]>
Commit | Line | Data |
---|---|---|
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 | ||
6136d2b4 | 35 | #include <linux/idr.h> |
aceaf78d | 36 | #include <linux/file.h> |
b89f4321 | 37 | #include <linux/fs.h> |
5a0e3ad6 | 38 | #include <linux/slab.h> |
0964a3d3 | 39 | #include <linux/namei.h> |
c2f1a551 | 40 | #include <linux/swap.h> |
17456804 | 41 | #include <linux/pagemap.h> |
68e76ad0 | 42 | #include <linux/sunrpc/svcauth_gss.h> |
363168b4 | 43 | #include <linux/sunrpc/clnt.h> |
9a74af21 | 44 | #include "xdr4.h" |
0a3adade | 45 | #include "vfs.h" |
1da177e4 LT |
46 | |
47 | #define NFSDDBG_FACILITY NFSDDBG_PROC | |
48 | ||
49 | /* Globals */ | |
cf07d2ea | 50 | time_t nfsd4_lease = 90; /* default lease time */ |
efc4bb4f | 51 | time_t nfsd4_grace = 90; |
fd39ca9a | 52 | static time_t boot_time; |
fd39ca9a N |
53 | static stateid_t zerostateid; /* bits all 0 */ |
54 | static stateid_t onestateid; /* bits all 1 */ | |
ec6b5d7b | 55 | static u64 current_sessionid = 1; |
fd39ca9a N |
56 | |
57 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t))) | |
58 | #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t))) | |
1da177e4 | 59 | |
1da177e4 | 60 | /* forward declarations */ |
fe0750e5 | 61 | static int check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner); |
1da177e4 | 62 | |
8b671b80 BF |
63 | /* Locking: */ |
64 | ||
65 | /* Currently used for almost all code touching nfsv4 state: */ | |
353ab6e9 | 66 | static DEFINE_MUTEX(client_mutex); |
1da177e4 | 67 | |
8b671b80 BF |
68 | /* |
69 | * Currently used for the del_recall_lru and file hash table. In an | |
70 | * effort to decrease the scope of the client_mutex, this spinlock may | |
71 | * eventually cover more: | |
72 | */ | |
73 | static DEFINE_SPINLOCK(recall_lock); | |
74 | ||
fe0750e5 BF |
75 | static struct kmem_cache *openowner_slab = NULL; |
76 | static struct kmem_cache *lockowner_slab = NULL; | |
e18b890b CL |
77 | static struct kmem_cache *file_slab = NULL; |
78 | static struct kmem_cache *stateid_slab = NULL; | |
79 | static struct kmem_cache *deleg_slab = NULL; | |
e60d4398 | 80 | |
1da177e4 LT |
81 | void |
82 | nfs4_lock_state(void) | |
83 | { | |
353ab6e9 | 84 | mutex_lock(&client_mutex); |
1da177e4 LT |
85 | } |
86 | ||
87 | void | |
88 | nfs4_unlock_state(void) | |
89 | { | |
353ab6e9 | 90 | mutex_unlock(&client_mutex); |
1da177e4 LT |
91 | } |
92 | ||
93 | static inline u32 | |
94 | opaque_hashval(const void *ptr, int nbytes) | |
95 | { | |
96 | unsigned char *cptr = (unsigned char *) ptr; | |
97 | ||
98 | u32 x = 0; | |
99 | while (nbytes--) { | |
100 | x *= 37; | |
101 | x += *cptr++; | |
102 | } | |
103 | return x; | |
104 | } | |
105 | ||
1da177e4 LT |
106 | static struct list_head del_recall_lru; |
107 | ||
13cd2184 N |
108 | static inline void |
109 | put_nfs4_file(struct nfs4_file *fi) | |
110 | { | |
8b671b80 BF |
111 | if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { |
112 | list_del(&fi->fi_hash); | |
113 | spin_unlock(&recall_lock); | |
114 | iput(fi->fi_inode); | |
115 | kmem_cache_free(file_slab, fi); | |
116 | } | |
13cd2184 N |
117 | } |
118 | ||
119 | static inline void | |
120 | get_nfs4_file(struct nfs4_file *fi) | |
121 | { | |
8b671b80 | 122 | atomic_inc(&fi->fi_ref); |
13cd2184 N |
123 | } |
124 | ||
ef0f3390 | 125 | static int num_delegations; |
c2f1a551 | 126 | unsigned int max_delegations; |
ef0f3390 N |
127 | |
128 | /* | |
129 | * Open owner state (share locks) | |
130 | */ | |
131 | ||
506f275f BF |
132 | /* hash tables for open owners */ |
133 | #define OPEN_OWNER_HASH_BITS 8 | |
134 | #define OPEN_OWNER_HASH_SIZE (1 << OPEN_OWNER_HASH_BITS) | |
135 | #define OPEN_OWNER_HASH_MASK (OPEN_OWNER_HASH_SIZE - 1) | |
ef0f3390 | 136 | |
506f275f | 137 | static unsigned int open_ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername) |
ddc04c41 BF |
138 | { |
139 | unsigned int ret; | |
140 | ||
141 | ret = opaque_hashval(ownername->data, ownername->len); | |
142 | ret += clientid; | |
506f275f | 143 | return ret & OPEN_OWNER_HASH_MASK; |
ddc04c41 | 144 | } |
ef0f3390 | 145 | |
506f275f | 146 | static struct list_head open_ownerstr_hashtbl[OPEN_OWNER_HASH_SIZE]; |
ef0f3390 N |
147 | |
148 | /* hash table for nfs4_file */ | |
149 | #define FILE_HASH_BITS 8 | |
150 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
35079582 | 151 | |
6136d2b4 | 152 | struct idr stateids; |
ef0f3390 | 153 | |
ddc04c41 BF |
154 | static unsigned int file_hashval(struct inode *ino) |
155 | { | |
156 | /* XXX: why are we hashing on inode pointer, anyway? */ | |
157 | return hash_ptr(ino, FILE_HASH_BITS); | |
158 | } | |
159 | ||
ef0f3390 | 160 | static struct list_head file_hashtbl[FILE_HASH_SIZE]; |
ef0f3390 | 161 | |
998db52c | 162 | static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
f9d7562f BF |
163 | { |
164 | BUG_ON(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR])); | |
165 | atomic_inc(&fp->fi_access[oflag]); | |
166 | } | |
167 | ||
998db52c BF |
168 | static void nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
169 | { | |
170 | if (oflag == O_RDWR) { | |
171 | __nfs4_file_get_access(fp, O_RDONLY); | |
172 | __nfs4_file_get_access(fp, O_WRONLY); | |
173 | } else | |
174 | __nfs4_file_get_access(fp, oflag); | |
175 | } | |
176 | ||
177 | static void nfs4_file_put_fd(struct nfs4_file *fp, int oflag) | |
f9d7562f BF |
178 | { |
179 | if (fp->fi_fds[oflag]) { | |
180 | fput(fp->fi_fds[oflag]); | |
181 | fp->fi_fds[oflag] = NULL; | |
182 | } | |
183 | } | |
184 | ||
998db52c | 185 | static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
f9d7562f BF |
186 | { |
187 | if (atomic_dec_and_test(&fp->fi_access[oflag])) { | |
f9d7562f | 188 | nfs4_file_put_fd(fp, oflag); |
3d02fa29 BF |
189 | /* |
190 | * It's also safe to get rid of the RDWR open *if* | |
191 | * we no longer have need of the other kind of access | |
192 | * or if we already have the other kind of open: | |
193 | */ | |
194 | if (fp->fi_fds[1-oflag] | |
195 | || atomic_read(&fp->fi_access[1 - oflag]) == 0) | |
196 | nfs4_file_put_fd(fp, O_RDWR); | |
f9d7562f BF |
197 | } |
198 | } | |
199 | ||
998db52c BF |
200 | static void nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
201 | { | |
202 | if (oflag == O_RDWR) { | |
203 | __nfs4_file_put_access(fp, O_RDONLY); | |
204 | __nfs4_file_put_access(fp, O_WRONLY); | |
205 | } else | |
206 | __nfs4_file_put_access(fp, oflag); | |
207 | } | |
208 | ||
6136d2b4 | 209 | static inline int get_new_stid(struct nfs4_stid *stid) |
36d44c60 | 210 | { |
6136d2b4 BF |
211 | static int min_stateid = 0; |
212 | int new_stid; | |
213 | int error; | |
214 | ||
215 | if (!idr_pre_get(&stateids, GFP_KERNEL)) | |
216 | return -ENOMEM; | |
217 | ||
218 | error = idr_get_new_above(&stateids, stid, min_stateid, &new_stid); | |
219 | /* | |
220 | * All this code is currently serialized; the preallocation | |
221 | * above should still be ours: | |
222 | */ | |
223 | BUG_ON(error); | |
224 | /* | |
225 | * It shouldn't be a problem to reuse an opaque stateid value. | |
226 | * I don't think it is for 4.1. But with 4.0 I worry that, for | |
227 | * example, a stray write retransmission could be accepted by | |
228 | * the server when it should have been rejected. Therefore, | |
229 | * adopt a trick from the sctp code to attempt to maximize the | |
230 | * amount of time until an id is reused, by ensuring they always | |
231 | * "increase" (mod INT_MAX): | |
232 | */ | |
36d44c60 | 233 | |
6136d2b4 BF |
234 | min_stateid = new_stid+1; |
235 | if (min_stateid == INT_MAX) | |
236 | min_stateid = 0; | |
237 | return new_stid; | |
36d44c60 BF |
238 | } |
239 | ||
6136d2b4 | 240 | static inline __be32 init_stid(struct nfs4_stid *stid, struct nfs4_client *cl, unsigned char type) |
2a74aba7 BF |
241 | { |
242 | stateid_t *s = &stid->sc_stateid; | |
6136d2b4 | 243 | int new_id; |
2a74aba7 BF |
244 | |
245 | stid->sc_type = type; | |
246 | stid->sc_client = cl; | |
247 | s->si_opaque.so_clid = cl->cl_clientid; | |
6136d2b4 BF |
248 | new_id = get_new_stid(stid); |
249 | if (new_id < 0) | |
250 | return nfserr_jukebox; | |
251 | s->si_opaque.so_id = (u32)new_id; | |
2a74aba7 BF |
252 | /* Will be incremented before return to client: */ |
253 | s->si_generation = 0; | |
6136d2b4 | 254 | return 0; |
2a74aba7 BF |
255 | } |
256 | ||
1da177e4 | 257 | static struct nfs4_delegation * |
dcef0413 | 258 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_ol_stateid *stp, struct svc_fh *current_fh, u32 type) |
1da177e4 LT |
259 | { |
260 | struct nfs4_delegation *dp; | |
261 | struct nfs4_file *fp = stp->st_file; | |
6136d2b4 | 262 | __be32 status; |
1da177e4 LT |
263 | |
264 | dprintk("NFSD alloc_init_deleg\n"); | |
c3e48080 BF |
265 | /* |
266 | * Major work on the lease subsystem (for example, to support | |
267 | * calbacks on stat) will be required before we can support | |
268 | * write delegations properly. | |
269 | */ | |
270 | if (type != NFS4_OPEN_DELEGATE_READ) | |
271 | return NULL; | |
47f9940c MS |
272 | if (fp->fi_had_conflict) |
273 | return NULL; | |
c2f1a551 | 274 | if (num_delegations > max_delegations) |
ef0f3390 | 275 | return NULL; |
5b2d21c1 N |
276 | dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); |
277 | if (dp == NULL) | |
1da177e4 | 278 | return dp; |
6136d2b4 BF |
279 | status = init_stid(&dp->dl_stid, clp, NFS4_DELEG_STID); |
280 | if (status) { | |
281 | kmem_cache_free(deleg_slab, dp); | |
282 | return NULL; | |
283 | } | |
2a74aba7 BF |
284 | /* |
285 | * delegation seqid's are never incremented. The 4.1 special | |
6136d2b4 BF |
286 | * meaning of seqid 0 isn't meaningful, really, but let's avoid |
287 | * 0 anyway just for consistency and use 1: | |
2a74aba7 BF |
288 | */ |
289 | dp->dl_stid.sc_stateid.si_generation = 1; | |
ef0f3390 | 290 | num_delegations++; |
ea1da636 N |
291 | INIT_LIST_HEAD(&dp->dl_perfile); |
292 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 | 293 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
13cd2184 | 294 | get_nfs4_file(fp); |
1da177e4 | 295 | dp->dl_file = fp; |
1da177e4 | 296 | dp->dl_type = type; |
6c02eaa1 | 297 | fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); |
1da177e4 LT |
298 | dp->dl_time = 0; |
299 | atomic_set(&dp->dl_count, 1); | |
b5a1a81e | 300 | INIT_WORK(&dp->dl_recall.cb_work, nfsd4_do_callback_rpc); |
1da177e4 LT |
301 | return dp; |
302 | } | |
303 | ||
304 | void | |
305 | nfs4_put_delegation(struct nfs4_delegation *dp) | |
306 | { | |
307 | if (atomic_dec_and_test(&dp->dl_count)) { | |
308 | dprintk("NFSD: freeing dp %p\n",dp); | |
13cd2184 | 309 | put_nfs4_file(dp->dl_file); |
5b2d21c1 | 310 | kmem_cache_free(deleg_slab, dp); |
ef0f3390 | 311 | num_delegations--; |
1da177e4 LT |
312 | } |
313 | } | |
314 | ||
acfdf5c3 | 315 | static void nfs4_put_deleg_lease(struct nfs4_file *fp) |
1da177e4 | 316 | { |
acfdf5c3 BF |
317 | if (atomic_dec_and_test(&fp->fi_delegees)) { |
318 | vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); | |
319 | fp->fi_lease = NULL; | |
4ee63624 | 320 | fput(fp->fi_deleg_file); |
acfdf5c3 BF |
321 | fp->fi_deleg_file = NULL; |
322 | } | |
1da177e4 LT |
323 | } |
324 | ||
6136d2b4 BF |
325 | static void unhash_stid(struct nfs4_stid *s) |
326 | { | |
327 | idr_remove(&stateids, s->sc_stateid.si_opaque.so_id); | |
328 | } | |
329 | ||
1da177e4 LT |
330 | /* Called under the state lock. */ |
331 | static void | |
332 | unhash_delegation(struct nfs4_delegation *dp) | |
333 | { | |
6136d2b4 | 334 | unhash_stid(&dp->dl_stid); |
ea1da636 | 335 | list_del_init(&dp->dl_perclnt); |
1da177e4 | 336 | spin_lock(&recall_lock); |
5d926e8c | 337 | list_del_init(&dp->dl_perfile); |
1da177e4 LT |
338 | list_del_init(&dp->dl_recall_lru); |
339 | spin_unlock(&recall_lock); | |
acfdf5c3 | 340 | nfs4_put_deleg_lease(dp->dl_file); |
1da177e4 LT |
341 | nfs4_put_delegation(dp); |
342 | } | |
343 | ||
344 | /* | |
345 | * SETCLIENTID state | |
346 | */ | |
347 | ||
36acb66b | 348 | /* client_lock protects the client lru list and session hash table */ |
9089f1b4 BH |
349 | static DEFINE_SPINLOCK(client_lock); |
350 | ||
1da177e4 LT |
351 | /* Hash tables for nfs4_clientid state */ |
352 | #define CLIENT_HASH_BITS 4 | |
353 | #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) | |
354 | #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) | |
355 | ||
ddc04c41 BF |
356 | static unsigned int clientid_hashval(u32 id) |
357 | { | |
358 | return id & CLIENT_HASH_MASK; | |
359 | } | |
360 | ||
361 | static unsigned int clientstr_hashval(const char *name) | |
362 | { | |
363 | return opaque_hashval(name, 8) & CLIENT_HASH_MASK; | |
364 | } | |
365 | ||
1da177e4 LT |
366 | /* |
367 | * reclaim_str_hashtbl[] holds known client info from previous reset/reboot | |
368 | * used in reboot/reset lease grace period processing | |
369 | * | |
370 | * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed | |
371 | * setclientid_confirmed info. | |
372 | * | |
373 | * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed | |
374 | * setclientid info. | |
375 | * | |
376 | * client_lru holds client queue ordered by nfs4_client.cl_time | |
377 | * for lease renewal. | |
378 | * | |
379 | * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time | |
380 | * for last close replay. | |
381 | */ | |
382 | static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; | |
383 | static int reclaim_str_hashtbl_size = 0; | |
384 | static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; | |
385 | static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; | |
386 | static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; | |
387 | static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; | |
388 | static struct list_head client_lru; | |
389 | static struct list_head close_lru; | |
390 | ||
f9d7562f BF |
391 | /* |
392 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
393 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
394 | * only what share bits are currently in force, but also what | |
395 | * combinations of share bits previous opens have used. This allows us | |
396 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
397 | * return an error if the client attempt to downgrade to a combination | |
398 | * of share bits not explicable by closing some of its previous opens. | |
399 | * | |
400 | * XXX: This enforcement is actually incomplete, since we don't keep | |
401 | * track of access/deny bit combinations; so, e.g., we allow: | |
402 | * | |
403 | * OPEN allow read, deny write | |
404 | * OPEN allow both, deny none | |
405 | * DOWNGRADE allow read, deny none | |
406 | * | |
407 | * which we should reject. | |
408 | */ | |
409 | static void | |
410 | set_access(unsigned int *access, unsigned long bmap) { | |
411 | int i; | |
412 | ||
413 | *access = 0; | |
414 | for (i = 1; i < 4; i++) { | |
415 | if (test_bit(i, &bmap)) | |
416 | *access |= i; | |
417 | } | |
418 | } | |
419 | ||
420 | static void | |
421 | set_deny(unsigned int *deny, unsigned long bmap) { | |
422 | int i; | |
423 | ||
424 | *deny = 0; | |
425 | for (i = 0; i < 4; i++) { | |
426 | if (test_bit(i, &bmap)) | |
427 | *deny |= i ; | |
428 | } | |
429 | } | |
430 | ||
431 | static int | |
dcef0413 | 432 | test_share(struct nfs4_ol_stateid *stp, struct nfsd4_open *open) { |
f9d7562f BF |
433 | unsigned int access, deny; |
434 | ||
435 | set_access(&access, stp->st_access_bmap); | |
436 | set_deny(&deny, stp->st_deny_bmap); | |
437 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) | |
438 | return 0; | |
439 | return 1; | |
440 | } | |
441 | ||
442 | static int nfs4_access_to_omode(u32 access) | |
443 | { | |
8f34a430 | 444 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
445 | case NFS4_SHARE_ACCESS_READ: |
446 | return O_RDONLY; | |
447 | case NFS4_SHARE_ACCESS_WRITE: | |
448 | return O_WRONLY; | |
449 | case NFS4_SHARE_ACCESS_BOTH: | |
450 | return O_RDWR; | |
451 | } | |
452 | BUG(); | |
453 | } | |
454 | ||
dcef0413 | 455 | static void unhash_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 456 | { |
529d7b2a BF |
457 | list_del(&stp->st_perfile); |
458 | list_del(&stp->st_perstateowner); | |
459 | } | |
460 | ||
dcef0413 | 461 | static void close_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 462 | { |
499f3edc | 463 | int i; |
0997b173 | 464 | |
23fcf2ec | 465 | if (stp->st_access_bmap) { |
499f3edc BF |
466 | for (i = 1; i < 4; i++) { |
467 | if (test_bit(i, &stp->st_access_bmap)) | |
468 | nfs4_file_put_access(stp->st_file, | |
469 | nfs4_access_to_omode(i)); | |
4665e2ba | 470 | __clear_bit(i, &stp->st_access_bmap); |
499f3edc | 471 | } |
23fcf2ec | 472 | } |
a96e5b90 | 473 | put_nfs4_file(stp->st_file); |
4665e2ba BF |
474 | stp->st_file = NULL; |
475 | } | |
476 | ||
dcef0413 | 477 | static void free_generic_stateid(struct nfs4_ol_stateid *stp) |
4665e2ba | 478 | { |
529d7b2a BF |
479 | kmem_cache_free(stateid_slab, stp); |
480 | } | |
481 | ||
dcef0413 | 482 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a BF |
483 | { |
484 | struct file *file; | |
485 | ||
486 | unhash_generic_stateid(stp); | |
6136d2b4 | 487 | unhash_stid(&stp->st_stid); |
529d7b2a BF |
488 | file = find_any_file(stp->st_file); |
489 | if (file) | |
fe0750e5 | 490 | locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner)); |
38c387b5 | 491 | close_generic_stateid(stp); |
529d7b2a BF |
492 | free_generic_stateid(stp); |
493 | } | |
494 | ||
fe0750e5 | 495 | static void unhash_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 496 | { |
dcef0413 | 497 | struct nfs4_ol_stateid *stp; |
529d7b2a | 498 | |
fe0750e5 BF |
499 | list_del(&lo->lo_owner.so_strhash); |
500 | list_del(&lo->lo_perstateid); | |
501 | while (!list_empty(&lo->lo_owner.so_stateids)) { | |
502 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
dcef0413 | 503 | struct nfs4_ol_stateid, st_perstateowner); |
529d7b2a BF |
504 | release_lock_stateid(stp); |
505 | } | |
506 | } | |
507 | ||
fe0750e5 | 508 | static void release_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 509 | { |
fe0750e5 BF |
510 | unhash_lockowner(lo); |
511 | nfs4_free_lockowner(lo); | |
529d7b2a BF |
512 | } |
513 | ||
514 | static void | |
dcef0413 | 515 | release_stateid_lockowners(struct nfs4_ol_stateid *open_stp) |
529d7b2a | 516 | { |
fe0750e5 | 517 | struct nfs4_lockowner *lo; |
529d7b2a BF |
518 | |
519 | while (!list_empty(&open_stp->st_lockowners)) { | |
fe0750e5 BF |
520 | lo = list_entry(open_stp->st_lockowners.next, |
521 | struct nfs4_lockowner, lo_perstateid); | |
522 | release_lockowner(lo); | |
529d7b2a BF |
523 | } |
524 | } | |
525 | ||
38c387b5 | 526 | static void unhash_open_stateid(struct nfs4_ol_stateid *stp) |
2283963f BF |
527 | { |
528 | unhash_generic_stateid(stp); | |
529 | release_stateid_lockowners(stp); | |
38c387b5 BF |
530 | close_generic_stateid(stp); |
531 | } | |
532 | ||
533 | static void release_open_stateid(struct nfs4_ol_stateid *stp) | |
534 | { | |
535 | unhash_open_stateid(stp); | |
6136d2b4 | 536 | unhash_stid(&stp->st_stid); |
2283963f BF |
537 | free_generic_stateid(stp); |
538 | } | |
539 | ||
fe0750e5 | 540 | static void unhash_openowner(struct nfs4_openowner *oo) |
f1d110ca | 541 | { |
dcef0413 | 542 | struct nfs4_ol_stateid *stp; |
f1d110ca | 543 | |
fe0750e5 BF |
544 | list_del(&oo->oo_owner.so_strhash); |
545 | list_del(&oo->oo_perclient); | |
546 | while (!list_empty(&oo->oo_owner.so_stateids)) { | |
547 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
dcef0413 | 548 | struct nfs4_ol_stateid, st_perstateowner); |
f044ff83 | 549 | release_open_stateid(stp); |
f1d110ca BF |
550 | } |
551 | } | |
552 | ||
f7a4d872 BF |
553 | static void release_last_closed_stateid(struct nfs4_openowner *oo) |
554 | { | |
555 | struct nfs4_ol_stateid *s = oo->oo_last_closed_stid; | |
556 | ||
557 | if (s) { | |
6136d2b4 | 558 | unhash_stid(&s->st_stid); |
f7a4d872 BF |
559 | free_generic_stateid(s); |
560 | oo->oo_last_closed_stid = NULL; | |
561 | } | |
562 | } | |
563 | ||
fe0750e5 | 564 | static void release_openowner(struct nfs4_openowner *oo) |
f1d110ca | 565 | { |
fe0750e5 BF |
566 | unhash_openowner(oo); |
567 | list_del(&oo->oo_close_lru); | |
f7a4d872 | 568 | release_last_closed_stateid(oo); |
fe0750e5 | 569 | nfs4_free_openowner(oo); |
f1d110ca BF |
570 | } |
571 | ||
5282fd72 ME |
572 | #define SESSION_HASH_SIZE 512 |
573 | static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; | |
574 | ||
575 | static inline int | |
576 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
577 | { | |
578 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
579 | ||
580 | return sid->sequence % SESSION_HASH_SIZE; | |
581 | } | |
582 | ||
583 | static inline void | |
584 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
585 | { | |
586 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
587 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
588 | } | |
589 | ||
ec6b5d7b AA |
590 | static void |
591 | gen_sessionid(struct nfsd4_session *ses) | |
592 | { | |
593 | struct nfs4_client *clp = ses->se_client; | |
594 | struct nfsd4_sessionid *sid; | |
595 | ||
596 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
597 | sid->clientid = clp->cl_clientid; | |
598 | sid->sequence = current_sessionid++; | |
599 | sid->reserved = 0; | |
600 | } | |
601 | ||
602 | /* | |
a649637c AA |
603 | * The protocol defines ca_maxresponssize_cached to include the size of |
604 | * the rpc header, but all we need to cache is the data starting after | |
605 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
606 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
607 | * value that is the number of bytes in our cache plus a few additional | |
608 | * bytes. In order to stay on the safe side, and not promise more than | |
609 | * we can cache, those additional bytes must be the minimum possible: 24 | |
