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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (c) 2001 The Regents of the University of Michigan. |
3 | * All rights reserved. | |
4 | * | |
5 | * Kendrick Smith <kmsmith@umich.edu> | |
6 | * Andy Adamson <kandros@umich.edu> | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * | |
12 | * 1. Redistributions of source code must retain the above copyright | |
13 | * notice, this list of conditions and the following disclaimer. | |
14 | * 2. Redistributions in binary form must reproduce the above copyright | |
15 | * notice, this list of conditions and the following disclaimer in the | |
16 | * documentation and/or other materials provided with the distribution. | |
17 | * 3. Neither the name of the University nor the names of its | |
18 | * contributors may be used to endorse or promote products derived | |
19 | * from this software without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
22 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
23 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
24 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
26 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
27 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
28 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
29 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
30 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
31 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
32 | * | |
33 | */ | |
34 | ||
aceaf78d | 35 | #include <linux/file.h> |
b89f4321 | 36 | #include <linux/fs.h> |
5a0e3ad6 | 37 | #include <linux/slab.h> |
0964a3d3 | 38 | #include <linux/namei.h> |
c2f1a551 | 39 | #include <linux/swap.h> |
17456804 | 40 | #include <linux/pagemap.h> |
7df302f7 | 41 | #include <linux/ratelimit.h> |
68e76ad0 | 42 | #include <linux/sunrpc/svcauth_gss.h> |
5976687a | 43 | #include <linux/sunrpc/addr.h> |
87545899 | 44 | #include <linux/jhash.h> |
9a74af21 | 45 | #include "xdr4.h" |
06b332a5 | 46 | #include "xdr4cb.h" |
0a3adade | 47 | #include "vfs.h" |
bfa4b365 | 48 | #include "current_stateid.h" |
1da177e4 | 49 | |
5e1533c7 | 50 | #include "netns.h" |
9cf514cc | 51 | #include "pnfs.h" |
5e1533c7 | 52 | |
1da177e4 LT |
53 | #define NFSDDBG_FACILITY NFSDDBG_PROC |
54 | ||
f32f3c2d BF |
55 | #define all_ones {{~0,~0},~0} |
56 | static const stateid_t one_stateid = { | |
57 | .si_generation = ~0, | |
58 | .si_opaque = all_ones, | |
59 | }; | |
60 | static const stateid_t zero_stateid = { | |
61 | /* all fields zero */ | |
62 | }; | |
19ff0f28 TM |
63 | static const stateid_t currentstateid = { |
64 | .si_generation = 1, | |
65 | }; | |
f32f3c2d | 66 | |
ec6b5d7b | 67 | static u64 current_sessionid = 1; |
fd39ca9a | 68 | |
f32f3c2d BF |
69 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t))) |
70 | #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t))) | |
19ff0f28 | 71 | #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t))) |
1da177e4 | 72 | |
1da177e4 | 73 | /* forward declarations */ |
f9c00c3a | 74 | static bool check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner); |
6011695d | 75 | static void nfs4_free_ol_stateid(struct nfs4_stid *stid); |
1da177e4 | 76 | |
8b671b80 BF |
77 | /* Locking: */ |
78 | ||
8b671b80 BF |
79 | /* |
80 | * Currently used for the del_recall_lru and file hash table. In an | |
81 | * effort to decrease the scope of the client_mutex, this spinlock may | |
82 | * eventually cover more: | |
83 | */ | |
cdc97505 | 84 | static DEFINE_SPINLOCK(state_lock); |
8b671b80 | 85 | |
b401be22 JL |
86 | /* |
87 | * A waitqueue for all in-progress 4.0 CLOSE operations that are waiting for | |
88 | * the refcount on the open stateid to drop. | |
89 | */ | |
90 | static DECLARE_WAIT_QUEUE_HEAD(close_wq); | |
91 | ||
abf1135b CH |
92 | static struct kmem_cache *openowner_slab; |
93 | static struct kmem_cache *lockowner_slab; | |
94 | static struct kmem_cache *file_slab; | |
95 | static struct kmem_cache *stateid_slab; | |
96 | static struct kmem_cache *deleg_slab; | |
8287f009 | 97 | static struct kmem_cache *odstate_slab; |
e60d4398 | 98 | |
66b2b9b2 | 99 | static void free_session(struct nfsd4_session *); |
508dc6e1 | 100 | |
0162ac2b CH |
101 | static struct nfsd4_callback_ops nfsd4_cb_recall_ops; |
102 | ||
f0f51f5c | 103 | static bool is_session_dead(struct nfsd4_session *ses) |
66b2b9b2 | 104 | { |
f0f51f5c | 105 | return ses->se_flags & NFS4_SESSION_DEAD; |
66b2b9b2 BF |
106 | } |
107 | ||
f0f51f5c | 108 | static __be32 mark_session_dead_locked(struct nfsd4_session *ses, int ref_held_by_me) |
508dc6e1 | 109 | { |
f0f51f5c | 110 | if (atomic_read(&ses->se_ref) > ref_held_by_me) |
66b2b9b2 BF |
111 | return nfserr_jukebox; |
112 | ses->se_flags |= NFS4_SESSION_DEAD; | |
113 | return nfs_ok; | |
508dc6e1 BH |
114 | } |
115 | ||
221a6876 BF |
116 | static bool is_client_expired(struct nfs4_client *clp) |
117 | { | |
118 | return clp->cl_time == 0; | |
119 | } | |
120 | ||
221a6876 BF |
121 | static __be32 get_client_locked(struct nfs4_client *clp) |
122 | { | |
0a880a28 TM |
123 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
124 | ||
125 | lockdep_assert_held(&nn->client_lock); | |
126 | ||
221a6876 BF |
127 | if (is_client_expired(clp)) |
128 | return nfserr_expired; | |
129 | atomic_inc(&clp->cl_refcount); | |
130 | return nfs_ok; | |
131 | } | |
132 | ||
133 | /* must be called under the client_lock */ | |
134 | static inline void | |
135 | renew_client_locked(struct nfs4_client *clp) | |
136 | { | |
137 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
138 | ||
139 | if (is_client_expired(clp)) { | |
140 | WARN_ON(1); | |
141 | printk("%s: client (clientid %08x/%08x) already expired\n", | |
142 | __func__, | |
143 | clp->cl_clientid.cl_boot, | |
144 | clp->cl_clientid.cl_id); | |
145 | return; | |
146 | } | |
147 | ||
148 | dprintk("renewing client (clientid %08x/%08x)\n", | |
149 | clp->cl_clientid.cl_boot, | |
150 | clp->cl_clientid.cl_id); | |
151 | list_move_tail(&clp->cl_lru, &nn->client_lru); | |
152 | clp->cl_time = get_seconds(); | |
153 | } | |
154 | ||
ba138435 | 155 | static void put_client_renew_locked(struct nfs4_client *clp) |
221a6876 | 156 | { |
0a880a28 TM |
157 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
158 | ||
159 | lockdep_assert_held(&nn->client_lock); | |
160 | ||
221a6876 BF |
161 | if (!atomic_dec_and_test(&clp->cl_refcount)) |
162 | return; | |
163 | if (!is_client_expired(clp)) | |
164 | renew_client_locked(clp); | |
165 | } | |
166 | ||
4b24ca7d JL |
167 | static void put_client_renew(struct nfs4_client *clp) |
168 | { | |
169 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
170 | ||
d6c249b4 JL |
171 | if (!atomic_dec_and_lock(&clp->cl_refcount, &nn->client_lock)) |
172 | return; | |
173 | if (!is_client_expired(clp)) | |
174 | renew_client_locked(clp); | |
4b24ca7d JL |
175 | spin_unlock(&nn->client_lock); |
176 | } | |
177 | ||
d4e19e70 TM |
178 | static __be32 nfsd4_get_session_locked(struct nfsd4_session *ses) |
179 | { | |
180 | __be32 status; | |
181 | ||
182 | if (is_session_dead(ses)) | |
183 | return nfserr_badsession; | |
184 | status = get_client_locked(ses->se_client); | |
185 | if (status) | |
186 | return status; | |
187 | atomic_inc(&ses->se_ref); | |
188 | return nfs_ok; | |
189 | } | |
190 | ||
191 | static void nfsd4_put_session_locked(struct nfsd4_session *ses) | |
192 | { | |
193 | struct nfs4_client *clp = ses->se_client; | |
0a880a28 TM |
194 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
195 | ||
196 | lockdep_assert_held(&nn->client_lock); | |
d4e19e70 TM |
197 | |
198 | if (atomic_dec_and_test(&ses->se_ref) && is_session_dead(ses)) | |
199 | free_session(ses); | |
200 | put_client_renew_locked(clp); | |
201 | } | |
202 | ||
203 | static void nfsd4_put_session(struct nfsd4_session *ses) | |
204 | { | |
205 | struct nfs4_client *clp = ses->se_client; | |
206 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
207 | ||
208 | spin_lock(&nn->client_lock); | |
209 | nfsd4_put_session_locked(ses); | |
210 | spin_unlock(&nn->client_lock); | |
211 | } | |
212 | ||
b5971afa KM |
213 | static inline struct nfs4_stateowner * |
214 | nfs4_get_stateowner(struct nfs4_stateowner *sop) | |
215 | { | |
216 | atomic_inc(&sop->so_count); | |
217 | return sop; | |
218 | } | |
219 | ||
7ffb5880 | 220 | static int |
d4f0489f | 221 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner) |
7ffb5880 TM |
222 | { |
223 | return (sop->so_owner.len == owner->len) && | |
d4f0489f | 224 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len); |
7ffb5880 TM |
225 | } |
226 | ||
227 | static struct nfs4_openowner * | |
228 | find_openstateowner_str_locked(unsigned int hashval, struct nfsd4_open *open, | |
d4f0489f | 229 | struct nfs4_client *clp) |
7ffb5880 TM |
230 | { |
231 | struct nfs4_stateowner *so; | |
7ffb5880 | 232 | |
d4f0489f | 233 | lockdep_assert_held(&clp->cl_lock); |
7ffb5880 | 234 | |
d4f0489f TM |
235 | list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[hashval], |
236 | so_strhash) { | |
7ffb5880 TM |
237 | if (!so->so_is_open_owner) |
238 | continue; | |
b5971afa KM |
239 | if (same_owner_str(so, &open->op_owner)) |
240 | return openowner(nfs4_get_stateowner(so)); | |
7ffb5880 TM |
241 | } |
242 | return NULL; | |
243 | } | |
244 | ||
245 | static struct nfs4_openowner * | |
246 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, | |
d4f0489f | 247 | struct nfs4_client *clp) |
7ffb5880 TM |
248 | { |
249 | struct nfs4_openowner *oo; | |
250 | ||
d4f0489f TM |
251 | spin_lock(&clp->cl_lock); |
252 | oo = find_openstateowner_str_locked(hashval, open, clp); | |
253 | spin_unlock(&clp->cl_lock); | |
7ffb5880 TM |
254 | return oo; |
255 | } | |
256 | ||
1da177e4 LT |
257 | static inline u32 |
258 | opaque_hashval(const void *ptr, int nbytes) | |
259 | { | |
260 | unsigned char *cptr = (unsigned char *) ptr; | |
261 | ||
262 | u32 x = 0; | |
263 | while (nbytes--) { | |
264 | x *= 37; | |
265 | x += *cptr++; | |
266 | } | |
267 | return x; | |
268 | } | |
269 | ||
5b095e99 | 270 | static void nfsd4_free_file_rcu(struct rcu_head *rcu) |
32513b40 | 271 | { |
5b095e99 JL |
272 | struct nfs4_file *fp = container_of(rcu, struct nfs4_file, fi_rcu); |
273 | ||
274 | kmem_cache_free(file_slab, fp); | |
32513b40 BF |
275 | } |
276 | ||
e6ba76e1 | 277 | void |
13cd2184 N |
278 | put_nfs4_file(struct nfs4_file *fi) |
279 | { | |
02e1215f JL |
280 | might_lock(&state_lock); |
281 | ||
cdc97505 | 282 | if (atomic_dec_and_lock(&fi->fi_ref, &state_lock)) { |
5b095e99 | 283 | hlist_del_rcu(&fi->fi_hash); |
cdc97505 | 284 | spin_unlock(&state_lock); |
8287f009 | 285 | WARN_ON_ONCE(!list_empty(&fi->fi_clnt_odstate)); |
5b095e99 JL |
286 | WARN_ON_ONCE(!list_empty(&fi->fi_delegations)); |
287 | call_rcu(&fi->fi_rcu, nfsd4_free_file_rcu); | |
8b671b80 | 288 | } |
13cd2184 N |
289 | } |
290 | ||
de18643d TM |
291 | static struct file * |
292 | __nfs4_get_fd(struct nfs4_file *f, int oflag) | |
293 | { | |
294 | if (f->fi_fds[oflag]) | |
295 | return get_file(f->fi_fds[oflag]); | |
296 | return NULL; | |
297 | } | |
298 | ||
299 | static struct file * | |
300 | find_writeable_file_locked(struct nfs4_file *f) | |
301 | { | |
302 | struct file *ret; | |
303 | ||
304 | lockdep_assert_held(&f->fi_lock); | |
305 | ||
306 | ret = __nfs4_get_fd(f, O_WRONLY); | |
307 | if (!ret) | |
308 | ret = __nfs4_get_fd(f, O_RDWR); | |
309 | return ret; | |
310 | } | |
311 | ||
312 | static struct file * | |
313 | find_writeable_file(struct nfs4_file *f) | |
314 | { | |
315 | struct file *ret; | |
316 | ||
317 | spin_lock(&f->fi_lock); | |
318 | ret = find_writeable_file_locked(f); | |
319 | spin_unlock(&f->fi_lock); | |
320 | ||
321 | return ret; | |
322 | } | |
323 | ||
324 | static struct file *find_readable_file_locked(struct nfs4_file *f) | |
325 | { | |
326 | struct file *ret; | |
327 | ||
328 | lockdep_assert_held(&f->fi_lock); | |
329 | ||
330 | ret = __nfs4_get_fd(f, O_RDONLY); | |
331 | if (!ret) | |
332 | ret = __nfs4_get_fd(f, O_RDWR); | |
333 | return ret; | |
334 | } | |
335 | ||
336 | static struct file * | |
337 | find_readable_file(struct nfs4_file *f) | |
338 | { | |
339 | struct file *ret; | |
340 | ||
341 | spin_lock(&f->fi_lock); | |
342 | ret = find_readable_file_locked(f); | |
343 | spin_unlock(&f->fi_lock); | |
344 | ||
345 | return ret; | |
346 | } | |
347 | ||
4d227fca | 348 | struct file * |
de18643d TM |
349 | find_any_file(struct nfs4_file *f) |
350 | { | |
351 | struct file *ret; | |
352 | ||
353 | spin_lock(&f->fi_lock); | |
354 | ret = __nfs4_get_fd(f, O_RDWR); | |
355 | if (!ret) { | |
356 | ret = __nfs4_get_fd(f, O_WRONLY); | |
357 | if (!ret) | |
358 | ret = __nfs4_get_fd(f, O_RDONLY); | |
359 | } | |
360 | spin_unlock(&f->fi_lock); | |
361 | return ret; | |
362 | } | |
363 | ||
02a3508d | 364 | static atomic_long_t num_delegations; |
697ce9be | 365 | unsigned long max_delegations; |
ef0f3390 N |
366 | |
367 | /* | |
368 | * Open owner state (share locks) | |
369 | */ | |
370 | ||
16bfdaaf BF |
371 | /* hash tables for lock and open owners */ |
372 | #define OWNER_HASH_BITS 8 | |
373 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
374 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
ef0f3390 | 375 | |
d4f0489f | 376 | static unsigned int ownerstr_hashval(struct xdr_netobj *ownername) |
ddc04c41 BF |
377 | { |
378 | unsigned int ret; | |
379 | ||
380 | ret = opaque_hashval(ownername->data, ownername->len); | |
16bfdaaf | 381 | return ret & OWNER_HASH_MASK; |
ddc04c41 | 382 | } |
ef0f3390 | 383 | |
ef0f3390 N |
384 | /* hash table for nfs4_file */ |
385 | #define FILE_HASH_BITS 8 | |
386 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
35079582 | 387 | |
ca943217 | 388 | static unsigned int nfsd_fh_hashval(struct knfsd_fh *fh) |
ddc04c41 | 389 | { |
ca943217 TM |
390 | return jhash2(fh->fh_base.fh_pad, XDR_QUADLEN(fh->fh_size), 0); |
391 | } | |
392 | ||
393 | static unsigned int file_hashval(struct knfsd_fh *fh) | |
394 | { | |
395 | return nfsd_fh_hashval(fh) & (FILE_HASH_SIZE - 1); | |
396 | } | |
397 | ||
89876f8c | 398 | static struct hlist_head file_hashtbl[FILE_HASH_SIZE]; |
ef0f3390 | 399 | |
12659651 JL |
400 | static void |
401 | __nfs4_file_get_access(struct nfs4_file *fp, u32 access) | |
3477565e | 402 | { |
7214e860 JL |
403 | lockdep_assert_held(&fp->fi_lock); |
404 | ||
12659651 JL |
405 | if (access & NFS4_SHARE_ACCESS_WRITE) |
406 | atomic_inc(&fp->fi_access[O_WRONLY]); | |
407 | if (access & NFS4_SHARE_ACCESS_READ) | |
408 | atomic_inc(&fp->fi_access[O_RDONLY]); | |
3477565e BF |
409 | } |
410 | ||
12659651 JL |
411 | static __be32 |
412 | nfs4_file_get_access(struct nfs4_file *fp, u32 access) | |
998db52c | 413 | { |
7214e860 JL |
414 | lockdep_assert_held(&fp->fi_lock); |
415 | ||
12659651 JL |
416 | /* Does this access mode make sense? */ |
417 | if (access & ~NFS4_SHARE_ACCESS_BOTH) | |
418 | return nfserr_inval; | |
419 | ||
baeb4ff0 JL |
420 | /* Does it conflict with a deny mode already set? */ |
421 | if ((access & fp->fi_share_deny) != 0) | |
422 | return nfserr_share_denied; | |
423 | ||
12659651 JL |
424 | __nfs4_file_get_access(fp, access); |
425 | return nfs_ok; | |
998db52c BF |
426 | } |
427 | ||
baeb4ff0 JL |
428 | static __be32 nfs4_file_check_deny(struct nfs4_file *fp, u32 deny) |
429 | { | |
430 | /* Common case is that there is no deny mode. */ | |
431 | if (deny) { | |
432 | /* Does this deny mode make sense? */ | |
433 | if (deny & ~NFS4_SHARE_DENY_BOTH) | |
434 | return nfserr_inval; | |
435 | ||
436 | if ((deny & NFS4_SHARE_DENY_READ) && | |
437 | atomic_read(&fp->fi_access[O_RDONLY])) | |
438 | return nfserr_share_denied; | |
439 | ||
440 | if ((deny & NFS4_SHARE_DENY_WRITE) && | |
441 | atomic_read(&fp->fi_access[O_WRONLY])) | |
442 | return nfserr_share_denied; | |
443 | } | |
444 | return nfs_ok; | |
445 | } | |
446 | ||
998db52c | 447 | static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
f9d7562f | 448 | { |
de18643d TM |
449 | might_lock(&fp->fi_lock); |
450 | ||
451 | if (atomic_dec_and_lock(&fp->fi_access[oflag], &fp->fi_lock)) { | |
452 | struct file *f1 = NULL; | |
453 | struct file *f2 = NULL; | |
454 | ||
6d338b51 | 455 | swap(f1, fp->fi_fds[oflag]); |
0c7c3e67 | 456 | if (atomic_read(&fp->fi_access[1 - oflag]) == 0) |
6d338b51 | 457 | swap(f2, fp->fi_fds[O_RDWR]); |
de18643d TM |
458 | spin_unlock(&fp->fi_lock); |
459 | if (f1) | |
460 | fput(f1); | |
461 | if (f2) | |
462 | fput(f2); | |
f9d7562f BF |
463 | } |
464 | } | |
465 | ||
12659651 | 466 | static void nfs4_file_put_access(struct nfs4_file *fp, u32 access) |
998db52c | 467 | { |
12659651 JL |
468 | WARN_ON_ONCE(access & ~NFS4_SHARE_ACCESS_BOTH); |
469 | ||
470 | if (access & NFS4_SHARE_ACCESS_WRITE) | |
998db52c | 471 | __nfs4_file_put_access(fp, O_WRONLY); |
12659651 JL |
472 | if (access & NFS4_SHARE_ACCESS_READ) |
473 | __nfs4_file_put_access(fp, O_RDONLY); | |
998db52c BF |
474 | } |
475 | ||
8287f009 SB |
476 | /* |
477 | * Allocate a new open/delegation state counter. This is needed for | |
478 | * pNFS for proper return on close semantics. | |
479 | * | |
480 | * Note that we only allocate it for pNFS-enabled exports, otherwise | |
481 | * all pointers to struct nfs4_clnt_odstate are always NULL. | |
482 | */ | |
483 | static struct nfs4_clnt_odstate * | |
484 | alloc_clnt_odstate(struct nfs4_client *clp) | |
485 | { | |
486 | struct nfs4_clnt_odstate *co; | |
487 | ||
488 | co = kmem_cache_zalloc(odstate_slab, GFP_KERNEL); | |
489 | if (co) { | |
490 | co->co_client = clp; | |
491 | atomic_set(&co->co_odcount, 1); | |
492 | } | |
493 | return co; | |
494 | } | |
495 | ||
496 | static void | |
497 | hash_clnt_odstate_locked(struct nfs4_clnt_odstate *co) | |
498 | { | |
499 | struct nfs4_file *fp = co->co_file; | |
500 | ||
501 | lockdep_assert_held(&fp->fi_lock); | |
502 | list_add(&co->co_perfile, &fp->fi_clnt_odstate); | |
503 | } | |
504 | ||
505 | static inline void | |
506 | get_clnt_odstate(struct nfs4_clnt_odstate *co) | |
507 | { | |
508 | if (co) | |
509 | atomic_inc(&co->co_odcount); | |
510 | } | |
511 | ||
512 | static void | |
513 | put_clnt_odstate(struct nfs4_clnt_odstate *co) | |
514 | { | |
515 | struct nfs4_file *fp; | |
516 | ||
517 | if (!co) | |
518 | return; | |
519 | ||
520 | fp = co->co_file; | |
521 | if (atomic_dec_and_lock(&co->co_odcount, &fp->fi_lock)) { | |
522 | list_del(&co->co_perfile); | |
523 | spin_unlock(&fp->fi_lock); | |
524 | ||
525 | nfsd4_return_all_file_layouts(co->co_client, fp); | |
526 | kmem_cache_free(odstate_slab, co); | |
527 | } | |
528 | } | |
529 | ||
530 | static struct nfs4_clnt_odstate * | |
531 | find_or_hash_clnt_odstate(struct nfs4_file *fp, struct nfs4_clnt_odstate *new) | |
532 | { | |
533 | struct nfs4_clnt_odstate *co; | |
534 | struct nfs4_client *cl; | |
535 | ||
536 | if (!new) | |
537 | return NULL; | |
538 | ||
539 | cl = new->co_client; | |
540 | ||
541 | spin_lock(&fp->fi_lock); | |
542 | list_for_each_entry(co, &fp->fi_clnt_odstate, co_perfile) { | |
543 | if (co->co_client == cl) { | |
544 | get_clnt_odstate(co); | |
545 | goto out; | |
546 | } | |
547 | } | |
548 | co = new; | |
549 | co->co_file = fp; | |
550 | hash_clnt_odstate_locked(new); | |
551 | out: | |
552 | spin_unlock(&fp->fi_lock); | |
553 | return co; | |
554 | } | |
555 | ||
cd61c522 | 556 | struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, |
6011695d | 557 | struct kmem_cache *slab) |
2a74aba7 | 558 | { |
3abdb607 | 559 | struct nfs4_stid *stid; |
6136d2b4 | 560 | int new_id; |
2a74aba7 | 561 | |
f8338834 | 562 | stid = kmem_cache_zalloc(slab, GFP_KERNEL); |
3abdb607 BF |
563 | if (!stid) |
564 | return NULL; | |
565 | ||
4770d722 JL |
566 | idr_preload(GFP_KERNEL); |
567 | spin_lock(&cl->cl_lock); | |
568 | new_id = idr_alloc_cyclic(&cl->cl_stateids, stid, 0, 0, GFP_NOWAIT); | |
569 | spin_unlock(&cl->cl_lock); | |
570 | idr_preload_end(); | |
ebd6c707 | 571 | if (new_id < 0) |
3abdb607 | 572 | goto out_free; |
2a74aba7 | 573 | stid->sc_client = cl; |
3abdb607 BF |
574 | stid->sc_stateid.si_opaque.so_id = new_id; |
575 | stid->sc_stateid.si_opaque.so_clid = cl->cl_clientid; | |
2a74aba7 | 576 | /* Will be incremented before return to client: */ |
72c0b0fb | 577 | atomic_set(&stid->sc_count, 1); |
996e0938 | 578 | |
996e0938 | 579 | /* |
3abdb607 BF |
580 | * It shouldn't be a problem to reuse an opaque stateid value. |
581 | * I don't think it is for 4.1. But with 4.0 I worry that, for | |
582 | * example, a stray write retransmission could be accepted by | |
583 | * the server when it should have been rejected. Therefore, | |
584 | * adopt a trick from the sctp code to attempt to maximize the | |
585 | * amount of time until an id is reused, by ensuring they always | |
586 | * "increase" (mod INT_MAX): | |
996e0938 | 587 | */ |
3abdb607 BF |
588 | return stid; |
589 | out_free: | |
2c44a234 | 590 | kmem_cache_free(slab, stid); |
3abdb607 | 591 | return NULL; |
2a74aba7 BF |
592 | } |
593 | ||
b49e084d | 594 | static struct nfs4_ol_stateid * nfs4_alloc_open_stateid(struct nfs4_client *clp) |
4cdc951b | 595 | { |
6011695d TM |
596 | struct nfs4_stid *stid; |
597 | struct nfs4_ol_stateid *stp; | |
598 | ||
599 | stid = nfs4_alloc_stid(clp, stateid_slab); | |
600 | if (!stid) | |
601 | return NULL; | |
602 | ||
603 | stp = openlockstateid(stid); | |
604 | stp->st_stid.sc_free = nfs4_free_ol_stateid; | |
605 | return stp; | |
606 | } | |
607 | ||
608 | static void nfs4_free_deleg(struct nfs4_stid *stid) | |
609 | { | |
6011695d TM |
610 | kmem_cache_free(deleg_slab, stid); |
611 | atomic_long_dec(&num_delegations); | |
4cdc951b BF |
612 | } |
613 | ||
6282cd56 N |
614 | /* |
615 | * When we recall a delegation, we should be careful not to hand it | |
616 | * out again straight away. | |
617 | * To ensure this we keep a pair of bloom filters ('new' and 'old') | |
618 | * in which the filehandles of recalled delegations are "stored". | |
619 | * If a filehandle appear in either filter, a delegation is blocked. | |
620 | * When a delegation is recalled, the filehandle is stored in the "new" | |
621 | * filter. | |
622 | * Every 30 seconds we swap the filters and clear the "new" one, | |
623 | * unless both are empty of course. | |
624 | * | |
625 | * Each filter is 256 bits. We hash the filehandle to 32bit and use the | |
626 | * low 3 bytes as hash-table indices. | |
627 | * | |
f54fe962 | 628 | * 'blocked_delegations_lock', which is always taken in block_delegations(), |
6282cd56 N |
629 | * is used to manage concurrent access. Testing does not need the lock |
630 | * except when swapping the two filters. | |
631 | */ | |
f54fe962 | 632 | static DEFINE_SPINLOCK(blocked_delegations_lock); |
6282cd56 N |
633 | static struct bloom_pair { |
634 | int entries, old_entries; | |
635 | time_t swap_time; | |
636 | int new; /* index into 'set' */ | |
637 | DECLARE_BITMAP(set[2], 256); | |
638 | } blocked_delegations; | |
639 | ||
640 | static int delegation_blocked(struct knfsd_fh *fh) | |
641 | { | |
642 | u32 hash; | |
643 | struct bloom_pair *bd = &blocked_delegations; | |
644 | ||
645 | if (bd->entries == 0) | |
646 | return 0; | |
647 | if (seconds_since_boot() - bd->swap_time > 30) { | |
f54fe962 | 648 | spin_lock(&blocked_delegations_lock); |
6282cd56 N |
649 | if (seconds_since_boot() - bd->swap_time > 30) { |
650 | bd->entries -= bd->old_entries; | |
651 | bd->old_entries = bd->entries; | |
652 | memset(bd->set[bd->new], 0, | |
653 | sizeof(bd->set[0])); | |
654 | bd->new = 1-bd->new; | |
655 | bd->swap_time = seconds_since_boot(); | |
656 | } | |
f54fe962 | 657 | spin_unlock(&blocked_delegations_lock); |
6282cd56 | 658 | } |
87545899 | 659 | hash = jhash(&fh->fh_base, fh->fh_size, 0); |
6282cd56 N |
660 | if (test_bit(hash&255, bd->set[0]) && |
661 | test_bit((hash>>8)&255, bd->set[0]) && | |
662 | test_bit((hash>>16)&255, bd->set[0])) | |
663 | return 1; | |
664 | ||
665 | if (test_bit(hash&255, bd->set[1]) && | |
666 | test_bit((hash>>8)&255, bd->set[1]) && | |
667 | test_bit((hash>>16)&255, bd->set[1])) | |
668 | return 1; | |
669 | ||
670 | return 0; | |
671 | } | |
672 | ||
673 | static void block_delegations(struct knfsd_fh *fh) | |
674 | { | |
675 | u32 hash; | |
676 | struct bloom_pair *bd = &blocked_delegations; | |
677 | ||
87545899 | 678 | hash = jhash(&fh->fh_base, fh->fh_size, 0); |
6282cd56 | 679 | |
f54fe962 | 680 | spin_lock(&blocked_delegations_lock); |
6282cd56 N |
681 | __set_bit(hash&255, bd->set[bd->new]); |
682 | __set_bit((hash>>8)&255, bd->set[bd->new]); | |
683 | __set_bit((hash>>16)&255, bd->set[bd->new]); | |
684 | if (bd->entries == 0) | |
685 | bd->swap_time = seconds_since_boot(); | |
686 | bd->entries += 1; | |
f54fe962 | 687 | spin_unlock(&blocked_delegations_lock); |
6282cd56 N |
688 | } |
689 | ||
1da177e4 | 690 | static struct nfs4_delegation * |
8287f009 SB |
691 | alloc_init_deleg(struct nfs4_client *clp, struct svc_fh *current_fh, |
692 | struct nfs4_clnt_odstate *odstate) | |
1da177e4 LT |
693 | { |
694 | struct nfs4_delegation *dp; | |
02a3508d | 695 | long n; |
1da177e4 LT |
696 | |
697 | dprintk("NFSD alloc_init_deleg\n"); | |
02a3508d TM |
698 | n = atomic_long_inc_return(&num_delegations); |
699 | if (n < 0 || n > max_delegations) | |
700 | goto out_dec; | |
6282cd56 | 701 | if (delegation_blocked(¤t_fh->fh_handle)) |
02a3508d | 702 | goto out_dec; |
996e0938 | 703 | dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab)); |
5b2d21c1 | 704 | if (dp == NULL) |
02a3508d | 705 | goto out_dec; |
6011695d TM |
706 | |
707 | dp->dl_stid.sc_free = nfs4_free_deleg; | |
2a74aba7 BF |
708 | /* |
709 | * delegation seqid's are never incremented. The 4.1 special | |
6136d2b4 BF |
710 | * meaning of seqid 0 isn't meaningful, really, but let's avoid |
711 | * 0 anyway just for consistency and use 1: | |
2a74aba7 BF |
712 | */ |
713 | dp->dl_stid.sc_stateid.si_generation = 1; | |
ea1da636 N |
714 | INIT_LIST_HEAD(&dp->dl_perfile); |
715 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 | 716 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
8287f009 SB |
717 | dp->dl_clnt_odstate = odstate; |
718 | get_clnt_odstate(odstate); | |
99c41515 | 719 | dp->dl_type = NFS4_OPEN_DELEGATE_READ; |
f0b5de1b CH |
720 | dp->dl_retries = 1; |
721 | nfsd4_init_cb(&dp->dl_recall, dp->dl_stid.sc_client, | |
0162ac2b | 722 | &nfsd4_cb_recall_ops, NFSPROC4_CLNT_CB_RECALL); |
1da177e4 | 723 | return dp; |
02a3508d TM |
724 | out_dec: |
725 | atomic_long_dec(&num_delegations); | |
726 | return NULL; | |
1da177e4 LT |
727 | } |
728 | ||
729 | void | |
6011695d | 730 | nfs4_put_stid(struct nfs4_stid *s) |
1da177e4 | 731 | { |
11b9164a | 732 | struct nfs4_file *fp = s->sc_file; |
6011695d TM |
733 | struct nfs4_client *clp = s->sc_client; |
734 | ||
4770d722 JL |
735 | might_lock(&clp->cl_lock); |
736 | ||
b401be22 JL |
737 | if (!atomic_dec_and_lock(&s->sc_count, &clp->cl_lock)) { |
738 | wake_up_all(&close_wq); | |
6011695d | 739 | return; |
b401be22 | 740 | } |
6011695d | 741 | idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id); |
4770d722 | 742 | spin_unlock(&clp->cl_lock); |
6011695d | 743 | s->sc_free(s); |
11b9164a TM |
744 | if (fp) |
745 | put_nfs4_file(fp); | |
1da177e4 LT |
746 | } |
747 | ||
acfdf5c3 | 748 | static void nfs4_put_deleg_lease(struct nfs4_file *fp) |
1da177e4 | 749 | { |
6bcc034e | 750 | struct file *filp = NULL; |
417c6629 | 751 | |
6bcc034e | 752 | spin_lock(&fp->fi_lock); |
67db1034 | 753 | if (fp->fi_deleg_file && --fp->fi_delegees == 0) |
6bcc034e | 754 | swap(filp, fp->fi_deleg_file); |
6bcc034e JL |
755 | spin_unlock(&fp->fi_lock); |
756 | ||
757 | if (filp) { | |
2ab99ee1 | 758 | vfs_setlease(filp, F_UNLCK, NULL, (void **)&fp); |
6bcc034e | 759 | fput(filp); |
acfdf5c3 | 760 | } |
1da177e4 LT |
761 | } |
762 | ||
cd61c522 | 763 | void nfs4_unhash_stid(struct nfs4_stid *s) |
6136d2b4 | 764 | { |
3abdb607 | 765 | s->sc_type = 0; |
6136d2b4 BF |
766 | } |
767 | ||
931ee56c BH |
768 | static void |
769 | hash_delegation_locked(struct nfs4_delegation *dp, struct nfs4_file *fp) | |
770 | { | |
cdc97505 | 771 | lockdep_assert_held(&state_lock); |
417c6629 | 772 | lockdep_assert_held(&fp->fi_lock); |
931ee56c | 773 | |
67cb1279 | 774 | atomic_inc(&dp->dl_stid.sc_count); |
3fb87d13 | 775 | dp->dl_stid.sc_type = NFS4_DELEG_STID; |
931ee56c BH |
776 | list_add(&dp->dl_perfile, &fp->fi_delegations); |
777 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); | |
778 | } | |
779 | ||
1da177e4 | 780 | static void |
42690676 | 781 | unhash_delegation_locked(struct nfs4_delegation *dp) |
1da177e4 | 782 | { |
11b9164a | 783 | struct nfs4_file *fp = dp->dl_stid.sc_file; |
02e1215f | 784 | |
42690676 JL |
785 | lockdep_assert_held(&state_lock); |
786 | ||
b0fc29d6 | 787 | dp->dl_stid.sc_type = NFS4_CLOSED_DELEG_STID; |
d55a166c JL |
788 | /* Ensure that deleg break won't try to requeue it */ |
789 | ++dp->dl_time; | |
417c6629 | 790 | spin_lock(&fp->fi_lock); |
931ee56c | 791 | list_del_init(&dp->dl_perclnt); |
1da177e4 | 792 | list_del_init(&dp->dl_recall_lru); |
02e1215f JL |
793 | list_del_init(&dp->dl_perfile); |
794 | spin_unlock(&fp->fi_lock); | |
3bd64a5b BF |
795 | } |
796 | ||
3bd64a5b BF |
797 | static void destroy_delegation(struct nfs4_delegation *dp) |
798 | { | |
42690676 JL |
799 | spin_lock(&state_lock); |
800 | unhash_delegation_locked(dp); | |
801 | spin_unlock(&state_lock); | |
8287f009 | 802 | put_clnt_odstate(dp->dl_clnt_odstate); |
afbda402 | 803 | nfs4_put_deleg_lease(dp->dl_stid.sc_file); |
6011695d | 804 | nfs4_put_stid(&dp->dl_stid); |
3bd64a5b BF |
805 | } |
806 | ||
807 | static void revoke_delegation(struct nfs4_delegation *dp) | |
808 | { | |
809 | struct nfs4_client *clp = dp->dl_stid.sc_client; | |
810 | ||
2d4a532d JL |
811 | WARN_ON(!list_empty(&dp->dl_recall_lru)); |
812 | ||
8287f009 | 813 | put_clnt_odstate(dp->dl_clnt_odstate); |
afbda402 JL |
814 | nfs4_put_deleg_lease(dp->dl_stid.sc_file); |
815 | ||
3bd64a5b | 816 | if (clp->cl_minorversion == 0) |
6011695d | 817 | nfs4_put_stid(&dp->dl_stid); |
3bd64a5b | 818 | else { |
3bd64a5b | 819 | dp->dl_stid.sc_type = NFS4_REVOKED_DELEG_STID; |
2d4a532d JL |
820 | spin_lock(&clp->cl_lock); |
821 | list_add(&dp->dl_recall_lru, &clp->cl_revoked); | |
822 | spin_unlock(&clp->cl_lock); | |
3bd64a5b BF |
823 | } |
824 | } | |
825 | ||
1da177e4 LT |
826 | /* |
827 | * SETCLIENTID state | |
828 | */ | |
829 | ||
ddc04c41 BF |
830 | static unsigned int clientid_hashval(u32 id) |
831 | { | |
832 | return id & CLIENT_HASH_MASK; | |
833 | } | |
834 | ||
835 | static unsigned int clientstr_hashval(const char *name) | |
836 | { | |
837 | return opaque_hashval(name, 8) & CLIENT_HASH_MASK; | |
838 | } | |
839 | ||
f9d7562f BF |
840 | /* |
841 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
842 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
843 | * only what share bits are currently in force, but also what | |
844 | * combinations of share bits previous opens have used. This allows us | |
845 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
846 | * return an error if the client attempt to downgrade to a combination | |
847 | * of share bits not explicable by closing some of its previous opens. | |
848 | * | |
849 | * XXX: This enforcement is actually incomplete, since we don't keep | |
850 | * track of access/deny bit combinations; so, e.g., we allow: | |
851 | * | |
852 | * OPEN allow read, deny write | |
853 | * OPEN allow both, deny none | |
854 | * DOWNGRADE allow read, deny none | |
855 | * | |
856 | * which we should reject. | |
857 | */ | |
5ae037e5 JL |
858 | static unsigned int |
859 | bmap_to_share_mode(unsigned long bmap) { | |
f9d7562f | 860 | int i; |
5ae037e5 | 861 | unsigned int access = 0; |
f9d7562f | 862 | |
f9d7562f BF |
863 | for (i = 1; i < 4; i++) { |
864 | if (test_bit(i, &bmap)) | |
5ae037e5 | 865 | access |= i; |
f9d7562f | 866 | } |
5ae037e5 | 867 | return access; |
f9d7562f BF |
868 | } |
869 | ||
82c5ff1b JL |
870 | /* set share access for a given stateid */ |
871 | static inline void | |
872 | set_access(u32 access, struct nfs4_ol_stateid *stp) | |
873 | { | |
c11c591f JL |
874 | unsigned char mask = 1 << access; |
875 | ||
876 | WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH); | |
877 | stp->st_access_bmap |= mask; | |
82c5ff1b JL |
878 | } |
879 | ||
880 | /* clear share access for a given stateid */ | |
881 | static inline void | |
882 | clear_access(u32 access, struct nfs4_ol_stateid *stp) | |
883 | { | |
c11c591f JL |
884 | unsigned char mask = 1 << access; |
885 | ||
886 | WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH); | |
887 | stp->st_access_bmap &= ~mask; | |
82c5ff1b JL |
888 | } |
889 | ||
890 | /* test whether a given stateid has access */ | |
891 | static inline bool | |
892 | test_access(u32 access, struct nfs4_ol_stateid *stp) | |
893 | { | |
c11c591f JL |
894 | unsigned char mask = 1 << access; |
895 | ||
896 | return (bool)(stp->st_access_bmap & mask); | |
82c5ff1b JL |
897 | } |
898 | ||
ce0fc43c JL |
899 | /* set share deny for a given stateid */ |
