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 | { | |
940 | if (!atomic_dec_and_test(&sop->so_count)) | |
941 | return; | |
8f4b54c5 | 942 | sop->so_ops->so_unhash(sop); |
6b180f0b JL |
943 | kfree(sop->so_owner.data); |
944 | sop->so_ops->so_free(sop); | |
945 | } | |
946 | ||
dcef0413 | 947 | static void unhash_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 948 | { |
11b9164a | 949 | struct nfs4_file *fp = stp->st_stid.sc_file; |
1d31a253 | 950 | |
1c755dc1 JL |
951 | lockdep_assert_held(&stp->st_stateowner->so_client->cl_lock); |
952 | ||
1d31a253 | 953 | spin_lock(&fp->fi_lock); |
529d7b2a | 954 | list_del(&stp->st_perfile); |
1d31a253 | 955 | spin_unlock(&fp->fi_lock); |
529d7b2a BF |
956 | list_del(&stp->st_perstateowner); |
957 | } | |
958 | ||
6011695d | 959 | static void nfs4_free_ol_stateid(struct nfs4_stid *stid) |
529d7b2a | 960 | { |
6011695d | 961 | struct nfs4_ol_stateid *stp = openlockstateid(stid); |
4665e2ba | 962 | |
6011695d | 963 | release_all_access(stp); |
d3134b10 JL |
964 | if (stp->st_stateowner) |
965 | nfs4_put_stateowner(stp->st_stateowner); | |
6011695d | 966 | kmem_cache_free(stateid_slab, stid); |
529d7b2a BF |
967 | } |
968 | ||
b49e084d | 969 | static void nfs4_free_lock_stateid(struct nfs4_stid *stid) |
529d7b2a | 970 | { |
b49e084d JL |
971 | struct nfs4_ol_stateid *stp = openlockstateid(stid); |
972 | struct nfs4_lockowner *lo = lockowner(stp->st_stateowner); | |
529d7b2a BF |
973 | struct file *file; |
974 | ||
b49e084d JL |
975 | file = find_any_file(stp->st_stid.sc_file); |
976 | if (file) | |
977 | filp_close(file, (fl_owner_t)lo); | |
978 | nfs4_free_ol_stateid(stid); | |
979 | } | |
980 | ||
5adfd885 | 981 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) |
b49e084d | 982 | { |
1c755dc1 JL |
983 | struct nfs4_openowner *oo = openowner(stp->st_openstp->st_stateowner); |
984 | ||
985 | spin_lock(&oo->oo_owner.so_client->cl_lock); | |
3c87b9b7 | 986 | list_del(&stp->st_locks); |
529d7b2a | 987 | unhash_generic_stateid(stp); |
6136d2b4 | 988 | unhash_stid(&stp->st_stid); |
1c755dc1 | 989 | spin_unlock(&oo->oo_owner.so_client->cl_lock); |
6011695d | 990 | nfs4_put_stid(&stp->st_stid); |
529d7b2a BF |
991 | } |
992 | ||
c58c6610 | 993 | static void unhash_lockowner_locked(struct nfs4_lockowner *lo) |
8f4b54c5 | 994 | { |
d4f0489f | 995 | struct nfs4_client *clp = lo->lo_owner.so_client; |
c58c6610 | 996 | |
d4f0489f | 997 | lockdep_assert_held(&clp->cl_lock); |
c58c6610 | 998 | |
8f4b54c5 JL |
999 | list_del_init(&lo->lo_owner.so_strhash); |
1000 | } | |
1001 | ||
1002 | static void release_lockowner_stateids(struct nfs4_lockowner *lo) | |
529d7b2a | 1003 | { |
d4f0489f | 1004 | struct nfs4_client *clp = lo->lo_owner.so_client; |
dcef0413 | 1005 | struct nfs4_ol_stateid *stp; |
529d7b2a | 1006 | |
d4f0489f | 1007 | lockdep_assert_held(&clp->cl_lock); |
c58c6610 | 1008 | |
fe0750e5 BF |
1009 | while (!list_empty(&lo->lo_owner.so_stateids)) { |
1010 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
dcef0413 | 1011 | struct nfs4_ol_stateid, st_perstateowner); |
d4f0489f | 1012 | spin_unlock(&clp->cl_lock); |
5adfd885 | 1013 | release_lock_stateid(stp); |
d4f0489f | 1014 | spin_lock(&clp->cl_lock); |
529d7b2a BF |
1015 | } |
1016 | } | |
1017 | ||
fe0750e5 | 1018 | static void release_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 1019 | { |
d4f0489f | 1020 | struct nfs4_client *clp = lo->lo_owner.so_client; |
c58c6610 | 1021 | |
d4f0489f | 1022 | spin_lock(&clp->cl_lock); |
c58c6610 | 1023 | unhash_lockowner_locked(lo); |
8f4b54c5 | 1024 | release_lockowner_stateids(lo); |
d4f0489f | 1025 | spin_unlock(&clp->cl_lock); |
6b180f0b | 1026 | nfs4_put_stateowner(&lo->lo_owner); |
529d7b2a BF |
1027 | } |
1028 | ||
3c87b9b7 | 1029 | static void release_open_stateid_locks(struct nfs4_ol_stateid *open_stp) |
1c755dc1 JL |
1030 | __releases(&open_stp->st_stateowner->so_client->cl_lock) |
1031 | __acquires(&open_stp->st_stateowner->so_client->cl_lock) | |
3c87b9b7 TM |
1032 | { |
1033 | struct nfs4_ol_stateid *stp; | |
1034 | ||
1035 | while (!list_empty(&open_stp->st_locks)) { | |
1036 | stp = list_entry(open_stp->st_locks.next, | |
1037 | struct nfs4_ol_stateid, st_locks); | |
1c755dc1 | 1038 | spin_unlock(&open_stp->st_stateowner->so_client->cl_lock); |
3c87b9b7 | 1039 | release_lock_stateid(stp); |
1c755dc1 | 1040 | spin_lock(&open_stp->st_stateowner->so_client->cl_lock); |
529d7b2a BF |
1041 | } |
1042 | } | |
1043 | ||
38c387b5 | 1044 | static void unhash_open_stateid(struct nfs4_ol_stateid *stp) |
2283963f | 1045 | { |
1c755dc1 | 1046 | spin_lock(&stp->st_stateowner->so_client->cl_lock); |
2283963f | 1047 | unhash_generic_stateid(stp); |
3c87b9b7 | 1048 | release_open_stateid_locks(stp); |
1c755dc1 | 1049 | spin_unlock(&stp->st_stateowner->so_client->cl_lock); |
38c387b5 BF |
1050 | } |
1051 | ||
1052 | static void release_open_stateid(struct nfs4_ol_stateid *stp) | |
1053 | { | |
1054 | unhash_open_stateid(stp); | |
6011695d | 1055 | nfs4_put_stid(&stp->st_stid); |
2283963f BF |
1056 | } |
1057 | ||
7ffb5880 | 1058 | static void unhash_openowner_locked(struct nfs4_openowner *oo) |
f1d110ca | 1059 | { |
d4f0489f | 1060 | struct nfs4_client *clp = oo->oo_owner.so_client; |
7ffb5880 | 1061 | |
d4f0489f | 1062 | lockdep_assert_held(&clp->cl_lock); |
7ffb5880 | 1063 | |
8f4b54c5 JL |
1064 | list_del_init(&oo->oo_owner.so_strhash); |
1065 | list_del_init(&oo->oo_perclient); | |
f1d110ca BF |
1066 | } |
1067 | ||
f7a4d872 BF |
1068 | static void release_last_closed_stateid(struct nfs4_openowner *oo) |
1069 | { | |
1070 | struct nfs4_ol_stateid *s = oo->oo_last_closed_stid; | |
1071 | ||
1072 | if (s) { | |
d3134b10 | 1073 | list_del_init(&oo->oo_close_lru); |
f7a4d872 | 1074 | oo->oo_last_closed_stid = NULL; |
d3134b10 | 1075 | nfs4_put_stid(&s->st_stid); |
f7a4d872 BF |
1076 | } |
1077 | } | |
1078 | ||
8f4b54c5 JL |
1079 | static void release_openowner_stateids(struct nfs4_openowner *oo) |
1080 | { | |
1081 | struct nfs4_ol_stateid *stp; | |
d4f0489f | 1082 | struct nfs4_client *clp = oo->oo_owner.so_client; |
7ffb5880 | 1083 | |
d4f0489f | 1084 | lockdep_assert_held(&clp->cl_lock); |
8f4b54c5 JL |
1085 | |
1086 | while (!list_empty(&oo->oo_owner.so_stateids)) { | |
1087 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
1088 | struct nfs4_ol_stateid, st_perstateowner); | |
d4f0489f | 1089 | spin_unlock(&clp->cl_lock); |
8f4b54c5 | 1090 | release_open_stateid(stp); |
d4f0489f | 1091 | spin_lock(&clp->cl_lock); |
8f4b54c5 JL |
1092 | } |
1093 | } | |
1094 | ||
fe0750e5 | 1095 | static void release_openowner(struct nfs4_openowner *oo) |
f1d110ca | 1096 | { |
d4f0489f | 1097 | struct nfs4_client *clp = oo->oo_owner.so_client; |
7ffb5880 | 1098 | |
d4f0489f | 1099 | spin_lock(&clp->cl_lock); |
7ffb5880 | 1100 | unhash_openowner_locked(oo); |
8f4b54c5 | 1101 | release_openowner_stateids(oo); |
d4f0489f | 1102 | spin_unlock(&clp->cl_lock); |
f7a4d872 | 1103 | release_last_closed_stateid(oo); |
6b180f0b | 1104 | nfs4_put_stateowner(&oo->oo_owner); |
f1d110ca BF |
1105 | } |
1106 | ||
5282fd72 ME |
1107 | static inline int |
1108 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
1109 | { | |
1110 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
1111 | ||
1112 | return sid->sequence % SESSION_HASH_SIZE; | |
1113 | } | |
1114 | ||
8f199b82 | 1115 | #ifdef NFSD_DEBUG |
5282fd72 ME |
1116 | static inline void |
1117 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
1118 | { | |
1119 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
1120 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
1121 | } | |
8f199b82 TM |
1122 | #else |
1123 | static inline void | |
1124 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
1125 | { | |
1126 | } | |
1127 | #endif | |
1128 | ||
9411b1d4 BF |
1129 | /* |
1130 | * Bump the seqid on cstate->replay_owner, and clear replay_owner if it | |
1131 | * won't be used for replay. | |
1132 | */ | |
1133 | void nfsd4_bump_seqid(struct nfsd4_compound_state *cstate, __be32 nfserr) | |
1134 | { | |
1135 | struct nfs4_stateowner *so = cstate->replay_owner; | |
1136 | ||
1137 | if (nfserr == nfserr_replay_me) | |
1138 | return; | |
1139 | ||
1140 | if (!seqid_mutating_err(ntohl(nfserr))) { | |
58fb12e6 | 1141 | nfsd4_cstate_clear_replay(cstate); |
9411b1d4 BF |
1142 | return; |
1143 | } | |
1144 | if (!so) | |
1145 | return; | |
1146 | if (so->so_is_open_owner) | |
1147 | release_last_closed_stateid(openowner(so)); | |
1148 | so->so_seqid++; | |
1149 | return; | |
1150 | } | |
5282fd72 | 1151 | |
ec6b5d7b AA |
1152 | static void |
1153 | gen_sessionid(struct nfsd4_session *ses) | |
1154 | { | |
1155 | struct nfs4_client *clp = ses->se_client; | |
1156 | struct nfsd4_sessionid *sid; | |
1157 | ||
1158 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
1159 | sid->clientid = clp->cl_clientid; | |
1160 | sid->sequence = current_sessionid++; | |
1161 | sid->reserved = 0; | |
1162 | } | |
1163 | ||
1164 | /* | |
a649637c AA |
1165 | * The protocol defines ca_maxresponssize_cached to include the size of |
1166 | * the rpc header, but all we need to cache is the data starting after | |
1167 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
1168 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
1169 | * value that is the number of bytes in our cache plus a few additional | |
1170 | * bytes. In order to stay on the safe side, and not promise more than | |
1171 | * we can cache, those additional bytes must be the minimum possible: 24 | |
1172 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
1173 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
1174 | * for the SEQUENCE op response: | |
1175 | */ | |
1176 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
1177 | ||
557ce264 AA |
1178 | static void |
1179 | free_session_slots(struct nfsd4_session *ses) | |
1180 | { | |
1181 | int i; | |
1182 | ||
1183 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
1184 | kfree(ses->se_slots[i]); | |
1185 | } | |
1186 | ||
a649637c | 1187 | /* |
efe0cb6d BF |
1188 | * We don't actually need to cache the rpc and session headers, so we |
1189 | * can allocate a little less for each slot: | |
1190 | */ | |
55c760cf | 1191 | static inline u32 slot_bytes(struct nfsd4_channel_attrs *ca) |
efe0cb6d | 1192 | { |
55c760cf | 1193 | u32 size; |
efe0cb6d | 1194 | |
55c760cf BF |
1195 | if (ca->maxresp_cached < NFSD_MIN_HDR_SEQ_SZ) |
1196 | size = 0; | |
1197 | else | |
1198 | size = ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
1199 | return size + sizeof(struct nfsd4_slot); | |
5b6feee9 | 1200 | } |
ec6b5d7b | 1201 | |
5b6feee9 BF |
1202 | /* |
1203 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c | 1204 | * re-negotiate active sessions and reduce their slot usage to make |
42b2aa86 | 1205 | * room for new connections. For now we just fail the create session. |
ec6b5d7b | 1206 | */ |
55c760cf | 1207 | static u32 nfsd4_get_drc_mem(struct nfsd4_channel_attrs *ca) |
ec6b5d7b | 1208 | { |
55c760cf BF |
1209 | u32 slotsize = slot_bytes(ca); |
1210 | u32 num = ca->maxreqs; | |
5b6feee9 | 1211 | int avail; |
ec6b5d7b | 1212 | |
5b6feee9 | 1213 | spin_lock(&nfsd_drc_lock); |
697ce9be ZY |
1214 | avail = min((unsigned long)NFSD_MAX_MEM_PER_SESSION, |
1215 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
5b6feee9 BF |
1216 | num = min_t(int, num, avail / slotsize); |
1217 | nfsd_drc_mem_used += num * slotsize; | |
1218 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 1219 | |
5b6feee9 BF |
1220 | return num; |
1221 | } | |
ec6b5d7b | 1222 | |
55c760cf | 1223 | static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs *ca) |
5b6feee9 | 1224 | { |
55c760cf BF |
1225 | int slotsize = slot_bytes(ca); |
1226 | ||
4bd9b0f4 | 1227 | spin_lock(&nfsd_drc_lock); |
55c760cf | 1228 | nfsd_drc_mem_used -= slotsize * ca->maxreqs; |
4bd9b0f4 | 1229 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 1230 | } |
ec6b5d7b | 1231 | |
60810e54 KM |
1232 | static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fattrs, |
1233 | struct nfsd4_channel_attrs *battrs) | |
5b6feee9 | 1234 | { |
60810e54 KM |
1235 | int numslots = fattrs->maxreqs; |
1236 | int slotsize = slot_bytes(fattrs); | |
5b6feee9 BF |
1237 | struct nfsd4_session *new; |
1238 | int mem, i; | |
a649637c | 1239 | |
5b6feee9 BF |
1240 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
1241 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
1242 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 1243 | |
5b6feee9 BF |
1244 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
1245 | if (!new) | |
1246 | return NULL; | |
557ce264 | 1247 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 | 1248 | for (i = 0; i < numslots; i++) { |
55c760cf | 1249 | new->se_slots[i] = kzalloc(slotsize, GFP_KERNEL); |
5b6feee9 | 1250 | if (!new->se_slots[i]) |
557ce264 | 1251 | goto out_free; |
557ce264 | 1252 | } |
60810e54 KM |
1253 | |
1254 | memcpy(&new->se_fchannel, fattrs, sizeof(struct nfsd4_channel_attrs)); | |
1255 | memcpy(&new->se_bchannel, battrs, sizeof(struct nfsd4_channel_attrs)); | |
1256 | ||
5b6feee9 BF |
1257 | return new; |
1258 | out_free: | |
1259 | while (i--) | |
1260 | kfree(new->se_slots[i]); | |
1261 | kfree(new); | |
1262 | return NULL; | |
ec6b5d7b AA |
1263 | } |
1264 | ||
19cf5c02 BF |
1265 | static void free_conn(struct nfsd4_conn *c) |
1266 | { | |
1267 | svc_xprt_put(c->cn_xprt); | |
1268 | kfree(c); | |
1269 | } | |
ec6b5d7b | 1270 | |
19cf5c02 BF |
1271 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
1272 | { | |
1273 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
1274 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 1275 | |
19cf5c02 BF |
1276 | spin_lock(&clp->cl_lock); |
1277 | if (!list_empty(&c->cn_persession)) { | |
1278 | list_del(&c->cn_persession); | |
1279 | free_conn(c); | |
1280 | } | |
eea49806 | 1281 | nfsd4_probe_callback(clp); |
2e4b7239 | 1282 | spin_unlock(&clp->cl_lock); |
19cf5c02 | 1283 | } |
ec6b5d7b | 1284 | |
d29c374c | 1285 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 1286 | { |
c7662518 | 1287 | struct nfsd4_conn *conn; |
ec6b5d7b | 1288 | |
c7662518 BF |
1289 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
1290 | if (!conn) | |
db90681d | 1291 | return NULL; |
c7662518 BF |
1292 | svc_xprt_get(rqstp->rq_xprt); |
1293 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 1294 | conn->cn_flags = flags; |
db90681d BF |
1295 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
1296 | return conn; | |
1297 | } | |
a649637c | 1298 | |
328ead28 BF |
1299 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
1300 | { | |
1301 | conn->cn_session = ses; | |
1302 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
1303 | } |
1304 | ||
db90681d | 1305 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 1306 | { |
db90681d | 1307 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 1308 | |
c7662518 | 1309 | spin_lock(&clp->cl_lock); |
328ead28 | 1310 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 1311 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
1312 | } |
1313 | ||
21b75b01 | 1314 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 1315 | { |
19cf5c02 | 1316 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 1317 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
1318 | } |
1319 | ||
e1ff371f | 1320 | static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses) |
ec6b5d7b | 1321 | { |
21b75b01 | 1322 | int ret; |
ec6b5d7b | 1323 | |
db90681d | 1324 | nfsd4_hash_conn(conn, ses); |
21b75b01 BF |
1325 | ret = nfsd4_register_conn(conn); |
1326 | if (ret) | |
1327 | /* oops; xprt is already down: */ | |
1328 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
57a37144 BF |
1329 | /* We may have gained or lost a callback channel: */ |
1330 | nfsd4_probe_callback_sync(ses->se_client); | |
c7662518 | 1331 | } |
ec6b5d7b | 1332 | |
e1ff371f | 1333 | static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses) |
1d1bc8f2 BF |
1334 | { |
1335 | u32 dir = NFS4_CDFC4_FORE; | |
1336 | ||
e1ff371f | 1337 | if (cses->flags & SESSION4_BACK_CHAN) |
1d1bc8f2 | 1338 | dir |= NFS4_CDFC4_BACK; |
e1ff371f | 1339 | return alloc_conn(rqstp, dir); |
1d1bc8f2 BF |
1340 | } |
1341 | ||
1342 | /* must be called under client_lock */ | |
19cf5c02 | 1343 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 1344 | { |
19cf5c02 BF |
1345 | struct nfs4_client *clp = s->se_client; |
1346 | struct nfsd4_conn *c; | |
ec6b5d7b | 1347 | |
19cf5c02 BF |
1348 | spin_lock(&clp->cl_lock); |
1349 | while (!list_empty(&s->se_conns)) { | |
1350 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
1351 | list_del_init(&c->cn_persession); | |
1352 | spin_unlock(&clp->cl_lock); | |
557ce264 | 1353 | |
19cf5c02 BF |
1354 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
1355 | free_conn(c); | |
ec6b5d7b | 1356 | |
19cf5c02 BF |
1357 | spin_lock(&clp->cl_lock); |
1358 | } | |
1359 | spin_unlock(&clp->cl_lock); | |
c7662518 | 1360 | } |
ec6b5d7b | 1361 | |
1377b69e BF |
1362 | static void __free_session(struct nfsd4_session *ses) |
1363 | { | |
1377b69e BF |
1364 | free_session_slots(ses); |
1365 | kfree(ses); | |
1366 | } | |
1367 | ||
66b2b9b2 | 1368 | static void free_session(struct nfsd4_session *ses) |
c7662518 | 1369 | { |
66b2b9b2 | 1370 | struct nfsd_net *nn = net_generic(ses->se_client->net, nfsd_net_id); |
c9a49628 SK |
1371 | |
1372 | lockdep_assert_held(&nn->client_lock); | |
19cf5c02 | 1373 | nfsd4_del_conns(ses); |
55c760cf | 1374 | nfsd4_put_drc_mem(&ses->se_fchannel); |
1377b69e | 1375 | __free_session(ses); |
c7662518 BF |
1376 | } |
1377 | ||
135ae827 | 1378 | static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
a827bcb2 | 1379 | { |
a827bcb2 | 1380 | int idx; |
1872de0e | 1381 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
a827bcb2 | 1382 | |
ec6b5d7b AA |
1383 | new->se_client = clp; |
1384 | gen_sessionid(new); | |
ec6b5d7b | 1385 | |
c7662518 BF |
1386 | INIT_LIST_HEAD(&new->se_conns); |
1387 | ||
ac7c46f2 | 1388 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 1389 | new->se_flags = cses->flags; |
8b5ce5cd | 1390 | new->se_cb_prog = cses->callback_prog; |
c6bb3ca2 | 1391 | new->se_cb_sec = cses->cb_sec; |
66b2b9b2 | 1392 | atomic_set(&new->se_ref, 0); |
5b6feee9 | 1393 | idx = hash_sessionid(&new->se_sessionid); |
c9a49628 | 1394 | spin_lock(&nn->client_lock); |
1872de0e | 1395 | list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]); |
4c649378 | 1396 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 1397 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 1398 | spin_unlock(&clp->cl_lock); |
c9a49628 | 1399 | spin_unlock(&nn->client_lock); |
60810e54 | 1400 | |
dcbeaa68 | 1401 | if (cses->flags & SESSION4_BACK_CHAN) { |
edd76786 | 1402 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
1403 | /* |
1404 | * This is a little silly; with sessions there's no real | |
1405 | * use for the callback address. Use the peer address | |
1406 | * as a reasonable default for now, but consider fixing | |
1407 | * the rpc client not to require an address in the | |
1408 | * future: | |
1409 | */ | |
edd76786 BF |
1410 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
1411 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 1412 | } |
ec6b5d7b AA |
1413 | } |
1414 | ||
9089f1b4 | 1415 | /* caller must hold client_lock */ |
5282fd72 | 1416 | static struct nfsd4_session * |
d4e19e70 | 1417 | __find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net) |
5282fd72 ME |
1418 | { |
1419 | struct nfsd4_session *elem; | |
1420 | int idx; | |
1872de0e | 1421 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
5282fd72 ME |
1422 | |
1423 | dump_sessionid(__func__, sessionid); | |
1424 | idx = hash_sessionid(sessionid); | |
5282fd72 | 1425 | /* Search in the appropriate list */ |
1872de0e | 1426 | list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) { |
5282fd72 ME |
1427 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
1428 | NFS4_MAX_SESSIONID_LEN)) { | |
1429 | return elem; | |
1430 | } | |
1431 | } | |
1432 | ||
1433 | dprintk("%s: session not found\n", __func__); | |
1434 | return NULL; | |
1435 | } | |
1436 | ||
d4e19e70 TM |
1437 | static struct nfsd4_session * |
1438 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net, | |
1439 | __be32 *ret) | |
1440 | { | |
1441 | struct nfsd4_session *session; | |
1442 | __be32 status = nfserr_badsession; | |
1443 | ||
1444 | session = __find_in_sessionid_hashtbl(sessionid, net); | |
1445 | if (!session) | |
1446 | goto out; | |
1447 | status = nfsd4_get_session_locked(session); | |
1448 | if (status) | |
1449 | session = NULL; | |
1450 | out: | |
1451 | *ret = status; | |
1452 | return session; | |
1453 | } | |
1454 | ||
9089f1b4 | 1455 | /* caller must hold client_lock */ |
7116ed6b | 1456 | static void |
5282fd72 | 1457 | unhash_session(struct nfsd4_session *ses) |
7116ed6b AA |
1458 | { |
1459 | list_del(&ses->se_hash); | |
4c649378 | 1460 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 1461 | list_del(&ses->se_perclnt); |
4c649378 | 1462 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
1463 | } |
1464 | ||
1da177e4 LT |
1465 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
1466 | static int | |
2c142baa | 1467 | STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn) |
1da177e4 | 1468 | { |
2c142baa | 1469 | if (clid->cl_boot == nn->boot_time) |
1da177e4 | 1470 | return 0; |
60adfc50 | 1471 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
2c142baa | 1472 | clid->cl_boot, clid->cl_id, nn->boot_time); |
1da177e4 LT |
1473 | return 1; |
1474 | } | |
1475 | ||
1476 | /* | |
1477 | * XXX Should we use a slab cache ? | |
1478 | * This type of memory management is somewhat inefficient, but we use it | |
1479 | * anyway since SETCLIENTID is not a common operation. | |
1480 | */ | |
35bba9a3 | 1481 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
1482 | { |
1483 | struct nfs4_client *clp; | |
d4f0489f | 1484 | int i; |
1da177e4 | 1485 | |
35bba9a3 BF |
1486 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
1487 | if (clp == NULL) | |
1488 | return NULL; | |
67114fe6 | 1489 | clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); |
d4f0489f TM |
1490 | if (clp->cl_name.data == NULL) |
1491 | goto err_no_name; | |
1492 | clp->cl_ownerstr_hashtbl = kmalloc(sizeof(struct list_head) * | |
1493 | OWNER_HASH_SIZE, GFP_KERNEL); | |
1494 | if (!clp->cl_ownerstr_hashtbl) | |
1495 | goto err_no_hashtbl; | |
1496 | for (i = 0; i < OWNER_HASH_SIZE; i++) | |
1497 | INIT_LIST_HEAD(&clp->cl_ownerstr_hashtbl[i]); | |
35bba9a3 | 1498 | clp->cl_name.len = name.len; |
5694c93e TM |
1499 | INIT_LIST_HEAD(&clp->cl_sessions); |
1500 | idr_init(&clp->cl_stateids); | |
1501 | atomic_set(&clp->cl_refcount, 0); | |
1502 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; | |
1503 | INIT_LIST_HEAD(&clp->cl_idhash); | |
1504 | INIT_LIST_HEAD(&clp->cl_openowners); | |
1505 | INIT_LIST_HEAD(&clp->cl_delegations); | |
1506 | INIT_LIST_HEAD(&clp->cl_lru); | |
1507 | INIT_LIST_HEAD(&clp->cl_callbacks); | |
1508 | INIT_LIST_HEAD(&clp->cl_revoked); | |
1509 | spin_lock_init(&clp->cl_lock); | |
1510 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1da177e4 | 1511 | return clp; |
d4f0489f TM |
1512 | err_no_hashtbl: |
1513 | kfree(clp->cl_name.data); | |
1514 | err_no_name: | |
1515 | kfree(clp); | |
1516 | return NULL; | |
1da177e4 LT |
1517 | } |
1518 | ||
4dd86e15 | 1519 | static void |
1da177e4 LT |
1520 | free_client(struct nfs4_client *clp) |
1521 | { | |
bca0ec65 | 1522 | struct nfsd_net __maybe_unused *nn = net_generic(clp->net, nfsd_net_id); |
c9a49628 SK |
1523 | |
1524 | lockdep_assert_held(&nn->client_lock); | |
792c95dd BF |
1525 | while (!list_empty(&clp->cl_sessions)) { |
1526 | struct nfsd4_session *ses; | |
1527 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
1528 | se_perclnt); | |
1529 | list_del(&ses->se_perclnt); | |
66b2b9b2 BF |
1530 | WARN_ON_ONCE(atomic_read(&ses->se_ref)); |
1531 | free_session(ses); | |
792c95dd | 1532 | } |
4cb57e30 | 1533 | rpc_destroy_wait_queue(&clp->cl_cb_waitq); |
03a4e1f6 | 1534 | free_svc_cred(&clp->cl_cred); |
d4f0489f | 1535 | kfree(clp->cl_ownerstr_hashtbl); |
1da177e4 | 1536 | kfree(clp->cl_name.data); |
2d32b29a | 1537 | idr_destroy(&clp->cl_stateids); |
1da177e4 LT |
1538 | kfree(clp); |
1539 | } | |
1540 | ||
84d38ac9 BH |
1541 | /* must be called under the client_lock */ |
1542 | static inline void | |
1543 | unhash_client_locked(struct nfs4_client *clp) | |
1544 | { | |
792c95dd BF |
1545 | struct nfsd4_session *ses; |
1546 | ||
84d38ac9 | 1547 | list_del(&clp->cl_lru); |
4c649378 | 1548 | spin_lock(&clp->cl_lock); |
792c95dd BF |
1549 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
1550 | list_del_init(&ses->se_hash); | |
4c649378 | 1551 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
1552 | } |
1553 | ||
1da177e4 | 1554 | static void |
0d22f68f | 1555 | destroy_client(struct nfs4_client *clp) |
1da177e4 | 1556 | { |
fe0750e5 | 1557 | struct nfs4_openowner *oo; |
1da177e4 | 1558 | struct nfs4_delegation *dp; |
1da177e4 | 1559 | struct list_head reaplist; |
382a62e7 | 1560 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 1561 | |
1da177e4 | 1562 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 1563 | spin_lock(&state_lock); |
ea1da636 N |
1564 | while (!list_empty(&clp->cl_delegations)) { |
1565 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
42690676 JL |
1566 | unhash_delegation_locked(dp); |
1567 | list_add(&dp->dl_recall_lru, &reaplist); | |