610 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
611 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
612 | * for the SEQUENCE op response: | |
613 | */ | |
614 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
615 | ||
557ce264 AA |
616 | static void |
617 | free_session_slots(struct nfsd4_session *ses) | |
618 | { | |
619 | int i; | |
620 | ||
621 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
622 | kfree(ses->se_slots[i]); | |
623 | } | |
624 | ||
a649637c | 625 | /* |
efe0cb6d BF |
626 | * We don't actually need to cache the rpc and session headers, so we |
627 | * can allocate a little less for each slot: | |
628 | */ | |
629 | static inline int slot_bytes(struct nfsd4_channel_attrs *ca) | |
630 | { | |
631 | return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
632 | } | |
633 | ||
5b6feee9 | 634 | static int nfsd4_sanitize_slot_size(u32 size) |
ec6b5d7b | 635 | { |
5b6feee9 BF |
636 | size -= NFSD_MIN_HDR_SEQ_SZ; /* We don't cache the rpc header */ |
637 | size = min_t(u32, size, NFSD_SLOT_CACHE_SIZE); | |
ec6b5d7b | 638 | |
5b6feee9 BF |
639 | return size; |
640 | } | |
ec6b5d7b | 641 | |
5b6feee9 BF |
642 | /* |
643 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c AA |
644 | * re-negotiate active sessions and reduce their slot usage to make |
645 | * rooom for new connections. For now we just fail the create session. | |
ec6b5d7b | 646 | */ |
5b6feee9 | 647 | static int nfsd4_get_drc_mem(int slotsize, u32 num) |
ec6b5d7b | 648 | { |
5b6feee9 | 649 | int avail; |
ec6b5d7b | 650 | |
5b6feee9 | 651 | num = min_t(u32, num, NFSD_MAX_SLOTS_PER_SESSION); |
5d77ddfb | 652 | |
5b6feee9 BF |
653 | spin_lock(&nfsd_drc_lock); |
654 | avail = min_t(int, NFSD_MAX_MEM_PER_SESSION, | |
655 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
656 | num = min_t(int, num, avail / slotsize); | |
657 | nfsd_drc_mem_used += num * slotsize; | |
658 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 659 | |
5b6feee9 BF |
660 | return num; |
661 | } | |
ec6b5d7b | 662 | |
5b6feee9 BF |
663 | static void nfsd4_put_drc_mem(int slotsize, int num) |
664 | { | |
4bd9b0f4 | 665 | spin_lock(&nfsd_drc_lock); |
5b6feee9 | 666 | nfsd_drc_mem_used -= slotsize * num; |
4bd9b0f4 | 667 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 668 | } |
ec6b5d7b | 669 | |
5b6feee9 BF |
670 | static struct nfsd4_session *alloc_session(int slotsize, int numslots) |
671 | { | |
672 | struct nfsd4_session *new; | |
673 | int mem, i; | |
a649637c | 674 | |
5b6feee9 BF |
675 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
676 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
677 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 678 | |
5b6feee9 BF |
679 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
680 | if (!new) | |
681 | return NULL; | |
557ce264 | 682 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 BF |
683 | for (i = 0; i < numslots; i++) { |
684 | mem = sizeof(struct nfsd4_slot) + slotsize; | |
685 | new->se_slots[i] = kzalloc(mem, GFP_KERNEL); | |
686 | if (!new->se_slots[i]) | |
557ce264 | 687 | goto out_free; |
557ce264 | 688 | } |
5b6feee9 BF |
689 | return new; |
690 | out_free: | |
691 | while (i--) | |
692 | kfree(new->se_slots[i]); | |
693 | kfree(new); | |
694 | return NULL; | |
ec6b5d7b AA |
695 | } |
696 | ||
5b6feee9 | 697 | static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, struct nfsd4_channel_attrs *req, int numslots, int slotsize) |
ec6b5d7b | 698 | { |
5b6feee9 | 699 | u32 maxrpc = nfsd_serv->sv_max_mesg; |
ec6b5d7b | 700 | |
5b6feee9 | 701 | new->maxreqs = numslots; |
d2b21743 MJ |
702 | new->maxresp_cached = min_t(u32, req->maxresp_cached, |
703 | slotsize + NFSD_MIN_HDR_SEQ_SZ); | |
5b6feee9 BF |
704 | new->maxreq_sz = min_t(u32, req->maxreq_sz, maxrpc); |
705 | new->maxresp_sz = min_t(u32, req->maxresp_sz, maxrpc); | |
706 | new->maxops = min_t(u32, req->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
707 | } | |
ec6b5d7b | 708 | |
19cf5c02 BF |
709 | static void free_conn(struct nfsd4_conn *c) |
710 | { | |
711 | svc_xprt_put(c->cn_xprt); | |
712 | kfree(c); | |
713 | } | |
ec6b5d7b | 714 | |
19cf5c02 BF |
715 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
716 | { | |
717 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
718 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 719 | |
19cf5c02 BF |
720 | spin_lock(&clp->cl_lock); |
721 | if (!list_empty(&c->cn_persession)) { | |
722 | list_del(&c->cn_persession); | |
723 | free_conn(c); | |
724 | } | |
725 | spin_unlock(&clp->cl_lock); | |
eea49806 | 726 | nfsd4_probe_callback(clp); |
19cf5c02 | 727 | } |
ec6b5d7b | 728 | |
d29c374c | 729 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 730 | { |
c7662518 | 731 | struct nfsd4_conn *conn; |
ec6b5d7b | 732 | |
c7662518 BF |
733 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
734 | if (!conn) | |
db90681d | 735 | return NULL; |
c7662518 BF |
736 | svc_xprt_get(rqstp->rq_xprt); |
737 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 738 | conn->cn_flags = flags; |
db90681d BF |
739 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
740 | return conn; | |
741 | } | |
a649637c | 742 | |
328ead28 BF |
743 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
744 | { | |
745 | conn->cn_session = ses; | |
746 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
747 | } |
748 | ||
db90681d | 749 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 750 | { |
db90681d | 751 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 752 | |
c7662518 | 753 | spin_lock(&clp->cl_lock); |
328ead28 | 754 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 755 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
756 | } |
757 | ||
21b75b01 | 758 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 759 | { |
19cf5c02 | 760 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 761 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
762 | } |
763 | ||
1d1bc8f2 | 764 | static __be32 nfsd4_new_conn(struct svc_rqst *rqstp, struct nfsd4_session *ses, u32 dir) |
ec6b5d7b | 765 | { |
db90681d | 766 | struct nfsd4_conn *conn; |
21b75b01 | 767 | int ret; |
ec6b5d7b | 768 | |
1d1bc8f2 | 769 | conn = alloc_conn(rqstp, dir); |
db90681d BF |
770 | if (!conn) |
771 | return nfserr_jukebox; | |
772 | nfsd4_hash_conn(conn, ses); | |
21b75b01 BF |
773 | ret = nfsd4_register_conn(conn); |
774 | if (ret) | |
775 | /* oops; xprt is already down: */ | |
776 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
c7662518 BF |
777 | return nfs_ok; |
778 | } | |
ec6b5d7b | 779 | |
1d1bc8f2 BF |
780 | static __be32 nfsd4_new_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_session *ses) |
781 | { | |
782 | u32 dir = NFS4_CDFC4_FORE; | |
783 | ||
784 | if (ses->se_flags & SESSION4_BACK_CHAN) | |
785 | dir |= NFS4_CDFC4_BACK; | |
786 | ||
787 | return nfsd4_new_conn(rqstp, ses, dir); | |
788 | } | |
789 | ||
790 | /* must be called under client_lock */ | |
19cf5c02 | 791 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 792 | { |
19cf5c02 BF |
793 | struct nfs4_client *clp = s->se_client; |
794 | struct nfsd4_conn *c; | |
ec6b5d7b | 795 | |
19cf5c02 BF |
796 | spin_lock(&clp->cl_lock); |
797 | while (!list_empty(&s->se_conns)) { | |
798 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
799 | list_del_init(&c->cn_persession); | |
800 | spin_unlock(&clp->cl_lock); | |
557ce264 | 801 | |
19cf5c02 BF |
802 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
803 | free_conn(c); | |
ec6b5d7b | 804 | |
19cf5c02 BF |
805 | spin_lock(&clp->cl_lock); |
806 | } | |
807 | spin_unlock(&clp->cl_lock); | |
c7662518 | 808 | } |
ec6b5d7b | 809 | |
c7662518 BF |
810 | void free_session(struct kref *kref) |
811 | { | |
812 | struct nfsd4_session *ses; | |
813 | int mem; | |
814 | ||
815 | ses = container_of(kref, struct nfsd4_session, se_ref); | |
19cf5c02 | 816 | nfsd4_del_conns(ses); |
c7662518 BF |
817 | spin_lock(&nfsd_drc_lock); |
818 | mem = ses->se_fchannel.maxreqs * slot_bytes(&ses->se_fchannel); | |
819 | nfsd_drc_mem_used -= mem; | |
820 | spin_unlock(&nfsd_drc_lock); | |
821 | free_session_slots(ses); | |
822 | kfree(ses); | |
823 | } | |
824 | ||
ac7c46f2 | 825 | static struct nfsd4_session *alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
5b6feee9 BF |
826 | { |
827 | struct nfsd4_session *new; | |
828 | struct nfsd4_channel_attrs *fchan = &cses->fore_channel; | |
829 | int numslots, slotsize; | |
c7662518 | 830 | int status; |
5b6feee9 BF |
831 | int idx; |
832 | ||
833 | /* | |
834 | * Note decreasing slot size below client's request may | |
835 | * make it difficult for client to function correctly, whereas | |
836 | * decreasing the number of slots will (just?) affect | |
837 | * performance. When short on memory we therefore prefer to | |
838 | * decrease number of slots instead of their size. | |
839 | */ | |
840 | slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached); | |
841 | numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs); | |
ced6dfe9 MJ |
842 | if (numslots < 1) |
843 | return NULL; | |
5b6feee9 BF |
844 | |
845 | new = alloc_session(slotsize, numslots); | |
846 | if (!new) { | |
847 | nfsd4_put_drc_mem(slotsize, fchan->maxreqs); | |
ac7c46f2 | 848 | return NULL; |
557ce264 | 849 | } |
5b6feee9 | 850 | init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize); |
557ce264 | 851 | |
ec6b5d7b AA |
852 | new->se_client = clp; |
853 | gen_sessionid(new); | |
ec6b5d7b | 854 | |
c7662518 BF |
855 | INIT_LIST_HEAD(&new->se_conns); |
856 | ||
ac7c46f2 | 857 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 858 | new->se_flags = cses->flags; |
8b5ce5cd | 859 | new->se_cb_prog = cses->callback_prog; |
ec6b5d7b | 860 | kref_init(&new->se_ref); |
5b6feee9 | 861 | idx = hash_sessionid(&new->se_sessionid); |
9089f1b4 | 862 | spin_lock(&client_lock); |
ec6b5d7b | 863 | list_add(&new->se_hash, &sessionid_hashtbl[idx]); |
4c649378 | 864 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 865 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 866 | spin_unlock(&clp->cl_lock); |
9089f1b4 | 867 | spin_unlock(&client_lock); |
ec6b5d7b | 868 | |
1d1bc8f2 | 869 | status = nfsd4_new_conn_from_crses(rqstp, new); |
ac7c46f2 | 870 | /* whoops: benny points out, status is ignored! (err, or bogus) */ |
c7662518 BF |
871 | if (status) { |
872 | free_session(&new->se_ref); | |
ac7c46f2 | 873 | return NULL; |
c7662518 | 874 | } |
dcbeaa68 | 875 | if (cses->flags & SESSION4_BACK_CHAN) { |
edd76786 | 876 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
877 | /* |
878 | * This is a little silly; with sessions there's no real | |
879 | * use for the callback address. Use the peer address | |
880 | * as a reasonable default for now, but consider fixing | |
881 | * the rpc client not to require an address in the | |
882 | * future: | |
883 | */ | |
edd76786 BF |
884 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
885 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 886 | } |
dcbeaa68 | 887 | nfsd4_probe_callback(clp); |
ac7c46f2 | 888 | return new; |
ec6b5d7b AA |
889 | } |
890 | ||
9089f1b4 | 891 | /* caller must hold client_lock */ |
5282fd72 ME |
892 | static struct nfsd4_session * |
893 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) | |
894 | { | |
895 | struct nfsd4_session *elem; | |
896 | int idx; | |
897 | ||
898 | dump_sessionid(__func__, sessionid); | |
899 | idx = hash_sessionid(sessionid); | |
5282fd72 ME |
900 | /* Search in the appropriate list */ |
901 | list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { | |
5282fd72 ME |
902 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
903 | NFS4_MAX_SESSIONID_LEN)) { | |
904 | return elem; | |
905 | } | |
906 | } | |
907 | ||
908 | dprintk("%s: session not found\n", __func__); | |
909 | return NULL; | |
910 | } | |
911 | ||
9089f1b4 | 912 | /* caller must hold client_lock */ |
7116ed6b | 913 | static void |
5282fd72 | 914 | unhash_session(struct nfsd4_session *ses) |
7116ed6b AA |
915 | { |
916 | list_del(&ses->se_hash); | |
4c649378 | 917 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 918 | list_del(&ses->se_perclnt); |
4c649378 | 919 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
920 | } |
921 | ||
36acb66b | 922 | /* must be called under the client_lock */ |
1da177e4 | 923 | static inline void |
36acb66b | 924 | renew_client_locked(struct nfs4_client *clp) |
1da177e4 | 925 | { |
07cd4909 BH |
926 | if (is_client_expired(clp)) { |
927 | dprintk("%s: client (clientid %08x/%08x) already expired\n", | |
928 | __func__, | |
929 | clp->cl_clientid.cl_boot, | |
930 | clp->cl_clientid.cl_id); | |
931 | return; | |
932 | } | |
933 | ||
1da177e4 LT |
934 | /* |
935 | * Move client to the end to the LRU list. | |
936 | */ | |
937 | dprintk("renewing client (clientid %08x/%08x)\n", | |
938 | clp->cl_clientid.cl_boot, | |
939 | clp->cl_clientid.cl_id); | |
940 | list_move_tail(&clp->cl_lru, &client_lru); | |
941 | clp->cl_time = get_seconds(); | |
942 | } | |
943 | ||
36acb66b BH |
944 | static inline void |
945 | renew_client(struct nfs4_client *clp) | |
946 | { | |
947 | spin_lock(&client_lock); | |
948 | renew_client_locked(clp); | |
949 | spin_unlock(&client_lock); | |
950 | } | |
951 | ||
1da177e4 LT |
952 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
953 | static int | |
954 | STALE_CLIENTID(clientid_t *clid) | |
955 | { | |
956 | if (clid->cl_boot == boot_time) | |
957 | return 0; | |
60adfc50 AA |
958 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
959 | clid->cl_boot, clid->cl_id, boot_time); | |
1da177e4 LT |
960 | return 1; |
961 | } | |
962 | ||
963 | /* | |
964 | * XXX Should we use a slab cache ? | |
965 | * This type of memory management is somewhat inefficient, but we use it | |
966 | * anyway since SETCLIENTID is not a common operation. | |
967 | */ | |
35bba9a3 | 968 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
969 | { |
970 | struct nfs4_client *clp; | |
971 | ||
35bba9a3 BF |
972 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
973 | if (clp == NULL) | |
974 | return NULL; | |
975 | clp->cl_name.data = kmalloc(name.len, GFP_KERNEL); | |
976 | if (clp->cl_name.data == NULL) { | |
977 | kfree(clp); | |
978 | return NULL; | |
1da177e4 | 979 | } |
35bba9a3 BF |
980 | memcpy(clp->cl_name.data, name.data, name.len); |
981 | clp->cl_name.len = name.len; | |
1da177e4 LT |
982 | return clp; |
983 | } | |
984 | ||
985 | static inline void | |
986 | free_client(struct nfs4_client *clp) | |
987 | { | |
792c95dd BF |
988 | while (!list_empty(&clp->cl_sessions)) { |
989 | struct nfsd4_session *ses; | |
990 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
991 | se_perclnt); | |
992 | list_del(&ses->se_perclnt); | |
993 | nfsd4_put_session(ses); | |
994 | } | |
1da177e4 LT |
995 | if (clp->cl_cred.cr_group_info) |
996 | put_group_info(clp->cl_cred.cr_group_info); | |
68e76ad0 | 997 | kfree(clp->cl_principal); |
1da177e4 LT |
998 | kfree(clp->cl_name.data); |
999 | kfree(clp); | |
1000 | } | |
1001 | ||
d7682988 BH |
1002 | void |
1003 | release_session_client(struct nfsd4_session *session) | |
1004 | { | |
1005 | struct nfs4_client *clp = session->se_client; | |
1006 | ||
1007 | if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock)) | |
1008 | return; | |
1009 | if (is_client_expired(clp)) { | |
1010 | free_client(clp); | |
1011 | session->se_client = NULL; | |
1012 | } else | |
1013 | renew_client_locked(clp); | |
1014 | spin_unlock(&client_lock); | |
d7682988 BH |
1015 | } |
1016 | ||
84d38ac9 BH |
1017 | /* must be called under the client_lock */ |
1018 | static inline void | |
1019 | unhash_client_locked(struct nfs4_client *clp) | |
1020 | { | |
792c95dd BF |
1021 | struct nfsd4_session *ses; |
1022 | ||
07cd4909 | 1023 | mark_client_expired(clp); |
84d38ac9 | 1024 | list_del(&clp->cl_lru); |
4c649378 | 1025 | spin_lock(&clp->cl_lock); |
792c95dd BF |
1026 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
1027 | list_del_init(&ses->se_hash); | |
4c649378 | 1028 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
1029 | } |
1030 | ||
1da177e4 LT |
1031 | static void |
1032 | expire_client(struct nfs4_client *clp) | |
1033 | { | |
fe0750e5 | 1034 | struct nfs4_openowner *oo; |
1da177e4 | 1035 | struct nfs4_delegation *dp; |
1da177e4 LT |
1036 | struct list_head reaplist; |
1037 | ||
1da177e4 LT |
1038 | INIT_LIST_HEAD(&reaplist); |
1039 | spin_lock(&recall_lock); | |
ea1da636 N |
1040 | while (!list_empty(&clp->cl_delegations)) { |
1041 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
ea1da636 | 1042 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
1043 | list_move(&dp->dl_recall_lru, &reaplist); |
1044 | } | |
1045 | spin_unlock(&recall_lock); | |
1046 | while (!list_empty(&reaplist)) { | |
1047 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
1048 | list_del_init(&dp->dl_recall_lru); | |
1049 | unhash_delegation(dp); | |
1050 | } | |
ea1da636 | 1051 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 BF |
1052 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
1053 | release_openowner(oo); | |
1da177e4 | 1054 | } |
6ff8da08 | 1055 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
1056 | if (clp->cl_cb_conn.cb_xprt) |
1057 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
36acb66b BH |
1058 | list_del(&clp->cl_idhash); |
1059 | list_del(&clp->cl_strhash); | |
be1fdf6c | 1060 | spin_lock(&client_lock); |
84d38ac9 | 1061 | unhash_client_locked(clp); |
46583e25 BH |
1062 | if (atomic_read(&clp->cl_refcount) == 0) |
1063 | free_client(clp); | |
be1fdf6c | 1064 | spin_unlock(&client_lock); |
1da177e4 LT |
1065 | } |
1066 | ||
35bba9a3 BF |
1067 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
1068 | { | |
1069 | memcpy(target->cl_verifier.data, source->data, | |
1070 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
1071 | } |
1072 | ||
35bba9a3 BF |
1073 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
1074 | { | |
1da177e4 LT |
1075 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
1076 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
1077 | } | |
1078 | ||
35bba9a3 BF |
1079 | static void copy_cred(struct svc_cred *target, struct svc_cred *source) |
1080 | { | |
1da177e4 LT |
1081 | target->cr_uid = source->cr_uid; |
1082 | target->cr_gid = source->cr_gid; | |
1083 | target->cr_group_info = source->cr_group_info; | |
1084 | get_group_info(target->cr_group_info); | |
1085 | } | |
1086 | ||
35bba9a3 | 1087 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 1088 | { |
a55370a3 | 1089 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
1090 | } |
1091 | ||
1092 | static int | |
599e0a22 BF |
1093 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1094 | { | |
1095 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
1096 | } |
1097 | ||
1098 | static int | |
599e0a22 BF |
1099 | same_clid(clientid_t *cl1, clientid_t *cl2) |
1100 | { | |
1101 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1102 | } |
1103 | ||
1104 | /* XXX what about NGROUP */ | |
1105 | static int | |
599e0a22 BF |
1106 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
1107 | { | |
1108 | return cr1->cr_uid == cr2->cr_uid; | |
1da177e4 LT |
1109 | } |
1110 | ||
5ec7b46c BF |
1111 | static void gen_clid(struct nfs4_client *clp) |
1112 | { | |
1113 | static u32 current_clientid = 1; | |
1114 | ||
1da177e4 LT |
1115 | clp->cl_clientid.cl_boot = boot_time; |
1116 | clp->cl_clientid.cl_id = current_clientid++; | |
1117 | } | |
1118 | ||
deda2faa BF |
1119 | static void gen_confirm(struct nfs4_client *clp) |
1120 | { | |
1121 | static u32 i; | |
1122 | u32 *p; | |
1da177e4 | 1123 | |
1da177e4 | 1124 | p = (u32 *)clp->cl_confirm.data; |
deda2faa BF |
1125 | *p++ = get_seconds(); |
1126 | *p++ = i++; | |
1da177e4 LT |
1127 | } |
1128 | ||
f459e453 | 1129 | static struct nfs4_stid *find_stateid(stateid_t *t) |
4581d140 | 1130 | { |
6136d2b4 | 1131 | return idr_find(&stateids, t->si_opaque.so_id); |
4d71ab87 BF |
1132 | } |
1133 | ||
f459e453 BF |
1134 | static struct nfs4_stid *find_stateid_by_type(stateid_t *t, char typemask) |
1135 | { | |
1136 | struct nfs4_stid *s; | |
4d71ab87 BF |
1137 | |
1138 | s = find_stateid(t); | |
1139 | if (!s) | |
1140 | return NULL; | |
f459e453 | 1141 | if (typemask & s->sc_type) |
4581d140 | 1142 | return s; |
4581d140 BF |
1143 | return NULL; |
1144 | } | |
1145 | ||
f459e453 BF |
1146 | static struct nfs4_ol_stateid *find_ol_stateid_by_type(stateid_t *t, char typemask) |
1147 | { | |
1148 | struct nfs4_stid *s; | |
1149 | ||
1150 | s = find_stateid_by_type(t, typemask); | |
1151 | if (!s) | |
1152 | return NULL; | |
1153 | return openlockstateid(s); | |
1154 | } | |
1155 | ||
b09333c4 RL |
1156 | static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, |
1157 | struct svc_rqst *rqstp, nfs4_verifier *verf) | |
1158 | { | |
1159 | struct nfs4_client *clp; | |
1160 | struct sockaddr *sa = svc_addr(rqstp); | |
1161 | char *princ; | |
1162 | ||
1163 | clp = alloc_client(name); | |
1164 | if (clp == NULL) | |
1165 | return NULL; | |
1166 | ||
792c95dd BF |
1167 | INIT_LIST_HEAD(&clp->cl_sessions); |
1168 | ||
b09333c4 RL |
1169 | princ = svc_gss_principal(rqstp); |
1170 | if (princ) { | |
1171 | clp->cl_principal = kstrdup(princ, GFP_KERNEL); | |
1172 | if (clp->cl_principal == NULL) { | |
1173 | free_client(clp); | |
1174 | return NULL; | |
1175 | } | |
1176 | } | |
1177 | ||
1178 | memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); | |
46583e25 | 1179 | atomic_set(&clp->cl_refcount, 0); |
77a3569d | 1180 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; |
b09333c4 RL |
1181 | INIT_LIST_HEAD(&clp->cl_idhash); |
1182 | INIT_LIST_HEAD(&clp->cl_strhash); | |
1183 | INIT_LIST_HEAD(&clp->cl_openowners); | |
1184 | INIT_LIST_HEAD(&clp->cl_delegations); | |
