Commit | Line | Data |
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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (c) 2001 The Regents of the University of Michigan. |
3 | * All rights reserved. | |
4 | * | |
5 | * Kendrick Smith <kmsmith@umich.edu> | |
6 | * Andy Adamson <kandros@umich.edu> | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * | |
12 | * 1. Redistributions of source code must retain the above copyright | |
13 | * notice, this list of conditions and the following disclaimer. | |
14 | * 2. Redistributions in binary form must reproduce the above copyright | |
15 | * notice, this list of conditions and the following disclaimer in the | |
16 | * documentation and/or other materials provided with the distribution. | |
17 | * 3. Neither the name of the University nor the names of its | |
18 | * contributors may be used to endorse or promote products derived | |
19 | * from this software without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
22 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
23 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
24 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
26 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
27 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
28 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
29 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
30 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
31 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
32 | * | |
33 | */ | |
34 | ||
aceaf78d | 35 | #include <linux/file.h> |
b89f4321 | 36 | #include <linux/fs.h> |
5a0e3ad6 | 37 | #include <linux/slab.h> |
0964a3d3 | 38 | #include <linux/namei.h> |
c2f1a551 | 39 | #include <linux/swap.h> |
17456804 | 40 | #include <linux/pagemap.h> |
7df302f7 | 41 | #include <linux/ratelimit.h> |
68e76ad0 | 42 | #include <linux/sunrpc/svcauth_gss.h> |
5976687a | 43 | #include <linux/sunrpc/addr.h> |
6282cd56 | 44 | #include <linux/hash.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 SK |
50 | #include "netns.h" |
51 | ||
1da177e4 LT |
52 | #define NFSDDBG_FACILITY NFSDDBG_PROC |
53 | ||
f32f3c2d BF |
54 | #define all_ones {{~0,~0},~0} |
55 | static const stateid_t one_stateid = { | |
56 | .si_generation = ~0, | |
57 | .si_opaque = all_ones, | |
58 | }; | |
59 | static const stateid_t zero_stateid = { | |
60 | /* all fields zero */ | |
61 | }; | |
19ff0f28 TM |
62 | static const stateid_t currentstateid = { |
63 | .si_generation = 1, | |
64 | }; | |
f32f3c2d | 65 | |
ec6b5d7b | 66 | static u64 current_sessionid = 1; |
fd39ca9a | 67 | |
f32f3c2d BF |
68 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t))) |
69 | #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t))) | |
19ff0f28 | 70 | #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t))) |
1da177e4 | 71 | |
1da177e4 | 72 | /* forward declarations */ |
f9c00c3a | 73 | static bool check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner); |
6011695d | 74 | static void nfs4_free_ol_stateid(struct nfs4_stid *stid); |
1da177e4 | 75 | |
8b671b80 BF |
76 | /* Locking: */ |
77 | ||
78 | /* Currently used for almost all code touching nfsv4 state: */ | |
353ab6e9 | 79 | static DEFINE_MUTEX(client_mutex); |
1da177e4 | 80 | |
8b671b80 BF |
81 | /* |
82 | * Currently used for the del_recall_lru and file hash table. In an | |
83 | * effort to decrease the scope of the client_mutex, this spinlock may | |
84 | * eventually cover more: | |
85 | */ | |
cdc97505 | 86 | static DEFINE_SPINLOCK(state_lock); |
8b671b80 | 87 | |
b401be22 JL |
88 | /* |
89 | * A waitqueue for all in-progress 4.0 CLOSE operations that are waiting for | |
90 | * the refcount on the open stateid to drop. | |
91 | */ | |
92 | static DECLARE_WAIT_QUEUE_HEAD(close_wq); | |
93 | ||
abf1135b CH |
94 | static struct kmem_cache *openowner_slab; |
95 | static struct kmem_cache *lockowner_slab; | |
96 | static struct kmem_cache *file_slab; | |
97 | static struct kmem_cache *stateid_slab; | |
98 | static struct kmem_cache *deleg_slab; | |
e60d4398 | 99 | |
1da177e4 LT |
100 | void |
101 | nfs4_lock_state(void) | |
102 | { | |
353ab6e9 | 103 | mutex_lock(&client_mutex); |
1da177e4 LT |
104 | } |
105 | ||
66b2b9b2 | 106 | static void free_session(struct nfsd4_session *); |
508dc6e1 | 107 | |
f0f51f5c | 108 | static bool is_session_dead(struct nfsd4_session *ses) |
66b2b9b2 | 109 | { |
f0f51f5c | 110 | return ses->se_flags & NFS4_SESSION_DEAD; |
66b2b9b2 BF |
111 | } |
112 | ||
f0f51f5c | 113 | static __be32 mark_session_dead_locked(struct nfsd4_session *ses, int ref_held_by_me) |
508dc6e1 | 114 | { |
f0f51f5c | 115 | if (atomic_read(&ses->se_ref) > ref_held_by_me) |
66b2b9b2 BF |
116 | return nfserr_jukebox; |
117 | ses->se_flags |= NFS4_SESSION_DEAD; | |
118 | return nfs_ok; | |
508dc6e1 BH |
119 | } |
120 | ||
1da177e4 LT |
121 | void |
122 | nfs4_unlock_state(void) | |
123 | { | |
353ab6e9 | 124 | mutex_unlock(&client_mutex); |
1da177e4 LT |
125 | } |
126 | ||
221a6876 BF |
127 | static bool is_client_expired(struct nfs4_client *clp) |
128 | { | |
129 | return clp->cl_time == 0; | |
130 | } | |
131 | ||
132 | static __be32 mark_client_expired_locked(struct nfs4_client *clp) | |
133 | { | |
134 | if (atomic_read(&clp->cl_refcount)) | |
135 | return nfserr_jukebox; | |
136 | clp->cl_time = 0; | |
137 | return nfs_ok; | |
138 | } | |
139 | ||
140 | static __be32 mark_client_expired(struct nfs4_client *clp) | |
141 | { | |
142 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
143 | __be32 ret; | |
144 | ||
145 | spin_lock(&nn->client_lock); | |
146 | ret = mark_client_expired_locked(clp); | |
147 | spin_unlock(&nn->client_lock); | |
148 | return ret; | |
149 | } | |
150 | ||
151 | static __be32 get_client_locked(struct nfs4_client *clp) | |
152 | { | |
153 | if (is_client_expired(clp)) | |
154 | return nfserr_expired; | |
155 | atomic_inc(&clp->cl_refcount); | |
156 | return nfs_ok; | |
157 | } | |
158 | ||
159 | /* must be called under the client_lock */ | |
160 | static inline void | |
161 | renew_client_locked(struct nfs4_client *clp) | |
162 | { | |
163 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
164 | ||
165 | if (is_client_expired(clp)) { | |
166 | WARN_ON(1); | |
167 | printk("%s: client (clientid %08x/%08x) already expired\n", | |
168 | __func__, | |
169 | clp->cl_clientid.cl_boot, | |
170 | clp->cl_clientid.cl_id); | |
171 | return; | |
172 | } | |
173 | ||
174 | dprintk("renewing client (clientid %08x/%08x)\n", | |
175 | clp->cl_clientid.cl_boot, | |
176 | clp->cl_clientid.cl_id); | |
177 | list_move_tail(&clp->cl_lru, &nn->client_lru); | |
178 | clp->cl_time = get_seconds(); | |
179 | } | |
180 | ||
181 | static inline void | |
182 | renew_client(struct nfs4_client *clp) | |
183 | { | |
184 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
185 | ||
186 | spin_lock(&nn->client_lock); | |
187 | renew_client_locked(clp); | |
188 | spin_unlock(&nn->client_lock); | |
189 | } | |
190 | ||
ba138435 | 191 | static void put_client_renew_locked(struct nfs4_client *clp) |
221a6876 BF |
192 | { |
193 | if (!atomic_dec_and_test(&clp->cl_refcount)) | |
194 | return; | |
195 | if (!is_client_expired(clp)) | |
196 | renew_client_locked(clp); | |
197 | } | |
198 | ||
4b24ca7d JL |
199 | static void put_client_renew(struct nfs4_client *clp) |
200 | { | |
201 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
202 | ||
d6c249b4 JL |
203 | if (!atomic_dec_and_lock(&clp->cl_refcount, &nn->client_lock)) |
204 | return; | |
205 | if (!is_client_expired(clp)) | |
206 | renew_client_locked(clp); | |
4b24ca7d JL |
207 | spin_unlock(&nn->client_lock); |
208 | } | |
209 | ||
d4e19e70 TM |
210 | static __be32 nfsd4_get_session_locked(struct nfsd4_session *ses) |
211 | { | |
212 | __be32 status; | |
213 | ||
214 | if (is_session_dead(ses)) | |
215 | return nfserr_badsession; | |
216 | status = get_client_locked(ses->se_client); | |
217 | if (status) | |
218 | return status; | |
219 | atomic_inc(&ses->se_ref); | |
220 | return nfs_ok; | |
221 | } | |
222 | ||
223 | static void nfsd4_put_session_locked(struct nfsd4_session *ses) | |
224 | { | |
225 | struct nfs4_client *clp = ses->se_client; | |
226 | ||
227 | if (atomic_dec_and_test(&ses->se_ref) && is_session_dead(ses)) | |
228 | free_session(ses); | |
229 | put_client_renew_locked(clp); | |
230 | } | |
231 | ||
232 | static void nfsd4_put_session(struct nfsd4_session *ses) | |
233 | { | |
234 | struct nfs4_client *clp = ses->se_client; | |
235 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
236 | ||
237 | spin_lock(&nn->client_lock); | |
238 | nfsd4_put_session_locked(ses); | |
239 | spin_unlock(&nn->client_lock); | |
240 | } | |
241 | ||
7ffb5880 | 242 | static int |
d4f0489f | 243 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner) |
7ffb5880 TM |
244 | { |
245 | return (sop->so_owner.len == owner->len) && | |
d4f0489f | 246 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len); |
7ffb5880 TM |
247 | } |
248 | ||
249 | static struct nfs4_openowner * | |
250 | find_openstateowner_str_locked(unsigned int hashval, struct nfsd4_open *open, | |
d4f0489f | 251 | struct nfs4_client *clp) |
7ffb5880 TM |
252 | { |
253 | struct nfs4_stateowner *so; | |
7ffb5880 | 254 | |
d4f0489f | 255 | lockdep_assert_held(&clp->cl_lock); |
7ffb5880 | 256 | |
d4f0489f TM |
257 | list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[hashval], |
258 | so_strhash) { | |
7ffb5880 TM |
259 | if (!so->so_is_open_owner) |
260 | continue; | |
d4f0489f | 261 | if (same_owner_str(so, &open->op_owner)) { |
7ffb5880 | 262 | atomic_inc(&so->so_count); |
d4f0489f | 263 | return openowner(so); |
7ffb5880 TM |
264 | } |
265 | } | |
266 | return NULL; | |
267 | } | |
268 | ||
269 | static struct nfs4_openowner * | |
270 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, | |
d4f0489f | 271 | struct nfs4_client *clp) |
7ffb5880 TM |
272 | { |
273 | struct nfs4_openowner *oo; | |
274 | ||
d4f0489f TM |
275 | spin_lock(&clp->cl_lock); |
276 | oo = find_openstateowner_str_locked(hashval, open, clp); | |
277 | spin_unlock(&clp->cl_lock); | |
7ffb5880 TM |
278 | return oo; |
279 | } | |
280 | ||
1da177e4 LT |
281 | static inline u32 |
282 | opaque_hashval(const void *ptr, int nbytes) | |
283 | { | |
284 | unsigned char *cptr = (unsigned char *) ptr; | |
285 | ||
286 | u32 x = 0; | |
287 | while (nbytes--) { | |
288 | x *= 37; | |
289 | x += *cptr++; | |
290 | } | |
291 | return x; | |
292 | } | |
293 | ||
32513b40 BF |
294 | static void nfsd4_free_file(struct nfs4_file *f) |
295 | { | |
296 | kmem_cache_free(file_slab, f); | |
297 | } | |
298 | ||
13cd2184 N |
299 | static inline void |
300 | put_nfs4_file(struct nfs4_file *fi) | |
301 | { | |
02e1215f JL |
302 | might_lock(&state_lock); |
303 | ||
cdc97505 | 304 | if (atomic_dec_and_lock(&fi->fi_ref, &state_lock)) { |
89876f8c | 305 | hlist_del(&fi->fi_hash); |
cdc97505 | 306 | spin_unlock(&state_lock); |
32513b40 | 307 | nfsd4_free_file(fi); |
8b671b80 | 308 | } |
13cd2184 N |
309 | } |
310 | ||
311 | static inline void | |
312 | get_nfs4_file(struct nfs4_file *fi) | |
313 | { | |
8b671b80 | 314 | atomic_inc(&fi->fi_ref); |
13cd2184 N |
315 | } |
316 | ||
de18643d TM |
317 | static struct file * |
318 | __nfs4_get_fd(struct nfs4_file *f, int oflag) | |
319 | { | |
320 | if (f->fi_fds[oflag]) | |
321 | return get_file(f->fi_fds[oflag]); | |
322 | return NULL; | |
323 | } | |
324 | ||
325 | static struct file * | |
326 | find_writeable_file_locked(struct nfs4_file *f) | |
327 | { | |
328 | struct file *ret; | |
329 | ||
330 | lockdep_assert_held(&f->fi_lock); | |
331 | ||
332 | ret = __nfs4_get_fd(f, O_WRONLY); | |
333 | if (!ret) | |
334 | ret = __nfs4_get_fd(f, O_RDWR); | |
335 | return ret; | |
336 | } | |
337 | ||
338 | static struct file * | |
339 | find_writeable_file(struct nfs4_file *f) | |
340 | { | |
341 | struct file *ret; | |
342 | ||
343 | spin_lock(&f->fi_lock); | |
344 | ret = find_writeable_file_locked(f); | |
345 | spin_unlock(&f->fi_lock); | |
346 | ||
347 | return ret; | |
348 | } | |
349 | ||
350 | static struct file *find_readable_file_locked(struct nfs4_file *f) | |
351 | { | |
352 | struct file *ret; | |
353 | ||
354 | lockdep_assert_held(&f->fi_lock); | |
355 | ||
356 | ret = __nfs4_get_fd(f, O_RDONLY); | |
357 | if (!ret) | |
358 | ret = __nfs4_get_fd(f, O_RDWR); | |
359 | return ret; | |
360 | } | |
361 | ||
362 | static struct file * | |
363 | find_readable_file(struct nfs4_file *f) | |
364 | { | |
365 | struct file *ret; | |
366 | ||
367 | spin_lock(&f->fi_lock); | |
368 | ret = find_readable_file_locked(f); | |
369 | spin_unlock(&f->fi_lock); | |
370 | ||
371 | return ret; | |
372 | } | |
373 | ||
374 | static struct file * | |
375 | find_any_file(struct nfs4_file *f) | |
376 | { | |
377 | struct file *ret; | |
378 | ||
379 | spin_lock(&f->fi_lock); | |
380 | ret = __nfs4_get_fd(f, O_RDWR); | |
381 | if (!ret) { | |
382 | ret = __nfs4_get_fd(f, O_WRONLY); | |
383 | if (!ret) | |
384 | ret = __nfs4_get_fd(f, O_RDONLY); | |
385 | } | |
386 | spin_unlock(&f->fi_lock); | |
387 | return ret; | |
388 | } | |
389 | ||
02a3508d | 390 | static atomic_long_t num_delegations; |
697ce9be | 391 | unsigned long max_delegations; |
ef0f3390 N |
392 | |
393 | /* | |
394 | * Open owner state (share locks) | |
395 | */ | |
396 | ||
16bfdaaf BF |
397 | /* hash tables for lock and open owners */ |
398 | #define OWNER_HASH_BITS 8 | |
399 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
400 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
ef0f3390 | 401 | |
d4f0489f | 402 | static unsigned int ownerstr_hashval(struct xdr_netobj *ownername) |
ddc04c41 BF |
403 | { |
404 | unsigned int ret; | |
405 | ||
406 | ret = opaque_hashval(ownername->data, ownername->len); | |
16bfdaaf | 407 | return ret & OWNER_HASH_MASK; |
ddc04c41 | 408 | } |
ef0f3390 | 409 | |
ef0f3390 N |
410 | /* hash table for nfs4_file */ |
411 | #define FILE_HASH_BITS 8 | |
412 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
35079582 | 413 | |
ca943217 | 414 | static unsigned int nfsd_fh_hashval(struct knfsd_fh *fh) |
ddc04c41 | 415 | { |
ca943217 TM |
416 | return jhash2(fh->fh_base.fh_pad, XDR_QUADLEN(fh->fh_size), 0); |
417 | } | |
418 | ||
419 | static unsigned int file_hashval(struct knfsd_fh *fh) | |
420 | { | |
421 | return nfsd_fh_hashval(fh) & (FILE_HASH_SIZE - 1); | |
422 | } | |
423 | ||
424 | static bool nfsd_fh_match(struct knfsd_fh *fh1, struct knfsd_fh *fh2) | |
425 | { | |
426 | return fh1->fh_size == fh2->fh_size && | |
427 | !memcmp(fh1->fh_base.fh_pad, | |
428 | fh2->fh_base.fh_pad, | |
429 | fh1->fh_size); | |
ddc04c41 BF |
430 | } |
431 | ||
89876f8c | 432 | static struct hlist_head file_hashtbl[FILE_HASH_SIZE]; |
ef0f3390 | 433 | |
12659651 JL |
434 | static void |
435 | __nfs4_file_get_access(struct nfs4_file *fp, u32 access) | |
3477565e | 436 | { |
7214e860 JL |
437 | lockdep_assert_held(&fp->fi_lock); |
438 | ||
12659651 JL |
439 | if (access & NFS4_SHARE_ACCESS_WRITE) |
440 | atomic_inc(&fp->fi_access[O_WRONLY]); | |
441 | if (access & NFS4_SHARE_ACCESS_READ) | |
442 | atomic_inc(&fp->fi_access[O_RDONLY]); | |
3477565e BF |
443 | } |
444 | ||
12659651 JL |
445 | static __be32 |
446 | nfs4_file_get_access(struct nfs4_file *fp, u32 access) | |
998db52c | 447 | { |
7214e860 JL |
448 | lockdep_assert_held(&fp->fi_lock); |
449 | ||
12659651 JL |
450 | /* Does this access mode make sense? */ |
451 | if (access & ~NFS4_SHARE_ACCESS_BOTH) | |
452 | return nfserr_inval; | |
453 | ||
baeb4ff0 JL |
454 | /* Does it conflict with a deny mode already set? */ |
455 | if ((access & fp->fi_share_deny) != 0) | |
456 | return nfserr_share_denied; | |
457 | ||
12659651 JL |
458 | __nfs4_file_get_access(fp, access); |
459 | return nfs_ok; | |
998db52c BF |
460 | } |
461 | ||
baeb4ff0 JL |
462 | static __be32 nfs4_file_check_deny(struct nfs4_file *fp, u32 deny) |
463 | { | |
464 | /* Common case is that there is no deny mode. */ | |
465 | if (deny) { | |
466 | /* Does this deny mode make sense? */ | |
467 | if (deny & ~NFS4_SHARE_DENY_BOTH) | |
468 | return nfserr_inval; | |
469 | ||
470 | if ((deny & NFS4_SHARE_DENY_READ) && | |
471 | atomic_read(&fp->fi_access[O_RDONLY])) | |
472 | return nfserr_share_denied; | |
473 | ||
474 | if ((deny & NFS4_SHARE_DENY_WRITE) && | |
475 | atomic_read(&fp->fi_access[O_WRONLY])) | |
476 | return nfserr_share_denied; | |
477 | } | |
478 | return nfs_ok; | |
479 | } | |
480 | ||
998db52c | 481 | static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
f9d7562f | 482 | { |
de18643d TM |
483 | might_lock(&fp->fi_lock); |
484 | ||
485 | if (atomic_dec_and_lock(&fp->fi_access[oflag], &fp->fi_lock)) { | |
486 | struct file *f1 = NULL; | |
487 | struct file *f2 = NULL; | |
488 | ||
6d338b51 | 489 | swap(f1, fp->fi_fds[oflag]); |
0c7c3e67 | 490 | if (atomic_read(&fp->fi_access[1 - oflag]) == 0) |
6d338b51 | 491 | swap(f2, fp->fi_fds[O_RDWR]); |
de18643d TM |
492 | spin_unlock(&fp->fi_lock); |
493 | if (f1) | |
494 | fput(f1); | |
495 | if (f2) | |
496 | fput(f2); | |
f9d7562f BF |
497 | } |
498 | } | |
499 | ||
12659651 | 500 | static void nfs4_file_put_access(struct nfs4_file *fp, u32 access) |
998db52c | 501 | { |
12659651 JL |
502 | WARN_ON_ONCE(access & ~NFS4_SHARE_ACCESS_BOTH); |
503 | ||
504 | if (access & NFS4_SHARE_ACCESS_WRITE) | |
998db52c | 505 | __nfs4_file_put_access(fp, O_WRONLY); |
12659651 JL |
506 | if (access & NFS4_SHARE_ACCESS_READ) |
507 | __nfs4_file_put_access(fp, O_RDONLY); | |
998db52c BF |
508 | } |
509 | ||
6011695d TM |
510 | static struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, |
511 | struct kmem_cache *slab) | |
2a74aba7 | 512 | { |
3abdb607 | 513 | struct nfs4_stid *stid; |
6136d2b4 | 514 | int new_id; |
2a74aba7 | 515 | |
f8338834 | 516 | stid = kmem_cache_zalloc(slab, GFP_KERNEL); |
3abdb607 BF |
517 | if (!stid) |
518 | return NULL; | |
519 | ||
4770d722 JL |
520 | idr_preload(GFP_KERNEL); |
521 | spin_lock(&cl->cl_lock); | |
522 | new_id = idr_alloc_cyclic(&cl->cl_stateids, stid, 0, 0, GFP_NOWAIT); | |
523 | spin_unlock(&cl->cl_lock); | |
524 | idr_preload_end(); | |
ebd6c707 | 525 | if (new_id < 0) |
3abdb607 | 526 | goto out_free; |
2a74aba7 | 527 | stid->sc_client = cl; |
3abdb607 BF |
528 | stid->sc_stateid.si_opaque.so_id = new_id; |
529 | stid->sc_stateid.si_opaque.so_clid = cl->cl_clientid; | |
2a74aba7 | 530 | /* Will be incremented before return to client: */ |
72c0b0fb | 531 | atomic_set(&stid->sc_count, 1); |
996e0938 | 532 | |
996e0938 | 533 | /* |
3abdb607 BF |
534 | * It shouldn't be a problem to reuse an opaque stateid value. |
535 | * I don't think it is for 4.1. But with 4.0 I worry that, for | |
536 | * example, a stray write retransmission could be accepted by | |
537 | * the server when it should have been rejected. Therefore, | |
538 | * adopt a trick from the sctp code to attempt to maximize the | |
539 | * amount of time until an id is reused, by ensuring they always | |
540 | * "increase" (mod INT_MAX): | |
996e0938 | 541 | */ |
3abdb607 BF |
542 | return stid; |
543 | out_free: | |
2c44a234 | 544 | kmem_cache_free(slab, stid); |
3abdb607 | 545 | return NULL; |
2a74aba7 BF |
546 | } |
547 | ||
b49e084d | 548 | static struct nfs4_ol_stateid * nfs4_alloc_open_stateid(struct nfs4_client *clp) |
4cdc951b | 549 | { |
6011695d TM |
550 | struct nfs4_stid *stid; |
551 | struct nfs4_ol_stateid *stp; | |
552 | ||
553 | stid = nfs4_alloc_stid(clp, stateid_slab); | |
554 | if (!stid) | |
555 | return NULL; | |
556 | ||
557 | stp = openlockstateid(stid); | |
558 | stp->st_stid.sc_free = nfs4_free_ol_stateid; | |
559 | return stp; | |
560 | } | |
561 | ||
562 | static void nfs4_free_deleg(struct nfs4_stid *stid) | |
563 | { | |
6011695d TM |
564 | kmem_cache_free(deleg_slab, stid); |
565 | atomic_long_dec(&num_delegations); | |
4cdc951b BF |
566 | } |
567 | ||
6282cd56 N |
568 | /* |
569 | * When we recall a delegation, we should be careful not to hand it | |
570 | * out again straight away. | |
571 | * To ensure this we keep a pair of bloom filters ('new' and 'old') | |
572 | * in which the filehandles of recalled delegations are "stored". | |
573 | * If a filehandle appear in either filter, a delegation is blocked. | |
574 | * When a delegation is recalled, the filehandle is stored in the "new" | |
575 | * filter. | |
576 | * Every 30 seconds we swap the filters and clear the "new" one, | |
577 | * unless both are empty of course. | |
578 | * | |
579 | * Each filter is 256 bits. We hash the filehandle to 32bit and use the | |
580 | * low 3 bytes as hash-table indices. | |
581 | * | |
f54fe962 | 582 | * 'blocked_delegations_lock', which is always taken in block_delegations(), |
6282cd56 N |
583 | * is used to manage concurrent access. Testing does not need the lock |
584 | * except when swapping the two filters. | |
585 | */ | |
f54fe962 | 586 | static DEFINE_SPINLOCK(blocked_delegations_lock); |
6282cd56 N |
587 | static struct bloom_pair { |
588 | int entries, old_entries; | |
589 | time_t swap_time; | |
590 | int new; /* index into 'set' */ | |
591 | DECLARE_BITMAP(set[2], 256); | |
592 | } blocked_delegations; | |
593 | ||
594 | static int delegation_blocked(struct knfsd_fh *fh) | |
595 | { | |
596 | u32 hash; | |
597 | struct bloom_pair *bd = &blocked_delegations; | |
598 | ||
599 | if (bd->entries == 0) | |
600 | return 0; | |
601 | if (seconds_since_boot() - bd->swap_time > 30) { | |
f54fe962 | 602 | spin_lock(&blocked_delegations_lock); |
6282cd56 N |
603 | if (seconds_since_boot() - bd->swap_time > 30) { |
604 | bd->entries -= bd->old_entries; | |
605 | bd->old_entries = bd->entries; | |
606 | memset(bd->set[bd->new], 0, | |
607 | sizeof(bd->set[0])); | |
608 | bd->new = 1-bd->new; | |
609 | bd->swap_time = seconds_since_boot(); | |
610 | } | |
f54fe962 | 611 | spin_unlock(&blocked_delegations_lock); |
6282cd56 N |
612 | } |
613 | hash = arch_fast_hash(&fh->fh_base, fh->fh_size, 0); | |
614 | if (test_bit(hash&255, bd->set[0]) && | |
615 | test_bit((hash>>8)&255, bd->set[0]) && | |
616 | test_bit((hash>>16)&255, bd->set[0])) | |
617 | return 1; | |
618 | ||
619 | if (test_bit(hash&255, bd->set[1]) && | |
620 | test_bit((hash>>8)&255, bd->set[1]) && | |
621 | test_bit((hash>>16)&255, bd->set[1])) | |
622 | return 1; | |
623 | ||
624 | return 0; | |
625 | } | |
626 | ||
627 | static void block_delegations(struct knfsd_fh *fh) | |
628 | { | |
629 | u32 hash; | |
630 | struct bloom_pair *bd = &blocked_delegations; | |
631 | ||
632 | hash = arch_fast_hash(&fh->fh_base, fh->fh_size, 0); | |
633 | ||
f54fe962 | 634 | spin_lock(&blocked_delegations_lock); |
6282cd56 N |
635 | __set_bit(hash&255, bd->set[bd->new]); |
636 | __set_bit((hash>>8)&255, bd->set[bd->new]); | |
637 | __set_bit((hash>>16)&255, bd->set[bd->new]); | |
638 | if (bd->entries == 0) | |
639 | bd->swap_time = seconds_since_boot(); | |
640 | bd->entries += 1; | |
f54fe962 | 641 | spin_unlock(&blocked_delegations_lock); |
6282cd56 N |
642 | } |
643 | ||
1da177e4 | 644 | static struct nfs4_delegation * |
f9416e28 | 645 | alloc_init_deleg(struct nfs4_client *clp, struct svc_fh *current_fh) |
1da177e4 LT |
646 | { |
647 | struct nfs4_delegation *dp; | |
02a3508d | 648 | long n; |
1da177e4 LT |
649 | |
650 | dprintk("NFSD alloc_init_deleg\n"); | |
02a3508d TM |
651 | n = atomic_long_inc_return(&num_delegations); |
652 | if (n < 0 || n > max_delegations) | |
653 | goto out_dec; | |
6282cd56 | 654 | if (delegation_blocked(¤t_fh->fh_handle)) |
02a3508d | 655 | goto out_dec; |
996e0938 | 656 | dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab)); |
5b2d21c1 | 657 | if (dp == NULL) |
02a3508d | 658 | goto out_dec; |
6011695d TM |
659 | |
660 | dp->dl_stid.sc_free = nfs4_free_deleg; | |
2a74aba7 BF |
661 | /* |
662 | * delegation seqid's are never incremented. The 4.1 special | |
6136d2b4 BF |
663 | * meaning of seqid 0 isn't meaningful, really, but let's avoid |
664 | * 0 anyway just for consistency and use 1: | |
2a74aba7 BF |
665 | */ |
666 | dp->dl_stid.sc_stateid.si_generation = 1; | |
ea1da636 N |
667 | INIT_LIST_HEAD(&dp->dl_perfile); |
668 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 | 669 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
99c41515 | 670 | dp->dl_type = NFS4_OPEN_DELEGATE_READ; |
02e1215f | 671 | INIT_WORK(&dp->dl_recall.cb_work, nfsd4_run_cb_recall); |
1da177e4 | 672 | return dp; |
02a3508d TM |
673 | out_dec: |
674 | atomic_long_dec(&num_delegations); | |
675 | return NULL; | |
1da177e4 LT |
676 | } |
677 | ||
678 | void | |
6011695d | 679 | nfs4_put_stid(struct nfs4_stid *s) |
1da177e4 | 680 | { |
11b9164a | 681 | struct nfs4_file *fp = s->sc_file; |
6011695d TM |
682 | struct nfs4_client *clp = s->sc_client; |
683 | ||
4770d722 JL |
684 | might_lock(&clp->cl_lock); |
685 | ||
b401be22 JL |
686 | if (!atomic_dec_and_lock(&s->sc_count, &clp->cl_lock)) { |
687 | wake_up_all(&close_wq); | |
6011695d | 688 | return; |
b401be22 | 689 | } |
6011695d | 690 | idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id); |
4770d722 | 691 | spin_unlock(&clp->cl_lock); |
6011695d | 692 | s->sc_free(s); |
11b9164a TM |
693 | if (fp) |
694 | put_nfs4_file(fp); | |
1da177e4 LT |
695 | } |
696 | ||
acfdf5c3 | 697 | static void nfs4_put_deleg_lease(struct nfs4_file *fp) |
1da177e4 | 698 | { |
417c6629 JL |
699 | lockdep_assert_held(&state_lock); |
700 | ||
cbf7a75b BF |
701 | if (!fp->fi_lease) |
702 | return; | |
acfdf5c3 BF |
703 | if (atomic_dec_and_test(&fp->fi_delegees)) { |
704 | vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); | |
705 | fp->fi_lease = NULL; | |
4ee63624 | 706 | fput(fp->fi_deleg_file); |
acfdf5c3 BF |
707 | fp->fi_deleg_file = NULL; |
708 | } | |
1da177e4 LT |
709 | } |
710 | ||
6136d2b4 BF |
711 | static void unhash_stid(struct nfs4_stid *s) |
712 | { | |
3abdb607 | 713 | s->sc_type = 0; |
6136d2b4 BF |
714 | } |
715 | ||
931ee56c BH |
716 | static void |
717 | hash_delegation_locked(struct nfs4_delegation *dp, struct nfs4_file *fp) | |
718 | { | |
cdc97505 | 719 | lockdep_assert_held(&state_lock); |
417c6629 | 720 | lockdep_assert_held(&fp->fi_lock); |
931ee56c | 721 | |
67cb1279 | 722 | atomic_inc(&dp->dl_stid.sc_count); |
3fb87d13 | 723 | dp->dl_stid.sc_type = NFS4_DELEG_STID; |
931ee56c BH |
724 | list_add(&dp->dl_perfile, &fp->fi_delegations); |
725 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); | |
726 | } | |
727 | ||
1da177e4 | 728 | static void |
42690676 | 729 | unhash_delegation_locked(struct nfs4_delegation *dp) |
1da177e4 | 730 | { |
11b9164a | 731 | struct nfs4_file *fp = dp->dl_stid.sc_file; |
02e1215f | 732 | |
42690676 JL |
733 | lockdep_assert_held(&state_lock); |
734 | ||
b0fc29d6 | 735 | dp->dl_stid.sc_type = NFS4_CLOSED_DELEG_STID; |
d55a166c JL |
736 | /* Ensure that deleg break won't try to requeue it */ |
737 | ++dp->dl_time; | |
417c6629 | 738 | spin_lock(&fp->fi_lock); |
931ee56c | 739 | list_del_init(&dp->dl_perclnt); |
1da177e4 | 740 | list_del_init(&dp->dl_recall_lru); |
02e1215f JL |
741 | list_del_init(&dp->dl_perfile); |
742 | spin_unlock(&fp->fi_lock); | |
f8338834 | 743 | if (fp) |
02e1215f | 744 | nfs4_put_deleg_lease(fp); |
3bd64a5b BF |
745 | } |
746 | ||
3bd64a5b BF |
747 | static void destroy_delegation(struct nfs4_delegation *dp) |
748 | { | |
42690676 JL |
749 | spin_lock(&state_lock); |
750 | unhash_delegation_locked(dp); | |
751 | spin_unlock(&state_lock); | |
6011695d | 752 | nfs4_put_stid(&dp->dl_stid); |
3bd64a5b BF |
753 | } |
754 | ||
755 | static void revoke_delegation(struct nfs4_delegation *dp) | |
756 | { | |
757 | struct nfs4_client *clp = dp->dl_stid.sc_client; | |
758 | ||
2d4a532d JL |
759 | WARN_ON(!list_empty(&dp->dl_recall_lru)); |
760 | ||
3bd64a5b | 761 | if (clp->cl_minorversion == 0) |
6011695d | 762 | nfs4_put_stid(&dp->dl_stid); |
3bd64a5b | 763 | else { |
3bd64a5b | 764 | dp->dl_stid.sc_type = NFS4_REVOKED_DELEG_STID; |
2d4a532d JL |
765 | spin_lock(&clp->cl_lock); |
766 | list_add(&dp->dl_recall_lru, &clp->cl_revoked); | |
767 | spin_unlock(&clp->cl_lock); | |
3bd64a5b BF |
768 | } |
769 | } | |
770 | ||
1da177e4 LT |
771 | /* |
772 | * SETCLIENTID state | |
773 | */ | |
774 | ||
ddc04c41 BF |
775 | static unsigned int clientid_hashval(u32 id) |
776 | { | |
777 | return id & CLIENT_HASH_MASK; | |
778 | } | |
779 | ||
780 | static unsigned int clientstr_hashval(const char *name) | |
781 | { | |
782 | return opaque_hashval(name, 8) & CLIENT_HASH_MASK; | |
783 | } | |
784 | ||
f9d7562f BF |
785 | /* |
786 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
787 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
788 | * only what share bits are currently in force, but also what | |
789 | * combinations of share bits previous opens have used. This allows us | |
790 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
791 | * return an error if the client attempt to downgrade to a combination | |
792 | * of share bits not explicable by closing some of its previous opens. | |
793 | * | |
794 | * XXX: This enforcement is actually incomplete, since we don't keep | |
795 | * track of access/deny bit combinations; so, e.g., we allow: | |
796 | * | |
797 | * OPEN allow read, deny write | |
798 | * OPEN allow both, deny none | |
799 | * DOWNGRADE allow read, deny none | |
800 | * | |
801 | * which we should reject. | |
802 | */ | |
5ae037e5 JL |
803 | static unsigned int |
804 | bmap_to_share_mode(unsigned long bmap) { | |
f9d7562f | 805 | int i; |
5ae037e5 | 806 | unsigned int access = 0; |
f9d7562f | 807 | |
f9d7562f BF |
808 | for (i = 1; i < 4; i++) { |
809 | if (test_bit(i, &bmap)) | |
5ae037e5 | 810 | access |= i; |
f9d7562f | 811 | } |
5ae037e5 | 812 | return access; |
f9d7562f BF |
813 | } |
814 | ||
82c5ff1b JL |
815 | /* set share access for a given stateid */ |
816 | static inline void | |