900 | static inline void | |
c11c591f | 901 | set_deny(u32 deny, struct nfs4_ol_stateid *stp) |
ce0fc43c | 902 | { |
c11c591f JL |
903 | unsigned char mask = 1 << deny; |
904 | ||
905 | WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH); | |
906 | stp->st_deny_bmap |= mask; | |
ce0fc43c JL |
907 | } |
908 | ||
909 | /* clear share deny for a given stateid */ | |
910 | static inline void | |
c11c591f | 911 | clear_deny(u32 deny, struct nfs4_ol_stateid *stp) |
ce0fc43c | 912 | { |
c11c591f JL |
913 | unsigned char mask = 1 << deny; |
914 | ||
915 | WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH); | |
916 | stp->st_deny_bmap &= ~mask; | |
ce0fc43c JL |
917 | } |
918 | ||
919 | /* test whether a given stateid is denying specific access */ | |
920 | static inline bool | |
c11c591f | 921 | test_deny(u32 deny, struct nfs4_ol_stateid *stp) |
ce0fc43c | 922 | { |
c11c591f JL |
923 | unsigned char mask = 1 << deny; |
924 | ||
925 | return (bool)(stp->st_deny_bmap & mask); | |
f9d7562f BF |
926 | } |
927 | ||
928 | static int nfs4_access_to_omode(u32 access) | |
929 | { | |
8f34a430 | 930 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
931 | case NFS4_SHARE_ACCESS_READ: |
932 | return O_RDONLY; | |
933 | case NFS4_SHARE_ACCESS_WRITE: | |
934 | return O_WRONLY; | |
935 | case NFS4_SHARE_ACCESS_BOTH: | |
936 | return O_RDWR; | |
937 | } | |
063b0fb9 BF |
938 | WARN_ON_ONCE(1); |
939 | return O_RDONLY; | |
f9d7562f BF |
940 | } |
941 | ||
baeb4ff0 JL |
942 | /* |
943 | * A stateid that had a deny mode associated with it is being released | |
944 | * or downgraded. Recalculate the deny mode on the file. | |
945 | */ | |
946 | static void | |
947 | recalculate_deny_mode(struct nfs4_file *fp) | |
948 | { | |
949 | struct nfs4_ol_stateid *stp; | |
950 | ||
951 | spin_lock(&fp->fi_lock); | |
952 | fp->fi_share_deny = 0; | |
953 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) | |
954 | fp->fi_share_deny |= bmap_to_share_mode(stp->st_deny_bmap); | |
955 | spin_unlock(&fp->fi_lock); | |
956 | } | |
957 | ||
958 | static void | |
959 | reset_union_bmap_deny(u32 deny, struct nfs4_ol_stateid *stp) | |
960 | { | |
961 | int i; | |
962 | bool change = false; | |
963 | ||
964 | for (i = 1; i < 4; i++) { | |
965 | if ((i & deny) != i) { | |
966 | change = true; | |
967 | clear_deny(i, stp); | |
968 | } | |
969 | } | |
970 | ||
971 | /* Recalculate per-file deny mode if there was a change */ | |
972 | if (change) | |
11b9164a | 973 | recalculate_deny_mode(stp->st_stid.sc_file); |
baeb4ff0 JL |
974 | } |
975 | ||
82c5ff1b JL |
976 | /* release all access and file references for a given stateid */ |
977 | static void | |
978 | release_all_access(struct nfs4_ol_stateid *stp) | |
979 | { | |
980 | int i; | |
11b9164a | 981 | struct nfs4_file *fp = stp->st_stid.sc_file; |
baeb4ff0 JL |
982 | |
983 | if (fp && stp->st_deny_bmap != 0) | |
984 | recalculate_deny_mode(fp); | |
82c5ff1b JL |
985 | |
986 | for (i = 1; i < 4; i++) { | |
987 | if (test_access(i, stp)) | |
11b9164a | 988 | nfs4_file_put_access(stp->st_stid.sc_file, i); |
82c5ff1b JL |
989 | clear_access(i, stp); |
990 | } | |
991 | } | |
992 | ||
d50ffded KM |
993 | static inline void nfs4_free_stateowner(struct nfs4_stateowner *sop) |
994 | { | |
995 | kfree(sop->so_owner.data); | |
996 | sop->so_ops->so_free(sop); | |
997 | } | |
998 | ||
6b180f0b JL |
999 | static void nfs4_put_stateowner(struct nfs4_stateowner *sop) |
1000 | { | |
a819ecc1 JL |
1001 | struct nfs4_client *clp = sop->so_client; |
1002 | ||
1003 | might_lock(&clp->cl_lock); | |
1004 | ||
1005 | if (!atomic_dec_and_lock(&sop->so_count, &clp->cl_lock)) | |
6b180f0b | 1006 | return; |
8f4b54c5 | 1007 | sop->so_ops->so_unhash(sop); |
a819ecc1 | 1008 | spin_unlock(&clp->cl_lock); |
d50ffded | 1009 | nfs4_free_stateowner(sop); |
6b180f0b JL |
1010 | } |
1011 | ||
4ae098d3 | 1012 | static void unhash_ol_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 1013 | { |
11b9164a | 1014 | struct nfs4_file *fp = stp->st_stid.sc_file; |
1d31a253 | 1015 | |
1c755dc1 JL |
1016 | lockdep_assert_held(&stp->st_stateowner->so_client->cl_lock); |
1017 | ||
1d31a253 | 1018 | spin_lock(&fp->fi_lock); |
529d7b2a | 1019 | list_del(&stp->st_perfile); |
1d31a253 | 1020 | spin_unlock(&fp->fi_lock); |
529d7b2a BF |
1021 | list_del(&stp->st_perstateowner); |
1022 | } | |
1023 | ||
6011695d | 1024 | static void nfs4_free_ol_stateid(struct nfs4_stid *stid) |
529d7b2a | 1025 | { |
6011695d | 1026 | struct nfs4_ol_stateid *stp = openlockstateid(stid); |
4665e2ba | 1027 | |
8287f009 | 1028 | put_clnt_odstate(stp->st_clnt_odstate); |
6011695d | 1029 | release_all_access(stp); |
d3134b10 JL |
1030 | if (stp->st_stateowner) |
1031 | nfs4_put_stateowner(stp->st_stateowner); | |
6011695d | 1032 | kmem_cache_free(stateid_slab, stid); |
529d7b2a BF |
1033 | } |
1034 | ||
b49e084d | 1035 | static void nfs4_free_lock_stateid(struct nfs4_stid *stid) |
529d7b2a | 1036 | { |
b49e084d JL |
1037 | struct nfs4_ol_stateid *stp = openlockstateid(stid); |
1038 | struct nfs4_lockowner *lo = lockowner(stp->st_stateowner); | |
529d7b2a BF |
1039 | struct file *file; |
1040 | ||
b49e084d JL |
1041 | file = find_any_file(stp->st_stid.sc_file); |
1042 | if (file) | |
1043 | filp_close(file, (fl_owner_t)lo); | |
1044 | nfs4_free_ol_stateid(stid); | |
1045 | } | |
1046 | ||
2c41beb0 JL |
1047 | /* |
1048 | * Put the persistent reference to an already unhashed generic stateid, while | |
1049 | * holding the cl_lock. If it's the last reference, then put it onto the | |
1050 | * reaplist for later destruction. | |
1051 | */ | |
1052 | static void put_ol_stateid_locked(struct nfs4_ol_stateid *stp, | |
1053 | struct list_head *reaplist) | |
1054 | { | |
1055 | struct nfs4_stid *s = &stp->st_stid; | |
1056 | struct nfs4_client *clp = s->sc_client; | |
1057 | ||
1058 | lockdep_assert_held(&clp->cl_lock); | |
1059 | ||
1060 | WARN_ON_ONCE(!list_empty(&stp->st_locks)); | |
1061 | ||
1062 | if (!atomic_dec_and_test(&s->sc_count)) { | |
1063 | wake_up_all(&close_wq); | |
1064 | return; | |
1065 | } | |
1066 | ||
1067 | idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id); | |
1068 | list_add(&stp->st_locks, reaplist); | |
1069 | } | |
1070 | ||
3c1c995c | 1071 | static void unhash_lock_stateid(struct nfs4_ol_stateid *stp) |
b49e084d | 1072 | { |
1c755dc1 JL |
1073 | struct nfs4_openowner *oo = openowner(stp->st_openstp->st_stateowner); |
1074 | ||
3c1c995c JL |
1075 | lockdep_assert_held(&oo->oo_owner.so_client->cl_lock); |
1076 | ||
1077 | list_del_init(&stp->st_locks); | |
4ae098d3 | 1078 | unhash_ol_stateid(stp); |
cd61c522 | 1079 | nfs4_unhash_stid(&stp->st_stid); |
3c1c995c JL |
1080 | } |
1081 | ||
1082 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) | |
1083 | { | |
1084 | struct nfs4_openowner *oo = openowner(stp->st_openstp->st_stateowner); | |
1085 | ||
1086 | spin_lock(&oo->oo_owner.so_client->cl_lock); | |
1087 | unhash_lock_stateid(stp); | |
1c755dc1 | 1088 | spin_unlock(&oo->oo_owner.so_client->cl_lock); |
6011695d | 1089 | nfs4_put_stid(&stp->st_stid); |
529d7b2a BF |
1090 | } |
1091 | ||
c58c6610 | 1092 | static void unhash_lockowner_locked(struct nfs4_lockowner *lo) |
8f4b54c5 | 1093 | { |
d4f0489f | 1094 | struct nfs4_client *clp = lo->lo_owner.so_client; |
c58c6610 | 1095 | |
d4f0489f | 1096 | lockdep_assert_held(&clp->cl_lock); |
c58c6610 | 1097 | |
8f4b54c5 JL |
1098 | list_del_init(&lo->lo_owner.so_strhash); |
1099 | } | |
1100 | ||
2c41beb0 JL |
1101 | /* |
1102 | * Free a list of generic stateids that were collected earlier after being | |
1103 | * fully unhashed. | |
1104 | */ | |
1105 | static void | |
1106 | free_ol_stateid_reaplist(struct list_head *reaplist) | |
1107 | { | |
1108 | struct nfs4_ol_stateid *stp; | |
fb94d766 | 1109 | struct nfs4_file *fp; |
2c41beb0 JL |
1110 | |
1111 | might_sleep(); | |
1112 | ||
1113 | while (!list_empty(reaplist)) { | |
1114 | stp = list_first_entry(reaplist, struct nfs4_ol_stateid, | |
1115 | st_locks); | |
1116 | list_del(&stp->st_locks); | |
fb94d766 | 1117 | fp = stp->st_stid.sc_file; |
2c41beb0 | 1118 | stp->st_stid.sc_free(&stp->st_stid); |
fb94d766 KM |
1119 | if (fp) |
1120 | put_nfs4_file(fp); | |
2c41beb0 JL |
1121 | } |
1122 | } | |
1123 | ||
3c1c995c | 1124 | static void release_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 1125 | { |
d4f0489f | 1126 | struct nfs4_client *clp = lo->lo_owner.so_client; |
dcef0413 | 1127 | struct nfs4_ol_stateid *stp; |
3c1c995c | 1128 | struct list_head reaplist; |
529d7b2a | 1129 | |
3c1c995c | 1130 | INIT_LIST_HEAD(&reaplist); |
c58c6610 | 1131 | |
3c1c995c JL |
1132 | spin_lock(&clp->cl_lock); |
1133 | unhash_lockowner_locked(lo); | |
fe0750e5 BF |
1134 | while (!list_empty(&lo->lo_owner.so_stateids)) { |
1135 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
dcef0413 | 1136 | struct nfs4_ol_stateid, st_perstateowner); |
3c1c995c | 1137 | unhash_lock_stateid(stp); |
2c41beb0 | 1138 | put_ol_stateid_locked(stp, &reaplist); |
529d7b2a | 1139 | } |
d4f0489f | 1140 | spin_unlock(&clp->cl_lock); |
2c41beb0 | 1141 | free_ol_stateid_reaplist(&reaplist); |
6b180f0b | 1142 | nfs4_put_stateowner(&lo->lo_owner); |
529d7b2a BF |
1143 | } |
1144 | ||
d83017f9 JL |
1145 | static void release_open_stateid_locks(struct nfs4_ol_stateid *open_stp, |
1146 | struct list_head *reaplist) | |
3c87b9b7 TM |
1147 | { |
1148 | struct nfs4_ol_stateid *stp; | |
1149 | ||
1150 | while (!list_empty(&open_stp->st_locks)) { | |
1151 | stp = list_entry(open_stp->st_locks.next, | |
1152 | struct nfs4_ol_stateid, st_locks); | |
d83017f9 JL |
1153 | unhash_lock_stateid(stp); |
1154 | put_ol_stateid_locked(stp, reaplist); | |
529d7b2a BF |
1155 | } |
1156 | } | |
1157 | ||
d83017f9 JL |
1158 | static void unhash_open_stateid(struct nfs4_ol_stateid *stp, |
1159 | struct list_head *reaplist) | |
2283963f | 1160 | { |
2c41beb0 JL |
1161 | lockdep_assert_held(&stp->st_stid.sc_client->cl_lock); |
1162 | ||
4ae098d3 | 1163 | unhash_ol_stateid(stp); |
d83017f9 | 1164 | release_open_stateid_locks(stp, reaplist); |
38c387b5 BF |
1165 | } |
1166 | ||
1167 | static void release_open_stateid(struct nfs4_ol_stateid *stp) | |
1168 | { | |
2c41beb0 JL |
1169 | LIST_HEAD(reaplist); |
1170 | ||
1171 | spin_lock(&stp->st_stid.sc_client->cl_lock); | |
d83017f9 | 1172 | unhash_open_stateid(stp, &reaplist); |
2c41beb0 JL |
1173 | put_ol_stateid_locked(stp, &reaplist); |
1174 | spin_unlock(&stp->st_stid.sc_client->cl_lock); | |
1175 | free_ol_stateid_reaplist(&reaplist); | |
2283963f BF |
1176 | } |
1177 | ||
7ffb5880 | 1178 | static void unhash_openowner_locked(struct nfs4_openowner *oo) |
f1d110ca | 1179 | { |
d4f0489f | 1180 | struct nfs4_client *clp = oo->oo_owner.so_client; |
7ffb5880 | 1181 | |
d4f0489f | 1182 | lockdep_assert_held(&clp->cl_lock); |
7ffb5880 | 1183 | |
8f4b54c5 JL |
1184 | list_del_init(&oo->oo_owner.so_strhash); |
1185 | list_del_init(&oo->oo_perclient); | |
f1d110ca BF |
1186 | } |
1187 | ||
f7a4d872 BF |
1188 | static void release_last_closed_stateid(struct nfs4_openowner *oo) |
1189 | { | |
217526e7 JL |
1190 | struct nfsd_net *nn = net_generic(oo->oo_owner.so_client->net, |
1191 | nfsd_net_id); | |
1192 | struct nfs4_ol_stateid *s; | |
f7a4d872 | 1193 | |
217526e7 JL |
1194 | spin_lock(&nn->client_lock); |
1195 | s = oo->oo_last_closed_stid; | |
f7a4d872 | 1196 | if (s) { |
d3134b10 | 1197 | list_del_init(&oo->oo_close_lru); |
f7a4d872 BF |
1198 | oo->oo_last_closed_stid = NULL; |
1199 | } | |
217526e7 JL |
1200 | spin_unlock(&nn->client_lock); |
1201 | if (s) | |
1202 | nfs4_put_stid(&s->st_stid); | |
f7a4d872 BF |
1203 | } |
1204 | ||
2c41beb0 | 1205 | static void release_openowner(struct nfs4_openowner *oo) |
8f4b54c5 JL |
1206 | { |
1207 | struct nfs4_ol_stateid *stp; | |
d4f0489f | 1208 | struct nfs4_client *clp = oo->oo_owner.so_client; |
2c41beb0 | 1209 | struct list_head reaplist; |
7ffb5880 | 1210 | |
2c41beb0 | 1211 | INIT_LIST_HEAD(&reaplist); |
8f4b54c5 | 1212 | |
2c41beb0 JL |
1213 | spin_lock(&clp->cl_lock); |
1214 | unhash_openowner_locked(oo); | |
8f4b54c5 JL |
1215 | while (!list_empty(&oo->oo_owner.so_stateids)) { |
1216 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
1217 | struct nfs4_ol_stateid, st_perstateowner); | |
d83017f9 | 1218 | unhash_open_stateid(stp, &reaplist); |
2c41beb0 | 1219 | put_ol_stateid_locked(stp, &reaplist); |
8f4b54c5 | 1220 | } |
d4f0489f | 1221 | spin_unlock(&clp->cl_lock); |
2c41beb0 | 1222 | free_ol_stateid_reaplist(&reaplist); |
f7a4d872 | 1223 | release_last_closed_stateid(oo); |
6b180f0b | 1224 | nfs4_put_stateowner(&oo->oo_owner); |
f1d110ca BF |
1225 | } |
1226 | ||
5282fd72 ME |
1227 | static inline int |
1228 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
1229 | { | |
1230 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
1231 | ||
1232 | return sid->sequence % SESSION_HASH_SIZE; | |
1233 | } | |
1234 | ||
135dd002 | 1235 | #ifdef CONFIG_SUNRPC_DEBUG |
5282fd72 ME |
1236 | static inline void |
1237 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
1238 | { | |
1239 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
1240 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
1241 | } | |
8f199b82 TM |
1242 | #else |
1243 | static inline void | |
1244 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
1245 | { | |
1246 | } | |
1247 | #endif | |
1248 | ||
9411b1d4 BF |
1249 | /* |
1250 | * Bump the seqid on cstate->replay_owner, and clear replay_owner if it | |
1251 | * won't be used for replay. | |
1252 | */ | |
1253 | void nfsd4_bump_seqid(struct nfsd4_compound_state *cstate, __be32 nfserr) | |
1254 | { | |
1255 | struct nfs4_stateowner *so = cstate->replay_owner; | |
1256 | ||
1257 | if (nfserr == nfserr_replay_me) | |
1258 | return; | |
1259 | ||
1260 | if (!seqid_mutating_err(ntohl(nfserr))) { | |
58fb12e6 | 1261 | nfsd4_cstate_clear_replay(cstate); |
9411b1d4 BF |
1262 | return; |
1263 | } | |
1264 | if (!so) | |
1265 | return; | |
1266 | if (so->so_is_open_owner) | |
1267 | release_last_closed_stateid(openowner(so)); | |
1268 | so->so_seqid++; | |
1269 | return; | |
1270 | } | |
5282fd72 | 1271 | |
ec6b5d7b AA |
1272 | static void |
1273 | gen_sessionid(struct nfsd4_session *ses) | |
1274 | { | |
1275 | struct nfs4_client *clp = ses->se_client; | |
1276 | struct nfsd4_sessionid *sid; | |
1277 | ||
1278 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
1279 | sid->clientid = clp->cl_clientid; | |
1280 | sid->sequence = current_sessionid++; | |
1281 | sid->reserved = 0; | |
1282 | } | |
1283 | ||
1284 | /* | |
a649637c AA |
1285 | * The protocol defines ca_maxresponssize_cached to include the size of |
1286 | * the rpc header, but all we need to cache is the data starting after | |
1287 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
1288 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
1289 | * value that is the number of bytes in our cache plus a few additional | |
1290 | * bytes. In order to stay on the safe side, and not promise more than | |
1291 | * we can cache, those additional bytes must be the minimum possible: 24 | |
1292 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
1293 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
1294 | * for the SEQUENCE op response: | |
1295 | */ | |
1296 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
1297 | ||
557ce264 AA |
1298 | static void |
1299 | free_session_slots(struct nfsd4_session *ses) | |
1300 | { | |
1301 | int i; | |
1302 | ||
1303 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
1304 | kfree(ses->se_slots[i]); | |
1305 | } | |
1306 | ||
a649637c | 1307 | /* |
efe0cb6d BF |
1308 | * We don't actually need to cache the rpc and session headers, so we |
1309 | * can allocate a little less for each slot: | |
1310 | */ | |
55c760cf | 1311 | static inline u32 slot_bytes(struct nfsd4_channel_attrs *ca) |
efe0cb6d | 1312 | { |
55c760cf | 1313 | u32 size; |
efe0cb6d | 1314 | |
55c760cf BF |
1315 | if (ca->maxresp_cached < NFSD_MIN_HDR_SEQ_SZ) |
1316 | size = 0; | |
1317 | else | |
1318 | size = ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
1319 | return size + sizeof(struct nfsd4_slot); | |
5b6feee9 | 1320 | } |
ec6b5d7b | 1321 | |
5b6feee9 BF |
1322 | /* |
1323 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c | 1324 | * re-negotiate active sessions and reduce their slot usage to make |
42b2aa86 | 1325 | * room for new connections. For now we just fail the create session. |
ec6b5d7b | 1326 | */ |
55c760cf | 1327 | static u32 nfsd4_get_drc_mem(struct nfsd4_channel_attrs *ca) |
ec6b5d7b | 1328 | { |
55c760cf BF |
1329 | u32 slotsize = slot_bytes(ca); |
1330 | u32 num = ca->maxreqs; | |
5b6feee9 | 1331 | int avail; |
ec6b5d7b | 1332 | |
5b6feee9 | 1333 | spin_lock(&nfsd_drc_lock); |
697ce9be ZY |
1334 | avail = min((unsigned long)NFSD_MAX_MEM_PER_SESSION, |
1335 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
5b6feee9 BF |
1336 | num = min_t(int, num, avail / slotsize); |
1337 | nfsd_drc_mem_used += num * slotsize; | |
1338 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 1339 | |
5b6feee9 BF |
1340 | return num; |
1341 | } | |
ec6b5d7b | 1342 | |
55c760cf | 1343 | static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs *ca) |
5b6feee9 | 1344 | { |
55c760cf BF |
1345 | int slotsize = slot_bytes(ca); |
1346 | ||
4bd9b0f4 | 1347 | spin_lock(&nfsd_drc_lock); |
55c760cf | 1348 | nfsd_drc_mem_used -= slotsize * ca->maxreqs; |
4bd9b0f4 | 1349 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 1350 | } |
ec6b5d7b | 1351 | |
60810e54 KM |
1352 | static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fattrs, |
1353 | struct nfsd4_channel_attrs *battrs) | |
5b6feee9 | 1354 | { |
60810e54 KM |
1355 | int numslots = fattrs->maxreqs; |
1356 | int slotsize = slot_bytes(fattrs); | |
5b6feee9 BF |
1357 | struct nfsd4_session *new; |
1358 | int mem, i; | |
a649637c | 1359 | |
5b6feee9 BF |
1360 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
1361 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
1362 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 1363 | |
5b6feee9 BF |
1364 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
1365 | if (!new) | |
1366 | return NULL; | |
557ce264 | 1367 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 | 1368 | for (i = 0; i < numslots; i++) { |
55c760cf | 1369 | new->se_slots[i] = kzalloc(slotsize, GFP_KERNEL); |
5b6feee9 | 1370 | if (!new->se_slots[i]) |
557ce264 | 1371 | goto out_free; |
557ce264 | 1372 | } |
60810e54 KM |
1373 | |
1374 | memcpy(&new->se_fchannel, fattrs, sizeof(struct nfsd4_channel_attrs)); | |
1375 | memcpy(&new->se_bchannel, battrs, sizeof(struct nfsd4_channel_attrs)); | |
1376 | ||
5b6feee9 BF |
1377 | return new; |
1378 | out_free: | |
1379 | while (i--) | |
1380 | kfree(new->se_slots[i]); | |
1381 | kfree(new); | |
1382 | return NULL; | |
ec6b5d7b AA |
1383 | } |
1384 | ||
19cf5c02 BF |
1385 | static void free_conn(struct nfsd4_conn *c) |
1386 | { | |
1387 | svc_xprt_put(c->cn_xprt); | |
1388 | kfree(c); | |
1389 | } | |
ec6b5d7b | 1390 | |
19cf5c02 BF |
1391 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
1392 | { | |
1393 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
1394 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 1395 | |
19cf5c02 BF |
1396 | spin_lock(&clp->cl_lock); |
1397 | if (!list_empty(&c->cn_persession)) { | |
1398 | list_del(&c->cn_persession); | |
1399 | free_conn(c); | |
1400 | } | |
eea49806 | 1401 | nfsd4_probe_callback(clp); |
2e4b7239 | 1402 | spin_unlock(&clp->cl_lock); |
19cf5c02 | 1403 | } |
ec6b5d7b | 1404 | |
d29c374c | 1405 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 1406 | { |
c7662518 | 1407 | struct nfsd4_conn *conn; |
ec6b5d7b | 1408 | |
c7662518 BF |
1409 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
1410 | if (!conn) | |
db90681d | 1411 | return NULL; |
c7662518 BF |
1412 | svc_xprt_get(rqstp->rq_xprt); |
1413 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 1414 | conn->cn_flags = flags; |
db90681d BF |
1415 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
1416 | return conn; | |
1417 | } | |
a649637c | 1418 | |
328ead28 BF |
1419 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
1420 | { | |
1421 | conn->cn_session = ses; | |
1422 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
1423 | } |
1424 | ||
db90681d | 1425 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 1426 | { |
db90681d | 1427 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 1428 | |
c7662518 | 1429 | spin_lock(&clp->cl_lock); |
328ead28 | 1430 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 1431 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
1432 | } |
1433 | ||
21b75b01 | 1434 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 1435 | { |
19cf5c02 | 1436 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 1437 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
1438 | } |
1439 | ||
e1ff371f | 1440 | static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses) |
ec6b5d7b | 1441 | { |
21b75b01 | 1442 | int ret; |
ec6b5d7b | 1443 | |
db90681d | 1444 | nfsd4_hash_conn(conn, ses); |
21b75b01 BF |
1445 | ret = nfsd4_register_conn(conn); |
1446 | if (ret) | |
1447 | /* oops; xprt is already down: */ | |
1448 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
57a37144 BF |
1449 | /* We may have gained or lost a callback channel: */ |
1450 | nfsd4_probe_callback_sync(ses->se_client); | |
c7662518 | 1451 | } |
ec6b5d7b | 1452 | |
e1ff371f | 1453 | static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses) |
1d1bc8f2 BF |
1454 | { |
1455 | u32 dir = NFS4_CDFC4_FORE; | |
1456 | ||
e1ff371f | 1457 | if (cses->flags & SESSION4_BACK_CHAN) |
1d1bc8f2 | 1458 | dir |= NFS4_CDFC4_BACK; |
e1ff371f | 1459 | return alloc_conn(rqstp, dir); |
1d1bc8f2 BF |
1460 | } |
1461 | ||
1462 | /* must be called under client_lock */ | |
19cf5c02 | 1463 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 1464 | { |
19cf5c02 BF |
1465 | struct nfs4_client *clp = s->se_client; |
1466 | struct nfsd4_conn *c; | |
ec6b5d7b | 1467 | |
19cf5c02 BF |
1468 | spin_lock(&clp->cl_lock); |
1469 | while (!list_empty(&s->se_conns)) { | |
1470 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
1471 | list_del_init(&c->cn_persession); | |
1472 | spin_unlock(&clp->cl_lock); | |
557ce264 | 1473 | |
19cf5c02 BF |
1474 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
1475 | free_conn(c); | |
ec6b5d7b | 1476 | |
19cf5c02 BF |
1477 | spin_lock(&clp->cl_lock); |
1478 | } | |
1479 | spin_unlock(&clp->cl_lock); | |
c7662518 | 1480 | } |
ec6b5d7b | 1481 | |
1377b69e BF |
1482 | static void __free_session(struct nfsd4_session *ses) |
1483 | { | |
1377b69e BF |
1484 | free_session_slots(ses); |
1485 | kfree(ses); | |
1486 | } | |
1487 | ||
66b2b9b2 | 1488 | static void free_session(struct nfsd4_session *ses) |
c7662518 | 1489 | { |
19cf5c02 | 1490 | nfsd4_del_conns(ses); |
55c760cf | 1491 | nfsd4_put_drc_mem(&ses->se_fchannel); |
1377b69e | 1492 | __free_session(ses); |
c7662518 BF |
1493 | } |
1494 | ||
135ae827 | 1495 | static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
a827bcb2 | 1496 | { |
a827bcb2 | 1497 | int idx; |
1872de0e | 1498 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
a827bcb2 | 1499 | |
ec6b5d7b AA |
1500 | new->se_client = clp; |
1501 | gen_sessionid(new); | |
ec6b5d7b | 1502 | |
c7662518 BF |
1503 | INIT_LIST_HEAD(&new->se_conns); |
1504 | ||
ac7c46f2 | 1505 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 1506 | new->se_flags = cses->flags; |
8b5ce5cd | 1507 | new->se_cb_prog = cses->callback_prog; |
c6bb3ca2 | 1508 | new->se_cb_sec = cses->cb_sec; |
66b2b9b2 | 1509 | atomic_set(&new->se_ref, 0); |
5b6feee9 | 1510 | idx = hash_sessionid(&new->se_sessionid); |
1872de0e | 1511 | list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]); |
4c649378 | 1512 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 1513 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 1514 | spin_unlock(&clp->cl_lock); |
60810e54 | 1515 | |
b0d2e42c | 1516 | { |
edd76786 | 1517 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
1518 | /* |
1519 | * This is a little silly; with sessions there's no real | |
1520 | * use for the callback address. Use the peer address | |
1521 | * as a reasonable default for now, but consider fixing | |
1522 | * the rpc client not to require an address in the | |
1523 | * future: | |
1524 | */ | |
edd76786 BF |
1525 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
1526 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 1527 | } |
ec6b5d7b AA |
1528 | } |
1529 | ||
9089f1b4 | 1530 | /* caller must hold client_lock */ |
5282fd72 | 1531 | static struct nfsd4_session * |
d4e19e70 | 1532 | __find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net) |
5282fd72 ME |
1533 | { |
1534 | struct nfsd4_session *elem; | |
1535 | int idx; | |
1872de0e | 1536 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
5282fd72 | 1537 | |
0a880a28 TM |
1538 | lockdep_assert_held(&nn->client_lock); |
1539 | ||
5282fd72 ME |
1540 | dump_sessionid(__func__, sessionid); |
1541 | idx = hash_sessionid(sessionid); | |
5282fd72 | 1542 | /* Search in the appropriate list */ |
1872de0e | 1543 | list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) { |
5282fd72 ME |
1544 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
1545 | NFS4_MAX_SESSIONID_LEN)) { | |
1546 | return elem; | |
1547 | } | |
1548 | } | |
1549 | ||
1550 | dprintk("%s: session not found\n", __func__); | |
1551 | return NULL; | |
1552 | } | |
1553 | ||
d4e19e70 TM |
1554 | static struct nfsd4_session * |
1555 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net, | |
1556 | __be32 *ret) | |
1557 | { | |
1558 | struct nfsd4_session *session; | |
1559 | __be32 status = nfserr_badsession; | |
1560 | ||
1561 | session = __find_in_sessionid_hashtbl(sessionid, net); | |
1562 | if (!session) | |
1563 | goto out; | |
1564 | status = nfsd4_get_session_locked(session); | |
1565 | if (status) | |
1566 | session = NULL; | |
1567 | out: | |
1568 | *ret = status; | |
1569 | return session; | |
1570 | } | |
1571 | ||
9089f1b4 | 1572 | /* caller must hold client_lock */ |
7116ed6b | 1573 | static void |
5282fd72 | 1574 | unhash_session(struct nfsd4_session *ses) |
7116ed6b | 1575 | { |
0a880a28 TM |
1576 | struct nfs4_client *clp = ses->se_client; |
1577 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
1578 | ||
1579 | lockdep_assert_held(&nn->client_lock); | |
1580 | ||
7116ed6b | 1581 | list_del(&ses->se_hash); |
4c649378 | 1582 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 1583 | list_del(&ses->se_perclnt); |
4c649378 | 1584 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
1585 | } |
1586 | ||
1da177e4 LT |
1587 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
1588 | static int | |
2c142baa | 1589 | STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn) |
1da177e4 | 1590 | { |
bbc7f33a BF |
1591 | /* |
1592 | * We're assuming the clid was not given out from a boot | |
1593 | * precisely 2^32 (about 136 years) before this one. That seems | |
1594 | * a safe assumption: | |
1595 | */ | |
1596 | if (clid->cl_boot == (u32)nn->boot_time) | |
1da177e4 | 1597 | return 0; |
60adfc50 | 1598 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
2c142baa | 1599 | clid->cl_boot, clid->cl_id, nn->boot_time); |
1da177e4 LT |
1600 | return 1; |
1601 | } | |
1602 | ||
1603 | /* | |
1604 | * XXX Should we use a slab cache ? | |
1605 | * This type of memory management is somewhat inefficient, but we use it | |
1606 | * anyway since SETCLIENTID is not a common operation. | |
1607 | */ | |
35bba9a3 | 1608 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
1609 | { |
1610 | struct nfs4_client *clp; | |
d4f0489f | 1611 | int i; |
1da177e4 | 1612 | |
35bba9a3 BF |
1613 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
1614 | if (clp == NULL) | |
1615 | return NULL; | |
67114fe6 | 1616 | clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); |
d4f0489f TM |
1617 | if (clp->cl_name.data == NULL) |
1618 | goto err_no_name; | |
1619 | clp->cl_ownerstr_hashtbl = kmalloc(sizeof(struct list_head) * | |
1620 | OWNER_HASH_SIZE, GFP_KERNEL); | |
1621 | if (!clp->cl_ownerstr_hashtbl) | |
1622 | goto err_no_hashtbl; | |
1623 | for (i = 0; i < OWNER_HASH_SIZE; i++) | |
1624 | INIT_LIST_HEAD(&clp->cl_ownerstr_hashtbl[i]); | |
35bba9a3 | 1625 | clp->cl_name.len = name.len; |
5694c93e TM |
1626 | INIT_LIST_HEAD(&clp->cl_sessions); |
1627 | idr_init(&clp->cl_stateids); | |
1628 | atomic_set(&clp->cl_refcount, 0); | |
1629 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; | |
1630 | INIT_LIST_HEAD(&clp->cl_idhash); | |
1631 | INIT_LIST_HEAD(&clp->cl_openowners); | |
1632 | INIT_LIST_HEAD(&clp->cl_delegations); | |
1633 | INIT_LIST_HEAD(&clp->cl_lru); | |
5694c93e | 1634 | INIT_LIST_HEAD(&clp->cl_revoked); |
9cf514cc CH |
1635 | #ifdef CONFIG_NFSD_PNFS |
1636 | INIT_LIST_HEAD(&clp->cl_lo_states); | |
1637 | #endif | |
5694c93e TM |
1638 | spin_lock_init(&clp->cl_lock); |
1639 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1da177e4 | 1640 | return clp; |
d4f0489f TM |
1641 | err_no_hashtbl: |
1642 | kfree(clp->cl_name.data); | |
1643 | err_no_name: | |
1644 | kfree(clp); | |
1645 | return NULL; | |
1da177e4 LT |
1646 | } |
1647 | ||
4dd86e15 | 1648 | static void |
1da177e4 LT |
1649 | free_client(struct nfs4_client *clp) |
1650 | { | |
792c95dd BF |
1651 | while (!list_empty(&clp->cl_sessions)) { |
1652 | struct nfsd4_session *ses; | |
1653 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
1654 | se_perclnt); | |
1655 | list_del(&ses->se_perclnt); | |
66b2b9b2 BF |
1656 | WARN_ON_ONCE(atomic_read(&ses->se_ref)); |
1657 | free_session(ses); | |
792c95dd | 1658 | } |
4cb57e30 | 1659 | rpc_destroy_wait_queue(&clp->cl_cb_waitq); |
03a4e1f6 | 1660 | free_svc_cred(&clp->cl_cred); |
d4f0489f | 1661 | kfree(clp->cl_ownerstr_hashtbl); |
1da177e4 | 1662 | kfree(clp->cl_name.data); |
2d32b29a | 1663 | idr_destroy(&clp->cl_stateids); |
1da177e4 LT |
1664 | kfree(clp); |
1665 | } | |
1666 | ||
84d38ac9 | 1667 | /* must be called under the client_lock */ |
4beb345b | 1668 | static void |
84d38ac9 BH |
1669 | unhash_client_locked(struct nfs4_client *clp) |
1670 | { | |
4beb345b | 1671 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
792c95dd BF |
1672 | struct nfsd4_session *ses; |
1673 | ||
0a880a28 TM |
1674 | lockdep_assert_held(&nn->client_lock); |
1675 | ||
4beb345b TM |
1676 | /* Mark the client as expired! */ |
1677 | clp->cl_time = 0; | |
1678 | /* Make it invisible */ | |
1679 | if (!list_empty(&clp->cl_idhash)) { | |
1680 | list_del_init(&clp->cl_idhash); | |
1681 | if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) | |
1682 | rb_erase(&clp->cl_namenode, &nn->conf_name_tree); | |
1683 | else | |
1684 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); | |
1685 | } | |
1686 | list_del_init(&clp->cl_lru); | |
4c649378 | 1687 | spin_lock(&clp->cl_lock); |
792c95dd BF |
1688 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
1689 | list_del_init(&ses->se_hash); | |
4c649378 | 1690 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
1691 | } |
1692 | ||
1da177e4 | 1693 | static void |
4beb345b TM |
1694 | unhash_client(struct nfs4_client *clp) |
1695 | { | |
1696 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
1697 | ||
1698 | spin_lock(&nn->client_lock); | |
1699 | unhash_client_locked(clp); | |
1700 | spin_unlock(&nn->client_lock); | |
1701 | } | |
1702 | ||
97403d95 JL |
1703 | static __be32 mark_client_expired_locked(struct nfs4_client *clp) |
1704 | { | |
1705 | if (atomic_read(&clp->cl_refcount)) | |
1706 | return nfserr_jukebox; | |
1707 | unhash_client_locked(clp); | |
1708 | return nfs_ok; | |
1709 | } | |
1710 | ||
4beb345b TM |
1711 | static void |
1712 | __destroy_client(struct nfs4_client *clp) | |
1da177e4 | 1713 | { |
fe0750e5 | 1714 | struct nfs4_openowner *oo; |
1da177e4 | 1715 | struct nfs4_delegation *dp; |
1da177e4 LT |
1716 | struct list_head reaplist; |
1717 | ||
1da177e4 | 1718 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 1719 | spin_lock(&state_lock); |
ea1da636 N |
1720 | while (!list_empty(&clp->cl_delegations)) { |
1721 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
42690676 JL |
1722 | unhash_delegation_locked(dp); |
1723 | list_add(&dp->dl_recall_lru, &reaplist); | |
1da177e4 | 1724 | } |
cdc97505 | 1725 | spin_unlock(&state_lock); |
1da177e4 LT |
1726 | while (!list_empty(&reaplist)) { |
1727 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
42690676 | 1728 | list_del_init(&dp->dl_recall_lru); |
8287f009 | 1729 | put_clnt_odstate(dp->dl_clnt_odstate); |
afbda402 | 1730 | nfs4_put_deleg_lease(dp->dl_stid.sc_file); |
6011695d | 1731 | nfs4_put_stid(&dp->dl_stid); |
1da177e4 | 1732 | } |
2d4a532d | 1733 | while (!list_empty(&clp->cl_revoked)) { |
c876486b | 1734 | dp = list_entry(clp->cl_revoked.next, struct nfs4_delegation, dl_recall_lru); |
2d4a532d | 1735 | list_del_init(&dp->dl_recall_lru); |
6011695d | 1736 | nfs4_put_stid(&dp->dl_stid); |
956c4fee | 1737 | } |
