Commit | Line | Data |
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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (c) 2001 The Regents of the University of Michigan. |
3 | * All rights reserved. | |
4 | * | |
5 | * Kendrick Smith <kmsmith@umich.edu> | |
6 | * Andy Adamson <kandros@umich.edu> | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * | |
12 | * 1. Redistributions of source code must retain the above copyright | |
13 | * notice, this list of conditions and the following disclaimer. | |
14 | * 2. Redistributions in binary form must reproduce the above copyright | |
15 | * notice, this list of conditions and the following disclaimer in the | |
16 | * documentation and/or other materials provided with the distribution. | |
17 | * 3. Neither the name of the University nor the names of its | |
18 | * contributors may be used to endorse or promote products derived | |
19 | * from this software without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
22 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
23 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
24 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
26 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
27 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
28 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
29 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
30 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
31 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
32 | * | |
33 | */ | |
34 | ||
aceaf78d | 35 | #include <linux/file.h> |
b89f4321 | 36 | #include <linux/fs.h> |
5a0e3ad6 | 37 | #include <linux/slab.h> |
0964a3d3 | 38 | #include <linux/namei.h> |
c2f1a551 | 39 | #include <linux/swap.h> |
17456804 | 40 | #include <linux/pagemap.h> |
68e76ad0 | 41 | #include <linux/sunrpc/svcauth_gss.h> |
363168b4 | 42 | #include <linux/sunrpc/clnt.h> |
9a74af21 | 43 | #include "xdr4.h" |
0a3adade | 44 | #include "vfs.h" |
1da177e4 LT |
45 | |
46 | #define NFSDDBG_FACILITY NFSDDBG_PROC | |
47 | ||
48 | /* Globals */ | |
cf07d2ea | 49 | time_t nfsd4_lease = 90; /* default lease time */ |
efc4bb4f | 50 | time_t nfsd4_grace = 90; |
fd39ca9a | 51 | static time_t boot_time; |
d3b313a4 | 52 | static u32 current_stateid = 1; |
fd39ca9a N |
53 | static stateid_t zerostateid; /* bits all 0 */ |
54 | static stateid_t onestateid; /* bits all 1 */ | |
ec6b5d7b | 55 | static u64 current_sessionid = 1; |
fd39ca9a N |
56 | |
57 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t))) | |
58 | #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t))) | |
1da177e4 | 59 | |
1da177e4 | 60 | /* forward declarations */ |
fe0750e5 | 61 | static int check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner); |
1da177e4 | 62 | |
8b671b80 BF |
63 | /* Locking: */ |
64 | ||
65 | /* Currently used for almost all code touching nfsv4 state: */ | |
353ab6e9 | 66 | static DEFINE_MUTEX(client_mutex); |
1da177e4 | 67 | |
8b671b80 BF |
68 | /* |
69 | * Currently used for the del_recall_lru and file hash table. In an | |
70 | * effort to decrease the scope of the client_mutex, this spinlock may | |
71 | * eventually cover more: | |
72 | */ | |
73 | static DEFINE_SPINLOCK(recall_lock); | |
74 | ||
fe0750e5 BF |
75 | static struct kmem_cache *openowner_slab = NULL; |
76 | static struct kmem_cache *lockowner_slab = NULL; | |
e18b890b CL |
77 | static struct kmem_cache *file_slab = NULL; |
78 | static struct kmem_cache *stateid_slab = NULL; | |
79 | static struct kmem_cache *deleg_slab = NULL; | |
e60d4398 | 80 | |
1da177e4 LT |
81 | void |
82 | nfs4_lock_state(void) | |
83 | { | |
353ab6e9 | 84 | mutex_lock(&client_mutex); |
1da177e4 LT |
85 | } |
86 | ||
87 | void | |
88 | nfs4_unlock_state(void) | |
89 | { | |
353ab6e9 | 90 | mutex_unlock(&client_mutex); |
1da177e4 LT |
91 | } |
92 | ||
93 | static inline u32 | |
94 | opaque_hashval(const void *ptr, int nbytes) | |
95 | { | |
96 | unsigned char *cptr = (unsigned char *) ptr; | |
97 | ||
98 | u32 x = 0; | |
99 | while (nbytes--) { | |
100 | x *= 37; | |
101 | x += *cptr++; | |
102 | } | |
103 | return x; | |
104 | } | |
105 | ||
1da177e4 LT |
106 | static struct list_head del_recall_lru; |
107 | ||
13cd2184 N |
108 | static inline void |
109 | put_nfs4_file(struct nfs4_file *fi) | |
110 | { | |
8b671b80 BF |
111 | if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { |
112 | list_del(&fi->fi_hash); | |
113 | spin_unlock(&recall_lock); | |
114 | iput(fi->fi_inode); | |
115 | kmem_cache_free(file_slab, fi); | |
116 | } | |
13cd2184 N |
117 | } |
118 | ||
119 | static inline void | |
120 | get_nfs4_file(struct nfs4_file *fi) | |
121 | { | |
8b671b80 | 122 | atomic_inc(&fi->fi_ref); |
13cd2184 N |
123 | } |
124 | ||
ef0f3390 | 125 | static int num_delegations; |
c2f1a551 | 126 | unsigned int max_delegations; |
ef0f3390 N |
127 | |
128 | /* | |
129 | * Open owner state (share locks) | |
130 | */ | |
131 | ||
506f275f BF |
132 | /* hash tables for open owners */ |
133 | #define OPEN_OWNER_HASH_BITS 8 | |
134 | #define OPEN_OWNER_HASH_SIZE (1 << OPEN_OWNER_HASH_BITS) | |
135 | #define OPEN_OWNER_HASH_MASK (OPEN_OWNER_HASH_SIZE - 1) | |
ef0f3390 | 136 | |
506f275f | 137 | static unsigned int open_ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername) |
ddc04c41 BF |
138 | { |
139 | unsigned int ret; | |
140 | ||
141 | ret = opaque_hashval(ownername->data, ownername->len); | |
142 | ret += clientid; | |
506f275f | 143 | return ret & OPEN_OWNER_HASH_MASK; |
ddc04c41 | 144 | } |
ef0f3390 | 145 | |
506f275f | 146 | static struct list_head open_ownerstr_hashtbl[OPEN_OWNER_HASH_SIZE]; |
ef0f3390 N |
147 | |
148 | /* hash table for nfs4_file */ | |
149 | #define FILE_HASH_BITS 8 | |
150 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
35079582 | 151 | |
dcef0413 | 152 | /* hash table for (open)nfs4_ol_stateid */ |
ef0f3390 N |
153 | #define STATEID_HASH_BITS 10 |
154 | #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS) | |
155 | #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1) | |
156 | ||
ddc04c41 BF |
157 | static unsigned int file_hashval(struct inode *ino) |
158 | { | |
159 | /* XXX: why are we hashing on inode pointer, anyway? */ | |
160 | return hash_ptr(ino, FILE_HASH_BITS); | |
161 | } | |
162 | ||
ee626a77 | 163 | static unsigned int stateid_hashval(stateid_t *s) |
ddc04c41 | 164 | { |
ee626a77 | 165 | return opaque_hashval(&s->si_opaque, sizeof(stateid_opaque_t)) & STATEID_HASH_MASK; |
ddc04c41 | 166 | } |
ef0f3390 N |
167 | |
168 | static struct list_head file_hashtbl[FILE_HASH_SIZE]; | |
169 | static struct list_head stateid_hashtbl[STATEID_HASH_SIZE]; | |
170 | ||
998db52c | 171 | static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
f9d7562f BF |
172 | { |
173 | BUG_ON(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR])); | |
174 | atomic_inc(&fp->fi_access[oflag]); | |
175 | } | |
176 | ||
998db52c BF |
177 | static void nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
178 | { | |
179 | if (oflag == O_RDWR) { | |
180 | __nfs4_file_get_access(fp, O_RDONLY); | |
181 | __nfs4_file_get_access(fp, O_WRONLY); | |
182 | } else | |
183 | __nfs4_file_get_access(fp, oflag); | |
184 | } | |
185 | ||
186 | static void nfs4_file_put_fd(struct nfs4_file *fp, int oflag) | |
f9d7562f BF |
187 | { |
188 | if (fp->fi_fds[oflag]) { | |
189 | fput(fp->fi_fds[oflag]); | |
190 | fp->fi_fds[oflag] = NULL; | |
191 | } | |
192 | } | |
193 | ||
998db52c | 194 | static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
f9d7562f BF |
195 | { |
196 | if (atomic_dec_and_test(&fp->fi_access[oflag])) { | |
197 | nfs4_file_put_fd(fp, O_RDWR); | |
198 | nfs4_file_put_fd(fp, oflag); | |
199 | } | |
200 | } | |
201 | ||
998db52c BF |
202 | static void nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
203 | { | |
204 | if (oflag == O_RDWR) { | |
205 | __nfs4_file_put_access(fp, O_RDONLY); | |
206 | __nfs4_file_put_access(fp, O_WRONLY); | |
207 | } else | |
208 | __nfs4_file_put_access(fp, oflag); | |
209 | } | |
210 | ||
36d44c60 BF |
211 | static inline void hash_stid(struct nfs4_stid *stid) |
212 | { | |
213 | stateid_t *s = &stid->sc_stateid; | |
214 | unsigned int hashval; | |
215 | ||
ee626a77 | 216 | hashval = stateid_hashval(s); |
36d44c60 BF |
217 | list_add(&stid->sc_hash, &stateid_hashtbl[hashval]); |
218 | } | |
219 | ||
1da177e4 | 220 | static struct nfs4_delegation * |
dcef0413 | 221 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_ol_stateid *stp, struct svc_fh *current_fh, u32 type) |
1da177e4 LT |
222 | { |
223 | struct nfs4_delegation *dp; | |
224 | struct nfs4_file *fp = stp->st_file; | |
1da177e4 LT |
225 | |
226 | dprintk("NFSD alloc_init_deleg\n"); | |
c3e48080 BF |
227 | /* |
228 | * Major work on the lease subsystem (for example, to support | |
229 | * calbacks on stat) will be required before we can support | |
230 | * write delegations properly. | |
231 | */ | |
232 | if (type != NFS4_OPEN_DELEGATE_READ) | |
233 | return NULL; | |
47f9940c MS |
234 | if (fp->fi_had_conflict) |
235 | return NULL; | |
c2f1a551 | 236 | if (num_delegations > max_delegations) |
ef0f3390 | 237 | return NULL; |
5b2d21c1 N |
238 | dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); |
239 | if (dp == NULL) | |
1da177e4 | 240 | return dp; |
ef0f3390 | 241 | num_delegations++; |
ea1da636 N |
242 | INIT_LIST_HEAD(&dp->dl_perfile); |
243 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 LT |
244 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
245 | dp->dl_client = clp; | |
13cd2184 | 246 | get_nfs4_file(fp); |
1da177e4 | 247 | dp->dl_file = fp; |
1da177e4 | 248 | dp->dl_type = type; |
f459e453 | 249 | dp->dl_stid.sc_type = NFS4_DELEG_STID; |
d3b313a4 BF |
250 | dp->dl_stid.sc_stateid.si_opaque.so_clid = clp->cl_clientid; |
251 | dp->dl_stid.sc_stateid.si_opaque.so_id = current_stateid++; | |
d5477a8d | 252 | dp->dl_stid.sc_stateid.si_generation = 1; |
f459e453 | 253 | hash_stid(&dp->dl_stid); |
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 | { | |
f459e453 | 286 | list_del_init(&dp->dl_stid.sc_hash); |
ea1da636 | 287 | list_del_init(&dp->dl_perclnt); |
1da177e4 | 288 | spin_lock(&recall_lock); |
5d926e8c | 289 | list_del_init(&dp->dl_perfile); |
1da177e4 LT |
290 | list_del_init(&dp->dl_recall_lru); |
291 | spin_unlock(&recall_lock); | |
acfdf5c3 | 292 | nfs4_put_deleg_lease(dp->dl_file); |
1da177e4 LT |
293 | nfs4_put_delegation(dp); |
294 | } | |
295 | ||
296 | /* | |
297 | * SETCLIENTID state | |
298 | */ | |
299 | ||
36acb66b | 300 | /* client_lock protects the client lru list and session hash table */ |
9089f1b4 BH |
301 | static DEFINE_SPINLOCK(client_lock); |
302 | ||
1da177e4 LT |
303 | /* Hash tables for nfs4_clientid state */ |
304 | #define CLIENT_HASH_BITS 4 | |
305 | #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) | |
306 | #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) | |
307 | ||
ddc04c41 BF |
308 | static unsigned int clientid_hashval(u32 id) |
309 | { | |
310 | return id & CLIENT_HASH_MASK; | |
311 | } | |
312 | ||
313 | static unsigned int clientstr_hashval(const char *name) | |
314 | { | |
315 | return opaque_hashval(name, 8) & CLIENT_HASH_MASK; | |
316 | } | |
317 | ||
1da177e4 LT |
318 | /* |
319 | * reclaim_str_hashtbl[] holds known client info from previous reset/reboot | |
320 | * used in reboot/reset lease grace period processing | |
321 | * | |
322 | * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed | |
323 | * setclientid_confirmed info. | |
324 | * | |
325 | * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed | |
326 | * setclientid info. | |
327 | * | |
328 | * client_lru holds client queue ordered by nfs4_client.cl_time | |
329 | * for lease renewal. | |
330 | * | |
331 | * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time | |
332 | * for last close replay. | |
333 | */ | |
334 | static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; | |
335 | static int reclaim_str_hashtbl_size = 0; | |
336 | static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; | |
337 | static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; | |
338 | static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; | |
339 | static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; | |
340 | static struct list_head client_lru; | |
341 | static struct list_head close_lru; | |
342 | ||
f9d7562f BF |
343 | /* |
344 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
345 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
346 | * only what share bits are currently in force, but also what | |
347 | * combinations of share bits previous opens have used. This allows us | |
348 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
349 | * return an error if the client attempt to downgrade to a combination | |
350 | * of share bits not explicable by closing some of its previous opens. | |
351 | * | |
352 | * XXX: This enforcement is actually incomplete, since we don't keep | |
353 | * track of access/deny bit combinations; so, e.g., we allow: | |
354 | * | |
355 | * OPEN allow read, deny write | |
356 | * OPEN allow both, deny none | |
357 | * DOWNGRADE allow read, deny none | |
358 | * | |
359 | * which we should reject. | |
360 | */ | |
361 | static void | |
362 | set_access(unsigned int *access, unsigned long bmap) { | |
363 | int i; | |
364 | ||
365 | *access = 0; | |
366 | for (i = 1; i < 4; i++) { | |
367 | if (test_bit(i, &bmap)) | |
368 | *access |= i; | |
369 | } | |
370 | } | |
371 | ||
372 | static void | |
373 | set_deny(unsigned int *deny, unsigned long bmap) { | |
374 | int i; | |
375 | ||
376 | *deny = 0; | |
377 | for (i = 0; i < 4; i++) { | |
378 | if (test_bit(i, &bmap)) | |
379 | *deny |= i ; | |
380 | } | |
381 | } | |
382 | ||
383 | static int | |
dcef0413 | 384 | test_share(struct nfs4_ol_stateid *stp, struct nfsd4_open *open) { |
f9d7562f BF |
385 | unsigned int access, deny; |
386 | ||
387 | set_access(&access, stp->st_access_bmap); | |
388 | set_deny(&deny, stp->st_deny_bmap); | |
389 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) | |
390 | return 0; | |
391 | return 1; | |
392 | } | |
393 | ||
394 | static int nfs4_access_to_omode(u32 access) | |
395 | { | |
8f34a430 | 396 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
397 | case NFS4_SHARE_ACCESS_READ: |
398 | return O_RDONLY; | |
399 | case NFS4_SHARE_ACCESS_WRITE: | |
400 | return O_WRONLY; | |
401 | case NFS4_SHARE_ACCESS_BOTH: | |
402 | return O_RDWR; | |
403 | } | |
404 | BUG(); | |
405 | } | |
406 | ||
dcef0413 | 407 | static void unhash_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 408 | { |
dcef0413 | 409 | list_del(&stp->st_stid.sc_hash); |
529d7b2a BF |
410 | list_del(&stp->st_perfile); |
411 | list_del(&stp->st_perstateowner); | |
412 | } | |
413 | ||
dcef0413 | 414 | static void close_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 415 | { |
499f3edc | 416 | int i; |
0997b173 | 417 | |
23fcf2ec | 418 | if (stp->st_access_bmap) { |
499f3edc BF |
419 | for (i = 1; i < 4; i++) { |
420 | if (test_bit(i, &stp->st_access_bmap)) | |
421 | nfs4_file_put_access(stp->st_file, | |
422 | nfs4_access_to_omode(i)); | |
4665e2ba | 423 | __clear_bit(i, &stp->st_access_bmap); |
499f3edc | 424 | } |
23fcf2ec | 425 | } |
a96e5b90 | 426 | put_nfs4_file(stp->st_file); |
4665e2ba BF |
427 | stp->st_file = NULL; |
428 | } | |
429 | ||
dcef0413 | 430 | static void free_generic_stateid(struct nfs4_ol_stateid *stp) |
4665e2ba | 431 | { |
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)); |
38c387b5 | 443 | close_generic_stateid(stp); |
529d7b2a BF |
444 | free_generic_stateid(stp); |
445 | } | |
446 | ||
fe0750e5 | 447 | static void unhash_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 448 | { |
dcef0413 | 449 | struct nfs4_ol_stateid *stp; |
529d7b2a | 450 | |
fe0750e5 BF |
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 | ||
38c387b5 | 478 | static void unhash_open_stateid(struct nfs4_ol_stateid *stp) |
2283963f BF |
479 | { |
480 | unhash_generic_stateid(stp); | |
481 | release_stateid_lockowners(stp); | |
38c387b5 BF |
482 | close_generic_stateid(stp); |
483 | } | |
484 | ||
485 | static void release_open_stateid(struct nfs4_ol_stateid *stp) | |
486 | { | |
487 | unhash_open_stateid(stp); | |
2283963f BF |
488 | free_generic_stateid(stp); |
489 | } | |
490 | ||
fe0750e5 | 491 | static void unhash_openowner(struct nfs4_openowner *oo) |
f1d110ca | 492 | { |
dcef0413 | 493 | struct nfs4_ol_stateid *stp; |
f1d110ca | 494 | |
fe0750e5 BF |
495 | list_del(&oo->oo_owner.so_strhash); |
496 | list_del(&oo->oo_perclient); | |
497 | while (!list_empty(&oo->oo_owner.so_stateids)) { | |
498 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
dcef0413 | 499 | struct nfs4_ol_stateid, st_perstateowner); |
f044ff83 | 500 | release_open_stateid(stp); |
f1d110ca BF |
501 | } |
502 | } | |
503 | ||
fe0750e5 | 504 | static void release_openowner(struct nfs4_openowner *oo) |
f1d110ca | 505 | { |
fe0750e5 BF |
506 | unhash_openowner(oo); |
507 | list_del(&oo->oo_close_lru); | |
38c387b5 BF |
508 | if (oo->oo_last_closed_stid) |
509 | free_generic_stateid(oo->oo_last_closed_stid); | |
fe0750e5 | 510 | nfs4_free_openowner(oo); |
f1d110ca BF |
511 | } |
512 | ||
5282fd72 ME |
513 | #define SESSION_HASH_SIZE 512 |
514 | static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; | |
515 | ||
516 | static inline int | |
517 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
518 | { | |
519 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
520 | ||
521 | return sid->sequence % SESSION_HASH_SIZE; | |
522 | } | |
523 | ||
524 | static inline void | |
525 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
526 | { | |
527 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
528 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
529 | } | |
530 | ||
ec6b5d7b AA |
531 | static void |
532 | gen_sessionid(struct nfsd4_session *ses) | |
533 | { | |
534 | struct nfs4_client *clp = ses->se_client; | |
535 | struct nfsd4_sessionid *sid; | |
536 | ||
537 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
538 | sid->clientid = clp->cl_clientid; | |
539 | sid->sequence = current_sessionid++; | |
540 | sid->reserved = 0; | |
541 | } | |
542 | ||
543 | /* | |
a649637c AA |
544 | * The protocol defines ca_maxresponssize_cached to include the size of |
545 | * the rpc header, but all we need to cache is the data starting after | |
546 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
547 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
548 | * value that is the number of bytes in our cache plus a few additional | |
549 | * bytes. In order to stay on the safe side, and not promise more than | |
550 | * we can cache, those additional bytes must be the minimum possible: 24 | |
551 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
552 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
553 | * for the SEQUENCE op response: | |
554 | */ | |
555 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
556 | ||
557ce264 AA |
557 | static void |
558 | free_session_slots(struct nfsd4_session *ses) | |
559 | { | |
560 | int i; | |
561 | ||
562 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
563 | kfree(ses->se_slots[i]); | |
564 | } | |
565 | ||
a649637c | 566 | /* |
efe0cb6d BF |
567 | * We don't actually need to cache the rpc and session headers, so we |
568 | * can allocate a little less for each slot: | |
569 | */ | |
570 | static inline int slot_bytes(struct nfsd4_channel_attrs *ca) | |
571 | { | |
572 | return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
573 | } | |
574 | ||
5b6feee9 | 575 | static int nfsd4_sanitize_slot_size(u32 size) |
ec6b5d7b | 576 | { |
5b6feee9 BF |
577 | size -= NFSD_MIN_HDR_SEQ_SZ; /* We don't cache the rpc header */ |
578 | size = min_t(u32, size, NFSD_SLOT_CACHE_SIZE); | |
ec6b5d7b | 579 | |
5b6feee9 BF |
580 | return size; |
581 | } | |
ec6b5d7b | 582 | |
5b6feee9 BF |
583 | /* |
584 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c AA |
585 | * re-negotiate active sessions and reduce their slot usage to make |
586 | * rooom for new connections. For now we just fail the create session. | |
ec6b5d7b | 587 | */ |
5b6feee9 | 588 | static int nfsd4_get_drc_mem(int slotsize, u32 num) |
ec6b5d7b | 589 | { |
5b6feee9 | 590 | int avail; |
ec6b5d7b | 591 | |
5b6feee9 | 592 | num = min_t(u32, num, NFSD_MAX_SLOTS_PER_SESSION); |
5d77ddfb | 593 | |
5b6feee9 BF |
594 | spin_lock(&nfsd_drc_lock); |
595 | avail = min_t(int, NFSD_MAX_MEM_PER_SESSION, | |
596 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
597 | num = min_t(int, num, avail / slotsize); | |
598 | nfsd_drc_mem_used += num * slotsize; | |
599 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 600 | |
5b6feee9 BF |
601 | return num; |
602 | } | |
ec6b5d7b | 603 | |
5b6feee9 BF |
604 | static void nfsd4_put_drc_mem(int slotsize, int num) |
605 | { | |
4bd9b0f4 | 606 | spin_lock(&nfsd_drc_lock); |
5b6feee9 | 607 | nfsd_drc_mem_used -= slotsize * num; |
4bd9b0f4 | 608 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 609 | } |
ec6b5d7b | 610 | |
5b6feee9 BF |
611 | static struct nfsd4_session *alloc_session(int slotsize, int numslots) |
612 | { | |
613 | struct nfsd4_session *new; | |
614 | int mem, i; | |
a649637c | 615 | |
5b6feee9 BF |
616 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
617 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
618 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 619 | |
5b6feee9 BF |
620 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
621 | if (!new) | |
622 | return NULL; | |
