fd | 5500 | break; |
3e772463 | 5501 | default: |
fd85b817 | 5502 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 5503 | status = nfserrno(err); |
eb76b3fd | 5504 | break; |
1da177e4 | 5505 | } |
1da177e4 | 5506 | out: |
de18643d TM |
5507 | if (filp) |
5508 | fput(filp); | |
5db1c03f JL |
5509 | if (lock_stp) { |
5510 | /* Bump seqid manually if the 4.0 replay owner is openowner */ | |
5511 | if (cstate->replay_owner && | |
5512 | cstate->replay_owner != &lock_sop->lo_owner && | |
5513 | seqid_mutating_err(ntohl(status))) | |
5514 | lock_sop->lo_owner.so_seqid++; | |
5515 | ||
5516 | /* | |
5517 | * If this is a new, never-before-used stateid, and we are | |
5518 | * returning an error, then just go ahead and release it. | |
5519 | */ | |
5520 | if (status && new) | |
5521 | release_lock_stateid(lock_stp); | |
5522 | ||
3d0fabd5 | 5523 | nfs4_put_stid(&lock_stp->st_stid); |
5db1c03f | 5524 | } |
0667b1e9 TM |
5525 | if (open_stp) |
5526 | nfs4_put_stid(&open_stp->st_stid); | |
9411b1d4 | 5527 | nfsd4_bump_seqid(cstate, status); |
21179d81 JL |
5528 | if (file_lock) |
5529 | locks_free_lock(file_lock); | |
5530 | if (conflock) | |
5531 | locks_free_lock(conflock); | |
1da177e4 LT |
5532 | return status; |
5533 | } | |
5534 | ||
55ef1274 BF |
5535 | /* |
5536 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
5537 | * so we do a temporary open here just to get an open file to pass to | |
5538 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
5539 | * inode operation.) | |
5540 | */ | |
04da6e9d | 5541 | static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) |
55ef1274 BF |
5542 | { |
5543 | struct file *file; | |
04da6e9d AV |
5544 | __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); |
5545 | if (!err) { | |
5546 | err = nfserrno(vfs_test_lock(file, lock)); | |
fd891454 | 5547 | fput(file); |
04da6e9d | 5548 | } |
55ef1274 BF |
5549 | return err; |
5550 | } | |
5551 | ||
1da177e4 LT |
5552 | /* |
5553 | * LOCKT operation | |
5554 | */ | |
b37ad28b | 5555 | __be32 |
ca364317 BF |
5556 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
5557 | struct nfsd4_lockt *lockt) | |
1da177e4 | 5558 | { |
21179d81 | 5559 | struct file_lock *file_lock = NULL; |
5db1c03f | 5560 | struct nfs4_lockowner *lo = NULL; |
b37ad28b | 5561 | __be32 status; |
7f2210fa | 5562 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 5563 | |
5ccb0066 | 5564 | if (locks_in_grace(SVC_NET(rqstp))) |
1da177e4 LT |
5565 | return nfserr_grace; |
5566 | ||
5567 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
5568 | return nfserr_inval; | |
5569 | ||
9b2ef62b | 5570 | if (!nfsd4_has_session(cstate)) { |
4b24ca7d | 5571 | status = lookup_clientid(&lockt->lt_clientid, cstate, nn); |
9b2ef62b BF |
5572 | if (status) |
5573 | goto out; | |
5574 | } | |
1da177e4 | 5575 | |
75c096f7 | 5576 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 5577 | goto out; |
1da177e4 | 5578 | |
21179d81 JL |
5579 | file_lock = locks_alloc_lock(); |
5580 | if (!file_lock) { | |
5581 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
5582 | status = nfserr_jukebox; | |
5583 | goto out; | |
5584 | } | |
6cd90662 | 5585 | |
1da177e4 LT |
5586 | switch (lockt->lt_type) { |
5587 | case NFS4_READ_LT: | |
5588 | case NFS4_READW_LT: | |
21179d81 | 5589 | file_lock->fl_type = F_RDLCK; |
1da177e4 LT |
5590 | break; |
5591 | case NFS4_WRITE_LT: | |
5592 | case NFS4_WRITEW_LT: | |
21179d81 | 5593 | file_lock->fl_type = F_WRLCK; |
1da177e4 LT |
5594 | break; |
5595 | default: | |
2fdada03 | 5596 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
5597 | status = nfserr_inval; |
5598 | goto out; | |
5599 | } | |
5600 | ||
c8623999 | 5601 | lo = find_lockowner_str(cstate->clp, &lockt->lt_owner); |
fe0750e5 | 5602 | if (lo) |
21179d81 JL |
5603 | file_lock->fl_owner = (fl_owner_t)lo; |
5604 | file_lock->fl_pid = current->tgid; | |
5605 | file_lock->fl_flags = FL_POSIX; | |
1da177e4 | 5606 | |
21179d81 JL |
5607 | file_lock->fl_start = lockt->lt_offset; |
5608 | file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); | |
1da177e4 | 5609 | |
21179d81 | 5610 | nfs4_transform_lock_offset(file_lock); |
1da177e4 | 5611 | |
21179d81 | 5612 | status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock); |
04da6e9d | 5613 | if (status) |
fd85b817 | 5614 | goto out; |
04da6e9d | 5615 | |
21179d81 | 5616 | if (file_lock->fl_type != F_UNLCK) { |
1da177e4 | 5617 | status = nfserr_denied; |
21179d81 | 5618 | nfs4_set_lock_denied(file_lock, &lockt->lt_denied); |
1da177e4 LT |
5619 | } |
5620 | out: | |
5db1c03f JL |
5621 | if (lo) |
5622 | nfs4_put_stateowner(&lo->lo_owner); | |
21179d81 JL |
5623 | if (file_lock) |
5624 | locks_free_lock(file_lock); | |
1da177e4 LT |
5625 | return status; |
5626 | } | |
5627 | ||
b37ad28b | 5628 | __be32 |
ca364317 | 5629 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 5630 | struct nfsd4_locku *locku) |
1da177e4 | 5631 | { |
dcef0413 | 5632 | struct nfs4_ol_stateid *stp; |
1da177e4 | 5633 | struct file *filp = NULL; |
21179d81 | 5634 | struct file_lock *file_lock = NULL; |
b37ad28b | 5635 | __be32 status; |
b8dd7b9a | 5636 | int err; |
3320fef1 SK |
5637 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
5638 | ||
1da177e4 LT |
5639 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", |
5640 | (long long) locku->lu_offset, | |
5641 | (long long) locku->lu_length); | |
5642 | ||
5643 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
5644 | return nfserr_inval; | |
5645 | ||
9072d5c6 | 5646 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
3320fef1 SK |
5647 | &locku->lu_stateid, NFS4_LOCK_STID, |
5648 | &stp, nn); | |
9072d5c6 | 5649 | if (status) |
1da177e4 | 5650 | goto out; |
