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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 */ |
e1ca12df | 63 | static struct nfs4_delegation * search_for_delegation(stateid_t *stid); |
1da177e4 | 64 | static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid); |
fe0750e5 | 65 | static int check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner); |
1da177e4 | 66 | |
8b671b80 BF |
67 | /* Locking: */ |
68 | ||
69 | /* Currently used for almost all code touching nfsv4 state: */ | |
353ab6e9 | 70 | static DEFINE_MUTEX(client_mutex); |
1da177e4 | 71 | |
8b671b80 BF |
72 | /* |
73 | * Currently used for the del_recall_lru and file hash table. In an | |
74 | * effort to decrease the scope of the client_mutex, this spinlock may | |
75 | * eventually cover more: | |
76 | */ | |
77 | static DEFINE_SPINLOCK(recall_lock); | |
78 | ||
fe0750e5 BF |
79 | static struct kmem_cache *openowner_slab = NULL; |
80 | static struct kmem_cache *lockowner_slab = NULL; | |
e18b890b CL |
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 | |
dcef0413 | 162 | /* hash table for (open)nfs4_ol_stateid */ |
ef0f3390 N |
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 | ||
36d44c60 BF |
221 | static inline void hash_stid(struct nfs4_stid *stid) |
222 | { | |
223 | stateid_t *s = &stid->sc_stateid; | |
224 | unsigned int hashval; | |
225 | ||
226 | hashval = stateid_hashval(s->si_stateownerid, s->si_fileid); | |
227 | list_add(&stid->sc_hash, &stateid_hashtbl[hashval]); | |
228 | } | |
229 | ||
1da177e4 | 230 | static struct nfs4_delegation * |
dcef0413 | 231 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_ol_stateid *stp, struct svc_fh *current_fh, u32 type) |
1da177e4 LT |
232 | { |
233 | struct nfs4_delegation *dp; | |
234 | struct nfs4_file *fp = stp->st_file; | |
1da177e4 LT |
235 | |
236 | dprintk("NFSD alloc_init_deleg\n"); | |
c3e48080 BF |
237 | /* |
238 | * Major work on the lease subsystem (for example, to support | |
239 | * calbacks on stat) will be required before we can support | |
240 | * write delegations properly. | |
241 | */ | |
242 | if (type != NFS4_OPEN_DELEGATE_READ) | |
243 | return NULL; | |
47f9940c MS |
244 | if (fp->fi_had_conflict) |
245 | return NULL; | |
c2f1a551 | 246 | if (num_delegations > max_delegations) |
ef0f3390 | 247 | return NULL; |
5b2d21c1 N |
248 | dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); |
249 | if (dp == NULL) | |
1da177e4 | 250 | return dp; |
ef0f3390 | 251 | num_delegations++; |
ea1da636 N |
252 | INIT_LIST_HEAD(&dp->dl_perfile); |
253 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 LT |
254 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
255 | dp->dl_client = clp; | |
13cd2184 | 256 | get_nfs4_file(fp); |
1da177e4 | 257 | dp->dl_file = fp; |
1da177e4 | 258 | dp->dl_type = type; |
d5477a8d BF |
259 | dp->dl_stid.sc_stateid.si_boot = boot_time; |
260 | dp->dl_stid.sc_stateid.si_stateownerid = current_delegid++; | |
261 | dp->dl_stid.sc_stateid.si_fileid = 0; | |
262 | dp->dl_stid.sc_stateid.si_generation = 1; | |
6c02eaa1 | 263 | fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); |
1da177e4 LT |
264 | dp->dl_time = 0; |
265 | atomic_set(&dp->dl_count, 1); | |
b5a1a81e | 266 | INIT_WORK(&dp->dl_recall.cb_work, nfsd4_do_callback_rpc); |
1da177e4 LT |
267 | return dp; |
268 | } | |
269 | ||
270 | void | |
271 | nfs4_put_delegation(struct nfs4_delegation *dp) | |
272 | { | |
273 | if (atomic_dec_and_test(&dp->dl_count)) { | |
274 | dprintk("NFSD: freeing dp %p\n",dp); | |
13cd2184 | 275 | put_nfs4_file(dp->dl_file); |
5b2d21c1 | 276 | kmem_cache_free(deleg_slab, dp); |
ef0f3390 | 277 | num_delegations--; |
1da177e4 LT |
278 | } |
279 | } | |
280 | ||
acfdf5c3 | 281 | static void nfs4_put_deleg_lease(struct nfs4_file *fp) |
1da177e4 | 282 | { |
acfdf5c3 BF |
283 | if (atomic_dec_and_test(&fp->fi_delegees)) { |
284 | vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); | |
285 | fp->fi_lease = NULL; | |
4ee63624 | 286 | fput(fp->fi_deleg_file); |
acfdf5c3 BF |
287 | fp->fi_deleg_file = NULL; |
288 | } | |
1da177e4 LT |
289 | } |
290 | ||
291 | /* Called under the state lock. */ | |
292 | static void | |
293 | unhash_delegation(struct nfs4_delegation *dp) | |
294 | { | |
ea1da636 | 295 | list_del_init(&dp->dl_perclnt); |
1da177e4 | 296 | spin_lock(&recall_lock); |
5d926e8c | 297 | list_del_init(&dp->dl_perfile); |
1da177e4 LT |
298 | list_del_init(&dp->dl_recall_lru); |
299 | spin_unlock(&recall_lock); | |
acfdf5c3 | 300 | nfs4_put_deleg_lease(dp->dl_file); |
1da177e4 LT |
301 | nfs4_put_delegation(dp); |
302 | } | |
303 | ||
304 | /* | |
305 | * SETCLIENTID state | |
306 | */ | |
307 | ||
36acb66b | 308 | /* client_lock protects the client lru list and session hash table */ |
9089f1b4 BH |
309 | static DEFINE_SPINLOCK(client_lock); |
310 | ||
1da177e4 LT |
311 | /* Hash tables for nfs4_clientid state */ |
312 | #define CLIENT_HASH_BITS 4 | |
313 | #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) | |
314 | #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) | |
315 | ||
ddc04c41 BF |
316 | static unsigned int clientid_hashval(u32 id) |
317 | { | |
318 | return id & CLIENT_HASH_MASK; | |
319 | } | |
320 | ||
321 | static unsigned int clientstr_hashval(const char *name) | |
322 | { | |
323 | return opaque_hashval(name, 8) & CLIENT_HASH_MASK; | |
324 | } | |
325 | ||
1da177e4 LT |
326 | /* |
327 | * reclaim_str_hashtbl[] holds known client info from previous reset/reboot | |
328 | * used in reboot/reset lease grace period processing | |
329 | * | |
330 | * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed | |
331 | * setclientid_confirmed info. | |
332 | * | |
333 | * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed | |
334 | * setclientid info. | |
335 | * | |
336 | * client_lru holds client queue ordered by nfs4_client.cl_time | |
337 | * for lease renewal. | |
338 | * | |
339 | * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time | |
340 | * for last close replay. | |
341 | */ | |
342 | static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; | |
343 | static int reclaim_str_hashtbl_size = 0; | |
344 | static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; | |
345 | static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; | |
346 | static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; | |
347 | static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; | |
348 | static struct list_head client_lru; | |
349 | static struct list_head close_lru; | |
350 | ||
f9d7562f BF |
351 | /* |
352 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
353 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
354 | * only what share bits are currently in force, but also what | |
355 | * combinations of share bits previous opens have used. This allows us | |
356 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
357 | * return an error if the client attempt to downgrade to a combination | |
358 | * of share bits not explicable by closing some of its previous opens. | |
359 | * | |
360 | * XXX: This enforcement is actually incomplete, since we don't keep | |
361 | * track of access/deny bit combinations; so, e.g., we allow: | |
362 | * | |
363 | * OPEN allow read, deny write | |
364 | * OPEN allow both, deny none | |
365 | * DOWNGRADE allow read, deny none | |
366 | * | |
367 | * which we should reject. | |
368 | */ | |
369 | static void | |
370 | set_access(unsigned int *access, unsigned long bmap) { | |
371 | int i; | |
372 | ||
373 | *access = 0; | |
374 | for (i = 1; i < 4; i++) { | |
375 | if (test_bit(i, &bmap)) | |
376 | *access |= i; | |
377 | } | |
378 | } | |
379 | ||
380 | static void | |
381 | set_deny(unsigned int *deny, unsigned long bmap) { | |
382 | int i; | |
383 | ||
384 | *deny = 0; | |
385 | for (i = 0; i < 4; i++) { | |
386 | if (test_bit(i, &bmap)) | |
387 | *deny |= i ; | |
388 | } | |
389 | } | |
390 | ||
391 | static int | |
dcef0413 | 392 | test_share(struct nfs4_ol_stateid *stp, struct nfsd4_open *open) { |
f9d7562f BF |
393 | unsigned int access, deny; |
394 | ||
395 | set_access(&access, stp->st_access_bmap); | |
396 | set_deny(&deny, stp->st_deny_bmap); | |
397 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) | |
398 | return 0; | |
399 | return 1; | |
400 | } | |
401 | ||
402 | static int nfs4_access_to_omode(u32 access) | |
403 | { | |
8f34a430 | 404 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
405 | case NFS4_SHARE_ACCESS_READ: |
406 | return O_RDONLY; | |
407 | case NFS4_SHARE_ACCESS_WRITE: | |
408 | return O_WRONLY; | |
409 | case NFS4_SHARE_ACCESS_BOTH: | |
410 | return O_RDWR; | |
411 | } | |
412 | BUG(); | |
413 | } | |
414 | ||
dcef0413 | 415 | static void unhash_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 416 | { |
dcef0413 | 417 | list_del(&stp->st_stid.sc_hash); |
529d7b2a BF |
418 | list_del(&stp->st_perfile); |
419 | list_del(&stp->st_perstateowner); | |
420 | } | |
421 | ||
dcef0413 | 422 | static void close_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 423 | { |
499f3edc | 424 | int i; |
0997b173 | 425 | |
23fcf2ec | 426 | if (stp->st_access_bmap) { |
499f3edc BF |
427 | for (i = 1; i < 4; i++) { |
428 | if (test_bit(i, &stp->st_access_bmap)) | |
429 | nfs4_file_put_access(stp->st_file, | |
430 | nfs4_access_to_omode(i)); | |
4665e2ba | 431 | __clear_bit(i, &stp->st_access_bmap); |
499f3edc | 432 | } |
23fcf2ec | 433 | } |
a96e5b90 | 434 | put_nfs4_file(stp->st_file); |
4665e2ba BF |
435 | stp->st_file = NULL; |
436 | } | |
437 | ||
dcef0413 | 438 | static void free_generic_stateid(struct nfs4_ol_stateid *stp) |
4665e2ba BF |
439 | { |
440 | close_generic_stateid(stp); | |
529d7b2a BF |
441 | kmem_cache_free(stateid_slab, stp); |
442 | } | |
443 | ||
dcef0413 | 444 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a BF |
445 | { |
446 | struct file *file; | |
447 | ||
448 | unhash_generic_stateid(stp); | |
449 | file = find_any_file(stp->st_file); | |
450 | if (file) | |
fe0750e5 | 451 | locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner)); |
529d7b2a BF |
452 | free_generic_stateid(stp); |
453 | } | |
454 | ||
fe0750e5 | 455 | static void unhash_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 456 | { |
dcef0413 | 457 | struct nfs4_ol_stateid *stp; |
529d7b2a | 458 | |
fe0750e5 BF |
459 | list_del(&lo->lo_owner.so_idhash); |
460 | list_del(&lo->lo_owner.so_strhash); | |
461 | list_del(&lo->lo_perstateid); | |
462 | while (!list_empty(&lo->lo_owner.so_stateids)) { | |
463 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
dcef0413 | 464 | struct nfs4_ol_stateid, st_perstateowner); |
529d7b2a BF |
465 | release_lock_stateid(stp); |
466 | } | |
467 | } | |
468 | ||
fe0750e5 | 469 | static void release_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 470 | { |
fe0750e5 BF |
471 | unhash_lockowner(lo); |
472 | nfs4_free_lockowner(lo); | |
529d7b2a BF |
473 | } |
474 | ||
475 | static void | |
dcef0413 | 476 | release_stateid_lockowners(struct nfs4_ol_stateid *open_stp) |
529d7b2a | 477 | { |
fe0750e5 | 478 | struct nfs4_lockowner *lo; |
529d7b2a BF |
479 | |
480 | while (!list_empty(&open_stp->st_lockowners)) { | |
fe0750e5 BF |
481 | lo = list_entry(open_stp->st_lockowners.next, |
482 | struct nfs4_lockowner, lo_perstateid); | |
483 | release_lockowner(lo); | |
529d7b2a BF |
484 | } |
485 | } | |
486 | ||
dcef0413 | 487 | static void release_open_stateid(struct nfs4_ol_stateid *stp) |
2283963f BF |
488 | { |
489 | unhash_generic_stateid(stp); | |
490 | release_stateid_lockowners(stp); | |
2283963f BF |
491 | free_generic_stateid(stp); |
492 | } | |
493 | ||
fe0750e5 | 494 | static void unhash_openowner(struct nfs4_openowner *oo) |
f1d110ca | 495 | { |
dcef0413 | 496 | struct nfs4_ol_stateid *stp; |
f1d110ca | 497 | |
fe0750e5 BF |
498 | list_del(&oo->oo_owner.so_idhash); |
499 | list_del(&oo->oo_owner.so_strhash); | |
500 | list_del(&oo->oo_perclient); | |
501 | while (!list_empty(&oo->oo_owner.so_stateids)) { | |
502 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
dcef0413 | 503 | struct nfs4_ol_stateid, st_perstateowner); |
f044ff83 | 504 | release_open_stateid(stp); |
f1d110ca BF |
505 | } |
506 | } | |
507 | ||
fe0750e5 | 508 | static void release_openowner(struct nfs4_openowner *oo) |
f1d110ca | 509 | { |
fe0750e5 BF |
510 | unhash_openowner(oo); |
511 | list_del(&oo->oo_close_lru); | |
512 | nfs4_free_openowner(oo); | |
f1d110ca BF |
513 | } |
514 | ||
5282fd72 ME |
515 | #define SESSION_HASH_SIZE 512 |
516 | static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; | |
517 | ||
518 | static inline int | |
519 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
520 | { | |
521 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
522 | ||
523 | return sid->sequence % SESSION_HASH_SIZE; | |
524 | } | |
525 | ||
526 | static inline void | |
527 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
528 | { | |
529 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
530 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
531 | } | |
532 | ||
ec6b5d7b AA |
533 | static void |
534 | gen_sessionid(struct nfsd4_session *ses) | |
535 | { | |
536 | struct nfs4_client *clp = ses->se_client; | |
537 | struct nfsd4_sessionid *sid; | |
538 | ||
539 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
540 | sid->clientid = clp->cl_clientid; | |
541 | sid->sequence = current_sessionid++; | |
542 | sid->reserved = 0; | |
543 | } | |
544 | ||
545 | /* | |
a649637c AA |
546 | * The protocol defines ca_maxresponssize_cached to include the size of |
547 | * the rpc header, but all we need to cache is the data starting after | |
548 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
549 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
550 | * value that is the number of bytes in our cache plus a few additional | |
551 | * bytes. In order to stay on the safe side, and not promise more than | |
552 | * we can cache, those additional bytes must be the minimum possible: 24 | |
553 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
554 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
555 | * for the SEQUENCE op response: | |
556 | */ | |
557 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
558 | ||
557ce264 AA |
559 | static void |
560 | free_session_slots(struct nfsd4_session *ses) | |
561 | { | |
562 | int i; | |
563 | ||
564 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
565 | kfree(ses->se_slots[i]); | |
566 | } | |
567 | ||
a649637c | 568 | /* |
efe0cb6d BF |
569 | * We don't actually need to cache the rpc and session headers, so we |
570 | * can allocate a little less for each slot: | |
571 | */ | |
572 | static inline int slot_bytes(struct nfsd4_channel_attrs *ca) | |
573 | { | |
574 | return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
575 | } | |
576 | ||
5b6feee9 | 577 | static int nfsd4_sanitize_slot_size(u32 size) |
ec6b5d7b | 578 | { |
5b6feee9 BF |
579 | size -= NFSD_MIN_HDR_SEQ_SZ; /* We don't cache the rpc header */ |
580 | size = min_t(u32, size, NFSD_SLOT_CACHE_SIZE); | |
ec6b5d7b | 581 | |
5b6feee9 BF |
582 | return size; |
583 | } | |
ec6b5d7b | 584 | |
5b6feee9 BF |
585 | /* |
586 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c AA |
587 | * re-negotiate active sessions and reduce their slot usage to make |
588 | * rooom for new connections. For now we just fail the create session. | |
ec6b5d7b | 589 | */ |
5b6feee9 | 590 | static int nfsd4_get_drc_mem(int slotsize, u32 num) |
ec6b5d7b | 591 | { |
5b6feee9 | 592 | int avail; |
ec6b5d7b | 593 | |
5b6feee9 | 594 | num = min_t(u32, num, NFSD_MAX_SLOTS_PER_SESSION); |
5d77ddfb | 595 | |
5b6feee9 BF |
596 | spin_lock(&nfsd_drc_lock); |
597 | avail = min_t(int, NFSD_MAX_MEM_PER_SESSION, | |
598 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
599 | num = min_t(int, num, avail / slotsize); | |
600 | nfsd_drc_mem_used += num * slotsize; | |
601 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 602 | |
5b6feee9 BF |
603 | return num; |
604 | } | |
ec6b5d7b | 605 | |
5b6feee9 BF |
606 | static void nfsd4_put_drc_mem(int slotsize, int num) |
607 | { | |
4bd9b0f4 | 608 | spin_lock(&nfsd_drc_lock); |
5b6feee9 | 609 | nfsd_drc_mem_used -= slotsize * num; |
4bd9b0f4 | 610 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 611 | } |
ec6b5d7b | 612 | |
5b6feee9 BF |
613 | static struct nfsd4_session *alloc_session(int slotsize, int numslots) |
614 | { | |
615 | struct nfsd4_session *new; | |
616 | int mem, i; | |
a649637c | 617 | |
5b6feee9 BF |
618 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
619 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
620 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 621 | |
5b6feee9 BF |
622 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
623 | if (!new) | |
624 | return NULL; | |
557ce264 | 625 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 BF |
626 | for (i = 0; i < numslots; i++) { |
627 | mem = sizeof(struct nfsd4_slot) + slotsize; | |
628 | new->se_slots[i] = kzalloc(mem, GFP_KERNEL); | |
629 | if (!new->se_slots[i]) | |
557ce264 | 630 | goto out_free; |
557ce264 | 631 | } |
5b6feee9 BF |
632 | return new; |
633 | out_free: | |
634 | while (i--) | |
635 | kfree(new->se_slots[i]); | |
636 | kfree(new); | |
637 | return NULL; | |
ec6b5d7b AA |
638 | } |
639 | ||
5b6feee9 | 640 | static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, struct nfsd4_channel_attrs *req, int numslots, int slotsize) |
ec6b5d7b | 641 | { |
5b6feee9 | 642 | u32 maxrpc = nfsd_serv->sv_max_mesg; |
ec6b5d7b | 643 | |
5b6feee9 | 644 | new->maxreqs = numslots; |
d2b21743 MJ |
645 | new->maxresp_cached = min_t(u32, req->maxresp_cached, |
646 | slotsize + NFSD_MIN_HDR_SEQ_SZ); | |
5b6feee9 BF |
647 | new->maxreq_sz = min_t(u32, req->maxreq_sz, maxrpc); |
648 | new->maxresp_sz = min_t(u32, req->maxresp_sz, maxrpc); | |
649 | new->maxops = min_t(u32, req->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
650 | } | |
ec6b5d7b | 651 | |
19cf5c02 BF |
652 | static void free_conn(struct nfsd4_conn *c) |
653 | { | |
654 | svc_xprt_put(c->cn_xprt); | |
655 | kfree(c); | |
656 | } | |
ec6b5d7b | 657 | |
19cf5c02 BF |
658 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
659 | { | |
660 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
661 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 662 | |
19cf5c02 BF |
663 | spin_lock(&clp->cl_lock); |
664 | if (!list_empty(&c->cn_persession)) { | |
665 | list_del(&c->cn_persession); | |
666 | free_conn(c); | |
667 | } | |
668 | spin_unlock(&clp->cl_lock); | |
eea49806 | 669 | nfsd4_probe_callback(clp); |
19cf5c02 | 670 | } |
ec6b5d7b | 671 | |
d29c374c | 672 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 673 | { |
c7662518 | 674 | struct nfsd4_conn *conn; |
ec6b5d7b | 675 | |
c7662518 BF |
676 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
677 | if (!conn) | |
db90681d | 678 | return NULL; |
c7662518 BF |
679 | svc_xprt_get(rqstp->rq_xprt); |
680 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 681 | conn->cn_flags = flags; |
db90681d BF |
682 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
683 | return conn; | |
684 | } | |
a649637c | 685 | |
328ead28 BF |
686 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
687 | { | |
688 | conn->cn_session = ses; | |
689 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
690 | } |
691 | ||
db90681d | 692 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 693 | { |
db90681d | 694 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 695 | |
c7662518 | 696 | spin_lock(&clp->cl_lock); |
328ead28 | 697 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 698 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
699 | } |
700 | ||
21b75b01 | 701 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 702 | { |
19cf5c02 | 703 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 704 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
705 | } |
706 | ||
1d1bc8f2 | 707 | static __be32 nfsd4_new_conn(struct svc_rqst *rqstp, struct nfsd4_session *ses, u32 dir) |
ec6b5d7b | 708 | { |
db90681d | 709 | struct nfsd4_conn *conn; |
21b75b01 | 710 | int ret; |
ec6b5d7b | 711 | |
1d1bc8f2 | 712 | conn = alloc_conn(rqstp, dir); |
db90681d BF |
713 | if (!conn) |
714 | return nfserr_jukebox; | |
715 | nfsd4_hash_conn(conn, ses); | |
21b75b01 BF |
716 | ret = nfsd4_register_conn(conn); |
717 | if (ret) | |
718 | /* oops; xprt is already down: */ | |
719 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
c7662518 BF |
720 | return nfs_ok; |
721 | } | |
ec6b5d7b | 722 | |
1d1bc8f2 BF |
723 | static __be32 nfsd4_new_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_session *ses) |
724 | { | |
725 | u32 dir = NFS4_CDFC4_FORE; | |
726 | ||
727 | if (ses->se_flags & SESSION4_BACK_CHAN) | |
728 | dir |= NFS4_CDFC4_BACK; | |
729 | ||
730 | return nfsd4_new_conn(rqstp, ses, dir); | |
731 | } | |
732 | ||
733 | /* must be called under client_lock */ | |
19cf5c02 | 734 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 735 | { |
19cf5c02 BF |
736 | struct nfs4_client *clp = s->se_client; |
737 | struct nfsd4_conn *c; | |
ec6b5d7b | 738 | |
19cf5c02 BF |
739 | spin_lock(&clp->cl_lock); |
740 | while (!list_empty(&s->se_conns)) { | |
741 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
742 | list_del_init(&c->cn_persession); | |
