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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (c) 2001 The Regents of the University of Michigan. |
3 | * All rights reserved. | |
4 | * | |
5 | * Kendrick Smith <kmsmith@umich.edu> | |
6 | * Andy Adamson <kandros@umich.edu> | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * | |
12 | * 1. Redistributions of source code must retain the above copyright | |
13 | * notice, this list of conditions and the following disclaimer. | |
14 | * 2. Redistributions in binary form must reproduce the above copyright | |
15 | * notice, this list of conditions and the following disclaimer in the | |
16 | * documentation and/or other materials provided with the distribution. | |
17 | * 3. Neither the name of the University nor the names of its | |
18 | * contributors may be used to endorse or promote products derived | |
19 | * from this software without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
22 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
23 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
24 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
26 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
27 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
28 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
29 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
30 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
31 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
32 | * | |
33 | */ | |
34 | ||
aceaf78d | 35 | #include <linux/file.h> |
b89f4321 | 36 | #include <linux/fs.h> |
5a0e3ad6 | 37 | #include <linux/slab.h> |
0964a3d3 | 38 | #include <linux/namei.h> |
c2f1a551 | 39 | #include <linux/swap.h> |
17456804 | 40 | #include <linux/pagemap.h> |
68e76ad0 | 41 | #include <linux/sunrpc/svcauth_gss.h> |
363168b4 | 42 | #include <linux/sunrpc/clnt.h> |
9a74af21 | 43 | #include "xdr4.h" |
0a3adade | 44 | #include "vfs.h" |
1da177e4 LT |
45 | |
46 | #define NFSDDBG_FACILITY NFSDDBG_PROC | |
47 | ||
48 | /* Globals */ | |
cf07d2ea | 49 | time_t nfsd4_lease = 90; /* default lease time */ |
efc4bb4f | 50 | time_t nfsd4_grace = 90; |
fd39ca9a | 51 | static time_t boot_time; |
1da177e4 LT |
52 | static u32 current_ownerid = 1; |
53 | static u32 current_fileid = 1; | |
54 | static u32 current_delegid = 1; | |
fd39ca9a N |
55 | static stateid_t zerostateid; /* bits all 0 */ |
56 | static stateid_t onestateid; /* bits all 1 */ | |
ec6b5d7b | 57 | static u64 current_sessionid = 1; |
fd39ca9a N |
58 | |
59 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t))) | |
60 | #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t))) | |
1da177e4 | 61 | |
1da177e4 | 62 | /* forward declarations */ |
fe0750e5 | 63 | static int check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner); |
1da177e4 | 64 | |
8b671b80 BF |
65 | /* Locking: */ |
66 | ||
67 | /* Currently used for almost all code touching nfsv4 state: */ | |
353ab6e9 | 68 | static DEFINE_MUTEX(client_mutex); |
1da177e4 | 69 | |
8b671b80 BF |
70 | /* |
71 | * Currently used for the del_recall_lru and file hash table. In an | |
72 | * effort to decrease the scope of the client_mutex, this spinlock may | |
73 | * eventually cover more: | |
74 | */ | |
75 | static DEFINE_SPINLOCK(recall_lock); | |
76 | ||
fe0750e5 BF |
77 | static struct kmem_cache *openowner_slab = NULL; |
78 | static struct kmem_cache *lockowner_slab = NULL; | |
e18b890b CL |
79 | static struct kmem_cache *file_slab = NULL; |
80 | static struct kmem_cache *stateid_slab = NULL; | |
81 | static struct kmem_cache *deleg_slab = NULL; | |
e60d4398 | 82 | |
1da177e4 LT |
83 | void |
84 | nfs4_lock_state(void) | |
85 | { | |
353ab6e9 | 86 | mutex_lock(&client_mutex); |
1da177e4 LT |
87 | } |
88 | ||
89 | void | |
90 | nfs4_unlock_state(void) | |
91 | { | |
353ab6e9 | 92 | mutex_unlock(&client_mutex); |
1da177e4 LT |
93 | } |
94 | ||
95 | static inline u32 | |
96 | opaque_hashval(const void *ptr, int nbytes) | |
97 | { | |
98 | unsigned char *cptr = (unsigned char *) ptr; | |
99 | ||
100 | u32 x = 0; | |
101 | while (nbytes--) { | |
102 | x *= 37; | |
103 | x += *cptr++; | |
104 | } | |
105 | return x; | |
106 | } | |
107 | ||
1da177e4 LT |
108 | static struct list_head del_recall_lru; |
109 | ||
13cd2184 N |
110 | static inline void |
111 | put_nfs4_file(struct nfs4_file *fi) | |
112 | { | |
8b671b80 BF |
113 | if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { |
114 | list_del(&fi->fi_hash); | |
115 | spin_unlock(&recall_lock); | |
116 | iput(fi->fi_inode); | |
117 | kmem_cache_free(file_slab, fi); | |
118 | } | |
13cd2184 N |
119 | } |
120 | ||
121 | static inline void | |
122 | get_nfs4_file(struct nfs4_file *fi) | |
123 | { | |
8b671b80 | 124 | atomic_inc(&fi->fi_ref); |
13cd2184 N |
125 | } |
126 | ||
ef0f3390 | 127 | static int num_delegations; |
c2f1a551 | 128 | unsigned int max_delegations; |
ef0f3390 N |
129 | |
130 | /* | |
131 | * Open owner state (share locks) | |
132 | */ | |
133 | ||
506f275f BF |
134 | /* hash tables for open owners */ |
135 | #define OPEN_OWNER_HASH_BITS 8 | |
136 | #define OPEN_OWNER_HASH_SIZE (1 << OPEN_OWNER_HASH_BITS) | |
137 | #define OPEN_OWNER_HASH_MASK (OPEN_OWNER_HASH_SIZE - 1) | |
ef0f3390 | 138 | |
506f275f | 139 | static unsigned int open_ownerid_hashval(const u32 id) |
ddc04c41 | 140 | { |
506f275f | 141 | return id & OPEN_OWNER_HASH_MASK; |
ddc04c41 BF |
142 | } |
143 | ||
506f275f | 144 | static unsigned int open_ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername) |
ddc04c41 BF |
145 | { |
146 | unsigned int ret; | |
147 | ||
148 | ret = opaque_hashval(ownername->data, ownername->len); | |
149 | ret += clientid; | |
506f275f | 150 | return ret & OPEN_OWNER_HASH_MASK; |
ddc04c41 | 151 | } |
ef0f3390 | 152 | |
506f275f BF |
153 | static struct list_head open_ownerid_hashtbl[OPEN_OWNER_HASH_SIZE]; |
154 | static struct list_head open_ownerstr_hashtbl[OPEN_OWNER_HASH_SIZE]; | |
ef0f3390 N |
155 | |
156 | /* hash table for nfs4_file */ | |
157 | #define FILE_HASH_BITS 8 | |
158 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
35079582 | 159 | |
dcef0413 | 160 | /* hash table for (open)nfs4_ol_stateid */ |
ef0f3390 N |
161 | #define STATEID_HASH_BITS 10 |
162 | #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS) | |
163 | #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1) | |
164 | ||
ddc04c41 BF |
165 | static unsigned int file_hashval(struct inode *ino) |
166 | { | |
167 | /* XXX: why are we hashing on inode pointer, anyway? */ | |
168 | return hash_ptr(ino, FILE_HASH_BITS); | |
169 | } | |
170 | ||
ee626a77 | 171 | static unsigned int stateid_hashval(stateid_t *s) |
ddc04c41 | 172 | { |
ee626a77 | 173 | return opaque_hashval(&s->si_opaque, sizeof(stateid_opaque_t)) & STATEID_HASH_MASK; |
ddc04c41 | 174 | } |
ef0f3390 N |
175 | |
176 | static struct list_head file_hashtbl[FILE_HASH_SIZE]; | |
177 | static struct list_head stateid_hashtbl[STATEID_HASH_SIZE]; | |
178 | ||
998db52c | 179 | static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
f9d7562f BF |
180 | { |
181 | BUG_ON(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR])); | |
182 | atomic_inc(&fp->fi_access[oflag]); | |
183 | } | |
184 | ||
998db52c BF |
185 | static void nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
186 | { | |
187 | if (oflag == O_RDWR) { | |
188 | __nfs4_file_get_access(fp, O_RDONLY); | |
189 | __nfs4_file_get_access(fp, O_WRONLY); | |
190 | } else | |
191 | __nfs4_file_get_access(fp, oflag); | |
192 | } | |
193 | ||
194 | static void nfs4_file_put_fd(struct nfs4_file *fp, int oflag) | |
f9d7562f BF |
195 | { |
196 | if (fp->fi_fds[oflag]) { | |
197 | fput(fp->fi_fds[oflag]); | |
198 | fp->fi_fds[oflag] = NULL; | |
199 | } | |
200 | } | |
201 | ||
998db52c | 202 | static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
f9d7562f BF |
203 | { |
204 | if (atomic_dec_and_test(&fp->fi_access[oflag])) { | |
205 | nfs4_file_put_fd(fp, O_RDWR); | |
206 | nfs4_file_put_fd(fp, oflag); | |
207 | } | |
208 | } | |
209 | ||
998db52c BF |
210 | static void nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
211 | { | |
212 | if (oflag == O_RDWR) { | |
213 | __nfs4_file_put_access(fp, O_RDONLY); | |
214 | __nfs4_file_put_access(fp, O_WRONLY); | |
215 | } else | |
216 | __nfs4_file_put_access(fp, oflag); | |
217 | } | |
218 | ||
36d44c60 BF |
219 | static inline void hash_stid(struct nfs4_stid *stid) |
220 | { | |
221 | stateid_t *s = &stid->sc_stateid; | |
222 | unsigned int hashval; | |
223 | ||
ee626a77 | 224 | hashval = stateid_hashval(s); |
36d44c60 BF |
225 | list_add(&stid->sc_hash, &stateid_hashtbl[hashval]); |
226 | } | |
227 | ||
1da177e4 | 228 | static struct nfs4_delegation * |
dcef0413 | 229 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_ol_stateid *stp, struct svc_fh *current_fh, u32 type) |
1da177e4 LT |
230 | { |
231 | struct nfs4_delegation *dp; | |
232 | struct nfs4_file *fp = stp->st_file; | |
1da177e4 LT |
233 | |
234 | dprintk("NFSD alloc_init_deleg\n"); | |
c3e48080 BF |
235 | /* |
236 | * Major work on the lease subsystem (for example, to support | |
237 | * calbacks on stat) will be required before we can support | |
238 | * write delegations properly. | |
239 | */ | |
240 | if (type != NFS4_OPEN_DELEGATE_READ) | |
241 | return NULL; | |
47f9940c MS |
242 | if (fp->fi_had_conflict) |
243 | return NULL; | |
c2f1a551 | 244 | if (num_delegations > max_delegations) |
ef0f3390 | 245 | return NULL; |
5b2d21c1 N |
246 | dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); |
247 | if (dp == NULL) | |
1da177e4 | 248 | return dp; |
ef0f3390 | 249 | num_delegations++; |
ea1da636 N |
250 | INIT_LIST_HEAD(&dp->dl_perfile); |
251 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 LT |
252 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
253 | dp->dl_client = clp; | |
13cd2184 | 254 | get_nfs4_file(fp); |
1da177e4 | 255 | dp->dl_file = fp; |
1da177e4 | 256 | dp->dl_type = type; |
f459e453 | 257 | dp->dl_stid.sc_type = NFS4_DELEG_STID; |
d5477a8d BF |
258 | dp->dl_stid.sc_stateid.si_boot = boot_time; |
259 | dp->dl_stid.sc_stateid.si_stateownerid = current_delegid++; | |
260 | dp->dl_stid.sc_stateid.si_fileid = 0; | |
261 | dp->dl_stid.sc_stateid.si_generation = 1; | |
f459e453 | 262 | hash_stid(&dp->dl_stid); |
6c02eaa1 | 263 | fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); |
1da177e4 LT |
264 | dp->dl_time = 0; |
265 | atomic_set(&dp->dl_count, 1); | |
b5a1a81e | 266 | INIT_WORK(&dp->dl_recall.cb_work, nfsd4_do_callback_rpc); |
1da177e4 LT |
267 | return dp; |
268 | } | |
269 | ||
270 | void | |
271 | nfs4_put_delegation(struct nfs4_delegation *dp) | |
272 | { | |
273 | if (atomic_dec_and_test(&dp->dl_count)) { | |
274 | dprintk("NFSD: freeing dp %p\n",dp); | |
13cd2184 | 275 | put_nfs4_file(dp->dl_file); |
5b2d21c1 | 276 | kmem_cache_free(deleg_slab, dp); |
ef0f3390 | 277 | num_delegations--; |
1da177e4 LT |
278 | } |
279 | } | |
280 | ||
acfdf5c3 | 281 | static void nfs4_put_deleg_lease(struct nfs4_file *fp) |
1da177e4 | 282 | { |
acfdf5c3 BF |
283 | if (atomic_dec_and_test(&fp->fi_delegees)) { |
284 | vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); | |
285 | fp->fi_lease = NULL; | |
4ee63624 | 286 | fput(fp->fi_deleg_file); |
acfdf5c3 BF |
287 | fp->fi_deleg_file = NULL; |
288 | } | |
1da177e4 LT |
289 | } |
290 | ||
291 | /* Called under the state lock. */ | |
292 | static void | |
293 | unhash_delegation(struct nfs4_delegation *dp) | |
294 | { | |
f459e453 | 295 | list_del_init(&dp->dl_stid.sc_hash); |
ea1da636 | 296 | list_del_init(&dp->dl_perclnt); |
1da177e4 | 297 | spin_lock(&recall_lock); |
5d926e8c | 298 | list_del_init(&dp->dl_perfile); |
1da177e4 LT |
299 | list_del_init(&dp->dl_recall_lru); |
300 | spin_unlock(&recall_lock); | |
acfdf5c3 | 301 | nfs4_put_deleg_lease(dp->dl_file); |
1da177e4 LT |
302 | nfs4_put_delegation(dp); |
303 | } | |
304 | ||
305 | /* | |
306 | * SETCLIENTID state | |
307 | */ | |
308 | ||
36acb66b | 309 | /* client_lock protects the client lru list and session hash table */ |
9089f1b4 BH |
310 | static DEFINE_SPINLOCK(client_lock); |
311 | ||
1da177e4 LT |
312 | /* Hash tables for nfs4_clientid state */ |
313 | #define CLIENT_HASH_BITS 4 | |
314 | #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) | |
315 | #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) | |
316 | ||
ddc04c41 BF |
317 | static unsigned int clientid_hashval(u32 id) |
318 | { | |
319 | return id & CLIENT_HASH_MASK; | |
320 | } | |
321 | ||
322 | static unsigned int clientstr_hashval(const char *name) | |
323 | { | |
324 | return opaque_hashval(name, 8) & CLIENT_HASH_MASK; | |
325 | } | |
326 | ||
1da177e4 LT |
327 | /* |
328 | * reclaim_str_hashtbl[] holds known client info from previous reset/reboot | |
329 | * used in reboot/reset lease grace period processing | |
330 | * | |
331 | * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed | |
332 | * setclientid_confirmed info. | |
333 | * | |
334 | * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed | |
335 | * setclientid info. | |
336 | * | |
337 | * client_lru holds client queue ordered by nfs4_client.cl_time | |
338 | * for lease renewal. | |
339 | * | |
340 | * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time | |
341 | * for last close replay. | |
342 | */ | |
343 | static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; | |
344 | static int reclaim_str_hashtbl_size = 0; | |
345 | static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; | |
346 | static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; | |
347 | static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; | |
348 | static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; | |
349 | static struct list_head client_lru; | |
350 | static struct list_head close_lru; | |
351 | ||
f9d7562f BF |
352 | /* |
353 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
354 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
355 | * only what share bits are currently in force, but also what | |
356 | * combinations of share bits previous opens have used. This allows us | |
357 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
358 | * return an error if the client attempt to downgrade to a combination | |
359 | * of share bits not explicable by closing some of its previous opens. | |
360 | * | |
361 | * XXX: This enforcement is actually incomplete, since we don't keep | |
362 | * track of access/deny bit combinations; so, e.g., we allow: | |
363 | * | |
364 | * OPEN allow read, deny write | |
365 | * OPEN allow both, deny none | |
366 | * DOWNGRADE allow read, deny none | |
367 | * | |
368 | * which we should reject. | |
369 | */ | |
370 | static void | |
371 | set_access(unsigned int *access, unsigned long bmap) { | |
372 | int i; | |
373 | ||
374 | *access = 0; | |
375 | for (i = 1; i < 4; i++) { | |
376 | if (test_bit(i, &bmap)) | |
377 | *access |= i; | |
378 | } | |
379 | } | |
380 | ||
381 | static void | |
382 | set_deny(unsigned int *deny, unsigned long bmap) { | |
383 | int i; | |
384 | ||
385 | *deny = 0; | |
386 | for (i = 0; i < 4; i++) { | |
387 | if (test_bit(i, &bmap)) | |
388 | *deny |= i ; | |
389 | } | |
390 | } | |
391 | ||
392 | static int | |
dcef0413 | 393 | test_share(struct nfs4_ol_stateid *stp, struct nfsd4_open *open) { |
f9d7562f BF |
394 | unsigned int access, deny; |
395 | ||
396 | set_access(&access, stp->st_access_bmap); | |
397 | set_deny(&deny, stp->st_deny_bmap); | |
398 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) | |
399 | return 0; | |
400 | return 1; | |
401 | } | |
402 | ||
403 | static int nfs4_access_to_omode(u32 access) | |
404 | { | |
8f34a430 | 405 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
406 | case NFS4_SHARE_ACCESS_READ: |
407 | return O_RDONLY; | |
408 | case NFS4_SHARE_ACCESS_WRITE: | |
409 | return O_WRONLY; | |
410 | case NFS4_SHARE_ACCESS_BOTH: | |
411 | return O_RDWR; | |
412 | } | |
413 | BUG(); | |
414 | } | |
415 | ||
dcef0413 | 416 | static void unhash_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 417 | { |
dcef0413 | 418 | list_del(&stp->st_stid.sc_hash); |
529d7b2a BF |
419 | list_del(&stp->st_perfile); |
420 | list_del(&stp->st_perstateowner); | |
421 | } | |
422 | ||
dcef0413 | 423 | static void close_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 424 | { |
499f3edc | 425 | int i; |
0997b173 | 426 | |
23fcf2ec | 427 | if (stp->st_access_bmap) { |
499f3edc BF |
428 | for (i = 1; i < 4; i++) { |
429 | if (test_bit(i, &stp->st_access_bmap)) | |
430 | nfs4_file_put_access(stp->st_file, | |
431 | nfs4_access_to_omode(i)); | |
4665e2ba | 432 | __clear_bit(i, &stp->st_access_bmap); |
499f3edc | 433 | } |
23fcf2ec | 434 | } |
a96e5b90 | 435 | put_nfs4_file(stp->st_file); |
4665e2ba BF |
436 | stp->st_file = NULL; |
437 | } | |
438 | ||
dcef0413 | 439 | static void free_generic_stateid(struct nfs4_ol_stateid *stp) |
4665e2ba BF |
440 | { |
441 | close_generic_stateid(stp); | |
529d7b2a BF |
442 | kmem_cache_free(stateid_slab, stp); |
443 | } | |
444 | ||
dcef0413 | 445 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a BF |
446 | { |
447 | struct file *file; | |
448 | ||
449 | unhash_generic_stateid(stp); | |
450 | file = find_any_file(stp->st_file); | |
451 | if (file) | |
fe0750e5 | 452 | locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner)); |
529d7b2a BF |
453 | free_generic_stateid(stp); |
454 | } | |
455 | ||
fe0750e5 | 456 | static void unhash_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 457 | { |
dcef0413 | 458 | struct nfs4_ol_stateid *stp; |
529d7b2a | 459 | |
fe0750e5 BF |
460 | list_del(&lo->lo_owner.so_idhash); |
461 | list_del(&lo->lo_owner.so_strhash); | |
462 | list_del(&lo->lo_perstateid); | |
463 | while (!list_empty(&lo->lo_owner.so_stateids)) { | |
464 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
dcef0413 | 465 | struct nfs4_ol_stateid, st_perstateowner); |
529d7b2a BF |
466 | release_lock_stateid(stp); |
467 | } | |
468 | } | |
469 | ||
fe0750e5 | 470 | static void release_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 471 | { |
fe0750e5 BF |
472 | unhash_lockowner(lo); |
473 | nfs4_free_lockowner(lo); | |
529d7b2a BF |
474 | } |
475 | ||
476 | static void | |
dcef0413 | 477 | release_stateid_lockowners(struct nfs4_ol_stateid *open_stp) |
529d7b2a | 478 | { |
fe0750e5 | 479 | struct nfs4_lockowner *lo; |
529d7b2a BF |
480 | |
481 | while (!list_empty(&open_stp->st_lockowners)) { | |
fe0750e5 BF |
482 | lo = list_entry(open_stp->st_lockowners.next, |
483 | struct nfs4_lockowner, lo_perstateid); | |
484 | release_lockowner(lo); | |
529d7b2a BF |
485 | } |
486 | } | |
487 | ||
dcef0413 | 488 | static void release_open_stateid(struct nfs4_ol_stateid *stp) |
2283963f BF |
489 | { |
490 | unhash_generic_stateid(stp); | |
491 | release_stateid_lockowners(stp); | |
2283963f BF |
492 | free_generic_stateid(stp); |
493 | } | |
494 | ||
fe0750e5 | 495 | static void unhash_openowner(struct nfs4_openowner *oo) |
f1d110ca | 496 | { |
dcef0413 | 497 | struct nfs4_ol_stateid *stp; |
f1d110ca | 498 | |
fe0750e5 BF |
499 | list_del(&oo->oo_owner.so_idhash); |
500 | list_del(&oo->oo_owner.so_strhash); | |
501 | list_del(&oo->oo_perclient); | |
502 | while (!list_empty(&oo->oo_owner.so_stateids)) { | |
503 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
dcef0413 | 504 | struct nfs4_ol_stateid, st_perstateowner); |
f044ff83 | 505 | release_open_stateid(stp); |
f1d110ca BF |
506 | } |
507 | } | |
508 | ||
fe0750e5 | 509 | static void release_openowner(struct nfs4_openowner *oo) |
f1d110ca | 510 | { |
fe0750e5 BF |
511 | unhash_openowner(oo); |
512 | list_del(&oo->oo_close_lru); | |
513 | nfs4_free_openowner(oo); | |
f1d110ca BF |
514 | } |
515 | ||
5282fd72 ME |
516 | #define SESSION_HASH_SIZE 512 |
517 | static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; | |
518 | ||
519 | static inline int | |
520 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
521 | { | |
522 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
523 | ||
524 | return sid->sequence % SESSION_HASH_SIZE; | |
525 | } | |
526 | ||
527 | static inline void | |
528 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
529 | { | |
530 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
531 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
532 | } | |
533 | ||
ec6b5d7b AA |
534 | static void |
535 | gen_sessionid(struct nfsd4_session *ses) | |
536 | { | |
537 | struct nfs4_client *clp = ses->se_client; | |
538 | struct nfsd4_sessionid *sid; | |
539 | ||
540 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
541 | sid->clientid = clp->cl_clientid; | |
542 | sid->sequence = current_sessionid++; | |
543 | sid->reserved = 0; | |
544 | } | |
545 | ||
546 | /* | |
a649637c AA |
547 | * The protocol defines ca_maxresponssize_cached to include the size of |
548 | * the rpc header, but all we need to cache is the data starting after | |
549 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
550 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
551 | * value that is the number of bytes in our cache plus a few additional | |
552 | * bytes. In order to stay on the safe side, and not promise more than | |
553 | * we can cache, those additional bytes must be the minimum possible: 24 | |
554 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
555 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
556 | * for the SEQUENCE op response: | |
557 | */ | |
558 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
559 | ||
557ce264 AA |
560 | static void |
561 | free_session_slots(struct nfsd4_session *ses) | |
562 | { | |
563 | int i; | |
564 | ||
565 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
566 | kfree(ses->se_slots[i]); | |
567 | } | |
568 | ||
a649637c | 569 | /* |
efe0cb6d BF |
570 | * We don't actually need to cache the rpc and session headers, so we |
571 | * can allocate a little less for each slot: | |
572 | */ | |
573 | static inline int slot_bytes(struct nfsd4_channel_attrs *ca) | |
574 | { | |
