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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 | ||
6b180f0b JL |
993 | static void nfs4_put_stateowner(struct nfs4_stateowner *sop) |
994 | { | |
a819ecc1 JL |
995 | struct nfs4_client *clp = sop->so_client; |
996 | ||
997 | might_lock(&clp->cl_lock); | |
998 | ||
999 | if (!atomic_dec_and_lock(&sop->so_count, &clp->cl_lock)) | |
6b180f0b | 1000 | return; |
8f4b54c5 | 1001 | sop->so_ops->so_unhash(sop); |
a819ecc1 | 1002 | spin_unlock(&clp->cl_lock); |
6b180f0b JL |
1003 | kfree(sop->so_owner.data); |
1004 | sop->so_ops->so_free(sop); | |
1005 | } | |
1006 | ||
4ae098d3 | 1007 | static void unhash_ol_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 1008 | { |
11b9164a | 1009 | struct nfs4_file *fp = stp->st_stid.sc_file; |
1d31a253 | 1010 | |
1c755dc1 JL |
1011 | lockdep_assert_held(&stp->st_stateowner->so_client->cl_lock); |
1012 | ||
1d31a253 | 1013 | spin_lock(&fp->fi_lock); |
529d7b2a | 1014 | list_del(&stp->st_perfile); |
1d31a253 | 1015 | spin_unlock(&fp->fi_lock); |
529d7b2a BF |
1016 | list_del(&stp->st_perstateowner); |
1017 | } | |
1018 | ||
6011695d | 1019 | static void nfs4_free_ol_stateid(struct nfs4_stid *stid) |
529d7b2a | 1020 | { |
6011695d | 1021 | struct nfs4_ol_stateid *stp = openlockstateid(stid); |
4665e2ba | 1022 | |
8287f009 | 1023 | put_clnt_odstate(stp->st_clnt_odstate); |
6011695d | 1024 | release_all_access(stp); |
d3134b10 JL |
1025 | if (stp->st_stateowner) |
1026 | nfs4_put_stateowner(stp->st_stateowner); | |
6011695d | 1027 | kmem_cache_free(stateid_slab, stid); |
529d7b2a BF |
1028 | } |
1029 | ||
b49e084d | 1030 | static void nfs4_free_lock_stateid(struct nfs4_stid *stid) |
529d7b2a | 1031 | { |
b49e084d JL |
1032 | struct nfs4_ol_stateid *stp = openlockstateid(stid); |
1033 | struct nfs4_lockowner *lo = lockowner(stp->st_stateowner); | |
529d7b2a BF |
1034 | struct file *file; |
1035 | ||
b49e084d JL |
1036 | file = find_any_file(stp->st_stid.sc_file); |
1037 | if (file) | |
1038 | filp_close(file, (fl_owner_t)lo); | |
1039 | nfs4_free_ol_stateid(stid); | |
1040 | } | |
1041 | ||
2c41beb0 JL |
1042 | /* |
1043 | * Put the persistent reference to an already unhashed generic stateid, while | |
1044 | * holding the cl_lock. If it's the last reference, then put it onto the | |
1045 | * reaplist for later destruction. | |
1046 | */ | |
1047 | static void put_ol_stateid_locked(struct nfs4_ol_stateid *stp, | |
1048 | struct list_head *reaplist) | |
1049 | { | |
1050 | struct nfs4_stid *s = &stp->st_stid; | |
1051 | struct nfs4_client *clp = s->sc_client; | |
1052 | ||
1053 | lockdep_assert_held(&clp->cl_lock); | |
1054 | ||
1055 | WARN_ON_ONCE(!list_empty(&stp->st_locks)); | |
1056 | ||
1057 | if (!atomic_dec_and_test(&s->sc_count)) { | |
1058 | wake_up_all(&close_wq); | |
1059 | return; | |
1060 | } | |
1061 | ||
1062 | idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id); | |
1063 | list_add(&stp->st_locks, reaplist); | |
1064 | } | |
1065 | ||
3c1c995c | 1066 | static void unhash_lock_stateid(struct nfs4_ol_stateid *stp) |
b49e084d | 1067 | { |
1c755dc1 JL |
1068 | struct nfs4_openowner *oo = openowner(stp->st_openstp->st_stateowner); |
1069 | ||
3c1c995c JL |
1070 | lockdep_assert_held(&oo->oo_owner.so_client->cl_lock); |
1071 | ||
1072 | list_del_init(&stp->st_locks); | |
4ae098d3 | 1073 | unhash_ol_stateid(stp); |
cd61c522 | 1074 | nfs4_unhash_stid(&stp->st_stid); |
3c1c995c JL |
1075 | } |
1076 | ||
1077 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) | |
1078 | { | |
1079 | struct nfs4_openowner *oo = openowner(stp->st_openstp->st_stateowner); | |
1080 | ||
1081 | spin_lock(&oo->oo_owner.so_client->cl_lock); | |
1082 | unhash_lock_stateid(stp); | |
1c755dc1 | 1083 | spin_unlock(&oo->oo_owner.so_client->cl_lock); |
6011695d | 1084 | nfs4_put_stid(&stp->st_stid); |
529d7b2a BF |
1085 | } |
1086 | ||
c58c6610 | 1087 | static void unhash_lockowner_locked(struct nfs4_lockowner *lo) |
8f4b54c5 | 1088 | { |
d4f0489f | 1089 | struct nfs4_client *clp = lo->lo_owner.so_client; |
c58c6610 | 1090 | |
d4f0489f | 1091 | lockdep_assert_held(&clp->cl_lock); |
c58c6610 | 1092 | |
8f4b54c5 JL |
1093 | list_del_init(&lo->lo_owner.so_strhash); |
1094 | } | |
1095 | ||
2c41beb0 JL |
1096 | /* |
1097 | * Free a list of generic stateids that were collected earlier after being | |
1098 | * fully unhashed. | |
1099 | */ | |
1100 | static void | |
1101 | free_ol_stateid_reaplist(struct list_head *reaplist) | |
1102 | { | |
1103 | struct nfs4_ol_stateid *stp; | |
fb94d766 | 1104 | struct nfs4_file *fp; |
2c41beb0 JL |
1105 | |
1106 | might_sleep(); | |
1107 | ||
1108 | while (!list_empty(reaplist)) { | |
1109 | stp = list_first_entry(reaplist, struct nfs4_ol_stateid, | |
1110 | st_locks); | |
1111 | list_del(&stp->st_locks); | |
fb94d766 | 1112 | fp = stp->st_stid.sc_file; |
2c41beb0 | 1113 | stp->st_stid.sc_free(&stp->st_stid); |
fb94d766 KM |
1114 | if (fp) |
1115 | put_nfs4_file(fp); | |
2c41beb0 JL |
1116 | } |
1117 | } | |
1118 | ||
3c1c995c | 1119 | static void release_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 1120 | { |
d4f0489f | 1121 | struct nfs4_client *clp = lo->lo_owner.so_client; |
dcef0413 | 1122 | struct nfs4_ol_stateid *stp; |
3c1c995c | 1123 | struct list_head reaplist; |
529d7b2a | 1124 | |
3c1c995c | 1125 | INIT_LIST_HEAD(&reaplist); |
c58c6610 | 1126 | |
3c1c995c JL |
1127 | spin_lock(&clp->cl_lock); |
1128 | unhash_lockowner_locked(lo); | |
fe0750e5 BF |
1129 | while (!list_empty(&lo->lo_owner.so_stateids)) { |
1130 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
dcef0413 | 1131 | struct nfs4_ol_stateid, st_perstateowner); |
3c1c995c | 1132 | unhash_lock_stateid(stp); |
2c41beb0 | 1133 | put_ol_stateid_locked(stp, &reaplist); |
529d7b2a | 1134 | } |
d4f0489f | 1135 | spin_unlock(&clp->cl_lock); |
2c41beb0 | 1136 | free_ol_stateid_reaplist(&reaplist); |
6b180f0b | 1137 | nfs4_put_stateowner(&lo->lo_owner); |
529d7b2a BF |
1138 | } |
1139 | ||
d83017f9 JL |
1140 | static void release_open_stateid_locks(struct nfs4_ol_stateid *open_stp, |
1141 | struct list_head *reaplist) | |
3c87b9b7 TM |
1142 | { |
1143 | struct nfs4_ol_stateid *stp; | |
1144 | ||
1145 | while (!list_empty(&open_stp->st_locks)) { | |
1146 | stp = list_entry(open_stp->st_locks.next, | |
1147 | struct nfs4_ol_stateid, st_locks); | |
d83017f9 JL |
1148 | unhash_lock_stateid(stp); |
1149 | put_ol_stateid_locked(stp, reaplist); | |
529d7b2a BF |
1150 | } |
1151 | } | |
1152 | ||
d83017f9 JL |
1153 | static void unhash_open_stateid(struct nfs4_ol_stateid *stp, |
1154 | struct list_head *reaplist) | |
2283963f | 1155 | { |
2c41beb0 JL |
1156 | lockdep_assert_held(&stp->st_stid.sc_client->cl_lock); |
1157 | ||
4ae098d3 | 1158 | unhash_ol_stateid(stp); |
d83017f9 | 1159 | release_open_stateid_locks(stp, reaplist); |
38c387b5 BF |
1160 | } |
1161 | ||
1162 | static void release_open_stateid(struct nfs4_ol_stateid *stp) | |
1163 | { | |
2c41beb0 JL |
1164 | LIST_HEAD(reaplist); |
1165 | ||
1166 | spin_lock(&stp->st_stid.sc_client->cl_lock); | |
d83017f9 | 1167 | unhash_open_stateid(stp, &reaplist); |
2c41beb0 JL |
1168 | put_ol_stateid_locked(stp, &reaplist); |
1169 | spin_unlock(&stp->st_stid.sc_client->cl_lock); | |
1170 | free_ol_stateid_reaplist(&reaplist); | |
2283963f BF |
1171 | } |
1172 | ||
7ffb5880 | 1173 | static void unhash_openowner_locked(struct nfs4_openowner *oo) |
f1d110ca | 1174 | { |
d4f0489f | 1175 | struct nfs4_client *clp = oo->oo_owner.so_client; |
7ffb5880 | 1176 | |
d4f0489f | 1177 | lockdep_assert_held(&clp->cl_lock); |
7ffb5880 | 1178 | |
8f4b54c5 JL |
1179 | list_del_init(&oo->oo_owner.so_strhash); |
1180 | list_del_init(&oo->oo_perclient); | |
f1d110ca BF |
1181 | } |
1182 | ||
f7a4d872 BF |
1183 | static void release_last_closed_stateid(struct nfs4_openowner *oo) |
1184 | { | |
217526e7 JL |
1185 | struct nfsd_net *nn = net_generic(oo->oo_owner.so_client->net, |
1186 | nfsd_net_id); | |
1187 | struct nfs4_ol_stateid *s; | |
f7a4d872 | 1188 | |
217526e7 JL |
1189 | spin_lock(&nn->client_lock); |
1190 | s = oo->oo_last_closed_stid; | |
f7a4d872 | 1191 | if (s) { |
d3134b10 | 1192 | list_del_init(&oo->oo_close_lru); |
f7a4d872 BF |
1193 | oo->oo_last_closed_stid = NULL; |
1194 | } | |
217526e7 JL |
1195 | spin_unlock(&nn->client_lock); |
1196 | if (s) | |
1197 | nfs4_put_stid(&s->st_stid); | |
f7a4d872 BF |
1198 | } |
1199 | ||
2c41beb0 | 1200 | static void release_openowner(struct nfs4_openowner *oo) |
8f4b54c5 JL |
1201 | { |
1202 | struct nfs4_ol_stateid *stp; | |
d4f0489f | 1203 | struct nfs4_client *clp = oo->oo_owner.so_client; |
2c41beb0 | 1204 | struct list_head reaplist; |
7ffb5880 | 1205 | |
2c41beb0 | 1206 | INIT_LIST_HEAD(&reaplist); |
8f4b54c5 | 1207 | |
2c41beb0 JL |
1208 | spin_lock(&clp->cl_lock); |
1209 | unhash_openowner_locked(oo); | |
8f4b54c5 JL |
1210 | while (!list_empty(&oo->oo_owner.so_stateids)) { |
1211 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
1212 | struct nfs4_ol_stateid, st_perstateowner); | |
d83017f9 | 1213 | unhash_open_stateid(stp, &reaplist); |
2c41beb0 | 1214 | put_ol_stateid_locked(stp, &reaplist); |
8f4b54c5 | 1215 | } |
d4f0489f | 1216 | spin_unlock(&clp->cl_lock); |
2c41beb0 | 1217 | free_ol_stateid_reaplist(&reaplist); |
f7a4d872 | 1218 | release_last_closed_stateid(oo); |
6b180f0b | 1219 | nfs4_put_stateowner(&oo->oo_owner); |
f1d110ca BF |
1220 | } |
1221 | ||
5282fd72 ME |
1222 | static inline int |
1223 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
1224 | { | |
1225 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
1226 | ||
1227 | return sid->sequence % SESSION_HASH_SIZE; | |
1228 | } | |
1229 | ||
135dd002 | 1230 | #ifdef CONFIG_SUNRPC_DEBUG |
5282fd72 ME |
1231 | static inline void |
1232 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
1233 | { | |
1234 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
1235 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
1236 | } | |
8f199b82 TM |
1237 | #else |
1238 | static inline void | |
1239 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
1240 | { | |
1241 | } | |
1242 | #endif | |
1243 | ||
9411b1d4 BF |
1244 | /* |
1245 | * Bump the seqid on cstate->replay_owner, and clear replay_owner if it | |
1246 | * won't be used for replay. | |
1247 | */ | |
1248 | void nfsd4_bump_seqid(struct nfsd4_compound_state *cstate, __be32 nfserr) | |
1249 | { | |
1250 | struct nfs4_stateowner *so = cstate->replay_owner; | |
1251 | ||
1252 | if (nfserr == nfserr_replay_me) | |
1253 | return; | |
1254 | ||
1255 | if (!seqid_mutating_err(ntohl(nfserr))) { | |
58fb12e6 | 1256 | nfsd4_cstate_clear_replay(cstate); |
9411b1d4 BF |
1257 | return; |
1258 | } | |
1259 | if (!so) | |
1260 | return; | |
1261 | if (so->so_is_open_owner) | |
1262 | release_last_closed_stateid(openowner(so)); | |
1263 | so->so_seqid++; | |
1264 | return; | |
1265 | } | |
5282fd72 | 1266 | |
ec6b5d7b AA |
1267 | static void |
1268 | gen_sessionid(struct nfsd4_session *ses) | |
1269 | { | |
1270 | struct nfs4_client *clp = ses->se_client; | |
1271 | struct nfsd4_sessionid *sid; | |
1272 | ||
1273 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
1274 | sid->clientid = clp->cl_clientid; | |
1275 | sid->sequence = current_sessionid++; | |
1276 | sid->reserved = 0; | |
1277 | } | |
1278 | ||
1279 | /* | |
a649637c AA |
1280 | * The protocol defines ca_maxresponssize_cached to include the size of |
1281 | * the rpc header, but all we need to cache is the data starting after | |
1282 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
1283 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
1284 | * value that is the number of bytes in our cache plus a few additional | |
1285 | * bytes. In order to stay on the safe side, and not promise more than | |
1286 | * we can cache, those additional bytes must be the minimum possible: 24 | |
1287 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
1288 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
1289 | * for the SEQUENCE op response: | |
1290 | */ | |
1291 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
1292 | ||
557ce264 AA |
1293 | static void |
1294 | free_session_slots(struct nfsd4_session *ses) | |
1295 | { | |
1296 | int i; | |
1297 | ||
1298 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
1299 | kfree(ses->se_slots[i]); | |
1300 | } | |
1301 | ||
a649637c | 1302 | /* |
efe0cb6d BF |
1303 | * We don't actually need to cache the rpc and session headers, so we |
1304 | * can allocate a little less for each slot: | |
1305 | */ | |
55c760cf | 1306 | static inline u32 slot_bytes(struct nfsd4_channel_attrs *ca) |
efe0cb6d | 1307 | { |
55c760cf | 1308 | u32 size; |
efe0cb6d | 1309 | |
55c760cf BF |
1310 | if (ca->maxresp_cached < NFSD_MIN_HDR_SEQ_SZ) |
1311 | size = 0; | |
1312 | else | |
1313 | size = ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
1314 | return size + sizeof(struct nfsd4_slot); | |
5b6feee9 | 1315 | } |
ec6b5d7b | 1316 | |
5b6feee9 BF |
1317 | /* |
1318 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c | 1319 | * re-negotiate active sessions and reduce their slot usage to make |
42b2aa86 | 1320 | * room for new connections. For now we just fail the create session. |
ec6b5d7b | 1321 | */ |
55c760cf | 1322 | static u32 nfsd4_get_drc_mem(struct nfsd4_channel_attrs *ca) |
ec6b5d7b | 1323 | { |
55c760cf BF |
1324 | u32 slotsize = slot_bytes(ca); |
1325 | u32 num = ca->maxreqs; | |
5b6feee9 | 1326 | int avail; |
ec6b5d7b | 1327 | |
5b6feee9 | 1328 | spin_lock(&nfsd_drc_lock); |
697ce9be ZY |
1329 | avail = min((unsigned long)NFSD_MAX_MEM_PER_SESSION, |
1330 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
5b6feee9 BF |
1331 | num = min_t(int, num, avail / slotsize); |
1332 | nfsd_drc_mem_used += num * slotsize; | |
1333 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 1334 | |
5b6feee9 BF |
1335 | return num; |
1336 | } | |
ec6b5d7b | 1337 | |
55c760cf | 1338 | static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs *ca) |
5b6feee9 | 1339 | { |
55c760cf BF |
1340 | int slotsize = slot_bytes(ca); |
1341 | ||
4bd9b0f4 | 1342 | spin_lock(&nfsd_drc_lock); |
55c760cf | 1343 | nfsd_drc_mem_used -= slotsize * ca->maxreqs; |
4bd9b0f4 | 1344 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 1345 | } |
ec6b5d7b | 1346 | |
60810e54 KM |
1347 | static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fattrs, |
1348 | struct nfsd4_channel_attrs *battrs) | |
5b6feee9 | 1349 | { |
60810e54 KM |
1350 | int numslots = fattrs->maxreqs; |
1351 | int slotsize = slot_bytes(fattrs); | |
5b6feee9 BF |
1352 | struct nfsd4_session *new; |
1353 | int mem, i; | |
a649637c | 1354 | |
5b6feee9 BF |
1355 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
1356 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
1357 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 1358 | |
5b6feee9 BF |
1359 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
1360 | if (!new) | |
1361 | return NULL; | |
557ce264 | 1362 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 | 1363 | for (i = 0; i < numslots; i++) { |
55c760cf | 1364 | new->se_slots[i] = kzalloc(slotsize, GFP_KERNEL); |
5b6feee9 | 1365 | if (!new->se_slots[i]) |
557ce264 | 1366 | goto out_free; |
557ce264 | 1367 | } |
60810e54 KM |
1368 | |
1369 | memcpy(&new->se_fchannel, fattrs, sizeof(struct nfsd4_channel_attrs)); | |
1370 | memcpy(&new->se_bchannel, battrs, sizeof(struct nfsd4_channel_attrs)); | |
1371 | ||
5b6feee9 BF |
1372 | return new; |
1373 | out_free: | |
1374 | while (i--) | |
1375 | kfree(new->se_slots[i]); | |
1376 | kfree(new); | |
1377 | return NULL; | |
ec6b5d7b AA |
1378 | } |
1379 | ||
19cf5c02 BF |
1380 | static void free_conn(struct nfsd4_conn *c) |
1381 | { | |
1382 | svc_xprt_put(c->cn_xprt); | |
1383 | kfree(c); | |
1384 | } | |
ec6b5d7b | 1385 | |
19cf5c02 BF |
1386 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
1387 | { | |
1388 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
1389 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 1390 | |
19cf5c02 BF |
1391 | spin_lock(&clp->cl_lock); |
1392 | if (!list_empty(&c->cn_persession)) { | |
1393 | list_del(&c->cn_persession); | |
1394 | free_conn(c); | |
1395 | } | |
eea49806 | 1396 | nfsd4_probe_callback(clp); |
2e4b7239 | 1397 | spin_unlock(&clp->cl_lock); |
19cf5c02 | 1398 | } |
ec6b5d7b | 1399 | |
d29c374c | 1400 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 1401 | { |
c7662518 | 1402 | struct nfsd4_conn *conn; |
ec6b5d7b | 1403 | |
c7662518 BF |
1404 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
1405 | if (!conn) | |
db90681d | 1406 | return NULL; |
c7662518 BF |
1407 | svc_xprt_get(rqstp->rq_xprt); |
1408 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 1409 | conn->cn_flags = flags; |
db90681d BF |
1410 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
1411 | return conn; | |
1412 | } | |
a649637c | 1413 | |
328ead28 BF |
1414 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
1415 | { | |
1416 | conn->cn_session = ses; | |
1417 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
1418 | } |
1419 | ||
db90681d | 1420 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 1421 | { |
db90681d | 1422 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 1423 | |
c7662518 | 1424 | spin_lock(&clp->cl_lock); |
328ead28 | 1425 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 1426 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
1427 | } |
1428 | ||
21b75b01 | 1429 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 1430 | { |
19cf5c02 | 1431 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 1432 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
1433 | } |
1434 | ||
e1ff371f | 1435 | static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses) |
ec6b5d7b | 1436 | { |
21b75b01 | 1437 | int ret; |
ec6b5d7b | 1438 | |
db90681d | 1439 | nfsd4_hash_conn(conn, ses); |
21b75b01 BF |
1440 | ret = nfsd4_register_conn(conn); |
1441 | if (ret) | |
1442 | /* oops; xprt is already down: */ | |
1443 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
57a37144 BF |
1444 | /* We may have gained or lost a callback channel: */ |
1445 | nfsd4_probe_callback_sync(ses->se_client); | |
c7662518 | 1446 | } |
ec6b5d7b | 1447 | |
e1ff371f | 1448 | static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses) |
1d1bc8f2 BF |
1449 | { |
1450 | u32 dir = NFS4_CDFC4_FORE; | |
1451 | ||
e1ff371f | 1452 | if (cses->flags & SESSION4_BACK_CHAN) |
1d1bc8f2 | 1453 | dir |= NFS4_CDFC4_BACK; |
e1ff371f | 1454 | return alloc_conn(rqstp, dir); |
1d1bc8f2 BF |
1455 | } |
1456 | ||
1457 | /* must be called under client_lock */ | |
19cf5c02 | 1458 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 1459 | { |
19cf5c02 BF |
1460 | struct nfs4_client *clp = s->se_client; |
1461 | struct nfsd4_conn *c; | |
ec6b5d7b | 1462 | |
19cf5c02 BF |
1463 | spin_lock(&clp->cl_lock); |
1464 | while (!list_empty(&s->se_conns)) { | |
1465 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
1466 | list_del_init(&c->cn_persession); | |
1467 | spin_unlock(&clp->cl_lock); | |
557ce264 | 1468 | |
19cf5c02 BF |
1469 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
1470 | free_conn(c); | |
ec6b5d7b | 1471 | |
19cf5c02 BF |
1472 | spin_lock(&clp->cl_lock); |
1473 | } | |
1474 | spin_unlock(&clp->cl_lock); | |
c7662518 | 1475 | } |
ec6b5d7b | 1476 | |
1377b69e BF |
1477 | static void __free_session(struct nfsd4_session *ses) |
1478 | { | |
1377b69e BF |
1479 | free_session_slots(ses); |
1480 | kfree(ses); | |
1481 | } | |
1482 | ||
66b2b9b2 | 1483 | static void free_session(struct nfsd4_session *ses) |
c7662518 | 1484 | { |
19cf5c02 | 1485 | nfsd4_del_conns(ses); |
55c760cf | 1486 | nfsd4_put_drc_mem(&ses->se_fchannel); |
1377b69e | 1487 | __free_session(ses); |
c7662518 BF |
1488 | } |
1489 | ||
135ae827 | 1490 | static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
a827bcb2 | 1491 | { |
a827bcb2 | 1492 | int idx; |
1872de0e | 1493 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
a827bcb2 | 1494 | |
ec6b5d7b AA |
1495 | new->se_client = clp; |
1496 | gen_sessionid(new); | |
ec6b5d7b | 1497 | |
c7662518 BF |
1498 | INIT_LIST_HEAD(&new->se_conns); |
1499 | ||
ac7c46f2 | 1500 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 1501 | new->se_flags = cses->flags; |
8b5ce5cd | 1502 | new->se_cb_prog = cses->callback_prog; |
c6bb3ca2 | 1503 | new->se_cb_sec = cses->cb_sec; |
66b2b9b2 | 1504 | atomic_set(&new->se_ref, 0); |
5b6feee9 | 1505 | idx = hash_sessionid(&new->se_sessionid); |
1872de0e | 1506 | list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]); |
4c649378 | 1507 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 1508 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 1509 | spin_unlock(&clp->cl_lock); |
60810e54 | 1510 | |
b0d2e42c | 1511 | { |
edd76786 | 1512 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
1513 | /* |
1514 | * This is a little silly; with sessions there's no real | |
1515 | * use for the callback address. Use the peer address | |
1516 | * as a reasonable default for now, but consider fixing | |
1517 | * the rpc client not to require an address in the | |
1518 | * future: | |
1519 | */ | |
edd76786 BF |
1520 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
1521 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 1522 | } |
ec6b5d7b AA |
1523 | } |
1524 | ||
9089f1b4 | 1525 | /* caller must hold client_lock */ |
5282fd72 | 1526 | static struct nfsd4_session * |
d4e19e70 | 1527 | __find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net) |
5282fd72 ME |
1528 | { |
1529 | struct nfsd4_session *elem; | |
1530 | int idx; | |
1872de0e | 1531 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
5282fd72 | 1532 | |
0a880a28 TM |
1533 | lockdep_assert_held(&nn->client_lock); |
1534 | ||
5282fd72 ME |
1535 | dump_sessionid(__func__, sessionid); |
1536 | idx = hash_sessionid(sessionid); | |
5282fd72 | 1537 | /* Search in the appropriate list */ |
1872de0e | 1538 | list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) { |
5282fd72 ME |
1539 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
1540 | NFS4_MAX_SESSIONID_LEN)) { | |
1541 | return elem; | |
1542 | } | |
1543 | } | |
1544 | ||
1545 | dprintk("%s: session not found\n", __func__); | |
1546 | return NULL; | |
1547 | } | |
1548 | ||
d4e19e70 TM |
1549 | static struct nfsd4_session * |
1550 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net, | |
1551 | __be32 *ret) | |
1552 | { | |
1553 | struct nfsd4_session *session; | |
1554 | __be32 status = nfserr_badsession; | |
1555 | ||
1556 | session = __find_in_sessionid_hashtbl(sessionid, net); | |
1557 | if (!session) | |
1558 | goto out; | |
1559 | status = nfsd4_get_session_locked(session); | |
1560 | if (status) | |
1561 | session = NULL; | |
1562 | out: | |
1563 | *ret = status; | |
1564 | return session; | |
1565 | } | |
1566 | ||
9089f1b4 | 1567 | /* caller must hold client_lock */ |
7116ed6b | 1568 | static void |
5282fd72 | 1569 | unhash_session(struct nfsd4_session *ses) |
7116ed6b | 1570 | { |
0a880a28 TM |
1571 | struct nfs4_client *clp = ses->se_client; |
1572 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
1573 | ||
1574 | lockdep_assert_held(&nn->client_lock); | |
1575 | ||
7116ed6b | 1576 | list_del(&ses->se_hash); |
4c649378 | 1577 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 1578 | list_del(&ses->se_perclnt); |
4c649378 | 1579 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
1580 | } |
1581 | ||
1da177e4 LT |
1582 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
1583 | static int | |
2c142baa | 1584 | STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn) |
1da177e4 | 1585 | { |
bbc7f33a BF |
1586 | /* |
1587 | * We're assuming the clid was not given out from a boot | |
1588 | * precisely 2^32 (about 136 years) before this one. That seems | |
1589 | * a safe assumption: | |
1590 | */ | |
1591 | if (clid->cl_boot == (u32)nn->boot_time) | |
1da177e4 | 1592 | return 0; |
60adfc50 | 1593 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
2c142baa | 1594 | clid->cl_boot, clid->cl_id, nn->boot_time); |
1da177e4 LT |
1595 | return 1; |
1596 | } | |
1597 | ||
1598 | /* | |
1599 | * XXX Should we use a slab cache ? | |
1600 | * This type of memory management is somewhat inefficient, but we use it | |
1601 | * anyway since SETCLIENTID is not a common operation. | |
1602 | */ | |
35bba9a3 | 1603 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
1604 | { |
1605 | struct nfs4_client *clp; | |
d4f0489f | 1606 | int i; |
1da177e4 | 1607 | |
35bba9a3 BF |
1608 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
1609 | if (clp == NULL) | |
1610 | return NULL; | |
67114fe6 | 1611 | clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); |
d4f0489f TM |
1612 | if (clp->cl_name.data == NULL) |
1613 | goto err_no_name; | |
1614 | clp->cl_ownerstr_hashtbl = kmalloc(sizeof(struct list_head) * | |
1615 | OWNER_HASH_SIZE, GFP_KERNEL); | |
1616 | if (!clp->cl_ownerstr_hashtbl) | |
1617 | goto err_no_hashtbl; | |
1618 | for (i = 0; i < OWNER_HASH_SIZE; i++) | |
1619 | INIT_LIST_HEAD(&clp->cl_ownerstr_hashtbl[i]); | |
35bba9a3 | 1620 | clp->cl_name.len = name.len; |
5694c93e TM |
1621 | INIT_LIST_HEAD(&clp->cl_sessions); |
1622 | idr_init(&clp->cl_stateids); | |
1623 | atomic_set(&clp->cl_refcount, 0); | |
1624 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; | |
1625 | INIT_LIST_HEAD(&clp->cl_idhash); | |
