Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (c) 2001 The Regents of the University of Michigan. |
3 | * All rights reserved. | |
4 | * | |
5 | * Kendrick Smith <kmsmith@umich.edu> | |
6 | * Andy Adamson <kandros@umich.edu> | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * | |
12 | * 1. Redistributions of source code must retain the above copyright | |
13 | * notice, this list of conditions and the following disclaimer. | |
14 | * 2. Redistributions in binary form must reproduce the above copyright | |
15 | * notice, this list of conditions and the following disclaimer in the | |
16 | * documentation and/or other materials provided with the distribution. | |
17 | * 3. Neither the name of the University nor the names of its | |
18 | * contributors may be used to endorse or promote products derived | |
19 | * from this software without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
22 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
23 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
24 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
26 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
27 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
28 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
29 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
30 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
31 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
32 | * | |
33 | */ | |
34 | ||
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 | ||
1da177e4 | 221 | static struct nfs4_delegation * |
dcef0413 | 222 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_ol_stateid *stp, struct svc_fh *current_fh, u32 type) |
1da177e4 LT |
223 | { |
224 | struct nfs4_delegation *dp; | |
225 | struct nfs4_file *fp = stp->st_file; | |
1da177e4 LT |
226 | |
227 | dprintk("NFSD alloc_init_deleg\n"); | |
c3e48080 BF |
228 | /* |
229 | * Major work on the lease subsystem (for example, to support | |
230 | * calbacks on stat) will be required before we can support | |
231 | * write delegations properly. | |
232 | */ | |
233 | if (type != NFS4_OPEN_DELEGATE_READ) | |
234 | return NULL; | |
47f9940c MS |
235 | if (fp->fi_had_conflict) |
236 | return NULL; | |
c2f1a551 | 237 | if (num_delegations > max_delegations) |
ef0f3390 | 238 | return NULL; |
5b2d21c1 N |
239 | dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); |
240 | if (dp == NULL) | |
1da177e4 | 241 | return dp; |
ef0f3390 | 242 | num_delegations++; |
ea1da636 N |
243 | INIT_LIST_HEAD(&dp->dl_perfile); |
244 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 LT |
245 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
246 | dp->dl_client = clp; | |
13cd2184 | 247 | get_nfs4_file(fp); |
1da177e4 | 248 | dp->dl_file = fp; |
1da177e4 | 249 | dp->dl_type = type; |
e4e83ea4 | 250 | dp->dl_stateid.si_boot = boot_time; |
1da177e4 LT |
251 | dp->dl_stateid.si_stateownerid = current_delegid++; |
252 | dp->dl_stateid.si_fileid = 0; | |
73997dc4 | 253 | dp->dl_stateid.si_generation = 1; |
6c02eaa1 | 254 | fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); |
1da177e4 LT |
255 | dp->dl_time = 0; |
256 | atomic_set(&dp->dl_count, 1); | |
b5a1a81e | 257 | INIT_WORK(&dp->dl_recall.cb_work, nfsd4_do_callback_rpc); |
1da177e4 LT |
258 | return dp; |
259 | } | |
260 | ||
261 | void | |
262 | nfs4_put_delegation(struct nfs4_delegation *dp) | |
263 | { | |
264 | if (atomic_dec_and_test(&dp->dl_count)) { | |
265 | dprintk("NFSD: freeing dp %p\n",dp); | |
13cd2184 | 266 | put_nfs4_file(dp->dl_file); |
5b2d21c1 | 267 | kmem_cache_free(deleg_slab, dp); |
ef0f3390 | 268 | num_delegations--; |
1da177e4 LT |
269 | } |
270 | } | |
271 | ||
acfdf5c3 | 272 | static void nfs4_put_deleg_lease(struct nfs4_file *fp) |
1da177e4 | 273 | { |
acfdf5c3 BF |
274 | if (atomic_dec_and_test(&fp->fi_delegees)) { |
275 | vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); | |
276 | fp->fi_lease = NULL; | |
4ee63624 | 277 | fput(fp->fi_deleg_file); |
acfdf5c3 BF |
278 | fp->fi_deleg_file = NULL; |
279 | } | |
1da177e4 LT |
280 | } |
281 | ||
282 | /* Called under the state lock. */ | |
283 | static void | |
284 | unhash_delegation(struct nfs4_delegation *dp) | |
285 | { | |
ea1da636 | 286 | list_del_init(&dp->dl_perclnt); |
1da177e4 | 287 | spin_lock(&recall_lock); |
5d926e8c | 288 | list_del_init(&dp->dl_perfile); |
1da177e4 LT |
289 | list_del_init(&dp->dl_recall_lru); |
290 | spin_unlock(&recall_lock); | |
acfdf5c3 | 291 | nfs4_put_deleg_lease(dp->dl_file); |
1da177e4 LT |
292 | nfs4_put_delegation(dp); |
293 | } | |
294 | ||
295 | /* | |
296 | * SETCLIENTID state | |
297 | */ | |
298 | ||
36acb66b | 299 | /* client_lock protects the client lru list and session hash table */ |
9089f1b4 BH |
300 | static DEFINE_SPINLOCK(client_lock); |
301 | ||
1da177e4 LT |
302 | /* Hash tables for nfs4_clientid state */ |
303 | #define CLIENT_HASH_BITS 4 | |
304 | #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) | |
305 | #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) | |
306 | ||
ddc04c41 BF |
307 | static unsigned int clientid_hashval(u32 id) |
308 | { | |
309 | return id & CLIENT_HASH_MASK; | |
310 | } | |
311 | ||
312 | static unsigned int clientstr_hashval(const char *name) | |
313 | { | |
314 | return opaque_hashval(name, 8) & CLIENT_HASH_MASK; | |
315 | } | |
316 | ||
1da177e4 LT |
317 | /* |
318 | * reclaim_str_hashtbl[] holds known client info from previous reset/reboot | |
319 | * used in reboot/reset lease grace period processing | |
320 | * | |
321 | * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed | |
322 | * setclientid_confirmed info. | |
323 | * | |
324 | * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed | |
325 | * setclientid info. | |
326 | * | |
327 | * client_lru holds client queue ordered by nfs4_client.cl_time | |
328 | * for lease renewal. | |
329 | * | |
330 | * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time | |
331 | * for last close replay. | |
332 | */ | |
333 | static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; | |
334 | static int reclaim_str_hashtbl_size = 0; | |
335 | static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; | |
336 | static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; | |
337 | static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; | |
338 | static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; | |
339 | static struct list_head client_lru; | |
340 | static struct list_head close_lru; | |
341 | ||
f9d7562f BF |
342 | /* |
343 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
344 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
345 | * only what share bits are currently in force, but also what | |
346 | * combinations of share bits previous opens have used. This allows us | |
347 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
348 | * return an error if the client attempt to downgrade to a combination | |
349 | * of share bits not explicable by closing some of its previous opens. | |
350 | * | |
351 | * XXX: This enforcement is actually incomplete, since we don't keep | |
352 | * track of access/deny bit combinations; so, e.g., we allow: | |
353 | * | |
354 | * OPEN allow read, deny write | |
355 | * OPEN allow both, deny none | |
356 | * DOWNGRADE allow read, deny none | |
357 | * | |
358 | * which we should reject. | |
359 | */ | |
360 | static void | |
361 | set_access(unsigned int *access, unsigned long bmap) { | |
362 | int i; | |
363 | ||
364 | *access = 0; | |
365 | for (i = 1; i < 4; i++) { | |
366 | if (test_bit(i, &bmap)) | |
367 | *access |= i; | |
368 | } | |
369 | } | |
370 | ||
371 | static void | |
372 | set_deny(unsigned int *deny, unsigned long bmap) { | |
373 | int i; | |
374 | ||
375 | *deny = 0; | |
376 | for (i = 0; i < 4; i++) { | |
377 | if (test_bit(i, &bmap)) | |
378 | *deny |= i ; | |
379 | } | |
380 | } | |
381 | ||
382 | static int | |
dcef0413 | 383 | test_share(struct nfs4_ol_stateid *stp, struct nfsd4_open *open) { |
f9d7562f BF |
384 | unsigned int access, deny; |
385 | ||
386 | set_access(&access, stp->st_access_bmap); | |
387 | set_deny(&deny, stp->st_deny_bmap); | |
388 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) | |
389 | return 0; | |
390 | return 1; | |
391 | } | |
392 | ||
393 | static int nfs4_access_to_omode(u32 access) | |
394 | { | |
8f34a430 | 395 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
396 | case NFS4_SHARE_ACCESS_READ: |
397 | return O_RDONLY; | |
398 | case NFS4_SHARE_ACCESS_WRITE: | |
399 | return O_WRONLY; | |
400 | case NFS4_SHARE_ACCESS_BOTH: | |
401 | return O_RDWR; | |
402 | } | |
403 | BUG(); | |
404 | } | |
405 | ||
dcef0413 | 406 | static void unhash_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 407 | { |
dcef0413 | 408 | list_del(&stp->st_stid.sc_hash); |
529d7b2a BF |
409 | list_del(&stp->st_perfile); |
410 | list_del(&stp->st_perstateowner); | |
411 | } | |
412 | ||
dcef0413 | 413 | static void close_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 414 | { |
499f3edc | 415 | int i; |
0997b173 | 416 | |
23fcf2ec | 417 | if (stp->st_access_bmap) { |
499f3edc BF |
418 | for (i = 1; i < 4; i++) { |
419 | if (test_bit(i, &stp->st_access_bmap)) | |
420 | nfs4_file_put_access(stp->st_file, | |
421 | nfs4_access_to_omode(i)); | |
4665e2ba | 422 | __clear_bit(i, &stp->st_access_bmap); |
499f3edc | 423 | } |
23fcf2ec | 424 | } |
a96e5b90 | 425 | put_nfs4_file(stp->st_file); |
4665e2ba BF |
426 | stp->st_file = NULL; |
427 | } | |
428 | ||
dcef0413 | 429 | static void free_generic_stateid(struct nfs4_ol_stateid *stp) |
4665e2ba BF |
430 | { |
431 | close_generic_stateid(stp); | |
529d7b2a BF |
432 | kmem_cache_free(stateid_slab, stp); |
433 | } | |
434 | ||
dcef0413 | 435 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a BF |
436 | { |
437 | struct file *file; | |
438 | ||
439 | unhash_generic_stateid(stp); | |
440 | file = find_any_file(stp->st_file); | |
441 | if (file) | |
fe0750e5 | 442 | locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner)); |
529d7b2a BF |
443 | free_generic_stateid(stp); |
444 | } | |
445 | ||
fe0750e5 | 446 | static void unhash_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 447 | { |
dcef0413 | 448 | struct nfs4_ol_stateid *stp; |
529d7b2a | 449 | |
fe0750e5 BF |
450 | list_del(&lo->lo_owner.so_idhash); |
451 | list_del(&lo->lo_owner.so_strhash); | |
452 | list_del(&lo->lo_perstateid); | |
453 | while (!list_empty(&lo->lo_owner.so_stateids)) { | |
454 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
dcef0413 | 455 | struct nfs4_ol_stateid, st_perstateowner); |
529d7b2a BF |
456 | release_lock_stateid(stp); |
457 | } | |
458 | } | |
459 | ||
fe0750e5 | 460 | static void release_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 461 | { |
fe0750e5 BF |
462 | unhash_lockowner(lo); |
463 | nfs4_free_lockowner(lo); | |
529d7b2a BF |
464 | } |
465 | ||
466 | static void | |
dcef0413 | 467 | release_stateid_lockowners(struct nfs4_ol_stateid *open_stp) |
529d7b2a | 468 | { |
fe0750e5 | 469 | struct nfs4_lockowner *lo; |
529d7b2a BF |
470 | |
471 | while (!list_empty(&open_stp->st_lockowners)) { | |
fe0750e5 BF |
472 | lo = list_entry(open_stp->st_lockowners.next, |
473 | struct nfs4_lockowner, lo_perstateid); | |
474 | release_lockowner(lo); | |
529d7b2a BF |
475 | } |
476 | } | |
477 | ||
dcef0413 | 478 | static void release_open_stateid(struct nfs4_ol_stateid *stp) |
2283963f BF |
479 | { |
480 | unhash_generic_stateid(stp); | |
481 | release_stateid_lockowners(stp); | |
2283963f BF |
482 | free_generic_stateid(stp); |
483 | } | |
484 | ||
fe0750e5 | 485 | static void unhash_openowner(struct nfs4_openowner *oo) |
f1d110ca | 486 | { |
dcef0413 | 487 | struct nfs4_ol_stateid *stp; |
f1d110ca | 488 | |
fe0750e5 BF |
489 | list_del(&oo->oo_owner.so_idhash); |
490 | list_del(&oo->oo_owner.so_strhash); | |
491 | list_del(&oo->oo_perclient); | |
492 | while (!list_empty(&oo->oo_owner.so_stateids)) { | |
493 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
dcef0413 | 494 | struct nfs4_ol_stateid, st_perstateowner); |
f044ff83 | 495 | release_open_stateid(stp); |
f1d110ca BF |
496 | } |
497 | } | |
498 | ||
fe0750e5 | 499 | static void release_openowner(struct nfs4_openowner *oo) |
f1d110ca | 500 | { |
fe0750e5 BF |
501 | unhash_openowner(oo); |
502 | list_del(&oo->oo_close_lru); | |
503 | nfs4_free_openowner(oo); | |
f1d110ca BF |
504 | } |
505 | ||
5282fd72 ME |
506 | #define SESSION_HASH_SIZE 512 |
507 | static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; | |
508 | ||
509 | static inline int | |
510 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
511 | { | |
512 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
513 | ||
514 | return sid->sequence % SESSION_HASH_SIZE; | |
515 | } | |
516 | ||
517 | static inline void | |
518 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
519 | { | |
520 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
521 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
522 | } | |
523 | ||
ec6b5d7b AA |
524 | static void |
525 | gen_sessionid(struct nfsd4_session *ses) | |
526 | { | |
527 | struct nfs4_client *clp = ses->se_client; | |
528 | struct nfsd4_sessionid *sid; | |
529 | ||
530 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
531 | sid->clientid = clp->cl_clientid; | |
532 | sid->sequence = current_sessionid++; | |
533 | sid->reserved = 0; | |
534 | } | |
535 | ||
536 | /* | |
a649637c AA |
537 | * The protocol defines ca_maxresponssize_cached to include the size of |
538 | * the rpc header, but all we need to cache is the data starting after | |
539 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
540 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
541 | * value that is the number of bytes in our cache plus a few additional | |
542 | * bytes. In order to stay on the safe side, and not promise more than | |
543 | * we can cache, those additional bytes must be the minimum possible: 24 | |
544 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
545 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
546 | * for the SEQUENCE op response: | |
547 | */ | |
548 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
549 | ||
557ce264 AA |
550 | static void |
551 | free_session_slots(struct nfsd4_session *ses) | |
552 | { | |
553 | int i; | |
554 | ||
555 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
556 | kfree(ses->se_slots[i]); | |
557 | } | |
558 | ||
a649637c | 559 | /* |
efe0cb6d BF |
560 | * We don't actually need to cache the rpc and session headers, so we |
561 | * can allocate a little less for each slot: | |
562 | */ | |
563 | static inline int slot_bytes(struct nfsd4_channel_attrs *ca) | |
564 | { | |
565 | return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
566 | } | |
567 | ||
5b6feee9 | 568 | static int nfsd4_sanitize_slot_size(u32 size) |
ec6b5d7b | 569 | { |
5b6feee9 BF |
570 | size -= NFSD_MIN_HDR_SEQ_SZ; /* We don't cache the rpc header */ |
571 | size = min_t(u32, size, NFSD_SLOT_CACHE_SIZE); | |
ec6b5d7b | 572 | |
5b6feee9 BF |
573 | return size; |
574 | } | |
ec6b5d7b | 575 | |
5b6feee9 BF |
576 | /* |
577 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c AA |
578 | * re-negotiate active sessions and reduce their slot usage to make |
579 | * rooom for new connections. For now we just fail the create session. | |
ec6b5d7b | 580 | */ |
5b6feee9 | 581 | static int nfsd4_get_drc_mem(int slotsize, u32 num) |
ec6b5d7b | 582 | { |
5b6feee9 | 583 | int avail; |
ec6b5d7b | 584 | |
5b6feee9 | 585 | num = min_t(u32, num, NFSD_MAX_SLOTS_PER_SESSION); |
5d77ddfb | 586 | |
5b6feee9 BF |
587 | spin_lock(&nfsd_drc_lock); |
588 | avail = min_t(int, NFSD_MAX_MEM_PER_SESSION, | |
589 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
590 | num = min_t(int, num, avail / slotsize); | |
591 | nfsd_drc_mem_used += num * slotsize; | |
592 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 593 | |
5b6feee9 BF |
594 | return num; |
595 | } | |
ec6b5d7b | 596 | |
5b6feee9 BF |
597 | static void nfsd4_put_drc_mem(int slotsize, int num) |
598 | { | |
4bd9b0f4 | 599 | spin_lock(&nfsd_drc_lock); |
5b6feee9 | 600 | nfsd_drc_mem_used -= slotsize * num; |
4bd9b0f4 | 601 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 602 | } |
ec6b5d7b | 603 | |
5b6feee9 BF |
604 | static struct nfsd4_session *alloc_session(int slotsize, int numslots) |
605 | { | |
606 | struct nfsd4_session *new; | |
607 | int mem, i; | |
a649637c | 608 | |
5b6feee9 BF |
609 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
610 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
611 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 612 | |
5b6feee9 BF |
613 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
614 | if (!new) | |
615 | return NULL; | |
557ce264 | 616 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 BF |
617 | for (i = 0; i < numslots; i++) { |
618 | mem = sizeof(struct nfsd4_slot) + slotsize; | |
619 | new->se_slots[i] = kzalloc(mem, GFP_KERNEL); | |
620 | if (!new->se_slots[i]) | |
557ce264 | 621 | goto out_free; |
557ce264 | 622 | } |
5b6feee9 BF |
623 | return new; |
624 | out_free: | |
625 | while (i--) | |
626 | kfree(new->se_slots[i]); | |
627 | kfree(new); | |
628 | return NULL; | |
ec6b5d7b AA |
629 | } |
630 | ||
5b6feee9 | 631 | static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, struct nfsd4_channel_attrs *req, int numslots, int slotsize) |
ec6b5d7b | 632 | { |
5b6feee9 | 633 | u32 maxrpc = nfsd_serv->sv_max_mesg; |
ec6b5d7b | 634 | |
5b6feee9 | 635 | new->maxreqs = numslots; |
d2b21743 MJ |
636 | new->maxresp_cached = min_t(u32, req->maxresp_cached, |
637 | slotsize + NFSD_MIN_HDR_SEQ_SZ); | |
5b6feee9 BF |
638 | new->maxreq_sz = min_t(u32, req->maxreq_sz, maxrpc); |
639 | new->maxresp_sz = min_t(u32, req->maxresp_sz, maxrpc); | |
640 | new->maxops = min_t(u32, req->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
641 | } | |
ec6b5d7b | 642 | |
19cf5c02 BF |
643 | static void free_conn(struct nfsd4_conn *c) |
644 | { | |
645 | svc_xprt_put(c->cn_xprt); | |
646 | kfree(c); | |
647 | } | |
ec6b5d7b | 648 | |
19cf5c02 BF |
649 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
650 | { | |
651 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
652 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 653 | |
19cf5c02 BF |
654 | spin_lock(&clp->cl_lock); |
655 | if (!list_empty(&c->cn_persession)) { | |
656 | list_del(&c->cn_persession); | |
657 | free_conn(c); | |
658 | } | |
659 | spin_unlock(&clp->cl_lock); | |
eea49806 | 660 | nfsd4_probe_callback(clp); |
19cf5c02 | 661 | } |
ec6b5d7b | 662 | |
d29c374c | 663 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 664 | { |
c7662518 | 665 | struct nfsd4_conn *conn; |
ec6b5d7b | 666 | |
c7662518 BF |
667 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
668 | if (!conn) | |
db90681d | 669 | return NULL; |
c7662518 BF |
670 | svc_xprt_get(rqstp->rq_xprt); |
671 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 672 | conn->cn_flags = flags; |
db90681d BF |
673 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
674 | return conn; | |
675 | } | |
a649637c | 676 | |
328ead28 BF |
677 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
678 | { | |
679 | conn->cn_session = ses; | |
680 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
681 | } |
682 | ||
db90681d | 683 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 684 | { |
db90681d | 685 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 686 | |
c7662518 | 687 | spin_lock(&clp->cl_lock); |
328ead28 | 688 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 689 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
690 | } |
691 | ||
21b75b01 | 692 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 693 | { |
19cf5c02 | 694 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 695 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
696 | } |
697 | ||
1d1bc8f2 | 698 | static __be32 nfsd4_new_conn(struct svc_rqst *rqstp, struct nfsd4_session *ses, u32 dir) |
ec6b5d7b | 699 | { |
db90681d | 700 | struct nfsd4_conn *conn; |
21b75b01 | 701 | int ret; |
ec6b5d7b | 702 | |
1d1bc8f2 | 703 | conn = alloc_conn(rqstp, dir); |
db90681d BF |
704 | if (!conn) |
705 | return nfserr_jukebox; | |
706 | nfsd4_hash_conn(conn, ses); | |
21b75b01 BF |
707 | ret = nfsd4_register_conn(conn); |
708 | if (ret) | |
709 | /* oops; xprt is already down: */ | |
710 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
c7662518 BF |
711 | return nfs_ok; |
712 | } | |
ec6b5d7b | 713 | |
1d1bc8f2 BF |
714 | static __be32 nfsd4_new_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_session *ses) |
715 | { | |
716 | u32 dir = NFS4_CDFC4_FORE; | |
717 | ||
718 | if (ses->se_flags & SESSION4_BACK_CHAN) | |
719 | dir |= NFS4_CDFC4_BACK; | |
720 | ||
721 | return nfsd4_new_conn(rqstp, ses, dir); | |
722 | } | |
723 | ||
724 | /* must be called under client_lock */ | |
19cf5c02 | 725 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 726 | { |
19cf5c02 BF |
727 | struct nfs4_client *clp = s->se_client; |
728 | struct nfsd4_conn *c; | |
ec6b5d7b | 729 | |
19cf5c02 BF |
730 | spin_lock(&clp->cl_lock); |
731 | while (!list_empty(&s->se_conns)) { | |
732 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
733 | list_del_init(&c->cn_persession); | |