743 | spin_unlock(&clp->cl_lock); | |
557ce264 | 744 | |
19cf5c02 BF |
745 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
746 | free_conn(c); | |
ec6b5d7b | 747 | |
19cf5c02 BF |
748 | spin_lock(&clp->cl_lock); |
749 | } | |
750 | spin_unlock(&clp->cl_lock); | |
c7662518 | 751 | } |
ec6b5d7b | 752 | |
c7662518 BF |
753 | void free_session(struct kref *kref) |
754 | { | |
755 | struct nfsd4_session *ses; | |
756 | int mem; | |
757 | ||
758 | ses = container_of(kref, struct nfsd4_session, se_ref); | |
19cf5c02 | 759 | nfsd4_del_conns(ses); |
c7662518 BF |
760 | spin_lock(&nfsd_drc_lock); |
761 | mem = ses->se_fchannel.maxreqs * slot_bytes(&ses->se_fchannel); | |
762 | nfsd_drc_mem_used -= mem; | |
763 | spin_unlock(&nfsd_drc_lock); | |
764 | free_session_slots(ses); | |
765 | kfree(ses); | |
766 | } | |
767 | ||
ac7c46f2 | 768 | static struct nfsd4_session *alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
5b6feee9 BF |
769 | { |
770 | struct nfsd4_session *new; | |
771 | struct nfsd4_channel_attrs *fchan = &cses->fore_channel; | |
772 | int numslots, slotsize; | |
c7662518 | 773 | int status; |
5b6feee9 BF |
774 | int idx; |
775 | ||
776 | /* | |
777 | * Note decreasing slot size below client's request may | |
778 | * make it difficult for client to function correctly, whereas | |
779 | * decreasing the number of slots will (just?) affect | |
780 | * performance. When short on memory we therefore prefer to | |
781 | * decrease number of slots instead of their size. | |
782 | */ | |
783 | slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached); | |
784 | numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs); | |
ced6dfe9 MJ |
785 | if (numslots < 1) |
786 | return NULL; | |
5b6feee9 BF |
787 | |
788 | new = alloc_session(slotsize, numslots); | |
789 | if (!new) { | |
790 | nfsd4_put_drc_mem(slotsize, fchan->maxreqs); | |
ac7c46f2 | 791 | return NULL; |
557ce264 | 792 | } |
5b6feee9 | 793 | init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize); |
557ce264 | 794 | |
ec6b5d7b AA |
795 | new->se_client = clp; |
796 | gen_sessionid(new); | |
ec6b5d7b | 797 | |
c7662518 BF |
798 | INIT_LIST_HEAD(&new->se_conns); |
799 | ||
ac7c46f2 | 800 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 801 | new->se_flags = cses->flags; |
8b5ce5cd | 802 | new->se_cb_prog = cses->callback_prog; |
ec6b5d7b | 803 | kref_init(&new->se_ref); |
5b6feee9 | 804 | idx = hash_sessionid(&new->se_sessionid); |
9089f1b4 | 805 | spin_lock(&client_lock); |
ec6b5d7b | 806 | list_add(&new->se_hash, &sessionid_hashtbl[idx]); |
4c649378 | 807 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 808 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 809 | spin_unlock(&clp->cl_lock); |
9089f1b4 | 810 | spin_unlock(&client_lock); |
ec6b5d7b | 811 | |
1d1bc8f2 | 812 | status = nfsd4_new_conn_from_crses(rqstp, new); |
ac7c46f2 | 813 | /* whoops: benny points out, status is ignored! (err, or bogus) */ |
c7662518 BF |
814 | if (status) { |
815 | free_session(&new->se_ref); | |
ac7c46f2 | 816 | return NULL; |
c7662518 | 817 | } |
dcbeaa68 | 818 | if (cses->flags & SESSION4_BACK_CHAN) { |
edd76786 | 819 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
820 | /* |
821 | * This is a little silly; with sessions there's no real | |
822 | * use for the callback address. Use the peer address | |
823 | * as a reasonable default for now, but consider fixing | |
824 | * the rpc client not to require an address in the | |
825 | * future: | |
826 | */ | |
edd76786 BF |
827 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
828 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 829 | } |
dcbeaa68 | 830 | nfsd4_probe_callback(clp); |
ac7c46f2 | 831 | return new; |
ec6b5d7b AA |
832 | } |
833 | ||
9089f1b4 | 834 | /* caller must hold client_lock */ |
5282fd72 ME |
835 | static struct nfsd4_session * |
836 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) | |
837 | { | |
838 | struct nfsd4_session *elem; | |
839 | int idx; | |
840 | ||
841 | dump_sessionid(__func__, sessionid); | |
842 | idx = hash_sessionid(sessionid); | |
5282fd72 ME |
843 | /* Search in the appropriate list */ |
844 | list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { | |
5282fd72 ME |
845 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
846 | NFS4_MAX_SESSIONID_LEN)) { | |
847 | return elem; | |
848 | } | |
849 | } | |
850 | ||
851 | dprintk("%s: session not found\n", __func__); | |
852 | return NULL; | |
853 | } | |
854 | ||
9089f1b4 | 855 | /* caller must hold client_lock */ |
7116ed6b | 856 | static void |
5282fd72 | 857 | unhash_session(struct nfsd4_session *ses) |
7116ed6b AA |
858 | { |
859 | list_del(&ses->se_hash); | |
4c649378 | 860 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 861 | list_del(&ses->se_perclnt); |
4c649378 | 862 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
863 | } |
864 | ||
36acb66b | 865 | /* must be called under the client_lock */ |
1da177e4 | 866 | static inline void |
36acb66b | 867 | renew_client_locked(struct nfs4_client *clp) |
1da177e4 | 868 | { |
07cd4909 BH |
869 | if (is_client_expired(clp)) { |
870 | dprintk("%s: client (clientid %08x/%08x) already expired\n", | |
871 | __func__, | |
872 | clp->cl_clientid.cl_boot, | |
873 | clp->cl_clientid.cl_id); | |
874 | return; | |
875 | } | |
876 | ||
1da177e4 LT |
877 | /* |
878 | * Move client to the end to the LRU list. | |
879 | */ | |
880 | dprintk("renewing client (clientid %08x/%08x)\n", | |
881 | clp->cl_clientid.cl_boot, | |
882 | clp->cl_clientid.cl_id); | |
883 | list_move_tail(&clp->cl_lru, &client_lru); | |
884 | clp->cl_time = get_seconds(); | |
885 | } | |
886 | ||
36acb66b BH |
887 | static inline void |
888 | renew_client(struct nfs4_client *clp) | |
889 | { | |
890 | spin_lock(&client_lock); | |
891 | renew_client_locked(clp); | |
892 | spin_unlock(&client_lock); | |
893 | } | |
894 | ||
1da177e4 LT |
895 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
896 | static int | |
897 | STALE_CLIENTID(clientid_t *clid) | |
898 | { | |
899 | if (clid->cl_boot == boot_time) | |
900 | return 0; | |
60adfc50 AA |
901 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
902 | clid->cl_boot, clid->cl_id, boot_time); | |
1da177e4 LT |
903 | return 1; |
904 | } | |
905 | ||
906 | /* | |
907 | * XXX Should we use a slab cache ? | |
908 | * This type of memory management is somewhat inefficient, but we use it | |
909 | * anyway since SETCLIENTID is not a common operation. | |
910 | */ | |
35bba9a3 | 911 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
912 | { |
913 | struct nfs4_client *clp; | |
914 | ||
35bba9a3 BF |
915 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
916 | if (clp == NULL) | |
917 | return NULL; | |
918 | clp->cl_name.data = kmalloc(name.len, GFP_KERNEL); | |
919 | if (clp->cl_name.data == NULL) { | |
920 | kfree(clp); | |
921 | return NULL; | |
1da177e4 | 922 | } |
35bba9a3 BF |
923 | memcpy(clp->cl_name.data, name.data, name.len); |
924 | clp->cl_name.len = name.len; | |
1da177e4 LT |
925 | return clp; |
926 | } | |
927 | ||
928 | static inline void | |
929 | free_client(struct nfs4_client *clp) | |
930 | { | |
792c95dd BF |
931 | while (!list_empty(&clp->cl_sessions)) { |
932 | struct nfsd4_session *ses; | |
933 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
934 | se_perclnt); | |
935 | list_del(&ses->se_perclnt); | |
936 | nfsd4_put_session(ses); | |
937 | } | |
1da177e4 LT |
938 | if (clp->cl_cred.cr_group_info) |
939 | put_group_info(clp->cl_cred.cr_group_info); | |
68e76ad0 | 940 | kfree(clp->cl_principal); |
1da177e4 LT |
941 | kfree(clp->cl_name.data); |
942 | kfree(clp); | |
943 | } | |
944 | ||
d7682988 BH |
945 | void |
946 | release_session_client(struct nfsd4_session *session) | |
947 | { | |
948 | struct nfs4_client *clp = session->se_client; | |
949 | ||
950 | if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock)) | |
951 | return; | |
952 | if (is_client_expired(clp)) { | |
953 | free_client(clp); | |
954 | session->se_client = NULL; | |
955 | } else | |
956 | renew_client_locked(clp); | |
957 | spin_unlock(&client_lock); | |
d7682988 BH |
958 | } |
959 | ||
84d38ac9 BH |
960 | /* must be called under the client_lock */ |
961 | static inline void | |
962 | unhash_client_locked(struct nfs4_client *clp) | |
963 | { | |
792c95dd BF |
964 | struct nfsd4_session *ses; |
965 | ||
07cd4909 | 966 | mark_client_expired(clp); |
84d38ac9 | 967 | list_del(&clp->cl_lru); |
4c649378 | 968 | spin_lock(&clp->cl_lock); |
792c95dd BF |
969 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
970 | list_del_init(&ses->se_hash); | |
4c649378 | 971 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
972 | } |
973 | ||
1da177e4 LT |
974 | static void |
975 | expire_client(struct nfs4_client *clp) | |
976 | { | |
fe0750e5 | 977 | struct nfs4_openowner *oo; |
1da177e4 | 978 | struct nfs4_delegation *dp; |
1da177e4 LT |
979 | struct list_head reaplist; |
980 | ||
1da177e4 LT |
981 | INIT_LIST_HEAD(&reaplist); |
982 | spin_lock(&recall_lock); | |
ea1da636 N |
983 | while (!list_empty(&clp->cl_delegations)) { |
984 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
ea1da636 | 985 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
986 | list_move(&dp->dl_recall_lru, &reaplist); |
987 | } | |
988 | spin_unlock(&recall_lock); | |
989 | while (!list_empty(&reaplist)) { | |
990 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
991 | list_del_init(&dp->dl_recall_lru); | |
992 | unhash_delegation(dp); | |
993 | } | |
ea1da636 | 994 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 BF |
995 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
996 | release_openowner(oo); | |
1da177e4 | 997 | } |
6ff8da08 | 998 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
999 | if (clp->cl_cb_conn.cb_xprt) |
1000 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
36acb66b BH |
1001 | list_del(&clp->cl_idhash); |
1002 | list_del(&clp->cl_strhash); | |
be1fdf6c | 1003 | spin_lock(&client_lock); |
84d38ac9 | 1004 | unhash_client_locked(clp); |
46583e25 BH |
1005 | if (atomic_read(&clp->cl_refcount) == 0) |
1006 | free_client(clp); | |
be1fdf6c | 1007 | spin_unlock(&client_lock); |
1da177e4 LT |
1008 | } |
1009 | ||
35bba9a3 BF |
1010 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
1011 | { | |
1012 | memcpy(target->cl_verifier.data, source->data, | |
1013 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
1014 | } |
1015 | ||
35bba9a3 BF |
1016 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
1017 | { | |
1da177e4 LT |
1018 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
1019 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
1020 | } | |
1021 | ||
35bba9a3 BF |
1022 | static void copy_cred(struct svc_cred *target, struct svc_cred *source) |
1023 | { | |
1da177e4 LT |
1024 | target->cr_uid = source->cr_uid; |
1025 | target->cr_gid = source->cr_gid; | |
1026 | target->cr_group_info = source->cr_group_info; | |
1027 | get_group_info(target->cr_group_info); | |
1028 | } | |
1029 | ||
35bba9a3 | 1030 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 1031 | { |
a55370a3 | 1032 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
1033 | } |
1034 | ||
1035 | static int | |
599e0a22 BF |
1036 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1037 | { | |
1038 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
1039 | } |
1040 | ||
1041 | static int | |
599e0a22 BF |
1042 | same_clid(clientid_t *cl1, clientid_t *cl2) |
1043 | { | |
1044 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1045 | } |
1046 | ||
1047 | /* XXX what about NGROUP */ | |
1048 | static int | |
599e0a22 BF |
1049 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
1050 | { | |
1051 | return cr1->cr_uid == cr2->cr_uid; | |
1da177e4 LT |
1052 | } |
1053 | ||
5ec7b46c BF |
1054 | static void gen_clid(struct nfs4_client *clp) |
1055 | { | |
1056 | static u32 current_clientid = 1; | |
1057 | ||
1da177e4 LT |
1058 | clp->cl_clientid.cl_boot = boot_time; |
1059 | clp->cl_clientid.cl_id = current_clientid++; | |
1060 | } | |
1061 | ||
deda2faa BF |
1062 | static void gen_confirm(struct nfs4_client *clp) |
1063 | { | |
1064 | static u32 i; | |
1065 | u32 *p; | |
1da177e4 | 1066 | |
1da177e4 | 1067 | p = (u32 *)clp->cl_confirm.data; |
deda2faa BF |
1068 | *p++ = get_seconds(); |
1069 | *p++ = i++; | |
1da177e4 LT |
1070 | } |
1071 | ||
4581d140 BF |
1072 | static int |
1073 | same_stateid(stateid_t *id_one, stateid_t *id_two) | |
1074 | { | |
1075 | if (id_one->si_stateownerid != id_two->si_stateownerid) | |
1076 | return 0; | |
1077 | return id_one->si_fileid == id_two->si_fileid; | |
1078 | } | |
1079 | ||
dcef0413 | 1080 | static struct nfs4_ol_stateid *find_stateid(stateid_t *t) |
4581d140 | 1081 | { |
dcef0413 | 1082 | struct nfs4_stid *s; |
4581d140 BF |
1083 | unsigned int hashval; |
1084 | ||
1085 | hashval = stateid_hashval(t->si_stateownerid, t->si_fileid); | |
dcef0413 BF |
1086 | list_for_each_entry(s, &stateid_hashtbl[hashval], sc_hash) |
1087 | if (same_stateid(&s->sc_stateid, t)) | |
1088 | return openlockstateid(s); | |
4d71ab87 BF |
1089 | return NULL; |
1090 | } | |
1091 | ||
dcef0413 | 1092 | static struct nfs4_ol_stateid *find_stateid_by_type(stateid_t *t, char typemask) |
4d71ab87 | 1093 | { |
dcef0413 | 1094 | struct nfs4_ol_stateid *s; |
4d71ab87 BF |
1095 | |
1096 | s = find_stateid(t); | |
1097 | if (!s) | |
1098 | return NULL; | |
dcef0413 | 1099 | if (typemask & s->st_stid.sc_type) |
4581d140 | 1100 | return s; |
4581d140 BF |
1101 | return NULL; |
1102 | } | |
1103 | ||
b09333c4 RL |
1104 | static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, |
1105 | struct svc_rqst *rqstp, nfs4_verifier *verf) | |
1106 | { | |
1107 | struct nfs4_client *clp; | |
1108 | struct sockaddr *sa = svc_addr(rqstp); | |
1109 | char *princ; | |
1110 | ||
1111 | clp = alloc_client(name); | |
1112 | if (clp == NULL) | |
1113 | return NULL; | |
1114 | ||
792c95dd BF |
1115 | INIT_LIST_HEAD(&clp->cl_sessions); |
1116 | ||
b09333c4 RL |
1117 | princ = svc_gss_principal(rqstp); |
1118 | if (princ) { | |
1119 | clp->cl_principal = kstrdup(princ, GFP_KERNEL); | |
1120 | if (clp->cl_principal == NULL) { | |
1121 | free_client(clp); | |
1122 | return NULL; | |
1123 | } | |
1124 | } | |
1125 | ||
1126 | memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); | |
46583e25 | 1127 | atomic_set(&clp->cl_refcount, 0); |
77a3569d | 1128 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; |
b09333c4 RL |
1129 | INIT_LIST_HEAD(&clp->cl_idhash); |
1130 | INIT_LIST_HEAD(&clp->cl_strhash); | |
1131 | INIT_LIST_HEAD(&clp->cl_openowners); | |
1132 | INIT_LIST_HEAD(&clp->cl_delegations); | |
b09333c4 | 1133 | INIT_LIST_HEAD(&clp->cl_lru); |
5ce8ba25 | 1134 | INIT_LIST_HEAD(&clp->cl_callbacks); |
6ff8da08 | 1135 | spin_lock_init(&clp->cl_lock); |
cee277d9 | 1136 | INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_do_callback_rpc); |
07cd4909 | 1137 | clp->cl_time = get_seconds(); |
b09333c4 RL |
1138 | clear_bit(0, &clp->cl_cb_slot_busy); |
1139 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1140 | copy_verf(clp, verf); | |
1141 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
1142 | clp->cl_flavor = rqstp->rq_flavor; | |
1143 | copy_cred(&clp->cl_cred, &rqstp->rq_cred); | |
1144 | gen_confirm(clp); | |
edd76786 | 1145 | clp->cl_cb_session = NULL; |
b09333c4 RL |
1146 | return clp; |
1147 | } | |
1148 | ||
35bba9a3 BF |
1149 | static int check_name(struct xdr_netobj name) |
1150 | { | |
1da177e4 LT |
1151 | if (name.len == 0) |
1152 | return 0; | |
1153 | if (name.len > NFS4_OPAQUE_LIMIT) { | |
2fdada03 | 1154 | dprintk("NFSD: check_name: name too long(%d)!\n", name.len); |
1da177e4 LT |
1155 | return 0; |
1156 | } | |
1157 | return 1; | |
1158 | } | |
1159 | ||
fd39ca9a | 1160 | static void |
1da177e4 LT |
1161 | add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) |
1162 | { | |
1163 | unsigned int idhashval; | |
1164 | ||
1165 | list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); | |
1166 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
1167 | list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); | |
36acb66b | 1168 | renew_client(clp); |
1da177e4 LT |
1169 | } |
1170 | ||
fd39ca9a | 1171 | static void |
1da177e4 LT |
1172 | move_to_confirmed(struct nfs4_client *clp) |
1173 | { | |
1174 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
1175 | unsigned int strhashval; | |
1176 | ||
1177 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
f116629d | 1178 | list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); |
a55370a3 | 1179 | strhashval = clientstr_hashval(clp->cl_recdir); |
328efbab | 1180 | list_move(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); |
1da177e4 LT |
1181 | renew_client(clp); |
1182 | } | |
1183 | ||
1184 | static struct nfs4_client * | |
1185 | find_confirmed_client(clientid_t *clid) | |
1186 | { | |
1187 | struct nfs4_client *clp; | |
1188 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1189 | ||
1190 | list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 1191 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
1192 | return clp; |
1193 | } | |
1194 | return NULL; | |
1195 | } | |
1196 | ||
1197 | static struct nfs4_client * | |
1198 | find_unconfirmed_client(clientid_t *clid) | |
1199 | { | |
1200 | struct nfs4_client *clp; | |
1201 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1202 | ||
1203 | list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 1204 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
1205 | return clp; |
1206 | } | |
1207 | return NULL; | |
1208 | } | |
1209 | ||
6e5f15c9 | 1210 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 1211 | { |
6e5f15c9 | 1212 | return clp->cl_exchange_flags != 0; |
e203d506 | 1213 | } |
a1bcecd2 | 1214 | |
28ce6054 | 1215 | static struct nfs4_client * |
e203d506 | 1216 | find_confirmed_client_by_str(const char *dname, unsigned int hashval) |
28ce6054 N |
1217 | { |
1218 | struct nfs4_client *clp; | |
1219 | ||
1220 | list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { | |
e203d506 | 1221 | if (same_name(clp->cl_recdir, dname)) |
28ce6054 N |
1222 | return clp; |
1223 | } | |
1224 | return NULL; | |
1225 | } | |
1226 | ||
1227 | static struct nfs4_client * | |
e203d506 | 1228 | find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) |
28ce6054 N |
1229 | { |
1230 | struct nfs4_client *clp; | |
1231 | ||
1232 | list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { | |
e203d506 | 1233 | if (same_name(clp->cl_recdir, dname)) |
28ce6054 N |
1234 | return clp; |
1235 | } | |
1236 | return NULL; | |
1237 | } | |
1238 | ||
6f3d772f TU |
1239 | static void rpc_svcaddr2sockaddr(struct sockaddr *sa, unsigned short family, union svc_addr_u *svcaddr) |
1240 | { | |
1241 | switch (family) { | |
1242 | case AF_INET: | |
1243 | ((struct sockaddr_in *)sa)->sin_family = AF_INET; | |
1244 | ((struct sockaddr_in *)sa)->sin_addr = svcaddr->addr; | |
1245 | return; | |
1246 | case AF_INET6: | |
1247 | ((struct sockaddr_in6 *)sa)->sin6_family = AF_INET6; | |
1248 | ((struct sockaddr_in6 *)sa)->sin6_addr = svcaddr->addr6; | |
1249 | return; | |
1250 | } | |
1251 | } | |
1252 | ||
fd39ca9a | 1253 | static void |
6f3d772f | 1254 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 1255 | { |
07263f1e | 1256 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
1257 | struct sockaddr *sa = svc_addr(rqstp); |
1258 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
1259 | unsigned short expected_family; |
1260 | ||
1261 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
1262 | if (se->se_callback_netid_len == 3 && | |
1263 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
1264 | expected_family = AF_INET; | |
1265 | else if (se->se_callback_netid_len == 4 && | |
1266 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
1267 | expected_family = AF_INET6; | |
1268 | else | |
1da177e4 LT |
1269 | goto out_err; |
1270 | ||
07263f1e | 1271 | conn->cb_addrlen = rpc_uaddr2sockaddr(se->se_callback_addr_val, |
aa9a4ec7 | 1272 | se->se_callback_addr_len, |
07263f1e BF |
1273 | (struct sockaddr *)&conn->cb_addr, |
1274 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 1275 | |
07263f1e | 1276 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 1277 | goto out_err; |
aa9a4ec7 | 1278 | |
07263f1e BF |
1279 | if (conn->cb_addr.ss_family == AF_INET6) |
1280 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 1281 | |
07263f1e BF |
1282 | conn->cb_prog = se->se_callback_prog; |
1283 | conn->cb_ident = se->se_callback_ident; | |
6f3d772f | 1284 | rpc_svcaddr2sockaddr((struct sockaddr *)&conn->cb_saddr, expected_family, &rqstp->rq_daddr); |
1da177e4 LT |
1285 | return; |
1286 | out_err: | |
07263f1e BF |
1287 | conn->cb_addr.ss_family = AF_UNSPEC; |
1288 | conn->cb_addrlen = 0; | |
849823c5 | 1289 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
1290 | "will not receive delegations\n", |
1291 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
1292 | ||
1da177e4 LT |
1293 | return; |
1294 | } | |
1295 | ||
074fe897 | 1296 | /* |
557ce264 | 1297 | * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. |
074fe897 | 1298 | */ |
074fe897 AA |
1299 | void |
1300 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) | |