1626 | INIT_LIST_HEAD(&clp->cl_openowners); | |
1627 | INIT_LIST_HEAD(&clp->cl_delegations); | |
1628 | INIT_LIST_HEAD(&clp->cl_lru); | |
5694c93e | 1629 | INIT_LIST_HEAD(&clp->cl_revoked); |
9cf514cc CH |
1630 | #ifdef CONFIG_NFSD_PNFS |
1631 | INIT_LIST_HEAD(&clp->cl_lo_states); | |
1632 | #endif | |
5694c93e TM |
1633 | spin_lock_init(&clp->cl_lock); |
1634 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1da177e4 | 1635 | return clp; |
d4f0489f TM |
1636 | err_no_hashtbl: |
1637 | kfree(clp->cl_name.data); | |
1638 | err_no_name: | |
1639 | kfree(clp); | |
1640 | return NULL; | |
1da177e4 LT |
1641 | } |
1642 | ||
4dd86e15 | 1643 | static void |
1da177e4 LT |
1644 | free_client(struct nfs4_client *clp) |
1645 | { | |
792c95dd BF |
1646 | while (!list_empty(&clp->cl_sessions)) { |
1647 | struct nfsd4_session *ses; | |
1648 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
1649 | se_perclnt); | |
1650 | list_del(&ses->se_perclnt); | |
66b2b9b2 BF |
1651 | WARN_ON_ONCE(atomic_read(&ses->se_ref)); |
1652 | free_session(ses); | |
792c95dd | 1653 | } |
4cb57e30 | 1654 | rpc_destroy_wait_queue(&clp->cl_cb_waitq); |
03a4e1f6 | 1655 | free_svc_cred(&clp->cl_cred); |
d4f0489f | 1656 | kfree(clp->cl_ownerstr_hashtbl); |
1da177e4 | 1657 | kfree(clp->cl_name.data); |
2d32b29a | 1658 | idr_destroy(&clp->cl_stateids); |
1da177e4 LT |
1659 | kfree(clp); |
1660 | } | |
1661 | ||
84d38ac9 | 1662 | /* must be called under the client_lock */ |
4beb345b | 1663 | static void |
84d38ac9 BH |
1664 | unhash_client_locked(struct nfs4_client *clp) |
1665 | { | |
4beb345b | 1666 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
792c95dd BF |
1667 | struct nfsd4_session *ses; |
1668 | ||
0a880a28 TM |
1669 | lockdep_assert_held(&nn->client_lock); |
1670 | ||
4beb345b TM |
1671 | /* Mark the client as expired! */ |
1672 | clp->cl_time = 0; | |
1673 | /* Make it invisible */ | |
1674 | if (!list_empty(&clp->cl_idhash)) { | |
1675 | list_del_init(&clp->cl_idhash); | |
1676 | if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) | |
1677 | rb_erase(&clp->cl_namenode, &nn->conf_name_tree); | |
1678 | else | |
1679 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); | |
1680 | } | |
1681 | list_del_init(&clp->cl_lru); | |
4c649378 | 1682 | spin_lock(&clp->cl_lock); |
792c95dd BF |
1683 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
1684 | list_del_init(&ses->se_hash); | |
4c649378 | 1685 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
1686 | } |
1687 | ||
1da177e4 | 1688 | static void |
4beb345b TM |
1689 | unhash_client(struct nfs4_client *clp) |
1690 | { | |
1691 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
1692 | ||
1693 | spin_lock(&nn->client_lock); | |
1694 | unhash_client_locked(clp); | |
1695 | spin_unlock(&nn->client_lock); | |
1696 | } | |
1697 | ||
97403d95 JL |
1698 | static __be32 mark_client_expired_locked(struct nfs4_client *clp) |
1699 | { | |
1700 | if (atomic_read(&clp->cl_refcount)) | |
1701 | return nfserr_jukebox; | |
1702 | unhash_client_locked(clp); | |
1703 | return nfs_ok; | |
1704 | } | |
1705 | ||
4beb345b TM |
1706 | static void |
1707 | __destroy_client(struct nfs4_client *clp) | |
1da177e4 | 1708 | { |
fe0750e5 | 1709 | struct nfs4_openowner *oo; |
1da177e4 | 1710 | struct nfs4_delegation *dp; |
1da177e4 LT |
1711 | struct list_head reaplist; |
1712 | ||
1da177e4 | 1713 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 1714 | spin_lock(&state_lock); |
ea1da636 N |
1715 | while (!list_empty(&clp->cl_delegations)) { |
1716 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
42690676 JL |
1717 | unhash_delegation_locked(dp); |
1718 | list_add(&dp->dl_recall_lru, &reaplist); | |
1da177e4 | 1719 | } |
cdc97505 | 1720 | spin_unlock(&state_lock); |
1da177e4 LT |
1721 | while (!list_empty(&reaplist)) { |
1722 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
42690676 | 1723 | list_del_init(&dp->dl_recall_lru); |
8287f009 | 1724 | put_clnt_odstate(dp->dl_clnt_odstate); |
afbda402 | 1725 | nfs4_put_deleg_lease(dp->dl_stid.sc_file); |
6011695d | 1726 | nfs4_put_stid(&dp->dl_stid); |
1da177e4 | 1727 | } |
2d4a532d | 1728 | while (!list_empty(&clp->cl_revoked)) { |
c876486b | 1729 | dp = list_entry(clp->cl_revoked.next, struct nfs4_delegation, dl_recall_lru); |
2d4a532d | 1730 | list_del_init(&dp->dl_recall_lru); |
6011695d | 1731 | nfs4_put_stid(&dp->dl_stid); |
956c4fee | 1732 | } |
ea1da636 | 1733 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 | 1734 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
b5971afa | 1735 | nfs4_get_stateowner(&oo->oo_owner); |
fe0750e5 | 1736 | release_openowner(oo); |
1da177e4 | 1737 | } |
9cf514cc | 1738 | nfsd4_return_all_client_layouts(clp); |
6ff8da08 | 1739 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
1740 | if (clp->cl_cb_conn.cb_xprt) |
1741 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
221a6876 | 1742 | free_client(clp); |
1da177e4 LT |
1743 | } |
1744 | ||
4beb345b TM |
1745 | static void |
1746 | destroy_client(struct nfs4_client *clp) | |
1747 | { | |
1748 | unhash_client(clp); | |
1749 | __destroy_client(clp); | |
1750 | } | |
1751 | ||
0d22f68f BF |
1752 | static void expire_client(struct nfs4_client *clp) |
1753 | { | |
4beb345b | 1754 | unhash_client(clp); |
0d22f68f | 1755 | nfsd4_client_record_remove(clp); |
4beb345b | 1756 | __destroy_client(clp); |
0d22f68f BF |
1757 | } |
1758 | ||
35bba9a3 BF |
1759 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
1760 | { | |
1761 | memcpy(target->cl_verifier.data, source->data, | |
1762 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
1763 | } |
1764 | ||
35bba9a3 BF |
1765 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
1766 | { | |
1da177e4 LT |
1767 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
1768 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
1769 | } | |
1770 | ||
03a4e1f6 | 1771 | static int copy_cred(struct svc_cred *target, struct svc_cred *source) |
35bba9a3 | 1772 | { |
03a4e1f6 BF |
1773 | if (source->cr_principal) { |
1774 | target->cr_principal = | |
1775 | kstrdup(source->cr_principal, GFP_KERNEL); | |
1776 | if (target->cr_principal == NULL) | |
1777 | return -ENOMEM; | |
1778 | } else | |
1779 | target->cr_principal = NULL; | |
d5497fc6 | 1780 | target->cr_flavor = source->cr_flavor; |
1da177e4 LT |
1781 | target->cr_uid = source->cr_uid; |
1782 | target->cr_gid = source->cr_gid; | |
1783 | target->cr_group_info = source->cr_group_info; | |
1784 | get_group_info(target->cr_group_info); | |
0dc1531a BF |
1785 | target->cr_gss_mech = source->cr_gss_mech; |
1786 | if (source->cr_gss_mech) | |
1787 | gss_mech_get(source->cr_gss_mech); | |
03a4e1f6 | 1788 | return 0; |
1da177e4 LT |
1789 | } |
1790 | ||
ef17af2a | 1791 | static int |
ac55fdc4 JL |
1792 | compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2) |
1793 | { | |
ef17af2a RV |
1794 | if (o1->len < o2->len) |
1795 | return -1; | |
1796 | if (o1->len > o2->len) | |
1797 | return 1; | |
1798 | return memcmp(o1->data, o2->data, o1->len); | |
ac55fdc4 JL |
1799 | } |
1800 | ||
35bba9a3 | 1801 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 1802 | { |
a55370a3 | 1803 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
1804 | } |
1805 | ||
1806 | static int | |
599e0a22 BF |
1807 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1808 | { | |
1809 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
1810 | } |
1811 | ||
1812 | static int | |
599e0a22 BF |
1813 | same_clid(clientid_t *cl1, clientid_t *cl2) |
1814 | { | |
1815 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1816 | } |
1817 | ||
8fbba96e BF |
1818 | static bool groups_equal(struct group_info *g1, struct group_info *g2) |
1819 | { | |
1820 | int i; | |
1821 | ||
1822 | if (g1->ngroups != g2->ngroups) | |
1823 | return false; | |
1824 | for (i=0; i<g1->ngroups; i++) | |
6fab8779 | 1825 | if (!gid_eq(GROUP_AT(g1, i), GROUP_AT(g2, i))) |
8fbba96e BF |
1826 | return false; |
1827 | return true; | |
1828 | } | |
1829 | ||
68eb3508 BF |
1830 | /* |
1831 | * RFC 3530 language requires clid_inuse be returned when the | |
1832 | * "principal" associated with a requests differs from that previously | |
1833 | * used. We use uid, gid's, and gss principal string as our best | |
1834 | * approximation. We also don't want to allow non-gss use of a client | |
1835 | * established using gss: in theory cr_principal should catch that | |
1836 | * change, but in practice cr_principal can be null even in the gss case | |
1837 | * since gssd doesn't always pass down a principal string. | |
1838 | */ | |
1839 | static bool is_gss_cred(struct svc_cred *cr) | |
1840 | { | |
1841 | /* Is cr_flavor one of the gss "pseudoflavors"?: */ | |
1842 | return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR); | |
1843 | } | |
1844 | ||
1845 | ||
5559b50a | 1846 | static bool |
599e0a22 BF |
1847 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
1848 | { | |
68eb3508 | 1849 | if ((is_gss_cred(cr1) != is_gss_cred(cr2)) |
6fab8779 EB |
1850 | || (!uid_eq(cr1->cr_uid, cr2->cr_uid)) |
1851 | || (!gid_eq(cr1->cr_gid, cr2->cr_gid)) | |
8fbba96e BF |
1852 | || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) |
1853 | return false; | |
1854 | if (cr1->cr_principal == cr2->cr_principal) | |
1855 | return true; | |
1856 | if (!cr1->cr_principal || !cr2->cr_principal) | |
1857 | return false; | |
5559b50a | 1858 | return 0 == strcmp(cr1->cr_principal, cr2->cr_principal); |
1da177e4 LT |
1859 | } |
1860 | ||
57266a6e BF |
1861 | static bool svc_rqst_integrity_protected(struct svc_rqst *rqstp) |
1862 | { | |
1863 | struct svc_cred *cr = &rqstp->rq_cred; | |
1864 | u32 service; | |
1865 | ||
c4720591 BF |
1866 | if (!cr->cr_gss_mech) |
1867 | return false; | |
57266a6e BF |
1868 | service = gss_pseudoflavor_to_service(cr->cr_gss_mech, cr->cr_flavor); |
1869 | return service == RPC_GSS_SVC_INTEGRITY || | |
1870 | service == RPC_GSS_SVC_PRIVACY; | |
1871 | } | |
1872 | ||
1873 | static bool mach_creds_match(struct nfs4_client *cl, struct svc_rqst *rqstp) | |
1874 | { | |
1875 | struct svc_cred *cr = &rqstp->rq_cred; | |
1876 | ||
1877 | if (!cl->cl_mach_cred) | |
1878 | return true; | |
1879 | if (cl->cl_cred.cr_gss_mech != cr->cr_gss_mech) | |
1880 | return false; | |
1881 | if (!svc_rqst_integrity_protected(rqstp)) | |
1882 | return false; | |
1883 | if (!cr->cr_principal) | |
1884 | return false; | |
1885 | return 0 == strcmp(cl->cl_cred.cr_principal, cr->cr_principal); | |
1886 | } | |
1887 | ||
294ac32e | 1888 | static void gen_confirm(struct nfs4_client *clp, struct nfsd_net *nn) |
deda2faa | 1889 | { |
ab4684d1 | 1890 | __be32 verf[2]; |
1da177e4 | 1891 | |
f419992c JL |
1892 | /* |
1893 | * This is opaque to client, so no need to byte-swap. Use | |
1894 | * __force to keep sparse happy | |
1895 | */ | |
1896 | verf[0] = (__force __be32)get_seconds(); | |
294ac32e | 1897 | verf[1] = (__force __be32)nn->clientid_counter; |
ab4684d1 | 1898 | memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); |
1da177e4 LT |
1899 | } |
1900 | ||
294ac32e JL |
1901 | static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn) |
1902 | { | |
1903 | clp->cl_clientid.cl_boot = nn->boot_time; | |
1904 | clp->cl_clientid.cl_id = nn->clientid_counter++; | |
1905 | gen_confirm(clp, nn); | |
1906 | } | |
1907 | ||
4770d722 JL |
1908 | static struct nfs4_stid * |
1909 | find_stateid_locked(struct nfs4_client *cl, stateid_t *t) | |
4581d140 | 1910 | { |
3abdb607 BF |
1911 | struct nfs4_stid *ret; |
1912 | ||
1913 | ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id); | |
1914 | if (!ret || !ret->sc_type) | |
1915 | return NULL; | |
1916 | return ret; | |
4d71ab87 BF |
1917 | } |
1918 | ||
4770d722 JL |
1919 | static struct nfs4_stid * |
1920 | find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) | |
f459e453 BF |
1921 | { |
1922 | struct nfs4_stid *s; | |
4d71ab87 | 1923 | |
4770d722 JL |
1924 | spin_lock(&cl->cl_lock); |
1925 | s = find_stateid_locked(cl, t); | |
2d3f9668 TM |
1926 | if (s != NULL) { |
1927 | if (typemask & s->sc_type) | |
1928 | atomic_inc(&s->sc_count); | |
1929 | else | |
1930 | s = NULL; | |
1931 | } | |
4770d722 JL |
1932 | spin_unlock(&cl->cl_lock); |
1933 | return s; | |
4581d140 BF |
1934 | } |
1935 | ||
2216d449 | 1936 | static struct nfs4_client *create_client(struct xdr_netobj name, |
b09333c4 RL |
1937 | struct svc_rqst *rqstp, nfs4_verifier *verf) |
1938 | { | |
1939 | struct nfs4_client *clp; | |
1940 | struct sockaddr *sa = svc_addr(rqstp); | |
03a4e1f6 | 1941 | int ret; |
c212cecf | 1942 | struct net *net = SVC_NET(rqstp); |
b09333c4 RL |
1943 | |
1944 | clp = alloc_client(name); | |
1945 | if (clp == NULL) | |
1946 | return NULL; | |
1947 | ||
03a4e1f6 BF |
1948 | ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); |
1949 | if (ret) { | |
03a4e1f6 | 1950 | free_client(clp); |
03a4e1f6 | 1951 | return NULL; |
b09333c4 | 1952 | } |
0162ac2b | 1953 | nfsd4_init_cb(&clp->cl_cb_null, clp, NULL, NFSPROC4_CLNT_CB_NULL); |
07cd4909 | 1954 | clp->cl_time = get_seconds(); |
b09333c4 | 1955 | clear_bit(0, &clp->cl_cb_slot_busy); |
b09333c4 RL |
1956 | copy_verf(clp, verf); |
1957 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
edd76786 | 1958 | clp->cl_cb_session = NULL; |
c212cecf | 1959 | clp->net = net; |
b09333c4 RL |
1960 | return clp; |
1961 | } | |
1962 | ||
fd39ca9a | 1963 | static void |
ac55fdc4 JL |
1964 | add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root) |
1965 | { | |
1966 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
1967 | struct nfs4_client *clp; | |
1968 | ||
1969 | while (*new) { | |
1970 | clp = rb_entry(*new, struct nfs4_client, cl_namenode); | |
1971 | parent = *new; | |
1972 | ||
1973 | if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0) | |
1974 | new = &((*new)->rb_left); | |
1975 | else | |
1976 | new = &((*new)->rb_right); | |
1977 | } | |
1978 | ||
1979 | rb_link_node(&new_clp->cl_namenode, parent, new); | |
1980 | rb_insert_color(&new_clp->cl_namenode, root); | |
1981 | } | |
1982 | ||
1983 | static struct nfs4_client * | |
1984 | find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root) | |
1985 | { | |
ef17af2a | 1986 | int cmp; |
ac55fdc4 JL |
1987 | struct rb_node *node = root->rb_node; |
1988 | struct nfs4_client *clp; | |
1989 | ||
1990 | while (node) { | |
1991 | clp = rb_entry(node, struct nfs4_client, cl_namenode); | |
1992 | cmp = compare_blob(&clp->cl_name, name); | |
1993 | if (cmp > 0) | |
1994 | node = node->rb_left; | |
1995 | else if (cmp < 0) | |
1996 | node = node->rb_right; | |
1997 | else | |
1998 | return clp; | |
1999 | } | |
2000 | return NULL; | |
2001 | } | |
2002 | ||
2003 | static void | |
2004 | add_to_unconfirmed(struct nfs4_client *clp) | |
1da177e4 LT |
2005 | { |
2006 | unsigned int idhashval; | |
0a7ec377 | 2007 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 2008 | |
0a880a28 TM |
2009 | lockdep_assert_held(&nn->client_lock); |
2010 | ||
ac55fdc4 | 2011 | clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
a99454aa | 2012 | add_clp_to_name_tree(clp, &nn->unconf_name_tree); |
1da177e4 | 2013 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
0a7ec377 | 2014 | list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]); |
3dbacee6 | 2015 | renew_client_locked(clp); |
1da177e4 LT |
2016 | } |
2017 | ||
fd39ca9a | 2018 | static void |
1da177e4 LT |
2019 | move_to_confirmed(struct nfs4_client *clp) |
2020 | { | |
2021 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
8daae4dc | 2022 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 2023 | |
0a880a28 TM |
2024 | lockdep_assert_held(&nn->client_lock); |
2025 | ||
1da177e4 | 2026 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); |
8daae4dc | 2027 | list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]); |
a99454aa | 2028 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
382a62e7 | 2029 | add_clp_to_name_tree(clp, &nn->conf_name_tree); |
ac55fdc4 | 2030 | set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
3dbacee6 | 2031 | renew_client_locked(clp); |
1da177e4 LT |
2032 | } |
2033 | ||
2034 | static struct nfs4_client * | |
bfa85e83 | 2035 | find_client_in_id_table(struct list_head *tbl, clientid_t *clid, bool sessions) |
1da177e4 LT |
2036 | { |
2037 | struct nfs4_client *clp; | |
2038 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
2039 | ||
bfa85e83 | 2040 | list_for_each_entry(clp, &tbl[idhashval], cl_idhash) { |
a50d2ad1 | 2041 | if (same_clid(&clp->cl_clientid, clid)) { |
d15c077e BF |
2042 | if ((bool)clp->cl_minorversion != sessions) |
2043 | return NULL; | |
3dbacee6 | 2044 | renew_client_locked(clp); |
1da177e4 | 2045 | return clp; |
a50d2ad1 | 2046 | } |
1da177e4 LT |
2047 | } |
2048 | return NULL; | |
2049 | } | |
2050 | ||
bfa85e83 BF |
2051 | static struct nfs4_client * |
2052 | find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) | |
2053 | { | |
2054 | struct list_head *tbl = nn->conf_id_hashtbl; | |
2055 | ||
0a880a28 | 2056 | lockdep_assert_held(&nn->client_lock); |
bfa85e83 BF |
2057 | return find_client_in_id_table(tbl, clid, sessions); |
2058 | } | |
2059 | ||
1da177e4 | 2060 | static struct nfs4_client * |
0a7ec377 | 2061 | find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
1da177e4 | 2062 | { |
bfa85e83 | 2063 | struct list_head *tbl = nn->unconf_id_hashtbl; |
1da177e4 | 2064 | |
0a880a28 | 2065 | lockdep_assert_held(&nn->client_lock); |
bfa85e83 | 2066 | return find_client_in_id_table(tbl, clid, sessions); |
1da177e4 LT |
2067 | } |
2068 | ||
6e5f15c9 | 2069 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 2070 | { |
6e5f15c9 | 2071 | return clp->cl_exchange_flags != 0; |
e203d506 | 2072 | } |
a1bcecd2 | 2073 | |
28ce6054 | 2074 | static struct nfs4_client * |
382a62e7 | 2075 | find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 2076 | { |
0a880a28 | 2077 | lockdep_assert_held(&nn->client_lock); |
382a62e7 | 2078 | return find_clp_in_name_tree(name, &nn->conf_name_tree); |
28ce6054 N |
2079 | } |
2080 | ||
2081 | static struct nfs4_client * | |
a99454aa | 2082 | find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 2083 | { |
0a880a28 | 2084 | lockdep_assert_held(&nn->client_lock); |
a99454aa | 2085 | return find_clp_in_name_tree(name, &nn->unconf_name_tree); |
28ce6054 N |
2086 | } |
2087 | ||
fd39ca9a | 2088 | static void |
6f3d772f | 2089 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 2090 | { |
07263f1e | 2091 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
2092 | struct sockaddr *sa = svc_addr(rqstp); |
2093 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
2094 | unsigned short expected_family; |
2095 | ||
2096 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
2097 | if (se->se_callback_netid_len == 3 && | |
2098 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
2099 | expected_family = AF_INET; | |
2100 | else if (se->se_callback_netid_len == 4 && | |
2101 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
2102 | expected_family = AF_INET6; | |
2103 | else | |
1da177e4 LT |
2104 | goto out_err; |
2105 | ||
c212cecf | 2106 | conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val, |
aa9a4ec7 | 2107 | se->se_callback_addr_len, |
07263f1e BF |
2108 | (struct sockaddr *)&conn->cb_addr, |
2109 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 2110 | |
07263f1e | 2111 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 2112 | goto out_err; |
aa9a4ec7 | 2113 | |
07263f1e BF |
2114 | if (conn->cb_addr.ss_family == AF_INET6) |
2115 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 2116 | |
07263f1e BF |
2117 | conn->cb_prog = se->se_callback_prog; |
2118 | conn->cb_ident = se->se_callback_ident; | |
849a1cf1 | 2119 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
1da177e4 LT |
2120 | return; |
2121 | out_err: | |
07263f1e BF |
2122 | conn->cb_addr.ss_family = AF_UNSPEC; |
2123 | conn->cb_addrlen = 0; | |
849823c5 | 2124 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
2125 | "will not receive delegations\n", |
2126 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
2127 | ||
1da177e4 LT |
2128 | return; |
2129 | } | |
2130 | ||
074fe897 | 2131 | /* |
067e1ace | 2132 | * Cache a reply. nfsd4_check_resp_size() has bounded the cache size. |
074fe897 | 2133 | */ |
b607664e | 2134 | static void |
074fe897 | 2135 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) |
074fe897 | 2136 | { |
f5236013 | 2137 | struct xdr_buf *buf = resp->xdr.buf; |
557ce264 AA |
2138 | struct nfsd4_slot *slot = resp->cstate.slot; |
2139 | unsigned int base; | |
074fe897 | 2140 | |
557ce264 | 2141 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 2142 | |
557ce264 AA |
2143 | slot->sl_opcnt = resp->opcnt; |
2144 | slot->sl_status = resp->cstate.status; | |
074fe897 | 2145 | |
bf5c43c8 | 2146 | slot->sl_flags |= NFSD4_SLOT_INITIALIZED; |
bf864a31 | 2147 | if (nfsd4_not_cached(resp)) { |
557ce264 | 2148 | slot->sl_datalen = 0; |
bf864a31 | 2149 | return; |
074fe897 | 2150 | } |
f5236013 BF |
2151 | base = resp->cstate.data_offset; |
2152 | slot->sl_datalen = buf->len - base; | |
2153 | if (read_bytes_from_xdr_buf(buf, base, slot->sl_data, slot->sl_datalen)) | |
557ce264 AA |
2154 | WARN("%s: sessions DRC could not cache compound\n", __func__); |
2155 | return; | |
074fe897 AA |
2156 | } |
2157 | ||
2158 | /* | |
abfabf8c AA |
2159 | * Encode the replay sequence operation from the slot values. |
2160 | * If cachethis is FALSE encode the uncached rep error on the next | |
2161 | * operation which sets resp->p and increments resp->opcnt for | |
2162 | * nfs4svc_encode_compoundres. | |
074fe897 | 2163 | * |
074fe897 | 2164 | */ |
abfabf8c AA |
2165 | static __be32 |
2166 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
2167 | struct nfsd4_compoundres *resp) | |
074fe897 | 2168 | { |
abfabf8c AA |
2169 | struct nfsd4_op *op; |
2170 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 2171 | |
abfabf8c AA |
2172 | /* Encode the replayed sequence operation */ |
2173 | op = &args->ops[resp->opcnt - 1]; | |
2174 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 2175 | |
abfabf8c | 2176 | /* Return nfserr_retry_uncached_rep in next operation. */ |
73e79482 | 2177 | if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) { |
abfabf8c AA |
2178 | op = &args->ops[resp->opcnt++]; |
2179 | op->status = nfserr_retry_uncached_rep; | |
2180 | nfsd4_encode_operation(resp, op); | |
074fe897 | 2181 | } |
abfabf8c | 2182 | return op->status; |
074fe897 AA |
2183 | } |
2184 | ||
2185 | /* | |
557ce264 AA |
2186 | * The sequence operation is not cached because we can use the slot and |
2187 | * session values. | |
074fe897 | 2188 | */ |
3ca2eb98 | 2189 | static __be32 |
bf864a31 AA |
2190 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
2191 | struct nfsd4_sequence *seq) | |
074fe897 | 2192 | { |
557ce264 | 2193 | struct nfsd4_slot *slot = resp->cstate.slot; |
f5236013 BF |
2194 | struct xdr_stream *xdr = &resp->xdr; |
2195 | __be32 *p; | |
074fe897 AA |
2196 | __be32 status; |
2197 | ||
557ce264 | 2198 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 2199 | |
abfabf8c | 2200 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); |
0da7b19c | 2201 | if (status) |
abfabf8c | 2202 | return status; |
074fe897 | 2203 | |
f5236013 BF |
2204 | p = xdr_reserve_space(xdr, slot->sl_datalen); |
2205 | if (!p) { | |
2206 | WARN_ON_ONCE(1); | |
2207 | return nfserr_serverfault; | |
2208 | } | |
2209 | xdr_encode_opaque_fixed(p, slot->sl_data, slot->sl_datalen); | |
2210 | xdr_commit_encode(xdr); | |
074fe897 | 2211 | |
557ce264 | 2212 | resp->opcnt = slot->sl_opcnt; |
f5236013 | 2213 | return slot->sl_status; |
074fe897 AA |
2214 | } |
2215 | ||
0733d213 AA |
2216 | /* |
2217 | * Set the exchange_id flags returned by the server. | |
2218 | */ | |
2219 | static void | |
2220 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
2221 | { | |
9cf514cc CH |
2222 | #ifdef CONFIG_NFSD_PNFS |
2223 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_PNFS_MDS; | |
2224 | #else | |
0733d213 | 2225 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; |
9cf514cc | 2226 | #endif |
0733d213 AA |
2227 | |
2228 | /* Referrals are supported, Migration is not. */ | |
2229 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
2230 | ||
2231 | /* set the wire flags to return to client. */ | |
2232 | clid->flags = new->cl_exchange_flags; | |
2233 | } | |
2234 | ||
631fc9ea BF |
2235 | static bool client_has_state(struct nfs4_client *clp) |
2236 | { | |
2237 | /* | |
2238 | * Note clp->cl_openowners check isn't quite right: there's no | |
2239 | * need to count owners without stateid's. | |
2240 | * | |
2241 | * Also note we should probably be using this in 4.0 case too. | |
2242 | */ | |
6eccece9 BF |
2243 | return !list_empty(&clp->cl_openowners) |
2244 | || !list_empty(&clp->cl_delegations) | |
2245 | || !list_empty(&clp->cl_sessions); | |
631fc9ea BF |
2246 | } |
2247 | ||
069b6ad4 AA |
2248 | __be32 |
2249 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
2250 | struct nfsd4_compound_state *cstate, | |
2251 | struct nfsd4_exchange_id *exid) | |
2252 | { | |
3dbacee6 TM |
2253 | struct nfs4_client *conf, *new; |
2254 | struct nfs4_client *unconf = NULL; | |
57b7b43b | 2255 | __be32 status; |
363168b4 | 2256 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 2257 | nfs4_verifier verf = exid->verifier; |
363168b4 | 2258 | struct sockaddr *sa = svc_addr(rqstp); |