575 | return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
576 | } | |
577 | ||
5b6feee9 | 578 | static int nfsd4_sanitize_slot_size(u32 size) |
ec6b5d7b | 579 | { |
5b6feee9 BF |
580 | size -= NFSD_MIN_HDR_SEQ_SZ; /* We don't cache the rpc header */ |
581 | size = min_t(u32, size, NFSD_SLOT_CACHE_SIZE); | |
ec6b5d7b | 582 | |
5b6feee9 BF |
583 | return size; |
584 | } | |
ec6b5d7b | 585 | |
5b6feee9 BF |
586 | /* |
587 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c AA |
588 | * re-negotiate active sessions and reduce their slot usage to make |
589 | * rooom for new connections. For now we just fail the create session. | |
ec6b5d7b | 590 | */ |
5b6feee9 | 591 | static int nfsd4_get_drc_mem(int slotsize, u32 num) |
ec6b5d7b | 592 | { |
5b6feee9 | 593 | int avail; |
ec6b5d7b | 594 | |
5b6feee9 | 595 | num = min_t(u32, num, NFSD_MAX_SLOTS_PER_SESSION); |
5d77ddfb | 596 | |
5b6feee9 BF |
597 | spin_lock(&nfsd_drc_lock); |
598 | avail = min_t(int, NFSD_MAX_MEM_PER_SESSION, | |
599 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
600 | num = min_t(int, num, avail / slotsize); | |
601 | nfsd_drc_mem_used += num * slotsize; | |
602 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 603 | |
5b6feee9 BF |
604 | return num; |
605 | } | |
ec6b5d7b | 606 | |
5b6feee9 BF |
607 | static void nfsd4_put_drc_mem(int slotsize, int num) |
608 | { | |
4bd9b0f4 | 609 | spin_lock(&nfsd_drc_lock); |
5b6feee9 | 610 | nfsd_drc_mem_used -= slotsize * num; |
4bd9b0f4 | 611 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 612 | } |
ec6b5d7b | 613 | |
5b6feee9 BF |
614 | static struct nfsd4_session *alloc_session(int slotsize, int numslots) |
615 | { | |
616 | struct nfsd4_session *new; | |
617 | int mem, i; | |
a649637c | 618 | |
5b6feee9 BF |
619 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
620 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
621 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 622 | |
5b6feee9 BF |
623 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
624 | if (!new) | |
625 | return NULL; | |
557ce264 | 626 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 BF |
627 | for (i = 0; i < numslots; i++) { |
628 | mem = sizeof(struct nfsd4_slot) + slotsize; | |
629 | new->se_slots[i] = kzalloc(mem, GFP_KERNEL); | |
630 | if (!new->se_slots[i]) | |
557ce264 | 631 | goto out_free; |
557ce264 | 632 | } |
5b6feee9 BF |
633 | return new; |
634 | out_free: | |
635 | while (i--) | |
636 | kfree(new->se_slots[i]); | |
637 | kfree(new); | |
638 | return NULL; | |
ec6b5d7b AA |
639 | } |
640 | ||
5b6feee9 | 641 | static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, struct nfsd4_channel_attrs *req, int numslots, int slotsize) |
ec6b5d7b | 642 | { |
5b6feee9 | 643 | u32 maxrpc = nfsd_serv->sv_max_mesg; |
ec6b5d7b | 644 | |
5b6feee9 | 645 | new->maxreqs = numslots; |
d2b21743 MJ |
646 | new->maxresp_cached = min_t(u32, req->maxresp_cached, |
647 | slotsize + NFSD_MIN_HDR_SEQ_SZ); | |
5b6feee9 BF |
648 | new->maxreq_sz = min_t(u32, req->maxreq_sz, maxrpc); |
649 | new->maxresp_sz = min_t(u32, req->maxresp_sz, maxrpc); | |
650 | new->maxops = min_t(u32, req->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
651 | } | |
ec6b5d7b | 652 | |
19cf5c02 BF |
653 | static void free_conn(struct nfsd4_conn *c) |
654 | { | |
655 | svc_xprt_put(c->cn_xprt); | |
656 | kfree(c); | |
657 | } | |
ec6b5d7b | 658 | |
19cf5c02 BF |
659 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
660 | { | |
661 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
662 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 663 | |
19cf5c02 BF |
664 | spin_lock(&clp->cl_lock); |
665 | if (!list_empty(&c->cn_persession)) { | |
666 | list_del(&c->cn_persession); | |
667 | free_conn(c); | |
668 | } | |
669 | spin_unlock(&clp->cl_lock); | |
eea49806 | 670 | nfsd4_probe_callback(clp); |
19cf5c02 | 671 | } |
ec6b5d7b | 672 | |
d29c374c | 673 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 674 | { |
c7662518 | 675 | struct nfsd4_conn *conn; |
ec6b5d7b | 676 | |
c7662518 BF |
677 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
678 | if (!conn) | |
db90681d | 679 | return NULL; |
c7662518 BF |
680 | svc_xprt_get(rqstp->rq_xprt); |
681 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 682 | conn->cn_flags = flags; |
db90681d BF |
683 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
684 | return conn; | |
685 | } | |
a649637c | 686 | |
328ead28 BF |
687 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
688 | { | |
689 | conn->cn_session = ses; | |
690 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
691 | } |
692 | ||
db90681d | 693 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 694 | { |
db90681d | 695 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 696 | |
c7662518 | 697 | spin_lock(&clp->cl_lock); |
328ead28 | 698 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 699 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
700 | } |
701 | ||
21b75b01 | 702 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 703 | { |
19cf5c02 | 704 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 705 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
706 | } |
707 | ||
1d1bc8f2 | 708 | static __be32 nfsd4_new_conn(struct svc_rqst *rqstp, struct nfsd4_session *ses, u32 dir) |
ec6b5d7b | 709 | { |
db90681d | 710 | struct nfsd4_conn *conn; |
21b75b01 | 711 | int ret; |
ec6b5d7b | 712 | |
1d1bc8f2 | 713 | conn = alloc_conn(rqstp, dir); |
db90681d BF |
714 | if (!conn) |
715 | return nfserr_jukebox; | |
716 | nfsd4_hash_conn(conn, ses); | |
21b75b01 BF |
717 | ret = nfsd4_register_conn(conn); |
718 | if (ret) | |
719 | /* oops; xprt is already down: */ | |
720 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
c7662518 BF |
721 | return nfs_ok; |
722 | } | |
ec6b5d7b | 723 | |
1d1bc8f2 BF |
724 | static __be32 nfsd4_new_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_session *ses) |
725 | { | |
726 | u32 dir = NFS4_CDFC4_FORE; | |
727 | ||
728 | if (ses->se_flags & SESSION4_BACK_CHAN) | |
729 | dir |= NFS4_CDFC4_BACK; | |
730 | ||
731 | return nfsd4_new_conn(rqstp, ses, dir); | |
732 | } | |
733 | ||
734 | /* must be called under client_lock */ | |
19cf5c02 | 735 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 736 | { |
19cf5c02 BF |
737 | struct nfs4_client *clp = s->se_client; |
738 | struct nfsd4_conn *c; | |
ec6b5d7b | 739 | |
19cf5c02 BF |
740 | spin_lock(&clp->cl_lock); |
741 | while (!list_empty(&s->se_conns)) { | |
742 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
743 | list_del_init(&c->cn_persession); | |
744 | spin_unlock(&clp->cl_lock); | |
557ce264 | 745 | |
19cf5c02 BF |
746 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
747 | free_conn(c); | |
ec6b5d7b | 748 | |
19cf5c02 BF |
749 | spin_lock(&clp->cl_lock); |
750 | } | |
751 | spin_unlock(&clp->cl_lock); | |
c7662518 | 752 | } |
ec6b5d7b | 753 | |
c7662518 BF |
754 | void free_session(struct kref *kref) |
755 | { | |
756 | struct nfsd4_session *ses; | |
757 | int mem; | |
758 | ||
759 | ses = container_of(kref, struct nfsd4_session, se_ref); | |
19cf5c02 | 760 | nfsd4_del_conns(ses); |
c7662518 BF |
761 | spin_lock(&nfsd_drc_lock); |
762 | mem = ses->se_fchannel.maxreqs * slot_bytes(&ses->se_fchannel); | |
763 | nfsd_drc_mem_used -= mem; | |
764 | spin_unlock(&nfsd_drc_lock); | |
765 | free_session_slots(ses); | |
766 | kfree(ses); | |
767 | } | |
768 | ||
ac7c46f2 | 769 | static struct nfsd4_session *alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
5b6feee9 BF |
770 | { |
771 | struct nfsd4_session *new; | |
772 | struct nfsd4_channel_attrs *fchan = &cses->fore_channel; | |
773 | int numslots, slotsize; | |
c7662518 | 774 | int status; |
5b6feee9 BF |
775 | int idx; |
776 | ||
777 | /* | |
778 | * Note decreasing slot size below client's request may | |
779 | * make it difficult for client to function correctly, whereas | |
780 | * decreasing the number of slots will (just?) affect | |
781 | * performance. When short on memory we therefore prefer to | |
782 | * decrease number of slots instead of their size. | |
783 | */ | |
784 | slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached); | |
785 | numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs); | |
ced6dfe9 MJ |
786 | if (numslots < 1) |
787 | return NULL; | |
5b6feee9 BF |
788 | |
789 | new = alloc_session(slotsize, numslots); | |
790 | if (!new) { | |
791 | nfsd4_put_drc_mem(slotsize, fchan->maxreqs); | |
ac7c46f2 | 792 | return NULL; |
557ce264 | 793 | } |
5b6feee9 | 794 | init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize); |
557ce264 | 795 | |
ec6b5d7b AA |
796 | new->se_client = clp; |
797 | gen_sessionid(new); | |
ec6b5d7b | 798 | |
c7662518 BF |
799 | INIT_LIST_HEAD(&new->se_conns); |
800 | ||
ac7c46f2 | 801 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 802 | new->se_flags = cses->flags; |
8b5ce5cd | 803 | new->se_cb_prog = cses->callback_prog; |
ec6b5d7b | 804 | kref_init(&new->se_ref); |
5b6feee9 | 805 | idx = hash_sessionid(&new->se_sessionid); |
9089f1b4 | 806 | spin_lock(&client_lock); |
ec6b5d7b | 807 | list_add(&new->se_hash, &sessionid_hashtbl[idx]); |
4c649378 | 808 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 809 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 810 | spin_unlock(&clp->cl_lock); |
9089f1b4 | 811 | spin_unlock(&client_lock); |
ec6b5d7b | 812 | |
1d1bc8f2 | 813 | status = nfsd4_new_conn_from_crses(rqstp, new); |
ac7c46f2 | 814 | /* whoops: benny points out, status is ignored! (err, or bogus) */ |
c7662518 BF |
815 | if (status) { |
816 | free_session(&new->se_ref); | |
ac7c46f2 | 817 | return NULL; |
c7662518 | 818 | } |
dcbeaa68 | 819 | if (cses->flags & SESSION4_BACK_CHAN) { |
edd76786 | 820 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
821 | /* |
822 | * This is a little silly; with sessions there's no real | |
823 | * use for the callback address. Use the peer address | |
824 | * as a reasonable default for now, but consider fixing | |
825 | * the rpc client not to require an address in the | |
826 | * future: | |
827 | */ | |
edd76786 BF |
828 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
829 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 830 | } |
dcbeaa68 | 831 | nfsd4_probe_callback(clp); |
ac7c46f2 | 832 | return new; |
ec6b5d7b AA |
833 | } |
834 | ||
9089f1b4 | 835 | /* caller must hold client_lock */ |
5282fd72 ME |
836 | static struct nfsd4_session * |
837 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) | |
838 | { | |
839 | struct nfsd4_session *elem; | |
840 | int idx; | |
841 | ||
842 | dump_sessionid(__func__, sessionid); | |
843 | idx = hash_sessionid(sessionid); | |
5282fd72 ME |
844 | /* Search in the appropriate list */ |
845 | list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { | |
5282fd72 ME |
846 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
847 | NFS4_MAX_SESSIONID_LEN)) { | |
848 | return elem; | |
849 | } | |
850 | } | |
851 | ||
852 | dprintk("%s: session not found\n", __func__); | |
853 | return NULL; | |
854 | } | |
855 | ||
9089f1b4 | 856 | /* caller must hold client_lock */ |
7116ed6b | 857 | static void |
5282fd72 | 858 | unhash_session(struct nfsd4_session *ses) |
7116ed6b AA |
859 | { |
860 | list_del(&ses->se_hash); | |
4c649378 | 861 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 862 | list_del(&ses->se_perclnt); |
4c649378 | 863 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
864 | } |
865 | ||
36acb66b | 866 | /* must be called under the client_lock */ |
1da177e4 | 867 | static inline void |
36acb66b | 868 | renew_client_locked(struct nfs4_client *clp) |
1da177e4 | 869 | { |
07cd4909 BH |
870 | if (is_client_expired(clp)) { |
871 | dprintk("%s: client (clientid %08x/%08x) already expired\n", | |
872 | __func__, | |
873 | clp->cl_clientid.cl_boot, | |
874 | clp->cl_clientid.cl_id); | |
875 | return; | |
876 | } | |
877 | ||
1da177e4 LT |
878 | /* |
879 | * Move client to the end to the LRU list. | |
880 | */ | |
881 | dprintk("renewing client (clientid %08x/%08x)\n", | |
882 | clp->cl_clientid.cl_boot, | |
883 | clp->cl_clientid.cl_id); | |
884 | list_move_tail(&clp->cl_lru, &client_lru); | |
885 | clp->cl_time = get_seconds(); | |
886 | } | |
887 | ||
36acb66b BH |
888 | static inline void |
889 | renew_client(struct nfs4_client *clp) | |
890 | { | |
891 | spin_lock(&client_lock); | |
892 | renew_client_locked(clp); | |
893 | spin_unlock(&client_lock); | |
894 | } | |
895 | ||
1da177e4 LT |
896 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
897 | static int | |
898 | STALE_CLIENTID(clientid_t *clid) | |
899 | { | |
900 | if (clid->cl_boot == boot_time) | |
901 | return 0; | |
60adfc50 AA |
902 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
903 | clid->cl_boot, clid->cl_id, boot_time); | |
1da177e4 LT |
904 | return 1; |
905 | } | |
906 | ||
907 | /* | |
908 | * XXX Should we use a slab cache ? | |
909 | * This type of memory management is somewhat inefficient, but we use it | |
910 | * anyway since SETCLIENTID is not a common operation. | |
911 | */ | |
35bba9a3 | 912 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
913 | { |
914 | struct nfs4_client *clp; | |
915 | ||
35bba9a3 BF |
916 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
917 | if (clp == NULL) | |
918 | return NULL; | |
919 | clp->cl_name.data = kmalloc(name.len, GFP_KERNEL); | |
920 | if (clp->cl_name.data == NULL) { | |
921 | kfree(clp); | |
922 | return NULL; | |
1da177e4 | 923 | } |
35bba9a3 BF |
924 | memcpy(clp->cl_name.data, name.data, name.len); |
925 | clp->cl_name.len = name.len; | |
1da177e4 LT |
926 | return clp; |
927 | } | |
928 | ||
929 | static inline void | |
930 | free_client(struct nfs4_client *clp) | |
931 | { | |
792c95dd BF |
932 | while (!list_empty(&clp->cl_sessions)) { |
933 | struct nfsd4_session *ses; | |
934 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
935 | se_perclnt); | |
936 | list_del(&ses->se_perclnt); | |
937 | nfsd4_put_session(ses); | |
938 | } | |
1da177e4 LT |
939 | if (clp->cl_cred.cr_group_info) |
940 | put_group_info(clp->cl_cred.cr_group_info); | |
68e76ad0 | 941 | kfree(clp->cl_principal); |
1da177e4 LT |
942 | kfree(clp->cl_name.data); |
943 | kfree(clp); | |
944 | } | |
945 | ||
d7682988 BH |
946 | void |
947 | release_session_client(struct nfsd4_session *session) | |
948 | { | |
949 | struct nfs4_client *clp = session->se_client; | |
950 | ||
951 | if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock)) | |
952 | return; | |
953 | if (is_client_expired(clp)) { | |
954 | free_client(clp); | |
955 | session->se_client = NULL; | |
956 | } else | |
957 | renew_client_locked(clp); | |
958 | spin_unlock(&client_lock); | |
d7682988 BH |
959 | } |
960 | ||
84d38ac9 BH |
961 | /* must be called under the client_lock */ |
962 | static inline void | |
963 | unhash_client_locked(struct nfs4_client *clp) | |
964 | { | |
792c95dd BF |
965 | struct nfsd4_session *ses; |
966 | ||
07cd4909 | 967 | mark_client_expired(clp); |
84d38ac9 | 968 | list_del(&clp->cl_lru); |
4c649378 | 969 | spin_lock(&clp->cl_lock); |
792c95dd BF |
970 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
971 | list_del_init(&ses->se_hash); | |
4c649378 | 972 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
973 | } |
974 | ||
1da177e4 LT |
975 | static void |
976 | expire_client(struct nfs4_client *clp) | |
977 | { | |
fe0750e5 | 978 | struct nfs4_openowner *oo; |
1da177e4 | 979 | struct nfs4_delegation *dp; |
1da177e4 LT |
980 | struct list_head reaplist; |
981 | ||
1da177e4 LT |
982 | INIT_LIST_HEAD(&reaplist); |
983 | spin_lock(&recall_lock); | |
ea1da636 N |
984 | while (!list_empty(&clp->cl_delegations)) { |
985 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
ea1da636 | 986 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
987 | list_move(&dp->dl_recall_lru, &reaplist); |
988 | } | |
989 | spin_unlock(&recall_lock); | |
990 | while (!list_empty(&reaplist)) { | |
991 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
992 | list_del_init(&dp->dl_recall_lru); | |
993 | unhash_delegation(dp); | |
994 | } | |
ea1da636 | 995 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 BF |
996 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
997 | release_openowner(oo); | |
1da177e4 | 998 | } |
6ff8da08 | 999 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
1000 | if (clp->cl_cb_conn.cb_xprt) |
1001 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
36acb66b BH |
1002 | list_del(&clp->cl_idhash); |
1003 | list_del(&clp->cl_strhash); | |
be1fdf6c | 1004 | spin_lock(&client_lock); |
84d38ac9 | 1005 | unhash_client_locked(clp); |
46583e25 BH |
1006 | if (atomic_read(&clp->cl_refcount) == 0) |
1007 | free_client(clp); | |
be1fdf6c | 1008 | spin_unlock(&client_lock); |
1da177e4 LT |
1009 | } |
1010 | ||
35bba9a3 BF |
1011 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
1012 | { | |
1013 | memcpy(target->cl_verifier.data, source->data, | |
1014 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
1015 | } |
1016 | ||
35bba9a3 BF |
1017 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
1018 | { | |
1da177e4 LT |
1019 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
1020 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
1021 | } | |
1022 | ||
35bba9a3 BF |
1023 | static void copy_cred(struct svc_cred *target, struct svc_cred *source) |
1024 | { | |
1da177e4 LT |
1025 | target->cr_uid = source->cr_uid; |
1026 | target->cr_gid = source->cr_gid; | |
1027 | target->cr_group_info = source->cr_group_info; | |
1028 | get_group_info(target->cr_group_info); | |
1029 | } | |
1030 | ||
35bba9a3 | 1031 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 1032 | { |
a55370a3 | 1033 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
1034 | } |
1035 | ||
1036 | static int | |
599e0a22 BF |
1037 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1038 | { | |
1039 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
1040 | } |
1041 | ||
1042 | static int | |
599e0a22 BF |
1043 | same_clid(clientid_t *cl1, clientid_t *cl2) |
1044 | { | |
1045 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1046 | } |
1047 | ||
1048 | /* XXX what about NGROUP */ | |
1049 | static int | |
599e0a22 BF |
1050 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
1051 | { | |
1052 | return cr1->cr_uid == cr2->cr_uid; | |
1da177e4 LT |
1053 | } |
1054 | ||
5ec7b46c BF |
1055 | static void gen_clid(struct nfs4_client *clp) |
1056 | { | |
1057 | static u32 current_clientid = 1; | |
1058 | ||
1da177e4 LT |
1059 | clp->cl_clientid.cl_boot = boot_time; |
1060 | clp->cl_clientid.cl_id = current_clientid++; | |
1061 | } | |
1062 | ||
deda2faa BF |
1063 | static void gen_confirm(struct nfs4_client *clp) |
1064 | { | |
1065 | static u32 i; | |
1066 | u32 *p; | |
1da177e4 | 1067 | |
1da177e4 | 1068 | p = (u32 *)clp->cl_confirm.data; |
deda2faa BF |
1069 | *p++ = get_seconds(); |
1070 | *p++ = i++; | |
1da177e4 LT |
1071 | } |
1072 | ||
4581d140 BF |
1073 | static int |
1074 | same_stateid(stateid_t *id_one, stateid_t *id_two) | |
1075 | { | |
1076 | if (id_one->si_stateownerid != id_two->si_stateownerid) | |
1077 | return 0; | |
1078 | return id_one->si_fileid == id_two->si_fileid; | |
1079 | } | |
1080 | ||
f459e453 | 1081 | static struct nfs4_stid *find_stateid(stateid_t *t) |
4581d140 | 1082 | { |
dcef0413 | 1083 | struct nfs4_stid *s; |
4581d140 BF |
1084 | unsigned int hashval; |
1085 | ||
ee626a77 | 1086 | hashval = stateid_hashval(t); |
dcef0413 BF |
1087 | list_for_each_entry(s, &stateid_hashtbl[hashval], sc_hash) |
1088 | if (same_stateid(&s->sc_stateid, t)) | |
f459e453 | 1089 | return s; |
4d71ab87 BF |
1090 | return NULL; |
1091 | } | |
1092 | ||
f459e453 | 1093 | static struct nfs4_ol_stateid *find_ol_stateid(stateid_t *t) |
4d71ab87 | 1094 | { |
f459e453 BF |
1095 | struct nfs4_stid *s; |
1096 | ||
1097 | s = find_stateid(t); | |
1098 | if (!s) | |
1099 | return NULL; | |
1100 | return openlockstateid(s); | |
1101 | } | |
1102 | ||
1103 | static struct nfs4_stid *find_stateid_by_type(stateid_t *t, char typemask) | |
1104 | { | |
1105 | struct nfs4_stid *s; | |
4d71ab87 BF |
1106 | |
1107 | s = find_stateid(t); | |
1108 | if (!s) | |
1109 | return NULL; | |
f459e453 | 1110 | if (typemask & s->sc_type) |
4581d140 | 1111 | return s; |
4581d140 BF |
1112 | return NULL; |
1113 | } | |
1114 | ||
f459e453 BF |
1115 | static struct nfs4_ol_stateid *find_ol_stateid_by_type(stateid_t *t, char typemask) |
1116 | { | |
1117 | struct nfs4_stid *s; | |
1118 | ||
1119 | s = find_stateid_by_type(t, typemask); | |
1120 | if (!s) | |
1121 | return NULL; | |
1122 | return openlockstateid(s); | |
1123 | } | |
1124 | ||
b09333c4 RL |
1125 | static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, |
1126 | struct svc_rqst *rqstp, nfs4_verifier *verf) | |
1127 | { | |
1128 | struct nfs4_client *clp; | |
1129 | struct sockaddr *sa = svc_addr(rqstp); | |
1130 | char *princ; | |
1131 | ||
1132 | clp = alloc_client(name); | |
1133 | if (clp == NULL) | |
1134 | return NULL; | |
1135 | ||
792c95dd BF |
1136 | INIT_LIST_HEAD(&clp->cl_sessions); |
1137 | ||
b09333c4 RL |
1138 | princ = svc_gss_principal(rqstp); |
1139 | if (princ) { | |
1140 | clp->cl_principal = kstrdup(princ, GFP_KERNEL); | |
1141 | if (clp->cl_principal == NULL) { | |
1142 | free_client(clp); | |
1143 | return NULL; | |
1144 | } | |
1145 | } | |
1146 | ||
1147 | memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); | |
46583e25 | 1148 | atomic_set(&clp->cl_refcount, 0); |
77a3569d | 1149 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; |
b09333c4 RL |
1150 | INIT_LIST_HEAD(&clp->cl_idhash); |
1151 | INIT_LIST_HEAD(&clp->cl_strhash); | |
1152 | INIT_LIST_HEAD(&clp->cl_openowners); | |
1153 | INIT_LIST_HEAD(&clp->cl_delegations); | |
b09333c4 | 1154 | INIT_LIST_HEAD(&clp->cl_lru); |
5ce8ba25 | 1155 | INIT_LIST_HEAD(&clp->cl_callbacks); |
6ff8da08 | 1156 | spin_lock_init(&clp->cl_lock); |
cee277d9 | 1157 | INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_do_callback_rpc); |