557ce264 | 623 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 BF |
624 | for (i = 0; i < numslots; i++) { |
625 | mem = sizeof(struct nfsd4_slot) + slotsize; | |
626 | new->se_slots[i] = kzalloc(mem, GFP_KERNEL); | |
627 | if (!new->se_slots[i]) | |
557ce264 | 628 | goto out_free; |
557ce264 | 629 | } |
5b6feee9 BF |
630 | return new; |
631 | out_free: | |
632 | while (i--) | |
633 | kfree(new->se_slots[i]); | |
634 | kfree(new); | |
635 | return NULL; | |
ec6b5d7b AA |
636 | } |
637 | ||
5b6feee9 | 638 | static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, struct nfsd4_channel_attrs *req, int numslots, int slotsize) |
ec6b5d7b | 639 | { |
5b6feee9 | 640 | u32 maxrpc = nfsd_serv->sv_max_mesg; |
ec6b5d7b | 641 | |
5b6feee9 | 642 | new->maxreqs = numslots; |
d2b21743 MJ |
643 | new->maxresp_cached = min_t(u32, req->maxresp_cached, |
644 | slotsize + NFSD_MIN_HDR_SEQ_SZ); | |
5b6feee9 BF |
645 | new->maxreq_sz = min_t(u32, req->maxreq_sz, maxrpc); |
646 | new->maxresp_sz = min_t(u32, req->maxresp_sz, maxrpc); | |
647 | new->maxops = min_t(u32, req->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
648 | } | |
ec6b5d7b | 649 | |
19cf5c02 BF |
650 | static void free_conn(struct nfsd4_conn *c) |
651 | { | |
652 | svc_xprt_put(c->cn_xprt); | |
653 | kfree(c); | |
654 | } | |
ec6b5d7b | 655 | |
19cf5c02 BF |
656 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
657 | { | |
658 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
659 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 660 | |
19cf5c02 BF |
661 | spin_lock(&clp->cl_lock); |
662 | if (!list_empty(&c->cn_persession)) { | |
663 | list_del(&c->cn_persession); | |
664 | free_conn(c); | |
665 | } | |
666 | spin_unlock(&clp->cl_lock); | |
eea49806 | 667 | nfsd4_probe_callback(clp); |
19cf5c02 | 668 | } |
ec6b5d7b | 669 | |
d29c374c | 670 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 671 | { |
c7662518 | 672 | struct nfsd4_conn *conn; |
ec6b5d7b | 673 | |
c7662518 BF |
674 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
675 | if (!conn) | |
db90681d | 676 | return NULL; |
c7662518 BF |
677 | svc_xprt_get(rqstp->rq_xprt); |
678 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 679 | conn->cn_flags = flags; |
db90681d BF |
680 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
681 | return conn; | |
682 | } | |
a649637c | 683 | |
328ead28 BF |
684 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
685 | { | |
686 | conn->cn_session = ses; | |
687 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
688 | } |
689 | ||
db90681d | 690 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 691 | { |
db90681d | 692 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 693 | |
c7662518 | 694 | spin_lock(&clp->cl_lock); |
328ead28 | 695 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 696 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
697 | } |
698 | ||
21b75b01 | 699 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 700 | { |
19cf5c02 | 701 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 702 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
703 | } |
704 | ||
1d1bc8f2 | 705 | static __be32 nfsd4_new_conn(struct svc_rqst *rqstp, struct nfsd4_session *ses, u32 dir) |
ec6b5d7b | 706 | { |
db90681d | 707 | struct nfsd4_conn *conn; |
21b75b01 | 708 | int ret; |
ec6b5d7b | 709 | |
1d1bc8f2 | 710 | conn = alloc_conn(rqstp, dir); |
db90681d BF |
711 | if (!conn) |
712 | return nfserr_jukebox; | |
713 | nfsd4_hash_conn(conn, ses); | |
21b75b01 BF |
714 | ret = nfsd4_register_conn(conn); |
715 | if (ret) | |
716 | /* oops; xprt is already down: */ | |
717 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
c7662518 BF |
718 | return nfs_ok; |
719 | } | |
ec6b5d7b | 720 | |
1d1bc8f2 BF |
721 | static __be32 nfsd4_new_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_session *ses) |
722 | { | |
723 | u32 dir = NFS4_CDFC4_FORE; | |
724 | ||
725 | if (ses->se_flags & SESSION4_BACK_CHAN) | |
726 | dir |= NFS4_CDFC4_BACK; | |
727 | ||
728 | return nfsd4_new_conn(rqstp, ses, dir); | |
729 | } | |
730 | ||
731 | /* must be called under client_lock */ | |
19cf5c02 | 732 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 733 | { |
19cf5c02 BF |
734 | struct nfs4_client *clp = s->se_client; |
735 | struct nfsd4_conn *c; | |
ec6b5d7b | 736 | |
19cf5c02 BF |
737 | spin_lock(&clp->cl_lock); |
738 | while (!list_empty(&s->se_conns)) { | |
739 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
740 | list_del_init(&c->cn_persession); | |
741 | spin_unlock(&clp->cl_lock); | |
557ce264 | 742 | |
19cf5c02 BF |
743 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
744 | free_conn(c); | |
ec6b5d7b | 745 | |
19cf5c02 BF |
746 | spin_lock(&clp->cl_lock); |
747 | } | |
748 | spin_unlock(&clp->cl_lock); | |
c7662518 | 749 | } |
ec6b5d7b | 750 | |
c7662518 BF |
751 | void free_session(struct kref *kref) |
752 | { | |
753 | struct nfsd4_session *ses; | |
754 | int mem; | |
755 | ||
756 | ses = container_of(kref, struct nfsd4_session, se_ref); | |
19cf5c02 | 757 | nfsd4_del_conns(ses); |
c7662518 BF |
758 | spin_lock(&nfsd_drc_lock); |
759 | mem = ses->se_fchannel.maxreqs * slot_bytes(&ses->se_fchannel); | |
760 | nfsd_drc_mem_used -= mem; | |
761 | spin_unlock(&nfsd_drc_lock); | |
762 | free_session_slots(ses); | |
763 | kfree(ses); | |
764 | } | |
765 | ||
ac7c46f2 | 766 | static struct nfsd4_session *alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
5b6feee9 BF |
767 | { |
768 | struct nfsd4_session *new; | |
769 | struct nfsd4_channel_attrs *fchan = &cses->fore_channel; | |
770 | int numslots, slotsize; | |
c7662518 | 771 | int status; |
5b6feee9 BF |
772 | int idx; |
773 | ||
774 | /* | |
775 | * Note decreasing slot size below client's request may | |
776 | * make it difficult for client to function correctly, whereas | |
777 | * decreasing the number of slots will (just?) affect | |
778 | * performance. When short on memory we therefore prefer to | |
779 | * decrease number of slots instead of their size. | |
780 | */ | |
781 | slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached); | |
782 | numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs); | |
ced6dfe9 MJ |
783 | if (numslots < 1) |
784 | return NULL; | |
5b6feee9 BF |
785 | |
786 | new = alloc_session(slotsize, numslots); | |
787 | if (!new) { | |
788 | nfsd4_put_drc_mem(slotsize, fchan->maxreqs); | |
ac7c46f2 | 789 | return NULL; |
557ce264 | 790 | } |
5b6feee9 | 791 | init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize); |
557ce264 | 792 | |
ec6b5d7b AA |
793 | new->se_client = clp; |
794 | gen_sessionid(new); | |
ec6b5d7b | 795 | |
c7662518 BF |
796 | INIT_LIST_HEAD(&new->se_conns); |
797 | ||
ac7c46f2 | 798 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 799 | new->se_flags = cses->flags; |
8b5ce5cd | 800 | new->se_cb_prog = cses->callback_prog; |
ec6b5d7b | 801 | kref_init(&new->se_ref); |
5b6feee9 | 802 | idx = hash_sessionid(&new->se_sessionid); |
9089f1b4 | 803 | spin_lock(&client_lock); |
ec6b5d7b | 804 | list_add(&new->se_hash, &sessionid_hashtbl[idx]); |
4c649378 | 805 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 806 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 807 | spin_unlock(&clp->cl_lock); |
9089f1b4 | 808 | spin_unlock(&client_lock); |
ec6b5d7b | 809 | |
1d1bc8f2 | 810 | status = nfsd4_new_conn_from_crses(rqstp, new); |
ac7c46f2 | 811 | /* whoops: benny points out, status is ignored! (err, or bogus) */ |
c7662518 BF |
812 | if (status) { |
813 | free_session(&new->se_ref); | |
ac7c46f2 | 814 | return NULL; |
c7662518 | 815 | } |
dcbeaa68 | 816 | if (cses->flags & SESSION4_BACK_CHAN) { |
edd76786 | 817 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
818 | /* |
819 | * This is a little silly; with sessions there's no real | |
820 | * use for the callback address. Use the peer address | |
821 | * as a reasonable default for now, but consider fixing | |
822 | * the rpc client not to require an address in the | |
823 | * future: | |
824 | */ | |
edd76786 BF |
825 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
826 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 827 | } |
dcbeaa68 | 828 | nfsd4_probe_callback(clp); |
ac7c46f2 | 829 | return new; |
ec6b5d7b AA |
830 | } |
831 | ||
9089f1b4 | 832 | /* caller must hold client_lock */ |
5282fd72 ME |
833 | static struct nfsd4_session * |
834 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) | |
835 | { | |
836 | struct nfsd4_session *elem; | |
837 | int idx; | |
838 | ||
839 | dump_sessionid(__func__, sessionid); | |
840 | idx = hash_sessionid(sessionid); | |
5282fd72 ME |
841 | /* Search in the appropriate list */ |
842 | list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { | |
5282fd72 ME |
843 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
844 | NFS4_MAX_SESSIONID_LEN)) { | |
845 | return elem; | |
846 | } | |
847 | } | |
848 | ||
849 | dprintk("%s: session not found\n", __func__); | |
850 | return NULL; | |
851 | } | |
852 | ||
9089f1b4 | 853 | /* caller must hold client_lock */ |
7116ed6b | 854 | static void |
5282fd72 | 855 | unhash_session(struct nfsd4_session *ses) |
7116ed6b AA |
856 | { |
857 | list_del(&ses->se_hash); | |
4c649378 | 858 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 859 | list_del(&ses->se_perclnt); |
4c649378 | 860 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
861 | } |
862 | ||
36acb66b | 863 | /* must be called under the client_lock */ |
1da177e4 | 864 | static inline void |
36acb66b | 865 | renew_client_locked(struct nfs4_client *clp) |
1da177e4 | 866 | { |
07cd4909 BH |
867 | if (is_client_expired(clp)) { |
868 | dprintk("%s: client (clientid %08x/%08x) already expired\n", | |
869 | __func__, | |
870 | clp->cl_clientid.cl_boot, | |
871 | clp->cl_clientid.cl_id); | |
872 | return; | |
873 | } | |
874 | ||
1da177e4 LT |
875 | /* |
876 | * Move client to the end to the LRU list. | |
877 | */ | |
878 | dprintk("renewing client (clientid %08x/%08x)\n", | |
879 | clp->cl_clientid.cl_boot, | |
880 | clp->cl_clientid.cl_id); | |
881 | list_move_tail(&clp->cl_lru, &client_lru); | |
882 | clp->cl_time = get_seconds(); | |
883 | } | |
884 | ||
36acb66b BH |
885 | static inline void |
886 | renew_client(struct nfs4_client *clp) | |
887 | { | |
888 | spin_lock(&client_lock); | |
889 | renew_client_locked(clp); | |
890 | spin_unlock(&client_lock); | |
891 | } | |
892 | ||
1da177e4 LT |
893 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
894 | static int | |
895 | STALE_CLIENTID(clientid_t *clid) | |
896 | { | |
897 | if (clid->cl_boot == boot_time) | |
898 | return 0; | |
60adfc50 AA |
899 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
900 | clid->cl_boot, clid->cl_id, boot_time); | |
1da177e4 LT |
901 | return 1; |
902 | } | |
903 | ||
904 | /* | |
905 | * XXX Should we use a slab cache ? | |
906 | * This type of memory management is somewhat inefficient, but we use it | |
907 | * anyway since SETCLIENTID is not a common operation. | |
908 | */ | |
35bba9a3 | 909 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
910 | { |
911 | struct nfs4_client *clp; | |
912 | ||
35bba9a3 BF |
913 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
914 | if (clp == NULL) | |
915 | return NULL; | |
916 | clp->cl_name.data = kmalloc(name.len, GFP_KERNEL); | |
917 | if (clp->cl_name.data == NULL) { | |
918 | kfree(clp); | |
919 | return NULL; | |
1da177e4 | 920 | } |
35bba9a3 BF |
921 | memcpy(clp->cl_name.data, name.data, name.len); |
922 | clp->cl_name.len = name.len; | |
1da177e4 LT |
923 | return clp; |
924 | } | |
925 | ||
926 | static inline void | |
927 | free_client(struct nfs4_client *clp) | |
928 | { | |
792c95dd BF |
929 | while (!list_empty(&clp->cl_sessions)) { |
930 | struct nfsd4_session *ses; | |
931 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
932 | se_perclnt); | |
933 | list_del(&ses->se_perclnt); | |
934 | nfsd4_put_session(ses); | |
935 | } | |
1da177e4 LT |
936 | if (clp->cl_cred.cr_group_info) |
937 | put_group_info(clp->cl_cred.cr_group_info); | |
68e76ad0 | 938 | kfree(clp->cl_principal); |
1da177e4 LT |
939 | kfree(clp->cl_name.data); |
940 | kfree(clp); | |
941 | } | |
942 | ||
d7682988 BH |
943 | void |
944 | release_session_client(struct nfsd4_session *session) | |
945 | { | |
946 | struct nfs4_client *clp = session->se_client; | |
947 | ||
948 | if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock)) | |
949 | return; | |
950 | if (is_client_expired(clp)) { | |
951 | free_client(clp); | |
952 | session->se_client = NULL; | |
953 | } else | |
954 | renew_client_locked(clp); | |
955 | spin_unlock(&client_lock); | |
d7682988 BH |
956 | } |
957 | ||
84d38ac9 BH |
958 | /* must be called under the client_lock */ |
959 | static inline void | |
960 | unhash_client_locked(struct nfs4_client *clp) | |
961 | { | |
792c95dd BF |
962 | struct nfsd4_session *ses; |
963 | ||
07cd4909 | 964 | mark_client_expired(clp); |
84d38ac9 | 965 | list_del(&clp->cl_lru); |
4c649378 | 966 | spin_lock(&clp->cl_lock); |
792c95dd BF |
967 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
968 | list_del_init(&ses->se_hash); | |
4c649378 | 969 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
970 | } |
971 | ||
1da177e4 LT |
972 | static void |
973 | expire_client(struct nfs4_client *clp) | |
974 | { | |
fe0750e5 | 975 | struct nfs4_openowner *oo; |
1da177e4 | 976 | struct nfs4_delegation *dp; |
1da177e4 LT |
977 | struct list_head reaplist; |
978 | ||
1da177e4 LT |
979 | INIT_LIST_HEAD(&reaplist); |
980 | spin_lock(&recall_lock); | |
ea1da636 N |
981 | while (!list_empty(&clp->cl_delegations)) { |
982 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
ea1da636 | 983 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
984 | list_move(&dp->dl_recall_lru, &reaplist); |
985 | } | |
986 | spin_unlock(&recall_lock); | |
987 | while (!list_empty(&reaplist)) { | |
988 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
989 | list_del_init(&dp->dl_recall_lru); | |
990 | unhash_delegation(dp); | |
991 | } | |
ea1da636 | 992 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 BF |
993 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
994 | release_openowner(oo); | |
1da177e4 | 995 | } |
6ff8da08 | 996 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
997 | if (clp->cl_cb_conn.cb_xprt) |
998 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
36acb66b BH |
999 | list_del(&clp->cl_idhash); |
1000 | list_del(&clp->cl_strhash); | |
be1fdf6c | 1001 | spin_lock(&client_lock); |
84d38ac9 | 1002 | unhash_client_locked(clp); |
46583e25 BH |
1003 | if (atomic_read(&clp->cl_refcount) == 0) |
1004 | free_client(clp); | |
be1fdf6c | 1005 | spin_unlock(&client_lock); |
1da177e4 LT |
1006 | } |
1007 | ||
35bba9a3 BF |
1008 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
1009 | { | |
1010 | memcpy(target->cl_verifier.data, source->data, | |
1011 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
1012 | } |
1013 | ||
35bba9a3 BF |
1014 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
1015 | { | |
1da177e4 LT |
1016 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
1017 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
1018 | } | |
1019 | ||
35bba9a3 BF |
1020 | static void copy_cred(struct svc_cred *target, struct svc_cred *source) |
1021 | { | |
1da177e4 LT |
1022 | target->cr_uid = source->cr_uid; |
1023 | target->cr_gid = source->cr_gid; | |
1024 | target->cr_group_info = source->cr_group_info; | |
1025 | get_group_info(target->cr_group_info); | |
1026 | } | |
1027 | ||
35bba9a3 | 1028 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 1029 | { |
a55370a3 | 1030 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
1031 | } |
1032 | ||
1033 | static int | |
599e0a22 BF |
1034 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1035 | { | |
1036 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
1037 | } |
1038 | ||
1039 | static int | |
599e0a22 BF |
1040 | same_clid(clientid_t *cl1, clientid_t *cl2) |
1041 | { | |
1042 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1043 | } |
1044 | ||
1045 | /* XXX what about NGROUP */ | |
1046 | static int | |
599e0a22 BF |
1047 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
1048 | { | |
1049 | return cr1->cr_uid == cr2->cr_uid; | |
1da177e4 LT |
1050 | } |
1051 | ||
5ec7b46c BF |
1052 | static void gen_clid(struct nfs4_client *clp) |
1053 | { | |
1054 | static u32 current_clientid = 1; | |
1055 | ||
1da177e4 LT |
1056 | clp->cl_clientid.cl_boot = boot_time; |
1057 | clp->cl_clientid.cl_id = current_clientid++; | |
1058 | } | |
1059 | ||
deda2faa BF |
1060 | static void gen_confirm(struct nfs4_client *clp) |
1061 | { | |
1062 | static u32 i; | |
1063 | u32 *p; | |
1da177e4 | 1064 | |
1da177e4 | 1065 | p = (u32 *)clp->cl_confirm.data; |
deda2faa BF |
1066 | *p++ = get_seconds(); |
1067 | *p++ = i++; | |
1da177e4 LT |
1068 | } |
1069 | ||
4581d140 BF |
1070 | static int |
1071 | same_stateid(stateid_t *id_one, stateid_t *id_two) | |
1072 | { | |
d3b313a4 BF |
1073 | return 0 == memcmp(&id_one->si_opaque, &id_two->si_opaque, |
1074 | sizeof(stateid_opaque_t)); | |
4581d140 BF |
1075 | } |
1076 | ||
f459e453 | 1077 | static struct nfs4_stid *find_stateid(stateid_t *t) |
4581d140 | 1078 | { |
dcef0413 | 1079 | struct nfs4_stid *s; |
4581d140 BF |
1080 | unsigned int hashval; |
1081 | ||
ee626a77 | 1082 | hashval = stateid_hashval(t); |
dcef0413 BF |
1083 | list_for_each_entry(s, &stateid_hashtbl[hashval], sc_hash) |
1084 | if (same_stateid(&s->sc_stateid, t)) | |
f459e453 | 1085 | return s; |
4d71ab87 BF |
1086 | return NULL; |
1087 | } | |
1088 | ||
f459e453 BF |
1089 | static struct nfs4_stid *find_stateid_by_type(stateid_t *t, char typemask) |
1090 | { | |
1091 | struct nfs4_stid *s; | |
4d71ab87 BF |
1092 | |
1093 | s = find_stateid(t); | |
1094 | if (!s) | |
1095 | return NULL; | |
f459e453 | 1096 | if (typemask & s->sc_type) |
4581d140 | 1097 | return s; |
4581d140 BF |
1098 | return NULL; |
1099 | } | |
1100 | ||
f459e453 BF |
1101 | static struct nfs4_ol_stateid *find_ol_stateid_by_type(stateid_t *t, char typemask) |
1102 | { | |
1103 | struct nfs4_stid *s; | |
1104 | ||
1105 | s = find_stateid_by_type(t, typemask); | |
1106 | if (!s) | |
1107 | return NULL; | |
1108 | return openlockstateid(s); | |
1109 | } | |
1110 | ||
b09333c4 RL |
1111 | static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, |
1112 | struct svc_rqst *rqstp, nfs4_verifier *verf) | |
1113 | { | |
1114 | struct nfs4_client *clp; | |
1115 | struct sockaddr *sa = svc_addr(rqstp); | |
1116 | char *princ; | |
1117 | ||
1118 | clp = alloc_client(name); | |
1119 | if (clp == NULL) | |
1120 | return NULL; | |
1121 | ||
792c95dd BF |
1122 | INIT_LIST_HEAD(&clp->cl_sessions); |
1123 | ||
b09333c4 RL |
1124 | princ = svc_gss_principal(rqstp); |
1125 | if (princ) { | |
1126 | clp->cl_principal = kstrdup(princ, GFP_KERNEL); | |
1127 | if (clp->cl_principal == NULL) { | |
1128 | free_client(clp); | |
1129 | return NULL; | |
1130 | } | |
1131 | } | |
1132 | ||
1133 | memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); | |
46583e25 | 1134 | atomic_set(&clp->cl_refcount, 0); |
77a3569d | 1135 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; |
b09333c4 RL |
1136 | INIT_LIST_HEAD(&clp->cl_idhash); |
1137 | INIT_LIST_HEAD(&clp->cl_strhash); | |
1138 | INIT_LIST_HEAD(&clp->cl_openowners); | |
1139 | INIT_LIST_HEAD(&clp->cl_delegations); | |
b09333c4 | 1140 | INIT_LIST_HEAD(&clp->cl_lru); |
5ce8ba25 | 1141 | INIT_LIST_HEAD(&clp->cl_callbacks); |
6ff8da08 | 1142 | spin_lock_init(&clp->cl_lock); |
cee277d9 | 1143 | INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_do_callback_rpc); |
07cd4909 | 1144 | clp->cl_time = get_seconds(); |
b09333c4 RL |
1145 | clear_bit(0, &clp->cl_cb_slot_busy); |
1146 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1147 | copy_verf(clp, verf); | |
1148 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
1149 | clp->cl_flavor = rqstp->rq_flavor; | |
1150 | copy_cred(&clp->cl_cred, &rqstp->rq_cred); | |
1151 | gen_confirm(clp); | |
edd76786 | 1152 | clp->cl_cb_session = NULL; |
b09333c4 RL |
1153 | return clp; |
1154 | } | |
1155 | ||
35bba9a3 BF |
1156 | static int check_name(struct xdr_netobj name) |
1157 | { | |
1da177e4 LT |
1158 | if (name.len == 0) |
1159 | return 0; | |
1160 | if (name.len > NFS4_OPAQUE_LIMIT) { | |
2fdada03 | 1161 | dprintk("NFSD: check_name: name too long(%d)!\n", name.len); |
1da177e4 LT |
1162 | return 0; |
1163 | } | |
1164 | return 1; | |
1165 | } | |
1166 | ||
fd39ca9a | 1167 | static void |
1da177e4 LT |
1168 | add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) |
1169 | { | |
1170 | unsigned int idhashval; | |
1171 | ||
1172 | list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); | |
1173 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
1174 | list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); | |
36acb66b | 1175 | renew_client(clp); |
1da177e4 LT |
1176 | } |
1177 | ||
fd39ca9a | 1178 | static void |
1da177e4 LT |
1179 | move_to_confirmed(struct nfs4_client *clp) |
1180 | { | |
1181 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
1182 | unsigned int strhashval; | |
1183 | ||
1184 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
f116629d | 1185 | list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); |
a55370a3 | 1186 | strhashval = clientstr_hashval(clp->cl_recdir); |
328efbab | 1187 | list_move(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); |
1da177e4 LT |
1188 | renew_client(clp); |
1189 | } | |
1190 | ||