83e08fd4 | 2259 | bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; |
c212cecf | 2260 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
0733d213 | 2261 | |
363168b4 | 2262 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 2263 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 2264 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 2265 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 2266 | addr_str, exid->flags, exid->spa_how); |
0733d213 | 2267 | |
a084daf5 | 2268 | if (exid->flags & ~EXCHGID4_FLAG_MASK_A) |
0733d213 AA |
2269 | return nfserr_inval; |
2270 | ||
0733d213 | 2271 | switch (exid->spa_how) { |
57266a6e BF |
2272 | case SP4_MACH_CRED: |
2273 | if (!svc_rqst_integrity_protected(rqstp)) | |
2274 | return nfserr_inval; | |
0733d213 AA |
2275 | case SP4_NONE: |
2276 | break; | |
063b0fb9 BF |
2277 | default: /* checked by xdr code */ |
2278 | WARN_ON_ONCE(1); | |
0733d213 | 2279 | case SP4_SSV: |
dd30333c | 2280 | return nfserr_encr_alg_unsupp; |
0733d213 AA |
2281 | } |
2282 | ||
5cc40fd7 TM |
2283 | new = create_client(exid->clname, rqstp, &verf); |
2284 | if (new == NULL) | |
2285 | return nfserr_jukebox; | |
2286 | ||
2dbb269d | 2287 | /* Cases below refer to rfc 5661 section 18.35.4: */ |
3dbacee6 | 2288 | spin_lock(&nn->client_lock); |
382a62e7 | 2289 | conf = find_confirmed_client_by_name(&exid->clname, nn); |
0733d213 | 2290 | if (conf) { |
83e08fd4 BF |
2291 | bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); |
2292 | bool verfs_match = same_verf(&verf, &conf->cl_verifier); | |
2293 | ||
136e658d BF |
2294 | if (update) { |
2295 | if (!clp_used_exchangeid(conf)) { /* buggy client */ | |
2dbb269d | 2296 | status = nfserr_inval; |
1a308118 BF |
2297 | goto out; |
2298 | } | |
57266a6e BF |
2299 | if (!mach_creds_match(conf, rqstp)) { |
2300 | status = nfserr_wrong_cred; | |
2301 | goto out; | |
2302 | } | |
136e658d | 2303 | if (!creds_match) { /* case 9 */ |
ea236d07 | 2304 | status = nfserr_perm; |
136e658d BF |
2305 | goto out; |
2306 | } | |
2307 | if (!verfs_match) { /* case 8 */ | |
0733d213 AA |
2308 | status = nfserr_not_same; |
2309 | goto out; | |
2310 | } | |
136e658d BF |
2311 | /* case 6 */ |
2312 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
136e658d | 2313 | goto out_copy; |
0733d213 | 2314 | } |
136e658d | 2315 | if (!creds_match) { /* case 3 */ |
631fc9ea BF |
2316 | if (client_has_state(conf)) { |
2317 | status = nfserr_clid_inuse; | |
0733d213 AA |
2318 | goto out; |
2319 | } | |
0733d213 AA |
2320 | goto out_new; |
2321 | } | |
136e658d | 2322 | if (verfs_match) { /* case 2 */ |
0f1ba0ef | 2323 | conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; |
136e658d BF |
2324 | goto out_copy; |
2325 | } | |
2326 | /* case 5, client reboot */ | |
3dbacee6 | 2327 | conf = NULL; |
136e658d | 2328 | goto out_new; |
6ddbbbfe MS |
2329 | } |
2330 | ||
2dbb269d | 2331 | if (update) { /* case 7 */ |
6ddbbbfe MS |
2332 | status = nfserr_noent; |
2333 | goto out; | |
0733d213 AA |
2334 | } |
2335 | ||
a99454aa | 2336 | unconf = find_unconfirmed_client_by_name(&exid->clname, nn); |
2dbb269d | 2337 | if (unconf) /* case 4, possible retry or client restart */ |
3dbacee6 | 2338 | unhash_client_locked(unconf); |
0733d213 | 2339 | |
2dbb269d | 2340 | /* case 1 (normal case) */ |
0733d213 | 2341 | out_new: |
fd699b8a JL |
2342 | if (conf) { |
2343 | status = mark_client_expired_locked(conf); | |
2344 | if (status) | |
2345 | goto out; | |
2346 | } | |
4f540e29 | 2347 | new->cl_minorversion = cstate->minorversion; |
57266a6e | 2348 | new->cl_mach_cred = (exid->spa_how == SP4_MACH_CRED); |
0733d213 | 2349 | |
c212cecf | 2350 | gen_clid(new, nn); |
ac55fdc4 | 2351 | add_to_unconfirmed(new); |
3dbacee6 | 2352 | swap(new, conf); |
0733d213 | 2353 | out_copy: |
5cc40fd7 TM |
2354 | exid->clientid.cl_boot = conf->cl_clientid.cl_boot; |
2355 | exid->clientid.cl_id = conf->cl_clientid.cl_id; | |
0733d213 | 2356 | |
5cc40fd7 TM |
2357 | exid->seqid = conf->cl_cs_slot.sl_seqid + 1; |
2358 | nfsd4_set_ex_flags(conf, exid); | |
0733d213 AA |
2359 | |
2360 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
5cc40fd7 | 2361 | conf->cl_cs_slot.sl_seqid, conf->cl_exchange_flags); |
0733d213 AA |
2362 | status = nfs_ok; |
2363 | ||
2364 | out: | |
3dbacee6 | 2365 | spin_unlock(&nn->client_lock); |
5cc40fd7 | 2366 | if (new) |
3dbacee6 TM |
2367 | expire_client(new); |
2368 | if (unconf) | |
2369 | expire_client(unconf); | |
0733d213 | 2370 | return status; |
069b6ad4 AA |
2371 | } |
2372 | ||
57b7b43b | 2373 | static __be32 |
88e588d5 | 2374 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 2375 | { |
88e588d5 AA |
2376 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
2377 | slot_seqid); | |
b85d4c01 BH |
2378 | |
2379 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
2380 | if (slot_inuse) { |
2381 | if (seqid == slot_seqid) | |
b85d4c01 BH |
2382 | return nfserr_jukebox; |
2383 | else | |
2384 | return nfserr_seq_misordered; | |
2385 | } | |
f6d82485 | 2386 | /* Note unsigned 32-bit arithmetic handles wraparound: */ |
88e588d5 | 2387 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 | 2388 | return nfs_ok; |
88e588d5 | 2389 | if (seqid == slot_seqid) |
b85d4c01 | 2390 | return nfserr_replay_cache; |
b85d4c01 BH |
2391 | return nfserr_seq_misordered; |
2392 | } | |
2393 | ||
49557cc7 AA |
2394 | /* |
2395 | * Cache the create session result into the create session single DRC | |
2396 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
2397 | * Do this for solo or embedded create session operations. | |
2398 | */ | |
2399 | static void | |
2400 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
57b7b43b | 2401 | struct nfsd4_clid_slot *slot, __be32 nfserr) |
49557cc7 AA |
2402 | { |
2403 | slot->sl_status = nfserr; | |
2404 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
2405 | } | |
2406 | ||
2407 | static __be32 | |
2408 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
2409 | struct nfsd4_clid_slot *slot) | |
2410 | { | |
2411 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
2412 | return slot->sl_status; | |
2413 | } | |
2414 | ||
1b74c25b MJ |
2415 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
2416 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
2417 | 1 + /* MIN tag is length with zero, only length */ \ | |
2418 | 3 + /* version, opcount, opcode */ \ | |
2419 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
2420 | /* seqid, slotID, slotID, cache */ \ | |
2421 | 4 ) * sizeof(__be32)) | |
2422 | ||
2423 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
2424 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
2425 | 1 + /* status */ \ | |
2426 | 1 + /* MIN tag is length with zero, only length */ \ | |
2427 | 3 + /* opcount, opcode, opstatus*/ \ | |
2428 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
2429 | /* seqid, slotID, slotID, slotID, status */ \ | |
2430 | 5 ) * sizeof(__be32)) | |
2431 | ||
55c760cf | 2432 | static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs *ca, struct nfsd_net *nn) |
1b74c25b | 2433 | { |
55c760cf BF |
2434 | u32 maxrpc = nn->nfsd_serv->sv_max_mesg; |
2435 | ||
373cd409 BF |
2436 | if (ca->maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ) |
2437 | return nfserr_toosmall; | |
2438 | if (ca->maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ) | |
2439 | return nfserr_toosmall; | |
55c760cf BF |
2440 | ca->headerpadsz = 0; |
2441 | ca->maxreq_sz = min_t(u32, ca->maxreq_sz, maxrpc); | |
2442 | ca->maxresp_sz = min_t(u32, ca->maxresp_sz, maxrpc); | |
2443 | ca->maxops = min_t(u32, ca->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
2444 | ca->maxresp_cached = min_t(u32, ca->maxresp_cached, | |
2445 | NFSD_SLOT_CACHE_SIZE + NFSD_MIN_HDR_SEQ_SZ); | |
2446 | ca->maxreqs = min_t(u32, ca->maxreqs, NFSD_MAX_SLOTS_PER_SESSION); | |
2447 | /* | |
2448 | * Note decreasing slot size below client's request may make it | |
2449 | * difficult for client to function correctly, whereas | |
2450 | * decreasing the number of slots will (just?) affect | |
2451 | * performance. When short on memory we therefore prefer to | |
2452 | * decrease number of slots instead of their size. Clients that | |
2453 | * request larger slots than they need will get poor results: | |
2454 | */ | |
2455 | ca->maxreqs = nfsd4_get_drc_mem(ca); | |
2456 | if (!ca->maxreqs) | |
2457 | return nfserr_jukebox; | |
2458 | ||
373cd409 | 2459 | return nfs_ok; |
1b74c25b MJ |
2460 | } |
2461 | ||
8a891633 KM |
2462 | #define NFSD_CB_MAX_REQ_SZ ((NFS4_enc_cb_recall_sz + \ |
2463 | RPC_MAX_HEADER_WITH_AUTH) * sizeof(__be32)) | |
2464 | #define NFSD_CB_MAX_RESP_SZ ((NFS4_dec_cb_recall_sz + \ | |
2465 | RPC_MAX_REPHEADER_WITH_AUTH) * sizeof(__be32)) | |
2466 | ||
06b332a5 | 2467 | static __be32 check_backchannel_attrs(struct nfsd4_channel_attrs *ca) |
1b74c25b | 2468 | { |
06b332a5 BF |
2469 | ca->headerpadsz = 0; |
2470 | ||
2471 | /* | |
2472 | * These RPC_MAX_HEADER macros are overkill, especially since we | |
2473 | * don't even do gss on the backchannel yet. But this is still | |
2474 | * less than 1k. Tighten up this estimate in the unlikely event | |
2475 | * it turns out to be a problem for some client: | |
2476 | */ | |
8a891633 | 2477 | if (ca->maxreq_sz < NFSD_CB_MAX_REQ_SZ) |
06b332a5 | 2478 | return nfserr_toosmall; |
8a891633 | 2479 | if (ca->maxresp_sz < NFSD_CB_MAX_RESP_SZ) |
06b332a5 BF |
2480 | return nfserr_toosmall; |
2481 | ca->maxresp_cached = 0; | |
2482 | if (ca->maxops < 2) | |
2483 | return nfserr_toosmall; | |
2484 | ||
2485 | return nfs_ok; | |
1b74c25b MJ |
2486 | } |
2487 | ||
b78724b7 BF |
2488 | static __be32 nfsd4_check_cb_sec(struct nfsd4_cb_sec *cbs) |
2489 | { | |
2490 | switch (cbs->flavor) { | |
2491 | case RPC_AUTH_NULL: | |
2492 | case RPC_AUTH_UNIX: | |
2493 | return nfs_ok; | |
2494 | default: | |
2495 | /* | |
2496 | * GSS case: the spec doesn't allow us to return this | |
2497 | * error. But it also doesn't allow us not to support | |
2498 | * GSS. | |
2499 | * I'd rather this fail hard than return some error the | |
2500 | * client might think it can already handle: | |
2501 | */ | |
2502 | return nfserr_encr_alg_unsupp; | |
2503 | } | |
2504 | } | |
2505 | ||
069b6ad4 AA |
2506 | __be32 |
2507 | nfsd4_create_session(struct svc_rqst *rqstp, | |
2508 | struct nfsd4_compound_state *cstate, | |
2509 | struct nfsd4_create_session *cr_ses) | |
2510 | { | |
363168b4 | 2511 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 2512 | struct nfs4_client *conf, *unconf; |
d20c11d8 | 2513 | struct nfs4_client *old = NULL; |
ac7c46f2 | 2514 | struct nfsd4_session *new; |
81f0b2a4 | 2515 | struct nfsd4_conn *conn; |
49557cc7 | 2516 | struct nfsd4_clid_slot *cs_slot = NULL; |
57b7b43b | 2517 | __be32 status = 0; |
8daae4dc | 2518 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
ec6b5d7b | 2519 | |
a62573dc MJ |
2520 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
2521 | return nfserr_inval; | |
b78724b7 BF |
2522 | status = nfsd4_check_cb_sec(&cr_ses->cb_sec); |
2523 | if (status) | |
2524 | return status; | |
55c760cf | 2525 | status = check_forechannel_attrs(&cr_ses->fore_channel, nn); |
06b332a5 BF |
2526 | if (status) |
2527 | return status; | |
2528 | status = check_backchannel_attrs(&cr_ses->back_channel); | |
373cd409 | 2529 | if (status) |
f403e450 | 2530 | goto out_release_drc_mem; |
81f0b2a4 | 2531 | status = nfserr_jukebox; |
60810e54 | 2532 | new = alloc_session(&cr_ses->fore_channel, &cr_ses->back_channel); |
55c760cf BF |
2533 | if (!new) |
2534 | goto out_release_drc_mem; | |
81f0b2a4 BF |
2535 | conn = alloc_conn_from_crses(rqstp, cr_ses); |
2536 | if (!conn) | |
2537 | goto out_free_session; | |
a62573dc | 2538 | |
d20c11d8 | 2539 | spin_lock(&nn->client_lock); |
0a7ec377 | 2540 | unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn); |
8daae4dc | 2541 | conf = find_confirmed_client(&cr_ses->clientid, true, nn); |
78389046 | 2542 | WARN_ON_ONCE(conf && unconf); |
ec6b5d7b AA |
2543 | |
2544 | if (conf) { | |
57266a6e BF |
2545 | status = nfserr_wrong_cred; |
2546 | if (!mach_creds_match(conf, rqstp)) | |
2547 | goto out_free_conn; | |
49557cc7 AA |
2548 | cs_slot = &conf->cl_cs_slot; |
2549 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 2550 | if (status == nfserr_replay_cache) { |
49557cc7 | 2551 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
81f0b2a4 | 2552 | goto out_free_conn; |
49557cc7 | 2553 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b | 2554 | status = nfserr_seq_misordered; |
81f0b2a4 | 2555 | goto out_free_conn; |
ec6b5d7b | 2556 | } |
ec6b5d7b AA |
2557 | } else if (unconf) { |
2558 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || | |
363168b4 | 2559 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b | 2560 | status = nfserr_clid_inuse; |
81f0b2a4 | 2561 | goto out_free_conn; |
ec6b5d7b | 2562 | } |
57266a6e BF |
2563 | status = nfserr_wrong_cred; |
2564 | if (!mach_creds_match(unconf, rqstp)) | |
2565 | goto out_free_conn; | |
49557cc7 AA |
2566 | cs_slot = &unconf->cl_cs_slot; |
2567 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
2568 | if (status) { |
2569 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 2570 | status = nfserr_seq_misordered; |
81f0b2a4 | 2571 | goto out_free_conn; |
ec6b5d7b | 2572 | } |
382a62e7 | 2573 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
221a6876 | 2574 | if (old) { |
d20c11d8 | 2575 | status = mark_client_expired_locked(old); |
7abea1e8 JL |
2576 | if (status) { |
2577 | old = NULL; | |
221a6876 | 2578 | goto out_free_conn; |
7abea1e8 | 2579 | } |
221a6876 | 2580 | } |
8f9d3d3b | 2581 | move_to_confirmed(unconf); |
ec6b5d7b AA |
2582 | conf = unconf; |
2583 | } else { | |
2584 | status = nfserr_stale_clientid; | |
81f0b2a4 | 2585 | goto out_free_conn; |
ec6b5d7b | 2586 | } |
81f0b2a4 | 2587 | status = nfs_ok; |
408b79bc BF |
2588 | /* |
2589 | * We do not support RDMA or persistent sessions | |
2590 | */ | |
2591 | cr_ses->flags &= ~SESSION4_PERSIST; | |
2592 | cr_ses->flags &= ~SESSION4_RDMA; | |
2593 | ||
81f0b2a4 | 2594 | init_session(rqstp, new, conf, cr_ses); |
d20c11d8 | 2595 | nfsd4_get_session_locked(new); |
81f0b2a4 | 2596 | |
ac7c46f2 | 2597 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, |
ec6b5d7b | 2598 | NFS4_MAX_SESSIONID_LEN); |
86c3e16c | 2599 | cs_slot->sl_seqid++; |
49557cc7 | 2600 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 2601 | |
d20c11d8 | 2602 | /* cache solo and embedded create sessions under the client_lock */ |
49557cc7 | 2603 | nfsd4_cache_create_session(cr_ses, cs_slot, status); |
d20c11d8 JL |
2604 | spin_unlock(&nn->client_lock); |
2605 | /* init connection and backchannel */ | |
2606 | nfsd4_init_conn(rqstp, conn, new); | |
2607 | nfsd4_put_session(new); | |
d20c11d8 JL |
2608 | if (old) |
2609 | expire_client(old); | |
ec6b5d7b | 2610 | return status; |
81f0b2a4 | 2611 | out_free_conn: |
d20c11d8 | 2612 | spin_unlock(&nn->client_lock); |
81f0b2a4 | 2613 | free_conn(conn); |
d20c11d8 JL |
2614 | if (old) |
2615 | expire_client(old); | |
81f0b2a4 BF |
2616 | out_free_session: |
2617 | __free_session(new); | |
55c760cf BF |
2618 | out_release_drc_mem: |
2619 | nfsd4_put_drc_mem(&cr_ses->fore_channel); | |
1ca50792 | 2620 | return status; |
069b6ad4 AA |
2621 | } |
2622 | ||
1d1bc8f2 BF |
2623 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
2624 | { | |
2625 | switch (*dir) { | |
2626 | case NFS4_CDFC4_FORE: | |
2627 | case NFS4_CDFC4_BACK: | |
2628 | return nfs_ok; | |
2629 | case NFS4_CDFC4_FORE_OR_BOTH: | |
2630 | case NFS4_CDFC4_BACK_OR_BOTH: | |
2631 | *dir = NFS4_CDFC4_BOTH; | |
2632 | return nfs_ok; | |
2633 | }; | |
2634 | return nfserr_inval; | |
2635 | } | |
2636 | ||
cb73a9f4 BF |
2637 | __be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_backchannel_ctl *bc) |
2638 | { | |
2639 | struct nfsd4_session *session = cstate->session; | |
c9a49628 | 2640 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
b78724b7 | 2641 | __be32 status; |
cb73a9f4 | 2642 | |
b78724b7 BF |
2643 | status = nfsd4_check_cb_sec(&bc->bc_cb_sec); |
2644 | if (status) | |
2645 | return status; | |
c9a49628 | 2646 | spin_lock(&nn->client_lock); |
cb73a9f4 BF |
2647 | session->se_cb_prog = bc->bc_cb_program; |
2648 | session->se_cb_sec = bc->bc_cb_sec; | |
c9a49628 | 2649 | spin_unlock(&nn->client_lock); |
cb73a9f4 BF |
2650 | |
2651 | nfsd4_probe_callback(session->se_client); | |
2652 | ||
2653 | return nfs_ok; | |
2654 | } | |
2655 | ||
1d1bc8f2 BF |
2656 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, |
2657 | struct nfsd4_compound_state *cstate, | |
2658 | struct nfsd4_bind_conn_to_session *bcts) | |
2659 | { | |
2660 | __be32 status; | |
3ba63671 | 2661 | struct nfsd4_conn *conn; |
4f6e6c17 | 2662 | struct nfsd4_session *session; |
d4e19e70 TM |
2663 | struct net *net = SVC_NET(rqstp); |
2664 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1d1bc8f2 BF |
2665 | |
2666 | if (!nfsd4_last_compound_op(rqstp)) | |
2667 | return nfserr_not_only_op; | |
c9a49628 | 2668 | spin_lock(&nn->client_lock); |
d4e19e70 | 2669 | session = find_in_sessionid_hashtbl(&bcts->sessionid, net, &status); |
c9a49628 | 2670 | spin_unlock(&nn->client_lock); |
4f6e6c17 | 2671 | if (!session) |
d4e19e70 | 2672 | goto out_no_session; |
57266a6e BF |
2673 | status = nfserr_wrong_cred; |
2674 | if (!mach_creds_match(session->se_client, rqstp)) | |
2675 | goto out; | |
1d1bc8f2 | 2676 | status = nfsd4_map_bcts_dir(&bcts->dir); |
3ba63671 | 2677 | if (status) |
4f6e6c17 | 2678 | goto out; |
3ba63671 | 2679 | conn = alloc_conn(rqstp, bcts->dir); |
4f6e6c17 | 2680 | status = nfserr_jukebox; |
3ba63671 | 2681 | if (!conn) |
4f6e6c17 BF |
2682 | goto out; |
2683 | nfsd4_init_conn(rqstp, conn, session); | |
2684 | status = nfs_ok; | |
2685 | out: | |
d4e19e70 TM |
2686 | nfsd4_put_session(session); |
2687 | out_no_session: | |
4f6e6c17 | 2688 | return status; |
1d1bc8f2 BF |
2689 | } |
2690 | ||
5d4cec2f BF |
2691 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
2692 | { | |
2693 | if (!session) | |
2694 | return 0; | |
2695 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
2696 | } | |
2697 | ||
069b6ad4 AA |
2698 | __be32 |
2699 | nfsd4_destroy_session(struct svc_rqst *r, | |
2700 | struct nfsd4_compound_state *cstate, | |
2701 | struct nfsd4_destroy_session *sessionid) | |
2702 | { | |
e10e0cfc | 2703 | struct nfsd4_session *ses; |
abcdff09 | 2704 | __be32 status; |
f0f51f5c | 2705 | int ref_held_by_me = 0; |
d4e19e70 TM |
2706 | struct net *net = SVC_NET(r); |
2707 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
e10e0cfc | 2708 | |
abcdff09 | 2709 | status = nfserr_not_only_op; |
5d4cec2f | 2710 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 | 2711 | if (!nfsd4_last_compound_op(r)) |
abcdff09 | 2712 | goto out; |
f0f51f5c | 2713 | ref_held_by_me++; |
57716355 | 2714 | } |
e10e0cfc | 2715 | dump_sessionid(__func__, &sessionid->sessionid); |
c9a49628 | 2716 | spin_lock(&nn->client_lock); |
d4e19e70 | 2717 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid, net, &status); |
abcdff09 BF |
2718 | if (!ses) |
2719 | goto out_client_lock; | |
57266a6e BF |
2720 | status = nfserr_wrong_cred; |
2721 | if (!mach_creds_match(ses->se_client, r)) | |
d4e19e70 | 2722 | goto out_put_session; |
f0f51f5c | 2723 | status = mark_session_dead_locked(ses, 1 + ref_held_by_me); |
66b2b9b2 | 2724 | if (status) |
f0f51f5c | 2725 | goto out_put_session; |
e10e0cfc | 2726 | unhash_session(ses); |
c9a49628 | 2727 | spin_unlock(&nn->client_lock); |
e10e0cfc | 2728 | |
84f5f7cc | 2729 | nfsd4_probe_callback_sync(ses->se_client); |
19cf5c02 | 2730 | |
c9a49628 | 2731 | spin_lock(&nn->client_lock); |
e10e0cfc | 2732 | status = nfs_ok; |
f0f51f5c | 2733 | out_put_session: |
d4e19e70 | 2734 | nfsd4_put_session_locked(ses); |
abcdff09 BF |
2735 | out_client_lock: |
2736 | spin_unlock(&nn->client_lock); | |
e10e0cfc | 2737 | out: |
e10e0cfc | 2738 | return status; |
069b6ad4 AA |
2739 | } |
2740 | ||
a663bdd8 | 2741 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
2742 | { |
2743 | struct nfsd4_conn *c; | |
2744 | ||
2745 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 2746 | if (c->cn_xprt == xpt) { |
328ead28 BF |
2747 | return c; |
2748 | } | |
2749 | } | |
2750 | return NULL; | |
2751 | } | |
2752 | ||
57266a6e | 2753 | static __be32 nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
2754 | { |
2755 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 2756 | struct nfsd4_conn *c; |
57266a6e | 2757 | __be32 status = nfs_ok; |
21b75b01 | 2758 | int ret; |
328ead28 BF |
2759 | |
2760 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 2761 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
57266a6e BF |
2762 | if (c) |
2763 | goto out_free; | |
2764 | status = nfserr_conn_not_bound_to_session; | |
2765 | if (clp->cl_mach_cred) | |
2766 | goto out_free; | |
328ead28 BF |
2767 | __nfsd4_hash_conn(new, ses); |
2768 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
2769 | ret = nfsd4_register_conn(new); |
2770 | if (ret) | |
2771 | /* oops; xprt is already down: */ | |
2772 | nfsd4_conn_lost(&new->cn_xpt_user); | |
57266a6e BF |
2773 | return nfs_ok; |
2774 | out_free: | |
2775 | spin_unlock(&clp->cl_lock); | |
2776 | free_conn(new); | |
2777 | return status; | |
328ead28 BF |
2778 | } |
2779 | ||
868b89c3 MJ |
2780 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
2781 | { | |
2782 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
2783 | ||
2784 | return args->opcnt > session->se_fchannel.maxops; | |
2785 | } | |
2786 | ||
ae82a8d0 MJ |
2787 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
2788 | struct nfsd4_session *session) | |
2789 | { | |
2790 | struct xdr_buf *xb = &rqstp->rq_arg; | |
2791 | ||
2792 | return xb->len > session->se_fchannel.maxreq_sz; | |
2793 | } | |
2794 | ||
069b6ad4 | 2795 | __be32 |
b85d4c01 | 2796 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
2797 | struct nfsd4_compound_state *cstate, |
2798 | struct nfsd4_sequence *seq) | |
2799 | { | |
f9bb94c4 | 2800 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
47ee5298 | 2801 | struct xdr_stream *xdr = &resp->xdr; |
b85d4c01 | 2802 | struct nfsd4_session *session; |
221a6876 | 2803 | struct nfs4_client *clp; |
b85d4c01 | 2804 | struct nfsd4_slot *slot; |
a663bdd8 | 2805 | struct nfsd4_conn *conn; |
57b7b43b | 2806 | __be32 status; |
47ee5298 | 2807 | int buflen; |
d4e19e70 TM |
2808 | struct net *net = SVC_NET(rqstp); |
2809 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
b85d4c01 | 2810 | |
f9bb94c4 AA |
2811 | if (resp->opcnt != 1) |
2812 | return nfserr_sequence_pos; | |
2813 | ||
a663bdd8 BF |
2814 | /* |
2815 | * Will be either used or freed by nfsd4_sequence_check_conn | |
2816 | * below. | |
2817 | */ | |
2818 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
2819 | if (!conn) | |
2820 | return nfserr_jukebox; | |
2821 | ||
c9a49628 | 2822 | spin_lock(&nn->client_lock); |
d4e19e70 | 2823 | session = find_in_sessionid_hashtbl(&seq->sessionid, net, &status); |
b85d4c01 | 2824 | if (!session) |
221a6876 BF |
2825 | goto out_no_session; |
2826 | clp = session->se_client; | |
b85d4c01 | 2827 | |
868b89c3 MJ |
2828 | status = nfserr_too_many_ops; |
2829 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
66b2b9b2 | 2830 | goto out_put_session; |
868b89c3 | 2831 | |
ae82a8d0 MJ |
2832 | status = nfserr_req_too_big; |
2833 | if (nfsd4_request_too_big(rqstp, session)) | |
66b2b9b2 | 2834 | goto out_put_session; |
ae82a8d0 | 2835 | |
b85d4c01 | 2836 | status = nfserr_badslot; |
6c18ba9f | 2837 | if (seq->slotid >= session->se_fchannel.maxreqs) |
66b2b9b2 | 2838 | goto out_put_session; |
b85d4c01 | 2839 | |
557ce264 | 2840 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
2841 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
2842 | ||
a8dfdaeb AA |
2843 | /* We do not negotiate the number of slots yet, so set the |
2844 | * maxslots to the session maxreqs which is used to encode | |
2845 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
2846 | seq->maxslots = session->se_fchannel.maxreqs; | |
2847 | ||
73e79482 BF |
2848 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, |
2849 | slot->sl_flags & NFSD4_SLOT_INUSE); | |
b85d4c01 | 2850 | if (status == nfserr_replay_cache) { |
bf5c43c8 BF |
2851 | status = nfserr_seq_misordered; |
2852 | if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) | |
66b2b9b2 | 2853 | goto out_put_session; |
b85d4c01 BH |
2854 | cstate->slot = slot; |
2855 | cstate->session = session; | |
4b24ca7d | 2856 | cstate->clp = clp; |
da3846a2 | 2857 | /* Return the cached reply status and set cstate->status |
557ce264 | 2858 | * for nfsd4_proc_compound processing */ |
bf864a31 | 2859 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 2860 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 2861 | goto out; |
b85d4c01 BH |
2862 | } |
2863 | if (status) | |
66b2b9b2 | 2864 | goto out_put_session; |
b85d4c01 | 2865 | |
57266a6e | 2866 | status = nfsd4_sequence_check_conn(conn, session); |
a663bdd8 | 2867 | conn = NULL; |
57266a6e BF |
2868 | if (status) |
2869 | goto out_put_session; | |
328ead28 | 2870 | |
47ee5298 BF |
2871 | buflen = (seq->cachethis) ? |
2872 | session->se_fchannel.maxresp_cached : | |
2873 | session->se_fchannel.maxresp_sz; | |
2874 | status = (seq->cachethis) ? nfserr_rep_too_big_to_cache : | |
2875 | nfserr_rep_too_big; | |