074fe897 | 1301 | { |
557ce264 AA |
1302 | struct nfsd4_slot *slot = resp->cstate.slot; |
1303 | unsigned int base; | |
074fe897 | 1304 | |
557ce264 | 1305 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1306 | |
557ce264 AA |
1307 | slot->sl_opcnt = resp->opcnt; |
1308 | slot->sl_status = resp->cstate.status; | |
074fe897 | 1309 | |
bf864a31 | 1310 | if (nfsd4_not_cached(resp)) { |
557ce264 | 1311 | slot->sl_datalen = 0; |
bf864a31 | 1312 | return; |
074fe897 | 1313 | } |
557ce264 AA |
1314 | slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; |
1315 | base = (char *)resp->cstate.datap - | |
1316 | (char *)resp->xbuf->head[0].iov_base; | |
1317 | if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, | |
1318 | slot->sl_datalen)) | |
1319 | WARN("%s: sessions DRC could not cache compound\n", __func__); | |
1320 | return; | |
074fe897 AA |
1321 | } |
1322 | ||
1323 | /* | |
abfabf8c AA |
1324 | * Encode the replay sequence operation from the slot values. |
1325 | * If cachethis is FALSE encode the uncached rep error on the next | |
1326 | * operation which sets resp->p and increments resp->opcnt for | |
1327 | * nfs4svc_encode_compoundres. | |
074fe897 | 1328 | * |
074fe897 | 1329 | */ |
abfabf8c AA |
1330 | static __be32 |
1331 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
1332 | struct nfsd4_compoundres *resp) | |
074fe897 | 1333 | { |
abfabf8c AA |
1334 | struct nfsd4_op *op; |
1335 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 1336 | |
abfabf8c | 1337 | dprintk("--> %s resp->opcnt %d cachethis %u \n", __func__, |
557ce264 | 1338 | resp->opcnt, resp->cstate.slot->sl_cachethis); |
bf864a31 | 1339 | |
abfabf8c AA |
1340 | /* Encode the replayed sequence operation */ |
1341 | op = &args->ops[resp->opcnt - 1]; | |
1342 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 1343 | |
abfabf8c | 1344 | /* Return nfserr_retry_uncached_rep in next operation. */ |
557ce264 | 1345 | if (args->opcnt > 1 && slot->sl_cachethis == 0) { |
abfabf8c AA |
1346 | op = &args->ops[resp->opcnt++]; |
1347 | op->status = nfserr_retry_uncached_rep; | |
1348 | nfsd4_encode_operation(resp, op); | |
074fe897 | 1349 | } |
abfabf8c | 1350 | return op->status; |
074fe897 AA |
1351 | } |
1352 | ||
1353 | /* | |
557ce264 AA |
1354 | * The sequence operation is not cached because we can use the slot and |
1355 | * session values. | |
074fe897 AA |
1356 | */ |
1357 | __be32 | |
bf864a31 AA |
1358 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
1359 | struct nfsd4_sequence *seq) | |
074fe897 | 1360 | { |
557ce264 | 1361 | struct nfsd4_slot *slot = resp->cstate.slot; |
074fe897 AA |
1362 | __be32 status; |
1363 | ||
557ce264 | 1364 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1365 | |
abfabf8c AA |
1366 | /* Either returns 0 or nfserr_retry_uncached */ |
1367 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); | |
1368 | if (status == nfserr_retry_uncached_rep) | |
1369 | return status; | |
074fe897 | 1370 | |
557ce264 AA |
1371 | /* The sequence operation has been encoded, cstate->datap set. */ |
1372 | memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); | |
074fe897 | 1373 | |
557ce264 AA |
1374 | resp->opcnt = slot->sl_opcnt; |
1375 | resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); | |
1376 | status = slot->sl_status; | |
074fe897 AA |
1377 | |
1378 | return status; | |
1379 | } | |
1380 | ||
0733d213 AA |
1381 | /* |
1382 | * Set the exchange_id flags returned by the server. | |
1383 | */ | |
1384 | static void | |
1385 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
1386 | { | |
1387 | /* pNFS is not supported */ | |
1388 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
1389 | ||
1390 | /* Referrals are supported, Migration is not. */ | |
1391 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
1392 | ||
1393 | /* set the wire flags to return to client. */ | |
1394 | clid->flags = new->cl_exchange_flags; | |
1395 | } | |
1396 | ||
069b6ad4 AA |
1397 | __be32 |
1398 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
1399 | struct nfsd4_compound_state *cstate, | |
1400 | struct nfsd4_exchange_id *exid) | |
1401 | { | |
0733d213 AA |
1402 | struct nfs4_client *unconf, *conf, *new; |
1403 | int status; | |
1404 | unsigned int strhashval; | |
1405 | char dname[HEXDIR_LEN]; | |
363168b4 | 1406 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 1407 | nfs4_verifier verf = exid->verifier; |
363168b4 | 1408 | struct sockaddr *sa = svc_addr(rqstp); |
0733d213 | 1409 | |
363168b4 | 1410 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 1411 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 1412 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 1413 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 1414 | addr_str, exid->flags, exid->spa_how); |
0733d213 AA |
1415 | |
1416 | if (!check_name(exid->clname) || (exid->flags & ~EXCHGID4_FLAG_MASK_A)) | |
1417 | return nfserr_inval; | |
1418 | ||
1419 | /* Currently only support SP4_NONE */ | |
1420 | switch (exid->spa_how) { | |
1421 | case SP4_NONE: | |
1422 | break; | |
1423 | case SP4_SSV: | |
044bc1d4 | 1424 | return nfserr_serverfault; |
0733d213 AA |
1425 | default: |
1426 | BUG(); /* checked by xdr code */ | |
1427 | case SP4_MACH_CRED: | |
1428 | return nfserr_serverfault; /* no excuse :-/ */ | |
1429 | } | |
1430 | ||
1431 | status = nfs4_make_rec_clidname(dname, &exid->clname); | |
1432 | ||
1433 | if (status) | |
1434 | goto error; | |
1435 | ||
1436 | strhashval = clientstr_hashval(dname); | |
1437 | ||
1438 | nfs4_lock_state(); | |
1439 | status = nfs_ok; | |
1440 | ||
e203d506 | 1441 | conf = find_confirmed_client_by_str(dname, strhashval); |
0733d213 | 1442 | if (conf) { |
e203d506 BF |
1443 | if (!clp_used_exchangeid(conf)) { |
1444 | status = nfserr_clid_inuse; /* XXX: ? */ | |
1445 | goto out; | |
1446 | } | |
0733d213 AA |
1447 | if (!same_verf(&verf, &conf->cl_verifier)) { |
1448 | /* 18.35.4 case 8 */ | |
1449 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1450 | status = nfserr_not_same; | |
1451 | goto out; | |
1452 | } | |
1453 | /* Client reboot: destroy old state */ | |
1454 | expire_client(conf); | |
1455 | goto out_new; | |
1456 | } | |
1457 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { | |
1458 | /* 18.35.4 case 9 */ | |
1459 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1460 | status = nfserr_perm; | |
1461 | goto out; | |
1462 | } | |
1463 | expire_client(conf); | |
1464 | goto out_new; | |
1465 | } | |
0733d213 AA |
1466 | /* |
1467 | * Set bit when the owner id and verifier map to an already | |
1468 | * confirmed client id (18.35.3). | |
1469 | */ | |
1470 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
1471 | ||
1472 | /* | |
1473 | * Falling into 18.35.4 case 2, possible router replay. | |
1474 | * Leave confirmed record intact and return same result. | |
1475 | */ | |
1476 | copy_verf(conf, &verf); | |
1477 | new = conf; | |
1478 | goto out_copy; | |
6ddbbbfe MS |
1479 | } |
1480 | ||
1481 | /* 18.35.4 case 7 */ | |
1482 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1483 | status = nfserr_noent; | |
1484 | goto out; | |
0733d213 AA |
1485 | } |
1486 | ||
e203d506 | 1487 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
0733d213 AA |
1488 | if (unconf) { |
1489 | /* | |
1490 | * Possible retry or client restart. Per 18.35.4 case 4, | |
1491 | * a new unconfirmed record should be generated regardless | |
1492 | * of whether any properties have changed. | |
1493 | */ | |
1494 | expire_client(unconf); | |
1495 | } | |
1496 | ||
1497 | out_new: | |
1498 | /* Normal case */ | |
b09333c4 | 1499 | new = create_client(exid->clname, dname, rqstp, &verf); |
0733d213 | 1500 | if (new == NULL) { |
4731030d | 1501 | status = nfserr_jukebox; |
0733d213 AA |
1502 | goto out; |
1503 | } | |
1504 | ||
0733d213 | 1505 | gen_clid(new); |
0733d213 AA |
1506 | add_to_unconfirmed(new, strhashval); |
1507 | out_copy: | |
1508 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
1509 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
1510 | ||
38eb76a5 | 1511 | exid->seqid = 1; |
0733d213 AA |
1512 | nfsd4_set_ex_flags(new, exid); |
1513 | ||
1514 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
49557cc7 | 1515 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
1516 | status = nfs_ok; |
1517 | ||
1518 | out: | |
1519 | nfs4_unlock_state(); | |
1520 | error: | |
1521 | dprintk("nfsd4_exchange_id returns %d\n", ntohl(status)); | |
1522 | return status; | |
069b6ad4 AA |
1523 | } |
1524 | ||
b85d4c01 | 1525 | static int |
88e588d5 | 1526 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 1527 | { |
88e588d5 AA |
1528 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
1529 | slot_seqid); | |
b85d4c01 BH |
1530 | |
1531 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
1532 | if (slot_inuse) { |
1533 | if (seqid == slot_seqid) | |
b85d4c01 BH |
1534 | return nfserr_jukebox; |
1535 | else | |
1536 | return nfserr_seq_misordered; | |
1537 | } | |
1538 | /* Normal */ | |
88e588d5 | 1539 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 BH |
1540 | return nfs_ok; |
1541 | /* Replay */ | |
88e588d5 | 1542 | if (seqid == slot_seqid) |
b85d4c01 BH |
1543 | return nfserr_replay_cache; |
1544 | /* Wraparound */ | |
88e588d5 | 1545 | if (seqid == 1 && (slot_seqid + 1) == 0) |
b85d4c01 BH |
1546 | return nfs_ok; |
1547 | /* Misordered replay or misordered new request */ | |
1548 | return nfserr_seq_misordered; | |
1549 | } | |
1550 | ||
49557cc7 AA |
1551 | /* |
1552 | * Cache the create session result into the create session single DRC | |
1553 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
1554 | * Do this for solo or embedded create session operations. | |
1555 | */ | |
1556 | static void | |
1557 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
1558 | struct nfsd4_clid_slot *slot, int nfserr) | |
1559 | { | |
1560 | slot->sl_status = nfserr; | |
1561 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
1562 | } | |
1563 | ||
1564 | static __be32 | |
1565 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
1566 | struct nfsd4_clid_slot *slot) | |
1567 | { | |
1568 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
1569 | return slot->sl_status; | |
1570 | } | |
1571 | ||
1b74c25b MJ |
1572 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
1573 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
1574 | 1 + /* MIN tag is length with zero, only length */ \ | |
1575 | 3 + /* version, opcount, opcode */ \ | |
1576 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1577 | /* seqid, slotID, slotID, cache */ \ | |
1578 | 4 ) * sizeof(__be32)) | |
1579 | ||
1580 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
1581 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
1582 | 1 + /* status */ \ | |
1583 | 1 + /* MIN tag is length with zero, only length */ \ | |
1584 | 3 + /* opcount, opcode, opstatus*/ \ | |
1585 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1586 | /* seqid, slotID, slotID, slotID, status */ \ | |
1587 | 5 ) * sizeof(__be32)) | |
1588 | ||
1589 | static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs fchannel) | |
1590 | { | |
1591 | return fchannel.maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ | |
1592 | || fchannel.maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ; | |
1593 | } | |
1594 | ||
069b6ad4 AA |
1595 | __be32 |
1596 | nfsd4_create_session(struct svc_rqst *rqstp, | |
1597 | struct nfsd4_compound_state *cstate, | |
1598 | struct nfsd4_create_session *cr_ses) | |
1599 | { | |
363168b4 | 1600 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 1601 | struct nfs4_client *conf, *unconf; |
ac7c46f2 | 1602 | struct nfsd4_session *new; |
49557cc7 | 1603 | struct nfsd4_clid_slot *cs_slot = NULL; |
86c3e16c | 1604 | bool confirm_me = false; |
ec6b5d7b AA |
1605 | int status = 0; |
1606 | ||
a62573dc MJ |
1607 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
1608 | return nfserr_inval; | |
1609 | ||
ec6b5d7b AA |
1610 | nfs4_lock_state(); |
1611 | unconf = find_unconfirmed_client(&cr_ses->clientid); | |
1612 | conf = find_confirmed_client(&cr_ses->clientid); | |
1613 | ||
1614 | if (conf) { | |
49557cc7 AA |
1615 | cs_slot = &conf->cl_cs_slot; |
1616 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 1617 | if (status == nfserr_replay_cache) { |
ec6b5d7b | 1618 | dprintk("Got a create_session replay! seqid= %d\n", |
49557cc7 | 1619 | cs_slot->sl_seqid); |
38eb76a5 | 1620 | /* Return the cached reply status */ |
49557cc7 | 1621 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
38eb76a5 | 1622 | goto out; |
49557cc7 | 1623 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b AA |
1624 | status = nfserr_seq_misordered; |
1625 | dprintk("Sequence misordered!\n"); | |
1626 | dprintk("Expected seqid= %d but got seqid= %d\n", | |
49557cc7 | 1627 | cs_slot->sl_seqid, cr_ses->seqid); |
ec6b5d7b AA |
1628 | goto out; |
1629 | } | |
ec6b5d7b AA |
1630 | } else if (unconf) { |
1631 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || | |
363168b4 | 1632 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b AA |
1633 | status = nfserr_clid_inuse; |
1634 | goto out; | |
1635 | } | |
1636 | ||
49557cc7 AA |
1637 | cs_slot = &unconf->cl_cs_slot; |
1638 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
1639 | if (status) { |
1640 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 1641 | status = nfserr_seq_misordered; |
cd5b8144 | 1642 | goto out; |
ec6b5d7b AA |
1643 | } |
1644 | ||
86c3e16c | 1645 | confirm_me = true; |
ec6b5d7b AA |
1646 | conf = unconf; |
1647 | } else { | |
1648 | status = nfserr_stale_clientid; | |
1649 | goto out; | |
1650 | } | |
1651 | ||
8323c3b2 BF |
1652 | /* |
1653 | * XXX: we should probably set this at creation time, and check | |
1654 | * for consistent minorversion use throughout: | |
1655 | */ | |
1656 | conf->cl_minorversion = 1; | |
408b79bc BF |
1657 | /* |
1658 | * We do not support RDMA or persistent sessions | |
1659 | */ | |
1660 | cr_ses->flags &= ~SESSION4_PERSIST; | |
1661 | cr_ses->flags &= ~SESSION4_RDMA; | |
1662 | ||
1b74c25b MJ |
1663 | status = nfserr_toosmall; |
1664 | if (check_forechannel_attrs(cr_ses->fore_channel)) | |
1665 | goto out; | |
1666 | ||
ac7c46f2 BF |
1667 | status = nfserr_jukebox; |
1668 | new = alloc_init_session(rqstp, conf, cr_ses); | |
1669 | if (!new) | |
ec6b5d7b | 1670 | goto out; |
ac7c46f2 BF |
1671 | status = nfs_ok; |
1672 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, | |
ec6b5d7b | 1673 | NFS4_MAX_SESSIONID_LEN); |
12050657 MJ |
1674 | memcpy(&cr_ses->fore_channel, &new->se_fchannel, |
1675 | sizeof(struct nfsd4_channel_attrs)); | |
86c3e16c | 1676 | cs_slot->sl_seqid++; |
49557cc7 | 1677 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 1678 | |
49557cc7 AA |
1679 | /* cache solo and embedded create sessions under the state lock */ |
1680 | nfsd4_cache_create_session(cr_ses, cs_slot, status); | |
86c3e16c BF |
1681 | if (confirm_me) |
1682 | move_to_confirmed(conf); | |
ec6b5d7b AA |
1683 | out: |
1684 | nfs4_unlock_state(); | |
1685 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1686 | return status; | |
069b6ad4 AA |
1687 | } |
1688 | ||
57716355 BF |
1689 | static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) |
1690 | { | |
1691 | struct nfsd4_compoundres *resp = rqstp->rq_resp; | |
1692 | struct nfsd4_compoundargs *argp = rqstp->rq_argp; | |
1693 | ||
1694 | return argp->opcnt == resp->opcnt; | |
1695 | } | |
1696 | ||
1d1bc8f2 BF |
1697 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
1698 | { | |
1699 | switch (*dir) { | |
1700 | case NFS4_CDFC4_FORE: | |
1701 | case NFS4_CDFC4_BACK: | |
1702 | return nfs_ok; | |
1703 | case NFS4_CDFC4_FORE_OR_BOTH: | |
1704 | case NFS4_CDFC4_BACK_OR_BOTH: | |
1705 | *dir = NFS4_CDFC4_BOTH; | |
1706 | return nfs_ok; | |
1707 | }; | |
1708 | return nfserr_inval; | |
1709 | } | |
1710 | ||
1711 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, | |
1712 | struct nfsd4_compound_state *cstate, | |
1713 | struct nfsd4_bind_conn_to_session *bcts) | |
1714 | { | |
1715 | __be32 status; | |
1716 | ||
1717 | if (!nfsd4_last_compound_op(rqstp)) | |
1718 | return nfserr_not_only_op; | |
1719 | spin_lock(&client_lock); | |
1720 | cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid); | |
1721 | /* Sorta weird: we only need the refcnt'ing because new_conn acquires | |
1722 | * client_lock iself: */ | |
1723 | if (cstate->session) { | |
1724 | nfsd4_get_session(cstate->session); | |
1725 | atomic_inc(&cstate->session->se_client->cl_refcount); | |
1726 | } | |
1727 | spin_unlock(&client_lock); | |
1728 | if (!cstate->session) | |
1729 | return nfserr_badsession; | |
1730 | ||
1731 | status = nfsd4_map_bcts_dir(&bcts->dir); | |
1db2b9dd BS |
1732 | if (!status) |
1733 | nfsd4_new_conn(rqstp, cstate->session, bcts->dir); | |
1734 | return status; | |
1d1bc8f2 BF |
1735 | } |
1736 | ||
5d4cec2f BF |
1737 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
1738 | { | |
1739 | if (!session) | |
1740 | return 0; | |
1741 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
1742 | } | |
1743 | ||
069b6ad4 AA |
1744 | __be32 |
1745 | nfsd4_destroy_session(struct svc_rqst *r, | |
1746 | struct nfsd4_compound_state *cstate, | |
1747 | struct nfsd4_destroy_session *sessionid) | |
1748 | { | |
e10e0cfc BH |
1749 | struct nfsd4_session *ses; |
1750 | u32 status = nfserr_badsession; | |
1751 | ||
1752 | /* Notes: | |
1753 | * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid | |
1754 | * - Should we return nfserr_back_chan_busy if waiting for | |
1755 | * callbacks on to-be-destroyed session? | |
1756 | * - Do we need to clear any callback info from previous session? | |
1757 | */ | |
1758 | ||
5d4cec2f | 1759 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 BF |
1760 | if (!nfsd4_last_compound_op(r)) |
1761 | return nfserr_not_only_op; | |
1762 | } | |
e10e0cfc | 1763 | dump_sessionid(__func__, &sessionid->sessionid); |
9089f1b4 | 1764 | spin_lock(&client_lock); |
e10e0cfc BH |
1765 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid); |
1766 | if (!ses) { | |
9089f1b4 | 1767 | spin_unlock(&client_lock); |
e10e0cfc BH |
1768 | goto out; |
1769 | } | |
1770 | ||
1771 | unhash_session(ses); | |
9089f1b4 | 1772 | spin_unlock(&client_lock); |
e10e0cfc | 1773 | |
ab707e15 | 1774 | nfs4_lock_state(); |
84f5f7cc | 1775 | nfsd4_probe_callback_sync(ses->se_client); |
ab707e15 | 1776 | nfs4_unlock_state(); |
19cf5c02 BF |
1777 | |
1778 | nfsd4_del_conns(ses); | |
1779 | ||
e10e0cfc BH |
1780 | nfsd4_put_session(ses); |
1781 | status = nfs_ok; | |
1782 | out: | |
1783 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1784 | return status; | |
069b6ad4 AA |
1785 | } |
1786 | ||
a663bdd8 | 1787 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
1788 | { |
1789 | struct nfsd4_conn *c; | |
1790 | ||
1791 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 1792 | if (c->cn_xprt == xpt) { |
328ead28 BF |
1793 | return c; |
1794 | } | |
1795 | } | |
1796 | return NULL; | |
1797 | } | |
1798 | ||
a663bdd8 | 1799 | static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
1800 | { |
1801 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 1802 | struct nfsd4_conn *c; |
21b75b01 | 1803 | int ret; |
328ead28 BF |
1804 | |
1805 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 1806 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
328ead28 BF |
1807 | if (c) { |
1808 | spin_unlock(&clp->cl_lock); | |
1809 | free_conn(new); | |
1810 | return; | |
1811 | } | |
1812 | __nfsd4_hash_conn(new, ses); | |
1813 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
1814 | ret = nfsd4_register_conn(new); |
1815 | if (ret) | |
1816 | /* oops; xprt is already down: */ | |
1817 | nfsd4_conn_lost(&new->cn_xpt_user); | |
328ead28 BF |
1818 | return; |
1819 | } | |
1820 | ||
868b89c3 MJ |
1821 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
1822 | { | |
1823 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
1824 | ||
1825 | return args->opcnt > session->se_fchannel.maxops; | |
1826 | } | |
1827 | ||
ae82a8d0 MJ |
1828 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
1829 | struct nfsd4_session *session) | |
1830 | { | |
1831 | struct xdr_buf *xb = &rqstp->rq_arg; | |
1832 | ||
1833 | return xb->len > session->se_fchannel.maxreq_sz; | |
1834 | } | |
1835 | ||
069b6ad4 | 1836 | __be32 |
b85d4c01 | 1837 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
1838 | struct nfsd4_compound_state *cstate, |
1839 | struct nfsd4_sequence *seq) | |
1840 | { | |
f9bb94c4 | 1841 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
b85d4c01 BH |
1842 | struct nfsd4_session *session; |
1843 | struct nfsd4_slot *slot; | |
a663bdd8 | 1844 | struct nfsd4_conn *conn; |
b85d4c01 BH |
1845 | int status; |
1846 | ||
f9bb94c4 AA |
1847 | if (resp->opcnt != 1) |
1848 | return nfserr_sequence_pos; | |
1849 | ||
a663bdd8 BF |
1850 | /* |
1851 | * Will be either used or freed by nfsd4_sequence_check_conn | |
1852 | * below. | |
1853 | */ | |
1854 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
1855 | if (!conn) | |
1856 | return nfserr_jukebox; | |
1857 | ||
9089f1b4 | 1858 | spin_lock(&client_lock); |
b85d4c01 BH |
1859 | status = nfserr_badsession; |
1860 | session = find_in_sessionid_hashtbl(&seq->sessionid); | |