1da177e4 | 1568 | } |
cdc97505 | 1569 | spin_unlock(&state_lock); |
1da177e4 LT |
1570 | while (!list_empty(&reaplist)) { |
1571 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
42690676 | 1572 | list_del_init(&dp->dl_recall_lru); |
6011695d | 1573 | nfs4_put_stid(&dp->dl_stid); |
1da177e4 | 1574 | } |
2d4a532d | 1575 | while (!list_empty(&clp->cl_revoked)) { |
956c4fee | 1576 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); |
2d4a532d | 1577 | list_del_init(&dp->dl_recall_lru); |
6011695d | 1578 | nfs4_put_stid(&dp->dl_stid); |
956c4fee | 1579 | } |
ea1da636 | 1580 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 | 1581 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
d3134b10 | 1582 | atomic_inc(&oo->oo_owner.so_count); |
fe0750e5 | 1583 | release_openowner(oo); |
1da177e4 | 1584 | } |
6ff8da08 | 1585 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
1586 | if (clp->cl_cb_conn.cb_xprt) |
1587 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
36acb66b | 1588 | list_del(&clp->cl_idhash); |
ac55fdc4 | 1589 | if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) |
382a62e7 | 1590 | rb_erase(&clp->cl_namenode, &nn->conf_name_tree); |
ac55fdc4 | 1591 | else |
a99454aa | 1592 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
c9a49628 | 1593 | spin_lock(&nn->client_lock); |
84d38ac9 | 1594 | unhash_client_locked(clp); |
221a6876 BF |
1595 | WARN_ON_ONCE(atomic_read(&clp->cl_refcount)); |
1596 | free_client(clp); | |
c9a49628 | 1597 | spin_unlock(&nn->client_lock); |
1da177e4 LT |
1598 | } |
1599 | ||
0d22f68f BF |
1600 | static void expire_client(struct nfs4_client *clp) |
1601 | { | |
1602 | nfsd4_client_record_remove(clp); | |
1603 | destroy_client(clp); | |
1604 | } | |
1605 | ||
35bba9a3 BF |
1606 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
1607 | { | |
1608 | memcpy(target->cl_verifier.data, source->data, | |
1609 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
1610 | } |
1611 | ||
35bba9a3 BF |
1612 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
1613 | { | |
1da177e4 LT |
1614 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
1615 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
1616 | } | |
1617 | ||
03a4e1f6 | 1618 | static int copy_cred(struct svc_cred *target, struct svc_cred *source) |
35bba9a3 | 1619 | { |
03a4e1f6 BF |
1620 | if (source->cr_principal) { |
1621 | target->cr_principal = | |
1622 | kstrdup(source->cr_principal, GFP_KERNEL); | |
1623 | if (target->cr_principal == NULL) | |
1624 | return -ENOMEM; | |
1625 | } else | |
1626 | target->cr_principal = NULL; | |
d5497fc6 | 1627 | target->cr_flavor = source->cr_flavor; |
1da177e4 LT |
1628 | target->cr_uid = source->cr_uid; |
1629 | target->cr_gid = source->cr_gid; | |
1630 | target->cr_group_info = source->cr_group_info; | |
1631 | get_group_info(target->cr_group_info); | |
0dc1531a BF |
1632 | target->cr_gss_mech = source->cr_gss_mech; |
1633 | if (source->cr_gss_mech) | |
1634 | gss_mech_get(source->cr_gss_mech); | |
03a4e1f6 | 1635 | return 0; |
1da177e4 LT |
1636 | } |
1637 | ||
ac55fdc4 JL |
1638 | static long long |
1639 | compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2) | |
1640 | { | |
1641 | long long res; | |
1642 | ||
1643 | res = o1->len - o2->len; | |
1644 | if (res) | |
1645 | return res; | |
1646 | return (long long)memcmp(o1->data, o2->data, o1->len); | |
1647 | } | |
1648 | ||
35bba9a3 | 1649 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 1650 | { |
a55370a3 | 1651 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
1652 | } |
1653 | ||
1654 | static int | |
599e0a22 BF |
1655 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1656 | { | |
1657 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
1658 | } |
1659 | ||
1660 | static int | |
599e0a22 BF |
1661 | same_clid(clientid_t *cl1, clientid_t *cl2) |
1662 | { | |
1663 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1664 | } |
1665 | ||
8fbba96e BF |
1666 | static bool groups_equal(struct group_info *g1, struct group_info *g2) |
1667 | { | |
1668 | int i; | |
1669 | ||
1670 | if (g1->ngroups != g2->ngroups) | |
1671 | return false; | |
1672 | for (i=0; i<g1->ngroups; i++) | |
6fab8779 | 1673 | if (!gid_eq(GROUP_AT(g1, i), GROUP_AT(g2, i))) |
8fbba96e BF |
1674 | return false; |
1675 | return true; | |
1676 | } | |
1677 | ||
68eb3508 BF |
1678 | /* |
1679 | * RFC 3530 language requires clid_inuse be returned when the | |
1680 | * "principal" associated with a requests differs from that previously | |
1681 | * used. We use uid, gid's, and gss principal string as our best | |
1682 | * approximation. We also don't want to allow non-gss use of a client | |
1683 | * established using gss: in theory cr_principal should catch that | |
1684 | * change, but in practice cr_principal can be null even in the gss case | |
1685 | * since gssd doesn't always pass down a principal string. | |
1686 | */ | |
1687 | static bool is_gss_cred(struct svc_cred *cr) | |
1688 | { | |
1689 | /* Is cr_flavor one of the gss "pseudoflavors"?: */ | |
1690 | return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR); | |
1691 | } | |
1692 | ||
1693 | ||
5559b50a | 1694 | static bool |
599e0a22 BF |
1695 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
1696 | { | |
68eb3508 | 1697 | if ((is_gss_cred(cr1) != is_gss_cred(cr2)) |
6fab8779 EB |
1698 | || (!uid_eq(cr1->cr_uid, cr2->cr_uid)) |
1699 | || (!gid_eq(cr1->cr_gid, cr2->cr_gid)) | |
8fbba96e BF |
1700 | || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) |
1701 | return false; | |
1702 | if (cr1->cr_principal == cr2->cr_principal) | |
1703 | return true; | |
1704 | if (!cr1->cr_principal || !cr2->cr_principal) | |
1705 | return false; | |
5559b50a | 1706 | return 0 == strcmp(cr1->cr_principal, cr2->cr_principal); |
1da177e4 LT |
1707 | } |
1708 | ||
57266a6e BF |
1709 | static bool svc_rqst_integrity_protected(struct svc_rqst *rqstp) |
1710 | { | |
1711 | struct svc_cred *cr = &rqstp->rq_cred; | |
1712 | u32 service; | |
1713 | ||
c4720591 BF |
1714 | if (!cr->cr_gss_mech) |
1715 | return false; | |
57266a6e BF |
1716 | service = gss_pseudoflavor_to_service(cr->cr_gss_mech, cr->cr_flavor); |
1717 | return service == RPC_GSS_SVC_INTEGRITY || | |
1718 | service == RPC_GSS_SVC_PRIVACY; | |
1719 | } | |
1720 | ||
1721 | static bool mach_creds_match(struct nfs4_client *cl, struct svc_rqst *rqstp) | |
1722 | { | |
1723 | struct svc_cred *cr = &rqstp->rq_cred; | |
1724 | ||
1725 | if (!cl->cl_mach_cred) | |
1726 | return true; | |
1727 | if (cl->cl_cred.cr_gss_mech != cr->cr_gss_mech) | |
1728 | return false; | |
1729 | if (!svc_rqst_integrity_protected(rqstp)) | |
1730 | return false; | |
1731 | if (!cr->cr_principal) | |
1732 | return false; | |
1733 | return 0 == strcmp(cl->cl_cred.cr_principal, cr->cr_principal); | |
1734 | } | |
1735 | ||
c212cecf | 1736 | static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn) |
5ec7b46c BF |
1737 | { |
1738 | static u32 current_clientid = 1; | |
1739 | ||
2c142baa | 1740 | clp->cl_clientid.cl_boot = nn->boot_time; |
1da177e4 LT |
1741 | clp->cl_clientid.cl_id = current_clientid++; |
1742 | } | |
1743 | ||
deda2faa BF |
1744 | static void gen_confirm(struct nfs4_client *clp) |
1745 | { | |
ab4684d1 | 1746 | __be32 verf[2]; |
deda2faa | 1747 | static u32 i; |
1da177e4 | 1748 | |
f419992c JL |
1749 | /* |
1750 | * This is opaque to client, so no need to byte-swap. Use | |
1751 | * __force to keep sparse happy | |
1752 | */ | |
1753 | verf[0] = (__force __be32)get_seconds(); | |
1754 | verf[1] = (__force __be32)i++; | |
ab4684d1 | 1755 | memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); |
1da177e4 LT |
1756 | } |
1757 | ||
4770d722 JL |
1758 | static struct nfs4_stid * |
1759 | find_stateid_locked(struct nfs4_client *cl, stateid_t *t) | |
4581d140 | 1760 | { |
3abdb607 BF |
1761 | struct nfs4_stid *ret; |
1762 | ||
1763 | ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id); | |
1764 | if (!ret || !ret->sc_type) | |
1765 | return NULL; | |
1766 | return ret; | |
4d71ab87 BF |
1767 | } |
1768 | ||
4770d722 JL |
1769 | static struct nfs4_stid * |
1770 | find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) | |
f459e453 BF |
1771 | { |
1772 | struct nfs4_stid *s; | |
4d71ab87 | 1773 | |
4770d722 JL |
1774 | spin_lock(&cl->cl_lock); |
1775 | s = find_stateid_locked(cl, t); | |
2d3f9668 TM |
1776 | if (s != NULL) { |
1777 | if (typemask & s->sc_type) | |
1778 | atomic_inc(&s->sc_count); | |
1779 | else | |
1780 | s = NULL; | |
1781 | } | |
4770d722 JL |
1782 | spin_unlock(&cl->cl_lock); |
1783 | return s; | |
4581d140 BF |
1784 | } |
1785 | ||
2216d449 | 1786 | static struct nfs4_client *create_client(struct xdr_netobj name, |
b09333c4 RL |
1787 | struct svc_rqst *rqstp, nfs4_verifier *verf) |
1788 | { | |
1789 | struct nfs4_client *clp; | |
1790 | struct sockaddr *sa = svc_addr(rqstp); | |
03a4e1f6 | 1791 | int ret; |
c212cecf | 1792 | struct net *net = SVC_NET(rqstp); |
c9a49628 | 1793 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b09333c4 RL |
1794 | |
1795 | clp = alloc_client(name); | |
1796 | if (clp == NULL) | |
1797 | return NULL; | |
1798 | ||
03a4e1f6 BF |
1799 | ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); |
1800 | if (ret) { | |
c9a49628 | 1801 | spin_lock(&nn->client_lock); |
03a4e1f6 | 1802 | free_client(clp); |
c9a49628 | 1803 | spin_unlock(&nn->client_lock); |
03a4e1f6 | 1804 | return NULL; |
b09333c4 | 1805 | } |
02e1215f | 1806 | INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_run_cb_null); |
07cd4909 | 1807 | clp->cl_time = get_seconds(); |
b09333c4 | 1808 | clear_bit(0, &clp->cl_cb_slot_busy); |
b09333c4 RL |
1809 | copy_verf(clp, verf); |
1810 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
b09333c4 | 1811 | gen_confirm(clp); |
edd76786 | 1812 | clp->cl_cb_session = NULL; |
c212cecf | 1813 | clp->net = net; |
b09333c4 RL |
1814 | return clp; |
1815 | } | |
1816 | ||
fd39ca9a | 1817 | static void |
ac55fdc4 JL |
1818 | add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root) |
1819 | { | |
1820 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
1821 | struct nfs4_client *clp; | |
1822 | ||
1823 | while (*new) { | |
1824 | clp = rb_entry(*new, struct nfs4_client, cl_namenode); | |
1825 | parent = *new; | |
1826 | ||
1827 | if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0) | |
1828 | new = &((*new)->rb_left); | |
1829 | else | |
1830 | new = &((*new)->rb_right); | |
1831 | } | |
1832 | ||
1833 | rb_link_node(&new_clp->cl_namenode, parent, new); | |
1834 | rb_insert_color(&new_clp->cl_namenode, root); | |
1835 | } | |
1836 | ||
1837 | static struct nfs4_client * | |
1838 | find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root) | |
1839 | { | |
1840 | long long cmp; | |
1841 | struct rb_node *node = root->rb_node; | |
1842 | struct nfs4_client *clp; | |
1843 | ||
1844 | while (node) { | |
1845 | clp = rb_entry(node, struct nfs4_client, cl_namenode); | |
1846 | cmp = compare_blob(&clp->cl_name, name); | |
1847 | if (cmp > 0) | |
1848 | node = node->rb_left; | |
1849 | else if (cmp < 0) | |
1850 | node = node->rb_right; | |
1851 | else | |
1852 | return clp; | |
1853 | } | |
1854 | return NULL; | |
1855 | } | |
1856 | ||
1857 | static void | |
1858 | add_to_unconfirmed(struct nfs4_client *clp) | |
1da177e4 LT |
1859 | { |
1860 | unsigned int idhashval; | |
0a7ec377 | 1861 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 1862 | |
ac55fdc4 | 1863 | clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
a99454aa | 1864 | add_clp_to_name_tree(clp, &nn->unconf_name_tree); |
1da177e4 | 1865 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
0a7ec377 | 1866 | list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]); |
36acb66b | 1867 | renew_client(clp); |
1da177e4 LT |
1868 | } |
1869 | ||
fd39ca9a | 1870 | static void |
1da177e4 LT |
1871 | move_to_confirmed(struct nfs4_client *clp) |
1872 | { | |
1873 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
8daae4dc | 1874 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 LT |
1875 | |
1876 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
8daae4dc | 1877 | list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]); |
a99454aa | 1878 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
382a62e7 | 1879 | add_clp_to_name_tree(clp, &nn->conf_name_tree); |
ac55fdc4 | 1880 | set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
1da177e4 LT |
1881 | renew_client(clp); |
1882 | } | |
1883 | ||
1884 | static struct nfs4_client * | |
bfa85e83 | 1885 | find_client_in_id_table(struct list_head *tbl, clientid_t *clid, bool sessions) |
1da177e4 LT |
1886 | { |
1887 | struct nfs4_client *clp; | |
1888 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1889 | ||
bfa85e83 | 1890 | list_for_each_entry(clp, &tbl[idhashval], cl_idhash) { |
a50d2ad1 | 1891 | if (same_clid(&clp->cl_clientid, clid)) { |
d15c077e BF |
1892 | if ((bool)clp->cl_minorversion != sessions) |
1893 | return NULL; | |
a50d2ad1 | 1894 | renew_client(clp); |
1da177e4 | 1895 | return clp; |
a50d2ad1 | 1896 | } |
1da177e4 LT |
1897 | } |
1898 | return NULL; | |
1899 | } | |
1900 | ||
bfa85e83 BF |
1901 | static struct nfs4_client * |
1902 | find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) | |
1903 | { | |
1904 | struct list_head *tbl = nn->conf_id_hashtbl; | |
1905 | ||
1906 | return find_client_in_id_table(tbl, clid, sessions); | |
1907 | } | |
1908 | ||
1da177e4 | 1909 | static struct nfs4_client * |
0a7ec377 | 1910 | find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
1da177e4 | 1911 | { |
bfa85e83 | 1912 | struct list_head *tbl = nn->unconf_id_hashtbl; |
1da177e4 | 1913 | |
bfa85e83 | 1914 | return find_client_in_id_table(tbl, clid, sessions); |
1da177e4 LT |
1915 | } |
1916 | ||
6e5f15c9 | 1917 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 1918 | { |
6e5f15c9 | 1919 | return clp->cl_exchange_flags != 0; |
e203d506 | 1920 | } |
a1bcecd2 | 1921 | |
28ce6054 | 1922 | static struct nfs4_client * |
382a62e7 | 1923 | find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 1924 | { |
382a62e7 | 1925 | return find_clp_in_name_tree(name, &nn->conf_name_tree); |
28ce6054 N |
1926 | } |
1927 | ||
1928 | static struct nfs4_client * | |
a99454aa | 1929 | find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 1930 | { |
a99454aa | 1931 | return find_clp_in_name_tree(name, &nn->unconf_name_tree); |
28ce6054 N |
1932 | } |
1933 | ||
fd39ca9a | 1934 | static void |
6f3d772f | 1935 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 1936 | { |
07263f1e | 1937 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
1938 | struct sockaddr *sa = svc_addr(rqstp); |
1939 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
1940 | unsigned short expected_family; |
1941 | ||
1942 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
1943 | if (se->se_callback_netid_len == 3 && | |
1944 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
1945 | expected_family = AF_INET; | |
1946 | else if (se->se_callback_netid_len == 4 && | |
1947 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
1948 | expected_family = AF_INET6; | |
1949 | else | |
1da177e4 LT |
1950 | goto out_err; |
1951 | ||
c212cecf | 1952 | conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val, |
aa9a4ec7 | 1953 | se->se_callback_addr_len, |
07263f1e BF |
1954 | (struct sockaddr *)&conn->cb_addr, |
1955 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 1956 | |
07263f1e | 1957 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 1958 | goto out_err; |
aa9a4ec7 | 1959 | |
07263f1e BF |
1960 | if (conn->cb_addr.ss_family == AF_INET6) |
1961 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 1962 | |
07263f1e BF |
1963 | conn->cb_prog = se->se_callback_prog; |
1964 | conn->cb_ident = se->se_callback_ident; | |
849a1cf1 | 1965 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
1da177e4 LT |
1966 | return; |
1967 | out_err: | |
07263f1e BF |
1968 | conn->cb_addr.ss_family = AF_UNSPEC; |
1969 | conn->cb_addrlen = 0; | |
849823c5 | 1970 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
1971 | "will not receive delegations\n", |
1972 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
1973 | ||
1da177e4 LT |
1974 | return; |
1975 | } | |
1976 | ||
074fe897 | 1977 | /* |
067e1ace | 1978 | * Cache a reply. nfsd4_check_resp_size() has bounded the cache size. |
074fe897 | 1979 | */ |
b607664e | 1980 | static void |
074fe897 | 1981 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) |
074fe897 | 1982 | { |
f5236013 | 1983 | struct xdr_buf *buf = resp->xdr.buf; |
557ce264 AA |
1984 | struct nfsd4_slot *slot = resp->cstate.slot; |
1985 | unsigned int base; | |
074fe897 | 1986 | |
557ce264 | 1987 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1988 | |
557ce264 AA |
1989 | slot->sl_opcnt = resp->opcnt; |
1990 | slot->sl_status = resp->cstate.status; | |
074fe897 | 1991 | |
bf5c43c8 | 1992 | slot->sl_flags |= NFSD4_SLOT_INITIALIZED; |
bf864a31 | 1993 | if (nfsd4_not_cached(resp)) { |
557ce264 | 1994 | slot->sl_datalen = 0; |
bf864a31 | 1995 | return; |
074fe897 | 1996 | } |
f5236013 BF |
1997 | base = resp->cstate.data_offset; |
1998 | slot->sl_datalen = buf->len - base; | |
1999 | if (read_bytes_from_xdr_buf(buf, base, slot->sl_data, slot->sl_datalen)) | |
557ce264 AA |
2000 | WARN("%s: sessions DRC could not cache compound\n", __func__); |
2001 | return; | |
074fe897 AA |
2002 | } |
2003 | ||
2004 | /* | |
abfabf8c AA |
2005 | * Encode the replay sequence operation from the slot values. |
2006 | * If cachethis is FALSE encode the uncached rep error on the next | |
2007 | * operation which sets resp->p and increments resp->opcnt for | |
2008 | * nfs4svc_encode_compoundres. | |
074fe897 | 2009 | * |
074fe897 | 2010 | */ |
abfabf8c AA |
2011 | static __be32 |
2012 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
2013 | struct nfsd4_compoundres *resp) | |
074fe897 | 2014 | { |
abfabf8c AA |
2015 | struct nfsd4_op *op; |
2016 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 2017 | |
abfabf8c AA |
2018 | /* Encode the replayed sequence operation */ |
2019 | op = &args->ops[resp->opcnt - 1]; | |
2020 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 2021 | |
abfabf8c | 2022 | /* Return nfserr_retry_uncached_rep in next operation. */ |
73e79482 | 2023 | if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) { |
abfabf8c AA |
2024 | op = &args->ops[resp->opcnt++]; |
2025 | op->status = nfserr_retry_uncached_rep; | |
2026 | nfsd4_encode_operation(resp, op); | |
074fe897 | 2027 | } |
abfabf8c | 2028 | return op->status; |
074fe897 AA |
2029 | } |
2030 | ||
2031 | /* | |
557ce264 AA |
2032 | * The sequence operation is not cached because we can use the slot and |
2033 | * session values. | |
074fe897 | 2034 | */ |
3ca2eb98 | 2035 | static __be32 |
bf864a31 AA |
2036 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
2037 | struct nfsd4_sequence *seq) | |
074fe897 | 2038 | { |
557ce264 | 2039 | struct nfsd4_slot *slot = resp->cstate.slot; |
f5236013 BF |
2040 | struct xdr_stream *xdr = &resp->xdr; |
2041 | __be32 *p; | |
074fe897 AA |
2042 | __be32 status; |
2043 | ||
557ce264 | 2044 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 2045 | |
abfabf8c | 2046 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); |
0da7b19c | 2047 | if (status) |
abfabf8c | 2048 | return status; |
074fe897 | 2049 | |
f5236013 BF |
2050 | p = xdr_reserve_space(xdr, slot->sl_datalen); |
2051 | if (!p) { | |
2052 | WARN_ON_ONCE(1); | |
2053 | return nfserr_serverfault; | |
2054 | } | |
2055 | xdr_encode_opaque_fixed(p, slot->sl_data, slot->sl_datalen); | |
2056 | xdr_commit_encode(xdr); | |
074fe897 | 2057 | |
557ce264 | 2058 | resp->opcnt = slot->sl_opcnt; |
f5236013 | 2059 | return slot->sl_status; |
074fe897 AA |
2060 | } |
2061 | ||
0733d213 AA |
2062 | /* |
2063 | * Set the exchange_id flags returned by the server. | |
2064 | */ | |
2065 | static void | |
2066 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
2067 | { | |
2068 | /* pNFS is not supported */ | |
2069 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
2070 | ||
2071 | /* Referrals are supported, Migration is not. */ | |
2072 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
2073 | ||
2074 | /* set the wire flags to return to client. */ | |
2075 | clid->flags = new->cl_exchange_flags; | |
2076 | } | |
2077 | ||
631fc9ea BF |
2078 | static bool client_has_state(struct nfs4_client *clp) |
2079 | { | |
2080 | /* | |
2081 | * Note clp->cl_openowners check isn't quite right: there's no | |
2082 | * need to count owners without stateid's. | |
2083 | * | |
2084 | * Also note we should probably be using this in 4.0 case too. | |
2085 | */ | |
6eccece9 BF |
2086 | return !list_empty(&clp->cl_openowners) |
2087 | || !list_empty(&clp->cl_delegations) | |
2088 | || !list_empty(&clp->cl_sessions); | |
631fc9ea BF |
2089 | } |
2090 | ||
069b6ad4 AA |
2091 | __be32 |
2092 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
2093 | struct nfsd4_compound_state *cstate, | |
2094 | struct nfsd4_exchange_id *exid) | |
2095 | { | |
0733d213 | 2096 | struct nfs4_client *unconf, *conf, *new; |
57b7b43b | 2097 | __be32 status; |
363168b4 | 2098 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 2099 | nfs4_verifier verf = exid->verifier; |
363168b4 | 2100 | struct sockaddr *sa = svc_addr(rqstp); |
83e08fd4 | 2101 | bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; |
c212cecf | 2102 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
0733d213 | 2103 | |
363168b4 | 2104 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 2105 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 2106 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 2107 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 2108 | addr_str, exid->flags, exid->spa_how); |
0733d213 | 2109 | |
a084daf5 | 2110 | if (exid->flags & ~EXCHGID4_FLAG_MASK_A) |
0733d213 AA |
2111 | return nfserr_inval; |
2112 | ||
0733d213 | 2113 | switch (exid->spa_how) { |
57266a6e BF |
2114 | case SP4_MACH_CRED: |
2115 | if (!svc_rqst_integrity_protected(rqstp)) | |
2116 | return nfserr_inval; | |
0733d213 AA |
2117 | case SP4_NONE: |
2118 | break; | |
063b0fb9 BF |
2119 | default: /* checked by xdr code */ |
2120 | WARN_ON_ONCE(1); | |
0733d213 | 2121 | case SP4_SSV: |
dd30333c | 2122 | return nfserr_encr_alg_unsupp; |
0733d213 AA |
2123 | } |
2124 | ||
2dbb269d | 2125 | /* Cases below refer to rfc 5661 section 18.35.4: */ |
0733d213 | 2126 | nfs4_lock_state(); |
382a62e7 | 2127 | conf = find_confirmed_client_by_name(&exid->clname, nn); |
0733d213 | 2128 | if (conf) { |
83e08fd4 BF |
2129 | bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); |
2130 | bool verfs_match = same_verf(&verf, &conf->cl_verifier); | |
2131 | ||
136e658d BF |
2132 | if (update) { |
2133 | if (!clp_used_exchangeid(conf)) { /* buggy client */ | |
2dbb269d | 2134 | status = nfserr_inval; |
1a308118 BF |
2135 | goto out; |
2136 | } | |
57266a6e BF |
2137 | if (!mach_creds_match(conf, rqstp)) { |
2138 | status = nfserr_wrong_cred; | |
2139 | goto out; | |
2140 | } | |
136e658d | 2141 | if (!creds_match) { /* case 9 */ |
ea236d07 | 2142 | status = nfserr_perm; |
136e658d BF |
2143 | goto out; |
2144 | } | |
2145 | if (!verfs_match) { /* case 8 */ | |
0733d213 AA |
2146 | status = nfserr_not_same; |
2147 | goto out; | |
2148 | } | |
136e658d BF |
2149 | /* case 6 */ |
2150 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
2151 | new = conf; | |
2152 | goto out_copy; | |
0733d213 | 2153 | } |
136e658d | 2154 | if (!creds_match) { /* case 3 */ |
631fc9ea BF |
2155 | if (client_has_state(conf)) { |
2156 | status = nfserr_clid_inuse; | |
0733d213 AA |
2157 | goto out; |
2158 | } | |
2159 | expire_client(conf); | |
2160 | goto out_new; | |
2161 | } | |
136e658d | 2162 | if (verfs_match) { /* case 2 */ |
0f1ba0ef | 2163 | conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; |
136e658d BF |
2164 | new = conf; |
2165 | goto out_copy; | |
2166 | } | |
2167 | /* case 5, client reboot */ | |
136e658d | 2168 | goto out_new; |
6ddbbbfe MS |
2169 | } |
2170 | ||
2dbb269d | 2171 | if (update) { /* case 7 */ |
6ddbbbfe MS |
2172 | status = nfserr_noent; |
2173 | goto out; | |
0733d213 AA |
2174 | } |
2175 | ||
a99454aa | 2176 | unconf = find_unconfirmed_client_by_name(&exid->clname, nn); |
2dbb269d | 2177 | if (unconf) /* case 4, possible retry or client restart */ |
0733d213 | 2178 | expire_client(unconf); |
0733d213 | 2179 | |
2dbb269d | 2180 | /* case 1 (normal case) */ |
0733d213 | 2181 | out_new: |
2216d449 | 2182 | new = create_client(exid->clname, rqstp, &verf); |
0733d213 | 2183 | if (new == NULL) { |
4731030d | 2184 | status = nfserr_jukebox; |
0733d213 AA |
2185 | goto out; |
2186 | } | |
4f540e29 | 2187 | new->cl_minorversion = cstate->minorversion; |
57266a6e | 2188 | new->cl_mach_cred = (exid->spa_how == SP4_MACH_CRED); |
0733d213 | 2189 | |
c212cecf | 2190 | gen_clid(new, nn); |
ac55fdc4 | 2191 | add_to_unconfirmed(new); |
0733d213 AA |
2192 | out_copy: |
2193 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
2194 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
2195 | ||
778df3f0 | 2196 | exid->seqid = new->cl_cs_slot.sl_seqid + 1; |
0733d213 AA |
2197 | nfsd4_set_ex_flags(new, exid); |
2198 | ||
2199 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
49557cc7 | 2200 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
2201 | status = nfs_ok; |
2202 | ||
2203 | out: | |
2204 | nfs4_unlock_state(); | |
0733d213 | 2205 | return status; |
069b6ad4 AA |
