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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; | |
253 | dp->dl_stateid.si_generation = 0; | |
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; | |
2294 | stp->st_stateid.si_generation = 0; | |
2295 | stp->st_access_bmap = 0; | |
2296 | stp->st_deny_bmap = 0; | |
84459a11 AA |
2297 | __set_bit(open->op_share_access & ~NFS4_SHARE_WANT_MASK, |
2298 | &stp->st_access_bmap); | |
1da177e4 | 2299 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
4c4cd222 | 2300 | stp->st_openstp = NULL; |
1da177e4 LT |
2301 | } |
2302 | ||
fd39ca9a | 2303 | static void |
1da177e4 LT |
2304 | move_to_close_lru(struct nfs4_stateowner *sop) |
2305 | { | |
2306 | dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); | |
2307 | ||
358dd55a | 2308 | list_move_tail(&sop->so_close_lru, &close_lru); |
1da177e4 LT |
2309 | sop->so_time = get_seconds(); |
2310 | } | |
2311 | ||
1da177e4 | 2312 | static int |
599e0a22 BF |
2313 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
2314 | clientid_t *clid) | |
2315 | { | |
2316 | return (sop->so_owner.len == owner->len) && | |
2317 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
2318 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
2319 | } |
2320 | ||
2321 | static struct nfs4_stateowner * | |
2322 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) | |
2323 | { | |
2324 | struct nfs4_stateowner *so = NULL; | |
2325 | ||
506f275f | 2326 | list_for_each_entry(so, &open_ownerstr_hashtbl[hashval], so_strhash) { |
599e0a22 | 2327 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) |
1da177e4 LT |
2328 | return so; |
2329 | } | |
2330 | return NULL; | |
2331 | } | |
2332 | ||
2333 | /* search file_hashtbl[] for file */ | |
2334 | static struct nfs4_file * | |
2335 | find_file(struct inode *ino) | |
2336 | { | |
2337 | unsigned int hashval = file_hashval(ino); | |
2338 | struct nfs4_file *fp; | |
2339 | ||
8b671b80 | 2340 | spin_lock(&recall_lock); |
1da177e4 | 2341 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
13cd2184 N |
2342 | if (fp->fi_inode == ino) { |
2343 | get_nfs4_file(fp); | |
8b671b80 | 2344 | spin_unlock(&recall_lock); |
1da177e4 | 2345 | return fp; |
13cd2184 | 2346 | } |
1da177e4 | 2347 | } |
8b671b80 | 2348 | spin_unlock(&recall_lock); |
1da177e4 LT |
2349 | return NULL; |
2350 | } | |
2351 | ||
d87a8ade | 2352 | static inline int access_valid(u32 x, u32 minorversion) |
ba5a6a19 | 2353 | { |
d87a8ade | 2354 | if ((x & NFS4_SHARE_ACCESS_MASK) < NFS4_SHARE_ACCESS_READ) |
8838dc43 | 2355 | return 0; |
d87a8ade AA |
2356 | if ((x & NFS4_SHARE_ACCESS_MASK) > NFS4_SHARE_ACCESS_BOTH) |
2357 | return 0; | |
2358 | x &= ~NFS4_SHARE_ACCESS_MASK; | |
2359 | if (minorversion && x) { | |
2360 | if ((x & NFS4_SHARE_WANT_MASK) > NFS4_SHARE_WANT_CANCEL) | |
2361 | return 0; | |
2362 | if ((x & NFS4_SHARE_WHEN_MASK) > NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED) | |
2363 | return 0; | |
2364 | x &= ~(NFS4_SHARE_WANT_MASK | NFS4_SHARE_WHEN_MASK); | |
2365 | } | |
2366 | if (x) | |
8838dc43 BF |
2367 | return 0; |
2368 | return 1; | |
ba5a6a19 BF |
2369 | } |
2370 | ||
8838dc43 | 2371 | static inline int deny_valid(u32 x) |
ba5a6a19 | 2372 | { |
8838dc43 BF |
2373 | /* Note: unlike access bits, deny bits may be zero. */ |
2374 | return x <= NFS4_SHARE_DENY_BOTH; | |
ba5a6a19 | 2375 | } |
1da177e4 | 2376 | |
1da177e4 LT |
2377 | /* |
2378 | * Called to check deny when READ with all zero stateid or | |
2379 | * WRITE with all zero or all one stateid | |
2380 | */ | |
b37ad28b | 2381 | static __be32 |
1da177e4 LT |
2382 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
2383 | { | |
2384 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2385 | struct nfs4_file *fp; | |
2386 | struct nfs4_stateid *stp; | |
b37ad28b | 2387 | __be32 ret; |
1da177e4 LT |
2388 | |
2389 | dprintk("NFSD: nfs4_share_conflict\n"); | |
2390 | ||
2391 | fp = find_file(ino); | |
13cd2184 N |
2392 | if (!fp) |
2393 | return nfs_ok; | |
b700949b | 2394 | ret = nfserr_locked; |
1da177e4 | 2395 | /* Search for conflicting share reservations */ |
13cd2184 N |
2396 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
2397 | if (test_bit(deny_type, &stp->st_deny_bmap) || | |
2398 | test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) | |
2399 | goto out; | |
1da177e4 | 2400 | } |
13cd2184 N |
2401 | ret = nfs_ok; |
2402 | out: | |
2403 | put_nfs4_file(fp); | |
2404 | return ret; | |
1da177e4 LT |
2405 | } |
2406 | ||
6b57d9c8 | 2407 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
1da177e4 | 2408 | { |
1da177e4 LT |
2409 | /* We're assuming the state code never drops its reference |
2410 | * without first removing the lease. Since we're in this lease | |
2411 | * callback (and since the lease code is serialized by the kernel | |
2412 | * lock) we know the server hasn't removed the lease yet, we know | |
2413 | * it's safe to take a reference: */ | |
2414 | atomic_inc(&dp->dl_count); | |
2415 | ||
1da177e4 | 2416 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); |
1da177e4 | 2417 | |
460781b5 | 2418 | /* only place dl_time is set. protected by lock_flocks*/ |
1da177e4 LT |
2419 | dp->dl_time = get_seconds(); |
2420 | ||
6b57d9c8 BF |
2421 | nfsd4_cb_recall(dp); |
2422 | } | |
2423 | ||
acfdf5c3 | 2424 | /* Called from break_lease() with lock_flocks() held. */ |
6b57d9c8 BF |
2425 | static void nfsd_break_deleg_cb(struct file_lock *fl) |
2426 | { | |
acfdf5c3 BF |
2427 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
2428 | struct nfs4_delegation *dp; | |
6b57d9c8 | 2429 | |
acfdf5c3 BF |
2430 | BUG_ON(!fp); |
2431 | /* We assume break_lease is only called once per lease: */ | |
2432 | BUG_ON(fp->fi_had_conflict); | |
0272e1fd BF |
2433 | /* |
2434 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 2435 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 2436 | * in time: |
0272e1fd BF |
2437 | */ |
2438 | fl->fl_break_time = 0; | |
1da177e4 | 2439 | |
5d926e8c | 2440 | spin_lock(&recall_lock); |
acfdf5c3 BF |
2441 | fp->fi_had_conflict = true; |
2442 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
2443 | nfsd_break_one_deleg(dp); | |
5d926e8c | 2444 | spin_unlock(&recall_lock); |
1da177e4 LT |
2445 | } |
2446 | ||
1da177e4 LT |
2447 | static |
2448 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
2449 | { | |
2450 | if (arg & F_UNLCK) | |
2451 | return lease_modify(onlist, arg); | |
2452 | else | |
2453 | return -EAGAIN; | |
2454 | } | |
2455 | ||
7b021967 | 2456 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
2457 | .lm_break = nfsd_break_deleg_cb, |
2458 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
2459 | }; |
2460 | ||
2461 | ||
b37ad28b | 2462 | __be32 |
6668958f AA |
2463 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
2464 | struct nfsd4_open *open) | |
1da177e4 | 2465 | { |
1da177e4 LT |
2466 | clientid_t *clientid = &open->op_clientid; |
2467 | struct nfs4_client *clp = NULL; | |
2468 | unsigned int strhashval; | |
2469 | struct nfs4_stateowner *sop = NULL; | |
2470 | ||
1da177e4 | 2471 | if (!check_name(open->op_owner)) |
0f442aa2 | 2472 | return nfserr_inval; |
1da177e4 LT |
2473 | |
2474 | if (STALE_CLIENTID(&open->op_clientid)) | |
2475 | return nfserr_stale_clientid; | |
2476 | ||
506f275f | 2477 | strhashval = open_ownerstr_hashval(clientid->cl_id, &open->op_owner); |
1da177e4 | 2478 | sop = find_openstateowner_str(strhashval, open); |
0f442aa2 BF |
2479 | open->op_stateowner = sop; |
2480 | if (!sop) { | |
2481 | /* Make sure the client's lease hasn't expired. */ | |
1da177e4 LT |
2482 | clp = find_confirmed_client(clientid); |
2483 | if (clp == NULL) | |
0f442aa2 BF |
2484 | return nfserr_expired; |
2485 | goto renew; | |
1da177e4 | 2486 | } |
6668958f AA |
2487 | /* When sessions are used, skip open sequenceid processing */ |
2488 | if (nfsd4_has_session(cstate)) | |
2489 | goto renew; | |
0f442aa2 BF |
2490 | if (!sop->so_confirmed) { |
2491 | /* Replace unconfirmed owners without checking for replay. */ | |
2492 | clp = sop->so_client; | |
f044ff83 | 2493 | release_openowner(sop); |
0f442aa2 BF |
2494 | open->op_stateowner = NULL; |
2495 | goto renew; | |
2496 | } | |
2497 | if (open->op_seqid == sop->so_seqid - 1) { | |
2498 | if (sop->so_replay.rp_buflen) | |
a90b061c | 2499 | return nfserr_replay_me; |
0f442aa2 BF |
2500 | /* The original OPEN failed so spectacularly |
2501 | * that we don't even have replay data saved! | |
2502 | * Therefore, we have no choice but to continue | |
2503 | * processing this OPEN; presumably, we'll | |
2504 | * fail again for the same reason. | |
2505 | */ | |
2506 | dprintk("nfsd4_process_open1: replay with no replay cache\n"); | |
2507 | goto renew; | |
2508 | } | |
2509 | if (open->op_seqid != sop->so_seqid) | |
2510 | return nfserr_bad_seqid; | |
1da177e4 | 2511 | renew: |
0f442aa2 BF |
2512 | if (open->op_stateowner == NULL) { |
2513 | sop = alloc_init_open_stateowner(strhashval, clp, open); | |
2514 | if (sop == NULL) | |
3e772463 | 2515 | return nfserr_jukebox; |
0f442aa2 BF |
2516 | open->op_stateowner = sop; |
2517 | } | |
2518 | list_del_init(&sop->so_close_lru); | |
1da177e4 | 2519 | renew_client(sop->so_client); |
0f442aa2 | 2520 | return nfs_ok; |
1da177e4 LT |
2521 | } |
2522 | ||
b37ad28b | 2523 | static inline __be32 |
4a6e43e6 N |
2524 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
2525 | { | |
2526 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
2527 | return nfserr_openmode; | |
2528 | else | |
2529 | return nfs_ok; | |
2530 | } | |
2531 | ||
52f4fb43 N |
2532 | static struct nfs4_delegation * |
2533 | find_delegation_file(struct nfs4_file *fp, stateid_t *stid) | |
2534 | { | |
32b007b4 | 2535 | struct nfs4_delegation *dp; |
52f4fb43 | 2536 | |
acfdf5c3 | 2537 | spin_lock(&recall_lock); |
32b007b4 BF |
2538 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) |
2539 | if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) { | |
2540 | spin_unlock(&recall_lock); | |
2541 | return dp; | |
2542 | } | |
acfdf5c3 | 2543 | spin_unlock(&recall_lock); |
32b007b4 | 2544 | return NULL; |
52f4fb43 N |
2545 | } |
2546 | ||
c47d832b | 2547 | static int share_access_to_flags(u32 share_access) |
24a0111e BF |
2548 | { |
2549 | share_access &= ~NFS4_SHARE_WANT_MASK; | |
2550 | ||
2551 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; | |
2552 | } | |
2553 | ||
b37ad28b | 2554 | static __be32 |
567d9829 N |
2555 | nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, |
2556 | struct nfs4_delegation **dp) | |
2557 | { | |
2558 | int flags; | |
b37ad28b | 2559 | __be32 status = nfserr_bad_stateid; |
567d9829 N |
2560 | |
2561 | *dp = find_delegation_file(fp, &open->op_delegate_stateid); | |
2562 | if (*dp == NULL) | |
c44c5eeb | 2563 | goto out; |
24a0111e | 2564 | flags = share_access_to_flags(open->op_share_access); |
567d9829 N |
2565 | status = nfs4_check_delegmode(*dp, flags); |
2566 | if (status) | |
2567 | *dp = NULL; | |
c44c5eeb N |
2568 | out: |
2569 | if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2570 | return nfs_ok; | |