734 | spin_unlock(&clp->cl_lock); | |
557ce264 | 735 | |
19cf5c02 BF |
736 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
737 | free_conn(c); | |
ec6b5d7b | 738 | |
19cf5c02 BF |
739 | spin_lock(&clp->cl_lock); |
740 | } | |
741 | spin_unlock(&clp->cl_lock); | |
c7662518 | 742 | } |
ec6b5d7b | 743 | |
c7662518 BF |
744 | void free_session(struct kref *kref) |
745 | { | |
746 | struct nfsd4_session *ses; | |
747 | int mem; | |
748 | ||
749 | ses = container_of(kref, struct nfsd4_session, se_ref); | |
19cf5c02 | 750 | nfsd4_del_conns(ses); |
c7662518 BF |
751 | spin_lock(&nfsd_drc_lock); |
752 | mem = ses->se_fchannel.maxreqs * slot_bytes(&ses->se_fchannel); | |
753 | nfsd_drc_mem_used -= mem; | |
754 | spin_unlock(&nfsd_drc_lock); | |
755 | free_session_slots(ses); | |
756 | kfree(ses); | |
757 | } | |
758 | ||
ac7c46f2 | 759 | static struct nfsd4_session *alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
5b6feee9 BF |
760 | { |
761 | struct nfsd4_session *new; | |
762 | struct nfsd4_channel_attrs *fchan = &cses->fore_channel; | |
763 | int numslots, slotsize; | |
c7662518 | 764 | int status; |
5b6feee9 BF |
765 | int idx; |
766 | ||
767 | /* | |
768 | * Note decreasing slot size below client's request may | |
769 | * make it difficult for client to function correctly, whereas | |
770 | * decreasing the number of slots will (just?) affect | |
771 | * performance. When short on memory we therefore prefer to | |
772 | * decrease number of slots instead of their size. | |
773 | */ | |
774 | slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached); | |
775 | numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs); | |
ced6dfe9 MJ |
776 | if (numslots < 1) |
777 | return NULL; | |
5b6feee9 BF |
778 | |
779 | new = alloc_session(slotsize, numslots); | |
780 | if (!new) { | |
781 | nfsd4_put_drc_mem(slotsize, fchan->maxreqs); | |
ac7c46f2 | 782 | return NULL; |
557ce264 | 783 | } |
5b6feee9 | 784 | init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize); |
557ce264 | 785 | |
ec6b5d7b AA |
786 | new->se_client = clp; |
787 | gen_sessionid(new); | |
ec6b5d7b | 788 | |
c7662518 BF |
789 | INIT_LIST_HEAD(&new->se_conns); |
790 | ||
ac7c46f2 | 791 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 792 | new->se_flags = cses->flags; |
8b5ce5cd | 793 | new->se_cb_prog = cses->callback_prog; |
ec6b5d7b | 794 | kref_init(&new->se_ref); |
5b6feee9 | 795 | idx = hash_sessionid(&new->se_sessionid); |
9089f1b4 | 796 | spin_lock(&client_lock); |
ec6b5d7b | 797 | list_add(&new->se_hash, &sessionid_hashtbl[idx]); |
4c649378 | 798 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 799 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 800 | spin_unlock(&clp->cl_lock); |
9089f1b4 | 801 | spin_unlock(&client_lock); |
ec6b5d7b | 802 | |
1d1bc8f2 | 803 | status = nfsd4_new_conn_from_crses(rqstp, new); |
ac7c46f2 | 804 | /* whoops: benny points out, status is ignored! (err, or bogus) */ |
c7662518 BF |
805 | if (status) { |
806 | free_session(&new->se_ref); | |
ac7c46f2 | 807 | return NULL; |
c7662518 | 808 | } |
dcbeaa68 | 809 | if (cses->flags & SESSION4_BACK_CHAN) { |
edd76786 | 810 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
811 | /* |
812 | * This is a little silly; with sessions there's no real | |
813 | * use for the callback address. Use the peer address | |
814 | * as a reasonable default for now, but consider fixing | |
815 | * the rpc client not to require an address in the | |
816 | * future: | |
817 | */ | |
edd76786 BF |
818 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
819 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 820 | } |
dcbeaa68 | 821 | nfsd4_probe_callback(clp); |
ac7c46f2 | 822 | return new; |
ec6b5d7b AA |
823 | } |
824 | ||
9089f1b4 | 825 | /* caller must hold client_lock */ |
5282fd72 ME |
826 | static struct nfsd4_session * |
827 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) | |
828 | { | |
829 | struct nfsd4_session *elem; | |
830 | int idx; | |
831 | ||
832 | dump_sessionid(__func__, sessionid); | |
833 | idx = hash_sessionid(sessionid); | |
5282fd72 ME |
834 | /* Search in the appropriate list */ |
835 | list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { | |
5282fd72 ME |
836 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
837 | NFS4_MAX_SESSIONID_LEN)) { | |
838 | return elem; | |
839 | } | |
840 | } | |
841 | ||
842 | dprintk("%s: session not found\n", __func__); | |
843 | return NULL; | |
844 | } | |
845 | ||
9089f1b4 | 846 | /* caller must hold client_lock */ |
7116ed6b | 847 | static void |
5282fd72 | 848 | unhash_session(struct nfsd4_session *ses) |
7116ed6b AA |
849 | { |
850 | list_del(&ses->se_hash); | |
4c649378 | 851 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 852 | list_del(&ses->se_perclnt); |
4c649378 | 853 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
854 | } |
855 | ||
36acb66b | 856 | /* must be called under the client_lock */ |
1da177e4 | 857 | static inline void |
36acb66b | 858 | renew_client_locked(struct nfs4_client *clp) |
1da177e4 | 859 | { |
07cd4909 BH |
860 | if (is_client_expired(clp)) { |
861 | dprintk("%s: client (clientid %08x/%08x) already expired\n", | |
862 | __func__, | |
863 | clp->cl_clientid.cl_boot, | |
864 | clp->cl_clientid.cl_id); | |
865 | return; | |
866 | } | |
867 | ||
1da177e4 LT |
868 | /* |
869 | * Move client to the end to the LRU list. | |
870 | */ | |
871 | dprintk("renewing client (clientid %08x/%08x)\n", | |
872 | clp->cl_clientid.cl_boot, | |
873 | clp->cl_clientid.cl_id); | |
874 | list_move_tail(&clp->cl_lru, &client_lru); | |
875 | clp->cl_time = get_seconds(); | |
876 | } | |
877 | ||
36acb66b BH |
878 | static inline void |
879 | renew_client(struct nfs4_client *clp) | |
880 | { | |
881 | spin_lock(&client_lock); | |
882 | renew_client_locked(clp); | |
883 | spin_unlock(&client_lock); | |
884 | } | |
885 | ||
1da177e4 LT |
886 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
887 | static int | |
888 | STALE_CLIENTID(clientid_t *clid) | |
889 | { | |
890 | if (clid->cl_boot == boot_time) | |
891 | return 0; | |
60adfc50 AA |
892 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
893 | clid->cl_boot, clid->cl_id, boot_time); | |
1da177e4 LT |
894 | return 1; |
895 | } | |
896 | ||
897 | /* | |
898 | * XXX Should we use a slab cache ? | |
899 | * This type of memory management is somewhat inefficient, but we use it | |
900 | * anyway since SETCLIENTID is not a common operation. | |
901 | */ | |
35bba9a3 | 902 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
903 | { |
904 | struct nfs4_client *clp; | |
905 | ||
35bba9a3 BF |
906 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
907 | if (clp == NULL) | |
908 | return NULL; | |
909 | clp->cl_name.data = kmalloc(name.len, GFP_KERNEL); | |
910 | if (clp->cl_name.data == NULL) { | |
911 | kfree(clp); | |
912 | return NULL; | |
1da177e4 | 913 | } |
35bba9a3 BF |
914 | memcpy(clp->cl_name.data, name.data, name.len); |
915 | clp->cl_name.len = name.len; | |
1da177e4 LT |
916 | return clp; |
917 | } | |
918 | ||
919 | static inline void | |
920 | free_client(struct nfs4_client *clp) | |
921 | { | |
792c95dd BF |
922 | while (!list_empty(&clp->cl_sessions)) { |
923 | struct nfsd4_session *ses; | |
924 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
925 | se_perclnt); | |
926 | list_del(&ses->se_perclnt); | |
927 | nfsd4_put_session(ses); | |
928 | } | |
1da177e4 LT |
929 | if (clp->cl_cred.cr_group_info) |
930 | put_group_info(clp->cl_cred.cr_group_info); | |
68e76ad0 | 931 | kfree(clp->cl_principal); |
1da177e4 LT |
932 | kfree(clp->cl_name.data); |
933 | kfree(clp); | |
934 | } | |
935 | ||
d7682988 BH |
936 | void |
937 | release_session_client(struct nfsd4_session *session) | |
938 | { | |
939 | struct nfs4_client *clp = session->se_client; | |
940 | ||
941 | if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock)) | |
942 | return; | |
943 | if (is_client_expired(clp)) { | |
944 | free_client(clp); | |
945 | session->se_client = NULL; | |
946 | } else | |
947 | renew_client_locked(clp); | |
948 | spin_unlock(&client_lock); | |
d7682988 BH |
949 | } |
950 | ||
84d38ac9 BH |
951 | /* must be called under the client_lock */ |
952 | static inline void | |
953 | unhash_client_locked(struct nfs4_client *clp) | |
954 | { | |
792c95dd BF |
955 | struct nfsd4_session *ses; |
956 | ||
07cd4909 | 957 | mark_client_expired(clp); |
84d38ac9 | 958 | list_del(&clp->cl_lru); |
4c649378 | 959 | spin_lock(&clp->cl_lock); |
792c95dd BF |
960 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
961 | list_del_init(&ses->se_hash); | |
4c649378 | 962 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
963 | } |
964 | ||
1da177e4 LT |
965 | static void |
966 | expire_client(struct nfs4_client *clp) | |
967 | { | |
fe0750e5 | 968 | struct nfs4_openowner *oo; |
1da177e4 | 969 | struct nfs4_delegation *dp; |
1da177e4 LT |
970 | struct list_head reaplist; |
971 | ||
1da177e4 LT |
972 | INIT_LIST_HEAD(&reaplist); |
973 | spin_lock(&recall_lock); | |
ea1da636 N |
974 | while (!list_empty(&clp->cl_delegations)) { |
975 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
ea1da636 | 976 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
977 | list_move(&dp->dl_recall_lru, &reaplist); |
978 | } | |
979 | spin_unlock(&recall_lock); | |
980 | while (!list_empty(&reaplist)) { | |
981 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
982 | list_del_init(&dp->dl_recall_lru); | |
983 | unhash_delegation(dp); | |
984 | } | |
ea1da636 | 985 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 BF |
986 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
987 | release_openowner(oo); | |
1da177e4 | 988 | } |
6ff8da08 | 989 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
990 | if (clp->cl_cb_conn.cb_xprt) |
991 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
36acb66b BH |
992 | list_del(&clp->cl_idhash); |
993 | list_del(&clp->cl_strhash); | |
be1fdf6c | 994 | spin_lock(&client_lock); |
84d38ac9 | 995 | unhash_client_locked(clp); |
46583e25 BH |
996 | if (atomic_read(&clp->cl_refcount) == 0) |
997 | free_client(clp); | |
be1fdf6c | 998 | spin_unlock(&client_lock); |
1da177e4 LT |
999 | } |
1000 | ||
35bba9a3 BF |
1001 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
1002 | { | |
1003 | memcpy(target->cl_verifier.data, source->data, | |
1004 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
1005 | } |
1006 | ||
35bba9a3 BF |
1007 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
1008 | { | |
1da177e4 LT |
1009 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
1010 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
1011 | } | |
1012 | ||
35bba9a3 BF |
1013 | static void copy_cred(struct svc_cred *target, struct svc_cred *source) |
1014 | { | |
1da177e4 LT |
1015 | target->cr_uid = source->cr_uid; |
1016 | target->cr_gid = source->cr_gid; | |
1017 | target->cr_group_info = source->cr_group_info; | |
1018 | get_group_info(target->cr_group_info); | |
1019 | } | |
1020 | ||
35bba9a3 | 1021 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 1022 | { |
a55370a3 | 1023 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
1024 | } |
1025 | ||
1026 | static int | |
599e0a22 BF |
1027 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1028 | { | |
1029 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
1030 | } |
1031 | ||
1032 | static int | |
599e0a22 BF |
1033 | same_clid(clientid_t *cl1, clientid_t *cl2) |
1034 | { | |
1035 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1036 | } |
1037 | ||
1038 | /* XXX what about NGROUP */ | |
1039 | static int | |
599e0a22 BF |
1040 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
1041 | { | |
1042 | return cr1->cr_uid == cr2->cr_uid; | |
1da177e4 LT |
1043 | } |
1044 | ||
5ec7b46c BF |
1045 | static void gen_clid(struct nfs4_client *clp) |
1046 | { | |
1047 | static u32 current_clientid = 1; | |
1048 | ||
1da177e4 LT |
1049 | clp->cl_clientid.cl_boot = boot_time; |
1050 | clp->cl_clientid.cl_id = current_clientid++; | |
1051 | } | |
1052 | ||
deda2faa BF |
1053 | static void gen_confirm(struct nfs4_client *clp) |
1054 | { | |
1055 | static u32 i; | |
1056 | u32 *p; | |
1da177e4 | 1057 | |
1da177e4 | 1058 | p = (u32 *)clp->cl_confirm.data; |
deda2faa BF |
1059 | *p++ = get_seconds(); |
1060 | *p++ = i++; | |
1da177e4 LT |
1061 | } |
1062 | ||
4581d140 BF |
1063 | static int |
1064 | same_stateid(stateid_t *id_one, stateid_t *id_two) | |
1065 | { | |
1066 | if (id_one->si_stateownerid != id_two->si_stateownerid) | |
1067 | return 0; | |
1068 | return id_one->si_fileid == id_two->si_fileid; | |
1069 | } | |
1070 | ||
dcef0413 | 1071 | static struct nfs4_ol_stateid *find_stateid(stateid_t *t) |
4581d140 | 1072 | { |
dcef0413 | 1073 | struct nfs4_stid *s; |
4581d140 BF |
1074 | unsigned int hashval; |
1075 | ||
1076 | hashval = stateid_hashval(t->si_stateownerid, t->si_fileid); | |
dcef0413 BF |
1077 | list_for_each_entry(s, &stateid_hashtbl[hashval], sc_hash) |
1078 | if (same_stateid(&s->sc_stateid, t)) | |
1079 | return openlockstateid(s); | |
4d71ab87 BF |
1080 | return NULL; |
1081 | } | |
1082 | ||
dcef0413 | 1083 | static struct nfs4_ol_stateid *find_stateid_by_type(stateid_t *t, char typemask) |
4d71ab87 | 1084 | { |
dcef0413 | 1085 | struct nfs4_ol_stateid *s; |
4d71ab87 BF |
1086 | |
1087 | s = find_stateid(t); | |
1088 | if (!s) | |
1089 | return NULL; | |
dcef0413 | 1090 | if (typemask & s->st_stid.sc_type) |
4581d140 | 1091 | return s; |
4581d140 BF |
1092 | return NULL; |
1093 | } | |
1094 | ||
b09333c4 RL |
1095 | static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, |
1096 | struct svc_rqst *rqstp, nfs4_verifier *verf) | |
1097 | { | |
1098 | struct nfs4_client *clp; | |
1099 | struct sockaddr *sa = svc_addr(rqstp); | |
1100 | char *princ; | |
1101 | ||
1102 | clp = alloc_client(name); | |
1103 | if (clp == NULL) | |
1104 | return NULL; | |
1105 | ||
792c95dd BF |
1106 | INIT_LIST_HEAD(&clp->cl_sessions); |
1107 | ||
b09333c4 RL |
1108 | princ = svc_gss_principal(rqstp); |
1109 | if (princ) { | |
1110 | clp->cl_principal = kstrdup(princ, GFP_KERNEL); | |
1111 | if (clp->cl_principal == NULL) { | |
1112 | free_client(clp); | |
1113 | return NULL; | |
1114 | } | |
1115 | } | |
1116 | ||
1117 | memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); | |
46583e25 | 1118 | atomic_set(&clp->cl_refcount, 0); |
77a3569d | 1119 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; |
b09333c4 RL |
1120 | INIT_LIST_HEAD(&clp->cl_idhash); |
1121 | INIT_LIST_HEAD(&clp->cl_strhash); | |
1122 | INIT_LIST_HEAD(&clp->cl_openowners); | |
1123 | INIT_LIST_HEAD(&clp->cl_delegations); | |
b09333c4 | 1124 | INIT_LIST_HEAD(&clp->cl_lru); |
5ce8ba25 | 1125 | INIT_LIST_HEAD(&clp->cl_callbacks); |
6ff8da08 | 1126 | spin_lock_init(&clp->cl_lock); |
cee277d9 | 1127 | INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_do_callback_rpc); |
07cd4909 | 1128 | clp->cl_time = get_seconds(); |
b09333c4 RL |
1129 | clear_bit(0, &clp->cl_cb_slot_busy); |
1130 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1131 | copy_verf(clp, verf); | |
1132 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
1133 | clp->cl_flavor = rqstp->rq_flavor; | |
1134 | copy_cred(&clp->cl_cred, &rqstp->rq_cred); | |
1135 | gen_confirm(clp); | |
edd76786 | 1136 | clp->cl_cb_session = NULL; |
b09333c4 RL |
1137 | return clp; |
1138 | } | |
1139 | ||
35bba9a3 BF |
1140 | static int check_name(struct xdr_netobj name) |
1141 | { | |
1da177e4 LT |
1142 | if (name.len == 0) |
1143 | return 0; | |
1144 | if (name.len > NFS4_OPAQUE_LIMIT) { | |
2fdada03 | 1145 | dprintk("NFSD: check_name: name too long(%d)!\n", name.len); |
1da177e4 LT |
1146 | return 0; |
1147 | } | |
1148 | return 1; | |
1149 | } | |
1150 | ||
fd39ca9a | 1151 | static void |
1da177e4 LT |
1152 | add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) |
1153 | { | |
1154 | unsigned int idhashval; | |
1155 | ||
1156 | list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); | |
1157 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
1158 | list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); | |
36acb66b | 1159 | renew_client(clp); |
1da177e4 LT |
1160 | } |
1161 | ||
fd39ca9a | 1162 | static void |
1da177e4 LT |
1163 | move_to_confirmed(struct nfs4_client *clp) |
1164 | { | |
1165 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
1166 | unsigned int strhashval; | |
1167 | ||
1168 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
f116629d | 1169 | list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); |
a55370a3 | 1170 | strhashval = clientstr_hashval(clp->cl_recdir); |
328efbab | 1171 | list_move(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); |
1da177e4 LT |
1172 | renew_client(clp); |
1173 | } | |
1174 | ||
1175 | static struct nfs4_client * | |
1176 | find_confirmed_client(clientid_t *clid) | |
1177 | { | |
1178 | struct nfs4_client *clp; | |
1179 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1180 | ||
1181 | list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 1182 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
1183 | return clp; |
1184 | } | |
1185 | return NULL; | |
1186 | } | |
1187 | ||
1188 | static struct nfs4_client * | |
1189 | find_unconfirmed_client(clientid_t *clid) | |
1190 | { | |
1191 | struct nfs4_client *clp; | |
1192 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1193 | ||
1194 | list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 1195 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
1196 | return clp; |
1197 | } | |
1198 | return NULL; | |
1199 | } | |
1200 | ||
6e5f15c9 | 1201 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 1202 | { |
6e5f15c9 | 1203 | return clp->cl_exchange_flags != 0; |
e203d506 | 1204 | } |
a1bcecd2 | 1205 | |
28ce6054 | 1206 | static struct nfs4_client * |
e203d506 | 1207 | find_confirmed_client_by_str(const char *dname, unsigned int hashval) |
28ce6054 N |
1208 | { |
1209 | struct nfs4_client *clp; | |
1210 | ||
1211 | list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { | |
e203d506 | 1212 | if (same_name(clp->cl_recdir, dname)) |
28ce6054 N |
1213 | return clp; |
1214 | } | |
1215 | return NULL; | |
1216 | } | |
1217 | ||
1218 | static struct nfs4_client * | |
e203d506 | 1219 | find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) |
28ce6054 N |
1220 | { |
1221 | struct nfs4_client *clp; | |
1222 | ||
1223 | list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { | |
e203d506 | 1224 | if (same_name(clp->cl_recdir, dname)) |
28ce6054 N |
1225 | return clp; |
1226 | } | |
1227 | return NULL; | |
1228 | } | |
1229 | ||
6f3d772f TU |
1230 | static void rpc_svcaddr2sockaddr(struct sockaddr *sa, unsigned short family, union svc_addr_u *svcaddr) |
1231 | { | |
1232 | switch (family) { | |
1233 | case AF_INET: | |
1234 | ((struct sockaddr_in *)sa)->sin_family = AF_INET; | |
1235 | ((struct sockaddr_in *)sa)->sin_addr = svcaddr->addr; | |
1236 | return; | |
1237 | case AF_INET6: | |
1238 | ((struct sockaddr_in6 *)sa)->sin6_family = AF_INET6; | |
1239 | ((struct sockaddr_in6 *)sa)->sin6_addr = svcaddr->addr6; | |
1240 | return; | |
1241 | } | |
1242 | } | |
1243 | ||
fd39ca9a | 1244 | static void |
6f3d772f | 1245 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 1246 | { |
07263f1e | 1247 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
1248 | struct sockaddr *sa = svc_addr(rqstp); |
1249 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
1250 | unsigned short expected_family; |
1251 | ||
1252 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
1253 | if (se->se_callback_netid_len == 3 && | |
1254 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
1255 | expected_family = AF_INET; | |
1256 | else if (se->se_callback_netid_len == 4 && | |
1257 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
1258 | expected_family = AF_INET6; | |
1259 | else | |
1da177e4 LT |
1260 | goto out_err; |
1261 | ||
07263f1e | 1262 | conn->cb_addrlen = rpc_uaddr2sockaddr(se->se_callback_addr_val, |
aa9a4ec7 | 1263 | se->se_callback_addr_len, |
07263f1e BF |
1264 | (struct sockaddr *)&conn->cb_addr, |
1265 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 1266 | |
07263f1e | 1267 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 1268 | goto out_err; |
aa9a4ec7 | 1269 | |
07263f1e BF |
1270 | if (conn->cb_addr.ss_family == AF_INET6) |
1271 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 1272 | |
07263f1e BF |
1273 | conn->cb_prog = se->se_callback_prog; |
1274 | conn->cb_ident = se->se_callback_ident; | |
6f3d772f | 1275 | rpc_svcaddr2sockaddr((struct sockaddr *)&conn->cb_saddr, expected_family, &rqstp->rq_daddr); |
1da177e4 LT |
1276 | return; |
1277 | out_err: | |
07263f1e BF |
1278 | conn->cb_addr.ss_family = AF_UNSPEC; |
1279 | conn->cb_addrlen = 0; | |
849823c5 | 1280 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
1281 | "will not receive delegations\n", |
1282 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
1283 | ||
1da177e4 LT |
1284 | return; |
1285 | } | |
1286 | ||
074fe897 | 1287 | /* |
557ce264 | 1288 | * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. |
074fe897 | 1289 | */ |
074fe897 AA |
1290 | void |
1291 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) | |
074fe897 | 1292 | { |
557ce264 AA |
