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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 */ |
fd39ca9a | 63 | static struct nfs4_stateid * find_stateid(stateid_t *stid, int flags); |
e1ca12df | 64 | static struct nfs4_delegation * search_for_delegation(stateid_t *stid); |
1da177e4 | 65 | static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid); |
e1ca12df | 66 | static int check_for_locks(struct nfs4_file *filp, struct nfs4_stateowner *lowner); |
1da177e4 | 67 | |
8b671b80 BF |
68 | /* Locking: */ |
69 | ||
70 | /* Currently used for almost all code touching nfsv4 state: */ | |
353ab6e9 | 71 | static DEFINE_MUTEX(client_mutex); |
1da177e4 | 72 | |
8b671b80 BF |
73 | /* |
74 | * Currently used for the del_recall_lru and file hash table. In an | |
75 | * effort to decrease the scope of the client_mutex, this spinlock may | |
76 | * eventually cover more: | |
77 | */ | |
78 | static DEFINE_SPINLOCK(recall_lock); | |
79 | ||
e18b890b CL |
80 | static struct kmem_cache *stateowner_slab = NULL; |
81 | static struct kmem_cache *file_slab = NULL; | |
82 | static struct kmem_cache *stateid_slab = NULL; | |
83 | static struct kmem_cache *deleg_slab = NULL; | |
e60d4398 | 84 | |
1da177e4 LT |
85 | void |
86 | nfs4_lock_state(void) | |
87 | { | |
353ab6e9 | 88 | mutex_lock(&client_mutex); |
1da177e4 LT |
89 | } |
90 | ||
91 | void | |
92 | nfs4_unlock_state(void) | |
93 | { | |
353ab6e9 | 94 | mutex_unlock(&client_mutex); |
1da177e4 LT |
95 | } |
96 | ||
97 | static inline u32 | |
98 | opaque_hashval(const void *ptr, int nbytes) | |
99 | { | |
100 | unsigned char *cptr = (unsigned char *) ptr; | |
101 | ||
102 | u32 x = 0; | |
103 | while (nbytes--) { | |
104 | x *= 37; | |
105 | x += *cptr++; | |
106 | } | |
107 | return x; | |
108 | } | |
109 | ||
1da177e4 LT |
110 | static struct list_head del_recall_lru; |
111 | ||
13cd2184 N |
112 | static inline void |
113 | put_nfs4_file(struct nfs4_file *fi) | |
114 | { | |
8b671b80 BF |
115 | if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { |
116 | list_del(&fi->fi_hash); | |
117 | spin_unlock(&recall_lock); | |
118 | iput(fi->fi_inode); | |
119 | kmem_cache_free(file_slab, fi); | |
120 | } | |
13cd2184 N |
121 | } |
122 | ||
123 | static inline void | |
124 | get_nfs4_file(struct nfs4_file *fi) | |
125 | { | |
8b671b80 | 126 | atomic_inc(&fi->fi_ref); |
13cd2184 N |
127 | } |
128 | ||
ef0f3390 | 129 | static int num_delegations; |
c2f1a551 | 130 | unsigned int max_delegations; |
ef0f3390 N |
131 | |
132 | /* | |
133 | * Open owner state (share locks) | |
134 | */ | |
135 | ||
506f275f BF |
136 | /* hash tables for open owners */ |
137 | #define OPEN_OWNER_HASH_BITS 8 | |
138 | #define OPEN_OWNER_HASH_SIZE (1 << OPEN_OWNER_HASH_BITS) | |
139 | #define OPEN_OWNER_HASH_MASK (OPEN_OWNER_HASH_SIZE - 1) | |
ef0f3390 | 140 | |
506f275f | 141 | static unsigned int open_ownerid_hashval(const u32 id) |
ddc04c41 | 142 | { |
506f275f | 143 | return id & OPEN_OWNER_HASH_MASK; |
ddc04c41 BF |
144 | } |
145 | ||
506f275f | 146 | static unsigned int open_ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername) |
ddc04c41 BF |
147 | { |
148 | unsigned int ret; | |
149 | ||
150 | ret = opaque_hashval(ownername->data, ownername->len); | |
151 | ret += clientid; | |
506f275f | 152 | return ret & OPEN_OWNER_HASH_MASK; |
ddc04c41 | 153 | } |
ef0f3390 | 154 | |
506f275f BF |
155 | static struct list_head open_ownerid_hashtbl[OPEN_OWNER_HASH_SIZE]; |
156 | static struct list_head open_ownerstr_hashtbl[OPEN_OWNER_HASH_SIZE]; | |
ef0f3390 N |
157 | |
158 | /* hash table for nfs4_file */ | |
159 | #define FILE_HASH_BITS 8 | |
160 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
35079582 | 161 | |
ef0f3390 N |
162 | /* hash table for (open)nfs4_stateid */ |
163 | #define STATEID_HASH_BITS 10 | |
164 | #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS) | |
165 | #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1) | |
166 | ||
ddc04c41 BF |
167 | static unsigned int file_hashval(struct inode *ino) |
168 | { | |
169 | /* XXX: why are we hashing on inode pointer, anyway? */ | |
170 | return hash_ptr(ino, FILE_HASH_BITS); | |
171 | } | |
172 | ||
173 | static unsigned int stateid_hashval(u32 owner_id, u32 file_id) | |
174 | { | |
175 | return (owner_id + file_id) & STATEID_HASH_MASK; | |
176 | } | |
ef0f3390 N |
177 | |
178 | static struct list_head file_hashtbl[FILE_HASH_SIZE]; | |
179 | static struct list_head stateid_hashtbl[STATEID_HASH_SIZE]; | |
180 | ||
998db52c | 181 | static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
f9d7562f BF |
182 | { |
183 | BUG_ON(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR])); | |
184 | atomic_inc(&fp->fi_access[oflag]); | |
185 | } | |
186 | ||
998db52c BF |
187 | static void nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
188 | { | |
189 | if (oflag == O_RDWR) { | |
190 | __nfs4_file_get_access(fp, O_RDONLY); | |
191 | __nfs4_file_get_access(fp, O_WRONLY); | |
192 | } else | |
193 | __nfs4_file_get_access(fp, oflag); | |
194 | } | |
195 | ||
196 | static void nfs4_file_put_fd(struct nfs4_file *fp, int oflag) | |
f9d7562f BF |
197 | { |
198 | if (fp->fi_fds[oflag]) { | |
199 | fput(fp->fi_fds[oflag]); | |
200 | fp->fi_fds[oflag] = NULL; | |
201 | } | |
202 | } | |
203 | ||
998db52c | 204 | static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
f9d7562f BF |
205 | { |
206 | if (atomic_dec_and_test(&fp->fi_access[oflag])) { | |
207 | nfs4_file_put_fd(fp, O_RDWR); | |
208 | nfs4_file_put_fd(fp, oflag); | |
209 | } | |
210 | } | |
211 | ||
998db52c BF |
212 | static void nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
213 | { | |
214 | if (oflag == O_RDWR) { | |
215 | __nfs4_file_put_access(fp, O_RDONLY); | |
216 | __nfs4_file_put_access(fp, O_WRONLY); | |
217 | } else | |
218 | __nfs4_file_put_access(fp, oflag); | |
219 | } | |
220 | ||
1da177e4 LT |
221 | static struct nfs4_delegation * |
222 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type) | |
223 | { | |
224 | struct nfs4_delegation *dp; | |
225 | struct nfs4_file *fp = stp->st_file; | |
1da177e4 LT |
226 | |
227 | dprintk("NFSD alloc_init_deleg\n"); | |
c3e48080 BF |
228 | /* |
229 | * Major work on the lease subsystem (for example, to support | |
230 | * calbacks on stat) will be required before we can support | |
231 | * write delegations properly. | |
232 | */ | |
233 | if (type != NFS4_OPEN_DELEGATE_READ) | |
234 | return NULL; | |
47f9940c MS |
235 | if (fp->fi_had_conflict) |
236 | return NULL; | |
c2f1a551 | 237 | if (num_delegations > max_delegations) |
ef0f3390 | 238 | return NULL; |
5b2d21c1 N |
239 | dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); |
240 | if (dp == NULL) | |
1da177e4 | 241 | return dp; |
ef0f3390 | 242 | num_delegations++; |
ea1da636 N |
243 | INIT_LIST_HEAD(&dp->dl_perfile); |
244 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 LT |
245 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
246 | dp->dl_client = clp; | |
13cd2184 | 247 | get_nfs4_file(fp); |
1da177e4 | 248 | dp->dl_file = fp; |
1da177e4 | 249 | dp->dl_type = type; |
e4e83ea4 | 250 | dp->dl_stateid.si_boot = boot_time; |
1da177e4 LT |
251 | dp->dl_stateid.si_stateownerid = current_delegid++; |
252 | dp->dl_stateid.si_fileid = 0; | |
73997dc4 | 253 | dp->dl_stateid.si_generation = 1; |
6c02eaa1 | 254 | fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); |
1da177e4 LT |
255 | dp->dl_time = 0; |
256 | atomic_set(&dp->dl_count, 1); | |
b5a1a81e | 257 | INIT_WORK(&dp->dl_recall.cb_work, nfsd4_do_callback_rpc); |
1da177e4 LT |
258 | return dp; |
259 | } | |
260 | ||
261 | void | |
262 | nfs4_put_delegation(struct nfs4_delegation *dp) | |
263 | { | |
264 | if (atomic_dec_and_test(&dp->dl_count)) { | |
265 | dprintk("NFSD: freeing dp %p\n",dp); | |
13cd2184 | 266 | put_nfs4_file(dp->dl_file); |
5b2d21c1 | 267 | kmem_cache_free(deleg_slab, dp); |
ef0f3390 | 268 | num_delegations--; |
1da177e4 LT |
269 | } |
270 | } | |
271 | ||
acfdf5c3 | 272 | static void nfs4_put_deleg_lease(struct nfs4_file *fp) |
1da177e4 | 273 | { |
acfdf5c3 BF |
274 | if (atomic_dec_and_test(&fp->fi_delegees)) { |
275 | vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); | |
276 | fp->fi_lease = NULL; | |
4ee63624 | 277 | fput(fp->fi_deleg_file); |
acfdf5c3 BF |
278 | fp->fi_deleg_file = NULL; |
279 | } | |
1da177e4 LT |
280 | } |
281 | ||
282 | /* Called under the state lock. */ | |
283 | static void | |
284 | unhash_delegation(struct nfs4_delegation *dp) | |
285 | { | |
ea1da636 | 286 | list_del_init(&dp->dl_perclnt); |
1da177e4 | 287 | spin_lock(&recall_lock); |
5d926e8c | 288 | list_del_init(&dp->dl_perfile); |
1da177e4 LT |
289 | list_del_init(&dp->dl_recall_lru); |
290 | spin_unlock(&recall_lock); | |
acfdf5c3 | 291 | nfs4_put_deleg_lease(dp->dl_file); |
1da177e4 LT |
292 | nfs4_put_delegation(dp); |
293 | } | |
294 | ||
295 | /* | |
296 | * SETCLIENTID state | |
297 | */ | |
298 | ||
36acb66b | 299 | /* client_lock protects the client lru list and session hash table */ |
9089f1b4 BH |
300 | static DEFINE_SPINLOCK(client_lock); |
301 | ||
1da177e4 LT |
302 | /* Hash tables for nfs4_clientid state */ |
303 | #define CLIENT_HASH_BITS 4 | |
304 | #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) | |
305 | #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) | |
306 | ||
ddc04c41 BF |
307 | static unsigned int clientid_hashval(u32 id) |
308 | { | |
309 | return id & CLIENT_HASH_MASK; | |
310 | } | |
311 | ||
312 | static unsigned int clientstr_hashval(const char *name) | |
313 | { | |
314 | return opaque_hashval(name, 8) & CLIENT_HASH_MASK; | |
315 | } | |
316 | ||
1da177e4 LT |
317 | /* |
318 | * reclaim_str_hashtbl[] holds known client info from previous reset/reboot | |
319 | * used in reboot/reset lease grace period processing | |
320 | * | |
321 | * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed | |
322 | * setclientid_confirmed info. | |
323 | * | |
324 | * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed | |
325 | * setclientid info. | |
326 | * | |
327 | * client_lru holds client queue ordered by nfs4_client.cl_time | |
328 | * for lease renewal. | |
329 | * | |
330 | * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time | |
331 | * for last close replay. | |
332 | */ | |
333 | static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; | |
334 | static int reclaim_str_hashtbl_size = 0; | |
335 | static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; | |
336 | static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; | |
337 | static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; | |
338 | static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; | |
339 | static struct list_head client_lru; | |
340 | static struct list_head close_lru; | |
341 | ||
f9d7562f BF |
342 | /* |
343 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
344 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
345 | * only what share bits are currently in force, but also what | |
346 | * combinations of share bits previous opens have used. This allows us | |
347 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
348 | * return an error if the client attempt to downgrade to a combination | |
349 | * of share bits not explicable by closing some of its previous opens. | |
350 | * | |
351 | * XXX: This enforcement is actually incomplete, since we don't keep | |
352 | * track of access/deny bit combinations; so, e.g., we allow: | |
353 | * | |
354 | * OPEN allow read, deny write | |
355 | * OPEN allow both, deny none | |
356 | * DOWNGRADE allow read, deny none | |
357 | * | |
358 | * which we should reject. | |
359 | */ | |
360 | static void | |
361 | set_access(unsigned int *access, unsigned long bmap) { | |
362 | int i; | |
363 | ||
364 | *access = 0; | |
365 | for (i = 1; i < 4; i++) { | |
366 | if (test_bit(i, &bmap)) | |
367 | *access |= i; | |
368 | } | |
369 | } | |
370 | ||
371 | static void | |
372 | set_deny(unsigned int *deny, unsigned long bmap) { | |
373 | int i; | |
374 | ||
375 | *deny = 0; | |
376 | for (i = 0; i < 4; i++) { | |
377 | if (test_bit(i, &bmap)) | |
378 | *deny |= i ; | |
379 | } | |
380 | } | |
381 | ||
382 | static int | |
383 | test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { | |
384 | unsigned int access, deny; | |
385 | ||
386 | set_access(&access, stp->st_access_bmap); | |
387 | set_deny(&deny, stp->st_deny_bmap); | |
388 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) | |
389 | return 0; | |
390 | return 1; | |
391 | } | |
392 | ||
393 | static int nfs4_access_to_omode(u32 access) | |
394 | { | |
8f34a430 | 395 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
396 | case NFS4_SHARE_ACCESS_READ: |
397 | return O_RDONLY; | |
398 | case NFS4_SHARE_ACCESS_WRITE: | |
399 | return O_WRONLY; | |
400 | case NFS4_SHARE_ACCESS_BOTH: | |
401 | return O_RDWR; | |
402 | } | |
403 | BUG(); | |
404 | } | |
405 | ||
529d7b2a BF |
406 | static void unhash_generic_stateid(struct nfs4_stateid *stp) |
407 | { | |
408 | list_del(&stp->st_hash); | |
409 | list_del(&stp->st_perfile); | |
410 | list_del(&stp->st_perstateowner); | |
411 | } | |
412 | ||
413 | static void free_generic_stateid(struct nfs4_stateid *stp) | |
414 | { | |
499f3edc | 415 | int i; |
0997b173 | 416 | |
23fcf2ec | 417 | if (stp->st_access_bmap) { |
499f3edc BF |
418 | for (i = 1; i < 4; i++) { |
419 | if (test_bit(i, &stp->st_access_bmap)) | |
420 | nfs4_file_put_access(stp->st_file, | |
421 | nfs4_access_to_omode(i)); | |
422 | } | |
23fcf2ec | 423 | } |
a96e5b90 | 424 | put_nfs4_file(stp->st_file); |
529d7b2a BF |
425 | kmem_cache_free(stateid_slab, stp); |
426 | } | |
427 | ||
428 | static void release_lock_stateid(struct nfs4_stateid *stp) | |
429 | { | |
430 | struct file *file; | |
431 | ||
432 | unhash_generic_stateid(stp); | |
433 | file = find_any_file(stp->st_file); | |
434 | if (file) | |
435 | locks_remove_posix(file, (fl_owner_t)stp->st_stateowner); | |
436 | free_generic_stateid(stp); | |
437 | } | |
438 | ||
439 | static void unhash_lockowner(struct nfs4_stateowner *sop) | |
440 | { | |
441 | struct nfs4_stateid *stp; | |
442 | ||
443 | list_del(&sop->so_idhash); | |
444 | list_del(&sop->so_strhash); | |
445 | list_del(&sop->so_perstateid); | |
446 | while (!list_empty(&sop->so_stateids)) { | |
447 | stp = list_first_entry(&sop->so_stateids, | |
448 | struct nfs4_stateid, st_perstateowner); | |
449 | release_lock_stateid(stp); | |
450 | } | |
451 | } | |
452 | ||
453 | static void release_lockowner(struct nfs4_stateowner *sop) | |
454 | { | |
455 | unhash_lockowner(sop); | |
456 | nfs4_put_stateowner(sop); | |
457 | } | |
458 | ||
459 | static void | |
460 | release_stateid_lockowners(struct nfs4_stateid *open_stp) | |
461 | { | |
462 | struct nfs4_stateowner *lock_sop; | |
463 | ||
464 | while (!list_empty(&open_stp->st_lockowners)) { | |
465 | lock_sop = list_entry(open_stp->st_lockowners.next, | |
466 | struct nfs4_stateowner, so_perstateid); | |
467 | /* list_del(&open_stp->st_lockowners); */ | |
468 | BUG_ON(lock_sop->so_is_open_owner); | |
469 | release_lockowner(lock_sop); | |
470 | } | |
471 | } | |
472 | ||
2283963f BF |
473 | static void release_open_stateid(struct nfs4_stateid *stp) |
474 | { | |
475 | unhash_generic_stateid(stp); | |
476 | release_stateid_lockowners(stp); | |
2283963f BF |
477 | free_generic_stateid(stp); |
478 | } | |
479 | ||
f044ff83 | 480 | static void unhash_openowner(struct nfs4_stateowner *sop) |
f1d110ca BF |
481 | { |
482 | struct nfs4_stateid *stp; | |
483 | ||
484 | list_del(&sop->so_idhash); | |
485 | list_del(&sop->so_strhash); | |
f044ff83 BF |
486 | list_del(&sop->so_perclient); |
487 | list_del(&sop->so_perstateid); /* XXX: necessary? */ | |
f1d110ca | 488 | while (!list_empty(&sop->so_stateids)) { |
f044ff83 BF |
489 | stp = list_first_entry(&sop->so_stateids, |
490 | struct nfs4_stateid, st_perstateowner); | |
491 | release_open_stateid(stp); | |
f1d110ca BF |
492 | } |
493 | } | |
494 | ||
f044ff83 | 495 | static void release_openowner(struct nfs4_stateowner *sop) |
f1d110ca | 496 | { |
f044ff83 | 497 | unhash_openowner(sop); |
f1d110ca BF |
498 | list_del(&sop->so_close_lru); |
499 | nfs4_put_stateowner(sop); | |
500 | } | |
501 | ||
5282fd72 ME |
502 | #define SESSION_HASH_SIZE 512 |
503 | static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; | |
504 | ||
505 | static inline int | |
506 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
507 | { | |
508 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
509 | ||
510 | return sid->sequence % SESSION_HASH_SIZE; | |
511 | } | |
512 | ||
513 | static inline void | |
514 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
515 | { | |
516 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
517 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
518 | } | |
519 | ||
ec6b5d7b AA |
520 | static void |
521 | gen_sessionid(struct nfsd4_session *ses) | |
522 | { | |
523 | struct nfs4_client *clp = ses->se_client; | |
524 | struct nfsd4_sessionid *sid; | |
525 | ||
526 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
527 | sid->clientid = clp->cl_clientid; | |
528 | sid->sequence = current_sessionid++; | |
529 | sid->reserved = 0; | |
530 | } | |
531 | ||
532 | /* | |
a649637c AA |
533 | * The protocol defines ca_maxresponssize_cached to include the size of |
534 | * the rpc header, but all we need to cache is the data starting after | |
535 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
536 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
537 | * value that is the number of bytes in our cache plus a few additional | |
538 | * bytes. In order to stay on the safe side, and not promise more than | |
539 | * we can cache, those additional bytes must be the minimum possible: 24 | |
540 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
541 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
542 | * for the SEQUENCE op response: | |
543 | */ | |
544 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
545 | ||
557ce264 AA |
546 | static void |
547 | free_session_slots(struct nfsd4_session *ses) | |
548 | { | |
549 | int i; | |
550 | ||
551 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
552 | kfree(ses->se_slots[i]); | |
553 | } | |
554 | ||
a649637c | 555 | /* |
efe0cb6d BF |
556 | * We don't actually need to cache the rpc and session headers, so we |
557 | * can allocate a little less for each slot: | |
558 | */ | |
559 | static inline int slot_bytes(struct nfsd4_channel_attrs *ca) | |
560 | { | |
561 | return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
562 | } | |
563 | ||
5b6feee9 | 564 | static int nfsd4_sanitize_slot_size(u32 size) |
ec6b5d7b | 565 | { |
5b6feee9 BF |
566 | size -= NFSD_MIN_HDR_SEQ_SZ; /* We don't cache the rpc header */ |
567 | size = min_t(u32, size, NFSD_SLOT_CACHE_SIZE); | |
ec6b5d7b | 568 | |
5b6feee9 BF |
569 | return size; |
570 | } | |
ec6b5d7b | 571 | |
5b6feee9 BF |
572 | /* |
573 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c AA |
574 | * re-negotiate active sessions and reduce their slot usage to make |
575 | * rooom for new connections. For now we just fail the create session. | |
ec6b5d7b | 576 | */ |
5b6feee9 | 577 | static int nfsd4_get_drc_mem(int slotsize, u32 num) |
ec6b5d7b | 578 | { |
5b6feee9 | 579 | int avail; |
ec6b5d7b | 580 | |
5b6feee9 | 581 | num = min_t(u32, num, NFSD_MAX_SLOTS_PER_SESSION); |
5d77ddfb | 582 | |
5b6feee9 BF |
583 | spin_lock(&nfsd_drc_lock); |
584 | avail = min_t(int, NFSD_MAX_MEM_PER_SESSION, | |
585 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
586 | num = min_t(int, num, avail / slotsize); | |
587 | nfsd_drc_mem_used += num * slotsize; | |
588 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 589 | |
5b6feee9 BF |
590 | return num; |
591 | } | |
ec6b5d7b | 592 | |
5b6feee9 BF |
593 | static void nfsd4_put_drc_mem(int slotsize, int num) |
594 | { | |
4bd9b0f4 | 595 | spin_lock(&nfsd_drc_lock); |
5b6feee9 | 596 | nfsd_drc_mem_used -= slotsize * num; |
4bd9b0f4 | 597 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 598 | } |
ec6b5d7b | 599 | |
5b6feee9 BF |
600 | static struct nfsd4_session *alloc_session(int slotsize, int numslots) |
601 | { | |
602 | struct nfsd4_session *new; | |
603 | int mem, i; | |
a649637c | 604 | |
5b6feee9 BF |
605 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
606 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
607 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 608 | |
5b6feee9 BF |
609 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
610 | if (!new) | |
611 | return NULL; | |
557ce264 | 612 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 BF |
613 | for (i = 0; i < numslots; i++) { |
614 | mem = sizeof(struct nfsd4_slot) + slotsize; | |
615 | new->se_slots[i] = kzalloc(mem, GFP_KERNEL); | |
616 | if (!new->se_slots[i]) | |
557ce264 | 617 | goto out_free; |
557ce264 | 618 | } |
5b6feee9 BF |
619 | return new; |
620 | out_free: | |
621 | while (i--) | |
622 | kfree(new->se_slots[i]); | |
623 | kfree(new); | |
624 | return NULL; | |
ec6b5d7b AA |
625 | } |
626 | ||
5b6feee9 | 627 | static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, struct nfsd4_channel_attrs *req, int numslots, int slotsize) |
ec6b5d7b | 628 | { |
5b6feee9 | 629 | u32 maxrpc = nfsd_serv->sv_max_mesg; |
ec6b5d7b | 630 | |
5b6feee9 | 631 | new->maxreqs = numslots; |
d2b21743 MJ |
632 | new->maxresp_cached = min_t(u32, req->maxresp_cached, |
633 | slotsize + NFSD_MIN_HDR_SEQ_SZ); | |
5b6feee9 BF |
634 | new->maxreq_sz = min_t(u32, req->maxreq_sz, maxrpc); |
635 | new->maxresp_sz = min_t(u32, req->maxresp_sz, maxrpc); | |
636 | new->maxops = min_t(u32, req->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