2571 | if (status) | |
2572 | return status; | |
2573 | open->op_stateowner->so_confirmed = 1; | |
2574 | return nfs_ok; | |
567d9829 N |
2575 | } |
2576 | ||
b37ad28b | 2577 | static __be32 |
1da177e4 LT |
2578 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) |
2579 | { | |
2580 | struct nfs4_stateid *local; | |
b37ad28b | 2581 | __be32 status = nfserr_share_denied; |
1da177e4 LT |
2582 | struct nfs4_stateowner *sop = open->op_stateowner; |
2583 | ||
8beefa24 | 2584 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
2585 | /* ignore lock owners */ |
2586 | if (local->st_stateowner->so_is_open_owner == 0) | |
2587 | continue; | |
2588 | /* remember if we have seen this open owner */ | |
2589 | if (local->st_stateowner == sop) | |
2590 | *stpp = local; | |
2591 | /* check for conflicting share reservations */ | |
2592 | if (!test_share(local, open)) | |
2593 | goto out; | |
2594 | } | |
2595 | status = 0; | |
2596 | out: | |
2597 | return status; | |
2598 | } | |
2599 | ||
5ac049ac N |
2600 | static inline struct nfs4_stateid * |
2601 | nfs4_alloc_stateid(void) | |
2602 | { | |
2603 | return kmem_cache_alloc(stateid_slab, GFP_KERNEL); | |
2604 | } | |
2605 | ||
21fb4016 BF |
2606 | static inline int nfs4_access_to_access(u32 nfs4_access) |
2607 | { | |
2608 | int flags = 0; | |
2609 | ||
2610 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
2611 | flags |= NFSD_MAY_READ; | |
2612 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
2613 | flags |= NFSD_MAY_WRITE; | |
2614 | return flags; | |
2615 | } | |
2616 | ||
0c12eaff CB |
2617 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
2618 | struct svc_fh *cur_fh, struct nfsd4_open *open) | |
f9d7562f BF |
2619 | { |
2620 | __be32 status; | |
0c12eaff CB |
2621 | int oflag = nfs4_access_to_omode(open->op_share_access); |
2622 | int access = nfs4_access_to_access(open->op_share_access); | |
2623 | ||
2624 | /* CLAIM_DELEGATE_CUR is used in response to a broken lease; | |
2625 | * allowing it to break the lease and return EAGAIN leaves the | |
2626 | * client unable to make progress in returning the delegation */ | |
2627 | if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2628 | access |= NFSD_MAY_NOT_BREAK_LEASE; | |
f9d7562f BF |
2629 | |
2630 | if (!fp->fi_fds[oflag]) { | |
2631 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, | |
2632 | &fp->fi_fds[oflag]); | |
f9d7562f BF |
2633 | if (status) |
2634 | return status; | |
2635 | } | |
2636 | nfs4_file_get_access(fp, oflag); | |
2637 | ||
2638 | return nfs_ok; | |
2639 | } | |
2640 | ||
b37ad28b | 2641 | static __be32 |
1da177e4 | 2642 | nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, |
f9d7562f BF |
2643 | struct nfs4_file *fp, struct svc_fh *cur_fh, |
2644 | struct nfsd4_open *open) | |
1da177e4 LT |
2645 | { |
2646 | struct nfs4_stateid *stp; | |
f9d7562f | 2647 | __be32 status; |
1da177e4 | 2648 | |
5ac049ac | 2649 | stp = nfs4_alloc_stateid(); |
1da177e4 | 2650 | if (stp == NULL) |
3e772463 | 2651 | return nfserr_jukebox; |
1da177e4 | 2652 | |
0c12eaff | 2653 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); |
f9d7562f BF |
2654 | if (status) { |
2655 | kmem_cache_free(stateid_slab, stp); | |
2656 | return status; | |
1da177e4 | 2657 | } |
1da177e4 LT |
2658 | *stpp = stp; |
2659 | return 0; | |
2660 | } | |
2661 | ||
b37ad28b | 2662 | static inline __be32 |
1da177e4 LT |
2663 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
2664 | struct nfsd4_open *open) | |
2665 | { | |
2666 | struct iattr iattr = { | |
2667 | .ia_valid = ATTR_SIZE, | |
2668 | .ia_size = 0, | |
2669 | }; | |
2670 | if (!open->op_truncate) | |
2671 | return 0; | |
2672 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 2673 | return nfserr_inval; |
1da177e4 LT |
2674 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
2675 | } | |
2676 | ||
b37ad28b | 2677 | static __be32 |
f9d7562f | 2678 | 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 | 2679 | { |
7d947842 BF |
2680 | u32 op_share_access = open->op_share_access & ~NFS4_SHARE_WANT_MASK; |
2681 | bool new_access; | |
b37ad28b | 2682 | __be32 status; |
1da177e4 | 2683 | |
7d947842 | 2684 | new_access = !test_bit(op_share_access, &stp->st_access_bmap); |
f9d7562f | 2685 | if (new_access) { |
0c12eaff | 2686 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); |
f9d7562f BF |
2687 | if (status) |
2688 | return status; | |
6c26d08f | 2689 | } |
1da177e4 LT |
2690 | status = nfsd4_truncate(rqstp, cur_fh, open); |
2691 | if (status) { | |
f9d7562f | 2692 | if (new_access) { |
f197c271 | 2693 | int oflag = nfs4_access_to_omode(op_share_access); |
f9d7562f BF |
2694 | nfs4_file_put_access(fp, oflag); |
2695 | } | |
1da177e4 LT |
2696 | return status; |
2697 | } | |
2698 | /* remember the open */ | |
24a0111e | 2699 | __set_bit(op_share_access, &stp->st_access_bmap); |
b55e0ba1 | 2700 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
1da177e4 LT |
2701 | |
2702 | return nfs_ok; | |
2703 | } | |
2704 | ||
2705 | ||
1da177e4 | 2706 | static void |
37515177 | 2707 | nfs4_set_claim_prev(struct nfsd4_open *open) |
1da177e4 | 2708 | { |
37515177 N |
2709 | open->op_stateowner->so_confirmed = 1; |
2710 | open->op_stateowner->so_client->cl_firststate = 1; | |
1da177e4 LT |
2711 | } |
2712 | ||
14a24e99 BF |
2713 | /* Should we give out recallable state?: */ |
2714 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
2715 | { | |
2716 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
2717 | return true; | |
2718 | /* | |
2719 | * In the sessions case, since we don't have to establish a | |
2720 | * separate connection for callbacks, we assume it's OK | |
2721 | * until we hear otherwise: | |
2722 | */ | |
2723 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
2724 | } | |
2725 | ||
22d38c4c BF |
2726 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) |
2727 | { | |
2728 | struct file_lock *fl; | |
2729 | ||
2730 | fl = locks_alloc_lock(); | |
2731 | if (!fl) | |
2732 | return NULL; | |
2733 | locks_init_lock(fl); | |
2734 | fl->fl_lmops = &nfsd_lease_mng_ops; | |
2735 | fl->fl_flags = FL_LEASE; | |
2736 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; | |
2737 | fl->fl_end = OFFSET_MAX; | |
acfdf5c3 | 2738 | fl->fl_owner = (fl_owner_t)(dp->dl_file); |
22d38c4c | 2739 | fl->fl_pid = current->tgid; |
22d38c4c BF |
2740 | return fl; |
2741 | } | |
2742 | ||
edab9782 BF |
2743 | static int nfs4_setlease(struct nfs4_delegation *dp, int flag) |
2744 | { | |
acfdf5c3 | 2745 | struct nfs4_file *fp = dp->dl_file; |
edab9782 BF |
2746 | struct file_lock *fl; |
2747 | int status; | |
2748 | ||
2749 | fl = nfs4_alloc_init_lease(dp, flag); | |
2750 | if (!fl) | |
2751 | return -ENOMEM; | |
acfdf5c3 BF |
2752 | fl->fl_file = find_readable_file(fp); |
2753 | list_add(&dp->dl_perclnt, &dp->dl_client->cl_delegations); | |
2754 | status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); | |
edab9782 | 2755 | if (status) { |
acfdf5c3 | 2756 | list_del_init(&dp->dl_perclnt); |
edab9782 BF |
2757 | locks_free_lock(fl); |
2758 | return -ENOMEM; | |
2759 | } | |
acfdf5c3 BF |
2760 | fp->fi_lease = fl; |
2761 | fp->fi_deleg_file = fl->fl_file; | |
2762 | get_file(fp->fi_deleg_file); | |
2763 | atomic_set(&fp->fi_delegees, 1); | |
2764 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2765 | return 0; | |
2766 | } | |
2767 | ||
2768 | static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag) | |
2769 | { | |
2770 | struct nfs4_file *fp = dp->dl_file; | |
2771 | ||
2772 | if (!fp->fi_lease) | |
2773 | return nfs4_setlease(dp, flag); | |
2774 | spin_lock(&recall_lock); | |
2775 | if (fp->fi_had_conflict) { | |
2776 | spin_unlock(&recall_lock); | |
2777 | return -EAGAIN; | |
2778 | } | |
2779 | atomic_inc(&fp->fi_delegees); | |
2780 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2781 | spin_unlock(&recall_lock); | |
2782 | list_add(&dp->dl_perclnt, &dp->dl_client->cl_delegations); | |
edab9782 BF |
2783 | return 0; |
2784 | } | |
2785 | ||
1da177e4 LT |
2786 | /* |
2787 | * Attempt to hand out a delegation. | |
2788 | */ | |
2789 | static void | |
2790 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) | |
2791 | { | |
2792 | struct nfs4_delegation *dp; | |
2793 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
14a24e99 | 2794 | int cb_up; |
1da177e4 LT |
2795 | int status, flag = 0; |
2796 | ||
14a24e99 | 2797 | cb_up = nfsd4_cb_channel_good(sop->so_client); |
1da177e4 | 2798 | flag = NFS4_OPEN_DELEGATE_NONE; |
7b190fec N |
2799 | open->op_recall = 0; |
2800 | switch (open->op_claim_type) { | |
2801 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 2802 | if (!cb_up) |
7b190fec N |
2803 | open->op_recall = 1; |
2804 | flag = open->op_delegate_type; | |
2805 | if (flag == NFS4_OPEN_DELEGATE_NONE) | |
2806 | goto out; | |
2807 | break; | |
2808 | case NFS4_OPEN_CLAIM_NULL: | |
2809 | /* Let's not give out any delegations till everyone's | |
2810 | * had the chance to reclaim theirs.... */ | |
af558e33 | 2811 | if (locks_in_grace()) |
7b190fec | 2812 | goto out; |
2bf23875 | 2813 | if (!cb_up || !sop->so_confirmed) |
7b190fec N |
2814 | goto out; |
2815 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | |
2816 | flag = NFS4_OPEN_DELEGATE_WRITE; | |
2817 | else | |
2818 | flag = NFS4_OPEN_DELEGATE_READ; | |
2819 | break; | |
2820 | default: | |
2821 | goto out; | |
2822 | } | |
1da177e4 LT |
2823 | |
2824 | dp = alloc_init_deleg(sop->so_client, stp, fh, flag); | |
dd239cc0 BF |
2825 | if (dp == NULL) |
2826 | goto out_no_deleg; | |
acfdf5c3 | 2827 | status = nfs4_set_delegation(dp, flag); |
edab9782 | 2828 | if (status) |
dd239cc0 | 2829 | goto out_free; |
1da177e4 LT |
2830 | |
2831 | memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); | |
2832 | ||
8c10cbdb BH |
2833 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
2834 | STATEID_VAL(&dp->dl_stateid)); | |
1da177e4 | 2835 | out: |
7b190fec N |
2836 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS |
2837 | && flag == NFS4_OPEN_DELEGATE_NONE | |
2838 | && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) | |
2fdada03 | 2839 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
1da177e4 | 2840 | open->op_delegate_type = flag; |
dd239cc0 BF |
2841 | return; |
2842 | out_free: | |
acfdf5c3 | 2843 | nfs4_put_delegation(dp); |
dd239cc0 BF |
2844 | out_no_deleg: |
2845 | flag = NFS4_OPEN_DELEGATE_NONE; | |
2846 | goto out; | |
1da177e4 LT |
2847 | } |
2848 | ||
2849 | /* | |
2850 | * called with nfs4_lock_state() held. | |
2851 | */ | |
b37ad28b | 2852 | __be32 |
1da177e4 LT |
2853 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
2854 | { | |
6668958f | 2855 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
1da177e4 LT |
2856 | struct nfs4_file *fp = NULL; |
2857 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2858 | struct nfs4_stateid *stp = NULL; | |
567d9829 | 2859 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 2860 | __be32 status; |
1da177e4 LT |
2861 | |
2862 | status = nfserr_inval; | |