817 | set_access(u32 access, struct nfs4_ol_stateid *stp) | |
818 | { | |
c11c591f JL |
819 | unsigned char mask = 1 << access; |
820 | ||
821 | WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH); | |
822 | stp->st_access_bmap |= mask; | |
82c5ff1b JL |
823 | } |
824 | ||
825 | /* clear share access for a given stateid */ | |
826 | static inline void | |
827 | clear_access(u32 access, struct nfs4_ol_stateid *stp) | |
828 | { | |
c11c591f JL |
829 | unsigned char mask = 1 << access; |
830 | ||
831 | WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH); | |
832 | stp->st_access_bmap &= ~mask; | |
82c5ff1b JL |
833 | } |
834 | ||
835 | /* test whether a given stateid has access */ | |
836 | static inline bool | |
837 | test_access(u32 access, struct nfs4_ol_stateid *stp) | |
838 | { | |
c11c591f JL |
839 | unsigned char mask = 1 << access; |
840 | ||
841 | return (bool)(stp->st_access_bmap & mask); | |
82c5ff1b JL |
842 | } |
843 | ||
ce0fc43c JL |
844 | /* set share deny for a given stateid */ |
845 | static inline void | |
c11c591f | 846 | set_deny(u32 deny, struct nfs4_ol_stateid *stp) |
ce0fc43c | 847 | { |
c11c591f JL |
848 | unsigned char mask = 1 << deny; |
849 | ||
850 | WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH); | |
851 | stp->st_deny_bmap |= mask; | |
ce0fc43c JL |
852 | } |
853 | ||
854 | /* clear share deny for a given stateid */ | |
855 | static inline void | |
c11c591f | 856 | clear_deny(u32 deny, struct nfs4_ol_stateid *stp) |
ce0fc43c | 857 | { |
c11c591f JL |
858 | unsigned char mask = 1 << deny; |
859 | ||
860 | WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH); | |
861 | stp->st_deny_bmap &= ~mask; | |
ce0fc43c JL |
862 | } |
863 | ||
864 | /* test whether a given stateid is denying specific access */ | |
865 | static inline bool | |
c11c591f | 866 | test_deny(u32 deny, struct nfs4_ol_stateid *stp) |
ce0fc43c | 867 | { |
c11c591f JL |
868 | unsigned char mask = 1 << deny; |
869 | ||
870 | return (bool)(stp->st_deny_bmap & mask); | |
f9d7562f BF |
871 | } |
872 | ||
873 | static int nfs4_access_to_omode(u32 access) | |
874 | { | |
8f34a430 | 875 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
876 | case NFS4_SHARE_ACCESS_READ: |
877 | return O_RDONLY; | |
878 | case NFS4_SHARE_ACCESS_WRITE: | |
879 | return O_WRONLY; | |
880 | case NFS4_SHARE_ACCESS_BOTH: | |
881 | return O_RDWR; | |
882 | } | |
063b0fb9 BF |
883 | WARN_ON_ONCE(1); |
884 | return O_RDONLY; | |
f9d7562f BF |
885 | } |
886 | ||
baeb4ff0 JL |
887 | /* |
888 | * A stateid that had a deny mode associated with it is being released | |
889 | * or downgraded. Recalculate the deny mode on the file. | |
890 | */ | |
891 | static void | |
892 | recalculate_deny_mode(struct nfs4_file *fp) | |
893 | { | |
894 | struct nfs4_ol_stateid *stp; | |
895 | ||
896 | spin_lock(&fp->fi_lock); | |
897 | fp->fi_share_deny = 0; | |
898 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) | |
899 | fp->fi_share_deny |= bmap_to_share_mode(stp->st_deny_bmap); | |
900 | spin_unlock(&fp->fi_lock); | |
901 | } | |
902 | ||
903 | static void | |
904 | reset_union_bmap_deny(u32 deny, struct nfs4_ol_stateid *stp) | |
905 | { | |
906 | int i; | |
907 | bool change = false; | |
908 | ||
909 | for (i = 1; i < 4; i++) { | |
910 | if ((i & deny) != i) { | |
911 | change = true; | |
912 | clear_deny(i, stp); | |
913 | } | |
914 | } | |
915 | ||
916 | /* Recalculate per-file deny mode if there was a change */ | |
917 | if (change) | |
11b9164a | 918 | recalculate_deny_mode(stp->st_stid.sc_file); |
baeb4ff0 JL |
919 | } |
920 | ||
82c5ff1b JL |
921 | /* release all access and file references for a given stateid */ |
922 | static void | |
923 | release_all_access(struct nfs4_ol_stateid *stp) | |
924 | { | |
925 | int i; | |
11b9164a | 926 | struct nfs4_file *fp = stp->st_stid.sc_file; |
baeb4ff0 JL |
927 | |
928 | if (fp && stp->st_deny_bmap != 0) | |
929 | recalculate_deny_mode(fp); | |
82c5ff1b JL |
930 | |
931 | for (i = 1; i < 4; i++) { | |
932 | if (test_access(i, stp)) | |
11b9164a | 933 | nfs4_file_put_access(stp->st_stid.sc_file, i); |
82c5ff1b JL |
934 | clear_access(i, stp); |
935 | } | |
936 | } | |
937 | ||
6b180f0b JL |
938 | static void nfs4_put_stateowner(struct nfs4_stateowner *sop) |
939 | { | |
a819ecc1 JL |
940 | struct nfs4_client *clp = sop->so_client; |
941 | ||
942 | might_lock(&clp->cl_lock); | |
943 | ||
944 | if (!atomic_dec_and_lock(&sop->so_count, &clp->cl_lock)) | |
6b180f0b | 945 | return; |
8f4b54c5 | 946 | sop->so_ops->so_unhash(sop); |
a819ecc1 | 947 | spin_unlock(&clp->cl_lock); |
6b180f0b JL |
948 | kfree(sop->so_owner.data); |
949 | sop->so_ops->so_free(sop); | |
950 | } | |
951 | ||
dcef0413 | 952 | static void unhash_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 953 | { |
11b9164a | 954 | struct nfs4_file *fp = stp->st_stid.sc_file; |
1d31a253 | 955 | |
1c755dc1 JL |
956 | lockdep_assert_held(&stp->st_stateowner->so_client->cl_lock); |
957 | ||
1d31a253 | 958 | spin_lock(&fp->fi_lock); |
529d7b2a | 959 | list_del(&stp->st_perfile); |
1d31a253 | 960 | spin_unlock(&fp->fi_lock); |
529d7b2a BF |
961 | list_del(&stp->st_perstateowner); |
962 | } | |
963 | ||
6011695d | 964 | static void nfs4_free_ol_stateid(struct nfs4_stid *stid) |
529d7b2a | 965 | { |
6011695d | 966 | struct nfs4_ol_stateid *stp = openlockstateid(stid); |
4665e2ba | 967 | |
6011695d | 968 | release_all_access(stp); |
d3134b10 JL |
969 | if (stp->st_stateowner) |
970 | nfs4_put_stateowner(stp->st_stateowner); | |
6011695d | 971 | kmem_cache_free(stateid_slab, stid); |
529d7b2a BF |
972 | } |
973 | ||
b49e084d | 974 | static void nfs4_free_lock_stateid(struct nfs4_stid *stid) |
529d7b2a | 975 | { |
b49e084d JL |
976 | struct nfs4_ol_stateid *stp = openlockstateid(stid); |
977 | struct nfs4_lockowner *lo = lockowner(stp->st_stateowner); | |
529d7b2a BF |
978 | struct file *file; |
979 | ||
b49e084d JL |
980 | file = find_any_file(stp->st_stid.sc_file); |
981 | if (file) | |
982 | filp_close(file, (fl_owner_t)lo); | |
983 | nfs4_free_ol_stateid(stid); | |
984 | } | |
985 | ||
5adfd885 | 986 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) |
b49e084d | 987 | { |
1c755dc1 JL |
988 | struct nfs4_openowner *oo = openowner(stp->st_openstp->st_stateowner); |
989 | ||
990 | spin_lock(&oo->oo_owner.so_client->cl_lock); | |
3c87b9b7 | 991 | list_del(&stp->st_locks); |
529d7b2a | 992 | unhash_generic_stateid(stp); |
6136d2b4 | 993 | unhash_stid(&stp->st_stid); |
1c755dc1 | 994 | spin_unlock(&oo->oo_owner.so_client->cl_lock); |
6011695d | 995 | nfs4_put_stid(&stp->st_stid); |
529d7b2a BF |
996 | } |
997 | ||
c58c6610 | 998 | static void unhash_lockowner_locked(struct nfs4_lockowner *lo) |
8f4b54c5 | 999 | { |
d4f0489f | 1000 | struct nfs4_client *clp = lo->lo_owner.so_client; |
c58c6610 | 1001 | |
d4f0489f | 1002 | lockdep_assert_held(&clp->cl_lock); |
c58c6610 | 1003 | |
8f4b54c5 JL |
1004 | list_del_init(&lo->lo_owner.so_strhash); |
1005 | } | |
1006 | ||
1007 | static void release_lockowner_stateids(struct nfs4_lockowner *lo) | |
529d7b2a | 1008 | { |
d4f0489f | 1009 | struct nfs4_client *clp = lo->lo_owner.so_client; |
dcef0413 | 1010 | struct nfs4_ol_stateid *stp; |
529d7b2a | 1011 | |
d4f0489f | 1012 | lockdep_assert_held(&clp->cl_lock); |
c58c6610 | 1013 | |
fe0750e5 BF |
1014 | while (!list_empty(&lo->lo_owner.so_stateids)) { |
1015 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
dcef0413 | 1016 | struct nfs4_ol_stateid, st_perstateowner); |
d4f0489f | 1017 | spin_unlock(&clp->cl_lock); |
5adfd885 | 1018 | release_lock_stateid(stp); |
d4f0489f | 1019 | spin_lock(&clp->cl_lock); |
529d7b2a BF |
1020 | } |
1021 | } | |
1022 | ||
fe0750e5 | 1023 | static void release_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 1024 | { |
d4f0489f | 1025 | struct nfs4_client *clp = lo->lo_owner.so_client; |
c58c6610 | 1026 | |
d4f0489f | 1027 | spin_lock(&clp->cl_lock); |
c58c6610 | 1028 | unhash_lockowner_locked(lo); |
8f4b54c5 | 1029 | release_lockowner_stateids(lo); |
d4f0489f | 1030 | spin_unlock(&clp->cl_lock); |
6b180f0b | 1031 | nfs4_put_stateowner(&lo->lo_owner); |
529d7b2a BF |
1032 | } |
1033 | ||
3c87b9b7 | 1034 | static void release_open_stateid_locks(struct nfs4_ol_stateid *open_stp) |
1c755dc1 JL |
1035 | __releases(&open_stp->st_stateowner->so_client->cl_lock) |
1036 | __acquires(&open_stp->st_stateowner->so_client->cl_lock) | |
3c87b9b7 TM |
1037 | { |
1038 | struct nfs4_ol_stateid *stp; | |
1039 | ||
1040 | while (!list_empty(&open_stp->st_locks)) { | |
1041 | stp = list_entry(open_stp->st_locks.next, | |
1042 | struct nfs4_ol_stateid, st_locks); | |
1c755dc1 | 1043 | spin_unlock(&open_stp->st_stateowner->so_client->cl_lock); |
3c87b9b7 | 1044 | release_lock_stateid(stp); |
1c755dc1 | 1045 | spin_lock(&open_stp->st_stateowner->so_client->cl_lock); |
529d7b2a BF |
1046 | } |
1047 | } | |
1048 | ||
38c387b5 | 1049 | static void unhash_open_stateid(struct nfs4_ol_stateid *stp) |
2283963f | 1050 | { |
1c755dc1 | 1051 | spin_lock(&stp->st_stateowner->so_client->cl_lock); |
2283963f | 1052 | unhash_generic_stateid(stp); |
3c87b9b7 | 1053 | release_open_stateid_locks(stp); |
1c755dc1 | 1054 | spin_unlock(&stp->st_stateowner->so_client->cl_lock); |
38c387b5 BF |
1055 | } |
1056 | ||
1057 | static void release_open_stateid(struct nfs4_ol_stateid *stp) | |
1058 | { | |
1059 | unhash_open_stateid(stp); | |
6011695d | 1060 | nfs4_put_stid(&stp->st_stid); |
2283963f BF |
1061 | } |
1062 | ||
7ffb5880 | 1063 | static void unhash_openowner_locked(struct nfs4_openowner *oo) |
f1d110ca | 1064 | { |
d4f0489f | 1065 | struct nfs4_client *clp = oo->oo_owner.so_client; |
7ffb5880 | 1066 | |
d4f0489f | 1067 | lockdep_assert_held(&clp->cl_lock); |
7ffb5880 | 1068 | |
8f4b54c5 JL |
1069 | list_del_init(&oo->oo_owner.so_strhash); |
1070 | list_del_init(&oo->oo_perclient); | |
f1d110ca BF |
1071 | } |
1072 | ||
f7a4d872 BF |
1073 | static void release_last_closed_stateid(struct nfs4_openowner *oo) |
1074 | { | |
1075 | struct nfs4_ol_stateid *s = oo->oo_last_closed_stid; | |
1076 | ||
1077 | if (s) { | |
d3134b10 | 1078 | list_del_init(&oo->oo_close_lru); |
f7a4d872 | 1079 | oo->oo_last_closed_stid = NULL; |
d3134b10 | 1080 | nfs4_put_stid(&s->st_stid); |
f7a4d872 BF |
1081 | } |
1082 | } | |
1083 | ||
8f4b54c5 JL |
1084 | static void release_openowner_stateids(struct nfs4_openowner *oo) |
1085 | { | |
1086 | struct nfs4_ol_stateid *stp; | |
d4f0489f | 1087 | struct nfs4_client *clp = oo->oo_owner.so_client; |
7ffb5880 | 1088 | |
d4f0489f | 1089 | lockdep_assert_held(&clp->cl_lock); |
8f4b54c5 JL |
1090 | |
1091 | while (!list_empty(&oo->oo_owner.so_stateids)) { | |
1092 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
1093 | struct nfs4_ol_stateid, st_perstateowner); | |
d4f0489f | 1094 | spin_unlock(&clp->cl_lock); |
8f4b54c5 | 1095 | release_open_stateid(stp); |
d4f0489f | 1096 | spin_lock(&clp->cl_lock); |
8f4b54c5 JL |
1097 | } |
1098 | } | |
1099 | ||
fe0750e5 | 1100 | static void release_openowner(struct nfs4_openowner *oo) |
f1d110ca | 1101 | { |
d4f0489f | 1102 | struct nfs4_client *clp = oo->oo_owner.so_client; |
7ffb5880 | 1103 | |
d4f0489f | 1104 | spin_lock(&clp->cl_lock); |
7ffb5880 | 1105 | unhash_openowner_locked(oo); |
8f4b54c5 | 1106 | release_openowner_stateids(oo); |
d4f0489f | 1107 | spin_unlock(&clp->cl_lock); |
f7a4d872 | 1108 | release_last_closed_stateid(oo); |
6b180f0b | 1109 | nfs4_put_stateowner(&oo->oo_owner); |
f1d110ca BF |
1110 | } |
1111 | ||
5282fd72 ME |
1112 | static inline int |
1113 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
1114 | { | |
1115 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
1116 | ||
1117 | return sid->sequence % SESSION_HASH_SIZE; | |
1118 | } | |
1119 | ||
8f199b82 | 1120 | #ifdef NFSD_DEBUG |
5282fd72 ME |
1121 | static inline void |
1122 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
1123 | { | |
1124 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
1125 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
1126 | } | |
8f199b82 TM |
1127 | #else |
1128 | static inline void | |
1129 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
1130 | { | |
1131 | } | |
1132 | #endif | |
1133 | ||
9411b1d4 BF |
1134 | /* |
1135 | * Bump the seqid on cstate->replay_owner, and clear replay_owner if it | |
1136 | * won't be used for replay. | |
1137 | */ | |
1138 | void nfsd4_bump_seqid(struct nfsd4_compound_state *cstate, __be32 nfserr) | |
1139 | { | |
1140 | struct nfs4_stateowner *so = cstate->replay_owner; | |
1141 | ||
1142 | if (nfserr == nfserr_replay_me) | |
1143 | return; | |
1144 | ||
1145 | if (!seqid_mutating_err(ntohl(nfserr))) { | |
58fb12e6 | 1146 | nfsd4_cstate_clear_replay(cstate); |
9411b1d4 BF |
1147 | return; |
1148 | } | |
1149 | if (!so) | |
1150 | return; | |
1151 | if (so->so_is_open_owner) | |
1152 | release_last_closed_stateid(openowner(so)); | |
1153 | so->so_seqid++; | |
1154 | return; | |
1155 | } | |
5282fd72 | 1156 | |
ec6b5d7b AA |
1157 | static void |
1158 | gen_sessionid(struct nfsd4_session *ses) | |
1159 | { | |
1160 | struct nfs4_client *clp = ses->se_client; | |
1161 | struct nfsd4_sessionid *sid; | |
1162 | ||
1163 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
1164 | sid->clientid = clp->cl_clientid; | |
1165 | sid->sequence = current_sessionid++; | |
1166 | sid->reserved = 0; | |
1167 | } | |
1168 | ||
1169 | /* | |
a649637c AA |
1170 | * The protocol defines ca_maxresponssize_cached to include the size of |
1171 | * the rpc header, but all we need to cache is the data starting after | |
1172 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
1173 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
1174 | * value that is the number of bytes in our cache plus a few additional | |
1175 | * bytes. In order to stay on the safe side, and not promise more than | |
1176 | * we can cache, those additional bytes must be the minimum possible: 24 | |
1177 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
1178 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
1179 | * for the SEQUENCE op response: | |
1180 | */ | |
1181 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
1182 | ||
557ce264 AA |
1183 | static void |
1184 | free_session_slots(struct nfsd4_session *ses) | |
1185 | { | |
1186 | int i; | |
1187 | ||
1188 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
1189 | kfree(ses->se_slots[i]); | |
1190 | } | |
1191 | ||
a649637c | 1192 | /* |
efe0cb6d BF |
1193 | * We don't actually need to cache the rpc and session headers, so we |
1194 | * can allocate a little less for each slot: | |
1195 | */ | |
55c760cf | 1196 | static inline u32 slot_bytes(struct nfsd4_channel_attrs *ca) |
efe0cb6d | 1197 | { |
55c760cf | 1198 | u32 size; |
efe0cb6d | 1199 | |
55c760cf BF |
1200 | if (ca->maxresp_cached < NFSD_MIN_HDR_SEQ_SZ) |
1201 | size = 0; | |
1202 | else | |
1203 | size = ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
1204 | return size + sizeof(struct nfsd4_slot); | |
5b6feee9 | 1205 | } |
ec6b5d7b | 1206 | |
5b6feee9 BF |
1207 | /* |
1208 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c | 1209 | * re-negotiate active sessions and reduce their slot usage to make |
42b2aa86 | 1210 | * room for new connections. For now we just fail the create session. |
ec6b5d7b | 1211 | */ |
55c760cf | 1212 | static u32 nfsd4_get_drc_mem(struct nfsd4_channel_attrs *ca) |
ec6b5d7b | 1213 | { |
55c760cf BF |
1214 | u32 slotsize = slot_bytes(ca); |
1215 | u32 num = ca->maxreqs; | |
5b6feee9 | 1216 | int avail; |
ec6b5d7b | 1217 | |
5b6feee9 | 1218 | spin_lock(&nfsd_drc_lock); |
697ce9be ZY |
1219 | avail = min((unsigned long)NFSD_MAX_MEM_PER_SESSION, |
1220 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
5b6feee9 BF |
1221 | num = min_t(int, num, avail / slotsize); |
1222 | nfsd_drc_mem_used += num * slotsize; | |
1223 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 1224 | |
5b6feee9 BF |
1225 | return num; |
1226 | } | |
ec6b5d7b | 1227 | |
55c760cf | 1228 | static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs *ca) |
5b6feee9 | 1229 | { |
55c760cf BF |
1230 | int slotsize = slot_bytes(ca); |
1231 | ||
4bd9b0f4 | 1232 | spin_lock(&nfsd_drc_lock); |
55c760cf | 1233 | nfsd_drc_mem_used -= slotsize * ca->maxreqs; |
4bd9b0f4 | 1234 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 1235 | } |
ec6b5d7b | 1236 | |
60810e54 KM |
1237 | static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fattrs, |
1238 | struct nfsd4_channel_attrs *battrs) | |
5b6feee9 | 1239 | { |
60810e54 KM |
1240 | int numslots = fattrs->maxreqs; |
1241 | int slotsize = slot_bytes(fattrs); | |
5b6feee9 BF |
1242 | struct nfsd4_session *new; |
1243 | int mem, i; | |
a649637c | 1244 | |
5b6feee9 BF |
1245 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
1246 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
1247 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 1248 | |
5b6feee9 BF |
1249 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
1250 | if (!new) | |
1251 | return NULL; | |
557ce264 | 1252 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 | 1253 | for (i = 0; i < numslots; i++) { |
55c760cf | 1254 | new->se_slots[i] = kzalloc(slotsize, GFP_KERNEL); |
5b6feee9 | 1255 | if (!new->se_slots[i]) |
557ce264 | 1256 | goto out_free; |
557ce264 | 1257 | } |
60810e54 KM |
1258 | |
1259 | memcpy(&new->se_fchannel, fattrs, sizeof(struct nfsd4_channel_attrs)); | |
1260 | memcpy(&new->se_bchannel, battrs, sizeof(struct nfsd4_channel_attrs)); | |
1261 | ||
5b6feee9 BF |
1262 | return new; |
1263 | out_free: | |
1264 | while (i--) | |
1265 | kfree(new->se_slots[i]); | |
1266 | kfree(new); | |
1267 | return NULL; | |
ec6b5d7b AA |
1268 | } |
1269 | ||
19cf5c02 BF |
1270 | static void free_conn(struct nfsd4_conn *c) |
1271 | { | |
1272 | svc_xprt_put(c->cn_xprt); | |
1273 | kfree(c); | |
1274 | } | |
ec6b5d7b | 1275 | |
19cf5c02 BF |
1276 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
1277 | { | |
1278 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
1279 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 1280 | |
19cf5c02 BF |
1281 | spin_lock(&clp->cl_lock); |
1282 | if (!list_empty(&c->cn_persession)) { | |
1283 | list_del(&c->cn_persession); | |
1284 | free_conn(c); | |
1285 | } | |
eea49806 | 1286 | nfsd4_probe_callback(clp); |
2e4b7239 | 1287 | spin_unlock(&clp->cl_lock); |
19cf5c02 | 1288 | } |
ec6b5d7b | 1289 | |
d29c374c | 1290 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 1291 | { |
c7662518 | 1292 | struct nfsd4_conn *conn; |
ec6b5d7b | 1293 | |
c7662518 BF |
1294 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
1295 | if (!conn) | |
db90681d | 1296 | return NULL; |
c7662518 BF |
1297 | svc_xprt_get(rqstp->rq_xprt); |
1298 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 1299 | conn->cn_flags = flags; |
db90681d BF |
1300 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
1301 | return conn; | |
1302 | } | |
a649637c | 1303 | |
328ead28 BF |
1304 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
1305 | { | |
1306 | conn->cn_session = ses; | |
1307 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
1308 | } |
1309 | ||
db90681d | 1310 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 1311 | { |
db90681d | 1312 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 1313 | |
c7662518 | 1314 | spin_lock(&clp->cl_lock); |
328ead28 | 1315 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 1316 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
1317 | } |
1318 | ||
21b75b01 | 1319 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 1320 | { |
19cf5c02 | 1321 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 1322 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
1323 | } |
1324 | ||
e1ff371f | 1325 | static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses) |
ec6b5d7b | 1326 | { |
21b75b01 | 1327 | int ret; |
ec6b5d7b | 1328 | |
db90681d | 1329 | nfsd4_hash_conn(conn, ses); |
21b75b01 BF |
1330 | ret = nfsd4_register_conn(conn); |
1331 | if (ret) | |
1332 | /* oops; xprt is already down: */ | |
1333 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
57a37144 BF |
1334 | /* We may have gained or lost a callback channel: */ |
1335 | nfsd4_probe_callback_sync(ses->se_client); | |
c7662518 | 1336 | } |
ec6b5d7b | 1337 | |
e1ff371f | 1338 | static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses) |
1d1bc8f2 BF |
1339 | { |
1340 | u32 dir = NFS4_CDFC4_FORE; | |
1341 | ||
e1ff371f | 1342 | if (cses->flags & SESSION4_BACK_CHAN) |
1d1bc8f2 | 1343 | dir |= NFS4_CDFC4_BACK; |
e1ff371f | 1344 | return alloc_conn(rqstp, dir); |
1d1bc8f2 BF |
1345 | } |
1346 | ||
1347 | /* must be called under client_lock */ | |
19cf5c02 | 1348 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 1349 | { |
19cf5c02 BF |
1350 | struct nfs4_client *clp = s->se_client; |
1351 | struct nfsd4_conn *c; | |
ec6b5d7b | 1352 | |
19cf5c02 BF |
1353 | spin_lock(&clp->cl_lock); |
1354 | while (!list_empty(&s->se_conns)) { | |
1355 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
1356 | list_del_init(&c->cn_persession); | |
1357 | spin_unlock(&clp->cl_lock); | |
557ce264 | 1358 | |
19cf5c02 BF |
1359 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
1360 | free_conn(c); | |
ec6b5d7b | 1361 | |
19cf5c02 BF |
1362 | spin_lock(&clp->cl_lock); |
1363 | } | |
1364 | spin_unlock(&clp->cl_lock); | |
c7662518 | 1365 | } |
ec6b5d7b | 1366 | |
1377b69e BF |
1367 | static void __free_session(struct nfsd4_session *ses) |
1368 | { | |
1377b69e BF |
1369 | free_session_slots(ses); |
1370 | kfree(ses); | |
1371 | } | |
1372 | ||
66b2b9b2 | 1373 | static void free_session(struct nfsd4_session *ses) |
c7662518 | 1374 | { |
66b2b9b2 | 1375 | struct nfsd_net *nn = net_generic(ses->se_client->net, nfsd_net_id); |
c9a49628 SK |
1376 | |
1377 | lockdep_assert_held(&nn->client_lock); | |
19cf5c02 | 1378 | nfsd4_del_conns(ses); |
55c760cf | 1379 | nfsd4_put_drc_mem(&ses->se_fchannel); |
1377b69e | 1380 | __free_session(ses); |
c7662518 BF |
1381 | } |
1382 | ||
135ae827 | 1383 | static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
a827bcb2 | 1384 | { |
a827bcb2 | 1385 | int idx; |
1872de0e | 1386 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
a827bcb2 | 1387 | |
ec6b5d7b AA |
1388 | new->se_client = clp; |
1389 | gen_sessionid(new); | |
ec6b5d7b | 1390 | |
c7662518 BF |
1391 | INIT_LIST_HEAD(&new->se_conns); |
1392 | ||
ac7c46f2 | 1393 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 1394 | new->se_flags = cses->flags; |
8b5ce5cd | 1395 | new->se_cb_prog = cses->callback_prog; |
c6bb3ca2 | 1396 | new->se_cb_sec = cses->cb_sec; |
66b2b9b2 | 1397 | atomic_set(&new->se_ref, 0); |
5b6feee9 | 1398 | idx = hash_sessionid(&new->se_sessionid); |
c9a49628 | 1399 | spin_lock(&nn->client_lock); |
1872de0e | 1400 | list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]); |
4c649378 | 1401 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 1402 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 1403 | spin_unlock(&clp->cl_lock); |
c9a49628 | 1404 | spin_unlock(&nn->client_lock); |
60810e54 | 1405 | |
dcbeaa68 | 1406 | if (cses->flags & SESSION4_BACK_CHAN) { |
edd76786 | 1407 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
1408 | /* |
1409 | * This is a little silly; with sessions there's no real | |
1410 | * use for the callback address. Use the peer address | |
1411 | * as a reasonable default for now, but consider fixing | |
1412 | * the rpc client not to require an address in the | |
1413 | * future: | |
1414 | */ | |
edd76786 BF |
1415 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
1416 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 1417 | } |
ec6b5d7b AA |
1418 | } |
1419 | ||
9089f1b4 | 1420 | /* caller must hold client_lock */ |
5282fd72 | 1421 | static struct nfsd4_session * |
d4e19e70 | 1422 | __find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net) |
5282fd72 ME |
1423 | { |
1424 | struct nfsd4_session *elem; | |
1425 | int idx; | |
1872de0e | 1426 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
5282fd72 ME |
1427 | |
1428 | dump_sessionid(__func__, sessionid); | |
1429 | idx = hash_sessionid(sessionid); | |
5282fd72 | 1430 | /* Search in the appropriate list */ |
1872de0e | 1431 | list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) { |
5282fd72 ME |
1432 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
1433 | NFS4_MAX_SESSIONID_LEN)) { | |
1434 | return elem; | |
1435 | } | |
1436 | } | |
1437 | ||
1438 | dprintk("%s: session not found\n", __func__); | |
1439 | return NULL; | |
1440 | } | |
1441 | ||
d4e19e70 TM |
1442 | static struct nfsd4_session * |
1443 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net, | |
1444 | __be32 *ret) | |
1445 | { | |
1446 | struct nfsd4_session *session; | |
1447 | __be32 status = nfserr_badsession; | |
1448 | ||
1449 | session = __find_in_sessionid_hashtbl(sessionid, net); | |
1450 | if (!session) | |
1451 | goto out; | |
1452 | status = nfsd4_get_session_locked(session); | |
1453 | if (status) | |
1454 | session = NULL; | |
1455 | out: | |
1456 | *ret = status; | |
1457 | return session; | |
1458 | } | |
1459 | ||
9089f1b4 | 1460 | /* caller must hold client_lock */ |
7116ed6b | 1461 | static void |
5282fd72 | 1462 | unhash_session(struct nfsd4_session *ses) |
7116ed6b AA |
1463 | { |
1464 | list_del(&ses->se_hash); | |
4c649378 | 1465 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 1466 | list_del(&ses->se_perclnt); |
4c649378 | 1467 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
1468 | } |
1469 | ||
1da177e4 LT |
1470 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
1471 | static int | |
2c142baa | 1472 | STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn) |
1da177e4 | 1473 | { |
2c142baa | 1474 | if (clid->cl_boot == nn->boot_time) |
1da177e4 | 1475 | return 0; |
60adfc50 | 1476 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
2c142baa | 1477 | clid->cl_boot, clid->cl_id, nn->boot_time); |
1da177e4 LT |
1478 | return 1; |
1479 | } | |
1480 | ||
1481 | /* | |
1482 | * XXX Should we use a slab cache ? | |
1483 | * This type of memory management is somewhat inefficient, but we use it | |
1484 | * anyway since SETCLIENTID is not a common operation. | |
1485 | */ | |
35bba9a3 | 1486 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
1487 | { |
1488 | struct nfs4_client *clp; | |
d4f0489f | 1489 | int i; |
1da177e4 | 1490 | |
35bba9a3 BF |
1491 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
1492 | if (clp == NULL) | |
1493 | return NULL; | |
67114fe6 | 1494 | clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); |
d4f0489f TM |
1495 | if (clp->cl_name.data == NULL) |
1496 | goto err_no_name; | |
1497 | clp->cl_ownerstr_hashtbl = kmalloc(sizeof(struct list_head) * | |
1498 | OWNER_HASH_SIZE, GFP_KERNEL); | |
1499 | if (!clp->cl_ownerstr_hashtbl) | |
1500 | goto err_no_hashtbl; | |
1501 | for (i = 0; i < OWNER_HASH_SIZE; i++) | |
1502 | INIT_LIST_HEAD(&clp->cl_ownerstr_hashtbl[i]); | |
35bba9a3 | 1503 | clp->cl_name.len = name.len; |
5694c93e TM |
1504 | INIT_LIST_HEAD(&clp->cl_sessions); |
1505 | idr_init(&clp->cl_stateids); | |
1506 | atomic_set(&clp->cl_refcount, 0); | |
1507 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; | |
1508 | INIT_LIST_HEAD(&clp->cl_idhash); | |
1509 | INIT_LIST_HEAD(&clp->cl_openowners); | |
1510 | INIT_LIST_HEAD(&clp->cl_delegations); | |
1511 | INIT_LIST_HEAD(&clp->cl_lru); | |
1512 | INIT_LIST_HEAD(&clp->cl_callbacks); | |
1513 | INIT_LIST_HEAD(&clp->cl_revoked); | |
1514 | spin_lock_init(&clp->cl_lock); | |
1515 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1da177e4 | 1516 | return clp; |
d4f0489f TM |
1517 | err_no_hashtbl: |
1518 | kfree(clp->cl_name.data); | |
1519 | err_no_name: | |
1520 | kfree(clp); | |
1521 | return NULL; | |
1da177e4 LT |
1522 | } |
1523 | ||
4dd86e15 | 1524 | static void |
1da177e4 LT |
1525 | free_client(struct nfs4_client *clp) |
1526 | { | |
bca0ec65 | 1527 | struct nfsd_net __maybe_unused *nn = net_generic(clp->net, nfsd_net_id); |
c9a49628 SK |
1528 | |
1529 | lockdep_assert_held(&nn->client_lock); | |
792c95dd BF |
1530 | while (!list_empty(&clp->cl_sessions)) { |
1531 | struct nfsd4_session *ses; | |
1532 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
1533 | se_perclnt); | |
1534 | list_del(&ses->se_perclnt); | |
66b2b9b2 BF |
1535 | WARN_ON_ONCE(atomic_read(&ses->se_ref)); |
1536 | free_session(ses); | |
792c95dd | 1537 | } |
4cb57e30 | 1538 | rpc_destroy_wait_queue(&clp->cl_cb_waitq); |
03a4e1f6 | 1539 | free_svc_cred(&clp->cl_cred); |
d4f0489f | 1540 | kfree(clp->cl_ownerstr_hashtbl); |
1da177e4 | 1541 | kfree(clp->cl_name.data); |
2d32b29a | 1542 | idr_destroy(&clp->cl_stateids); |
1da177e4 LT |
1543 | kfree(clp); |
1544 | } | |
1545 | ||
84d38ac9 BH |
1546 | /* must be called under the client_lock */ |
1547 | static inline void | |
1548 | unhash_client_locked(struct nfs4_client *clp) | |
1549 | { | |
792c95dd BF |
1550 | struct nfsd4_session *ses; |
1551 | ||
84d38ac9 | 1552 | list_del(&clp->cl_lru); |
4c649378 | 1553 | spin_lock(&clp->cl_lock); |
792c95dd BF |
1554 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
1555 | list_del_init(&ses->se_hash); | |
4c649378 | 1556 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
1557 | } |
1558 | ||
1da177e4 | 1559 | static void |
0d22f68f | 1560 | destroy_client(struct nfs4_client *clp) |
1da177e4 | 1561 | { |
fe0750e5 | 1562 | struct nfs4_openowner *oo; |
1da177e4 | 1563 | struct nfs4_delegation *dp; |
1da177e4 | 1564 | struct list_head reaplist; |
382a62e7 | 1565 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 1566 | |
1da177e4 | 1567 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 1568 | spin_lock(&state_lock); |
ea1da636 N |
1569 | while (!list_empty(&clp->cl_delegations)) { |