11b9164a | 5651 | filp = find_any_file(stp->st_stid.sc_file); |
f9d7562f BF |
5652 | if (!filp) { |
5653 | status = nfserr_lock_range; | |
858cc573 | 5654 | goto put_stateid; |
f9d7562f | 5655 | } |
21179d81 JL |
5656 | file_lock = locks_alloc_lock(); |
5657 | if (!file_lock) { | |
5658 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
5659 | status = nfserr_jukebox; | |
de18643d | 5660 | goto fput; |
21179d81 | 5661 | } |
6cd90662 | 5662 | |
21179d81 | 5663 | file_lock->fl_type = F_UNLCK; |
aef9583b | 5664 | file_lock->fl_owner = (fl_owner_t)lockowner(nfs4_get_stateowner(stp->st_stateowner)); |
21179d81 JL |
5665 | file_lock->fl_pid = current->tgid; |
5666 | file_lock->fl_file = filp; | |
5667 | file_lock->fl_flags = FL_POSIX; | |
5668 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
5669 | file_lock->fl_start = locku->lu_offset; | |
5670 | ||
5671 | file_lock->fl_end = last_byte_offset(locku->lu_offset, | |
5672 | locku->lu_length); | |
5673 | nfs4_transform_lock_offset(file_lock); | |
1da177e4 | 5674 | |
21179d81 | 5675 | err = vfs_lock_file(filp, F_SETLK, file_lock, NULL); |
b8dd7b9a | 5676 | if (err) { |
fd85b817 | 5677 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
5678 | goto out_nfserr; |
5679 | } | |
dcef0413 BF |
5680 | update_stateid(&stp->st_stid.sc_stateid); |
5681 | memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
de18643d TM |
5682 | fput: |
5683 | fput(filp); | |
858cc573 TM |
5684 | put_stateid: |
5685 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 5686 | out: |
9411b1d4 | 5687 | nfsd4_bump_seqid(cstate, status); |
21179d81 JL |
5688 | if (file_lock) |
5689 | locks_free_lock(file_lock); | |
1da177e4 LT |
5690 | return status; |
5691 | ||
5692 | out_nfserr: | |
b8dd7b9a | 5693 | status = nfserrno(err); |
de18643d | 5694 | goto fput; |
1da177e4 LT |
5695 | } |
5696 | ||
5697 | /* | |
5698 | * returns | |
f9c00c3a JL |
5699 | * true: locks held by lockowner |
5700 | * false: no locks held by lockowner | |
1da177e4 | 5701 | */ |
f9c00c3a JL |
5702 | static bool |
5703 | check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner) | |
1da177e4 | 5704 | { |
bd61e0a9 | 5705 | struct file_lock *fl; |
f9c00c3a JL |
5706 | int status = false; |
5707 | struct file *filp = find_any_file(fp); | |
5708 | struct inode *inode; | |
bd61e0a9 | 5709 | struct file_lock_context *flctx; |
f9c00c3a JL |
5710 | |
5711 | if (!filp) { | |
5712 | /* Any valid lock stateid should have some sort of access */ | |
5713 | WARN_ON_ONCE(1); | |
5714 | return status; | |
5715 | } | |
5716 | ||
5717 | inode = file_inode(filp); | |
bd61e0a9 JL |
5718 | flctx = inode->i_flctx; |
5719 | ||
5720 | if (flctx && !list_empty_careful(&flctx->flc_posix)) { | |
6109c850 | 5721 | spin_lock(&flctx->flc_lock); |
bd61e0a9 JL |
5722 | list_for_each_entry(fl, &flctx->flc_posix, fl_list) { |
5723 | if (fl->fl_owner == (fl_owner_t)lowner) { | |
5724 | status = true; | |
5725 | break; | |
5726 | } | |
796dadfd | 5727 | } |
6109c850 | 5728 | spin_unlock(&flctx->flc_lock); |
1da177e4 | 5729 | } |
f9c00c3a | 5730 | fput(filp); |
1da177e4 LT |
5731 | return status; |
5732 | } | |
5733 | ||
b37ad28b | 5734 | __be32 |
b591480b BF |
5735 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
5736 | struct nfsd4_compound_state *cstate, | |
5737 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
5738 | { |
5739 | clientid_t *clid = &rlockowner->rl_clientid; | |
882e9d25 JL |
5740 | struct nfs4_stateowner *sop; |
5741 | struct nfs4_lockowner *lo = NULL; | |
dcef0413 | 5742 | struct nfs4_ol_stateid *stp; |
1da177e4 | 5743 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
d4f0489f | 5744 | unsigned int hashval = ownerstr_hashval(owner); |
b37ad28b | 5745 | __be32 status; |
7f2210fa | 5746 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
c58c6610 | 5747 | struct nfs4_client *clp; |
1da177e4 LT |
5748 | |
5749 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
5750 | clid->cl_boot, clid->cl_id); | |
5751 | ||
4b24ca7d | 5752 | status = lookup_clientid(clid, cstate, nn); |
9b2ef62b | 5753 | if (status) |
51f5e783 | 5754 | return status; |
9b2ef62b | 5755 | |
d4f0489f | 5756 | clp = cstate->clp; |
fd44907c | 5757 | /* Find the matching lock stateowner */ |
d4f0489f | 5758 | spin_lock(&clp->cl_lock); |
882e9d25 | 5759 | list_for_each_entry(sop, &clp->cl_ownerstr_hashtbl[hashval], |
d4f0489f | 5760 | so_strhash) { |
fd44907c | 5761 | |
882e9d25 JL |
5762 | if (sop->so_is_open_owner || !same_owner_str(sop, owner)) |
5763 | continue; | |
fd44907c | 5764 | |
882e9d25 JL |
5765 | /* see if there are still any locks associated with it */ |
5766 | lo = lockowner(sop); | |
5767 | list_for_each_entry(stp, &sop->so_stateids, st_perstateowner) { | |
5768 | if (check_for_locks(stp->st_stid.sc_file, lo)) { | |
5769 | status = nfserr_locks_held; | |
5770 | spin_unlock(&clp->cl_lock); | |
51f5e783 | 5771 | return status; |
882e9d25 | 5772 | } |
5adfd885 | 5773 | } |
882e9d25 | 5774 | |
b5971afa | 5775 | nfs4_get_stateowner(sop); |
882e9d25 | 5776 | break; |
1da177e4 | 5777 | } |
c58c6610 | 5778 | spin_unlock(&clp->cl_lock); |
882e9d25 JL |
5779 | if (lo) |
5780 | release_lockowner(lo); | |
1da177e4 LT |
5781 | return status; |
5782 | } | |
5783 | ||
5784 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 5785 | alloc_reclaim(void) |
1da177e4 | 5786 | { |
a55370a3 | 5787 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
5788 | } |
5789 | ||
0ce0c2b5 | 5790 | bool |
52e19c09 | 5791 | nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn) |
c7b9a459 | 5792 | { |
0ce0c2b5 | 5793 | struct nfs4_client_reclaim *crp; |
c7b9a459 | 5794 | |
52e19c09 | 5795 | crp = nfsd4_find_reclaim_client(name, nn); |
0ce0c2b5 | 5796 | return (crp && crp->cr_clp); |
