Commit | Line | Data |
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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (c) 2001 The Regents of the University of Michigan. |
3 | * All rights reserved. | |
4 | * | |
5 | * Kendrick Smith <kmsmith@umich.edu> | |
6 | * Andy Adamson <kandros@umich.edu> | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * | |
12 | * 1. Redistributions of source code must retain the above copyright | |
13 | * notice, this list of conditions and the following disclaimer. | |
14 | * 2. Redistributions in binary form must reproduce the above copyright | |
15 | * notice, this list of conditions and the following disclaimer in the | |
16 | * documentation and/or other materials provided with the distribution. | |
17 | * 3. Neither the name of the University nor the names of its | |
18 | * contributors may be used to endorse or promote products derived | |
19 | * from this software without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
22 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
23 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
24 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
26 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
27 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
28 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
29 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
30 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
31 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
32 | * | |
33 | */ | |
34 | ||
aceaf78d | 35 | #include <linux/file.h> |
b89f4321 | 36 | #include <linux/fs.h> |
5a0e3ad6 | 37 | #include <linux/slab.h> |
0964a3d3 | 38 | #include <linux/namei.h> |
c2f1a551 | 39 | #include <linux/swap.h> |
17456804 | 40 | #include <linux/pagemap.h> |
7df302f7 | 41 | #include <linux/ratelimit.h> |
68e76ad0 | 42 | #include <linux/sunrpc/svcauth_gss.h> |
5976687a | 43 | #include <linux/sunrpc/addr.h> |
6282cd56 | 44 | #include <linux/hash.h> |
9a74af21 | 45 | #include "xdr4.h" |
06b332a5 | 46 | #include "xdr4cb.h" |
0a3adade | 47 | #include "vfs.h" |
bfa4b365 | 48 | #include "current_stateid.h" |
1da177e4 | 49 | |
5e1533c7 SK |
50 | #include "netns.h" |
51 | ||
1da177e4 LT |
52 | #define NFSDDBG_FACILITY NFSDDBG_PROC |
53 | ||
f32f3c2d BF |
54 | #define all_ones {{~0,~0},~0} |
55 | static const stateid_t one_stateid = { | |
56 | .si_generation = ~0, | |
57 | .si_opaque = all_ones, | |
58 | }; | |
59 | static const stateid_t zero_stateid = { | |
60 | /* all fields zero */ | |
61 | }; | |
19ff0f28 TM |
62 | static const stateid_t currentstateid = { |
63 | .si_generation = 1, | |
64 | }; | |
f32f3c2d | 65 | |
ec6b5d7b | 66 | static u64 current_sessionid = 1; |
fd39ca9a | 67 | |
f32f3c2d BF |
68 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t))) |
69 | #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t))) | |
19ff0f28 | 70 | #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t))) |
1da177e4 | 71 | |
1da177e4 | 72 | /* forward declarations */ |
f9c00c3a | 73 | static bool check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner); |
6011695d | 74 | static void nfs4_free_ol_stateid(struct nfs4_stid *stid); |
1da177e4 | 75 | |
8b671b80 BF |
76 | /* Locking: */ |
77 | ||
78 | /* Currently used for almost all code touching nfsv4 state: */ | |
353ab6e9 | 79 | static DEFINE_MUTEX(client_mutex); |
1da177e4 | 80 | |
8b671b80 BF |
81 | /* |
82 | * Currently used for the del_recall_lru and file hash table. In an | |
83 | * effort to decrease the scope of the client_mutex, this spinlock may | |
84 | * eventually cover more: | |
85 | */ | |
cdc97505 | 86 | static DEFINE_SPINLOCK(state_lock); |
8b671b80 | 87 | |
b401be22 JL |
88 | /* |
89 | * A waitqueue for all in-progress 4.0 CLOSE operations that are waiting for | |
90 | * the refcount on the open stateid to drop. | |
91 | */ | |
92 | static DECLARE_WAIT_QUEUE_HEAD(close_wq); | |
93 | ||
abf1135b CH |
94 | static struct kmem_cache *openowner_slab; |
95 | static struct kmem_cache *lockowner_slab; | |
96 | static struct kmem_cache *file_slab; | |
97 | static struct kmem_cache *stateid_slab; | |
98 | static struct kmem_cache *deleg_slab; | |
e60d4398 | 99 | |
1da177e4 LT |
100 | void |
101 | nfs4_lock_state(void) | |
102 | { | |
353ab6e9 | 103 | mutex_lock(&client_mutex); |
1da177e4 LT |
104 | } |
105 | ||
66b2b9b2 | 106 | static void free_session(struct nfsd4_session *); |
508dc6e1 | 107 | |
f0f51f5c | 108 | static bool is_session_dead(struct nfsd4_session *ses) |
66b2b9b2 | 109 | { |
f0f51f5c | 110 | return ses->se_flags & NFS4_SESSION_DEAD; |
66b2b9b2 BF |
111 | } |
112 | ||
f0f51f5c | 113 | static __be32 mark_session_dead_locked(struct nfsd4_session *ses, int ref_held_by_me) |
508dc6e1 | 114 | { |
f0f51f5c | 115 | if (atomic_read(&ses->se_ref) > ref_held_by_me) |
66b2b9b2 BF |
116 | return nfserr_jukebox; |
117 | ses->se_flags |= NFS4_SESSION_DEAD; | |
118 | return nfs_ok; | |
508dc6e1 BH |
119 | } |
120 | ||
1da177e4 LT |
121 | void |
122 | nfs4_unlock_state(void) | |
123 | { | |
353ab6e9 | 124 | mutex_unlock(&client_mutex); |
1da177e4 LT |
125 | } |
126 | ||
221a6876 BF |
127 | static bool is_client_expired(struct nfs4_client *clp) |
128 | { | |
129 | return clp->cl_time == 0; | |
130 | } | |
131 | ||
132 | static __be32 mark_client_expired_locked(struct nfs4_client *clp) | |
133 | { | |
134 | if (atomic_read(&clp->cl_refcount)) | |
135 | return nfserr_jukebox; | |
136 | clp->cl_time = 0; | |
137 | return nfs_ok; | |
138 | } | |
139 | ||
140 | static __be32 mark_client_expired(struct nfs4_client *clp) | |
141 | { | |
142 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
143 | __be32 ret; | |
144 | ||
145 | spin_lock(&nn->client_lock); | |
146 | ret = mark_client_expired_locked(clp); | |
147 | spin_unlock(&nn->client_lock); | |
148 | return ret; | |
149 | } | |
150 | ||
151 | static __be32 get_client_locked(struct nfs4_client *clp) | |
152 | { | |
153 | if (is_client_expired(clp)) | |
154 | return nfserr_expired; | |
155 | atomic_inc(&clp->cl_refcount); | |
156 | return nfs_ok; | |
157 | } | |
158 | ||
159 | /* must be called under the client_lock */ | |
160 | static inline void | |
161 | renew_client_locked(struct nfs4_client *clp) | |
162 | { | |
163 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
164 | ||
165 | if (is_client_expired(clp)) { | |
166 | WARN_ON(1); | |
167 | printk("%s: client (clientid %08x/%08x) already expired\n", | |
168 | __func__, | |
169 | clp->cl_clientid.cl_boot, | |
170 | clp->cl_clientid.cl_id); | |
171 | return; | |
172 | } | |
173 | ||
174 | dprintk("renewing client (clientid %08x/%08x)\n", | |
175 | clp->cl_clientid.cl_boot, | |
176 | clp->cl_clientid.cl_id); | |
177 | list_move_tail(&clp->cl_lru, &nn->client_lru); | |
178 | clp->cl_time = get_seconds(); | |
179 | } | |
180 | ||
181 | static inline void | |
182 | renew_client(struct nfs4_client *clp) | |
183 | { | |
184 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
185 | ||
186 | spin_lock(&nn->client_lock); | |
187 | renew_client_locked(clp); | |
188 | spin_unlock(&nn->client_lock); | |
189 | } | |
190 | ||
ba138435 | 191 | static void put_client_renew_locked(struct nfs4_client *clp) |
221a6876 BF |
192 | { |
193 | if (!atomic_dec_and_test(&clp->cl_refcount)) | |
194 | return; | |
195 | if (!is_client_expired(clp)) | |
196 | renew_client_locked(clp); | |
197 | } | |
198 | ||
4b24ca7d JL |
199 | static void put_client_renew(struct nfs4_client *clp) |
200 | { | |
201 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
202 | ||
d6c249b4 JL |
203 | if (!atomic_dec_and_lock(&clp->cl_refcount, &nn->client_lock)) |
204 | return; | |
205 | if (!is_client_expired(clp)) | |
206 | renew_client_locked(clp); | |
4b24ca7d JL |
207 | spin_unlock(&nn->client_lock); |
208 | } | |
209 | ||
d4e19e70 TM |
210 | static __be32 nfsd4_get_session_locked(struct nfsd4_session *ses) |
211 | { | |
212 | __be32 status; | |
213 | ||
214 | if (is_session_dead(ses)) | |
215 | return nfserr_badsession; | |
216 | status = get_client_locked(ses->se_client); | |
217 | if (status) | |
218 | return status; | |
219 | atomic_inc(&ses->se_ref); | |
220 | return nfs_ok; | |
221 | } | |
222 | ||
223 | static void nfsd4_put_session_locked(struct nfsd4_session *ses) | |
224 | { | |
225 | struct nfs4_client *clp = ses->se_client; | |
226 | ||
227 | if (atomic_dec_and_test(&ses->se_ref) && is_session_dead(ses)) | |
228 | free_session(ses); | |
229 | put_client_renew_locked(clp); | |
230 | } | |
231 | ||
232 | static void nfsd4_put_session(struct nfsd4_session *ses) | |
233 | { | |
234 | struct nfs4_client *clp = ses->se_client; | |
235 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
236 | ||
237 | spin_lock(&nn->client_lock); | |
238 | nfsd4_put_session_locked(ses); | |
239 | spin_unlock(&nn->client_lock); | |
240 | } | |
241 | ||
7ffb5880 | 242 | static int |
d4f0489f | 243 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner) |
7ffb5880 TM |
244 | { |
245 | return (sop->so_owner.len == owner->len) && | |
d4f0489f | 246 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len); |
7ffb5880 TM |
247 | } |
248 | ||
249 | static struct nfs4_openowner * | |
250 | find_openstateowner_str_locked(unsigned int hashval, struct nfsd4_open *open, | |
d4f0489f | 251 | struct nfs4_client *clp) |
7ffb5880 TM |
252 | { |
253 | struct nfs4_stateowner *so; | |
7ffb5880 | 254 | |
d4f0489f | 255 | lockdep_assert_held(&clp->cl_lock); |
7ffb5880 | 256 | |
d4f0489f TM |
257 | list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[hashval], |
258 | so_strhash) { | |
7ffb5880 TM |
259 | if (!so->so_is_open_owner) |
260 | continue; | |
d4f0489f | 261 | if (same_owner_str(so, &open->op_owner)) { |
7ffb5880 | 262 | atomic_inc(&so->so_count); |
d4f0489f | 263 | return openowner(so); |
7ffb5880 TM |
264 | } |
265 | } | |
266 | return NULL; | |
267 | } | |
268 | ||
269 | static struct nfs4_openowner * | |
270 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, | |
d4f0489f | 271 | struct nfs4_client *clp) |
7ffb5880 TM |
272 | { |
273 | struct nfs4_openowner *oo; | |
274 | ||
d4f0489f TM |
275 | spin_lock(&clp->cl_lock); |
276 | oo = find_openstateowner_str_locked(hashval, open, clp); | |
277 | spin_unlock(&clp->cl_lock); | |
7ffb5880 TM |
278 | return oo; |
279 | } | |
280 | ||
1da177e4 LT |
281 | static inline u32 |
282 | opaque_hashval(const void *ptr, int nbytes) | |
283 | { | |
284 | unsigned char *cptr = (unsigned char *) ptr; | |
285 | ||
286 | u32 x = 0; | |
287 | while (nbytes--) { | |
288 | x *= 37; | |
289 | x += *cptr++; | |
290 | } | |
291 | return x; | |
292 | } | |
293 | ||
32513b40 BF |
294 | static void nfsd4_free_file(struct nfs4_file *f) |
295 | { | |
296 | kmem_cache_free(file_slab, f); | |
297 | } | |
298 | ||
13cd2184 N |
299 | static inline void |
300 | put_nfs4_file(struct nfs4_file *fi) | |
301 | { | |
02e1215f JL |
302 | might_lock(&state_lock); |
303 | ||
cdc97505 | 304 | if (atomic_dec_and_lock(&fi->fi_ref, &state_lock)) { |
89876f8c | 305 | hlist_del(&fi->fi_hash); |
cdc97505 | 306 | spin_unlock(&state_lock); |
32513b40 | 307 | nfsd4_free_file(fi); |
8b671b80 | 308 | } |
13cd2184 N |
309 | } |
310 | ||
311 | static inline void | |
312 | get_nfs4_file(struct nfs4_file *fi) | |
313 | { | |
8b671b80 | 314 | atomic_inc(&fi->fi_ref); |
13cd2184 N |
315 | } |
316 | ||
de18643d TM |
317 | static struct file * |
318 | __nfs4_get_fd(struct nfs4_file *f, int oflag) | |
319 | { | |
320 | if (f->fi_fds[oflag]) | |
321 | return get_file(f->fi_fds[oflag]); | |
322 | return NULL; | |
323 | } | |
324 | ||
325 | static struct file * | |
326 | find_writeable_file_locked(struct nfs4_file *f) | |
327 | { | |
328 | struct file *ret; | |
329 | ||
330 | lockdep_assert_held(&f->fi_lock); | |
331 | ||
332 | ret = __nfs4_get_fd(f, O_WRONLY); | |
333 | if (!ret) | |
334 | ret = __nfs4_get_fd(f, O_RDWR); | |
335 | return ret; | |
336 | } | |
337 | ||
338 | static struct file * | |
339 | find_writeable_file(struct nfs4_file *f) | |
340 | { | |
341 | struct file *ret; | |
342 | ||
343 | spin_lock(&f->fi_lock); | |
344 | ret = find_writeable_file_locked(f); | |
345 | spin_unlock(&f->fi_lock); | |
346 | ||
347 | return ret; | |
348 | } | |
349 | ||
350 | static struct file *find_readable_file_locked(struct nfs4_file *f) | |
351 | { | |
352 | struct file *ret; | |
353 | ||
354 | lockdep_assert_held(&f->fi_lock); | |
355 | ||
356 | ret = __nfs4_get_fd(f, O_RDONLY); | |
357 | if (!ret) | |
358 | ret = __nfs4_get_fd(f, O_RDWR); | |
359 | return ret; | |
360 | } | |
361 | ||
362 | static struct file * | |
363 | find_readable_file(struct nfs4_file *f) | |
364 | { | |
365 | struct file *ret; | |
366 | ||
367 | spin_lock(&f->fi_lock); | |
368 | ret = find_readable_file_locked(f); | |
369 | spin_unlock(&f->fi_lock); | |
370 | ||
371 | return ret; | |
372 | } | |
373 | ||
374 | static struct file * | |
375 | find_any_file(struct nfs4_file *f) | |
376 | { | |
377 | struct file *ret; | |
378 | ||
379 | spin_lock(&f->fi_lock); | |
380 | ret = __nfs4_get_fd(f, O_RDWR); | |
381 | if (!ret) { | |
382 | ret = __nfs4_get_fd(f, O_WRONLY); | |
383 | if (!ret) | |
384 | ret = __nfs4_get_fd(f, O_RDONLY); | |
385 | } | |
386 | spin_unlock(&f->fi_lock); | |
387 | return ret; | |
388 | } | |
389 | ||
02a3508d | 390 | static atomic_long_t num_delegations; |
697ce9be | 391 | unsigned long max_delegations; |
ef0f3390 N |
392 | |
393 | /* | |
394 | * Open owner state (share locks) | |
395 | */ | |
396 | ||
16bfdaaf BF |
397 | /* hash tables for lock and open owners */ |
398 | #define OWNER_HASH_BITS 8 | |
399 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
400 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
ef0f3390 | 401 | |
d4f0489f | 402 | static unsigned int ownerstr_hashval(struct xdr_netobj *ownername) |
ddc04c41 BF |
403 | { |
404 | unsigned int ret; | |
405 | ||
406 | ret = opaque_hashval(ownername->data, ownername->len); | |
16bfdaaf | 407 | return ret & OWNER_HASH_MASK; |
ddc04c41 | 408 | } |
ef0f3390 | 409 | |
ef0f3390 N |
410 | /* hash table for nfs4_file */ |
411 | #define FILE_HASH_BITS 8 | |
412 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
35079582 | 413 | |
ca943217 | 414 | static unsigned int nfsd_fh_hashval(struct knfsd_fh *fh) |
ddc04c41 | 415 | { |
ca943217 TM |
416 | return jhash2(fh->fh_base.fh_pad, XDR_QUADLEN(fh->fh_size), 0); |
417 | } | |
418 | ||
419 | static unsigned int file_hashval(struct knfsd_fh *fh) | |
420 | { | |
421 | return nfsd_fh_hashval(fh) & (FILE_HASH_SIZE - 1); | |
422 | } | |
423 | ||
424 | static bool nfsd_fh_match(struct knfsd_fh *fh1, struct knfsd_fh *fh2) | |
425 | { | |
426 | return fh1->fh_size == fh2->fh_size && | |
427 | !memcmp(fh1->fh_base.fh_pad, | |
428 | fh2->fh_base.fh_pad, | |
429 | fh1->fh_size); | |
ddc04c41 BF |
430 | } |
431 | ||
89876f8c | 432 | static struct hlist_head file_hashtbl[FILE_HASH_SIZE]; |
ef0f3390 | 433 | |
12659651 JL |
434 | static void |
435 | __nfs4_file_get_access(struct nfs4_file *fp, u32 access) | |
3477565e | 436 | { |
7214e860 JL |
437 | lockdep_assert_held(&fp->fi_lock); |
438 | ||
12659651 JL |
439 | if (access & NFS4_SHARE_ACCESS_WRITE) |
440 | atomic_inc(&fp->fi_access[O_WRONLY]); | |
441 | if (access & NFS4_SHARE_ACCESS_READ) | |
442 | atomic_inc(&fp->fi_access[O_RDONLY]); | |
3477565e BF |
443 | } |
444 | ||
12659651 JL |
445 | static __be32 |
446 | nfs4_file_get_access(struct nfs4_file *fp, u32 access) | |
998db52c | 447 | { |
7214e860 JL |
448 | lockdep_assert_held(&fp->fi_lock); |
449 | ||
12659651 JL |
450 | /* Does this access mode make sense? */ |
451 | if (access & ~NFS4_SHARE_ACCESS_BOTH) | |
452 | return nfserr_inval; | |
453 | ||
baeb4ff0 JL |
454 | /* Does it conflict with a deny mode already set? */ |
455 | if ((access & fp->fi_share_deny) != 0) | |
456 | return nfserr_share_denied; | |
457 | ||
12659651 JL |
458 | __nfs4_file_get_access(fp, access); |
459 | return nfs_ok; | |
998db52c BF |
460 | } |
461 | ||
baeb4ff0 JL |
462 | static __be32 nfs4_file_check_deny(struct nfs4_file *fp, u32 deny) |
463 | { | |
464 | /* Common case is that there is no deny mode. */ | |
465 | if (deny) { | |
466 | /* Does this deny mode make sense? */ | |
467 | if (deny & ~NFS4_SHARE_DENY_BOTH) | |
468 | return nfserr_inval; | |
469 | ||
470 | if ((deny & NFS4_SHARE_DENY_READ) && | |
471 | atomic_read(&fp->fi_access[O_RDONLY])) | |
472 | return nfserr_share_denied; | |
473 | ||
474 | if ((deny & NFS4_SHARE_DENY_WRITE) && | |
475 | atomic_read(&fp->fi_access[O_WRONLY])) | |
476 | return nfserr_share_denied; | |
477 | } | |
478 | return nfs_ok; | |
479 | } | |
480 | ||
998db52c | 481 | static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
f9d7562f | 482 | { |
de18643d TM |
483 | might_lock(&fp->fi_lock); |
484 | ||
485 | if (atomic_dec_and_lock(&fp->fi_access[oflag], &fp->fi_lock)) { | |
486 | struct file *f1 = NULL; | |
487 | struct file *f2 = NULL; | |
488 | ||
6d338b51 | 489 | swap(f1, fp->fi_fds[oflag]); |
0c7c3e67 | 490 | if (atomic_read(&fp->fi_access[1 - oflag]) == 0) |
6d338b51 | 491 | swap(f2, fp->fi_fds[O_RDWR]); |
de18643d TM |
492 | spin_unlock(&fp->fi_lock); |
493 | if (f1) | |
494 | fput(f1); | |
495 | if (f2) | |
496 | fput(f2); | |
f9d7562f BF |
497 | } |
498 | } | |
499 | ||
12659651 | 500 | static void nfs4_file_put_access(struct nfs4_file *fp, u32 access) |
998db52c | 501 | { |
12659651 JL |
502 | WARN_ON_ONCE(access & ~NFS4_SHARE_ACCESS_BOTH); |
503 | ||
504 | if (access & NFS4_SHARE_ACCESS_WRITE) | |
998db52c | 505 | __nfs4_file_put_access(fp, O_WRONLY); |
12659651 JL |
506 | if (access & NFS4_SHARE_ACCESS_READ) |
507 | __nfs4_file_put_access(fp, O_RDONLY); | |
998db52c BF |
508 | } |
509 | ||
6011695d TM |
510 | static struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, |
511 | struct kmem_cache *slab) | |
2a74aba7 | 512 | { |
3abdb607 | 513 | struct nfs4_stid *stid; |
6136d2b4 | 514 | int new_id; |
2a74aba7 | 515 | |
f8338834 | 516 | stid = kmem_cache_zalloc(slab, GFP_KERNEL); |
3abdb607 BF |
517 | if (!stid) |
518 | return NULL; | |
519 | ||
4770d722 JL |
520 | idr_preload(GFP_KERNEL); |
521 | spin_lock(&cl->cl_lock); | |
522 | new_id = idr_alloc_cyclic(&cl->cl_stateids, stid, 0, 0, GFP_NOWAIT); | |
523 | spin_unlock(&cl->cl_lock); | |
524 | idr_preload_end(); | |
ebd6c707 | 525 | if (new_id < 0) |
3abdb607 | 526 | goto out_free; |
2a74aba7 | 527 | stid->sc_client = cl; |
3abdb607 BF |
528 | stid->sc_stateid.si_opaque.so_id = new_id; |
529 | stid->sc_stateid.si_opaque.so_clid = cl->cl_clientid; | |
2a74aba7 | 530 | /* Will be incremented before return to client: */ |
72c0b0fb | 531 | atomic_set(&stid->sc_count, 1); |
996e0938 | 532 | |
996e0938 | 533 | /* |
3abdb607 BF |
534 | * It shouldn't be a problem to reuse an opaque stateid value. |
535 | * I don't think it is for 4.1. But with 4.0 I worry that, for | |
536 | * example, a stray write retransmission could be accepted by | |
537 | * the server when it should have been rejected. Therefore, | |
538 | * adopt a trick from the sctp code to attempt to maximize the | |
539 | * amount of time until an id is reused, by ensuring they always | |
540 | * "increase" (mod INT_MAX): | |
996e0938 | 541 | */ |
3abdb607 BF |
542 | return stid; |
543 | out_free: | |
2c44a234 | 544 | kmem_cache_free(slab, stid); |
3abdb607 | 545 | return NULL; |
2a74aba7 BF |
546 | } |
547 | ||
b49e084d | 548 | static struct nfs4_ol_stateid * nfs4_alloc_open_stateid(struct nfs4_client *clp) |
4cdc951b | 549 | { |
6011695d TM |
550 | struct nfs4_stid *stid; |
551 | struct nfs4_ol_stateid *stp; | |
552 | ||
553 | stid = nfs4_alloc_stid(clp, stateid_slab); | |
554 | if (!stid) | |
555 | return NULL; | |
556 | ||
557 | stp = openlockstateid(stid); | |
558 | stp->st_stid.sc_free = nfs4_free_ol_stateid; | |
559 | return stp; | |
560 | } | |
561 | ||
562 | static void nfs4_free_deleg(struct nfs4_stid *stid) | |
563 | { | |
6011695d TM |
564 | kmem_cache_free(deleg_slab, stid); |
565 | atomic_long_dec(&num_delegations); | |
4cdc951b BF |
566 | } |
567 | ||
6282cd56 N |
568 | /* |
569 | * When we recall a delegation, we should be careful not to hand it | |
570 | * out again straight away. | |
571 | * To ensure this we keep a pair of bloom filters ('new' and 'old') | |
572 | * in which the filehandles of recalled delegations are "stored". | |
573 | * If a filehandle appear in either filter, a delegation is blocked. | |
574 | * When a delegation is recalled, the filehandle is stored in the "new" | |
575 | * filter. | |
576 | * Every 30 seconds we swap the filters and clear the "new" one, | |
577 | * unless both are empty of course. | |
578 | * | |
579 | * Each filter is 256 bits. We hash the filehandle to 32bit and use the | |
580 | * low 3 bytes as hash-table indices. | |
581 | * | |
f54fe962 | 582 | * 'blocked_delegations_lock', which is always taken in block_delegations(), |
6282cd56 N |
583 | * is used to manage concurrent access. Testing does not need the lock |
584 | * except when swapping the two filters. | |
585 | */ | |
f54fe962 | 586 | static DEFINE_SPINLOCK(blocked_delegations_lock); |
6282cd56 N |
587 | static struct bloom_pair { |
588 | int entries, old_entries; | |
589 | time_t swap_time; | |
590 | int new; /* index into 'set' */ | |
591 | DECLARE_BITMAP(set[2], 256); | |
592 | } blocked_delegations; | |
593 | ||
594 | static int delegation_blocked(struct knfsd_fh *fh) | |
595 | { | |
596 | u32 hash; | |
597 | struct bloom_pair *bd = &blocked_delegations; | |
598 | ||
599 | if (bd->entries == 0) | |
600 | return 0; | |
601 | if (seconds_since_boot() - bd->swap_time > 30) { | |
f54fe962 | 602 | spin_lock(&blocked_delegations_lock); |
6282cd56 N |
603 | if (seconds_since_boot() - bd->swap_time > 30) { |
604 | bd->entries -= bd->old_entries; | |
605 | bd->old_entries = bd->entries; | |
606 | memset(bd->set[bd->new], 0, | |
607 | sizeof(bd->set[0])); | |
608 | bd->new = 1-bd->new; | |
609 | bd->swap_time = seconds_since_boot(); | |
610 | } | |
f54fe962 | 611 | spin_unlock(&blocked_delegations_lock); |
6282cd56 N |
612 | } |
613 | hash = arch_fast_hash(&fh->fh_base, fh->fh_size, 0); | |
614 | if (test_bit(hash&255, bd->set[0]) && | |
615 | test_bit((hash>>8)&255, bd->set[0]) && | |
616 | test_bit((hash>>16)&255, bd->set[0])) | |
617 | return 1; | |
618 | ||
619 | if (test_bit(hash&255, bd->set[1]) && | |
620 | test_bit((hash>>8)&255, bd->set[1]) && | |
621 | test_bit((hash>>16)&255, bd->set[1])) | |
622 | return 1; | |
623 | ||
624 | return 0; | |
625 | } | |
626 | ||
627 | static void block_delegations(struct knfsd_fh *fh) | |
628 | { | |
629 | u32 hash; | |
630 | struct bloom_pair *bd = &blocked_delegations; | |
631 | ||
632 | hash = arch_fast_hash(&fh->fh_base, fh->fh_size, 0); | |
633 | ||
f54fe962 | 634 | spin_lock(&blocked_delegations_lock); |
6282cd56 N |
635 | __set_bit(hash&255, bd->set[bd->new]); |
636 | __set_bit((hash>>8)&255, bd->set[bd->new]); | |
637 | __set_bit((hash>>16)&255, bd->set[bd->new]); | |
638 | if (bd->entries == 0) | |
639 | bd->swap_time = seconds_since_boot(); | |
640 | bd->entries += 1; | |
f54fe962 | 641 | spin_unlock(&blocked_delegations_lock); |
6282cd56 N |
642 | } |
643 | ||
1da177e4 | 644 | static struct nfs4_delegation * |
f9416e28 | 645 | alloc_init_deleg(struct nfs4_client *clp, struct svc_fh *current_fh) |
1da177e4 LT |
646 | { |
647 | struct nfs4_delegation *dp; | |
02a3508d | 648 | long n; |
1da177e4 LT |
649 | |
650 | dprintk("NFSD alloc_init_deleg\n"); | |
02a3508d TM |
651 | n = atomic_long_inc_return(&num_delegations); |
652 | if (n < 0 || n > max_delegations) | |
653 | goto out_dec; | |
6282cd56 | 654 | if (delegation_blocked(¤t_fh->fh_handle)) |
02a3508d | 655 | goto out_dec; |
996e0938 | 656 | dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab)); |
5b2d21c1 | 657 | if (dp == NULL) |
02a3508d | 658 | goto out_dec; |
6011695d TM |
659 | |
660 | dp->dl_stid.sc_free = nfs4_free_deleg; | |
2a74aba7 BF |
661 | /* |
662 | * delegation seqid's are never incremented. The 4.1 special | |
6136d2b4 BF |
663 | * meaning of seqid 0 isn't meaningful, really, but let's avoid |
664 | * 0 anyway just for consistency and use 1: | |
2a74aba7 BF |
665 | */ |
666 | dp->dl_stid.sc_stateid.si_generation = 1; | |
ea1da636 N |
667 | INIT_LIST_HEAD(&dp->dl_perfile); |
668 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 | 669 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
99c41515 | 670 | dp->dl_type = NFS4_OPEN_DELEGATE_READ; |
02e1215f | 671 | INIT_WORK(&dp->dl_recall.cb_work, nfsd4_run_cb_recall); |
1da177e4 | 672 | return dp; |
02a3508d TM |
673 | out_dec: |
674 | atomic_long_dec(&num_delegations); | |
675 | return NULL; | |
1da177e4 LT |
676 | } |
677 | ||
678 | void | |
6011695d | 679 | nfs4_put_stid(struct nfs4_stid *s) |
1da177e4 | 680 | { |
11b9164a | 681 | struct nfs4_file *fp = s->sc_file; |
6011695d TM |
682 | struct nfs4_client *clp = s->sc_client; |
683 | ||
4770d722 JL |
684 | might_lock(&clp->cl_lock); |
685 | ||
b401be22 JL |
686 | if (!atomic_dec_and_lock(&s->sc_count, &clp->cl_lock)) { |
687 | wake_up_all(&close_wq); | |
6011695d | 688 | return; |
b401be22 | 689 | } |
6011695d | 690 | idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id); |
4770d722 | 691 | spin_unlock(&clp->cl_lock); |
6011695d | 692 | s->sc_free(s); |
11b9164a TM |
693 | if (fp) |
694 | put_nfs4_file(fp); | |
1da177e4 LT |
695 | } |
696 | ||
acfdf5c3 | 697 | static void nfs4_put_deleg_lease(struct nfs4_file *fp) |
1da177e4 | 698 | { |
417c6629 JL |
699 | lockdep_assert_held(&state_lock); |
700 | ||
cbf7a75b BF |
701 | if (!fp->fi_lease) |
702 | return; | |
acfdf5c3 BF |
703 | if (atomic_dec_and_test(&fp->fi_delegees)) { |
704 | vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); | |
705 | fp->fi_lease = NULL; | |
4ee63624 | 706 | fput(fp->fi_deleg_file); |
acfdf5c3 BF |
707 | fp->fi_deleg_file = NULL; |
708 | } | |
1da177e4 LT |
709 | } |
710 | ||
6136d2b4 BF |
711 | static void unhash_stid(struct nfs4_stid *s) |
712 | { | |
3abdb607 | 713 | s->sc_type = 0; |
6136d2b4 BF |
714 | } |
715 | ||
931ee56c BH |
716 | static void |
717 | hash_delegation_locked(struct nfs4_delegation *dp, struct nfs4_file *fp) | |
718 | { | |
cdc97505 | 719 | lockdep_assert_held(&state_lock); |
417c6629 | 720 | lockdep_assert_held(&fp->fi_lock); |
931ee56c | 721 | |
67cb1279 | 722 | atomic_inc(&dp->dl_stid.sc_count); |
3fb87d13 | 723 | dp->dl_stid.sc_type = NFS4_DELEG_STID; |
931ee56c BH |
724 | list_add(&dp->dl_perfile, &fp->fi_delegations); |
725 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); | |
726 | } | |
727 | ||
1da177e4 | 728 | static void |
42690676 | 729 | unhash_delegation_locked(struct nfs4_delegation *dp) |
1da177e4 | 730 | { |
11b9164a | 731 | struct nfs4_file *fp = dp->dl_stid.sc_file; |
02e1215f | 732 | |
42690676 JL |
733 | lockdep_assert_held(&state_lock); |
734 | ||
b0fc29d6 | 735 | dp->dl_stid.sc_type = NFS4_CLOSED_DELEG_STID; |
d55a166c JL |
736 | /* Ensure that deleg break won't try to requeue it */ |
737 | ++dp->dl_time; | |
417c6629 | 738 | spin_lock(&fp->fi_lock); |
931ee56c | 739 | list_del_init(&dp->dl_perclnt); |
1da177e4 | 740 | list_del_init(&dp->dl_recall_lru); |
02e1215f JL |
741 | list_del_init(&dp->dl_perfile); |
742 | spin_unlock(&fp->fi_lock); | |
f8338834 | 743 | if (fp) |
02e1215f | 744 | nfs4_put_deleg_lease(fp); |
3bd64a5b BF |
745 | } |
746 | ||
3bd64a5b BF |
747 | static void destroy_delegation(struct nfs4_delegation *dp) |
748 | { | |
42690676 JL |
749 | spin_lock(&state_lock); |
750 | unhash_delegation_locked(dp); | |
751 | spin_unlock(&state_lock); | |
6011695d | 752 | nfs4_put_stid(&dp->dl_stid); |
3bd64a5b BF |
753 | } |
754 | ||
755 | static void revoke_delegation(struct nfs4_delegation *dp) | |
756 | { | |
757 | struct nfs4_client *clp = dp->dl_stid.sc_client; | |
758 | ||
2d4a532d JL |
759 | WARN_ON(!list_empty(&dp->dl_recall_lru)); |
760 | ||
3bd64a5b | 761 | if (clp->cl_minorversion == 0) |
6011695d | 762 | nfs4_put_stid(&dp->dl_stid); |
3bd64a5b | 763 | else { |
3bd64a5b | 764 | dp->dl_stid.sc_type = NFS4_REVOKED_DELEG_STID; |
2d4a532d JL |
765 | spin_lock(&clp->cl_lock); |
766 | list_add(&dp->dl_recall_lru, &clp->cl_revoked); | |
767 | spin_unlock(&clp->cl_lock); | |
3bd64a5b BF |
768 | } |
769 | } | |
770 | ||
1da177e4 LT |
771 | /* |
772 | * SETCLIENTID state | |
773 | */ | |
774 | ||
ddc04c41 BF |
775 | static unsigned int clientid_hashval(u32 id) |
776 | { | |
777 | return id & CLIENT_HASH_MASK; | |
778 | } | |
779 | ||
780 | static unsigned int clientstr_hashval(const char *name) | |
781 | { | |
782 | return opaque_hashval(name, 8) & CLIENT_HASH_MASK; | |
783 | } | |
784 | ||
f9d7562f BF |
785 | /* |
786 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
787 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
788 | * only what share bits are currently in force, but also what | |
789 | * combinations of share bits previous opens have used. This allows us | |
790 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
791 | * return an error if the client attempt to downgrade to a combination | |
792 | * of share bits not explicable by closing some of its previous opens. | |
793 | * | |
794 | * XXX: This enforcement is actually incomplete, since we don't keep | |
795 | * track of access/deny bit combinations; so, e.g., we allow: | |
796 | * | |
797 | * OPEN allow read, deny write | |
798 | * OPEN allow both, deny none | |
799 | * DOWNGRADE allow read, deny none | |
800 | * | |
801 | * which we should reject. | |
802 | */ | |
5ae037e5 JL |
803 | static unsigned int |
804 | bmap_to_share_mode(unsigned long bmap) { | |
f9d7562f | 805 | int i; |
5ae037e5 | 806 | unsigned int access = 0; |
f9d7562f | 807 | |
f9d7562f BF |
808 | for (i = 1; i < 4; i++) { |
809 | if (test_bit(i, &bmap)) | |
5ae037e5 | 810 | access |= i; |
f9d7562f | 811 | } |
5ae037e5 | 812 | return access; |
f9d7562f BF |
813 | } |
814 | ||
82c5ff1b JL |
815 | /* set share access for a given stateid */ |
816 | static inline void | |
817 | set_access(u32 access, struct nfs4_ol_stateid *stp) | |
818 | { | |
c11c591f JL |
819 | unsigned char mask = 1 << access; |