1570 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
42690676 JL |
1571 | unhash_delegation_locked(dp); |
1572 | list_add(&dp->dl_recall_lru, &reaplist); | |
1da177e4 | 1573 | } |
cdc97505 | 1574 | spin_unlock(&state_lock); |
1da177e4 LT |
1575 | while (!list_empty(&reaplist)) { |
1576 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
42690676 | 1577 | list_del_init(&dp->dl_recall_lru); |
6011695d | 1578 | nfs4_put_stid(&dp->dl_stid); |
1da177e4 | 1579 | } |
2d4a532d | 1580 | while (!list_empty(&clp->cl_revoked)) { |
956c4fee | 1581 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); |
2d4a532d | 1582 | list_del_init(&dp->dl_recall_lru); |
6011695d | 1583 | nfs4_put_stid(&dp->dl_stid); |
956c4fee | 1584 | } |
ea1da636 | 1585 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 | 1586 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
d3134b10 | 1587 | atomic_inc(&oo->oo_owner.so_count); |
fe0750e5 | 1588 | release_openowner(oo); |
1da177e4 | 1589 | } |
6ff8da08 | 1590 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
1591 | if (clp->cl_cb_conn.cb_xprt) |
1592 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
36acb66b | 1593 | list_del(&clp->cl_idhash); |
ac55fdc4 | 1594 | if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) |
382a62e7 | 1595 | rb_erase(&clp->cl_namenode, &nn->conf_name_tree); |
ac55fdc4 | 1596 | else |
a99454aa | 1597 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
c9a49628 | 1598 | spin_lock(&nn->client_lock); |
84d38ac9 | 1599 | unhash_client_locked(clp); |
221a6876 BF |
1600 | WARN_ON_ONCE(atomic_read(&clp->cl_refcount)); |
1601 | free_client(clp); | |
c9a49628 | 1602 | spin_unlock(&nn->client_lock); |
1da177e4 LT |
1603 | } |
1604 | ||
0d22f68f BF |
1605 | static void expire_client(struct nfs4_client *clp) |
1606 | { | |
1607 | nfsd4_client_record_remove(clp); | |
1608 | destroy_client(clp); | |
1609 | } | |
1610 | ||
35bba9a3 BF |
1611 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
1612 | { | |
1613 | memcpy(target->cl_verifier.data, source->data, | |
1614 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
1615 | } |
1616 | ||
35bba9a3 BF |
1617 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
1618 | { | |
1da177e4 LT |
1619 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
1620 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
1621 | } | |
1622 | ||
03a4e1f6 | 1623 | static int copy_cred(struct svc_cred *target, struct svc_cred *source) |
35bba9a3 | 1624 | { |
03a4e1f6 BF |
1625 | if (source->cr_principal) { |
1626 | target->cr_principal = | |
1627 | kstrdup(source->cr_principal, GFP_KERNEL); | |
1628 | if (target->cr_principal == NULL) | |
1629 | return -ENOMEM; | |
1630 | } else | |
1631 | target->cr_principal = NULL; | |
d5497fc6 | 1632 | target->cr_flavor = source->cr_flavor; |
1da177e4 LT |
1633 | target->cr_uid = source->cr_uid; |
1634 | target->cr_gid = source->cr_gid; | |
1635 | target->cr_group_info = source->cr_group_info; | |
1636 | get_group_info(target->cr_group_info); | |
0dc1531a BF |
1637 | target->cr_gss_mech = source->cr_gss_mech; |
1638 | if (source->cr_gss_mech) | |
1639 | gss_mech_get(source->cr_gss_mech); | |
03a4e1f6 | 1640 | return 0; |
1da177e4 LT |
1641 | } |
1642 | ||
ac55fdc4 JL |
1643 | static long long |
1644 | compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2) | |
1645 | { | |
1646 | long long res; | |
1647 | ||
1648 | res = o1->len - o2->len; | |
1649 | if (res) | |
1650 | return res; | |
1651 | return (long long)memcmp(o1->data, o2->data, o1->len); | |
1652 | } | |
1653 | ||
35bba9a3 | 1654 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 1655 | { |
a55370a3 | 1656 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
1657 | } |
1658 | ||
1659 | static int | |
599e0a22 BF |
1660 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1661 | { | |
1662 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
1663 | } |
1664 | ||
1665 | static int | |
599e0a22 BF |
1666 | same_clid(clientid_t *cl1, clientid_t *cl2) |
1667 | { | |
1668 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1669 | } |
1670 | ||
8fbba96e BF |
1671 | static bool groups_equal(struct group_info *g1, struct group_info *g2) |
1672 | { | |
1673 | int i; | |
1674 | ||
1675 | if (g1->ngroups != g2->ngroups) | |
1676 | return false; | |
1677 | for (i=0; i<g1->ngroups; i++) | |
6fab8779 | 1678 | if (!gid_eq(GROUP_AT(g1, i), GROUP_AT(g2, i))) |
8fbba96e BF |
1679 | return false; |
1680 | return true; | |
1681 | } | |
1682 | ||
68eb3508 BF |
1683 | /* |
1684 | * RFC 3530 language requires clid_inuse be returned when the | |
1685 | * "principal" associated with a requests differs from that previously | |
1686 | * used. We use uid, gid's, and gss principal string as our best | |
1687 | * approximation. We also don't want to allow non-gss use of a client | |
1688 | * established using gss: in theory cr_principal should catch that | |
1689 | * change, but in practice cr_principal can be null even in the gss case | |
1690 | * since gssd doesn't always pass down a principal string. | |
1691 | */ | |
1692 | static bool is_gss_cred(struct svc_cred *cr) | |
1693 | { | |
1694 | /* Is cr_flavor one of the gss "pseudoflavors"?: */ | |
1695 | return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR); | |
1696 | } | |
1697 | ||
1698 | ||
5559b50a | 1699 | static bool |
599e0a22 BF |
1700 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
1701 | { | |
68eb3508 | 1702 | if ((is_gss_cred(cr1) != is_gss_cred(cr2)) |
6fab8779 EB |
1703 | || (!uid_eq(cr1->cr_uid, cr2->cr_uid)) |
1704 | || (!gid_eq(cr1->cr_gid, cr2->cr_gid)) | |
8fbba96e BF |
1705 | || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) |
1706 | return false; | |
1707 | if (cr1->cr_principal == cr2->cr_principal) | |
1708 | return true; | |
1709 | if (!cr1->cr_principal || !cr2->cr_principal) | |
1710 | return false; | |
5559b50a | 1711 | return 0 == strcmp(cr1->cr_principal, cr2->cr_principal); |
1da177e4 LT |
1712 | } |
1713 | ||
57266a6e BF |
1714 | static bool svc_rqst_integrity_protected(struct svc_rqst *rqstp) |
1715 | { | |
1716 | struct svc_cred *cr = &rqstp->rq_cred; | |
1717 | u32 service; | |
1718 | ||
c4720591 BF |
1719 | if (!cr->cr_gss_mech) |
1720 | return false; | |
57266a6e BF |
1721 | service = gss_pseudoflavor_to_service(cr->cr_gss_mech, cr->cr_flavor); |
1722 | return service == RPC_GSS_SVC_INTEGRITY || | |
1723 | service == RPC_GSS_SVC_PRIVACY; | |
1724 | } | |
1725 | ||
1726 | static bool mach_creds_match(struct nfs4_client *cl, struct svc_rqst *rqstp) | |
1727 | { | |
1728 | struct svc_cred *cr = &rqstp->rq_cred; | |
1729 | ||
1730 | if (!cl->cl_mach_cred) | |
1731 | return true; | |
1732 | if (cl->cl_cred.cr_gss_mech != cr->cr_gss_mech) | |
1733 | return false; | |
1734 | if (!svc_rqst_integrity_protected(rqstp)) | |
1735 | return false; | |
1736 | if (!cr->cr_principal) | |
1737 | return false; | |
1738 | return 0 == strcmp(cl->cl_cred.cr_principal, cr->cr_principal); | |
1739 | } | |
1740 | ||
c212cecf | 1741 | static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn) |
5ec7b46c BF |
1742 | { |
1743 | static u32 current_clientid = 1; | |
1744 | ||
2c142baa | 1745 | clp->cl_clientid.cl_boot = nn->boot_time; |
1da177e4 LT |
1746 | clp->cl_clientid.cl_id = current_clientid++; |
1747 | } | |
1748 | ||
deda2faa BF |
1749 | static void gen_confirm(struct nfs4_client *clp) |
1750 | { | |
ab4684d1 | 1751 | __be32 verf[2]; |
deda2faa | 1752 | static u32 i; |
1da177e4 | 1753 | |
f419992c JL |
1754 | /* |
1755 | * This is opaque to client, so no need to byte-swap. Use | |
1756 | * __force to keep sparse happy | |
1757 | */ | |
1758 | verf[0] = (__force __be32)get_seconds(); | |
1759 | verf[1] = (__force __be32)i++; | |
ab4684d1 | 1760 | memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); |
1da177e4 LT |
1761 | } |
1762 | ||
4770d722 JL |
1763 | static struct nfs4_stid * |
1764 | find_stateid_locked(struct nfs4_client *cl, stateid_t *t) | |
4581d140 | 1765 | { |
3abdb607 BF |
1766 | struct nfs4_stid *ret; |
1767 | ||
1768 | ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id); | |
1769 | if (!ret || !ret->sc_type) | |
1770 | return NULL; | |
1771 | return ret; | |
4d71ab87 BF |
1772 | } |
1773 | ||
4770d722 JL |
1774 | static struct nfs4_stid * |
1775 | find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) | |
f459e453 BF |
1776 | { |
1777 | struct nfs4_stid *s; | |
4d71ab87 | 1778 | |
4770d722 JL |
1779 | spin_lock(&cl->cl_lock); |
1780 | s = find_stateid_locked(cl, t); | |
2d3f9668 TM |
1781 | if (s != NULL) { |
1782 | if (typemask & s->sc_type) | |
1783 | atomic_inc(&s->sc_count); | |
1784 | else | |
1785 | s = NULL; | |
1786 | } | |
4770d722 JL |
1787 | spin_unlock(&cl->cl_lock); |
1788 | return s; | |
4581d140 BF |
1789 | } |
1790 | ||
2216d449 | 1791 | static struct nfs4_client *create_client(struct xdr_netobj name, |
b09333c4 RL |
1792 | struct svc_rqst *rqstp, nfs4_verifier *verf) |
1793 | { | |
1794 | struct nfs4_client *clp; | |
1795 | struct sockaddr *sa = svc_addr(rqstp); | |
03a4e1f6 | 1796 | int ret; |
c212cecf | 1797 | struct net *net = SVC_NET(rqstp); |
c9a49628 | 1798 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b09333c4 RL |
1799 | |
1800 | clp = alloc_client(name); | |
1801 | if (clp == NULL) | |
1802 | return NULL; | |
1803 | ||
03a4e1f6 BF |
1804 | ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); |
1805 | if (ret) { | |
c9a49628 | 1806 | spin_lock(&nn->client_lock); |
03a4e1f6 | 1807 | free_client(clp); |
c9a49628 | 1808 | spin_unlock(&nn->client_lock); |
03a4e1f6 | 1809 | return NULL; |
b09333c4 | 1810 | } |
02e1215f | 1811 | INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_run_cb_null); |
07cd4909 | 1812 | clp->cl_time = get_seconds(); |
b09333c4 | 1813 | clear_bit(0, &clp->cl_cb_slot_busy); |
b09333c4 RL |
1814 | copy_verf(clp, verf); |
1815 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
b09333c4 | 1816 | gen_confirm(clp); |
edd76786 | 1817 | clp->cl_cb_session = NULL; |
c212cecf | 1818 | clp->net = net; |
b09333c4 RL |
1819 | return clp; |
1820 | } | |
1821 | ||
fd39ca9a | 1822 | static void |
ac55fdc4 JL |
1823 | add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root) |
1824 | { | |
1825 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
1826 | struct nfs4_client *clp; | |
1827 | ||
1828 | while (*new) { | |
1829 | clp = rb_entry(*new, struct nfs4_client, cl_namenode); | |
1830 | parent = *new; | |
1831 | ||
1832 | if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0) | |
1833 | new = &((*new)->rb_left); | |
1834 | else | |
1835 | new = &((*new)->rb_right); | |
1836 | } | |
1837 | ||
1838 | rb_link_node(&new_clp->cl_namenode, parent, new); | |
1839 | rb_insert_color(&new_clp->cl_namenode, root); | |
1840 | } | |
1841 | ||
1842 | static struct nfs4_client * | |
1843 | find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root) | |
1844 | { | |
1845 | long long cmp; | |
1846 | struct rb_node *node = root->rb_node; | |
1847 | struct nfs4_client *clp; | |
1848 | ||
1849 | while (node) { | |
1850 | clp = rb_entry(node, struct nfs4_client, cl_namenode); | |
1851 | cmp = compare_blob(&clp->cl_name, name); | |
1852 | if (cmp > 0) | |
1853 | node = node->rb_left; | |
1854 | else if (cmp < 0) | |
1855 | node = node->rb_right; | |
1856 | else | |
1857 | return clp; | |
1858 | } | |
1859 | return NULL; | |
1860 | } | |
1861 | ||
1862 | static void | |
1863 | add_to_unconfirmed(struct nfs4_client *clp) | |
1da177e4 LT |
1864 | { |
1865 | unsigned int idhashval; | |
0a7ec377 | 1866 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 1867 | |
ac55fdc4 | 1868 | clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
a99454aa | 1869 | add_clp_to_name_tree(clp, &nn->unconf_name_tree); |
1da177e4 | 1870 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
0a7ec377 | 1871 | list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]); |
36acb66b | 1872 | renew_client(clp); |
1da177e4 LT |
1873 | } |
1874 | ||
fd39ca9a | 1875 | static void |
1da177e4 LT |
1876 | move_to_confirmed(struct nfs4_client *clp) |
1877 | { | |
1878 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
8daae4dc | 1879 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 LT |
1880 | |
1881 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
8daae4dc | 1882 | list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]); |
a99454aa | 1883 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
382a62e7 | 1884 | add_clp_to_name_tree(clp, &nn->conf_name_tree); |
ac55fdc4 | 1885 | set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
1da177e4 LT |
1886 | renew_client(clp); |
1887 | } | |
1888 | ||
1889 | static struct nfs4_client * | |
bfa85e83 | 1890 | find_client_in_id_table(struct list_head *tbl, clientid_t *clid, bool sessions) |
1da177e4 LT |
1891 | { |
1892 | struct nfs4_client *clp; | |
1893 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1894 | ||
bfa85e83 | 1895 | list_for_each_entry(clp, &tbl[idhashval], cl_idhash) { |
a50d2ad1 | 1896 | if (same_clid(&clp->cl_clientid, clid)) { |
d15c077e BF |
1897 | if ((bool)clp->cl_minorversion != sessions) |
1898 | return NULL; | |
a50d2ad1 | 1899 | renew_client(clp); |
1da177e4 | 1900 | return clp; |
a50d2ad1 | 1901 | } |
1da177e4 LT |
1902 | } |
1903 | return NULL; | |
1904 | } | |
1905 | ||
bfa85e83 BF |
1906 | static struct nfs4_client * |
1907 | find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) | |
1908 | { | |
1909 | struct list_head *tbl = nn->conf_id_hashtbl; | |
1910 | ||
1911 | return find_client_in_id_table(tbl, clid, sessions); | |
1912 | } | |
1913 | ||
1da177e4 | 1914 | static struct nfs4_client * |
0a7ec377 | 1915 | find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
1da177e4 | 1916 | { |
bfa85e83 | 1917 | struct list_head *tbl = nn->unconf_id_hashtbl; |
1da177e4 | 1918 | |
bfa85e83 | 1919 | return find_client_in_id_table(tbl, clid, sessions); |
1da177e4 LT |
1920 | } |
1921 | ||
6e5f15c9 | 1922 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 1923 | { |
6e5f15c9 | 1924 | return clp->cl_exchange_flags != 0; |
e203d506 | 1925 | } |
a1bcecd2 | 1926 | |
28ce6054 | 1927 | static struct nfs4_client * |
382a62e7 | 1928 | find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 1929 | { |
382a62e7 | 1930 | return find_clp_in_name_tree(name, &nn->conf_name_tree); |
28ce6054 N |
1931 | } |
1932 | ||
1933 | static struct nfs4_client * | |
a99454aa | 1934 | find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 1935 | { |
a99454aa | 1936 | return find_clp_in_name_tree(name, &nn->unconf_name_tree); |
28ce6054 N |
1937 | } |
1938 | ||
fd39ca9a | 1939 | static void |
6f3d772f | 1940 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 1941 | { |
07263f1e | 1942 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
1943 | struct sockaddr *sa = svc_addr(rqstp); |
1944 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
1945 | unsigned short expected_family; |
1946 | ||
1947 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
1948 | if (se->se_callback_netid_len == 3 && | |
1949 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
1950 | expected_family = AF_INET; | |
1951 | else if (se->se_callback_netid_len == 4 && | |
1952 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
1953 | expected_family = AF_INET6; | |
1954 | else | |
1da177e4 LT |
1955 | goto out_err; |
1956 | ||
c212cecf | 1957 | conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val, |
aa9a4ec7 | 1958 | se->se_callback_addr_len, |
07263f1e BF |
1959 | (struct sockaddr *)&conn->cb_addr, |
1960 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 1961 | |
07263f1e | 1962 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 1963 | goto out_err; |
aa9a4ec7 | 1964 | |
07263f1e BF |
1965 | if (conn->cb_addr.ss_family == AF_INET6) |
1966 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 1967 | |
07263f1e BF |
1968 | conn->cb_prog = se->se_callback_prog; |
1969 | conn->cb_ident = se->se_callback_ident; | |
849a1cf1 | 1970 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
1da177e4 LT |
1971 | return; |
1972 | out_err: | |
07263f1e BF |
1973 | conn->cb_addr.ss_family = AF_UNSPEC; |
1974 | conn->cb_addrlen = 0; | |
849823c5 | 1975 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
1976 | "will not receive delegations\n", |
1977 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
1978 | ||
1da177e4 LT |
1979 | return; |
1980 | } | |
1981 | ||
074fe897 | 1982 | /* |
067e1ace | 1983 | * Cache a reply. nfsd4_check_resp_size() has bounded the cache size. |
074fe897 | 1984 | */ |
b607664e | 1985 | static void |
074fe897 | 1986 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) |
074fe897 | 1987 | { |
f5236013 | 1988 | struct xdr_buf *buf = resp->xdr.buf; |
557ce264 AA |
1989 | struct nfsd4_slot *slot = resp->cstate.slot; |
1990 | unsigned int base; | |
074fe897 | 1991 | |
557ce264 | 1992 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1993 | |
557ce264 AA |
1994 | slot->sl_opcnt = resp->opcnt; |
1995 | slot->sl_status = resp->cstate.status; | |
074fe897 | 1996 | |
bf5c43c8 | 1997 | slot->sl_flags |= NFSD4_SLOT_INITIALIZED; |
bf864a31 | 1998 | if (nfsd4_not_cached(resp)) { |
557ce264 | 1999 | slot->sl_datalen = 0; |
bf864a31 | 2000 | return; |
074fe897 | 2001 | } |
f5236013 BF |
2002 | base = resp->cstate.data_offset; |
2003 | slot->sl_datalen = buf->len - base; | |
2004 | if (read_bytes_from_xdr_buf(buf, base, slot->sl_data, slot->sl_datalen)) | |
557ce264 AA |
2005 | WARN("%s: sessions DRC could not cache compound\n", __func__); |
2006 | return; | |
074fe897 AA |
2007 | } |
2008 | ||
2009 | /* | |
abfabf8c AA |
2010 | * Encode the replay sequence operation from the slot values. |
2011 | * If cachethis is FALSE encode the uncached rep error on the next | |
2012 | * operation which sets resp->p and increments resp->opcnt for | |
2013 | * nfs4svc_encode_compoundres. | |
074fe897 | 2014 | * |
074fe897 | 2015 | */ |
abfabf8c AA |
2016 | static __be32 |
2017 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
2018 | struct nfsd4_compoundres *resp) | |
074fe897 | 2019 | { |
abfabf8c AA |
2020 | struct nfsd4_op *op; |
2021 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 2022 | |
abfabf8c AA |
2023 | /* Encode the replayed sequence operation */ |
2024 | op = &args->ops[resp->opcnt - 1]; | |
2025 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 2026 | |
abfabf8c | 2027 | /* Return nfserr_retry_uncached_rep in next operation. */ |
73e79482 | 2028 | if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) { |
abfabf8c AA |
2029 | op = &args->ops[resp->opcnt++]; |
2030 | op->status = nfserr_retry_uncached_rep; | |
2031 | nfsd4_encode_operation(resp, op); | |
074fe897 | 2032 | } |
abfabf8c | 2033 | return op->status; |
074fe897 AA |
2034 | } |
2035 | ||
2036 | /* | |
557ce264 AA |
2037 | * The sequence operation is not cached because we can use the slot and |
2038 | * session values. | |
074fe897 | 2039 | */ |
3ca2eb98 | 2040 | static __be32 |
bf864a31 AA |
2041 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
2042 | struct nfsd4_sequence *seq) | |
074fe897 | 2043 | { |
557ce264 | 2044 | struct nfsd4_slot *slot = resp->cstate.slot; |
f5236013 BF |
2045 | struct xdr_stream *xdr = &resp->xdr; |
2046 | __be32 *p; | |
074fe897 AA |
2047 | __be32 status; |
2048 | ||
557ce264 | 2049 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 2050 | |
abfabf8c | 2051 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); |
0da7b19c | 2052 | if (status) |
abfabf8c | 2053 | return status; |
074fe897 | 2054 | |
f5236013 BF |
2055 | p = xdr_reserve_space(xdr, slot->sl_datalen); |
2056 | if (!p) { | |
2057 | WARN_ON_ONCE(1); | |
2058 | return nfserr_serverfault; | |
2059 | } | |
2060 | xdr_encode_opaque_fixed(p, slot->sl_data, slot->sl_datalen); | |
2061 | xdr_commit_encode(xdr); | |
074fe897 | 2062 | |
557ce264 | 2063 | resp->opcnt = slot->sl_opcnt; |
f5236013 | 2064 | return slot->sl_status; |
074fe897 AA |
2065 | } |
2066 | ||
0733d213 AA |
2067 | /* |
2068 | * Set the exchange_id flags returned by the server. | |
2069 | */ | |
2070 | static void | |
2071 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
2072 | { | |
2073 | /* pNFS is not supported */ | |
2074 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
2075 | ||
2076 | /* Referrals are supported, Migration is not. */ | |
2077 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
2078 | ||
2079 | /* set the wire flags to return to client. */ | |
2080 | clid->flags = new->cl_exchange_flags; | |
2081 | } | |
2082 | ||
631fc9ea BF |
2083 | static bool client_has_state(struct nfs4_client *clp) |
2084 | { | |
2085 | /* | |
2086 | * Note clp->cl_openowners check isn't quite right: there's no | |
2087 | * need to count owners without stateid's. | |
2088 | * | |
2089 | * Also note we should probably be using this in 4.0 case too. | |
2090 | */ | |
6eccece9 BF |
2091 | return !list_empty(&clp->cl_openowners) |
2092 | || !list_empty(&clp->cl_delegations) | |
2093 | || !list_empty(&clp->cl_sessions); | |
631fc9ea BF |
2094 | } |
2095 | ||
069b6ad4 AA |
2096 | __be32 |
2097 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
2098 | struct nfsd4_compound_state *cstate, | |
2099 | struct nfsd4_exchange_id *exid) | |
2100 | { | |
0733d213 | 2101 | struct nfs4_client *unconf, *conf, *new; |
57b7b43b | 2102 | __be32 status; |
363168b4 | 2103 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 2104 | nfs4_verifier verf = exid->verifier; |
363168b4 | 2105 | struct sockaddr *sa = svc_addr(rqstp); |
83e08fd4 | 2106 | bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; |
c212cecf | 2107 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
0733d213 | 2108 | |
363168b4 | 2109 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 2110 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 2111 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 2112 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 2113 | addr_str, exid->flags, exid->spa_how); |
0733d213 | 2114 | |
a084daf5 | 2115 | if (exid->flags & ~EXCHGID4_FLAG_MASK_A) |
0733d213 AA |
2116 | return nfserr_inval; |
2117 | ||
0733d213 | 2118 | switch (exid->spa_how) { |
57266a6e BF |
2119 | case SP4_MACH_CRED: |
2120 | if (!svc_rqst_integrity_protected(rqstp)) | |
2121 | return nfserr_inval; | |
0733d213 AA |
2122 | case SP4_NONE: |
2123 | break; | |
063b0fb9 BF |
2124 | default: /* checked by xdr code */ |
2125 | WARN_ON_ONCE(1); | |
0733d213 | 2126 | case SP4_SSV: |
dd30333c | 2127 | return nfserr_encr_alg_unsupp; |
0733d213 AA |
2128 | } |
2129 | ||
2dbb269d | 2130 | /* Cases below refer to rfc 5661 section 18.35.4: */ |
0733d213 | 2131 | nfs4_lock_state(); |
382a62e7 | 2132 | conf = find_confirmed_client_by_name(&exid->clname, nn); |
0733d213 | 2133 | if (conf) { |
83e08fd4 BF |
2134 | bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); |
2135 | bool verfs_match = same_verf(&verf, &conf->cl_verifier); | |
2136 | ||
136e658d BF |
2137 | if (update) { |
2138 | if (!clp_used_exchangeid(conf)) { /* buggy client */ | |
2dbb269d | 2139 | status = nfserr_inval; |
1a308118 BF |
2140 | goto out; |
2141 | } | |
57266a6e BF |
2142 | if (!mach_creds_match(conf, rqstp)) { |
2143 | status = nfserr_wrong_cred; | |
2144 | goto out; | |
2145 | } | |
136e658d | 2146 | if (!creds_match) { /* case 9 */ |
ea236d07 | 2147 | status = nfserr_perm; |
136e658d BF |
2148 | goto out; |
2149 | } | |
2150 | if (!verfs_match) { /* case 8 */ | |
0733d213 AA |
2151 | status = nfserr_not_same; |
2152 | goto out; | |
2153 | } | |
136e658d BF |
2154 | /* case 6 */ |
2155 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
2156 | new = conf; | |
2157 | goto out_copy; | |
0733d213 | 2158 | } |
136e658d | 2159 | if (!creds_match) { /* case 3 */ |
631fc9ea BF |
2160 | if (client_has_state(conf)) { |
2161 | status = nfserr_clid_inuse; | |
0733d213 AA |
2162 | goto out; |
2163 | } | |
2164 | expire_client(conf); | |
2165 | goto out_new; | |
2166 | } | |
136e658d | 2167 | if (verfs_match) { /* case 2 */ |
0f1ba0ef | 2168 | conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; |
136e658d BF |
2169 | new = conf; |
2170 | goto out_copy; | |
2171 | } | |
2172 | /* case 5, client reboot */ | |
136e658d | 2173 | goto out_new; |
6ddbbbfe MS |
2174 | } |
2175 | ||
2dbb269d | 2176 | if (update) { /* case 7 */ |
6ddbbbfe MS |
2177 | status = nfserr_noent; |
2178 | goto out; | |
0733d213 AA |
2179 | } |
2180 | ||
a99454aa | 2181 | unconf = find_unconfirmed_client_by_name(&exid->clname, nn); |
2dbb269d | 2182 | if (unconf) /* case 4, possible retry or client restart */ |
0733d213 | 2183 | expire_client(unconf); |
0733d213 | 2184 | |
2dbb269d | 2185 | /* case 1 (normal case) */ |
0733d213 | 2186 | out_new: |
2216d449 | 2187 | new = create_client(exid->clname, rqstp, &verf); |
0733d213 | 2188 | if (new == NULL) { |
4731030d | 2189 | status = nfserr_jukebox; |
0733d213 AA |
2190 | goto out; |
2191 | } | |
4f540e29 | 2192 | new->cl_minorversion = cstate->minorversion; |
57266a6e | 2193 | new->cl_mach_cred = (exid->spa_how == SP4_MACH_CRED); |
0733d213 | 2194 | |
c212cecf | 2195 | gen_clid(new, nn); |
ac55fdc4 | 2196 | add_to_unconfirmed(new); |
0733d213 AA |
2197 | out_copy: |
2198 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
2199 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
2200 | ||
778df3f0 | 2201 | exid->seqid = new->cl_cs_slot.sl_seqid + 1; |
0733d213 AA |
2202 | nfsd4_set_ex_flags(new, exid); |
2203 | ||
2204 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
49557cc7 | 2205 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
2206 | status = nfs_ok; |
2207 | ||
2208 | out: | |
2209 | nfs4_unlock_state(); | |
0733d213 | 2210 | return status; |
069b6ad4 AA |
2211 | } |
2212 | ||
57b7b43b | 2213 | static __be32 |
88e588d5 | 2214 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 2215 | { |
88e588d5 AA |
2216 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
2217 | slot_seqid); | |
b85d4c01 BH |
2218 | |
2219 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
2220 | if (slot_inuse) { |
2221 | if (seqid == slot_seqid) | |
b85d4c01 BH |
2222 | return nfserr_jukebox; |
2223 | else | |
2224 | return nfserr_seq_misordered; | |
2225 | } | |
f6d82485 | 2226 | /* Note unsigned 32-bit arithmetic handles wraparound: */ |
88e588d5 | 2227 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 | 2228 | return nfs_ok; |
88e588d5 | 2229 | if (seqid == slot_seqid) |
b85d4c01 | 2230 | return nfserr_replay_cache; |
b85d4c01 BH |
2231 | return nfserr_seq_misordered; |
2232 | } | |
2233 | ||
49557cc7 AA |
2234 | /* |
2235 | * Cache the create session result into the create session single DRC | |
2236 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
2237 | * Do this for solo or embedded create session operations. | |
2238 | */ | |
2239 | static void | |
2240 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
57b7b43b | 2241 | struct nfsd4_clid_slot *slot, __be32 nfserr) |
49557cc7 AA |
2242 | { |
2243 | slot->sl_status = nfserr; | |
2244 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
2245 | } | |
2246 | ||
2247 | static __be32 | |
2248 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
2249 | struct nfsd4_clid_slot *slot) | |
2250 | { | |
2251 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
2252 | return slot->sl_status; | |
2253 | } | |
2254 | ||
1b74c25b MJ |
2255 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
2256 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
2257 | 1 + /* MIN tag is length with zero, only length */ \ | |
2258 | 3 + /* version, opcount, opcode */ \ | |
2259 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
2260 | /* seqid, slotID, slotID, cache */ \ | |
2261 | 4 ) * sizeof(__be32)) | |
2262 | ||
2263 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
2264 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
2265 | 1 + /* status */ \ | |
2266 | 1 + /* MIN tag is length with zero, only length */ \ | |
2267 | 3 + /* opcount, opcode, opstatus*/ \ | |
2268 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
2269 | /* seqid, slotID, slotID, slotID, status */ \ | |
2270 | 5 ) * sizeof(__be32)) | |
2271 | ||
55c760cf | 2272 | static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs *ca, struct nfsd_net *nn) |
1b74c25b | 2273 | { |
55c760cf BF |
2274 | u32 maxrpc = nn->nfsd_serv->sv_max_mesg; |
2275 | ||
373cd409 BF |
2276 | if (ca->maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ) |
2277 | return nfserr_toosmall; | |
2278 | if (ca->maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ) | |
2279 | return nfserr_toosmall; | |
55c760cf BF |
2280 | ca->headerpadsz = 0; |
2281 | ca->maxreq_sz = min_t(u32, ca->maxreq_sz, maxrpc); | |
2282 | ca->maxresp_sz = min_t(u32, ca->maxresp_sz, maxrpc); | |
2283 | ca->maxops = min_t(u32, ca->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
2284 | ca->maxresp_cached = min_t(u32, ca->maxresp_cached, | |
2285 | NFSD_SLOT_CACHE_SIZE + NFSD_MIN_HDR_SEQ_SZ); | |
2286 | ca->maxreqs = min_t(u32, ca->maxreqs, NFSD_MAX_SLOTS_PER_SESSION); | |
2287 | /* | |
2288 | * Note decreasing slot size below client's request may make it | |
2289 | * difficult for client to function correctly, whereas | |
2290 | * decreasing the number of slots will (just?) affect | |
2291 | * performance. When short on memory we therefore prefer to | |
2292 | * decrease number of slots instead of their size. Clients that | |
2293 | * request larger slots than they need will get poor results: | |
2294 | */ | |
2295 | ca->maxreqs = nfsd4_get_drc_mem(ca); | |
2296 | if (!ca->maxreqs) | |
2297 | return nfserr_jukebox; | |
2298 | ||
373cd409 | 2299 | return nfs_ok; |
1b74c25b MJ |
2300 | } |
2301 | ||
8a891633 KM |
2302 | #define NFSD_CB_MAX_REQ_SZ ((NFS4_enc_cb_recall_sz + \ |