ea1da636 | 1738 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 | 1739 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
b5971afa | 1740 | nfs4_get_stateowner(&oo->oo_owner); |
fe0750e5 | 1741 | release_openowner(oo); |
1da177e4 | 1742 | } |
9cf514cc | 1743 | nfsd4_return_all_client_layouts(clp); |
6ff8da08 | 1744 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
1745 | if (clp->cl_cb_conn.cb_xprt) |
1746 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
221a6876 | 1747 | free_client(clp); |
1da177e4 LT |
1748 | } |
1749 | ||
4beb345b TM |
1750 | static void |
1751 | destroy_client(struct nfs4_client *clp) | |
1752 | { | |
1753 | unhash_client(clp); | |
1754 | __destroy_client(clp); | |
1755 | } | |
1756 | ||
0d22f68f BF |
1757 | static void expire_client(struct nfs4_client *clp) |
1758 | { | |
4beb345b | 1759 | unhash_client(clp); |
0d22f68f | 1760 | nfsd4_client_record_remove(clp); |
4beb345b | 1761 | __destroy_client(clp); |
0d22f68f BF |
1762 | } |
1763 | ||
35bba9a3 BF |
1764 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
1765 | { | |
1766 | memcpy(target->cl_verifier.data, source->data, | |
1767 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
1768 | } |
1769 | ||
35bba9a3 BF |
1770 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
1771 | { | |
1da177e4 LT |
1772 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
1773 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
1774 | } | |
1775 | ||
03a4e1f6 | 1776 | static int copy_cred(struct svc_cred *target, struct svc_cred *source) |
35bba9a3 | 1777 | { |
03a4e1f6 BF |
1778 | if (source->cr_principal) { |
1779 | target->cr_principal = | |
1780 | kstrdup(source->cr_principal, GFP_KERNEL); | |
1781 | if (target->cr_principal == NULL) | |
1782 | return -ENOMEM; | |
1783 | } else | |
1784 | target->cr_principal = NULL; | |
d5497fc6 | 1785 | target->cr_flavor = source->cr_flavor; |
1da177e4 LT |
1786 | target->cr_uid = source->cr_uid; |
1787 | target->cr_gid = source->cr_gid; | |
1788 | target->cr_group_info = source->cr_group_info; | |
1789 | get_group_info(target->cr_group_info); | |
0dc1531a BF |
1790 | target->cr_gss_mech = source->cr_gss_mech; |
1791 | if (source->cr_gss_mech) | |
1792 | gss_mech_get(source->cr_gss_mech); | |
03a4e1f6 | 1793 | return 0; |
1da177e4 LT |
1794 | } |
1795 | ||
ef17af2a | 1796 | static int |
ac55fdc4 JL |
1797 | compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2) |
1798 | { | |
ef17af2a RV |
1799 | if (o1->len < o2->len) |
1800 | return -1; | |
1801 | if (o1->len > o2->len) | |
1802 | return 1; | |
1803 | return memcmp(o1->data, o2->data, o1->len); | |
ac55fdc4 JL |
1804 | } |
1805 | ||
35bba9a3 | 1806 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 1807 | { |
a55370a3 | 1808 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
1809 | } |
1810 | ||
1811 | static int | |
599e0a22 BF |
1812 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1813 | { | |
1814 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
1815 | } |
1816 | ||
1817 | static int | |
599e0a22 BF |
1818 | same_clid(clientid_t *cl1, clientid_t *cl2) |
1819 | { | |
1820 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1821 | } |
1822 | ||
8fbba96e BF |
1823 | static bool groups_equal(struct group_info *g1, struct group_info *g2) |
1824 | { | |
1825 | int i; | |
1826 | ||
1827 | if (g1->ngroups != g2->ngroups) | |
1828 | return false; | |
1829 | for (i=0; i<g1->ngroups; i++) | |
6fab8779 | 1830 | if (!gid_eq(GROUP_AT(g1, i), GROUP_AT(g2, i))) |
8fbba96e BF |
1831 | return false; |
1832 | return true; | |
1833 | } | |
1834 | ||
68eb3508 BF |
1835 | /* |
1836 | * RFC 3530 language requires clid_inuse be returned when the | |
1837 | * "principal" associated with a requests differs from that previously | |
1838 | * used. We use uid, gid's, and gss principal string as our best | |
1839 | * approximation. We also don't want to allow non-gss use of a client | |
1840 | * established using gss: in theory cr_principal should catch that | |
1841 | * change, but in practice cr_principal can be null even in the gss case | |
1842 | * since gssd doesn't always pass down a principal string. | |
1843 | */ | |
1844 | static bool is_gss_cred(struct svc_cred *cr) | |
1845 | { | |
1846 | /* Is cr_flavor one of the gss "pseudoflavors"?: */ | |
1847 | return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR); | |
1848 | } | |
1849 | ||
1850 | ||
5559b50a | 1851 | static bool |
599e0a22 BF |
1852 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
1853 | { | |
68eb3508 | 1854 | if ((is_gss_cred(cr1) != is_gss_cred(cr2)) |
6fab8779 EB |
1855 | || (!uid_eq(cr1->cr_uid, cr2->cr_uid)) |
1856 | || (!gid_eq(cr1->cr_gid, cr2->cr_gid)) | |
8fbba96e BF |
1857 | || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) |
1858 | return false; | |
1859 | if (cr1->cr_principal == cr2->cr_principal) | |
1860 | return true; | |
1861 | if (!cr1->cr_principal || !cr2->cr_principal) | |
1862 | return false; | |
5559b50a | 1863 | return 0 == strcmp(cr1->cr_principal, cr2->cr_principal); |
1da177e4 LT |
1864 | } |
1865 | ||
57266a6e BF |
1866 | static bool svc_rqst_integrity_protected(struct svc_rqst *rqstp) |
1867 | { | |
1868 | struct svc_cred *cr = &rqstp->rq_cred; | |
1869 | u32 service; | |
1870 | ||
c4720591 BF |
1871 | if (!cr->cr_gss_mech) |
1872 | return false; | |
57266a6e BF |
1873 | service = gss_pseudoflavor_to_service(cr->cr_gss_mech, cr->cr_flavor); |
1874 | return service == RPC_GSS_SVC_INTEGRITY || | |
1875 | service == RPC_GSS_SVC_PRIVACY; | |
1876 | } | |
1877 | ||
1878 | static bool mach_creds_match(struct nfs4_client *cl, struct svc_rqst *rqstp) | |
1879 | { | |
1880 | struct svc_cred *cr = &rqstp->rq_cred; | |
1881 | ||
1882 | if (!cl->cl_mach_cred) | |
1883 | return true; | |
1884 | if (cl->cl_cred.cr_gss_mech != cr->cr_gss_mech) | |
1885 | return false; | |
1886 | if (!svc_rqst_integrity_protected(rqstp)) | |
1887 | return false; | |
1888 | if (!cr->cr_principal) | |
1889 | return false; | |
1890 | return 0 == strcmp(cl->cl_cred.cr_principal, cr->cr_principal); | |
1891 | } | |
1892 | ||
294ac32e | 1893 | static void gen_confirm(struct nfs4_client *clp, struct nfsd_net *nn) |
deda2faa | 1894 | { |
ab4684d1 | 1895 | __be32 verf[2]; |
1da177e4 | 1896 | |
f419992c JL |
1897 | /* |
1898 | * This is opaque to client, so no need to byte-swap. Use | |
1899 | * __force to keep sparse happy | |
1900 | */ | |
1901 | verf[0] = (__force __be32)get_seconds(); | |
19311aa8 | 1902 | verf[1] = (__force __be32)nn->clverifier_counter++; |
ab4684d1 | 1903 | memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); |
1da177e4 LT |
1904 | } |
1905 | ||
294ac32e JL |
1906 | static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn) |
1907 | { | |
1908 | clp->cl_clientid.cl_boot = nn->boot_time; | |
1909 | clp->cl_clientid.cl_id = nn->clientid_counter++; | |
1910 | gen_confirm(clp, nn); | |
1911 | } | |
1912 | ||
4770d722 JL |
1913 | static struct nfs4_stid * |
1914 | find_stateid_locked(struct nfs4_client *cl, stateid_t *t) | |
4581d140 | 1915 | { |
3abdb607 BF |
1916 | struct nfs4_stid *ret; |
1917 | ||
1918 | ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id); | |
1919 | if (!ret || !ret->sc_type) | |
1920 | return NULL; | |
1921 | return ret; | |
4d71ab87 BF |
1922 | } |
1923 | ||
4770d722 JL |
1924 | static struct nfs4_stid * |
1925 | find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) | |
f459e453 BF |
1926 | { |
1927 | struct nfs4_stid *s; | |
4d71ab87 | 1928 | |
4770d722 JL |
1929 | spin_lock(&cl->cl_lock); |
1930 | s = find_stateid_locked(cl, t); | |
2d3f9668 TM |
1931 | if (s != NULL) { |
1932 | if (typemask & s->sc_type) | |
1933 | atomic_inc(&s->sc_count); | |
1934 | else | |
1935 | s = NULL; | |
1936 | } | |
4770d722 JL |
1937 | spin_unlock(&cl->cl_lock); |
1938 | return s; | |
4581d140 BF |
1939 | } |
1940 | ||
2216d449 | 1941 | static struct nfs4_client *create_client(struct xdr_netobj name, |
b09333c4 RL |
1942 | struct svc_rqst *rqstp, nfs4_verifier *verf) |
1943 | { | |
1944 | struct nfs4_client *clp; | |
1945 | struct sockaddr *sa = svc_addr(rqstp); | |
03a4e1f6 | 1946 | int ret; |
c212cecf | 1947 | struct net *net = SVC_NET(rqstp); |
b09333c4 RL |
1948 | |
1949 | clp = alloc_client(name); | |
1950 | if (clp == NULL) | |
1951 | return NULL; | |
1952 | ||
03a4e1f6 BF |
1953 | ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); |
1954 | if (ret) { | |
03a4e1f6 | 1955 | free_client(clp); |
03a4e1f6 | 1956 | return NULL; |
b09333c4 | 1957 | } |
0162ac2b | 1958 | nfsd4_init_cb(&clp->cl_cb_null, clp, NULL, NFSPROC4_CLNT_CB_NULL); |
07cd4909 | 1959 | clp->cl_time = get_seconds(); |
b09333c4 | 1960 | clear_bit(0, &clp->cl_cb_slot_busy); |
b09333c4 RL |
1961 | copy_verf(clp, verf); |
1962 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
edd76786 | 1963 | clp->cl_cb_session = NULL; |
c212cecf | 1964 | clp->net = net; |
b09333c4 RL |
1965 | return clp; |
1966 | } | |
1967 | ||
fd39ca9a | 1968 | static void |
ac55fdc4 JL |
1969 | add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root) |
1970 | { | |
1971 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
1972 | struct nfs4_client *clp; | |
1973 | ||
1974 | while (*new) { | |
1975 | clp = rb_entry(*new, struct nfs4_client, cl_namenode); | |
1976 | parent = *new; | |
1977 | ||
1978 | if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0) | |
1979 | new = &((*new)->rb_left); | |
1980 | else | |
1981 | new = &((*new)->rb_right); | |
1982 | } | |
1983 | ||
1984 | rb_link_node(&new_clp->cl_namenode, parent, new); | |
1985 | rb_insert_color(&new_clp->cl_namenode, root); | |
1986 | } | |
1987 | ||
1988 | static struct nfs4_client * | |
1989 | find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root) | |
1990 | { | |
ef17af2a | 1991 | int cmp; |
ac55fdc4 JL |
1992 | struct rb_node *node = root->rb_node; |
1993 | struct nfs4_client *clp; | |
1994 | ||
1995 | while (node) { | |
1996 | clp = rb_entry(node, struct nfs4_client, cl_namenode); | |
1997 | cmp = compare_blob(&clp->cl_name, name); | |
1998 | if (cmp > 0) | |
1999 | node = node->rb_left; | |
2000 | else if (cmp < 0) | |
2001 | node = node->rb_right; | |
2002 | else | |
2003 | return clp; | |
2004 | } | |
2005 | return NULL; | |
2006 | } | |
2007 | ||
2008 | static void | |
2009 | add_to_unconfirmed(struct nfs4_client *clp) | |
1da177e4 LT |
2010 | { |
2011 | unsigned int idhashval; | |
0a7ec377 | 2012 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 2013 | |
0a880a28 TM |
2014 | lockdep_assert_held(&nn->client_lock); |
2015 | ||
ac55fdc4 | 2016 | clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
a99454aa | 2017 | add_clp_to_name_tree(clp, &nn->unconf_name_tree); |
1da177e4 | 2018 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
0a7ec377 | 2019 | list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]); |
3dbacee6 | 2020 | renew_client_locked(clp); |
1da177e4 LT |
2021 | } |
2022 | ||
fd39ca9a | 2023 | static void |
1da177e4 LT |
2024 | move_to_confirmed(struct nfs4_client *clp) |
2025 | { | |
2026 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
8daae4dc | 2027 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 2028 | |
0a880a28 TM |
2029 | lockdep_assert_held(&nn->client_lock); |
2030 | ||
1da177e4 | 2031 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); |
8daae4dc | 2032 | list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]); |
a99454aa | 2033 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
382a62e7 | 2034 | add_clp_to_name_tree(clp, &nn->conf_name_tree); |
ac55fdc4 | 2035 | set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
3dbacee6 | 2036 | renew_client_locked(clp); |
1da177e4 LT |
2037 | } |
2038 | ||
2039 | static struct nfs4_client * | |
bfa85e83 | 2040 | find_client_in_id_table(struct list_head *tbl, clientid_t *clid, bool sessions) |
1da177e4 LT |
2041 | { |
2042 | struct nfs4_client *clp; | |
2043 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
2044 | ||
bfa85e83 | 2045 | list_for_each_entry(clp, &tbl[idhashval], cl_idhash) { |
a50d2ad1 | 2046 | if (same_clid(&clp->cl_clientid, clid)) { |
d15c077e BF |
2047 | if ((bool)clp->cl_minorversion != sessions) |
2048 | return NULL; | |
3dbacee6 | 2049 | renew_client_locked(clp); |
1da177e4 | 2050 | return clp; |
a50d2ad1 | 2051 | } |
1da177e4 LT |
2052 | } |
2053 | return NULL; | |
2054 | } | |
2055 | ||
bfa85e83 BF |
2056 | static struct nfs4_client * |
2057 | find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) | |
2058 | { | |
2059 | struct list_head *tbl = nn->conf_id_hashtbl; | |
2060 | ||
0a880a28 | 2061 | lockdep_assert_held(&nn->client_lock); |
bfa85e83 BF |
2062 | return find_client_in_id_table(tbl, clid, sessions); |
2063 | } | |
2064 | ||
1da177e4 | 2065 | static struct nfs4_client * |
0a7ec377 | 2066 | find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
1da177e4 | 2067 | { |
bfa85e83 | 2068 | struct list_head *tbl = nn->unconf_id_hashtbl; |
1da177e4 | 2069 | |
0a880a28 | 2070 | lockdep_assert_held(&nn->client_lock); |
bfa85e83 | 2071 | return find_client_in_id_table(tbl, clid, sessions); |
1da177e4 LT |
2072 | } |
2073 | ||
6e5f15c9 | 2074 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 2075 | { |
6e5f15c9 | 2076 | return clp->cl_exchange_flags != 0; |
e203d506 | 2077 | } |
a1bcecd2 | 2078 | |
28ce6054 | 2079 | static struct nfs4_client * |
382a62e7 | 2080 | find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 2081 | { |
0a880a28 | 2082 | lockdep_assert_held(&nn->client_lock); |
382a62e7 | 2083 | return find_clp_in_name_tree(name, &nn->conf_name_tree); |
28ce6054 N |
2084 | } |
2085 | ||
2086 | static struct nfs4_client * | |
a99454aa | 2087 | find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 2088 | { |
0a880a28 | 2089 | lockdep_assert_held(&nn->client_lock); |
a99454aa | 2090 | return find_clp_in_name_tree(name, &nn->unconf_name_tree); |
28ce6054 N |
2091 | } |
2092 | ||
fd39ca9a | 2093 | static void |
6f3d772f | 2094 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 2095 | { |
07263f1e | 2096 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
2097 | struct sockaddr *sa = svc_addr(rqstp); |
2098 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
2099 | unsigned short expected_family; |
2100 | ||
2101 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
2102 | if (se->se_callback_netid_len == 3 && | |
2103 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
2104 | expected_family = AF_INET; | |
2105 | else if (se->se_callback_netid_len == 4 && | |
2106 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
2107 | expected_family = AF_INET6; | |
2108 | else | |
1da177e4 LT |
2109 | goto out_err; |
2110 | ||
c212cecf | 2111 | conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val, |
aa9a4ec7 | 2112 | se->se_callback_addr_len, |
07263f1e BF |
2113 | (struct sockaddr *)&conn->cb_addr, |
2114 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 2115 | |
07263f1e | 2116 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 2117 | goto out_err; |
aa9a4ec7 | 2118 | |
07263f1e BF |
2119 | if (conn->cb_addr.ss_family == AF_INET6) |
2120 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 2121 | |
07263f1e BF |
2122 | conn->cb_prog = se->se_callback_prog; |
2123 | conn->cb_ident = se->se_callback_ident; | |
849a1cf1 | 2124 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
1da177e4 LT |
2125 | return; |
2126 | out_err: | |
07263f1e BF |
2127 | conn->cb_addr.ss_family = AF_UNSPEC; |
2128 | conn->cb_addrlen = 0; | |
849823c5 | 2129 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
2130 | "will not receive delegations\n", |
2131 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
2132 | ||
1da177e4 LT |
2133 | return; |
2134 | } | |
2135 | ||
074fe897 | 2136 | /* |
067e1ace | 2137 | * Cache a reply. nfsd4_check_resp_size() has bounded the cache size. |
074fe897 | 2138 | */ |
b607664e | 2139 | static void |
074fe897 | 2140 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) |
074fe897 | 2141 | { |
f5236013 | 2142 | struct xdr_buf *buf = resp->xdr.buf; |
557ce264 AA |
2143 | struct nfsd4_slot *slot = resp->cstate.slot; |
2144 | unsigned int base; | |
074fe897 | 2145 | |
557ce264 | 2146 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 2147 | |
557ce264 AA |
2148 | slot->sl_opcnt = resp->opcnt; |
2149 | slot->sl_status = resp->cstate.status; | |
074fe897 | 2150 | |
bf5c43c8 | 2151 | slot->sl_flags |= NFSD4_SLOT_INITIALIZED; |
bf864a31 | 2152 | if (nfsd4_not_cached(resp)) { |
557ce264 | 2153 | slot->sl_datalen = 0; |
bf864a31 | 2154 | return; |
074fe897 | 2155 | } |
f5236013 BF |
2156 | base = resp->cstate.data_offset; |
2157 | slot->sl_datalen = buf->len - base; | |
2158 | if (read_bytes_from_xdr_buf(buf, base, slot->sl_data, slot->sl_datalen)) | |
557ce264 AA |
2159 | WARN("%s: sessions DRC could not cache compound\n", __func__); |
2160 | return; | |
074fe897 AA |
2161 | } |
2162 | ||
2163 | /* | |
abfabf8c AA |
2164 | * Encode the replay sequence operation from the slot values. |
2165 | * If cachethis is FALSE encode the uncached rep error on the next | |
2166 | * operation which sets resp->p and increments resp->opcnt for | |
2167 | * nfs4svc_encode_compoundres. | |
074fe897 | 2168 | * |
074fe897 | 2169 | */ |
abfabf8c AA |
2170 | static __be32 |
2171 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
2172 | struct nfsd4_compoundres *resp) | |
074fe897 | 2173 | { |
abfabf8c AA |
2174 | struct nfsd4_op *op; |
2175 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 2176 | |
abfabf8c AA |
2177 | /* Encode the replayed sequence operation */ |
2178 | op = &args->ops[resp->opcnt - 1]; | |
2179 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 2180 | |
abfabf8c | 2181 | /* Return nfserr_retry_uncached_rep in next operation. */ |
73e79482 | 2182 | if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) { |
abfabf8c AA |
2183 | op = &args->ops[resp->opcnt++]; |
2184 | op->status = nfserr_retry_uncached_rep; | |
2185 | nfsd4_encode_operation(resp, op); | |
074fe897 | 2186 | } |
abfabf8c | 2187 | return op->status; |
074fe897 AA |
2188 | } |
2189 | ||
2190 | /* | |
557ce264 AA |
2191 | * The sequence operation is not cached because we can use the slot and |
2192 | * session values. | |
074fe897 | 2193 | */ |
3ca2eb98 | 2194 | static __be32 |
bf864a31 AA |
2195 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
2196 | struct nfsd4_sequence *seq) | |
074fe897 | 2197 | { |
557ce264 | 2198 | struct nfsd4_slot *slot = resp->cstate.slot; |
f5236013 BF |
2199 | struct xdr_stream *xdr = &resp->xdr; |
2200 | __be32 *p; | |
074fe897 AA |
2201 | __be32 status; |
2202 | ||
557ce264 | 2203 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 2204 | |
abfabf8c | 2205 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); |
0da7b19c | 2206 | if (status) |
abfabf8c | 2207 | return status; |
074fe897 | 2208 | |
f5236013 BF |
2209 | p = xdr_reserve_space(xdr, slot->sl_datalen); |
2210 | if (!p) { | |
2211 | WARN_ON_ONCE(1); | |
2212 | return nfserr_serverfault; | |
2213 | } | |
2214 | xdr_encode_opaque_fixed(p, slot->sl_data, slot->sl_datalen); | |
2215 | xdr_commit_encode(xdr); | |
074fe897 | 2216 | |
557ce264 | 2217 | resp->opcnt = slot->sl_opcnt; |
f5236013 | 2218 | return slot->sl_status; |
074fe897 AA |
2219 | } |
2220 | ||
0733d213 AA |
2221 | /* |
2222 | * Set the exchange_id flags returned by the server. | |
2223 | */ | |
2224 | static void | |
2225 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
2226 | { | |
9cf514cc CH |
2227 | #ifdef CONFIG_NFSD_PNFS |
2228 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_PNFS_MDS; | |
2229 | #else | |
0733d213 | 2230 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; |
9cf514cc | 2231 | #endif |
0733d213 AA |
2232 | |
2233 | /* Referrals are supported, Migration is not. */ | |
2234 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
2235 | ||
2236 | /* set the wire flags to return to client. */ | |
2237 | clid->flags = new->cl_exchange_flags; | |
2238 | } | |
2239 | ||
631fc9ea BF |
2240 | static bool client_has_state(struct nfs4_client *clp) |
2241 | { | |
2242 | /* | |
2243 | * Note clp->cl_openowners check isn't quite right: there's no | |
2244 | * need to count owners without stateid's. | |
2245 | * | |
2246 | * Also note we should probably be using this in 4.0 case too. | |
2247 | */ | |
6eccece9 | 2248 | return !list_empty(&clp->cl_openowners) |
47e970be KM |
2249 | #ifdef CONFIG_NFSD_PNFS |
2250 | || !list_empty(&clp->cl_lo_states) | |
2251 | #endif | |
6eccece9 BF |
2252 | || !list_empty(&clp->cl_delegations) |
2253 | || !list_empty(&clp->cl_sessions); | |
631fc9ea BF |
2254 | } |
2255 | ||
069b6ad4 AA |
2256 | __be32 |
2257 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
2258 | struct nfsd4_compound_state *cstate, | |
2259 | struct nfsd4_exchange_id *exid) | |
2260 | { | |
3dbacee6 TM |
2261 | struct nfs4_client *conf, *new; |
2262 | struct nfs4_client *unconf = NULL; | |
57b7b43b | 2263 | __be32 status; |
363168b4 | 2264 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 2265 | nfs4_verifier verf = exid->verifier; |
363168b4 | 2266 | struct sockaddr *sa = svc_addr(rqstp); |
83e08fd4 | 2267 | bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; |
c212cecf | 2268 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
0733d213 | 2269 | |
363168b4 | 2270 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 2271 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 2272 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 2273 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 2274 | addr_str, exid->flags, exid->spa_how); |
0733d213 | 2275 | |
a084daf5 | 2276 | if (exid->flags & ~EXCHGID4_FLAG_MASK_A) |
0733d213 AA |
2277 | return nfserr_inval; |
2278 | ||
0733d213 | 2279 | switch (exid->spa_how) { |
57266a6e BF |
2280 | case SP4_MACH_CRED: |
2281 | if (!svc_rqst_integrity_protected(rqstp)) | |
2282 | return nfserr_inval; | |
0733d213 AA |
2283 | case SP4_NONE: |
2284 | break; | |
063b0fb9 BF |
2285 | default: /* checked by xdr code */ |
2286 | WARN_ON_ONCE(1); | |
0733d213 | 2287 | case SP4_SSV: |
dd30333c | 2288 | return nfserr_encr_alg_unsupp; |
0733d213 AA |
2289 | } |
2290 | ||
5cc40fd7 TM |
2291 | new = create_client(exid->clname, rqstp, &verf); |
2292 | if (new == NULL) | |
2293 | return nfserr_jukebox; | |
2294 | ||
2dbb269d | 2295 | /* Cases below refer to rfc 5661 section 18.35.4: */ |
3dbacee6 | 2296 | spin_lock(&nn->client_lock); |
382a62e7 | 2297 | conf = find_confirmed_client_by_name(&exid->clname, nn); |
0733d213 | 2298 | if (conf) { |
83e08fd4 BF |
2299 | bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); |
2300 | bool verfs_match = same_verf(&verf, &conf->cl_verifier); | |
2301 | ||
136e658d BF |
2302 | if (update) { |
2303 | if (!clp_used_exchangeid(conf)) { /* buggy client */ | |
2dbb269d | 2304 | status = nfserr_inval; |
1a308118 BF |
2305 | goto out; |
2306 | } | |
57266a6e BF |
2307 | if (!mach_creds_match(conf, rqstp)) { |
2308 | status = nfserr_wrong_cred; | |
2309 | goto out; | |
2310 | } | |
136e658d | 2311 | if (!creds_match) { /* case 9 */ |
ea236d07 | 2312 | status = nfserr_perm; |
136e658d BF |
2313 | goto out; |
2314 | } | |
2315 | if (!verfs_match) { /* case 8 */ | |
0733d213 AA |
2316 | status = nfserr_not_same; |
2317 | goto out; | |
2318 | } | |
136e658d BF |
2319 | /* case 6 */ |
2320 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
136e658d | 2321 | goto out_copy; |
0733d213 | 2322 | } |
136e658d | 2323 | if (!creds_match) { /* case 3 */ |
631fc9ea BF |
2324 | if (client_has_state(conf)) { |
2325 | status = nfserr_clid_inuse; | |
0733d213 AA |
2326 | goto out; |
2327 | } | |
0733d213 AA |
2328 | goto out_new; |
2329 | } | |
136e658d | 2330 | if (verfs_match) { /* case 2 */ |
0f1ba0ef | 2331 | conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; |
136e658d BF |
2332 | goto out_copy; |
2333 | } | |
2334 | /* case 5, client reboot */ | |
3dbacee6 | 2335 | conf = NULL; |
136e658d | 2336 | goto out_new; |
6ddbbbfe MS |
2337 | } |
2338 | ||
2dbb269d | 2339 | if (update) { /* case 7 */ |
6ddbbbfe MS |
2340 | status = nfserr_noent; |
2341 | goto out; | |
0733d213 AA |
2342 | } |
2343 | ||
a99454aa | 2344 | unconf = find_unconfirmed_client_by_name(&exid->clname, nn); |
2dbb269d | 2345 | if (unconf) /* case 4, possible retry or client restart */ |
3dbacee6 | 2346 | unhash_client_locked(unconf); |
0733d213 | 2347 | |
2dbb269d | 2348 | /* case 1 (normal case) */ |
0733d213 | 2349 | out_new: |
fd699b8a JL |
2350 | if (conf) { |
2351 | status = mark_client_expired_locked(conf); | |
2352 | if (status) | |
2353 | goto out; | |
2354 | } | |
4f540e29 | 2355 | new->cl_minorversion = cstate->minorversion; |
57266a6e | 2356 | new->cl_mach_cred = (exid->spa_how == SP4_MACH_CRED); |
0733d213 | 2357 | |
c212cecf | 2358 | gen_clid(new, nn); |
ac55fdc4 | 2359 | add_to_unconfirmed(new); |
3dbacee6 | 2360 | swap(new, conf); |
0733d213 | 2361 | out_copy: |
5cc40fd7 TM |
2362 | exid->clientid.cl_boot = conf->cl_clientid.cl_boot; |
2363 | exid->clientid.cl_id = conf->cl_clientid.cl_id; | |
0733d213 | 2364 | |
5cc40fd7 TM |
2365 | exid->seqid = conf->cl_cs_slot.sl_seqid + 1; |
2366 | nfsd4_set_ex_flags(conf, exid); | |
0733d213 AA |
2367 | |
2368 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
5cc40fd7 | 2369 | conf->cl_cs_slot.sl_seqid, conf->cl_exchange_flags); |
0733d213 AA |
2370 | status = nfs_ok; |
2371 | ||
2372 | out: | |
3dbacee6 | 2373 | spin_unlock(&nn->client_lock); |
5cc40fd7 | 2374 | if (new) |
3dbacee6 TM |
2375 | expire_client(new); |
2376 | if (unconf) | |
2377 | expire_client(unconf); | |
0733d213 | 2378 | return status; |
069b6ad4 AA |
2379 | } |
2380 | ||
57b7b43b | 2381 | static __be32 |
88e588d5 | 2382 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 2383 | { |
88e588d5 AA |
2384 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
2385 | slot_seqid); | |
b85d4c01 BH |
2386 | |
2387 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
2388 | if (slot_inuse) { |
2389 | if (seqid == slot_seqid) | |
b85d4c01 BH |
2390 | return nfserr_jukebox; |
2391 | else | |
2392 | return nfserr_seq_misordered; | |
2393 | } | |
f6d82485 | 2394 | /* Note unsigned 32-bit arithmetic handles wraparound: */ |
88e588d5 | 2395 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 | 2396 | return nfs_ok; |
88e588d5 | 2397 | if (seqid == slot_seqid) |
b85d4c01 | 2398 | return nfserr_replay_cache; |
b85d4c01 BH |
2399 | return nfserr_seq_misordered; |
2400 | } | |
2401 | ||
49557cc7 AA |
2402 | /* |
2403 | * Cache the create session result into the create session single DRC | |
2404 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
2405 | * Do this for solo or embedded create session operations. | |
2406 | */ | |
2407 | static void | |
2408 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
57b7b43b | 2409 | struct nfsd4_clid_slot *slot, __be32 nfserr) |
49557cc7 AA |
2410 | { |
2411 | slot->sl_status = nfserr; | |
2412 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
2413 | } | |
2414 | ||
2415 | static __be32 | |
2416 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
2417 | struct nfsd4_clid_slot *slot) | |
2418 | { | |
2419 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
2420 | return slot->sl_status; | |
2421 | } | |
2422 | ||
1b74c25b MJ |
2423 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
2424 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
2425 | 1 + /* MIN tag is length with zero, only length */ \ | |
2426 | 3 + /* version, opcount, opcode */ \ | |
2427 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
2428 | /* seqid, slotID, slotID, cache */ \ | |
2429 | 4 ) * sizeof(__be32)) | |
2430 | ||
2431 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
2432 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
2433 | 1 + /* status */ \ | |
2434 | 1 + /* MIN tag is length with zero, only length */ \ | |
2435 | 3 + /* opcount, opcode, opstatus*/ \ | |
2436 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
2437 | /* seqid, slotID, slotID, slotID, status */ \ | |
2438 | 5 ) * sizeof(__be32)) | |
2439 | ||
55c760cf | 2440 | static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs *ca, struct nfsd_net *nn) |
1b74c25b | 2441 | { |
55c760cf BF |
2442 | u32 maxrpc = nn->nfsd_serv->sv_max_mesg; |
2443 | ||
373cd409 BF |
2444 | if (ca->maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ) |
2445 | return nfserr_toosmall; | |
2446 | if (ca->maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ) | |
2447 | return nfserr_toosmall; | |
55c760cf BF |
2448 | ca->headerpadsz = 0; |
2449 | ca->maxreq_sz = min_t(u32, ca->maxreq_sz, maxrpc); | |
2450 | ca->maxresp_sz = min_t(u32, ca->maxresp_sz, maxrpc); | |
2451 | ca->maxops = min_t(u32, ca->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
2452 | ca->maxresp_cached = min_t(u32, ca->maxresp_cached, | |
2453 | NFSD_SLOT_CACHE_SIZE + NFSD_MIN_HDR_SEQ_SZ); | |
2454 | ca->maxreqs = min_t(u32, ca->maxreqs, NFSD_MAX_SLOTS_PER_SESSION); | |
2455 | /* | |
2456 | * Note decreasing slot size below client's request may make it | |
2457 | * difficult for client to function correctly, whereas | |
2458 | * decreasing the number of slots will (just?) affect | |
2459 | * performance. When short on memory we therefore prefer to | |
2460 | * decrease number of slots instead of their size. Clients that | |
2461 | * request larger slots than they need will get poor results: | |
2462 | */ | |
2463 | ca->maxreqs = nfsd4_get_drc_mem(ca); | |
2464 | if (!ca->maxreqs) | |
2465 | return nfserr_jukebox; | |
2466 | ||
373cd409 | 2467 | return nfs_ok; |
1b74c25b MJ |
2468 | } |
2469 | ||
8a891633 KM |
2470 | #define NFSD_CB_MAX_REQ_SZ ((NFS4_enc_cb_recall_sz + \ |
2471 | RPC_MAX_HEADER_WITH_AUTH) * sizeof(__be32)) | |
2472 | #define NFSD_CB_MAX_RESP_SZ ((NFS4_dec_cb_recall_sz + \ | |
2473 | RPC_MAX_REPHEADER_WITH_AUTH) * sizeof(__be32)) | |
2474 | ||
06b332a5 | 2475 | static __be32 check_backchannel_attrs(struct nfsd4_channel_attrs *ca) |
1b74c25b | 2476 | { |
06b332a5 BF |
2477 | ca->headerpadsz = 0; |
2478 | ||
2479 | /* | |
2480 | * These RPC_MAX_HEADER macros are overkill, especially since we | |
2481 | * don't even do gss on the backchannel yet. But this is still | |
2482 | * less than 1k. Tighten up this estimate in the unlikely event | |
2483 | * it turns out to be a problem for some client: | |
2484 | */ | |
8a891633 | 2485 | if (ca->maxreq_sz < NFSD_CB_MAX_REQ_SZ) |
06b332a5 | 2486 | return nfserr_toosmall; |
8a891633 | 2487 | if (ca->maxresp_sz < NFSD_CB_MAX_RESP_SZ) |
06b332a5 BF |
2488 | return nfserr_toosmall; |
2489 | ca->maxresp_cached = 0; | |
2490 | if (ca->maxops < 2) | |
2491 | return nfserr_toosmall; | |
2492 | ||
2493 | return nfs_ok; | |
1b74c25b MJ |
2494 | } |
2495 | ||
b78724b7 BF |
2496 | static __be32 nfsd4_check_cb_sec(struct nfsd4_cb_sec *cbs) |
2497 | { | |
2498 | switch (cbs->flavor) { | |
2499 | case RPC_AUTH_NULL: | |
2500 | case RPC_AUTH_UNIX: | |
2501 | return nfs_ok; | |
2502 | default: | |
2503 | /* | |
2504 | * GSS case: the spec doesn't allow us to return this | |
2505 | * error. But it also doesn't allow us not to support | |
2506 | * GSS. | |
2507 | * I'd rather this fail hard than return some error the | |
2508 | * client might think it can already handle: | |
2509 | */ | |
2510 | return nfserr_encr_alg_unsupp; | |
2511 | } | |
2512 | } | |
2513 | ||
069b6ad4 AA |
2514 | __be32 |
2515 | nfsd4_create_session(struct svc_rqst *rqstp, | |
2516 | struct nfsd4_compound_state *cstate, | |
2517 | struct nfsd4_create_session *cr_ses) | |
2518 | { | |
363168b4 | 2519 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 2520 | struct nfs4_client *conf, *unconf; |
d20c11d8 | 2521 | struct nfs4_client *old = NULL; |
ac7c46f2 | 2522 | struct nfsd4_session *new; |
81f0b2a4 | 2523 | struct nfsd4_conn *conn; |
49557cc7 | 2524 | struct nfsd4_clid_slot *cs_slot = NULL; |
57b7b43b | 2525 | __be32 status = 0; |
8daae4dc | 2526 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
ec6b5d7b | 2527 | |
a62573dc MJ |
2528 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
2529 | return nfserr_inval; | |
b78724b7 BF |
2530 | status = nfsd4_check_cb_sec(&cr_ses->cb_sec); |
2531 | if (status) | |
2532 | return status; | |
55c760cf | 2533 | status = check_forechannel_attrs(&cr_ses->fore_channel, nn); |
06b332a5 BF |
2534 | if (status) |
2535 | return status; | |
2536 | status = check_backchannel_attrs(&cr_ses->back_channel); | |
373cd409 | 2537 | if (status) |
f403e450 | 2538 | goto out_release_drc_mem; |
81f0b2a4 | 2539 | status = nfserr_jukebox; |
60810e54 | 2540 | new = alloc_session(&cr_ses->fore_channel, &cr_ses->back_channel); |
55c760cf BF |
2541 | if (!new) |
2542 | goto out_release_drc_mem; | |
81f0b2a4 BF |
2543 | conn = alloc_conn_from_crses(rqstp, cr_ses); |
2544 | if (!conn) | |
2545 | goto out_free_session; | |
a62573dc | 2546 | |
d20c11d8 | 2547 | spin_lock(&nn->client_lock); |
0a7ec377 | 2548 | unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn); |
8daae4dc | 2549 | conf = find_confirmed_client(&cr_ses->clientid, true, nn); |
78389046 | 2550 | WARN_ON_ONCE(conf && unconf); |
