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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (c) 2001 The Regents of the University of Michigan. |
3 | * All rights reserved. | |
4 | * | |
5 | * Kendrick Smith <kmsmith@umich.edu> | |
6 | * Andy Adamson <kandros@umich.edu> | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * | |
12 | * 1. Redistributions of source code must retain the above copyright | |
13 | * notice, this list of conditions and the following disclaimer. | |
14 | * 2. Redistributions in binary form must reproduce the above copyright | |
15 | * notice, this list of conditions and the following disclaimer in the | |
16 | * documentation and/or other materials provided with the distribution. | |
17 | * 3. Neither the name of the University nor the names of its | |
18 | * contributors may be used to endorse or promote products derived | |
19 | * from this software without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
22 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
23 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
24 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
26 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
27 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
28 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
29 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
30 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
31 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
32 | * | |
33 | */ | |
34 | ||
aceaf78d | 35 | #include <linux/file.h> |
b89f4321 | 36 | #include <linux/fs.h> |
5a0e3ad6 | 37 | #include <linux/slab.h> |
0964a3d3 | 38 | #include <linux/namei.h> |
c2f1a551 | 39 | #include <linux/swap.h> |
17456804 | 40 | #include <linux/pagemap.h> |
68e76ad0 | 41 | #include <linux/sunrpc/svcauth_gss.h> |
363168b4 | 42 | #include <linux/sunrpc/clnt.h> |
9a74af21 | 43 | #include "xdr4.h" |
0a3adade | 44 | #include "vfs.h" |
1da177e4 LT |
45 | |
46 | #define NFSDDBG_FACILITY NFSDDBG_PROC | |
47 | ||
48 | /* Globals */ | |
cf07d2ea | 49 | time_t nfsd4_lease = 90; /* default lease time */ |
efc4bb4f | 50 | time_t nfsd4_grace = 90; |
fd39ca9a | 51 | static time_t boot_time; |
1da177e4 LT |
52 | static u32 current_ownerid = 1; |
53 | static u32 current_fileid = 1; | |
54 | static u32 current_delegid = 1; | |
fd39ca9a N |
55 | static stateid_t zerostateid; /* bits all 0 */ |
56 | static stateid_t onestateid; /* bits all 1 */ | |
ec6b5d7b | 57 | static u64 current_sessionid = 1; |
fd39ca9a N |
58 | |
59 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t))) | |
60 | #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t))) | |
1da177e4 | 61 | |
1da177e4 | 62 | /* forward declarations */ |
fd39ca9a | 63 | static struct nfs4_stateid * find_stateid(stateid_t *stid, int flags); |
e1ca12df | 64 | static struct nfs4_delegation * search_for_delegation(stateid_t *stid); |
1da177e4 | 65 | static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid); |
fe0750e5 | 66 | static int check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner); |
1da177e4 | 67 | |
8b671b80 BF |
68 | /* Locking: */ |
69 | ||
70 | /* Currently used for almost all code touching nfsv4 state: */ | |
353ab6e9 | 71 | static DEFINE_MUTEX(client_mutex); |
1da177e4 | 72 | |
8b671b80 BF |
73 | /* |
74 | * Currently used for the del_recall_lru and file hash table. In an | |
75 | * effort to decrease the scope of the client_mutex, this spinlock may | |
76 | * eventually cover more: | |
77 | */ | |
78 | static DEFINE_SPINLOCK(recall_lock); | |
79 | ||
fe0750e5 BF |
80 | static struct kmem_cache *openowner_slab = NULL; |
81 | static struct kmem_cache *lockowner_slab = NULL; | |
e18b890b CL |
82 | static struct kmem_cache *file_slab = NULL; |
83 | static struct kmem_cache *stateid_slab = NULL; | |
84 | static struct kmem_cache *deleg_slab = NULL; | |
e60d4398 | 85 | |
1da177e4 LT |
86 | void |
87 | nfs4_lock_state(void) | |
88 | { | |
353ab6e9 | 89 | mutex_lock(&client_mutex); |
1da177e4 LT |
90 | } |
91 | ||
92 | void | |
93 | nfs4_unlock_state(void) | |
94 | { | |
353ab6e9 | 95 | mutex_unlock(&client_mutex); |
1da177e4 LT |
96 | } |
97 | ||
98 | static inline u32 | |
99 | opaque_hashval(const void *ptr, int nbytes) | |
100 | { | |
101 | unsigned char *cptr = (unsigned char *) ptr; | |
102 | ||
103 | u32 x = 0; | |
104 | while (nbytes--) { | |
105 | x *= 37; | |
106 | x += *cptr++; | |
107 | } | |
108 | return x; | |
109 | } | |
110 | ||
1da177e4 LT |
111 | static struct list_head del_recall_lru; |
112 | ||
13cd2184 N |
113 | static inline void |
114 | put_nfs4_file(struct nfs4_file *fi) | |
115 | { | |
8b671b80 BF |
116 | if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { |
117 | list_del(&fi->fi_hash); | |
118 | spin_unlock(&recall_lock); | |
119 | iput(fi->fi_inode); | |
120 | kmem_cache_free(file_slab, fi); | |
121 | } | |
13cd2184 N |
122 | } |
123 | ||
124 | static inline void | |
125 | get_nfs4_file(struct nfs4_file *fi) | |
126 | { | |
8b671b80 | 127 | atomic_inc(&fi->fi_ref); |
13cd2184 N |
128 | } |
129 | ||
ef0f3390 | 130 | static int num_delegations; |
c2f1a551 | 131 | unsigned int max_delegations; |
ef0f3390 N |
132 | |
133 | /* | |
134 | * Open owner state (share locks) | |
135 | */ | |
136 | ||
506f275f BF |
137 | /* hash tables for open owners */ |
138 | #define OPEN_OWNER_HASH_BITS 8 | |
139 | #define OPEN_OWNER_HASH_SIZE (1 << OPEN_OWNER_HASH_BITS) | |
140 | #define OPEN_OWNER_HASH_MASK (OPEN_OWNER_HASH_SIZE - 1) | |
ef0f3390 | 141 | |
506f275f | 142 | static unsigned int open_ownerid_hashval(const u32 id) |
ddc04c41 | 143 | { |
506f275f | 144 | return id & OPEN_OWNER_HASH_MASK; |
ddc04c41 BF |
145 | } |
146 | ||
506f275f | 147 | static unsigned int open_ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername) |
ddc04c41 BF |
148 | { |
149 | unsigned int ret; | |
150 | ||
151 | ret = opaque_hashval(ownername->data, ownername->len); | |
152 | ret += clientid; | |
506f275f | 153 | return ret & OPEN_OWNER_HASH_MASK; |
ddc04c41 | 154 | } |
ef0f3390 | 155 | |
506f275f BF |
156 | static struct list_head open_ownerid_hashtbl[OPEN_OWNER_HASH_SIZE]; |
157 | static struct list_head open_ownerstr_hashtbl[OPEN_OWNER_HASH_SIZE]; | |
ef0f3390 N |
158 | |
159 | /* hash table for nfs4_file */ | |
160 | #define FILE_HASH_BITS 8 | |
161 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
35079582 | 162 | |
ef0f3390 N |
163 | /* hash table for (open)nfs4_stateid */ |
164 | #define STATEID_HASH_BITS 10 | |
165 | #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS) | |
166 | #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1) | |
167 | ||
ddc04c41 BF |
168 | static unsigned int file_hashval(struct inode *ino) |
169 | { | |
170 | /* XXX: why are we hashing on inode pointer, anyway? */ | |
171 | return hash_ptr(ino, FILE_HASH_BITS); | |
172 | } | |
173 | ||
174 | static unsigned int stateid_hashval(u32 owner_id, u32 file_id) | |
175 | { | |
176 | return (owner_id + file_id) & STATEID_HASH_MASK; | |
177 | } | |
ef0f3390 N |
178 | |
179 | static struct list_head file_hashtbl[FILE_HASH_SIZE]; | |
180 | static struct list_head stateid_hashtbl[STATEID_HASH_SIZE]; | |
181 | ||
998db52c | 182 | static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
f9d7562f BF |
183 | { |
184 | BUG_ON(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR])); | |
185 | atomic_inc(&fp->fi_access[oflag]); | |
186 | } | |
187 | ||
998db52c BF |
188 | static void nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
189 | { | |
190 | if (oflag == O_RDWR) { | |
191 | __nfs4_file_get_access(fp, O_RDONLY); | |
192 | __nfs4_file_get_access(fp, O_WRONLY); | |
193 | } else | |
194 | __nfs4_file_get_access(fp, oflag); | |
195 | } | |
196 | ||
197 | static void nfs4_file_put_fd(struct nfs4_file *fp, int oflag) | |
f9d7562f BF |
198 | { |
199 | if (fp->fi_fds[oflag]) { | |
200 | fput(fp->fi_fds[oflag]); | |
201 | fp->fi_fds[oflag] = NULL; | |
202 | } | |
203 | } | |
204 | ||
998db52c | 205 | static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
f9d7562f BF |
206 | { |
207 | if (atomic_dec_and_test(&fp->fi_access[oflag])) { | |
208 | nfs4_file_put_fd(fp, O_RDWR); | |
209 | nfs4_file_put_fd(fp, oflag); | |
210 | } | |
211 | } | |
212 | ||
998db52c BF |
213 | static void nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
214 | { | |
215 | if (oflag == O_RDWR) { | |
216 | __nfs4_file_put_access(fp, O_RDONLY); | |
217 | __nfs4_file_put_access(fp, O_WRONLY); | |
218 | } else | |
219 | __nfs4_file_put_access(fp, oflag); | |
220 | } | |
221 | ||
1da177e4 LT |
222 | static struct nfs4_delegation * |
223 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type) | |
224 | { | |
225 | struct nfs4_delegation *dp; | |
226 | struct nfs4_file *fp = stp->st_file; | |
1da177e4 LT |
227 | |
228 | dprintk("NFSD alloc_init_deleg\n"); | |
c3e48080 BF |
229 | /* |
230 | * Major work on the lease subsystem (for example, to support | |
231 | * calbacks on stat) will be required before we can support | |
232 | * write delegations properly. | |
233 | */ | |
234 | if (type != NFS4_OPEN_DELEGATE_READ) | |
235 | return NULL; | |
47f9940c MS |
236 | if (fp->fi_had_conflict) |
237 | return NULL; | |
c2f1a551 | 238 | if (num_delegations > max_delegations) |
ef0f3390 | 239 | return NULL; |
5b2d21c1 N |
240 | dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); |
241 | if (dp == NULL) | |
1da177e4 | 242 | return dp; |
ef0f3390 | 243 | num_delegations++; |
ea1da636 N |
244 | INIT_LIST_HEAD(&dp->dl_perfile); |
245 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 LT |
246 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
247 | dp->dl_client = clp; | |
13cd2184 | 248 | get_nfs4_file(fp); |
1da177e4 | 249 | dp->dl_file = fp; |
1da177e4 | 250 | dp->dl_type = type; |
e4e83ea4 | 251 | dp->dl_stateid.si_boot = boot_time; |
1da177e4 LT |
252 | dp->dl_stateid.si_stateownerid = current_delegid++; |
253 | dp->dl_stateid.si_fileid = 0; | |
73997dc4 | 254 | dp->dl_stateid.si_generation = 1; |
6c02eaa1 | 255 | fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); |
1da177e4 LT |
256 | dp->dl_time = 0; |
257 | atomic_set(&dp->dl_count, 1); | |
b5a1a81e | 258 | INIT_WORK(&dp->dl_recall.cb_work, nfsd4_do_callback_rpc); |
1da177e4 LT |
259 | return dp; |
260 | } | |
261 | ||
262 | void | |
263 | nfs4_put_delegation(struct nfs4_delegation *dp) | |
264 | { | |
265 | if (atomic_dec_and_test(&dp->dl_count)) { | |
266 | dprintk("NFSD: freeing dp %p\n",dp); | |
13cd2184 | 267 | put_nfs4_file(dp->dl_file); |
5b2d21c1 | 268 | kmem_cache_free(deleg_slab, dp); |
ef0f3390 | 269 | num_delegations--; |
1da177e4 LT |
270 | } |
271 | } | |
272 | ||
acfdf5c3 | 273 | static void nfs4_put_deleg_lease(struct nfs4_file *fp) |
1da177e4 | 274 | { |
acfdf5c3 BF |
275 | if (atomic_dec_and_test(&fp->fi_delegees)) { |
276 | vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); | |
277 | fp->fi_lease = NULL; | |
4ee63624 | 278 | fput(fp->fi_deleg_file); |
acfdf5c3 BF |
279 | fp->fi_deleg_file = NULL; |
280 | } | |
1da177e4 LT |
281 | } |
282 | ||
283 | /* Called under the state lock. */ | |
284 | static void | |
285 | unhash_delegation(struct nfs4_delegation *dp) | |
286 | { | |
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 | |
384 | test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { | |
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 | ||
529d7b2a BF |
407 | static void unhash_generic_stateid(struct nfs4_stateid *stp) |
408 | { | |
409 | list_del(&stp->st_hash); | |
410 | list_del(&stp->st_perfile); | |
411 | list_del(&stp->st_perstateowner); | |
412 | } | |
413 | ||
414 | static void free_generic_stateid(struct nfs4_stateid *stp) | |
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)); | |
423 | } | |
23fcf2ec | 424 | } |
a96e5b90 | 425 | put_nfs4_file(stp->st_file); |
529d7b2a BF |
426 | kmem_cache_free(stateid_slab, stp); |
427 | } | |
428 | ||
429 | static void release_lock_stateid(struct nfs4_stateid *stp) | |
430 | { | |
431 | struct file *file; | |
432 | ||
433 | unhash_generic_stateid(stp); | |
434 | file = find_any_file(stp->st_file); | |
435 | if (file) | |
fe0750e5 | 436 | locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner)); |
529d7b2a BF |
437 | free_generic_stateid(stp); |
438 | } | |
439 | ||
fe0750e5 | 440 | static void unhash_lockowner(struct nfs4_lockowner *lo) |
529d7b2a BF |
441 | { |
442 | struct nfs4_stateid *stp; | |
443 | ||
fe0750e5 BF |
444 | list_del(&lo->lo_owner.so_idhash); |
445 | list_del(&lo->lo_owner.so_strhash); | |
446 | list_del(&lo->lo_perstateid); | |
447 | while (!list_empty(&lo->lo_owner.so_stateids)) { | |
448 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
529d7b2a BF |
449 | struct nfs4_stateid, st_perstateowner); |
450 | release_lock_stateid(stp); | |
451 | } | |
452 | } | |
453 | ||
fe0750e5 | 454 | static void release_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 455 | { |
fe0750e5 BF |
456 | unhash_lockowner(lo); |
457 | nfs4_free_lockowner(lo); | |
529d7b2a BF |
458 | } |
459 | ||
460 | static void | |
461 | release_stateid_lockowners(struct nfs4_stateid *open_stp) | |
462 | { | |
fe0750e5 | 463 | struct nfs4_lockowner *lo; |
529d7b2a BF |
464 | |
465 | while (!list_empty(&open_stp->st_lockowners)) { | |
fe0750e5 BF |
466 | lo = list_entry(open_stp->st_lockowners.next, |
467 | struct nfs4_lockowner, lo_perstateid); | |
468 | release_lockowner(lo); | |
529d7b2a BF |
469 | } |
470 | } | |
471 | ||
2283963f BF |
472 | static void release_open_stateid(struct nfs4_stateid *stp) |
473 | { | |
474 | unhash_generic_stateid(stp); | |
475 | release_stateid_lockowners(stp); | |
2283963f BF |
476 | free_generic_stateid(stp); |
477 | } | |
478 | ||
fe0750e5 | 479 | static void unhash_openowner(struct nfs4_openowner *oo) |
f1d110ca BF |
480 | { |
481 | struct nfs4_stateid *stp; | |
482 | ||
fe0750e5 BF |
483 | list_del(&oo->oo_owner.so_idhash); |
484 | list_del(&oo->oo_owner.so_strhash); | |
485 | list_del(&oo->oo_perclient); | |
486 | while (!list_empty(&oo->oo_owner.so_stateids)) { | |
487 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
f044ff83 BF |
488 | struct nfs4_stateid, st_perstateowner); |
489 | release_open_stateid(stp); | |
f1d110ca BF |
490 | } |
491 | } | |
492 | ||
fe0750e5 | 493 | static void release_openowner(struct nfs4_openowner *oo) |
f1d110ca | 494 | { |
fe0750e5 BF |
495 | unhash_openowner(oo); |
496 | list_del(&oo->oo_close_lru); | |
497 | nfs4_free_openowner(oo); | |
f1d110ca BF |
498 | } |
499 | ||
5282fd72 ME |
500 | #define SESSION_HASH_SIZE 512 |
501 | static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; | |
502 | ||
503 | static inline int | |
504 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
505 | { | |
506 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
507 | ||
508 | return sid->sequence % SESSION_HASH_SIZE; | |
509 | } | |
510 | ||
511 | static inline void | |
512 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
513 | { | |
514 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
515 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
516 | } | |
517 | ||
ec6b5d7b AA |
518 | static void |
519 | gen_sessionid(struct nfsd4_session *ses) | |
520 | { | |
521 | struct nfs4_client *clp = ses->se_client; | |
522 | struct nfsd4_sessionid *sid; | |
523 | ||
524 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
525 | sid->clientid = clp->cl_clientid; | |
526 | sid->sequence = current_sessionid++; | |
527 | sid->reserved = 0; | |
528 | } | |
529 | ||
530 | /* | |
a649637c AA |
531 | * The protocol defines ca_maxresponssize_cached to include the size of |
532 | * the rpc header, but all we need to cache is the data starting after | |
533 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
534 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
535 | * value that is the number of bytes in our cache plus a few additional | |
536 | * bytes. In order to stay on the safe side, and not promise more than | |
537 | * we can cache, those additional bytes must be the minimum possible: 24 | |
538 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
539 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
540 | * for the SEQUENCE op response: | |
541 | */ | |
542 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
543 | ||
557ce264 AA |
544 | static void |
545 | free_session_slots(struct nfsd4_session *ses) | |
546 | { | |
547 | int i; | |
548 | ||
549 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
550 | kfree(ses->se_slots[i]); | |
551 | } | |
552 | ||
a649637c | 553 | /* |
efe0cb6d BF |
554 | * We don't actually need to cache the rpc and session headers, so we |
555 | * can allocate a little less for each slot: | |
556 | */ | |
557 | static inline int slot_bytes(struct nfsd4_channel_attrs *ca) | |
558 | { | |
559 | return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
560 | } | |
561 | ||
5b6feee9 | 562 | static int nfsd4_sanitize_slot_size(u32 size) |
ec6b5d7b | 563 | { |
5b6feee9 BF |
564 | size -= NFSD_MIN_HDR_SEQ_SZ; /* We don't cache the rpc header */ |
565 | size = min_t(u32, size, NFSD_SLOT_CACHE_SIZE); | |
ec6b5d7b | 566 | |
5b6feee9 BF |
567 | return size; |
568 | } | |
ec6b5d7b | 569 | |
5b6feee9 BF |
570 | /* |
571 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c AA |
572 | * re-negotiate active sessions and reduce their slot usage to make |
573 | * rooom for new connections. For now we just fail the create session. | |