c7b9a459 N |
5797 | } |
5798 | ||
1da177e4 LT |
5799 | /* |
5800 | * failure => all reset bets are off, nfserr_no_grace... | |
5801 | */ | |
772a9bbb | 5802 | struct nfs4_client_reclaim * |
52e19c09 | 5803 | nfs4_client_to_reclaim(const char *name, struct nfsd_net *nn) |
1da177e4 LT |
5804 | { |
5805 | unsigned int strhashval; | |
772a9bbb | 5806 | struct nfs4_client_reclaim *crp; |
1da177e4 | 5807 | |
a55370a3 N |
5808 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
5809 | crp = alloc_reclaim(); | |
772a9bbb JL |
5810 | if (crp) { |
5811 | strhashval = clientstr_hashval(name); | |
5812 | INIT_LIST_HEAD(&crp->cr_strhash); | |
52e19c09 | 5813 | list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]); |
772a9bbb | 5814 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
0ce0c2b5 | 5815 | crp->cr_clp = NULL; |
52e19c09 | 5816 | nn->reclaim_str_hashtbl_size++; |
772a9bbb JL |
5817 | } |
5818 | return crp; | |
1da177e4 LT |
5819 | } |
5820 | ||
ce30e539 | 5821 | void |
52e19c09 | 5822 | nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn) |
ce30e539 JL |
5823 | { |
5824 | list_del(&crp->cr_strhash); | |
5825 | kfree(crp); | |
52e19c09 | 5826 | nn->reclaim_str_hashtbl_size--; |
ce30e539 JL |
5827 | } |
5828 | ||
2a4317c5 | 5829 | void |
52e19c09 | 5830 | nfs4_release_reclaim(struct nfsd_net *nn) |
1da177e4 LT |
5831 | { |
5832 | struct nfs4_client_reclaim *crp = NULL; | |
5833 | int i; | |
5834 | ||
1da177e4 | 5835 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
52e19c09 SK |
5836 | while (!list_empty(&nn->reclaim_str_hashtbl[i])) { |
5837 | crp = list_entry(nn->reclaim_str_hashtbl[i].next, | |
1da177e4 | 5838 | struct nfs4_client_reclaim, cr_strhash); |
52e19c09 | 5839 | nfs4_remove_reclaim_record(crp, nn); |
1da177e4 LT |
5840 | } |
5841 | } | |
063b0fb9 | 5842 | WARN_ON_ONCE(nn->reclaim_str_hashtbl_size); |
1da177e4 LT |
5843 | } |
5844 | ||
5845 | /* | |
5846 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
2a4317c5 | 5847 | struct nfs4_client_reclaim * |
52e19c09 | 5848 | nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn) |
1da177e4 LT |
5849 | { |
5850 | unsigned int strhashval; | |
1da177e4 LT |
5851 | struct nfs4_client_reclaim *crp = NULL; |
5852 | ||
278c931c | 5853 | dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir); |
1da177e4 | 5854 | |
278c931c | 5855 | strhashval = clientstr_hashval(recdir); |
52e19c09 | 5856 | list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) { |
278c931c | 5857 | if (same_name(crp->cr_recdir, recdir)) { |
1da177e4 LT |
5858 | return crp; |
5859 | } | |
5860 | } | |
5861 | return NULL; | |
5862 | } | |
5863 | ||
5864 | /* | |
5865 | * Called from OPEN. Look for clientid in reclaim list. | |
5866 | */ | |
b37ad28b | 5867 | __be32 |
0fe492db TM |
5868 | nfs4_check_open_reclaim(clientid_t *clid, |
5869 | struct nfsd4_compound_state *cstate, | |
5870 | struct nfsd_net *nn) | |
1da177e4 | 5871 | { |
0fe492db | 5872 | __be32 status; |
a52d726b JL |
5873 | |
5874 | /* find clientid in conf_id_hashtbl */ | |
0fe492db TM |
5875 | status = lookup_clientid(clid, cstate, nn); |
5876 | if (status) | |
a52d726b JL |
5877 | return nfserr_reclaim_bad; |
5878 | ||
3b3e7b72 JL |
5879 | if (test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, &cstate->clp->cl_flags)) |
5880 | return nfserr_no_grace; | |
5881 | ||
0fe492db TM |
5882 | if (nfsd4_client_record_check(cstate->clp)) |
5883 | return nfserr_reclaim_bad; | |
5884 | ||
5885 | return nfs_ok; | |
1da177e4 LT |
5886 | } |
5887 | ||
65178db4 | 5888 | #ifdef CONFIG_NFSD_FAULT_INJECTION |
016200c3 JL |
5889 | static inline void |
5890 | put_client(struct nfs4_client *clp) | |
5891 | { | |
5892 | atomic_dec(&clp->cl_refcount); | |
5893 | } | |
5894 | ||
285abdee JL |
5895 | static struct nfs4_client * |
5896 | nfsd_find_client(struct sockaddr_storage *addr, size_t addr_size) | |
5897 | { | |
5898 | struct nfs4_client *clp; | |
5899 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
5900 | nfsd_net_id); | |
5901 | ||
5902 | if (!nfsd_netns_ready(nn)) | |
5903 | return NULL; | |
5904 | ||
5905 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
5906 | if (memcmp(&clp->cl_addr, addr, addr_size) == 0) | |
5907 | return clp; | |
5908 | } | |
5909 | return NULL; | |
5910 | } | |
5911 | ||
7ec0e36f | 5912 | u64 |
285abdee | 5913 | nfsd_inject_print_clients(void) |
7ec0e36f JL |
5914 | { |
5915 | struct nfs4_client *clp; | |
5916 | u64 count = 0; | |
5917 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
5918 | nfsd_net_id); | |
5919 | char buf[INET6_ADDRSTRLEN]; | |
5920 | ||
5921 | if (!nfsd_netns_ready(nn)) | |
5922 | return 0; | |
5923 | ||
5924 | spin_lock(&nn->client_lock); | |
5925 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
5926 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); | |
5927 | pr_info("NFS Client: %s\n", buf); | |
5928 | ++count; | |
5929 | } | |
5930 | spin_unlock(&nn->client_lock); | |
5931 | ||
5932 | return count; | |
5933 | } | |
65178db4 | 5934 | |
a0926d15 | 5935 | u64 |
285abdee | 5936 | nfsd_inject_forget_client(struct sockaddr_storage *addr, size_t addr_size) |
a0926d15 JL |
5937 | { |
5938 | u64 count = 0; | |
5939 | struct nfs4_client *clp; | |
5940 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
5941 | nfsd_net_id); | |
5942 | ||
5943 | if (!nfsd_netns_ready(nn)) | |
5944 | return count; | |
5945 | ||
5946 | spin_lock(&nn->client_lock); | |
5947 | clp = nfsd_find_client(addr, addr_size); | |
5948 | if (clp) { | |
5949 | if (mark_client_expired_locked(clp) == nfs_ok) | |
5950 | ++count; | |
5951 | else | |
5952 | clp = NULL; | |
5953 | } | |
5954 | spin_unlock(&nn->client_lock); | |
5955 | ||
5956 | if (clp) | |