d87a8ade | 2863 | if (!access_valid(open->op_share_access, resp->cstate.minorversion) |
ba5a6a19 | 2864 | || !deny_valid(open->op_share_deny)) |
1da177e4 LT |
2865 | goto out; |
2866 | /* | |
2867 | * Lookup file; if found, lookup stateid and check open request, | |
2868 | * and check for delegations in the process of being recalled. | |
2869 | * If not found, create the nfs4_file struct | |
2870 | */ | |
2871 | fp = find_file(ino); | |
2872 | if (fp) { | |
2873 | if ((status = nfs4_check_open(fp, open, &stp))) | |
2874 | goto out; | |
c44c5eeb N |
2875 | status = nfs4_check_deleg(fp, open, &dp); |
2876 | if (status) | |
2877 | goto out; | |
1da177e4 | 2878 | } else { |
c44c5eeb N |
2879 | status = nfserr_bad_stateid; |
2880 | if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2881 | goto out; | |
3e772463 | 2882 | status = nfserr_jukebox; |
1da177e4 LT |
2883 | fp = alloc_init_file(ino); |
2884 | if (fp == NULL) | |
2885 | goto out; | |
2886 | } | |
2887 | ||
2888 | /* | |
2889 | * OPEN the file, or upgrade an existing OPEN. | |
2890 | * If truncate fails, the OPEN fails. | |
2891 | */ | |
2892 | if (stp) { | |
2893 | /* Stateid was found, this is an OPEN upgrade */ | |
f9d7562f | 2894 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
1da177e4 LT |
2895 | if (status) |
2896 | goto out; | |
444c2c07 | 2897 | update_stateid(&stp->st_stateid); |
1da177e4 | 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 | } | |
6668958f AA |
2908 | if (nfsd4_has_session(&resp->cstate)) |
2909 | update_stateid(&stp->st_stateid); | |
1da177e4 LT |
2910 | } |
2911 | memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2912 | ||
4dc6ec00 | 2913 | if (nfsd4_has_session(&resp->cstate)) |
6668958f AA |
2914 | open->op_stateowner->so_confirmed = 1; |
2915 | ||
1da177e4 LT |
2916 | /* |
2917 | * Attempt to hand out a delegation. No error return, because the | |
2918 | * OPEN succeeds even if we fail. | |
2919 | */ | |
2920 | nfs4_open_delegation(current_fh, open, stp); | |
2921 | ||
2922 | status = nfs_ok; | |
2923 | ||
8c10cbdb BH |
2924 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
2925 | STATEID_VAL(&stp->st_stateid)); | |
1da177e4 | 2926 | out: |
13cd2184 N |
2927 | if (fp) |
2928 | put_nfs4_file(fp); | |
37515177 N |
2929 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
2930 | nfs4_set_claim_prev(open); | |
1da177e4 LT |
2931 | /* |
2932 | * To finish the open response, we just need to set the rflags. | |
2933 | */ | |
2934 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
6668958f AA |
2935 | if (!open->op_stateowner->so_confirmed && |
2936 | !nfsd4_has_session(&resp->cstate)) | |
1da177e4 LT |
2937 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
2938 | ||
2939 | return status; | |
2940 | } | |
2941 | ||
b37ad28b | 2942 | __be32 |
b591480b BF |
2943 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2944 | clientid_t *clid) | |
1da177e4 LT |
2945 | { |
2946 | struct nfs4_client *clp; | |
b37ad28b | 2947 | __be32 status; |
1da177e4 LT |
2948 | |
2949 | nfs4_lock_state(); | |
2950 | dprintk("process_renew(%08x/%08x): starting\n", | |
2951 | clid->cl_boot, clid->cl_id); | |
2952 | status = nfserr_stale_clientid; | |
2953 | if (STALE_CLIENTID(clid)) | |
2954 | goto out; | |
2955 | clp = find_confirmed_client(clid); | |
2956 | status = nfserr_expired; | |
2957 | if (clp == NULL) { | |
2958 | /* We assume the client took too long to RENEW. */ | |
2959 | dprintk("nfsd4_renew: clientid not found!\n"); | |
2960 | goto out; | |
2961 | } | |
2962 | renew_client(clp); | |
2963 | status = nfserr_cb_path_down; | |
ea1da636 | 2964 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 2965 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
2966 | goto out; |
2967 | status = nfs_ok; | |
2968 | out: | |
2969 | nfs4_unlock_state(); | |
2970 | return status; | |
2971 | } | |
2972 | ||
c47d832b | 2973 | static struct lock_manager nfsd4_manager = { |
af558e33 BF |
2974 | }; |
2975 | ||
a76b4319 | 2976 | static void |
af558e33 | 2977 | nfsd4_end_grace(void) |
a76b4319 N |
2978 | { |
2979 | dprintk("NFSD: end of grace period\n"); | |
c7b9a459 | 2980 | nfsd4_recdir_purge_old(); |
af558e33 | 2981 | locks_end_grace(&nfsd4_manager); |
e46b498c BF |
2982 | /* |
2983 | * Now that every NFSv4 client has had the chance to recover and | |
2984 | * to see the (possibly new, possibly shorter) lease time, we | |
2985 | * can safely set the next grace time to the current lease time: | |
2986 | */ | |
2987 | nfsd4_grace = nfsd4_lease; | |
a76b4319 N |
2988 | } |
2989 | ||
fd39ca9a | 2990 | static time_t |
1da177e4 LT |
2991 | nfs4_laundromat(void) |
2992 | { | |
2993 | struct nfs4_client *clp; | |
2994 | struct nfs4_stateowner *sop; | |
2995 | struct nfs4_delegation *dp; | |
2996 | struct list_head *pos, *next, reaplist; | |
cf07d2ea BF |
2997 | time_t cutoff = get_seconds() - nfsd4_lease; |
2998 | time_t t, clientid_val = nfsd4_lease; | |
2999 | time_t u, test_val = nfsd4_lease; | |
1da177e4 LT |
3000 | |
3001 | nfs4_lock_state(); | |
3002 | ||
3003 | dprintk("NFSD: laundromat service - starting\n"); | |
af558e33 BF |
3004 | if (locks_in_grace()) |
3005 | nfsd4_end_grace(); | |
36acb66b BH |
3006 | INIT_LIST_HEAD(&reaplist); |
3007 | spin_lock(&client_lock); | |
1da177e4 LT |
3008 | list_for_each_safe(pos, next, &client_lru) { |
3009 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
3010 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
3011 | t = clp->cl_time - cutoff; | |
3012 | if (clientid_val > t) | |
3013 | clientid_val = t; | |
3014 | break; | |
3015 | } | |
d7682988 BH |
3016 | if (atomic_read(&clp->cl_refcount)) { |
3017 | dprintk("NFSD: client in use (clientid %08x)\n", | |
3018 | clp->cl_clientid.cl_id); | |
3019 | continue; | |
3020 | } | |
3021 | unhash_client_locked(clp); | |
3022 | list_add(&clp->cl_lru, &reaplist); | |
36acb66b BH |
3023 | } |
3024 | spin_unlock(&client_lock); | |
3025 | list_for_each_safe(pos, next, &reaplist) { | |
3026 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
3027 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
3028 | clp->cl_clientid.cl_id); | |
c7b9a459 | 3029 | nfsd4_remove_clid_dir(clp); |
1da177e4 LT |
3030 | expire_client(clp); |
3031 | } | |
1da177e4 LT |
3032 | spin_lock(&recall_lock); |
3033 | list_for_each_safe(pos, next, &del_recall_lru) { | |
3034 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3035 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
3036 | u = dp->dl_time - cutoff; | |
3037 | if (test_val > u) | |
3038 | test_val = u; | |
3039 | break; | |
3040 | } | |
1da177e4 LT |
3041 | list_move(&dp->dl_recall_lru, &reaplist); |
3042 | } | |
3043 | spin_unlock(&recall_lock); | |
3044 | list_for_each_safe(pos, next, &reaplist) { | |
3045 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3046 | list_del_init(&dp->dl_recall_lru); | |
3047 | unhash_delegation(dp); | |
3048 | } | |
cf07d2ea | 3049 | test_val = nfsd4_lease; |
1da177e4 LT |
3050 | list_for_each_safe(pos, next, &close_lru) { |
3051 | sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); | |
3052 | if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { | |
3053 | u = sop->so_time - cutoff; | |
3054 | if (test_val > u) | |
3055 | test_val = u; | |
3056 | break; | |
3057 | } | |
3058 | dprintk("NFSD: purging unused open stateowner (so_id %d)\n", | |
3059 | sop->so_id); | |
f044ff83 | 3060 | release_openowner(sop); |
1da177e4 LT |
3061 | } |
3062 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
3063 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
3064 | nfs4_unlock_state(); | |
3065 | return clientid_val; | |
3066 | } | |
3067 | ||
a254b246 HH |
3068 | static struct workqueue_struct *laundry_wq; |
3069 | static void laundromat_main(struct work_struct *); | |
3070 | static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); | |
3071 | ||
3072 | static void | |
c4028958 | 3073 | laundromat_main(struct work_struct *not_used) |
1da177e4 LT |
3074 | { |
3075 | time_t t; | |
3076 | ||
3077 | t = nfs4_laundromat(); | |
3078 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); | |
58da282b | 3079 | queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); |
1da177e4 LT |
3080 | } |
3081 | ||
fd39ca9a | 3082 | static struct nfs4_stateowner * |
f8816512 N |
3083 | search_close_lru(u32 st_id, int flags) |
3084 | { | |
1da177e4 LT |
3085 | struct nfs4_stateowner *local = NULL; |
3086 | ||
1da177e4 LT |
3087 | if (flags & CLOSE_STATE) { |
3088 | list_for_each_entry(local, &close_lru, so_close_lru) { | |
3089 | if (local->so_id == st_id) | |
3090 | return local; | |
3091 | } | |
3092 | } | |
3093 | return NULL; | |
3094 | } | |
3095 | ||
3096 | static inline int | |
3097 | nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) | |
3098 | { | |
f9d7562f | 3099 | return fhp->fh_dentry->d_inode != stp->st_file->fi_inode; |
1da177e4 LT |
3100 | } |
3101 | ||
3102 | static int | |
3103 | STALE_STATEID(stateid_t *stateid) | |
3104 | { | |
e4e83ea4 BF |
3105 | if (stateid->si_boot == boot_time) |
3106 | return 0; | |
3107 | dprintk("NFSD: stale stateid " STATEID_FMT "!\n", | |
8c10cbdb | 3108 | STATEID_VAL(stateid)); |
e4e83ea4 | 3109 | return 1; |
1da177e4 LT |
3110 | } |
3111 | ||
3112 | static inline int | |
3113 | access_permit_read(unsigned long access_bmap) | |
3114 | { | |
3115 | return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || | |
3116 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || | |
3117 | test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); | |
3118 | } | |
3119 | ||
3120 | static inline int | |
3121 | access_permit_write(unsigned long access_bmap) | |
3122 | { | |
3123 | return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || | |
3124 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); | |
3125 | } | |
3126 | ||
3127 | static | |
b37ad28b | 3128 | __be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags) |
1da177e4 | 3129 | { |
b37ad28b | 3130 | __be32 status = nfserr_openmode; |
1da177e4 | 3131 | |
02921914 BF |
3132 | /* For lock stateid's, we test the parent open, not the lock: */ |
3133 | if (stp->st_openstp) | |
3134 | stp = stp->st_openstp; | |
1da177e4 LT |
3135 | if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) |
3136 | goto out; | |
3137 | if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) | |
3138 | goto out; | |
3139 | status = nfs_ok; | |
3140 | out: | |
3141 | return status; | |
3142 | } | |
3143 | ||
b37ad28b | 3144 | static inline __be32 |
1da177e4 LT |
3145 | check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) |
3146 | { | |
203a8c8e | 3147 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 3148 | return nfs_ok; |
af558e33 | 3149 | else if (locks_in_grace()) { |
25985edc | 3150 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
3151 | * conflicting state; so we must wait out the grace period. */ |
3152 | return nfserr_grace; | |
3153 | } else if (flags & WR_STATE) | |
3154 | return nfs4_share_conflict(current_fh, | |
3155 | NFS4_SHARE_DENY_WRITE); | |
3156 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
3157 | return nfs4_share_conflict(current_fh, | |