ec6b5d7b | 574 | */ |
5b6feee9 | 575 | static int nfsd4_get_drc_mem(int slotsize, u32 num) |
ec6b5d7b | 576 | { |
5b6feee9 | 577 | int avail; |
ec6b5d7b | 578 | |
5b6feee9 | 579 | num = min_t(u32, num, NFSD_MAX_SLOTS_PER_SESSION); |
5d77ddfb | 580 | |
5b6feee9 BF |
581 | spin_lock(&nfsd_drc_lock); |
582 | avail = min_t(int, NFSD_MAX_MEM_PER_SESSION, | |
583 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
584 | num = min_t(int, num, avail / slotsize); | |
585 | nfsd_drc_mem_used += num * slotsize; | |
586 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 587 | |
5b6feee9 BF |
588 | return num; |
589 | } | |
ec6b5d7b | 590 | |
5b6feee9 BF |
591 | static void nfsd4_put_drc_mem(int slotsize, int num) |
592 | { | |
4bd9b0f4 | 593 | spin_lock(&nfsd_drc_lock); |
5b6feee9 | 594 | nfsd_drc_mem_used -= slotsize * num; |
4bd9b0f4 | 595 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 596 | } |
ec6b5d7b | 597 | |
5b6feee9 BF |
598 | static struct nfsd4_session *alloc_session(int slotsize, int numslots) |
599 | { | |
600 | struct nfsd4_session *new; | |
601 | int mem, i; | |
a649637c | 602 | |
5b6feee9 BF |
603 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
604 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
605 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 606 | |
5b6feee9 BF |
607 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
608 | if (!new) | |
609 | return NULL; | |
557ce264 | 610 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 BF |
611 | for (i = 0; i < numslots; i++) { |
612 | mem = sizeof(struct nfsd4_slot) + slotsize; | |
613 | new->se_slots[i] = kzalloc(mem, GFP_KERNEL); | |
614 | if (!new->se_slots[i]) | |
557ce264 | 615 | goto out_free; |
557ce264 | 616 | } |
5b6feee9 BF |
617 | return new; |
618 | out_free: | |
619 | while (i--) | |
620 | kfree(new->se_slots[i]); | |
621 | kfree(new); | |
622 | return NULL; | |
ec6b5d7b AA |
623 | } |
624 | ||
5b6feee9 | 625 | static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, struct nfsd4_channel_attrs *req, int numslots, int slotsize) |
ec6b5d7b | 626 | { |
5b6feee9 | 627 | u32 maxrpc = nfsd_serv->sv_max_mesg; |
ec6b5d7b | 628 | |
5b6feee9 | 629 | new->maxreqs = numslots; |
d2b21743 MJ |
630 | new->maxresp_cached = min_t(u32, req->maxresp_cached, |
631 | slotsize + NFSD_MIN_HDR_SEQ_SZ); | |
5b6feee9 BF |
632 | new->maxreq_sz = min_t(u32, req->maxreq_sz, maxrpc); |
633 | new->maxresp_sz = min_t(u32, req->maxresp_sz, maxrpc); | |
634 | new->maxops = min_t(u32, req->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
635 | } | |
ec6b5d7b | 636 | |
19cf5c02 BF |
637 | static void free_conn(struct nfsd4_conn *c) |
638 | { | |
639 | svc_xprt_put(c->cn_xprt); | |
640 | kfree(c); | |
641 | } | |
ec6b5d7b | 642 | |
19cf5c02 BF |
643 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
644 | { | |
645 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
646 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 647 | |
19cf5c02 BF |
648 | spin_lock(&clp->cl_lock); |
649 | if (!list_empty(&c->cn_persession)) { | |
650 | list_del(&c->cn_persession); | |
651 | free_conn(c); | |
652 | } | |
653 | spin_unlock(&clp->cl_lock); | |
eea49806 | 654 | nfsd4_probe_callback(clp); |
19cf5c02 | 655 | } |
ec6b5d7b | 656 | |
d29c374c | 657 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 658 | { |
c7662518 | 659 | struct nfsd4_conn *conn; |
ec6b5d7b | 660 | |
c7662518 BF |
661 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
662 | if (!conn) | |
db90681d | 663 | return NULL; |
c7662518 BF |
664 | svc_xprt_get(rqstp->rq_xprt); |
665 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 666 | conn->cn_flags = flags; |
db90681d BF |
667 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
668 | return conn; | |
669 | } | |
a649637c | 670 | |
328ead28 BF |
671 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
672 | { | |
673 | conn->cn_session = ses; | |
674 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
675 | } |
676 | ||
db90681d | 677 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 678 | { |
db90681d | 679 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 680 | |
c7662518 | 681 | spin_lock(&clp->cl_lock); |
328ead28 | 682 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 683 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
684 | } |
685 | ||
21b75b01 | 686 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 687 | { |
19cf5c02 | 688 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 689 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
690 | } |
691 | ||
1d1bc8f2 | 692 | static __be32 nfsd4_new_conn(struct svc_rqst *rqstp, struct nfsd4_session *ses, u32 dir) |
ec6b5d7b | 693 | { |
db90681d | 694 | struct nfsd4_conn *conn; |
21b75b01 | 695 | int ret; |
ec6b5d7b | 696 | |
1d1bc8f2 | 697 | conn = alloc_conn(rqstp, dir); |
db90681d BF |
698 | if (!conn) |
699 | return nfserr_jukebox; | |
700 | nfsd4_hash_conn(conn, ses); | |
21b75b01 BF |
701 | ret = nfsd4_register_conn(conn); |
702 | if (ret) | |
703 | /* oops; xprt is already down: */ | |
704 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
c7662518 BF |
705 | return nfs_ok; |
706 | } | |
ec6b5d7b | 707 | |
1d1bc8f2 BF |
708 | static __be32 nfsd4_new_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_session *ses) |
709 | { | |
710 | u32 dir = NFS4_CDFC4_FORE; | |
711 | ||
712 | if (ses->se_flags & SESSION4_BACK_CHAN) | |
713 | dir |= NFS4_CDFC4_BACK; | |
714 | ||
715 | return nfsd4_new_conn(rqstp, ses, dir); | |
716 | } | |
717 | ||
718 | /* must be called under client_lock */ | |
19cf5c02 | 719 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 720 | { |
19cf5c02 BF |
721 | struct nfs4_client *clp = s->se_client; |
722 | struct nfsd4_conn *c; | |
ec6b5d7b | 723 | |
19cf5c02 BF |
724 | spin_lock(&clp->cl_lock); |
725 | while (!list_empty(&s->se_conns)) { | |
726 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
727 | list_del_init(&c->cn_persession); | |
728 | spin_unlock(&clp->cl_lock); | |
557ce264 | 729 | |
19cf5c02 BF |
730 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
731 | free_conn(c); | |
ec6b5d7b | 732 | |
19cf5c02 BF |
733 | spin_lock(&clp->cl_lock); |
734 | } | |
735 | spin_unlock(&clp->cl_lock); | |
c7662518 | 736 | } |
ec6b5d7b | 737 | |
c7662518 BF |
738 | void free_session(struct kref *kref) |
739 | { | |
740 | struct nfsd4_session *ses; | |
741 | int mem; | |
742 | ||
743 | ses = container_of(kref, struct nfsd4_session, se_ref); | |
19cf5c02 | 744 | nfsd4_del_conns(ses); |
c7662518 BF |
745 | spin_lock(&nfsd_drc_lock); |
746 | mem = ses->se_fchannel.maxreqs * slot_bytes(&ses->se_fchannel); | |
747 | nfsd_drc_mem_used -= mem; | |
748 | spin_unlock(&nfsd_drc_lock); | |
749 | free_session_slots(ses); | |
750 | kfree(ses); | |
751 | } | |
752 | ||
ac7c46f2 | 753 | static struct nfsd4_session *alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
5b6feee9 BF |
754 | { |
755 | struct nfsd4_session *new; | |
756 | struct nfsd4_channel_attrs *fchan = &cses->fore_channel; | |
757 | int numslots, slotsize; | |
c7662518 | 758 | int status; |
5b6feee9 BF |
759 | int idx; |
760 | ||
761 | /* | |
762 | * Note decreasing slot size below client's request may | |
763 | * make it difficult for client to function correctly, whereas | |
764 | * decreasing the number of slots will (just?) affect | |
765 | * performance. When short on memory we therefore prefer to | |
766 | * decrease number of slots instead of their size. | |
767 | */ | |
768 | slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached); | |
769 | numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs); | |
ced6dfe9 MJ |
770 | if (numslots < 1) |
771 | return NULL; | |
5b6feee9 BF |
772 | |
773 | new = alloc_session(slotsize, numslots); | |
774 | if (!new) { | |
775 | nfsd4_put_drc_mem(slotsize, fchan->maxreqs); | |
ac7c46f2 | 776 | return NULL; |
557ce264 | 777 | } |
5b6feee9 | 778 | init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize); |
557ce264 | 779 | |
ec6b5d7b AA |
780 | new->se_client = clp; |
781 | gen_sessionid(new); | |
ec6b5d7b | 782 | |
c7662518 BF |
783 | INIT_LIST_HEAD(&new->se_conns); |
784 | ||
ac7c46f2 | 785 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 786 | new->se_flags = cses->flags; |
8b5ce5cd | 787 | new->se_cb_prog = cses->callback_prog; |
ec6b5d7b | 788 | kref_init(&new->se_ref); |
5b6feee9 | 789 | idx = hash_sessionid(&new->se_sessionid); |
9089f1b4 | 790 | spin_lock(&client_lock); |
ec6b5d7b | 791 | list_add(&new->se_hash, &sessionid_hashtbl[idx]); |
4c649378 | 792 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 793 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 794 | spin_unlock(&clp->cl_lock); |
9089f1b4 | 795 | spin_unlock(&client_lock); |
ec6b5d7b | 796 | |
1d1bc8f2 | 797 | status = nfsd4_new_conn_from_crses(rqstp, new); |
ac7c46f2 | 798 | /* whoops: benny points out, status is ignored! (err, or bogus) */ |
c7662518 BF |
799 | if (status) { |
800 | free_session(&new->se_ref); | |
ac7c46f2 | 801 | return NULL; |
c7662518 | 802 | } |
dcbeaa68 | 803 | if (cses->flags & SESSION4_BACK_CHAN) { |
edd76786 | 804 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
805 | /* |
806 | * This is a little silly; with sessions there's no real | |
807 | * use for the callback address. Use the peer address | |
808 | * as a reasonable default for now, but consider fixing | |
809 | * the rpc client not to require an address in the | |
810 | * future: | |
811 | */ | |
edd76786 BF |
812 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
813 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 814 | } |
dcbeaa68 | 815 | nfsd4_probe_callback(clp); |
ac7c46f2 | 816 | return new; |
ec6b5d7b AA |
817 | } |
818 | ||
9089f1b4 | 819 | /* caller must hold client_lock */ |
5282fd72 ME |
820 | static struct nfsd4_session * |
821 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) | |
822 | { | |
823 | struct nfsd4_session *elem; | |
824 | int idx; | |
825 | ||
826 | dump_sessionid(__func__, sessionid); | |
827 | idx = hash_sessionid(sessionid); | |
5282fd72 ME |
828 | /* Search in the appropriate list */ |
829 | list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { | |
5282fd72 ME |
830 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
831 | NFS4_MAX_SESSIONID_LEN)) { | |
832 | return elem; | |
833 | } | |
834 | } | |
835 | ||
836 | dprintk("%s: session not found\n", __func__); | |
837 | return NULL; | |
838 | } | |
839 | ||
9089f1b4 | 840 | /* caller must hold client_lock */ |
7116ed6b | 841 | static void |
5282fd72 | 842 | unhash_session(struct nfsd4_session *ses) |
7116ed6b AA |
843 | { |
844 | list_del(&ses->se_hash); | |
4c649378 | 845 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 846 | list_del(&ses->se_perclnt); |
4c649378 | 847 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
848 | } |
849 | ||
36acb66b | 850 | /* must be called under the client_lock */ |
1da177e4 | 851 | static inline void |
36acb66b | 852 | renew_client_locked(struct nfs4_client *clp) |
1da177e4 | 853 | { |
07cd4909 BH |
854 | if (is_client_expired(clp)) { |
855 | dprintk("%s: client (clientid %08x/%08x) already expired\n", | |
856 | __func__, | |
857 | clp->cl_clientid.cl_boot, | |
858 | clp->cl_clientid.cl_id); | |
859 | return; | |
860 | } | |
861 | ||
1da177e4 LT |
862 | /* |
863 | * Move client to the end to the LRU list. | |
864 | */ | |
865 | dprintk("renewing client (clientid %08x/%08x)\n", | |
866 | clp->cl_clientid.cl_boot, | |
867 | clp->cl_clientid.cl_id); | |
868 | list_move_tail(&clp->cl_lru, &client_lru); | |
869 | clp->cl_time = get_seconds(); | |
870 | } | |
871 | ||
36acb66b BH |
872 | static inline void |
873 | renew_client(struct nfs4_client *clp) | |
874 | { | |
875 | spin_lock(&client_lock); | |
876 | renew_client_locked(clp); | |
877 | spin_unlock(&client_lock); | |
878 | } | |
879 | ||
1da177e4 LT |
880 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
881 | static int | |
882 | STALE_CLIENTID(clientid_t *clid) | |
883 | { | |
884 | if (clid->cl_boot == boot_time) | |
885 | return 0; | |
60adfc50 AA |
886 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
887 | clid->cl_boot, clid->cl_id, boot_time); | |
1da177e4 LT |
888 | return 1; |
889 | } | |
890 | ||
891 | /* | |
892 | * XXX Should we use a slab cache ? | |
893 | * This type of memory management is somewhat inefficient, but we use it | |
894 | * anyway since SETCLIENTID is not a common operation. | |
895 | */ | |
35bba9a3 | 896 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
897 | { |
898 | struct nfs4_client *clp; | |
899 | ||
35bba9a3 BF |
900 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
901 | if (clp == NULL) | |
902 | return NULL; | |
903 | clp->cl_name.data = kmalloc(name.len, GFP_KERNEL); | |
904 | if (clp->cl_name.data == NULL) { | |
905 | kfree(clp); | |
906 | return NULL; | |
1da177e4 | 907 | } |
35bba9a3 BF |
908 | memcpy(clp->cl_name.data, name.data, name.len); |
909 | clp->cl_name.len = name.len; | |
1da177e4 LT |
910 | return clp; |
911 | } | |
912 | ||
913 | static inline void | |
914 | free_client(struct nfs4_client *clp) | |
915 | { | |
792c95dd BF |
916 | while (!list_empty(&clp->cl_sessions)) { |
917 | struct nfsd4_session *ses; | |
918 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
919 | se_perclnt); | |
920 | list_del(&ses->se_perclnt); | |
921 | nfsd4_put_session(ses); | |
922 | } | |
1da177e4 LT |
923 | if (clp->cl_cred.cr_group_info) |
924 | put_group_info(clp->cl_cred.cr_group_info); | |
68e76ad0 | 925 | kfree(clp->cl_principal); |
1da177e4 LT |
926 | kfree(clp->cl_name.data); |
927 | kfree(clp); | |
928 | } | |
929 | ||
d7682988 BH |
930 | void |
931 | release_session_client(struct nfsd4_session *session) | |
932 | { | |
933 | struct nfs4_client *clp = session->se_client; | |
934 | ||
935 | if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock)) | |
936 | return; | |
937 | if (is_client_expired(clp)) { | |
938 | free_client(clp); | |
939 | session->se_client = NULL; | |
940 | } else | |
941 | renew_client_locked(clp); | |
942 | spin_unlock(&client_lock); | |
d7682988 BH |
943 | } |
944 | ||
84d38ac9 BH |
945 | /* must be called under the client_lock */ |
946 | static inline void | |
947 | unhash_client_locked(struct nfs4_client *clp) | |
948 | { | |
792c95dd BF |
949 | struct nfsd4_session *ses; |
950 | ||
07cd4909 | 951 | mark_client_expired(clp); |
84d38ac9 | 952 | list_del(&clp->cl_lru); |
4c649378 | 953 | spin_lock(&clp->cl_lock); |
792c95dd BF |
954 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
955 | list_del_init(&ses->se_hash); | |
4c649378 | 956 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
957 | } |
958 | ||
1da177e4 LT |
959 | static void |
960 | expire_client(struct nfs4_client *clp) | |
961 | { | |
fe0750e5 | 962 | struct nfs4_openowner *oo; |
1da177e4 | 963 | struct nfs4_delegation *dp; |
1da177e4 LT |
964 | struct list_head reaplist; |
965 | ||
1da177e4 LT |
966 | INIT_LIST_HEAD(&reaplist); |
967 | spin_lock(&recall_lock); | |
ea1da636 N |
968 | while (!list_empty(&clp->cl_delegations)) { |
969 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
ea1da636 | 970 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
971 | list_move(&dp->dl_recall_lru, &reaplist); |
972 | } | |
973 | spin_unlock(&recall_lock); | |
974 | while (!list_empty(&reaplist)) { | |
975 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
976 | list_del_init(&dp->dl_recall_lru); | |
977 | unhash_delegation(dp); | |
978 | } | |
ea1da636 | 979 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 BF |
980 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
981 | release_openowner(oo); | |
1da177e4 | 982 | } |
6ff8da08 | 983 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
984 | if (clp->cl_cb_conn.cb_xprt) |
985 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
36acb66b BH |
986 | list_del(&clp->cl_idhash); |
987 | list_del(&clp->cl_strhash); | |
be1fdf6c | 988 | spin_lock(&client_lock); |
84d38ac9 | 989 | unhash_client_locked(clp); |
46583e25 BH |
990 | if (atomic_read(&clp->cl_refcount) == 0) |
991 | free_client(clp); | |
be1fdf6c | 992 | spin_unlock(&client_lock); |
1da177e4 LT |
993 | } |
994 | ||
35bba9a3 BF |
995 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
996 | { | |
997 | memcpy(target->cl_verifier.data, source->data, | |
998 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
999 | } |
1000 | ||
35bba9a3 BF |
1001 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
1002 | { | |
1da177e4 LT |
1003 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
1004 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
1005 | } | |
1006 | ||
35bba9a3 BF |
1007 | static void copy_cred(struct svc_cred *target, struct svc_cred *source) |
1008 | { | |
1da177e4 LT |
1009 | target->cr_uid = source->cr_uid; |
1010 | target->cr_gid = source->cr_gid; | |
1011 | target->cr_group_info = source->cr_group_info; | |
1012 | get_group_info(target->cr_group_info); | |
1013 | } | |
1014 | ||
35bba9a3 | 1015 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 1016 | { |
a55370a3 | 1017 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
1018 | } |
1019 | ||
1020 | static int | |
599e0a22 BF |
1021 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1022 | { | |
1023 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
1024 | } |
1025 | ||
1026 | static int | |
599e0a22 BF |