07cd4909 | 1158 | clp->cl_time = get_seconds(); |
b09333c4 RL |
1159 | clear_bit(0, &clp->cl_cb_slot_busy); |
1160 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1161 | copy_verf(clp, verf); | |
1162 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
1163 | clp->cl_flavor = rqstp->rq_flavor; | |
1164 | copy_cred(&clp->cl_cred, &rqstp->rq_cred); | |
1165 | gen_confirm(clp); | |
edd76786 | 1166 | clp->cl_cb_session = NULL; |
b09333c4 RL |
1167 | return clp; |
1168 | } | |
1169 | ||
35bba9a3 BF |
1170 | static int check_name(struct xdr_netobj name) |
1171 | { | |
1da177e4 LT |
1172 | if (name.len == 0) |
1173 | return 0; | |
1174 | if (name.len > NFS4_OPAQUE_LIMIT) { | |
2fdada03 | 1175 | dprintk("NFSD: check_name: name too long(%d)!\n", name.len); |
1da177e4 LT |
1176 | return 0; |
1177 | } | |
1178 | return 1; | |
1179 | } | |
1180 | ||
fd39ca9a | 1181 | static void |
1da177e4 LT |
1182 | add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) |
1183 | { | |
1184 | unsigned int idhashval; | |
1185 | ||
1186 | list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); | |
1187 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
1188 | list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); | |
36acb66b | 1189 | renew_client(clp); |
1da177e4 LT |
1190 | } |
1191 | ||
fd39ca9a | 1192 | static void |
1da177e4 LT |
1193 | move_to_confirmed(struct nfs4_client *clp) |
1194 | { | |
1195 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
1196 | unsigned int strhashval; | |
1197 | ||
1198 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
f116629d | 1199 | list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); |
a55370a3 | 1200 | strhashval = clientstr_hashval(clp->cl_recdir); |
328efbab | 1201 | list_move(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); |
1da177e4 LT |
1202 | renew_client(clp); |
1203 | } | |
1204 | ||
1205 | static struct nfs4_client * | |
1206 | find_confirmed_client(clientid_t *clid) | |
1207 | { | |
1208 | struct nfs4_client *clp; | |
1209 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1210 | ||
1211 | list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 1212 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
1213 | return clp; |
1214 | } | |
1215 | return NULL; | |
1216 | } | |
1217 | ||
1218 | static struct nfs4_client * | |
1219 | find_unconfirmed_client(clientid_t *clid) | |
1220 | { | |
1221 | struct nfs4_client *clp; | |
1222 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1223 | ||
1224 | list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 1225 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
1226 | return clp; |
1227 | } | |
1228 | return NULL; | |
1229 | } | |
1230 | ||
6e5f15c9 | 1231 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 1232 | { |
6e5f15c9 | 1233 | return clp->cl_exchange_flags != 0; |
e203d506 | 1234 | } |
a1bcecd2 | 1235 | |
28ce6054 | 1236 | static struct nfs4_client * |
e203d506 | 1237 | find_confirmed_client_by_str(const char *dname, unsigned int hashval) |
28ce6054 N |
1238 | { |
1239 | struct nfs4_client *clp; | |
1240 | ||
1241 | list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { | |
e203d506 | 1242 | if (same_name(clp->cl_recdir, dname)) |
28ce6054 N |
1243 | return clp; |
1244 | } | |
1245 | return NULL; | |
1246 | } | |
1247 | ||
1248 | static struct nfs4_client * | |
e203d506 | 1249 | find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) |
28ce6054 N |
1250 | { |
1251 | struct nfs4_client *clp; | |
1252 | ||
1253 | list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { | |
e203d506 | 1254 | if (same_name(clp->cl_recdir, dname)) |
28ce6054 N |
1255 | return clp; |
1256 | } | |
1257 | return NULL; | |
1258 | } | |
1259 | ||
fd39ca9a | 1260 | static void |
6f3d772f | 1261 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 1262 | { |
07263f1e | 1263 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
1264 | struct sockaddr *sa = svc_addr(rqstp); |
1265 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
1266 | unsigned short expected_family; |
1267 | ||
1268 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
1269 | if (se->se_callback_netid_len == 3 && | |
1270 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
1271 | expected_family = AF_INET; | |
1272 | else if (se->se_callback_netid_len == 4 && | |
1273 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
1274 | expected_family = AF_INET6; | |
1275 | else | |
1da177e4 LT |
1276 | goto out_err; |
1277 | ||
07263f1e | 1278 | conn->cb_addrlen = rpc_uaddr2sockaddr(se->se_callback_addr_val, |
aa9a4ec7 | 1279 | se->se_callback_addr_len, |
07263f1e BF |
1280 | (struct sockaddr *)&conn->cb_addr, |
1281 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 1282 | |
07263f1e | 1283 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 1284 | goto out_err; |
aa9a4ec7 | 1285 | |
07263f1e BF |
1286 | if (conn->cb_addr.ss_family == AF_INET6) |
1287 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 1288 | |
07263f1e BF |
1289 | conn->cb_prog = se->se_callback_prog; |
1290 | conn->cb_ident = se->se_callback_ident; | |
849a1cf1 | 1291 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
1da177e4 LT |
1292 | return; |
1293 | out_err: | |
07263f1e BF |
1294 | conn->cb_addr.ss_family = AF_UNSPEC; |
1295 | conn->cb_addrlen = 0; | |
849823c5 | 1296 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
1297 | "will not receive delegations\n", |
1298 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
1299 | ||
1da177e4 LT |
1300 | return; |
1301 | } | |
1302 | ||
074fe897 | 1303 | /* |
557ce264 | 1304 | * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. |
074fe897 | 1305 | */ |
074fe897 AA |
1306 | void |
1307 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) | |
074fe897 | 1308 | { |
557ce264 AA |
1309 | struct nfsd4_slot *slot = resp->cstate.slot; |
1310 | unsigned int base; | |
074fe897 | 1311 | |
557ce264 | 1312 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1313 | |
557ce264 AA |
1314 | slot->sl_opcnt = resp->opcnt; |
1315 | slot->sl_status = resp->cstate.status; | |
074fe897 | 1316 | |
bf864a31 | 1317 | if (nfsd4_not_cached(resp)) { |
557ce264 | 1318 | slot->sl_datalen = 0; |
bf864a31 | 1319 | return; |
074fe897 | 1320 | } |
557ce264 AA |
1321 | slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; |
1322 | base = (char *)resp->cstate.datap - | |
1323 | (char *)resp->xbuf->head[0].iov_base; | |
1324 | if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, | |
1325 | slot->sl_datalen)) | |
1326 | WARN("%s: sessions DRC could not cache compound\n", __func__); | |
1327 | return; | |
074fe897 AA |
1328 | } |
1329 | ||
1330 | /* | |
abfabf8c AA |
1331 | * Encode the replay sequence operation from the slot values. |
1332 | * If cachethis is FALSE encode the uncached rep error on the next | |
1333 | * operation which sets resp->p and increments resp->opcnt for | |
1334 | * nfs4svc_encode_compoundres. | |
074fe897 | 1335 | * |
074fe897 | 1336 | */ |
abfabf8c AA |
1337 | static __be32 |
1338 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
1339 | struct nfsd4_compoundres *resp) | |
074fe897 | 1340 | { |
abfabf8c AA |
1341 | struct nfsd4_op *op; |
1342 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 1343 | |
abfabf8c | 1344 | dprintk("--> %s resp->opcnt %d cachethis %u \n", __func__, |
557ce264 | 1345 | resp->opcnt, resp->cstate.slot->sl_cachethis); |
bf864a31 | 1346 | |
abfabf8c AA |
1347 | /* Encode the replayed sequence operation */ |
1348 | op = &args->ops[resp->opcnt - 1]; | |
1349 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 1350 | |
abfabf8c | 1351 | /* Return nfserr_retry_uncached_rep in next operation. */ |
557ce264 | 1352 | if (args->opcnt > 1 && slot->sl_cachethis == 0) { |
abfabf8c AA |
1353 | op = &args->ops[resp->opcnt++]; |
1354 | op->status = nfserr_retry_uncached_rep; | |
1355 | nfsd4_encode_operation(resp, op); | |
074fe897 | 1356 | } |
abfabf8c | 1357 | return op->status; |
074fe897 AA |
1358 | } |
1359 | ||
1360 | /* | |
557ce264 AA |
1361 | * The sequence operation is not cached because we can use the slot and |
1362 | * session values. | |
074fe897 AA |
1363 | */ |
1364 | __be32 | |
bf864a31 AA |
1365 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
1366 | struct nfsd4_sequence *seq) | |
074fe897 | 1367 | { |
557ce264 | 1368 | struct nfsd4_slot *slot = resp->cstate.slot; |
074fe897 AA |
1369 | __be32 status; |
1370 | ||
557ce264 | 1371 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1372 | |
abfabf8c AA |
1373 | /* Either returns 0 or nfserr_retry_uncached */ |
1374 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); | |
1375 | if (status == nfserr_retry_uncached_rep) | |
1376 | return status; | |
074fe897 | 1377 | |
557ce264 AA |
1378 | /* The sequence operation has been encoded, cstate->datap set. */ |
1379 | memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); | |
074fe897 | 1380 | |
557ce264 AA |
1381 | resp->opcnt = slot->sl_opcnt; |
1382 | resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); | |
1383 | status = slot->sl_status; | |
074fe897 AA |
1384 | |
1385 | return status; | |
1386 | } | |
1387 | ||
0733d213 AA |
1388 | /* |
1389 | * Set the exchange_id flags returned by the server. | |
1390 | */ | |
1391 | static void | |
1392 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
1393 | { | |
1394 | /* pNFS is not supported */ | |
1395 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
1396 | ||
1397 | /* Referrals are supported, Migration is not. */ | |
1398 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
1399 | ||
1400 | /* set the wire flags to return to client. */ | |
1401 | clid->flags = new->cl_exchange_flags; | |
1402 | } | |
1403 | ||
069b6ad4 AA |
1404 | __be32 |
1405 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
1406 | struct nfsd4_compound_state *cstate, | |
1407 | struct nfsd4_exchange_id *exid) | |
1408 | { | |
0733d213 AA |
1409 | struct nfs4_client *unconf, *conf, *new; |
1410 | int status; | |
1411 | unsigned int strhashval; | |
1412 | char dname[HEXDIR_LEN]; | |
363168b4 | 1413 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 1414 | nfs4_verifier verf = exid->verifier; |
363168b4 | 1415 | struct sockaddr *sa = svc_addr(rqstp); |
0733d213 | 1416 | |
363168b4 | 1417 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 1418 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 1419 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 1420 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 1421 | addr_str, exid->flags, exid->spa_how); |
0733d213 AA |
1422 | |
1423 | if (!check_name(exid->clname) || (exid->flags & ~EXCHGID4_FLAG_MASK_A)) | |
1424 | return nfserr_inval; | |
1425 | ||
1426 | /* Currently only support SP4_NONE */ | |
1427 | switch (exid->spa_how) { | |
1428 | case SP4_NONE: | |
1429 | break; | |
1430 | case SP4_SSV: | |
044bc1d4 | 1431 | return nfserr_serverfault; |
0733d213 AA |
1432 | default: |
1433 | BUG(); /* checked by xdr code */ | |
1434 | case SP4_MACH_CRED: | |
1435 | return nfserr_serverfault; /* no excuse :-/ */ | |
1436 | } | |
1437 | ||
1438 | status = nfs4_make_rec_clidname(dname, &exid->clname); | |
1439 | ||
1440 | if (status) | |
1441 | goto error; | |
1442 | ||
1443 | strhashval = clientstr_hashval(dname); | |
1444 | ||
1445 | nfs4_lock_state(); | |
1446 | status = nfs_ok; | |
1447 | ||
e203d506 | 1448 | conf = find_confirmed_client_by_str(dname, strhashval); |
0733d213 | 1449 | if (conf) { |
e203d506 BF |
1450 | if (!clp_used_exchangeid(conf)) { |
1451 | status = nfserr_clid_inuse; /* XXX: ? */ | |
1452 | goto out; | |
1453 | } | |
0733d213 AA |
1454 | if (!same_verf(&verf, &conf->cl_verifier)) { |
1455 | /* 18.35.4 case 8 */ | |
1456 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1457 | status = nfserr_not_same; | |
1458 | goto out; | |
1459 | } | |
1460 | /* Client reboot: destroy old state */ | |
1461 | expire_client(conf); | |
1462 | goto out_new; | |
1463 | } | |
1464 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { | |
1465 | /* 18.35.4 case 9 */ | |
1466 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1467 | status = nfserr_perm; | |
1468 | goto out; | |
1469 | } | |
1470 | expire_client(conf); | |
1471 | goto out_new; | |
1472 | } | |
0733d213 AA |
1473 | /* |
1474 | * Set bit when the owner id and verifier map to an already | |
1475 | * confirmed client id (18.35.3). | |
1476 | */ | |
1477 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
1478 | ||
1479 | /* | |
1480 | * Falling into 18.35.4 case 2, possible router replay. | |
1481 | * Leave confirmed record intact and return same result. | |
1482 | */ | |
1483 | copy_verf(conf, &verf); | |
1484 | new = conf; | |
1485 | goto out_copy; | |
6ddbbbfe MS |
1486 | } |
1487 | ||
1488 | /* 18.35.4 case 7 */ | |
1489 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1490 | status = nfserr_noent; | |
1491 | goto out; | |
0733d213 AA |
1492 | } |
1493 | ||
e203d506 | 1494 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
0733d213 AA |
1495 | if (unconf) { |
1496 | /* | |
1497 | * Possible retry or client restart. Per 18.35.4 case 4, | |
1498 | * a new unconfirmed record should be generated regardless | |
1499 | * of whether any properties have changed. | |
1500 | */ | |
1501 | expire_client(unconf); | |
1502 | } | |
1503 | ||
1504 | out_new: | |
1505 | /* Normal case */ | |
b09333c4 | 1506 | new = create_client(exid->clname, dname, rqstp, &verf); |
0733d213 | 1507 | if (new == NULL) { |
4731030d | 1508 | status = nfserr_jukebox; |
0733d213 AA |
1509 | goto out; |
1510 | } | |
1511 | ||
0733d213 | 1512 | gen_clid(new); |
0733d213 AA |
1513 | add_to_unconfirmed(new, strhashval); |
1514 | out_copy: | |
1515 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
1516 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
1517 | ||
38eb76a5 | 1518 | exid->seqid = 1; |
0733d213 AA |
1519 | nfsd4_set_ex_flags(new, exid); |
1520 | ||
1521 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
49557cc7 | 1522 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
1523 | status = nfs_ok; |
1524 | ||
1525 | out: | |
1526 | nfs4_unlock_state(); | |
1527 | error: | |
1528 | dprintk("nfsd4_exchange_id returns %d\n", ntohl(status)); | |
1529 | return status; | |
069b6ad4 AA |
1530 | } |
1531 | ||
b85d4c01 | 1532 | static int |
88e588d5 | 1533 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 1534 | { |
88e588d5 AA |
1535 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
1536 | slot_seqid); | |
b85d4c01 BH |
1537 | |
1538 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
1539 | if (slot_inuse) { |
1540 | if (seqid == slot_seqid) | |
b85d4c01 BH |
1541 | return nfserr_jukebox; |
1542 | else | |
1543 | return nfserr_seq_misordered; | |
1544 | } | |
1545 | /* Normal */ | |
88e588d5 | 1546 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 BH |
1547 | return nfs_ok; |
1548 | /* Replay */ | |
88e588d5 | 1549 | if (seqid == slot_seqid) |
b85d4c01 BH |
1550 | return nfserr_replay_cache; |
1551 | /* Wraparound */ | |
88e588d5 | 1552 | if (seqid == 1 && (slot_seqid + 1) == 0) |
b85d4c01 BH |
1553 | return nfs_ok; |
1554 | /* Misordered replay or misordered new request */ | |
1555 | return nfserr_seq_misordered; | |
1556 | } | |
1557 | ||
49557cc7 AA |
1558 | /* |
1559 | * Cache the create session result into the create session single DRC | |
1560 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
1561 | * Do this for solo or embedded create session operations. | |
1562 | */ | |
1563 | static void | |
1564 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
1565 | struct nfsd4_clid_slot *slot, int nfserr) | |
1566 | { | |
1567 | slot->sl_status = nfserr; | |
1568 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
1569 | } | |
1570 | ||
1571 | static __be32 | |
1572 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
1573 | struct nfsd4_clid_slot *slot) | |
1574 | { | |
1575 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
1576 | return slot->sl_status; | |
1577 | } | |
1578 | ||
1b74c25b MJ |
1579 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
1580 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
1581 | 1 + /* MIN tag is length with zero, only length */ \ | |
1582 | 3 + /* version, opcount, opcode */ \ | |
1583 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1584 | /* seqid, slotID, slotID, cache */ \ | |
1585 | 4 ) * sizeof(__be32)) | |
1586 | ||
1587 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
1588 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
1589 | 1 + /* status */ \ | |
1590 | 1 + /* MIN tag is length with zero, only length */ \ | |
1591 | 3 + /* opcount, opcode, opstatus*/ \ | |
1592 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1593 | /* seqid, slotID, slotID, slotID, status */ \ | |
1594 | 5 ) * sizeof(__be32)) | |
1595 | ||
1596 | static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs fchannel) | |
1597 | { | |
1598 | return fchannel.maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ | |
1599 | || fchannel.maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ; | |
1600 | } | |
1601 | ||
069b6ad4 AA |
1602 | __be32 |
1603 | nfsd4_create_session(struct svc_rqst *rqstp, | |
1604 | struct nfsd4_compound_state *cstate, | |
1605 | struct nfsd4_create_session *cr_ses) | |
1606 | { | |
363168b4 | 1607 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 1608 | struct nfs4_client *conf, *unconf; |
ac7c46f2 | 1609 | struct nfsd4_session *new; |
49557cc7 | 1610 | struct nfsd4_clid_slot *cs_slot = NULL; |
86c3e16c | 1611 | bool confirm_me = false; |
ec6b5d7b AA |
1612 | int status = 0; |
1613 | ||
a62573dc MJ |
1614 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
1615 | return nfserr_inval; | |
1616 | ||
ec6b5d7b AA |
1617 | nfs4_lock_state(); |
1618 | unconf = find_unconfirmed_client(&cr_ses->clientid); | |
1619 | conf = find_confirmed_client(&cr_ses->clientid); | |
1620 | ||
1621 | if (conf) { | |
49557cc7 AA |
1622 | cs_slot = &conf->cl_cs_slot; |
1623 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 1624 | if (status == nfserr_replay_cache) { |
ec6b5d7b | 1625 | dprintk("Got a create_session replay! seqid= %d\n", |
49557cc7 | 1626 | cs_slot->sl_seqid); |
38eb76a5 | 1627 | /* Return the cached reply status */ |
49557cc7 | 1628 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
38eb76a5 | 1629 | goto out; |
49557cc7 | 1630 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b AA |
1631 | status = nfserr_seq_misordered; |
1632 | dprintk("Sequence misordered!\n"); | |
1633 | dprintk("Expected seqid= %d but got seqid= %d\n", | |
49557cc7 | 1634 | cs_slot->sl_seqid, cr_ses->seqid); |
ec6b5d7b AA |
1635 | goto out; |
1636 | } | |
ec6b5d7b AA |
1637 | } else if (unconf) { |
1638 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || | |
363168b4 | 1639 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b AA |
1640 | status = nfserr_clid_inuse; |
1641 | goto out; | |
1642 | } | |
1643 | ||
49557cc7 AA |
1644 | cs_slot = &unconf->cl_cs_slot; |
1645 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
1646 | if (status) { |
1647 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 1648 | status = nfserr_seq_misordered; |
cd5b8144 | 1649 | goto out; |
ec6b5d7b AA |
1650 | } |
1651 | ||
86c3e16c | 1652 | confirm_me = true; |
ec6b5d7b AA |
1653 | conf = unconf; |
1654 | } else { | |
1655 | status = nfserr_stale_clientid; | |
1656 | goto out; | |
1657 | } | |
1658 | ||
8323c3b2 BF |
1659 | /* |
1660 | * XXX: we should probably set this at creation time, and check | |
1661 | * for consistent minorversion use throughout: | |
1662 | */ | |
1663 | conf->cl_minorversion = 1; | |
408b79bc BF |
1664 | /* |
1665 | * We do not support RDMA or persistent sessions | |
1666 | */ | |
1667 | cr_ses->flags &= ~SESSION4_PERSIST; | |
1668 | cr_ses->flags &= ~SESSION4_RDMA; | |
1669 | ||
1b74c25b MJ |
1670 | status = nfserr_toosmall; |
1671 | if (check_forechannel_attrs(cr_ses->fore_channel)) | |
1672 | goto out; | |
1673 | ||
ac7c46f2 BF |
1674 | status = nfserr_jukebox; |
1675 | new = alloc_init_session(rqstp, conf, cr_ses); | |
1676 | if (!new) | |
ec6b5d7b | 1677 | goto out; |
ac7c46f2 BF |
1678 | status = nfs_ok; |
1679 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, | |
ec6b5d7b | 1680 | NFS4_MAX_SESSIONID_LEN); |
12050657 MJ |
1681 | memcpy(&cr_ses->fore_channel, &new->se_fchannel, |
1682 | sizeof(struct nfsd4_channel_attrs)); | |
86c3e16c | 1683 | cs_slot->sl_seqid++; |
49557cc7 | 1684 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 1685 | |
49557cc7 AA |
1686 | /* cache solo and embedded create sessions under the state lock */ |
1687 | nfsd4_cache_create_session(cr_ses, cs_slot, status); | |
86c3e16c BF |
1688 | if (confirm_me) |
1689 | move_to_confirmed(conf); | |
ec6b5d7b AA |
1690 | out: |
1691 | nfs4_unlock_state(); | |
1692 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1693 | return status; | |
069b6ad4 AA |
1694 | } |
1695 | ||
57716355 BF |
1696 | static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) |
1697 | { | |
1698 | struct nfsd4_compoundres *resp = rqstp->rq_resp; | |
1699 | struct nfsd4_compoundargs *argp = rqstp->rq_argp; | |
1700 | ||
1701 | return argp->opcnt == resp->opcnt; | |
1702 | } | |
1703 | ||
1d1bc8f2 BF |
1704 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
1705 | { | |
1706 | switch (*dir) { | |
1707 | case NFS4_CDFC4_FORE: | |
1708 | case NFS4_CDFC4_BACK: | |
1709 | return nfs_ok; | |
1710 | case NFS4_CDFC4_FORE_OR_BOTH: | |
1711 | case NFS4_CDFC4_BACK_OR_BOTH: | |
1712 | *dir = NFS4_CDFC4_BOTH; | |
1713 | return nfs_ok; | |
1714 | }; | |
1715 | return nfserr_inval; | |
1716 | } | |
1717 | ||
1718 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, | |
1719 | struct nfsd4_compound_state *cstate, | |
1720 | struct nfsd4_bind_conn_to_session *bcts) | |
1721 | { | |
1722 | __be32 status; | |
1723 | ||
1724 | if (!nfsd4_last_compound_op(rqstp)) | |
1725 | return nfserr_not_only_op; | |
1726 | spin_lock(&client_lock); | |