3158 | NFS4_SHARE_DENY_READ); | |
3159 | } | |
3160 | ||
3161 | /* | |
3162 | * Allow READ/WRITE during grace period on recovered state only for files | |
3163 | * that are not able to provide mandatory locking. | |
3164 | */ | |
3165 | static inline int | |
18f82731 | 3166 | grace_disallows_io(struct inode *inode) |
1da177e4 | 3167 | { |
203a8c8e | 3168 | return locks_in_grace() && mandatory_lock(inode); |
1da177e4 LT |
3169 | } |
3170 | ||
81b82965 BF |
3171 | /* Returns true iff a is later than b: */ |
3172 | static bool stateid_generation_after(stateid_t *a, stateid_t *b) | |
3173 | { | |
3174 | return (s32)a->si_generation - (s32)b->si_generation > 0; | |
3175 | } | |
3176 | ||
28dde241 | 3177 | static int check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 3178 | { |
6668958f AA |
3179 | /* |
3180 | * When sessions are used the stateid generation number is ignored | |
3181 | * when it is zero. | |
3182 | */ | |
28dde241 | 3183 | if (has_session && in->si_generation == 0) |
81b82965 BF |
3184 | return nfs_ok; |
3185 | ||
3186 | if (in->si_generation == ref->si_generation) | |
3187 | return nfs_ok; | |
6668958f | 3188 | |
0836f587 | 3189 | /* If the client sends us a stateid from the future, it's buggy: */ |
81b82965 | 3190 | if (stateid_generation_after(in, ref)) |
0836f587 BF |
3191 | return nfserr_bad_stateid; |
3192 | /* | |
81b82965 BF |
3193 | * However, we could see a stateid from the past, even from a |
3194 | * non-buggy client. For example, if the client sends a lock | |
3195 | * while some IO is outstanding, the lock may bump si_generation | |
3196 | * while the IO is still in flight. The client could avoid that | |
3197 | * situation by waiting for responses on all the IO requests, | |
3198 | * but better performance may result in retrying IO that | |
3199 | * receives an old_stateid error if requests are rarely | |
3200 | * reordered in flight: | |
0836f587 | 3201 | */ |
81b82965 | 3202 | return nfserr_old_stateid; |
0836f587 BF |
3203 | } |
3204 | ||
3e633079 BF |
3205 | static int is_delegation_stateid(stateid_t *stateid) |
3206 | { | |
3207 | return stateid->si_fileid == 0; | |
3208 | } | |
3209 | ||
28dde241 | 3210 | __be32 nfs4_validate_stateid(stateid_t *stateid, bool has_session) |
17456804 BS |
3211 | { |
3212 | struct nfs4_stateid *stp = NULL; | |
3213 | __be32 status = nfserr_stale_stateid; | |
3214 | ||
3215 | if (STALE_STATEID(stateid)) | |
3216 | goto out; | |
3217 | ||
3218 | status = nfserr_expired; | |
b79abadd | 3219 | stp = find_stateid(stateid, 0); |
17456804 BS |
3220 | if (!stp) |
3221 | goto out; | |
3222 | status = nfserr_bad_stateid; | |
3223 | ||
3224 | if (!stp->st_stateowner->so_confirmed) | |
3225 | goto out; | |
3226 | ||
28dde241 | 3227 | status = check_stateid_generation(stateid, &stp->st_stateid, has_session); |
17456804 BS |
3228 | if (status) |
3229 | goto out; | |
3230 | ||
3231 | status = nfs_ok; | |
3232 | out: | |
3233 | return status; | |
3234 | } | |
3235 | ||
1da177e4 LT |
3236 | /* |
3237 | * Checks for stateid operations | |
3238 | */ | |
b37ad28b | 3239 | __be32 |
dd453dfd BH |
3240 | nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, |
3241 | stateid_t *stateid, int flags, struct file **filpp) | |
1da177e4 LT |
3242 | { |
3243 | struct nfs4_stateid *stp = NULL; | |
3244 | struct nfs4_delegation *dp = NULL; | |
dd453dfd | 3245 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 3246 | struct inode *ino = current_fh->fh_dentry->d_inode; |
b37ad28b | 3247 | __be32 status; |
1da177e4 | 3248 | |
1da177e4 LT |
3249 | if (filpp) |
3250 | *filpp = NULL; | |
3251 | ||
18f82731 | 3252 | if (grace_disallows_io(ino)) |
1da177e4 LT |
3253 | return nfserr_grace; |
3254 | ||
3255 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3256 | return check_special_stateids(current_fh, stateid, flags); | |
3257 | ||
1da177e4 LT |
3258 | status = nfserr_stale_stateid; |
3259 | if (STALE_STATEID(stateid)) | |
3260 | goto out; | |
3261 | ||
33515142 BF |
3262 | /* |
3263 | * We assume that any stateid that has the current boot time, | |
3264 | * but that we can't find, is expired: | |
3265 | */ | |
3266 | status = nfserr_expired; | |
3e633079 | 3267 | if (is_delegation_stateid(stateid)) { |
a4455be0 | 3268 | dp = find_delegation_stateid(ino, stateid); |
e4e83ea4 | 3269 | if (!dp) |
1da177e4 | 3270 | goto out; |
28dde241 | 3271 | status = check_stateid_generation(stateid, &dp->dl_stateid, nfsd4_has_session(cstate)); |
0c2a498f BF |
3272 | if (status) |
3273 | goto out; | |
dc9bf700 BF |
3274 | status = nfs4_check_delegmode(dp, flags); |
3275 | if (status) | |
3276 | goto out; | |
3277 | renew_client(dp->dl_client); | |
43b0178e | 3278 | if (filpp) { |
acfdf5c3 | 3279 | *filpp = dp->dl_file->fi_deleg_file; |
43b0178e DC |
3280 | BUG_ON(!*filpp); |
3281 | } | |
1da177e4 | 3282 | } else { /* open or lock stateid */ |
a4455be0 | 3283 | stp = find_stateid(stateid, flags); |
e4e83ea4 | 3284 | if (!stp) |
1da177e4 | 3285 | goto out; |
33515142 | 3286 | status = nfserr_bad_stateid; |
6150ef0d | 3287 | if (nfs4_check_fh(current_fh, stp)) |
1da177e4 LT |
3288 | goto out; |
3289 | if (!stp->st_stateowner->so_confirmed) | |
3290 | goto out; | |
6668958f | 3291 | status = check_stateid_generation(stateid, &stp->st_stateid, |
28dde241 | 3292 | nfsd4_has_session(cstate)); |
0c2a498f BF |
3293 | if (status) |
3294 | goto out; | |
a4455be0 BF |
3295 | status = nfs4_check_openmode(stp, flags); |
3296 | if (status) | |
1da177e4 LT |
3297 | goto out; |
3298 | renew_client(stp->st_stateowner->so_client); | |
f9d7562f BF |
3299 | if (filpp) { |
3300 | if (flags & RD_STATE) | |
3301 | *filpp = find_readable_file(stp->st_file); | |
3302 | else | |
3303 | *filpp = find_writeable_file(stp->st_file); | |
f9d7562f | 3304 | } |
1da177e4 LT |
3305 | } |
3306 | status = nfs_ok; | |
3307 | out: | |
3308 | return status; | |
3309 | } | |
3310 | ||
e1ca12df BS |
3311 | static __be32 |
3312 | nfsd4_free_delegation_stateid(stateid_t *stateid) | |
3313 | { | |
3314 | struct nfs4_delegation *dp = search_for_delegation(stateid); | |
3315 | if (dp) | |
3316 | return nfserr_locks_held; | |
3317 | return nfserr_bad_stateid; | |
3318 | } | |
3319 | ||
3320 | static __be32 | |
3321 | nfsd4_free_lock_stateid(struct nfs4_stateid *stp) | |
3322 | { | |
3323 | if (check_for_locks(stp->st_file, stp->st_stateowner)) | |
3324 | return nfserr_locks_held; | |
3325 | release_lock_stateid(stp); | |
3326 | return nfs_ok; | |
3327 | } | |
3328 | ||
17456804 BS |
3329 | /* |
3330 | * Test if the stateid is valid | |
3331 | */ | |
3332 | __be32 | |
3333 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3334 | struct nfsd4_test_stateid *test_stateid) | |
3335 | { | |
3336 | test_stateid->ts_has_session = nfsd4_has_session(cstate); | |
3337 | return nfs_ok; | |
3338 | } | |
3339 | ||
e1ca12df BS |
3340 | /* |
3341 | * Free a state id | |
3342 | */ | |
3343 | __be32 | |
3344 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3345 | struct nfsd4_free_stateid *free_stateid) | |
3346 | { | |
3347 | stateid_t *stateid = &free_stateid->fr_stateid; | |
3348 | struct nfs4_stateid *stp; | |
3349 | __be32 ret; | |
3350 | ||
3351 | nfs4_lock_state(); | |
3352 | if (is_delegation_stateid(stateid)) { | |
3353 | ret = nfsd4_free_delegation_stateid(stateid); | |
3354 | goto out; | |
3355 | } | |
3356 | ||
b79abadd | 3357 | stp = find_stateid(stateid, 0); |
e1ca12df BS |
3358 | if (!stp) { |
3359 | ret = nfserr_bad_stateid; | |
3360 | goto out; | |
3361 | } | |
81b82965 BF |
3362 | ret = check_stateid_generation(stateid, &stp->st_stateid, 1); |
3363 | if (ret) | |
3364 | goto out; | |
e1ca12df | 3365 | |
5fa0bbb4 | 3366 | if (stp->st_type == NFS4_OPEN_STID) { |
e1ca12df BS |
3367 | ret = nfserr_locks_held; |
3368 | goto out; | |
3369 | } else { | |
3370 | ret = nfsd4_free_lock_stateid(stp); | |
3371 | goto out; | |
3372 | } | |
3373 | ||
3374 | out: | |
3375 | nfs4_unlock_state(); | |
3376 | return ret; | |
3377 | } | |
3378 | ||
4c4cd222 N |
3379 | static inline int |
3380 | setlkflg (int type) | |
3381 | { | |
3382 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
3383 | RD_STATE : WR_STATE; | |
3384 | } | |
1da177e4 LT |
3385 | |
3386 | /* | |
3387 | * Checks for sequence id mutating operations. | |
3388 | */ | |
b37ad28b | 3389 | static __be32 |
dd453dfd BH |
3390 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
3391 | stateid_t *stateid, int flags, | |
3392 | struct nfs4_stateowner **sopp, | |
b34f27aa | 3393 | struct nfs4_stateid **stpp) |
1da177e4 | 3394 | { |
1da177e4 LT |
3395 | struct nfs4_stateid *stp; |
3396 | struct nfs4_stateowner *sop; | |
dd453dfd | 3397 | struct svc_fh *current_fh = &cstate->current_fh; |
0836f587 | 3398 | __be32 status; |
1da177e4 | 3399 | |
8c10cbdb BH |
3400 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
3401 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 3402 | |
1da177e4 LT |
3403 | *stpp = NULL; |
3404 | *sopp = NULL; | |
3405 | ||
1da177e4 | 3406 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { |
2fdada03 | 3407 | dprintk("NFSD: preprocess_seqid_op: magic stateid!\n"); |
3a4f98bb | 3408 | return nfserr_bad_stateid; |
1da177e4 LT |
3409 | } |
3410 | ||
1da177e4 | 3411 | if (STALE_STATEID(stateid)) |
3a4f98bb | 3412 | return nfserr_stale_stateid; |
6668958f | 3413 | |
1da177e4 LT |
3414 | /* |
3415 | * We return BAD_STATEID if filehandle doesn't match stateid, | |
3416 | * the confirmed flag is incorrecly set, or the generation | |
3417 | * number is incorrect. | |
1da177e4 | 3418 | */ |
f8816512 N |
3419 | stp = find_stateid(stateid, flags); |
3420 | if (stp == NULL) { | |
3421 | /* | |
3422 | * Also, we should make sure this isn't just the result of | |
3423 | * a replayed close: | |
3424 | */ | |
3425 | sop = search_close_lru(stateid->si_stateownerid, flags); | |
33515142 | 3426 | /* It's not stale; let's assume it's expired: */ |
f8816512 | 3427 | if (sop == NULL) |
33515142 | 3428 | return nfserr_expired; |
f8816512 N |
3429 | *sopp = sop; |
3430 | goto check_replay; | |
3431 | } | |
1da177e4 | 3432 | |
39325bd0 BF |
3433 | *stpp = stp; |
3434 | *sopp = sop = stp->st_stateowner; | |
3435 | ||
f3362737 | 3436 | if (nfs4_check_fh(current_fh, stp)) { |
2fdada03 | 3437 | dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); |
3a4f98bb | 3438 | return nfserr_bad_stateid; |
1da177e4 LT |
3439 | } |
3440 | ||
28dde241 | 3441 | if (!nfsd4_has_session(cstate) && seqid != sop->so_seqid) |
1da177e4 LT |
3442 | goto check_replay; |
3443 | ||
3a4f98bb | 3444 | if (sop->so_confirmed && flags & CONFIRM) { |
2fdada03 | 3445 | dprintk("NFSD: preprocess_seqid_op: expected" |
3a4f98bb N |
3446 | " unconfirmed stateowner!\n"); |
3447 | return nfserr_bad_stateid; | |
1da177e4 | 3448 | } |
3a4f98bb | 3449 | if (!sop->so_confirmed && !(flags & CONFIRM)) { |
2fdada03 | 3450 | dprintk("NFSD: preprocess_seqid_op: stateowner not" |
3a4f98bb N |
3451 | " confirmed yet!\n"); |
3452 | return nfserr_bad_stateid; | |
1da177e4 | 3453 | } |
28dde241 | 3454 | status = check_stateid_generation(stateid, &stp->st_stateid, nfsd4_has_session(cstate)); |