a5cddc88 | 2876 | if (xdr_restrict_buflen(xdr, buflen - rqstp->rq_auth_slack)) |
47ee5298 | 2877 | goto out_put_session; |
32aaa62e | 2878 | svc_reserve(rqstp, buflen); |
47ee5298 BF |
2879 | |
2880 | status = nfs_ok; | |
b85d4c01 | 2881 | /* Success! bump slot seqid */ |
b85d4c01 | 2882 | slot->sl_seqid = seq->seqid; |
bf5c43c8 | 2883 | slot->sl_flags |= NFSD4_SLOT_INUSE; |
73e79482 BF |
2884 | if (seq->cachethis) |
2885 | slot->sl_flags |= NFSD4_SLOT_CACHETHIS; | |
bf5c43c8 BF |
2886 | else |
2887 | slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; | |
b85d4c01 BH |
2888 | |
2889 | cstate->slot = slot; | |
2890 | cstate->session = session; | |
4b24ca7d | 2891 | cstate->clp = clp; |
b85d4c01 | 2892 | |
b85d4c01 | 2893 | out: |
221a6876 BF |
2894 | switch (clp->cl_cb_state) { |
2895 | case NFSD4_CB_DOWN: | |
2896 | seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; | |
2897 | break; | |
2898 | case NFSD4_CB_FAULT: | |
2899 | seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; | |
2900 | break; | |
2901 | default: | |
2902 | seq->status_flags = 0; | |
aaf84eb9 | 2903 | } |
3bd64a5b BF |
2904 | if (!list_empty(&clp->cl_revoked)) |
2905 | seq->status_flags |= SEQ4_STATUS_RECALLABLE_STATE_REVOKED; | |
221a6876 | 2906 | out_no_session: |
3f42d2c4 KM |
2907 | if (conn) |
2908 | free_conn(conn); | |
c9a49628 | 2909 | spin_unlock(&nn->client_lock); |
b85d4c01 | 2910 | return status; |
66b2b9b2 | 2911 | out_put_session: |
d4e19e70 | 2912 | nfsd4_put_session_locked(session); |
221a6876 | 2913 | goto out_no_session; |
069b6ad4 AA |
2914 | } |
2915 | ||
b607664e TM |
2916 | void |
2917 | nfsd4_sequence_done(struct nfsd4_compoundres *resp) | |
2918 | { | |
2919 | struct nfsd4_compound_state *cs = &resp->cstate; | |
2920 | ||
2921 | if (nfsd4_has_session(cs)) { | |
b607664e TM |
2922 | if (cs->status != nfserr_replay_cache) { |
2923 | nfsd4_store_cache_entry(resp); | |
2924 | cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE; | |
2925 | } | |
d4e19e70 | 2926 | /* Drop session reference that was taken in nfsd4_sequence() */ |
b607664e | 2927 | nfsd4_put_session(cs->session); |
4b24ca7d JL |
2928 | } else if (cs->clp) |
2929 | put_client_renew(cs->clp); | |
b607664e TM |
2930 | } |
2931 | ||
345c2842 MJ |
2932 | __be32 |
2933 | nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) | |
2934 | { | |
6b10ad19 TM |
2935 | struct nfs4_client *conf, *unconf; |
2936 | struct nfs4_client *clp = NULL; | |
57b7b43b | 2937 | __be32 status = 0; |
8daae4dc | 2938 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
345c2842 | 2939 | |
6b10ad19 | 2940 | spin_lock(&nn->client_lock); |
0a7ec377 | 2941 | unconf = find_unconfirmed_client(&dc->clientid, true, nn); |
8daae4dc | 2942 | conf = find_confirmed_client(&dc->clientid, true, nn); |
78389046 | 2943 | WARN_ON_ONCE(conf && unconf); |
345c2842 MJ |
2944 | |
2945 | if (conf) { | |
c0293b01 | 2946 | if (client_has_state(conf)) { |
345c2842 MJ |
2947 | status = nfserr_clientid_busy; |
2948 | goto out; | |
2949 | } | |
fd699b8a JL |
2950 | status = mark_client_expired_locked(conf); |
2951 | if (status) | |
2952 | goto out; | |
6b10ad19 | 2953 | clp = conf; |
345c2842 MJ |
2954 | } else if (unconf) |
2955 | clp = unconf; | |
2956 | else { | |
2957 | status = nfserr_stale_clientid; | |
2958 | goto out; | |
2959 | } | |
57266a6e | 2960 | if (!mach_creds_match(clp, rqstp)) { |
6b10ad19 | 2961 | clp = NULL; |
57266a6e BF |
2962 | status = nfserr_wrong_cred; |
2963 | goto out; | |
2964 | } | |
6b10ad19 | 2965 | unhash_client_locked(clp); |
345c2842 | 2966 | out: |
6b10ad19 | 2967 | spin_unlock(&nn->client_lock); |
6b10ad19 TM |
2968 | if (clp) |
2969 | expire_client(clp); | |
345c2842 MJ |
2970 | return status; |
2971 | } | |
2972 | ||
4dc6ec00 BF |
2973 | __be32 |
2974 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
2975 | { | |
57b7b43b | 2976 | __be32 status = 0; |
bcecf1cc | 2977 | |
4dc6ec00 BF |
2978 | if (rc->rca_one_fs) { |
2979 | if (!cstate->current_fh.fh_dentry) | |
2980 | return nfserr_nofilehandle; | |
2981 | /* | |
2982 | * We don't take advantage of the rca_one_fs case. | |
2983 | * That's OK, it's optional, we can safely ignore it. | |
2984 | */ | |
2985 | return nfs_ok; | |
2986 | } | |
bcecf1cc | 2987 | |
bcecf1cc | 2988 | status = nfserr_complete_already; |
a52d726b JL |
2989 | if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, |
2990 | &cstate->session->se_client->cl_flags)) | |
bcecf1cc MJ |
2991 | goto out; |
2992 | ||
2993 | status = nfserr_stale_clientid; | |
2994 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
2995 | /* |
2996 | * The following error isn't really legal. | |
2997 | * But we only get here if the client just explicitly | |
2998 | * destroyed the client. Surely it no longer cares what | |
2999 | * error it gets back on an operation for the dead | |
3000 | * client. | |
3001 | */ | |
bcecf1cc MJ |
3002 | goto out; |
3003 | ||
3004 | status = nfs_ok; | |
2a4317c5 | 3005 | nfsd4_client_record_create(cstate->session->se_client); |
bcecf1cc | 3006 | out: |
bcecf1cc | 3007 | return status; |
4dc6ec00 BF |
3008 | } |
3009 | ||
b37ad28b | 3010 | __be32 |
b591480b BF |
3011 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3012 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 3013 | { |
a084daf5 | 3014 | struct xdr_netobj clname = setclid->se_name; |
1da177e4 | 3015 | nfs4_verifier clverifier = setclid->se_verf; |
3dbacee6 TM |
3016 | struct nfs4_client *conf, *new; |
3017 | struct nfs4_client *unconf = NULL; | |
b37ad28b | 3018 | __be32 status; |
c212cecf SK |
3019 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
3020 | ||
5cc40fd7 TM |
3021 | new = create_client(clname, rqstp, &clverifier); |
3022 | if (new == NULL) | |
3023 | return nfserr_jukebox; | |
63db4632 | 3024 | /* Cases below refer to rfc 3530 section 14.2.33: */ |
3dbacee6 | 3025 | spin_lock(&nn->client_lock); |
382a62e7 | 3026 | conf = find_confirmed_client_by_name(&clname, nn); |
28ce6054 | 3027 | if (conf) { |
63db4632 | 3028 | /* case 0: */ |
1da177e4 | 3029 | status = nfserr_clid_inuse; |
e203d506 BF |
3030 | if (clp_used_exchangeid(conf)) |
3031 | goto out; | |
026722c2 | 3032 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
3033 | char addr_str[INET6_ADDRSTRLEN]; |
3034 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
3035 | sizeof(addr_str)); | |
3036 | dprintk("NFSD: setclientid: string in use by client " | |
3037 | "at %s\n", addr_str); | |
1da177e4 LT |
3038 | goto out; |
3039 | } | |
1da177e4 | 3040 | } |
a99454aa | 3041 | unconf = find_unconfirmed_client_by_name(&clname, nn); |
8f930711 | 3042 | if (unconf) |
3dbacee6 | 3043 | unhash_client_locked(unconf); |
34b232bb | 3044 | if (conf && same_verf(&conf->cl_verifier, &clverifier)) |
63db4632 | 3045 | /* case 1: probable callback update */ |
1da177e4 | 3046 | copy_clid(new, conf); |
34b232bb | 3047 | else /* case 4 (new client) or cases 2, 3 (client reboot): */ |
c212cecf | 3048 | gen_clid(new, nn); |
8323c3b2 | 3049 | new->cl_minorversion = 0; |
6f3d772f | 3050 | gen_callback(new, setclid, rqstp); |
ac55fdc4 | 3051 | add_to_unconfirmed(new); |
1da177e4 LT |
3052 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
3053 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
3054 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
5cc40fd7 | 3055 | new = NULL; |
1da177e4 LT |
3056 | status = nfs_ok; |
3057 | out: | |
3dbacee6 | 3058 | spin_unlock(&nn->client_lock); |
5cc40fd7 TM |
3059 | if (new) |
3060 | free_client(new); | |
3dbacee6 TM |
3061 | if (unconf) |
3062 | expire_client(unconf); | |
1da177e4 LT |
3063 | return status; |
3064 | } | |
3065 | ||
3066 | ||
b37ad28b | 3067 | __be32 |
b591480b BF |
3068 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
3069 | struct nfsd4_compound_state *cstate, | |
3070 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 3071 | { |
21ab45a4 | 3072 | struct nfs4_client *conf, *unconf; |
d20c11d8 | 3073 | struct nfs4_client *old = NULL; |
1da177e4 LT |
3074 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
3075 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 3076 | __be32 status; |
7f2210fa | 3077 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 3078 | |
2c142baa | 3079 | if (STALE_CLIENTID(clid, nn)) |
1da177e4 | 3080 | return nfserr_stale_clientid; |
21ab45a4 | 3081 | |
d20c11d8 | 3082 | spin_lock(&nn->client_lock); |
8daae4dc | 3083 | conf = find_confirmed_client(clid, false, nn); |
0a7ec377 | 3084 | unconf = find_unconfirmed_client(clid, false, nn); |
a186e767 | 3085 | /* |
8695b90a BF |
3086 | * We try hard to give out unique clientid's, so if we get an |
3087 | * attempt to confirm the same clientid with a different cred, | |
3088 | * there's a bug somewhere. Let's charitably assume it's our | |
3089 | * bug. | |
a186e767 | 3090 | */ |
8695b90a BF |
3091 | status = nfserr_serverfault; |
3092 | if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) | |
3093 | goto out; | |
3094 | if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) | |
3095 | goto out; | |
63db4632 | 3096 | /* cases below refer to rfc 3530 section 14.2.34: */ |
90d700b7 BF |
3097 | if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) { |
3098 | if (conf && !unconf) /* case 2: probable retransmit */ | |
1da177e4 | 3099 | status = nfs_ok; |
90d700b7 BF |
3100 | else /* case 4: client hasn't noticed we rebooted yet? */ |
3101 | status = nfserr_stale_clientid; | |
3102 | goto out; | |
3103 | } | |
3104 | status = nfs_ok; | |
3105 | if (conf) { /* case 1: callback update */ | |
d20c11d8 JL |
3106 | old = unconf; |
3107 | unhash_client_locked(old); | |
8695b90a | 3108 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
90d700b7 | 3109 | } else { /* case 3: normal case; new or rebooted client */ |
d20c11d8 JL |
3110 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
3111 | if (old) { | |
3112 | status = mark_client_expired_locked(old); | |
7abea1e8 JL |
3113 | if (status) { |
3114 | old = NULL; | |
221a6876 | 3115 | goto out; |
7abea1e8 | 3116 | } |
221a6876 | 3117 | } |
8695b90a | 3118 | move_to_confirmed(unconf); |
d20c11d8 | 3119 | conf = unconf; |
08e8987c | 3120 | } |
d20c11d8 JL |
3121 | get_client_locked(conf); |
3122 | spin_unlock(&nn->client_lock); | |
3123 | nfsd4_probe_callback(conf); | |
3124 | spin_lock(&nn->client_lock); | |
3125 | put_client_renew_locked(conf); | |
1da177e4 | 3126 | out: |
d20c11d8 JL |
3127 | spin_unlock(&nn->client_lock); |
3128 | if (old) | |
3129 | expire_client(old); | |
1da177e4 LT |
3130 | return status; |
3131 | } | |
3132 | ||
32513b40 BF |
3133 | static struct nfs4_file *nfsd4_alloc_file(void) |
3134 | { | |
3135 | return kmem_cache_alloc(file_slab, GFP_KERNEL); | |
3136 | } | |
3137 | ||
1da177e4 | 3138 | /* OPEN Share state helper functions */ |
5b095e99 JL |
3139 | static void nfsd4_init_file(struct knfsd_fh *fh, unsigned int hashval, |
3140 | struct nfs4_file *fp) | |
1da177e4 | 3141 | { |
950e0118 TM |
3142 | lockdep_assert_held(&state_lock); |
3143 | ||
32513b40 | 3144 | atomic_set(&fp->fi_ref, 1); |
1d31a253 | 3145 | spin_lock_init(&fp->fi_lock); |
32513b40 BF |
3146 | INIT_LIST_HEAD(&fp->fi_stateids); |
3147 | INIT_LIST_HEAD(&fp->fi_delegations); | |
8287f009 | 3148 | INIT_LIST_HEAD(&fp->fi_clnt_odstate); |
e2cf80d7 | 3149 | fh_copy_shallow(&fp->fi_fhandle, fh); |
0c637be8 | 3150 | fp->fi_deleg_file = NULL; |
32513b40 | 3151 | fp->fi_had_conflict = false; |
baeb4ff0 | 3152 | fp->fi_share_deny = 0; |
32513b40 BF |
3153 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); |
3154 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
9cf514cc CH |
3155 | #ifdef CONFIG_NFSD_PNFS |
3156 | INIT_LIST_HEAD(&fp->fi_lo_states); | |
c5c707f9 | 3157 | atomic_set(&fp->fi_lo_recalls, 0); |
9cf514cc | 3158 | #endif |
5b095e99 | 3159 | hlist_add_head_rcu(&fp->fi_hash, &file_hashtbl[hashval]); |
1da177e4 LT |
3160 | } |
3161 | ||
e8ff2a84 | 3162 | void |
1da177e4 LT |
3163 | nfsd4_free_slabs(void) |
3164 | { | |
8287f009 | 3165 | kmem_cache_destroy(odstate_slab); |
abf1135b CH |
3166 | kmem_cache_destroy(openowner_slab); |
3167 | kmem_cache_destroy(lockowner_slab); | |
3168 | kmem_cache_destroy(file_slab); | |
3169 | kmem_cache_destroy(stateid_slab); | |
3170 | kmem_cache_destroy(deleg_slab); | |
e60d4398 | 3171 | } |
1da177e4 | 3172 | |
72083396 | 3173 | int |
e60d4398 N |
3174 | nfsd4_init_slabs(void) |
3175 | { | |
fe0750e5 BF |
3176 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
3177 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
3178 | if (openowner_slab == NULL) | |
abf1135b | 3179 | goto out; |
fe0750e5 | 3180 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", |
3c40794b | 3181 | sizeof(struct nfs4_lockowner), 0, 0, NULL); |
fe0750e5 | 3182 | if (lockowner_slab == NULL) |
abf1135b | 3183 | goto out_free_openowner_slab; |
e60d4398 | 3184 | file_slab = kmem_cache_create("nfsd4_files", |
20c2df83 | 3185 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 | 3186 | if (file_slab == NULL) |
abf1135b | 3187 | goto out_free_lockowner_slab; |
5ac049ac | 3188 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
dcef0413 | 3189 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
5ac049ac | 3190 | if (stateid_slab == NULL) |
abf1135b | 3191 | goto out_free_file_slab; |
5b2d21c1 | 3192 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 3193 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 | 3194 | if (deleg_slab == NULL) |
abf1135b | 3195 | goto out_free_stateid_slab; |
8287f009 SB |
3196 | odstate_slab = kmem_cache_create("nfsd4_odstate", |
3197 | sizeof(struct nfs4_clnt_odstate), 0, 0, NULL); | |
3198 | if (odstate_slab == NULL) | |
3199 | goto out_free_deleg_slab; | |
e60d4398 | 3200 | return 0; |
abf1135b | 3201 | |
8287f009 SB |
3202 | out_free_deleg_slab: |
3203 | kmem_cache_destroy(deleg_slab); | |
abf1135b CH |
3204 | out_free_stateid_slab: |
3205 | kmem_cache_destroy(stateid_slab); | |
3206 | out_free_file_slab: | |
3207 | kmem_cache_destroy(file_slab); | |
3208 | out_free_lockowner_slab: | |
3209 | kmem_cache_destroy(lockowner_slab); | |
3210 | out_free_openowner_slab: | |
3211 | kmem_cache_destroy(openowner_slab); | |
3212 | out: | |
e60d4398 N |
3213 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); |
3214 | return -ENOMEM; | |
1da177e4 LT |
3215 | } |
3216 | ||
ff194bd9 | 3217 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 3218 | { |
ff194bd9 BF |
3219 | rp->rp_status = nfserr_serverfault; |
3220 | rp->rp_buflen = 0; | |
3221 | rp->rp_buf = rp->rp_ibuf; | |
58fb12e6 JL |
3222 | mutex_init(&rp->rp_mutex); |
3223 | } | |
3224 | ||
3225 | static void nfsd4_cstate_assign_replay(struct nfsd4_compound_state *cstate, | |
3226 | struct nfs4_stateowner *so) | |
3227 | { | |
3228 | if (!nfsd4_has_session(cstate)) { | |
3229 | mutex_lock(&so->so_replay.rp_mutex); | |
b5971afa | 3230 | cstate->replay_owner = nfs4_get_stateowner(so); |
58fb12e6 JL |
3231 | } |
3232 | } | |
3233 | ||
3234 | void nfsd4_cstate_clear_replay(struct nfsd4_compound_state *cstate) | |
3235 | { | |
3236 | struct nfs4_stateowner *so = cstate->replay_owner; | |
3237 | ||
3238 | if (so != NULL) { | |
3239 | cstate->replay_owner = NULL; | |
3240 | mutex_unlock(&so->so_replay.rp_mutex); | |
3241 | nfs4_put_stateowner(so); | |
3242 | } | |
1da177e4 LT |
3243 | } |
3244 | ||
fe0750e5 | 3245 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 3246 | { |
1da177e4 | 3247 | struct nfs4_stateowner *sop; |
1da177e4 | 3248 | |
fe0750e5 | 3249 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
3250 | if (!sop) |
3251 | return NULL; | |
3252 | ||
3253 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); | |
3254 | if (!sop->so_owner.data) { | |
fe0750e5 | 3255 | kmem_cache_free(slab, sop); |
1da177e4 | 3256 | return NULL; |
ff194bd9 BF |
3257 | } |
3258 | sop->so_owner.len = owner->len; | |
3259 | ||
ea1da636 | 3260 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 BF |
3261 | sop->so_client = clp; |
3262 | init_nfs4_replay(&sop->so_replay); | |
6b180f0b | 3263 | atomic_set(&sop->so_count, 1); |
ff194bd9 BF |
3264 | return sop; |
3265 | } | |
3266 | ||
fe0750e5 | 3267 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 | 3268 | { |
d4f0489f | 3269 | lockdep_assert_held(&clp->cl_lock); |
9b531137 | 3270 | |
d4f0489f TM |
3271 | list_add(&oo->oo_owner.so_strhash, |
3272 | &clp->cl_ownerstr_hashtbl[strhashval]); | |
fe0750e5 | 3273 | list_add(&oo->oo_perclient, &clp->cl_openowners); |
ff194bd9 BF |
3274 | } |
3275 | ||
8f4b54c5 JL |
3276 | static void nfs4_unhash_openowner(struct nfs4_stateowner *so) |
3277 | { | |
d4f0489f | 3278 | unhash_openowner_locked(openowner(so)); |
8f4b54c5 JL |
3279 | } |
3280 | ||
6b180f0b JL |
3281 | static void nfs4_free_openowner(struct nfs4_stateowner *so) |
3282 | { | |
3283 | struct nfs4_openowner *oo = openowner(so); | |
3284 | ||
3285 | kmem_cache_free(openowner_slab, oo); | |
3286 | } | |
3287 | ||
3288 | static const struct nfs4_stateowner_operations openowner_ops = { | |
8f4b54c5 JL |
3289 | .so_unhash = nfs4_unhash_openowner, |
3290 | .so_free = nfs4_free_openowner, | |
6b180f0b JL |
3291 | }; |
3292 | ||
fe0750e5 | 3293 | static struct nfs4_openowner * |
13d6f66b | 3294 | alloc_init_open_stateowner(unsigned int strhashval, struct nfsd4_open *open, |
db24b3b4 JL |
3295 | struct nfsd4_compound_state *cstate) |
3296 | { | |
13d6f66b | 3297 | struct nfs4_client *clp = cstate->clp; |
7ffb5880 | 3298 | struct nfs4_openowner *oo, *ret; |
ff194bd9 | 3299 | |
fe0750e5 BF |
3300 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
3301 | if (!oo) | |
ff194bd9 | 3302 | return NULL; |
6b180f0b | 3303 | oo->oo_owner.so_ops = &openowner_ops; |
fe0750e5 BF |
3304 | oo->oo_owner.so_is_open_owner = 1; |
3305 | oo->oo_owner.so_seqid = open->op_seqid; | |
d3134b10 | 3306 | oo->oo_flags = 0; |
db24b3b4 JL |
3307 | if (nfsd4_has_session(cstate)) |
3308 | oo->oo_flags |= NFS4_OO_CONFIRMED; | |
fe0750e5 | 3309 | oo->oo_time = 0; |
38c387b5 | 3310 | oo->oo_last_closed_stid = NULL; |
fe0750e5 | 3311 | INIT_LIST_HEAD(&oo->oo_close_lru); |
d4f0489f TM |
3312 | spin_lock(&clp->cl_lock); |
3313 | ret = find_openstateowner_str_locked(strhashval, open, clp); | |
7ffb5880 TM |
3314 | if (ret == NULL) { |
3315 | hash_openowner(oo, clp, strhashval); | |
3316 | ret = oo; | |
3317 | } else | |
3318 | nfs4_free_openowner(&oo->oo_owner); | |
d4f0489f | 3319 | spin_unlock(&clp->cl_lock); |
c5952338 | 3320 | return ret; |
1da177e4 LT |
3321 | } |
3322 | ||
996e0938 | 3323 | static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { |
fe0750e5 | 3324 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 3325 | |
d6f2bc5d | 3326 | atomic_inc(&stp->st_stid.sc_count); |
3abdb607 | 3327 | stp->st_stid.sc_type = NFS4_OPEN_STID; |
3c87b9b7 | 3328 | INIT_LIST_HEAD(&stp->st_locks); |
b5971afa | 3329 | stp->st_stateowner = nfs4_get_stateowner(&oo->oo_owner); |
13cd2184 | 3330 | get_nfs4_file(fp); |
11b9164a | 3331 | stp->st_stid.sc_file = fp; |
1da177e4 LT |
3332 | stp->st_access_bmap = 0; |
3333 | stp->st_deny_bmap = 0; | |
4c4cd222 | 3334 | stp->st_openstp = NULL; |
1c755dc1 JL |
3335 | spin_lock(&oo->oo_owner.so_client->cl_lock); |
3336 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); | |
1d31a253 TM |
3337 | spin_lock(&fp->fi_lock); |
3338 | list_add(&stp->st_perfile, &fp->fi_stateids); | |
3339 | spin_unlock(&fp->fi_lock); | |
1c755dc1 | 3340 | spin_unlock(&oo->oo_owner.so_client->cl_lock); |
1da177e4 LT |
3341 | } |
3342 | ||
d3134b10 JL |
3343 | /* |
3344 | * In the 4.0 case we need to keep the owners around a little while to handle | |
3345 | * CLOSE replay. We still do need to release any file access that is held by | |
3346 | * them before returning however. | |
3347 | */ | |
fd39ca9a | 3348 | static void |
d3134b10 | 3349 | move_to_close_lru(struct nfs4_ol_stateid *s, struct net *net) |
1da177e4 | 3350 | { |
217526e7 | 3351 | struct nfs4_ol_stateid *last; |
d3134b10 JL |
3352 | struct nfs4_openowner *oo = openowner(s->st_stateowner); |
3353 | struct nfsd_net *nn = net_generic(s->st_stid.sc_client->net, | |
3354 | nfsd_net_id); | |
73758fed | 3355 | |
fe0750e5 | 3356 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 3357 | |
b401be22 JL |
3358 | /* |
3359 | * We know that we hold one reference via nfsd4_close, and another | |
3360 | * "persistent" reference for the client. If the refcount is higher | |
3361 | * than 2, then there are still calls in progress that are using this | |
3362 | * stateid. We can't put the sc_file reference until they are finished. | |
3363 | * Wait for the refcount to drop to 2. Since it has been unhashed, | |
3364 | * there should be no danger of the refcount going back up again at | |
3365 | * this point. | |
3366 | */ | |
3367 | wait_event(close_wq, atomic_read(&s->st_stid.sc_count) == 2); | |
3368 | ||
d3134b10 JL |
3369 | release_all_access(s); |
3370 | if (s->st_stid.sc_file) { | |
3371 | put_nfs4_file(s->st_stid.sc_file); | |
3372 | s->st_stid.sc_file = NULL; | |
3373 | } | |
217526e7 JL |
3374 | |
3375 | spin_lock(&nn->client_lock); | |
3376 | last = oo->oo_last_closed_stid; | |
d3134b10 | 3377 | oo->oo_last_closed_stid = s; |
73758fed | 3378 | list_move_tail(&oo->oo_close_lru, &nn->close_lru); |
fe0750e5 | 3379 | oo->oo_time = get_seconds(); |
217526e7 JL |
3380 | spin_unlock(&nn->client_lock); |
3381 | if (last) | |
3382 | nfs4_put_stid(&last->st_stid); | |
1da177e4 LT |
3383 | } |
3384 | ||
1da177e4 LT |
3385 | /* search file_hashtbl[] for file */ |
3386 | static struct nfs4_file * | |
5b095e99 | 3387 | find_file_locked(struct knfsd_fh *fh, unsigned int hashval) |
1da177e4 | 3388 | { |
1da177e4 LT |
3389 | struct nfs4_file *fp; |
3390 | ||
5b095e99 | 3391 | hlist_for_each_entry_rcu(fp, &file_hashtbl[hashval], fi_hash) { |
4d94c2ef | 3392 | if (fh_match(&fp->fi_fhandle, fh)) { |
5b095e99 JL |
3393 | if (atomic_inc_not_zero(&fp->fi_ref)) |
3394 | return fp; | |
13cd2184 | 3395 | } |
1da177e4 LT |
3396 | } |
3397 | return NULL; | |
3398 | } | |
3399 | ||
e6ba76e1 | 3400 | struct nfs4_file * |
ca943217 | 3401 | find_file(struct knfsd_fh *fh) |
950e0118 TM |
3402 | { |
3403 | struct nfs4_file *fp; | |
5b095e99 | 3404 | unsigned int hashval = file_hashval(fh); |
950e0118 | 3405 | |
5b095e99 JL |
3406 | rcu_read_lock(); |
3407 | fp = find_file_locked(fh, hashval); | |
3408 | rcu_read_unlock(); | |
950e0118 TM |
3409 | return fp; |
3410 | } | |
3411 | ||
3412 | static struct nfs4_file * | |
f9c00c3a | 3413 | find_or_add_file(struct nfs4_file *new, struct knfsd_fh *fh) |
950e0118 TM |
3414 | { |
3415 | struct nfs4_file *fp; | |
5b095e99 JL |
3416 | unsigned int hashval = file_hashval(fh); |
3417 | ||
3418 | rcu_read_lock(); | |
3419 | fp = find_file_locked(fh, hashval); | |
3420 | rcu_read_unlock(); | |
3421 | if (fp) | |
3422 | return fp; | |
950e0118 TM |
3423 | |
3424 | spin_lock(&state_lock); | |
5b095e99 JL |
3425 | fp = find_file_locked(fh, hashval); |
3426 | if (likely(fp == NULL)) { | |
3427 | nfsd4_init_file(fh, hashval, new); | |
950e0118 TM |
3428 | fp = new; |
3429 | } | |
3430 | spin_unlock(&state_lock); | |
3431 | ||
3432 | return fp; | |
3433 | } | |
3434 | ||
1da177e4 LT |
3435 | /* |
3436 | * Called to check deny when READ with all zero stateid or | |
3437 | * WRITE with all zero or all one stateid | |
3438 | */ | |
b37ad28b | 3439 | static __be32 |
1da177e4 LT |
3440 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
3441 | { | |
1da177e4 | 3442 | struct nfs4_file *fp; |
baeb4ff0 | 3443 | __be32 ret = nfs_ok; |
1da177e4 | 3444 | |
ca943217 | 3445 | fp = find_file(¤t_fh->fh_handle); |
13cd2184 | 3446 | if (!fp) |
baeb4ff0 JL |
3447 | return ret; |
3448 | /* Check for conflicting share reservations */ | |
1d31a253 | 3449 | spin_lock(&fp->fi_lock); |
baeb4ff0 JL |
3450 | if (fp->fi_share_deny & deny_type) |
3451 | ret = nfserr_locked; | |
1d31a253 | 3452 | spin_unlock(&fp->fi_lock); |
13cd2184 N |
3453 | put_nfs4_file(fp); |
3454 | return ret; | |
1da177e4 LT |
3455 | } |
3456 | ||
0162ac2b | 3457 | static void nfsd4_cb_recall_prepare(struct nfsd4_callback *cb) |
1da177e4 | 3458 | { |
0162ac2b | 3459 | struct nfs4_delegation *dp = cb_to_delegation(cb); |
11b9164a TM |
3460 | struct nfsd_net *nn = net_generic(dp->dl_stid.sc_client->net, |
3461 | nfsd_net_id); | |
e8c69d17 | 3462 | |
11b9164a | 3463 | block_delegations(&dp->dl_stid.sc_file->fi_fhandle); |
f54fe962 | 3464 | |
dff1399f | 3465 | /* |
f54fe962 JL |
3466 | * We can't do this in nfsd_break_deleg_cb because it is |
3467 | * already holding inode->i_lock. | |
3468 | * | |
dff1399f JL |
3469 | * If the dl_time != 0, then we know that it has already been |
3470 | * queued for a lease break. Don't queue it again. | |
3471 | */ | |
f54fe962 | 3472 | spin_lock(&state_lock); |
dff1399f | 3473 | if (dp->dl_time == 0) { |
dff1399f | 3474 | dp->dl_time = get_seconds(); |
02e1215f | 3475 | list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru); |
dff1399f | 3476 | } |
02e1215f JL |
3477 | spin_unlock(&state_lock); |
3478 | } | |
1da177e4 | 3479 | |
0162ac2b CH |
3480 | static int nfsd4_cb_recall_done(struct nfsd4_callback *cb, |
3481 | struct rpc_task *task) | |
3482 | { | |
3483 | struct nfs4_delegation *dp = cb_to_delegation(cb); | |
3484 | ||
3485 | switch (task->tk_status) { | |
3486 | case 0: | |
3487 | return 1; | |
3488 | case -EBADHANDLE: | |
3489 | case -NFS4ERR_BAD_STATEID: | |
3490 | /* | |
3491 | * Race: client probably got cb_recall before open reply | |
3492 | * granting delegation. | |
3493 | */ | |