2303 | RPC_MAX_HEADER_WITH_AUTH) * sizeof(__be32)) | |
2304 | #define NFSD_CB_MAX_RESP_SZ ((NFS4_dec_cb_recall_sz + \ | |
2305 | RPC_MAX_REPHEADER_WITH_AUTH) * sizeof(__be32)) | |
2306 | ||
06b332a5 | 2307 | static __be32 check_backchannel_attrs(struct nfsd4_channel_attrs *ca) |
1b74c25b | 2308 | { |
06b332a5 BF |
2309 | ca->headerpadsz = 0; |
2310 | ||
2311 | /* | |
2312 | * These RPC_MAX_HEADER macros are overkill, especially since we | |
2313 | * don't even do gss on the backchannel yet. But this is still | |
2314 | * less than 1k. Tighten up this estimate in the unlikely event | |
2315 | * it turns out to be a problem for some client: | |
2316 | */ | |
8a891633 | 2317 | if (ca->maxreq_sz < NFSD_CB_MAX_REQ_SZ) |
06b332a5 | 2318 | return nfserr_toosmall; |
8a891633 | 2319 | if (ca->maxresp_sz < NFSD_CB_MAX_RESP_SZ) |
06b332a5 BF |
2320 | return nfserr_toosmall; |
2321 | ca->maxresp_cached = 0; | |
2322 | if (ca->maxops < 2) | |
2323 | return nfserr_toosmall; | |
2324 | ||
2325 | return nfs_ok; | |
1b74c25b MJ |
2326 | } |
2327 | ||
b78724b7 BF |
2328 | static __be32 nfsd4_check_cb_sec(struct nfsd4_cb_sec *cbs) |
2329 | { | |
2330 | switch (cbs->flavor) { | |
2331 | case RPC_AUTH_NULL: | |
2332 | case RPC_AUTH_UNIX: | |
2333 | return nfs_ok; | |
2334 | default: | |
2335 | /* | |
2336 | * GSS case: the spec doesn't allow us to return this | |
2337 | * error. But it also doesn't allow us not to support | |
2338 | * GSS. | |
2339 | * I'd rather this fail hard than return some error the | |
2340 | * client might think it can already handle: | |
2341 | */ | |
2342 | return nfserr_encr_alg_unsupp; | |
2343 | } | |
2344 | } | |
2345 | ||
069b6ad4 AA |
2346 | __be32 |
2347 | nfsd4_create_session(struct svc_rqst *rqstp, | |
2348 | struct nfsd4_compound_state *cstate, | |
2349 | struct nfsd4_create_session *cr_ses) | |
2350 | { | |
363168b4 | 2351 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 2352 | struct nfs4_client *conf, *unconf; |
ac7c46f2 | 2353 | struct nfsd4_session *new; |
81f0b2a4 | 2354 | struct nfsd4_conn *conn; |
49557cc7 | 2355 | struct nfsd4_clid_slot *cs_slot = NULL; |
57b7b43b | 2356 | __be32 status = 0; |
8daae4dc | 2357 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
ec6b5d7b | 2358 | |
a62573dc MJ |
2359 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
2360 | return nfserr_inval; | |
b78724b7 BF |
2361 | status = nfsd4_check_cb_sec(&cr_ses->cb_sec); |
2362 | if (status) | |
2363 | return status; | |
55c760cf | 2364 | status = check_forechannel_attrs(&cr_ses->fore_channel, nn); |
06b332a5 BF |
2365 | if (status) |
2366 | return status; | |
2367 | status = check_backchannel_attrs(&cr_ses->back_channel); | |
373cd409 | 2368 | if (status) |
f403e450 | 2369 | goto out_release_drc_mem; |
81f0b2a4 | 2370 | status = nfserr_jukebox; |
60810e54 | 2371 | new = alloc_session(&cr_ses->fore_channel, &cr_ses->back_channel); |
55c760cf BF |
2372 | if (!new) |
2373 | goto out_release_drc_mem; | |
81f0b2a4 BF |
2374 | conn = alloc_conn_from_crses(rqstp, cr_ses); |
2375 | if (!conn) | |
2376 | goto out_free_session; | |
a62573dc | 2377 | |
ec6b5d7b | 2378 | nfs4_lock_state(); |
0a7ec377 | 2379 | unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn); |
8daae4dc | 2380 | conf = find_confirmed_client(&cr_ses->clientid, true, nn); |
78389046 | 2381 | WARN_ON_ONCE(conf && unconf); |
ec6b5d7b AA |
2382 | |
2383 | if (conf) { | |
57266a6e BF |
2384 | status = nfserr_wrong_cred; |
2385 | if (!mach_creds_match(conf, rqstp)) | |
2386 | goto out_free_conn; | |
49557cc7 AA |
2387 | cs_slot = &conf->cl_cs_slot; |
2388 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 2389 | if (status == nfserr_replay_cache) { |
49557cc7 | 2390 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
81f0b2a4 | 2391 | goto out_free_conn; |
49557cc7 | 2392 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b | 2393 | status = nfserr_seq_misordered; |
81f0b2a4 | 2394 | goto out_free_conn; |
ec6b5d7b | 2395 | } |
ec6b5d7b | 2396 | } else if (unconf) { |
8f9d3d3b | 2397 | struct nfs4_client *old; |
ec6b5d7b | 2398 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || |
363168b4 | 2399 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b | 2400 | status = nfserr_clid_inuse; |
81f0b2a4 | 2401 | goto out_free_conn; |
ec6b5d7b | 2402 | } |
57266a6e BF |
2403 | status = nfserr_wrong_cred; |
2404 | if (!mach_creds_match(unconf, rqstp)) | |
2405 | goto out_free_conn; | |
49557cc7 AA |
2406 | cs_slot = &unconf->cl_cs_slot; |
2407 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
2408 | if (status) { |
2409 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 2410 | status = nfserr_seq_misordered; |
81f0b2a4 | 2411 | goto out_free_conn; |
ec6b5d7b | 2412 | } |
382a62e7 | 2413 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
221a6876 BF |
2414 | if (old) { |
2415 | status = mark_client_expired(old); | |
2416 | if (status) | |
2417 | goto out_free_conn; | |
8f9d3d3b | 2418 | expire_client(old); |
221a6876 | 2419 | } |
8f9d3d3b | 2420 | move_to_confirmed(unconf); |
ec6b5d7b AA |
2421 | conf = unconf; |
2422 | } else { | |
2423 | status = nfserr_stale_clientid; | |
81f0b2a4 | 2424 | goto out_free_conn; |
ec6b5d7b | 2425 | } |
81f0b2a4 | 2426 | status = nfs_ok; |
408b79bc BF |
2427 | /* |
2428 | * We do not support RDMA or persistent sessions | |
2429 | */ | |
2430 | cr_ses->flags &= ~SESSION4_PERSIST; | |
2431 | cr_ses->flags &= ~SESSION4_RDMA; | |
2432 | ||
81f0b2a4 BF |
2433 | init_session(rqstp, new, conf, cr_ses); |
2434 | nfsd4_init_conn(rqstp, conn, new); | |
2435 | ||
ac7c46f2 | 2436 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, |
ec6b5d7b | 2437 | NFS4_MAX_SESSIONID_LEN); |
86c3e16c | 2438 | cs_slot->sl_seqid++; |
49557cc7 | 2439 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 2440 | |
49557cc7 AA |
2441 | /* cache solo and embedded create sessions under the state lock */ |
2442 | nfsd4_cache_create_session(cr_ses, cs_slot, status); | |
ec6b5d7b | 2443 | nfs4_unlock_state(); |
ec6b5d7b | 2444 | return status; |
81f0b2a4 | 2445 | out_free_conn: |
266533c6 | 2446 | nfs4_unlock_state(); |
81f0b2a4 BF |
2447 | free_conn(conn); |
2448 | out_free_session: | |
2449 | __free_session(new); | |
55c760cf BF |
2450 | out_release_drc_mem: |
2451 | nfsd4_put_drc_mem(&cr_ses->fore_channel); | |
1ca50792 | 2452 | return status; |
069b6ad4 AA |
2453 | } |
2454 | ||
1d1bc8f2 BF |
2455 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
2456 | { | |
2457 | switch (*dir) { | |
2458 | case NFS4_CDFC4_FORE: | |
2459 | case NFS4_CDFC4_BACK: | |
2460 | return nfs_ok; | |
2461 | case NFS4_CDFC4_FORE_OR_BOTH: | |
2462 | case NFS4_CDFC4_BACK_OR_BOTH: | |
2463 | *dir = NFS4_CDFC4_BOTH; | |
2464 | return nfs_ok; | |
2465 | }; | |
2466 | return nfserr_inval; | |
2467 | } | |
2468 | ||
cb73a9f4 BF |
2469 | __be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_backchannel_ctl *bc) |
2470 | { | |
2471 | struct nfsd4_session *session = cstate->session; | |
c9a49628 | 2472 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
b78724b7 | 2473 | __be32 status; |
cb73a9f4 | 2474 | |
b78724b7 BF |
2475 | status = nfsd4_check_cb_sec(&bc->bc_cb_sec); |
2476 | if (status) | |
2477 | return status; | |
c9a49628 | 2478 | spin_lock(&nn->client_lock); |
cb73a9f4 BF |
2479 | session->se_cb_prog = bc->bc_cb_program; |
2480 | session->se_cb_sec = bc->bc_cb_sec; | |
c9a49628 | 2481 | spin_unlock(&nn->client_lock); |
cb73a9f4 BF |
2482 | |
2483 | nfsd4_probe_callback(session->se_client); | |
2484 | ||
2485 | return nfs_ok; | |
2486 | } | |
2487 | ||
1d1bc8f2 BF |
2488 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, |
2489 | struct nfsd4_compound_state *cstate, | |
2490 | struct nfsd4_bind_conn_to_session *bcts) | |
2491 | { | |
2492 | __be32 status; | |
3ba63671 | 2493 | struct nfsd4_conn *conn; |
4f6e6c17 | 2494 | struct nfsd4_session *session; |
d4e19e70 TM |
2495 | struct net *net = SVC_NET(rqstp); |
2496 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1d1bc8f2 BF |
2497 | |
2498 | if (!nfsd4_last_compound_op(rqstp)) | |
2499 | return nfserr_not_only_op; | |
4f6e6c17 | 2500 | nfs4_lock_state(); |
c9a49628 | 2501 | spin_lock(&nn->client_lock); |
d4e19e70 | 2502 | session = find_in_sessionid_hashtbl(&bcts->sessionid, net, &status); |
c9a49628 | 2503 | spin_unlock(&nn->client_lock); |
4f6e6c17 | 2504 | if (!session) |
d4e19e70 | 2505 | goto out_no_session; |
57266a6e BF |
2506 | status = nfserr_wrong_cred; |
2507 | if (!mach_creds_match(session->se_client, rqstp)) | |
2508 | goto out; | |
1d1bc8f2 | 2509 | status = nfsd4_map_bcts_dir(&bcts->dir); |
3ba63671 | 2510 | if (status) |
4f6e6c17 | 2511 | goto out; |
3ba63671 | 2512 | conn = alloc_conn(rqstp, bcts->dir); |
4f6e6c17 | 2513 | status = nfserr_jukebox; |
3ba63671 | 2514 | if (!conn) |
4f6e6c17 BF |
2515 | goto out; |
2516 | nfsd4_init_conn(rqstp, conn, session); | |
2517 | status = nfs_ok; | |
2518 | out: | |
d4e19e70 TM |
2519 | nfsd4_put_session(session); |
2520 | out_no_session: | |
4f6e6c17 BF |
2521 | nfs4_unlock_state(); |
2522 | return status; | |
1d1bc8f2 BF |
2523 | } |
2524 | ||
5d4cec2f BF |
2525 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
2526 | { | |
2527 | if (!session) | |
2528 | return 0; | |
2529 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
2530 | } | |
2531 | ||
069b6ad4 AA |
2532 | __be32 |
2533 | nfsd4_destroy_session(struct svc_rqst *r, | |
2534 | struct nfsd4_compound_state *cstate, | |
2535 | struct nfsd4_destroy_session *sessionid) | |
2536 | { | |
e10e0cfc | 2537 | struct nfsd4_session *ses; |
abcdff09 | 2538 | __be32 status; |
f0f51f5c | 2539 | int ref_held_by_me = 0; |
d4e19e70 TM |
2540 | struct net *net = SVC_NET(r); |
2541 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
e10e0cfc | 2542 | |
abcdff09 BF |
2543 | nfs4_lock_state(); |
2544 | status = nfserr_not_only_op; | |
5d4cec2f | 2545 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 | 2546 | if (!nfsd4_last_compound_op(r)) |
abcdff09 | 2547 | goto out; |
f0f51f5c | 2548 | ref_held_by_me++; |
57716355 | 2549 | } |
e10e0cfc | 2550 | dump_sessionid(__func__, &sessionid->sessionid); |
c9a49628 | 2551 | spin_lock(&nn->client_lock); |
d4e19e70 | 2552 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid, net, &status); |
abcdff09 BF |
2553 | if (!ses) |
2554 | goto out_client_lock; | |
57266a6e BF |
2555 | status = nfserr_wrong_cred; |
2556 | if (!mach_creds_match(ses->se_client, r)) | |
d4e19e70 | 2557 | goto out_put_session; |
f0f51f5c | 2558 | status = mark_session_dead_locked(ses, 1 + ref_held_by_me); |
66b2b9b2 | 2559 | if (status) |
f0f51f5c | 2560 | goto out_put_session; |
e10e0cfc | 2561 | unhash_session(ses); |
c9a49628 | 2562 | spin_unlock(&nn->client_lock); |
e10e0cfc | 2563 | |
84f5f7cc | 2564 | nfsd4_probe_callback_sync(ses->se_client); |
19cf5c02 | 2565 | |
c9a49628 | 2566 | spin_lock(&nn->client_lock); |
e10e0cfc | 2567 | status = nfs_ok; |
f0f51f5c | 2568 | out_put_session: |
d4e19e70 | 2569 | nfsd4_put_session_locked(ses); |
abcdff09 BF |
2570 | out_client_lock: |
2571 | spin_unlock(&nn->client_lock); | |
e10e0cfc | 2572 | out: |
abcdff09 | 2573 | nfs4_unlock_state(); |
e10e0cfc | 2574 | return status; |
069b6ad4 AA |
2575 | } |
2576 | ||
a663bdd8 | 2577 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
2578 | { |
2579 | struct nfsd4_conn *c; | |
2580 | ||
2581 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 2582 | if (c->cn_xprt == xpt) { |
328ead28 BF |
2583 | return c; |
2584 | } | |
2585 | } | |
2586 | return NULL; | |
2587 | } | |
2588 | ||
57266a6e | 2589 | static __be32 nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
2590 | { |
2591 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 2592 | struct nfsd4_conn *c; |
57266a6e | 2593 | __be32 status = nfs_ok; |
21b75b01 | 2594 | int ret; |
328ead28 BF |
2595 | |
2596 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 2597 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
57266a6e BF |
2598 | if (c) |
2599 | goto out_free; | |
2600 | status = nfserr_conn_not_bound_to_session; | |
2601 | if (clp->cl_mach_cred) | |
2602 | goto out_free; | |
328ead28 BF |
2603 | __nfsd4_hash_conn(new, ses); |
2604 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
2605 | ret = nfsd4_register_conn(new); |
2606 | if (ret) | |
2607 | /* oops; xprt is already down: */ | |
2608 | nfsd4_conn_lost(&new->cn_xpt_user); | |
57266a6e BF |
2609 | return nfs_ok; |
2610 | out_free: | |
2611 | spin_unlock(&clp->cl_lock); | |
2612 | free_conn(new); | |
2613 | return status; | |
328ead28 BF |
2614 | } |
2615 | ||
868b89c3 MJ |
2616 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
2617 | { | |
2618 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
2619 | ||
2620 | return args->opcnt > session->se_fchannel.maxops; | |
2621 | } | |
2622 | ||
ae82a8d0 MJ |
2623 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
2624 | struct nfsd4_session *session) | |
2625 | { | |
2626 | struct xdr_buf *xb = &rqstp->rq_arg; | |
2627 | ||
2628 | return xb->len > session->se_fchannel.maxreq_sz; | |
2629 | } | |
2630 | ||
069b6ad4 | 2631 | __be32 |
b85d4c01 | 2632 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
2633 | struct nfsd4_compound_state *cstate, |
2634 | struct nfsd4_sequence *seq) | |
2635 | { | |
f9bb94c4 | 2636 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
47ee5298 | 2637 | struct xdr_stream *xdr = &resp->xdr; |
b85d4c01 | 2638 | struct nfsd4_session *session; |
221a6876 | 2639 | struct nfs4_client *clp; |
b85d4c01 | 2640 | struct nfsd4_slot *slot; |
a663bdd8 | 2641 | struct nfsd4_conn *conn; |
57b7b43b | 2642 | __be32 status; |
47ee5298 | 2643 | int buflen; |
d4e19e70 TM |
2644 | struct net *net = SVC_NET(rqstp); |
2645 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
b85d4c01 | 2646 | |
f9bb94c4 AA |
2647 | if (resp->opcnt != 1) |
2648 | return nfserr_sequence_pos; | |
2649 | ||
a663bdd8 BF |
2650 | /* |
2651 | * Will be either used or freed by nfsd4_sequence_check_conn | |
2652 | * below. | |
2653 | */ | |
2654 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
2655 | if (!conn) | |
2656 | return nfserr_jukebox; | |
2657 | ||
c9a49628 | 2658 | spin_lock(&nn->client_lock); |
d4e19e70 | 2659 | session = find_in_sessionid_hashtbl(&seq->sessionid, net, &status); |
b85d4c01 | 2660 | if (!session) |
221a6876 BF |
2661 | goto out_no_session; |
2662 | clp = session->se_client; | |
b85d4c01 | 2663 | |
868b89c3 MJ |
2664 | status = nfserr_too_many_ops; |
2665 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
66b2b9b2 | 2666 | goto out_put_session; |
868b89c3 | 2667 | |
ae82a8d0 MJ |
2668 | status = nfserr_req_too_big; |
2669 | if (nfsd4_request_too_big(rqstp, session)) | |
66b2b9b2 | 2670 | goto out_put_session; |
ae82a8d0 | 2671 | |
b85d4c01 | 2672 | status = nfserr_badslot; |
6c18ba9f | 2673 | if (seq->slotid >= session->se_fchannel.maxreqs) |
66b2b9b2 | 2674 | goto out_put_session; |
b85d4c01 | 2675 | |
557ce264 | 2676 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
2677 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
2678 | ||
a8dfdaeb AA |
2679 | /* We do not negotiate the number of slots yet, so set the |
2680 | * maxslots to the session maxreqs which is used to encode | |
2681 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
2682 | seq->maxslots = session->se_fchannel.maxreqs; | |
2683 | ||
73e79482 BF |
2684 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, |
2685 | slot->sl_flags & NFSD4_SLOT_INUSE); | |
b85d4c01 | 2686 | if (status == nfserr_replay_cache) { |
bf5c43c8 BF |
2687 | status = nfserr_seq_misordered; |
2688 | if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) | |
66b2b9b2 | 2689 | goto out_put_session; |
b85d4c01 BH |
2690 | cstate->slot = slot; |
2691 | cstate->session = session; | |
4b24ca7d | 2692 | cstate->clp = clp; |
da3846a2 | 2693 | /* Return the cached reply status and set cstate->status |
557ce264 | 2694 | * for nfsd4_proc_compound processing */ |
bf864a31 | 2695 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 2696 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 2697 | goto out; |
b85d4c01 BH |
2698 | } |
2699 | if (status) | |
66b2b9b2 | 2700 | goto out_put_session; |
b85d4c01 | 2701 | |
57266a6e | 2702 | status = nfsd4_sequence_check_conn(conn, session); |
a663bdd8 | 2703 | conn = NULL; |
57266a6e BF |
2704 | if (status) |
2705 | goto out_put_session; | |
328ead28 | 2706 | |
47ee5298 BF |
2707 | buflen = (seq->cachethis) ? |
2708 | session->se_fchannel.maxresp_cached : | |
2709 | session->se_fchannel.maxresp_sz; | |
2710 | status = (seq->cachethis) ? nfserr_rep_too_big_to_cache : | |
2711 | nfserr_rep_too_big; | |
a5cddc88 | 2712 | if (xdr_restrict_buflen(xdr, buflen - rqstp->rq_auth_slack)) |
47ee5298 | 2713 | goto out_put_session; |
32aaa62e | 2714 | svc_reserve(rqstp, buflen); |
47ee5298 BF |
2715 | |
2716 | status = nfs_ok; | |
b85d4c01 | 2717 | /* Success! bump slot seqid */ |
b85d4c01 | 2718 | slot->sl_seqid = seq->seqid; |
bf5c43c8 | 2719 | slot->sl_flags |= NFSD4_SLOT_INUSE; |
73e79482 BF |
2720 | if (seq->cachethis) |
2721 | slot->sl_flags |= NFSD4_SLOT_CACHETHIS; | |
bf5c43c8 BF |
2722 | else |
2723 | slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; | |
b85d4c01 BH |
2724 | |
2725 | cstate->slot = slot; | |
2726 | cstate->session = session; | |
4b24ca7d | 2727 | cstate->clp = clp; |
b85d4c01 | 2728 | |
b85d4c01 | 2729 | out: |
221a6876 BF |
2730 | switch (clp->cl_cb_state) { |
2731 | case NFSD4_CB_DOWN: | |
2732 | seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; | |
2733 | break; | |
2734 | case NFSD4_CB_FAULT: | |
2735 | seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; | |
2736 | break; | |
2737 | default: | |
2738 | seq->status_flags = 0; | |
aaf84eb9 | 2739 | } |
3bd64a5b BF |
2740 | if (!list_empty(&clp->cl_revoked)) |
2741 | seq->status_flags |= SEQ4_STATUS_RECALLABLE_STATE_REVOKED; | |
221a6876 | 2742 | out_no_session: |
3f42d2c4 KM |
2743 | if (conn) |
2744 | free_conn(conn); | |
c9a49628 | 2745 | spin_unlock(&nn->client_lock); |
b85d4c01 | 2746 | return status; |
66b2b9b2 | 2747 | out_put_session: |
d4e19e70 | 2748 | nfsd4_put_session_locked(session); |
221a6876 | 2749 | goto out_no_session; |
069b6ad4 AA |
2750 | } |
2751 | ||
b607664e TM |
2752 | void |
2753 | nfsd4_sequence_done(struct nfsd4_compoundres *resp) | |
2754 | { | |
2755 | struct nfsd4_compound_state *cs = &resp->cstate; | |
2756 | ||
2757 | if (nfsd4_has_session(cs)) { | |
b607664e TM |
2758 | if (cs->status != nfserr_replay_cache) { |
2759 | nfsd4_store_cache_entry(resp); | |
2760 | cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE; | |
2761 | } | |
d4e19e70 | 2762 | /* Drop session reference that was taken in nfsd4_sequence() */ |
b607664e | 2763 | nfsd4_put_session(cs->session); |
4b24ca7d JL |
2764 | } else if (cs->clp) |
2765 | put_client_renew(cs->clp); | |
b607664e TM |
2766 | } |
2767 | ||
345c2842 MJ |
2768 | __be32 |
2769 | nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) | |
2770 | { | |
2771 | struct nfs4_client *conf, *unconf, *clp; | |
57b7b43b | 2772 | __be32 status = 0; |
8daae4dc | 2773 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
345c2842 MJ |
2774 | |
2775 | nfs4_lock_state(); | |
0a7ec377 | 2776 | unconf = find_unconfirmed_client(&dc->clientid, true, nn); |
8daae4dc | 2777 | conf = find_confirmed_client(&dc->clientid, true, nn); |
78389046 | 2778 | WARN_ON_ONCE(conf && unconf); |
345c2842 MJ |
2779 | |
2780 | if (conf) { | |
2781 | clp = conf; | |
2782 | ||
c0293b01 | 2783 | if (client_has_state(conf)) { |
345c2842 MJ |
2784 | status = nfserr_clientid_busy; |
2785 | goto out; | |
2786 | } | |
2787 | } else if (unconf) | |
2788 | clp = unconf; | |
2789 | else { | |
2790 | status = nfserr_stale_clientid; | |
2791 | goto out; | |
2792 | } | |
57266a6e BF |
2793 | if (!mach_creds_match(clp, rqstp)) { |
2794 | status = nfserr_wrong_cred; | |
2795 | goto out; | |
2796 | } | |
345c2842 MJ |
2797 | expire_client(clp); |
2798 | out: | |
2799 | nfs4_unlock_state(); | |
345c2842 MJ |
2800 | return status; |
2801 | } | |
2802 | ||
4dc6ec00 BF |
2803 | __be32 |
2804 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
2805 | { | |
57b7b43b | 2806 | __be32 status = 0; |
bcecf1cc | 2807 | |
4dc6ec00 BF |
2808 | if (rc->rca_one_fs) { |
2809 | if (!cstate->current_fh.fh_dentry) | |
2810 | return nfserr_nofilehandle; | |
2811 | /* | |
2812 | * We don't take advantage of the rca_one_fs case. | |
2813 | * That's OK, it's optional, we can safely ignore it. | |
2814 | */ | |
2815 | return nfs_ok; | |
2816 | } | |
bcecf1cc | 2817 | |
4dc6ec00 | 2818 | nfs4_lock_state(); |
bcecf1cc | 2819 | status = nfserr_complete_already; |
a52d726b JL |
2820 | if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, |
2821 | &cstate->session->se_client->cl_flags)) | |
bcecf1cc MJ |
2822 | goto out; |
2823 | ||
2824 | status = nfserr_stale_clientid; | |
2825 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
2826 | /* |
2827 | * The following error isn't really legal. | |
2828 | * But we only get here if the client just explicitly | |
2829 | * destroyed the client. Surely it no longer cares what | |
2830 | * error it gets back on an operation for the dead | |
2831 | * client. | |
2832 | */ | |
bcecf1cc MJ |
2833 | goto out; |
2834 | ||
2835 | status = nfs_ok; | |
2a4317c5 | 2836 | nfsd4_client_record_create(cstate->session->se_client); |
bcecf1cc | 2837 | out: |
4dc6ec00 | 2838 | nfs4_unlock_state(); |
bcecf1cc | 2839 | return status; |
4dc6ec00 BF |
2840 | } |
2841 | ||
b37ad28b | 2842 | __be32 |
b591480b BF |
2843 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2844 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 2845 | { |
a084daf5 | 2846 | struct xdr_netobj clname = setclid->se_name; |
1da177e4 | 2847 | nfs4_verifier clverifier = setclid->se_verf; |
28ce6054 | 2848 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 2849 | __be32 status; |
c212cecf SK |
2850 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
2851 | ||
63db4632 | 2852 | /* Cases below refer to rfc 3530 section 14.2.33: */ |
1da177e4 | 2853 | nfs4_lock_state(); |
382a62e7 | 2854 | conf = find_confirmed_client_by_name(&clname, nn); |
28ce6054 | 2855 | if (conf) { |
63db4632 | 2856 | /* case 0: */ |
1da177e4 | 2857 | status = nfserr_clid_inuse; |
e203d506 BF |
2858 | if (clp_used_exchangeid(conf)) |
2859 | goto out; | |
026722c2 | 2860 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
2861 | char addr_str[INET6_ADDRSTRLEN]; |
2862 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
2863 | sizeof(addr_str)); | |
2864 | dprintk("NFSD: setclientid: string in use by client " | |
2865 | "at %s\n", addr_str); | |
1da177e4 LT |
2866 | goto out; |
2867 | } | |
1da177e4 | 2868 | } |
a99454aa | 2869 | unconf = find_unconfirmed_client_by_name(&clname, nn); |
8f930711 BF |
2870 | if (unconf) |
2871 | expire_client(unconf); | |
3e772463 | 2872 | status = nfserr_jukebox; |
2216d449 | 2873 | new = create_client(clname, rqstp, &clverifier); |
8f930711 BF |
2874 | if (new == NULL) |
2875 | goto out; | |
34b232bb | 2876 | if (conf && same_verf(&conf->cl_verifier, &clverifier)) |
63db4632 | 2877 | /* case 1: probable callback update */ |
1da177e4 | 2878 | copy_clid(new, conf); |
34b232bb | 2879 | else /* case 4 (new client) or cases 2, 3 (client reboot): */ |
c212cecf | 2880 | gen_clid(new, nn); |
8323c3b2 | 2881 | new->cl_minorversion = 0; |
6f3d772f | 2882 | gen_callback(new, setclid, rqstp); |
ac55fdc4 | 2883 | add_to_unconfirmed(new); |
1da177e4 LT |
2884 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
2885 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
2886 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
2887 | status = nfs_ok; | |
2888 | out: | |
2889 | nfs4_unlock_state(); | |
2890 | return status; | |
2891 | } | |
2892 | ||
2893 | ||
b37ad28b | 2894 | __be32 |
b591480b BF |
2895 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
2896 | struct nfsd4_compound_state *cstate, | |
2897 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 2898 | { |
21ab45a4 | 2899 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
2900 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
2901 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 2902 | __be32 status; |
7f2210fa | 2903 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 2904 | |
2c142baa | 2905 | if (STALE_CLIENTID(clid, nn)) |
1da177e4 | 2906 | return nfserr_stale_clientid; |
1da177e4 | 2907 | nfs4_lock_state(); |
21ab45a4 | 2908 | |
8daae4dc | 2909 | conf = find_confirmed_client(clid, false, nn); |
0a7ec377 | 2910 | unconf = find_unconfirmed_client(clid, false, nn); |
a186e767 | 2911 | /* |
8695b90a BF |
2912 | * We try hard to give out unique clientid's, so if we get an |
2913 | * attempt to confirm the same clientid with a different cred, | |
2914 | * there's a bug somewhere. Let's charitably assume it's our | |
2915 | * bug. | |
a186e767 | 2916 | */ |
8695b90a BF |
2917 | status = nfserr_serverfault; |
2918 | if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) | |
2919 | goto out; | |
2920 | if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) | |
2921 | goto out; | |
63db4632 | 2922 | /* cases below refer to rfc 3530 section 14.2.34: */ |
90d700b7 BF |
2923 | if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) { |
2924 | if (conf && !unconf) /* case 2: probable retransmit */ | |
1da177e4 | 2925 | status = nfs_ok; |
90d700b7 BF |
2926 | else /* case 4: client hasn't noticed we rebooted yet? */ |
2927 | status = nfserr_stale_clientid; | |
2928 | goto out; | |
2929 | } | |
2930 | status = nfs_ok; | |
2931 | if (conf) { /* case 1: callback update */ | |
8695b90a BF |
2932 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
2933 | nfsd4_probe_callback(conf); | |
2934 | expire_client(unconf); | |
90d700b7 | 2935 | } else { /* case 3: normal case; new or rebooted client */ |
382a62e7 | 2936 | conf = find_confirmed_client_by_name(&unconf->cl_name, nn); |
221a6876 BF |
2937 | if (conf) { |
2938 | status = mark_client_expired(conf); | |
2939 | if (status) | |
2940 | goto out; | |
8695b90a | 2941 | expire_client(conf); |
221a6876 | 2942 | } |
8695b90a | 2943 | move_to_confirmed(unconf); |
f3d03b92 | 2944 | nfsd4_probe_callback(unconf); |
08e8987c | 2945 | } |
1da177e4 | 2946 | out: |
1da177e4 LT |
2947 | nfs4_unlock_state(); |
2948 | return status; | |
2949 | } | |
2950 | ||
32513b40 BF |
2951 | static struct nfs4_file *nfsd4_alloc_file(void) |
2952 | { | |
2953 | return kmem_cache_alloc(file_slab, GFP_KERNEL); | |
2954 | } | |
2955 | ||
1da177e4 | 2956 | /* OPEN Share state helper functions */ |
f9c00c3a | 2957 | static void nfsd4_init_file(struct nfs4_file *fp, struct knfsd_fh *fh) |
1da177e4 | 2958 | { |
ca943217 | 2959 | unsigned int hashval = file_hashval(fh); |
1da177e4 | 2960 | |
950e0118 TM |
2961 | lockdep_assert_held(&state_lock); |
2962 | ||
32513b40 | 2963 | atomic_set(&fp->fi_ref, 1); |
1d31a253 | 2964 | spin_lock_init(&fp->fi_lock); |
32513b40 BF |
2965 | INIT_LIST_HEAD(&fp->fi_stateids); |
2966 | INIT_LIST_HEAD(&fp->fi_delegations); | |
e2cf80d7 | 2967 | fh_copy_shallow(&fp->fi_fhandle, fh); |
32513b40 BF |
2968 | fp->fi_had_conflict = false; |
2969 | fp->fi_lease = NULL; | |
baeb4ff0 | 2970 | fp->fi_share_deny = 0; |
32513b40 BF |
2971 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); |
2972 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
89876f8c | 2973 | hlist_add_head(&fp->fi_hash, &file_hashtbl[hashval]); |
1da177e4 LT |
2974 | } |
2975 | ||
e8ff2a84 | 2976 | void |
1da177e4 LT |
2977 | nfsd4_free_slabs(void) |
2978 | { | |
abf1135b CH |
2979 | kmem_cache_destroy(openowner_slab); |
2980 | kmem_cache_destroy(lockowner_slab); | |
2981 | kmem_cache_destroy(file_slab); | |
2982 | kmem_cache_destroy(stateid_slab); | |
2983 | kmem_cache_destroy(deleg_slab); | |
e60d4398 | 2984 | } |
1da177e4 | 2985 | |
72083396 | 2986 | int |
e60d4398 N |
2987 | nfsd4_init_slabs(void) |
2988 | { | |
fe0750e5 BF |
2989 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
2990 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2991 | if (openowner_slab == NULL) | |
abf1135b | 2992 | goto out; |
fe0750e5 | 2993 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", |
3c40794b | 2994 | sizeof(struct nfs4_lockowner), 0, 0, NULL); |
fe0750e5 | 2995 | if (lockowner_slab == NULL) |
abf1135b | 2996 | goto out_free_openowner_slab; |
e60d4398 | 2997 | file_slab = kmem_cache_create("nfsd4_files", |
20c2df83 | 2998 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 | 2999 | if (file_slab == NULL) |
abf1135b | 3000 | goto out_free_lockowner_slab; |
5ac049ac | 3001 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
dcef0413 | 3002 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
5ac049ac | 3003 | if (stateid_slab == NULL) |
abf1135b | 3004 | goto out_free_file_slab; |
5b2d21c1 | 3005 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 3006 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 | 3007 | if (deleg_slab == NULL) |
abf1135b | 3008 | goto out_free_stateid_slab; |
e60d4398 | 3009 | return 0; |
abf1135b CH |
3010 | |
3011 | out_free_stateid_slab: | |
3012 | kmem_cache_destroy(stateid_slab); | |
3013 | out_free_file_slab: | |
3014 | kmem_cache_destroy(file_slab); | |
3015 | out_free_lockowner_slab: | |
3016 | kmem_cache_destroy(lockowner_slab); | |
3017 | out_free_openowner_slab: | |
3018 | kmem_cache_destroy(openowner_slab); | |
3019 | out: | |
e60d4398 N |
3020 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); |
3021 | return -ENOMEM; | |
1da177e4 LT |
3022 | } |
3023 | ||
ff194bd9 | 3024 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 3025 | { |
ff194bd9 BF |
3026 | rp->rp_status = nfserr_serverfault; |
3027 | rp->rp_buflen = 0; | |
3028 | rp->rp_buf = rp->rp_ibuf; | |
58fb12e6 JL |
3029 | mutex_init(&rp->rp_mutex); |