5957 | expire_client(clp); | |
5958 | ||
5959 | return count; | |
5960 | } | |
5961 | ||
69fc9edf | 5962 | u64 |
285abdee | 5963 | nfsd_inject_forget_clients(u64 max) |
69fc9edf JL |
5964 | { |
5965 | u64 count = 0; | |
5966 | struct nfs4_client *clp, *next; | |
5967 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
5968 | nfsd_net_id); | |
5969 | LIST_HEAD(reaplist); | |
5970 | ||
5971 | if (!nfsd_netns_ready(nn)) | |
5972 | return count; | |
5973 | ||
5974 | spin_lock(&nn->client_lock); | |
5975 | list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { | |
5976 | if (mark_client_expired_locked(clp) == nfs_ok) { | |
5977 | list_add(&clp->cl_lru, &reaplist); | |
5978 | if (max != 0 && ++count >= max) | |
5979 | break; | |
5980 | } | |
5981 | } | |
5982 | spin_unlock(&nn->client_lock); | |
5983 | ||
5984 | list_for_each_entry_safe(clp, next, &reaplist, cl_lru) | |
5985 | expire_client(clp); | |
5986 | ||
5987 | return count; | |
5988 | } | |
5989 | ||
184c1847 BS |
5990 | static void nfsd_print_count(struct nfs4_client *clp, unsigned int count, |
5991 | const char *type) | |
5992 | { | |
5993 | char buf[INET6_ADDRSTRLEN]; | |
0a5c33e2 | 5994 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
184c1847 BS |
5995 | printk(KERN_INFO "NFS Client: %s has %u %s\n", buf, count, type); |
5996 | } | |
5997 | ||
016200c3 JL |
5998 | static void |
5999 | nfsd_inject_add_lock_to_list(struct nfs4_ol_stateid *lst, | |
6000 | struct list_head *collect) | |
6001 | { | |
6002 | struct nfs4_client *clp = lst->st_stid.sc_client; | |
6003 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6004 | nfsd_net_id); | |
6005 | ||
6006 | if (!collect) | |
6007 | return; | |
6008 | ||
6009 | lockdep_assert_held(&nn->client_lock); | |
6010 | atomic_inc(&clp->cl_refcount); | |
6011 | list_add(&lst->st_locks, collect); | |
6012 | } | |
6013 | ||
3c87b9b7 | 6014 | static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max, |
3738d50e | 6015 | struct list_head *collect, |
3c87b9b7 | 6016 | void (*func)(struct nfs4_ol_stateid *)) |
fc29171f BS |
6017 | { |
6018 | struct nfs4_openowner *oop; | |
fc29171f | 6019 | struct nfs4_ol_stateid *stp, *st_next; |
3c87b9b7 | 6020 | struct nfs4_ol_stateid *lst, *lst_next; |
fc29171f BS |
6021 | u64 count = 0; |
6022 | ||
016200c3 | 6023 | spin_lock(&clp->cl_lock); |
fc29171f | 6024 | list_for_each_entry(oop, &clp->cl_openowners, oo_perclient) { |
3c87b9b7 TM |
6025 | list_for_each_entry_safe(stp, st_next, |
6026 | &oop->oo_owner.so_stateids, st_perstateowner) { | |
6027 | list_for_each_entry_safe(lst, lst_next, | |
6028 | &stp->st_locks, st_locks) { | |
3738d50e | 6029 | if (func) { |
3c87b9b7 | 6030 | func(lst); |
016200c3 JL |
6031 | nfsd_inject_add_lock_to_list(lst, |
6032 | collect); | |
3738d50e | 6033 | } |
016200c3 JL |
6034 | ++count; |
6035 | /* | |
6036 | * Despite the fact that these functions deal | |
6037 | * with 64-bit integers for "count", we must | |
6038 | * ensure that it doesn't blow up the | |
6039 | * clp->cl_refcount. Throw a warning if we | |
6040 | * start to approach INT_MAX here. | |
6041 | */ | |
6042 | WARN_ON_ONCE(count == (INT_MAX / 2)); | |
6043 | if (count == max) | |
6044 | goto out; | |
fc29171f BS |
6045 | } |
6046 | } | |
6047 | } | |
016200c3 JL |
6048 | out: |
6049 | spin_unlock(&clp->cl_lock); | |
fc29171f BS |
6050 | |
6051 | return count; | |
6052 | } | |
6053 | ||
016200c3 JL |
6054 | static u64 |
6055 | nfsd_collect_client_locks(struct nfs4_client *clp, struct list_head *collect, | |
6056 | u64 max) | |
fc29171f | 6057 | { |
016200c3 | 6058 | return nfsd_foreach_client_lock(clp, max, collect, unhash_lock_stateid); |
fc29171f BS |
6059 | } |
6060 | ||
016200c3 JL |
6061 | static u64 |
6062 | nfsd_print_client_locks(struct nfs4_client *clp) | |
184c1847 | 6063 | { |
016200c3 | 6064 | u64 count = nfsd_foreach_client_lock(clp, 0, NULL, NULL); |
184c1847 BS |
6065 | nfsd_print_count(clp, count, "locked files"); |
6066 | return count; | |
6067 | } | |
6068 | ||
016200c3 | 6069 | u64 |
285abdee | 6070 | nfsd_inject_print_locks(void) |
016200c3 JL |
6071 | { |
6072 | struct nfs4_client *clp; | |
6073 | u64 count = 0; | |
6074 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6075 | nfsd_net_id); | |
6076 | ||
6077 | if (!nfsd_netns_ready(nn)) | |
6078 | return 0; | |
6079 | ||
6080 | spin_lock(&nn->client_lock); | |
6081 | list_for_each_entry(clp, &nn->client_lru, cl_lru) | |
6082 | count += nfsd_print_client_locks(clp); | |
6083 | spin_unlock(&nn->client_lock); | |
6084 | ||
6085 | return count; | |
6086 | } | |
6087 | ||
6088 | static void | |
6089 | nfsd_reap_locks(struct list_head *reaplist) | |
6090 | { | |
6091 | struct nfs4_client *clp; | |
6092 | struct nfs4_ol_stateid *stp, *next; | |
6093 | ||
6094 | list_for_each_entry_safe(stp, next, reaplist, st_locks) { | |
6095 | list_del_init(&stp->st_locks); | |
6096 | clp = stp->st_stid.sc_client; | |
6097 | nfs4_put_stid(&stp->st_stid); | |
6098 | put_client(clp); | |
6099 | } | |
6100 | } | |
6101 | ||
6102 | u64 | |
285abdee | 6103 | nfsd_inject_forget_client_locks(struct sockaddr_storage *addr, size_t addr_size) |
016200c3 JL |
6104 | { |
6105 | unsigned int count = 0; | |
6106 | struct nfs4_client *clp; | |
6107 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6108 | nfsd_net_id); | |
6109 | LIST_HEAD(reaplist); | |
6110 | ||
6111 | if (!nfsd_netns_ready(nn)) | |
6112 | return count; | |
6113 | ||
6114 | spin_lock(&nn->client_lock); | |
6115 | clp = nfsd_find_client(addr, addr_size); | |
6116 | if (clp) | |
6117 | count = nfsd_collect_client_locks(clp, &reaplist, 0); | |
6118 | spin_unlock(&nn->client_lock); | |
6119 | nfsd_reap_locks(&reaplist); | |
6120 | return count; | |
6121 | } | |
6122 | ||