2206 | } |
2207 | ||
57b7b43b | 2208 | static __be32 |
88e588d5 | 2209 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 2210 | { |
88e588d5 AA |
2211 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
2212 | slot_seqid); | |
b85d4c01 BH |
2213 | |
2214 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
2215 | if (slot_inuse) { |
2216 | if (seqid == slot_seqid) | |
b85d4c01 BH |
2217 | return nfserr_jukebox; |
2218 | else | |
2219 | return nfserr_seq_misordered; | |
2220 | } | |
f6d82485 | 2221 | /* Note unsigned 32-bit arithmetic handles wraparound: */ |
88e588d5 | 2222 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 | 2223 | return nfs_ok; |
88e588d5 | 2224 | if (seqid == slot_seqid) |
b85d4c01 | 2225 | return nfserr_replay_cache; |
b85d4c01 BH |
2226 | return nfserr_seq_misordered; |
2227 | } | |
2228 | ||
49557cc7 AA |
2229 | /* |
2230 | * Cache the create session result into the create session single DRC | |
2231 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
2232 | * Do this for solo or embedded create session operations. | |
2233 | */ | |
2234 | static void | |
2235 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
57b7b43b | 2236 | struct nfsd4_clid_slot *slot, __be32 nfserr) |
49557cc7 AA |
2237 | { |
2238 | slot->sl_status = nfserr; | |
2239 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
2240 | } | |
2241 | ||
2242 | static __be32 | |
2243 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
2244 | struct nfsd4_clid_slot *slot) | |
2245 | { | |
2246 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
2247 | return slot->sl_status; | |
2248 | } | |
2249 | ||
1b74c25b MJ |
2250 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
2251 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
2252 | 1 + /* MIN tag is length with zero, only length */ \ | |
2253 | 3 + /* version, opcount, opcode */ \ | |
2254 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
2255 | /* seqid, slotID, slotID, cache */ \ | |
2256 | 4 ) * sizeof(__be32)) | |
2257 | ||
2258 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
2259 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
2260 | 1 + /* status */ \ | |
2261 | 1 + /* MIN tag is length with zero, only length */ \ | |
2262 | 3 + /* opcount, opcode, opstatus*/ \ | |
2263 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
2264 | /* seqid, slotID, slotID, slotID, status */ \ | |
2265 | 5 ) * sizeof(__be32)) | |
2266 | ||
55c760cf | 2267 | static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs *ca, struct nfsd_net *nn) |
1b74c25b | 2268 | { |
55c760cf BF |
2269 | u32 maxrpc = nn->nfsd_serv->sv_max_mesg; |
2270 | ||
373cd409 BF |
2271 | if (ca->maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ) |
2272 | return nfserr_toosmall; | |
2273 | if (ca->maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ) | |
2274 | return nfserr_toosmall; | |
55c760cf BF |
2275 | ca->headerpadsz = 0; |
2276 | ca->maxreq_sz = min_t(u32, ca->maxreq_sz, maxrpc); | |
2277 | ca->maxresp_sz = min_t(u32, ca->maxresp_sz, maxrpc); | |
2278 | ca->maxops = min_t(u32, ca->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
2279 | ca->maxresp_cached = min_t(u32, ca->maxresp_cached, | |
2280 | NFSD_SLOT_CACHE_SIZE + NFSD_MIN_HDR_SEQ_SZ); | |
2281 | ca->maxreqs = min_t(u32, ca->maxreqs, NFSD_MAX_SLOTS_PER_SESSION); | |
2282 | /* | |
2283 | * Note decreasing slot size below client's request may make it | |
2284 | * difficult for client to function correctly, whereas | |
2285 | * decreasing the number of slots will (just?) affect | |
2286 | * performance. When short on memory we therefore prefer to | |
2287 | * decrease number of slots instead of their size. Clients that | |
2288 | * request larger slots than they need will get poor results: | |
2289 | */ | |
2290 | ca->maxreqs = nfsd4_get_drc_mem(ca); | |
2291 | if (!ca->maxreqs) | |
2292 | return nfserr_jukebox; | |
2293 | ||
373cd409 | 2294 | return nfs_ok; |
1b74c25b MJ |
2295 | } |
2296 | ||
8a891633 KM |
2297 | #define NFSD_CB_MAX_REQ_SZ ((NFS4_enc_cb_recall_sz + \ |
2298 | RPC_MAX_HEADER_WITH_AUTH) * sizeof(__be32)) | |
2299 | #define NFSD_CB_MAX_RESP_SZ ((NFS4_dec_cb_recall_sz + \ | |
2300 | RPC_MAX_REPHEADER_WITH_AUTH) * sizeof(__be32)) | |
2301 | ||
06b332a5 | 2302 | static __be32 check_backchannel_attrs(struct nfsd4_channel_attrs *ca) |
1b74c25b | 2303 | { |
06b332a5 BF |
2304 | ca->headerpadsz = 0; |
2305 | ||
2306 | /* | |
2307 | * These RPC_MAX_HEADER macros are overkill, especially since we | |
2308 | * don't even do gss on the backchannel yet. But this is still | |
2309 | * less than 1k. Tighten up this estimate in the unlikely event | |
2310 | * it turns out to be a problem for some client: | |
2311 | */ | |
8a891633 | 2312 | if (ca->maxreq_sz < NFSD_CB_MAX_REQ_SZ) |
06b332a5 | 2313 | return nfserr_toosmall; |
8a891633 | 2314 | if (ca->maxresp_sz < NFSD_CB_MAX_RESP_SZ) |
06b332a5 BF |
2315 | return nfserr_toosmall; |
2316 | ca->maxresp_cached = 0; | |
2317 | if (ca->maxops < 2) | |
2318 | return nfserr_toosmall; | |
2319 | ||
2320 | return nfs_ok; | |
1b74c25b MJ |
2321 | } |
2322 | ||
b78724b7 BF |
2323 | static __be32 nfsd4_check_cb_sec(struct nfsd4_cb_sec *cbs) |
2324 | { | |
2325 | switch (cbs->flavor) { | |
2326 | case RPC_AUTH_NULL: | |
2327 | case RPC_AUTH_UNIX: | |
2328 | return nfs_ok; | |
2329 | default: | |
2330 | /* | |
2331 | * GSS case: the spec doesn't allow us to return this | |
2332 | * error. But it also doesn't allow us not to support | |
2333 | * GSS. | |
2334 | * I'd rather this fail hard than return some error the | |
2335 | * client might think it can already handle: | |
2336 | */ | |
2337 | return nfserr_encr_alg_unsupp; | |
2338 | } | |
2339 | } | |
2340 | ||
069b6ad4 AA |
2341 | __be32 |
2342 | nfsd4_create_session(struct svc_rqst *rqstp, | |
2343 | struct nfsd4_compound_state *cstate, | |
2344 | struct nfsd4_create_session *cr_ses) | |
2345 | { | |
363168b4 | 2346 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 2347 | struct nfs4_client *conf, *unconf; |
ac7c46f2 | 2348 | struct nfsd4_session *new; |
81f0b2a4 | 2349 | struct nfsd4_conn *conn; |
49557cc7 | 2350 | struct nfsd4_clid_slot *cs_slot = NULL; |
57b7b43b | 2351 | __be32 status = 0; |
8daae4dc | 2352 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
ec6b5d7b | 2353 | |
a62573dc MJ |
2354 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
2355 | return nfserr_inval; | |
b78724b7 BF |
2356 | status = nfsd4_check_cb_sec(&cr_ses->cb_sec); |
2357 | if (status) | |
2358 | return status; | |
55c760cf | 2359 | status = check_forechannel_attrs(&cr_ses->fore_channel, nn); |
06b332a5 BF |
2360 | if (status) |
2361 | return status; | |
2362 | status = check_backchannel_attrs(&cr_ses->back_channel); | |
373cd409 | 2363 | if (status) |
f403e450 | 2364 | goto out_release_drc_mem; |
81f0b2a4 | 2365 | status = nfserr_jukebox; |
60810e54 | 2366 | new = alloc_session(&cr_ses->fore_channel, &cr_ses->back_channel); |
55c760cf BF |
2367 | if (!new) |
2368 | goto out_release_drc_mem; | |
81f0b2a4 BF |
2369 | conn = alloc_conn_from_crses(rqstp, cr_ses); |
2370 | if (!conn) | |
2371 | goto out_free_session; | |
a62573dc | 2372 | |
ec6b5d7b | 2373 | nfs4_lock_state(); |
0a7ec377 | 2374 | unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn); |
8daae4dc | 2375 | conf = find_confirmed_client(&cr_ses->clientid, true, nn); |
78389046 | 2376 | WARN_ON_ONCE(conf && unconf); |
ec6b5d7b AA |
2377 | |
2378 | if (conf) { | |
57266a6e BF |
2379 | status = nfserr_wrong_cred; |
2380 | if (!mach_creds_match(conf, rqstp)) | |
2381 | goto out_free_conn; | |
49557cc7 AA |
2382 | cs_slot = &conf->cl_cs_slot; |
2383 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 2384 | if (status == nfserr_replay_cache) { |
49557cc7 | 2385 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
81f0b2a4 | 2386 | goto out_free_conn; |
49557cc7 | 2387 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b | 2388 | status = nfserr_seq_misordered; |
81f0b2a4 | 2389 | goto out_free_conn; |
ec6b5d7b | 2390 | } |
ec6b5d7b | 2391 | } else if (unconf) { |
8f9d3d3b | 2392 | struct nfs4_client *old; |
ec6b5d7b | 2393 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || |
363168b4 | 2394 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b | 2395 | status = nfserr_clid_inuse; |
81f0b2a4 | 2396 | goto out_free_conn; |
ec6b5d7b | 2397 | } |
57266a6e BF |
2398 | status = nfserr_wrong_cred; |
2399 | if (!mach_creds_match(unconf, rqstp)) | |
2400 | goto out_free_conn; | |
49557cc7 AA |
2401 | cs_slot = &unconf->cl_cs_slot; |
2402 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
2403 | if (status) { |
2404 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 2405 | status = nfserr_seq_misordered; |
81f0b2a4 | 2406 | goto out_free_conn; |
ec6b5d7b | 2407 | } |
382a62e7 | 2408 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
221a6876 BF |
2409 | if (old) { |
2410 | status = mark_client_expired(old); | |
2411 | if (status) | |
2412 | goto out_free_conn; | |
8f9d3d3b | 2413 | expire_client(old); |
221a6876 | 2414 | } |
8f9d3d3b | 2415 | move_to_confirmed(unconf); |
ec6b5d7b AA |
2416 | conf = unconf; |
2417 | } else { | |
2418 | status = nfserr_stale_clientid; | |
81f0b2a4 | 2419 | goto out_free_conn; |
ec6b5d7b | 2420 | } |
81f0b2a4 | 2421 | status = nfs_ok; |
408b79bc BF |
2422 | /* |
2423 | * We do not support RDMA or persistent sessions | |
2424 | */ | |
2425 | cr_ses->flags &= ~SESSION4_PERSIST; | |
2426 | cr_ses->flags &= ~SESSION4_RDMA; | |
2427 | ||
81f0b2a4 BF |
2428 | init_session(rqstp, new, conf, cr_ses); |
2429 | nfsd4_init_conn(rqstp, conn, new); | |
2430 | ||
ac7c46f2 | 2431 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, |
ec6b5d7b | 2432 | NFS4_MAX_SESSIONID_LEN); |
86c3e16c | 2433 | cs_slot->sl_seqid++; |
49557cc7 | 2434 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 2435 | |
49557cc7 AA |
2436 | /* cache solo and embedded create sessions under the state lock */ |
2437 | nfsd4_cache_create_session(cr_ses, cs_slot, status); | |
ec6b5d7b | 2438 | nfs4_unlock_state(); |
ec6b5d7b | 2439 | return status; |
81f0b2a4 | 2440 | out_free_conn: |
266533c6 | 2441 | nfs4_unlock_state(); |
81f0b2a4 BF |
2442 | free_conn(conn); |
2443 | out_free_session: | |
2444 | __free_session(new); | |
55c760cf BF |
2445 | out_release_drc_mem: |
2446 | nfsd4_put_drc_mem(&cr_ses->fore_channel); | |
1ca50792 | 2447 | return status; |
069b6ad4 AA |
2448 | } |
2449 | ||
1d1bc8f2 BF |
2450 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
2451 | { | |
2452 | switch (*dir) { | |
2453 | case NFS4_CDFC4_FORE: | |
2454 | case NFS4_CDFC4_BACK: | |
2455 | return nfs_ok; | |
2456 | case NFS4_CDFC4_FORE_OR_BOTH: | |
2457 | case NFS4_CDFC4_BACK_OR_BOTH: | |
2458 | *dir = NFS4_CDFC4_BOTH; | |
2459 | return nfs_ok; | |
2460 | }; | |
2461 | return nfserr_inval; | |
2462 | } | |
2463 | ||
cb73a9f4 BF |
2464 | __be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_backchannel_ctl *bc) |
2465 | { | |
2466 | struct nfsd4_session *session = cstate->session; | |
c9a49628 | 2467 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
b78724b7 | 2468 | __be32 status; |
cb73a9f4 | 2469 | |
b78724b7 BF |
2470 | status = nfsd4_check_cb_sec(&bc->bc_cb_sec); |
2471 | if (status) | |
2472 | return status; | |
c9a49628 | 2473 | spin_lock(&nn->client_lock); |
cb73a9f4 BF |
2474 | session->se_cb_prog = bc->bc_cb_program; |
2475 | session->se_cb_sec = bc->bc_cb_sec; | |
c9a49628 | 2476 | spin_unlock(&nn->client_lock); |
cb73a9f4 BF |
2477 | |
2478 | nfsd4_probe_callback(session->se_client); | |
2479 | ||
2480 | return nfs_ok; | |
2481 | } | |
2482 | ||
1d1bc8f2 BF |
2483 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, |
2484 | struct nfsd4_compound_state *cstate, | |
2485 | struct nfsd4_bind_conn_to_session *bcts) | |
2486 | { | |
2487 | __be32 status; | |
3ba63671 | 2488 | struct nfsd4_conn *conn; |
4f6e6c17 | 2489 | struct nfsd4_session *session; |
d4e19e70 TM |
2490 | struct net *net = SVC_NET(rqstp); |
2491 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1d1bc8f2 BF |
2492 | |
2493 | if (!nfsd4_last_compound_op(rqstp)) | |
2494 | return nfserr_not_only_op; | |
4f6e6c17 | 2495 | nfs4_lock_state(); |
c9a49628 | 2496 | spin_lock(&nn->client_lock); |
d4e19e70 | 2497 | session = find_in_sessionid_hashtbl(&bcts->sessionid, net, &status); |
c9a49628 | 2498 | spin_unlock(&nn->client_lock); |
4f6e6c17 | 2499 | if (!session) |
d4e19e70 | 2500 | goto out_no_session; |
57266a6e BF |
2501 | status = nfserr_wrong_cred; |
2502 | if (!mach_creds_match(session->se_client, rqstp)) | |
2503 | goto out; | |
1d1bc8f2 | 2504 | status = nfsd4_map_bcts_dir(&bcts->dir); |
3ba63671 | 2505 | if (status) |
4f6e6c17 | 2506 | goto out; |
3ba63671 | 2507 | conn = alloc_conn(rqstp, bcts->dir); |
4f6e6c17 | 2508 | status = nfserr_jukebox; |
3ba63671 | 2509 | if (!conn) |
4f6e6c17 BF |
2510 | goto out; |
2511 | nfsd4_init_conn(rqstp, conn, session); | |
2512 | status = nfs_ok; | |
2513 | out: | |
d4e19e70 TM |
2514 | nfsd4_put_session(session); |
2515 | out_no_session: | |
4f6e6c17 BF |
2516 | nfs4_unlock_state(); |
2517 | return status; | |
1d1bc8f2 BF |
2518 | } |
2519 | ||
5d4cec2f BF |
2520 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
2521 | { | |
2522 | if (!session) | |
2523 | return 0; | |
2524 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
2525 | } | |
2526 | ||
069b6ad4 AA |
2527 | __be32 |
2528 | nfsd4_destroy_session(struct svc_rqst *r, | |
2529 | struct nfsd4_compound_state *cstate, | |
2530 | struct nfsd4_destroy_session *sessionid) | |
2531 | { | |
e10e0cfc | 2532 | struct nfsd4_session *ses; |
abcdff09 | 2533 | __be32 status; |
f0f51f5c | 2534 | int ref_held_by_me = 0; |
d4e19e70 TM |
2535 | struct net *net = SVC_NET(r); |
2536 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
e10e0cfc | 2537 | |
abcdff09 BF |
2538 | nfs4_lock_state(); |
2539 | status = nfserr_not_only_op; | |
5d4cec2f | 2540 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 | 2541 | if (!nfsd4_last_compound_op(r)) |
abcdff09 | 2542 | goto out; |
f0f51f5c | 2543 | ref_held_by_me++; |
57716355 | 2544 | } |
e10e0cfc | 2545 | dump_sessionid(__func__, &sessionid->sessionid); |
c9a49628 | 2546 | spin_lock(&nn->client_lock); |
d4e19e70 | 2547 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid, net, &status); |
abcdff09 BF |
2548 | if (!ses) |
2549 | goto out_client_lock; | |
57266a6e BF |
2550 | status = nfserr_wrong_cred; |
2551 | if (!mach_creds_match(ses->se_client, r)) | |
d4e19e70 | 2552 | goto out_put_session; |
f0f51f5c | 2553 | status = mark_session_dead_locked(ses, 1 + ref_held_by_me); |
66b2b9b2 | 2554 | if (status) |
f0f51f5c | 2555 | goto out_put_session; |
e10e0cfc | 2556 | unhash_session(ses); |
c9a49628 | 2557 | spin_unlock(&nn->client_lock); |
e10e0cfc | 2558 | |
84f5f7cc | 2559 | nfsd4_probe_callback_sync(ses->se_client); |
19cf5c02 | 2560 | |
c9a49628 | 2561 | spin_lock(&nn->client_lock); |
e10e0cfc | 2562 | status = nfs_ok; |
f0f51f5c | 2563 | out_put_session: |
d4e19e70 | 2564 | nfsd4_put_session_locked(ses); |
abcdff09 BF |
2565 | out_client_lock: |
2566 | spin_unlock(&nn->client_lock); | |
e10e0cfc | 2567 | out: |
abcdff09 | 2568 | nfs4_unlock_state(); |
e10e0cfc | 2569 | return status; |
069b6ad4 AA |
2570 | } |
2571 | ||
a663bdd8 | 2572 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
2573 | { |
2574 | struct nfsd4_conn *c; | |
2575 | ||
2576 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 2577 | if (c->cn_xprt == xpt) { |
328ead28 BF |
2578 | return c; |
2579 | } | |
2580 | } | |
2581 | return NULL; | |
2582 | } | |
2583 | ||
57266a6e | 2584 | static __be32 nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
2585 | { |
2586 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 2587 | struct nfsd4_conn *c; |
57266a6e | 2588 | __be32 status = nfs_ok; |
21b75b01 | 2589 | int ret; |
328ead28 BF |
2590 | |
2591 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 2592 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
57266a6e BF |
2593 | if (c) |
2594 | goto out_free; | |
2595 | status = nfserr_conn_not_bound_to_session; | |
2596 | if (clp->cl_mach_cred) | |
2597 | goto out_free; | |
328ead28 BF |
2598 | __nfsd4_hash_conn(new, ses); |
2599 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
2600 | ret = nfsd4_register_conn(new); |
2601 | if (ret) | |
2602 | /* oops; xprt is already down: */ | |
2603 | nfsd4_conn_lost(&new->cn_xpt_user); | |
57266a6e BF |
2604 | return nfs_ok; |
2605 | out_free: | |
2606 | spin_unlock(&clp->cl_lock); | |
2607 | free_conn(new); | |
2608 | return status; | |
328ead28 BF |
2609 | } |
2610 | ||
868b89c3 MJ |
2611 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
2612 | { | |
2613 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
2614 | ||
2615 | return args->opcnt > session->se_fchannel.maxops; | |
2616 | } | |
2617 | ||
ae82a8d0 MJ |
2618 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
2619 | struct nfsd4_session *session) | |
2620 | { | |
2621 | struct xdr_buf *xb = &rqstp->rq_arg; | |
2622 | ||
2623 | return xb->len > session->se_fchannel.maxreq_sz; | |
2624 | } | |
2625 | ||
069b6ad4 | 2626 | __be32 |
b85d4c01 | 2627 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
2628 | struct nfsd4_compound_state *cstate, |
2629 | struct nfsd4_sequence *seq) | |
2630 | { | |
f9bb94c4 | 2631 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
47ee5298 | 2632 | struct xdr_stream *xdr = &resp->xdr; |
b85d4c01 | 2633 | struct nfsd4_session *session; |
221a6876 | 2634 | struct nfs4_client *clp; |
b85d4c01 | 2635 | struct nfsd4_slot *slot; |
a663bdd8 | 2636 | struct nfsd4_conn *conn; |
57b7b43b | 2637 | __be32 status; |
47ee5298 | 2638 | int buflen; |
d4e19e70 TM |
2639 | struct net *net = SVC_NET(rqstp); |
2640 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
b85d4c01 | 2641 | |
f9bb94c4 AA |
2642 | if (resp->opcnt != 1) |
2643 | return nfserr_sequence_pos; | |
2644 | ||
a663bdd8 BF |
2645 | /* |
2646 | * Will be either used or freed by nfsd4_sequence_check_conn | |
2647 | * below. | |
2648 | */ | |
2649 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
2650 | if (!conn) | |
2651 | return nfserr_jukebox; | |
2652 | ||
c9a49628 | 2653 | spin_lock(&nn->client_lock); |
d4e19e70 | 2654 | session = find_in_sessionid_hashtbl(&seq->sessionid, net, &status); |
b85d4c01 | 2655 | if (!session) |
221a6876 BF |
2656 | goto out_no_session; |
2657 | clp = session->se_client; | |
b85d4c01 | 2658 | |
868b89c3 MJ |
2659 | status = nfserr_too_many_ops; |
2660 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
66b2b9b2 | 2661 | goto out_put_session; |
868b89c3 | 2662 | |
ae82a8d0 MJ |
2663 | status = nfserr_req_too_big; |
2664 | if (nfsd4_request_too_big(rqstp, session)) | |
66b2b9b2 | 2665 | goto out_put_session; |
ae82a8d0 | 2666 | |
b85d4c01 | 2667 | status = nfserr_badslot; |
6c18ba9f | 2668 | if (seq->slotid >= session->se_fchannel.maxreqs) |
66b2b9b2 | 2669 | goto out_put_session; |
b85d4c01 | 2670 | |
557ce264 | 2671 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
2672 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
2673 | ||
a8dfdaeb AA |
2674 | /* We do not negotiate the number of slots yet, so set the |
2675 | * maxslots to the session maxreqs which is used to encode | |
2676 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
2677 | seq->maxslots = session->se_fchannel.maxreqs; | |
2678 | ||
73e79482 BF |
2679 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, |
2680 | slot->sl_flags & NFSD4_SLOT_INUSE); | |
b85d4c01 | 2681 | if (status == nfserr_replay_cache) { |
bf5c43c8 BF |
2682 | status = nfserr_seq_misordered; |
2683 | if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) | |
66b2b9b2 | 2684 | goto out_put_session; |
b85d4c01 BH |
2685 | cstate->slot = slot; |
2686 | cstate->session = session; | |
4b24ca7d | 2687 | cstate->clp = clp; |
da3846a2 | 2688 | /* Return the cached reply status and set cstate->status |
557ce264 | 2689 | * for nfsd4_proc_compound processing */ |
bf864a31 | 2690 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 2691 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 2692 | goto out; |
b85d4c01 BH |
2693 | } |
2694 | if (status) | |
66b2b9b2 | 2695 | goto out_put_session; |
b85d4c01 | 2696 | |
57266a6e | 2697 | status = nfsd4_sequence_check_conn(conn, session); |
a663bdd8 | 2698 | conn = NULL; |
57266a6e BF |
2699 | if (status) |
2700 | goto out_put_session; | |
328ead28 | 2701 | |
47ee5298 BF |
2702 | buflen = (seq->cachethis) ? |
2703 | session->se_fchannel.maxresp_cached : | |
2704 | session->se_fchannel.maxresp_sz; | |
2705 | status = (seq->cachethis) ? nfserr_rep_too_big_to_cache : | |
2706 | nfserr_rep_too_big; | |
a5cddc88 | 2707 | if (xdr_restrict_buflen(xdr, buflen - rqstp->rq_auth_slack)) |
47ee5298 | 2708 | goto out_put_session; |
32aaa62e | 2709 | svc_reserve(rqstp, buflen); |
47ee5298 BF |
2710 | |
2711 | status = nfs_ok; | |
b85d4c01 | 2712 | /* Success! bump slot seqid */ |
b85d4c01 | 2713 | slot->sl_seqid = seq->seqid; |
bf5c43c8 | 2714 | slot->sl_flags |= NFSD4_SLOT_INUSE; |
73e79482 BF |
2715 | if (seq->cachethis) |
2716 | slot->sl_flags |= NFSD4_SLOT_CACHETHIS; | |
bf5c43c8 BF |
2717 | else |
2718 | slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; | |
b85d4c01 BH |
2719 | |
2720 | cstate->slot = slot; | |
2721 | cstate->session = session; | |
4b24ca7d | 2722 | cstate->clp = clp; |
b85d4c01 | 2723 | |
b85d4c01 | 2724 | out: |
221a6876 BF |
2725 | switch (clp->cl_cb_state) { |
2726 | case NFSD4_CB_DOWN: | |
2727 | seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; | |
2728 | break; | |
2729 | case NFSD4_CB_FAULT: | |
2730 | seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; | |
2731 | break; | |
2732 | default: | |
2733 | seq->status_flags = 0; | |
aaf84eb9 | 2734 | } |
3bd64a5b BF |
2735 | if (!list_empty(&clp->cl_revoked)) |
2736 | seq->status_flags |= SEQ4_STATUS_RECALLABLE_STATE_REVOKED; | |
221a6876 | 2737 | out_no_session: |
3f42d2c4 KM |
2738 | if (conn) |
2739 | free_conn(conn); | |
c9a49628 | 2740 | spin_unlock(&nn->client_lock); |
b85d4c01 | 2741 | return status; |
66b2b9b2 | 2742 | out_put_session: |
d4e19e70 | 2743 | nfsd4_put_session_locked(session); |
221a6876 | 2744 | goto out_no_session; |
069b6ad4 AA |
2745 | } |
2746 | ||
b607664e TM |
2747 | void |
2748 | nfsd4_sequence_done(struct nfsd4_compoundres *resp) | |
2749 | { | |
2750 | struct nfsd4_compound_state *cs = &resp->cstate; | |
2751 | ||
2752 | if (nfsd4_has_session(cs)) { | |
b607664e TM |
2753 | if (cs->status != nfserr_replay_cache) { |
2754 | nfsd4_store_cache_entry(resp); | |
2755 | cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE; | |
2756 | } | |
d4e19e70 | 2757 | /* Drop session reference that was taken in nfsd4_sequence() */ |
b607664e | 2758 | nfsd4_put_session(cs->session); |
4b24ca7d JL |
2759 | } else if (cs->clp) |
2760 | put_client_renew(cs->clp); | |
b607664e TM |
2761 | } |
2762 | ||
345c2842 MJ |
2763 | __be32 |
2764 | nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) | |
2765 | { | |
2766 | struct nfs4_client *conf, *unconf, *clp; | |
57b7b43b | 2767 | __be32 status = 0; |
8daae4dc | 2768 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
345c2842 MJ |
2769 | |
2770 | nfs4_lock_state(); | |
0a7ec377 | 2771 | unconf = find_unconfirmed_client(&dc->clientid, true, nn); |
8daae4dc | 2772 | conf = find_confirmed_client(&dc->clientid, true, nn); |
78389046 | 2773 | WARN_ON_ONCE(conf && unconf); |
345c2842 MJ |
2774 | |
2775 | if (conf) { | |
2776 | clp = conf; | |
2777 | ||
c0293b01 | 2778 | if (client_has_state(conf)) { |
345c2842 MJ |
2779 | status = nfserr_clientid_busy; |
2780 | goto out; | |
2781 | } | |
2782 | } else if (unconf) | |
2783 | clp = unconf; | |
2784 | else { | |
2785 | status = nfserr_stale_clientid; | |
2786 | goto out; | |
2787 | } | |
57266a6e BF |
2788 | if (!mach_creds_match(clp, rqstp)) { |
2789 | status = nfserr_wrong_cred; | |
2790 | goto out; | |
2791 | } | |
345c2842 MJ |
2792 | expire_client(clp); |
2793 | out: | |
2794 | nfs4_unlock_state(); | |
345c2842 MJ |
2795 | return status; |
2796 | } | |
2797 | ||
4dc6ec00 BF |
2798 | __be32 |
2799 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
2800 | { | |
57b7b43b | 2801 | __be32 status = 0; |
bcecf1cc | 2802 | |
4dc6ec00 BF |
2803 | if (rc->rca_one_fs) { |
2804 | if (!cstate->current_fh.fh_dentry) | |
2805 | return nfserr_nofilehandle; | |
2806 | /* | |
2807 | * We don't take advantage of the rca_one_fs case. | |
2808 | * That's OK, it's optional, we can safely ignore it. | |
2809 | */ | |
2810 | return nfs_ok; | |
2811 | } | |
bcecf1cc | 2812 | |
4dc6ec00 | 2813 | nfs4_lock_state(); |
bcecf1cc | 2814 | status = nfserr_complete_already; |
a52d726b JL |
2815 | if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, |
2816 | &cstate->session->se_client->cl_flags)) | |
bcecf1cc MJ |
2817 | goto out; |
2818 | ||
2819 | status = nfserr_stale_clientid; | |
2820 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
2821 | /* |
2822 | * The following error isn't really legal. | |
2823 | * But we only get here if the client just explicitly | |
2824 | * destroyed the client. Surely it no longer cares what | |
2825 | * error it gets back on an operation for the dead | |
2826 | * client. | |
2827 | */ | |
bcecf1cc MJ |
2828 | goto out; |
2829 | ||
2830 | status = nfs_ok; | |
2a4317c5 | 2831 | nfsd4_client_record_create(cstate->session->se_client); |
bcecf1cc | 2832 | out: |
4dc6ec00 | 2833 | nfs4_unlock_state(); |
bcecf1cc | 2834 | return status; |
4dc6ec00 BF |
2835 | } |