3030 | } | |
3031 | ||
3032 | static void nfsd4_cstate_assign_replay(struct nfsd4_compound_state *cstate, | |
3033 | struct nfs4_stateowner *so) | |
3034 | { | |
3035 | if (!nfsd4_has_session(cstate)) { | |
3036 | mutex_lock(&so->so_replay.rp_mutex); | |
3037 | cstate->replay_owner = so; | |
3038 | atomic_inc(&so->so_count); | |
3039 | } | |
3040 | } | |
3041 | ||
3042 | void nfsd4_cstate_clear_replay(struct nfsd4_compound_state *cstate) | |
3043 | { | |
3044 | struct nfs4_stateowner *so = cstate->replay_owner; | |
3045 | ||
3046 | if (so != NULL) { | |
3047 | cstate->replay_owner = NULL; | |
3048 | mutex_unlock(&so->so_replay.rp_mutex); | |
3049 | nfs4_put_stateowner(so); | |
3050 | } | |
1da177e4 LT |
3051 | } |
3052 | ||
fe0750e5 | 3053 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 3054 | { |
1da177e4 | 3055 | struct nfs4_stateowner *sop; |
1da177e4 | 3056 | |
fe0750e5 | 3057 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
3058 | if (!sop) |
3059 | return NULL; | |
3060 | ||
3061 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); | |
3062 | if (!sop->so_owner.data) { | |
fe0750e5 | 3063 | kmem_cache_free(slab, sop); |
1da177e4 | 3064 | return NULL; |
ff194bd9 BF |
3065 | } |
3066 | sop->so_owner.len = owner->len; | |
3067 | ||
ea1da636 | 3068 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 BF |
3069 | sop->so_client = clp; |
3070 | init_nfs4_replay(&sop->so_replay); | |
6b180f0b | 3071 | atomic_set(&sop->so_count, 1); |
ff194bd9 BF |
3072 | return sop; |
3073 | } | |
3074 | ||
fe0750e5 | 3075 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 | 3076 | { |
d4f0489f | 3077 | lockdep_assert_held(&clp->cl_lock); |
9b531137 | 3078 | |
d4f0489f TM |
3079 | list_add(&oo->oo_owner.so_strhash, |
3080 | &clp->cl_ownerstr_hashtbl[strhashval]); | |
fe0750e5 | 3081 | list_add(&oo->oo_perclient, &clp->cl_openowners); |
ff194bd9 BF |
3082 | } |
3083 | ||
8f4b54c5 JL |
3084 | static void nfs4_unhash_openowner(struct nfs4_stateowner *so) |
3085 | { | |
d4f0489f | 3086 | unhash_openowner_locked(openowner(so)); |
8f4b54c5 JL |
3087 | } |
3088 | ||
6b180f0b JL |
3089 | static void nfs4_free_openowner(struct nfs4_stateowner *so) |
3090 | { | |
3091 | struct nfs4_openowner *oo = openowner(so); | |
3092 | ||
3093 | kmem_cache_free(openowner_slab, oo); | |
3094 | } | |
3095 | ||
3096 | static const struct nfs4_stateowner_operations openowner_ops = { | |
8f4b54c5 JL |
3097 | .so_unhash = nfs4_unhash_openowner, |
3098 | .so_free = nfs4_free_openowner, | |
6b180f0b JL |
3099 | }; |
3100 | ||
fe0750e5 | 3101 | static struct nfs4_openowner * |
13d6f66b | 3102 | alloc_init_open_stateowner(unsigned int strhashval, struct nfsd4_open *open, |
db24b3b4 JL |
3103 | struct nfsd4_compound_state *cstate) |
3104 | { | |
13d6f66b | 3105 | struct nfs4_client *clp = cstate->clp; |
7ffb5880 | 3106 | struct nfs4_openowner *oo, *ret; |
ff194bd9 | 3107 | |
fe0750e5 BF |
3108 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
3109 | if (!oo) | |
ff194bd9 | 3110 | return NULL; |
6b180f0b | 3111 | oo->oo_owner.so_ops = &openowner_ops; |
fe0750e5 BF |
3112 | oo->oo_owner.so_is_open_owner = 1; |
3113 | oo->oo_owner.so_seqid = open->op_seqid; | |
d3134b10 | 3114 | oo->oo_flags = 0; |
db24b3b4 JL |
3115 | if (nfsd4_has_session(cstate)) |
3116 | oo->oo_flags |= NFS4_OO_CONFIRMED; | |
fe0750e5 | 3117 | oo->oo_time = 0; |
38c387b5 | 3118 | oo->oo_last_closed_stid = NULL; |
fe0750e5 | 3119 | INIT_LIST_HEAD(&oo->oo_close_lru); |
d4f0489f TM |
3120 | spin_lock(&clp->cl_lock); |
3121 | ret = find_openstateowner_str_locked(strhashval, open, clp); | |
7ffb5880 TM |
3122 | if (ret == NULL) { |
3123 | hash_openowner(oo, clp, strhashval); | |
3124 | ret = oo; | |
3125 | } else | |
3126 | nfs4_free_openowner(&oo->oo_owner); | |
d4f0489f | 3127 | spin_unlock(&clp->cl_lock); |
fe0750e5 | 3128 | return oo; |
1da177e4 LT |
3129 | } |
3130 | ||
996e0938 | 3131 | static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { |
fe0750e5 | 3132 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 3133 | |
d6f2bc5d | 3134 | atomic_inc(&stp->st_stid.sc_count); |
3abdb607 | 3135 | stp->st_stid.sc_type = NFS4_OPEN_STID; |
3c87b9b7 | 3136 | INIT_LIST_HEAD(&stp->st_locks); |
fe0750e5 | 3137 | stp->st_stateowner = &oo->oo_owner; |
d3134b10 | 3138 | atomic_inc(&stp->st_stateowner->so_count); |
13cd2184 | 3139 | get_nfs4_file(fp); |
11b9164a | 3140 | stp->st_stid.sc_file = fp; |
1da177e4 LT |
3141 | stp->st_access_bmap = 0; |
3142 | stp->st_deny_bmap = 0; | |
4c4cd222 | 3143 | stp->st_openstp = NULL; |
1c755dc1 JL |
3144 | spin_lock(&oo->oo_owner.so_client->cl_lock); |
3145 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); | |
1d31a253 TM |
3146 | spin_lock(&fp->fi_lock); |
3147 | list_add(&stp->st_perfile, &fp->fi_stateids); | |
3148 | spin_unlock(&fp->fi_lock); | |
1c755dc1 | 3149 | spin_unlock(&oo->oo_owner.so_client->cl_lock); |
1da177e4 LT |
3150 | } |
3151 | ||
d3134b10 JL |
3152 | /* |
3153 | * In the 4.0 case we need to keep the owners around a little while to handle | |
3154 | * CLOSE replay. We still do need to release any file access that is held by | |
3155 | * them before returning however. | |
3156 | */ | |
fd39ca9a | 3157 | static void |
d3134b10 | 3158 | move_to_close_lru(struct nfs4_ol_stateid *s, struct net *net) |
1da177e4 | 3159 | { |
d3134b10 JL |
3160 | struct nfs4_openowner *oo = openowner(s->st_stateowner); |
3161 | struct nfsd_net *nn = net_generic(s->st_stid.sc_client->net, | |
3162 | nfsd_net_id); | |
73758fed | 3163 | |
fe0750e5 | 3164 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 3165 | |
b401be22 JL |
3166 | /* |
3167 | * We know that we hold one reference via nfsd4_close, and another | |
3168 | * "persistent" reference for the client. If the refcount is higher | |
3169 | * than 2, then there are still calls in progress that are using this | |
3170 | * stateid. We can't put the sc_file reference until they are finished. | |
3171 | * Wait for the refcount to drop to 2. Since it has been unhashed, | |
3172 | * there should be no danger of the refcount going back up again at | |
3173 | * this point. | |
3174 | */ | |
3175 | wait_event(close_wq, atomic_read(&s->st_stid.sc_count) == 2); | |
3176 | ||
d3134b10 JL |
3177 | release_all_access(s); |
3178 | if (s->st_stid.sc_file) { | |
3179 | put_nfs4_file(s->st_stid.sc_file); | |
3180 | s->st_stid.sc_file = NULL; | |
3181 | } | |
3182 | release_last_closed_stateid(oo); | |
3183 | oo->oo_last_closed_stid = s; | |
73758fed | 3184 | list_move_tail(&oo->oo_close_lru, &nn->close_lru); |
fe0750e5 | 3185 | oo->oo_time = get_seconds(); |
1da177e4 LT |
3186 | } |
3187 | ||
1da177e4 LT |
3188 | /* search file_hashtbl[] for file */ |
3189 | static struct nfs4_file * | |
ca943217 | 3190 | find_file_locked(struct knfsd_fh *fh) |
1da177e4 | 3191 | { |
ca943217 | 3192 | unsigned int hashval = file_hashval(fh); |
1da177e4 LT |
3193 | struct nfs4_file *fp; |
3194 | ||
950e0118 TM |
3195 | lockdep_assert_held(&state_lock); |
3196 | ||
89876f8c | 3197 | hlist_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
ca943217 | 3198 | if (nfsd_fh_match(&fp->fi_fhandle, fh)) { |
13cd2184 | 3199 | get_nfs4_file(fp); |
1da177e4 | 3200 | return fp; |
13cd2184 | 3201 | } |
1da177e4 LT |
3202 | } |
3203 | return NULL; | |
3204 | } | |
3205 | ||
950e0118 | 3206 | static struct nfs4_file * |
ca943217 | 3207 | find_file(struct knfsd_fh *fh) |
950e0118 TM |
3208 | { |
3209 | struct nfs4_file *fp; | |
3210 | ||
3211 | spin_lock(&state_lock); | |
ca943217 | 3212 | fp = find_file_locked(fh); |
950e0118 TM |
3213 | spin_unlock(&state_lock); |
3214 | return fp; | |
3215 | } | |
3216 | ||
3217 | static struct nfs4_file * | |
f9c00c3a | 3218 | find_or_add_file(struct nfs4_file *new, struct knfsd_fh *fh) |
950e0118 TM |
3219 | { |
3220 | struct nfs4_file *fp; | |
3221 | ||
3222 | spin_lock(&state_lock); | |
ca943217 | 3223 | fp = find_file_locked(fh); |
950e0118 | 3224 | if (fp == NULL) { |
f9c00c3a | 3225 | nfsd4_init_file(new, fh); |
950e0118 TM |
3226 | fp = new; |
3227 | } | |
3228 | spin_unlock(&state_lock); | |
3229 | ||
3230 | return fp; | |
3231 | } | |
3232 | ||
1da177e4 LT |
3233 | /* |
3234 | * Called to check deny when READ with all zero stateid or | |
3235 | * WRITE with all zero or all one stateid | |
3236 | */ | |
b37ad28b | 3237 | static __be32 |
1da177e4 LT |
3238 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
3239 | { | |
1da177e4 | 3240 | struct nfs4_file *fp; |
baeb4ff0 | 3241 | __be32 ret = nfs_ok; |
1da177e4 | 3242 | |
ca943217 | 3243 | fp = find_file(¤t_fh->fh_handle); |
13cd2184 | 3244 | if (!fp) |
baeb4ff0 JL |
3245 | return ret; |
3246 | /* Check for conflicting share reservations */ | |
1d31a253 | 3247 | spin_lock(&fp->fi_lock); |
baeb4ff0 JL |
3248 | if (fp->fi_share_deny & deny_type) |
3249 | ret = nfserr_locked; | |
1d31a253 | 3250 | spin_unlock(&fp->fi_lock); |
13cd2184 N |
3251 | put_nfs4_file(fp); |
3252 | return ret; | |
1da177e4 LT |
3253 | } |
3254 | ||
02e1215f | 3255 | void nfsd4_prepare_cb_recall(struct nfs4_delegation *dp) |
1da177e4 | 3256 | { |
11b9164a TM |
3257 | struct nfsd_net *nn = net_generic(dp->dl_stid.sc_client->net, |
3258 | nfsd_net_id); | |
e8c69d17 | 3259 | |
11b9164a | 3260 | block_delegations(&dp->dl_stid.sc_file->fi_fhandle); |
f54fe962 | 3261 | |
dff1399f | 3262 | /* |
f54fe962 JL |
3263 | * We can't do this in nfsd_break_deleg_cb because it is |
3264 | * already holding inode->i_lock. | |
3265 | * | |
dff1399f JL |
3266 | * If the dl_time != 0, then we know that it has already been |
3267 | * queued for a lease break. Don't queue it again. | |
3268 | */ | |
f54fe962 | 3269 | spin_lock(&state_lock); |
dff1399f | 3270 | if (dp->dl_time == 0) { |
dff1399f | 3271 | dp->dl_time = get_seconds(); |
02e1215f | 3272 | list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru); |
dff1399f | 3273 | } |
02e1215f JL |
3274 | spin_unlock(&state_lock); |
3275 | } | |
1da177e4 | 3276 | |
02e1215f JL |
3277 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
3278 | { | |
3279 | /* | |
3280 | * We're assuming the state code never drops its reference | |
3281 | * without first removing the lease. Since we're in this lease | |
3282 | * callback (and since the lease code is serialized by the kernel | |
3283 | * lock) we know the server hasn't removed the lease yet, we know | |
3284 | * it's safe to take a reference. | |
3285 | */ | |
72c0b0fb | 3286 | atomic_inc(&dp->dl_stid.sc_count); |
6b57d9c8 BF |
3287 | nfsd4_cb_recall(dp); |
3288 | } | |
3289 | ||
1c8c601a | 3290 | /* Called from break_lease() with i_lock held. */ |
6b57d9c8 BF |
3291 | static void nfsd_break_deleg_cb(struct file_lock *fl) |
3292 | { | |
acfdf5c3 BF |
3293 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
3294 | struct nfs4_delegation *dp; | |
6b57d9c8 | 3295 | |
7fa10cd1 BF |
3296 | if (!fp) { |
3297 | WARN(1, "(%p)->fl_owner NULL\n", fl); | |
3298 | return; | |
3299 | } | |
3300 | if (fp->fi_had_conflict) { | |
3301 | WARN(1, "duplicate break on %p\n", fp); | |
3302 | return; | |
3303 | } | |
0272e1fd BF |
3304 | /* |
3305 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 3306 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 3307 | * in time: |
0272e1fd BF |
3308 | */ |
3309 | fl->fl_break_time = 0; | |
1da177e4 | 3310 | |
02e1215f | 3311 | spin_lock(&fp->fi_lock); |
417c6629 JL |
3312 | fp->fi_had_conflict = true; |
3313 | /* | |
3314 | * If there are no delegations on the list, then we can't count on this | |
3315 | * lease ever being cleaned up. Set the fl_break_time to jiffies so that | |
3316 | * time_out_leases will do it ASAP. The fact that fi_had_conflict is now | |
3317 | * true should keep any new delegations from being hashed. | |
3318 | */ | |
3319 | if (list_empty(&fp->fi_delegations)) | |
3320 | fl->fl_break_time = jiffies; | |
3321 | else | |
3322 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
3323 | nfsd_break_one_deleg(dp); | |
02e1215f | 3324 | spin_unlock(&fp->fi_lock); |
1da177e4 LT |
3325 | } |
3326 | ||
1da177e4 LT |
3327 | static |
3328 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
3329 | { | |
3330 | if (arg & F_UNLCK) | |
3331 | return lease_modify(onlist, arg); | |
3332 | else | |
3333 | return -EAGAIN; | |
3334 | } | |
3335 | ||
7b021967 | 3336 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
3337 | .lm_break = nfsd_break_deleg_cb, |
3338 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
3339 | }; |
3340 | ||
7a8711c9 BF |
3341 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
3342 | { | |
3343 | if (nfsd4_has_session(cstate)) | |
3344 | return nfs_ok; | |
3345 | if (seqid == so->so_seqid - 1) | |
3346 | return nfserr_replay_me; | |
3347 | if (seqid == so->so_seqid) | |
3348 | return nfs_ok; | |
3349 | return nfserr_bad_seqid; | |
3350 | } | |
1da177e4 | 3351 | |
4b24ca7d JL |
3352 | static __be32 lookup_clientid(clientid_t *clid, |
3353 | struct nfsd4_compound_state *cstate, | |
3354 | struct nfsd_net *nn) | |
3355 | { | |
3356 | struct nfs4_client *found; | |
3357 | ||
3358 | if (cstate->clp) { | |
3359 | found = cstate->clp; | |
3360 | if (!same_clid(&found->cl_clientid, clid)) | |
3361 | return nfserr_stale_clientid; | |
3362 | return nfs_ok; | |
3363 | } | |
3364 | ||
3365 | if (STALE_CLIENTID(clid, nn)) | |
3366 | return nfserr_stale_clientid; | |
3367 | ||
3368 | /* | |
3369 | * For v4.1+ we get the client in the SEQUENCE op. If we don't have one | |
3370 | * cached already then we know this is for is for v4.0 and "sessions" | |
3371 | * will be false. | |
3372 | */ | |
3373 | WARN_ON_ONCE(cstate->session); | |
3374 | found = find_confirmed_client(clid, false, nn); | |
3375 | if (!found) | |
3376 | return nfserr_expired; | |
3377 | ||
3378 | /* Cache the nfs4_client in cstate! */ | |
3379 | cstate->clp = found; | |
3380 | atomic_inc(&found->cl_refcount); | |
3381 | return nfs_ok; | |
3382 | } | |
3383 | ||
b37ad28b | 3384 | __be32 |
6668958f | 3385 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
3320fef1 | 3386 | struct nfsd4_open *open, struct nfsd_net *nn) |
1da177e4 | 3387 | { |
1da177e4 LT |
3388 | clientid_t *clientid = &open->op_clientid; |
3389 | struct nfs4_client *clp = NULL; | |
3390 | unsigned int strhashval; | |
fe0750e5 | 3391 | struct nfs4_openowner *oo = NULL; |
4cdc951b | 3392 | __be32 status; |
1da177e4 | 3393 | |
2c142baa | 3394 | if (STALE_CLIENTID(&open->op_clientid, nn)) |
1da177e4 | 3395 | return nfserr_stale_clientid; |
32513b40 BF |
3396 | /* |
3397 | * In case we need it later, after we've already created the | |
3398 | * file and don't want to risk a further failure: | |
3399 | */ | |
3400 | open->op_file = nfsd4_alloc_file(); | |
3401 | if (open->op_file == NULL) | |
3402 | return nfserr_jukebox; | |
1da177e4 | 3403 | |
2d91e895 TM |
3404 | status = lookup_clientid(clientid, cstate, nn); |
3405 | if (status) | |
3406 | return status; | |
3407 | clp = cstate->clp; | |
3408 | ||
d4f0489f TM |
3409 | strhashval = ownerstr_hashval(&open->op_owner); |
3410 | oo = find_openstateowner_str(strhashval, open, clp); | |
fe0750e5 BF |
3411 | open->op_openowner = oo; |
3412 | if (!oo) { | |
bcf130f9 | 3413 | goto new_owner; |
1da177e4 | 3414 | } |
dad1c067 | 3415 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
0f442aa2 | 3416 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
3417 | release_openowner(oo); |
3418 | open->op_openowner = NULL; | |
bcf130f9 | 3419 | goto new_owner; |
0f442aa2 | 3420 | } |
4cdc951b BF |
3421 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
3422 | if (status) | |
3423 | return status; | |
4cdc951b | 3424 | goto alloc_stateid; |
bcf130f9 | 3425 | new_owner: |
13d6f66b | 3426 | oo = alloc_init_open_stateowner(strhashval, open, cstate); |
bcf130f9 BF |
3427 | if (oo == NULL) |
3428 | return nfserr_jukebox; | |
3429 | open->op_openowner = oo; | |
4cdc951b | 3430 | alloc_stateid: |
b49e084d | 3431 | open->op_stp = nfs4_alloc_open_stateid(clp); |
4cdc951b BF |
3432 | if (!open->op_stp) |
3433 | return nfserr_jukebox; | |
0f442aa2 | 3434 | return nfs_ok; |
1da177e4 LT |
3435 | } |
3436 | ||
b37ad28b | 3437 | static inline __be32 |
4a6e43e6 N |
3438 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
3439 | { | |
3440 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
3441 | return nfserr_openmode; | |
3442 | else | |
3443 | return nfs_ok; | |
3444 | } | |
3445 | ||
f459e453 | 3446 | static int share_access_to_flags(u32 share_access) |
52f4fb43 | 3447 | { |
f459e453 | 3448 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
52f4fb43 N |
3449 | } |
3450 | ||
38c2f4b1 | 3451 | static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) |
24a0111e | 3452 | { |
f459e453 | 3453 | struct nfs4_stid *ret; |
24a0111e | 3454 | |
38c2f4b1 | 3455 | ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); |
f459e453 BF |
3456 | if (!ret) |
3457 | return NULL; | |
3458 | return delegstateid(ret); | |
24a0111e BF |
3459 | } |
3460 | ||
8b289b2c BF |
3461 | static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) |
3462 | { | |
3463 | return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || | |
3464 | open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; | |
3465 | } | |
3466 | ||
b37ad28b | 3467 | static __be32 |
41d22663 | 3468 | nfs4_check_deleg(struct nfs4_client *cl, struct nfsd4_open *open, |
567d9829 N |
3469 | struct nfs4_delegation **dp) |
3470 | { | |
3471 | int flags; | |
b37ad28b | 3472 | __be32 status = nfserr_bad_stateid; |
dcd94cc2 | 3473 | struct nfs4_delegation *deleg; |
567d9829 | 3474 | |
dcd94cc2 TM |
3475 | deleg = find_deleg_stateid(cl, &open->op_delegate_stateid); |
3476 | if (deleg == NULL) | |
c44c5eeb | 3477 | goto out; |
24a0111e | 3478 | flags = share_access_to_flags(open->op_share_access); |
dcd94cc2 TM |
3479 | status = nfs4_check_delegmode(deleg, flags); |
3480 | if (status) { | |
3481 | nfs4_put_stid(&deleg->dl_stid); | |
3482 | goto out; | |
3483 | } | |
3484 | *dp = deleg; | |
c44c5eeb | 3485 | out: |
8b289b2c | 3486 | if (!nfsd4_is_deleg_cur(open)) |
c44c5eeb N |
3487 | return nfs_ok; |
3488 | if (status) | |
3489 | return status; | |
dad1c067 | 3490 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
c44c5eeb | 3491 | return nfs_ok; |
567d9829 N |
3492 | } |
3493 | ||
a46cb7f2 JL |
3494 | static struct nfs4_ol_stateid * |
3495 | nfsd4_find_existing_open(struct nfs4_file *fp, struct nfsd4_open *open) | |
1da177e4 | 3496 | { |
a46cb7f2 | 3497 | struct nfs4_ol_stateid *local, *ret = NULL; |
fe0750e5 | 3498 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 3499 | |
1d31a253 | 3500 | spin_lock(&fp->fi_lock); |
8beefa24 | 3501 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
3502 | /* ignore lock owners */ |
3503 | if (local->st_stateowner->so_is_open_owner == 0) | |
3504 | continue; | |
baeb4ff0 | 3505 | if (local->st_stateowner == &oo->oo_owner) { |
a46cb7f2 | 3506 | ret = local; |
d6f2bc5d | 3507 | atomic_inc(&ret->st_stid.sc_count); |
baeb4ff0 | 3508 | break; |
1d31a253 | 3509 | } |
1da177e4 | 3510 | } |
1d31a253 | 3511 | spin_unlock(&fp->fi_lock); |
a46cb7f2 | 3512 | return ret; |
1da177e4 LT |
3513 | } |
3514 | ||
21fb4016 BF |
3515 | static inline int nfs4_access_to_access(u32 nfs4_access) |
3516 | { | |
3517 | int flags = 0; | |
3518 | ||
3519 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
3520 | flags |= NFSD_MAY_READ; | |
3521 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
3522 | flags |= NFSD_MAY_WRITE; | |
3523 | return flags; | |
3524 | } | |
3525 | ||
7e6a72e5 CH |
3526 | static inline __be32 |
3527 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, | |
3528 | struct nfsd4_open *open) | |
3529 | { | |
3530 | struct iattr iattr = { | |
3531 | .ia_valid = ATTR_SIZE, | |
3532 | .ia_size = 0, | |
3533 | }; | |
3534 | if (!open->op_truncate) | |
3535 | return 0; | |
3536 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
3537 | return nfserr_inval; | |
3538 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); | |
3539 | } | |
3540 | ||
0c12eaff | 3541 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
6eb3a1d0 JL |
3542 | struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp, |
3543 | struct nfsd4_open *open) | |
f9d7562f | 3544 | { |
de18643d | 3545 | struct file *filp = NULL; |
f9d7562f | 3546 | __be32 status; |
0c12eaff CB |
3547 | int oflag = nfs4_access_to_omode(open->op_share_access); |
3548 | int access = nfs4_access_to_access(open->op_share_access); | |
baeb4ff0 | 3549 | unsigned char old_access_bmap, old_deny_bmap; |
0c12eaff | 3550 | |
de18643d | 3551 | spin_lock(&fp->fi_lock); |
baeb4ff0 JL |
3552 | |
3553 | /* | |
3554 | * Are we trying to set a deny mode that would conflict with | |
3555 | * current access? | |
3556 | */ | |
3557 | status = nfs4_file_check_deny(fp, open->op_share_deny); | |
3558 | if (status != nfs_ok) { | |
3559 | spin_unlock(&fp->fi_lock); | |
3560 | goto out; | |
3561 | } | |
3562 | ||
3563 | /* set access to the file */ | |
3564 | status = nfs4_file_get_access(fp, open->op_share_access); | |
3565 | if (status != nfs_ok) { | |
3566 | spin_unlock(&fp->fi_lock); | |
3567 | goto out; | |
3568 | } | |
3569 | ||
3570 | /* Set access bits in stateid */ | |
3571 | old_access_bmap = stp->st_access_bmap; | |
3572 | set_access(open->op_share_access, stp); | |
3573 | ||
3574 | /* Set new deny mask */ | |
3575 | old_deny_bmap = stp->st_deny_bmap; | |
3576 | set_deny(open->op_share_deny, stp); | |
3577 | fp->fi_share_deny |= (open->op_share_deny & NFS4_SHARE_DENY_BOTH); | |
3578 | ||
f9d7562f | 3579 | if (!fp->fi_fds[oflag]) { |
de18643d TM |
3580 | spin_unlock(&fp->fi_lock); |
3581 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, &filp); | |
f9d7562f | 3582 | if (status) |
baeb4ff0 | 3583 | goto out_put_access; |
de18643d TM |
3584 | spin_lock(&fp->fi_lock); |
3585 | if (!fp->fi_fds[oflag]) { | |
3586 | fp->fi_fds[oflag] = filp; | |
3587 | filp = NULL; | |
3588 | } | |
f9d7562f | 3589 | } |
de18643d TM |
3590 | spin_unlock(&fp->fi_lock); |
3591 | if (filp) | |
3592 | fput(filp); | |
f9d7562f | 3593 | |
7e6a72e5 CH |
3594 | status = nfsd4_truncate(rqstp, cur_fh, open); |
3595 | if (status) | |
3596 | goto out_put_access; | |
7e6a72e5 CH |
3597 | out: |
3598 | return status; | |
baeb4ff0 JL |
3599 | out_put_access: |
3600 | stp->st_access_bmap = old_access_bmap; | |
3601 | nfs4_file_put_access(fp, open->op_share_access); | |
3602 | reset_union_bmap_deny(bmap_to_share_mode(old_deny_bmap), stp); | |
3603 | goto out; | |
1da177e4 LT |
3604 | } |
3605 | ||
b37ad28b | 3606 | static __be32 |
dcef0413 | 3607 | 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 | 3608 | { |
b37ad28b | 3609 | __be32 status; |
baeb4ff0 | 3610 | unsigned char old_deny_bmap; |
1da177e4 | 3611 | |
6eb3a1d0 | 3612 | if (!test_access(open->op_share_access, stp)) |
baeb4ff0 | 3613 | return nfs4_get_vfs_file(rqstp, fp, cur_fh, stp, open); |
7e6a72e5 | 3614 | |
baeb4ff0 JL |
3615 | /* test and set deny mode */ |
3616 | spin_lock(&fp->fi_lock); | |
3617 | status = nfs4_file_check_deny(fp, open->op_share_deny); | |
3618 | if (status == nfs_ok) { | |
3619 | old_deny_bmap = stp->st_deny_bmap; | |
3620 | set_deny(open->op_share_deny, stp); | |
3621 | fp->fi_share_deny |= | |
3622 | (open->op_share_deny & NFS4_SHARE_DENY_BOTH); | |
3623 | } | |
3624 | spin_unlock(&fp->fi_lock); | |
3625 | ||
3626 | if (status != nfs_ok) | |
1da177e4 | 3627 | return status; |
1da177e4 | 3628 | |
baeb4ff0 JL |
3629 | status = nfsd4_truncate(rqstp, cur_fh, open); |
3630 | if (status != nfs_ok) | |
3631 | reset_union_bmap_deny(old_deny_bmap, stp); | |
3632 | return status; | |
3633 | } | |
1da177e4 | 3634 | |
1da177e4 | 3635 | static void |
1255a8f3 | 3636 | nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session) |
1da177e4 | 3637 | { |
dad1c067 | 3638 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
1da177e4 LT |
3639 | } |
3640 | ||
14a24e99 BF |
3641 | /* Should we give out recallable state?: */ |
3642 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
3643 | { | |
3644 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
3645 | return true; | |
3646 | /* | |
3647 | * In the sessions case, since we don't have to establish a | |
3648 | * separate connection for callbacks, we assume it's OK | |
3649 | * until we hear otherwise: | |
3650 | */ | |
3651 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
3652 | } | |
3653 | ||
d564fbec | 3654 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_file *fp, int flag) |
22d38c4c BF |
3655 | { |
3656 | struct file_lock *fl; | |
3657 | ||
3658 | fl = locks_alloc_lock(); | |
3659 | if (!fl) | |
3660 | return NULL; | |
3661 | locks_init_lock(fl); | |
3662 | fl->fl_lmops = &nfsd_lease_mng_ops; | |
617588d5 | 3663 | fl->fl_flags = FL_DELEG; |
22d38c4c BF |
3664 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; |
3665 | fl->fl_end = OFFSET_MAX; | |
d564fbec | 3666 | fl->fl_owner = (fl_owner_t)fp; |
22d38c4c | 3667 | fl->fl_pid = current->tgid; |
22d38c4c BF |
3668 | return fl; |
3669 | } | |
3670 | ||
99c41515 | 3671 | static int nfs4_setlease(struct nfs4_delegation *dp) |
edab9782 | 3672 | { |
11b9164a | 3673 | struct nfs4_file *fp = dp->dl_stid.sc_file; |
edab9782 | 3674 | struct file_lock *fl; |
417c6629 JL |
3675 | struct file *filp; |
3676 | int status = 0; | |
edab9782 | 3677 | |
d564fbec | 3678 | fl = nfs4_alloc_init_lease(fp, NFS4_OPEN_DELEGATE_READ); |
edab9782 BF |
3679 | if (!fl) |
3680 | return -ENOMEM; | |
417c6629 JL |
3681 | filp = find_readable_file(fp); |
3682 | if (!filp) { | |
3683 | /* We should always have a readable file here */ | |
3684 | WARN_ON_ONCE(1); | |
3685 | return -EBADF; | |
3686 | } | |
3687 | fl->fl_file = filp; | |
3688 | status = vfs_setlease(filp, fl->fl_type, &fl); | |
3689 | if (status) { | |
3690 | locks_free_lock(fl); | |
3691 | goto out_fput; | |
3692 | } | |
3693 | spin_lock(&state_lock); | |
3694 | spin_lock(&fp->fi_lock); | |
3695 | /* Did the lease get broken before we took the lock? */ | |
3696 | status = -EAGAIN; | |
3697 | if (fp->fi_had_conflict) | |
3698 | goto out_unlock; | |
3699 | /* Race breaker */ | |
3700 | if (fp->fi_lease) { | |
3701 | status = 0; | |
3702 | atomic_inc(&fp->fi_delegees); | |
3703 | hash_delegation_locked(dp, fp); | |
3704 | goto out_unlock; | |
3705 | } | |
acfdf5c3 | 3706 | fp->fi_lease = fl; |
417c6629 | 3707 | fp->fi_deleg_file = filp; |
acfdf5c3 | 3708 | atomic_set(&fp->fi_delegees, 1); |
931ee56c | 3709 | hash_delegation_locked(dp, fp); |
417c6629 | 3710 | spin_unlock(&fp->fi_lock); |
cdc97505 | 3711 | spin_unlock(&state_lock); |
acfdf5c3 | 3712 | return 0; |
417c6629 JL |
3713 | out_unlock: |
3714 | spin_unlock(&fp->fi_lock); | |
3715 | spin_unlock(&state_lock); | |
3716 | out_fput: | |
3717 | fput(filp); | |
e873088f | 3718 | return status; |
acfdf5c3 BF |
3719 | } |
3720 | ||
0b26693c JL |
3721 | static struct nfs4_delegation * |
3722 | nfs4_set_delegation(struct nfs4_client *clp, struct svc_fh *fh, | |
3723 | struct nfs4_file *fp) | |
acfdf5c3 | 3724 | { |
0b26693c JL |
3725 | int status; |
3726 | struct nfs4_delegation *dp; | |
417c6629 | 3727 | |
bf7bd3e9 | 3728 | if (fp->fi_had_conflict) |
0b26693c JL |
3729 | return ERR_PTR(-EAGAIN); |
3730 | ||
3731 | dp = alloc_init_deleg(clp, fh); | |
3732 | if (!dp) | |
3733 | return ERR_PTR(-ENOMEM); | |
3734 | ||
bf7bd3e9 | 3735 | get_nfs4_file(fp); |
417c6629 JL |
3736 | spin_lock(&state_lock); |
3737 | spin_lock(&fp->fi_lock); | |
11b9164a | 3738 | dp->dl_stid.sc_file = fp; |
417c6629 JL |
3739 | if (!fp->fi_lease) { |
3740 | spin_unlock(&fp->fi_lock); | |
3741 | spin_unlock(&state_lock); | |
0b26693c JL |
3742 | status = nfs4_setlease(dp); |
3743 | goto out; | |
417c6629 | 3744 | } |
cbf7a75b | 3745 | atomic_inc(&fp->fi_delegees); |
acfdf5c3 | 3746 | if (fp->fi_had_conflict) { |
417c6629 JL |
3747 | status = -EAGAIN; |
3748 | goto out_unlock; | |
acfdf5c3 | 3749 | } |
931ee56c | 3750 | hash_delegation_locked(dp, fp); |
0b26693c | 3751 | status = 0; |
417c6629 JL |
3752 | out_unlock: |
3753 | spin_unlock(&fp->fi_lock); | |
cdc97505 | 3754 | spin_unlock(&state_lock); |
0b26693c JL |
3755 | out: |
3756 | if (status) { | |
6011695d | 3757 | nfs4_put_stid(&dp->dl_stid); |
0b26693c JL |
3758 | return ERR_PTR(status); |
3759 | } | |
3760 | return dp; | |
edab9782 BF |
3761 | } |
3762 | ||
4aa8913c BH |
3763 | static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) |
3764 | { | |
3765 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3766 | if (status == -EAGAIN) | |
3767 | open->op_why_no_deleg = WND4_CONTENTION; | |
3768 | else { | |
3769 | open->op_why_no_deleg = WND4_RESOURCE; | |
3770 | switch (open->op_deleg_want) { | |
3771 | case NFS4_SHARE_WANT_READ_DELEG: | |
3772 | case NFS4_SHARE_WANT_WRITE_DELEG: | |
3773 | case NFS4_SHARE_WANT_ANY_DELEG: | |
3774 | break; | |
3775 | case NFS4_SHARE_WANT_CANCEL: | |
3776 | open->op_why_no_deleg = WND4_CANCELLED; | |
3777 | break; | |
3778 | case NFS4_SHARE_WANT_NO_DELEG: | |
063b0fb9 | 3779 | WARN_ON_ONCE(1); |
4aa8913c BH |
3780 | } |
3781 | } | |
3782 | } | |
3783 | ||
1da177e4 LT |
3784 | /* |
3785 | * Attempt to hand out a delegation. | |
99c41515 BF |
3786 | * |
3787 | * Note we don't support write delegations, and won't until the vfs has | |
3788 | * proper support for them. | |
1da177e4 LT |
3789 | */ |
3790 | static void | |
4cf59221 JL |
3791 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, |
3792 | struct nfs4_ol_stateid *stp) | |
1da177e4 LT |
3793 | { |
3794 | struct nfs4_delegation *dp; | |
4cf59221 JL |
3795 | struct nfs4_openowner *oo = openowner(stp->st_stateowner); |
3796 | struct nfs4_client *clp = stp->st_stid.sc_client; | |
14a24e99 | 3797 | int cb_up; |
99c41515 | 3798 | int status = 0; |
1da177e4 | 3799 | |
fe0750e5 | 3800 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
7b190fec N |
3801 | open->op_recall = 0; |