1191 | static struct nfs4_client * | |
1192 | find_confirmed_client(clientid_t *clid) | |
1193 | { | |
1194 | struct nfs4_client *clp; | |
1195 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1196 | ||
1197 | list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 1198 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
1199 | return clp; |
1200 | } | |
1201 | return NULL; | |
1202 | } | |
1203 | ||
1204 | static struct nfs4_client * | |
1205 | find_unconfirmed_client(clientid_t *clid) | |
1206 | { | |
1207 | struct nfs4_client *clp; | |
1208 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1209 | ||
1210 | list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 1211 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
1212 | return clp; |
1213 | } | |
1214 | return NULL; | |
1215 | } | |
1216 | ||
6e5f15c9 | 1217 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 1218 | { |
6e5f15c9 | 1219 | return clp->cl_exchange_flags != 0; |
e203d506 | 1220 | } |
a1bcecd2 | 1221 | |
28ce6054 | 1222 | static struct nfs4_client * |
e203d506 | 1223 | find_confirmed_client_by_str(const char *dname, unsigned int hashval) |
28ce6054 N |
1224 | { |
1225 | struct nfs4_client *clp; | |
1226 | ||
1227 | list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { | |
e203d506 | 1228 | if (same_name(clp->cl_recdir, dname)) |
28ce6054 N |
1229 | return clp; |
1230 | } | |
1231 | return NULL; | |
1232 | } | |
1233 | ||
1234 | static struct nfs4_client * | |
e203d506 | 1235 | find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) |
28ce6054 N |
1236 | { |
1237 | struct nfs4_client *clp; | |
1238 | ||
1239 | list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { | |
e203d506 | 1240 | if (same_name(clp->cl_recdir, dname)) |
28ce6054 N |
1241 | return clp; |
1242 | } | |
1243 | return NULL; | |
1244 | } | |
1245 | ||
fd39ca9a | 1246 | static void |
6f3d772f | 1247 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 1248 | { |
07263f1e | 1249 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
1250 | struct sockaddr *sa = svc_addr(rqstp); |
1251 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
1252 | unsigned short expected_family; |
1253 | ||
1254 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
1255 | if (se->se_callback_netid_len == 3 && | |
1256 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
1257 | expected_family = AF_INET; | |
1258 | else if (se->se_callback_netid_len == 4 && | |
1259 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
1260 | expected_family = AF_INET6; | |
1261 | else | |
1da177e4 LT |
1262 | goto out_err; |
1263 | ||
07263f1e | 1264 | conn->cb_addrlen = rpc_uaddr2sockaddr(se->se_callback_addr_val, |
aa9a4ec7 | 1265 | se->se_callback_addr_len, |
07263f1e BF |
1266 | (struct sockaddr *)&conn->cb_addr, |
1267 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 1268 | |
07263f1e | 1269 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 1270 | goto out_err; |
aa9a4ec7 | 1271 | |
07263f1e BF |
1272 | if (conn->cb_addr.ss_family == AF_INET6) |
1273 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 1274 | |
07263f1e BF |
1275 | conn->cb_prog = se->se_callback_prog; |
1276 | conn->cb_ident = se->se_callback_ident; | |
849a1cf1 | 1277 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
1da177e4 LT |
1278 | return; |
1279 | out_err: | |
07263f1e BF |
1280 | conn->cb_addr.ss_family = AF_UNSPEC; |
1281 | conn->cb_addrlen = 0; | |
849823c5 | 1282 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
1283 | "will not receive delegations\n", |
1284 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
1285 | ||
1da177e4 LT |
1286 | return; |
1287 | } | |
1288 | ||
074fe897 | 1289 | /* |
557ce264 | 1290 | * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. |
074fe897 | 1291 | */ |
074fe897 AA |
1292 | void |
1293 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) | |
074fe897 | 1294 | { |
557ce264 AA |
1295 | struct nfsd4_slot *slot = resp->cstate.slot; |
1296 | unsigned int base; | |
074fe897 | 1297 | |
557ce264 | 1298 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1299 | |
557ce264 AA |
1300 | slot->sl_opcnt = resp->opcnt; |
1301 | slot->sl_status = resp->cstate.status; | |
074fe897 | 1302 | |
bf864a31 | 1303 | if (nfsd4_not_cached(resp)) { |
557ce264 | 1304 | slot->sl_datalen = 0; |
bf864a31 | 1305 | return; |
074fe897 | 1306 | } |
557ce264 AA |
1307 | slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; |
1308 | base = (char *)resp->cstate.datap - | |
1309 | (char *)resp->xbuf->head[0].iov_base; | |
1310 | if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, | |
1311 | slot->sl_datalen)) | |
1312 | WARN("%s: sessions DRC could not cache compound\n", __func__); | |
1313 | return; | |
074fe897 AA |
1314 | } |
1315 | ||
1316 | /* | |
abfabf8c AA |
1317 | * Encode the replay sequence operation from the slot values. |
1318 | * If cachethis is FALSE encode the uncached rep error on the next | |
1319 | * operation which sets resp->p and increments resp->opcnt for | |
1320 | * nfs4svc_encode_compoundres. | |
074fe897 | 1321 | * |
074fe897 | 1322 | */ |
abfabf8c AA |
1323 | static __be32 |
1324 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
1325 | struct nfsd4_compoundres *resp) | |
074fe897 | 1326 | { |
abfabf8c AA |
1327 | struct nfsd4_op *op; |
1328 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 1329 | |
abfabf8c | 1330 | dprintk("--> %s resp->opcnt %d cachethis %u \n", __func__, |
557ce264 | 1331 | resp->opcnt, resp->cstate.slot->sl_cachethis); |
bf864a31 | 1332 | |
abfabf8c AA |
1333 | /* Encode the replayed sequence operation */ |
1334 | op = &args->ops[resp->opcnt - 1]; | |
1335 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 1336 | |
abfabf8c | 1337 | /* Return nfserr_retry_uncached_rep in next operation. */ |
557ce264 | 1338 | if (args->opcnt > 1 && slot->sl_cachethis == 0) { |
abfabf8c AA |
1339 | op = &args->ops[resp->opcnt++]; |
1340 | op->status = nfserr_retry_uncached_rep; | |
1341 | nfsd4_encode_operation(resp, op); | |
074fe897 | 1342 | } |
abfabf8c | 1343 | return op->status; |
074fe897 AA |
1344 | } |
1345 | ||
1346 | /* | |
557ce264 AA |
1347 | * The sequence operation is not cached because we can use the slot and |
1348 | * session values. | |
074fe897 AA |
1349 | */ |
1350 | __be32 | |
bf864a31 AA |
1351 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
1352 | struct nfsd4_sequence *seq) | |
074fe897 | 1353 | { |
557ce264 | 1354 | struct nfsd4_slot *slot = resp->cstate.slot; |
074fe897 AA |
1355 | __be32 status; |
1356 | ||
557ce264 | 1357 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1358 | |
abfabf8c AA |
1359 | /* Either returns 0 or nfserr_retry_uncached */ |
1360 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); | |
1361 | if (status == nfserr_retry_uncached_rep) | |
1362 | return status; | |
074fe897 | 1363 | |
557ce264 AA |
1364 | /* The sequence operation has been encoded, cstate->datap set. */ |
1365 | memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); | |
074fe897 | 1366 | |
557ce264 AA |
1367 | resp->opcnt = slot->sl_opcnt; |
1368 | resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); | |
1369 | status = slot->sl_status; | |
074fe897 AA |
1370 | |
1371 | return status; | |
1372 | } | |
1373 | ||
0733d213 AA |
1374 | /* |
1375 | * Set the exchange_id flags returned by the server. | |
1376 | */ | |
1377 | static void | |
1378 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
1379 | { | |
1380 | /* pNFS is not supported */ | |
1381 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
1382 | ||
1383 | /* Referrals are supported, Migration is not. */ | |
1384 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
1385 | ||
1386 | /* set the wire flags to return to client. */ | |
1387 | clid->flags = new->cl_exchange_flags; | |
1388 | } | |
1389 | ||
069b6ad4 AA |
1390 | __be32 |
1391 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
1392 | struct nfsd4_compound_state *cstate, | |
1393 | struct nfsd4_exchange_id *exid) | |
1394 | { | |
0733d213 AA |
1395 | struct nfs4_client *unconf, *conf, *new; |
1396 | int status; | |
1397 | unsigned int strhashval; | |
1398 | char dname[HEXDIR_LEN]; | |
363168b4 | 1399 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 1400 | nfs4_verifier verf = exid->verifier; |
363168b4 | 1401 | struct sockaddr *sa = svc_addr(rqstp); |
0733d213 | 1402 | |
363168b4 | 1403 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 1404 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 1405 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 1406 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 1407 | addr_str, exid->flags, exid->spa_how); |
0733d213 AA |
1408 | |
1409 | if (!check_name(exid->clname) || (exid->flags & ~EXCHGID4_FLAG_MASK_A)) | |
1410 | return nfserr_inval; | |
1411 | ||
1412 | /* Currently only support SP4_NONE */ | |
1413 | switch (exid->spa_how) { | |
1414 | case SP4_NONE: | |
1415 | break; | |
1416 | case SP4_SSV: | |
044bc1d4 | 1417 | return nfserr_serverfault; |
0733d213 AA |
1418 | default: |
1419 | BUG(); /* checked by xdr code */ | |
1420 | case SP4_MACH_CRED: | |
1421 | return nfserr_serverfault; /* no excuse :-/ */ | |
1422 | } | |
1423 | ||
1424 | status = nfs4_make_rec_clidname(dname, &exid->clname); | |
1425 | ||
1426 | if (status) | |
1427 | goto error; | |
1428 | ||
1429 | strhashval = clientstr_hashval(dname); | |
1430 | ||
1431 | nfs4_lock_state(); | |
1432 | status = nfs_ok; | |
1433 | ||
e203d506 | 1434 | conf = find_confirmed_client_by_str(dname, strhashval); |
0733d213 | 1435 | if (conf) { |
e203d506 BF |
1436 | if (!clp_used_exchangeid(conf)) { |
1437 | status = nfserr_clid_inuse; /* XXX: ? */ | |
1438 | goto out; | |
1439 | } | |
0733d213 AA |
1440 | if (!same_verf(&verf, &conf->cl_verifier)) { |
1441 | /* 18.35.4 case 8 */ | |
1442 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1443 | status = nfserr_not_same; | |
1444 | goto out; | |
1445 | } | |
1446 | /* Client reboot: destroy old state */ | |
1447 | expire_client(conf); | |
1448 | goto out_new; | |
1449 | } | |
1450 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { | |
1451 | /* 18.35.4 case 9 */ | |
1452 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1453 | status = nfserr_perm; | |
1454 | goto out; | |
1455 | } | |
1456 | expire_client(conf); | |
1457 | goto out_new; | |
1458 | } | |
0733d213 AA |
1459 | /* |
1460 | * Set bit when the owner id and verifier map to an already | |
1461 | * confirmed client id (18.35.3). | |
1462 | */ | |
1463 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
1464 | ||
1465 | /* | |
1466 | * Falling into 18.35.4 case 2, possible router replay. | |
1467 | * Leave confirmed record intact and return same result. | |
1468 | */ | |
1469 | copy_verf(conf, &verf); | |
1470 | new = conf; | |
1471 | goto out_copy; | |
6ddbbbfe MS |
1472 | } |
1473 | ||
1474 | /* 18.35.4 case 7 */ | |
1475 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1476 | status = nfserr_noent; | |
1477 | goto out; | |
0733d213 AA |
1478 | } |
1479 | ||
e203d506 | 1480 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
0733d213 AA |
1481 | if (unconf) { |
1482 | /* | |
1483 | * Possible retry or client restart. Per 18.35.4 case 4, | |
1484 | * a new unconfirmed record should be generated regardless | |
1485 | * of whether any properties have changed. | |
1486 | */ | |
1487 | expire_client(unconf); | |
1488 | } | |
1489 | ||
1490 | out_new: | |
1491 | /* Normal case */ | |
b09333c4 | 1492 | new = create_client(exid->clname, dname, rqstp, &verf); |
0733d213 | 1493 | if (new == NULL) { |
4731030d | 1494 | status = nfserr_jukebox; |
0733d213 AA |
1495 | goto out; |
1496 | } | |
1497 | ||
0733d213 | 1498 | gen_clid(new); |
0733d213 AA |
1499 | add_to_unconfirmed(new, strhashval); |
1500 | out_copy: | |
1501 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
1502 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
1503 | ||
38eb76a5 | 1504 | exid->seqid = 1; |
0733d213 AA |
1505 | nfsd4_set_ex_flags(new, exid); |
1506 | ||
1507 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
49557cc7 | 1508 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
1509 | status = nfs_ok; |
1510 | ||
1511 | out: | |
1512 | nfs4_unlock_state(); | |
1513 | error: | |
1514 | dprintk("nfsd4_exchange_id returns %d\n", ntohl(status)); | |
1515 | return status; | |
069b6ad4 AA |
1516 | } |
1517 | ||
b85d4c01 | 1518 | static int |
88e588d5 | 1519 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 1520 | { |
88e588d5 AA |
1521 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
1522 | slot_seqid); | |
b85d4c01 BH |
1523 | |
1524 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
1525 | if (slot_inuse) { |
1526 | if (seqid == slot_seqid) | |
b85d4c01 BH |
1527 | return nfserr_jukebox; |
1528 | else | |
1529 | return nfserr_seq_misordered; | |
1530 | } | |
1531 | /* Normal */ | |
88e588d5 | 1532 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 BH |
1533 | return nfs_ok; |
1534 | /* Replay */ | |
88e588d5 | 1535 | if (seqid == slot_seqid) |
b85d4c01 BH |
1536 | return nfserr_replay_cache; |
1537 | /* Wraparound */ | |
88e588d5 | 1538 | if (seqid == 1 && (slot_seqid + 1) == 0) |
b85d4c01 BH |
1539 | return nfs_ok; |
1540 | /* Misordered replay or misordered new request */ | |
1541 | return nfserr_seq_misordered; | |
1542 | } | |
1543 | ||
49557cc7 AA |
1544 | /* |
1545 | * Cache the create session result into the create session single DRC | |
1546 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
1547 | * Do this for solo or embedded create session operations. | |
1548 | */ | |
1549 | static void | |
1550 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
1551 | struct nfsd4_clid_slot *slot, int nfserr) | |
1552 | { | |
1553 | slot->sl_status = nfserr; | |
1554 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
1555 | } | |
1556 | ||
1557 | static __be32 | |
1558 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
1559 | struct nfsd4_clid_slot *slot) | |
1560 | { | |
1561 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
1562 | return slot->sl_status; | |
1563 | } | |
1564 | ||
1b74c25b MJ |
1565 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
1566 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
1567 | 1 + /* MIN tag is length with zero, only length */ \ | |
1568 | 3 + /* version, opcount, opcode */ \ | |
1569 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1570 | /* seqid, slotID, slotID, cache */ \ | |
1571 | 4 ) * sizeof(__be32)) | |
1572 | ||
1573 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
1574 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
1575 | 1 + /* status */ \ | |
1576 | 1 + /* MIN tag is length with zero, only length */ \ | |
1577 | 3 + /* opcount, opcode, opstatus*/ \ | |
1578 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1579 | /* seqid, slotID, slotID, slotID, status */ \ | |
1580 | 5 ) * sizeof(__be32)) | |
1581 | ||
1582 | static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs fchannel) | |
1583 | { | |
1584 | return fchannel.maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ | |
1585 | || fchannel.maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ; | |
1586 | } | |
1587 | ||
069b6ad4 AA |
1588 | __be32 |
1589 | nfsd4_create_session(struct svc_rqst *rqstp, | |
1590 | struct nfsd4_compound_state *cstate, | |
1591 | struct nfsd4_create_session *cr_ses) | |
1592 | { | |
363168b4 | 1593 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 1594 | struct nfs4_client *conf, *unconf; |
ac7c46f2 | 1595 | struct nfsd4_session *new; |
49557cc7 | 1596 | struct nfsd4_clid_slot *cs_slot = NULL; |
86c3e16c | 1597 | bool confirm_me = false; |
ec6b5d7b AA |
1598 | int status = 0; |
1599 | ||
a62573dc MJ |
1600 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
1601 | return nfserr_inval; | |
1602 | ||
ec6b5d7b AA |
1603 | nfs4_lock_state(); |
1604 | unconf = find_unconfirmed_client(&cr_ses->clientid); | |
1605 | conf = find_confirmed_client(&cr_ses->clientid); | |
1606 | ||
1607 | if (conf) { | |
49557cc7 AA |
1608 | cs_slot = &conf->cl_cs_slot; |
1609 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 1610 | if (status == nfserr_replay_cache) { |
ec6b5d7b | 1611 | dprintk("Got a create_session replay! seqid= %d\n", |
49557cc7 | 1612 | cs_slot->sl_seqid); |
38eb76a5 | 1613 | /* Return the cached reply status */ |
49557cc7 | 1614 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
38eb76a5 | 1615 | goto out; |
49557cc7 | 1616 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b AA |
1617 | status = nfserr_seq_misordered; |
1618 | dprintk("Sequence misordered!\n"); | |
1619 | dprintk("Expected seqid= %d but got seqid= %d\n", | |
49557cc7 | 1620 | cs_slot->sl_seqid, cr_ses->seqid); |
ec6b5d7b AA |
1621 | goto out; |
1622 | } | |
ec6b5d7b AA |
1623 | } else if (unconf) { |
1624 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || | |
363168b4 | 1625 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b AA |
1626 | status = nfserr_clid_inuse; |
1627 | goto out; | |
1628 | } | |
1629 | ||
49557cc7 AA |
1630 | cs_slot = &unconf->cl_cs_slot; |
1631 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
1632 | if (status) { |
1633 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 1634 | status = nfserr_seq_misordered; |
cd5b8144 | 1635 | goto out; |
ec6b5d7b AA |
1636 | } |
1637 | ||
86c3e16c | 1638 | confirm_me = true; |
ec6b5d7b AA |
1639 | conf = unconf; |
1640 | } else { | |
1641 | status = nfserr_stale_clientid; | |
1642 | goto out; | |
1643 | } | |
1644 | ||
8323c3b2 BF |
1645 | /* |
1646 | * XXX: we should probably set this at creation time, and check | |
1647 | * for consistent minorversion use throughout: | |
1648 | */ | |
1649 | conf->cl_minorversion = 1; | |
408b79bc BF |
1650 | /* |
1651 | * We do not support RDMA or persistent sessions | |
1652 | */ | |
1653 | cr_ses->flags &= ~SESSION4_PERSIST; | |
1654 | cr_ses->flags &= ~SESSION4_RDMA; | |
1655 | ||
1b74c25b MJ |
1656 | status = nfserr_toosmall; |
1657 | if (check_forechannel_attrs(cr_ses->fore_channel)) | |
1658 | goto out; | |
1659 | ||
ac7c46f2 BF |
1660 | status = nfserr_jukebox; |
1661 | new = alloc_init_session(rqstp, conf, cr_ses); | |
1662 | if (!new) | |
ec6b5d7b | 1663 | goto out; |
ac7c46f2 BF |
1664 | status = nfs_ok; |
1665 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, | |
ec6b5d7b | 1666 | NFS4_MAX_SESSIONID_LEN); |
12050657 MJ |
1667 | memcpy(&cr_ses->fore_channel, &new->se_fchannel, |
1668 | sizeof(struct nfsd4_channel_attrs)); | |
86c3e16c | 1669 | cs_slot->sl_seqid++; |
49557cc7 | 1670 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 1671 | |
49557cc7 AA |
1672 | /* cache solo and embedded create sessions under the state lock */ |
1673 | nfsd4_cache_create_session(cr_ses, cs_slot, status); | |
86c3e16c BF |
1674 | if (confirm_me) |
1675 | move_to_confirmed(conf); | |
ec6b5d7b AA |
1676 | out: |
1677 | nfs4_unlock_state(); | |
1678 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1679 | return status; | |
069b6ad4 AA |
1680 | } |
1681 | ||
57716355 BF |
1682 | static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) |
1683 | { | |
1684 | struct nfsd4_compoundres *resp = rqstp->rq_resp; | |
1685 | struct nfsd4_compoundargs *argp = rqstp->rq_argp; | |
1686 | ||
1687 | return argp->opcnt == resp->opcnt; | |
1688 | } | |
1689 | ||
1d1bc8f2 BF |
1690 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
1691 | { | |
1692 | switch (*dir) { | |
1693 | case NFS4_CDFC4_FORE: | |
1694 | case NFS4_CDFC4_BACK: | |
1695 | return nfs_ok; | |
1696 | case NFS4_CDFC4_FORE_OR_BOTH: | |
1697 | case NFS4_CDFC4_BACK_OR_BOTH: | |
1698 | *dir = NFS4_CDFC4_BOTH; | |
1699 | return nfs_ok; | |
1700 | }; | |
1701 | return nfserr_inval; | |
1702 | } | |
1703 | ||
1704 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, | |
1705 | struct nfsd4_compound_state *cstate, | |
1706 | struct nfsd4_bind_conn_to_session *bcts) | |
1707 | { | |
1708 | __be32 status; | |
1709 | ||
1710 | if (!nfsd4_last_compound_op(rqstp)) | |
1711 | return nfserr_not_only_op; | |
1712 | spin_lock(&client_lock); | |
1713 | cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid); | |
1714 | /* Sorta weird: we only need the refcnt'ing because new_conn acquires | |
1715 | * client_lock iself: */ | |
1716 | if (cstate->session) { | |
1717 | nfsd4_get_session(cstate->session); | |
1718 | atomic_inc(&cstate->session->se_client->cl_refcount); | |
1719 | } | |
1720 | spin_unlock(&client_lock); | |
1721 | if (!cstate->session) | |
1722 | return nfserr_badsession; | |
1723 | ||
1724 | status = nfsd4_map_bcts_dir(&bcts->dir); | |
1db2b9dd BS |
1725 | if (!status) |
1726 | nfsd4_new_conn(rqstp, cstate->session, bcts->dir); | |
1727 | return status; | |
1d1bc8f2 BF |
1728 | } |
1729 | ||
5d4cec2f BF |
1730 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
1731 | { | |
1732 | if (!session) | |
1733 | return 0; | |
1734 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
1735 | } | |
1736 | ||
069b6ad4 AA |
1737 | __be32 |
1738 | nfsd4_destroy_session(struct svc_rqst *r, | |
1739 | struct nfsd4_compound_state *cstate, | |
1740 | struct nfsd4_destroy_session *sessionid) | |
1741 | { | |
e10e0cfc BH |
1742 | struct nfsd4_session *ses; |
1743 | u32 status = nfserr_badsession; | |
1744 | ||
1745 | /* Notes: | |
1746 | * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid | |
1747 | * - Should we return nfserr_back_chan_busy if waiting for | |
1748 | * callbacks on to-be-destroyed session? | |
1749 | * - Do we need to clear any callback info from previous session? | |