820 | ||
821 | WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH); | |
822 | stp->st_access_bmap |= mask; | |
82c5ff1b JL |
823 | } |
824 | ||
825 | /* clear share access for a given stateid */ | |
826 | static inline void | |
827 | clear_access(u32 access, struct nfs4_ol_stateid *stp) | |
828 | { | |
c11c591f JL |
829 | unsigned char mask = 1 << access; |
830 | ||
831 | WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH); | |
832 | stp->st_access_bmap &= ~mask; | |
82c5ff1b JL |
833 | } |
834 | ||
835 | /* test whether a given stateid has access */ | |
836 | static inline bool | |
837 | test_access(u32 access, struct nfs4_ol_stateid *stp) | |
838 | { | |
c11c591f JL |
839 | unsigned char mask = 1 << access; |
840 | ||
841 | return (bool)(stp->st_access_bmap & mask); | |
82c5ff1b JL |
842 | } |
843 | ||
ce0fc43c JL |
844 | /* set share deny for a given stateid */ |
845 | static inline void | |
c11c591f | 846 | set_deny(u32 deny, struct nfs4_ol_stateid *stp) |
ce0fc43c | 847 | { |
c11c591f JL |
848 | unsigned char mask = 1 << deny; |
849 | ||
850 | WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH); | |
851 | stp->st_deny_bmap |= mask; | |
ce0fc43c JL |
852 | } |
853 | ||
854 | /* clear share deny for a given stateid */ | |
855 | static inline void | |
c11c591f | 856 | clear_deny(u32 deny, struct nfs4_ol_stateid *stp) |
ce0fc43c | 857 | { |
c11c591f JL |
858 | unsigned char mask = 1 << deny; |
859 | ||
860 | WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH); | |
861 | stp->st_deny_bmap &= ~mask; | |
ce0fc43c JL |
862 | } |
863 | ||
864 | /* test whether a given stateid is denying specific access */ | |
865 | static inline bool | |
c11c591f | 866 | test_deny(u32 deny, struct nfs4_ol_stateid *stp) |
ce0fc43c | 867 | { |
c11c591f JL |
868 | unsigned char mask = 1 << deny; |
869 | ||
870 | return (bool)(stp->st_deny_bmap & mask); | |
f9d7562f BF |
871 | } |
872 | ||
873 | static int nfs4_access_to_omode(u32 access) | |
874 | { | |
8f34a430 | 875 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
876 | case NFS4_SHARE_ACCESS_READ: |
877 | return O_RDONLY; | |
878 | case NFS4_SHARE_ACCESS_WRITE: | |
879 | return O_WRONLY; | |
880 | case NFS4_SHARE_ACCESS_BOTH: | |
881 | return O_RDWR; | |
882 | } | |
063b0fb9 BF |
883 | WARN_ON_ONCE(1); |
884 | return O_RDONLY; | |
f9d7562f BF |
885 | } |
886 | ||
baeb4ff0 JL |
887 | /* |
888 | * A stateid that had a deny mode associated with it is being released | |
889 | * or downgraded. Recalculate the deny mode on the file. | |
890 | */ | |
891 | static void | |
892 | recalculate_deny_mode(struct nfs4_file *fp) | |
893 | { | |
894 | struct nfs4_ol_stateid *stp; | |
895 | ||
896 | spin_lock(&fp->fi_lock); | |
897 | fp->fi_share_deny = 0; | |
898 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) | |
899 | fp->fi_share_deny |= bmap_to_share_mode(stp->st_deny_bmap); | |
900 | spin_unlock(&fp->fi_lock); | |
901 | } | |
902 | ||
903 | static void | |
904 | reset_union_bmap_deny(u32 deny, struct nfs4_ol_stateid *stp) | |
905 | { | |
906 | int i; | |
907 | bool change = false; | |
908 | ||
909 | for (i = 1; i < 4; i++) { | |
910 | if ((i & deny) != i) { | |
911 | change = true; | |
912 | clear_deny(i, stp); | |
913 | } | |
914 | } | |
915 | ||
916 | /* Recalculate per-file deny mode if there was a change */ | |
917 | if (change) | |
11b9164a | 918 | recalculate_deny_mode(stp->st_stid.sc_file); |
baeb4ff0 JL |
919 | } |
920 | ||
82c5ff1b JL |
921 | /* release all access and file references for a given stateid */ |
922 | static void | |
923 | release_all_access(struct nfs4_ol_stateid *stp) | |
924 | { | |
925 | int i; | |
11b9164a | 926 | struct nfs4_file *fp = stp->st_stid.sc_file; |
baeb4ff0 JL |
927 | |
928 | if (fp && stp->st_deny_bmap != 0) | |
929 | recalculate_deny_mode(fp); | |
82c5ff1b JL |
930 | |
931 | for (i = 1; i < 4; i++) { | |
932 | if (test_access(i, stp)) | |
11b9164a | 933 | nfs4_file_put_access(stp->st_stid.sc_file, i); |
82c5ff1b JL |
934 | clear_access(i, stp); |
935 | } | |
936 | } | |
937 | ||
6b180f0b JL |
938 | static void nfs4_put_stateowner(struct nfs4_stateowner *sop) |
939 | { | |
a819ecc1 JL |
940 | struct nfs4_client *clp = sop->so_client; |
941 | ||
942 | might_lock(&clp->cl_lock); | |
943 | ||
944 | if (!atomic_dec_and_lock(&sop->so_count, &clp->cl_lock)) | |
6b180f0b | 945 | return; |
8f4b54c5 | 946 | sop->so_ops->so_unhash(sop); |
a819ecc1 | 947 | spin_unlock(&clp->cl_lock); |
6b180f0b JL |
948 | kfree(sop->so_owner.data); |
949 | sop->so_ops->so_free(sop); | |
950 | } | |
951 | ||
4ae098d3 | 952 | static void unhash_ol_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 953 | { |
11b9164a | 954 | struct nfs4_file *fp = stp->st_stid.sc_file; |
1d31a253 | 955 | |
1c755dc1 JL |
956 | lockdep_assert_held(&stp->st_stateowner->so_client->cl_lock); |
957 | ||
1d31a253 | 958 | spin_lock(&fp->fi_lock); |
529d7b2a | 959 | list_del(&stp->st_perfile); |
1d31a253 | 960 | spin_unlock(&fp->fi_lock); |
529d7b2a BF |
961 | list_del(&stp->st_perstateowner); |
962 | } | |
963 | ||
6011695d | 964 | static void nfs4_free_ol_stateid(struct nfs4_stid *stid) |
529d7b2a | 965 | { |
6011695d | 966 | struct nfs4_ol_stateid *stp = openlockstateid(stid); |
4665e2ba | 967 | |
6011695d | 968 | release_all_access(stp); |
d3134b10 JL |
969 | if (stp->st_stateowner) |
970 | nfs4_put_stateowner(stp->st_stateowner); | |
6011695d | 971 | kmem_cache_free(stateid_slab, stid); |
529d7b2a BF |
972 | } |
973 | ||
b49e084d | 974 | static void nfs4_free_lock_stateid(struct nfs4_stid *stid) |
529d7b2a | 975 | { |
b49e084d JL |
976 | struct nfs4_ol_stateid *stp = openlockstateid(stid); |
977 | struct nfs4_lockowner *lo = lockowner(stp->st_stateowner); | |
529d7b2a BF |
978 | struct file *file; |
979 | ||
b49e084d JL |
980 | file = find_any_file(stp->st_stid.sc_file); |
981 | if (file) | |
982 | filp_close(file, (fl_owner_t)lo); | |
983 | nfs4_free_ol_stateid(stid); | |
984 | } | |
985 | ||
2c41beb0 JL |
986 | /* |
987 | * Put the persistent reference to an already unhashed generic stateid, while | |
988 | * holding the cl_lock. If it's the last reference, then put it onto the | |
989 | * reaplist for later destruction. | |
990 | */ | |
991 | static void put_ol_stateid_locked(struct nfs4_ol_stateid *stp, | |
992 | struct list_head *reaplist) | |
993 | { | |
994 | struct nfs4_stid *s = &stp->st_stid; | |
995 | struct nfs4_client *clp = s->sc_client; | |
996 | ||
997 | lockdep_assert_held(&clp->cl_lock); | |
998 | ||
999 | WARN_ON_ONCE(!list_empty(&stp->st_locks)); | |
1000 | ||
1001 | if (!atomic_dec_and_test(&s->sc_count)) { | |
1002 | wake_up_all(&close_wq); | |
1003 | return; | |
1004 | } | |
1005 | ||
1006 | idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id); | |
1007 | list_add(&stp->st_locks, reaplist); | |
1008 | } | |
1009 | ||
3c1c995c | 1010 | static void unhash_lock_stateid(struct nfs4_ol_stateid *stp) |
b49e084d | 1011 | { |
1c755dc1 JL |
1012 | struct nfs4_openowner *oo = openowner(stp->st_openstp->st_stateowner); |
1013 | ||
3c1c995c JL |
1014 | lockdep_assert_held(&oo->oo_owner.so_client->cl_lock); |
1015 | ||
1016 | list_del_init(&stp->st_locks); | |
4ae098d3 | 1017 | unhash_ol_stateid(stp); |
6136d2b4 | 1018 | unhash_stid(&stp->st_stid); |
3c1c995c JL |
1019 | } |
1020 | ||
1021 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) | |
1022 | { | |
1023 | struct nfs4_openowner *oo = openowner(stp->st_openstp->st_stateowner); | |
1024 | ||
1025 | spin_lock(&oo->oo_owner.so_client->cl_lock); | |
1026 | unhash_lock_stateid(stp); | |
1c755dc1 | 1027 | spin_unlock(&oo->oo_owner.so_client->cl_lock); |
6011695d | 1028 | nfs4_put_stid(&stp->st_stid); |
529d7b2a BF |
1029 | } |
1030 | ||
c58c6610 | 1031 | static void unhash_lockowner_locked(struct nfs4_lockowner *lo) |
8f4b54c5 | 1032 | { |
d4f0489f | 1033 | struct nfs4_client *clp = lo->lo_owner.so_client; |
c58c6610 | 1034 | |
d4f0489f | 1035 | lockdep_assert_held(&clp->cl_lock); |
c58c6610 | 1036 | |
8f4b54c5 JL |
1037 | list_del_init(&lo->lo_owner.so_strhash); |
1038 | } | |
1039 | ||
2c41beb0 JL |
1040 | /* |
1041 | * Free a list of generic stateids that were collected earlier after being | |
1042 | * fully unhashed. | |
1043 | */ | |
1044 | static void | |
1045 | free_ol_stateid_reaplist(struct list_head *reaplist) | |
1046 | { | |
1047 | struct nfs4_ol_stateid *stp; | |
1048 | ||
1049 | might_sleep(); | |
1050 | ||
1051 | while (!list_empty(reaplist)) { | |
1052 | stp = list_first_entry(reaplist, struct nfs4_ol_stateid, | |
1053 | st_locks); | |
1054 | list_del(&stp->st_locks); | |
1055 | stp->st_stid.sc_free(&stp->st_stid); | |
1056 | } | |
1057 | } | |
1058 | ||
3c1c995c | 1059 | static void release_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 1060 | { |
d4f0489f | 1061 | struct nfs4_client *clp = lo->lo_owner.so_client; |
dcef0413 | 1062 | struct nfs4_ol_stateid *stp; |
3c1c995c | 1063 | struct list_head reaplist; |
529d7b2a | 1064 | |
3c1c995c | 1065 | INIT_LIST_HEAD(&reaplist); |
c58c6610 | 1066 | |
3c1c995c JL |
1067 | spin_lock(&clp->cl_lock); |
1068 | unhash_lockowner_locked(lo); | |
fe0750e5 BF |
1069 | while (!list_empty(&lo->lo_owner.so_stateids)) { |
1070 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
dcef0413 | 1071 | struct nfs4_ol_stateid, st_perstateowner); |
3c1c995c | 1072 | unhash_lock_stateid(stp); |
2c41beb0 | 1073 | put_ol_stateid_locked(stp, &reaplist); |
529d7b2a | 1074 | } |
d4f0489f | 1075 | spin_unlock(&clp->cl_lock); |
2c41beb0 | 1076 | free_ol_stateid_reaplist(&reaplist); |
6b180f0b | 1077 | nfs4_put_stateowner(&lo->lo_owner); |
529d7b2a BF |
1078 | } |
1079 | ||
d83017f9 JL |
1080 | static void release_open_stateid_locks(struct nfs4_ol_stateid *open_stp, |
1081 | struct list_head *reaplist) | |
3c87b9b7 TM |
1082 | { |
1083 | struct nfs4_ol_stateid *stp; | |
1084 | ||
1085 | while (!list_empty(&open_stp->st_locks)) { | |
1086 | stp = list_entry(open_stp->st_locks.next, | |
1087 | struct nfs4_ol_stateid, st_locks); | |
d83017f9 JL |
1088 | unhash_lock_stateid(stp); |
1089 | put_ol_stateid_locked(stp, reaplist); | |
529d7b2a BF |
1090 | } |
1091 | } | |
1092 | ||
d83017f9 JL |
1093 | static void unhash_open_stateid(struct nfs4_ol_stateid *stp, |
1094 | struct list_head *reaplist) | |
2283963f | 1095 | { |
2c41beb0 JL |
1096 | lockdep_assert_held(&stp->st_stid.sc_client->cl_lock); |
1097 | ||
4ae098d3 | 1098 | unhash_ol_stateid(stp); |
d83017f9 | 1099 | release_open_stateid_locks(stp, reaplist); |
38c387b5 BF |
1100 | } |
1101 | ||
1102 | static void release_open_stateid(struct nfs4_ol_stateid *stp) | |
1103 | { | |
2c41beb0 JL |
1104 | LIST_HEAD(reaplist); |
1105 | ||
1106 | spin_lock(&stp->st_stid.sc_client->cl_lock); | |
d83017f9 | 1107 | unhash_open_stateid(stp, &reaplist); |
2c41beb0 JL |
1108 | put_ol_stateid_locked(stp, &reaplist); |
1109 | spin_unlock(&stp->st_stid.sc_client->cl_lock); | |
1110 | free_ol_stateid_reaplist(&reaplist); | |
2283963f BF |
1111 | } |
1112 | ||
7ffb5880 | 1113 | static void unhash_openowner_locked(struct nfs4_openowner *oo) |
f1d110ca | 1114 | { |
d4f0489f | 1115 | struct nfs4_client *clp = oo->oo_owner.so_client; |
7ffb5880 | 1116 | |
d4f0489f | 1117 | lockdep_assert_held(&clp->cl_lock); |
7ffb5880 | 1118 | |
8f4b54c5 JL |
1119 | list_del_init(&oo->oo_owner.so_strhash); |
1120 | list_del_init(&oo->oo_perclient); | |
f1d110ca BF |
1121 | } |
1122 | ||
f7a4d872 BF |
1123 | static void release_last_closed_stateid(struct nfs4_openowner *oo) |
1124 | { | |
1125 | struct nfs4_ol_stateid *s = oo->oo_last_closed_stid; | |
1126 | ||
1127 | if (s) { | |
d3134b10 | 1128 | list_del_init(&oo->oo_close_lru); |
f7a4d872 | 1129 | oo->oo_last_closed_stid = NULL; |
d3134b10 | 1130 | nfs4_put_stid(&s->st_stid); |
f7a4d872 BF |
1131 | } |
1132 | } | |
1133 | ||
2c41beb0 | 1134 | static void release_openowner(struct nfs4_openowner *oo) |
8f4b54c5 JL |
1135 | { |
1136 | struct nfs4_ol_stateid *stp; | |
d4f0489f | 1137 | struct nfs4_client *clp = oo->oo_owner.so_client; |
2c41beb0 | 1138 | struct list_head reaplist; |
7ffb5880 | 1139 | |
2c41beb0 | 1140 | INIT_LIST_HEAD(&reaplist); |
8f4b54c5 | 1141 | |
2c41beb0 JL |
1142 | spin_lock(&clp->cl_lock); |
1143 | unhash_openowner_locked(oo); | |
8f4b54c5 JL |
1144 | while (!list_empty(&oo->oo_owner.so_stateids)) { |
1145 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
1146 | struct nfs4_ol_stateid, st_perstateowner); | |
d83017f9 | 1147 | unhash_open_stateid(stp, &reaplist); |
2c41beb0 | 1148 | put_ol_stateid_locked(stp, &reaplist); |
8f4b54c5 | 1149 | } |
d4f0489f | 1150 | spin_unlock(&clp->cl_lock); |
2c41beb0 | 1151 | free_ol_stateid_reaplist(&reaplist); |
f7a4d872 | 1152 | release_last_closed_stateid(oo); |
6b180f0b | 1153 | nfs4_put_stateowner(&oo->oo_owner); |
f1d110ca BF |
1154 | } |
1155 | ||
5282fd72 ME |
1156 | static inline int |
1157 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
1158 | { | |
1159 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
1160 | ||
1161 | return sid->sequence % SESSION_HASH_SIZE; | |
1162 | } | |
1163 | ||
8f199b82 | 1164 | #ifdef NFSD_DEBUG |
5282fd72 ME |
1165 | static inline void |
1166 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
1167 | { | |
1168 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
1169 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
1170 | } | |
8f199b82 TM |
1171 | #else |
1172 | static inline void | |
1173 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
1174 | { | |
1175 | } | |
1176 | #endif | |
1177 | ||
9411b1d4 BF |
1178 | /* |
1179 | * Bump the seqid on cstate->replay_owner, and clear replay_owner if it | |
1180 | * won't be used for replay. | |
1181 | */ | |
1182 | void nfsd4_bump_seqid(struct nfsd4_compound_state *cstate, __be32 nfserr) | |
1183 | { | |
1184 | struct nfs4_stateowner *so = cstate->replay_owner; | |
1185 | ||
1186 | if (nfserr == nfserr_replay_me) | |
1187 | return; | |
1188 | ||
1189 | if (!seqid_mutating_err(ntohl(nfserr))) { | |
58fb12e6 | 1190 | nfsd4_cstate_clear_replay(cstate); |
9411b1d4 BF |
1191 | return; |
1192 | } | |
1193 | if (!so) | |
1194 | return; | |
1195 | if (so->so_is_open_owner) | |
1196 | release_last_closed_stateid(openowner(so)); | |
1197 | so->so_seqid++; | |
1198 | return; | |
1199 | } | |
5282fd72 | 1200 | |
ec6b5d7b AA |
1201 | static void |
1202 | gen_sessionid(struct nfsd4_session *ses) | |
1203 | { | |
1204 | struct nfs4_client *clp = ses->se_client; | |
1205 | struct nfsd4_sessionid *sid; | |
1206 | ||
1207 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
1208 | sid->clientid = clp->cl_clientid; | |
1209 | sid->sequence = current_sessionid++; | |
1210 | sid->reserved = 0; | |
1211 | } | |
1212 | ||
1213 | /* | |
a649637c AA |
1214 | * The protocol defines ca_maxresponssize_cached to include the size of |
1215 | * the rpc header, but all we need to cache is the data starting after | |
1216 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
1217 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
1218 | * value that is the number of bytes in our cache plus a few additional | |
1219 | * bytes. In order to stay on the safe side, and not promise more than | |
1220 | * we can cache, those additional bytes must be the minimum possible: 24 | |
1221 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
1222 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
1223 | * for the SEQUENCE op response: | |
1224 | */ | |
1225 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
1226 | ||
557ce264 AA |
1227 | static void |
1228 | free_session_slots(struct nfsd4_session *ses) | |
1229 | { | |
1230 | int i; | |
1231 | ||
1232 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
1233 | kfree(ses->se_slots[i]); | |
1234 | } | |
1235 | ||
a649637c | 1236 | /* |
efe0cb6d BF |
1237 | * We don't actually need to cache the rpc and session headers, so we |
1238 | * can allocate a little less for each slot: | |
1239 | */ | |
55c760cf | 1240 | static inline u32 slot_bytes(struct nfsd4_channel_attrs *ca) |
efe0cb6d | 1241 | { |
55c760cf | 1242 | u32 size; |
efe0cb6d | 1243 | |
55c760cf BF |
1244 | if (ca->maxresp_cached < NFSD_MIN_HDR_SEQ_SZ) |
1245 | size = 0; | |
1246 | else | |
1247 | size = ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
1248 | return size + sizeof(struct nfsd4_slot); | |
5b6feee9 | 1249 | } |
ec6b5d7b | 1250 | |
5b6feee9 BF |
1251 | /* |
1252 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c | 1253 | * re-negotiate active sessions and reduce their slot usage to make |
42b2aa86 | 1254 | * room for new connections. For now we just fail the create session. |
ec6b5d7b | 1255 | */ |
55c760cf | 1256 | static u32 nfsd4_get_drc_mem(struct nfsd4_channel_attrs *ca) |
ec6b5d7b | 1257 | { |
55c760cf BF |
1258 | u32 slotsize = slot_bytes(ca); |
1259 | u32 num = ca->maxreqs; | |
5b6feee9 | 1260 | int avail; |
ec6b5d7b | 1261 | |
5b6feee9 | 1262 | spin_lock(&nfsd_drc_lock); |
697ce9be ZY |
1263 | avail = min((unsigned long)NFSD_MAX_MEM_PER_SESSION, |
1264 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
5b6feee9 BF |
1265 | num = min_t(int, num, avail / slotsize); |
1266 | nfsd_drc_mem_used += num * slotsize; | |
1267 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 1268 | |
5b6feee9 BF |
1269 | return num; |
1270 | } | |
ec6b5d7b | 1271 | |
55c760cf | 1272 | static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs *ca) |
5b6feee9 | 1273 | { |
55c760cf BF |
1274 | int slotsize = slot_bytes(ca); |
1275 | ||
4bd9b0f4 | 1276 | spin_lock(&nfsd_drc_lock); |
55c760cf | 1277 | nfsd_drc_mem_used -= slotsize * ca->maxreqs; |
4bd9b0f4 | 1278 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 1279 | } |
ec6b5d7b | 1280 | |
60810e54 KM |
1281 | static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fattrs, |
1282 | struct nfsd4_channel_attrs *battrs) | |
5b6feee9 | 1283 | { |
60810e54 KM |
1284 | int numslots = fattrs->maxreqs; |
1285 | int slotsize = slot_bytes(fattrs); | |
5b6feee9 BF |
1286 | struct nfsd4_session *new; |
1287 | int mem, i; | |
a649637c | 1288 | |
5b6feee9 BF |
1289 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
1290 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
1291 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 1292 | |
5b6feee9 BF |
1293 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
1294 | if (!new) | |
1295 | return NULL; | |
557ce264 | 1296 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 | 1297 | for (i = 0; i < numslots; i++) { |
55c760cf | 1298 | new->se_slots[i] = kzalloc(slotsize, GFP_KERNEL); |
5b6feee9 | 1299 | if (!new->se_slots[i]) |
557ce264 | 1300 | goto out_free; |
557ce264 | 1301 | } |
60810e54 KM |
1302 | |
1303 | memcpy(&new->se_fchannel, fattrs, sizeof(struct nfsd4_channel_attrs)); | |
1304 | memcpy(&new->se_bchannel, battrs, sizeof(struct nfsd4_channel_attrs)); | |
1305 | ||
5b6feee9 BF |
1306 | return new; |
1307 | out_free: | |
1308 | while (i--) | |
1309 | kfree(new->se_slots[i]); | |
1310 | kfree(new); | |
1311 | return NULL; | |
ec6b5d7b AA |
1312 | } |
1313 | ||
19cf5c02 BF |
1314 | static void free_conn(struct nfsd4_conn *c) |
1315 | { | |
1316 | svc_xprt_put(c->cn_xprt); | |
1317 | kfree(c); | |
1318 | } | |
ec6b5d7b | 1319 | |
19cf5c02 BF |
1320 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
1321 | { | |
1322 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
1323 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 1324 | |
19cf5c02 BF |
1325 | spin_lock(&clp->cl_lock); |
1326 | if (!list_empty(&c->cn_persession)) { | |
1327 | list_del(&c->cn_persession); | |
1328 | free_conn(c); | |
1329 | } | |
eea49806 | 1330 | nfsd4_probe_callback(clp); |
2e4b7239 | 1331 | spin_unlock(&clp->cl_lock); |
19cf5c02 | 1332 | } |
ec6b5d7b | 1333 | |
d29c374c | 1334 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 1335 | { |
c7662518 | 1336 | struct nfsd4_conn *conn; |
ec6b5d7b | 1337 | |
c7662518 BF |
1338 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
1339 | if (!conn) | |
db90681d | 1340 | return NULL; |
c7662518 BF |
1341 | svc_xprt_get(rqstp->rq_xprt); |
1342 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 1343 | conn->cn_flags = flags; |
db90681d BF |
1344 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
1345 | return conn; | |
1346 | } | |
a649637c | 1347 | |
328ead28 BF |
1348 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
1349 | { | |
1350 | conn->cn_session = ses; | |
1351 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
1352 | } |
1353 | ||
db90681d | 1354 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 1355 | { |
db90681d | 1356 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 1357 | |
c7662518 | 1358 | spin_lock(&clp->cl_lock); |
328ead28 | 1359 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 1360 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
1361 | } |
1362 | ||
21b75b01 | 1363 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 1364 | { |
19cf5c02 | 1365 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 1366 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
1367 | } |
1368 | ||
e1ff371f | 1369 | static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses) |
ec6b5d7b | 1370 | { |
21b75b01 | 1371 | int ret; |
ec6b5d7b | 1372 | |
db90681d | 1373 | nfsd4_hash_conn(conn, ses); |
21b75b01 BF |
1374 | ret = nfsd4_register_conn(conn); |
1375 | if (ret) | |
1376 | /* oops; xprt is already down: */ | |
1377 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
57a37144 BF |
1378 | /* We may have gained or lost a callback channel: */ |
1379 | nfsd4_probe_callback_sync(ses->se_client); | |
c7662518 | 1380 | } |
ec6b5d7b | 1381 | |
e1ff371f | 1382 | static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses) |
1d1bc8f2 BF |
1383 | { |
1384 | u32 dir = NFS4_CDFC4_FORE; | |
1385 | ||
e1ff371f | 1386 | if (cses->flags & SESSION4_BACK_CHAN) |
1d1bc8f2 | 1387 | dir |= NFS4_CDFC4_BACK; |
e1ff371f | 1388 | return alloc_conn(rqstp, dir); |
1d1bc8f2 BF |
1389 | } |
1390 | ||
1391 | /* must be called under client_lock */ | |
19cf5c02 | 1392 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 1393 | { |
19cf5c02 BF |
1394 | struct nfs4_client *clp = s->se_client; |
1395 | struct nfsd4_conn *c; | |
ec6b5d7b | 1396 | |
19cf5c02 BF |
1397 | spin_lock(&clp->cl_lock); |
1398 | while (!list_empty(&s->se_conns)) { | |
1399 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
1400 | list_del_init(&c->cn_persession); | |
1401 | spin_unlock(&clp->cl_lock); | |
557ce264 | 1402 | |
19cf5c02 BF |
1403 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
1404 | free_conn(c); | |
ec6b5d7b | 1405 | |
19cf5c02 BF |
1406 | spin_lock(&clp->cl_lock); |
1407 | } | |
1408 | spin_unlock(&clp->cl_lock); | |
c7662518 | 1409 | } |
ec6b5d7b | 1410 | |
1377b69e BF |
1411 | static void __free_session(struct nfsd4_session *ses) |
1412 | { | |
1377b69e BF |
1413 | free_session_slots(ses); |
1414 | kfree(ses); | |
1415 | } | |
1416 | ||
66b2b9b2 | 1417 | static void free_session(struct nfsd4_session *ses) |
c7662518 | 1418 | { |
19cf5c02 | 1419 | nfsd4_del_conns(ses); |
55c760cf | 1420 | nfsd4_put_drc_mem(&ses->se_fchannel); |
1377b69e | 1421 | __free_session(ses); |
c7662518 BF |
1422 | } |
1423 | ||
135ae827 | 1424 | static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
a827bcb2 | 1425 | { |
a827bcb2 | 1426 | int idx; |
1872de0e | 1427 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
a827bcb2 | 1428 | |
ec6b5d7b AA |
1429 | new->se_client = clp; |
1430 | gen_sessionid(new); | |
ec6b5d7b | 1431 | |
c7662518 BF |
1432 | INIT_LIST_HEAD(&new->se_conns); |
1433 | ||
ac7c46f2 | 1434 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 1435 | new->se_flags = cses->flags; |
8b5ce5cd | 1436 | new->se_cb_prog = cses->callback_prog; |
c6bb3ca2 | 1437 | new->se_cb_sec = cses->cb_sec; |
66b2b9b2 | 1438 | atomic_set(&new->se_ref, 0); |
5b6feee9 | 1439 | idx = hash_sessionid(&new->se_sessionid); |
c9a49628 | 1440 | spin_lock(&nn->client_lock); |
1872de0e | 1441 | list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]); |
4c649378 | 1442 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 1443 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 1444 | spin_unlock(&clp->cl_lock); |
c9a49628 | 1445 | spin_unlock(&nn->client_lock); |
60810e54 | 1446 | |
dcbeaa68 | 1447 | if (cses->flags & SESSION4_BACK_CHAN) { |
edd76786 | 1448 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
1449 | /* |
1450 | * This is a little silly; with sessions there's no real | |
1451 | * use for the callback address. Use the peer address | |
1452 | * as a reasonable default for now, but consider fixing | |
1453 | * the rpc client not to require an address in the | |
1454 | * future: | |
1455 | */ | |
edd76786 BF |
1456 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
1457 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 1458 | } |
ec6b5d7b AA |
1459 | } |
1460 | ||
9089f1b4 | 1461 | /* caller must hold client_lock */ |
5282fd72 | 1462 | static struct nfsd4_session * |
d4e19e70 | 1463 | __find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net) |
5282fd72 ME |
1464 | { |
1465 | struct nfsd4_session *elem; | |
1466 | int idx; | |
1872de0e | 1467 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
5282fd72 ME |
1468 | |
1469 | dump_sessionid(__func__, sessionid); | |
1470 | idx = hash_sessionid(sessionid); | |
5282fd72 | 1471 | /* Search in the appropriate list */ |
1872de0e | 1472 | list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) { |
5282fd72 ME |
1473 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
1474 | NFS4_MAX_SESSIONID_LEN)) { | |
1475 | return elem; | |
1476 | } | |
1477 | } | |
1478 | ||
1479 | dprintk("%s: session not found\n", __func__); | |
1480 | return NULL; | |
1481 | } | |
1482 | ||
d4e19e70 TM |
1483 | static struct nfsd4_session * |
1484 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net, | |
1485 | __be32 *ret) | |
1486 | { | |
1487 | struct nfsd4_session *session; | |
1488 | __be32 status = nfserr_badsession; | |
1489 | ||
1490 | session = __find_in_sessionid_hashtbl(sessionid, net); | |
1491 | if (!session) | |
1492 | goto out; | |
1493 | status = nfsd4_get_session_locked(session); | |
1494 | if (status) | |
1495 | session = NULL; | |
1496 | out: | |
1497 | *ret = status; | |
1498 | return session; | |
1499 | } | |
1500 | ||
9089f1b4 | 1501 | /* caller must hold client_lock */ |
7116ed6b | 1502 | static void |
5282fd72 | 1503 | unhash_session(struct nfsd4_session *ses) |
7116ed6b AA |
1504 | { |
1505 | list_del(&ses->se_hash); | |
4c649378 | 1506 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 1507 | list_del(&ses->se_perclnt); |
4c649378 | 1508 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
1509 | } |
1510 | ||
1da177e4 LT |
1511 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
1512 | static int | |
2c142baa | 1513 | STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn) |
1da177e4 | 1514 | { |
2c142baa | 1515 | if (clid->cl_boot == nn->boot_time) |
1da177e4 | 1516 | return 0; |
60adfc50 | 1517 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
2c142baa | 1518 | clid->cl_boot, clid->cl_id, nn->boot_time); |
1da177e4 LT |
1519 | return 1; |
1520 | } | |
1521 | ||
1522 | /* | |
1523 | * XXX Should we use a slab cache ? | |
1524 | * This type of memory management is somewhat inefficient, but we use it | |
1525 | * anyway since SETCLIENTID is not a common operation. | |
1526 | */ | |
35bba9a3 | 1527 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
1528 | { |
1529 | struct nfs4_client *clp; | |
d4f0489f | 1530 | int i; |
1da177e4 | 1531 | |
35bba9a3 BF |
1532 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
1533 | if (clp == NULL) | |
1534 | return NULL; | |
67114fe6 | 1535 | clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); |
d4f0489f TM |
1536 | if (clp->cl_name.data == NULL) |
1537 | goto err_no_name; | |
1538 | clp->cl_ownerstr_hashtbl = kmalloc(sizeof(struct list_head) * | |
1539 | OWNER_HASH_SIZE, GFP_KERNEL); | |
1540 | if (!clp->cl_ownerstr_hashtbl) | |
1541 | goto err_no_hashtbl; | |
1542 | for (i = 0; i < OWNER_HASH_SIZE; i++) | |
1543 | INIT_LIST_HEAD(&clp->cl_ownerstr_hashtbl[i]); | |
35bba9a3 | 1544 | clp->cl_name.len = name.len; |
5694c93e TM |
1545 | INIT_LIST_HEAD(&clp->cl_sessions); |
1546 | idr_init(&clp->cl_stateids); | |
1547 | atomic_set(&clp->cl_refcount, 0); | |
1548 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; | |
1549 | INIT_LIST_HEAD(&clp->cl_idhash); | |
1550 | INIT_LIST_HEAD(&clp->cl_openowners); | |
1551 | INIT_LIST_HEAD(&clp->cl_delegations); | |
1552 | INIT_LIST_HEAD(&clp->cl_lru); | |
1553 | INIT_LIST_HEAD(&clp->cl_callbacks); | |
1554 | INIT_LIST_HEAD(&clp->cl_revoked); | |
1555 | spin_lock_init(&clp->cl_lock); | |
1556 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1da177e4 | 1557 | return clp; |
d4f0489f TM |
1558 | err_no_hashtbl: |
1559 | kfree(clp->cl_name.data); | |
1560 | err_no_name: | |
1561 | kfree(clp); | |
1562 | return NULL; | |
1da177e4 LT |
1563 | } |
1564 | ||
4dd86e15 | 1565 | static void |
1da177e4 LT |
1566 | free_client(struct nfs4_client *clp) |
1567 | { | |
792c95dd BF |
1568 | while (!list_empty(&clp->cl_sessions)) { |
1569 | struct nfsd4_session *ses; | |
1570 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
1571 | se_perclnt); | |
1572 | list_del(&ses->se_perclnt); | |
66b2b9b2 BF |
1573 | WARN_ON_ONCE(atomic_read(&ses->se_ref)); |
1574 | free_session(ses); | |
792c95dd | 1575 | } |
4cb57e30 | 1576 | rpc_destroy_wait_queue(&clp->cl_cb_waitq); |
03a4e1f6 | 1577 | free_svc_cred(&clp->cl_cred); |
d4f0489f | 1578 | kfree(clp->cl_ownerstr_hashtbl); |
1da177e4 | 1579 | kfree(clp->cl_name.data); |
2d32b29a | 1580 | idr_destroy(&clp->cl_stateids); |
1da177e4 LT |
1581 | kfree(clp); |
1582 | } | |
1583 | ||
84d38ac9 | 1584 | /* must be called under the client_lock */ |
4beb345b | 1585 | static void |
84d38ac9 BH |
1586 | unhash_client_locked(struct nfs4_client *clp) |
1587 | { | |
4beb345b | 1588 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