b09333c4 | 1185 | INIT_LIST_HEAD(&clp->cl_lru); |
5ce8ba25 | 1186 | INIT_LIST_HEAD(&clp->cl_callbacks); |
6ff8da08 | 1187 | spin_lock_init(&clp->cl_lock); |
cee277d9 | 1188 | INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_do_callback_rpc); |
07cd4909 | 1189 | clp->cl_time = get_seconds(); |
b09333c4 RL |
1190 | clear_bit(0, &clp->cl_cb_slot_busy); |
1191 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1192 | copy_verf(clp, verf); | |
1193 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
1194 | clp->cl_flavor = rqstp->rq_flavor; | |
1195 | copy_cred(&clp->cl_cred, &rqstp->rq_cred); | |
1196 | gen_confirm(clp); | |
edd76786 | 1197 | clp->cl_cb_session = NULL; |
b09333c4 RL |
1198 | return clp; |
1199 | } | |
1200 | ||
35bba9a3 BF |
1201 | static int check_name(struct xdr_netobj name) |
1202 | { | |
1da177e4 LT |
1203 | if (name.len == 0) |
1204 | return 0; | |
1205 | if (name.len > NFS4_OPAQUE_LIMIT) { | |
2fdada03 | 1206 | dprintk("NFSD: check_name: name too long(%d)!\n", name.len); |
1da177e4 LT |
1207 | return 0; |
1208 | } | |
1209 | return 1; | |
1210 | } | |
1211 | ||
fd39ca9a | 1212 | static void |
1da177e4 LT |
1213 | add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) |
1214 | { | |
1215 | unsigned int idhashval; | |
1216 | ||
1217 | list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); | |
1218 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
1219 | list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); | |
36acb66b | 1220 | renew_client(clp); |
1da177e4 LT |
1221 | } |
1222 | ||
fd39ca9a | 1223 | static void |
1da177e4 LT |
1224 | move_to_confirmed(struct nfs4_client *clp) |
1225 | { | |
1226 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
1227 | unsigned int strhashval; | |
1228 | ||
1229 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
f116629d | 1230 | list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); |
a55370a3 | 1231 | strhashval = clientstr_hashval(clp->cl_recdir); |
328efbab | 1232 | list_move(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); |
1da177e4 LT |
1233 | renew_client(clp); |
1234 | } | |
1235 | ||
1236 | static struct nfs4_client * | |
1237 | find_confirmed_client(clientid_t *clid) | |
1238 | { | |
1239 | struct nfs4_client *clp; | |
1240 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1241 | ||
1242 | list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 1243 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
1244 | return clp; |
1245 | } | |
1246 | return NULL; | |
1247 | } | |
1248 | ||
1249 | static struct nfs4_client * | |
1250 | find_unconfirmed_client(clientid_t *clid) | |
1251 | { | |
1252 | struct nfs4_client *clp; | |
1253 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1254 | ||
1255 | list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 1256 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
1257 | return clp; |
1258 | } | |
1259 | return NULL; | |
1260 | } | |
1261 | ||
6e5f15c9 | 1262 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 1263 | { |
6e5f15c9 | 1264 | return clp->cl_exchange_flags != 0; |
e203d506 | 1265 | } |
a1bcecd2 | 1266 | |
28ce6054 | 1267 | static struct nfs4_client * |
e203d506 | 1268 | find_confirmed_client_by_str(const char *dname, unsigned int hashval) |
28ce6054 N |
1269 | { |
1270 | struct nfs4_client *clp; | |
1271 | ||
1272 | list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { | |
e203d506 | 1273 | if (same_name(clp->cl_recdir, dname)) |
28ce6054 N |
1274 | return clp; |
1275 | } | |
1276 | return NULL; | |
1277 | } | |
1278 | ||
1279 | static struct nfs4_client * | |
e203d506 | 1280 | find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) |
28ce6054 N |
1281 | { |
1282 | struct nfs4_client *clp; | |
1283 | ||
1284 | list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { | |
e203d506 | 1285 | if (same_name(clp->cl_recdir, dname)) |
28ce6054 N |
1286 | return clp; |
1287 | } | |
1288 | return NULL; | |
1289 | } | |
1290 | ||
fd39ca9a | 1291 | static void |
6f3d772f | 1292 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 1293 | { |
07263f1e | 1294 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
1295 | struct sockaddr *sa = svc_addr(rqstp); |
1296 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
1297 | unsigned short expected_family; |
1298 | ||
1299 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
1300 | if (se->se_callback_netid_len == 3 && | |
1301 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
1302 | expected_family = AF_INET; | |
1303 | else if (se->se_callback_netid_len == 4 && | |
1304 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
1305 | expected_family = AF_INET6; | |
1306 | else | |
1da177e4 LT |
1307 | goto out_err; |
1308 | ||
07263f1e | 1309 | conn->cb_addrlen = rpc_uaddr2sockaddr(se->se_callback_addr_val, |
aa9a4ec7 | 1310 | se->se_callback_addr_len, |
07263f1e BF |
1311 | (struct sockaddr *)&conn->cb_addr, |
1312 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 1313 | |
07263f1e | 1314 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 1315 | goto out_err; |
aa9a4ec7 | 1316 | |
07263f1e BF |
1317 | if (conn->cb_addr.ss_family == AF_INET6) |
1318 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 1319 | |
07263f1e BF |
1320 | conn->cb_prog = se->se_callback_prog; |
1321 | conn->cb_ident = se->se_callback_ident; | |
849a1cf1 | 1322 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
1da177e4 LT |
1323 | return; |
1324 | out_err: | |
07263f1e BF |
1325 | conn->cb_addr.ss_family = AF_UNSPEC; |
1326 | conn->cb_addrlen = 0; | |
849823c5 | 1327 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
1328 | "will not receive delegations\n", |
1329 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
1330 | ||
1da177e4 LT |
1331 | return; |
1332 | } | |
1333 | ||
074fe897 | 1334 | /* |
557ce264 | 1335 | * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. |
074fe897 | 1336 | */ |
074fe897 AA |
1337 | void |
1338 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) | |
074fe897 | 1339 | { |
557ce264 AA |
1340 | struct nfsd4_slot *slot = resp->cstate.slot; |
1341 | unsigned int base; | |
074fe897 | 1342 | |
557ce264 | 1343 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1344 | |
557ce264 AA |
1345 | slot->sl_opcnt = resp->opcnt; |
1346 | slot->sl_status = resp->cstate.status; | |
074fe897 | 1347 | |
bf864a31 | 1348 | if (nfsd4_not_cached(resp)) { |
557ce264 | 1349 | slot->sl_datalen = 0; |
bf864a31 | 1350 | return; |
074fe897 | 1351 | } |
557ce264 AA |
1352 | slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; |
1353 | base = (char *)resp->cstate.datap - | |
1354 | (char *)resp->xbuf->head[0].iov_base; | |
1355 | if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, | |
1356 | slot->sl_datalen)) | |
1357 | WARN("%s: sessions DRC could not cache compound\n", __func__); | |
1358 | return; | |
074fe897 AA |
1359 | } |
1360 | ||
1361 | /* | |
abfabf8c AA |
1362 | * Encode the replay sequence operation from the slot values. |
1363 | * If cachethis is FALSE encode the uncached rep error on the next | |
1364 | * operation which sets resp->p and increments resp->opcnt for | |
1365 | * nfs4svc_encode_compoundres. | |
074fe897 | 1366 | * |
074fe897 | 1367 | */ |
abfabf8c AA |
1368 | static __be32 |
1369 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
1370 | struct nfsd4_compoundres *resp) | |
074fe897 | 1371 | { |
abfabf8c AA |
1372 | struct nfsd4_op *op; |
1373 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 1374 | |
abfabf8c | 1375 | dprintk("--> %s resp->opcnt %d cachethis %u \n", __func__, |
557ce264 | 1376 | resp->opcnt, resp->cstate.slot->sl_cachethis); |
bf864a31 | 1377 | |
abfabf8c AA |
1378 | /* Encode the replayed sequence operation */ |
1379 | op = &args->ops[resp->opcnt - 1]; | |
1380 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 1381 | |
abfabf8c | 1382 | /* Return nfserr_retry_uncached_rep in next operation. */ |
557ce264 | 1383 | if (args->opcnt > 1 && slot->sl_cachethis == 0) { |
abfabf8c AA |
1384 | op = &args->ops[resp->opcnt++]; |
1385 | op->status = nfserr_retry_uncached_rep; | |
1386 | nfsd4_encode_operation(resp, op); | |
074fe897 | 1387 | } |
abfabf8c | 1388 | return op->status; |
074fe897 AA |
1389 | } |
1390 | ||
1391 | /* | |
557ce264 AA |
1392 | * The sequence operation is not cached because we can use the slot and |
1393 | * session values. | |
074fe897 AA |
1394 | */ |
1395 | __be32 | |
bf864a31 AA |
1396 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
1397 | struct nfsd4_sequence *seq) | |
074fe897 | 1398 | { |
557ce264 | 1399 | struct nfsd4_slot *slot = resp->cstate.slot; |
074fe897 AA |
1400 | __be32 status; |
1401 | ||
557ce264 | 1402 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1403 | |
abfabf8c AA |
1404 | /* Either returns 0 or nfserr_retry_uncached */ |
1405 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); | |
1406 | if (status == nfserr_retry_uncached_rep) | |
1407 | return status; | |
074fe897 | 1408 | |
557ce264 AA |
1409 | /* The sequence operation has been encoded, cstate->datap set. */ |
1410 | memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); | |
074fe897 | 1411 | |
557ce264 AA |
1412 | resp->opcnt = slot->sl_opcnt; |
1413 | resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); | |
1414 | status = slot->sl_status; | |
074fe897 AA |
1415 | |
1416 | return status; | |
1417 | } | |
1418 | ||
0733d213 AA |
1419 | /* |
1420 | * Set the exchange_id flags returned by the server. | |
1421 | */ | |
1422 | static void | |
1423 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
1424 | { | |
1425 | /* pNFS is not supported */ | |
1426 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
1427 | ||
1428 | /* Referrals are supported, Migration is not. */ | |
1429 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
1430 | ||
1431 | /* set the wire flags to return to client. */ | |
1432 | clid->flags = new->cl_exchange_flags; | |
1433 | } | |
1434 | ||
069b6ad4 AA |
1435 | __be32 |
1436 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
1437 | struct nfsd4_compound_state *cstate, | |
1438 | struct nfsd4_exchange_id *exid) | |
1439 | { | |
0733d213 AA |
1440 | struct nfs4_client *unconf, *conf, *new; |
1441 | int status; | |
1442 | unsigned int strhashval; | |
1443 | char dname[HEXDIR_LEN]; | |
363168b4 | 1444 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 1445 | nfs4_verifier verf = exid->verifier; |
363168b4 | 1446 | struct sockaddr *sa = svc_addr(rqstp); |
0733d213 | 1447 | |
363168b4 | 1448 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 1449 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 1450 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 1451 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 1452 | addr_str, exid->flags, exid->spa_how); |
0733d213 AA |
1453 | |
1454 | if (!check_name(exid->clname) || (exid->flags & ~EXCHGID4_FLAG_MASK_A)) | |
1455 | return nfserr_inval; | |
1456 | ||
1457 | /* Currently only support SP4_NONE */ | |
1458 | switch (exid->spa_how) { | |
1459 | case SP4_NONE: | |
1460 | break; | |
1461 | case SP4_SSV: | |
044bc1d4 | 1462 | return nfserr_serverfault; |
0733d213 AA |
1463 | default: |
1464 | BUG(); /* checked by xdr code */ | |
1465 | case SP4_MACH_CRED: | |
1466 | return nfserr_serverfault; /* no excuse :-/ */ | |
1467 | } | |
1468 | ||
1469 | status = nfs4_make_rec_clidname(dname, &exid->clname); | |
1470 | ||
1471 | if (status) | |
1472 | goto error; | |
1473 | ||
1474 | strhashval = clientstr_hashval(dname); | |
1475 | ||
1476 | nfs4_lock_state(); | |
1477 | status = nfs_ok; | |
1478 | ||
e203d506 | 1479 | conf = find_confirmed_client_by_str(dname, strhashval); |
0733d213 | 1480 | if (conf) { |
e203d506 BF |
1481 | if (!clp_used_exchangeid(conf)) { |
1482 | status = nfserr_clid_inuse; /* XXX: ? */ | |
1483 | goto out; | |
1484 | } | |
0733d213 AA |
1485 | if (!same_verf(&verf, &conf->cl_verifier)) { |
1486 | /* 18.35.4 case 8 */ | |
1487 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1488 | status = nfserr_not_same; | |
1489 | goto out; | |
1490 | } | |
1491 | /* Client reboot: destroy old state */ | |
1492 | expire_client(conf); | |
1493 | goto out_new; | |
1494 | } | |
1495 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { | |
1496 | /* 18.35.4 case 9 */ | |
1497 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1498 | status = nfserr_perm; | |
1499 | goto out; | |
1500 | } | |
1501 | expire_client(conf); | |
1502 | goto out_new; | |
1503 | } | |
0733d213 AA |
1504 | /* |
1505 | * Set bit when the owner id and verifier map to an already | |
1506 | * confirmed client id (18.35.3). | |
1507 | */ | |
1508 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
1509 | ||
1510 | /* | |
1511 | * Falling into 18.35.4 case 2, possible router replay. | |
1512 | * Leave confirmed record intact and return same result. | |
1513 | */ | |
1514 | copy_verf(conf, &verf); | |
1515 | new = conf; | |
1516 | goto out_copy; | |
6ddbbbfe MS |
1517 | } |
1518 | ||
1519 | /* 18.35.4 case 7 */ | |
1520 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1521 | status = nfserr_noent; | |
1522 | goto out; | |
0733d213 AA |
1523 | } |
1524 | ||
e203d506 | 1525 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
0733d213 AA |
1526 | if (unconf) { |
1527 | /* | |
1528 | * Possible retry or client restart. Per 18.35.4 case 4, | |
1529 | * a new unconfirmed record should be generated regardless | |
1530 | * of whether any properties have changed. | |
1531 | */ | |
1532 | expire_client(unconf); | |
1533 | } | |
1534 | ||
1535 | out_new: | |
1536 | /* Normal case */ | |
b09333c4 | 1537 | new = create_client(exid->clname, dname, rqstp, &verf); |
0733d213 | 1538 | if (new == NULL) { |
4731030d | 1539 | status = nfserr_jukebox; |
0733d213 AA |
1540 | goto out; |
1541 | } | |
1542 | ||
0733d213 | 1543 | gen_clid(new); |
0733d213 AA |
1544 | add_to_unconfirmed(new, strhashval); |
1545 | out_copy: | |
1546 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
1547 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
1548 | ||
38eb76a5 | 1549 | exid->seqid = 1; |
0733d213 AA |
1550 | nfsd4_set_ex_flags(new, exid); |
1551 | ||
1552 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
49557cc7 | 1553 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
1554 | status = nfs_ok; |
1555 | ||
1556 | out: | |
1557 | nfs4_unlock_state(); | |
1558 | error: | |
1559 | dprintk("nfsd4_exchange_id returns %d\n", ntohl(status)); | |
1560 | return status; | |
069b6ad4 AA |
1561 | } |
1562 | ||
b85d4c01 | 1563 | static int |
88e588d5 | 1564 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 1565 | { |
88e588d5 AA |
1566 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
1567 | slot_seqid); | |
b85d4c01 BH |
1568 | |
1569 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
1570 | if (slot_inuse) { |
1571 | if (seqid == slot_seqid) | |
b85d4c01 BH |
1572 | return nfserr_jukebox; |
1573 | else | |
1574 | return nfserr_seq_misordered; | |
1575 | } | |
1576 | /* Normal */ | |
88e588d5 | 1577 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 BH |
1578 | return nfs_ok; |
1579 | /* Replay */ | |
88e588d5 | 1580 | if (seqid == slot_seqid) |
b85d4c01 BH |
1581 | return nfserr_replay_cache; |
1582 | /* Wraparound */ | |
88e588d5 | 1583 | if (seqid == 1 && (slot_seqid + 1) == 0) |
b85d4c01 BH |
1584 | return nfs_ok; |
1585 | /* Misordered replay or misordered new request */ | |
1586 | return nfserr_seq_misordered; | |
1587 | } | |
1588 | ||
49557cc7 AA |
1589 | /* |
1590 | * Cache the create session result into the create session single DRC | |
1591 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
1592 | * Do this for solo or embedded create session operations. | |
1593 | */ | |
1594 | static void | |
1595 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
1596 | struct nfsd4_clid_slot *slot, int nfserr) | |
1597 | { | |
1598 | slot->sl_status = nfserr; | |
1599 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
1600 | } | |
1601 | ||
1602 | static __be32 | |
1603 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
1604 | struct nfsd4_clid_slot *slot) | |
1605 | { | |
1606 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
1607 | return slot->sl_status; | |
1608 | } | |
1609 | ||
1b74c25b MJ |
1610 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
1611 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
1612 | 1 + /* MIN tag is length with zero, only length */ \ | |
1613 | 3 + /* version, opcount, opcode */ \ | |
1614 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1615 | /* seqid, slotID, slotID, cache */ \ | |
1616 | 4 ) * sizeof(__be32)) | |
1617 | ||
1618 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
1619 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
1620 | 1 + /* status */ \ | |
1621 | 1 + /* MIN tag is length with zero, only length */ \ | |
1622 | 3 + /* opcount, opcode, opstatus*/ \ | |
1623 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1624 | /* seqid, slotID, slotID, slotID, status */ \ | |
1625 | 5 ) * sizeof(__be32)) | |
1626 | ||
1627 | static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs fchannel) | |
1628 | { | |
1629 | return fchannel.maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ | |
1630 | || fchannel.maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ; | |
1631 | } | |
1632 | ||
069b6ad4 AA |
1633 | __be32 |
1634 | nfsd4_create_session(struct svc_rqst *rqstp, | |
1635 | struct nfsd4_compound_state *cstate, | |
1636 | struct nfsd4_create_session *cr_ses) | |
1637 | { | |
363168b4 | 1638 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 1639 | struct nfs4_client *conf, *unconf; |
ac7c46f2 | 1640 | struct nfsd4_session *new; |
49557cc7 | 1641 | struct nfsd4_clid_slot *cs_slot = NULL; |
86c3e16c | 1642 | bool confirm_me = false; |
ec6b5d7b AA |
1643 | int status = 0; |
1644 | ||
a62573dc MJ |
1645 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
1646 | return nfserr_inval; | |
1647 | ||
ec6b5d7b AA |
1648 | nfs4_lock_state(); |
1649 | unconf = find_unconfirmed_client(&cr_ses->clientid); | |
1650 | conf = find_confirmed_client(&cr_ses->clientid); | |
1651 | ||
1652 | if (conf) { | |
49557cc7 AA |
1653 | cs_slot = &conf->cl_cs_slot; |
1654 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 1655 | if (status == nfserr_replay_cache) { |
ec6b5d7b | 1656 | dprintk("Got a create_session replay! seqid= %d\n", |
49557cc7 | 1657 | cs_slot->sl_seqid); |
38eb76a5 | 1658 | /* Return the cached reply status */ |
49557cc7 | 1659 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
38eb76a5 | 1660 | goto out; |
49557cc7 | 1661 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b AA |
1662 | status = nfserr_seq_misordered; |
1663 | dprintk("Sequence misordered!\n"); | |
1664 | dprintk("Expected seqid= %d but got seqid= %d\n", | |
49557cc7 | 1665 | cs_slot->sl_seqid, cr_ses->seqid); |
ec6b5d7b AA |
1666 | goto out; |
1667 | } | |
ec6b5d7b AA |
1668 | } else if (unconf) { |
1669 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || | |
363168b4 | 1670 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b AA |
1671 | status = nfserr_clid_inuse; |
1672 | goto out; | |
1673 | } | |
1674 | ||
49557cc7 AA |
1675 | cs_slot = &unconf->cl_cs_slot; |
1676 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
1677 | if (status) { |
1678 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 1679 | status = nfserr_seq_misordered; |
cd5b8144 | 1680 | goto out; |
ec6b5d7b AA |
1681 | } |
1682 | ||
86c3e16c | 1683 | confirm_me = true; |
ec6b5d7b AA |
1684 | conf = unconf; |
1685 | } else { | |
1686 | status = nfserr_stale_clientid; | |
1687 | goto out; | |
1688 | } | |
1689 | ||
8323c3b2 BF |
1690 | /* |
1691 | * XXX: we should probably set this at creation time, and check | |
1692 | * for consistent minorversion use throughout: | |
1693 | */ | |
1694 | conf->cl_minorversion = 1; | |
408b79bc BF |
1695 | /* |
1696 | * We do not support RDMA or persistent sessions | |
1697 | */ | |
1698 | cr_ses->flags &= ~SESSION4_PERSIST; | |
1699 | cr_ses->flags &= ~SESSION4_RDMA; | |
1700 | ||
1b74c25b MJ |
1701 | status = nfserr_toosmall; |
1702 | if (check_forechannel_attrs(cr_ses->fore_channel)) | |
1703 | goto out; | |
1704 | ||
ac7c46f2 BF |
1705 | status = nfserr_jukebox; |
1706 | new = alloc_init_session(rqstp, conf, cr_ses); | |
1707 | if (!new) | |
ec6b5d7b | 1708 | goto out; |
ac7c46f2 BF |
1709 | status = nfs_ok; |
1710 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, | |
ec6b5d7b | 1711 | NFS4_MAX_SESSIONID_LEN); |
12050657 MJ |
1712 | memcpy(&cr_ses->fore_channel, &new->se_fchannel, |
1713 | sizeof(struct nfsd4_channel_attrs)); | |
86c3e16c | 1714 | cs_slot->sl_seqid++; |
49557cc7 | 1715 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 1716 | |
49557cc7 AA |
1717 | /* cache solo and embedded create sessions under the state lock */ |
1718 | nfsd4_cache_create_session(cr_ses, cs_slot, status); | |
86c3e16c BF |
1719 | if (confirm_me) |
1720 | move_to_confirmed(conf); | |
ec6b5d7b AA |
1721 | out: |
1722 | nfs4_unlock_state(); | |
1723 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1724 | return status; | |
069b6ad4 AA |
1725 | } |
1726 | ||
57716355 BF |
1727 | static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) |
1728 | { | |
1729 | struct nfsd4_compoundres *resp = rqstp->rq_resp; | |
1730 | struct nfsd4_compoundargs *argp = rqstp->rq_argp; | |
1731 | ||
1732 | return argp->opcnt == resp->opcnt; | |
1733 | } | |
1734 | ||
1d1bc8f2 BF |
1735 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
1736 | { | |
1737 | switch (*dir) { | |
1738 | case NFS4_CDFC4_FORE: | |
1739 | case NFS4_CDFC4_BACK: | |
1740 | return nfs_ok; | |
1741 | case NFS4_CDFC4_FORE_OR_BOTH: | |
1742 | case NFS4_CDFC4_BACK_OR_BOTH: | |
1743 | *dir = NFS4_CDFC4_BOTH; | |