1727 | cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid); | |
1728 | /* Sorta weird: we only need the refcnt'ing because new_conn acquires | |
1729 | * client_lock iself: */ | |
1730 | if (cstate->session) { | |
1731 | nfsd4_get_session(cstate->session); | |
1732 | atomic_inc(&cstate->session->se_client->cl_refcount); | |
1733 | } | |
1734 | spin_unlock(&client_lock); | |
1735 | if (!cstate->session) | |
1736 | return nfserr_badsession; | |
1737 | ||
1738 | status = nfsd4_map_bcts_dir(&bcts->dir); | |
1db2b9dd BS |
1739 | if (!status) |
1740 | nfsd4_new_conn(rqstp, cstate->session, bcts->dir); | |
1741 | return status; | |
1d1bc8f2 BF |
1742 | } |
1743 | ||
5d4cec2f BF |
1744 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
1745 | { | |
1746 | if (!session) | |
1747 | return 0; | |
1748 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
1749 | } | |
1750 | ||
069b6ad4 AA |
1751 | __be32 |
1752 | nfsd4_destroy_session(struct svc_rqst *r, | |
1753 | struct nfsd4_compound_state *cstate, | |
1754 | struct nfsd4_destroy_session *sessionid) | |
1755 | { | |
e10e0cfc BH |
1756 | struct nfsd4_session *ses; |
1757 | u32 status = nfserr_badsession; | |
1758 | ||
1759 | /* Notes: | |
1760 | * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid | |
1761 | * - Should we return nfserr_back_chan_busy if waiting for | |
1762 | * callbacks on to-be-destroyed session? | |
1763 | * - Do we need to clear any callback info from previous session? | |
1764 | */ | |
1765 | ||
5d4cec2f | 1766 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 BF |
1767 | if (!nfsd4_last_compound_op(r)) |
1768 | return nfserr_not_only_op; | |
1769 | } | |
e10e0cfc | 1770 | dump_sessionid(__func__, &sessionid->sessionid); |
9089f1b4 | 1771 | spin_lock(&client_lock); |
e10e0cfc BH |
1772 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid); |
1773 | if (!ses) { | |
9089f1b4 | 1774 | spin_unlock(&client_lock); |
e10e0cfc BH |
1775 | goto out; |
1776 | } | |
1777 | ||
1778 | unhash_session(ses); | |
9089f1b4 | 1779 | spin_unlock(&client_lock); |
e10e0cfc | 1780 | |
ab707e15 | 1781 | nfs4_lock_state(); |
84f5f7cc | 1782 | nfsd4_probe_callback_sync(ses->se_client); |
ab707e15 | 1783 | nfs4_unlock_state(); |
19cf5c02 BF |
1784 | |
1785 | nfsd4_del_conns(ses); | |
1786 | ||
e10e0cfc BH |
1787 | nfsd4_put_session(ses); |
1788 | status = nfs_ok; | |
1789 | out: | |
1790 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1791 | return status; | |
069b6ad4 AA |
1792 | } |
1793 | ||
a663bdd8 | 1794 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
1795 | { |
1796 | struct nfsd4_conn *c; | |
1797 | ||
1798 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 1799 | if (c->cn_xprt == xpt) { |
328ead28 BF |
1800 | return c; |
1801 | } | |
1802 | } | |
1803 | return NULL; | |
1804 | } | |
1805 | ||
a663bdd8 | 1806 | static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
1807 | { |
1808 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 1809 | struct nfsd4_conn *c; |
21b75b01 | 1810 | int ret; |
328ead28 BF |
1811 | |
1812 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 1813 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
328ead28 BF |
1814 | if (c) { |
1815 | spin_unlock(&clp->cl_lock); | |
1816 | free_conn(new); | |
1817 | return; | |
1818 | } | |
1819 | __nfsd4_hash_conn(new, ses); | |
1820 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
1821 | ret = nfsd4_register_conn(new); |
1822 | if (ret) | |
1823 | /* oops; xprt is already down: */ | |
1824 | nfsd4_conn_lost(&new->cn_xpt_user); | |
328ead28 BF |
1825 | return; |
1826 | } | |
1827 | ||
868b89c3 MJ |
1828 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
1829 | { | |
1830 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
1831 | ||
1832 | return args->opcnt > session->se_fchannel.maxops; | |
1833 | } | |
1834 | ||
ae82a8d0 MJ |
1835 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
1836 | struct nfsd4_session *session) | |
1837 | { | |
1838 | struct xdr_buf *xb = &rqstp->rq_arg; | |
1839 | ||
1840 | return xb->len > session->se_fchannel.maxreq_sz; | |
1841 | } | |
1842 | ||
069b6ad4 | 1843 | __be32 |
b85d4c01 | 1844 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
1845 | struct nfsd4_compound_state *cstate, |
1846 | struct nfsd4_sequence *seq) | |
1847 | { | |
f9bb94c4 | 1848 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
b85d4c01 BH |
1849 | struct nfsd4_session *session; |
1850 | struct nfsd4_slot *slot; | |
a663bdd8 | 1851 | struct nfsd4_conn *conn; |
b85d4c01 BH |
1852 | int status; |
1853 | ||
f9bb94c4 AA |
1854 | if (resp->opcnt != 1) |
1855 | return nfserr_sequence_pos; | |
1856 | ||
a663bdd8 BF |
1857 | /* |
1858 | * Will be either used or freed by nfsd4_sequence_check_conn | |
1859 | * below. | |
1860 | */ | |
1861 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
1862 | if (!conn) | |
1863 | return nfserr_jukebox; | |
1864 | ||
9089f1b4 | 1865 | spin_lock(&client_lock); |
b85d4c01 BH |
1866 | status = nfserr_badsession; |
1867 | session = find_in_sessionid_hashtbl(&seq->sessionid); | |
1868 | if (!session) | |
1869 | goto out; | |
1870 | ||
868b89c3 MJ |
1871 | status = nfserr_too_many_ops; |
1872 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
1873 | goto out; | |
1874 | ||
ae82a8d0 MJ |
1875 | status = nfserr_req_too_big; |
1876 | if (nfsd4_request_too_big(rqstp, session)) | |
1877 | goto out; | |
1878 | ||
b85d4c01 | 1879 | status = nfserr_badslot; |
6c18ba9f | 1880 | if (seq->slotid >= session->se_fchannel.maxreqs) |
b85d4c01 BH |
1881 | goto out; |
1882 | ||
557ce264 | 1883 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
1884 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
1885 | ||
a8dfdaeb AA |
1886 | /* We do not negotiate the number of slots yet, so set the |
1887 | * maxslots to the session maxreqs which is used to encode | |
1888 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
1889 | seq->maxslots = session->se_fchannel.maxreqs; | |
1890 | ||
88e588d5 | 1891 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, slot->sl_inuse); |
b85d4c01 BH |
1892 | if (status == nfserr_replay_cache) { |
1893 | cstate->slot = slot; | |
1894 | cstate->session = session; | |
da3846a2 | 1895 | /* Return the cached reply status and set cstate->status |
557ce264 | 1896 | * for nfsd4_proc_compound processing */ |
bf864a31 | 1897 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 1898 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 1899 | goto out; |
b85d4c01 BH |
1900 | } |
1901 | if (status) | |
1902 | goto out; | |
1903 | ||
a663bdd8 BF |
1904 | nfsd4_sequence_check_conn(conn, session); |
1905 | conn = NULL; | |
328ead28 | 1906 | |
b85d4c01 BH |
1907 | /* Success! bump slot seqid */ |
1908 | slot->sl_inuse = true; | |
1909 | slot->sl_seqid = seq->seqid; | |
557ce264 | 1910 | slot->sl_cachethis = seq->cachethis; |
b85d4c01 BH |
1911 | |
1912 | cstate->slot = slot; | |
1913 | cstate->session = session; | |
1914 | ||
b85d4c01 | 1915 | out: |
26c0c75e | 1916 | /* Hold a session reference until done processing the compound. */ |
aaf84eb9 | 1917 | if (cstate->session) { |
0d7bb719 BF |
1918 | struct nfs4_client *clp = session->se_client; |
1919 | ||
36acb66b | 1920 | nfsd4_get_session(cstate->session); |
0d7bb719 BF |
1921 | atomic_inc(&clp->cl_refcount); |
1922 | if (clp->cl_cb_state == NFSD4_CB_DOWN) | |
1923 | seq->status_flags |= SEQ4_STATUS_CB_PATH_DOWN; | |
aaf84eb9 | 1924 | } |
a663bdd8 | 1925 | kfree(conn); |
36acb66b | 1926 | spin_unlock(&client_lock); |
b85d4c01 BH |
1927 | dprintk("%s: return %d\n", __func__, ntohl(status)); |
1928 | return status; | |
069b6ad4 AA |
1929 | } |
1930 | ||
4dc6ec00 BF |
1931 | __be32 |
1932 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
1933 | { | |
bcecf1cc MJ |
1934 | int status = 0; |
1935 | ||
4dc6ec00 BF |
1936 | if (rc->rca_one_fs) { |
1937 | if (!cstate->current_fh.fh_dentry) | |
1938 | return nfserr_nofilehandle; | |
1939 | /* | |
1940 | * We don't take advantage of the rca_one_fs case. | |
1941 | * That's OK, it's optional, we can safely ignore it. | |
1942 | */ | |
1943 | return nfs_ok; | |
1944 | } | |
bcecf1cc | 1945 | |
4dc6ec00 | 1946 | nfs4_lock_state(); |
bcecf1cc MJ |
1947 | status = nfserr_complete_already; |
1948 | if (cstate->session->se_client->cl_firststate) | |
1949 | goto out; | |
1950 | ||
1951 | status = nfserr_stale_clientid; | |
1952 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
1953 | /* |
1954 | * The following error isn't really legal. | |
1955 | * But we only get here if the client just explicitly | |
1956 | * destroyed the client. Surely it no longer cares what | |
1957 | * error it gets back on an operation for the dead | |
1958 | * client. | |
1959 | */ | |
bcecf1cc MJ |
1960 | goto out; |
1961 | ||
1962 | status = nfs_ok; | |
4dc6ec00 | 1963 | nfsd4_create_clid_dir(cstate->session->se_client); |
bcecf1cc | 1964 | out: |
4dc6ec00 | 1965 | nfs4_unlock_state(); |
bcecf1cc | 1966 | return status; |
4dc6ec00 BF |
1967 | } |
1968 | ||
b37ad28b | 1969 | __be32 |
b591480b BF |
1970 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
1971 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 1972 | { |
1da177e4 LT |
1973 | struct xdr_netobj clname = { |
1974 | .len = setclid->se_namelen, | |
1975 | .data = setclid->se_name, | |
1976 | }; | |
1977 | nfs4_verifier clverifier = setclid->se_verf; | |
1978 | unsigned int strhashval; | |
28ce6054 | 1979 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 1980 | __be32 status; |
a55370a3 | 1981 | char dname[HEXDIR_LEN]; |
1da177e4 | 1982 | |
1da177e4 | 1983 | if (!check_name(clname)) |
73aea4ec | 1984 | return nfserr_inval; |
1da177e4 | 1985 | |
a55370a3 N |
1986 | status = nfs4_make_rec_clidname(dname, &clname); |
1987 | if (status) | |
73aea4ec | 1988 | return status; |
a55370a3 | 1989 | |
1da177e4 LT |
1990 | /* |
1991 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
1992 | * We get here on a DRC miss. | |
1993 | */ | |
1994 | ||
a55370a3 | 1995 | strhashval = clientstr_hashval(dname); |
1da177e4 | 1996 | |
1da177e4 | 1997 | nfs4_lock_state(); |
e203d506 | 1998 | conf = find_confirmed_client_by_str(dname, strhashval); |
28ce6054 | 1999 | if (conf) { |
a186e767 | 2000 | /* RFC 3530 14.2.33 CASE 0: */ |
1da177e4 | 2001 | status = nfserr_clid_inuse; |
e203d506 BF |
2002 | if (clp_used_exchangeid(conf)) |
2003 | goto out; | |
026722c2 | 2004 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
2005 | char addr_str[INET6_ADDRSTRLEN]; |
2006 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
2007 | sizeof(addr_str)); | |
2008 | dprintk("NFSD: setclientid: string in use by client " | |
2009 | "at %s\n", addr_str); | |
1da177e4 LT |
2010 | goto out; |
2011 | } | |
1da177e4 | 2012 | } |
a186e767 BF |
2013 | /* |
2014 | * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") | |
2015 | * has a description of SETCLIENTID request processing consisting | |
2016 | * of 5 bullet points, labeled as CASE0 - CASE4 below. | |
2017 | */ | |
e203d506 | 2018 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
3e772463 | 2019 | status = nfserr_jukebox; |
1da177e4 | 2020 | if (!conf) { |
a186e767 BF |
2021 | /* |
2022 | * RFC 3530 14.2.33 CASE 4: | |
2023 | * placed first, because it is the normal case | |
1da177e4 LT |
2024 | */ |
2025 | if (unconf) | |
2026 | expire_client(unconf); | |
b09333c4 | 2027 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 2028 | if (new == NULL) |
1da177e4 | 2029 | goto out; |
1da177e4 | 2030 | gen_clid(new); |
599e0a22 | 2031 | } else if (same_verf(&conf->cl_verifier, &clverifier)) { |
1da177e4 | 2032 | /* |
a186e767 BF |
2033 | * RFC 3530 14.2.33 CASE 1: |
2034 | * probable callback update | |
1da177e4 | 2035 | */ |
31f4a6c1 N |
2036 | if (unconf) { |
2037 | /* Note this is removing unconfirmed {*x***}, | |
2038 | * which is stronger than RFC recommended {vxc**}. | |
2039 | * This has the advantage that there is at most | |
2040 | * one {*x***} in either list at any time. | |
2041 | */ | |
2042 | expire_client(unconf); | |
1da177e4 | 2043 | } |
b09333c4 | 2044 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 2045 | if (new == NULL) |
1da177e4 | 2046 | goto out; |
1da177e4 | 2047 | copy_clid(new, conf); |
1da177e4 LT |
2048 | } else if (!unconf) { |
2049 | /* | |
a186e767 BF |
2050 | * RFC 3530 14.2.33 CASE 2: |
2051 | * probable client reboot; state will be removed if | |
2052 | * confirmed. | |
1da177e4 | 2053 | */ |
b09333c4 | 2054 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 2055 | if (new == NULL) |
1da177e4 | 2056 | goto out; |
1da177e4 | 2057 | gen_clid(new); |
49ba8781 | 2058 | } else { |
a186e767 BF |
2059 | /* |
2060 | * RFC 3530 14.2.33 CASE 3: | |
2061 | * probable client reboot; state will be removed if | |
2062 | * confirmed. | |
1da177e4 LT |
2063 | */ |
2064 | expire_client(unconf); | |
b09333c4 | 2065 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 2066 | if (new == NULL) |
1da177e4 | 2067 | goto out; |
1da177e4 | 2068 | gen_clid(new); |
1da177e4 | 2069 | } |
8323c3b2 BF |
2070 | /* |
2071 | * XXX: we should probably set this at creation time, and check | |
2072 | * for consistent minorversion use throughout: | |
2073 | */ | |
2074 | new->cl_minorversion = 0; | |
6f3d772f | 2075 | gen_callback(new, setclid, rqstp); |
c175b83c | 2076 | add_to_unconfirmed(new, strhashval); |
1da177e4 LT |
2077 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
2078 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
2079 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
2080 | status = nfs_ok; | |
2081 | out: | |
2082 | nfs4_unlock_state(); | |
2083 | return status; | |
2084 | } | |
2085 | ||
2086 | ||
2087 | /* | |
a186e767 BF |
2088 | * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has |
2089 | * a description of SETCLIENTID_CONFIRM request processing consisting of 4 | |
2090 | * bullets, labeled as CASE1 - CASE4 below. | |
1da177e4 | 2091 | */ |
b37ad28b | 2092 | __be32 |
b591480b BF |
2093 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
2094 | struct nfsd4_compound_state *cstate, | |
2095 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 2096 | { |
363168b4 | 2097 | struct sockaddr *sa = svc_addr(rqstp); |
21ab45a4 | 2098 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
2099 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
2100 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 2101 | __be32 status; |
1da177e4 LT |
2102 | |
2103 | if (STALE_CLIENTID(clid)) | |
2104 | return nfserr_stale_clientid; | |
2105 | /* | |
2106 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
2107 | * We get here on a DRC miss. | |
2108 | */ | |
2109 | ||
2110 | nfs4_lock_state(); | |
21ab45a4 N |
2111 | |
2112 | conf = find_confirmed_client(clid); | |
2113 | unconf = find_unconfirmed_client(clid); | |
2114 | ||
2115 | status = nfserr_clid_inuse; | |
363168b4 | 2116 | if (conf && !rpc_cmp_addr((struct sockaddr *) &conf->cl_addr, sa)) |
21ab45a4 | 2117 | goto out; |
363168b4 | 2118 | if (unconf && !rpc_cmp_addr((struct sockaddr *) &unconf->cl_addr, sa)) |
21ab45a4 N |
2119 | goto out; |
2120 | ||
a186e767 BF |
2121 | /* |
2122 | * section 14.2.34 of RFC 3530 has a description of | |
2123 | * SETCLIENTID_CONFIRM request processing consisting | |
2124 | * of 4 bullet points, labeled as CASE1 - CASE4 below. | |
2125 | */ | |
366e0c1d | 2126 | if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { |
a186e767 BF |
2127 | /* |
2128 | * RFC 3530 14.2.34 CASE 1: | |
2129 | * callback update | |
2130 | */ | |
599e0a22 | 2131 | if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) |
1da177e4 LT |
2132 | status = nfserr_clid_inuse; |
2133 | else { | |
5a3c9d71 BF |
2134 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
2135 | nfsd4_probe_callback(conf); | |
1a69c179 | 2136 | expire_client(unconf); |
1da177e4 | 2137 | status = nfs_ok; |
1a69c179 | 2138 | |
1da177e4 | 2139 | } |
f3aba4e5 | 2140 | } else if (conf && !unconf) { |
a186e767 BF |
2141 | /* |
2142 | * RFC 3530 14.2.34 CASE 2: | |
2143 | * probable retransmitted request; play it safe and | |
2144 | * do nothing. | |
7c79f737 | 2145 | */ |
599e0a22 | 2146 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) |
1da177e4 | 2147 | status = nfserr_clid_inuse; |
21ab45a4 | 2148 | else |
1da177e4 | 2149 | status = nfs_ok; |
7c79f737 | 2150 | } else if (!conf && unconf |
599e0a22 | 2151 | && same_verf(&unconf->cl_confirm, &confirm)) { |
a186e767 BF |
2152 | /* |
2153 | * RFC 3530 14.2.34 CASE 3: | |
2154 | * Normal case; new or rebooted client: | |
7c79f737 | 2155 | */ |
599e0a22 | 2156 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { |
1da177e4 LT |
2157 | status = nfserr_clid_inuse; |
2158 | } else { | |
1a69c179 N |
2159 | unsigned int hash = |
2160 | clientstr_hashval(unconf->cl_recdir); | |
2161 | conf = find_confirmed_client_by_str(unconf->cl_recdir, | |
e203d506 | 2162 | hash); |
1a69c179 | 2163 | if (conf) { |
c7b9a459 | 2164 | nfsd4_remove_clid_dir(conf); |
1a69c179 N |
2165 | expire_client(conf); |
2166 | } | |
1da177e4 | 2167 | move_to_confirmed(unconf); |
21ab45a4 | 2168 | conf = unconf; |
5a3c9d71 | 2169 | nfsd4_probe_callback(conf); |
1a69c179 | 2170 | status = nfs_ok; |
1da177e4 | 2171 | } |
599e0a22 BF |
2172 | } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) |
2173 | && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, | |
7c79f737 | 2174 | &confirm)))) { |
a186e767 BF |
2175 | /* |
2176 | * RFC 3530 14.2.34 CASE 4: | |
2177 | * Client probably hasn't noticed that we rebooted yet. | |
7c79f737 | 2178 | */ |
1da177e4 | 2179 | status = nfserr_stale_clientid; |
7c79f737 | 2180 | } else { |
08e8987c N |
2181 | /* check that we have hit one of the cases...*/ |
2182 | status = nfserr_clid_inuse; | |
2183 | } | |
1da177e4 | 2184 | out: |
1da177e4 LT |
2185 | nfs4_unlock_state(); |
2186 | return status; | |
2187 | } | |
2188 | ||
1da177e4 LT |
2189 | /* OPEN Share state helper functions */ |
2190 | static inline struct nfs4_file * | |
2191 | alloc_init_file(struct inode *ino) | |
2192 | { | |
2193 | struct nfs4_file *fp; | |
2194 | unsigned int hashval = file_hashval(ino); | |
2195 | ||
e60d4398 N |
2196 | fp = kmem_cache_alloc(file_slab, GFP_KERNEL); |
2197 | if (fp) { | |
8b671b80 | 2198 | atomic_set(&fp->fi_ref, 1); |
1da177e4 | 2199 | INIT_LIST_HEAD(&fp->fi_hash); |
8beefa24 N |
2200 | INIT_LIST_HEAD(&fp->fi_stateids); |
2201 | INIT_LIST_HEAD(&fp->fi_delegations); | |
1da177e4 LT |
2202 | fp->fi_inode = igrab(ino); |
2203 | fp->fi_id = current_fileid++; | |
47f9940c | 2204 | fp->fi_had_conflict = false; |
acfdf5c3 | 2205 | fp->fi_lease = NULL; |
f9d7562f BF |
2206 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); |
2207 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
47cee541 PE |
2208 | spin_lock(&recall_lock); |
2209 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); | |
2210 | spin_unlock(&recall_lock); | |
1da177e4 LT |
2211 | return fp; |
2212 | } | |
2213 | return NULL; | |
2214 | } | |
2215 | ||
e60d4398 | 2216 | static void |
e18b890b | 2217 | nfsd4_free_slab(struct kmem_cache **slab) |
1da177e4 | 2218 | { |
e60d4398 N |
2219 | if (*slab == NULL) |
2220 | return; | |
1a1d92c1 | 2221 | kmem_cache_destroy(*slab); |
e60d4398 | 2222 | *slab = NULL; |
1da177e4 LT |
2223 | } |
2224 | ||
e8ff2a84 | 2225 | void |
1da177e4 LT |
2226 | nfsd4_free_slabs(void) |
2227 | { | |
fe0750e5 BF |
2228 | nfsd4_free_slab(&openowner_slab); |
2229 | nfsd4_free_slab(&lockowner_slab); | |
e60d4398 | 2230 | nfsd4_free_slab(&file_slab); |
5ac049ac | 2231 | nfsd4_free_slab(&stateid_slab); |
5b2d21c1 | 2232 | nfsd4_free_slab(&deleg_slab); |
e60d4398 | 2233 | } |
1da177e4 | 2234 | |
e60d4398 N |
2235 | static int |
2236 | nfsd4_init_slabs(void) | |
2237 | { | |
fe0750e5 BF |
2238 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
2239 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2240 | if (openowner_slab == NULL) | |
2241 | goto out_nomem; | |
2242 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", | |
2243 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2244 | if (lockowner_slab == NULL) | |
e60d4398 N |
2245 | goto out_nomem; |
2246 | file_slab = kmem_cache_create("nfsd4_files", | |
20c2df83 | 2247 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 N |
2248 | if (file_slab == NULL) |
2249 | goto out_nomem; | |
5ac049ac | 2250 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
dcef0413 | 2251 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
5ac049ac N |
2252 | if (stateid_slab == NULL) |
2253 | goto out_nomem; | |
5b2d21c1 | 2254 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 2255 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 N |
2256 | if (deleg_slab == NULL) |
2257 | goto out_nomem; | |
e60d4398 N |
2258 | return 0; |
2259 | out_nomem: | |
2260 | nfsd4_free_slabs(); | |
2261 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | |
2262 | return -ENOMEM; | |
1da177e4 LT |
2263 | } |
2264 | ||
fe0750e5 BF |
2265 | void nfs4_free_openowner(struct nfs4_openowner *oo) |
2266 | { | |
2267 | kfree(oo->oo_owner.so_owner.data); | |
2268 | kmem_cache_free(openowner_slab, oo); | |
2269 | } | |
2270 | ||
2271 | void nfs4_free_lockowner(struct nfs4_lockowner *lo) | |
1da177e4 | 2272 | { |
fe0750e5 BF |
2273 | kfree(lo->lo_owner.so_owner.data); |
2274 | kmem_cache_free(lockowner_slab, lo); | |
1da177e4 LT |
2275 | } |
2276 | ||
ff194bd9 | 2277 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 2278 | { |
ff194bd9 BF |
2279 | rp->rp_status = nfserr_serverfault; |
2280 | rp->rp_buflen = 0; | |
2281 | rp->rp_buf = rp->rp_ibuf; | |
1da177e4 LT |
2282 | } |
2283 | ||
fe0750e5 | 2284 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 2285 | { |
1da177e4 | 2286 | struct nfs4_stateowner *sop; |
1da177e4 | 2287 | |
fe0750e5 | 2288 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
2289 | if (!sop) |
2290 | return NULL; | |
2291 | ||
2292 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); | |
2293 | if (!sop->so_owner.data) { | |
fe0750e5 | 2294 | kmem_cache_free(slab, sop); |