1293 | struct nfsd4_slot *slot = resp->cstate.slot; |
1294 | unsigned int base; | |
074fe897 | 1295 | |
557ce264 | 1296 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1297 | |
557ce264 AA |
1298 | slot->sl_opcnt = resp->opcnt; |
1299 | slot->sl_status = resp->cstate.status; | |
074fe897 | 1300 | |
bf864a31 | 1301 | if (nfsd4_not_cached(resp)) { |
557ce264 | 1302 | slot->sl_datalen = 0; |
bf864a31 | 1303 | return; |
074fe897 | 1304 | } |
557ce264 AA |
1305 | slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; |
1306 | base = (char *)resp->cstate.datap - | |
1307 | (char *)resp->xbuf->head[0].iov_base; | |
1308 | if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, | |
1309 | slot->sl_datalen)) | |
1310 | WARN("%s: sessions DRC could not cache compound\n", __func__); | |
1311 | return; | |
074fe897 AA |
1312 | } |
1313 | ||
1314 | /* | |
abfabf8c AA |
1315 | * Encode the replay sequence operation from the slot values. |
1316 | * If cachethis is FALSE encode the uncached rep error on the next | |
1317 | * operation which sets resp->p and increments resp->opcnt for | |
1318 | * nfs4svc_encode_compoundres. | |
074fe897 | 1319 | * |
074fe897 | 1320 | */ |
abfabf8c AA |
1321 | static __be32 |
1322 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
1323 | struct nfsd4_compoundres *resp) | |
074fe897 | 1324 | { |
abfabf8c AA |
1325 | struct nfsd4_op *op; |
1326 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 1327 | |
abfabf8c | 1328 | dprintk("--> %s resp->opcnt %d cachethis %u \n", __func__, |
557ce264 | 1329 | resp->opcnt, resp->cstate.slot->sl_cachethis); |
bf864a31 | 1330 | |
abfabf8c AA |
1331 | /* Encode the replayed sequence operation */ |
1332 | op = &args->ops[resp->opcnt - 1]; | |
1333 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 1334 | |
abfabf8c | 1335 | /* Return nfserr_retry_uncached_rep in next operation. */ |
557ce264 | 1336 | if (args->opcnt > 1 && slot->sl_cachethis == 0) { |
abfabf8c AA |
1337 | op = &args->ops[resp->opcnt++]; |
1338 | op->status = nfserr_retry_uncached_rep; | |
1339 | nfsd4_encode_operation(resp, op); | |
074fe897 | 1340 | } |
abfabf8c | 1341 | return op->status; |
074fe897 AA |
1342 | } |
1343 | ||
1344 | /* | |
557ce264 AA |
1345 | * The sequence operation is not cached because we can use the slot and |
1346 | * session values. | |
074fe897 AA |
1347 | */ |
1348 | __be32 | |
bf864a31 AA |
1349 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
1350 | struct nfsd4_sequence *seq) | |
074fe897 | 1351 | { |
557ce264 | 1352 | struct nfsd4_slot *slot = resp->cstate.slot; |
074fe897 AA |
1353 | __be32 status; |
1354 | ||
557ce264 | 1355 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1356 | |
abfabf8c AA |
1357 | /* Either returns 0 or nfserr_retry_uncached */ |
1358 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); | |
1359 | if (status == nfserr_retry_uncached_rep) | |
1360 | return status; | |
074fe897 | 1361 | |
557ce264 AA |
1362 | /* The sequence operation has been encoded, cstate->datap set. */ |
1363 | memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); | |
074fe897 | 1364 | |
557ce264 AA |
1365 | resp->opcnt = slot->sl_opcnt; |
1366 | resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); | |
1367 | status = slot->sl_status; | |
074fe897 AA |
1368 | |
1369 | return status; | |
1370 | } | |
1371 | ||
0733d213 AA |
1372 | /* |
1373 | * Set the exchange_id flags returned by the server. | |
1374 | */ | |
1375 | static void | |
1376 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
1377 | { | |
1378 | /* pNFS is not supported */ | |
1379 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
1380 | ||
1381 | /* Referrals are supported, Migration is not. */ | |
1382 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
1383 | ||
1384 | /* set the wire flags to return to client. */ | |
1385 | clid->flags = new->cl_exchange_flags; | |
1386 | } | |
1387 | ||
069b6ad4 AA |
1388 | __be32 |
1389 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
1390 | struct nfsd4_compound_state *cstate, | |
1391 | struct nfsd4_exchange_id *exid) | |
1392 | { | |
0733d213 AA |
1393 | struct nfs4_client *unconf, *conf, *new; |
1394 | int status; | |
1395 | unsigned int strhashval; | |
1396 | char dname[HEXDIR_LEN]; | |
363168b4 | 1397 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 1398 | nfs4_verifier verf = exid->verifier; |
363168b4 | 1399 | struct sockaddr *sa = svc_addr(rqstp); |
0733d213 | 1400 | |
363168b4 | 1401 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 1402 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 1403 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 1404 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 1405 | addr_str, exid->flags, exid->spa_how); |
0733d213 AA |
1406 | |
1407 | if (!check_name(exid->clname) || (exid->flags & ~EXCHGID4_FLAG_MASK_A)) | |
1408 | return nfserr_inval; | |
1409 | ||
1410 | /* Currently only support SP4_NONE */ | |
1411 | switch (exid->spa_how) { | |
1412 | case SP4_NONE: | |
1413 | break; | |
1414 | case SP4_SSV: | |
044bc1d4 | 1415 | return nfserr_serverfault; |
0733d213 AA |
1416 | default: |
1417 | BUG(); /* checked by xdr code */ | |
1418 | case SP4_MACH_CRED: | |
1419 | return nfserr_serverfault; /* no excuse :-/ */ | |
1420 | } | |
1421 | ||
1422 | status = nfs4_make_rec_clidname(dname, &exid->clname); | |
1423 | ||
1424 | if (status) | |
1425 | goto error; | |
1426 | ||
1427 | strhashval = clientstr_hashval(dname); | |
1428 | ||
1429 | nfs4_lock_state(); | |
1430 | status = nfs_ok; | |
1431 | ||
e203d506 | 1432 | conf = find_confirmed_client_by_str(dname, strhashval); |
0733d213 | 1433 | if (conf) { |
e203d506 BF |
1434 | if (!clp_used_exchangeid(conf)) { |
1435 | status = nfserr_clid_inuse; /* XXX: ? */ | |
1436 | goto out; | |
1437 | } | |
0733d213 AA |
1438 | if (!same_verf(&verf, &conf->cl_verifier)) { |
1439 | /* 18.35.4 case 8 */ | |
1440 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1441 | status = nfserr_not_same; | |
1442 | goto out; | |
1443 | } | |
1444 | /* Client reboot: destroy old state */ | |
1445 | expire_client(conf); | |
1446 | goto out_new; | |
1447 | } | |
1448 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { | |
1449 | /* 18.35.4 case 9 */ | |
1450 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1451 | status = nfserr_perm; | |
1452 | goto out; | |
1453 | } | |
1454 | expire_client(conf); | |
1455 | goto out_new; | |
1456 | } | |
0733d213 AA |
1457 | /* |
1458 | * Set bit when the owner id and verifier map to an already | |
1459 | * confirmed client id (18.35.3). | |
1460 | */ | |
1461 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
1462 | ||
1463 | /* | |
1464 | * Falling into 18.35.4 case 2, possible router replay. | |
1465 | * Leave confirmed record intact and return same result. | |
1466 | */ | |
1467 | copy_verf(conf, &verf); | |
1468 | new = conf; | |
1469 | goto out_copy; | |
6ddbbbfe MS |
1470 | } |
1471 | ||
1472 | /* 18.35.4 case 7 */ | |
1473 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1474 | status = nfserr_noent; | |
1475 | goto out; | |
0733d213 AA |
1476 | } |
1477 | ||
e203d506 | 1478 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
0733d213 AA |
1479 | if (unconf) { |
1480 | /* | |
1481 | * Possible retry or client restart. Per 18.35.4 case 4, | |
1482 | * a new unconfirmed record should be generated regardless | |
1483 | * of whether any properties have changed. | |
1484 | */ | |
1485 | expire_client(unconf); | |
1486 | } | |
1487 | ||
1488 | out_new: | |
1489 | /* Normal case */ | |
b09333c4 | 1490 | new = create_client(exid->clname, dname, rqstp, &verf); |
0733d213 | 1491 | if (new == NULL) { |
4731030d | 1492 | status = nfserr_jukebox; |
0733d213 AA |
1493 | goto out; |
1494 | } | |
1495 | ||
0733d213 | 1496 | gen_clid(new); |
0733d213 AA |
1497 | add_to_unconfirmed(new, strhashval); |
1498 | out_copy: | |
1499 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
1500 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
1501 | ||
38eb76a5 | 1502 | exid->seqid = 1; |
0733d213 AA |
1503 | nfsd4_set_ex_flags(new, exid); |
1504 | ||
1505 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
49557cc7 | 1506 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
1507 | status = nfs_ok; |
1508 | ||
1509 | out: | |
1510 | nfs4_unlock_state(); | |
1511 | error: | |
1512 | dprintk("nfsd4_exchange_id returns %d\n", ntohl(status)); | |
1513 | return status; | |
069b6ad4 AA |
1514 | } |
1515 | ||
b85d4c01 | 1516 | static int |
88e588d5 | 1517 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 1518 | { |
88e588d5 AA |
1519 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
1520 | slot_seqid); | |
b85d4c01 BH |
1521 | |
1522 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
1523 | if (slot_inuse) { |
1524 | if (seqid == slot_seqid) | |
b85d4c01 BH |
1525 | return nfserr_jukebox; |
1526 | else | |
1527 | return nfserr_seq_misordered; | |
1528 | } | |
1529 | /* Normal */ | |
88e588d5 | 1530 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 BH |
1531 | return nfs_ok; |
1532 | /* Replay */ | |
88e588d5 | 1533 | if (seqid == slot_seqid) |
b85d4c01 BH |
1534 | return nfserr_replay_cache; |
1535 | /* Wraparound */ | |
88e588d5 | 1536 | if (seqid == 1 && (slot_seqid + 1) == 0) |
b85d4c01 BH |
1537 | return nfs_ok; |
1538 | /* Misordered replay or misordered new request */ | |
1539 | return nfserr_seq_misordered; | |
1540 | } | |
1541 | ||
49557cc7 AA |
1542 | /* |
1543 | * Cache the create session result into the create session single DRC | |
1544 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
1545 | * Do this for solo or embedded create session operations. | |
1546 | */ | |
1547 | static void | |
1548 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
1549 | struct nfsd4_clid_slot *slot, int nfserr) | |
1550 | { | |
1551 | slot->sl_status = nfserr; | |
1552 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
1553 | } | |
1554 | ||
1555 | static __be32 | |
1556 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
1557 | struct nfsd4_clid_slot *slot) | |
1558 | { | |
1559 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
1560 | return slot->sl_status; | |
1561 | } | |
1562 | ||
1b74c25b MJ |
1563 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
1564 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
1565 | 1 + /* MIN tag is length with zero, only length */ \ | |
1566 | 3 + /* version, opcount, opcode */ \ | |
1567 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1568 | /* seqid, slotID, slotID, cache */ \ | |
1569 | 4 ) * sizeof(__be32)) | |
1570 | ||
1571 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
1572 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
1573 | 1 + /* status */ \ | |
1574 | 1 + /* MIN tag is length with zero, only length */ \ | |
1575 | 3 + /* opcount, opcode, opstatus*/ \ | |
1576 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1577 | /* seqid, slotID, slotID, slotID, status */ \ | |
1578 | 5 ) * sizeof(__be32)) | |
1579 | ||
1580 | static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs fchannel) | |
1581 | { | |
1582 | return fchannel.maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ | |
1583 | || fchannel.maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ; | |
1584 | } | |
1585 | ||
069b6ad4 AA |
1586 | __be32 |
1587 | nfsd4_create_session(struct svc_rqst *rqstp, | |
1588 | struct nfsd4_compound_state *cstate, | |
1589 | struct nfsd4_create_session *cr_ses) | |
1590 | { | |
363168b4 | 1591 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 1592 | struct nfs4_client *conf, *unconf; |
ac7c46f2 | 1593 | struct nfsd4_session *new; |
49557cc7 | 1594 | struct nfsd4_clid_slot *cs_slot = NULL; |
86c3e16c | 1595 | bool confirm_me = false; |
ec6b5d7b AA |
1596 | int status = 0; |
1597 | ||
a62573dc MJ |
1598 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
1599 | return nfserr_inval; | |
1600 | ||
ec6b5d7b AA |
1601 | nfs4_lock_state(); |
1602 | unconf = find_unconfirmed_client(&cr_ses->clientid); | |
1603 | conf = find_confirmed_client(&cr_ses->clientid); | |
1604 | ||
1605 | if (conf) { | |
49557cc7 AA |
1606 | cs_slot = &conf->cl_cs_slot; |
1607 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 1608 | if (status == nfserr_replay_cache) { |
ec6b5d7b | 1609 | dprintk("Got a create_session replay! seqid= %d\n", |
49557cc7 | 1610 | cs_slot->sl_seqid); |
38eb76a5 | 1611 | /* Return the cached reply status */ |
49557cc7 | 1612 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
38eb76a5 | 1613 | goto out; |
49557cc7 | 1614 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b AA |
1615 | status = nfserr_seq_misordered; |
1616 | dprintk("Sequence misordered!\n"); | |
1617 | dprintk("Expected seqid= %d but got seqid= %d\n", | |
49557cc7 | 1618 | cs_slot->sl_seqid, cr_ses->seqid); |
ec6b5d7b AA |
1619 | goto out; |
1620 | } | |
ec6b5d7b AA |
1621 | } else if (unconf) { |
1622 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || | |
363168b4 | 1623 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b AA |
1624 | status = nfserr_clid_inuse; |
1625 | goto out; | |
1626 | } | |
1627 | ||
49557cc7 AA |
1628 | cs_slot = &unconf->cl_cs_slot; |
1629 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
1630 | if (status) { |
1631 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 1632 | status = nfserr_seq_misordered; |
cd5b8144 | 1633 | goto out; |
ec6b5d7b AA |
1634 | } |
1635 | ||
86c3e16c | 1636 | confirm_me = true; |
ec6b5d7b AA |
1637 | conf = unconf; |
1638 | } else { | |
1639 | status = nfserr_stale_clientid; | |
1640 | goto out; | |
1641 | } | |
1642 | ||
8323c3b2 BF |
1643 | /* |
1644 | * XXX: we should probably set this at creation time, and check | |
1645 | * for consistent minorversion use throughout: | |
1646 | */ | |
1647 | conf->cl_minorversion = 1; | |
408b79bc BF |
1648 | /* |
1649 | * We do not support RDMA or persistent sessions | |
1650 | */ | |
1651 | cr_ses->flags &= ~SESSION4_PERSIST; | |
1652 | cr_ses->flags &= ~SESSION4_RDMA; | |
1653 | ||
1b74c25b MJ |
1654 | status = nfserr_toosmall; |
1655 | if (check_forechannel_attrs(cr_ses->fore_channel)) | |
1656 | goto out; | |
1657 | ||
ac7c46f2 BF |
1658 | status = nfserr_jukebox; |
1659 | new = alloc_init_session(rqstp, conf, cr_ses); | |
1660 | if (!new) | |
ec6b5d7b | 1661 | goto out; |
ac7c46f2 BF |
1662 | status = nfs_ok; |
1663 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, | |
ec6b5d7b | 1664 | NFS4_MAX_SESSIONID_LEN); |
12050657 MJ |
1665 | memcpy(&cr_ses->fore_channel, &new->se_fchannel, |
1666 | sizeof(struct nfsd4_channel_attrs)); | |
86c3e16c | 1667 | cs_slot->sl_seqid++; |
49557cc7 | 1668 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 1669 | |
49557cc7 AA |
1670 | /* cache solo and embedded create sessions under the state lock */ |
1671 | nfsd4_cache_create_session(cr_ses, cs_slot, status); | |
86c3e16c BF |
1672 | if (confirm_me) |
1673 | move_to_confirmed(conf); | |
ec6b5d7b AA |
1674 | out: |
1675 | nfs4_unlock_state(); | |
1676 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1677 | return status; | |
069b6ad4 AA |
1678 | } |
1679 | ||
57716355 BF |
1680 | static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) |
1681 | { | |
1682 | struct nfsd4_compoundres *resp = rqstp->rq_resp; | |
1683 | struct nfsd4_compoundargs *argp = rqstp->rq_argp; | |
1684 | ||
1685 | return argp->opcnt == resp->opcnt; | |
1686 | } | |
1687 | ||
1d1bc8f2 BF |
1688 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
1689 | { | |
1690 | switch (*dir) { | |
1691 | case NFS4_CDFC4_FORE: | |
1692 | case NFS4_CDFC4_BACK: | |
1693 | return nfs_ok; | |
1694 | case NFS4_CDFC4_FORE_OR_BOTH: | |
1695 | case NFS4_CDFC4_BACK_OR_BOTH: | |
1696 | *dir = NFS4_CDFC4_BOTH; | |
1697 | return nfs_ok; | |
1698 | }; | |
1699 | return nfserr_inval; | |
1700 | } | |
1701 | ||
1702 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, | |
1703 | struct nfsd4_compound_state *cstate, | |
1704 | struct nfsd4_bind_conn_to_session *bcts) | |
1705 | { | |
1706 | __be32 status; | |
1707 | ||
1708 | if (!nfsd4_last_compound_op(rqstp)) | |
1709 | return nfserr_not_only_op; | |
1710 | spin_lock(&client_lock); | |
1711 | cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid); | |
1712 | /* Sorta weird: we only need the refcnt'ing because new_conn acquires | |
1713 | * client_lock iself: */ | |
1714 | if (cstate->session) { | |
1715 | nfsd4_get_session(cstate->session); | |
1716 | atomic_inc(&cstate->session->se_client->cl_refcount); | |
1717 | } | |
1718 | spin_unlock(&client_lock); | |
1719 | if (!cstate->session) | |
1720 | return nfserr_badsession; | |
1721 | ||
1722 | status = nfsd4_map_bcts_dir(&bcts->dir); | |
1db2b9dd BS |
1723 | if (!status) |
1724 | nfsd4_new_conn(rqstp, cstate->session, bcts->dir); | |
1725 | return status; | |
1d1bc8f2 BF |
1726 | } |
1727 | ||
5d4cec2f BF |
1728 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
1729 | { | |
1730 | if (!session) | |
1731 | return 0; | |
1732 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
1733 | } | |
1734 | ||
069b6ad4 AA |
1735 | __be32 |
1736 | nfsd4_destroy_session(struct svc_rqst *r, | |
1737 | struct nfsd4_compound_state *cstate, | |
1738 | struct nfsd4_destroy_session *sessionid) | |
1739 | { | |
e10e0cfc BH |
1740 | struct nfsd4_session *ses; |
1741 | u32 status = nfserr_badsession; | |
1742 | ||
1743 | /* Notes: | |
1744 | * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid | |
1745 | * - Should we return nfserr_back_chan_busy if waiting for | |
1746 | * callbacks on to-be-destroyed session? | |
1747 | * - Do we need to clear any callback info from previous session? | |
1748 | */ | |
1749 | ||
5d4cec2f | 1750 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 BF |
1751 | if (!nfsd4_last_compound_op(r)) |
1752 | return nfserr_not_only_op; | |
1753 | } | |
e10e0cfc | 1754 | dump_sessionid(__func__, &sessionid->sessionid); |
9089f1b4 | 1755 | spin_lock(&client_lock); |
e10e0cfc BH |
1756 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid); |
1757 | if (!ses) { | |
9089f1b4 | 1758 | spin_unlock(&client_lock); |
e10e0cfc BH |
1759 | goto out; |
1760 | } | |
1761 | ||
1762 | unhash_session(ses); | |
9089f1b4 | 1763 | spin_unlock(&client_lock); |
e10e0cfc | 1764 | |
ab707e15 | 1765 | nfs4_lock_state(); |
84f5f7cc | 1766 | nfsd4_probe_callback_sync(ses->se_client); |
ab707e15 | 1767 | nfs4_unlock_state(); |
19cf5c02 BF |
1768 | |
1769 | nfsd4_del_conns(ses); | |
1770 | ||
e10e0cfc BH |
1771 | nfsd4_put_session(ses); |
1772 | status = nfs_ok; | |
1773 | out: | |
1774 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1775 | return status; | |
069b6ad4 AA |
1776 | } |
1777 | ||
a663bdd8 | 1778 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
1779 | { |
1780 | struct nfsd4_conn *c; | |
1781 | ||
1782 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 1783 | if (c->cn_xprt == xpt) { |
328ead28 BF |
1784 | return c; |
1785 | } | |
1786 | } | |
1787 | return NULL; | |
1788 | } | |
1789 | ||
a663bdd8 | 1790 | static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
1791 | { |
1792 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 1793 | struct nfsd4_conn *c; |
21b75b01 | 1794 | int ret; |
328ead28 BF |
1795 | |
1796 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 1797 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
328ead28 BF |
1798 | if (c) { |
1799 | spin_unlock(&clp->cl_lock); | |
1800 | free_conn(new); | |
1801 | return; | |
1802 | } | |
1803 | __nfsd4_hash_conn(new, ses); | |
1804 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
1805 | ret = nfsd4_register_conn(new); |
1806 | if (ret) | |
1807 | /* oops; xprt is already down: */ | |
1808 | nfsd4_conn_lost(&new->cn_xpt_user); | |
328ead28 BF |
1809 | return; |
1810 | } | |
1811 | ||
868b89c3 MJ |
1812 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
1813 | { | |
1814 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
1815 | ||
1816 | return args->opcnt > session->se_fchannel.maxops; | |
1817 | } | |
1818 | ||
ae82a8d0 MJ |
1819 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
1820 | struct nfsd4_session *session) | |
1821 | { | |
1822 | struct xdr_buf *xb = &rqstp->rq_arg; | |
1823 | ||
1824 | return xb->len > session->se_fchannel.maxreq_sz; | |
1825 | } | |
1826 | ||
069b6ad4 | 1827 | __be32 |
b85d4c01 | 1828 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
1829 | struct nfsd4_compound_state *cstate, |
1830 | struct nfsd4_sequence *seq) | |
1831 | { | |
f9bb94c4 | 1832 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
b85d4c01 BH |
1833 | struct nfsd4_session *session; |
1834 | struct nfsd4_slot *slot; | |
a663bdd8 | 1835 | struct nfsd4_conn *conn; |
b85d4c01 BH |
1836 | int status; |
1837 | ||
f9bb94c4 AA |
1838 | if (resp->opcnt != 1) |
1839 | return nfserr_sequence_pos; | |
1840 | ||
a663bdd8 BF |
1841 | /* |
1842 | * Will be either used or freed by nfsd4_sequence_check_conn | |
1843 | * below. | |
1844 | */ | |
1845 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
1846 | if (!conn) | |
1847 | return nfserr_jukebox; | |
1848 | ||
9089f1b4 | 1849 | spin_lock(&client_lock); |
b85d4c01 BH |
1850 | status = nfserr_badsession; |
1851 | session = find_in_sessionid_hashtbl(&seq->sessionid); | |
1852 | if (!session) | |
1853 | goto out; | |
1854 | ||
868b89c3 MJ |