637 | } | |
ec6b5d7b | 638 | |
19cf5c02 BF |
639 | static void free_conn(struct nfsd4_conn *c) |
640 | { | |
641 | svc_xprt_put(c->cn_xprt); | |
642 | kfree(c); | |
643 | } | |
ec6b5d7b | 644 | |
19cf5c02 BF |
645 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
646 | { | |
647 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
648 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 649 | |
19cf5c02 BF |
650 | spin_lock(&clp->cl_lock); |
651 | if (!list_empty(&c->cn_persession)) { | |
652 | list_del(&c->cn_persession); | |
653 | free_conn(c); | |
654 | } | |
655 | spin_unlock(&clp->cl_lock); | |
eea49806 | 656 | nfsd4_probe_callback(clp); |
19cf5c02 | 657 | } |
ec6b5d7b | 658 | |
d29c374c | 659 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 660 | { |
c7662518 | 661 | struct nfsd4_conn *conn; |
ec6b5d7b | 662 | |
c7662518 BF |
663 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
664 | if (!conn) | |
db90681d | 665 | return NULL; |
c7662518 BF |
666 | svc_xprt_get(rqstp->rq_xprt); |
667 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 668 | conn->cn_flags = flags; |
db90681d BF |
669 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
670 | return conn; | |
671 | } | |
a649637c | 672 | |
328ead28 BF |
673 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
674 | { | |
675 | conn->cn_session = ses; | |
676 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
677 | } |
678 | ||
db90681d | 679 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 680 | { |
db90681d | 681 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 682 | |
c7662518 | 683 | spin_lock(&clp->cl_lock); |
328ead28 | 684 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 685 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
686 | } |
687 | ||
21b75b01 | 688 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 689 | { |
19cf5c02 | 690 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 691 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
692 | } |
693 | ||
1d1bc8f2 | 694 | static __be32 nfsd4_new_conn(struct svc_rqst *rqstp, struct nfsd4_session *ses, u32 dir) |
ec6b5d7b | 695 | { |
db90681d | 696 | struct nfsd4_conn *conn; |
21b75b01 | 697 | int ret; |
ec6b5d7b | 698 | |
1d1bc8f2 | 699 | conn = alloc_conn(rqstp, dir); |
db90681d BF |
700 | if (!conn) |
701 | return nfserr_jukebox; | |
702 | nfsd4_hash_conn(conn, ses); | |
21b75b01 BF |
703 | ret = nfsd4_register_conn(conn); |
704 | if (ret) | |
705 | /* oops; xprt is already down: */ | |
706 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
c7662518 BF |
707 | return nfs_ok; |
708 | } | |
ec6b5d7b | 709 | |
1d1bc8f2 BF |
710 | static __be32 nfsd4_new_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_session *ses) |
711 | { | |
712 | u32 dir = NFS4_CDFC4_FORE; | |
713 | ||
714 | if (ses->se_flags & SESSION4_BACK_CHAN) | |
715 | dir |= NFS4_CDFC4_BACK; | |
716 | ||
717 | return nfsd4_new_conn(rqstp, ses, dir); | |
718 | } | |
719 | ||
720 | /* must be called under client_lock */ | |
19cf5c02 | 721 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 722 | { |
19cf5c02 BF |
723 | struct nfs4_client *clp = s->se_client; |
724 | struct nfsd4_conn *c; | |
ec6b5d7b | 725 | |
19cf5c02 BF |
726 | spin_lock(&clp->cl_lock); |
727 | while (!list_empty(&s->se_conns)) { | |
728 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
729 | list_del_init(&c->cn_persession); | |
730 | spin_unlock(&clp->cl_lock); | |
557ce264 | 731 | |
19cf5c02 BF |
732 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
733 | free_conn(c); | |
ec6b5d7b | 734 | |
19cf5c02 BF |
735 | spin_lock(&clp->cl_lock); |
736 | } | |
737 | spin_unlock(&clp->cl_lock); | |
c7662518 | 738 | } |
ec6b5d7b | 739 | |
c7662518 BF |
740 | void free_session(struct kref *kref) |
741 | { | |
742 | struct nfsd4_session *ses; | |
743 | int mem; | |
744 | ||
745 | ses = container_of(kref, struct nfsd4_session, se_ref); | |
19cf5c02 | 746 | nfsd4_del_conns(ses); |
c7662518 BF |
747 | spin_lock(&nfsd_drc_lock); |
748 | mem = ses->se_fchannel.maxreqs * slot_bytes(&ses->se_fchannel); | |
749 | nfsd_drc_mem_used -= mem; | |
750 | spin_unlock(&nfsd_drc_lock); | |
751 | free_session_slots(ses); | |
752 | kfree(ses); | |
753 | } | |
754 | ||
ac7c46f2 | 755 | static struct nfsd4_session *alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
5b6feee9 BF |
756 | { |
757 | struct nfsd4_session *new; | |
758 | struct nfsd4_channel_attrs *fchan = &cses->fore_channel; | |
759 | int numslots, slotsize; | |
c7662518 | 760 | int status; |
5b6feee9 BF |
761 | int idx; |
762 | ||
763 | /* | |
764 | * Note decreasing slot size below client's request may | |
765 | * make it difficult for client to function correctly, whereas | |
766 | * decreasing the number of slots will (just?) affect | |
767 | * performance. When short on memory we therefore prefer to | |
768 | * decrease number of slots instead of their size. | |
769 | */ | |
770 | slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached); | |
771 | numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs); | |
ced6dfe9 MJ |
772 | if (numslots < 1) |
773 | return NULL; | |
5b6feee9 BF |
774 | |
775 | new = alloc_session(slotsize, numslots); | |
776 | if (!new) { | |
777 | nfsd4_put_drc_mem(slotsize, fchan->maxreqs); | |
ac7c46f2 | 778 | return NULL; |
557ce264 | 779 | } |
5b6feee9 | 780 | init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize); |
557ce264 | 781 | |
ec6b5d7b AA |
782 | new->se_client = clp; |
783 | gen_sessionid(new); | |
ec6b5d7b | 784 | |
c7662518 BF |
785 | INIT_LIST_HEAD(&new->se_conns); |
786 | ||
ac7c46f2 | 787 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 788 | new->se_flags = cses->flags; |
8b5ce5cd | 789 | new->se_cb_prog = cses->callback_prog; |
ec6b5d7b | 790 | kref_init(&new->se_ref); |
5b6feee9 | 791 | idx = hash_sessionid(&new->se_sessionid); |
9089f1b4 | 792 | spin_lock(&client_lock); |
ec6b5d7b | 793 | list_add(&new->se_hash, &sessionid_hashtbl[idx]); |
4c649378 | 794 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 795 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 796 | spin_unlock(&clp->cl_lock); |
9089f1b4 | 797 | spin_unlock(&client_lock); |
ec6b5d7b | 798 | |
1d1bc8f2 | 799 | status = nfsd4_new_conn_from_crses(rqstp, new); |
ac7c46f2 | 800 | /* whoops: benny points out, status is ignored! (err, or bogus) */ |
c7662518 BF |
801 | if (status) { |
802 | free_session(&new->se_ref); | |
ac7c46f2 | 803 | return NULL; |
c7662518 | 804 | } |
dcbeaa68 | 805 | if (cses->flags & SESSION4_BACK_CHAN) { |
edd76786 | 806 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
807 | /* |
808 | * This is a little silly; with sessions there's no real | |
809 | * use for the callback address. Use the peer address | |
810 | * as a reasonable default for now, but consider fixing | |
811 | * the rpc client not to require an address in the | |
812 | * future: | |
813 | */ | |
edd76786 BF |
814 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
815 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 816 | } |
dcbeaa68 | 817 | nfsd4_probe_callback(clp); |
ac7c46f2 | 818 | return new; |
ec6b5d7b AA |
819 | } |
820 | ||
9089f1b4 | 821 | /* caller must hold client_lock */ |
5282fd72 ME |
822 | static struct nfsd4_session * |
823 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) | |
824 | { | |
825 | struct nfsd4_session *elem; | |
826 | int idx; | |
827 | ||
828 | dump_sessionid(__func__, sessionid); | |
829 | idx = hash_sessionid(sessionid); | |
5282fd72 ME |
830 | /* Search in the appropriate list */ |
831 | list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { | |
5282fd72 ME |
832 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
833 | NFS4_MAX_SESSIONID_LEN)) { | |
834 | return elem; | |
835 | } | |
836 | } | |
837 | ||
838 | dprintk("%s: session not found\n", __func__); | |
839 | return NULL; | |
840 | } | |
841 | ||
9089f1b4 | 842 | /* caller must hold client_lock */ |
7116ed6b | 843 | static void |
5282fd72 | 844 | unhash_session(struct nfsd4_session *ses) |
7116ed6b AA |
845 | { |
846 | list_del(&ses->se_hash); | |
4c649378 | 847 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 848 | list_del(&ses->se_perclnt); |
4c649378 | 849 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
850 | } |
851 | ||
36acb66b | 852 | /* must be called under the client_lock */ |
1da177e4 | 853 | static inline void |
36acb66b | 854 | renew_client_locked(struct nfs4_client *clp) |
1da177e4 | 855 | { |
07cd4909 BH |
856 | if (is_client_expired(clp)) { |
857 | dprintk("%s: client (clientid %08x/%08x) already expired\n", | |
858 | __func__, | |
859 | clp->cl_clientid.cl_boot, | |
860 | clp->cl_clientid.cl_id); | |
861 | return; | |
862 | } | |
863 | ||
1da177e4 LT |
864 | /* |
865 | * Move client to the end to the LRU list. | |
866 | */ | |
867 | dprintk("renewing client (clientid %08x/%08x)\n", | |
868 | clp->cl_clientid.cl_boot, | |
869 | clp->cl_clientid.cl_id); | |
870 | list_move_tail(&clp->cl_lru, &client_lru); | |
871 | clp->cl_time = get_seconds(); | |
872 | } | |
873 | ||
36acb66b BH |
874 | static inline void |
875 | renew_client(struct nfs4_client *clp) | |
876 | { | |
877 | spin_lock(&client_lock); | |
878 | renew_client_locked(clp); | |
879 | spin_unlock(&client_lock); | |
880 | } | |
881 | ||
1da177e4 LT |
882 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
883 | static int | |
884 | STALE_CLIENTID(clientid_t *clid) | |
885 | { | |
886 | if (clid->cl_boot == boot_time) | |
887 | return 0; | |
60adfc50 AA |
888 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
889 | clid->cl_boot, clid->cl_id, boot_time); | |
1da177e4 LT |
890 | return 1; |
891 | } | |
892 | ||
893 | /* | |
894 | * XXX Should we use a slab cache ? | |
895 | * This type of memory management is somewhat inefficient, but we use it | |
896 | * anyway since SETCLIENTID is not a common operation. | |
897 | */ | |
35bba9a3 | 898 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
899 | { |
900 | struct nfs4_client *clp; | |
901 | ||
35bba9a3 BF |
902 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
903 | if (clp == NULL) | |
904 | return NULL; | |
905 | clp->cl_name.data = kmalloc(name.len, GFP_KERNEL); | |
906 | if (clp->cl_name.data == NULL) { | |
907 | kfree(clp); | |
908 | return NULL; | |
1da177e4 | 909 | } |
35bba9a3 BF |
910 | memcpy(clp->cl_name.data, name.data, name.len); |
911 | clp->cl_name.len = name.len; | |
1da177e4 LT |
912 | return clp; |
913 | } | |
914 | ||
915 | static inline void | |
916 | free_client(struct nfs4_client *clp) | |
917 | { | |
792c95dd BF |
918 | while (!list_empty(&clp->cl_sessions)) { |
919 | struct nfsd4_session *ses; | |
920 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
921 | se_perclnt); | |
922 | list_del(&ses->se_perclnt); | |
923 | nfsd4_put_session(ses); | |
924 | } | |
1da177e4 LT |
925 | if (clp->cl_cred.cr_group_info) |
926 | put_group_info(clp->cl_cred.cr_group_info); | |
68e76ad0 | 927 | kfree(clp->cl_principal); |
1da177e4 LT |
928 | kfree(clp->cl_name.data); |
929 | kfree(clp); | |
930 | } | |
931 | ||
d7682988 BH |
932 | void |
933 | release_session_client(struct nfsd4_session *session) | |
934 | { | |
935 | struct nfs4_client *clp = session->se_client; | |
936 | ||
937 | if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock)) | |
938 | return; | |
939 | if (is_client_expired(clp)) { | |
940 | free_client(clp); | |
941 | session->se_client = NULL; | |
942 | } else | |
943 | renew_client_locked(clp); | |
944 | spin_unlock(&client_lock); | |
d7682988 BH |
945 | } |
946 | ||
84d38ac9 BH |
947 | /* must be called under the client_lock */ |
948 | static inline void | |
949 | unhash_client_locked(struct nfs4_client *clp) | |
950 | { | |
792c95dd BF |
951 | struct nfsd4_session *ses; |
952 | ||
07cd4909 | 953 | mark_client_expired(clp); |
84d38ac9 | 954 | list_del(&clp->cl_lru); |
4c649378 | 955 | spin_lock(&clp->cl_lock); |
792c95dd BF |
956 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
957 | list_del_init(&ses->se_hash); | |
4c649378 | 958 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
959 | } |
960 | ||
1da177e4 LT |
961 | static void |
962 | expire_client(struct nfs4_client *clp) | |
963 | { | |
964 | struct nfs4_stateowner *sop; | |
965 | struct nfs4_delegation *dp; | |
1da177e4 LT |
966 | struct list_head reaplist; |
967 | ||
1da177e4 LT |
968 | INIT_LIST_HEAD(&reaplist); |
969 | spin_lock(&recall_lock); | |
ea1da636 N |
970 | while (!list_empty(&clp->cl_delegations)) { |
971 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
ea1da636 | 972 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
973 | list_move(&dp->dl_recall_lru, &reaplist); |
974 | } | |
975 | spin_unlock(&recall_lock); | |
976 | while (!list_empty(&reaplist)) { | |
977 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
978 | list_del_init(&dp->dl_recall_lru); | |
979 | unhash_delegation(dp); | |
980 | } | |
ea1da636 N |
981 | while (!list_empty(&clp->cl_openowners)) { |
982 | sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient); | |
f044ff83 | 983 | release_openowner(sop); |
1da177e4 | 984 | } |
6ff8da08 | 985 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
986 | if (clp->cl_cb_conn.cb_xprt) |
987 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
36acb66b BH |
988 | list_del(&clp->cl_idhash); |
989 | list_del(&clp->cl_strhash); | |
be1fdf6c | 990 | spin_lock(&client_lock); |
84d38ac9 | 991 | unhash_client_locked(clp); |
46583e25 BH |
992 | if (atomic_read(&clp->cl_refcount) == 0) |
993 | free_client(clp); | |
be1fdf6c | 994 | spin_unlock(&client_lock); |
1da177e4 LT |
995 | } |
996 | ||
35bba9a3 BF |
997 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
998 | { | |
999 | memcpy(target->cl_verifier.data, source->data, | |
1000 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
1001 | } |
1002 | ||
35bba9a3 BF |
1003 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
1004 | { | |
1da177e4 LT |
1005 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
1006 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
1007 | } | |
1008 | ||
35bba9a3 BF |
1009 | static void copy_cred(struct svc_cred *target, struct svc_cred *source) |
1010 | { | |
1da177e4 LT |
1011 | target->cr_uid = source->cr_uid; |
1012 | target->cr_gid = source->cr_gid; | |
1013 | target->cr_group_info = source->cr_group_info; | |
1014 | get_group_info(target->cr_group_info); | |
1015 | } | |
1016 | ||
35bba9a3 | 1017 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 1018 | { |
a55370a3 | 1019 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
1020 | } |
1021 | ||
1022 | static int | |
599e0a22 BF |
1023 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1024 | { | |
1025 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
1026 | } |
1027 | ||
1028 | static int | |
599e0a22 BF |
1029 | same_clid(clientid_t *cl1, clientid_t *cl2) |
1030 | { | |
1031 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1032 | } |
1033 | ||
1034 | /* XXX what about NGROUP */ | |
1035 | static int | |
599e0a22 BF |
1036 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
1037 | { | |
1038 | return cr1->cr_uid == cr2->cr_uid; | |
1da177e4 LT |
1039 | } |
1040 | ||
5ec7b46c BF |
1041 | static void gen_clid(struct nfs4_client *clp) |
1042 | { | |
1043 | static u32 current_clientid = 1; | |
1044 | ||
1da177e4 LT |
1045 | clp->cl_clientid.cl_boot = boot_time; |
1046 | clp->cl_clientid.cl_id = current_clientid++; | |
1047 | } | |
1048 | ||
deda2faa BF |
1049 | static void gen_confirm(struct nfs4_client *clp) |
1050 | { | |
1051 | static u32 i; | |
1052 | u32 *p; | |
1da177e4 | 1053 | |
1da177e4 | 1054 | p = (u32 *)clp->cl_confirm.data; |
deda2faa BF |
1055 | *p++ = get_seconds(); |
1056 | *p++ = i++; | |
1da177e4 LT |
1057 | } |
1058 | ||
b09333c4 RL |
1059 | static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, |
1060 | struct svc_rqst *rqstp, nfs4_verifier *verf) | |
1061 | { | |
1062 | struct nfs4_client *clp; | |
1063 | struct sockaddr *sa = svc_addr(rqstp); | |
1064 | char *princ; | |
1065 | ||
1066 | clp = alloc_client(name); | |
1067 | if (clp == NULL) | |
1068 | return NULL; | |
1069 | ||
792c95dd BF |
1070 | INIT_LIST_HEAD(&clp->cl_sessions); |
1071 | ||
b09333c4 RL |
1072 | princ = svc_gss_principal(rqstp); |
1073 | if (princ) { | |
1074 | clp->cl_principal = kstrdup(princ, GFP_KERNEL); | |
1075 | if (clp->cl_principal == NULL) { | |
1076 | free_client(clp); | |
1077 | return NULL; | |
1078 | } | |
1079 | } | |
1080 | ||
1081 | memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); | |
46583e25 | 1082 | atomic_set(&clp->cl_refcount, 0); |
77a3569d | 1083 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; |
b09333c4 RL |
1084 | INIT_LIST_HEAD(&clp->cl_idhash); |
1085 | INIT_LIST_HEAD(&clp->cl_strhash); | |
1086 | INIT_LIST_HEAD(&clp->cl_openowners); | |
1087 | INIT_LIST_HEAD(&clp->cl_delegations); | |
b09333c4 | 1088 | INIT_LIST_HEAD(&clp->cl_lru); |
5ce8ba25 | 1089 | INIT_LIST_HEAD(&clp->cl_callbacks); |
6ff8da08 | 1090 | spin_lock_init(&clp->cl_lock); |
cee277d9 | 1091 | INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_do_callback_rpc); |
07cd4909 | 1092 | clp->cl_time = get_seconds(); |
b09333c4 RL |
1093 | clear_bit(0, &clp->cl_cb_slot_busy); |
1094 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1095 | copy_verf(clp, verf); | |
1096 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
1097 | clp->cl_flavor = rqstp->rq_flavor; | |
1098 | copy_cred(&clp->cl_cred, &rqstp->rq_cred); | |
1099 | gen_confirm(clp); | |
edd76786 | 1100 | clp->cl_cb_session = NULL; |
b09333c4 RL |
1101 | return clp; |
1102 | } | |
1103 | ||
35bba9a3 BF |
1104 | static int check_name(struct xdr_netobj name) |
1105 | { | |
1da177e4 LT |
1106 | if (name.len == 0) |
1107 | return 0; | |
1108 | if (name.len > NFS4_OPAQUE_LIMIT) { | |
2fdada03 | 1109 | dprintk("NFSD: check_name: name too long(%d)!\n", name.len); |
1da177e4 LT |
1110 | return 0; |
1111 | } | |
1112 | return 1; | |
1113 | } | |
1114 | ||
fd39ca9a | 1115 | static void |
1da177e4 LT |
1116 | add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) |
1117 | { | |
1118 | unsigned int idhashval; | |
1119 | ||
1120 | list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); | |
1121 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
1122 | list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); | |
36acb66b | 1123 | renew_client(clp); |
1da177e4 LT |
1124 | } |
1125 | ||
fd39ca9a | 1126 | static void |
1da177e4 LT |
1127 | move_to_confirmed(struct nfs4_client *clp) |
1128 | { | |
1129 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
1130 | unsigned int strhashval; | |
1131 | ||
1132 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
f116629d | 1133 | list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); |
a55370a3 | 1134 | strhashval = clientstr_hashval(clp->cl_recdir); |
328efbab | 1135 | list_move(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); |
1da177e4 LT |
1136 | renew_client(clp); |
1137 | } | |
1138 | ||
1139 | static struct nfs4_client * | |
1140 | find_confirmed_client(clientid_t *clid) | |
1141 | { | |
1142 | struct nfs4_client *clp; | |
1143 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1144 | ||
1145 | list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 1146 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
1147 | return clp; |
1148 | } | |
1149 | return NULL; | |
1150 | } | |
1151 | ||
1152 | static struct nfs4_client * | |
1153 | find_unconfirmed_client(clientid_t *clid) | |
1154 | { | |
1155 | struct nfs4_client *clp; | |
1156 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1157 | ||
1158 | list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 1159 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
1160 | return clp; |
1161 | } | |
1162 | return NULL; | |
1163 | } | |
1164 | ||
6e5f15c9 | 1165 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 1166 | { |
6e5f15c9 | 1167 | return clp->cl_exchange_flags != 0; |
e203d506 | 1168 | } |
a1bcecd2 | 1169 | |
28ce6054 | 1170 | static struct nfs4_client * |
e203d506 | 1171 | find_confirmed_client_by_str(const char *dname, unsigned int hashval) |
28ce6054 N |
1172 | { |
1173 | struct nfs4_client *clp; | |
1174 | ||
1175 | list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { | |
e203d506 | 1176 | if (same_name(clp->cl_recdir, dname)) |
28ce6054 N |
1177 | return clp; |
1178 | } | |
1179 | return NULL; | |
1180 | } | |
1181 | ||
1182 | static struct nfs4_client * | |
e203d506 | 1183 | find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) |
28ce6054 N |
1184 | { |
1185 | struct nfs4_client *clp; | |
1186 | ||
1187 | list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { | |
e203d506 | 1188 | if (same_name(clp->cl_recdir, dname)) |
28ce6054 N |
1189 | return clp; |
1190 | } | |
1191 | return NULL; | |
1192 | } | |
1193 | ||
6f3d772f TU |
1194 | static void rpc_svcaddr2sockaddr(struct sockaddr *sa, unsigned short family, union svc_addr_u *svcaddr) |
1195 | { | |
1196 | switch (family) { | |
1197 | case AF_INET: | |
1198 | ((struct sockaddr_in *)sa)->sin_family = AF_INET; | |
1199 | ((struct sockaddr_in *)sa)->sin_addr = svcaddr->addr; | |
1200 | return; | |
1201 | case AF_INET6: | |
1202 | ((struct sockaddr_in6 *)sa)->sin6_family = AF_INET6; | |
1203 | ((struct sockaddr_in6 *)sa)->sin6_addr = svcaddr->addr6; | |
1204 | return; | |
1205 | } | |
1206 | } | |
1207 | ||
fd39ca9a | 1208 | static void |
6f3d772f | 1209 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 1210 | { |
07263f1e | 1211 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
1212 | struct sockaddr *sa = svc_addr(rqstp); |
1213 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