1744 | return nfs_ok; | |
1745 | }; | |
1746 | return nfserr_inval; | |
1747 | } | |
1748 | ||
1749 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, | |
1750 | struct nfsd4_compound_state *cstate, | |
1751 | struct nfsd4_bind_conn_to_session *bcts) | |
1752 | { | |
1753 | __be32 status; | |
1754 | ||
1755 | if (!nfsd4_last_compound_op(rqstp)) | |
1756 | return nfserr_not_only_op; | |
1757 | spin_lock(&client_lock); | |
1758 | cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid); | |
1759 | /* Sorta weird: we only need the refcnt'ing because new_conn acquires | |
1760 | * client_lock iself: */ | |
1761 | if (cstate->session) { | |
1762 | nfsd4_get_session(cstate->session); | |
1763 | atomic_inc(&cstate->session->se_client->cl_refcount); | |
1764 | } | |
1765 | spin_unlock(&client_lock); | |
1766 | if (!cstate->session) | |
1767 | return nfserr_badsession; | |
1768 | ||
1769 | status = nfsd4_map_bcts_dir(&bcts->dir); | |
1db2b9dd BS |
1770 | if (!status) |
1771 | nfsd4_new_conn(rqstp, cstate->session, bcts->dir); | |
1772 | return status; | |
1d1bc8f2 BF |
1773 | } |
1774 | ||
5d4cec2f BF |
1775 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
1776 | { | |
1777 | if (!session) | |
1778 | return 0; | |
1779 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
1780 | } | |
1781 | ||
069b6ad4 AA |
1782 | __be32 |
1783 | nfsd4_destroy_session(struct svc_rqst *r, | |
1784 | struct nfsd4_compound_state *cstate, | |
1785 | struct nfsd4_destroy_session *sessionid) | |
1786 | { | |
e10e0cfc BH |
1787 | struct nfsd4_session *ses; |
1788 | u32 status = nfserr_badsession; | |
1789 | ||
1790 | /* Notes: | |
1791 | * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid | |
1792 | * - Should we return nfserr_back_chan_busy if waiting for | |
1793 | * callbacks on to-be-destroyed session? | |
1794 | * - Do we need to clear any callback info from previous session? | |
1795 | */ | |
1796 | ||
5d4cec2f | 1797 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 BF |
1798 | if (!nfsd4_last_compound_op(r)) |
1799 | return nfserr_not_only_op; | |
1800 | } | |
e10e0cfc | 1801 | dump_sessionid(__func__, &sessionid->sessionid); |
9089f1b4 | 1802 | spin_lock(&client_lock); |
e10e0cfc BH |
1803 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid); |
1804 | if (!ses) { | |
9089f1b4 | 1805 | spin_unlock(&client_lock); |
e10e0cfc BH |
1806 | goto out; |
1807 | } | |
1808 | ||
1809 | unhash_session(ses); | |
9089f1b4 | 1810 | spin_unlock(&client_lock); |
e10e0cfc | 1811 | |
ab707e15 | 1812 | nfs4_lock_state(); |
84f5f7cc | 1813 | nfsd4_probe_callback_sync(ses->se_client); |
ab707e15 | 1814 | nfs4_unlock_state(); |
19cf5c02 BF |
1815 | |
1816 | nfsd4_del_conns(ses); | |
1817 | ||
e10e0cfc BH |
1818 | nfsd4_put_session(ses); |
1819 | status = nfs_ok; | |
1820 | out: | |
1821 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1822 | return status; | |
069b6ad4 AA |
1823 | } |
1824 | ||
a663bdd8 | 1825 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
1826 | { |
1827 | struct nfsd4_conn *c; | |
1828 | ||
1829 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 1830 | if (c->cn_xprt == xpt) { |
328ead28 BF |
1831 | return c; |
1832 | } | |
1833 | } | |
1834 | return NULL; | |
1835 | } | |
1836 | ||
a663bdd8 | 1837 | static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
1838 | { |
1839 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 1840 | struct nfsd4_conn *c; |
21b75b01 | 1841 | int ret; |
328ead28 BF |
1842 | |
1843 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 1844 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
328ead28 BF |
1845 | if (c) { |
1846 | spin_unlock(&clp->cl_lock); | |
1847 | free_conn(new); | |
1848 | return; | |
1849 | } | |
1850 | __nfsd4_hash_conn(new, ses); | |
1851 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
1852 | ret = nfsd4_register_conn(new); |
1853 | if (ret) | |
1854 | /* oops; xprt is already down: */ | |
1855 | nfsd4_conn_lost(&new->cn_xpt_user); | |
328ead28 BF |
1856 | return; |
1857 | } | |
1858 | ||
868b89c3 MJ |
1859 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
1860 | { | |
1861 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
1862 | ||
1863 | return args->opcnt > session->se_fchannel.maxops; | |
1864 | } | |
1865 | ||
ae82a8d0 MJ |
1866 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
1867 | struct nfsd4_session *session) | |
1868 | { | |
1869 | struct xdr_buf *xb = &rqstp->rq_arg; | |
1870 | ||
1871 | return xb->len > session->se_fchannel.maxreq_sz; | |
1872 | } | |
1873 | ||
069b6ad4 | 1874 | __be32 |
b85d4c01 | 1875 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
1876 | struct nfsd4_compound_state *cstate, |
1877 | struct nfsd4_sequence *seq) | |
1878 | { | |
f9bb94c4 | 1879 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
b85d4c01 BH |
1880 | struct nfsd4_session *session; |
1881 | struct nfsd4_slot *slot; | |
a663bdd8 | 1882 | struct nfsd4_conn *conn; |
b85d4c01 BH |
1883 | int status; |
1884 | ||
f9bb94c4 AA |
1885 | if (resp->opcnt != 1) |
1886 | return nfserr_sequence_pos; | |
1887 | ||
a663bdd8 BF |
1888 | /* |
1889 | * Will be either used or freed by nfsd4_sequence_check_conn | |
1890 | * below. | |
1891 | */ | |
1892 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
1893 | if (!conn) | |
1894 | return nfserr_jukebox; | |
1895 | ||
9089f1b4 | 1896 | spin_lock(&client_lock); |
b85d4c01 BH |
1897 | status = nfserr_badsession; |
1898 | session = find_in_sessionid_hashtbl(&seq->sessionid); | |
1899 | if (!session) | |
1900 | goto out; | |
1901 | ||
868b89c3 MJ |
1902 | status = nfserr_too_many_ops; |
1903 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
1904 | goto out; | |
1905 | ||
ae82a8d0 MJ |
1906 | status = nfserr_req_too_big; |
1907 | if (nfsd4_request_too_big(rqstp, session)) | |
1908 | goto out; | |
1909 | ||
b85d4c01 | 1910 | status = nfserr_badslot; |
6c18ba9f | 1911 | if (seq->slotid >= session->se_fchannel.maxreqs) |
b85d4c01 BH |
1912 | goto out; |
1913 | ||
557ce264 | 1914 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
1915 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
1916 | ||
a8dfdaeb AA |
1917 | /* We do not negotiate the number of slots yet, so set the |
1918 | * maxslots to the session maxreqs which is used to encode | |
1919 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
1920 | seq->maxslots = session->se_fchannel.maxreqs; | |
1921 | ||
88e588d5 | 1922 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, slot->sl_inuse); |
b85d4c01 BH |
1923 | if (status == nfserr_replay_cache) { |
1924 | cstate->slot = slot; | |
1925 | cstate->session = session; | |
da3846a2 | 1926 | /* Return the cached reply status and set cstate->status |
557ce264 | 1927 | * for nfsd4_proc_compound processing */ |
bf864a31 | 1928 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 1929 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 1930 | goto out; |
b85d4c01 BH |
1931 | } |
1932 | if (status) | |
1933 | goto out; | |
1934 | ||
a663bdd8 BF |
1935 | nfsd4_sequence_check_conn(conn, session); |
1936 | conn = NULL; | |
328ead28 | 1937 | |
b85d4c01 BH |
1938 | /* Success! bump slot seqid */ |
1939 | slot->sl_inuse = true; | |
1940 | slot->sl_seqid = seq->seqid; | |
557ce264 | 1941 | slot->sl_cachethis = seq->cachethis; |
b85d4c01 BH |
1942 | |
1943 | cstate->slot = slot; | |
1944 | cstate->session = session; | |
1945 | ||
b85d4c01 | 1946 | out: |
26c0c75e | 1947 | /* Hold a session reference until done processing the compound. */ |
aaf84eb9 | 1948 | if (cstate->session) { |
0d7bb719 BF |
1949 | struct nfs4_client *clp = session->se_client; |
1950 | ||
36acb66b | 1951 | nfsd4_get_session(cstate->session); |
0d7bb719 BF |
1952 | atomic_inc(&clp->cl_refcount); |
1953 | if (clp->cl_cb_state == NFSD4_CB_DOWN) | |
1954 | seq->status_flags |= SEQ4_STATUS_CB_PATH_DOWN; | |
aaf84eb9 | 1955 | } |
a663bdd8 | 1956 | kfree(conn); |
36acb66b | 1957 | spin_unlock(&client_lock); |
b85d4c01 BH |
1958 | dprintk("%s: return %d\n", __func__, ntohl(status)); |
1959 | return status; | |
069b6ad4 AA |
1960 | } |
1961 | ||
4dc6ec00 BF |
1962 | __be32 |
1963 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
1964 | { | |
bcecf1cc MJ |
1965 | int status = 0; |
1966 | ||
4dc6ec00 BF |
1967 | if (rc->rca_one_fs) { |
1968 | if (!cstate->current_fh.fh_dentry) | |
1969 | return nfserr_nofilehandle; | |
1970 | /* | |
1971 | * We don't take advantage of the rca_one_fs case. | |
1972 | * That's OK, it's optional, we can safely ignore it. | |
1973 | */ | |
1974 | return nfs_ok; | |
1975 | } | |
bcecf1cc | 1976 | |
4dc6ec00 | 1977 | nfs4_lock_state(); |
bcecf1cc MJ |
1978 | status = nfserr_complete_already; |
1979 | if (cstate->session->se_client->cl_firststate) | |
1980 | goto out; | |
1981 | ||
1982 | status = nfserr_stale_clientid; | |
1983 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
1984 | /* |
1985 | * The following error isn't really legal. | |
1986 | * But we only get here if the client just explicitly | |
1987 | * destroyed the client. Surely it no longer cares what | |
1988 | * error it gets back on an operation for the dead | |
1989 | * client. | |
1990 | */ | |
bcecf1cc MJ |
1991 | goto out; |
1992 | ||
1993 | status = nfs_ok; | |
4dc6ec00 | 1994 | nfsd4_create_clid_dir(cstate->session->se_client); |
bcecf1cc | 1995 | out: |
4dc6ec00 | 1996 | nfs4_unlock_state(); |
bcecf1cc | 1997 | return status; |
4dc6ec00 BF |
1998 | } |
1999 | ||
b37ad28b | 2000 | __be32 |
b591480b BF |
2001 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2002 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 2003 | { |
1da177e4 LT |
2004 | struct xdr_netobj clname = { |
2005 | .len = setclid->se_namelen, | |
2006 | .data = setclid->se_name, | |
2007 | }; | |
2008 | nfs4_verifier clverifier = setclid->se_verf; | |
2009 | unsigned int strhashval; | |
28ce6054 | 2010 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 2011 | __be32 status; |
a55370a3 | 2012 | char dname[HEXDIR_LEN]; |
1da177e4 | 2013 | |
1da177e4 | 2014 | if (!check_name(clname)) |
73aea4ec | 2015 | return nfserr_inval; |
1da177e4 | 2016 | |
a55370a3 N |
2017 | status = nfs4_make_rec_clidname(dname, &clname); |
2018 | if (status) | |
73aea4ec | 2019 | return status; |
a55370a3 | 2020 | |
1da177e4 LT |
2021 | /* |
2022 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
2023 | * We get here on a DRC miss. | |
2024 | */ | |
2025 | ||
a55370a3 | 2026 | strhashval = clientstr_hashval(dname); |
1da177e4 | 2027 | |
1da177e4 | 2028 | nfs4_lock_state(); |
e203d506 | 2029 | conf = find_confirmed_client_by_str(dname, strhashval); |
28ce6054 | 2030 | if (conf) { |
a186e767 | 2031 | /* RFC 3530 14.2.33 CASE 0: */ |
1da177e4 | 2032 | status = nfserr_clid_inuse; |
e203d506 BF |
2033 | if (clp_used_exchangeid(conf)) |
2034 | goto out; | |
026722c2 | 2035 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
2036 | char addr_str[INET6_ADDRSTRLEN]; |
2037 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
2038 | sizeof(addr_str)); | |
2039 | dprintk("NFSD: setclientid: string in use by client " | |
2040 | "at %s\n", addr_str); | |
1da177e4 LT |
2041 | goto out; |
2042 | } | |
1da177e4 | 2043 | } |
a186e767 BF |
2044 | /* |
2045 | * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") | |
2046 | * has a description of SETCLIENTID request processing consisting | |
2047 | * of 5 bullet points, labeled as CASE0 - CASE4 below. | |
2048 | */ | |
e203d506 | 2049 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
3e772463 | 2050 | status = nfserr_jukebox; |
1da177e4 | 2051 | if (!conf) { |
a186e767 BF |
2052 | /* |
2053 | * RFC 3530 14.2.33 CASE 4: | |
2054 | * placed first, because it is the normal case | |
1da177e4 LT |
2055 | */ |
2056 | if (unconf) | |
2057 | expire_client(unconf); | |
b09333c4 | 2058 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 2059 | if (new == NULL) |
1da177e4 | 2060 | goto out; |
1da177e4 | 2061 | gen_clid(new); |
599e0a22 | 2062 | } else if (same_verf(&conf->cl_verifier, &clverifier)) { |
1da177e4 | 2063 | /* |
a186e767 BF |
2064 | * RFC 3530 14.2.33 CASE 1: |
2065 | * probable callback update | |
1da177e4 | 2066 | */ |
31f4a6c1 N |
2067 | if (unconf) { |
2068 | /* Note this is removing unconfirmed {*x***}, | |
2069 | * which is stronger than RFC recommended {vxc**}. | |
2070 | * This has the advantage that there is at most | |
2071 | * one {*x***} in either list at any time. | |
2072 | */ | |
2073 | expire_client(unconf); | |
1da177e4 | 2074 | } |
b09333c4 | 2075 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 2076 | if (new == NULL) |
1da177e4 | 2077 | goto out; |
1da177e4 | 2078 | copy_clid(new, conf); |
1da177e4 LT |
2079 | } else if (!unconf) { |
2080 | /* | |
a186e767 BF |
2081 | * RFC 3530 14.2.33 CASE 2: |
2082 | * probable client reboot; state will be removed if | |
2083 | * confirmed. | |
1da177e4 | 2084 | */ |
b09333c4 | 2085 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 2086 | if (new == NULL) |
1da177e4 | 2087 | goto out; |
1da177e4 | 2088 | gen_clid(new); |
49ba8781 | 2089 | } else { |
a186e767 BF |
2090 | /* |
2091 | * RFC 3530 14.2.33 CASE 3: | |
2092 | * probable client reboot; state will be removed if | |
2093 | * confirmed. | |
1da177e4 LT |
2094 | */ |
2095 | expire_client(unconf); | |
b09333c4 | 2096 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 2097 | if (new == NULL) |
1da177e4 | 2098 | goto out; |
1da177e4 | 2099 | gen_clid(new); |
1da177e4 | 2100 | } |
8323c3b2 BF |
2101 | /* |
2102 | * XXX: we should probably set this at creation time, and check | |
2103 | * for consistent minorversion use throughout: | |
2104 | */ | |
2105 | new->cl_minorversion = 0; | |
6f3d772f | 2106 | gen_callback(new, setclid, rqstp); |
c175b83c | 2107 | add_to_unconfirmed(new, strhashval); |
1da177e4 LT |
2108 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
2109 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
2110 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
2111 | status = nfs_ok; | |
2112 | out: | |
2113 | nfs4_unlock_state(); | |
2114 | return status; | |
2115 | } | |
2116 | ||
2117 | ||
2118 | /* | |
a186e767 BF |
2119 | * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has |
2120 | * a description of SETCLIENTID_CONFIRM request processing consisting of 4 | |
2121 | * bullets, labeled as CASE1 - CASE4 below. | |
1da177e4 | 2122 | */ |
b37ad28b | 2123 | __be32 |
b591480b BF |
2124 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
2125 | struct nfsd4_compound_state *cstate, | |
2126 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 2127 | { |
363168b4 | 2128 | struct sockaddr *sa = svc_addr(rqstp); |
21ab45a4 | 2129 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
2130 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
2131 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 2132 | __be32 status; |
1da177e4 LT |
2133 | |
2134 | if (STALE_CLIENTID(clid)) | |
2135 | return nfserr_stale_clientid; | |
2136 | /* | |
2137 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
2138 | * We get here on a DRC miss. | |
2139 | */ | |
2140 | ||
2141 | nfs4_lock_state(); | |
21ab45a4 N |
2142 | |
2143 | conf = find_confirmed_client(clid); | |
2144 | unconf = find_unconfirmed_client(clid); | |
2145 | ||
2146 | status = nfserr_clid_inuse; | |
363168b4 | 2147 | if (conf && !rpc_cmp_addr((struct sockaddr *) &conf->cl_addr, sa)) |
21ab45a4 | 2148 | goto out; |
363168b4 | 2149 | if (unconf && !rpc_cmp_addr((struct sockaddr *) &unconf->cl_addr, sa)) |
21ab45a4 N |
2150 | goto out; |
2151 | ||
a186e767 BF |
2152 | /* |
2153 | * section 14.2.34 of RFC 3530 has a description of | |
2154 | * SETCLIENTID_CONFIRM request processing consisting | |
2155 | * of 4 bullet points, labeled as CASE1 - CASE4 below. | |
2156 | */ | |
366e0c1d | 2157 | if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { |
a186e767 BF |
2158 | /* |
2159 | * RFC 3530 14.2.34 CASE 1: | |
2160 | * callback update | |
2161 | */ | |
599e0a22 | 2162 | if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) |
1da177e4 LT |
2163 | status = nfserr_clid_inuse; |
2164 | else { | |
5a3c9d71 BF |
2165 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
2166 | nfsd4_probe_callback(conf); | |
1a69c179 | 2167 | expire_client(unconf); |
1da177e4 | 2168 | status = nfs_ok; |
1a69c179 | 2169 | |
1da177e4 | 2170 | } |
f3aba4e5 | 2171 | } else if (conf && !unconf) { |
a186e767 BF |
2172 | /* |
2173 | * RFC 3530 14.2.34 CASE 2: | |
2174 | * probable retransmitted request; play it safe and | |
2175 | * do nothing. | |
7c79f737 | 2176 | */ |
599e0a22 | 2177 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) |
1da177e4 | 2178 | status = nfserr_clid_inuse; |
21ab45a4 | 2179 | else |
1da177e4 | 2180 | status = nfs_ok; |
7c79f737 | 2181 | } else if (!conf && unconf |
599e0a22 | 2182 | && same_verf(&unconf->cl_confirm, &confirm)) { |
a186e767 BF |
2183 | /* |
2184 | * RFC 3530 14.2.34 CASE 3: | |
2185 | * Normal case; new or rebooted client: | |
7c79f737 | 2186 | */ |
599e0a22 | 2187 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { |
1da177e4 LT |
2188 | status = nfserr_clid_inuse; |
2189 | } else { | |
1a69c179 N |
2190 | unsigned int hash = |
2191 | clientstr_hashval(unconf->cl_recdir); | |
2192 | conf = find_confirmed_client_by_str(unconf->cl_recdir, | |
e203d506 | 2193 | hash); |
1a69c179 | 2194 | if (conf) { |
c7b9a459 | 2195 | nfsd4_remove_clid_dir(conf); |
1a69c179 N |
2196 | expire_client(conf); |
2197 | } | |
1da177e4 | 2198 | move_to_confirmed(unconf); |
21ab45a4 | 2199 | conf = unconf; |
5a3c9d71 | 2200 | nfsd4_probe_callback(conf); |
1a69c179 | 2201 | status = nfs_ok; |
1da177e4 | 2202 | } |
599e0a22 BF |
2203 | } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) |
2204 | && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, | |
7c79f737 | 2205 | &confirm)))) { |
a186e767 BF |
2206 | /* |
2207 | * RFC 3530 14.2.34 CASE 4: | |
2208 | * Client probably hasn't noticed that we rebooted yet. | |
7c79f737 | 2209 | */ |
1da177e4 | 2210 | status = nfserr_stale_clientid; |
7c79f737 | 2211 | } else { |
08e8987c N |
2212 | /* check that we have hit one of the cases...*/ |
2213 | status = nfserr_clid_inuse; | |
2214 | } | |
1da177e4 | 2215 | out: |
1da177e4 LT |
2216 | nfs4_unlock_state(); |
2217 | return status; | |
2218 | } | |
2219 | ||
1da177e4 LT |
2220 | /* OPEN Share state helper functions */ |
2221 | static inline struct nfs4_file * | |
2222 | alloc_init_file(struct inode *ino) | |
2223 | { | |
2224 | struct nfs4_file *fp; | |
2225 | unsigned int hashval = file_hashval(ino); | |
2226 | ||
e60d4398 N |
2227 | fp = kmem_cache_alloc(file_slab, GFP_KERNEL); |
2228 | if (fp) { | |
8b671b80 | 2229 | atomic_set(&fp->fi_ref, 1); |
1da177e4 | 2230 | INIT_LIST_HEAD(&fp->fi_hash); |
8beefa24 N |
2231 | INIT_LIST_HEAD(&fp->fi_stateids); |
2232 | INIT_LIST_HEAD(&fp->fi_delegations); | |
1da177e4 | 2233 | fp->fi_inode = igrab(ino); |
47f9940c | 2234 | fp->fi_had_conflict = false; |
acfdf5c3 | 2235 | fp->fi_lease = NULL; |
f9d7562f BF |
2236 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); |
2237 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
47cee541 PE |
2238 | spin_lock(&recall_lock); |
2239 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); | |
2240 | spin_unlock(&recall_lock); | |
1da177e4 LT |
2241 | return fp; |
2242 | } | |
2243 | return NULL; | |
2244 | } | |
2245 | ||
e60d4398 | 2246 | static void |
e18b890b | 2247 | nfsd4_free_slab(struct kmem_cache **slab) |
1da177e4 | 2248 | { |
e60d4398 N |
2249 | if (*slab == NULL) |
2250 | return; | |
1a1d92c1 | 2251 | kmem_cache_destroy(*slab); |
e60d4398 | 2252 | *slab = NULL; |
1da177e4 LT |
2253 | } |
2254 | ||
e8ff2a84 | 2255 | void |
1da177e4 LT |
2256 | nfsd4_free_slabs(void) |
2257 | { | |
fe0750e5 BF |
2258 | nfsd4_free_slab(&openowner_slab); |
2259 | nfsd4_free_slab(&lockowner_slab); | |
e60d4398 | 2260 | nfsd4_free_slab(&file_slab); |
5ac049ac | 2261 | nfsd4_free_slab(&stateid_slab); |
5b2d21c1 | 2262 | nfsd4_free_slab(&deleg_slab); |
e60d4398 | 2263 | } |
1da177e4 | 2264 | |
e60d4398 N |
2265 | static int |
2266 | nfsd4_init_slabs(void) | |
2267 | { | |
fe0750e5 BF |
2268 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
2269 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2270 | if (openowner_slab == NULL) | |
2271 | goto out_nomem; | |
2272 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", | |
2273 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2274 | if (lockowner_slab == NULL) | |
e60d4398 N |
2275 | goto out_nomem; |
2276 | file_slab = kmem_cache_create("nfsd4_files", | |
20c2df83 | 2277 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 N |
2278 | if (file_slab == NULL) |
2279 | goto out_nomem; | |
5ac049ac | 2280 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
dcef0413 | 2281 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
5ac049ac N |
2282 | if (stateid_slab == NULL) |
2283 | goto out_nomem; | |
5b2d21c1 | 2284 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 2285 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 N |
2286 | if (deleg_slab == NULL) |
2287 | goto out_nomem; | |
e60d4398 N |
2288 | return 0; |
2289 | out_nomem: | |
2290 | nfsd4_free_slabs(); | |
2291 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | |
2292 | return -ENOMEM; | |
1da177e4 LT |
2293 | } |
2294 | ||
fe0750e5 BF |
2295 | void nfs4_free_openowner(struct nfs4_openowner *oo) |
2296 | { | |
2297 | kfree(oo->oo_owner.so_owner.data); | |
2298 | kmem_cache_free(openowner_slab, oo); | |
2299 | } | |
2300 | ||
2301 | void nfs4_free_lockowner(struct nfs4_lockowner *lo) | |
1da177e4 | 2302 | { |
fe0750e5 BF |
2303 | kfree(lo->lo_owner.so_owner.data); |
2304 | kmem_cache_free(lockowner_slab, lo); | |
1da177e4 LT |
2305 | } |
2306 | ||
ff194bd9 | 2307 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 2308 | { |