1da177e4 | 2295 | return NULL; |
ff194bd9 BF |
2296 | } |
2297 | sop->so_owner.len = owner->len; | |
2298 | ||
ea1da636 | 2299 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 | 2300 | sop->so_id = current_ownerid++; |
ff194bd9 BF |
2301 | sop->so_client = clp; |
2302 | init_nfs4_replay(&sop->so_replay); | |
2303 | return sop; | |
2304 | } | |
2305 | ||
fe0750e5 | 2306 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 BF |
2307 | { |
2308 | unsigned int idhashval; | |
2309 | ||
fe0750e5 BF |
2310 | idhashval = open_ownerid_hashval(oo->oo_owner.so_id); |
2311 | list_add(&oo->oo_owner.so_idhash, &open_ownerid_hashtbl[idhashval]); | |
2312 | list_add(&oo->oo_owner.so_strhash, &open_ownerstr_hashtbl[strhashval]); | |
2313 | list_add(&oo->oo_perclient, &clp->cl_openowners); | |
ff194bd9 BF |
2314 | } |
2315 | ||
fe0750e5 | 2316 | static struct nfs4_openowner * |
ff194bd9 | 2317 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { |
fe0750e5 | 2318 | struct nfs4_openowner *oo; |
ff194bd9 | 2319 | |
fe0750e5 BF |
2320 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
2321 | if (!oo) | |
ff194bd9 | 2322 | return NULL; |
fe0750e5 BF |
2323 | oo->oo_owner.so_is_open_owner = 1; |
2324 | oo->oo_owner.so_seqid = open->op_seqid; | |
dad1c067 | 2325 | oo->oo_flags = 0; |
fe0750e5 BF |
2326 | oo->oo_time = 0; |
2327 | INIT_LIST_HEAD(&oo->oo_close_lru); | |
2328 | hash_openowner(oo, clp, strhashval); | |
2329 | return oo; | |
1da177e4 LT |
2330 | } |
2331 | ||
1da177e4 | 2332 | static inline void |
dcef0413 | 2333 | init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { |
fe0750e5 | 2334 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 2335 | |
ea1da636 | 2336 | INIT_LIST_HEAD(&stp->st_lockowners); |
fe0750e5 | 2337 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); |
8beefa24 | 2338 | list_add(&stp->st_perfile, &fp->fi_stateids); |
dcef0413 | 2339 | stp->st_stid.sc_type = NFS4_OPEN_STID; |
fe0750e5 | 2340 | stp->st_stateowner = &oo->oo_owner; |
13cd2184 | 2341 | get_nfs4_file(fp); |
1da177e4 | 2342 | stp->st_file = fp; |
dcef0413 BF |
2343 | stp->st_stid.sc_stateid.si_boot = boot_time; |
2344 | stp->st_stid.sc_stateid.si_stateownerid = oo->oo_owner.so_id; | |
2345 | stp->st_stid.sc_stateid.si_fileid = fp->fi_id; | |
73997dc4 | 2346 | /* note will be incremented before first return to client: */ |
dcef0413 | 2347 | stp->st_stid.sc_stateid.si_generation = 0; |
36d44c60 | 2348 | hash_stid(&stp->st_stid); |
1da177e4 LT |
2349 | stp->st_access_bmap = 0; |
2350 | stp->st_deny_bmap = 0; | |
84459a11 AA |
2351 | __set_bit(open->op_share_access & ~NFS4_SHARE_WANT_MASK, |
2352 | &stp->st_access_bmap); | |
1da177e4 | 2353 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
4c4cd222 | 2354 | stp->st_openstp = NULL; |
1da177e4 LT |
2355 | } |
2356 | ||
fd39ca9a | 2357 | static void |
fe0750e5 | 2358 | move_to_close_lru(struct nfs4_openowner *oo) |
1da177e4 | 2359 | { |
fe0750e5 | 2360 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 2361 | |
fe0750e5 BF |
2362 | list_move_tail(&oo->oo_close_lru, &close_lru); |
2363 | oo->oo_time = get_seconds(); | |
1da177e4 LT |
2364 | } |
2365 | ||
1da177e4 | 2366 | static int |
599e0a22 BF |
2367 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
2368 | clientid_t *clid) | |
2369 | { | |
2370 | return (sop->so_owner.len == owner->len) && | |
2371 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
2372 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
2373 | } |
2374 | ||
fe0750e5 | 2375 | static struct nfs4_openowner * |
1da177e4 LT |
2376 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) |
2377 | { | |
2378 | struct nfs4_stateowner *so = NULL; | |
2379 | ||
506f275f | 2380 | list_for_each_entry(so, &open_ownerstr_hashtbl[hashval], so_strhash) { |
599e0a22 | 2381 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) |
fe0750e5 | 2382 | return container_of(so, struct nfs4_openowner, oo_owner); |
1da177e4 LT |
2383 | } |
2384 | return NULL; | |
2385 | } | |
2386 | ||
2387 | /* search file_hashtbl[] for file */ | |
2388 | static struct nfs4_file * | |
2389 | find_file(struct inode *ino) | |
2390 | { | |
2391 | unsigned int hashval = file_hashval(ino); | |
2392 | struct nfs4_file *fp; | |
2393 | ||
8b671b80 | 2394 | spin_lock(&recall_lock); |
1da177e4 | 2395 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
13cd2184 N |
2396 | if (fp->fi_inode == ino) { |
2397 | get_nfs4_file(fp); | |
8b671b80 | 2398 | spin_unlock(&recall_lock); |
1da177e4 | 2399 | return fp; |
13cd2184 | 2400 | } |
1da177e4 | 2401 | } |
8b671b80 | 2402 | spin_unlock(&recall_lock); |
1da177e4 LT |
2403 | return NULL; |
2404 | } | |
2405 | ||
d87a8ade | 2406 | static inline int access_valid(u32 x, u32 minorversion) |
ba5a6a19 | 2407 | { |
d87a8ade | 2408 | if ((x & NFS4_SHARE_ACCESS_MASK) < NFS4_SHARE_ACCESS_READ) |
8838dc43 | 2409 | return 0; |
d87a8ade AA |
2410 | if ((x & NFS4_SHARE_ACCESS_MASK) > NFS4_SHARE_ACCESS_BOTH) |
2411 | return 0; | |
2412 | x &= ~NFS4_SHARE_ACCESS_MASK; | |
2413 | if (minorversion && x) { | |
2414 | if ((x & NFS4_SHARE_WANT_MASK) > NFS4_SHARE_WANT_CANCEL) | |
2415 | return 0; | |
2416 | if ((x & NFS4_SHARE_WHEN_MASK) > NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED) | |
2417 | return 0; | |
2418 | x &= ~(NFS4_SHARE_WANT_MASK | NFS4_SHARE_WHEN_MASK); | |
2419 | } | |
2420 | if (x) | |
8838dc43 BF |
2421 | return 0; |
2422 | return 1; | |
ba5a6a19 BF |
2423 | } |
2424 | ||
8838dc43 | 2425 | static inline int deny_valid(u32 x) |
ba5a6a19 | 2426 | { |
8838dc43 BF |
2427 | /* Note: unlike access bits, deny bits may be zero. */ |
2428 | return x <= NFS4_SHARE_DENY_BOTH; | |
ba5a6a19 | 2429 | } |
1da177e4 | 2430 | |
1da177e4 LT |
2431 | /* |
2432 | * Called to check deny when READ with all zero stateid or | |
2433 | * WRITE with all zero or all one stateid | |
2434 | */ | |
b37ad28b | 2435 | static __be32 |
1da177e4 LT |
2436 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
2437 | { | |
2438 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2439 | struct nfs4_file *fp; | |
dcef0413 | 2440 | struct nfs4_ol_stateid *stp; |
b37ad28b | 2441 | __be32 ret; |
1da177e4 LT |
2442 | |
2443 | dprintk("NFSD: nfs4_share_conflict\n"); | |
2444 | ||
2445 | fp = find_file(ino); | |
13cd2184 N |
2446 | if (!fp) |
2447 | return nfs_ok; | |
b700949b | 2448 | ret = nfserr_locked; |
1da177e4 | 2449 | /* Search for conflicting share reservations */ |
13cd2184 N |
2450 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
2451 | if (test_bit(deny_type, &stp->st_deny_bmap) || | |
2452 | test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) | |
2453 | goto out; | |
1da177e4 | 2454 | } |
13cd2184 N |
2455 | ret = nfs_ok; |
2456 | out: | |
2457 | put_nfs4_file(fp); | |
2458 | return ret; | |
1da177e4 LT |
2459 | } |
2460 | ||
6b57d9c8 | 2461 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
1da177e4 | 2462 | { |
1da177e4 LT |
2463 | /* We're assuming the state code never drops its reference |
2464 | * without first removing the lease. Since we're in this lease | |
2465 | * callback (and since the lease code is serialized by the kernel | |
2466 | * lock) we know the server hasn't removed the lease yet, we know | |
2467 | * it's safe to take a reference: */ | |
2468 | atomic_inc(&dp->dl_count); | |
2469 | ||
1da177e4 | 2470 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); |
1da177e4 | 2471 | |
460781b5 | 2472 | /* only place dl_time is set. protected by lock_flocks*/ |
1da177e4 LT |
2473 | dp->dl_time = get_seconds(); |
2474 | ||
6b57d9c8 BF |
2475 | nfsd4_cb_recall(dp); |
2476 | } | |
2477 | ||
acfdf5c3 | 2478 | /* Called from break_lease() with lock_flocks() held. */ |
6b57d9c8 BF |
2479 | static void nfsd_break_deleg_cb(struct file_lock *fl) |
2480 | { | |
acfdf5c3 BF |
2481 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
2482 | struct nfs4_delegation *dp; | |
6b57d9c8 | 2483 | |
acfdf5c3 BF |
2484 | BUG_ON(!fp); |
2485 | /* We assume break_lease is only called once per lease: */ | |
2486 | BUG_ON(fp->fi_had_conflict); | |
0272e1fd BF |
2487 | /* |
2488 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 2489 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 2490 | * in time: |
0272e1fd BF |
2491 | */ |
2492 | fl->fl_break_time = 0; | |
1da177e4 | 2493 | |
5d926e8c | 2494 | spin_lock(&recall_lock); |
acfdf5c3 BF |
2495 | fp->fi_had_conflict = true; |
2496 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
2497 | nfsd_break_one_deleg(dp); | |
5d926e8c | 2498 | spin_unlock(&recall_lock); |
1da177e4 LT |
2499 | } |
2500 | ||
1da177e4 LT |
2501 | static |
2502 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
2503 | { | |
2504 | if (arg & F_UNLCK) | |
2505 | return lease_modify(onlist, arg); | |
2506 | else | |
2507 | return -EAGAIN; | |
2508 | } | |
2509 | ||
7b021967 | 2510 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
2511 | .lm_break = nfsd_break_deleg_cb, |
2512 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
2513 | }; |
2514 | ||
7a8711c9 BF |
2515 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
2516 | { | |
2517 | if (nfsd4_has_session(cstate)) | |
2518 | return nfs_ok; | |
2519 | if (seqid == so->so_seqid - 1) | |
2520 | return nfserr_replay_me; | |
2521 | if (seqid == so->so_seqid) | |
2522 | return nfs_ok; | |
2523 | return nfserr_bad_seqid; | |
2524 | } | |
1da177e4 | 2525 | |
b37ad28b | 2526 | __be32 |
6668958f AA |
2527 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
2528 | struct nfsd4_open *open) | |
1da177e4 | 2529 | { |
1da177e4 LT |
2530 | clientid_t *clientid = &open->op_clientid; |
2531 | struct nfs4_client *clp = NULL; | |
2532 | unsigned int strhashval; | |
fe0750e5 | 2533 | struct nfs4_openowner *oo = NULL; |
7a8711c9 | 2534 | __be32 status; |
1da177e4 | 2535 | |
1da177e4 | 2536 | if (!check_name(open->op_owner)) |
0f442aa2 | 2537 | return nfserr_inval; |
1da177e4 LT |
2538 | |
2539 | if (STALE_CLIENTID(&open->op_clientid)) | |
2540 | return nfserr_stale_clientid; | |
2541 | ||
506f275f | 2542 | strhashval = open_ownerstr_hashval(clientid->cl_id, &open->op_owner); |
fe0750e5 BF |
2543 | oo = find_openstateowner_str(strhashval, open); |
2544 | open->op_openowner = oo; | |
2545 | if (!oo) { | |
0f442aa2 | 2546 | /* Make sure the client's lease hasn't expired. */ |
1da177e4 LT |
2547 | clp = find_confirmed_client(clientid); |
2548 | if (clp == NULL) | |
0f442aa2 BF |
2549 | return nfserr_expired; |
2550 | goto renew; | |
1da177e4 | 2551 | } |
dad1c067 | 2552 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
0f442aa2 | 2553 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
2554 | clp = oo->oo_owner.so_client; |
2555 | release_openowner(oo); | |
2556 | open->op_openowner = NULL; | |
0f442aa2 BF |
2557 | goto renew; |
2558 | } | |
fe0750e5 | 2559 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
7a8711c9 BF |
2560 | if (status) |
2561 | return status; | |
1da177e4 | 2562 | renew: |
fe0750e5 BF |
2563 | if (open->op_openowner == NULL) { |
2564 | oo = alloc_init_open_stateowner(strhashval, clp, open); | |
2565 | if (oo == NULL) | |
3e772463 | 2566 | return nfserr_jukebox; |
fe0750e5 | 2567 | open->op_openowner = oo; |
0f442aa2 | 2568 | } |
fe0750e5 BF |
2569 | list_del_init(&oo->oo_close_lru); |
2570 | renew_client(oo->oo_owner.so_client); | |
0f442aa2 | 2571 | return nfs_ok; |
1da177e4 LT |
2572 | } |
2573 | ||
b37ad28b | 2574 | static inline __be32 |
4a6e43e6 N |
2575 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
2576 | { | |
2577 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
2578 | return nfserr_openmode; | |
2579 | else | |
2580 | return nfs_ok; | |
2581 | } | |
2582 | ||
f459e453 | 2583 | static int share_access_to_flags(u32 share_access) |
52f4fb43 | 2584 | { |
f459e453 | 2585 | share_access &= ~NFS4_SHARE_WANT_MASK; |
52f4fb43 | 2586 | |
f459e453 | 2587 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
52f4fb43 N |
2588 | } |
2589 | ||
f459e453 | 2590 | static struct nfs4_delegation *find_deleg_stateid(stateid_t *s) |
24a0111e | 2591 | { |
f459e453 | 2592 | struct nfs4_stid *ret; |
24a0111e | 2593 | |
f459e453 BF |
2594 | ret = find_stateid_by_type(s, NFS4_DELEG_STID); |
2595 | if (!ret) | |
2596 | return NULL; | |
2597 | return delegstateid(ret); | |
24a0111e BF |
2598 | } |
2599 | ||
b37ad28b | 2600 | static __be32 |
567d9829 N |
2601 | nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, |
2602 | struct nfs4_delegation **dp) | |
2603 | { | |
2604 | int flags; | |
b37ad28b | 2605 | __be32 status = nfserr_bad_stateid; |
567d9829 | 2606 | |
f459e453 | 2607 | *dp = find_deleg_stateid(&open->op_delegate_stateid); |
567d9829 | 2608 | if (*dp == NULL) |
c44c5eeb | 2609 | goto out; |
24a0111e | 2610 | flags = share_access_to_flags(open->op_share_access); |
567d9829 N |
2611 | status = nfs4_check_delegmode(*dp, flags); |
2612 | if (status) | |
2613 | *dp = NULL; | |
c44c5eeb N |
2614 | out: |
2615 | if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2616 | return nfs_ok; | |
2617 | if (status) | |
2618 | return status; | |
dad1c067 | 2619 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
c44c5eeb | 2620 | return nfs_ok; |
567d9829 N |
2621 | } |
2622 | ||
b37ad28b | 2623 | static __be32 |
dcef0413 | 2624 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp) |
1da177e4 | 2625 | { |
dcef0413 | 2626 | struct nfs4_ol_stateid *local; |
fe0750e5 | 2627 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 2628 | |
8beefa24 | 2629 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
2630 | /* ignore lock owners */ |
2631 | if (local->st_stateowner->so_is_open_owner == 0) | |
2632 | continue; | |
2633 | /* remember if we have seen this open owner */ | |
fe0750e5 | 2634 | if (local->st_stateowner == &oo->oo_owner) |
1da177e4 LT |
2635 | *stpp = local; |
2636 | /* check for conflicting share reservations */ | |
2637 | if (!test_share(local, open)) | |
77eaae8d | 2638 | return nfserr_share_denied; |
1da177e4 | 2639 | } |
77eaae8d | 2640 | return nfs_ok; |
1da177e4 LT |
2641 | } |
2642 | ||
dcef0413 | 2643 | static inline struct nfs4_ol_stateid * |
5ac049ac N |
2644 | nfs4_alloc_stateid(void) |
2645 | { | |
2646 | return kmem_cache_alloc(stateid_slab, GFP_KERNEL); | |
2647 | } | |
2648 | ||
21fb4016 BF |
2649 | static inline int nfs4_access_to_access(u32 nfs4_access) |
2650 | { | |
2651 | int flags = 0; | |
2652 | ||
2653 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
2654 | flags |= NFSD_MAY_READ; | |
2655 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
2656 | flags |= NFSD_MAY_WRITE; | |
2657 | return flags; | |
2658 | } | |
2659 | ||
0c12eaff CB |
2660 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
2661 | struct svc_fh *cur_fh, struct nfsd4_open *open) | |
f9d7562f BF |
2662 | { |
2663 | __be32 status; | |
0c12eaff CB |
2664 | int oflag = nfs4_access_to_omode(open->op_share_access); |
2665 | int access = nfs4_access_to_access(open->op_share_access); | |
2666 | ||
2667 | /* CLAIM_DELEGATE_CUR is used in response to a broken lease; | |
2668 | * allowing it to break the lease and return EAGAIN leaves the | |
2669 | * client unable to make progress in returning the delegation */ | |
2670 | if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2671 | access |= NFSD_MAY_NOT_BREAK_LEASE; | |
f9d7562f BF |
2672 | |
2673 | if (!fp->fi_fds[oflag]) { | |
2674 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, | |
2675 | &fp->fi_fds[oflag]); | |
f9d7562f BF |
2676 | if (status) |
2677 | return status; | |
2678 | } | |
2679 | nfs4_file_get_access(fp, oflag); | |
2680 | ||
2681 | return nfs_ok; | |
2682 | } | |
2683 | ||
b37ad28b | 2684 | static __be32 |
dcef0413 | 2685 | nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_ol_stateid **stpp, |
f9d7562f BF |
2686 | struct nfs4_file *fp, struct svc_fh *cur_fh, |
2687 | struct nfsd4_open *open) | |
1da177e4 | 2688 | { |
dcef0413 | 2689 | struct nfs4_ol_stateid *stp; |
f9d7562f | 2690 | __be32 status; |
1da177e4 | 2691 | |
5ac049ac | 2692 | stp = nfs4_alloc_stateid(); |
1da177e4 | 2693 | if (stp == NULL) |
3e772463 | 2694 | return nfserr_jukebox; |
1da177e4 | 2695 | |
0c12eaff | 2696 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); |
f9d7562f BF |
2697 | if (status) { |
2698 | kmem_cache_free(stateid_slab, stp); | |
2699 | return status; | |
1da177e4 | 2700 | } |
1da177e4 LT |
2701 | *stpp = stp; |
2702 | return 0; | |
2703 | } | |
2704 | ||
b37ad28b | 2705 | static inline __be32 |
1da177e4 LT |
2706 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
2707 | struct nfsd4_open *open) | |
2708 | { | |
2709 | struct iattr iattr = { | |
2710 | .ia_valid = ATTR_SIZE, | |
2711 | .ia_size = 0, | |
2712 | }; | |
2713 | if (!open->op_truncate) | |
2714 | return 0; | |
2715 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 2716 | return nfserr_inval; |
1da177e4 LT |
2717 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
2718 | } | |
2719 | ||
b37ad28b | 2720 | static __be32 |
dcef0413 | 2721 | 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 | 2722 | { |
7d947842 BF |
2723 | u32 op_share_access = open->op_share_access & ~NFS4_SHARE_WANT_MASK; |
2724 | bool new_access; | |
b37ad28b | 2725 | __be32 status; |
1da177e4 | 2726 | |
7d947842 | 2727 | new_access = !test_bit(op_share_access, &stp->st_access_bmap); |
f9d7562f | 2728 | if (new_access) { |
0c12eaff | 2729 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); |
f9d7562f BF |
2730 | if (status) |
2731 | return status; | |
6c26d08f | 2732 | } |
1da177e4 LT |
2733 | status = nfsd4_truncate(rqstp, cur_fh, open); |
2734 | if (status) { | |
f9d7562f | 2735 | if (new_access) { |
f197c271 | 2736 | int oflag = nfs4_access_to_omode(op_share_access); |
f9d7562f BF |
2737 | nfs4_file_put_access(fp, oflag); |
2738 | } | |
1da177e4 LT |
2739 | return status; |
2740 | } | |
2741 | /* remember the open */ | |
24a0111e | 2742 | __set_bit(op_share_access, &stp->st_access_bmap); |
b55e0ba1 | 2743 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
1da177e4 LT |
2744 | |
2745 | return nfs_ok; | |
2746 | } | |
2747 | ||
2748 | ||
1da177e4 | 2749 | static void |
37515177 | 2750 | nfs4_set_claim_prev(struct nfsd4_open *open) |
1da177e4 | 2751 | { |
dad1c067 | 2752 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
fe0750e5 | 2753 | open->op_openowner->oo_owner.so_client->cl_firststate = 1; |
1da177e4 LT |
2754 | } |
2755 | ||
14a24e99 BF |
2756 | /* Should we give out recallable state?: */ |
2757 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
2758 | { | |
2759 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
2760 | return true; | |
2761 | /* | |
2762 | * In the sessions case, since we don't have to establish a | |
2763 | * separate connection for callbacks, we assume it's OK | |
2764 | * until we hear otherwise: | |
2765 | */ | |
2766 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
2767 | } | |
2768 | ||
22d38c4c BF |
2769 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) |
2770 | { | |
2771 | struct file_lock *fl; | |
2772 | ||
2773 | fl = locks_alloc_lock(); | |
2774 | if (!fl) | |
2775 | return NULL; | |
2776 | locks_init_lock(fl); | |
2777 | fl->fl_lmops = &nfsd_lease_mng_ops; | |
2778 | fl->fl_flags = FL_LEASE; | |
2779 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; | |
2780 | fl->fl_end = OFFSET_MAX; | |
acfdf5c3 | 2781 | fl->fl_owner = (fl_owner_t)(dp->dl_file); |
22d38c4c | 2782 | fl->fl_pid = current->tgid; |
22d38c4c BF |
2783 | return fl; |
2784 | } | |
2785 | ||
edab9782 BF |
2786 | static int nfs4_setlease(struct nfs4_delegation *dp, int flag) |
2787 | { | |
acfdf5c3 | 2788 | struct nfs4_file *fp = dp->dl_file; |
edab9782 BF |
2789 | struct file_lock *fl; |
2790 | int status; | |
2791 | ||
2792 | fl = nfs4_alloc_init_lease(dp, flag); | |
2793 | if (!fl) | |
2794 | return -ENOMEM; | |
acfdf5c3 BF |
2795 | fl->fl_file = find_readable_file(fp); |
2796 | list_add(&dp->dl_perclnt, &dp->dl_client->cl_delegations); | |
2797 | status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); | |
edab9782 | 2798 | if (status) { |
acfdf5c3 | 2799 | list_del_init(&dp->dl_perclnt); |
edab9782 BF |
2800 | locks_free_lock(fl); |
2801 | return -ENOMEM; | |
2802 | } | |
acfdf5c3 BF |
2803 | fp->fi_lease = fl; |
2804 | fp->fi_deleg_file = fl->fl_file; | |
2805 | get_file(fp->fi_deleg_file); | |
2806 | atomic_set(&fp->fi_delegees, 1); | |
2807 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2808 | return 0; | |
2809 | } | |
2810 | ||
2811 | static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag) | |
2812 | { | |
2813 | struct nfs4_file *fp = dp->dl_file; | |
2814 | ||
2815 | if (!fp->fi_lease) | |
2816 | return nfs4_setlease(dp, flag); | |
2817 | spin_lock(&recall_lock); | |
2818 | if (fp->fi_had_conflict) { | |
2819 | spin_unlock(&recall_lock); | |
2820 | return -EAGAIN; | |
2821 | } | |
2822 | atomic_inc(&fp->fi_delegees); | |
2823 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2824 | spin_unlock(&recall_lock); | |
2825 | list_add(&dp->dl_perclnt, &dp->dl_client->cl_delegations); | |
edab9782 BF |
2826 | return 0; |
2827 | } | |
2828 | ||
1da177e4 LT |
2829 | /* |
2830 | * Attempt to hand out a delegation. | |
2831 | */ | |
2832 | static void | |
dcef0413 | 2833 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_ol_stateid *stp) |
1da177e4 LT |
2834 | { |
2835 | struct nfs4_delegation *dp; | |
fe0750e5 | 2836 | struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner); |
14a24e99 | 2837 | int cb_up; |
1da177e4 LT |
2838 | int status, flag = 0; |
2839 | ||
fe0750e5 | 2840 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
1da177e4 | 2841 | flag = NFS4_OPEN_DELEGATE_NONE; |
7b190fec N |
2842 | open->op_recall = 0; |
2843 | switch (open->op_claim_type) { | |
2844 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 2845 | if (!cb_up) |
7b190fec N |
2846 | open->op_recall = 1; |
2847 | flag = open->op_delegate_type; | |
2848 | if (flag == NFS4_OPEN_DELEGATE_NONE) | |
2849 | goto out; | |
2850 | break; | |
2851 | case NFS4_OPEN_CLAIM_NULL: | |