792c95dd BF |
1589 | struct nfsd4_session *ses; |
1590 | ||
4beb345b TM |
1591 | /* Mark the client as expired! */ |
1592 | clp->cl_time = 0; | |
1593 | /* Make it invisible */ | |
1594 | if (!list_empty(&clp->cl_idhash)) { | |
1595 | list_del_init(&clp->cl_idhash); | |
1596 | if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) | |
1597 | rb_erase(&clp->cl_namenode, &nn->conf_name_tree); | |
1598 | else | |
1599 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); | |
1600 | } | |
1601 | list_del_init(&clp->cl_lru); | |
4c649378 | 1602 | spin_lock(&clp->cl_lock); |
792c95dd BF |
1603 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
1604 | list_del_init(&ses->se_hash); | |
4c649378 | 1605 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
1606 | } |
1607 | ||
1da177e4 | 1608 | static void |
4beb345b TM |
1609 | unhash_client(struct nfs4_client *clp) |
1610 | { | |
1611 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
1612 | ||
1613 | spin_lock(&nn->client_lock); | |
1614 | unhash_client_locked(clp); | |
1615 | spin_unlock(&nn->client_lock); | |
1616 | } | |
1617 | ||
1618 | static void | |
1619 | __destroy_client(struct nfs4_client *clp) | |
1da177e4 | 1620 | { |
fe0750e5 | 1621 | struct nfs4_openowner *oo; |
1da177e4 | 1622 | struct nfs4_delegation *dp; |
1da177e4 LT |
1623 | struct list_head reaplist; |
1624 | ||
1da177e4 | 1625 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 1626 | spin_lock(&state_lock); |
ea1da636 N |
1627 | while (!list_empty(&clp->cl_delegations)) { |
1628 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
42690676 JL |
1629 | unhash_delegation_locked(dp); |
1630 | list_add(&dp->dl_recall_lru, &reaplist); | |
1da177e4 | 1631 | } |
cdc97505 | 1632 | spin_unlock(&state_lock); |
1da177e4 LT |
1633 | while (!list_empty(&reaplist)) { |
1634 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
42690676 | 1635 | list_del_init(&dp->dl_recall_lru); |
6011695d | 1636 | nfs4_put_stid(&dp->dl_stid); |
1da177e4 | 1637 | } |
2d4a532d | 1638 | while (!list_empty(&clp->cl_revoked)) { |
956c4fee | 1639 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); |
2d4a532d | 1640 | list_del_init(&dp->dl_recall_lru); |
6011695d | 1641 | nfs4_put_stid(&dp->dl_stid); |
956c4fee | 1642 | } |
ea1da636 | 1643 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 | 1644 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
d3134b10 | 1645 | atomic_inc(&oo->oo_owner.so_count); |
fe0750e5 | 1646 | release_openowner(oo); |
1da177e4 | 1647 | } |
6ff8da08 | 1648 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
1649 | if (clp->cl_cb_conn.cb_xprt) |
1650 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
221a6876 | 1651 | free_client(clp); |
1da177e4 LT |
1652 | } |
1653 | ||
4beb345b TM |
1654 | static void |
1655 | destroy_client(struct nfs4_client *clp) | |
1656 | { | |
1657 | unhash_client(clp); | |
1658 | __destroy_client(clp); | |
1659 | } | |
1660 | ||
0d22f68f BF |
1661 | static void expire_client(struct nfs4_client *clp) |
1662 | { | |
4beb345b | 1663 | unhash_client(clp); |
0d22f68f | 1664 | nfsd4_client_record_remove(clp); |
4beb345b | 1665 | __destroy_client(clp); |
0d22f68f BF |
1666 | } |
1667 | ||
35bba9a3 BF |
1668 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
1669 | { | |
1670 | memcpy(target->cl_verifier.data, source->data, | |
1671 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
1672 | } |
1673 | ||
35bba9a3 BF |
1674 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
1675 | { | |
1da177e4 LT |
1676 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
1677 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
1678 | } | |
1679 | ||
03a4e1f6 | 1680 | static int copy_cred(struct svc_cred *target, struct svc_cred *source) |
35bba9a3 | 1681 | { |
03a4e1f6 BF |
1682 | if (source->cr_principal) { |
1683 | target->cr_principal = | |
1684 | kstrdup(source->cr_principal, GFP_KERNEL); | |
1685 | if (target->cr_principal == NULL) | |
1686 | return -ENOMEM; | |
1687 | } else | |
1688 | target->cr_principal = NULL; | |
d5497fc6 | 1689 | target->cr_flavor = source->cr_flavor; |
1da177e4 LT |
1690 | target->cr_uid = source->cr_uid; |
1691 | target->cr_gid = source->cr_gid; | |
1692 | target->cr_group_info = source->cr_group_info; | |
1693 | get_group_info(target->cr_group_info); | |
0dc1531a BF |
1694 | target->cr_gss_mech = source->cr_gss_mech; |
1695 | if (source->cr_gss_mech) | |
1696 | gss_mech_get(source->cr_gss_mech); | |
03a4e1f6 | 1697 | return 0; |
1da177e4 LT |
1698 | } |
1699 | ||
ac55fdc4 JL |
1700 | static long long |
1701 | compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2) | |
1702 | { | |
1703 | long long res; | |
1704 | ||
1705 | res = o1->len - o2->len; | |
1706 | if (res) | |
1707 | return res; | |
1708 | return (long long)memcmp(o1->data, o2->data, o1->len); | |
1709 | } | |
1710 | ||
35bba9a3 | 1711 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 1712 | { |
a55370a3 | 1713 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
1714 | } |
1715 | ||
1716 | static int | |
599e0a22 BF |
1717 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1718 | { | |
1719 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
1720 | } |
1721 | ||
1722 | static int | |
599e0a22 BF |
1723 | same_clid(clientid_t *cl1, clientid_t *cl2) |
1724 | { | |
1725 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1726 | } |
1727 | ||
8fbba96e BF |
1728 | static bool groups_equal(struct group_info *g1, struct group_info *g2) |
1729 | { | |
1730 | int i; | |
1731 | ||
1732 | if (g1->ngroups != g2->ngroups) | |
1733 | return false; | |
1734 | for (i=0; i<g1->ngroups; i++) | |
6fab8779 | 1735 | if (!gid_eq(GROUP_AT(g1, i), GROUP_AT(g2, i))) |
8fbba96e BF |
1736 | return false; |
1737 | return true; | |
1738 | } | |
1739 | ||
68eb3508 BF |
1740 | /* |
1741 | * RFC 3530 language requires clid_inuse be returned when the | |
1742 | * "principal" associated with a requests differs from that previously | |
1743 | * used. We use uid, gid's, and gss principal string as our best | |
1744 | * approximation. We also don't want to allow non-gss use of a client | |
1745 | * established using gss: in theory cr_principal should catch that | |
1746 | * change, but in practice cr_principal can be null even in the gss case | |
1747 | * since gssd doesn't always pass down a principal string. | |
1748 | */ | |
1749 | static bool is_gss_cred(struct svc_cred *cr) | |
1750 | { | |
1751 | /* Is cr_flavor one of the gss "pseudoflavors"?: */ | |
1752 | return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR); | |
1753 | } | |
1754 | ||
1755 | ||
5559b50a | 1756 | static bool |
599e0a22 BF |
1757 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
1758 | { | |
68eb3508 | 1759 | if ((is_gss_cred(cr1) != is_gss_cred(cr2)) |
6fab8779 EB |
1760 | || (!uid_eq(cr1->cr_uid, cr2->cr_uid)) |
1761 | || (!gid_eq(cr1->cr_gid, cr2->cr_gid)) | |
8fbba96e BF |
1762 | || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) |
1763 | return false; | |
1764 | if (cr1->cr_principal == cr2->cr_principal) | |
1765 | return true; | |
1766 | if (!cr1->cr_principal || !cr2->cr_principal) | |
1767 | return false; | |
5559b50a | 1768 | return 0 == strcmp(cr1->cr_principal, cr2->cr_principal); |
1da177e4 LT |
1769 | } |
1770 | ||
57266a6e BF |
1771 | static bool svc_rqst_integrity_protected(struct svc_rqst *rqstp) |
1772 | { | |
1773 | struct svc_cred *cr = &rqstp->rq_cred; | |
1774 | u32 service; | |
1775 | ||
c4720591 BF |
1776 | if (!cr->cr_gss_mech) |
1777 | return false; | |
57266a6e BF |
1778 | service = gss_pseudoflavor_to_service(cr->cr_gss_mech, cr->cr_flavor); |
1779 | return service == RPC_GSS_SVC_INTEGRITY || | |
1780 | service == RPC_GSS_SVC_PRIVACY; | |
1781 | } | |
1782 | ||
1783 | static bool mach_creds_match(struct nfs4_client *cl, struct svc_rqst *rqstp) | |
1784 | { | |
1785 | struct svc_cred *cr = &rqstp->rq_cred; | |
1786 | ||
1787 | if (!cl->cl_mach_cred) | |
1788 | return true; | |
1789 | if (cl->cl_cred.cr_gss_mech != cr->cr_gss_mech) | |
1790 | return false; | |
1791 | if (!svc_rqst_integrity_protected(rqstp)) | |
1792 | return false; | |
1793 | if (!cr->cr_principal) | |
1794 | return false; | |
1795 | return 0 == strcmp(cl->cl_cred.cr_principal, cr->cr_principal); | |
1796 | } | |
1797 | ||
c212cecf | 1798 | static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn) |
5ec7b46c BF |
1799 | { |
1800 | static u32 current_clientid = 1; | |
1801 | ||
2c142baa | 1802 | clp->cl_clientid.cl_boot = nn->boot_time; |
1da177e4 LT |
1803 | clp->cl_clientid.cl_id = current_clientid++; |
1804 | } | |
1805 | ||
deda2faa BF |
1806 | static void gen_confirm(struct nfs4_client *clp) |
1807 | { | |
ab4684d1 | 1808 | __be32 verf[2]; |
deda2faa | 1809 | static u32 i; |
1da177e4 | 1810 | |
f419992c JL |
1811 | /* |
1812 | * This is opaque to client, so no need to byte-swap. Use | |
1813 | * __force to keep sparse happy | |
1814 | */ | |
1815 | verf[0] = (__force __be32)get_seconds(); | |
1816 | verf[1] = (__force __be32)i++; | |
ab4684d1 | 1817 | memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); |
1da177e4 LT |
1818 | } |
1819 | ||
4770d722 JL |
1820 | static struct nfs4_stid * |
1821 | find_stateid_locked(struct nfs4_client *cl, stateid_t *t) | |
4581d140 | 1822 | { |
3abdb607 BF |
1823 | struct nfs4_stid *ret; |
1824 | ||
1825 | ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id); | |
1826 | if (!ret || !ret->sc_type) | |
1827 | return NULL; | |
1828 | return ret; | |
4d71ab87 BF |
1829 | } |
1830 | ||
4770d722 JL |
1831 | static struct nfs4_stid * |
1832 | find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) | |
f459e453 BF |
1833 | { |
1834 | struct nfs4_stid *s; | |
4d71ab87 | 1835 | |
4770d722 JL |
1836 | spin_lock(&cl->cl_lock); |
1837 | s = find_stateid_locked(cl, t); | |
2d3f9668 TM |
1838 | if (s != NULL) { |
1839 | if (typemask & s->sc_type) | |
1840 | atomic_inc(&s->sc_count); | |
1841 | else | |
1842 | s = NULL; | |
1843 | } | |
4770d722 JL |
1844 | spin_unlock(&cl->cl_lock); |
1845 | return s; | |
4581d140 BF |
1846 | } |
1847 | ||
2216d449 | 1848 | static struct nfs4_client *create_client(struct xdr_netobj name, |
b09333c4 RL |
1849 | struct svc_rqst *rqstp, nfs4_verifier *verf) |
1850 | { | |
1851 | struct nfs4_client *clp; | |
1852 | struct sockaddr *sa = svc_addr(rqstp); | |
03a4e1f6 | 1853 | int ret; |
c212cecf | 1854 | struct net *net = SVC_NET(rqstp); |
b09333c4 RL |
1855 | |
1856 | clp = alloc_client(name); | |
1857 | if (clp == NULL) | |
1858 | return NULL; | |
1859 | ||
03a4e1f6 BF |
1860 | ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); |
1861 | if (ret) { | |
03a4e1f6 | 1862 | free_client(clp); |
03a4e1f6 | 1863 | return NULL; |
b09333c4 | 1864 | } |
02e1215f | 1865 | INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_run_cb_null); |
07cd4909 | 1866 | clp->cl_time = get_seconds(); |
b09333c4 | 1867 | clear_bit(0, &clp->cl_cb_slot_busy); |
b09333c4 RL |
1868 | copy_verf(clp, verf); |
1869 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
b09333c4 | 1870 | gen_confirm(clp); |
edd76786 | 1871 | clp->cl_cb_session = NULL; |
c212cecf | 1872 | clp->net = net; |
b09333c4 RL |
1873 | return clp; |
1874 | } | |
1875 | ||
fd39ca9a | 1876 | static void |
ac55fdc4 JL |
1877 | add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root) |
1878 | { | |
1879 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
1880 | struct nfs4_client *clp; | |
1881 | ||
1882 | while (*new) { | |
1883 | clp = rb_entry(*new, struct nfs4_client, cl_namenode); | |
1884 | parent = *new; | |
1885 | ||
1886 | if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0) | |
1887 | new = &((*new)->rb_left); | |
1888 | else | |
1889 | new = &((*new)->rb_right); | |
1890 | } | |
1891 | ||
1892 | rb_link_node(&new_clp->cl_namenode, parent, new); | |
1893 | rb_insert_color(&new_clp->cl_namenode, root); | |
1894 | } | |
1895 | ||
1896 | static struct nfs4_client * | |
1897 | find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root) | |
1898 | { | |
1899 | long long cmp; | |
1900 | struct rb_node *node = root->rb_node; | |
1901 | struct nfs4_client *clp; | |
1902 | ||
1903 | while (node) { | |
1904 | clp = rb_entry(node, struct nfs4_client, cl_namenode); | |
1905 | cmp = compare_blob(&clp->cl_name, name); | |
1906 | if (cmp > 0) | |
1907 | node = node->rb_left; | |
1908 | else if (cmp < 0) | |
1909 | node = node->rb_right; | |
1910 | else | |
1911 | return clp; | |
1912 | } | |
1913 | return NULL; | |
1914 | } | |
1915 | ||
1916 | static void | |
1917 | add_to_unconfirmed(struct nfs4_client *clp) | |
1da177e4 LT |
1918 | { |
1919 | unsigned int idhashval; | |
0a7ec377 | 1920 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 1921 | |
ac55fdc4 | 1922 | clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
a99454aa | 1923 | add_clp_to_name_tree(clp, &nn->unconf_name_tree); |
1da177e4 | 1924 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
0a7ec377 | 1925 | list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]); |
36acb66b | 1926 | renew_client(clp); |
1da177e4 LT |
1927 | } |
1928 | ||
fd39ca9a | 1929 | static void |
1da177e4 LT |
1930 | move_to_confirmed(struct nfs4_client *clp) |
1931 | { | |
1932 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
8daae4dc | 1933 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 LT |
1934 | |
1935 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
8daae4dc | 1936 | list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]); |
a99454aa | 1937 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
382a62e7 | 1938 | add_clp_to_name_tree(clp, &nn->conf_name_tree); |
ac55fdc4 | 1939 | set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
1da177e4 LT |
1940 | renew_client(clp); |
1941 | } | |
1942 | ||
1943 | static struct nfs4_client * | |
bfa85e83 | 1944 | find_client_in_id_table(struct list_head *tbl, clientid_t *clid, bool sessions) |
1da177e4 LT |
1945 | { |
1946 | struct nfs4_client *clp; | |
1947 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1948 | ||
bfa85e83 | 1949 | list_for_each_entry(clp, &tbl[idhashval], cl_idhash) { |
a50d2ad1 | 1950 | if (same_clid(&clp->cl_clientid, clid)) { |
d15c077e BF |
1951 | if ((bool)clp->cl_minorversion != sessions) |
1952 | return NULL; | |
a50d2ad1 | 1953 | renew_client(clp); |
1da177e4 | 1954 | return clp; |
a50d2ad1 | 1955 | } |
1da177e4 LT |
1956 | } |
1957 | return NULL; | |
1958 | } | |
1959 | ||
bfa85e83 BF |
1960 | static struct nfs4_client * |
1961 | find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) | |
1962 | { | |
1963 | struct list_head *tbl = nn->conf_id_hashtbl; | |
1964 | ||
1965 | return find_client_in_id_table(tbl, clid, sessions); | |
1966 | } | |
1967 | ||
1da177e4 | 1968 | static struct nfs4_client * |
0a7ec377 | 1969 | find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
1da177e4 | 1970 | { |
bfa85e83 | 1971 | struct list_head *tbl = nn->unconf_id_hashtbl; |
1da177e4 | 1972 | |
bfa85e83 | 1973 | return find_client_in_id_table(tbl, clid, sessions); |
1da177e4 LT |
1974 | } |
1975 | ||
6e5f15c9 | 1976 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 1977 | { |
6e5f15c9 | 1978 | return clp->cl_exchange_flags != 0; |
e203d506 | 1979 | } |
a1bcecd2 | 1980 | |
28ce6054 | 1981 | static struct nfs4_client * |
382a62e7 | 1982 | find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 1983 | { |
382a62e7 | 1984 | return find_clp_in_name_tree(name, &nn->conf_name_tree); |
28ce6054 N |
1985 | } |
1986 | ||
1987 | static struct nfs4_client * | |
a99454aa | 1988 | find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 1989 | { |
a99454aa | 1990 | return find_clp_in_name_tree(name, &nn->unconf_name_tree); |
28ce6054 N |
1991 | } |
1992 | ||
fd39ca9a | 1993 | static void |
6f3d772f | 1994 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 1995 | { |
07263f1e | 1996 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
1997 | struct sockaddr *sa = svc_addr(rqstp); |
1998 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
1999 | unsigned short expected_family; |
2000 | ||
2001 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
2002 | if (se->se_callback_netid_len == 3 && | |
2003 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
2004 | expected_family = AF_INET; | |
2005 | else if (se->se_callback_netid_len == 4 && | |
2006 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
2007 | expected_family = AF_INET6; | |
2008 | else | |
1da177e4 LT |
2009 | goto out_err; |
2010 | ||
c212cecf | 2011 | conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val, |
aa9a4ec7 | 2012 | se->se_callback_addr_len, |
07263f1e BF |
2013 | (struct sockaddr *)&conn->cb_addr, |
2014 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 2015 | |
07263f1e | 2016 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 2017 | goto out_err; |
aa9a4ec7 | 2018 | |
07263f1e BF |
2019 | if (conn->cb_addr.ss_family == AF_INET6) |
2020 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 2021 | |
07263f1e BF |
2022 | conn->cb_prog = se->se_callback_prog; |
2023 | conn->cb_ident = se->se_callback_ident; | |
849a1cf1 | 2024 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
1da177e4 LT |
2025 | return; |
2026 | out_err: | |
07263f1e BF |
2027 | conn->cb_addr.ss_family = AF_UNSPEC; |
2028 | conn->cb_addrlen = 0; | |
849823c5 | 2029 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
2030 | "will not receive delegations\n", |
2031 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
2032 | ||
1da177e4 LT |
2033 | return; |
2034 | } | |
2035 | ||
074fe897 | 2036 | /* |
067e1ace | 2037 | * Cache a reply. nfsd4_check_resp_size() has bounded the cache size. |
074fe897 | 2038 | */ |
b607664e | 2039 | static void |
074fe897 | 2040 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) |
074fe897 | 2041 | { |
f5236013 | 2042 | struct xdr_buf *buf = resp->xdr.buf; |
557ce264 AA |
2043 | struct nfsd4_slot *slot = resp->cstate.slot; |
2044 | unsigned int base; | |
074fe897 | 2045 | |
557ce264 | 2046 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 2047 | |
557ce264 AA |
2048 | slot->sl_opcnt = resp->opcnt; |
2049 | slot->sl_status = resp->cstate.status; | |
074fe897 | 2050 | |
bf5c43c8 | 2051 | slot->sl_flags |= NFSD4_SLOT_INITIALIZED; |
bf864a31 | 2052 | if (nfsd4_not_cached(resp)) { |
557ce264 | 2053 | slot->sl_datalen = 0; |
bf864a31 | 2054 | return; |
074fe897 | 2055 | } |
f5236013 BF |
2056 | base = resp->cstate.data_offset; |
2057 | slot->sl_datalen = buf->len - base; | |
2058 | if (read_bytes_from_xdr_buf(buf, base, slot->sl_data, slot->sl_datalen)) | |
557ce264 AA |
2059 | WARN("%s: sessions DRC could not cache compound\n", __func__); |
2060 | return; | |
074fe897 AA |
2061 | } |
2062 | ||
2063 | /* | |
abfabf8c AA |
2064 | * Encode the replay sequence operation from the slot values. |
2065 | * If cachethis is FALSE encode the uncached rep error on the next | |
2066 | * operation which sets resp->p and increments resp->opcnt for | |
2067 | * nfs4svc_encode_compoundres. | |
074fe897 | 2068 | * |
074fe897 | 2069 | */ |
abfabf8c AA |
2070 | static __be32 |
2071 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
2072 | struct nfsd4_compoundres *resp) | |
074fe897 | 2073 | { |
abfabf8c AA |
2074 | struct nfsd4_op *op; |
2075 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 2076 | |
abfabf8c AA |
2077 | /* Encode the replayed sequence operation */ |
2078 | op = &args->ops[resp->opcnt - 1]; | |
2079 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 2080 | |
abfabf8c | 2081 | /* Return nfserr_retry_uncached_rep in next operation. */ |
73e79482 | 2082 | if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) { |
abfabf8c AA |
2083 | op = &args->ops[resp->opcnt++]; |
2084 | op->status = nfserr_retry_uncached_rep; | |
2085 | nfsd4_encode_operation(resp, op); | |
074fe897 | 2086 | } |
abfabf8c | 2087 | return op->status; |
074fe897 AA |
2088 | } |
2089 | ||
2090 | /* | |
557ce264 AA |
2091 | * The sequence operation is not cached because we can use the slot and |
2092 | * session values. | |
074fe897 | 2093 | */ |
3ca2eb98 | 2094 | static __be32 |
bf864a31 AA |
2095 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
2096 | struct nfsd4_sequence *seq) | |
074fe897 | 2097 | { |
557ce264 | 2098 | struct nfsd4_slot *slot = resp->cstate.slot; |
f5236013 BF |
2099 | struct xdr_stream *xdr = &resp->xdr; |
2100 | __be32 *p; | |
074fe897 AA |
2101 | __be32 status; |
2102 | ||
557ce264 | 2103 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 2104 | |
abfabf8c | 2105 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); |
0da7b19c | 2106 | if (status) |
abfabf8c | 2107 | return status; |
074fe897 | 2108 | |
f5236013 BF |
2109 | p = xdr_reserve_space(xdr, slot->sl_datalen); |
2110 | if (!p) { | |
2111 | WARN_ON_ONCE(1); | |
2112 | return nfserr_serverfault; | |
2113 | } | |
2114 | xdr_encode_opaque_fixed(p, slot->sl_data, slot->sl_datalen); | |
2115 | xdr_commit_encode(xdr); | |
074fe897 | 2116 | |
557ce264 | 2117 | resp->opcnt = slot->sl_opcnt; |
f5236013 | 2118 | return slot->sl_status; |
074fe897 AA |
2119 | } |
2120 | ||
0733d213 AA |
2121 | /* |
2122 | * Set the exchange_id flags returned by the server. | |
2123 | */ | |
2124 | static void | |
2125 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
2126 | { | |
2127 | /* pNFS is not supported */ | |
2128 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
2129 | ||
2130 | /* Referrals are supported, Migration is not. */ | |
2131 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
2132 | ||
2133 | /* set the wire flags to return to client. */ | |
2134 | clid->flags = new->cl_exchange_flags; | |
2135 | } | |
2136 | ||
631fc9ea BF |
2137 | static bool client_has_state(struct nfs4_client *clp) |
2138 | { | |
2139 | /* | |
2140 | * Note clp->cl_openowners check isn't quite right: there's no | |
2141 | * need to count owners without stateid's. | |
2142 | * | |
2143 | * Also note we should probably be using this in 4.0 case too. | |
2144 | */ | |
6eccece9 BF |
2145 | return !list_empty(&clp->cl_openowners) |
2146 | || !list_empty(&clp->cl_delegations) | |
2147 | || !list_empty(&clp->cl_sessions); | |
631fc9ea BF |
2148 | } |
2149 | ||
069b6ad4 AA |
2150 | __be32 |
2151 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
2152 | struct nfsd4_compound_state *cstate, | |
2153 | struct nfsd4_exchange_id *exid) | |
2154 | { | |
0733d213 | 2155 | struct nfs4_client *unconf, *conf, *new; |
57b7b43b | 2156 | __be32 status; |
363168b4 | 2157 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 2158 | nfs4_verifier verf = exid->verifier; |
363168b4 | 2159 | struct sockaddr *sa = svc_addr(rqstp); |
83e08fd4 | 2160 | bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; |
c212cecf | 2161 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
0733d213 | 2162 | |
363168b4 | 2163 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 2164 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 2165 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 2166 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 2167 | addr_str, exid->flags, exid->spa_how); |
0733d213 | 2168 | |
a084daf5 | 2169 | if (exid->flags & ~EXCHGID4_FLAG_MASK_A) |
0733d213 AA |
2170 | return nfserr_inval; |
2171 | ||
0733d213 | 2172 | switch (exid->spa_how) { |
57266a6e BF |
2173 | case SP4_MACH_CRED: |
2174 | if (!svc_rqst_integrity_protected(rqstp)) | |
2175 | return nfserr_inval; | |
0733d213 AA |
2176 | case SP4_NONE: |
2177 | break; | |
063b0fb9 BF |
2178 | default: /* checked by xdr code */ |
2179 | WARN_ON_ONCE(1); | |
0733d213 | 2180 | case SP4_SSV: |
dd30333c | 2181 | return nfserr_encr_alg_unsupp; |
0733d213 AA |
2182 | } |
2183 | ||
2dbb269d | 2184 | /* Cases below refer to rfc 5661 section 18.35.4: */ |
0733d213 | 2185 | nfs4_lock_state(); |
382a62e7 | 2186 | conf = find_confirmed_client_by_name(&exid->clname, nn); |
0733d213 | 2187 | if (conf) { |
83e08fd4 BF |
2188 | bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); |
2189 | bool verfs_match = same_verf(&verf, &conf->cl_verifier); | |
2190 | ||
136e658d BF |
2191 | if (update) { |
2192 | if (!clp_used_exchangeid(conf)) { /* buggy client */ | |
2dbb269d | 2193 | status = nfserr_inval; |
1a308118 BF |
2194 | goto out; |
2195 | } | |
57266a6e BF |
2196 | if (!mach_creds_match(conf, rqstp)) { |
2197 | status = nfserr_wrong_cred; | |
2198 | goto out; | |
2199 | } | |
136e658d | 2200 | if (!creds_match) { /* case 9 */ |
ea236d07 | 2201 | status = nfserr_perm; |
136e658d BF |
2202 | goto out; |
2203 | } | |
2204 | if (!verfs_match) { /* case 8 */ | |
0733d213 AA |
2205 | status = nfserr_not_same; |
2206 | goto out; | |
2207 | } | |
136e658d BF |
2208 | /* case 6 */ |
2209 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
2210 | new = conf; | |
2211 | goto out_copy; | |
0733d213 | 2212 | } |
136e658d | 2213 | if (!creds_match) { /* case 3 */ |
631fc9ea BF |
2214 | if (client_has_state(conf)) { |
2215 | status = nfserr_clid_inuse; | |
0733d213 AA |
2216 | goto out; |
2217 | } | |
2218 | expire_client(conf); | |
2219 | goto out_new; | |
2220 | } | |
136e658d | 2221 | if (verfs_match) { /* case 2 */ |
0f1ba0ef | 2222 | conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; |
136e658d BF |
2223 | new = conf; |
2224 | goto out_copy; | |
2225 | } | |
2226 | /* case 5, client reboot */ | |
136e658d | 2227 | goto out_new; |
6ddbbbfe MS |
2228 | } |
2229 | ||
2dbb269d | 2230 | if (update) { /* case 7 */ |
6ddbbbfe MS |
2231 | status = nfserr_noent; |
2232 | goto out; | |
0733d213 AA |
2233 | } |
2234 | ||
a99454aa | 2235 | unconf = find_unconfirmed_client_by_name(&exid->clname, nn); |
2dbb269d | 2236 | if (unconf) /* case 4, possible retry or client restart */ |
0733d213 | 2237 | expire_client(unconf); |
0733d213 | 2238 | |
2dbb269d | 2239 | /* case 1 (normal case) */ |
0733d213 | 2240 | out_new: |
2216d449 | 2241 | new = create_client(exid->clname, rqstp, &verf); |
0733d213 | 2242 | if (new == NULL) { |
4731030d | 2243 | status = nfserr_jukebox; |
0733d213 AA |
2244 | goto out; |
2245 | } | |
4f540e29 | 2246 | new->cl_minorversion = cstate->minorversion; |
57266a6e | 2247 | new->cl_mach_cred = (exid->spa_how == SP4_MACH_CRED); |
0733d213 | 2248 | |
c212cecf | 2249 | gen_clid(new, nn); |
ac55fdc4 | 2250 | add_to_unconfirmed(new); |
0733d213 AA |
2251 | out_copy: |
2252 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
2253 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
2254 | ||
778df3f0 | 2255 | exid->seqid = new->cl_cs_slot.sl_seqid + 1; |
0733d213 AA |
2256 | nfsd4_set_ex_flags(new, exid); |
2257 | ||
2258 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
49557cc7 | 2259 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
2260 | status = nfs_ok; |
2261 | ||
2262 | out: | |
2263 | nfs4_unlock_state(); | |
0733d213 | 2264 | return status; |
069b6ad4 AA |
2265 | } |
2266 | ||
57b7b43b | 2267 | static __be32 |
88e588d5 | 2268 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 2269 | { |
88e588d5 AA |
2270 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
2271 | slot_seqid); | |
b85d4c01 BH |
2272 | |
2273 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
2274 | if (slot_inuse) { |
2275 | if (seqid == slot_seqid) | |
b85d4c01 BH |
2276 | return nfserr_jukebox; |
2277 | else | |
2278 | return nfserr_seq_misordered; | |
2279 | } | |
f6d82485 | 2280 | /* Note unsigned 32-bit arithmetic handles wraparound: */ |
88e588d5 | 2281 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 | 2282 | return nfs_ok; |
88e588d5 | 2283 | if (seqid == slot_seqid) |
b85d4c01 | 2284 | return nfserr_replay_cache; |
b85d4c01 BH |
2285 | return nfserr_seq_misordered; |
2286 | } | |
2287 | ||
49557cc7 AA |
2288 | /* |
2289 | * Cache the create session result into the create session single DRC | |
2290 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
2291 | * Do this for solo or embedded create session operations. | |
2292 | */ | |
2293 | static void | |
2294 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
57b7b43b | 2295 | struct nfsd4_clid_slot *slot, __be32 nfserr) |
49557cc7 AA |
2296 | { |
2297 | slot->sl_status = nfserr; | |
2298 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
2299 | } | |
2300 | ||
2301 | static __be32 | |
2302 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
2303 | struct nfsd4_clid_slot *slot) | |
2304 | { | |
2305 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
2306 | return slot->sl_status; | |
2307 | } | |
2308 | ||
1b74c25b MJ |
2309 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
2310 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
2311 | 1 + /* MIN tag is length with zero, only length */ \ | |
2312 | 3 + /* version, opcount, opcode */ \ | |
2313 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
2314 | /* seqid, slotID, slotID, cache */ \ | |
2315 | 4 ) * sizeof(__be32)) | |
2316 | ||
2317 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
2318 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
2319 | 1 + /* status */ \ | |
2320 | 1 + /* MIN tag is length with zero, only length */ \ | |
2321 | 3 + /* opcount, opcode, opstatus*/ \ | |
2322 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
2323 | /* seqid, slotID, slotID, slotID, status */ \ | |
2324 | 5 ) * sizeof(__be32)) | |
2325 | ||
55c760cf | 2326 | static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs *ca, struct nfsd_net *nn) |
1b74c25b | 2327 | { |
55c760cf BF |
2328 | u32 maxrpc = nn->nfsd_serv->sv_max_mesg; |
2329 | ||
373cd409 BF |
2330 | if (ca->maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ) |
2331 | return nfserr_toosmall; | |
2332 | if (ca->maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ) | |
2333 | return nfserr_toosmall; | |
55c760cf BF |
2334 | ca->headerpadsz = 0; |
2335 | ca->maxreq_sz = min_t(u32, ca->maxreq_sz, maxrpc); | |
2336 | ca->maxresp_sz = min_t(u32, ca->maxresp_sz, maxrpc); | |
2337 | ca->maxops = min_t(u32, ca->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
2338 | ca->maxresp_cached = min_t(u32, ca->maxresp_cached, | |