ff194bd9 BF |
2309 | rp->rp_status = nfserr_serverfault; |
2310 | rp->rp_buflen = 0; | |
2311 | rp->rp_buf = rp->rp_ibuf; | |
1da177e4 LT |
2312 | } |
2313 | ||
fe0750e5 | 2314 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 2315 | { |
1da177e4 | 2316 | struct nfs4_stateowner *sop; |
1da177e4 | 2317 | |
fe0750e5 | 2318 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
2319 | if (!sop) |
2320 | return NULL; | |
2321 | ||
2322 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); | |
2323 | if (!sop->so_owner.data) { | |
fe0750e5 | 2324 | kmem_cache_free(slab, sop); |
1da177e4 | 2325 | return NULL; |
ff194bd9 BF |
2326 | } |
2327 | sop->so_owner.len = owner->len; | |
2328 | ||
ea1da636 | 2329 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 BF |
2330 | sop->so_client = clp; |
2331 | init_nfs4_replay(&sop->so_replay); | |
2332 | return sop; | |
2333 | } | |
2334 | ||
fe0750e5 | 2335 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 | 2336 | { |
fe0750e5 BF |
2337 | list_add(&oo->oo_owner.so_strhash, &open_ownerstr_hashtbl[strhashval]); |
2338 | list_add(&oo->oo_perclient, &clp->cl_openowners); | |
ff194bd9 BF |
2339 | } |
2340 | ||
fe0750e5 | 2341 | static struct nfs4_openowner * |
ff194bd9 | 2342 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { |
fe0750e5 | 2343 | struct nfs4_openowner *oo; |
ff194bd9 | 2344 | |
fe0750e5 BF |
2345 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
2346 | if (!oo) | |
ff194bd9 | 2347 | return NULL; |
fe0750e5 BF |
2348 | oo->oo_owner.so_is_open_owner = 1; |
2349 | oo->oo_owner.so_seqid = open->op_seqid; | |
dad1c067 | 2350 | oo->oo_flags = 0; |
fe0750e5 | 2351 | oo->oo_time = 0; |
38c387b5 | 2352 | oo->oo_last_closed_stid = NULL; |
fe0750e5 BF |
2353 | INIT_LIST_HEAD(&oo->oo_close_lru); |
2354 | hash_openowner(oo, clp, strhashval); | |
2355 | return oo; | |
1da177e4 LT |
2356 | } |
2357 | ||
6136d2b4 | 2358 | static inline __be32 init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { |
fe0750e5 | 2359 | struct nfs4_openowner *oo = open->op_openowner; |
d3b313a4 | 2360 | struct nfs4_client *clp = oo->oo_owner.so_client; |
6136d2b4 | 2361 | __be32 status; |
1da177e4 | 2362 | |
6136d2b4 BF |
2363 | status = init_stid(&stp->st_stid, clp, NFS4_OPEN_STID); |
2364 | if (status) | |
2365 | return status; | |
ea1da636 | 2366 | INIT_LIST_HEAD(&stp->st_lockowners); |
fe0750e5 | 2367 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); |
8beefa24 | 2368 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 | 2369 | stp->st_stateowner = &oo->oo_owner; |
13cd2184 | 2370 | get_nfs4_file(fp); |
1da177e4 | 2371 | stp->st_file = fp; |
1da177e4 LT |
2372 | stp->st_access_bmap = 0; |
2373 | stp->st_deny_bmap = 0; | |
84459a11 AA |
2374 | __set_bit(open->op_share_access & ~NFS4_SHARE_WANT_MASK, |
2375 | &stp->st_access_bmap); | |
1da177e4 | 2376 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
4c4cd222 | 2377 | stp->st_openstp = NULL; |
6136d2b4 | 2378 | return nfs_ok; |
1da177e4 LT |
2379 | } |
2380 | ||
fd39ca9a | 2381 | static void |
fe0750e5 | 2382 | move_to_close_lru(struct nfs4_openowner *oo) |
1da177e4 | 2383 | { |
fe0750e5 | 2384 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 2385 | |
fe0750e5 BF |
2386 | list_move_tail(&oo->oo_close_lru, &close_lru); |
2387 | oo->oo_time = get_seconds(); | |
1da177e4 LT |
2388 | } |
2389 | ||
1da177e4 | 2390 | static int |
599e0a22 BF |
2391 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
2392 | clientid_t *clid) | |
2393 | { | |
2394 | return (sop->so_owner.len == owner->len) && | |
2395 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
2396 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
2397 | } |
2398 | ||
fe0750e5 | 2399 | static struct nfs4_openowner * |
1da177e4 LT |
2400 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) |
2401 | { | |
2402 | struct nfs4_stateowner *so = NULL; | |
2403 | ||
506f275f | 2404 | list_for_each_entry(so, &open_ownerstr_hashtbl[hashval], so_strhash) { |
599e0a22 | 2405 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) |
fe0750e5 | 2406 | return container_of(so, struct nfs4_openowner, oo_owner); |
1da177e4 LT |
2407 | } |
2408 | return NULL; | |
2409 | } | |
2410 | ||
2411 | /* search file_hashtbl[] for file */ | |
2412 | static struct nfs4_file * | |
2413 | find_file(struct inode *ino) | |
2414 | { | |
2415 | unsigned int hashval = file_hashval(ino); | |
2416 | struct nfs4_file *fp; | |
2417 | ||
8b671b80 | 2418 | spin_lock(&recall_lock); |
1da177e4 | 2419 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
13cd2184 N |
2420 | if (fp->fi_inode == ino) { |
2421 | get_nfs4_file(fp); | |
8b671b80 | 2422 | spin_unlock(&recall_lock); |
1da177e4 | 2423 | return fp; |
13cd2184 | 2424 | } |
1da177e4 | 2425 | } |
8b671b80 | 2426 | spin_unlock(&recall_lock); |
1da177e4 LT |
2427 | return NULL; |
2428 | } | |
2429 | ||
d87a8ade | 2430 | static inline int access_valid(u32 x, u32 minorversion) |
ba5a6a19 | 2431 | { |
d87a8ade | 2432 | if ((x & NFS4_SHARE_ACCESS_MASK) < NFS4_SHARE_ACCESS_READ) |
8838dc43 | 2433 | return 0; |
d87a8ade AA |
2434 | if ((x & NFS4_SHARE_ACCESS_MASK) > NFS4_SHARE_ACCESS_BOTH) |
2435 | return 0; | |
2436 | x &= ~NFS4_SHARE_ACCESS_MASK; | |
2437 | if (minorversion && x) { | |
2438 | if ((x & NFS4_SHARE_WANT_MASK) > NFS4_SHARE_WANT_CANCEL) | |
2439 | return 0; | |
2440 | if ((x & NFS4_SHARE_WHEN_MASK) > NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED) | |
2441 | return 0; | |
2442 | x &= ~(NFS4_SHARE_WANT_MASK | NFS4_SHARE_WHEN_MASK); | |
2443 | } | |
2444 | if (x) | |
8838dc43 BF |
2445 | return 0; |
2446 | return 1; | |
ba5a6a19 BF |
2447 | } |
2448 | ||
8838dc43 | 2449 | static inline int deny_valid(u32 x) |
ba5a6a19 | 2450 | { |
8838dc43 BF |
2451 | /* Note: unlike access bits, deny bits may be zero. */ |
2452 | return x <= NFS4_SHARE_DENY_BOTH; | |
ba5a6a19 | 2453 | } |
1da177e4 | 2454 | |
1da177e4 LT |
2455 | /* |
2456 | * Called to check deny when READ with all zero stateid or | |
2457 | * WRITE with all zero or all one stateid | |
2458 | */ | |
b37ad28b | 2459 | static __be32 |
1da177e4 LT |
2460 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
2461 | { | |
2462 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2463 | struct nfs4_file *fp; | |
dcef0413 | 2464 | struct nfs4_ol_stateid *stp; |
b37ad28b | 2465 | __be32 ret; |
1da177e4 LT |
2466 | |
2467 | dprintk("NFSD: nfs4_share_conflict\n"); | |
2468 | ||
2469 | fp = find_file(ino); | |
13cd2184 N |
2470 | if (!fp) |
2471 | return nfs_ok; | |
b700949b | 2472 | ret = nfserr_locked; |
1da177e4 | 2473 | /* Search for conflicting share reservations */ |
13cd2184 N |
2474 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
2475 | if (test_bit(deny_type, &stp->st_deny_bmap) || | |
2476 | test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) | |
2477 | goto out; | |
1da177e4 | 2478 | } |
13cd2184 N |
2479 | ret = nfs_ok; |
2480 | out: | |
2481 | put_nfs4_file(fp); | |
2482 | return ret; | |
1da177e4 LT |
2483 | } |
2484 | ||
6b57d9c8 | 2485 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
1da177e4 | 2486 | { |
1da177e4 LT |
2487 | /* We're assuming the state code never drops its reference |
2488 | * without first removing the lease. Since we're in this lease | |
2489 | * callback (and since the lease code is serialized by the kernel | |
2490 | * lock) we know the server hasn't removed the lease yet, we know | |
2491 | * it's safe to take a reference: */ | |
2492 | atomic_inc(&dp->dl_count); | |
2493 | ||
1da177e4 | 2494 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); |
1da177e4 | 2495 | |
460781b5 | 2496 | /* only place dl_time is set. protected by lock_flocks*/ |
1da177e4 LT |
2497 | dp->dl_time = get_seconds(); |
2498 | ||
6b57d9c8 BF |
2499 | nfsd4_cb_recall(dp); |
2500 | } | |
2501 | ||
acfdf5c3 | 2502 | /* Called from break_lease() with lock_flocks() held. */ |
6b57d9c8 BF |
2503 | static void nfsd_break_deleg_cb(struct file_lock *fl) |
2504 | { | |
acfdf5c3 BF |
2505 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
2506 | struct nfs4_delegation *dp; | |
6b57d9c8 | 2507 | |
acfdf5c3 BF |
2508 | BUG_ON(!fp); |
2509 | /* We assume break_lease is only called once per lease: */ | |
2510 | BUG_ON(fp->fi_had_conflict); | |
0272e1fd BF |
2511 | /* |
2512 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 2513 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 2514 | * in time: |
0272e1fd BF |
2515 | */ |
2516 | fl->fl_break_time = 0; | |
1da177e4 | 2517 | |
5d926e8c | 2518 | spin_lock(&recall_lock); |
acfdf5c3 BF |
2519 | fp->fi_had_conflict = true; |
2520 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
2521 | nfsd_break_one_deleg(dp); | |
5d926e8c | 2522 | spin_unlock(&recall_lock); |
1da177e4 LT |
2523 | } |
2524 | ||
1da177e4 LT |
2525 | static |
2526 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
2527 | { | |
2528 | if (arg & F_UNLCK) | |
2529 | return lease_modify(onlist, arg); | |
2530 | else | |
2531 | return -EAGAIN; | |
2532 | } | |
2533 | ||
7b021967 | 2534 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
2535 | .lm_break = nfsd_break_deleg_cb, |
2536 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
2537 | }; |
2538 | ||
7a8711c9 BF |
2539 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
2540 | { | |
2541 | if (nfsd4_has_session(cstate)) | |
2542 | return nfs_ok; | |
2543 | if (seqid == so->so_seqid - 1) | |
2544 | return nfserr_replay_me; | |
2545 | if (seqid == so->so_seqid) | |
2546 | return nfs_ok; | |
2547 | return nfserr_bad_seqid; | |
2548 | } | |
1da177e4 | 2549 | |
b37ad28b | 2550 | __be32 |
6668958f AA |
2551 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
2552 | struct nfsd4_open *open) | |
1da177e4 | 2553 | { |
1da177e4 LT |
2554 | clientid_t *clientid = &open->op_clientid; |
2555 | struct nfs4_client *clp = NULL; | |
2556 | unsigned int strhashval; | |
fe0750e5 | 2557 | struct nfs4_openowner *oo = NULL; |
7a8711c9 | 2558 | __be32 status; |
1da177e4 | 2559 | |
1da177e4 | 2560 | if (!check_name(open->op_owner)) |
0f442aa2 | 2561 | return nfserr_inval; |
1da177e4 LT |
2562 | |
2563 | if (STALE_CLIENTID(&open->op_clientid)) | |
2564 | return nfserr_stale_clientid; | |
2565 | ||
506f275f | 2566 | strhashval = open_ownerstr_hashval(clientid->cl_id, &open->op_owner); |
fe0750e5 BF |
2567 | oo = find_openstateowner_str(strhashval, open); |
2568 | open->op_openowner = oo; | |
2569 | if (!oo) { | |
0f442aa2 | 2570 | /* Make sure the client's lease hasn't expired. */ |
1da177e4 LT |
2571 | clp = find_confirmed_client(clientid); |
2572 | if (clp == NULL) | |
0f442aa2 BF |
2573 | return nfserr_expired; |
2574 | goto renew; | |
1da177e4 | 2575 | } |
dad1c067 | 2576 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
0f442aa2 | 2577 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
2578 | clp = oo->oo_owner.so_client; |
2579 | release_openowner(oo); | |
2580 | open->op_openowner = NULL; | |
0f442aa2 BF |
2581 | goto renew; |
2582 | } | |
fe0750e5 | 2583 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
7a8711c9 BF |
2584 | if (status) |
2585 | return status; | |
1da177e4 | 2586 | renew: |
fe0750e5 BF |
2587 | if (open->op_openowner == NULL) { |
2588 | oo = alloc_init_open_stateowner(strhashval, clp, open); | |
2589 | if (oo == NULL) | |
3e772463 | 2590 | return nfserr_jukebox; |
fe0750e5 | 2591 | open->op_openowner = oo; |
0f442aa2 | 2592 | } |
fe0750e5 BF |
2593 | list_del_init(&oo->oo_close_lru); |
2594 | renew_client(oo->oo_owner.so_client); | |
0f442aa2 | 2595 | return nfs_ok; |
1da177e4 LT |
2596 | } |
2597 | ||
b37ad28b | 2598 | static inline __be32 |
4a6e43e6 N |
2599 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
2600 | { | |
2601 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
2602 | return nfserr_openmode; | |
2603 | else | |
2604 | return nfs_ok; | |
2605 | } | |
2606 | ||
f459e453 | 2607 | static int share_access_to_flags(u32 share_access) |
52f4fb43 | 2608 | { |
f459e453 | 2609 | share_access &= ~NFS4_SHARE_WANT_MASK; |
52f4fb43 | 2610 | |
f459e453 | 2611 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
52f4fb43 N |
2612 | } |
2613 | ||
f459e453 | 2614 | static struct nfs4_delegation *find_deleg_stateid(stateid_t *s) |
24a0111e | 2615 | { |
f459e453 | 2616 | struct nfs4_stid *ret; |
24a0111e | 2617 | |
f459e453 BF |
2618 | ret = find_stateid_by_type(s, NFS4_DELEG_STID); |
2619 | if (!ret) | |
2620 | return NULL; | |
2621 | return delegstateid(ret); | |
24a0111e BF |
2622 | } |
2623 | ||
b37ad28b | 2624 | static __be32 |
567d9829 N |
2625 | nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, |
2626 | struct nfs4_delegation **dp) | |
2627 | { | |
2628 | int flags; | |
b37ad28b | 2629 | __be32 status = nfserr_bad_stateid; |
567d9829 | 2630 | |
f459e453 | 2631 | *dp = find_deleg_stateid(&open->op_delegate_stateid); |
567d9829 | 2632 | if (*dp == NULL) |
c44c5eeb | 2633 | goto out; |
24a0111e | 2634 | flags = share_access_to_flags(open->op_share_access); |
567d9829 N |
2635 | status = nfs4_check_delegmode(*dp, flags); |
2636 | if (status) | |
2637 | *dp = NULL; | |
c44c5eeb N |
2638 | out: |
2639 | if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2640 | return nfs_ok; | |
2641 | if (status) | |
2642 | return status; | |
dad1c067 | 2643 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
c44c5eeb | 2644 | return nfs_ok; |
567d9829 N |
2645 | } |
2646 | ||
b37ad28b | 2647 | static __be32 |
dcef0413 | 2648 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp) |
1da177e4 | 2649 | { |
dcef0413 | 2650 | struct nfs4_ol_stateid *local; |
fe0750e5 | 2651 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 2652 | |
8beefa24 | 2653 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
2654 | /* ignore lock owners */ |
2655 | if (local->st_stateowner->so_is_open_owner == 0) | |
2656 | continue; | |
2657 | /* remember if we have seen this open owner */ | |
fe0750e5 | 2658 | if (local->st_stateowner == &oo->oo_owner) |
1da177e4 LT |
2659 | *stpp = local; |
2660 | /* check for conflicting share reservations */ | |
2661 | if (!test_share(local, open)) | |
77eaae8d | 2662 | return nfserr_share_denied; |
1da177e4 | 2663 | } |
77eaae8d | 2664 | return nfs_ok; |
1da177e4 LT |
2665 | } |
2666 | ||
dcef0413 | 2667 | static inline struct nfs4_ol_stateid * |
5ac049ac N |
2668 | nfs4_alloc_stateid(void) |
2669 | { | |
2670 | return kmem_cache_alloc(stateid_slab, GFP_KERNEL); | |
2671 | } | |
2672 | ||
21fb4016 BF |
2673 | static inline int nfs4_access_to_access(u32 nfs4_access) |
2674 | { | |
2675 | int flags = 0; | |
2676 | ||
2677 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
2678 | flags |= NFSD_MAY_READ; | |
2679 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
2680 | flags |= NFSD_MAY_WRITE; | |
2681 | return flags; | |
2682 | } | |
2683 | ||
0c12eaff CB |
2684 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
2685 | struct svc_fh *cur_fh, struct nfsd4_open *open) | |
f9d7562f BF |
2686 | { |
2687 | __be32 status; | |
0c12eaff CB |
2688 | int oflag = nfs4_access_to_omode(open->op_share_access); |
2689 | int access = nfs4_access_to_access(open->op_share_access); | |
2690 | ||
2691 | /* CLAIM_DELEGATE_CUR is used in response to a broken lease; | |
2692 | * allowing it to break the lease and return EAGAIN leaves the | |
2693 | * client unable to make progress in returning the delegation */ | |
2694 | if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2695 | access |= NFSD_MAY_NOT_BREAK_LEASE; | |
f9d7562f BF |
2696 | |
2697 | if (!fp->fi_fds[oflag]) { | |
2698 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, | |
2699 | &fp->fi_fds[oflag]); | |
f9d7562f BF |
2700 | if (status) |
2701 | return status; | |
2702 | } | |
2703 | nfs4_file_get_access(fp, oflag); | |
2704 | ||
2705 | return nfs_ok; | |
2706 | } | |
2707 | ||
b37ad28b | 2708 | static __be32 |
dcef0413 | 2709 | nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_ol_stateid **stpp, |
f9d7562f BF |
2710 | struct nfs4_file *fp, struct svc_fh *cur_fh, |
2711 | struct nfsd4_open *open) | |
1da177e4 | 2712 | { |
dcef0413 | 2713 | struct nfs4_ol_stateid *stp; |
f9d7562f | 2714 | __be32 status; |
1da177e4 | 2715 | |
5ac049ac | 2716 | stp = nfs4_alloc_stateid(); |
1da177e4 | 2717 | if (stp == NULL) |
3e772463 | 2718 | return nfserr_jukebox; |
1da177e4 | 2719 | |
0c12eaff | 2720 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); |
f9d7562f BF |
2721 | if (status) { |
2722 | kmem_cache_free(stateid_slab, stp); | |
2723 | return status; | |
1da177e4 | 2724 | } |
1da177e4 LT |
2725 | *stpp = stp; |
2726 | return 0; | |
2727 | } | |
2728 | ||
b37ad28b | 2729 | static inline __be32 |
1da177e4 LT |
2730 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
2731 | struct nfsd4_open *open) | |
2732 | { | |
2733 | struct iattr iattr = { | |
2734 | .ia_valid = ATTR_SIZE, | |
2735 | .ia_size = 0, | |
2736 | }; | |
2737 | if (!open->op_truncate) | |
2738 | return 0; | |
2739 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 2740 | return nfserr_inval; |
1da177e4 LT |
2741 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
2742 | } | |
2743 | ||
b37ad28b | 2744 | static __be32 |
dcef0413 | 2745 | 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 | 2746 | { |
7d947842 BF |
2747 | u32 op_share_access = open->op_share_access & ~NFS4_SHARE_WANT_MASK; |
2748 | bool new_access; | |
b37ad28b | 2749 | __be32 status; |
1da177e4 | 2750 | |
7d947842 | 2751 | new_access = !test_bit(op_share_access, &stp->st_access_bmap); |
f9d7562f | 2752 | if (new_access) { |
0c12eaff | 2753 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); |
f9d7562f BF |
2754 | if (status) |
2755 | return status; | |
6c26d08f | 2756 | } |
1da177e4 LT |
2757 | status = nfsd4_truncate(rqstp, cur_fh, open); |
2758 | if (status) { | |
f9d7562f | 2759 | if (new_access) { |
f197c271 | 2760 | int oflag = nfs4_access_to_omode(op_share_access); |
f9d7562f BF |
2761 | nfs4_file_put_access(fp, oflag); |
2762 | } | |
1da177e4 LT |
2763 | return status; |
2764 | } | |
2765 | /* remember the open */ | |
24a0111e | 2766 | __set_bit(op_share_access, &stp->st_access_bmap); |
b55e0ba1 | 2767 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
1da177e4 LT |
2768 | |
2769 | return nfs_ok; | |
2770 | } | |
2771 | ||
2772 | ||
1da177e4 | 2773 | static void |
37515177 | 2774 | nfs4_set_claim_prev(struct nfsd4_open *open) |
1da177e4 | 2775 | { |
dad1c067 | 2776 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
fe0750e5 | 2777 | open->op_openowner->oo_owner.so_client->cl_firststate = 1; |
1da177e4 LT |
2778 | } |
2779 | ||
14a24e99 BF |
2780 | /* Should we give out recallable state?: */ |
2781 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
2782 | { | |
2783 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
2784 | return true; | |
2785 | /* | |
2786 | * In the sessions case, since we don't have to establish a | |
2787 | * separate connection for callbacks, we assume it's OK | |
2788 | * until we hear otherwise: | |
2789 | */ | |
2790 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
2791 | } | |
2792 | ||
22d38c4c BF |
2793 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) |
2794 | { | |
2795 | struct file_lock *fl; | |
2796 | ||
2797 | fl = locks_alloc_lock(); | |
2798 | if (!fl) | |
2799 | return NULL; | |
2800 | locks_init_lock(fl); | |
2801 | fl->fl_lmops = &nfsd_lease_mng_ops; | |
2802 | fl->fl_flags = FL_LEASE; | |
2803 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; | |
2804 | fl->fl_end = OFFSET_MAX; | |
acfdf5c3 | 2805 | fl->fl_owner = (fl_owner_t)(dp->dl_file); |
22d38c4c | 2806 | fl->fl_pid = current->tgid; |
22d38c4c BF |
2807 | return fl; |
2808 | } | |
2809 | ||
edab9782 BF |
2810 | static int nfs4_setlease(struct nfs4_delegation *dp, int flag) |
2811 | { | |
acfdf5c3 | 2812 | struct nfs4_file *fp = dp->dl_file; |
edab9782 BF |
2813 | struct file_lock *fl; |
2814 | int status; | |
2815 | ||
2816 | fl = nfs4_alloc_init_lease(dp, flag); | |
2817 | if (!fl) | |
2818 | return -ENOMEM; | |
acfdf5c3 | 2819 | fl->fl_file = find_readable_file(fp); |
2a74aba7 | 2820 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); |
acfdf5c3 | 2821 | status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); |
edab9782 | 2822 | if (status) { |
acfdf5c3 | 2823 | list_del_init(&dp->dl_perclnt); |
edab9782 BF |
2824 | locks_free_lock(fl); |
2825 | return -ENOMEM; | |
2826 | } | |
acfdf5c3 BF |
2827 | fp->fi_lease = fl; |
2828 | fp->fi_deleg_file = fl->fl_file; | |
2829 | get_file(fp->fi_deleg_file); | |
2830 | atomic_set(&fp->fi_delegees, 1); | |
2831 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2832 | return 0; | |
2833 | } | |
2834 | ||
2835 | static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag) | |
2836 | { | |
2837 | struct nfs4_file *fp = dp->dl_file; | |
2838 | ||
2839 | if (!fp->fi_lease) | |
2840 | return nfs4_setlease(dp, flag); | |
2841 | spin_lock(&recall_lock); | |
2842 | if (fp->fi_had_conflict) { | |
2843 | spin_unlock(&recall_lock); | |
2844 | return -EAGAIN; | |
2845 | } | |
2846 | atomic_inc(&fp->fi_delegees); | |
2847 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2848 | spin_unlock(&recall_lock); | |
2a74aba7 | 2849 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); |
edab9782 BF |
2850 | return 0; |
2851 | } | |
2852 | ||
1da177e4 LT |
2853 | /* |
2854 | * Attempt to hand out a delegation. | |
2855 | */ | |
2856 | static void | |
dcef0413 | 2857 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_ol_stateid *stp) |
1da177e4 LT |
2858 | { |
2859 | struct nfs4_delegation *dp; | |
fe0750e5 | 2860 | struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner); |
14a24e99 | 2861 | int cb_up; |
1da177e4 LT |
2862 | int status, flag = 0; |
2863 | ||
fe0750e5 | 2864 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