1214 | unsigned short expected_family; |
1215 | ||
1216 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
1217 | if (se->se_callback_netid_len == 3 && | |
1218 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
1219 | expected_family = AF_INET; | |
1220 | else if (se->se_callback_netid_len == 4 && | |
1221 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
1222 | expected_family = AF_INET6; | |
1223 | else | |
1da177e4 LT |
1224 | goto out_err; |
1225 | ||
07263f1e | 1226 | conn->cb_addrlen = rpc_uaddr2sockaddr(se->se_callback_addr_val, |
aa9a4ec7 | 1227 | se->se_callback_addr_len, |
07263f1e BF |
1228 | (struct sockaddr *)&conn->cb_addr, |
1229 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 1230 | |
07263f1e | 1231 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 1232 | goto out_err; |
aa9a4ec7 | 1233 | |
07263f1e BF |
1234 | if (conn->cb_addr.ss_family == AF_INET6) |
1235 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 1236 | |
07263f1e BF |
1237 | conn->cb_prog = se->se_callback_prog; |
1238 | conn->cb_ident = se->se_callback_ident; | |
6f3d772f | 1239 | rpc_svcaddr2sockaddr((struct sockaddr *)&conn->cb_saddr, expected_family, &rqstp->rq_daddr); |
1da177e4 LT |
1240 | return; |
1241 | out_err: | |
07263f1e BF |
1242 | conn->cb_addr.ss_family = AF_UNSPEC; |
1243 | conn->cb_addrlen = 0; | |
849823c5 | 1244 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
1245 | "will not receive delegations\n", |
1246 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
1247 | ||
1da177e4 LT |
1248 | return; |
1249 | } | |
1250 | ||
074fe897 | 1251 | /* |
557ce264 | 1252 | * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. |
074fe897 | 1253 | */ |
074fe897 AA |
1254 | void |
1255 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) | |
074fe897 | 1256 | { |
557ce264 AA |
1257 | struct nfsd4_slot *slot = resp->cstate.slot; |
1258 | unsigned int base; | |
074fe897 | 1259 | |
557ce264 | 1260 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1261 | |
557ce264 AA |
1262 | slot->sl_opcnt = resp->opcnt; |
1263 | slot->sl_status = resp->cstate.status; | |
074fe897 | 1264 | |
bf864a31 | 1265 | if (nfsd4_not_cached(resp)) { |
557ce264 | 1266 | slot->sl_datalen = 0; |
bf864a31 | 1267 | return; |
074fe897 | 1268 | } |
557ce264 AA |
1269 | slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; |
1270 | base = (char *)resp->cstate.datap - | |
1271 | (char *)resp->xbuf->head[0].iov_base; | |
1272 | if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, | |
1273 | slot->sl_datalen)) | |
1274 | WARN("%s: sessions DRC could not cache compound\n", __func__); | |
1275 | return; | |
074fe897 AA |
1276 | } |
1277 | ||
1278 | /* | |
abfabf8c AA |
1279 | * Encode the replay sequence operation from the slot values. |
1280 | * If cachethis is FALSE encode the uncached rep error on the next | |
1281 | * operation which sets resp->p and increments resp->opcnt for | |
1282 | * nfs4svc_encode_compoundres. | |
074fe897 | 1283 | * |
074fe897 | 1284 | */ |
abfabf8c AA |
1285 | static __be32 |
1286 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
1287 | struct nfsd4_compoundres *resp) | |
074fe897 | 1288 | { |
abfabf8c AA |
1289 | struct nfsd4_op *op; |
1290 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 1291 | |
abfabf8c | 1292 | dprintk("--> %s resp->opcnt %d cachethis %u \n", __func__, |
557ce264 | 1293 | resp->opcnt, resp->cstate.slot->sl_cachethis); |
bf864a31 | 1294 | |
abfabf8c AA |
1295 | /* Encode the replayed sequence operation */ |
1296 | op = &args->ops[resp->opcnt - 1]; | |
1297 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 1298 | |
abfabf8c | 1299 | /* Return nfserr_retry_uncached_rep in next operation. */ |
557ce264 | 1300 | if (args->opcnt > 1 && slot->sl_cachethis == 0) { |
abfabf8c AA |
1301 | op = &args->ops[resp->opcnt++]; |
1302 | op->status = nfserr_retry_uncached_rep; | |
1303 | nfsd4_encode_operation(resp, op); | |
074fe897 | 1304 | } |
abfabf8c | 1305 | return op->status; |
074fe897 AA |
1306 | } |
1307 | ||
1308 | /* | |
557ce264 AA |
1309 | * The sequence operation is not cached because we can use the slot and |
1310 | * session values. | |
074fe897 AA |
1311 | */ |
1312 | __be32 | |
bf864a31 AA |
1313 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
1314 | struct nfsd4_sequence *seq) | |
074fe897 | 1315 | { |
557ce264 | 1316 | struct nfsd4_slot *slot = resp->cstate.slot; |
074fe897 AA |
1317 | __be32 status; |
1318 | ||
557ce264 | 1319 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1320 | |
abfabf8c AA |
1321 | /* Either returns 0 or nfserr_retry_uncached */ |
1322 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); | |
1323 | if (status == nfserr_retry_uncached_rep) | |
1324 | return status; | |
074fe897 | 1325 | |
557ce264 AA |
1326 | /* The sequence operation has been encoded, cstate->datap set. */ |
1327 | memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); | |
074fe897 | 1328 | |
557ce264 AA |
1329 | resp->opcnt = slot->sl_opcnt; |
1330 | resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); | |
1331 | status = slot->sl_status; | |
074fe897 AA |
1332 | |
1333 | return status; | |
1334 | } | |
1335 | ||
0733d213 AA |
1336 | /* |
1337 | * Set the exchange_id flags returned by the server. | |
1338 | */ | |
1339 | static void | |
1340 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
1341 | { | |
1342 | /* pNFS is not supported */ | |
1343 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
1344 | ||
1345 | /* Referrals are supported, Migration is not. */ | |
1346 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
1347 | ||
1348 | /* set the wire flags to return to client. */ | |
1349 | clid->flags = new->cl_exchange_flags; | |
1350 | } | |
1351 | ||
069b6ad4 AA |
1352 | __be32 |
1353 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
1354 | struct nfsd4_compound_state *cstate, | |
1355 | struct nfsd4_exchange_id *exid) | |
1356 | { | |
0733d213 AA |
1357 | struct nfs4_client *unconf, *conf, *new; |
1358 | int status; | |
1359 | unsigned int strhashval; | |
1360 | char dname[HEXDIR_LEN]; | |
363168b4 | 1361 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 1362 | nfs4_verifier verf = exid->verifier; |
363168b4 | 1363 | struct sockaddr *sa = svc_addr(rqstp); |
0733d213 | 1364 | |
363168b4 | 1365 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 1366 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 1367 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 1368 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 1369 | addr_str, exid->flags, exid->spa_how); |
0733d213 AA |
1370 | |
1371 | if (!check_name(exid->clname) || (exid->flags & ~EXCHGID4_FLAG_MASK_A)) | |
1372 | return nfserr_inval; | |
1373 | ||
1374 | /* Currently only support SP4_NONE */ | |
1375 | switch (exid->spa_how) { | |
1376 | case SP4_NONE: | |
1377 | break; | |
1378 | case SP4_SSV: | |
044bc1d4 | 1379 | return nfserr_serverfault; |
0733d213 AA |
1380 | default: |
1381 | BUG(); /* checked by xdr code */ | |
1382 | case SP4_MACH_CRED: | |
1383 | return nfserr_serverfault; /* no excuse :-/ */ | |
1384 | } | |
1385 | ||
1386 | status = nfs4_make_rec_clidname(dname, &exid->clname); | |
1387 | ||
1388 | if (status) | |
1389 | goto error; | |
1390 | ||
1391 | strhashval = clientstr_hashval(dname); | |
1392 | ||
1393 | nfs4_lock_state(); | |
1394 | status = nfs_ok; | |
1395 | ||
e203d506 | 1396 | conf = find_confirmed_client_by_str(dname, strhashval); |
0733d213 | 1397 | if (conf) { |
e203d506 BF |
1398 | if (!clp_used_exchangeid(conf)) { |
1399 | status = nfserr_clid_inuse; /* XXX: ? */ | |
1400 | goto out; | |
1401 | } | |
0733d213 AA |
1402 | if (!same_verf(&verf, &conf->cl_verifier)) { |
1403 | /* 18.35.4 case 8 */ | |
1404 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1405 | status = nfserr_not_same; | |
1406 | goto out; | |
1407 | } | |
1408 | /* Client reboot: destroy old state */ | |
1409 | expire_client(conf); | |
1410 | goto out_new; | |
1411 | } | |
1412 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { | |
1413 | /* 18.35.4 case 9 */ | |
1414 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1415 | status = nfserr_perm; | |
1416 | goto out; | |
1417 | } | |
1418 | expire_client(conf); | |
1419 | goto out_new; | |
1420 | } | |
0733d213 AA |
1421 | /* |
1422 | * Set bit when the owner id and verifier map to an already | |
1423 | * confirmed client id (18.35.3). | |
1424 | */ | |
1425 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
1426 | ||
1427 | /* | |
1428 | * Falling into 18.35.4 case 2, possible router replay. | |
1429 | * Leave confirmed record intact and return same result. | |
1430 | */ | |
1431 | copy_verf(conf, &verf); | |
1432 | new = conf; | |
1433 | goto out_copy; | |
6ddbbbfe MS |
1434 | } |
1435 | ||
1436 | /* 18.35.4 case 7 */ | |
1437 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1438 | status = nfserr_noent; | |
1439 | goto out; | |
0733d213 AA |
1440 | } |
1441 | ||
e203d506 | 1442 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
0733d213 AA |
1443 | if (unconf) { |
1444 | /* | |
1445 | * Possible retry or client restart. Per 18.35.4 case 4, | |
1446 | * a new unconfirmed record should be generated regardless | |
1447 | * of whether any properties have changed. | |
1448 | */ | |
1449 | expire_client(unconf); | |
1450 | } | |
1451 | ||
1452 | out_new: | |
1453 | /* Normal case */ | |
b09333c4 | 1454 | new = create_client(exid->clname, dname, rqstp, &verf); |
0733d213 | 1455 | if (new == NULL) { |
4731030d | 1456 | status = nfserr_jukebox; |
0733d213 AA |
1457 | goto out; |
1458 | } | |
1459 | ||
0733d213 | 1460 | gen_clid(new); |
0733d213 AA |
1461 | add_to_unconfirmed(new, strhashval); |
1462 | out_copy: | |
1463 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
1464 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
1465 | ||
38eb76a5 | 1466 | exid->seqid = 1; |
0733d213 AA |
1467 | nfsd4_set_ex_flags(new, exid); |
1468 | ||
1469 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
49557cc7 | 1470 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
1471 | status = nfs_ok; |
1472 | ||
1473 | out: | |
1474 | nfs4_unlock_state(); | |
1475 | error: | |
1476 | dprintk("nfsd4_exchange_id returns %d\n", ntohl(status)); | |
1477 | return status; | |
069b6ad4 AA |
1478 | } |
1479 | ||
b85d4c01 | 1480 | static int |
88e588d5 | 1481 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 1482 | { |
88e588d5 AA |
1483 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
1484 | slot_seqid); | |
b85d4c01 BH |
1485 | |
1486 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
1487 | if (slot_inuse) { |
1488 | if (seqid == slot_seqid) | |
b85d4c01 BH |
1489 | return nfserr_jukebox; |
1490 | else | |
1491 | return nfserr_seq_misordered; | |
1492 | } | |
1493 | /* Normal */ | |
88e588d5 | 1494 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 BH |
1495 | return nfs_ok; |
1496 | /* Replay */ | |
88e588d5 | 1497 | if (seqid == slot_seqid) |
b85d4c01 BH |
1498 | return nfserr_replay_cache; |
1499 | /* Wraparound */ | |
88e588d5 | 1500 | if (seqid == 1 && (slot_seqid + 1) == 0) |
b85d4c01 BH |
1501 | return nfs_ok; |
1502 | /* Misordered replay or misordered new request */ | |
1503 | return nfserr_seq_misordered; | |
1504 | } | |
1505 | ||
49557cc7 AA |
1506 | /* |
1507 | * Cache the create session result into the create session single DRC | |
1508 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
1509 | * Do this for solo or embedded create session operations. | |
1510 | */ | |
1511 | static void | |
1512 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
1513 | struct nfsd4_clid_slot *slot, int nfserr) | |
1514 | { | |
1515 | slot->sl_status = nfserr; | |
1516 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
1517 | } | |
1518 | ||
1519 | static __be32 | |
1520 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
1521 | struct nfsd4_clid_slot *slot) | |
1522 | { | |
1523 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
1524 | return slot->sl_status; | |
1525 | } | |
1526 | ||
1b74c25b MJ |
1527 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
1528 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
1529 | 1 + /* MIN tag is length with zero, only length */ \ | |
1530 | 3 + /* version, opcount, opcode */ \ | |
1531 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1532 | /* seqid, slotID, slotID, cache */ \ | |
1533 | 4 ) * sizeof(__be32)) | |
1534 | ||
1535 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
1536 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
1537 | 1 + /* status */ \ | |
1538 | 1 + /* MIN tag is length with zero, only length */ \ | |
1539 | 3 + /* opcount, opcode, opstatus*/ \ | |
1540 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1541 | /* seqid, slotID, slotID, slotID, status */ \ | |
1542 | 5 ) * sizeof(__be32)) | |
1543 | ||
1544 | static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs fchannel) | |
1545 | { | |
1546 | return fchannel.maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ | |
1547 | || fchannel.maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ; | |
1548 | } | |
1549 | ||
069b6ad4 AA |
1550 | __be32 |
1551 | nfsd4_create_session(struct svc_rqst *rqstp, | |
1552 | struct nfsd4_compound_state *cstate, | |
1553 | struct nfsd4_create_session *cr_ses) | |
1554 | { | |
363168b4 | 1555 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 1556 | struct nfs4_client *conf, *unconf; |
ac7c46f2 | 1557 | struct nfsd4_session *new; |
49557cc7 | 1558 | struct nfsd4_clid_slot *cs_slot = NULL; |
86c3e16c | 1559 | bool confirm_me = false; |
ec6b5d7b AA |
1560 | int status = 0; |
1561 | ||
a62573dc MJ |
1562 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
1563 | return nfserr_inval; | |
1564 | ||
ec6b5d7b AA |
1565 | nfs4_lock_state(); |
1566 | unconf = find_unconfirmed_client(&cr_ses->clientid); | |
1567 | conf = find_confirmed_client(&cr_ses->clientid); | |
1568 | ||
1569 | if (conf) { | |
49557cc7 AA |
1570 | cs_slot = &conf->cl_cs_slot; |
1571 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 1572 | if (status == nfserr_replay_cache) { |
ec6b5d7b | 1573 | dprintk("Got a create_session replay! seqid= %d\n", |
49557cc7 | 1574 | cs_slot->sl_seqid); |
38eb76a5 | 1575 | /* Return the cached reply status */ |
49557cc7 | 1576 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
38eb76a5 | 1577 | goto out; |
49557cc7 | 1578 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b AA |
1579 | status = nfserr_seq_misordered; |
1580 | dprintk("Sequence misordered!\n"); | |
1581 | dprintk("Expected seqid= %d but got seqid= %d\n", | |
49557cc7 | 1582 | cs_slot->sl_seqid, cr_ses->seqid); |
ec6b5d7b AA |
1583 | goto out; |
1584 | } | |
ec6b5d7b AA |
1585 | } else if (unconf) { |
1586 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || | |
363168b4 | 1587 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b AA |
1588 | status = nfserr_clid_inuse; |
1589 | goto out; | |
1590 | } | |
1591 | ||
49557cc7 AA |
1592 | cs_slot = &unconf->cl_cs_slot; |
1593 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
1594 | if (status) { |
1595 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 1596 | status = nfserr_seq_misordered; |
cd5b8144 | 1597 | goto out; |
ec6b5d7b AA |
1598 | } |
1599 | ||
86c3e16c | 1600 | confirm_me = true; |
ec6b5d7b AA |
1601 | conf = unconf; |
1602 | } else { | |
1603 | status = nfserr_stale_clientid; | |
1604 | goto out; | |
1605 | } | |
1606 | ||
8323c3b2 BF |
1607 | /* |
1608 | * XXX: we should probably set this at creation time, and check | |
1609 | * for consistent minorversion use throughout: | |
1610 | */ | |
1611 | conf->cl_minorversion = 1; | |
408b79bc BF |
1612 | /* |
1613 | * We do not support RDMA or persistent sessions | |
1614 | */ | |
1615 | cr_ses->flags &= ~SESSION4_PERSIST; | |
1616 | cr_ses->flags &= ~SESSION4_RDMA; | |
1617 | ||
1b74c25b MJ |
1618 | status = nfserr_toosmall; |
1619 | if (check_forechannel_attrs(cr_ses->fore_channel)) | |
1620 | goto out; | |
1621 | ||
ac7c46f2 BF |
1622 | status = nfserr_jukebox; |
1623 | new = alloc_init_session(rqstp, conf, cr_ses); | |
1624 | if (!new) | |
ec6b5d7b | 1625 | goto out; |
ac7c46f2 BF |
1626 | status = nfs_ok; |
1627 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, | |
ec6b5d7b | 1628 | NFS4_MAX_SESSIONID_LEN); |
12050657 MJ |
1629 | memcpy(&cr_ses->fore_channel, &new->se_fchannel, |
1630 | sizeof(struct nfsd4_channel_attrs)); | |
86c3e16c | 1631 | cs_slot->sl_seqid++; |
49557cc7 | 1632 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 1633 | |
49557cc7 AA |
1634 | /* cache solo and embedded create sessions under the state lock */ |
1635 | nfsd4_cache_create_session(cr_ses, cs_slot, status); | |
86c3e16c BF |
1636 | if (confirm_me) |
1637 | move_to_confirmed(conf); | |
ec6b5d7b AA |
1638 | out: |
1639 | nfs4_unlock_state(); | |
1640 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1641 | return status; | |
069b6ad4 AA |
1642 | } |
1643 | ||
57716355 BF |
1644 | static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) |
1645 | { | |
1646 | struct nfsd4_compoundres *resp = rqstp->rq_resp; | |
1647 | struct nfsd4_compoundargs *argp = rqstp->rq_argp; | |
1648 | ||
1649 | return argp->opcnt == resp->opcnt; | |
1650 | } | |
1651 | ||
1d1bc8f2 BF |
1652 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
1653 | { | |
1654 | switch (*dir) { | |
1655 | case NFS4_CDFC4_FORE: | |
1656 | case NFS4_CDFC4_BACK: | |
1657 | return nfs_ok; | |
1658 | case NFS4_CDFC4_FORE_OR_BOTH: | |
1659 | case NFS4_CDFC4_BACK_OR_BOTH: | |
1660 | *dir = NFS4_CDFC4_BOTH; | |
1661 | return nfs_ok; | |
1662 | }; | |
1663 | return nfserr_inval; | |
1664 | } | |
1665 | ||
1666 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, | |
1667 | struct nfsd4_compound_state *cstate, | |
1668 | struct nfsd4_bind_conn_to_session *bcts) | |
1669 | { | |
1670 | __be32 status; | |
1671 | ||
1672 | if (!nfsd4_last_compound_op(rqstp)) | |
1673 | return nfserr_not_only_op; | |
1674 | spin_lock(&client_lock); | |
1675 | cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid); | |
1676 | /* Sorta weird: we only need the refcnt'ing because new_conn acquires | |
1677 | * client_lock iself: */ | |
1678 | if (cstate->session) { | |
1679 | nfsd4_get_session(cstate->session); | |
1680 | atomic_inc(&cstate->session->se_client->cl_refcount); | |
1681 | } | |
1682 | spin_unlock(&client_lock); | |
1683 | if (!cstate->session) | |
1684 | return nfserr_badsession; | |
1685 | ||
1686 | status = nfsd4_map_bcts_dir(&bcts->dir); | |
1db2b9dd BS |
1687 | if (!status) |
1688 | nfsd4_new_conn(rqstp, cstate->session, bcts->dir); | |
1689 | return status; | |
1d1bc8f2 BF |
1690 | } |
1691 | ||
5d4cec2f BF |
1692 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
1693 | { | |
1694 | if (!session) | |
1695 | return 0; | |
1696 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
1697 | } | |
1698 | ||
069b6ad4 AA |
1699 | __be32 |
1700 | nfsd4_destroy_session(struct svc_rqst *r, | |
1701 | struct nfsd4_compound_state *cstate, | |
1702 | struct nfsd4_destroy_session *sessionid) | |
1703 | { | |
e10e0cfc BH |
1704 | struct nfsd4_session *ses; |
1705 | u32 status = nfserr_badsession; | |
1706 | ||
1707 | /* Notes: | |
1708 | * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid | |
1709 | * - Should we return nfserr_back_chan_busy if waiting for | |
1710 | * callbacks on to-be-destroyed session? | |
1711 | * - Do we need to clear any callback info from previous session? | |
1712 | */ | |
1713 | ||
5d4cec2f | 1714 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 BF |
1715 | if (!nfsd4_last_compound_op(r)) |
1716 | return nfserr_not_only_op; | |
1717 | } | |
e10e0cfc | 1718 | dump_sessionid(__func__, &sessionid->sessionid); |
9089f1b4 | 1719 | spin_lock(&client_lock); |
e10e0cfc BH |
1720 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid); |
1721 | if (!ses) { | |
9089f1b4 | 1722 | spin_unlock(&client_lock); |
e10e0cfc BH |
1723 | goto out; |
1724 | } | |
1725 | ||
1726 | unhash_session(ses); | |
9089f1b4 | 1727 | spin_unlock(&client_lock); |
e10e0cfc | 1728 | |
ab707e15 | 1729 | nfs4_lock_state(); |
84f5f7cc | 1730 | nfsd4_probe_callback_sync(ses->se_client); |
ab707e15 | 1731 | nfs4_unlock_state(); |
19cf5c02 BF |
1732 | |
1733 | nfsd4_del_conns(ses); | |
1734 | ||
e10e0cfc BH |
1735 | nfsd4_put_session(ses); |
1736 | status = nfs_ok; | |
1737 | out: | |
1738 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1739 | return status; | |
069b6ad4 AA |
1740 | } |
1741 | ||
a663bdd8 | 1742 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
1743 | { |
1744 | struct nfsd4_conn *c; | |
1745 | ||
1746 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 1747 | if (c->cn_xprt == xpt) { |
328ead28 BF |
1748 | return c; |
1749 | } | |
1750 | } | |
1751 | return NULL; | |
1752 | } | |
1753 | ||
a663bdd8 | 1754 | static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
1755 | { |
1756 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 1757 | struct nfsd4_conn *c; |
21b75b01 | 1758 | int ret; |
328ead28 BF |
1759 | |
1760 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 1761 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
328ead28 BF |
1762 | if (c) { |
1763 | spin_unlock(&clp->cl_lock); | |
1764 | free_conn(new); | |
1765 | return; | |
1766 | } | |
1767 | __nfsd4_hash_conn(new, ses); | |
1768 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
1769 | ret = nfsd4_register_conn(new); |
1770 | if (ret) | |
1771 | /* oops; xprt is already down: */ | |
1772 | nfsd4_conn_lost(&new->cn_xpt_user); | |
328ead28 BF |
1773 | return; |
1774 | } | |
1775 | ||
868b89c3 MJ |
1776 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
1777 | { | |