6123 | u64 | |
285abdee | 6124 | nfsd_inject_forget_locks(u64 max) |
016200c3 JL |
6125 | { |
6126 | u64 count = 0; | |
6127 | struct nfs4_client *clp; | |
6128 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6129 | nfsd_net_id); | |
6130 | LIST_HEAD(reaplist); | |
6131 | ||
6132 | if (!nfsd_netns_ready(nn)) | |
6133 | return count; | |
6134 | ||
6135 | spin_lock(&nn->client_lock); | |
6136 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
6137 | count += nfsd_collect_client_locks(clp, &reaplist, max - count); | |
6138 | if (max != 0 && count >= max) | |
6139 | break; | |
6140 | } | |
6141 | spin_unlock(&nn->client_lock); | |
6142 | nfsd_reap_locks(&reaplist); | |
6143 | return count; | |
6144 | } | |
6145 | ||
82e05efa JL |
6146 | static u64 |
6147 | nfsd_foreach_client_openowner(struct nfs4_client *clp, u64 max, | |
6148 | struct list_head *collect, | |
6149 | void (*func)(struct nfs4_openowner *)) | |
4dbdbda8 BS |
6150 | { |
6151 | struct nfs4_openowner *oop, *next; | |
82e05efa JL |
6152 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, |
6153 | nfsd_net_id); | |
4dbdbda8 BS |
6154 | u64 count = 0; |
6155 | ||
82e05efa JL |
6156 | lockdep_assert_held(&nn->client_lock); |
6157 | ||
6158 | spin_lock(&clp->cl_lock); | |
4dbdbda8 | 6159 | list_for_each_entry_safe(oop, next, &clp->cl_openowners, oo_perclient) { |
82e05efa | 6160 | if (func) { |
4dbdbda8 | 6161 | func(oop); |
82e05efa JL |
6162 | if (collect) { |
6163 | atomic_inc(&clp->cl_refcount); | |
6164 | list_add(&oop->oo_perclient, collect); | |
6165 | } | |
6166 | } | |
6167 | ++count; | |
6168 | /* | |
6169 | * Despite the fact that these functions deal with | |
6170 | * 64-bit integers for "count", we must ensure that | |
6171 | * it doesn't blow up the clp->cl_refcount. Throw a | |
6172 | * warning if we start to approach INT_MAX here. | |
6173 | */ | |
6174 | WARN_ON_ONCE(count == (INT_MAX / 2)); | |
6175 | if (count == max) | |
4dbdbda8 BS |
6176 | break; |
6177 | } | |
82e05efa JL |
6178 | spin_unlock(&clp->cl_lock); |
6179 | ||
6180 | return count; | |
6181 | } | |
6182 | ||
6183 | static u64 | |
6184 | nfsd_print_client_openowners(struct nfs4_client *clp) | |
6185 | { | |
6186 | u64 count = nfsd_foreach_client_openowner(clp, 0, NULL, NULL); | |
6187 | ||
6188 | nfsd_print_count(clp, count, "openowners"); | |
6189 | return count; | |
6190 | } | |
6191 | ||
6192 | static u64 | |
6193 | nfsd_collect_client_openowners(struct nfs4_client *clp, | |
6194 | struct list_head *collect, u64 max) | |
6195 | { | |
6196 | return nfsd_foreach_client_openowner(clp, max, collect, | |
6197 | unhash_openowner_locked); | |
6198 | } | |
6199 | ||
6200 | u64 | |
285abdee | 6201 | nfsd_inject_print_openowners(void) |
82e05efa JL |
6202 | { |
6203 | struct nfs4_client *clp; | |
6204 | u64 count = 0; | |
6205 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6206 | nfsd_net_id); | |
6207 | ||
6208 | if (!nfsd_netns_ready(nn)) | |
6209 | return 0; | |
6210 | ||
6211 | spin_lock(&nn->client_lock); | |
6212 | list_for_each_entry(clp, &nn->client_lru, cl_lru) | |
6213 | count += nfsd_print_client_openowners(clp); | |
6214 | spin_unlock(&nn->client_lock); | |
4dbdbda8 BS |
6215 | |
6216 | return count; | |
6217 | } | |
6218 | ||
82e05efa JL |
6219 | static void |
6220 | nfsd_reap_openowners(struct list_head *reaplist) | |
6221 | { | |
6222 | struct nfs4_client *clp; | |
6223 | struct nfs4_openowner *oop, *next; | |
6224 | ||
6225 | list_for_each_entry_safe(oop, next, reaplist, oo_perclient) { | |
6226 | list_del_init(&oop->oo_perclient); | |
6227 | clp = oop->oo_owner.so_client; | |
6228 | release_openowner(oop); | |
6229 | put_client(clp); | |
6230 | } | |
6231 | } | |
6232 | ||
6233 | u64 | |
285abdee JL |
6234 | nfsd_inject_forget_client_openowners(struct sockaddr_storage *addr, |
6235 | size_t addr_size) | |
4dbdbda8 | 6236 | { |
82e05efa JL |
6237 | unsigned int count = 0; |
6238 | struct nfs4_client *clp; | |
6239 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6240 | nfsd_net_id); | |
6241 | LIST_HEAD(reaplist); | |
6242 | ||
6243 | if (!nfsd_netns_ready(nn)) | |
6244 | return count; | |
6245 | ||
6246 | spin_lock(&nn->client_lock); | |
6247 | clp = nfsd_find_client(addr, addr_size); | |
6248 | if (clp) | |
6249 | count = nfsd_collect_client_openowners(clp, &reaplist, 0); | |
6250 | spin_unlock(&nn->client_lock); | |
6251 | nfsd_reap_openowners(&reaplist); | |
6252 | return count; | |
4dbdbda8 BS |
6253 | } |
6254 | ||
82e05efa | 6255 | u64 |
285abdee | 6256 | nfsd_inject_forget_openowners(u64 max) |
184c1847 | 6257 | { |
82e05efa JL |
6258 | u64 count = 0; |
6259 | struct nfs4_client *clp; | |
6260 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6261 | nfsd_net_id); | |
6262 | LIST_HEAD(reaplist); | |
6263 | ||
6264 | if (!nfsd_netns_ready(nn)) | |
6265 | return count; | |
6266 | ||
6267 | spin_lock(&nn->client_lock); | |
6268 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
6269 | count += nfsd_collect_client_openowners(clp, &reaplist, | |
6270 | max - count); | |
6271 | if (max != 0 && count >= max) | |
6272 | break; | |
6273 | } | |
6274 | spin_unlock(&nn->client_lock); | |
6275 | nfsd_reap_openowners(&reaplist); | |
184c1847 BS |
6276 | return count; |
6277 | } | |
6278 | ||
269de30f BS |
6279 | static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max, |
6280 | struct list_head *victims) | |
6281 | { | |
6282 | struct nfs4_delegation *dp, *next; | |
98d5c7c5 JL |
6283 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, |
6284 | nfsd_net_id); | |
269de30f BS |
6285 | u64 count = 0; |
6286 | ||
98d5c7c5 JL |
6287 | lockdep_assert_held(&nn->client_lock); |
6288 | ||
6289 | spin_lock(&state_lock); | |