ec6b5d7b AA |
2551 | |
2552 | if (conf) { | |
57266a6e BF |
2553 | status = nfserr_wrong_cred; |
2554 | if (!mach_creds_match(conf, rqstp)) | |
2555 | goto out_free_conn; | |
49557cc7 AA |
2556 | cs_slot = &conf->cl_cs_slot; |
2557 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 2558 | if (status == nfserr_replay_cache) { |
49557cc7 | 2559 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
81f0b2a4 | 2560 | goto out_free_conn; |
49557cc7 | 2561 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b | 2562 | status = nfserr_seq_misordered; |
81f0b2a4 | 2563 | goto out_free_conn; |
ec6b5d7b | 2564 | } |
ec6b5d7b AA |
2565 | } else if (unconf) { |
2566 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || | |
363168b4 | 2567 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b | 2568 | status = nfserr_clid_inuse; |
81f0b2a4 | 2569 | goto out_free_conn; |
ec6b5d7b | 2570 | } |
57266a6e BF |
2571 | status = nfserr_wrong_cred; |
2572 | if (!mach_creds_match(unconf, rqstp)) | |
2573 | goto out_free_conn; | |
49557cc7 AA |
2574 | cs_slot = &unconf->cl_cs_slot; |
2575 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
2576 | if (status) { |
2577 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 2578 | status = nfserr_seq_misordered; |
81f0b2a4 | 2579 | goto out_free_conn; |
ec6b5d7b | 2580 | } |
382a62e7 | 2581 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
221a6876 | 2582 | if (old) { |
d20c11d8 | 2583 | status = mark_client_expired_locked(old); |
7abea1e8 JL |
2584 | if (status) { |
2585 | old = NULL; | |
221a6876 | 2586 | goto out_free_conn; |
7abea1e8 | 2587 | } |
221a6876 | 2588 | } |
8f9d3d3b | 2589 | move_to_confirmed(unconf); |
ec6b5d7b AA |
2590 | conf = unconf; |
2591 | } else { | |
2592 | status = nfserr_stale_clientid; | |
81f0b2a4 | 2593 | goto out_free_conn; |
ec6b5d7b | 2594 | } |
81f0b2a4 | 2595 | status = nfs_ok; |
408b79bc BF |
2596 | /* |
2597 | * We do not support RDMA or persistent sessions | |
2598 | */ | |
2599 | cr_ses->flags &= ~SESSION4_PERSIST; | |
2600 | cr_ses->flags &= ~SESSION4_RDMA; | |
2601 | ||
81f0b2a4 | 2602 | init_session(rqstp, new, conf, cr_ses); |
d20c11d8 | 2603 | nfsd4_get_session_locked(new); |
81f0b2a4 | 2604 | |
ac7c46f2 | 2605 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, |
ec6b5d7b | 2606 | NFS4_MAX_SESSIONID_LEN); |
86c3e16c | 2607 | cs_slot->sl_seqid++; |
49557cc7 | 2608 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 2609 | |
d20c11d8 | 2610 | /* cache solo and embedded create sessions under the client_lock */ |
49557cc7 | 2611 | nfsd4_cache_create_session(cr_ses, cs_slot, status); |
d20c11d8 JL |
2612 | spin_unlock(&nn->client_lock); |
2613 | /* init connection and backchannel */ | |
2614 | nfsd4_init_conn(rqstp, conn, new); | |
2615 | nfsd4_put_session(new); | |
d20c11d8 JL |
2616 | if (old) |
2617 | expire_client(old); | |
ec6b5d7b | 2618 | return status; |
81f0b2a4 | 2619 | out_free_conn: |
d20c11d8 | 2620 | spin_unlock(&nn->client_lock); |
81f0b2a4 | 2621 | free_conn(conn); |
d20c11d8 JL |
2622 | if (old) |
2623 | expire_client(old); | |
81f0b2a4 BF |
2624 | out_free_session: |
2625 | __free_session(new); | |
55c760cf BF |
2626 | out_release_drc_mem: |
2627 | nfsd4_put_drc_mem(&cr_ses->fore_channel); | |
1ca50792 | 2628 | return status; |
069b6ad4 AA |
2629 | } |
2630 | ||
1d1bc8f2 BF |
2631 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
2632 | { | |
2633 | switch (*dir) { | |
2634 | case NFS4_CDFC4_FORE: | |
2635 | case NFS4_CDFC4_BACK: | |
2636 | return nfs_ok; | |
2637 | case NFS4_CDFC4_FORE_OR_BOTH: | |
2638 | case NFS4_CDFC4_BACK_OR_BOTH: | |
2639 | *dir = NFS4_CDFC4_BOTH; | |
2640 | return nfs_ok; | |
2641 | }; | |
2642 | return nfserr_inval; | |
2643 | } | |
2644 | ||
cb73a9f4 BF |
2645 | __be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_backchannel_ctl *bc) |
2646 | { | |
2647 | struct nfsd4_session *session = cstate->session; | |
c9a49628 | 2648 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
b78724b7 | 2649 | __be32 status; |
cb73a9f4 | 2650 | |
b78724b7 BF |
2651 | status = nfsd4_check_cb_sec(&bc->bc_cb_sec); |
2652 | if (status) | |
2653 | return status; | |
c9a49628 | 2654 | spin_lock(&nn->client_lock); |
cb73a9f4 BF |
2655 | session->se_cb_prog = bc->bc_cb_program; |
2656 | session->se_cb_sec = bc->bc_cb_sec; | |
c9a49628 | 2657 | spin_unlock(&nn->client_lock); |
cb73a9f4 BF |
2658 | |
2659 | nfsd4_probe_callback(session->se_client); | |
2660 | ||
2661 | return nfs_ok; | |
2662 | } | |
2663 | ||
1d1bc8f2 BF |
2664 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, |
2665 | struct nfsd4_compound_state *cstate, | |
2666 | struct nfsd4_bind_conn_to_session *bcts) | |
2667 | { | |
2668 | __be32 status; | |
3ba63671 | 2669 | struct nfsd4_conn *conn; |
4f6e6c17 | 2670 | struct nfsd4_session *session; |
d4e19e70 TM |
2671 | struct net *net = SVC_NET(rqstp); |
2672 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1d1bc8f2 BF |
2673 | |
2674 | if (!nfsd4_last_compound_op(rqstp)) | |
2675 | return nfserr_not_only_op; | |
c9a49628 | 2676 | spin_lock(&nn->client_lock); |
d4e19e70 | 2677 | session = find_in_sessionid_hashtbl(&bcts->sessionid, net, &status); |
c9a49628 | 2678 | spin_unlock(&nn->client_lock); |
4f6e6c17 | 2679 | if (!session) |
d4e19e70 | 2680 | goto out_no_session; |
57266a6e BF |
2681 | status = nfserr_wrong_cred; |
2682 | if (!mach_creds_match(session->se_client, rqstp)) | |
2683 | goto out; | |
1d1bc8f2 | 2684 | status = nfsd4_map_bcts_dir(&bcts->dir); |
3ba63671 | 2685 | if (status) |
4f6e6c17 | 2686 | goto out; |
3ba63671 | 2687 | conn = alloc_conn(rqstp, bcts->dir); |
4f6e6c17 | 2688 | status = nfserr_jukebox; |
3ba63671 | 2689 | if (!conn) |
4f6e6c17 BF |
2690 | goto out; |
2691 | nfsd4_init_conn(rqstp, conn, session); | |
2692 | status = nfs_ok; | |
2693 | out: | |
d4e19e70 TM |
2694 | nfsd4_put_session(session); |
2695 | out_no_session: | |
4f6e6c17 | 2696 | return status; |
1d1bc8f2 BF |
2697 | } |
2698 | ||
5d4cec2f BF |
2699 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
2700 | { | |
2701 | if (!session) | |
2702 | return 0; | |
2703 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
2704 | } | |
2705 | ||
069b6ad4 AA |
2706 | __be32 |
2707 | nfsd4_destroy_session(struct svc_rqst *r, | |
2708 | struct nfsd4_compound_state *cstate, | |
2709 | struct nfsd4_destroy_session *sessionid) | |
2710 | { | |
e10e0cfc | 2711 | struct nfsd4_session *ses; |
abcdff09 | 2712 | __be32 status; |
f0f51f5c | 2713 | int ref_held_by_me = 0; |
d4e19e70 TM |
2714 | struct net *net = SVC_NET(r); |
2715 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
e10e0cfc | 2716 | |
abcdff09 | 2717 | status = nfserr_not_only_op; |
5d4cec2f | 2718 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 | 2719 | if (!nfsd4_last_compound_op(r)) |
abcdff09 | 2720 | goto out; |
f0f51f5c | 2721 | ref_held_by_me++; |
57716355 | 2722 | } |
e10e0cfc | 2723 | dump_sessionid(__func__, &sessionid->sessionid); |
c9a49628 | 2724 | spin_lock(&nn->client_lock); |
d4e19e70 | 2725 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid, net, &status); |
abcdff09 BF |
2726 | if (!ses) |
2727 | goto out_client_lock; | |
57266a6e BF |
2728 | status = nfserr_wrong_cred; |
2729 | if (!mach_creds_match(ses->se_client, r)) | |
d4e19e70 | 2730 | goto out_put_session; |
f0f51f5c | 2731 | status = mark_session_dead_locked(ses, 1 + ref_held_by_me); |
66b2b9b2 | 2732 | if (status) |
f0f51f5c | 2733 | goto out_put_session; |
e10e0cfc | 2734 | unhash_session(ses); |
c9a49628 | 2735 | spin_unlock(&nn->client_lock); |
e10e0cfc | 2736 | |
84f5f7cc | 2737 | nfsd4_probe_callback_sync(ses->se_client); |
19cf5c02 | 2738 | |
c9a49628 | 2739 | spin_lock(&nn->client_lock); |
e10e0cfc | 2740 | status = nfs_ok; |
f0f51f5c | 2741 | out_put_session: |
d4e19e70 | 2742 | nfsd4_put_session_locked(ses); |
abcdff09 BF |
2743 | out_client_lock: |
2744 | spin_unlock(&nn->client_lock); | |
e10e0cfc | 2745 | out: |
e10e0cfc | 2746 | return status; |
069b6ad4 AA |
2747 | } |
2748 | ||
a663bdd8 | 2749 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
2750 | { |
2751 | struct nfsd4_conn *c; | |
2752 | ||
2753 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 2754 | if (c->cn_xprt == xpt) { |
328ead28 BF |
2755 | return c; |
2756 | } | |
2757 | } | |
2758 | return NULL; | |
2759 | } | |
2760 | ||
57266a6e | 2761 | static __be32 nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
2762 | { |
2763 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 2764 | struct nfsd4_conn *c; |
57266a6e | 2765 | __be32 status = nfs_ok; |
21b75b01 | 2766 | int ret; |
328ead28 BF |
2767 | |
2768 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 2769 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
57266a6e BF |
2770 | if (c) |
2771 | goto out_free; | |
2772 | status = nfserr_conn_not_bound_to_session; | |
2773 | if (clp->cl_mach_cred) | |
2774 | goto out_free; | |
328ead28 BF |
2775 | __nfsd4_hash_conn(new, ses); |
2776 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
2777 | ret = nfsd4_register_conn(new); |
2778 | if (ret) | |
2779 | /* oops; xprt is already down: */ | |
2780 | nfsd4_conn_lost(&new->cn_xpt_user); | |
57266a6e BF |
2781 | return nfs_ok; |
2782 | out_free: | |
2783 | spin_unlock(&clp->cl_lock); | |
2784 | free_conn(new); | |
2785 | return status; | |
328ead28 BF |
2786 | } |
2787 | ||
868b89c3 MJ |
2788 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
2789 | { | |
2790 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
2791 | ||
2792 | return args->opcnt > session->se_fchannel.maxops; | |
2793 | } | |
2794 | ||
ae82a8d0 MJ |
2795 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
2796 | struct nfsd4_session *session) | |
2797 | { | |
2798 | struct xdr_buf *xb = &rqstp->rq_arg; | |
2799 | ||
2800 | return xb->len > session->se_fchannel.maxreq_sz; | |
2801 | } | |
2802 | ||
069b6ad4 | 2803 | __be32 |
b85d4c01 | 2804 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
2805 | struct nfsd4_compound_state *cstate, |
2806 | struct nfsd4_sequence *seq) | |
2807 | { | |
f9bb94c4 | 2808 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
47ee5298 | 2809 | struct xdr_stream *xdr = &resp->xdr; |
b85d4c01 | 2810 | struct nfsd4_session *session; |
221a6876 | 2811 | struct nfs4_client *clp; |
b85d4c01 | 2812 | struct nfsd4_slot *slot; |
a663bdd8 | 2813 | struct nfsd4_conn *conn; |
57b7b43b | 2814 | __be32 status; |
47ee5298 | 2815 | int buflen; |
d4e19e70 TM |
2816 | struct net *net = SVC_NET(rqstp); |
2817 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
b85d4c01 | 2818 | |
f9bb94c4 AA |
2819 | if (resp->opcnt != 1) |
2820 | return nfserr_sequence_pos; | |
2821 | ||
a663bdd8 BF |
2822 | /* |
2823 | * Will be either used or freed by nfsd4_sequence_check_conn | |
2824 | * below. | |
2825 | */ | |
2826 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
2827 | if (!conn) | |
2828 | return nfserr_jukebox; | |
2829 | ||
c9a49628 | 2830 | spin_lock(&nn->client_lock); |
d4e19e70 | 2831 | session = find_in_sessionid_hashtbl(&seq->sessionid, net, &status); |
b85d4c01 | 2832 | if (!session) |
221a6876 BF |
2833 | goto out_no_session; |
2834 | clp = session->se_client; | |
b85d4c01 | 2835 | |
868b89c3 MJ |
2836 | status = nfserr_too_many_ops; |
2837 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
66b2b9b2 | 2838 | goto out_put_session; |
868b89c3 | 2839 | |
ae82a8d0 MJ |
2840 | status = nfserr_req_too_big; |
2841 | if (nfsd4_request_too_big(rqstp, session)) | |
66b2b9b2 | 2842 | goto out_put_session; |
ae82a8d0 | 2843 | |
b85d4c01 | 2844 | status = nfserr_badslot; |
6c18ba9f | 2845 | if (seq->slotid >= session->se_fchannel.maxreqs) |
66b2b9b2 | 2846 | goto out_put_session; |
b85d4c01 | 2847 | |
557ce264 | 2848 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
2849 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
2850 | ||
a8dfdaeb AA |
2851 | /* We do not negotiate the number of slots yet, so set the |
2852 | * maxslots to the session maxreqs which is used to encode | |
2853 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
2854 | seq->maxslots = session->se_fchannel.maxreqs; | |
2855 | ||
73e79482 BF |
2856 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, |
2857 | slot->sl_flags & NFSD4_SLOT_INUSE); | |
b85d4c01 | 2858 | if (status == nfserr_replay_cache) { |
bf5c43c8 BF |
2859 | status = nfserr_seq_misordered; |
2860 | if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) | |
66b2b9b2 | 2861 | goto out_put_session; |
b85d4c01 BH |
2862 | cstate->slot = slot; |
2863 | cstate->session = session; | |
4b24ca7d | 2864 | cstate->clp = clp; |
da3846a2 | 2865 | /* Return the cached reply status and set cstate->status |
557ce264 | 2866 | * for nfsd4_proc_compound processing */ |
bf864a31 | 2867 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 2868 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 2869 | goto out; |
b85d4c01 BH |
2870 | } |
2871 | if (status) | |
66b2b9b2 | 2872 | goto out_put_session; |
b85d4c01 | 2873 | |
57266a6e | 2874 | status = nfsd4_sequence_check_conn(conn, session); |
a663bdd8 | 2875 | conn = NULL; |
57266a6e BF |
2876 | if (status) |
2877 | goto out_put_session; | |
328ead28 | 2878 | |
47ee5298 BF |
2879 | buflen = (seq->cachethis) ? |
2880 | session->se_fchannel.maxresp_cached : | |
2881 | session->se_fchannel.maxresp_sz; | |
2882 | status = (seq->cachethis) ? nfserr_rep_too_big_to_cache : | |
2883 | nfserr_rep_too_big; | |
a5cddc88 | 2884 | if (xdr_restrict_buflen(xdr, buflen - rqstp->rq_auth_slack)) |
47ee5298 | 2885 | goto out_put_session; |
32aaa62e | 2886 | svc_reserve(rqstp, buflen); |
47ee5298 BF |
2887 | |
2888 | status = nfs_ok; | |
b85d4c01 | 2889 | /* Success! bump slot seqid */ |
b85d4c01 | 2890 | slot->sl_seqid = seq->seqid; |
bf5c43c8 | 2891 | slot->sl_flags |= NFSD4_SLOT_INUSE; |
73e79482 BF |
2892 | if (seq->cachethis) |
2893 | slot->sl_flags |= NFSD4_SLOT_CACHETHIS; | |
bf5c43c8 BF |
2894 | else |
2895 | slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; | |
b85d4c01 BH |
2896 | |
2897 | cstate->slot = slot; | |
2898 | cstate->session = session; | |
4b24ca7d | 2899 | cstate->clp = clp; |
b85d4c01 | 2900 | |
b85d4c01 | 2901 | out: |
221a6876 BF |
2902 | switch (clp->cl_cb_state) { |
2903 | case NFSD4_CB_DOWN: | |
2904 | seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; | |
2905 | break; | |
2906 | case NFSD4_CB_FAULT: | |
2907 | seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; | |
2908 | break; | |
2909 | default: | |
2910 | seq->status_flags = 0; | |
aaf84eb9 | 2911 | } |
3bd64a5b BF |
2912 | if (!list_empty(&clp->cl_revoked)) |
2913 | seq->status_flags |= SEQ4_STATUS_RECALLABLE_STATE_REVOKED; | |
221a6876 | 2914 | out_no_session: |
3f42d2c4 KM |
2915 | if (conn) |
2916 | free_conn(conn); | |
c9a49628 | 2917 | spin_unlock(&nn->client_lock); |
b85d4c01 | 2918 | return status; |
66b2b9b2 | 2919 | out_put_session: |
d4e19e70 | 2920 | nfsd4_put_session_locked(session); |
221a6876 | 2921 | goto out_no_session; |
069b6ad4 AA |
2922 | } |
2923 | ||
b607664e TM |
2924 | void |
2925 | nfsd4_sequence_done(struct nfsd4_compoundres *resp) | |
2926 | { | |
2927 | struct nfsd4_compound_state *cs = &resp->cstate; | |
2928 | ||
2929 | if (nfsd4_has_session(cs)) { | |
b607664e TM |
2930 | if (cs->status != nfserr_replay_cache) { |
2931 | nfsd4_store_cache_entry(resp); | |
2932 | cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE; | |
2933 | } | |
d4e19e70 | 2934 | /* Drop session reference that was taken in nfsd4_sequence() */ |
b607664e | 2935 | nfsd4_put_session(cs->session); |
4b24ca7d JL |
2936 | } else if (cs->clp) |
2937 | put_client_renew(cs->clp); | |
b607664e TM |
2938 | } |
2939 | ||
345c2842 MJ |
2940 | __be32 |
2941 | nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) | |
2942 | { | |
6b10ad19 TM |
2943 | struct nfs4_client *conf, *unconf; |
2944 | struct nfs4_client *clp = NULL; | |
57b7b43b | 2945 | __be32 status = 0; |
8daae4dc | 2946 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
345c2842 | 2947 | |
6b10ad19 | 2948 | spin_lock(&nn->client_lock); |
0a7ec377 | 2949 | unconf = find_unconfirmed_client(&dc->clientid, true, nn); |
8daae4dc | 2950 | conf = find_confirmed_client(&dc->clientid, true, nn); |
78389046 | 2951 | WARN_ON_ONCE(conf && unconf); |
345c2842 MJ |
2952 | |
2953 | if (conf) { | |
c0293b01 | 2954 | if (client_has_state(conf)) { |
345c2842 MJ |
2955 | status = nfserr_clientid_busy; |
2956 | goto out; | |
2957 | } | |
fd699b8a JL |
2958 | status = mark_client_expired_locked(conf); |
2959 | if (status) | |
2960 | goto out; | |
6b10ad19 | 2961 | clp = conf; |
345c2842 MJ |
2962 | } else if (unconf) |
2963 | clp = unconf; | |
2964 | else { | |
2965 | status = nfserr_stale_clientid; | |
2966 | goto out; | |
2967 | } | |
57266a6e | 2968 | if (!mach_creds_match(clp, rqstp)) { |
6b10ad19 | 2969 | clp = NULL; |
57266a6e BF |
2970 | status = nfserr_wrong_cred; |
2971 | goto out; | |
2972 | } | |
6b10ad19 | 2973 | unhash_client_locked(clp); |
345c2842 | 2974 | out: |
6b10ad19 | 2975 | spin_unlock(&nn->client_lock); |
6b10ad19 TM |
2976 | if (clp) |
2977 | expire_client(clp); | |
345c2842 MJ |
2978 | return status; |
2979 | } | |
2980 | ||
4dc6ec00 BF |
2981 | __be32 |
2982 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
2983 | { | |
57b7b43b | 2984 | __be32 status = 0; |
bcecf1cc | 2985 | |
4dc6ec00 BF |
2986 | if (rc->rca_one_fs) { |
2987 | if (!cstate->current_fh.fh_dentry) | |
2988 | return nfserr_nofilehandle; | |
2989 | /* | |
2990 | * We don't take advantage of the rca_one_fs case. | |
2991 | * That's OK, it's optional, we can safely ignore it. | |
2992 | */ | |
2993 | return nfs_ok; | |
2994 | } | |
bcecf1cc | 2995 | |
bcecf1cc | 2996 | status = nfserr_complete_already; |
a52d726b JL |
2997 | if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, |
2998 | &cstate->session->se_client->cl_flags)) | |
bcecf1cc MJ |
2999 | goto out; |
3000 | ||
3001 | status = nfserr_stale_clientid; | |
3002 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
3003 | /* |
3004 | * The following error isn't really legal. | |
3005 | * But we only get here if the client just explicitly | |
3006 | * destroyed the client. Surely it no longer cares what | |
3007 | * error it gets back on an operation for the dead | |
3008 | * client. | |
3009 | */ | |
bcecf1cc MJ |
3010 | goto out; |
3011 | ||
3012 | status = nfs_ok; | |
2a4317c5 | 3013 | nfsd4_client_record_create(cstate->session->se_client); |
bcecf1cc | 3014 | out: |
bcecf1cc | 3015 | return status; |
4dc6ec00 BF |
3016 | } |
3017 | ||
b37ad28b | 3018 | __be32 |
b591480b BF |
3019 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3020 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 3021 | { |
a084daf5 | 3022 | struct xdr_netobj clname = setclid->se_name; |
1da177e4 | 3023 | nfs4_verifier clverifier = setclid->se_verf; |
3dbacee6 TM |
3024 | struct nfs4_client *conf, *new; |
3025 | struct nfs4_client *unconf = NULL; | |
b37ad28b | 3026 | __be32 status; |
c212cecf SK |
3027 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
3028 | ||
5cc40fd7 TM |
3029 | new = create_client(clname, rqstp, &clverifier); |
3030 | if (new == NULL) | |
3031 | return nfserr_jukebox; | |
63db4632 | 3032 | /* Cases below refer to rfc 3530 section 14.2.33: */ |
3dbacee6 | 3033 | spin_lock(&nn->client_lock); |
382a62e7 | 3034 | conf = find_confirmed_client_by_name(&clname, nn); |
28ce6054 | 3035 | if (conf) { |
63db4632 | 3036 | /* case 0: */ |
1da177e4 | 3037 | status = nfserr_clid_inuse; |
e203d506 BF |
3038 | if (clp_used_exchangeid(conf)) |
3039 | goto out; | |
026722c2 | 3040 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
3041 | char addr_str[INET6_ADDRSTRLEN]; |
3042 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
3043 | sizeof(addr_str)); | |
3044 | dprintk("NFSD: setclientid: string in use by client " | |
3045 | "at %s\n", addr_str); | |
1da177e4 LT |
3046 | goto out; |
3047 | } | |
1da177e4 | 3048 | } |
a99454aa | 3049 | unconf = find_unconfirmed_client_by_name(&clname, nn); |
8f930711 | 3050 | if (unconf) |
3dbacee6 | 3051 | unhash_client_locked(unconf); |
41eb1670 | 3052 | if (conf && same_verf(&conf->cl_verifier, &clverifier)) { |
63db4632 | 3053 | /* case 1: probable callback update */ |
1da177e4 | 3054 | copy_clid(new, conf); |
41eb1670 KM |
3055 | gen_confirm(new, nn); |
3056 | } else /* case 4 (new client) or cases 2, 3 (client reboot): */ | |
c212cecf | 3057 | gen_clid(new, nn); |
8323c3b2 | 3058 | new->cl_minorversion = 0; |
6f3d772f | 3059 | gen_callback(new, setclid, rqstp); |
ac55fdc4 | 3060 | add_to_unconfirmed(new); |
1da177e4 LT |
3061 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
3062 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
3063 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
5cc40fd7 | 3064 | new = NULL; |
1da177e4 LT |
3065 | status = nfs_ok; |
3066 | out: | |
3dbacee6 | 3067 | spin_unlock(&nn->client_lock); |
5cc40fd7 TM |
3068 | if (new) |
3069 | free_client(new); | |
3dbacee6 TM |
3070 | if (unconf) |
3071 | expire_client(unconf); | |
1da177e4 LT |
3072 | return status; |
3073 | } | |
3074 | ||
3075 | ||
b37ad28b | 3076 | __be32 |
b591480b BF |
3077 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
3078 | struct nfsd4_compound_state *cstate, | |
3079 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 3080 | { |
21ab45a4 | 3081 | struct nfs4_client *conf, *unconf; |
d20c11d8 | 3082 | struct nfs4_client *old = NULL; |
1da177e4 LT |
3083 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
3084 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 3085 | __be32 status; |
7f2210fa | 3086 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 3087 | |
2c142baa | 3088 | if (STALE_CLIENTID(clid, nn)) |
1da177e4 | 3089 | return nfserr_stale_clientid; |
21ab45a4 | 3090 | |
d20c11d8 | 3091 | spin_lock(&nn->client_lock); |
8daae4dc | 3092 | conf = find_confirmed_client(clid, false, nn); |
0a7ec377 | 3093 | unconf = find_unconfirmed_client(clid, false, nn); |
a186e767 | 3094 | /* |
8695b90a BF |
3095 | * We try hard to give out unique clientid's, so if we get an |
3096 | * attempt to confirm the same clientid with a different cred, | |
3097 | * there's a bug somewhere. Let's charitably assume it's our | |
3098 | * bug. | |
a186e767 | 3099 | */ |
8695b90a BF |
3100 | status = nfserr_serverfault; |
3101 | if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) | |
3102 | goto out; | |
3103 | if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) | |
3104 | goto out; | |
63db4632 | 3105 | /* cases below refer to rfc 3530 section 14.2.34: */ |
90d700b7 BF |
3106 | if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) { |
3107 | if (conf && !unconf) /* case 2: probable retransmit */ | |
1da177e4 | 3108 | status = nfs_ok; |
90d700b7 BF |
3109 | else /* case 4: client hasn't noticed we rebooted yet? */ |
3110 | status = nfserr_stale_clientid; | |
3111 | goto out; | |
3112 | } | |
3113 | status = nfs_ok; | |
3114 | if (conf) { /* case 1: callback update */ | |
d20c11d8 JL |
3115 | old = unconf; |
3116 | unhash_client_locked(old); | |
8695b90a | 3117 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
90d700b7 | 3118 | } else { /* case 3: normal case; new or rebooted client */ |
d20c11d8 JL |
3119 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
3120 | if (old) { | |
3121 | status = mark_client_expired_locked(old); | |
7abea1e8 JL |
3122 | if (status) { |
3123 | old = NULL; | |
221a6876 | 3124 | goto out; |
7abea1e8 | 3125 | } |
221a6876 | 3126 | } |
8695b90a | 3127 | move_to_confirmed(unconf); |
d20c11d8 | 3128 | conf = unconf; |
08e8987c | 3129 | } |
d20c11d8 JL |
3130 | get_client_locked(conf); |
3131 | spin_unlock(&nn->client_lock); | |
3132 | nfsd4_probe_callback(conf); | |
3133 | spin_lock(&nn->client_lock); | |
3134 | put_client_renew_locked(conf); | |
1da177e4 | 3135 | out: |
d20c11d8 JL |
3136 | spin_unlock(&nn->client_lock); |
3137 | if (old) | |
3138 | expire_client(old); | |
1da177e4 LT |
3139 | return status; |
3140 | } | |
3141 | ||
32513b40 BF |
3142 | static struct nfs4_file *nfsd4_alloc_file(void) |
3143 | { | |
3144 | return kmem_cache_alloc(file_slab, GFP_KERNEL); | |
3145 | } | |
3146 | ||
1da177e4 | 3147 | /* OPEN Share state helper functions */ |
5b095e99 JL |
3148 | static void nfsd4_init_file(struct knfsd_fh *fh, unsigned int hashval, |
3149 | struct nfs4_file *fp) | |
1da177e4 | 3150 | { |
950e0118 TM |
3151 | lockdep_assert_held(&state_lock); |
3152 | ||
32513b40 | 3153 | atomic_set(&fp->fi_ref, 1); |
1d31a253 | 3154 | spin_lock_init(&fp->fi_lock); |
32513b40 BF |
3155 | INIT_LIST_HEAD(&fp->fi_stateids); |
3156 | INIT_LIST_HEAD(&fp->fi_delegations); | |
8287f009 | 3157 | INIT_LIST_HEAD(&fp->fi_clnt_odstate); |
e2cf80d7 | 3158 | fh_copy_shallow(&fp->fi_fhandle, fh); |
0c637be8 | 3159 | fp->fi_deleg_file = NULL; |
32513b40 | 3160 | fp->fi_had_conflict = false; |
baeb4ff0 | 3161 | fp->fi_share_deny = 0; |
32513b40 BF |
3162 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); |
3163 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
9cf514cc CH |
3164 | #ifdef CONFIG_NFSD_PNFS |
3165 | INIT_LIST_HEAD(&fp->fi_lo_states); | |
c5c707f9 | 3166 | atomic_set(&fp->fi_lo_recalls, 0); |
9cf514cc | 3167 | #endif |
5b095e99 | 3168 | hlist_add_head_rcu(&fp->fi_hash, &file_hashtbl[hashval]); |
1da177e4 LT |
3169 | } |
3170 | ||
e8ff2a84 | 3171 | void |
1da177e4 LT |
3172 | nfsd4_free_slabs(void) |
3173 | { | |
8287f009 | 3174 | kmem_cache_destroy(odstate_slab); |
abf1135b CH |
3175 | kmem_cache_destroy(openowner_slab); |
3176 | kmem_cache_destroy(lockowner_slab); | |
3177 | kmem_cache_destroy(file_slab); | |
3178 | kmem_cache_destroy(stateid_slab); | |
3179 | kmem_cache_destroy(deleg_slab); | |
e60d4398 | 3180 | } |
1da177e4 | 3181 | |
72083396 | 3182 | int |
e60d4398 N |
3183 | nfsd4_init_slabs(void) |
3184 | { | |
fe0750e5 BF |
3185 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
3186 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
3187 | if (openowner_slab == NULL) | |
abf1135b | 3188 | goto out; |
fe0750e5 | 3189 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", |
3c40794b | 3190 | sizeof(struct nfs4_lockowner), 0, 0, NULL); |
fe0750e5 | 3191 | if (lockowner_slab == NULL) |
abf1135b | 3192 | goto out_free_openowner_slab; |
e60d4398 | 3193 | file_slab = kmem_cache_create("nfsd4_files", |
20c2df83 | 3194 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 | 3195 | if (file_slab == NULL) |
abf1135b | 3196 | goto out_free_lockowner_slab; |
5ac049ac | 3197 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
dcef0413 | 3198 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
5ac049ac | 3199 | if (stateid_slab == NULL) |
abf1135b | 3200 | goto out_free_file_slab; |
5b2d21c1 | 3201 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 3202 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 | 3203 | if (deleg_slab == NULL) |
abf1135b | 3204 | goto out_free_stateid_slab; |
8287f009 SB |
3205 | odstate_slab = kmem_cache_create("nfsd4_odstate", |
3206 | sizeof(struct nfs4_clnt_odstate), 0, 0, NULL); | |
3207 | if (odstate_slab == NULL) | |
3208 | goto out_free_deleg_slab; | |
e60d4398 | 3209 | return 0; |
abf1135b | 3210 | |
8287f009 SB |
3211 | out_free_deleg_slab: |
3212 | kmem_cache_destroy(deleg_slab); | |
abf1135b CH |
3213 | out_free_stateid_slab: |
3214 | kmem_cache_destroy(stateid_slab); | |
3215 | out_free_file_slab: | |
3216 | kmem_cache_destroy(file_slab); | |
3217 | out_free_lockowner_slab: | |
3218 | kmem_cache_destroy(lockowner_slab); | |
3219 | out_free_openowner_slab: | |
3220 | kmem_cache_destroy(openowner_slab); | |
3221 | out: | |
e60d4398 N |
3222 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); |
3223 | return -ENOMEM; | |
1da177e4 LT |
3224 | } |
3225 | ||
ff194bd9 | 3226 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 3227 | { |
ff194bd9 BF |
3228 | rp->rp_status = nfserr_serverfault; |
3229 | rp->rp_buflen = 0; | |
3230 | rp->rp_buf = rp->rp_ibuf; | |
58fb12e6 JL |
3231 | mutex_init(&rp->rp_mutex); |
3232 | } | |
3233 | ||
3234 | static void nfsd4_cstate_assign_replay(struct nfsd4_compound_state *cstate, | |
3235 | struct nfs4_stateowner *so) | |
3236 | { | |
3237 | if (!nfsd4_has_session(cstate)) { | |
3238 | mutex_lock(&so->so_replay.rp_mutex); | |
b5971afa | 3239 | cstate->replay_owner = nfs4_get_stateowner(so); |
58fb12e6 JL |
3240 | } |
3241 | } | |
3242 | ||
3243 | void nfsd4_cstate_clear_replay(struct nfsd4_compound_state *cstate) | |
3244 | { | |
3245 | struct nfs4_stateowner *so = cstate->replay_owner; | |
3246 | ||
3247 | if (so != NULL) { | |
3248 | cstate->replay_owner = NULL; | |
3249 | mutex_unlock(&so->so_replay.rp_mutex); | |
3250 | nfs4_put_stateowner(so); | |
3251 | } | |
1da177e4 LT |
3252 | } |
3253 | ||
fe0750e5 | 3254 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 3255 | { |
1da177e4 | 3256 | struct nfs4_stateowner *sop; |
1da177e4 | 3257 | |
fe0750e5 | 3258 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
3259 | if (!sop) |
3260 | return NULL; | |
3261 | ||
3262 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); | |
3263 | if (!sop->so_owner.data) { | |
fe0750e5 | 3264 | kmem_cache_free(slab, sop); |
1da177e4 | 3265 | return NULL; |
ff194bd9 BF |
3266 | } |
3267 | sop->so_owner.len = owner->len; | |
3268 | ||
ea1da636 | 3269 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 BF |
3270 | sop->so_client = clp; |
3271 | init_nfs4_replay(&sop->so_replay); | |
6b180f0b | 3272 | atomic_set(&sop->so_count, 1); |
ff194bd9 BF |
3273 | return sop; |
3274 | } | |
3275 | ||
fe0750e5 | 3276 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 | 3277 | { |
d4f0489f | 3278 | lockdep_assert_held(&clp->cl_lock); |
9b531137 | 3279 | |
d4f0489f TM |
3280 | list_add(&oo->oo_owner.so_strhash, |
3281 | &clp->cl_ownerstr_hashtbl[strhashval]); | |
fe0750e5 | 3282 | list_add(&oo->oo_perclient, &clp->cl_openowners); |
ff194bd9 BF |
3283 | } |
3284 | ||
8f4b54c5 JL |
3285 | static void nfs4_unhash_openowner(struct nfs4_stateowner *so) |
3286 | { | |
d4f0489f | 3287 | unhash_openowner_locked(openowner(so)); |
8f4b54c5 JL |
3288 | } |
3289 | ||
6b180f0b JL |
3290 | static void nfs4_free_openowner(struct nfs4_stateowner *so) |
3291 | { | |
3292 | struct nfs4_openowner *oo = openowner(so); | |
3293 | ||
3294 | kmem_cache_free(openowner_slab, oo); | |
3295 | } | |
3296 | ||
3297 | static const struct nfs4_stateowner_operations openowner_ops = { | |
8f4b54c5 JL |
3298 | .so_unhash = nfs4_unhash_openowner, |
3299 | .so_free = nfs4_free_openowner, | |
6b180f0b JL |
3300 | }; |
3301 | ||
fe0750e5 | 3302 | static struct nfs4_openowner * |
13d6f66b | 3303 | alloc_init_open_stateowner(unsigned int strhashval, struct nfsd4_open *open, |
db24b3b4 JL |
3304 | struct nfsd4_compound_state *cstate) |
3305 | { | |
13d6f66b | 3306 | struct nfs4_client *clp = cstate->clp; |
7ffb5880 | 3307 | struct nfs4_openowner *oo, *ret; |
ff194bd9 | 3308 | |
fe0750e5 BF |
3309 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
3310 | if (!oo) | |
ff194bd9 | 3311 | return NULL; |
6b180f0b | 3312 | oo->oo_owner.so_ops = &openowner_ops; |
fe0750e5 BF |
3313 | oo->oo_owner.so_is_open_owner = 1; |
3314 | oo->oo_owner.so_seqid = open->op_seqid; | |
d3134b10 | 3315 | oo->oo_flags = 0; |
db24b3b4 JL |
3316 | if (nfsd4_has_session(cstate)) |
3317 | oo->oo_flags |= NFS4_OO_CONFIRMED; | |
fe0750e5 | 3318 | oo->oo_time = 0; |
38c387b5 | 3319 | oo->oo_last_closed_stid = NULL; |
fe0750e5 | 3320 | INIT_LIST_HEAD(&oo->oo_close_lru); |
d4f0489f TM |
3321 | spin_lock(&clp->cl_lock); |
3322 | ret = find_openstateowner_str_locked(strhashval, open, clp); | |
7ffb5880 TM |
3323 | if (ret == NULL) { |
3324 | hash_openowner(oo, clp, strhashval); | |
3325 | ret = oo; | |
3326 | } else | |
d50ffded KM |
3327 | nfs4_free_stateowner(&oo->oo_owner); |
3328 | ||
d4f0489f | 3329 | spin_unlock(&clp->cl_lock); |
c5952338 | 3330 | return ret; |
1da177e4 LT |
3331 | } |
3332 | ||
996e0938 | 3333 | static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { |
fe0750e5 | 3334 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 3335 | |
d6f2bc5d | 3336 | atomic_inc(&stp->st_stid.sc_count); |
3abdb607 | 3337 | stp->st_stid.sc_type = NFS4_OPEN_STID; |
3c87b9b7 | 3338 | INIT_LIST_HEAD(&stp->st_locks); |
b5971afa | 3339 | stp->st_stateowner = nfs4_get_stateowner(&oo->oo_owner); |
13cd2184 | 3340 | get_nfs4_file(fp); |
11b9164a | 3341 | stp->st_stid.sc_file = fp; |
1da177e4 LT |
3342 | stp->st_access_bmap = 0; |
3343 | stp->st_deny_bmap = 0; | |
4c4cd222 | 3344 | stp->st_openstp = NULL; |
1c755dc1 JL |
3345 | spin_lock(&oo->oo_owner.so_client->cl_lock); |
3346 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); | |
1d31a253 TM |
3347 | spin_lock(&fp->fi_lock); |
3348 | list_add(&stp->st_perfile, &fp->fi_stateids); | |
3349 | spin_unlock(&fp->fi_lock); | |
1c755dc1 | 3350 | spin_unlock(&oo->oo_owner.so_client->cl_lock); |
1da177e4 LT |
3351 | } |
3352 | ||
d3134b10 JL |
3353 | /* |
3354 | * In the 4.0 case we need to keep the owners around a little while to handle | |
3355 | * CLOSE replay. We still do need to release any file access that is held by | |