3802 | switch (open->op_claim_type) { | |
3803 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 3804 | if (!cb_up) |
7b190fec | 3805 | open->op_recall = 1; |
99c41515 BF |
3806 | if (open->op_delegate_type != NFS4_OPEN_DELEGATE_READ) |
3807 | goto out_no_deleg; | |
7b190fec N |
3808 | break; |
3809 | case NFS4_OPEN_CLAIM_NULL: | |
ed47b062 | 3810 | case NFS4_OPEN_CLAIM_FH: |
99c41515 BF |
3811 | /* |
3812 | * Let's not give out any delegations till everyone's | |
3813 | * had the chance to reclaim theirs.... | |
3814 | */ | |
4cf59221 | 3815 | if (locks_in_grace(clp->net)) |
99c41515 | 3816 | goto out_no_deleg; |
dad1c067 | 3817 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
99c41515 | 3818 | goto out_no_deleg; |
9a0590ae SD |
3819 | /* |
3820 | * Also, if the file was opened for write or | |
3821 | * create, there's a good chance the client's | |
3822 | * about to write to it, resulting in an | |
3823 | * immediate recall (since we don't support | |
3824 | * write delegations): | |
3825 | */ | |
7b190fec | 3826 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
99c41515 BF |
3827 | goto out_no_deleg; |
3828 | if (open->op_create == NFS4_OPEN_CREATE) | |
3829 | goto out_no_deleg; | |
7b190fec N |
3830 | break; |
3831 | default: | |
99c41515 | 3832 | goto out_no_deleg; |
7b190fec | 3833 | } |
11b9164a | 3834 | dp = nfs4_set_delegation(clp, fh, stp->st_stid.sc_file); |
0b26693c | 3835 | if (IS_ERR(dp)) |
dd239cc0 | 3836 | goto out_no_deleg; |
1da177e4 | 3837 | |
d5477a8d | 3838 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 3839 | |
8c10cbdb | 3840 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
d5477a8d | 3841 | STATEID_VAL(&dp->dl_stid.sc_stateid)); |
99c41515 | 3842 | open->op_delegate_type = NFS4_OPEN_DELEGATE_READ; |
67cb1279 | 3843 | nfs4_put_stid(&dp->dl_stid); |
dd239cc0 | 3844 | return; |
dd239cc0 | 3845 | out_no_deleg: |
99c41515 BF |
3846 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE; |
3847 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && | |
d08d32e6 | 3848 | open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) { |
99c41515 | 3849 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
d08d32e6 BF |
3850 | open->op_recall = 1; |
3851 | } | |
99c41515 BF |
3852 | |
3853 | /* 4.1 client asking for a delegation? */ | |
3854 | if (open->op_deleg_want) | |
3855 | nfsd4_open_deleg_none_ext(open, status); | |
3856 | return; | |
1da177e4 LT |
3857 | } |
3858 | ||
e27f49c3 BH |
3859 | static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, |
3860 | struct nfs4_delegation *dp) | |
3861 | { | |
3862 | if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && | |
3863 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
3864 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3865 | open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; | |
3866 | } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && | |
3867 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
3868 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3869 | open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; | |
3870 | } | |
3871 | /* Otherwise the client must be confused wanting a delegation | |
3872 | * it already has, therefore we don't return | |
3873 | * NFS4_OPEN_DELEGATE_NONE_EXT and reason. | |
3874 | */ | |
3875 | } | |
3876 | ||
1da177e4 LT |
3877 | /* |
3878 | * called with nfs4_lock_state() held. | |
3879 | */ | |
b37ad28b | 3880 | __be32 |
1da177e4 LT |
3881 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
3882 | { | |
6668958f | 3883 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
38c2f4b1 | 3884 | struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; |
1da177e4 | 3885 | struct nfs4_file *fp = NULL; |
dcef0413 | 3886 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 3887 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 3888 | __be32 status; |
1da177e4 | 3889 | |
1da177e4 LT |
3890 | /* |
3891 | * Lookup file; if found, lookup stateid and check open request, | |
3892 | * and check for delegations in the process of being recalled. | |
3893 | * If not found, create the nfs4_file struct | |
3894 | */ | |
f9c00c3a | 3895 | fp = find_or_add_file(open->op_file, ¤t_fh->fh_handle); |
950e0118 | 3896 | if (fp != open->op_file) { |
41d22663 | 3897 | status = nfs4_check_deleg(cl, open, &dp); |
c44c5eeb N |
3898 | if (status) |
3899 | goto out; | |
a46cb7f2 | 3900 | stp = nfsd4_find_existing_open(fp, open); |
1da177e4 | 3901 | } else { |
950e0118 | 3902 | open->op_file = NULL; |
c44c5eeb | 3903 | status = nfserr_bad_stateid; |
8b289b2c | 3904 | if (nfsd4_is_deleg_cur(open)) |
c44c5eeb | 3905 | goto out; |
3e772463 | 3906 | status = nfserr_jukebox; |
1da177e4 LT |
3907 | } |
3908 | ||
3909 | /* | |
3910 | * OPEN the file, or upgrade an existing OPEN. | |
3911 | * If truncate fails, the OPEN fails. | |
3912 | */ | |
3913 | if (stp) { | |
3914 | /* Stateid was found, this is an OPEN upgrade */ | |
f9d7562f | 3915 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
1da177e4 LT |
3916 | if (status) |
3917 | goto out; | |
3918 | } else { | |
4cdc951b BF |
3919 | stp = open->op_stp; |
3920 | open->op_stp = NULL; | |
996e0938 | 3921 | init_open_stateid(stp, fp, open); |
6eb3a1d0 JL |
3922 | status = nfs4_get_vfs_file(rqstp, fp, current_fh, stp, open); |
3923 | if (status) { | |
3924 | release_open_stateid(stp); | |
3925 | goto out; | |
3926 | } | |
1da177e4 | 3927 | } |
dcef0413 BF |
3928 | update_stateid(&stp->st_stid.sc_stateid); |
3929 | memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3930 | |
d24433cd | 3931 | if (nfsd4_has_session(&resp->cstate)) { |
d24433cd BH |
3932 | if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { |
3933 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3934 | open->op_why_no_deleg = WND4_NOT_WANTED; | |
3935 | goto nodeleg; | |
3936 | } | |
3937 | } | |
3938 | ||
1da177e4 LT |
3939 | /* |
3940 | * Attempt to hand out a delegation. No error return, because the | |
3941 | * OPEN succeeds even if we fail. | |
3942 | */ | |
4cf59221 | 3943 | nfs4_open_delegation(current_fh, open, stp); |
d24433cd | 3944 | nodeleg: |
1da177e4 LT |
3945 | status = nfs_ok; |
3946 | ||
8c10cbdb | 3947 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
dcef0413 | 3948 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
1da177e4 | 3949 | out: |
d24433cd BH |
3950 | /* 4.1 client trying to upgrade/downgrade delegation? */ |
3951 | if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && | |
e27f49c3 BH |
3952 | open->op_deleg_want) |
3953 | nfsd4_deleg_xgrade_none_ext(open, dp); | |
d24433cd | 3954 | |
13cd2184 N |
3955 | if (fp) |
3956 | put_nfs4_file(fp); | |
37515177 | 3957 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
1255a8f3 | 3958 | nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate)); |
1da177e4 LT |
3959 | /* |
3960 | * To finish the open response, we just need to set the rflags. | |
3961 | */ | |
3962 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
dad1c067 | 3963 | if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && |
6668958f | 3964 | !nfsd4_has_session(&resp->cstate)) |
1da177e4 | 3965 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
dcd94cc2 TM |
3966 | if (dp) |
3967 | nfs4_put_stid(&dp->dl_stid); | |
d6f2bc5d TM |
3968 | if (stp) |
3969 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 LT |
3970 | |
3971 | return status; | |
3972 | } | |
3973 | ||
58fb12e6 JL |
3974 | void nfsd4_cleanup_open_state(struct nfsd4_compound_state *cstate, |
3975 | struct nfsd4_open *open, __be32 status) | |
d29b20cd BF |
3976 | { |
3977 | if (open->op_openowner) { | |
d3134b10 JL |
3978 | struct nfs4_stateowner *so = &open->op_openowner->oo_owner; |
3979 | ||
3980 | nfsd4_cstate_assign_replay(cstate, so); | |
3981 | nfs4_put_stateowner(so); | |
d29b20cd | 3982 | } |
32513b40 BF |
3983 | if (open->op_file) |
3984 | nfsd4_free_file(open->op_file); | |
4cdc951b | 3985 | if (open->op_stp) |
6011695d | 3986 | nfs4_put_stid(&open->op_stp->st_stid); |
d29b20cd BF |
3987 | } |
3988 | ||
b37ad28b | 3989 | __be32 |
b591480b BF |
3990 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3991 | clientid_t *clid) | |
1da177e4 LT |
3992 | { |
3993 | struct nfs4_client *clp; | |
b37ad28b | 3994 | __be32 status; |
7f2210fa | 3995 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
3996 | |
3997 | nfs4_lock_state(); | |
3998 | dprintk("process_renew(%08x/%08x): starting\n", | |
3999 | clid->cl_boot, clid->cl_id); | |
4b24ca7d | 4000 | status = lookup_clientid(clid, cstate, nn); |
9b2ef62b | 4001 | if (status) |
1da177e4 | 4002 | goto out; |
4b24ca7d | 4003 | clp = cstate->clp; |
1da177e4 | 4004 | status = nfserr_cb_path_down; |
ea1da636 | 4005 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 4006 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
4007 | goto out; |
4008 | status = nfs_ok; | |
4009 | out: | |
4010 | nfs4_unlock_state(); | |
4011 | return status; | |
4012 | } | |
4013 | ||
a76b4319 | 4014 | static void |
12760c66 | 4015 | nfsd4_end_grace(struct nfsd_net *nn) |
a76b4319 | 4016 | { |
33dcc481 | 4017 | /* do nothing if grace period already ended */ |
a51c84ed | 4018 | if (nn->grace_ended) |
33dcc481 JL |
4019 | return; |
4020 | ||
a76b4319 | 4021 | dprintk("NFSD: end of grace period\n"); |
a51c84ed | 4022 | nn->grace_ended = true; |
12760c66 | 4023 | nfsd4_record_grace_done(nn, nn->boot_time); |
5e1533c7 | 4024 | locks_end_grace(&nn->nfsd4_manager); |
e46b498c BF |
4025 | /* |
4026 | * Now that every NFSv4 client has had the chance to recover and | |
4027 | * to see the (possibly new, possibly shorter) lease time, we | |
4028 | * can safely set the next grace time to the current lease time: | |
4029 | */ | |
5284b44e | 4030 | nn->nfsd4_grace = nn->nfsd4_lease; |
a76b4319 N |
4031 | } |
4032 | ||
fd39ca9a | 4033 | static time_t |
09121281 | 4034 | nfs4_laundromat(struct nfsd_net *nn) |
1da177e4 LT |
4035 | { |
4036 | struct nfs4_client *clp; | |
fe0750e5 | 4037 | struct nfs4_openowner *oo; |
1da177e4 LT |
4038 | struct nfs4_delegation *dp; |
4039 | struct list_head *pos, *next, reaplist; | |
3d733711 | 4040 | time_t cutoff = get_seconds() - nn->nfsd4_lease; |
a832e7ae | 4041 | time_t t, new_timeo = nn->nfsd4_lease; |
1da177e4 LT |
4042 | |
4043 | nfs4_lock_state(); | |
4044 | ||
4045 | dprintk("NFSD: laundromat service - starting\n"); | |
12760c66 | 4046 | nfsd4_end_grace(nn); |
36acb66b | 4047 | INIT_LIST_HEAD(&reaplist); |
c9a49628 | 4048 | spin_lock(&nn->client_lock); |
5ed58bb2 | 4049 | list_for_each_safe(pos, next, &nn->client_lru) { |
1da177e4 LT |
4050 | clp = list_entry(pos, struct nfs4_client, cl_lru); |
4051 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
4052 | t = clp->cl_time - cutoff; | |
a832e7ae | 4053 | new_timeo = min(new_timeo, t); |
1da177e4 LT |
4054 | break; |
4055 | } | |
221a6876 | 4056 | if (mark_client_expired_locked(clp)) { |
d7682988 BH |
4057 | dprintk("NFSD: client in use (clientid %08x)\n", |
4058 | clp->cl_clientid.cl_id); | |
4059 | continue; | |
4060 | } | |
221a6876 | 4061 | list_move(&clp->cl_lru, &reaplist); |
36acb66b | 4062 | } |
c9a49628 | 4063 | spin_unlock(&nn->client_lock); |
36acb66b BH |
4064 | list_for_each_safe(pos, next, &reaplist) { |
4065 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
4066 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
4067 | clp->cl_clientid.cl_id); | |
4068 | expire_client(clp); | |
4069 | } | |
cdc97505 | 4070 | spin_lock(&state_lock); |
e8c69d17 | 4071 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 | 4072 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
4e37a7c2 SK |
4073 | if (net_generic(dp->dl_stid.sc_client->net, nfsd_net_id) != nn) |
4074 | continue; | |
1da177e4 | 4075 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { |
a832e7ae JL |
4076 | t = dp->dl_time - cutoff; |
4077 | new_timeo = min(new_timeo, t); | |
1da177e4 LT |
4078 | break; |
4079 | } | |
42690676 JL |
4080 | unhash_delegation_locked(dp); |
4081 | list_add(&dp->dl_recall_lru, &reaplist); | |
1da177e4 | 4082 | } |
cdc97505 | 4083 | spin_unlock(&state_lock); |
2d4a532d JL |
4084 | while (!list_empty(&reaplist)) { |
4085 | dp = list_first_entry(&reaplist, struct nfs4_delegation, | |
4086 | dl_recall_lru); | |
4087 | list_del_init(&dp->dl_recall_lru); | |
3bd64a5b | 4088 | revoke_delegation(dp); |
1da177e4 | 4089 | } |
73758fed | 4090 | list_for_each_safe(pos, next, &nn->close_lru) { |
fe0750e5 BF |
4091 | oo = container_of(pos, struct nfs4_openowner, oo_close_lru); |
4092 | if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { | |
a832e7ae JL |
4093 | t = oo->oo_time - cutoff; |
4094 | new_timeo = min(new_timeo, t); | |
1da177e4 LT |
4095 | break; |
4096 | } | |
d3134b10 | 4097 | release_last_closed_stateid(oo); |
1da177e4 | 4098 | } |
a832e7ae | 4099 | new_timeo = max_t(time_t, new_timeo, NFSD_LAUNDROMAT_MINTIMEOUT); |
1da177e4 | 4100 | nfs4_unlock_state(); |
a832e7ae | 4101 | return new_timeo; |
1da177e4 LT |
4102 | } |
4103 | ||
a254b246 HH |
4104 | static struct workqueue_struct *laundry_wq; |
4105 | static void laundromat_main(struct work_struct *); | |
a254b246 HH |
4106 | |
4107 | static void | |
09121281 | 4108 | laundromat_main(struct work_struct *laundry) |
1da177e4 LT |
4109 | { |
4110 | time_t t; | |
09121281 SK |
4111 | struct delayed_work *dwork = container_of(laundry, struct delayed_work, |
4112 | work); | |
4113 | struct nfsd_net *nn = container_of(dwork, struct nfsd_net, | |
4114 | laundromat_work); | |
1da177e4 | 4115 | |
09121281 | 4116 | t = nfs4_laundromat(nn); |
1da177e4 | 4117 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); |
09121281 | 4118 | queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ); |
1da177e4 LT |
4119 | } |
4120 | ||
f7a4d872 | 4121 | static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) |
1da177e4 | 4122 | { |
11b9164a | 4123 | if (!nfsd_fh_match(&fhp->fh_handle, &stp->st_stid.sc_file->fi_fhandle)) |
f7a4d872 BF |
4124 | return nfserr_bad_stateid; |
4125 | return nfs_ok; | |
1da177e4 LT |
4126 | } |
4127 | ||
1da177e4 | 4128 | static inline int |
82c5ff1b | 4129 | access_permit_read(struct nfs4_ol_stateid *stp) |
1da177e4 | 4130 | { |
82c5ff1b JL |
4131 | return test_access(NFS4_SHARE_ACCESS_READ, stp) || |
4132 | test_access(NFS4_SHARE_ACCESS_BOTH, stp) || | |
4133 | test_access(NFS4_SHARE_ACCESS_WRITE, stp); | |
1da177e4 LT |
4134 | } |
4135 | ||
4136 | static inline int | |
82c5ff1b | 4137 | access_permit_write(struct nfs4_ol_stateid *stp) |
1da177e4 | 4138 | { |
82c5ff1b JL |
4139 | return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || |
4140 | test_access(NFS4_SHARE_ACCESS_BOTH, stp); | |
1da177e4 LT |
4141 | } |
4142 | ||
4143 | static | |
dcef0413 | 4144 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
1da177e4 | 4145 | { |
b37ad28b | 4146 | __be32 status = nfserr_openmode; |
1da177e4 | 4147 | |
02921914 BF |
4148 | /* For lock stateid's, we test the parent open, not the lock: */ |
4149 | if (stp->st_openstp) | |
4150 | stp = stp->st_openstp; | |
82c5ff1b | 4151 | if ((flags & WR_STATE) && !access_permit_write(stp)) |
1da177e4 | 4152 | goto out; |
82c5ff1b | 4153 | if ((flags & RD_STATE) && !access_permit_read(stp)) |
1da177e4 LT |
4154 | goto out; |
4155 | status = nfs_ok; | |
4156 | out: | |
4157 | return status; | |
4158 | } | |
4159 | ||
b37ad28b | 4160 | static inline __be32 |
5ccb0066 | 4161 | check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags) |
1da177e4 | 4162 | { |
203a8c8e | 4163 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 4164 | return nfs_ok; |
5ccb0066 | 4165 | else if (locks_in_grace(net)) { |
25985edc | 4166 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
4167 | * conflicting state; so we must wait out the grace period. */ |
4168 | return nfserr_grace; | |
4169 | } else if (flags & WR_STATE) | |
4170 | return nfs4_share_conflict(current_fh, | |
4171 | NFS4_SHARE_DENY_WRITE); | |
4172 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
4173 | return nfs4_share_conflict(current_fh, | |
4174 | NFS4_SHARE_DENY_READ); | |
4175 | } | |
4176 | ||
4177 | /* | |
4178 | * Allow READ/WRITE during grace period on recovered state only for files | |
4179 | * that are not able to provide mandatory locking. | |
4180 | */ | |
4181 | static inline int | |
5ccb0066 | 4182 | grace_disallows_io(struct net *net, struct inode *inode) |
1da177e4 | 4183 | { |
5ccb0066 | 4184 | return locks_in_grace(net) && mandatory_lock(inode); |
1da177e4 LT |
4185 | } |
4186 | ||
81b82965 BF |
4187 | /* Returns true iff a is later than b: */ |
4188 | static bool stateid_generation_after(stateid_t *a, stateid_t *b) | |
4189 | { | |
1a9357f4 | 4190 | return (s32)(a->si_generation - b->si_generation) > 0; |
81b82965 BF |
4191 | } |
4192 | ||
57b7b43b | 4193 | static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 4194 | { |
6668958f AA |
4195 | /* |
4196 | * When sessions are used the stateid generation number is ignored | |
4197 | * when it is zero. | |
4198 | */ | |
28dde241 | 4199 | if (has_session && in->si_generation == 0) |
81b82965 BF |
4200 | return nfs_ok; |
4201 | ||
4202 | if (in->si_generation == ref->si_generation) | |
4203 | return nfs_ok; | |
6668958f | 4204 | |
0836f587 | 4205 | /* If the client sends us a stateid from the future, it's buggy: */ |
81b82965 | 4206 | if (stateid_generation_after(in, ref)) |
0836f587 BF |
4207 | return nfserr_bad_stateid; |
4208 | /* | |
81b82965 BF |
4209 | * However, we could see a stateid from the past, even from a |
4210 | * non-buggy client. For example, if the client sends a lock | |
4211 | * while some IO is outstanding, the lock may bump si_generation | |
4212 | * while the IO is still in flight. The client could avoid that | |
4213 | * situation by waiting for responses on all the IO requests, | |
4214 | * but better performance may result in retrying IO that | |
4215 | * receives an old_stateid error if requests are rarely | |
4216 | * reordered in flight: | |
0836f587 | 4217 | */ |
81b82965 | 4218 | return nfserr_old_stateid; |
0836f587 BF |
4219 | } |
4220 | ||
7df302f7 | 4221 | static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) |
17456804 | 4222 | { |
97b7e3b6 BF |
4223 | struct nfs4_stid *s; |
4224 | struct nfs4_ol_stateid *ols; | |
1af71cc8 | 4225 | __be32 status = nfserr_bad_stateid; |
17456804 | 4226 | |
7df302f7 | 4227 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
1af71cc8 | 4228 | return status; |
7df302f7 CL |
4229 | /* Client debugging aid. */ |
4230 | if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) { | |
4231 | char addr_str[INET6_ADDRSTRLEN]; | |
4232 | rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str, | |
4233 | sizeof(addr_str)); | |
4234 | pr_warn_ratelimited("NFSD: client %s testing state ID " | |
4235 | "with incorrect client ID\n", addr_str); | |
1af71cc8 | 4236 | return status; |
7df302f7 | 4237 | } |
1af71cc8 JL |
4238 | spin_lock(&cl->cl_lock); |
4239 | s = find_stateid_locked(cl, stateid); | |
97b7e3b6 | 4240 | if (!s) |
1af71cc8 | 4241 | goto out_unlock; |
36279ac1 | 4242 | status = check_stateid_generation(stateid, &s->sc_stateid, 1); |
17456804 | 4243 | if (status) |
1af71cc8 | 4244 | goto out_unlock; |
23340032 BF |
4245 | switch (s->sc_type) { |
4246 | case NFS4_DELEG_STID: | |
1af71cc8 JL |
4247 | status = nfs_ok; |
4248 | break; | |
3bd64a5b | 4249 | case NFS4_REVOKED_DELEG_STID: |
1af71cc8 JL |
4250 | status = nfserr_deleg_revoked; |
4251 | break; | |
23340032 BF |
4252 | case NFS4_OPEN_STID: |
4253 | case NFS4_LOCK_STID: | |
4254 | ols = openlockstateid(s); | |
4255 | if (ols->st_stateowner->so_is_open_owner | |
4256 | && !(openowner(ols->st_stateowner)->oo_flags | |
4257 | & NFS4_OO_CONFIRMED)) | |
1af71cc8 JL |
4258 | status = nfserr_bad_stateid; |
4259 | else | |
4260 | status = nfs_ok; | |
4261 | break; | |
23340032 BF |
4262 | default: |
4263 | printk("unknown stateid type %x\n", s->sc_type); | |
b0fc29d6 | 4264 | /* Fallthrough */ |
23340032 | 4265 | case NFS4_CLOSED_STID: |
b0fc29d6 | 4266 | case NFS4_CLOSED_DELEG_STID: |
1af71cc8 | 4267 | status = nfserr_bad_stateid; |
23340032 | 4268 | } |
1af71cc8 JL |
4269 | out_unlock: |
4270 | spin_unlock(&cl->cl_lock); | |
4271 | return status; | |
17456804 BS |
4272 | } |
4273 | ||
2dd6e458 TM |
4274 | static __be32 |
4275 | nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate, | |
4276 | stateid_t *stateid, unsigned char typemask, | |
4277 | struct nfs4_stid **s, struct nfsd_net *nn) | |
38c2f4b1 | 4278 | { |
0eb6f20a | 4279 | __be32 status; |
38c2f4b1 BF |
4280 | |
4281 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
4282 | return nfserr_bad_stateid; | |
4b24ca7d | 4283 | status = lookup_clientid(&stateid->si_opaque.so_clid, cstate, nn); |
a8a7c677 | 4284 | if (status == nfserr_stale_clientid) { |
4b24ca7d | 4285 | if (cstate->session) |
a8a7c677 | 4286 | return nfserr_bad_stateid; |
38c2f4b1 | 4287 | return nfserr_stale_stateid; |
a8a7c677 | 4288 | } |
0eb6f20a BF |
4289 | if (status) |
4290 | return status; | |
4b24ca7d | 4291 | *s = find_stateid_by_type(cstate->clp, stateid, typemask); |
38c2f4b1 BF |
4292 | if (!*s) |
4293 | return nfserr_bad_stateid; | |
4294 | return nfs_ok; | |
38c2f4b1 BF |
4295 | } |
4296 | ||
1da177e4 LT |
4297 | /* |
4298 | * Checks for stateid operations | |
4299 | */ | |
b37ad28b | 4300 | __be32 |
5ccb0066 | 4301 | nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate, |
dd453dfd | 4302 | stateid_t *stateid, int flags, struct file **filpp) |
1da177e4 | 4303 | { |
69064a27 | 4304 | struct nfs4_stid *s; |
dcef0413 | 4305 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 4306 | struct nfs4_delegation *dp = NULL; |
dd453dfd | 4307 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 4308 | struct inode *ino = current_fh->fh_dentry->d_inode; |
3320fef1 | 4309 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
14bcab1a | 4310 | struct file *file = NULL; |
b37ad28b | 4311 | __be32 status; |
1da177e4 | 4312 | |
1da177e4 LT |
4313 | if (filpp) |
4314 | *filpp = NULL; | |
4315 | ||
5ccb0066 | 4316 | if (grace_disallows_io(net, ino)) |
1da177e4 LT |
4317 | return nfserr_grace; |
4318 | ||
4319 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
5ccb0066 | 4320 | return check_special_stateids(net, current_fh, stateid, flags); |
1da177e4 | 4321 | |
14bcab1a TM |
4322 | nfs4_lock_state(); |
4323 | ||
2dd6e458 | 4324 | status = nfsd4_lookup_stateid(cstate, stateid, |
db24b3b4 | 4325 | NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, |
2dd6e458 | 4326 | &s, nn); |
38c2f4b1 | 4327 | if (status) |
fd911011 | 4328 | goto unlock_state; |
69064a27 BF |
4329 | status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); |
4330 | if (status) | |
4331 | goto out; | |
f7a4d872 BF |
4332 | switch (s->sc_type) { |
4333 | case NFS4_DELEG_STID: | |
69064a27 | 4334 | dp = delegstateid(s); |
dc9bf700 BF |
4335 | status = nfs4_check_delegmode(dp, flags); |
4336 | if (status) | |
4337 | goto out; | |
43b0178e | 4338 | if (filpp) { |
11b9164a | 4339 | file = dp->dl_stid.sc_file->fi_deleg_file; |
14bcab1a | 4340 | if (!file) { |
063b0fb9 BF |
4341 | WARN_ON_ONCE(1); |
4342 | status = nfserr_serverfault; | |
4343 | goto out; | |
4344 | } | |
de18643d | 4345 | get_file(file); |
43b0178e | 4346 | } |
f7a4d872 BF |
4347 | break; |
4348 | case NFS4_OPEN_STID: | |
4349 | case NFS4_LOCK_STID: | |
69064a27 | 4350 | stp = openlockstateid(s); |
f7a4d872 BF |
4351 | status = nfs4_check_fh(current_fh, stp); |
4352 | if (status) | |
1da177e4 | 4353 | goto out; |
fe0750e5 | 4354 | if (stp->st_stateowner->so_is_open_owner |
dad1c067 | 4355 | && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
1da177e4 | 4356 | goto out; |
a4455be0 BF |
4357 | status = nfs4_check_openmode(stp, flags); |
4358 | if (status) | |
1da177e4 | 4359 | goto out; |
f9d7562f | 4360 | if (filpp) { |
11b9164a TM |
4361 | struct nfs4_file *fp = stp->st_stid.sc_file; |
4362 | ||
f9d7562f | 4363 | if (flags & RD_STATE) |
11b9164a | 4364 | file = find_readable_file(fp); |
f9d7562f | 4365 | else |
11b9164a | 4366 | file = find_writeable_file(fp); |
f9d7562f | 4367 | } |
f7a4d872 BF |
4368 | break; |
4369 | default: | |
14bcab1a TM |
4370 | status = nfserr_bad_stateid; |
4371 | goto out; | |
1da177e4 LT |
4372 | } |
4373 | status = nfs_ok; | |
14bcab1a | 4374 | if (file) |
de18643d | 4375 | *filpp = file; |
1da177e4 | 4376 | out: |
fd911011 TM |
4377 | nfs4_put_stid(s); |
4378 | unlock_state: | |
14bcab1a | 4379 | nfs4_unlock_state(); |
1da177e4 LT |
4380 | return status; |
4381 | } | |
4382 | ||
e1ca12df | 4383 | static __be32 |
dcef0413 | 4384 | nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) |
e1ca12df | 4385 | { |
a1b8ff4c BF |
4386 | struct nfs4_lockowner *lo = lockowner(stp->st_stateowner); |
4387 | ||
11b9164a | 4388 | if (check_for_locks(stp->st_stid.sc_file, lo)) |
e1ca12df | 4389 | return nfserr_locks_held; |
5adfd885 | 4390 | release_lock_stateid(stp); |
e1ca12df BS |
4391 | return nfs_ok; |
4392 | } | |
4393 | ||
17456804 BS |
4394 | /* |
4395 | * Test if the stateid is valid | |
4396 | */ | |
4397 | __be32 | |
4398 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
4399 | struct nfsd4_test_stateid *test_stateid) | |
4400 | { | |
03cfb420 BS |
4401 | struct nfsd4_test_stateid_id *stateid; |
4402 | struct nfs4_client *cl = cstate->session->se_client; | |
4403 | ||
4404 | nfs4_lock_state(); | |
4405 | list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) | |
7df302f7 CL |
4406 | stateid->ts_id_status = |
4407 | nfsd4_validate_stateid(cl, &stateid->ts_id_stateid); | |
03cfb420 BS |
4408 | nfs4_unlock_state(); |
4409 | ||
17456804 BS |
4410 | return nfs_ok; |
4411 | } | |
4412 | ||
e1ca12df BS |
4413 | __be32 |
4414 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
4415 | struct nfsd4_free_stateid *free_stateid) | |
4416 | { | |
4417 | stateid_t *stateid = &free_stateid->fr_stateid; | |
2da1cec7 | 4418 | struct nfs4_stid *s; |
3bd64a5b | 4419 | struct nfs4_delegation *dp; |
38c2f4b1 | 4420 | struct nfs4_client *cl = cstate->session->se_client; |
2da1cec7 | 4421 | __be32 ret = nfserr_bad_stateid; |
e1ca12df BS |
4422 | |
4423 | nfs4_lock_state(); | |
1af71cc8 JL |
4424 | spin_lock(&cl->cl_lock); |
4425 | s = find_stateid_locked(cl, stateid); | |
2da1cec7 | 4426 | if (!s) |
1af71cc8 | 4427 | goto out_unlock; |
2da1cec7 BF |
4428 | switch (s->sc_type) { |
4429 | case NFS4_DELEG_STID: | |
e1ca12df | 4430 | ret = nfserr_locks_held; |
1af71cc8 | 4431 | break; |
2da1cec7 | 4432 | case NFS4_OPEN_STID: |
2da1cec7 BF |
4433 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); |
4434 | if (ret) | |
1af71cc8 JL |
4435 | break; |
4436 | ret = nfserr_locks_held; | |
f7a4d872 | 4437 | break; |
1af71cc8 JL |
4438 | case NFS4_LOCK_STID: |
4439 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); | |
4440 | if (ret) | |
4441 | break; | |
4442 | spin_unlock(&cl->cl_lock); | |
4443 | ret = nfsd4_free_lock_stateid(openlockstateid(s)); | |
4444 | goto out; | |
3bd64a5b BF |
4445 | case NFS4_REVOKED_DELEG_STID: |
4446 | dp = delegstateid(s); | |
2d4a532d JL |
4447 | list_del_init(&dp->dl_recall_lru); |
4448 | spin_unlock(&cl->cl_lock); | |
6011695d | 4449 | nfs4_put_stid(s); |
3bd64a5b | 4450 | ret = nfs_ok; |
1af71cc8 JL |
4451 | goto out; |
4452 | /* Default falls through and returns nfserr_bad_stateid */ | |
e1ca12df | 4453 | } |
1af71cc8 JL |
4454 | out_unlock: |
4455 | spin_unlock(&cl->cl_lock); | |
e1ca12df BS |
4456 | out: |
4457 | nfs4_unlock_state(); | |
4458 | return ret; | |
4459 | } | |
4460 | ||
4c4cd222 N |
4461 | static inline int |
4462 | setlkflg (int type) | |
4463 | { | |
4464 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
4465 | RD_STATE : WR_STATE; | |
4466 | } | |
1da177e4 | 4467 | |
dcef0413 | 4468 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
c0a5d93e BF |
4469 | { |
4470 | struct svc_fh *current_fh = &cstate->current_fh; | |
4471 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
4472 | __be32 status; | |
4473 | ||
c0a5d93e BF |
4474 | status = nfsd4_check_seqid(cstate, sop, seqid); |
4475 | if (status) | |
4476 | return status; | |
3bd64a5b BF |
4477 | if (stp->st_stid.sc_type == NFS4_CLOSED_STID |
4478 | || stp->st_stid.sc_type == NFS4_REVOKED_DELEG_STID) | |
f7a4d872 BF |
4479 | /* |
4480 | * "Closed" stateid's exist *only* to return | |
3bd64a5b BF |
4481 | * nfserr_replay_me from the previous step, and |
4482 | * revoked delegations are kept only for free_stateid. | |
f7a4d872 BF |
4483 | */ |
4484 | return nfserr_bad_stateid; | |
4485 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); | |
4486 | if (status) | |
4487 | return status; | |
4488 | return nfs4_check_fh(current_fh, stp); | |
c0a5d93e BF |
4489 | } |
4490 | ||
1da177e4 LT |
4491 | /* |
4492 | * Checks for sequence id mutating operations. | |
4493 | */ | |
b37ad28b | 4494 | static __be32 |
dd453dfd | 4495 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2288d0e3 | 4496 | stateid_t *stateid, char typemask, |
3320fef1 SK |
4497 | struct nfs4_ol_stateid **stpp, |
4498 | struct nfsd_net *nn) | |
1da177e4 | 4499 | { |
0836f587 | 4500 | __be32 status; |
38c2f4b1 | 4501 | struct nfs4_stid *s; |
e17f99b7 | 4502 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 4503 | |
8c10cbdb BH |
4504 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
4505 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 4506 | |
1da177e4 | 4507 | *stpp = NULL; |
2dd6e458 | 4508 | status = nfsd4_lookup_stateid(cstate, stateid, typemask, &s, nn); |
c0a5d93e BF |
4509 | if (status) |
4510 | return status; | |
e17f99b7 | 4511 | stp = openlockstateid(s); |
58fb12e6 | 4512 | nfsd4_cstate_assign_replay(cstate, stp->st_stateowner); |
1da177e4 | 4513 | |
e17f99b7 | 4514 | status = nfs4_seqid_op_checks(cstate, stateid, seqid, stp); |
fd911011 | 4515 | if (!status) |