3494 | if (dp->dl_retries--) { | |
3495 | rpc_delay(task, 2 * HZ); | |
3496 | return 0; | |
3497 | } | |
3498 | /*FALLTHRU*/ | |
3499 | default: | |
3500 | return -1; | |
3501 | } | |
3502 | } | |
3503 | ||
3504 | static void nfsd4_cb_recall_release(struct nfsd4_callback *cb) | |
3505 | { | |
3506 | struct nfs4_delegation *dp = cb_to_delegation(cb); | |
3507 | ||
3508 | nfs4_put_stid(&dp->dl_stid); | |
3509 | } | |
3510 | ||
3511 | static struct nfsd4_callback_ops nfsd4_cb_recall_ops = { | |
3512 | .prepare = nfsd4_cb_recall_prepare, | |
3513 | .done = nfsd4_cb_recall_done, | |
3514 | .release = nfsd4_cb_recall_release, | |
3515 | }; | |
3516 | ||
02e1215f JL |
3517 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
3518 | { | |
3519 | /* | |
3520 | * We're assuming the state code never drops its reference | |
3521 | * without first removing the lease. Since we're in this lease | |
3522 | * callback (and since the lease code is serialized by the kernel | |
3523 | * lock) we know the server hasn't removed the lease yet, we know | |
3524 | * it's safe to take a reference. | |
3525 | */ | |
72c0b0fb | 3526 | atomic_inc(&dp->dl_stid.sc_count); |
f0b5de1b | 3527 | nfsd4_run_cb(&dp->dl_recall); |
6b57d9c8 BF |
3528 | } |
3529 | ||
1c8c601a | 3530 | /* Called from break_lease() with i_lock held. */ |
4d01b7f5 JL |
3531 | static bool |
3532 | nfsd_break_deleg_cb(struct file_lock *fl) | |
6b57d9c8 | 3533 | { |
4d01b7f5 | 3534 | bool ret = false; |
acfdf5c3 BF |
3535 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
3536 | struct nfs4_delegation *dp; | |
6b57d9c8 | 3537 | |
7fa10cd1 BF |
3538 | if (!fp) { |
3539 | WARN(1, "(%p)->fl_owner NULL\n", fl); | |
4d01b7f5 | 3540 | return ret; |
7fa10cd1 BF |
3541 | } |
3542 | if (fp->fi_had_conflict) { | |
3543 | WARN(1, "duplicate break on %p\n", fp); | |
4d01b7f5 | 3544 | return ret; |
7fa10cd1 | 3545 | } |
0272e1fd BF |
3546 | /* |
3547 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 3548 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 3549 | * in time: |
0272e1fd BF |
3550 | */ |
3551 | fl->fl_break_time = 0; | |
1da177e4 | 3552 | |
02e1215f | 3553 | spin_lock(&fp->fi_lock); |
417c6629 JL |
3554 | fp->fi_had_conflict = true; |
3555 | /* | |
4d01b7f5 JL |
3556 | * If there are no delegations on the list, then return true |
3557 | * so that the lease code will go ahead and delete it. | |
417c6629 JL |
3558 | */ |
3559 | if (list_empty(&fp->fi_delegations)) | |
4d01b7f5 | 3560 | ret = true; |
417c6629 JL |
3561 | else |
3562 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
3563 | nfsd_break_one_deleg(dp); | |
02e1215f | 3564 | spin_unlock(&fp->fi_lock); |
4d01b7f5 | 3565 | return ret; |
1da177e4 LT |
3566 | } |
3567 | ||
c45198ed | 3568 | static int |
7448cc37 JL |
3569 | nfsd_change_deleg_cb(struct file_lock *onlist, int arg, |
3570 | struct list_head *dispose) | |
1da177e4 LT |
3571 | { |
3572 | if (arg & F_UNLCK) | |
c45198ed | 3573 | return lease_modify(onlist, arg, dispose); |
1da177e4 LT |
3574 | else |
3575 | return -EAGAIN; | |
3576 | } | |
3577 | ||
7b021967 | 3578 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
3579 | .lm_break = nfsd_break_deleg_cb, |
3580 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
3581 | }; |
3582 | ||
7a8711c9 BF |
3583 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
3584 | { | |
3585 | if (nfsd4_has_session(cstate)) | |
3586 | return nfs_ok; | |
3587 | if (seqid == so->so_seqid - 1) | |
3588 | return nfserr_replay_me; | |
3589 | if (seqid == so->so_seqid) | |
3590 | return nfs_ok; | |
3591 | return nfserr_bad_seqid; | |
3592 | } | |
1da177e4 | 3593 | |
4b24ca7d JL |
3594 | static __be32 lookup_clientid(clientid_t *clid, |
3595 | struct nfsd4_compound_state *cstate, | |
3596 | struct nfsd_net *nn) | |
3597 | { | |
3598 | struct nfs4_client *found; | |
3599 | ||
3600 | if (cstate->clp) { | |
3601 | found = cstate->clp; | |
3602 | if (!same_clid(&found->cl_clientid, clid)) | |
3603 | return nfserr_stale_clientid; | |
3604 | return nfs_ok; | |
3605 | } | |
3606 | ||
3607 | if (STALE_CLIENTID(clid, nn)) | |
3608 | return nfserr_stale_clientid; | |
3609 | ||
3610 | /* | |
3611 | * For v4.1+ we get the client in the SEQUENCE op. If we don't have one | |
3612 | * cached already then we know this is for is for v4.0 and "sessions" | |
3613 | * will be false. | |
3614 | */ | |
3615 | WARN_ON_ONCE(cstate->session); | |
3e339f96 | 3616 | spin_lock(&nn->client_lock); |
4b24ca7d | 3617 | found = find_confirmed_client(clid, false, nn); |
3e339f96 TM |
3618 | if (!found) { |
3619 | spin_unlock(&nn->client_lock); | |
4b24ca7d | 3620 | return nfserr_expired; |
3e339f96 TM |
3621 | } |
3622 | atomic_inc(&found->cl_refcount); | |
3623 | spin_unlock(&nn->client_lock); | |
4b24ca7d JL |
3624 | |
3625 | /* Cache the nfs4_client in cstate! */ | |
3626 | cstate->clp = found; | |
4b24ca7d JL |
3627 | return nfs_ok; |
3628 | } | |
3629 | ||
b37ad28b | 3630 | __be32 |
6668958f | 3631 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
3320fef1 | 3632 | struct nfsd4_open *open, struct nfsd_net *nn) |
1da177e4 | 3633 | { |
1da177e4 LT |
3634 | clientid_t *clientid = &open->op_clientid; |
3635 | struct nfs4_client *clp = NULL; | |
3636 | unsigned int strhashval; | |
fe0750e5 | 3637 | struct nfs4_openowner *oo = NULL; |
4cdc951b | 3638 | __be32 status; |
1da177e4 | 3639 | |
2c142baa | 3640 | if (STALE_CLIENTID(&open->op_clientid, nn)) |
1da177e4 | 3641 | return nfserr_stale_clientid; |
32513b40 BF |
3642 | /* |
3643 | * In case we need it later, after we've already created the | |
3644 | * file and don't want to risk a further failure: | |
3645 | */ | |
3646 | open->op_file = nfsd4_alloc_file(); | |
3647 | if (open->op_file == NULL) | |
3648 | return nfserr_jukebox; | |
1da177e4 | 3649 | |
2d91e895 TM |
3650 | status = lookup_clientid(clientid, cstate, nn); |
3651 | if (status) | |
3652 | return status; | |
3653 | clp = cstate->clp; | |
3654 | ||
d4f0489f TM |
3655 | strhashval = ownerstr_hashval(&open->op_owner); |
3656 | oo = find_openstateowner_str(strhashval, open, clp); | |
fe0750e5 BF |
3657 | open->op_openowner = oo; |
3658 | if (!oo) { | |
bcf130f9 | 3659 | goto new_owner; |
1da177e4 | 3660 | } |
dad1c067 | 3661 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
0f442aa2 | 3662 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
3663 | release_openowner(oo); |
3664 | open->op_openowner = NULL; | |
bcf130f9 | 3665 | goto new_owner; |
0f442aa2 | 3666 | } |
4cdc951b BF |
3667 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
3668 | if (status) | |
3669 | return status; | |
4cdc951b | 3670 | goto alloc_stateid; |
bcf130f9 | 3671 | new_owner: |
13d6f66b | 3672 | oo = alloc_init_open_stateowner(strhashval, open, cstate); |
bcf130f9 BF |
3673 | if (oo == NULL) |
3674 | return nfserr_jukebox; | |
3675 | open->op_openowner = oo; | |
4cdc951b | 3676 | alloc_stateid: |
b49e084d | 3677 | open->op_stp = nfs4_alloc_open_stateid(clp); |
4cdc951b BF |
3678 | if (!open->op_stp) |
3679 | return nfserr_jukebox; | |
8287f009 SB |
3680 | |
3681 | if (nfsd4_has_session(cstate) && | |
3682 | (cstate->current_fh.fh_export->ex_flags & NFSEXP_PNFS)) { | |
3683 | open->op_odstate = alloc_clnt_odstate(clp); | |
3684 | if (!open->op_odstate) | |
3685 | return nfserr_jukebox; | |
3686 | } | |
3687 | ||
0f442aa2 | 3688 | return nfs_ok; |
1da177e4 LT |
3689 | } |
3690 | ||
b37ad28b | 3691 | static inline __be32 |
4a6e43e6 N |
3692 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
3693 | { | |
3694 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
3695 | return nfserr_openmode; | |
3696 | else | |
3697 | return nfs_ok; | |
3698 | } | |
3699 | ||
f459e453 | 3700 | static int share_access_to_flags(u32 share_access) |
52f4fb43 | 3701 | { |
f459e453 | 3702 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
52f4fb43 N |
3703 | } |
3704 | ||
38c2f4b1 | 3705 | static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) |
24a0111e | 3706 | { |
f459e453 | 3707 | struct nfs4_stid *ret; |
24a0111e | 3708 | |
38c2f4b1 | 3709 | ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); |
f459e453 BF |
3710 | if (!ret) |
3711 | return NULL; | |
3712 | return delegstateid(ret); | |
24a0111e BF |
3713 | } |
3714 | ||
8b289b2c BF |
3715 | static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) |
3716 | { | |
3717 | return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || | |
3718 | open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; | |
3719 | } | |
3720 | ||
b37ad28b | 3721 | static __be32 |
41d22663 | 3722 | nfs4_check_deleg(struct nfs4_client *cl, struct nfsd4_open *open, |
567d9829 N |
3723 | struct nfs4_delegation **dp) |
3724 | { | |
3725 | int flags; | |
b37ad28b | 3726 | __be32 status = nfserr_bad_stateid; |
dcd94cc2 | 3727 | struct nfs4_delegation *deleg; |
567d9829 | 3728 | |
dcd94cc2 TM |
3729 | deleg = find_deleg_stateid(cl, &open->op_delegate_stateid); |
3730 | if (deleg == NULL) | |
c44c5eeb | 3731 | goto out; |
24a0111e | 3732 | flags = share_access_to_flags(open->op_share_access); |
dcd94cc2 TM |
3733 | status = nfs4_check_delegmode(deleg, flags); |
3734 | if (status) { | |
3735 | nfs4_put_stid(&deleg->dl_stid); | |
3736 | goto out; | |
3737 | } | |
3738 | *dp = deleg; | |
c44c5eeb | 3739 | out: |
8b289b2c | 3740 | if (!nfsd4_is_deleg_cur(open)) |
c44c5eeb N |
3741 | return nfs_ok; |
3742 | if (status) | |
3743 | return status; | |
dad1c067 | 3744 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
c44c5eeb | 3745 | return nfs_ok; |
567d9829 N |
3746 | } |
3747 | ||
a46cb7f2 JL |
3748 | static struct nfs4_ol_stateid * |
3749 | nfsd4_find_existing_open(struct nfs4_file *fp, struct nfsd4_open *open) | |
1da177e4 | 3750 | { |
a46cb7f2 | 3751 | struct nfs4_ol_stateid *local, *ret = NULL; |
fe0750e5 | 3752 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 3753 | |
1d31a253 | 3754 | spin_lock(&fp->fi_lock); |
8beefa24 | 3755 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
3756 | /* ignore lock owners */ |
3757 | if (local->st_stateowner->so_is_open_owner == 0) | |
3758 | continue; | |
baeb4ff0 | 3759 | if (local->st_stateowner == &oo->oo_owner) { |
a46cb7f2 | 3760 | ret = local; |
d6f2bc5d | 3761 | atomic_inc(&ret->st_stid.sc_count); |
baeb4ff0 | 3762 | break; |
1d31a253 | 3763 | } |
1da177e4 | 3764 | } |
1d31a253 | 3765 | spin_unlock(&fp->fi_lock); |
a46cb7f2 | 3766 | return ret; |
1da177e4 LT |
3767 | } |
3768 | ||
21fb4016 BF |
3769 | static inline int nfs4_access_to_access(u32 nfs4_access) |
3770 | { | |
3771 | int flags = 0; | |
3772 | ||
3773 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
3774 | flags |= NFSD_MAY_READ; | |
3775 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
3776 | flags |= NFSD_MAY_WRITE; | |
3777 | return flags; | |
3778 | } | |
3779 | ||
7e6a72e5 CH |
3780 | static inline __be32 |
3781 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, | |
3782 | struct nfsd4_open *open) | |
3783 | { | |
3784 | struct iattr iattr = { | |
3785 | .ia_valid = ATTR_SIZE, | |
3786 | .ia_size = 0, | |
3787 | }; | |
3788 | if (!open->op_truncate) | |
3789 | return 0; | |
3790 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
3791 | return nfserr_inval; | |
3792 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); | |
3793 | } | |
3794 | ||
0c12eaff | 3795 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
6eb3a1d0 JL |
3796 | struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp, |
3797 | struct nfsd4_open *open) | |
f9d7562f | 3798 | { |
de18643d | 3799 | struct file *filp = NULL; |
f9d7562f | 3800 | __be32 status; |
0c12eaff CB |
3801 | int oflag = nfs4_access_to_omode(open->op_share_access); |
3802 | int access = nfs4_access_to_access(open->op_share_access); | |
baeb4ff0 | 3803 | unsigned char old_access_bmap, old_deny_bmap; |
0c12eaff | 3804 | |
de18643d | 3805 | spin_lock(&fp->fi_lock); |
baeb4ff0 JL |
3806 | |
3807 | /* | |
3808 | * Are we trying to set a deny mode that would conflict with | |
3809 | * current access? | |
3810 | */ | |
3811 | status = nfs4_file_check_deny(fp, open->op_share_deny); | |
3812 | if (status != nfs_ok) { | |
3813 | spin_unlock(&fp->fi_lock); | |
3814 | goto out; | |
3815 | } | |
3816 | ||
3817 | /* set access to the file */ | |
3818 | status = nfs4_file_get_access(fp, open->op_share_access); | |
3819 | if (status != nfs_ok) { | |
3820 | spin_unlock(&fp->fi_lock); | |
3821 | goto out; | |
3822 | } | |
3823 | ||
3824 | /* Set access bits in stateid */ | |
3825 | old_access_bmap = stp->st_access_bmap; | |
3826 | set_access(open->op_share_access, stp); | |
3827 | ||
3828 | /* Set new deny mask */ | |
3829 | old_deny_bmap = stp->st_deny_bmap; | |
3830 | set_deny(open->op_share_deny, stp); | |
3831 | fp->fi_share_deny |= (open->op_share_deny & NFS4_SHARE_DENY_BOTH); | |
3832 | ||
f9d7562f | 3833 | if (!fp->fi_fds[oflag]) { |
de18643d TM |
3834 | spin_unlock(&fp->fi_lock); |
3835 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, &filp); | |
f9d7562f | 3836 | if (status) |
baeb4ff0 | 3837 | goto out_put_access; |
de18643d TM |
3838 | spin_lock(&fp->fi_lock); |
3839 | if (!fp->fi_fds[oflag]) { | |
3840 | fp->fi_fds[oflag] = filp; | |
3841 | filp = NULL; | |
3842 | } | |
f9d7562f | 3843 | } |
de18643d TM |
3844 | spin_unlock(&fp->fi_lock); |
3845 | if (filp) | |
3846 | fput(filp); | |
f9d7562f | 3847 | |
7e6a72e5 CH |
3848 | status = nfsd4_truncate(rqstp, cur_fh, open); |
3849 | if (status) | |
3850 | goto out_put_access; | |
7e6a72e5 CH |
3851 | out: |
3852 | return status; | |
baeb4ff0 JL |
3853 | out_put_access: |
3854 | stp->st_access_bmap = old_access_bmap; | |
3855 | nfs4_file_put_access(fp, open->op_share_access); | |
3856 | reset_union_bmap_deny(bmap_to_share_mode(old_deny_bmap), stp); | |
3857 | goto out; | |
1da177e4 LT |
3858 | } |
3859 | ||
b37ad28b | 3860 | static __be32 |
dcef0413 | 3861 | 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 | 3862 | { |
b37ad28b | 3863 | __be32 status; |
6ac75368 | 3864 | unsigned char old_deny_bmap = stp->st_deny_bmap; |
1da177e4 | 3865 | |
6eb3a1d0 | 3866 | if (!test_access(open->op_share_access, stp)) |
baeb4ff0 | 3867 | return nfs4_get_vfs_file(rqstp, fp, cur_fh, stp, open); |
7e6a72e5 | 3868 | |
baeb4ff0 JL |
3869 | /* test and set deny mode */ |
3870 | spin_lock(&fp->fi_lock); | |
3871 | status = nfs4_file_check_deny(fp, open->op_share_deny); | |
3872 | if (status == nfs_ok) { | |
baeb4ff0 JL |
3873 | set_deny(open->op_share_deny, stp); |
3874 | fp->fi_share_deny |= | |
3875 | (open->op_share_deny & NFS4_SHARE_DENY_BOTH); | |
3876 | } | |
3877 | spin_unlock(&fp->fi_lock); | |
3878 | ||
3879 | if (status != nfs_ok) | |
1da177e4 | 3880 | return status; |
1da177e4 | 3881 | |
baeb4ff0 JL |
3882 | status = nfsd4_truncate(rqstp, cur_fh, open); |
3883 | if (status != nfs_ok) | |
3884 | reset_union_bmap_deny(old_deny_bmap, stp); | |
3885 | return status; | |
3886 | } | |
1da177e4 | 3887 | |
1da177e4 | 3888 | static void |
1255a8f3 | 3889 | nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session) |
1da177e4 | 3890 | { |
dad1c067 | 3891 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
1da177e4 LT |
3892 | } |
3893 | ||
14a24e99 BF |
3894 | /* Should we give out recallable state?: */ |
3895 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
3896 | { | |
3897 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
3898 | return true; | |
3899 | /* | |
3900 | * In the sessions case, since we don't have to establish a | |
3901 | * separate connection for callbacks, we assume it's OK | |
3902 | * until we hear otherwise: | |
3903 | */ | |
3904 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
3905 | } | |
3906 | ||
d564fbec | 3907 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_file *fp, int flag) |
22d38c4c BF |
3908 | { |
3909 | struct file_lock *fl; | |
3910 | ||
3911 | fl = locks_alloc_lock(); | |
3912 | if (!fl) | |
3913 | return NULL; | |
22d38c4c | 3914 | fl->fl_lmops = &nfsd_lease_mng_ops; |
617588d5 | 3915 | fl->fl_flags = FL_DELEG; |
22d38c4c BF |
3916 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; |
3917 | fl->fl_end = OFFSET_MAX; | |
d564fbec | 3918 | fl->fl_owner = (fl_owner_t)fp; |
22d38c4c | 3919 | fl->fl_pid = current->tgid; |
22d38c4c BF |
3920 | return fl; |
3921 | } | |
3922 | ||
99c41515 | 3923 | static int nfs4_setlease(struct nfs4_delegation *dp) |
edab9782 | 3924 | { |
11b9164a | 3925 | struct nfs4_file *fp = dp->dl_stid.sc_file; |
415b96c5 | 3926 | struct file_lock *fl, *ret; |
417c6629 JL |
3927 | struct file *filp; |
3928 | int status = 0; | |
edab9782 | 3929 | |
d564fbec | 3930 | fl = nfs4_alloc_init_lease(fp, NFS4_OPEN_DELEGATE_READ); |
edab9782 BF |
3931 | if (!fl) |
3932 | return -ENOMEM; | |
417c6629 JL |
3933 | filp = find_readable_file(fp); |
3934 | if (!filp) { | |
3935 | /* We should always have a readable file here */ | |
3936 | WARN_ON_ONCE(1); | |
3937 | return -EBADF; | |
3938 | } | |
3939 | fl->fl_file = filp; | |
415b96c5 | 3940 | ret = fl; |
e6f5c789 | 3941 | status = vfs_setlease(filp, fl->fl_type, &fl, NULL); |
1c7dd2ff | 3942 | if (fl) |
417c6629 | 3943 | locks_free_lock(fl); |
1c7dd2ff | 3944 | if (status) |
417c6629 | 3945 | goto out_fput; |
417c6629 JL |
3946 | spin_lock(&state_lock); |
3947 | spin_lock(&fp->fi_lock); | |
3948 | /* Did the lease get broken before we took the lock? */ | |
3949 | status = -EAGAIN; | |
3950 | if (fp->fi_had_conflict) | |
3951 | goto out_unlock; | |
3952 | /* Race breaker */ | |
0c637be8 | 3953 | if (fp->fi_deleg_file) { |
417c6629 | 3954 | status = 0; |
67db1034 | 3955 | ++fp->fi_delegees; |
417c6629 JL |
3956 | hash_delegation_locked(dp, fp); |
3957 | goto out_unlock; | |
3958 | } | |
417c6629 | 3959 | fp->fi_deleg_file = filp; |
67db1034 | 3960 | fp->fi_delegees = 1; |
931ee56c | 3961 | hash_delegation_locked(dp, fp); |
417c6629 | 3962 | spin_unlock(&fp->fi_lock); |
cdc97505 | 3963 | spin_unlock(&state_lock); |
acfdf5c3 | 3964 | return 0; |
417c6629 JL |
3965 | out_unlock: |
3966 | spin_unlock(&fp->fi_lock); | |
3967 | spin_unlock(&state_lock); | |
3968 | out_fput: | |
3969 | fput(filp); | |
e873088f | 3970 | return status; |
acfdf5c3 BF |
3971 | } |
3972 | ||
0b26693c JL |
3973 | static struct nfs4_delegation * |
3974 | nfs4_set_delegation(struct nfs4_client *clp, struct svc_fh *fh, | |
8287f009 | 3975 | struct nfs4_file *fp, struct nfs4_clnt_odstate *odstate) |
acfdf5c3 | 3976 | { |
0b26693c JL |
3977 | int status; |
3978 | struct nfs4_delegation *dp; | |
417c6629 | 3979 | |
bf7bd3e9 | 3980 | if (fp->fi_had_conflict) |
0b26693c JL |
3981 | return ERR_PTR(-EAGAIN); |
3982 | ||
8287f009 | 3983 | dp = alloc_init_deleg(clp, fh, odstate); |
0b26693c JL |
3984 | if (!dp) |
3985 | return ERR_PTR(-ENOMEM); | |
3986 | ||
bf7bd3e9 | 3987 | get_nfs4_file(fp); |
417c6629 JL |
3988 | spin_lock(&state_lock); |
3989 | spin_lock(&fp->fi_lock); | |
11b9164a | 3990 | dp->dl_stid.sc_file = fp; |
0c637be8 | 3991 | if (!fp->fi_deleg_file) { |
417c6629 JL |
3992 | spin_unlock(&fp->fi_lock); |
3993 | spin_unlock(&state_lock); | |
0b26693c JL |
3994 | status = nfs4_setlease(dp); |
3995 | goto out; | |
417c6629 | 3996 | } |
acfdf5c3 | 3997 | if (fp->fi_had_conflict) { |
417c6629 JL |
3998 | status = -EAGAIN; |
3999 | goto out_unlock; | |
acfdf5c3 | 4000 | } |
67db1034 | 4001 | ++fp->fi_delegees; |
931ee56c | 4002 | hash_delegation_locked(dp, fp); |
0b26693c | 4003 | status = 0; |
417c6629 JL |
4004 | out_unlock: |
4005 | spin_unlock(&fp->fi_lock); | |
cdc97505 | 4006 | spin_unlock(&state_lock); |
0b26693c JL |
4007 | out: |
4008 | if (status) { | |
8287f009 | 4009 | put_clnt_odstate(dp->dl_clnt_odstate); |
6011695d | 4010 | nfs4_put_stid(&dp->dl_stid); |
0b26693c JL |
4011 | return ERR_PTR(status); |
4012 | } | |
4013 | return dp; | |
edab9782 BF |
4014 | } |
4015 | ||
4aa8913c BH |
4016 | static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) |
4017 | { | |
4018 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
4019 | if (status == -EAGAIN) | |
4020 | open->op_why_no_deleg = WND4_CONTENTION; | |
4021 | else { | |
4022 | open->op_why_no_deleg = WND4_RESOURCE; | |
4023 | switch (open->op_deleg_want) { | |
4024 | case NFS4_SHARE_WANT_READ_DELEG: | |
4025 | case NFS4_SHARE_WANT_WRITE_DELEG: | |
4026 | case NFS4_SHARE_WANT_ANY_DELEG: | |
4027 | break; | |
4028 | case NFS4_SHARE_WANT_CANCEL: | |
4029 | open->op_why_no_deleg = WND4_CANCELLED; | |
4030 | break; | |
4031 | case NFS4_SHARE_WANT_NO_DELEG: | |
063b0fb9 | 4032 | WARN_ON_ONCE(1); |
4aa8913c BH |
4033 | } |
4034 | } | |
4035 | } | |
4036 | ||
1da177e4 LT |
4037 | /* |
4038 | * Attempt to hand out a delegation. | |
99c41515 BF |
4039 | * |
4040 | * Note we don't support write delegations, and won't until the vfs has | |
4041 | * proper support for them. | |
1da177e4 LT |
4042 | */ |
4043 | static void | |
4cf59221 JL |
4044 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, |
4045 | struct nfs4_ol_stateid *stp) | |
1da177e4 LT |
4046 | { |
4047 | struct nfs4_delegation *dp; | |
4cf59221 JL |
4048 | struct nfs4_openowner *oo = openowner(stp->st_stateowner); |
4049 | struct nfs4_client *clp = stp->st_stid.sc_client; | |
14a24e99 | 4050 | int cb_up; |
99c41515 | 4051 | int status = 0; |
1da177e4 | 4052 | |
fe0750e5 | 4053 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
7b190fec N |
4054 | open->op_recall = 0; |
4055 | switch (open->op_claim_type) { | |
4056 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 4057 | if (!cb_up) |
7b190fec | 4058 | open->op_recall = 1; |
99c41515 BF |
4059 | if (open->op_delegate_type != NFS4_OPEN_DELEGATE_READ) |
4060 | goto out_no_deleg; | |
7b190fec N |
4061 | break; |
4062 | case NFS4_OPEN_CLAIM_NULL: | |
ed47b062 | 4063 | case NFS4_OPEN_CLAIM_FH: |
99c41515 BF |
4064 | /* |
4065 | * Let's not give out any delegations till everyone's | |
4066 | * had the chance to reclaim theirs.... | |
4067 | */ | |
4cf59221 | 4068 | if (locks_in_grace(clp->net)) |
99c41515 | 4069 | goto out_no_deleg; |
dad1c067 | 4070 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
99c41515 | 4071 | goto out_no_deleg; |
9a0590ae SD |
4072 | /* |
4073 | * Also, if the file was opened for write or | |
4074 | * create, there's a good chance the client's | |
4075 | * about to write to it, resulting in an | |
4076 | * immediate recall (since we don't support | |
4077 | * write delegations): | |
4078 | */ | |
7b190fec | 4079 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
99c41515 BF |
4080 | goto out_no_deleg; |
4081 | if (open->op_create == NFS4_OPEN_CREATE) | |
4082 | goto out_no_deleg; | |
7b190fec N |
4083 | break; |
4084 | default: | |
99c41515 | 4085 | goto out_no_deleg; |
7b190fec | 4086 | } |
8287f009 | 4087 | dp = nfs4_set_delegation(clp, fh, stp->st_stid.sc_file, stp->st_clnt_odstate); |
0b26693c | 4088 | if (IS_ERR(dp)) |
dd239cc0 | 4089 | goto out_no_deleg; |
1da177e4 | 4090 | |
d5477a8d | 4091 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 4092 | |
8c10cbdb | 4093 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
d5477a8d | 4094 | STATEID_VAL(&dp->dl_stid.sc_stateid)); |
99c41515 | 4095 | open->op_delegate_type = NFS4_OPEN_DELEGATE_READ; |
67cb1279 | 4096 | nfs4_put_stid(&dp->dl_stid); |
dd239cc0 | 4097 | return; |
dd239cc0 | 4098 | out_no_deleg: |
99c41515 BF |
4099 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE; |
4100 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && | |
d08d32e6 | 4101 | open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) { |
99c41515 | 4102 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
d08d32e6 BF |
4103 | open->op_recall = 1; |
4104 | } | |
99c41515 BF |
4105 | |
4106 | /* 4.1 client asking for a delegation? */ | |
4107 | if (open->op_deleg_want) | |
4108 | nfsd4_open_deleg_none_ext(open, status); | |
4109 | return; | |
1da177e4 LT |
4110 | } |
4111 | ||
e27f49c3 BH |
4112 | static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, |
4113 | struct nfs4_delegation *dp) | |
4114 | { | |
4115 | if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && | |
4116 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
4117 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
4118 | open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; | |
4119 | } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && | |
4120 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
4121 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
4122 | open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; | |
4123 | } | |
4124 | /* Otherwise the client must be confused wanting a delegation | |
4125 | * it already has, therefore we don't return | |
4126 | * NFS4_OPEN_DELEGATE_NONE_EXT and reason. | |
4127 | */ | |
4128 | } | |
4129 | ||
b37ad28b | 4130 | __be32 |
1da177e4 LT |
4131 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
4132 | { | |
6668958f | 4133 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
38c2f4b1 | 4134 | struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; |
1da177e4 | 4135 | struct nfs4_file *fp = NULL; |
dcef0413 | 4136 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 4137 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 4138 | __be32 status; |
1da177e4 | 4139 | |
1da177e4 LT |
4140 | /* |
4141 | * Lookup file; if found, lookup stateid and check open request, | |
4142 | * and check for delegations in the process of being recalled. | |
4143 | * If not found, create the nfs4_file struct | |
4144 | */ | |
f9c00c3a | 4145 | fp = find_or_add_file(open->op_file, ¤t_fh->fh_handle); |