3356 | * them before returning however. | |
3357 | */ | |
fd39ca9a | 3358 | static void |
d3134b10 | 3359 | move_to_close_lru(struct nfs4_ol_stateid *s, struct net *net) |
1da177e4 | 3360 | { |
217526e7 | 3361 | struct nfs4_ol_stateid *last; |
d3134b10 JL |
3362 | struct nfs4_openowner *oo = openowner(s->st_stateowner); |
3363 | struct nfsd_net *nn = net_generic(s->st_stid.sc_client->net, | |
3364 | nfsd_net_id); | |
73758fed | 3365 | |
fe0750e5 | 3366 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 3367 | |
b401be22 JL |
3368 | /* |
3369 | * We know that we hold one reference via nfsd4_close, and another | |
3370 | * "persistent" reference for the client. If the refcount is higher | |
3371 | * than 2, then there are still calls in progress that are using this | |
3372 | * stateid. We can't put the sc_file reference until they are finished. | |
3373 | * Wait for the refcount to drop to 2. Since it has been unhashed, | |
3374 | * there should be no danger of the refcount going back up again at | |
3375 | * this point. | |
3376 | */ | |
3377 | wait_event(close_wq, atomic_read(&s->st_stid.sc_count) == 2); | |
3378 | ||
d3134b10 JL |
3379 | release_all_access(s); |
3380 | if (s->st_stid.sc_file) { | |
3381 | put_nfs4_file(s->st_stid.sc_file); | |
3382 | s->st_stid.sc_file = NULL; | |
3383 | } | |
217526e7 JL |
3384 | |
3385 | spin_lock(&nn->client_lock); | |
3386 | last = oo->oo_last_closed_stid; | |
d3134b10 | 3387 | oo->oo_last_closed_stid = s; |
73758fed | 3388 | list_move_tail(&oo->oo_close_lru, &nn->close_lru); |
fe0750e5 | 3389 | oo->oo_time = get_seconds(); |
217526e7 JL |
3390 | spin_unlock(&nn->client_lock); |
3391 | if (last) | |
3392 | nfs4_put_stid(&last->st_stid); | |
1da177e4 LT |
3393 | } |
3394 | ||
1da177e4 LT |
3395 | /* search file_hashtbl[] for file */ |
3396 | static struct nfs4_file * | |
5b095e99 | 3397 | find_file_locked(struct knfsd_fh *fh, unsigned int hashval) |
1da177e4 | 3398 | { |
1da177e4 LT |
3399 | struct nfs4_file *fp; |
3400 | ||
5b095e99 | 3401 | hlist_for_each_entry_rcu(fp, &file_hashtbl[hashval], fi_hash) { |
4d94c2ef | 3402 | if (fh_match(&fp->fi_fhandle, fh)) { |
5b095e99 JL |
3403 | if (atomic_inc_not_zero(&fp->fi_ref)) |
3404 | return fp; | |
13cd2184 | 3405 | } |
1da177e4 LT |
3406 | } |
3407 | return NULL; | |
3408 | } | |
3409 | ||
e6ba76e1 | 3410 | struct nfs4_file * |
ca943217 | 3411 | find_file(struct knfsd_fh *fh) |
950e0118 TM |
3412 | { |
3413 | struct nfs4_file *fp; | |
5b095e99 | 3414 | unsigned int hashval = file_hashval(fh); |
950e0118 | 3415 | |
5b095e99 JL |
3416 | rcu_read_lock(); |
3417 | fp = find_file_locked(fh, hashval); | |
3418 | rcu_read_unlock(); | |
950e0118 TM |
3419 | return fp; |
3420 | } | |
3421 | ||
3422 | static struct nfs4_file * | |
f9c00c3a | 3423 | find_or_add_file(struct nfs4_file *new, struct knfsd_fh *fh) |
950e0118 TM |
3424 | { |
3425 | struct nfs4_file *fp; | |
5b095e99 JL |
3426 | unsigned int hashval = file_hashval(fh); |
3427 | ||
3428 | rcu_read_lock(); | |
3429 | fp = find_file_locked(fh, hashval); | |
3430 | rcu_read_unlock(); | |
3431 | if (fp) | |
3432 | return fp; | |
950e0118 TM |
3433 | |
3434 | spin_lock(&state_lock); | |
5b095e99 JL |
3435 | fp = find_file_locked(fh, hashval); |
3436 | if (likely(fp == NULL)) { | |
3437 | nfsd4_init_file(fh, hashval, new); | |
950e0118 TM |
3438 | fp = new; |
3439 | } | |
3440 | spin_unlock(&state_lock); | |
3441 | ||
3442 | return fp; | |
3443 | } | |
3444 | ||
1da177e4 LT |
3445 | /* |
3446 | * Called to check deny when READ with all zero stateid or | |
3447 | * WRITE with all zero or all one stateid | |
3448 | */ | |
b37ad28b | 3449 | static __be32 |
1da177e4 LT |
3450 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
3451 | { | |
1da177e4 | 3452 | struct nfs4_file *fp; |
baeb4ff0 | 3453 | __be32 ret = nfs_ok; |
1da177e4 | 3454 | |
ca943217 | 3455 | fp = find_file(¤t_fh->fh_handle); |
13cd2184 | 3456 | if (!fp) |
baeb4ff0 JL |
3457 | return ret; |
3458 | /* Check for conflicting share reservations */ | |
1d31a253 | 3459 | spin_lock(&fp->fi_lock); |
baeb4ff0 JL |
3460 | if (fp->fi_share_deny & deny_type) |
3461 | ret = nfserr_locked; | |
1d31a253 | 3462 | spin_unlock(&fp->fi_lock); |
13cd2184 N |
3463 | put_nfs4_file(fp); |
3464 | return ret; | |
1da177e4 LT |
3465 | } |
3466 | ||
0162ac2b | 3467 | static void nfsd4_cb_recall_prepare(struct nfsd4_callback *cb) |
1da177e4 | 3468 | { |
0162ac2b | 3469 | struct nfs4_delegation *dp = cb_to_delegation(cb); |
11b9164a TM |
3470 | struct nfsd_net *nn = net_generic(dp->dl_stid.sc_client->net, |
3471 | nfsd_net_id); | |
e8c69d17 | 3472 | |
11b9164a | 3473 | block_delegations(&dp->dl_stid.sc_file->fi_fhandle); |
f54fe962 | 3474 | |
dff1399f | 3475 | /* |
f54fe962 JL |
3476 | * We can't do this in nfsd_break_deleg_cb because it is |
3477 | * already holding inode->i_lock. | |
3478 | * | |
dff1399f JL |
3479 | * If the dl_time != 0, then we know that it has already been |
3480 | * queued for a lease break. Don't queue it again. | |
3481 | */ | |
f54fe962 | 3482 | spin_lock(&state_lock); |
dff1399f | 3483 | if (dp->dl_time == 0) { |
dff1399f | 3484 | dp->dl_time = get_seconds(); |
02e1215f | 3485 | list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru); |
dff1399f | 3486 | } |
02e1215f JL |
3487 | spin_unlock(&state_lock); |
3488 | } | |
1da177e4 | 3489 | |
0162ac2b CH |
3490 | static int nfsd4_cb_recall_done(struct nfsd4_callback *cb, |
3491 | struct rpc_task *task) | |
3492 | { | |
3493 | struct nfs4_delegation *dp = cb_to_delegation(cb); | |
3494 | ||
3495 | switch (task->tk_status) { | |
3496 | case 0: | |
3497 | return 1; | |
3498 | case -EBADHANDLE: | |
3499 | case -NFS4ERR_BAD_STATEID: | |
3500 | /* | |
3501 | * Race: client probably got cb_recall before open reply | |
3502 | * granting delegation. | |
3503 | */ | |
3504 | if (dp->dl_retries--) { | |
3505 | rpc_delay(task, 2 * HZ); | |
3506 | return 0; | |
3507 | } | |
3508 | /*FALLTHRU*/ | |
3509 | default: | |
3510 | return -1; | |
3511 | } | |
3512 | } | |
3513 | ||
3514 | static void nfsd4_cb_recall_release(struct nfsd4_callback *cb) | |
3515 | { | |
3516 | struct nfs4_delegation *dp = cb_to_delegation(cb); | |
3517 | ||
3518 | nfs4_put_stid(&dp->dl_stid); | |
3519 | } | |
3520 | ||
3521 | static struct nfsd4_callback_ops nfsd4_cb_recall_ops = { | |
3522 | .prepare = nfsd4_cb_recall_prepare, | |
3523 | .done = nfsd4_cb_recall_done, | |
3524 | .release = nfsd4_cb_recall_release, | |
3525 | }; | |
3526 | ||
02e1215f JL |
3527 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
3528 | { | |
3529 | /* | |
3530 | * We're assuming the state code never drops its reference | |
3531 | * without first removing the lease. Since we're in this lease | |
3532 | * callback (and since the lease code is serialized by the kernel | |
3533 | * lock) we know the server hasn't removed the lease yet, we know | |
3534 | * it's safe to take a reference. | |
3535 | */ | |
72c0b0fb | 3536 | atomic_inc(&dp->dl_stid.sc_count); |
f0b5de1b | 3537 | nfsd4_run_cb(&dp->dl_recall); |
6b57d9c8 BF |
3538 | } |
3539 | ||
1c8c601a | 3540 | /* Called from break_lease() with i_lock held. */ |
4d01b7f5 JL |
3541 | static bool |
3542 | nfsd_break_deleg_cb(struct file_lock *fl) | |
6b57d9c8 | 3543 | { |
4d01b7f5 | 3544 | bool ret = false; |
acfdf5c3 BF |
3545 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
3546 | struct nfs4_delegation *dp; | |
6b57d9c8 | 3547 | |
7fa10cd1 BF |
3548 | if (!fp) { |
3549 | WARN(1, "(%p)->fl_owner NULL\n", fl); | |
4d01b7f5 | 3550 | return ret; |
7fa10cd1 BF |
3551 | } |
3552 | if (fp->fi_had_conflict) { | |
3553 | WARN(1, "duplicate break on %p\n", fp); | |
4d01b7f5 | 3554 | return ret; |
7fa10cd1 | 3555 | } |
0272e1fd BF |
3556 | /* |
3557 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 3558 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 3559 | * in time: |
0272e1fd BF |
3560 | */ |
3561 | fl->fl_break_time = 0; | |
1da177e4 | 3562 | |
02e1215f | 3563 | spin_lock(&fp->fi_lock); |
417c6629 JL |
3564 | fp->fi_had_conflict = true; |
3565 | /* | |
4d01b7f5 JL |
3566 | * If there are no delegations on the list, then return true |
3567 | * so that the lease code will go ahead and delete it. | |
417c6629 JL |
3568 | */ |
3569 | if (list_empty(&fp->fi_delegations)) | |
4d01b7f5 | 3570 | ret = true; |
417c6629 JL |
3571 | else |
3572 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
3573 | nfsd_break_one_deleg(dp); | |
02e1215f | 3574 | spin_unlock(&fp->fi_lock); |
4d01b7f5 | 3575 | return ret; |
1da177e4 LT |
3576 | } |
3577 | ||
c45198ed | 3578 | static int |
7448cc37 JL |
3579 | nfsd_change_deleg_cb(struct file_lock *onlist, int arg, |
3580 | struct list_head *dispose) | |
1da177e4 LT |
3581 | { |
3582 | if (arg & F_UNLCK) | |
c45198ed | 3583 | return lease_modify(onlist, arg, dispose); |
1da177e4 LT |
3584 | else |
3585 | return -EAGAIN; | |
3586 | } | |
3587 | ||
7b021967 | 3588 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
3589 | .lm_break = nfsd_break_deleg_cb, |
3590 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
3591 | }; |
3592 | ||
7a8711c9 BF |
3593 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
3594 | { | |
3595 | if (nfsd4_has_session(cstate)) | |
3596 | return nfs_ok; | |
3597 | if (seqid == so->so_seqid - 1) | |
3598 | return nfserr_replay_me; | |
3599 | if (seqid == so->so_seqid) | |
3600 | return nfs_ok; | |
3601 | return nfserr_bad_seqid; | |
3602 | } | |
1da177e4 | 3603 | |
4b24ca7d JL |
3604 | static __be32 lookup_clientid(clientid_t *clid, |
3605 | struct nfsd4_compound_state *cstate, | |
3606 | struct nfsd_net *nn) | |
3607 | { | |
3608 | struct nfs4_client *found; | |
3609 | ||
3610 | if (cstate->clp) { | |
3611 | found = cstate->clp; | |
3612 | if (!same_clid(&found->cl_clientid, clid)) | |
3613 | return nfserr_stale_clientid; | |
3614 | return nfs_ok; | |
3615 | } | |
3616 | ||
3617 | if (STALE_CLIENTID(clid, nn)) | |
3618 | return nfserr_stale_clientid; | |
3619 | ||
3620 | /* | |
3621 | * For v4.1+ we get the client in the SEQUENCE op. If we don't have one | |
3622 | * cached already then we know this is for is for v4.0 and "sessions" | |
3623 | * will be false. | |
3624 | */ | |
3625 | WARN_ON_ONCE(cstate->session); | |
3e339f96 | 3626 | spin_lock(&nn->client_lock); |
4b24ca7d | 3627 | found = find_confirmed_client(clid, false, nn); |
3e339f96 TM |
3628 | if (!found) { |
3629 | spin_unlock(&nn->client_lock); | |
4b24ca7d | 3630 | return nfserr_expired; |
3e339f96 TM |
3631 | } |
3632 | atomic_inc(&found->cl_refcount); | |
3633 | spin_unlock(&nn->client_lock); | |
4b24ca7d JL |
3634 | |
3635 | /* Cache the nfs4_client in cstate! */ | |
3636 | cstate->clp = found; | |
4b24ca7d JL |
3637 | return nfs_ok; |
3638 | } | |
3639 | ||
b37ad28b | 3640 | __be32 |
6668958f | 3641 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
3320fef1 | 3642 | struct nfsd4_open *open, struct nfsd_net *nn) |
1da177e4 | 3643 | { |
1da177e4 LT |
3644 | clientid_t *clientid = &open->op_clientid; |
3645 | struct nfs4_client *clp = NULL; | |
3646 | unsigned int strhashval; | |
fe0750e5 | 3647 | struct nfs4_openowner *oo = NULL; |
4cdc951b | 3648 | __be32 status; |
1da177e4 | 3649 | |
2c142baa | 3650 | if (STALE_CLIENTID(&open->op_clientid, nn)) |
1da177e4 | 3651 | return nfserr_stale_clientid; |
32513b40 BF |
3652 | /* |
3653 | * In case we need it later, after we've already created the | |
3654 | * file and don't want to risk a further failure: | |
3655 | */ | |
3656 | open->op_file = nfsd4_alloc_file(); | |
3657 | if (open->op_file == NULL) | |
3658 | return nfserr_jukebox; | |
1da177e4 | 3659 | |
2d91e895 TM |
3660 | status = lookup_clientid(clientid, cstate, nn); |
3661 | if (status) | |
3662 | return status; | |
3663 | clp = cstate->clp; | |
3664 | ||
d4f0489f TM |
3665 | strhashval = ownerstr_hashval(&open->op_owner); |
3666 | oo = find_openstateowner_str(strhashval, open, clp); | |
fe0750e5 BF |
3667 | open->op_openowner = oo; |
3668 | if (!oo) { | |
bcf130f9 | 3669 | goto new_owner; |
1da177e4 | 3670 | } |
dad1c067 | 3671 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
0f442aa2 | 3672 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
3673 | release_openowner(oo); |
3674 | open->op_openowner = NULL; | |
bcf130f9 | 3675 | goto new_owner; |
0f442aa2 | 3676 | } |
4cdc951b BF |
3677 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
3678 | if (status) | |
3679 | return status; | |
4cdc951b | 3680 | goto alloc_stateid; |
bcf130f9 | 3681 | new_owner: |
13d6f66b | 3682 | oo = alloc_init_open_stateowner(strhashval, open, cstate); |
bcf130f9 BF |
3683 | if (oo == NULL) |
3684 | return nfserr_jukebox; | |
3685 | open->op_openowner = oo; | |
4cdc951b | 3686 | alloc_stateid: |
b49e084d | 3687 | open->op_stp = nfs4_alloc_open_stateid(clp); |
4cdc951b BF |
3688 | if (!open->op_stp) |
3689 | return nfserr_jukebox; | |
8287f009 SB |
3690 | |
3691 | if (nfsd4_has_session(cstate) && | |
3692 | (cstate->current_fh.fh_export->ex_flags & NFSEXP_PNFS)) { | |
3693 | open->op_odstate = alloc_clnt_odstate(clp); | |
3694 | if (!open->op_odstate) | |
3695 | return nfserr_jukebox; | |
3696 | } | |
3697 | ||
0f442aa2 | 3698 | return nfs_ok; |
1da177e4 LT |
3699 | } |
3700 | ||
b37ad28b | 3701 | static inline __be32 |
4a6e43e6 N |
3702 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
3703 | { | |
3704 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
3705 | return nfserr_openmode; | |
3706 | else | |
3707 | return nfs_ok; | |
3708 | } | |
3709 | ||
f459e453 | 3710 | static int share_access_to_flags(u32 share_access) |
52f4fb43 | 3711 | { |
f459e453 | 3712 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
52f4fb43 N |
3713 | } |
3714 | ||
38c2f4b1 | 3715 | static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) |
24a0111e | 3716 | { |
f459e453 | 3717 | struct nfs4_stid *ret; |
24a0111e | 3718 | |
38c2f4b1 | 3719 | ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); |
f459e453 BF |
3720 | if (!ret) |
3721 | return NULL; | |
3722 | return delegstateid(ret); | |
24a0111e BF |
3723 | } |
3724 | ||
8b289b2c BF |
3725 | static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) |
3726 | { | |
3727 | return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || | |
3728 | open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; | |
3729 | } | |
3730 | ||
b37ad28b | 3731 | static __be32 |
41d22663 | 3732 | nfs4_check_deleg(struct nfs4_client *cl, struct nfsd4_open *open, |
567d9829 N |
3733 | struct nfs4_delegation **dp) |
3734 | { | |
3735 | int flags; | |
b37ad28b | 3736 | __be32 status = nfserr_bad_stateid; |
dcd94cc2 | 3737 | struct nfs4_delegation *deleg; |
567d9829 | 3738 | |
dcd94cc2 TM |
3739 | deleg = find_deleg_stateid(cl, &open->op_delegate_stateid); |
3740 | if (deleg == NULL) | |
c44c5eeb | 3741 | goto out; |
24a0111e | 3742 | flags = share_access_to_flags(open->op_share_access); |
dcd94cc2 TM |
3743 | status = nfs4_check_delegmode(deleg, flags); |
3744 | if (status) { | |
3745 | nfs4_put_stid(&deleg->dl_stid); | |
3746 | goto out; | |
3747 | } | |
3748 | *dp = deleg; | |
c44c5eeb | 3749 | out: |
8b289b2c | 3750 | if (!nfsd4_is_deleg_cur(open)) |
c44c5eeb N |
3751 | return nfs_ok; |
3752 | if (status) | |
3753 | return status; | |
dad1c067 | 3754 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
c44c5eeb | 3755 | return nfs_ok; |
567d9829 N |
3756 | } |
3757 | ||
a46cb7f2 JL |
3758 | static struct nfs4_ol_stateid * |
3759 | nfsd4_find_existing_open(struct nfs4_file *fp, struct nfsd4_open *open) | |
1da177e4 | 3760 | { |
a46cb7f2 | 3761 | struct nfs4_ol_stateid *local, *ret = NULL; |
fe0750e5 | 3762 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 3763 | |
1d31a253 | 3764 | spin_lock(&fp->fi_lock); |
8beefa24 | 3765 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
3766 | /* ignore lock owners */ |
3767 | if (local->st_stateowner->so_is_open_owner == 0) | |
3768 | continue; | |
baeb4ff0 | 3769 | if (local->st_stateowner == &oo->oo_owner) { |
a46cb7f2 | 3770 | ret = local; |
d6f2bc5d | 3771 | atomic_inc(&ret->st_stid.sc_count); |
baeb4ff0 | 3772 | break; |
1d31a253 | 3773 | } |
1da177e4 | 3774 | } |
1d31a253 | 3775 | spin_unlock(&fp->fi_lock); |
a46cb7f2 | 3776 | return ret; |
1da177e4 LT |
3777 | } |
3778 | ||
21fb4016 BF |
3779 | static inline int nfs4_access_to_access(u32 nfs4_access) |
3780 | { | |
3781 | int flags = 0; | |
3782 | ||
3783 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
3784 | flags |= NFSD_MAY_READ; | |
3785 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
3786 | flags |= NFSD_MAY_WRITE; | |
3787 | return flags; | |
3788 | } | |
3789 | ||
7e6a72e5 CH |
3790 | static inline __be32 |
3791 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, | |
3792 | struct nfsd4_open *open) | |
3793 | { | |
3794 | struct iattr iattr = { | |
3795 | .ia_valid = ATTR_SIZE, | |
3796 | .ia_size = 0, | |
3797 | }; | |
3798 | if (!open->op_truncate) | |
3799 | return 0; | |
3800 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
3801 | return nfserr_inval; | |
3802 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); | |
3803 | } | |
3804 | ||
0c12eaff | 3805 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
6eb3a1d0 JL |
3806 | struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp, |
3807 | struct nfsd4_open *open) | |
f9d7562f | 3808 | { |
de18643d | 3809 | struct file *filp = NULL; |
f9d7562f | 3810 | __be32 status; |
0c12eaff CB |
3811 | int oflag = nfs4_access_to_omode(open->op_share_access); |
3812 | int access = nfs4_access_to_access(open->op_share_access); | |
baeb4ff0 | 3813 | unsigned char old_access_bmap, old_deny_bmap; |
0c12eaff | 3814 | |
de18643d | 3815 | spin_lock(&fp->fi_lock); |
baeb4ff0 JL |
3816 | |
3817 | /* | |
3818 | * Are we trying to set a deny mode that would conflict with | |
3819 | * current access? | |
3820 | */ | |
3821 | status = nfs4_file_check_deny(fp, open->op_share_deny); | |
3822 | if (status != nfs_ok) { | |
3823 | spin_unlock(&fp->fi_lock); | |
3824 | goto out; | |
3825 | } | |
3826 | ||
3827 | /* set access to the file */ | |
3828 | status = nfs4_file_get_access(fp, open->op_share_access); | |
3829 | if (status != nfs_ok) { | |
3830 | spin_unlock(&fp->fi_lock); | |
3831 | goto out; | |
3832 | } | |
3833 | ||
3834 | /* Set access bits in stateid */ | |
3835 | old_access_bmap = stp->st_access_bmap; | |
3836 | set_access(open->op_share_access, stp); | |
3837 | ||
3838 | /* Set new deny mask */ | |
3839 | old_deny_bmap = stp->st_deny_bmap; | |
3840 | set_deny(open->op_share_deny, stp); | |
3841 | fp->fi_share_deny |= (open->op_share_deny & NFS4_SHARE_DENY_BOTH); | |
3842 | ||
f9d7562f | 3843 | if (!fp->fi_fds[oflag]) { |
de18643d TM |
3844 | spin_unlock(&fp->fi_lock); |
3845 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, &filp); | |
f9d7562f | 3846 | if (status) |
baeb4ff0 | 3847 | goto out_put_access; |
de18643d TM |
3848 | spin_lock(&fp->fi_lock); |
3849 | if (!fp->fi_fds[oflag]) { | |
3850 | fp->fi_fds[oflag] = filp; | |
3851 | filp = NULL; | |
3852 | } | |
f9d7562f | 3853 | } |
de18643d TM |
3854 | spin_unlock(&fp->fi_lock); |
3855 | if (filp) | |
3856 | fput(filp); | |
f9d7562f | 3857 | |
7e6a72e5 CH |
3858 | status = nfsd4_truncate(rqstp, cur_fh, open); |
3859 | if (status) | |
3860 | goto out_put_access; | |
7e6a72e5 CH |
3861 | out: |
3862 | return status; | |
baeb4ff0 JL |
3863 | out_put_access: |
3864 | stp->st_access_bmap = old_access_bmap; | |
3865 | nfs4_file_put_access(fp, open->op_share_access); | |
3866 | reset_union_bmap_deny(bmap_to_share_mode(old_deny_bmap), stp); | |
3867 | goto out; | |
1da177e4 LT |
3868 | } |
3869 | ||
b37ad28b | 3870 | static __be32 |
dcef0413 | 3871 | 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 | 3872 | { |
b37ad28b | 3873 | __be32 status; |
6ac75368 | 3874 | unsigned char old_deny_bmap = stp->st_deny_bmap; |
1da177e4 | 3875 | |
6eb3a1d0 | 3876 | if (!test_access(open->op_share_access, stp)) |
baeb4ff0 | 3877 | return nfs4_get_vfs_file(rqstp, fp, cur_fh, stp, open); |
7e6a72e5 | 3878 | |
baeb4ff0 JL |
3879 | /* test and set deny mode */ |
3880 | spin_lock(&fp->fi_lock); | |
3881 | status = nfs4_file_check_deny(fp, open->op_share_deny); | |
3882 | if (status == nfs_ok) { | |
baeb4ff0 JL |
3883 | set_deny(open->op_share_deny, stp); |
3884 | fp->fi_share_deny |= | |
3885 | (open->op_share_deny & NFS4_SHARE_DENY_BOTH); | |
3886 | } | |
3887 | spin_unlock(&fp->fi_lock); | |
3888 | ||
3889 | if (status != nfs_ok) | |
1da177e4 | 3890 | return status; |
1da177e4 | 3891 | |
baeb4ff0 JL |
3892 | status = nfsd4_truncate(rqstp, cur_fh, open); |
3893 | if (status != nfs_ok) | |
3894 | reset_union_bmap_deny(old_deny_bmap, stp); | |
3895 | return status; | |
3896 | } | |
1da177e4 | 3897 | |
1da177e4 | 3898 | static void |
1255a8f3 | 3899 | nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session) |
1da177e4 | 3900 | { |
dad1c067 | 3901 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
1da177e4 LT |
3902 | } |
3903 | ||
14a24e99 BF |
3904 | /* Should we give out recallable state?: */ |
3905 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
3906 | { | |
3907 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
3908 | return true; | |
3909 | /* | |
3910 | * In the sessions case, since we don't have to establish a | |
3911 | * separate connection for callbacks, we assume it's OK | |
3912 | * until we hear otherwise: | |
3913 | */ | |
3914 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
3915 | } | |
3916 | ||
d564fbec | 3917 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_file *fp, int flag) |
22d38c4c BF |
3918 | { |
3919 | struct file_lock *fl; | |
3920 | ||
3921 | fl = locks_alloc_lock(); | |
3922 | if (!fl) | |
3923 | return NULL; | |
22d38c4c | 3924 | fl->fl_lmops = &nfsd_lease_mng_ops; |
617588d5 | 3925 | fl->fl_flags = FL_DELEG; |
22d38c4c BF |
3926 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; |
3927 | fl->fl_end = OFFSET_MAX; | |
d564fbec | 3928 | fl->fl_owner = (fl_owner_t)fp; |
22d38c4c | 3929 | fl->fl_pid = current->tgid; |
22d38c4c BF |
3930 | return fl; |
3931 | } | |
3932 | ||
99c41515 | 3933 | static int nfs4_setlease(struct nfs4_delegation *dp) |
edab9782 | 3934 | { |
11b9164a | 3935 | struct nfs4_file *fp = dp->dl_stid.sc_file; |
415b96c5 | 3936 | struct file_lock *fl, *ret; |
417c6629 JL |
3937 | struct file *filp; |
3938 | int status = 0; | |
edab9782 | 3939 | |
d564fbec | 3940 | fl = nfs4_alloc_init_lease(fp, NFS4_OPEN_DELEGATE_READ); |
edab9782 BF |
3941 | if (!fl) |
3942 | return -ENOMEM; | |
417c6629 JL |
3943 | filp = find_readable_file(fp); |
3944 | if (!filp) { | |
3945 | /* We should always have a readable file here */ | |
3946 | WARN_ON_ONCE(1); | |
af9dbaf4 | 3947 | locks_free_lock(fl); |
417c6629 JL |
3948 | return -EBADF; |
3949 | } | |
3950 | fl->fl_file = filp; | |
415b96c5 | 3951 | ret = fl; |
e6f5c789 | 3952 | status = vfs_setlease(filp, fl->fl_type, &fl, NULL); |
1c7dd2ff | 3953 | if (fl) |
417c6629 | 3954 | locks_free_lock(fl); |
1c7dd2ff | 3955 | if (status) |
417c6629 | 3956 | goto out_fput; |
417c6629 JL |
3957 | spin_lock(&state_lock); |
3958 | spin_lock(&fp->fi_lock); | |
3959 | /* Did the lease get broken before we took the lock? */ | |
3960 | status = -EAGAIN; | |
3961 | if (fp->fi_had_conflict) | |
3962 | goto out_unlock; | |
3963 | /* Race breaker */ | |
0c637be8 | 3964 | if (fp->fi_deleg_file) { |
417c6629 | 3965 | status = 0; |
67db1034 | 3966 | ++fp->fi_delegees; |
417c6629 JL |
3967 | hash_delegation_locked(dp, fp); |
3968 | goto out_unlock; | |
3969 | } | |
417c6629 | 3970 | fp->fi_deleg_file = filp; |
67db1034 | 3971 | fp->fi_delegees = 1; |
931ee56c | 3972 | hash_delegation_locked(dp, fp); |
417c6629 | 3973 | spin_unlock(&fp->fi_lock); |
cdc97505 | 3974 | spin_unlock(&state_lock); |
acfdf5c3 | 3975 | return 0; |
417c6629 JL |
3976 | out_unlock: |
3977 | spin_unlock(&fp->fi_lock); | |
3978 | spin_unlock(&state_lock); | |
3979 | out_fput: | |
3980 | fput(filp); | |
e873088f | 3981 | return status; |
acfdf5c3 BF |
3982 | } |
3983 | ||
0b26693c JL |
3984 | static struct nfs4_delegation * |
3985 | nfs4_set_delegation(struct nfs4_client *clp, struct svc_fh *fh, | |
8287f009 | 3986 | struct nfs4_file *fp, struct nfs4_clnt_odstate *odstate) |
acfdf5c3 | 3987 | { |
0b26693c JL |
3988 | int status; |
3989 | struct nfs4_delegation *dp; | |
417c6629 | 3990 | |
bf7bd3e9 | 3991 | if (fp->fi_had_conflict) |
0b26693c JL |
3992 | return ERR_PTR(-EAGAIN); |
3993 | ||
8287f009 | 3994 | dp = alloc_init_deleg(clp, fh, odstate); |
0b26693c JL |
3995 | if (!dp) |
3996 | return ERR_PTR(-ENOMEM); | |
3997 | ||
bf7bd3e9 | 3998 | get_nfs4_file(fp); |
417c6629 JL |
3999 | spin_lock(&state_lock); |
4000 | spin_lock(&fp->fi_lock); | |
11b9164a | 4001 | dp->dl_stid.sc_file = fp; |
0c637be8 | 4002 | if (!fp->fi_deleg_file) { |
417c6629 JL |
4003 | spin_unlock(&fp->fi_lock); |
4004 | spin_unlock(&state_lock); | |
0b26693c JL |
4005 | status = nfs4_setlease(dp); |
4006 | goto out; | |
417c6629 | 4007 | } |
acfdf5c3 | 4008 | if (fp->fi_had_conflict) { |
417c6629 JL |
4009 | status = -EAGAIN; |
4010 | goto out_unlock; | |
acfdf5c3 | 4011 | } |
67db1034 | 4012 | ++fp->fi_delegees; |
931ee56c | 4013 | hash_delegation_locked(dp, fp); |
0b26693c | 4014 | status = 0; |
417c6629 JL |
4015 | out_unlock: |
4016 | spin_unlock(&fp->fi_lock); | |
cdc97505 | 4017 | spin_unlock(&state_lock); |
0b26693c JL |
4018 | out: |
4019 | if (status) { | |
8287f009 | 4020 | put_clnt_odstate(dp->dl_clnt_odstate); |
6011695d | 4021 | nfs4_put_stid(&dp->dl_stid); |
0b26693c JL |
4022 | return ERR_PTR(status); |
4023 | } | |
4024 | return dp; | |
edab9782 BF |
4025 | } |
4026 | ||
4aa8913c BH |
4027 | static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) |
4028 | { | |
4029 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
4030 | if (status == -EAGAIN) | |
4031 | open->op_why_no_deleg = WND4_CONTENTION; | |
4032 | else { | |
4033 | open->op_why_no_deleg = WND4_RESOURCE; | |
4034 | switch (open->op_deleg_want) { | |
4035 | case NFS4_SHARE_WANT_READ_DELEG: | |
4036 | case NFS4_SHARE_WANT_WRITE_DELEG: | |
4037 | case NFS4_SHARE_WANT_ANY_DELEG: | |
4038 | break; | |
4039 | case NFS4_SHARE_WANT_CANCEL: | |
4040 | open->op_why_no_deleg = WND4_CANCELLED; | |
4041 | break; | |
4042 | case NFS4_SHARE_WANT_NO_DELEG: | |
063b0fb9 | 4043 | WARN_ON_ONCE(1); |
4aa8913c BH |
4044 | } |
4045 | } | |
4046 | } | |
4047 | ||
1da177e4 LT |
4048 | /* |
4049 | * Attempt to hand out a delegation. | |
99c41515 BF |
4050 | * |
4051 | * Note we don't support write delegations, and won't until the vfs has | |
4052 | * proper support for them. | |
1da177e4 LT |
4053 | */ |
4054 | static void | |
4cf59221 JL |
4055 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, |
4056 | struct nfs4_ol_stateid *stp) | |
1da177e4 LT |
4057 | { |
4058 | struct nfs4_delegation *dp; | |
4cf59221 JL |
4059 | struct nfs4_openowner *oo = openowner(stp->st_stateowner); |
4060 | struct nfs4_client *clp = stp->st_stid.sc_client; | |
14a24e99 | 4061 | int cb_up; |
99c41515 | 4062 | int status = 0; |
1da177e4 | 4063 | |
fe0750e5 | 4064 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
7b190fec N |
4065 | open->op_recall = 0; |
4066 | switch (open->op_claim_type) { | |
4067 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 4068 | if (!cb_up) |
7b190fec | 4069 | open->op_recall = 1; |
99c41515 BF |
4070 | if (open->op_delegate_type != NFS4_OPEN_DELEGATE_READ) |
4071 | goto out_no_deleg; | |
7b190fec N |
4072 | break; |
4073 | case NFS4_OPEN_CLAIM_NULL: | |
ed47b062 | 4074 | case NFS4_OPEN_CLAIM_FH: |
99c41515 BF |
4075 | /* |
4076 | * Let's not give out any delegations till everyone's | |
4077 | * had the chance to reclaim theirs.... | |
4078 | */ | |
4cf59221 | 4079 | if (locks_in_grace(clp->net)) |
99c41515 | 4080 | goto out_no_deleg; |
dad1c067 | 4081 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
99c41515 | 4082 | goto out_no_deleg; |
9a0590ae SD |
4083 | /* |
4084 | * Also, if the file was opened for write or | |
4085 | * create, there's a good chance the client's | |
4086 | * about to write to it, resulting in an | |
4087 | * immediate recall (since we don't support | |
4088 | * write delegations): | |
4089 | */ | |
7b190fec | 4090 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
99c41515 BF |
4091 | goto out_no_deleg; |
4092 | if (open->op_create == NFS4_OPEN_CREATE) | |
4093 | goto out_no_deleg; | |
7b190fec N |
4094 | break; |
4095 | default: | |
99c41515 | 4096 | goto out_no_deleg; |
7b190fec | 4097 | } |
8287f009 | 4098 | dp = nfs4_set_delegation(clp, fh, stp->st_stid.sc_file, stp->st_clnt_odstate); |
0b26693c | 4099 | if (IS_ERR(dp)) |
dd239cc0 | 4100 | goto out_no_deleg; |
1da177e4 | 4101 | |
d5477a8d | 4102 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 4103 | |
8c10cbdb | 4104 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
d5477a8d | 4105 | STATEID_VAL(&dp->dl_stid.sc_stateid)); |
99c41515 | 4106 | open->op_delegate_type = NFS4_OPEN_DELEGATE_READ; |
67cb1279 | 4107 | nfs4_put_stid(&dp->dl_stid); |
dd239cc0 | 4108 | return; |
dd239cc0 | 4109 | out_no_deleg: |
99c41515 BF |
4110 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE; |
4111 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && | |
d08d32e6 | 4112 | open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) { |
99c41515 | 4113 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
d08d32e6 BF |
4114 | open->op_recall = 1; |
4115 | } | |
99c41515 BF |
4116 | |
4117 | /* 4.1 client asking for a delegation? */ | |
4118 | if (open->op_deleg_want) | |
4119 | nfsd4_open_deleg_none_ext(open, status); | |
4120 | return; | |
1da177e4 LT |
4121 | } |
4122 | ||
e27f49c3 BH |
4123 | static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, |
4124 | struct nfs4_delegation *dp) | |
4125 | { | |
4126 | if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && | |
4127 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
4128 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
4129 | open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; | |
4130 | } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && | |
4131 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
4132 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
4133 | open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; | |
4134 | } | |
4135 | /* Otherwise the client must be confused wanting a delegation | |
4136 | * it already has, therefore we don't return | |
4137 | * NFS4_OPEN_DELEGATE_NONE_EXT and reason. | |
4138 | */ | |
4139 | } | |
4140 | ||
b37ad28b | 4141 | __be32 |
1da177e4 LT |
4142 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
4143 | { | |
6668958f | 4144 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
38c2f4b1 | 4145 | struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; |
1da177e4 | 4146 | struct nfs4_file *fp = NULL; |
dcef0413 | 4147 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 4148 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 4149 | __be32 status; |
1da177e4 | 4150 | |
1da177e4 LT |
4151 | /* |
4152 | * Lookup file; if found, lookup stateid and check open request, | |
4153 | * and check for delegations in the process of being recalled. | |
4154 | * If not found, create the nfs4_file struct | |
4155 | */ | |
f9c00c3a | 4156 | fp = find_or_add_file(open->op_file, ¤t_fh->fh_handle); |
950e0118 | 4157 | if (fp != open->op_file) { |
41d22663 | 4158 | status = nfs4_check_deleg(cl, open, &dp); |
c44c5eeb N |
4159 | if (status) |
4160 | goto out; | |
a46cb7f2 | 4161 | stp = nfsd4_find_existing_open(fp, open); |
1da177e4 | 4162 | } else { |
950e0118 | 4163 | open->op_file = NULL; |
c44c5eeb | 4164 | status = nfserr_bad_stateid; |
8b289b2c | 4165 | if (nfsd4_is_deleg_cur(open)) |
c44c5eeb | 4166 | goto out; |
1da177e4 LT |
4167 | } |
4168 | ||
4169 | /* | |
4170 | * OPEN the file, or upgrade an existing OPEN. | |
4171 | * If truncate fails, the OPEN fails. | |
4172 | */ | |
4173 | if (stp) { | |
4174 | /* Stateid was found, this is an OPEN upgrade */ | |
f9d7562f | 4175 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
1da177e4 LT |
4176 | if (status) |
4177 | goto out; | |
4178 | } else { | |
4cdc951b BF |
4179 | stp = open->op_stp; |
4180 | open->op_stp = NULL; | |
996e0938 | 4181 | init_open_stateid(stp, fp, open); |
6eb3a1d0 JL |
4182 | status = nfs4_get_vfs_file(rqstp, fp, current_fh, stp, open); |
4183 | if (status) { | |
4184 | release_open_stateid(stp); | |
4185 | goto out; | |
4186 | } | |
8287f009 SB |
4187 | |
4188 | stp->st_clnt_odstate = find_or_hash_clnt_odstate(fp, | |
4189 | open->op_odstate); | |
4190 | if (stp->st_clnt_odstate == open->op_odstate) | |
4191 | open->op_odstate = NULL; | |
1da177e4 | 4192 | } |
dcef0413 BF |
4193 | update_stateid(&stp->st_stid.sc_stateid); |
4194 | memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 4195 | |
d24433cd | 4196 | if (nfsd4_has_session(&resp->cstate)) { |
d24433cd BH |
4197 | if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { |
4198 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