2339 | NFSD_SLOT_CACHE_SIZE + NFSD_MIN_HDR_SEQ_SZ); | |
2340 | ca->maxreqs = min_t(u32, ca->maxreqs, NFSD_MAX_SLOTS_PER_SESSION); | |
2341 | /* | |
2342 | * Note decreasing slot size below client's request may make it | |
2343 | * difficult for client to function correctly, whereas | |
2344 | * decreasing the number of slots will (just?) affect | |
2345 | * performance. When short on memory we therefore prefer to | |
2346 | * decrease number of slots instead of their size. Clients that | |
2347 | * request larger slots than they need will get poor results: | |
2348 | */ | |
2349 | ca->maxreqs = nfsd4_get_drc_mem(ca); | |
2350 | if (!ca->maxreqs) | |
2351 | return nfserr_jukebox; | |
2352 | ||
373cd409 | 2353 | return nfs_ok; |
1b74c25b MJ |
2354 | } |
2355 | ||
8a891633 KM |
2356 | #define NFSD_CB_MAX_REQ_SZ ((NFS4_enc_cb_recall_sz + \ |
2357 | RPC_MAX_HEADER_WITH_AUTH) * sizeof(__be32)) | |
2358 | #define NFSD_CB_MAX_RESP_SZ ((NFS4_dec_cb_recall_sz + \ | |
2359 | RPC_MAX_REPHEADER_WITH_AUTH) * sizeof(__be32)) | |
2360 | ||
06b332a5 | 2361 | static __be32 check_backchannel_attrs(struct nfsd4_channel_attrs *ca) |
1b74c25b | 2362 | { |
06b332a5 BF |
2363 | ca->headerpadsz = 0; |
2364 | ||
2365 | /* | |
2366 | * These RPC_MAX_HEADER macros are overkill, especially since we | |
2367 | * don't even do gss on the backchannel yet. But this is still | |
2368 | * less than 1k. Tighten up this estimate in the unlikely event | |
2369 | * it turns out to be a problem for some client: | |
2370 | */ | |
8a891633 | 2371 | if (ca->maxreq_sz < NFSD_CB_MAX_REQ_SZ) |
06b332a5 | 2372 | return nfserr_toosmall; |
8a891633 | 2373 | if (ca->maxresp_sz < NFSD_CB_MAX_RESP_SZ) |
06b332a5 BF |
2374 | return nfserr_toosmall; |
2375 | ca->maxresp_cached = 0; | |
2376 | if (ca->maxops < 2) | |
2377 | return nfserr_toosmall; | |
2378 | ||
2379 | return nfs_ok; | |
1b74c25b MJ |
2380 | } |
2381 | ||
b78724b7 BF |
2382 | static __be32 nfsd4_check_cb_sec(struct nfsd4_cb_sec *cbs) |
2383 | { | |
2384 | switch (cbs->flavor) { | |
2385 | case RPC_AUTH_NULL: | |
2386 | case RPC_AUTH_UNIX: | |
2387 | return nfs_ok; | |
2388 | default: | |
2389 | /* | |
2390 | * GSS case: the spec doesn't allow us to return this | |
2391 | * error. But it also doesn't allow us not to support | |
2392 | * GSS. | |
2393 | * I'd rather this fail hard than return some error the | |
2394 | * client might think it can already handle: | |
2395 | */ | |
2396 | return nfserr_encr_alg_unsupp; | |
2397 | } | |
2398 | } | |
2399 | ||
069b6ad4 AA |
2400 | __be32 |
2401 | nfsd4_create_session(struct svc_rqst *rqstp, | |
2402 | struct nfsd4_compound_state *cstate, | |
2403 | struct nfsd4_create_session *cr_ses) | |
2404 | { | |
363168b4 | 2405 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 2406 | struct nfs4_client *conf, *unconf; |
ac7c46f2 | 2407 | struct nfsd4_session *new; |
81f0b2a4 | 2408 | struct nfsd4_conn *conn; |
49557cc7 | 2409 | struct nfsd4_clid_slot *cs_slot = NULL; |
57b7b43b | 2410 | __be32 status = 0; |
8daae4dc | 2411 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
ec6b5d7b | 2412 | |
a62573dc MJ |
2413 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
2414 | return nfserr_inval; | |
b78724b7 BF |
2415 | status = nfsd4_check_cb_sec(&cr_ses->cb_sec); |
2416 | if (status) | |
2417 | return status; | |
55c760cf | 2418 | status = check_forechannel_attrs(&cr_ses->fore_channel, nn); |
06b332a5 BF |
2419 | if (status) |
2420 | return status; | |
2421 | status = check_backchannel_attrs(&cr_ses->back_channel); | |
373cd409 | 2422 | if (status) |
f403e450 | 2423 | goto out_release_drc_mem; |
81f0b2a4 | 2424 | status = nfserr_jukebox; |
60810e54 | 2425 | new = alloc_session(&cr_ses->fore_channel, &cr_ses->back_channel); |
55c760cf BF |
2426 | if (!new) |
2427 | goto out_release_drc_mem; | |
81f0b2a4 BF |
2428 | conn = alloc_conn_from_crses(rqstp, cr_ses); |
2429 | if (!conn) | |
2430 | goto out_free_session; | |
a62573dc | 2431 | |
ec6b5d7b | 2432 | nfs4_lock_state(); |
0a7ec377 | 2433 | unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn); |
8daae4dc | 2434 | conf = find_confirmed_client(&cr_ses->clientid, true, nn); |
78389046 | 2435 | WARN_ON_ONCE(conf && unconf); |
ec6b5d7b AA |
2436 | |
2437 | if (conf) { | |
57266a6e BF |
2438 | status = nfserr_wrong_cred; |
2439 | if (!mach_creds_match(conf, rqstp)) | |
2440 | goto out_free_conn; | |
49557cc7 AA |
2441 | cs_slot = &conf->cl_cs_slot; |
2442 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 2443 | if (status == nfserr_replay_cache) { |
49557cc7 | 2444 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
81f0b2a4 | 2445 | goto out_free_conn; |
49557cc7 | 2446 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b | 2447 | status = nfserr_seq_misordered; |
81f0b2a4 | 2448 | goto out_free_conn; |
ec6b5d7b | 2449 | } |
ec6b5d7b | 2450 | } else if (unconf) { |
8f9d3d3b | 2451 | struct nfs4_client *old; |
ec6b5d7b | 2452 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || |
363168b4 | 2453 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b | 2454 | status = nfserr_clid_inuse; |
81f0b2a4 | 2455 | goto out_free_conn; |
ec6b5d7b | 2456 | } |
57266a6e BF |
2457 | status = nfserr_wrong_cred; |
2458 | if (!mach_creds_match(unconf, rqstp)) | |
2459 | goto out_free_conn; | |
49557cc7 AA |
2460 | cs_slot = &unconf->cl_cs_slot; |
2461 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
2462 | if (status) { |
2463 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 2464 | status = nfserr_seq_misordered; |
81f0b2a4 | 2465 | goto out_free_conn; |
ec6b5d7b | 2466 | } |
382a62e7 | 2467 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
221a6876 BF |
2468 | if (old) { |
2469 | status = mark_client_expired(old); | |
2470 | if (status) | |
2471 | goto out_free_conn; | |
8f9d3d3b | 2472 | expire_client(old); |
221a6876 | 2473 | } |
8f9d3d3b | 2474 | move_to_confirmed(unconf); |
ec6b5d7b AA |
2475 | conf = unconf; |
2476 | } else { | |
2477 | status = nfserr_stale_clientid; | |
81f0b2a4 | 2478 | goto out_free_conn; |
ec6b5d7b | 2479 | } |
81f0b2a4 | 2480 | status = nfs_ok; |
408b79bc BF |
2481 | /* |
2482 | * We do not support RDMA or persistent sessions | |
2483 | */ | |
2484 | cr_ses->flags &= ~SESSION4_PERSIST; | |
2485 | cr_ses->flags &= ~SESSION4_RDMA; | |
2486 | ||
81f0b2a4 BF |
2487 | init_session(rqstp, new, conf, cr_ses); |
2488 | nfsd4_init_conn(rqstp, conn, new); | |
2489 | ||
ac7c46f2 | 2490 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, |
ec6b5d7b | 2491 | NFS4_MAX_SESSIONID_LEN); |
86c3e16c | 2492 | cs_slot->sl_seqid++; |
49557cc7 | 2493 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 2494 | |
49557cc7 AA |
2495 | /* cache solo and embedded create sessions under the state lock */ |
2496 | nfsd4_cache_create_session(cr_ses, cs_slot, status); | |
ec6b5d7b | 2497 | nfs4_unlock_state(); |
ec6b5d7b | 2498 | return status; |
81f0b2a4 | 2499 | out_free_conn: |
266533c6 | 2500 | nfs4_unlock_state(); |
81f0b2a4 BF |
2501 | free_conn(conn); |
2502 | out_free_session: | |
2503 | __free_session(new); | |
55c760cf BF |
2504 | out_release_drc_mem: |
2505 | nfsd4_put_drc_mem(&cr_ses->fore_channel); | |
1ca50792 | 2506 | return status; |
069b6ad4 AA |
2507 | } |
2508 | ||
1d1bc8f2 BF |
2509 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
2510 | { | |
2511 | switch (*dir) { | |
2512 | case NFS4_CDFC4_FORE: | |
2513 | case NFS4_CDFC4_BACK: | |
2514 | return nfs_ok; | |
2515 | case NFS4_CDFC4_FORE_OR_BOTH: | |
2516 | case NFS4_CDFC4_BACK_OR_BOTH: | |
2517 | *dir = NFS4_CDFC4_BOTH; | |
2518 | return nfs_ok; | |
2519 | }; | |
2520 | return nfserr_inval; | |
2521 | } | |
2522 | ||
cb73a9f4 BF |
2523 | __be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_backchannel_ctl *bc) |
2524 | { | |
2525 | struct nfsd4_session *session = cstate->session; | |
c9a49628 | 2526 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
b78724b7 | 2527 | __be32 status; |
cb73a9f4 | 2528 | |
b78724b7 BF |
2529 | status = nfsd4_check_cb_sec(&bc->bc_cb_sec); |
2530 | if (status) | |
2531 | return status; | |
c9a49628 | 2532 | spin_lock(&nn->client_lock); |
cb73a9f4 BF |
2533 | session->se_cb_prog = bc->bc_cb_program; |
2534 | session->se_cb_sec = bc->bc_cb_sec; | |
c9a49628 | 2535 | spin_unlock(&nn->client_lock); |
cb73a9f4 BF |
2536 | |
2537 | nfsd4_probe_callback(session->se_client); | |
2538 | ||
2539 | return nfs_ok; | |
2540 | } | |
2541 | ||
1d1bc8f2 BF |
2542 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, |
2543 | struct nfsd4_compound_state *cstate, | |
2544 | struct nfsd4_bind_conn_to_session *bcts) | |
2545 | { | |
2546 | __be32 status; | |
3ba63671 | 2547 | struct nfsd4_conn *conn; |
4f6e6c17 | 2548 | struct nfsd4_session *session; |
d4e19e70 TM |
2549 | struct net *net = SVC_NET(rqstp); |
2550 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1d1bc8f2 BF |
2551 | |
2552 | if (!nfsd4_last_compound_op(rqstp)) | |
2553 | return nfserr_not_only_op; | |
4f6e6c17 | 2554 | nfs4_lock_state(); |
c9a49628 | 2555 | spin_lock(&nn->client_lock); |
d4e19e70 | 2556 | session = find_in_sessionid_hashtbl(&bcts->sessionid, net, &status); |
c9a49628 | 2557 | spin_unlock(&nn->client_lock); |
4f6e6c17 | 2558 | if (!session) |
d4e19e70 | 2559 | goto out_no_session; |
57266a6e BF |
2560 | status = nfserr_wrong_cred; |
2561 | if (!mach_creds_match(session->se_client, rqstp)) | |
2562 | goto out; | |
1d1bc8f2 | 2563 | status = nfsd4_map_bcts_dir(&bcts->dir); |
3ba63671 | 2564 | if (status) |
4f6e6c17 | 2565 | goto out; |
3ba63671 | 2566 | conn = alloc_conn(rqstp, bcts->dir); |
4f6e6c17 | 2567 | status = nfserr_jukebox; |
3ba63671 | 2568 | if (!conn) |
4f6e6c17 BF |
2569 | goto out; |
2570 | nfsd4_init_conn(rqstp, conn, session); | |
2571 | status = nfs_ok; | |
2572 | out: | |
d4e19e70 TM |
2573 | nfsd4_put_session(session); |
2574 | out_no_session: | |
4f6e6c17 BF |
2575 | nfs4_unlock_state(); |
2576 | return status; | |
1d1bc8f2 BF |
2577 | } |
2578 | ||
5d4cec2f BF |
2579 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
2580 | { | |
2581 | if (!session) | |
2582 | return 0; | |
2583 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
2584 | } | |
2585 | ||
069b6ad4 AA |
2586 | __be32 |
2587 | nfsd4_destroy_session(struct svc_rqst *r, | |
2588 | struct nfsd4_compound_state *cstate, | |
2589 | struct nfsd4_destroy_session *sessionid) | |
2590 | { | |
e10e0cfc | 2591 | struct nfsd4_session *ses; |
abcdff09 | 2592 | __be32 status; |
f0f51f5c | 2593 | int ref_held_by_me = 0; |
d4e19e70 TM |
2594 | struct net *net = SVC_NET(r); |
2595 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
e10e0cfc | 2596 | |
abcdff09 BF |
2597 | nfs4_lock_state(); |
2598 | status = nfserr_not_only_op; | |
5d4cec2f | 2599 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 | 2600 | if (!nfsd4_last_compound_op(r)) |
abcdff09 | 2601 | goto out; |
f0f51f5c | 2602 | ref_held_by_me++; |
57716355 | 2603 | } |
e10e0cfc | 2604 | dump_sessionid(__func__, &sessionid->sessionid); |
c9a49628 | 2605 | spin_lock(&nn->client_lock); |
d4e19e70 | 2606 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid, net, &status); |
abcdff09 BF |
2607 | if (!ses) |
2608 | goto out_client_lock; | |
57266a6e BF |
2609 | status = nfserr_wrong_cred; |
2610 | if (!mach_creds_match(ses->se_client, r)) | |
d4e19e70 | 2611 | goto out_put_session; |
f0f51f5c | 2612 | status = mark_session_dead_locked(ses, 1 + ref_held_by_me); |
66b2b9b2 | 2613 | if (status) |
f0f51f5c | 2614 | goto out_put_session; |
e10e0cfc | 2615 | unhash_session(ses); |
c9a49628 | 2616 | spin_unlock(&nn->client_lock); |
e10e0cfc | 2617 | |
84f5f7cc | 2618 | nfsd4_probe_callback_sync(ses->se_client); |
19cf5c02 | 2619 | |
c9a49628 | 2620 | spin_lock(&nn->client_lock); |
e10e0cfc | 2621 | status = nfs_ok; |
f0f51f5c | 2622 | out_put_session: |
d4e19e70 | 2623 | nfsd4_put_session_locked(ses); |
abcdff09 BF |
2624 | out_client_lock: |
2625 | spin_unlock(&nn->client_lock); | |
e10e0cfc | 2626 | out: |
abcdff09 | 2627 | nfs4_unlock_state(); |
e10e0cfc | 2628 | return status; |
069b6ad4 AA |
2629 | } |
2630 | ||
a663bdd8 | 2631 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
2632 | { |
2633 | struct nfsd4_conn *c; | |
2634 | ||
2635 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 2636 | if (c->cn_xprt == xpt) { |
328ead28 BF |
2637 | return c; |
2638 | } | |
2639 | } | |
2640 | return NULL; | |
2641 | } | |
2642 | ||
57266a6e | 2643 | static __be32 nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
2644 | { |
2645 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 2646 | struct nfsd4_conn *c; |
57266a6e | 2647 | __be32 status = nfs_ok; |
21b75b01 | 2648 | int ret; |
328ead28 BF |
2649 | |
2650 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 2651 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
57266a6e BF |
2652 | if (c) |
2653 | goto out_free; | |
2654 | status = nfserr_conn_not_bound_to_session; | |
2655 | if (clp->cl_mach_cred) | |
2656 | goto out_free; | |
328ead28 BF |
2657 | __nfsd4_hash_conn(new, ses); |
2658 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
2659 | ret = nfsd4_register_conn(new); |
2660 | if (ret) | |
2661 | /* oops; xprt is already down: */ | |
2662 | nfsd4_conn_lost(&new->cn_xpt_user); | |
57266a6e BF |
2663 | return nfs_ok; |
2664 | out_free: | |
2665 | spin_unlock(&clp->cl_lock); | |
2666 | free_conn(new); | |
2667 | return status; | |
328ead28 BF |
2668 | } |
2669 | ||
868b89c3 MJ |
2670 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
2671 | { | |
2672 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
2673 | ||
2674 | return args->opcnt > session->se_fchannel.maxops; | |
2675 | } | |
2676 | ||
ae82a8d0 MJ |
2677 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
2678 | struct nfsd4_session *session) | |
2679 | { | |
2680 | struct xdr_buf *xb = &rqstp->rq_arg; | |
2681 | ||
2682 | return xb->len > session->se_fchannel.maxreq_sz; | |
2683 | } | |
2684 | ||
069b6ad4 | 2685 | __be32 |
b85d4c01 | 2686 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
2687 | struct nfsd4_compound_state *cstate, |
2688 | struct nfsd4_sequence *seq) | |
2689 | { | |
f9bb94c4 | 2690 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
47ee5298 | 2691 | struct xdr_stream *xdr = &resp->xdr; |
b85d4c01 | 2692 | struct nfsd4_session *session; |
221a6876 | 2693 | struct nfs4_client *clp; |
b85d4c01 | 2694 | struct nfsd4_slot *slot; |
a663bdd8 | 2695 | struct nfsd4_conn *conn; |
57b7b43b | 2696 | __be32 status; |
47ee5298 | 2697 | int buflen; |
d4e19e70 TM |
2698 | struct net *net = SVC_NET(rqstp); |
2699 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
b85d4c01 | 2700 | |
f9bb94c4 AA |
2701 | if (resp->opcnt != 1) |
2702 | return nfserr_sequence_pos; | |
2703 | ||
a663bdd8 BF |
2704 | /* |
2705 | * Will be either used or freed by nfsd4_sequence_check_conn | |
2706 | * below. | |
2707 | */ | |
2708 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
2709 | if (!conn) | |
2710 | return nfserr_jukebox; | |
2711 | ||
c9a49628 | 2712 | spin_lock(&nn->client_lock); |
d4e19e70 | 2713 | session = find_in_sessionid_hashtbl(&seq->sessionid, net, &status); |
b85d4c01 | 2714 | if (!session) |
221a6876 BF |
2715 | goto out_no_session; |
2716 | clp = session->se_client; | |
b85d4c01 | 2717 | |
868b89c3 MJ |
2718 | status = nfserr_too_many_ops; |
2719 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
66b2b9b2 | 2720 | goto out_put_session; |
868b89c3 | 2721 | |
ae82a8d0 MJ |
2722 | status = nfserr_req_too_big; |
2723 | if (nfsd4_request_too_big(rqstp, session)) | |
66b2b9b2 | 2724 | goto out_put_session; |
ae82a8d0 | 2725 | |
b85d4c01 | 2726 | status = nfserr_badslot; |
6c18ba9f | 2727 | if (seq->slotid >= session->se_fchannel.maxreqs) |
66b2b9b2 | 2728 | goto out_put_session; |
b85d4c01 | 2729 | |
557ce264 | 2730 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
2731 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
2732 | ||
a8dfdaeb AA |
2733 | /* We do not negotiate the number of slots yet, so set the |
2734 | * maxslots to the session maxreqs which is used to encode | |
2735 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
2736 | seq->maxslots = session->se_fchannel.maxreqs; | |
2737 | ||
73e79482 BF |
2738 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, |
2739 | slot->sl_flags & NFSD4_SLOT_INUSE); | |
b85d4c01 | 2740 | if (status == nfserr_replay_cache) { |
bf5c43c8 BF |
2741 | status = nfserr_seq_misordered; |
2742 | if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) | |
66b2b9b2 | 2743 | goto out_put_session; |
b85d4c01 BH |
2744 | cstate->slot = slot; |
2745 | cstate->session = session; | |
4b24ca7d | 2746 | cstate->clp = clp; |
da3846a2 | 2747 | /* Return the cached reply status and set cstate->status |
557ce264 | 2748 | * for nfsd4_proc_compound processing */ |
bf864a31 | 2749 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 2750 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 2751 | goto out; |
b85d4c01 BH |
2752 | } |
2753 | if (status) | |
66b2b9b2 | 2754 | goto out_put_session; |
b85d4c01 | 2755 | |
57266a6e | 2756 | status = nfsd4_sequence_check_conn(conn, session); |
a663bdd8 | 2757 | conn = NULL; |
57266a6e BF |
2758 | if (status) |
2759 | goto out_put_session; | |
328ead28 | 2760 | |
47ee5298 BF |
2761 | buflen = (seq->cachethis) ? |
2762 | session->se_fchannel.maxresp_cached : | |
2763 | session->se_fchannel.maxresp_sz; | |
2764 | status = (seq->cachethis) ? nfserr_rep_too_big_to_cache : | |
2765 | nfserr_rep_too_big; | |
a5cddc88 | 2766 | if (xdr_restrict_buflen(xdr, buflen - rqstp->rq_auth_slack)) |
47ee5298 | 2767 | goto out_put_session; |
32aaa62e | 2768 | svc_reserve(rqstp, buflen); |
47ee5298 BF |
2769 | |
2770 | status = nfs_ok; | |
b85d4c01 | 2771 | /* Success! bump slot seqid */ |
b85d4c01 | 2772 | slot->sl_seqid = seq->seqid; |
bf5c43c8 | 2773 | slot->sl_flags |= NFSD4_SLOT_INUSE; |
73e79482 BF |
2774 | if (seq->cachethis) |
2775 | slot->sl_flags |= NFSD4_SLOT_CACHETHIS; | |
bf5c43c8 BF |
2776 | else |
2777 | slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; | |
b85d4c01 BH |
2778 | |
2779 | cstate->slot = slot; | |
2780 | cstate->session = session; | |
4b24ca7d | 2781 | cstate->clp = clp; |
b85d4c01 | 2782 | |
b85d4c01 | 2783 | out: |
221a6876 BF |
2784 | switch (clp->cl_cb_state) { |
2785 | case NFSD4_CB_DOWN: | |
2786 | seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; | |
2787 | break; | |
2788 | case NFSD4_CB_FAULT: | |
2789 | seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; | |
2790 | break; | |
2791 | default: | |
2792 | seq->status_flags = 0; | |
aaf84eb9 | 2793 | } |
3bd64a5b BF |
2794 | if (!list_empty(&clp->cl_revoked)) |
2795 | seq->status_flags |= SEQ4_STATUS_RECALLABLE_STATE_REVOKED; | |
221a6876 | 2796 | out_no_session: |
3f42d2c4 KM |
2797 | if (conn) |
2798 | free_conn(conn); | |
c9a49628 | 2799 | spin_unlock(&nn->client_lock); |
b85d4c01 | 2800 | return status; |
66b2b9b2 | 2801 | out_put_session: |
d4e19e70 | 2802 | nfsd4_put_session_locked(session); |
221a6876 | 2803 | goto out_no_session; |
069b6ad4 AA |
2804 | } |
2805 | ||
b607664e TM |
2806 | void |
2807 | nfsd4_sequence_done(struct nfsd4_compoundres *resp) | |
2808 | { | |
2809 | struct nfsd4_compound_state *cs = &resp->cstate; | |
2810 | ||
2811 | if (nfsd4_has_session(cs)) { | |
b607664e TM |
2812 | if (cs->status != nfserr_replay_cache) { |
2813 | nfsd4_store_cache_entry(resp); | |
2814 | cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE; | |
2815 | } | |
d4e19e70 | 2816 | /* Drop session reference that was taken in nfsd4_sequence() */ |
b607664e | 2817 | nfsd4_put_session(cs->session); |
4b24ca7d JL |
2818 | } else if (cs->clp) |
2819 | put_client_renew(cs->clp); | |
b607664e TM |
2820 | } |
2821 | ||
345c2842 MJ |
2822 | __be32 |
2823 | nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) | |
2824 | { | |
2825 | struct nfs4_client *conf, *unconf, *clp; | |
57b7b43b | 2826 | __be32 status = 0; |
8daae4dc | 2827 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
345c2842 MJ |
2828 | |
2829 | nfs4_lock_state(); | |
0a7ec377 | 2830 | unconf = find_unconfirmed_client(&dc->clientid, true, nn); |
8daae4dc | 2831 | conf = find_confirmed_client(&dc->clientid, true, nn); |
78389046 | 2832 | WARN_ON_ONCE(conf && unconf); |
345c2842 MJ |
2833 | |
2834 | if (conf) { | |
2835 | clp = conf; | |
2836 | ||
c0293b01 | 2837 | if (client_has_state(conf)) { |
345c2842 MJ |
2838 | status = nfserr_clientid_busy; |
2839 | goto out; | |
2840 | } | |
2841 | } else if (unconf) | |
2842 | clp = unconf; | |
2843 | else { | |
2844 | status = nfserr_stale_clientid; | |
2845 | goto out; | |
2846 | } | |
57266a6e BF |
2847 | if (!mach_creds_match(clp, rqstp)) { |
2848 | status = nfserr_wrong_cred; | |
2849 | goto out; | |
2850 | } | |
345c2842 MJ |
2851 | expire_client(clp); |
2852 | out: | |
2853 | nfs4_unlock_state(); | |
345c2842 MJ |
2854 | return status; |
2855 | } | |
2856 | ||
4dc6ec00 BF |
2857 | __be32 |
2858 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
2859 | { | |
57b7b43b | 2860 | __be32 status = 0; |
bcecf1cc | 2861 | |
4dc6ec00 BF |
2862 | if (rc->rca_one_fs) { |
2863 | if (!cstate->current_fh.fh_dentry) | |
2864 | return nfserr_nofilehandle; | |
2865 | /* | |
2866 | * We don't take advantage of the rca_one_fs case. | |
2867 | * That's OK, it's optional, we can safely ignore it. | |
2868 | */ | |
2869 | return nfs_ok; | |
2870 | } | |
bcecf1cc | 2871 | |
4dc6ec00 | 2872 | nfs4_lock_state(); |
bcecf1cc | 2873 | status = nfserr_complete_already; |
a52d726b JL |
2874 | if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, |
2875 | &cstate->session->se_client->cl_flags)) | |
bcecf1cc MJ |
2876 | goto out; |
2877 | ||
2878 | status = nfserr_stale_clientid; | |
2879 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
2880 | /* |
2881 | * The following error isn't really legal. | |
2882 | * But we only get here if the client just explicitly | |
2883 | * destroyed the client. Surely it no longer cares what | |
2884 | * error it gets back on an operation for the dead | |
2885 | * client. | |
2886 | */ | |
bcecf1cc MJ |
2887 | goto out; |
2888 | ||
2889 | status = nfs_ok; | |
2a4317c5 | 2890 | nfsd4_client_record_create(cstate->session->se_client); |
bcecf1cc | 2891 | out: |
4dc6ec00 | 2892 | nfs4_unlock_state(); |
bcecf1cc | 2893 | return status; |
4dc6ec00 BF |
2894 | } |
2895 | ||
b37ad28b | 2896 | __be32 |
b591480b BF |
2897 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2898 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 2899 | { |
a084daf5 | 2900 | struct xdr_netobj clname = setclid->se_name; |
1da177e4 | 2901 | nfs4_verifier clverifier = setclid->se_verf; |
28ce6054 | 2902 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 2903 | __be32 status; |
c212cecf SK |
2904 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
2905 | ||
63db4632 | 2906 | /* Cases below refer to rfc 3530 section 14.2.33: */ |
1da177e4 | 2907 | nfs4_lock_state(); |
382a62e7 | 2908 | conf = find_confirmed_client_by_name(&clname, nn); |
28ce6054 | 2909 | if (conf) { |
63db4632 | 2910 | /* case 0: */ |
1da177e4 | 2911 | status = nfserr_clid_inuse; |
e203d506 BF |
2912 | if (clp_used_exchangeid(conf)) |
2913 | goto out; | |
026722c2 | 2914 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
2915 | char addr_str[INET6_ADDRSTRLEN]; |
2916 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
2917 | sizeof(addr_str)); | |
2918 | dprintk("NFSD: setclientid: string in use by client " | |
2919 | "at %s\n", addr_str); | |
1da177e4 LT |
2920 | goto out; |
2921 | } | |
1da177e4 | 2922 | } |
a99454aa | 2923 | unconf = find_unconfirmed_client_by_name(&clname, nn); |
8f930711 BF |
2924 | if (unconf) |
2925 | expire_client(unconf); | |
3e772463 | 2926 | status = nfserr_jukebox; |
2216d449 | 2927 | new = create_client(clname, rqstp, &clverifier); |
8f930711 BF |
2928 | if (new == NULL) |
2929 | goto out; | |
34b232bb | 2930 | if (conf && same_verf(&conf->cl_verifier, &clverifier)) |
63db4632 | 2931 | /* case 1: probable callback update */ |
1da177e4 | 2932 | copy_clid(new, conf); |
34b232bb | 2933 | else /* case 4 (new client) or cases 2, 3 (client reboot): */ |
c212cecf | 2934 | gen_clid(new, nn); |
8323c3b2 | 2935 | new->cl_minorversion = 0; |
6f3d772f | 2936 | gen_callback(new, setclid, rqstp); |
ac55fdc4 | 2937 | add_to_unconfirmed(new); |
1da177e4 LT |
2938 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
2939 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
2940 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
2941 | status = nfs_ok; | |
2942 | out: | |
2943 | nfs4_unlock_state(); | |
2944 | return status; | |
2945 | } | |
2946 | ||
2947 | ||
b37ad28b | 2948 | __be32 |
b591480b BF |
2949 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
2950 | struct nfsd4_compound_state *cstate, | |
2951 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 2952 | { |
21ab45a4 | 2953 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
2954 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
2955 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 2956 | __be32 status; |
7f2210fa | 2957 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 2958 | |
2c142baa | 2959 | if (STALE_CLIENTID(clid, nn)) |
1da177e4 | 2960 | return nfserr_stale_clientid; |
1da177e4 | 2961 | nfs4_lock_state(); |
21ab45a4 | 2962 | |
8daae4dc | 2963 | conf = find_confirmed_client(clid, false, nn); |
0a7ec377 | 2964 | unconf = find_unconfirmed_client(clid, false, nn); |
a186e767 | 2965 | /* |
8695b90a BF |
2966 | * We try hard to give out unique clientid's, so if we get an |
2967 | * attempt to confirm the same clientid with a different cred, | |
2968 | * there's a bug somewhere. Let's charitably assume it's our | |
2969 | * bug. | |
a186e767 | 2970 | */ |
8695b90a BF |
2971 | status = nfserr_serverfault; |
2972 | if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) | |
2973 | goto out; | |
2974 | if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) | |
2975 | goto out; | |
63db4632 | 2976 | /* cases below refer to rfc 3530 section 14.2.34: */ |
90d700b7 BF |
2977 | if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) { |
2978 | if (conf && !unconf) /* case 2: probable retransmit */ | |
1da177e4 | 2979 | status = nfs_ok; |
90d700b7 BF |
2980 | else /* case 4: client hasn't noticed we rebooted yet? */ |
2981 | status = nfserr_stale_clientid; | |
2982 | goto out; | |
2983 | } | |
2984 | status = nfs_ok; | |
2985 | if (conf) { /* case 1: callback update */ | |
8695b90a BF |
2986 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
2987 | nfsd4_probe_callback(conf); | |
2988 | expire_client(unconf); | |
90d700b7 | 2989 | } else { /* case 3: normal case; new or rebooted client */ |
382a62e7 | 2990 | conf = find_confirmed_client_by_name(&unconf->cl_name, nn); |
221a6876 BF |
2991 | if (conf) { |
2992 | status = mark_client_expired(conf); | |
2993 | if (status) | |
2994 | goto out; | |
8695b90a | 2995 | expire_client(conf); |
221a6876 | 2996 | } |
8695b90a | 2997 | move_to_confirmed(unconf); |
f3d03b92 | 2998 | nfsd4_probe_callback(unconf); |
08e8987c | 2999 | } |
1da177e4 | 3000 | out: |
1da177e4 LT |
3001 | nfs4_unlock_state(); |
3002 | return status; | |
3003 | } | |
3004 | ||
32513b40 BF |
3005 | static struct nfs4_file *nfsd4_alloc_file(void) |
3006 | { | |
3007 | return kmem_cache_alloc(file_slab, GFP_KERNEL); | |
3008 | } | |
3009 | ||
1da177e4 | 3010 | /* OPEN Share state helper functions */ |
f9c00c3a | 3011 | static void nfsd4_init_file(struct nfs4_file *fp, struct knfsd_fh *fh) |
1da177e4 | 3012 | { |
ca943217 | 3013 | unsigned int hashval = file_hashval(fh); |
1da177e4 | 3014 | |
950e0118 TM |
3015 | lockdep_assert_held(&state_lock); |
3016 | ||
32513b40 | 3017 | atomic_set(&fp->fi_ref, 1); |
1d31a253 | 3018 | spin_lock_init(&fp->fi_lock); |
32513b40 BF |
3019 | INIT_LIST_HEAD(&fp->fi_stateids); |
3020 | INIT_LIST_HEAD(&fp->fi_delegations); | |
e2cf80d7 | 3021 | fh_copy_shallow(&fp->fi_fhandle, fh); |
32513b40 BF |
3022 | fp->fi_had_conflict = false; |
3023 | fp->fi_lease = NULL; | |
baeb4ff0 | 3024 | fp->fi_share_deny = 0; |
32513b40 BF |
3025 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); |
3026 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
89876f8c | 3027 | hlist_add_head(&fp->fi_hash, &file_hashtbl[hashval]); |
1da177e4 LT |
3028 | } |
3029 | ||
e8ff2a84 | 3030 | void |
1da177e4 LT |
3031 | nfsd4_free_slabs(void) |
3032 | { | |
abf1135b CH |
3033 | kmem_cache_destroy(openowner_slab); |
3034 | kmem_cache_destroy(lockowner_slab); | |
3035 | kmem_cache_destroy(file_slab); | |
3036 | kmem_cache_destroy(stateid_slab); | |
3037 | kmem_cache_destroy(deleg_slab); | |
e60d4398 | 3038 | } |
1da177e4 | 3039 | |
72083396 | 3040 | int |
e60d4398 N |
3041 | nfsd4_init_slabs(void) |
3042 | { | |
fe0750e5 BF |
3043 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
3044 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
3045 | if (openowner_slab == NULL) | |
abf1135b | 3046 | goto out; |
fe0750e5 | 3047 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", |
3c40794b | 3048 | sizeof(struct nfs4_lockowner), 0, 0, NULL); |
fe0750e5 | 3049 | if (lockowner_slab == NULL) |
abf1135b | 3050 | goto out_free_openowner_slab; |
e60d4398 | 3051 | file_slab = kmem_cache_create("nfsd4_files", |
20c2df83 | 3052 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 | 3053 | if (file_slab == NULL) |
abf1135b | 3054 | goto out_free_lockowner_slab; |
5ac049ac | 3055 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
dcef0413 | 3056 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
5ac049ac | 3057 | if (stateid_slab == NULL) |
abf1135b | 3058 | goto out_free_file_slab; |
5b2d21c1 | 3059 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 3060 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 | 3061 | if (deleg_slab == NULL) |
abf1135b | 3062 | goto out_free_stateid_slab; |
e60d4398 | 3063 | return 0; |
abf1135b CH |
3064 | |
3065 | out_free_stateid_slab: | |
3066 | kmem_cache_destroy(stateid_slab); | |