2852 | /* Let's not give out any delegations till everyone's | |
2853 | * had the chance to reclaim theirs.... */ | |
af558e33 | 2854 | if (locks_in_grace()) |
7b190fec | 2855 | goto out; |
dad1c067 | 2856 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
7b190fec N |
2857 | goto out; |
2858 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | |
2859 | flag = NFS4_OPEN_DELEGATE_WRITE; | |
2860 | else | |
2861 | flag = NFS4_OPEN_DELEGATE_READ; | |
2862 | break; | |
2863 | default: | |
2864 | goto out; | |
2865 | } | |
1da177e4 | 2866 | |
fe0750e5 | 2867 | dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh, flag); |
dd239cc0 BF |
2868 | if (dp == NULL) |
2869 | goto out_no_deleg; | |
acfdf5c3 | 2870 | status = nfs4_set_delegation(dp, flag); |
edab9782 | 2871 | if (status) |
dd239cc0 | 2872 | goto out_free; |
1da177e4 | 2873 | |
d5477a8d | 2874 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 2875 | |
8c10cbdb | 2876 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
d5477a8d | 2877 | STATEID_VAL(&dp->dl_stid.sc_stateid)); |
1da177e4 | 2878 | out: |
7b190fec N |
2879 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS |
2880 | && flag == NFS4_OPEN_DELEGATE_NONE | |
2881 | && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) | |
2fdada03 | 2882 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
1da177e4 | 2883 | open->op_delegate_type = flag; |
dd239cc0 BF |
2884 | return; |
2885 | out_free: | |
acfdf5c3 | 2886 | nfs4_put_delegation(dp); |
dd239cc0 BF |
2887 | out_no_deleg: |
2888 | flag = NFS4_OPEN_DELEGATE_NONE; | |
2889 | goto out; | |
1da177e4 LT |
2890 | } |
2891 | ||
2892 | /* | |
2893 | * called with nfs4_lock_state() held. | |
2894 | */ | |
b37ad28b | 2895 | __be32 |
1da177e4 LT |
2896 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
2897 | { | |
6668958f | 2898 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
1da177e4 LT |
2899 | struct nfs4_file *fp = NULL; |
2900 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
dcef0413 | 2901 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 2902 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 2903 | __be32 status; |
1da177e4 LT |
2904 | |
2905 | status = nfserr_inval; | |
d87a8ade | 2906 | if (!access_valid(open->op_share_access, resp->cstate.minorversion) |
ba5a6a19 | 2907 | || !deny_valid(open->op_share_deny)) |
1da177e4 LT |
2908 | goto out; |
2909 | /* | |
2910 | * Lookup file; if found, lookup stateid and check open request, | |
2911 | * and check for delegations in the process of being recalled. | |
2912 | * If not found, create the nfs4_file struct | |
2913 | */ | |
2914 | fp = find_file(ino); | |
2915 | if (fp) { | |
2916 | if ((status = nfs4_check_open(fp, open, &stp))) | |
2917 | goto out; | |
c44c5eeb N |
2918 | status = nfs4_check_deleg(fp, open, &dp); |
2919 | if (status) | |
2920 | goto out; | |
1da177e4 | 2921 | } else { |
c44c5eeb N |
2922 | status = nfserr_bad_stateid; |
2923 | if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2924 | goto out; | |
3e772463 | 2925 | status = nfserr_jukebox; |
1da177e4 LT |
2926 | fp = alloc_init_file(ino); |
2927 | if (fp == NULL) | |
2928 | goto out; | |
2929 | } | |
2930 | ||
2931 | /* | |
2932 | * OPEN the file, or upgrade an existing OPEN. | |
2933 | * If truncate fails, the OPEN fails. | |
2934 | */ | |
2935 | if (stp) { | |
2936 | /* Stateid was found, this is an OPEN upgrade */ | |
f9d7562f | 2937 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
1da177e4 LT |
2938 | if (status) |
2939 | goto out; | |
2940 | } else { | |
f9d7562f | 2941 | status = nfs4_new_open(rqstp, &stp, fp, current_fh, open); |
567d9829 | 2942 | if (status) |
1da177e4 | 2943 | goto out; |
881ea2b1 | 2944 | init_open_stateid(stp, fp, open); |
1da177e4 LT |
2945 | status = nfsd4_truncate(rqstp, current_fh, open); |
2946 | if (status) { | |
2283963f | 2947 | release_open_stateid(stp); |
1da177e4 LT |
2948 | goto out; |
2949 | } | |
2950 | } | |
dcef0413 BF |
2951 | update_stateid(&stp->st_stid.sc_stateid); |
2952 | memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 2953 | |
4dc6ec00 | 2954 | if (nfsd4_has_session(&resp->cstate)) |
dad1c067 | 2955 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
6668958f | 2956 | |
1da177e4 LT |
2957 | /* |
2958 | * Attempt to hand out a delegation. No error return, because the | |
2959 | * OPEN succeeds even if we fail. | |
2960 | */ | |
2961 | nfs4_open_delegation(current_fh, open, stp); | |
2962 | ||
2963 | status = nfs_ok; | |
2964 | ||
8c10cbdb | 2965 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
dcef0413 | 2966 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
1da177e4 | 2967 | out: |
13cd2184 N |
2968 | if (fp) |
2969 | put_nfs4_file(fp); | |
37515177 N |
2970 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
2971 | nfs4_set_claim_prev(open); | |
1da177e4 LT |
2972 | /* |
2973 | * To finish the open response, we just need to set the rflags. | |
2974 | */ | |
2975 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
dad1c067 | 2976 | if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && |
6668958f | 2977 | !nfsd4_has_session(&resp->cstate)) |
1da177e4 LT |
2978 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
2979 | ||
2980 | return status; | |
2981 | } | |
2982 | ||
b37ad28b | 2983 | __be32 |
b591480b BF |
2984 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2985 | clientid_t *clid) | |
1da177e4 LT |
2986 | { |
2987 | struct nfs4_client *clp; | |
b37ad28b | 2988 | __be32 status; |
1da177e4 LT |
2989 | |
2990 | nfs4_lock_state(); | |
2991 | dprintk("process_renew(%08x/%08x): starting\n", | |
2992 | clid->cl_boot, clid->cl_id); | |
2993 | status = nfserr_stale_clientid; | |
2994 | if (STALE_CLIENTID(clid)) | |
2995 | goto out; | |
2996 | clp = find_confirmed_client(clid); | |
2997 | status = nfserr_expired; | |
2998 | if (clp == NULL) { | |
2999 | /* We assume the client took too long to RENEW. */ | |
3000 | dprintk("nfsd4_renew: clientid not found!\n"); | |
3001 | goto out; | |
3002 | } | |
3003 | renew_client(clp); | |
3004 | status = nfserr_cb_path_down; | |
ea1da636 | 3005 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 3006 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
3007 | goto out; |
3008 | status = nfs_ok; | |
3009 | out: | |
3010 | nfs4_unlock_state(); | |
3011 | return status; | |
3012 | } | |
3013 | ||
c47d832b | 3014 | static struct lock_manager nfsd4_manager = { |
af558e33 BF |
3015 | }; |
3016 | ||
a76b4319 | 3017 | static void |
af558e33 | 3018 | nfsd4_end_grace(void) |
a76b4319 N |
3019 | { |
3020 | dprintk("NFSD: end of grace period\n"); | |
c7b9a459 | 3021 | nfsd4_recdir_purge_old(); |
af558e33 | 3022 | locks_end_grace(&nfsd4_manager); |
e46b498c BF |
3023 | /* |
3024 | * Now that every NFSv4 client has had the chance to recover and | |
3025 | * to see the (possibly new, possibly shorter) lease time, we | |
3026 | * can safely set the next grace time to the current lease time: | |
3027 | */ | |
3028 | nfsd4_grace = nfsd4_lease; | |
a76b4319 N |
3029 | } |
3030 | ||
fd39ca9a | 3031 | static time_t |
1da177e4 LT |
3032 | nfs4_laundromat(void) |
3033 | { | |
3034 | struct nfs4_client *clp; | |
fe0750e5 | 3035 | struct nfs4_openowner *oo; |
1da177e4 LT |
3036 | struct nfs4_delegation *dp; |
3037 | struct list_head *pos, *next, reaplist; | |
cf07d2ea BF |
3038 | time_t cutoff = get_seconds() - nfsd4_lease; |
3039 | time_t t, clientid_val = nfsd4_lease; | |
3040 | time_t u, test_val = nfsd4_lease; | |
1da177e4 LT |
3041 | |
3042 | nfs4_lock_state(); | |
3043 | ||
3044 | dprintk("NFSD: laundromat service - starting\n"); | |
af558e33 BF |
3045 | if (locks_in_grace()) |
3046 | nfsd4_end_grace(); | |
36acb66b BH |
3047 | INIT_LIST_HEAD(&reaplist); |
3048 | spin_lock(&client_lock); | |
1da177e4 LT |
3049 | list_for_each_safe(pos, next, &client_lru) { |
3050 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
3051 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
3052 | t = clp->cl_time - cutoff; | |
3053 | if (clientid_val > t) | |
3054 | clientid_val = t; | |
3055 | break; | |
3056 | } | |
d7682988 BH |
3057 | if (atomic_read(&clp->cl_refcount)) { |
3058 | dprintk("NFSD: client in use (clientid %08x)\n", | |
3059 | clp->cl_clientid.cl_id); | |
3060 | continue; | |
3061 | } | |
3062 | unhash_client_locked(clp); | |
3063 | list_add(&clp->cl_lru, &reaplist); | |
36acb66b BH |
3064 | } |
3065 | spin_unlock(&client_lock); | |
3066 | list_for_each_safe(pos, next, &reaplist) { | |
3067 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
3068 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
3069 | clp->cl_clientid.cl_id); | |
c7b9a459 | 3070 | nfsd4_remove_clid_dir(clp); |
1da177e4 LT |
3071 | expire_client(clp); |
3072 | } | |
1da177e4 LT |
3073 | spin_lock(&recall_lock); |
3074 | list_for_each_safe(pos, next, &del_recall_lru) { | |
3075 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3076 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
3077 | u = dp->dl_time - cutoff; | |
3078 | if (test_val > u) | |
3079 | test_val = u; | |
3080 | break; | |
3081 | } | |
1da177e4 LT |
3082 | list_move(&dp->dl_recall_lru, &reaplist); |
3083 | } | |
3084 | spin_unlock(&recall_lock); | |
3085 | list_for_each_safe(pos, next, &reaplist) { | |
3086 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3087 | list_del_init(&dp->dl_recall_lru); | |
3088 | unhash_delegation(dp); | |
3089 | } | |
cf07d2ea | 3090 | test_val = nfsd4_lease; |
1da177e4 | 3091 | list_for_each_safe(pos, next, &close_lru) { |
fe0750e5 BF |
3092 | oo = container_of(pos, struct nfs4_openowner, oo_close_lru); |
3093 | if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { | |
3094 | u = oo->oo_time - cutoff; | |
1da177e4 LT |
3095 | if (test_val > u) |
3096 | test_val = u; | |
3097 | break; | |
3098 | } | |
3099 | dprintk("NFSD: purging unused open stateowner (so_id %d)\n", | |
fe0750e5 BF |
3100 | oo->oo_owner.so_id); |
3101 | release_openowner(oo); | |
1da177e4 LT |
3102 | } |
3103 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
3104 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
3105 | nfs4_unlock_state(); | |
3106 | return clientid_val; | |
3107 | } | |
3108 | ||
a254b246 HH |
3109 | static struct workqueue_struct *laundry_wq; |
3110 | static void laundromat_main(struct work_struct *); | |
3111 | static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); | |
3112 | ||
3113 | static void | |
c4028958 | 3114 | laundromat_main(struct work_struct *not_used) |
1da177e4 LT |
3115 | { |
3116 | time_t t; | |
3117 | ||
3118 | t = nfs4_laundromat(); | |
3119 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); | |
58da282b | 3120 | queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); |
1da177e4 LT |
3121 | } |
3122 | ||
fe0750e5 | 3123 | static struct nfs4_openowner * search_close_lru(u32 st_id) |
f8816512 | 3124 | { |
fe0750e5 | 3125 | struct nfs4_openowner *local; |
1da177e4 | 3126 | |
fe0750e5 BF |
3127 | list_for_each_entry(local, &close_lru, oo_close_lru) { |
3128 | if (local->oo_owner.so_id == st_id) | |
f4dee24c | 3129 | return local; |
1da177e4 LT |
3130 | } |
3131 | return NULL; | |
3132 | } | |
3133 | ||
3134 | static inline int | |
dcef0413 | 3135 | nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) |
1da177e4 | 3136 | { |
f9d7562f | 3137 | return fhp->fh_dentry->d_inode != stp->st_file->fi_inode; |
1da177e4 LT |
3138 | } |
3139 | ||
3140 | static int | |
3141 | STALE_STATEID(stateid_t *stateid) | |
3142 | { | |
e4e83ea4 BF |
3143 | if (stateid->si_boot == boot_time) |
3144 | return 0; | |
3145 | dprintk("NFSD: stale stateid " STATEID_FMT "!\n", | |
8c10cbdb | 3146 | STATEID_VAL(stateid)); |
e4e83ea4 | 3147 | return 1; |
1da177e4 LT |
3148 | } |
3149 | ||
3150 | static inline int | |
3151 | access_permit_read(unsigned long access_bmap) | |
3152 | { | |
3153 | return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || | |
3154 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || | |
3155 | test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); | |
3156 | } | |
3157 | ||
3158 | static inline int | |
3159 | access_permit_write(unsigned long access_bmap) | |
3160 | { | |
3161 | return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || | |
3162 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); | |
3163 | } | |
3164 | ||
3165 | static | |
dcef0413 | 3166 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
1da177e4 | 3167 | { |
b37ad28b | 3168 | __be32 status = nfserr_openmode; |
1da177e4 | 3169 | |
02921914 BF |
3170 | /* For lock stateid's, we test the parent open, not the lock: */ |
3171 | if (stp->st_openstp) | |
3172 | stp = stp->st_openstp; | |
1da177e4 LT |
3173 | if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) |
3174 | goto out; | |
3175 | if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) | |
3176 | goto out; | |
3177 | status = nfs_ok; | |
3178 | out: | |
3179 | return status; | |
3180 | } | |
3181 | ||
b37ad28b | 3182 | static inline __be32 |
1da177e4 LT |
3183 | check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) |
3184 | { | |
203a8c8e | 3185 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 3186 | return nfs_ok; |
af558e33 | 3187 | else if (locks_in_grace()) { |
25985edc | 3188 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
3189 | * conflicting state; so we must wait out the grace period. */ |
3190 | return nfserr_grace; | |
3191 | } else if (flags & WR_STATE) | |
3192 | return nfs4_share_conflict(current_fh, | |
3193 | NFS4_SHARE_DENY_WRITE); | |
3194 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
3195 | return nfs4_share_conflict(current_fh, | |
3196 | NFS4_SHARE_DENY_READ); | |
3197 | } | |
3198 | ||
3199 | /* | |
3200 | * Allow READ/WRITE during grace period on recovered state only for files | |
3201 | * that are not able to provide mandatory locking. | |
3202 | */ | |
3203 | static inline int | |
18f82731 | 3204 | grace_disallows_io(struct inode *inode) |
1da177e4 | 3205 | { |
203a8c8e | 3206 | return locks_in_grace() && mandatory_lock(inode); |
1da177e4 LT |
3207 | } |
3208 | ||
81b82965 BF |
3209 | /* Returns true iff a is later than b: */ |
3210 | static bool stateid_generation_after(stateid_t *a, stateid_t *b) | |
3211 | { | |
3212 | return (s32)a->si_generation - (s32)b->si_generation > 0; | |
3213 | } | |
3214 | ||
28dde241 | 3215 | static int check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 3216 | { |
6668958f AA |
3217 | /* |
3218 | * When sessions are used the stateid generation number is ignored | |
3219 | * when it is zero. | |
3220 | */ | |
28dde241 | 3221 | if (has_session && in->si_generation == 0) |
81b82965 BF |
3222 | return nfs_ok; |
3223 | ||
3224 | if (in->si_generation == ref->si_generation) | |
3225 | return nfs_ok; | |
6668958f | 3226 | |
0836f587 | 3227 | /* If the client sends us a stateid from the future, it's buggy: */ |
81b82965 | 3228 | if (stateid_generation_after(in, ref)) |
0836f587 BF |
3229 | return nfserr_bad_stateid; |
3230 | /* | |
81b82965 BF |
3231 | * However, we could see a stateid from the past, even from a |
3232 | * non-buggy client. For example, if the client sends a lock | |
3233 | * while some IO is outstanding, the lock may bump si_generation | |
3234 | * while the IO is still in flight. The client could avoid that | |
3235 | * situation by waiting for responses on all the IO requests, | |
3236 | * but better performance may result in retrying IO that | |
3237 | * receives an old_stateid error if requests are rarely | |
3238 | * reordered in flight: | |
0836f587 | 3239 | */ |
81b82965 | 3240 | return nfserr_old_stateid; |
0836f587 BF |
3241 | } |
3242 | ||
3e633079 BF |
3243 | static int is_delegation_stateid(stateid_t *stateid) |
3244 | { | |
3245 | return stateid->si_fileid == 0; | |
3246 | } | |
3247 | ||
28dde241 | 3248 | __be32 nfs4_validate_stateid(stateid_t *stateid, bool has_session) |
17456804 | 3249 | { |
97b7e3b6 BF |
3250 | struct nfs4_stid *s; |
3251 | struct nfs4_ol_stateid *ols; | |
3252 | __be32 status; | |
17456804 BS |
3253 | |
3254 | if (STALE_STATEID(stateid)) | |
97b7e3b6 | 3255 | return nfserr_stale_stateid; |
17456804 | 3256 | |
97b7e3b6 BF |
3257 | s = find_stateid(stateid); |
3258 | if (!s) | |
3259 | return nfserr_stale_stateid; | |
3260 | status = check_stateid_generation(stateid, &s->sc_stateid, has_session); | |
17456804 | 3261 | if (status) |
97b7e3b6 BF |
3262 | return status; |
3263 | if (!(s->sc_type & (NFS4_OPEN_STID | NFS4_LOCK_STID))) | |
3264 | return nfs_ok; | |
3265 | ols = openlockstateid(s); | |
3266 | if (ols->st_stateowner->so_is_open_owner | |
dad1c067 | 3267 | && !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
97b7e3b6 BF |
3268 | return nfserr_bad_stateid; |
3269 | return nfs_ok; | |
17456804 BS |
3270 | } |
3271 | ||
1da177e4 LT |
3272 | /* |
3273 | * Checks for stateid operations | |
3274 | */ | |
b37ad28b | 3275 | __be32 |
dd453dfd BH |
3276 | nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, |
3277 | stateid_t *stateid, int flags, struct file **filpp) | |
1da177e4 | 3278 | { |
69064a27 | 3279 | struct nfs4_stid *s; |
dcef0413 | 3280 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 3281 | struct nfs4_delegation *dp = NULL; |
dd453dfd | 3282 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 3283 | struct inode *ino = current_fh->fh_dentry->d_inode; |
b37ad28b | 3284 | __be32 status; |
1da177e4 | 3285 | |
1da177e4 LT |
3286 | if (filpp) |
3287 | *filpp = NULL; | |
3288 | ||
18f82731 | 3289 | if (grace_disallows_io(ino)) |
1da177e4 LT |
3290 | return nfserr_grace; |
3291 | ||
3292 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3293 | return check_special_stateids(current_fh, stateid, flags); | |
3294 | ||
1da177e4 LT |
3295 | status = nfserr_stale_stateid; |
3296 | if (STALE_STATEID(stateid)) | |
3297 | goto out; | |
3298 | ||
33515142 BF |
3299 | /* |
3300 | * We assume that any stateid that has the current boot time, | |
3301 | * but that we can't find, is expired: | |
3302 | */ | |
3303 | status = nfserr_expired; | |
69064a27 BF |
3304 | s = find_stateid(stateid); |
3305 | if (!s) | |
3306 | goto out; | |
3307 | status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); | |
3308 | if (status) | |
3309 | goto out; | |
3310 | if (s->sc_type == NFS4_DELEG_STID) { | |
3311 | dp = delegstateid(s); | |
dc9bf700 BF |
3312 | status = nfs4_check_delegmode(dp, flags); |
3313 | if (status) | |
3314 | goto out; | |
3315 | renew_client(dp->dl_client); | |
43b0178e | 3316 | if (filpp) { |
acfdf5c3 | 3317 | *filpp = dp->dl_file->fi_deleg_file; |
43b0178e DC |
3318 | BUG_ON(!*filpp); |
3319 | } | |
1da177e4 | 3320 | } else { /* open or lock stateid */ |
69064a27 | 3321 | stp = openlockstateid(s); |
33515142 | 3322 | status = nfserr_bad_stateid; |
6150ef0d | 3323 | if (nfs4_check_fh(current_fh, stp)) |
1da177e4 | 3324 | goto out; |
fe0750e5 | 3325 | if (stp->st_stateowner->so_is_open_owner |
dad1c067 | 3326 | && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
1da177e4 | 3327 | goto out; |
a4455be0 BF |
3328 | status = nfs4_check_openmode(stp, flags); |
3329 | if (status) | |
1da177e4 LT |
3330 | goto out; |
3331 | renew_client(stp->st_stateowner->so_client); | |
f9d7562f BF |
3332 | if (filpp) { |
3333 | if (flags & RD_STATE) | |
3334 | *filpp = find_readable_file(stp->st_file); | |
3335 | else | |
3336 | *filpp = find_writeable_file(stp->st_file); | |
f9d7562f | 3337 | } |
1da177e4 LT |
3338 | } |
3339 | status = nfs_ok; | |
3340 | out: | |
3341 | return status; | |
3342 | } | |
3343 | ||
e1ca12df BS |
3344 | static __be32 |
3345 | nfsd4_free_delegation_stateid(stateid_t *stateid) | |
3346 | { | |
f459e453 | 3347 | struct nfs4_delegation *dp = find_deleg_stateid(stateid); |
e1ca12df BS |
3348 | if (dp) |
3349 | return nfserr_locks_held; | |
f459e453 | 3350 | |
e1ca12df BS |
3351 | return nfserr_bad_stateid; |
3352 | } | |
3353 | ||
3354 | static __be32 | |
dcef0413 | 3355 | nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) |
e1ca12df | 3356 | { |
fe0750e5 | 3357 | if (check_for_locks(stp->st_file, lockowner(stp->st_stateowner))) |
e1ca12df BS |
3358 | return nfserr_locks_held; |
3359 | release_lock_stateid(stp); | |
3360 | return nfs_ok; | |
3361 | } | |
3362 | ||
17456804 BS |
3363 | /* |
3364 | * Test if the stateid is valid | |
3365 | */ | |
3366 | __be32 | |
3367 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3368 | struct nfsd4_test_stateid *test_stateid) | |
3369 | { | |
3370 | test_stateid->ts_has_session = nfsd4_has_session(cstate); | |
3371 | return nfs_ok; | |
3372 | } | |
3373 | ||
e1ca12df BS |
3374 | /* |
3375 | * Free a state id | |
3376 | */ | |
3377 | __be32 | |
3378 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3379 | struct nfsd4_free_stateid *free_stateid) | |
3380 | { | |
3381 | stateid_t *stateid = &free_stateid->fr_stateid; | |
dcef0413 | 3382 | struct nfs4_ol_stateid *stp; |
e1ca12df BS |
3383 | __be32 ret; |
3384 | ||
3385 | nfs4_lock_state(); | |
3386 | if (is_delegation_stateid(stateid)) { | |
3387 | ret = nfsd4_free_delegation_stateid(stateid); | |
3388 | goto out; | |
3389 | } | |
3390 | ||
f459e453 | 3391 | stp = find_ol_stateid(stateid); |
e1ca12df BS |
3392 | if (!stp) { |
3393 | ret = nfserr_bad_stateid; | |
3394 | goto out; | |
3395 | } | |
dcef0413 | 3396 | ret = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, 1); |
81b82965 BF |
3397 | if (ret) |
3398 | goto out; | |
e1ca12df | 3399 | |
dcef0413 | 3400 | if (stp->st_stid.sc_type == NFS4_OPEN_STID) { |
e1ca12df BS |
3401 | ret = nfserr_locks_held; |
3402 | goto out; | |
3403 | } else { | |
3404 | ret = nfsd4_free_lock_stateid(stp); | |
3405 | goto out; | |
3406 | } | |
3407 | ||
3408 | out: | |
3409 | nfs4_unlock_state(); | |
3410 | return ret; | |
3411 | } | |
3412 | ||
4c4cd222 N |
3413 | static inline int |
3414 | setlkflg (int type) | |
3415 | { | |
3416 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
3417 | RD_STATE : WR_STATE; | |
3418 | } | |
1da177e4 | 3419 | |
c0a5d93e BF |
3420 | static __be32 nfs4_nospecial_stateid_checks(stateid_t *stateid) |