0836f587 BF |
3455 | if (status) |
3456 | return status; | |
52fd004e | 3457 | renew_client(sop->so_client); |
3a4f98bb | 3458 | return nfs_ok; |
1da177e4 | 3459 | |
1da177e4 | 3460 | check_replay: |
bd9aac52 | 3461 | if (seqid == sop->so_seqid - 1) { |
849823c5 | 3462 | dprintk("NFSD: preprocess_seqid_op: retransmission?\n"); |
1da177e4 | 3463 | /* indicate replay to calling function */ |
a90b061c | 3464 | return nfserr_replay_me; |
1da177e4 | 3465 | } |
2fdada03 | 3466 | dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n", |
3a4f98bb N |
3467 | sop->so_seqid, seqid); |
3468 | *sopp = NULL; | |
3469 | return nfserr_bad_seqid; | |
1da177e4 LT |
3470 | } |
3471 | ||
b37ad28b | 3472 | __be32 |
ca364317 | 3473 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3474 | struct nfsd4_open_confirm *oc) |
1da177e4 | 3475 | { |
b37ad28b | 3476 | __be32 status; |
1da177e4 LT |
3477 | struct nfs4_stateowner *sop; |
3478 | struct nfs4_stateid *stp; | |
3479 | ||
3480 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | |
ca364317 BF |
3481 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3482 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3483 | |
ca364317 | 3484 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
3485 | if (status) |
3486 | return status; | |
1da177e4 LT |
3487 | |
3488 | nfs4_lock_state(); | |
3489 | ||
dd453dfd | 3490 | if ((status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3491 | oc->oc_seqid, &oc->oc_req_stateid, |
f3362737 | 3492 | CONFIRM | OPEN_STATE, |
b34f27aa | 3493 | &oc->oc_stateowner, &stp))) |
1da177e4 LT |
3494 | goto out; |
3495 | ||
3496 | sop = oc->oc_stateowner; | |
3497 | sop->so_confirmed = 1; | |
3498 | update_stateid(&stp->st_stateid); | |
3499 | memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
8c10cbdb BH |
3500 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
3501 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stateid)); | |
c7b9a459 N |
3502 | |
3503 | nfsd4_create_clid_dir(sop->so_client); | |
1da177e4 | 3504 | out: |
f2327d9a | 3505 | if (oc->oc_stateowner) { |
1da177e4 | 3506 | nfs4_get_stateowner(oc->oc_stateowner); |
a4f1706a | 3507 | cstate->replay_owner = oc->oc_stateowner; |
f2327d9a | 3508 | } |
1da177e4 LT |
3509 | nfs4_unlock_state(); |
3510 | return status; | |
3511 | } | |
3512 | ||
f197c271 | 3513 | static inline void nfs4_file_downgrade(struct nfs4_stateid *stp, unsigned int to_access) |
1da177e4 LT |
3514 | { |
3515 | int i; | |
f197c271 | 3516 | |
1da177e4 | 3517 | for (i = 1; i < 4; i++) { |
f197c271 BF |
3518 | if (test_bit(i, &stp->st_access_bmap) && !(i & to_access)) { |
3519 | nfs4_file_put_access(stp->st_file, i); | |
3520 | __clear_bit(i, &stp->st_access_bmap); | |
3521 | } | |
1da177e4 LT |
3522 | } |
3523 | } | |
3524 | ||
3525 | static void | |
3526 | reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) | |
3527 | { | |
3528 | int i; | |
3529 | for (i = 0; i < 4; i++) { | |
3530 | if ((i & deny) != i) | |
3531 | __clear_bit(i, bmap); | |
3532 | } | |
3533 | } | |
3534 | ||
b37ad28b | 3535 | __be32 |
ca364317 BF |
3536 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
3537 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 3538 | struct nfsd4_open_downgrade *od) |
1da177e4 | 3539 | { |
b37ad28b | 3540 | __be32 status; |
1da177e4 | 3541 | struct nfs4_stateid *stp; |
1da177e4 LT |
3542 | |
3543 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | |
ca364317 BF |
3544 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3545 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3546 | |
d87a8ade | 3547 | if (!access_valid(od->od_share_access, cstate->minorversion) |
ba5a6a19 | 3548 | || !deny_valid(od->od_share_deny)) |
1da177e4 LT |
3549 | return nfserr_inval; |
3550 | ||
3551 | nfs4_lock_state(); | |
dd453dfd | 3552 | if ((status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3553 | od->od_seqid, |
1da177e4 | 3554 | &od->od_stateid, |
f3362737 | 3555 | OPEN_STATE, |
b34f27aa | 3556 | &od->od_stateowner, &stp))) |
1da177e4 LT |
3557 | goto out; |
3558 | ||
3559 | status = nfserr_inval; | |
3560 | if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { | |
3561 | dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
3562 | stp->st_access_bmap, od->od_share_access); | |
3563 | goto out; | |
3564 | } | |
3565 | if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { | |
3566 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", | |
3567 | stp->st_deny_bmap, od->od_share_deny); | |
3568 | goto out; | |
3569 | } | |
f197c271 | 3570 | nfs4_file_downgrade(stp, od->od_share_access); |
1da177e4 | 3571 | |
1da177e4 LT |
3572 | reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); |
3573 | ||
3574 | update_stateid(&stp->st_stateid); | |
3575 | memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
3576 | status = nfs_ok; | |
3577 | out: | |
f2327d9a | 3578 | if (od->od_stateowner) { |
1da177e4 | 3579 | nfs4_get_stateowner(od->od_stateowner); |
a4f1706a | 3580 | cstate->replay_owner = od->od_stateowner; |
f2327d9a | 3581 | } |
1da177e4 LT |
3582 | nfs4_unlock_state(); |
3583 | return status; | |
3584 | } | |
3585 | ||
3586 | /* | |
3587 | * nfs4_unlock_state() called after encode | |
3588 | */ | |
b37ad28b | 3589 | __be32 |
ca364317 | 3590 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3591 | struct nfsd4_close *close) |
1da177e4 | 3592 | { |
b37ad28b | 3593 | __be32 status; |
1da177e4 LT |
3594 | struct nfs4_stateid *stp; |
3595 | ||
3596 | dprintk("NFSD: nfsd4_close on file %.*s\n", | |
ca364317 BF |
3597 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3598 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 LT |
3599 | |
3600 | nfs4_lock_state(); | |
3601 | /* check close_lru for replay */ | |
dd453dfd | 3602 | if ((status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3603 | close->cl_seqid, |
1da177e4 | 3604 | &close->cl_stateid, |
f3362737 | 3605 | OPEN_STATE | CLOSE_STATE, |
b34f27aa | 3606 | &close->cl_stateowner, &stp))) |
1da177e4 | 3607 | goto out; |
1da177e4 LT |
3608 | status = nfs_ok; |
3609 | update_stateid(&stp->st_stateid); | |
3610 | memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
3611 | ||
04ef5954 | 3612 | /* release_stateid() calls nfsd_close() if needed */ |
2283963f | 3613 | release_open_stateid(stp); |
04ef5954 BF |
3614 | |
3615 | /* place unused nfs4_stateowners on so_close_lru list to be | |
3616 | * released by the laundromat service after the lease period | |
3617 | * to enable us to handle CLOSE replay | |
3618 | */ | |
3619 | if (list_empty(&close->cl_stateowner->so_stateids)) | |
3620 | move_to_close_lru(close->cl_stateowner); | |
1da177e4 | 3621 | out: |
f2327d9a | 3622 | if (close->cl_stateowner) { |
1da177e4 | 3623 | nfs4_get_stateowner(close->cl_stateowner); |
a4f1706a | 3624 | cstate->replay_owner = close->cl_stateowner; |
f2327d9a | 3625 | } |
1da177e4 LT |
3626 | nfs4_unlock_state(); |
3627 | return status; | |
3628 | } | |
3629 | ||
b37ad28b | 3630 | __be32 |
ca364317 BF |
3631 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3632 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 3633 | { |
203a8c8e BF |
3634 | struct nfs4_delegation *dp; |
3635 | stateid_t *stateid = &dr->dr_stateid; | |
3636 | struct inode *inode; | |
b37ad28b | 3637 | __be32 status; |
1da177e4 | 3638 | |
ca364317 | 3639 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e BF |
3640 | return status; |
3641 | inode = cstate->current_fh.fh_dentry->d_inode; | |
1da177e4 LT |
3642 | |
3643 | nfs4_lock_state(); | |
203a8c8e BF |
3644 | status = nfserr_bad_stateid; |
3645 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3646 | goto out; | |
3647 | status = nfserr_stale_stateid; | |
3648 | if (STALE_STATEID(stateid)) | |
3649 | goto out; | |
7e0f7cf5 | 3650 | status = nfserr_bad_stateid; |
203a8c8e BF |
3651 | if (!is_delegation_stateid(stateid)) |
3652 | goto out; | |
33515142 | 3653 | status = nfserr_expired; |
203a8c8e | 3654 | dp = find_delegation_stateid(inode, stateid); |
e4e83ea4 | 3655 | if (!dp) |
203a8c8e | 3656 | goto out; |
28dde241 | 3657 | status = check_stateid_generation(stateid, &dp->dl_stateid, nfsd4_has_session(cstate)); |
203a8c8e BF |
3658 | if (status) |
3659 | goto out; | |
3660 | renew_client(dp->dl_client); | |
3661 | ||
3662 | unhash_delegation(dp); | |
1da177e4 | 3663 | out: |
203a8c8e BF |
3664 | nfs4_unlock_state(); |
3665 | ||
1da177e4 LT |
3666 | return status; |
3667 | } | |
3668 | ||
3669 | ||
3670 | /* | |
3671 | * Lock owner state (byte-range locks) | |
3672 | */ | |
3673 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) | |
3674 | #define LOCK_HASH_BITS 8 | |
3675 | #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) | |
3676 | #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) | |
3677 | ||
87df4de8 BH |
3678 | static inline u64 |
3679 | end_offset(u64 start, u64 len) | |
3680 | { | |
3681 | u64 end; | |
3682 | ||
3683 | end = start + len; | |
3684 | return end >= start ? end: NFS4_MAX_UINT64; | |
3685 | } | |
3686 | ||
3687 | /* last octet in a range */ | |
3688 | static inline u64 | |
3689 | last_byte_offset(u64 start, u64 len) | |
3690 | { | |
3691 | u64 end; | |
3692 | ||
3693 | BUG_ON(!len); | |
3694 | end = start + len; | |
3695 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
3696 | } | |
3697 | ||
ddc04c41 BF |
3698 | static unsigned int lockownerid_hashval(u32 id) |
3699 | { | |
3700 | return id & LOCK_HASH_MASK; | |
3701 | } | |
1da177e4 LT |
3702 | |
3703 | static inline unsigned int | |
3704 | lock_ownerstr_hashval(struct inode *inode, u32 cl_id, | |
3705 | struct xdr_netobj *ownername) | |
3706 | { | |
3707 | return (file_hashval(inode) + cl_id | |
3708 | + opaque_hashval(ownername->data, ownername->len)) | |
3709 | & LOCK_HASH_MASK; | |
3710 | } | |
3711 | ||
3712 | static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; | |
3713 | static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; | |
1da177e4 | 3714 | |
e1ca12df BS |
3715 | static int |
3716 | same_stateid(stateid_t *id_one, stateid_t *id_two) | |
3717 | { | |
3718 | if (id_one->si_stateownerid != id_two->si_stateownerid) | |
3719 | return 0; | |
3720 | return id_one->si_fileid == id_two->si_fileid; | |
3721 | } | |
3722 | ||
b79abadd | 3723 | static struct nfs4_stateid *find_stateid(stateid_t *t, int flags) |
1da177e4 | 3724 | { |
b79abadd | 3725 | struct nfs4_stateid *s; |
1da177e4 LT |
3726 | unsigned int hashval; |
3727 | ||
b79abadd BF |
3728 | hashval = stateid_hashval(t->si_stateownerid, t->si_fileid); |
3729 | list_for_each_entry(s, &stateid_hashtbl[hashval], st_hash) { | |
3730 | if (!same_stateid(&s->st_stateid, t)) | |
3731 | continue; | |
3732 | if (flags & LOCK_STATE && s->st_type != NFS4_LOCK_STID) | |
3733 | return NULL; | |
3734 | if (flags & OPEN_STATE && s->st_type != NFS4_OPEN_STID) | |
3735 | return NULL; | |
3736 | return s; | |
1da177e4 | 3737 | } |
e1ca12df BS |
3738 | return NULL; |
3739 | } | |
3740 | ||
3741 | static struct nfs4_delegation * | |