1778 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
1779 | ||
1780 | return args->opcnt > session->se_fchannel.maxops; | |
1781 | } | |
1782 | ||
ae82a8d0 MJ |
1783 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
1784 | struct nfsd4_session *session) | |
1785 | { | |
1786 | struct xdr_buf *xb = &rqstp->rq_arg; | |
1787 | ||
1788 | return xb->len > session->se_fchannel.maxreq_sz; | |
1789 | } | |
1790 | ||
069b6ad4 | 1791 | __be32 |
b85d4c01 | 1792 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
1793 | struct nfsd4_compound_state *cstate, |
1794 | struct nfsd4_sequence *seq) | |
1795 | { | |
f9bb94c4 | 1796 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
b85d4c01 BH |
1797 | struct nfsd4_session *session; |
1798 | struct nfsd4_slot *slot; | |
a663bdd8 | 1799 | struct nfsd4_conn *conn; |
b85d4c01 BH |
1800 | int status; |
1801 | ||
f9bb94c4 AA |
1802 | if (resp->opcnt != 1) |
1803 | return nfserr_sequence_pos; | |
1804 | ||
a663bdd8 BF |
1805 | /* |
1806 | * Will be either used or freed by nfsd4_sequence_check_conn | |
1807 | * below. | |
1808 | */ | |
1809 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
1810 | if (!conn) | |
1811 | return nfserr_jukebox; | |
1812 | ||
9089f1b4 | 1813 | spin_lock(&client_lock); |
b85d4c01 BH |
1814 | status = nfserr_badsession; |
1815 | session = find_in_sessionid_hashtbl(&seq->sessionid); | |
1816 | if (!session) | |
1817 | goto out; | |
1818 | ||
868b89c3 MJ |
1819 | status = nfserr_too_many_ops; |
1820 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
1821 | goto out; | |
1822 | ||
ae82a8d0 MJ |
1823 | status = nfserr_req_too_big; |
1824 | if (nfsd4_request_too_big(rqstp, session)) | |
1825 | goto out; | |
1826 | ||
b85d4c01 | 1827 | status = nfserr_badslot; |
6c18ba9f | 1828 | if (seq->slotid >= session->se_fchannel.maxreqs) |
b85d4c01 BH |
1829 | goto out; |
1830 | ||
557ce264 | 1831 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
1832 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
1833 | ||
a8dfdaeb AA |
1834 | /* We do not negotiate the number of slots yet, so set the |
1835 | * maxslots to the session maxreqs which is used to encode | |
1836 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
1837 | seq->maxslots = session->se_fchannel.maxreqs; | |
1838 | ||
88e588d5 | 1839 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, slot->sl_inuse); |
b85d4c01 BH |
1840 | if (status == nfserr_replay_cache) { |
1841 | cstate->slot = slot; | |
1842 | cstate->session = session; | |
da3846a2 | 1843 | /* Return the cached reply status and set cstate->status |
557ce264 | 1844 | * for nfsd4_proc_compound processing */ |
bf864a31 | 1845 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 1846 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 1847 | goto out; |
b85d4c01 BH |
1848 | } |
1849 | if (status) | |
1850 | goto out; | |
1851 | ||
a663bdd8 BF |
1852 | nfsd4_sequence_check_conn(conn, session); |
1853 | conn = NULL; | |
328ead28 | 1854 | |
b85d4c01 BH |
1855 | /* Success! bump slot seqid */ |
1856 | slot->sl_inuse = true; | |
1857 | slot->sl_seqid = seq->seqid; | |
557ce264 | 1858 | slot->sl_cachethis = seq->cachethis; |
b85d4c01 BH |
1859 | |
1860 | cstate->slot = slot; | |
1861 | cstate->session = session; | |
1862 | ||
b85d4c01 | 1863 | out: |
26c0c75e | 1864 | /* Hold a session reference until done processing the compound. */ |
aaf84eb9 | 1865 | if (cstate->session) { |
0d7bb719 BF |
1866 | struct nfs4_client *clp = session->se_client; |
1867 | ||
36acb66b | 1868 | nfsd4_get_session(cstate->session); |
0d7bb719 BF |
1869 | atomic_inc(&clp->cl_refcount); |
1870 | if (clp->cl_cb_state == NFSD4_CB_DOWN) | |
1871 | seq->status_flags |= SEQ4_STATUS_CB_PATH_DOWN; | |
aaf84eb9 | 1872 | } |
a663bdd8 | 1873 | kfree(conn); |
36acb66b | 1874 | spin_unlock(&client_lock); |
b85d4c01 BH |
1875 | dprintk("%s: return %d\n", __func__, ntohl(status)); |
1876 | return status; | |
069b6ad4 AA |
1877 | } |
1878 | ||
4dc6ec00 BF |
1879 | __be32 |
1880 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
1881 | { | |
bcecf1cc MJ |
1882 | int status = 0; |
1883 | ||
4dc6ec00 BF |
1884 | if (rc->rca_one_fs) { |
1885 | if (!cstate->current_fh.fh_dentry) | |
1886 | return nfserr_nofilehandle; | |
1887 | /* | |
1888 | * We don't take advantage of the rca_one_fs case. | |
1889 | * That's OK, it's optional, we can safely ignore it. | |
1890 | */ | |
1891 | return nfs_ok; | |
1892 | } | |
bcecf1cc | 1893 | |
4dc6ec00 | 1894 | nfs4_lock_state(); |
bcecf1cc MJ |
1895 | status = nfserr_complete_already; |
1896 | if (cstate->session->se_client->cl_firststate) | |
1897 | goto out; | |
1898 | ||
1899 | status = nfserr_stale_clientid; | |
1900 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
1901 | /* |
1902 | * The following error isn't really legal. | |
1903 | * But we only get here if the client just explicitly | |
1904 | * destroyed the client. Surely it no longer cares what | |
1905 | * error it gets back on an operation for the dead | |
1906 | * client. | |
1907 | */ | |
bcecf1cc MJ |
1908 | goto out; |
1909 | ||
1910 | status = nfs_ok; | |
4dc6ec00 | 1911 | nfsd4_create_clid_dir(cstate->session->se_client); |
bcecf1cc | 1912 | out: |
4dc6ec00 | 1913 | nfs4_unlock_state(); |
bcecf1cc | 1914 | return status; |
4dc6ec00 BF |
1915 | } |
1916 | ||
b37ad28b | 1917 | __be32 |
b591480b BF |
1918 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
1919 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 1920 | { |
1da177e4 LT |
1921 | struct xdr_netobj clname = { |
1922 | .len = setclid->se_namelen, | |
1923 | .data = setclid->se_name, | |
1924 | }; | |
1925 | nfs4_verifier clverifier = setclid->se_verf; | |
1926 | unsigned int strhashval; | |
28ce6054 | 1927 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 1928 | __be32 status; |
a55370a3 | 1929 | char dname[HEXDIR_LEN]; |
1da177e4 | 1930 | |
1da177e4 | 1931 | if (!check_name(clname)) |
73aea4ec | 1932 | return nfserr_inval; |
1da177e4 | 1933 | |
a55370a3 N |
1934 | status = nfs4_make_rec_clidname(dname, &clname); |
1935 | if (status) | |
73aea4ec | 1936 | return status; |
a55370a3 | 1937 | |
1da177e4 LT |
1938 | /* |
1939 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
1940 | * We get here on a DRC miss. | |
1941 | */ | |
1942 | ||
a55370a3 | 1943 | strhashval = clientstr_hashval(dname); |
1da177e4 | 1944 | |
1da177e4 | 1945 | nfs4_lock_state(); |
e203d506 | 1946 | conf = find_confirmed_client_by_str(dname, strhashval); |
28ce6054 | 1947 | if (conf) { |
a186e767 | 1948 | /* RFC 3530 14.2.33 CASE 0: */ |
1da177e4 | 1949 | status = nfserr_clid_inuse; |
e203d506 BF |
1950 | if (clp_used_exchangeid(conf)) |
1951 | goto out; | |
026722c2 | 1952 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
1953 | char addr_str[INET6_ADDRSTRLEN]; |
1954 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
1955 | sizeof(addr_str)); | |
1956 | dprintk("NFSD: setclientid: string in use by client " | |
1957 | "at %s\n", addr_str); | |
1da177e4 LT |
1958 | goto out; |
1959 | } | |
1da177e4 | 1960 | } |
a186e767 BF |
1961 | /* |
1962 | * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") | |
1963 | * has a description of SETCLIENTID request processing consisting | |
1964 | * of 5 bullet points, labeled as CASE0 - CASE4 below. | |
1965 | */ | |
e203d506 | 1966 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
3e772463 | 1967 | status = nfserr_jukebox; |
1da177e4 | 1968 | if (!conf) { |
a186e767 BF |
1969 | /* |
1970 | * RFC 3530 14.2.33 CASE 4: | |
1971 | * placed first, because it is the normal case | |
1da177e4 LT |
1972 | */ |
1973 | if (unconf) | |
1974 | expire_client(unconf); | |
b09333c4 | 1975 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 1976 | if (new == NULL) |
1da177e4 | 1977 | goto out; |
1da177e4 | 1978 | gen_clid(new); |
599e0a22 | 1979 | } else if (same_verf(&conf->cl_verifier, &clverifier)) { |
1da177e4 | 1980 | /* |
a186e767 BF |
1981 | * RFC 3530 14.2.33 CASE 1: |
1982 | * probable callback update | |
1da177e4 | 1983 | */ |
31f4a6c1 N |
1984 | if (unconf) { |
1985 | /* Note this is removing unconfirmed {*x***}, | |
1986 | * which is stronger than RFC recommended {vxc**}. | |
1987 | * This has the advantage that there is at most | |
1988 | * one {*x***} in either list at any time. | |
1989 | */ | |
1990 | expire_client(unconf); | |
1da177e4 | 1991 | } |
b09333c4 | 1992 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 1993 | if (new == NULL) |
1da177e4 | 1994 | goto out; |
1da177e4 | 1995 | copy_clid(new, conf); |
1da177e4 LT |
1996 | } else if (!unconf) { |
1997 | /* | |
a186e767 BF |
1998 | * RFC 3530 14.2.33 CASE 2: |
1999 | * probable client reboot; state will be removed if | |
2000 | * confirmed. | |
1da177e4 | 2001 | */ |
b09333c4 | 2002 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 2003 | if (new == NULL) |
1da177e4 | 2004 | goto out; |
1da177e4 | 2005 | gen_clid(new); |
49ba8781 | 2006 | } else { |
a186e767 BF |
2007 | /* |
2008 | * RFC 3530 14.2.33 CASE 3: | |
2009 | * probable client reboot; state will be removed if | |
2010 | * confirmed. | |
1da177e4 LT |
2011 | */ |
2012 | expire_client(unconf); | |
b09333c4 | 2013 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 2014 | if (new == NULL) |
1da177e4 | 2015 | goto out; |
1da177e4 | 2016 | gen_clid(new); |
1da177e4 | 2017 | } |
8323c3b2 BF |
2018 | /* |
2019 | * XXX: we should probably set this at creation time, and check | |
2020 | * for consistent minorversion use throughout: | |
2021 | */ | |
2022 | new->cl_minorversion = 0; | |
6f3d772f | 2023 | gen_callback(new, setclid, rqstp); |
c175b83c | 2024 | add_to_unconfirmed(new, strhashval); |
1da177e4 LT |
2025 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
2026 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
2027 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
2028 | status = nfs_ok; | |
2029 | out: | |
2030 | nfs4_unlock_state(); | |
2031 | return status; | |
2032 | } | |
2033 | ||
2034 | ||
2035 | /* | |
a186e767 BF |
2036 | * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has |
2037 | * a description of SETCLIENTID_CONFIRM request processing consisting of 4 | |
2038 | * bullets, labeled as CASE1 - CASE4 below. | |
1da177e4 | 2039 | */ |
b37ad28b | 2040 | __be32 |
b591480b BF |
2041 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
2042 | struct nfsd4_compound_state *cstate, | |
2043 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 2044 | { |
363168b4 | 2045 | struct sockaddr *sa = svc_addr(rqstp); |
21ab45a4 | 2046 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
2047 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
2048 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 2049 | __be32 status; |
1da177e4 LT |
2050 | |
2051 | if (STALE_CLIENTID(clid)) | |
2052 | return nfserr_stale_clientid; | |
2053 | /* | |
2054 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
2055 | * We get here on a DRC miss. | |
2056 | */ | |
2057 | ||
2058 | nfs4_lock_state(); | |
21ab45a4 N |
2059 | |
2060 | conf = find_confirmed_client(clid); | |
2061 | unconf = find_unconfirmed_client(clid); | |
2062 | ||
2063 | status = nfserr_clid_inuse; | |
363168b4 | 2064 | if (conf && !rpc_cmp_addr((struct sockaddr *) &conf->cl_addr, sa)) |
21ab45a4 | 2065 | goto out; |
363168b4 | 2066 | if (unconf && !rpc_cmp_addr((struct sockaddr *) &unconf->cl_addr, sa)) |
21ab45a4 N |
2067 | goto out; |
2068 | ||
a186e767 BF |
2069 | /* |
2070 | * section 14.2.34 of RFC 3530 has a description of | |
2071 | * SETCLIENTID_CONFIRM request processing consisting | |
2072 | * of 4 bullet points, labeled as CASE1 - CASE4 below. | |
2073 | */ | |
366e0c1d | 2074 | if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { |
a186e767 BF |
2075 | /* |
2076 | * RFC 3530 14.2.34 CASE 1: | |
2077 | * callback update | |
2078 | */ | |
599e0a22 | 2079 | if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) |
1da177e4 LT |
2080 | status = nfserr_clid_inuse; |
2081 | else { | |
5a3c9d71 BF |
2082 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
2083 | nfsd4_probe_callback(conf); | |
1a69c179 | 2084 | expire_client(unconf); |
1da177e4 | 2085 | status = nfs_ok; |
1a69c179 | 2086 | |
1da177e4 | 2087 | } |
f3aba4e5 | 2088 | } else if (conf && !unconf) { |
a186e767 BF |
2089 | /* |
2090 | * RFC 3530 14.2.34 CASE 2: | |
2091 | * probable retransmitted request; play it safe and | |
2092 | * do nothing. | |
7c79f737 | 2093 | */ |
599e0a22 | 2094 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) |
1da177e4 | 2095 | status = nfserr_clid_inuse; |
21ab45a4 | 2096 | else |
1da177e4 | 2097 | status = nfs_ok; |
7c79f737 | 2098 | } else if (!conf && unconf |
599e0a22 | 2099 | && same_verf(&unconf->cl_confirm, &confirm)) { |
a186e767 BF |
2100 | /* |
2101 | * RFC 3530 14.2.34 CASE 3: | |
2102 | * Normal case; new or rebooted client: | |
7c79f737 | 2103 | */ |
599e0a22 | 2104 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { |
1da177e4 LT |
2105 | status = nfserr_clid_inuse; |
2106 | } else { | |
1a69c179 N |
2107 | unsigned int hash = |
2108 | clientstr_hashval(unconf->cl_recdir); | |
2109 | conf = find_confirmed_client_by_str(unconf->cl_recdir, | |
e203d506 | 2110 | hash); |
1a69c179 | 2111 | if (conf) { |
c7b9a459 | 2112 | nfsd4_remove_clid_dir(conf); |
1a69c179 N |
2113 | expire_client(conf); |
2114 | } | |
1da177e4 | 2115 | move_to_confirmed(unconf); |
21ab45a4 | 2116 | conf = unconf; |
5a3c9d71 | 2117 | nfsd4_probe_callback(conf); |
1a69c179 | 2118 | status = nfs_ok; |
1da177e4 | 2119 | } |
599e0a22 BF |
2120 | } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) |
2121 | && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, | |
7c79f737 | 2122 | &confirm)))) { |
a186e767 BF |
2123 | /* |
2124 | * RFC 3530 14.2.34 CASE 4: | |
2125 | * Client probably hasn't noticed that we rebooted yet. | |
7c79f737 | 2126 | */ |
1da177e4 | 2127 | status = nfserr_stale_clientid; |
7c79f737 | 2128 | } else { |
08e8987c N |
2129 | /* check that we have hit one of the cases...*/ |
2130 | status = nfserr_clid_inuse; | |
2131 | } | |
1da177e4 | 2132 | out: |
1da177e4 LT |
2133 | nfs4_unlock_state(); |
2134 | return status; | |
2135 | } | |
2136 | ||
1da177e4 LT |
2137 | /* OPEN Share state helper functions */ |
2138 | static inline struct nfs4_file * | |
2139 | alloc_init_file(struct inode *ino) | |
2140 | { | |
2141 | struct nfs4_file *fp; | |
2142 | unsigned int hashval = file_hashval(ino); | |
2143 | ||
e60d4398 N |
2144 | fp = kmem_cache_alloc(file_slab, GFP_KERNEL); |
2145 | if (fp) { | |
8b671b80 | 2146 | atomic_set(&fp->fi_ref, 1); |
1da177e4 | 2147 | INIT_LIST_HEAD(&fp->fi_hash); |
8beefa24 N |
2148 | INIT_LIST_HEAD(&fp->fi_stateids); |
2149 | INIT_LIST_HEAD(&fp->fi_delegations); | |
1da177e4 LT |
2150 | fp->fi_inode = igrab(ino); |
2151 | fp->fi_id = current_fileid++; | |
47f9940c | 2152 | fp->fi_had_conflict = false; |
acfdf5c3 | 2153 | fp->fi_lease = NULL; |
f9d7562f BF |
2154 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); |
2155 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
47cee541 PE |
2156 | spin_lock(&recall_lock); |
2157 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); | |
2158 | spin_unlock(&recall_lock); | |
1da177e4 LT |
2159 | return fp; |
2160 | } | |
2161 | return NULL; | |
2162 | } | |
2163 | ||
e60d4398 | 2164 | static void |
e18b890b | 2165 | nfsd4_free_slab(struct kmem_cache **slab) |
1da177e4 | 2166 | { |
e60d4398 N |
2167 | if (*slab == NULL) |
2168 | return; | |
1a1d92c1 | 2169 | kmem_cache_destroy(*slab); |
e60d4398 | 2170 | *slab = NULL; |
1da177e4 LT |
2171 | } |
2172 | ||
e8ff2a84 | 2173 | void |
1da177e4 LT |
2174 | nfsd4_free_slabs(void) |
2175 | { | |
e60d4398 N |
2176 | nfsd4_free_slab(&stateowner_slab); |
2177 | nfsd4_free_slab(&file_slab); | |
5ac049ac | 2178 | nfsd4_free_slab(&stateid_slab); |
5b2d21c1 | 2179 | nfsd4_free_slab(&deleg_slab); |
e60d4398 | 2180 | } |
1da177e4 | 2181 | |
e60d4398 N |
2182 | static int |
2183 | nfsd4_init_slabs(void) | |
2184 | { | |
2185 | stateowner_slab = kmem_cache_create("nfsd4_stateowners", | |
20c2df83 | 2186 | sizeof(struct nfs4_stateowner), 0, 0, NULL); |
e60d4398 N |
2187 | if (stateowner_slab == NULL) |
2188 | goto out_nomem; | |
2189 | file_slab = kmem_cache_create("nfsd4_files", | |
20c2df83 | 2190 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 N |
2191 | if (file_slab == NULL) |
2192 | goto out_nomem; | |
5ac049ac | 2193 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
20c2df83 | 2194 | sizeof(struct nfs4_stateid), 0, 0, NULL); |
5ac049ac N |
2195 | if (stateid_slab == NULL) |
2196 | goto out_nomem; | |
5b2d21c1 | 2197 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 2198 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 N |
2199 | if (deleg_slab == NULL) |
2200 | goto out_nomem; | |
e60d4398 N |
2201 | return 0; |
2202 | out_nomem: | |
2203 | nfsd4_free_slabs(); | |
2204 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | |
2205 | return -ENOMEM; | |
1da177e4 LT |
2206 | } |
2207 | ||
2208 | void | |
2209 | nfs4_free_stateowner(struct kref *kref) | |
2210 | { | |
2211 | struct nfs4_stateowner *sop = | |
2212 | container_of(kref, struct nfs4_stateowner, so_ref); | |
2213 | kfree(sop->so_owner.data); | |
2214 | kmem_cache_free(stateowner_slab, sop); | |
2215 | } | |
2216 | ||
ff194bd9 | 2217 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 2218 | { |
ff194bd9 BF |
2219 | rp->rp_status = nfserr_serverfault; |
2220 | rp->rp_buflen = 0; | |
2221 | rp->rp_buf = rp->rp_ibuf; | |
1da177e4 LT |
2222 | } |
2223 | ||
ff194bd9 BF |
2224 | static inline struct nfs4_stateowner *alloc_stateowner(struct xdr_netobj *owner, struct nfs4_client *clp) |
2225 | { | |
1da177e4 | 2226 | struct nfs4_stateowner *sop; |
1da177e4 | 2227 | |
ff194bd9 BF |
2228 | sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL); |
2229 | if (!sop) | |
2230 | return NULL; | |
2231 | ||
2232 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); | |
2233 | if (!sop->so_owner.data) { | |
2234 | kmem_cache_free(stateowner_slab, sop); | |
1da177e4 | 2235 | return NULL; |
ff194bd9 BF |
2236 | } |
2237 | sop->so_owner.len = owner->len; | |
2238 | ||
2239 | kref_init(&sop->so_ref); | |
1da177e4 | 2240 | INIT_LIST_HEAD(&sop->so_perclient); |
ea1da636 | 2241 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 | 2242 | INIT_LIST_HEAD(&sop->so_perstateid); |
1da177e4 | 2243 | INIT_LIST_HEAD(&sop->so_close_lru); |
ff194bd9 | 2244 | sop->so_id = current_ownerid++; |
1da177e4 | 2245 | sop->so_time = 0; |
ff194bd9 BF |
2246 | sop->so_client = clp; |
2247 | init_nfs4_replay(&sop->so_replay); | |
2248 | return sop; | |
2249 | } | |
2250 | ||
2251 | static void hash_openowner(struct nfs4_stateowner *sop, struct nfs4_client *clp, unsigned int strhashval) | |
2252 | { | |
2253 | unsigned int idhashval; | |
2254 | ||
2255 | idhashval = open_ownerid_hashval(sop->so_id); | |
506f275f BF |
2256 | list_add(&sop->so_idhash, &open_ownerid_hashtbl[idhashval]); |
2257 | list_add(&sop->so_strhash, &open_ownerstr_hashtbl[strhashval]); | |
ea1da636 | 2258 | list_add(&sop->so_perclient, &clp->cl_openowners); |
ff194bd9 BF |
2259 | } |
2260 | ||
2261 | static struct nfs4_stateowner * | |
2262 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { | |
2263 | struct nfs4_stateowner *sop; | |
2264 | ||
2265 | sop = alloc_stateowner(&open->op_owner, clp); | |
2266 | if (!sop) | |
2267 | return NULL; | |
1da177e4 | 2268 | sop->so_is_open_owner = 1; |
1da177e4 LT |
2269 | sop->so_seqid = open->op_seqid; |
2270 | sop->so_confirmed = 0; | |
ff194bd9 | 2271 | hash_openowner(sop, clp, strhashval); |
1da177e4 LT |
2272 | return sop; |
2273 | } | |
2274 | ||
1da177e4 LT |
2275 | static inline void |
2276 | init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { | |
2277 | struct nfs4_stateowner *sop = open->op_stateowner; | |
2278 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); | |
2279 | ||
2280 | INIT_LIST_HEAD(&stp->st_hash); | |
ea1da636 N |
2281 | INIT_LIST_HEAD(&stp->st_perstateowner); |
2282 | INIT_LIST_HEAD(&stp->st_lockowners); | |
1da177e4 LT |
2283 | INIT_LIST_HEAD(&stp->st_perfile); |
2284 | list_add(&stp->st_hash, &stateid_hashtbl[hashval]); | |
ea1da636 | 2285 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
8beefa24 | 2286 | list_add(&stp->st_perfile, &fp->fi_stateids); |
5fa0bbb4 | 2287 | stp->st_type = NFS4_OPEN_STID; |
1da177e4 | 2288 | stp->st_stateowner = sop; |
13cd2184 | 2289 | get_nfs4_file(fp); |
1da177e4 | 2290 | stp->st_file = fp; |
e4e83ea4 | 2291 | stp->st_stateid.si_boot = boot_time; |
1da177e4 LT |
2292 | stp->st_stateid.si_stateownerid = sop->so_id; |
2293 | stp->st_stateid.si_fileid = fp->fi_id; | |
73997dc4 | 2294 | /* note will be incremented before first return to client: */ |
1da177e4 LT |
2295 | stp->st_stateid.si_generation = 0; |
2296 | stp->st_access_bmap = 0; | |
2297 | stp->st_deny_bmap = 0; | |
84459a11 AA |
2298 | __set_bit(open->op_share_access & ~NFS4_SHARE_WANT_MASK, |
2299 | &stp->st_access_bmap); | |
1da177e4 | 2300 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
4c4cd222 | 2301 | stp->st_openstp = NULL; |
1da177e4 LT |
2302 | } |
2303 | ||
fd39ca9a | 2304 | static void |
1da177e4 LT |
2305 | move_to_close_lru(struct nfs4_stateowner *sop) |
2306 | { | |
2307 | dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); | |
2308 | ||
358dd55a | 2309 | list_move_tail(&sop->so_close_lru, &close_lru); |
1da177e4 LT |
2310 | sop->so_time = get_seconds(); |
2311 | } | |
2312 | ||
1da177e4 | 2313 | static int |
599e0a22 BF |
2314 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
2315 | clientid_t *clid) | |
2316 | { | |
2317 | return (sop->so_owner.len == owner->len) && | |
2318 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