1861 | if (!session) | |
1862 | goto out; | |
1863 | ||
868b89c3 MJ |
1864 | status = nfserr_too_many_ops; |
1865 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
1866 | goto out; | |
1867 | ||
ae82a8d0 MJ |
1868 | status = nfserr_req_too_big; |
1869 | if (nfsd4_request_too_big(rqstp, session)) | |
1870 | goto out; | |
1871 | ||
b85d4c01 | 1872 | status = nfserr_badslot; |
6c18ba9f | 1873 | if (seq->slotid >= session->se_fchannel.maxreqs) |
b85d4c01 BH |
1874 | goto out; |
1875 | ||
557ce264 | 1876 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
1877 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
1878 | ||
a8dfdaeb AA |
1879 | /* We do not negotiate the number of slots yet, so set the |
1880 | * maxslots to the session maxreqs which is used to encode | |
1881 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
1882 | seq->maxslots = session->se_fchannel.maxreqs; | |
1883 | ||
88e588d5 | 1884 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, slot->sl_inuse); |
b85d4c01 BH |
1885 | if (status == nfserr_replay_cache) { |
1886 | cstate->slot = slot; | |
1887 | cstate->session = session; | |
da3846a2 | 1888 | /* Return the cached reply status and set cstate->status |
557ce264 | 1889 | * for nfsd4_proc_compound processing */ |
bf864a31 | 1890 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 1891 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 1892 | goto out; |
b85d4c01 BH |
1893 | } |
1894 | if (status) | |
1895 | goto out; | |
1896 | ||
a663bdd8 BF |
1897 | nfsd4_sequence_check_conn(conn, session); |
1898 | conn = NULL; | |
328ead28 | 1899 | |
b85d4c01 BH |
1900 | /* Success! bump slot seqid */ |
1901 | slot->sl_inuse = true; | |
1902 | slot->sl_seqid = seq->seqid; | |
557ce264 | 1903 | slot->sl_cachethis = seq->cachethis; |
b85d4c01 BH |
1904 | |
1905 | cstate->slot = slot; | |
1906 | cstate->session = session; | |
1907 | ||
b85d4c01 | 1908 | out: |
26c0c75e | 1909 | /* Hold a session reference until done processing the compound. */ |
aaf84eb9 | 1910 | if (cstate->session) { |
0d7bb719 BF |
1911 | struct nfs4_client *clp = session->se_client; |
1912 | ||
36acb66b | 1913 | nfsd4_get_session(cstate->session); |
0d7bb719 BF |
1914 | atomic_inc(&clp->cl_refcount); |
1915 | if (clp->cl_cb_state == NFSD4_CB_DOWN) | |
1916 | seq->status_flags |= SEQ4_STATUS_CB_PATH_DOWN; | |
aaf84eb9 | 1917 | } |
a663bdd8 | 1918 | kfree(conn); |
36acb66b | 1919 | spin_unlock(&client_lock); |
b85d4c01 BH |
1920 | dprintk("%s: return %d\n", __func__, ntohl(status)); |
1921 | return status; | |
069b6ad4 AA |
1922 | } |
1923 | ||
4dc6ec00 BF |
1924 | __be32 |
1925 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
1926 | { | |
bcecf1cc MJ |
1927 | int status = 0; |
1928 | ||
4dc6ec00 BF |
1929 | if (rc->rca_one_fs) { |
1930 | if (!cstate->current_fh.fh_dentry) | |
1931 | return nfserr_nofilehandle; | |
1932 | /* | |
1933 | * We don't take advantage of the rca_one_fs case. | |
1934 | * That's OK, it's optional, we can safely ignore it. | |
1935 | */ | |
1936 | return nfs_ok; | |
1937 | } | |
bcecf1cc | 1938 | |
4dc6ec00 | 1939 | nfs4_lock_state(); |
bcecf1cc MJ |
1940 | status = nfserr_complete_already; |
1941 | if (cstate->session->se_client->cl_firststate) | |
1942 | goto out; | |
1943 | ||
1944 | status = nfserr_stale_clientid; | |
1945 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
1946 | /* |
1947 | * The following error isn't really legal. | |
1948 | * But we only get here if the client just explicitly | |
1949 | * destroyed the client. Surely it no longer cares what | |
1950 | * error it gets back on an operation for the dead | |
1951 | * client. | |
1952 | */ | |
bcecf1cc MJ |
1953 | goto out; |
1954 | ||
1955 | status = nfs_ok; | |
4dc6ec00 | 1956 | nfsd4_create_clid_dir(cstate->session->se_client); |
bcecf1cc | 1957 | out: |
4dc6ec00 | 1958 | nfs4_unlock_state(); |
bcecf1cc | 1959 | return status; |
4dc6ec00 BF |
1960 | } |
1961 | ||
b37ad28b | 1962 | __be32 |
b591480b BF |
1963 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
1964 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 1965 | { |
1da177e4 LT |
1966 | struct xdr_netobj clname = { |
1967 | .len = setclid->se_namelen, | |
1968 | .data = setclid->se_name, | |
1969 | }; | |
1970 | nfs4_verifier clverifier = setclid->se_verf; | |
1971 | unsigned int strhashval; | |
28ce6054 | 1972 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 1973 | __be32 status; |
a55370a3 | 1974 | char dname[HEXDIR_LEN]; |
1da177e4 | 1975 | |
1da177e4 | 1976 | if (!check_name(clname)) |
73aea4ec | 1977 | return nfserr_inval; |
1da177e4 | 1978 | |
a55370a3 N |
1979 | status = nfs4_make_rec_clidname(dname, &clname); |
1980 | if (status) | |
73aea4ec | 1981 | return status; |
a55370a3 | 1982 | |
1da177e4 LT |
1983 | /* |
1984 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
1985 | * We get here on a DRC miss. | |
1986 | */ | |
1987 | ||
a55370a3 | 1988 | strhashval = clientstr_hashval(dname); |
1da177e4 | 1989 | |
1da177e4 | 1990 | nfs4_lock_state(); |
e203d506 | 1991 | conf = find_confirmed_client_by_str(dname, strhashval); |
28ce6054 | 1992 | if (conf) { |
a186e767 | 1993 | /* RFC 3530 14.2.33 CASE 0: */ |
1da177e4 | 1994 | status = nfserr_clid_inuse; |
e203d506 BF |
1995 | if (clp_used_exchangeid(conf)) |
1996 | goto out; | |
026722c2 | 1997 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
1998 | char addr_str[INET6_ADDRSTRLEN]; |
1999 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
2000 | sizeof(addr_str)); | |
2001 | dprintk("NFSD: setclientid: string in use by client " | |
2002 | "at %s\n", addr_str); | |
1da177e4 LT |
2003 | goto out; |
2004 | } | |
1da177e4 | 2005 | } |
a186e767 BF |
2006 | /* |
2007 | * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") | |
2008 | * has a description of SETCLIENTID request processing consisting | |
2009 | * of 5 bullet points, labeled as CASE0 - CASE4 below. | |
2010 | */ | |
e203d506 | 2011 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
3e772463 | 2012 | status = nfserr_jukebox; |
1da177e4 | 2013 | if (!conf) { |
a186e767 BF |
2014 | /* |
2015 | * RFC 3530 14.2.33 CASE 4: | |
2016 | * placed first, because it is the normal case | |
1da177e4 LT |
2017 | */ |
2018 | if (unconf) | |
2019 | expire_client(unconf); | |
b09333c4 | 2020 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 2021 | if (new == NULL) |
1da177e4 | 2022 | goto out; |
1da177e4 | 2023 | gen_clid(new); |
599e0a22 | 2024 | } else if (same_verf(&conf->cl_verifier, &clverifier)) { |
1da177e4 | 2025 | /* |
a186e767 BF |
2026 | * RFC 3530 14.2.33 CASE 1: |
2027 | * probable callback update | |
1da177e4 | 2028 | */ |
31f4a6c1 N |
2029 | if (unconf) { |
2030 | /* Note this is removing unconfirmed {*x***}, | |
2031 | * which is stronger than RFC recommended {vxc**}. | |
2032 | * This has the advantage that there is at most | |
2033 | * one {*x***} in either list at any time. | |
2034 | */ | |
2035 | expire_client(unconf); | |
1da177e4 | 2036 | } |
b09333c4 | 2037 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 2038 | if (new == NULL) |
1da177e4 | 2039 | goto out; |
1da177e4 | 2040 | copy_clid(new, conf); |
1da177e4 LT |
2041 | } else if (!unconf) { |
2042 | /* | |
a186e767 BF |
2043 | * RFC 3530 14.2.33 CASE 2: |
2044 | * probable client reboot; state will be removed if | |
2045 | * confirmed. | |
1da177e4 | 2046 | */ |
b09333c4 | 2047 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 2048 | if (new == NULL) |
1da177e4 | 2049 | goto out; |
1da177e4 | 2050 | gen_clid(new); |
49ba8781 | 2051 | } else { |
a186e767 BF |
2052 | /* |
2053 | * RFC 3530 14.2.33 CASE 3: | |
2054 | * probable client reboot; state will be removed if | |
2055 | * confirmed. | |
1da177e4 LT |
2056 | */ |
2057 | expire_client(unconf); | |
b09333c4 | 2058 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 2059 | if (new == NULL) |
1da177e4 | 2060 | goto out; |
1da177e4 | 2061 | gen_clid(new); |
1da177e4 | 2062 | } |
8323c3b2 BF |
2063 | /* |
2064 | * XXX: we should probably set this at creation time, and check | |
2065 | * for consistent minorversion use throughout: | |
2066 | */ | |
2067 | new->cl_minorversion = 0; | |
6f3d772f | 2068 | gen_callback(new, setclid, rqstp); |
c175b83c | 2069 | add_to_unconfirmed(new, strhashval); |
1da177e4 LT |
2070 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
2071 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
2072 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
2073 | status = nfs_ok; | |
2074 | out: | |
2075 | nfs4_unlock_state(); | |
2076 | return status; | |
2077 | } | |
2078 | ||
2079 | ||
2080 | /* | |
a186e767 BF |
2081 | * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has |
2082 | * a description of SETCLIENTID_CONFIRM request processing consisting of 4 | |
2083 | * bullets, labeled as CASE1 - CASE4 below. | |
1da177e4 | 2084 | */ |
b37ad28b | 2085 | __be32 |
b591480b BF |
2086 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
2087 | struct nfsd4_compound_state *cstate, | |
2088 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 2089 | { |
363168b4 | 2090 | struct sockaddr *sa = svc_addr(rqstp); |
21ab45a4 | 2091 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
2092 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
2093 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 2094 | __be32 status; |
1da177e4 LT |
2095 | |
2096 | if (STALE_CLIENTID(clid)) | |
2097 | return nfserr_stale_clientid; | |
2098 | /* | |
2099 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
2100 | * We get here on a DRC miss. | |
2101 | */ | |
2102 | ||
2103 | nfs4_lock_state(); | |
21ab45a4 N |
2104 | |
2105 | conf = find_confirmed_client(clid); | |
2106 | unconf = find_unconfirmed_client(clid); | |
2107 | ||
2108 | status = nfserr_clid_inuse; | |
363168b4 | 2109 | if (conf && !rpc_cmp_addr((struct sockaddr *) &conf->cl_addr, sa)) |
21ab45a4 | 2110 | goto out; |
363168b4 | 2111 | if (unconf && !rpc_cmp_addr((struct sockaddr *) &unconf->cl_addr, sa)) |
21ab45a4 N |
2112 | goto out; |
2113 | ||
a186e767 BF |
2114 | /* |
2115 | * section 14.2.34 of RFC 3530 has a description of | |
2116 | * SETCLIENTID_CONFIRM request processing consisting | |
2117 | * of 4 bullet points, labeled as CASE1 - CASE4 below. | |
2118 | */ | |
366e0c1d | 2119 | if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { |
a186e767 BF |
2120 | /* |
2121 | * RFC 3530 14.2.34 CASE 1: | |
2122 | * callback update | |
2123 | */ | |
599e0a22 | 2124 | if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) |
1da177e4 LT |
2125 | status = nfserr_clid_inuse; |
2126 | else { | |
5a3c9d71 BF |
2127 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
2128 | nfsd4_probe_callback(conf); | |
1a69c179 | 2129 | expire_client(unconf); |
1da177e4 | 2130 | status = nfs_ok; |
1a69c179 | 2131 | |
1da177e4 | 2132 | } |
f3aba4e5 | 2133 | } else if (conf && !unconf) { |
a186e767 BF |
2134 | /* |
2135 | * RFC 3530 14.2.34 CASE 2: | |
2136 | * probable retransmitted request; play it safe and | |
2137 | * do nothing. | |
7c79f737 | 2138 | */ |
599e0a22 | 2139 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) |
1da177e4 | 2140 | status = nfserr_clid_inuse; |
21ab45a4 | 2141 | else |
1da177e4 | 2142 | status = nfs_ok; |
7c79f737 | 2143 | } else if (!conf && unconf |
599e0a22 | 2144 | && same_verf(&unconf->cl_confirm, &confirm)) { |
a186e767 BF |
2145 | /* |
2146 | * RFC 3530 14.2.34 CASE 3: | |
2147 | * Normal case; new or rebooted client: | |
7c79f737 | 2148 | */ |
599e0a22 | 2149 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { |
1da177e4 LT |
2150 | status = nfserr_clid_inuse; |
2151 | } else { | |
1a69c179 N |
2152 | unsigned int hash = |
2153 | clientstr_hashval(unconf->cl_recdir); | |
2154 | conf = find_confirmed_client_by_str(unconf->cl_recdir, | |
e203d506 | 2155 | hash); |
1a69c179 | 2156 | if (conf) { |
c7b9a459 | 2157 | nfsd4_remove_clid_dir(conf); |
1a69c179 N |
2158 | expire_client(conf); |
2159 | } | |
1da177e4 | 2160 | move_to_confirmed(unconf); |
21ab45a4 | 2161 | conf = unconf; |
5a3c9d71 | 2162 | nfsd4_probe_callback(conf); |
1a69c179 | 2163 | status = nfs_ok; |
1da177e4 | 2164 | } |
599e0a22 BF |
2165 | } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) |
2166 | && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, | |
7c79f737 | 2167 | &confirm)))) { |
a186e767 BF |
2168 | /* |
2169 | * RFC 3530 14.2.34 CASE 4: | |
2170 | * Client probably hasn't noticed that we rebooted yet. | |
7c79f737 | 2171 | */ |
1da177e4 | 2172 | status = nfserr_stale_clientid; |
7c79f737 | 2173 | } else { |
08e8987c N |
2174 | /* check that we have hit one of the cases...*/ |
2175 | status = nfserr_clid_inuse; | |
2176 | } | |
1da177e4 | 2177 | out: |
1da177e4 LT |
2178 | nfs4_unlock_state(); |
2179 | return status; | |
2180 | } | |
2181 | ||
1da177e4 LT |
2182 | /* OPEN Share state helper functions */ |
2183 | static inline struct nfs4_file * | |
2184 | alloc_init_file(struct inode *ino) | |
2185 | { | |
2186 | struct nfs4_file *fp; | |
2187 | unsigned int hashval = file_hashval(ino); | |
2188 | ||
e60d4398 N |
2189 | fp = kmem_cache_alloc(file_slab, GFP_KERNEL); |
2190 | if (fp) { | |
8b671b80 | 2191 | atomic_set(&fp->fi_ref, 1); |
1da177e4 | 2192 | INIT_LIST_HEAD(&fp->fi_hash); |
8beefa24 N |
2193 | INIT_LIST_HEAD(&fp->fi_stateids); |
2194 | INIT_LIST_HEAD(&fp->fi_delegations); | |
1da177e4 LT |
2195 | fp->fi_inode = igrab(ino); |
2196 | fp->fi_id = current_fileid++; | |
47f9940c | 2197 | fp->fi_had_conflict = false; |
acfdf5c3 | 2198 | fp->fi_lease = NULL; |
f9d7562f BF |
2199 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); |
2200 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
47cee541 PE |
2201 | spin_lock(&recall_lock); |
2202 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); | |
2203 | spin_unlock(&recall_lock); | |
1da177e4 LT |
2204 | return fp; |
2205 | } | |
2206 | return NULL; | |
2207 | } | |
2208 | ||
e60d4398 | 2209 | static void |
e18b890b | 2210 | nfsd4_free_slab(struct kmem_cache **slab) |
1da177e4 | 2211 | { |
e60d4398 N |
2212 | if (*slab == NULL) |
2213 | return; | |
1a1d92c1 | 2214 | kmem_cache_destroy(*slab); |
e60d4398 | 2215 | *slab = NULL; |
1da177e4 LT |
2216 | } |
2217 | ||
e8ff2a84 | 2218 | void |
1da177e4 LT |
2219 | nfsd4_free_slabs(void) |
2220 | { | |
fe0750e5 BF |
2221 | nfsd4_free_slab(&openowner_slab); |
2222 | nfsd4_free_slab(&lockowner_slab); | |
e60d4398 | 2223 | nfsd4_free_slab(&file_slab); |
5ac049ac | 2224 | nfsd4_free_slab(&stateid_slab); |
5b2d21c1 | 2225 | nfsd4_free_slab(&deleg_slab); |
e60d4398 | 2226 | } |
1da177e4 | 2227 | |
e60d4398 N |
2228 | static int |
2229 | nfsd4_init_slabs(void) | |
2230 | { | |
fe0750e5 BF |
2231 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
2232 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2233 | if (openowner_slab == NULL) | |
2234 | goto out_nomem; | |
2235 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", | |
2236 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2237 | if (lockowner_slab == NULL) | |
e60d4398 N |
2238 | goto out_nomem; |
2239 | file_slab = kmem_cache_create("nfsd4_files", | |
20c2df83 | 2240 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 N |
2241 | if (file_slab == NULL) |
2242 | goto out_nomem; | |
5ac049ac | 2243 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
dcef0413 | 2244 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
5ac049ac N |
2245 | if (stateid_slab == NULL) |
2246 | goto out_nomem; | |
5b2d21c1 | 2247 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 2248 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 N |
2249 | if (deleg_slab == NULL) |
2250 | goto out_nomem; | |
e60d4398 N |
2251 | return 0; |
2252 | out_nomem: | |
2253 | nfsd4_free_slabs(); | |
2254 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | |
2255 | return -ENOMEM; | |
1da177e4 LT |
2256 | } |
2257 | ||
fe0750e5 BF |
2258 | void nfs4_free_openowner(struct nfs4_openowner *oo) |
2259 | { | |
2260 | kfree(oo->oo_owner.so_owner.data); | |
2261 | kmem_cache_free(openowner_slab, oo); | |
2262 | } | |
2263 | ||
2264 | void nfs4_free_lockowner(struct nfs4_lockowner *lo) | |
1da177e4 | 2265 | { |
fe0750e5 BF |
2266 | kfree(lo->lo_owner.so_owner.data); |
2267 | kmem_cache_free(lockowner_slab, lo); | |
1da177e4 LT |
2268 | } |
2269 | ||
ff194bd9 | 2270 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 2271 | { |
ff194bd9 BF |
2272 | rp->rp_status = nfserr_serverfault; |
2273 | rp->rp_buflen = 0; | |
2274 | rp->rp_buf = rp->rp_ibuf; | |
1da177e4 LT |
2275 | } |
2276 | ||
fe0750e5 | 2277 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 2278 | { |
1da177e4 | 2279 | struct nfs4_stateowner *sop; |
1da177e4 | 2280 | |
fe0750e5 | 2281 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
2282 | if (!sop) |
2283 | return NULL; | |
2284 | ||
2285 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); | |
2286 | if (!sop->so_owner.data) { | |
fe0750e5 | 2287 | kmem_cache_free(slab, sop); |
1da177e4 | 2288 | return NULL; |
ff194bd9 BF |
2289 | } |
2290 | sop->so_owner.len = owner->len; | |
2291 | ||
ea1da636 | 2292 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 | 2293 | sop->so_id = current_ownerid++; |
ff194bd9 BF |
2294 | sop->so_client = clp; |
2295 | init_nfs4_replay(&sop->so_replay); | |
2296 | return sop; | |
2297 | } | |
2298 | ||
fe0750e5 | 2299 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 BF |
2300 | { |
2301 | unsigned int idhashval; | |
2302 | ||
fe0750e5 BF |
2303 | idhashval = open_ownerid_hashval(oo->oo_owner.so_id); |
2304 | list_add(&oo->oo_owner.so_idhash, &open_ownerid_hashtbl[idhashval]); | |
2305 | list_add(&oo->oo_owner.so_strhash, &open_ownerstr_hashtbl[strhashval]); | |
2306 | list_add(&oo->oo_perclient, &clp->cl_openowners); | |
ff194bd9 BF |
2307 | } |
2308 | ||
fe0750e5 | 2309 | static struct nfs4_openowner * |
ff194bd9 | 2310 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { |
fe0750e5 | 2311 | struct nfs4_openowner *oo; |
ff194bd9 | 2312 | |
fe0750e5 BF |
2313 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
2314 | if (!oo) | |
ff194bd9 | 2315 | return NULL; |
fe0750e5 BF |
2316 | oo->oo_owner.so_is_open_owner = 1; |
2317 | oo->oo_owner.so_seqid = open->op_seqid; | |
2318 | oo->oo_confirmed = 0; | |
2319 | oo->oo_time = 0; | |
2320 | INIT_LIST_HEAD(&oo->oo_close_lru); | |
2321 | hash_openowner(oo, clp, strhashval); | |
2322 | return oo; | |
1da177e4 LT |
2323 | } |
2324 | ||
1da177e4 | 2325 | static inline void |
dcef0413 | 2326 | init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { |
fe0750e5 | 2327 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 2328 | |
ea1da636 | 2329 | INIT_LIST_HEAD(&stp->st_lockowners); |
fe0750e5 | 2330 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); |
8beefa24 | 2331 | list_add(&stp->st_perfile, &fp->fi_stateids); |
dcef0413 | 2332 | stp->st_stid.sc_type = NFS4_OPEN_STID; |
fe0750e5 | 2333 | stp->st_stateowner = &oo->oo_owner; |
13cd2184 | 2334 | get_nfs4_file(fp); |
1da177e4 | 2335 | stp->st_file = fp; |
dcef0413 BF |
2336 | stp->st_stid.sc_stateid.si_boot = boot_time; |
2337 | stp->st_stid.sc_stateid.si_stateownerid = oo->oo_owner.so_id; | |
2338 | stp->st_stid.sc_stateid.si_fileid = fp->fi_id; | |
73997dc4 | 2339 | /* note will be incremented before first return to client: */ |
dcef0413 | 2340 | stp->st_stid.sc_stateid.si_generation = 0; |
36d44c60 | 2341 | hash_stid(&stp->st_stid); |
1da177e4 LT |
2342 | stp->st_access_bmap = 0; |
2343 | stp->st_deny_bmap = 0; | |
84459a11 AA |
2344 | __set_bit(open->op_share_access & ~NFS4_SHARE_WANT_MASK, |
2345 | &stp->st_access_bmap); | |
1da177e4 | 2346 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
4c4cd222 | 2347 | stp->st_openstp = NULL; |
1da177e4 LT |
2348 | } |
2349 | ||
fd39ca9a | 2350 | static void |
fe0750e5 | 2351 | move_to_close_lru(struct nfs4_openowner *oo) |
1da177e4 | 2352 | { |
fe0750e5 | 2353 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 2354 | |
fe0750e5 BF |
2355 | list_move_tail(&oo->oo_close_lru, &close_lru); |
2356 | oo->oo_time = get_seconds(); | |
1da177e4 LT |
2357 | } |
2358 | ||
1da177e4 | 2359 | static int |
599e0a22 BF |
2360 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
2361 | clientid_t *clid) | |
2362 | { | |
2363 | return (sop->so_owner.len == owner->len) && | |
2364 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
2365 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
2366 | } |
2367 | ||
fe0750e5 | 2368 | static struct nfs4_openowner * |
1da177e4 LT |
2369 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) |
2370 | { | |
2371 | struct nfs4_stateowner *so = NULL; | |
2372 | ||
506f275f | 2373 | list_for_each_entry(so, &open_ownerstr_hashtbl[hashval], so_strhash) { |
599e0a22 | 2374 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) |
fe0750e5 | 2375 | return container_of(so, struct nfs4_openowner, oo_owner); |
1da177e4 LT |
2376 | } |
2377 | return NULL; | |
2378 | } | |
2379 | ||
2380 | /* search file_hashtbl[] for file */ | |
2381 | static struct nfs4_file * | |
2382 | find_file(struct inode *ino) | |
2383 | { | |
2384 | unsigned int hashval = file_hashval(ino); | |
2385 | struct nfs4_file *fp; | |
2386 | ||
8b671b80 | 2387 | spin_lock(&recall_lock); |
1da177e4 | 2388 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
13cd2184 N |