269de30f | 6290 | list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) { |
dff1399f JL |
6291 | if (victims) { |
6292 | /* | |
6293 | * It's not safe to mess with delegations that have a | |
6294 | * non-zero dl_time. They might have already been broken | |
6295 | * and could be processed by the laundromat outside of | |
6296 | * the state_lock. Just leave them be. | |
6297 | */ | |
6298 | if (dp->dl_time != 0) | |
6299 | continue; | |
6300 | ||
98d5c7c5 | 6301 | atomic_inc(&clp->cl_refcount); |
42690676 JL |
6302 | unhash_delegation_locked(dp); |
6303 | list_add(&dp->dl_recall_lru, victims); | |
dff1399f | 6304 | } |
98d5c7c5 JL |
6305 | ++count; |
6306 | /* | |
6307 | * Despite the fact that these functions deal with | |
6308 | * 64-bit integers for "count", we must ensure that | |
6309 | * it doesn't blow up the clp->cl_refcount. Throw a | |
6310 | * warning if we start to approach INT_MAX here. | |
6311 | */ | |
6312 | WARN_ON_ONCE(count == (INT_MAX / 2)); | |
6313 | if (count == max) | |
269de30f BS |
6314 | break; |
6315 | } | |
98d5c7c5 | 6316 | spin_unlock(&state_lock); |
269de30f BS |
6317 | return count; |
6318 | } | |
6319 | ||
98d5c7c5 JL |
6320 | static u64 |
6321 | nfsd_print_client_delegations(struct nfs4_client *clp) | |
269de30f | 6322 | { |
98d5c7c5 | 6323 | u64 count = nfsd_find_all_delegations(clp, 0, NULL); |
269de30f | 6324 | |
98d5c7c5 JL |
6325 | nfsd_print_count(clp, count, "delegations"); |
6326 | return count; | |
6327 | } | |
6328 | ||
6329 | u64 | |
285abdee | 6330 | nfsd_inject_print_delegations(void) |
98d5c7c5 JL |
6331 | { |
6332 | struct nfs4_client *clp; | |
6333 | u64 count = 0; | |
6334 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6335 | nfsd_net_id); | |
6336 | ||
6337 | if (!nfsd_netns_ready(nn)) | |
6338 | return 0; | |
269de30f | 6339 | |
98d5c7c5 JL |
6340 | spin_lock(&nn->client_lock); |
6341 | list_for_each_entry(clp, &nn->client_lru, cl_lru) | |
6342 | count += nfsd_print_client_delegations(clp); | |
6343 | spin_unlock(&nn->client_lock); | |
6344 | ||
6345 | return count; | |
6346 | } | |
6347 | ||
6348 | static void | |
6349 | nfsd_forget_delegations(struct list_head *reaplist) | |
6350 | { | |
6351 | struct nfs4_client *clp; | |
6352 | struct nfs4_delegation *dp, *next; | |
6353 | ||
6354 | list_for_each_entry_safe(dp, next, reaplist, dl_recall_lru) { | |
2d4a532d | 6355 | list_del_init(&dp->dl_recall_lru); |
98d5c7c5 | 6356 | clp = dp->dl_stid.sc_client; |
3bd64a5b | 6357 | revoke_delegation(dp); |
98d5c7c5 | 6358 | put_client(clp); |
2d4a532d | 6359 | } |
98d5c7c5 JL |
6360 | } |
6361 | ||
6362 | u64 | |
285abdee JL |
6363 | nfsd_inject_forget_client_delegations(struct sockaddr_storage *addr, |
6364 | size_t addr_size) | |
98d5c7c5 JL |
6365 | { |
6366 | u64 count = 0; | |
6367 | struct nfs4_client *clp; | |
6368 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6369 | nfsd_net_id); | |
6370 | LIST_HEAD(reaplist); | |
6371 | ||
6372 | if (!nfsd_netns_ready(nn)) | |
6373 | return count; | |
6374 | ||
6375 | spin_lock(&nn->client_lock); | |
6376 | clp = nfsd_find_client(addr, addr_size); | |
6377 | if (clp) | |
6378 | count = nfsd_find_all_delegations(clp, 0, &reaplist); | |
6379 | spin_unlock(&nn->client_lock); | |
6380 | ||
6381 | nfsd_forget_delegations(&reaplist); | |
6382 | return count; | |
6383 | } | |
269de30f | 6384 | |
98d5c7c5 | 6385 | u64 |
285abdee | 6386 | nfsd_inject_forget_delegations(u64 max) |
98d5c7c5 JL |
6387 | { |
6388 | u64 count = 0; | |
6389 | struct nfs4_client *clp; | |
6390 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6391 | nfsd_net_id); | |
6392 | LIST_HEAD(reaplist); | |
6393 | ||
6394 | if (!nfsd_netns_ready(nn)) | |
6395 | return count; | |
6396 | ||
6397 | spin_lock(&nn->client_lock); | |
6398 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
6399 | count += nfsd_find_all_delegations(clp, max - count, &reaplist); | |
6400 | if (max != 0 && count >= max) | |
6401 | break; | |
6402 | } | |
6403 | spin_unlock(&nn->client_lock); | |
6404 | nfsd_forget_delegations(&reaplist); | |
269de30f BS |
6405 | return count; |
6406 | } | |
6407 | ||
98d5c7c5 JL |
6408 | static void |
6409 | nfsd_recall_delegations(struct list_head *reaplist) | |
269de30f | 6410 | { |
98d5c7c5 JL |
6411 | struct nfs4_client *clp; |
6412 | struct nfs4_delegation *dp, *next; | |
269de30f | 6413 | |
98d5c7c5 | 6414 | list_for_each_entry_safe(dp, next, reaplist, dl_recall_lru) { |
dff1399f | 6415 | list_del_init(&dp->dl_recall_lru); |
98d5c7c5 JL |
6416 | clp = dp->dl_stid.sc_client; |
6417 | /* | |
6418 | * We skipped all entries that had a zero dl_time before, | |
6419 | * so we can now reset the dl_time back to 0. If a delegation | |
6420 | * break comes in now, then it won't make any difference since | |
6421 | * we're recalling it either way. | |
6422 | */ | |
6423 | spin_lock(&state_lock); | |
dff1399f | 6424 | dp->dl_time = 0; |
98d5c7c5 | 6425 | spin_unlock(&state_lock); |
269de30f | 6426 | nfsd_break_one_deleg(dp); |
98d5c7c5 | 6427 | put_client(clp); |
dff1399f | 6428 | } |
98d5c7c5 | 6429 | } |
269de30f | 6430 | |
98d5c7c5 | 6431 | u64 |
285abdee | 6432 | nfsd_inject_recall_client_delegations(struct sockaddr_storage *addr, |
98d5c7c5 JL |
6433 | size_t addr_size) |
6434 | { | |
6435 | u64 count = 0; | |
6436 | struct nfs4_client *clp; | |
6437 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6438 | nfsd_net_id); | |
6439 | LIST_HEAD(reaplist); | |
6440 | ||
6441 | if (!nfsd_netns_ready(nn)) | |
6442 | return count; | |
6443 | ||
6444 | spin_lock(&nn->client_lock); | |
6445 | clp = nfsd_find_client(addr, addr_size); | |
6446 | if (clp) | |
6447 | count = nfsd_find_all_delegations(clp, 0, &reaplist); | |
6448 | spin_unlock(&nn->client_lock); | |