4199 | open->op_why_no_deleg = WND4_NOT_WANTED; | |
4200 | goto nodeleg; | |
4201 | } | |
4202 | } | |
4203 | ||
1da177e4 LT |
4204 | /* |
4205 | * Attempt to hand out a delegation. No error return, because the | |
4206 | * OPEN succeeds even if we fail. | |
4207 | */ | |
4cf59221 | 4208 | nfs4_open_delegation(current_fh, open, stp); |
d24433cd | 4209 | nodeleg: |
1da177e4 LT |
4210 | status = nfs_ok; |
4211 | ||
8c10cbdb | 4212 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
dcef0413 | 4213 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
1da177e4 | 4214 | out: |
d24433cd BH |
4215 | /* 4.1 client trying to upgrade/downgrade delegation? */ |
4216 | if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && | |
e27f49c3 BH |
4217 | open->op_deleg_want) |
4218 | nfsd4_deleg_xgrade_none_ext(open, dp); | |
d24433cd | 4219 | |
13cd2184 N |
4220 | if (fp) |
4221 | put_nfs4_file(fp); | |
37515177 | 4222 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
1255a8f3 | 4223 | nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate)); |
1da177e4 LT |
4224 | /* |
4225 | * To finish the open response, we just need to set the rflags. | |
4226 | */ | |
4227 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
dad1c067 | 4228 | if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && |
6668958f | 4229 | !nfsd4_has_session(&resp->cstate)) |
1da177e4 | 4230 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
dcd94cc2 TM |
4231 | if (dp) |
4232 | nfs4_put_stid(&dp->dl_stid); | |
d6f2bc5d TM |
4233 | if (stp) |
4234 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 LT |
4235 | |
4236 | return status; | |
4237 | } | |
4238 | ||
58fb12e6 | 4239 | void nfsd4_cleanup_open_state(struct nfsd4_compound_state *cstate, |
42297899 | 4240 | struct nfsd4_open *open) |
d29b20cd BF |
4241 | { |
4242 | if (open->op_openowner) { | |
d3134b10 JL |
4243 | struct nfs4_stateowner *so = &open->op_openowner->oo_owner; |
4244 | ||
4245 | nfsd4_cstate_assign_replay(cstate, so); | |
4246 | nfs4_put_stateowner(so); | |
d29b20cd | 4247 | } |
32513b40 | 4248 | if (open->op_file) |
5b095e99 | 4249 | kmem_cache_free(file_slab, open->op_file); |
4cdc951b | 4250 | if (open->op_stp) |
6011695d | 4251 | nfs4_put_stid(&open->op_stp->st_stid); |
8287f009 SB |
4252 | if (open->op_odstate) |
4253 | kmem_cache_free(odstate_slab, open->op_odstate); | |
d29b20cd BF |
4254 | } |
4255 | ||
b37ad28b | 4256 | __be32 |
b591480b BF |
4257 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4258 | clientid_t *clid) | |
1da177e4 LT |
4259 | { |
4260 | struct nfs4_client *clp; | |
b37ad28b | 4261 | __be32 status; |
7f2210fa | 4262 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4263 | |
1da177e4 LT |
4264 | dprintk("process_renew(%08x/%08x): starting\n", |
4265 | clid->cl_boot, clid->cl_id); | |
4b24ca7d | 4266 | status = lookup_clientid(clid, cstate, nn); |
9b2ef62b | 4267 | if (status) |
1da177e4 | 4268 | goto out; |
4b24ca7d | 4269 | clp = cstate->clp; |
1da177e4 | 4270 | status = nfserr_cb_path_down; |
ea1da636 | 4271 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 4272 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
4273 | goto out; |
4274 | status = nfs_ok; | |
4275 | out: | |
1da177e4 LT |
4276 | return status; |
4277 | } | |
4278 | ||
7f5ef2e9 | 4279 | void |
12760c66 | 4280 | nfsd4_end_grace(struct nfsd_net *nn) |
a76b4319 | 4281 | { |
33dcc481 | 4282 | /* do nothing if grace period already ended */ |
a51c84ed | 4283 | if (nn->grace_ended) |
33dcc481 JL |
4284 | return; |
4285 | ||
a76b4319 | 4286 | dprintk("NFSD: end of grace period\n"); |
a51c84ed | 4287 | nn->grace_ended = true; |
70b28235 BF |
4288 | /* |
4289 | * If the server goes down again right now, an NFSv4 | |
4290 | * client will still be allowed to reclaim after it comes back up, | |
4291 | * even if it hasn't yet had a chance to reclaim state this time. | |
4292 | * | |
4293 | */ | |
919b8049 | 4294 | nfsd4_record_grace_done(nn); |
70b28235 BF |
4295 | /* |
4296 | * At this point, NFSv4 clients can still reclaim. But if the | |
4297 | * server crashes, any that have not yet reclaimed will be out | |
4298 | * of luck on the next boot. | |
4299 | * | |
4300 | * (NFSv4.1+ clients are considered to have reclaimed once they | |
4301 | * call RECLAIM_COMPLETE. NFSv4.0 clients are considered to | |
4302 | * have reclaimed after their first OPEN.) | |
4303 | */ | |
5e1533c7 | 4304 | locks_end_grace(&nn->nfsd4_manager); |
70b28235 BF |
4305 | /* |
4306 | * At this point, and once lockd and/or any other containers | |
4307 | * exit their grace period, further reclaims will fail and | |
4308 | * regular locking can resume. | |
4309 | */ | |
a76b4319 N |
4310 | } |
4311 | ||
fd39ca9a | 4312 | static time_t |
09121281 | 4313 | nfs4_laundromat(struct nfsd_net *nn) |
1da177e4 LT |
4314 | { |
4315 | struct nfs4_client *clp; | |
fe0750e5 | 4316 | struct nfs4_openowner *oo; |
1da177e4 | 4317 | struct nfs4_delegation *dp; |
217526e7 | 4318 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4319 | struct list_head *pos, *next, reaplist; |
3d733711 | 4320 | time_t cutoff = get_seconds() - nn->nfsd4_lease; |
a832e7ae | 4321 | time_t t, new_timeo = nn->nfsd4_lease; |
1da177e4 | 4322 | |
1da177e4 | 4323 | dprintk("NFSD: laundromat service - starting\n"); |
12760c66 | 4324 | nfsd4_end_grace(nn); |
36acb66b | 4325 | INIT_LIST_HEAD(&reaplist); |
c9a49628 | 4326 | spin_lock(&nn->client_lock); |
5ed58bb2 | 4327 | list_for_each_safe(pos, next, &nn->client_lru) { |
1da177e4 LT |
4328 | clp = list_entry(pos, struct nfs4_client, cl_lru); |
4329 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
4330 | t = clp->cl_time - cutoff; | |
a832e7ae | 4331 | new_timeo = min(new_timeo, t); |
1da177e4 LT |
4332 | break; |
4333 | } | |
221a6876 | 4334 | if (mark_client_expired_locked(clp)) { |
d7682988 BH |
4335 | dprintk("NFSD: client in use (clientid %08x)\n", |
4336 | clp->cl_clientid.cl_id); | |
4337 | continue; | |
4338 | } | |
4864af97 | 4339 | list_add(&clp->cl_lru, &reaplist); |
36acb66b | 4340 | } |
c9a49628 | 4341 | spin_unlock(&nn->client_lock); |
36acb66b BH |
4342 | list_for_each_safe(pos, next, &reaplist) { |
4343 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
4344 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
4345 | clp->cl_clientid.cl_id); | |
4864af97 | 4346 | list_del_init(&clp->cl_lru); |
1da177e4 LT |
4347 | expire_client(clp); |
4348 | } | |
cdc97505 | 4349 | spin_lock(&state_lock); |
e8c69d17 | 4350 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 | 4351 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
4e37a7c2 SK |
4352 | if (net_generic(dp->dl_stid.sc_client->net, nfsd_net_id) != nn) |
4353 | continue; | |
1da177e4 | 4354 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { |
a832e7ae JL |
4355 | t = dp->dl_time - cutoff; |
4356 | new_timeo = min(new_timeo, t); | |
1da177e4 LT |
4357 | break; |
4358 | } | |
42690676 JL |
4359 | unhash_delegation_locked(dp); |
4360 | list_add(&dp->dl_recall_lru, &reaplist); | |
1da177e4 | 4361 | } |
cdc97505 | 4362 | spin_unlock(&state_lock); |
2d4a532d JL |
4363 | while (!list_empty(&reaplist)) { |
4364 | dp = list_first_entry(&reaplist, struct nfs4_delegation, | |
4365 | dl_recall_lru); | |
4366 | list_del_init(&dp->dl_recall_lru); | |
3bd64a5b | 4367 | revoke_delegation(dp); |
1da177e4 | 4368 | } |
217526e7 JL |
4369 | |
4370 | spin_lock(&nn->client_lock); | |
4371 | while (!list_empty(&nn->close_lru)) { | |
4372 | oo = list_first_entry(&nn->close_lru, struct nfs4_openowner, | |
4373 | oo_close_lru); | |
4374 | if (time_after((unsigned long)oo->oo_time, | |
4375 | (unsigned long)cutoff)) { | |
a832e7ae JL |
4376 | t = oo->oo_time - cutoff; |
4377 | new_timeo = min(new_timeo, t); | |
1da177e4 LT |
4378 | break; |
4379 | } | |
217526e7 JL |
4380 | list_del_init(&oo->oo_close_lru); |
4381 | stp = oo->oo_last_closed_stid; | |
4382 | oo->oo_last_closed_stid = NULL; | |
4383 | spin_unlock(&nn->client_lock); | |
4384 | nfs4_put_stid(&stp->st_stid); | |
4385 | spin_lock(&nn->client_lock); | |
1da177e4 | 4386 | } |
217526e7 JL |
4387 | spin_unlock(&nn->client_lock); |
4388 | ||
a832e7ae | 4389 | new_timeo = max_t(time_t, new_timeo, NFSD_LAUNDROMAT_MINTIMEOUT); |
a832e7ae | 4390 | return new_timeo; |
1da177e4 LT |
4391 | } |
4392 | ||
a254b246 HH |
4393 | static struct workqueue_struct *laundry_wq; |
4394 | static void laundromat_main(struct work_struct *); | |
a254b246 HH |
4395 | |
4396 | static void | |
09121281 | 4397 | laundromat_main(struct work_struct *laundry) |
1da177e4 LT |
4398 | { |
4399 | time_t t; | |
09121281 SK |
4400 | struct delayed_work *dwork = container_of(laundry, struct delayed_work, |
4401 | work); | |
4402 | struct nfsd_net *nn = container_of(dwork, struct nfsd_net, | |
4403 | laundromat_work); | |
1da177e4 | 4404 | |
09121281 | 4405 | t = nfs4_laundromat(nn); |
1da177e4 | 4406 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); |
09121281 | 4407 | queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ); |
1da177e4 LT |
4408 | } |
4409 | ||
f7a4d872 | 4410 | static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) |
1da177e4 | 4411 | { |
4d94c2ef | 4412 | if (!fh_match(&fhp->fh_handle, &stp->st_stid.sc_file->fi_fhandle)) |
f7a4d872 BF |
4413 | return nfserr_bad_stateid; |
4414 | return nfs_ok; | |
1da177e4 LT |
4415 | } |
4416 | ||
1da177e4 | 4417 | static inline int |
82c5ff1b | 4418 | access_permit_read(struct nfs4_ol_stateid *stp) |
1da177e4 | 4419 | { |
82c5ff1b JL |
4420 | return test_access(NFS4_SHARE_ACCESS_READ, stp) || |
4421 | test_access(NFS4_SHARE_ACCESS_BOTH, stp) || | |
4422 | test_access(NFS4_SHARE_ACCESS_WRITE, stp); | |
1da177e4 LT |
4423 | } |
4424 | ||
4425 | static inline int | |
82c5ff1b | 4426 | access_permit_write(struct nfs4_ol_stateid *stp) |
1da177e4 | 4427 | { |
82c5ff1b JL |
4428 | return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || |
4429 | test_access(NFS4_SHARE_ACCESS_BOTH, stp); | |
1da177e4 LT |
4430 | } |
4431 | ||
4432 | static | |
dcef0413 | 4433 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
1da177e4 | 4434 | { |
b37ad28b | 4435 | __be32 status = nfserr_openmode; |
1da177e4 | 4436 | |
02921914 BF |
4437 | /* For lock stateid's, we test the parent open, not the lock: */ |
4438 | if (stp->st_openstp) | |
4439 | stp = stp->st_openstp; | |
82c5ff1b | 4440 | if ((flags & WR_STATE) && !access_permit_write(stp)) |
1da177e4 | 4441 | goto out; |
82c5ff1b | 4442 | if ((flags & RD_STATE) && !access_permit_read(stp)) |
1da177e4 LT |
4443 | goto out; |
4444 | status = nfs_ok; | |
4445 | out: | |
4446 | return status; | |
4447 | } | |
4448 | ||
b37ad28b | 4449 | static inline __be32 |
5ccb0066 | 4450 | check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags) |
1da177e4 | 4451 | { |
203a8c8e | 4452 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 4453 | return nfs_ok; |
5ccb0066 | 4454 | else if (locks_in_grace(net)) { |
25985edc | 4455 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
4456 | * conflicting state; so we must wait out the grace period. */ |
4457 | return nfserr_grace; | |
4458 | } else if (flags & WR_STATE) | |
4459 | return nfs4_share_conflict(current_fh, | |
4460 | NFS4_SHARE_DENY_WRITE); | |
4461 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
4462 | return nfs4_share_conflict(current_fh, | |
4463 | NFS4_SHARE_DENY_READ); | |
4464 | } | |
4465 | ||
4466 | /* | |
4467 | * Allow READ/WRITE during grace period on recovered state only for files | |
4468 | * that are not able to provide mandatory locking. | |
4469 | */ | |
4470 | static inline int | |
5ccb0066 | 4471 | grace_disallows_io(struct net *net, struct inode *inode) |
1da177e4 | 4472 | { |
5ccb0066 | 4473 | return locks_in_grace(net) && mandatory_lock(inode); |
1da177e4 LT |
4474 | } |
4475 | ||
81b82965 BF |
4476 | /* Returns true iff a is later than b: */ |
4477 | static bool stateid_generation_after(stateid_t *a, stateid_t *b) | |
4478 | { | |
1a9357f4 | 4479 | return (s32)(a->si_generation - b->si_generation) > 0; |
81b82965 BF |
4480 | } |
4481 | ||
57b7b43b | 4482 | static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 4483 | { |
6668958f AA |
4484 | /* |
4485 | * When sessions are used the stateid generation number is ignored | |
4486 | * when it is zero. | |
4487 | */ | |
28dde241 | 4488 | if (has_session && in->si_generation == 0) |
81b82965 BF |
4489 | return nfs_ok; |
4490 | ||
4491 | if (in->si_generation == ref->si_generation) | |
4492 | return nfs_ok; | |
6668958f | 4493 | |
0836f587 | 4494 | /* If the client sends us a stateid from the future, it's buggy: */ |
81b82965 | 4495 | if (stateid_generation_after(in, ref)) |
0836f587 BF |
4496 | return nfserr_bad_stateid; |
4497 | /* | |
81b82965 BF |
4498 | * However, we could see a stateid from the past, even from a |
4499 | * non-buggy client. For example, if the client sends a lock | |
4500 | * while some IO is outstanding, the lock may bump si_generation | |
4501 | * while the IO is still in flight. The client could avoid that | |
4502 | * situation by waiting for responses on all the IO requests, | |
4503 | * but better performance may result in retrying IO that | |
4504 | * receives an old_stateid error if requests are rarely | |
4505 | * reordered in flight: | |
0836f587 | 4506 | */ |
81b82965 | 4507 | return nfserr_old_stateid; |
0836f587 BF |
4508 | } |
4509 | ||
ebe9cb3b CH |
4510 | static __be32 nfsd4_check_openowner_confirmed(struct nfs4_ol_stateid *ols) |
4511 | { | |
4512 | if (ols->st_stateowner->so_is_open_owner && | |
4513 | !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) | |
4514 | return nfserr_bad_stateid; | |
4515 | return nfs_ok; | |
4516 | } | |
4517 | ||
7df302f7 | 4518 | static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) |
17456804 | 4519 | { |
97b7e3b6 | 4520 | struct nfs4_stid *s; |
1af71cc8 | 4521 | __be32 status = nfserr_bad_stateid; |
17456804 | 4522 | |
7df302f7 | 4523 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
1af71cc8 | 4524 | return status; |
7df302f7 CL |
4525 | /* Client debugging aid. */ |
4526 | if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) { | |
4527 | char addr_str[INET6_ADDRSTRLEN]; | |
4528 | rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str, | |
4529 | sizeof(addr_str)); | |
4530 | pr_warn_ratelimited("NFSD: client %s testing state ID " | |
4531 | "with incorrect client ID\n", addr_str); | |
1af71cc8 | 4532 | return status; |
7df302f7 | 4533 | } |
1af71cc8 JL |
4534 | spin_lock(&cl->cl_lock); |
4535 | s = find_stateid_locked(cl, stateid); | |
97b7e3b6 | 4536 | if (!s) |
1af71cc8 | 4537 | goto out_unlock; |
36279ac1 | 4538 | status = check_stateid_generation(stateid, &s->sc_stateid, 1); |
17456804 | 4539 | if (status) |
1af71cc8 | 4540 | goto out_unlock; |
23340032 BF |
4541 | switch (s->sc_type) { |
4542 | case NFS4_DELEG_STID: | |
1af71cc8 JL |
4543 | status = nfs_ok; |
4544 | break; | |
3bd64a5b | 4545 | case NFS4_REVOKED_DELEG_STID: |
1af71cc8 JL |
4546 | status = nfserr_deleg_revoked; |
4547 | break; | |
23340032 BF |
4548 | case NFS4_OPEN_STID: |
4549 | case NFS4_LOCK_STID: | |
ebe9cb3b | 4550 | status = nfsd4_check_openowner_confirmed(openlockstateid(s)); |
1af71cc8 | 4551 | break; |
23340032 BF |
4552 | default: |
4553 | printk("unknown stateid type %x\n", s->sc_type); | |
b0fc29d6 | 4554 | /* Fallthrough */ |
23340032 | 4555 | case NFS4_CLOSED_STID: |
b0fc29d6 | 4556 | case NFS4_CLOSED_DELEG_STID: |
1af71cc8 | 4557 | status = nfserr_bad_stateid; |
23340032 | 4558 | } |
1af71cc8 JL |
4559 | out_unlock: |
4560 | spin_unlock(&cl->cl_lock); | |
4561 | return status; | |
17456804 BS |
4562 | } |
4563 | ||
cd61c522 | 4564 | __be32 |
2dd6e458 TM |
4565 | nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate, |
4566 | stateid_t *stateid, unsigned char typemask, | |
4567 | struct nfs4_stid **s, struct nfsd_net *nn) | |
38c2f4b1 | 4568 | { |
0eb6f20a | 4569 | __be32 status; |
38c2f4b1 BF |
4570 | |
4571 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
4572 | return nfserr_bad_stateid; | |
4b24ca7d | 4573 | status = lookup_clientid(&stateid->si_opaque.so_clid, cstate, nn); |
a8a7c677 | 4574 | if (status == nfserr_stale_clientid) { |
4b24ca7d | 4575 | if (cstate->session) |
a8a7c677 | 4576 | return nfserr_bad_stateid; |
38c2f4b1 | 4577 | return nfserr_stale_stateid; |
a8a7c677 | 4578 | } |
0eb6f20a BF |
4579 | if (status) |
4580 | return status; | |
4b24ca7d | 4581 | *s = find_stateid_by_type(cstate->clp, stateid, typemask); |
38c2f4b1 BF |
4582 | if (!*s) |
4583 | return nfserr_bad_stateid; | |
4584 | return nfs_ok; | |
38c2f4b1 BF |
4585 | } |
4586 | ||
a0649b2d CH |
4587 | static struct file * |
4588 | nfs4_find_file(struct nfs4_stid *s, int flags) | |
4589 | { | |
af90f707 CH |
4590 | if (!s) |
4591 | return NULL; | |
4592 | ||
a0649b2d CH |
4593 | switch (s->sc_type) { |
4594 | case NFS4_DELEG_STID: | |
4595 | if (WARN_ON_ONCE(!s->sc_file->fi_deleg_file)) | |
4596 | return NULL; | |
4597 | return get_file(s->sc_file->fi_deleg_file); | |
4598 | case NFS4_OPEN_STID: | |
4599 | case NFS4_LOCK_STID: | |
4600 | if (flags & RD_STATE) | |
4601 | return find_readable_file(s->sc_file); | |
4602 | else | |
4603 | return find_writeable_file(s->sc_file); | |
4604 | break; | |
4605 | } | |
4606 | ||
4607 | return NULL; | |
4608 | } | |
4609 | ||
4610 | static __be32 | |
4611 | nfs4_check_olstateid(struct svc_fh *fhp, struct nfs4_ol_stateid *ols, int flags) | |
4612 | { | |
4613 | __be32 status; | |
4614 | ||
4615 | status = nfs4_check_fh(fhp, ols); | |
4616 | if (status) | |
4617 | return status; | |
4618 | status = nfsd4_check_openowner_confirmed(ols); | |
4619 | if (status) | |
4620 | return status; | |
4621 | return nfs4_check_openmode(ols, flags); | |
4622 | } | |
4623 | ||
af90f707 CH |
4624 | static __be32 |
4625 | nfs4_check_file(struct svc_rqst *rqstp, struct svc_fh *fhp, struct nfs4_stid *s, | |
4626 | struct file **filpp, bool *tmp_file, int flags) | |
4627 | { | |
4628 | int acc = (flags & RD_STATE) ? NFSD_MAY_READ : NFSD_MAY_WRITE; | |
4629 | struct file *file; | |
4630 | __be32 status; | |
4631 | ||
4632 | file = nfs4_find_file(s, flags); | |
4633 | if (file) { | |
4634 | status = nfsd_permission(rqstp, fhp->fh_export, fhp->fh_dentry, | |
4635 | acc | NFSD_MAY_OWNER_OVERRIDE); | |
4636 | if (status) { | |
4637 | fput(file); | |
4638 | return status; | |
4639 | } | |
4640 | ||
4641 | *filpp = file; | |
4642 | } else { | |
4643 | status = nfsd_open(rqstp, fhp, S_IFREG, acc, filpp); | |
4644 | if (status) | |
4645 | return status; | |
4646 | ||
4647 | if (tmp_file) | |
4648 | *tmp_file = true; | |
4649 | } | |
4650 | ||
4651 | return 0; | |
4652 | } | |
4653 | ||
1da177e4 | 4654 | /* |
a0649b2d CH |
4655 | * Checks for stateid operations |
4656 | */ | |
b37ad28b | 4657 | __be32 |
af90f707 CH |
4658 | nfs4_preprocess_stateid_op(struct svc_rqst *rqstp, |
4659 | struct nfsd4_compound_state *cstate, stateid_t *stateid, | |
4660 | int flags, struct file **filpp, bool *tmp_file) | |
1da177e4 | 4661 | { |
a0649b2d CH |
4662 | struct svc_fh *fhp = &cstate->current_fh; |
4663 | struct inode *ino = d_inode(fhp->fh_dentry); | |
af90f707 | 4664 | struct net *net = SVC_NET(rqstp); |
3320fef1 | 4665 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
af90f707 | 4666 | struct nfs4_stid *s = NULL; |
b37ad28b | 4667 | __be32 status; |
1da177e4 | 4668 | |
1da177e4 LT |
4669 | if (filpp) |
4670 | *filpp = NULL; | |
af90f707 CH |
4671 | if (tmp_file) |
4672 | *tmp_file = false; | |
1da177e4 | 4673 | |
5ccb0066 | 4674 | if (grace_disallows_io(net, ino)) |
1da177e4 LT |
4675 | return nfserr_grace; |
4676 | ||
af90f707 CH |
4677 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { |
4678 | status = check_special_stateids(net, fhp, stateid, flags); | |
4679 | goto done; | |
4680 | } | |
1da177e4 | 4681 | |
2dd6e458 | 4682 | status = nfsd4_lookup_stateid(cstate, stateid, |
db24b3b4 | 4683 | NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, |
2dd6e458 | 4684 | &s, nn); |
38c2f4b1 | 4685 | if (status) |
c2d1d6a8 | 4686 | return status; |
a0649b2d CH |
4687 | status = check_stateid_generation(stateid, &s->sc_stateid, |
4688 | nfsd4_has_session(cstate)); | |
69064a27 BF |
4689 | if (status) |
4690 | goto out; | |
a0649b2d | 4691 | |
f7a4d872 BF |
4692 | switch (s->sc_type) { |
4693 | case NFS4_DELEG_STID: | |
a0649b2d | 4694 | status = nfs4_check_delegmode(delegstateid(s), flags); |
f7a4d872 BF |
4695 | break; |
4696 | case NFS4_OPEN_STID: | |
4697 | case NFS4_LOCK_STID: | |
a0649b2d | 4698 | status = nfs4_check_olstateid(fhp, openlockstateid(s), flags); |
f7a4d872 BF |
4699 | break; |
4700 | default: | |
14bcab1a | 4701 | status = nfserr_bad_stateid; |
a0649b2d CH |
4702 | break; |
4703 | } | |
4704 | ||
af90f707 CH |
4705 | done: |
4706 | if (!status && filpp) | |
4707 | status = nfs4_check_file(rqstp, fhp, s, filpp, tmp_file, flags); | |
1da177e4 | 4708 | out: |
af90f707 CH |
4709 | if (s) |
4710 | nfs4_put_stid(s); | |
1da177e4 LT |
4711 | return status; |
4712 | } | |
4713 | ||
17456804 BS |
4714 | /* |
4715 | * Test if the stateid is valid | |
4716 | */ | |
4717 | __be32 | |
4718 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
4719 | struct nfsd4_test_stateid *test_stateid) | |
4720 | { | |
03cfb420 BS |
4721 | struct nfsd4_test_stateid_id *stateid; |
4722 | struct nfs4_client *cl = cstate->session->se_client; | |
4723 | ||
03cfb420 | 4724 | list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) |
7df302f7 CL |
4725 | stateid->ts_id_status = |
4726 | nfsd4_validate_stateid(cl, &stateid->ts_id_stateid); | |
03cfb420 | 4727 | |
17456804 BS |
4728 | return nfs_ok; |
4729 | } | |
4730 | ||
e1ca12df BS |
4731 | __be32 |
4732 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
4733 | struct nfsd4_free_stateid *free_stateid) | |
4734 | { | |
4735 | stateid_t *stateid = &free_stateid->fr_stateid; | |
2da1cec7 | 4736 | struct nfs4_stid *s; |
3bd64a5b | 4737 | struct nfs4_delegation *dp; |
fc5a96c3 | 4738 | struct nfs4_ol_stateid *stp; |
38c2f4b1 | 4739 | struct nfs4_client *cl = cstate->session->se_client; |
2da1cec7 | 4740 | __be32 ret = nfserr_bad_stateid; |
e1ca12df | 4741 | |
1af71cc8 JL |
4742 | spin_lock(&cl->cl_lock); |
4743 | s = find_stateid_locked(cl, stateid); | |
2da1cec7 | 4744 | if (!s) |
1af71cc8 | 4745 | goto out_unlock; |
2da1cec7 BF |
4746 | switch (s->sc_type) { |
4747 | case NFS4_DELEG_STID: | |
e1ca12df | 4748 | ret = nfserr_locks_held; |
1af71cc8 | 4749 | break; |
2da1cec7 | 4750 | case NFS4_OPEN_STID: |
2da1cec7 BF |
4751 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); |
4752 | if (ret) | |
1af71cc8 JL |
4753 | break; |
4754 | ret = nfserr_locks_held; | |
f7a4d872 | 4755 | break; |
1af71cc8 JL |
4756 | case NFS4_LOCK_STID: |
4757 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); | |
4758 | if (ret) | |
4759 | break; | |
fc5a96c3 JL |
4760 | stp = openlockstateid(s); |
4761 | ret = nfserr_locks_held; | |
4762 | if (check_for_locks(stp->st_stid.sc_file, | |
4763 | lockowner(stp->st_stateowner))) | |
4764 | break; | |
4765 | unhash_lock_stateid(stp); | |
1af71cc8 | 4766 | spin_unlock(&cl->cl_lock); |
fc5a96c3 JL |
4767 | nfs4_put_stid(s); |
4768 | ret = nfs_ok; | |
1af71cc8 | 4769 | goto out; |
3bd64a5b BF |
4770 | case NFS4_REVOKED_DELEG_STID: |
4771 | dp = delegstateid(s); | |
2d4a532d JL |
4772 | list_del_init(&dp->dl_recall_lru); |
4773 | spin_unlock(&cl->cl_lock); | |
6011695d | 4774 | nfs4_put_stid(s); |
3bd64a5b | 4775 | ret = nfs_ok; |
1af71cc8 JL |
4776 | goto out; |
4777 | /* Default falls through and returns nfserr_bad_stateid */ | |
e1ca12df | 4778 | } |
1af71cc8 JL |
4779 | out_unlock: |
4780 | spin_unlock(&cl->cl_lock); | |
e1ca12df | 4781 | out: |
e1ca12df BS |
4782 | return ret; |
4783 | } | |
4784 | ||
4c4cd222 N |
4785 | static inline int |
4786 | setlkflg (int type) | |
4787 | { | |
4788 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
4789 | RD_STATE : WR_STATE; | |
4790 | } | |
1da177e4 | 4791 | |
dcef0413 | 4792 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
c0a5d93e BF |
4793 | { |
4794 | struct svc_fh *current_fh = &cstate->current_fh; | |
4795 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
4796 | __be32 status; | |
4797 | ||
c0a5d93e BF |
4798 | status = nfsd4_check_seqid(cstate, sop, seqid); |
4799 | if (status) | |
4800 | return status; | |
3bd64a5b BF |
4801 | if (stp->st_stid.sc_type == NFS4_CLOSED_STID |
4802 | || stp->st_stid.sc_type == NFS4_REVOKED_DELEG_STID) | |
f7a4d872 BF |
4803 | /* |
4804 | * "Closed" stateid's exist *only* to return | |
3bd64a5b BF |
4805 | * nfserr_replay_me from the previous step, and |
4806 | * revoked delegations are kept only for free_stateid. | |
f7a4d872 BF |
4807 | */ |
4808 | return nfserr_bad_stateid; | |
4809 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); | |
4810 | if (status) | |
4811 | return status; | |
4812 | return nfs4_check_fh(current_fh, stp); | |
c0a5d93e BF |
4813 | } |
4814 | ||
1da177e4 LT |
4815 | /* |
4816 | * Checks for sequence id mutating operations. | |
4817 | */ | |
b37ad28b | 4818 | static __be32 |
dd453dfd | 4819 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2288d0e3 | 4820 | stateid_t *stateid, char typemask, |
3320fef1 SK |
4821 | struct nfs4_ol_stateid **stpp, |
4822 | struct nfsd_net *nn) | |
1da177e4 | 4823 | { |
0836f587 | 4824 | __be32 status; |
38c2f4b1 | 4825 | struct nfs4_stid *s; |
e17f99b7 | 4826 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 4827 | |
8c10cbdb BH |
4828 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
4829 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 4830 | |
1da177e4 | 4831 | *stpp = NULL; |
2dd6e458 | 4832 | status = nfsd4_lookup_stateid(cstate, stateid, typemask, &s, nn); |
c0a5d93e BF |
4833 | if (status) |
4834 | return status; | |
e17f99b7 | 4835 | stp = openlockstateid(s); |
58fb12e6 | 4836 | nfsd4_cstate_assign_replay(cstate, stp->st_stateowner); |
1da177e4 | 4837 | |
e17f99b7 | 4838 | status = nfs4_seqid_op_checks(cstate, stateid, seqid, stp); |
fd911011 | 4839 | if (!status) |
e17f99b7 | 4840 | *stpp = stp; |
fd911011 TM |
4841 | else |
4842 | nfs4_put_stid(&stp->st_stid); | |
e17f99b7 | 4843 | return status; |
c0a5d93e | 4844 | } |
39325bd0 | 4845 | |
3320fef1 SK |
4846 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
4847 | stateid_t *stateid, struct nfs4_ol_stateid **stpp, struct nfsd_net *nn) | |
c0a5d93e BF |
4848 | { |
4849 | __be32 status; | |
4850 | struct nfs4_openowner *oo; | |
4cbfc9f7 | 4851 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4852 | |
c0a5d93e | 4853 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
4cbfc9f7 | 4854 | NFS4_OPEN_STID, &stp, nn); |
7a8711c9 BF |
4855 | if (status) |
4856 | return status; | |
4cbfc9f7 TM |
4857 | oo = openowner(stp->st_stateowner); |
4858 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { | |
4859 | nfs4_put_stid(&stp->st_stid); | |
3a4f98bb | 4860 | return nfserr_bad_stateid; |
4cbfc9f7 TM |
4861 | } |
4862 | *stpp = stp; | |
3a4f98bb | 4863 | return nfs_ok; |
1da177e4 LT |
4864 | } |
4865 | ||
b37ad28b | 4866 | __be32 |
ca364317 | 4867 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4868 | struct nfsd4_open_confirm *oc) |
1da177e4 | 4869 | { |
b37ad28b | 4870 | __be32 status; |
fe0750e5 | 4871 | struct nfs4_openowner *oo; |
dcef0413 | 4872 | struct nfs4_ol_stateid *stp; |
3320fef1 | 4873 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4874 | |
a6a9f18f AV |
4875 | dprintk("NFSD: nfsd4_open_confirm on file %pd\n", |
4876 | cstate->current_fh.fh_dentry); | |
1da177e4 | 4877 | |
ca364317 | 4878 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
4879 | if (status) |
4880 | return status; | |
1da177e4 | 4881 | |
9072d5c6 | 4882 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 4883 | oc->oc_seqid, &oc->oc_req_stateid, |
3320fef1 | 4884 | NFS4_OPEN_STID, &stp, nn); |
9072d5c6 | 4885 | if (status) |
68b66e82 | 4886 | goto out; |
fe0750e5 | 4887 | oo = openowner(stp->st_stateowner); |
68b66e82 | 4888 | status = nfserr_bad_stateid; |
dad1c067 | 4889 | if (oo->oo_flags & NFS4_OO_CONFIRMED) |
2585fc79 | 4890 | goto put_stateid; |
dad1c067 | 4891 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
dcef0413 BF |
4892 | update_stateid(&stp->st_stid.sc_stateid); |
4893 | memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
8c10cbdb | 4894 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
dcef0413 | 4895 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); |
c7b9a459 | 4896 | |
2a4317c5 | 4897 | nfsd4_client_record_create(oo->oo_owner.so_client); |
68b66e82 | 4898 | status = nfs_ok; |
2585fc79 TM |
4899 | put_stateid: |
4900 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 4901 | out: |
9411b1d4 | 4902 | nfsd4_bump_seqid(cstate, status); |
1da177e4 LT |
4903 | return status; |
4904 | } | |
4905 | ||
6409a5a6 | 4906 | static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) |
1da177e4 | 4907 | { |
82c5ff1b | 4908 | if (!test_access(access, stp)) |
6409a5a6 | 4909 | return; |
11b9164a | 4910 | nfs4_file_put_access(stp->st_stid.sc_file, access); |
82c5ff1b | 4911 | clear_access(access, stp); |
6409a5a6 | 4912 | } |
f197c271 | 4913 | |
6409a5a6 BF |
4914 | static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) |
4915 | { | |
4916 | switch (to_access) { | |
4917 | case NFS4_SHARE_ACCESS_READ: | |
4918 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); | |
4919 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
4920 | break; | |
4921 | case NFS4_SHARE_ACCESS_WRITE: | |
4922 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); | |
4923 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
4924 | break; | |
4925 | case NFS4_SHARE_ACCESS_BOTH: | |
4926 | break; | |
4927 | default: | |
063b0fb9 | 4928 | WARN_ON_ONCE(1); |
1da177e4 LT |
4929 | } |
4930 | } | |
4931 | ||
b37ad28b | 4932 | __be32 |
ca364317 BF |
4933 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
4934 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 4935 | struct nfsd4_open_downgrade *od) |
1da177e4 | 4936 | { |
b37ad28b | 4937 | __be32 status; |
dcef0413 | 4938 | struct nfs4_ol_stateid *stp; |
3320fef1 | 4939 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4940 | |
a6a9f18f AV |
4941 | dprintk("NFSD: nfsd4_open_downgrade on file %pd\n", |
4942 | cstate->current_fh.fh_dentry); | |
1da177e4 | 4943 | |
c30e92df | 4944 | /* We don't yet support WANT bits: */ |
2c8bd7e0 BH |
4945 | if (od->od_deleg_want) |
4946 | dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, | |
4947 | od->od_deleg_want); | |
1da177e4 | 4948 | |
c0a5d93e | 4949 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
3320fef1 | 4950 | &od->od_stateid, &stp, nn); |
9072d5c6 | 4951 | if (status) |
1da177e4 | 4952 | goto out; |
1da177e4 | 4953 | status = nfserr_inval; |
82c5ff1b | 4954 | if (!test_access(od->od_share_access, stp)) { |
c11c591f | 4955 | dprintk("NFSD: access not a subset of current bitmap: 0x%hhx, input access=%08x\n", |
1da177e4 | 4956 | stp->st_access_bmap, od->od_share_access); |
0667b1e9 | 4957 | goto put_stateid; |
1da177e4 | 4958 | } |
ce0fc43c | 4959 | if (!test_deny(od->od_share_deny, stp)) { |
c11c591f | 4960 | dprintk("NFSD: deny not a subset of current bitmap: 0x%hhx, input deny=%08x\n", |
1da177e4 | 4961 | stp->st_deny_bmap, od->od_share_deny); |
0667b1e9 | 4962 | goto put_stateid; |
1da177e4 | 4963 | } |
6409a5a6 | 4964 | nfs4_stateid_downgrade(stp, od->od_share_access); |
1da177e4 | 4965 | |
ce0fc43c | 4966 | reset_union_bmap_deny(od->od_share_deny, stp); |
1da177e4 | 4967 | |
dcef0413 BF |
4968 | update_stateid(&stp->st_stid.sc_stateid); |
4969 | memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 4970 | status = nfs_ok; |
0667b1e9 TM |
4971 | put_stateid: |
4972 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 4973 | out: |
9411b1d4 | 4974 | nfsd4_bump_seqid(cstate, status); |
1da177e4 LT |
4975 | return status; |
4976 | } | |
4977 | ||
f7a4d872 BF |
4978 | static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) |
4979 | { | |
acf9295b | 4980 | struct nfs4_client *clp = s->st_stid.sc_client; |
d83017f9 | 4981 | LIST_HEAD(reaplist); |
acf9295b | 4982 | |
f7a4d872 | 4983 | s->st_stid.sc_type = NFS4_CLOSED_STID; |
2c41beb0 | 4984 | spin_lock(&clp->cl_lock); |
d83017f9 | 4985 | unhash_open_stateid(s, &reaplist); |
acf9295b | 4986 | |
d83017f9 JL |
4987 | if (clp->cl_minorversion) { |
4988 | put_ol_stateid_locked(s, &reaplist); | |
4989 | spin_unlock(&clp->cl_lock); | |
4990 | free_ol_stateid_reaplist(&reaplist); | |
4991 | } else { | |
4992 | spin_unlock(&clp->cl_lock); | |
4993 | free_ol_stateid_reaplist(&reaplist); | |
d3134b10 | 4994 | move_to_close_lru(s, clp->net); |
d83017f9 | 4995 | } |
38c387b5 BF |
4996 | } |
4997 | ||
1da177e4 LT |
4998 | /* |
4999 | * nfs4_unlock_state() called after encode | |
5000 | */ | |
b37ad28b | 5001 | __be32 |
ca364317 | 5002 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 5003 | struct nfsd4_close *close) |
1da177e4 | 5004 | { |
b37ad28b | 5005 | __be32 status; |
dcef0413 | 5006 | struct nfs4_ol_stateid *stp; |
3320fef1 SK |
5007 | struct net *net = SVC_NET(rqstp); |