2389 | if (fp->fi_inode == ino) { |
2390 | get_nfs4_file(fp); | |
8b671b80 | 2391 | spin_unlock(&recall_lock); |
1da177e4 | 2392 | return fp; |
13cd2184 | 2393 | } |
1da177e4 | 2394 | } |
8b671b80 | 2395 | spin_unlock(&recall_lock); |
1da177e4 LT |
2396 | return NULL; |
2397 | } | |
2398 | ||
d87a8ade | 2399 | static inline int access_valid(u32 x, u32 minorversion) |
ba5a6a19 | 2400 | { |
d87a8ade | 2401 | if ((x & NFS4_SHARE_ACCESS_MASK) < NFS4_SHARE_ACCESS_READ) |
8838dc43 | 2402 | return 0; |
d87a8ade AA |
2403 | if ((x & NFS4_SHARE_ACCESS_MASK) > NFS4_SHARE_ACCESS_BOTH) |
2404 | return 0; | |
2405 | x &= ~NFS4_SHARE_ACCESS_MASK; | |
2406 | if (minorversion && x) { | |
2407 | if ((x & NFS4_SHARE_WANT_MASK) > NFS4_SHARE_WANT_CANCEL) | |
2408 | return 0; | |
2409 | if ((x & NFS4_SHARE_WHEN_MASK) > NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED) | |
2410 | return 0; | |
2411 | x &= ~(NFS4_SHARE_WANT_MASK | NFS4_SHARE_WHEN_MASK); | |
2412 | } | |
2413 | if (x) | |
8838dc43 BF |
2414 | return 0; |
2415 | return 1; | |
ba5a6a19 BF |
2416 | } |
2417 | ||
8838dc43 | 2418 | static inline int deny_valid(u32 x) |
ba5a6a19 | 2419 | { |
8838dc43 BF |
2420 | /* Note: unlike access bits, deny bits may be zero. */ |
2421 | return x <= NFS4_SHARE_DENY_BOTH; | |
ba5a6a19 | 2422 | } |
1da177e4 | 2423 | |
1da177e4 LT |
2424 | /* |
2425 | * Called to check deny when READ with all zero stateid or | |
2426 | * WRITE with all zero or all one stateid | |
2427 | */ | |
b37ad28b | 2428 | static __be32 |
1da177e4 LT |
2429 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
2430 | { | |
2431 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2432 | struct nfs4_file *fp; | |
dcef0413 | 2433 | struct nfs4_ol_stateid *stp; |
b37ad28b | 2434 | __be32 ret; |
1da177e4 LT |
2435 | |
2436 | dprintk("NFSD: nfs4_share_conflict\n"); | |
2437 | ||
2438 | fp = find_file(ino); | |
13cd2184 N |
2439 | if (!fp) |
2440 | return nfs_ok; | |
b700949b | 2441 | ret = nfserr_locked; |
1da177e4 | 2442 | /* Search for conflicting share reservations */ |
13cd2184 N |
2443 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
2444 | if (test_bit(deny_type, &stp->st_deny_bmap) || | |
2445 | test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) | |
2446 | goto out; | |
1da177e4 | 2447 | } |
13cd2184 N |
2448 | ret = nfs_ok; |
2449 | out: | |
2450 | put_nfs4_file(fp); | |
2451 | return ret; | |
1da177e4 LT |
2452 | } |
2453 | ||
6b57d9c8 | 2454 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
1da177e4 | 2455 | { |
1da177e4 LT |
2456 | /* We're assuming the state code never drops its reference |
2457 | * without first removing the lease. Since we're in this lease | |
2458 | * callback (and since the lease code is serialized by the kernel | |
2459 | * lock) we know the server hasn't removed the lease yet, we know | |
2460 | * it's safe to take a reference: */ | |
2461 | atomic_inc(&dp->dl_count); | |
2462 | ||
1da177e4 | 2463 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); |
1da177e4 | 2464 | |
460781b5 | 2465 | /* only place dl_time is set. protected by lock_flocks*/ |
1da177e4 LT |
2466 | dp->dl_time = get_seconds(); |
2467 | ||
6b57d9c8 BF |
2468 | nfsd4_cb_recall(dp); |
2469 | } | |
2470 | ||
acfdf5c3 | 2471 | /* Called from break_lease() with lock_flocks() held. */ |
6b57d9c8 BF |
2472 | static void nfsd_break_deleg_cb(struct file_lock *fl) |
2473 | { | |
acfdf5c3 BF |
2474 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
2475 | struct nfs4_delegation *dp; | |
6b57d9c8 | 2476 | |
acfdf5c3 BF |
2477 | BUG_ON(!fp); |
2478 | /* We assume break_lease is only called once per lease: */ | |
2479 | BUG_ON(fp->fi_had_conflict); | |
0272e1fd BF |
2480 | /* |
2481 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 2482 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 2483 | * in time: |
0272e1fd BF |
2484 | */ |
2485 | fl->fl_break_time = 0; | |
1da177e4 | 2486 | |
5d926e8c | 2487 | spin_lock(&recall_lock); |
acfdf5c3 BF |
2488 | fp->fi_had_conflict = true; |
2489 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
2490 | nfsd_break_one_deleg(dp); | |
5d926e8c | 2491 | spin_unlock(&recall_lock); |
1da177e4 LT |
2492 | } |
2493 | ||
1da177e4 LT |
2494 | static |
2495 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
2496 | { | |
2497 | if (arg & F_UNLCK) | |
2498 | return lease_modify(onlist, arg); | |
2499 | else | |
2500 | return -EAGAIN; | |
2501 | } | |
2502 | ||
7b021967 | 2503 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
2504 | .lm_break = nfsd_break_deleg_cb, |
2505 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
2506 | }; |
2507 | ||
7a8711c9 BF |
2508 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
2509 | { | |
2510 | if (nfsd4_has_session(cstate)) | |
2511 | return nfs_ok; | |
2512 | if (seqid == so->so_seqid - 1) | |
2513 | return nfserr_replay_me; | |
2514 | if (seqid == so->so_seqid) | |
2515 | return nfs_ok; | |
2516 | return nfserr_bad_seqid; | |
2517 | } | |
1da177e4 | 2518 | |
b37ad28b | 2519 | __be32 |
6668958f AA |
2520 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
2521 | struct nfsd4_open *open) | |
1da177e4 | 2522 | { |
1da177e4 LT |
2523 | clientid_t *clientid = &open->op_clientid; |
2524 | struct nfs4_client *clp = NULL; | |
2525 | unsigned int strhashval; | |
fe0750e5 | 2526 | struct nfs4_openowner *oo = NULL; |
7a8711c9 | 2527 | __be32 status; |
1da177e4 | 2528 | |
1da177e4 | 2529 | if (!check_name(open->op_owner)) |
0f442aa2 | 2530 | return nfserr_inval; |
1da177e4 LT |
2531 | |
2532 | if (STALE_CLIENTID(&open->op_clientid)) | |
2533 | return nfserr_stale_clientid; | |
2534 | ||
506f275f | 2535 | strhashval = open_ownerstr_hashval(clientid->cl_id, &open->op_owner); |
fe0750e5 BF |
2536 | oo = find_openstateowner_str(strhashval, open); |
2537 | open->op_openowner = oo; | |
2538 | if (!oo) { | |
0f442aa2 | 2539 | /* Make sure the client's lease hasn't expired. */ |
1da177e4 LT |
2540 | clp = find_confirmed_client(clientid); |
2541 | if (clp == NULL) | |
0f442aa2 BF |
2542 | return nfserr_expired; |
2543 | goto renew; | |
1da177e4 | 2544 | } |
fe0750e5 | 2545 | if (!oo->oo_confirmed) { |
0f442aa2 | 2546 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
2547 | clp = oo->oo_owner.so_client; |
2548 | release_openowner(oo); | |
2549 | open->op_openowner = NULL; | |
0f442aa2 BF |
2550 | goto renew; |
2551 | } | |
fe0750e5 | 2552 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
7a8711c9 BF |
2553 | if (status) |
2554 | return status; | |
1da177e4 | 2555 | renew: |
fe0750e5 BF |
2556 | if (open->op_openowner == NULL) { |
2557 | oo = alloc_init_open_stateowner(strhashval, clp, open); | |
2558 | if (oo == NULL) | |
3e772463 | 2559 | return nfserr_jukebox; |
fe0750e5 | 2560 | open->op_openowner = oo; |
0f442aa2 | 2561 | } |
fe0750e5 BF |
2562 | list_del_init(&oo->oo_close_lru); |
2563 | renew_client(oo->oo_owner.so_client); | |
0f442aa2 | 2564 | return nfs_ok; |
1da177e4 LT |
2565 | } |
2566 | ||
b37ad28b | 2567 | static inline __be32 |
4a6e43e6 N |
2568 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
2569 | { | |
2570 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
2571 | return nfserr_openmode; | |
2572 | else | |
2573 | return nfs_ok; | |
2574 | } | |
2575 | ||
52f4fb43 N |
2576 | static struct nfs4_delegation * |
2577 | find_delegation_file(struct nfs4_file *fp, stateid_t *stid) | |
2578 | { | |
32b007b4 | 2579 | struct nfs4_delegation *dp; |
52f4fb43 | 2580 | |
acfdf5c3 | 2581 | spin_lock(&recall_lock); |
32b007b4 | 2582 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) |
d5477a8d | 2583 | if (dp->dl_stid.sc_stateid.si_stateownerid == stid->si_stateownerid) { |
32b007b4 BF |
2584 | spin_unlock(&recall_lock); |
2585 | return dp; | |
2586 | } | |
acfdf5c3 | 2587 | spin_unlock(&recall_lock); |
32b007b4 | 2588 | return NULL; |
52f4fb43 N |
2589 | } |
2590 | ||
c47d832b | 2591 | static int share_access_to_flags(u32 share_access) |
24a0111e BF |
2592 | { |
2593 | share_access &= ~NFS4_SHARE_WANT_MASK; | |
2594 | ||
2595 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; | |
2596 | } | |
2597 | ||
b37ad28b | 2598 | static __be32 |
567d9829 N |
2599 | nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, |
2600 | struct nfs4_delegation **dp) | |
2601 | { | |
2602 | int flags; | |
b37ad28b | 2603 | __be32 status = nfserr_bad_stateid; |
567d9829 N |
2604 | |
2605 | *dp = find_delegation_file(fp, &open->op_delegate_stateid); | |
2606 | if (*dp == NULL) | |
c44c5eeb | 2607 | goto out; |
24a0111e | 2608 | flags = share_access_to_flags(open->op_share_access); |
567d9829 N |
2609 | status = nfs4_check_delegmode(*dp, flags); |
2610 | if (status) | |
2611 | *dp = NULL; | |
c44c5eeb N |
2612 | out: |
2613 | if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2614 | return nfs_ok; | |
2615 | if (status) | |
2616 | return status; | |
fe0750e5 | 2617 | open->op_openowner->oo_confirmed = 1; |
c44c5eeb | 2618 | return nfs_ok; |
567d9829 N |
2619 | } |
2620 | ||
b37ad28b | 2621 | static __be32 |
dcef0413 | 2622 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp) |
1da177e4 | 2623 | { |
dcef0413 | 2624 | struct nfs4_ol_stateid *local; |
fe0750e5 | 2625 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 2626 | |
8beefa24 | 2627 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
2628 | /* ignore lock owners */ |
2629 | if (local->st_stateowner->so_is_open_owner == 0) | |
2630 | continue; | |
2631 | /* remember if we have seen this open owner */ | |
fe0750e5 | 2632 | if (local->st_stateowner == &oo->oo_owner) |
1da177e4 LT |
2633 | *stpp = local; |
2634 | /* check for conflicting share reservations */ | |
2635 | if (!test_share(local, open)) | |
77eaae8d | 2636 | return nfserr_share_denied; |
1da177e4 | 2637 | } |
77eaae8d | 2638 | return nfs_ok; |
1da177e4 LT |
2639 | } |
2640 | ||
dcef0413 | 2641 | static inline struct nfs4_ol_stateid * |
5ac049ac N |
2642 | nfs4_alloc_stateid(void) |
2643 | { | |
2644 | return kmem_cache_alloc(stateid_slab, GFP_KERNEL); | |
2645 | } | |
2646 | ||
21fb4016 BF |
2647 | static inline int nfs4_access_to_access(u32 nfs4_access) |
2648 | { | |
2649 | int flags = 0; | |
2650 | ||
2651 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
2652 | flags |= NFSD_MAY_READ; | |
2653 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
2654 | flags |= NFSD_MAY_WRITE; | |
2655 | return flags; | |
2656 | } | |
2657 | ||
0c12eaff CB |
2658 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
2659 | struct svc_fh *cur_fh, struct nfsd4_open *open) | |
f9d7562f BF |
2660 | { |
2661 | __be32 status; | |
0c12eaff CB |
2662 | int oflag = nfs4_access_to_omode(open->op_share_access); |
2663 | int access = nfs4_access_to_access(open->op_share_access); | |
2664 | ||
2665 | /* CLAIM_DELEGATE_CUR is used in response to a broken lease; | |
2666 | * allowing it to break the lease and return EAGAIN leaves the | |
2667 | * client unable to make progress in returning the delegation */ | |
2668 | if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2669 | access |= NFSD_MAY_NOT_BREAK_LEASE; | |
f9d7562f BF |
2670 | |
2671 | if (!fp->fi_fds[oflag]) { | |
2672 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, | |
2673 | &fp->fi_fds[oflag]); | |
f9d7562f BF |
2674 | if (status) |
2675 | return status; | |
2676 | } | |
2677 | nfs4_file_get_access(fp, oflag); | |
2678 | ||
2679 | return nfs_ok; | |
2680 | } | |
2681 | ||
b37ad28b | 2682 | static __be32 |
dcef0413 | 2683 | nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_ol_stateid **stpp, |
f9d7562f BF |
2684 | struct nfs4_file *fp, struct svc_fh *cur_fh, |
2685 | struct nfsd4_open *open) | |
1da177e4 | 2686 | { |
dcef0413 | 2687 | struct nfs4_ol_stateid *stp; |
f9d7562f | 2688 | __be32 status; |
1da177e4 | 2689 | |
5ac049ac | 2690 | stp = nfs4_alloc_stateid(); |
1da177e4 | 2691 | if (stp == NULL) |
3e772463 | 2692 | return nfserr_jukebox; |
1da177e4 | 2693 | |
0c12eaff | 2694 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); |
f9d7562f BF |
2695 | if (status) { |
2696 | kmem_cache_free(stateid_slab, stp); | |
2697 | return status; | |
1da177e4 | 2698 | } |
1da177e4 LT |
2699 | *stpp = stp; |
2700 | return 0; | |
2701 | } | |
2702 | ||
b37ad28b | 2703 | static inline __be32 |
1da177e4 LT |
2704 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
2705 | struct nfsd4_open *open) | |
2706 | { | |
2707 | struct iattr iattr = { | |
2708 | .ia_valid = ATTR_SIZE, | |
2709 | .ia_size = 0, | |
2710 | }; | |
2711 | if (!open->op_truncate) | |
2712 | return 0; | |
2713 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 2714 | return nfserr_inval; |
1da177e4 LT |
2715 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
2716 | } | |
2717 | ||
b37ad28b | 2718 | static __be32 |
dcef0413 | 2719 | nfs4_upgrade_open(struct svc_rqst *rqstp, struct nfs4_file *fp, struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp, struct nfsd4_open *open) |
1da177e4 | 2720 | { |
7d947842 BF |
2721 | u32 op_share_access = open->op_share_access & ~NFS4_SHARE_WANT_MASK; |
2722 | bool new_access; | |
b37ad28b | 2723 | __be32 status; |
1da177e4 | 2724 | |
7d947842 | 2725 | new_access = !test_bit(op_share_access, &stp->st_access_bmap); |
f9d7562f | 2726 | if (new_access) { |
0c12eaff | 2727 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); |
f9d7562f BF |
2728 | if (status) |
2729 | return status; | |
6c26d08f | 2730 | } |
1da177e4 LT |
2731 | status = nfsd4_truncate(rqstp, cur_fh, open); |
2732 | if (status) { | |
f9d7562f | 2733 | if (new_access) { |
f197c271 | 2734 | int oflag = nfs4_access_to_omode(op_share_access); |
f9d7562f BF |
2735 | nfs4_file_put_access(fp, oflag); |
2736 | } | |
1da177e4 LT |
2737 | return status; |
2738 | } | |
2739 | /* remember the open */ | |
24a0111e | 2740 | __set_bit(op_share_access, &stp->st_access_bmap); |
b55e0ba1 | 2741 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
1da177e4 LT |
2742 | |
2743 | return nfs_ok; | |
2744 | } | |
2745 | ||
2746 | ||
1da177e4 | 2747 | static void |
37515177 | 2748 | nfs4_set_claim_prev(struct nfsd4_open *open) |
1da177e4 | 2749 | { |
fe0750e5 BF |
2750 | open->op_openowner->oo_confirmed = 1; |
2751 | open->op_openowner->oo_owner.so_client->cl_firststate = 1; | |
1da177e4 LT |
2752 | } |
2753 | ||
14a24e99 BF |
2754 | /* Should we give out recallable state?: */ |
2755 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
2756 | { | |
2757 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
2758 | return true; | |
2759 | /* | |
2760 | * In the sessions case, since we don't have to establish a | |
2761 | * separate connection for callbacks, we assume it's OK | |
2762 | * until we hear otherwise: | |
2763 | */ | |
2764 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
2765 | } | |
2766 | ||
22d38c4c BF |
2767 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) |
2768 | { | |
2769 | struct file_lock *fl; | |
2770 | ||
2771 | fl = locks_alloc_lock(); | |
2772 | if (!fl) | |
2773 | return NULL; | |
2774 | locks_init_lock(fl); | |
2775 | fl->fl_lmops = &nfsd_lease_mng_ops; | |
2776 | fl->fl_flags = FL_LEASE; | |
2777 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; | |
2778 | fl->fl_end = OFFSET_MAX; | |
acfdf5c3 | 2779 | fl->fl_owner = (fl_owner_t)(dp->dl_file); |
22d38c4c | 2780 | fl->fl_pid = current->tgid; |
22d38c4c BF |
2781 | return fl; |
2782 | } | |
2783 | ||
edab9782 BF |
2784 | static int nfs4_setlease(struct nfs4_delegation *dp, int flag) |
2785 | { | |
acfdf5c3 | 2786 | struct nfs4_file *fp = dp->dl_file; |
edab9782 BF |
2787 | struct file_lock *fl; |
2788 | int status; | |
2789 | ||
2790 | fl = nfs4_alloc_init_lease(dp, flag); | |
2791 | if (!fl) | |
2792 | return -ENOMEM; | |
acfdf5c3 BF |
2793 | fl->fl_file = find_readable_file(fp); |
2794 | list_add(&dp->dl_perclnt, &dp->dl_client->cl_delegations); | |
2795 | status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); | |
edab9782 | 2796 | if (status) { |
acfdf5c3 | 2797 | list_del_init(&dp->dl_perclnt); |
edab9782 BF |
2798 | locks_free_lock(fl); |
2799 | return -ENOMEM; | |
2800 | } | |
acfdf5c3 BF |
2801 | fp->fi_lease = fl; |
2802 | fp->fi_deleg_file = fl->fl_file; | |
2803 | get_file(fp->fi_deleg_file); | |
2804 | atomic_set(&fp->fi_delegees, 1); | |
2805 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2806 | return 0; | |
2807 | } | |
2808 | ||
2809 | static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag) | |
2810 | { | |
2811 | struct nfs4_file *fp = dp->dl_file; | |
2812 | ||
2813 | if (!fp->fi_lease) | |
2814 | return nfs4_setlease(dp, flag); | |
2815 | spin_lock(&recall_lock); | |
2816 | if (fp->fi_had_conflict) { | |
2817 | spin_unlock(&recall_lock); | |
2818 | return -EAGAIN; | |
2819 | } | |
2820 | atomic_inc(&fp->fi_delegees); | |
2821 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2822 | spin_unlock(&recall_lock); | |
2823 | list_add(&dp->dl_perclnt, &dp->dl_client->cl_delegations); | |
edab9782 BF |
2824 | return 0; |
2825 | } | |
2826 | ||
1da177e4 LT |
2827 | /* |
2828 | * Attempt to hand out a delegation. | |
2829 | */ | |
2830 | static void | |
dcef0413 | 2831 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_ol_stateid *stp) |
1da177e4 LT |
2832 | { |
2833 | struct nfs4_delegation *dp; | |
fe0750e5 | 2834 | struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner); |
14a24e99 | 2835 | int cb_up; |
1da177e4 LT |
2836 | int status, flag = 0; |
2837 | ||
fe0750e5 | 2838 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
1da177e4 | 2839 | flag = NFS4_OPEN_DELEGATE_NONE; |
7b190fec N |
2840 | open->op_recall = 0; |
2841 | switch (open->op_claim_type) { | |
2842 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 2843 | if (!cb_up) |
7b190fec N |
2844 | open->op_recall = 1; |
2845 | flag = open->op_delegate_type; | |
2846 | if (flag == NFS4_OPEN_DELEGATE_NONE) | |
2847 | goto out; | |
2848 | break; | |
2849 | case NFS4_OPEN_CLAIM_NULL: | |
2850 | /* Let's not give out any delegations till everyone's | |
2851 | * had the chance to reclaim theirs.... */ | |
af558e33 | 2852 | if (locks_in_grace()) |
7b190fec | 2853 | goto out; |
fe0750e5 | 2854 | if (!cb_up || !oo->oo_confirmed) |
7b190fec N |
2855 | goto out; |
2856 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | |
2857 | flag = NFS4_OPEN_DELEGATE_WRITE; | |
2858 | else | |
2859 | flag = NFS4_OPEN_DELEGATE_READ; | |
2860 | break; | |
2861 | default: | |
2862 | goto out; | |
2863 | } | |
1da177e4 | 2864 | |
fe0750e5 | 2865 | dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh, flag); |
dd239cc0 BF |
2866 | if (dp == NULL) |
2867 | goto out_no_deleg; | |
acfdf5c3 | 2868 | status = nfs4_set_delegation(dp, flag); |
edab9782 | 2869 | if (status) |
dd239cc0 | 2870 | goto out_free; |
1da177e4 | 2871 | |
d5477a8d | 2872 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 2873 | |
8c10cbdb | 2874 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
d5477a8d | 2875 | STATEID_VAL(&dp->dl_stid.sc_stateid)); |
1da177e4 | 2876 | out: |
7b190fec N |
2877 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS |
2878 | && flag == NFS4_OPEN_DELEGATE_NONE | |
2879 | && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) | |
2fdada03 | 2880 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
1da177e4 | 2881 | open->op_delegate_type = flag; |
dd239cc0 BF |
2882 | return; |
2883 | out_free: | |
acfdf5c3 | 2884 | nfs4_put_delegation(dp); |
dd239cc0 BF |
2885 | out_no_deleg: |
2886 | flag = NFS4_OPEN_DELEGATE_NONE; | |
2887 | goto out; | |
1da177e4 LT |
2888 | } |
2889 | ||
2890 | /* | |
2891 | * called with nfs4_lock_state() held. | |
2892 | */ | |
b37ad28b | 2893 | __be32 |
1da177e4 LT |
2894 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
2895 | { | |
6668958f | 2896 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
1da177e4 LT |
2897 | struct nfs4_file *fp = NULL; |
2898 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
dcef0413 | 2899 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 2900 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 2901 | __be32 status; |
1da177e4 LT |
2902 | |
2903 | status = nfserr_inval; | |
d87a8ade | 2904 | if (!access_valid(open->op_share_access, resp->cstate.minorversion) |
ba5a6a19 | 2905 | || !deny_valid(open->op_share_deny)) |
1da177e4 LT |
2906 | goto out; |
2907 | /* | |
2908 | * Lookup file; if found, lookup stateid and check open request, | |
2909 | * and check for delegations in the process of being recalled. | |
2910 | * If not found, create the nfs4_file struct | |
2911 | */ | |
2912 | fp = find_file(ino); | |
2913 | if (fp) { | |
2914 | if ((status = nfs4_check_open(fp, open, &stp))) | |
2915 | goto out; | |
c44c5eeb N |
2916 | status = nfs4_check_deleg(fp, open, &dp); |
2917 | if (status) | |
2918 | goto out; | |
1da177e4 | 2919 | } else { |
c44c5eeb N |
2920 | status = nfserr_bad_stateid; |
2921 | if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2922 | goto out; | |
3e772463 | 2923 | status = nfserr_jukebox; |
1da177e4 LT |
2924 | fp = alloc_init_file(ino); |
2925 | if (fp == NULL) | |
2926 | goto out; | |
2927 | } | |
2928 | ||
2929 | /* | |
2930 | * OPEN the file, or upgrade an existing OPEN. | |
2931 | * If truncate fails, the OPEN fails. | |
2932 | */ | |
2933 | if (stp) { | |
2934 | /* Stateid was found, this is an OPEN upgrade */ | |