1750 | */ | |
1751 | ||
5d4cec2f | 1752 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 BF |
1753 | if (!nfsd4_last_compound_op(r)) |
1754 | return nfserr_not_only_op; | |
1755 | } | |
e10e0cfc | 1756 | dump_sessionid(__func__, &sessionid->sessionid); |
9089f1b4 | 1757 | spin_lock(&client_lock); |
e10e0cfc BH |
1758 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid); |
1759 | if (!ses) { | |
9089f1b4 | 1760 | spin_unlock(&client_lock); |
e10e0cfc BH |
1761 | goto out; |
1762 | } | |
1763 | ||
1764 | unhash_session(ses); | |
9089f1b4 | 1765 | spin_unlock(&client_lock); |
e10e0cfc | 1766 | |
ab707e15 | 1767 | nfs4_lock_state(); |
84f5f7cc | 1768 | nfsd4_probe_callback_sync(ses->se_client); |
ab707e15 | 1769 | nfs4_unlock_state(); |
19cf5c02 BF |
1770 | |
1771 | nfsd4_del_conns(ses); | |
1772 | ||
e10e0cfc BH |
1773 | nfsd4_put_session(ses); |
1774 | status = nfs_ok; | |
1775 | out: | |
1776 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1777 | return status; | |
069b6ad4 AA |
1778 | } |
1779 | ||
a663bdd8 | 1780 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
1781 | { |
1782 | struct nfsd4_conn *c; | |
1783 | ||
1784 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 1785 | if (c->cn_xprt == xpt) { |
328ead28 BF |
1786 | return c; |
1787 | } | |
1788 | } | |
1789 | return NULL; | |
1790 | } | |
1791 | ||
a663bdd8 | 1792 | static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
1793 | { |
1794 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 1795 | struct nfsd4_conn *c; |
21b75b01 | 1796 | int ret; |
328ead28 BF |
1797 | |
1798 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 1799 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
328ead28 BF |
1800 | if (c) { |
1801 | spin_unlock(&clp->cl_lock); | |
1802 | free_conn(new); | |
1803 | return; | |
1804 | } | |
1805 | __nfsd4_hash_conn(new, ses); | |
1806 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
1807 | ret = nfsd4_register_conn(new); |
1808 | if (ret) | |
1809 | /* oops; xprt is already down: */ | |
1810 | nfsd4_conn_lost(&new->cn_xpt_user); | |
328ead28 BF |
1811 | return; |
1812 | } | |
1813 | ||
868b89c3 MJ |
1814 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
1815 | { | |
1816 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
1817 | ||
1818 | return args->opcnt > session->se_fchannel.maxops; | |
1819 | } | |
1820 | ||
ae82a8d0 MJ |
1821 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
1822 | struct nfsd4_session *session) | |
1823 | { | |
1824 | struct xdr_buf *xb = &rqstp->rq_arg; | |
1825 | ||
1826 | return xb->len > session->se_fchannel.maxreq_sz; | |
1827 | } | |
1828 | ||
069b6ad4 | 1829 | __be32 |
b85d4c01 | 1830 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
1831 | struct nfsd4_compound_state *cstate, |
1832 | struct nfsd4_sequence *seq) | |
1833 | { | |
f9bb94c4 | 1834 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
b85d4c01 BH |
1835 | struct nfsd4_session *session; |
1836 | struct nfsd4_slot *slot; | |
a663bdd8 | 1837 | struct nfsd4_conn *conn; |
b85d4c01 BH |
1838 | int status; |
1839 | ||
f9bb94c4 AA |
1840 | if (resp->opcnt != 1) |
1841 | return nfserr_sequence_pos; | |
1842 | ||
a663bdd8 BF |
1843 | /* |
1844 | * Will be either used or freed by nfsd4_sequence_check_conn | |
1845 | * below. | |
1846 | */ | |
1847 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
1848 | if (!conn) | |
1849 | return nfserr_jukebox; | |
1850 | ||
9089f1b4 | 1851 | spin_lock(&client_lock); |
b85d4c01 BH |
1852 | status = nfserr_badsession; |
1853 | session = find_in_sessionid_hashtbl(&seq->sessionid); | |
1854 | if (!session) | |
1855 | goto out; | |
1856 | ||
868b89c3 MJ |
1857 | status = nfserr_too_many_ops; |
1858 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
1859 | goto out; | |
1860 | ||
ae82a8d0 MJ |
1861 | status = nfserr_req_too_big; |
1862 | if (nfsd4_request_too_big(rqstp, session)) | |
1863 | goto out; | |
1864 | ||
b85d4c01 | 1865 | status = nfserr_badslot; |
6c18ba9f | 1866 | if (seq->slotid >= session->se_fchannel.maxreqs) |
b85d4c01 BH |
1867 | goto out; |
1868 | ||
557ce264 | 1869 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
1870 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
1871 | ||
a8dfdaeb AA |
1872 | /* We do not negotiate the number of slots yet, so set the |
1873 | * maxslots to the session maxreqs which is used to encode | |
1874 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
1875 | seq->maxslots = session->se_fchannel.maxreqs; | |
1876 | ||
88e588d5 | 1877 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, slot->sl_inuse); |
b85d4c01 BH |
1878 | if (status == nfserr_replay_cache) { |
1879 | cstate->slot = slot; | |
1880 | cstate->session = session; | |
da3846a2 | 1881 | /* Return the cached reply status and set cstate->status |
557ce264 | 1882 | * for nfsd4_proc_compound processing */ |
bf864a31 | 1883 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 1884 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 1885 | goto out; |
b85d4c01 BH |
1886 | } |
1887 | if (status) | |
1888 | goto out; | |
1889 | ||
a663bdd8 BF |
1890 | nfsd4_sequence_check_conn(conn, session); |
1891 | conn = NULL; | |
328ead28 | 1892 | |
b85d4c01 BH |
1893 | /* Success! bump slot seqid */ |
1894 | slot->sl_inuse = true; | |
1895 | slot->sl_seqid = seq->seqid; | |
557ce264 | 1896 | slot->sl_cachethis = seq->cachethis; |
b85d4c01 BH |
1897 | |
1898 | cstate->slot = slot; | |
1899 | cstate->session = session; | |
1900 | ||
b85d4c01 | 1901 | out: |
26c0c75e | 1902 | /* Hold a session reference until done processing the compound. */ |
aaf84eb9 | 1903 | if (cstate->session) { |
0d7bb719 BF |
1904 | struct nfs4_client *clp = session->se_client; |
1905 | ||
36acb66b | 1906 | nfsd4_get_session(cstate->session); |
0d7bb719 BF |
1907 | atomic_inc(&clp->cl_refcount); |
1908 | if (clp->cl_cb_state == NFSD4_CB_DOWN) | |
1909 | seq->status_flags |= SEQ4_STATUS_CB_PATH_DOWN; | |
aaf84eb9 | 1910 | } |
a663bdd8 | 1911 | kfree(conn); |
36acb66b | 1912 | spin_unlock(&client_lock); |
b85d4c01 BH |
1913 | dprintk("%s: return %d\n", __func__, ntohl(status)); |
1914 | return status; | |
069b6ad4 AA |
1915 | } |
1916 | ||
4dc6ec00 BF |
1917 | __be32 |
1918 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
1919 | { | |
bcecf1cc MJ |
1920 | int status = 0; |
1921 | ||
4dc6ec00 BF |
1922 | if (rc->rca_one_fs) { |
1923 | if (!cstate->current_fh.fh_dentry) | |
1924 | return nfserr_nofilehandle; | |
1925 | /* | |
1926 | * We don't take advantage of the rca_one_fs case. | |
1927 | * That's OK, it's optional, we can safely ignore it. | |
1928 | */ | |
1929 | return nfs_ok; | |
1930 | } | |
bcecf1cc | 1931 | |
4dc6ec00 | 1932 | nfs4_lock_state(); |
bcecf1cc MJ |
1933 | status = nfserr_complete_already; |
1934 | if (cstate->session->se_client->cl_firststate) | |
1935 | goto out; | |
1936 | ||
1937 | status = nfserr_stale_clientid; | |
1938 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
1939 | /* |
1940 | * The following error isn't really legal. | |
1941 | * But we only get here if the client just explicitly | |
1942 | * destroyed the client. Surely it no longer cares what | |
1943 | * error it gets back on an operation for the dead | |
1944 | * client. | |
1945 | */ | |
bcecf1cc MJ |
1946 | goto out; |
1947 | ||
1948 | status = nfs_ok; | |
4dc6ec00 | 1949 | nfsd4_create_clid_dir(cstate->session->se_client); |
bcecf1cc | 1950 | out: |
4dc6ec00 | 1951 | nfs4_unlock_state(); |
bcecf1cc | 1952 | return status; |
4dc6ec00 BF |
1953 | } |
1954 | ||
b37ad28b | 1955 | __be32 |
b591480b BF |
1956 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
1957 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 1958 | { |
1da177e4 LT |
1959 | struct xdr_netobj clname = { |
1960 | .len = setclid->se_namelen, | |
1961 | .data = setclid->se_name, | |
1962 | }; | |
1963 | nfs4_verifier clverifier = setclid->se_verf; | |
1964 | unsigned int strhashval; | |
28ce6054 | 1965 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 1966 | __be32 status; |
a55370a3 | 1967 | char dname[HEXDIR_LEN]; |
1da177e4 | 1968 | |
1da177e4 | 1969 | if (!check_name(clname)) |
73aea4ec | 1970 | return nfserr_inval; |
1da177e4 | 1971 | |
a55370a3 N |
1972 | status = nfs4_make_rec_clidname(dname, &clname); |
1973 | if (status) | |
73aea4ec | 1974 | return status; |
a55370a3 | 1975 | |
1da177e4 LT |
1976 | /* |
1977 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
1978 | * We get here on a DRC miss. | |
1979 | */ | |
1980 | ||
a55370a3 | 1981 | strhashval = clientstr_hashval(dname); |
1da177e4 | 1982 | |
1da177e4 | 1983 | nfs4_lock_state(); |
e203d506 | 1984 | conf = find_confirmed_client_by_str(dname, strhashval); |
28ce6054 | 1985 | if (conf) { |
a186e767 | 1986 | /* RFC 3530 14.2.33 CASE 0: */ |
1da177e4 | 1987 | status = nfserr_clid_inuse; |
e203d506 BF |
1988 | if (clp_used_exchangeid(conf)) |
1989 | goto out; | |
026722c2 | 1990 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
1991 | char addr_str[INET6_ADDRSTRLEN]; |
1992 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
1993 | sizeof(addr_str)); | |
1994 | dprintk("NFSD: setclientid: string in use by client " | |
1995 | "at %s\n", addr_str); | |
1da177e4 LT |
1996 | goto out; |
1997 | } | |
1da177e4 | 1998 | } |
a186e767 BF |
1999 | /* |
2000 | * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") | |
2001 | * has a description of SETCLIENTID request processing consisting | |
2002 | * of 5 bullet points, labeled as CASE0 - CASE4 below. | |
2003 | */ | |
e203d506 | 2004 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
3e772463 | 2005 | status = nfserr_jukebox; |
1da177e4 | 2006 | if (!conf) { |
a186e767 BF |
2007 | /* |
2008 | * RFC 3530 14.2.33 CASE 4: | |
2009 | * placed first, because it is the normal case | |
1da177e4 LT |
2010 | */ |
2011 | if (unconf) | |
2012 | expire_client(unconf); | |
b09333c4 | 2013 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 2014 | if (new == NULL) |
1da177e4 | 2015 | goto out; |
1da177e4 | 2016 | gen_clid(new); |
599e0a22 | 2017 | } else if (same_verf(&conf->cl_verifier, &clverifier)) { |
1da177e4 | 2018 | /* |
a186e767 BF |
2019 | * RFC 3530 14.2.33 CASE 1: |
2020 | * probable callback update | |
1da177e4 | 2021 | */ |
31f4a6c1 N |
2022 | if (unconf) { |
2023 | /* Note this is removing unconfirmed {*x***}, | |
2024 | * which is stronger than RFC recommended {vxc**}. | |
2025 | * This has the advantage that there is at most | |
2026 | * one {*x***} in either list at any time. | |
2027 | */ | |
2028 | expire_client(unconf); | |
1da177e4 | 2029 | } |
b09333c4 | 2030 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 2031 | if (new == NULL) |
1da177e4 | 2032 | goto out; |
1da177e4 | 2033 | copy_clid(new, conf); |
1da177e4 LT |
2034 | } else if (!unconf) { |
2035 | /* | |
a186e767 BF |
2036 | * RFC 3530 14.2.33 CASE 2: |
2037 | * probable client reboot; state will be removed if | |
2038 | * confirmed. | |
1da177e4 | 2039 | */ |
b09333c4 | 2040 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 2041 | if (new == NULL) |
1da177e4 | 2042 | goto out; |
1da177e4 | 2043 | gen_clid(new); |
49ba8781 | 2044 | } else { |
a186e767 BF |
2045 | /* |
2046 | * RFC 3530 14.2.33 CASE 3: | |
2047 | * probable client reboot; state will be removed if | |
2048 | * confirmed. | |
1da177e4 LT |
2049 | */ |
2050 | expire_client(unconf); | |
b09333c4 | 2051 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 2052 | if (new == NULL) |
1da177e4 | 2053 | goto out; |
1da177e4 | 2054 | gen_clid(new); |
1da177e4 | 2055 | } |
8323c3b2 BF |
2056 | /* |
2057 | * XXX: we should probably set this at creation time, and check | |
2058 | * for consistent minorversion use throughout: | |
2059 | */ | |
2060 | new->cl_minorversion = 0; | |
6f3d772f | 2061 | gen_callback(new, setclid, rqstp); |
c175b83c | 2062 | add_to_unconfirmed(new, strhashval); |
1da177e4 LT |
2063 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
2064 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
2065 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
2066 | status = nfs_ok; | |
2067 | out: | |
2068 | nfs4_unlock_state(); | |
2069 | return status; | |
2070 | } | |
2071 | ||
2072 | ||
2073 | /* | |
a186e767 BF |
2074 | * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has |
2075 | * a description of SETCLIENTID_CONFIRM request processing consisting of 4 | |
2076 | * bullets, labeled as CASE1 - CASE4 below. | |
1da177e4 | 2077 | */ |
b37ad28b | 2078 | __be32 |
b591480b BF |
2079 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
2080 | struct nfsd4_compound_state *cstate, | |
2081 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 2082 | { |
363168b4 | 2083 | struct sockaddr *sa = svc_addr(rqstp); |
21ab45a4 | 2084 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
2085 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
2086 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 2087 | __be32 status; |
1da177e4 LT |
2088 | |
2089 | if (STALE_CLIENTID(clid)) | |
2090 | return nfserr_stale_clientid; | |
2091 | /* | |
2092 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
2093 | * We get here on a DRC miss. | |
2094 | */ | |
2095 | ||
2096 | nfs4_lock_state(); | |
21ab45a4 N |
2097 | |
2098 | conf = find_confirmed_client(clid); | |
2099 | unconf = find_unconfirmed_client(clid); | |
2100 | ||
2101 | status = nfserr_clid_inuse; | |
363168b4 | 2102 | if (conf && !rpc_cmp_addr((struct sockaddr *) &conf->cl_addr, sa)) |
21ab45a4 | 2103 | goto out; |
363168b4 | 2104 | if (unconf && !rpc_cmp_addr((struct sockaddr *) &unconf->cl_addr, sa)) |
21ab45a4 N |
2105 | goto out; |
2106 | ||
a186e767 BF |
2107 | /* |
2108 | * section 14.2.34 of RFC 3530 has a description of | |
2109 | * SETCLIENTID_CONFIRM request processing consisting | |
2110 | * of 4 bullet points, labeled as CASE1 - CASE4 below. | |
2111 | */ | |
366e0c1d | 2112 | if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { |
a186e767 BF |
2113 | /* |
2114 | * RFC 3530 14.2.34 CASE 1: | |
2115 | * callback update | |
2116 | */ | |
599e0a22 | 2117 | if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) |
1da177e4 LT |
2118 | status = nfserr_clid_inuse; |
2119 | else { | |
5a3c9d71 BF |
2120 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
2121 | nfsd4_probe_callback(conf); | |
1a69c179 | 2122 | expire_client(unconf); |
1da177e4 | 2123 | status = nfs_ok; |
1a69c179 | 2124 | |
1da177e4 | 2125 | } |
f3aba4e5 | 2126 | } else if (conf && !unconf) { |
a186e767 BF |
2127 | /* |
2128 | * RFC 3530 14.2.34 CASE 2: | |
2129 | * probable retransmitted request; play it safe and | |
2130 | * do nothing. | |
7c79f737 | 2131 | */ |
599e0a22 | 2132 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) |
1da177e4 | 2133 | status = nfserr_clid_inuse; |
21ab45a4 | 2134 | else |
1da177e4 | 2135 | status = nfs_ok; |
7c79f737 | 2136 | } else if (!conf && unconf |
599e0a22 | 2137 | && same_verf(&unconf->cl_confirm, &confirm)) { |
a186e767 BF |
2138 | /* |
2139 | * RFC 3530 14.2.34 CASE 3: | |
2140 | * Normal case; new or rebooted client: | |
7c79f737 | 2141 | */ |
599e0a22 | 2142 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { |
1da177e4 LT |
2143 | status = nfserr_clid_inuse; |
2144 | } else { | |
1a69c179 N |
2145 | unsigned int hash = |
2146 | clientstr_hashval(unconf->cl_recdir); | |
2147 | conf = find_confirmed_client_by_str(unconf->cl_recdir, | |
e203d506 | 2148 | hash); |
1a69c179 | 2149 | if (conf) { |
c7b9a459 | 2150 | nfsd4_remove_clid_dir(conf); |
1a69c179 N |
2151 | expire_client(conf); |
2152 | } | |
1da177e4 | 2153 | move_to_confirmed(unconf); |
21ab45a4 | 2154 | conf = unconf; |
5a3c9d71 | 2155 | nfsd4_probe_callback(conf); |
1a69c179 | 2156 | status = nfs_ok; |
1da177e4 | 2157 | } |
599e0a22 BF |
2158 | } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) |
2159 | && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, | |
7c79f737 | 2160 | &confirm)))) { |
a186e767 BF |
2161 | /* |
2162 | * RFC 3530 14.2.34 CASE 4: | |
2163 | * Client probably hasn't noticed that we rebooted yet. | |
7c79f737 | 2164 | */ |
1da177e4 | 2165 | status = nfserr_stale_clientid; |
7c79f737 | 2166 | } else { |
08e8987c N |
2167 | /* check that we have hit one of the cases...*/ |
2168 | status = nfserr_clid_inuse; | |
2169 | } | |
1da177e4 | 2170 | out: |
1da177e4 LT |
2171 | nfs4_unlock_state(); |
2172 | return status; | |
2173 | } | |
2174 | ||
1da177e4 LT |
2175 | /* OPEN Share state helper functions */ |
2176 | static inline struct nfs4_file * | |
2177 | alloc_init_file(struct inode *ino) | |
2178 | { | |
2179 | struct nfs4_file *fp; | |
2180 | unsigned int hashval = file_hashval(ino); | |
2181 | ||
e60d4398 N |
2182 | fp = kmem_cache_alloc(file_slab, GFP_KERNEL); |
2183 | if (fp) { | |
8b671b80 | 2184 | atomic_set(&fp->fi_ref, 1); |
1da177e4 | 2185 | INIT_LIST_HEAD(&fp->fi_hash); |
8beefa24 N |
2186 | INIT_LIST_HEAD(&fp->fi_stateids); |
2187 | INIT_LIST_HEAD(&fp->fi_delegations); | |
1da177e4 | 2188 | fp->fi_inode = igrab(ino); |
47f9940c | 2189 | fp->fi_had_conflict = false; |
acfdf5c3 | 2190 | fp->fi_lease = NULL; |
f9d7562f BF |
2191 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); |
2192 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
47cee541 PE |
2193 | spin_lock(&recall_lock); |
2194 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); | |
2195 | spin_unlock(&recall_lock); | |
1da177e4 LT |
2196 | return fp; |
2197 | } | |
2198 | return NULL; | |
2199 | } | |
2200 | ||
e60d4398 | 2201 | static void |
e18b890b | 2202 | nfsd4_free_slab(struct kmem_cache **slab) |
1da177e4 | 2203 | { |
e60d4398 N |
2204 | if (*slab == NULL) |
2205 | return; | |
1a1d92c1 | 2206 | kmem_cache_destroy(*slab); |
e60d4398 | 2207 | *slab = NULL; |
1da177e4 LT |
2208 | } |
2209 | ||
e8ff2a84 | 2210 | void |
1da177e4 LT |
2211 | nfsd4_free_slabs(void) |
2212 | { | |
fe0750e5 BF |
2213 | nfsd4_free_slab(&openowner_slab); |
2214 | nfsd4_free_slab(&lockowner_slab); | |
e60d4398 | 2215 | nfsd4_free_slab(&file_slab); |
5ac049ac | 2216 | nfsd4_free_slab(&stateid_slab); |
5b2d21c1 | 2217 | nfsd4_free_slab(&deleg_slab); |
e60d4398 | 2218 | } |
1da177e4 | 2219 | |
e60d4398 N |
2220 | static int |
2221 | nfsd4_init_slabs(void) | |
2222 | { | |
fe0750e5 BF |
2223 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
2224 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2225 | if (openowner_slab == NULL) | |
2226 | goto out_nomem; | |
2227 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", | |
2228 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2229 | if (lockowner_slab == NULL) | |
e60d4398 N |
2230 | goto out_nomem; |
2231 | file_slab = kmem_cache_create("nfsd4_files", | |
20c2df83 | 2232 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 N |
2233 | if (file_slab == NULL) |
2234 | goto out_nomem; | |
5ac049ac | 2235 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
dcef0413 | 2236 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
5ac049ac N |
2237 | if (stateid_slab == NULL) |
2238 | goto out_nomem; | |
5b2d21c1 | 2239 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 2240 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 N |
2241 | if (deleg_slab == NULL) |
2242 | goto out_nomem; | |
e60d4398 N |
2243 | return 0; |
2244 | out_nomem: | |
2245 | nfsd4_free_slabs(); | |
2246 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | |
2247 | return -ENOMEM; | |
1da177e4 LT |
2248 | } |
2249 | ||
fe0750e5 BF |
2250 | void nfs4_free_openowner(struct nfs4_openowner *oo) |
2251 | { | |
2252 | kfree(oo->oo_owner.so_owner.data); | |
2253 | kmem_cache_free(openowner_slab, oo); | |
2254 | } | |
2255 | ||
2256 | void nfs4_free_lockowner(struct nfs4_lockowner *lo) | |
1da177e4 | 2257 | { |
fe0750e5 BF |
2258 | kfree(lo->lo_owner.so_owner.data); |
2259 | kmem_cache_free(lockowner_slab, lo); | |
1da177e4 LT |
2260 | } |
2261 | ||
ff194bd9 | 2262 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 2263 | { |
ff194bd9 BF |
2264 | rp->rp_status = nfserr_serverfault; |
2265 | rp->rp_buflen = 0; | |
2266 | rp->rp_buf = rp->rp_ibuf; | |
1da177e4 LT |
2267 | } |
2268 | ||
fe0750e5 | 2269 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 2270 | { |
1da177e4 | 2271 | struct nfs4_stateowner *sop; |
1da177e4 | 2272 | |
fe0750e5 | 2273 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
2274 | if (!sop) |
2275 | return NULL; | |
2276 | ||
2277 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); | |
2278 | if (!sop->so_owner.data) { | |
fe0750e5 | 2279 | kmem_cache_free(slab, sop); |
1da177e4 | 2280 | return NULL; |
ff194bd9 BF |
2281 | } |
2282 | sop->so_owner.len = owner->len; | |
2283 | ||
ea1da636 | 2284 | INIT_LIST_HEAD(&sop->so_stateids); |
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 | 2291 | { |
fe0750e5 BF |
2292 | list_add(&oo->oo_owner.so_strhash, &open_ownerstr_hashtbl[strhashval]); |
2293 | list_add(&oo->oo_perclient, &clp->cl_openowners); | |
ff194bd9 BF |
2294 | } |
2295 | ||
fe0750e5 | 2296 | static struct nfs4_openowner * |
ff194bd9 | 2297 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { |
fe0750e5 | 2298 | struct nfs4_openowner *oo; |
ff194bd9 | 2299 | |
fe0750e5 BF |
2300 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
2301 | if (!oo) | |
ff194bd9 | 2302 | return NULL; |
fe0750e5 BF |
2303 | oo->oo_owner.so_is_open_owner = 1; |
2304 | oo->oo_owner.so_seqid = open->op_seqid; | |
dad1c067 | 2305 | oo->oo_flags = 0; |
fe0750e5 | 2306 | oo->oo_time = 0; |
38c387b5 | 2307 | oo->oo_last_closed_stid = NULL; |
fe0750e5 BF |
2308 | INIT_LIST_HEAD(&oo->oo_close_lru); |