950e0118 | 4146 | if (fp != open->op_file) { |
41d22663 | 4147 | status = nfs4_check_deleg(cl, open, &dp); |
c44c5eeb N |
4148 | if (status) |
4149 | goto out; | |
a46cb7f2 | 4150 | stp = nfsd4_find_existing_open(fp, open); |
1da177e4 | 4151 | } else { |
950e0118 | 4152 | open->op_file = NULL; |
c44c5eeb | 4153 | status = nfserr_bad_stateid; |
8b289b2c | 4154 | if (nfsd4_is_deleg_cur(open)) |
c44c5eeb | 4155 | goto out; |
1da177e4 LT |
4156 | } |
4157 | ||
4158 | /* | |
4159 | * OPEN the file, or upgrade an existing OPEN. | |
4160 | * If truncate fails, the OPEN fails. | |
4161 | */ | |
4162 | if (stp) { | |
4163 | /* Stateid was found, this is an OPEN upgrade */ | |
f9d7562f | 4164 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
1da177e4 LT |
4165 | if (status) |
4166 | goto out; | |
4167 | } else { | |
4cdc951b BF |
4168 | stp = open->op_stp; |
4169 | open->op_stp = NULL; | |
996e0938 | 4170 | init_open_stateid(stp, fp, open); |
6eb3a1d0 JL |
4171 | status = nfs4_get_vfs_file(rqstp, fp, current_fh, stp, open); |
4172 | if (status) { | |
4173 | release_open_stateid(stp); | |
4174 | goto out; | |
4175 | } | |
8287f009 SB |
4176 | |
4177 | stp->st_clnt_odstate = find_or_hash_clnt_odstate(fp, | |
4178 | open->op_odstate); | |
4179 | if (stp->st_clnt_odstate == open->op_odstate) | |
4180 | open->op_odstate = NULL; | |
1da177e4 | 4181 | } |
dcef0413 BF |
4182 | update_stateid(&stp->st_stid.sc_stateid); |
4183 | memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 4184 | |
d24433cd | 4185 | if (nfsd4_has_session(&resp->cstate)) { |
d24433cd BH |
4186 | if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { |
4187 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
4188 | open->op_why_no_deleg = WND4_NOT_WANTED; | |
4189 | goto nodeleg; | |
4190 | } | |
4191 | } | |
4192 | ||
1da177e4 LT |
4193 | /* |
4194 | * Attempt to hand out a delegation. No error return, because the | |
4195 | * OPEN succeeds even if we fail. | |
4196 | */ | |
4cf59221 | 4197 | nfs4_open_delegation(current_fh, open, stp); |
d24433cd | 4198 | nodeleg: |
1da177e4 LT |
4199 | status = nfs_ok; |
4200 | ||
8c10cbdb | 4201 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
dcef0413 | 4202 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
1da177e4 | 4203 | out: |
d24433cd BH |
4204 | /* 4.1 client trying to upgrade/downgrade delegation? */ |
4205 | if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && | |
e27f49c3 BH |
4206 | open->op_deleg_want) |
4207 | nfsd4_deleg_xgrade_none_ext(open, dp); | |
d24433cd | 4208 | |
13cd2184 N |
4209 | if (fp) |
4210 | put_nfs4_file(fp); | |
37515177 | 4211 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
1255a8f3 | 4212 | nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate)); |
1da177e4 LT |
4213 | /* |
4214 | * To finish the open response, we just need to set the rflags. | |
4215 | */ | |
4216 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
dad1c067 | 4217 | if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && |
6668958f | 4218 | !nfsd4_has_session(&resp->cstate)) |
1da177e4 | 4219 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
dcd94cc2 TM |
4220 | if (dp) |
4221 | nfs4_put_stid(&dp->dl_stid); | |
d6f2bc5d TM |
4222 | if (stp) |
4223 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 LT |
4224 | |
4225 | return status; | |
4226 | } | |
4227 | ||
58fb12e6 | 4228 | void nfsd4_cleanup_open_state(struct nfsd4_compound_state *cstate, |
42297899 | 4229 | struct nfsd4_open *open) |
d29b20cd BF |
4230 | { |
4231 | if (open->op_openowner) { | |
d3134b10 JL |
4232 | struct nfs4_stateowner *so = &open->op_openowner->oo_owner; |
4233 | ||
4234 | nfsd4_cstate_assign_replay(cstate, so); | |
4235 | nfs4_put_stateowner(so); | |
d29b20cd | 4236 | } |
32513b40 | 4237 | if (open->op_file) |
5b095e99 | 4238 | kmem_cache_free(file_slab, open->op_file); |
4cdc951b | 4239 | if (open->op_stp) |
6011695d | 4240 | nfs4_put_stid(&open->op_stp->st_stid); |
8287f009 SB |
4241 | if (open->op_odstate) |
4242 | kmem_cache_free(odstate_slab, open->op_odstate); | |
d29b20cd BF |
4243 | } |
4244 | ||
b37ad28b | 4245 | __be32 |
b591480b BF |
4246 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4247 | clientid_t *clid) | |
1da177e4 LT |
4248 | { |
4249 | struct nfs4_client *clp; | |
b37ad28b | 4250 | __be32 status; |
7f2210fa | 4251 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4252 | |
1da177e4 LT |
4253 | dprintk("process_renew(%08x/%08x): starting\n", |
4254 | clid->cl_boot, clid->cl_id); | |
4b24ca7d | 4255 | status = lookup_clientid(clid, cstate, nn); |
9b2ef62b | 4256 | if (status) |
1da177e4 | 4257 | goto out; |
4b24ca7d | 4258 | clp = cstate->clp; |
1da177e4 | 4259 | status = nfserr_cb_path_down; |
ea1da636 | 4260 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 4261 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
4262 | goto out; |
4263 | status = nfs_ok; | |
4264 | out: | |
1da177e4 LT |
4265 | return status; |
4266 | } | |
4267 | ||
7f5ef2e9 | 4268 | void |
12760c66 | 4269 | nfsd4_end_grace(struct nfsd_net *nn) |
a76b4319 | 4270 | { |
33dcc481 | 4271 | /* do nothing if grace period already ended */ |
a51c84ed | 4272 | if (nn->grace_ended) |
33dcc481 JL |
4273 | return; |
4274 | ||
a76b4319 | 4275 | dprintk("NFSD: end of grace period\n"); |
a51c84ed | 4276 | nn->grace_ended = true; |
70b28235 BF |
4277 | /* |
4278 | * If the server goes down again right now, an NFSv4 | |
4279 | * client will still be allowed to reclaim after it comes back up, | |
4280 | * even if it hasn't yet had a chance to reclaim state this time. | |
4281 | * | |
4282 | */ | |
919b8049 | 4283 | nfsd4_record_grace_done(nn); |
70b28235 BF |
4284 | /* |
4285 | * At this point, NFSv4 clients can still reclaim. But if the | |
4286 | * server crashes, any that have not yet reclaimed will be out | |
4287 | * of luck on the next boot. | |
4288 | * | |
4289 | * (NFSv4.1+ clients are considered to have reclaimed once they | |
4290 | * call RECLAIM_COMPLETE. NFSv4.0 clients are considered to | |
4291 | * have reclaimed after their first OPEN.) | |
4292 | */ | |
5e1533c7 | 4293 | locks_end_grace(&nn->nfsd4_manager); |
70b28235 BF |
4294 | /* |
4295 | * At this point, and once lockd and/or any other containers | |
4296 | * exit their grace period, further reclaims will fail and | |
4297 | * regular locking can resume. | |
4298 | */ | |
a76b4319 N |
4299 | } |
4300 | ||
fd39ca9a | 4301 | static time_t |
09121281 | 4302 | nfs4_laundromat(struct nfsd_net *nn) |
1da177e4 LT |
4303 | { |
4304 | struct nfs4_client *clp; | |
fe0750e5 | 4305 | struct nfs4_openowner *oo; |
1da177e4 | 4306 | struct nfs4_delegation *dp; |
217526e7 | 4307 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4308 | struct list_head *pos, *next, reaplist; |
3d733711 | 4309 | time_t cutoff = get_seconds() - nn->nfsd4_lease; |
a832e7ae | 4310 | time_t t, new_timeo = nn->nfsd4_lease; |
1da177e4 | 4311 | |
1da177e4 | 4312 | dprintk("NFSD: laundromat service - starting\n"); |
12760c66 | 4313 | nfsd4_end_grace(nn); |
36acb66b | 4314 | INIT_LIST_HEAD(&reaplist); |
c9a49628 | 4315 | spin_lock(&nn->client_lock); |
5ed58bb2 | 4316 | list_for_each_safe(pos, next, &nn->client_lru) { |
1da177e4 LT |
4317 | clp = list_entry(pos, struct nfs4_client, cl_lru); |
4318 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
4319 | t = clp->cl_time - cutoff; | |
a832e7ae | 4320 | new_timeo = min(new_timeo, t); |
1da177e4 LT |
4321 | break; |
4322 | } | |
221a6876 | 4323 | if (mark_client_expired_locked(clp)) { |
d7682988 BH |
4324 | dprintk("NFSD: client in use (clientid %08x)\n", |
4325 | clp->cl_clientid.cl_id); | |
4326 | continue; | |
4327 | } | |
4864af97 | 4328 | list_add(&clp->cl_lru, &reaplist); |
36acb66b | 4329 | } |
c9a49628 | 4330 | spin_unlock(&nn->client_lock); |
36acb66b BH |
4331 | list_for_each_safe(pos, next, &reaplist) { |
4332 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
4333 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
4334 | clp->cl_clientid.cl_id); | |
4864af97 | 4335 | list_del_init(&clp->cl_lru); |
1da177e4 LT |
4336 | expire_client(clp); |
4337 | } | |
cdc97505 | 4338 | spin_lock(&state_lock); |
e8c69d17 | 4339 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 | 4340 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
4e37a7c2 SK |
4341 | if (net_generic(dp->dl_stid.sc_client->net, nfsd_net_id) != nn) |
4342 | continue; | |
1da177e4 | 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 | ||
f7a4d872 | 4399 | static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) |
1da177e4 | 4400 | { |
4d94c2ef | 4401 | if (!fh_match(&fhp->fh_handle, &stp->st_stid.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 | ||
4604 | status = nfs4_check_fh(fhp, ols); | |
4605 | if (status) | |
4606 | return status; | |
4607 | status = nfsd4_check_openowner_confirmed(ols); | |
4608 | if (status) | |
4609 | return status; | |
4610 | return nfs4_check_openmode(ols, flags); | |
4611 | } | |
4612 | ||
af90f707 CH |
4613 | static __be32 |
4614 | nfs4_check_file(struct svc_rqst *rqstp, struct svc_fh *fhp, struct nfs4_stid *s, | |
4615 | struct file **filpp, bool *tmp_file, int flags) | |
4616 | { | |
4617 | int acc = (flags & RD_STATE) ? NFSD_MAY_READ : NFSD_MAY_WRITE; | |
4618 | struct file *file; | |
4619 | __be32 status; | |
4620 | ||
4621 | file = nfs4_find_file(s, flags); | |
4622 | if (file) { | |
4623 | status = nfsd_permission(rqstp, fhp->fh_export, fhp->fh_dentry, | |
4624 | acc | NFSD_MAY_OWNER_OVERRIDE); | |
4625 | if (status) { | |
4626 | fput(file); | |
4627 | return status; | |
4628 | } | |
4629 | ||
4630 | *filpp = file; | |
4631 | } else { | |
4632 | status = nfsd_open(rqstp, fhp, S_IFREG, acc, filpp); | |
4633 | if (status) | |
4634 | return status; | |
4635 | ||
4636 | if (tmp_file) | |
4637 | *tmp_file = true; | |
4638 | } | |
4639 | ||
4640 | return 0; | |
4641 | } | |
4642 | ||
1da177e4 | 4643 | /* |
a0649b2d CH |
4644 | * Checks for stateid operations |
4645 | */ | |
b37ad28b | 4646 | __be32 |
af90f707 CH |
4647 | nfs4_preprocess_stateid_op(struct svc_rqst *rqstp, |
4648 | struct nfsd4_compound_state *cstate, stateid_t *stateid, | |
4649 | int flags, struct file **filpp, bool *tmp_file) | |
1da177e4 | 4650 | { |
a0649b2d CH |
4651 | struct svc_fh *fhp = &cstate->current_fh; |
4652 | struct inode *ino = d_inode(fhp->fh_dentry); | |
af90f707 | 4653 | struct net *net = SVC_NET(rqstp); |
3320fef1 | 4654 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
af90f707 | 4655 | struct nfs4_stid *s = NULL; |
b37ad28b | 4656 | __be32 status; |
1da177e4 | 4657 | |
1da177e4 LT |
4658 | if (filpp) |
4659 | *filpp = NULL; | |
af90f707 CH |
4660 | if (tmp_file) |
4661 | *tmp_file = false; | |
1da177e4 | 4662 | |
5ccb0066 | 4663 | if (grace_disallows_io(net, ino)) |
1da177e4 LT |
4664 | return nfserr_grace; |
4665 | ||
af90f707 CH |
4666 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { |
4667 | status = check_special_stateids(net, fhp, stateid, flags); | |
4668 | goto done; | |
4669 | } | |
1da177e4 | 4670 | |
2dd6e458 | 4671 | status = nfsd4_lookup_stateid(cstate, stateid, |
db24b3b4 | 4672 | NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, |
2dd6e458 | 4673 | &s, nn); |
38c2f4b1 | 4674 | if (status) |
c2d1d6a8 | 4675 | return status; |
a0649b2d CH |
4676 | status = check_stateid_generation(stateid, &s->sc_stateid, |
4677 | nfsd4_has_session(cstate)); | |
69064a27 BF |
4678 | if (status) |
4679 | goto out; | |
a0649b2d | 4680 | |
f7a4d872 BF |
4681 | switch (s->sc_type) { |
4682 | case NFS4_DELEG_STID: | |
a0649b2d | 4683 | status = nfs4_check_delegmode(delegstateid(s), flags); |
f7a4d872 BF |
4684 | break; |
4685 | case NFS4_OPEN_STID: | |
4686 | case NFS4_LOCK_STID: | |
a0649b2d | 4687 | status = nfs4_check_olstateid(fhp, openlockstateid(s), flags); |
f7a4d872 BF |
4688 | break; |
4689 | default: | |
14bcab1a | 4690 | status = nfserr_bad_stateid; |
a0649b2d CH |
4691 | break; |
4692 | } | |
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; | |
4801 | return nfs4_check_fh(current_fh, stp); | |
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 | ||
5048 | ||
1da177e4 | 5049 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) |
1da177e4 | 5050 | |
87df4de8 BH |
5051 | static inline u64 |
5052 | end_offset(u64 start, u64 len) | |
5053 | { | |
5054 | u64 end; | |
5055 | ||
5056 | end = start + len; | |
5057 | return end >= start ? end: NFS4_MAX_UINT64; | |
5058 | } | |
5059 | ||
5060 | /* last octet in a range */ | |
5061 | static inline u64 | |
5062 | last_byte_offset(u64 start, u64 len) | |
5063 | { | |
5064 | u64 end; | |
5065 | ||
063b0fb9 | 5066 | WARN_ON_ONCE(!len); |
87df4de8 BH |
5067 | end = start + len; |
5068 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
5069 | } | |
5070 | ||
1da177e4 LT |
5071 | /* |
5072 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
5073 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
5074 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
5075 | * locking, this prevents us from being completely protocol-compliant. The | |
5076 | * real solution to this problem is to start using unsigned file offsets in | |
5077 | * the VFS, but this is a very deep change! | |
5078 | */ | |
5079 | static inline void | |
5080 | nfs4_transform_lock_offset(struct file_lock *lock) | |
5081 | { | |
5082 | if (lock->fl_start < 0) | |
5083 | lock->fl_start = OFFSET_MAX; | |
5084 | if (lock->fl_end < 0) | |
5085 | lock->fl_end = OFFSET_MAX; | |
5086 | } | |
5087 | ||
cae80b30 JL |
5088 | static fl_owner_t |
5089 | nfsd4_fl_get_owner(fl_owner_t owner) | |
aef9583b | 5090 | { |
cae80b30 JL |
5091 | struct nfs4_lockowner *lo = (struct nfs4_lockowner *)owner; |
5092 | ||
5093 | nfs4_get_stateowner(&lo->lo_owner); | |
5094 | return owner; | |
aef9583b KM |
5095 | } |
5096 | ||
cae80b30 JL |
5097 | static void |
5098 | nfsd4_fl_put_owner(fl_owner_t owner) | |
aef9583b | 5099 | { |
cae80b30 | 5100 | struct nfs4_lockowner *lo = (struct nfs4_lockowner *)owner; |
aef9583b | 5101 | |
cae80b30 | 5102 | if (lo) |
aef9583b | 5103 | nfs4_put_stateowner(&lo->lo_owner); |
aef9583b KM |
5104 | } |
5105 | ||
7b021967 | 5106 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
aef9583b KM |
5107 | .lm_get_owner = nfsd4_fl_get_owner, |
5108 | .lm_put_owner = nfsd4_fl_put_owner, | |
d5b9026a | 5109 | }; |
1da177e4 LT |
5110 | |
5111 | static inline void | |
5112 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
5113 | { | |
fe0750e5 | 5114 | struct nfs4_lockowner *lo; |
1da177e4 | 5115 | |
d5b9026a | 5116 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 BF |
5117 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
5118 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, | |
5119 | lo->lo_owner.so_owner.len, GFP_KERNEL); | |
7c13f344 BF |
5120 | if (!deny->ld_owner.data) |
5121 | /* We just don't care that much */ | |
5122 | goto nevermind; | |
fe0750e5 BF |
5123 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
5124 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; | |
d5b9026a | 5125 | } else { |
7c13f344 BF |
5126 | nevermind: |
5127 | deny->ld_owner.len = 0; | |
5128 | deny->ld_owner.data = NULL; | |
d5b9026a N |
5129 | deny->ld_clientid.cl_boot = 0; |
5130 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
5131 | } |
5132 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
5133 | deny->ld_length = NFS4_MAX_UINT64; |
5134 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
5135 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
5136 | deny->ld_type = NFS4_READ_LT; | |
5137 | if (fl->fl_type != F_RDLCK) | |
5138 | deny->ld_type = NFS4_WRITE_LT; | |
5139 | } | |
5140 | ||
fe0750e5 | 5141 | static struct nfs4_lockowner * |
c58c6610 | 5142 | find_lockowner_str_locked(clientid_t *clid, struct xdr_netobj *owner, |
d4f0489f | 5143 | struct nfs4_client *clp) |
1da177e4 | 5144 | { |
d4f0489f | 5145 | unsigned int strhashval = ownerstr_hashval(owner); |
b3c32bcd | 5146 | struct nfs4_stateowner *so; |
1da177e4 | 5147 | |
0a880a28 TM |
5148 | lockdep_assert_held(&clp->cl_lock); |
5149 | ||
d4f0489f TM |
5150 | list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[strhashval], |
5151 | so_strhash) { | |
b3c32bcd TM |
5152 | if (so->so_is_open_owner) |
5153 | continue; | |
b5971afa KM |
5154 | if (same_owner_str(so, owner)) |
5155 | return lockowner(nfs4_get_stateowner(so)); | |
1da177e4 LT |
5156 | } |
5157 | return NULL; | |
5158 | } | |
5159 | ||
c58c6610 TM |
5160 | static struct nfs4_lockowner * |
5161 | find_lockowner_str(clientid_t *clid, struct xdr_netobj *owner, | |
d4f0489f | 5162 | struct nfs4_client *clp) |
c58c6610 TM |
5163 | { |
5164 | struct nfs4_lockowner *lo; | |
5165 | ||
d4f0489f TM |
5166 | spin_lock(&clp->cl_lock); |
5167 | lo = find_lockowner_str_locked(clid, owner, clp); | |
5168 | spin_unlock(&clp->cl_lock); | |
c58c6610 TM |
5169 | return lo; |
5170 | } | |
5171 | ||
8f4b54c5 JL |
5172 | static void nfs4_unhash_lockowner(struct nfs4_stateowner *sop) |
5173 | { | |
c58c6610 | 5174 | unhash_lockowner_locked(lockowner(sop)); |
8f4b54c5 JL |
5175 | } |
5176 | ||
6b180f0b JL |
5177 | static void nfs4_free_lockowner(struct nfs4_stateowner *sop) |
5178 | { | |
5179 | struct nfs4_lockowner *lo = lockowner(sop); | |
5180 | ||
5181 | kmem_cache_free(lockowner_slab, lo); | |
5182 | } | |
5183 | ||
5184 | static const struct nfs4_stateowner_operations lockowner_ops = { | |
8f4b54c5 JL |
5185 | .so_unhash = nfs4_unhash_lockowner, |
5186 | .so_free = nfs4_free_lockowner, | |
6b180f0b JL |
5187 | }; |
5188 | ||
1da177e4 LT |
5189 | /* |
5190 | * Alloc a lock owner structure. | |
5191 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 5192 | * occurred. |
1da177e4 | 5193 | * |
16bfdaaf | 5194 | * strhashval = ownerstr_hashval |
1da177e4 | 5195 | */ |
fe0750e5 | 5196 | static struct nfs4_lockowner * |
c58c6610 TM |
5197 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, |
5198 | struct nfs4_ol_stateid *open_stp, | |
5199 | struct nfsd4_lock *lock) | |
5200 | { | |
c58c6610 | 5201 | struct nfs4_lockowner *lo, *ret; |
1da177e4 | 5202 | |
fe0750e5 BF |
5203 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
5204 | if (!lo) | |
1da177e4 | 5205 | return NULL; |
fe0750e5 BF |
5206 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
5207 | lo->lo_owner.so_is_open_owner = 0; | |
5db1c03f | 5208 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid; |
6b180f0b | 5209 | lo->lo_owner.so_ops = &lockowner_ops; |
d4f0489f | 5210 | spin_lock(&clp->cl_lock); |
c58c6610 | 5211 | ret = find_lockowner_str_locked(&clp->cl_clientid, |
d4f0489f | 5212 | &lock->lk_new_owner, clp); |
c58c6610 TM |
5213 | if (ret == NULL) { |
5214 | list_add(&lo->lo_owner.so_strhash, | |
d4f0489f | 5215 | &clp->cl_ownerstr_hashtbl[strhashval]); |
c58c6610 TM |
5216 | ret = lo; |
5217 | } else | |
5218 | nfs4_free_lockowner(&lo->lo_owner); | |
d4f0489f | 5219 | spin_unlock(&clp->cl_lock); |
340f0ba1 | 5220 | return ret; |
1da177e4 LT |
5221 | } |
5222 | ||
356a95ec JL |
5223 | static void |
5224 | init_lock_stateid(struct nfs4_ol_stateid *stp, struct nfs4_lockowner *lo, | |
5225 | struct nfs4_file *fp, struct inode *inode, | |
5226 | struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 5227 | { |
d3b313a4 | 5228 | struct nfs4_client *clp = lo->lo_owner.so_client; |
1da177e4 | 5229 | |
356a95ec JL |
5230 | lockdep_assert_held(&clp->cl_lock); |
5231 | ||
3d0fabd5 | 5232 | atomic_inc(&stp->st_stid.sc_count); |
3abdb607 | 5233 | stp->st_stid.sc_type = NFS4_LOCK_STID; |
b5971afa | 5234 | stp->st_stateowner = nfs4_get_stateowner(&lo->lo_owner); |
13cd2184 | 5235 | get_nfs4_file(fp); |
11b9164a | 5236 | stp->st_stid.sc_file = fp; |
b49e084d | 5237 | stp->st_stid.sc_free = nfs4_free_lock_stateid; |
0997b173 | 5238 | stp->st_access_bmap = 0; |
1da177e4 | 5239 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 5240 | stp->st_openstp = open_stp; |
3c87b9b7 | 5241 | list_add(&stp->st_locks, &open_stp->st_locks); |
1c755dc1 | 5242 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
1d31a253 TM |
5243 | spin_lock(&fp->fi_lock); |
5244 | list_add(&stp->st_perfile, &fp->fi_stateids); | |
5245 | spin_unlock(&fp->fi_lock); | |
1da177e4 LT |
5246 | } |
5247 | ||
c53530da JL |
5248 | static struct nfs4_ol_stateid * |
5249 | find_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp) | |
5250 | { | |
5251 | struct nfs4_ol_stateid *lst; | |
356a95ec JL |
5252 | struct nfs4_client *clp = lo->lo_owner.so_client; |
5253 | ||
5254 | lockdep_assert_held(&clp->cl_lock); | |
c53530da JL |
5255 | |
5256 | list_for_each_entry(lst, &lo->lo_owner.so_stateids, st_perstateowner) { | |
3d0fabd5 TM |
5257 | if (lst->st_stid.sc_file == fp) { |
5258 | atomic_inc(&lst->st_stid.sc_count); | |
c53530da | 5259 | return lst; |
3d0fabd5 | 5260 | } |
c53530da JL |
5261 | } |
5262 | return NULL; | |
5263 | } | |
5264 | ||
356a95ec JL |
5265 | static struct nfs4_ol_stateid * |
5266 | find_or_create_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fi, | |
5267 | struct inode *inode, struct nfs4_ol_stateid *ost, | |
5268 | bool *new) | |
5269 | { | |
5270 | struct nfs4_stid *ns = NULL; | |
5271 | struct nfs4_ol_stateid *lst; | |
5272 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); | |
5273 | struct nfs4_client *clp = oo->oo_owner.so_client; | |
5274 | ||
5275 | spin_lock(&clp->cl_lock); | |
5276 | lst = find_lock_stateid(lo, fi); | |
5277 | if (lst == NULL) { | |
5278 | spin_unlock(&clp->cl_lock); | |
5279 | ns = nfs4_alloc_stid(clp, stateid_slab); | |
5280 | if (ns == NULL) | |
5281 | return NULL; | |
5282 | ||
5283 | spin_lock(&clp->cl_lock); | |
5284 | lst = find_lock_stateid(lo, fi); | |
5285 | if (likely(!lst)) { | |
5286 | lst = openlockstateid(ns); | |
5287 | init_lock_stateid(lst, lo, fi, inode, ost); | |
5288 | ns = NULL; | |
5289 | *new = true; | |
5290 | } | |
5291 | } | |
5292 | spin_unlock(&clp->cl_lock); | |
5293 | if (ns) | |
5294 | nfs4_put_stid(ns); | |
5295 | return lst; | |
5296 | } | |
c53530da | 5297 | |
fd39ca9a | 5298 | static int |
1da177e4 LT |
5299 | check_lock_length(u64 offset, u64 length) |
5300 | { | |
87df4de8 | 5301 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
5302 | LOFF_OVERFLOW(offset, length))); |
5303 | } | |
5304 | ||
dcef0413 | 5305 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 | 5306 | { |
11b9164a | 5307 | struct nfs4_file *fp = lock_stp->st_stid.sc_file; |
0997b173 | 5308 | |
7214e860 JL |
5309 | lockdep_assert_held(&fp->fi_lock); |
5310 | ||
82c5ff1b | 5311 | if (test_access(access, lock_stp)) |
0997b173 | 5312 | return; |
12659651 | 5313 | __nfs4_file_get_access(fp, access); |
82c5ff1b | 5314 | set_access(access, lock_stp); |
0997b173 BF |
5315 | } |
5316 | ||
356a95ec JL |
5317 | static __be32 |
5318 | lookup_or_create_lock_state(struct nfsd4_compound_state *cstate, | |
5319 | struct nfs4_ol_stateid *ost, | |
5320 | struct nfsd4_lock *lock, | |
5321 | struct nfs4_ol_stateid **lst, bool *new) | |
64a284d0 | 5322 | { |
5db1c03f | 5323 | __be32 status; |
11b9164a | 5324 | struct nfs4_file *fi = ost->st_stid.sc_file; |
64a284d0 BF |
5325 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); |
5326 | struct nfs4_client *cl = oo->oo_owner.so_client; | |
2b0143b5 | 5327 | struct inode *inode = d_inode(cstate->current_fh.fh_dentry); |
64a284d0 BF |
5328 | struct nfs4_lockowner *lo; |
5329 | unsigned int strhashval; | |
5330 | ||
d4f0489f | 5331 | lo = find_lockowner_str(&cl->cl_clientid, &lock->v.new.owner, cl); |
c53530da | 5332 | if (!lo) { |
d4f0489f | 5333 | strhashval = ownerstr_hashval(&lock->v.new.owner); |
c53530da JL |
5334 | lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); |
5335 | if (lo == NULL) | |
5336 | return nfserr_jukebox; | |
5337 | } else { | |
5338 | /* with an existing lockowner, seqids must be the same */ | |
5db1c03f | 5339 | status = nfserr_bad_seqid; |
c53530da JL |
5340 | if (!cstate->minorversion && |
5341 | lock->lk_new_lock_seqid != lo->lo_owner.so_seqid) | |
5db1c03f | 5342 | goto out; |
64a284d0 | 5343 | } |
c53530da | 5344 | |
356a95ec | 5345 | *lst = find_or_create_lock_stateid(lo, fi, inode, ost, new); |
64a284d0 | 5346 | if (*lst == NULL) { |
5db1c03f JL |
5347 | status = nfserr_jukebox; |
5348 | goto out; | |
64a284d0 | 5349 | } |
5db1c03f JL |
5350 | status = nfs_ok; |
5351 | out: | |
5352 | nfs4_put_stateowner(&lo->lo_owner); | |
5353 | return status; | |
64a284d0 BF |
5354 | } |
5355 | ||
1da177e4 LT |
5356 | /* |
5357 | * LOCK operation | |
5358 | */ | |
b37ad28b | 5359 | __be32 |
ca364317 | 5360 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 5361 | struct nfsd4_lock *lock) |
1da177e4 | 5362 | { |
fe0750e5 BF |
5363 | struct nfs4_openowner *open_sop = NULL; |
5364 | struct nfs4_lockowner *lock_sop = NULL; | |
3d0fabd5 | 5365 | struct nfs4_ol_stateid *lock_stp = NULL; |
0667b1e9 | 5366 | struct nfs4_ol_stateid *open_stp = NULL; |
7214e860 | 5367 | struct nfs4_file *fp; |
7d947842 | 5368 | struct file *filp = NULL; |
21179d81 JL |
5369 | struct file_lock *file_lock = NULL; |
5370 | struct file_lock *conflock = NULL; | |
b37ad28b | 5371 | __be32 status = 0; |
b34f27aa | 5372 | int lkflg; |
b8dd7b9a | 5373 | int err; |
5db1c03f | 5374 | bool new = false; |
3320fef1 SK |
5375 | struct net *net = SVC_NET(rqstp); |
5376 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 LT |
5377 | |
5378 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
5379 | (long long) lock->lk_offset, | |