2836 | ||
b37ad28b | 2837 | __be32 |
b591480b BF |
2838 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2839 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 2840 | { |
a084daf5 | 2841 | struct xdr_netobj clname = setclid->se_name; |
1da177e4 | 2842 | nfs4_verifier clverifier = setclid->se_verf; |
28ce6054 | 2843 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 2844 | __be32 status; |
c212cecf SK |
2845 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
2846 | ||
63db4632 | 2847 | /* Cases below refer to rfc 3530 section 14.2.33: */ |
1da177e4 | 2848 | nfs4_lock_state(); |
382a62e7 | 2849 | conf = find_confirmed_client_by_name(&clname, nn); |
28ce6054 | 2850 | if (conf) { |
63db4632 | 2851 | /* case 0: */ |
1da177e4 | 2852 | status = nfserr_clid_inuse; |
e203d506 BF |
2853 | if (clp_used_exchangeid(conf)) |
2854 | goto out; | |
026722c2 | 2855 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
2856 | char addr_str[INET6_ADDRSTRLEN]; |
2857 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
2858 | sizeof(addr_str)); | |
2859 | dprintk("NFSD: setclientid: string in use by client " | |
2860 | "at %s\n", addr_str); | |
1da177e4 LT |
2861 | goto out; |
2862 | } | |
1da177e4 | 2863 | } |
a99454aa | 2864 | unconf = find_unconfirmed_client_by_name(&clname, nn); |
8f930711 BF |
2865 | if (unconf) |
2866 | expire_client(unconf); | |
3e772463 | 2867 | status = nfserr_jukebox; |
2216d449 | 2868 | new = create_client(clname, rqstp, &clverifier); |
8f930711 BF |
2869 | if (new == NULL) |
2870 | goto out; | |
34b232bb | 2871 | if (conf && same_verf(&conf->cl_verifier, &clverifier)) |
63db4632 | 2872 | /* case 1: probable callback update */ |
1da177e4 | 2873 | copy_clid(new, conf); |
34b232bb | 2874 | else /* case 4 (new client) or cases 2, 3 (client reboot): */ |
c212cecf | 2875 | gen_clid(new, nn); |
8323c3b2 | 2876 | new->cl_minorversion = 0; |
6f3d772f | 2877 | gen_callback(new, setclid, rqstp); |
ac55fdc4 | 2878 | add_to_unconfirmed(new); |
1da177e4 LT |
2879 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
2880 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
2881 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
2882 | status = nfs_ok; | |
2883 | out: | |
2884 | nfs4_unlock_state(); | |
2885 | return status; | |
2886 | } | |
2887 | ||
2888 | ||
b37ad28b | 2889 | __be32 |
b591480b BF |
2890 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
2891 | struct nfsd4_compound_state *cstate, | |
2892 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 2893 | { |
21ab45a4 | 2894 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
2895 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
2896 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 2897 | __be32 status; |
7f2210fa | 2898 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 2899 | |
2c142baa | 2900 | if (STALE_CLIENTID(clid, nn)) |
1da177e4 | 2901 | return nfserr_stale_clientid; |
1da177e4 | 2902 | nfs4_lock_state(); |
21ab45a4 | 2903 | |
8daae4dc | 2904 | conf = find_confirmed_client(clid, false, nn); |
0a7ec377 | 2905 | unconf = find_unconfirmed_client(clid, false, nn); |
a186e767 | 2906 | /* |
8695b90a BF |
2907 | * We try hard to give out unique clientid's, so if we get an |
2908 | * attempt to confirm the same clientid with a different cred, | |
2909 | * there's a bug somewhere. Let's charitably assume it's our | |
2910 | * bug. | |
a186e767 | 2911 | */ |
8695b90a BF |
2912 | status = nfserr_serverfault; |
2913 | if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) | |
2914 | goto out; | |
2915 | if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) | |
2916 | goto out; | |
63db4632 | 2917 | /* cases below refer to rfc 3530 section 14.2.34: */ |
90d700b7 BF |
2918 | if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) { |
2919 | if (conf && !unconf) /* case 2: probable retransmit */ | |
1da177e4 | 2920 | status = nfs_ok; |
90d700b7 BF |
2921 | else /* case 4: client hasn't noticed we rebooted yet? */ |
2922 | status = nfserr_stale_clientid; | |
2923 | goto out; | |
2924 | } | |
2925 | status = nfs_ok; | |
2926 | if (conf) { /* case 1: callback update */ | |
8695b90a BF |
2927 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
2928 | nfsd4_probe_callback(conf); | |
2929 | expire_client(unconf); | |
90d700b7 | 2930 | } else { /* case 3: normal case; new or rebooted client */ |
382a62e7 | 2931 | conf = find_confirmed_client_by_name(&unconf->cl_name, nn); |
221a6876 BF |
2932 | if (conf) { |
2933 | status = mark_client_expired(conf); | |
2934 | if (status) | |
2935 | goto out; | |
8695b90a | 2936 | expire_client(conf); |
221a6876 | 2937 | } |
8695b90a | 2938 | move_to_confirmed(unconf); |
f3d03b92 | 2939 | nfsd4_probe_callback(unconf); |
08e8987c | 2940 | } |
1da177e4 | 2941 | out: |
1da177e4 LT |
2942 | nfs4_unlock_state(); |
2943 | return status; | |
2944 | } | |
2945 | ||
32513b40 BF |
2946 | static struct nfs4_file *nfsd4_alloc_file(void) |
2947 | { | |
2948 | return kmem_cache_alloc(file_slab, GFP_KERNEL); | |
2949 | } | |
2950 | ||
1da177e4 | 2951 | /* OPEN Share state helper functions */ |
f9c00c3a | 2952 | static void nfsd4_init_file(struct nfs4_file *fp, struct knfsd_fh *fh) |
1da177e4 | 2953 | { |
ca943217 | 2954 | unsigned int hashval = file_hashval(fh); |
1da177e4 | 2955 | |
950e0118 TM |
2956 | lockdep_assert_held(&state_lock); |
2957 | ||
32513b40 | 2958 | atomic_set(&fp->fi_ref, 1); |
1d31a253 | 2959 | spin_lock_init(&fp->fi_lock); |
32513b40 BF |
2960 | INIT_LIST_HEAD(&fp->fi_stateids); |
2961 | INIT_LIST_HEAD(&fp->fi_delegations); | |
e2cf80d7 | 2962 | fh_copy_shallow(&fp->fi_fhandle, fh); |
32513b40 BF |
2963 | fp->fi_had_conflict = false; |
2964 | fp->fi_lease = NULL; | |
baeb4ff0 | 2965 | fp->fi_share_deny = 0; |
32513b40 BF |
2966 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); |
2967 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
89876f8c | 2968 | hlist_add_head(&fp->fi_hash, &file_hashtbl[hashval]); |
1da177e4 LT |
2969 | } |
2970 | ||
e8ff2a84 | 2971 | void |
1da177e4 LT |
2972 | nfsd4_free_slabs(void) |
2973 | { | |
abf1135b CH |
2974 | kmem_cache_destroy(openowner_slab); |
2975 | kmem_cache_destroy(lockowner_slab); | |
2976 | kmem_cache_destroy(file_slab); | |
2977 | kmem_cache_destroy(stateid_slab); | |
2978 | kmem_cache_destroy(deleg_slab); | |
e60d4398 | 2979 | } |
1da177e4 | 2980 | |
72083396 | 2981 | int |
e60d4398 N |
2982 | nfsd4_init_slabs(void) |
2983 | { | |
fe0750e5 BF |
2984 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
2985 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2986 | if (openowner_slab == NULL) | |
abf1135b | 2987 | goto out; |
fe0750e5 | 2988 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", |
3c40794b | 2989 | sizeof(struct nfs4_lockowner), 0, 0, NULL); |
fe0750e5 | 2990 | if (lockowner_slab == NULL) |
abf1135b | 2991 | goto out_free_openowner_slab; |
e60d4398 | 2992 | file_slab = kmem_cache_create("nfsd4_files", |
20c2df83 | 2993 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 | 2994 | if (file_slab == NULL) |
abf1135b | 2995 | goto out_free_lockowner_slab; |
5ac049ac | 2996 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
dcef0413 | 2997 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
5ac049ac | 2998 | if (stateid_slab == NULL) |
abf1135b | 2999 | goto out_free_file_slab; |
5b2d21c1 | 3000 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 3001 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 | 3002 | if (deleg_slab == NULL) |
abf1135b | 3003 | goto out_free_stateid_slab; |
e60d4398 | 3004 | return 0; |
abf1135b CH |
3005 | |
3006 | out_free_stateid_slab: | |
3007 | kmem_cache_destroy(stateid_slab); | |
3008 | out_free_file_slab: | |
3009 | kmem_cache_destroy(file_slab); | |
3010 | out_free_lockowner_slab: | |
3011 | kmem_cache_destroy(lockowner_slab); | |
3012 | out_free_openowner_slab: | |
3013 | kmem_cache_destroy(openowner_slab); | |
3014 | out: | |
e60d4398 N |
3015 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); |
3016 | return -ENOMEM; | |
1da177e4 LT |
3017 | } |
3018 | ||
ff194bd9 | 3019 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 3020 | { |
ff194bd9 BF |
3021 | rp->rp_status = nfserr_serverfault; |
3022 | rp->rp_buflen = 0; | |
3023 | rp->rp_buf = rp->rp_ibuf; | |
58fb12e6 JL |
3024 | mutex_init(&rp->rp_mutex); |
3025 | } | |
3026 | ||
3027 | static void nfsd4_cstate_assign_replay(struct nfsd4_compound_state *cstate, | |
3028 | struct nfs4_stateowner *so) | |
3029 | { | |
3030 | if (!nfsd4_has_session(cstate)) { | |
3031 | mutex_lock(&so->so_replay.rp_mutex); | |
3032 | cstate->replay_owner = so; | |
3033 | atomic_inc(&so->so_count); | |
3034 | } | |
3035 | } | |
3036 | ||
3037 | void nfsd4_cstate_clear_replay(struct nfsd4_compound_state *cstate) | |
3038 | { | |
3039 | struct nfs4_stateowner *so = cstate->replay_owner; | |
3040 | ||
3041 | if (so != NULL) { | |
3042 | cstate->replay_owner = NULL; | |
3043 | mutex_unlock(&so->so_replay.rp_mutex); | |
3044 | nfs4_put_stateowner(so); | |
3045 | } | |
1da177e4 LT |
3046 | } |
3047 | ||
fe0750e5 | 3048 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 3049 | { |
1da177e4 | 3050 | struct nfs4_stateowner *sop; |
1da177e4 | 3051 | |
fe0750e5 | 3052 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
3053 | if (!sop) |
3054 | return NULL; | |
3055 | ||
3056 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); | |
3057 | if (!sop->so_owner.data) { | |
fe0750e5 | 3058 | kmem_cache_free(slab, sop); |
1da177e4 | 3059 | return NULL; |
ff194bd9 BF |
3060 | } |
3061 | sop->so_owner.len = owner->len; | |
3062 | ||
ea1da636 | 3063 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 BF |
3064 | sop->so_client = clp; |
3065 | init_nfs4_replay(&sop->so_replay); | |
6b180f0b | 3066 | atomic_set(&sop->so_count, 1); |
ff194bd9 BF |
3067 | return sop; |
3068 | } | |
3069 | ||
fe0750e5 | 3070 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 | 3071 | { |
d4f0489f | 3072 | lockdep_assert_held(&clp->cl_lock); |
9b531137 | 3073 | |
d4f0489f TM |
3074 | list_add(&oo->oo_owner.so_strhash, |
3075 | &clp->cl_ownerstr_hashtbl[strhashval]); | |
fe0750e5 | 3076 | list_add(&oo->oo_perclient, &clp->cl_openowners); |
ff194bd9 BF |
3077 | } |
3078 | ||
8f4b54c5 JL |
3079 | static void nfs4_unhash_openowner(struct nfs4_stateowner *so) |
3080 | { | |
d4f0489f | 3081 | struct nfs4_client *clp = so->so_client; |
8f4b54c5 | 3082 | |
d4f0489f TM |
3083 | spin_lock(&clp->cl_lock); |
3084 | unhash_openowner_locked(openowner(so)); | |
3085 | spin_unlock(&clp->cl_lock); | |
8f4b54c5 JL |
3086 | } |
3087 | ||
6b180f0b JL |
3088 | static void nfs4_free_openowner(struct nfs4_stateowner *so) |
3089 | { | |
3090 | struct nfs4_openowner *oo = openowner(so); | |
3091 | ||
3092 | kmem_cache_free(openowner_slab, oo); | |
3093 | } | |
3094 | ||
3095 | static const struct nfs4_stateowner_operations openowner_ops = { | |
8f4b54c5 JL |
3096 | .so_unhash = nfs4_unhash_openowner, |
3097 | .so_free = nfs4_free_openowner, | |
6b180f0b JL |
3098 | }; |
3099 | ||
fe0750e5 | 3100 | static struct nfs4_openowner * |
13d6f66b | 3101 | alloc_init_open_stateowner(unsigned int strhashval, struct nfsd4_open *open, |
db24b3b4 JL |
3102 | struct nfsd4_compound_state *cstate) |
3103 | { | |
13d6f66b | 3104 | struct nfs4_client *clp = cstate->clp; |
7ffb5880 | 3105 | struct nfs4_openowner *oo, *ret; |
ff194bd9 | 3106 | |
fe0750e5 BF |
3107 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
3108 | if (!oo) | |
ff194bd9 | 3109 | return NULL; |
6b180f0b | 3110 | oo->oo_owner.so_ops = &openowner_ops; |
fe0750e5 BF |
3111 | oo->oo_owner.so_is_open_owner = 1; |
3112 | oo->oo_owner.so_seqid = open->op_seqid; | |
d3134b10 | 3113 | oo->oo_flags = 0; |
db24b3b4 JL |
3114 | if (nfsd4_has_session(cstate)) |
3115 | oo->oo_flags |= NFS4_OO_CONFIRMED; | |
fe0750e5 | 3116 | oo->oo_time = 0; |
38c387b5 | 3117 | oo->oo_last_closed_stid = NULL; |
fe0750e5 | 3118 | INIT_LIST_HEAD(&oo->oo_close_lru); |
d4f0489f TM |
3119 | spin_lock(&clp->cl_lock); |
3120 | ret = find_openstateowner_str_locked(strhashval, open, clp); | |
7ffb5880 TM |
3121 | if (ret == NULL) { |
3122 | hash_openowner(oo, clp, strhashval); | |
3123 | ret = oo; | |
3124 | } else | |
3125 | nfs4_free_openowner(&oo->oo_owner); | |
d4f0489f | 3126 | spin_unlock(&clp->cl_lock); |
fe0750e5 | 3127 | return oo; |
1da177e4 LT |
3128 | } |
3129 | ||
996e0938 | 3130 | static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { |
fe0750e5 | 3131 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 3132 | |
d6f2bc5d | 3133 | atomic_inc(&stp->st_stid.sc_count); |
3abdb607 | 3134 | stp->st_stid.sc_type = NFS4_OPEN_STID; |
3c87b9b7 | 3135 | INIT_LIST_HEAD(&stp->st_locks); |
fe0750e5 | 3136 | stp->st_stateowner = &oo->oo_owner; |
d3134b10 | 3137 | atomic_inc(&stp->st_stateowner->so_count); |
13cd2184 | 3138 | get_nfs4_file(fp); |
11b9164a | 3139 | stp->st_stid.sc_file = fp; |
1da177e4 LT |
3140 | stp->st_access_bmap = 0; |
3141 | stp->st_deny_bmap = 0; | |
4c4cd222 | 3142 | stp->st_openstp = NULL; |
1c755dc1 JL |
3143 | spin_lock(&oo->oo_owner.so_client->cl_lock); |
3144 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); | |
1d31a253 TM |
3145 | spin_lock(&fp->fi_lock); |
3146 | list_add(&stp->st_perfile, &fp->fi_stateids); | |
3147 | spin_unlock(&fp->fi_lock); | |
1c755dc1 | 3148 | spin_unlock(&oo->oo_owner.so_client->cl_lock); |
1da177e4 LT |
3149 | } |
3150 | ||
d3134b10 JL |
3151 | /* |
3152 | * In the 4.0 case we need to keep the owners around a little while to handle | |
3153 | * CLOSE replay. We still do need to release any file access that is held by | |
3154 | * them before returning however. | |
3155 | */ | |
fd39ca9a | 3156 | static void |
d3134b10 | 3157 | move_to_close_lru(struct nfs4_ol_stateid *s, struct net *net) |
1da177e4 | 3158 | { |
d3134b10 JL |
3159 | struct nfs4_openowner *oo = openowner(s->st_stateowner); |
3160 | struct nfsd_net *nn = net_generic(s->st_stid.sc_client->net, | |
3161 | nfsd_net_id); | |
73758fed | 3162 | |
fe0750e5 | 3163 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 3164 | |
b401be22 JL |
3165 | /* |
3166 | * We know that we hold one reference via nfsd4_close, and another | |
3167 | * "persistent" reference for the client. If the refcount is higher | |
3168 | * than 2, then there are still calls in progress that are using this | |
3169 | * stateid. We can't put the sc_file reference until they are finished. | |
3170 | * Wait for the refcount to drop to 2. Since it has been unhashed, | |
3171 | * there should be no danger of the refcount going back up again at | |
3172 | * this point. | |
3173 | */ | |
3174 | wait_event(close_wq, atomic_read(&s->st_stid.sc_count) == 2); | |
3175 | ||
d3134b10 JL |
3176 | release_all_access(s); |
3177 | if (s->st_stid.sc_file) { | |
3178 | put_nfs4_file(s->st_stid.sc_file); | |
3179 | s->st_stid.sc_file = NULL; | |
3180 | } | |
3181 | release_last_closed_stateid(oo); | |
3182 | oo->oo_last_closed_stid = s; | |
73758fed | 3183 | list_move_tail(&oo->oo_close_lru, &nn->close_lru); |
fe0750e5 | 3184 | oo->oo_time = get_seconds(); |
1da177e4 LT |
3185 | } |
3186 | ||
1da177e4 LT |
3187 | /* search file_hashtbl[] for file */ |
3188 | static struct nfs4_file * | |
ca943217 | 3189 | find_file_locked(struct knfsd_fh *fh) |
1da177e4 | 3190 | { |
ca943217 | 3191 | unsigned int hashval = file_hashval(fh); |
1da177e4 LT |
3192 | struct nfs4_file *fp; |
3193 | ||
950e0118 TM |
3194 | lockdep_assert_held(&state_lock); |
3195 | ||
89876f8c | 3196 | hlist_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
ca943217 | 3197 | if (nfsd_fh_match(&fp->fi_fhandle, fh)) { |
13cd2184 | 3198 | get_nfs4_file(fp); |
1da177e4 | 3199 | return fp; |
13cd2184 | 3200 | } |
1da177e4 LT |
3201 | } |
3202 | return NULL; | |
3203 | } | |
3204 | ||
950e0118 | 3205 | static struct nfs4_file * |
ca943217 | 3206 | find_file(struct knfsd_fh *fh) |
950e0118 TM |
3207 | { |
3208 | struct nfs4_file *fp; | |
3209 | ||
3210 | spin_lock(&state_lock); | |
ca943217 | 3211 | fp = find_file_locked(fh); |
950e0118 TM |
3212 | spin_unlock(&state_lock); |
3213 | return fp; | |
3214 | } | |
3215 | ||
3216 | static struct nfs4_file * | |
f9c00c3a | 3217 | find_or_add_file(struct nfs4_file *new, struct knfsd_fh *fh) |
950e0118 TM |
3218 | { |
3219 | struct nfs4_file *fp; | |
3220 | ||
3221 | spin_lock(&state_lock); | |
ca943217 | 3222 | fp = find_file_locked(fh); |
950e0118 | 3223 | if (fp == NULL) { |
f9c00c3a | 3224 | nfsd4_init_file(new, fh); |
950e0118 TM |
3225 | fp = new; |
3226 | } | |
3227 | spin_unlock(&state_lock); | |
3228 | ||
3229 | return fp; | |
3230 | } | |
3231 | ||
1da177e4 LT |
3232 | /* |
3233 | * Called to check deny when READ with all zero stateid or | |
3234 | * WRITE with all zero or all one stateid | |
3235 | */ | |
b37ad28b | 3236 | static __be32 |
1da177e4 LT |
3237 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
3238 | { | |
1da177e4 | 3239 | struct nfs4_file *fp; |
baeb4ff0 | 3240 | __be32 ret = nfs_ok; |
1da177e4 | 3241 | |
ca943217 | 3242 | fp = find_file(¤t_fh->fh_handle); |
13cd2184 | 3243 | if (!fp) |
baeb4ff0 JL |
3244 | return ret; |
3245 | /* Check for conflicting share reservations */ | |
1d31a253 | 3246 | spin_lock(&fp->fi_lock); |
baeb4ff0 JL |
3247 | if (fp->fi_share_deny & deny_type) |
3248 | ret = nfserr_locked; | |
1d31a253 | 3249 | spin_unlock(&fp->fi_lock); |
13cd2184 N |
3250 | put_nfs4_file(fp); |
3251 | return ret; | |
1da177e4 LT |
3252 | } |
3253 | ||
02e1215f | 3254 | void nfsd4_prepare_cb_recall(struct nfs4_delegation *dp) |
1da177e4 | 3255 | { |
11b9164a TM |
3256 | struct nfsd_net *nn = net_generic(dp->dl_stid.sc_client->net, |
3257 | nfsd_net_id); | |
e8c69d17 | 3258 | |
11b9164a | 3259 | block_delegations(&dp->dl_stid.sc_file->fi_fhandle); |
f54fe962 | 3260 | |
dff1399f | 3261 | /* |
f54fe962 JL |
3262 | * We can't do this in nfsd_break_deleg_cb because it is |
3263 | * already holding inode->i_lock. | |
3264 | * | |
dff1399f JL |
3265 | * If the dl_time != 0, then we know that it has already been |
3266 | * queued for a lease break. Don't queue it again. | |
3267 | */ | |
f54fe962 | 3268 | spin_lock(&state_lock); |
dff1399f | 3269 | if (dp->dl_time == 0) { |
dff1399f | 3270 | dp->dl_time = get_seconds(); |
02e1215f | 3271 | list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru); |
dff1399f | 3272 | } |
02e1215f JL |
3273 | spin_unlock(&state_lock); |
3274 | } | |
1da177e4 | 3275 | |
02e1215f JL |
3276 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
3277 | { | |
3278 | /* | |
3279 | * We're assuming the state code never drops its reference | |
3280 | * without first removing the lease. Since we're in this lease | |
3281 | * callback (and since the lease code is serialized by the kernel | |
3282 | * lock) we know the server hasn't removed the lease yet, we know | |
3283 | * it's safe to take a reference. | |
3284 | */ | |
72c0b0fb | 3285 | atomic_inc(&dp->dl_stid.sc_count); |
6b57d9c8 BF |
3286 | nfsd4_cb_recall(dp); |
3287 | } | |
3288 | ||
1c8c601a | 3289 | /* Called from break_lease() with i_lock held. */ |
6b57d9c8 BF |
3290 | static void nfsd_break_deleg_cb(struct file_lock *fl) |
3291 | { | |
acfdf5c3 BF |
3292 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
3293 | struct nfs4_delegation *dp; | |
6b57d9c8 | 3294 | |
7fa10cd1 BF |
3295 | if (!fp) { |
3296 | WARN(1, "(%p)->fl_owner NULL\n", fl); | |
3297 | return; | |
3298 | } | |
3299 | if (fp->fi_had_conflict) { | |
3300 | WARN(1, "duplicate break on %p\n", fp); | |
3301 | return; | |
3302 | } | |
0272e1fd BF |
3303 | /* |
3304 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 3305 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 3306 | * in time: |
0272e1fd BF |
3307 | */ |
3308 | fl->fl_break_time = 0; | |
1da177e4 | 3309 | |
02e1215f | 3310 | spin_lock(&fp->fi_lock); |
417c6629 JL |
3311 | fp->fi_had_conflict = true; |
3312 | /* | |
3313 | * If there are no delegations on the list, then we can't count on this | |
3314 | * lease ever being cleaned up. Set the fl_break_time to jiffies so that | |
3315 | * time_out_leases will do it ASAP. The fact that fi_had_conflict is now | |
3316 | * true should keep any new delegations from being hashed. | |
3317 | */ | |
3318 | if (list_empty(&fp->fi_delegations)) | |
3319 | fl->fl_break_time = jiffies; | |
3320 | else | |
3321 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
3322 | nfsd_break_one_deleg(dp); | |
02e1215f | 3323 | spin_unlock(&fp->fi_lock); |
1da177e4 LT |
3324 | } |
3325 | ||
1da177e4 LT |
3326 | static |
3327 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
3328 | { | |
3329 | if (arg & F_UNLCK) | |
3330 | return lease_modify(onlist, arg); | |
3331 | else | |
3332 | return -EAGAIN; | |
3333 | } | |
3334 | ||
7b021967 | 3335 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
3336 | .lm_break = nfsd_break_deleg_cb, |
3337 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
3338 | }; |
3339 | ||
7a8711c9 BF |
3340 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
3341 | { | |
3342 | if (nfsd4_has_session(cstate)) | |
3343 | return nfs_ok; | |
3344 | if (seqid == so->so_seqid - 1) | |
3345 | return nfserr_replay_me; | |
3346 | if (seqid == so->so_seqid) | |
3347 | return nfs_ok; | |
3348 | return nfserr_bad_seqid; | |
3349 | } | |
1da177e4 | 3350 | |
4b24ca7d JL |
3351 | static __be32 lookup_clientid(clientid_t *clid, |
3352 | struct nfsd4_compound_state *cstate, | |
3353 | struct nfsd_net *nn) | |
3354 | { | |
3355 | struct nfs4_client *found; | |
3356 | ||
3357 | if (cstate->clp) { | |
3358 | found = cstate->clp; | |
3359 | if (!same_clid(&found->cl_clientid, clid)) | |
3360 | return nfserr_stale_clientid; | |
3361 | return nfs_ok; | |
3362 | } | |
3363 | ||
3364 | if (STALE_CLIENTID(clid, nn)) | |
3365 | return nfserr_stale_clientid; | |
3366 | ||
3367 | /* | |
3368 | * For v4.1+ we get the client in the SEQUENCE op. If we don't have one | |
3369 | * cached already then we know this is for is for v4.0 and "sessions" | |
3370 | * will be false. | |
3371 | */ | |
3372 | WARN_ON_ONCE(cstate->session); | |
3373 | found = find_confirmed_client(clid, false, nn); | |
3374 | if (!found) | |
3375 | return nfserr_expired; | |
3376 | ||
3377 | /* Cache the nfs4_client in cstate! */ | |
3378 | cstate->clp = found; | |
3379 | atomic_inc(&found->cl_refcount); | |
3380 | return nfs_ok; | |
3381 | } | |
3382 | ||
b37ad28b | 3383 | __be32 |
6668958f | 3384 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
3320fef1 | 3385 | struct nfsd4_open *open, struct nfsd_net *nn) |
1da177e4 | 3386 | { |
1da177e4 LT |
3387 | clientid_t *clientid = &open->op_clientid; |
3388 | struct nfs4_client *clp = NULL; | |
3389 | unsigned int strhashval; | |
fe0750e5 | 3390 | struct nfs4_openowner *oo = NULL; |
4cdc951b | 3391 | __be32 status; |
1da177e4 | 3392 | |
2c142baa | 3393 | if (STALE_CLIENTID(&open->op_clientid, nn)) |
1da177e4 | 3394 | return nfserr_stale_clientid; |
32513b40 BF |
3395 | /* |
3396 | * In case we need it later, after we've already created the | |
3397 | * file and don't want to risk a further failure: | |
3398 | */ | |
3399 | open->op_file = nfsd4_alloc_file(); | |
3400 | if (open->op_file == NULL) | |
3401 | return nfserr_jukebox; | |
1da177e4 | 3402 | |
2d91e895 TM |
3403 | status = lookup_clientid(clientid, cstate, nn); |
3404 | if (status) | |
3405 | return status; | |
3406 | clp = cstate->clp; | |
3407 | ||
d4f0489f TM |
3408 | strhashval = ownerstr_hashval(&open->op_owner); |
3409 | oo = find_openstateowner_str(strhashval, open, clp); | |
fe0750e5 BF |
3410 | open->op_openowner = oo; |
3411 | if (!oo) { | |
bcf130f9 | 3412 | goto new_owner; |
1da177e4 | 3413 | } |
dad1c067 | 3414 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
0f442aa2 | 3415 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
3416 | release_openowner(oo); |
3417 | open->op_openowner = NULL; | |
bcf130f9 | 3418 | goto new_owner; |
0f442aa2 | 3419 | } |
4cdc951b BF |
3420 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
3421 | if (status) | |
3422 | return status; | |
4cdc951b | 3423 | goto alloc_stateid; |
bcf130f9 | 3424 | new_owner: |
13d6f66b | 3425 | oo = alloc_init_open_stateowner(strhashval, open, cstate); |
bcf130f9 BF |
3426 | if (oo == NULL) |
3427 | return nfserr_jukebox; | |
3428 | open->op_openowner = oo; | |
4cdc951b | 3429 | alloc_stateid: |
b49e084d | 3430 | open->op_stp = nfs4_alloc_open_stateid(clp); |
4cdc951b BF |
3431 | if (!open->op_stp) |
3432 | return nfserr_jukebox; | |
0f442aa2 | 3433 | return nfs_ok; |
1da177e4 LT |
3434 | } |
3435 | ||
b37ad28b | 3436 | static inline __be32 |
4a6e43e6 N |
3437 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
3438 | { | |
3439 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
3440 | return nfserr_openmode; | |
3441 | else | |
3442 | return nfs_ok; | |
3443 | } | |
3444 | ||
f459e453 | 3445 | static int share_access_to_flags(u32 share_access) |
52f4fb43 | 3446 | { |
f459e453 | 3447 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
52f4fb43 N |
3448 | } |
3449 | ||
38c2f4b1 | 3450 | static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) |
24a0111e | 3451 | { |
f459e453 | 3452 | struct nfs4_stid *ret; |
24a0111e | 3453 | |
38c2f4b1 | 3454 | ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); |
f459e453 BF |
3455 | if (!ret) |
3456 | return NULL; | |
3457 | return delegstateid(ret); | |
24a0111e BF |
3458 | } |
3459 | ||
8b289b2c BF |
3460 | static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) |
3461 | { | |
3462 | return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || | |
3463 | open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; | |
3464 | } | |
3465 | ||
b37ad28b | 3466 | static __be32 |
41d22663 | 3467 | nfs4_check_deleg(struct nfs4_client *cl, struct nfsd4_open *open, |
567d9829 N |
3468 | struct nfs4_delegation **dp) |
3469 | { | |
3470 | int flags; | |
b37ad28b | 3471 | __be32 status = nfserr_bad_stateid; |
dcd94cc2 | 3472 | struct nfs4_delegation *deleg; |
567d9829 | 3473 | |
dcd94cc2 TM |
3474 | deleg = find_deleg_stateid(cl, &open->op_delegate_stateid); |
3475 | if (deleg == NULL) | |
c44c5eeb | 3476 | goto out; |
24a0111e | 3477 | flags = share_access_to_flags(open->op_share_access); |
dcd94cc2 TM |
3478 | status = nfs4_check_delegmode(deleg, flags); |
3479 | if (status) { | |
3480 | nfs4_put_stid(&deleg->dl_stid); | |
3481 | goto out; | |
3482 | } | |
3483 | *dp = deleg; | |
c44c5eeb | 3484 | out: |
8b289b2c | 3485 | if (!nfsd4_is_deleg_cur(open)) |
c44c5eeb N |
3486 | return nfs_ok; |
3487 | if (status) | |
3488 | return status; | |
dad1c067 | 3489 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
c44c5eeb | 3490 | return nfs_ok; |
567d9829 N |
3491 | } |
3492 | ||
a46cb7f2 JL |
3493 | static struct nfs4_ol_stateid * |
3494 | nfsd4_find_existing_open(struct nfs4_file *fp, struct nfsd4_open *open) | |
1da177e4 | 3495 | { |
a46cb7f2 | 3496 | struct nfs4_ol_stateid *local, *ret = NULL; |
fe0750e5 | 3497 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 3498 | |
1d31a253 | 3499 | spin_lock(&fp->fi_lock); |
8beefa24 | 3500 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
3501 | /* ignore lock owners */ |
3502 | if (local->st_stateowner->so_is_open_owner == 0) | |
3503 | continue; | |
baeb4ff0 | 3504 | if (local->st_stateowner == &oo->oo_owner) { |
a46cb7f2 | 3505 | ret = local; |
d6f2bc5d | 3506 | atomic_inc(&ret->st_stid.sc_count); |
baeb4ff0 | 3507 | break; |
1d31a253 | 3508 | } |
1da177e4 | 3509 | } |
1d31a253 | 3510 | spin_unlock(&fp->fi_lock); |
a46cb7f2 | 3511 | return ret; |
1da177e4 LT |
3512 | } |
3513 | ||
21fb4016 BF |
3514 | static inline int nfs4_access_to_access(u32 nfs4_access) |
3515 | { | |
3516 | int flags = 0; | |
3517 | ||
3518 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
3519 | flags |= NFSD_MAY_READ; | |
3520 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
3521 | flags |= NFSD_MAY_WRITE; | |
3522 | return flags; | |
3523 | } | |
3524 | ||
7e6a72e5 CH |
3525 | static inline __be32 |
3526 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, | |
3527 | struct nfsd4_open *open) | |
3528 | { | |
3529 | struct iattr iattr = { | |
3530 | .ia_valid = ATTR_SIZE, | |
3531 | .ia_size = 0, | |
3532 | }; | |
3533 | if (!open->op_truncate) | |
3534 | return 0; | |
3535 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
3536 | return nfserr_inval; | |
3537 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); | |
3538 | } | |
3539 | ||
0c12eaff | 3540 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
6eb3a1d0 JL |
3541 | struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp, |
3542 | struct nfsd4_open *open) | |
f9d7562f | 3543 | { |
de18643d | 3544 | struct file *filp = NULL; |
f9d7562f | 3545 | __be32 status; |
0c12eaff CB |
3546 | int oflag = nfs4_access_to_omode(open->op_share_access); |
3547 | int access = nfs4_access_to_access(open->op_share_access); | |
baeb4ff0 | 3548 | unsigned char old_access_bmap, old_deny_bmap; |
0c12eaff | 3549 | |
de18643d | 3550 | spin_lock(&fp->fi_lock); |
baeb4ff0 JL |
3551 | |
3552 | /* | |
3553 | * Are we trying to set a deny mode that would conflict with | |
3554 | * current access? | |
3555 | */ | |
3556 | status = nfs4_file_check_deny(fp, open->op_share_deny); | |
3557 | if (status != nfs_ok) { | |
3558 | spin_unlock(&fp->fi_lock); | |
3559 | goto out; | |
3560 | } | |
3561 | ||
3562 | /* set access to the file */ | |
3563 | status = nfs4_file_get_access(fp, open->op_share_access); | |
3564 | if (status != nfs_ok) { | |
3565 | spin_unlock(&fp->fi_lock); | |
3566 | goto out; | |
3567 | } | |
3568 | ||
3569 | /* Set access bits in stateid */ | |
3570 | old_access_bmap = stp->st_access_bmap; | |
3571 | set_access(open->op_share_access, stp); | |
3572 | ||
3573 | /* Set new deny mask */ | |
3574 | old_deny_bmap = stp->st_deny_bmap; | |
3575 | set_deny(open->op_share_deny, stp); | |
3576 | fp->fi_share_deny |= (open->op_share_deny & NFS4_SHARE_DENY_BOTH); | |
3577 | ||
f9d7562f | 3578 | if (!fp->fi_fds[oflag]) { |
de18643d TM |
3579 | spin_unlock(&fp->fi_lock); |
3580 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, &filp); | |
f9d7562f | 3581 | if (status) |
baeb4ff0 | 3582 | goto out_put_access; |
de18643d TM |
3583 | spin_lock(&fp->fi_lock); |
3584 | if (!fp->fi_fds[oflag]) { | |
3585 | fp->fi_fds[oflag] = filp; | |
3586 | filp = NULL; | |
3587 | } | |
f9d7562f | 3588 | } |
de18643d TM |
3589 | spin_unlock(&fp->fi_lock); |
3590 | if (filp) | |
3591 | fput(filp); | |
f9d7562f | 3592 | |
7e6a72e5 CH |
3593 | status = nfsd4_truncate(rqstp, cur_fh, open); |
3594 | if (status) | |
3595 | goto out_put_access; | |
7e6a72e5 CH |
3596 | out: |
3597 | return status; | |
baeb4ff0 JL |
3598 | out_put_access: |
3599 | stp->st_access_bmap = old_access_bmap; | |
3600 | nfs4_file_put_access(fp, open->op_share_access); | |
3601 | reset_union_bmap_deny(bmap_to_share_mode(old_deny_bmap), stp); | |
3602 | goto out; | |
1da177e4 LT |
3603 | } |
3604 | ||
b37ad28b | 3605 | static __be32 |
dcef0413 | 3606 | 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 | 3607 | { |
b37ad28b | 3608 | __be32 status; |
baeb4ff0 | 3609 | unsigned char old_deny_bmap; |
1da177e4 | 3610 | |
6eb3a1d0 | 3611 | if (!test_access(open->op_share_access, stp)) |
baeb4ff0 | 3612 | return nfs4_get_vfs_file(rqstp, fp, cur_fh, stp, open); |
7e6a72e5 | 3613 | |
baeb4ff0 JL |
3614 | /* test and set deny mode */ |
3615 | spin_lock(&fp->fi_lock); | |
3616 | status = nfs4_file_check_deny(fp, open->op_share_deny); | |
3617 | if (status == nfs_ok) { | |
3618 | old_deny_bmap = stp->st_deny_bmap; | |
3619 | set_deny(open->op_share_deny, stp); | |
3620 | fp->fi_share_deny |= | |
3621 | (open->op_share_deny & NFS4_SHARE_DENY_BOTH); | |
3622 | } | |
3623 | spin_unlock(&fp->fi_lock); | |
3624 | ||
3625 | if (status != nfs_ok) | |
1da177e4 | 3626 | return status; |
1da177e4 | 3627 | |
baeb4ff0 JL |
3628 | status = nfsd4_truncate(rqstp, cur_fh, open); |
3629 | if (status != nfs_ok) | |
3630 | reset_union_bmap_deny(old_deny_bmap, stp); | |
3631 | return status; | |
3632 | } | |
1da177e4 | 3633 | |
1da177e4 | 3634 | static void |
1255a8f3 | 3635 | nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session) |
1da177e4 | 3636 | { |
dad1c067 | 3637 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
1da177e4 LT |
3638 | } |
3639 | ||
14a24e99 BF |
3640 | /* Should we give out recallable state?: */ |
3641 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
3642 | { | |
3643 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
3644 | return true; | |
3645 | /* | |
3646 | * In the sessions case, since we don't have to establish a | |
3647 | * separate connection for callbacks, we assume it's OK | |
3648 | * until we hear otherwise: | |
3649 | */ | |
3650 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
3651 | } | |
3652 | ||
d564fbec | 3653 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_file *fp, int flag) |
22d38c4c BF |
3654 | { |
3655 | struct file_lock *fl; | |
3656 | ||
3657 | fl = locks_alloc_lock(); | |
3658 | if (!fl) | |
3659 | return NULL; | |
3660 | locks_init_lock(fl); | |
3661 | fl->fl_lmops = &nfsd_lease_mng_ops; | |
617588d5 | 3662 | fl->fl_flags = FL_DELEG; |
22d38c4c BF |
3663 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; |
3664 | fl->fl_end = OFFSET_MAX; | |
d564fbec | 3665 | fl->fl_owner = (fl_owner_t)fp; |
22d38c4c | 3666 | fl->fl_pid = current->tgid; |
22d38c4c BF |
3667 | return fl; |
3668 | } | |
3669 | ||
99c41515 | 3670 | static int nfs4_setlease(struct nfs4_delegation *dp) |
edab9782 | 3671 | { |
11b9164a | 3672 | struct nfs4_file *fp = dp->dl_stid.sc_file; |
edab9782 | 3673 | struct file_lock *fl; |
417c6629 JL |
3674 | struct file *filp; |
3675 | int status = 0; | |
edab9782 | 3676 | |
d564fbec | 3677 | fl = nfs4_alloc_init_lease(fp, NFS4_OPEN_DELEGATE_READ); |
edab9782 BF |
3678 | if (!fl) |
3679 | return -ENOMEM; | |
417c6629 JL |
3680 | filp = find_readable_file(fp); |
3681 | if (!filp) { | |
3682 | /* We should always have a readable file here */ | |
3683 | WARN_ON_ONCE(1); | |
3684 | return -EBADF; | |
3685 | } | |
3686 | fl->fl_file = filp; | |
3687 | status = vfs_setlease(filp, fl->fl_type, &fl); | |
3688 | if (status) { | |
3689 | locks_free_lock(fl); | |
3690 | goto out_fput; | |
3691 | } | |
3692 | spin_lock(&state_lock); | |
3693 | spin_lock(&fp->fi_lock); | |
3694 | /* Did the lease get broken before we took the lock? */ | |
3695 | status = -EAGAIN; | |
3696 | if (fp->fi_had_conflict) | |
3697 | goto out_unlock; | |
3698 | /* Race breaker */ | |
3699 | if (fp->fi_lease) { | |
3700 | status = 0; | |
3701 | atomic_inc(&fp->fi_delegees); | |
3702 | hash_delegation_locked(dp, fp); | |
3703 | goto out_unlock; | |
3704 | } | |
acfdf5c3 | 3705 | fp->fi_lease = fl; |
417c6629 | 3706 | fp->fi_deleg_file = filp; |
acfdf5c3 | 3707 | atomic_set(&fp->fi_delegees, 1); |
931ee56c | 3708 | hash_delegation_locked(dp, fp); |
417c6629 | 3709 | spin_unlock(&fp->fi_lock); |
cdc97505 | 3710 | spin_unlock(&state_lock); |
acfdf5c3 | 3711 | return 0; |
417c6629 JL |
3712 | out_unlock: |
3713 | spin_unlock(&fp->fi_lock); | |
3714 | spin_unlock(&state_lock); | |
3715 | out_fput: | |
3716 | fput(filp); | |
e873088f | 3717 | return status; |
acfdf5c3 BF |
3718 | } |
3719 | ||
0b26693c JL |
3720 | static struct nfs4_delegation * |
3721 | nfs4_set_delegation(struct nfs4_client *clp, struct svc_fh *fh, | |
3722 | struct nfs4_file *fp) | |
acfdf5c3 | 3723 | { |
0b26693c JL |
3724 | int status; |
3725 | struct nfs4_delegation *dp; | |
417c6629 | 3726 | |
bf7bd3e9 | 3727 | if (fp->fi_had_conflict) |
0b26693c JL |
3728 | return ERR_PTR(-EAGAIN); |
3729 | ||
3730 | dp = alloc_init_deleg(clp, fh); | |
3731 | if (!dp) | |
3732 | return ERR_PTR(-ENOMEM); | |
3733 | ||
bf7bd3e9 | 3734 | get_nfs4_file(fp); |
417c6629 JL |
3735 | spin_lock(&state_lock); |
3736 | spin_lock(&fp->fi_lock); | |
11b9164a | 3737 | dp->dl_stid.sc_file = fp; |
417c6629 JL |
3738 | if (!fp->fi_lease) { |
3739 | spin_unlock(&fp->fi_lock); | |
3740 | spin_unlock(&state_lock); | |
0b26693c JL |
3741 | status = nfs4_setlease(dp); |
3742 | goto out; | |
417c6629 | 3743 | } |
cbf7a75b | 3744 | atomic_inc(&fp->fi_delegees); |
acfdf5c3 | 3745 | if (fp->fi_had_conflict) { |
417c6629 JL |
3746 | status = -EAGAIN; |
3747 | goto out_unlock; | |
acfdf5c3 | 3748 | } |
931ee56c | 3749 | hash_delegation_locked(dp, fp); |
0b26693c | 3750 | status = 0; |
417c6629 JL |
3751 | out_unlock: |
3752 | spin_unlock(&fp->fi_lock); | |
cdc97505 | 3753 | spin_unlock(&state_lock); |
0b26693c JL |
3754 | out: |
3755 | if (status) { | |
6011695d | 3756 | nfs4_put_stid(&dp->dl_stid); |
0b26693c JL |
3757 | return ERR_PTR(status); |
3758 | } | |
3759 | return dp; | |
edab9782 BF |
3760 | } |
3761 | ||
4aa8913c BH |
3762 | static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) |
3763 | { | |
3764 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3765 | if (status == -EAGAIN) | |
3766 | open->op_why_no_deleg = WND4_CONTENTION; | |
3767 | else { | |
3768 | open->op_why_no_deleg = WND4_RESOURCE; | |
3769 | switch (open->op_deleg_want) { | |
3770 | case NFS4_SHARE_WANT_READ_DELEG: | |
3771 | case NFS4_SHARE_WANT_WRITE_DELEG: | |
3772 | case NFS4_SHARE_WANT_ANY_DELEG: | |
3773 | break; | |
3774 | case NFS4_SHARE_WANT_CANCEL: | |
3775 | open->op_why_no_deleg = WND4_CANCELLED; | |
3776 | break; | |
3777 | case NFS4_SHARE_WANT_NO_DELEG: | |
063b0fb9 | 3778 | WARN_ON_ONCE(1); |
4aa8913c BH |
3779 | } |
3780 | } | |
3781 | } | |
3782 | ||
1da177e4 LT |
3783 | /* |
3784 | * Attempt to hand out a delegation. | |
99c41515 BF |
3785 | * |
3786 | * Note we don't support write delegations, and won't until the vfs has | |
3787 | * proper support for them. | |
1da177e4 LT |
3788 | */ |
3789 | static void | |
4cf59221 JL |
3790 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, |
3791 | struct nfs4_ol_stateid *stp) | |
1da177e4 LT |
3792 | { |
3793 | struct nfs4_delegation *dp; | |
4cf59221 JL |
3794 | struct nfs4_openowner *oo = openowner(stp->st_stateowner); |
3795 | struct nfs4_client *clp = stp->st_stid.sc_client; | |
14a24e99 | 3796 | int cb_up; |
99c41515 | 3797 | int status = 0; |
1da177e4 | 3798 | |
fe0750e5 | 3799 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
7b190fec N |
3800 | open->op_recall = 0; |
3801 | switch (open->op_claim_type) { | |
3802 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 3803 | if (!cb_up) |
7b190fec | 3804 | open->op_recall = 1; |
99c41515 BF |
3805 | if (open->op_delegate_type != NFS4_OPEN_DELEGATE_READ) |
3806 | goto out_no_deleg; | |
7b190fec N |
3807 | break; |
3808 | case NFS4_OPEN_CLAIM_NULL: | |
ed47b062 | 3809 | case NFS4_OPEN_CLAIM_FH: |
99c41515 BF |
3810 | /* |
3811 | * Let's not give out any delegations till everyone's | |
3812 | * had the chance to reclaim theirs.... | |
3813 | */ | |
4cf59221 | 3814 | if (locks_in_grace(clp->net)) |
99c41515 | 3815 | goto out_no_deleg; |
dad1c067 | 3816 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
99c41515 | 3817 | goto out_no_deleg; |
9a0590ae SD |
3818 | /* |
3819 | * Also, if the file was opened for write or | |
3820 | * create, there's a good chance the client's | |
3821 | * about to write to it, resulting in an | |
3822 | * immediate recall (since we don't support | |
3823 | * write delegations): | |
3824 | */ | |
7b190fec | 3825 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
99c41515 BF |
3826 | goto out_no_deleg; |
3827 | if (open->op_create == NFS4_OPEN_CREATE) | |
3828 | goto out_no_deleg; | |
7b190fec N |
3829 | break; |
3830 | default: | |
99c41515 | 3831 | goto out_no_deleg; |
7b190fec | 3832 | } |
11b9164a | 3833 | dp = nfs4_set_delegation(clp, fh, stp->st_stid.sc_file); |
0b26693c | 3834 | if (IS_ERR(dp)) |
dd239cc0 | 3835 | goto out_no_deleg; |
1da177e4 | 3836 | |
d5477a8d | 3837 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 3838 | |
8c10cbdb | 3839 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
d5477a8d | 3840 | STATEID_VAL(&dp->dl_stid.sc_stateid)); |
99c41515 | 3841 | open->op_delegate_type = NFS4_OPEN_DELEGATE_READ; |
67cb1279 | 3842 | nfs4_put_stid(&dp->dl_stid); |
dd239cc0 | 3843 | return; |
dd239cc0 | 3844 | out_no_deleg: |
99c41515 BF |
3845 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE; |
3846 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && | |
d08d32e6 | 3847 | open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) { |
99c41515 | 3848 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
d08d32e6 BF |
3849 | open->op_recall = 1; |
3850 | } | |
99c41515 BF |
3851 | |
3852 | /* 4.1 client asking for a delegation? */ | |
3853 | if (open->op_deleg_want) | |
3854 | nfsd4_open_deleg_none_ext(open, status); | |
3855 | return; | |
1da177e4 LT |
3856 | } |
3857 | ||
e27f49c3 BH |
3858 | static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, |
3859 | struct nfs4_delegation *dp) | |
3860 | { | |
3861 | if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && | |
3862 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
3863 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3864 | open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; | |
3865 | } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && | |
3866 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
3867 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3868 | open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; | |
3869 | } | |
3870 | /* Otherwise the client must be confused wanting a delegation | |
3871 | * it already has, therefore we don't return | |
3872 | * NFS4_OPEN_DELEGATE_NONE_EXT and reason. | |
3873 | */ | |
3874 | } | |
3875 | ||
1da177e4 LT |
3876 | /* |
3877 | * called with nfs4_lock_state() held. | |
3878 | */ | |
b37ad28b | 3879 | __be32 |
1da177e4 LT |
3880 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
3881 | { | |
6668958f | 3882 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
38c2f4b1 | 3883 | struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; |
1da177e4 | 3884 | struct nfs4_file *fp = NULL; |
dcef0413 | 3885 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 3886 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 3887 | __be32 status; |
1da177e4 | 3888 | |
1da177e4 LT |
3889 | /* |
3890 | * Lookup file; if found, lookup stateid and check open request, | |
3891 | * and check for delegations in the process of being recalled. | |
3892 | * If not found, create the nfs4_file struct | |
3893 | */ | |
f9c00c3a | 3894 | fp = find_or_add_file(open->op_file, ¤t_fh->fh_handle); |
950e0118 | 3895 | if (fp != open->op_file) { |
41d22663 | 3896 | status = nfs4_check_deleg(cl, open, &dp); |
c44c5eeb N |
3897 | if (status) |
3898 | goto out; | |
a46cb7f2 | 3899 | stp = nfsd4_find_existing_open(fp, open); |
1da177e4 | 3900 | } else { |
950e0118 | 3901 | open->op_file = NULL; |
c44c5eeb | 3902 | status = nfserr_bad_stateid; |
8b289b2c | 3903 | if (nfsd4_is_deleg_cur(open)) |
c44c5eeb | 3904 | goto out; |
3e772463 | 3905 | status = nfserr_jukebox; |
1da177e4 LT |
3906 | } |
3907 | ||
3908 | /* | |
3909 | * OPEN the file, or upgrade an existing OPEN. | |
3910 | * If truncate fails, the OPEN fails. | |
3911 | */ | |
3912 | if (stp) { | |
3913 | /* Stateid was found, this is an OPEN upgrade */ | |
f9d7562f | 3914 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
1da177e4 LT |
3915 | if (status) |
3916 | goto out; | |
3917 | } else { | |
4cdc951b BF |
3918 | stp = open->op_stp; |
3919 | open->op_stp = NULL; | |
996e0938 | 3920 | init_open_stateid(stp, fp, open); |
6eb3a1d0 JL |
3921 | status = nfs4_get_vfs_file(rqstp, fp, current_fh, stp, open); |
3922 | if (status) { | |
3923 | release_open_stateid(stp); | |
3924 | goto out; | |
3925 | } | |
1da177e4 | 3926 | } |
dcef0413 BF |
3927 | update_stateid(&stp->st_stid.sc_stateid); |
3928 | memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3929 | |
d24433cd | 3930 | if (nfsd4_has_session(&resp->cstate)) { |
d24433cd BH |
3931 | if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { |
3932 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3933 | open->op_why_no_deleg = WND4_NOT_WANTED; | |
3934 | goto nodeleg; | |
3935 | } | |
3936 | } | |
3937 | ||
1da177e4 LT |
3938 | /* |
3939 | * Attempt to hand out a delegation. No error return, because the | |
3940 | * OPEN succeeds even if we fail. | |
3941 | */ | |
4cf59221 | 3942 | nfs4_open_delegation(current_fh, open, stp); |
d24433cd | 3943 | nodeleg: |
1da177e4 LT |
3944 | status = nfs_ok; |
3945 | ||
8c10cbdb | 3946 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
dcef0413 | 3947 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
1da177e4 | 3948 | out: |
d24433cd BH |
3949 | /* 4.1 client trying to upgrade/downgrade delegation? */ |
3950 | if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && | |
e27f49c3 BH |
3951 | open->op_deleg_want) |
3952 | nfsd4_deleg_xgrade_none_ext(open, dp); | |
d24433cd | 3953 | |
13cd2184 N |
3954 | if (fp) |
3955 | put_nfs4_file(fp); | |
37515177 | 3956 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
1255a8f3 | 3957 | nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate)); |
1da177e4 LT |
3958 | /* |
3959 | * To finish the open response, we just need to set the rflags. | |
3960 | */ | |
3961 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
dad1c067 | 3962 | if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && |
6668958f | 3963 | !nfsd4_has_session(&resp->cstate)) |
1da177e4 | 3964 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
dcd94cc2 TM |
3965 | if (dp) |
3966 | nfs4_put_stid(&dp->dl_stid); | |
d6f2bc5d TM |
3967 | if (stp) |
3968 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 LT |
3969 | |
3970 | return status; | |
3971 | } | |
3972 | ||
58fb12e6 JL |
3973 | void nfsd4_cleanup_open_state(struct nfsd4_compound_state *cstate, |
3974 | struct nfsd4_open *open, __be32 status) | |
d29b20cd BF |
3975 | { |
3976 | if (open->op_openowner) { | |
d3134b10 JL |
3977 | struct nfs4_stateowner *so = &open->op_openowner->oo_owner; |
3978 | ||
3979 | nfsd4_cstate_assign_replay(cstate, so); | |
3980 | nfs4_put_stateowner(so); | |
d29b20cd | 3981 | } |
32513b40 BF |
3982 | if (open->op_file) |
3983 | nfsd4_free_file(open->op_file); | |
4cdc951b | 3984 | if (open->op_stp) |
6011695d | 3985 | nfs4_put_stid(&open->op_stp->st_stid); |
d29b20cd BF |
3986 | } |
3987 | ||
b37ad28b | 3988 | __be32 |
b591480b BF |
3989 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3990 | clientid_t *clid) | |
1da177e4 LT |
3991 | { |
3992 | struct nfs4_client *clp; | |
b37ad28b | 3993 | __be32 status; |
7f2210fa | 3994 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
3995 | |
3996 | nfs4_lock_state(); | |
3997 | dprintk("process_renew(%08x/%08x): starting\n", | |
3998 | clid->cl_boot, clid->cl_id); | |
4b24ca7d | 3999 | status = lookup_clientid(clid, cstate, nn); |
9b2ef62b | 4000 | if (status) |
1da177e4 | 4001 | goto out; |
4b24ca7d | 4002 | clp = cstate->clp; |
1da177e4 | 4003 | status = nfserr_cb_path_down; |
ea1da636 | 4004 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 4005 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
4006 | goto out; |
4007 | status = nfs_ok; | |
4008 | out: | |
4009 | nfs4_unlock_state(); | |
4010 | return status; | |
4011 | } | |
4012 | ||
a76b4319 | 4013 | static void |
12760c66 | 4014 | nfsd4_end_grace(struct nfsd_net *nn) |
a76b4319 | 4015 | { |
33dcc481 | 4016 | /* do nothing if grace period already ended */ |
a51c84ed | 4017 | if (nn->grace_ended) |
33dcc481 JL |
4018 | return; |
4019 | ||
a76b4319 | 4020 | dprintk("NFSD: end of grace period\n"); |
a51c84ed | 4021 | nn->grace_ended = true; |
12760c66 | 4022 | nfsd4_record_grace_done(nn, nn->boot_time); |
5e1533c7 | 4023 | locks_end_grace(&nn->nfsd4_manager); |
e46b498c BF |
4024 | /* |
4025 | * Now that every NFSv4 client has had the chance to recover and | |
4026 | * to see the (possibly new, possibly shorter) lease time, we | |
4027 | * can safely set the next grace time to the current lease time: | |
4028 | */ | |
5284b44e | 4029 | nn->nfsd4_grace = nn->nfsd4_lease; |
a76b4319 N |
4030 | } |
4031 | ||
fd39ca9a | 4032 | static time_t |
09121281 | 4033 | nfs4_laundromat(struct nfsd_net *nn) |
1da177e4 LT |
4034 | { |
4035 | struct nfs4_client *clp; | |
fe0750e5 | 4036 | struct nfs4_openowner *oo; |
1da177e4 LT |
4037 | struct nfs4_delegation *dp; |
4038 | struct list_head *pos, *next, reaplist; | |
3d733711 | 4039 | time_t cutoff = get_seconds() - nn->nfsd4_lease; |
a832e7ae | 4040 | time_t t, new_timeo = nn->nfsd4_lease; |
1da177e4 LT |
4041 | |
4042 | nfs4_lock_state(); | |
4043 | ||
4044 | dprintk("NFSD: laundromat service - starting\n"); | |
12760c66 | 4045 | nfsd4_end_grace(nn); |
36acb66b | 4046 | INIT_LIST_HEAD(&reaplist); |
c9a49628 | 4047 | spin_lock(&nn->client_lock); |
5ed58bb2 | 4048 | list_for_each_safe(pos, next, &nn->client_lru) { |
1da177e4 LT |
4049 | clp = list_entry(pos, struct nfs4_client, cl_lru); |
4050 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
4051 | t = clp->cl_time - cutoff; | |
a832e7ae | 4052 | new_timeo = min(new_timeo, t); |
1da177e4 LT |
4053 | break; |
4054 | } | |
221a6876 | 4055 | if (mark_client_expired_locked(clp)) { |
d7682988 BH |
4056 | dprintk("NFSD: client in use (clientid %08x)\n", |
4057 | clp->cl_clientid.cl_id); | |
4058 | continue; | |
4059 | } | |
221a6876 | 4060 | list_move(&clp->cl_lru, &reaplist); |
36acb66b | 4061 | } |
c9a49628 | 4062 | spin_unlock(&nn->client_lock); |
36acb66b BH |
4063 | list_for_each_safe(pos, next, &reaplist) { |
4064 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
4065 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
4066 | clp->cl_clientid.cl_id); | |
4067 | expire_client(clp); | |
4068 | } | |
cdc97505 | 4069 | spin_lock(&state_lock); |
e8c69d17 | 4070 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 | 4071 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
4e37a7c2 SK |
4072 | if (net_generic(dp->dl_stid.sc_client->net, nfsd_net_id) != nn) |
4073 | continue; | |
1da177e4 | 4074 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { |
a832e7ae JL |
4075 | t = dp->dl_time - cutoff; |
4076 | new_timeo = min(new_timeo, t); | |
1da177e4 LT |
4077 | break; |
4078 | } | |
42690676 JL |
4079 | unhash_delegation_locked(dp); |
4080 | list_add(&dp->dl_recall_lru, &reaplist); | |
1da177e4 | 4081 | } |
cdc97505 | 4082 | spin_unlock(&state_lock); |
2d4a532d JL |
4083 | while (!list_empty(&reaplist)) { |
4084 | dp = list_first_entry(&reaplist, struct nfs4_delegation, | |
4085 | dl_recall_lru); | |
4086 | list_del_init(&dp->dl_recall_lru); | |
3bd64a5b | 4087 | revoke_delegation(dp); |
1da177e4 | 4088 | } |
73758fed | 4089 | list_for_each_safe(pos, next, &nn->close_lru) { |
fe0750e5 BF |
4090 | oo = container_of(pos, struct nfs4_openowner, oo_close_lru); |
4091 | if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { | |
a832e7ae JL |
4092 | t = oo->oo_time - cutoff; |
4093 | new_timeo = min(new_timeo, t); | |
1da177e4 LT |
4094 | break; |
4095 | } | |
d3134b10 | 4096 | release_last_closed_stateid(oo); |
1da177e4 | 4097 | } |
a832e7ae | 4098 | new_timeo = max_t(time_t, new_timeo, NFSD_LAUNDROMAT_MINTIMEOUT); |