1da177e4 | 2865 | flag = NFS4_OPEN_DELEGATE_NONE; |
7b190fec N |
2866 | open->op_recall = 0; |
2867 | switch (open->op_claim_type) { | |
2868 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 2869 | if (!cb_up) |
7b190fec N |
2870 | open->op_recall = 1; |
2871 | flag = open->op_delegate_type; | |
2872 | if (flag == NFS4_OPEN_DELEGATE_NONE) | |
2873 | goto out; | |
2874 | break; | |
2875 | case NFS4_OPEN_CLAIM_NULL: | |
2876 | /* Let's not give out any delegations till everyone's | |
2877 | * had the chance to reclaim theirs.... */ | |
af558e33 | 2878 | if (locks_in_grace()) |
7b190fec | 2879 | goto out; |
dad1c067 | 2880 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
7b190fec N |
2881 | goto out; |
2882 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | |
2883 | flag = NFS4_OPEN_DELEGATE_WRITE; | |
2884 | else | |
2885 | flag = NFS4_OPEN_DELEGATE_READ; | |
2886 | break; | |
2887 | default: | |
2888 | goto out; | |
2889 | } | |
1da177e4 | 2890 | |
fe0750e5 | 2891 | dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh, flag); |
dd239cc0 BF |
2892 | if (dp == NULL) |
2893 | goto out_no_deleg; | |
acfdf5c3 | 2894 | status = nfs4_set_delegation(dp, flag); |
edab9782 | 2895 | if (status) |
dd239cc0 | 2896 | goto out_free; |
1da177e4 | 2897 | |
d5477a8d | 2898 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 2899 | |
8c10cbdb | 2900 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
d5477a8d | 2901 | STATEID_VAL(&dp->dl_stid.sc_stateid)); |
1da177e4 | 2902 | out: |
7b190fec N |
2903 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS |
2904 | && flag == NFS4_OPEN_DELEGATE_NONE | |
2905 | && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) | |
2fdada03 | 2906 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
1da177e4 | 2907 | open->op_delegate_type = flag; |
dd239cc0 BF |
2908 | return; |
2909 | out_free: | |
acfdf5c3 | 2910 | nfs4_put_delegation(dp); |
dd239cc0 BF |
2911 | out_no_deleg: |
2912 | flag = NFS4_OPEN_DELEGATE_NONE; | |
2913 | goto out; | |
1da177e4 LT |
2914 | } |
2915 | ||
2916 | /* | |
2917 | * called with nfs4_lock_state() held. | |
2918 | */ | |
b37ad28b | 2919 | __be32 |
1da177e4 LT |
2920 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
2921 | { | |
6668958f | 2922 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
1da177e4 LT |
2923 | struct nfs4_file *fp = NULL; |
2924 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
dcef0413 | 2925 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 2926 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 2927 | __be32 status; |
1da177e4 LT |
2928 | |
2929 | status = nfserr_inval; | |
d87a8ade | 2930 | if (!access_valid(open->op_share_access, resp->cstate.minorversion) |
ba5a6a19 | 2931 | || !deny_valid(open->op_share_deny)) |
1da177e4 LT |
2932 | goto out; |
2933 | /* | |
2934 | * Lookup file; if found, lookup stateid and check open request, | |
2935 | * and check for delegations in the process of being recalled. | |
2936 | * If not found, create the nfs4_file struct | |
2937 | */ | |
2938 | fp = find_file(ino); | |
2939 | if (fp) { | |
2940 | if ((status = nfs4_check_open(fp, open, &stp))) | |
2941 | goto out; | |
c44c5eeb N |
2942 | status = nfs4_check_deleg(fp, open, &dp); |
2943 | if (status) | |
2944 | goto out; | |
1da177e4 | 2945 | } else { |
c44c5eeb N |
2946 | status = nfserr_bad_stateid; |
2947 | if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2948 | goto out; | |
3e772463 | 2949 | status = nfserr_jukebox; |
1da177e4 LT |
2950 | fp = alloc_init_file(ino); |
2951 | if (fp == NULL) | |
2952 | goto out; | |
2953 | } | |
2954 | ||
2955 | /* | |
2956 | * OPEN the file, or upgrade an existing OPEN. | |
2957 | * If truncate fails, the OPEN fails. | |
2958 | */ | |
2959 | if (stp) { | |
2960 | /* Stateid was found, this is an OPEN upgrade */ | |
f9d7562f | 2961 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
1da177e4 LT |
2962 | if (status) |
2963 | goto out; | |
2964 | } else { | |
f9d7562f | 2965 | status = nfs4_new_open(rqstp, &stp, fp, current_fh, open); |
567d9829 | 2966 | if (status) |
1da177e4 | 2967 | goto out; |
6136d2b4 BF |
2968 | status = init_open_stateid(stp, fp, open); |
2969 | if (status) { | |
2970 | release_open_stateid(stp); | |
2971 | goto out; | |
2972 | } | |
1da177e4 LT |
2973 | status = nfsd4_truncate(rqstp, current_fh, open); |
2974 | if (status) { | |
2283963f | 2975 | release_open_stateid(stp); |
1da177e4 LT |
2976 | goto out; |
2977 | } | |
2978 | } | |
dcef0413 BF |
2979 | update_stateid(&stp->st_stid.sc_stateid); |
2980 | memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 2981 | |
4dc6ec00 | 2982 | if (nfsd4_has_session(&resp->cstate)) |
dad1c067 | 2983 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
6668958f | 2984 | |
1da177e4 LT |
2985 | /* |
2986 | * Attempt to hand out a delegation. No error return, because the | |
2987 | * OPEN succeeds even if we fail. | |
2988 | */ | |
2989 | nfs4_open_delegation(current_fh, open, stp); | |
2990 | ||
2991 | status = nfs_ok; | |
2992 | ||
8c10cbdb | 2993 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
dcef0413 | 2994 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
1da177e4 | 2995 | out: |
13cd2184 N |
2996 | if (fp) |
2997 | put_nfs4_file(fp); | |
37515177 N |
2998 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
2999 | nfs4_set_claim_prev(open); | |
1da177e4 LT |
3000 | /* |
3001 | * To finish the open response, we just need to set the rflags. | |
3002 | */ | |
3003 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
dad1c067 | 3004 | if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && |
6668958f | 3005 | !nfsd4_has_session(&resp->cstate)) |
1da177e4 LT |
3006 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
3007 | ||
3008 | return status; | |
3009 | } | |
3010 | ||
b37ad28b | 3011 | __be32 |
b591480b BF |
3012 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3013 | clientid_t *clid) | |
1da177e4 LT |
3014 | { |
3015 | struct nfs4_client *clp; | |
b37ad28b | 3016 | __be32 status; |
1da177e4 LT |
3017 | |
3018 | nfs4_lock_state(); | |
3019 | dprintk("process_renew(%08x/%08x): starting\n", | |
3020 | clid->cl_boot, clid->cl_id); | |
3021 | status = nfserr_stale_clientid; | |
3022 | if (STALE_CLIENTID(clid)) | |
3023 | goto out; | |
3024 | clp = find_confirmed_client(clid); | |
3025 | status = nfserr_expired; | |
3026 | if (clp == NULL) { | |
3027 | /* We assume the client took too long to RENEW. */ | |
3028 | dprintk("nfsd4_renew: clientid not found!\n"); | |
3029 | goto out; | |
3030 | } | |
3031 | renew_client(clp); | |
3032 | status = nfserr_cb_path_down; | |
ea1da636 | 3033 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 3034 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
3035 | goto out; |
3036 | status = nfs_ok; | |
3037 | out: | |
3038 | nfs4_unlock_state(); | |
3039 | return status; | |
3040 | } | |
3041 | ||
c47d832b | 3042 | static struct lock_manager nfsd4_manager = { |
af558e33 BF |
3043 | }; |
3044 | ||
a76b4319 | 3045 | static void |
af558e33 | 3046 | nfsd4_end_grace(void) |
a76b4319 N |
3047 | { |
3048 | dprintk("NFSD: end of grace period\n"); | |
c7b9a459 | 3049 | nfsd4_recdir_purge_old(); |
af558e33 | 3050 | locks_end_grace(&nfsd4_manager); |
e46b498c BF |
3051 | /* |
3052 | * Now that every NFSv4 client has had the chance to recover and | |
3053 | * to see the (possibly new, possibly shorter) lease time, we | |
3054 | * can safely set the next grace time to the current lease time: | |
3055 | */ | |
3056 | nfsd4_grace = nfsd4_lease; | |
a76b4319 N |
3057 | } |
3058 | ||
fd39ca9a | 3059 | static time_t |
1da177e4 LT |
3060 | nfs4_laundromat(void) |
3061 | { | |
3062 | struct nfs4_client *clp; | |
fe0750e5 | 3063 | struct nfs4_openowner *oo; |
1da177e4 LT |
3064 | struct nfs4_delegation *dp; |
3065 | struct list_head *pos, *next, reaplist; | |
cf07d2ea BF |
3066 | time_t cutoff = get_seconds() - nfsd4_lease; |
3067 | time_t t, clientid_val = nfsd4_lease; | |
3068 | time_t u, test_val = nfsd4_lease; | |
1da177e4 LT |
3069 | |
3070 | nfs4_lock_state(); | |
3071 | ||
3072 | dprintk("NFSD: laundromat service - starting\n"); | |
af558e33 BF |
3073 | if (locks_in_grace()) |
3074 | nfsd4_end_grace(); | |
36acb66b BH |
3075 | INIT_LIST_HEAD(&reaplist); |
3076 | spin_lock(&client_lock); | |
1da177e4 LT |
3077 | list_for_each_safe(pos, next, &client_lru) { |
3078 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
3079 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
3080 | t = clp->cl_time - cutoff; | |
3081 | if (clientid_val > t) | |
3082 | clientid_val = t; | |
3083 | break; | |
3084 | } | |
d7682988 BH |
3085 | if (atomic_read(&clp->cl_refcount)) { |
3086 | dprintk("NFSD: client in use (clientid %08x)\n", | |
3087 | clp->cl_clientid.cl_id); | |
3088 | continue; | |
3089 | } | |
3090 | unhash_client_locked(clp); | |
3091 | list_add(&clp->cl_lru, &reaplist); | |
36acb66b BH |
3092 | } |
3093 | spin_unlock(&client_lock); | |
3094 | list_for_each_safe(pos, next, &reaplist) { | |
3095 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
3096 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
3097 | clp->cl_clientid.cl_id); | |
c7b9a459 | 3098 | nfsd4_remove_clid_dir(clp); |
1da177e4 LT |
3099 | expire_client(clp); |
3100 | } | |
1da177e4 LT |
3101 | spin_lock(&recall_lock); |
3102 | list_for_each_safe(pos, next, &del_recall_lru) { | |
3103 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3104 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
3105 | u = dp->dl_time - cutoff; | |
3106 | if (test_val > u) | |
3107 | test_val = u; | |
3108 | break; | |
3109 | } | |
1da177e4 LT |
3110 | list_move(&dp->dl_recall_lru, &reaplist); |
3111 | } | |
3112 | spin_unlock(&recall_lock); | |
3113 | list_for_each_safe(pos, next, &reaplist) { | |
3114 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3115 | list_del_init(&dp->dl_recall_lru); | |
3116 | unhash_delegation(dp); | |
3117 | } | |
cf07d2ea | 3118 | test_val = nfsd4_lease; |
1da177e4 | 3119 | list_for_each_safe(pos, next, &close_lru) { |
fe0750e5 BF |
3120 | oo = container_of(pos, struct nfs4_openowner, oo_close_lru); |
3121 | if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { | |
3122 | u = oo->oo_time - cutoff; | |
1da177e4 LT |
3123 | if (test_val > u) |
3124 | test_val = u; | |
3125 | break; | |
3126 | } | |
fe0750e5 | 3127 | release_openowner(oo); |
1da177e4 LT |
3128 | } |
3129 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
3130 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
3131 | nfs4_unlock_state(); | |
3132 | return clientid_val; | |
3133 | } | |
3134 | ||
a254b246 HH |
3135 | static struct workqueue_struct *laundry_wq; |
3136 | static void laundromat_main(struct work_struct *); | |
3137 | static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); | |
3138 | ||
3139 | static void | |
c4028958 | 3140 | laundromat_main(struct work_struct *not_used) |
1da177e4 LT |
3141 | { |
3142 | time_t t; | |
3143 | ||
3144 | t = nfs4_laundromat(); | |
3145 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); | |
58da282b | 3146 | queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); |
1da177e4 LT |
3147 | } |
3148 | ||
f7a4d872 | 3149 | static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) |
1da177e4 | 3150 | { |
f7a4d872 BF |
3151 | if (fhp->fh_dentry->d_inode != stp->st_file->fi_inode) |
3152 | return nfserr_bad_stateid; | |
3153 | return nfs_ok; | |
1da177e4 LT |
3154 | } |
3155 | ||
3156 | static int | |
3157 | STALE_STATEID(stateid_t *stateid) | |
3158 | { | |
d3b313a4 | 3159 | if (stateid->si_opaque.so_clid.cl_boot == boot_time) |
e4e83ea4 BF |
3160 | return 0; |
3161 | dprintk("NFSD: stale stateid " STATEID_FMT "!\n", | |
8c10cbdb | 3162 | STATEID_VAL(stateid)); |
e4e83ea4 | 3163 | return 1; |
1da177e4 LT |
3164 | } |
3165 | ||
3166 | static inline int | |
3167 | access_permit_read(unsigned long access_bmap) | |
3168 | { | |
3169 | return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || | |
3170 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || | |
3171 | test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); | |
3172 | } | |
3173 | ||
3174 | static inline int | |
3175 | access_permit_write(unsigned long access_bmap) | |
3176 | { | |
3177 | return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || | |
3178 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); | |
3179 | } | |
3180 | ||
3181 | static | |
dcef0413 | 3182 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
1da177e4 | 3183 | { |
b37ad28b | 3184 | __be32 status = nfserr_openmode; |
1da177e4 | 3185 | |
02921914 BF |
3186 | /* For lock stateid's, we test the parent open, not the lock: */ |
3187 | if (stp->st_openstp) | |
3188 | stp = stp->st_openstp; | |
1da177e4 LT |
3189 | if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) |
3190 | goto out; | |
3191 | if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) | |
3192 | goto out; | |
3193 | status = nfs_ok; | |
3194 | out: | |
3195 | return status; | |
3196 | } | |
3197 | ||
b37ad28b | 3198 | static inline __be32 |
1da177e4 LT |
3199 | check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) |
3200 | { | |
203a8c8e | 3201 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 3202 | return nfs_ok; |
af558e33 | 3203 | else if (locks_in_grace()) { |
25985edc | 3204 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
3205 | * conflicting state; so we must wait out the grace period. */ |
3206 | return nfserr_grace; | |
3207 | } else if (flags & WR_STATE) | |
3208 | return nfs4_share_conflict(current_fh, | |
3209 | NFS4_SHARE_DENY_WRITE); | |
3210 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
3211 | return nfs4_share_conflict(current_fh, | |
3212 | NFS4_SHARE_DENY_READ); | |
3213 | } | |
3214 | ||
3215 | /* | |
3216 | * Allow READ/WRITE during grace period on recovered state only for files | |
3217 | * that are not able to provide mandatory locking. | |
3218 | */ | |
3219 | static inline int | |
18f82731 | 3220 | grace_disallows_io(struct inode *inode) |
1da177e4 | 3221 | { |
203a8c8e | 3222 | return locks_in_grace() && mandatory_lock(inode); |
1da177e4 LT |
3223 | } |
3224 | ||
81b82965 BF |
3225 | /* Returns true iff a is later than b: */ |
3226 | static bool stateid_generation_after(stateid_t *a, stateid_t *b) | |
3227 | { | |
3228 | return (s32)a->si_generation - (s32)b->si_generation > 0; | |
3229 | } | |
3230 | ||
28dde241 | 3231 | static int check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 3232 | { |
6668958f AA |
3233 | /* |
3234 | * When sessions are used the stateid generation number is ignored | |
3235 | * when it is zero. | |
3236 | */ | |
28dde241 | 3237 | if (has_session && in->si_generation == 0) |
81b82965 BF |
3238 | return nfs_ok; |
3239 | ||
3240 | if (in->si_generation == ref->si_generation) | |
3241 | return nfs_ok; | |
6668958f | 3242 | |
0836f587 | 3243 | /* If the client sends us a stateid from the future, it's buggy: */ |
81b82965 | 3244 | if (stateid_generation_after(in, ref)) |
0836f587 BF |
3245 | return nfserr_bad_stateid; |
3246 | /* | |
81b82965 BF |
3247 | * However, we could see a stateid from the past, even from a |
3248 | * non-buggy client. For example, if the client sends a lock | |
3249 | * while some IO is outstanding, the lock may bump si_generation | |
3250 | * while the IO is still in flight. The client could avoid that | |
3251 | * situation by waiting for responses on all the IO requests, | |
3252 | * but better performance may result in retrying IO that | |
3253 | * receives an old_stateid error if requests are rarely | |
3254 | * reordered in flight: | |
0836f587 | 3255 | */ |
81b82965 | 3256 | return nfserr_old_stateid; |
0836f587 BF |
3257 | } |
3258 | ||
36279ac1 | 3259 | __be32 nfs4_validate_stateid(stateid_t *stateid) |
17456804 | 3260 | { |
97b7e3b6 BF |
3261 | struct nfs4_stid *s; |
3262 | struct nfs4_ol_stateid *ols; | |
3263 | __be32 status; | |
17456804 BS |
3264 | |
3265 | if (STALE_STATEID(stateid)) | |
97b7e3b6 | 3266 | return nfserr_stale_stateid; |
17456804 | 3267 | |
97b7e3b6 BF |
3268 | s = find_stateid(stateid); |
3269 | if (!s) | |
3270 | return nfserr_stale_stateid; | |
36279ac1 | 3271 | status = check_stateid_generation(stateid, &s->sc_stateid, 1); |
17456804 | 3272 | if (status) |
97b7e3b6 BF |
3273 | return status; |
3274 | if (!(s->sc_type & (NFS4_OPEN_STID | NFS4_LOCK_STID))) | |
3275 | return nfs_ok; | |
3276 | ols = openlockstateid(s); | |
3277 | if (ols->st_stateowner->so_is_open_owner | |
dad1c067 | 3278 | && !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
97b7e3b6 BF |
3279 | return nfserr_bad_stateid; |
3280 | return nfs_ok; | |
17456804 BS |
3281 | } |
3282 | ||
1da177e4 LT |
3283 | /* |
3284 | * Checks for stateid operations | |
3285 | */ | |
b37ad28b | 3286 | __be32 |
dd453dfd BH |
3287 | nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, |
3288 | stateid_t *stateid, int flags, struct file **filpp) | |
1da177e4 | 3289 | { |
69064a27 | 3290 | struct nfs4_stid *s; |
dcef0413 | 3291 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 3292 | struct nfs4_delegation *dp = NULL; |
dd453dfd | 3293 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 3294 | struct inode *ino = current_fh->fh_dentry->d_inode; |
b37ad28b | 3295 | __be32 status; |
1da177e4 | 3296 | |
1da177e4 LT |
3297 | if (filpp) |
3298 | *filpp = NULL; | |
3299 | ||
18f82731 | 3300 | if (grace_disallows_io(ino)) |
1da177e4 LT |
3301 | return nfserr_grace; |
3302 | ||
3303 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3304 | return check_special_stateids(current_fh, stateid, flags); | |
3305 | ||
1da177e4 LT |
3306 | status = nfserr_stale_stateid; |
3307 | if (STALE_STATEID(stateid)) | |
3308 | goto out; | |
3309 | ||
33515142 BF |
3310 | /* |
3311 | * We assume that any stateid that has the current boot time, | |
3312 | * but that we can't find, is expired: | |
3313 | */ | |
3314 | status = nfserr_expired; | |
69064a27 BF |
3315 | s = find_stateid(stateid); |
3316 | if (!s) | |
3317 | goto out; | |
3318 | status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); | |
3319 | if (status) | |
3320 | goto out; | |
f7a4d872 BF |
3321 | switch (s->sc_type) { |
3322 | case NFS4_DELEG_STID: | |
69064a27 | 3323 | dp = delegstateid(s); |
dc9bf700 BF |
3324 | status = nfs4_check_delegmode(dp, flags); |
3325 | if (status) | |
3326 | goto out; | |
2a74aba7 | 3327 | renew_client(dp->dl_stid.sc_client); |
43b0178e | 3328 | if (filpp) { |
acfdf5c3 | 3329 | *filpp = dp->dl_file->fi_deleg_file; |
43b0178e DC |
3330 | BUG_ON(!*filpp); |
3331 | } | |
f7a4d872 BF |
3332 | break; |
3333 | case NFS4_OPEN_STID: | |
3334 | case NFS4_LOCK_STID: | |
69064a27 | 3335 | stp = openlockstateid(s); |
f7a4d872 BF |
3336 | status = nfs4_check_fh(current_fh, stp); |
3337 | if (status) | |
1da177e4 | 3338 | goto out; |
fe0750e5 | 3339 | if (stp->st_stateowner->so_is_open_owner |
dad1c067 | 3340 | && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
1da177e4 | 3341 | goto out; |
a4455be0 BF |
3342 | status = nfs4_check_openmode(stp, flags); |
3343 | if (status) | |
1da177e4 LT |
3344 | goto out; |
3345 | renew_client(stp->st_stateowner->so_client); | |
f9d7562f BF |
3346 | if (filpp) { |
3347 | if (flags & RD_STATE) | |
3348 | *filpp = find_readable_file(stp->st_file); | |
3349 | else | |
3350 | *filpp = find_writeable_file(stp->st_file); | |
f9d7562f | 3351 | } |
f7a4d872 BF |
3352 | break; |
3353 | default: | |
3354 | return nfserr_bad_stateid; | |
1da177e4 LT |
3355 | } |
3356 | status = nfs_ok; | |
3357 | out: | |
3358 | return status; | |
3359 | } | |
3360 | ||
e1ca12df | 3361 | static __be32 |
dcef0413 | 3362 | nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) |
e1ca12df | 3363 | { |
fe0750e5 | 3364 | if (check_for_locks(stp->st_file, lockowner(stp->st_stateowner))) |
e1ca12df BS |
3365 | return nfserr_locks_held; |
3366 | release_lock_stateid(stp); | |
3367 | return nfs_ok; | |
3368 | } | |
3369 | ||
17456804 BS |
3370 | /* |
3371 | * Test if the stateid is valid | |
3372 | */ | |
3373 | __be32 | |
3374 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3375 | struct nfsd4_test_stateid *test_stateid) | |
3376 | { | |
36279ac1 | 3377 | /* real work is done during encoding */ |
17456804 BS |
3378 | return nfs_ok; |
3379 | } | |
3380 | ||
e1ca12df BS |
3381 | __be32 |
3382 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3383 | struct nfsd4_free_stateid *free_stateid) | |
3384 | { | |
3385 | stateid_t *stateid = &free_stateid->fr_stateid; | |
2da1cec7 BF |
3386 | struct nfs4_stid *s; |
3387 | __be32 ret = nfserr_bad_stateid; | |
e1ca12df BS |
3388 | |
3389 | nfs4_lock_state(); | |
2da1cec7 BF |
3390 | s = find_stateid(stateid); |
3391 | if (!s) | |
81b82965 | 3392 | goto out; |
2da1cec7 BF |
3393 | switch (s->sc_type) { |
3394 | case NFS4_DELEG_STID: | |
e1ca12df BS |
3395 | ret = nfserr_locks_held; |
3396 | goto out; | |
2da1cec7 BF |
3397 | case NFS4_OPEN_STID: |
3398 | case NFS4_LOCK_STID: | |
3399 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); | |
3400 | if (ret) | |
3401 | goto out; | |
3402 | if (s->sc_type == NFS4_LOCK_STID) | |
3403 | ret = nfsd4_free_lock_stateid(openlockstateid(s)); | |
3404 | else | |
3405 | ret = nfserr_locks_held; | |
f7a4d872 BF |
3406 | break; |
3407 | default: | |
3408 | ret = nfserr_bad_stateid; | |
e1ca12df | 3409 | } |
e1ca12df BS |
3410 | out: |
3411 | nfs4_unlock_state(); | |
3412 | return ret; | |
3413 | } | |
3414 | ||
4c4cd222 N |
3415 | static inline int |
3416 | setlkflg (int type) | |
3417 | { | |
3418 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
3419 | RD_STATE : WR_STATE; | |
3420 | } | |
1da177e4 | 3421 | |
c0a5d93e BF |
3422 | static __be32 nfs4_nospecial_stateid_checks(stateid_t *stateid) |
3423 | { | |
3424 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3425 | return nfserr_bad_stateid; | |