1027 | same_clid(clientid_t *cl1, clientid_t *cl2) |
1028 | { | |
1029 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1030 | } |
1031 | ||
1032 | /* XXX what about NGROUP */ | |
1033 | static int | |
599e0a22 BF |
1034 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
1035 | { | |
1036 | return cr1->cr_uid == cr2->cr_uid; | |
1da177e4 LT |
1037 | } |
1038 | ||
5ec7b46c BF |
1039 | static void gen_clid(struct nfs4_client *clp) |
1040 | { | |
1041 | static u32 current_clientid = 1; | |
1042 | ||
1da177e4 LT |
1043 | clp->cl_clientid.cl_boot = boot_time; |
1044 | clp->cl_clientid.cl_id = current_clientid++; | |
1045 | } | |
1046 | ||
deda2faa BF |
1047 | static void gen_confirm(struct nfs4_client *clp) |
1048 | { | |
1049 | static u32 i; | |
1050 | u32 *p; | |
1da177e4 | 1051 | |
1da177e4 | 1052 | p = (u32 *)clp->cl_confirm.data; |
deda2faa BF |
1053 | *p++ = get_seconds(); |
1054 | *p++ = i++; | |
1da177e4 LT |
1055 | } |
1056 | ||
b09333c4 RL |
1057 | static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, |
1058 | struct svc_rqst *rqstp, nfs4_verifier *verf) | |
1059 | { | |
1060 | struct nfs4_client *clp; | |
1061 | struct sockaddr *sa = svc_addr(rqstp); | |
1062 | char *princ; | |
1063 | ||
1064 | clp = alloc_client(name); | |
1065 | if (clp == NULL) | |
1066 | return NULL; | |
1067 | ||
792c95dd BF |
1068 | INIT_LIST_HEAD(&clp->cl_sessions); |
1069 | ||
b09333c4 RL |
1070 | princ = svc_gss_principal(rqstp); |
1071 | if (princ) { | |
1072 | clp->cl_principal = kstrdup(princ, GFP_KERNEL); | |
1073 | if (clp->cl_principal == NULL) { | |
1074 | free_client(clp); | |
1075 | return NULL; | |
1076 | } | |
1077 | } | |
1078 | ||
1079 | memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); | |
46583e25 | 1080 | atomic_set(&clp->cl_refcount, 0); |
77a3569d | 1081 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; |
b09333c4 RL |
1082 | INIT_LIST_HEAD(&clp->cl_idhash); |
1083 | INIT_LIST_HEAD(&clp->cl_strhash); | |
1084 | INIT_LIST_HEAD(&clp->cl_openowners); | |
1085 | INIT_LIST_HEAD(&clp->cl_delegations); | |
b09333c4 | 1086 | INIT_LIST_HEAD(&clp->cl_lru); |
5ce8ba25 | 1087 | INIT_LIST_HEAD(&clp->cl_callbacks); |
6ff8da08 | 1088 | spin_lock_init(&clp->cl_lock); |
cee277d9 | 1089 | INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_do_callback_rpc); |
07cd4909 | 1090 | clp->cl_time = get_seconds(); |
b09333c4 RL |
1091 | clear_bit(0, &clp->cl_cb_slot_busy); |
1092 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1093 | copy_verf(clp, verf); | |
1094 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
1095 | clp->cl_flavor = rqstp->rq_flavor; | |
1096 | copy_cred(&clp->cl_cred, &rqstp->rq_cred); | |
1097 | gen_confirm(clp); | |
edd76786 | 1098 | clp->cl_cb_session = NULL; |
b09333c4 RL |
1099 | return clp; |
1100 | } | |
1101 | ||
35bba9a3 BF |
1102 | static int check_name(struct xdr_netobj name) |
1103 | { | |
1da177e4 LT |
1104 | if (name.len == 0) |
1105 | return 0; | |
1106 | if (name.len > NFS4_OPAQUE_LIMIT) { | |
2fdada03 | 1107 | dprintk("NFSD: check_name: name too long(%d)!\n", name.len); |
1da177e4 LT |
1108 | return 0; |
1109 | } | |
1110 | return 1; | |
1111 | } | |
1112 | ||
fd39ca9a | 1113 | static void |
1da177e4 LT |
1114 | add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) |
1115 | { | |
1116 | unsigned int idhashval; | |
1117 | ||
1118 | list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); | |
1119 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
1120 | list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); | |
36acb66b | 1121 | renew_client(clp); |
1da177e4 LT |
1122 | } |
1123 | ||
fd39ca9a | 1124 | static void |
1da177e4 LT |
1125 | move_to_confirmed(struct nfs4_client *clp) |
1126 | { | |
1127 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
1128 | unsigned int strhashval; | |
1129 | ||
1130 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
f116629d | 1131 | list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); |
a55370a3 | 1132 | strhashval = clientstr_hashval(clp->cl_recdir); |
328efbab | 1133 | list_move(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); |
1da177e4 LT |
1134 | renew_client(clp); |
1135 | } | |
1136 | ||
1137 | static struct nfs4_client * | |
1138 | find_confirmed_client(clientid_t *clid) | |
1139 | { | |
1140 | struct nfs4_client *clp; | |
1141 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1142 | ||
1143 | list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 1144 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
1145 | return clp; |
1146 | } | |
1147 | return NULL; | |
1148 | } | |
1149 | ||
1150 | static struct nfs4_client * | |
1151 | find_unconfirmed_client(clientid_t *clid) | |
1152 | { | |
1153 | struct nfs4_client *clp; | |
1154 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1155 | ||
1156 | list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 1157 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
1158 | return clp; |
1159 | } | |
1160 | return NULL; | |
1161 | } | |
1162 | ||
6e5f15c9 | 1163 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 1164 | { |
6e5f15c9 | 1165 | return clp->cl_exchange_flags != 0; |
e203d506 | 1166 | } |
a1bcecd2 | 1167 | |
28ce6054 | 1168 | static struct nfs4_client * |
e203d506 | 1169 | find_confirmed_client_by_str(const char *dname, unsigned int hashval) |
28ce6054 N |
1170 | { |
1171 | struct nfs4_client *clp; | |
1172 | ||
1173 | list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { | |
e203d506 | 1174 | if (same_name(clp->cl_recdir, dname)) |
28ce6054 N |
1175 | return clp; |
1176 | } | |
1177 | return NULL; | |
1178 | } | |
1179 | ||
1180 | static struct nfs4_client * | |
e203d506 | 1181 | find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) |
28ce6054 N |
1182 | { |
1183 | struct nfs4_client *clp; | |
1184 | ||
1185 | list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { | |
e203d506 | 1186 | if (same_name(clp->cl_recdir, dname)) |
28ce6054 N |
1187 | return clp; |
1188 | } | |
1189 | return NULL; | |
1190 | } | |
1191 | ||
6f3d772f TU |
1192 | static void rpc_svcaddr2sockaddr(struct sockaddr *sa, unsigned short family, union svc_addr_u *svcaddr) |
1193 | { | |
1194 | switch (family) { | |
1195 | case AF_INET: | |
1196 | ((struct sockaddr_in *)sa)->sin_family = AF_INET; | |
1197 | ((struct sockaddr_in *)sa)->sin_addr = svcaddr->addr; | |
1198 | return; | |
1199 | case AF_INET6: | |
1200 | ((struct sockaddr_in6 *)sa)->sin6_family = AF_INET6; | |
1201 | ((struct sockaddr_in6 *)sa)->sin6_addr = svcaddr->addr6; | |
1202 | return; | |
1203 | } | |
1204 | } | |
1205 | ||
fd39ca9a | 1206 | static void |
6f3d772f | 1207 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 1208 | { |
07263f1e | 1209 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
1210 | struct sockaddr *sa = svc_addr(rqstp); |
1211 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
1212 | unsigned short expected_family; |
1213 | ||
1214 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
1215 | if (se->se_callback_netid_len == 3 && | |
1216 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
1217 | expected_family = AF_INET; | |
1218 | else if (se->se_callback_netid_len == 4 && | |
1219 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
1220 | expected_family = AF_INET6; | |
1221 | else | |
1da177e4 LT |
1222 | goto out_err; |
1223 | ||
07263f1e | 1224 | conn->cb_addrlen = rpc_uaddr2sockaddr(se->se_callback_addr_val, |
aa9a4ec7 | 1225 | se->se_callback_addr_len, |
07263f1e BF |
1226 | (struct sockaddr *)&conn->cb_addr, |
1227 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 1228 | |
07263f1e | 1229 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 1230 | goto out_err; |
aa9a4ec7 | 1231 | |
07263f1e BF |
1232 | if (conn->cb_addr.ss_family == AF_INET6) |
1233 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 1234 | |
07263f1e BF |
1235 | conn->cb_prog = se->se_callback_prog; |
1236 | conn->cb_ident = se->se_callback_ident; | |
6f3d772f | 1237 | rpc_svcaddr2sockaddr((struct sockaddr *)&conn->cb_saddr, expected_family, &rqstp->rq_daddr); |
1da177e4 LT |
1238 | return; |
1239 | out_err: | |
07263f1e BF |
1240 | conn->cb_addr.ss_family = AF_UNSPEC; |
1241 | conn->cb_addrlen = 0; | |
849823c5 | 1242 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
1243 | "will not receive delegations\n", |
1244 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
1245 | ||
1da177e4 LT |
1246 | return; |
1247 | } | |
1248 | ||
074fe897 | 1249 | /* |
557ce264 | 1250 | * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. |
074fe897 | 1251 | */ |
074fe897 AA |
1252 | void |
1253 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) | |
074fe897 | 1254 | { |
557ce264 AA |
1255 | struct nfsd4_slot *slot = resp->cstate.slot; |
1256 | unsigned int base; | |
074fe897 | 1257 | |
557ce264 | 1258 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1259 | |
557ce264 AA |
1260 | slot->sl_opcnt = resp->opcnt; |
1261 | slot->sl_status = resp->cstate.status; | |
074fe897 | 1262 | |
bf864a31 | 1263 | if (nfsd4_not_cached(resp)) { |
557ce264 | 1264 | slot->sl_datalen = 0; |
bf864a31 | 1265 | return; |
074fe897 | 1266 | } |
557ce264 AA |
1267 | slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; |
1268 | base = (char *)resp->cstate.datap - | |
1269 | (char *)resp->xbuf->head[0].iov_base; | |
1270 | if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, | |
1271 | slot->sl_datalen)) | |
1272 | WARN("%s: sessions DRC could not cache compound\n", __func__); | |
1273 | return; | |
074fe897 AA |
1274 | } |
1275 | ||
1276 | /* | |
abfabf8c AA |
1277 | * Encode the replay sequence operation from the slot values. |
1278 | * If cachethis is FALSE encode the uncached rep error on the next | |
1279 | * operation which sets resp->p and increments resp->opcnt for | |
1280 | * nfs4svc_encode_compoundres. | |
074fe897 | 1281 | * |
074fe897 | 1282 | */ |
abfabf8c AA |
1283 | static __be32 |
1284 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
1285 | struct nfsd4_compoundres *resp) | |
074fe897 | 1286 | { |
abfabf8c AA |
1287 | struct nfsd4_op *op; |
1288 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 1289 | |
abfabf8c | 1290 | dprintk("--> %s resp->opcnt %d cachethis %u \n", __func__, |
557ce264 | 1291 | resp->opcnt, resp->cstate.slot->sl_cachethis); |
bf864a31 | 1292 | |
abfabf8c AA |
1293 | /* Encode the replayed sequence operation */ |
1294 | op = &args->ops[resp->opcnt - 1]; | |
1295 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 1296 | |
abfabf8c | 1297 | /* Return nfserr_retry_uncached_rep in next operation. */ |
557ce264 | 1298 | if (args->opcnt > 1 && slot->sl_cachethis == 0) { |
abfabf8c AA |
1299 | op = &args->ops[resp->opcnt++]; |
1300 | op->status = nfserr_retry_uncached_rep; | |
1301 | nfsd4_encode_operation(resp, op); | |
074fe897 | 1302 | } |
abfabf8c | 1303 | return op->status; |
074fe897 AA |
1304 | } |
1305 | ||
1306 | /* | |
557ce264 AA |
1307 | * The sequence operation is not cached because we can use the slot and |
1308 | * session values. | |
074fe897 AA |
1309 | */ |
1310 | __be32 | |
bf864a31 AA |
1311 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
1312 | struct nfsd4_sequence *seq) | |
074fe897 | 1313 | { |
557ce264 | 1314 | struct nfsd4_slot *slot = resp->cstate.slot; |
074fe897 AA |
1315 | __be32 status; |
1316 | ||
557ce264 | 1317 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1318 | |
abfabf8c AA |
1319 | /* Either returns 0 or nfserr_retry_uncached */ |
1320 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); | |
1321 | if (status == nfserr_retry_uncached_rep) | |
1322 | return status; | |
074fe897 | 1323 | |
557ce264 AA |
1324 | /* The sequence operation has been encoded, cstate->datap set. */ |
1325 | memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); | |
074fe897 | 1326 | |
557ce264 AA |
1327 | resp->opcnt = slot->sl_opcnt; |
1328 | resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); | |
1329 | status = slot->sl_status; | |
074fe897 AA |
1330 | |
1331 | return status; | |
1332 | } | |
1333 | ||
0733d213 AA |
1334 | /* |
1335 | * Set the exchange_id flags returned by the server. | |
1336 | */ | |
1337 | static void | |
1338 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
1339 | { | |
1340 | /* pNFS is not supported */ | |
1341 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
1342 | ||
1343 | /* Referrals are supported, Migration is not. */ | |
1344 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
1345 | ||
1346 | /* set the wire flags to return to client. */ | |
1347 | clid->flags = new->cl_exchange_flags; | |
1348 | } | |
1349 | ||
069b6ad4 AA |
1350 | __be32 |
1351 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
1352 | struct nfsd4_compound_state *cstate, | |
1353 | struct nfsd4_exchange_id *exid) | |
1354 | { | |
0733d213 AA |
1355 | struct nfs4_client *unconf, *conf, *new; |
1356 | int status; | |
1357 | unsigned int strhashval; | |
1358 | char dname[HEXDIR_LEN]; | |
363168b4 | 1359 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 1360 | nfs4_verifier verf = exid->verifier; |
363168b4 | 1361 | struct sockaddr *sa = svc_addr(rqstp); |
0733d213 | 1362 | |
363168b4 | 1363 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 1364 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 1365 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 1366 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 1367 | addr_str, exid->flags, exid->spa_how); |
0733d213 AA |
1368 | |
1369 | if (!check_name(exid->clname) || (exid->flags & ~EXCHGID4_FLAG_MASK_A)) | |
1370 | return nfserr_inval; | |
1371 | ||
1372 | /* Currently only support SP4_NONE */ | |
1373 | switch (exid->spa_how) { | |
1374 | case SP4_NONE: | |
1375 | break; | |
1376 | case SP4_SSV: | |
044bc1d4 | 1377 | return nfserr_serverfault; |
0733d213 AA |
1378 | default: |
1379 | BUG(); /* checked by xdr code */ | |
1380 | case SP4_MACH_CRED: | |
1381 | return nfserr_serverfault; /* no excuse :-/ */ | |
1382 | } | |
1383 | ||
1384 | status = nfs4_make_rec_clidname(dname, &exid->clname); | |
1385 | ||
1386 | if (status) | |
1387 | goto error; | |
1388 | ||
1389 | strhashval = clientstr_hashval(dname); | |
1390 | ||
1391 | nfs4_lock_state(); | |
1392 | status = nfs_ok; | |
1393 | ||
e203d506 | 1394 | conf = find_confirmed_client_by_str(dname, strhashval); |
0733d213 | 1395 | if (conf) { |
e203d506 BF |
1396 | if (!clp_used_exchangeid(conf)) { |
1397 | status = nfserr_clid_inuse; /* XXX: ? */ | |
1398 | goto out; | |
1399 | } | |
0733d213 AA |
1400 | if (!same_verf(&verf, &conf->cl_verifier)) { |
1401 | /* 18.35.4 case 8 */ | |
1402 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1403 | status = nfserr_not_same; | |
1404 | goto out; | |
1405 | } | |
1406 | /* Client reboot: destroy old state */ | |
1407 | expire_client(conf); | |
1408 | goto out_new; | |
1409 | } | |
1410 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { | |
1411 | /* 18.35.4 case 9 */ | |
1412 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1413 | status = nfserr_perm; | |
1414 | goto out; | |
1415 | } | |
1416 | expire_client(conf); | |
1417 | goto out_new; | |
1418 | } | |
0733d213 AA |
1419 | /* |
1420 | * Set bit when the owner id and verifier map to an already | |
1421 | * confirmed client id (18.35.3). | |
1422 | */ | |
1423 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
1424 | ||
1425 | /* | |
1426 | * Falling into 18.35.4 case 2, possible router replay. | |
1427 | * Leave confirmed record intact and return same result. | |
1428 | */ | |
1429 | copy_verf(conf, &verf); | |
1430 | new = conf; | |
1431 | goto out_copy; | |
6ddbbbfe MS |
1432 | } |
1433 | ||
1434 | /* 18.35.4 case 7 */ | |
1435 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1436 | status = nfserr_noent; | |
1437 | goto out; | |
0733d213 AA |
1438 | } |
1439 | ||
e203d506 | 1440 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
0733d213 AA |
1441 | if (unconf) { |
1442 | /* | |
1443 | * Possible retry or client restart. Per 18.35.4 case 4, | |
1444 | * a new unconfirmed record should be generated regardless | |
1445 | * of whether any properties have changed. | |
1446 | */ | |
1447 | expire_client(unconf); | |
1448 | } | |
1449 | ||
1450 | out_new: | |
1451 | /* Normal case */ | |
b09333c4 | 1452 | new = create_client(exid->clname, dname, rqstp, &verf); |
0733d213 | 1453 | if (new == NULL) { |
4731030d | 1454 | status = nfserr_jukebox; |
0733d213 AA |
1455 | goto out; |
1456 | } | |
1457 | ||
0733d213 | 1458 | gen_clid(new); |
0733d213 AA |
1459 | add_to_unconfirmed(new, strhashval); |
1460 | out_copy: | |
1461 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
1462 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
1463 | ||
38eb76a5 | 1464 | exid->seqid = 1; |
0733d213 AA |
1465 | nfsd4_set_ex_flags(new, exid); |
1466 | ||
1467 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
49557cc7 | 1468 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
1469 | status = nfs_ok; |
1470 | ||
1471 | out: | |
1472 | nfs4_unlock_state(); | |
1473 | error: | |
1474 | dprintk("nfsd4_exchange_id returns %d\n", ntohl(status)); | |
1475 | return status; | |
069b6ad4 AA |
1476 | } |
1477 | ||
b85d4c01 | 1478 | static int |
88e588d5 | 1479 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 1480 | { |
88e588d5 AA |
1481 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
1482 | slot_seqid); | |