f9d7562f | 2935 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
1da177e4 LT |
2936 | if (status) |
2937 | goto out; | |
2938 | } else { | |
f9d7562f | 2939 | status = nfs4_new_open(rqstp, &stp, fp, current_fh, open); |
567d9829 | 2940 | if (status) |
1da177e4 | 2941 | goto out; |
881ea2b1 | 2942 | init_open_stateid(stp, fp, open); |
1da177e4 LT |
2943 | status = nfsd4_truncate(rqstp, current_fh, open); |
2944 | if (status) { | |
2283963f | 2945 | release_open_stateid(stp); |
1da177e4 LT |
2946 | goto out; |
2947 | } | |
2948 | } | |
dcef0413 BF |
2949 | update_stateid(&stp->st_stid.sc_stateid); |
2950 | memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 2951 | |
4dc6ec00 | 2952 | if (nfsd4_has_session(&resp->cstate)) |
fe0750e5 | 2953 | open->op_openowner->oo_confirmed = 1; |
6668958f | 2954 | |
1da177e4 LT |
2955 | /* |
2956 | * Attempt to hand out a delegation. No error return, because the | |
2957 | * OPEN succeeds even if we fail. | |
2958 | */ | |
2959 | nfs4_open_delegation(current_fh, open, stp); | |
2960 | ||
2961 | status = nfs_ok; | |
2962 | ||
8c10cbdb | 2963 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
dcef0413 | 2964 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
1da177e4 | 2965 | out: |
13cd2184 N |
2966 | if (fp) |
2967 | put_nfs4_file(fp); | |
37515177 N |
2968 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
2969 | nfs4_set_claim_prev(open); | |
1da177e4 LT |
2970 | /* |
2971 | * To finish the open response, we just need to set the rflags. | |
2972 | */ | |
2973 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
fe0750e5 | 2974 | if (!open->op_openowner->oo_confirmed && |
6668958f | 2975 | !nfsd4_has_session(&resp->cstate)) |
1da177e4 LT |
2976 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
2977 | ||
2978 | return status; | |
2979 | } | |
2980 | ||
b37ad28b | 2981 | __be32 |
b591480b BF |
2982 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2983 | clientid_t *clid) | |
1da177e4 LT |
2984 | { |
2985 | struct nfs4_client *clp; | |
b37ad28b | 2986 | __be32 status; |
1da177e4 LT |
2987 | |
2988 | nfs4_lock_state(); | |
2989 | dprintk("process_renew(%08x/%08x): starting\n", | |
2990 | clid->cl_boot, clid->cl_id); | |
2991 | status = nfserr_stale_clientid; | |
2992 | if (STALE_CLIENTID(clid)) | |
2993 | goto out; | |
2994 | clp = find_confirmed_client(clid); | |
2995 | status = nfserr_expired; | |
2996 | if (clp == NULL) { | |
2997 | /* We assume the client took too long to RENEW. */ | |
2998 | dprintk("nfsd4_renew: clientid not found!\n"); | |
2999 | goto out; | |
3000 | } | |
3001 | renew_client(clp); | |
3002 | status = nfserr_cb_path_down; | |
ea1da636 | 3003 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 3004 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
3005 | goto out; |
3006 | status = nfs_ok; | |
3007 | out: | |
3008 | nfs4_unlock_state(); | |
3009 | return status; | |
3010 | } | |
3011 | ||
c47d832b | 3012 | static struct lock_manager nfsd4_manager = { |
af558e33 BF |
3013 | }; |
3014 | ||
a76b4319 | 3015 | static void |
af558e33 | 3016 | nfsd4_end_grace(void) |
a76b4319 N |
3017 | { |
3018 | dprintk("NFSD: end of grace period\n"); | |
c7b9a459 | 3019 | nfsd4_recdir_purge_old(); |
af558e33 | 3020 | locks_end_grace(&nfsd4_manager); |
e46b498c BF |
3021 | /* |
3022 | * Now that every NFSv4 client has had the chance to recover and | |
3023 | * to see the (possibly new, possibly shorter) lease time, we | |
3024 | * can safely set the next grace time to the current lease time: | |
3025 | */ | |
3026 | nfsd4_grace = nfsd4_lease; | |
a76b4319 N |
3027 | } |
3028 | ||
fd39ca9a | 3029 | static time_t |
1da177e4 LT |
3030 | nfs4_laundromat(void) |
3031 | { | |
3032 | struct nfs4_client *clp; | |
fe0750e5 | 3033 | struct nfs4_openowner *oo; |
1da177e4 LT |
3034 | struct nfs4_delegation *dp; |
3035 | struct list_head *pos, *next, reaplist; | |
cf07d2ea BF |
3036 | time_t cutoff = get_seconds() - nfsd4_lease; |
3037 | time_t t, clientid_val = nfsd4_lease; | |
3038 | time_t u, test_val = nfsd4_lease; | |
1da177e4 LT |
3039 | |
3040 | nfs4_lock_state(); | |
3041 | ||
3042 | dprintk("NFSD: laundromat service - starting\n"); | |
af558e33 BF |
3043 | if (locks_in_grace()) |
3044 | nfsd4_end_grace(); | |
36acb66b BH |
3045 | INIT_LIST_HEAD(&reaplist); |
3046 | spin_lock(&client_lock); | |
1da177e4 LT |
3047 | list_for_each_safe(pos, next, &client_lru) { |
3048 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
3049 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
3050 | t = clp->cl_time - cutoff; | |
3051 | if (clientid_val > t) | |
3052 | clientid_val = t; | |
3053 | break; | |
3054 | } | |
d7682988 BH |
3055 | if (atomic_read(&clp->cl_refcount)) { |
3056 | dprintk("NFSD: client in use (clientid %08x)\n", | |
3057 | clp->cl_clientid.cl_id); | |
3058 | continue; | |
3059 | } | |
3060 | unhash_client_locked(clp); | |
3061 | list_add(&clp->cl_lru, &reaplist); | |
36acb66b BH |
3062 | } |
3063 | spin_unlock(&client_lock); | |
3064 | list_for_each_safe(pos, next, &reaplist) { | |
3065 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
3066 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
3067 | clp->cl_clientid.cl_id); | |
c7b9a459 | 3068 | nfsd4_remove_clid_dir(clp); |
1da177e4 LT |
3069 | expire_client(clp); |
3070 | } | |
1da177e4 LT |
3071 | spin_lock(&recall_lock); |
3072 | list_for_each_safe(pos, next, &del_recall_lru) { | |
3073 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3074 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
3075 | u = dp->dl_time - cutoff; | |
3076 | if (test_val > u) | |
3077 | test_val = u; | |
3078 | break; | |
3079 | } | |
1da177e4 LT |
3080 | list_move(&dp->dl_recall_lru, &reaplist); |
3081 | } | |
3082 | spin_unlock(&recall_lock); | |
3083 | list_for_each_safe(pos, next, &reaplist) { | |
3084 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3085 | list_del_init(&dp->dl_recall_lru); | |
3086 | unhash_delegation(dp); | |
3087 | } | |
cf07d2ea | 3088 | test_val = nfsd4_lease; |
1da177e4 | 3089 | list_for_each_safe(pos, next, &close_lru) { |
fe0750e5 BF |
3090 | oo = container_of(pos, struct nfs4_openowner, oo_close_lru); |
3091 | if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { | |
3092 | u = oo->oo_time - cutoff; | |
1da177e4 LT |
3093 | if (test_val > u) |
3094 | test_val = u; | |
3095 | break; | |
3096 | } | |
3097 | dprintk("NFSD: purging unused open stateowner (so_id %d)\n", | |
fe0750e5 BF |
3098 | oo->oo_owner.so_id); |
3099 | release_openowner(oo); | |
1da177e4 LT |
3100 | } |
3101 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
3102 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
3103 | nfs4_unlock_state(); | |
3104 | return clientid_val; | |
3105 | } | |
3106 | ||
a254b246 HH |
3107 | static struct workqueue_struct *laundry_wq; |
3108 | static void laundromat_main(struct work_struct *); | |
3109 | static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); | |
3110 | ||
3111 | static void | |
c4028958 | 3112 | laundromat_main(struct work_struct *not_used) |
1da177e4 LT |
3113 | { |
3114 | time_t t; | |
3115 | ||
3116 | t = nfs4_laundromat(); | |
3117 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); | |
58da282b | 3118 | queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); |
1da177e4 LT |
3119 | } |
3120 | ||
fe0750e5 | 3121 | static struct nfs4_openowner * search_close_lru(u32 st_id) |
f8816512 | 3122 | { |
fe0750e5 | 3123 | struct nfs4_openowner *local; |
1da177e4 | 3124 | |
fe0750e5 BF |
3125 | list_for_each_entry(local, &close_lru, oo_close_lru) { |
3126 | if (local->oo_owner.so_id == st_id) | |
f4dee24c | 3127 | return local; |
1da177e4 LT |
3128 | } |
3129 | return NULL; | |
3130 | } | |
3131 | ||
3132 | static inline int | |
dcef0413 | 3133 | nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) |
1da177e4 | 3134 | { |
f9d7562f | 3135 | return fhp->fh_dentry->d_inode != stp->st_file->fi_inode; |
1da177e4 LT |
3136 | } |
3137 | ||
3138 | static int | |
3139 | STALE_STATEID(stateid_t *stateid) | |
3140 | { | |
e4e83ea4 BF |
3141 | if (stateid->si_boot == boot_time) |
3142 | return 0; | |
3143 | dprintk("NFSD: stale stateid " STATEID_FMT "!\n", | |
8c10cbdb | 3144 | STATEID_VAL(stateid)); |
e4e83ea4 | 3145 | return 1; |
1da177e4 LT |
3146 | } |
3147 | ||
3148 | static inline int | |
3149 | access_permit_read(unsigned long access_bmap) | |
3150 | { | |
3151 | return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || | |
3152 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || | |
3153 | test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); | |
3154 | } | |
3155 | ||
3156 | static inline int | |
3157 | access_permit_write(unsigned long access_bmap) | |
3158 | { | |
3159 | return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || | |
3160 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); | |
3161 | } | |
3162 | ||
3163 | static | |
dcef0413 | 3164 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
1da177e4 | 3165 | { |
b37ad28b | 3166 | __be32 status = nfserr_openmode; |
1da177e4 | 3167 | |
02921914 BF |
3168 | /* For lock stateid's, we test the parent open, not the lock: */ |
3169 | if (stp->st_openstp) | |
3170 | stp = stp->st_openstp; | |
1da177e4 LT |
3171 | if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) |
3172 | goto out; | |
3173 | if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) | |
3174 | goto out; | |
3175 | status = nfs_ok; | |
3176 | out: | |
3177 | return status; | |
3178 | } | |
3179 | ||
b37ad28b | 3180 | static inline __be32 |
1da177e4 LT |
3181 | check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) |
3182 | { | |
203a8c8e | 3183 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 3184 | return nfs_ok; |
af558e33 | 3185 | else if (locks_in_grace()) { |
25985edc | 3186 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
3187 | * conflicting state; so we must wait out the grace period. */ |
3188 | return nfserr_grace; | |
3189 | } else if (flags & WR_STATE) | |
3190 | return nfs4_share_conflict(current_fh, | |
3191 | NFS4_SHARE_DENY_WRITE); | |
3192 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
3193 | return nfs4_share_conflict(current_fh, | |
3194 | NFS4_SHARE_DENY_READ); | |
3195 | } | |
3196 | ||
3197 | /* | |
3198 | * Allow READ/WRITE during grace period on recovered state only for files | |
3199 | * that are not able to provide mandatory locking. | |
3200 | */ | |
3201 | static inline int | |
18f82731 | 3202 | grace_disallows_io(struct inode *inode) |
1da177e4 | 3203 | { |
203a8c8e | 3204 | return locks_in_grace() && mandatory_lock(inode); |
1da177e4 LT |
3205 | } |
3206 | ||
81b82965 BF |
3207 | /* Returns true iff a is later than b: */ |
3208 | static bool stateid_generation_after(stateid_t *a, stateid_t *b) | |
3209 | { | |
3210 | return (s32)a->si_generation - (s32)b->si_generation > 0; | |
3211 | } | |
3212 | ||
28dde241 | 3213 | static int check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 3214 | { |
6668958f AA |
3215 | /* |
3216 | * When sessions are used the stateid generation number is ignored | |
3217 | * when it is zero. | |
3218 | */ | |
28dde241 | 3219 | if (has_session && in->si_generation == 0) |
81b82965 BF |
3220 | return nfs_ok; |
3221 | ||
3222 | if (in->si_generation == ref->si_generation) | |
3223 | return nfs_ok; | |
6668958f | 3224 | |
0836f587 | 3225 | /* If the client sends us a stateid from the future, it's buggy: */ |
81b82965 | 3226 | if (stateid_generation_after(in, ref)) |
0836f587 BF |
3227 | return nfserr_bad_stateid; |
3228 | /* | |
81b82965 BF |
3229 | * However, we could see a stateid from the past, even from a |
3230 | * non-buggy client. For example, if the client sends a lock | |
3231 | * while some IO is outstanding, the lock may bump si_generation | |
3232 | * while the IO is still in flight. The client could avoid that | |
3233 | * situation by waiting for responses on all the IO requests, | |
3234 | * but better performance may result in retrying IO that | |
3235 | * receives an old_stateid error if requests are rarely | |
3236 | * reordered in flight: | |
0836f587 | 3237 | */ |
81b82965 | 3238 | return nfserr_old_stateid; |
0836f587 BF |
3239 | } |
3240 | ||
3e633079 BF |
3241 | static int is_delegation_stateid(stateid_t *stateid) |
3242 | { | |
3243 | return stateid->si_fileid == 0; | |
3244 | } | |
3245 | ||
28dde241 | 3246 | __be32 nfs4_validate_stateid(stateid_t *stateid, bool has_session) |
17456804 | 3247 | { |
dcef0413 | 3248 | struct nfs4_ol_stateid *stp = NULL; |
17456804 BS |
3249 | __be32 status = nfserr_stale_stateid; |
3250 | ||
3251 | if (STALE_STATEID(stateid)) | |
3252 | goto out; | |
3253 | ||
3254 | status = nfserr_expired; | |
4d71ab87 | 3255 | stp = find_stateid(stateid); |
17456804 BS |
3256 | if (!stp) |
3257 | goto out; | |
3258 | status = nfserr_bad_stateid; | |
fe0750e5 BF |
3259 | if (stp->st_stateowner->so_is_open_owner |
3260 | && !openowner(stp->st_stateowner)->oo_confirmed) | |
17456804 BS |
3261 | goto out; |
3262 | ||
dcef0413 | 3263 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, has_session); |
17456804 BS |
3264 | if (status) |
3265 | goto out; | |
3266 | ||
3267 | status = nfs_ok; | |
3268 | out: | |
3269 | return status; | |
3270 | } | |
3271 | ||
1da177e4 LT |
3272 | /* |
3273 | * Checks for stateid operations | |
3274 | */ | |
b37ad28b | 3275 | __be32 |
dd453dfd BH |
3276 | nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, |
3277 | stateid_t *stateid, int flags, struct file **filpp) | |
1da177e4 | 3278 | { |
dcef0413 | 3279 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 3280 | struct nfs4_delegation *dp = NULL; |
dd453dfd | 3281 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 3282 | struct inode *ino = current_fh->fh_dentry->d_inode; |
b37ad28b | 3283 | __be32 status; |
1da177e4 | 3284 | |
1da177e4 LT |
3285 | if (filpp) |
3286 | *filpp = NULL; | |
3287 | ||
18f82731 | 3288 | if (grace_disallows_io(ino)) |
1da177e4 LT |
3289 | return nfserr_grace; |
3290 | ||
3291 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3292 | return check_special_stateids(current_fh, stateid, flags); | |
3293 | ||
1da177e4 LT |
3294 | status = nfserr_stale_stateid; |
3295 | if (STALE_STATEID(stateid)) | |
3296 | goto out; | |
3297 | ||
33515142 BF |
3298 | /* |
3299 | * We assume that any stateid that has the current boot time, | |
3300 | * but that we can't find, is expired: | |
3301 | */ | |
3302 | status = nfserr_expired; | |
3e633079 | 3303 | if (is_delegation_stateid(stateid)) { |
a4455be0 | 3304 | dp = find_delegation_stateid(ino, stateid); |
e4e83ea4 | 3305 | if (!dp) |
1da177e4 | 3306 | goto out; |
d5477a8d | 3307 | status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); |
0c2a498f BF |
3308 | if (status) |
3309 | goto out; | |
dc9bf700 BF |
3310 | status = nfs4_check_delegmode(dp, flags); |
3311 | if (status) | |
3312 | goto out; | |
3313 | renew_client(dp->dl_client); | |
43b0178e | 3314 | if (filpp) { |
acfdf5c3 | 3315 | *filpp = dp->dl_file->fi_deleg_file; |
43b0178e DC |
3316 | BUG_ON(!*filpp); |
3317 | } | |
1da177e4 | 3318 | } else { /* open or lock stateid */ |
4d71ab87 | 3319 | stp = find_stateid(stateid); |
e4e83ea4 | 3320 | if (!stp) |
1da177e4 | 3321 | goto out; |
33515142 | 3322 | status = nfserr_bad_stateid; |
6150ef0d | 3323 | if (nfs4_check_fh(current_fh, stp)) |
1da177e4 | 3324 | goto out; |
fe0750e5 BF |
3325 | if (stp->st_stateowner->so_is_open_owner |
3326 | && !openowner(stp->st_stateowner)->oo_confirmed) | |
1da177e4 | 3327 | goto out; |
dcef0413 | 3328 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, |
28dde241 | 3329 | nfsd4_has_session(cstate)); |
0c2a498f BF |
3330 | if (status) |
3331 | goto out; | |
a4455be0 BF |
3332 | status = nfs4_check_openmode(stp, flags); |
3333 | if (status) | |
1da177e4 LT |
3334 | goto out; |
3335 | renew_client(stp->st_stateowner->so_client); | |
f9d7562f BF |
3336 | if (filpp) { |
3337 | if (flags & RD_STATE) | |
3338 | *filpp = find_readable_file(stp->st_file); | |
3339 | else | |
3340 | *filpp = find_writeable_file(stp->st_file); | |
f9d7562f | 3341 | } |
1da177e4 LT |
3342 | } |
3343 | status = nfs_ok; | |
3344 | out: | |
3345 | return status; | |
3346 | } | |
3347 | ||
e1ca12df BS |
3348 | static __be32 |
3349 | nfsd4_free_delegation_stateid(stateid_t *stateid) | |
3350 | { | |
3351 | struct nfs4_delegation *dp = search_for_delegation(stateid); | |
3352 | if (dp) | |
3353 | return nfserr_locks_held; | |
3354 | return nfserr_bad_stateid; | |
3355 | } | |
3356 | ||
3357 | static __be32 | |
dcef0413 | 3358 | nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) |
e1ca12df | 3359 | { |
fe0750e5 | 3360 | if (check_for_locks(stp->st_file, lockowner(stp->st_stateowner))) |
e1ca12df BS |
3361 | return nfserr_locks_held; |
3362 | release_lock_stateid(stp); | |
3363 | return nfs_ok; | |
3364 | } | |
3365 | ||
17456804 BS |
3366 | /* |
3367 | * Test if the stateid is valid | |
3368 | */ | |
3369 | __be32 | |
3370 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3371 | struct nfsd4_test_stateid *test_stateid) | |
3372 | { | |
3373 | test_stateid->ts_has_session = nfsd4_has_session(cstate); | |
3374 | return nfs_ok; | |
3375 | } | |
3376 | ||
e1ca12df BS |
3377 | /* |
3378 | * Free a state id | |
3379 | */ | |
3380 | __be32 | |
3381 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3382 | struct nfsd4_free_stateid *free_stateid) | |
3383 | { | |
3384 | stateid_t *stateid = &free_stateid->fr_stateid; | |
dcef0413 | 3385 | struct nfs4_ol_stateid *stp; |
e1ca12df BS |
3386 | __be32 ret; |
3387 | ||
3388 | nfs4_lock_state(); | |
3389 | if (is_delegation_stateid(stateid)) { | |
3390 | ret = nfsd4_free_delegation_stateid(stateid); | |
3391 | goto out; | |
3392 | } | |
3393 | ||
4d71ab87 | 3394 | stp = find_stateid(stateid); |
e1ca12df BS |
3395 | if (!stp) { |
3396 | ret = nfserr_bad_stateid; | |
3397 | goto out; | |
3398 | } | |
dcef0413 | 3399 | ret = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, 1); |
81b82965 BF |
3400 | if (ret) |
3401 | goto out; | |
e1ca12df | 3402 | |
dcef0413 | 3403 | if (stp->st_stid.sc_type == NFS4_OPEN_STID) { |
e1ca12df BS |
3404 | ret = nfserr_locks_held; |
3405 | goto out; | |
3406 | } else { | |
3407 | ret = nfsd4_free_lock_stateid(stp); | |
3408 | goto out; | |
3409 | } | |
3410 | ||
3411 | out: | |
3412 | nfs4_unlock_state(); | |
3413 | return ret; | |
3414 | } | |
3415 | ||
4c4cd222 N |
3416 | static inline int |
3417 | setlkflg (int type) | |
3418 | { | |
3419 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
3420 | RD_STATE : WR_STATE; | |
3421 | } | |
1da177e4 | 3422 | |
c0a5d93e BF |
3423 | static __be32 nfs4_nospecial_stateid_checks(stateid_t *stateid) |
3424 | { | |
3425 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3426 | return nfserr_bad_stateid; | |
3427 | if (STALE_STATEID(stateid)) | |
3428 | return nfserr_stale_stateid; | |
3429 | return nfs_ok; | |
3430 | } | |
3431 | ||
dcef0413 | 3432 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
c0a5d93e BF |
3433 | { |
3434 | struct svc_fh *current_fh = &cstate->current_fh; | |
3435 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
3436 | __be32 status; | |
3437 | ||
3438 | if (nfs4_check_fh(current_fh, stp)) | |
3439 | return nfserr_bad_stateid; | |
3440 | status = nfsd4_check_seqid(cstate, sop, seqid); | |
3441 | if (status) | |
3442 | return status; | |
dcef0413 | 3443 | return check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); |
c0a5d93e BF |
3444 | } |
3445 | ||
1da177e4 LT |
3446 | /* |
3447 | * Checks for sequence id mutating operations. | |
3448 | */ | |
b37ad28b | 3449 | static __be32 |
dd453dfd | 3450 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2288d0e3 | 3451 | stateid_t *stateid, char typemask, |
dcef0413 | 3452 | struct nfs4_ol_stateid **stpp) |
1da177e4 | 3453 | { |
0836f587 | 3454 | __be32 status; |
1da177e4 | 3455 | |
8c10cbdb BH |
3456 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
3457 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 3458 | |
1da177e4 | 3459 | *stpp = NULL; |
c0a5d93e BF |
3460 | status = nfs4_nospecial_stateid_checks(stateid); |
3461 | if (status) | |
3462 | return status; | |
2288d0e3 | 3463 | *stpp = find_stateid_by_type(stateid, typemask); |
f4dee24c BF |
3464 | if (*stpp == NULL) |
3465 | return nfserr_expired; | |
c0a5d93e BF |
3466 | cstate->replay_owner = (*stpp)->st_stateowner; |
3467 | renew_client((*stpp)->st_stateowner->so_client); | |
1da177e4 | 3468 | |
c0a5d93e BF |
3469 | return nfs4_seqid_op_checks(cstate, stateid, seqid, *stpp); |
3470 | } | |
39325bd0 | 3471 | |
dcef0413 | 3472 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, stateid_t *stateid, struct nfs4_ol_stateid **stpp) |
c0a5d93e BF |
3473 | { |
3474 | __be32 status; | |
3475 | struct nfs4_openowner *oo; | |
1da177e4 | 3476 | |
c0a5d93e | 3477 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
2288d0e3 | 3478 | NFS4_OPEN_STID, stpp); |
7a8711c9 BF |
3479 | if (status) |
3480 | return status; | |
c0a5d93e BF |
3481 | oo = openowner((*stpp)->st_stateowner); |
3482 | if (!oo->oo_confirmed) | |
3a4f98bb | 3483 | return nfserr_bad_stateid; |
3a4f98bb | 3484 | return nfs_ok; |
1da177e4 LT |
3485 | } |
3486 | ||
b37ad28b | 3487 | __be32 |
ca364317 | 3488 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3489 | struct nfsd4_open_confirm *oc) |