5008 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 | 5009 | |
a6a9f18f AV |
5010 | dprintk("NFSD: nfsd4_close on file %pd\n", |
5011 | cstate->current_fh.fh_dentry); | |
1da177e4 | 5012 | |
f7a4d872 BF |
5013 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
5014 | &close->cl_stateid, | |
5015 | NFS4_OPEN_STID|NFS4_CLOSED_STID, | |
3320fef1 | 5016 | &stp, nn); |
9411b1d4 | 5017 | nfsd4_bump_seqid(cstate, status); |
9072d5c6 | 5018 | if (status) |
1da177e4 | 5019 | goto out; |
dcef0413 BF |
5020 | update_stateid(&stp->st_stid.sc_stateid); |
5021 | memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 5022 | |
f7a4d872 | 5023 | nfsd4_close_open_stateid(stp); |
8a0b589d TM |
5024 | |
5025 | /* put reference from nfs4_preprocess_seqid_op */ | |
5026 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 5027 | out: |
1da177e4 LT |
5028 | return status; |
5029 | } | |
5030 | ||
b37ad28b | 5031 | __be32 |
ca364317 BF |
5032 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
5033 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 5034 | { |
203a8c8e BF |
5035 | struct nfs4_delegation *dp; |
5036 | stateid_t *stateid = &dr->dr_stateid; | |
38c2f4b1 | 5037 | struct nfs4_stid *s; |
b37ad28b | 5038 | __be32 status; |
3320fef1 | 5039 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 5040 | |
ca364317 | 5041 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e | 5042 | return status; |
1da177e4 | 5043 | |
2dd6e458 | 5044 | status = nfsd4_lookup_stateid(cstate, stateid, NFS4_DELEG_STID, &s, nn); |
38c2f4b1 | 5045 | if (status) |
203a8c8e | 5046 | goto out; |
38c2f4b1 | 5047 | dp = delegstateid(s); |
d5477a8d | 5048 | status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); |
203a8c8e | 5049 | if (status) |
fd911011 | 5050 | goto put_stateid; |
203a8c8e | 5051 | |
3bd64a5b | 5052 | destroy_delegation(dp); |
fd911011 TM |
5053 | put_stateid: |
5054 | nfs4_put_stid(&dp->dl_stid); | |
1da177e4 LT |
5055 | out: |
5056 | return status; | |
5057 | } | |
5058 | ||
5059 | ||
1da177e4 | 5060 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) |
1da177e4 | 5061 | |
87df4de8 BH |
5062 | static inline u64 |
5063 | end_offset(u64 start, u64 len) | |
5064 | { | |
5065 | u64 end; | |
5066 | ||
5067 | end = start + len; | |
5068 | return end >= start ? end: NFS4_MAX_UINT64; | |
5069 | } | |
5070 | ||
5071 | /* last octet in a range */ | |
5072 | static inline u64 | |
5073 | last_byte_offset(u64 start, u64 len) | |
5074 | { | |
5075 | u64 end; | |
5076 | ||
063b0fb9 | 5077 | WARN_ON_ONCE(!len); |
87df4de8 BH |
5078 | end = start + len; |
5079 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
5080 | } | |
5081 | ||
1da177e4 LT |
5082 | /* |
5083 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
5084 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
5085 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
5086 | * locking, this prevents us from being completely protocol-compliant. The | |
5087 | * real solution to this problem is to start using unsigned file offsets in | |
5088 | * the VFS, but this is a very deep change! | |
5089 | */ | |
5090 | static inline void | |
5091 | nfs4_transform_lock_offset(struct file_lock *lock) | |
5092 | { | |
5093 | if (lock->fl_start < 0) | |
5094 | lock->fl_start = OFFSET_MAX; | |
5095 | if (lock->fl_end < 0) | |
5096 | lock->fl_end = OFFSET_MAX; | |
5097 | } | |
5098 | ||
cae80b30 JL |
5099 | static fl_owner_t |
5100 | nfsd4_fl_get_owner(fl_owner_t owner) | |
aef9583b | 5101 | { |
cae80b30 JL |
5102 | struct nfs4_lockowner *lo = (struct nfs4_lockowner *)owner; |
5103 | ||
5104 | nfs4_get_stateowner(&lo->lo_owner); | |
5105 | return owner; | |
aef9583b KM |
5106 | } |
5107 | ||
cae80b30 JL |
5108 | static void |
5109 | nfsd4_fl_put_owner(fl_owner_t owner) | |
aef9583b | 5110 | { |
cae80b30 | 5111 | struct nfs4_lockowner *lo = (struct nfs4_lockowner *)owner; |
aef9583b | 5112 | |
cae80b30 | 5113 | if (lo) |
aef9583b | 5114 | nfs4_put_stateowner(&lo->lo_owner); |
aef9583b KM |
5115 | } |
5116 | ||
7b021967 | 5117 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
aef9583b KM |
5118 | .lm_get_owner = nfsd4_fl_get_owner, |
5119 | .lm_put_owner = nfsd4_fl_put_owner, | |
d5b9026a | 5120 | }; |
1da177e4 LT |
5121 | |
5122 | static inline void | |
5123 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
5124 | { | |
fe0750e5 | 5125 | struct nfs4_lockowner *lo; |
1da177e4 | 5126 | |
d5b9026a | 5127 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 BF |
5128 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
5129 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, | |
5130 | lo->lo_owner.so_owner.len, GFP_KERNEL); | |
7c13f344 BF |
5131 | if (!deny->ld_owner.data) |
5132 | /* We just don't care that much */ | |
5133 | goto nevermind; | |
fe0750e5 BF |
5134 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
5135 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; | |
d5b9026a | 5136 | } else { |
7c13f344 BF |
5137 | nevermind: |
5138 | deny->ld_owner.len = 0; | |
5139 | deny->ld_owner.data = NULL; | |
d5b9026a N |
5140 | deny->ld_clientid.cl_boot = 0; |
5141 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
5142 | } |
5143 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
5144 | deny->ld_length = NFS4_MAX_UINT64; |
5145 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
5146 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
5147 | deny->ld_type = NFS4_READ_LT; | |
5148 | if (fl->fl_type != F_RDLCK) | |
5149 | deny->ld_type = NFS4_WRITE_LT; | |
5150 | } | |
5151 | ||
fe0750e5 | 5152 | static struct nfs4_lockowner * |
c58c6610 | 5153 | find_lockowner_str_locked(clientid_t *clid, struct xdr_netobj *owner, |
d4f0489f | 5154 | struct nfs4_client *clp) |
1da177e4 | 5155 | { |
d4f0489f | 5156 | unsigned int strhashval = ownerstr_hashval(owner); |
b3c32bcd | 5157 | struct nfs4_stateowner *so; |
1da177e4 | 5158 | |
0a880a28 TM |
5159 | lockdep_assert_held(&clp->cl_lock); |
5160 | ||
d4f0489f TM |
5161 | list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[strhashval], |
5162 | so_strhash) { | |
b3c32bcd TM |
5163 | if (so->so_is_open_owner) |
5164 | continue; | |
b5971afa KM |
5165 | if (same_owner_str(so, owner)) |
5166 | return lockowner(nfs4_get_stateowner(so)); | |
1da177e4 LT |
5167 | } |
5168 | return NULL; | |
5169 | } | |
5170 | ||
c58c6610 TM |
5171 | static struct nfs4_lockowner * |
5172 | find_lockowner_str(clientid_t *clid, struct xdr_netobj *owner, | |
d4f0489f | 5173 | struct nfs4_client *clp) |
c58c6610 TM |
5174 | { |
5175 | struct nfs4_lockowner *lo; | |
5176 | ||
d4f0489f TM |
5177 | spin_lock(&clp->cl_lock); |
5178 | lo = find_lockowner_str_locked(clid, owner, clp); | |
5179 | spin_unlock(&clp->cl_lock); | |
c58c6610 TM |
5180 | return lo; |
5181 | } | |
5182 | ||
8f4b54c5 JL |
5183 | static void nfs4_unhash_lockowner(struct nfs4_stateowner *sop) |
5184 | { | |
c58c6610 | 5185 | unhash_lockowner_locked(lockowner(sop)); |
8f4b54c5 JL |
5186 | } |
5187 | ||
6b180f0b JL |
5188 | static void nfs4_free_lockowner(struct nfs4_stateowner *sop) |
5189 | { | |
5190 | struct nfs4_lockowner *lo = lockowner(sop); | |
5191 | ||
5192 | kmem_cache_free(lockowner_slab, lo); | |
5193 | } | |
5194 | ||
5195 | static const struct nfs4_stateowner_operations lockowner_ops = { | |
8f4b54c5 JL |
5196 | .so_unhash = nfs4_unhash_lockowner, |
5197 | .so_free = nfs4_free_lockowner, | |
6b180f0b JL |
5198 | }; |
5199 | ||
1da177e4 LT |
5200 | /* |
5201 | * Alloc a lock owner structure. | |
5202 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 5203 | * occurred. |
1da177e4 | 5204 | * |
16bfdaaf | 5205 | * strhashval = ownerstr_hashval |
1da177e4 | 5206 | */ |
fe0750e5 | 5207 | static struct nfs4_lockowner * |
c58c6610 TM |
5208 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, |
5209 | struct nfs4_ol_stateid *open_stp, | |
5210 | struct nfsd4_lock *lock) | |
5211 | { | |
c58c6610 | 5212 | struct nfs4_lockowner *lo, *ret; |
1da177e4 | 5213 | |
fe0750e5 BF |
5214 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
5215 | if (!lo) | |
1da177e4 | 5216 | return NULL; |
fe0750e5 BF |
5217 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
5218 | lo->lo_owner.so_is_open_owner = 0; | |
5db1c03f | 5219 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid; |
6b180f0b | 5220 | lo->lo_owner.so_ops = &lockowner_ops; |
d4f0489f | 5221 | spin_lock(&clp->cl_lock); |
c58c6610 | 5222 | ret = find_lockowner_str_locked(&clp->cl_clientid, |
d4f0489f | 5223 | &lock->lk_new_owner, clp); |
c58c6610 TM |
5224 | if (ret == NULL) { |
5225 | list_add(&lo->lo_owner.so_strhash, | |
d4f0489f | 5226 | &clp->cl_ownerstr_hashtbl[strhashval]); |
c58c6610 TM |
5227 | ret = lo; |
5228 | } else | |
d50ffded KM |
5229 | nfs4_free_stateowner(&lo->lo_owner); |
5230 | ||
d4f0489f | 5231 | spin_unlock(&clp->cl_lock); |
340f0ba1 | 5232 | return ret; |
1da177e4 LT |
5233 | } |
5234 | ||
356a95ec JL |
5235 | static void |
5236 | init_lock_stateid(struct nfs4_ol_stateid *stp, struct nfs4_lockowner *lo, | |
5237 | struct nfs4_file *fp, struct inode *inode, | |
5238 | struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 5239 | { |
d3b313a4 | 5240 | struct nfs4_client *clp = lo->lo_owner.so_client; |
1da177e4 | 5241 | |
356a95ec JL |
5242 | lockdep_assert_held(&clp->cl_lock); |
5243 | ||
3d0fabd5 | 5244 | atomic_inc(&stp->st_stid.sc_count); |
3abdb607 | 5245 | stp->st_stid.sc_type = NFS4_LOCK_STID; |
b5971afa | 5246 | stp->st_stateowner = nfs4_get_stateowner(&lo->lo_owner); |
13cd2184 | 5247 | get_nfs4_file(fp); |
11b9164a | 5248 | stp->st_stid.sc_file = fp; |
b49e084d | 5249 | stp->st_stid.sc_free = nfs4_free_lock_stateid; |
0997b173 | 5250 | stp->st_access_bmap = 0; |
1da177e4 | 5251 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 5252 | stp->st_openstp = open_stp; |
3c87b9b7 | 5253 | list_add(&stp->st_locks, &open_stp->st_locks); |
1c755dc1 | 5254 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
1d31a253 TM |
5255 | spin_lock(&fp->fi_lock); |
5256 | list_add(&stp->st_perfile, &fp->fi_stateids); | |
5257 | spin_unlock(&fp->fi_lock); | |
1da177e4 LT |
5258 | } |
5259 | ||
c53530da JL |
5260 | static struct nfs4_ol_stateid * |
5261 | find_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp) | |
5262 | { | |
5263 | struct nfs4_ol_stateid *lst; | |
356a95ec JL |
5264 | struct nfs4_client *clp = lo->lo_owner.so_client; |
5265 | ||
5266 | lockdep_assert_held(&clp->cl_lock); | |
c53530da JL |
5267 | |
5268 | list_for_each_entry(lst, &lo->lo_owner.so_stateids, st_perstateowner) { | |
3d0fabd5 TM |
5269 | if (lst->st_stid.sc_file == fp) { |
5270 | atomic_inc(&lst->st_stid.sc_count); | |
c53530da | 5271 | return lst; |
3d0fabd5 | 5272 | } |
c53530da JL |
5273 | } |
5274 | return NULL; | |
5275 | } | |
5276 | ||
356a95ec JL |
5277 | static struct nfs4_ol_stateid * |
5278 | find_or_create_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fi, | |
5279 | struct inode *inode, struct nfs4_ol_stateid *ost, | |
5280 | bool *new) | |
5281 | { | |
5282 | struct nfs4_stid *ns = NULL; | |
5283 | struct nfs4_ol_stateid *lst; | |
5284 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); | |
5285 | struct nfs4_client *clp = oo->oo_owner.so_client; | |
5286 | ||
5287 | spin_lock(&clp->cl_lock); | |
5288 | lst = find_lock_stateid(lo, fi); | |
5289 | if (lst == NULL) { | |
5290 | spin_unlock(&clp->cl_lock); | |
5291 | ns = nfs4_alloc_stid(clp, stateid_slab); | |
5292 | if (ns == NULL) | |
5293 | return NULL; | |
5294 | ||
5295 | spin_lock(&clp->cl_lock); | |
5296 | lst = find_lock_stateid(lo, fi); | |
5297 | if (likely(!lst)) { | |
5298 | lst = openlockstateid(ns); | |
5299 | init_lock_stateid(lst, lo, fi, inode, ost); | |
5300 | ns = NULL; | |
5301 | *new = true; | |
5302 | } | |
5303 | } | |
5304 | spin_unlock(&clp->cl_lock); | |
5305 | if (ns) | |
5306 | nfs4_put_stid(ns); | |
5307 | return lst; | |
5308 | } | |
c53530da | 5309 | |
fd39ca9a | 5310 | static int |
1da177e4 LT |
5311 | check_lock_length(u64 offset, u64 length) |
5312 | { | |
87df4de8 | 5313 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
5314 | LOFF_OVERFLOW(offset, length))); |
5315 | } | |
5316 | ||
dcef0413 | 5317 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 | 5318 | { |
11b9164a | 5319 | struct nfs4_file *fp = lock_stp->st_stid.sc_file; |
0997b173 | 5320 | |
7214e860 JL |
5321 | lockdep_assert_held(&fp->fi_lock); |
5322 | ||
82c5ff1b | 5323 | if (test_access(access, lock_stp)) |
0997b173 | 5324 | return; |
12659651 | 5325 | __nfs4_file_get_access(fp, access); |
82c5ff1b | 5326 | set_access(access, lock_stp); |
0997b173 BF |
5327 | } |
5328 | ||
356a95ec JL |
5329 | static __be32 |
5330 | lookup_or_create_lock_state(struct nfsd4_compound_state *cstate, | |
5331 | struct nfs4_ol_stateid *ost, | |
5332 | struct nfsd4_lock *lock, | |
5333 | struct nfs4_ol_stateid **lst, bool *new) | |
64a284d0 | 5334 | { |
5db1c03f | 5335 | __be32 status; |
11b9164a | 5336 | struct nfs4_file *fi = ost->st_stid.sc_file; |
64a284d0 BF |
5337 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); |
5338 | struct nfs4_client *cl = oo->oo_owner.so_client; | |
2b0143b5 | 5339 | struct inode *inode = d_inode(cstate->current_fh.fh_dentry); |
64a284d0 BF |
5340 | struct nfs4_lockowner *lo; |
5341 | unsigned int strhashval; | |
5342 | ||
d4f0489f | 5343 | lo = find_lockowner_str(&cl->cl_clientid, &lock->v.new.owner, cl); |
c53530da | 5344 | if (!lo) { |
d4f0489f | 5345 | strhashval = ownerstr_hashval(&lock->v.new.owner); |
c53530da JL |
5346 | lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); |
5347 | if (lo == NULL) | |
5348 | return nfserr_jukebox; | |
5349 | } else { | |
5350 | /* with an existing lockowner, seqids must be the same */ | |
5db1c03f | 5351 | status = nfserr_bad_seqid; |
c53530da JL |
5352 | if (!cstate->minorversion && |
5353 | lock->lk_new_lock_seqid != lo->lo_owner.so_seqid) | |
5db1c03f | 5354 | goto out; |
64a284d0 | 5355 | } |
c53530da | 5356 | |
356a95ec | 5357 | *lst = find_or_create_lock_stateid(lo, fi, inode, ost, new); |
64a284d0 | 5358 | if (*lst == NULL) { |
5db1c03f JL |
5359 | status = nfserr_jukebox; |
5360 | goto out; | |
64a284d0 | 5361 | } |
5db1c03f JL |
5362 | status = nfs_ok; |
5363 | out: | |
5364 | nfs4_put_stateowner(&lo->lo_owner); | |
5365 | return status; | |
64a284d0 BF |
5366 | } |
5367 | ||
1da177e4 LT |
5368 | /* |
5369 | * LOCK operation | |
5370 | */ | |
b37ad28b | 5371 | __be32 |
ca364317 | 5372 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 5373 | struct nfsd4_lock *lock) |
1da177e4 | 5374 | { |
fe0750e5 BF |
5375 | struct nfs4_openowner *open_sop = NULL; |
5376 | struct nfs4_lockowner *lock_sop = NULL; | |
3d0fabd5 | 5377 | struct nfs4_ol_stateid *lock_stp = NULL; |
0667b1e9 | 5378 | struct nfs4_ol_stateid *open_stp = NULL; |
7214e860 | 5379 | struct nfs4_file *fp; |
7d947842 | 5380 | struct file *filp = NULL; |
21179d81 JL |
5381 | struct file_lock *file_lock = NULL; |
5382 | struct file_lock *conflock = NULL; | |
b37ad28b | 5383 | __be32 status = 0; |
b34f27aa | 5384 | int lkflg; |
b8dd7b9a | 5385 | int err; |
5db1c03f | 5386 | bool new = false; |
3320fef1 SK |
5387 | struct net *net = SVC_NET(rqstp); |
5388 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 LT |
5389 | |
5390 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
5391 | (long long) lock->lk_offset, | |
5392 | (long long) lock->lk_length); | |
5393 | ||
1da177e4 LT |
5394 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
5395 | return nfserr_inval; | |
5396 | ||
ca364317 | 5397 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 5398 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
5399 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
5400 | return status; | |
5401 | } | |
5402 | ||
1da177e4 | 5403 | if (lock->lk_is_new) { |
684e5638 BF |
5404 | if (nfsd4_has_session(cstate)) |
5405 | /* See rfc 5661 18.10.3: given clientid is ignored: */ | |
5406 | memcpy(&lock->v.new.clientid, | |
5407 | &cstate->session->se_client->cl_clientid, | |
5408 | sizeof(clientid_t)); | |
5409 | ||
1da177e4 | 5410 | status = nfserr_stale_clientid; |
2c142baa | 5411 | if (STALE_CLIENTID(&lock->lk_new_clientid, nn)) |
1da177e4 | 5412 | goto out; |
1da177e4 | 5413 | |
1da177e4 | 5414 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 5415 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
5416 | lock->lk_new_open_seqid, |
5417 | &lock->lk_new_open_stateid, | |
3320fef1 | 5418 | &open_stp, nn); |
37515177 | 5419 | if (status) |
1da177e4 | 5420 | goto out; |
fe0750e5 | 5421 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 5422 | status = nfserr_bad_stateid; |
684e5638 | 5423 | if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
b34f27aa BF |
5424 | &lock->v.new.clientid)) |
5425 | goto out; | |
64a284d0 | 5426 | status = lookup_or_create_lock_state(cstate, open_stp, lock, |
5db1c03f | 5427 | &lock_stp, &new); |
3d0fabd5 | 5428 | } else { |
dd453dfd | 5429 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
5430 | lock->lk_old_lock_seqid, |
5431 | &lock->lk_old_lock_stateid, | |
3320fef1 | 5432 | NFS4_LOCK_STID, &lock_stp, nn); |
3d0fabd5 | 5433 | } |
e1aaa891 BF |
5434 | if (status) |
5435 | goto out; | |
64a284d0 | 5436 | lock_sop = lockowner(lock_stp->st_stateowner); |
1da177e4 | 5437 | |
b34f27aa BF |
5438 | lkflg = setlkflg(lock->lk_type); |
5439 | status = nfs4_check_openmode(lock_stp, lkflg); | |
5440 | if (status) | |
5441 | goto out; | |
5442 | ||
0dd395dc | 5443 | status = nfserr_grace; |
3320fef1 | 5444 | if (locks_in_grace(net) && !lock->lk_reclaim) |
0dd395dc N |
5445 | goto out; |
5446 | status = nfserr_no_grace; | |
3320fef1 | 5447 | if (!locks_in_grace(net) && lock->lk_reclaim) |
0dd395dc N |
5448 | goto out; |
5449 | ||
21179d81 JL |
5450 | file_lock = locks_alloc_lock(); |
5451 | if (!file_lock) { | |
5452 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
5453 | status = nfserr_jukebox; | |
5454 | goto out; | |
5455 | } | |
5456 | ||
11b9164a | 5457 | fp = lock_stp->st_stid.sc_file; |
1da177e4 LT |
5458 | switch (lock->lk_type) { |
5459 | case NFS4_READ_LT: | |
5460 | case NFS4_READW_LT: | |
7214e860 JL |
5461 | spin_lock(&fp->fi_lock); |
5462 | filp = find_readable_file_locked(fp); | |
0997b173 BF |
5463 | if (filp) |
5464 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
7214e860 | 5465 | spin_unlock(&fp->fi_lock); |
21179d81 | 5466 | file_lock->fl_type = F_RDLCK; |
529d7b2a | 5467 | break; |
1da177e4 LT |
5468 | case NFS4_WRITE_LT: |
5469 | case NFS4_WRITEW_LT: | |
7214e860 JL |
5470 | spin_lock(&fp->fi_lock); |
5471 | filp = find_writeable_file_locked(fp); | |
0997b173 BF |
5472 | if (filp) |
5473 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
7214e860 | 5474 | spin_unlock(&fp->fi_lock); |
21179d81 | 5475 | file_lock->fl_type = F_WRLCK; |
529d7b2a | 5476 | break; |
1da177e4 LT |
5477 | default: |
5478 | status = nfserr_inval; | |
5479 | goto out; | |
5480 | } | |
f9d7562f BF |
5481 | if (!filp) { |
5482 | status = nfserr_openmode; | |
5483 | goto out; | |
5484 | } | |
aef9583b KM |
5485 | |
5486 | file_lock->fl_owner = (fl_owner_t)lockowner(nfs4_get_stateowner(&lock_sop->lo_owner)); | |
21179d81 JL |
5487 | file_lock->fl_pid = current->tgid; |
5488 | file_lock->fl_file = filp; | |
5489 | file_lock->fl_flags = FL_POSIX; | |
5490 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
5491 | file_lock->fl_start = lock->lk_offset; | |
5492 | file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); | |
5493 | nfs4_transform_lock_offset(file_lock); | |
5494 | ||
5495 | conflock = locks_alloc_lock(); | |
5496 | if (!conflock) { | |
5497 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
5498 | status = nfserr_jukebox; | |
5499 | goto out; | |
5500 | } | |
1da177e4 | 5501 | |
21179d81 | 5502 | err = vfs_lock_file(filp, F_SETLK, file_lock, conflock); |
b8dd7b9a | 5503 | switch (-err) { |
1da177e4 | 5504 | case 0: /* success! */ |
dcef0413 BF |
5505 | update_stateid(&lock_stp->st_stid.sc_stateid); |
5506 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, | |
1da177e4 | 5507 | sizeof(stateid_t)); |
b8dd7b9a | 5508 | status = 0; |
eb76b3fd AA |
5509 | break; |
5510 | case (EAGAIN): /* conflock holds conflicting lock */ | |
5511 | status = nfserr_denied; | |
5512 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
21179d81 | 5513 | nfs4_set_lock_denied(conflock, &lock->lk_denied); |
eb76b3fd | 5514 | break; |
1da177e4 LT |
5515 | case (EDEADLK): |
5516 | status = nfserr_deadlock; | |
eb76b3fd | 5517 | break; |
3e772463 | 5518 | default: |
fd85b817 | 5519 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 5520 | status = nfserrno(err); |
eb76b3fd | 5521 | break; |
1da177e4 | 5522 | } |
1da177e4 | 5523 | out: |
de18643d TM |
5524 | if (filp) |
5525 | fput(filp); | |
5db1c03f JL |
5526 | if (lock_stp) { |
5527 | /* Bump seqid manually if the 4.0 replay owner is openowner */ | |
5528 | if (cstate->replay_owner && | |
5529 | cstate->replay_owner != &lock_sop->lo_owner && | |
5530 | seqid_mutating_err(ntohl(status))) | |
5531 | lock_sop->lo_owner.so_seqid++; | |
5532 | ||
5533 | /* | |
5534 | * If this is a new, never-before-used stateid, and we are | |
5535 | * returning an error, then just go ahead and release it. | |
5536 | */ | |
5537 | if (status && new) | |
5538 | release_lock_stateid(lock_stp); | |
5539 | ||
3d0fabd5 | 5540 | nfs4_put_stid(&lock_stp->st_stid); |
5db1c03f | 5541 | } |
0667b1e9 TM |
5542 | if (open_stp) |
5543 | nfs4_put_stid(&open_stp->st_stid); | |
9411b1d4 | 5544 | nfsd4_bump_seqid(cstate, status); |
21179d81 JL |
5545 | if (file_lock) |
5546 | locks_free_lock(file_lock); | |
5547 | if (conflock) | |
5548 | locks_free_lock(conflock); | |
1da177e4 LT |
5549 | return status; |
5550 | } | |
5551 | ||
55ef1274 BF |
5552 | /* |
5553 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
5554 | * so we do a temporary open here just to get an open file to pass to | |
5555 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
5556 | * inode operation.) | |
5557 | */ | |
04da6e9d | 5558 | static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) |
55ef1274 BF |
5559 | { |
5560 | struct file *file; | |
04da6e9d AV |
5561 | __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); |
5562 | if (!err) { | |
5563 | err = nfserrno(vfs_test_lock(file, lock)); | |
fd891454 | 5564 | fput(file); |
04da6e9d | 5565 | } |
55ef1274 BF |
5566 | return err; |
5567 | } | |
5568 | ||
1da177e4 LT |
5569 | /* |
5570 | * LOCKT operation | |
5571 | */ | |
b37ad28b | 5572 | __be32 |
ca364317 BF |
5573 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
5574 | struct nfsd4_lockt *lockt) | |
1da177e4 | 5575 | { |
21179d81 | 5576 | struct file_lock *file_lock = NULL; |
5db1c03f | 5577 | struct nfs4_lockowner *lo = NULL; |
b37ad28b | 5578 | __be32 status; |
7f2210fa | 5579 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 5580 | |
5ccb0066 | 5581 | if (locks_in_grace(SVC_NET(rqstp))) |
1da177e4 LT |
5582 | return nfserr_grace; |
5583 | ||
5584 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
5585 | return nfserr_inval; | |
5586 | ||
9b2ef62b | 5587 | if (!nfsd4_has_session(cstate)) { |
4b24ca7d | 5588 | status = lookup_clientid(&lockt->lt_clientid, cstate, nn); |
9b2ef62b BF |
5589 | if (status) |
5590 | goto out; | |
5591 | } | |
1da177e4 | 5592 | |
75c096f7 | 5593 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 5594 | goto out; |
1da177e4 | 5595 | |
21179d81 JL |
5596 | file_lock = locks_alloc_lock(); |
5597 | if (!file_lock) { | |
5598 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
5599 | status = nfserr_jukebox; | |
5600 | goto out; | |
5601 | } | |
6cd90662 | 5602 | |
1da177e4 LT |
5603 | switch (lockt->lt_type) { |
5604 | case NFS4_READ_LT: | |
5605 | case NFS4_READW_LT: | |
21179d81 | 5606 | file_lock->fl_type = F_RDLCK; |
1da177e4 LT |
5607 | break; |
5608 | case NFS4_WRITE_LT: | |
5609 | case NFS4_WRITEW_LT: | |
21179d81 | 5610 | file_lock->fl_type = F_WRLCK; |
1da177e4 LT |
5611 | break; |
5612 | default: | |
2fdada03 | 5613 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
5614 | status = nfserr_inval; |
5615 | goto out; | |
5616 | } | |
5617 | ||
d4f0489f TM |
5618 | lo = find_lockowner_str(&lockt->lt_clientid, &lockt->lt_owner, |
5619 | cstate->clp); | |
fe0750e5 | 5620 | if (lo) |
21179d81 JL |
5621 | file_lock->fl_owner = (fl_owner_t)lo; |
5622 | file_lock->fl_pid = current->tgid; | |
5623 | file_lock->fl_flags = FL_POSIX; | |
1da177e4 | 5624 | |
21179d81 JL |
5625 | file_lock->fl_start = lockt->lt_offset; |
5626 | file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); | |
1da177e4 | 5627 | |
21179d81 | 5628 | nfs4_transform_lock_offset(file_lock); |
1da177e4 | 5629 | |
21179d81 | 5630 | status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock); |
04da6e9d | 5631 | if (status) |
fd85b817 | 5632 | goto out; |
04da6e9d | 5633 | |
21179d81 | 5634 | if (file_lock->fl_type != F_UNLCK) { |
1da177e4 | 5635 | status = nfserr_denied; |
21179d81 | 5636 | nfs4_set_lock_denied(file_lock, &lockt->lt_denied); |
1da177e4 LT |
5637 | } |
5638 | out: | |
5db1c03f JL |
5639 | if (lo) |
5640 | nfs4_put_stateowner(&lo->lo_owner); | |
21179d81 JL |
5641 | if (file_lock) |
5642 | locks_free_lock(file_lock); | |
1da177e4 LT |
5643 | return status; |
5644 | } | |
5645 | ||
b37ad28b | 5646 | __be32 |
ca364317 | 5647 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 5648 | struct nfsd4_locku *locku) |
1da177e4 | 5649 | { |
dcef0413 | 5650 | struct nfs4_ol_stateid *stp; |
1da177e4 | 5651 | struct file *filp = NULL; |
21179d81 | 5652 | struct file_lock *file_lock = NULL; |
b37ad28b | 5653 | __be32 status; |
b8dd7b9a | 5654 | int err; |
3320fef1 SK |
5655 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
5656 | ||
1da177e4 LT |
5657 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", |
5658 | (long long) locku->lu_offset, | |
5659 | (long long) locku->lu_length); | |
5660 | ||
5661 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
5662 | return nfserr_inval; | |
5663 | ||
9072d5c6 | 5664 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
3320fef1 SK |
5665 | &locku->lu_stateid, NFS4_LOCK_STID, |
5666 | &stp, nn); | |
9072d5c6 | 5667 | if (status) |
1da177e4 | 5668 | goto out; |
11b9164a | 5669 | filp = find_any_file(stp->st_stid.sc_file); |
f9d7562f BF |
5670 | if (!filp) { |
5671 | status = nfserr_lock_range; | |
858cc573 | 5672 | goto put_stateid; |
f9d7562f | 5673 | } |
21179d81 JL |
5674 | file_lock = locks_alloc_lock(); |
5675 | if (!file_lock) { | |
5676 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
5677 | status = nfserr_jukebox; | |
de18643d | 5678 | goto fput; |
21179d81 | 5679 | } |
6cd90662 | 5680 | |
21179d81 | 5681 | file_lock->fl_type = F_UNLCK; |
aef9583b | 5682 | file_lock->fl_owner = (fl_owner_t)lockowner(nfs4_get_stateowner(stp->st_stateowner)); |
21179d81 JL |
5683 | file_lock->fl_pid = current->tgid; |
5684 | file_lock->fl_file = filp; | |
5685 | file_lock->fl_flags = FL_POSIX; | |
5686 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
5687 | file_lock->fl_start = locku->lu_offset; | |
5688 | ||
5689 | file_lock->fl_end = last_byte_offset(locku->lu_offset, | |
5690 | locku->lu_length); | |
5691 | nfs4_transform_lock_offset(file_lock); | |
1da177e4 | 5692 | |
21179d81 | 5693 | err = vfs_lock_file(filp, F_SETLK, file_lock, NULL); |
b8dd7b9a | 5694 | if (err) { |
fd85b817 | 5695 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
5696 | goto out_nfserr; |
5697 | } | |
dcef0413 BF |
5698 | update_stateid(&stp->st_stid.sc_stateid); |
5699 | memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
de18643d TM |
5700 | fput: |
5701 | fput(filp); | |
858cc573 TM |
5702 | put_stateid: |
5703 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 5704 | out: |
9411b1d4 | 5705 | nfsd4_bump_seqid(cstate, status); |
21179d81 JL |
5706 | if (file_lock) |
5707 | locks_free_lock(file_lock); | |
1da177e4 LT |
5708 | return status; |
5709 | ||
5710 | out_nfserr: | |
b8dd7b9a | 5711 | status = nfserrno(err); |
de18643d | 5712 | goto fput; |
1da177e4 LT |
5713 | } |
5714 | ||
5715 | /* | |
5716 | * returns | |
f9c00c3a JL |
5717 | * true: locks held by lockowner |
5718 | * false: no locks held by lockowner | |
1da177e4 | 5719 | */ |
f9c00c3a JL |
5720 | static bool |
5721 | check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner) | |
1da177e4 | 5722 | { |
bd61e0a9 | 5723 | struct file_lock *fl; |
f9c00c3a JL |
5724 | int status = false; |
5725 | struct file *filp = find_any_file(fp); | |
5726 | struct inode *inode; | |
bd61e0a9 | 5727 | struct file_lock_context *flctx; |
f9c00c3a JL |
5728 | |
5729 | if (!filp) { | |
5730 | /* Any valid lock stateid should have some sort of access */ | |
5731 | WARN_ON_ONCE(1); | |
5732 | return status; | |
5733 | } | |
5734 | ||
5735 | inode = file_inode(filp); | |
bd61e0a9 JL |
5736 | flctx = inode->i_flctx; |
5737 | ||
5738 | if (flctx && !list_empty_careful(&flctx->flc_posix)) { | |
6109c850 | 5739 | spin_lock(&flctx->flc_lock); |
bd61e0a9 JL |
5740 | list_for_each_entry(fl, &flctx->flc_posix, fl_list) { |
5741 | if (fl->fl_owner == (fl_owner_t)lowner) { | |
5742 | status = true; | |
5743 | break; | |
5744 | } | |
796dadfd | 5745 | } |
6109c850 | 5746 | spin_unlock(&flctx->flc_lock); |
1da177e4 | 5747 | } |
f9c00c3a | 5748 | fput(filp); |
1da177e4 LT |
5749 | return status; |
5750 | } | |
5751 | ||
b37ad28b | 5752 | __be32 |
b591480b BF |
5753 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
5754 | struct nfsd4_compound_state *cstate, | |
5755 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
5756 | { |
5757 | clientid_t *clid = &rlockowner->rl_clientid; | |
882e9d25 JL |
5758 | struct nfs4_stateowner *sop; |
5759 | struct nfs4_lockowner *lo = NULL; | |
dcef0413 | 5760 | struct nfs4_ol_stateid *stp; |
1da177e4 | 5761 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
d4f0489f | 5762 | unsigned int hashval = ownerstr_hashval(owner); |
b37ad28b | 5763 | __be32 status; |
7f2210fa | 5764 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
c58c6610 | 5765 | struct nfs4_client *clp; |
1da177e4 LT |
5766 | |
5767 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
5768 | clid->cl_boot, clid->cl_id); | |
5769 | ||
4b24ca7d | 5770 | status = lookup_clientid(clid, cstate, nn); |
9b2ef62b | 5771 | if (status) |
51f5e783 | 5772 | return status; |
9b2ef62b | 5773 | |
d4f0489f | 5774 | clp = cstate->clp; |
fd44907c | 5775 | /* Find the matching lock stateowner */ |
d4f0489f | 5776 | spin_lock(&clp->cl_lock); |
882e9d25 | 5777 | list_for_each_entry(sop, &clp->cl_ownerstr_hashtbl[hashval], |
d4f0489f | 5778 | so_strhash) { |
fd44907c | 5779 | |
882e9d25 JL |
5780 | if (sop->so_is_open_owner || !same_owner_str(sop, owner)) |
5781 | continue; | |
fd44907c | 5782 | |
882e9d25 JL |
5783 | /* see if there are still any locks associated with it */ |
5784 | lo = lockowner(sop); | |
5785 | list_for_each_entry(stp, &sop->so_stateids, st_perstateowner) { | |
5786 | if (check_for_locks(stp->st_stid.sc_file, lo)) { | |
5787 | status = nfserr_locks_held; | |
5788 | spin_unlock(&clp->cl_lock); | |
51f5e783 | 5789 | return status; |
882e9d25 | 5790 | } |
5adfd885 | 5791 | } |
882e9d25 | 5792 | |
b5971afa | 5793 | nfs4_get_stateowner(sop); |
882e9d25 | 5794 | break; |
1da177e4 | 5795 | } |
c58c6610 | 5796 | spin_unlock(&clp->cl_lock); |
882e9d25 JL |
5797 | if (lo) |
5798 | release_lockowner(lo); | |
1da177e4 LT |
5799 | return status; |
5800 | } | |
5801 | ||
5802 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 5803 | alloc_reclaim(void) |
1da177e4 | 5804 | { |
a55370a3 | 5805 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
5806 | } |
5807 | ||
0ce0c2b5 | 5808 | bool |
52e19c09 | 5809 | nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn) |
c7b9a459 | 5810 | { |
0ce0c2b5 | 5811 | struct nfs4_client_reclaim *crp; |
c7b9a459 | 5812 | |
52e19c09 | 5813 | crp = nfsd4_find_reclaim_client(name, nn); |
0ce0c2b5 | 5814 | return (crp && crp->cr_clp); |
c7b9a459 N |
5815 | } |
5816 | ||
1da177e4 LT |
5817 | /* |
5818 | * failure => all reset bets are off, nfserr_no_grace... | |
5819 | */ | |
772a9bbb | 5820 | struct nfs4_client_reclaim * |
52e19c09 | 5821 | nfs4_client_to_reclaim(const char *name, struct nfsd_net *nn) |
1da177e4 LT |
5822 | { |
5823 | unsigned int strhashval; | |
772a9bbb | 5824 | struct nfs4_client_reclaim *crp; |
1da177e4 | 5825 | |
a55370a3 N |
5826 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
5827 | crp = alloc_reclaim(); | |
772a9bbb JL |
5828 | if (crp) { |
5829 | strhashval = clientstr_hashval(name); | |
5830 | INIT_LIST_HEAD(&crp->cr_strhash); | |
52e19c09 | 5831 | list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]); |
772a9bbb | 5832 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
0ce0c2b5 | 5833 | crp->cr_clp = NULL; |
52e19c09 | 5834 | nn->reclaim_str_hashtbl_size++; |
772a9bbb JL |
5835 | } |
5836 | return crp; | |
1da177e4 LT |
5837 | } |
5838 | ||
ce30e539 | 5839 | void |
52e19c09 | 5840 | nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn) |
ce30e539 JL |
5841 | { |
5842 | list_del(&crp->cr_strhash); | |
5843 | kfree(crp); | |