3421 | { | |
3422 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3423 | return nfserr_bad_stateid; | |
3424 | if (STALE_STATEID(stateid)) | |
3425 | return nfserr_stale_stateid; | |
3426 | return nfs_ok; | |
3427 | } | |
3428 | ||
dcef0413 | 3429 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
c0a5d93e BF |
3430 | { |
3431 | struct svc_fh *current_fh = &cstate->current_fh; | |
3432 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
3433 | __be32 status; | |
3434 | ||
3435 | if (nfs4_check_fh(current_fh, stp)) | |
3436 | return nfserr_bad_stateid; | |
3437 | status = nfsd4_check_seqid(cstate, sop, seqid); | |
3438 | if (status) | |
3439 | return status; | |
dcef0413 | 3440 | return check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); |
c0a5d93e BF |
3441 | } |
3442 | ||
1da177e4 LT |
3443 | /* |
3444 | * Checks for sequence id mutating operations. | |
3445 | */ | |
b37ad28b | 3446 | static __be32 |
dd453dfd | 3447 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2288d0e3 | 3448 | stateid_t *stateid, char typemask, |
dcef0413 | 3449 | struct nfs4_ol_stateid **stpp) |
1da177e4 | 3450 | { |
0836f587 | 3451 | __be32 status; |
1da177e4 | 3452 | |
8c10cbdb BH |
3453 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
3454 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 3455 | |
1da177e4 | 3456 | *stpp = NULL; |
c0a5d93e BF |
3457 | status = nfs4_nospecial_stateid_checks(stateid); |
3458 | if (status) | |
3459 | return status; | |
f459e453 | 3460 | *stpp = find_ol_stateid_by_type(stateid, typemask); |
f4dee24c BF |
3461 | if (*stpp == NULL) |
3462 | return nfserr_expired; | |
c0a5d93e BF |
3463 | cstate->replay_owner = (*stpp)->st_stateowner; |
3464 | renew_client((*stpp)->st_stateowner->so_client); | |
1da177e4 | 3465 | |
c0a5d93e BF |
3466 | return nfs4_seqid_op_checks(cstate, stateid, seqid, *stpp); |
3467 | } | |
39325bd0 | 3468 | |
dcef0413 | 3469 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, stateid_t *stateid, struct nfs4_ol_stateid **stpp) |
c0a5d93e BF |
3470 | { |
3471 | __be32 status; | |
3472 | struct nfs4_openowner *oo; | |
1da177e4 | 3473 | |
c0a5d93e | 3474 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
2288d0e3 | 3475 | NFS4_OPEN_STID, stpp); |
7a8711c9 BF |
3476 | if (status) |
3477 | return status; | |
c0a5d93e | 3478 | oo = openowner((*stpp)->st_stateowner); |
dad1c067 | 3479 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) |
3a4f98bb | 3480 | return nfserr_bad_stateid; |
3a4f98bb | 3481 | return nfs_ok; |
1da177e4 LT |
3482 | } |
3483 | ||
b37ad28b | 3484 | __be32 |
ca364317 | 3485 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3486 | struct nfsd4_open_confirm *oc) |
1da177e4 | 3487 | { |
b37ad28b | 3488 | __be32 status; |
fe0750e5 | 3489 | struct nfs4_openowner *oo; |
dcef0413 | 3490 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
3491 | |
3492 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | |
ca364317 BF |
3493 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3494 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3495 | |
ca364317 | 3496 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
3497 | if (status) |
3498 | return status; | |
1da177e4 LT |
3499 | |
3500 | nfs4_lock_state(); | |
3501 | ||
9072d5c6 | 3502 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3503 | oc->oc_seqid, &oc->oc_req_stateid, |
2288d0e3 | 3504 | NFS4_OPEN_STID, &stp); |
9072d5c6 | 3505 | if (status) |
68b66e82 | 3506 | goto out; |
fe0750e5 | 3507 | oo = openowner(stp->st_stateowner); |
68b66e82 | 3508 | status = nfserr_bad_stateid; |
dad1c067 | 3509 | if (oo->oo_flags & NFS4_OO_CONFIRMED) |
68b66e82 | 3510 | goto out; |
dad1c067 | 3511 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
dcef0413 BF |
3512 | update_stateid(&stp->st_stid.sc_stateid); |
3513 | memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
8c10cbdb | 3514 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
dcef0413 | 3515 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); |
c7b9a459 | 3516 | |
fe0750e5 | 3517 | nfsd4_create_clid_dir(oo->oo_owner.so_client); |
68b66e82 | 3518 | status = nfs_ok; |
1da177e4 | 3519 | out: |
5ec094c1 BF |
3520 | if (!cstate->replay_owner) |
3521 | nfs4_unlock_state(); | |
1da177e4 LT |
3522 | return status; |
3523 | } | |
3524 | ||
dcef0413 | 3525 | static inline void nfs4_file_downgrade(struct nfs4_ol_stateid *stp, unsigned int to_access) |
1da177e4 LT |
3526 | { |
3527 | int i; | |
f197c271 | 3528 | |
1da177e4 | 3529 | for (i = 1; i < 4; i++) { |
f197c271 BF |
3530 | if (test_bit(i, &stp->st_access_bmap) && !(i & to_access)) { |
3531 | nfs4_file_put_access(stp->st_file, i); | |
3532 | __clear_bit(i, &stp->st_access_bmap); | |
3533 | } | |
1da177e4 LT |
3534 | } |
3535 | } | |
3536 | ||
3537 | static void | |
3538 | reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) | |
3539 | { | |
3540 | int i; | |
3541 | for (i = 0; i < 4; i++) { | |
3542 | if ((i & deny) != i) | |
3543 | __clear_bit(i, bmap); | |
3544 | } | |
3545 | } | |
3546 | ||
b37ad28b | 3547 | __be32 |
ca364317 BF |
3548 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
3549 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 3550 | struct nfsd4_open_downgrade *od) |
1da177e4 | 3551 | { |
b37ad28b | 3552 | __be32 status; |
dcef0413 | 3553 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
3554 | |
3555 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | |
ca364317 BF |
3556 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3557 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3558 | |
d87a8ade | 3559 | if (!access_valid(od->od_share_access, cstate->minorversion) |
ba5a6a19 | 3560 | || !deny_valid(od->od_share_deny)) |
1da177e4 LT |
3561 | return nfserr_inval; |
3562 | ||
3563 | nfs4_lock_state(); | |
c0a5d93e BF |
3564 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
3565 | &od->od_stateid, &stp); | |
9072d5c6 | 3566 | if (status) |
1da177e4 | 3567 | goto out; |
1da177e4 LT |
3568 | status = nfserr_inval; |
3569 | if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { | |
3570 | dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
3571 | stp->st_access_bmap, od->od_share_access); | |
3572 | goto out; | |
3573 | } | |
3574 | if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { | |
3575 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", | |
3576 | stp->st_deny_bmap, od->od_share_deny); | |
3577 | goto out; | |
3578 | } | |
f197c271 | 3579 | nfs4_file_downgrade(stp, od->od_share_access); |
1da177e4 | 3580 | |
1da177e4 LT |
3581 | reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); |
3582 | ||
dcef0413 BF |
3583 | update_stateid(&stp->st_stid.sc_stateid); |
3584 | memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
3585 | status = nfs_ok; |
3586 | out: | |
5ec094c1 BF |
3587 | if (!cstate->replay_owner) |
3588 | nfs4_unlock_state(); | |
1da177e4 LT |
3589 | return status; |
3590 | } | |
3591 | ||
3592 | /* | |
3593 | * nfs4_unlock_state() called after encode | |
3594 | */ | |
b37ad28b | 3595 | __be32 |
ca364317 | 3596 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3597 | struct nfsd4_close *close) |
1da177e4 | 3598 | { |
b37ad28b | 3599 | __be32 status; |
fe0750e5 | 3600 | struct nfs4_openowner *oo; |
dcef0413 | 3601 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
3602 | |
3603 | dprintk("NFSD: nfsd4_close on file %.*s\n", | |
ca364317 BF |
3604 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3605 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 LT |
3606 | |
3607 | nfs4_lock_state(); | |
3608 | /* check close_lru for replay */ | |
c0a5d93e BF |
3609 | status = nfs4_preprocess_confirmed_seqid_op(cstate, close->cl_seqid, |
3610 | &close->cl_stateid, &stp); | |
f4dee24c BF |
3611 | if (stp == NULL && status == nfserr_expired) { |
3612 | /* | |
3613 | * Also, we should make sure this isn't just the result of | |
3614 | * a replayed close: | |
3615 | */ | |
fe0750e5 | 3616 | oo = search_close_lru(close->cl_stateid.si_stateownerid); |
f4dee24c | 3617 | /* It's not stale; let's assume it's expired: */ |
fe0750e5 | 3618 | if (oo == NULL) |
f4dee24c | 3619 | goto out; |
fe0750e5 BF |
3620 | cstate->replay_owner = &oo->oo_owner; |
3621 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, close->cl_seqid); | |
f4dee24c BF |
3622 | if (status) |
3623 | goto out; | |
3624 | status = nfserr_bad_seqid; | |
3625 | } | |
9072d5c6 | 3626 | if (status) |
1da177e4 | 3627 | goto out; |
fe0750e5 | 3628 | oo = openowner(stp->st_stateowner); |
1da177e4 | 3629 | status = nfs_ok; |
dcef0413 BF |
3630 | update_stateid(&stp->st_stid.sc_stateid); |
3631 | memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3632 | |
04ef5954 | 3633 | /* release_stateid() calls nfsd_close() if needed */ |
2283963f | 3634 | release_open_stateid(stp); |
04ef5954 BF |
3635 | |
3636 | /* place unused nfs4_stateowners on so_close_lru list to be | |
3637 | * released by the laundromat service after the lease period | |
3638 | * to enable us to handle CLOSE replay | |
3639 | */ | |
fe0750e5 BF |
3640 | if (list_empty(&oo->oo_owner.so_stateids)) |
3641 | move_to_close_lru(oo); | |
1da177e4 | 3642 | out: |
5ec094c1 BF |
3643 | if (!cstate->replay_owner) |
3644 | nfs4_unlock_state(); | |
1da177e4 LT |
3645 | return status; |
3646 | } | |
3647 | ||
b37ad28b | 3648 | __be32 |
ca364317 BF |
3649 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3650 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 3651 | { |
203a8c8e BF |
3652 | struct nfs4_delegation *dp; |
3653 | stateid_t *stateid = &dr->dr_stateid; | |
3654 | struct inode *inode; | |
b37ad28b | 3655 | __be32 status; |
1da177e4 | 3656 | |
ca364317 | 3657 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e BF |
3658 | return status; |
3659 | inode = cstate->current_fh.fh_dentry->d_inode; | |
1da177e4 LT |
3660 | |
3661 | nfs4_lock_state(); | |
203a8c8e BF |
3662 | status = nfserr_bad_stateid; |
3663 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3664 | goto out; | |
3665 | status = nfserr_stale_stateid; | |
3666 | if (STALE_STATEID(stateid)) | |
3667 | goto out; | |
7e0f7cf5 | 3668 | status = nfserr_bad_stateid; |
203a8c8e BF |
3669 | if (!is_delegation_stateid(stateid)) |
3670 | goto out; | |
33515142 | 3671 | status = nfserr_expired; |
f459e453 | 3672 | dp = find_deleg_stateid(stateid); |
e4e83ea4 | 3673 | if (!dp) |
203a8c8e | 3674 | goto out; |
d5477a8d | 3675 | status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); |
203a8c8e BF |
3676 | if (status) |
3677 | goto out; | |
3678 | renew_client(dp->dl_client); | |
3679 | ||
3680 | unhash_delegation(dp); | |
1da177e4 | 3681 | out: |
203a8c8e BF |
3682 | nfs4_unlock_state(); |
3683 | ||
1da177e4 LT |
3684 | return status; |
3685 | } | |
3686 | ||
3687 | ||
3688 | /* | |
3689 | * Lock owner state (byte-range locks) | |
3690 | */ | |
3691 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) | |
3692 | #define LOCK_HASH_BITS 8 | |
3693 | #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) | |
3694 | #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) | |
3695 | ||
87df4de8 BH |
3696 | static inline u64 |
3697 | end_offset(u64 start, u64 len) | |
3698 | { | |
3699 | u64 end; | |
3700 | ||
3701 | end = start + len; | |
3702 | return end >= start ? end: NFS4_MAX_UINT64; | |
3703 | } | |
3704 | ||
3705 | /* last octet in a range */ | |
3706 | static inline u64 | |
3707 | last_byte_offset(u64 start, u64 len) | |
3708 | { | |
3709 | u64 end; | |
3710 | ||
3711 | BUG_ON(!len); | |
3712 | end = start + len; | |
3713 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
3714 | } | |
3715 | ||
ddc04c41 BF |
3716 | static unsigned int lockownerid_hashval(u32 id) |
3717 | { | |
3718 | return id & LOCK_HASH_MASK; | |
3719 | } | |
1da177e4 LT |
3720 | |
3721 | static inline unsigned int | |
3722 | lock_ownerstr_hashval(struct inode *inode, u32 cl_id, | |
3723 | struct xdr_netobj *ownername) | |
3724 | { | |
3725 | return (file_hashval(inode) + cl_id | |
3726 | + opaque_hashval(ownername->data, ownername->len)) | |
3727 | & LOCK_HASH_MASK; | |
3728 | } | |
3729 | ||
3730 | static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; | |
3731 | static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; | |
1da177e4 | 3732 | |
1da177e4 LT |
3733 | /* |
3734 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
3735 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
3736 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
3737 | * locking, this prevents us from being completely protocol-compliant. The | |
3738 | * real solution to this problem is to start using unsigned file offsets in | |
3739 | * the VFS, but this is a very deep change! | |
3740 | */ | |
3741 | static inline void | |
3742 | nfs4_transform_lock_offset(struct file_lock *lock) | |
3743 | { | |
3744 | if (lock->fl_start < 0) | |
3745 | lock->fl_start = OFFSET_MAX; | |
3746 | if (lock->fl_end < 0) | |
3747 | lock->fl_end = OFFSET_MAX; | |
3748 | } | |
3749 | ||
d5b9026a N |
3750 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
3751 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 3752 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 3753 | }; |
1da177e4 LT |
3754 | |
3755 | static inline void | |
3756 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
3757 | { | |
fe0750e5 | 3758 | struct nfs4_lockowner *lo; |
1da177e4 | 3759 | |
d5b9026a | 3760 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 BF |
3761 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
3762 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, | |
3763 | lo->lo_owner.so_owner.len, GFP_KERNEL); | |
7c13f344 BF |
3764 | if (!deny->ld_owner.data) |
3765 | /* We just don't care that much */ | |
3766 | goto nevermind; | |
fe0750e5 BF |
3767 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
3768 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; | |
d5b9026a | 3769 | } else { |
7c13f344 BF |
3770 | nevermind: |
3771 | deny->ld_owner.len = 0; | |
3772 | deny->ld_owner.data = NULL; | |
d5b9026a N |
3773 | deny->ld_clientid.cl_boot = 0; |
3774 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
3775 | } |
3776 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
3777 | deny->ld_length = NFS4_MAX_UINT64; |
3778 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
3779 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
3780 | deny->ld_type = NFS4_READ_LT; | |
3781 | if (fl->fl_type != F_RDLCK) | |
3782 | deny->ld_type = NFS4_WRITE_LT; | |
3783 | } | |
3784 | ||
fe0750e5 BF |
3785 | static struct nfs4_lockowner * |
3786 | find_lockowner_str(struct inode *inode, clientid_t *clid, | |
1da177e4 LT |
3787 | struct xdr_netobj *owner) |
3788 | { | |
3789 | unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); | |
3790 | struct nfs4_stateowner *op; | |
3791 | ||
3792 | list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { | |
599e0a22 | 3793 | if (same_owner_str(op, owner, clid)) |
fe0750e5 | 3794 | return lockowner(op); |
1da177e4 LT |
3795 | } |
3796 | return NULL; | |
3797 | } | |
3798 | ||
dcef0413 | 3799 | static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp) |
ff194bd9 BF |
3800 | { |
3801 | unsigned int idhashval; | |
3802 | ||
fe0750e5 BF |
3803 | idhashval = lockownerid_hashval(lo->lo_owner.so_id); |
3804 | list_add(&lo->lo_owner.so_idhash, &lock_ownerid_hashtbl[idhashval]); | |
3805 | list_add(&lo->lo_owner.so_strhash, &lock_ownerstr_hashtbl[strhashval]); | |
3806 | list_add(&lo->lo_perstateid, &open_stp->st_lockowners); | |
ff194bd9 BF |
3807 | } |
3808 | ||
1da177e4 LT |
3809 | /* |
3810 | * Alloc a lock owner structure. | |
3811 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 3812 | * occurred. |
1da177e4 LT |
3813 | * |
3814 | * strhashval = lock_ownerstr_hashval | |
1da177e4 LT |
3815 | */ |
3816 | ||
fe0750e5 | 3817 | static struct nfs4_lockowner * |
dcef0413 | 3818 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) { |
fe0750e5 | 3819 | struct nfs4_lockowner *lo; |
1da177e4 | 3820 | |
fe0750e5 BF |
3821 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
3822 | if (!lo) | |
1da177e4 | 3823 | return NULL; |
fe0750e5 BF |
3824 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
3825 | lo->lo_owner.so_is_open_owner = 0; | |
b59e3c0e NB |
3826 | /* It is the openowner seqid that will be incremented in encode in the |
3827 | * case of new lockowners; so increment the lock seqid manually: */ | |
fe0750e5 BF |
3828 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; |
3829 | hash_lockowner(lo, strhashval, clp, open_stp); | |
3830 | return lo; | |
1da177e4 LT |
3831 | } |
3832 | ||
dcef0413 BF |
3833 | static struct nfs4_ol_stateid * |
3834 | alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 3835 | { |
dcef0413 | 3836 | struct nfs4_ol_stateid *stp; |
1da177e4 | 3837 | |
5ac049ac N |
3838 | stp = nfs4_alloc_stateid(); |
3839 | if (stp == NULL) | |
1da177e4 | 3840 | goto out; |
8beefa24 | 3841 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 BF |
3842 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
3843 | stp->st_stateowner = &lo->lo_owner; | |
dcef0413 | 3844 | stp->st_stid.sc_type = NFS4_LOCK_STID; |
13cd2184 | 3845 | get_nfs4_file(fp); |
1da177e4 | 3846 | stp->st_file = fp; |
dcef0413 BF |
3847 | stp->st_stid.sc_stateid.si_boot = boot_time; |
3848 | stp->st_stid.sc_stateid.si_stateownerid = lo->lo_owner.so_id; | |
3849 | stp->st_stid.sc_stateid.si_fileid = fp->fi_id; | |
73997dc4 | 3850 | /* note will be incremented before first return to client: */ |
dcef0413 | 3851 | stp->st_stid.sc_stateid.si_generation = 0; |
36d44c60 | 3852 | hash_stid(&stp->st_stid); |
0997b173 | 3853 | stp->st_access_bmap = 0; |
1da177e4 | 3854 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 3855 | stp->st_openstp = open_stp; |
1da177e4 LT |
3856 | |
3857 | out: | |
3858 | return stp; | |
3859 | } | |
3860 | ||
fd39ca9a | 3861 | static int |
1da177e4 LT |
3862 | check_lock_length(u64 offset, u64 length) |
3863 | { | |
87df4de8 | 3864 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
3865 | LOFF_OVERFLOW(offset, length))); |
3866 | } | |
3867 | ||
dcef0413 | 3868 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 BF |
3869 | { |
3870 | struct nfs4_file *fp = lock_stp->st_file; | |
3871 | int oflag = nfs4_access_to_omode(access); | |
3872 | ||
3873 | if (test_bit(access, &lock_stp->st_access_bmap)) | |
3874 | return; | |
3875 | nfs4_file_get_access(fp, oflag); | |
3876 | __set_bit(access, &lock_stp->st_access_bmap); | |
3877 | } | |
3878 | ||
1da177e4 LT |
3879 | /* |
3880 | * LOCK operation | |
3881 | */ | |
b37ad28b | 3882 | __be32 |
ca364317 | 3883 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3884 | struct nfsd4_lock *lock) |
1da177e4 | 3885 | { |
fe0750e5 BF |
3886 | struct nfs4_openowner *open_sop = NULL; |
3887 | struct nfs4_lockowner *lock_sop = NULL; | |
dcef0413 | 3888 | struct nfs4_ol_stateid *lock_stp; |
7d947842 BF |
3889 | struct nfs4_file *fp; |
3890 | struct file *filp = NULL; | |
1da177e4 | 3891 | struct file_lock file_lock; |
8dc7c311 | 3892 | struct file_lock conflock; |
b37ad28b | 3893 | __be32 status = 0; |
1da177e4 | 3894 | unsigned int strhashval; |
b34f27aa | 3895 | int lkflg; |
b8dd7b9a | 3896 | int err; |
1da177e4 LT |
3897 | |
3898 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
3899 | (long long) lock->lk_offset, | |
3900 | (long long) lock->lk_length); | |
3901 | ||
1da177e4 LT |
3902 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
3903 | return nfserr_inval; | |
3904 | ||
ca364317 | 3905 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 3906 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
3907 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
3908 | return status; | |
3909 | } | |
3910 | ||
1da177e4 LT |
3911 | nfs4_lock_state(); |
3912 | ||
3913 | if (lock->lk_is_new) { | |
893f8770 N |
3914 | /* |
3915 | * Client indicates that this is a new lockowner. | |
3916 | * Use open owner and open stateid to create lock owner and | |
3917 | * lock stateid. | |
3918 | */ | |
dcef0413 | 3919 | struct nfs4_ol_stateid *open_stp = NULL; |
1da177e4 LT |
3920 | |
3921 | status = nfserr_stale_clientid; | |
60adfc50 AA |
3922 | if (!nfsd4_has_session(cstate) && |
3923 | STALE_CLIENTID(&lock->lk_new_clientid)) | |
1da177e4 | 3924 | goto out; |
1da177e4 | 3925 | |
1da177e4 | 3926 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 3927 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
3928 | lock->lk_new_open_seqid, |
3929 | &lock->lk_new_open_stateid, | |
c0a5d93e | 3930 | &open_stp); |
37515177 | 3931 | if (status) |
1da177e4 | 3932 | goto out; |
fe0750e5 | 3933 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 3934 | status = nfserr_bad_stateid; |
b34f27aa | 3935 | if (!nfsd4_has_session(cstate) && |
fe0750e5 | 3936 | !same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
b34f27aa BF |
3937 | &lock->v.new.clientid)) |
3938 | goto out; | |
1da177e4 LT |
3939 | /* create lockowner and lock stateid */ |
3940 | fp = open_stp->st_file; | |
fe0750e5 BF |
3941 | strhashval = lock_ownerstr_hashval(fp->fi_inode, |
3942 | open_sop->oo_owner.so_client->cl_clientid.cl_id, | |
1da177e4 | 3943 | &lock->v.new.owner); |
3e9e3dbe N |
3944 | /* XXX: Do we need to check for duplicate stateowners on |
3945 | * the same file, or should they just be allowed (and | |
3946 | * create new stateids)? */ | |
3e772463 | 3947 | status = nfserr_jukebox; |
b59e3c0e | 3948 | lock_sop = alloc_init_lock_stateowner(strhashval, |
fe0750e5 | 3949 | open_sop->oo_owner.so_client, open_stp, lock); |
b59e3c0e | 3950 | if (lock_sop == NULL) |
1da177e4 | 3951 | goto out; |
b59e3c0e | 3952 | lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); |
8a280510 | 3953 | if (lock_stp == NULL) |
1da177e4 | 3954 | goto out; |
1da177e4 LT |
3955 | } else { |
3956 | /* lock (lock owner + lock stateid) already exists */ | |
dd453dfd | 3957 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
3958 | lock->lk_old_lock_seqid, |
3959 | &lock->lk_old_lock_stateid, | |
2288d0e3 | 3960 | NFS4_LOCK_STID, &lock_stp); |