1855 | status = nfserr_too_many_ops; |
1856 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
1857 | goto out; | |
1858 | ||
ae82a8d0 MJ |
1859 | status = nfserr_req_too_big; |
1860 | if (nfsd4_request_too_big(rqstp, session)) | |
1861 | goto out; | |
1862 | ||
b85d4c01 | 1863 | status = nfserr_badslot; |
6c18ba9f | 1864 | if (seq->slotid >= session->se_fchannel.maxreqs) |
b85d4c01 BH |
1865 | goto out; |
1866 | ||
557ce264 | 1867 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
1868 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
1869 | ||
a8dfdaeb AA |
1870 | /* We do not negotiate the number of slots yet, so set the |
1871 | * maxslots to the session maxreqs which is used to encode | |
1872 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
1873 | seq->maxslots = session->se_fchannel.maxreqs; | |
1874 | ||
88e588d5 | 1875 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, slot->sl_inuse); |
b85d4c01 BH |
1876 | if (status == nfserr_replay_cache) { |
1877 | cstate->slot = slot; | |
1878 | cstate->session = session; | |
da3846a2 | 1879 | /* Return the cached reply status and set cstate->status |
557ce264 | 1880 | * for nfsd4_proc_compound processing */ |
bf864a31 | 1881 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 1882 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 1883 | goto out; |
b85d4c01 BH |
1884 | } |
1885 | if (status) | |
1886 | goto out; | |
1887 | ||
a663bdd8 BF |
1888 | nfsd4_sequence_check_conn(conn, session); |
1889 | conn = NULL; | |
328ead28 | 1890 | |
b85d4c01 BH |
1891 | /* Success! bump slot seqid */ |
1892 | slot->sl_inuse = true; | |
1893 | slot->sl_seqid = seq->seqid; | |
557ce264 | 1894 | slot->sl_cachethis = seq->cachethis; |
b85d4c01 BH |
1895 | |
1896 | cstate->slot = slot; | |
1897 | cstate->session = session; | |
1898 | ||
b85d4c01 | 1899 | out: |
26c0c75e | 1900 | /* Hold a session reference until done processing the compound. */ |
aaf84eb9 | 1901 | if (cstate->session) { |
0d7bb719 BF |
1902 | struct nfs4_client *clp = session->se_client; |
1903 | ||
36acb66b | 1904 | nfsd4_get_session(cstate->session); |
0d7bb719 BF |
1905 | atomic_inc(&clp->cl_refcount); |
1906 | if (clp->cl_cb_state == NFSD4_CB_DOWN) | |
1907 | seq->status_flags |= SEQ4_STATUS_CB_PATH_DOWN; | |
aaf84eb9 | 1908 | } |
a663bdd8 | 1909 | kfree(conn); |
36acb66b | 1910 | spin_unlock(&client_lock); |
b85d4c01 BH |
1911 | dprintk("%s: return %d\n", __func__, ntohl(status)); |
1912 | return status; | |
069b6ad4 AA |
1913 | } |
1914 | ||
4dc6ec00 BF |
1915 | __be32 |
1916 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
1917 | { | |
bcecf1cc MJ |
1918 | int status = 0; |
1919 | ||
4dc6ec00 BF |
1920 | if (rc->rca_one_fs) { |
1921 | if (!cstate->current_fh.fh_dentry) | |
1922 | return nfserr_nofilehandle; | |
1923 | /* | |
1924 | * We don't take advantage of the rca_one_fs case. | |
1925 | * That's OK, it's optional, we can safely ignore it. | |
1926 | */ | |
1927 | return nfs_ok; | |
1928 | } | |
bcecf1cc | 1929 | |
4dc6ec00 | 1930 | nfs4_lock_state(); |
bcecf1cc MJ |
1931 | status = nfserr_complete_already; |
1932 | if (cstate->session->se_client->cl_firststate) | |
1933 | goto out; | |
1934 | ||
1935 | status = nfserr_stale_clientid; | |
1936 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
1937 | /* |
1938 | * The following error isn't really legal. | |
1939 | * But we only get here if the client just explicitly | |
1940 | * destroyed the client. Surely it no longer cares what | |
1941 | * error it gets back on an operation for the dead | |
1942 | * client. | |
1943 | */ | |
bcecf1cc MJ |
1944 | goto out; |
1945 | ||
1946 | status = nfs_ok; | |
4dc6ec00 | 1947 | nfsd4_create_clid_dir(cstate->session->se_client); |
bcecf1cc | 1948 | out: |
4dc6ec00 | 1949 | nfs4_unlock_state(); |
bcecf1cc | 1950 | return status; |
4dc6ec00 BF |
1951 | } |
1952 | ||
b37ad28b | 1953 | __be32 |
b591480b BF |
1954 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
1955 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 1956 | { |
1da177e4 LT |
1957 | struct xdr_netobj clname = { |
1958 | .len = setclid->se_namelen, | |
1959 | .data = setclid->se_name, | |
1960 | }; | |
1961 | nfs4_verifier clverifier = setclid->se_verf; | |
1962 | unsigned int strhashval; | |
28ce6054 | 1963 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 1964 | __be32 status; |
a55370a3 | 1965 | char dname[HEXDIR_LEN]; |
1da177e4 | 1966 | |
1da177e4 | 1967 | if (!check_name(clname)) |
73aea4ec | 1968 | return nfserr_inval; |
1da177e4 | 1969 | |
a55370a3 N |
1970 | status = nfs4_make_rec_clidname(dname, &clname); |
1971 | if (status) | |
73aea4ec | 1972 | return status; |
a55370a3 | 1973 | |
1da177e4 LT |
1974 | /* |
1975 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
1976 | * We get here on a DRC miss. | |
1977 | */ | |
1978 | ||
a55370a3 | 1979 | strhashval = clientstr_hashval(dname); |
1da177e4 | 1980 | |
1da177e4 | 1981 | nfs4_lock_state(); |
e203d506 | 1982 | conf = find_confirmed_client_by_str(dname, strhashval); |
28ce6054 | 1983 | if (conf) { |
a186e767 | 1984 | /* RFC 3530 14.2.33 CASE 0: */ |
1da177e4 | 1985 | status = nfserr_clid_inuse; |
e203d506 BF |
1986 | if (clp_used_exchangeid(conf)) |
1987 | goto out; | |
026722c2 | 1988 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
1989 | char addr_str[INET6_ADDRSTRLEN]; |
1990 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
1991 | sizeof(addr_str)); | |
1992 | dprintk("NFSD: setclientid: string in use by client " | |
1993 | "at %s\n", addr_str); | |
1da177e4 LT |
1994 | goto out; |
1995 | } | |
1da177e4 | 1996 | } |
a186e767 BF |
1997 | /* |
1998 | * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") | |
1999 | * has a description of SETCLIENTID request processing consisting | |
2000 | * of 5 bullet points, labeled as CASE0 - CASE4 below. | |
2001 | */ | |
e203d506 | 2002 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
3e772463 | 2003 | status = nfserr_jukebox; |
1da177e4 | 2004 | if (!conf) { |
a186e767 BF |
2005 | /* |
2006 | * RFC 3530 14.2.33 CASE 4: | |
2007 | * placed first, because it is the normal case | |
1da177e4 LT |
2008 | */ |
2009 | if (unconf) | |
2010 | expire_client(unconf); | |
b09333c4 | 2011 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 2012 | if (new == NULL) |
1da177e4 | 2013 | goto out; |
1da177e4 | 2014 | gen_clid(new); |
599e0a22 | 2015 | } else if (same_verf(&conf->cl_verifier, &clverifier)) { |
1da177e4 | 2016 | /* |
a186e767 BF |
2017 | * RFC 3530 14.2.33 CASE 1: |
2018 | * probable callback update | |
1da177e4 | 2019 | */ |
31f4a6c1 N |
2020 | if (unconf) { |
2021 | /* Note this is removing unconfirmed {*x***}, | |
2022 | * which is stronger than RFC recommended {vxc**}. | |
2023 | * This has the advantage that there is at most | |
2024 | * one {*x***} in either list at any time. | |
2025 | */ | |
2026 | expire_client(unconf); | |
1da177e4 | 2027 | } |
b09333c4 | 2028 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 2029 | if (new == NULL) |
1da177e4 | 2030 | goto out; |
1da177e4 | 2031 | copy_clid(new, conf); |
1da177e4 LT |
2032 | } else if (!unconf) { |
2033 | /* | |
a186e767 BF |
2034 | * RFC 3530 14.2.33 CASE 2: |
2035 | * probable client reboot; state will be removed if | |
2036 | * confirmed. | |
1da177e4 | 2037 | */ |
b09333c4 | 2038 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 2039 | if (new == NULL) |
1da177e4 | 2040 | goto out; |
1da177e4 | 2041 | gen_clid(new); |
49ba8781 | 2042 | } else { |
a186e767 BF |
2043 | /* |
2044 | * RFC 3530 14.2.33 CASE 3: | |
2045 | * probable client reboot; state will be removed if | |
2046 | * confirmed. | |
1da177e4 LT |
2047 | */ |
2048 | expire_client(unconf); | |
b09333c4 | 2049 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 2050 | if (new == NULL) |
1da177e4 | 2051 | goto out; |
1da177e4 | 2052 | gen_clid(new); |
1da177e4 | 2053 | } |
8323c3b2 BF |
2054 | /* |
2055 | * XXX: we should probably set this at creation time, and check | |
2056 | * for consistent minorversion use throughout: | |
2057 | */ | |
2058 | new->cl_minorversion = 0; | |
6f3d772f | 2059 | gen_callback(new, setclid, rqstp); |
c175b83c | 2060 | add_to_unconfirmed(new, strhashval); |
1da177e4 LT |
2061 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
2062 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
2063 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
2064 | status = nfs_ok; | |
2065 | out: | |
2066 | nfs4_unlock_state(); | |
2067 | return status; | |
2068 | } | |
2069 | ||
2070 | ||
2071 | /* | |
a186e767 BF |
2072 | * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has |
2073 | * a description of SETCLIENTID_CONFIRM request processing consisting of 4 | |
2074 | * bullets, labeled as CASE1 - CASE4 below. | |
1da177e4 | 2075 | */ |
b37ad28b | 2076 | __be32 |
b591480b BF |
2077 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
2078 | struct nfsd4_compound_state *cstate, | |
2079 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 2080 | { |
363168b4 | 2081 | struct sockaddr *sa = svc_addr(rqstp); |
21ab45a4 | 2082 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
2083 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
2084 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 2085 | __be32 status; |
1da177e4 LT |
2086 | |
2087 | if (STALE_CLIENTID(clid)) | |
2088 | return nfserr_stale_clientid; | |
2089 | /* | |
2090 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
2091 | * We get here on a DRC miss. | |
2092 | */ | |
2093 | ||
2094 | nfs4_lock_state(); | |
21ab45a4 N |
2095 | |
2096 | conf = find_confirmed_client(clid); | |
2097 | unconf = find_unconfirmed_client(clid); | |
2098 | ||
2099 | status = nfserr_clid_inuse; | |
363168b4 | 2100 | if (conf && !rpc_cmp_addr((struct sockaddr *) &conf->cl_addr, sa)) |
21ab45a4 | 2101 | goto out; |
363168b4 | 2102 | if (unconf && !rpc_cmp_addr((struct sockaddr *) &unconf->cl_addr, sa)) |
21ab45a4 N |
2103 | goto out; |
2104 | ||
a186e767 BF |
2105 | /* |
2106 | * section 14.2.34 of RFC 3530 has a description of | |
2107 | * SETCLIENTID_CONFIRM request processing consisting | |
2108 | * of 4 bullet points, labeled as CASE1 - CASE4 below. | |
2109 | */ | |
366e0c1d | 2110 | if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { |
a186e767 BF |
2111 | /* |
2112 | * RFC 3530 14.2.34 CASE 1: | |
2113 | * callback update | |
2114 | */ | |
599e0a22 | 2115 | if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) |
1da177e4 LT |
2116 | status = nfserr_clid_inuse; |
2117 | else { | |
5a3c9d71 BF |
2118 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
2119 | nfsd4_probe_callback(conf); | |
1a69c179 | 2120 | expire_client(unconf); |
1da177e4 | 2121 | status = nfs_ok; |
1a69c179 | 2122 | |
1da177e4 | 2123 | } |
f3aba4e5 | 2124 | } else if (conf && !unconf) { |
a186e767 BF |
2125 | /* |
2126 | * RFC 3530 14.2.34 CASE 2: | |
2127 | * probable retransmitted request; play it safe and | |
2128 | * do nothing. | |
7c79f737 | 2129 | */ |
599e0a22 | 2130 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) |
1da177e4 | 2131 | status = nfserr_clid_inuse; |
21ab45a4 | 2132 | else |
1da177e4 | 2133 | status = nfs_ok; |
7c79f737 | 2134 | } else if (!conf && unconf |
599e0a22 | 2135 | && same_verf(&unconf->cl_confirm, &confirm)) { |
a186e767 BF |
2136 | /* |
2137 | * RFC 3530 14.2.34 CASE 3: | |
2138 | * Normal case; new or rebooted client: | |
7c79f737 | 2139 | */ |
599e0a22 | 2140 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { |
1da177e4 LT |
2141 | status = nfserr_clid_inuse; |
2142 | } else { | |
1a69c179 N |
2143 | unsigned int hash = |
2144 | clientstr_hashval(unconf->cl_recdir); | |
2145 | conf = find_confirmed_client_by_str(unconf->cl_recdir, | |
e203d506 | 2146 | hash); |
1a69c179 | 2147 | if (conf) { |
c7b9a459 | 2148 | nfsd4_remove_clid_dir(conf); |
1a69c179 N |
2149 | expire_client(conf); |
2150 | } | |
1da177e4 | 2151 | move_to_confirmed(unconf); |
21ab45a4 | 2152 | conf = unconf; |
5a3c9d71 | 2153 | nfsd4_probe_callback(conf); |
1a69c179 | 2154 | status = nfs_ok; |
1da177e4 | 2155 | } |
599e0a22 BF |
2156 | } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) |
2157 | && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, | |
7c79f737 | 2158 | &confirm)))) { |
a186e767 BF |
2159 | /* |
2160 | * RFC 3530 14.2.34 CASE 4: | |
2161 | * Client probably hasn't noticed that we rebooted yet. | |
7c79f737 | 2162 | */ |
1da177e4 | 2163 | status = nfserr_stale_clientid; |
7c79f737 | 2164 | } else { |
08e8987c N |
2165 | /* check that we have hit one of the cases...*/ |
2166 | status = nfserr_clid_inuse; | |
2167 | } | |
1da177e4 | 2168 | out: |
1da177e4 LT |
2169 | nfs4_unlock_state(); |
2170 | return status; | |
2171 | } | |
2172 | ||
1da177e4 LT |
2173 | /* OPEN Share state helper functions */ |
2174 | static inline struct nfs4_file * | |
2175 | alloc_init_file(struct inode *ino) | |
2176 | { | |
2177 | struct nfs4_file *fp; | |
2178 | unsigned int hashval = file_hashval(ino); | |
2179 | ||
e60d4398 N |
2180 | fp = kmem_cache_alloc(file_slab, GFP_KERNEL); |
2181 | if (fp) { | |
8b671b80 | 2182 | atomic_set(&fp->fi_ref, 1); |
1da177e4 | 2183 | INIT_LIST_HEAD(&fp->fi_hash); |
8beefa24 N |
2184 | INIT_LIST_HEAD(&fp->fi_stateids); |
2185 | INIT_LIST_HEAD(&fp->fi_delegations); | |
1da177e4 LT |
2186 | fp->fi_inode = igrab(ino); |
2187 | fp->fi_id = current_fileid++; | |
47f9940c | 2188 | fp->fi_had_conflict = false; |
acfdf5c3 | 2189 | fp->fi_lease = NULL; |
f9d7562f BF |
2190 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); |
2191 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
47cee541 PE |
2192 | spin_lock(&recall_lock); |
2193 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); | |
2194 | spin_unlock(&recall_lock); | |
1da177e4 LT |
2195 | return fp; |
2196 | } | |
2197 | return NULL; | |
2198 | } | |
2199 | ||
e60d4398 | 2200 | static void |
e18b890b | 2201 | nfsd4_free_slab(struct kmem_cache **slab) |
1da177e4 | 2202 | { |
e60d4398 N |
2203 | if (*slab == NULL) |
2204 | return; | |
1a1d92c1 | 2205 | kmem_cache_destroy(*slab); |
e60d4398 | 2206 | *slab = NULL; |
1da177e4 LT |
2207 | } |
2208 | ||
e8ff2a84 | 2209 | void |
1da177e4 LT |
2210 | nfsd4_free_slabs(void) |
2211 | { | |
fe0750e5 BF |
2212 | nfsd4_free_slab(&openowner_slab); |
2213 | nfsd4_free_slab(&lockowner_slab); | |
e60d4398 | 2214 | nfsd4_free_slab(&file_slab); |
5ac049ac | 2215 | nfsd4_free_slab(&stateid_slab); |
5b2d21c1 | 2216 | nfsd4_free_slab(&deleg_slab); |
e60d4398 | 2217 | } |
1da177e4 | 2218 | |
e60d4398 N |
2219 | static int |
2220 | nfsd4_init_slabs(void) | |
2221 | { | |
fe0750e5 BF |
2222 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
2223 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2224 | if (openowner_slab == NULL) | |
2225 | goto out_nomem; | |
2226 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", | |
2227 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2228 | if (lockowner_slab == NULL) | |
e60d4398 N |
2229 | goto out_nomem; |
2230 | file_slab = kmem_cache_create("nfsd4_files", | |
20c2df83 | 2231 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 N |
2232 | if (file_slab == NULL) |
2233 | goto out_nomem; | |
5ac049ac | 2234 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
dcef0413 | 2235 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
5ac049ac N |
2236 | if (stateid_slab == NULL) |
2237 | goto out_nomem; | |
5b2d21c1 | 2238 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 2239 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 N |
2240 | if (deleg_slab == NULL) |
2241 | goto out_nomem; | |
e60d4398 N |
2242 | return 0; |
2243 | out_nomem: | |
2244 | nfsd4_free_slabs(); | |
2245 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | |
2246 | return -ENOMEM; | |
1da177e4 LT |
2247 | } |
2248 | ||
fe0750e5 BF |
2249 | void nfs4_free_openowner(struct nfs4_openowner *oo) |
2250 | { | |
2251 | kfree(oo->oo_owner.so_owner.data); | |
2252 | kmem_cache_free(openowner_slab, oo); | |
2253 | } | |
2254 | ||
2255 | void nfs4_free_lockowner(struct nfs4_lockowner *lo) | |
1da177e4 | 2256 | { |
fe0750e5 BF |
2257 | kfree(lo->lo_owner.so_owner.data); |
2258 | kmem_cache_free(lockowner_slab, lo); | |
1da177e4 LT |
2259 | } |
2260 | ||
ff194bd9 | 2261 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 2262 | { |
ff194bd9 BF |
2263 | rp->rp_status = nfserr_serverfault; |
2264 | rp->rp_buflen = 0; | |
2265 | rp->rp_buf = rp->rp_ibuf; | |
1da177e4 LT |
2266 | } |
2267 | ||
fe0750e5 | 2268 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 2269 | { |
1da177e4 | 2270 | struct nfs4_stateowner *sop; |
1da177e4 | 2271 | |
fe0750e5 | 2272 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
2273 | if (!sop) |
2274 | return NULL; | |
2275 | ||
2276 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); | |
2277 | if (!sop->so_owner.data) { | |
fe0750e5 | 2278 | kmem_cache_free(slab, sop); |
1da177e4 | 2279 | return NULL; |
ff194bd9 BF |
2280 | } |
2281 | sop->so_owner.len = owner->len; | |
2282 | ||
ea1da636 | 2283 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 | 2284 | sop->so_id = current_ownerid++; |
ff194bd9 BF |
2285 | sop->so_client = clp; |
2286 | init_nfs4_replay(&sop->so_replay); | |
2287 | return sop; | |
2288 | } | |
2289 | ||
fe0750e5 | 2290 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 BF |
2291 | { |
2292 | unsigned int idhashval; | |
2293 | ||
fe0750e5 BF |
2294 | idhashval = open_ownerid_hashval(oo->oo_owner.so_id); |
2295 | list_add(&oo->oo_owner.so_idhash, &open_ownerid_hashtbl[idhashval]); | |
2296 | list_add(&oo->oo_owner.so_strhash, &open_ownerstr_hashtbl[strhashval]); | |
2297 | list_add(&oo->oo_perclient, &clp->cl_openowners); | |
ff194bd9 BF |
2298 | } |
2299 | ||
fe0750e5 | 2300 | static struct nfs4_openowner * |
ff194bd9 | 2301 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { |
fe0750e5 | 2302 | struct nfs4_openowner *oo; |
ff194bd9 | 2303 | |
fe0750e5 BF |
2304 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
2305 | if (!oo) | |
ff194bd9 | 2306 | return NULL; |
fe0750e5 BF |
2307 | oo->oo_owner.so_is_open_owner = 1; |
2308 | oo->oo_owner.so_seqid = open->op_seqid; | |
2309 | oo->oo_confirmed = 0; | |
2310 | oo->oo_time = 0; | |
2311 | INIT_LIST_HEAD(&oo->oo_close_lru); | |
2312 | hash_openowner(oo, clp, strhashval); | |
2313 | return oo; | |
1da177e4 LT |
2314 | } |
2315 | ||
1da177e4 | 2316 | static inline void |
dcef0413 | 2317 | init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { |
fe0750e5 BF |
2318 | struct nfs4_openowner *oo = open->op_openowner; |
2319 | unsigned int hashval = stateid_hashval(oo->oo_owner.so_id, fp->fi_id); | |
1da177e4 | 2320 | |
ea1da636 | 2321 | INIT_LIST_HEAD(&stp->st_lockowners); |
dcef0413 | 2322 | list_add(&stp->st_stid.sc_hash, &stateid_hashtbl[hashval]); |
fe0750e5 | 2323 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); |
8beefa24 | 2324 | list_add(&stp->st_perfile, &fp->fi_stateids); |
dcef0413 | 2325 | stp->st_stid.sc_type = NFS4_OPEN_STID; |
fe0750e5 | 2326 | stp->st_stateowner = &oo->oo_owner; |
13cd2184 | 2327 | get_nfs4_file(fp); |
1da177e4 | 2328 | stp->st_file = fp; |
dcef0413 BF |
2329 | stp->st_stid.sc_stateid.si_boot = boot_time; |
2330 | stp->st_stid.sc_stateid.si_stateownerid = oo->oo_owner.so_id; | |
2331 | stp->st_stid.sc_stateid.si_fileid = fp->fi_id; | |
73997dc4 | 2332 | /* note will be incremented before first return to client: */ |
dcef0413 | 2333 | stp->st_stid.sc_stateid.si_generation = 0; |
1da177e4 LT |
2334 | stp->st_access_bmap = 0; |
2335 | stp->st_deny_bmap = 0; | |
84459a11 AA |
2336 | __set_bit(open->op_share_access & ~NFS4_SHARE_WANT_MASK, |
2337 | &stp->st_access_bmap); | |
1da177e4 | 2338 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
4c4cd222 | 2339 | stp->st_openstp = NULL; |
1da177e4 LT |
2340 | } |
2341 | ||
fd39ca9a | 2342 | static void |
fe0750e5 | 2343 | move_to_close_lru(struct nfs4_openowner *oo) |
1da177e4 | 2344 | { |
fe0750e5 | 2345 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 2346 | |
fe0750e5 BF |
2347 | list_move_tail(&oo->oo_close_lru, &close_lru); |
2348 | oo->oo_time = get_seconds(); | |
1da177e4 LT |
2349 | } |
2350 | ||
1da177e4 | 2351 | static int |
599e0a22 BF |
2352 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
2353 | clientid_t *clid) | |
2354 | { | |
2355 | return (sop->so_owner.len == owner->len) && | |
2356 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
2357 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
2358 | } |
2359 | ||
fe0750e5 | 2360 | static struct nfs4_openowner * |
1da177e4 LT |
2361 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) |
2362 | { | |
2363 | struct nfs4_stateowner *so = NULL; | |
2364 | ||
506f275f | 2365 | list_for_each_entry(so, &open_ownerstr_hashtbl[hashval], so_strhash) { |
599e0a22 | 2366 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) |
fe0750e5 | 2367 | return container_of(so, struct nfs4_openowner, oo_owner); |
1da177e4 LT |
2368 | } |
2369 | return NULL; | |
2370 | } | |
2371 | ||
2372 | /* search file_hashtbl[] for file */ | |
2373 | static struct nfs4_file * | |
2374 | find_file(struct inode *ino) | |
2375 | { | |
2376 | unsigned int hashval = file_hashval(ino); | |
2377 | struct nfs4_file *fp; | |
2378 | ||
8b671b80 | 2379 | spin_lock(&recall_lock); |
1da177e4 | 2380 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