3742 | search_for_delegation(stateid_t *stid) | |
3743 | { | |
3744 | struct nfs4_file *fp; | |
3745 | struct nfs4_delegation *dp; | |
3746 | struct list_head *pos; | |
3747 | int i; | |
3748 | ||
3749 | for (i = 0; i < FILE_HASH_SIZE; i++) { | |
3750 | list_for_each_entry(fp, &file_hashtbl[i], fi_hash) { | |
3751 | list_for_each(pos, &fp->fi_delegations) { | |
3752 | dp = list_entry(pos, struct nfs4_delegation, dl_perfile); | |
3753 | if (same_stateid(&dp->dl_stateid, stid)) | |
3754 | return dp; | |
3755 | } | |
3756 | } | |
3757 | } | |
3758 | return NULL; | |
3759 | } | |
3760 | ||
1da177e4 LT |
3761 | static struct nfs4_delegation * |
3762 | find_delegation_stateid(struct inode *ino, stateid_t *stid) | |
3763 | { | |
13cd2184 N |
3764 | struct nfs4_file *fp; |
3765 | struct nfs4_delegation *dl; | |
1da177e4 | 3766 | |
8c10cbdb BH |
3767 | dprintk("NFSD: %s: stateid=" STATEID_FMT "\n", __func__, |
3768 | STATEID_VAL(stid)); | |
1da177e4 | 3769 | |
1da177e4 | 3770 | fp = find_file(ino); |
13cd2184 N |
3771 | if (!fp) |
3772 | return NULL; | |
3773 | dl = find_delegation_file(fp, stid); | |
3774 | put_nfs4_file(fp); | |
3775 | return dl; | |
1da177e4 LT |
3776 | } |
3777 | ||
3778 | /* | |
3779 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
3780 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
3781 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
3782 | * locking, this prevents us from being completely protocol-compliant. The | |
3783 | * real solution to this problem is to start using unsigned file offsets in | |
3784 | * the VFS, but this is a very deep change! | |
3785 | */ | |
3786 | static inline void | |
3787 | nfs4_transform_lock_offset(struct file_lock *lock) | |
3788 | { | |
3789 | if (lock->fl_start < 0) | |
3790 | lock->fl_start = OFFSET_MAX; | |
3791 | if (lock->fl_end < 0) | |
3792 | lock->fl_end = OFFSET_MAX; | |
3793 | } | |
3794 | ||
d5b9026a N |
3795 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
3796 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 3797 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 3798 | }; |
1da177e4 LT |
3799 | |
3800 | static inline void | |
3801 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
3802 | { | |
d5b9026a | 3803 | struct nfs4_stateowner *sop; |
1da177e4 | 3804 | |
d5b9026a N |
3805 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
3806 | sop = (struct nfs4_stateowner *) fl->fl_owner; | |
1da177e4 LT |
3807 | kref_get(&sop->so_ref); |
3808 | deny->ld_sop = sop; | |
3809 | deny->ld_clientid = sop->so_client->cl_clientid; | |
d5b9026a N |
3810 | } else { |
3811 | deny->ld_sop = NULL; | |
3812 | deny->ld_clientid.cl_boot = 0; | |
3813 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
3814 | } |
3815 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
3816 | deny->ld_length = NFS4_MAX_UINT64; |
3817 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
3818 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
3819 | deny->ld_type = NFS4_READ_LT; | |
3820 | if (fl->fl_type != F_RDLCK) | |
3821 | deny->ld_type = NFS4_WRITE_LT; | |
3822 | } | |
3823 | ||
1da177e4 LT |
3824 | static struct nfs4_stateowner * |
3825 | find_lockstateowner_str(struct inode *inode, clientid_t *clid, | |
3826 | struct xdr_netobj *owner) | |
3827 | { | |
3828 | unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); | |
3829 | struct nfs4_stateowner *op; | |
3830 | ||
3831 | list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { | |
599e0a22 | 3832 | if (same_owner_str(op, owner, clid)) |
1da177e4 LT |
3833 | return op; |
3834 | } | |
3835 | return NULL; | |
3836 | } | |
3837 | ||
ff194bd9 BF |
3838 | static void hash_lockowner(struct nfs4_stateowner *sop, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp) |
3839 | { | |
3840 | unsigned int idhashval; | |
3841 | ||
3842 | idhashval = lockownerid_hashval(sop->so_id); | |
3843 | list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); | |
3844 | list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); | |
3845 | list_add(&sop->so_perstateid, &open_stp->st_lockowners); | |
3846 | } | |
3847 | ||
1da177e4 LT |
3848 | /* |
3849 | * Alloc a lock owner structure. | |
3850 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 3851 | * occurred. |
1da177e4 LT |
3852 | * |
3853 | * strhashval = lock_ownerstr_hashval | |
1da177e4 LT |
3854 | */ |
3855 | ||
3856 | static struct nfs4_stateowner * | |
3857 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { | |
3858 | struct nfs4_stateowner *sop; | |
1da177e4 | 3859 | |
ff194bd9 BF |
3860 | sop = alloc_stateowner(&lock->lk_new_owner, clp); |
3861 | if (!sop) | |
1da177e4 | 3862 | return NULL; |
ea1da636 | 3863 | INIT_LIST_HEAD(&sop->so_stateids); |
1da177e4 | 3864 | sop->so_is_open_owner = 0; |
b59e3c0e NB |
3865 | /* It is the openowner seqid that will be incremented in encode in the |
3866 | * case of new lockowners; so increment the lock seqid manually: */ | |
3867 | sop->so_seqid = lock->lk_new_lock_seqid + 1; | |
1da177e4 | 3868 | sop->so_confirmed = 1; |
ff194bd9 | 3869 | hash_lockowner(sop, strhashval, clp, open_stp); |
1da177e4 LT |
3870 | return sop; |
3871 | } | |
3872 | ||
fd39ca9a | 3873 | static struct nfs4_stateid * |
1da177e4 LT |
3874 | alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) |
3875 | { | |
3876 | struct nfs4_stateid *stp; | |
3877 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); | |
3878 | ||
5ac049ac N |
3879 | stp = nfs4_alloc_stateid(); |
3880 | if (stp == NULL) | |
1da177e4 LT |
3881 | goto out; |
3882 | INIT_LIST_HEAD(&stp->st_hash); | |
3883 | INIT_LIST_HEAD(&stp->st_perfile); | |
ea1da636 N |
3884 | INIT_LIST_HEAD(&stp->st_perstateowner); |
3885 | INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ | |
b79abadd | 3886 | list_add(&stp->st_hash, &stateid_hashtbl[hashval]); |
8beefa24 | 3887 | list_add(&stp->st_perfile, &fp->fi_stateids); |
ea1da636 | 3888 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
1da177e4 | 3889 | stp->st_stateowner = sop; |
5fa0bbb4 | 3890 | stp->st_type = NFS4_LOCK_STID; |
13cd2184 | 3891 | get_nfs4_file(fp); |
1da177e4 | 3892 | stp->st_file = fp; |
e4e83ea4 | 3893 | stp->st_stateid.si_boot = boot_time; |
1da177e4 LT |
3894 | stp->st_stateid.si_stateownerid = sop->so_id; |
3895 | stp->st_stateid.si_fileid = fp->fi_id; | |
3896 | stp->st_stateid.si_generation = 0; | |
0997b173 | 3897 | stp->st_access_bmap = 0; |
1da177e4 | 3898 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 3899 | stp->st_openstp = open_stp; |
1da177e4 LT |
3900 | |
3901 | out: | |
3902 | return stp; | |
3903 | } | |
3904 | ||
fd39ca9a | 3905 | static int |
1da177e4 LT |
3906 | check_lock_length(u64 offset, u64 length) |
3907 | { | |
87df4de8 | 3908 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
3909 | LOFF_OVERFLOW(offset, length))); |
3910 | } | |
3911 | ||
0997b173 BF |
3912 | static void get_lock_access(struct nfs4_stateid *lock_stp, u32 access) |
3913 | { | |
3914 | struct nfs4_file *fp = lock_stp->st_file; | |
3915 | int oflag = nfs4_access_to_omode(access); | |
3916 | ||
3917 | if (test_bit(access, &lock_stp->st_access_bmap)) | |
3918 | return; | |
3919 | nfs4_file_get_access(fp, oflag); | |
3920 | __set_bit(access, &lock_stp->st_access_bmap); | |
3921 | } | |
3922 | ||
1da177e4 LT |
3923 | /* |
3924 | * LOCK operation | |
3925 | */ | |
b37ad28b | 3926 | __be32 |
ca364317 | 3927 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3928 | struct nfsd4_lock *lock) |
1da177e4 | 3929 | { |
3e9e3dbe | 3930 | struct nfs4_stateowner *open_sop = NULL; |
b59e3c0e | 3931 | struct nfs4_stateowner *lock_sop = NULL; |
1da177e4 | 3932 | struct nfs4_stateid *lock_stp; |
7d947842 BF |
3933 | struct nfs4_file *fp; |
3934 | struct file *filp = NULL; | |
1da177e4 | 3935 | struct file_lock file_lock; |
8dc7c311 | 3936 | struct file_lock conflock; |
b37ad28b | 3937 | __be32 status = 0; |
1da177e4 | 3938 | unsigned int strhashval; |
b34f27aa | 3939 | int lkflg; |
b8dd7b9a | 3940 | int err; |
1da177e4 LT |
3941 | |
3942 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
3943 | (long long) lock->lk_offset, | |
3944 | (long long) lock->lk_length); | |
3945 | ||
1da177e4 LT |
3946 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
3947 | return nfserr_inval; | |
3948 | ||
ca364317 | 3949 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 3950 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
3951 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
3952 | return status; | |
3953 | } | |
3954 | ||
1da177e4 LT |
3955 | nfs4_lock_state(); |
3956 | ||
3957 | if (lock->lk_is_new) { | |
893f8770 N |
3958 | /* |
3959 | * Client indicates that this is a new lockowner. | |
3960 | * Use open owner and open stateid to create lock owner and | |
3961 | * lock stateid. | |
3962 | */ | |
1da177e4 | 3963 | struct nfs4_stateid *open_stp = NULL; |
1da177e4 LT |
3964 | |
3965 | status = nfserr_stale_clientid; | |
60adfc50 AA |
3966 | if (!nfsd4_has_session(cstate) && |
3967 | STALE_CLIENTID(&lock->lk_new_clientid)) | |
1da177e4 | 3968 | goto out; |
1da177e4 | 3969 | |
1da177e4 | 3970 | /* validate and update open stateid and open seqid */ |
dd453dfd | 3971 | status = nfs4_preprocess_seqid_op(cstate, |
1da177e4 LT |
3972 | lock->lk_new_open_seqid, |
3973 | &lock->lk_new_open_stateid, | |
f3362737 | 3974 | OPEN_STATE, |
b34f27aa | 3975 | &lock->lk_replay_owner, &open_stp); |
37515177 | 3976 | if (status) |
1da177e4 | 3977 | goto out; |
b34f27aa | 3978 | status = nfserr_bad_stateid; |
3a65588a | 3979 | open_sop = lock->lk_replay_owner; |
b34f27aa BF |
3980 | if (!nfsd4_has_session(cstate) && |
3981 | !same_clid(&open_sop->so_client->cl_clientid, | |
3982 | &lock->v.new.clientid)) | |
3983 | goto out; | |
1da177e4 LT |
3984 | /* create lockowner and lock stateid */ |
3985 | fp = open_stp->st_file; | |
3986 | strhashval = lock_ownerstr_hashval(fp->fi_inode, | |
3987 | open_sop->so_client->cl_clientid.cl_id, | |
3988 | &lock->v.new.owner); | |
3e9e3dbe N |
3989 | /* XXX: Do we need to check for duplicate stateowners on |
3990 | * the same file, or should they just be allowed (and | |
3991 | * create new stateids)? */ | |
3e772463 | 3992 | status = nfserr_jukebox; |
b59e3c0e NB |
3993 | lock_sop = alloc_init_lock_stateowner(strhashval, |
3994 | open_sop->so_client, open_stp, lock); | |
3995 | if (lock_sop == NULL) | |
1da177e4 | 3996 | goto out; |
b59e3c0e | 3997 | lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); |
8a280510 | 3998 | if (lock_stp == NULL) |
1da177e4 | 3999 | goto out; |
1da177e4 LT |
4000 | } else { |
4001 | /* lock (lock owner + lock stateid) already exists */ | |
dd453dfd | 4002 | status = nfs4_preprocess_seqid_op(cstate, |
1da177e4 LT |
4003 | lock->lk_old_lock_seqid, |
4004 | &lock->lk_old_lock_stateid, | |
f3362737 | 4005 | LOCK_STATE, |
b34f27aa | 4006 | &lock->lk_replay_owner, &lock_stp); |
1da177e4 LT |
4007 | if (status) |
4008 | goto out; | |
3a65588a | 4009 | lock_sop = lock->lk_replay_owner; |
7d947842 | 4010 | fp = lock_stp->st_file; |
1da177e4 | 4011 | } |
3a65588a | 4012 | /* lock->lk_replay_owner and lock_stp have been created or found */ |