b85d4c01 BH |
1483 | |
1484 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
1485 | if (slot_inuse) { |
1486 | if (seqid == slot_seqid) | |
b85d4c01 BH |
1487 | return nfserr_jukebox; |
1488 | else | |
1489 | return nfserr_seq_misordered; | |
1490 | } | |
1491 | /* Normal */ | |
88e588d5 | 1492 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 BH |
1493 | return nfs_ok; |
1494 | /* Replay */ | |
88e588d5 | 1495 | if (seqid == slot_seqid) |
b85d4c01 BH |
1496 | return nfserr_replay_cache; |
1497 | /* Wraparound */ | |
88e588d5 | 1498 | if (seqid == 1 && (slot_seqid + 1) == 0) |
b85d4c01 BH |
1499 | return nfs_ok; |
1500 | /* Misordered replay or misordered new request */ | |
1501 | return nfserr_seq_misordered; | |
1502 | } | |
1503 | ||
49557cc7 AA |
1504 | /* |
1505 | * Cache the create session result into the create session single DRC | |
1506 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
1507 | * Do this for solo or embedded create session operations. | |
1508 | */ | |
1509 | static void | |
1510 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
1511 | struct nfsd4_clid_slot *slot, int nfserr) | |
1512 | { | |
1513 | slot->sl_status = nfserr; | |
1514 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
1515 | } | |
1516 | ||
1517 | static __be32 | |
1518 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
1519 | struct nfsd4_clid_slot *slot) | |
1520 | { | |
1521 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
1522 | return slot->sl_status; | |
1523 | } | |
1524 | ||
1b74c25b MJ |
1525 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
1526 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
1527 | 1 + /* MIN tag is length with zero, only length */ \ | |
1528 | 3 + /* version, opcount, opcode */ \ | |
1529 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1530 | /* seqid, slotID, slotID, cache */ \ | |
1531 | 4 ) * sizeof(__be32)) | |
1532 | ||
1533 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
1534 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
1535 | 1 + /* status */ \ | |
1536 | 1 + /* MIN tag is length with zero, only length */ \ | |
1537 | 3 + /* opcount, opcode, opstatus*/ \ | |
1538 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1539 | /* seqid, slotID, slotID, slotID, status */ \ | |
1540 | 5 ) * sizeof(__be32)) | |
1541 | ||
1542 | static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs fchannel) | |
1543 | { | |
1544 | return fchannel.maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ | |
1545 | || fchannel.maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ; | |
1546 | } | |
1547 | ||
069b6ad4 AA |
1548 | __be32 |
1549 | nfsd4_create_session(struct svc_rqst *rqstp, | |
1550 | struct nfsd4_compound_state *cstate, | |
1551 | struct nfsd4_create_session *cr_ses) | |
1552 | { | |
363168b4 | 1553 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 1554 | struct nfs4_client *conf, *unconf; |
ac7c46f2 | 1555 | struct nfsd4_session *new; |
49557cc7 | 1556 | struct nfsd4_clid_slot *cs_slot = NULL; |
86c3e16c | 1557 | bool confirm_me = false; |
ec6b5d7b AA |
1558 | int status = 0; |
1559 | ||
a62573dc MJ |
1560 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
1561 | return nfserr_inval; | |
1562 | ||
ec6b5d7b AA |
1563 | nfs4_lock_state(); |
1564 | unconf = find_unconfirmed_client(&cr_ses->clientid); | |
1565 | conf = find_confirmed_client(&cr_ses->clientid); | |
1566 | ||
1567 | if (conf) { | |
49557cc7 AA |
1568 | cs_slot = &conf->cl_cs_slot; |
1569 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 1570 | if (status == nfserr_replay_cache) { |
ec6b5d7b | 1571 | dprintk("Got a create_session replay! seqid= %d\n", |
49557cc7 | 1572 | cs_slot->sl_seqid); |
38eb76a5 | 1573 | /* Return the cached reply status */ |
49557cc7 | 1574 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
38eb76a5 | 1575 | goto out; |
49557cc7 | 1576 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b AA |
1577 | status = nfserr_seq_misordered; |
1578 | dprintk("Sequence misordered!\n"); | |
1579 | dprintk("Expected seqid= %d but got seqid= %d\n", | |
49557cc7 | 1580 | cs_slot->sl_seqid, cr_ses->seqid); |
ec6b5d7b AA |
1581 | goto out; |
1582 | } | |
ec6b5d7b AA |
1583 | } else if (unconf) { |
1584 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || | |
363168b4 | 1585 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b AA |
1586 | status = nfserr_clid_inuse; |
1587 | goto out; | |
1588 | } | |
1589 | ||
49557cc7 AA |
1590 | cs_slot = &unconf->cl_cs_slot; |
1591 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
1592 | if (status) { |
1593 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 1594 | status = nfserr_seq_misordered; |
cd5b8144 | 1595 | goto out; |
ec6b5d7b AA |
1596 | } |
1597 | ||
86c3e16c | 1598 | confirm_me = true; |
ec6b5d7b AA |
1599 | conf = unconf; |
1600 | } else { | |
1601 | status = nfserr_stale_clientid; | |
1602 | goto out; | |
1603 | } | |
1604 | ||
8323c3b2 BF |
1605 | /* |
1606 | * XXX: we should probably set this at creation time, and check | |
1607 | * for consistent minorversion use throughout: | |
1608 | */ | |
1609 | conf->cl_minorversion = 1; | |
408b79bc BF |
1610 | /* |
1611 | * We do not support RDMA or persistent sessions | |
1612 | */ | |
1613 | cr_ses->flags &= ~SESSION4_PERSIST; | |
1614 | cr_ses->flags &= ~SESSION4_RDMA; | |
1615 | ||
1b74c25b MJ |
1616 | status = nfserr_toosmall; |
1617 | if (check_forechannel_attrs(cr_ses->fore_channel)) | |
1618 | goto out; | |
1619 | ||
ac7c46f2 BF |
1620 | status = nfserr_jukebox; |
1621 | new = alloc_init_session(rqstp, conf, cr_ses); | |
1622 | if (!new) | |
ec6b5d7b | 1623 | goto out; |
ac7c46f2 BF |
1624 | status = nfs_ok; |
1625 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, | |
ec6b5d7b | 1626 | NFS4_MAX_SESSIONID_LEN); |
12050657 MJ |
1627 | memcpy(&cr_ses->fore_channel, &new->se_fchannel, |
1628 | sizeof(struct nfsd4_channel_attrs)); | |
86c3e16c | 1629 | cs_slot->sl_seqid++; |
49557cc7 | 1630 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 1631 | |
49557cc7 AA |
1632 | /* cache solo and embedded create sessions under the state lock */ |
1633 | nfsd4_cache_create_session(cr_ses, cs_slot, status); | |
86c3e16c BF |
1634 | if (confirm_me) |
1635 | move_to_confirmed(conf); | |
ec6b5d7b AA |
1636 | out: |
1637 | nfs4_unlock_state(); | |
1638 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1639 | return status; | |
069b6ad4 AA |
1640 | } |
1641 | ||
57716355 BF |
1642 | static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) |
1643 | { | |
1644 | struct nfsd4_compoundres *resp = rqstp->rq_resp; | |
1645 | struct nfsd4_compoundargs *argp = rqstp->rq_argp; | |
1646 | ||
1647 | return argp->opcnt == resp->opcnt; | |
1648 | } | |
1649 | ||
1d1bc8f2 BF |
1650 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
1651 | { | |
1652 | switch (*dir) { | |
1653 | case NFS4_CDFC4_FORE: | |
1654 | case NFS4_CDFC4_BACK: | |
1655 | return nfs_ok; | |
1656 | case NFS4_CDFC4_FORE_OR_BOTH: | |
1657 | case NFS4_CDFC4_BACK_OR_BOTH: | |
1658 | *dir = NFS4_CDFC4_BOTH; | |
1659 | return nfs_ok; | |
1660 | }; | |
1661 | return nfserr_inval; | |
1662 | } | |
1663 | ||
1664 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, | |
1665 | struct nfsd4_compound_state *cstate, | |
1666 | struct nfsd4_bind_conn_to_session *bcts) | |
1667 | { | |
1668 | __be32 status; | |
1669 | ||
1670 | if (!nfsd4_last_compound_op(rqstp)) | |
1671 | return nfserr_not_only_op; | |
1672 | spin_lock(&client_lock); | |
1673 | cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid); | |
1674 | /* Sorta weird: we only need the refcnt'ing because new_conn acquires | |
1675 | * client_lock iself: */ | |
1676 | if (cstate->session) { | |
1677 | nfsd4_get_session(cstate->session); | |
1678 | atomic_inc(&cstate->session->se_client->cl_refcount); | |
1679 | } | |
1680 | spin_unlock(&client_lock); | |
1681 | if (!cstate->session) | |
1682 | return nfserr_badsession; | |
1683 | ||
1684 | status = nfsd4_map_bcts_dir(&bcts->dir); | |
1db2b9dd BS |
1685 | if (!status) |
1686 | nfsd4_new_conn(rqstp, cstate->session, bcts->dir); | |
1687 | return status; | |
1d1bc8f2 BF |
1688 | } |
1689 | ||
5d4cec2f BF |
1690 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
1691 | { | |
1692 | if (!session) | |
1693 | return 0; | |
1694 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
1695 | } | |
1696 | ||
069b6ad4 AA |
1697 | __be32 |
1698 | nfsd4_destroy_session(struct svc_rqst *r, | |
1699 | struct nfsd4_compound_state *cstate, | |
1700 | struct nfsd4_destroy_session *sessionid) | |
1701 | { | |
e10e0cfc BH |
1702 | struct nfsd4_session *ses; |
1703 | u32 status = nfserr_badsession; | |
1704 | ||
1705 | /* Notes: | |
1706 | * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid | |
1707 | * - Should we return nfserr_back_chan_busy if waiting for | |
1708 | * callbacks on to-be-destroyed session? | |
1709 | * - Do we need to clear any callback info from previous session? | |
1710 | */ | |
1711 | ||
5d4cec2f | 1712 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 BF |
1713 | if (!nfsd4_last_compound_op(r)) |
1714 | return nfserr_not_only_op; | |
1715 | } | |
e10e0cfc | 1716 | dump_sessionid(__func__, &sessionid->sessionid); |
9089f1b4 | 1717 | spin_lock(&client_lock); |
e10e0cfc BH |
1718 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid); |
1719 | if (!ses) { | |
9089f1b4 | 1720 | spin_unlock(&client_lock); |
e10e0cfc BH |
1721 | goto out; |
1722 | } | |
1723 | ||
1724 | unhash_session(ses); | |
9089f1b4 | 1725 | spin_unlock(&client_lock); |
e10e0cfc | 1726 | |
ab707e15 | 1727 | nfs4_lock_state(); |
84f5f7cc | 1728 | nfsd4_probe_callback_sync(ses->se_client); |
ab707e15 | 1729 | nfs4_unlock_state(); |
19cf5c02 BF |
1730 | |
1731 | nfsd4_del_conns(ses); | |
1732 | ||
e10e0cfc BH |
1733 | nfsd4_put_session(ses); |
1734 | status = nfs_ok; | |
1735 | out: | |
1736 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1737 | return status; | |
069b6ad4 AA |
1738 | } |
1739 | ||
a663bdd8 | 1740 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
1741 | { |
1742 | struct nfsd4_conn *c; | |
1743 | ||
1744 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 1745 | if (c->cn_xprt == xpt) { |
328ead28 BF |
1746 | return c; |
1747 | } | |
1748 | } | |
1749 | return NULL; | |
1750 | } | |
1751 | ||
a663bdd8 | 1752 | static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
1753 | { |
1754 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 1755 | struct nfsd4_conn *c; |
21b75b01 | 1756 | int ret; |
328ead28 BF |
1757 | |
1758 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 1759 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
328ead28 BF |
1760 | if (c) { |
1761 | spin_unlock(&clp->cl_lock); | |
1762 | free_conn(new); | |
1763 | return; | |
1764 | } | |
1765 | __nfsd4_hash_conn(new, ses); | |
1766 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
1767 | ret = nfsd4_register_conn(new); |
1768 | if (ret) | |
1769 | /* oops; xprt is already down: */ | |
1770 | nfsd4_conn_lost(&new->cn_xpt_user); | |
328ead28 BF |
1771 | return; |
1772 | } | |
1773 | ||
868b89c3 MJ |
1774 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
1775 | { | |
1776 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
1777 | ||
1778 | return args->opcnt > session->se_fchannel.maxops; | |
1779 | } | |
1780 | ||
ae82a8d0 MJ |
1781 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
1782 | struct nfsd4_session *session) | |
1783 | { | |
1784 | struct xdr_buf *xb = &rqstp->rq_arg; | |
1785 | ||
1786 | return xb->len > session->se_fchannel.maxreq_sz; | |
1787 | } | |
1788 | ||
069b6ad4 | 1789 | __be32 |
b85d4c01 | 1790 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
1791 | struct nfsd4_compound_state *cstate, |
1792 | struct nfsd4_sequence *seq) | |
1793 | { | |
f9bb94c4 | 1794 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
b85d4c01 BH |
1795 | struct nfsd4_session *session; |
1796 | struct nfsd4_slot *slot; | |
a663bdd8 | 1797 | struct nfsd4_conn *conn; |
b85d4c01 BH |
1798 | int status; |
1799 | ||
f9bb94c4 AA |
1800 | if (resp->opcnt != 1) |
1801 | return nfserr_sequence_pos; | |
1802 | ||
a663bdd8 BF |
1803 | /* |
1804 | * Will be either used or freed by nfsd4_sequence_check_conn | |
1805 | * below. | |
1806 | */ | |
1807 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
1808 | if (!conn) | |
1809 | return nfserr_jukebox; | |
1810 | ||
9089f1b4 | 1811 | spin_lock(&client_lock); |
b85d4c01 BH |
1812 | status = nfserr_badsession; |
1813 | session = find_in_sessionid_hashtbl(&seq->sessionid); | |
1814 | if (!session) | |
1815 | goto out; | |
1816 | ||
868b89c3 MJ |
1817 | status = nfserr_too_many_ops; |
1818 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
1819 | goto out; | |
1820 | ||
ae82a8d0 MJ |
1821 | status = nfserr_req_too_big; |
1822 | if (nfsd4_request_too_big(rqstp, session)) | |
1823 | goto out; | |
1824 | ||
b85d4c01 | 1825 | status = nfserr_badslot; |
6c18ba9f | 1826 | if (seq->slotid >= session->se_fchannel.maxreqs) |
b85d4c01 BH |
1827 | goto out; |
1828 | ||
557ce264 | 1829 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
1830 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
1831 | ||
a8dfdaeb AA |
1832 | /* We do not negotiate the number of slots yet, so set the |
1833 | * maxslots to the session maxreqs which is used to encode | |
1834 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
1835 | seq->maxslots = session->se_fchannel.maxreqs; | |
1836 | ||
88e588d5 | 1837 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, slot->sl_inuse); |
b85d4c01 BH |
1838 | if (status == nfserr_replay_cache) { |
1839 | cstate->slot = slot; | |
1840 | cstate->session = session; | |
da3846a2 | 1841 | /* Return the cached reply status and set cstate->status |
557ce264 | 1842 | * for nfsd4_proc_compound processing */ |
bf864a31 | 1843 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 1844 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 1845 | goto out; |
b85d4c01 BH |
1846 | } |
1847 | if (status) | |
1848 | goto out; | |
1849 | ||
a663bdd8 BF |
1850 | nfsd4_sequence_check_conn(conn, session); |
1851 | conn = NULL; | |
328ead28 | 1852 | |
b85d4c01 BH |
1853 | /* Success! bump slot seqid */ |
1854 | slot->sl_inuse = true; | |
1855 | slot->sl_seqid = seq->seqid; | |
557ce264 | 1856 | slot->sl_cachethis = seq->cachethis; |
b85d4c01 BH |
1857 | |
1858 | cstate->slot = slot; | |
1859 | cstate->session = session; | |
1860 | ||
b85d4c01 | 1861 | out: |
26c0c75e | 1862 | /* Hold a session reference until done processing the compound. */ |
aaf84eb9 | 1863 | if (cstate->session) { |
0d7bb719 BF |
1864 | struct nfs4_client *clp = session->se_client; |
1865 | ||
36acb66b | 1866 | nfsd4_get_session(cstate->session); |
0d7bb719 BF |
1867 | atomic_inc(&clp->cl_refcount); |
1868 | if (clp->cl_cb_state == NFSD4_CB_DOWN) | |
1869 | seq->status_flags |= SEQ4_STATUS_CB_PATH_DOWN; | |
aaf84eb9 | 1870 | } |
a663bdd8 | 1871 | kfree(conn); |
36acb66b | 1872 | spin_unlock(&client_lock); |
b85d4c01 BH |
1873 | dprintk("%s: return %d\n", __func__, ntohl(status)); |
1874 | return status; | |
069b6ad4 AA |
1875 | } |
1876 | ||
4dc6ec00 BF |
1877 | __be32 |
1878 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
1879 | { | |
bcecf1cc MJ |
1880 | int status = 0; |
1881 | ||
4dc6ec00 BF |
1882 | if (rc->rca_one_fs) { |
1883 | if (!cstate->current_fh.fh_dentry) | |
1884 | return nfserr_nofilehandle; | |
1885 | /* | |
1886 | * We don't take advantage of the rca_one_fs case. | |
1887 | * That's OK, it's optional, we can safely ignore it. | |
1888 | */ | |
1889 | return nfs_ok; | |
1890 | } | |
bcecf1cc | 1891 | |
4dc6ec00 | 1892 | nfs4_lock_state(); |
bcecf1cc MJ |
1893 | status = nfserr_complete_already; |
1894 | if (cstate->session->se_client->cl_firststate) | |
1895 | goto out; | |
1896 | ||
1897 | status = nfserr_stale_clientid; | |
1898 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
1899 | /* |
1900 | * The following error isn't really legal. | |
1901 | * But we only get here if the client just explicitly | |
1902 | * destroyed the client. Surely it no longer cares what | |
1903 | * error it gets back on an operation for the dead | |
1904 | * client. | |
1905 | */ | |
bcecf1cc MJ |
1906 | goto out; |
1907 | ||
1908 | status = nfs_ok; | |
4dc6ec00 | 1909 | nfsd4_create_clid_dir(cstate->session->se_client); |
bcecf1cc | 1910 | out: |
4dc6ec00 | 1911 | nfs4_unlock_state(); |
bcecf1cc | 1912 | return status; |
4dc6ec00 BF |
1913 | } |
1914 | ||
b37ad28b | 1915 | __be32 |
b591480b BF |
1916 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
1917 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 1918 | { |
1da177e4 LT |
1919 | struct xdr_netobj clname = { |
1920 | .len = setclid->se_namelen, | |
1921 | .data = setclid->se_name, | |
1922 | }; | |
1923 | nfs4_verifier clverifier = setclid->se_verf; | |
1924 | unsigned int strhashval; | |
28ce6054 | 1925 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 1926 | __be32 status; |
a55370a3 | 1927 | char dname[HEXDIR_LEN]; |
1da177e4 | 1928 | |
1da177e4 | 1929 | if (!check_name(clname)) |
73aea4ec | 1930 | return nfserr_inval; |
1da177e4 | 1931 | |
a55370a3 N |
1932 | status = nfs4_make_rec_clidname(dname, &clname); |
1933 | if (status) | |
73aea4ec | 1934 | return status; |
a55370a3 | 1935 | |
1da177e4 LT |
1936 | /* |