1da177e4 | 4099 | nfs4_unlock_state(); |
a832e7ae | 4100 | return new_timeo; |
1da177e4 LT |
4101 | } |
4102 | ||
a254b246 HH |
4103 | static struct workqueue_struct *laundry_wq; |
4104 | static void laundromat_main(struct work_struct *); | |
a254b246 HH |
4105 | |
4106 | static void | |
09121281 | 4107 | laundromat_main(struct work_struct *laundry) |
1da177e4 LT |
4108 | { |
4109 | time_t t; | |
09121281 SK |
4110 | struct delayed_work *dwork = container_of(laundry, struct delayed_work, |
4111 | work); | |
4112 | struct nfsd_net *nn = container_of(dwork, struct nfsd_net, | |
4113 | laundromat_work); | |
1da177e4 | 4114 | |
09121281 | 4115 | t = nfs4_laundromat(nn); |
1da177e4 | 4116 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); |
09121281 | 4117 | queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ); |
1da177e4 LT |
4118 | } |
4119 | ||
f7a4d872 | 4120 | static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) |
1da177e4 | 4121 | { |
11b9164a | 4122 | if (!nfsd_fh_match(&fhp->fh_handle, &stp->st_stid.sc_file->fi_fhandle)) |
f7a4d872 BF |
4123 | return nfserr_bad_stateid; |
4124 | return nfs_ok; | |
1da177e4 LT |
4125 | } |
4126 | ||
1da177e4 | 4127 | static inline int |
82c5ff1b | 4128 | access_permit_read(struct nfs4_ol_stateid *stp) |
1da177e4 | 4129 | { |
82c5ff1b JL |
4130 | return test_access(NFS4_SHARE_ACCESS_READ, stp) || |
4131 | test_access(NFS4_SHARE_ACCESS_BOTH, stp) || | |
4132 | test_access(NFS4_SHARE_ACCESS_WRITE, stp); | |
1da177e4 LT |
4133 | } |
4134 | ||
4135 | static inline int | |
82c5ff1b | 4136 | access_permit_write(struct nfs4_ol_stateid *stp) |
1da177e4 | 4137 | { |
82c5ff1b JL |
4138 | return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || |
4139 | test_access(NFS4_SHARE_ACCESS_BOTH, stp); | |
1da177e4 LT |
4140 | } |
4141 | ||
4142 | static | |
dcef0413 | 4143 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
1da177e4 | 4144 | { |
b37ad28b | 4145 | __be32 status = nfserr_openmode; |
1da177e4 | 4146 | |
02921914 BF |
4147 | /* For lock stateid's, we test the parent open, not the lock: */ |
4148 | if (stp->st_openstp) | |
4149 | stp = stp->st_openstp; | |
82c5ff1b | 4150 | if ((flags & WR_STATE) && !access_permit_write(stp)) |
1da177e4 | 4151 | goto out; |
82c5ff1b | 4152 | if ((flags & RD_STATE) && !access_permit_read(stp)) |
1da177e4 LT |
4153 | goto out; |
4154 | status = nfs_ok; | |
4155 | out: | |
4156 | return status; | |
4157 | } | |
4158 | ||
b37ad28b | 4159 | static inline __be32 |
5ccb0066 | 4160 | check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags) |
1da177e4 | 4161 | { |
203a8c8e | 4162 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 4163 | return nfs_ok; |
5ccb0066 | 4164 | else if (locks_in_grace(net)) { |
25985edc | 4165 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
4166 | * conflicting state; so we must wait out the grace period. */ |
4167 | return nfserr_grace; | |
4168 | } else if (flags & WR_STATE) | |
4169 | return nfs4_share_conflict(current_fh, | |
4170 | NFS4_SHARE_DENY_WRITE); | |
4171 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
4172 | return nfs4_share_conflict(current_fh, | |
4173 | NFS4_SHARE_DENY_READ); | |
4174 | } | |
4175 | ||
4176 | /* | |
4177 | * Allow READ/WRITE during grace period on recovered state only for files | |
4178 | * that are not able to provide mandatory locking. | |
4179 | */ | |
4180 | static inline int | |
5ccb0066 | 4181 | grace_disallows_io(struct net *net, struct inode *inode) |
1da177e4 | 4182 | { |
5ccb0066 | 4183 | return locks_in_grace(net) && mandatory_lock(inode); |
1da177e4 LT |
4184 | } |
4185 | ||
81b82965 BF |
4186 | /* Returns true iff a is later than b: */ |
4187 | static bool stateid_generation_after(stateid_t *a, stateid_t *b) | |
4188 | { | |
1a9357f4 | 4189 | return (s32)(a->si_generation - b->si_generation) > 0; |
81b82965 BF |
4190 | } |
4191 | ||
57b7b43b | 4192 | static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 4193 | { |
6668958f AA |
4194 | /* |
4195 | * When sessions are used the stateid generation number is ignored | |
4196 | * when it is zero. | |
4197 | */ | |
28dde241 | 4198 | if (has_session && in->si_generation == 0) |
81b82965 BF |
4199 | return nfs_ok; |
4200 | ||
4201 | if (in->si_generation == ref->si_generation) | |
4202 | return nfs_ok; | |
6668958f | 4203 | |
0836f587 | 4204 | /* If the client sends us a stateid from the future, it's buggy: */ |
81b82965 | 4205 | if (stateid_generation_after(in, ref)) |
0836f587 BF |
4206 | return nfserr_bad_stateid; |
4207 | /* | |
81b82965 BF |
4208 | * However, we could see a stateid from the past, even from a |
4209 | * non-buggy client. For example, if the client sends a lock | |
4210 | * while some IO is outstanding, the lock may bump si_generation | |
4211 | * while the IO is still in flight. The client could avoid that | |
4212 | * situation by waiting for responses on all the IO requests, | |
4213 | * but better performance may result in retrying IO that | |
4214 | * receives an old_stateid error if requests are rarely | |
4215 | * reordered in flight: | |
0836f587 | 4216 | */ |
81b82965 | 4217 | return nfserr_old_stateid; |
0836f587 BF |
4218 | } |
4219 | ||
7df302f7 | 4220 | static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) |
17456804 | 4221 | { |
97b7e3b6 BF |
4222 | struct nfs4_stid *s; |
4223 | struct nfs4_ol_stateid *ols; | |
1af71cc8 | 4224 | __be32 status = nfserr_bad_stateid; |
17456804 | 4225 | |
7df302f7 | 4226 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
1af71cc8 | 4227 | return status; |
7df302f7 CL |
4228 | /* Client debugging aid. */ |
4229 | if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) { | |
4230 | char addr_str[INET6_ADDRSTRLEN]; | |
4231 | rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str, | |
4232 | sizeof(addr_str)); | |
4233 | pr_warn_ratelimited("NFSD: client %s testing state ID " | |
4234 | "with incorrect client ID\n", addr_str); | |
1af71cc8 | 4235 | return status; |
7df302f7 | 4236 | } |
1af71cc8 JL |
4237 | spin_lock(&cl->cl_lock); |
4238 | s = find_stateid_locked(cl, stateid); | |
97b7e3b6 | 4239 | if (!s) |
1af71cc8 | 4240 | goto out_unlock; |
36279ac1 | 4241 | status = check_stateid_generation(stateid, &s->sc_stateid, 1); |
17456804 | 4242 | if (status) |
1af71cc8 | 4243 | goto out_unlock; |
23340032 BF |
4244 | switch (s->sc_type) { |
4245 | case NFS4_DELEG_STID: | |
1af71cc8 JL |
4246 | status = nfs_ok; |
4247 | break; | |
3bd64a5b | 4248 | case NFS4_REVOKED_DELEG_STID: |
1af71cc8 JL |
4249 | status = nfserr_deleg_revoked; |
4250 | break; | |
23340032 BF |
4251 | case NFS4_OPEN_STID: |
4252 | case NFS4_LOCK_STID: | |
4253 | ols = openlockstateid(s); | |
4254 | if (ols->st_stateowner->so_is_open_owner | |
4255 | && !(openowner(ols->st_stateowner)->oo_flags | |
4256 | & NFS4_OO_CONFIRMED)) | |
1af71cc8 JL |
4257 | status = nfserr_bad_stateid; |
4258 | else | |
4259 | status = nfs_ok; | |
4260 | break; | |
23340032 BF |
4261 | default: |
4262 | printk("unknown stateid type %x\n", s->sc_type); | |
b0fc29d6 | 4263 | /* Fallthrough */ |
23340032 | 4264 | case NFS4_CLOSED_STID: |
b0fc29d6 | 4265 | case NFS4_CLOSED_DELEG_STID: |
1af71cc8 | 4266 | status = nfserr_bad_stateid; |
23340032 | 4267 | } |
1af71cc8 JL |
4268 | out_unlock: |
4269 | spin_unlock(&cl->cl_lock); | |
4270 | return status; | |
17456804 BS |
4271 | } |
4272 | ||
2dd6e458 TM |
4273 | static __be32 |
4274 | nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate, | |
4275 | stateid_t *stateid, unsigned char typemask, | |
4276 | struct nfs4_stid **s, struct nfsd_net *nn) | |
38c2f4b1 | 4277 | { |
0eb6f20a | 4278 | __be32 status; |
38c2f4b1 BF |
4279 | |
4280 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
4281 | return nfserr_bad_stateid; | |
4b24ca7d | 4282 | status = lookup_clientid(&stateid->si_opaque.so_clid, cstate, nn); |
a8a7c677 | 4283 | if (status == nfserr_stale_clientid) { |
4b24ca7d | 4284 | if (cstate->session) |
a8a7c677 | 4285 | return nfserr_bad_stateid; |
38c2f4b1 | 4286 | return nfserr_stale_stateid; |
a8a7c677 | 4287 | } |
0eb6f20a BF |
4288 | if (status) |
4289 | return status; | |
4b24ca7d | 4290 | *s = find_stateid_by_type(cstate->clp, stateid, typemask); |
38c2f4b1 BF |
4291 | if (!*s) |
4292 | return nfserr_bad_stateid; | |
4293 | return nfs_ok; | |
38c2f4b1 BF |
4294 | } |
4295 | ||
1da177e4 LT |
4296 | /* |
4297 | * Checks for stateid operations | |
4298 | */ | |
b37ad28b | 4299 | __be32 |
5ccb0066 | 4300 | nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate, |
dd453dfd | 4301 | stateid_t *stateid, int flags, struct file **filpp) |
1da177e4 | 4302 | { |
69064a27 | 4303 | struct nfs4_stid *s; |
dcef0413 | 4304 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 4305 | struct nfs4_delegation *dp = NULL; |
dd453dfd | 4306 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 4307 | struct inode *ino = current_fh->fh_dentry->d_inode; |
3320fef1 | 4308 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
14bcab1a | 4309 | struct file *file = NULL; |
b37ad28b | 4310 | __be32 status; |
1da177e4 | 4311 | |
1da177e4 LT |
4312 | if (filpp) |
4313 | *filpp = NULL; | |
4314 | ||
5ccb0066 | 4315 | if (grace_disallows_io(net, ino)) |
1da177e4 LT |
4316 | return nfserr_grace; |
4317 | ||
4318 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
5ccb0066 | 4319 | return check_special_stateids(net, current_fh, stateid, flags); |
1da177e4 | 4320 | |
14bcab1a TM |
4321 | nfs4_lock_state(); |
4322 | ||
2dd6e458 | 4323 | status = nfsd4_lookup_stateid(cstate, stateid, |
db24b3b4 | 4324 | NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, |
2dd6e458 | 4325 | &s, nn); |
38c2f4b1 | 4326 | if (status) |
fd911011 | 4327 | goto unlock_state; |
69064a27 BF |
4328 | status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); |
4329 | if (status) | |
4330 | goto out; | |
f7a4d872 BF |
4331 | switch (s->sc_type) { |
4332 | case NFS4_DELEG_STID: | |
69064a27 | 4333 | dp = delegstateid(s); |
dc9bf700 BF |
4334 | status = nfs4_check_delegmode(dp, flags); |
4335 | if (status) | |
4336 | goto out; | |
43b0178e | 4337 | if (filpp) { |
11b9164a | 4338 | file = dp->dl_stid.sc_file->fi_deleg_file; |
14bcab1a | 4339 | if (!file) { |
063b0fb9 BF |
4340 | WARN_ON_ONCE(1); |
4341 | status = nfserr_serverfault; | |
4342 | goto out; | |
4343 | } | |
de18643d | 4344 | get_file(file); |
43b0178e | 4345 | } |
f7a4d872 BF |
4346 | break; |
4347 | case NFS4_OPEN_STID: | |
4348 | case NFS4_LOCK_STID: | |
69064a27 | 4349 | stp = openlockstateid(s); |
f7a4d872 BF |
4350 | status = nfs4_check_fh(current_fh, stp); |
4351 | if (status) | |
1da177e4 | 4352 | goto out; |
fe0750e5 | 4353 | if (stp->st_stateowner->so_is_open_owner |
dad1c067 | 4354 | && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
1da177e4 | 4355 | goto out; |
a4455be0 BF |
4356 | status = nfs4_check_openmode(stp, flags); |
4357 | if (status) | |
1da177e4 | 4358 | goto out; |
f9d7562f | 4359 | if (filpp) { |
11b9164a TM |
4360 | struct nfs4_file *fp = stp->st_stid.sc_file; |
4361 | ||
f9d7562f | 4362 | if (flags & RD_STATE) |
11b9164a | 4363 | file = find_readable_file(fp); |
f9d7562f | 4364 | else |
11b9164a | 4365 | file = find_writeable_file(fp); |
f9d7562f | 4366 | } |
f7a4d872 BF |
4367 | break; |
4368 | default: | |
14bcab1a TM |
4369 | status = nfserr_bad_stateid; |
4370 | goto out; | |
1da177e4 LT |
4371 | } |
4372 | status = nfs_ok; | |
14bcab1a | 4373 | if (file) |
de18643d | 4374 | *filpp = file; |
1da177e4 | 4375 | out: |
fd911011 TM |
4376 | nfs4_put_stid(s); |
4377 | unlock_state: | |
14bcab1a | 4378 | nfs4_unlock_state(); |
1da177e4 LT |
4379 | return status; |
4380 | } | |
4381 | ||
e1ca12df | 4382 | static __be32 |
dcef0413 | 4383 | nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) |
e1ca12df | 4384 | { |
a1b8ff4c BF |
4385 | struct nfs4_lockowner *lo = lockowner(stp->st_stateowner); |
4386 | ||
11b9164a | 4387 | if (check_for_locks(stp->st_stid.sc_file, lo)) |
e1ca12df | 4388 | return nfserr_locks_held; |
5adfd885 | 4389 | release_lock_stateid(stp); |
e1ca12df BS |
4390 | return nfs_ok; |
4391 | } | |
4392 | ||
17456804 BS |
4393 | /* |
4394 | * Test if the stateid is valid | |
4395 | */ | |
4396 | __be32 | |
4397 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
4398 | struct nfsd4_test_stateid *test_stateid) | |
4399 | { | |
03cfb420 BS |
4400 | struct nfsd4_test_stateid_id *stateid; |
4401 | struct nfs4_client *cl = cstate->session->se_client; | |
4402 | ||
4403 | nfs4_lock_state(); | |
4404 | list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) | |
7df302f7 CL |
4405 | stateid->ts_id_status = |
4406 | nfsd4_validate_stateid(cl, &stateid->ts_id_stateid); | |
03cfb420 BS |
4407 | nfs4_unlock_state(); |
4408 | ||
17456804 BS |
4409 | return nfs_ok; |
4410 | } | |
4411 | ||
e1ca12df BS |
4412 | __be32 |
4413 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
4414 | struct nfsd4_free_stateid *free_stateid) | |
4415 | { | |
4416 | stateid_t *stateid = &free_stateid->fr_stateid; | |
2da1cec7 | 4417 | struct nfs4_stid *s; |
3bd64a5b | 4418 | struct nfs4_delegation *dp; |
38c2f4b1 | 4419 | struct nfs4_client *cl = cstate->session->se_client; |
2da1cec7 | 4420 | __be32 ret = nfserr_bad_stateid; |
e1ca12df BS |
4421 | |
4422 | nfs4_lock_state(); | |
1af71cc8 JL |
4423 | spin_lock(&cl->cl_lock); |
4424 | s = find_stateid_locked(cl, stateid); | |
2da1cec7 | 4425 | if (!s) |
1af71cc8 | 4426 | goto out_unlock; |
2da1cec7 BF |
4427 | switch (s->sc_type) { |
4428 | case NFS4_DELEG_STID: | |
e1ca12df | 4429 | ret = nfserr_locks_held; |
1af71cc8 | 4430 | break; |
2da1cec7 | 4431 | case NFS4_OPEN_STID: |
2da1cec7 BF |
4432 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); |
4433 | if (ret) | |
1af71cc8 JL |
4434 | break; |
4435 | ret = nfserr_locks_held; | |
f7a4d872 | 4436 | break; |
1af71cc8 JL |
4437 | case NFS4_LOCK_STID: |
4438 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); | |
4439 | if (ret) | |
4440 | break; | |
4441 | spin_unlock(&cl->cl_lock); | |
4442 | ret = nfsd4_free_lock_stateid(openlockstateid(s)); | |
4443 | goto out; | |
3bd64a5b BF |
4444 | case NFS4_REVOKED_DELEG_STID: |
4445 | dp = delegstateid(s); | |
2d4a532d JL |
4446 | list_del_init(&dp->dl_recall_lru); |
4447 | spin_unlock(&cl->cl_lock); | |
6011695d | 4448 | nfs4_put_stid(s); |
3bd64a5b | 4449 | ret = nfs_ok; |
1af71cc8 JL |
4450 | goto out; |
4451 | /* Default falls through and returns nfserr_bad_stateid */ | |
e1ca12df | 4452 | } |
1af71cc8 JL |
4453 | out_unlock: |
4454 | spin_unlock(&cl->cl_lock); | |
e1ca12df BS |
4455 | out: |
4456 | nfs4_unlock_state(); | |
4457 | return ret; | |
4458 | } | |
4459 | ||
4c4cd222 N |
4460 | static inline int |
4461 | setlkflg (int type) | |
4462 | { | |
4463 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
4464 | RD_STATE : WR_STATE; | |
4465 | } | |
1da177e4 | 4466 | |
dcef0413 | 4467 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
c0a5d93e BF |
4468 | { |
4469 | struct svc_fh *current_fh = &cstate->current_fh; | |
4470 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
4471 | __be32 status; | |
4472 | ||
c0a5d93e BF |
4473 | status = nfsd4_check_seqid(cstate, sop, seqid); |
4474 | if (status) | |
4475 | return status; | |
3bd64a5b BF |
4476 | if (stp->st_stid.sc_type == NFS4_CLOSED_STID |
4477 | || stp->st_stid.sc_type == NFS4_REVOKED_DELEG_STID) | |
f7a4d872 BF |
4478 | /* |
4479 | * "Closed" stateid's exist *only* to return | |
3bd64a5b BF |
4480 | * nfserr_replay_me from the previous step, and |
4481 | * revoked delegations are kept only for free_stateid. | |
f7a4d872 BF |
4482 | */ |
4483 | return nfserr_bad_stateid; | |
4484 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); | |
4485 | if (status) | |
4486 | return status; | |
4487 | return nfs4_check_fh(current_fh, stp); | |
c0a5d93e BF |
4488 | } |
4489 | ||
1da177e4 LT |
4490 | /* |
4491 | * Checks for sequence id mutating operations. | |
4492 | */ | |
b37ad28b | 4493 | static __be32 |
dd453dfd | 4494 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2288d0e3 | 4495 | stateid_t *stateid, char typemask, |
3320fef1 SK |
4496 | struct nfs4_ol_stateid **stpp, |
4497 | struct nfsd_net *nn) | |
1da177e4 | 4498 | { |
0836f587 | 4499 | __be32 status; |
38c2f4b1 | 4500 | struct nfs4_stid *s; |
e17f99b7 | 4501 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 4502 | |
8c10cbdb BH |
4503 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
4504 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 4505 | |
1da177e4 | 4506 | *stpp = NULL; |
2dd6e458 | 4507 | status = nfsd4_lookup_stateid(cstate, stateid, typemask, &s, nn); |
c0a5d93e BF |
4508 | if (status) |
4509 | return status; | |
e17f99b7 | 4510 | stp = openlockstateid(s); |
58fb12e6 | 4511 | nfsd4_cstate_assign_replay(cstate, stp->st_stateowner); |
1da177e4 | 4512 | |
e17f99b7 | 4513 | status = nfs4_seqid_op_checks(cstate, stateid, seqid, stp); |
fd911011 | 4514 | if (!status) |
e17f99b7 | 4515 | *stpp = stp; |
fd911011 TM |
4516 | else |
4517 | nfs4_put_stid(&stp->st_stid); | |
e17f99b7 | 4518 | return status; |
c0a5d93e | 4519 | } |
39325bd0 | 4520 | |
3320fef1 SK |
4521 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
4522 | stateid_t *stateid, struct nfs4_ol_stateid **stpp, struct nfsd_net *nn) | |
c0a5d93e BF |
4523 | { |
4524 | __be32 status; | |
4525 | struct nfs4_openowner *oo; | |
4cbfc9f7 | 4526 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4527 | |
c0a5d93e | 4528 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
4cbfc9f7 | 4529 | NFS4_OPEN_STID, &stp, nn); |
7a8711c9 BF |
4530 | if (status) |
4531 | return status; | |
4cbfc9f7 TM |
4532 | oo = openowner(stp->st_stateowner); |
4533 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { | |
4534 | nfs4_put_stid(&stp->st_stid); | |
3a4f98bb | 4535 | return nfserr_bad_stateid; |
4cbfc9f7 TM |
4536 | } |
4537 | *stpp = stp; | |
3a4f98bb | 4538 | return nfs_ok; |
1da177e4 LT |
4539 | } |
4540 | ||
b37ad28b | 4541 | __be32 |
ca364317 | 4542 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4543 | struct nfsd4_open_confirm *oc) |
1da177e4 | 4544 | { |
b37ad28b | 4545 | __be32 status; |
fe0750e5 | 4546 | struct nfs4_openowner *oo; |
dcef0413 | 4547 | struct nfs4_ol_stateid *stp; |
3320fef1 | 4548 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4549 | |
a6a9f18f AV |
4550 | dprintk("NFSD: nfsd4_open_confirm on file %pd\n", |
4551 | cstate->current_fh.fh_dentry); | |
1da177e4 | 4552 | |
ca364317 | 4553 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
4554 | if (status) |
4555 | return status; | |
1da177e4 LT |
4556 | |
4557 | nfs4_lock_state(); | |
4558 | ||
9072d5c6 | 4559 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 4560 | oc->oc_seqid, &oc->oc_req_stateid, |
3320fef1 | 4561 | NFS4_OPEN_STID, &stp, nn); |
9072d5c6 | 4562 | if (status) |
68b66e82 | 4563 | goto out; |
fe0750e5 | 4564 | oo = openowner(stp->st_stateowner); |
68b66e82 | 4565 | status = nfserr_bad_stateid; |
dad1c067 | 4566 | if (oo->oo_flags & NFS4_OO_CONFIRMED) |
2585fc79 | 4567 | goto put_stateid; |
dad1c067 | 4568 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
dcef0413 BF |
4569 | update_stateid(&stp->st_stid.sc_stateid); |
4570 | memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
8c10cbdb | 4571 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
dcef0413 | 4572 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); |
c7b9a459 | 4573 | |
2a4317c5 | 4574 | nfsd4_client_record_create(oo->oo_owner.so_client); |
68b66e82 | 4575 | status = nfs_ok; |
2585fc79 TM |
4576 | put_stateid: |
4577 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 4578 | out: |
9411b1d4 | 4579 | nfsd4_bump_seqid(cstate, status); |
58fb12e6 | 4580 | nfs4_unlock_state(); |
1da177e4 LT |
4581 | return status; |
4582 | } | |
4583 | ||
6409a5a6 | 4584 | static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) |
1da177e4 | 4585 | { |
82c5ff1b | 4586 | if (!test_access(access, stp)) |
6409a5a6 | 4587 | return; |
11b9164a | 4588 | nfs4_file_put_access(stp->st_stid.sc_file, access); |
82c5ff1b | 4589 | clear_access(access, stp); |
6409a5a6 | 4590 | } |
f197c271 | 4591 | |
6409a5a6 BF |
4592 | static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) |
4593 | { | |
4594 | switch (to_access) { | |
4595 | case NFS4_SHARE_ACCESS_READ: | |
4596 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); | |
4597 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
4598 | break; | |
4599 | case NFS4_SHARE_ACCESS_WRITE: | |
4600 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); | |
4601 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
4602 | break; | |
4603 | case NFS4_SHARE_ACCESS_BOTH: | |
4604 | break; | |
4605 | default: | |
063b0fb9 | 4606 | WARN_ON_ONCE(1); |
1da177e4 LT |
4607 | } |
4608 | } | |
4609 | ||
b37ad28b | 4610 | __be32 |
ca364317 BF |
4611 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
4612 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 4613 | struct nfsd4_open_downgrade *od) |
1da177e4 | 4614 | { |
b37ad28b | 4615 | __be32 status; |
dcef0413 | 4616 | struct nfs4_ol_stateid *stp; |
3320fef1 | 4617 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4618 | |
a6a9f18f AV |
4619 | dprintk("NFSD: nfsd4_open_downgrade on file %pd\n", |
4620 | cstate->current_fh.fh_dentry); | |
1da177e4 | 4621 | |
c30e92df | 4622 | /* We don't yet support WANT bits: */ |
2c8bd7e0 BH |
4623 | if (od->od_deleg_want) |
4624 | dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, | |
4625 | od->od_deleg_want); | |
1da177e4 LT |
4626 | |
4627 | nfs4_lock_state(); | |
c0a5d93e | 4628 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
3320fef1 | 4629 | &od->od_stateid, &stp, nn); |
9072d5c6 | 4630 | if (status) |
1da177e4 | 4631 | goto out; |
1da177e4 | 4632 | status = nfserr_inval; |
82c5ff1b | 4633 | if (!test_access(od->od_share_access, stp)) { |
c11c591f | 4634 | dprintk("NFSD: access not a subset of current bitmap: 0x%hhx, input access=%08x\n", |
1da177e4 | 4635 | stp->st_access_bmap, od->od_share_access); |
0667b1e9 | 4636 | goto put_stateid; |
1da177e4 | 4637 | } |
ce0fc43c | 4638 | if (!test_deny(od->od_share_deny, stp)) { |
c11c591f | 4639 | dprintk("NFSD: deny not a subset of current bitmap: 0x%hhx, input deny=%08x\n", |
1da177e4 | 4640 | stp->st_deny_bmap, od->od_share_deny); |
0667b1e9 | 4641 | goto put_stateid; |
1da177e4 | 4642 | } |
6409a5a6 | 4643 | nfs4_stateid_downgrade(stp, od->od_share_access); |
1da177e4 | 4644 | |
ce0fc43c | 4645 | reset_union_bmap_deny(od->od_share_deny, stp); |
1da177e4 | 4646 | |
dcef0413 BF |
4647 | update_stateid(&stp->st_stid.sc_stateid); |
4648 | memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 4649 | status = nfs_ok; |
0667b1e9 TM |
4650 | put_stateid: |
4651 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 4652 | out: |
9411b1d4 | 4653 | nfsd4_bump_seqid(cstate, status); |
58fb12e6 | 4654 | nfs4_unlock_state(); |
1da177e4 LT |
4655 | return status; |
4656 | } | |
4657 | ||
f7a4d872 BF |
4658 | static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) |
4659 | { | |
acf9295b | 4660 | struct nfs4_client *clp = s->st_stid.sc_client; |
acf9295b | 4661 | |
f7a4d872 | 4662 | s->st_stid.sc_type = NFS4_CLOSED_STID; |
acf9295b TM |
4663 | unhash_open_stateid(s); |
4664 | ||
d3134b10 | 4665 | if (clp->cl_minorversion) |
6011695d | 4666 | nfs4_put_stid(&s->st_stid); |
d3134b10 JL |
4667 | else |
4668 | move_to_close_lru(s, clp->net); | |
38c387b5 BF |
4669 | } |
4670 | ||
1da177e4 LT |
4671 | /* |
4672 | * nfs4_unlock_state() called after encode | |
4673 | */ | |
b37ad28b | 4674 | __be32 |
ca364317 | 4675 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4676 | struct nfsd4_close *close) |
1da177e4 | 4677 | { |
b37ad28b | 4678 | __be32 status; |
dcef0413 | 4679 | struct nfs4_ol_stateid *stp; |
3320fef1 SK |
4680 | struct net *net = SVC_NET(rqstp); |
4681 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 | 4682 | |
a6a9f18f AV |
4683 | dprintk("NFSD: nfsd4_close on file %pd\n", |
4684 | cstate->current_fh.fh_dentry); | |
1da177e4 LT |
4685 | |
4686 | nfs4_lock_state(); | |
f7a4d872 BF |
4687 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
4688 | &close->cl_stateid, | |
4689 | NFS4_OPEN_STID|NFS4_CLOSED_STID, | |
3320fef1 | 4690 | &stp, nn); |
9411b1d4 | 4691 | nfsd4_bump_seqid(cstate, status); |
9072d5c6 | 4692 | if (status) |
1da177e4 | 4693 | goto out; |
dcef0413 BF |
4694 | update_stateid(&stp->st_stid.sc_stateid); |
4695 | memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 4696 | |
f7a4d872 | 4697 | nfsd4_close_open_stateid(stp); |
8a0b589d TM |
4698 | |
4699 | /* put reference from nfs4_preprocess_seqid_op */ | |
4700 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 4701 | out: |
58fb12e6 | 4702 | nfs4_unlock_state(); |
1da177e4 LT |
4703 | return status; |
4704 | } | |
4705 | ||
b37ad28b | 4706 | __be32 |
ca364317 BF |
4707 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4708 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 4709 | { |
203a8c8e BF |
4710 | struct nfs4_delegation *dp; |
4711 | stateid_t *stateid = &dr->dr_stateid; | |
38c2f4b1 | 4712 | struct nfs4_stid *s; |
b37ad28b | 4713 | __be32 status; |
3320fef1 | 4714 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4715 | |
ca364317 | 4716 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e | 4717 | return status; |
1da177e4 LT |
4718 | |
4719 | nfs4_lock_state(); | |
2dd6e458 | 4720 | status = nfsd4_lookup_stateid(cstate, stateid, NFS4_DELEG_STID, &s, nn); |
38c2f4b1 | 4721 | if (status) |
203a8c8e | 4722 | goto out; |