6449 | ||
6450 | nfsd_recall_delegations(&reaplist); | |
269de30f BS |
6451 | return count; |
6452 | } | |
6453 | ||
98d5c7c5 | 6454 | u64 |
285abdee | 6455 | nfsd_inject_recall_delegations(u64 max) |
184c1847 BS |
6456 | { |
6457 | u64 count = 0; | |
98d5c7c5 JL |
6458 | struct nfs4_client *clp, *next; |
6459 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6460 | nfsd_net_id); | |
6461 | LIST_HEAD(reaplist); | |
184c1847 | 6462 | |
98d5c7c5 JL |
6463 | if (!nfsd_netns_ready(nn)) |
6464 | return count; | |
184c1847 | 6465 | |
98d5c7c5 JL |
6466 | spin_lock(&nn->client_lock); |
6467 | list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { | |
6468 | count += nfsd_find_all_delegations(clp, max - count, &reaplist); | |
6469 | if (max != 0 && ++count >= max) | |
6470 | break; | |
6471 | } | |
6472 | spin_unlock(&nn->client_lock); | |
6473 | nfsd_recall_delegations(&reaplist); | |
184c1847 BS |
6474 | return count; |
6475 | } | |
65178db4 BS |
6476 | #endif /* CONFIG_NFSD_FAULT_INJECTION */ |
6477 | ||
c2f1a551 MS |
6478 | /* |
6479 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
6480 | * client may quite reasonably hang on to a delegation as long as it has | |
6481 | * the inode cached. This becomes an obvious problem the first time a | |
6482 | * client's inode cache approaches the size of the server's total memory. | |
6483 | * | |
6484 | * For now we avoid this problem by imposing a hard limit on the number | |
6485 | * of delegations, which varies according to the server's memory size. | |
6486 | */ | |
6487 | static void | |
6488 | set_max_delegations(void) | |
6489 | { | |
6490 | /* | |
6491 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
6492 | * estimates suggest that in the worst case (where every delegation | |
6493 | * is for a different inode), a delegation could take about 1.5K, | |
6494 | * giving a worst case usage of about 6% of memory. | |
6495 | */ | |
6496 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
6497 | } | |
6498 | ||
d85ed443 | 6499 | static int nfs4_state_create_net(struct net *net) |
8daae4dc SK |
6500 | { |
6501 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
6502 | int i; | |
6503 | ||
6504 | nn->conf_id_hashtbl = kmalloc(sizeof(struct list_head) * | |
6505 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
6506 | if (!nn->conf_id_hashtbl) | |
382a62e7 | 6507 | goto err; |
0a7ec377 SK |
6508 | nn->unconf_id_hashtbl = kmalloc(sizeof(struct list_head) * |
6509 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
6510 | if (!nn->unconf_id_hashtbl) | |
6511 | goto err_unconf_id; | |
1872de0e SK |
6512 | nn->sessionid_hashtbl = kmalloc(sizeof(struct list_head) * |
6513 | SESSION_HASH_SIZE, GFP_KERNEL); | |
6514 | if (!nn->sessionid_hashtbl) | |
6515 | goto err_sessionid; | |
8daae4dc | 6516 | |
382a62e7 | 6517 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
8daae4dc | 6518 | INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]); |
0a7ec377 | 6519 | INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]); |
382a62e7 | 6520 | } |
1872de0e SK |
6521 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
6522 | INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]); | |
382a62e7 | 6523 | nn->conf_name_tree = RB_ROOT; |
a99454aa | 6524 | nn->unconf_name_tree = RB_ROOT; |
5ed58bb2 | 6525 | INIT_LIST_HEAD(&nn->client_lru); |
73758fed | 6526 | INIT_LIST_HEAD(&nn->close_lru); |
e8c69d17 | 6527 | INIT_LIST_HEAD(&nn->del_recall_lru); |
c9a49628 | 6528 | spin_lock_init(&nn->client_lock); |
8daae4dc | 6529 | |
09121281 | 6530 | INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main); |
d85ed443 | 6531 | get_net(net); |
09121281 | 6532 | |
8daae4dc | 6533 | return 0; |
382a62e7 | 6534 | |
1872de0e | 6535 | err_sessionid: |
9b531137 | 6536 | kfree(nn->unconf_id_hashtbl); |
0a7ec377 SK |
6537 | err_unconf_id: |
6538 | kfree(nn->conf_id_hashtbl); | |
382a62e7 SK |
6539 | err: |
6540 | return -ENOMEM; | |
8daae4dc SK |
6541 | } |
6542 | ||
6543 | static void | |
4dce0ac9 | 6544 | nfs4_state_destroy_net(struct net *net) |
8daae4dc SK |
6545 | { |
6546 | int i; | |
6547 | struct nfs4_client *clp = NULL; | |
6548 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
6549 | ||
6550 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { | |
6551 | while (!list_empty(&nn->conf_id_hashtbl[i])) { | |
6552 | clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
6553 | destroy_client(clp); | |
6554 | } | |
6555 | } | |
a99454aa | 6556 | |
2b905635 KM |
6557 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
6558 | while (!list_empty(&nn->unconf_id_hashtbl[i])) { | |
6559 | clp = list_entry(nn->unconf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
6560 | destroy_client(clp); | |
6561 | } | |
a99454aa SK |
6562 | } |
6563 | ||
1872de0e | 6564 | kfree(nn->sessionid_hashtbl); |
0a7ec377 | 6565 | kfree(nn->unconf_id_hashtbl); |
8daae4dc | 6566 | kfree(nn->conf_id_hashtbl); |
4dce0ac9 | 6567 | put_net(net); |
8daae4dc SK |
6568 | } |
6569 | ||
f252bc68 | 6570 | int |
d85ed443 | 6571 | nfs4_state_start_net(struct net *net) |
ac4d8ff2 | 6572 | { |
5e1533c7 | 6573 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b5a1a81e BF |
6574 | int ret; |
6575 | ||
d85ed443 | 6576 | ret = nfs4_state_create_net(net); |
8daae4dc SK |
6577 | if (ret) |
6578 | return ret; | |
2c142baa | 6579 | nn->boot_time = get_seconds(); |
a51c84ed | 6580 | nn->grace_ended = false; |
d4318acd JL |
6581 | locks_start_grace(net, &nn->nfsd4_manager); |
6582 | nfsd4_client_tracking_init(net); | |
d85ed443 | 6583 | printk(KERN_INFO "NFSD: starting %ld-second grace period (net %p)\n", |
5284b44e SK |
6584 | nn->nfsd4_grace, net); |
6585 | queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ); | |