1937 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
1938 | * We get here on a DRC miss. | |
1939 | */ | |
1940 | ||
a55370a3 | 1941 | strhashval = clientstr_hashval(dname); |
1da177e4 | 1942 | |
1da177e4 | 1943 | nfs4_lock_state(); |
e203d506 | 1944 | conf = find_confirmed_client_by_str(dname, strhashval); |
28ce6054 | 1945 | if (conf) { |
a186e767 | 1946 | /* RFC 3530 14.2.33 CASE 0: */ |
1da177e4 | 1947 | status = nfserr_clid_inuse; |
e203d506 BF |
1948 | if (clp_used_exchangeid(conf)) |
1949 | goto out; | |
026722c2 | 1950 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
1951 | char addr_str[INET6_ADDRSTRLEN]; |
1952 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
1953 | sizeof(addr_str)); | |
1954 | dprintk("NFSD: setclientid: string in use by client " | |
1955 | "at %s\n", addr_str); | |
1da177e4 LT |
1956 | goto out; |
1957 | } | |
1da177e4 | 1958 | } |
a186e767 BF |
1959 | /* |
1960 | * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") | |
1961 | * has a description of SETCLIENTID request processing consisting | |
1962 | * of 5 bullet points, labeled as CASE0 - CASE4 below. | |
1963 | */ | |
e203d506 | 1964 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
3e772463 | 1965 | status = nfserr_jukebox; |
1da177e4 | 1966 | if (!conf) { |
a186e767 BF |
1967 | /* |
1968 | * RFC 3530 14.2.33 CASE 4: | |
1969 | * placed first, because it is the normal case | |
1da177e4 LT |
1970 | */ |
1971 | if (unconf) | |
1972 | expire_client(unconf); | |
b09333c4 | 1973 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 1974 | if (new == NULL) |
1da177e4 | 1975 | goto out; |
1da177e4 | 1976 | gen_clid(new); |
599e0a22 | 1977 | } else if (same_verf(&conf->cl_verifier, &clverifier)) { |
1da177e4 | 1978 | /* |
a186e767 BF |
1979 | * RFC 3530 14.2.33 CASE 1: |
1980 | * probable callback update | |
1da177e4 | 1981 | */ |
31f4a6c1 N |
1982 | if (unconf) { |
1983 | /* Note this is removing unconfirmed {*x***}, | |
1984 | * which is stronger than RFC recommended {vxc**}. | |
1985 | * This has the advantage that there is at most | |
1986 | * one {*x***} in either list at any time. | |
1987 | */ | |
1988 | expire_client(unconf); | |
1da177e4 | 1989 | } |
b09333c4 | 1990 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 1991 | if (new == NULL) |
1da177e4 | 1992 | goto out; |
1da177e4 | 1993 | copy_clid(new, conf); |
1da177e4 LT |
1994 | } else if (!unconf) { |
1995 | /* | |
a186e767 BF |
1996 | * RFC 3530 14.2.33 CASE 2: |
1997 | * probable client reboot; state will be removed if | |
1998 | * confirmed. | |
1da177e4 | 1999 | */ |
b09333c4 | 2000 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 2001 | if (new == NULL) |
1da177e4 | 2002 | goto out; |
1da177e4 | 2003 | gen_clid(new); |
49ba8781 | 2004 | } else { |
a186e767 BF |
2005 | /* |
2006 | * RFC 3530 14.2.33 CASE 3: | |
2007 | * probable client reboot; state will be removed if | |
2008 | * confirmed. | |
1da177e4 LT |
2009 | */ |
2010 | expire_client(unconf); | |
b09333c4 | 2011 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 2012 | if (new == NULL) |
1da177e4 | 2013 | goto out; |
1da177e4 | 2014 | gen_clid(new); |
1da177e4 | 2015 | } |
8323c3b2 BF |
2016 | /* |
2017 | * XXX: we should probably set this at creation time, and check | |
2018 | * for consistent minorversion use throughout: | |
2019 | */ | |
2020 | new->cl_minorversion = 0; | |
6f3d772f | 2021 | gen_callback(new, setclid, rqstp); |
c175b83c | 2022 | add_to_unconfirmed(new, strhashval); |
1da177e4 LT |
2023 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
2024 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
2025 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
2026 | status = nfs_ok; | |
2027 | out: | |
2028 | nfs4_unlock_state(); | |
2029 | return status; | |
2030 | } | |
2031 | ||
2032 | ||
2033 | /* | |
a186e767 BF |
2034 | * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has |
2035 | * a description of SETCLIENTID_CONFIRM request processing consisting of 4 | |
2036 | * bullets, labeled as CASE1 - CASE4 below. | |
1da177e4 | 2037 | */ |
b37ad28b | 2038 | __be32 |
b591480b BF |
2039 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
2040 | struct nfsd4_compound_state *cstate, | |
2041 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 2042 | { |
363168b4 | 2043 | struct sockaddr *sa = svc_addr(rqstp); |
21ab45a4 | 2044 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
2045 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
2046 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 2047 | __be32 status; |
1da177e4 LT |
2048 | |
2049 | if (STALE_CLIENTID(clid)) | |
2050 | return nfserr_stale_clientid; | |
2051 | /* | |
2052 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
2053 | * We get here on a DRC miss. | |
2054 | */ | |
2055 | ||
2056 | nfs4_lock_state(); | |
21ab45a4 N |
2057 | |
2058 | conf = find_confirmed_client(clid); | |
2059 | unconf = find_unconfirmed_client(clid); | |
2060 | ||
2061 | status = nfserr_clid_inuse; | |
363168b4 | 2062 | if (conf && !rpc_cmp_addr((struct sockaddr *) &conf->cl_addr, sa)) |
21ab45a4 | 2063 | goto out; |
363168b4 | 2064 | if (unconf && !rpc_cmp_addr((struct sockaddr *) &unconf->cl_addr, sa)) |
21ab45a4 N |
2065 | goto out; |
2066 | ||
a186e767 BF |
2067 | /* |
2068 | * section 14.2.34 of RFC 3530 has a description of | |
2069 | * SETCLIENTID_CONFIRM request processing consisting | |
2070 | * of 4 bullet points, labeled as CASE1 - CASE4 below. | |
2071 | */ | |
366e0c1d | 2072 | if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { |
a186e767 BF |
2073 | /* |
2074 | * RFC 3530 14.2.34 CASE 1: | |
2075 | * callback update | |
2076 | */ | |
599e0a22 | 2077 | if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) |
1da177e4 LT |
2078 | status = nfserr_clid_inuse; |
2079 | else { | |
5a3c9d71 BF |
2080 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
2081 | nfsd4_probe_callback(conf); | |
1a69c179 | 2082 | expire_client(unconf); |
1da177e4 | 2083 | status = nfs_ok; |
1a69c179 | 2084 | |
1da177e4 | 2085 | } |
f3aba4e5 | 2086 | } else if (conf && !unconf) { |
a186e767 BF |
2087 | /* |
2088 | * RFC 3530 14.2.34 CASE 2: | |
2089 | * probable retransmitted request; play it safe and | |
2090 | * do nothing. | |
7c79f737 | 2091 | */ |
599e0a22 | 2092 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) |
1da177e4 | 2093 | status = nfserr_clid_inuse; |
21ab45a4 | 2094 | else |
1da177e4 | 2095 | status = nfs_ok; |
7c79f737 | 2096 | } else if (!conf && unconf |
599e0a22 | 2097 | && same_verf(&unconf->cl_confirm, &confirm)) { |
a186e767 BF |
2098 | /* |
2099 | * RFC 3530 14.2.34 CASE 3: | |
2100 | * Normal case; new or rebooted client: | |
7c79f737 | 2101 | */ |
599e0a22 | 2102 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { |
1da177e4 LT |
2103 | status = nfserr_clid_inuse; |
2104 | } else { | |
1a69c179 N |
2105 | unsigned int hash = |
2106 | clientstr_hashval(unconf->cl_recdir); | |
2107 | conf = find_confirmed_client_by_str(unconf->cl_recdir, | |
e203d506 | 2108 | hash); |
1a69c179 | 2109 | if (conf) { |
c7b9a459 | 2110 | nfsd4_remove_clid_dir(conf); |
1a69c179 N |
2111 | expire_client(conf); |
2112 | } | |
1da177e4 | 2113 | move_to_confirmed(unconf); |
21ab45a4 | 2114 | conf = unconf; |
5a3c9d71 | 2115 | nfsd4_probe_callback(conf); |
1a69c179 | 2116 | status = nfs_ok; |
1da177e4 | 2117 | } |
599e0a22 BF |
2118 | } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) |
2119 | && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, | |
7c79f737 | 2120 | &confirm)))) { |
a186e767 BF |
2121 | /* |
2122 | * RFC 3530 14.2.34 CASE 4: | |
2123 | * Client probably hasn't noticed that we rebooted yet. | |
7c79f737 | 2124 | */ |
1da177e4 | 2125 | status = nfserr_stale_clientid; |
7c79f737 | 2126 | } else { |
08e8987c N |
2127 | /* check that we have hit one of the cases...*/ |
2128 | status = nfserr_clid_inuse; | |
2129 | } | |
1da177e4 | 2130 | out: |
1da177e4 LT |
2131 | nfs4_unlock_state(); |
2132 | return status; | |
2133 | } | |
2134 | ||
1da177e4 LT |
2135 | /* OPEN Share state helper functions */ |
2136 | static inline struct nfs4_file * | |
2137 | alloc_init_file(struct inode *ino) | |
2138 | { | |
2139 | struct nfs4_file *fp; | |
2140 | unsigned int hashval = file_hashval(ino); | |
2141 | ||
e60d4398 N |
2142 | fp = kmem_cache_alloc(file_slab, GFP_KERNEL); |
2143 | if (fp) { | |
8b671b80 | 2144 | atomic_set(&fp->fi_ref, 1); |
1da177e4 | 2145 | INIT_LIST_HEAD(&fp->fi_hash); |
8beefa24 N |
2146 | INIT_LIST_HEAD(&fp->fi_stateids); |
2147 | INIT_LIST_HEAD(&fp->fi_delegations); | |
1da177e4 LT |
2148 | fp->fi_inode = igrab(ino); |
2149 | fp->fi_id = current_fileid++; | |
47f9940c | 2150 | fp->fi_had_conflict = false; |
acfdf5c3 | 2151 | fp->fi_lease = NULL; |
f9d7562f BF |
2152 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); |
2153 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
47cee541 PE |
2154 | spin_lock(&recall_lock); |
2155 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); | |
2156 | spin_unlock(&recall_lock); | |
1da177e4 LT |
2157 | return fp; |
2158 | } | |
2159 | return NULL; | |
2160 | } | |
2161 | ||
e60d4398 | 2162 | static void |
e18b890b | 2163 | nfsd4_free_slab(struct kmem_cache **slab) |
1da177e4 | 2164 | { |
e60d4398 N |
2165 | if (*slab == NULL) |
2166 | return; | |
1a1d92c1 | 2167 | kmem_cache_destroy(*slab); |
e60d4398 | 2168 | *slab = NULL; |
1da177e4 LT |
2169 | } |
2170 | ||
e8ff2a84 | 2171 | void |
1da177e4 LT |
2172 | nfsd4_free_slabs(void) |
2173 | { | |
fe0750e5 BF |
2174 | nfsd4_free_slab(&openowner_slab); |
2175 | nfsd4_free_slab(&lockowner_slab); | |
e60d4398 | 2176 | nfsd4_free_slab(&file_slab); |
5ac049ac | 2177 | nfsd4_free_slab(&stateid_slab); |
5b2d21c1 | 2178 | nfsd4_free_slab(&deleg_slab); |
e60d4398 | 2179 | } |
1da177e4 | 2180 | |
e60d4398 N |
2181 | static int |
2182 | nfsd4_init_slabs(void) | |
2183 | { | |
fe0750e5 BF |
2184 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
2185 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2186 | if (openowner_slab == NULL) | |
2187 | goto out_nomem; | |
2188 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", | |
2189 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2190 | if (lockowner_slab == NULL) | |
e60d4398 N |
2191 | goto out_nomem; |
2192 | file_slab = kmem_cache_create("nfsd4_files", | |
20c2df83 | 2193 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 N |
2194 | if (file_slab == NULL) |
2195 | goto out_nomem; | |
5ac049ac | 2196 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
20c2df83 | 2197 | sizeof(struct nfs4_stateid), 0, 0, NULL); |
5ac049ac N |
2198 | if (stateid_slab == NULL) |
2199 | goto out_nomem; | |
5b2d21c1 | 2200 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 2201 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 N |
2202 | if (deleg_slab == NULL) |
2203 | goto out_nomem; | |
e60d4398 N |
2204 | return 0; |
2205 | out_nomem: | |
2206 | nfsd4_free_slabs(); | |
2207 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | |
2208 | return -ENOMEM; | |
1da177e4 LT |
2209 | } |
2210 | ||
fe0750e5 BF |
2211 | void nfs4_free_openowner(struct nfs4_openowner *oo) |
2212 | { | |
2213 | kfree(oo->oo_owner.so_owner.data); | |
2214 | kmem_cache_free(openowner_slab, oo); | |
2215 | } | |
2216 | ||
2217 | void nfs4_free_lockowner(struct nfs4_lockowner *lo) | |
1da177e4 | 2218 | { |
fe0750e5 BF |
2219 | kfree(lo->lo_owner.so_owner.data); |
2220 | kmem_cache_free(lockowner_slab, lo); | |
1da177e4 LT |
2221 | } |
2222 | ||
ff194bd9 | 2223 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 2224 | { |
ff194bd9 BF |
2225 | rp->rp_status = nfserr_serverfault; |
2226 | rp->rp_buflen = 0; | |
2227 | rp->rp_buf = rp->rp_ibuf; | |
1da177e4 LT |
2228 | } |
2229 | ||
fe0750e5 | 2230 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 2231 | { |
1da177e4 | 2232 | struct nfs4_stateowner *sop; |
1da177e4 | 2233 | |
fe0750e5 | 2234 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
2235 | if (!sop) |
2236 | return NULL; | |
2237 | ||
2238 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); | |
2239 | if (!sop->so_owner.data) { | |
fe0750e5 | 2240 | kmem_cache_free(slab, sop); |
1da177e4 | 2241 | return NULL; |
ff194bd9 BF |
2242 | } |
2243 | sop->so_owner.len = owner->len; | |
2244 | ||
ea1da636 | 2245 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 | 2246 | sop->so_id = current_ownerid++; |
ff194bd9 BF |
2247 | sop->so_client = clp; |
2248 | init_nfs4_replay(&sop->so_replay); | |
2249 | return sop; | |
2250 | } | |
2251 | ||
fe0750e5 | 2252 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 BF |
2253 | { |
2254 | unsigned int idhashval; | |
2255 | ||
fe0750e5 BF |
2256 | idhashval = open_ownerid_hashval(oo->oo_owner.so_id); |
2257 | list_add(&oo->oo_owner.so_idhash, &open_ownerid_hashtbl[idhashval]); | |
2258 | list_add(&oo->oo_owner.so_strhash, &open_ownerstr_hashtbl[strhashval]); | |
2259 | list_add(&oo->oo_perclient, &clp->cl_openowners); | |
ff194bd9 BF |
2260 | } |
2261 | ||
fe0750e5 | 2262 | static struct nfs4_openowner * |
ff194bd9 | 2263 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { |
fe0750e5 | 2264 | struct nfs4_openowner *oo; |
ff194bd9 | 2265 | |
fe0750e5 BF |
2266 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
2267 | if (!oo) | |
ff194bd9 | 2268 | return NULL; |
fe0750e5 BF |
2269 | oo->oo_owner.so_is_open_owner = 1; |
2270 | oo->oo_owner.so_seqid = open->op_seqid; | |
2271 | oo->oo_confirmed = 0; | |
2272 | oo->oo_time = 0; | |
2273 | INIT_LIST_HEAD(&oo->oo_close_lru); | |
2274 | hash_openowner(oo, clp, strhashval); | |
2275 | return oo; | |
1da177e4 LT |
2276 | } |
2277 | ||
1da177e4 LT |
2278 | static inline void |
2279 | init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { | |
fe0750e5 BF |
2280 | struct nfs4_openowner *oo = open->op_openowner; |
2281 | unsigned int hashval = stateid_hashval(oo->oo_owner.so_id, fp->fi_id); | |
1da177e4 LT |
2282 | |
2283 | INIT_LIST_HEAD(&stp->st_hash); | |
ea1da636 N |
2284 | INIT_LIST_HEAD(&stp->st_perstateowner); |
2285 | INIT_LIST_HEAD(&stp->st_lockowners); | |
1da177e4 LT |
2286 | INIT_LIST_HEAD(&stp->st_perfile); |
2287 | list_add(&stp->st_hash, &stateid_hashtbl[hashval]); | |
fe0750e5 | 2288 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); |
8beefa24 | 2289 | list_add(&stp->st_perfile, &fp->fi_stateids); |
5fa0bbb4 | 2290 | stp->st_type = NFS4_OPEN_STID; |
fe0750e5 | 2291 | stp->st_stateowner = &oo->oo_owner; |
13cd2184 | 2292 | get_nfs4_file(fp); |
1da177e4 | 2293 | stp->st_file = fp; |
e4e83ea4 | 2294 | stp->st_stateid.si_boot = boot_time; |
fe0750e5 | 2295 | stp->st_stateid.si_stateownerid = oo->oo_owner.so_id; |
1da177e4 | 2296 | stp->st_stateid.si_fileid = fp->fi_id; |
73997dc4 | 2297 | /* note will be incremented before first return to client: */ |
1da177e4 LT |
2298 | stp->st_stateid.si_generation = 0; |
2299 | stp->st_access_bmap = 0; | |
2300 | stp->st_deny_bmap = 0; | |
84459a11 AA |
2301 | __set_bit(open->op_share_access & ~NFS4_SHARE_WANT_MASK, |
2302 | &stp->st_access_bmap); | |
1da177e4 | 2303 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
4c4cd222 | 2304 | stp->st_openstp = NULL; |
1da177e4 LT |
2305 | } |
2306 | ||
fd39ca9a | 2307 | static void |
fe0750e5 | 2308 | move_to_close_lru(struct nfs4_openowner *oo) |
1da177e4 | 2309 | { |
fe0750e5 | 2310 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 2311 | |
fe0750e5 BF |
2312 | list_move_tail(&oo->oo_close_lru, &close_lru); |
2313 | oo->oo_time = get_seconds(); | |
1da177e4 LT |
2314 | } |
2315 | ||
1da177e4 | 2316 | static int |
599e0a22 BF |
2317 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
2318 | clientid_t *clid) | |
2319 | { | |
2320 | return (sop->so_owner.len == owner->len) && | |
2321 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
2322 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
2323 | } |
2324 | ||
fe0750e5 | 2325 | static struct nfs4_openowner * |
1da177e4 LT |
2326 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) |
2327 | { | |
2328 | struct nfs4_stateowner *so = NULL; | |
2329 | ||
506f275f | 2330 | list_for_each_entry(so, &open_ownerstr_hashtbl[hashval], so_strhash) { |
599e0a22 | 2331 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) |
fe0750e5 | 2332 | return container_of(so, struct nfs4_openowner, oo_owner); |
1da177e4 LT |
2333 | } |
2334 | return NULL; | |
2335 | } | |
2336 | ||
2337 | /* search file_hashtbl[] for file */ | |
2338 | static struct nfs4_file * | |
2339 | find_file(struct inode *ino) | |
2340 | { | |
2341 | unsigned int hashval = file_hashval(ino); | |
2342 | struct nfs4_file *fp; | |
2343 | ||
8b671b80 | 2344 | spin_lock(&recall_lock); |
1da177e4 | 2345 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
13cd2184 N |
2346 | if (fp->fi_inode == ino) { |
2347 | get_nfs4_file(fp); | |
8b671b80 | 2348 | spin_unlock(&recall_lock); |
1da177e4 | 2349 | return fp; |
13cd2184 | 2350 | } |
1da177e4 | 2351 | } |
8b671b80 | 2352 | spin_unlock(&recall_lock); |
1da177e4 LT |
2353 | return NULL; |
2354 | } | |
2355 | ||
d87a8ade | 2356 | static inline int access_valid(u32 x, u32 minorversion) |
ba5a6a19 | 2357 | { |
d87a8ade | 2358 | if ((x & NFS4_SHARE_ACCESS_MASK) < NFS4_SHARE_ACCESS_READ) |
8838dc43 | 2359 | return 0; |
d87a8ade AA |
2360 | if ((x & NFS4_SHARE_ACCESS_MASK) > NFS4_SHARE_ACCESS_BOTH) |
2361 | return 0; | |
2362 | x &= ~NFS4_SHARE_ACCESS_MASK; | |
2363 | if (minorversion && x) { | |