3067 | out_free_file_slab: | |
3068 | kmem_cache_destroy(file_slab); | |
3069 | out_free_lockowner_slab: | |
3070 | kmem_cache_destroy(lockowner_slab); | |
3071 | out_free_openowner_slab: | |
3072 | kmem_cache_destroy(openowner_slab); | |
3073 | out: | |
e60d4398 N |
3074 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); |
3075 | return -ENOMEM; | |
1da177e4 LT |
3076 | } |
3077 | ||
ff194bd9 | 3078 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 3079 | { |
ff194bd9 BF |
3080 | rp->rp_status = nfserr_serverfault; |
3081 | rp->rp_buflen = 0; | |
3082 | rp->rp_buf = rp->rp_ibuf; | |
58fb12e6 JL |
3083 | mutex_init(&rp->rp_mutex); |
3084 | } | |
3085 | ||
3086 | static void nfsd4_cstate_assign_replay(struct nfsd4_compound_state *cstate, | |
3087 | struct nfs4_stateowner *so) | |
3088 | { | |
3089 | if (!nfsd4_has_session(cstate)) { | |
3090 | mutex_lock(&so->so_replay.rp_mutex); | |
3091 | cstate->replay_owner = so; | |
3092 | atomic_inc(&so->so_count); | |
3093 | } | |
3094 | } | |
3095 | ||
3096 | void nfsd4_cstate_clear_replay(struct nfsd4_compound_state *cstate) | |
3097 | { | |
3098 | struct nfs4_stateowner *so = cstate->replay_owner; | |
3099 | ||
3100 | if (so != NULL) { | |
3101 | cstate->replay_owner = NULL; | |
3102 | mutex_unlock(&so->so_replay.rp_mutex); | |
3103 | nfs4_put_stateowner(so); | |
3104 | } | |
1da177e4 LT |
3105 | } |
3106 | ||
fe0750e5 | 3107 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 3108 | { |
1da177e4 | 3109 | struct nfs4_stateowner *sop; |
1da177e4 | 3110 | |
fe0750e5 | 3111 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
3112 | if (!sop) |
3113 | return NULL; | |
3114 | ||
3115 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); | |
3116 | if (!sop->so_owner.data) { | |
fe0750e5 | 3117 | kmem_cache_free(slab, sop); |
1da177e4 | 3118 | return NULL; |
ff194bd9 BF |
3119 | } |
3120 | sop->so_owner.len = owner->len; | |
3121 | ||
ea1da636 | 3122 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 BF |
3123 | sop->so_client = clp; |
3124 | init_nfs4_replay(&sop->so_replay); | |
6b180f0b | 3125 | atomic_set(&sop->so_count, 1); |
ff194bd9 BF |
3126 | return sop; |
3127 | } | |
3128 | ||
fe0750e5 | 3129 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 | 3130 | { |
d4f0489f | 3131 | lockdep_assert_held(&clp->cl_lock); |
9b531137 | 3132 | |
d4f0489f TM |
3133 | list_add(&oo->oo_owner.so_strhash, |
3134 | &clp->cl_ownerstr_hashtbl[strhashval]); | |
fe0750e5 | 3135 | list_add(&oo->oo_perclient, &clp->cl_openowners); |
ff194bd9 BF |
3136 | } |
3137 | ||
8f4b54c5 JL |
3138 | static void nfs4_unhash_openowner(struct nfs4_stateowner *so) |
3139 | { | |
d4f0489f | 3140 | unhash_openowner_locked(openowner(so)); |
8f4b54c5 JL |
3141 | } |
3142 | ||
6b180f0b JL |
3143 | static void nfs4_free_openowner(struct nfs4_stateowner *so) |
3144 | { | |
3145 | struct nfs4_openowner *oo = openowner(so); | |
3146 | ||
3147 | kmem_cache_free(openowner_slab, oo); | |
3148 | } | |
3149 | ||
3150 | static const struct nfs4_stateowner_operations openowner_ops = { | |
8f4b54c5 JL |
3151 | .so_unhash = nfs4_unhash_openowner, |
3152 | .so_free = nfs4_free_openowner, | |
6b180f0b JL |
3153 | }; |
3154 | ||
fe0750e5 | 3155 | static struct nfs4_openowner * |
13d6f66b | 3156 | alloc_init_open_stateowner(unsigned int strhashval, struct nfsd4_open *open, |
db24b3b4 JL |
3157 | struct nfsd4_compound_state *cstate) |
3158 | { | |
13d6f66b | 3159 | struct nfs4_client *clp = cstate->clp; |
7ffb5880 | 3160 | struct nfs4_openowner *oo, *ret; |
ff194bd9 | 3161 | |
fe0750e5 BF |
3162 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
3163 | if (!oo) | |
ff194bd9 | 3164 | return NULL; |
6b180f0b | 3165 | oo->oo_owner.so_ops = &openowner_ops; |
fe0750e5 BF |
3166 | oo->oo_owner.so_is_open_owner = 1; |
3167 | oo->oo_owner.so_seqid = open->op_seqid; | |
d3134b10 | 3168 | oo->oo_flags = 0; |
db24b3b4 JL |
3169 | if (nfsd4_has_session(cstate)) |
3170 | oo->oo_flags |= NFS4_OO_CONFIRMED; | |
fe0750e5 | 3171 | oo->oo_time = 0; |
38c387b5 | 3172 | oo->oo_last_closed_stid = NULL; |
fe0750e5 | 3173 | INIT_LIST_HEAD(&oo->oo_close_lru); |
d4f0489f TM |
3174 | spin_lock(&clp->cl_lock); |
3175 | ret = find_openstateowner_str_locked(strhashval, open, clp); | |
7ffb5880 TM |
3176 | if (ret == NULL) { |
3177 | hash_openowner(oo, clp, strhashval); | |
3178 | ret = oo; | |
3179 | } else | |
3180 | nfs4_free_openowner(&oo->oo_owner); | |
d4f0489f | 3181 | spin_unlock(&clp->cl_lock); |
fe0750e5 | 3182 | return oo; |
1da177e4 LT |
3183 | } |
3184 | ||
996e0938 | 3185 | static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { |
fe0750e5 | 3186 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 3187 | |
d6f2bc5d | 3188 | atomic_inc(&stp->st_stid.sc_count); |
3abdb607 | 3189 | stp->st_stid.sc_type = NFS4_OPEN_STID; |
3c87b9b7 | 3190 | INIT_LIST_HEAD(&stp->st_locks); |
fe0750e5 | 3191 | stp->st_stateowner = &oo->oo_owner; |
d3134b10 | 3192 | atomic_inc(&stp->st_stateowner->so_count); |
13cd2184 | 3193 | get_nfs4_file(fp); |
11b9164a | 3194 | stp->st_stid.sc_file = fp; |
1da177e4 LT |
3195 | stp->st_access_bmap = 0; |
3196 | stp->st_deny_bmap = 0; | |
4c4cd222 | 3197 | stp->st_openstp = NULL; |
1c755dc1 JL |
3198 | spin_lock(&oo->oo_owner.so_client->cl_lock); |
3199 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); | |
1d31a253 TM |
3200 | spin_lock(&fp->fi_lock); |
3201 | list_add(&stp->st_perfile, &fp->fi_stateids); | |
3202 | spin_unlock(&fp->fi_lock); | |
1c755dc1 | 3203 | spin_unlock(&oo->oo_owner.so_client->cl_lock); |
1da177e4 LT |
3204 | } |
3205 | ||
d3134b10 JL |
3206 | /* |
3207 | * In the 4.0 case we need to keep the owners around a little while to handle | |
3208 | * CLOSE replay. We still do need to release any file access that is held by | |
3209 | * them before returning however. | |
3210 | */ | |
fd39ca9a | 3211 | static void |
d3134b10 | 3212 | move_to_close_lru(struct nfs4_ol_stateid *s, struct net *net) |
1da177e4 | 3213 | { |
d3134b10 JL |
3214 | struct nfs4_openowner *oo = openowner(s->st_stateowner); |
3215 | struct nfsd_net *nn = net_generic(s->st_stid.sc_client->net, | |
3216 | nfsd_net_id); | |
73758fed | 3217 | |
fe0750e5 | 3218 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 3219 | |
b401be22 JL |
3220 | /* |
3221 | * We know that we hold one reference via nfsd4_close, and another | |
3222 | * "persistent" reference for the client. If the refcount is higher | |
3223 | * than 2, then there are still calls in progress that are using this | |
3224 | * stateid. We can't put the sc_file reference until they are finished. | |
3225 | * Wait for the refcount to drop to 2. Since it has been unhashed, | |
3226 | * there should be no danger of the refcount going back up again at | |
3227 | * this point. | |
3228 | */ | |
3229 | wait_event(close_wq, atomic_read(&s->st_stid.sc_count) == 2); | |
3230 | ||
d3134b10 JL |
3231 | release_all_access(s); |
3232 | if (s->st_stid.sc_file) { | |
3233 | put_nfs4_file(s->st_stid.sc_file); | |
3234 | s->st_stid.sc_file = NULL; | |
3235 | } | |
3236 | release_last_closed_stateid(oo); | |
3237 | oo->oo_last_closed_stid = s; | |
73758fed | 3238 | list_move_tail(&oo->oo_close_lru, &nn->close_lru); |
fe0750e5 | 3239 | oo->oo_time = get_seconds(); |
1da177e4 LT |
3240 | } |
3241 | ||
1da177e4 LT |
3242 | /* search file_hashtbl[] for file */ |
3243 | static struct nfs4_file * | |
ca943217 | 3244 | find_file_locked(struct knfsd_fh *fh) |
1da177e4 | 3245 | { |
ca943217 | 3246 | unsigned int hashval = file_hashval(fh); |
1da177e4 LT |
3247 | struct nfs4_file *fp; |
3248 | ||
950e0118 TM |
3249 | lockdep_assert_held(&state_lock); |
3250 | ||
89876f8c | 3251 | hlist_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
ca943217 | 3252 | if (nfsd_fh_match(&fp->fi_fhandle, fh)) { |
13cd2184 | 3253 | get_nfs4_file(fp); |
1da177e4 | 3254 | return fp; |
13cd2184 | 3255 | } |
1da177e4 LT |
3256 | } |
3257 | return NULL; | |
3258 | } | |
3259 | ||
950e0118 | 3260 | static struct nfs4_file * |
ca943217 | 3261 | find_file(struct knfsd_fh *fh) |
950e0118 TM |
3262 | { |
3263 | struct nfs4_file *fp; | |
3264 | ||
3265 | spin_lock(&state_lock); | |
ca943217 | 3266 | fp = find_file_locked(fh); |
950e0118 TM |
3267 | spin_unlock(&state_lock); |
3268 | return fp; | |
3269 | } | |
3270 | ||
3271 | static struct nfs4_file * | |
f9c00c3a | 3272 | find_or_add_file(struct nfs4_file *new, struct knfsd_fh *fh) |
950e0118 TM |
3273 | { |
3274 | struct nfs4_file *fp; | |
3275 | ||
3276 | spin_lock(&state_lock); | |
ca943217 | 3277 | fp = find_file_locked(fh); |
950e0118 | 3278 | if (fp == NULL) { |
f9c00c3a | 3279 | nfsd4_init_file(new, fh); |
950e0118 TM |
3280 | fp = new; |
3281 | } | |
3282 | spin_unlock(&state_lock); | |
3283 | ||
3284 | return fp; | |
3285 | } | |
3286 | ||
1da177e4 LT |
3287 | /* |
3288 | * Called to check deny when READ with all zero stateid or | |
3289 | * WRITE with all zero or all one stateid | |
3290 | */ | |
b37ad28b | 3291 | static __be32 |
1da177e4 LT |
3292 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
3293 | { | |
1da177e4 | 3294 | struct nfs4_file *fp; |
baeb4ff0 | 3295 | __be32 ret = nfs_ok; |
1da177e4 | 3296 | |
ca943217 | 3297 | fp = find_file(¤t_fh->fh_handle); |
13cd2184 | 3298 | if (!fp) |
baeb4ff0 JL |
3299 | return ret; |
3300 | /* Check for conflicting share reservations */ | |
1d31a253 | 3301 | spin_lock(&fp->fi_lock); |
baeb4ff0 JL |
3302 | if (fp->fi_share_deny & deny_type) |
3303 | ret = nfserr_locked; | |
1d31a253 | 3304 | spin_unlock(&fp->fi_lock); |
13cd2184 N |
3305 | put_nfs4_file(fp); |
3306 | return ret; | |
1da177e4 LT |
3307 | } |
3308 | ||
02e1215f | 3309 | void nfsd4_prepare_cb_recall(struct nfs4_delegation *dp) |
1da177e4 | 3310 | { |
11b9164a TM |
3311 | struct nfsd_net *nn = net_generic(dp->dl_stid.sc_client->net, |
3312 | nfsd_net_id); | |
e8c69d17 | 3313 | |
11b9164a | 3314 | block_delegations(&dp->dl_stid.sc_file->fi_fhandle); |
f54fe962 | 3315 | |
dff1399f | 3316 | /* |
f54fe962 JL |
3317 | * We can't do this in nfsd_break_deleg_cb because it is |
3318 | * already holding inode->i_lock. | |
3319 | * | |
dff1399f JL |
3320 | * If the dl_time != 0, then we know that it has already been |
3321 | * queued for a lease break. Don't queue it again. | |
3322 | */ | |
f54fe962 | 3323 | spin_lock(&state_lock); |
dff1399f | 3324 | if (dp->dl_time == 0) { |
dff1399f | 3325 | dp->dl_time = get_seconds(); |
02e1215f | 3326 | list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru); |
dff1399f | 3327 | } |
02e1215f JL |
3328 | spin_unlock(&state_lock); |
3329 | } | |
1da177e4 | 3330 | |
02e1215f JL |
3331 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
3332 | { | |
3333 | /* | |
3334 | * We're assuming the state code never drops its reference | |
3335 | * without first removing the lease. Since we're in this lease | |
3336 | * callback (and since the lease code is serialized by the kernel | |
3337 | * lock) we know the server hasn't removed the lease yet, we know | |
3338 | * it's safe to take a reference. | |
3339 | */ | |
72c0b0fb | 3340 | atomic_inc(&dp->dl_stid.sc_count); |
6b57d9c8 BF |
3341 | nfsd4_cb_recall(dp); |
3342 | } | |
3343 | ||
1c8c601a | 3344 | /* Called from break_lease() with i_lock held. */ |
6b57d9c8 BF |
3345 | static void nfsd_break_deleg_cb(struct file_lock *fl) |
3346 | { | |
acfdf5c3 BF |
3347 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
3348 | struct nfs4_delegation *dp; | |
6b57d9c8 | 3349 | |
7fa10cd1 BF |
3350 | if (!fp) { |
3351 | WARN(1, "(%p)->fl_owner NULL\n", fl); | |
3352 | return; | |
3353 | } | |
3354 | if (fp->fi_had_conflict) { | |
3355 | WARN(1, "duplicate break on %p\n", fp); | |
3356 | return; | |
3357 | } | |
0272e1fd BF |
3358 | /* |
3359 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 3360 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 3361 | * in time: |
0272e1fd BF |
3362 | */ |
3363 | fl->fl_break_time = 0; | |
1da177e4 | 3364 | |
02e1215f | 3365 | spin_lock(&fp->fi_lock); |
417c6629 JL |
3366 | fp->fi_had_conflict = true; |
3367 | /* | |
3368 | * If there are no delegations on the list, then we can't count on this | |
3369 | * lease ever being cleaned up. Set the fl_break_time to jiffies so that | |
3370 | * time_out_leases will do it ASAP. The fact that fi_had_conflict is now | |
3371 | * true should keep any new delegations from being hashed. | |
3372 | */ | |
3373 | if (list_empty(&fp->fi_delegations)) | |
3374 | fl->fl_break_time = jiffies; | |
3375 | else | |
3376 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
3377 | nfsd_break_one_deleg(dp); | |
02e1215f | 3378 | spin_unlock(&fp->fi_lock); |
1da177e4 LT |
3379 | } |
3380 | ||
1da177e4 LT |
3381 | static |
3382 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
3383 | { | |
3384 | if (arg & F_UNLCK) | |
3385 | return lease_modify(onlist, arg); | |
3386 | else | |
3387 | return -EAGAIN; | |
3388 | } | |
3389 | ||
7b021967 | 3390 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
3391 | .lm_break = nfsd_break_deleg_cb, |
3392 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
3393 | }; |
3394 | ||
7a8711c9 BF |
3395 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
3396 | { | |
3397 | if (nfsd4_has_session(cstate)) | |
3398 | return nfs_ok; | |
3399 | if (seqid == so->so_seqid - 1) | |
3400 | return nfserr_replay_me; | |
3401 | if (seqid == so->so_seqid) | |
3402 | return nfs_ok; | |
3403 | return nfserr_bad_seqid; | |
3404 | } | |
1da177e4 | 3405 | |
4b24ca7d JL |
3406 | static __be32 lookup_clientid(clientid_t *clid, |
3407 | struct nfsd4_compound_state *cstate, | |
3408 | struct nfsd_net *nn) | |
3409 | { | |
3410 | struct nfs4_client *found; | |
3411 | ||
3412 | if (cstate->clp) { | |
3413 | found = cstate->clp; | |
3414 | if (!same_clid(&found->cl_clientid, clid)) | |
3415 | return nfserr_stale_clientid; | |
3416 | return nfs_ok; | |
3417 | } | |
3418 | ||
3419 | if (STALE_CLIENTID(clid, nn)) | |
3420 | return nfserr_stale_clientid; | |
3421 | ||
3422 | /* | |
3423 | * For v4.1+ we get the client in the SEQUENCE op. If we don't have one | |
3424 | * cached already then we know this is for is for v4.0 and "sessions" | |
3425 | * will be false. | |
3426 | */ | |
3427 | WARN_ON_ONCE(cstate->session); | |
3428 | found = find_confirmed_client(clid, false, nn); | |
3429 | if (!found) | |
3430 | return nfserr_expired; | |
3431 | ||
3432 | /* Cache the nfs4_client in cstate! */ | |
3433 | cstate->clp = found; | |
3434 | atomic_inc(&found->cl_refcount); | |
3435 | return nfs_ok; | |
3436 | } | |
3437 | ||
b37ad28b | 3438 | __be32 |
6668958f | 3439 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
3320fef1 | 3440 | struct nfsd4_open *open, struct nfsd_net *nn) |
1da177e4 | 3441 | { |
1da177e4 LT |
3442 | clientid_t *clientid = &open->op_clientid; |
3443 | struct nfs4_client *clp = NULL; | |
3444 | unsigned int strhashval; | |
fe0750e5 | 3445 | struct nfs4_openowner *oo = NULL; |
4cdc951b | 3446 | __be32 status; |
1da177e4 | 3447 | |
2c142baa | 3448 | if (STALE_CLIENTID(&open->op_clientid, nn)) |
1da177e4 | 3449 | return nfserr_stale_clientid; |
32513b40 BF |
3450 | /* |
3451 | * In case we need it later, after we've already created the | |
3452 | * file and don't want to risk a further failure: | |
3453 | */ | |
3454 | open->op_file = nfsd4_alloc_file(); | |
3455 | if (open->op_file == NULL) | |
3456 | return nfserr_jukebox; | |
1da177e4 | 3457 | |
2d91e895 TM |
3458 | status = lookup_clientid(clientid, cstate, nn); |
3459 | if (status) | |
3460 | return status; | |
3461 | clp = cstate->clp; | |
3462 | ||
d4f0489f TM |
3463 | strhashval = ownerstr_hashval(&open->op_owner); |
3464 | oo = find_openstateowner_str(strhashval, open, clp); | |
fe0750e5 BF |
3465 | open->op_openowner = oo; |
3466 | if (!oo) { | |
bcf130f9 | 3467 | goto new_owner; |
1da177e4 | 3468 | } |
dad1c067 | 3469 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
0f442aa2 | 3470 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
3471 | release_openowner(oo); |
3472 | open->op_openowner = NULL; | |
bcf130f9 | 3473 | goto new_owner; |
0f442aa2 | 3474 | } |
4cdc951b BF |
3475 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
3476 | if (status) | |
3477 | return status; | |
4cdc951b | 3478 | goto alloc_stateid; |
bcf130f9 | 3479 | new_owner: |
13d6f66b | 3480 | oo = alloc_init_open_stateowner(strhashval, open, cstate); |
bcf130f9 BF |
3481 | if (oo == NULL) |
3482 | return nfserr_jukebox; | |
3483 | open->op_openowner = oo; | |
4cdc951b | 3484 | alloc_stateid: |
b49e084d | 3485 | open->op_stp = nfs4_alloc_open_stateid(clp); |
4cdc951b BF |
3486 | if (!open->op_stp) |
3487 | return nfserr_jukebox; | |
0f442aa2 | 3488 | return nfs_ok; |
1da177e4 LT |
3489 | } |
3490 | ||
b37ad28b | 3491 | static inline __be32 |
4a6e43e6 N |
3492 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
3493 | { | |
3494 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
3495 | return nfserr_openmode; | |
3496 | else | |
3497 | return nfs_ok; | |
3498 | } | |
3499 | ||
f459e453 | 3500 | static int share_access_to_flags(u32 share_access) |
52f4fb43 | 3501 | { |
f459e453 | 3502 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
52f4fb43 N |
3503 | } |
3504 | ||
38c2f4b1 | 3505 | static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) |
24a0111e | 3506 | { |
f459e453 | 3507 | struct nfs4_stid *ret; |
24a0111e | 3508 | |
38c2f4b1 | 3509 | ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); |
f459e453 BF |
3510 | if (!ret) |
3511 | return NULL; | |
3512 | return delegstateid(ret); | |
24a0111e BF |
3513 | } |
3514 | ||
8b289b2c BF |
3515 | static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) |
3516 | { | |
3517 | return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || | |
3518 | open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; | |
3519 | } | |
3520 | ||
b37ad28b | 3521 | static __be32 |
41d22663 | 3522 | nfs4_check_deleg(struct nfs4_client *cl, struct nfsd4_open *open, |
567d9829 N |
3523 | struct nfs4_delegation **dp) |
3524 | { | |
3525 | int flags; | |
b37ad28b | 3526 | __be32 status = nfserr_bad_stateid; |
dcd94cc2 | 3527 | struct nfs4_delegation *deleg; |
567d9829 | 3528 | |
dcd94cc2 TM |
3529 | deleg = find_deleg_stateid(cl, &open->op_delegate_stateid); |
3530 | if (deleg == NULL) | |
c44c5eeb | 3531 | goto out; |
24a0111e | 3532 | flags = share_access_to_flags(open->op_share_access); |
dcd94cc2 TM |
3533 | status = nfs4_check_delegmode(deleg, flags); |
3534 | if (status) { | |
3535 | nfs4_put_stid(&deleg->dl_stid); | |
3536 | goto out; | |
3537 | } | |
3538 | *dp = deleg; | |
c44c5eeb | 3539 | out: |
8b289b2c | 3540 | if (!nfsd4_is_deleg_cur(open)) |
c44c5eeb N |
3541 | return nfs_ok; |
3542 | if (status) | |
3543 | return status; | |
dad1c067 | 3544 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
c44c5eeb | 3545 | return nfs_ok; |
567d9829 N |
3546 | } |
3547 | ||
a46cb7f2 JL |
3548 | static struct nfs4_ol_stateid * |
3549 | nfsd4_find_existing_open(struct nfs4_file *fp, struct nfsd4_open *open) | |
1da177e4 | 3550 | { |
a46cb7f2 | 3551 | struct nfs4_ol_stateid *local, *ret = NULL; |
fe0750e5 | 3552 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 3553 | |
1d31a253 | 3554 | spin_lock(&fp->fi_lock); |
8beefa24 | 3555 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
3556 | /* ignore lock owners */ |
3557 | if (local->st_stateowner->so_is_open_owner == 0) | |
3558 | continue; | |
baeb4ff0 | 3559 | if (local->st_stateowner == &oo->oo_owner) { |
a46cb7f2 | 3560 | ret = local; |
d6f2bc5d | 3561 | atomic_inc(&ret->st_stid.sc_count); |
baeb4ff0 | 3562 | break; |
1d31a253 | 3563 | } |
1da177e4 | 3564 | } |
1d31a253 | 3565 | spin_unlock(&fp->fi_lock); |
a46cb7f2 | 3566 | return ret; |
1da177e4 LT |
3567 | } |
3568 | ||
21fb4016 BF |
3569 | static inline int nfs4_access_to_access(u32 nfs4_access) |
3570 | { | |
3571 | int flags = 0; | |
3572 | ||
3573 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
3574 | flags |= NFSD_MAY_READ; | |
3575 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
3576 | flags |= NFSD_MAY_WRITE; | |
3577 | return flags; | |
3578 | } | |
3579 | ||
7e6a72e5 CH |
3580 | static inline __be32 |
3581 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, | |
3582 | struct nfsd4_open *open) | |
3583 | { | |
3584 | struct iattr iattr = { | |
3585 | .ia_valid = ATTR_SIZE, | |
3586 | .ia_size = 0, | |
3587 | }; | |
3588 | if (!open->op_truncate) | |
3589 | return 0; | |
3590 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
3591 | return nfserr_inval; | |
3592 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); | |
3593 | } | |
3594 | ||
0c12eaff | 3595 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
6eb3a1d0 JL |
3596 | struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp, |
3597 | struct nfsd4_open *open) | |
f9d7562f | 3598 | { |
de18643d | 3599 | struct file *filp = NULL; |
f9d7562f | 3600 | __be32 status; |
0c12eaff CB |
3601 | int oflag = nfs4_access_to_omode(open->op_share_access); |
3602 | int access = nfs4_access_to_access(open->op_share_access); | |
baeb4ff0 | 3603 | unsigned char old_access_bmap, old_deny_bmap; |
0c12eaff | 3604 | |
de18643d | 3605 | spin_lock(&fp->fi_lock); |
baeb4ff0 JL |
3606 | |
3607 | /* | |
3608 | * Are we trying to set a deny mode that would conflict with | |
3609 | * current access? | |
3610 | */ | |
3611 | status = nfs4_file_check_deny(fp, open->op_share_deny); | |
3612 | if (status != nfs_ok) { | |
3613 | spin_unlock(&fp->fi_lock); | |
3614 | goto out; | |
3615 | } | |
3616 | ||
3617 | /* set access to the file */ | |
3618 | status = nfs4_file_get_access(fp, open->op_share_access); | |
3619 | if (status != nfs_ok) { | |
3620 | spin_unlock(&fp->fi_lock); | |
3621 | goto out; | |
3622 | } | |
3623 | ||
3624 | /* Set access bits in stateid */ | |
3625 | old_access_bmap = stp->st_access_bmap; | |
3626 | set_access(open->op_share_access, stp); | |
3627 | ||
3628 | /* Set new deny mask */ | |
3629 | old_deny_bmap = stp->st_deny_bmap; | |
3630 | set_deny(open->op_share_deny, stp); | |
3631 | fp->fi_share_deny |= (open->op_share_deny & NFS4_SHARE_DENY_BOTH); | |
3632 | ||
f9d7562f | 3633 | if (!fp->fi_fds[oflag]) { |
de18643d TM |
3634 | spin_unlock(&fp->fi_lock); |
3635 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, &filp); | |
f9d7562f | 3636 | if (status) |
baeb4ff0 | 3637 | goto out_put_access; |
de18643d TM |
3638 | spin_lock(&fp->fi_lock); |
3639 | if (!fp->fi_fds[oflag]) { | |
3640 | fp->fi_fds[oflag] = filp; | |
3641 | filp = NULL; | |
3642 | } | |
f9d7562f | 3643 | } |
de18643d TM |
3644 | spin_unlock(&fp->fi_lock); |
3645 | if (filp) | |
3646 | fput(filp); | |
f9d7562f | 3647 | |
7e6a72e5 CH |
3648 | status = nfsd4_truncate(rqstp, cur_fh, open); |
3649 | if (status) | |
3650 | goto out_put_access; | |
7e6a72e5 CH |
3651 | out: |
3652 | return status; | |
baeb4ff0 JL |
3653 | out_put_access: |
3654 | stp->st_access_bmap = old_access_bmap; | |
3655 | nfs4_file_put_access(fp, open->op_share_access); | |
3656 | reset_union_bmap_deny(bmap_to_share_mode(old_deny_bmap), stp); | |
3657 | goto out; | |
1da177e4 LT |
3658 | } |
3659 | ||
b37ad28b | 3660 | static __be32 |
dcef0413 | 3661 | 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 | 3662 | { |
b37ad28b | 3663 | __be32 status; |
baeb4ff0 | 3664 | unsigned char old_deny_bmap; |
1da177e4 | 3665 | |
6eb3a1d0 | 3666 | if (!test_access(open->op_share_access, stp)) |
baeb4ff0 | 3667 | return nfs4_get_vfs_file(rqstp, fp, cur_fh, stp, open); |
7e6a72e5 | 3668 | |
baeb4ff0 JL |
3669 | /* test and set deny mode */ |
3670 | spin_lock(&fp->fi_lock); | |
3671 | status = nfs4_file_check_deny(fp, open->op_share_deny); | |
3672 | if (status == nfs_ok) { | |
3673 | old_deny_bmap = stp->st_deny_bmap; | |
3674 | set_deny(open->op_share_deny, stp); | |
3675 | fp->fi_share_deny |= | |
3676 | (open->op_share_deny & NFS4_SHARE_DENY_BOTH); | |
3677 | } | |
3678 | spin_unlock(&fp->fi_lock); | |
3679 | ||
3680 | if (status != nfs_ok) | |
1da177e4 | 3681 | return status; |
1da177e4 | 3682 | |
baeb4ff0 JL |
3683 | status = nfsd4_truncate(rqstp, cur_fh, open); |
3684 | if (status != nfs_ok) | |
3685 | reset_union_bmap_deny(old_deny_bmap, stp); | |
3686 | return status; | |
3687 | } | |
1da177e4 | 3688 | |
1da177e4 | 3689 | static void |
1255a8f3 | 3690 | nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session) |
1da177e4 | 3691 | { |
dad1c067 | 3692 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
1da177e4 LT |
3693 | } |
3694 | ||
14a24e99 BF |
3695 | /* Should we give out recallable state?: */ |
3696 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
3697 | { | |
3698 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
3699 | return true; | |
3700 | /* | |
3701 | * In the sessions case, since we don't have to establish a | |
3702 | * separate connection for callbacks, we assume it's OK | |
3703 | * until we hear otherwise: | |
3704 | */ | |
3705 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
3706 | } | |
3707 | ||
d564fbec | 3708 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_file *fp, int flag) |
22d38c4c BF |
3709 | { |
3710 | struct file_lock *fl; | |
3711 | ||
3712 | fl = locks_alloc_lock(); | |
3713 | if (!fl) | |
3714 | return NULL; | |
3715 | locks_init_lock(fl); | |
3716 | fl->fl_lmops = &nfsd_lease_mng_ops; | |
617588d5 | 3717 | fl->fl_flags = FL_DELEG; |
22d38c4c BF |
3718 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; |
3719 | fl->fl_end = OFFSET_MAX; | |
d564fbec | 3720 | fl->fl_owner = (fl_owner_t)fp; |
22d38c4c | 3721 | fl->fl_pid = current->tgid; |
22d38c4c BF |
3722 | return fl; |
3723 | } | |
3724 | ||
99c41515 | 3725 | static int nfs4_setlease(struct nfs4_delegation *dp) |
edab9782 | 3726 | { |
11b9164a | 3727 | struct nfs4_file *fp = dp->dl_stid.sc_file; |
edab9782 | 3728 | struct file_lock *fl; |
417c6629 JL |
3729 | struct file *filp; |
3730 | int status = 0; | |
edab9782 | 3731 | |
d564fbec | 3732 | fl = nfs4_alloc_init_lease(fp, NFS4_OPEN_DELEGATE_READ); |
edab9782 BF |
3733 | if (!fl) |
3734 | return -ENOMEM; | |
417c6629 JL |
3735 | filp = find_readable_file(fp); |
3736 | if (!filp) { | |
3737 | /* We should always have a readable file here */ | |
3738 | WARN_ON_ONCE(1); | |
3739 | return -EBADF; | |
3740 | } | |
3741 | fl->fl_file = filp; | |
3742 | status = vfs_setlease(filp, fl->fl_type, &fl); | |
3743 | if (status) { | |
3744 | locks_free_lock(fl); | |
3745 | goto out_fput; | |
3746 | } | |
3747 | spin_lock(&state_lock); | |
3748 | spin_lock(&fp->fi_lock); | |
3749 | /* Did the lease get broken before we took the lock? */ | |
3750 | status = -EAGAIN; | |
3751 | if (fp->fi_had_conflict) | |
3752 | goto out_unlock; | |
3753 | /* Race breaker */ | |
3754 | if (fp->fi_lease) { | |
3755 | status = 0; | |
3756 | atomic_inc(&fp->fi_delegees); | |
3757 | hash_delegation_locked(dp, fp); | |
3758 | goto out_unlock; | |
3759 | } | |
acfdf5c3 | 3760 | fp->fi_lease = fl; |
417c6629 | 3761 | fp->fi_deleg_file = filp; |
acfdf5c3 | 3762 | atomic_set(&fp->fi_delegees, 1); |
931ee56c | 3763 | hash_delegation_locked(dp, fp); |
417c6629 | 3764 | spin_unlock(&fp->fi_lock); |
cdc97505 | 3765 | spin_unlock(&state_lock); |
acfdf5c3 | 3766 | return 0; |
417c6629 JL |
3767 | out_unlock: |
3768 | spin_unlock(&fp->fi_lock); | |
3769 | spin_unlock(&state_lock); | |
3770 | out_fput: | |
3771 | fput(filp); | |
e873088f | 3772 | return status; |
acfdf5c3 BF |
3773 | } |
3774 | ||
0b26693c JL |
3775 | static struct nfs4_delegation * |
3776 | nfs4_set_delegation(struct nfs4_client *clp, struct svc_fh *fh, | |
3777 | struct nfs4_file *fp) | |
acfdf5c3 | 3778 | { |
0b26693c JL |
3779 | int status; |
3780 | struct nfs4_delegation *dp; | |
417c6629 | 3781 | |
bf7bd3e9 | 3782 | if (fp->fi_had_conflict) |
0b26693c JL |
3783 | return ERR_PTR(-EAGAIN); |
3784 | ||
3785 | dp = alloc_init_deleg(clp, fh); | |
3786 | if (!dp) | |
3787 | return ERR_PTR(-ENOMEM); | |
3788 | ||
bf7bd3e9 | 3789 | get_nfs4_file(fp); |
417c6629 JL |
3790 | spin_lock(&state_lock); |
3791 | spin_lock(&fp->fi_lock); | |
11b9164a | 3792 | dp->dl_stid.sc_file = fp; |
417c6629 JL |
3793 | if (!fp->fi_lease) { |
3794 | spin_unlock(&fp->fi_lock); | |
3795 | spin_unlock(&state_lock); | |
0b26693c JL |
3796 | status = nfs4_setlease(dp); |
3797 | goto out; | |
417c6629 | 3798 | } |
cbf7a75b | 3799 | atomic_inc(&fp->fi_delegees); |
acfdf5c3 | 3800 | if (fp->fi_had_conflict) { |
417c6629 JL |
3801 | status = -EAGAIN; |
3802 | goto out_unlock; | |
acfdf5c3 | 3803 | } |
931ee56c | 3804 | hash_delegation_locked(dp, fp); |
0b26693c | 3805 | status = 0; |
417c6629 JL |
3806 | out_unlock: |
3807 | spin_unlock(&fp->fi_lock); | |
cdc97505 | 3808 | spin_unlock(&state_lock); |
0b26693c JL |
3809 | out: |
3810 | if (status) { | |
6011695d | 3811 | nfs4_put_stid(&dp->dl_stid); |
0b26693c JL |
3812 | return ERR_PTR(status); |
3813 | } | |
3814 | return dp; | |
edab9782 BF |
3815 | } |
3816 | ||
4aa8913c BH |
3817 | static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) |
3818 | { | |
3819 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3820 | if (status == -EAGAIN) | |
3821 | open->op_why_no_deleg = WND4_CONTENTION; | |
3822 | else { | |
3823 | open->op_why_no_deleg = WND4_RESOURCE; | |
3824 | switch (open->op_deleg_want) { | |
3825 | case NFS4_SHARE_WANT_READ_DELEG: | |
3826 | case NFS4_SHARE_WANT_WRITE_DELEG: | |
3827 | case NFS4_SHARE_WANT_ANY_DELEG: | |
3828 | break; | |
3829 | case NFS4_SHARE_WANT_CANCEL: | |
3830 | open->op_why_no_deleg = WND4_CANCELLED; | |
3831 | break; | |
3832 | case NFS4_SHARE_WANT_NO_DELEG: | |
063b0fb9 | 3833 | WARN_ON_ONCE(1); |
4aa8913c BH |
3834 | } |
3835 | } | |
3836 | } | |
3837 | ||
1da177e4 LT |
3838 | /* |
3839 | * Attempt to hand out a delegation. | |
99c41515 BF |
3840 | * |
3841 | * Note we don't support write delegations, and won't until the vfs has | |
3842 | * proper support for them. | |
1da177e4 LT |
3843 | */ |
3844 | static void | |
4cf59221 JL |
3845 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, |