38c2f4b1 | 4723 | dp = delegstateid(s); |
d5477a8d | 4724 | status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); |
203a8c8e | 4725 | if (status) |
fd911011 | 4726 | goto put_stateid; |
203a8c8e | 4727 | |
3bd64a5b | 4728 | destroy_delegation(dp); |
fd911011 TM |
4729 | put_stateid: |
4730 | nfs4_put_stid(&dp->dl_stid); | |
1da177e4 | 4731 | out: |
203a8c8e BF |
4732 | nfs4_unlock_state(); |
4733 | ||
1da177e4 LT |
4734 | return status; |
4735 | } | |
4736 | ||
4737 | ||
1da177e4 | 4738 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) |
1da177e4 | 4739 | |
87df4de8 BH |
4740 | static inline u64 |
4741 | end_offset(u64 start, u64 len) | |
4742 | { | |
4743 | u64 end; | |
4744 | ||
4745 | end = start + len; | |
4746 | return end >= start ? end: NFS4_MAX_UINT64; | |
4747 | } | |
4748 | ||
4749 | /* last octet in a range */ | |
4750 | static inline u64 | |
4751 | last_byte_offset(u64 start, u64 len) | |
4752 | { | |
4753 | u64 end; | |
4754 | ||
063b0fb9 | 4755 | WARN_ON_ONCE(!len); |
87df4de8 BH |
4756 | end = start + len; |
4757 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
4758 | } | |
4759 | ||
1da177e4 LT |
4760 | /* |
4761 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
4762 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
4763 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
4764 | * locking, this prevents us from being completely protocol-compliant. The | |
4765 | * real solution to this problem is to start using unsigned file offsets in | |
4766 | * the VFS, but this is a very deep change! | |
4767 | */ | |
4768 | static inline void | |
4769 | nfs4_transform_lock_offset(struct file_lock *lock) | |
4770 | { | |
4771 | if (lock->fl_start < 0) | |
4772 | lock->fl_start = OFFSET_MAX; | |
4773 | if (lock->fl_end < 0) | |
4774 | lock->fl_end = OFFSET_MAX; | |
4775 | } | |
4776 | ||
d5b9026a N |
4777 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
4778 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 4779 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 4780 | }; |
1da177e4 LT |
4781 | |
4782 | static inline void | |
4783 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
4784 | { | |
fe0750e5 | 4785 | struct nfs4_lockowner *lo; |
1da177e4 | 4786 | |
d5b9026a | 4787 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 BF |
4788 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
4789 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, | |
4790 | lo->lo_owner.so_owner.len, GFP_KERNEL); | |
7c13f344 BF |
4791 | if (!deny->ld_owner.data) |
4792 | /* We just don't care that much */ | |
4793 | goto nevermind; | |
fe0750e5 BF |
4794 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
4795 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; | |
d5b9026a | 4796 | } else { |
7c13f344 BF |
4797 | nevermind: |
4798 | deny->ld_owner.len = 0; | |
4799 | deny->ld_owner.data = NULL; | |
d5b9026a N |
4800 | deny->ld_clientid.cl_boot = 0; |
4801 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
4802 | } |
4803 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
4804 | deny->ld_length = NFS4_MAX_UINT64; |
4805 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
4806 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
4807 | deny->ld_type = NFS4_READ_LT; | |
4808 | if (fl->fl_type != F_RDLCK) | |
4809 | deny->ld_type = NFS4_WRITE_LT; | |
4810 | } | |
4811 | ||
fe0750e5 | 4812 | static struct nfs4_lockowner * |
c58c6610 | 4813 | find_lockowner_str_locked(clientid_t *clid, struct xdr_netobj *owner, |
d4f0489f | 4814 | struct nfs4_client *clp) |
1da177e4 | 4815 | { |
d4f0489f | 4816 | unsigned int strhashval = ownerstr_hashval(owner); |
b3c32bcd | 4817 | struct nfs4_stateowner *so; |
1da177e4 | 4818 | |
d4f0489f TM |
4819 | list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[strhashval], |
4820 | so_strhash) { | |
b3c32bcd TM |
4821 | if (so->so_is_open_owner) |
4822 | continue; | |
d4f0489f | 4823 | if (!same_owner_str(so, owner)) |
b3c32bcd | 4824 | continue; |
5db1c03f | 4825 | atomic_inc(&so->so_count); |
b3c32bcd | 4826 | return lockowner(so); |
1da177e4 LT |
4827 | } |
4828 | return NULL; | |
4829 | } | |
4830 | ||
c58c6610 TM |
4831 | static struct nfs4_lockowner * |
4832 | find_lockowner_str(clientid_t *clid, struct xdr_netobj *owner, | |
d4f0489f | 4833 | struct nfs4_client *clp) |
c58c6610 TM |
4834 | { |
4835 | struct nfs4_lockowner *lo; | |
4836 | ||
d4f0489f TM |
4837 | spin_lock(&clp->cl_lock); |
4838 | lo = find_lockowner_str_locked(clid, owner, clp); | |
4839 | spin_unlock(&clp->cl_lock); | |
c58c6610 TM |
4840 | return lo; |
4841 | } | |
4842 | ||
8f4b54c5 JL |
4843 | static void nfs4_unhash_lockowner(struct nfs4_stateowner *sop) |
4844 | { | |
d4f0489f | 4845 | struct nfs4_client *clp = sop->so_client; |
c58c6610 | 4846 | |
d4f0489f | 4847 | spin_lock(&clp->cl_lock); |
c58c6610 | 4848 | unhash_lockowner_locked(lockowner(sop)); |
d4f0489f | 4849 | spin_unlock(&clp->cl_lock); |
8f4b54c5 JL |
4850 | } |
4851 | ||
6b180f0b JL |
4852 | static void nfs4_free_lockowner(struct nfs4_stateowner *sop) |
4853 | { | |
4854 | struct nfs4_lockowner *lo = lockowner(sop); | |
4855 | ||
4856 | kmem_cache_free(lockowner_slab, lo); | |
4857 | } | |
4858 | ||
4859 | static const struct nfs4_stateowner_operations lockowner_ops = { | |
8f4b54c5 JL |
4860 | .so_unhash = nfs4_unhash_lockowner, |
4861 | .so_free = nfs4_free_lockowner, | |
6b180f0b JL |
4862 | }; |
4863 | ||
1da177e4 LT |
4864 | /* |
4865 | * Alloc a lock owner structure. | |
4866 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 4867 | * occurred. |
1da177e4 | 4868 | * |
16bfdaaf | 4869 | * strhashval = ownerstr_hashval |
1da177e4 | 4870 | */ |
fe0750e5 | 4871 | static struct nfs4_lockowner * |
c58c6610 TM |
4872 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, |
4873 | struct nfs4_ol_stateid *open_stp, | |
4874 | struct nfsd4_lock *lock) | |
4875 | { | |
c58c6610 | 4876 | struct nfs4_lockowner *lo, *ret; |
1da177e4 | 4877 | |
fe0750e5 BF |
4878 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
4879 | if (!lo) | |
1da177e4 | 4880 | return NULL; |
fe0750e5 BF |
4881 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
4882 | lo->lo_owner.so_is_open_owner = 0; | |
5db1c03f | 4883 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid; |
6b180f0b | 4884 | lo->lo_owner.so_ops = &lockowner_ops; |
d4f0489f | 4885 | spin_lock(&clp->cl_lock); |
c58c6610 | 4886 | ret = find_lockowner_str_locked(&clp->cl_clientid, |
d4f0489f | 4887 | &lock->lk_new_owner, clp); |
c58c6610 TM |
4888 | if (ret == NULL) { |
4889 | list_add(&lo->lo_owner.so_strhash, | |
d4f0489f | 4890 | &clp->cl_ownerstr_hashtbl[strhashval]); |
c58c6610 TM |
4891 | ret = lo; |
4892 | } else | |
4893 | nfs4_free_lockowner(&lo->lo_owner); | |
d4f0489f | 4894 | spin_unlock(&clp->cl_lock); |
fe0750e5 | 4895 | return lo; |
1da177e4 LT |
4896 | } |
4897 | ||
356a95ec JL |
4898 | static void |
4899 | init_lock_stateid(struct nfs4_ol_stateid *stp, struct nfs4_lockowner *lo, | |
4900 | struct nfs4_file *fp, struct inode *inode, | |
4901 | struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 4902 | { |
d3b313a4 | 4903 | struct nfs4_client *clp = lo->lo_owner.so_client; |
1da177e4 | 4904 | |
356a95ec JL |
4905 | lockdep_assert_held(&clp->cl_lock); |
4906 | ||
3d0fabd5 | 4907 | atomic_inc(&stp->st_stid.sc_count); |
3abdb607 | 4908 | stp->st_stid.sc_type = NFS4_LOCK_STID; |
fe0750e5 | 4909 | stp->st_stateowner = &lo->lo_owner; |
e4f1dd7f | 4910 | atomic_inc(&lo->lo_owner.so_count); |
13cd2184 | 4911 | get_nfs4_file(fp); |
11b9164a | 4912 | stp->st_stid.sc_file = fp; |
b49e084d | 4913 | stp->st_stid.sc_free = nfs4_free_lock_stateid; |
0997b173 | 4914 | stp->st_access_bmap = 0; |
1da177e4 | 4915 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 4916 | stp->st_openstp = open_stp; |
3c87b9b7 | 4917 | list_add(&stp->st_locks, &open_stp->st_locks); |
1c755dc1 | 4918 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
1d31a253 TM |
4919 | spin_lock(&fp->fi_lock); |
4920 | list_add(&stp->st_perfile, &fp->fi_stateids); | |
4921 | spin_unlock(&fp->fi_lock); | |
1da177e4 LT |
4922 | } |
4923 | ||
c53530da JL |
4924 | static struct nfs4_ol_stateid * |
4925 | find_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp) | |
4926 | { | |
4927 | struct nfs4_ol_stateid *lst; | |
356a95ec JL |
4928 | struct nfs4_client *clp = lo->lo_owner.so_client; |
4929 | ||
4930 | lockdep_assert_held(&clp->cl_lock); | |
c53530da JL |
4931 | |
4932 | list_for_each_entry(lst, &lo->lo_owner.so_stateids, st_perstateowner) { | |
3d0fabd5 TM |
4933 | if (lst->st_stid.sc_file == fp) { |
4934 | atomic_inc(&lst->st_stid.sc_count); | |
c53530da | 4935 | return lst; |
3d0fabd5 | 4936 | } |
c53530da JL |
4937 | } |
4938 | return NULL; | |
4939 | } | |
4940 | ||
356a95ec JL |
4941 | static struct nfs4_ol_stateid * |
4942 | find_or_create_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fi, | |
4943 | struct inode *inode, struct nfs4_ol_stateid *ost, | |
4944 | bool *new) | |
4945 | { | |
4946 | struct nfs4_stid *ns = NULL; | |
4947 | struct nfs4_ol_stateid *lst; | |
4948 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); | |
4949 | struct nfs4_client *clp = oo->oo_owner.so_client; | |
4950 | ||
4951 | spin_lock(&clp->cl_lock); | |
4952 | lst = find_lock_stateid(lo, fi); | |
4953 | if (lst == NULL) { | |
4954 | spin_unlock(&clp->cl_lock); | |
4955 | ns = nfs4_alloc_stid(clp, stateid_slab); | |
4956 | if (ns == NULL) | |
4957 | return NULL; | |
4958 | ||
4959 | spin_lock(&clp->cl_lock); | |
4960 | lst = find_lock_stateid(lo, fi); | |
4961 | if (likely(!lst)) { | |
4962 | lst = openlockstateid(ns); | |
4963 | init_lock_stateid(lst, lo, fi, inode, ost); | |
4964 | ns = NULL; | |
4965 | *new = true; | |
4966 | } | |
4967 | } | |
4968 | spin_unlock(&clp->cl_lock); | |
4969 | if (ns) | |
4970 | nfs4_put_stid(ns); | |
4971 | return lst; | |
4972 | } | |
c53530da | 4973 | |
fd39ca9a | 4974 | static int |
1da177e4 LT |
4975 | check_lock_length(u64 offset, u64 length) |
4976 | { | |
87df4de8 | 4977 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
4978 | LOFF_OVERFLOW(offset, length))); |
4979 | } | |
4980 | ||
dcef0413 | 4981 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 | 4982 | { |
11b9164a | 4983 | struct nfs4_file *fp = lock_stp->st_stid.sc_file; |
0997b173 | 4984 | |
7214e860 JL |
4985 | lockdep_assert_held(&fp->fi_lock); |
4986 | ||
82c5ff1b | 4987 | if (test_access(access, lock_stp)) |
0997b173 | 4988 | return; |
12659651 | 4989 | __nfs4_file_get_access(fp, access); |
82c5ff1b | 4990 | set_access(access, lock_stp); |
0997b173 BF |
4991 | } |
4992 | ||
356a95ec JL |
4993 | static __be32 |
4994 | lookup_or_create_lock_state(struct nfsd4_compound_state *cstate, | |
4995 | struct nfs4_ol_stateid *ost, | |
4996 | struct nfsd4_lock *lock, | |
4997 | struct nfs4_ol_stateid **lst, bool *new) | |
64a284d0 | 4998 | { |
5db1c03f | 4999 | __be32 status; |
11b9164a | 5000 | struct nfs4_file *fi = ost->st_stid.sc_file; |
64a284d0 BF |
5001 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); |
5002 | struct nfs4_client *cl = oo->oo_owner.so_client; | |
f9c00c3a | 5003 | struct inode *inode = cstate->current_fh.fh_dentry->d_inode; |
64a284d0 BF |
5004 | struct nfs4_lockowner *lo; |
5005 | unsigned int strhashval; | |
5006 | ||
d4f0489f | 5007 | lo = find_lockowner_str(&cl->cl_clientid, &lock->v.new.owner, cl); |
c53530da | 5008 | if (!lo) { |
d4f0489f | 5009 | strhashval = ownerstr_hashval(&lock->v.new.owner); |
c53530da JL |
5010 | lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); |
5011 | if (lo == NULL) | |
5012 | return nfserr_jukebox; | |
5013 | } else { | |
5014 | /* with an existing lockowner, seqids must be the same */ | |
5db1c03f | 5015 | status = nfserr_bad_seqid; |
c53530da JL |
5016 | if (!cstate->minorversion && |
5017 | lock->lk_new_lock_seqid != lo->lo_owner.so_seqid) | |
5db1c03f | 5018 | goto out; |
64a284d0 | 5019 | } |
c53530da | 5020 | |
356a95ec | 5021 | *lst = find_or_create_lock_stateid(lo, fi, inode, ost, new); |
64a284d0 | 5022 | if (*lst == NULL) { |
5db1c03f JL |
5023 | status = nfserr_jukebox; |
5024 | goto out; | |
64a284d0 | 5025 | } |
5db1c03f JL |
5026 | status = nfs_ok; |
5027 | out: | |
5028 | nfs4_put_stateowner(&lo->lo_owner); | |
5029 | return status; | |
64a284d0 BF |
5030 | } |
5031 | ||
1da177e4 LT |
5032 | /* |
5033 | * LOCK operation | |
5034 | */ | |
b37ad28b | 5035 | __be32 |
ca364317 | 5036 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 5037 | struct nfsd4_lock *lock) |
1da177e4 | 5038 | { |
fe0750e5 BF |
5039 | struct nfs4_openowner *open_sop = NULL; |
5040 | struct nfs4_lockowner *lock_sop = NULL; | |
3d0fabd5 | 5041 | struct nfs4_ol_stateid *lock_stp = NULL; |
0667b1e9 | 5042 | struct nfs4_ol_stateid *open_stp = NULL; |
7214e860 | 5043 | struct nfs4_file *fp; |
7d947842 | 5044 | struct file *filp = NULL; |
21179d81 JL |
5045 | struct file_lock *file_lock = NULL; |
5046 | struct file_lock *conflock = NULL; | |
b37ad28b | 5047 | __be32 status = 0; |
b34f27aa | 5048 | int lkflg; |
b8dd7b9a | 5049 | int err; |
5db1c03f | 5050 | bool new = false; |
3320fef1 SK |
5051 | struct net *net = SVC_NET(rqstp); |
5052 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 LT |
5053 | |
5054 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
5055 | (long long) lock->lk_offset, | |
5056 | (long long) lock->lk_length); | |
5057 | ||
1da177e4 LT |
5058 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
5059 | return nfserr_inval; | |
5060 | ||
ca364317 | 5061 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 5062 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
5063 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
5064 | return status; | |
5065 | } | |
5066 | ||
1da177e4 LT |
5067 | nfs4_lock_state(); |
5068 | ||
5069 | if (lock->lk_is_new) { | |
684e5638 BF |
5070 | if (nfsd4_has_session(cstate)) |
5071 | /* See rfc 5661 18.10.3: given clientid is ignored: */ | |
5072 | memcpy(&lock->v.new.clientid, | |
5073 | &cstate->session->se_client->cl_clientid, | |
5074 | sizeof(clientid_t)); | |
5075 | ||
1da177e4 | 5076 | status = nfserr_stale_clientid; |
2c142baa | 5077 | if (STALE_CLIENTID(&lock->lk_new_clientid, nn)) |
1da177e4 | 5078 | goto out; |
1da177e4 | 5079 | |
1da177e4 | 5080 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 5081 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
5082 | lock->lk_new_open_seqid, |
5083 | &lock->lk_new_open_stateid, | |
3320fef1 | 5084 | &open_stp, nn); |
37515177 | 5085 | if (status) |
1da177e4 | 5086 | goto out; |
fe0750e5 | 5087 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 5088 | status = nfserr_bad_stateid; |
684e5638 | 5089 | if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
b34f27aa BF |
5090 | &lock->v.new.clientid)) |
5091 | goto out; | |
64a284d0 | 5092 | status = lookup_or_create_lock_state(cstate, open_stp, lock, |
5db1c03f | 5093 | &lock_stp, &new); |
3d0fabd5 | 5094 | } else { |
dd453dfd | 5095 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
5096 | lock->lk_old_lock_seqid, |
5097 | &lock->lk_old_lock_stateid, | |
3320fef1 | 5098 | NFS4_LOCK_STID, &lock_stp, nn); |
3d0fabd5 | 5099 | } |
e1aaa891 BF |
5100 | if (status) |
5101 | goto out; | |
64a284d0 | 5102 | lock_sop = lockowner(lock_stp->st_stateowner); |
1da177e4 | 5103 | |
b34f27aa BF |
5104 | lkflg = setlkflg(lock->lk_type); |
5105 | status = nfs4_check_openmode(lock_stp, lkflg); | |
5106 | if (status) | |
5107 | goto out; | |
5108 | ||
0dd395dc | 5109 | status = nfserr_grace; |
3320fef1 | 5110 | if (locks_in_grace(net) && !lock->lk_reclaim) |
0dd395dc N |
5111 | goto out; |
5112 | status = nfserr_no_grace; | |
3320fef1 | 5113 | if (!locks_in_grace(net) && lock->lk_reclaim) |
0dd395dc N |
5114 | goto out; |
5115 | ||
21179d81 JL |
5116 | file_lock = locks_alloc_lock(); |
5117 | if (!file_lock) { | |
5118 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
5119 | status = nfserr_jukebox; | |
5120 | goto out; | |
5121 | } | |
5122 | ||
11b9164a | 5123 | fp = lock_stp->st_stid.sc_file; |
21179d81 | 5124 | locks_init_lock(file_lock); |
1da177e4 LT |
5125 | switch (lock->lk_type) { |
5126 | case NFS4_READ_LT: | |
5127 | case NFS4_READW_LT: | |
7214e860 JL |
5128 | spin_lock(&fp->fi_lock); |
5129 | filp = find_readable_file_locked(fp); | |
0997b173 BF |
5130 | if (filp) |
5131 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
7214e860 | 5132 | spin_unlock(&fp->fi_lock); |
21179d81 | 5133 | file_lock->fl_type = F_RDLCK; |
529d7b2a | 5134 | break; |
1da177e4 LT |
5135 | case NFS4_WRITE_LT: |
5136 | case NFS4_WRITEW_LT: | |
7214e860 JL |
5137 | spin_lock(&fp->fi_lock); |
5138 | filp = find_writeable_file_locked(fp); | |
0997b173 BF |
5139 | if (filp) |
5140 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
7214e860 | 5141 | spin_unlock(&fp->fi_lock); |
21179d81 | 5142 | file_lock->fl_type = F_WRLCK; |
529d7b2a | 5143 | break; |
1da177e4 LT |
5144 | default: |
5145 | status = nfserr_inval; | |
5146 | goto out; | |
5147 | } | |
f9d7562f BF |
5148 | if (!filp) { |
5149 | status = nfserr_openmode; | |
5150 | goto out; | |
5151 | } | |
21179d81 JL |
5152 | file_lock->fl_owner = (fl_owner_t)lock_sop; |
5153 | file_lock->fl_pid = current->tgid; | |
5154 | file_lock->fl_file = filp; | |
5155 | file_lock->fl_flags = FL_POSIX; | |
5156 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
5157 | file_lock->fl_start = lock->lk_offset; | |
5158 | file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); | |
5159 | nfs4_transform_lock_offset(file_lock); | |
5160 | ||
5161 | conflock = locks_alloc_lock(); | |
5162 | if (!conflock) { | |
5163 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
5164 | status = nfserr_jukebox; | |
5165 | goto out; | |
5166 | } | |
1da177e4 | 5167 | |
21179d81 | 5168 | err = vfs_lock_file(filp, F_SETLK, file_lock, conflock); |
b8dd7b9a | 5169 | switch (-err) { |
1da177e4 | 5170 | case 0: /* success! */ |
dcef0413 BF |
5171 | update_stateid(&lock_stp->st_stid.sc_stateid); |
5172 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, | |
1da177e4 | 5173 | sizeof(stateid_t)); |
b8dd7b9a | 5174 | status = 0; |
eb76b3fd AA |
5175 | break; |
5176 | case (EAGAIN): /* conflock holds conflicting lock */ | |
5177 | status = nfserr_denied; | |
5178 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
21179d81 | 5179 | nfs4_set_lock_denied(conflock, &lock->lk_denied); |
eb76b3fd | 5180 | break; |
1da177e4 LT |
5181 | case (EDEADLK): |
5182 | status = nfserr_deadlock; | |
eb76b3fd | 5183 | break; |
3e772463 | 5184 | default: |
fd85b817 | 5185 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 5186 | status = nfserrno(err); |
eb76b3fd | 5187 | break; |
1da177e4 | 5188 | } |
1da177e4 | 5189 | out: |
de18643d TM |
5190 | if (filp) |
5191 | fput(filp); | |
5db1c03f JL |
5192 | if (lock_stp) { |
5193 | /* Bump seqid manually if the 4.0 replay owner is openowner */ | |
5194 | if (cstate->replay_owner && | |
5195 | cstate->replay_owner != &lock_sop->lo_owner && | |
5196 | seqid_mutating_err(ntohl(status))) | |
5197 | lock_sop->lo_owner.so_seqid++; | |
5198 | ||
5199 | /* | |
5200 | * If this is a new, never-before-used stateid, and we are | |
5201 | * returning an error, then just go ahead and release it. | |
5202 | */ | |
5203 | if (status && new) | |
5204 | release_lock_stateid(lock_stp); | |
5205 | ||
3d0fabd5 | 5206 | nfs4_put_stid(&lock_stp->st_stid); |
5db1c03f | 5207 | } |
0667b1e9 TM |
5208 | if (open_stp) |
5209 | nfs4_put_stid(&open_stp->st_stid); | |
9411b1d4 | 5210 | nfsd4_bump_seqid(cstate, status); |
58fb12e6 | 5211 | nfs4_unlock_state(); |
21179d81 JL |
5212 | if (file_lock) |
5213 | locks_free_lock(file_lock); | |
5214 | if (conflock) | |
5215 | locks_free_lock(conflock); | |
1da177e4 LT |
5216 | return status; |
5217 | } | |
5218 | ||
55ef1274 BF |
5219 | /* |
5220 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
5221 | * so we do a temporary open here just to get an open file to pass to | |
5222 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
5223 | * inode operation.) | |
5224 | */ | |
04da6e9d | 5225 | static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) |
55ef1274 BF |
5226 | { |
5227 | struct file *file; | |
04da6e9d AV |
5228 | __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); |
5229 | if (!err) { | |
5230 | err = nfserrno(vfs_test_lock(file, lock)); | |
5231 | nfsd_close(file); | |
5232 | } | |
55ef1274 BF |
5233 | return err; |
5234 | } | |
5235 | ||
1da177e4 LT |
5236 | /* |
5237 | * LOCKT operation | |
5238 | */ | |
b37ad28b | 5239 | __be32 |
ca364317 BF |
5240 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
5241 | struct nfsd4_lockt *lockt) | |
1da177e4 | 5242 | { |
21179d81 | 5243 | struct file_lock *file_lock = NULL; |
5db1c03f | 5244 | struct nfs4_lockowner *lo = NULL; |
b37ad28b | 5245 | __be32 status; |
7f2210fa | 5246 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 5247 | |
5ccb0066 | 5248 | if (locks_in_grace(SVC_NET(rqstp))) |
1da177e4 LT |
5249 | return nfserr_grace; |
5250 | ||
5251 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
5252 | return nfserr_inval; | |
5253 | ||
1da177e4 LT |
5254 | nfs4_lock_state(); |
5255 | ||
9b2ef62b | 5256 | if (!nfsd4_has_session(cstate)) { |
4b24ca7d | 5257 | status = lookup_clientid(&lockt->lt_clientid, cstate, nn); |
9b2ef62b BF |
5258 | if (status) |
5259 | goto out; | |
5260 | } | |
1da177e4 | 5261 | |
75c096f7 | 5262 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 5263 | goto out; |
1da177e4 | 5264 | |
21179d81 JL |
5265 | file_lock = locks_alloc_lock(); |
5266 | if (!file_lock) { | |
5267 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
5268 | status = nfserr_jukebox; | |
5269 | goto out; | |
5270 | } | |
5271 | locks_init_lock(file_lock); | |
1da177e4 LT |
5272 | switch (lockt->lt_type) { |
5273 | case NFS4_READ_LT: | |
5274 | case NFS4_READW_LT: | |
21179d81 | 5275 | file_lock->fl_type = F_RDLCK; |
1da177e4 LT |
5276 | break; |
5277 | case NFS4_WRITE_LT: | |
5278 | case NFS4_WRITEW_LT: | |
21179d81 | 5279 | file_lock->fl_type = F_WRLCK; |
1da177e4 LT |
5280 | break; |
5281 | default: | |
2fdada03 | 5282 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
5283 | status = nfserr_inval; |
5284 | goto out; | |
5285 | } | |
5286 | ||
d4f0489f TM |
5287 | lo = find_lockowner_str(&lockt->lt_clientid, &lockt->lt_owner, |
5288 | cstate->clp); | |
fe0750e5 | 5289 | if (lo) |
21179d81 JL |
5290 | file_lock->fl_owner = (fl_owner_t)lo; |
5291 | file_lock->fl_pid = current->tgid; | |
5292 | file_lock->fl_flags = FL_POSIX; | |
1da177e4 | 5293 | |
21179d81 JL |
5294 | file_lock->fl_start = lockt->lt_offset; |
5295 | file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); | |
1da177e4 | 5296 | |
21179d81 | 5297 | nfs4_transform_lock_offset(file_lock); |
1da177e4 | 5298 | |
21179d81 | 5299 | status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock); |
04da6e9d | 5300 | if (status) |
fd85b817 | 5301 | goto out; |
04da6e9d | 5302 | |
21179d81 | 5303 | if (file_lock->fl_type != F_UNLCK) { |
1da177e4 | 5304 | status = nfserr_denied; |
21179d81 | 5305 | nfs4_set_lock_denied(file_lock, &lockt->lt_denied); |
1da177e4 LT |
5306 | } |
5307 | out: | |
5db1c03f JL |
5308 | if (lo) |
5309 | nfs4_put_stateowner(&lo->lo_owner); | |
1da177e4 | 5310 | nfs4_unlock_state(); |
21179d81 JL |
5311 | if (file_lock) |
5312 | locks_free_lock(file_lock); | |
1da177e4 LT |
5313 | return status; |
5314 | } | |
5315 | ||
b37ad28b | 5316 | __be32 |
ca364317 | 5317 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 5318 | struct nfsd4_locku *locku) |
1da177e4 | 5319 | { |
dcef0413 | 5320 | struct nfs4_ol_stateid *stp; |
1da177e4 | 5321 | struct file *filp = NULL; |
21179d81 | 5322 | struct file_lock *file_lock = NULL; |
b37ad28b | 5323 | __be32 status; |
b8dd7b9a | 5324 | int err; |
3320fef1 SK |
5325 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
5326 | ||
1da177e4 LT |
5327 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", |
5328 | (long long) locku->lu_offset, | |
5329 | (long long) locku->lu_length); | |
5330 | ||
5331 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
5332 | return nfserr_inval; | |
5333 | ||
5334 | nfs4_lock_state(); | |
5335 | ||
9072d5c6 | 5336 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
3320fef1 SK |
5337 | &locku->lu_stateid, NFS4_LOCK_STID, |
5338 | &stp, nn); | |
9072d5c6 | 5339 | if (status) |
1da177e4 | 5340 | goto out; |
11b9164a | 5341 | filp = find_any_file(stp->st_stid.sc_file); |
f9d7562f BF |
5342 | if (!filp) { |
5343 | status = nfserr_lock_range; | |
858cc573 | 5344 | goto put_stateid; |
f9d7562f | 5345 | } |
21179d81 JL |
5346 | file_lock = locks_alloc_lock(); |
5347 | if (!file_lock) { | |
5348 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
5349 | status = nfserr_jukebox; | |
de18643d | 5350 | goto fput; |
21179d81 JL |
5351 | } |
5352 | locks_init_lock(file_lock); | |
5353 | file_lock->fl_type = F_UNLCK; | |
0a262ffb | 5354 | file_lock->fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); |
21179d81 JL |
5355 | file_lock->fl_pid = current->tgid; |
5356 | file_lock->fl_file = filp; | |
5357 | file_lock->fl_flags = FL_POSIX; | |
5358 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
5359 | file_lock->fl_start = locku->lu_offset; | |
5360 | ||
5361 | file_lock->fl_end = last_byte_offset(locku->lu_offset, | |
5362 | locku->lu_length); | |
5363 | nfs4_transform_lock_offset(file_lock); | |
1da177e4 | 5364 | |
21179d81 | 5365 | err = vfs_lock_file(filp, F_SETLK, file_lock, NULL); |
b8dd7b9a | 5366 | if (err) { |