13cd2184 N |
2381 | if (fp->fi_inode == ino) { |
2382 | get_nfs4_file(fp); | |
8b671b80 | 2383 | spin_unlock(&recall_lock); |
1da177e4 | 2384 | return fp; |
13cd2184 | 2385 | } |
1da177e4 | 2386 | } |
8b671b80 | 2387 | spin_unlock(&recall_lock); |
1da177e4 LT |
2388 | return NULL; |
2389 | } | |
2390 | ||
d87a8ade | 2391 | static inline int access_valid(u32 x, u32 minorversion) |
ba5a6a19 | 2392 | { |
d87a8ade | 2393 | if ((x & NFS4_SHARE_ACCESS_MASK) < NFS4_SHARE_ACCESS_READ) |
8838dc43 | 2394 | return 0; |
d87a8ade AA |
2395 | if ((x & NFS4_SHARE_ACCESS_MASK) > NFS4_SHARE_ACCESS_BOTH) |
2396 | return 0; | |
2397 | x &= ~NFS4_SHARE_ACCESS_MASK; | |
2398 | if (minorversion && x) { | |
2399 | if ((x & NFS4_SHARE_WANT_MASK) > NFS4_SHARE_WANT_CANCEL) | |
2400 | return 0; | |
2401 | if ((x & NFS4_SHARE_WHEN_MASK) > NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED) | |
2402 | return 0; | |
2403 | x &= ~(NFS4_SHARE_WANT_MASK | NFS4_SHARE_WHEN_MASK); | |
2404 | } | |
2405 | if (x) | |
8838dc43 BF |
2406 | return 0; |
2407 | return 1; | |
ba5a6a19 BF |
2408 | } |
2409 | ||
8838dc43 | 2410 | static inline int deny_valid(u32 x) |
ba5a6a19 | 2411 | { |
8838dc43 BF |
2412 | /* Note: unlike access bits, deny bits may be zero. */ |
2413 | return x <= NFS4_SHARE_DENY_BOTH; | |
ba5a6a19 | 2414 | } |
1da177e4 | 2415 | |
1da177e4 LT |
2416 | /* |
2417 | * Called to check deny when READ with all zero stateid or | |
2418 | * WRITE with all zero or all one stateid | |
2419 | */ | |
b37ad28b | 2420 | static __be32 |
1da177e4 LT |
2421 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
2422 | { | |
2423 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2424 | struct nfs4_file *fp; | |
dcef0413 | 2425 | struct nfs4_ol_stateid *stp; |
b37ad28b | 2426 | __be32 ret; |
1da177e4 LT |
2427 | |
2428 | dprintk("NFSD: nfs4_share_conflict\n"); | |
2429 | ||
2430 | fp = find_file(ino); | |
13cd2184 N |
2431 | if (!fp) |
2432 | return nfs_ok; | |
b700949b | 2433 | ret = nfserr_locked; |
1da177e4 | 2434 | /* Search for conflicting share reservations */ |
13cd2184 N |
2435 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
2436 | if (test_bit(deny_type, &stp->st_deny_bmap) || | |
2437 | test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) | |
2438 | goto out; | |
1da177e4 | 2439 | } |
13cd2184 N |
2440 | ret = nfs_ok; |
2441 | out: | |
2442 | put_nfs4_file(fp); | |
2443 | return ret; | |
1da177e4 LT |
2444 | } |
2445 | ||
6b57d9c8 | 2446 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
1da177e4 | 2447 | { |
1da177e4 LT |
2448 | /* We're assuming the state code never drops its reference |
2449 | * without first removing the lease. Since we're in this lease | |
2450 | * callback (and since the lease code is serialized by the kernel | |
2451 | * lock) we know the server hasn't removed the lease yet, we know | |
2452 | * it's safe to take a reference: */ | |
2453 | atomic_inc(&dp->dl_count); | |
2454 | ||
1da177e4 | 2455 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); |
1da177e4 | 2456 | |
460781b5 | 2457 | /* only place dl_time is set. protected by lock_flocks*/ |
1da177e4 LT |
2458 | dp->dl_time = get_seconds(); |
2459 | ||
6b57d9c8 BF |
2460 | nfsd4_cb_recall(dp); |
2461 | } | |
2462 | ||
acfdf5c3 | 2463 | /* Called from break_lease() with lock_flocks() held. */ |
6b57d9c8 BF |
2464 | static void nfsd_break_deleg_cb(struct file_lock *fl) |
2465 | { | |
acfdf5c3 BF |
2466 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
2467 | struct nfs4_delegation *dp; | |
6b57d9c8 | 2468 | |
acfdf5c3 BF |
2469 | BUG_ON(!fp); |
2470 | /* We assume break_lease is only called once per lease: */ | |
2471 | BUG_ON(fp->fi_had_conflict); | |
0272e1fd BF |
2472 | /* |
2473 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 2474 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 2475 | * in time: |
0272e1fd BF |
2476 | */ |
2477 | fl->fl_break_time = 0; | |
1da177e4 | 2478 | |
5d926e8c | 2479 | spin_lock(&recall_lock); |
acfdf5c3 BF |
2480 | fp->fi_had_conflict = true; |
2481 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
2482 | nfsd_break_one_deleg(dp); | |
5d926e8c | 2483 | spin_unlock(&recall_lock); |
1da177e4 LT |
2484 | } |
2485 | ||
1da177e4 LT |
2486 | static |
2487 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
2488 | { | |
2489 | if (arg & F_UNLCK) | |
2490 | return lease_modify(onlist, arg); | |
2491 | else | |
2492 | return -EAGAIN; | |
2493 | } | |
2494 | ||
7b021967 | 2495 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
2496 | .lm_break = nfsd_break_deleg_cb, |
2497 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
2498 | }; |
2499 | ||
7a8711c9 BF |
2500 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
2501 | { | |
2502 | if (nfsd4_has_session(cstate)) | |
2503 | return nfs_ok; | |
2504 | if (seqid == so->so_seqid - 1) | |
2505 | return nfserr_replay_me; | |
2506 | if (seqid == so->so_seqid) | |
2507 | return nfs_ok; | |
2508 | return nfserr_bad_seqid; | |
2509 | } | |
1da177e4 | 2510 | |
b37ad28b | 2511 | __be32 |
6668958f AA |
2512 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
2513 | struct nfsd4_open *open) | |
1da177e4 | 2514 | { |
1da177e4 LT |
2515 | clientid_t *clientid = &open->op_clientid; |
2516 | struct nfs4_client *clp = NULL; | |
2517 | unsigned int strhashval; | |
fe0750e5 | 2518 | struct nfs4_openowner *oo = NULL; |
7a8711c9 | 2519 | __be32 status; |
1da177e4 | 2520 | |
1da177e4 | 2521 | if (!check_name(open->op_owner)) |
0f442aa2 | 2522 | return nfserr_inval; |
1da177e4 LT |
2523 | |
2524 | if (STALE_CLIENTID(&open->op_clientid)) | |
2525 | return nfserr_stale_clientid; | |
2526 | ||
506f275f | 2527 | strhashval = open_ownerstr_hashval(clientid->cl_id, &open->op_owner); |
fe0750e5 BF |
2528 | oo = find_openstateowner_str(strhashval, open); |
2529 | open->op_openowner = oo; | |
2530 | if (!oo) { | |
0f442aa2 | 2531 | /* Make sure the client's lease hasn't expired. */ |
1da177e4 LT |
2532 | clp = find_confirmed_client(clientid); |
2533 | if (clp == NULL) | |
0f442aa2 BF |
2534 | return nfserr_expired; |
2535 | goto renew; | |
1da177e4 | 2536 | } |
fe0750e5 | 2537 | if (!oo->oo_confirmed) { |
0f442aa2 | 2538 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
2539 | clp = oo->oo_owner.so_client; |
2540 | release_openowner(oo); | |
2541 | open->op_openowner = NULL; | |
0f442aa2 BF |
2542 | goto renew; |
2543 | } | |
fe0750e5 | 2544 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
7a8711c9 BF |
2545 | if (status) |
2546 | return status; | |
1da177e4 | 2547 | renew: |
fe0750e5 BF |
2548 | if (open->op_openowner == NULL) { |
2549 | oo = alloc_init_open_stateowner(strhashval, clp, open); | |
2550 | if (oo == NULL) | |
3e772463 | 2551 | return nfserr_jukebox; |
fe0750e5 | 2552 | open->op_openowner = oo; |
0f442aa2 | 2553 | } |
fe0750e5 BF |
2554 | list_del_init(&oo->oo_close_lru); |
2555 | renew_client(oo->oo_owner.so_client); | |
0f442aa2 | 2556 | return nfs_ok; |
1da177e4 LT |
2557 | } |
2558 | ||
b37ad28b | 2559 | static inline __be32 |
4a6e43e6 N |
2560 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
2561 | { | |
2562 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
2563 | return nfserr_openmode; | |
2564 | else | |
2565 | return nfs_ok; | |
2566 | } | |
2567 | ||
52f4fb43 N |
2568 | static struct nfs4_delegation * |
2569 | find_delegation_file(struct nfs4_file *fp, stateid_t *stid) | |
2570 | { | |
32b007b4 | 2571 | struct nfs4_delegation *dp; |
52f4fb43 | 2572 | |
acfdf5c3 | 2573 | spin_lock(&recall_lock); |
32b007b4 BF |
2574 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) |
2575 | if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) { | |
2576 | spin_unlock(&recall_lock); | |
2577 | return dp; | |
2578 | } | |
acfdf5c3 | 2579 | spin_unlock(&recall_lock); |
32b007b4 | 2580 | return NULL; |
52f4fb43 N |
2581 | } |
2582 | ||
c47d832b | 2583 | static int share_access_to_flags(u32 share_access) |
24a0111e BF |
2584 | { |
2585 | share_access &= ~NFS4_SHARE_WANT_MASK; | |
2586 | ||
2587 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; | |
2588 | } | |
2589 | ||
b37ad28b | 2590 | static __be32 |
567d9829 N |
2591 | nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, |
2592 | struct nfs4_delegation **dp) | |
2593 | { | |
2594 | int flags; | |
b37ad28b | 2595 | __be32 status = nfserr_bad_stateid; |
567d9829 N |
2596 | |
2597 | *dp = find_delegation_file(fp, &open->op_delegate_stateid); | |
2598 | if (*dp == NULL) | |
c44c5eeb | 2599 | goto out; |
24a0111e | 2600 | flags = share_access_to_flags(open->op_share_access); |
567d9829 N |
2601 | status = nfs4_check_delegmode(*dp, flags); |
2602 | if (status) | |
2603 | *dp = NULL; | |
c44c5eeb N |
2604 | out: |
2605 | if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2606 | return nfs_ok; | |
2607 | if (status) | |
2608 | return status; | |
fe0750e5 | 2609 | open->op_openowner->oo_confirmed = 1; |
c44c5eeb | 2610 | return nfs_ok; |
567d9829 N |
2611 | } |
2612 | ||
b37ad28b | 2613 | static __be32 |
dcef0413 | 2614 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp) |
1da177e4 | 2615 | { |
dcef0413 | 2616 | struct nfs4_ol_stateid *local; |
fe0750e5 | 2617 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 2618 | |
8beefa24 | 2619 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
2620 | /* ignore lock owners */ |
2621 | if (local->st_stateowner->so_is_open_owner == 0) | |
2622 | continue; | |
2623 | /* remember if we have seen this open owner */ | |
fe0750e5 | 2624 | if (local->st_stateowner == &oo->oo_owner) |
1da177e4 LT |
2625 | *stpp = local; |
2626 | /* check for conflicting share reservations */ | |
2627 | if (!test_share(local, open)) | |
77eaae8d | 2628 | return nfserr_share_denied; |
1da177e4 | 2629 | } |
77eaae8d | 2630 | return nfs_ok; |
1da177e4 LT |
2631 | } |
2632 | ||
dcef0413 | 2633 | static inline struct nfs4_ol_stateid * |
5ac049ac N |
2634 | nfs4_alloc_stateid(void) |
2635 | { | |
2636 | return kmem_cache_alloc(stateid_slab, GFP_KERNEL); | |
2637 | } | |
2638 | ||
21fb4016 BF |
2639 | static inline int nfs4_access_to_access(u32 nfs4_access) |
2640 | { | |
2641 | int flags = 0; | |
2642 | ||
2643 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
2644 | flags |= NFSD_MAY_READ; | |
2645 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
2646 | flags |= NFSD_MAY_WRITE; | |
2647 | return flags; | |
2648 | } | |
2649 | ||
0c12eaff CB |
2650 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
2651 | struct svc_fh *cur_fh, struct nfsd4_open *open) | |
f9d7562f BF |
2652 | { |
2653 | __be32 status; | |
0c12eaff CB |
2654 | int oflag = nfs4_access_to_omode(open->op_share_access); |
2655 | int access = nfs4_access_to_access(open->op_share_access); | |
2656 | ||
2657 | /* CLAIM_DELEGATE_CUR is used in response to a broken lease; | |
2658 | * allowing it to break the lease and return EAGAIN leaves the | |
2659 | * client unable to make progress in returning the delegation */ | |
2660 | if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2661 | access |= NFSD_MAY_NOT_BREAK_LEASE; | |
f9d7562f BF |
2662 | |
2663 | if (!fp->fi_fds[oflag]) { | |
2664 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, | |
2665 | &fp->fi_fds[oflag]); | |
f9d7562f BF |
2666 | if (status) |
2667 | return status; | |
2668 | } | |
2669 | nfs4_file_get_access(fp, oflag); | |
2670 | ||
2671 | return nfs_ok; | |
2672 | } | |
2673 | ||
b37ad28b | 2674 | static __be32 |
dcef0413 | 2675 | nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_ol_stateid **stpp, |
f9d7562f BF |
2676 | struct nfs4_file *fp, struct svc_fh *cur_fh, |
2677 | struct nfsd4_open *open) | |
1da177e4 | 2678 | { |
dcef0413 | 2679 | struct nfs4_ol_stateid *stp; |
f9d7562f | 2680 | __be32 status; |
1da177e4 | 2681 | |
5ac049ac | 2682 | stp = nfs4_alloc_stateid(); |
1da177e4 | 2683 | if (stp == NULL) |
3e772463 | 2684 | return nfserr_jukebox; |
1da177e4 | 2685 | |
0c12eaff | 2686 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); |
f9d7562f BF |
2687 | if (status) { |
2688 | kmem_cache_free(stateid_slab, stp); | |
2689 | return status; | |
1da177e4 | 2690 | } |
1da177e4 LT |
2691 | *stpp = stp; |
2692 | return 0; | |
2693 | } | |
2694 | ||
b37ad28b | 2695 | static inline __be32 |
1da177e4 LT |
2696 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
2697 | struct nfsd4_open *open) | |
2698 | { | |
2699 | struct iattr iattr = { | |
2700 | .ia_valid = ATTR_SIZE, | |
2701 | .ia_size = 0, | |
2702 | }; | |
2703 | if (!open->op_truncate) | |
2704 | return 0; | |
2705 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 2706 | return nfserr_inval; |
1da177e4 LT |
2707 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
2708 | } | |
2709 | ||
b37ad28b | 2710 | static __be32 |
dcef0413 | 2711 | 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 | 2712 | { |
7d947842 BF |
2713 | u32 op_share_access = open->op_share_access & ~NFS4_SHARE_WANT_MASK; |
2714 | bool new_access; | |
b37ad28b | 2715 | __be32 status; |
1da177e4 | 2716 | |
7d947842 | 2717 | new_access = !test_bit(op_share_access, &stp->st_access_bmap); |
f9d7562f | 2718 | if (new_access) { |
0c12eaff | 2719 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); |
f9d7562f BF |
2720 | if (status) |
2721 | return status; | |
6c26d08f | 2722 | } |
1da177e4 LT |
2723 | status = nfsd4_truncate(rqstp, cur_fh, open); |
2724 | if (status) { | |
f9d7562f | 2725 | if (new_access) { |
f197c271 | 2726 | int oflag = nfs4_access_to_omode(op_share_access); |
f9d7562f BF |
2727 | nfs4_file_put_access(fp, oflag); |
2728 | } | |
1da177e4 LT |
2729 | return status; |
2730 | } | |
2731 | /* remember the open */ | |
24a0111e | 2732 | __set_bit(op_share_access, &stp->st_access_bmap); |
b55e0ba1 | 2733 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
1da177e4 LT |
2734 | |
2735 | return nfs_ok; | |
2736 | } | |
2737 | ||
2738 | ||
1da177e4 | 2739 | static void |
37515177 | 2740 | nfs4_set_claim_prev(struct nfsd4_open *open) |
1da177e4 | 2741 | { |
fe0750e5 BF |
2742 | open->op_openowner->oo_confirmed = 1; |
2743 | open->op_openowner->oo_owner.so_client->cl_firststate = 1; | |
1da177e4 LT |
2744 | } |
2745 | ||
14a24e99 BF |
2746 | /* Should we give out recallable state?: */ |
2747 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
2748 | { | |
2749 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
2750 | return true; | |
2751 | /* | |
2752 | * In the sessions case, since we don't have to establish a | |
2753 | * separate connection for callbacks, we assume it's OK | |
2754 | * until we hear otherwise: | |
2755 | */ | |
2756 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
2757 | } | |
2758 | ||
22d38c4c BF |
2759 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) |
2760 | { | |
2761 | struct file_lock *fl; | |
2762 | ||
2763 | fl = locks_alloc_lock(); | |
2764 | if (!fl) | |
2765 | return NULL; | |
2766 | locks_init_lock(fl); | |
2767 | fl->fl_lmops = &nfsd_lease_mng_ops; | |
2768 | fl->fl_flags = FL_LEASE; | |
2769 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; | |
2770 | fl->fl_end = OFFSET_MAX; | |
acfdf5c3 | 2771 | fl->fl_owner = (fl_owner_t)(dp->dl_file); |
22d38c4c | 2772 | fl->fl_pid = current->tgid; |
22d38c4c BF |
2773 | return fl; |
2774 | } | |
2775 | ||
edab9782 BF |
2776 | static int nfs4_setlease(struct nfs4_delegation *dp, int flag) |
2777 | { | |
acfdf5c3 | 2778 | struct nfs4_file *fp = dp->dl_file; |
edab9782 BF |
2779 | struct file_lock *fl; |
2780 | int status; | |
2781 | ||
2782 | fl = nfs4_alloc_init_lease(dp, flag); | |
2783 | if (!fl) | |
2784 | return -ENOMEM; | |
acfdf5c3 BF |
2785 | fl->fl_file = find_readable_file(fp); |
2786 | list_add(&dp->dl_perclnt, &dp->dl_client->cl_delegations); | |
2787 | status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); | |
edab9782 | 2788 | if (status) { |
acfdf5c3 | 2789 | list_del_init(&dp->dl_perclnt); |
edab9782 BF |
2790 | locks_free_lock(fl); |
2791 | return -ENOMEM; | |
2792 | } | |
acfdf5c3 BF |
2793 | fp->fi_lease = fl; |
2794 | fp->fi_deleg_file = fl->fl_file; | |
2795 | get_file(fp->fi_deleg_file); | |
2796 | atomic_set(&fp->fi_delegees, 1); | |
2797 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2798 | return 0; | |
2799 | } | |
2800 | ||
2801 | static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag) | |
2802 | { | |
2803 | struct nfs4_file *fp = dp->dl_file; | |
2804 | ||
2805 | if (!fp->fi_lease) | |
2806 | return nfs4_setlease(dp, flag); | |
2807 | spin_lock(&recall_lock); | |
2808 | if (fp->fi_had_conflict) { | |
2809 | spin_unlock(&recall_lock); | |
2810 | return -EAGAIN; | |
2811 | } | |
2812 | atomic_inc(&fp->fi_delegees); | |
2813 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2814 | spin_unlock(&recall_lock); | |
2815 | list_add(&dp->dl_perclnt, &dp->dl_client->cl_delegations); | |
edab9782 BF |
2816 | return 0; |
2817 | } | |
2818 | ||
1da177e4 LT |
2819 | /* |
2820 | * Attempt to hand out a delegation. | |
2821 | */ | |
2822 | static void | |
dcef0413 | 2823 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_ol_stateid *stp) |
1da177e4 LT |
2824 | { |
2825 | struct nfs4_delegation *dp; | |
fe0750e5 | 2826 | struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner); |
14a24e99 | 2827 | int cb_up; |
1da177e4 LT |
2828 | int status, flag = 0; |
2829 | ||
fe0750e5 | 2830 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
1da177e4 | 2831 | flag = NFS4_OPEN_DELEGATE_NONE; |
7b190fec N |
2832 | open->op_recall = 0; |
2833 | switch (open->op_claim_type) { | |
2834 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 2835 | if (!cb_up) |
7b190fec N |
2836 | open->op_recall = 1; |
2837 | flag = open->op_delegate_type; | |
2838 | if (flag == NFS4_OPEN_DELEGATE_NONE) | |
2839 | goto out; | |
2840 | break; | |
2841 | case NFS4_OPEN_CLAIM_NULL: | |
2842 | /* Let's not give out any delegations till everyone's | |
2843 | * had the chance to reclaim theirs.... */ | |
af558e33 | 2844 | if (locks_in_grace()) |
7b190fec | 2845 | goto out; |
fe0750e5 | 2846 | if (!cb_up || !oo->oo_confirmed) |
7b190fec N |
2847 | goto out; |
2848 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | |
2849 | flag = NFS4_OPEN_DELEGATE_WRITE; | |
2850 | else | |
2851 | flag = NFS4_OPEN_DELEGATE_READ; | |
2852 | break; | |
2853 | default: | |
2854 | goto out; | |
2855 | } | |
1da177e4 | 2856 | |
fe0750e5 | 2857 | dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh, flag); |
dd239cc0 BF |
2858 | if (dp == NULL) |
2859 | goto out_no_deleg; | |
acfdf5c3 | 2860 | status = nfs4_set_delegation(dp, flag); |
edab9782 | 2861 | if (status) |
dd239cc0 | 2862 | goto out_free; |
1da177e4 LT |
2863 | |
2864 | memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); | |
2865 | ||
8c10cbdb BH |
2866 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
2867 | STATEID_VAL(&dp->dl_stateid)); | |
1da177e4 | 2868 | out: |
7b190fec N |
2869 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS |
2870 | && flag == NFS4_OPEN_DELEGATE_NONE | |
2871 | && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) | |
2fdada03 | 2872 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
1da177e4 | 2873 | open->op_delegate_type = flag; |
dd239cc0 BF |
2874 | return; |
2875 | out_free: | |
acfdf5c3 | 2876 | nfs4_put_delegation(dp); |
dd239cc0 BF |
2877 | out_no_deleg: |
2878 | flag = NFS4_OPEN_DELEGATE_NONE; | |
2879 | goto out; | |
1da177e4 LT |
2880 | } |
2881 | ||
2882 | /* | |
2883 | * called with nfs4_lock_state() held. | |
2884 | */ | |
b37ad28b | 2885 | __be32 |
1da177e4 LT |
2886 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
2887 | { | |
6668958f | 2888 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
1da177e4 LT |
2889 | struct nfs4_file *fp = NULL; |
2890 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
dcef0413 | 2891 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 2892 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 2893 | __be32 status; |
1da177e4 LT |
2894 | |
2895 | status = nfserr_inval; | |
d87a8ade | 2896 | if (!access_valid(open->op_share_access, resp->cstate.minorversion) |
ba5a6a19 | 2897 | || !deny_valid(open->op_share_deny)) |
1da177e4 LT |
2898 | goto out; |
2899 | /* | |
2900 | * Lookup file; if found, lookup stateid and check open request, | |
2901 | * and check for delegations in the process of being recalled. | |
2902 | * If not found, create the nfs4_file struct | |
2903 | */ | |
2904 | fp = find_file(ino); | |
2905 | if (fp) { | |
2906 | if ((status = nfs4_check_open(fp, open, &stp))) | |
2907 | goto out; | |
c44c5eeb N |
2908 | status = nfs4_check_deleg(fp, open, &dp); |
2909 | if (status) | |
2910 | goto out; | |
1da177e4 | 2911 | } else { |
c44c5eeb N |
2912 | status = nfserr_bad_stateid; |
2913 | if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2914 | goto out; | |
3e772463 | 2915 | status = nfserr_jukebox; |
1da177e4 LT |
2916 | fp = alloc_init_file(ino); |
2917 | if (fp == NULL) | |
2918 | goto out; | |
2919 | } | |
2920 | ||
2921 | /* | |
2922 | * OPEN the file, or upgrade an existing OPEN. | |
2923 | * If truncate fails, the OPEN fails. | |
2924 | */ | |
2925 | if (stp) { | |
2926 | /* Stateid was found, this is an OPEN upgrade */ | |
f9d7562f | 2927 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
1da177e4 LT |
2928 | if (status) |
2929 | goto out; | |
2930 | } else { | |