3426 | if (STALE_STATEID(stateid)) | |
3427 | return nfserr_stale_stateid; | |
3428 | return nfs_ok; | |
3429 | } | |
3430 | ||
dcef0413 | 3431 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
c0a5d93e BF |
3432 | { |
3433 | struct svc_fh *current_fh = &cstate->current_fh; | |
3434 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
3435 | __be32 status; | |
3436 | ||
c0a5d93e BF |
3437 | status = nfsd4_check_seqid(cstate, sop, seqid); |
3438 | if (status) | |
3439 | return status; | |
f7a4d872 BF |
3440 | if (stp->st_stid.sc_type == NFS4_CLOSED_STID) |
3441 | /* | |
3442 | * "Closed" stateid's exist *only* to return | |
3443 | * nfserr_replay_me from the previous step. | |
3444 | */ | |
3445 | return nfserr_bad_stateid; | |
3446 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); | |
3447 | if (status) | |
3448 | return status; | |
3449 | return nfs4_check_fh(current_fh, stp); | |
c0a5d93e BF |
3450 | } |
3451 | ||
1da177e4 LT |
3452 | /* |
3453 | * Checks for sequence id mutating operations. | |
3454 | */ | |
b37ad28b | 3455 | static __be32 |
dd453dfd | 3456 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2288d0e3 | 3457 | stateid_t *stateid, char typemask, |
dcef0413 | 3458 | struct nfs4_ol_stateid **stpp) |
1da177e4 | 3459 | { |
0836f587 | 3460 | __be32 status; |
1da177e4 | 3461 | |
8c10cbdb BH |
3462 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
3463 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 3464 | |
1da177e4 | 3465 | *stpp = NULL; |
c0a5d93e BF |
3466 | status = nfs4_nospecial_stateid_checks(stateid); |
3467 | if (status) | |
3468 | return status; | |
f459e453 | 3469 | *stpp = find_ol_stateid_by_type(stateid, typemask); |
f4dee24c BF |
3470 | if (*stpp == NULL) |
3471 | return nfserr_expired; | |
c0a5d93e BF |
3472 | cstate->replay_owner = (*stpp)->st_stateowner; |
3473 | renew_client((*stpp)->st_stateowner->so_client); | |
1da177e4 | 3474 | |
c0a5d93e BF |
3475 | return nfs4_seqid_op_checks(cstate, stateid, seqid, *stpp); |
3476 | } | |
39325bd0 | 3477 | |
dcef0413 | 3478 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, stateid_t *stateid, struct nfs4_ol_stateid **stpp) |
c0a5d93e BF |
3479 | { |
3480 | __be32 status; | |
3481 | struct nfs4_openowner *oo; | |
1da177e4 | 3482 | |
c0a5d93e | 3483 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
2288d0e3 | 3484 | NFS4_OPEN_STID, stpp); |
7a8711c9 BF |
3485 | if (status) |
3486 | return status; | |
c0a5d93e | 3487 | oo = openowner((*stpp)->st_stateowner); |
dad1c067 | 3488 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) |
3a4f98bb | 3489 | return nfserr_bad_stateid; |
3a4f98bb | 3490 | return nfs_ok; |
1da177e4 LT |
3491 | } |
3492 | ||
b37ad28b | 3493 | __be32 |
ca364317 | 3494 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3495 | struct nfsd4_open_confirm *oc) |
1da177e4 | 3496 | { |
b37ad28b | 3497 | __be32 status; |
fe0750e5 | 3498 | struct nfs4_openowner *oo; |
dcef0413 | 3499 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
3500 | |
3501 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | |
ca364317 BF |
3502 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3503 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3504 | |
ca364317 | 3505 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
3506 | if (status) |
3507 | return status; | |
1da177e4 LT |
3508 | |
3509 | nfs4_lock_state(); | |
3510 | ||
9072d5c6 | 3511 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3512 | oc->oc_seqid, &oc->oc_req_stateid, |
2288d0e3 | 3513 | NFS4_OPEN_STID, &stp); |
9072d5c6 | 3514 | if (status) |
68b66e82 | 3515 | goto out; |
fe0750e5 | 3516 | oo = openowner(stp->st_stateowner); |
68b66e82 | 3517 | status = nfserr_bad_stateid; |
dad1c067 | 3518 | if (oo->oo_flags & NFS4_OO_CONFIRMED) |
68b66e82 | 3519 | goto out; |
dad1c067 | 3520 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
dcef0413 BF |
3521 | update_stateid(&stp->st_stid.sc_stateid); |
3522 | memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
8c10cbdb | 3523 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
dcef0413 | 3524 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); |
c7b9a459 | 3525 | |
fe0750e5 | 3526 | nfsd4_create_clid_dir(oo->oo_owner.so_client); |
68b66e82 | 3527 | status = nfs_ok; |
1da177e4 | 3528 | out: |
5ec094c1 BF |
3529 | if (!cstate->replay_owner) |
3530 | nfs4_unlock_state(); | |
1da177e4 LT |
3531 | return status; |
3532 | } | |
3533 | ||
dcef0413 | 3534 | static inline void nfs4_file_downgrade(struct nfs4_ol_stateid *stp, unsigned int to_access) |
1da177e4 LT |
3535 | { |
3536 | int i; | |
f197c271 | 3537 | |
1da177e4 | 3538 | for (i = 1; i < 4; i++) { |
3d02fa29 BF |
3539 | if (test_bit(i, &stp->st_access_bmap) |
3540 | && ((i & to_access) != i)) { | |
3541 | nfs4_file_put_access(stp->st_file, nfs4_access_to_omode(i)); | |
f197c271 BF |
3542 | __clear_bit(i, &stp->st_access_bmap); |
3543 | } | |
1da177e4 LT |
3544 | } |
3545 | } | |
3546 | ||
3547 | static void | |
3548 | reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) | |
3549 | { | |
3550 | int i; | |
3551 | for (i = 0; i < 4; i++) { | |
3552 | if ((i & deny) != i) | |
3553 | __clear_bit(i, bmap); | |
3554 | } | |
3555 | } | |
3556 | ||
b37ad28b | 3557 | __be32 |
ca364317 BF |
3558 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
3559 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 3560 | struct nfsd4_open_downgrade *od) |
1da177e4 | 3561 | { |
b37ad28b | 3562 | __be32 status; |
dcef0413 | 3563 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
3564 | |
3565 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | |
ca364317 BF |
3566 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3567 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3568 | |
d87a8ade | 3569 | if (!access_valid(od->od_share_access, cstate->minorversion) |
ba5a6a19 | 3570 | || !deny_valid(od->od_share_deny)) |
1da177e4 LT |
3571 | return nfserr_inval; |
3572 | ||
3573 | nfs4_lock_state(); | |
c0a5d93e BF |
3574 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
3575 | &od->od_stateid, &stp); | |
9072d5c6 | 3576 | if (status) |
1da177e4 | 3577 | goto out; |
1da177e4 LT |
3578 | status = nfserr_inval; |
3579 | if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { | |
3580 | dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
3581 | stp->st_access_bmap, od->od_share_access); | |
3582 | goto out; | |
3583 | } | |
3584 | if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { | |
3585 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", | |
3586 | stp->st_deny_bmap, od->od_share_deny); | |
3587 | goto out; | |
3588 | } | |
f197c271 | 3589 | nfs4_file_downgrade(stp, od->od_share_access); |
1da177e4 | 3590 | |
1da177e4 LT |
3591 | reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); |
3592 | ||
dcef0413 BF |
3593 | update_stateid(&stp->st_stid.sc_stateid); |
3594 | memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
3595 | status = nfs_ok; |
3596 | out: | |
5ec094c1 BF |
3597 | if (!cstate->replay_owner) |
3598 | nfs4_unlock_state(); | |
1da177e4 LT |
3599 | return status; |
3600 | } | |
3601 | ||
38c387b5 BF |
3602 | void nfsd4_purge_closed_stateid(struct nfs4_stateowner *so) |
3603 | { | |
3604 | struct nfs4_openowner *oo; | |
3605 | struct nfs4_ol_stateid *s; | |
3606 | ||
3607 | if (!so->so_is_open_owner) | |
3608 | return; | |
3609 | oo = openowner(so); | |
3610 | s = oo->oo_last_closed_stid; | |
3611 | if (!s) | |
3612 | return; | |
3613 | if (!(oo->oo_flags & NFS4_OO_PURGE_CLOSE)) { | |
3614 | /* Release the last_closed_stid on the next seqid bump: */ | |
3615 | oo->oo_flags |= NFS4_OO_PURGE_CLOSE; | |
3616 | return; | |
3617 | } | |
3618 | oo->oo_flags &= ~NFS4_OO_PURGE_CLOSE; | |
f7a4d872 BF |
3619 | release_last_closed_stateid(oo); |
3620 | } | |
3621 | ||
3622 | static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) | |
3623 | { | |
3624 | unhash_open_stateid(s); | |
3625 | s->st_stid.sc_type = NFS4_CLOSED_STID; | |
38c387b5 BF |
3626 | } |
3627 | ||
1da177e4 LT |
3628 | /* |
3629 | * nfs4_unlock_state() called after encode | |
3630 | */ | |
b37ad28b | 3631 | __be32 |
ca364317 | 3632 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3633 | struct nfsd4_close *close) |
1da177e4 | 3634 | { |
b37ad28b | 3635 | __be32 status; |
fe0750e5 | 3636 | struct nfs4_openowner *oo; |
dcef0413 | 3637 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
3638 | |
3639 | dprintk("NFSD: nfsd4_close on file %.*s\n", | |
ca364317 BF |
3640 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3641 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 LT |
3642 | |
3643 | nfs4_lock_state(); | |
f7a4d872 BF |
3644 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
3645 | &close->cl_stateid, | |
3646 | NFS4_OPEN_STID|NFS4_CLOSED_STID, | |
3647 | &stp); | |
9072d5c6 | 3648 | if (status) |
1da177e4 | 3649 | goto out; |
fe0750e5 | 3650 | oo = openowner(stp->st_stateowner); |
1da177e4 | 3651 | status = nfs_ok; |
dcef0413 BF |
3652 | update_stateid(&stp->st_stid.sc_stateid); |
3653 | memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3654 | |
f7a4d872 | 3655 | nfsd4_close_open_stateid(stp); |
38c387b5 | 3656 | oo->oo_last_closed_stid = stp; |
04ef5954 BF |
3657 | |
3658 | /* place unused nfs4_stateowners on so_close_lru list to be | |
3659 | * released by the laundromat service after the lease period | |
3660 | * to enable us to handle CLOSE replay | |
3661 | */ | |
fe0750e5 BF |
3662 | if (list_empty(&oo->oo_owner.so_stateids)) |
3663 | move_to_close_lru(oo); | |
1da177e4 | 3664 | out: |
5ec094c1 BF |
3665 | if (!cstate->replay_owner) |
3666 | nfs4_unlock_state(); | |
1da177e4 LT |
3667 | return status; |
3668 | } | |
3669 | ||
b37ad28b | 3670 | __be32 |
ca364317 BF |
3671 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3672 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 3673 | { |
203a8c8e BF |
3674 | struct nfs4_delegation *dp; |
3675 | stateid_t *stateid = &dr->dr_stateid; | |
3676 | struct inode *inode; | |
b37ad28b | 3677 | __be32 status; |
1da177e4 | 3678 | |
ca364317 | 3679 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e BF |
3680 | return status; |
3681 | inode = cstate->current_fh.fh_dentry->d_inode; | |
1da177e4 LT |
3682 | |
3683 | nfs4_lock_state(); | |
203a8c8e BF |
3684 | status = nfserr_bad_stateid; |
3685 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3686 | goto out; | |
3687 | status = nfserr_stale_stateid; | |
3688 | if (STALE_STATEID(stateid)) | |
3689 | goto out; | |
33515142 | 3690 | status = nfserr_expired; |
f459e453 | 3691 | dp = find_deleg_stateid(stateid); |
e4e83ea4 | 3692 | if (!dp) |
203a8c8e | 3693 | goto out; |
d5477a8d | 3694 | status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); |
203a8c8e BF |
3695 | if (status) |
3696 | goto out; | |
2a74aba7 | 3697 | renew_client(dp->dl_stid.sc_client); |
203a8c8e BF |
3698 | |
3699 | unhash_delegation(dp); | |
1da177e4 | 3700 | out: |
203a8c8e BF |
3701 | nfs4_unlock_state(); |
3702 | ||
1da177e4 LT |
3703 | return status; |
3704 | } | |
3705 | ||
3706 | ||
3707 | /* | |
3708 | * Lock owner state (byte-range locks) | |
3709 | */ | |
3710 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) | |
3711 | #define LOCK_HASH_BITS 8 | |
3712 | #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) | |
3713 | #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) | |
3714 | ||
87df4de8 BH |
3715 | static inline u64 |
3716 | end_offset(u64 start, u64 len) | |
3717 | { | |
3718 | u64 end; | |
3719 | ||
3720 | end = start + len; | |
3721 | return end >= start ? end: NFS4_MAX_UINT64; | |
3722 | } | |
3723 | ||
3724 | /* last octet in a range */ | |
3725 | static inline u64 | |
3726 | last_byte_offset(u64 start, u64 len) | |
3727 | { | |
3728 | u64 end; | |
3729 | ||
3730 | BUG_ON(!len); | |
3731 | end = start + len; | |
3732 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
3733 | } | |
3734 | ||
1da177e4 LT |
3735 | static inline unsigned int |
3736 | lock_ownerstr_hashval(struct inode *inode, u32 cl_id, | |
3737 | struct xdr_netobj *ownername) | |
3738 | { | |
3739 | return (file_hashval(inode) + cl_id | |
3740 | + opaque_hashval(ownername->data, ownername->len)) | |
3741 | & LOCK_HASH_MASK; | |
3742 | } | |
3743 | ||
1da177e4 | 3744 | static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; |
1da177e4 | 3745 | |
1da177e4 LT |
3746 | /* |
3747 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
3748 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
3749 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
3750 | * locking, this prevents us from being completely protocol-compliant. The | |
3751 | * real solution to this problem is to start using unsigned file offsets in | |
3752 | * the VFS, but this is a very deep change! | |
3753 | */ | |
3754 | static inline void | |
3755 | nfs4_transform_lock_offset(struct file_lock *lock) | |
3756 | { | |
3757 | if (lock->fl_start < 0) | |
3758 | lock->fl_start = OFFSET_MAX; | |
3759 | if (lock->fl_end < 0) | |
3760 | lock->fl_end = OFFSET_MAX; | |
3761 | } | |
3762 | ||
d5b9026a N |
3763 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
3764 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 3765 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 3766 | }; |
1da177e4 LT |
3767 | |
3768 | static inline void | |
3769 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
3770 | { | |
fe0750e5 | 3771 | struct nfs4_lockowner *lo; |
1da177e4 | 3772 | |
d5b9026a | 3773 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 BF |
3774 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
3775 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, | |
3776 | lo->lo_owner.so_owner.len, GFP_KERNEL); | |
7c13f344 BF |
3777 | if (!deny->ld_owner.data) |
3778 | /* We just don't care that much */ | |
3779 | goto nevermind; | |
fe0750e5 BF |
3780 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
3781 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; | |
d5b9026a | 3782 | } else { |
7c13f344 BF |
3783 | nevermind: |
3784 | deny->ld_owner.len = 0; | |
3785 | deny->ld_owner.data = NULL; | |
d5b9026a N |
3786 | deny->ld_clientid.cl_boot = 0; |
3787 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
3788 | } |
3789 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
3790 | deny->ld_length = NFS4_MAX_UINT64; |
3791 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
3792 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
3793 | deny->ld_type = NFS4_READ_LT; | |
3794 | if (fl->fl_type != F_RDLCK) | |
3795 | deny->ld_type = NFS4_WRITE_LT; | |
3796 | } | |
3797 | ||
fe0750e5 BF |
3798 | static struct nfs4_lockowner * |
3799 | find_lockowner_str(struct inode *inode, clientid_t *clid, | |
1da177e4 LT |
3800 | struct xdr_netobj *owner) |
3801 | { | |
3802 | unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); | |
3803 | struct nfs4_stateowner *op; | |
3804 | ||
3805 | list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { | |
599e0a22 | 3806 | if (same_owner_str(op, owner, clid)) |
fe0750e5 | 3807 | return lockowner(op); |
1da177e4 LT |
3808 | } |
3809 | return NULL; | |
3810 | } | |
3811 | ||
dcef0413 | 3812 | static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp) |
ff194bd9 | 3813 | { |
fe0750e5 BF |
3814 | list_add(&lo->lo_owner.so_strhash, &lock_ownerstr_hashtbl[strhashval]); |
3815 | list_add(&lo->lo_perstateid, &open_stp->st_lockowners); | |
ff194bd9 BF |
3816 | } |
3817 | ||
1da177e4 LT |
3818 | /* |
3819 | * Alloc a lock owner structure. | |
3820 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 3821 | * occurred. |
1da177e4 LT |
3822 | * |
3823 | * strhashval = lock_ownerstr_hashval | |
1da177e4 LT |
3824 | */ |
3825 | ||
fe0750e5 | 3826 | static struct nfs4_lockowner * |
dcef0413 | 3827 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) { |
fe0750e5 | 3828 | struct nfs4_lockowner *lo; |
1da177e4 | 3829 | |
fe0750e5 BF |
3830 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
3831 | if (!lo) | |
1da177e4 | 3832 | return NULL; |
fe0750e5 BF |
3833 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
3834 | lo->lo_owner.so_is_open_owner = 0; | |
b59e3c0e NB |
3835 | /* It is the openowner seqid that will be incremented in encode in the |
3836 | * case of new lockowners; so increment the lock seqid manually: */ | |
fe0750e5 BF |
3837 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; |
3838 | hash_lockowner(lo, strhashval, clp, open_stp); | |
3839 | return lo; | |
1da177e4 LT |
3840 | } |
3841 | ||
dcef0413 BF |
3842 | static struct nfs4_ol_stateid * |
3843 | alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 3844 | { |
dcef0413 | 3845 | struct nfs4_ol_stateid *stp; |
d3b313a4 | 3846 | struct nfs4_client *clp = lo->lo_owner.so_client; |
6136d2b4 | 3847 | __be32 status; |
1da177e4 | 3848 | |
5ac049ac N |
3849 | stp = nfs4_alloc_stateid(); |
3850 | if (stp == NULL) | |
6136d2b4 BF |
3851 | return NULL; |
3852 | status = init_stid(&stp->st_stid, clp, NFS4_LOCK_STID); | |
3853 | if (status) { | |
3854 | free_generic_stateid(stp); | |
3855 | return NULL; | |
3856 | } | |
8beefa24 | 3857 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 BF |
3858 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
3859 | stp->st_stateowner = &lo->lo_owner; | |
13cd2184 | 3860 | get_nfs4_file(fp); |
1da177e4 | 3861 | stp->st_file = fp; |
0997b173 | 3862 | stp->st_access_bmap = 0; |
1da177e4 | 3863 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 3864 | stp->st_openstp = open_stp; |
1da177e4 LT |
3865 | return stp; |
3866 | } | |
3867 | ||
fd39ca9a | 3868 | static int |
1da177e4 LT |
3869 | check_lock_length(u64 offset, u64 length) |
3870 | { | |
87df4de8 | 3871 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
3872 | LOFF_OVERFLOW(offset, length))); |
3873 | } | |
3874 | ||
dcef0413 | 3875 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 BF |
3876 | { |
3877 | struct nfs4_file *fp = lock_stp->st_file; | |
3878 | int oflag = nfs4_access_to_omode(access); | |
3879 | ||
3880 | if (test_bit(access, &lock_stp->st_access_bmap)) | |
3881 | return; | |
3882 | nfs4_file_get_access(fp, oflag); | |
3883 | __set_bit(access, &lock_stp->st_access_bmap); | |
3884 | } | |
3885 | ||
1da177e4 LT |
3886 | /* |
3887 | * LOCK operation | |
3888 | */ | |
b37ad28b | 3889 | __be32 |
ca364317 | 3890 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3891 | struct nfsd4_lock *lock) |
1da177e4 | 3892 | { |
fe0750e5 BF |
3893 | struct nfs4_openowner *open_sop = NULL; |
3894 | struct nfs4_lockowner *lock_sop = NULL; | |
dcef0413 | 3895 | struct nfs4_ol_stateid *lock_stp; |
7d947842 BF |
3896 | struct nfs4_file *fp; |
3897 | struct file *filp = NULL; | |
1da177e4 | 3898 | struct file_lock file_lock; |
8dc7c311 | 3899 | struct file_lock conflock; |
b37ad28b | 3900 | __be32 status = 0; |
1da177e4 | 3901 | unsigned int strhashval; |
b34f27aa | 3902 | int lkflg; |
b8dd7b9a | 3903 | int err; |
1da177e4 LT |
3904 | |
3905 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
3906 | (long long) lock->lk_offset, | |
3907 | (long long) lock->lk_length); | |
3908 | ||
1da177e4 LT |
3909 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
3910 | return nfserr_inval; | |
3911 | ||
ca364317 | 3912 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 3913 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
3914 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
3915 | return status; | |
3916 | } | |
3917 | ||
1da177e4 LT |
3918 | nfs4_lock_state(); |
3919 | ||
3920 | if (lock->lk_is_new) { | |
893f8770 N |
3921 | /* |
3922 | * Client indicates that this is a new lockowner. | |
3923 | * Use open owner and open stateid to create lock owner and | |
3924 | * lock stateid. | |
3925 | */ | |
dcef0413 | 3926 | struct nfs4_ol_stateid *open_stp = NULL; |
1da177e4 LT |
3927 | |
3928 | status = nfserr_stale_clientid; | |
60adfc50 AA |
3929 | if (!nfsd4_has_session(cstate) && |
3930 | STALE_CLIENTID(&lock->lk_new_clientid)) | |
1da177e4 | 3931 | goto out; |
1da177e4 | 3932 | |
1da177e4 | 3933 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 3934 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
3935 | lock->lk_new_open_seqid, |
3936 | &lock->lk_new_open_stateid, | |
c0a5d93e | 3937 | &open_stp); |
37515177 | 3938 | if (status) |
1da177e4 | 3939 | goto out; |
fe0750e5 | 3940 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 3941 | status = nfserr_bad_stateid; |
b34f27aa | 3942 | if (!nfsd4_has_session(cstate) && |
fe0750e5 | 3943 | !same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
b34f27aa BF |
3944 | &lock->v.new.clientid)) |
3945 | goto out; | |
1da177e4 LT |
3946 | /* create lockowner and lock stateid */ |
3947 | fp = open_stp->st_file; | |
fe0750e5 BF |
3948 | strhashval = lock_ownerstr_hashval(fp->fi_inode, |
3949 | open_sop->oo_owner.so_client->cl_clientid.cl_id, | |
1da177e4 | 3950 | &lock->v.new.owner); |
3e9e3dbe N |
3951 | /* XXX: Do we need to check for duplicate stateowners on |
3952 | * the same file, or should they just be allowed (and | |
3953 | * create new stateids)? */ | |
3e772463 | 3954 | status = nfserr_jukebox; |
b59e3c0e | 3955 | lock_sop = alloc_init_lock_stateowner(strhashval, |
fe0750e5 | 3956 | open_sop->oo_owner.so_client, open_stp, lock); |
b59e3c0e | 3957 | if (lock_sop == NULL) |
1da177e4 | 3958 | goto out; |
b59e3c0e | 3959 | lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); |
8a280510 | 3960 | if (lock_stp == NULL) |
1da177e4 | 3961 | goto out; |
1da177e4 LT |
3962 | } else { |
3963 | /* lock (lock owner + lock stateid) already exists */ | |
dd453dfd | 3964 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
3965 | lock->lk_old_lock_seqid, |
3966 | &lock->lk_old_lock_stateid, | |
2288d0e3 | 3967 | NFS4_LOCK_STID, &lock_stp); |
1da177e4 LT |