2364 | if ((x & NFS4_SHARE_WANT_MASK) > NFS4_SHARE_WANT_CANCEL) | |
2365 | return 0; | |
2366 | if ((x & NFS4_SHARE_WHEN_MASK) > NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED) | |
2367 | return 0; | |
2368 | x &= ~(NFS4_SHARE_WANT_MASK | NFS4_SHARE_WHEN_MASK); | |
2369 | } | |
2370 | if (x) | |
8838dc43 BF |
2371 | return 0; |
2372 | return 1; | |
ba5a6a19 BF |
2373 | } |
2374 | ||
8838dc43 | 2375 | static inline int deny_valid(u32 x) |
ba5a6a19 | 2376 | { |
8838dc43 BF |
2377 | /* Note: unlike access bits, deny bits may be zero. */ |
2378 | return x <= NFS4_SHARE_DENY_BOTH; | |
ba5a6a19 | 2379 | } |
1da177e4 | 2380 | |
1da177e4 LT |
2381 | /* |
2382 | * Called to check deny when READ with all zero stateid or | |
2383 | * WRITE with all zero or all one stateid | |
2384 | */ | |
b37ad28b | 2385 | static __be32 |
1da177e4 LT |
2386 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
2387 | { | |
2388 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2389 | struct nfs4_file *fp; | |
2390 | struct nfs4_stateid *stp; | |
b37ad28b | 2391 | __be32 ret; |
1da177e4 LT |
2392 | |
2393 | dprintk("NFSD: nfs4_share_conflict\n"); | |
2394 | ||
2395 | fp = find_file(ino); | |
13cd2184 N |
2396 | if (!fp) |
2397 | return nfs_ok; | |
b700949b | 2398 | ret = nfserr_locked; |
1da177e4 | 2399 | /* Search for conflicting share reservations */ |
13cd2184 N |
2400 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
2401 | if (test_bit(deny_type, &stp->st_deny_bmap) || | |
2402 | test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) | |
2403 | goto out; | |
1da177e4 | 2404 | } |
13cd2184 N |
2405 | ret = nfs_ok; |
2406 | out: | |
2407 | put_nfs4_file(fp); | |
2408 | return ret; | |
1da177e4 LT |
2409 | } |
2410 | ||
6b57d9c8 | 2411 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
1da177e4 | 2412 | { |
1da177e4 LT |
2413 | /* We're assuming the state code never drops its reference |
2414 | * without first removing the lease. Since we're in this lease | |
2415 | * callback (and since the lease code is serialized by the kernel | |
2416 | * lock) we know the server hasn't removed the lease yet, we know | |
2417 | * it's safe to take a reference: */ | |
2418 | atomic_inc(&dp->dl_count); | |
2419 | ||
1da177e4 | 2420 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); |
1da177e4 | 2421 | |
460781b5 | 2422 | /* only place dl_time is set. protected by lock_flocks*/ |
1da177e4 LT |
2423 | dp->dl_time = get_seconds(); |
2424 | ||
6b57d9c8 BF |
2425 | nfsd4_cb_recall(dp); |
2426 | } | |
2427 | ||
acfdf5c3 | 2428 | /* Called from break_lease() with lock_flocks() held. */ |
6b57d9c8 BF |
2429 | static void nfsd_break_deleg_cb(struct file_lock *fl) |
2430 | { | |
acfdf5c3 BF |
2431 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
2432 | struct nfs4_delegation *dp; | |
6b57d9c8 | 2433 | |
acfdf5c3 BF |
2434 | BUG_ON(!fp); |
2435 | /* We assume break_lease is only called once per lease: */ | |
2436 | BUG_ON(fp->fi_had_conflict); | |
0272e1fd BF |
2437 | /* |
2438 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 2439 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 2440 | * in time: |
0272e1fd BF |
2441 | */ |
2442 | fl->fl_break_time = 0; | |
1da177e4 | 2443 | |
5d926e8c | 2444 | spin_lock(&recall_lock); |
acfdf5c3 BF |
2445 | fp->fi_had_conflict = true; |
2446 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
2447 | nfsd_break_one_deleg(dp); | |
5d926e8c | 2448 | spin_unlock(&recall_lock); |
1da177e4 LT |
2449 | } |
2450 | ||
1da177e4 LT |
2451 | static |
2452 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
2453 | { | |
2454 | if (arg & F_UNLCK) | |
2455 | return lease_modify(onlist, arg); | |
2456 | else | |
2457 | return -EAGAIN; | |
2458 | } | |
2459 | ||
7b021967 | 2460 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
2461 | .lm_break = nfsd_break_deleg_cb, |
2462 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
2463 | }; |
2464 | ||
7a8711c9 BF |
2465 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
2466 | { | |
2467 | if (nfsd4_has_session(cstate)) | |
2468 | return nfs_ok; | |
2469 | if (seqid == so->so_seqid - 1) | |
2470 | return nfserr_replay_me; | |
2471 | if (seqid == so->so_seqid) | |
2472 | return nfs_ok; | |
2473 | return nfserr_bad_seqid; | |
2474 | } | |
1da177e4 | 2475 | |
b37ad28b | 2476 | __be32 |
6668958f AA |
2477 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
2478 | struct nfsd4_open *open) | |
1da177e4 | 2479 | { |
1da177e4 LT |
2480 | clientid_t *clientid = &open->op_clientid; |
2481 | struct nfs4_client *clp = NULL; | |
2482 | unsigned int strhashval; | |
fe0750e5 | 2483 | struct nfs4_openowner *oo = NULL; |
7a8711c9 | 2484 | __be32 status; |
1da177e4 | 2485 | |
1da177e4 | 2486 | if (!check_name(open->op_owner)) |
0f442aa2 | 2487 | return nfserr_inval; |
1da177e4 LT |
2488 | |
2489 | if (STALE_CLIENTID(&open->op_clientid)) | |
2490 | return nfserr_stale_clientid; | |
2491 | ||
506f275f | 2492 | strhashval = open_ownerstr_hashval(clientid->cl_id, &open->op_owner); |
fe0750e5 BF |
2493 | oo = find_openstateowner_str(strhashval, open); |
2494 | open->op_openowner = oo; | |
2495 | if (!oo) { | |
0f442aa2 | 2496 | /* Make sure the client's lease hasn't expired. */ |
1da177e4 LT |
2497 | clp = find_confirmed_client(clientid); |
2498 | if (clp == NULL) | |
0f442aa2 BF |
2499 | return nfserr_expired; |
2500 | goto renew; | |
1da177e4 | 2501 | } |
fe0750e5 | 2502 | if (!oo->oo_confirmed) { |
0f442aa2 | 2503 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
2504 | clp = oo->oo_owner.so_client; |
2505 | release_openowner(oo); | |
2506 | open->op_openowner = NULL; | |
0f442aa2 BF |
2507 | goto renew; |
2508 | } | |
fe0750e5 | 2509 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
7a8711c9 BF |
2510 | if (status) |
2511 | return status; | |
1da177e4 | 2512 | renew: |
fe0750e5 BF |
2513 | if (open->op_openowner == NULL) { |
2514 | oo = alloc_init_open_stateowner(strhashval, clp, open); | |
2515 | if (oo == NULL) | |
3e772463 | 2516 | return nfserr_jukebox; |
fe0750e5 | 2517 | open->op_openowner = oo; |
0f442aa2 | 2518 | } |
fe0750e5 BF |
2519 | list_del_init(&oo->oo_close_lru); |
2520 | renew_client(oo->oo_owner.so_client); | |
0f442aa2 | 2521 | return nfs_ok; |
1da177e4 LT |
2522 | } |
2523 | ||
b37ad28b | 2524 | static inline __be32 |
4a6e43e6 N |
2525 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
2526 | { | |
2527 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
2528 | return nfserr_openmode; | |
2529 | else | |
2530 | return nfs_ok; | |
2531 | } | |
2532 | ||
52f4fb43 N |
2533 | static struct nfs4_delegation * |
2534 | find_delegation_file(struct nfs4_file *fp, stateid_t *stid) | |
2535 | { | |
32b007b4 | 2536 | struct nfs4_delegation *dp; |
52f4fb43 | 2537 | |
acfdf5c3 | 2538 | spin_lock(&recall_lock); |
32b007b4 BF |
2539 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) |
2540 | if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) { | |
2541 | spin_unlock(&recall_lock); | |
2542 | return dp; | |
2543 | } | |
acfdf5c3 | 2544 | spin_unlock(&recall_lock); |
32b007b4 | 2545 | return NULL; |
52f4fb43 N |
2546 | } |
2547 | ||
c47d832b | 2548 | static int share_access_to_flags(u32 share_access) |
24a0111e BF |
2549 | { |
2550 | share_access &= ~NFS4_SHARE_WANT_MASK; | |
2551 | ||
2552 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; | |
2553 | } | |
2554 | ||
b37ad28b | 2555 | static __be32 |
567d9829 N |
2556 | nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, |
2557 | struct nfs4_delegation **dp) | |
2558 | { | |
2559 | int flags; | |
b37ad28b | 2560 | __be32 status = nfserr_bad_stateid; |
567d9829 N |
2561 | |
2562 | *dp = find_delegation_file(fp, &open->op_delegate_stateid); | |
2563 | if (*dp == NULL) | |
c44c5eeb | 2564 | goto out; |
24a0111e | 2565 | flags = share_access_to_flags(open->op_share_access); |
567d9829 N |
2566 | status = nfs4_check_delegmode(*dp, flags); |
2567 | if (status) | |
2568 | *dp = NULL; | |
c44c5eeb N |
2569 | out: |
2570 | if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2571 | return nfs_ok; | |
2572 | if (status) | |
2573 | return status; | |
fe0750e5 | 2574 | open->op_openowner->oo_confirmed = 1; |
c44c5eeb | 2575 | return nfs_ok; |
567d9829 N |
2576 | } |
2577 | ||
b37ad28b | 2578 | static __be32 |
1da177e4 LT |
2579 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) |
2580 | { | |
2581 | struct nfs4_stateid *local; | |
fe0750e5 | 2582 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 2583 | |
8beefa24 | 2584 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
2585 | /* ignore lock owners */ |
2586 | if (local->st_stateowner->so_is_open_owner == 0) | |
2587 | continue; | |
2588 | /* remember if we have seen this open owner */ | |
fe0750e5 | 2589 | if (local->st_stateowner == &oo->oo_owner) |
1da177e4 LT |
2590 | *stpp = local; |
2591 | /* check for conflicting share reservations */ | |
2592 | if (!test_share(local, open)) | |
77eaae8d | 2593 | return nfserr_share_denied; |
1da177e4 | 2594 | } |
77eaae8d | 2595 | return nfs_ok; |
1da177e4 LT |
2596 | } |
2597 | ||
5ac049ac N |
2598 | static inline struct nfs4_stateid * |
2599 | nfs4_alloc_stateid(void) | |
2600 | { | |
2601 | return kmem_cache_alloc(stateid_slab, GFP_KERNEL); | |
2602 | } | |
2603 | ||
21fb4016 BF |
2604 | static inline int nfs4_access_to_access(u32 nfs4_access) |
2605 | { | |
2606 | int flags = 0; | |
2607 | ||
2608 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
2609 | flags |= NFSD_MAY_READ; | |
2610 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
2611 | flags |= NFSD_MAY_WRITE; | |
2612 | return flags; | |
2613 | } | |
2614 | ||
0c12eaff CB |
2615 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
2616 | struct svc_fh *cur_fh, struct nfsd4_open *open) | |
f9d7562f BF |
2617 | { |
2618 | __be32 status; | |
0c12eaff CB |
2619 | int oflag = nfs4_access_to_omode(open->op_share_access); |
2620 | int access = nfs4_access_to_access(open->op_share_access); | |
2621 | ||
2622 | /* CLAIM_DELEGATE_CUR is used in response to a broken lease; | |
2623 | * allowing it to break the lease and return EAGAIN leaves the | |
2624 | * client unable to make progress in returning the delegation */ | |
2625 | if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2626 | access |= NFSD_MAY_NOT_BREAK_LEASE; | |
f9d7562f BF |
2627 | |
2628 | if (!fp->fi_fds[oflag]) { | |
2629 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, | |
2630 | &fp->fi_fds[oflag]); | |
f9d7562f BF |
2631 | if (status) |
2632 | return status; | |
2633 | } | |
2634 | nfs4_file_get_access(fp, oflag); | |
2635 | ||
2636 | return nfs_ok; | |
2637 | } | |
2638 | ||
b37ad28b | 2639 | static __be32 |
1da177e4 | 2640 | nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, |
f9d7562f BF |
2641 | struct nfs4_file *fp, struct svc_fh *cur_fh, |
2642 | struct nfsd4_open *open) | |
1da177e4 LT |
2643 | { |
2644 | struct nfs4_stateid *stp; | |
f9d7562f | 2645 | __be32 status; |
1da177e4 | 2646 | |
5ac049ac | 2647 | stp = nfs4_alloc_stateid(); |
1da177e4 | 2648 | if (stp == NULL) |
3e772463 | 2649 | return nfserr_jukebox; |
1da177e4 | 2650 | |
0c12eaff | 2651 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); |
f9d7562f BF |
2652 | if (status) { |
2653 | kmem_cache_free(stateid_slab, stp); | |
2654 | return status; | |
1da177e4 | 2655 | } |
1da177e4 LT |
2656 | *stpp = stp; |
2657 | return 0; | |
2658 | } | |
2659 | ||
b37ad28b | 2660 | static inline __be32 |
1da177e4 LT |
2661 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
2662 | struct nfsd4_open *open) | |
2663 | { | |
2664 | struct iattr iattr = { | |
2665 | .ia_valid = ATTR_SIZE, | |
2666 | .ia_size = 0, | |
2667 | }; | |
2668 | if (!open->op_truncate) | |
2669 | return 0; | |
2670 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 2671 | return nfserr_inval; |
1da177e4 LT |
2672 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
2673 | } | |
2674 | ||
b37ad28b | 2675 | static __be32 |
f9d7562f | 2676 | nfs4_upgrade_open(struct svc_rqst *rqstp, struct nfs4_file *fp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open) |
1da177e4 | 2677 | { |
7d947842 BF |
2678 | u32 op_share_access = open->op_share_access & ~NFS4_SHARE_WANT_MASK; |
2679 | bool new_access; | |
b37ad28b | 2680 | __be32 status; |
1da177e4 | 2681 | |
7d947842 | 2682 | new_access = !test_bit(op_share_access, &stp->st_access_bmap); |
f9d7562f | 2683 | if (new_access) { |
0c12eaff | 2684 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); |
f9d7562f BF |
2685 | if (status) |
2686 | return status; | |
6c26d08f | 2687 | } |
1da177e4 LT |
2688 | status = nfsd4_truncate(rqstp, cur_fh, open); |
2689 | if (status) { | |
f9d7562f | 2690 | if (new_access) { |
f197c271 | 2691 | int oflag = nfs4_access_to_omode(op_share_access); |
f9d7562f BF |
2692 | nfs4_file_put_access(fp, oflag); |
2693 | } | |
1da177e4 LT |
2694 | return status; |
2695 | } | |
2696 | /* remember the open */ | |
24a0111e | 2697 | __set_bit(op_share_access, &stp->st_access_bmap); |
b55e0ba1 | 2698 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
1da177e4 LT |
2699 | |
2700 | return nfs_ok; | |
2701 | } | |
2702 | ||
2703 | ||
1da177e4 | 2704 | static void |
37515177 | 2705 | nfs4_set_claim_prev(struct nfsd4_open *open) |
1da177e4 | 2706 | { |
fe0750e5 BF |
2707 | open->op_openowner->oo_confirmed = 1; |
2708 | open->op_openowner->oo_owner.so_client->cl_firststate = 1; | |
1da177e4 LT |
2709 | } |
2710 | ||
14a24e99 BF |
2711 | /* Should we give out recallable state?: */ |
2712 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
2713 | { | |
2714 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
2715 | return true; | |
2716 | /* | |
2717 | * In the sessions case, since we don't have to establish a | |
2718 | * separate connection for callbacks, we assume it's OK | |
2719 | * until we hear otherwise: | |
2720 | */ | |
2721 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
2722 | } | |
2723 | ||
22d38c4c BF |
2724 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) |
2725 | { | |
2726 | struct file_lock *fl; | |
2727 | ||
2728 | fl = locks_alloc_lock(); | |
2729 | if (!fl) | |
2730 | return NULL; | |
2731 | locks_init_lock(fl); | |
2732 | fl->fl_lmops = &nfsd_lease_mng_ops; | |
2733 | fl->fl_flags = FL_LEASE; | |
2734 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; | |
2735 | fl->fl_end = OFFSET_MAX; | |
acfdf5c3 | 2736 | fl->fl_owner = (fl_owner_t)(dp->dl_file); |
22d38c4c | 2737 | fl->fl_pid = current->tgid; |
22d38c4c BF |
2738 | return fl; |
2739 | } | |
2740 | ||
edab9782 BF |
2741 | static int nfs4_setlease(struct nfs4_delegation *dp, int flag) |
2742 | { | |
acfdf5c3 | 2743 | struct nfs4_file *fp = dp->dl_file; |
edab9782 BF |
2744 | struct file_lock *fl; |
2745 | int status; | |
2746 | ||
2747 | fl = nfs4_alloc_init_lease(dp, flag); | |
2748 | if (!fl) | |
2749 | return -ENOMEM; | |
acfdf5c3 BF |
2750 | fl->fl_file = find_readable_file(fp); |
2751 | list_add(&dp->dl_perclnt, &dp->dl_client->cl_delegations); | |
2752 | status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); | |
edab9782 | 2753 | if (status) { |
acfdf5c3 | 2754 | list_del_init(&dp->dl_perclnt); |
edab9782 BF |
2755 | locks_free_lock(fl); |
2756 | return -ENOMEM; | |
2757 | } | |
acfdf5c3 BF |
2758 | fp->fi_lease = fl; |
2759 | fp->fi_deleg_file = fl->fl_file; | |
2760 | get_file(fp->fi_deleg_file); | |
2761 | atomic_set(&fp->fi_delegees, 1); | |
2762 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2763 | return 0; | |
2764 | } | |
2765 | ||
2766 | static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag) | |
2767 | { | |
2768 | struct nfs4_file *fp = dp->dl_file; | |
2769 | ||
2770 | if (!fp->fi_lease) | |
2771 | return nfs4_setlease(dp, flag); | |
2772 | spin_lock(&recall_lock); | |
2773 | if (fp->fi_had_conflict) { | |
2774 | spin_unlock(&recall_lock); | |
2775 | return -EAGAIN; | |
2776 | } | |
2777 | atomic_inc(&fp->fi_delegees); | |
2778 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2779 | spin_unlock(&recall_lock); | |
2780 | list_add(&dp->dl_perclnt, &dp->dl_client->cl_delegations); | |
edab9782 BF |
2781 | return 0; |
2782 | } | |
2783 | ||
1da177e4 LT |
2784 | /* |
2785 | * Attempt to hand out a delegation. | |
2786 | */ | |
2787 | static void | |
2788 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) | |
2789 | { | |
2790 | struct nfs4_delegation *dp; | |
fe0750e5 | 2791 | struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner); |
14a24e99 | 2792 | int cb_up; |
1da177e4 LT |
2793 | int status, flag = 0; |
2794 | ||
fe0750e5 | 2795 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
1da177e4 | 2796 | flag = NFS4_OPEN_DELEGATE_NONE; |
7b190fec N |
2797 | open->op_recall = 0; |
2798 | switch (open->op_claim_type) { | |
2799 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 2800 | if (!cb_up) |
7b190fec N |
2801 | open->op_recall = 1; |
2802 | flag = open->op_delegate_type; | |
2803 | if (flag == NFS4_OPEN_DELEGATE_NONE) | |
2804 | goto out; | |
2805 | break; | |
2806 | case NFS4_OPEN_CLAIM_NULL: | |
2807 | /* Let's not give out any delegations till everyone's | |
2808 | * had the chance to reclaim theirs.... */ | |
af558e33 | 2809 | if (locks_in_grace()) |
7b190fec | 2810 | goto out; |
fe0750e5 | 2811 | if (!cb_up || !oo->oo_confirmed) |
7b190fec N |
2812 | goto out; |
2813 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | |
2814 | flag = NFS4_OPEN_DELEGATE_WRITE; | |
2815 | else | |
2816 | flag = NFS4_OPEN_DELEGATE_READ; | |
2817 | break; | |
2818 | default: | |
2819 | goto out; | |
2820 | } | |
1da177e4 | 2821 | |
fe0750e5 | 2822 | dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh, flag); |
dd239cc0 BF |
2823 | if (dp == NULL) |
2824 | goto out_no_deleg; | |
acfdf5c3 | 2825 | status = nfs4_set_delegation(dp, flag); |
edab9782 | 2826 | if (status) |
dd239cc0 | 2827 | goto out_free; |
1da177e4 LT |
2828 | |
2829 | memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); | |
2830 | ||
8c10cbdb BH |
2831 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
2832 | STATEID_VAL(&dp->dl_stateid)); | |
1da177e4 | 2833 | out: |
7b190fec N |
2834 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS |
2835 | && flag == NFS4_OPEN_DELEGATE_NONE | |
2836 | && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) | |
2fdada03 | 2837 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
1da177e4 | 2838 | open->op_delegate_type = flag; |
dd239cc0 BF |
2839 | return; |
2840 | out_free: | |
acfdf5c3 | 2841 | nfs4_put_delegation(dp); |
dd239cc0 BF |
2842 | out_no_deleg: |
2843 | flag = NFS4_OPEN_DELEGATE_NONE; | |
2844 | goto out; | |
1da177e4 LT |
2845 | } |
2846 | ||
2847 | /* | |
2848 | * called with nfs4_lock_state() held. | |
2849 | */ | |
b37ad28b | 2850 | __be32 |
1da177e4 LT |
2851 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
2852 | { | |
6668958f | 2853 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
1da177e4 LT |
2854 | struct nfs4_file *fp = NULL; |
2855 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2856 | struct nfs4_stateid *stp = NULL; | |
567d9829 | 2857 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 2858 | __be32 status; |
1da177e4 LT |
2859 | |
2860 | status = nfserr_inval; | |
d87a8ade | 2861 | if (!access_valid(open->op_share_access, resp->cstate.minorversion) |
ba5a6a19 | 2862 | || !deny_valid(open->op_share_deny)) |
1da177e4 LT |
2863 | goto out; |
2864 | /* | |
2865 | * Lookup file; if found, lookup stateid and check open request, | |
2866 | * and check for delegations in the process of being recalled. | |
2867 | * If not found, create the nfs4_file struct | |
2868 | */ | |
2869 | fp = find_file(ino); | |
2870 | if (fp) { | |
2871 | if ((status = nfs4_check_open(fp, open, &stp))) | |
2872 | goto out; | |
c44c5eeb N |
2873 | status = nfs4_check_deleg(fp, open, &dp); |
2874 | if (status) | |
2875 | goto out; | |
1da177e4 | 2876 | } else { |
c44c5eeb N |
2877 | status = nfserr_bad_stateid; |
2878 | if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2879 | goto out; | |
3e772463 | 2880 | status = nfserr_jukebox; |
1da177e4 LT |
2881 | fp = alloc_init_file(ino); |
2882 | if (fp == NULL) | |
2883 | goto out; | |
2884 | } | |
2885 | ||
2886 | /* | |
2887 | * OPEN the file, or upgrade an existing OPEN. | |
2888 | * If truncate fails, the OPEN fails. | |
2889 | */ | |
2890 | if (stp) { | |
2891 | /* Stateid was found, this is an OPEN upgrade */ | |
f9d7562f | 2892 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
1da177e4 LT |
2893 | if (status) |
2894 | goto out; | |
2895 | } else { | |
f9d7562f | 2896 | status = nfs4_new_open(rqstp, &stp, fp, current_fh, open); |
567d9829 | 2897 | if (status) |
1da177e4 LT |
2898 | goto out; |
2899 | init_stateid(stp, fp, open); | |
2900 | status = nfsd4_truncate(rqstp, current_fh, open); | |
2901 | if (status) { | |
2283963f | 2902 | release_open_stateid(stp); |
1da177e4 LT |
2903 | goto out; |
2904 | } | |
2905 | } | |
73997dc4 | 2906 | update_stateid(&stp->st_stateid); |
1da177e4 LT |
2907 | memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); |
2908 | ||
4dc6ec00 | 2909 | if (nfsd4_has_session(&resp->cstate)) |
fe0750e5 | 2910 | open->op_openowner->oo_confirmed = 1; |
6668958f | 2911 | |
1da177e4 LT |
2912 | /* |
2913 | * Attempt to hand out a delegation. No error return, because the | |
2914 | * OPEN succeeds even if we fail. | |
2915 | */ | |
2916 | nfs4_open_delegation(current_fh, open, stp); | |
2917 | ||
2918 | status = nfs_ok; | |
2919 | ||
8c10cbdb BH |
2920 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
2921 | STATEID_VAL(&stp->st_stateid)); | |
1da177e4 | 2922 | out: |
13cd2184 N |
2923 | if (fp) |
2924 | put_nfs4_file(fp); | |
37515177 N |
2925 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
2926 | nfs4_set_claim_prev(open); | |
1da177e4 LT |
2927 | /* |
2928 | * To finish the open response, we just need to set the rflags. | |
2929 | */ | |
2930 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
fe0750e5 | 2931 | if (!open->op_openowner->oo_confirmed && |
6668958f | 2932 | !nfsd4_has_session(&resp->cstate)) |
1da177e4 LT |
2933 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
2934 | ||
2935 | return status; | |
2936 | } | |
2937 | ||
b37ad28b | 2938 | __be32 |
b591480b BF |
2939 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2940 | clientid_t *clid) | |
1da177e4 LT |
2941 | { |
2942 | struct nfs4_client *clp; | |
b37ad28b | 2943 | __be32 status; |
1da177e4 LT |
2944 | |
2945 | nfs4_lock_state(); | |
2946 | dprintk("process_renew(%08x/%08x): starting\n", | |
2947 | clid->cl_boot, clid->cl_id); | |
2948 | status = nfserr_stale_clientid; | |
2949 | if (STALE_CLIENTID(clid)) | |
2950 | goto out; | |
2951 | clp = find_confirmed_client(clid); | |
2952 | status = nfserr_expired; | |
2953 | if (clp == NULL) { | |
2954 | /* We assume the client took too long to RENEW. */ | |
2955 | dprintk("nfsd4_renew: clientid not found!\n"); | |
2956 | goto out; | |
2957 | } | |
2958 | renew_client(clp); | |
2959 | status = nfserr_cb_path_down; | |
ea1da636 | 2960 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 2961 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
2962 | goto out; |
2963 | status = nfs_ok; | |
2964 | out: | |
2965 | nfs4_unlock_state(); | |
2966 | return status; | |
2967 | } | |
2968 | ||
c47d832b | 2969 | static struct lock_manager nfsd4_manager = { |
af558e33 BF |
2970 | }; |
2971 | ||
a76b4319 | 2972 | static void |
af558e33 | 2973 | nfsd4_end_grace(void) |
a76b4319 N |
2974 | { |
2975 | dprintk("NFSD: end of grace period\n"); | |
c7b9a459 | 2976 | nfsd4_recdir_purge_old(); |
af558e33 | 2977 | locks_end_grace(&nfsd4_manager); |
e46b498c BF |
2978 | /* |
2979 | * Now that every NFSv4 client has had the chance to recover and | |
2980 | * to see the (possibly new, possibly shorter) lease time, we | |
2981 | * can safely set the next grace time to the current lease time: | |
2982 | */ | |
2983 | nfsd4_grace = nfsd4_lease; | |
a76b4319 N |
2984 | } |
2985 | ||
fd39ca9a | 2986 | static time_t |
1da177e4 LT |
2987 | nfs4_laundromat(void) |
2988 | { | |
2989 | struct nfs4_client *clp; | |
fe0750e5 | 2990 | struct nfs4_openowner *oo; |
1da177e4 LT |
2991 | struct nfs4_delegation *dp; |
2992 | struct list_head *pos, *next, reaplist; | |
cf07d2ea BF |
2993 | time_t cutoff = get_seconds() - nfsd4_lease; |
2994 | time_t t, clientid_val = nfsd4_lease; | |
2995 | time_t u, test_val = nfsd4_lease; | |
1da177e4 LT |
2996 | |
2997 | nfs4_lock_state(); | |
2998 | ||
2999 | dprintk("NFSD: laundromat service - starting\n"); | |
af558e33 BF |
3000 | if (locks_in_grace()) |
3001 | nfsd4_end_grace(); | |
36acb66b BH |
3002 | INIT_LIST_HEAD(&reaplist); |
3003 | spin_lock(&client_lock); | |
1da177e4 LT |
3004 | list_for_each_safe(pos, next, &client_lru) { |
3005 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
3006 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
3007 | t = clp->cl_time - cutoff; | |
3008 | if (clientid_val > t) | |
3009 | clientid_val = t; | |
3010 | break; | |
3011 | } | |
d7682988 BH |
3012 | if (atomic_read(&clp->cl_refcount)) { |
3013 | dprintk("NFSD: client in use (clientid %08x)\n", | |
3014 | clp->cl_clientid.cl_id); | |
3015 | continue; | |
3016 | } | |
3017 | unhash_client_locked(clp); | |
3018 | list_add(&clp->cl_lru, &reaplist); | |
36acb66b BH |
3019 | } |
3020 | spin_unlock(&client_lock); | |
3021 | list_for_each_safe(pos, next, &reaplist) { | |
3022 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
3023 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
3024 | clp->cl_clientid.cl_id); | |
c7b9a459 | 3025 | nfsd4_remove_clid_dir(clp); |
1da177e4 LT |
3026 | expire_client(clp); |
3027 | } | |
1da177e4 LT |
3028 | spin_lock(&recall_lock); |
3029 | list_for_each_safe(pos, next, &del_recall_lru) { | |
3030 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3031 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
3032 | u = dp->dl_time - cutoff; | |
3033 | if (test_val > u) | |
3034 | test_val = u; | |
3035 | break; | |
3036 | } | |
1da177e4 LT |
3037 | list_move(&dp->dl_recall_lru, &reaplist); |
3038 | } | |
3039 | spin_unlock(&recall_lock); | |
3040 | list_for_each_safe(pos, next, &reaplist) { | |
3041 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3042 | list_del_init(&dp->dl_recall_lru); | |
3043 | unhash_delegation(dp); | |
3044 | } | |
cf07d2ea | 3045 | test_val = nfsd4_lease; |
1da177e4 | 3046 | list_for_each_safe(pos, next, &close_lru) { |
fe0750e5 BF |
3047 | oo = container_of(pos, struct nfs4_openowner, oo_close_lru); |
3048 | if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { | |
3049 | u = oo->oo_time - cutoff; | |
1da177e4 LT |
3050 | if (test_val > u) |
3051 | test_val = u; | |
3052 | break; | |
3053 | } | |
3054 | dprintk("NFSD: purging unused open stateowner (so_id %d)\n", | |
fe0750e5 BF |
3055 | oo->oo_owner.so_id); |
3056 | release_openowner(oo); | |
1da177e4 LT |
3057 | } |
3058 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
3059 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
3060 | nfs4_unlock_state(); | |
3061 | return clientid_val; | |
3062 | } | |
3063 | ||
a254b246 HH |
3064 | static struct workqueue_struct *laundry_wq; |
3065 | static void laundromat_main(struct work_struct *); | |
3066 | static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); | |
3067 | ||
3068 | static void | |
c4028958 | 3069 | laundromat_main(struct work_struct *not_used) |
1da177e4 LT |
3070 | { |
3071 | time_t t; | |
3072 | ||
3073 | t = nfs4_laundromat(); | |
3074 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); | |
58da282b | 3075 | queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); |
1da177e4 LT |
3076 | } |
3077 | ||
fe0750e5 | 3078 | static struct nfs4_openowner * search_close_lru(u32 st_id) |
f8816512 | 3079 | { |
fe0750e5 | 3080 | struct nfs4_openowner *local; |
1da177e4 | 3081 | |
fe0750e5 BF |
3082 | list_for_each_entry(local, &close_lru, oo_close_lru) { |
3083 | if (local->oo_owner.so_id == st_id) | |
f4dee24c | 3084 | return local; |
1da177e4 LT |
3085 | } |
3086 | return NULL; | |
3087 | } | |
3088 | ||
3089 | static inline int | |
3090 | nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) | |
3091 | { | |
f9d7562f | 3092 | return fhp->fh_dentry->d_inode != stp->st_file->fi_inode; |
1da177e4 LT |
3093 | } |
3094 | ||
3095 | static int | |
3096 | STALE_STATEID(stateid_t *stateid) | |
3097 | { | |
e4e83ea4 BF |
3098 | if (stateid->si_boot == boot_time) |
3099 | return 0; | |
3100 | dprintk("NFSD: stale stateid " STATEID_FMT "!\n", | |
8c10cbdb | 3101 | STATEID_VAL(stateid)); |
e4e83ea4 | 3102 | return 1; |
1da177e4 LT |
3103 | } |
3104 | ||
3105 | static inline int | |
3106 | access_permit_read(unsigned long access_bmap) | |
3107 | { | |
3108 | return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || | |
3109 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || | |
3110 | test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); | |
3111 | } | |
3112 | ||
3113 | static inline int | |
3114 | access_permit_write(unsigned long access_bmap) | |
3115 | { | |
3116 | return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || | |
3117 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); | |
3118 | } | |
3119 | ||
3120 | static | |
b37ad28b | 3121 | __be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags) |
1da177e4 | 3122 | { |
b37ad28b | 3123 | __be32 status = nfserr_openmode; |
1da177e4 | 3124 | |
02921914 BF |
3125 | /* For lock stateid's, we test the parent open, not the lock: */ |
3126 | if (stp->st_openstp) | |
3127 | stp = stp->st_openstp; | |
1da177e4 LT |
3128 | if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) |
3129 | goto out; | |
3130 | if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) | |
3131 | goto out; | |
3132 | status = nfs_ok; | |
3133 | out: | |
3134 | return status; | |
3135 | } | |
3136 | ||
b37ad28b | 3137 | static inline __be32 |
1da177e4 LT |
3138 | check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) |
3139 | { | |
203a8c8e | 3140 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 3141 | return nfs_ok; |
af558e33 | 3142 | else if (locks_in_grace()) { |
25985edc | 3143 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
3144 | * conflicting state; so we must wait out the grace period. */ |
3145 | return nfserr_grace; | |
3146 | } else if (flags & WR_STATE) | |
3147 | return nfs4_share_conflict(current_fh, | |
3148 | NFS4_SHARE_DENY_WRITE); | |
3149 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
3150 | return nfs4_share_conflict(current_fh, | |
3151 | NFS4_SHARE_DENY_READ); | |
3152 | } | |
3153 | ||
3154 | /* | |
3155 | * Allow READ/WRITE during grace period on recovered state only for files | |
3156 | * that are not able to provide mandatory locking. | |
3157 | */ | |
3158 | static inline int | |
18f82731 | 3159 | grace_disallows_io(struct inode *inode) |
1da177e4 | 3160 | { |
203a8c8e | 3161 | return locks_in_grace() && mandatory_lock(inode); |
1da177e4 LT |
3162 | } |
3163 | ||
81b82965 BF |
3164 | /* Returns true iff a is later than b: */ |
3165 | static bool stateid_generation_after(stateid_t *a, stateid_t *b) | |
3166 | { | |
3167 | return (s32)a->si_generation - (s32)b->si_generation > 0; | |
3168 | } | |
3169 | ||
28dde241 | 3170 | static int check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 3171 | { |
6668958f AA |
3172 | /* |
3173 | * When sessions are used the stateid generation number is ignored | |
3174 | * when it is zero. | |
3175 | */ | |
28dde241 | 3176 | if (has_session && in->si_generation == 0) |
81b82965 BF |
3177 | return nfs_ok; |
3178 | ||
3179 | if (in->si_generation == ref->si_generation) | |
3180 | return nfs_ok; | |
6668958f | 3181 | |
0836f587 | 3182 | /* If the client sends us a stateid from the future, it's buggy: */ |
81b82965 | 3183 | if (stateid_generation_after(in, ref)) |
0836f587 BF |
3184 | return nfserr_bad_stateid; |
3185 | /* | |
81b82965 BF |
3186 | * However, we could see a stateid from the past, even from a |
3187 | * non-buggy client. For example, if the client sends a lock | |
3188 | * while some IO is outstanding, the lock may bump si_generation | |
3189 | * while the IO is still in flight. The client could avoid that | |
3190 | * situation by waiting for responses on all the IO requests, | |
3191 | * but better performance may result in retrying IO that | |
3192 | * receives an old_stateid error if requests are rarely | |
3193 | * reordered in flight: | |
0836f587 | 3194 | */ |
81b82965 | 3195 | return nfserr_old_stateid; |
0836f587 BF |
3196 | } |
3197 | ||
3e633079 BF |
3198 | static int is_delegation_stateid(stateid_t *stateid) |
3199 | { | |
3200 | return stateid->si_fileid == 0; | |
3201 | } | |
3202 | ||
28dde241 | 3203 | __be32 nfs4_validate_stateid(stateid_t *stateid, bool has_session) |
17456804 BS |
3204 | { |
3205 | struct nfs4_stateid *stp = NULL; | |
3206 | __be32 status = nfserr_stale_stateid; | |
3207 | ||
3208 | if (STALE_STATEID(stateid)) | |
3209 | goto out; | |
3210 | ||
3211 | status = nfserr_expired; | |
b79abadd | 3212 | stp = find_stateid(stateid, 0); |
17456804 BS |
3213 | if (!stp) |
3214 | goto out; | |
3215 | status = nfserr_bad_stateid; | |
3216 | ||
fe0750e5 BF |
3217 | if (stp->st_stateowner->so_is_open_owner |
3218 | && !openowner(stp->st_stateowner)->oo_confirmed) | |
17456804 BS |
3219 | goto out; |
3220 | ||
28dde241 | 3221 | status = check_stateid_generation(stateid, &stp->st_stateid, has_session); |
17456804 BS |
3222 | if (status) |
3223 | goto out; | |
3224 | ||
3225 | status = nfs_ok; | |
3226 | out: | |
3227 | return status; | |
3228 | } | |
3229 | ||
1da177e4 LT |
3230 | /* |
3231 | * Checks for stateid operations | |
3232 | */ | |
b37ad28b | 3233 | __be32 |
dd453dfd BH |
3234 | nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, |
3235 | stateid_t *stateid, int flags, struct file **filpp) | |
1da177e4 LT |
3236 | { |
3237 | struct nfs4_stateid *stp = NULL; | |
3238 | struct nfs4_delegation *dp = NULL; | |
dd453dfd | 3239 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 3240 | struct inode *ino = current_fh->fh_dentry->d_inode; |
b37ad28b | 3241 | __be32 status; |
1da177e4 | 3242 | |
1da177e4 LT |
3243 | if (filpp) |
3244 | *filpp = NULL; | |
3245 | ||
18f82731 | 3246 | if (grace_disallows_io(ino)) |
1da177e4 LT |
3247 | return nfserr_grace; |
3248 | ||
3249 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3250 | return check_special_stateids(current_fh, stateid, flags); | |
3251 | ||
1da177e4 LT |
3252 | status = nfserr_stale_stateid; |
3253 | if (STALE_STATEID(stateid)) | |
3254 | goto out; | |
3255 | ||
33515142 BF |
3256 | /* |
3257 | * We assume that any stateid that has the current boot time, | |
3258 | * but that we can't find, is expired: | |
3259 | */ | |