2319 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
2320 | } |
2321 | ||
2322 | static struct nfs4_stateowner * | |
2323 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) | |
2324 | { | |
2325 | struct nfs4_stateowner *so = NULL; | |
2326 | ||
506f275f | 2327 | list_for_each_entry(so, &open_ownerstr_hashtbl[hashval], so_strhash) { |
599e0a22 | 2328 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) |
1da177e4 LT |
2329 | return so; |
2330 | } | |
2331 | return NULL; | |
2332 | } | |
2333 | ||
2334 | /* search file_hashtbl[] for file */ | |
2335 | static struct nfs4_file * | |
2336 | find_file(struct inode *ino) | |
2337 | { | |
2338 | unsigned int hashval = file_hashval(ino); | |
2339 | struct nfs4_file *fp; | |
2340 | ||
8b671b80 | 2341 | spin_lock(&recall_lock); |
1da177e4 | 2342 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
13cd2184 N |
2343 | if (fp->fi_inode == ino) { |
2344 | get_nfs4_file(fp); | |
8b671b80 | 2345 | spin_unlock(&recall_lock); |
1da177e4 | 2346 | return fp; |
13cd2184 | 2347 | } |
1da177e4 | 2348 | } |
8b671b80 | 2349 | spin_unlock(&recall_lock); |
1da177e4 LT |
2350 | return NULL; |
2351 | } | |
2352 | ||
d87a8ade | 2353 | static inline int access_valid(u32 x, u32 minorversion) |
ba5a6a19 | 2354 | { |
d87a8ade | 2355 | if ((x & NFS4_SHARE_ACCESS_MASK) < NFS4_SHARE_ACCESS_READ) |
8838dc43 | 2356 | return 0; |
d87a8ade AA |
2357 | if ((x & NFS4_SHARE_ACCESS_MASK) > NFS4_SHARE_ACCESS_BOTH) |
2358 | return 0; | |
2359 | x &= ~NFS4_SHARE_ACCESS_MASK; | |
2360 | if (minorversion && x) { | |
2361 | if ((x & NFS4_SHARE_WANT_MASK) > NFS4_SHARE_WANT_CANCEL) | |
2362 | return 0; | |
2363 | if ((x & NFS4_SHARE_WHEN_MASK) > NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED) | |
2364 | return 0; | |
2365 | x &= ~(NFS4_SHARE_WANT_MASK | NFS4_SHARE_WHEN_MASK); | |
2366 | } | |
2367 | if (x) | |
8838dc43 BF |
2368 | return 0; |
2369 | return 1; | |
ba5a6a19 BF |
2370 | } |
2371 | ||
8838dc43 | 2372 | static inline int deny_valid(u32 x) |
ba5a6a19 | 2373 | { |
8838dc43 BF |
2374 | /* Note: unlike access bits, deny bits may be zero. */ |
2375 | return x <= NFS4_SHARE_DENY_BOTH; | |
ba5a6a19 | 2376 | } |
1da177e4 | 2377 | |
1da177e4 LT |
2378 | /* |
2379 | * Called to check deny when READ with all zero stateid or | |
2380 | * WRITE with all zero or all one stateid | |
2381 | */ | |
b37ad28b | 2382 | static __be32 |
1da177e4 LT |
2383 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
2384 | { | |
2385 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2386 | struct nfs4_file *fp; | |
2387 | struct nfs4_stateid *stp; | |
b37ad28b | 2388 | __be32 ret; |
1da177e4 LT |
2389 | |
2390 | dprintk("NFSD: nfs4_share_conflict\n"); | |
2391 | ||
2392 | fp = find_file(ino); | |
13cd2184 N |
2393 | if (!fp) |
2394 | return nfs_ok; | |
b700949b | 2395 | ret = nfserr_locked; |
1da177e4 | 2396 | /* Search for conflicting share reservations */ |
13cd2184 N |
2397 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
2398 | if (test_bit(deny_type, &stp->st_deny_bmap) || | |
2399 | test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) | |
2400 | goto out; | |
1da177e4 | 2401 | } |
13cd2184 N |
2402 | ret = nfs_ok; |
2403 | out: | |
2404 | put_nfs4_file(fp); | |
2405 | return ret; | |
1da177e4 LT |
2406 | } |
2407 | ||
6b57d9c8 | 2408 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
1da177e4 | 2409 | { |
1da177e4 LT |
2410 | /* We're assuming the state code never drops its reference |
2411 | * without first removing the lease. Since we're in this lease | |
2412 | * callback (and since the lease code is serialized by the kernel | |
2413 | * lock) we know the server hasn't removed the lease yet, we know | |
2414 | * it's safe to take a reference: */ | |
2415 | atomic_inc(&dp->dl_count); | |
2416 | ||
1da177e4 | 2417 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); |
1da177e4 | 2418 | |
460781b5 | 2419 | /* only place dl_time is set. protected by lock_flocks*/ |
1da177e4 LT |
2420 | dp->dl_time = get_seconds(); |
2421 | ||
6b57d9c8 BF |
2422 | nfsd4_cb_recall(dp); |
2423 | } | |
2424 | ||
acfdf5c3 | 2425 | /* Called from break_lease() with lock_flocks() held. */ |
6b57d9c8 BF |
2426 | static void nfsd_break_deleg_cb(struct file_lock *fl) |
2427 | { | |
acfdf5c3 BF |
2428 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
2429 | struct nfs4_delegation *dp; | |
6b57d9c8 | 2430 | |
acfdf5c3 BF |
2431 | BUG_ON(!fp); |
2432 | /* We assume break_lease is only called once per lease: */ | |
2433 | BUG_ON(fp->fi_had_conflict); | |
0272e1fd BF |
2434 | /* |
2435 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 2436 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 2437 | * in time: |
0272e1fd BF |
2438 | */ |
2439 | fl->fl_break_time = 0; | |
1da177e4 | 2440 | |
5d926e8c | 2441 | spin_lock(&recall_lock); |
acfdf5c3 BF |
2442 | fp->fi_had_conflict = true; |
2443 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
2444 | nfsd_break_one_deleg(dp); | |
5d926e8c | 2445 | spin_unlock(&recall_lock); |
1da177e4 LT |
2446 | } |
2447 | ||
1da177e4 LT |
2448 | static |
2449 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
2450 | { | |
2451 | if (arg & F_UNLCK) | |
2452 | return lease_modify(onlist, arg); | |
2453 | else | |
2454 | return -EAGAIN; | |
2455 | } | |
2456 | ||
7b021967 | 2457 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
2458 | .lm_break = nfsd_break_deleg_cb, |
2459 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
2460 | }; |
2461 | ||
2462 | ||
b37ad28b | 2463 | __be32 |
6668958f AA |
2464 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
2465 | struct nfsd4_open *open) | |
1da177e4 | 2466 | { |
1da177e4 LT |
2467 | clientid_t *clientid = &open->op_clientid; |
2468 | struct nfs4_client *clp = NULL; | |
2469 | unsigned int strhashval; | |
2470 | struct nfs4_stateowner *sop = NULL; | |
2471 | ||
1da177e4 | 2472 | if (!check_name(open->op_owner)) |
0f442aa2 | 2473 | return nfserr_inval; |
1da177e4 LT |
2474 | |
2475 | if (STALE_CLIENTID(&open->op_clientid)) | |
2476 | return nfserr_stale_clientid; | |
2477 | ||
506f275f | 2478 | strhashval = open_ownerstr_hashval(clientid->cl_id, &open->op_owner); |
1da177e4 | 2479 | sop = find_openstateowner_str(strhashval, open); |
0f442aa2 BF |
2480 | open->op_stateowner = sop; |
2481 | if (!sop) { | |
2482 | /* Make sure the client's lease hasn't expired. */ | |
1da177e4 LT |
2483 | clp = find_confirmed_client(clientid); |
2484 | if (clp == NULL) | |
0f442aa2 BF |
2485 | return nfserr_expired; |
2486 | goto renew; | |
1da177e4 | 2487 | } |
6668958f AA |
2488 | /* When sessions are used, skip open sequenceid processing */ |
2489 | if (nfsd4_has_session(cstate)) | |
2490 | goto renew; | |
0f442aa2 BF |
2491 | if (!sop->so_confirmed) { |
2492 | /* Replace unconfirmed owners without checking for replay. */ | |
2493 | clp = sop->so_client; | |
f044ff83 | 2494 | release_openowner(sop); |
0f442aa2 BF |
2495 | open->op_stateowner = NULL; |
2496 | goto renew; | |
2497 | } | |
2498 | if (open->op_seqid == sop->so_seqid - 1) { | |
2499 | if (sop->so_replay.rp_buflen) | |
a90b061c | 2500 | return nfserr_replay_me; |
0f442aa2 BF |
2501 | /* The original OPEN failed so spectacularly |
2502 | * that we don't even have replay data saved! | |
2503 | * Therefore, we have no choice but to continue | |
2504 | * processing this OPEN; presumably, we'll | |
2505 | * fail again for the same reason. | |
2506 | */ | |
2507 | dprintk("nfsd4_process_open1: replay with no replay cache\n"); | |
2508 | goto renew; | |
2509 | } | |
2510 | if (open->op_seqid != sop->so_seqid) | |
2511 | return nfserr_bad_seqid; | |
1da177e4 | 2512 | renew: |
0f442aa2 BF |
2513 | if (open->op_stateowner == NULL) { |
2514 | sop = alloc_init_open_stateowner(strhashval, clp, open); | |
2515 | if (sop == NULL) | |
3e772463 | 2516 | return nfserr_jukebox; |
0f442aa2 BF |
2517 | open->op_stateowner = sop; |
2518 | } | |
2519 | list_del_init(&sop->so_close_lru); | |
1da177e4 | 2520 | renew_client(sop->so_client); |
0f442aa2 | 2521 | return nfs_ok; |
1da177e4 LT |
2522 | } |
2523 | ||
b37ad28b | 2524 | static inline __be32 |
4a6e43e6 N |
2525 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
2526 | { | |
2527 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
2528 | return nfserr_openmode; | |
2529 | else | |
2530 | return nfs_ok; | |
2531 | } | |
2532 | ||
52f4fb43 N |
2533 | static struct nfs4_delegation * |
2534 | find_delegation_file(struct nfs4_file *fp, stateid_t *stid) | |
2535 | { | |
32b007b4 | 2536 | struct nfs4_delegation *dp; |
52f4fb43 | 2537 | |
acfdf5c3 | 2538 | spin_lock(&recall_lock); |
32b007b4 BF |
2539 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) |
2540 | if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) { | |
2541 | spin_unlock(&recall_lock); | |
2542 | return dp; | |
2543 | } | |
acfdf5c3 | 2544 | spin_unlock(&recall_lock); |
32b007b4 | 2545 | return NULL; |
52f4fb43 N |
2546 | } |
2547 | ||
c47d832b | 2548 | static int share_access_to_flags(u32 share_access) |
24a0111e BF |
2549 | { |
2550 | share_access &= ~NFS4_SHARE_WANT_MASK; | |
2551 | ||
2552 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; | |
2553 | } | |
2554 | ||
b37ad28b | 2555 | static __be32 |
567d9829 N |
2556 | nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, |
2557 | struct nfs4_delegation **dp) | |
2558 | { | |
2559 | int flags; | |
b37ad28b | 2560 | __be32 status = nfserr_bad_stateid; |
567d9829 N |
2561 | |
2562 | *dp = find_delegation_file(fp, &open->op_delegate_stateid); | |
2563 | if (*dp == NULL) | |
c44c5eeb | 2564 | goto out; |
24a0111e | 2565 | flags = share_access_to_flags(open->op_share_access); |
567d9829 N |
2566 | status = nfs4_check_delegmode(*dp, flags); |
2567 | if (status) | |
2568 | *dp = NULL; | |
c44c5eeb N |
2569 | out: |
2570 | if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2571 | return nfs_ok; | |
2572 | if (status) | |
2573 | return status; | |
2574 | open->op_stateowner->so_confirmed = 1; | |
2575 | return nfs_ok; | |
567d9829 N |
2576 | } |
2577 | ||
b37ad28b | 2578 | static __be32 |
1da177e4 LT |
2579 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) |
2580 | { | |
2581 | struct nfs4_stateid *local; | |
b37ad28b | 2582 | __be32 status = nfserr_share_denied; |
1da177e4 LT |
2583 | struct nfs4_stateowner *sop = open->op_stateowner; |
2584 | ||
8beefa24 | 2585 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
2586 | /* ignore lock owners */ |
2587 | if (local->st_stateowner->so_is_open_owner == 0) | |
2588 | continue; | |
2589 | /* remember if we have seen this open owner */ | |
2590 | if (local->st_stateowner == sop) | |
2591 | *stpp = local; | |
2592 | /* check for conflicting share reservations */ | |
2593 | if (!test_share(local, open)) | |
2594 | goto out; | |
2595 | } | |
2596 | status = 0; | |
2597 | out: | |
2598 | return status; | |
2599 | } | |
2600 | ||
5ac049ac N |
2601 | static inline struct nfs4_stateid * |
2602 | nfs4_alloc_stateid(void) | |
2603 | { | |
2604 | return kmem_cache_alloc(stateid_slab, GFP_KERNEL); | |
2605 | } | |
2606 | ||
21fb4016 BF |
2607 | static inline int nfs4_access_to_access(u32 nfs4_access) |
2608 | { | |
2609 | int flags = 0; | |
2610 | ||
2611 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
2612 | flags |= NFSD_MAY_READ; | |
2613 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
2614 | flags |= NFSD_MAY_WRITE; | |
2615 | return flags; | |
2616 | } | |
2617 | ||
0c12eaff CB |
2618 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
2619 | struct svc_fh *cur_fh, struct nfsd4_open *open) | |
f9d7562f BF |
2620 | { |
2621 | __be32 status; | |
0c12eaff CB |
2622 | int oflag = nfs4_access_to_omode(open->op_share_access); |
2623 | int access = nfs4_access_to_access(open->op_share_access); | |
2624 | ||
2625 | /* CLAIM_DELEGATE_CUR is used in response to a broken lease; | |
2626 | * allowing it to break the lease and return EAGAIN leaves the | |
2627 | * client unable to make progress in returning the delegation */ | |
2628 | if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2629 | access |= NFSD_MAY_NOT_BREAK_LEASE; | |
f9d7562f BF |
2630 | |
2631 | if (!fp->fi_fds[oflag]) { | |
2632 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, | |
2633 | &fp->fi_fds[oflag]); | |
f9d7562f BF |
2634 | if (status) |
2635 | return status; | |
2636 | } | |
2637 | nfs4_file_get_access(fp, oflag); | |
2638 | ||
2639 | return nfs_ok; | |
2640 | } | |
2641 | ||
b37ad28b | 2642 | static __be32 |
1da177e4 | 2643 | nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, |
f9d7562f BF |
2644 | struct nfs4_file *fp, struct svc_fh *cur_fh, |
2645 | struct nfsd4_open *open) | |
1da177e4 LT |
2646 | { |
2647 | struct nfs4_stateid *stp; | |
f9d7562f | 2648 | __be32 status; |
1da177e4 | 2649 | |
5ac049ac | 2650 | stp = nfs4_alloc_stateid(); |
1da177e4 | 2651 | if (stp == NULL) |
3e772463 | 2652 | return nfserr_jukebox; |
1da177e4 | 2653 | |
0c12eaff | 2654 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); |
f9d7562f BF |
2655 | if (status) { |
2656 | kmem_cache_free(stateid_slab, stp); | |
2657 | return status; | |
1da177e4 | 2658 | } |
1da177e4 LT |
2659 | *stpp = stp; |
2660 | return 0; | |
2661 | } | |
2662 | ||
b37ad28b | 2663 | static inline __be32 |
1da177e4 LT |
2664 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
2665 | struct nfsd4_open *open) | |
2666 | { | |
2667 | struct iattr iattr = { | |
2668 | .ia_valid = ATTR_SIZE, | |
2669 | .ia_size = 0, | |
2670 | }; | |
2671 | if (!open->op_truncate) | |
2672 | return 0; | |
2673 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 2674 | return nfserr_inval; |
1da177e4 LT |
2675 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
2676 | } | |
2677 | ||
b37ad28b | 2678 | static __be32 |
f9d7562f | 2679 | nfs4_upgrade_open(struct svc_rqst *rqstp, struct nfs4_file *fp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open) |
1da177e4 | 2680 | { |
7d947842 BF |
2681 | u32 op_share_access = open->op_share_access & ~NFS4_SHARE_WANT_MASK; |
2682 | bool new_access; | |
b37ad28b | 2683 | __be32 status; |
1da177e4 | 2684 | |
7d947842 | 2685 | new_access = !test_bit(op_share_access, &stp->st_access_bmap); |
f9d7562f | 2686 | if (new_access) { |
0c12eaff | 2687 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); |
f9d7562f BF |
2688 | if (status) |
2689 | return status; | |
6c26d08f | 2690 | } |
1da177e4 LT |
2691 | status = nfsd4_truncate(rqstp, cur_fh, open); |
2692 | if (status) { | |
f9d7562f | 2693 | if (new_access) { |
f197c271 | 2694 | int oflag = nfs4_access_to_omode(op_share_access); |
f9d7562f BF |
2695 | nfs4_file_put_access(fp, oflag); |
2696 | } | |
1da177e4 LT |
2697 | return status; |
2698 | } | |
2699 | /* remember the open */ | |
24a0111e | 2700 | __set_bit(op_share_access, &stp->st_access_bmap); |
b55e0ba1 | 2701 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
1da177e4 LT |
2702 | |
2703 | return nfs_ok; | |
2704 | } | |
2705 | ||
2706 | ||
1da177e4 | 2707 | static void |
37515177 | 2708 | nfs4_set_claim_prev(struct nfsd4_open *open) |
1da177e4 | 2709 | { |
37515177 N |
2710 | open->op_stateowner->so_confirmed = 1; |
2711 | open->op_stateowner->so_client->cl_firststate = 1; | |
1da177e4 LT |
2712 | } |
2713 | ||
14a24e99 BF |
2714 | /* Should we give out recallable state?: */ |
2715 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
2716 | { | |
2717 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
2718 | return true; | |
2719 | /* | |
2720 | * In the sessions case, since we don't have to establish a | |
2721 | * separate connection for callbacks, we assume it's OK | |
2722 | * until we hear otherwise: | |
2723 | */ | |
2724 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
2725 | } | |
2726 | ||
22d38c4c BF |
2727 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) |
2728 | { | |
2729 | struct file_lock *fl; | |
2730 | ||
2731 | fl = locks_alloc_lock(); | |
2732 | if (!fl) | |
2733 | return NULL; | |
2734 | locks_init_lock(fl); | |
2735 | fl->fl_lmops = &nfsd_lease_mng_ops; | |
2736 | fl->fl_flags = FL_LEASE; | |
2737 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; | |
2738 | fl->fl_end = OFFSET_MAX; | |
acfdf5c3 | 2739 | fl->fl_owner = (fl_owner_t)(dp->dl_file); |
22d38c4c | 2740 | fl->fl_pid = current->tgid; |
22d38c4c BF |
2741 | return fl; |
2742 | } | |
2743 | ||
edab9782 BF |
2744 | static int nfs4_setlease(struct nfs4_delegation *dp, int flag) |
2745 | { | |
acfdf5c3 | 2746 | struct nfs4_file *fp = dp->dl_file; |
edab9782 BF |
2747 | struct file_lock *fl; |
2748 | int status; | |
2749 | ||
2750 | fl = nfs4_alloc_init_lease(dp, flag); | |
2751 | if (!fl) | |
2752 | return -ENOMEM; | |
acfdf5c3 BF |
2753 | fl->fl_file = find_readable_file(fp); |
2754 | list_add(&dp->dl_perclnt, &dp->dl_client->cl_delegations); | |
2755 | status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); | |
edab9782 | 2756 | if (status) { |
acfdf5c3 | 2757 | list_del_init(&dp->dl_perclnt); |
edab9782 BF |
2758 | locks_free_lock(fl); |
2759 | return -ENOMEM; | |
2760 | } | |
acfdf5c3 BF |
2761 | fp->fi_lease = fl; |
2762 | fp->fi_deleg_file = fl->fl_file; | |
2763 | get_file(fp->fi_deleg_file); | |
2764 | atomic_set(&fp->fi_delegees, 1); | |
2765 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2766 | return 0; | |
2767 | } | |
2768 | ||
2769 | static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag) | |
2770 | { | |
2771 | struct nfs4_file *fp = dp->dl_file; | |
2772 | ||
2773 | if (!fp->fi_lease) | |
2774 | return nfs4_setlease(dp, flag); | |
2775 | spin_lock(&recall_lock); | |
2776 | if (fp->fi_had_conflict) { | |
2777 | spin_unlock(&recall_lock); | |
2778 | return -EAGAIN; | |
2779 | } | |
2780 | atomic_inc(&fp->fi_delegees); | |
2781 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2782 | spin_unlock(&recall_lock); | |
2783 | list_add(&dp->dl_perclnt, &dp->dl_client->cl_delegations); | |
edab9782 BF |
2784 | return 0; |
2785 | } | |
2786 | ||
1da177e4 LT |
2787 | /* |
2788 | * Attempt to hand out a delegation. | |
2789 | */ | |
2790 | static void | |
2791 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) | |
2792 | { | |
2793 | struct nfs4_delegation *dp; | |
2794 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
14a24e99 | 2795 | int cb_up; |
1da177e4 LT |
2796 | int status, flag = 0; |
2797 | ||
14a24e99 | 2798 | cb_up = nfsd4_cb_channel_good(sop->so_client); |
1da177e4 | 2799 | flag = NFS4_OPEN_DELEGATE_NONE; |
7b190fec N |
2800 | open->op_recall = 0; |
2801 | switch (open->op_claim_type) { | |
2802 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 2803 | if (!cb_up) |
7b190fec N |
2804 | open->op_recall = 1; |
2805 | flag = open->op_delegate_type; | |
2806 | if (flag == NFS4_OPEN_DELEGATE_NONE) | |
2807 | goto out; | |
2808 | break; | |
2809 | case NFS4_OPEN_CLAIM_NULL: | |
2810 | /* Let's not give out any delegations till everyone's | |
2811 | * had the chance to reclaim theirs.... */ | |
af558e33 | 2812 | if (locks_in_grace()) |
7b190fec | 2813 | goto out; |
2bf23875 | 2814 | if (!cb_up || !sop->so_confirmed) |
7b190fec N |
2815 | goto out; |
2816 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | |
2817 | flag = NFS4_OPEN_DELEGATE_WRITE; | |
2818 | else | |
2819 | flag = NFS4_OPEN_DELEGATE_READ; | |
2820 | break; | |
2821 | default: | |
2822 | goto out; | |
2823 | } | |
1da177e4 LT |
2824 | |
2825 | dp = alloc_init_deleg(sop->so_client, stp, fh, flag); | |
dd239cc0 BF |
2826 | if (dp == NULL) |
2827 | goto out_no_deleg; | |
acfdf5c3 | 2828 | status = nfs4_set_delegation(dp, flag); |
edab9782 | 2829 | if (status) |
dd239cc0 | 2830 | goto out_free; |
1da177e4 LT |
2831 | |
2832 | memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); | |
2833 | ||
8c10cbdb BH |
2834 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
2835 | STATEID_VAL(&dp->dl_stateid)); | |
1da177e4 | 2836 | out: |
7b190fec N |
2837 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS |
2838 | && flag == NFS4_OPEN_DELEGATE_NONE | |
2839 | && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) | |
2fdada03 | 2840 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
1da177e4 | 2841 | open->op_delegate_type = flag; |
dd239cc0 BF |
2842 | return; |
2843 | out_free: | |
acfdf5c3 | 2844 | nfs4_put_delegation(dp); |
dd239cc0 BF |
2845 | out_no_deleg: |
2846 | flag = NFS4_OPEN_DELEGATE_NONE; | |
2847 | goto out; | |
1da177e4 LT |
2848 | } |
2849 | ||
2850 | /* | |
2851 | * called with nfs4_lock_state() held. | |
2852 | */ | |
b37ad28b | 2853 | __be32 |
1da177e4 LT |
2854 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
2855 | { | |
6668958f | 2856 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
1da177e4 LT |
2857 | struct nfs4_file *fp = NULL; |
2858 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2859 | struct nfs4_stateid *stp = NULL; | |
567d9829 | 2860 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 2861 | __be32 status; |
1da177e4 LT |
2862 | |
2863 | status = nfserr_inval; | |
d87a8ade | 2864 | if (!access_valid(open->op_share_access, resp->cstate.minorversion) |
ba5a6a19 | 2865 | || !deny_valid(open->op_share_deny)) |
1da177e4 LT |
2866 | goto out; |
2867 | /* | |
2868 | * Lookup file; if found, lookup stateid and check open request, | |
2869 | * and check for delegations in the process of being recalled. | |
2870 | * If not found, create the nfs4_file struct | |
2871 | */ | |
2872 | fp = find_file(ino); | |
2873 | if (fp) { | |
2874 | if ((status = nfs4_check_open(fp, open, &stp))) | |
2875 | goto out; | |
c44c5eeb N |
2876 | status = nfs4_check_deleg(fp, open, &dp); |
2877 | if (status) | |
2878 | goto out; | |
1da177e4 | 2879 | } else { |
c44c5eeb N |
2880 | status = nfserr_bad_stateid; |