1da177e4 | 3490 | { |
b37ad28b | 3491 | __be32 status; |
fe0750e5 | 3492 | struct nfs4_openowner *oo; |
dcef0413 | 3493 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
3494 | |
3495 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | |
ca364317 BF |
3496 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3497 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3498 | |
ca364317 | 3499 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
3500 | if (status) |
3501 | return status; | |
1da177e4 LT |
3502 | |
3503 | nfs4_lock_state(); | |
3504 | ||
9072d5c6 | 3505 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3506 | oc->oc_seqid, &oc->oc_req_stateid, |
2288d0e3 | 3507 | NFS4_OPEN_STID, &stp); |
9072d5c6 | 3508 | if (status) |
68b66e82 | 3509 | goto out; |
fe0750e5 | 3510 | oo = openowner(stp->st_stateowner); |
68b66e82 | 3511 | status = nfserr_bad_stateid; |
fe0750e5 | 3512 | if (oo->oo_confirmed) |
68b66e82 | 3513 | goto out; |
fe0750e5 | 3514 | oo->oo_confirmed = 1; |
dcef0413 BF |
3515 | update_stateid(&stp->st_stid.sc_stateid); |
3516 | memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
8c10cbdb | 3517 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
dcef0413 | 3518 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); |
c7b9a459 | 3519 | |
fe0750e5 | 3520 | nfsd4_create_clid_dir(oo->oo_owner.so_client); |
68b66e82 | 3521 | status = nfs_ok; |
1da177e4 | 3522 | out: |
5ec094c1 BF |
3523 | if (!cstate->replay_owner) |
3524 | nfs4_unlock_state(); | |
1da177e4 LT |
3525 | return status; |
3526 | } | |
3527 | ||
dcef0413 | 3528 | static inline void nfs4_file_downgrade(struct nfs4_ol_stateid *stp, unsigned int to_access) |
1da177e4 LT |
3529 | { |
3530 | int i; | |
f197c271 | 3531 | |
1da177e4 | 3532 | for (i = 1; i < 4; i++) { |
f197c271 BF |
3533 | if (test_bit(i, &stp->st_access_bmap) && !(i & to_access)) { |
3534 | nfs4_file_put_access(stp->st_file, i); | |
3535 | __clear_bit(i, &stp->st_access_bmap); | |
3536 | } | |
1da177e4 LT |
3537 | } |
3538 | } | |
3539 | ||
3540 | static void | |
3541 | reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) | |
3542 | { | |
3543 | int i; | |
3544 | for (i = 0; i < 4; i++) { | |
3545 | if ((i & deny) != i) | |
3546 | __clear_bit(i, bmap); | |
3547 | } | |
3548 | } | |
3549 | ||
b37ad28b | 3550 | __be32 |
ca364317 BF |
3551 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
3552 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 3553 | struct nfsd4_open_downgrade *od) |
1da177e4 | 3554 | { |
b37ad28b | 3555 | __be32 status; |
dcef0413 | 3556 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
3557 | |
3558 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | |
ca364317 BF |
3559 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3560 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3561 | |
d87a8ade | 3562 | if (!access_valid(od->od_share_access, cstate->minorversion) |
ba5a6a19 | 3563 | || !deny_valid(od->od_share_deny)) |
1da177e4 LT |
3564 | return nfserr_inval; |
3565 | ||
3566 | nfs4_lock_state(); | |
c0a5d93e BF |
3567 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
3568 | &od->od_stateid, &stp); | |
9072d5c6 | 3569 | if (status) |
1da177e4 | 3570 | goto out; |
1da177e4 LT |
3571 | status = nfserr_inval; |
3572 | if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { | |
3573 | dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
3574 | stp->st_access_bmap, od->od_share_access); | |
3575 | goto out; | |
3576 | } | |
3577 | if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { | |
3578 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", | |
3579 | stp->st_deny_bmap, od->od_share_deny); | |
3580 | goto out; | |
3581 | } | |
f197c271 | 3582 | nfs4_file_downgrade(stp, od->od_share_access); |
1da177e4 | 3583 | |
1da177e4 LT |
3584 | reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); |
3585 | ||
dcef0413 BF |
3586 | update_stateid(&stp->st_stid.sc_stateid); |
3587 | memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
3588 | status = nfs_ok; |
3589 | out: | |
5ec094c1 BF |
3590 | if (!cstate->replay_owner) |
3591 | nfs4_unlock_state(); | |
1da177e4 LT |
3592 | return status; |
3593 | } | |
3594 | ||
3595 | /* | |
3596 | * nfs4_unlock_state() called after encode | |
3597 | */ | |
b37ad28b | 3598 | __be32 |
ca364317 | 3599 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3600 | struct nfsd4_close *close) |
1da177e4 | 3601 | { |
b37ad28b | 3602 | __be32 status; |
fe0750e5 | 3603 | struct nfs4_openowner *oo; |
dcef0413 | 3604 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
3605 | |
3606 | dprintk("NFSD: nfsd4_close on file %.*s\n", | |
ca364317 BF |
3607 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3608 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 LT |
3609 | |
3610 | nfs4_lock_state(); | |
3611 | /* check close_lru for replay */ | |
c0a5d93e BF |
3612 | status = nfs4_preprocess_confirmed_seqid_op(cstate, close->cl_seqid, |
3613 | &close->cl_stateid, &stp); | |
f4dee24c BF |
3614 | if (stp == NULL && status == nfserr_expired) { |
3615 | /* | |
3616 | * Also, we should make sure this isn't just the result of | |
3617 | * a replayed close: | |
3618 | */ | |
fe0750e5 | 3619 | oo = search_close_lru(close->cl_stateid.si_stateownerid); |
f4dee24c | 3620 | /* It's not stale; let's assume it's expired: */ |
fe0750e5 | 3621 | if (oo == NULL) |
f4dee24c | 3622 | goto out; |
fe0750e5 BF |
3623 | cstate->replay_owner = &oo->oo_owner; |
3624 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, close->cl_seqid); | |
f4dee24c BF |
3625 | if (status) |
3626 | goto out; | |
3627 | status = nfserr_bad_seqid; | |
3628 | } | |
9072d5c6 | 3629 | if (status) |
1da177e4 | 3630 | goto out; |
fe0750e5 | 3631 | oo = openowner(stp->st_stateowner); |
1da177e4 | 3632 | status = nfs_ok; |
dcef0413 BF |
3633 | update_stateid(&stp->st_stid.sc_stateid); |
3634 | memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3635 | |
04ef5954 | 3636 | /* release_stateid() calls nfsd_close() if needed */ |
2283963f | 3637 | release_open_stateid(stp); |
04ef5954 BF |
3638 | |
3639 | /* place unused nfs4_stateowners on so_close_lru list to be | |
3640 | * released by the laundromat service after the lease period | |
3641 | * to enable us to handle CLOSE replay | |
3642 | */ | |
fe0750e5 BF |
3643 | if (list_empty(&oo->oo_owner.so_stateids)) |
3644 | move_to_close_lru(oo); | |
1da177e4 | 3645 | out: |
5ec094c1 BF |
3646 | if (!cstate->replay_owner) |
3647 | nfs4_unlock_state(); | |
1da177e4 LT |
3648 | return status; |
3649 | } | |
3650 | ||
b37ad28b | 3651 | __be32 |
ca364317 BF |
3652 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3653 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 3654 | { |
203a8c8e BF |
3655 | struct nfs4_delegation *dp; |
3656 | stateid_t *stateid = &dr->dr_stateid; | |
3657 | struct inode *inode; | |
b37ad28b | 3658 | __be32 status; |
1da177e4 | 3659 | |
ca364317 | 3660 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e BF |
3661 | return status; |
3662 | inode = cstate->current_fh.fh_dentry->d_inode; | |
1da177e4 LT |
3663 | |
3664 | nfs4_lock_state(); | |
203a8c8e BF |
3665 | status = nfserr_bad_stateid; |
3666 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3667 | goto out; | |
3668 | status = nfserr_stale_stateid; | |
3669 | if (STALE_STATEID(stateid)) | |
3670 | goto out; | |
7e0f7cf5 | 3671 | status = nfserr_bad_stateid; |
203a8c8e BF |
3672 | if (!is_delegation_stateid(stateid)) |
3673 | goto out; | |
33515142 | 3674 | status = nfserr_expired; |
203a8c8e | 3675 | dp = find_delegation_stateid(inode, stateid); |
e4e83ea4 | 3676 | if (!dp) |
203a8c8e | 3677 | goto out; |
d5477a8d | 3678 | status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); |
203a8c8e BF |
3679 | if (status) |
3680 | goto out; | |
3681 | renew_client(dp->dl_client); | |
3682 | ||
3683 | unhash_delegation(dp); | |
1da177e4 | 3684 | out: |
203a8c8e BF |
3685 | nfs4_unlock_state(); |
3686 | ||
1da177e4 LT |
3687 | return status; |
3688 | } | |
3689 | ||
3690 | ||
3691 | /* | |
3692 | * Lock owner state (byte-range locks) | |
3693 | */ | |
3694 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) | |
3695 | #define LOCK_HASH_BITS 8 | |
3696 | #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) | |
3697 | #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) | |
3698 | ||
87df4de8 BH |
3699 | static inline u64 |
3700 | end_offset(u64 start, u64 len) | |
3701 | { | |
3702 | u64 end; | |
3703 | ||
3704 | end = start + len; | |
3705 | return end >= start ? end: NFS4_MAX_UINT64; | |
3706 | } | |
3707 | ||
3708 | /* last octet in a range */ | |
3709 | static inline u64 | |
3710 | last_byte_offset(u64 start, u64 len) | |
3711 | { | |
3712 | u64 end; | |
3713 | ||
3714 | BUG_ON(!len); | |
3715 | end = start + len; | |
3716 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
3717 | } | |
3718 | ||
ddc04c41 BF |
3719 | static unsigned int lockownerid_hashval(u32 id) |
3720 | { | |
3721 | return id & LOCK_HASH_MASK; | |
3722 | } | |
1da177e4 LT |
3723 | |
3724 | static inline unsigned int | |
3725 | lock_ownerstr_hashval(struct inode *inode, u32 cl_id, | |
3726 | struct xdr_netobj *ownername) | |
3727 | { | |
3728 | return (file_hashval(inode) + cl_id | |
3729 | + opaque_hashval(ownername->data, ownername->len)) | |
3730 | & LOCK_HASH_MASK; | |
3731 | } | |
3732 | ||
3733 | static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; | |
3734 | static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; | |
1da177e4 | 3735 | |
e1ca12df BS |
3736 | static struct nfs4_delegation * |
3737 | search_for_delegation(stateid_t *stid) | |
3738 | { | |
3739 | struct nfs4_file *fp; | |
3740 | struct nfs4_delegation *dp; | |
3741 | struct list_head *pos; | |
3742 | int i; | |
3743 | ||
3744 | for (i = 0; i < FILE_HASH_SIZE; i++) { | |
3745 | list_for_each_entry(fp, &file_hashtbl[i], fi_hash) { | |
3746 | list_for_each(pos, &fp->fi_delegations) { | |
3747 | dp = list_entry(pos, struct nfs4_delegation, dl_perfile); | |
d5477a8d | 3748 | if (same_stateid(&dp->dl_stid.sc_stateid, stid)) |
e1ca12df BS |
3749 | return dp; |
3750 | } | |
3751 | } | |
3752 | } | |
3753 | return NULL; | |
3754 | } | |
3755 | ||
1da177e4 LT |
3756 | static struct nfs4_delegation * |
3757 | find_delegation_stateid(struct inode *ino, stateid_t *stid) | |
3758 | { | |
13cd2184 N |
3759 | struct nfs4_file *fp; |
3760 | struct nfs4_delegation *dl; | |
1da177e4 | 3761 | |
8c10cbdb BH |
3762 | dprintk("NFSD: %s: stateid=" STATEID_FMT "\n", __func__, |
3763 | STATEID_VAL(stid)); | |
1da177e4 | 3764 | |
1da177e4 | 3765 | fp = find_file(ino); |
13cd2184 N |
3766 | if (!fp) |
3767 | return NULL; | |
3768 | dl = find_delegation_file(fp, stid); | |
3769 | put_nfs4_file(fp); | |
3770 | return dl; | |
1da177e4 LT |
3771 | } |
3772 | ||
3773 | /* | |
3774 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
3775 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
3776 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
3777 | * locking, this prevents us from being completely protocol-compliant. The | |
3778 | * real solution to this problem is to start using unsigned file offsets in | |
3779 | * the VFS, but this is a very deep change! | |
3780 | */ | |
3781 | static inline void | |
3782 | nfs4_transform_lock_offset(struct file_lock *lock) | |
3783 | { | |
3784 | if (lock->fl_start < 0) | |
3785 | lock->fl_start = OFFSET_MAX; | |
3786 | if (lock->fl_end < 0) | |
3787 | lock->fl_end = OFFSET_MAX; | |
3788 | } | |
3789 | ||
d5b9026a N |
3790 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
3791 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 3792 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 3793 | }; |
1da177e4 LT |
3794 | |
3795 | static inline void | |
3796 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
3797 | { | |
fe0750e5 | 3798 | struct nfs4_lockowner *lo; |
1da177e4 | 3799 | |
d5b9026a | 3800 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 BF |
3801 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
3802 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, | |
3803 | lo->lo_owner.so_owner.len, GFP_KERNEL); | |
7c13f344 BF |
3804 | if (!deny->ld_owner.data) |
3805 | /* We just don't care that much */ | |
3806 | goto nevermind; | |
fe0750e5 BF |
3807 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
3808 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; | |
d5b9026a | 3809 | } else { |
7c13f344 BF |
3810 | nevermind: |
3811 | deny->ld_owner.len = 0; | |
3812 | deny->ld_owner.data = NULL; | |
d5b9026a N |
3813 | deny->ld_clientid.cl_boot = 0; |
3814 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
3815 | } |
3816 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
3817 | deny->ld_length = NFS4_MAX_UINT64; |
3818 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
3819 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
3820 | deny->ld_type = NFS4_READ_LT; | |
3821 | if (fl->fl_type != F_RDLCK) | |
3822 | deny->ld_type = NFS4_WRITE_LT; | |
3823 | } | |
3824 | ||
fe0750e5 BF |
3825 | static struct nfs4_lockowner * |
3826 | find_lockowner_str(struct inode *inode, clientid_t *clid, | |
1da177e4 LT |
3827 | struct xdr_netobj *owner) |
3828 | { | |
3829 | unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); | |
3830 | struct nfs4_stateowner *op; | |
3831 | ||
3832 | list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { | |
599e0a22 | 3833 | if (same_owner_str(op, owner, clid)) |
fe0750e5 | 3834 | return lockowner(op); |
1da177e4 LT |
3835 | } |
3836 | return NULL; | |
3837 | } | |
3838 | ||
dcef0413 | 3839 | static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp) |
ff194bd9 BF |
3840 | { |
3841 | unsigned int idhashval; | |
3842 | ||
fe0750e5 BF |
3843 | idhashval = lockownerid_hashval(lo->lo_owner.so_id); |
3844 | list_add(&lo->lo_owner.so_idhash, &lock_ownerid_hashtbl[idhashval]); | |
3845 | list_add(&lo->lo_owner.so_strhash, &lock_ownerstr_hashtbl[strhashval]); | |
3846 | list_add(&lo->lo_perstateid, &open_stp->st_lockowners); | |
ff194bd9 BF |
3847 | } |
3848 | ||
1da177e4 LT |
3849 | /* |
3850 | * Alloc a lock owner structure. | |
3851 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 3852 | * occurred. |
1da177e4 LT |
3853 | * |
3854 | * strhashval = lock_ownerstr_hashval | |
1da177e4 LT |
3855 | */ |
3856 | ||
fe0750e5 | 3857 | static struct nfs4_lockowner * |
dcef0413 | 3858 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) { |
fe0750e5 | 3859 | struct nfs4_lockowner *lo; |
1da177e4 | 3860 | |
fe0750e5 BF |
3861 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
3862 | if (!lo) | |
1da177e4 | 3863 | return NULL; |
fe0750e5 BF |
3864 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
3865 | lo->lo_owner.so_is_open_owner = 0; | |
b59e3c0e NB |
3866 | /* It is the openowner seqid that will be incremented in encode in the |
3867 | * case of new lockowners; so increment the lock seqid manually: */ | |
fe0750e5 BF |
3868 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; |
3869 | hash_lockowner(lo, strhashval, clp, open_stp); | |
3870 | return lo; | |
1da177e4 LT |
3871 | } |
3872 | ||
dcef0413 BF |
3873 | static struct nfs4_ol_stateid * |
3874 | alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 3875 | { |
dcef0413 | 3876 | struct nfs4_ol_stateid *stp; |
1da177e4 | 3877 | |
5ac049ac N |
3878 | stp = nfs4_alloc_stateid(); |
3879 | if (stp == NULL) | |
1da177e4 | 3880 | goto out; |
8beefa24 | 3881 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 BF |
3882 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
3883 | stp->st_stateowner = &lo->lo_owner; | |
dcef0413 | 3884 | stp->st_stid.sc_type = NFS4_LOCK_STID; |
13cd2184 | 3885 | get_nfs4_file(fp); |
1da177e4 | 3886 | stp->st_file = fp; |
dcef0413 BF |
3887 | stp->st_stid.sc_stateid.si_boot = boot_time; |
3888 | stp->st_stid.sc_stateid.si_stateownerid = lo->lo_owner.so_id; | |
3889 | stp->st_stid.sc_stateid.si_fileid = fp->fi_id; | |
73997dc4 | 3890 | /* note will be incremented before first return to client: */ |
dcef0413 | 3891 | stp->st_stid.sc_stateid.si_generation = 0; |
36d44c60 | 3892 | hash_stid(&stp->st_stid); |
0997b173 | 3893 | stp->st_access_bmap = 0; |
1da177e4 | 3894 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 3895 | stp->st_openstp = open_stp; |
1da177e4 LT |
3896 | |
3897 | out: | |
3898 | return stp; | |
3899 | } | |
3900 | ||
fd39ca9a | 3901 | static int |
1da177e4 LT |
3902 | check_lock_length(u64 offset, u64 length) |
3903 | { | |
87df4de8 | 3904 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
3905 | LOFF_OVERFLOW(offset, length))); |
3906 | } | |
3907 | ||
dcef0413 | 3908 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 BF |
3909 | { |
3910 | struct nfs4_file *fp = lock_stp->st_file; | |
3911 | int oflag = nfs4_access_to_omode(access); | |
3912 | ||
3913 | if (test_bit(access, &lock_stp->st_access_bmap)) | |
3914 | return; | |
3915 | nfs4_file_get_access(fp, oflag); | |
3916 | __set_bit(access, &lock_stp->st_access_bmap); | |
3917 | } | |
3918 | ||
1da177e4 LT |
3919 | /* |
3920 | * LOCK operation | |
3921 | */ | |
b37ad28b | 3922 | __be32 |
ca364317 | 3923 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3924 | struct nfsd4_lock *lock) |
1da177e4 | 3925 | { |
fe0750e5 BF |
3926 | struct nfs4_openowner *open_sop = NULL; |
3927 | struct nfs4_lockowner *lock_sop = NULL; | |
dcef0413 | 3928 | struct nfs4_ol_stateid *lock_stp; |
7d947842 BF |
3929 | struct nfs4_file *fp; |
3930 | struct file *filp = NULL; | |
1da177e4 | 3931 | struct file_lock file_lock; |
8dc7c311 | 3932 | struct file_lock conflock; |
b37ad28b | 3933 | __be32 status = 0; |
1da177e4 | 3934 | unsigned int strhashval; |
b34f27aa | 3935 | int lkflg; |
b8dd7b9a | 3936 | int err; |
1da177e4 LT |
3937 | |
3938 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
3939 | (long long) lock->lk_offset, | |
3940 | (long long) lock->lk_length); | |
3941 | ||
1da177e4 LT |
3942 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
3943 | return nfserr_inval; | |
3944 | ||
ca364317 | 3945 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 3946 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
3947 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
3948 | return status; | |
3949 | } | |
3950 | ||
1da177e4 LT |
3951 | nfs4_lock_state(); |
3952 | ||
3953 | if (lock->lk_is_new) { | |
893f8770 N |
3954 | /* |
3955 | * Client indicates that this is a new lockowner. | |
3956 | * Use open owner and open stateid to create lock owner and | |
3957 | * lock stateid. | |
3958 | */ | |
dcef0413 | 3959 | struct nfs4_ol_stateid *open_stp = NULL; |
1da177e4 LT |
3960 | |
3961 | status = nfserr_stale_clientid; | |
60adfc50 AA |
3962 | if (!nfsd4_has_session(cstate) && |
3963 | STALE_CLIENTID(&lock->lk_new_clientid)) | |
1da177e4 | 3964 | goto out; |
1da177e4 | 3965 | |
1da177e4 | 3966 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 3967 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
3968 | lock->lk_new_open_seqid, |
3969 | &lock->lk_new_open_stateid, | |
c0a5d93e | 3970 | &open_stp); |
37515177 | 3971 | if (status) |
1da177e4 | 3972 | goto out; |
fe0750e5 | 3973 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 3974 | status = nfserr_bad_stateid; |
b34f27aa | 3975 | if (!nfsd4_has_session(cstate) && |
fe0750e5 | 3976 | !same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
b34f27aa BF |
3977 | &lock->v.new.clientid)) |
3978 | goto out; | |
1da177e4 LT |
3979 | /* create lockowner and lock stateid */ |
3980 | fp = open_stp->st_file; | |
fe0750e5 BF |
3981 | strhashval = lock_ownerstr_hashval(fp->fi_inode, |
3982 | open_sop->oo_owner.so_client->cl_clientid.cl_id, | |
1da177e4 | 3983 | &lock->v.new.owner); |
3e9e3dbe N |
3984 | /* XXX: Do we need to check for duplicate stateowners on |
3985 | * the same file, or should they just be allowed (and | |
3986 | * create new stateids)? */ | |
3e772463 | 3987 | status = nfserr_jukebox; |
b59e3c0e | 3988 | lock_sop = alloc_init_lock_stateowner(strhashval, |
fe0750e5 | 3989 | open_sop->oo_owner.so_client, open_stp, lock); |
b59e3c0e | 3990 | if (lock_sop == NULL) |
1da177e4 | 3991 | goto out; |
b59e3c0e | 3992 | lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); |
8a280510 | 3993 | if (lock_stp == NULL) |
1da177e4 | 3994 | goto out; |
1da177e4 LT |
3995 | } else { |
3996 | /* lock (lock owner + lock stateid) already exists */ | |
dd453dfd | 3997 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
3998 | lock->lk_old_lock_seqid, |
3999 | &lock->lk_old_lock_stateid, | |
2288d0e3 | 4000 | NFS4_LOCK_STID, &lock_stp); |
1da177e4 LT |
4001 | if (status) |
4002 | goto out; | |
fe0750e5 | 4003 | lock_sop = lockowner(lock_stp->st_stateowner); |
7d947842 | 4004 | fp = lock_stp->st_file; |
1da177e4 | 4005 | } |
9072d5c6 | 4006 | /* lock_sop and lock_stp have been created or found */ |
1da177e4 | 4007 | |
b34f27aa BF |
4008 | lkflg = setlkflg(lock->lk_type); |
4009 | status = nfs4_check_openmode(lock_stp, lkflg); | |
4010 | if (status) | |
4011 | goto out; | |
4012 | ||
0dd395dc | 4013 | status = nfserr_grace; |
af558e33 | 4014 | if (locks_in_grace() && !lock->lk_reclaim) |
0dd395dc N |
4015 | goto out; |
4016 | status = nfserr_no_grace; | |
af558e33 | 4017 | if (!locks_in_grace() && lock->lk_reclaim) |
0dd395dc N |