f9d7562f | 2931 | status = nfs4_new_open(rqstp, &stp, fp, current_fh, open); |
567d9829 | 2932 | if (status) |
1da177e4 | 2933 | goto out; |
881ea2b1 | 2934 | init_open_stateid(stp, fp, open); |
1da177e4 LT |
2935 | status = nfsd4_truncate(rqstp, current_fh, open); |
2936 | if (status) { | |
2283963f | 2937 | release_open_stateid(stp); |
1da177e4 LT |
2938 | goto out; |
2939 | } | |
2940 | } | |
dcef0413 BF |
2941 | update_stateid(&stp->st_stid.sc_stateid); |
2942 | memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 2943 | |
4dc6ec00 | 2944 | if (nfsd4_has_session(&resp->cstate)) |
fe0750e5 | 2945 | open->op_openowner->oo_confirmed = 1; |
6668958f | 2946 | |
1da177e4 LT |
2947 | /* |
2948 | * Attempt to hand out a delegation. No error return, because the | |
2949 | * OPEN succeeds even if we fail. | |
2950 | */ | |
2951 | nfs4_open_delegation(current_fh, open, stp); | |
2952 | ||
2953 | status = nfs_ok; | |
2954 | ||
8c10cbdb | 2955 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
dcef0413 | 2956 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
1da177e4 | 2957 | out: |
13cd2184 N |
2958 | if (fp) |
2959 | put_nfs4_file(fp); | |
37515177 N |
2960 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
2961 | nfs4_set_claim_prev(open); | |
1da177e4 LT |
2962 | /* |
2963 | * To finish the open response, we just need to set the rflags. | |
2964 | */ | |
2965 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
fe0750e5 | 2966 | if (!open->op_openowner->oo_confirmed && |
6668958f | 2967 | !nfsd4_has_session(&resp->cstate)) |
1da177e4 LT |
2968 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
2969 | ||
2970 | return status; | |
2971 | } | |
2972 | ||
b37ad28b | 2973 | __be32 |
b591480b BF |
2974 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2975 | clientid_t *clid) | |
1da177e4 LT |
2976 | { |
2977 | struct nfs4_client *clp; | |
b37ad28b | 2978 | __be32 status; |
1da177e4 LT |
2979 | |
2980 | nfs4_lock_state(); | |
2981 | dprintk("process_renew(%08x/%08x): starting\n", | |
2982 | clid->cl_boot, clid->cl_id); | |
2983 | status = nfserr_stale_clientid; | |
2984 | if (STALE_CLIENTID(clid)) | |
2985 | goto out; | |
2986 | clp = find_confirmed_client(clid); | |
2987 | status = nfserr_expired; | |
2988 | if (clp == NULL) { | |
2989 | /* We assume the client took too long to RENEW. */ | |
2990 | dprintk("nfsd4_renew: clientid not found!\n"); | |
2991 | goto out; | |
2992 | } | |
2993 | renew_client(clp); | |
2994 | status = nfserr_cb_path_down; | |
ea1da636 | 2995 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 2996 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
2997 | goto out; |
2998 | status = nfs_ok; | |
2999 | out: | |
3000 | nfs4_unlock_state(); | |
3001 | return status; | |
3002 | } | |
3003 | ||
c47d832b | 3004 | static struct lock_manager nfsd4_manager = { |
af558e33 BF |
3005 | }; |
3006 | ||
a76b4319 | 3007 | static void |
af558e33 | 3008 | nfsd4_end_grace(void) |
a76b4319 N |
3009 | { |
3010 | dprintk("NFSD: end of grace period\n"); | |
c7b9a459 | 3011 | nfsd4_recdir_purge_old(); |
af558e33 | 3012 | locks_end_grace(&nfsd4_manager); |
e46b498c BF |
3013 | /* |
3014 | * Now that every NFSv4 client has had the chance to recover and | |
3015 | * to see the (possibly new, possibly shorter) lease time, we | |
3016 | * can safely set the next grace time to the current lease time: | |
3017 | */ | |
3018 | nfsd4_grace = nfsd4_lease; | |
a76b4319 N |
3019 | } |
3020 | ||
fd39ca9a | 3021 | static time_t |
1da177e4 LT |
3022 | nfs4_laundromat(void) |
3023 | { | |
3024 | struct nfs4_client *clp; | |
fe0750e5 | 3025 | struct nfs4_openowner *oo; |
1da177e4 LT |
3026 | struct nfs4_delegation *dp; |
3027 | struct list_head *pos, *next, reaplist; | |
cf07d2ea BF |
3028 | time_t cutoff = get_seconds() - nfsd4_lease; |
3029 | time_t t, clientid_val = nfsd4_lease; | |
3030 | time_t u, test_val = nfsd4_lease; | |
1da177e4 LT |
3031 | |
3032 | nfs4_lock_state(); | |
3033 | ||
3034 | dprintk("NFSD: laundromat service - starting\n"); | |
af558e33 BF |
3035 | if (locks_in_grace()) |
3036 | nfsd4_end_grace(); | |
36acb66b BH |
3037 | INIT_LIST_HEAD(&reaplist); |
3038 | spin_lock(&client_lock); | |
1da177e4 LT |
3039 | list_for_each_safe(pos, next, &client_lru) { |
3040 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
3041 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
3042 | t = clp->cl_time - cutoff; | |
3043 | if (clientid_val > t) | |
3044 | clientid_val = t; | |
3045 | break; | |
3046 | } | |
d7682988 BH |
3047 | if (atomic_read(&clp->cl_refcount)) { |
3048 | dprintk("NFSD: client in use (clientid %08x)\n", | |
3049 | clp->cl_clientid.cl_id); | |
3050 | continue; | |
3051 | } | |
3052 | unhash_client_locked(clp); | |
3053 | list_add(&clp->cl_lru, &reaplist); | |
36acb66b BH |
3054 | } |
3055 | spin_unlock(&client_lock); | |
3056 | list_for_each_safe(pos, next, &reaplist) { | |
3057 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
3058 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
3059 | clp->cl_clientid.cl_id); | |
c7b9a459 | 3060 | nfsd4_remove_clid_dir(clp); |
1da177e4 LT |
3061 | expire_client(clp); |
3062 | } | |
1da177e4 LT |
3063 | spin_lock(&recall_lock); |
3064 | list_for_each_safe(pos, next, &del_recall_lru) { | |
3065 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3066 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
3067 | u = dp->dl_time - cutoff; | |
3068 | if (test_val > u) | |
3069 | test_val = u; | |
3070 | break; | |
3071 | } | |
1da177e4 LT |
3072 | list_move(&dp->dl_recall_lru, &reaplist); |
3073 | } | |
3074 | spin_unlock(&recall_lock); | |
3075 | list_for_each_safe(pos, next, &reaplist) { | |
3076 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3077 | list_del_init(&dp->dl_recall_lru); | |
3078 | unhash_delegation(dp); | |
3079 | } | |
cf07d2ea | 3080 | test_val = nfsd4_lease; |
1da177e4 | 3081 | list_for_each_safe(pos, next, &close_lru) { |
fe0750e5 BF |
3082 | oo = container_of(pos, struct nfs4_openowner, oo_close_lru); |
3083 | if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { | |
3084 | u = oo->oo_time - cutoff; | |
1da177e4 LT |
3085 | if (test_val > u) |
3086 | test_val = u; | |
3087 | break; | |
3088 | } | |
3089 | dprintk("NFSD: purging unused open stateowner (so_id %d)\n", | |
fe0750e5 BF |
3090 | oo->oo_owner.so_id); |
3091 | release_openowner(oo); | |
1da177e4 LT |
3092 | } |
3093 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
3094 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
3095 | nfs4_unlock_state(); | |
3096 | return clientid_val; | |
3097 | } | |
3098 | ||
a254b246 HH |
3099 | static struct workqueue_struct *laundry_wq; |
3100 | static void laundromat_main(struct work_struct *); | |
3101 | static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); | |
3102 | ||
3103 | static void | |
c4028958 | 3104 | laundromat_main(struct work_struct *not_used) |
1da177e4 LT |
3105 | { |
3106 | time_t t; | |
3107 | ||
3108 | t = nfs4_laundromat(); | |
3109 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); | |
58da282b | 3110 | queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); |
1da177e4 LT |
3111 | } |
3112 | ||
fe0750e5 | 3113 | static struct nfs4_openowner * search_close_lru(u32 st_id) |
f8816512 | 3114 | { |
fe0750e5 | 3115 | struct nfs4_openowner *local; |
1da177e4 | 3116 | |
fe0750e5 BF |
3117 | list_for_each_entry(local, &close_lru, oo_close_lru) { |
3118 | if (local->oo_owner.so_id == st_id) | |
f4dee24c | 3119 | return local; |
1da177e4 LT |
3120 | } |
3121 | return NULL; | |
3122 | } | |
3123 | ||
3124 | static inline int | |
dcef0413 | 3125 | nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) |
1da177e4 | 3126 | { |
f9d7562f | 3127 | return fhp->fh_dentry->d_inode != stp->st_file->fi_inode; |
1da177e4 LT |
3128 | } |
3129 | ||
3130 | static int | |
3131 | STALE_STATEID(stateid_t *stateid) | |
3132 | { | |
e4e83ea4 BF |
3133 | if (stateid->si_boot == boot_time) |
3134 | return 0; | |
3135 | dprintk("NFSD: stale stateid " STATEID_FMT "!\n", | |
8c10cbdb | 3136 | STATEID_VAL(stateid)); |
e4e83ea4 | 3137 | return 1; |
1da177e4 LT |
3138 | } |
3139 | ||
3140 | static inline int | |
3141 | access_permit_read(unsigned long access_bmap) | |
3142 | { | |
3143 | return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || | |
3144 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || | |
3145 | test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); | |
3146 | } | |
3147 | ||
3148 | static inline int | |
3149 | access_permit_write(unsigned long access_bmap) | |
3150 | { | |
3151 | return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || | |
3152 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); | |
3153 | } | |
3154 | ||
3155 | static | |
dcef0413 | 3156 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
1da177e4 | 3157 | { |
b37ad28b | 3158 | __be32 status = nfserr_openmode; |
1da177e4 | 3159 | |
02921914 BF |
3160 | /* For lock stateid's, we test the parent open, not the lock: */ |
3161 | if (stp->st_openstp) | |
3162 | stp = stp->st_openstp; | |
1da177e4 LT |
3163 | if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) |
3164 | goto out; | |
3165 | if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) | |
3166 | goto out; | |
3167 | status = nfs_ok; | |
3168 | out: | |
3169 | return status; | |
3170 | } | |
3171 | ||
b37ad28b | 3172 | static inline __be32 |
1da177e4 LT |
3173 | check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) |
3174 | { | |
203a8c8e | 3175 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 3176 | return nfs_ok; |
af558e33 | 3177 | else if (locks_in_grace()) { |
25985edc | 3178 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
3179 | * conflicting state; so we must wait out the grace period. */ |
3180 | return nfserr_grace; | |
3181 | } else if (flags & WR_STATE) | |
3182 | return nfs4_share_conflict(current_fh, | |
3183 | NFS4_SHARE_DENY_WRITE); | |
3184 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
3185 | return nfs4_share_conflict(current_fh, | |
3186 | NFS4_SHARE_DENY_READ); | |
3187 | } | |
3188 | ||
3189 | /* | |
3190 | * Allow READ/WRITE during grace period on recovered state only for files | |
3191 | * that are not able to provide mandatory locking. | |
3192 | */ | |
3193 | static inline int | |
18f82731 | 3194 | grace_disallows_io(struct inode *inode) |
1da177e4 | 3195 | { |
203a8c8e | 3196 | return locks_in_grace() && mandatory_lock(inode); |
1da177e4 LT |
3197 | } |
3198 | ||
81b82965 BF |
3199 | /* Returns true iff a is later than b: */ |
3200 | static bool stateid_generation_after(stateid_t *a, stateid_t *b) | |
3201 | { | |
3202 | return (s32)a->si_generation - (s32)b->si_generation > 0; | |
3203 | } | |
3204 | ||
28dde241 | 3205 | static int check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 3206 | { |
6668958f AA |
3207 | /* |
3208 | * When sessions are used the stateid generation number is ignored | |
3209 | * when it is zero. | |
3210 | */ | |
28dde241 | 3211 | if (has_session && in->si_generation == 0) |
81b82965 BF |
3212 | return nfs_ok; |
3213 | ||
3214 | if (in->si_generation == ref->si_generation) | |
3215 | return nfs_ok; | |
6668958f | 3216 | |
0836f587 | 3217 | /* If the client sends us a stateid from the future, it's buggy: */ |
81b82965 | 3218 | if (stateid_generation_after(in, ref)) |
0836f587 BF |
3219 | return nfserr_bad_stateid; |
3220 | /* | |
81b82965 BF |
3221 | * However, we could see a stateid from the past, even from a |
3222 | * non-buggy client. For example, if the client sends a lock | |
3223 | * while some IO is outstanding, the lock may bump si_generation | |
3224 | * while the IO is still in flight. The client could avoid that | |
3225 | * situation by waiting for responses on all the IO requests, | |
3226 | * but better performance may result in retrying IO that | |
3227 | * receives an old_stateid error if requests are rarely | |
3228 | * reordered in flight: | |
0836f587 | 3229 | */ |
81b82965 | 3230 | return nfserr_old_stateid; |
0836f587 BF |
3231 | } |
3232 | ||
3e633079 BF |
3233 | static int is_delegation_stateid(stateid_t *stateid) |
3234 | { | |
3235 | return stateid->si_fileid == 0; | |
3236 | } | |
3237 | ||
28dde241 | 3238 | __be32 nfs4_validate_stateid(stateid_t *stateid, bool has_session) |
17456804 | 3239 | { |
dcef0413 | 3240 | struct nfs4_ol_stateid *stp = NULL; |
17456804 BS |
3241 | __be32 status = nfserr_stale_stateid; |
3242 | ||
3243 | if (STALE_STATEID(stateid)) | |
3244 | goto out; | |
3245 | ||
3246 | status = nfserr_expired; | |
4d71ab87 | 3247 | stp = find_stateid(stateid); |
17456804 BS |
3248 | if (!stp) |
3249 | goto out; | |
3250 | status = nfserr_bad_stateid; | |
fe0750e5 BF |
3251 | if (stp->st_stateowner->so_is_open_owner |
3252 | && !openowner(stp->st_stateowner)->oo_confirmed) | |
17456804 BS |
3253 | goto out; |
3254 | ||
dcef0413 | 3255 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, has_session); |
17456804 BS |
3256 | if (status) |
3257 | goto out; | |
3258 | ||
3259 | status = nfs_ok; | |
3260 | out: | |
3261 | return status; | |
3262 | } | |
3263 | ||
1da177e4 LT |
3264 | /* |
3265 | * Checks for stateid operations | |
3266 | */ | |
b37ad28b | 3267 | __be32 |
dd453dfd BH |
3268 | nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, |
3269 | stateid_t *stateid, int flags, struct file **filpp) | |
1da177e4 | 3270 | { |
dcef0413 | 3271 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 3272 | struct nfs4_delegation *dp = NULL; |
dd453dfd | 3273 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 3274 | struct inode *ino = current_fh->fh_dentry->d_inode; |
b37ad28b | 3275 | __be32 status; |
1da177e4 | 3276 | |
1da177e4 LT |
3277 | if (filpp) |
3278 | *filpp = NULL; | |
3279 | ||
18f82731 | 3280 | if (grace_disallows_io(ino)) |
1da177e4 LT |
3281 | return nfserr_grace; |
3282 | ||
3283 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3284 | return check_special_stateids(current_fh, stateid, flags); | |
3285 | ||
1da177e4 LT |
3286 | status = nfserr_stale_stateid; |
3287 | if (STALE_STATEID(stateid)) | |
3288 | goto out; | |
3289 | ||
33515142 BF |
3290 | /* |
3291 | * We assume that any stateid that has the current boot time, | |
3292 | * but that we can't find, is expired: | |
3293 | */ | |
3294 | status = nfserr_expired; | |
3e633079 | 3295 | if (is_delegation_stateid(stateid)) { |
a4455be0 | 3296 | dp = find_delegation_stateid(ino, stateid); |
e4e83ea4 | 3297 | if (!dp) |
1da177e4 | 3298 | goto out; |
28dde241 | 3299 | status = check_stateid_generation(stateid, &dp->dl_stateid, nfsd4_has_session(cstate)); |
0c2a498f BF |
3300 | if (status) |
3301 | goto out; | |
dc9bf700 BF |
3302 | status = nfs4_check_delegmode(dp, flags); |
3303 | if (status) | |
3304 | goto out; | |
3305 | renew_client(dp->dl_client); | |
43b0178e | 3306 | if (filpp) { |
acfdf5c3 | 3307 | *filpp = dp->dl_file->fi_deleg_file; |
43b0178e DC |
3308 | BUG_ON(!*filpp); |
3309 | } | |
1da177e4 | 3310 | } else { /* open or lock stateid */ |
4d71ab87 | 3311 | stp = find_stateid(stateid); |
e4e83ea4 | 3312 | if (!stp) |
1da177e4 | 3313 | goto out; |
33515142 | 3314 | status = nfserr_bad_stateid; |
6150ef0d | 3315 | if (nfs4_check_fh(current_fh, stp)) |
1da177e4 | 3316 | goto out; |
fe0750e5 BF |
3317 | if (stp->st_stateowner->so_is_open_owner |
3318 | && !openowner(stp->st_stateowner)->oo_confirmed) | |
1da177e4 | 3319 | goto out; |
dcef0413 | 3320 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, |
28dde241 | 3321 | nfsd4_has_session(cstate)); |
0c2a498f BF |
3322 | if (status) |
3323 | goto out; | |
a4455be0 BF |
3324 | status = nfs4_check_openmode(stp, flags); |
3325 | if (status) | |
1da177e4 LT |
3326 | goto out; |
3327 | renew_client(stp->st_stateowner->so_client); | |
f9d7562f BF |
3328 | if (filpp) { |
3329 | if (flags & RD_STATE) | |
3330 | *filpp = find_readable_file(stp->st_file); | |
3331 | else | |
3332 | *filpp = find_writeable_file(stp->st_file); | |
f9d7562f | 3333 | } |
1da177e4 LT |
3334 | } |
3335 | status = nfs_ok; | |
3336 | out: | |
3337 | return status; | |
3338 | } | |
3339 | ||
e1ca12df BS |
3340 | static __be32 |
3341 | nfsd4_free_delegation_stateid(stateid_t *stateid) | |
3342 | { | |
3343 | struct nfs4_delegation *dp = search_for_delegation(stateid); | |
3344 | if (dp) | |
3345 | return nfserr_locks_held; | |
3346 | return nfserr_bad_stateid; | |
3347 | } | |
3348 | ||
3349 | static __be32 | |
dcef0413 | 3350 | nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) |
e1ca12df | 3351 | { |
fe0750e5 | 3352 | if (check_for_locks(stp->st_file, lockowner(stp->st_stateowner))) |
e1ca12df BS |
3353 | return nfserr_locks_held; |
3354 | release_lock_stateid(stp); | |
3355 | return nfs_ok; | |
3356 | } | |
3357 | ||
17456804 BS |
3358 | /* |
3359 | * Test if the stateid is valid | |
3360 | */ | |
3361 | __be32 | |
3362 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3363 | struct nfsd4_test_stateid *test_stateid) | |
3364 | { | |
3365 | test_stateid->ts_has_session = nfsd4_has_session(cstate); | |
3366 | return nfs_ok; | |
3367 | } | |
3368 | ||
e1ca12df BS |
3369 | /* |
3370 | * Free a state id | |
3371 | */ | |
3372 | __be32 | |
3373 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3374 | struct nfsd4_free_stateid *free_stateid) | |
3375 | { | |
3376 | stateid_t *stateid = &free_stateid->fr_stateid; | |
dcef0413 | 3377 | struct nfs4_ol_stateid *stp; |
e1ca12df BS |
3378 | __be32 ret; |
3379 | ||
3380 | nfs4_lock_state(); | |
3381 | if (is_delegation_stateid(stateid)) { | |
3382 | ret = nfsd4_free_delegation_stateid(stateid); | |
3383 | goto out; | |
3384 | } | |
3385 | ||
4d71ab87 | 3386 | stp = find_stateid(stateid); |
e1ca12df BS |
3387 | if (!stp) { |
3388 | ret = nfserr_bad_stateid; | |
3389 | goto out; | |
3390 | } | |
dcef0413 | 3391 | ret = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, 1); |
81b82965 BF |
3392 | if (ret) |
3393 | goto out; | |
e1ca12df | 3394 | |
dcef0413 | 3395 | if (stp->st_stid.sc_type == NFS4_OPEN_STID) { |
e1ca12df BS |
3396 | ret = nfserr_locks_held; |
3397 | goto out; | |
3398 | } else { | |
3399 | ret = nfsd4_free_lock_stateid(stp); | |
3400 | goto out; | |
3401 | } | |
3402 | ||
3403 | out: | |
3404 | nfs4_unlock_state(); | |
3405 | return ret; | |
3406 | } | |
3407 | ||
4c4cd222 N |
3408 | static inline int |
3409 | setlkflg (int type) | |
3410 | { | |
3411 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
3412 | RD_STATE : WR_STATE; | |
3413 | } | |
1da177e4 | 3414 | |
c0a5d93e BF |
3415 | static __be32 nfs4_nospecial_stateid_checks(stateid_t *stateid) |
3416 | { | |
3417 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3418 | return nfserr_bad_stateid; | |
3419 | if (STALE_STATEID(stateid)) | |
3420 | return nfserr_stale_stateid; | |
3421 | return nfs_ok; | |
3422 | } | |
3423 | ||
dcef0413 | 3424 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
c0a5d93e BF |
3425 | { |
3426 | struct svc_fh *current_fh = &cstate->current_fh; | |
3427 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
3428 | __be32 status; | |
3429 | ||
3430 | if (nfs4_check_fh(current_fh, stp)) | |
3431 | return nfserr_bad_stateid; | |
3432 | status = nfsd4_check_seqid(cstate, sop, seqid); | |
3433 | if (status) | |
3434 | return status; | |
dcef0413 | 3435 | return check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); |
c0a5d93e BF |
3436 | } |
3437 | ||
1da177e4 LT |
3438 | /* |
3439 | * Checks for sequence id mutating operations. | |
3440 | */ | |
b37ad28b | 3441 | static __be32 |
dd453dfd | 3442 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2288d0e3 | 3443 | stateid_t *stateid, char typemask, |
dcef0413 | 3444 | struct nfs4_ol_stateid **stpp) |
1da177e4 | 3445 | { |
0836f587 | 3446 | __be32 status; |
1da177e4 | 3447 | |
8c10cbdb BH |
3448 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
3449 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 3450 | |
1da177e4 | 3451 | *stpp = NULL; |
c0a5d93e BF |
3452 | status = nfs4_nospecial_stateid_checks(stateid); |
3453 | if (status) | |
3454 | return status; | |
2288d0e3 | 3455 | *stpp = find_stateid_by_type(stateid, typemask); |
f4dee24c BF |
3456 | if (*stpp == NULL) |
3457 | return nfserr_expired; | |
c0a5d93e BF |
3458 | cstate->replay_owner = (*stpp)->st_stateowner; |
3459 | renew_client((*stpp)->st_stateowner->so_client); | |
1da177e4 | 3460 | |
c0a5d93e BF |
3461 | return nfs4_seqid_op_checks(cstate, stateid, seqid, *stpp); |
3462 | } | |
39325bd0 | 3463 | |
dcef0413 | 3464 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, stateid_t *stateid, struct nfs4_ol_stateid **stpp) |
c0a5d93e BF |
3465 | { |
3466 | __be32 status; | |
3467 | struct nfs4_openowner *oo; | |
1da177e4 | 3468 | |
c0a5d93e | 3469 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
2288d0e3 | 3470 | NFS4_OPEN_STID, stpp); |
7a8711c9 BF |
3471 | if (status) |
3472 | return status; | |
c0a5d93e BF |
3473 | oo = openowner((*stpp)->st_stateowner); |
3474 | if (!oo->oo_confirmed) | |
3a4f98bb | 3475 | return nfserr_bad_stateid; |
3a4f98bb | 3476 | return nfs_ok; |
1da177e4 LT |
3477 | } |
3478 | ||
b37ad28b | 3479 | __be32 |
ca364317 | 3480 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3481 | struct nfsd4_open_confirm *oc) |
1da177e4 | 3482 | { |
b37ad28b | 3483 | __be32 status; |
fe0750e5 | 3484 | struct nfs4_openowner *oo; |