3846 | struct nfs4_ol_stateid *stp) | |
1da177e4 LT |
3847 | { |
3848 | struct nfs4_delegation *dp; | |
4cf59221 JL |
3849 | struct nfs4_openowner *oo = openowner(stp->st_stateowner); |
3850 | struct nfs4_client *clp = stp->st_stid.sc_client; | |
14a24e99 | 3851 | int cb_up; |
99c41515 | 3852 | int status = 0; |
1da177e4 | 3853 | |
fe0750e5 | 3854 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
7b190fec N |
3855 | open->op_recall = 0; |
3856 | switch (open->op_claim_type) { | |
3857 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 3858 | if (!cb_up) |
7b190fec | 3859 | open->op_recall = 1; |
99c41515 BF |
3860 | if (open->op_delegate_type != NFS4_OPEN_DELEGATE_READ) |
3861 | goto out_no_deleg; | |
7b190fec N |
3862 | break; |
3863 | case NFS4_OPEN_CLAIM_NULL: | |
ed47b062 | 3864 | case NFS4_OPEN_CLAIM_FH: |
99c41515 BF |
3865 | /* |
3866 | * Let's not give out any delegations till everyone's | |
3867 | * had the chance to reclaim theirs.... | |
3868 | */ | |
4cf59221 | 3869 | if (locks_in_grace(clp->net)) |
99c41515 | 3870 | goto out_no_deleg; |
dad1c067 | 3871 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
99c41515 | 3872 | goto out_no_deleg; |
9a0590ae SD |
3873 | /* |
3874 | * Also, if the file was opened for write or | |
3875 | * create, there's a good chance the client's | |
3876 | * about to write to it, resulting in an | |
3877 | * immediate recall (since we don't support | |
3878 | * write delegations): | |
3879 | */ | |
7b190fec | 3880 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
99c41515 BF |
3881 | goto out_no_deleg; |
3882 | if (open->op_create == NFS4_OPEN_CREATE) | |
3883 | goto out_no_deleg; | |
7b190fec N |
3884 | break; |
3885 | default: | |
99c41515 | 3886 | goto out_no_deleg; |
7b190fec | 3887 | } |
11b9164a | 3888 | dp = nfs4_set_delegation(clp, fh, stp->st_stid.sc_file); |
0b26693c | 3889 | if (IS_ERR(dp)) |
dd239cc0 | 3890 | goto out_no_deleg; |
1da177e4 | 3891 | |
d5477a8d | 3892 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 3893 | |
8c10cbdb | 3894 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
d5477a8d | 3895 | STATEID_VAL(&dp->dl_stid.sc_stateid)); |
99c41515 | 3896 | open->op_delegate_type = NFS4_OPEN_DELEGATE_READ; |
67cb1279 | 3897 | nfs4_put_stid(&dp->dl_stid); |
dd239cc0 | 3898 | return; |
dd239cc0 | 3899 | out_no_deleg: |
99c41515 BF |
3900 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE; |
3901 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && | |
d08d32e6 | 3902 | open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) { |
99c41515 | 3903 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
d08d32e6 BF |
3904 | open->op_recall = 1; |
3905 | } | |
99c41515 BF |
3906 | |
3907 | /* 4.1 client asking for a delegation? */ | |
3908 | if (open->op_deleg_want) | |
3909 | nfsd4_open_deleg_none_ext(open, status); | |
3910 | return; | |
1da177e4 LT |
3911 | } |
3912 | ||
e27f49c3 BH |
3913 | static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, |
3914 | struct nfs4_delegation *dp) | |
3915 | { | |
3916 | if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && | |
3917 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
3918 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3919 | open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; | |
3920 | } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && | |
3921 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
3922 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3923 | open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; | |
3924 | } | |
3925 | /* Otherwise the client must be confused wanting a delegation | |
3926 | * it already has, therefore we don't return | |
3927 | * NFS4_OPEN_DELEGATE_NONE_EXT and reason. | |
3928 | */ | |
3929 | } | |
3930 | ||
1da177e4 LT |
3931 | /* |
3932 | * called with nfs4_lock_state() held. | |
3933 | */ | |
b37ad28b | 3934 | __be32 |
1da177e4 LT |
3935 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
3936 | { | |
6668958f | 3937 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
38c2f4b1 | 3938 | struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; |
1da177e4 | 3939 | struct nfs4_file *fp = NULL; |
dcef0413 | 3940 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 3941 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 3942 | __be32 status; |
1da177e4 | 3943 | |
1da177e4 LT |
3944 | /* |
3945 | * Lookup file; if found, lookup stateid and check open request, | |
3946 | * and check for delegations in the process of being recalled. | |
3947 | * If not found, create the nfs4_file struct | |
3948 | */ | |
f9c00c3a | 3949 | fp = find_or_add_file(open->op_file, ¤t_fh->fh_handle); |
950e0118 | 3950 | if (fp != open->op_file) { |
41d22663 | 3951 | status = nfs4_check_deleg(cl, open, &dp); |
c44c5eeb N |
3952 | if (status) |
3953 | goto out; | |
a46cb7f2 | 3954 | stp = nfsd4_find_existing_open(fp, open); |
1da177e4 | 3955 | } else { |
950e0118 | 3956 | open->op_file = NULL; |
c44c5eeb | 3957 | status = nfserr_bad_stateid; |
8b289b2c | 3958 | if (nfsd4_is_deleg_cur(open)) |
c44c5eeb | 3959 | goto out; |
3e772463 | 3960 | status = nfserr_jukebox; |
1da177e4 LT |
3961 | } |
3962 | ||
3963 | /* | |
3964 | * OPEN the file, or upgrade an existing OPEN. | |
3965 | * If truncate fails, the OPEN fails. | |
3966 | */ | |
3967 | if (stp) { | |
3968 | /* Stateid was found, this is an OPEN upgrade */ | |
f9d7562f | 3969 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
1da177e4 LT |
3970 | if (status) |
3971 | goto out; | |
3972 | } else { | |
4cdc951b BF |
3973 | stp = open->op_stp; |
3974 | open->op_stp = NULL; | |
996e0938 | 3975 | init_open_stateid(stp, fp, open); |
6eb3a1d0 JL |
3976 | status = nfs4_get_vfs_file(rqstp, fp, current_fh, stp, open); |
3977 | if (status) { | |
3978 | release_open_stateid(stp); | |
3979 | goto out; | |
3980 | } | |
1da177e4 | 3981 | } |
dcef0413 BF |
3982 | update_stateid(&stp->st_stid.sc_stateid); |
3983 | memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3984 | |
d24433cd | 3985 | if (nfsd4_has_session(&resp->cstate)) { |
d24433cd BH |
3986 | if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { |
3987 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3988 | open->op_why_no_deleg = WND4_NOT_WANTED; | |
3989 | goto nodeleg; | |
3990 | } | |
3991 | } | |
3992 | ||
1da177e4 LT |
3993 | /* |
3994 | * Attempt to hand out a delegation. No error return, because the | |
3995 | * OPEN succeeds even if we fail. | |
3996 | */ | |
4cf59221 | 3997 | nfs4_open_delegation(current_fh, open, stp); |
d24433cd | 3998 | nodeleg: |
1da177e4 LT |
3999 | status = nfs_ok; |
4000 | ||
8c10cbdb | 4001 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
dcef0413 | 4002 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
1da177e4 | 4003 | out: |
d24433cd BH |
4004 | /* 4.1 client trying to upgrade/downgrade delegation? */ |
4005 | if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && | |
e27f49c3 BH |
4006 | open->op_deleg_want) |
4007 | nfsd4_deleg_xgrade_none_ext(open, dp); | |
d24433cd | 4008 | |
13cd2184 N |
4009 | if (fp) |
4010 | put_nfs4_file(fp); | |
37515177 | 4011 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
1255a8f3 | 4012 | nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate)); |
1da177e4 LT |
4013 | /* |
4014 | * To finish the open response, we just need to set the rflags. | |
4015 | */ | |
4016 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
dad1c067 | 4017 | if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && |
6668958f | 4018 | !nfsd4_has_session(&resp->cstate)) |
1da177e4 | 4019 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
dcd94cc2 TM |
4020 | if (dp) |
4021 | nfs4_put_stid(&dp->dl_stid); | |
d6f2bc5d TM |
4022 | if (stp) |
4023 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 LT |
4024 | |
4025 | return status; | |
4026 | } | |
4027 | ||
58fb12e6 JL |
4028 | void nfsd4_cleanup_open_state(struct nfsd4_compound_state *cstate, |
4029 | struct nfsd4_open *open, __be32 status) | |
d29b20cd BF |
4030 | { |
4031 | if (open->op_openowner) { | |
d3134b10 JL |
4032 | struct nfs4_stateowner *so = &open->op_openowner->oo_owner; |
4033 | ||
4034 | nfsd4_cstate_assign_replay(cstate, so); | |
4035 | nfs4_put_stateowner(so); | |
d29b20cd | 4036 | } |
32513b40 BF |
4037 | if (open->op_file) |
4038 | nfsd4_free_file(open->op_file); | |
4cdc951b | 4039 | if (open->op_stp) |
6011695d | 4040 | nfs4_put_stid(&open->op_stp->st_stid); |
d29b20cd BF |
4041 | } |
4042 | ||
b37ad28b | 4043 | __be32 |
b591480b BF |
4044 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4045 | clientid_t *clid) | |
1da177e4 LT |
4046 | { |
4047 | struct nfs4_client *clp; | |
b37ad28b | 4048 | __be32 status; |
7f2210fa | 4049 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
4050 | |
4051 | nfs4_lock_state(); | |
4052 | dprintk("process_renew(%08x/%08x): starting\n", | |
4053 | clid->cl_boot, clid->cl_id); | |
4b24ca7d | 4054 | status = lookup_clientid(clid, cstate, nn); |
9b2ef62b | 4055 | if (status) |
1da177e4 | 4056 | goto out; |
4b24ca7d | 4057 | clp = cstate->clp; |
1da177e4 | 4058 | status = nfserr_cb_path_down; |
ea1da636 | 4059 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 4060 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
4061 | goto out; |
4062 | status = nfs_ok; | |
4063 | out: | |
4064 | nfs4_unlock_state(); | |
4065 | return status; | |
4066 | } | |
4067 | ||
a76b4319 | 4068 | static void |
12760c66 | 4069 | nfsd4_end_grace(struct nfsd_net *nn) |
a76b4319 | 4070 | { |
33dcc481 | 4071 | /* do nothing if grace period already ended */ |
a51c84ed | 4072 | if (nn->grace_ended) |
33dcc481 JL |
4073 | return; |
4074 | ||
a76b4319 | 4075 | dprintk("NFSD: end of grace period\n"); |
a51c84ed | 4076 | nn->grace_ended = true; |
12760c66 | 4077 | nfsd4_record_grace_done(nn, nn->boot_time); |
5e1533c7 | 4078 | locks_end_grace(&nn->nfsd4_manager); |
e46b498c BF |
4079 | /* |
4080 | * Now that every NFSv4 client has had the chance to recover and | |
4081 | * to see the (possibly new, possibly shorter) lease time, we | |
4082 | * can safely set the next grace time to the current lease time: | |
4083 | */ | |
5284b44e | 4084 | nn->nfsd4_grace = nn->nfsd4_lease; |
a76b4319 N |
4085 | } |
4086 | ||
fd39ca9a | 4087 | static time_t |
09121281 | 4088 | nfs4_laundromat(struct nfsd_net *nn) |
1da177e4 LT |
4089 | { |
4090 | struct nfs4_client *clp; | |
fe0750e5 | 4091 | struct nfs4_openowner *oo; |
1da177e4 LT |
4092 | struct nfs4_delegation *dp; |
4093 | struct list_head *pos, *next, reaplist; | |
3d733711 | 4094 | time_t cutoff = get_seconds() - nn->nfsd4_lease; |
a832e7ae | 4095 | time_t t, new_timeo = nn->nfsd4_lease; |
1da177e4 LT |
4096 | |
4097 | nfs4_lock_state(); | |
4098 | ||
4099 | dprintk("NFSD: laundromat service - starting\n"); | |
12760c66 | 4100 | nfsd4_end_grace(nn); |
36acb66b | 4101 | INIT_LIST_HEAD(&reaplist); |
c9a49628 | 4102 | spin_lock(&nn->client_lock); |
5ed58bb2 | 4103 | list_for_each_safe(pos, next, &nn->client_lru) { |
1da177e4 LT |
4104 | clp = list_entry(pos, struct nfs4_client, cl_lru); |
4105 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
4106 | t = clp->cl_time - cutoff; | |
a832e7ae | 4107 | new_timeo = min(new_timeo, t); |
1da177e4 LT |
4108 | break; |
4109 | } | |
221a6876 | 4110 | if (mark_client_expired_locked(clp)) { |
d7682988 BH |
4111 | dprintk("NFSD: client in use (clientid %08x)\n", |
4112 | clp->cl_clientid.cl_id); | |
4113 | continue; | |
4114 | } | |
4864af97 TM |
4115 | unhash_client_locked(clp); |
4116 | list_add(&clp->cl_lru, &reaplist); | |
36acb66b | 4117 | } |
c9a49628 | 4118 | spin_unlock(&nn->client_lock); |
36acb66b BH |
4119 | list_for_each_safe(pos, next, &reaplist) { |
4120 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
4121 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
4122 | clp->cl_clientid.cl_id); | |
4864af97 | 4123 | list_del_init(&clp->cl_lru); |
1da177e4 LT |
4124 | expire_client(clp); |
4125 | } | |
cdc97505 | 4126 | spin_lock(&state_lock); |
e8c69d17 | 4127 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 | 4128 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
4e37a7c2 SK |
4129 | if (net_generic(dp->dl_stid.sc_client->net, nfsd_net_id) != nn) |
4130 | continue; | |
1da177e4 | 4131 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { |
a832e7ae JL |
4132 | t = dp->dl_time - cutoff; |
4133 | new_timeo = min(new_timeo, t); | |
1da177e4 LT |
4134 | break; |
4135 | } | |
42690676 JL |
4136 | unhash_delegation_locked(dp); |
4137 | list_add(&dp->dl_recall_lru, &reaplist); | |
1da177e4 | 4138 | } |
cdc97505 | 4139 | spin_unlock(&state_lock); |
2d4a532d JL |
4140 | while (!list_empty(&reaplist)) { |
4141 | dp = list_first_entry(&reaplist, struct nfs4_delegation, | |
4142 | dl_recall_lru); | |
4143 | list_del_init(&dp->dl_recall_lru); | |
3bd64a5b | 4144 | revoke_delegation(dp); |
1da177e4 | 4145 | } |
73758fed | 4146 | list_for_each_safe(pos, next, &nn->close_lru) { |
fe0750e5 BF |
4147 | oo = container_of(pos, struct nfs4_openowner, oo_close_lru); |
4148 | if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { | |
a832e7ae JL |
4149 | t = oo->oo_time - cutoff; |
4150 | new_timeo = min(new_timeo, t); | |
1da177e4 LT |
4151 | break; |
4152 | } | |
d3134b10 | 4153 | release_last_closed_stateid(oo); |
1da177e4 | 4154 | } |
a832e7ae | 4155 | new_timeo = max_t(time_t, new_timeo, NFSD_LAUNDROMAT_MINTIMEOUT); |
1da177e4 | 4156 | nfs4_unlock_state(); |
a832e7ae | 4157 | return new_timeo; |
1da177e4 LT |
4158 | } |
4159 | ||
a254b246 HH |
4160 | static struct workqueue_struct *laundry_wq; |
4161 | static void laundromat_main(struct work_struct *); | |
a254b246 HH |
4162 | |
4163 | static void | |
09121281 | 4164 | laundromat_main(struct work_struct *laundry) |
1da177e4 LT |
4165 | { |
4166 | time_t t; | |
09121281 SK |
4167 | struct delayed_work *dwork = container_of(laundry, struct delayed_work, |
4168 | work); | |
4169 | struct nfsd_net *nn = container_of(dwork, struct nfsd_net, | |
4170 | laundromat_work); | |
1da177e4 | 4171 | |
09121281 | 4172 | t = nfs4_laundromat(nn); |
1da177e4 | 4173 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); |
09121281 | 4174 | queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ); |
1da177e4 LT |
4175 | } |
4176 | ||
f7a4d872 | 4177 | static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) |
1da177e4 | 4178 | { |
11b9164a | 4179 | if (!nfsd_fh_match(&fhp->fh_handle, &stp->st_stid.sc_file->fi_fhandle)) |
f7a4d872 BF |
4180 | return nfserr_bad_stateid; |
4181 | return nfs_ok; | |
1da177e4 LT |
4182 | } |
4183 | ||
1da177e4 | 4184 | static inline int |
82c5ff1b | 4185 | access_permit_read(struct nfs4_ol_stateid *stp) |
1da177e4 | 4186 | { |
82c5ff1b JL |
4187 | return test_access(NFS4_SHARE_ACCESS_READ, stp) || |
4188 | test_access(NFS4_SHARE_ACCESS_BOTH, stp) || | |
4189 | test_access(NFS4_SHARE_ACCESS_WRITE, stp); | |
1da177e4 LT |
4190 | } |
4191 | ||
4192 | static inline int | |
82c5ff1b | 4193 | access_permit_write(struct nfs4_ol_stateid *stp) |
1da177e4 | 4194 | { |
82c5ff1b JL |
4195 | return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || |
4196 | test_access(NFS4_SHARE_ACCESS_BOTH, stp); | |
1da177e4 LT |
4197 | } |
4198 | ||
4199 | static | |
dcef0413 | 4200 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
1da177e4 | 4201 | { |
b37ad28b | 4202 | __be32 status = nfserr_openmode; |
1da177e4 | 4203 | |
02921914 BF |
4204 | /* For lock stateid's, we test the parent open, not the lock: */ |
4205 | if (stp->st_openstp) | |
4206 | stp = stp->st_openstp; | |
82c5ff1b | 4207 | if ((flags & WR_STATE) && !access_permit_write(stp)) |
1da177e4 | 4208 | goto out; |
82c5ff1b | 4209 | if ((flags & RD_STATE) && !access_permit_read(stp)) |
1da177e4 LT |
4210 | goto out; |
4211 | status = nfs_ok; | |
4212 | out: | |
4213 | return status; | |
4214 | } | |
4215 | ||
b37ad28b | 4216 | static inline __be32 |
5ccb0066 | 4217 | check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags) |
1da177e4 | 4218 | { |
203a8c8e | 4219 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 4220 | return nfs_ok; |
5ccb0066 | 4221 | else if (locks_in_grace(net)) { |
25985edc | 4222 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
4223 | * conflicting state; so we must wait out the grace period. */ |
4224 | return nfserr_grace; | |
4225 | } else if (flags & WR_STATE) | |
4226 | return nfs4_share_conflict(current_fh, | |
4227 | NFS4_SHARE_DENY_WRITE); | |
4228 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
4229 | return nfs4_share_conflict(current_fh, | |
4230 | NFS4_SHARE_DENY_READ); | |
4231 | } | |
4232 | ||
4233 | /* | |
4234 | * Allow READ/WRITE during grace period on recovered state only for files | |
4235 | * that are not able to provide mandatory locking. | |
4236 | */ | |
4237 | static inline int | |
5ccb0066 | 4238 | grace_disallows_io(struct net *net, struct inode *inode) |
1da177e4 | 4239 | { |
5ccb0066 | 4240 | return locks_in_grace(net) && mandatory_lock(inode); |
1da177e4 LT |
4241 | } |
4242 | ||
81b82965 BF |
4243 | /* Returns true iff a is later than b: */ |
4244 | static bool stateid_generation_after(stateid_t *a, stateid_t *b) | |
4245 | { | |
1a9357f4 | 4246 | return (s32)(a->si_generation - b->si_generation) > 0; |
81b82965 BF |
4247 | } |
4248 | ||
57b7b43b | 4249 | static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 4250 | { |
6668958f AA |
4251 | /* |
4252 | * When sessions are used the stateid generation number is ignored | |
4253 | * when it is zero. | |
4254 | */ | |
28dde241 | 4255 | if (has_session && in->si_generation == 0) |
81b82965 BF |
4256 | return nfs_ok; |
4257 | ||
4258 | if (in->si_generation == ref->si_generation) | |
4259 | return nfs_ok; | |
6668958f | 4260 | |
0836f587 | 4261 | /* If the client sends us a stateid from the future, it's buggy: */ |
81b82965 | 4262 | if (stateid_generation_after(in, ref)) |
0836f587 BF |
4263 | return nfserr_bad_stateid; |
4264 | /* | |
81b82965 BF |
4265 | * However, we could see a stateid from the past, even from a |
4266 | * non-buggy client. For example, if the client sends a lock | |
4267 | * while some IO is outstanding, the lock may bump si_generation | |
4268 | * while the IO is still in flight. The client could avoid that | |
4269 | * situation by waiting for responses on all the IO requests, | |
4270 | * but better performance may result in retrying IO that | |
4271 | * receives an old_stateid error if requests are rarely | |
4272 | * reordered in flight: | |
0836f587 | 4273 | */ |
81b82965 | 4274 | return nfserr_old_stateid; |
0836f587 BF |
4275 | } |
4276 | ||
7df302f7 | 4277 | static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) |
17456804 | 4278 | { |
97b7e3b6 BF |
4279 | struct nfs4_stid *s; |
4280 | struct nfs4_ol_stateid *ols; | |
1af71cc8 | 4281 | __be32 status = nfserr_bad_stateid; |
17456804 | 4282 | |
7df302f7 | 4283 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
1af71cc8 | 4284 | return status; |
7df302f7 CL |
4285 | /* Client debugging aid. */ |
4286 | if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) { | |
4287 | char addr_str[INET6_ADDRSTRLEN]; | |
4288 | rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str, | |
4289 | sizeof(addr_str)); | |
4290 | pr_warn_ratelimited("NFSD: client %s testing state ID " | |
4291 | "with incorrect client ID\n", addr_str); | |
1af71cc8 | 4292 | return status; |
7df302f7 | 4293 | } |
1af71cc8 JL |
4294 | spin_lock(&cl->cl_lock); |
4295 | s = find_stateid_locked(cl, stateid); | |
97b7e3b6 | 4296 | if (!s) |
1af71cc8 | 4297 | goto out_unlock; |
36279ac1 | 4298 | status = check_stateid_generation(stateid, &s->sc_stateid, 1); |
17456804 | 4299 | if (status) |
1af71cc8 | 4300 | goto out_unlock; |
23340032 BF |
4301 | switch (s->sc_type) { |
4302 | case NFS4_DELEG_STID: | |
1af71cc8 JL |
4303 | status = nfs_ok; |
4304 | break; | |
3bd64a5b | 4305 | case NFS4_REVOKED_DELEG_STID: |
1af71cc8 JL |
4306 | status = nfserr_deleg_revoked; |
4307 | break; | |
23340032 BF |
4308 | case NFS4_OPEN_STID: |
4309 | case NFS4_LOCK_STID: | |
4310 | ols = openlockstateid(s); | |
4311 | if (ols->st_stateowner->so_is_open_owner | |
4312 | && !(openowner(ols->st_stateowner)->oo_flags | |
4313 | & NFS4_OO_CONFIRMED)) | |
1af71cc8 JL |
4314 | status = nfserr_bad_stateid; |
4315 | else | |
4316 | status = nfs_ok; | |
4317 | break; | |
23340032 BF |
4318 | default: |
4319 | printk("unknown stateid type %x\n", s->sc_type); | |
b0fc29d6 | 4320 | /* Fallthrough */ |
23340032 | 4321 | case NFS4_CLOSED_STID: |
b0fc29d6 | 4322 | case NFS4_CLOSED_DELEG_STID: |
1af71cc8 | 4323 | status = nfserr_bad_stateid; |
23340032 | 4324 | } |
1af71cc8 JL |
4325 | out_unlock: |
4326 | spin_unlock(&cl->cl_lock); | |
4327 | return status; | |
17456804 BS |
4328 | } |
4329 | ||
2dd6e458 TM |
4330 | static __be32 |
4331 | nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate, | |
4332 | stateid_t *stateid, unsigned char typemask, | |
4333 | struct nfs4_stid **s, struct nfsd_net *nn) | |
38c2f4b1 | 4334 | { |
0eb6f20a | 4335 | __be32 status; |
38c2f4b1 BF |
4336 | |
4337 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
4338 | return nfserr_bad_stateid; | |
4b24ca7d | 4339 | status = lookup_clientid(&stateid->si_opaque.so_clid, cstate, nn); |
a8a7c677 | 4340 | if (status == nfserr_stale_clientid) { |
4b24ca7d | 4341 | if (cstate->session) |
a8a7c677 | 4342 | return nfserr_bad_stateid; |
38c2f4b1 | 4343 | return nfserr_stale_stateid; |
a8a7c677 | 4344 | } |
0eb6f20a BF |
4345 | if (status) |
4346 | return status; | |
4b24ca7d | 4347 | *s = find_stateid_by_type(cstate->clp, stateid, typemask); |
38c2f4b1 BF |
4348 | if (!*s) |
4349 | return nfserr_bad_stateid; | |
4350 | return nfs_ok; | |
38c2f4b1 BF |
4351 | } |
4352 | ||
1da177e4 LT |
4353 | /* |
4354 | * Checks for stateid operations | |
4355 | */ | |
b37ad28b | 4356 | __be32 |
5ccb0066 | 4357 | nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate, |
dd453dfd | 4358 | stateid_t *stateid, int flags, struct file **filpp) |
1da177e4 | 4359 | { |
69064a27 | 4360 | struct nfs4_stid *s; |
dcef0413 | 4361 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 4362 | struct nfs4_delegation *dp = NULL; |
dd453dfd | 4363 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 4364 | struct inode *ino = current_fh->fh_dentry->d_inode; |
3320fef1 | 4365 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
14bcab1a | 4366 | struct file *file = NULL; |
b37ad28b | 4367 | __be32 status; |
1da177e4 | 4368 | |
1da177e4 LT |
4369 | if (filpp) |
4370 | *filpp = NULL; | |
4371 | ||
5ccb0066 | 4372 | if (grace_disallows_io(net, ino)) |
1da177e4 LT |
4373 | return nfserr_grace; |
4374 | ||
4375 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
5ccb0066 | 4376 | return check_special_stateids(net, current_fh, stateid, flags); |
1da177e4 | 4377 | |
14bcab1a TM |
4378 | nfs4_lock_state(); |
4379 | ||
2dd6e458 | 4380 | status = nfsd4_lookup_stateid(cstate, stateid, |
db24b3b4 | 4381 | NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, |
2dd6e458 | 4382 | &s, nn); |
38c2f4b1 | 4383 | if (status) |
fd911011 | 4384 | goto unlock_state; |
69064a27 BF |
4385 | status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); |
4386 | if (status) | |
4387 | goto out; | |
f7a4d872 BF |
4388 | switch (s->sc_type) { |
4389 | case NFS4_DELEG_STID: | |
69064a27 | 4390 | dp = delegstateid(s); |
dc9bf700 BF |
4391 | status = nfs4_check_delegmode(dp, flags); |
4392 | if (status) | |
4393 | goto out; | |
43b0178e | 4394 | if (filpp) { |
11b9164a | 4395 | file = dp->dl_stid.sc_file->fi_deleg_file; |
14bcab1a | 4396 | if (!file) { |
063b0fb9 BF |
4397 | WARN_ON_ONCE(1); |
4398 | status = nfserr_serverfault; | |
4399 | goto out; | |
4400 | } | |
de18643d | 4401 | get_file(file); |
43b0178e | 4402 | } |
f7a4d872 BF |
4403 | break; |
4404 | case NFS4_OPEN_STID: | |
4405 | case NFS4_LOCK_STID: | |
69064a27 | 4406 | stp = openlockstateid(s); |
f7a4d872 BF |
4407 | status = nfs4_check_fh(current_fh, stp); |
4408 | if (status) | |
1da177e4 | 4409 | goto out; |
fe0750e5 | 4410 | if (stp->st_stateowner->so_is_open_owner |
dad1c067 | 4411 | && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
1da177e4 | 4412 | goto out; |
a4455be0 BF |
4413 | status = nfs4_check_openmode(stp, flags); |
4414 | if (status) | |
1da177e4 | 4415 | goto out; |
f9d7562f | 4416 | if (filpp) { |
11b9164a TM |
4417 | struct nfs4_file *fp = stp->st_stid.sc_file; |
4418 | ||
f9d7562f | 4419 | if (flags & RD_STATE) |
11b9164a | 4420 | file = find_readable_file(fp); |
f9d7562f | 4421 | else |
11b9164a | 4422 | file = find_writeable_file(fp); |
f9d7562f | 4423 | } |
f7a4d872 BF |
4424 | break; |
4425 | default: | |
14bcab1a TM |
4426 | status = nfserr_bad_stateid; |
4427 | goto out; | |
1da177e4 LT |
4428 | } |
4429 | status = nfs_ok; | |
14bcab1a | 4430 | if (file) |
de18643d | 4431 | *filpp = file; |
1da177e4 | 4432 | out: |
fd911011 TM |
4433 | nfs4_put_stid(s); |
4434 | unlock_state: | |
14bcab1a | 4435 | nfs4_unlock_state(); |
1da177e4 LT |
4436 | return status; |
4437 | } | |
4438 | ||
17456804 BS |
4439 | /* |
4440 | * Test if the stateid is valid | |
4441 | */ | |
4442 | __be32 | |
4443 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
4444 | struct nfsd4_test_stateid *test_stateid) | |
4445 | { | |
03cfb420 BS |
4446 | struct nfsd4_test_stateid_id *stateid; |
4447 | struct nfs4_client *cl = cstate->session->se_client; | |
4448 | ||
4449 | nfs4_lock_state(); | |
4450 | list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) | |
7df302f7 CL |
4451 | stateid->ts_id_status = |
4452 | nfsd4_validate_stateid(cl, &stateid->ts_id_stateid); | |
03cfb420 BS |
4453 | nfs4_unlock_state(); |
4454 | ||
17456804 BS |
4455 | return nfs_ok; |
4456 | } | |
4457 | ||
e1ca12df BS |
4458 | __be32 |
4459 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
4460 | struct nfsd4_free_stateid *free_stateid) | |
4461 | { | |
4462 | stateid_t *stateid = &free_stateid->fr_stateid; | |
2da1cec7 | 4463 | struct nfs4_stid *s; |
3bd64a5b | 4464 | struct nfs4_delegation *dp; |
fc5a96c3 | 4465 | struct nfs4_ol_stateid *stp; |
38c2f4b1 | 4466 | struct nfs4_client *cl = cstate->session->se_client; |
2da1cec7 | 4467 | __be32 ret = nfserr_bad_stateid; |
e1ca12df BS |
4468 | |
4469 | nfs4_lock_state(); | |
1af71cc8 JL |
4470 | spin_lock(&cl->cl_lock); |
4471 | s = find_stateid_locked(cl, stateid); | |
2da1cec7 | 4472 | if (!s) |
1af71cc8 | 4473 | goto out_unlock; |
2da1cec7 BF |
4474 | switch (s->sc_type) { |
4475 | case NFS4_DELEG_STID: | |
e1ca12df | 4476 | ret = nfserr_locks_held; |
1af71cc8 | 4477 | break; |
2da1cec7 | 4478 | case NFS4_OPEN_STID: |
2da1cec7 BF |
4479 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); |
4480 | if (ret) | |
1af71cc8 JL |
4481 | break; |
4482 | ret = nfserr_locks_held; | |
f7a4d872 | 4483 | break; |
1af71cc8 JL |
4484 | case NFS4_LOCK_STID: |
4485 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); | |
4486 | if (ret) | |
4487 | break; | |
fc5a96c3 JL |
4488 | stp = openlockstateid(s); |
4489 | ret = nfserr_locks_held; | |
4490 | if (check_for_locks(stp->st_stid.sc_file, | |
4491 | lockowner(stp->st_stateowner))) | |
4492 | break; | |
4493 | unhash_lock_stateid(stp); | |
1af71cc8 | 4494 | spin_unlock(&cl->cl_lock); |
fc5a96c3 JL |
4495 | nfs4_put_stid(s); |
4496 | ret = nfs_ok; | |
1af71cc8 | 4497 | goto out; |
3bd64a5b BF |
4498 | case NFS4_REVOKED_DELEG_STID: |
4499 | dp = delegstateid(s); | |
2d4a532d JL |
4500 | list_del_init(&dp->dl_recall_lru); |
4501 | spin_unlock(&cl->cl_lock); | |
6011695d | 4502 | nfs4_put_stid(s); |
3bd64a5b | 4503 | ret = nfs_ok; |
1af71cc8 JL |
4504 | goto out; |
4505 | /* Default falls through and returns nfserr_bad_stateid */ | |
e1ca12df | 4506 | } |
1af71cc8 JL |
4507 | out_unlock: |
4508 | spin_unlock(&cl->cl_lock); | |
e1ca12df BS |
4509 | out: |
4510 | nfs4_unlock_state(); | |
4511 | return ret; | |
4512 | } | |
4513 | ||
4c4cd222 N |
4514 | static inline int |
4515 | setlkflg (int type) | |
4516 | { | |
4517 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
4518 | RD_STATE : WR_STATE; | |
4519 | } | |
1da177e4 | 4520 | |
dcef0413 | 4521 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
c0a5d93e BF |
4522 | { |
4523 | struct svc_fh *current_fh = &cstate->current_fh; | |
4524 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
4525 | __be32 status; | |
4526 | ||
c0a5d93e BF |
4527 | status = nfsd4_check_seqid(cstate, sop, seqid); |
4528 | if (status) | |
4529 | return status; | |
3bd64a5b BF |
4530 | if (stp->st_stid.sc_type == NFS4_CLOSED_STID |
4531 | || stp->st_stid.sc_type == NFS4_REVOKED_DELEG_STID) | |
f7a4d872 BF |
4532 | /* |
4533 | * "Closed" stateid's exist *only* to return | |
3bd64a5b BF |
4534 | * nfserr_replay_me from the previous step, and |
4535 | * revoked delegations are kept only for free_stateid. | |
f7a4d872 BF |
4536 | */ |
4537 | return nfserr_bad_stateid; | |
4538 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); | |
4539 | if (status) | |
4540 | return status; | |
4541 | return nfs4_check_fh(current_fh, stp); | |
c0a5d93e BF |
4542 | } |
4543 | ||
1da177e4 LT |
4544 | /* |
4545 | * Checks for sequence id mutating operations. | |
4546 | */ | |
b37ad28b | 4547 | static __be32 |
dd453dfd | 4548 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2288d0e3 | 4549 | stateid_t *stateid, char typemask, |
3320fef1 SK |
4550 | struct nfs4_ol_stateid **stpp, |
4551 | struct nfsd_net *nn) | |
1da177e4 | 4552 | { |
0836f587 | 4553 | __be32 status; |
38c2f4b1 | 4554 | struct nfs4_stid *s; |
e17f99b7 | 4555 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 4556 | |
8c10cbdb BH |
4557 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
4558 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 4559 | |
1da177e4 | 4560 | *stpp = NULL; |
2dd6e458 | 4561 | status = nfsd4_lookup_stateid(cstate, stateid, typemask, &s, nn); |
c0a5d93e BF |
4562 | if (status) |
4563 | return status; | |
e17f99b7 | 4564 | stp = openlockstateid(s); |
58fb12e6 | 4565 | nfsd4_cstate_assign_replay(cstate, stp->st_stateowner); |