5380 | (long long) lock->lk_length); | |
5381 | ||
1da177e4 LT |
5382 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
5383 | return nfserr_inval; | |
5384 | ||
ca364317 | 5385 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 5386 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
5387 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
5388 | return status; | |
5389 | } | |
5390 | ||
1da177e4 | 5391 | if (lock->lk_is_new) { |
684e5638 BF |
5392 | if (nfsd4_has_session(cstate)) |
5393 | /* See rfc 5661 18.10.3: given clientid is ignored: */ | |
5394 | memcpy(&lock->v.new.clientid, | |
5395 | &cstate->session->se_client->cl_clientid, | |
5396 | sizeof(clientid_t)); | |
5397 | ||
1da177e4 | 5398 | status = nfserr_stale_clientid; |
2c142baa | 5399 | if (STALE_CLIENTID(&lock->lk_new_clientid, nn)) |
1da177e4 | 5400 | goto out; |
1da177e4 | 5401 | |
1da177e4 | 5402 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 5403 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
5404 | lock->lk_new_open_seqid, |
5405 | &lock->lk_new_open_stateid, | |
3320fef1 | 5406 | &open_stp, nn); |
37515177 | 5407 | if (status) |
1da177e4 | 5408 | goto out; |
fe0750e5 | 5409 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 5410 | status = nfserr_bad_stateid; |
684e5638 | 5411 | if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
b34f27aa BF |
5412 | &lock->v.new.clientid)) |
5413 | goto out; | |
64a284d0 | 5414 | status = lookup_or_create_lock_state(cstate, open_stp, lock, |
5db1c03f | 5415 | &lock_stp, &new); |
3d0fabd5 | 5416 | } else { |
dd453dfd | 5417 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
5418 | lock->lk_old_lock_seqid, |
5419 | &lock->lk_old_lock_stateid, | |
3320fef1 | 5420 | NFS4_LOCK_STID, &lock_stp, nn); |
3d0fabd5 | 5421 | } |
e1aaa891 BF |
5422 | if (status) |
5423 | goto out; | |
64a284d0 | 5424 | lock_sop = lockowner(lock_stp->st_stateowner); |
1da177e4 | 5425 | |
b34f27aa BF |
5426 | lkflg = setlkflg(lock->lk_type); |
5427 | status = nfs4_check_openmode(lock_stp, lkflg); | |
5428 | if (status) | |
5429 | goto out; | |
5430 | ||
0dd395dc | 5431 | status = nfserr_grace; |
3320fef1 | 5432 | if (locks_in_grace(net) && !lock->lk_reclaim) |
0dd395dc N |
5433 | goto out; |
5434 | status = nfserr_no_grace; | |
3320fef1 | 5435 | if (!locks_in_grace(net) && lock->lk_reclaim) |
0dd395dc N |
5436 | goto out; |
5437 | ||
21179d81 JL |
5438 | file_lock = locks_alloc_lock(); |
5439 | if (!file_lock) { | |
5440 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
5441 | status = nfserr_jukebox; | |
5442 | goto out; | |
5443 | } | |
5444 | ||
11b9164a | 5445 | fp = lock_stp->st_stid.sc_file; |
1da177e4 LT |
5446 | switch (lock->lk_type) { |
5447 | case NFS4_READ_LT: | |
5448 | case NFS4_READW_LT: | |
7214e860 JL |
5449 | spin_lock(&fp->fi_lock); |
5450 | filp = find_readable_file_locked(fp); | |
0997b173 BF |
5451 | if (filp) |
5452 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
7214e860 | 5453 | spin_unlock(&fp->fi_lock); |
21179d81 | 5454 | file_lock->fl_type = F_RDLCK; |
529d7b2a | 5455 | break; |
1da177e4 LT |
5456 | case NFS4_WRITE_LT: |
5457 | case NFS4_WRITEW_LT: | |
7214e860 JL |
5458 | spin_lock(&fp->fi_lock); |
5459 | filp = find_writeable_file_locked(fp); | |
0997b173 BF |
5460 | if (filp) |
5461 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
7214e860 | 5462 | spin_unlock(&fp->fi_lock); |
21179d81 | 5463 | file_lock->fl_type = F_WRLCK; |
529d7b2a | 5464 | break; |
1da177e4 LT |
5465 | default: |
5466 | status = nfserr_inval; | |
5467 | goto out; | |
5468 | } | |
f9d7562f BF |
5469 | if (!filp) { |
5470 | status = nfserr_openmode; | |
5471 | goto out; | |
5472 | } | |
aef9583b KM |
5473 | |
5474 | file_lock->fl_owner = (fl_owner_t)lockowner(nfs4_get_stateowner(&lock_sop->lo_owner)); | |
21179d81 JL |
5475 | file_lock->fl_pid = current->tgid; |
5476 | file_lock->fl_file = filp; | |
5477 | file_lock->fl_flags = FL_POSIX; | |
5478 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
5479 | file_lock->fl_start = lock->lk_offset; | |
5480 | file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); | |
5481 | nfs4_transform_lock_offset(file_lock); | |
5482 | ||
5483 | conflock = locks_alloc_lock(); | |
5484 | if (!conflock) { | |
5485 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
5486 | status = nfserr_jukebox; | |
5487 | goto out; | |
5488 | } | |
1da177e4 | 5489 | |
21179d81 | 5490 | err = vfs_lock_file(filp, F_SETLK, file_lock, conflock); |
b8dd7b9a | 5491 | switch (-err) { |
1da177e4 | 5492 | case 0: /* success! */ |
dcef0413 BF |
5493 | update_stateid(&lock_stp->st_stid.sc_stateid); |
5494 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, | |
1da177e4 | 5495 | sizeof(stateid_t)); |
b8dd7b9a | 5496 | status = 0; |
eb76b3fd AA |
5497 | break; |
5498 | case (EAGAIN): /* conflock holds conflicting lock */ | |
5499 | status = nfserr_denied; | |
5500 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
21179d81 | 5501 | nfs4_set_lock_denied(conflock, &lock->lk_denied); |
eb76b3fd | 5502 | break; |
1da177e4 LT |
5503 | case (EDEADLK): |
5504 | status = nfserr_deadlock; | |
eb76b3fd | 5505 | break; |
3e772463 | 5506 | default: |
fd85b817 | 5507 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 5508 | status = nfserrno(err); |
eb76b3fd | 5509 | break; |
1da177e4 | 5510 | } |
1da177e4 | 5511 | out: |
de18643d TM |
5512 | if (filp) |
5513 | fput(filp); | |
5db1c03f JL |
5514 | if (lock_stp) { |
5515 | /* Bump seqid manually if the 4.0 replay owner is openowner */ | |
5516 | if (cstate->replay_owner && | |
5517 | cstate->replay_owner != &lock_sop->lo_owner && | |
5518 | seqid_mutating_err(ntohl(status))) | |
5519 | lock_sop->lo_owner.so_seqid++; | |
5520 | ||
5521 | /* | |
5522 | * If this is a new, never-before-used stateid, and we are | |
5523 | * returning an error, then just go ahead and release it. | |
5524 | */ | |
5525 | if (status && new) | |
5526 | release_lock_stateid(lock_stp); | |
5527 | ||
3d0fabd5 | 5528 | nfs4_put_stid(&lock_stp->st_stid); |
5db1c03f | 5529 | } |
0667b1e9 TM |
5530 | if (open_stp) |
5531 | nfs4_put_stid(&open_stp->st_stid); | |
9411b1d4 | 5532 | nfsd4_bump_seqid(cstate, status); |
21179d81 JL |
5533 | if (file_lock) |
5534 | locks_free_lock(file_lock); | |
5535 | if (conflock) | |
5536 | locks_free_lock(conflock); | |
1da177e4 LT |
5537 | return status; |
5538 | } | |
5539 | ||
55ef1274 BF |
5540 | /* |
5541 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
5542 | * so we do a temporary open here just to get an open file to pass to | |
5543 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
5544 | * inode operation.) | |
5545 | */ | |
04da6e9d | 5546 | static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) |
55ef1274 BF |
5547 | { |
5548 | struct file *file; | |
04da6e9d AV |
5549 | __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); |
5550 | if (!err) { | |
5551 | err = nfserrno(vfs_test_lock(file, lock)); | |
fd891454 | 5552 | fput(file); |
04da6e9d | 5553 | } |
55ef1274 BF |
5554 | return err; |
5555 | } | |
5556 | ||
1da177e4 LT |
5557 | /* |
5558 | * LOCKT operation | |
5559 | */ | |
b37ad28b | 5560 | __be32 |
ca364317 BF |
5561 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
5562 | struct nfsd4_lockt *lockt) | |
1da177e4 | 5563 | { |
21179d81 | 5564 | struct file_lock *file_lock = NULL; |
5db1c03f | 5565 | struct nfs4_lockowner *lo = NULL; |
b37ad28b | 5566 | __be32 status; |
7f2210fa | 5567 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 5568 | |
5ccb0066 | 5569 | if (locks_in_grace(SVC_NET(rqstp))) |
1da177e4 LT |
5570 | return nfserr_grace; |
5571 | ||
5572 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
5573 | return nfserr_inval; | |
5574 | ||
9b2ef62b | 5575 | if (!nfsd4_has_session(cstate)) { |
4b24ca7d | 5576 | status = lookup_clientid(&lockt->lt_clientid, cstate, nn); |
9b2ef62b BF |
5577 | if (status) |
5578 | goto out; | |
5579 | } | |
1da177e4 | 5580 | |
75c096f7 | 5581 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 5582 | goto out; |
1da177e4 | 5583 | |
21179d81 JL |
5584 | file_lock = locks_alloc_lock(); |
5585 | if (!file_lock) { | |
5586 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
5587 | status = nfserr_jukebox; | |
5588 | goto out; | |
5589 | } | |
6cd90662 | 5590 | |
1da177e4 LT |
5591 | switch (lockt->lt_type) { |
5592 | case NFS4_READ_LT: | |
5593 | case NFS4_READW_LT: | |
21179d81 | 5594 | file_lock->fl_type = F_RDLCK; |
1da177e4 LT |
5595 | break; |
5596 | case NFS4_WRITE_LT: | |
5597 | case NFS4_WRITEW_LT: | |
21179d81 | 5598 | file_lock->fl_type = F_WRLCK; |
1da177e4 LT |
5599 | break; |
5600 | default: | |
2fdada03 | 5601 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
5602 | status = nfserr_inval; |
5603 | goto out; | |
5604 | } | |
5605 | ||
d4f0489f TM |
5606 | lo = find_lockowner_str(&lockt->lt_clientid, &lockt->lt_owner, |
5607 | cstate->clp); | |
fe0750e5 | 5608 | if (lo) |
21179d81 JL |
5609 | file_lock->fl_owner = (fl_owner_t)lo; |
5610 | file_lock->fl_pid = current->tgid; | |
5611 | file_lock->fl_flags = FL_POSIX; | |
1da177e4 | 5612 | |
21179d81 JL |
5613 | file_lock->fl_start = lockt->lt_offset; |
5614 | file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); | |
1da177e4 | 5615 | |
21179d81 | 5616 | nfs4_transform_lock_offset(file_lock); |
1da177e4 | 5617 | |
21179d81 | 5618 | status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock); |
04da6e9d | 5619 | if (status) |
fd85b817 | 5620 | goto out; |
04da6e9d | 5621 | |
21179d81 | 5622 | if (file_lock->fl_type != F_UNLCK) { |
1da177e4 | 5623 | status = nfserr_denied; |
21179d81 | 5624 | nfs4_set_lock_denied(file_lock, &lockt->lt_denied); |
1da177e4 LT |
5625 | } |
5626 | out: | |
5db1c03f JL |
5627 | if (lo) |
5628 | nfs4_put_stateowner(&lo->lo_owner); | |
21179d81 JL |
5629 | if (file_lock) |
5630 | locks_free_lock(file_lock); | |
1da177e4 LT |
5631 | return status; |
5632 | } | |
5633 | ||
b37ad28b | 5634 | __be32 |
ca364317 | 5635 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 5636 | struct nfsd4_locku *locku) |
1da177e4 | 5637 | { |
dcef0413 | 5638 | struct nfs4_ol_stateid *stp; |
1da177e4 | 5639 | struct file *filp = NULL; |
21179d81 | 5640 | struct file_lock *file_lock = NULL; |
b37ad28b | 5641 | __be32 status; |
b8dd7b9a | 5642 | int err; |
3320fef1 SK |
5643 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
5644 | ||
1da177e4 LT |
5645 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", |
5646 | (long long) locku->lu_offset, | |
5647 | (long long) locku->lu_length); | |
5648 | ||
5649 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
5650 | return nfserr_inval; | |
5651 | ||
9072d5c6 | 5652 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
3320fef1 SK |
5653 | &locku->lu_stateid, NFS4_LOCK_STID, |
5654 | &stp, nn); | |
9072d5c6 | 5655 | if (status) |
1da177e4 | 5656 | goto out; |
11b9164a | 5657 | filp = find_any_file(stp->st_stid.sc_file); |
f9d7562f BF |
5658 | if (!filp) { |
5659 | status = nfserr_lock_range; | |
858cc573 | 5660 | goto put_stateid; |
f9d7562f | 5661 | } |
21179d81 JL |
5662 | file_lock = locks_alloc_lock(); |
5663 | if (!file_lock) { | |
5664 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
5665 | status = nfserr_jukebox; | |
de18643d | 5666 | goto fput; |
21179d81 | 5667 | } |
6cd90662 | 5668 | |
21179d81 | 5669 | file_lock->fl_type = F_UNLCK; |
aef9583b | 5670 | file_lock->fl_owner = (fl_owner_t)lockowner(nfs4_get_stateowner(stp->st_stateowner)); |
21179d81 JL |
5671 | file_lock->fl_pid = current->tgid; |
5672 | file_lock->fl_file = filp; | |
5673 | file_lock->fl_flags = FL_POSIX; | |
5674 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
5675 | file_lock->fl_start = locku->lu_offset; | |
5676 | ||
5677 | file_lock->fl_end = last_byte_offset(locku->lu_offset, | |
5678 | locku->lu_length); | |
5679 | nfs4_transform_lock_offset(file_lock); | |
1da177e4 | 5680 | |
21179d81 | 5681 | err = vfs_lock_file(filp, F_SETLK, file_lock, NULL); |
b8dd7b9a | 5682 | if (err) { |
fd85b817 | 5683 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
5684 | goto out_nfserr; |
5685 | } | |
dcef0413 BF |
5686 | update_stateid(&stp->st_stid.sc_stateid); |
5687 | memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
de18643d TM |
5688 | fput: |
5689 | fput(filp); | |
858cc573 TM |
5690 | put_stateid: |
5691 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 5692 | out: |
9411b1d4 | 5693 | nfsd4_bump_seqid(cstate, status); |
21179d81 JL |
5694 | if (file_lock) |
5695 | locks_free_lock(file_lock); | |
1da177e4 LT |
5696 | return status; |
5697 | ||
5698 | out_nfserr: | |
b8dd7b9a | 5699 | status = nfserrno(err); |
de18643d | 5700 | goto fput; |
1da177e4 LT |
5701 | } |
5702 | ||
5703 | /* | |
5704 | * returns | |
f9c00c3a JL |
5705 | * true: locks held by lockowner |
5706 | * false: no locks held by lockowner | |
1da177e4 | 5707 | */ |
f9c00c3a JL |
5708 | static bool |
5709 | check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner) | |
1da177e4 | 5710 | { |
bd61e0a9 | 5711 | struct file_lock *fl; |
f9c00c3a JL |
5712 | int status = false; |
5713 | struct file *filp = find_any_file(fp); | |
5714 | struct inode *inode; | |
bd61e0a9 | 5715 | struct file_lock_context *flctx; |
f9c00c3a JL |
5716 | |
5717 | if (!filp) { | |
5718 | /* Any valid lock stateid should have some sort of access */ | |
5719 | WARN_ON_ONCE(1); | |
5720 | return status; | |
5721 | } | |
5722 | ||
5723 | inode = file_inode(filp); | |
bd61e0a9 JL |
5724 | flctx = inode->i_flctx; |
5725 | ||
5726 | if (flctx && !list_empty_careful(&flctx->flc_posix)) { | |
6109c850 | 5727 | spin_lock(&flctx->flc_lock); |
bd61e0a9 JL |
5728 | list_for_each_entry(fl, &flctx->flc_posix, fl_list) { |
5729 | if (fl->fl_owner == (fl_owner_t)lowner) { | |
5730 | status = true; | |
5731 | break; | |
5732 | } | |
796dadfd | 5733 | } |
6109c850 | 5734 | spin_unlock(&flctx->flc_lock); |
1da177e4 | 5735 | } |
f9c00c3a | 5736 | fput(filp); |
1da177e4 LT |
5737 | return status; |
5738 | } | |
5739 | ||
b37ad28b | 5740 | __be32 |
b591480b BF |
5741 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
5742 | struct nfsd4_compound_state *cstate, | |
5743 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
5744 | { |
5745 | clientid_t *clid = &rlockowner->rl_clientid; | |
882e9d25 JL |
5746 | struct nfs4_stateowner *sop; |
5747 | struct nfs4_lockowner *lo = NULL; | |
dcef0413 | 5748 | struct nfs4_ol_stateid *stp; |
1da177e4 | 5749 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
d4f0489f | 5750 | unsigned int hashval = ownerstr_hashval(owner); |
b37ad28b | 5751 | __be32 status; |
7f2210fa | 5752 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
c58c6610 | 5753 | struct nfs4_client *clp; |
1da177e4 LT |
5754 | |
5755 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
5756 | clid->cl_boot, clid->cl_id); | |
5757 | ||
4b24ca7d | 5758 | status = lookup_clientid(clid, cstate, nn); |
9b2ef62b | 5759 | if (status) |
51f5e783 | 5760 | return status; |
9b2ef62b | 5761 | |
d4f0489f | 5762 | clp = cstate->clp; |
fd44907c | 5763 | /* Find the matching lock stateowner */ |
d4f0489f | 5764 | spin_lock(&clp->cl_lock); |
882e9d25 | 5765 | list_for_each_entry(sop, &clp->cl_ownerstr_hashtbl[hashval], |
d4f0489f | 5766 | so_strhash) { |
fd44907c | 5767 | |
882e9d25 JL |
5768 | if (sop->so_is_open_owner || !same_owner_str(sop, owner)) |
5769 | continue; | |
fd44907c | 5770 | |
882e9d25 JL |
5771 | /* see if there are still any locks associated with it */ |
5772 | lo = lockowner(sop); | |
5773 | list_for_each_entry(stp, &sop->so_stateids, st_perstateowner) { | |
5774 | if (check_for_locks(stp->st_stid.sc_file, lo)) { | |
5775 | status = nfserr_locks_held; | |
5776 | spin_unlock(&clp->cl_lock); | |
51f5e783 | 5777 | return status; |
882e9d25 | 5778 | } |
5adfd885 | 5779 | } |
882e9d25 | 5780 | |
b5971afa | 5781 | nfs4_get_stateowner(sop); |
882e9d25 | 5782 | break; |
1da177e4 | 5783 | } |
c58c6610 | 5784 | spin_unlock(&clp->cl_lock); |
882e9d25 JL |
5785 | if (lo) |
5786 | release_lockowner(lo); | |
1da177e4 LT |
5787 | return status; |
5788 | } | |
5789 | ||
5790 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 5791 | alloc_reclaim(void) |
1da177e4 | 5792 | { |
a55370a3 | 5793 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
5794 | } |
5795 | ||
0ce0c2b5 | 5796 | bool |
52e19c09 | 5797 | nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn) |
c7b9a459 | 5798 | { |
0ce0c2b5 | 5799 | struct nfs4_client_reclaim *crp; |
c7b9a459 | 5800 | |
52e19c09 | 5801 | crp = nfsd4_find_reclaim_client(name, nn); |
0ce0c2b5 | 5802 | return (crp && crp->cr_clp); |
c7b9a459 N |
5803 | } |
5804 | ||
1da177e4 LT |
5805 | /* |
5806 | * failure => all reset bets are off, nfserr_no_grace... | |
5807 | */ | |
772a9bbb | 5808 | struct nfs4_client_reclaim * |
52e19c09 | 5809 | nfs4_client_to_reclaim(const char *name, struct nfsd_net *nn) |
1da177e4 LT |
5810 | { |
5811 | unsigned int strhashval; | |
772a9bbb | 5812 | struct nfs4_client_reclaim *crp; |
1da177e4 | 5813 | |
a55370a3 N |
5814 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
5815 | crp = alloc_reclaim(); | |
772a9bbb JL |
5816 | if (crp) { |
5817 | strhashval = clientstr_hashval(name); | |
5818 | INIT_LIST_HEAD(&crp->cr_strhash); | |
52e19c09 | 5819 | list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]); |
772a9bbb | 5820 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
0ce0c2b5 | 5821 | crp->cr_clp = NULL; |
52e19c09 | 5822 | nn->reclaim_str_hashtbl_size++; |
772a9bbb JL |
5823 | } |
5824 | return crp; | |
1da177e4 LT |
5825 | } |
5826 | ||
ce30e539 | 5827 | void |
52e19c09 | 5828 | nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn) |
ce30e539 JL |
5829 | { |
5830 | list_del(&crp->cr_strhash); | |
5831 | kfree(crp); | |
52e19c09 | 5832 | nn->reclaim_str_hashtbl_size--; |
ce30e539 JL |
5833 | } |
5834 | ||
2a4317c5 | 5835 | void |
52e19c09 | 5836 | nfs4_release_reclaim(struct nfsd_net *nn) |
1da177e4 LT |
5837 | { |
5838 | struct nfs4_client_reclaim *crp = NULL; | |
5839 | int i; | |
5840 | ||
1da177e4 | 5841 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
52e19c09 SK |
5842 | while (!list_empty(&nn->reclaim_str_hashtbl[i])) { |
5843 | crp = list_entry(nn->reclaim_str_hashtbl[i].next, | |
1da177e4 | 5844 | struct nfs4_client_reclaim, cr_strhash); |
52e19c09 | 5845 | nfs4_remove_reclaim_record(crp, nn); |
1da177e4 LT |
5846 | } |
5847 | } | |
063b0fb9 | 5848 | WARN_ON_ONCE(nn->reclaim_str_hashtbl_size); |
1da177e4 LT |
5849 | } |
5850 | ||
5851 | /* | |
5852 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
2a4317c5 | 5853 | struct nfs4_client_reclaim * |
52e19c09 | 5854 | nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn) |
1da177e4 LT |
5855 | { |
5856 | unsigned int strhashval; | |
1da177e4 LT |
5857 | struct nfs4_client_reclaim *crp = NULL; |
5858 | ||
278c931c | 5859 | dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir); |
1da177e4 | 5860 | |
278c931c | 5861 | strhashval = clientstr_hashval(recdir); |
52e19c09 | 5862 | list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) { |
278c931c | 5863 | if (same_name(crp->cr_recdir, recdir)) { |
1da177e4 LT |
5864 | return crp; |
5865 | } | |
5866 | } | |
5867 | return NULL; | |
5868 | } | |
5869 | ||
5870 | /* | |
5871 | * Called from OPEN. Look for clientid in reclaim list. | |
5872 | */ | |
b37ad28b | 5873 | __be32 |
0fe492db TM |
5874 | nfs4_check_open_reclaim(clientid_t *clid, |
5875 | struct nfsd4_compound_state *cstate, | |
5876 | struct nfsd_net *nn) | |
1da177e4 | 5877 | { |
0fe492db | 5878 | __be32 status; |
a52d726b JL |
5879 | |
5880 | /* find clientid in conf_id_hashtbl */ | |
0fe492db TM |
5881 | status = lookup_clientid(clid, cstate, nn); |
5882 | if (status) | |
a52d726b JL |
5883 | return nfserr_reclaim_bad; |
5884 | ||
3b3e7b72 JL |
5885 | if (test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, &cstate->clp->cl_flags)) |
5886 | return nfserr_no_grace; | |
5887 | ||
0fe492db TM |
5888 | if (nfsd4_client_record_check(cstate->clp)) |
5889 | return nfserr_reclaim_bad; | |
5890 | ||
5891 | return nfs_ok; | |
1da177e4 LT |
5892 | } |
5893 | ||
65178db4 | 5894 | #ifdef CONFIG_NFSD_FAULT_INJECTION |
016200c3 JL |
5895 | static inline void |
5896 | put_client(struct nfs4_client *clp) | |
5897 | { | |
5898 | atomic_dec(&clp->cl_refcount); | |
5899 | } | |
5900 | ||
285abdee JL |
5901 | static struct nfs4_client * |
5902 | nfsd_find_client(struct sockaddr_storage *addr, size_t addr_size) | |
5903 | { | |
5904 | struct nfs4_client *clp; | |
5905 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
5906 | nfsd_net_id); | |
5907 | ||
5908 | if (!nfsd_netns_ready(nn)) | |
5909 | return NULL; | |
5910 | ||
5911 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
5912 | if (memcmp(&clp->cl_addr, addr, addr_size) == 0) | |
5913 | return clp; | |
5914 | } | |
5915 | return NULL; | |
5916 | } | |
5917 | ||
7ec0e36f | 5918 | u64 |
285abdee | 5919 | nfsd_inject_print_clients(void) |
7ec0e36f JL |
5920 | { |
5921 | struct nfs4_client *clp; | |
5922 | u64 count = 0; | |
5923 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
5924 | nfsd_net_id); | |
5925 | char buf[INET6_ADDRSTRLEN]; | |
5926 | ||
5927 | if (!nfsd_netns_ready(nn)) | |
5928 | return 0; | |
5929 | ||
5930 | spin_lock(&nn->client_lock); | |
5931 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
5932 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); | |
5933 | pr_info("NFS Client: %s\n", buf); | |
5934 | ++count; | |
5935 | } | |
5936 | spin_unlock(&nn->client_lock); | |
5937 | ||
5938 | return count; | |
5939 | } | |
65178db4 | 5940 | |
a0926d15 | 5941 | u64 |
285abdee | 5942 | nfsd_inject_forget_client(struct sockaddr_storage *addr, size_t addr_size) |
a0926d15 JL |
5943 | { |
5944 | u64 count = 0; | |
5945 | struct nfs4_client *clp; | |
5946 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
5947 | nfsd_net_id); | |
5948 | ||
5949 | if (!nfsd_netns_ready(nn)) | |
5950 | return count; | |
5951 | ||
5952 | spin_lock(&nn->client_lock); | |
5953 | clp = nfsd_find_client(addr, addr_size); | |
5954 | if (clp) { | |
5955 | if (mark_client_expired_locked(clp) == nfs_ok) | |
5956 | ++count; | |
5957 | else | |
5958 | clp = NULL; | |
5959 | } | |
5960 | spin_unlock(&nn->client_lock); | |
5961 | ||
5962 | if (clp) | |
5963 | expire_client(clp); | |
5964 | ||
5965 | return count; | |
5966 | } | |
5967 | ||
69fc9edf | 5968 | u64 |
285abdee | 5969 | nfsd_inject_forget_clients(u64 max) |
69fc9edf JL |
5970 | { |
5971 | u64 count = 0; | |
5972 | struct nfs4_client *clp, *next; | |
5973 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
5974 | nfsd_net_id); | |
5975 | LIST_HEAD(reaplist); | |
5976 | ||
5977 | if (!nfsd_netns_ready(nn)) | |
5978 | return count; | |
5979 | ||
5980 | spin_lock(&nn->client_lock); | |
5981 | list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { | |
5982 | if (mark_client_expired_locked(clp) == nfs_ok) { | |
5983 | list_add(&clp->cl_lru, &reaplist); | |
5984 | if (max != 0 && ++count >= max) | |
5985 | break; | |
5986 | } | |
5987 | } | |
5988 | spin_unlock(&nn->client_lock); | |
5989 | ||
5990 | list_for_each_entry_safe(clp, next, &reaplist, cl_lru) | |
5991 | expire_client(clp); | |
5992 | ||
5993 | return count; | |
5994 | } | |
5995 | ||
184c1847 BS |
5996 | static void nfsd_print_count(struct nfs4_client *clp, unsigned int count, |
5997 | const char *type) | |
5998 | { | |
5999 | char buf[INET6_ADDRSTRLEN]; | |
0a5c33e2 | 6000 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
184c1847 BS |
6001 | printk(KERN_INFO "NFS Client: %s has %u %s\n", buf, count, type); |
6002 | } | |
6003 | ||
016200c3 JL |
6004 | static void |
6005 | nfsd_inject_add_lock_to_list(struct nfs4_ol_stateid *lst, | |
6006 | struct list_head *collect) | |
6007 | { | |
6008 | struct nfs4_client *clp = lst->st_stid.sc_client; | |
6009 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6010 | nfsd_net_id); | |
6011 | ||
6012 | if (!collect) | |
6013 | return; | |
6014 | ||
6015 | lockdep_assert_held(&nn->client_lock); | |
6016 | atomic_inc(&clp->cl_refcount); | |
6017 | list_add(&lst->st_locks, collect); | |
6018 | } | |
6019 | ||
3c87b9b7 | 6020 | static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max, |
3738d50e | 6021 | struct list_head *collect, |
3c87b9b7 | 6022 | void (*func)(struct nfs4_ol_stateid *)) |
fc29171f BS |
6023 | { |
6024 | struct nfs4_openowner *oop; | |
fc29171f | 6025 | struct nfs4_ol_stateid *stp, *st_next; |
3c87b9b7 | 6026 | struct nfs4_ol_stateid *lst, *lst_next; |
fc29171f BS |
6027 | u64 count = 0; |
6028 | ||
016200c3 | 6029 | spin_lock(&clp->cl_lock); |
fc29171f | 6030 | list_for_each_entry(oop, &clp->cl_openowners, oo_perclient) { |
3c87b9b7 TM |
6031 | list_for_each_entry_safe(stp, st_next, |
6032 | &oop->oo_owner.so_stateids, st_perstateowner) { | |
6033 | list_for_each_entry_safe(lst, lst_next, | |
6034 | &stp->st_locks, st_locks) { | |
3738d50e | 6035 | if (func) { |
3c87b9b7 | 6036 | func(lst); |
016200c3 JL |
6037 | nfsd_inject_add_lock_to_list(lst, |
6038 | collect); | |
3738d50e | 6039 | } |
016200c3 JL |
6040 | ++count; |
6041 | /* | |
6042 | * Despite the fact that these functions deal | |
6043 | * with 64-bit integers for "count", we must | |
6044 | * ensure that it doesn't blow up the | |
6045 | * clp->cl_refcount. Throw a warning if we | |
6046 | * start to approach INT_MAX here. | |
6047 | */ | |
6048 | WARN_ON_ONCE(count == (INT_MAX / 2)); | |