dcef0413 | 3485 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
3486 | |
3487 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | |
ca364317 BF |
3488 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3489 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3490 | |
ca364317 | 3491 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
3492 | if (status) |
3493 | return status; | |
1da177e4 LT |
3494 | |
3495 | nfs4_lock_state(); | |
3496 | ||
9072d5c6 | 3497 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3498 | oc->oc_seqid, &oc->oc_req_stateid, |
2288d0e3 | 3499 | NFS4_OPEN_STID, &stp); |
9072d5c6 | 3500 | if (status) |
68b66e82 | 3501 | goto out; |
fe0750e5 | 3502 | oo = openowner(stp->st_stateowner); |
68b66e82 | 3503 | status = nfserr_bad_stateid; |
fe0750e5 | 3504 | if (oo->oo_confirmed) |
68b66e82 | 3505 | goto out; |
fe0750e5 | 3506 | oo->oo_confirmed = 1; |
dcef0413 BF |
3507 | update_stateid(&stp->st_stid.sc_stateid); |
3508 | memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
8c10cbdb | 3509 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
dcef0413 | 3510 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); |
c7b9a459 | 3511 | |
fe0750e5 | 3512 | nfsd4_create_clid_dir(oo->oo_owner.so_client); |
68b66e82 | 3513 | status = nfs_ok; |
1da177e4 | 3514 | out: |
5ec094c1 BF |
3515 | if (!cstate->replay_owner) |
3516 | nfs4_unlock_state(); | |
1da177e4 LT |
3517 | return status; |
3518 | } | |
3519 | ||
dcef0413 | 3520 | static inline void nfs4_file_downgrade(struct nfs4_ol_stateid *stp, unsigned int to_access) |
1da177e4 LT |
3521 | { |
3522 | int i; | |
f197c271 | 3523 | |
1da177e4 | 3524 | for (i = 1; i < 4; i++) { |
f197c271 BF |
3525 | if (test_bit(i, &stp->st_access_bmap) && !(i & to_access)) { |
3526 | nfs4_file_put_access(stp->st_file, i); | |
3527 | __clear_bit(i, &stp->st_access_bmap); | |
3528 | } | |
1da177e4 LT |
3529 | } |
3530 | } | |
3531 | ||
3532 | static void | |
3533 | reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) | |
3534 | { | |
3535 | int i; | |
3536 | for (i = 0; i < 4; i++) { | |
3537 | if ((i & deny) != i) | |
3538 | __clear_bit(i, bmap); | |
3539 | } | |
3540 | } | |
3541 | ||
b37ad28b | 3542 | __be32 |
ca364317 BF |
3543 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
3544 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 3545 | struct nfsd4_open_downgrade *od) |
1da177e4 | 3546 | { |
b37ad28b | 3547 | __be32 status; |
dcef0413 | 3548 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
3549 | |
3550 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | |
ca364317 BF |
3551 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3552 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3553 | |
d87a8ade | 3554 | if (!access_valid(od->od_share_access, cstate->minorversion) |
ba5a6a19 | 3555 | || !deny_valid(od->od_share_deny)) |
1da177e4 LT |
3556 | return nfserr_inval; |
3557 | ||
3558 | nfs4_lock_state(); | |
c0a5d93e BF |
3559 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
3560 | &od->od_stateid, &stp); | |
9072d5c6 | 3561 | if (status) |
1da177e4 | 3562 | goto out; |
1da177e4 LT |
3563 | status = nfserr_inval; |
3564 | if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { | |
3565 | dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
3566 | stp->st_access_bmap, od->od_share_access); | |
3567 | goto out; | |
3568 | } | |
3569 | if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { | |
3570 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", | |
3571 | stp->st_deny_bmap, od->od_share_deny); | |
3572 | goto out; | |
3573 | } | |
f197c271 | 3574 | nfs4_file_downgrade(stp, od->od_share_access); |
1da177e4 | 3575 | |
1da177e4 LT |
3576 | reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); |
3577 | ||
dcef0413 BF |
3578 | update_stateid(&stp->st_stid.sc_stateid); |
3579 | memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
3580 | status = nfs_ok; |
3581 | out: | |
5ec094c1 BF |
3582 | if (!cstate->replay_owner) |
3583 | nfs4_unlock_state(); | |
1da177e4 LT |
3584 | return status; |
3585 | } | |
3586 | ||
3587 | /* | |
3588 | * nfs4_unlock_state() called after encode | |
3589 | */ | |
b37ad28b | 3590 | __be32 |
ca364317 | 3591 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3592 | struct nfsd4_close *close) |
1da177e4 | 3593 | { |
b37ad28b | 3594 | __be32 status; |
fe0750e5 | 3595 | struct nfs4_openowner *oo; |
dcef0413 | 3596 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
3597 | |
3598 | dprintk("NFSD: nfsd4_close on file %.*s\n", | |
ca364317 BF |
3599 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3600 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 LT |
3601 | |
3602 | nfs4_lock_state(); | |
3603 | /* check close_lru for replay */ | |
c0a5d93e BF |
3604 | status = nfs4_preprocess_confirmed_seqid_op(cstate, close->cl_seqid, |
3605 | &close->cl_stateid, &stp); | |
f4dee24c BF |
3606 | if (stp == NULL && status == nfserr_expired) { |
3607 | /* | |
3608 | * Also, we should make sure this isn't just the result of | |
3609 | * a replayed close: | |
3610 | */ | |
fe0750e5 | 3611 | oo = search_close_lru(close->cl_stateid.si_stateownerid); |
f4dee24c | 3612 | /* It's not stale; let's assume it's expired: */ |
fe0750e5 | 3613 | if (oo == NULL) |
f4dee24c | 3614 | goto out; |
fe0750e5 BF |
3615 | cstate->replay_owner = &oo->oo_owner; |
3616 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, close->cl_seqid); | |
f4dee24c BF |
3617 | if (status) |
3618 | goto out; | |
3619 | status = nfserr_bad_seqid; | |
3620 | } | |
9072d5c6 | 3621 | if (status) |
1da177e4 | 3622 | goto out; |
fe0750e5 | 3623 | oo = openowner(stp->st_stateowner); |
1da177e4 | 3624 | status = nfs_ok; |
dcef0413 BF |
3625 | update_stateid(&stp->st_stid.sc_stateid); |
3626 | memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3627 | |
04ef5954 | 3628 | /* release_stateid() calls nfsd_close() if needed */ |
2283963f | 3629 | release_open_stateid(stp); |
04ef5954 BF |
3630 | |
3631 | /* place unused nfs4_stateowners on so_close_lru list to be | |
3632 | * released by the laundromat service after the lease period | |
3633 | * to enable us to handle CLOSE replay | |
3634 | */ | |
fe0750e5 BF |
3635 | if (list_empty(&oo->oo_owner.so_stateids)) |
3636 | move_to_close_lru(oo); | |
1da177e4 | 3637 | out: |
5ec094c1 BF |
3638 | if (!cstate->replay_owner) |
3639 | nfs4_unlock_state(); | |
1da177e4 LT |
3640 | return status; |
3641 | } | |
3642 | ||
b37ad28b | 3643 | __be32 |
ca364317 BF |
3644 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3645 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 3646 | { |
203a8c8e BF |
3647 | struct nfs4_delegation *dp; |
3648 | stateid_t *stateid = &dr->dr_stateid; | |
3649 | struct inode *inode; | |
b37ad28b | 3650 | __be32 status; |
1da177e4 | 3651 | |
ca364317 | 3652 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e BF |
3653 | return status; |
3654 | inode = cstate->current_fh.fh_dentry->d_inode; | |
1da177e4 LT |
3655 | |
3656 | nfs4_lock_state(); | |
203a8c8e BF |
3657 | status = nfserr_bad_stateid; |
3658 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3659 | goto out; | |
3660 | status = nfserr_stale_stateid; | |
3661 | if (STALE_STATEID(stateid)) | |
3662 | goto out; | |
7e0f7cf5 | 3663 | status = nfserr_bad_stateid; |
203a8c8e BF |
3664 | if (!is_delegation_stateid(stateid)) |
3665 | goto out; | |
33515142 | 3666 | status = nfserr_expired; |
203a8c8e | 3667 | dp = find_delegation_stateid(inode, stateid); |
e4e83ea4 | 3668 | if (!dp) |
203a8c8e | 3669 | goto out; |
28dde241 | 3670 | status = check_stateid_generation(stateid, &dp->dl_stateid, nfsd4_has_session(cstate)); |
203a8c8e BF |
3671 | if (status) |
3672 | goto out; | |
3673 | renew_client(dp->dl_client); | |
3674 | ||
3675 | unhash_delegation(dp); | |
1da177e4 | 3676 | out: |
203a8c8e BF |
3677 | nfs4_unlock_state(); |
3678 | ||
1da177e4 LT |
3679 | return status; |
3680 | } | |
3681 | ||
3682 | ||
3683 | /* | |
3684 | * Lock owner state (byte-range locks) | |
3685 | */ | |
3686 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) | |
3687 | #define LOCK_HASH_BITS 8 | |
3688 | #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) | |
3689 | #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) | |
3690 | ||
87df4de8 BH |
3691 | static inline u64 |
3692 | end_offset(u64 start, u64 len) | |
3693 | { | |
3694 | u64 end; | |
3695 | ||
3696 | end = start + len; | |
3697 | return end >= start ? end: NFS4_MAX_UINT64; | |
3698 | } | |
3699 | ||
3700 | /* last octet in a range */ | |
3701 | static inline u64 | |
3702 | last_byte_offset(u64 start, u64 len) | |
3703 | { | |
3704 | u64 end; | |
3705 | ||
3706 | BUG_ON(!len); | |
3707 | end = start + len; | |
3708 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
3709 | } | |
3710 | ||
ddc04c41 BF |
3711 | static unsigned int lockownerid_hashval(u32 id) |
3712 | { | |
3713 | return id & LOCK_HASH_MASK; | |
3714 | } | |
1da177e4 LT |
3715 | |
3716 | static inline unsigned int | |
3717 | lock_ownerstr_hashval(struct inode *inode, u32 cl_id, | |
3718 | struct xdr_netobj *ownername) | |
3719 | { | |
3720 | return (file_hashval(inode) + cl_id | |
3721 | + opaque_hashval(ownername->data, ownername->len)) | |
3722 | & LOCK_HASH_MASK; | |
3723 | } | |
3724 | ||
3725 | static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; | |
3726 | static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; | |
1da177e4 | 3727 | |
e1ca12df BS |
3728 | static struct nfs4_delegation * |
3729 | search_for_delegation(stateid_t *stid) | |
3730 | { | |
3731 | struct nfs4_file *fp; | |
3732 | struct nfs4_delegation *dp; | |
3733 | struct list_head *pos; | |
3734 | int i; | |
3735 | ||
3736 | for (i = 0; i < FILE_HASH_SIZE; i++) { | |
3737 | list_for_each_entry(fp, &file_hashtbl[i], fi_hash) { | |
3738 | list_for_each(pos, &fp->fi_delegations) { | |
3739 | dp = list_entry(pos, struct nfs4_delegation, dl_perfile); | |
3740 | if (same_stateid(&dp->dl_stateid, stid)) | |
3741 | return dp; | |
3742 | } | |
3743 | } | |
3744 | } | |
3745 | return NULL; | |
3746 | } | |
3747 | ||
1da177e4 LT |
3748 | static struct nfs4_delegation * |
3749 | find_delegation_stateid(struct inode *ino, stateid_t *stid) | |
3750 | { | |
13cd2184 N |
3751 | struct nfs4_file *fp; |
3752 | struct nfs4_delegation *dl; | |
1da177e4 | 3753 | |
8c10cbdb BH |
3754 | dprintk("NFSD: %s: stateid=" STATEID_FMT "\n", __func__, |
3755 | STATEID_VAL(stid)); | |
1da177e4 | 3756 | |
1da177e4 | 3757 | fp = find_file(ino); |
13cd2184 N |
3758 | if (!fp) |
3759 | return NULL; | |
3760 | dl = find_delegation_file(fp, stid); | |
3761 | put_nfs4_file(fp); | |
3762 | return dl; | |
1da177e4 LT |
3763 | } |
3764 | ||
3765 | /* | |
3766 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
3767 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
3768 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
3769 | * locking, this prevents us from being completely protocol-compliant. The | |
3770 | * real solution to this problem is to start using unsigned file offsets in | |
3771 | * the VFS, but this is a very deep change! | |
3772 | */ | |
3773 | static inline void | |
3774 | nfs4_transform_lock_offset(struct file_lock *lock) | |
3775 | { | |
3776 | if (lock->fl_start < 0) | |
3777 | lock->fl_start = OFFSET_MAX; | |
3778 | if (lock->fl_end < 0) | |
3779 | lock->fl_end = OFFSET_MAX; | |
3780 | } | |
3781 | ||
d5b9026a N |
3782 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
3783 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 3784 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 3785 | }; |
1da177e4 LT |
3786 | |
3787 | static inline void | |
3788 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
3789 | { | |
fe0750e5 | 3790 | struct nfs4_lockowner *lo; |
1da177e4 | 3791 | |
d5b9026a | 3792 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 BF |
3793 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
3794 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, | |
3795 | lo->lo_owner.so_owner.len, GFP_KERNEL); | |
7c13f344 BF |
3796 | if (!deny->ld_owner.data) |
3797 | /* We just don't care that much */ | |
3798 | goto nevermind; | |
fe0750e5 BF |
3799 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
3800 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; | |
d5b9026a | 3801 | } else { |
7c13f344 BF |
3802 | nevermind: |
3803 | deny->ld_owner.len = 0; | |
3804 | deny->ld_owner.data = NULL; | |
d5b9026a N |
3805 | deny->ld_clientid.cl_boot = 0; |
3806 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
3807 | } |
3808 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
3809 | deny->ld_length = NFS4_MAX_UINT64; |
3810 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
3811 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
3812 | deny->ld_type = NFS4_READ_LT; | |
3813 | if (fl->fl_type != F_RDLCK) | |
3814 | deny->ld_type = NFS4_WRITE_LT; | |
3815 | } | |
3816 | ||
fe0750e5 BF |
3817 | static struct nfs4_lockowner * |
3818 | find_lockowner_str(struct inode *inode, clientid_t *clid, | |
1da177e4 LT |
3819 | struct xdr_netobj *owner) |
3820 | { | |
3821 | unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); | |
3822 | struct nfs4_stateowner *op; | |
3823 | ||
3824 | list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { | |
599e0a22 | 3825 | if (same_owner_str(op, owner, clid)) |
fe0750e5 | 3826 | return lockowner(op); |
1da177e4 LT |
3827 | } |
3828 | return NULL; | |
3829 | } | |
3830 | ||
dcef0413 | 3831 | static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp) |
ff194bd9 BF |
3832 | { |
3833 | unsigned int idhashval; | |
3834 | ||
fe0750e5 BF |
3835 | idhashval = lockownerid_hashval(lo->lo_owner.so_id); |
3836 | list_add(&lo->lo_owner.so_idhash, &lock_ownerid_hashtbl[idhashval]); | |
3837 | list_add(&lo->lo_owner.so_strhash, &lock_ownerstr_hashtbl[strhashval]); | |
3838 | list_add(&lo->lo_perstateid, &open_stp->st_lockowners); | |
ff194bd9 BF |
3839 | } |
3840 | ||
1da177e4 LT |
3841 | /* |
3842 | * Alloc a lock owner structure. | |
3843 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 3844 | * occurred. |
1da177e4 LT |
3845 | * |
3846 | * strhashval = lock_ownerstr_hashval | |
1da177e4 LT |
3847 | */ |
3848 | ||
fe0750e5 | 3849 | static struct nfs4_lockowner * |
dcef0413 | 3850 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) { |
fe0750e5 | 3851 | struct nfs4_lockowner *lo; |
1da177e4 | 3852 | |
fe0750e5 BF |
3853 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
3854 | if (!lo) | |
1da177e4 | 3855 | return NULL; |
fe0750e5 BF |
3856 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
3857 | lo->lo_owner.so_is_open_owner = 0; | |
b59e3c0e NB |
3858 | /* It is the openowner seqid that will be incremented in encode in the |
3859 | * case of new lockowners; so increment the lock seqid manually: */ | |
fe0750e5 BF |
3860 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; |
3861 | hash_lockowner(lo, strhashval, clp, open_stp); | |
3862 | return lo; | |
1da177e4 LT |
3863 | } |
3864 | ||
dcef0413 BF |
3865 | static struct nfs4_ol_stateid * |
3866 | alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 3867 | { |
dcef0413 | 3868 | struct nfs4_ol_stateid *stp; |
fe0750e5 | 3869 | unsigned int hashval = stateid_hashval(lo->lo_owner.so_id, fp->fi_id); |
1da177e4 | 3870 | |
5ac049ac N |
3871 | stp = nfs4_alloc_stateid(); |
3872 | if (stp == NULL) | |
1da177e4 | 3873 | goto out; |
dcef0413 | 3874 | list_add(&stp->st_stid.sc_hash, &stateid_hashtbl[hashval]); |
8beefa24 | 3875 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 BF |
3876 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
3877 | stp->st_stateowner = &lo->lo_owner; | |
dcef0413 | 3878 | stp->st_stid.sc_type = NFS4_LOCK_STID; |
13cd2184 | 3879 | get_nfs4_file(fp); |
1da177e4 | 3880 | stp->st_file = fp; |
dcef0413 BF |
3881 | stp->st_stid.sc_stateid.si_boot = boot_time; |
3882 | stp->st_stid.sc_stateid.si_stateownerid = lo->lo_owner.so_id; | |
3883 | stp->st_stid.sc_stateid.si_fileid = fp->fi_id; | |
73997dc4 | 3884 | /* note will be incremented before first return to client: */ |
dcef0413 | 3885 | stp->st_stid.sc_stateid.si_generation = 0; |
0997b173 | 3886 | stp->st_access_bmap = 0; |
1da177e4 | 3887 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 3888 | stp->st_openstp = open_stp; |
1da177e4 LT |
3889 | |
3890 | out: | |
3891 | return stp; | |
3892 | } | |
3893 | ||
fd39ca9a | 3894 | static int |
1da177e4 LT |
3895 | check_lock_length(u64 offset, u64 length) |
3896 | { | |
87df4de8 | 3897 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
3898 | LOFF_OVERFLOW(offset, length))); |
3899 | } | |
3900 | ||
dcef0413 | 3901 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 BF |
3902 | { |
3903 | struct nfs4_file *fp = lock_stp->st_file; | |
3904 | int oflag = nfs4_access_to_omode(access); | |
3905 | ||
3906 | if (test_bit(access, &lock_stp->st_access_bmap)) | |
3907 | return; | |
3908 | nfs4_file_get_access(fp, oflag); | |
3909 | __set_bit(access, &lock_stp->st_access_bmap); | |
3910 | } | |
3911 | ||
1da177e4 LT |
3912 | /* |
3913 | * LOCK operation | |
3914 | */ | |
b37ad28b | 3915 | __be32 |
ca364317 | 3916 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3917 | struct nfsd4_lock *lock) |
1da177e4 | 3918 | { |
fe0750e5 BF |
3919 | struct nfs4_openowner *open_sop = NULL; |
3920 | struct nfs4_lockowner *lock_sop = NULL; | |
dcef0413 | 3921 | struct nfs4_ol_stateid *lock_stp; |
7d947842 BF |
3922 | struct nfs4_file *fp; |
3923 | struct file *filp = NULL; | |
1da177e4 | 3924 | struct file_lock file_lock; |
8dc7c311 | 3925 | struct file_lock conflock; |
b37ad28b | 3926 | __be32 status = 0; |
1da177e4 | 3927 | unsigned int strhashval; |
b34f27aa | 3928 | int lkflg; |
b8dd7b9a | 3929 | int err; |
1da177e4 LT |
3930 | |
3931 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
3932 | (long long) lock->lk_offset, | |
3933 | (long long) lock->lk_length); | |
3934 | ||
1da177e4 LT |
3935 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
3936 | return nfserr_inval; | |
3937 | ||
ca364317 | 3938 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 3939 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
3940 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
3941 | return status; | |
3942 | } | |
3943 | ||
1da177e4 LT |
3944 | nfs4_lock_state(); |
3945 | ||
3946 | if (lock->lk_is_new) { | |
893f8770 N |
3947 | /* |
3948 | * Client indicates that this is a new lockowner. | |
3949 | * Use open owner and open stateid to create lock owner and | |
3950 | * lock stateid. | |
3951 | */ | |
dcef0413 | 3952 | struct nfs4_ol_stateid *open_stp = NULL; |
1da177e4 LT |
3953 | |
3954 | status = nfserr_stale_clientid; | |
60adfc50 AA |
3955 | if (!nfsd4_has_session(cstate) && |
3956 | STALE_CLIENTID(&lock->lk_new_clientid)) | |
1da177e4 | 3957 | goto out; |
1da177e4 | 3958 | |
1da177e4 | 3959 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 3960 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
3961 | lock->lk_new_open_seqid, |
3962 | &lock->lk_new_open_stateid, | |
c0a5d93e | 3963 | &open_stp); |
37515177 | 3964 | if (status) |
1da177e4 | 3965 | goto out; |
fe0750e5 | 3966 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 3967 | status = nfserr_bad_stateid; |
b34f27aa | 3968 | if (!nfsd4_has_session(cstate) && |
fe0750e5 | 3969 | !same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
b34f27aa BF |
3970 | &lock->v.new.clientid)) |
3971 | goto out; | |
1da177e4 LT |
3972 | /* create lockowner and lock stateid */ |
3973 | fp = open_stp->st_file; | |
fe0750e5 BF |
3974 | strhashval = lock_ownerstr_hashval(fp->fi_inode, |
3975 | open_sop->oo_owner.so_client->cl_clientid.cl_id, | |
1da177e4 | 3976 | &lock->v.new.owner); |
3e9e3dbe N |
3977 | /* XXX: Do we need to check for duplicate stateowners on |
3978 | * the same file, or should they just be allowed (and | |
3979 | * create new stateids)? */ | |
3e772463 | 3980 | status = nfserr_jukebox; |
b59e3c0e | 3981 | lock_sop = alloc_init_lock_stateowner(strhashval, |
fe0750e5 | 3982 | open_sop->oo_owner.so_client, open_stp, lock); |
b59e3c0e | 3983 | if (lock_sop == NULL) |
1da177e4 | 3984 | goto out; |
b59e3c0e | 3985 | lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); |
8a280510 | 3986 | if (lock_stp == NULL) |
1da177e4 | 3987 | goto out; |
1da177e4 LT |
3988 | } else { |
3989 | /* lock (lock owner + lock stateid) already exists */ | |
dd453dfd | 3990 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
3991 | lock->lk_old_lock_seqid, |
3992 | &lock->lk_old_lock_stateid, | |
2288d0e3 | 3993 | NFS4_LOCK_STID, &lock_stp); |
1da177e4 LT |
3994 | if (status) |
3995 | goto out; | |
fe0750e5 | 3996 | lock_sop = lockowner(lock_stp->st_stateowner); |
7d947842 | 3997 | fp = lock_stp->st_file; |
1da177e4 | 3998 | } |
9072d5c6 | 3999 | /* lock_sop and lock_stp have been created or found */ |
1da177e4 | 4000 | |
b34f27aa BF |
4001 | lkflg = setlkflg(lock->lk_type); |
4002 | status = nfs4_check_openmode(lock_stp, lkflg); | |
4003 | if (status) | |
4004 | goto out; | |
4005 | ||
0dd395dc | 4006 | status = nfserr_grace; |
af558e33 | 4007 | if (locks_in_grace() && !lock->lk_reclaim) |
0dd395dc N |
4008 | goto out; |
4009 | status = nfserr_no_grace; | |
af558e33 | 4010 | if (!locks_in_grace() && lock->lk_reclaim) |