e17f99b7 | 4516 | *stpp = stp; |
fd911011 TM |
4517 | else |
4518 | nfs4_put_stid(&stp->st_stid); | |
e17f99b7 | 4519 | return status; |
c0a5d93e | 4520 | } |
39325bd0 | 4521 | |
3320fef1 SK |
4522 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
4523 | stateid_t *stateid, struct nfs4_ol_stateid **stpp, struct nfsd_net *nn) | |
c0a5d93e BF |
4524 | { |
4525 | __be32 status; | |
4526 | struct nfs4_openowner *oo; | |
4cbfc9f7 | 4527 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4528 | |
c0a5d93e | 4529 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
4cbfc9f7 | 4530 | NFS4_OPEN_STID, &stp, nn); |
7a8711c9 BF |
4531 | if (status) |
4532 | return status; | |
4cbfc9f7 TM |
4533 | oo = openowner(stp->st_stateowner); |
4534 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { | |
4535 | nfs4_put_stid(&stp->st_stid); | |
3a4f98bb | 4536 | return nfserr_bad_stateid; |
4cbfc9f7 TM |
4537 | } |
4538 | *stpp = stp; | |
3a4f98bb | 4539 | return nfs_ok; |
1da177e4 LT |
4540 | } |
4541 | ||
b37ad28b | 4542 | __be32 |
ca364317 | 4543 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4544 | struct nfsd4_open_confirm *oc) |
1da177e4 | 4545 | { |
b37ad28b | 4546 | __be32 status; |
fe0750e5 | 4547 | struct nfs4_openowner *oo; |
dcef0413 | 4548 | struct nfs4_ol_stateid *stp; |
3320fef1 | 4549 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4550 | |
a6a9f18f AV |
4551 | dprintk("NFSD: nfsd4_open_confirm on file %pd\n", |
4552 | cstate->current_fh.fh_dentry); | |
1da177e4 | 4553 | |
ca364317 | 4554 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
4555 | if (status) |
4556 | return status; | |
1da177e4 LT |
4557 | |
4558 | nfs4_lock_state(); | |
4559 | ||
9072d5c6 | 4560 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 4561 | oc->oc_seqid, &oc->oc_req_stateid, |
3320fef1 | 4562 | NFS4_OPEN_STID, &stp, nn); |
9072d5c6 | 4563 | if (status) |
68b66e82 | 4564 | goto out; |
fe0750e5 | 4565 | oo = openowner(stp->st_stateowner); |
68b66e82 | 4566 | status = nfserr_bad_stateid; |
dad1c067 | 4567 | if (oo->oo_flags & NFS4_OO_CONFIRMED) |
2585fc79 | 4568 | goto put_stateid; |
dad1c067 | 4569 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
dcef0413 BF |
4570 | update_stateid(&stp->st_stid.sc_stateid); |
4571 | memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
8c10cbdb | 4572 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
dcef0413 | 4573 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); |
c7b9a459 | 4574 | |
2a4317c5 | 4575 | nfsd4_client_record_create(oo->oo_owner.so_client); |
68b66e82 | 4576 | status = nfs_ok; |
2585fc79 TM |
4577 | put_stateid: |
4578 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 4579 | out: |
9411b1d4 | 4580 | nfsd4_bump_seqid(cstate, status); |
58fb12e6 | 4581 | nfs4_unlock_state(); |
1da177e4 LT |
4582 | return status; |
4583 | } | |
4584 | ||
6409a5a6 | 4585 | static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) |
1da177e4 | 4586 | { |
82c5ff1b | 4587 | if (!test_access(access, stp)) |
6409a5a6 | 4588 | return; |
11b9164a | 4589 | nfs4_file_put_access(stp->st_stid.sc_file, access); |
82c5ff1b | 4590 | clear_access(access, stp); |
6409a5a6 | 4591 | } |
f197c271 | 4592 | |
6409a5a6 BF |
4593 | static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) |
4594 | { | |
4595 | switch (to_access) { | |
4596 | case NFS4_SHARE_ACCESS_READ: | |
4597 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); | |
4598 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
4599 | break; | |
4600 | case NFS4_SHARE_ACCESS_WRITE: | |
4601 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); | |
4602 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
4603 | break; | |
4604 | case NFS4_SHARE_ACCESS_BOTH: | |
4605 | break; | |
4606 | default: | |
063b0fb9 | 4607 | WARN_ON_ONCE(1); |
1da177e4 LT |
4608 | } |
4609 | } | |
4610 | ||
b37ad28b | 4611 | __be32 |
ca364317 BF |
4612 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
4613 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 4614 | struct nfsd4_open_downgrade *od) |
1da177e4 | 4615 | { |
b37ad28b | 4616 | __be32 status; |
dcef0413 | 4617 | struct nfs4_ol_stateid *stp; |
3320fef1 | 4618 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4619 | |
a6a9f18f AV |
4620 | dprintk("NFSD: nfsd4_open_downgrade on file %pd\n", |
4621 | cstate->current_fh.fh_dentry); | |
1da177e4 | 4622 | |
c30e92df | 4623 | /* We don't yet support WANT bits: */ |
2c8bd7e0 BH |
4624 | if (od->od_deleg_want) |
4625 | dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, | |
4626 | od->od_deleg_want); | |
1da177e4 LT |
4627 | |
4628 | nfs4_lock_state(); | |
c0a5d93e | 4629 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
3320fef1 | 4630 | &od->od_stateid, &stp, nn); |
9072d5c6 | 4631 | if (status) |
1da177e4 | 4632 | goto out; |
1da177e4 | 4633 | status = nfserr_inval; |
82c5ff1b | 4634 | if (!test_access(od->od_share_access, stp)) { |
c11c591f | 4635 | dprintk("NFSD: access not a subset of current bitmap: 0x%hhx, input access=%08x\n", |
1da177e4 | 4636 | stp->st_access_bmap, od->od_share_access); |
0667b1e9 | 4637 | goto put_stateid; |
1da177e4 | 4638 | } |
ce0fc43c | 4639 | if (!test_deny(od->od_share_deny, stp)) { |
c11c591f | 4640 | dprintk("NFSD: deny not a subset of current bitmap: 0x%hhx, input deny=%08x\n", |
1da177e4 | 4641 | stp->st_deny_bmap, od->od_share_deny); |
0667b1e9 | 4642 | goto put_stateid; |
1da177e4 | 4643 | } |
6409a5a6 | 4644 | nfs4_stateid_downgrade(stp, od->od_share_access); |
1da177e4 | 4645 | |
ce0fc43c | 4646 | reset_union_bmap_deny(od->od_share_deny, stp); |
1da177e4 | 4647 | |
dcef0413 BF |
4648 | update_stateid(&stp->st_stid.sc_stateid); |
4649 | memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 4650 | status = nfs_ok; |
0667b1e9 TM |
4651 | put_stateid: |
4652 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 4653 | out: |
9411b1d4 | 4654 | nfsd4_bump_seqid(cstate, status); |
58fb12e6 | 4655 | nfs4_unlock_state(); |
1da177e4 LT |
4656 | return status; |
4657 | } | |
4658 | ||
f7a4d872 BF |
4659 | static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) |
4660 | { | |
acf9295b | 4661 | struct nfs4_client *clp = s->st_stid.sc_client; |
acf9295b | 4662 | |
f7a4d872 | 4663 | s->st_stid.sc_type = NFS4_CLOSED_STID; |
acf9295b TM |
4664 | unhash_open_stateid(s); |
4665 | ||
d3134b10 | 4666 | if (clp->cl_minorversion) |
6011695d | 4667 | nfs4_put_stid(&s->st_stid); |
d3134b10 JL |
4668 | else |
4669 | move_to_close_lru(s, clp->net); | |
38c387b5 BF |
4670 | } |
4671 | ||
1da177e4 LT |
4672 | /* |
4673 | * nfs4_unlock_state() called after encode | |
4674 | */ | |
b37ad28b | 4675 | __be32 |
ca364317 | 4676 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4677 | struct nfsd4_close *close) |
1da177e4 | 4678 | { |
b37ad28b | 4679 | __be32 status; |
dcef0413 | 4680 | struct nfs4_ol_stateid *stp; |
3320fef1 SK |
4681 | struct net *net = SVC_NET(rqstp); |
4682 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 | 4683 | |
a6a9f18f AV |
4684 | dprintk("NFSD: nfsd4_close on file %pd\n", |
4685 | cstate->current_fh.fh_dentry); | |
1da177e4 LT |
4686 | |
4687 | nfs4_lock_state(); | |
f7a4d872 BF |
4688 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
4689 | &close->cl_stateid, | |
4690 | NFS4_OPEN_STID|NFS4_CLOSED_STID, | |
3320fef1 | 4691 | &stp, nn); |
9411b1d4 | 4692 | nfsd4_bump_seqid(cstate, status); |
9072d5c6 | 4693 | if (status) |
1da177e4 | 4694 | goto out; |
dcef0413 BF |
4695 | update_stateid(&stp->st_stid.sc_stateid); |
4696 | memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 4697 | |
f7a4d872 | 4698 | nfsd4_close_open_stateid(stp); |
8a0b589d TM |
4699 | |
4700 | /* put reference from nfs4_preprocess_seqid_op */ | |
4701 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 4702 | out: |
58fb12e6 | 4703 | nfs4_unlock_state(); |
1da177e4 LT |
4704 | return status; |
4705 | } | |
4706 | ||
b37ad28b | 4707 | __be32 |
ca364317 BF |
4708 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4709 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 4710 | { |
203a8c8e BF |
4711 | struct nfs4_delegation *dp; |
4712 | stateid_t *stateid = &dr->dr_stateid; | |
38c2f4b1 | 4713 | struct nfs4_stid *s; |
b37ad28b | 4714 | __be32 status; |
3320fef1 | 4715 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4716 | |
ca364317 | 4717 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e | 4718 | return status; |
1da177e4 LT |
4719 | |
4720 | nfs4_lock_state(); | |
2dd6e458 | 4721 | status = nfsd4_lookup_stateid(cstate, stateid, NFS4_DELEG_STID, &s, nn); |
38c2f4b1 | 4722 | if (status) |
203a8c8e | 4723 | goto out; |
38c2f4b1 | 4724 | dp = delegstateid(s); |
d5477a8d | 4725 | status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); |
203a8c8e | 4726 | if (status) |
fd911011 | 4727 | goto put_stateid; |
203a8c8e | 4728 | |
3bd64a5b | 4729 | destroy_delegation(dp); |
fd911011 TM |
4730 | put_stateid: |
4731 | nfs4_put_stid(&dp->dl_stid); | |
1da177e4 | 4732 | out: |
203a8c8e BF |
4733 | nfs4_unlock_state(); |
4734 | ||
1da177e4 LT |
4735 | return status; |
4736 | } | |
4737 | ||
4738 | ||
1da177e4 | 4739 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) |
1da177e4 | 4740 | |
87df4de8 BH |
4741 | static inline u64 |
4742 | end_offset(u64 start, u64 len) | |
4743 | { | |
4744 | u64 end; | |
4745 | ||
4746 | end = start + len; | |
4747 | return end >= start ? end: NFS4_MAX_UINT64; | |
4748 | } | |
4749 | ||
4750 | /* last octet in a range */ | |
4751 | static inline u64 | |
4752 | last_byte_offset(u64 start, u64 len) | |
4753 | { | |
4754 | u64 end; | |
4755 | ||
063b0fb9 | 4756 | WARN_ON_ONCE(!len); |
87df4de8 BH |
4757 | end = start + len; |
4758 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
4759 | } | |
4760 | ||
1da177e4 LT |
4761 | /* |
4762 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
4763 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
4764 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
4765 | * locking, this prevents us from being completely protocol-compliant. The | |
4766 | * real solution to this problem is to start using unsigned file offsets in | |
4767 | * the VFS, but this is a very deep change! | |
4768 | */ | |
4769 | static inline void | |
4770 | nfs4_transform_lock_offset(struct file_lock *lock) | |
4771 | { | |
4772 | if (lock->fl_start < 0) | |
4773 | lock->fl_start = OFFSET_MAX; | |
4774 | if (lock->fl_end < 0) | |
4775 | lock->fl_end = OFFSET_MAX; | |
4776 | } | |
4777 | ||
d5b9026a N |
4778 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
4779 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 4780 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 4781 | }; |
1da177e4 LT |
4782 | |
4783 | static inline void | |
4784 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
4785 | { | |
fe0750e5 | 4786 | struct nfs4_lockowner *lo; |
1da177e4 | 4787 | |
d5b9026a | 4788 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 BF |
4789 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
4790 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, | |
4791 | lo->lo_owner.so_owner.len, GFP_KERNEL); | |
7c13f344 BF |
4792 | if (!deny->ld_owner.data) |
4793 | /* We just don't care that much */ | |
4794 | goto nevermind; | |
fe0750e5 BF |
4795 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
4796 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; | |
d5b9026a | 4797 | } else { |
7c13f344 BF |
4798 | nevermind: |
4799 | deny->ld_owner.len = 0; | |
4800 | deny->ld_owner.data = NULL; | |
d5b9026a N |
4801 | deny->ld_clientid.cl_boot = 0; |
4802 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
4803 | } |
4804 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
4805 | deny->ld_length = NFS4_MAX_UINT64; |
4806 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
4807 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
4808 | deny->ld_type = NFS4_READ_LT; | |
4809 | if (fl->fl_type != F_RDLCK) | |
4810 | deny->ld_type = NFS4_WRITE_LT; | |
4811 | } | |
4812 | ||
fe0750e5 | 4813 | static struct nfs4_lockowner * |
c58c6610 | 4814 | find_lockowner_str_locked(clientid_t *clid, struct xdr_netobj *owner, |
d4f0489f | 4815 | struct nfs4_client *clp) |
1da177e4 | 4816 | { |
d4f0489f | 4817 | unsigned int strhashval = ownerstr_hashval(owner); |
b3c32bcd | 4818 | struct nfs4_stateowner *so; |
1da177e4 | 4819 | |
d4f0489f TM |
4820 | list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[strhashval], |
4821 | so_strhash) { | |
b3c32bcd TM |
4822 | if (so->so_is_open_owner) |
4823 | continue; | |
d4f0489f | 4824 | if (!same_owner_str(so, owner)) |
b3c32bcd | 4825 | continue; |
5db1c03f | 4826 | atomic_inc(&so->so_count); |
b3c32bcd | 4827 | return lockowner(so); |
1da177e4 LT |
4828 | } |
4829 | return NULL; | |
4830 | } | |
4831 | ||
c58c6610 TM |
4832 | static struct nfs4_lockowner * |
4833 | find_lockowner_str(clientid_t *clid, struct xdr_netobj *owner, | |
d4f0489f | 4834 | struct nfs4_client *clp) |
c58c6610 TM |
4835 | { |
4836 | struct nfs4_lockowner *lo; | |
4837 | ||
d4f0489f TM |
4838 | spin_lock(&clp->cl_lock); |
4839 | lo = find_lockowner_str_locked(clid, owner, clp); | |
4840 | spin_unlock(&clp->cl_lock); | |
c58c6610 TM |
4841 | return lo; |
4842 | } | |
4843 | ||
8f4b54c5 JL |
4844 | static void nfs4_unhash_lockowner(struct nfs4_stateowner *sop) |
4845 | { | |
c58c6610 | 4846 | unhash_lockowner_locked(lockowner(sop)); |
8f4b54c5 JL |
4847 | } |
4848 | ||
6b180f0b JL |
4849 | static void nfs4_free_lockowner(struct nfs4_stateowner *sop) |
4850 | { | |
4851 | struct nfs4_lockowner *lo = lockowner(sop); | |
4852 | ||
4853 | kmem_cache_free(lockowner_slab, lo); | |
4854 | } | |
4855 | ||
4856 | static const struct nfs4_stateowner_operations lockowner_ops = { | |
8f4b54c5 JL |
4857 | .so_unhash = nfs4_unhash_lockowner, |
4858 | .so_free = nfs4_free_lockowner, | |
6b180f0b JL |
4859 | }; |
4860 | ||
1da177e4 LT |
4861 | /* |
4862 | * Alloc a lock owner structure. | |
4863 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 4864 | * occurred. |
1da177e4 | 4865 | * |
16bfdaaf | 4866 | * strhashval = ownerstr_hashval |
1da177e4 | 4867 | */ |
fe0750e5 | 4868 | static struct nfs4_lockowner * |
c58c6610 TM |
4869 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, |
4870 | struct nfs4_ol_stateid *open_stp, | |
4871 | struct nfsd4_lock *lock) | |
4872 | { | |
c58c6610 | 4873 | struct nfs4_lockowner *lo, *ret; |
1da177e4 | 4874 | |
fe0750e5 BF |
4875 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
4876 | if (!lo) | |
1da177e4 | 4877 | return NULL; |
fe0750e5 BF |
4878 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
4879 | lo->lo_owner.so_is_open_owner = 0; | |
5db1c03f | 4880 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid; |
6b180f0b | 4881 | lo->lo_owner.so_ops = &lockowner_ops; |
d4f0489f | 4882 | spin_lock(&clp->cl_lock); |
c58c6610 | 4883 | ret = find_lockowner_str_locked(&clp->cl_clientid, |
d4f0489f | 4884 | &lock->lk_new_owner, clp); |
c58c6610 TM |
4885 | if (ret == NULL) { |
4886 | list_add(&lo->lo_owner.so_strhash, | |
d4f0489f | 4887 | &clp->cl_ownerstr_hashtbl[strhashval]); |
c58c6610 TM |
4888 | ret = lo; |
4889 | } else | |
4890 | nfs4_free_lockowner(&lo->lo_owner); | |
d4f0489f | 4891 | spin_unlock(&clp->cl_lock); |
fe0750e5 | 4892 | return lo; |
1da177e4 LT |
4893 | } |
4894 | ||
356a95ec JL |
4895 | static void |
4896 | init_lock_stateid(struct nfs4_ol_stateid *stp, struct nfs4_lockowner *lo, | |
4897 | struct nfs4_file *fp, struct inode *inode, | |
4898 | struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 4899 | { |
d3b313a4 | 4900 | struct nfs4_client *clp = lo->lo_owner.so_client; |
1da177e4 | 4901 | |
356a95ec JL |
4902 | lockdep_assert_held(&clp->cl_lock); |
4903 | ||
3d0fabd5 | 4904 | atomic_inc(&stp->st_stid.sc_count); |
3abdb607 | 4905 | stp->st_stid.sc_type = NFS4_LOCK_STID; |
fe0750e5 | 4906 | stp->st_stateowner = &lo->lo_owner; |
e4f1dd7f | 4907 | atomic_inc(&lo->lo_owner.so_count); |
13cd2184 | 4908 | get_nfs4_file(fp); |
11b9164a | 4909 | stp->st_stid.sc_file = fp; |
b49e084d | 4910 | stp->st_stid.sc_free = nfs4_free_lock_stateid; |
0997b173 | 4911 | stp->st_access_bmap = 0; |
1da177e4 | 4912 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 4913 | stp->st_openstp = open_stp; |
3c87b9b7 | 4914 | list_add(&stp->st_locks, &open_stp->st_locks); |
1c755dc1 | 4915 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
1d31a253 TM |
4916 | spin_lock(&fp->fi_lock); |
4917 | list_add(&stp->st_perfile, &fp->fi_stateids); | |
4918 | spin_unlock(&fp->fi_lock); | |
1da177e4 LT |
4919 | } |
4920 | ||
c53530da JL |
4921 | static struct nfs4_ol_stateid * |
4922 | find_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp) | |
4923 | { | |
4924 | struct nfs4_ol_stateid *lst; | |
356a95ec JL |
4925 | struct nfs4_client *clp = lo->lo_owner.so_client; |
4926 | ||
4927 | lockdep_assert_held(&clp->cl_lock); | |
c53530da JL |
4928 | |
4929 | list_for_each_entry(lst, &lo->lo_owner.so_stateids, st_perstateowner) { | |
3d0fabd5 TM |
4930 | if (lst->st_stid.sc_file == fp) { |
4931 | atomic_inc(&lst->st_stid.sc_count); | |
c53530da | 4932 | return lst; |
3d0fabd5 | 4933 | } |
c53530da JL |
4934 | } |
4935 | return NULL; | |
4936 | } | |
4937 | ||
356a95ec JL |
4938 | static struct nfs4_ol_stateid * |
4939 | find_or_create_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fi, | |
4940 | struct inode *inode, struct nfs4_ol_stateid *ost, | |
4941 | bool *new) | |
4942 | { | |
4943 | struct nfs4_stid *ns = NULL; | |
4944 | struct nfs4_ol_stateid *lst; | |
4945 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); | |
4946 | struct nfs4_client *clp = oo->oo_owner.so_client; | |
4947 | ||
4948 | spin_lock(&clp->cl_lock); | |
4949 | lst = find_lock_stateid(lo, fi); | |
4950 | if (lst == NULL) { | |
4951 | spin_unlock(&clp->cl_lock); | |
4952 | ns = nfs4_alloc_stid(clp, stateid_slab); | |
4953 | if (ns == NULL) | |
4954 | return NULL; | |
4955 | ||
4956 | spin_lock(&clp->cl_lock); | |
4957 | lst = find_lock_stateid(lo, fi); | |
4958 | if (likely(!lst)) { | |
4959 | lst = openlockstateid(ns); | |
4960 | init_lock_stateid(lst, lo, fi, inode, ost); | |
4961 | ns = NULL; | |
4962 | *new = true; | |
4963 | } | |
4964 | } | |
4965 | spin_unlock(&clp->cl_lock); | |
4966 | if (ns) | |
4967 | nfs4_put_stid(ns); | |
4968 | return lst; | |
4969 | } | |
c53530da | 4970 | |
fd39ca9a | 4971 | static int |
1da177e4 LT |
4972 | check_lock_length(u64 offset, u64 length) |
4973 | { | |
87df4de8 | 4974 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
4975 | LOFF_OVERFLOW(offset, length))); |
4976 | } | |
4977 | ||
dcef0413 | 4978 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 | 4979 | { |
11b9164a | 4980 | struct nfs4_file *fp = lock_stp->st_stid.sc_file; |
0997b173 | 4981 | |
7214e860 JL |
4982 | lockdep_assert_held(&fp->fi_lock); |
4983 | ||
82c5ff1b | 4984 | if (test_access(access, lock_stp)) |
0997b173 | 4985 | return; |
12659651 | 4986 | __nfs4_file_get_access(fp, access); |
82c5ff1b | 4987 | set_access(access, lock_stp); |
0997b173 BF |
4988 | } |
4989 | ||
356a95ec JL |
4990 | static __be32 |
4991 | lookup_or_create_lock_state(struct nfsd4_compound_state *cstate, | |
4992 | struct nfs4_ol_stateid *ost, | |
4993 | struct nfsd4_lock *lock, | |
4994 | struct nfs4_ol_stateid **lst, bool *new) | |
64a284d0 | 4995 | { |
5db1c03f | 4996 | __be32 status; |
11b9164a | 4997 | struct nfs4_file *fi = ost->st_stid.sc_file; |
64a284d0 BF |
4998 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); |
4999 | struct nfs4_client *cl = oo->oo_owner.so_client; | |
f9c00c3a | 5000 | struct inode *inode = cstate->current_fh.fh_dentry->d_inode; |
64a284d0 BF |
5001 | struct nfs4_lockowner *lo; |
5002 | unsigned int strhashval; | |
5003 | ||
d4f0489f | 5004 | lo = find_lockowner_str(&cl->cl_clientid, &lock->v.new.owner, cl); |
c53530da | 5005 | if (!lo) { |
d4f0489f | 5006 | strhashval = ownerstr_hashval(&lock->v.new.owner); |
c53530da JL |
5007 | lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); |
5008 | if (lo == NULL) | |
5009 | return nfserr_jukebox; | |
5010 | } else { | |
5011 | /* with an existing lockowner, seqids must be the same */ | |
5db1c03f | 5012 | status = nfserr_bad_seqid; |
c53530da JL |
5013 | if (!cstate->minorversion && |
5014 | lock->lk_new_lock_seqid != lo->lo_owner.so_seqid) | |
5db1c03f | 5015 | goto out; |
64a284d0 | 5016 | } |
c53530da | 5017 | |
356a95ec | 5018 | *lst = find_or_create_lock_stateid(lo, fi, inode, ost, new); |
64a284d0 | 5019 | if (*lst == NULL) { |
5db1c03f JL |
5020 | status = nfserr_jukebox; |
5021 | goto out; | |
64a284d0 | 5022 | } |
5db1c03f JL |
5023 | status = nfs_ok; |
5024 | out: | |
5025 | nfs4_put_stateowner(&lo->lo_owner); | |
5026 | return status; | |
64a284d0 BF |
5027 | } |
5028 | ||
1da177e4 LT |
5029 | /* |
5030 | * LOCK operation | |
5031 | */ | |
b37ad28b | 5032 | __be32 |
ca364317 | 5033 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 5034 | struct nfsd4_lock *lock) |
1da177e4 | 5035 | { |
fe0750e5 BF |
5036 | struct nfs4_openowner *open_sop = NULL; |
5037 | struct nfs4_lockowner *lock_sop = NULL; | |
3d0fabd5 | 5038 | struct nfs4_ol_stateid *lock_stp = NULL; |
0667b1e9 | 5039 | struct nfs4_ol_stateid *open_stp = NULL; |
7214e860 | 5040 | struct nfs4_file *fp; |
7d947842 | 5041 | struct file *filp = NULL; |
21179d81 JL |
5042 | struct file_lock *file_lock = NULL; |
5043 | struct file_lock *conflock = NULL; | |
b37ad28b | 5044 | __be32 status = 0; |
b34f27aa | 5045 | int lkflg; |
b8dd7b9a | 5046 | int err; |
5db1c03f | 5047 | bool new = false; |
3320fef1 SK |
5048 | struct net *net = SVC_NET(rqstp); |
5049 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 LT |
5050 | |
5051 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
5052 | (long long) lock->lk_offset, | |
5053 | (long long) lock->lk_length); | |
5054 | ||
1da177e4 LT |
5055 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
5056 | return nfserr_inval; | |
5057 | ||
ca364317 | 5058 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 5059 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
5060 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
5061 | return status; | |
5062 | } | |
5063 | ||
1da177e4 LT |
5064 | nfs4_lock_state(); |
5065 | ||
5066 | if (lock->lk_is_new) { | |
684e5638 BF |
5067 | if (nfsd4_has_session(cstate)) |
5068 | /* See rfc 5661 18.10.3: given clientid is ignored: */ | |
5069 | memcpy(&lock->v.new.clientid, | |
5070 | &cstate->session->se_client->cl_clientid, | |
5071 | sizeof(clientid_t)); | |
5072 | ||
1da177e4 | 5073 | status = nfserr_stale_clientid; |
2c142baa | 5074 | if (STALE_CLIENTID(&lock->lk_new_clientid, nn)) |
1da177e4 | 5075 | goto out; |
1da177e4 | 5076 | |
1da177e4 | 5077 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 5078 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
5079 | lock->lk_new_open_seqid, |
5080 | &lock->lk_new_open_stateid, | |
3320fef1 | 5081 | &open_stp, nn); |
37515177 | 5082 | if (status) |
1da177e4 | 5083 | goto out; |
fe0750e5 | 5084 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 5085 | status = nfserr_bad_stateid; |
684e5638 | 5086 | if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
b34f27aa BF |
5087 | &lock->v.new.clientid)) |
5088 | goto out; | |
64a284d0 | 5089 | status = lookup_or_create_lock_state(cstate, open_stp, lock, |
5db1c03f | 5090 | &lock_stp, &new); |
3d0fabd5 | 5091 | } else { |
dd453dfd | 5092 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
5093 | lock->lk_old_lock_seqid, |
5094 | &lock->lk_old_lock_stateid, | |
3320fef1 | 5095 | NFS4_LOCK_STID, &lock_stp, nn); |
3d0fabd5 | 5096 | } |
e1aaa891 BF |
5097 | if (status) |
5098 | goto out; | |
64a284d0 | 5099 | lock_sop = lockowner(lock_stp->st_stateowner); |
1da177e4 | 5100 | |
b34f27aa BF |
5101 | lkflg = setlkflg(lock->lk_type); |
5102 | status = nfs4_check_openmode(lock_stp, lkflg); | |
5103 | if (status) | |
5104 | goto out; | |
5105 | ||
0dd395dc | 5106 | status = nfserr_grace; |
3320fef1 | 5107 | if (locks_in_grace(net) && !lock->lk_reclaim) |
0dd395dc N |
5108 | goto out; |
5109 | status = nfserr_no_grace; | |
3320fef1 | 5110 | if (!locks_in_grace(net) && lock->lk_reclaim) |
0dd395dc N |
5111 | goto out; |
5112 | ||
21179d81 JL |
5113 | file_lock = locks_alloc_lock(); |
5114 | if (!file_lock) { | |
5115 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
5116 | status = nfserr_jukebox; | |
5117 | goto out; | |
5118 | } | |
5119 | ||
11b9164a | 5120 | fp = lock_stp->st_stid.sc_file; |
21179d81 | 5121 | locks_init_lock(file_lock); |
1da177e4 LT |
5122 | switch (lock->lk_type) { |
5123 | case NFS4_READ_LT: | |
5124 | case NFS4_READW_LT: | |
7214e860 JL |
5125 | spin_lock(&fp->fi_lock); |
5126 | filp = find_readable_file_locked(fp); | |
0997b173 BF |
5127 | if (filp) |
5128 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
7214e860 | 5129 | spin_unlock(&fp->fi_lock); |
21179d81 | 5130 | file_lock->fl_type = F_RDLCK; |
529d7b2a | 5131 | break; |
1da177e4 LT |
5132 | case NFS4_WRITE_LT: |
5133 | case NFS4_WRITEW_LT: | |
7214e860 JL |
5134 | spin_lock(&fp->fi_lock); |
5135 | filp = find_writeable_file_locked(fp); | |
0997b173 BF |
5136 | if (filp) |
5137 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
7214e860 | 5138 | spin_unlock(&fp->fi_lock); |
21179d81 | 5139 | file_lock->fl_type = F_WRLCK; |
529d7b2a | 5140 | break; |
1da177e4 LT |
5141 | default: |
5142 | status = nfserr_inval; | |
5143 | goto out; | |
5144 | } | |
f9d7562f BF |
5145 | if (!filp) { |
5146 | status = nfserr_openmode; | |
5147 | goto out; | |
5148 | } | |
21179d81 JL |
5149 | file_lock->fl_owner = (fl_owner_t)lock_sop; |
5150 | file_lock->fl_pid = current->tgid; | |
5151 | file_lock->fl_file = filp; | |
5152 | file_lock->fl_flags = FL_POSIX; | |
5153 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
5154 | file_lock->fl_start = lock->lk_offset; | |
5155 | file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); | |
5156 | nfs4_transform_lock_offset(file_lock); | |
5157 | ||
5158 | conflock = locks_alloc_lock(); | |
5159 | if (!conflock) { | |
5160 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
5161 | status = nfserr_jukebox; | |
5162 | goto out; | |
5163 | } | |
1da177e4 | 5164 | |
21179d81 | 5165 | err = vfs_lock_file(filp, F_SETLK, file_lock, conflock); |
b8dd7b9a | 5166 | switch (-err) { |
1da177e4 | 5167 | case 0: /* success! */ |
dcef0413 BF |
5168 | update_stateid(&lock_stp->st_stid.sc_stateid); |
5169 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, | |
1da177e4 | 5170 | sizeof(stateid_t)); |
b8dd7b9a | 5171 | status = 0; |
eb76b3fd AA |
5172 | break; |
5173 | case (EAGAIN): /* conflock holds conflicting lock */ | |
5174 | status = nfserr_denied; | |
5175 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
21179d81 | 5176 | nfs4_set_lock_denied(conflock, &lock->lk_denied); |
eb76b3fd | 5177 | break; |
1da177e4 LT |
5178 | case (EDEADLK): |
5179 | status = nfserr_deadlock; | |
eb76b3fd | 5180 | break; |
3e772463 | 5181 | default: |
fd85b817 | 5182 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 5183 | status = nfserrno(err); |
eb76b3fd | 5184 | break; |
1da177e4 | 5185 | } |
1da177e4 | 5186 | out: |
de18643d TM |
5187 | if (filp) |
5188 | fput(filp); | |
5db1c03f JL |
5189 | if (lock_stp) { |
5190 | /* Bump seqid manually if the 4.0 replay owner is openowner */ | |
5191 | if (cstate->replay_owner && | |
5192 | cstate->replay_owner != &lock_sop->lo_owner && | |
5193 | seqid_mutating_err(ntohl(status))) | |
5194 | lock_sop->lo_owner.so_seqid++; | |
5195 | ||
5196 | /* | |
5197 | * If this is a new, never-before-used stateid, and we are | |
5198 | * returning an error, then just go ahead and release it. | |
5199 | */ | |
5200 | if (status && new) | |
5201 | release_lock_stateid(lock_stp); | |
5202 | ||
3d0fabd5 | 5203 | nfs4_put_stid(&lock_stp->st_stid); |
5db1c03f | 5204 | } |
0667b1e9 TM |
5205 | if (open_stp) |
5206 | nfs4_put_stid(&open_stp->st_stid); | |
9411b1d4 | 5207 | nfsd4_bump_seqid(cstate, status); |
58fb12e6 | 5208 | nfs4_unlock_state(); |
21179d81 JL |
5209 | if (file_lock) |
5210 | locks_free_lock(file_lock); | |
5211 | if (conflock) | |
5212 | locks_free_lock(conflock); | |
1da177e4 LT |
5213 | return status; |
5214 | } | |
5215 | ||
55ef1274 BF |
5216 | /* |
5217 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
5218 | * so we do a temporary open here just to get an open file to pass to | |
5219 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
5220 | * inode operation.) | |
5221 | */ | |
04da6e9d | 5222 | static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) |
55ef1274 BF |
5223 | { |
5224 | struct file *file; | |
04da6e9d AV |
5225 | __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); |
5226 | if (!err) { | |
5227 | err = nfserrno(vfs_test_lock(file, lock)); | |
5228 | nfsd_close(file); | |
5229 | } | |
55ef1274 BF |
5230 | return err; |
5231 | } | |
5232 | ||
1da177e4 LT |
5233 | /* |
5234 | * LOCKT operation | |
5235 | */ | |
b37ad28b | 5236 | __be32 |
ca364317 BF |
5237 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
5238 | struct nfsd4_lockt *lockt) | |
1da177e4 | 5239 | { |
21179d81 | 5240 | struct file_lock *file_lock = NULL; |
5db1c03f | 5241 | struct nfs4_lockowner *lo = NULL; |
b37ad28b | 5242 | __be32 status; |
7f2210fa | 5243 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 5244 | |
5ccb0066 | 5245 | if (locks_in_grace(SVC_NET(rqstp))) |
1da177e4 LT |
5246 | return nfserr_grace; |
5247 | ||
5248 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
5249 | return nfserr_inval; | |
5250 | ||
1da177e4 LT |
5251 | nfs4_lock_state(); |
5252 | ||
9b2ef62b | 5253 | if (!nfsd4_has_session(cstate)) { |
4b24ca7d | 5254 | status = lookup_clientid(&lockt->lt_clientid, cstate, nn); |
9b2ef62b BF |