1da177e4 | 4013 | |
b34f27aa BF |
4014 | lkflg = setlkflg(lock->lk_type); |
4015 | status = nfs4_check_openmode(lock_stp, lkflg); | |
4016 | if (status) | |
4017 | goto out; | |
4018 | ||
0dd395dc | 4019 | status = nfserr_grace; |
af558e33 | 4020 | if (locks_in_grace() && !lock->lk_reclaim) |
0dd395dc N |
4021 | goto out; |
4022 | status = nfserr_no_grace; | |
af558e33 | 4023 | if (!locks_in_grace() && lock->lk_reclaim) |
0dd395dc N |
4024 | goto out; |
4025 | ||
1da177e4 LT |
4026 | locks_init_lock(&file_lock); |
4027 | switch (lock->lk_type) { | |
4028 | case NFS4_READ_LT: | |
4029 | case NFS4_READW_LT: | |
0997b173 BF |
4030 | filp = find_readable_file(lock_stp->st_file); |
4031 | if (filp) | |
4032 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
1da177e4 | 4033 | file_lock.fl_type = F_RDLCK; |
529d7b2a | 4034 | break; |
1da177e4 LT |
4035 | case NFS4_WRITE_LT: |
4036 | case NFS4_WRITEW_LT: | |
0997b173 BF |
4037 | filp = find_writeable_file(lock_stp->st_file); |
4038 | if (filp) | |
4039 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
1da177e4 | 4040 | file_lock.fl_type = F_WRLCK; |
529d7b2a | 4041 | break; |
1da177e4 LT |
4042 | default: |
4043 | status = nfserr_inval; | |
4044 | goto out; | |
4045 | } | |
f9d7562f BF |
4046 | if (!filp) { |
4047 | status = nfserr_openmode; | |
4048 | goto out; | |
4049 | } | |
b59e3c0e | 4050 | file_lock.fl_owner = (fl_owner_t)lock_sop; |
1da177e4 LT |
4051 | file_lock.fl_pid = current->tgid; |
4052 | file_lock.fl_file = filp; | |
4053 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 4054 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
4055 | |
4056 | file_lock.fl_start = lock->lk_offset; | |
87df4de8 | 4057 | file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); |
1da177e4 LT |
4058 | nfs4_transform_lock_offset(&file_lock); |
4059 | ||
4060 | /* | |
4061 | * Try to lock the file in the VFS. | |
4062 | * Note: locks.c uses the BKL to protect the inode's lock list. | |
4063 | */ | |
4064 | ||
529d7b2a | 4065 | err = vfs_lock_file(filp, F_SETLK, &file_lock, &conflock); |
b8dd7b9a | 4066 | switch (-err) { |
1da177e4 LT |
4067 | case 0: /* success! */ |
4068 | update_stateid(&lock_stp->st_stateid); | |
4069 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, | |
4070 | sizeof(stateid_t)); | |
b8dd7b9a | 4071 | status = 0; |
eb76b3fd AA |
4072 | break; |
4073 | case (EAGAIN): /* conflock holds conflicting lock */ | |
4074 | status = nfserr_denied; | |
4075 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
4076 | nfs4_set_lock_denied(&conflock, &lock->lk_denied); | |
4077 | break; | |
1da177e4 LT |
4078 | case (EDEADLK): |
4079 | status = nfserr_deadlock; | |
eb76b3fd | 4080 | break; |
3e772463 | 4081 | default: |
fd85b817 | 4082 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 4083 | status = nfserrno(err); |
eb76b3fd | 4084 | break; |
1da177e4 | 4085 | } |
1da177e4 | 4086 | out: |
8a280510 | 4087 | if (status && lock->lk_is_new && lock_sop) |
f044ff83 | 4088 | release_lockowner(lock_sop); |
3a65588a BF |
4089 | if (lock->lk_replay_owner) { |
4090 | nfs4_get_stateowner(lock->lk_replay_owner); | |
a4f1706a | 4091 | cstate->replay_owner = lock->lk_replay_owner; |
f2327d9a | 4092 | } |
1da177e4 LT |
4093 | nfs4_unlock_state(); |
4094 | return status; | |
4095 | } | |
4096 | ||
55ef1274 BF |
4097 | /* |
4098 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
4099 | * so we do a temporary open here just to get an open file to pass to | |
4100 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
4101 | * inode operation.) | |
4102 | */ | |
4103 | static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) | |
4104 | { | |
4105 | struct file *file; | |
4106 | int err; | |
4107 | ||
4108 | err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); | |
4109 | if (err) | |
4110 | return err; | |
4111 | err = vfs_test_lock(file, lock); | |
4112 | nfsd_close(file); | |
4113 | return err; | |
4114 | } | |
4115 | ||
1da177e4 LT |
4116 | /* |
4117 | * LOCKT operation | |
4118 | */ | |
b37ad28b | 4119 | __be32 |
ca364317 BF |
4120 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4121 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
4122 | { |
4123 | struct inode *inode; | |
1da177e4 | 4124 | struct file_lock file_lock; |
fd85b817 | 4125 | int error; |
b37ad28b | 4126 | __be32 status; |
1da177e4 | 4127 | |
af558e33 | 4128 | if (locks_in_grace()) |
1da177e4 LT |
4129 | return nfserr_grace; |
4130 | ||
4131 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
4132 | return nfserr_inval; | |
4133 | ||
4134 | lockt->lt_stateowner = NULL; | |
4135 | nfs4_lock_state(); | |
4136 | ||
4137 | status = nfserr_stale_clientid; | |
60adfc50 | 4138 | if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) |
1da177e4 | 4139 | goto out; |
1da177e4 | 4140 | |
75c096f7 | 4141 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 4142 | goto out; |
1da177e4 | 4143 | |
ca364317 | 4144 | inode = cstate->current_fh.fh_dentry->d_inode; |
1da177e4 LT |
4145 | locks_init_lock(&file_lock); |
4146 | switch (lockt->lt_type) { | |
4147 | case NFS4_READ_LT: | |
4148 | case NFS4_READW_LT: | |
4149 | file_lock.fl_type = F_RDLCK; | |
4150 | break; | |
4151 | case NFS4_WRITE_LT: | |
4152 | case NFS4_WRITEW_LT: | |
4153 | file_lock.fl_type = F_WRLCK; | |
4154 | break; | |
4155 | default: | |
2fdada03 | 4156 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
4157 | status = nfserr_inval; |
4158 | goto out; | |
4159 | } | |
4160 | ||
4161 | lockt->lt_stateowner = find_lockstateowner_str(inode, | |
4162 | &lockt->lt_clientid, &lockt->lt_owner); | |
4163 | if (lockt->lt_stateowner) | |
4164 | file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; | |
4165 | file_lock.fl_pid = current->tgid; | |
4166 | file_lock.fl_flags = FL_POSIX; | |
4167 | ||
4168 | file_lock.fl_start = lockt->lt_offset; | |
87df4de8 | 4169 | file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); |
1da177e4 LT |
4170 | |
4171 | nfs4_transform_lock_offset(&file_lock); | |
4172 | ||
1da177e4 | 4173 | status = nfs_ok; |
55ef1274 | 4174 | error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); |
fd85b817 ME |
4175 | if (error) { |
4176 | status = nfserrno(error); | |
4177 | goto out; | |
4178 | } | |
9d6a8c5c | 4179 | if (file_lock.fl_type != F_UNLCK) { |
1da177e4 | 4180 | status = nfserr_denied; |
9d6a8c5c | 4181 | nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); |
1da177e4 LT |
4182 | } |
4183 | out: | |
4184 | nfs4_unlock_state(); | |
4185 | return status; | |
4186 | } | |
4187 | ||
b37ad28b | 4188 | __be32 |
ca364317 | 4189 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4190 | struct nfsd4_locku *locku) |
1da177e4 LT |
4191 | { |
4192 | struct nfs4_stateid *stp; | |
4193 | struct file *filp = NULL; | |
4194 | struct file_lock file_lock; | |
b37ad28b | 4195 | __be32 status; |
b8dd7b9a | 4196 | int err; |
1da177e4 LT |
4197 | |
4198 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", | |
4199 | (long long) locku->lu_offset, | |
4200 | (long long) locku->lu_length); | |
4201 | ||
4202 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
4203 | return nfserr_inval; | |
4204 | ||
4205 | nfs4_lock_state(); | |
4206 | ||
dd453dfd | 4207 | if ((status = nfs4_preprocess_seqid_op(cstate, |
1da177e4 LT |
4208 | locku->lu_seqid, |
4209 | &locku->lu_stateid, | |
f3362737 | 4210 | LOCK_STATE, |
b34f27aa | 4211 | &locku->lu_stateowner, &stp))) |
1da177e4 LT |
4212 | goto out; |
4213 | ||
f9d7562f BF |
4214 | filp = find_any_file(stp->st_file); |
4215 | if (!filp) { | |
4216 | status = nfserr_lock_range; | |
4217 | goto out; | |
4218 | } | |
1da177e4 LT |
4219 | BUG_ON(!filp); |
4220 | locks_init_lock(&file_lock); | |
4221 | file_lock.fl_type = F_UNLCK; | |
4222 | file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; | |
4223 | file_lock.fl_pid = current->tgid; | |
4224 | file_lock.fl_file = filp; | |
4225 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 4226 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
4227 | file_lock.fl_start = locku->lu_offset; |
4228 | ||
87df4de8 | 4229 | file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); |
1da177e4 LT |
4230 | nfs4_transform_lock_offset(&file_lock); |
4231 | ||
4232 | /* | |
4233 | * Try to unlock the file in the VFS. | |
4234 | */ | |
fd85b817 | 4235 | err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); |
b8dd7b9a | 4236 | if (err) { |
fd85b817 | 4237 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
4238 | goto out_nfserr; |
4239 | } | |
4240 | /* | |
4241 | * OK, unlock succeeded; the only thing left to do is update the stateid. | |
4242 | */ | |
4243 | update_stateid(&stp->st_stateid); | |
4244 | memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
4245 | ||
4246 | out: | |
f2327d9a | 4247 | if (locku->lu_stateowner) { |
1da177e4 | 4248 | nfs4_get_stateowner(locku->lu_stateowner); |
a4f1706a | 4249 | cstate->replay_owner = locku->lu_stateowner; |
f2327d9a | 4250 | } |
1da177e4 LT |
4251 | nfs4_unlock_state(); |
4252 | return status; | |
4253 | ||
4254 | out_nfserr: | |
b8dd7b9a | 4255 | status = nfserrno(err); |
1da177e4 LT |
4256 | goto out; |
4257 | } | |
4258 | ||
4259 | /* | |
4260 | * returns | |
4261 | * 1: locks held by lockowner | |
4262 | * 0: no locks held by lockowner | |
4263 | */ | |
4264 | static int | |
f9d7562f | 4265 | check_for_locks(struct nfs4_file *filp, struct nfs4_stateowner *lowner) |
1da177e4 LT |
4266 | { |
4267 | struct file_lock **flpp; | |
f9d7562f | 4268 | struct inode *inode = filp->fi_inode; |
1da177e4 LT |
4269 | int status = 0; |
4270 | ||
b89f4321 | 4271 | lock_flocks(); |
1da177e4 | 4272 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
796dadfd | 4273 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
4274 | status = 1; |
4275 | goto out; | |
796dadfd | 4276 | } |
1da177e4 LT |
4277 | } |
4278 | out: | |
b89f4321 | 4279 | unlock_flocks(); |
1da177e4 LT |
4280 | return status; |
4281 | } | |
4282 | ||
b37ad28b | 4283 | __be32 |
b591480b BF |
4284 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
4285 | struct nfsd4_compound_state *cstate, | |
4286 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
4287 | { |
4288 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe N |
4289 | struct nfs4_stateowner *sop; |
4290 | struct nfs4_stateid *stp; | |
1da177e4 | 4291 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe N |
4292 | struct list_head matches; |
4293 | int i; | |
b37ad28b | 4294 | __be32 status; |
1da177e4 LT |
4295 | |
4296 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
4297 | clid->cl_boot, clid->cl_id); | |
4298 | ||
4299 | /* XXX check for lease expiration */ | |
4300 | ||
4301 | status = nfserr_stale_clientid; | |
849823c5 | 4302 | if (STALE_CLIENTID(clid)) |
1da177e4 | 4303 | return status; |
1da177e4 LT |
4304 | |
4305 | nfs4_lock_state(); | |
4306 | ||
3e9e3dbe N |
4307 | status = nfserr_locks_held; |
4308 | /* XXX: we're doing a linear search through all the lockowners. | |
4309 | * Yipes! For now we'll just hope clients aren't really using | |