2881 | if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2882 | goto out; | |
3e772463 | 2883 | status = nfserr_jukebox; |
1da177e4 LT |
2884 | fp = alloc_init_file(ino); |
2885 | if (fp == NULL) | |
2886 | goto out; | |
2887 | } | |
2888 | ||
2889 | /* | |
2890 | * OPEN the file, or upgrade an existing OPEN. | |
2891 | * If truncate fails, the OPEN fails. | |
2892 | */ | |
2893 | if (stp) { | |
2894 | /* Stateid was found, this is an OPEN upgrade */ | |
f9d7562f | 2895 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
1da177e4 LT |
2896 | if (status) |
2897 | goto out; | |
2898 | } else { | |
f9d7562f | 2899 | status = nfs4_new_open(rqstp, &stp, fp, current_fh, open); |
567d9829 | 2900 | if (status) |
1da177e4 LT |
2901 | goto out; |
2902 | init_stateid(stp, fp, open); | |
2903 | status = nfsd4_truncate(rqstp, current_fh, open); | |
2904 | if (status) { | |
2283963f | 2905 | release_open_stateid(stp); |
1da177e4 LT |
2906 | goto out; |
2907 | } | |
2908 | } | |
73997dc4 | 2909 | update_stateid(&stp->st_stateid); |
1da177e4 LT |
2910 | memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); |
2911 | ||
4dc6ec00 | 2912 | if (nfsd4_has_session(&resp->cstate)) |
6668958f AA |
2913 | open->op_stateowner->so_confirmed = 1; |
2914 | ||
1da177e4 LT |
2915 | /* |
2916 | * Attempt to hand out a delegation. No error return, because the | |
2917 | * OPEN succeeds even if we fail. | |
2918 | */ | |
2919 | nfs4_open_delegation(current_fh, open, stp); | |
2920 | ||
2921 | status = nfs_ok; | |
2922 | ||
8c10cbdb BH |
2923 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
2924 | STATEID_VAL(&stp->st_stateid)); | |
1da177e4 | 2925 | out: |
13cd2184 N |
2926 | if (fp) |
2927 | put_nfs4_file(fp); | |
37515177 N |
2928 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
2929 | nfs4_set_claim_prev(open); | |
1da177e4 LT |
2930 | /* |
2931 | * To finish the open response, we just need to set the rflags. | |
2932 | */ | |
2933 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
6668958f AA |
2934 | if (!open->op_stateowner->so_confirmed && |
2935 | !nfsd4_has_session(&resp->cstate)) | |
1da177e4 LT |
2936 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
2937 | ||
2938 | return status; | |
2939 | } | |
2940 | ||
b37ad28b | 2941 | __be32 |
b591480b BF |
2942 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2943 | clientid_t *clid) | |
1da177e4 LT |
2944 | { |
2945 | struct nfs4_client *clp; | |
b37ad28b | 2946 | __be32 status; |
1da177e4 LT |
2947 | |
2948 | nfs4_lock_state(); | |
2949 | dprintk("process_renew(%08x/%08x): starting\n", | |
2950 | clid->cl_boot, clid->cl_id); | |
2951 | status = nfserr_stale_clientid; | |
2952 | if (STALE_CLIENTID(clid)) | |
2953 | goto out; | |
2954 | clp = find_confirmed_client(clid); | |
2955 | status = nfserr_expired; | |
2956 | if (clp == NULL) { | |
2957 | /* We assume the client took too long to RENEW. */ | |
2958 | dprintk("nfsd4_renew: clientid not found!\n"); | |
2959 | goto out; | |
2960 | } | |
2961 | renew_client(clp); | |
2962 | status = nfserr_cb_path_down; | |
ea1da636 | 2963 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 2964 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
2965 | goto out; |
2966 | status = nfs_ok; | |
2967 | out: | |
2968 | nfs4_unlock_state(); | |
2969 | return status; | |
2970 | } | |
2971 | ||
c47d832b | 2972 | static struct lock_manager nfsd4_manager = { |
af558e33 BF |
2973 | }; |
2974 | ||
a76b4319 | 2975 | static void |
af558e33 | 2976 | nfsd4_end_grace(void) |
a76b4319 N |
2977 | { |
2978 | dprintk("NFSD: end of grace period\n"); | |
c7b9a459 | 2979 | nfsd4_recdir_purge_old(); |
af558e33 | 2980 | locks_end_grace(&nfsd4_manager); |
e46b498c BF |
2981 | /* |
2982 | * Now that every NFSv4 client has had the chance to recover and | |
2983 | * to see the (possibly new, possibly shorter) lease time, we | |
2984 | * can safely set the next grace time to the current lease time: | |
2985 | */ | |
2986 | nfsd4_grace = nfsd4_lease; | |
a76b4319 N |
2987 | } |
2988 | ||
fd39ca9a | 2989 | static time_t |
1da177e4 LT |
2990 | nfs4_laundromat(void) |
2991 | { | |
2992 | struct nfs4_client *clp; | |
2993 | struct nfs4_stateowner *sop; | |
2994 | struct nfs4_delegation *dp; | |
2995 | struct list_head *pos, *next, reaplist; | |
cf07d2ea BF |
2996 | time_t cutoff = get_seconds() - nfsd4_lease; |
2997 | time_t t, clientid_val = nfsd4_lease; | |
2998 | time_t u, test_val = nfsd4_lease; | |
1da177e4 LT |
2999 | |
3000 | nfs4_lock_state(); | |
3001 | ||
3002 | dprintk("NFSD: laundromat service - starting\n"); | |
af558e33 BF |
3003 | if (locks_in_grace()) |
3004 | nfsd4_end_grace(); | |
36acb66b BH |
3005 | INIT_LIST_HEAD(&reaplist); |
3006 | spin_lock(&client_lock); | |
1da177e4 LT |
3007 | list_for_each_safe(pos, next, &client_lru) { |
3008 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
3009 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
3010 | t = clp->cl_time - cutoff; | |
3011 | if (clientid_val > t) | |
3012 | clientid_val = t; | |
3013 | break; | |
3014 | } | |
d7682988 BH |
3015 | if (atomic_read(&clp->cl_refcount)) { |
3016 | dprintk("NFSD: client in use (clientid %08x)\n", | |
3017 | clp->cl_clientid.cl_id); | |
3018 | continue; | |
3019 | } | |
3020 | unhash_client_locked(clp); | |
3021 | list_add(&clp->cl_lru, &reaplist); | |
36acb66b BH |
3022 | } |
3023 | spin_unlock(&client_lock); | |
3024 | list_for_each_safe(pos, next, &reaplist) { | |
3025 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
3026 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
3027 | clp->cl_clientid.cl_id); | |
c7b9a459 | 3028 | nfsd4_remove_clid_dir(clp); |
1da177e4 LT |
3029 | expire_client(clp); |
3030 | } | |
1da177e4 LT |
3031 | spin_lock(&recall_lock); |
3032 | list_for_each_safe(pos, next, &del_recall_lru) { | |
3033 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3034 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
3035 | u = dp->dl_time - cutoff; | |
3036 | if (test_val > u) | |
3037 | test_val = u; | |
3038 | break; | |
3039 | } | |
1da177e4 LT |
3040 | list_move(&dp->dl_recall_lru, &reaplist); |
3041 | } | |
3042 | spin_unlock(&recall_lock); | |
3043 | list_for_each_safe(pos, next, &reaplist) { | |
3044 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3045 | list_del_init(&dp->dl_recall_lru); | |
3046 | unhash_delegation(dp); | |
3047 | } | |
cf07d2ea | 3048 | test_val = nfsd4_lease; |
1da177e4 LT |
3049 | list_for_each_safe(pos, next, &close_lru) { |
3050 | sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); | |
3051 | if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { | |
3052 | u = sop->so_time - cutoff; | |
3053 | if (test_val > u) | |
3054 | test_val = u; | |
3055 | break; | |
3056 | } | |
3057 | dprintk("NFSD: purging unused open stateowner (so_id %d)\n", | |
3058 | sop->so_id); | |
f044ff83 | 3059 | release_openowner(sop); |
1da177e4 LT |
3060 | } |
3061 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
3062 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
3063 | nfs4_unlock_state(); | |
3064 | return clientid_val; | |
3065 | } | |
3066 | ||
a254b246 HH |
3067 | static struct workqueue_struct *laundry_wq; |
3068 | static void laundromat_main(struct work_struct *); | |
3069 | static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); | |
3070 | ||
3071 | static void | |
c4028958 | 3072 | laundromat_main(struct work_struct *not_used) |
1da177e4 LT |
3073 | { |
3074 | time_t t; | |
3075 | ||
3076 | t = nfs4_laundromat(); | |
3077 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); | |
58da282b | 3078 | queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); |
1da177e4 LT |
3079 | } |
3080 | ||
fd39ca9a | 3081 | static struct nfs4_stateowner * |
f8816512 N |
3082 | search_close_lru(u32 st_id, int flags) |
3083 | { | |
1da177e4 LT |
3084 | struct nfs4_stateowner *local = NULL; |
3085 | ||
1da177e4 LT |
3086 | if (flags & CLOSE_STATE) { |
3087 | list_for_each_entry(local, &close_lru, so_close_lru) { | |
3088 | if (local->so_id == st_id) | |
3089 | return local; | |
3090 | } | |
3091 | } | |
3092 | return NULL; | |
3093 | } | |
3094 | ||
3095 | static inline int | |
3096 | nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) | |
3097 | { | |
f9d7562f | 3098 | return fhp->fh_dentry->d_inode != stp->st_file->fi_inode; |
1da177e4 LT |
3099 | } |
3100 | ||
3101 | static int | |
3102 | STALE_STATEID(stateid_t *stateid) | |
3103 | { | |
e4e83ea4 BF |
3104 | if (stateid->si_boot == boot_time) |
3105 | return 0; | |
3106 | dprintk("NFSD: stale stateid " STATEID_FMT "!\n", | |
8c10cbdb | 3107 | STATEID_VAL(stateid)); |
e4e83ea4 | 3108 | return 1; |
1da177e4 LT |
3109 | } |
3110 | ||
3111 | static inline int | |
3112 | access_permit_read(unsigned long access_bmap) | |
3113 | { | |
3114 | return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || | |
3115 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || | |
3116 | test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); | |
3117 | } | |
3118 | ||
3119 | static inline int | |
3120 | access_permit_write(unsigned long access_bmap) | |
3121 | { | |
3122 | return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || | |
3123 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); | |
3124 | } | |
3125 | ||
3126 | static | |
b37ad28b | 3127 | __be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags) |
1da177e4 | 3128 | { |
b37ad28b | 3129 | __be32 status = nfserr_openmode; |
1da177e4 | 3130 | |
02921914 BF |
3131 | /* For lock stateid's, we test the parent open, not the lock: */ |
3132 | if (stp->st_openstp) | |
3133 | stp = stp->st_openstp; | |
1da177e4 LT |
3134 | if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) |
3135 | goto out; | |
3136 | if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) | |
3137 | goto out; | |
3138 | status = nfs_ok; | |
3139 | out: | |
3140 | return status; | |
3141 | } | |
3142 | ||
b37ad28b | 3143 | static inline __be32 |
1da177e4 LT |
3144 | check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) |
3145 | { | |
203a8c8e | 3146 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 3147 | return nfs_ok; |
af558e33 | 3148 | else if (locks_in_grace()) { |
25985edc | 3149 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
3150 | * conflicting state; so we must wait out the grace period. */ |
3151 | return nfserr_grace; | |
3152 | } else if (flags & WR_STATE) | |
3153 | return nfs4_share_conflict(current_fh, | |
3154 | NFS4_SHARE_DENY_WRITE); | |
3155 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
3156 | return nfs4_share_conflict(current_fh, | |
3157 | NFS4_SHARE_DENY_READ); | |
3158 | } | |
3159 | ||
3160 | /* | |
3161 | * Allow READ/WRITE during grace period on recovered state only for files | |
3162 | * that are not able to provide mandatory locking. | |
3163 | */ | |
3164 | static inline int | |
18f82731 | 3165 | grace_disallows_io(struct inode *inode) |
1da177e4 | 3166 | { |
203a8c8e | 3167 | return locks_in_grace() && mandatory_lock(inode); |
1da177e4 LT |
3168 | } |
3169 | ||
81b82965 BF |
3170 | /* Returns true iff a is later than b: */ |
3171 | static bool stateid_generation_after(stateid_t *a, stateid_t *b) | |
3172 | { | |
3173 | return (s32)a->si_generation - (s32)b->si_generation > 0; | |
3174 | } | |
3175 | ||
28dde241 | 3176 | static int check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 3177 | { |
6668958f AA |
3178 | /* |
3179 | * When sessions are used the stateid generation number is ignored | |
3180 | * when it is zero. | |
3181 | */ | |
28dde241 | 3182 | if (has_session && in->si_generation == 0) |
81b82965 BF |
3183 | return nfs_ok; |
3184 | ||
3185 | if (in->si_generation == ref->si_generation) | |
3186 | return nfs_ok; | |
6668958f | 3187 | |
0836f587 | 3188 | /* If the client sends us a stateid from the future, it's buggy: */ |
81b82965 | 3189 | if (stateid_generation_after(in, ref)) |
0836f587 BF |
3190 | return nfserr_bad_stateid; |
3191 | /* | |
81b82965 BF |
3192 | * However, we could see a stateid from the past, even from a |
3193 | * non-buggy client. For example, if the client sends a lock | |
3194 | * while some IO is outstanding, the lock may bump si_generation | |
3195 | * while the IO is still in flight. The client could avoid that | |
3196 | * situation by waiting for responses on all the IO requests, | |
3197 | * but better performance may result in retrying IO that | |
3198 | * receives an old_stateid error if requests are rarely | |
3199 | * reordered in flight: | |
0836f587 | 3200 | */ |
81b82965 | 3201 | return nfserr_old_stateid; |
0836f587 BF |
3202 | } |
3203 | ||
3e633079 BF |
3204 | static int is_delegation_stateid(stateid_t *stateid) |
3205 | { | |
3206 | return stateid->si_fileid == 0; | |
3207 | } | |
3208 | ||
28dde241 | 3209 | __be32 nfs4_validate_stateid(stateid_t *stateid, bool has_session) |
17456804 BS |
3210 | { |
3211 | struct nfs4_stateid *stp = NULL; | |
3212 | __be32 status = nfserr_stale_stateid; | |
3213 | ||
3214 | if (STALE_STATEID(stateid)) | |
3215 | goto out; | |
3216 | ||
3217 | status = nfserr_expired; | |
b79abadd | 3218 | stp = find_stateid(stateid, 0); |
17456804 BS |
3219 | if (!stp) |
3220 | goto out; | |
3221 | status = nfserr_bad_stateid; | |
3222 | ||
3223 | if (!stp->st_stateowner->so_confirmed) | |
3224 | goto out; | |
3225 | ||
28dde241 | 3226 | status = check_stateid_generation(stateid, &stp->st_stateid, has_session); |
17456804 BS |
3227 | if (status) |
3228 | goto out; | |
3229 | ||
3230 | status = nfs_ok; | |
3231 | out: | |
3232 | return status; | |
3233 | } | |
3234 | ||
1da177e4 LT |
3235 | /* |
3236 | * Checks for stateid operations | |
3237 | */ | |
b37ad28b | 3238 | __be32 |
dd453dfd BH |
3239 | nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, |
3240 | stateid_t *stateid, int flags, struct file **filpp) | |
1da177e4 LT |
3241 | { |
3242 | struct nfs4_stateid *stp = NULL; | |
3243 | struct nfs4_delegation *dp = NULL; | |
dd453dfd | 3244 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 3245 | struct inode *ino = current_fh->fh_dentry->d_inode; |
b37ad28b | 3246 | __be32 status; |
1da177e4 | 3247 | |
1da177e4 LT |
3248 | if (filpp) |
3249 | *filpp = NULL; | |
3250 | ||
18f82731 | 3251 | if (grace_disallows_io(ino)) |
1da177e4 LT |
3252 | return nfserr_grace; |
3253 | ||
3254 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3255 | return check_special_stateids(current_fh, stateid, flags); | |
3256 | ||
1da177e4 LT |
3257 | status = nfserr_stale_stateid; |
3258 | if (STALE_STATEID(stateid)) | |
3259 | goto out; | |
3260 | ||
33515142 BF |
3261 | /* |
3262 | * We assume that any stateid that has the current boot time, | |
3263 | * but that we can't find, is expired: | |
3264 | */ | |
3265 | status = nfserr_expired; | |
3e633079 | 3266 | if (is_delegation_stateid(stateid)) { |
a4455be0 | 3267 | dp = find_delegation_stateid(ino, stateid); |
e4e83ea4 | 3268 | if (!dp) |
1da177e4 | 3269 | goto out; |
28dde241 | 3270 | status = check_stateid_generation(stateid, &dp->dl_stateid, nfsd4_has_session(cstate)); |
0c2a498f BF |
3271 | if (status) |
3272 | goto out; | |
dc9bf700 BF |
3273 | status = nfs4_check_delegmode(dp, flags); |
3274 | if (status) | |
3275 | goto out; | |
3276 | renew_client(dp->dl_client); | |
43b0178e | 3277 | if (filpp) { |
acfdf5c3 | 3278 | *filpp = dp->dl_file->fi_deleg_file; |
43b0178e DC |
3279 | BUG_ON(!*filpp); |
3280 | } | |
1da177e4 | 3281 | } else { /* open or lock stateid */ |
a4455be0 | 3282 | stp = find_stateid(stateid, flags); |
e4e83ea4 | 3283 | if (!stp) |
1da177e4 | 3284 | goto out; |
33515142 | 3285 | status = nfserr_bad_stateid; |
6150ef0d | 3286 | if (nfs4_check_fh(current_fh, stp)) |
1da177e4 LT |
3287 | goto out; |
3288 | if (!stp->st_stateowner->so_confirmed) | |
3289 | goto out; | |
6668958f | 3290 | status = check_stateid_generation(stateid, &stp->st_stateid, |
28dde241 | 3291 | nfsd4_has_session(cstate)); |
0c2a498f BF |
3292 | if (status) |
3293 | goto out; | |
a4455be0 BF |
3294 | status = nfs4_check_openmode(stp, flags); |
3295 | if (status) | |
1da177e4 LT |
3296 | goto out; |
3297 | renew_client(stp->st_stateowner->so_client); | |
f9d7562f BF |
3298 | if (filpp) { |
3299 | if (flags & RD_STATE) | |
3300 | *filpp = find_readable_file(stp->st_file); | |
3301 | else | |
3302 | *filpp = find_writeable_file(stp->st_file); | |
f9d7562f | 3303 | } |
1da177e4 LT |
3304 | } |
3305 | status = nfs_ok; | |
3306 | out: | |
3307 | return status; | |
3308 | } | |
3309 | ||
e1ca12df BS |
3310 | static __be32 |
3311 | nfsd4_free_delegation_stateid(stateid_t *stateid) | |
3312 | { | |
3313 | struct nfs4_delegation *dp = search_for_delegation(stateid); | |
3314 | if (dp) | |
3315 | return nfserr_locks_held; | |
3316 | return nfserr_bad_stateid; | |
3317 | } | |
3318 | ||
3319 | static __be32 | |
3320 | nfsd4_free_lock_stateid(struct nfs4_stateid *stp) | |
3321 | { | |
3322 | if (check_for_locks(stp->st_file, stp->st_stateowner)) | |
3323 | return nfserr_locks_held; | |
3324 | release_lock_stateid(stp); | |
3325 | return nfs_ok; | |
3326 | } | |
3327 | ||
17456804 BS |
3328 | /* |
3329 | * Test if the stateid is valid | |
3330 | */ | |
3331 | __be32 | |
3332 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3333 | struct nfsd4_test_stateid *test_stateid) | |
3334 | { | |
3335 | test_stateid->ts_has_session = nfsd4_has_session(cstate); | |
3336 | return nfs_ok; | |
3337 | } | |
3338 | ||
e1ca12df BS |
3339 | /* |
3340 | * Free a state id | |
3341 | */ | |
3342 | __be32 | |
3343 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3344 | struct nfsd4_free_stateid *free_stateid) | |
3345 | { | |
3346 | stateid_t *stateid = &free_stateid->fr_stateid; | |
3347 | struct nfs4_stateid *stp; | |
3348 | __be32 ret; | |
3349 | ||
3350 | nfs4_lock_state(); | |
3351 | if (is_delegation_stateid(stateid)) { | |
3352 | ret = nfsd4_free_delegation_stateid(stateid); | |
3353 | goto out; | |
3354 | } | |
3355 | ||
b79abadd | 3356 | stp = find_stateid(stateid, 0); |
e1ca12df BS |
3357 | if (!stp) { |
3358 | ret = nfserr_bad_stateid; | |
3359 | goto out; | |
3360 | } | |
81b82965 BF |
3361 | ret = check_stateid_generation(stateid, &stp->st_stateid, 1); |
3362 | if (ret) | |
3363 | goto out; | |
e1ca12df | 3364 | |
5fa0bbb4 | 3365 | if (stp->st_type == NFS4_OPEN_STID) { |
e1ca12df BS |
3366 | ret = nfserr_locks_held; |
3367 | goto out; | |
3368 | } else { | |
3369 | ret = nfsd4_free_lock_stateid(stp); | |
3370 | goto out; | |
3371 | } | |
3372 | ||
3373 | out: | |
3374 | nfs4_unlock_state(); | |
3375 | return ret; | |
3376 | } | |
3377 | ||
4c4cd222 N |
3378 | static inline int |
3379 | setlkflg (int type) | |
3380 | { | |
3381 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
3382 | RD_STATE : WR_STATE; | |
3383 | } | |
1da177e4 LT |
3384 | |
3385 | /* | |
3386 | * Checks for sequence id mutating operations. | |
3387 | */ | |
b37ad28b | 3388 | static __be32 |
dd453dfd BH |
3389 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
3390 | stateid_t *stateid, int flags, | |
3391 | struct nfs4_stateowner **sopp, | |
b34f27aa | 3392 | struct nfs4_stateid **stpp) |
1da177e4 | 3393 | { |
1da177e4 LT |
3394 | struct nfs4_stateid *stp; |
3395 | struct nfs4_stateowner *sop; | |
dd453dfd | 3396 | struct svc_fh *current_fh = &cstate->current_fh; |
0836f587 | 3397 | __be32 status; |
1da177e4 | 3398 | |
8c10cbdb BH |
3399 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
3400 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 3401 | |
1da177e4 LT |
3402 | *stpp = NULL; |
3403 | *sopp = NULL; | |
3404 | ||
1da177e4 | 3405 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { |
2fdada03 | 3406 | dprintk("NFSD: preprocess_seqid_op: magic stateid!\n"); |
3a4f98bb | 3407 | return nfserr_bad_stateid; |
1da177e4 LT |
3408 | } |
3409 | ||
1da177e4 | 3410 | if (STALE_STATEID(stateid)) |
3a4f98bb | 3411 | return nfserr_stale_stateid; |
6668958f | 3412 | |
1da177e4 LT |
3413 | /* |
3414 | * We return BAD_STATEID if filehandle doesn't match stateid, | |
3415 | * the confirmed flag is incorrecly set, or the generation | |
3416 | * number is incorrect. | |
1da177e4 | 3417 | */ |
f8816512 N |
3418 | stp = find_stateid(stateid, flags); |
3419 | if (stp == NULL) { | |
3420 | /* | |
3421 | * Also, we should make sure this isn't just the result of | |
3422 | * a replayed close: | |
3423 | */ | |
3424 | sop = search_close_lru(stateid->si_stateownerid, flags); | |
33515142 | 3425 | /* It's not stale; let's assume it's expired: */ |
f8816512 | 3426 | if (sop == NULL) |
33515142 | 3427 | return nfserr_expired; |
f3e42237 BF |
3428 | nfs4_get_stateowner(sop); |
3429 | cstate->replay_owner = sop; | |
f8816512 N |
3430 | goto check_replay; |
3431 | } | |
1da177e4 | 3432 | |
39325bd0 BF |
3433 | *stpp = stp; |
3434 | *sopp = sop = stp->st_stateowner; | |
f3e42237 BF |
3435 | nfs4_get_stateowner(sop); |
3436 | cstate->replay_owner = sop; | |
39325bd0 | 3437 | |
f3362737 | 3438 | if (nfs4_check_fh(current_fh, stp)) { |
2fdada03 | 3439 | dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); |
3a4f98bb | 3440 | return nfserr_bad_stateid; |
1da177e4 LT |
3441 | } |
3442 | ||
28dde241 | 3443 | if (!nfsd4_has_session(cstate) && seqid != sop->so_seqid) |
1da177e4 LT |
3444 | goto check_replay; |
3445 | ||
3a4f98bb | 3446 | if (sop->so_confirmed && flags & CONFIRM) { |
2fdada03 | 3447 | dprintk("NFSD: preprocess_seqid_op: expected" |
3a4f98bb N |
3448 | " unconfirmed stateowner!\n"); |
3449 | return nfserr_bad_stateid; | |
1da177e4 | 3450 | } |
3a4f98bb | 3451 | if (!sop->so_confirmed && !(flags & CONFIRM)) { |
2fdada03 | 3452 | dprintk("NFSD: preprocess_seqid_op: stateowner not" |
3a4f98bb N |
3453 | " confirmed yet!\n"); |
3454 | return nfserr_bad_stateid; | |