5255 | if (status) |
5256 | goto out; | |
5257 | } | |
1da177e4 | 5258 | |
75c096f7 | 5259 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 5260 | goto out; |
1da177e4 | 5261 | |
21179d81 JL |
5262 | file_lock = locks_alloc_lock(); |
5263 | if (!file_lock) { | |
5264 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
5265 | status = nfserr_jukebox; | |
5266 | goto out; | |
5267 | } | |
5268 | locks_init_lock(file_lock); | |
1da177e4 LT |
5269 | switch (lockt->lt_type) { |
5270 | case NFS4_READ_LT: | |
5271 | case NFS4_READW_LT: | |
21179d81 | 5272 | file_lock->fl_type = F_RDLCK; |
1da177e4 LT |
5273 | break; |
5274 | case NFS4_WRITE_LT: | |
5275 | case NFS4_WRITEW_LT: | |
21179d81 | 5276 | file_lock->fl_type = F_WRLCK; |
1da177e4 LT |
5277 | break; |
5278 | default: | |
2fdada03 | 5279 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
5280 | status = nfserr_inval; |
5281 | goto out; | |
5282 | } | |
5283 | ||
d4f0489f TM |
5284 | lo = find_lockowner_str(&lockt->lt_clientid, &lockt->lt_owner, |
5285 | cstate->clp); | |
fe0750e5 | 5286 | if (lo) |
21179d81 JL |
5287 | file_lock->fl_owner = (fl_owner_t)lo; |
5288 | file_lock->fl_pid = current->tgid; | |
5289 | file_lock->fl_flags = FL_POSIX; | |
1da177e4 | 5290 | |
21179d81 JL |
5291 | file_lock->fl_start = lockt->lt_offset; |
5292 | file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); | |
1da177e4 | 5293 | |
21179d81 | 5294 | nfs4_transform_lock_offset(file_lock); |
1da177e4 | 5295 | |
21179d81 | 5296 | status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock); |
04da6e9d | 5297 | if (status) |
fd85b817 | 5298 | goto out; |
04da6e9d | 5299 | |
21179d81 | 5300 | if (file_lock->fl_type != F_UNLCK) { |
1da177e4 | 5301 | status = nfserr_denied; |
21179d81 | 5302 | nfs4_set_lock_denied(file_lock, &lockt->lt_denied); |
1da177e4 LT |
5303 | } |
5304 | out: | |
5db1c03f JL |
5305 | if (lo) |
5306 | nfs4_put_stateowner(&lo->lo_owner); | |
1da177e4 | 5307 | nfs4_unlock_state(); |
21179d81 JL |
5308 | if (file_lock) |
5309 | locks_free_lock(file_lock); | |
1da177e4 LT |
5310 | return status; |
5311 | } | |
5312 | ||
b37ad28b | 5313 | __be32 |
ca364317 | 5314 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 5315 | struct nfsd4_locku *locku) |
1da177e4 | 5316 | { |
dcef0413 | 5317 | struct nfs4_ol_stateid *stp; |
1da177e4 | 5318 | struct file *filp = NULL; |
21179d81 | 5319 | struct file_lock *file_lock = NULL; |
b37ad28b | 5320 | __be32 status; |
b8dd7b9a | 5321 | int err; |
3320fef1 SK |
5322 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
5323 | ||
1da177e4 LT |
5324 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", |
5325 | (long long) locku->lu_offset, | |
5326 | (long long) locku->lu_length); | |
5327 | ||
5328 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
5329 | return nfserr_inval; | |
5330 | ||
5331 | nfs4_lock_state(); | |
5332 | ||
9072d5c6 | 5333 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
3320fef1 SK |
5334 | &locku->lu_stateid, NFS4_LOCK_STID, |
5335 | &stp, nn); | |
9072d5c6 | 5336 | if (status) |
1da177e4 | 5337 | goto out; |
11b9164a | 5338 | filp = find_any_file(stp->st_stid.sc_file); |
f9d7562f BF |
5339 | if (!filp) { |
5340 | status = nfserr_lock_range; | |
858cc573 | 5341 | goto put_stateid; |
f9d7562f | 5342 | } |
21179d81 JL |
5343 | file_lock = locks_alloc_lock(); |
5344 | if (!file_lock) { | |
5345 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
5346 | status = nfserr_jukebox; | |
de18643d | 5347 | goto fput; |
21179d81 JL |
5348 | } |
5349 | locks_init_lock(file_lock); | |
5350 | file_lock->fl_type = F_UNLCK; | |
0a262ffb | 5351 | file_lock->fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); |
21179d81 JL |
5352 | file_lock->fl_pid = current->tgid; |
5353 | file_lock->fl_file = filp; | |
5354 | file_lock->fl_flags = FL_POSIX; | |
5355 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
5356 | file_lock->fl_start = locku->lu_offset; | |
5357 | ||
5358 | file_lock->fl_end = last_byte_offset(locku->lu_offset, | |
5359 | locku->lu_length); | |
5360 | nfs4_transform_lock_offset(file_lock); | |
1da177e4 | 5361 | |
21179d81 | 5362 | err = vfs_lock_file(filp, F_SETLK, file_lock, NULL); |
b8dd7b9a | 5363 | if (err) { |
fd85b817 | 5364 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
5365 | goto out_nfserr; |
5366 | } | |
dcef0413 BF |
5367 | update_stateid(&stp->st_stid.sc_stateid); |
5368 | memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
de18643d TM |
5369 | fput: |
5370 | fput(filp); | |
858cc573 TM |
5371 | put_stateid: |
5372 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 5373 | out: |
9411b1d4 | 5374 | nfsd4_bump_seqid(cstate, status); |
58fb12e6 | 5375 | nfs4_unlock_state(); |
21179d81 JL |
5376 | if (file_lock) |
5377 | locks_free_lock(file_lock); | |
1da177e4 LT |
5378 | return status; |
5379 | ||
5380 | out_nfserr: | |
b8dd7b9a | 5381 | status = nfserrno(err); |
de18643d | 5382 | goto fput; |
1da177e4 LT |
5383 | } |
5384 | ||
5385 | /* | |
5386 | * returns | |
f9c00c3a JL |
5387 | * true: locks held by lockowner |
5388 | * false: no locks held by lockowner | |
1da177e4 | 5389 | */ |
f9c00c3a JL |
5390 | static bool |
5391 | check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner) | |
1da177e4 LT |
5392 | { |
5393 | struct file_lock **flpp; | |
f9c00c3a JL |
5394 | int status = false; |
5395 | struct file *filp = find_any_file(fp); | |
5396 | struct inode *inode; | |
5397 | ||
5398 | if (!filp) { | |
5399 | /* Any valid lock stateid should have some sort of access */ | |
5400 | WARN_ON_ONCE(1); | |
5401 | return status; | |
5402 | } | |
5403 | ||
5404 | inode = file_inode(filp); | |
1da177e4 | 5405 | |
1c8c601a | 5406 | spin_lock(&inode->i_lock); |
1da177e4 | 5407 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
796dadfd | 5408 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
f9c00c3a JL |
5409 | status = true; |
5410 | break; | |
796dadfd | 5411 | } |
1da177e4 | 5412 | } |
1c8c601a | 5413 | spin_unlock(&inode->i_lock); |
f9c00c3a | 5414 | fput(filp); |
1da177e4 LT |
5415 | return status; |
5416 | } | |
5417 | ||
b37ad28b | 5418 | __be32 |
b591480b BF |
5419 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
5420 | struct nfsd4_compound_state *cstate, | |
5421 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
5422 | { |
5423 | clientid_t *clid = &rlockowner->rl_clientid; | |
882e9d25 JL |
5424 | struct nfs4_stateowner *sop; |
5425 | struct nfs4_lockowner *lo = NULL; | |
dcef0413 | 5426 | struct nfs4_ol_stateid *stp; |
1da177e4 | 5427 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
d4f0489f | 5428 | unsigned int hashval = ownerstr_hashval(owner); |
b37ad28b | 5429 | __be32 status; |
7f2210fa | 5430 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
c58c6610 | 5431 | struct nfs4_client *clp; |
1da177e4 LT |
5432 | |
5433 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
5434 | clid->cl_boot, clid->cl_id); | |
5435 | ||
1da177e4 LT |
5436 | nfs4_lock_state(); |
5437 | ||
4b24ca7d | 5438 | status = lookup_clientid(clid, cstate, nn); |
9b2ef62b BF |
5439 | if (status) |
5440 | goto out; | |
5441 | ||
d4f0489f | 5442 | clp = cstate->clp; |
fd44907c | 5443 | /* Find the matching lock stateowner */ |
d4f0489f | 5444 | spin_lock(&clp->cl_lock); |
882e9d25 | 5445 | list_for_each_entry(sop, &clp->cl_ownerstr_hashtbl[hashval], |
d4f0489f | 5446 | so_strhash) { |
fd44907c | 5447 | |
882e9d25 JL |
5448 | if (sop->so_is_open_owner || !same_owner_str(sop, owner)) |
5449 | continue; | |
fd44907c | 5450 | |
882e9d25 JL |
5451 | /* see if there are still any locks associated with it */ |
5452 | lo = lockowner(sop); | |
5453 | list_for_each_entry(stp, &sop->so_stateids, st_perstateowner) { | |
5454 | if (check_for_locks(stp->st_stid.sc_file, lo)) { | |
5455 | status = nfserr_locks_held; | |
5456 | spin_unlock(&clp->cl_lock); | |
5457 | goto out; | |
5458 | } | |
5adfd885 | 5459 | } |
882e9d25 JL |
5460 | |
5461 | atomic_inc(&sop->so_count); | |
5462 | break; | |
1da177e4 | 5463 | } |
c58c6610 | 5464 | spin_unlock(&clp->cl_lock); |
882e9d25 JL |
5465 | if (lo) |
5466 | release_lockowner(lo); | |
1da177e4 LT |
5467 | out: |
5468 | nfs4_unlock_state(); | |
5469 | return status; | |
5470 | } | |
5471 | ||
5472 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 5473 | alloc_reclaim(void) |
1da177e4 | 5474 | { |
a55370a3 | 5475 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
5476 | } |
5477 | ||
0ce0c2b5 | 5478 | bool |
52e19c09 | 5479 | nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn) |
c7b9a459 | 5480 | { |
0ce0c2b5 | 5481 | struct nfs4_client_reclaim *crp; |
c7b9a459 | 5482 | |
52e19c09 | 5483 | crp = nfsd4_find_reclaim_client(name, nn); |
0ce0c2b5 | 5484 | return (crp && crp->cr_clp); |
c7b9a459 N |
5485 | } |
5486 | ||
1da177e4 LT |
5487 | /* |
5488 | * failure => all reset bets are off, nfserr_no_grace... | |
5489 | */ | |
772a9bbb | 5490 | struct nfs4_client_reclaim * |
52e19c09 | 5491 | nfs4_client_to_reclaim(const char *name, struct nfsd_net *nn) |
1da177e4 LT |
5492 | { |
5493 | unsigned int strhashval; | |
772a9bbb | 5494 | struct nfs4_client_reclaim *crp; |
1da177e4 | 5495 | |
a55370a3 N |
5496 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
5497 | crp = alloc_reclaim(); | |
772a9bbb JL |
5498 | if (crp) { |
5499 | strhashval = clientstr_hashval(name); | |
5500 | INIT_LIST_HEAD(&crp->cr_strhash); | |
52e19c09 | 5501 | list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]); |
772a9bbb | 5502 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
0ce0c2b5 | 5503 | crp->cr_clp = NULL; |
52e19c09 | 5504 | nn->reclaim_str_hashtbl_size++; |
772a9bbb JL |
5505 | } |
5506 | return crp; | |
1da177e4 LT |
5507 | } |
5508 | ||
ce30e539 | 5509 | void |
52e19c09 | 5510 | nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn) |
ce30e539 JL |
5511 | { |
5512 | list_del(&crp->cr_strhash); | |
5513 | kfree(crp); | |
52e19c09 | 5514 | nn->reclaim_str_hashtbl_size--; |
ce30e539 JL |
5515 | } |
5516 | ||
2a4317c5 | 5517 | void |
52e19c09 | 5518 | nfs4_release_reclaim(struct nfsd_net *nn) |
1da177e4 LT |
5519 | { |
5520 | struct nfs4_client_reclaim *crp = NULL; | |
5521 | int i; | |
5522 | ||
1da177e4 | 5523 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
52e19c09 SK |
5524 | while (!list_empty(&nn->reclaim_str_hashtbl[i])) { |
5525 | crp = list_entry(nn->reclaim_str_hashtbl[i].next, | |
1da177e4 | 5526 | struct nfs4_client_reclaim, cr_strhash); |
52e19c09 | 5527 | nfs4_remove_reclaim_record(crp, nn); |
1da177e4 LT |
5528 | } |
5529 | } | |
063b0fb9 | 5530 | WARN_ON_ONCE(nn->reclaim_str_hashtbl_size); |
1da177e4 LT |
5531 | } |
5532 | ||
5533 | /* | |
5534 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
2a4317c5 | 5535 | struct nfs4_client_reclaim * |
52e19c09 | 5536 | nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn) |
1da177e4 LT |
5537 | { |
5538 | unsigned int strhashval; | |
1da177e4 LT |
5539 | struct nfs4_client_reclaim *crp = NULL; |
5540 | ||
278c931c | 5541 | dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir); |
1da177e4 | 5542 | |
278c931c | 5543 | strhashval = clientstr_hashval(recdir); |
52e19c09 | 5544 | list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) { |
278c931c | 5545 | if (same_name(crp->cr_recdir, recdir)) { |
1da177e4 LT |
5546 | return crp; |
5547 | } | |
5548 | } | |
5549 | return NULL; | |
5550 | } | |
5551 | ||
5552 | /* | |
5553 | * Called from OPEN. Look for clientid in reclaim list. | |
5554 | */ | |
b37ad28b | 5555 | __be32 |
0fe492db TM |
5556 | nfs4_check_open_reclaim(clientid_t *clid, |
5557 | struct nfsd4_compound_state *cstate, | |
5558 | struct nfsd_net *nn) | |
1da177e4 | 5559 | { |
0fe492db | 5560 | __be32 status; |
a52d726b JL |
5561 | |
5562 | /* find clientid in conf_id_hashtbl */ | |
0fe492db TM |
5563 | status = lookup_clientid(clid, cstate, nn); |
5564 | if (status) | |
a52d726b JL |
5565 | return nfserr_reclaim_bad; |
5566 | ||
0fe492db TM |
5567 | if (nfsd4_client_record_check(cstate->clp)) |
5568 | return nfserr_reclaim_bad; | |
5569 | ||
5570 | return nfs_ok; | |
1da177e4 LT |
5571 | } |
5572 | ||
65178db4 BS |
5573 | #ifdef CONFIG_NFSD_FAULT_INJECTION |
5574 | ||
44e34da6 BS |
5575 | u64 nfsd_forget_client(struct nfs4_client *clp, u64 max) |
5576 | { | |
221a6876 BF |
5577 | if (mark_client_expired(clp)) |
5578 | return 0; | |
44e34da6 BS |
5579 | expire_client(clp); |
5580 | return 1; | |
5581 | } | |
5582 | ||
184c1847 BS |
5583 | u64 nfsd_print_client(struct nfs4_client *clp, u64 num) |
5584 | { | |
5585 | char buf[INET6_ADDRSTRLEN]; | |
0a5c33e2 | 5586 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
184c1847 BS |
5587 | printk(KERN_INFO "NFS Client: %s\n", buf); |
5588 | return 1; | |
5589 | } | |
5590 | ||
5591 | static void nfsd_print_count(struct nfs4_client *clp, unsigned int count, | |
5592 | const char *type) | |
5593 | { | |
5594 | char buf[INET6_ADDRSTRLEN]; | |
0a5c33e2 | 5595 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
184c1847 BS |
5596 | printk(KERN_INFO "NFS Client: %s has %u %s\n", buf, count, type); |
5597 | } | |
5598 | ||
3c87b9b7 TM |
5599 | static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max, |
5600 | void (*func)(struct nfs4_ol_stateid *)) | |
fc29171f BS |
5601 | { |
5602 | struct nfs4_openowner *oop; | |
fc29171f | 5603 | struct nfs4_ol_stateid *stp, *st_next; |
3c87b9b7 | 5604 | struct nfs4_ol_stateid *lst, *lst_next; |
fc29171f BS |
5605 | u64 count = 0; |
5606 | ||
5607 | list_for_each_entry(oop, &clp->cl_openowners, oo_perclient) { | |
3c87b9b7 TM |
5608 | list_for_each_entry_safe(stp, st_next, |
5609 | &oop->oo_owner.so_stateids, st_perstateowner) { | |
5610 | list_for_each_entry_safe(lst, lst_next, | |
5611 | &stp->st_locks, st_locks) { | |
fc29171f | 5612 | if (func) |
3c87b9b7 | 5613 | func(lst); |
fc29171f BS |
5614 | if (++count == max) |
5615 | return count; | |
5616 | } | |
5617 | } | |
5618 | } | |
5619 | ||
5620 | return count; | |
5621 | } | |
5622 | ||
5623 | u64 nfsd_forget_client_locks(struct nfs4_client *clp, u64 max) | |
5624 | { | |
3c87b9b7 | 5625 | return nfsd_foreach_client_lock(clp, max, release_lock_stateid); |
fc29171f BS |
5626 | } |
5627 | ||
184c1847 BS |
5628 | u64 nfsd_print_client_locks(struct nfs4_client *clp, u64 max) |
5629 | { | |
5630 | u64 count = nfsd_foreach_client_lock(clp, max, NULL); | |
5631 | nfsd_print_count(clp, count, "locked files"); | |
5632 | return count; | |
5633 | } | |
5634 | ||
4dbdbda8 BS |
5635 | static u64 nfsd_foreach_client_open(struct nfs4_client *clp, u64 max, void (*func)(struct nfs4_openowner *)) |
5636 | { | |
5637 | struct nfs4_openowner *oop, *next; | |
5638 | u64 count = 0; | |
5639 | ||
5640 | list_for_each_entry_safe(oop, next, &clp->cl_openowners, oo_perclient) { | |
5641 | if (func) | |
5642 | func(oop); | |
5643 | if (++count == max) | |
5644 | break; | |
5645 | } | |
5646 | ||
5647 | return count; | |
5648 | } | |
5649 | ||
5650 | u64 nfsd_forget_client_openowners(struct nfs4_client *clp, u64 max) | |
5651 | { | |
5652 | return nfsd_foreach_client_open(clp, max, release_openowner); | |
5653 | } | |
5654 | ||
184c1847 BS |
5655 | u64 nfsd_print_client_openowners(struct nfs4_client *clp, u64 max) |
5656 | { | |
5657 | u64 count = nfsd_foreach_client_open(clp, max, NULL); | |
5658 | nfsd_print_count(clp, count, "open files"); | |
5659 | return count; | |
5660 | } | |
5661 | ||
269de30f BS |
5662 | static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max, |
5663 | struct list_head *victims) | |
5664 | { | |
5665 | struct nfs4_delegation *dp, *next; | |
5666 | u64 count = 0; | |
5667 | ||
cdc97505 | 5668 | lockdep_assert_held(&state_lock); |
269de30f | 5669 | list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) { |
dff1399f JL |
5670 | if (victims) { |
5671 | /* | |
5672 | * It's not safe to mess with delegations that have a | |
5673 | * non-zero dl_time. They might have already been broken | |
5674 | * and could be processed by the laundromat outside of | |
5675 | * the state_lock. Just leave them be. | |
5676 | */ | |
5677 | if (dp->dl_time != 0) | |
5678 | continue; | |
5679 | ||
42690676 JL |
5680 | unhash_delegation_locked(dp); |
5681 | list_add(&dp->dl_recall_lru, victims); | |
dff1399f | 5682 | } |
269de30f BS |
5683 | if (++count == max) |
5684 | break; | |
5685 | } | |
5686 | return count; | |
5687 | } | |
5688 | ||
5689 | u64 nfsd_forget_client_delegations(struct nfs4_client *clp, u64 max) | |
5690 | { | |
5691 | struct nfs4_delegation *dp, *next; | |
5692 | LIST_HEAD(victims); | |
5693 | u64 count; | |
5694 | ||
cdc97505 | 5695 | spin_lock(&state_lock); |
269de30f | 5696 | count = nfsd_find_all_delegations(clp, max, &victims); |
cdc97505 | 5697 | spin_unlock(&state_lock); |
269de30f | 5698 | |
2d4a532d JL |
5699 | list_for_each_entry_safe(dp, next, &victims, dl_recall_lru) { |
5700 | list_del_init(&dp->dl_recall_lru); | |
3bd64a5b | 5701 | revoke_delegation(dp); |
2d4a532d | 5702 | } |
269de30f BS |
5703 | |
5704 | return count; | |
5705 | } | |
5706 | ||
5707 | u64 nfsd_recall_client_delegations(struct nfs4_client *clp, u64 max) | |
5708 | { | |
dff1399f | 5709 | struct nfs4_delegation *dp; |
269de30f BS |
5710 | LIST_HEAD(victims); |
5711 | u64 count; | |
5712 | ||
cdc97505 | 5713 | spin_lock(&state_lock); |
269de30f | 5714 | count = nfsd_find_all_delegations(clp, max, &victims); |
dff1399f JL |
5715 | while (!list_empty(&victims)) { |
5716 | dp = list_first_entry(&victims, struct nfs4_delegation, | |
5717 | dl_recall_lru); | |
5718 | list_del_init(&dp->dl_recall_lru); | |
5719 | dp->dl_time = 0; | |
269de30f | 5720 | nfsd_break_one_deleg(dp); |
dff1399f | 5721 | } |
cdc97505 | 5722 | spin_unlock(&state_lock); |
269de30f BS |
5723 | |
5724 | return count; | |
5725 | } | |
5726 | ||
184c1847 BS |
5727 | u64 nfsd_print_client_delegations(struct nfs4_client *clp, u64 max) |
5728 | { | |
5729 | u64 count = 0; | |
5730 | ||
cdc97505 | 5731 | spin_lock(&state_lock); |
184c1847 | 5732 | count = nfsd_find_all_delegations(clp, max, NULL); |
cdc97505 | 5733 | spin_unlock(&state_lock); |
184c1847 BS |
5734 | |
5735 | nfsd_print_count(clp, count, "delegations"); | |
5736 | return count; | |
5737 | } | |
5738 | ||
44e34da6 | 5739 | u64 nfsd_for_n_state(u64 max, u64 (*func)(struct nfs4_client *, u64)) |
65178db4 BS |
5740 | { |
5741 | struct nfs4_client *clp, *next; | |
44e34da6 | 5742 | u64 count = 0; |
3320fef1 | 5743 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id); |
65178db4 | 5744 | |
44e34da6 BS |
5745 | if (!nfsd_netns_ready(nn)) |
5746 | return 0; | |
5747 | ||
5ed58bb2 | 5748 | list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { |
44e34da6 BS |
5749 | count += func(clp, max - count); |
5750 | if ((max != 0) && (count >= max)) | |
65178db4 BS |
5751 | break; |
5752 | } | |
65178db4 | 5753 | |
44e34da6 BS |
5754 | return count; |
5755 | } | |
5756 | ||
6c1e82a4 BS |
5757 | struct nfs4_client *nfsd_find_client(struct sockaddr_storage *addr, size_t addr_size) |
5758 | { | |
5759 | struct nfs4_client *clp; | |
5760 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id); | |
5761 | ||
5762 | if (!nfsd_netns_ready(nn)) | |
5763 | return NULL; | |
5764 | ||
5765 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
5766 | if (memcmp(&clp->cl_addr, addr, addr_size) == 0) | |
5767 | return clp; | |
5768 | } | |
5769 | return NULL; | |
5770 | } | |
5771 | ||
65178db4 BS |
5772 | #endif /* CONFIG_NFSD_FAULT_INJECTION */ |
5773 | ||
c2f1a551 MS |
5774 | /* |
5775 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
5776 | * client may quite reasonably hang on to a delegation as long as it has | |
5777 | * the inode cached. This becomes an obvious problem the first time a | |
5778 | * client's inode cache approaches the size of the server's total memory. | |
5779 | * | |
5780 | * For now we avoid this problem by imposing a hard limit on the number | |
5781 | * of delegations, which varies according to the server's memory size. | |
5782 | */ | |
5783 | static void | |
5784 | set_max_delegations(void) | |
5785 | { | |
5786 | /* | |
5787 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
5788 | * estimates suggest that in the worst case (where every delegation | |
5789 | * is for a different inode), a delegation could take about 1.5K, | |
5790 | * giving a worst case usage of about 6% of memory. | |
5791 | */ | |
5792 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
5793 | } | |
5794 | ||
d85ed443 | 5795 | static int nfs4_state_create_net(struct net *net) |
8daae4dc SK |
5796 | { |
5797 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
5798 | int i; | |
5799 | ||
5800 | nn->conf_id_hashtbl = kmalloc(sizeof(struct list_head) * | |
5801 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
5802 | if (!nn->conf_id_hashtbl) | |
382a62e7 | 5803 | goto err; |
0a7ec377 SK |
5804 | nn->unconf_id_hashtbl = kmalloc(sizeof(struct list_head) * |
5805 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
5806 | if (!nn->unconf_id_hashtbl) | |
5807 | goto err_unconf_id; | |
1872de0e SK |
5808 | nn->sessionid_hashtbl = kmalloc(sizeof(struct list_head) * |
5809 | SESSION_HASH_SIZE, GFP_KERNEL); | |
5810 | if (!nn->sessionid_hashtbl) | |
5811 | goto err_sessionid; | |
8daae4dc | 5812 | |
382a62e7 | 5813 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
8daae4dc | 5814 | INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]); |
0a7ec377 | 5815 | INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]); |
382a62e7 | 5816 | } |
1872de0e SK |
5817 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
5818 | INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]); | |
382a62e7 | 5819 | nn->conf_name_tree = RB_ROOT; |
a99454aa | 5820 | nn->unconf_name_tree = RB_ROOT; |
5ed58bb2 | 5821 | INIT_LIST_HEAD(&nn->client_lru); |
73758fed | 5822 | INIT_LIST_HEAD(&nn->close_lru); |
e8c69d17 | 5823 | INIT_LIST_HEAD(&nn->del_recall_lru); |
c9a49628 | 5824 | spin_lock_init(&nn->client_lock); |
8daae4dc | 5825 | |
09121281 | 5826 | INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main); |
d85ed443 | 5827 | get_net(net); |
09121281 | 5828 | |
8daae4dc | 5829 | return 0; |
382a62e7 | 5830 | |
1872de0e | 5831 | err_sessionid: |
9b531137 | 5832 | kfree(nn->unconf_id_hashtbl); |
0a7ec377 SK |
5833 | err_unconf_id: |
5834 | kfree(nn->conf_id_hashtbl); | |
382a62e7 SK |
5835 | err: |
5836 | return -ENOMEM; | |
8daae4dc SK |
5837 | } |
5838 | ||
5839 | static void | |
4dce0ac9 | 5840 | nfs4_state_destroy_net(struct net *net) |
8daae4dc SK |
5841 | { |
5842 | int i; | |
5843 | struct nfs4_client *clp = NULL; | |
5844 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
5845 | ||
5846 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { | |
5847 | while (!list_empty(&nn->conf_id_hashtbl[i])) { | |
5848 | clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
5849 | destroy_client(clp); | |
5850 | } | |
5851 | } | |
a99454aa | 5852 | |
2b905635 KM |
5853 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
5854 | while (!list_empty(&nn->unconf_id_hashtbl[i])) { | |
5855 | clp = list_entry(nn->unconf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
5856 | destroy_client(clp); | |
5857 | } | |
a99454aa SK |
5858 | } |
5859 | ||
1872de0e | 5860 | kfree(nn->sessionid_hashtbl); |
0a7ec377 | 5861 | kfree(nn->unconf_id_hashtbl); |
8daae4dc | 5862 | kfree(nn->conf_id_hashtbl); |
4dce0ac9 | 5863 | put_net(net); |
8daae4dc SK |
5864 | } |
5865 | ||
f252bc68 | 5866 | int |
d85ed443 | 5867 | nfs4_state_start_net(struct net *net) |
ac4d8ff2 | 5868 | { |
5e1533c7 | 5869 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b5a1a81e BF |
5870 | int ret; |
5871 | ||
d85ed443 | 5872 | ret = nfs4_state_create_net(net); |
8daae4dc SK |
5873 | if (ret) |
5874 | return ret; | |
5e1533c7 | 5875 | nfsd4_client_tracking_init(net); |
2c142baa | 5876 | nn->boot_time = get_seconds(); |
5ccb0066 | 5877 | locks_start_grace(net, &nn->nfsd4_manager); |
a51c84ed | 5878 | nn->grace_ended = false; |
d85ed443 | 5879 | printk(KERN_INFO "NFSD: starting %ld-second grace period (net %p)\n", |
5284b44e SK |
5880 | nn->nfsd4_grace, net); |
5881 | queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ); | |
d85ed443 SK |
5882 | return 0; |
5883 | } | |
5884 | ||
5885 | /* initialization to perform when the nfsd service is started: */ | |
5886 | ||
5887 | int | |
5888 | nfs4_state_start(void) | |
5889 | { | |
5890 | int ret; | |
5891 | ||
b5a1a81e | 5892 | ret = set_callback_cred(); |
d85ed443 SK |
5893 | if (ret) |
5894 | return -ENOMEM; | |
58da282b | 5895 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
a6d6b781 JL |
5896 | if (laundry_wq == NULL) { |
5897 | ret = -ENOMEM; | |
5898 | goto out_recovery; | |
5899 | } | |
b5a1a81e BF |
5900 | ret = nfsd4_create_callback_queue(); |
5901 | if (ret) | |
5902 | goto out_free_laundry; | |
09121281 | 5903 | |
c2f1a551 | 5904 | set_max_delegations(); |
d85ed443 | 5905 | |
b5a1a81e | 5906 | return 0; |
d85ed443 | 5907 | |
b5a1a81e BF |
5908 | out_free_laundry: |
5909 | destroy_workqueue(laundry_wq); | |
a6d6b781 | 5910 | out_recovery: |
b5a1a81e | 5911 | return ret; |
1da177e4 LT |
5912 | } |
5913 | ||
f252bc68 | 5914 | void |
4dce0ac9 | 5915 | nfs4_state_shutdown_net(struct net *net) |
1da177e4 | 5916 | { |
1da177e4 | 5917 | struct nfs4_delegation *dp = NULL; |
1da177e4 | 5918 | struct list_head *pos, *next, reaplist; |
4dce0ac9 | 5919 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
1da177e4 | 5920 | |
4dce0ac9 SK |
5921 | cancel_delayed_work_sync(&nn->laundromat_work); |
5922 | locks_end_grace(&nn->nfsd4_manager); | |
ac55fdc4 | 5923 | |
e50a26dc | 5924 | nfs4_lock_state(); |
1da177e4 | 5925 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 5926 | spin_lock(&state_lock); |
e8c69d17 | 5927 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 | 5928 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
42690676 JL |
5929 | unhash_delegation_locked(dp); |
5930 | list_add(&dp->dl_recall_lru, &reaplist); | |
1da177e4 | 5931 | } |
cdc97505 | 5932 | spin_unlock(&state_lock); |
1da177e4 LT |
5933 | list_for_each_safe(pos, next, &reaplist) { |
5934 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
42690676 | 5935 | list_del_init(&dp->dl_recall_lru); |
6011695d | 5936 | nfs4_put_stid(&dp->dl_stid); |
1da177e4 LT |
5937 | } |
5938 | ||
3320fef1 | 5939 | nfsd4_client_tracking_exit(net); |
4dce0ac9 | 5940 | nfs4_state_destroy_net(net); |
e50a26dc | 5941 | nfs4_unlock_state(); |
1da177e4 LT |
5942 | } |
5943 | ||
5944 | void | |
5945 | nfs4_state_shutdown(void) | |
5946 | { | |
5e8d5c29 | 5947 | destroy_workqueue(laundry_wq); |
c3935e30 | 5948 | nfsd4_destroy_callback_queue(); |
1da177e4 | 5949 | } |
8b70484c TM |
5950 | |
5951 | static void | |
5952 | get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
5953 | { | |
37c593c5 TM |
5954 | if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) |
5955 | memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); | |
8b70484c TM |
5956 | } |
5957 | ||
5958 | static void | |
5959 | put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
5960 | { | |
37c593c5 TM |
5961 | if (cstate->minorversion) { |
5962 | memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); | |
5963 | SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
5964 | } | |
5965 | } | |
5966 | ||
5967 | void | |
5968 | clear_current_stateid(struct nfsd4_compound_state *cstate) | |
5969 | { | |
5970 | CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
8b70484c TM |
5971 | } |
5972 | ||
62cd4a59 TM |
5973 | /* |
5974 | * functions to set current state id | |
5975 | */ | |
9428fe1a TM |
5976 | void |
5977 | nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
5978 | { | |
5979 | put_stateid(cstate, &odp->od_stateid); | |
5980 | } | |
5981 | ||
8b70484c TM |
5982 | void |
5983 | nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) | |
5984 | { | |
5985 | put_stateid(cstate, &open->op_stateid); | |
5986 | } | |
5987 | ||
62cd4a59 TM |
5988 | void |
5989 | nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
5990 | { | |
5991 | put_stateid(cstate, &close->cl_stateid); | |
5992 | } | |
5993 | ||
5994 | void | |
5995 | nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) | |
5996 | { | |
5997 | put_stateid(cstate, &lock->lk_resp_stateid); | |
5998 | } | |
5999 | ||
6000 | /* | |
6001 | * functions to consume current state id | |
6002 | */ | |
1e97b519 | 6003 | |
9428fe1a TM |
6004 | void |
6005 | nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
6006 | { | |
6007 | get_stateid(cstate, &odp->od_stateid); | |
6008 | } | |
6009 | ||
6010 | void | |
6011 | nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) | |
6012 | { | |
6013 | get_stateid(cstate, &drp->dr_stateid); | |
6014 | } | |
6015 | ||
1e97b519 TM |
6016 | void |
6017 | nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) | |
6018 | { | |
6019 | get_stateid(cstate, &fsp->fr_stateid); | |
6020 | } | |
6021 | ||
6022 | void | |
6023 | nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) | |
6024 | { | |
6025 | get_stateid(cstate, &setattr->sa_stateid); | |
6026 | } | |
6027 | ||
8b70484c TM |
6028 | void |
6029 | nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
6030 | { | |
6031 | get_stateid(cstate, &close->cl_stateid); | |
6032 | } | |
6033 | ||
6034 | void | |
62cd4a59 | 6035 | nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) |
8b70484c | 6036 | { |
62cd4a59 | 6037 | get_stateid(cstate, &locku->lu_stateid); |
8b70484c | 6038 | } |
30813e27 TM |
6039 | |
6040 | void | |
6041 | nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) | |
6042 | { | |
6043 | get_stateid(cstate, &read->rd_stateid); | |
6044 | } | |
6045 | ||
6046 | void | |
6047 | nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) | |
6048 | { | |
6049 | get_stateid(cstate, &write->wr_stateid); | |
6050 | } |