fd85b817 | 5367 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
5368 | goto out_nfserr; |
5369 | } | |
dcef0413 BF |
5370 | update_stateid(&stp->st_stid.sc_stateid); |
5371 | memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
de18643d TM |
5372 | fput: |
5373 | fput(filp); | |
858cc573 TM |
5374 | put_stateid: |
5375 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 5376 | out: |
9411b1d4 | 5377 | nfsd4_bump_seqid(cstate, status); |
58fb12e6 | 5378 | nfs4_unlock_state(); |
21179d81 JL |
5379 | if (file_lock) |
5380 | locks_free_lock(file_lock); | |
1da177e4 LT |
5381 | return status; |
5382 | ||
5383 | out_nfserr: | |
b8dd7b9a | 5384 | status = nfserrno(err); |
de18643d | 5385 | goto fput; |
1da177e4 LT |
5386 | } |
5387 | ||
5388 | /* | |
5389 | * returns | |
f9c00c3a JL |
5390 | * true: locks held by lockowner |
5391 | * false: no locks held by lockowner | |
1da177e4 | 5392 | */ |
f9c00c3a JL |
5393 | static bool |
5394 | check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner) | |
1da177e4 LT |
5395 | { |
5396 | struct file_lock **flpp; | |
f9c00c3a JL |
5397 | int status = false; |
5398 | struct file *filp = find_any_file(fp); | |
5399 | struct inode *inode; | |
5400 | ||
5401 | if (!filp) { | |
5402 | /* Any valid lock stateid should have some sort of access */ | |
5403 | WARN_ON_ONCE(1); | |
5404 | return status; | |
5405 | } | |
5406 | ||
5407 | inode = file_inode(filp); | |
1da177e4 | 5408 | |
1c8c601a | 5409 | spin_lock(&inode->i_lock); |
1da177e4 | 5410 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
796dadfd | 5411 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
f9c00c3a JL |
5412 | status = true; |
5413 | break; | |
796dadfd | 5414 | } |
1da177e4 | 5415 | } |
1c8c601a | 5416 | spin_unlock(&inode->i_lock); |
f9c00c3a | 5417 | fput(filp); |
1da177e4 LT |
5418 | return status; |
5419 | } | |
5420 | ||
b37ad28b | 5421 | __be32 |
b591480b BF |
5422 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
5423 | struct nfsd4_compound_state *cstate, | |
5424 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
5425 | { |
5426 | clientid_t *clid = &rlockowner->rl_clientid; | |
882e9d25 JL |
5427 | struct nfs4_stateowner *sop; |
5428 | struct nfs4_lockowner *lo = NULL; | |
dcef0413 | 5429 | struct nfs4_ol_stateid *stp; |
1da177e4 | 5430 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
d4f0489f | 5431 | unsigned int hashval = ownerstr_hashval(owner); |
b37ad28b | 5432 | __be32 status; |
7f2210fa | 5433 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
c58c6610 | 5434 | struct nfs4_client *clp; |
1da177e4 LT |
5435 | |
5436 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
5437 | clid->cl_boot, clid->cl_id); | |
5438 | ||
1da177e4 LT |
5439 | nfs4_lock_state(); |
5440 | ||
4b24ca7d | 5441 | status = lookup_clientid(clid, cstate, nn); |
9b2ef62b BF |
5442 | if (status) |
5443 | goto out; | |
5444 | ||
d4f0489f | 5445 | clp = cstate->clp; |
fd44907c | 5446 | /* Find the matching lock stateowner */ |
d4f0489f | 5447 | spin_lock(&clp->cl_lock); |
882e9d25 | 5448 | list_for_each_entry(sop, &clp->cl_ownerstr_hashtbl[hashval], |
d4f0489f | 5449 | so_strhash) { |
fd44907c | 5450 | |
882e9d25 JL |
5451 | if (sop->so_is_open_owner || !same_owner_str(sop, owner)) |
5452 | continue; | |
fd44907c | 5453 | |
882e9d25 JL |
5454 | /* see if there are still any locks associated with it */ |
5455 | lo = lockowner(sop); | |
5456 | list_for_each_entry(stp, &sop->so_stateids, st_perstateowner) { | |
5457 | if (check_for_locks(stp->st_stid.sc_file, lo)) { | |
5458 | status = nfserr_locks_held; | |
5459 | spin_unlock(&clp->cl_lock); | |
5460 | goto out; | |
5461 | } | |
5adfd885 | 5462 | } |
882e9d25 JL |
5463 | |
5464 | atomic_inc(&sop->so_count); | |
5465 | break; | |
1da177e4 | 5466 | } |
c58c6610 | 5467 | spin_unlock(&clp->cl_lock); |
882e9d25 JL |
5468 | if (lo) |
5469 | release_lockowner(lo); | |
1da177e4 LT |
5470 | out: |
5471 | nfs4_unlock_state(); | |
5472 | return status; | |
5473 | } | |
5474 | ||
5475 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 5476 | alloc_reclaim(void) |
1da177e4 | 5477 | { |
a55370a3 | 5478 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
5479 | } |
5480 | ||
0ce0c2b5 | 5481 | bool |
52e19c09 | 5482 | nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn) |
c7b9a459 | 5483 | { |
0ce0c2b5 | 5484 | struct nfs4_client_reclaim *crp; |
c7b9a459 | 5485 | |
52e19c09 | 5486 | crp = nfsd4_find_reclaim_client(name, nn); |
0ce0c2b5 | 5487 | return (crp && crp->cr_clp); |
c7b9a459 N |
5488 | } |
5489 | ||
1da177e4 LT |
5490 | /* |
5491 | * failure => all reset bets are off, nfserr_no_grace... | |
5492 | */ | |
772a9bbb | 5493 | struct nfs4_client_reclaim * |
52e19c09 | 5494 | nfs4_client_to_reclaim(const char *name, struct nfsd_net *nn) |
1da177e4 LT |
5495 | { |
5496 | unsigned int strhashval; | |
772a9bbb | 5497 | struct nfs4_client_reclaim *crp; |
1da177e4 | 5498 | |
a55370a3 N |
5499 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
5500 | crp = alloc_reclaim(); | |
772a9bbb JL |
5501 | if (crp) { |
5502 | strhashval = clientstr_hashval(name); | |
5503 | INIT_LIST_HEAD(&crp->cr_strhash); | |
52e19c09 | 5504 | list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]); |
772a9bbb | 5505 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
0ce0c2b5 | 5506 | crp->cr_clp = NULL; |
52e19c09 | 5507 | nn->reclaim_str_hashtbl_size++; |
772a9bbb JL |
5508 | } |
5509 | return crp; | |
1da177e4 LT |
5510 | } |
5511 | ||
ce30e539 | 5512 | void |
52e19c09 | 5513 | nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn) |
ce30e539 JL |
5514 | { |
5515 | list_del(&crp->cr_strhash); | |
5516 | kfree(crp); | |
52e19c09 | 5517 | nn->reclaim_str_hashtbl_size--; |
ce30e539 JL |
5518 | } |
5519 | ||
2a4317c5 | 5520 | void |
52e19c09 | 5521 | nfs4_release_reclaim(struct nfsd_net *nn) |
1da177e4 LT |
5522 | { |
5523 | struct nfs4_client_reclaim *crp = NULL; | |
5524 | int i; | |
5525 | ||
1da177e4 | 5526 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
52e19c09 SK |
5527 | while (!list_empty(&nn->reclaim_str_hashtbl[i])) { |
5528 | crp = list_entry(nn->reclaim_str_hashtbl[i].next, | |
1da177e4 | 5529 | struct nfs4_client_reclaim, cr_strhash); |
52e19c09 | 5530 | nfs4_remove_reclaim_record(crp, nn); |
1da177e4 LT |
5531 | } |
5532 | } | |
063b0fb9 | 5533 | WARN_ON_ONCE(nn->reclaim_str_hashtbl_size); |
1da177e4 LT |
5534 | } |
5535 | ||
5536 | /* | |
5537 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
2a4317c5 | 5538 | struct nfs4_client_reclaim * |
52e19c09 | 5539 | nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn) |
1da177e4 LT |
5540 | { |
5541 | unsigned int strhashval; | |
1da177e4 LT |
5542 | struct nfs4_client_reclaim *crp = NULL; |
5543 | ||
278c931c | 5544 | dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir); |
1da177e4 | 5545 | |
278c931c | 5546 | strhashval = clientstr_hashval(recdir); |
52e19c09 | 5547 | list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) { |
278c931c | 5548 | if (same_name(crp->cr_recdir, recdir)) { |
1da177e4 LT |
5549 | return crp; |
5550 | } | |
5551 | } | |
5552 | return NULL; | |
5553 | } | |
5554 | ||
5555 | /* | |
5556 | * Called from OPEN. Look for clientid in reclaim list. | |
5557 | */ | |
b37ad28b | 5558 | __be32 |
0fe492db TM |
5559 | nfs4_check_open_reclaim(clientid_t *clid, |
5560 | struct nfsd4_compound_state *cstate, | |
5561 | struct nfsd_net *nn) | |
1da177e4 | 5562 | { |
0fe492db | 5563 | __be32 status; |
a52d726b JL |
5564 | |
5565 | /* find clientid in conf_id_hashtbl */ | |
0fe492db TM |
5566 | status = lookup_clientid(clid, cstate, nn); |
5567 | if (status) | |
a52d726b JL |
5568 | return nfserr_reclaim_bad; |
5569 | ||
0fe492db TM |
5570 | if (nfsd4_client_record_check(cstate->clp)) |
5571 | return nfserr_reclaim_bad; | |
5572 | ||
5573 | return nfs_ok; | |
1da177e4 LT |
5574 | } |
5575 | ||
65178db4 BS |
5576 | #ifdef CONFIG_NFSD_FAULT_INJECTION |
5577 | ||
44e34da6 BS |
5578 | u64 nfsd_forget_client(struct nfs4_client *clp, u64 max) |
5579 | { | |
221a6876 BF |
5580 | if (mark_client_expired(clp)) |
5581 | return 0; | |
44e34da6 BS |
5582 | expire_client(clp); |
5583 | return 1; | |
5584 | } | |
5585 | ||
184c1847 BS |
5586 | u64 nfsd_print_client(struct nfs4_client *clp, u64 num) |
5587 | { | |
5588 | char buf[INET6_ADDRSTRLEN]; | |
0a5c33e2 | 5589 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
184c1847 BS |
5590 | printk(KERN_INFO "NFS Client: %s\n", buf); |
5591 | return 1; | |
5592 | } | |
5593 | ||
5594 | static void nfsd_print_count(struct nfs4_client *clp, unsigned int count, | |
5595 | const char *type) | |
5596 | { | |
5597 | char buf[INET6_ADDRSTRLEN]; | |
0a5c33e2 | 5598 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
184c1847 BS |
5599 | printk(KERN_INFO "NFS Client: %s has %u %s\n", buf, count, type); |
5600 | } | |
5601 | ||
3c87b9b7 TM |
5602 | static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max, |
5603 | void (*func)(struct nfs4_ol_stateid *)) | |
fc29171f BS |
5604 | { |
5605 | struct nfs4_openowner *oop; | |
fc29171f | 5606 | struct nfs4_ol_stateid *stp, *st_next; |
3c87b9b7 | 5607 | struct nfs4_ol_stateid *lst, *lst_next; |
fc29171f BS |
5608 | u64 count = 0; |
5609 | ||
5610 | list_for_each_entry(oop, &clp->cl_openowners, oo_perclient) { | |
3c87b9b7 TM |
5611 | list_for_each_entry_safe(stp, st_next, |
5612 | &oop->oo_owner.so_stateids, st_perstateowner) { | |
5613 | list_for_each_entry_safe(lst, lst_next, | |
5614 | &stp->st_locks, st_locks) { | |
fc29171f | 5615 | if (func) |
3c87b9b7 | 5616 | func(lst); |
fc29171f BS |
5617 | if (++count == max) |
5618 | return count; | |
5619 | } | |
5620 | } | |
5621 | } | |
5622 | ||
5623 | return count; | |
5624 | } | |
5625 | ||
5626 | u64 nfsd_forget_client_locks(struct nfs4_client *clp, u64 max) | |
5627 | { | |
3c87b9b7 | 5628 | return nfsd_foreach_client_lock(clp, max, release_lock_stateid); |
fc29171f BS |
5629 | } |
5630 | ||
184c1847 BS |
5631 | u64 nfsd_print_client_locks(struct nfs4_client *clp, u64 max) |
5632 | { | |
5633 | u64 count = nfsd_foreach_client_lock(clp, max, NULL); | |
5634 | nfsd_print_count(clp, count, "locked files"); | |
5635 | return count; | |
5636 | } | |
5637 | ||
4dbdbda8 BS |
5638 | static u64 nfsd_foreach_client_open(struct nfs4_client *clp, u64 max, void (*func)(struct nfs4_openowner *)) |
5639 | { | |
5640 | struct nfs4_openowner *oop, *next; | |
5641 | u64 count = 0; | |
5642 | ||
5643 | list_for_each_entry_safe(oop, next, &clp->cl_openowners, oo_perclient) { | |
5644 | if (func) | |
5645 | func(oop); | |
5646 | if (++count == max) | |
5647 | break; | |
5648 | } | |
5649 | ||
5650 | return count; | |
5651 | } | |
5652 | ||
5653 | u64 nfsd_forget_client_openowners(struct nfs4_client *clp, u64 max) | |
5654 | { | |
5655 | return nfsd_foreach_client_open(clp, max, release_openowner); | |
5656 | } | |
5657 | ||
184c1847 BS |
5658 | u64 nfsd_print_client_openowners(struct nfs4_client *clp, u64 max) |
5659 | { | |
5660 | u64 count = nfsd_foreach_client_open(clp, max, NULL); | |
5661 | nfsd_print_count(clp, count, "open files"); | |
5662 | return count; | |
5663 | } | |
5664 | ||
269de30f BS |
5665 | static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max, |
5666 | struct list_head *victims) | |
5667 | { | |
5668 | struct nfs4_delegation *dp, *next; | |
5669 | u64 count = 0; | |
5670 | ||
cdc97505 | 5671 | lockdep_assert_held(&state_lock); |
269de30f | 5672 | list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) { |
dff1399f JL |
5673 | if (victims) { |
5674 | /* | |
5675 | * It's not safe to mess with delegations that have a | |
5676 | * non-zero dl_time. They might have already been broken | |
5677 | * and could be processed by the laundromat outside of | |
5678 | * the state_lock. Just leave them be. | |
5679 | */ | |
5680 | if (dp->dl_time != 0) | |
5681 | continue; | |
5682 | ||
42690676 JL |
5683 | unhash_delegation_locked(dp); |
5684 | list_add(&dp->dl_recall_lru, victims); | |
dff1399f | 5685 | } |
269de30f BS |
5686 | if (++count == max) |
5687 | break; | |
5688 | } | |
5689 | return count; | |
5690 | } | |
5691 | ||
5692 | u64 nfsd_forget_client_delegations(struct nfs4_client *clp, u64 max) | |
5693 | { | |
5694 | struct nfs4_delegation *dp, *next; | |
5695 | LIST_HEAD(victims); | |
5696 | u64 count; | |
5697 | ||
cdc97505 | 5698 | spin_lock(&state_lock); |
269de30f | 5699 | count = nfsd_find_all_delegations(clp, max, &victims); |
cdc97505 | 5700 | spin_unlock(&state_lock); |
269de30f | 5701 | |
2d4a532d JL |
5702 | list_for_each_entry_safe(dp, next, &victims, dl_recall_lru) { |
5703 | list_del_init(&dp->dl_recall_lru); | |
3bd64a5b | 5704 | revoke_delegation(dp); |
2d4a532d | 5705 | } |
269de30f BS |
5706 | |
5707 | return count; | |
5708 | } | |
5709 | ||
5710 | u64 nfsd_recall_client_delegations(struct nfs4_client *clp, u64 max) | |
5711 | { | |
dff1399f | 5712 | struct nfs4_delegation *dp; |
269de30f BS |
5713 | LIST_HEAD(victims); |
5714 | u64 count; | |
5715 | ||
cdc97505 | 5716 | spin_lock(&state_lock); |
269de30f | 5717 | count = nfsd_find_all_delegations(clp, max, &victims); |
dff1399f JL |
5718 | while (!list_empty(&victims)) { |
5719 | dp = list_first_entry(&victims, struct nfs4_delegation, | |
5720 | dl_recall_lru); | |
5721 | list_del_init(&dp->dl_recall_lru); | |
5722 | dp->dl_time = 0; | |
269de30f | 5723 | nfsd_break_one_deleg(dp); |
dff1399f | 5724 | } |
cdc97505 | 5725 | spin_unlock(&state_lock); |
269de30f BS |
5726 | |
5727 | return count; | |
5728 | } | |
5729 | ||
184c1847 BS |
5730 | u64 nfsd_print_client_delegations(struct nfs4_client *clp, u64 max) |
5731 | { | |
5732 | u64 count = 0; | |
5733 | ||
cdc97505 | 5734 | spin_lock(&state_lock); |
184c1847 | 5735 | count = nfsd_find_all_delegations(clp, max, NULL); |
cdc97505 | 5736 | spin_unlock(&state_lock); |
184c1847 BS |
5737 | |
5738 | nfsd_print_count(clp, count, "delegations"); | |
5739 | return count; | |
5740 | } | |
5741 | ||
44e34da6 | 5742 | u64 nfsd_for_n_state(u64 max, u64 (*func)(struct nfs4_client *, u64)) |
65178db4 BS |
5743 | { |
5744 | struct nfs4_client *clp, *next; | |
44e34da6 | 5745 | u64 count = 0; |
3320fef1 | 5746 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id); |
65178db4 | 5747 | |
44e34da6 BS |
5748 | if (!nfsd_netns_ready(nn)) |
5749 | return 0; | |
5750 | ||
5ed58bb2 | 5751 | list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { |
44e34da6 BS |
5752 | count += func(clp, max - count); |
5753 | if ((max != 0) && (count >= max)) | |
65178db4 BS |
5754 | break; |
5755 | } | |
65178db4 | 5756 | |
44e34da6 BS |
5757 | return count; |
5758 | } | |
5759 | ||
6c1e82a4 BS |
5760 | struct nfs4_client *nfsd_find_client(struct sockaddr_storage *addr, size_t addr_size) |
5761 | { | |
5762 | struct nfs4_client *clp; | |
5763 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id); | |
5764 | ||
5765 | if (!nfsd_netns_ready(nn)) | |
5766 | return NULL; | |
5767 | ||
5768 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
5769 | if (memcmp(&clp->cl_addr, addr, addr_size) == 0) | |
5770 | return clp; | |
5771 | } | |
5772 | return NULL; | |
5773 | } | |
5774 | ||
65178db4 BS |
5775 | #endif /* CONFIG_NFSD_FAULT_INJECTION */ |
5776 | ||
c2f1a551 MS |
5777 | /* |
5778 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
5779 | * client may quite reasonably hang on to a delegation as long as it has | |
5780 | * the inode cached. This becomes an obvious problem the first time a | |
5781 | * client's inode cache approaches the size of the server's total memory. | |
5782 | * | |
5783 | * For now we avoid this problem by imposing a hard limit on the number | |
5784 | * of delegations, which varies according to the server's memory size. | |
5785 | */ | |
5786 | static void | |
5787 | set_max_delegations(void) | |
5788 | { | |
5789 | /* | |
5790 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
5791 | * estimates suggest that in the worst case (where every delegation | |
5792 | * is for a different inode), a delegation could take about 1.5K, | |
5793 | * giving a worst case usage of about 6% of memory. | |
5794 | */ | |
5795 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
5796 | } | |
5797 | ||
d85ed443 | 5798 | static int nfs4_state_create_net(struct net *net) |
8daae4dc SK |
5799 | { |
5800 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
5801 | int i; | |
5802 | ||
5803 | nn->conf_id_hashtbl = kmalloc(sizeof(struct list_head) * | |
5804 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
5805 | if (!nn->conf_id_hashtbl) | |
382a62e7 | 5806 | goto err; |
0a7ec377 SK |
5807 | nn->unconf_id_hashtbl = kmalloc(sizeof(struct list_head) * |
5808 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
5809 | if (!nn->unconf_id_hashtbl) | |
5810 | goto err_unconf_id; | |
1872de0e SK |
5811 | nn->sessionid_hashtbl = kmalloc(sizeof(struct list_head) * |
5812 | SESSION_HASH_SIZE, GFP_KERNEL); | |
5813 | if (!nn->sessionid_hashtbl) | |
5814 | goto err_sessionid; | |
8daae4dc | 5815 | |
382a62e7 | 5816 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
8daae4dc | 5817 | INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]); |
0a7ec377 | 5818 | INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]); |
382a62e7 | 5819 | } |
1872de0e SK |
5820 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
5821 | INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]); | |
382a62e7 | 5822 | nn->conf_name_tree = RB_ROOT; |
a99454aa | 5823 | nn->unconf_name_tree = RB_ROOT; |
5ed58bb2 | 5824 | INIT_LIST_HEAD(&nn->client_lru); |
73758fed | 5825 | INIT_LIST_HEAD(&nn->close_lru); |
e8c69d17 | 5826 | INIT_LIST_HEAD(&nn->del_recall_lru); |
c9a49628 | 5827 | spin_lock_init(&nn->client_lock); |
8daae4dc | 5828 | |
09121281 | 5829 | INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main); |
d85ed443 | 5830 | get_net(net); |
09121281 | 5831 | |
8daae4dc | 5832 | return 0; |
382a62e7 | 5833 | |
1872de0e | 5834 | err_sessionid: |
9b531137 | 5835 | kfree(nn->unconf_id_hashtbl); |
0a7ec377 SK |
5836 | err_unconf_id: |
5837 | kfree(nn->conf_id_hashtbl); | |
382a62e7 SK |
5838 | err: |
5839 | return -ENOMEM; | |
8daae4dc SK |
5840 | } |
5841 | ||
5842 | static void | |
4dce0ac9 | 5843 | nfs4_state_destroy_net(struct net *net) |
8daae4dc SK |
5844 | { |
5845 | int i; | |
5846 | struct nfs4_client *clp = NULL; | |
5847 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
5848 | ||
5849 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { | |
5850 | while (!list_empty(&nn->conf_id_hashtbl[i])) { | |
5851 | clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
5852 | destroy_client(clp); | |
5853 | } | |
5854 | } | |
a99454aa | 5855 | |
2b905635 KM |
5856 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
5857 | while (!list_empty(&nn->unconf_id_hashtbl[i])) { | |
5858 | clp = list_entry(nn->unconf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
5859 | destroy_client(clp); | |
5860 | } | |
a99454aa SK |
5861 | } |
5862 | ||
1872de0e | 5863 | kfree(nn->sessionid_hashtbl); |
0a7ec377 | 5864 | kfree(nn->unconf_id_hashtbl); |
8daae4dc | 5865 | kfree(nn->conf_id_hashtbl); |
4dce0ac9 | 5866 | put_net(net); |
8daae4dc SK |
5867 | } |
5868 | ||
f252bc68 | 5869 | int |
d85ed443 | 5870 | nfs4_state_start_net(struct net *net) |
ac4d8ff2 | 5871 | { |
5e1533c7 | 5872 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b5a1a81e BF |
5873 | int ret; |
5874 | ||
d85ed443 | 5875 | ret = nfs4_state_create_net(net); |
8daae4dc SK |
5876 | if (ret) |
5877 | return ret; | |
5e1533c7 | 5878 | nfsd4_client_tracking_init(net); |
2c142baa | 5879 | nn->boot_time = get_seconds(); |
5ccb0066 | 5880 | locks_start_grace(net, &nn->nfsd4_manager); |
a51c84ed | 5881 | nn->grace_ended = false; |
d85ed443 | 5882 | printk(KERN_INFO "NFSD: starting %ld-second grace period (net %p)\n", |
5284b44e SK |
5883 | nn->nfsd4_grace, net); |
5884 | queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ); | |
d85ed443 SK |
5885 | return 0; |
5886 | } | |
5887 | ||
5888 | /* initialization to perform when the nfsd service is started: */ | |
5889 | ||
5890 | int | |
5891 | nfs4_state_start(void) | |
5892 | { | |
5893 | int ret; | |
5894 | ||
b5a1a81e | 5895 | ret = set_callback_cred(); |
d85ed443 SK |
5896 | if (ret) |
5897 | return -ENOMEM; | |
58da282b | 5898 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
a6d6b781 JL |
5899 | if (laundry_wq == NULL) { |
5900 | ret = -ENOMEM; | |
5901 | goto out_recovery; | |
5902 | } | |
b5a1a81e BF |
5903 | ret = nfsd4_create_callback_queue(); |
5904 | if (ret) | |
5905 | goto out_free_laundry; | |
09121281 | 5906 | |
c2f1a551 | 5907 | set_max_delegations(); |
d85ed443 | 5908 | |
b5a1a81e | 5909 | return 0; |
d85ed443 | 5910 | |
b5a1a81e BF |
5911 | out_free_laundry: |
5912 | destroy_workqueue(laundry_wq); | |
a6d6b781 | 5913 | out_recovery: |
b5a1a81e | 5914 | return ret; |
1da177e4 LT |
5915 | } |
5916 | ||
f252bc68 | 5917 | void |
4dce0ac9 | 5918 | nfs4_state_shutdown_net(struct net *net) |
1da177e4 | 5919 | { |
1da177e4 | 5920 | struct nfs4_delegation *dp = NULL; |
1da177e4 | 5921 | struct list_head *pos, *next, reaplist; |
4dce0ac9 | 5922 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
1da177e4 | 5923 | |
4dce0ac9 SK |
5924 | cancel_delayed_work_sync(&nn->laundromat_work); |
5925 | locks_end_grace(&nn->nfsd4_manager); | |
ac55fdc4 | 5926 | |
e50a26dc | 5927 | nfs4_lock_state(); |
1da177e4 | 5928 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 5929 | spin_lock(&state_lock); |
e8c69d17 | 5930 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 | 5931 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
42690676 JL |
5932 | unhash_delegation_locked(dp); |
5933 | list_add(&dp->dl_recall_lru, &reaplist); | |
1da177e4 | 5934 | } |
cdc97505 | 5935 | spin_unlock(&state_lock); |
1da177e4 LT |
5936 | list_for_each_safe(pos, next, &reaplist) { |
5937 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
42690676 | 5938 | list_del_init(&dp->dl_recall_lru); |
6011695d | 5939 | nfs4_put_stid(&dp->dl_stid); |
1da177e4 LT |
5940 | } |
5941 | ||
3320fef1 | 5942 | nfsd4_client_tracking_exit(net); |
4dce0ac9 | 5943 | nfs4_state_destroy_net(net); |
e50a26dc | 5944 | nfs4_unlock_state(); |
1da177e4 LT |
5945 | } |
5946 | ||
5947 | void | |
5948 | nfs4_state_shutdown(void) | |
5949 | { | |
5e8d5c29 | 5950 | destroy_workqueue(laundry_wq); |
c3935e30 | 5951 | nfsd4_destroy_callback_queue(); |
1da177e4 | 5952 | } |
8b70484c TM |
5953 | |
5954 | static void | |
5955 | get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
5956 | { | |
37c593c5 TM |
5957 | if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) |
5958 | memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); | |
8b70484c TM |
5959 | } |
5960 | ||
5961 | static void | |
5962 | put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
5963 | { | |
37c593c5 TM |
5964 | if (cstate->minorversion) { |
5965 | memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); | |
5966 | SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
5967 | } | |
5968 | } | |
5969 | ||
5970 | void | |
5971 | clear_current_stateid(struct nfsd4_compound_state *cstate) | |
5972 | { | |
5973 | CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
8b70484c TM |
5974 | } |
5975 | ||
62cd4a59 TM |
5976 | /* |
5977 | * functions to set current state id | |
5978 | */ | |
9428fe1a TM |
5979 | void |
5980 | nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
5981 | { | |
5982 | put_stateid(cstate, &odp->od_stateid); | |
5983 | } | |
5984 | ||
8b70484c TM |
5985 | void |
5986 | nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) | |
5987 | { | |
5988 | put_stateid(cstate, &open->op_stateid); | |
5989 | } | |
5990 | ||
62cd4a59 TM |
5991 | void |
5992 | nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
5993 | { | |
5994 | put_stateid(cstate, &close->cl_stateid); | |
5995 | } | |
5996 | ||
5997 | void | |
5998 | nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) | |
5999 | { | |
6000 | put_stateid(cstate, &lock->lk_resp_stateid); | |
6001 | } | |
6002 | ||
6003 | /* | |
6004 | * functions to consume current state id | |
6005 | */ | |
1e97b519 | 6006 | |
9428fe1a TM |
6007 | void |
6008 | nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
6009 | { | |
6010 | get_stateid(cstate, &odp->od_stateid); | |
6011 | } | |
6012 | ||
6013 | void | |
6014 | nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) | |
6015 | { | |
6016 | get_stateid(cstate, &drp->dr_stateid); | |
6017 | } | |
6018 | ||
1e97b519 TM |
6019 | void |
6020 | nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) | |
6021 | { | |
6022 | get_stateid(cstate, &fsp->fr_stateid); | |
6023 | } | |
6024 | ||
6025 | void | |
6026 | nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) | |
6027 | { | |
6028 | get_stateid(cstate, &setattr->sa_stateid); | |
6029 | } | |
6030 | ||
8b70484c TM |
6031 | void |
6032 | nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
6033 | { | |
6034 | get_stateid(cstate, &close->cl_stateid); | |
6035 | } | |
6036 | ||
6037 | void | |
62cd4a59 | 6038 | nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) |
8b70484c | 6039 | { |
62cd4a59 | 6040 | get_stateid(cstate, &locku->lu_stateid); |
8b70484c | 6041 | } |
30813e27 TM |
6042 | |
6043 | void | |
6044 | nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) | |
6045 | { | |
6046 | get_stateid(cstate, &read->rd_stateid); | |
6047 | } | |
6048 | ||
6049 | void | |
6050 | nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) | |
6051 | { | |
6052 | get_stateid(cstate, &write->wr_stateid); | |
6053 | } |