2309 | hash_openowner(oo, clp, strhashval); | |
2310 | return oo; | |
1da177e4 LT |
2311 | } |
2312 | ||
1da177e4 | 2313 | static inline void |
dcef0413 | 2314 | init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { |
fe0750e5 | 2315 | struct nfs4_openowner *oo = open->op_openowner; |
d3b313a4 | 2316 | struct nfs4_client *clp = oo->oo_owner.so_client; |
1da177e4 | 2317 | |
ea1da636 | 2318 | INIT_LIST_HEAD(&stp->st_lockowners); |
fe0750e5 | 2319 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); |
8beefa24 | 2320 | list_add(&stp->st_perfile, &fp->fi_stateids); |
dcef0413 | 2321 | stp->st_stid.sc_type = NFS4_OPEN_STID; |
fe0750e5 | 2322 | stp->st_stateowner = &oo->oo_owner; |
13cd2184 | 2323 | get_nfs4_file(fp); |
1da177e4 | 2324 | stp->st_file = fp; |
d3b313a4 BF |
2325 | stp->st_stid.sc_stateid.si_opaque.so_clid = clp->cl_clientid; |
2326 | stp->st_stid.sc_stateid.si_opaque.so_id = current_stateid++; | |
73997dc4 | 2327 | /* note will be incremented before first return to client: */ |
dcef0413 | 2328 | stp->st_stid.sc_stateid.si_generation = 0; |
36d44c60 | 2329 | hash_stid(&stp->st_stid); |
1da177e4 LT |
2330 | stp->st_access_bmap = 0; |
2331 | stp->st_deny_bmap = 0; | |
84459a11 AA |
2332 | __set_bit(open->op_share_access & ~NFS4_SHARE_WANT_MASK, |
2333 | &stp->st_access_bmap); | |
1da177e4 | 2334 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
4c4cd222 | 2335 | stp->st_openstp = NULL; |
1da177e4 LT |
2336 | } |
2337 | ||
fd39ca9a | 2338 | static void |
fe0750e5 | 2339 | move_to_close_lru(struct nfs4_openowner *oo) |
1da177e4 | 2340 | { |
fe0750e5 | 2341 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 2342 | |
fe0750e5 BF |
2343 | list_move_tail(&oo->oo_close_lru, &close_lru); |
2344 | oo->oo_time = get_seconds(); | |
1da177e4 LT |
2345 | } |
2346 | ||
1da177e4 | 2347 | static int |
599e0a22 BF |
2348 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
2349 | clientid_t *clid) | |
2350 | { | |
2351 | return (sop->so_owner.len == owner->len) && | |
2352 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
2353 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
2354 | } |
2355 | ||
fe0750e5 | 2356 | static struct nfs4_openowner * |
1da177e4 LT |
2357 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) |
2358 | { | |
2359 | struct nfs4_stateowner *so = NULL; | |
2360 | ||
506f275f | 2361 | list_for_each_entry(so, &open_ownerstr_hashtbl[hashval], so_strhash) { |
599e0a22 | 2362 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) |
fe0750e5 | 2363 | return container_of(so, struct nfs4_openowner, oo_owner); |
1da177e4 LT |
2364 | } |
2365 | return NULL; | |
2366 | } | |
2367 | ||
2368 | /* search file_hashtbl[] for file */ | |
2369 | static struct nfs4_file * | |
2370 | find_file(struct inode *ino) | |
2371 | { | |
2372 | unsigned int hashval = file_hashval(ino); | |
2373 | struct nfs4_file *fp; | |
2374 | ||
8b671b80 | 2375 | spin_lock(&recall_lock); |
1da177e4 | 2376 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
13cd2184 N |
2377 | if (fp->fi_inode == ino) { |
2378 | get_nfs4_file(fp); | |
8b671b80 | 2379 | spin_unlock(&recall_lock); |
1da177e4 | 2380 | return fp; |
13cd2184 | 2381 | } |
1da177e4 | 2382 | } |
8b671b80 | 2383 | spin_unlock(&recall_lock); |
1da177e4 LT |
2384 | return NULL; |
2385 | } | |
2386 | ||
d87a8ade | 2387 | static inline int access_valid(u32 x, u32 minorversion) |
ba5a6a19 | 2388 | { |
d87a8ade | 2389 | if ((x & NFS4_SHARE_ACCESS_MASK) < NFS4_SHARE_ACCESS_READ) |
8838dc43 | 2390 | return 0; |
d87a8ade AA |
2391 | if ((x & NFS4_SHARE_ACCESS_MASK) > NFS4_SHARE_ACCESS_BOTH) |
2392 | return 0; | |
2393 | x &= ~NFS4_SHARE_ACCESS_MASK; | |
2394 | if (minorversion && x) { | |
2395 | if ((x & NFS4_SHARE_WANT_MASK) > NFS4_SHARE_WANT_CANCEL) | |
2396 | return 0; | |
2397 | if ((x & NFS4_SHARE_WHEN_MASK) > NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED) | |
2398 | return 0; | |
2399 | x &= ~(NFS4_SHARE_WANT_MASK | NFS4_SHARE_WHEN_MASK); | |
2400 | } | |
2401 | if (x) | |
8838dc43 BF |
2402 | return 0; |
2403 | return 1; | |
ba5a6a19 BF |
2404 | } |
2405 | ||
8838dc43 | 2406 | static inline int deny_valid(u32 x) |
ba5a6a19 | 2407 | { |
8838dc43 BF |
2408 | /* Note: unlike access bits, deny bits may be zero. */ |
2409 | return x <= NFS4_SHARE_DENY_BOTH; | |
ba5a6a19 | 2410 | } |
1da177e4 | 2411 | |
1da177e4 LT |
2412 | /* |
2413 | * Called to check deny when READ with all zero stateid or | |
2414 | * WRITE with all zero or all one stateid | |
2415 | */ | |
b37ad28b | 2416 | static __be32 |
1da177e4 LT |
2417 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
2418 | { | |
2419 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2420 | struct nfs4_file *fp; | |
dcef0413 | 2421 | struct nfs4_ol_stateid *stp; |
b37ad28b | 2422 | __be32 ret; |
1da177e4 LT |
2423 | |
2424 | dprintk("NFSD: nfs4_share_conflict\n"); | |
2425 | ||
2426 | fp = find_file(ino); | |
13cd2184 N |
2427 | if (!fp) |
2428 | return nfs_ok; | |
b700949b | 2429 | ret = nfserr_locked; |
1da177e4 | 2430 | /* Search for conflicting share reservations */ |
13cd2184 N |
2431 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
2432 | if (test_bit(deny_type, &stp->st_deny_bmap) || | |
2433 | test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) | |
2434 | goto out; | |
1da177e4 | 2435 | } |
13cd2184 N |
2436 | ret = nfs_ok; |
2437 | out: | |
2438 | put_nfs4_file(fp); | |
2439 | return ret; | |
1da177e4 LT |
2440 | } |
2441 | ||
6b57d9c8 | 2442 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
1da177e4 | 2443 | { |
1da177e4 LT |
2444 | /* We're assuming the state code never drops its reference |
2445 | * without first removing the lease. Since we're in this lease | |
2446 | * callback (and since the lease code is serialized by the kernel | |
2447 | * lock) we know the server hasn't removed the lease yet, we know | |
2448 | * it's safe to take a reference: */ | |
2449 | atomic_inc(&dp->dl_count); | |
2450 | ||
1da177e4 | 2451 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); |
1da177e4 | 2452 | |
460781b5 | 2453 | /* only place dl_time is set. protected by lock_flocks*/ |
1da177e4 LT |
2454 | dp->dl_time = get_seconds(); |
2455 | ||
6b57d9c8 BF |
2456 | nfsd4_cb_recall(dp); |
2457 | } | |
2458 | ||
acfdf5c3 | 2459 | /* Called from break_lease() with lock_flocks() held. */ |
6b57d9c8 BF |
2460 | static void nfsd_break_deleg_cb(struct file_lock *fl) |
2461 | { | |
acfdf5c3 BF |
2462 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
2463 | struct nfs4_delegation *dp; | |
6b57d9c8 | 2464 | |
acfdf5c3 BF |
2465 | BUG_ON(!fp); |
2466 | /* We assume break_lease is only called once per lease: */ | |
2467 | BUG_ON(fp->fi_had_conflict); | |
0272e1fd BF |
2468 | /* |
2469 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 2470 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 2471 | * in time: |
0272e1fd BF |
2472 | */ |
2473 | fl->fl_break_time = 0; | |
1da177e4 | 2474 | |
5d926e8c | 2475 | spin_lock(&recall_lock); |
acfdf5c3 BF |
2476 | fp->fi_had_conflict = true; |
2477 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
2478 | nfsd_break_one_deleg(dp); | |
5d926e8c | 2479 | spin_unlock(&recall_lock); |
1da177e4 LT |
2480 | } |
2481 | ||
1da177e4 LT |
2482 | static |
2483 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
2484 | { | |
2485 | if (arg & F_UNLCK) | |
2486 | return lease_modify(onlist, arg); | |
2487 | else | |
2488 | return -EAGAIN; | |
2489 | } | |
2490 | ||
7b021967 | 2491 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
2492 | .lm_break = nfsd_break_deleg_cb, |
2493 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
2494 | }; |
2495 | ||
7a8711c9 BF |
2496 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
2497 | { | |
2498 | if (nfsd4_has_session(cstate)) | |
2499 | return nfs_ok; | |
2500 | if (seqid == so->so_seqid - 1) | |
2501 | return nfserr_replay_me; | |
2502 | if (seqid == so->so_seqid) | |
2503 | return nfs_ok; | |
2504 | return nfserr_bad_seqid; | |
2505 | } | |
1da177e4 | 2506 | |
b37ad28b | 2507 | __be32 |
6668958f AA |
2508 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
2509 | struct nfsd4_open *open) | |
1da177e4 | 2510 | { |
1da177e4 LT |
2511 | clientid_t *clientid = &open->op_clientid; |
2512 | struct nfs4_client *clp = NULL; | |
2513 | unsigned int strhashval; | |
fe0750e5 | 2514 | struct nfs4_openowner *oo = NULL; |
7a8711c9 | 2515 | __be32 status; |
1da177e4 | 2516 | |
1da177e4 | 2517 | if (!check_name(open->op_owner)) |
0f442aa2 | 2518 | return nfserr_inval; |
1da177e4 LT |
2519 | |
2520 | if (STALE_CLIENTID(&open->op_clientid)) | |
2521 | return nfserr_stale_clientid; | |
2522 | ||
506f275f | 2523 | strhashval = open_ownerstr_hashval(clientid->cl_id, &open->op_owner); |
fe0750e5 BF |
2524 | oo = find_openstateowner_str(strhashval, open); |
2525 | open->op_openowner = oo; | |
2526 | if (!oo) { | |
0f442aa2 | 2527 | /* Make sure the client's lease hasn't expired. */ |
1da177e4 LT |
2528 | clp = find_confirmed_client(clientid); |
2529 | if (clp == NULL) | |
0f442aa2 BF |
2530 | return nfserr_expired; |
2531 | goto renew; | |
1da177e4 | 2532 | } |
dad1c067 | 2533 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
0f442aa2 | 2534 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
2535 | clp = oo->oo_owner.so_client; |
2536 | release_openowner(oo); | |
2537 | open->op_openowner = NULL; | |
0f442aa2 BF |
2538 | goto renew; |
2539 | } | |
fe0750e5 | 2540 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
7a8711c9 BF |
2541 | if (status) |
2542 | return status; | |
1da177e4 | 2543 | renew: |
fe0750e5 BF |
2544 | if (open->op_openowner == NULL) { |
2545 | oo = alloc_init_open_stateowner(strhashval, clp, open); | |
2546 | if (oo == NULL) | |
3e772463 | 2547 | return nfserr_jukebox; |
fe0750e5 | 2548 | open->op_openowner = oo; |
0f442aa2 | 2549 | } |
fe0750e5 BF |
2550 | list_del_init(&oo->oo_close_lru); |
2551 | renew_client(oo->oo_owner.so_client); | |
0f442aa2 | 2552 | return nfs_ok; |
1da177e4 LT |
2553 | } |
2554 | ||
b37ad28b | 2555 | static inline __be32 |
4a6e43e6 N |
2556 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
2557 | { | |
2558 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
2559 | return nfserr_openmode; | |
2560 | else | |
2561 | return nfs_ok; | |
2562 | } | |
2563 | ||
f459e453 | 2564 | static int share_access_to_flags(u32 share_access) |
52f4fb43 | 2565 | { |
f459e453 | 2566 | share_access &= ~NFS4_SHARE_WANT_MASK; |
52f4fb43 | 2567 | |
f459e453 | 2568 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
52f4fb43 N |
2569 | } |
2570 | ||
f459e453 | 2571 | static struct nfs4_delegation *find_deleg_stateid(stateid_t *s) |
24a0111e | 2572 | { |
f459e453 | 2573 | struct nfs4_stid *ret; |
24a0111e | 2574 | |
f459e453 BF |
2575 | ret = find_stateid_by_type(s, NFS4_DELEG_STID); |
2576 | if (!ret) | |
2577 | return NULL; | |
2578 | return delegstateid(ret); | |
24a0111e BF |
2579 | } |
2580 | ||
b37ad28b | 2581 | static __be32 |
567d9829 N |
2582 | nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, |
2583 | struct nfs4_delegation **dp) | |
2584 | { | |
2585 | int flags; | |
b37ad28b | 2586 | __be32 status = nfserr_bad_stateid; |
567d9829 | 2587 | |
f459e453 | 2588 | *dp = find_deleg_stateid(&open->op_delegate_stateid); |
567d9829 | 2589 | if (*dp == NULL) |
c44c5eeb | 2590 | goto out; |
24a0111e | 2591 | flags = share_access_to_flags(open->op_share_access); |
567d9829 N |
2592 | status = nfs4_check_delegmode(*dp, flags); |
2593 | if (status) | |
2594 | *dp = NULL; | |
c44c5eeb N |
2595 | out: |
2596 | if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2597 | return nfs_ok; | |
2598 | if (status) | |
2599 | return status; | |
dad1c067 | 2600 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
c44c5eeb | 2601 | return nfs_ok; |
567d9829 N |
2602 | } |
2603 | ||
b37ad28b | 2604 | static __be32 |
dcef0413 | 2605 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp) |
1da177e4 | 2606 | { |
dcef0413 | 2607 | struct nfs4_ol_stateid *local; |
fe0750e5 | 2608 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 2609 | |
8beefa24 | 2610 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
2611 | /* ignore lock owners */ |
2612 | if (local->st_stateowner->so_is_open_owner == 0) | |
2613 | continue; | |
2614 | /* remember if we have seen this open owner */ | |
fe0750e5 | 2615 | if (local->st_stateowner == &oo->oo_owner) |
1da177e4 LT |
2616 | *stpp = local; |
2617 | /* check for conflicting share reservations */ | |
2618 | if (!test_share(local, open)) | |
77eaae8d | 2619 | return nfserr_share_denied; |
1da177e4 | 2620 | } |
77eaae8d | 2621 | return nfs_ok; |
1da177e4 LT |
2622 | } |
2623 | ||
dcef0413 | 2624 | static inline struct nfs4_ol_stateid * |
5ac049ac N |
2625 | nfs4_alloc_stateid(void) |
2626 | { | |
2627 | return kmem_cache_alloc(stateid_slab, GFP_KERNEL); | |
2628 | } | |
2629 | ||
21fb4016 BF |
2630 | static inline int nfs4_access_to_access(u32 nfs4_access) |
2631 | { | |
2632 | int flags = 0; | |
2633 | ||
2634 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
2635 | flags |= NFSD_MAY_READ; | |
2636 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
2637 | flags |= NFSD_MAY_WRITE; | |
2638 | return flags; | |
2639 | } | |
2640 | ||
0c12eaff CB |
2641 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
2642 | struct svc_fh *cur_fh, struct nfsd4_open *open) | |
f9d7562f BF |
2643 | { |
2644 | __be32 status; | |
0c12eaff CB |
2645 | int oflag = nfs4_access_to_omode(open->op_share_access); |
2646 | int access = nfs4_access_to_access(open->op_share_access); | |
2647 | ||
2648 | /* CLAIM_DELEGATE_CUR is used in response to a broken lease; | |
2649 | * allowing it to break the lease and return EAGAIN leaves the | |
2650 | * client unable to make progress in returning the delegation */ | |
2651 | if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2652 | access |= NFSD_MAY_NOT_BREAK_LEASE; | |
f9d7562f BF |
2653 | |
2654 | if (!fp->fi_fds[oflag]) { | |
2655 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, | |
2656 | &fp->fi_fds[oflag]); | |
f9d7562f BF |
2657 | if (status) |
2658 | return status; | |
2659 | } | |
2660 | nfs4_file_get_access(fp, oflag); | |
2661 | ||
2662 | return nfs_ok; | |
2663 | } | |
2664 | ||
b37ad28b | 2665 | static __be32 |
dcef0413 | 2666 | nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_ol_stateid **stpp, |
f9d7562f BF |
2667 | struct nfs4_file *fp, struct svc_fh *cur_fh, |
2668 | struct nfsd4_open *open) | |
1da177e4 | 2669 | { |
dcef0413 | 2670 | struct nfs4_ol_stateid *stp; |
f9d7562f | 2671 | __be32 status; |
1da177e4 | 2672 | |
5ac049ac | 2673 | stp = nfs4_alloc_stateid(); |
1da177e4 | 2674 | if (stp == NULL) |
3e772463 | 2675 | return nfserr_jukebox; |
1da177e4 | 2676 | |
0c12eaff | 2677 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); |
f9d7562f BF |
2678 | if (status) { |
2679 | kmem_cache_free(stateid_slab, stp); | |
2680 | return status; | |
1da177e4 | 2681 | } |
1da177e4 LT |
2682 | *stpp = stp; |
2683 | return 0; | |
2684 | } | |
2685 | ||
b37ad28b | 2686 | static inline __be32 |
1da177e4 LT |
2687 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
2688 | struct nfsd4_open *open) | |
2689 | { | |
2690 | struct iattr iattr = { | |
2691 | .ia_valid = ATTR_SIZE, | |
2692 | .ia_size = 0, | |
2693 | }; | |
2694 | if (!open->op_truncate) | |
2695 | return 0; | |
2696 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 2697 | return nfserr_inval; |
1da177e4 LT |
2698 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
2699 | } | |
2700 | ||
b37ad28b | 2701 | static __be32 |
dcef0413 | 2702 | 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 | 2703 | { |
7d947842 BF |
2704 | u32 op_share_access = open->op_share_access & ~NFS4_SHARE_WANT_MASK; |
2705 | bool new_access; | |
b37ad28b | 2706 | __be32 status; |
1da177e4 | 2707 | |
7d947842 | 2708 | new_access = !test_bit(op_share_access, &stp->st_access_bmap); |
f9d7562f | 2709 | if (new_access) { |
0c12eaff | 2710 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); |
f9d7562f BF |
2711 | if (status) |
2712 | return status; | |
6c26d08f | 2713 | } |
1da177e4 LT |
2714 | status = nfsd4_truncate(rqstp, cur_fh, open); |
2715 | if (status) { | |
f9d7562f | 2716 | if (new_access) { |
f197c271 | 2717 | int oflag = nfs4_access_to_omode(op_share_access); |
f9d7562f BF |
2718 | nfs4_file_put_access(fp, oflag); |
2719 | } | |
1da177e4 LT |
2720 | return status; |
2721 | } | |
2722 | /* remember the open */ | |
24a0111e | 2723 | __set_bit(op_share_access, &stp->st_access_bmap); |
b55e0ba1 | 2724 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
1da177e4 LT |
2725 | |
2726 | return nfs_ok; | |
2727 | } | |
2728 | ||
2729 | ||
1da177e4 | 2730 | static void |
37515177 | 2731 | nfs4_set_claim_prev(struct nfsd4_open *open) |
1da177e4 | 2732 | { |
dad1c067 | 2733 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
fe0750e5 | 2734 | open->op_openowner->oo_owner.so_client->cl_firststate = 1; |
1da177e4 LT |
2735 | } |
2736 | ||
14a24e99 BF |
2737 | /* Should we give out recallable state?: */ |
2738 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
2739 | { | |
2740 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
2741 | return true; | |
2742 | /* | |
2743 | * In the sessions case, since we don't have to establish a | |
2744 | * separate connection for callbacks, we assume it's OK | |
2745 | * until we hear otherwise: | |
2746 | */ | |
2747 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
2748 | } | |
2749 | ||
22d38c4c BF |
2750 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) |
2751 | { | |
2752 | struct file_lock *fl; | |
2753 | ||
2754 | fl = locks_alloc_lock(); | |
2755 | if (!fl) | |
2756 | return NULL; | |
2757 | locks_init_lock(fl); | |
2758 | fl->fl_lmops = &nfsd_lease_mng_ops; | |
2759 | fl->fl_flags = FL_LEASE; | |
2760 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; | |
2761 | fl->fl_end = OFFSET_MAX; | |
acfdf5c3 | 2762 | fl->fl_owner = (fl_owner_t)(dp->dl_file); |
22d38c4c | 2763 | fl->fl_pid = current->tgid; |
22d38c4c BF |
2764 | return fl; |
2765 | } | |
2766 | ||
edab9782 BF |
2767 | static int nfs4_setlease(struct nfs4_delegation *dp, int flag) |
2768 | { | |
acfdf5c3 | 2769 | struct nfs4_file *fp = dp->dl_file; |
edab9782 BF |
2770 | struct file_lock *fl; |
2771 | int status; | |
2772 | ||
2773 | fl = nfs4_alloc_init_lease(dp, flag); | |
2774 | if (!fl) | |
2775 | return -ENOMEM; | |
acfdf5c3 BF |
2776 | fl->fl_file = find_readable_file(fp); |
2777 | list_add(&dp->dl_perclnt, &dp->dl_client->cl_delegations); | |
2778 | status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); | |
edab9782 | 2779 | if (status) { |
acfdf5c3 | 2780 | list_del_init(&dp->dl_perclnt); |
edab9782 BF |
2781 | locks_free_lock(fl); |
2782 | return -ENOMEM; | |
2783 | } | |
acfdf5c3 BF |
2784 | fp->fi_lease = fl; |
2785 | fp->fi_deleg_file = fl->fl_file; | |
2786 | get_file(fp->fi_deleg_file); | |
2787 | atomic_set(&fp->fi_delegees, 1); | |
2788 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2789 | return 0; | |
2790 | } | |
2791 | ||
2792 | static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag) | |
2793 | { | |
2794 | struct nfs4_file *fp = dp->dl_file; | |
2795 | ||
2796 | if (!fp->fi_lease) | |
2797 | return nfs4_setlease(dp, flag); | |
2798 | spin_lock(&recall_lock); | |
2799 | if (fp->fi_had_conflict) { | |
2800 | spin_unlock(&recall_lock); | |
2801 | return -EAGAIN; | |
2802 | } | |
2803 | atomic_inc(&fp->fi_delegees); | |
2804 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2805 | spin_unlock(&recall_lock); | |
2806 | list_add(&dp->dl_perclnt, &dp->dl_client->cl_delegations); | |
edab9782 BF |
2807 | return 0; |
2808 | } | |
2809 | ||
1da177e4 LT |
2810 | /* |
2811 | * Attempt to hand out a delegation. | |
2812 | */ | |
2813 | static void | |
dcef0413 | 2814 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_ol_stateid *stp) |
1da177e4 LT |
2815 | { |
2816 | struct nfs4_delegation *dp; | |
fe0750e5 | 2817 | struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner); |
14a24e99 | 2818 | int cb_up; |
1da177e4 LT |
2819 | int status, flag = 0; |
2820 | ||
fe0750e5 | 2821 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
1da177e4 | 2822 | flag = NFS4_OPEN_DELEGATE_NONE; |
7b190fec N |
2823 | open->op_recall = 0; |
2824 | switch (open->op_claim_type) { | |
2825 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 2826 | if (!cb_up) |
7b190fec N |
2827 | open->op_recall = 1; |
2828 | flag = open->op_delegate_type; | |
2829 | if (flag == NFS4_OPEN_DELEGATE_NONE) | |
2830 | goto out; | |
2831 | break; | |
2832 | case NFS4_OPEN_CLAIM_NULL: | |
2833 | /* Let's not give out any delegations till everyone's | |
2834 | * had the chance to reclaim theirs.... */ | |
af558e33 | 2835 | if (locks_in_grace()) |
7b190fec | 2836 | goto out; |
dad1c067 | 2837 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
7b190fec N |
2838 | goto out; |
2839 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | |
2840 | flag = NFS4_OPEN_DELEGATE_WRITE; | |
2841 | else | |
2842 | flag = NFS4_OPEN_DELEGATE_READ; | |
2843 | break; | |
2844 | default: | |
2845 | goto out; | |
2846 | } | |
1da177e4 | 2847 | |
fe0750e5 | 2848 | dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh, flag); |
dd239cc0 BF |
2849 | if (dp == NULL) |
2850 | goto out_no_deleg; | |
acfdf5c3 | 2851 | status = nfs4_set_delegation(dp, flag); |
edab9782 | 2852 | if (status) |
dd239cc0 | 2853 | goto out_free; |
1da177e4 | 2854 | |
d5477a8d | 2855 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 2856 | |