1da177e4 | 4566 | |
e17f99b7 | 4567 | status = nfs4_seqid_op_checks(cstate, stateid, seqid, stp); |
fd911011 | 4568 | if (!status) |
e17f99b7 | 4569 | *stpp = stp; |
fd911011 TM |
4570 | else |
4571 | nfs4_put_stid(&stp->st_stid); | |
e17f99b7 | 4572 | return status; |
c0a5d93e | 4573 | } |
39325bd0 | 4574 | |
3320fef1 SK |
4575 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
4576 | stateid_t *stateid, struct nfs4_ol_stateid **stpp, struct nfsd_net *nn) | |
c0a5d93e BF |
4577 | { |
4578 | __be32 status; | |
4579 | struct nfs4_openowner *oo; | |
4cbfc9f7 | 4580 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4581 | |
c0a5d93e | 4582 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
4cbfc9f7 | 4583 | NFS4_OPEN_STID, &stp, nn); |
7a8711c9 BF |
4584 | if (status) |
4585 | return status; | |
4cbfc9f7 TM |
4586 | oo = openowner(stp->st_stateowner); |
4587 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { | |
4588 | nfs4_put_stid(&stp->st_stid); | |
3a4f98bb | 4589 | return nfserr_bad_stateid; |
4cbfc9f7 TM |
4590 | } |
4591 | *stpp = stp; | |
3a4f98bb | 4592 | return nfs_ok; |
1da177e4 LT |
4593 | } |
4594 | ||
b37ad28b | 4595 | __be32 |
ca364317 | 4596 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4597 | struct nfsd4_open_confirm *oc) |
1da177e4 | 4598 | { |
b37ad28b | 4599 | __be32 status; |
fe0750e5 | 4600 | struct nfs4_openowner *oo; |
dcef0413 | 4601 | struct nfs4_ol_stateid *stp; |
3320fef1 | 4602 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4603 | |
a6a9f18f AV |
4604 | dprintk("NFSD: nfsd4_open_confirm on file %pd\n", |
4605 | cstate->current_fh.fh_dentry); | |
1da177e4 | 4606 | |
ca364317 | 4607 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
4608 | if (status) |
4609 | return status; | |
1da177e4 LT |
4610 | |
4611 | nfs4_lock_state(); | |
4612 | ||
9072d5c6 | 4613 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 4614 | oc->oc_seqid, &oc->oc_req_stateid, |
3320fef1 | 4615 | NFS4_OPEN_STID, &stp, nn); |
9072d5c6 | 4616 | if (status) |
68b66e82 | 4617 | goto out; |
fe0750e5 | 4618 | oo = openowner(stp->st_stateowner); |
68b66e82 | 4619 | status = nfserr_bad_stateid; |
dad1c067 | 4620 | if (oo->oo_flags & NFS4_OO_CONFIRMED) |
2585fc79 | 4621 | goto put_stateid; |
dad1c067 | 4622 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
dcef0413 BF |
4623 | update_stateid(&stp->st_stid.sc_stateid); |
4624 | memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
8c10cbdb | 4625 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
dcef0413 | 4626 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); |
c7b9a459 | 4627 | |
2a4317c5 | 4628 | nfsd4_client_record_create(oo->oo_owner.so_client); |
68b66e82 | 4629 | status = nfs_ok; |
2585fc79 TM |
4630 | put_stateid: |
4631 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 4632 | out: |
9411b1d4 | 4633 | nfsd4_bump_seqid(cstate, status); |
58fb12e6 | 4634 | nfs4_unlock_state(); |
1da177e4 LT |
4635 | return status; |
4636 | } | |
4637 | ||
6409a5a6 | 4638 | static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) |
1da177e4 | 4639 | { |
82c5ff1b | 4640 | if (!test_access(access, stp)) |
6409a5a6 | 4641 | return; |
11b9164a | 4642 | nfs4_file_put_access(stp->st_stid.sc_file, access); |
82c5ff1b | 4643 | clear_access(access, stp); |
6409a5a6 | 4644 | } |
f197c271 | 4645 | |
6409a5a6 BF |
4646 | static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) |
4647 | { | |
4648 | switch (to_access) { | |
4649 | case NFS4_SHARE_ACCESS_READ: | |
4650 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); | |
4651 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
4652 | break; | |
4653 | case NFS4_SHARE_ACCESS_WRITE: | |
4654 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); | |
4655 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
4656 | break; | |
4657 | case NFS4_SHARE_ACCESS_BOTH: | |
4658 | break; | |
4659 | default: | |
063b0fb9 | 4660 | WARN_ON_ONCE(1); |
1da177e4 LT |
4661 | } |
4662 | } | |
4663 | ||
b37ad28b | 4664 | __be32 |
ca364317 BF |
4665 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
4666 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 4667 | struct nfsd4_open_downgrade *od) |
1da177e4 | 4668 | { |
b37ad28b | 4669 | __be32 status; |
dcef0413 | 4670 | struct nfs4_ol_stateid *stp; |
3320fef1 | 4671 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4672 | |
a6a9f18f AV |
4673 | dprintk("NFSD: nfsd4_open_downgrade on file %pd\n", |
4674 | cstate->current_fh.fh_dentry); | |
1da177e4 | 4675 | |
c30e92df | 4676 | /* We don't yet support WANT bits: */ |
2c8bd7e0 BH |
4677 | if (od->od_deleg_want) |
4678 | dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, | |
4679 | od->od_deleg_want); | |
1da177e4 LT |
4680 | |
4681 | nfs4_lock_state(); | |
c0a5d93e | 4682 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
3320fef1 | 4683 | &od->od_stateid, &stp, nn); |
9072d5c6 | 4684 | if (status) |
1da177e4 | 4685 | goto out; |
1da177e4 | 4686 | status = nfserr_inval; |
82c5ff1b | 4687 | if (!test_access(od->od_share_access, stp)) { |
c11c591f | 4688 | dprintk("NFSD: access not a subset of current bitmap: 0x%hhx, input access=%08x\n", |
1da177e4 | 4689 | stp->st_access_bmap, od->od_share_access); |
0667b1e9 | 4690 | goto put_stateid; |
1da177e4 | 4691 | } |
ce0fc43c | 4692 | if (!test_deny(od->od_share_deny, stp)) { |
c11c591f | 4693 | dprintk("NFSD: deny not a subset of current bitmap: 0x%hhx, input deny=%08x\n", |
1da177e4 | 4694 | stp->st_deny_bmap, od->od_share_deny); |
0667b1e9 | 4695 | goto put_stateid; |
1da177e4 | 4696 | } |
6409a5a6 | 4697 | nfs4_stateid_downgrade(stp, od->od_share_access); |
1da177e4 | 4698 | |
ce0fc43c | 4699 | reset_union_bmap_deny(od->od_share_deny, stp); |
1da177e4 | 4700 | |
dcef0413 BF |
4701 | update_stateid(&stp->st_stid.sc_stateid); |
4702 | memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 4703 | status = nfs_ok; |
0667b1e9 TM |
4704 | put_stateid: |
4705 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 4706 | out: |
9411b1d4 | 4707 | nfsd4_bump_seqid(cstate, status); |
58fb12e6 | 4708 | nfs4_unlock_state(); |
1da177e4 LT |
4709 | return status; |
4710 | } | |
4711 | ||
f7a4d872 BF |
4712 | static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) |
4713 | { | |
acf9295b | 4714 | struct nfs4_client *clp = s->st_stid.sc_client; |
d83017f9 | 4715 | LIST_HEAD(reaplist); |
acf9295b | 4716 | |
f7a4d872 | 4717 | s->st_stid.sc_type = NFS4_CLOSED_STID; |
2c41beb0 | 4718 | spin_lock(&clp->cl_lock); |
d83017f9 | 4719 | unhash_open_stateid(s, &reaplist); |
acf9295b | 4720 | |
d83017f9 JL |
4721 | if (clp->cl_minorversion) { |
4722 | put_ol_stateid_locked(s, &reaplist); | |
4723 | spin_unlock(&clp->cl_lock); | |
4724 | free_ol_stateid_reaplist(&reaplist); | |
4725 | } else { | |
4726 | spin_unlock(&clp->cl_lock); | |
4727 | free_ol_stateid_reaplist(&reaplist); | |
d3134b10 | 4728 | move_to_close_lru(s, clp->net); |
d83017f9 | 4729 | } |
38c387b5 BF |
4730 | } |
4731 | ||
1da177e4 LT |
4732 | /* |
4733 | * nfs4_unlock_state() called after encode | |
4734 | */ | |
b37ad28b | 4735 | __be32 |
ca364317 | 4736 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4737 | struct nfsd4_close *close) |
1da177e4 | 4738 | { |
b37ad28b | 4739 | __be32 status; |
dcef0413 | 4740 | struct nfs4_ol_stateid *stp; |
3320fef1 SK |
4741 | struct net *net = SVC_NET(rqstp); |
4742 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 | 4743 | |
a6a9f18f AV |
4744 | dprintk("NFSD: nfsd4_close on file %pd\n", |
4745 | cstate->current_fh.fh_dentry); | |
1da177e4 LT |
4746 | |
4747 | nfs4_lock_state(); | |
f7a4d872 BF |
4748 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
4749 | &close->cl_stateid, | |
4750 | NFS4_OPEN_STID|NFS4_CLOSED_STID, | |
3320fef1 | 4751 | &stp, nn); |
9411b1d4 | 4752 | nfsd4_bump_seqid(cstate, status); |
9072d5c6 | 4753 | if (status) |
1da177e4 | 4754 | goto out; |
dcef0413 BF |
4755 | update_stateid(&stp->st_stid.sc_stateid); |
4756 | memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 4757 | |
f7a4d872 | 4758 | nfsd4_close_open_stateid(stp); |
8a0b589d TM |
4759 | |
4760 | /* put reference from nfs4_preprocess_seqid_op */ | |
4761 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 4762 | out: |
58fb12e6 | 4763 | nfs4_unlock_state(); |
1da177e4 LT |
4764 | return status; |
4765 | } | |
4766 | ||
b37ad28b | 4767 | __be32 |
ca364317 BF |
4768 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4769 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 4770 | { |
203a8c8e BF |
4771 | struct nfs4_delegation *dp; |
4772 | stateid_t *stateid = &dr->dr_stateid; | |
38c2f4b1 | 4773 | struct nfs4_stid *s; |
b37ad28b | 4774 | __be32 status; |
3320fef1 | 4775 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4776 | |
ca364317 | 4777 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e | 4778 | return status; |
1da177e4 LT |
4779 | |
4780 | nfs4_lock_state(); | |
2dd6e458 | 4781 | status = nfsd4_lookup_stateid(cstate, stateid, NFS4_DELEG_STID, &s, nn); |
38c2f4b1 | 4782 | if (status) |
203a8c8e | 4783 | goto out; |
38c2f4b1 | 4784 | dp = delegstateid(s); |
d5477a8d | 4785 | status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); |
203a8c8e | 4786 | if (status) |
fd911011 | 4787 | goto put_stateid; |
203a8c8e | 4788 | |
3bd64a5b | 4789 | destroy_delegation(dp); |
fd911011 TM |
4790 | put_stateid: |
4791 | nfs4_put_stid(&dp->dl_stid); | |
1da177e4 | 4792 | out: |
203a8c8e BF |
4793 | nfs4_unlock_state(); |
4794 | ||
1da177e4 LT |
4795 | return status; |
4796 | } | |
4797 | ||
4798 | ||
1da177e4 | 4799 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) |
1da177e4 | 4800 | |
87df4de8 BH |
4801 | static inline u64 |
4802 | end_offset(u64 start, u64 len) | |
4803 | { | |
4804 | u64 end; | |
4805 | ||
4806 | end = start + len; | |
4807 | return end >= start ? end: NFS4_MAX_UINT64; | |
4808 | } | |
4809 | ||
4810 | /* last octet in a range */ | |
4811 | static inline u64 | |
4812 | last_byte_offset(u64 start, u64 len) | |
4813 | { | |
4814 | u64 end; | |
4815 | ||
063b0fb9 | 4816 | WARN_ON_ONCE(!len); |
87df4de8 BH |
4817 | end = start + len; |
4818 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
4819 | } | |
4820 | ||
1da177e4 LT |
4821 | /* |
4822 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
4823 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
4824 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
4825 | * locking, this prevents us from being completely protocol-compliant. The | |
4826 | * real solution to this problem is to start using unsigned file offsets in | |
4827 | * the VFS, but this is a very deep change! | |
4828 | */ | |
4829 | static inline void | |
4830 | nfs4_transform_lock_offset(struct file_lock *lock) | |
4831 | { | |
4832 | if (lock->fl_start < 0) | |
4833 | lock->fl_start = OFFSET_MAX; | |
4834 | if (lock->fl_end < 0) | |
4835 | lock->fl_end = OFFSET_MAX; | |
4836 | } | |
4837 | ||
d5b9026a N |
4838 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
4839 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 4840 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 4841 | }; |
1da177e4 LT |
4842 | |
4843 | static inline void | |
4844 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
4845 | { | |
fe0750e5 | 4846 | struct nfs4_lockowner *lo; |
1da177e4 | 4847 | |
d5b9026a | 4848 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 BF |
4849 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
4850 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, | |
4851 | lo->lo_owner.so_owner.len, GFP_KERNEL); | |
7c13f344 BF |
4852 | if (!deny->ld_owner.data) |
4853 | /* We just don't care that much */ | |
4854 | goto nevermind; | |
fe0750e5 BF |
4855 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
4856 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; | |
d5b9026a | 4857 | } else { |
7c13f344 BF |
4858 | nevermind: |
4859 | deny->ld_owner.len = 0; | |
4860 | deny->ld_owner.data = NULL; | |
d5b9026a N |
4861 | deny->ld_clientid.cl_boot = 0; |
4862 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
4863 | } |
4864 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
4865 | deny->ld_length = NFS4_MAX_UINT64; |
4866 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
4867 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
4868 | deny->ld_type = NFS4_READ_LT; | |
4869 | if (fl->fl_type != F_RDLCK) | |
4870 | deny->ld_type = NFS4_WRITE_LT; | |
4871 | } | |
4872 | ||
fe0750e5 | 4873 | static struct nfs4_lockowner * |
c58c6610 | 4874 | find_lockowner_str_locked(clientid_t *clid, struct xdr_netobj *owner, |
d4f0489f | 4875 | struct nfs4_client *clp) |
1da177e4 | 4876 | { |
d4f0489f | 4877 | unsigned int strhashval = ownerstr_hashval(owner); |
b3c32bcd | 4878 | struct nfs4_stateowner *so; |
1da177e4 | 4879 | |
d4f0489f TM |
4880 | list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[strhashval], |
4881 | so_strhash) { | |
b3c32bcd TM |
4882 | if (so->so_is_open_owner) |
4883 | continue; | |
d4f0489f | 4884 | if (!same_owner_str(so, owner)) |
b3c32bcd | 4885 | continue; |
5db1c03f | 4886 | atomic_inc(&so->so_count); |
b3c32bcd | 4887 | return lockowner(so); |
1da177e4 LT |
4888 | } |
4889 | return NULL; | |
4890 | } | |
4891 | ||
c58c6610 TM |
4892 | static struct nfs4_lockowner * |
4893 | find_lockowner_str(clientid_t *clid, struct xdr_netobj *owner, | |
d4f0489f | 4894 | struct nfs4_client *clp) |
c58c6610 TM |
4895 | { |
4896 | struct nfs4_lockowner *lo; | |
4897 | ||
d4f0489f TM |
4898 | spin_lock(&clp->cl_lock); |
4899 | lo = find_lockowner_str_locked(clid, owner, clp); | |
4900 | spin_unlock(&clp->cl_lock); | |
c58c6610 TM |
4901 | return lo; |
4902 | } | |
4903 | ||
8f4b54c5 JL |
4904 | static void nfs4_unhash_lockowner(struct nfs4_stateowner *sop) |
4905 | { | |
c58c6610 | 4906 | unhash_lockowner_locked(lockowner(sop)); |
8f4b54c5 JL |
4907 | } |
4908 | ||
6b180f0b JL |
4909 | static void nfs4_free_lockowner(struct nfs4_stateowner *sop) |
4910 | { | |
4911 | struct nfs4_lockowner *lo = lockowner(sop); | |
4912 | ||
4913 | kmem_cache_free(lockowner_slab, lo); | |
4914 | } | |
4915 | ||
4916 | static const struct nfs4_stateowner_operations lockowner_ops = { | |
8f4b54c5 JL |
4917 | .so_unhash = nfs4_unhash_lockowner, |
4918 | .so_free = nfs4_free_lockowner, | |
6b180f0b JL |
4919 | }; |
4920 | ||
1da177e4 LT |
4921 | /* |
4922 | * Alloc a lock owner structure. | |
4923 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 4924 | * occurred. |
1da177e4 | 4925 | * |
16bfdaaf | 4926 | * strhashval = ownerstr_hashval |
1da177e4 | 4927 | */ |
fe0750e5 | 4928 | static struct nfs4_lockowner * |
c58c6610 TM |
4929 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, |
4930 | struct nfs4_ol_stateid *open_stp, | |
4931 | struct nfsd4_lock *lock) | |
4932 | { | |
c58c6610 | 4933 | struct nfs4_lockowner *lo, *ret; |
1da177e4 | 4934 | |
fe0750e5 BF |
4935 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
4936 | if (!lo) | |
1da177e4 | 4937 | return NULL; |
fe0750e5 BF |
4938 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
4939 | lo->lo_owner.so_is_open_owner = 0; | |
5db1c03f | 4940 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid; |
6b180f0b | 4941 | lo->lo_owner.so_ops = &lockowner_ops; |
d4f0489f | 4942 | spin_lock(&clp->cl_lock); |
c58c6610 | 4943 | ret = find_lockowner_str_locked(&clp->cl_clientid, |
d4f0489f | 4944 | &lock->lk_new_owner, clp); |
c58c6610 TM |
4945 | if (ret == NULL) { |
4946 | list_add(&lo->lo_owner.so_strhash, | |
d4f0489f | 4947 | &clp->cl_ownerstr_hashtbl[strhashval]); |
c58c6610 TM |
4948 | ret = lo; |
4949 | } else | |
4950 | nfs4_free_lockowner(&lo->lo_owner); | |
d4f0489f | 4951 | spin_unlock(&clp->cl_lock); |
fe0750e5 | 4952 | return lo; |
1da177e4 LT |
4953 | } |
4954 | ||
356a95ec JL |
4955 | static void |
4956 | init_lock_stateid(struct nfs4_ol_stateid *stp, struct nfs4_lockowner *lo, | |
4957 | struct nfs4_file *fp, struct inode *inode, | |
4958 | struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 4959 | { |
d3b313a4 | 4960 | struct nfs4_client *clp = lo->lo_owner.so_client; |
1da177e4 | 4961 | |
356a95ec JL |
4962 | lockdep_assert_held(&clp->cl_lock); |
4963 | ||
3d0fabd5 | 4964 | atomic_inc(&stp->st_stid.sc_count); |
3abdb607 | 4965 | stp->st_stid.sc_type = NFS4_LOCK_STID; |
fe0750e5 | 4966 | stp->st_stateowner = &lo->lo_owner; |
e4f1dd7f | 4967 | atomic_inc(&lo->lo_owner.so_count); |
13cd2184 | 4968 | get_nfs4_file(fp); |
11b9164a | 4969 | stp->st_stid.sc_file = fp; |
b49e084d | 4970 | stp->st_stid.sc_free = nfs4_free_lock_stateid; |
0997b173 | 4971 | stp->st_access_bmap = 0; |
1da177e4 | 4972 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 4973 | stp->st_openstp = open_stp; |
3c87b9b7 | 4974 | list_add(&stp->st_locks, &open_stp->st_locks); |
1c755dc1 | 4975 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
1d31a253 TM |
4976 | spin_lock(&fp->fi_lock); |
4977 | list_add(&stp->st_perfile, &fp->fi_stateids); | |
4978 | spin_unlock(&fp->fi_lock); | |
1da177e4 LT |
4979 | } |
4980 | ||
c53530da JL |
4981 | static struct nfs4_ol_stateid * |
4982 | find_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp) | |
4983 | { | |
4984 | struct nfs4_ol_stateid *lst; | |
356a95ec JL |
4985 | struct nfs4_client *clp = lo->lo_owner.so_client; |
4986 | ||
4987 | lockdep_assert_held(&clp->cl_lock); | |
c53530da JL |
4988 | |
4989 | list_for_each_entry(lst, &lo->lo_owner.so_stateids, st_perstateowner) { | |
3d0fabd5 TM |
4990 | if (lst->st_stid.sc_file == fp) { |
4991 | atomic_inc(&lst->st_stid.sc_count); | |
c53530da | 4992 | return lst; |
3d0fabd5 | 4993 | } |
c53530da JL |
4994 | } |
4995 | return NULL; | |
4996 | } | |
4997 | ||
356a95ec JL |
4998 | static struct nfs4_ol_stateid * |
4999 | find_or_create_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fi, | |
5000 | struct inode *inode, struct nfs4_ol_stateid *ost, | |
5001 | bool *new) | |
5002 | { | |
5003 | struct nfs4_stid *ns = NULL; | |
5004 | struct nfs4_ol_stateid *lst; | |
5005 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); | |
5006 | struct nfs4_client *clp = oo->oo_owner.so_client; | |
5007 | ||
5008 | spin_lock(&clp->cl_lock); | |
5009 | lst = find_lock_stateid(lo, fi); | |
5010 | if (lst == NULL) { | |
5011 | spin_unlock(&clp->cl_lock); | |
5012 | ns = nfs4_alloc_stid(clp, stateid_slab); | |
5013 | if (ns == NULL) | |
5014 | return NULL; | |
5015 | ||
5016 | spin_lock(&clp->cl_lock); | |
5017 | lst = find_lock_stateid(lo, fi); | |
5018 | if (likely(!lst)) { | |
5019 | lst = openlockstateid(ns); | |
5020 | init_lock_stateid(lst, lo, fi, inode, ost); | |
5021 | ns = NULL; | |
5022 | *new = true; | |
5023 | } | |
5024 | } | |
5025 | spin_unlock(&clp->cl_lock); | |
5026 | if (ns) | |
5027 | nfs4_put_stid(ns); | |
5028 | return lst; | |
5029 | } | |
c53530da | 5030 | |
fd39ca9a | 5031 | static int |
1da177e4 LT |
5032 | check_lock_length(u64 offset, u64 length) |
5033 | { | |
87df4de8 | 5034 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
5035 | LOFF_OVERFLOW(offset, length))); |
5036 | } | |
5037 | ||
dcef0413 | 5038 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 | 5039 | { |
11b9164a | 5040 | struct nfs4_file *fp = lock_stp->st_stid.sc_file; |
0997b173 | 5041 | |
7214e860 JL |
5042 | lockdep_assert_held(&fp->fi_lock); |
5043 | ||
82c5ff1b | 5044 | if (test_access(access, lock_stp)) |
0997b173 | 5045 | return; |
12659651 | 5046 | __nfs4_file_get_access(fp, access); |
82c5ff1b | 5047 | set_access(access, lock_stp); |
0997b173 BF |
5048 | } |
5049 | ||
356a95ec JL |
5050 | static __be32 |
5051 | lookup_or_create_lock_state(struct nfsd4_compound_state *cstate, | |
5052 | struct nfs4_ol_stateid *ost, | |
5053 | struct nfsd4_lock *lock, | |
5054 | struct nfs4_ol_stateid **lst, bool *new) | |
64a284d0 | 5055 | { |
5db1c03f | 5056 | __be32 status; |
11b9164a | 5057 | struct nfs4_file *fi = ost->st_stid.sc_file; |
64a284d0 BF |
5058 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); |
5059 | struct nfs4_client *cl = oo->oo_owner.so_client; | |
f9c00c3a | 5060 | struct inode *inode = cstate->current_fh.fh_dentry->d_inode; |
64a284d0 BF |
5061 | struct nfs4_lockowner *lo; |
5062 | unsigned int strhashval; | |
5063 | ||
d4f0489f | 5064 | lo = find_lockowner_str(&cl->cl_clientid, &lock->v.new.owner, cl); |
c53530da | 5065 | if (!lo) { |
d4f0489f | 5066 | strhashval = ownerstr_hashval(&lock->v.new.owner); |
c53530da JL |
5067 | lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); |
5068 | if (lo == NULL) | |
5069 | return nfserr_jukebox; | |
5070 | } else { | |
5071 | /* with an existing lockowner, seqids must be the same */ | |
5db1c03f | 5072 | status = nfserr_bad_seqid; |
c53530da JL |
5073 | if (!cstate->minorversion && |
5074 | lock->lk_new_lock_seqid != lo->lo_owner.so_seqid) | |
5db1c03f | 5075 | goto out; |
64a284d0 | 5076 | } |
c53530da | 5077 | |
356a95ec | 5078 | *lst = find_or_create_lock_stateid(lo, fi, inode, ost, new); |
64a284d0 | 5079 | if (*lst == NULL) { |
5db1c03f JL |
5080 | status = nfserr_jukebox; |
5081 | goto out; | |
64a284d0 | 5082 | } |
5db1c03f JL |
5083 | status = nfs_ok; |
5084 | out: | |
5085 | nfs4_put_stateowner(&lo->lo_owner); | |
5086 | return status; | |
64a284d0 BF |
5087 | } |
5088 | ||
1da177e4 LT |
5089 | /* |
5090 | * LOCK operation | |
5091 | */ | |
b37ad28b | 5092 | __be32 |
ca364317 | 5093 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 5094 | struct nfsd4_lock *lock) |
1da177e4 | 5095 | { |
fe0750e5 BF |
5096 | struct nfs4_openowner *open_sop = NULL; |
5097 | struct nfs4_lockowner *lock_sop = NULL; | |
3d0fabd5 | 5098 | struct nfs4_ol_stateid *lock_stp = NULL; |
0667b1e9 | 5099 | struct nfs4_ol_stateid *open_stp = NULL; |
7214e860 | 5100 | struct nfs4_file *fp; |
7d947842 | 5101 | struct file *filp = NULL; |
21179d81 JL |
5102 | struct file_lock *file_lock = NULL; |
5103 | struct file_lock *conflock = NULL; | |
b37ad28b | 5104 | __be32 status = 0; |
b34f27aa | 5105 | int lkflg; |
b8dd7b9a | 5106 | int err; |
5db1c03f | 5107 | bool new = false; |
3320fef1 SK |
5108 | struct net *net = SVC_NET(rqstp); |
5109 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 LT |
5110 | |
5111 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
5112 | (long long) lock->lk_offset, | |
5113 | (long long) lock->lk_length); | |
5114 | ||
1da177e4 LT |
5115 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
5116 | return nfserr_inval; | |
5117 | ||
ca364317 | 5118 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 5119 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
5120 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
5121 | return status; | |
5122 | } | |
5123 | ||
1da177e4 LT |
5124 | nfs4_lock_state(); |
5125 | ||
5126 | if (lock->lk_is_new) { | |
684e5638 BF |
5127 | if (nfsd4_has_session(cstate)) |
5128 | /* See rfc 5661 18.10.3: given clientid is ignored: */ | |
5129 | memcpy(&lock->v.new.clientid, | |
5130 | &cstate->session->se_client->cl_clientid, | |
5131 | sizeof(clientid_t)); | |
5132 | ||
1da177e4 | 5133 | status = nfserr_stale_clientid; |
2c142baa | 5134 | if (STALE_CLIENTID(&lock->lk_new_clientid, nn)) |
1da177e4 | 5135 | goto out; |
1da177e4 | 5136 | |
1da177e4 | 5137 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 5138 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
5139 | lock->lk_new_open_seqid, |
5140 | &lock->lk_new_open_stateid, | |
3320fef1 | 5141 | &open_stp, nn); |
37515177 | 5142 | if (status) |
1da177e4 | 5143 | goto out; |
fe0750e5 | 5144 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 5145 | status = nfserr_bad_stateid; |
684e5638 | 5146 | if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
b34f27aa BF |
5147 | &lock->v.new.clientid)) |
5148 | goto out; | |
64a284d0 | 5149 | status = lookup_or_create_lock_state(cstate, open_stp, lock, |
5db1c03f | 5150 | &lock_stp, &new); |
3d0fabd5 | 5151 | } else { |
dd453dfd | 5152 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
5153 | lock->lk_old_lock_seqid, |
5154 | &lock->lk_old_lock_stateid, | |
3320fef1 | 5155 | NFS4_LOCK_STID, &lock_stp, nn); |
3d0fabd5 | 5156 | } |
e1aaa891 BF |
5157 | if (status) |
5158 | goto out; | |
64a284d0 | 5159 | lock_sop = lockowner(lock_stp->st_stateowner); |
1da177e4 | 5160 | |
b34f27aa BF |
5161 | lkflg = setlkflg(lock->lk_type); |
5162 | status = nfs4_check_openmode(lock_stp, lkflg); | |
5163 | if (status) | |
5164 | goto out; | |
5165 | ||
0dd395dc | 5166 | status = nfserr_grace; |
3320fef1 | 5167 | if (locks_in_grace(net) && !lock->lk_reclaim) |
0dd395dc N |
5168 | goto out; |
5169 | status = nfserr_no_grace; | |
3320fef1 | 5170 | if (!locks_in_grace(net) && lock->lk_reclaim) |
0dd395dc N |
5171 | goto out; |
5172 | ||
21179d81 JL |
5173 | file_lock = locks_alloc_lock(); |
5174 | if (!file_lock) { | |
5175 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
5176 | status = nfserr_jukebox; | |
5177 | goto out; | |
5178 | } | |
5179 | ||
11b9164a | 5180 | fp = lock_stp->st_stid.sc_file; |
21179d81 | 5181 | locks_init_lock(file_lock); |
1da177e4 LT |
5182 | switch (lock->lk_type) { |
5183 | case NFS4_READ_LT: | |
5184 | case NFS4_READW_LT: | |
7214e860 JL |
5185 | spin_lock(&fp->fi_lock); |
5186 | filp = find_readable_file_locked(fp); | |
0997b173 BF |
5187 | if (filp) |
5188 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
7214e860 | 5189 | spin_unlock(&fp->fi_lock); |
21179d81 | 5190 | file_lock->fl_type = F_RDLCK; |
529d7b2a | 5191 | break; |
1da177e4 LT |
5192 | case NFS4_WRITE_LT: |
5193 | case NFS4_WRITEW_LT: | |
7214e860 JL |
5194 | spin_lock(&fp->fi_lock); |
5195 | filp = find_writeable_file_locked(fp); | |
0997b173 BF |
5196 | if (filp) |
5197 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
7214e860 | 5198 | spin_unlock(&fp->fi_lock); |
21179d81 | 5199 | file_lock->fl_type = F_WRLCK; |
529d7b2a | 5200 | break; |
1da177e4 LT |
5201 | default: |
5202 | status = nfserr_inval; | |
5203 | goto out; | |
5204 | } | |
f9d7562f BF |
5205 | if (!filp) { |
5206 | status = nfserr_openmode; | |
5207 | goto out; | |
5208 | } | |
21179d81 JL |
5209 | file_lock->fl_owner = (fl_owner_t)lock_sop; |
5210 | file_lock->fl_pid = current->tgid; | |
5211 | file_lock->fl_file = filp; | |
5212 | file_lock->fl_flags = FL_POSIX; | |
5213 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
5214 | file_lock->fl_start = lock->lk_offset; | |
5215 | file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); | |
5216 | nfs4_transform_lock_offset(file_lock); | |
5217 | ||
5218 | conflock = locks_alloc_lock(); | |
5219 | if (!conflock) { | |
5220 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
5221 | status = nfserr_jukebox; | |
5222 | goto out; | |
5223 | } | |
1da177e4 | 5224 | |
21179d81 | 5225 | err = vfs_lock_file(filp, F_SETLK, file_lock, conflock); |
b8dd7b9a | 5226 | switch (-err) { |
1da177e4 | 5227 | case 0: /* success! */ |
dcef0413 BF |
5228 | update_stateid(&lock_stp->st_stid.sc_stateid); |
5229 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, | |
1da177e4 | 5230 | sizeof(stateid_t)); |
b8dd7b9a | 5231 | status = 0; |
eb76b3fd AA |
5232 | break; |
5233 | case (EAGAIN): /* conflock holds conflicting lock */ | |
5234 | status = nfserr_denied; | |
5235 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
21179d81 | 5236 | nfs4_set_lock_denied(conflock, &lock->lk_denied); |
eb76b3fd | 5237 | break; |
1da177e4 LT |
5238 | case (EDEADLK): |
5239 | status = nfserr_deadlock; | |
eb76b3fd | 5240 | break; |
3e772463 | 5241 | default: |
fd85b817 | 5242 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 5243 | status = nfserrno(err); |
eb76b3fd | 5244 | break; |
1da177e4 | 5245 | } |
1da177e4 | 5246 | out: |
de18643d TM |
5247 | if (filp) |
5248 | fput(filp); | |
5db1c03f JL |
5249 | if (lock_stp) { |
5250 | /* Bump seqid manually if the 4.0 replay owner is openowner */ | |
5251 | if (cstate->replay_owner && | |
5252 | cstate->replay_owner != &lock_sop->lo_owner && | |
5253 | seqid_mutating_err(ntohl(status))) | |
5254 | lock_sop->lo_owner.so_seqid++; | |
5255 | ||
5256 | /* | |
5257 | * If this is a new, never-before-used stateid, and we are | |
5258 | * returning an error, then just go ahead and release it. | |
5259 | */ | |
5260 | if (status && new) | |
5261 | release_lock_stateid(lock_stp); | |
5262 | ||
3d0fabd5 | 5263 | nfs4_put_stid(&lock_stp->st_stid); |
5db1c03f | 5264 | } |
0667b1e9 TM |
5265 | if (open_stp) |
5266 | nfs4_put_stid(&open_stp->st_stid); | |
9411b1d4 | 5267 | nfsd4_bump_seqid(cstate, status); |
58fb12e6 | 5268 | nfs4_unlock_state(); |
21179d81 JL |
5269 | if (file_lock) |
5270 | locks_free_lock(file_lock); | |
5271 | if (conflock) | |
5272 | locks_free_lock(conflock); | |
1da177e4 LT |
5273 | return status; |
5274 | } | |
5275 | ||
55ef1274 BF |
5276 | /* |
5277 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
5278 | * so we do a temporary open here just to get an open file to pass to | |
5279 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
5280 | * inode operation.) | |
5281 | */ | |
04da6e9d | 5282 | static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) |
55ef1274 BF |
5283 | { |
5284 | struct file *file; | |
04da6e9d AV |
5285 | __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); |
5286 | if (!err) { | |
5287 | err = nfserrno(vfs_test_lock(file, lock)); | |
5288 | nfsd_close(file); | |
5289 | } | |
55ef1274 BF |
5290 | return err; |
5291 | } | |
5292 | ||
1da177e4 LT |
5293 | /* |
5294 | * LOCKT operation | |
5295 | */ | |
b37ad28b | 5296 | __be32 |
ca364317 BF |
5297 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
5298 | struct nfsd4_lockt *lockt) | |
1da177e4 | 5299 | { |
21179d81 | 5300 | struct file_lock *file_lock = NULL; |
5db1c03f | 5301 | struct nfs4_lockowner *lo = NULL; |
b37ad28b | 5302 | __be32 status; |
7f2210fa | 5303 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 5304 | |
5ccb0066 | 5305 | if (locks_in_grace(SVC_NET(rqstp))) |
1da177e4 LT |
5306 | return nfserr_grace; |
5307 | ||
5308 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
5309 | return nfserr_inval; | |