4018 | goto out; |
4019 | ||
1da177e4 LT |
4020 | locks_init_lock(&file_lock); |
4021 | switch (lock->lk_type) { | |
4022 | case NFS4_READ_LT: | |
4023 | case NFS4_READW_LT: | |
0997b173 BF |
4024 | filp = find_readable_file(lock_stp->st_file); |
4025 | if (filp) | |
4026 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
1da177e4 | 4027 | file_lock.fl_type = F_RDLCK; |
529d7b2a | 4028 | break; |
1da177e4 LT |
4029 | case NFS4_WRITE_LT: |
4030 | case NFS4_WRITEW_LT: | |
0997b173 BF |
4031 | filp = find_writeable_file(lock_stp->st_file); |
4032 | if (filp) | |
4033 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
1da177e4 | 4034 | file_lock.fl_type = F_WRLCK; |
529d7b2a | 4035 | break; |
1da177e4 LT |
4036 | default: |
4037 | status = nfserr_inval; | |
4038 | goto out; | |
4039 | } | |
f9d7562f BF |
4040 | if (!filp) { |
4041 | status = nfserr_openmode; | |
4042 | goto out; | |
4043 | } | |
b59e3c0e | 4044 | file_lock.fl_owner = (fl_owner_t)lock_sop; |
1da177e4 LT |
4045 | file_lock.fl_pid = current->tgid; |
4046 | file_lock.fl_file = filp; | |
4047 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 4048 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
4049 | |
4050 | file_lock.fl_start = lock->lk_offset; | |
87df4de8 | 4051 | file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); |
1da177e4 LT |
4052 | nfs4_transform_lock_offset(&file_lock); |
4053 | ||
4054 | /* | |
4055 | * Try to lock the file in the VFS. | |
4056 | * Note: locks.c uses the BKL to protect the inode's lock list. | |
4057 | */ | |
4058 | ||
529d7b2a | 4059 | err = vfs_lock_file(filp, F_SETLK, &file_lock, &conflock); |
b8dd7b9a | 4060 | switch (-err) { |
1da177e4 | 4061 | case 0: /* success! */ |
dcef0413 BF |
4062 | update_stateid(&lock_stp->st_stid.sc_stateid); |
4063 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, | |
1da177e4 | 4064 | sizeof(stateid_t)); |
b8dd7b9a | 4065 | status = 0; |
eb76b3fd AA |
4066 | break; |
4067 | case (EAGAIN): /* conflock holds conflicting lock */ | |
4068 | status = nfserr_denied; | |
4069 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
4070 | nfs4_set_lock_denied(&conflock, &lock->lk_denied); | |
4071 | break; | |
1da177e4 LT |
4072 | case (EDEADLK): |
4073 | status = nfserr_deadlock; | |
eb76b3fd | 4074 | break; |
3e772463 | 4075 | default: |
fd85b817 | 4076 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 4077 | status = nfserrno(err); |
eb76b3fd | 4078 | break; |
1da177e4 | 4079 | } |
1da177e4 | 4080 | out: |
8a280510 | 4081 | if (status && lock->lk_is_new && lock_sop) |
f044ff83 | 4082 | release_lockowner(lock_sop); |
5ec094c1 BF |
4083 | if (!cstate->replay_owner) |
4084 | nfs4_unlock_state(); | |
1da177e4 LT |
4085 | return status; |
4086 | } | |
4087 | ||
55ef1274 BF |
4088 | /* |
4089 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
4090 | * so we do a temporary open here just to get an open file to pass to | |
4091 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
4092 | * inode operation.) | |
4093 | */ | |
4094 | static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) | |
4095 | { | |
4096 | struct file *file; | |
4097 | int err; | |
4098 | ||
4099 | err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); | |
4100 | if (err) | |
4101 | return err; | |
4102 | err = vfs_test_lock(file, lock); | |
4103 | nfsd_close(file); | |
4104 | return err; | |
4105 | } | |
4106 | ||
1da177e4 LT |
4107 | /* |
4108 | * LOCKT operation | |
4109 | */ | |
b37ad28b | 4110 | __be32 |
ca364317 BF |
4111 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4112 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
4113 | { |
4114 | struct inode *inode; | |
1da177e4 | 4115 | struct file_lock file_lock; |
fe0750e5 | 4116 | struct nfs4_lockowner *lo; |
fd85b817 | 4117 | int error; |
b37ad28b | 4118 | __be32 status; |
1da177e4 | 4119 | |
af558e33 | 4120 | if (locks_in_grace()) |
1da177e4 LT |
4121 | return nfserr_grace; |
4122 | ||
4123 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
4124 | return nfserr_inval; | |
4125 | ||
1da177e4 LT |
4126 | nfs4_lock_state(); |
4127 | ||
4128 | status = nfserr_stale_clientid; | |
60adfc50 | 4129 | if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) |
1da177e4 | 4130 | goto out; |
1da177e4 | 4131 | |
75c096f7 | 4132 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 4133 | goto out; |
1da177e4 | 4134 | |
ca364317 | 4135 | inode = cstate->current_fh.fh_dentry->d_inode; |
1da177e4 LT |
4136 | locks_init_lock(&file_lock); |
4137 | switch (lockt->lt_type) { | |
4138 | case NFS4_READ_LT: | |
4139 | case NFS4_READW_LT: | |
4140 | file_lock.fl_type = F_RDLCK; | |
4141 | break; | |
4142 | case NFS4_WRITE_LT: | |
4143 | case NFS4_WRITEW_LT: | |
4144 | file_lock.fl_type = F_WRLCK; | |
4145 | break; | |
4146 | default: | |
2fdada03 | 4147 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
4148 | status = nfserr_inval; |
4149 | goto out; | |
4150 | } | |
4151 | ||
fe0750e5 BF |
4152 | lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner); |
4153 | if (lo) | |
4154 | file_lock.fl_owner = (fl_owner_t)lo; | |
1da177e4 LT |
4155 | file_lock.fl_pid = current->tgid; |
4156 | file_lock.fl_flags = FL_POSIX; | |
4157 | ||
4158 | file_lock.fl_start = lockt->lt_offset; | |
87df4de8 | 4159 | file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); |
1da177e4 LT |
4160 | |
4161 | nfs4_transform_lock_offset(&file_lock); | |
4162 | ||
1da177e4 | 4163 | status = nfs_ok; |
55ef1274 | 4164 | error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); |
fd85b817 ME |
4165 | if (error) { |
4166 | status = nfserrno(error); | |
4167 | goto out; | |
4168 | } | |
9d6a8c5c | 4169 | if (file_lock.fl_type != F_UNLCK) { |
1da177e4 | 4170 | status = nfserr_denied; |
9d6a8c5c | 4171 | nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); |
1da177e4 LT |
4172 | } |
4173 | out: | |
4174 | nfs4_unlock_state(); | |
4175 | return status; | |
4176 | } | |
4177 | ||
b37ad28b | 4178 | __be32 |
ca364317 | 4179 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4180 | struct nfsd4_locku *locku) |
1da177e4 | 4181 | { |
dcef0413 | 4182 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
4183 | struct file *filp = NULL; |
4184 | struct file_lock file_lock; | |
b37ad28b | 4185 | __be32 status; |
b8dd7b9a | 4186 | int err; |
1da177e4 LT |
4187 | |
4188 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", | |
4189 | (long long) locku->lu_offset, | |
4190 | (long long) locku->lu_length); | |
4191 | ||
4192 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
4193 | return nfserr_inval; | |
4194 | ||
4195 | nfs4_lock_state(); | |
4196 | ||
9072d5c6 | 4197 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
2288d0e3 | 4198 | &locku->lu_stateid, NFS4_LOCK_STID, &stp); |
9072d5c6 | 4199 | if (status) |
1da177e4 | 4200 | goto out; |
f9d7562f BF |
4201 | filp = find_any_file(stp->st_file); |
4202 | if (!filp) { | |
4203 | status = nfserr_lock_range; | |
4204 | goto out; | |
4205 | } | |
1da177e4 LT |
4206 | BUG_ON(!filp); |
4207 | locks_init_lock(&file_lock); | |
4208 | file_lock.fl_type = F_UNLCK; | |
fe0750e5 | 4209 | file_lock.fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); |
1da177e4 LT |
4210 | file_lock.fl_pid = current->tgid; |
4211 | file_lock.fl_file = filp; | |
4212 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 4213 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
4214 | file_lock.fl_start = locku->lu_offset; |
4215 | ||
87df4de8 | 4216 | file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); |
1da177e4 LT |
4217 | nfs4_transform_lock_offset(&file_lock); |
4218 | ||
4219 | /* | |
4220 | * Try to unlock the file in the VFS. | |
4221 | */ | |
fd85b817 | 4222 | err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); |
b8dd7b9a | 4223 | if (err) { |
fd85b817 | 4224 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
4225 | goto out_nfserr; |
4226 | } | |
4227 | /* | |
4228 | * OK, unlock succeeded; the only thing left to do is update the stateid. | |
4229 | */ | |
dcef0413 BF |
4230 | update_stateid(&stp->st_stid.sc_stateid); |
4231 | memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
4232 | |
4233 | out: | |
1da177e4 LT |
4234 | nfs4_unlock_state(); |
4235 | return status; | |
4236 | ||
4237 | out_nfserr: | |
b8dd7b9a | 4238 | status = nfserrno(err); |
1da177e4 LT |
4239 | goto out; |
4240 | } | |
4241 | ||
4242 | /* | |
4243 | * returns | |
4244 | * 1: locks held by lockowner | |
4245 | * 0: no locks held by lockowner | |
4246 | */ | |
4247 | static int | |
fe0750e5 | 4248 | check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner) |
1da177e4 LT |
4249 | { |
4250 | struct file_lock **flpp; | |
f9d7562f | 4251 | struct inode *inode = filp->fi_inode; |
1da177e4 LT |
4252 | int status = 0; |
4253 | ||
b89f4321 | 4254 | lock_flocks(); |
1da177e4 | 4255 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
796dadfd | 4256 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
4257 | status = 1; |
4258 | goto out; | |
796dadfd | 4259 | } |
1da177e4 LT |
4260 | } |
4261 | out: | |
b89f4321 | 4262 | unlock_flocks(); |
1da177e4 LT |
4263 | return status; |
4264 | } | |
4265 | ||
b37ad28b | 4266 | __be32 |
b591480b BF |
4267 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
4268 | struct nfsd4_compound_state *cstate, | |
4269 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
4270 | { |
4271 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe | 4272 | struct nfs4_stateowner *sop; |
fe0750e5 | 4273 | struct nfs4_lockowner *lo; |
dcef0413 | 4274 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4275 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe N |
4276 | struct list_head matches; |
4277 | int i; | |
b37ad28b | 4278 | __be32 status; |
1da177e4 LT |
4279 | |
4280 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
4281 | clid->cl_boot, clid->cl_id); | |
4282 | ||
4283 | /* XXX check for lease expiration */ | |
4284 | ||
4285 | status = nfserr_stale_clientid; | |
849823c5 | 4286 | if (STALE_CLIENTID(clid)) |
1da177e4 | 4287 | return status; |
1da177e4 LT |
4288 | |
4289 | nfs4_lock_state(); | |
4290 | ||
3e9e3dbe N |
4291 | status = nfserr_locks_held; |
4292 | /* XXX: we're doing a linear search through all the lockowners. | |
4293 | * Yipes! For now we'll just hope clients aren't really using | |
4294 | * release_lockowner much, but eventually we have to fix these | |
4295 | * data structures. */ | |
4296 | INIT_LIST_HEAD(&matches); | |
4297 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
4298 | list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { | |
599e0a22 | 4299 | if (!same_owner_str(sop, owner, clid)) |
3e9e3dbe N |
4300 | continue; |
4301 | list_for_each_entry(stp, &sop->so_stateids, | |
4302 | st_perstateowner) { | |
fe0750e5 BF |
4303 | lo = lockowner(sop); |
4304 | if (check_for_locks(stp->st_file, lo)) | |
3e9e3dbe | 4305 | goto out; |
fe0750e5 | 4306 | list_add(&lo->lo_list, &matches); |
3e9e3dbe | 4307 | } |
1da177e4 | 4308 | } |
3e9e3dbe N |
4309 | } |
4310 | /* Clients probably won't expect us to return with some (but not all) | |
4311 | * of the lockowner state released; so don't release any until all | |
4312 | * have been checked. */ | |
4313 | status = nfs_ok; | |
0fa822e4 | 4314 | while (!list_empty(&matches)) { |
fe0750e5 BF |
4315 | lo = list_entry(matches.next, struct nfs4_lockowner, |
4316 | lo_list); | |
0fa822e4 N |
4317 | /* unhash_stateowner deletes so_perclient only |
4318 | * for openowners. */ | |
fe0750e5 BF |
4319 | list_del(&lo->lo_list); |
4320 | release_lockowner(lo); | |
1da177e4 LT |
4321 | } |
4322 | out: | |
4323 | nfs4_unlock_state(); | |
4324 | return status; | |
4325 | } | |
4326 | ||
4327 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 4328 | alloc_reclaim(void) |
1da177e4 | 4329 | { |
a55370a3 | 4330 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
4331 | } |
4332 | ||
c7b9a459 | 4333 | int |
a1bcecd2 | 4334 | nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) |
c7b9a459 N |
4335 | { |
4336 | unsigned int strhashval = clientstr_hashval(name); | |
4337 | struct nfs4_client *clp; | |
4338 | ||
e203d506 | 4339 | clp = find_confirmed_client_by_str(name, strhashval); |
c7b9a459 N |
4340 | return clp ? 1 : 0; |
4341 | } | |
4342 | ||
1da177e4 LT |
4343 | /* |
4344 | * failure => all reset bets are off, nfserr_no_grace... | |
4345 | */ | |
190e4fbf N |
4346 | int |
4347 | nfs4_client_to_reclaim(const char *name) | |
1da177e4 LT |
4348 | { |
4349 | unsigned int strhashval; | |
4350 | struct nfs4_client_reclaim *crp = NULL; | |
4351 | ||
a55370a3 N |
4352 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
4353 | crp = alloc_reclaim(); | |
1da177e4 LT |
4354 | if (!crp) |
4355 | return 0; | |
a55370a3 | 4356 | strhashval = clientstr_hashval(name); |
1da177e4 LT |
4357 | INIT_LIST_HEAD(&crp->cr_strhash); |
4358 | list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); | |
a55370a3 | 4359 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
1da177e4 LT |
4360 | reclaim_str_hashtbl_size++; |
4361 | return 1; | |
4362 | } | |
4363 | ||
4364 | static void | |
4365 | nfs4_release_reclaim(void) | |
4366 | { | |
4367 | struct nfs4_client_reclaim *crp = NULL; | |
4368 | int i; | |
4369 | ||
1da177e4 LT |
4370 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4371 | while (!list_empty(&reclaim_str_hashtbl[i])) { | |
4372 | crp = list_entry(reclaim_str_hashtbl[i].next, | |
4373 | struct nfs4_client_reclaim, cr_strhash); | |
4374 | list_del(&crp->cr_strhash); | |
1da177e4 LT |
4375 | kfree(crp); |
4376 | reclaim_str_hashtbl_size--; | |
4377 | } | |
4378 | } | |
4379 | BUG_ON(reclaim_str_hashtbl_size); | |
4380 | } | |
4381 | ||
4382 | /* | |
4383 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
fd39ca9a | 4384 | static struct nfs4_client_reclaim * |
1da177e4 LT |
4385 | nfs4_find_reclaim_client(clientid_t *clid) |
4386 | { | |
4387 | unsigned int strhashval; | |
4388 | struct nfs4_client *clp; | |
4389 | struct nfs4_client_reclaim *crp = NULL; | |
4390 | ||
4391 | ||
4392 | /* find clientid in conf_id_hashtbl */ | |
4393 | clp = find_confirmed_client(clid); | |
4394 | if (clp == NULL) | |
4395 | return NULL; | |
4396 | ||
a55370a3 N |
4397 | dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", |
4398 | clp->cl_name.len, clp->cl_name.data, | |
4399 | clp->cl_recdir); | |
1da177e4 LT |
4400 | |
4401 | /* find clp->cl_name in reclaim_str_hashtbl */ | |
a55370a3 | 4402 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 | 4403 | list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { |
a55370a3 | 4404 | if (same_name(crp->cr_recdir, clp->cl_recdir)) { |
1da177e4 LT |
4405 | return crp; |
4406 | } | |
4407 | } | |
4408 | return NULL; | |
4409 | } | |
4410 | ||
4411 | /* | |
4412 | * Called from OPEN. Look for clientid in reclaim list. | |
4413 | */ | |
b37ad28b | 4414 | __be32 |
1da177e4 LT |
4415 | nfs4_check_open_reclaim(clientid_t *clid) |
4416 | { | |
dfc83565 | 4417 | return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; |
1da177e4 LT |
4418 | } |
4419 | ||
ac4d8ff2 | 4420 | /* initialization to perform at module load time: */ |
1da177e4 | 4421 | |
e8ff2a84 | 4422 | int |
ac4d8ff2 | 4423 | nfs4_state_init(void) |
1da177e4 | 4424 | { |
e8ff2a84 | 4425 | int i, status; |
1da177e4 | 4426 | |
e8ff2a84 BF |
4427 | status = nfsd4_init_slabs(); |
4428 | if (status) | |
4429 | return status; | |
1da177e4 LT |
4430 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4431 | INIT_LIST_HEAD(&conf_id_hashtbl[i]); | |
4432 | INIT_LIST_HEAD(&conf_str_hashtbl[i]); | |
4433 | INIT_LIST_HEAD(&unconf_str_hashtbl[i]); | |
4434 | INIT_LIST_HEAD(&unconf_id_hashtbl[i]); | |
02cb2858 | 4435 | INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); |
1da177e4 | 4436 | } |
5282fd72 ME |
4437 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
4438 | INIT_LIST_HEAD(&sessionid_hashtbl[i]); | |
1da177e4 LT |
4439 | for (i = 0; i < FILE_HASH_SIZE; i++) { |
4440 | INIT_LIST_HEAD(&file_hashtbl[i]); | |
4441 | } | |
506f275f BF |
4442 | for (i = 0; i < OPEN_OWNER_HASH_SIZE; i++) { |
4443 | INIT_LIST_HEAD(&open_ownerstr_hashtbl[i]); | |
4444 | INIT_LIST_HEAD(&open_ownerid_hashtbl[i]); | |
1da177e4 | 4445 | } |
b79abadd | 4446 | for (i = 0; i < STATEID_HASH_SIZE; i++) |
1da177e4 | 4447 | INIT_LIST_HEAD(&stateid_hashtbl[i]); |
1da177e4 LT |
4448 | for (i = 0; i < LOCK_HASH_SIZE; i++) { |
4449 | INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); | |
4450 | INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); | |
4451 | } | |
1da177e4 | 4452 | memset(&onestateid, ~0, sizeof(stateid_t)); |
1da177e4 LT |
4453 | INIT_LIST_HEAD(&close_lru); |
4454 | INIT_LIST_HEAD(&client_lru); | |
4455 | INIT_LIST_HEAD(&del_recall_lru); | |
ac4d8ff2 | 4456 | reclaim_str_hashtbl_size = 0; |
e8ff2a84 | 4457 | return 0; |
ac4d8ff2 N |
4458 | } |
4459 | ||
190e4fbf N |
4460 | static void |
4461 | nfsd4_load_reboot_recovery_data(void) | |
4462 | { | |
4463 | int status; | |
4464 | ||
0964a3d3 | 4465 | nfs4_lock_state(); |
48483bf2 | 4466 | nfsd4_init_recdir(); |
190e4fbf | 4467 | status = nfsd4_recdir_load(); |
0964a3d3 | 4468 | nfs4_unlock_state(); |
190e4fbf N |
4469 | if (status) |
4470 | printk("NFSD: Failure reading reboot recovery data\n"); | |
4471 | } | |
4472 | ||
c2f1a551 MS |
4473 | /* |
4474 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
4475 | * client may quite reasonably hang on to a delegation as long as it has | |
4476 | * the inode cached. This becomes an obvious problem the first time a | |
4477 | * client's inode cache approaches the size of the server's total memory. | |
4478 | * | |
4479 | * For now we avoid this problem by imposing a hard limit on the number | |
4480 | * of delegations, which varies according to the server's memory size. | |
4481 | */ | |
4482 | static void | |
4483 | set_max_delegations(void) | |
4484 | { | |
4485 | /* | |
4486 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
4487 | * estimates suggest that in the worst case (where every delegation | |
4488 | * is for a different inode), a delegation could take about 1.5K, | |
4489 | * giving a worst case usage of about 6% of memory. | |
4490 | */ | |
4491 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
4492 | } | |
4493 | ||
ac4d8ff2 N |
4494 | /* initialization to perform when the nfsd service is started: */ |
4495 | ||
29ab23cc | 4496 | static int |
ac4d8ff2 N |
4497 | __nfs4_state_start(void) |
4498 | { | |
b5a1a81e BF |
4499 | int ret; |
4500 | ||
1da177e4 | 4501 | boot_time = get_seconds(); |
af558e33 | 4502 | locks_start_grace(&nfsd4_manager); |
9a8db97e | 4503 | printk(KERN_INFO "NFSD: starting %ld-second grace period\n", |
e46b498c | 4504 | nfsd4_grace); |
b5a1a81e BF |
4505 | ret = set_callback_cred(); |
4506 | if (ret) | |
4507 | return -ENOMEM; | |
58da282b | 4508 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
29ab23cc BF |
4509 | if (laundry_wq == NULL) |
4510 | return -ENOMEM; | |
b5a1a81e BF |
4511 | ret = nfsd4_create_callback_queue(); |
4512 | if (ret) | |
4513 | goto out_free_laundry; | |
e46b498c | 4514 | queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); |
c2f1a551 | 4515 | set_max_delegations(); |
b5a1a81e BF |
4516 | return 0; |
4517 | out_free_laundry: | |
4518 | destroy_workqueue(laundry_wq); | |
4519 | return ret; | |
1da177e4 LT |
4520 | } |
4521 | ||
29ab23cc | 4522 | int |
76a3550e | 4523 | nfs4_state_start(void) |
1da177e4 | 4524 | { |
190e4fbf | 4525 | nfsd4_load_reboot_recovery_data(); |
4ad9a344 | 4526 | return __nfs4_state_start(); |
1da177e4 LT |
4527 | } |
4528 | ||
1da177e4 LT |
4529 | static void |
4530 | __nfs4_state_shutdown(void) | |
4531 | { | |
4532 | int i; | |
4533 | struct nfs4_client *clp = NULL; | |
4534 | struct nfs4_delegation *dp = NULL; | |
1da177e4 LT |
4535 | struct list_head *pos, *next, reaplist; |
4536 | ||
1da177e4 LT |
4537 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4538 | while (!list_empty(&conf_id_hashtbl[i])) { | |
4539 | clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
4540 | expire_client(clp); | |
4541 | } | |
4542 | while (!list_empty(&unconf_str_hashtbl[i])) { | |
4543 | clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); | |
4544 | expire_client(clp); | |
4545 | } | |
4546 | } | |
4547 | INIT_LIST_HEAD(&reaplist); | |
4548 | spin_lock(&recall_lock); | |
4549 | list_for_each_safe(pos, next, &del_recall_lru) { | |
4550 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4551 | list_move(&dp->dl_recall_lru, &reaplist); | |
4552 | } | |
4553 | spin_unlock(&recall_lock); | |
4554 | list_for_each_safe(pos, next, &reaplist) { | |
4555 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4556 | list_del_init(&dp->dl_recall_lru); | |
4557 | unhash_delegation(dp); | |
4558 | } | |
4559 | ||
190e4fbf | 4560 | nfsd4_shutdown_recdir(); |
1da177e4 LT |
4561 | } |
4562 | ||
4563 | void | |
4564 | nfs4_state_shutdown(void) | |
4565 | { | |
afe2c511 | 4566 | cancel_delayed_work_sync(&laundromat_work); |
5e8d5c29 | 4567 | destroy_workqueue(laundry_wq); |
2c5e7615 | 4568 | locks_end_grace(&nfsd4_manager); |
1da177e4 LT |
4569 | nfs4_lock_state(); |
4570 | nfs4_release_reclaim(); | |
4571 | __nfs4_state_shutdown(); | |
1da177e4 | 4572 | nfs4_unlock_state(); |
c3935e30 | 4573 | nfsd4_destroy_callback_queue(); |
1da177e4 | 4574 | } |