8c10cbdb | 2857 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
d5477a8d | 2858 | STATEID_VAL(&dp->dl_stid.sc_stateid)); |
1da177e4 | 2859 | out: |
7b190fec N |
2860 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS |
2861 | && flag == NFS4_OPEN_DELEGATE_NONE | |
2862 | && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) | |
2fdada03 | 2863 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
1da177e4 | 2864 | open->op_delegate_type = flag; |
dd239cc0 BF |
2865 | return; |
2866 | out_free: | |
acfdf5c3 | 2867 | nfs4_put_delegation(dp); |
dd239cc0 BF |
2868 | out_no_deleg: |
2869 | flag = NFS4_OPEN_DELEGATE_NONE; | |
2870 | goto out; | |
1da177e4 LT |
2871 | } |
2872 | ||
2873 | /* | |
2874 | * called with nfs4_lock_state() held. | |
2875 | */ | |
b37ad28b | 2876 | __be32 |
1da177e4 LT |
2877 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
2878 | { | |
6668958f | 2879 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
1da177e4 LT |
2880 | struct nfs4_file *fp = NULL; |
2881 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
dcef0413 | 2882 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 2883 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 2884 | __be32 status; |
1da177e4 LT |
2885 | |
2886 | status = nfserr_inval; | |
d87a8ade | 2887 | if (!access_valid(open->op_share_access, resp->cstate.minorversion) |
ba5a6a19 | 2888 | || !deny_valid(open->op_share_deny)) |
1da177e4 LT |
2889 | goto out; |
2890 | /* | |
2891 | * Lookup file; if found, lookup stateid and check open request, | |
2892 | * and check for delegations in the process of being recalled. | |
2893 | * If not found, create the nfs4_file struct | |
2894 | */ | |
2895 | fp = find_file(ino); | |
2896 | if (fp) { | |
2897 | if ((status = nfs4_check_open(fp, open, &stp))) | |
2898 | goto out; | |
c44c5eeb N |
2899 | status = nfs4_check_deleg(fp, open, &dp); |
2900 | if (status) | |
2901 | goto out; | |
1da177e4 | 2902 | } else { |
c44c5eeb N |
2903 | status = nfserr_bad_stateid; |
2904 | if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2905 | goto out; | |
3e772463 | 2906 | status = nfserr_jukebox; |
1da177e4 LT |
2907 | fp = alloc_init_file(ino); |
2908 | if (fp == NULL) | |
2909 | goto out; | |
2910 | } | |
2911 | ||
2912 | /* | |
2913 | * OPEN the file, or upgrade an existing OPEN. | |
2914 | * If truncate fails, the OPEN fails. | |
2915 | */ | |
2916 | if (stp) { | |
2917 | /* Stateid was found, this is an OPEN upgrade */ | |
f9d7562f | 2918 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
1da177e4 LT |
2919 | if (status) |
2920 | goto out; | |
2921 | } else { | |
f9d7562f | 2922 | status = nfs4_new_open(rqstp, &stp, fp, current_fh, open); |
567d9829 | 2923 | if (status) |
1da177e4 | 2924 | goto out; |
881ea2b1 | 2925 | init_open_stateid(stp, fp, open); |
1da177e4 LT |
2926 | status = nfsd4_truncate(rqstp, current_fh, open); |
2927 | if (status) { | |
2283963f | 2928 | release_open_stateid(stp); |
1da177e4 LT |
2929 | goto out; |
2930 | } | |
2931 | } | |
dcef0413 BF |
2932 | update_stateid(&stp->st_stid.sc_stateid); |
2933 | memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 2934 | |
4dc6ec00 | 2935 | if (nfsd4_has_session(&resp->cstate)) |
dad1c067 | 2936 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
6668958f | 2937 | |
1da177e4 LT |
2938 | /* |
2939 | * Attempt to hand out a delegation. No error return, because the | |
2940 | * OPEN succeeds even if we fail. | |
2941 | */ | |
2942 | nfs4_open_delegation(current_fh, open, stp); | |
2943 | ||
2944 | status = nfs_ok; | |
2945 | ||
8c10cbdb | 2946 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
dcef0413 | 2947 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
1da177e4 | 2948 | out: |
13cd2184 N |
2949 | if (fp) |
2950 | put_nfs4_file(fp); | |
37515177 N |
2951 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
2952 | nfs4_set_claim_prev(open); | |
1da177e4 LT |
2953 | /* |
2954 | * To finish the open response, we just need to set the rflags. | |
2955 | */ | |
2956 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
dad1c067 | 2957 | if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && |
6668958f | 2958 | !nfsd4_has_session(&resp->cstate)) |
1da177e4 LT |
2959 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
2960 | ||
2961 | return status; | |
2962 | } | |
2963 | ||
b37ad28b | 2964 | __be32 |
b591480b BF |
2965 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2966 | clientid_t *clid) | |
1da177e4 LT |
2967 | { |
2968 | struct nfs4_client *clp; | |
b37ad28b | 2969 | __be32 status; |
1da177e4 LT |
2970 | |
2971 | nfs4_lock_state(); | |
2972 | dprintk("process_renew(%08x/%08x): starting\n", | |
2973 | clid->cl_boot, clid->cl_id); | |
2974 | status = nfserr_stale_clientid; | |
2975 | if (STALE_CLIENTID(clid)) | |
2976 | goto out; | |
2977 | clp = find_confirmed_client(clid); | |
2978 | status = nfserr_expired; | |
2979 | if (clp == NULL) { | |
2980 | /* We assume the client took too long to RENEW. */ | |
2981 | dprintk("nfsd4_renew: clientid not found!\n"); | |
2982 | goto out; | |
2983 | } | |
2984 | renew_client(clp); | |
2985 | status = nfserr_cb_path_down; | |
ea1da636 | 2986 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 2987 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
2988 | goto out; |
2989 | status = nfs_ok; | |
2990 | out: | |
2991 | nfs4_unlock_state(); | |
2992 | return status; | |
2993 | } | |
2994 | ||
c47d832b | 2995 | static struct lock_manager nfsd4_manager = { |
af558e33 BF |
2996 | }; |
2997 | ||
a76b4319 | 2998 | static void |
af558e33 | 2999 | nfsd4_end_grace(void) |
a76b4319 N |
3000 | { |
3001 | dprintk("NFSD: end of grace period\n"); | |
c7b9a459 | 3002 | nfsd4_recdir_purge_old(); |
af558e33 | 3003 | locks_end_grace(&nfsd4_manager); |
e46b498c BF |
3004 | /* |
3005 | * Now that every NFSv4 client has had the chance to recover and | |
3006 | * to see the (possibly new, possibly shorter) lease time, we | |
3007 | * can safely set the next grace time to the current lease time: | |
3008 | */ | |
3009 | nfsd4_grace = nfsd4_lease; | |
a76b4319 N |
3010 | } |
3011 | ||
fd39ca9a | 3012 | static time_t |
1da177e4 LT |
3013 | nfs4_laundromat(void) |
3014 | { | |
3015 | struct nfs4_client *clp; | |
fe0750e5 | 3016 | struct nfs4_openowner *oo; |
1da177e4 LT |
3017 | struct nfs4_delegation *dp; |
3018 | struct list_head *pos, *next, reaplist; | |
cf07d2ea BF |
3019 | time_t cutoff = get_seconds() - nfsd4_lease; |
3020 | time_t t, clientid_val = nfsd4_lease; | |
3021 | time_t u, test_val = nfsd4_lease; | |
1da177e4 LT |
3022 | |
3023 | nfs4_lock_state(); | |
3024 | ||
3025 | dprintk("NFSD: laundromat service - starting\n"); | |
af558e33 BF |
3026 | if (locks_in_grace()) |
3027 | nfsd4_end_grace(); | |
36acb66b BH |
3028 | INIT_LIST_HEAD(&reaplist); |
3029 | spin_lock(&client_lock); | |
1da177e4 LT |
3030 | list_for_each_safe(pos, next, &client_lru) { |
3031 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
3032 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
3033 | t = clp->cl_time - cutoff; | |
3034 | if (clientid_val > t) | |
3035 | clientid_val = t; | |
3036 | break; | |
3037 | } | |
d7682988 BH |
3038 | if (atomic_read(&clp->cl_refcount)) { |
3039 | dprintk("NFSD: client in use (clientid %08x)\n", | |
3040 | clp->cl_clientid.cl_id); | |
3041 | continue; | |
3042 | } | |
3043 | unhash_client_locked(clp); | |
3044 | list_add(&clp->cl_lru, &reaplist); | |
36acb66b BH |
3045 | } |
3046 | spin_unlock(&client_lock); | |
3047 | list_for_each_safe(pos, next, &reaplist) { | |
3048 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
3049 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
3050 | clp->cl_clientid.cl_id); | |
c7b9a459 | 3051 | nfsd4_remove_clid_dir(clp); |
1da177e4 LT |
3052 | expire_client(clp); |
3053 | } | |
1da177e4 LT |
3054 | spin_lock(&recall_lock); |
3055 | list_for_each_safe(pos, next, &del_recall_lru) { | |
3056 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3057 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
3058 | u = dp->dl_time - cutoff; | |
3059 | if (test_val > u) | |
3060 | test_val = u; | |
3061 | break; | |
3062 | } | |
1da177e4 LT |
3063 | list_move(&dp->dl_recall_lru, &reaplist); |
3064 | } | |
3065 | spin_unlock(&recall_lock); | |
3066 | list_for_each_safe(pos, next, &reaplist) { | |
3067 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3068 | list_del_init(&dp->dl_recall_lru); | |
3069 | unhash_delegation(dp); | |
3070 | } | |
cf07d2ea | 3071 | test_val = nfsd4_lease; |
1da177e4 | 3072 | list_for_each_safe(pos, next, &close_lru) { |
fe0750e5 BF |
3073 | oo = container_of(pos, struct nfs4_openowner, oo_close_lru); |
3074 | if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { | |
3075 | u = oo->oo_time - cutoff; | |
1da177e4 LT |
3076 | if (test_val > u) |
3077 | test_val = u; | |
3078 | break; | |
3079 | } | |
fe0750e5 | 3080 | release_openowner(oo); |
1da177e4 LT |
3081 | } |
3082 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
3083 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
3084 | nfs4_unlock_state(); | |
3085 | return clientid_val; | |
3086 | } | |
3087 | ||
a254b246 HH |
3088 | static struct workqueue_struct *laundry_wq; |
3089 | static void laundromat_main(struct work_struct *); | |
3090 | static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); | |
3091 | ||
3092 | static void | |
c4028958 | 3093 | laundromat_main(struct work_struct *not_used) |
1da177e4 LT |
3094 | { |
3095 | time_t t; | |
3096 | ||
3097 | t = nfs4_laundromat(); | |
3098 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); | |
58da282b | 3099 | queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); |
1da177e4 LT |
3100 | } |
3101 | ||
38c387b5 | 3102 | static struct nfs4_openowner * search_close_lru(stateid_t *s) |
f8816512 | 3103 | { |
fe0750e5 | 3104 | struct nfs4_openowner *local; |
38c387b5 | 3105 | struct nfs4_ol_stateid *os; |
1da177e4 | 3106 | |
fe0750e5 | 3107 | list_for_each_entry(local, &close_lru, oo_close_lru) { |
38c387b5 BF |
3108 | os = local->oo_last_closed_stid; |
3109 | if (same_stateid(&os->st_stid.sc_stateid, s)) | |
f4dee24c | 3110 | return local; |
1da177e4 LT |
3111 | } |
3112 | return NULL; | |
3113 | } | |
3114 | ||
3115 | static inline int | |
dcef0413 | 3116 | nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) |
1da177e4 | 3117 | { |
f9d7562f | 3118 | return fhp->fh_dentry->d_inode != stp->st_file->fi_inode; |
1da177e4 LT |
3119 | } |
3120 | ||
3121 | static int | |
3122 | STALE_STATEID(stateid_t *stateid) | |
3123 | { | |
d3b313a4 | 3124 | if (stateid->si_opaque.so_clid.cl_boot == boot_time) |
e4e83ea4 BF |
3125 | return 0; |
3126 | dprintk("NFSD: stale stateid " STATEID_FMT "!\n", | |
8c10cbdb | 3127 | STATEID_VAL(stateid)); |
e4e83ea4 | 3128 | return 1; |
1da177e4 LT |
3129 | } |
3130 | ||
3131 | static inline int | |
3132 | access_permit_read(unsigned long access_bmap) | |
3133 | { | |
3134 | return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || | |
3135 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || | |
3136 | test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); | |
3137 | } | |
3138 | ||
3139 | static inline int | |
3140 | access_permit_write(unsigned long access_bmap) | |
3141 | { | |
3142 | return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || | |
3143 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); | |
3144 | } | |
3145 | ||
3146 | static | |
dcef0413 | 3147 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
1da177e4 | 3148 | { |
b37ad28b | 3149 | __be32 status = nfserr_openmode; |
1da177e4 | 3150 | |
02921914 BF |
3151 | /* For lock stateid's, we test the parent open, not the lock: */ |
3152 | if (stp->st_openstp) | |
3153 | stp = stp->st_openstp; | |
1da177e4 LT |
3154 | if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) |
3155 | goto out; | |
3156 | if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) | |
3157 | goto out; | |
3158 | status = nfs_ok; | |
3159 | out: | |
3160 | return status; | |
3161 | } | |
3162 | ||
b37ad28b | 3163 | static inline __be32 |
1da177e4 LT |
3164 | check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) |
3165 | { | |
203a8c8e | 3166 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 3167 | return nfs_ok; |
af558e33 | 3168 | else if (locks_in_grace()) { |
25985edc | 3169 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
3170 | * conflicting state; so we must wait out the grace period. */ |
3171 | return nfserr_grace; | |
3172 | } else if (flags & WR_STATE) | |
3173 | return nfs4_share_conflict(current_fh, | |
3174 | NFS4_SHARE_DENY_WRITE); | |
3175 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
3176 | return nfs4_share_conflict(current_fh, | |
3177 | NFS4_SHARE_DENY_READ); | |
3178 | } | |
3179 | ||
3180 | /* | |
3181 | * Allow READ/WRITE during grace period on recovered state only for files | |
3182 | * that are not able to provide mandatory locking. | |
3183 | */ | |
3184 | static inline int | |
18f82731 | 3185 | grace_disallows_io(struct inode *inode) |
1da177e4 | 3186 | { |
203a8c8e | 3187 | return locks_in_grace() && mandatory_lock(inode); |
1da177e4 LT |
3188 | } |
3189 | ||
81b82965 BF |
3190 | /* Returns true iff a is later than b: */ |
3191 | static bool stateid_generation_after(stateid_t *a, stateid_t *b) | |
3192 | { | |
3193 | return (s32)a->si_generation - (s32)b->si_generation > 0; | |
3194 | } | |
3195 | ||
28dde241 | 3196 | static int check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 3197 | { |
6668958f AA |
3198 | /* |
3199 | * When sessions are used the stateid generation number is ignored | |
3200 | * when it is zero. | |
3201 | */ | |
28dde241 | 3202 | if (has_session && in->si_generation == 0) |
81b82965 BF |
3203 | return nfs_ok; |
3204 | ||
3205 | if (in->si_generation == ref->si_generation) | |
3206 | return nfs_ok; | |
6668958f | 3207 | |
0836f587 | 3208 | /* If the client sends us a stateid from the future, it's buggy: */ |
81b82965 | 3209 | if (stateid_generation_after(in, ref)) |
0836f587 BF |
3210 | return nfserr_bad_stateid; |
3211 | /* | |
81b82965 BF |
3212 | * However, we could see a stateid from the past, even from a |
3213 | * non-buggy client. For example, if the client sends a lock | |
3214 | * while some IO is outstanding, the lock may bump si_generation | |
3215 | * while the IO is still in flight. The client could avoid that | |
3216 | * situation by waiting for responses on all the IO requests, | |
3217 | * but better performance may result in retrying IO that | |
3218 | * receives an old_stateid error if requests are rarely | |
3219 | * reordered in flight: | |
0836f587 | 3220 | */ |
81b82965 | 3221 | return nfserr_old_stateid; |
0836f587 BF |
3222 | } |
3223 | ||
28dde241 | 3224 | __be32 nfs4_validate_stateid(stateid_t *stateid, bool has_session) |
17456804 | 3225 | { |
97b7e3b6 BF |
3226 | struct nfs4_stid *s; |
3227 | struct nfs4_ol_stateid *ols; | |
3228 | __be32 status; | |
17456804 BS |
3229 | |
3230 | if (STALE_STATEID(stateid)) | |
97b7e3b6 | 3231 | return nfserr_stale_stateid; |
17456804 | 3232 | |
97b7e3b6 BF |
3233 | s = find_stateid(stateid); |
3234 | if (!s) | |
3235 | return nfserr_stale_stateid; | |
3236 | status = check_stateid_generation(stateid, &s->sc_stateid, has_session); | |
17456804 | 3237 | if (status) |
97b7e3b6 BF |
3238 | return status; |
3239 | if (!(s->sc_type & (NFS4_OPEN_STID | NFS4_LOCK_STID))) | |
3240 | return nfs_ok; | |
3241 | ols = openlockstateid(s); | |
3242 | if (ols->st_stateowner->so_is_open_owner | |
dad1c067 | 3243 | && !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
97b7e3b6 BF |
3244 | return nfserr_bad_stateid; |
3245 | return nfs_ok; | |
17456804 BS |
3246 | } |
3247 | ||
1da177e4 LT |
3248 | /* |
3249 | * Checks for stateid operations | |
3250 | */ | |
b37ad28b | 3251 | __be32 |
dd453dfd BH |
3252 | nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, |
3253 | stateid_t *stateid, int flags, struct file **filpp) | |
1da177e4 | 3254 | { |
69064a27 | 3255 | struct nfs4_stid *s; |
dcef0413 | 3256 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 3257 | struct nfs4_delegation *dp = NULL; |
dd453dfd | 3258 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 3259 | struct inode *ino = current_fh->fh_dentry->d_inode; |
b37ad28b | 3260 | __be32 status; |
1da177e4 | 3261 | |
1da177e4 LT |
3262 | if (filpp) |
3263 | *filpp = NULL; | |
3264 | ||
18f82731 | 3265 | if (grace_disallows_io(ino)) |
1da177e4 LT |
3266 | return nfserr_grace; |
3267 | ||
3268 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3269 | return check_special_stateids(current_fh, stateid, flags); | |
3270 | ||
1da177e4 LT |
3271 | status = nfserr_stale_stateid; |
3272 | if (STALE_STATEID(stateid)) | |
3273 | goto out; | |
3274 | ||
33515142 BF |
3275 | /* |
3276 | * We assume that any stateid that has the current boot time, | |
3277 | * but that we can't find, is expired: | |
3278 | */ | |
3279 | status = nfserr_expired; | |
69064a27 BF |
3280 | s = find_stateid(stateid); |
3281 | if (!s) | |
3282 | goto out; | |
3283 | status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); | |
3284 | if (status) | |
3285 | goto out; | |
3286 | if (s->sc_type == NFS4_DELEG_STID) { | |
3287 | dp = delegstateid(s); | |
dc9bf700 BF |
3288 | status = nfs4_check_delegmode(dp, flags); |
3289 | if (status) | |
3290 | goto out; | |
3291 | renew_client(dp->dl_client); | |
43b0178e | 3292 | if (filpp) { |
acfdf5c3 | 3293 | *filpp = dp->dl_file->fi_deleg_file; |
43b0178e DC |
3294 | BUG_ON(!*filpp); |
3295 | } | |
1da177e4 | 3296 | } else { /* open or lock stateid */ |
69064a27 | 3297 | stp = openlockstateid(s); |
33515142 | 3298 | status = nfserr_bad_stateid; |
6150ef0d | 3299 | if (nfs4_check_fh(current_fh, stp)) |
1da177e4 | 3300 | goto out; |
fe0750e5 | 3301 | if (stp->st_stateowner->so_is_open_owner |
dad1c067 | 3302 | && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
1da177e4 | 3303 | goto out; |
a4455be0 BF |
3304 | status = nfs4_check_openmode(stp, flags); |
3305 | if (status) | |
1da177e4 LT |
3306 | goto out; |
3307 | renew_client(stp->st_stateowner->so_client); | |
f9d7562f BF |
3308 | if (filpp) { |
3309 | if (flags & RD_STATE) | |
3310 | *filpp = find_readable_file(stp->st_file); | |
3311 | else | |
3312 | *filpp = find_writeable_file(stp->st_file); | |
f9d7562f | 3313 | } |
1da177e4 LT |
3314 | } |
3315 | status = nfs_ok; | |
3316 | out: | |
3317 | return status; | |
3318 | } | |
3319 | ||
e1ca12df | 3320 | static __be32 |
dcef0413 | 3321 | nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) |
e1ca12df | 3322 | { |
fe0750e5 | 3323 | if (check_for_locks(stp->st_file, lockowner(stp->st_stateowner))) |
e1ca12df BS |
3324 | return nfserr_locks_held; |
3325 | release_lock_stateid(stp); | |
3326 | return nfs_ok; | |
3327 | } | |
3328 | ||
17456804 BS |
3329 | /* |
3330 | * Test if the stateid is valid | |
3331 | */ | |
3332 | __be32 | |
3333 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3334 | struct nfsd4_test_stateid *test_stateid) | |
3335 | { | |
3336 | test_stateid->ts_has_session = nfsd4_has_session(cstate); | |
3337 | return nfs_ok; | |
3338 | } | |
3339 | ||
e1ca12df BS |
3340 | __be32 |
3341 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3342 | struct nfsd4_free_stateid *free_stateid) | |
3343 | { | |
3344 | stateid_t *stateid = &free_stateid->fr_stateid; | |
2da1cec7 BF |
3345 | struct nfs4_stid *s; |
3346 | __be32 ret = nfserr_bad_stateid; | |
e1ca12df BS |
3347 | |
3348 | nfs4_lock_state(); | |
2da1cec7 BF |
3349 | s = find_stateid(stateid); |
3350 | if (!s) | |
81b82965 | 3351 | goto out; |
2da1cec7 BF |
3352 | switch (s->sc_type) { |
3353 | case NFS4_DELEG_STID: | |
e1ca12df BS |
3354 | ret = nfserr_locks_held; |
3355 | goto out; | |
2da1cec7 BF |
3356 | case NFS4_OPEN_STID: |
3357 | case NFS4_LOCK_STID: | |
3358 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); | |
3359 | if (ret) | |
3360 | goto out; | |
3361 | if (s->sc_type == NFS4_LOCK_STID) | |
3362 | ret = nfsd4_free_lock_stateid(openlockstateid(s)); | |
3363 | else | |
3364 | ret = nfserr_locks_held; | |
e1ca12df | 3365 | } |
e1ca12df BS |
3366 | out: |
3367 | nfs4_unlock_state(); | |
3368 | return ret; | |
3369 | } | |
3370 | ||
4c4cd222 N |
3371 | static inline int |
3372 | setlkflg (int type) | |
3373 | { | |
3374 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
3375 | RD_STATE : WR_STATE; | |
3376 | } | |
1da177e4 | 3377 | |
c0a5d93e BF |
3378 | static __be32 nfs4_nospecial_stateid_checks(stateid_t *stateid) |
3379 | { | |
3380 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3381 | return nfserr_bad_stateid; | |
3382 | if (STALE_STATEID(stateid)) | |
3383 | return nfserr_stale_stateid; | |
3384 | return nfs_ok; | |
3385 | } | |
3386 | ||
dcef0413 | 3387 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
c0a5d93e BF |
3388 | { |
3389 | struct svc_fh *current_fh = &cstate->current_fh; | |
3390 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
3391 | __be32 status; | |
3392 | ||
3393 | if (nfs4_check_fh(current_fh, stp)) | |
3394 | return nfserr_bad_stateid; | |
3395 | status = nfsd4_check_seqid(cstate, sop, seqid); | |
3396 | if (status) | |
3397 | return status; | |
dcef0413 | 3398 | return check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); |
c0a5d93e BF |
3399 | } |
3400 | ||
1da177e4 LT |
3401 | /* |
3402 | * Checks for sequence id mutating operations. | |
3403 | */ | |
b37ad28b | 3404 | static __be32 |
dd453dfd | 3405 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2288d0e3 | 3406 | stateid_t *stateid, char typemask, |