3968 | if (status) |
3969 | goto out; | |
fe0750e5 | 3970 | lock_sop = lockowner(lock_stp->st_stateowner); |
7d947842 | 3971 | fp = lock_stp->st_file; |
1da177e4 | 3972 | } |
9072d5c6 | 3973 | /* lock_sop and lock_stp have been created or found */ |
1da177e4 | 3974 | |
b34f27aa BF |
3975 | lkflg = setlkflg(lock->lk_type); |
3976 | status = nfs4_check_openmode(lock_stp, lkflg); | |
3977 | if (status) | |
3978 | goto out; | |
3979 | ||
0dd395dc | 3980 | status = nfserr_grace; |
af558e33 | 3981 | if (locks_in_grace() && !lock->lk_reclaim) |
0dd395dc N |
3982 | goto out; |
3983 | status = nfserr_no_grace; | |
af558e33 | 3984 | if (!locks_in_grace() && lock->lk_reclaim) |
0dd395dc N |
3985 | goto out; |
3986 | ||
1da177e4 LT |
3987 | locks_init_lock(&file_lock); |
3988 | switch (lock->lk_type) { | |
3989 | case NFS4_READ_LT: | |
3990 | case NFS4_READW_LT: | |
0997b173 BF |
3991 | filp = find_readable_file(lock_stp->st_file); |
3992 | if (filp) | |
3993 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
1da177e4 | 3994 | file_lock.fl_type = F_RDLCK; |
529d7b2a | 3995 | break; |
1da177e4 LT |
3996 | case NFS4_WRITE_LT: |
3997 | case NFS4_WRITEW_LT: | |
0997b173 BF |
3998 | filp = find_writeable_file(lock_stp->st_file); |
3999 | if (filp) | |
4000 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
1da177e4 | 4001 | file_lock.fl_type = F_WRLCK; |
529d7b2a | 4002 | break; |
1da177e4 LT |
4003 | default: |
4004 | status = nfserr_inval; | |
4005 | goto out; | |
4006 | } | |
f9d7562f BF |
4007 | if (!filp) { |
4008 | status = nfserr_openmode; | |
4009 | goto out; | |
4010 | } | |
b59e3c0e | 4011 | file_lock.fl_owner = (fl_owner_t)lock_sop; |
1da177e4 LT |
4012 | file_lock.fl_pid = current->tgid; |
4013 | file_lock.fl_file = filp; | |
4014 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 4015 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
4016 | |
4017 | file_lock.fl_start = lock->lk_offset; | |
87df4de8 | 4018 | file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); |
1da177e4 LT |
4019 | nfs4_transform_lock_offset(&file_lock); |
4020 | ||
4021 | /* | |
4022 | * Try to lock the file in the VFS. | |
4023 | * Note: locks.c uses the BKL to protect the inode's lock list. | |
4024 | */ | |
4025 | ||
529d7b2a | 4026 | err = vfs_lock_file(filp, F_SETLK, &file_lock, &conflock); |
b8dd7b9a | 4027 | switch (-err) { |
1da177e4 | 4028 | case 0: /* success! */ |
dcef0413 BF |
4029 | update_stateid(&lock_stp->st_stid.sc_stateid); |
4030 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, | |
1da177e4 | 4031 | sizeof(stateid_t)); |
b8dd7b9a | 4032 | status = 0; |
eb76b3fd AA |
4033 | break; |
4034 | case (EAGAIN): /* conflock holds conflicting lock */ | |
4035 | status = nfserr_denied; | |
4036 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
4037 | nfs4_set_lock_denied(&conflock, &lock->lk_denied); | |
4038 | break; | |
1da177e4 LT |
4039 | case (EDEADLK): |
4040 | status = nfserr_deadlock; | |
eb76b3fd | 4041 | break; |
3e772463 | 4042 | default: |
fd85b817 | 4043 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 4044 | status = nfserrno(err); |
eb76b3fd | 4045 | break; |
1da177e4 | 4046 | } |
1da177e4 | 4047 | out: |
8a280510 | 4048 | if (status && lock->lk_is_new && lock_sop) |
f044ff83 | 4049 | release_lockowner(lock_sop); |
5ec094c1 BF |
4050 | if (!cstate->replay_owner) |
4051 | nfs4_unlock_state(); | |
1da177e4 LT |
4052 | return status; |
4053 | } | |
4054 | ||
55ef1274 BF |
4055 | /* |
4056 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
4057 | * so we do a temporary open here just to get an open file to pass to | |
4058 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
4059 | * inode operation.) | |
4060 | */ | |
4061 | static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) | |
4062 | { | |
4063 | struct file *file; | |
4064 | int err; | |
4065 | ||
4066 | err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); | |
4067 | if (err) | |
4068 | return err; | |
4069 | err = vfs_test_lock(file, lock); | |
4070 | nfsd_close(file); | |
4071 | return err; | |
4072 | } | |
4073 | ||
1da177e4 LT |
4074 | /* |
4075 | * LOCKT operation | |
4076 | */ | |
b37ad28b | 4077 | __be32 |
ca364317 BF |
4078 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4079 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
4080 | { |
4081 | struct inode *inode; | |
1da177e4 | 4082 | struct file_lock file_lock; |
fe0750e5 | 4083 | struct nfs4_lockowner *lo; |
fd85b817 | 4084 | int error; |
b37ad28b | 4085 | __be32 status; |
1da177e4 | 4086 | |
af558e33 | 4087 | if (locks_in_grace()) |
1da177e4 LT |
4088 | return nfserr_grace; |
4089 | ||
4090 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
4091 | return nfserr_inval; | |
4092 | ||
1da177e4 LT |
4093 | nfs4_lock_state(); |
4094 | ||
4095 | status = nfserr_stale_clientid; | |
60adfc50 | 4096 | if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) |
1da177e4 | 4097 | goto out; |
1da177e4 | 4098 | |
75c096f7 | 4099 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 4100 | goto out; |
1da177e4 | 4101 | |
ca364317 | 4102 | inode = cstate->current_fh.fh_dentry->d_inode; |
1da177e4 LT |
4103 | locks_init_lock(&file_lock); |
4104 | switch (lockt->lt_type) { | |
4105 | case NFS4_READ_LT: | |
4106 | case NFS4_READW_LT: | |
4107 | file_lock.fl_type = F_RDLCK; | |
4108 | break; | |
4109 | case NFS4_WRITE_LT: | |
4110 | case NFS4_WRITEW_LT: | |
4111 | file_lock.fl_type = F_WRLCK; | |
4112 | break; | |
4113 | default: | |
2fdada03 | 4114 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
4115 | status = nfserr_inval; |
4116 | goto out; | |
4117 | } | |
4118 | ||
fe0750e5 BF |
4119 | lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner); |
4120 | if (lo) | |
4121 | file_lock.fl_owner = (fl_owner_t)lo; | |
1da177e4 LT |
4122 | file_lock.fl_pid = current->tgid; |
4123 | file_lock.fl_flags = FL_POSIX; | |
4124 | ||
4125 | file_lock.fl_start = lockt->lt_offset; | |
87df4de8 | 4126 | file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); |
1da177e4 LT |
4127 | |
4128 | nfs4_transform_lock_offset(&file_lock); | |
4129 | ||
1da177e4 | 4130 | status = nfs_ok; |
55ef1274 | 4131 | error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); |
fd85b817 ME |
4132 | if (error) { |
4133 | status = nfserrno(error); | |
4134 | goto out; | |
4135 | } | |
9d6a8c5c | 4136 | if (file_lock.fl_type != F_UNLCK) { |
1da177e4 | 4137 | status = nfserr_denied; |
9d6a8c5c | 4138 | nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); |
1da177e4 LT |
4139 | } |
4140 | out: | |
4141 | nfs4_unlock_state(); | |
4142 | return status; | |
4143 | } | |
4144 | ||
b37ad28b | 4145 | __be32 |
ca364317 | 4146 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4147 | struct nfsd4_locku *locku) |
1da177e4 | 4148 | { |
dcef0413 | 4149 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
4150 | struct file *filp = NULL; |
4151 | struct file_lock file_lock; | |
b37ad28b | 4152 | __be32 status; |
b8dd7b9a | 4153 | int err; |
1da177e4 LT |
4154 | |
4155 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", | |
4156 | (long long) locku->lu_offset, | |
4157 | (long long) locku->lu_length); | |
4158 | ||
4159 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
4160 | return nfserr_inval; | |
4161 | ||
4162 | nfs4_lock_state(); | |
4163 | ||
9072d5c6 | 4164 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
2288d0e3 | 4165 | &locku->lu_stateid, NFS4_LOCK_STID, &stp); |
9072d5c6 | 4166 | if (status) |
1da177e4 | 4167 | goto out; |
f9d7562f BF |
4168 | filp = find_any_file(stp->st_file); |
4169 | if (!filp) { | |
4170 | status = nfserr_lock_range; | |
4171 | goto out; | |
4172 | } | |
1da177e4 LT |
4173 | BUG_ON(!filp); |
4174 | locks_init_lock(&file_lock); | |
4175 | file_lock.fl_type = F_UNLCK; | |
fe0750e5 | 4176 | file_lock.fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); |
1da177e4 LT |
4177 | file_lock.fl_pid = current->tgid; |
4178 | file_lock.fl_file = filp; | |
4179 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 4180 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
4181 | file_lock.fl_start = locku->lu_offset; |
4182 | ||
87df4de8 | 4183 | file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); |
1da177e4 LT |
4184 | nfs4_transform_lock_offset(&file_lock); |
4185 | ||
4186 | /* | |
4187 | * Try to unlock the file in the VFS. | |
4188 | */ | |
fd85b817 | 4189 | err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); |
b8dd7b9a | 4190 | if (err) { |
fd85b817 | 4191 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
4192 | goto out_nfserr; |
4193 | } | |
4194 | /* | |
4195 | * OK, unlock succeeded; the only thing left to do is update the stateid. | |
4196 | */ | |
dcef0413 BF |
4197 | update_stateid(&stp->st_stid.sc_stateid); |
4198 | memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
4199 | |
4200 | out: | |
1da177e4 LT |
4201 | nfs4_unlock_state(); |
4202 | return status; | |
4203 | ||
4204 | out_nfserr: | |
b8dd7b9a | 4205 | status = nfserrno(err); |
1da177e4 LT |
4206 | goto out; |
4207 | } | |
4208 | ||
4209 | /* | |
4210 | * returns | |
4211 | * 1: locks held by lockowner | |
4212 | * 0: no locks held by lockowner | |
4213 | */ | |
4214 | static int | |
fe0750e5 | 4215 | check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner) |
1da177e4 LT |
4216 | { |
4217 | struct file_lock **flpp; | |
f9d7562f | 4218 | struct inode *inode = filp->fi_inode; |
1da177e4 LT |
4219 | int status = 0; |
4220 | ||
b89f4321 | 4221 | lock_flocks(); |
1da177e4 | 4222 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
796dadfd | 4223 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
4224 | status = 1; |
4225 | goto out; | |
796dadfd | 4226 | } |
1da177e4 LT |
4227 | } |
4228 | out: | |
b89f4321 | 4229 | unlock_flocks(); |
1da177e4 LT |
4230 | return status; |
4231 | } | |
4232 | ||
b37ad28b | 4233 | __be32 |
b591480b BF |
4234 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
4235 | struct nfsd4_compound_state *cstate, | |
4236 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
4237 | { |
4238 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe | 4239 | struct nfs4_stateowner *sop; |
fe0750e5 | 4240 | struct nfs4_lockowner *lo; |
dcef0413 | 4241 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4242 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe N |
4243 | struct list_head matches; |
4244 | int i; | |
b37ad28b | 4245 | __be32 status; |
1da177e4 LT |
4246 | |
4247 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
4248 | clid->cl_boot, clid->cl_id); | |
4249 | ||
4250 | /* XXX check for lease expiration */ | |
4251 | ||
4252 | status = nfserr_stale_clientid; | |
849823c5 | 4253 | if (STALE_CLIENTID(clid)) |
1da177e4 | 4254 | return status; |
1da177e4 LT |
4255 | |
4256 | nfs4_lock_state(); | |
4257 | ||
3e9e3dbe N |
4258 | status = nfserr_locks_held; |
4259 | /* XXX: we're doing a linear search through all the lockowners. | |
4260 | * Yipes! For now we'll just hope clients aren't really using | |
4261 | * release_lockowner much, but eventually we have to fix these | |
4262 | * data structures. */ | |
4263 | INIT_LIST_HEAD(&matches); | |
4264 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
d3b313a4 | 4265 | list_for_each_entry(sop, &lock_ownerstr_hashtbl[i], so_strhash) { |
599e0a22 | 4266 | if (!same_owner_str(sop, owner, clid)) |
3e9e3dbe N |
4267 | continue; |
4268 | list_for_each_entry(stp, &sop->so_stateids, | |
4269 | st_perstateowner) { | |
fe0750e5 BF |
4270 | lo = lockowner(sop); |
4271 | if (check_for_locks(stp->st_file, lo)) | |
3e9e3dbe | 4272 | goto out; |
fe0750e5 | 4273 | list_add(&lo->lo_list, &matches); |
3e9e3dbe | 4274 | } |
1da177e4 | 4275 | } |
3e9e3dbe N |
4276 | } |
4277 | /* Clients probably won't expect us to return with some (but not all) | |
4278 | * of the lockowner state released; so don't release any until all | |
4279 | * have been checked. */ | |
4280 | status = nfs_ok; | |
0fa822e4 | 4281 | while (!list_empty(&matches)) { |
fe0750e5 BF |
4282 | lo = list_entry(matches.next, struct nfs4_lockowner, |
4283 | lo_list); | |
0fa822e4 N |
4284 | /* unhash_stateowner deletes so_perclient only |
4285 | * for openowners. */ | |
fe0750e5 BF |
4286 | list_del(&lo->lo_list); |
4287 | release_lockowner(lo); | |
1da177e4 LT |
4288 | } |
4289 | out: | |
4290 | nfs4_unlock_state(); | |
4291 | return status; | |
4292 | } | |
4293 | ||
4294 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 4295 | alloc_reclaim(void) |
1da177e4 | 4296 | { |
a55370a3 | 4297 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
4298 | } |
4299 | ||
c7b9a459 | 4300 | int |
a1bcecd2 | 4301 | nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) |
c7b9a459 N |
4302 | { |
4303 | unsigned int strhashval = clientstr_hashval(name); | |
4304 | struct nfs4_client *clp; | |
4305 | ||
e203d506 | 4306 | clp = find_confirmed_client_by_str(name, strhashval); |
c7b9a459 N |
4307 | return clp ? 1 : 0; |
4308 | } | |
4309 | ||
1da177e4 LT |
4310 | /* |
4311 | * failure => all reset bets are off, nfserr_no_grace... | |
4312 | */ | |
190e4fbf N |
4313 | int |
4314 | nfs4_client_to_reclaim(const char *name) | |
1da177e4 LT |
4315 | { |
4316 | unsigned int strhashval; | |
4317 | struct nfs4_client_reclaim *crp = NULL; | |
4318 | ||
a55370a3 N |
4319 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
4320 | crp = alloc_reclaim(); | |
1da177e4 LT |
4321 | if (!crp) |
4322 | return 0; | |
a55370a3 | 4323 | strhashval = clientstr_hashval(name); |
1da177e4 LT |
4324 | INIT_LIST_HEAD(&crp->cr_strhash); |
4325 | list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); | |
a55370a3 | 4326 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
1da177e4 LT |
4327 | reclaim_str_hashtbl_size++; |
4328 | return 1; | |
4329 | } | |
4330 | ||
4331 | static void | |
4332 | nfs4_release_reclaim(void) | |
4333 | { | |
4334 | struct nfs4_client_reclaim *crp = NULL; | |
4335 | int i; | |
4336 | ||
1da177e4 LT |
4337 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4338 | while (!list_empty(&reclaim_str_hashtbl[i])) { | |
4339 | crp = list_entry(reclaim_str_hashtbl[i].next, | |
4340 | struct nfs4_client_reclaim, cr_strhash); | |
4341 | list_del(&crp->cr_strhash); | |
1da177e4 LT |
4342 | kfree(crp); |
4343 | reclaim_str_hashtbl_size--; | |
4344 | } | |
4345 | } | |
4346 | BUG_ON(reclaim_str_hashtbl_size); | |
4347 | } | |
4348 | ||
4349 | /* | |
4350 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
fd39ca9a | 4351 | static struct nfs4_client_reclaim * |
1da177e4 LT |
4352 | nfs4_find_reclaim_client(clientid_t *clid) |
4353 | { | |
4354 | unsigned int strhashval; | |
4355 | struct nfs4_client *clp; | |
4356 | struct nfs4_client_reclaim *crp = NULL; | |
4357 | ||
4358 | ||
4359 | /* find clientid in conf_id_hashtbl */ | |
4360 | clp = find_confirmed_client(clid); | |
4361 | if (clp == NULL) | |
4362 | return NULL; | |
4363 | ||
a55370a3 N |
4364 | dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", |
4365 | clp->cl_name.len, clp->cl_name.data, | |
4366 | clp->cl_recdir); | |
1da177e4 LT |
4367 | |
4368 | /* find clp->cl_name in reclaim_str_hashtbl */ | |
a55370a3 | 4369 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 | 4370 | list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { |
a55370a3 | 4371 | if (same_name(crp->cr_recdir, clp->cl_recdir)) { |
1da177e4 LT |
4372 | return crp; |
4373 | } | |
4374 | } | |
4375 | return NULL; | |
4376 | } | |
4377 | ||
4378 | /* | |
4379 | * Called from OPEN. Look for clientid in reclaim list. | |
4380 | */ | |
b37ad28b | 4381 | __be32 |
1da177e4 LT |
4382 | nfs4_check_open_reclaim(clientid_t *clid) |
4383 | { | |
dfc83565 | 4384 | return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; |
1da177e4 LT |
4385 | } |
4386 | ||
ac4d8ff2 | 4387 | /* initialization to perform at module load time: */ |
1da177e4 | 4388 | |
e8ff2a84 | 4389 | int |
ac4d8ff2 | 4390 | nfs4_state_init(void) |
1da177e4 | 4391 | { |
e8ff2a84 | 4392 | int i, status; |
1da177e4 | 4393 | |
e8ff2a84 BF |
4394 | status = nfsd4_init_slabs(); |
4395 | if (status) | |
4396 | return status; | |
1da177e4 LT |
4397 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4398 | INIT_LIST_HEAD(&conf_id_hashtbl[i]); | |
4399 | INIT_LIST_HEAD(&conf_str_hashtbl[i]); | |
4400 | INIT_LIST_HEAD(&unconf_str_hashtbl[i]); | |
4401 | INIT_LIST_HEAD(&unconf_id_hashtbl[i]); | |
02cb2858 | 4402 | INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); |
1da177e4 | 4403 | } |
5282fd72 ME |
4404 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
4405 | INIT_LIST_HEAD(&sessionid_hashtbl[i]); | |
1da177e4 LT |
4406 | for (i = 0; i < FILE_HASH_SIZE; i++) { |
4407 | INIT_LIST_HEAD(&file_hashtbl[i]); | |
4408 | } | |
506f275f BF |
4409 | for (i = 0; i < OPEN_OWNER_HASH_SIZE; i++) { |
4410 | INIT_LIST_HEAD(&open_ownerstr_hashtbl[i]); | |
1da177e4 | 4411 | } |
6136d2b4 | 4412 | idr_init(&stateids); |
1da177e4 | 4413 | for (i = 0; i < LOCK_HASH_SIZE; i++) { |
1da177e4 LT |
4414 | INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); |
4415 | } | |
1da177e4 | 4416 | memset(&onestateid, ~0, sizeof(stateid_t)); |
1da177e4 LT |
4417 | INIT_LIST_HEAD(&close_lru); |
4418 | INIT_LIST_HEAD(&client_lru); | |
4419 | INIT_LIST_HEAD(&del_recall_lru); | |
ac4d8ff2 | 4420 | reclaim_str_hashtbl_size = 0; |
e8ff2a84 | 4421 | return 0; |
ac4d8ff2 N |
4422 | } |
4423 | ||
190e4fbf N |
4424 | static void |
4425 | nfsd4_load_reboot_recovery_data(void) | |
4426 | { | |
4427 | int status; | |
4428 | ||
0964a3d3 | 4429 | nfs4_lock_state(); |
48483bf2 | 4430 | nfsd4_init_recdir(); |
190e4fbf | 4431 | status = nfsd4_recdir_load(); |
0964a3d3 | 4432 | nfs4_unlock_state(); |
190e4fbf N |
4433 | if (status) |
4434 | printk("NFSD: Failure reading reboot recovery data\n"); | |
4435 | } | |
4436 | ||
c2f1a551 MS |
4437 | /* |
4438 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
4439 | * client may quite reasonably hang on to a delegation as long as it has | |
4440 | * the inode cached. This becomes an obvious problem the first time a | |
4441 | * client's inode cache approaches the size of the server's total memory. | |
4442 | * | |
4443 | * For now we avoid this problem by imposing a hard limit on the number | |
4444 | * of delegations, which varies according to the server's memory size. | |
4445 | */ | |
4446 | static void | |
4447 | set_max_delegations(void) | |
4448 | { | |
4449 | /* | |
4450 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
4451 | * estimates suggest that in the worst case (where every delegation | |
4452 | * is for a different inode), a delegation could take about 1.5K, | |
4453 | * giving a worst case usage of about 6% of memory. | |
4454 | */ | |
4455 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
4456 | } | |
4457 | ||
ac4d8ff2 N |
4458 | /* initialization to perform when the nfsd service is started: */ |
4459 | ||
29ab23cc | 4460 | static int |
ac4d8ff2 N |
4461 | __nfs4_state_start(void) |
4462 | { | |
b5a1a81e BF |
4463 | int ret; |
4464 | ||
1da177e4 | 4465 | boot_time = get_seconds(); |
af558e33 | 4466 | locks_start_grace(&nfsd4_manager); |
9a8db97e | 4467 | printk(KERN_INFO "NFSD: starting %ld-second grace period\n", |
e46b498c | 4468 | nfsd4_grace); |
b5a1a81e BF |
4469 | ret = set_callback_cred(); |
4470 | if (ret) | |
4471 | return -ENOMEM; | |
58da282b | 4472 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
29ab23cc BF |
4473 | if (laundry_wq == NULL) |
4474 | return -ENOMEM; | |
b5a1a81e BF |
4475 | ret = nfsd4_create_callback_queue(); |
4476 | if (ret) | |
4477 | goto out_free_laundry; | |
e46b498c | 4478 | queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); |
c2f1a551 | 4479 | set_max_delegations(); |
b5a1a81e BF |
4480 | return 0; |
4481 | out_free_laundry: | |
4482 | destroy_workqueue(laundry_wq); | |
4483 | return ret; | |
1da177e4 LT |
4484 | } |
4485 | ||
29ab23cc | 4486 | int |
76a3550e | 4487 | nfs4_state_start(void) |
1da177e4 | 4488 | { |
190e4fbf | 4489 | nfsd4_load_reboot_recovery_data(); |
4ad9a344 | 4490 | return __nfs4_state_start(); |
1da177e4 LT |
4491 | } |
4492 | ||
1da177e4 LT |
4493 | static void |
4494 | __nfs4_state_shutdown(void) | |
4495 | { | |
4496 | int i; | |
4497 | struct nfs4_client *clp = NULL; | |
4498 | struct nfs4_delegation *dp = NULL; | |
1da177e4 LT |
4499 | struct list_head *pos, *next, reaplist; |
4500 | ||
1da177e4 LT |
4501 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4502 | while (!list_empty(&conf_id_hashtbl[i])) { | |
4503 | clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
4504 | expire_client(clp); | |
4505 | } | |
4506 | while (!list_empty(&unconf_str_hashtbl[i])) { | |
4507 | clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); | |
4508 | expire_client(clp); | |
4509 | } | |
4510 | } | |
4511 | INIT_LIST_HEAD(&reaplist); | |
4512 | spin_lock(&recall_lock); | |
4513 | list_for_each_safe(pos, next, &del_recall_lru) { | |
4514 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4515 | list_move(&dp->dl_recall_lru, &reaplist); | |
4516 | } | |
4517 | spin_unlock(&recall_lock); | |
4518 | list_for_each_safe(pos, next, &reaplist) { | |
4519 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4520 | list_del_init(&dp->dl_recall_lru); | |
4521 | unhash_delegation(dp); | |
4522 | } | |
4523 | ||
190e4fbf | 4524 | nfsd4_shutdown_recdir(); |
1da177e4 LT |
4525 | } |
4526 | ||
4527 | void | |
4528 | nfs4_state_shutdown(void) | |
4529 | { | |
afe2c511 | 4530 | cancel_delayed_work_sync(&laundromat_work); |
5e8d5c29 | 4531 | destroy_workqueue(laundry_wq); |
2c5e7615 | 4532 | locks_end_grace(&nfsd4_manager); |
1da177e4 LT |
4533 | nfs4_lock_state(); |
4534 | nfs4_release_reclaim(); | |
4535 | __nfs4_state_shutdown(); | |
1da177e4 | 4536 | nfs4_unlock_state(); |
c3935e30 | 4537 | nfsd4_destroy_callback_queue(); |
1da177e4 | 4538 | } |