6049 | if (count == max) | |
6050 | goto out; | |
fc29171f BS |
6051 | } |
6052 | } | |
6053 | } | |
016200c3 JL |
6054 | out: |
6055 | spin_unlock(&clp->cl_lock); | |
fc29171f BS |
6056 | |
6057 | return count; | |
6058 | } | |
6059 | ||
016200c3 JL |
6060 | static u64 |
6061 | nfsd_collect_client_locks(struct nfs4_client *clp, struct list_head *collect, | |
6062 | u64 max) | |
fc29171f | 6063 | { |
016200c3 | 6064 | return nfsd_foreach_client_lock(clp, max, collect, unhash_lock_stateid); |
fc29171f BS |
6065 | } |
6066 | ||
016200c3 JL |
6067 | static u64 |
6068 | nfsd_print_client_locks(struct nfs4_client *clp) | |
184c1847 | 6069 | { |
016200c3 | 6070 | u64 count = nfsd_foreach_client_lock(clp, 0, NULL, NULL); |
184c1847 BS |
6071 | nfsd_print_count(clp, count, "locked files"); |
6072 | return count; | |
6073 | } | |
6074 | ||
016200c3 | 6075 | u64 |
285abdee | 6076 | nfsd_inject_print_locks(void) |
016200c3 JL |
6077 | { |
6078 | struct nfs4_client *clp; | |
6079 | u64 count = 0; | |
6080 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6081 | nfsd_net_id); | |
6082 | ||
6083 | if (!nfsd_netns_ready(nn)) | |
6084 | return 0; | |
6085 | ||
6086 | spin_lock(&nn->client_lock); | |
6087 | list_for_each_entry(clp, &nn->client_lru, cl_lru) | |
6088 | count += nfsd_print_client_locks(clp); | |
6089 | spin_unlock(&nn->client_lock); | |
6090 | ||
6091 | return count; | |
6092 | } | |
6093 | ||
6094 | static void | |
6095 | nfsd_reap_locks(struct list_head *reaplist) | |
6096 | { | |
6097 | struct nfs4_client *clp; | |
6098 | struct nfs4_ol_stateid *stp, *next; | |
6099 | ||
6100 | list_for_each_entry_safe(stp, next, reaplist, st_locks) { | |
6101 | list_del_init(&stp->st_locks); | |
6102 | clp = stp->st_stid.sc_client; | |
6103 | nfs4_put_stid(&stp->st_stid); | |
6104 | put_client(clp); | |
6105 | } | |
6106 | } | |
6107 | ||
6108 | u64 | |
285abdee | 6109 | nfsd_inject_forget_client_locks(struct sockaddr_storage *addr, size_t addr_size) |
016200c3 JL |
6110 | { |
6111 | unsigned int count = 0; | |
6112 | struct nfs4_client *clp; | |
6113 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6114 | nfsd_net_id); | |
6115 | LIST_HEAD(reaplist); | |
6116 | ||
6117 | if (!nfsd_netns_ready(nn)) | |
6118 | return count; | |
6119 | ||
6120 | spin_lock(&nn->client_lock); | |
6121 | clp = nfsd_find_client(addr, addr_size); | |
6122 | if (clp) | |
6123 | count = nfsd_collect_client_locks(clp, &reaplist, 0); | |
6124 | spin_unlock(&nn->client_lock); | |
6125 | nfsd_reap_locks(&reaplist); | |
6126 | return count; | |
6127 | } | |
6128 | ||
6129 | u64 | |
285abdee | 6130 | nfsd_inject_forget_locks(u64 max) |
016200c3 JL |
6131 | { |
6132 | u64 count = 0; | |
6133 | struct nfs4_client *clp; | |
6134 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6135 | nfsd_net_id); | |
6136 | LIST_HEAD(reaplist); | |
6137 | ||
6138 | if (!nfsd_netns_ready(nn)) | |
6139 | return count; | |
6140 | ||
6141 | spin_lock(&nn->client_lock); | |
6142 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
6143 | count += nfsd_collect_client_locks(clp, &reaplist, max - count); | |
6144 | if (max != 0 && count >= max) | |
6145 | break; | |
6146 | } | |
6147 | spin_unlock(&nn->client_lock); | |
6148 | nfsd_reap_locks(&reaplist); | |
6149 | return count; | |
6150 | } | |
6151 | ||
82e05efa JL |
6152 | static u64 |
6153 | nfsd_foreach_client_openowner(struct nfs4_client *clp, u64 max, | |
6154 | struct list_head *collect, | |
6155 | void (*func)(struct nfs4_openowner *)) | |
4dbdbda8 BS |
6156 | { |
6157 | struct nfs4_openowner *oop, *next; | |
82e05efa JL |
6158 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, |
6159 | nfsd_net_id); | |
4dbdbda8 BS |
6160 | u64 count = 0; |
6161 | ||
82e05efa JL |
6162 | lockdep_assert_held(&nn->client_lock); |
6163 | ||
6164 | spin_lock(&clp->cl_lock); | |
4dbdbda8 | 6165 | list_for_each_entry_safe(oop, next, &clp->cl_openowners, oo_perclient) { |
82e05efa | 6166 | if (func) { |
4dbdbda8 | 6167 | func(oop); |
82e05efa JL |
6168 | if (collect) { |
6169 | atomic_inc(&clp->cl_refcount); | |
6170 | list_add(&oop->oo_perclient, collect); | |
6171 | } | |
6172 | } | |
6173 | ++count; | |
6174 | /* | |
6175 | * Despite the fact that these functions deal with | |
6176 | * 64-bit integers for "count", we must ensure that | |
6177 | * it doesn't blow up the clp->cl_refcount. Throw a | |
6178 | * warning if we start to approach INT_MAX here. | |
6179 | */ | |
6180 | WARN_ON_ONCE(count == (INT_MAX / 2)); | |
6181 | if (count == max) | |
4dbdbda8 BS |
6182 | break; |
6183 | } | |
82e05efa JL |
6184 | spin_unlock(&clp->cl_lock); |
6185 | ||
6186 | return count; | |
6187 | } | |
6188 | ||
6189 | static u64 | |
6190 | nfsd_print_client_openowners(struct nfs4_client *clp) | |
6191 | { | |
6192 | u64 count = nfsd_foreach_client_openowner(clp, 0, NULL, NULL); | |
6193 | ||
6194 | nfsd_print_count(clp, count, "openowners"); | |
6195 | return count; | |
6196 | } | |
6197 | ||
6198 | static u64 | |
6199 | nfsd_collect_client_openowners(struct nfs4_client *clp, | |
6200 | struct list_head *collect, u64 max) | |
6201 | { | |
6202 | return nfsd_foreach_client_openowner(clp, max, collect, | |
6203 | unhash_openowner_locked); | |
6204 | } | |
6205 | ||
6206 | u64 | |
285abdee | 6207 | nfsd_inject_print_openowners(void) |
82e05efa JL |
6208 | { |
6209 | struct nfs4_client *clp; | |
6210 | u64 count = 0; | |
6211 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6212 | nfsd_net_id); | |
6213 | ||
6214 | if (!nfsd_netns_ready(nn)) | |
6215 | return 0; | |
6216 | ||
6217 | spin_lock(&nn->client_lock); | |
6218 | list_for_each_entry(clp, &nn->client_lru, cl_lru) | |
6219 | count += nfsd_print_client_openowners(clp); | |
6220 | spin_unlock(&nn->client_lock); | |
4dbdbda8 BS |
6221 | |
6222 | return count; | |
6223 | } | |
6224 | ||
82e05efa JL |
6225 | static void |
6226 | nfsd_reap_openowners(struct list_head *reaplist) | |
6227 | { | |
6228 | struct nfs4_client *clp; | |
6229 | struct nfs4_openowner *oop, *next; | |
6230 | ||
6231 | list_for_each_entry_safe(oop, next, reaplist, oo_perclient) { | |
6232 | list_del_init(&oop->oo_perclient); | |
6233 | clp = oop->oo_owner.so_client; | |
6234 | release_openowner(oop); | |
6235 | put_client(clp); | |
6236 | } | |
6237 | } | |
6238 | ||
6239 | u64 | |
285abdee JL |
6240 | nfsd_inject_forget_client_openowners(struct sockaddr_storage *addr, |
6241 | size_t addr_size) | |
4dbdbda8 | 6242 | { |
82e05efa JL |
6243 | unsigned int count = 0; |
6244 | struct nfs4_client *clp; | |
6245 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6246 | nfsd_net_id); | |
6247 | LIST_HEAD(reaplist); | |
6248 | ||
6249 | if (!nfsd_netns_ready(nn)) | |
6250 | return count; | |
6251 | ||
6252 | spin_lock(&nn->client_lock); | |
6253 | clp = nfsd_find_client(addr, addr_size); | |
6254 | if (clp) | |
6255 | count = nfsd_collect_client_openowners(clp, &reaplist, 0); | |
6256 | spin_unlock(&nn->client_lock); | |
6257 | nfsd_reap_openowners(&reaplist); | |
6258 | return count; | |
4dbdbda8 BS |
6259 | } |
6260 | ||
82e05efa | 6261 | u64 |
285abdee | 6262 | nfsd_inject_forget_openowners(u64 max) |
184c1847 | 6263 | { |
82e05efa JL |
6264 | u64 count = 0; |
6265 | struct nfs4_client *clp; | |
6266 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6267 | nfsd_net_id); | |
6268 | LIST_HEAD(reaplist); | |
6269 | ||
6270 | if (!nfsd_netns_ready(nn)) | |
6271 | return count; | |
6272 | ||
6273 | spin_lock(&nn->client_lock); | |
6274 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
6275 | count += nfsd_collect_client_openowners(clp, &reaplist, | |
6276 | max - count); | |
6277 | if (max != 0 && count >= max) | |
6278 | break; | |
6279 | } | |
6280 | spin_unlock(&nn->client_lock); | |
6281 | nfsd_reap_openowners(&reaplist); | |
184c1847 BS |
6282 | return count; |
6283 | } | |
6284 | ||
269de30f BS |
6285 | static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max, |
6286 | struct list_head *victims) | |
6287 | { | |
6288 | struct nfs4_delegation *dp, *next; | |
98d5c7c5 JL |
6289 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, |
6290 | nfsd_net_id); | |
269de30f BS |
6291 | u64 count = 0; |
6292 | ||
98d5c7c5 JL |
6293 | lockdep_assert_held(&nn->client_lock); |
6294 | ||
6295 | spin_lock(&state_lock); | |
269de30f | 6296 | list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) { |
dff1399f JL |
6297 | if (victims) { |
6298 | /* | |
6299 | * It's not safe to mess with delegations that have a | |
6300 | * non-zero dl_time. They might have already been broken | |
6301 | * and could be processed by the laundromat outside of | |
6302 | * the state_lock. Just leave them be. | |
6303 | */ | |
6304 | if (dp->dl_time != 0) | |
6305 | continue; | |
6306 | ||
98d5c7c5 | 6307 | atomic_inc(&clp->cl_refcount); |
42690676 JL |
6308 | unhash_delegation_locked(dp); |
6309 | list_add(&dp->dl_recall_lru, victims); | |
dff1399f | 6310 | } |
98d5c7c5 JL |
6311 | ++count; |
6312 | /* | |
6313 | * Despite the fact that these functions deal with | |
6314 | * 64-bit integers for "count", we must ensure that | |
6315 | * it doesn't blow up the clp->cl_refcount. Throw a | |
6316 | * warning if we start to approach INT_MAX here. | |
6317 | */ | |
6318 | WARN_ON_ONCE(count == (INT_MAX / 2)); | |
6319 | if (count == max) | |
269de30f BS |
6320 | break; |
6321 | } | |
98d5c7c5 | 6322 | spin_unlock(&state_lock); |
269de30f BS |
6323 | return count; |
6324 | } | |
6325 | ||
98d5c7c5 JL |
6326 | static u64 |
6327 | nfsd_print_client_delegations(struct nfs4_client *clp) | |
269de30f | 6328 | { |
98d5c7c5 | 6329 | u64 count = nfsd_find_all_delegations(clp, 0, NULL); |
269de30f | 6330 | |
98d5c7c5 JL |
6331 | nfsd_print_count(clp, count, "delegations"); |
6332 | return count; | |
6333 | } | |
6334 | ||
6335 | u64 | |
285abdee | 6336 | nfsd_inject_print_delegations(void) |
98d5c7c5 JL |
6337 | { |
6338 | struct nfs4_client *clp; | |
6339 | u64 count = 0; | |
6340 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6341 | nfsd_net_id); | |
6342 | ||
6343 | if (!nfsd_netns_ready(nn)) | |
6344 | return 0; | |
269de30f | 6345 | |
98d5c7c5 JL |
6346 | spin_lock(&nn->client_lock); |
6347 | list_for_each_entry(clp, &nn->client_lru, cl_lru) | |
6348 | count += nfsd_print_client_delegations(clp); | |
6349 | spin_unlock(&nn->client_lock); | |
6350 | ||
6351 | return count; | |
6352 | } | |
6353 | ||
6354 | static void | |
6355 | nfsd_forget_delegations(struct list_head *reaplist) | |
6356 | { | |
6357 | struct nfs4_client *clp; | |
6358 | struct nfs4_delegation *dp, *next; | |
6359 | ||
6360 | list_for_each_entry_safe(dp, next, reaplist, dl_recall_lru) { | |
2d4a532d | 6361 | list_del_init(&dp->dl_recall_lru); |
98d5c7c5 | 6362 | clp = dp->dl_stid.sc_client; |
3bd64a5b | 6363 | revoke_delegation(dp); |
98d5c7c5 | 6364 | put_client(clp); |
2d4a532d | 6365 | } |
98d5c7c5 JL |
6366 | } |
6367 | ||
6368 | u64 | |
285abdee JL |
6369 | nfsd_inject_forget_client_delegations(struct sockaddr_storage *addr, |
6370 | size_t addr_size) | |
98d5c7c5 JL |
6371 | { |
6372 | u64 count = 0; | |
6373 | struct nfs4_client *clp; | |
6374 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6375 | nfsd_net_id); | |
6376 | LIST_HEAD(reaplist); | |
6377 | ||
6378 | if (!nfsd_netns_ready(nn)) | |
6379 | return count; | |
6380 | ||
6381 | spin_lock(&nn->client_lock); | |
6382 | clp = nfsd_find_client(addr, addr_size); | |
6383 | if (clp) | |
6384 | count = nfsd_find_all_delegations(clp, 0, &reaplist); | |
6385 | spin_unlock(&nn->client_lock); | |
6386 | ||
6387 | nfsd_forget_delegations(&reaplist); | |
6388 | return count; | |
6389 | } | |
269de30f | 6390 | |
98d5c7c5 | 6391 | u64 |
285abdee | 6392 | nfsd_inject_forget_delegations(u64 max) |
98d5c7c5 JL |
6393 | { |
6394 | u64 count = 0; | |
6395 | struct nfs4_client *clp; | |
6396 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6397 | nfsd_net_id); | |
6398 | LIST_HEAD(reaplist); | |
6399 | ||
6400 | if (!nfsd_netns_ready(nn)) | |
6401 | return count; | |
6402 | ||
6403 | spin_lock(&nn->client_lock); | |
6404 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
6405 | count += nfsd_find_all_delegations(clp, max - count, &reaplist); | |
6406 | if (max != 0 && count >= max) | |
6407 | break; | |
6408 | } | |
6409 | spin_unlock(&nn->client_lock); | |
6410 | nfsd_forget_delegations(&reaplist); | |
269de30f BS |
6411 | return count; |
6412 | } | |
6413 | ||
98d5c7c5 JL |
6414 | static void |
6415 | nfsd_recall_delegations(struct list_head *reaplist) | |
269de30f | 6416 | { |
98d5c7c5 JL |
6417 | struct nfs4_client *clp; |
6418 | struct nfs4_delegation *dp, *next; | |
269de30f | 6419 | |
98d5c7c5 | 6420 | list_for_each_entry_safe(dp, next, reaplist, dl_recall_lru) { |
dff1399f | 6421 | list_del_init(&dp->dl_recall_lru); |
98d5c7c5 JL |
6422 | clp = dp->dl_stid.sc_client; |
6423 | /* | |
6424 | * We skipped all entries that had a zero dl_time before, | |
6425 | * so we can now reset the dl_time back to 0. If a delegation | |
6426 | * break comes in now, then it won't make any difference since | |
6427 | * we're recalling it either way. | |
6428 | */ | |
6429 | spin_lock(&state_lock); | |
dff1399f | 6430 | dp->dl_time = 0; |
98d5c7c5 | 6431 | spin_unlock(&state_lock); |
269de30f | 6432 | nfsd_break_one_deleg(dp); |
98d5c7c5 | 6433 | put_client(clp); |
dff1399f | 6434 | } |
98d5c7c5 | 6435 | } |
269de30f | 6436 | |
98d5c7c5 | 6437 | u64 |
285abdee | 6438 | nfsd_inject_recall_client_delegations(struct sockaddr_storage *addr, |
98d5c7c5 JL |
6439 | size_t addr_size) |
6440 | { | |
6441 | u64 count = 0; | |
6442 | struct nfs4_client *clp; | |
6443 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6444 | nfsd_net_id); | |
6445 | LIST_HEAD(reaplist); | |
6446 | ||
6447 | if (!nfsd_netns_ready(nn)) | |
6448 | return count; | |
6449 | ||
6450 | spin_lock(&nn->client_lock); | |
6451 | clp = nfsd_find_client(addr, addr_size); | |
6452 | if (clp) | |
6453 | count = nfsd_find_all_delegations(clp, 0, &reaplist); | |
6454 | spin_unlock(&nn->client_lock); | |
6455 | ||
6456 | nfsd_recall_delegations(&reaplist); | |
269de30f BS |
6457 | return count; |
6458 | } | |
6459 | ||
98d5c7c5 | 6460 | u64 |
285abdee | 6461 | nfsd_inject_recall_delegations(u64 max) |
184c1847 BS |
6462 | { |
6463 | u64 count = 0; | |
98d5c7c5 JL |
6464 | struct nfs4_client *clp, *next; |
6465 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6466 | nfsd_net_id); | |
6467 | LIST_HEAD(reaplist); | |
184c1847 | 6468 | |
98d5c7c5 JL |
6469 | if (!nfsd_netns_ready(nn)) |
6470 | return count; | |
184c1847 | 6471 | |
98d5c7c5 JL |
6472 | spin_lock(&nn->client_lock); |
6473 | list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { | |
6474 | count += nfsd_find_all_delegations(clp, max - count, &reaplist); | |
6475 | if (max != 0 && ++count >= max) | |
6476 | break; | |
6477 | } | |
6478 | spin_unlock(&nn->client_lock); | |
6479 | nfsd_recall_delegations(&reaplist); | |
184c1847 BS |
6480 | return count; |
6481 | } | |
65178db4 BS |
6482 | #endif /* CONFIG_NFSD_FAULT_INJECTION */ |
6483 | ||
c2f1a551 MS |
6484 | /* |
6485 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
6486 | * client may quite reasonably hang on to a delegation as long as it has | |
6487 | * the inode cached. This becomes an obvious problem the first time a | |
6488 | * client's inode cache approaches the size of the server's total memory. | |
6489 | * | |
6490 | * For now we avoid this problem by imposing a hard limit on the number | |
6491 | * of delegations, which varies according to the server's memory size. | |
6492 | */ | |
6493 | static void | |
6494 | set_max_delegations(void) | |
6495 | { | |
6496 | /* | |
6497 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
6498 | * estimates suggest that in the worst case (where every delegation | |
6499 | * is for a different inode), a delegation could take about 1.5K, | |
6500 | * giving a worst case usage of about 6% of memory. | |
6501 | */ | |
6502 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
6503 | } | |
6504 | ||
d85ed443 | 6505 | static int nfs4_state_create_net(struct net *net) |
8daae4dc SK |
6506 | { |
6507 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
6508 | int i; | |
6509 | ||
6510 | nn->conf_id_hashtbl = kmalloc(sizeof(struct list_head) * | |
6511 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
6512 | if (!nn->conf_id_hashtbl) | |
382a62e7 | 6513 | goto err; |
0a7ec377 SK |
6514 | nn->unconf_id_hashtbl = kmalloc(sizeof(struct list_head) * |
6515 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
6516 | if (!nn->unconf_id_hashtbl) | |
6517 | goto err_unconf_id; | |
1872de0e SK |
6518 | nn->sessionid_hashtbl = kmalloc(sizeof(struct list_head) * |
6519 | SESSION_HASH_SIZE, GFP_KERNEL); | |
6520 | if (!nn->sessionid_hashtbl) | |
6521 | goto err_sessionid; | |
8daae4dc | 6522 | |
382a62e7 | 6523 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
8daae4dc | 6524 | INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]); |
0a7ec377 | 6525 | INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]); |
382a62e7 | 6526 | } |
1872de0e SK |
6527 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
6528 | INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]); | |
382a62e7 | 6529 | nn->conf_name_tree = RB_ROOT; |
a99454aa | 6530 | nn->unconf_name_tree = RB_ROOT; |
5ed58bb2 | 6531 | INIT_LIST_HEAD(&nn->client_lru); |
73758fed | 6532 | INIT_LIST_HEAD(&nn->close_lru); |
e8c69d17 | 6533 | INIT_LIST_HEAD(&nn->del_recall_lru); |
c9a49628 | 6534 | spin_lock_init(&nn->client_lock); |
8daae4dc | 6535 | |
09121281 | 6536 | INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main); |
d85ed443 | 6537 | get_net(net); |
09121281 | 6538 | |
8daae4dc | 6539 | return 0; |
382a62e7 | 6540 | |
1872de0e | 6541 | err_sessionid: |
9b531137 | 6542 | kfree(nn->unconf_id_hashtbl); |
0a7ec377 SK |
6543 | err_unconf_id: |
6544 | kfree(nn->conf_id_hashtbl); | |
382a62e7 SK |
6545 | err: |
6546 | return -ENOMEM; | |
8daae4dc SK |
6547 | } |
6548 | ||
6549 | static void | |
4dce0ac9 | 6550 | nfs4_state_destroy_net(struct net *net) |
8daae4dc SK |
6551 | { |
6552 | int i; | |
6553 | struct nfs4_client *clp = NULL; | |
6554 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
6555 | ||
6556 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { | |
6557 | while (!list_empty(&nn->conf_id_hashtbl[i])) { | |
6558 | clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
6559 | destroy_client(clp); | |
6560 | } | |
6561 | } | |
a99454aa | 6562 | |
2b905635 KM |
6563 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
6564 | while (!list_empty(&nn->unconf_id_hashtbl[i])) { | |
6565 | clp = list_entry(nn->unconf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
6566 | destroy_client(clp); | |
6567 | } | |
a99454aa SK |
6568 | } |
6569 | ||
1872de0e | 6570 | kfree(nn->sessionid_hashtbl); |
0a7ec377 | 6571 | kfree(nn->unconf_id_hashtbl); |
8daae4dc | 6572 | kfree(nn->conf_id_hashtbl); |
4dce0ac9 | 6573 | put_net(net); |
8daae4dc SK |
6574 | } |
6575 | ||
f252bc68 | 6576 | int |
d85ed443 | 6577 | nfs4_state_start_net(struct net *net) |
ac4d8ff2 | 6578 | { |
5e1533c7 | 6579 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b5a1a81e BF |
6580 | int ret; |
6581 | ||
d85ed443 | 6582 | ret = nfs4_state_create_net(net); |
8daae4dc SK |
6583 | if (ret) |
6584 | return ret; | |
2c142baa | 6585 | nn->boot_time = get_seconds(); |
a51c84ed | 6586 | nn->grace_ended = false; |
d4318acd JL |
6587 | locks_start_grace(net, &nn->nfsd4_manager); |
6588 | nfsd4_client_tracking_init(net); | |
d85ed443 | 6589 | printk(KERN_INFO "NFSD: starting %ld-second grace period (net %p)\n", |
5284b44e SK |
6590 | nn->nfsd4_grace, net); |
6591 | queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ); | |
d85ed443 SK |
6592 | return 0; |
6593 | } | |
6594 | ||
6595 | /* initialization to perform when the nfsd service is started: */ | |
6596 | ||
6597 | int | |
6598 | nfs4_state_start(void) | |
6599 | { | |
6600 | int ret; | |
6601 | ||
b5a1a81e | 6602 | ret = set_callback_cred(); |
d85ed443 SK |
6603 | if (ret) |
6604 | return -ENOMEM; | |
58da282b | 6605 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
a6d6b781 JL |
6606 | if (laundry_wq == NULL) { |
6607 | ret = -ENOMEM; | |
6608 | goto out_recovery; | |
6609 | } | |
b5a1a81e BF |
6610 | ret = nfsd4_create_callback_queue(); |
6611 | if (ret) | |
6612 | goto out_free_laundry; | |
09121281 | 6613 | |
c2f1a551 | 6614 | set_max_delegations(); |
d85ed443 | 6615 | |
b5a1a81e | 6616 | return 0; |
d85ed443 | 6617 | |
b5a1a81e BF |
6618 | out_free_laundry: |
6619 | destroy_workqueue(laundry_wq); | |
a6d6b781 | 6620 | out_recovery: |
b5a1a81e | 6621 | return ret; |
1da177e4 LT |
6622 | } |
6623 | ||
f252bc68 | 6624 | void |
4dce0ac9 | 6625 | nfs4_state_shutdown_net(struct net *net) |
1da177e4 | 6626 | { |
1da177e4 | 6627 | struct nfs4_delegation *dp = NULL; |
1da177e4 | 6628 | struct list_head *pos, *next, reaplist; |
4dce0ac9 | 6629 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
1da177e4 | 6630 | |
4dce0ac9 SK |
6631 | cancel_delayed_work_sync(&nn->laundromat_work); |
6632 | locks_end_grace(&nn->nfsd4_manager); | |
ac55fdc4 | 6633 | |
1da177e4 | 6634 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 6635 | spin_lock(&state_lock); |
e8c69d17 | 6636 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 | 6637 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
42690676 JL |
6638 | unhash_delegation_locked(dp); |
6639 | list_add(&dp->dl_recall_lru, &reaplist); | |
1da177e4 | 6640 | } |
cdc97505 | 6641 | spin_unlock(&state_lock); |
1da177e4 LT |
6642 | list_for_each_safe(pos, next, &reaplist) { |
6643 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
42690676 | 6644 | list_del_init(&dp->dl_recall_lru); |
8287f009 | 6645 | put_clnt_odstate(dp->dl_clnt_odstate); |
afbda402 | 6646 | nfs4_put_deleg_lease(dp->dl_stid.sc_file); |
6011695d | 6647 | nfs4_put_stid(&dp->dl_stid); |
1da177e4 LT |
6648 | } |
6649 | ||
3320fef1 | 6650 | nfsd4_client_tracking_exit(net); |
4dce0ac9 | 6651 | nfs4_state_destroy_net(net); |
1da177e4 LT |
6652 | } |
6653 | ||
6654 | void | |
6655 | nfs4_state_shutdown(void) | |
6656 | { | |
5e8d5c29 | 6657 | destroy_workqueue(laundry_wq); |
c3935e30 | 6658 | nfsd4_destroy_callback_queue(); |
1da177e4 | 6659 | } |
8b70484c TM |
6660 | |
6661 | static void | |
6662 | get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
6663 | { | |
37c593c5 TM |
6664 | if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) |
6665 | memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); | |
8b70484c TM |
6666 | } |
6667 | ||
6668 | static void | |
6669 | put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
6670 | { | |
37c593c5 TM |
6671 | if (cstate->minorversion) { |
6672 | memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); | |
6673 | SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
6674 | } | |
6675 | } | |
6676 | ||
6677 | void | |
6678 | clear_current_stateid(struct nfsd4_compound_state *cstate) | |
6679 | { | |
6680 | CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
8b70484c TM |
6681 | } |
6682 | ||
62cd4a59 TM |
6683 | /* |
6684 | * functions to set current state id | |
6685 | */ | |
9428fe1a TM |
6686 | void |
6687 | nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
6688 | { | |
6689 | put_stateid(cstate, &odp->od_stateid); | |
6690 | } | |
6691 | ||
8b70484c TM |
6692 | void |
6693 | nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) | |
6694 | { | |
6695 | put_stateid(cstate, &open->op_stateid); | |
6696 | } | |
6697 | ||
62cd4a59 TM |
6698 | void |
6699 | nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
6700 | { | |
6701 | put_stateid(cstate, &close->cl_stateid); | |
6702 | } | |
6703 | ||
6704 | void | |
6705 | nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) | |
6706 | { | |
6707 | put_stateid(cstate, &lock->lk_resp_stateid); | |
6708 | } | |
6709 | ||
6710 | /* | |
6711 | * functions to consume current state id | |
6712 | */ | |
1e97b519 | 6713 | |
9428fe1a TM |
6714 | void |
6715 | nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
6716 | { | |
6717 | get_stateid(cstate, &odp->od_stateid); | |
6718 | } | |
6719 | ||
6720 | void | |
6721 | nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) | |
6722 | { | |
6723 | get_stateid(cstate, &drp->dr_stateid); | |
6724 | } | |
6725 | ||
1e97b519 TM |
6726 | void |
6727 | nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) | |
6728 | { | |
6729 | get_stateid(cstate, &fsp->fr_stateid); | |
6730 | } | |
6731 | ||
6732 | void | |
6733 | nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) | |
6734 | { | |
6735 | get_stateid(cstate, &setattr->sa_stateid); | |
6736 | } | |
6737 | ||
8b70484c TM |
6738 | void |
6739 | nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
6740 | { | |
6741 | get_stateid(cstate, &close->cl_stateid); | |
6742 | } | |
6743 | ||
6744 | void | |
62cd4a59 | 6745 | nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) |
8b70484c | 6746 | { |
62cd4a59 | 6747 | get_stateid(cstate, &locku->lu_stateid); |
8b70484c | 6748 | } |
30813e27 TM |
6749 | |
6750 | void | |
6751 | nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) | |
6752 | { | |
6753 | get_stateid(cstate, &read->rd_stateid); | |
6754 | } | |
6755 | ||
6756 | void | |
6757 | nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) | |
6758 | { | |
6759 | get_stateid(cstate, &write->wr_stateid); | |
6760 | } |