dcef0413 | 3407 | struct nfs4_ol_stateid **stpp) |
1da177e4 | 3408 | { |
0836f587 | 3409 | __be32 status; |
1da177e4 | 3410 | |
8c10cbdb BH |
3411 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
3412 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 3413 | |
1da177e4 | 3414 | *stpp = NULL; |
c0a5d93e BF |
3415 | status = nfs4_nospecial_stateid_checks(stateid); |
3416 | if (status) | |
3417 | return status; | |
f459e453 | 3418 | *stpp = find_ol_stateid_by_type(stateid, typemask); |
f4dee24c BF |
3419 | if (*stpp == NULL) |
3420 | return nfserr_expired; | |
c0a5d93e BF |
3421 | cstate->replay_owner = (*stpp)->st_stateowner; |
3422 | renew_client((*stpp)->st_stateowner->so_client); | |
1da177e4 | 3423 | |
c0a5d93e BF |
3424 | return nfs4_seqid_op_checks(cstate, stateid, seqid, *stpp); |
3425 | } | |
39325bd0 | 3426 | |
dcef0413 | 3427 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, stateid_t *stateid, struct nfs4_ol_stateid **stpp) |
c0a5d93e BF |
3428 | { |
3429 | __be32 status; | |
3430 | struct nfs4_openowner *oo; | |
1da177e4 | 3431 | |
c0a5d93e | 3432 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
2288d0e3 | 3433 | NFS4_OPEN_STID, stpp); |
7a8711c9 BF |
3434 | if (status) |
3435 | return status; | |
c0a5d93e | 3436 | oo = openowner((*stpp)->st_stateowner); |
dad1c067 | 3437 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) |
3a4f98bb | 3438 | return nfserr_bad_stateid; |
3a4f98bb | 3439 | return nfs_ok; |
1da177e4 LT |
3440 | } |
3441 | ||
b37ad28b | 3442 | __be32 |
ca364317 | 3443 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3444 | struct nfsd4_open_confirm *oc) |
1da177e4 | 3445 | { |
b37ad28b | 3446 | __be32 status; |
fe0750e5 | 3447 | struct nfs4_openowner *oo; |
dcef0413 | 3448 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
3449 | |
3450 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | |
ca364317 BF |
3451 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3452 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3453 | |
ca364317 | 3454 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
3455 | if (status) |
3456 | return status; | |
1da177e4 LT |
3457 | |
3458 | nfs4_lock_state(); | |
3459 | ||
9072d5c6 | 3460 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3461 | oc->oc_seqid, &oc->oc_req_stateid, |
2288d0e3 | 3462 | NFS4_OPEN_STID, &stp); |
9072d5c6 | 3463 | if (status) |
68b66e82 | 3464 | goto out; |
fe0750e5 | 3465 | oo = openowner(stp->st_stateowner); |
68b66e82 | 3466 | status = nfserr_bad_stateid; |
dad1c067 | 3467 | if (oo->oo_flags & NFS4_OO_CONFIRMED) |
68b66e82 | 3468 | goto out; |
dad1c067 | 3469 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
dcef0413 BF |
3470 | update_stateid(&stp->st_stid.sc_stateid); |
3471 | memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
8c10cbdb | 3472 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
dcef0413 | 3473 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); |
c7b9a459 | 3474 | |
fe0750e5 | 3475 | nfsd4_create_clid_dir(oo->oo_owner.so_client); |
68b66e82 | 3476 | status = nfs_ok; |
1da177e4 | 3477 | out: |
5ec094c1 BF |
3478 | if (!cstate->replay_owner) |
3479 | nfs4_unlock_state(); | |
1da177e4 LT |
3480 | return status; |
3481 | } | |
3482 | ||
dcef0413 | 3483 | static inline void nfs4_file_downgrade(struct nfs4_ol_stateid *stp, unsigned int to_access) |
1da177e4 LT |
3484 | { |
3485 | int i; | |
f197c271 | 3486 | |
1da177e4 | 3487 | for (i = 1; i < 4; i++) { |
f197c271 BF |
3488 | if (test_bit(i, &stp->st_access_bmap) && !(i & to_access)) { |
3489 | nfs4_file_put_access(stp->st_file, i); | |
3490 | __clear_bit(i, &stp->st_access_bmap); | |
3491 | } | |
1da177e4 LT |
3492 | } |
3493 | } | |
3494 | ||
3495 | static void | |
3496 | reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) | |
3497 | { | |
3498 | int i; | |
3499 | for (i = 0; i < 4; i++) { | |
3500 | if ((i & deny) != i) | |
3501 | __clear_bit(i, bmap); | |
3502 | } | |
3503 | } | |
3504 | ||
b37ad28b | 3505 | __be32 |
ca364317 BF |
3506 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
3507 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 3508 | struct nfsd4_open_downgrade *od) |
1da177e4 | 3509 | { |
b37ad28b | 3510 | __be32 status; |
dcef0413 | 3511 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
3512 | |
3513 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | |
ca364317 BF |
3514 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3515 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3516 | |
d87a8ade | 3517 | if (!access_valid(od->od_share_access, cstate->minorversion) |
ba5a6a19 | 3518 | || !deny_valid(od->od_share_deny)) |
1da177e4 LT |
3519 | return nfserr_inval; |
3520 | ||
3521 | nfs4_lock_state(); | |
c0a5d93e BF |
3522 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
3523 | &od->od_stateid, &stp); | |
9072d5c6 | 3524 | if (status) |
1da177e4 | 3525 | goto out; |
1da177e4 LT |
3526 | status = nfserr_inval; |
3527 | if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { | |
3528 | dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
3529 | stp->st_access_bmap, od->od_share_access); | |
3530 | goto out; | |
3531 | } | |
3532 | if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { | |
3533 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", | |
3534 | stp->st_deny_bmap, od->od_share_deny); | |
3535 | goto out; | |
3536 | } | |
f197c271 | 3537 | nfs4_file_downgrade(stp, od->od_share_access); |
1da177e4 | 3538 | |
1da177e4 LT |
3539 | reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); |
3540 | ||
dcef0413 BF |
3541 | update_stateid(&stp->st_stid.sc_stateid); |
3542 | memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
3543 | status = nfs_ok; |
3544 | out: | |
5ec094c1 BF |
3545 | if (!cstate->replay_owner) |
3546 | nfs4_unlock_state(); | |
1da177e4 LT |
3547 | return status; |
3548 | } | |
3549 | ||
38c387b5 BF |
3550 | void nfsd4_purge_closed_stateid(struct nfs4_stateowner *so) |
3551 | { | |
3552 | struct nfs4_openowner *oo; | |
3553 | struct nfs4_ol_stateid *s; | |
3554 | ||
3555 | if (!so->so_is_open_owner) | |
3556 | return; | |
3557 | oo = openowner(so); | |
3558 | s = oo->oo_last_closed_stid; | |
3559 | if (!s) | |
3560 | return; | |
3561 | if (!(oo->oo_flags & NFS4_OO_PURGE_CLOSE)) { | |
3562 | /* Release the last_closed_stid on the next seqid bump: */ | |
3563 | oo->oo_flags |= NFS4_OO_PURGE_CLOSE; | |
3564 | return; | |
3565 | } | |
3566 | oo->oo_flags &= ~NFS4_OO_PURGE_CLOSE; | |
3567 | free_generic_stateid(oo->oo_last_closed_stid); | |
3568 | oo->oo_last_closed_stid = NULL; | |
3569 | } | |
3570 | ||
1da177e4 LT |
3571 | /* |
3572 | * nfs4_unlock_state() called after encode | |
3573 | */ | |
b37ad28b | 3574 | __be32 |
ca364317 | 3575 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3576 | struct nfsd4_close *close) |
1da177e4 | 3577 | { |
b37ad28b | 3578 | __be32 status; |
fe0750e5 | 3579 | struct nfs4_openowner *oo; |
dcef0413 | 3580 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
3581 | |
3582 | dprintk("NFSD: nfsd4_close on file %.*s\n", | |
ca364317 BF |
3583 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3584 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 LT |
3585 | |
3586 | nfs4_lock_state(); | |
3587 | /* check close_lru for replay */ | |
c0a5d93e BF |
3588 | status = nfs4_preprocess_confirmed_seqid_op(cstate, close->cl_seqid, |
3589 | &close->cl_stateid, &stp); | |
f4dee24c BF |
3590 | if (stp == NULL && status == nfserr_expired) { |
3591 | /* | |
3592 | * Also, we should make sure this isn't just the result of | |
3593 | * a replayed close: | |
3594 | */ | |
38c387b5 | 3595 | oo = search_close_lru(&close->cl_stateid); |
f4dee24c | 3596 | /* It's not stale; let's assume it's expired: */ |
fe0750e5 | 3597 | if (oo == NULL) |
f4dee24c | 3598 | goto out; |
fe0750e5 BF |
3599 | cstate->replay_owner = &oo->oo_owner; |
3600 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, close->cl_seqid); | |
f4dee24c BF |
3601 | if (status) |
3602 | goto out; | |
3603 | status = nfserr_bad_seqid; | |
3604 | } | |
9072d5c6 | 3605 | if (status) |
1da177e4 | 3606 | goto out; |
fe0750e5 | 3607 | oo = openowner(stp->st_stateowner); |
1da177e4 | 3608 | status = nfs_ok; |
dcef0413 BF |
3609 | update_stateid(&stp->st_stid.sc_stateid); |
3610 | memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3611 | |
38c387b5 BF |
3612 | /* unhash_open_stateid() calls nfsd_close() if needed */ |
3613 | oo->oo_last_closed_stid = stp; | |
3614 | unhash_open_stateid(stp); | |
04ef5954 BF |
3615 | |
3616 | /* place unused nfs4_stateowners on so_close_lru list to be | |
3617 | * released by the laundromat service after the lease period | |
3618 | * to enable us to handle CLOSE replay | |
3619 | */ | |
fe0750e5 BF |
3620 | if (list_empty(&oo->oo_owner.so_stateids)) |
3621 | move_to_close_lru(oo); | |
1da177e4 | 3622 | out: |
5ec094c1 BF |
3623 | if (!cstate->replay_owner) |
3624 | nfs4_unlock_state(); | |
1da177e4 LT |
3625 | return status; |
3626 | } | |
3627 | ||
b37ad28b | 3628 | __be32 |
ca364317 BF |
3629 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3630 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 3631 | { |
203a8c8e BF |
3632 | struct nfs4_delegation *dp; |
3633 | stateid_t *stateid = &dr->dr_stateid; | |
3634 | struct inode *inode; | |
b37ad28b | 3635 | __be32 status; |
1da177e4 | 3636 | |
ca364317 | 3637 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e BF |
3638 | return status; |
3639 | inode = cstate->current_fh.fh_dentry->d_inode; | |
1da177e4 LT |
3640 | |
3641 | nfs4_lock_state(); | |
203a8c8e BF |
3642 | status = nfserr_bad_stateid; |
3643 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3644 | goto out; | |
3645 | status = nfserr_stale_stateid; | |
3646 | if (STALE_STATEID(stateid)) | |
3647 | goto out; | |
33515142 | 3648 | status = nfserr_expired; |
f459e453 | 3649 | dp = find_deleg_stateid(stateid); |
e4e83ea4 | 3650 | if (!dp) |
203a8c8e | 3651 | goto out; |
d5477a8d | 3652 | status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); |
203a8c8e BF |
3653 | if (status) |
3654 | goto out; | |
3655 | renew_client(dp->dl_client); | |
3656 | ||
3657 | unhash_delegation(dp); | |
1da177e4 | 3658 | out: |
203a8c8e BF |
3659 | nfs4_unlock_state(); |
3660 | ||
1da177e4 LT |
3661 | return status; |
3662 | } | |
3663 | ||
3664 | ||
3665 | /* | |
3666 | * Lock owner state (byte-range locks) | |
3667 | */ | |
3668 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) | |
3669 | #define LOCK_HASH_BITS 8 | |
3670 | #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) | |
3671 | #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) | |
3672 | ||
87df4de8 BH |
3673 | static inline u64 |
3674 | end_offset(u64 start, u64 len) | |
3675 | { | |
3676 | u64 end; | |
3677 | ||
3678 | end = start + len; | |
3679 | return end >= start ? end: NFS4_MAX_UINT64; | |
3680 | } | |
3681 | ||
3682 | /* last octet in a range */ | |
3683 | static inline u64 | |
3684 | last_byte_offset(u64 start, u64 len) | |
3685 | { | |
3686 | u64 end; | |
3687 | ||
3688 | BUG_ON(!len); | |
3689 | end = start + len; | |
3690 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
3691 | } | |
3692 | ||
1da177e4 LT |
3693 | static inline unsigned int |
3694 | lock_ownerstr_hashval(struct inode *inode, u32 cl_id, | |
3695 | struct xdr_netobj *ownername) | |
3696 | { | |
3697 | return (file_hashval(inode) + cl_id | |
3698 | + opaque_hashval(ownername->data, ownername->len)) | |
3699 | & LOCK_HASH_MASK; | |
3700 | } | |
3701 | ||
1da177e4 | 3702 | static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; |
1da177e4 | 3703 | |
1da177e4 LT |
3704 | /* |
3705 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
3706 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
3707 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
3708 | * locking, this prevents us from being completely protocol-compliant. The | |
3709 | * real solution to this problem is to start using unsigned file offsets in | |
3710 | * the VFS, but this is a very deep change! | |
3711 | */ | |
3712 | static inline void | |
3713 | nfs4_transform_lock_offset(struct file_lock *lock) | |
3714 | { | |
3715 | if (lock->fl_start < 0) | |
3716 | lock->fl_start = OFFSET_MAX; | |
3717 | if (lock->fl_end < 0) | |
3718 | lock->fl_end = OFFSET_MAX; | |
3719 | } | |
3720 | ||
d5b9026a N |
3721 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
3722 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 3723 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 3724 | }; |
1da177e4 LT |
3725 | |
3726 | static inline void | |
3727 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
3728 | { | |
fe0750e5 | 3729 | struct nfs4_lockowner *lo; |
1da177e4 | 3730 | |
d5b9026a | 3731 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 BF |
3732 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
3733 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, | |
3734 | lo->lo_owner.so_owner.len, GFP_KERNEL); | |
7c13f344 BF |
3735 | if (!deny->ld_owner.data) |
3736 | /* We just don't care that much */ | |
3737 | goto nevermind; | |
fe0750e5 BF |
3738 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
3739 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; | |
d5b9026a | 3740 | } else { |
7c13f344 BF |
3741 | nevermind: |
3742 | deny->ld_owner.len = 0; | |
3743 | deny->ld_owner.data = NULL; | |
d5b9026a N |
3744 | deny->ld_clientid.cl_boot = 0; |
3745 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
3746 | } |
3747 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
3748 | deny->ld_length = NFS4_MAX_UINT64; |
3749 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
3750 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
3751 | deny->ld_type = NFS4_READ_LT; | |
3752 | if (fl->fl_type != F_RDLCK) | |
3753 | deny->ld_type = NFS4_WRITE_LT; | |
3754 | } | |
3755 | ||
fe0750e5 BF |
3756 | static struct nfs4_lockowner * |
3757 | find_lockowner_str(struct inode *inode, clientid_t *clid, | |
1da177e4 LT |
3758 | struct xdr_netobj *owner) |
3759 | { | |
3760 | unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); | |
3761 | struct nfs4_stateowner *op; | |
3762 | ||
3763 | list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { | |
599e0a22 | 3764 | if (same_owner_str(op, owner, clid)) |
fe0750e5 | 3765 | return lockowner(op); |
1da177e4 LT |
3766 | } |
3767 | return NULL; | |
3768 | } | |
3769 | ||
dcef0413 | 3770 | static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp) |
ff194bd9 | 3771 | { |
fe0750e5 BF |
3772 | list_add(&lo->lo_owner.so_strhash, &lock_ownerstr_hashtbl[strhashval]); |
3773 | list_add(&lo->lo_perstateid, &open_stp->st_lockowners); | |
ff194bd9 BF |
3774 | } |
3775 | ||
1da177e4 LT |
3776 | /* |
3777 | * Alloc a lock owner structure. | |
3778 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 3779 | * occurred. |
1da177e4 LT |
3780 | * |
3781 | * strhashval = lock_ownerstr_hashval | |
1da177e4 LT |
3782 | */ |
3783 | ||
fe0750e5 | 3784 | static struct nfs4_lockowner * |
dcef0413 | 3785 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) { |
fe0750e5 | 3786 | struct nfs4_lockowner *lo; |
1da177e4 | 3787 | |
fe0750e5 BF |
3788 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
3789 | if (!lo) | |
1da177e4 | 3790 | return NULL; |
fe0750e5 BF |
3791 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
3792 | lo->lo_owner.so_is_open_owner = 0; | |
b59e3c0e NB |
3793 | /* It is the openowner seqid that will be incremented in encode in the |
3794 | * case of new lockowners; so increment the lock seqid manually: */ | |
fe0750e5 BF |
3795 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; |
3796 | hash_lockowner(lo, strhashval, clp, open_stp); | |
3797 | return lo; | |
1da177e4 LT |
3798 | } |
3799 | ||
dcef0413 BF |
3800 | static struct nfs4_ol_stateid * |
3801 | alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 3802 | { |
dcef0413 | 3803 | struct nfs4_ol_stateid *stp; |
d3b313a4 | 3804 | struct nfs4_client *clp = lo->lo_owner.so_client; |
1da177e4 | 3805 | |
5ac049ac N |
3806 | stp = nfs4_alloc_stateid(); |
3807 | if (stp == NULL) | |
1da177e4 | 3808 | goto out; |
8beefa24 | 3809 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 BF |
3810 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
3811 | stp->st_stateowner = &lo->lo_owner; | |
dcef0413 | 3812 | stp->st_stid.sc_type = NFS4_LOCK_STID; |
13cd2184 | 3813 | get_nfs4_file(fp); |
1da177e4 | 3814 | stp->st_file = fp; |
d3b313a4 BF |
3815 | stp->st_stid.sc_stateid.si_opaque.so_clid = clp->cl_clientid; |
3816 | stp->st_stid.sc_stateid.si_opaque.so_id = current_stateid++; | |
73997dc4 | 3817 | /* note will be incremented before first return to client: */ |
dcef0413 | 3818 | stp->st_stid.sc_stateid.si_generation = 0; |
36d44c60 | 3819 | hash_stid(&stp->st_stid); |
0997b173 | 3820 | stp->st_access_bmap = 0; |
1da177e4 | 3821 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 3822 | stp->st_openstp = open_stp; |
1da177e4 LT |
3823 | |
3824 | out: | |
3825 | return stp; | |
3826 | } | |
3827 | ||
fd39ca9a | 3828 | static int |
1da177e4 LT |
3829 | check_lock_length(u64 offset, u64 length) |
3830 | { | |
87df4de8 | 3831 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
3832 | LOFF_OVERFLOW(offset, length))); |
3833 | } | |
3834 | ||
dcef0413 | 3835 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 BF |
3836 | { |
3837 | struct nfs4_file *fp = lock_stp->st_file; | |
3838 | int oflag = nfs4_access_to_omode(access); | |
3839 | ||
3840 | if (test_bit(access, &lock_stp->st_access_bmap)) | |
3841 | return; | |
3842 | nfs4_file_get_access(fp, oflag); | |
3843 | __set_bit(access, &lock_stp->st_access_bmap); | |
3844 | } | |
3845 | ||
1da177e4 LT |
3846 | /* |
3847 | * LOCK operation | |
3848 | */ | |
b37ad28b | 3849 | __be32 |
ca364317 | 3850 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3851 | struct nfsd4_lock *lock) |
1da177e4 | 3852 | { |
fe0750e5 BF |
3853 | struct nfs4_openowner *open_sop = NULL; |
3854 | struct nfs4_lockowner *lock_sop = NULL; | |
dcef0413 | 3855 | struct nfs4_ol_stateid *lock_stp; |
7d947842 BF |
3856 | struct nfs4_file *fp; |
3857 | struct file *filp = NULL; | |
1da177e4 | 3858 | struct file_lock file_lock; |
8dc7c311 | 3859 | struct file_lock conflock; |
b37ad28b | 3860 | __be32 status = 0; |
1da177e4 | 3861 | unsigned int strhashval; |
b34f27aa | 3862 | int lkflg; |
b8dd7b9a | 3863 | int err; |
1da177e4 LT |
3864 | |
3865 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
3866 | (long long) lock->lk_offset, | |
3867 | (long long) lock->lk_length); | |
3868 | ||
1da177e4 LT |
3869 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
3870 | return nfserr_inval; | |
3871 | ||
ca364317 | 3872 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 3873 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
3874 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
3875 | return status; | |
3876 | } | |
3877 | ||
1da177e4 LT |
3878 | nfs4_lock_state(); |
3879 | ||
3880 | if (lock->lk_is_new) { | |
893f8770 N |
3881 | /* |
3882 | * Client indicates that this is a new lockowner. | |
3883 | * Use open owner and open stateid to create lock owner and | |
3884 | * lock stateid. | |
3885 | */ | |
dcef0413 | 3886 | struct nfs4_ol_stateid *open_stp = NULL; |
1da177e4 LT |
3887 | |
3888 | status = nfserr_stale_clientid; | |
60adfc50 AA |
3889 | if (!nfsd4_has_session(cstate) && |
3890 | STALE_CLIENTID(&lock->lk_new_clientid)) | |
1da177e4 | 3891 | goto out; |
1da177e4 | 3892 | |
1da177e4 | 3893 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 3894 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
3895 | lock->lk_new_open_seqid, |
3896 | &lock->lk_new_open_stateid, | |
c0a5d93e | 3897 | &open_stp); |
37515177 | 3898 | if (status) |
1da177e4 | 3899 | goto out; |
fe0750e5 | 3900 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 3901 | status = nfserr_bad_stateid; |
b34f27aa | 3902 | if (!nfsd4_has_session(cstate) && |
fe0750e5 | 3903 | !same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
b34f27aa BF |
3904 | &lock->v.new.clientid)) |
3905 | goto out; | |
1da177e4 LT |
3906 | /* create lockowner and lock stateid */ |
3907 | fp = open_stp->st_file; | |
fe0750e5 BF |
3908 | strhashval = lock_ownerstr_hashval(fp->fi_inode, |
3909 | open_sop->oo_owner.so_client->cl_clientid.cl_id, | |
1da177e4 | 3910 | &lock->v.new.owner); |
3e9e3dbe N |
3911 | /* XXX: Do we need to check for duplicate stateowners on |
3912 | * the same file, or should they just be allowed (and | |
3913 | * create new stateids)? */ | |
3e772463 | 3914 | status = nfserr_jukebox; |
b59e3c0e | 3915 | lock_sop = alloc_init_lock_stateowner(strhashval, |
fe0750e5 | 3916 | open_sop->oo_owner.so_client, open_stp, lock); |
b59e3c0e | 3917 | if (lock_sop == NULL) |
1da177e4 | 3918 | goto out; |
b59e3c0e | 3919 | lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); |
8a280510 | 3920 | if (lock_stp == NULL) |
1da177e4 | 3921 | goto out; |
1da177e4 LT |
3922 | } else { |
3923 | /* lock (lock owner + lock stateid) already exists */ | |
dd453dfd | 3924 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
3925 | lock->lk_old_lock_seqid, |
3926 | &lock->lk_old_lock_stateid, | |
2288d0e3 | 3927 | NFS4_LOCK_STID, &lock_stp); |
1da177e4 LT |
3928 | if (status) |
3929 | goto out; | |
fe0750e5 | 3930 | lock_sop = lockowner(lock_stp->st_stateowner); |
7d947842 | 3931 | fp = lock_stp->st_file; |
1da177e4 | 3932 | } |
9072d5c6 | 3933 | /* lock_sop and lock_stp have been created or found */ |
1da177e4 | 3934 | |
b34f27aa BF |
3935 | lkflg = setlkflg(lock->lk_type); |