1da177e4 LT |
3961 | if (status) |
3962 | goto out; | |
fe0750e5 | 3963 | lock_sop = lockowner(lock_stp->st_stateowner); |
7d947842 | 3964 | fp = lock_stp->st_file; |
1da177e4 | 3965 | } |
9072d5c6 | 3966 | /* lock_sop and lock_stp have been created or found */ |
1da177e4 | 3967 | |
b34f27aa BF |
3968 | lkflg = setlkflg(lock->lk_type); |
3969 | status = nfs4_check_openmode(lock_stp, lkflg); | |
3970 | if (status) | |
3971 | goto out; | |
3972 | ||
0dd395dc | 3973 | status = nfserr_grace; |
af558e33 | 3974 | if (locks_in_grace() && !lock->lk_reclaim) |
0dd395dc N |
3975 | goto out; |
3976 | status = nfserr_no_grace; | |
af558e33 | 3977 | if (!locks_in_grace() && lock->lk_reclaim) |
0dd395dc N |
3978 | goto out; |
3979 | ||
1da177e4 LT |
3980 | locks_init_lock(&file_lock); |
3981 | switch (lock->lk_type) { | |
3982 | case NFS4_READ_LT: | |
3983 | case NFS4_READW_LT: | |
0997b173 BF |
3984 | filp = find_readable_file(lock_stp->st_file); |
3985 | if (filp) | |
3986 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
1da177e4 | 3987 | file_lock.fl_type = F_RDLCK; |
529d7b2a | 3988 | break; |
1da177e4 LT |
3989 | case NFS4_WRITE_LT: |
3990 | case NFS4_WRITEW_LT: | |
0997b173 BF |
3991 | filp = find_writeable_file(lock_stp->st_file); |
3992 | if (filp) | |
3993 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
1da177e4 | 3994 | file_lock.fl_type = F_WRLCK; |
529d7b2a | 3995 | break; |
1da177e4 LT |
3996 | default: |
3997 | status = nfserr_inval; | |
3998 | goto out; | |
3999 | } | |
f9d7562f BF |
4000 | if (!filp) { |
4001 | status = nfserr_openmode; | |
4002 | goto out; | |
4003 | } | |
b59e3c0e | 4004 | file_lock.fl_owner = (fl_owner_t)lock_sop; |
1da177e4 LT |
4005 | file_lock.fl_pid = current->tgid; |
4006 | file_lock.fl_file = filp; | |
4007 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 4008 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
4009 | |
4010 | file_lock.fl_start = lock->lk_offset; | |
87df4de8 | 4011 | file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); |
1da177e4 LT |
4012 | nfs4_transform_lock_offset(&file_lock); |
4013 | ||
4014 | /* | |
4015 | * Try to lock the file in the VFS. | |
4016 | * Note: locks.c uses the BKL to protect the inode's lock list. | |
4017 | */ | |
4018 | ||
529d7b2a | 4019 | err = vfs_lock_file(filp, F_SETLK, &file_lock, &conflock); |
b8dd7b9a | 4020 | switch (-err) { |
1da177e4 | 4021 | case 0: /* success! */ |
dcef0413 BF |
4022 | update_stateid(&lock_stp->st_stid.sc_stateid); |
4023 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, | |
1da177e4 | 4024 | sizeof(stateid_t)); |
b8dd7b9a | 4025 | status = 0; |
eb76b3fd AA |
4026 | break; |
4027 | case (EAGAIN): /* conflock holds conflicting lock */ | |
4028 | status = nfserr_denied; | |
4029 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
4030 | nfs4_set_lock_denied(&conflock, &lock->lk_denied); | |
4031 | break; | |
1da177e4 LT |
4032 | case (EDEADLK): |
4033 | status = nfserr_deadlock; | |
eb76b3fd | 4034 | break; |
3e772463 | 4035 | default: |
fd85b817 | 4036 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 4037 | status = nfserrno(err); |
eb76b3fd | 4038 | break; |
1da177e4 | 4039 | } |
1da177e4 | 4040 | out: |
8a280510 | 4041 | if (status && lock->lk_is_new && lock_sop) |
f044ff83 | 4042 | release_lockowner(lock_sop); |
5ec094c1 BF |
4043 | if (!cstate->replay_owner) |
4044 | nfs4_unlock_state(); | |
1da177e4 LT |
4045 | return status; |
4046 | } | |
4047 | ||
55ef1274 BF |
4048 | /* |
4049 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
4050 | * so we do a temporary open here just to get an open file to pass to | |
4051 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
4052 | * inode operation.) | |
4053 | */ | |
4054 | static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) | |
4055 | { | |
4056 | struct file *file; | |
4057 | int err; | |
4058 | ||
4059 | err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); | |
4060 | if (err) | |
4061 | return err; | |
4062 | err = vfs_test_lock(file, lock); | |
4063 | nfsd_close(file); | |
4064 | return err; | |
4065 | } | |
4066 | ||
1da177e4 LT |
4067 | /* |
4068 | * LOCKT operation | |
4069 | */ | |
b37ad28b | 4070 | __be32 |
ca364317 BF |
4071 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4072 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
4073 | { |
4074 | struct inode *inode; | |
1da177e4 | 4075 | struct file_lock file_lock; |
fe0750e5 | 4076 | struct nfs4_lockowner *lo; |
fd85b817 | 4077 | int error; |
b37ad28b | 4078 | __be32 status; |
1da177e4 | 4079 | |
af558e33 | 4080 | if (locks_in_grace()) |
1da177e4 LT |
4081 | return nfserr_grace; |
4082 | ||
4083 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
4084 | return nfserr_inval; | |
4085 | ||
1da177e4 LT |
4086 | nfs4_lock_state(); |
4087 | ||
4088 | status = nfserr_stale_clientid; | |
60adfc50 | 4089 | if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) |
1da177e4 | 4090 | goto out; |
1da177e4 | 4091 | |
75c096f7 | 4092 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 4093 | goto out; |
1da177e4 | 4094 | |
ca364317 | 4095 | inode = cstate->current_fh.fh_dentry->d_inode; |
1da177e4 LT |
4096 | locks_init_lock(&file_lock); |
4097 | switch (lockt->lt_type) { | |
4098 | case NFS4_READ_LT: | |
4099 | case NFS4_READW_LT: | |
4100 | file_lock.fl_type = F_RDLCK; | |
4101 | break; | |
4102 | case NFS4_WRITE_LT: | |
4103 | case NFS4_WRITEW_LT: | |
4104 | file_lock.fl_type = F_WRLCK; | |
4105 | break; | |
4106 | default: | |
2fdada03 | 4107 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
4108 | status = nfserr_inval; |
4109 | goto out; | |
4110 | } | |
4111 | ||
fe0750e5 BF |
4112 | lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner); |
4113 | if (lo) | |
4114 | file_lock.fl_owner = (fl_owner_t)lo; | |
1da177e4 LT |
4115 | file_lock.fl_pid = current->tgid; |
4116 | file_lock.fl_flags = FL_POSIX; | |
4117 | ||
4118 | file_lock.fl_start = lockt->lt_offset; | |
87df4de8 | 4119 | file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); |
1da177e4 LT |
4120 | |
4121 | nfs4_transform_lock_offset(&file_lock); | |
4122 | ||
1da177e4 | 4123 | status = nfs_ok; |
55ef1274 | 4124 | error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); |
fd85b817 ME |
4125 | if (error) { |
4126 | status = nfserrno(error); | |
4127 | goto out; | |
4128 | } | |
9d6a8c5c | 4129 | if (file_lock.fl_type != F_UNLCK) { |
1da177e4 | 4130 | status = nfserr_denied; |
9d6a8c5c | 4131 | nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); |
1da177e4 LT |
4132 | } |
4133 | out: | |
4134 | nfs4_unlock_state(); | |
4135 | return status; | |
4136 | } | |
4137 | ||
b37ad28b | 4138 | __be32 |
ca364317 | 4139 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4140 | struct nfsd4_locku *locku) |
1da177e4 | 4141 | { |
dcef0413 | 4142 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
4143 | struct file *filp = NULL; |
4144 | struct file_lock file_lock; | |
b37ad28b | 4145 | __be32 status; |
b8dd7b9a | 4146 | int err; |
1da177e4 LT |
4147 | |
4148 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", | |
4149 | (long long) locku->lu_offset, | |
4150 | (long long) locku->lu_length); | |
4151 | ||
4152 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
4153 | return nfserr_inval; | |
4154 | ||
4155 | nfs4_lock_state(); | |
4156 | ||
9072d5c6 | 4157 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
2288d0e3 | 4158 | &locku->lu_stateid, NFS4_LOCK_STID, &stp); |
9072d5c6 | 4159 | if (status) |
1da177e4 | 4160 | goto out; |
f9d7562f BF |
4161 | filp = find_any_file(stp->st_file); |
4162 | if (!filp) { | |
4163 | status = nfserr_lock_range; | |
4164 | goto out; | |
4165 | } | |
1da177e4 LT |
4166 | BUG_ON(!filp); |
4167 | locks_init_lock(&file_lock); | |
4168 | file_lock.fl_type = F_UNLCK; | |
fe0750e5 | 4169 | file_lock.fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); |
1da177e4 LT |
4170 | file_lock.fl_pid = current->tgid; |
4171 | file_lock.fl_file = filp; | |
4172 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 4173 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
4174 | file_lock.fl_start = locku->lu_offset; |
4175 | ||
87df4de8 | 4176 | file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); |
1da177e4 LT |
4177 | nfs4_transform_lock_offset(&file_lock); |
4178 | ||
4179 | /* | |
4180 | * Try to unlock the file in the VFS. | |
4181 | */ | |
fd85b817 | 4182 | err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); |
b8dd7b9a | 4183 | if (err) { |
fd85b817 | 4184 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
4185 | goto out_nfserr; |
4186 | } | |
4187 | /* | |
4188 | * OK, unlock succeeded; the only thing left to do is update the stateid. | |
4189 | */ | |
dcef0413 BF |
4190 | update_stateid(&stp->st_stid.sc_stateid); |
4191 | memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
4192 | |
4193 | out: | |
1da177e4 LT |
4194 | nfs4_unlock_state(); |
4195 | return status; | |
4196 | ||
4197 | out_nfserr: | |
b8dd7b9a | 4198 | status = nfserrno(err); |
1da177e4 LT |
4199 | goto out; |
4200 | } | |
4201 | ||
4202 | /* | |
4203 | * returns | |
4204 | * 1: locks held by lockowner | |
4205 | * 0: no locks held by lockowner | |
4206 | */ | |
4207 | static int | |
fe0750e5 | 4208 | check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner) |
1da177e4 LT |
4209 | { |
4210 | struct file_lock **flpp; | |
f9d7562f | 4211 | struct inode *inode = filp->fi_inode; |
1da177e4 LT |
4212 | int status = 0; |
4213 | ||
b89f4321 | 4214 | lock_flocks(); |
1da177e4 | 4215 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
796dadfd | 4216 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
4217 | status = 1; |
4218 | goto out; | |
796dadfd | 4219 | } |
1da177e4 LT |
4220 | } |
4221 | out: | |
b89f4321 | 4222 | unlock_flocks(); |
1da177e4 LT |
4223 | return status; |
4224 | } | |
4225 | ||
b37ad28b | 4226 | __be32 |
b591480b BF |
4227 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
4228 | struct nfsd4_compound_state *cstate, | |
4229 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
4230 | { |
4231 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe | 4232 | struct nfs4_stateowner *sop; |
fe0750e5 | 4233 | struct nfs4_lockowner *lo; |
dcef0413 | 4234 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4235 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe N |
4236 | struct list_head matches; |
4237 | int i; | |
b37ad28b | 4238 | __be32 status; |
1da177e4 LT |
4239 | |
4240 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
4241 | clid->cl_boot, clid->cl_id); | |
4242 | ||
4243 | /* XXX check for lease expiration */ | |
4244 | ||
4245 | status = nfserr_stale_clientid; | |
849823c5 | 4246 | if (STALE_CLIENTID(clid)) |
1da177e4 | 4247 | return status; |
1da177e4 LT |
4248 | |
4249 | nfs4_lock_state(); | |
4250 | ||
3e9e3dbe N |
4251 | status = nfserr_locks_held; |
4252 | /* XXX: we're doing a linear search through all the lockowners. | |
4253 | * Yipes! For now we'll just hope clients aren't really using | |
4254 | * release_lockowner much, but eventually we have to fix these | |
4255 | * data structures. */ | |
4256 | INIT_LIST_HEAD(&matches); | |
4257 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
4258 | list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { | |
599e0a22 | 4259 | if (!same_owner_str(sop, owner, clid)) |
3e9e3dbe N |
4260 | continue; |
4261 | list_for_each_entry(stp, &sop->so_stateids, | |
4262 | st_perstateowner) { | |
fe0750e5 BF |
4263 | lo = lockowner(sop); |
4264 | if (check_for_locks(stp->st_file, lo)) | |
3e9e3dbe | 4265 | goto out; |
fe0750e5 | 4266 | list_add(&lo->lo_list, &matches); |
3e9e3dbe | 4267 | } |
1da177e4 | 4268 | } |
3e9e3dbe N |
4269 | } |
4270 | /* Clients probably won't expect us to return with some (but not all) | |
4271 | * of the lockowner state released; so don't release any until all | |
4272 | * have been checked. */ | |
4273 | status = nfs_ok; | |
0fa822e4 | 4274 | while (!list_empty(&matches)) { |
fe0750e5 BF |
4275 | lo = list_entry(matches.next, struct nfs4_lockowner, |
4276 | lo_list); | |
0fa822e4 N |
4277 | /* unhash_stateowner deletes so_perclient only |
4278 | * for openowners. */ | |
fe0750e5 BF |
4279 | list_del(&lo->lo_list); |
4280 | release_lockowner(lo); | |
1da177e4 LT |
4281 | } |
4282 | out: | |
4283 | nfs4_unlock_state(); | |
4284 | return status; | |
4285 | } | |
4286 | ||
4287 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 4288 | alloc_reclaim(void) |
1da177e4 | 4289 | { |
a55370a3 | 4290 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
4291 | } |
4292 | ||
c7b9a459 | 4293 | int |
a1bcecd2 | 4294 | nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) |
c7b9a459 N |
4295 | { |
4296 | unsigned int strhashval = clientstr_hashval(name); | |
4297 | struct nfs4_client *clp; | |
4298 | ||
e203d506 | 4299 | clp = find_confirmed_client_by_str(name, strhashval); |
c7b9a459 N |
4300 | return clp ? 1 : 0; |
4301 | } | |
4302 | ||
1da177e4 LT |
4303 | /* |
4304 | * failure => all reset bets are off, nfserr_no_grace... | |
4305 | */ | |
190e4fbf N |
4306 | int |
4307 | nfs4_client_to_reclaim(const char *name) | |
1da177e4 LT |
4308 | { |
4309 | unsigned int strhashval; | |
4310 | struct nfs4_client_reclaim *crp = NULL; | |
4311 | ||
a55370a3 N |
4312 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
4313 | crp = alloc_reclaim(); | |
1da177e4 LT |
4314 | if (!crp) |
4315 | return 0; | |
a55370a3 | 4316 | strhashval = clientstr_hashval(name); |
1da177e4 LT |
4317 | INIT_LIST_HEAD(&crp->cr_strhash); |
4318 | list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); | |
a55370a3 | 4319 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
1da177e4 LT |
4320 | reclaim_str_hashtbl_size++; |
4321 | return 1; | |
4322 | } | |
4323 | ||
4324 | static void | |
4325 | nfs4_release_reclaim(void) | |
4326 | { | |
4327 | struct nfs4_client_reclaim *crp = NULL; | |
4328 | int i; | |
4329 | ||
1da177e4 LT |
4330 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4331 | while (!list_empty(&reclaim_str_hashtbl[i])) { | |
4332 | crp = list_entry(reclaim_str_hashtbl[i].next, | |
4333 | struct nfs4_client_reclaim, cr_strhash); | |
4334 | list_del(&crp->cr_strhash); | |
1da177e4 LT |
4335 | kfree(crp); |
4336 | reclaim_str_hashtbl_size--; | |
4337 | } | |
4338 | } | |
4339 | BUG_ON(reclaim_str_hashtbl_size); | |
4340 | } | |
4341 | ||
4342 | /* | |
4343 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
fd39ca9a | 4344 | static struct nfs4_client_reclaim * |
1da177e4 LT |
4345 | nfs4_find_reclaim_client(clientid_t *clid) |
4346 | { | |
4347 | unsigned int strhashval; | |
4348 | struct nfs4_client *clp; | |
4349 | struct nfs4_client_reclaim *crp = NULL; | |
4350 | ||
4351 | ||
4352 | /* find clientid in conf_id_hashtbl */ | |
4353 | clp = find_confirmed_client(clid); | |
4354 | if (clp == NULL) | |
4355 | return NULL; | |
4356 | ||
a55370a3 N |
4357 | dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", |
4358 | clp->cl_name.len, clp->cl_name.data, | |
4359 | clp->cl_recdir); | |
1da177e4 LT |
4360 | |
4361 | /* find clp->cl_name in reclaim_str_hashtbl */ | |
a55370a3 | 4362 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 | 4363 | list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { |
a55370a3 | 4364 | if (same_name(crp->cr_recdir, clp->cl_recdir)) { |
1da177e4 LT |
4365 | return crp; |
4366 | } | |
4367 | } | |
4368 | return NULL; | |
4369 | } | |
4370 | ||
4371 | /* | |
4372 | * Called from OPEN. Look for clientid in reclaim list. | |
4373 | */ | |
b37ad28b | 4374 | __be32 |
1da177e4 LT |
4375 | nfs4_check_open_reclaim(clientid_t *clid) |
4376 | { | |
dfc83565 | 4377 | return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; |
1da177e4 LT |
4378 | } |
4379 | ||
ac4d8ff2 | 4380 | /* initialization to perform at module load time: */ |
1da177e4 | 4381 | |
e8ff2a84 | 4382 | int |
ac4d8ff2 | 4383 | nfs4_state_init(void) |
1da177e4 | 4384 | { |
e8ff2a84 | 4385 | int i, status; |
1da177e4 | 4386 | |
e8ff2a84 BF |
4387 | status = nfsd4_init_slabs(); |
4388 | if (status) | |
4389 | return status; | |
1da177e4 LT |
4390 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4391 | INIT_LIST_HEAD(&conf_id_hashtbl[i]); | |
4392 | INIT_LIST_HEAD(&conf_str_hashtbl[i]); | |
4393 | INIT_LIST_HEAD(&unconf_str_hashtbl[i]); | |
4394 | INIT_LIST_HEAD(&unconf_id_hashtbl[i]); | |
02cb2858 | 4395 | INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); |
1da177e4 | 4396 | } |
5282fd72 ME |
4397 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
4398 | INIT_LIST_HEAD(&sessionid_hashtbl[i]); | |
1da177e4 LT |
4399 | for (i = 0; i < FILE_HASH_SIZE; i++) { |
4400 | INIT_LIST_HEAD(&file_hashtbl[i]); | |
4401 | } | |
506f275f BF |
4402 | for (i = 0; i < OPEN_OWNER_HASH_SIZE; i++) { |
4403 | INIT_LIST_HEAD(&open_ownerstr_hashtbl[i]); | |
4404 | INIT_LIST_HEAD(&open_ownerid_hashtbl[i]); | |
1da177e4 | 4405 | } |
b79abadd | 4406 | for (i = 0; i < STATEID_HASH_SIZE; i++) |
1da177e4 | 4407 | INIT_LIST_HEAD(&stateid_hashtbl[i]); |
1da177e4 LT |
4408 | for (i = 0; i < LOCK_HASH_SIZE; i++) { |
4409 | INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); | |
4410 | INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); | |
4411 | } | |
1da177e4 | 4412 | memset(&onestateid, ~0, sizeof(stateid_t)); |
1da177e4 LT |
4413 | INIT_LIST_HEAD(&close_lru); |
4414 | INIT_LIST_HEAD(&client_lru); | |
4415 | INIT_LIST_HEAD(&del_recall_lru); | |
ac4d8ff2 | 4416 | reclaim_str_hashtbl_size = 0; |
e8ff2a84 | 4417 | return 0; |
ac4d8ff2 N |
4418 | } |
4419 | ||
190e4fbf N |
4420 | static void |
4421 | nfsd4_load_reboot_recovery_data(void) | |
4422 | { | |
4423 | int status; | |
4424 | ||
0964a3d3 | 4425 | nfs4_lock_state(); |
48483bf2 | 4426 | nfsd4_init_recdir(); |
190e4fbf | 4427 | status = nfsd4_recdir_load(); |
0964a3d3 | 4428 | nfs4_unlock_state(); |
190e4fbf N |
4429 | if (status) |
4430 | printk("NFSD: Failure reading reboot recovery data\n"); | |
4431 | } | |
4432 | ||
c2f1a551 MS |
4433 | /* |
4434 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
4435 | * client may quite reasonably hang on to a delegation as long as it has | |
4436 | * the inode cached. This becomes an obvious problem the first time a | |
4437 | * client's inode cache approaches the size of the server's total memory. | |
4438 | * | |
4439 | * For now we avoid this problem by imposing a hard limit on the number | |
4440 | * of delegations, which varies according to the server's memory size. | |
4441 | */ | |
4442 | static void | |
4443 | set_max_delegations(void) | |
4444 | { | |
4445 | /* | |
4446 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
4447 | * estimates suggest that in the worst case (where every delegation | |
4448 | * is for a different inode), a delegation could take about 1.5K, | |
4449 | * giving a worst case usage of about 6% of memory. | |
4450 | */ | |
4451 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
4452 | } | |
4453 | ||
ac4d8ff2 N |
4454 | /* initialization to perform when the nfsd service is started: */ |
4455 | ||
29ab23cc | 4456 | static int |
ac4d8ff2 N |
4457 | __nfs4_state_start(void) |
4458 | { | |
b5a1a81e BF |
4459 | int ret; |
4460 | ||
1da177e4 | 4461 | boot_time = get_seconds(); |
af558e33 | 4462 | locks_start_grace(&nfsd4_manager); |
9a8db97e | 4463 | printk(KERN_INFO "NFSD: starting %ld-second grace period\n", |
e46b498c | 4464 | nfsd4_grace); |
b5a1a81e BF |
4465 | ret = set_callback_cred(); |
4466 | if (ret) | |
4467 | return -ENOMEM; | |
58da282b | 4468 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
29ab23cc BF |
4469 | if (laundry_wq == NULL) |
4470 | return -ENOMEM; | |
b5a1a81e BF |
4471 | ret = nfsd4_create_callback_queue(); |
4472 | if (ret) | |
4473 | goto out_free_laundry; | |
e46b498c | 4474 | queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); |
c2f1a551 | 4475 | set_max_delegations(); |
b5a1a81e BF |
4476 | return 0; |
4477 | out_free_laundry: | |
4478 | destroy_workqueue(laundry_wq); | |
4479 | return ret; | |
1da177e4 LT |
4480 | } |
4481 | ||
29ab23cc | 4482 | int |
76a3550e | 4483 | nfs4_state_start(void) |
1da177e4 | 4484 | { |
190e4fbf | 4485 | nfsd4_load_reboot_recovery_data(); |
4ad9a344 | 4486 | return __nfs4_state_start(); |
1da177e4 LT |
4487 | } |
4488 | ||
1da177e4 LT |
4489 | static void |
4490 | __nfs4_state_shutdown(void) | |
4491 | { | |
4492 | int i; | |
4493 | struct nfs4_client *clp = NULL; | |
4494 | struct nfs4_delegation *dp = NULL; | |
1da177e4 LT |
4495 | struct list_head *pos, *next, reaplist; |
4496 | ||
1da177e4 LT |
4497 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4498 | while (!list_empty(&conf_id_hashtbl[i])) { | |
4499 | clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
4500 | expire_client(clp); | |
4501 | } | |
4502 | while (!list_empty(&unconf_str_hashtbl[i])) { | |
4503 | clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); | |
4504 | expire_client(clp); | |
4505 | } | |
4506 | } | |
4507 | INIT_LIST_HEAD(&reaplist); | |
4508 | spin_lock(&recall_lock); | |
4509 | list_for_each_safe(pos, next, &del_recall_lru) { | |
4510 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4511 | list_move(&dp->dl_recall_lru, &reaplist); | |
4512 | } | |
4513 | spin_unlock(&recall_lock); | |
4514 | list_for_each_safe(pos, next, &reaplist) { | |
4515 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4516 | list_del_init(&dp->dl_recall_lru); | |
4517 | unhash_delegation(dp); | |
4518 | } | |
4519 | ||
190e4fbf | 4520 | nfsd4_shutdown_recdir(); |
1da177e4 LT |
4521 | } |
4522 | ||
4523 | void | |
4524 | nfs4_state_shutdown(void) | |
4525 | { | |
afe2c511 | 4526 | cancel_delayed_work_sync(&laundromat_work); |
5e8d5c29 | 4527 | destroy_workqueue(laundry_wq); |
2c5e7615 | 4528 | locks_end_grace(&nfsd4_manager); |
1da177e4 LT |
4529 | nfs4_lock_state(); |
4530 | nfs4_release_reclaim(); | |
4531 | __nfs4_state_shutdown(); | |
1da177e4 | 4532 | nfs4_unlock_state(); |
c3935e30 | 4533 | nfsd4_destroy_callback_queue(); |
1da177e4 | 4534 | } |