4310 | * release_lockowner much, but eventually we have to fix these | |
4311 | * data structures. */ | |
4312 | INIT_LIST_HEAD(&matches); | |
4313 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
4314 | list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { | |
599e0a22 | 4315 | if (!same_owner_str(sop, owner, clid)) |
3e9e3dbe N |
4316 | continue; |
4317 | list_for_each_entry(stp, &sop->so_stateids, | |
4318 | st_perstateowner) { | |
f9d7562f | 4319 | if (check_for_locks(stp->st_file, sop)) |
3e9e3dbe N |
4320 | goto out; |
4321 | /* Note: so_perclient unused for lockowners, | |
4322 | * so it's OK to fool with here. */ | |
4323 | list_add(&sop->so_perclient, &matches); | |
4324 | } | |
1da177e4 | 4325 | } |
3e9e3dbe N |
4326 | } |
4327 | /* Clients probably won't expect us to return with some (but not all) | |
4328 | * of the lockowner state released; so don't release any until all | |
4329 | * have been checked. */ | |
4330 | status = nfs_ok; | |
0fa822e4 N |
4331 | while (!list_empty(&matches)) { |
4332 | sop = list_entry(matches.next, struct nfs4_stateowner, | |
4333 | so_perclient); | |
4334 | /* unhash_stateowner deletes so_perclient only | |
4335 | * for openowners. */ | |
4336 | list_del(&sop->so_perclient); | |
f044ff83 | 4337 | release_lockowner(sop); |
1da177e4 LT |
4338 | } |
4339 | out: | |
4340 | nfs4_unlock_state(); | |
4341 | return status; | |
4342 | } | |
4343 | ||
4344 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 4345 | alloc_reclaim(void) |
1da177e4 | 4346 | { |
a55370a3 | 4347 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
4348 | } |
4349 | ||
c7b9a459 | 4350 | int |
a1bcecd2 | 4351 | nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) |
c7b9a459 N |
4352 | { |
4353 | unsigned int strhashval = clientstr_hashval(name); | |
4354 | struct nfs4_client *clp; | |
4355 | ||
e203d506 | 4356 | clp = find_confirmed_client_by_str(name, strhashval); |
c7b9a459 N |
4357 | return clp ? 1 : 0; |
4358 | } | |
4359 | ||
1da177e4 LT |
4360 | /* |
4361 | * failure => all reset bets are off, nfserr_no_grace... | |
4362 | */ | |
190e4fbf N |
4363 | int |
4364 | nfs4_client_to_reclaim(const char *name) | |
1da177e4 LT |
4365 | { |
4366 | unsigned int strhashval; | |
4367 | struct nfs4_client_reclaim *crp = NULL; | |
4368 | ||
a55370a3 N |
4369 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
4370 | crp = alloc_reclaim(); | |
1da177e4 LT |
4371 | if (!crp) |
4372 | return 0; | |
a55370a3 | 4373 | strhashval = clientstr_hashval(name); |
1da177e4 LT |
4374 | INIT_LIST_HEAD(&crp->cr_strhash); |
4375 | list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); | |
a55370a3 | 4376 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
1da177e4 LT |
4377 | reclaim_str_hashtbl_size++; |
4378 | return 1; | |
4379 | } | |
4380 | ||
4381 | static void | |
4382 | nfs4_release_reclaim(void) | |
4383 | { | |
4384 | struct nfs4_client_reclaim *crp = NULL; | |
4385 | int i; | |
4386 | ||
1da177e4 LT |
4387 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4388 | while (!list_empty(&reclaim_str_hashtbl[i])) { | |
4389 | crp = list_entry(reclaim_str_hashtbl[i].next, | |
4390 | struct nfs4_client_reclaim, cr_strhash); | |
4391 | list_del(&crp->cr_strhash); | |
1da177e4 LT |
4392 | kfree(crp); |
4393 | reclaim_str_hashtbl_size--; | |
4394 | } | |
4395 | } | |
4396 | BUG_ON(reclaim_str_hashtbl_size); | |
4397 | } | |
4398 | ||
4399 | /* | |
4400 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
fd39ca9a | 4401 | static struct nfs4_client_reclaim * |
1da177e4 LT |
4402 | nfs4_find_reclaim_client(clientid_t *clid) |
4403 | { | |
4404 | unsigned int strhashval; | |
4405 | struct nfs4_client *clp; | |
4406 | struct nfs4_client_reclaim *crp = NULL; | |
4407 | ||
4408 | ||
4409 | /* find clientid in conf_id_hashtbl */ | |
4410 | clp = find_confirmed_client(clid); | |
4411 | if (clp == NULL) | |
4412 | return NULL; | |
4413 | ||
a55370a3 N |
4414 | dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", |
4415 | clp->cl_name.len, clp->cl_name.data, | |
4416 | clp->cl_recdir); | |
1da177e4 LT |
4417 | |
4418 | /* find clp->cl_name in reclaim_str_hashtbl */ | |
a55370a3 | 4419 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 | 4420 | list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { |
a55370a3 | 4421 | if (same_name(crp->cr_recdir, clp->cl_recdir)) { |
1da177e4 LT |
4422 | return crp; |
4423 | } | |
4424 | } | |
4425 | return NULL; | |
4426 | } | |
4427 | ||
4428 | /* | |
4429 | * Called from OPEN. Look for clientid in reclaim list. | |
4430 | */ | |
b37ad28b | 4431 | __be32 |
1da177e4 LT |
4432 | nfs4_check_open_reclaim(clientid_t *clid) |
4433 | { | |
dfc83565 | 4434 | return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; |
1da177e4 LT |
4435 | } |
4436 | ||
ac4d8ff2 | 4437 | /* initialization to perform at module load time: */ |
1da177e4 | 4438 | |
e8ff2a84 | 4439 | int |
ac4d8ff2 | 4440 | nfs4_state_init(void) |
1da177e4 | 4441 | { |
e8ff2a84 | 4442 | int i, status; |
1da177e4 | 4443 | |
e8ff2a84 BF |
4444 | status = nfsd4_init_slabs(); |
4445 | if (status) | |
4446 | return status; | |
1da177e4 LT |
4447 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4448 | INIT_LIST_HEAD(&conf_id_hashtbl[i]); | |
4449 | INIT_LIST_HEAD(&conf_str_hashtbl[i]); | |
4450 | INIT_LIST_HEAD(&unconf_str_hashtbl[i]); | |
4451 | INIT_LIST_HEAD(&unconf_id_hashtbl[i]); | |
02cb2858 | 4452 | INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); |
1da177e4 | 4453 | } |
5282fd72 ME |
4454 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
4455 | INIT_LIST_HEAD(&sessionid_hashtbl[i]); | |
1da177e4 LT |
4456 | for (i = 0; i < FILE_HASH_SIZE; i++) { |
4457 | INIT_LIST_HEAD(&file_hashtbl[i]); | |
4458 | } | |
506f275f BF |
4459 | for (i = 0; i < OPEN_OWNER_HASH_SIZE; i++) { |
4460 | INIT_LIST_HEAD(&open_ownerstr_hashtbl[i]); | |
4461 | INIT_LIST_HEAD(&open_ownerid_hashtbl[i]); | |
1da177e4 | 4462 | } |
b79abadd | 4463 | for (i = 0; i < STATEID_HASH_SIZE; i++) |
1da177e4 | 4464 | INIT_LIST_HEAD(&stateid_hashtbl[i]); |
1da177e4 LT |
4465 | for (i = 0; i < LOCK_HASH_SIZE; i++) { |
4466 | INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); | |
4467 | INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); | |
4468 | } | |
1da177e4 | 4469 | memset(&onestateid, ~0, sizeof(stateid_t)); |
1da177e4 LT |
4470 | INIT_LIST_HEAD(&close_lru); |
4471 | INIT_LIST_HEAD(&client_lru); | |
4472 | INIT_LIST_HEAD(&del_recall_lru); | |
ac4d8ff2 | 4473 | reclaim_str_hashtbl_size = 0; |
e8ff2a84 | 4474 | return 0; |
ac4d8ff2 N |
4475 | } |
4476 | ||
190e4fbf N |
4477 | static void |
4478 | nfsd4_load_reboot_recovery_data(void) | |
4479 | { | |
4480 | int status; | |
4481 | ||
0964a3d3 | 4482 | nfs4_lock_state(); |
48483bf2 | 4483 | nfsd4_init_recdir(); |
190e4fbf | 4484 | status = nfsd4_recdir_load(); |
0964a3d3 | 4485 | nfs4_unlock_state(); |
190e4fbf N |
4486 | if (status) |
4487 | printk("NFSD: Failure reading reboot recovery data\n"); | |
4488 | } | |
4489 | ||
c2f1a551 MS |
4490 | /* |
4491 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
4492 | * client may quite reasonably hang on to a delegation as long as it has | |
4493 | * the inode cached. This becomes an obvious problem the first time a | |
4494 | * client's inode cache approaches the size of the server's total memory. | |
4495 | * | |
4496 | * For now we avoid this problem by imposing a hard limit on the number | |
4497 | * of delegations, which varies according to the server's memory size. | |
4498 | */ | |
4499 | static void | |
4500 | set_max_delegations(void) | |
4501 | { | |
4502 | /* | |
4503 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
4504 | * estimates suggest that in the worst case (where every delegation | |
4505 | * is for a different inode), a delegation could take about 1.5K, | |
4506 | * giving a worst case usage of about 6% of memory. | |
4507 | */ | |
4508 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
4509 | } | |
4510 | ||
ac4d8ff2 N |
4511 | /* initialization to perform when the nfsd service is started: */ |
4512 | ||
29ab23cc | 4513 | static int |
ac4d8ff2 N |
4514 | __nfs4_state_start(void) |
4515 | { | |
b5a1a81e BF |
4516 | int ret; |
4517 | ||
1da177e4 | 4518 | boot_time = get_seconds(); |
af558e33 | 4519 | locks_start_grace(&nfsd4_manager); |
9a8db97e | 4520 | printk(KERN_INFO "NFSD: starting %ld-second grace period\n", |
e46b498c | 4521 | nfsd4_grace); |
b5a1a81e BF |
4522 | ret = set_callback_cred(); |
4523 | if (ret) | |
4524 | return -ENOMEM; | |
58da282b | 4525 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
29ab23cc BF |
4526 | if (laundry_wq == NULL) |
4527 | return -ENOMEM; | |
b5a1a81e BF |
4528 | ret = nfsd4_create_callback_queue(); |
4529 | if (ret) | |
4530 | goto out_free_laundry; | |
e46b498c | 4531 | queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); |
c2f1a551 | 4532 | set_max_delegations(); |
b5a1a81e BF |
4533 | return 0; |
4534 | out_free_laundry: | |
4535 | destroy_workqueue(laundry_wq); | |
4536 | return ret; | |
1da177e4 LT |
4537 | } |
4538 | ||
29ab23cc | 4539 | int |
76a3550e | 4540 | nfs4_state_start(void) |
1da177e4 | 4541 | { |
190e4fbf | 4542 | nfsd4_load_reboot_recovery_data(); |
4ad9a344 | 4543 | return __nfs4_state_start(); |
1da177e4 LT |
4544 | } |
4545 | ||
1da177e4 LT |
4546 | static void |
4547 | __nfs4_state_shutdown(void) | |
4548 | { | |
4549 | int i; | |
4550 | struct nfs4_client *clp = NULL; | |
4551 | struct nfs4_delegation *dp = NULL; | |
1da177e4 LT |
4552 | struct list_head *pos, *next, reaplist; |
4553 | ||
1da177e4 LT |
4554 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4555 | while (!list_empty(&conf_id_hashtbl[i])) { | |
4556 | clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
4557 | expire_client(clp); | |
4558 | } | |
4559 | while (!list_empty(&unconf_str_hashtbl[i])) { | |
4560 | clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); | |
4561 | expire_client(clp); | |
4562 | } | |
4563 | } | |
4564 | INIT_LIST_HEAD(&reaplist); | |
4565 | spin_lock(&recall_lock); | |
4566 | list_for_each_safe(pos, next, &del_recall_lru) { | |
4567 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4568 | list_move(&dp->dl_recall_lru, &reaplist); | |
4569 | } | |
4570 | spin_unlock(&recall_lock); | |
4571 | list_for_each_safe(pos, next, &reaplist) { | |
4572 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4573 | list_del_init(&dp->dl_recall_lru); | |
4574 | unhash_delegation(dp); | |
4575 | } | |
4576 | ||
190e4fbf | 4577 | nfsd4_shutdown_recdir(); |
1da177e4 LT |
4578 | } |
4579 | ||
4580 | void | |
4581 | nfs4_state_shutdown(void) | |
4582 | { | |
afe2c511 | 4583 | cancel_delayed_work_sync(&laundromat_work); |
5e8d5c29 | 4584 | destroy_workqueue(laundry_wq); |
2c5e7615 | 4585 | locks_end_grace(&nfsd4_manager); |
1da177e4 LT |
4586 | nfs4_lock_state(); |
4587 | nfs4_release_reclaim(); | |
4588 | __nfs4_state_shutdown(); | |
1da177e4 | 4589 | nfs4_unlock_state(); |
c3935e30 | 4590 | nfsd4_destroy_callback_queue(); |
1da177e4 | 4591 | } |