1da177e4 | 3455 | } |
28dde241 | 3456 | status = check_stateid_generation(stateid, &stp->st_stateid, nfsd4_has_session(cstate)); |
0836f587 BF |
3457 | if (status) |
3458 | return status; | |
52fd004e | 3459 | renew_client(sop->so_client); |
3a4f98bb | 3460 | return nfs_ok; |
1da177e4 | 3461 | |
1da177e4 | 3462 | check_replay: |
bd9aac52 | 3463 | if (seqid == sop->so_seqid - 1) { |
849823c5 | 3464 | dprintk("NFSD: preprocess_seqid_op: retransmission?\n"); |
1da177e4 | 3465 | /* indicate replay to calling function */ |
a90b061c | 3466 | return nfserr_replay_me; |
1da177e4 | 3467 | } |
2fdada03 | 3468 | dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n", |
3a4f98bb N |
3469 | sop->so_seqid, seqid); |
3470 | *sopp = NULL; | |
3471 | return nfserr_bad_seqid; | |
1da177e4 LT |
3472 | } |
3473 | ||
b37ad28b | 3474 | __be32 |
ca364317 | 3475 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3476 | struct nfsd4_open_confirm *oc) |
1da177e4 | 3477 | { |
b37ad28b | 3478 | __be32 status; |
1da177e4 LT |
3479 | struct nfs4_stateowner *sop; |
3480 | struct nfs4_stateid *stp; | |
3481 | ||
3482 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | |
ca364317 BF |
3483 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3484 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3485 | |
ca364317 | 3486 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
3487 | if (status) |
3488 | return status; | |
1da177e4 LT |
3489 | |
3490 | nfs4_lock_state(); | |
3491 | ||
dd453dfd | 3492 | if ((status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3493 | oc->oc_seqid, &oc->oc_req_stateid, |
f3362737 | 3494 | CONFIRM | OPEN_STATE, |
b34f27aa | 3495 | &oc->oc_stateowner, &stp))) |
1da177e4 LT |
3496 | goto out; |
3497 | ||
3498 | sop = oc->oc_stateowner; | |
3499 | sop->so_confirmed = 1; | |
3500 | update_stateid(&stp->st_stateid); | |
3501 | memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
8c10cbdb BH |
3502 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
3503 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stateid)); | |
c7b9a459 N |
3504 | |
3505 | nfsd4_create_clid_dir(sop->so_client); | |
1da177e4 | 3506 | out: |
1da177e4 LT |
3507 | nfs4_unlock_state(); |
3508 | return status; | |
3509 | } | |
3510 | ||
f197c271 | 3511 | static inline void nfs4_file_downgrade(struct nfs4_stateid *stp, unsigned int to_access) |
1da177e4 LT |
3512 | { |
3513 | int i; | |
f197c271 | 3514 | |
1da177e4 | 3515 | for (i = 1; i < 4; i++) { |
f197c271 BF |
3516 | if (test_bit(i, &stp->st_access_bmap) && !(i & to_access)) { |
3517 | nfs4_file_put_access(stp->st_file, i); | |
3518 | __clear_bit(i, &stp->st_access_bmap); | |
3519 | } | |
1da177e4 LT |
3520 | } |
3521 | } | |
3522 | ||
3523 | static void | |
3524 | reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) | |
3525 | { | |
3526 | int i; | |
3527 | for (i = 0; i < 4; i++) { | |
3528 | if ((i & deny) != i) | |
3529 | __clear_bit(i, bmap); | |
3530 | } | |
3531 | } | |
3532 | ||
b37ad28b | 3533 | __be32 |
ca364317 BF |
3534 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
3535 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 3536 | struct nfsd4_open_downgrade *od) |
1da177e4 | 3537 | { |
b37ad28b | 3538 | __be32 status; |
1da177e4 | 3539 | struct nfs4_stateid *stp; |
1da177e4 LT |
3540 | |
3541 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | |
ca364317 BF |
3542 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3543 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3544 | |
d87a8ade | 3545 | if (!access_valid(od->od_share_access, cstate->minorversion) |
ba5a6a19 | 3546 | || !deny_valid(od->od_share_deny)) |
1da177e4 LT |
3547 | return nfserr_inval; |
3548 | ||
3549 | nfs4_lock_state(); | |
dd453dfd | 3550 | if ((status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3551 | od->od_seqid, |
1da177e4 | 3552 | &od->od_stateid, |
f3362737 | 3553 | OPEN_STATE, |
b34f27aa | 3554 | &od->od_stateowner, &stp))) |
1da177e4 LT |
3555 | goto out; |
3556 | ||
3557 | status = nfserr_inval; | |
3558 | if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { | |
3559 | dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
3560 | stp->st_access_bmap, od->od_share_access); | |
3561 | goto out; | |
3562 | } | |
3563 | if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { | |
3564 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", | |
3565 | stp->st_deny_bmap, od->od_share_deny); | |
3566 | goto out; | |
3567 | } | |
f197c271 | 3568 | nfs4_file_downgrade(stp, od->od_share_access); |
1da177e4 | 3569 | |
1da177e4 LT |
3570 | reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); |
3571 | ||
3572 | update_stateid(&stp->st_stateid); | |
3573 | memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
3574 | status = nfs_ok; | |
3575 | out: | |
1da177e4 LT |
3576 | nfs4_unlock_state(); |
3577 | return status; | |
3578 | } | |
3579 | ||
3580 | /* | |
3581 | * nfs4_unlock_state() called after encode | |
3582 | */ | |
b37ad28b | 3583 | __be32 |
ca364317 | 3584 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3585 | struct nfsd4_close *close) |
1da177e4 | 3586 | { |
b37ad28b | 3587 | __be32 status; |
1da177e4 LT |
3588 | struct nfs4_stateid *stp; |
3589 | ||
3590 | dprintk("NFSD: nfsd4_close on file %.*s\n", | |
ca364317 BF |
3591 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3592 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 LT |
3593 | |
3594 | nfs4_lock_state(); | |
3595 | /* check close_lru for replay */ | |
dd453dfd | 3596 | if ((status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3597 | close->cl_seqid, |
1da177e4 | 3598 | &close->cl_stateid, |
f3362737 | 3599 | OPEN_STATE | CLOSE_STATE, |
b34f27aa | 3600 | &close->cl_stateowner, &stp))) |
1da177e4 | 3601 | goto out; |
1da177e4 LT |
3602 | status = nfs_ok; |
3603 | update_stateid(&stp->st_stateid); | |
3604 | memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
3605 | ||
04ef5954 | 3606 | /* release_stateid() calls nfsd_close() if needed */ |
2283963f | 3607 | release_open_stateid(stp); |
04ef5954 BF |
3608 | |
3609 | /* place unused nfs4_stateowners on so_close_lru list to be | |
3610 | * released by the laundromat service after the lease period | |
3611 | * to enable us to handle CLOSE replay | |
3612 | */ | |
3613 | if (list_empty(&close->cl_stateowner->so_stateids)) | |
3614 | move_to_close_lru(close->cl_stateowner); | |
1da177e4 | 3615 | out: |
1da177e4 LT |
3616 | nfs4_unlock_state(); |
3617 | return status; | |
3618 | } | |
3619 | ||
b37ad28b | 3620 | __be32 |
ca364317 BF |
3621 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3622 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 3623 | { |
203a8c8e BF |
3624 | struct nfs4_delegation *dp; |
3625 | stateid_t *stateid = &dr->dr_stateid; | |
3626 | struct inode *inode; | |
b37ad28b | 3627 | __be32 status; |
1da177e4 | 3628 | |
ca364317 | 3629 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e BF |
3630 | return status; |
3631 | inode = cstate->current_fh.fh_dentry->d_inode; | |
1da177e4 LT |
3632 | |
3633 | nfs4_lock_state(); | |
203a8c8e BF |
3634 | status = nfserr_bad_stateid; |
3635 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3636 | goto out; | |
3637 | status = nfserr_stale_stateid; | |
3638 | if (STALE_STATEID(stateid)) | |
3639 | goto out; | |
7e0f7cf5 | 3640 | status = nfserr_bad_stateid; |
203a8c8e BF |
3641 | if (!is_delegation_stateid(stateid)) |
3642 | goto out; | |
33515142 | 3643 | status = nfserr_expired; |
203a8c8e | 3644 | dp = find_delegation_stateid(inode, stateid); |
e4e83ea4 | 3645 | if (!dp) |
203a8c8e | 3646 | goto out; |
28dde241 | 3647 | status = check_stateid_generation(stateid, &dp->dl_stateid, nfsd4_has_session(cstate)); |
203a8c8e BF |
3648 | if (status) |
3649 | goto out; | |
3650 | renew_client(dp->dl_client); | |
3651 | ||
3652 | unhash_delegation(dp); | |
1da177e4 | 3653 | out: |
203a8c8e BF |
3654 | nfs4_unlock_state(); |
3655 | ||
1da177e4 LT |
3656 | return status; |
3657 | } | |
3658 | ||
3659 | ||
3660 | /* | |
3661 | * Lock owner state (byte-range locks) | |
3662 | */ | |
3663 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) | |
3664 | #define LOCK_HASH_BITS 8 | |
3665 | #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) | |
3666 | #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) | |
3667 | ||
87df4de8 BH |
3668 | static inline u64 |
3669 | end_offset(u64 start, u64 len) | |
3670 | { | |
3671 | u64 end; | |
3672 | ||
3673 | end = start + len; | |
3674 | return end >= start ? end: NFS4_MAX_UINT64; | |
3675 | } | |
3676 | ||
3677 | /* last octet in a range */ | |
3678 | static inline u64 | |
3679 | last_byte_offset(u64 start, u64 len) | |
3680 | { | |
3681 | u64 end; | |
3682 | ||
3683 | BUG_ON(!len); | |
3684 | end = start + len; | |
3685 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
3686 | } | |
3687 | ||
ddc04c41 BF |
3688 | static unsigned int lockownerid_hashval(u32 id) |
3689 | { | |
3690 | return id & LOCK_HASH_MASK; | |
3691 | } | |
1da177e4 LT |
3692 | |
3693 | static inline unsigned int | |
3694 | lock_ownerstr_hashval(struct inode *inode, u32 cl_id, | |
3695 | struct xdr_netobj *ownername) | |
3696 | { | |
3697 | return (file_hashval(inode) + cl_id | |
3698 | + opaque_hashval(ownername->data, ownername->len)) | |
3699 | & LOCK_HASH_MASK; | |
3700 | } | |
3701 | ||
3702 | static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; | |
3703 | static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; | |
1da177e4 | 3704 | |
e1ca12df BS |
3705 | static int |
3706 | same_stateid(stateid_t *id_one, stateid_t *id_two) | |
3707 | { | |
3708 | if (id_one->si_stateownerid != id_two->si_stateownerid) | |
3709 | return 0; | |
3710 | return id_one->si_fileid == id_two->si_fileid; | |
3711 | } | |
3712 | ||
b79abadd | 3713 | static struct nfs4_stateid *find_stateid(stateid_t *t, int flags) |
1da177e4 | 3714 | { |
b79abadd | 3715 | struct nfs4_stateid *s; |
1da177e4 LT |
3716 | unsigned int hashval; |
3717 | ||
b79abadd BF |
3718 | hashval = stateid_hashval(t->si_stateownerid, t->si_fileid); |
3719 | list_for_each_entry(s, &stateid_hashtbl[hashval], st_hash) { | |
3720 | if (!same_stateid(&s->st_stateid, t)) | |
3721 | continue; | |
3722 | if (flags & LOCK_STATE && s->st_type != NFS4_LOCK_STID) | |
3723 | return NULL; | |
3724 | if (flags & OPEN_STATE && s->st_type != NFS4_OPEN_STID) | |
3725 | return NULL; | |
3726 | return s; | |
1da177e4 | 3727 | } |
e1ca12df BS |
3728 | return NULL; |
3729 | } | |
3730 | ||
3731 | static struct nfs4_delegation * | |
3732 | search_for_delegation(stateid_t *stid) | |
3733 | { | |
3734 | struct nfs4_file *fp; | |
3735 | struct nfs4_delegation *dp; | |
3736 | struct list_head *pos; | |
3737 | int i; | |
3738 | ||
3739 | for (i = 0; i < FILE_HASH_SIZE; i++) { | |
3740 | list_for_each_entry(fp, &file_hashtbl[i], fi_hash) { | |
3741 | list_for_each(pos, &fp->fi_delegations) { | |
3742 | dp = list_entry(pos, struct nfs4_delegation, dl_perfile); | |
3743 | if (same_stateid(&dp->dl_stateid, stid)) | |
3744 | return dp; | |
3745 | } | |
3746 | } | |
3747 | } | |
3748 | return NULL; | |
3749 | } | |
3750 | ||
1da177e4 LT |
3751 | static struct nfs4_delegation * |
3752 | find_delegation_stateid(struct inode *ino, stateid_t *stid) | |
3753 | { | |
13cd2184 N |
3754 | struct nfs4_file *fp; |
3755 | struct nfs4_delegation *dl; | |
1da177e4 | 3756 | |
8c10cbdb BH |
3757 | dprintk("NFSD: %s: stateid=" STATEID_FMT "\n", __func__, |
3758 | STATEID_VAL(stid)); | |
1da177e4 | 3759 | |
1da177e4 | 3760 | fp = find_file(ino); |
13cd2184 N |
3761 | if (!fp) |
3762 | return NULL; | |
3763 | dl = find_delegation_file(fp, stid); | |
3764 | put_nfs4_file(fp); | |
3765 | return dl; | |
1da177e4 LT |
3766 | } |
3767 | ||
3768 | /* | |
3769 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
3770 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
3771 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
3772 | * locking, this prevents us from being completely protocol-compliant. The | |
3773 | * real solution to this problem is to start using unsigned file offsets in | |
3774 | * the VFS, but this is a very deep change! | |
3775 | */ | |
3776 | static inline void | |
3777 | nfs4_transform_lock_offset(struct file_lock *lock) | |
3778 | { | |
3779 | if (lock->fl_start < 0) | |
3780 | lock->fl_start = OFFSET_MAX; | |
3781 | if (lock->fl_end < 0) | |
3782 | lock->fl_end = OFFSET_MAX; | |
3783 | } | |
3784 | ||
d5b9026a N |
3785 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
3786 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 3787 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 3788 | }; |
1da177e4 LT |
3789 | |
3790 | static inline void | |
3791 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
3792 | { | |
d5b9026a | 3793 | struct nfs4_stateowner *sop; |
1da177e4 | 3794 | |
d5b9026a N |
3795 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
3796 | sop = (struct nfs4_stateowner *) fl->fl_owner; | |
1da177e4 LT |
3797 | kref_get(&sop->so_ref); |
3798 | deny->ld_sop = sop; | |
3799 | deny->ld_clientid = sop->so_client->cl_clientid; | |
d5b9026a N |
3800 | } else { |
3801 | deny->ld_sop = NULL; | |
3802 | deny->ld_clientid.cl_boot = 0; | |
3803 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
3804 | } |
3805 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
3806 | deny->ld_length = NFS4_MAX_UINT64; |
3807 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
3808 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
3809 | deny->ld_type = NFS4_READ_LT; | |
3810 | if (fl->fl_type != F_RDLCK) | |
3811 | deny->ld_type = NFS4_WRITE_LT; | |
3812 | } | |
3813 | ||
1da177e4 LT |
3814 | static struct nfs4_stateowner * |
3815 | find_lockstateowner_str(struct inode *inode, clientid_t *clid, | |
3816 | struct xdr_netobj *owner) | |
3817 | { | |
3818 | unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); | |
3819 | struct nfs4_stateowner *op; | |
3820 | ||
3821 | list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { | |
599e0a22 | 3822 | if (same_owner_str(op, owner, clid)) |
1da177e4 LT |
3823 | return op; |
3824 | } | |
3825 | return NULL; | |
3826 | } | |
3827 | ||
ff194bd9 BF |
3828 | static void hash_lockowner(struct nfs4_stateowner *sop, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp) |
3829 | { | |
3830 | unsigned int idhashval; | |
3831 | ||
3832 | idhashval = lockownerid_hashval(sop->so_id); | |
3833 | list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); | |
3834 | list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); | |
3835 | list_add(&sop->so_perstateid, &open_stp->st_lockowners); | |
3836 | } | |
3837 | ||
1da177e4 LT |
3838 | /* |
3839 | * Alloc a lock owner structure. | |
3840 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 3841 | * occurred. |
1da177e4 LT |
3842 | * |
3843 | * strhashval = lock_ownerstr_hashval | |
1da177e4 LT |
3844 | */ |
3845 | ||
3846 | static struct nfs4_stateowner * | |
3847 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { | |
3848 | struct nfs4_stateowner *sop; | |
1da177e4 | 3849 | |
ff194bd9 BF |
3850 | sop = alloc_stateowner(&lock->lk_new_owner, clp); |
3851 | if (!sop) | |
1da177e4 | 3852 | return NULL; |
ea1da636 | 3853 | INIT_LIST_HEAD(&sop->so_stateids); |
1da177e4 | 3854 | sop->so_is_open_owner = 0; |
b59e3c0e NB |
3855 | /* It is the openowner seqid that will be incremented in encode in the |
3856 | * case of new lockowners; so increment the lock seqid manually: */ | |
3857 | sop->so_seqid = lock->lk_new_lock_seqid + 1; | |
1da177e4 | 3858 | sop->so_confirmed = 1; |
ff194bd9 | 3859 | hash_lockowner(sop, strhashval, clp, open_stp); |
1da177e4 LT |
3860 | return sop; |
3861 | } | |
3862 | ||
fd39ca9a | 3863 | static struct nfs4_stateid * |
1da177e4 LT |
3864 | alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) |
3865 | { | |
3866 | struct nfs4_stateid *stp; | |
3867 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); | |
3868 | ||
5ac049ac N |
3869 | stp = nfs4_alloc_stateid(); |
3870 | if (stp == NULL) | |
1da177e4 LT |
3871 | goto out; |
3872 | INIT_LIST_HEAD(&stp->st_hash); | |
3873 | INIT_LIST_HEAD(&stp->st_perfile); | |
ea1da636 N |
3874 | INIT_LIST_HEAD(&stp->st_perstateowner); |
3875 | INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ | |
b79abadd | 3876 | list_add(&stp->st_hash, &stateid_hashtbl[hashval]); |
8beefa24 | 3877 | list_add(&stp->st_perfile, &fp->fi_stateids); |
ea1da636 | 3878 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
1da177e4 | 3879 | stp->st_stateowner = sop; |
5fa0bbb4 | 3880 | stp->st_type = NFS4_LOCK_STID; |
13cd2184 | 3881 | get_nfs4_file(fp); |
1da177e4 | 3882 | stp->st_file = fp; |
e4e83ea4 | 3883 | stp->st_stateid.si_boot = boot_time; |
1da177e4 LT |
3884 | stp->st_stateid.si_stateownerid = sop->so_id; |
3885 | stp->st_stateid.si_fileid = fp->fi_id; | |
73997dc4 | 3886 | /* note will be incremented before first return to client: */ |
1da177e4 | 3887 | stp->st_stateid.si_generation = 0; |
0997b173 | 3888 | stp->st_access_bmap = 0; |
1da177e4 | 3889 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 3890 | stp->st_openstp = open_stp; |
1da177e4 LT |
3891 | |
3892 | out: | |
3893 | return stp; | |
3894 | } | |
3895 | ||
fd39ca9a | 3896 | static int |
1da177e4 LT |
3897 | check_lock_length(u64 offset, u64 length) |
3898 | { | |
87df4de8 | 3899 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
3900 | LOFF_OVERFLOW(offset, length))); |
3901 | } | |
3902 | ||
0997b173 BF |
3903 | static void get_lock_access(struct nfs4_stateid *lock_stp, u32 access) |
3904 | { | |
3905 | struct nfs4_file *fp = lock_stp->st_file; | |
3906 | int oflag = nfs4_access_to_omode(access); | |
3907 | ||
3908 | if (test_bit(access, &lock_stp->st_access_bmap)) | |
3909 | return; | |
3910 | nfs4_file_get_access(fp, oflag); | |
3911 | __set_bit(access, &lock_stp->st_access_bmap); | |
3912 | } | |
3913 | ||
1da177e4 LT |
3914 | /* |
3915 | * LOCK operation | |
3916 | */ | |
b37ad28b | 3917 | __be32 |
ca364317 | 3918 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3919 | struct nfsd4_lock *lock) |
1da177e4 | 3920 | { |
3e9e3dbe | 3921 | struct nfs4_stateowner *open_sop = NULL; |
b59e3c0e | 3922 | struct nfs4_stateowner *lock_sop = NULL; |
1da177e4 | 3923 | struct nfs4_stateid *lock_stp; |
7d947842 BF |
3924 | struct nfs4_file *fp; |
3925 | struct file *filp = NULL; | |
1da177e4 | 3926 | struct file_lock file_lock; |
8dc7c311 | 3927 | struct file_lock conflock; |
b37ad28b | 3928 | __be32 status = 0; |
1da177e4 | 3929 | unsigned int strhashval; |
b34f27aa | 3930 | int lkflg; |
b8dd7b9a | 3931 | int err; |
1da177e4 LT |
3932 | |
3933 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
3934 | (long long) lock->lk_offset, | |
3935 | (long long) lock->lk_length); | |
3936 | ||
1da177e4 LT |
3937 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
3938 | return nfserr_inval; | |
3939 | ||
ca364317 | 3940 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 3941 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
3942 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
3943 | return status; | |
3944 | } | |
3945 | ||
1da177e4 LT |
3946 | nfs4_lock_state(); |
3947 | ||
3948 | if (lock->lk_is_new) { | |
893f8770 N |
3949 | /* |
3950 | * Client indicates that this is a new lockowner. | |
3951 | * Use open owner and open stateid to create lock owner and | |
3952 | * lock stateid. | |
3953 | */ | |
1da177e4 | 3954 | struct nfs4_stateid *open_stp = NULL; |
1da177e4 LT |
3955 | |
3956 | status = nfserr_stale_clientid; | |
60adfc50 AA |
3957 | if (!nfsd4_has_session(cstate) && |
3958 | STALE_CLIENTID(&lock->lk_new_clientid)) | |
1da177e4 | 3959 | goto out; |
1da177e4 | 3960 | |
1da177e4 | 3961 | /* validate and update open stateid and open seqid */ |
dd453dfd | 3962 | status = nfs4_preprocess_seqid_op(cstate, |
1da177e4 LT |
3963 | lock->lk_new_open_seqid, |
3964 | &lock->lk_new_open_stateid, | |
f3362737 | 3965 | OPEN_STATE, |
b34f27aa | 3966 | &lock->lk_replay_owner, &open_stp); |
37515177 | 3967 | if (status) |
1da177e4 | 3968 | goto out; |
b34f27aa | 3969 | status = nfserr_bad_stateid; |
3a65588a | 3970 | open_sop = lock->lk_replay_owner; |
b34f27aa BF |
3971 | if (!nfsd4_has_session(cstate) && |
3972 | !same_clid(&open_sop->so_client->cl_clientid, | |
3973 | &lock->v.new.clientid)) | |
3974 | goto out; | |
1da177e4 LT |
3975 | /* create lockowner and lock stateid */ |
3976 | fp = open_stp->st_file; | |
3977 | strhashval = lock_ownerstr_hashval(fp->fi_inode, | |
3978 | open_sop->so_client->cl_clientid.cl_id, | |
3979 | &lock->v.new.owner); | |
3e9e3dbe N |
3980 | /* XXX: Do we need to check for duplicate stateowners on |
3981 | * the same file, or should they just be allowed (and | |
3982 | * create new stateids)? */ | |
3e772463 | 3983 | status = nfserr_jukebox; |
b59e3c0e NB |
3984 | lock_sop = alloc_init_lock_stateowner(strhashval, |
3985 | open_sop->so_client, open_stp, lock); | |
3986 | if (lock_sop == NULL) | |
1da177e4 | 3987 | goto out; |
b59e3c0e | 3988 | lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); |
8a280510 | 3989 | if (lock_stp == NULL) |
1da177e4 | 3990 | goto out; |
1da177e4 LT |
3991 | } else { |
3992 | /* lock (lock owner + lock stateid) already exists */ | |
dd453dfd | 3993 | status = nfs4_preprocess_seqid_op(cstate, |
1da177e4 LT |
3994 | lock->lk_old_lock_seqid, |
3995 | &lock->lk_old_lock_stateid, | |
f3362737 | 3996 | LOCK_STATE, |
b34f27aa | 3997 | &lock->lk_replay_owner, &lock_stp); |
1da177e4 LT |
3998 | if (status) |
3999 | goto out; | |
3a65588a | 4000 | lock_sop = lock->lk_replay_owner; |
7d947842 | 4001 | fp = lock_stp->st_file; |
1da177e4 | 4002 | } |
3a65588a | 4003 | /* lock->lk_replay_owner and lock_stp have been created or found */ |