3936 | status = nfs4_check_openmode(lock_stp, lkflg); | |
3937 | if (status) | |
3938 | goto out; | |
3939 | ||
0dd395dc | 3940 | status = nfserr_grace; |
af558e33 | 3941 | if (locks_in_grace() && !lock->lk_reclaim) |
0dd395dc N |
3942 | goto out; |
3943 | status = nfserr_no_grace; | |
af558e33 | 3944 | if (!locks_in_grace() && lock->lk_reclaim) |
0dd395dc N |
3945 | goto out; |
3946 | ||
1da177e4 LT |
3947 | locks_init_lock(&file_lock); |
3948 | switch (lock->lk_type) { | |
3949 | case NFS4_READ_LT: | |
3950 | case NFS4_READW_LT: | |
0997b173 BF |
3951 | filp = find_readable_file(lock_stp->st_file); |
3952 | if (filp) | |
3953 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
1da177e4 | 3954 | file_lock.fl_type = F_RDLCK; |
529d7b2a | 3955 | break; |
1da177e4 LT |
3956 | case NFS4_WRITE_LT: |
3957 | case NFS4_WRITEW_LT: | |
0997b173 BF |
3958 | filp = find_writeable_file(lock_stp->st_file); |
3959 | if (filp) | |
3960 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
1da177e4 | 3961 | file_lock.fl_type = F_WRLCK; |
529d7b2a | 3962 | break; |
1da177e4 LT |
3963 | default: |
3964 | status = nfserr_inval; | |
3965 | goto out; | |
3966 | } | |
f9d7562f BF |
3967 | if (!filp) { |
3968 | status = nfserr_openmode; | |
3969 | goto out; | |
3970 | } | |
b59e3c0e | 3971 | file_lock.fl_owner = (fl_owner_t)lock_sop; |
1da177e4 LT |
3972 | file_lock.fl_pid = current->tgid; |
3973 | file_lock.fl_file = filp; | |
3974 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 3975 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
3976 | |
3977 | file_lock.fl_start = lock->lk_offset; | |
87df4de8 | 3978 | file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); |
1da177e4 LT |
3979 | nfs4_transform_lock_offset(&file_lock); |
3980 | ||
3981 | /* | |
3982 | * Try to lock the file in the VFS. | |
3983 | * Note: locks.c uses the BKL to protect the inode's lock list. | |
3984 | */ | |
3985 | ||
529d7b2a | 3986 | err = vfs_lock_file(filp, F_SETLK, &file_lock, &conflock); |
b8dd7b9a | 3987 | switch (-err) { |
1da177e4 | 3988 | case 0: /* success! */ |
dcef0413 BF |
3989 | update_stateid(&lock_stp->st_stid.sc_stateid); |
3990 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, | |
1da177e4 | 3991 | sizeof(stateid_t)); |
b8dd7b9a | 3992 | status = 0; |
eb76b3fd AA |
3993 | break; |
3994 | case (EAGAIN): /* conflock holds conflicting lock */ | |
3995 | status = nfserr_denied; | |
3996 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
3997 | nfs4_set_lock_denied(&conflock, &lock->lk_denied); | |
3998 | break; | |
1da177e4 LT |
3999 | case (EDEADLK): |
4000 | status = nfserr_deadlock; | |
eb76b3fd | 4001 | break; |
3e772463 | 4002 | default: |
fd85b817 | 4003 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 4004 | status = nfserrno(err); |
eb76b3fd | 4005 | break; |
1da177e4 | 4006 | } |
1da177e4 | 4007 | out: |
8a280510 | 4008 | if (status && lock->lk_is_new && lock_sop) |
f044ff83 | 4009 | release_lockowner(lock_sop); |
5ec094c1 BF |
4010 | if (!cstate->replay_owner) |
4011 | nfs4_unlock_state(); | |
1da177e4 LT |
4012 | return status; |
4013 | } | |
4014 | ||
55ef1274 BF |
4015 | /* |
4016 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
4017 | * so we do a temporary open here just to get an open file to pass to | |
4018 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
4019 | * inode operation.) | |
4020 | */ | |
4021 | static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) | |
4022 | { | |
4023 | struct file *file; | |
4024 | int err; | |
4025 | ||
4026 | err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); | |
4027 | if (err) | |
4028 | return err; | |
4029 | err = vfs_test_lock(file, lock); | |
4030 | nfsd_close(file); | |
4031 | return err; | |
4032 | } | |
4033 | ||
1da177e4 LT |
4034 | /* |
4035 | * LOCKT operation | |
4036 | */ | |
b37ad28b | 4037 | __be32 |
ca364317 BF |
4038 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4039 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
4040 | { |
4041 | struct inode *inode; | |
1da177e4 | 4042 | struct file_lock file_lock; |
fe0750e5 | 4043 | struct nfs4_lockowner *lo; |
fd85b817 | 4044 | int error; |
b37ad28b | 4045 | __be32 status; |
1da177e4 | 4046 | |
af558e33 | 4047 | if (locks_in_grace()) |
1da177e4 LT |
4048 | return nfserr_grace; |
4049 | ||
4050 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
4051 | return nfserr_inval; | |
4052 | ||
1da177e4 LT |
4053 | nfs4_lock_state(); |
4054 | ||
4055 | status = nfserr_stale_clientid; | |
60adfc50 | 4056 | if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) |
1da177e4 | 4057 | goto out; |
1da177e4 | 4058 | |
75c096f7 | 4059 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 4060 | goto out; |
1da177e4 | 4061 | |
ca364317 | 4062 | inode = cstate->current_fh.fh_dentry->d_inode; |
1da177e4 LT |
4063 | locks_init_lock(&file_lock); |
4064 | switch (lockt->lt_type) { | |
4065 | case NFS4_READ_LT: | |
4066 | case NFS4_READW_LT: | |
4067 | file_lock.fl_type = F_RDLCK; | |
4068 | break; | |
4069 | case NFS4_WRITE_LT: | |
4070 | case NFS4_WRITEW_LT: | |
4071 | file_lock.fl_type = F_WRLCK; | |
4072 | break; | |
4073 | default: | |
2fdada03 | 4074 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
4075 | status = nfserr_inval; |
4076 | goto out; | |
4077 | } | |
4078 | ||
fe0750e5 BF |
4079 | lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner); |
4080 | if (lo) | |
4081 | file_lock.fl_owner = (fl_owner_t)lo; | |
1da177e4 LT |
4082 | file_lock.fl_pid = current->tgid; |
4083 | file_lock.fl_flags = FL_POSIX; | |
4084 | ||
4085 | file_lock.fl_start = lockt->lt_offset; | |
87df4de8 | 4086 | file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); |
1da177e4 LT |
4087 | |
4088 | nfs4_transform_lock_offset(&file_lock); | |
4089 | ||
1da177e4 | 4090 | status = nfs_ok; |
55ef1274 | 4091 | error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); |
fd85b817 ME |
4092 | if (error) { |
4093 | status = nfserrno(error); | |
4094 | goto out; | |
4095 | } | |
9d6a8c5c | 4096 | if (file_lock.fl_type != F_UNLCK) { |
1da177e4 | 4097 | status = nfserr_denied; |
9d6a8c5c | 4098 | nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); |
1da177e4 LT |
4099 | } |
4100 | out: | |
4101 | nfs4_unlock_state(); | |
4102 | return status; | |
4103 | } | |
4104 | ||
b37ad28b | 4105 | __be32 |
ca364317 | 4106 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4107 | struct nfsd4_locku *locku) |
1da177e4 | 4108 | { |
dcef0413 | 4109 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
4110 | struct file *filp = NULL; |
4111 | struct file_lock file_lock; | |
b37ad28b | 4112 | __be32 status; |
b8dd7b9a | 4113 | int err; |
1da177e4 LT |
4114 | |
4115 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", | |
4116 | (long long) locku->lu_offset, | |
4117 | (long long) locku->lu_length); | |
4118 | ||
4119 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
4120 | return nfserr_inval; | |
4121 | ||
4122 | nfs4_lock_state(); | |
4123 | ||
9072d5c6 | 4124 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
2288d0e3 | 4125 | &locku->lu_stateid, NFS4_LOCK_STID, &stp); |
9072d5c6 | 4126 | if (status) |
1da177e4 | 4127 | goto out; |
f9d7562f BF |
4128 | filp = find_any_file(stp->st_file); |
4129 | if (!filp) { | |
4130 | status = nfserr_lock_range; | |
4131 | goto out; | |
4132 | } | |
1da177e4 LT |
4133 | BUG_ON(!filp); |
4134 | locks_init_lock(&file_lock); | |
4135 | file_lock.fl_type = F_UNLCK; | |
fe0750e5 | 4136 | file_lock.fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); |
1da177e4 LT |
4137 | file_lock.fl_pid = current->tgid; |
4138 | file_lock.fl_file = filp; | |
4139 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 4140 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
4141 | file_lock.fl_start = locku->lu_offset; |
4142 | ||
87df4de8 | 4143 | file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); |
1da177e4 LT |
4144 | nfs4_transform_lock_offset(&file_lock); |
4145 | ||
4146 | /* | |
4147 | * Try to unlock the file in the VFS. | |
4148 | */ | |
fd85b817 | 4149 | err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); |
b8dd7b9a | 4150 | if (err) { |
fd85b817 | 4151 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
4152 | goto out_nfserr; |
4153 | } | |
4154 | /* | |
4155 | * OK, unlock succeeded; the only thing left to do is update the stateid. | |
4156 | */ | |
dcef0413 BF |
4157 | update_stateid(&stp->st_stid.sc_stateid); |
4158 | memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
4159 | |
4160 | out: | |
1da177e4 LT |
4161 | nfs4_unlock_state(); |
4162 | return status; | |
4163 | ||
4164 | out_nfserr: | |
b8dd7b9a | 4165 | status = nfserrno(err); |
1da177e4 LT |
4166 | goto out; |
4167 | } | |
4168 | ||
4169 | /* | |
4170 | * returns | |
4171 | * 1: locks held by lockowner | |
4172 | * 0: no locks held by lockowner | |
4173 | */ | |
4174 | static int | |
fe0750e5 | 4175 | check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner) |
1da177e4 LT |
4176 | { |
4177 | struct file_lock **flpp; | |
f9d7562f | 4178 | struct inode *inode = filp->fi_inode; |
1da177e4 LT |
4179 | int status = 0; |
4180 | ||
b89f4321 | 4181 | lock_flocks(); |
1da177e4 | 4182 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
796dadfd | 4183 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
4184 | status = 1; |
4185 | goto out; | |
796dadfd | 4186 | } |
1da177e4 LT |
4187 | } |
4188 | out: | |
b89f4321 | 4189 | unlock_flocks(); |
1da177e4 LT |
4190 | return status; |
4191 | } | |
4192 | ||
b37ad28b | 4193 | __be32 |
b591480b BF |
4194 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
4195 | struct nfsd4_compound_state *cstate, | |
4196 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
4197 | { |
4198 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe | 4199 | struct nfs4_stateowner *sop; |
fe0750e5 | 4200 | struct nfs4_lockowner *lo; |
dcef0413 | 4201 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4202 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe N |
4203 | struct list_head matches; |
4204 | int i; | |
b37ad28b | 4205 | __be32 status; |
1da177e4 LT |
4206 | |
4207 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
4208 | clid->cl_boot, clid->cl_id); | |
4209 | ||
4210 | /* XXX check for lease expiration */ | |
4211 | ||
4212 | status = nfserr_stale_clientid; | |
849823c5 | 4213 | if (STALE_CLIENTID(clid)) |
1da177e4 | 4214 | return status; |
1da177e4 LT |
4215 | |
4216 | nfs4_lock_state(); | |
4217 | ||
3e9e3dbe N |
4218 | status = nfserr_locks_held; |
4219 | /* XXX: we're doing a linear search through all the lockowners. | |
4220 | * Yipes! For now we'll just hope clients aren't really using | |
4221 | * release_lockowner much, but eventually we have to fix these | |
4222 | * data structures. */ | |
4223 | INIT_LIST_HEAD(&matches); | |
4224 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
d3b313a4 | 4225 | list_for_each_entry(sop, &lock_ownerstr_hashtbl[i], so_strhash) { |
599e0a22 | 4226 | if (!same_owner_str(sop, owner, clid)) |
3e9e3dbe N |
4227 | continue; |
4228 | list_for_each_entry(stp, &sop->so_stateids, | |
4229 | st_perstateowner) { | |
fe0750e5 BF |
4230 | lo = lockowner(sop); |
4231 | if (check_for_locks(stp->st_file, lo)) | |
3e9e3dbe | 4232 | goto out; |
fe0750e5 | 4233 | list_add(&lo->lo_list, &matches); |
3e9e3dbe | 4234 | } |
1da177e4 | 4235 | } |
3e9e3dbe N |
4236 | } |
4237 | /* Clients probably won't expect us to return with some (but not all) | |
4238 | * of the lockowner state released; so don't release any until all | |
4239 | * have been checked. */ | |
4240 | status = nfs_ok; | |
0fa822e4 | 4241 | while (!list_empty(&matches)) { |
fe0750e5 BF |
4242 | lo = list_entry(matches.next, struct nfs4_lockowner, |
4243 | lo_list); | |
0fa822e4 N |
4244 | /* unhash_stateowner deletes so_perclient only |
4245 | * for openowners. */ | |
fe0750e5 BF |
4246 | list_del(&lo->lo_list); |
4247 | release_lockowner(lo); | |
1da177e4 LT |
4248 | } |
4249 | out: | |
4250 | nfs4_unlock_state(); | |
4251 | return status; | |
4252 | } | |
4253 | ||
4254 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 4255 | alloc_reclaim(void) |
1da177e4 | 4256 | { |
a55370a3 | 4257 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
4258 | } |
4259 | ||
c7b9a459 | 4260 | int |
a1bcecd2 | 4261 | nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) |
c7b9a459 N |
4262 | { |
4263 | unsigned int strhashval = clientstr_hashval(name); | |
4264 | struct nfs4_client *clp; | |
4265 | ||
e203d506 | 4266 | clp = find_confirmed_client_by_str(name, strhashval); |
c7b9a459 N |
4267 | return clp ? 1 : 0; |
4268 | } | |
4269 | ||
1da177e4 LT |
4270 | /* |
4271 | * failure => all reset bets are off, nfserr_no_grace... | |
4272 | */ | |
190e4fbf N |
4273 | int |
4274 | nfs4_client_to_reclaim(const char *name) | |
1da177e4 LT |
4275 | { |
4276 | unsigned int strhashval; | |
4277 | struct nfs4_client_reclaim *crp = NULL; | |
4278 | ||
a55370a3 N |
4279 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
4280 | crp = alloc_reclaim(); | |
1da177e4 LT |
4281 | if (!crp) |
4282 | return 0; | |
a55370a3 | 4283 | strhashval = clientstr_hashval(name); |
1da177e4 LT |
4284 | INIT_LIST_HEAD(&crp->cr_strhash); |
4285 | list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); | |
a55370a3 | 4286 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
1da177e4 LT |
4287 | reclaim_str_hashtbl_size++; |
4288 | return 1; | |
4289 | } | |
4290 | ||
4291 | static void | |
4292 | nfs4_release_reclaim(void) | |
4293 | { | |
4294 | struct nfs4_client_reclaim *crp = NULL; | |
4295 | int i; | |
4296 | ||
1da177e4 LT |
4297 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4298 | while (!list_empty(&reclaim_str_hashtbl[i])) { | |
4299 | crp = list_entry(reclaim_str_hashtbl[i].next, | |
4300 | struct nfs4_client_reclaim, cr_strhash); | |
4301 | list_del(&crp->cr_strhash); | |
1da177e4 LT |
4302 | kfree(crp); |
4303 | reclaim_str_hashtbl_size--; | |
4304 | } | |
4305 | } | |
4306 | BUG_ON(reclaim_str_hashtbl_size); | |
4307 | } | |
4308 | ||
4309 | /* | |
4310 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
fd39ca9a | 4311 | static struct nfs4_client_reclaim * |
1da177e4 LT |
4312 | nfs4_find_reclaim_client(clientid_t *clid) |
4313 | { | |
4314 | unsigned int strhashval; | |
4315 | struct nfs4_client *clp; | |
4316 | struct nfs4_client_reclaim *crp = NULL; | |
4317 | ||
4318 | ||
4319 | /* find clientid in conf_id_hashtbl */ | |
4320 | clp = find_confirmed_client(clid); | |
4321 | if (clp == NULL) | |
4322 | return NULL; | |
4323 | ||
a55370a3 N |
4324 | dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", |
4325 | clp->cl_name.len, clp->cl_name.data, | |
4326 | clp->cl_recdir); | |
1da177e4 LT |
4327 | |
4328 | /* find clp->cl_name in reclaim_str_hashtbl */ | |
a55370a3 | 4329 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 | 4330 | list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { |
a55370a3 | 4331 | if (same_name(crp->cr_recdir, clp->cl_recdir)) { |
1da177e4 LT |
4332 | return crp; |
4333 | } | |
4334 | } | |
4335 | return NULL; | |
4336 | } | |
4337 | ||
4338 | /* | |
4339 | * Called from OPEN. Look for clientid in reclaim list. | |
4340 | */ | |
b37ad28b | 4341 | __be32 |
1da177e4 LT |
4342 | nfs4_check_open_reclaim(clientid_t *clid) |
4343 | { | |
dfc83565 | 4344 | return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; |
1da177e4 LT |
4345 | } |
4346 | ||
ac4d8ff2 | 4347 | /* initialization to perform at module load time: */ |
1da177e4 | 4348 | |
e8ff2a84 | 4349 | int |
ac4d8ff2 | 4350 | nfs4_state_init(void) |
1da177e4 | 4351 | { |
e8ff2a84 | 4352 | int i, status; |
1da177e4 | 4353 | |
e8ff2a84 BF |
4354 | status = nfsd4_init_slabs(); |
4355 | if (status) | |
4356 | return status; | |
1da177e4 LT |
4357 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4358 | INIT_LIST_HEAD(&conf_id_hashtbl[i]); | |
4359 | INIT_LIST_HEAD(&conf_str_hashtbl[i]); | |
4360 | INIT_LIST_HEAD(&unconf_str_hashtbl[i]); | |
4361 | INIT_LIST_HEAD(&unconf_id_hashtbl[i]); | |
02cb2858 | 4362 | INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); |
1da177e4 | 4363 | } |
5282fd72 ME |
4364 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
4365 | INIT_LIST_HEAD(&sessionid_hashtbl[i]); | |
1da177e4 LT |
4366 | for (i = 0; i < FILE_HASH_SIZE; i++) { |
4367 | INIT_LIST_HEAD(&file_hashtbl[i]); | |
4368 | } | |
506f275f BF |
4369 | for (i = 0; i < OPEN_OWNER_HASH_SIZE; i++) { |
4370 | INIT_LIST_HEAD(&open_ownerstr_hashtbl[i]); | |
1da177e4 | 4371 | } |
b79abadd | 4372 | for (i = 0; i < STATEID_HASH_SIZE; i++) |
1da177e4 | 4373 | INIT_LIST_HEAD(&stateid_hashtbl[i]); |
1da177e4 | 4374 | for (i = 0; i < LOCK_HASH_SIZE; i++) { |
1da177e4 LT |
4375 | INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); |
4376 | } | |
1da177e4 | 4377 | memset(&onestateid, ~0, sizeof(stateid_t)); |
1da177e4 LT |
4378 | INIT_LIST_HEAD(&close_lru); |
4379 | INIT_LIST_HEAD(&client_lru); | |
4380 | INIT_LIST_HEAD(&del_recall_lru); | |
ac4d8ff2 | 4381 | reclaim_str_hashtbl_size = 0; |
e8ff2a84 | 4382 | return 0; |
ac4d8ff2 N |
4383 | } |
4384 | ||
190e4fbf N |
4385 | static void |
4386 | nfsd4_load_reboot_recovery_data(void) | |
4387 | { | |
4388 | int status; | |
4389 | ||
0964a3d3 | 4390 | nfs4_lock_state(); |
48483bf2 | 4391 | nfsd4_init_recdir(); |
190e4fbf | 4392 | status = nfsd4_recdir_load(); |
0964a3d3 | 4393 | nfs4_unlock_state(); |
190e4fbf N |
4394 | if (status) |
4395 | printk("NFSD: Failure reading reboot recovery data\n"); | |
4396 | } | |
4397 | ||
c2f1a551 MS |
4398 | /* |
4399 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
4400 | * client may quite reasonably hang on to a delegation as long as it has | |
4401 | * the inode cached. This becomes an obvious problem the first time a | |
4402 | * client's inode cache approaches the size of the server's total memory. | |
4403 | * | |
4404 | * For now we avoid this problem by imposing a hard limit on the number | |
4405 | * of delegations, which varies according to the server's memory size. | |
4406 | */ | |
4407 | static void | |
4408 | set_max_delegations(void) | |
4409 | { | |
4410 | /* | |
4411 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
4412 | * estimates suggest that in the worst case (where every delegation | |
4413 | * is for a different inode), a delegation could take about 1.5K, | |
4414 | * giving a worst case usage of about 6% of memory. | |
4415 | */ | |
4416 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
4417 | } | |
4418 | ||
ac4d8ff2 N |
4419 | /* initialization to perform when the nfsd service is started: */ |
4420 | ||
29ab23cc | 4421 | static int |
ac4d8ff2 N |
4422 | __nfs4_state_start(void) |
4423 | { | |
b5a1a81e BF |
4424 | int ret; |
4425 | ||
1da177e4 | 4426 | boot_time = get_seconds(); |
af558e33 | 4427 | locks_start_grace(&nfsd4_manager); |
9a8db97e | 4428 | printk(KERN_INFO "NFSD: starting %ld-second grace period\n", |
e46b498c | 4429 | nfsd4_grace); |
b5a1a81e BF |
4430 | ret = set_callback_cred(); |
4431 | if (ret) | |
4432 | return -ENOMEM; | |
58da282b | 4433 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
29ab23cc BF |
4434 | if (laundry_wq == NULL) |
4435 | return -ENOMEM; | |
b5a1a81e BF |
4436 | ret = nfsd4_create_callback_queue(); |
4437 | if (ret) | |
4438 | goto out_free_laundry; | |
e46b498c | 4439 | queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); |
c2f1a551 | 4440 | set_max_delegations(); |
b5a1a81e BF |
4441 | return 0; |
4442 | out_free_laundry: | |
4443 | destroy_workqueue(laundry_wq); | |
4444 | return ret; | |
1da177e4 LT |
4445 | } |
4446 | ||
29ab23cc | 4447 | int |
76a3550e | 4448 | nfs4_state_start(void) |
1da177e4 | 4449 | { |
190e4fbf | 4450 | nfsd4_load_reboot_recovery_data(); |
4ad9a344 | 4451 | return __nfs4_state_start(); |
1da177e4 LT |
4452 | } |
4453 | ||
1da177e4 LT |
4454 | static void |
4455 | __nfs4_state_shutdown(void) | |
4456 | { | |
4457 | int i; | |
4458 | struct nfs4_client *clp = NULL; | |
4459 | struct nfs4_delegation *dp = NULL; | |
1da177e4 LT |
4460 | struct list_head *pos, *next, reaplist; |
4461 | ||
1da177e4 LT |
4462 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4463 | while (!list_empty(&conf_id_hashtbl[i])) { | |
4464 | clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
4465 | expire_client(clp); | |
4466 | } | |
4467 | while (!list_empty(&unconf_str_hashtbl[i])) { | |
4468 | clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); | |
4469 | expire_client(clp); | |
4470 | } | |
4471 | } | |
4472 | INIT_LIST_HEAD(&reaplist); | |
4473 | spin_lock(&recall_lock); | |
4474 | list_for_each_safe(pos, next, &del_recall_lru) { | |
4475 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4476 | list_move(&dp->dl_recall_lru, &reaplist); | |
4477 | } | |
4478 | spin_unlock(&recall_lock); | |
4479 | list_for_each_safe(pos, next, &reaplist) { | |
4480 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4481 | list_del_init(&dp->dl_recall_lru); | |
4482 | unhash_delegation(dp); | |
4483 | } | |
4484 | ||
190e4fbf | 4485 | nfsd4_shutdown_recdir(); |
1da177e4 LT |
4486 | } |
4487 | ||
4488 | void | |
4489 | nfs4_state_shutdown(void) | |
4490 | { | |
afe2c511 | 4491 | cancel_delayed_work_sync(&laundromat_work); |
5e8d5c29 | 4492 | destroy_workqueue(laundry_wq); |
2c5e7615 | 4493 | locks_end_grace(&nfsd4_manager); |
1da177e4 LT |
4494 | nfs4_lock_state(); |
4495 | nfs4_release_reclaim(); | |
4496 | __nfs4_state_shutdown(); | |
1da177e4 | 4497 | nfs4_unlock_state(); |
c3935e30 | 4498 | nfsd4_destroy_callback_queue(); |
1da177e4 | 4499 | } |