0dd395dc N |
4011 | goto out; |
4012 | ||
1da177e4 LT |
4013 | locks_init_lock(&file_lock); |
4014 | switch (lock->lk_type) { | |
4015 | case NFS4_READ_LT: | |
4016 | case NFS4_READW_LT: | |
0997b173 BF |
4017 | filp = find_readable_file(lock_stp->st_file); |
4018 | if (filp) | |
4019 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
1da177e4 | 4020 | file_lock.fl_type = F_RDLCK; |
529d7b2a | 4021 | break; |
1da177e4 LT |
4022 | case NFS4_WRITE_LT: |
4023 | case NFS4_WRITEW_LT: | |
0997b173 BF |
4024 | filp = find_writeable_file(lock_stp->st_file); |
4025 | if (filp) | |
4026 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
1da177e4 | 4027 | file_lock.fl_type = F_WRLCK; |
529d7b2a | 4028 | break; |
1da177e4 LT |
4029 | default: |
4030 | status = nfserr_inval; | |
4031 | goto out; | |
4032 | } | |
f9d7562f BF |
4033 | if (!filp) { |
4034 | status = nfserr_openmode; | |
4035 | goto out; | |
4036 | } | |
b59e3c0e | 4037 | file_lock.fl_owner = (fl_owner_t)lock_sop; |
1da177e4 LT |
4038 | file_lock.fl_pid = current->tgid; |
4039 | file_lock.fl_file = filp; | |
4040 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 4041 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
4042 | |
4043 | file_lock.fl_start = lock->lk_offset; | |
87df4de8 | 4044 | file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); |
1da177e4 LT |
4045 | nfs4_transform_lock_offset(&file_lock); |
4046 | ||
4047 | /* | |
4048 | * Try to lock the file in the VFS. | |
4049 | * Note: locks.c uses the BKL to protect the inode's lock list. | |
4050 | */ | |
4051 | ||
529d7b2a | 4052 | err = vfs_lock_file(filp, F_SETLK, &file_lock, &conflock); |
b8dd7b9a | 4053 | switch (-err) { |
1da177e4 | 4054 | case 0: /* success! */ |
dcef0413 BF |
4055 | update_stateid(&lock_stp->st_stid.sc_stateid); |
4056 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, | |
1da177e4 | 4057 | sizeof(stateid_t)); |
b8dd7b9a | 4058 | status = 0; |
eb76b3fd AA |
4059 | break; |
4060 | case (EAGAIN): /* conflock holds conflicting lock */ | |
4061 | status = nfserr_denied; | |
4062 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
4063 | nfs4_set_lock_denied(&conflock, &lock->lk_denied); | |
4064 | break; | |
1da177e4 LT |
4065 | case (EDEADLK): |
4066 | status = nfserr_deadlock; | |
eb76b3fd | 4067 | break; |
3e772463 | 4068 | default: |
fd85b817 | 4069 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 4070 | status = nfserrno(err); |
eb76b3fd | 4071 | break; |
1da177e4 | 4072 | } |
1da177e4 | 4073 | out: |
8a280510 | 4074 | if (status && lock->lk_is_new && lock_sop) |
f044ff83 | 4075 | release_lockowner(lock_sop); |
5ec094c1 BF |
4076 | if (!cstate->replay_owner) |
4077 | nfs4_unlock_state(); | |
1da177e4 LT |
4078 | return status; |
4079 | } | |
4080 | ||
55ef1274 BF |
4081 | /* |
4082 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
4083 | * so we do a temporary open here just to get an open file to pass to | |
4084 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
4085 | * inode operation.) | |
4086 | */ | |
4087 | static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) | |
4088 | { | |
4089 | struct file *file; | |
4090 | int err; | |
4091 | ||
4092 | err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); | |
4093 | if (err) | |
4094 | return err; | |
4095 | err = vfs_test_lock(file, lock); | |
4096 | nfsd_close(file); | |
4097 | return err; | |
4098 | } | |
4099 | ||
1da177e4 LT |
4100 | /* |
4101 | * LOCKT operation | |
4102 | */ | |
b37ad28b | 4103 | __be32 |
ca364317 BF |
4104 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4105 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
4106 | { |
4107 | struct inode *inode; | |
1da177e4 | 4108 | struct file_lock file_lock; |
fe0750e5 | 4109 | struct nfs4_lockowner *lo; |
fd85b817 | 4110 | int error; |
b37ad28b | 4111 | __be32 status; |
1da177e4 | 4112 | |
af558e33 | 4113 | if (locks_in_grace()) |
1da177e4 LT |
4114 | return nfserr_grace; |
4115 | ||
4116 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
4117 | return nfserr_inval; | |
4118 | ||
1da177e4 LT |
4119 | nfs4_lock_state(); |
4120 | ||
4121 | status = nfserr_stale_clientid; | |
60adfc50 | 4122 | if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) |
1da177e4 | 4123 | goto out; |
1da177e4 | 4124 | |
75c096f7 | 4125 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 4126 | goto out; |
1da177e4 | 4127 | |
ca364317 | 4128 | inode = cstate->current_fh.fh_dentry->d_inode; |
1da177e4 LT |
4129 | locks_init_lock(&file_lock); |
4130 | switch (lockt->lt_type) { | |
4131 | case NFS4_READ_LT: | |
4132 | case NFS4_READW_LT: | |
4133 | file_lock.fl_type = F_RDLCK; | |
4134 | break; | |
4135 | case NFS4_WRITE_LT: | |
4136 | case NFS4_WRITEW_LT: | |
4137 | file_lock.fl_type = F_WRLCK; | |
4138 | break; | |
4139 | default: | |
2fdada03 | 4140 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
4141 | status = nfserr_inval; |
4142 | goto out; | |
4143 | } | |
4144 | ||
fe0750e5 BF |
4145 | lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner); |
4146 | if (lo) | |
4147 | file_lock.fl_owner = (fl_owner_t)lo; | |
1da177e4 LT |
4148 | file_lock.fl_pid = current->tgid; |
4149 | file_lock.fl_flags = FL_POSIX; | |
4150 | ||
4151 | file_lock.fl_start = lockt->lt_offset; | |
87df4de8 | 4152 | file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); |
1da177e4 LT |
4153 | |
4154 | nfs4_transform_lock_offset(&file_lock); | |
4155 | ||
1da177e4 | 4156 | status = nfs_ok; |
55ef1274 | 4157 | error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); |
fd85b817 ME |
4158 | if (error) { |
4159 | status = nfserrno(error); | |
4160 | goto out; | |
4161 | } | |
9d6a8c5c | 4162 | if (file_lock.fl_type != F_UNLCK) { |
1da177e4 | 4163 | status = nfserr_denied; |
9d6a8c5c | 4164 | nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); |
1da177e4 LT |
4165 | } |
4166 | out: | |
4167 | nfs4_unlock_state(); | |
4168 | return status; | |
4169 | } | |
4170 | ||
b37ad28b | 4171 | __be32 |
ca364317 | 4172 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4173 | struct nfsd4_locku *locku) |
1da177e4 | 4174 | { |
dcef0413 | 4175 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
4176 | struct file *filp = NULL; |
4177 | struct file_lock file_lock; | |
b37ad28b | 4178 | __be32 status; |
b8dd7b9a | 4179 | int err; |
1da177e4 LT |
4180 | |
4181 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", | |
4182 | (long long) locku->lu_offset, | |
4183 | (long long) locku->lu_length); | |
4184 | ||
4185 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
4186 | return nfserr_inval; | |
4187 | ||
4188 | nfs4_lock_state(); | |
4189 | ||
9072d5c6 | 4190 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
2288d0e3 | 4191 | &locku->lu_stateid, NFS4_LOCK_STID, &stp); |
9072d5c6 | 4192 | if (status) |
1da177e4 | 4193 | goto out; |
f9d7562f BF |
4194 | filp = find_any_file(stp->st_file); |
4195 | if (!filp) { | |
4196 | status = nfserr_lock_range; | |
4197 | goto out; | |
4198 | } | |
1da177e4 LT |
4199 | BUG_ON(!filp); |
4200 | locks_init_lock(&file_lock); | |
4201 | file_lock.fl_type = F_UNLCK; | |
fe0750e5 | 4202 | file_lock.fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); |
1da177e4 LT |
4203 | file_lock.fl_pid = current->tgid; |
4204 | file_lock.fl_file = filp; | |
4205 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 4206 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
4207 | file_lock.fl_start = locku->lu_offset; |
4208 | ||
87df4de8 | 4209 | file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); |
1da177e4 LT |
4210 | nfs4_transform_lock_offset(&file_lock); |
4211 | ||
4212 | /* | |
4213 | * Try to unlock the file in the VFS. | |
4214 | */ | |
fd85b817 | 4215 | err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); |
b8dd7b9a | 4216 | if (err) { |
fd85b817 | 4217 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
4218 | goto out_nfserr; |
4219 | } | |
4220 | /* | |
4221 | * OK, unlock succeeded; the only thing left to do is update the stateid. | |
4222 | */ | |
dcef0413 BF |
4223 | update_stateid(&stp->st_stid.sc_stateid); |
4224 | memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
4225 | |
4226 | out: | |
1da177e4 LT |
4227 | nfs4_unlock_state(); |
4228 | return status; | |
4229 | ||
4230 | out_nfserr: | |
b8dd7b9a | 4231 | status = nfserrno(err); |
1da177e4 LT |
4232 | goto out; |
4233 | } | |
4234 | ||
4235 | /* | |
4236 | * returns | |
4237 | * 1: locks held by lockowner | |
4238 | * 0: no locks held by lockowner | |
4239 | */ | |
4240 | static int | |
fe0750e5 | 4241 | check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner) |
1da177e4 LT |
4242 | { |
4243 | struct file_lock **flpp; | |
f9d7562f | 4244 | struct inode *inode = filp->fi_inode; |
1da177e4 LT |
4245 | int status = 0; |
4246 | ||
b89f4321 | 4247 | lock_flocks(); |
1da177e4 | 4248 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
796dadfd | 4249 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
4250 | status = 1; |
4251 | goto out; | |
796dadfd | 4252 | } |
1da177e4 LT |
4253 | } |
4254 | out: | |
b89f4321 | 4255 | unlock_flocks(); |
1da177e4 LT |
4256 | return status; |
4257 | } | |
4258 | ||
b37ad28b | 4259 | __be32 |
b591480b BF |
4260 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
4261 | struct nfsd4_compound_state *cstate, | |
4262 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
4263 | { |
4264 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe | 4265 | struct nfs4_stateowner *sop; |
fe0750e5 | 4266 | struct nfs4_lockowner *lo; |
dcef0413 | 4267 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4268 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe N |
4269 | struct list_head matches; |
4270 | int i; | |
b37ad28b | 4271 | __be32 status; |
1da177e4 LT |
4272 | |
4273 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
4274 | clid->cl_boot, clid->cl_id); | |
4275 | ||
4276 | /* XXX check for lease expiration */ | |
4277 | ||
4278 | status = nfserr_stale_clientid; | |
849823c5 | 4279 | if (STALE_CLIENTID(clid)) |
1da177e4 | 4280 | return status; |
1da177e4 LT |
4281 | |
4282 | nfs4_lock_state(); | |
4283 | ||
3e9e3dbe N |
4284 | status = nfserr_locks_held; |
4285 | /* XXX: we're doing a linear search through all the lockowners. | |
4286 | * Yipes! For now we'll just hope clients aren't really using | |
4287 | * release_lockowner much, but eventually we have to fix these | |
4288 | * data structures. */ | |
4289 | INIT_LIST_HEAD(&matches); | |
4290 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
4291 | list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { | |
599e0a22 | 4292 | if (!same_owner_str(sop, owner, clid)) |
3e9e3dbe N |
4293 | continue; |
4294 | list_for_each_entry(stp, &sop->so_stateids, | |
4295 | st_perstateowner) { | |
fe0750e5 BF |
4296 | lo = lockowner(sop); |
4297 | if (check_for_locks(stp->st_file, lo)) | |
3e9e3dbe | 4298 | goto out; |
fe0750e5 | 4299 | list_add(&lo->lo_list, &matches); |
3e9e3dbe | 4300 | } |
1da177e4 | 4301 | } |
3e9e3dbe N |
4302 | } |
4303 | /* Clients probably won't expect us to return with some (but not all) | |
4304 | * of the lockowner state released; so don't release any until all | |
4305 | * have been checked. */ | |
4306 | status = nfs_ok; | |
0fa822e4 | 4307 | while (!list_empty(&matches)) { |
fe0750e5 BF |
4308 | lo = list_entry(matches.next, struct nfs4_lockowner, |
4309 | lo_list); | |
0fa822e4 N |
4310 | /* unhash_stateowner deletes so_perclient only |
4311 | * for openowners. */ | |
fe0750e5 BF |
4312 | list_del(&lo->lo_list); |
4313 | release_lockowner(lo); | |
1da177e4 LT |
4314 | } |
4315 | out: | |
4316 | nfs4_unlock_state(); | |
4317 | return status; | |
4318 | } | |
4319 | ||
4320 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 4321 | alloc_reclaim(void) |
1da177e4 | 4322 | { |
a55370a3 | 4323 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
4324 | } |
4325 | ||
c7b9a459 | 4326 | int |
a1bcecd2 | 4327 | nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) |
c7b9a459 N |
4328 | { |
4329 | unsigned int strhashval = clientstr_hashval(name); | |
4330 | struct nfs4_client *clp; | |
4331 | ||
e203d506 | 4332 | clp = find_confirmed_client_by_str(name, strhashval); |
c7b9a459 N |
4333 | return clp ? 1 : 0; |
4334 | } | |
4335 | ||
1da177e4 LT |
4336 | /* |
4337 | * failure => all reset bets are off, nfserr_no_grace... | |
4338 | */ | |
190e4fbf N |
4339 | int |
4340 | nfs4_client_to_reclaim(const char *name) | |
1da177e4 LT |
4341 | { |
4342 | unsigned int strhashval; | |
4343 | struct nfs4_client_reclaim *crp = NULL; | |
4344 | ||
a55370a3 N |
4345 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
4346 | crp = alloc_reclaim(); | |
1da177e4 LT |
4347 | if (!crp) |
4348 | return 0; | |
a55370a3 | 4349 | strhashval = clientstr_hashval(name); |
1da177e4 LT |
4350 | INIT_LIST_HEAD(&crp->cr_strhash); |
4351 | list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); | |
a55370a3 | 4352 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
1da177e4 LT |
4353 | reclaim_str_hashtbl_size++; |
4354 | return 1; | |
4355 | } | |
4356 | ||
4357 | static void | |
4358 | nfs4_release_reclaim(void) | |
4359 | { | |
4360 | struct nfs4_client_reclaim *crp = NULL; | |
4361 | int i; | |
4362 | ||
1da177e4 LT |
4363 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4364 | while (!list_empty(&reclaim_str_hashtbl[i])) { | |
4365 | crp = list_entry(reclaim_str_hashtbl[i].next, | |
4366 | struct nfs4_client_reclaim, cr_strhash); | |
4367 | list_del(&crp->cr_strhash); | |
1da177e4 LT |
4368 | kfree(crp); |
4369 | reclaim_str_hashtbl_size--; | |
4370 | } | |
4371 | } | |
4372 | BUG_ON(reclaim_str_hashtbl_size); | |
4373 | } | |
4374 | ||
4375 | /* | |
4376 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
fd39ca9a | 4377 | static struct nfs4_client_reclaim * |
1da177e4 LT |
4378 | nfs4_find_reclaim_client(clientid_t *clid) |
4379 | { | |
4380 | unsigned int strhashval; | |
4381 | struct nfs4_client *clp; | |
4382 | struct nfs4_client_reclaim *crp = NULL; | |
4383 | ||
4384 | ||
4385 | /* find clientid in conf_id_hashtbl */ | |
4386 | clp = find_confirmed_client(clid); | |
4387 | if (clp == NULL) | |
4388 | return NULL; | |
4389 | ||
a55370a3 N |
4390 | dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", |
4391 | clp->cl_name.len, clp->cl_name.data, | |
4392 | clp->cl_recdir); | |
1da177e4 LT |
4393 | |
4394 | /* find clp->cl_name in reclaim_str_hashtbl */ | |
a55370a3 | 4395 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 | 4396 | list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { |
a55370a3 | 4397 | if (same_name(crp->cr_recdir, clp->cl_recdir)) { |
1da177e4 LT |
4398 | return crp; |
4399 | } | |
4400 | } | |
4401 | return NULL; | |
4402 | } | |
4403 | ||
4404 | /* | |
4405 | * Called from OPEN. Look for clientid in reclaim list. | |
4406 | */ | |
b37ad28b | 4407 | __be32 |
1da177e4 LT |
4408 | nfs4_check_open_reclaim(clientid_t *clid) |
4409 | { | |
dfc83565 | 4410 | return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; |
1da177e4 LT |
4411 | } |
4412 | ||
ac4d8ff2 | 4413 | /* initialization to perform at module load time: */ |
1da177e4 | 4414 | |
e8ff2a84 | 4415 | int |
ac4d8ff2 | 4416 | nfs4_state_init(void) |
1da177e4 | 4417 | { |
e8ff2a84 | 4418 | int i, status; |
1da177e4 | 4419 | |
e8ff2a84 BF |
4420 | status = nfsd4_init_slabs(); |
4421 | if (status) | |
4422 | return status; | |
1da177e4 LT |
4423 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4424 | INIT_LIST_HEAD(&conf_id_hashtbl[i]); | |
4425 | INIT_LIST_HEAD(&conf_str_hashtbl[i]); | |
4426 | INIT_LIST_HEAD(&unconf_str_hashtbl[i]); | |
4427 | INIT_LIST_HEAD(&unconf_id_hashtbl[i]); | |
02cb2858 | 4428 | INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); |
1da177e4 | 4429 | } |
5282fd72 ME |
4430 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
4431 | INIT_LIST_HEAD(&sessionid_hashtbl[i]); | |
1da177e4 LT |
4432 | for (i = 0; i < FILE_HASH_SIZE; i++) { |
4433 | INIT_LIST_HEAD(&file_hashtbl[i]); | |
4434 | } | |
506f275f BF |
4435 | for (i = 0; i < OPEN_OWNER_HASH_SIZE; i++) { |
4436 | INIT_LIST_HEAD(&open_ownerstr_hashtbl[i]); | |
4437 | INIT_LIST_HEAD(&open_ownerid_hashtbl[i]); | |
1da177e4 | 4438 | } |
b79abadd | 4439 | for (i = 0; i < STATEID_HASH_SIZE; i++) |
1da177e4 | 4440 | INIT_LIST_HEAD(&stateid_hashtbl[i]); |
1da177e4 LT |
4441 | for (i = 0; i < LOCK_HASH_SIZE; i++) { |
4442 | INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); | |
4443 | INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); | |
4444 | } | |
1da177e4 | 4445 | memset(&onestateid, ~0, sizeof(stateid_t)); |
1da177e4 LT |
4446 | INIT_LIST_HEAD(&close_lru); |
4447 | INIT_LIST_HEAD(&client_lru); | |
4448 | INIT_LIST_HEAD(&del_recall_lru); | |
ac4d8ff2 | 4449 | reclaim_str_hashtbl_size = 0; |
e8ff2a84 | 4450 | return 0; |
ac4d8ff2 N |
4451 | } |
4452 | ||
190e4fbf N |
4453 | static void |
4454 | nfsd4_load_reboot_recovery_data(void) | |
4455 | { | |
4456 | int status; | |
4457 | ||
0964a3d3 | 4458 | nfs4_lock_state(); |
48483bf2 | 4459 | nfsd4_init_recdir(); |
190e4fbf | 4460 | status = nfsd4_recdir_load(); |
0964a3d3 | 4461 | nfs4_unlock_state(); |
190e4fbf N |
4462 | if (status) |
4463 | printk("NFSD: Failure reading reboot recovery data\n"); | |
4464 | } | |
4465 | ||
c2f1a551 MS |
4466 | /* |
4467 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
4468 | * client may quite reasonably hang on to a delegation as long as it has | |
4469 | * the inode cached. This becomes an obvious problem the first time a | |
4470 | * client's inode cache approaches the size of the server's total memory. | |
4471 | * | |
4472 | * For now we avoid this problem by imposing a hard limit on the number | |
4473 | * of delegations, which varies according to the server's memory size. | |
4474 | */ | |
4475 | static void | |
4476 | set_max_delegations(void) | |
4477 | { | |
4478 | /* | |
4479 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
4480 | * estimates suggest that in the worst case (where every delegation | |
4481 | * is for a different inode), a delegation could take about 1.5K, | |
4482 | * giving a worst case usage of about 6% of memory. | |
4483 | */ | |
4484 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
4485 | } | |
4486 | ||
ac4d8ff2 N |
4487 | /* initialization to perform when the nfsd service is started: */ |
4488 | ||
29ab23cc | 4489 | static int |
ac4d8ff2 N |
4490 | __nfs4_state_start(void) |
4491 | { | |
b5a1a81e BF |
4492 | int ret; |
4493 | ||
1da177e4 | 4494 | boot_time = get_seconds(); |
af558e33 | 4495 | locks_start_grace(&nfsd4_manager); |
9a8db97e | 4496 | printk(KERN_INFO "NFSD: starting %ld-second grace period\n", |
e46b498c | 4497 | nfsd4_grace); |
b5a1a81e BF |
4498 | ret = set_callback_cred(); |
4499 | if (ret) | |
4500 | return -ENOMEM; | |
58da282b | 4501 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
29ab23cc BF |
4502 | if (laundry_wq == NULL) |
4503 | return -ENOMEM; | |
b5a1a81e BF |
4504 | ret = nfsd4_create_callback_queue(); |
4505 | if (ret) | |
4506 | goto out_free_laundry; | |
e46b498c | 4507 | queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); |
c2f1a551 | 4508 | set_max_delegations(); |
b5a1a81e BF |
4509 | return 0; |
4510 | out_free_laundry: | |
4511 | destroy_workqueue(laundry_wq); | |
4512 | return ret; | |
1da177e4 LT |
4513 | } |
4514 | ||
29ab23cc | 4515 | int |
76a3550e | 4516 | nfs4_state_start(void) |
1da177e4 | 4517 | { |
190e4fbf | 4518 | nfsd4_load_reboot_recovery_data(); |
4ad9a344 | 4519 | return __nfs4_state_start(); |
1da177e4 LT |
4520 | } |
4521 | ||
1da177e4 LT |
4522 | static void |
4523 | __nfs4_state_shutdown(void) | |
4524 | { | |
4525 | int i; | |
4526 | struct nfs4_client *clp = NULL; | |
4527 | struct nfs4_delegation *dp = NULL; | |
1da177e4 LT |
4528 | struct list_head *pos, *next, reaplist; |
4529 | ||
1da177e4 LT |
4530 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4531 | while (!list_empty(&conf_id_hashtbl[i])) { | |
4532 | clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
4533 | expire_client(clp); | |
4534 | } | |
4535 | while (!list_empty(&unconf_str_hashtbl[i])) { | |
4536 | clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); | |
4537 | expire_client(clp); | |
4538 | } | |
4539 | } | |
4540 | INIT_LIST_HEAD(&reaplist); | |
4541 | spin_lock(&recall_lock); | |
4542 | list_for_each_safe(pos, next, &del_recall_lru) { | |
4543 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4544 | list_move(&dp->dl_recall_lru, &reaplist); | |
4545 | } | |
4546 | spin_unlock(&recall_lock); | |
4547 | list_for_each_safe(pos, next, &reaplist) { | |
4548 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4549 | list_del_init(&dp->dl_recall_lru); | |
4550 | unhash_delegation(dp); | |
4551 | } | |
4552 | ||
190e4fbf | 4553 | nfsd4_shutdown_recdir(); |
1da177e4 LT |
4554 | } |
4555 | ||
4556 | void | |
4557 | nfs4_state_shutdown(void) | |
4558 | { | |
afe2c511 | 4559 | cancel_delayed_work_sync(&laundromat_work); |
5e8d5c29 | 4560 | destroy_workqueue(laundry_wq); |
2c5e7615 | 4561 | locks_end_grace(&nfsd4_manager); |
1da177e4 LT |
4562 | nfs4_lock_state(); |
4563 | nfs4_release_reclaim(); | |
4564 | __nfs4_state_shutdown(); | |
1da177e4 | 4565 | nfs4_unlock_state(); |
c3935e30 | 4566 | nfsd4_destroy_callback_queue(); |
1da177e4 | 4567 | } |