1da177e4 | 4004 | |
b34f27aa BF |
4005 | lkflg = setlkflg(lock->lk_type); |
4006 | status = nfs4_check_openmode(lock_stp, lkflg); | |
4007 | if (status) | |
4008 | goto out; | |
4009 | ||
0dd395dc | 4010 | status = nfserr_grace; |
af558e33 | 4011 | if (locks_in_grace() && !lock->lk_reclaim) |
0dd395dc N |
4012 | goto out; |
4013 | status = nfserr_no_grace; | |
af558e33 | 4014 | if (!locks_in_grace() && lock->lk_reclaim) |
0dd395dc N |
4015 | goto out; |
4016 | ||
1da177e4 LT |
4017 | locks_init_lock(&file_lock); |
4018 | switch (lock->lk_type) { | |
4019 | case NFS4_READ_LT: | |
4020 | case NFS4_READW_LT: | |
0997b173 BF |
4021 | filp = find_readable_file(lock_stp->st_file); |
4022 | if (filp) | |
4023 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
1da177e4 | 4024 | file_lock.fl_type = F_RDLCK; |
529d7b2a | 4025 | break; |
1da177e4 LT |
4026 | case NFS4_WRITE_LT: |
4027 | case NFS4_WRITEW_LT: | |
0997b173 BF |
4028 | filp = find_writeable_file(lock_stp->st_file); |
4029 | if (filp) | |
4030 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
1da177e4 | 4031 | file_lock.fl_type = F_WRLCK; |
529d7b2a | 4032 | break; |
1da177e4 LT |
4033 | default: |
4034 | status = nfserr_inval; | |
4035 | goto out; | |
4036 | } | |
f9d7562f BF |
4037 | if (!filp) { |
4038 | status = nfserr_openmode; | |
4039 | goto out; | |
4040 | } | |
b59e3c0e | 4041 | file_lock.fl_owner = (fl_owner_t)lock_sop; |
1da177e4 LT |
4042 | file_lock.fl_pid = current->tgid; |
4043 | file_lock.fl_file = filp; | |
4044 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 4045 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
4046 | |
4047 | file_lock.fl_start = lock->lk_offset; | |
87df4de8 | 4048 | file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); |
1da177e4 LT |
4049 | nfs4_transform_lock_offset(&file_lock); |
4050 | ||
4051 | /* | |
4052 | * Try to lock the file in the VFS. | |
4053 | * Note: locks.c uses the BKL to protect the inode's lock list. | |
4054 | */ | |
4055 | ||
529d7b2a | 4056 | err = vfs_lock_file(filp, F_SETLK, &file_lock, &conflock); |
b8dd7b9a | 4057 | switch (-err) { |
1da177e4 LT |
4058 | case 0: /* success! */ |
4059 | update_stateid(&lock_stp->st_stateid); | |
4060 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, | |
4061 | sizeof(stateid_t)); | |
b8dd7b9a | 4062 | status = 0; |
eb76b3fd AA |
4063 | break; |
4064 | case (EAGAIN): /* conflock holds conflicting lock */ | |
4065 | status = nfserr_denied; | |
4066 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
4067 | nfs4_set_lock_denied(&conflock, &lock->lk_denied); | |
4068 | break; | |
1da177e4 LT |
4069 | case (EDEADLK): |
4070 | status = nfserr_deadlock; | |
eb76b3fd | 4071 | break; |
3e772463 | 4072 | default: |
fd85b817 | 4073 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 4074 | status = nfserrno(err); |
eb76b3fd | 4075 | break; |
1da177e4 | 4076 | } |
1da177e4 | 4077 | out: |
8a280510 | 4078 | if (status && lock->lk_is_new && lock_sop) |
f044ff83 | 4079 | release_lockowner(lock_sop); |
1da177e4 LT |
4080 | nfs4_unlock_state(); |
4081 | return status; | |
4082 | } | |
4083 | ||
55ef1274 BF |
4084 | /* |
4085 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
4086 | * so we do a temporary open here just to get an open file to pass to | |
4087 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
4088 | * inode operation.) | |
4089 | */ | |
4090 | static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) | |
4091 | { | |
4092 | struct file *file; | |
4093 | int err; | |
4094 | ||
4095 | err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); | |
4096 | if (err) | |
4097 | return err; | |
4098 | err = vfs_test_lock(file, lock); | |
4099 | nfsd_close(file); | |
4100 | return err; | |
4101 | } | |
4102 | ||
1da177e4 LT |
4103 | /* |
4104 | * LOCKT operation | |
4105 | */ | |
b37ad28b | 4106 | __be32 |
ca364317 BF |
4107 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4108 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
4109 | { |
4110 | struct inode *inode; | |
1da177e4 | 4111 | struct file_lock file_lock; |
fd85b817 | 4112 | int error; |
b37ad28b | 4113 | __be32 status; |
1da177e4 | 4114 | |
af558e33 | 4115 | if (locks_in_grace()) |
1da177e4 LT |
4116 | return nfserr_grace; |
4117 | ||
4118 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
4119 | return nfserr_inval; | |
4120 | ||
4121 | lockt->lt_stateowner = NULL; | |
4122 | nfs4_lock_state(); | |
4123 | ||
4124 | status = nfserr_stale_clientid; | |
60adfc50 | 4125 | if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) |
1da177e4 | 4126 | goto out; |
1da177e4 | 4127 | |
75c096f7 | 4128 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 4129 | goto out; |
1da177e4 | 4130 | |
ca364317 | 4131 | inode = cstate->current_fh.fh_dentry->d_inode; |
1da177e4 LT |
4132 | locks_init_lock(&file_lock); |
4133 | switch (lockt->lt_type) { | |
4134 | case NFS4_READ_LT: | |
4135 | case NFS4_READW_LT: | |
4136 | file_lock.fl_type = F_RDLCK; | |
4137 | break; | |
4138 | case NFS4_WRITE_LT: | |
4139 | case NFS4_WRITEW_LT: | |
4140 | file_lock.fl_type = F_WRLCK; | |
4141 | break; | |
4142 | default: | |
2fdada03 | 4143 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
4144 | status = nfserr_inval; |
4145 | goto out; | |
4146 | } | |
4147 | ||
4148 | lockt->lt_stateowner = find_lockstateowner_str(inode, | |
4149 | &lockt->lt_clientid, &lockt->lt_owner); | |
4150 | if (lockt->lt_stateowner) | |
4151 | file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; | |
4152 | file_lock.fl_pid = current->tgid; | |
4153 | file_lock.fl_flags = FL_POSIX; | |
4154 | ||
4155 | file_lock.fl_start = lockt->lt_offset; | |
87df4de8 | 4156 | file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); |
1da177e4 LT |
4157 | |
4158 | nfs4_transform_lock_offset(&file_lock); | |
4159 | ||
1da177e4 | 4160 | status = nfs_ok; |
55ef1274 | 4161 | error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); |
fd85b817 ME |
4162 | if (error) { |
4163 | status = nfserrno(error); | |
4164 | goto out; | |
4165 | } | |
9d6a8c5c | 4166 | if (file_lock.fl_type != F_UNLCK) { |
1da177e4 | 4167 | status = nfserr_denied; |
9d6a8c5c | 4168 | nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); |
1da177e4 LT |
4169 | } |
4170 | out: | |
4171 | nfs4_unlock_state(); | |
4172 | return status; | |
4173 | } | |
4174 | ||
b37ad28b | 4175 | __be32 |
ca364317 | 4176 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4177 | struct nfsd4_locku *locku) |
1da177e4 LT |
4178 | { |
4179 | struct nfs4_stateid *stp; | |
4180 | struct file *filp = NULL; | |
4181 | struct file_lock file_lock; | |
b37ad28b | 4182 | __be32 status; |
b8dd7b9a | 4183 | int err; |
1da177e4 LT |
4184 | |
4185 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", | |
4186 | (long long) locku->lu_offset, | |
4187 | (long long) locku->lu_length); | |
4188 | ||
4189 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
4190 | return nfserr_inval; | |
4191 | ||
4192 | nfs4_lock_state(); | |
4193 | ||
dd453dfd | 4194 | if ((status = nfs4_preprocess_seqid_op(cstate, |
1da177e4 LT |
4195 | locku->lu_seqid, |
4196 | &locku->lu_stateid, | |
f3362737 | 4197 | LOCK_STATE, |
b34f27aa | 4198 | &locku->lu_stateowner, &stp))) |
1da177e4 LT |
4199 | goto out; |
4200 | ||
f9d7562f BF |
4201 | filp = find_any_file(stp->st_file); |
4202 | if (!filp) { | |
4203 | status = nfserr_lock_range; | |
4204 | goto out; | |
4205 | } | |
1da177e4 LT |
4206 | BUG_ON(!filp); |
4207 | locks_init_lock(&file_lock); | |
4208 | file_lock.fl_type = F_UNLCK; | |
4209 | file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; | |
4210 | file_lock.fl_pid = current->tgid; | |
4211 | file_lock.fl_file = filp; | |
4212 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 4213 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
4214 | file_lock.fl_start = locku->lu_offset; |
4215 | ||
87df4de8 | 4216 | file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); |
1da177e4 LT |
4217 | nfs4_transform_lock_offset(&file_lock); |
4218 | ||
4219 | /* | |
4220 | * Try to unlock the file in the VFS. | |
4221 | */ | |
fd85b817 | 4222 | err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); |
b8dd7b9a | 4223 | if (err) { |
fd85b817 | 4224 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
4225 | goto out_nfserr; |
4226 | } | |
4227 | /* | |
4228 | * OK, unlock succeeded; the only thing left to do is update the stateid. | |
4229 | */ | |
4230 | update_stateid(&stp->st_stateid); | |
4231 | memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
4232 | ||
4233 | out: | |
1da177e4 LT |
4234 | nfs4_unlock_state(); |
4235 | return status; | |
4236 | ||
4237 | out_nfserr: | |
b8dd7b9a | 4238 | status = nfserrno(err); |
1da177e4 LT |
4239 | goto out; |
4240 | } | |
4241 | ||
4242 | /* | |
4243 | * returns | |
4244 | * 1: locks held by lockowner | |
4245 | * 0: no locks held by lockowner | |
4246 | */ | |
4247 | static int | |
f9d7562f | 4248 | check_for_locks(struct nfs4_file *filp, struct nfs4_stateowner *lowner) |
1da177e4 LT |
4249 | { |
4250 | struct file_lock **flpp; | |
f9d7562f | 4251 | struct inode *inode = filp->fi_inode; |
1da177e4 LT |
4252 | int status = 0; |
4253 | ||
b89f4321 | 4254 | lock_flocks(); |
1da177e4 | 4255 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
796dadfd | 4256 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
4257 | status = 1; |
4258 | goto out; | |
796dadfd | 4259 | } |
1da177e4 LT |
4260 | } |
4261 | out: | |
b89f4321 | 4262 | unlock_flocks(); |
1da177e4 LT |
4263 | return status; |
4264 | } | |
4265 | ||
b37ad28b | 4266 | __be32 |
b591480b BF |
4267 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
4268 | struct nfsd4_compound_state *cstate, | |
4269 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
4270 | { |
4271 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe N |
4272 | struct nfs4_stateowner *sop; |
4273 | struct nfs4_stateid *stp; | |
1da177e4 | 4274 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe N |
4275 | struct list_head matches; |
4276 | int i; | |
b37ad28b | 4277 | __be32 status; |
1da177e4 LT |
4278 | |
4279 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
4280 | clid->cl_boot, clid->cl_id); | |
4281 | ||
4282 | /* XXX check for lease expiration */ | |
4283 | ||
4284 | status = nfserr_stale_clientid; | |
849823c5 | 4285 | if (STALE_CLIENTID(clid)) |
1da177e4 | 4286 | return status; |
1da177e4 LT |
4287 | |
4288 | nfs4_lock_state(); | |
4289 | ||
3e9e3dbe N |
4290 | status = nfserr_locks_held; |
4291 | /* XXX: we're doing a linear search through all the lockowners. | |
4292 | * Yipes! For now we'll just hope clients aren't really using | |
4293 | * release_lockowner much, but eventually we have to fix these | |
4294 | * data structures. */ | |
4295 | INIT_LIST_HEAD(&matches); | |
4296 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
4297 | list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { | |
599e0a22 | 4298 | if (!same_owner_str(sop, owner, clid)) |
3e9e3dbe N |
4299 | continue; |
4300 | list_for_each_entry(stp, &sop->so_stateids, | |
4301 | st_perstateowner) { | |
f9d7562f | 4302 | if (check_for_locks(stp->st_file, sop)) |
3e9e3dbe N |
4303 | goto out; |
4304 | /* Note: so_perclient unused for lockowners, | |
4305 | * so it's OK to fool with here. */ | |
4306 | list_add(&sop->so_perclient, &matches); | |
4307 | } | |
1da177e4 | 4308 | } |
3e9e3dbe N |
4309 | } |
4310 | /* Clients probably won't expect us to return with some (but not all) | |
4311 | * of the lockowner state released; so don't release any until all | |
4312 | * have been checked. */ | |
4313 | status = nfs_ok; | |
0fa822e4 N |
4314 | while (!list_empty(&matches)) { |
4315 | sop = list_entry(matches.next, struct nfs4_stateowner, | |
4316 | so_perclient); | |
4317 | /* unhash_stateowner deletes so_perclient only | |
4318 | * for openowners. */ | |
4319 | list_del(&sop->so_perclient); | |
f044ff83 | 4320 | release_lockowner(sop); |
1da177e4 LT |
4321 | } |
4322 | out: | |
4323 | nfs4_unlock_state(); | |
4324 | return status; | |
4325 | } | |
4326 | ||
4327 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 4328 | alloc_reclaim(void) |
1da177e4 | 4329 | { |
a55370a3 | 4330 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
4331 | } |
4332 | ||
c7b9a459 | 4333 | int |
a1bcecd2 | 4334 | nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) |
c7b9a459 N |
4335 | { |
4336 | unsigned int strhashval = clientstr_hashval(name); | |
4337 | struct nfs4_client *clp; | |
4338 | ||
e203d506 | 4339 | clp = find_confirmed_client_by_str(name, strhashval); |
c7b9a459 N |
4340 | return clp ? 1 : 0; |
4341 | } | |
4342 | ||
1da177e4 LT |
4343 | /* |
4344 | * failure => all reset bets are off, nfserr_no_grace... | |
4345 | */ | |
190e4fbf N |
4346 | int |
4347 | nfs4_client_to_reclaim(const char *name) | |
1da177e4 LT |
4348 | { |
4349 | unsigned int strhashval; | |
4350 | struct nfs4_client_reclaim *crp = NULL; | |
4351 | ||
a55370a3 N |
4352 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
4353 | crp = alloc_reclaim(); | |
1da177e4 LT |
4354 | if (!crp) |
4355 | return 0; | |
a55370a3 | 4356 | strhashval = clientstr_hashval(name); |
1da177e4 LT |
4357 | INIT_LIST_HEAD(&crp->cr_strhash); |
4358 | list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); | |
a55370a3 | 4359 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
1da177e4 LT |
4360 | reclaim_str_hashtbl_size++; |
4361 | return 1; | |
4362 | } | |
4363 | ||
4364 | static void | |
4365 | nfs4_release_reclaim(void) | |
4366 | { | |
4367 | struct nfs4_client_reclaim *crp = NULL; | |
4368 | int i; | |
4369 | ||
1da177e4 LT |
4370 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4371 | while (!list_empty(&reclaim_str_hashtbl[i])) { | |
4372 | crp = list_entry(reclaim_str_hashtbl[i].next, | |
4373 | struct nfs4_client_reclaim, cr_strhash); | |
4374 | list_del(&crp->cr_strhash); | |
1da177e4 LT |
4375 | kfree(crp); |
4376 | reclaim_str_hashtbl_size--; | |
4377 | } | |
4378 | } | |
4379 | BUG_ON(reclaim_str_hashtbl_size); | |
4380 | } | |
4381 | ||
4382 | /* | |
4383 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
fd39ca9a | 4384 | static struct nfs4_client_reclaim * |
1da177e4 LT |
4385 | nfs4_find_reclaim_client(clientid_t *clid) |
4386 | { | |
4387 | unsigned int strhashval; | |
4388 | struct nfs4_client *clp; | |
4389 | struct nfs4_client_reclaim *crp = NULL; | |
4390 | ||
4391 | ||
4392 | /* find clientid in conf_id_hashtbl */ | |
4393 | clp = find_confirmed_client(clid); | |
4394 | if (clp == NULL) | |
4395 | return NULL; | |
4396 | ||
a55370a3 N |
4397 | dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", |
4398 | clp->cl_name.len, clp->cl_name.data, | |
4399 | clp->cl_recdir); | |
1da177e4 LT |
4400 | |
4401 | /* find clp->cl_name in reclaim_str_hashtbl */ | |
a55370a3 | 4402 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 | 4403 | list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { |
a55370a3 | 4404 | if (same_name(crp->cr_recdir, clp->cl_recdir)) { |
1da177e4 LT |
4405 | return crp; |
4406 | } | |
4407 | } | |
4408 | return NULL; | |
4409 | } | |
4410 | ||
4411 | /* | |
4412 | * Called from OPEN. Look for clientid in reclaim list. | |
4413 | */ | |
b37ad28b | 4414 | __be32 |
1da177e4 LT |
4415 | nfs4_check_open_reclaim(clientid_t *clid) |
4416 | { | |
dfc83565 | 4417 | return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; |
1da177e4 LT |
4418 | } |
4419 | ||
ac4d8ff2 | 4420 | /* initialization to perform at module load time: */ |
1da177e4 | 4421 | |
e8ff2a84 | 4422 | int |
ac4d8ff2 | 4423 | nfs4_state_init(void) |
1da177e4 | 4424 | { |
e8ff2a84 | 4425 | int i, status; |
1da177e4 | 4426 | |
e8ff2a84 BF |
4427 | status = nfsd4_init_slabs(); |
4428 | if (status) | |
4429 | return status; | |
1da177e4 LT |
4430 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4431 | INIT_LIST_HEAD(&conf_id_hashtbl[i]); | |
4432 | INIT_LIST_HEAD(&conf_str_hashtbl[i]); | |
4433 | INIT_LIST_HEAD(&unconf_str_hashtbl[i]); | |
4434 | INIT_LIST_HEAD(&unconf_id_hashtbl[i]); | |
02cb2858 | 4435 | INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); |
1da177e4 | 4436 | } |
5282fd72 ME |
4437 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
4438 | INIT_LIST_HEAD(&sessionid_hashtbl[i]); | |
1da177e4 LT |
4439 | for (i = 0; i < FILE_HASH_SIZE; i++) { |
4440 | INIT_LIST_HEAD(&file_hashtbl[i]); | |
4441 | } | |
506f275f BF |
4442 | for (i = 0; i < OPEN_OWNER_HASH_SIZE; i++) { |
4443 | INIT_LIST_HEAD(&open_ownerstr_hashtbl[i]); | |
4444 | INIT_LIST_HEAD(&open_ownerid_hashtbl[i]); | |
1da177e4 | 4445 | } |
b79abadd | 4446 | for (i = 0; i < STATEID_HASH_SIZE; i++) |
1da177e4 | 4447 | INIT_LIST_HEAD(&stateid_hashtbl[i]); |
1da177e4 LT |
4448 | for (i = 0; i < LOCK_HASH_SIZE; i++) { |
4449 | INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); | |
4450 | INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); | |
4451 | } | |
1da177e4 | 4452 | memset(&onestateid, ~0, sizeof(stateid_t)); |
1da177e4 LT |
4453 | INIT_LIST_HEAD(&close_lru); |
4454 | INIT_LIST_HEAD(&client_lru); | |
4455 | INIT_LIST_HEAD(&del_recall_lru); | |
ac4d8ff2 | 4456 | reclaim_str_hashtbl_size = 0; |
e8ff2a84 | 4457 | return 0; |
ac4d8ff2 N |
4458 | } |
4459 | ||
190e4fbf N |
4460 | static void |
4461 | nfsd4_load_reboot_recovery_data(void) | |
4462 | { | |
4463 | int status; | |
4464 | ||
0964a3d3 | 4465 | nfs4_lock_state(); |
48483bf2 | 4466 | nfsd4_init_recdir(); |
190e4fbf | 4467 | status = nfsd4_recdir_load(); |
0964a3d3 | 4468 | nfs4_unlock_state(); |
190e4fbf N |
4469 | if (status) |
4470 | printk("NFSD: Failure reading reboot recovery data\n"); | |
4471 | } | |
4472 | ||
c2f1a551 MS |
4473 | /* |
4474 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
4475 | * client may quite reasonably hang on to a delegation as long as it has | |
4476 | * the inode cached. This becomes an obvious problem the first time a | |
4477 | * client's inode cache approaches the size of the server's total memory. | |
4478 | * | |
4479 | * For now we avoid this problem by imposing a hard limit on the number | |
4480 | * of delegations, which varies according to the server's memory size. | |
4481 | */ | |
4482 | static void | |
4483 | set_max_delegations(void) | |
4484 | { | |
4485 | /* | |
4486 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
4487 | * estimates suggest that in the worst case (where every delegation | |
4488 | * is for a different inode), a delegation could take about 1.5K, | |
4489 | * giving a worst case usage of about 6% of memory. | |
4490 | */ | |
4491 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
4492 | } | |
4493 | ||
ac4d8ff2 N |
4494 | /* initialization to perform when the nfsd service is started: */ |
4495 | ||
29ab23cc | 4496 | static int |
ac4d8ff2 N |
4497 | __nfs4_state_start(void) |
4498 | { | |
b5a1a81e BF |
4499 | int ret; |
4500 | ||
1da177e4 | 4501 | boot_time = get_seconds(); |
af558e33 | 4502 | locks_start_grace(&nfsd4_manager); |
9a8db97e | 4503 | printk(KERN_INFO "NFSD: starting %ld-second grace period\n", |
e46b498c | 4504 | nfsd4_grace); |
b5a1a81e BF |
4505 | ret = set_callback_cred(); |
4506 | if (ret) | |
4507 | return -ENOMEM; | |
58da282b | 4508 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
29ab23cc BF |
4509 | if (laundry_wq == NULL) |
4510 | return -ENOMEM; | |
b5a1a81e BF |
4511 | ret = nfsd4_create_callback_queue(); |
4512 | if (ret) | |
4513 | goto out_free_laundry; | |
e46b498c | 4514 | queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); |
c2f1a551 | 4515 | set_max_delegations(); |
b5a1a81e BF |
4516 | return 0; |
4517 | out_free_laundry: | |
4518 | destroy_workqueue(laundry_wq); | |
4519 | return ret; | |
1da177e4 LT |
4520 | } |
4521 | ||
29ab23cc | 4522 | int |
76a3550e | 4523 | nfs4_state_start(void) |
1da177e4 | 4524 | { |
190e4fbf | 4525 | nfsd4_load_reboot_recovery_data(); |
4ad9a344 | 4526 | return __nfs4_state_start(); |
1da177e4 LT |
4527 | } |
4528 | ||
1da177e4 LT |
4529 | static void |
4530 | __nfs4_state_shutdown(void) | |
4531 | { | |
4532 | int i; | |
4533 | struct nfs4_client *clp = NULL; | |
4534 | struct nfs4_delegation *dp = NULL; | |
1da177e4 LT |
4535 | struct list_head *pos, *next, reaplist; |
4536 | ||
1da177e4 LT |
4537 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4538 | while (!list_empty(&conf_id_hashtbl[i])) { | |
4539 | clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
4540 | expire_client(clp); | |
4541 | } | |
4542 | while (!list_empty(&unconf_str_hashtbl[i])) { | |
4543 | clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); | |
4544 | expire_client(clp); | |
4545 | } | |
4546 | } | |
4547 | INIT_LIST_HEAD(&reaplist); | |
4548 | spin_lock(&recall_lock); | |
4549 | list_for_each_safe(pos, next, &del_recall_lru) { | |
4550 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4551 | list_move(&dp->dl_recall_lru, &reaplist); | |
4552 | } | |
4553 | spin_unlock(&recall_lock); | |
4554 | list_for_each_safe(pos, next, &reaplist) { | |
4555 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4556 | list_del_init(&dp->dl_recall_lru); | |
4557 | unhash_delegation(dp); | |
4558 | } | |
4559 | ||
190e4fbf | 4560 | nfsd4_shutdown_recdir(); |
1da177e4 LT |
4561 | } |
4562 | ||
4563 | void | |
4564 | nfs4_state_shutdown(void) | |
4565 | { | |
afe2c511 | 4566 | cancel_delayed_work_sync(&laundromat_work); |
5e8d5c29 | 4567 | destroy_workqueue(laundry_wq); |
2c5e7615 | 4568 | locks_end_grace(&nfsd4_manager); |
1da177e4 LT |
4569 | nfs4_lock_state(); |
4570 | nfs4_release_reclaim(); | |
4571 | __nfs4_state_shutdown(); | |
1da177e4 | 4572 | nfs4_unlock_state(); |
c3935e30 | 4573 | nfsd4_destroy_callback_queue(); |
1da177e4 | 4574 | } |