d85ed443 SK |
6586 | return 0; |
6587 | } | |
6588 | ||
6589 | /* initialization to perform when the nfsd service is started: */ | |
6590 | ||
6591 | int | |
6592 | nfs4_state_start(void) | |
6593 | { | |
6594 | int ret; | |
6595 | ||
b5a1a81e | 6596 | ret = set_callback_cred(); |
d85ed443 SK |
6597 | if (ret) |
6598 | return -ENOMEM; | |
58da282b | 6599 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
a6d6b781 JL |
6600 | if (laundry_wq == NULL) { |
6601 | ret = -ENOMEM; | |
6602 | goto out_recovery; | |
6603 | } | |
b5a1a81e BF |
6604 | ret = nfsd4_create_callback_queue(); |
6605 | if (ret) | |
6606 | goto out_free_laundry; | |
09121281 | 6607 | |
c2f1a551 | 6608 | set_max_delegations(); |
d85ed443 | 6609 | |
b5a1a81e | 6610 | return 0; |
d85ed443 | 6611 | |
b5a1a81e BF |
6612 | out_free_laundry: |
6613 | destroy_workqueue(laundry_wq); | |
a6d6b781 | 6614 | out_recovery: |
b5a1a81e | 6615 | return ret; |
1da177e4 LT |
6616 | } |
6617 | ||
f252bc68 | 6618 | void |
4dce0ac9 | 6619 | nfs4_state_shutdown_net(struct net *net) |
1da177e4 | 6620 | { |
1da177e4 | 6621 | struct nfs4_delegation *dp = NULL; |
1da177e4 | 6622 | struct list_head *pos, *next, reaplist; |
4dce0ac9 | 6623 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
1da177e4 | 6624 | |
4dce0ac9 SK |
6625 | cancel_delayed_work_sync(&nn->laundromat_work); |
6626 | locks_end_grace(&nn->nfsd4_manager); | |
ac55fdc4 | 6627 | |
1da177e4 | 6628 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 6629 | spin_lock(&state_lock); |
e8c69d17 | 6630 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 | 6631 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
42690676 JL |
6632 | unhash_delegation_locked(dp); |
6633 | list_add(&dp->dl_recall_lru, &reaplist); | |
1da177e4 | 6634 | } |
cdc97505 | 6635 | spin_unlock(&state_lock); |
1da177e4 LT |
6636 | list_for_each_safe(pos, next, &reaplist) { |
6637 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
42690676 | 6638 | list_del_init(&dp->dl_recall_lru); |
8287f009 | 6639 | put_clnt_odstate(dp->dl_clnt_odstate); |
afbda402 | 6640 | nfs4_put_deleg_lease(dp->dl_stid.sc_file); |
6011695d | 6641 | nfs4_put_stid(&dp->dl_stid); |
1da177e4 LT |
6642 | } |
6643 | ||
3320fef1 | 6644 | nfsd4_client_tracking_exit(net); |
4dce0ac9 | 6645 | nfs4_state_destroy_net(net); |
1da177e4 LT |
6646 | } |
6647 | ||
6648 | void | |
6649 | nfs4_state_shutdown(void) | |
6650 | { | |
5e8d5c29 | 6651 | destroy_workqueue(laundry_wq); |
c3935e30 | 6652 | nfsd4_destroy_callback_queue(); |
1da177e4 | 6653 | } |
8b70484c TM |
6654 | |
6655 | static void | |
6656 | get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
6657 | { | |
37c593c5 TM |
6658 | if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) |
6659 | memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); | |
8b70484c TM |
6660 | } |
6661 | ||
6662 | static void | |
6663 | put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
6664 | { | |
37c593c5 TM |
6665 | if (cstate->minorversion) { |
6666 | memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); | |
6667 | SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
6668 | } | |
6669 | } | |
6670 | ||
6671 | void | |
6672 | clear_current_stateid(struct nfsd4_compound_state *cstate) | |
6673 | { | |
6674 | CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
8b70484c TM |
6675 | } |
6676 | ||
62cd4a59 TM |
6677 | /* |
6678 | * functions to set current state id | |
6679 | */ | |
9428fe1a TM |
6680 | void |
6681 | nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
6682 | { | |
6683 | put_stateid(cstate, &odp->od_stateid); | |
6684 | } | |
6685 | ||
8b70484c TM |
6686 | void |
6687 | nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) | |
6688 | { | |
6689 | put_stateid(cstate, &open->op_stateid); | |
6690 | } | |
6691 | ||
62cd4a59 TM |
6692 | void |
6693 | nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
6694 | { | |
6695 | put_stateid(cstate, &close->cl_stateid); | |
6696 | } | |
6697 | ||
6698 | void | |
6699 | nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) | |
6700 | { | |
6701 | put_stateid(cstate, &lock->lk_resp_stateid); | |
6702 | } | |
6703 | ||
6704 | /* | |
6705 | * functions to consume current state id | |
6706 | */ | |
1e97b519 | 6707 | |
9428fe1a TM |
6708 | void |
6709 | nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
6710 | { | |
6711 | get_stateid(cstate, &odp->od_stateid); | |
6712 | } | |
6713 | ||
6714 | void | |
6715 | nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) | |
6716 | { | |
6717 | get_stateid(cstate, &drp->dr_stateid); | |
6718 | } | |
6719 | ||
1e97b519 TM |
6720 | void |
6721 | nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) | |
6722 | { | |
6723 | get_stateid(cstate, &fsp->fr_stateid); | |
6724 | } | |
6725 | ||
6726 | void | |
6727 | nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) | |
6728 | { | |
6729 | get_stateid(cstate, &setattr->sa_stateid); | |
6730 | } | |
6731 | ||
8b70484c TM |
6732 | void |
6733 | nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
6734 | { | |
6735 | get_stateid(cstate, &close->cl_stateid); | |
6736 | } | |
6737 | ||
6738 | void | |
62cd4a59 | 6739 | nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) |
8b70484c | 6740 | { |
62cd4a59 | 6741 | get_stateid(cstate, &locku->lu_stateid); |
8b70484c | 6742 | } |
30813e27 TM |
6743 | |
6744 | void | |
6745 | nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) | |
6746 | { | |
6747 | get_stateid(cstate, &read->rd_stateid); | |
6748 | } | |
6749 | ||
6750 | void | |
6751 | nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) | |
6752 | { | |
6753 | get_stateid(cstate, &write->wr_stateid); | |
6754 | } |