5310 | ||
1da177e4 LT |
5311 | nfs4_lock_state(); |
5312 | ||
9b2ef62b | 5313 | if (!nfsd4_has_session(cstate)) { |
4b24ca7d | 5314 | status = lookup_clientid(&lockt->lt_clientid, cstate, nn); |
9b2ef62b BF |
5315 | if (status) |
5316 | goto out; | |
5317 | } | |
1da177e4 | 5318 | |
75c096f7 | 5319 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 5320 | goto out; |
1da177e4 | 5321 | |
21179d81 JL |
5322 | file_lock = locks_alloc_lock(); |
5323 | if (!file_lock) { | |
5324 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
5325 | status = nfserr_jukebox; | |
5326 | goto out; | |
5327 | } | |
5328 | locks_init_lock(file_lock); | |
1da177e4 LT |
5329 | switch (lockt->lt_type) { |
5330 | case NFS4_READ_LT: | |
5331 | case NFS4_READW_LT: | |
21179d81 | 5332 | file_lock->fl_type = F_RDLCK; |
1da177e4 LT |
5333 | break; |
5334 | case NFS4_WRITE_LT: | |
5335 | case NFS4_WRITEW_LT: | |
21179d81 | 5336 | file_lock->fl_type = F_WRLCK; |
1da177e4 LT |
5337 | break; |
5338 | default: | |
2fdada03 | 5339 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
5340 | status = nfserr_inval; |
5341 | goto out; | |
5342 | } | |
5343 | ||
d4f0489f TM |
5344 | lo = find_lockowner_str(&lockt->lt_clientid, &lockt->lt_owner, |
5345 | cstate->clp); | |
fe0750e5 | 5346 | if (lo) |
21179d81 JL |
5347 | file_lock->fl_owner = (fl_owner_t)lo; |
5348 | file_lock->fl_pid = current->tgid; | |
5349 | file_lock->fl_flags = FL_POSIX; | |
1da177e4 | 5350 | |
21179d81 JL |
5351 | file_lock->fl_start = lockt->lt_offset; |
5352 | file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); | |
1da177e4 | 5353 | |
21179d81 | 5354 | nfs4_transform_lock_offset(file_lock); |
1da177e4 | 5355 | |
21179d81 | 5356 | status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock); |
04da6e9d | 5357 | if (status) |
fd85b817 | 5358 | goto out; |
04da6e9d | 5359 | |
21179d81 | 5360 | if (file_lock->fl_type != F_UNLCK) { |
1da177e4 | 5361 | status = nfserr_denied; |
21179d81 | 5362 | nfs4_set_lock_denied(file_lock, &lockt->lt_denied); |
1da177e4 LT |
5363 | } |
5364 | out: | |
5db1c03f JL |
5365 | if (lo) |
5366 | nfs4_put_stateowner(&lo->lo_owner); | |
1da177e4 | 5367 | nfs4_unlock_state(); |
21179d81 JL |
5368 | if (file_lock) |
5369 | locks_free_lock(file_lock); | |
1da177e4 LT |
5370 | return status; |
5371 | } | |
5372 | ||
b37ad28b | 5373 | __be32 |
ca364317 | 5374 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 5375 | struct nfsd4_locku *locku) |
1da177e4 | 5376 | { |
dcef0413 | 5377 | struct nfs4_ol_stateid *stp; |
1da177e4 | 5378 | struct file *filp = NULL; |
21179d81 | 5379 | struct file_lock *file_lock = NULL; |
b37ad28b | 5380 | __be32 status; |
b8dd7b9a | 5381 | int err; |
3320fef1 SK |
5382 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
5383 | ||
1da177e4 LT |
5384 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", |
5385 | (long long) locku->lu_offset, | |
5386 | (long long) locku->lu_length); | |
5387 | ||
5388 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
5389 | return nfserr_inval; | |
5390 | ||
5391 | nfs4_lock_state(); | |
5392 | ||
9072d5c6 | 5393 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
3320fef1 SK |
5394 | &locku->lu_stateid, NFS4_LOCK_STID, |
5395 | &stp, nn); | |
9072d5c6 | 5396 | if (status) |
1da177e4 | 5397 | goto out; |
11b9164a | 5398 | filp = find_any_file(stp->st_stid.sc_file); |
f9d7562f BF |
5399 | if (!filp) { |
5400 | status = nfserr_lock_range; | |
858cc573 | 5401 | goto put_stateid; |
f9d7562f | 5402 | } |
21179d81 JL |
5403 | file_lock = locks_alloc_lock(); |
5404 | if (!file_lock) { | |
5405 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
5406 | status = nfserr_jukebox; | |
de18643d | 5407 | goto fput; |
21179d81 JL |
5408 | } |
5409 | locks_init_lock(file_lock); | |
5410 | file_lock->fl_type = F_UNLCK; | |
0a262ffb | 5411 | file_lock->fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); |
21179d81 JL |
5412 | file_lock->fl_pid = current->tgid; |
5413 | file_lock->fl_file = filp; | |
5414 | file_lock->fl_flags = FL_POSIX; | |
5415 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
5416 | file_lock->fl_start = locku->lu_offset; | |
5417 | ||
5418 | file_lock->fl_end = last_byte_offset(locku->lu_offset, | |
5419 | locku->lu_length); | |
5420 | nfs4_transform_lock_offset(file_lock); | |
1da177e4 | 5421 | |
21179d81 | 5422 | err = vfs_lock_file(filp, F_SETLK, file_lock, NULL); |
b8dd7b9a | 5423 | if (err) { |
fd85b817 | 5424 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
5425 | goto out_nfserr; |
5426 | } | |
dcef0413 BF |
5427 | update_stateid(&stp->st_stid.sc_stateid); |
5428 | memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
de18643d TM |
5429 | fput: |
5430 | fput(filp); | |
858cc573 TM |
5431 | put_stateid: |
5432 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 5433 | out: |
9411b1d4 | 5434 | nfsd4_bump_seqid(cstate, status); |
58fb12e6 | 5435 | nfs4_unlock_state(); |
21179d81 JL |
5436 | if (file_lock) |
5437 | locks_free_lock(file_lock); | |
1da177e4 LT |
5438 | return status; |
5439 | ||
5440 | out_nfserr: | |
b8dd7b9a | 5441 | status = nfserrno(err); |
de18643d | 5442 | goto fput; |
1da177e4 LT |
5443 | } |
5444 | ||
5445 | /* | |
5446 | * returns | |
f9c00c3a JL |
5447 | * true: locks held by lockowner |
5448 | * false: no locks held by lockowner | |
1da177e4 | 5449 | */ |
f9c00c3a JL |
5450 | static bool |
5451 | check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner) | |
1da177e4 LT |
5452 | { |
5453 | struct file_lock **flpp; | |
f9c00c3a JL |
5454 | int status = false; |
5455 | struct file *filp = find_any_file(fp); | |
5456 | struct inode *inode; | |
5457 | ||
5458 | if (!filp) { | |
5459 | /* Any valid lock stateid should have some sort of access */ | |
5460 | WARN_ON_ONCE(1); | |
5461 | return status; | |
5462 | } | |
5463 | ||
5464 | inode = file_inode(filp); | |
1da177e4 | 5465 | |
1c8c601a | 5466 | spin_lock(&inode->i_lock); |
1da177e4 | 5467 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
796dadfd | 5468 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
f9c00c3a JL |
5469 | status = true; |
5470 | break; | |
796dadfd | 5471 | } |
1da177e4 | 5472 | } |
1c8c601a | 5473 | spin_unlock(&inode->i_lock); |
f9c00c3a | 5474 | fput(filp); |
1da177e4 LT |
5475 | return status; |
5476 | } | |
5477 | ||
b37ad28b | 5478 | __be32 |
b591480b BF |
5479 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
5480 | struct nfsd4_compound_state *cstate, | |
5481 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
5482 | { |
5483 | clientid_t *clid = &rlockowner->rl_clientid; | |
882e9d25 JL |
5484 | struct nfs4_stateowner *sop; |
5485 | struct nfs4_lockowner *lo = NULL; | |
dcef0413 | 5486 | struct nfs4_ol_stateid *stp; |
1da177e4 | 5487 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
d4f0489f | 5488 | unsigned int hashval = ownerstr_hashval(owner); |
b37ad28b | 5489 | __be32 status; |
7f2210fa | 5490 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
c58c6610 | 5491 | struct nfs4_client *clp; |
1da177e4 LT |
5492 | |
5493 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
5494 | clid->cl_boot, clid->cl_id); | |
5495 | ||
1da177e4 LT |
5496 | nfs4_lock_state(); |
5497 | ||
4b24ca7d | 5498 | status = lookup_clientid(clid, cstate, nn); |
9b2ef62b BF |
5499 | if (status) |
5500 | goto out; | |
5501 | ||
d4f0489f | 5502 | clp = cstate->clp; |
fd44907c | 5503 | /* Find the matching lock stateowner */ |
d4f0489f | 5504 | spin_lock(&clp->cl_lock); |
882e9d25 | 5505 | list_for_each_entry(sop, &clp->cl_ownerstr_hashtbl[hashval], |
d4f0489f | 5506 | so_strhash) { |
fd44907c | 5507 | |
882e9d25 JL |
5508 | if (sop->so_is_open_owner || !same_owner_str(sop, owner)) |
5509 | continue; | |
fd44907c | 5510 | |
882e9d25 JL |
5511 | /* see if there are still any locks associated with it */ |
5512 | lo = lockowner(sop); | |
5513 | list_for_each_entry(stp, &sop->so_stateids, st_perstateowner) { | |
5514 | if (check_for_locks(stp->st_stid.sc_file, lo)) { | |
5515 | status = nfserr_locks_held; | |
5516 | spin_unlock(&clp->cl_lock); | |
5517 | goto out; | |
5518 | } | |
5adfd885 | 5519 | } |
882e9d25 JL |
5520 | |
5521 | atomic_inc(&sop->so_count); | |
5522 | break; | |
1da177e4 | 5523 | } |
c58c6610 | 5524 | spin_unlock(&clp->cl_lock); |
882e9d25 JL |
5525 | if (lo) |
5526 | release_lockowner(lo); | |
1da177e4 LT |
5527 | out: |
5528 | nfs4_unlock_state(); | |
5529 | return status; | |
5530 | } | |
5531 | ||
5532 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 5533 | alloc_reclaim(void) |
1da177e4 | 5534 | { |
a55370a3 | 5535 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
5536 | } |
5537 | ||
0ce0c2b5 | 5538 | bool |
52e19c09 | 5539 | nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn) |
c7b9a459 | 5540 | { |
0ce0c2b5 | 5541 | struct nfs4_client_reclaim *crp; |
c7b9a459 | 5542 | |
52e19c09 | 5543 | crp = nfsd4_find_reclaim_client(name, nn); |
0ce0c2b5 | 5544 | return (crp && crp->cr_clp); |
c7b9a459 N |
5545 | } |
5546 | ||
1da177e4 LT |
5547 | /* |
5548 | * failure => all reset bets are off, nfserr_no_grace... | |
5549 | */ | |
772a9bbb | 5550 | struct nfs4_client_reclaim * |
52e19c09 | 5551 | nfs4_client_to_reclaim(const char *name, struct nfsd_net *nn) |
1da177e4 LT |
5552 | { |
5553 | unsigned int strhashval; | |
772a9bbb | 5554 | struct nfs4_client_reclaim *crp; |
1da177e4 | 5555 | |
a55370a3 N |
5556 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
5557 | crp = alloc_reclaim(); | |
772a9bbb JL |
5558 | if (crp) { |
5559 | strhashval = clientstr_hashval(name); | |
5560 | INIT_LIST_HEAD(&crp->cr_strhash); | |
52e19c09 | 5561 | list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]); |
772a9bbb | 5562 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
0ce0c2b5 | 5563 | crp->cr_clp = NULL; |
52e19c09 | 5564 | nn->reclaim_str_hashtbl_size++; |
772a9bbb JL |
5565 | } |
5566 | return crp; | |
1da177e4 LT |
5567 | } |
5568 | ||
ce30e539 | 5569 | void |
52e19c09 | 5570 | nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn) |
ce30e539 JL |
5571 | { |
5572 | list_del(&crp->cr_strhash); | |
5573 | kfree(crp); | |
52e19c09 | 5574 | nn->reclaim_str_hashtbl_size--; |
ce30e539 JL |
5575 | } |
5576 | ||
2a4317c5 | 5577 | void |
52e19c09 | 5578 | nfs4_release_reclaim(struct nfsd_net *nn) |
1da177e4 LT |
5579 | { |
5580 | struct nfs4_client_reclaim *crp = NULL; | |
5581 | int i; | |
5582 | ||
1da177e4 | 5583 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
52e19c09 SK |
5584 | while (!list_empty(&nn->reclaim_str_hashtbl[i])) { |
5585 | crp = list_entry(nn->reclaim_str_hashtbl[i].next, | |
1da177e4 | 5586 | struct nfs4_client_reclaim, cr_strhash); |
52e19c09 | 5587 | nfs4_remove_reclaim_record(crp, nn); |
1da177e4 LT |
5588 | } |
5589 | } | |
063b0fb9 | 5590 | WARN_ON_ONCE(nn->reclaim_str_hashtbl_size); |
1da177e4 LT |
5591 | } |
5592 | ||
5593 | /* | |
5594 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
2a4317c5 | 5595 | struct nfs4_client_reclaim * |
52e19c09 | 5596 | nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn) |
1da177e4 LT |
5597 | { |
5598 | unsigned int strhashval; | |
1da177e4 LT |
5599 | struct nfs4_client_reclaim *crp = NULL; |
5600 | ||
278c931c | 5601 | dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir); |
1da177e4 | 5602 | |
278c931c | 5603 | strhashval = clientstr_hashval(recdir); |
52e19c09 | 5604 | list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) { |
278c931c | 5605 | if (same_name(crp->cr_recdir, recdir)) { |
1da177e4 LT |
5606 | return crp; |
5607 | } | |
5608 | } | |
5609 | return NULL; | |
5610 | } | |
5611 | ||
5612 | /* | |
5613 | * Called from OPEN. Look for clientid in reclaim list. | |
5614 | */ | |
b37ad28b | 5615 | __be32 |
0fe492db TM |
5616 | nfs4_check_open_reclaim(clientid_t *clid, |
5617 | struct nfsd4_compound_state *cstate, | |
5618 | struct nfsd_net *nn) | |
1da177e4 | 5619 | { |
0fe492db | 5620 | __be32 status; |
a52d726b JL |
5621 | |
5622 | /* find clientid in conf_id_hashtbl */ | |
0fe492db TM |
5623 | status = lookup_clientid(clid, cstate, nn); |
5624 | if (status) | |
a52d726b JL |
5625 | return nfserr_reclaim_bad; |
5626 | ||
0fe492db TM |
5627 | if (nfsd4_client_record_check(cstate->clp)) |
5628 | return nfserr_reclaim_bad; | |
5629 | ||
5630 | return nfs_ok; | |
1da177e4 LT |
5631 | } |
5632 | ||
65178db4 BS |
5633 | #ifdef CONFIG_NFSD_FAULT_INJECTION |
5634 | ||
44e34da6 BS |
5635 | u64 nfsd_forget_client(struct nfs4_client *clp, u64 max) |
5636 | { | |
221a6876 BF |
5637 | if (mark_client_expired(clp)) |
5638 | return 0; | |
44e34da6 BS |
5639 | expire_client(clp); |
5640 | return 1; | |
5641 | } | |
5642 | ||
184c1847 BS |
5643 | u64 nfsd_print_client(struct nfs4_client *clp, u64 num) |
5644 | { | |
5645 | char buf[INET6_ADDRSTRLEN]; | |
0a5c33e2 | 5646 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
184c1847 BS |
5647 | printk(KERN_INFO "NFS Client: %s\n", buf); |
5648 | return 1; | |
5649 | } | |
5650 | ||
5651 | static void nfsd_print_count(struct nfs4_client *clp, unsigned int count, | |
5652 | const char *type) | |
5653 | { | |
5654 | char buf[INET6_ADDRSTRLEN]; | |
0a5c33e2 | 5655 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
184c1847 BS |
5656 | printk(KERN_INFO "NFS Client: %s has %u %s\n", buf, count, type); |
5657 | } | |
5658 | ||
3c87b9b7 TM |
5659 | static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max, |
5660 | void (*func)(struct nfs4_ol_stateid *)) | |
fc29171f BS |
5661 | { |
5662 | struct nfs4_openowner *oop; | |
fc29171f | 5663 | struct nfs4_ol_stateid *stp, *st_next; |
3c87b9b7 | 5664 | struct nfs4_ol_stateid *lst, *lst_next; |
fc29171f BS |
5665 | u64 count = 0; |
5666 | ||
5667 | list_for_each_entry(oop, &clp->cl_openowners, oo_perclient) { | |
3c87b9b7 TM |
5668 | list_for_each_entry_safe(stp, st_next, |
5669 | &oop->oo_owner.so_stateids, st_perstateowner) { | |
5670 | list_for_each_entry_safe(lst, lst_next, | |
5671 | &stp->st_locks, st_locks) { | |
fc29171f | 5672 | if (func) |
3c87b9b7 | 5673 | func(lst); |
fc29171f BS |
5674 | if (++count == max) |
5675 | return count; | |
5676 | } | |
5677 | } | |
5678 | } | |
5679 | ||
5680 | return count; | |
5681 | } | |
5682 | ||
5683 | u64 nfsd_forget_client_locks(struct nfs4_client *clp, u64 max) | |
5684 | { | |
3c87b9b7 | 5685 | return nfsd_foreach_client_lock(clp, max, release_lock_stateid); |
fc29171f BS |
5686 | } |
5687 | ||
184c1847 BS |
5688 | u64 nfsd_print_client_locks(struct nfs4_client *clp, u64 max) |
5689 | { | |
5690 | u64 count = nfsd_foreach_client_lock(clp, max, NULL); | |
5691 | nfsd_print_count(clp, count, "locked files"); | |
5692 | return count; | |
5693 | } | |
5694 | ||
4dbdbda8 BS |
5695 | static u64 nfsd_foreach_client_open(struct nfs4_client *clp, u64 max, void (*func)(struct nfs4_openowner *)) |
5696 | { | |
5697 | struct nfs4_openowner *oop, *next; | |
5698 | u64 count = 0; | |
5699 | ||
5700 | list_for_each_entry_safe(oop, next, &clp->cl_openowners, oo_perclient) { | |
5701 | if (func) | |
5702 | func(oop); | |
5703 | if (++count == max) | |
5704 | break; | |
5705 | } | |
5706 | ||
5707 | return count; | |
5708 | } | |
5709 | ||
5710 | u64 nfsd_forget_client_openowners(struct nfs4_client *clp, u64 max) | |
5711 | { | |
5712 | return nfsd_foreach_client_open(clp, max, release_openowner); | |
5713 | } | |
5714 | ||
184c1847 BS |
5715 | u64 nfsd_print_client_openowners(struct nfs4_client *clp, u64 max) |
5716 | { | |
5717 | u64 count = nfsd_foreach_client_open(clp, max, NULL); | |
5718 | nfsd_print_count(clp, count, "open files"); | |
5719 | return count; | |
5720 | } | |
5721 | ||
269de30f BS |
5722 | static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max, |
5723 | struct list_head *victims) | |
5724 | { | |
5725 | struct nfs4_delegation *dp, *next; | |
5726 | u64 count = 0; | |
5727 | ||
cdc97505 | 5728 | lockdep_assert_held(&state_lock); |
269de30f | 5729 | list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) { |
dff1399f JL |
5730 | if (victims) { |
5731 | /* | |
5732 | * It's not safe to mess with delegations that have a | |
5733 | * non-zero dl_time. They might have already been broken | |
5734 | * and could be processed by the laundromat outside of | |
5735 | * the state_lock. Just leave them be. | |
5736 | */ | |
5737 | if (dp->dl_time != 0) | |
5738 | continue; | |
5739 | ||
42690676 JL |
5740 | unhash_delegation_locked(dp); |
5741 | list_add(&dp->dl_recall_lru, victims); | |
dff1399f | 5742 | } |
269de30f BS |
5743 | if (++count == max) |
5744 | break; | |
5745 | } | |
5746 | return count; | |
5747 | } | |
5748 | ||
5749 | u64 nfsd_forget_client_delegations(struct nfs4_client *clp, u64 max) | |
5750 | { | |
5751 | struct nfs4_delegation *dp, *next; | |
5752 | LIST_HEAD(victims); | |
5753 | u64 count; | |
5754 | ||
cdc97505 | 5755 | spin_lock(&state_lock); |
269de30f | 5756 | count = nfsd_find_all_delegations(clp, max, &victims); |
cdc97505 | 5757 | spin_unlock(&state_lock); |
269de30f | 5758 | |
2d4a532d JL |
5759 | list_for_each_entry_safe(dp, next, &victims, dl_recall_lru) { |
5760 | list_del_init(&dp->dl_recall_lru); | |
3bd64a5b | 5761 | revoke_delegation(dp); |
2d4a532d | 5762 | } |
269de30f BS |
5763 | |
5764 | return count; | |
5765 | } | |
5766 | ||
5767 | u64 nfsd_recall_client_delegations(struct nfs4_client *clp, u64 max) | |
5768 | { | |
dff1399f | 5769 | struct nfs4_delegation *dp; |
269de30f BS |
5770 | LIST_HEAD(victims); |
5771 | u64 count; | |
5772 | ||
cdc97505 | 5773 | spin_lock(&state_lock); |
269de30f | 5774 | count = nfsd_find_all_delegations(clp, max, &victims); |
dff1399f JL |
5775 | while (!list_empty(&victims)) { |
5776 | dp = list_first_entry(&victims, struct nfs4_delegation, | |
5777 | dl_recall_lru); | |
5778 | list_del_init(&dp->dl_recall_lru); | |
5779 | dp->dl_time = 0; | |
269de30f | 5780 | nfsd_break_one_deleg(dp); |
dff1399f | 5781 | } |
cdc97505 | 5782 | spin_unlock(&state_lock); |
269de30f BS |
5783 | |
5784 | return count; | |
5785 | } | |
5786 | ||
184c1847 BS |
5787 | u64 nfsd_print_client_delegations(struct nfs4_client *clp, u64 max) |
5788 | { | |
5789 | u64 count = 0; | |
5790 | ||
cdc97505 | 5791 | spin_lock(&state_lock); |
184c1847 | 5792 | count = nfsd_find_all_delegations(clp, max, NULL); |
cdc97505 | 5793 | spin_unlock(&state_lock); |
184c1847 BS |
5794 | |
5795 | nfsd_print_count(clp, count, "delegations"); | |
5796 | return count; | |
5797 | } | |
5798 | ||
44e34da6 | 5799 | u64 nfsd_for_n_state(u64 max, u64 (*func)(struct nfs4_client *, u64)) |
65178db4 BS |
5800 | { |
5801 | struct nfs4_client *clp, *next; | |
44e34da6 | 5802 | u64 count = 0; |
3320fef1 | 5803 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id); |
65178db4 | 5804 | |
44e34da6 BS |
5805 | if (!nfsd_netns_ready(nn)) |
5806 | return 0; | |
5807 | ||
5ed58bb2 | 5808 | list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { |
44e34da6 BS |
5809 | count += func(clp, max - count); |
5810 | if ((max != 0) && (count >= max)) | |
65178db4 BS |
5811 | break; |
5812 | } | |
65178db4 | 5813 | |
44e34da6 BS |
5814 | return count; |
5815 | } | |
5816 | ||
6c1e82a4 BS |
5817 | struct nfs4_client *nfsd_find_client(struct sockaddr_storage *addr, size_t addr_size) |
5818 | { | |
5819 | struct nfs4_client *clp; | |
5820 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id); | |
5821 | ||
5822 | if (!nfsd_netns_ready(nn)) | |
5823 | return NULL; | |
5824 | ||
5825 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
5826 | if (memcmp(&clp->cl_addr, addr, addr_size) == 0) | |
5827 | return clp; | |
5828 | } | |
5829 | return NULL; | |
5830 | } | |
5831 | ||
65178db4 BS |
5832 | #endif /* CONFIG_NFSD_FAULT_INJECTION */ |
5833 | ||
c2f1a551 MS |
5834 | /* |
5835 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
5836 | * client may quite reasonably hang on to a delegation as long as it has | |
5837 | * the inode cached. This becomes an obvious problem the first time a | |
5838 | * client's inode cache approaches the size of the server's total memory. | |
5839 | * | |
5840 | * For now we avoid this problem by imposing a hard limit on the number | |
5841 | * of delegations, which varies according to the server's memory size. | |
5842 | */ | |
5843 | static void | |
5844 | set_max_delegations(void) | |
5845 | { | |
5846 | /* | |
5847 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
5848 | * estimates suggest that in the worst case (where every delegation | |
5849 | * is for a different inode), a delegation could take about 1.5K, | |
5850 | * giving a worst case usage of about 6% of memory. | |
5851 | */ | |
5852 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
5853 | } | |
5854 | ||
d85ed443 | 5855 | static int nfs4_state_create_net(struct net *net) |
8daae4dc SK |
5856 | { |
5857 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
5858 | int i; | |
5859 | ||
5860 | nn->conf_id_hashtbl = kmalloc(sizeof(struct list_head) * | |
5861 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
5862 | if (!nn->conf_id_hashtbl) | |
382a62e7 | 5863 | goto err; |
0a7ec377 SK |
5864 | nn->unconf_id_hashtbl = kmalloc(sizeof(struct list_head) * |
5865 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
5866 | if (!nn->unconf_id_hashtbl) | |
5867 | goto err_unconf_id; | |
1872de0e SK |
5868 | nn->sessionid_hashtbl = kmalloc(sizeof(struct list_head) * |
5869 | SESSION_HASH_SIZE, GFP_KERNEL); | |
5870 | if (!nn->sessionid_hashtbl) | |
5871 | goto err_sessionid; | |
8daae4dc | 5872 | |
382a62e7 | 5873 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
8daae4dc | 5874 | INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]); |
0a7ec377 | 5875 | INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]); |
382a62e7 | 5876 | } |
1872de0e SK |
5877 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
5878 | INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]); | |
382a62e7 | 5879 | nn->conf_name_tree = RB_ROOT; |
a99454aa | 5880 | nn->unconf_name_tree = RB_ROOT; |
5ed58bb2 | 5881 | INIT_LIST_HEAD(&nn->client_lru); |
73758fed | 5882 | INIT_LIST_HEAD(&nn->close_lru); |
e8c69d17 | 5883 | INIT_LIST_HEAD(&nn->del_recall_lru); |
c9a49628 | 5884 | spin_lock_init(&nn->client_lock); |
8daae4dc | 5885 | |
09121281 | 5886 | INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main); |
d85ed443 | 5887 | get_net(net); |
09121281 | 5888 | |
8daae4dc | 5889 | return 0; |
382a62e7 | 5890 | |
1872de0e | 5891 | err_sessionid: |
9b531137 | 5892 | kfree(nn->unconf_id_hashtbl); |
0a7ec377 SK |
5893 | err_unconf_id: |
5894 | kfree(nn->conf_id_hashtbl); | |
382a62e7 SK |
5895 | err: |
5896 | return -ENOMEM; | |
8daae4dc SK |
5897 | } |
5898 | ||
5899 | static void | |
4dce0ac9 | 5900 | nfs4_state_destroy_net(struct net *net) |
8daae4dc SK |
5901 | { |
5902 | int i; | |
5903 | struct nfs4_client *clp = NULL; | |
5904 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
5905 | ||
5906 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { | |
5907 | while (!list_empty(&nn->conf_id_hashtbl[i])) { | |
5908 | clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
5909 | destroy_client(clp); | |
5910 | } | |
5911 | } | |
a99454aa | 5912 | |
2b905635 KM |
5913 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
5914 | while (!list_empty(&nn->unconf_id_hashtbl[i])) { | |
5915 | clp = list_entry(nn->unconf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
5916 | destroy_client(clp); | |
5917 | } | |
a99454aa SK |
5918 | } |
5919 | ||
1872de0e | 5920 | kfree(nn->sessionid_hashtbl); |
0a7ec377 | 5921 | kfree(nn->unconf_id_hashtbl); |
8daae4dc | 5922 | kfree(nn->conf_id_hashtbl); |
4dce0ac9 | 5923 | put_net(net); |
8daae4dc SK |
5924 | } |
5925 | ||
f252bc68 | 5926 | int |
d85ed443 | 5927 | nfs4_state_start_net(struct net *net) |
ac4d8ff2 | 5928 | { |
5e1533c7 | 5929 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b5a1a81e BF |
5930 | int ret; |
5931 | ||
d85ed443 | 5932 | ret = nfs4_state_create_net(net); |
8daae4dc SK |
5933 | if (ret) |
5934 | return ret; | |
5e1533c7 | 5935 | nfsd4_client_tracking_init(net); |
2c142baa | 5936 | nn->boot_time = get_seconds(); |
5ccb0066 | 5937 | locks_start_grace(net, &nn->nfsd4_manager); |
a51c84ed | 5938 | nn->grace_ended = false; |
d85ed443 | 5939 | printk(KERN_INFO "NFSD: starting %ld-second grace period (net %p)\n", |
5284b44e SK |
5940 | nn->nfsd4_grace, net); |
5941 | queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ); | |
d85ed443 SK |
5942 | return 0; |
5943 | } | |
5944 | ||
5945 | /* initialization to perform when the nfsd service is started: */ | |
5946 | ||
5947 | int | |
5948 | nfs4_state_start(void) | |
5949 | { | |
5950 | int ret; | |
5951 | ||
b5a1a81e | 5952 | ret = set_callback_cred(); |
d85ed443 SK |
5953 | if (ret) |
5954 | return -ENOMEM; | |
58da282b | 5955 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
a6d6b781 JL |
5956 | if (laundry_wq == NULL) { |
5957 | ret = -ENOMEM; | |
5958 | goto out_recovery; | |
5959 | } | |
b5a1a81e BF |
5960 | ret = nfsd4_create_callback_queue(); |
5961 | if (ret) | |
5962 | goto out_free_laundry; | |
09121281 | 5963 | |
c2f1a551 | 5964 | set_max_delegations(); |
d85ed443 | 5965 | |
b5a1a81e | 5966 | return 0; |
d85ed443 | 5967 | |
b5a1a81e BF |
5968 | out_free_laundry: |
5969 | destroy_workqueue(laundry_wq); | |
a6d6b781 | 5970 | out_recovery: |
b5a1a81e | 5971 | return ret; |
1da177e4 LT |
5972 | } |
5973 | ||
f252bc68 | 5974 | void |
4dce0ac9 | 5975 | nfs4_state_shutdown_net(struct net *net) |
1da177e4 | 5976 | { |
1da177e4 | 5977 | struct nfs4_delegation *dp = NULL; |
1da177e4 | 5978 | struct list_head *pos, *next, reaplist; |
4dce0ac9 | 5979 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
1da177e4 | 5980 | |
4dce0ac9 SK |
5981 | cancel_delayed_work_sync(&nn->laundromat_work); |
5982 | locks_end_grace(&nn->nfsd4_manager); | |
ac55fdc4 | 5983 | |
e50a26dc | 5984 | nfs4_lock_state(); |
1da177e4 | 5985 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 5986 | spin_lock(&state_lock); |
e8c69d17 | 5987 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 | 5988 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
42690676 JL |
5989 | unhash_delegation_locked(dp); |
5990 | list_add(&dp->dl_recall_lru, &reaplist); | |
1da177e4 | 5991 | } |
cdc97505 | 5992 | spin_unlock(&state_lock); |
1da177e4 LT |
5993 | list_for_each_safe(pos, next, &reaplist) { |
5994 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
42690676 | 5995 | list_del_init(&dp->dl_recall_lru); |
6011695d | 5996 | nfs4_put_stid(&dp->dl_stid); |
1da177e4 LT |
5997 | } |
5998 | ||
3320fef1 | 5999 | nfsd4_client_tracking_exit(net); |
4dce0ac9 | 6000 | nfs4_state_destroy_net(net); |
e50a26dc | 6001 | nfs4_unlock_state(); |
1da177e4 LT |
6002 | } |
6003 | ||
6004 | void | |
6005 | nfs4_state_shutdown(void) | |
6006 | { | |
5e8d5c29 | 6007 | destroy_workqueue(laundry_wq); |
c3935e30 | 6008 | nfsd4_destroy_callback_queue(); |
1da177e4 | 6009 | } |
8b70484c TM |
6010 | |
6011 | static void | |
6012 | get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
6013 | { | |
37c593c5 TM |
6014 | if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) |
6015 | memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); | |
8b70484c TM |
6016 | } |
6017 | ||
6018 | static void | |
6019 | put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
6020 | { | |
37c593c5 TM |
6021 | if (cstate->minorversion) { |
6022 | memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); | |
6023 | SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
6024 | } | |
6025 | } | |
6026 | ||
6027 | void | |
6028 | clear_current_stateid(struct nfsd4_compound_state *cstate) | |
6029 | { | |
6030 | CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
8b70484c TM |
6031 | } |
6032 | ||
62cd4a59 TM |
6033 | /* |
6034 | * functions to set current state id | |
6035 | */ | |
9428fe1a TM |
6036 | void |
6037 | nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
6038 | { | |
6039 | put_stateid(cstate, &odp->od_stateid); | |
6040 | } | |
6041 | ||
8b70484c TM |
6042 | void |
6043 | nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) | |
6044 | { | |
6045 | put_stateid(cstate, &open->op_stateid); | |
6046 | } | |
6047 | ||
62cd4a59 TM |
6048 | void |
6049 | nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
6050 | { | |
6051 | put_stateid(cstate, &close->cl_stateid); | |
6052 | } | |
6053 | ||
6054 | void | |
6055 | nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) | |
6056 | { | |
6057 | put_stateid(cstate, &lock->lk_resp_stateid); | |
6058 | } | |
6059 | ||
6060 | /* | |
6061 | * functions to consume current state id | |
6062 | */ | |
1e97b519 | 6063 | |
9428fe1a TM |
6064 | void |
6065 | nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
6066 | { | |
6067 | get_stateid(cstate, &odp->od_stateid); | |
6068 | } | |
6069 | ||
6070 | void | |
6071 | nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) | |
6072 | { | |
6073 | get_stateid(cstate, &drp->dr_stateid); | |
6074 | } | |
6075 | ||
1e97b519 TM |
6076 | void |
6077 | nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) | |
6078 | { | |
6079 | get_stateid(cstate, &fsp->fr_stateid); | |
6080 | } | |
6081 | ||
6082 | void | |
6083 | nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) | |
6084 | { | |
6085 | get_stateid(cstate, &setattr->sa_stateid); | |
6086 | } | |
6087 | ||
8b70484c TM |
6088 | void |
6089 | nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
6090 | { | |
6091 | get_stateid(cstate, &close->cl_stateid); | |
6092 | } | |
6093 | ||
6094 | void | |
62cd4a59 | 6095 | nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) |
8b70484c | 6096 | { |
62cd4a59 | 6097 | get_stateid(cstate, &locku->lu_stateid); |
8b70484c | 6098 | } |
30813e27 TM |
6099 | |
6100 | void | |
6101 | nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) | |
6102 | { | |
6103 | get_stateid(cstate, &read->rd_stateid); | |
6104 | } | |
6105 | ||
6106 | void | |
6107 | nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) | |
6108 | { | |
6109 | get_stateid(cstate, &write->wr_stateid); | |
6110 | } |