52e19c09 | 5844 | nn->reclaim_str_hashtbl_size--; |
ce30e539 JL |
5845 | } |
5846 | ||
2a4317c5 | 5847 | void |
52e19c09 | 5848 | nfs4_release_reclaim(struct nfsd_net *nn) |
1da177e4 LT |
5849 | { |
5850 | struct nfs4_client_reclaim *crp = NULL; | |
5851 | int i; | |
5852 | ||
1da177e4 | 5853 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
52e19c09 SK |
5854 | while (!list_empty(&nn->reclaim_str_hashtbl[i])) { |
5855 | crp = list_entry(nn->reclaim_str_hashtbl[i].next, | |
1da177e4 | 5856 | struct nfs4_client_reclaim, cr_strhash); |
52e19c09 | 5857 | nfs4_remove_reclaim_record(crp, nn); |
1da177e4 LT |
5858 | } |
5859 | } | |
063b0fb9 | 5860 | WARN_ON_ONCE(nn->reclaim_str_hashtbl_size); |
1da177e4 LT |
5861 | } |
5862 | ||
5863 | /* | |
5864 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
2a4317c5 | 5865 | struct nfs4_client_reclaim * |
52e19c09 | 5866 | nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn) |
1da177e4 LT |
5867 | { |
5868 | unsigned int strhashval; | |
1da177e4 LT |
5869 | struct nfs4_client_reclaim *crp = NULL; |
5870 | ||
278c931c | 5871 | dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir); |
1da177e4 | 5872 | |
278c931c | 5873 | strhashval = clientstr_hashval(recdir); |
52e19c09 | 5874 | list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) { |
278c931c | 5875 | if (same_name(crp->cr_recdir, recdir)) { |
1da177e4 LT |
5876 | return crp; |
5877 | } | |
5878 | } | |
5879 | return NULL; | |
5880 | } | |
5881 | ||
5882 | /* | |
5883 | * Called from OPEN. Look for clientid in reclaim list. | |
5884 | */ | |
b37ad28b | 5885 | __be32 |
0fe492db TM |
5886 | nfs4_check_open_reclaim(clientid_t *clid, |
5887 | struct nfsd4_compound_state *cstate, | |
5888 | struct nfsd_net *nn) | |
1da177e4 | 5889 | { |
0fe492db | 5890 | __be32 status; |
a52d726b JL |
5891 | |
5892 | /* find clientid in conf_id_hashtbl */ | |
0fe492db TM |
5893 | status = lookup_clientid(clid, cstate, nn); |
5894 | if (status) | |
a52d726b JL |
5895 | return nfserr_reclaim_bad; |
5896 | ||
3b3e7b72 JL |
5897 | if (test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, &cstate->clp->cl_flags)) |
5898 | return nfserr_no_grace; | |
5899 | ||
0fe492db TM |
5900 | if (nfsd4_client_record_check(cstate->clp)) |
5901 | return nfserr_reclaim_bad; | |
5902 | ||
5903 | return nfs_ok; | |
1da177e4 LT |
5904 | } |
5905 | ||
65178db4 | 5906 | #ifdef CONFIG_NFSD_FAULT_INJECTION |
016200c3 JL |
5907 | static inline void |
5908 | put_client(struct nfs4_client *clp) | |
5909 | { | |
5910 | atomic_dec(&clp->cl_refcount); | |
5911 | } | |
5912 | ||
285abdee JL |
5913 | static struct nfs4_client * |
5914 | nfsd_find_client(struct sockaddr_storage *addr, size_t addr_size) | |
5915 | { | |
5916 | struct nfs4_client *clp; | |
5917 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
5918 | nfsd_net_id); | |
5919 | ||
5920 | if (!nfsd_netns_ready(nn)) | |
5921 | return NULL; | |
5922 | ||
5923 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
5924 | if (memcmp(&clp->cl_addr, addr, addr_size) == 0) | |
5925 | return clp; | |
5926 | } | |
5927 | return NULL; | |
5928 | } | |
5929 | ||
7ec0e36f | 5930 | u64 |
285abdee | 5931 | nfsd_inject_print_clients(void) |
7ec0e36f JL |
5932 | { |
5933 | struct nfs4_client *clp; | |
5934 | u64 count = 0; | |
5935 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
5936 | nfsd_net_id); | |
5937 | char buf[INET6_ADDRSTRLEN]; | |
5938 | ||
5939 | if (!nfsd_netns_ready(nn)) | |
5940 | return 0; | |
5941 | ||
5942 | spin_lock(&nn->client_lock); | |
5943 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
5944 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); | |
5945 | pr_info("NFS Client: %s\n", buf); | |
5946 | ++count; | |
5947 | } | |
5948 | spin_unlock(&nn->client_lock); | |
5949 | ||
5950 | return count; | |
5951 | } | |
65178db4 | 5952 | |
a0926d15 | 5953 | u64 |
285abdee | 5954 | nfsd_inject_forget_client(struct sockaddr_storage *addr, size_t addr_size) |
a0926d15 JL |
5955 | { |
5956 | u64 count = 0; | |
5957 | struct nfs4_client *clp; | |
5958 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
5959 | nfsd_net_id); | |
5960 | ||
5961 | if (!nfsd_netns_ready(nn)) | |
5962 | return count; | |
5963 | ||
5964 | spin_lock(&nn->client_lock); | |
5965 | clp = nfsd_find_client(addr, addr_size); | |
5966 | if (clp) { | |
5967 | if (mark_client_expired_locked(clp) == nfs_ok) | |
5968 | ++count; | |
5969 | else | |
5970 | clp = NULL; | |
5971 | } | |
5972 | spin_unlock(&nn->client_lock); | |
5973 | ||
5974 | if (clp) | |
5975 | expire_client(clp); | |
5976 | ||
5977 | return count; | |
5978 | } | |
5979 | ||
69fc9edf | 5980 | u64 |
285abdee | 5981 | nfsd_inject_forget_clients(u64 max) |
69fc9edf JL |
5982 | { |
5983 | u64 count = 0; | |
5984 | struct nfs4_client *clp, *next; | |
5985 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
5986 | nfsd_net_id); | |
5987 | LIST_HEAD(reaplist); | |
5988 | ||
5989 | if (!nfsd_netns_ready(nn)) | |
5990 | return count; | |
5991 | ||
5992 | spin_lock(&nn->client_lock); | |
5993 | list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { | |
5994 | if (mark_client_expired_locked(clp) == nfs_ok) { | |
5995 | list_add(&clp->cl_lru, &reaplist); | |
5996 | if (max != 0 && ++count >= max) | |
5997 | break; | |
5998 | } | |
5999 | } | |
6000 | spin_unlock(&nn->client_lock); | |
6001 | ||
6002 | list_for_each_entry_safe(clp, next, &reaplist, cl_lru) | |
6003 | expire_client(clp); | |
6004 | ||
6005 | return count; | |
6006 | } | |
6007 | ||
184c1847 BS |
6008 | static void nfsd_print_count(struct nfs4_client *clp, unsigned int count, |
6009 | const char *type) | |
6010 | { | |
6011 | char buf[INET6_ADDRSTRLEN]; | |
0a5c33e2 | 6012 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
184c1847 BS |
6013 | printk(KERN_INFO "NFS Client: %s has %u %s\n", buf, count, type); |
6014 | } | |
6015 | ||
016200c3 JL |
6016 | static void |
6017 | nfsd_inject_add_lock_to_list(struct nfs4_ol_stateid *lst, | |
6018 | struct list_head *collect) | |
6019 | { | |
6020 | struct nfs4_client *clp = lst->st_stid.sc_client; | |
6021 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6022 | nfsd_net_id); | |
6023 | ||
6024 | if (!collect) | |
6025 | return; | |
6026 | ||
6027 | lockdep_assert_held(&nn->client_lock); | |
6028 | atomic_inc(&clp->cl_refcount); | |
6029 | list_add(&lst->st_locks, collect); | |
6030 | } | |
6031 | ||
3c87b9b7 | 6032 | static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max, |
3738d50e | 6033 | struct list_head *collect, |
3c87b9b7 | 6034 | void (*func)(struct nfs4_ol_stateid *)) |
fc29171f BS |
6035 | { |
6036 | struct nfs4_openowner *oop; | |
fc29171f | 6037 | struct nfs4_ol_stateid *stp, *st_next; |
3c87b9b7 | 6038 | struct nfs4_ol_stateid *lst, *lst_next; |
fc29171f BS |
6039 | u64 count = 0; |
6040 | ||
016200c3 | 6041 | spin_lock(&clp->cl_lock); |
fc29171f | 6042 | list_for_each_entry(oop, &clp->cl_openowners, oo_perclient) { |
3c87b9b7 TM |
6043 | list_for_each_entry_safe(stp, st_next, |
6044 | &oop->oo_owner.so_stateids, st_perstateowner) { | |
6045 | list_for_each_entry_safe(lst, lst_next, | |
6046 | &stp->st_locks, st_locks) { | |
3738d50e | 6047 | if (func) { |
3c87b9b7 | 6048 | func(lst); |
016200c3 JL |
6049 | nfsd_inject_add_lock_to_list(lst, |
6050 | collect); | |
3738d50e | 6051 | } |
016200c3 JL |
6052 | ++count; |
6053 | /* | |
6054 | * Despite the fact that these functions deal | |
6055 | * with 64-bit integers for "count", we must | |
6056 | * ensure that it doesn't blow up the | |
6057 | * clp->cl_refcount. Throw a warning if we | |
6058 | * start to approach INT_MAX here. | |
6059 | */ | |
6060 | WARN_ON_ONCE(count == (INT_MAX / 2)); | |
6061 | if (count == max) | |
6062 | goto out; | |
fc29171f BS |
6063 | } |
6064 | } | |
6065 | } | |
016200c3 JL |
6066 | out: |
6067 | spin_unlock(&clp->cl_lock); | |
fc29171f BS |
6068 | |
6069 | return count; | |
6070 | } | |
6071 | ||
016200c3 JL |
6072 | static u64 |
6073 | nfsd_collect_client_locks(struct nfs4_client *clp, struct list_head *collect, | |
6074 | u64 max) | |
fc29171f | 6075 | { |
016200c3 | 6076 | return nfsd_foreach_client_lock(clp, max, collect, unhash_lock_stateid); |
fc29171f BS |
6077 | } |
6078 | ||
016200c3 JL |
6079 | static u64 |
6080 | nfsd_print_client_locks(struct nfs4_client *clp) | |
184c1847 | 6081 | { |
016200c3 | 6082 | u64 count = nfsd_foreach_client_lock(clp, 0, NULL, NULL); |
184c1847 BS |
6083 | nfsd_print_count(clp, count, "locked files"); |
6084 | return count; | |
6085 | } | |
6086 | ||
016200c3 | 6087 | u64 |
285abdee | 6088 | nfsd_inject_print_locks(void) |
016200c3 JL |
6089 | { |
6090 | struct nfs4_client *clp; | |
6091 | u64 count = 0; | |
6092 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6093 | nfsd_net_id); | |
6094 | ||
6095 | if (!nfsd_netns_ready(nn)) | |
6096 | return 0; | |
6097 | ||
6098 | spin_lock(&nn->client_lock); | |
6099 | list_for_each_entry(clp, &nn->client_lru, cl_lru) | |
6100 | count += nfsd_print_client_locks(clp); | |
6101 | spin_unlock(&nn->client_lock); | |
6102 | ||
6103 | return count; | |
6104 | } | |
6105 | ||
6106 | static void | |
6107 | nfsd_reap_locks(struct list_head *reaplist) | |
6108 | { | |
6109 | struct nfs4_client *clp; | |
6110 | struct nfs4_ol_stateid *stp, *next; | |
6111 | ||
6112 | list_for_each_entry_safe(stp, next, reaplist, st_locks) { | |
6113 | list_del_init(&stp->st_locks); | |
6114 | clp = stp->st_stid.sc_client; | |
6115 | nfs4_put_stid(&stp->st_stid); | |
6116 | put_client(clp); | |
6117 | } | |
6118 | } | |
6119 | ||
6120 | u64 | |
285abdee | 6121 | nfsd_inject_forget_client_locks(struct sockaddr_storage *addr, size_t addr_size) |
016200c3 JL |
6122 | { |
6123 | unsigned int count = 0; | |
6124 | struct nfs4_client *clp; | |
6125 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6126 | nfsd_net_id); | |
6127 | LIST_HEAD(reaplist); | |
6128 | ||
6129 | if (!nfsd_netns_ready(nn)) | |
6130 | return count; | |
6131 | ||
6132 | spin_lock(&nn->client_lock); | |
6133 | clp = nfsd_find_client(addr, addr_size); | |
6134 | if (clp) | |
6135 | count = nfsd_collect_client_locks(clp, &reaplist, 0); | |
6136 | spin_unlock(&nn->client_lock); | |
6137 | nfsd_reap_locks(&reaplist); | |
6138 | return count; | |
6139 | } | |
6140 | ||
6141 | u64 | |
285abdee | 6142 | nfsd_inject_forget_locks(u64 max) |
016200c3 JL |
6143 | { |
6144 | u64 count = 0; | |
6145 | struct nfs4_client *clp; | |
6146 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6147 | nfsd_net_id); | |
6148 | LIST_HEAD(reaplist); | |
6149 | ||
6150 | if (!nfsd_netns_ready(nn)) | |
6151 | return count; | |
6152 | ||
6153 | spin_lock(&nn->client_lock); | |
6154 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
6155 | count += nfsd_collect_client_locks(clp, &reaplist, max - count); | |
6156 | if (max != 0 && count >= max) | |
6157 | break; | |
6158 | } | |
6159 | spin_unlock(&nn->client_lock); | |
6160 | nfsd_reap_locks(&reaplist); | |
6161 | return count; | |
6162 | } | |
6163 | ||
82e05efa JL |
6164 | static u64 |
6165 | nfsd_foreach_client_openowner(struct nfs4_client *clp, u64 max, | |
6166 | struct list_head *collect, | |
6167 | void (*func)(struct nfs4_openowner *)) | |
4dbdbda8 BS |
6168 | { |
6169 | struct nfs4_openowner *oop, *next; | |
82e05efa JL |
6170 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, |
6171 | nfsd_net_id); | |
4dbdbda8 BS |
6172 | u64 count = 0; |
6173 | ||
82e05efa JL |
6174 | lockdep_assert_held(&nn->client_lock); |
6175 | ||
6176 | spin_lock(&clp->cl_lock); | |
4dbdbda8 | 6177 | list_for_each_entry_safe(oop, next, &clp->cl_openowners, oo_perclient) { |
82e05efa | 6178 | if (func) { |
4dbdbda8 | 6179 | func(oop); |
82e05efa JL |
6180 | if (collect) { |
6181 | atomic_inc(&clp->cl_refcount); | |
6182 | list_add(&oop->oo_perclient, collect); | |
6183 | } | |
6184 | } | |
6185 | ++count; | |
6186 | /* | |
6187 | * Despite the fact that these functions deal with | |
6188 | * 64-bit integers for "count", we must ensure that | |
6189 | * it doesn't blow up the clp->cl_refcount. Throw a | |
6190 | * warning if we start to approach INT_MAX here. | |
6191 | */ | |
6192 | WARN_ON_ONCE(count == (INT_MAX / 2)); | |
6193 | if (count == max) | |
4dbdbda8 BS |
6194 | break; |
6195 | } | |
82e05efa JL |
6196 | spin_unlock(&clp->cl_lock); |
6197 | ||
6198 | return count; | |
6199 | } | |
6200 | ||
6201 | static u64 | |
6202 | nfsd_print_client_openowners(struct nfs4_client *clp) | |
6203 | { | |
6204 | u64 count = nfsd_foreach_client_openowner(clp, 0, NULL, NULL); | |
6205 | ||
6206 | nfsd_print_count(clp, count, "openowners"); | |
6207 | return count; | |
6208 | } | |
6209 | ||
6210 | static u64 | |
6211 | nfsd_collect_client_openowners(struct nfs4_client *clp, | |
6212 | struct list_head *collect, u64 max) | |
6213 | { | |
6214 | return nfsd_foreach_client_openowner(clp, max, collect, | |
6215 | unhash_openowner_locked); | |
6216 | } | |
6217 | ||
6218 | u64 | |
285abdee | 6219 | nfsd_inject_print_openowners(void) |
82e05efa JL |
6220 | { |
6221 | struct nfs4_client *clp; | |
6222 | u64 count = 0; | |
6223 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6224 | nfsd_net_id); | |
6225 | ||
6226 | if (!nfsd_netns_ready(nn)) | |
6227 | return 0; | |
6228 | ||
6229 | spin_lock(&nn->client_lock); | |
6230 | list_for_each_entry(clp, &nn->client_lru, cl_lru) | |
6231 | count += nfsd_print_client_openowners(clp); | |
6232 | spin_unlock(&nn->client_lock); | |
4dbdbda8 BS |
6233 | |
6234 | return count; | |
6235 | } | |
6236 | ||
82e05efa JL |
6237 | static void |
6238 | nfsd_reap_openowners(struct list_head *reaplist) | |
6239 | { | |
6240 | struct nfs4_client *clp; | |
6241 | struct nfs4_openowner *oop, *next; | |
6242 | ||
6243 | list_for_each_entry_safe(oop, next, reaplist, oo_perclient) { | |
6244 | list_del_init(&oop->oo_perclient); | |
6245 | clp = oop->oo_owner.so_client; | |
6246 | release_openowner(oop); | |
6247 | put_client(clp); | |
6248 | } | |
6249 | } | |
6250 | ||
6251 | u64 | |
285abdee JL |
6252 | nfsd_inject_forget_client_openowners(struct sockaddr_storage *addr, |
6253 | size_t addr_size) | |
4dbdbda8 | 6254 | { |
82e05efa JL |
6255 | unsigned int count = 0; |
6256 | struct nfs4_client *clp; | |
6257 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6258 | nfsd_net_id); | |
6259 | LIST_HEAD(reaplist); | |
6260 | ||
6261 | if (!nfsd_netns_ready(nn)) | |
6262 | return count; | |
6263 | ||
6264 | spin_lock(&nn->client_lock); | |
6265 | clp = nfsd_find_client(addr, addr_size); | |
6266 | if (clp) | |
6267 | count = nfsd_collect_client_openowners(clp, &reaplist, 0); | |
6268 | spin_unlock(&nn->client_lock); | |
6269 | nfsd_reap_openowners(&reaplist); | |
6270 | return count; | |
4dbdbda8 BS |
6271 | } |
6272 | ||
82e05efa | 6273 | u64 |
285abdee | 6274 | nfsd_inject_forget_openowners(u64 max) |
184c1847 | 6275 | { |
82e05efa JL |
6276 | u64 count = 0; |
6277 | struct nfs4_client *clp; | |
6278 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6279 | nfsd_net_id); | |
6280 | LIST_HEAD(reaplist); | |
6281 | ||
6282 | if (!nfsd_netns_ready(nn)) | |
6283 | return count; | |
6284 | ||
6285 | spin_lock(&nn->client_lock); | |
6286 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
6287 | count += nfsd_collect_client_openowners(clp, &reaplist, | |
6288 | max - count); | |
6289 | if (max != 0 && count >= max) | |
6290 | break; | |
6291 | } | |
6292 | spin_unlock(&nn->client_lock); | |
6293 | nfsd_reap_openowners(&reaplist); | |
184c1847 BS |
6294 | return count; |
6295 | } | |
6296 | ||
269de30f BS |
6297 | static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max, |
6298 | struct list_head *victims) | |
6299 | { | |
6300 | struct nfs4_delegation *dp, *next; | |
98d5c7c5 JL |
6301 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, |
6302 | nfsd_net_id); | |
269de30f BS |
6303 | u64 count = 0; |
6304 | ||
98d5c7c5 JL |
6305 | lockdep_assert_held(&nn->client_lock); |
6306 | ||
6307 | spin_lock(&state_lock); | |
269de30f | 6308 | list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) { |
dff1399f JL |
6309 | if (victims) { |
6310 | /* | |
6311 | * It's not safe to mess with delegations that have a | |
6312 | * non-zero dl_time. They might have already been broken | |
6313 | * and could be processed by the laundromat outside of | |
6314 | * the state_lock. Just leave them be. | |
6315 | */ | |
6316 | if (dp->dl_time != 0) | |
6317 | continue; | |
6318 | ||
98d5c7c5 | 6319 | atomic_inc(&clp->cl_refcount); |
42690676 JL |
6320 | unhash_delegation_locked(dp); |
6321 | list_add(&dp->dl_recall_lru, victims); | |
dff1399f | 6322 | } |
98d5c7c5 JL |
6323 | ++count; |
6324 | /* | |
6325 | * Despite the fact that these functions deal with | |
6326 | * 64-bit integers for "count", we must ensure that | |
6327 | * it doesn't blow up the clp->cl_refcount. Throw a | |
6328 | * warning if we start to approach INT_MAX here. | |
6329 | */ | |
6330 | WARN_ON_ONCE(count == (INT_MAX / 2)); | |
6331 | if (count == max) | |
269de30f BS |
6332 | break; |
6333 | } | |
98d5c7c5 | 6334 | spin_unlock(&state_lock); |
269de30f BS |
6335 | return count; |
6336 | } | |
6337 | ||
98d5c7c5 JL |
6338 | static u64 |
6339 | nfsd_print_client_delegations(struct nfs4_client *clp) | |
269de30f | 6340 | { |
98d5c7c5 | 6341 | u64 count = nfsd_find_all_delegations(clp, 0, NULL); |
269de30f | 6342 | |
98d5c7c5 JL |
6343 | nfsd_print_count(clp, count, "delegations"); |
6344 | return count; | |
6345 | } | |
6346 | ||
6347 | u64 | |
285abdee | 6348 | nfsd_inject_print_delegations(void) |
98d5c7c5 JL |
6349 | { |
6350 | struct nfs4_client *clp; | |
6351 | u64 count = 0; | |
6352 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6353 | nfsd_net_id); | |
6354 | ||
6355 | if (!nfsd_netns_ready(nn)) | |
6356 | return 0; | |
269de30f | 6357 | |
98d5c7c5 JL |
6358 | spin_lock(&nn->client_lock); |
6359 | list_for_each_entry(clp, &nn->client_lru, cl_lru) | |
6360 | count += nfsd_print_client_delegations(clp); | |
6361 | spin_unlock(&nn->client_lock); | |
6362 | ||
6363 | return count; | |
6364 | } | |
6365 | ||
6366 | static void | |
6367 | nfsd_forget_delegations(struct list_head *reaplist) | |
6368 | { | |
6369 | struct nfs4_client *clp; | |
6370 | struct nfs4_delegation *dp, *next; | |
6371 | ||
6372 | list_for_each_entry_safe(dp, next, reaplist, dl_recall_lru) { | |
2d4a532d | 6373 | list_del_init(&dp->dl_recall_lru); |
98d5c7c5 | 6374 | clp = dp->dl_stid.sc_client; |
3bd64a5b | 6375 | revoke_delegation(dp); |
98d5c7c5 | 6376 | put_client(clp); |
2d4a532d | 6377 | } |
98d5c7c5 JL |
6378 | } |
6379 | ||
6380 | u64 | |
285abdee JL |
6381 | nfsd_inject_forget_client_delegations(struct sockaddr_storage *addr, |
6382 | size_t addr_size) | |
98d5c7c5 JL |
6383 | { |
6384 | u64 count = 0; | |
6385 | struct nfs4_client *clp; | |
6386 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6387 | nfsd_net_id); | |
6388 | LIST_HEAD(reaplist); | |
6389 | ||
6390 | if (!nfsd_netns_ready(nn)) | |
6391 | return count; | |
6392 | ||
6393 | spin_lock(&nn->client_lock); | |
6394 | clp = nfsd_find_client(addr, addr_size); | |
6395 | if (clp) | |
6396 | count = nfsd_find_all_delegations(clp, 0, &reaplist); | |
6397 | spin_unlock(&nn->client_lock); | |
6398 | ||
6399 | nfsd_forget_delegations(&reaplist); | |
6400 | return count; | |
6401 | } | |
269de30f | 6402 | |
98d5c7c5 | 6403 | u64 |
285abdee | 6404 | nfsd_inject_forget_delegations(u64 max) |
98d5c7c5 JL |
6405 | { |
6406 | u64 count = 0; | |
6407 | struct nfs4_client *clp; | |
6408 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6409 | nfsd_net_id); | |
6410 | LIST_HEAD(reaplist); | |
6411 | ||
6412 | if (!nfsd_netns_ready(nn)) | |
6413 | return count; | |
6414 | ||
6415 | spin_lock(&nn->client_lock); | |
6416 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
6417 | count += nfsd_find_all_delegations(clp, max - count, &reaplist); | |
6418 | if (max != 0 && count >= max) | |
6419 | break; | |
6420 | } | |
6421 | spin_unlock(&nn->client_lock); | |
6422 | nfsd_forget_delegations(&reaplist); | |
269de30f BS |
6423 | return count; |
6424 | } | |
6425 | ||
98d5c7c5 JL |
6426 | static void |
6427 | nfsd_recall_delegations(struct list_head *reaplist) | |
269de30f | 6428 | { |
98d5c7c5 JL |
6429 | struct nfs4_client *clp; |
6430 | struct nfs4_delegation *dp, *next; | |
269de30f | 6431 | |
98d5c7c5 | 6432 | list_for_each_entry_safe(dp, next, reaplist, dl_recall_lru) { |
dff1399f | 6433 | list_del_init(&dp->dl_recall_lru); |
98d5c7c5 JL |
6434 | clp = dp->dl_stid.sc_client; |
6435 | /* | |
6436 | * We skipped all entries that had a zero dl_time before, | |
6437 | * so we can now reset the dl_time back to 0. If a delegation | |
6438 | * break comes in now, then it won't make any difference since | |
6439 | * we're recalling it either way. | |
6440 | */ | |
6441 | spin_lock(&state_lock); | |
dff1399f | 6442 | dp->dl_time = 0; |
98d5c7c5 | 6443 | spin_unlock(&state_lock); |
269de30f | 6444 | nfsd_break_one_deleg(dp); |
98d5c7c5 | 6445 | put_client(clp); |
dff1399f | 6446 | } |
98d5c7c5 | 6447 | } |
269de30f | 6448 | |
98d5c7c5 | 6449 | u64 |
285abdee | 6450 | nfsd_inject_recall_client_delegations(struct sockaddr_storage *addr, |
98d5c7c5 JL |
6451 | size_t addr_size) |
6452 | { | |
6453 | u64 count = 0; | |
6454 | struct nfs4_client *clp; | |
6455 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6456 | nfsd_net_id); | |
6457 | LIST_HEAD(reaplist); | |
6458 | ||
6459 | if (!nfsd_netns_ready(nn)) | |
6460 | return count; | |
6461 | ||
6462 | spin_lock(&nn->client_lock); | |
6463 | clp = nfsd_find_client(addr, addr_size); | |
6464 | if (clp) | |
6465 | count = nfsd_find_all_delegations(clp, 0, &reaplist); | |
6466 | spin_unlock(&nn->client_lock); | |
6467 | ||
6468 | nfsd_recall_delegations(&reaplist); | |
269de30f BS |
6469 | return count; |
6470 | } | |
6471 | ||
98d5c7c5 | 6472 | u64 |
285abdee | 6473 | nfsd_inject_recall_delegations(u64 max) |
184c1847 BS |
6474 | { |
6475 | u64 count = 0; | |
98d5c7c5 JL |
6476 | struct nfs4_client *clp, *next; |
6477 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6478 | nfsd_net_id); | |
6479 | LIST_HEAD(reaplist); | |
184c1847 | 6480 | |
98d5c7c5 JL |
6481 | if (!nfsd_netns_ready(nn)) |
6482 | return count; | |
184c1847 | 6483 | |
98d5c7c5 JL |
6484 | spin_lock(&nn->client_lock); |
6485 | list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { | |
6486 | count += nfsd_find_all_delegations(clp, max - count, &reaplist); | |
6487 | if (max != 0 && ++count >= max) | |
6488 | break; | |
6489 | } | |
6490 | spin_unlock(&nn->client_lock); | |
6491 | nfsd_recall_delegations(&reaplist); | |
184c1847 BS |
6492 | return count; |
6493 | } | |
65178db4 BS |
6494 | #endif /* CONFIG_NFSD_FAULT_INJECTION */ |
6495 | ||
c2f1a551 MS |
6496 | /* |
6497 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
6498 | * client may quite reasonably hang on to a delegation as long as it has | |
6499 | * the inode cached. This becomes an obvious problem the first time a | |
6500 | * client's inode cache approaches the size of the server's total memory. | |
6501 | * | |
6502 | * For now we avoid this problem by imposing a hard limit on the number | |
6503 | * of delegations, which varies according to the server's memory size. | |
6504 | */ | |
6505 | static void | |
6506 | set_max_delegations(void) | |
6507 | { | |
6508 | /* | |
6509 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
6510 | * estimates suggest that in the worst case (where every delegation | |
6511 | * is for a different inode), a delegation could take about 1.5K, | |
6512 | * giving a worst case usage of about 6% of memory. | |
6513 | */ | |
6514 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
6515 | } | |
6516 | ||
d85ed443 | 6517 | static int nfs4_state_create_net(struct net *net) |
8daae4dc SK |
6518 | { |
6519 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
6520 | int i; | |
6521 | ||
6522 | nn->conf_id_hashtbl = kmalloc(sizeof(struct list_head) * | |
6523 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
6524 | if (!nn->conf_id_hashtbl) | |
382a62e7 | 6525 | goto err; |
0a7ec377 SK |
6526 | nn->unconf_id_hashtbl = kmalloc(sizeof(struct list_head) * |
6527 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
6528 | if (!nn->unconf_id_hashtbl) | |
6529 | goto err_unconf_id; | |
1872de0e SK |
6530 | nn->sessionid_hashtbl = kmalloc(sizeof(struct list_head) * |
6531 | SESSION_HASH_SIZE, GFP_KERNEL); | |
6532 | if (!nn->sessionid_hashtbl) | |
6533 | goto err_sessionid; | |
8daae4dc | 6534 | |
382a62e7 | 6535 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
8daae4dc | 6536 | INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]); |
0a7ec377 | 6537 | INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]); |
382a62e7 | 6538 | } |
1872de0e SK |
6539 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
6540 | INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]); | |
382a62e7 | 6541 | nn->conf_name_tree = RB_ROOT; |
a99454aa | 6542 | nn->unconf_name_tree = RB_ROOT; |
5ed58bb2 | 6543 | INIT_LIST_HEAD(&nn->client_lru); |
73758fed | 6544 | INIT_LIST_HEAD(&nn->close_lru); |
e8c69d17 | 6545 | INIT_LIST_HEAD(&nn->del_recall_lru); |
c9a49628 | 6546 | spin_lock_init(&nn->client_lock); |
8daae4dc | 6547 | |
09121281 | 6548 | INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main); |
d85ed443 | 6549 | get_net(net); |
09121281 | 6550 | |
8daae4dc | 6551 | return 0; |
382a62e7 | 6552 | |
1872de0e | 6553 | err_sessionid: |
9b531137 | 6554 | kfree(nn->unconf_id_hashtbl); |
0a7ec377 SK |
6555 | err_unconf_id: |
6556 | kfree(nn->conf_id_hashtbl); | |
382a62e7 SK |
6557 | err: |
6558 | return -ENOMEM; | |
8daae4dc SK |
6559 | } |
6560 | ||
6561 | static void | |
4dce0ac9 | 6562 | nfs4_state_destroy_net(struct net *net) |
8daae4dc SK |
6563 | { |
6564 | int i; | |
6565 | struct nfs4_client *clp = NULL; | |
6566 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
6567 | ||
6568 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { | |
6569 | while (!list_empty(&nn->conf_id_hashtbl[i])) { | |
6570 | clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
6571 | destroy_client(clp); | |
6572 | } | |
6573 | } | |
a99454aa | 6574 | |
2b905635 KM |
6575 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
6576 | while (!list_empty(&nn->unconf_id_hashtbl[i])) { | |
6577 | clp = list_entry(nn->unconf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
6578 | destroy_client(clp); | |
6579 | } | |
a99454aa SK |
6580 | } |
6581 | ||
1872de0e | 6582 | kfree(nn->sessionid_hashtbl); |
0a7ec377 | 6583 | kfree(nn->unconf_id_hashtbl); |
8daae4dc | 6584 | kfree(nn->conf_id_hashtbl); |
4dce0ac9 | 6585 | put_net(net); |
8daae4dc SK |
6586 | } |
6587 | ||
f252bc68 | 6588 | int |
d85ed443 | 6589 | nfs4_state_start_net(struct net *net) |
ac4d8ff2 | 6590 | { |
5e1533c7 | 6591 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b5a1a81e BF |
6592 | int ret; |
6593 | ||
d85ed443 | 6594 | ret = nfs4_state_create_net(net); |
8daae4dc SK |
6595 | if (ret) |
6596 | return ret; | |
2c142baa | 6597 | nn->boot_time = get_seconds(); |
a51c84ed | 6598 | nn->grace_ended = false; |
d4318acd JL |
6599 | locks_start_grace(net, &nn->nfsd4_manager); |
6600 | nfsd4_client_tracking_init(net); | |
d85ed443 | 6601 | printk(KERN_INFO "NFSD: starting %ld-second grace period (net %p)\n", |
5284b44e SK |
6602 | nn->nfsd4_grace, net); |
6603 | queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ); | |
d85ed443 SK |
6604 | return 0; |
6605 | } | |
6606 | ||
6607 | /* initialization to perform when the nfsd service is started: */ | |
6608 | ||
6609 | int | |
6610 | nfs4_state_start(void) | |
6611 | { | |
6612 | int ret; | |
6613 | ||
b5a1a81e | 6614 | ret = set_callback_cred(); |
d85ed443 SK |
6615 | if (ret) |
6616 | return -ENOMEM; | |
58da282b | 6617 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
a6d6b781 JL |
6618 | if (laundry_wq == NULL) { |
6619 | ret = -ENOMEM; | |
6620 | goto out_recovery; | |
6621 | } | |
b5a1a81e BF |
6622 | ret = nfsd4_create_callback_queue(); |
6623 | if (ret) | |
6624 | goto out_free_laundry; | |
09121281 | 6625 | |
c2f1a551 | 6626 | set_max_delegations(); |
d85ed443 | 6627 | |
b5a1a81e | 6628 | return 0; |
d85ed443 | 6629 | |
b5a1a81e BF |
6630 | out_free_laundry: |
6631 | destroy_workqueue(laundry_wq); | |
a6d6b781 | 6632 | out_recovery: |
b5a1a81e | 6633 | return ret; |
1da177e4 LT |
6634 | } |
6635 | ||
f252bc68 | 6636 | void |
4dce0ac9 | 6637 | nfs4_state_shutdown_net(struct net *net) |
1da177e4 | 6638 | { |
1da177e4 | 6639 | struct nfs4_delegation *dp = NULL; |
1da177e4 | 6640 | struct list_head *pos, *next, reaplist; |
4dce0ac9 | 6641 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
1da177e4 | 6642 | |
4dce0ac9 SK |
6643 | cancel_delayed_work_sync(&nn->laundromat_work); |
6644 | locks_end_grace(&nn->nfsd4_manager); | |
ac55fdc4 | 6645 | |
1da177e4 | 6646 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 6647 | spin_lock(&state_lock); |
e8c69d17 | 6648 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 | 6649 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
42690676 JL |
6650 | unhash_delegation_locked(dp); |
6651 | list_add(&dp->dl_recall_lru, &reaplist); | |
1da177e4 | 6652 | } |
cdc97505 | 6653 | spin_unlock(&state_lock); |
1da177e4 LT |
6654 | list_for_each_safe(pos, next, &reaplist) { |
6655 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
42690676 | 6656 | list_del_init(&dp->dl_recall_lru); |
8287f009 | 6657 | put_clnt_odstate(dp->dl_clnt_odstate); |
afbda402 | 6658 | nfs4_put_deleg_lease(dp->dl_stid.sc_file); |
6011695d | 6659 | nfs4_put_stid(&dp->dl_stid); |
1da177e4 LT |
6660 | } |
6661 | ||
3320fef1 | 6662 | nfsd4_client_tracking_exit(net); |
4dce0ac9 | 6663 | nfs4_state_destroy_net(net); |
1da177e4 LT |
6664 | } |
6665 | ||
6666 | void | |
6667 | nfs4_state_shutdown(void) | |
6668 | { | |
5e8d5c29 | 6669 | destroy_workqueue(laundry_wq); |
c3935e30 | 6670 | nfsd4_destroy_callback_queue(); |
1da177e4 | 6671 | } |
8b70484c TM |
6672 | |
6673 | static void | |
6674 | get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
6675 | { | |
37c593c5 TM |
6676 | if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) |
6677 | memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); | |
8b70484c TM |
6678 | } |
6679 | ||
6680 | static void | |
6681 | put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
6682 | { | |
37c593c5 TM |
6683 | if (cstate->minorversion) { |
6684 | memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); | |
6685 | SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
6686 | } | |
6687 | } | |
6688 | ||
6689 | void | |
6690 | clear_current_stateid(struct nfsd4_compound_state *cstate) | |
6691 | { | |
6692 | CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
8b70484c TM |
6693 | } |
6694 | ||
62cd4a59 TM |
6695 | /* |
6696 | * functions to set current state id | |
6697 | */ | |
9428fe1a TM |
6698 | void |
6699 | nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
6700 | { | |
6701 | put_stateid(cstate, &odp->od_stateid); | |
6702 | } | |
6703 | ||
8b70484c TM |
6704 | void |
6705 | nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) | |
6706 | { | |
6707 | put_stateid(cstate, &open->op_stateid); | |
6708 | } | |
6709 | ||
62cd4a59 TM |
6710 | void |
6711 | nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
6712 | { | |
6713 | put_stateid(cstate, &close->cl_stateid); | |
6714 | } | |
6715 | ||
6716 | void | |
6717 | nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) | |
6718 | { | |
6719 | put_stateid(cstate, &lock->lk_resp_stateid); | |
6720 | } | |
6721 | ||
6722 | /* | |
6723 | * functions to consume current state id | |
6724 | */ | |
1e97b519 | 6725 | |
9428fe1a TM |
6726 | void |
6727 | nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
6728 | { | |
6729 | get_stateid(cstate, &odp->od_stateid); | |
6730 | } | |
6731 | ||
6732 | void | |
6733 | nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) | |
6734 | { | |
6735 | get_stateid(cstate, &drp->dr_stateid); | |
6736 | } | |
6737 | ||
1e97b519 TM |
6738 | void |
6739 | nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) | |
6740 | { | |
6741 | get_stateid(cstate, &fsp->fr_stateid); | |
6742 | } | |
6743 | ||
6744 | void | |
6745 | nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) | |
6746 | { | |
6747 | get_stateid(cstate, &setattr->sa_stateid); | |
6748 | } | |
6749 | ||
8b70484c TM |
6750 | void |
6751 | nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
6752 | { | |
6753 | get_stateid(cstate, &close->cl_stateid); | |
6754 | } | |
6755 | ||
6756 | void | |
62cd4a59 | 6757 | nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) |
8b70484c | 6758 | { |
62cd4a59 | 6759 | get_stateid(cstate, &locku->lu_stateid); |
8b70484c | 6760 | } |
30813e27 TM |
6761 | |
6762 | void | |
6763 | nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) | |
6764 | { | |
6765 | get_stateid(cstate, &read->rd_stateid); | |
6766 | } | |
6767 | ||
6768 | void | |
6769 | nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) | |
6770 | { | |
6771 | get_stateid(cstate, &write->wr_stateid); | |
6772 | } |