3260 | status = nfserr_expired; | |
3e633079 | 3261 | if (is_delegation_stateid(stateid)) { |
a4455be0 | 3262 | dp = find_delegation_stateid(ino, stateid); |
e4e83ea4 | 3263 | if (!dp) |
1da177e4 | 3264 | goto out; |
28dde241 | 3265 | status = check_stateid_generation(stateid, &dp->dl_stateid, nfsd4_has_session(cstate)); |
0c2a498f BF |
3266 | if (status) |
3267 | goto out; | |
dc9bf700 BF |
3268 | status = nfs4_check_delegmode(dp, flags); |
3269 | if (status) | |
3270 | goto out; | |
3271 | renew_client(dp->dl_client); | |
43b0178e | 3272 | if (filpp) { |
acfdf5c3 | 3273 | *filpp = dp->dl_file->fi_deleg_file; |
43b0178e DC |
3274 | BUG_ON(!*filpp); |
3275 | } | |
1da177e4 | 3276 | } else { /* open or lock stateid */ |
a4455be0 | 3277 | stp = find_stateid(stateid, flags); |
e4e83ea4 | 3278 | if (!stp) |
1da177e4 | 3279 | goto out; |
33515142 | 3280 | status = nfserr_bad_stateid; |
6150ef0d | 3281 | if (nfs4_check_fh(current_fh, stp)) |
1da177e4 | 3282 | goto out; |
fe0750e5 BF |
3283 | if (stp->st_stateowner->so_is_open_owner |
3284 | && !openowner(stp->st_stateowner)->oo_confirmed) | |
1da177e4 | 3285 | goto out; |
6668958f | 3286 | status = check_stateid_generation(stateid, &stp->st_stateid, |
28dde241 | 3287 | nfsd4_has_session(cstate)); |
0c2a498f BF |
3288 | if (status) |
3289 | goto out; | |
a4455be0 BF |
3290 | status = nfs4_check_openmode(stp, flags); |
3291 | if (status) | |
1da177e4 LT |
3292 | goto out; |
3293 | renew_client(stp->st_stateowner->so_client); | |
f9d7562f BF |
3294 | if (filpp) { |
3295 | if (flags & RD_STATE) | |
3296 | *filpp = find_readable_file(stp->st_file); | |
3297 | else | |
3298 | *filpp = find_writeable_file(stp->st_file); | |
f9d7562f | 3299 | } |
1da177e4 LT |
3300 | } |
3301 | status = nfs_ok; | |
3302 | out: | |
3303 | return status; | |
3304 | } | |
3305 | ||
e1ca12df BS |
3306 | static __be32 |
3307 | nfsd4_free_delegation_stateid(stateid_t *stateid) | |
3308 | { | |
3309 | struct nfs4_delegation *dp = search_for_delegation(stateid); | |
3310 | if (dp) | |
3311 | return nfserr_locks_held; | |
3312 | return nfserr_bad_stateid; | |
3313 | } | |
3314 | ||
3315 | static __be32 | |
3316 | nfsd4_free_lock_stateid(struct nfs4_stateid *stp) | |
3317 | { | |
fe0750e5 | 3318 | if (check_for_locks(stp->st_file, lockowner(stp->st_stateowner))) |
e1ca12df BS |
3319 | return nfserr_locks_held; |
3320 | release_lock_stateid(stp); | |
3321 | return nfs_ok; | |
3322 | } | |
3323 | ||
17456804 BS |
3324 | /* |
3325 | * Test if the stateid is valid | |
3326 | */ | |
3327 | __be32 | |
3328 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3329 | struct nfsd4_test_stateid *test_stateid) | |
3330 | { | |
3331 | test_stateid->ts_has_session = nfsd4_has_session(cstate); | |
3332 | return nfs_ok; | |
3333 | } | |
3334 | ||
e1ca12df BS |
3335 | /* |
3336 | * Free a state id | |
3337 | */ | |
3338 | __be32 | |
3339 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3340 | struct nfsd4_free_stateid *free_stateid) | |
3341 | { | |
3342 | stateid_t *stateid = &free_stateid->fr_stateid; | |
3343 | struct nfs4_stateid *stp; | |
3344 | __be32 ret; | |
3345 | ||
3346 | nfs4_lock_state(); | |
3347 | if (is_delegation_stateid(stateid)) { | |
3348 | ret = nfsd4_free_delegation_stateid(stateid); | |
3349 | goto out; | |
3350 | } | |
3351 | ||
b79abadd | 3352 | stp = find_stateid(stateid, 0); |
e1ca12df BS |
3353 | if (!stp) { |
3354 | ret = nfserr_bad_stateid; | |
3355 | goto out; | |
3356 | } | |
81b82965 BF |
3357 | ret = check_stateid_generation(stateid, &stp->st_stateid, 1); |
3358 | if (ret) | |
3359 | goto out; | |
e1ca12df | 3360 | |
5fa0bbb4 | 3361 | if (stp->st_type == NFS4_OPEN_STID) { |
e1ca12df BS |
3362 | ret = nfserr_locks_held; |
3363 | goto out; | |
3364 | } else { | |
3365 | ret = nfsd4_free_lock_stateid(stp); | |
3366 | goto out; | |
3367 | } | |
3368 | ||
3369 | out: | |
3370 | nfs4_unlock_state(); | |
3371 | return ret; | |
3372 | } | |
3373 | ||
4c4cd222 N |
3374 | static inline int |
3375 | setlkflg (int type) | |
3376 | { | |
3377 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
3378 | RD_STATE : WR_STATE; | |
3379 | } | |
1da177e4 LT |
3380 | |
3381 | /* | |
3382 | * Checks for sequence id mutating operations. | |
3383 | */ | |
b37ad28b | 3384 | static __be32 |
dd453dfd BH |
3385 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
3386 | stateid_t *stateid, int flags, | |
b34f27aa | 3387 | struct nfs4_stateid **stpp) |
1da177e4 | 3388 | { |
1da177e4 | 3389 | struct nfs4_stateowner *sop; |
dd453dfd | 3390 | struct svc_fh *current_fh = &cstate->current_fh; |
0836f587 | 3391 | __be32 status; |
1da177e4 | 3392 | |
8c10cbdb BH |
3393 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
3394 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 3395 | |
1da177e4 | 3396 | *stpp = NULL; |
1da177e4 | 3397 | |
1da177e4 | 3398 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { |
2fdada03 | 3399 | dprintk("NFSD: preprocess_seqid_op: magic stateid!\n"); |
3a4f98bb | 3400 | return nfserr_bad_stateid; |
1da177e4 LT |
3401 | } |
3402 | ||
1da177e4 | 3403 | if (STALE_STATEID(stateid)) |
3a4f98bb | 3404 | return nfserr_stale_stateid; |
6668958f | 3405 | |
1da177e4 LT |
3406 | /* |
3407 | * We return BAD_STATEID if filehandle doesn't match stateid, | |
3408 | * the confirmed flag is incorrecly set, or the generation | |
3409 | * number is incorrect. | |
1da177e4 | 3410 | */ |
f4dee24c BF |
3411 | *stpp = find_stateid(stateid, flags); |
3412 | if (*stpp == NULL) | |
3413 | return nfserr_expired; | |
1da177e4 | 3414 | |
f4dee24c | 3415 | sop = (*stpp)->st_stateowner; |
f3e42237 | 3416 | cstate->replay_owner = sop; |
39325bd0 | 3417 | |
f4dee24c | 3418 | if (nfs4_check_fh(current_fh, *stpp)) { |
2fdada03 | 3419 | dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); |
3a4f98bb | 3420 | return nfserr_bad_stateid; |
1da177e4 LT |
3421 | } |
3422 | ||
7a8711c9 BF |
3423 | status = nfsd4_check_seqid(cstate, sop, seqid); |
3424 | if (status) | |
3425 | return status; | |
1da177e4 | 3426 | |
fe0750e5 BF |
3427 | if (sop->so_is_open_owner && !openowner(sop)->oo_confirmed |
3428 | && !(flags & CONFIRM)) { | |
2fdada03 | 3429 | dprintk("NFSD: preprocess_seqid_op: stateowner not" |
3a4f98bb N |
3430 | " confirmed yet!\n"); |
3431 | return nfserr_bad_stateid; | |
1da177e4 | 3432 | } |
f4dee24c | 3433 | status = check_stateid_generation(stateid, &(*stpp)->st_stateid, nfsd4_has_session(cstate)); |
0836f587 BF |
3434 | if (status) |
3435 | return status; | |
52fd004e | 3436 | renew_client(sop->so_client); |
3a4f98bb | 3437 | return nfs_ok; |
1da177e4 LT |
3438 | } |
3439 | ||
b37ad28b | 3440 | __be32 |
ca364317 | 3441 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3442 | struct nfsd4_open_confirm *oc) |
1da177e4 | 3443 | { |
b37ad28b | 3444 | __be32 status; |
fe0750e5 | 3445 | struct nfs4_openowner *oo; |
1da177e4 LT |
3446 | struct nfs4_stateid *stp; |
3447 | ||
3448 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | |
ca364317 BF |
3449 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3450 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3451 | |
ca364317 | 3452 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
3453 | if (status) |
3454 | return status; | |
1da177e4 LT |
3455 | |
3456 | nfs4_lock_state(); | |
3457 | ||
9072d5c6 | 3458 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3459 | oc->oc_seqid, &oc->oc_req_stateid, |
9072d5c6 BF |
3460 | CONFIRM | OPEN_STATE, &stp); |
3461 | if (status) | |
68b66e82 | 3462 | goto out; |
fe0750e5 | 3463 | oo = openowner(stp->st_stateowner); |
68b66e82 | 3464 | status = nfserr_bad_stateid; |
fe0750e5 | 3465 | if (oo->oo_confirmed) |
68b66e82 | 3466 | goto out; |
fe0750e5 | 3467 | oo->oo_confirmed = 1; |
1da177e4 LT |
3468 | update_stateid(&stp->st_stateid); |
3469 | memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
8c10cbdb BH |
3470 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
3471 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stateid)); | |
c7b9a459 | 3472 | |
fe0750e5 | 3473 | nfsd4_create_clid_dir(oo->oo_owner.so_client); |
68b66e82 | 3474 | status = nfs_ok; |
1da177e4 | 3475 | out: |
5ec094c1 BF |
3476 | if (!cstate->replay_owner) |
3477 | nfs4_unlock_state(); | |
1da177e4 LT |
3478 | return status; |
3479 | } | |
3480 | ||
f197c271 | 3481 | static inline void nfs4_file_downgrade(struct nfs4_stateid *stp, unsigned int to_access) |
1da177e4 LT |
3482 | { |
3483 | int i; | |
f197c271 | 3484 | |
1da177e4 | 3485 | for (i = 1; i < 4; i++) { |
f197c271 BF |
3486 | if (test_bit(i, &stp->st_access_bmap) && !(i & to_access)) { |
3487 | nfs4_file_put_access(stp->st_file, i); | |
3488 | __clear_bit(i, &stp->st_access_bmap); | |
3489 | } | |
1da177e4 LT |
3490 | } |
3491 | } | |
3492 | ||
3493 | static void | |
3494 | reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) | |
3495 | { | |
3496 | int i; | |
3497 | for (i = 0; i < 4; i++) { | |
3498 | if ((i & deny) != i) | |
3499 | __clear_bit(i, bmap); | |
3500 | } | |
3501 | } | |
3502 | ||
b37ad28b | 3503 | __be32 |
ca364317 BF |
3504 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
3505 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 3506 | struct nfsd4_open_downgrade *od) |
1da177e4 | 3507 | { |
b37ad28b | 3508 | __be32 status; |
1da177e4 | 3509 | struct nfs4_stateid *stp; |
1da177e4 LT |
3510 | |
3511 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | |
ca364317 BF |
3512 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3513 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3514 | |
d87a8ade | 3515 | if (!access_valid(od->od_share_access, cstate->minorversion) |
ba5a6a19 | 3516 | || !deny_valid(od->od_share_deny)) |
1da177e4 LT |
3517 | return nfserr_inval; |
3518 | ||
3519 | nfs4_lock_state(); | |
9072d5c6 BF |
3520 | status = nfs4_preprocess_seqid_op(cstate, od->od_seqid, |
3521 | &od->od_stateid, OPEN_STATE, &stp); | |
3522 | if (status) | |
1da177e4 | 3523 | goto out; |
1da177e4 LT |
3524 | status = nfserr_inval; |
3525 | if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { | |
3526 | dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
3527 | stp->st_access_bmap, od->od_share_access); | |
3528 | goto out; | |
3529 | } | |
3530 | if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { | |
3531 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", | |
3532 | stp->st_deny_bmap, od->od_share_deny); | |
3533 | goto out; | |
3534 | } | |
f197c271 | 3535 | nfs4_file_downgrade(stp, od->od_share_access); |
1da177e4 | 3536 | |
1da177e4 LT |
3537 | reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); |
3538 | ||
3539 | update_stateid(&stp->st_stateid); | |
3540 | memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
3541 | status = nfs_ok; | |
3542 | out: | |
5ec094c1 BF |
3543 | if (!cstate->replay_owner) |
3544 | nfs4_unlock_state(); | |
1da177e4 LT |
3545 | return status; |
3546 | } | |
3547 | ||
3548 | /* | |
3549 | * nfs4_unlock_state() called after encode | |
3550 | */ | |
b37ad28b | 3551 | __be32 |
ca364317 | 3552 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3553 | struct nfsd4_close *close) |
1da177e4 | 3554 | { |
b37ad28b | 3555 | __be32 status; |
fe0750e5 | 3556 | struct nfs4_openowner *oo; |
1da177e4 LT |
3557 | struct nfs4_stateid *stp; |
3558 | ||
3559 | dprintk("NFSD: nfsd4_close on file %.*s\n", | |
ca364317 BF |
3560 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3561 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 LT |
3562 | |
3563 | nfs4_lock_state(); | |
3564 | /* check close_lru for replay */ | |
9072d5c6 | 3565 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
1da177e4 | 3566 | &close->cl_stateid, |
f4dee24c BF |
3567 | OPEN_STATE, &stp); |
3568 | if (stp == NULL && status == nfserr_expired) { | |
3569 | /* | |
3570 | * Also, we should make sure this isn't just the result of | |
3571 | * a replayed close: | |
3572 | */ | |
fe0750e5 | 3573 | oo = search_close_lru(close->cl_stateid.si_stateownerid); |
f4dee24c | 3574 | /* It's not stale; let's assume it's expired: */ |
fe0750e5 | 3575 | if (oo == NULL) |
f4dee24c | 3576 | goto out; |
fe0750e5 BF |
3577 | cstate->replay_owner = &oo->oo_owner; |
3578 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, close->cl_seqid); | |
f4dee24c BF |
3579 | if (status) |
3580 | goto out; | |
3581 | status = nfserr_bad_seqid; | |
3582 | } | |
9072d5c6 | 3583 | if (status) |
1da177e4 | 3584 | goto out; |
fe0750e5 | 3585 | oo = openowner(stp->st_stateowner); |
1da177e4 LT |
3586 | status = nfs_ok; |
3587 | update_stateid(&stp->st_stateid); | |
3588 | memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
3589 | ||
04ef5954 | 3590 | /* release_stateid() calls nfsd_close() if needed */ |
2283963f | 3591 | release_open_stateid(stp); |
04ef5954 BF |
3592 | |
3593 | /* place unused nfs4_stateowners on so_close_lru list to be | |
3594 | * released by the laundromat service after the lease period | |
3595 | * to enable us to handle CLOSE replay | |
3596 | */ | |
fe0750e5 BF |
3597 | if (list_empty(&oo->oo_owner.so_stateids)) |
3598 | move_to_close_lru(oo); | |
1da177e4 | 3599 | out: |
5ec094c1 BF |
3600 | if (!cstate->replay_owner) |
3601 | nfs4_unlock_state(); | |
1da177e4 LT |
3602 | return status; |
3603 | } | |
3604 | ||
b37ad28b | 3605 | __be32 |
ca364317 BF |
3606 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3607 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 3608 | { |
203a8c8e BF |
3609 | struct nfs4_delegation *dp; |
3610 | stateid_t *stateid = &dr->dr_stateid; | |
3611 | struct inode *inode; | |
b37ad28b | 3612 | __be32 status; |
1da177e4 | 3613 | |
ca364317 | 3614 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e BF |
3615 | return status; |
3616 | inode = cstate->current_fh.fh_dentry->d_inode; | |
1da177e4 LT |
3617 | |
3618 | nfs4_lock_state(); | |
203a8c8e BF |
3619 | status = nfserr_bad_stateid; |
3620 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3621 | goto out; | |
3622 | status = nfserr_stale_stateid; | |
3623 | if (STALE_STATEID(stateid)) | |
3624 | goto out; | |
7e0f7cf5 | 3625 | status = nfserr_bad_stateid; |
203a8c8e BF |
3626 | if (!is_delegation_stateid(stateid)) |
3627 | goto out; | |
33515142 | 3628 | status = nfserr_expired; |
203a8c8e | 3629 | dp = find_delegation_stateid(inode, stateid); |
e4e83ea4 | 3630 | if (!dp) |
203a8c8e | 3631 | goto out; |
28dde241 | 3632 | status = check_stateid_generation(stateid, &dp->dl_stateid, nfsd4_has_session(cstate)); |
203a8c8e BF |
3633 | if (status) |
3634 | goto out; | |
3635 | renew_client(dp->dl_client); | |
3636 | ||
3637 | unhash_delegation(dp); | |
1da177e4 | 3638 | out: |
203a8c8e BF |
3639 | nfs4_unlock_state(); |
3640 | ||
1da177e4 LT |
3641 | return status; |
3642 | } | |
3643 | ||
3644 | ||
3645 | /* | |
3646 | * Lock owner state (byte-range locks) | |
3647 | */ | |
3648 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) | |
3649 | #define LOCK_HASH_BITS 8 | |
3650 | #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) | |
3651 | #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) | |
3652 | ||
87df4de8 BH |
3653 | static inline u64 |
3654 | end_offset(u64 start, u64 len) | |
3655 | { | |
3656 | u64 end; | |
3657 | ||
3658 | end = start + len; | |
3659 | return end >= start ? end: NFS4_MAX_UINT64; | |
3660 | } | |
3661 | ||
3662 | /* last octet in a range */ | |
3663 | static inline u64 | |
3664 | last_byte_offset(u64 start, u64 len) | |
3665 | { | |
3666 | u64 end; | |
3667 | ||
3668 | BUG_ON(!len); | |
3669 | end = start + len; | |
3670 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
3671 | } | |
3672 | ||
ddc04c41 BF |
3673 | static unsigned int lockownerid_hashval(u32 id) |
3674 | { | |
3675 | return id & LOCK_HASH_MASK; | |
3676 | } | |
1da177e4 LT |
3677 | |
3678 | static inline unsigned int | |
3679 | lock_ownerstr_hashval(struct inode *inode, u32 cl_id, | |
3680 | struct xdr_netobj *ownername) | |
3681 | { | |
3682 | return (file_hashval(inode) + cl_id | |
3683 | + opaque_hashval(ownername->data, ownername->len)) | |
3684 | & LOCK_HASH_MASK; | |
3685 | } | |
3686 | ||
3687 | static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; | |
3688 | static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; | |
1da177e4 | 3689 | |
e1ca12df BS |
3690 | static int |
3691 | same_stateid(stateid_t *id_one, stateid_t *id_two) | |
3692 | { | |
3693 | if (id_one->si_stateownerid != id_two->si_stateownerid) | |
3694 | return 0; | |
3695 | return id_one->si_fileid == id_two->si_fileid; | |
3696 | } | |
3697 | ||
b79abadd | 3698 | static struct nfs4_stateid *find_stateid(stateid_t *t, int flags) |
1da177e4 | 3699 | { |
b79abadd | 3700 | struct nfs4_stateid *s; |
1da177e4 LT |
3701 | unsigned int hashval; |
3702 | ||
b79abadd BF |
3703 | hashval = stateid_hashval(t->si_stateownerid, t->si_fileid); |
3704 | list_for_each_entry(s, &stateid_hashtbl[hashval], st_hash) { | |
3705 | if (!same_stateid(&s->st_stateid, t)) | |
3706 | continue; | |
3707 | if (flags & LOCK_STATE && s->st_type != NFS4_LOCK_STID) | |
3708 | return NULL; | |
3709 | if (flags & OPEN_STATE && s->st_type != NFS4_OPEN_STID) | |
3710 | return NULL; | |
3711 | return s; | |
1da177e4 | 3712 | } |
e1ca12df BS |
3713 | return NULL; |
3714 | } | |
3715 | ||
3716 | static struct nfs4_delegation * | |
3717 | search_for_delegation(stateid_t *stid) | |
3718 | { | |
3719 | struct nfs4_file *fp; | |
3720 | struct nfs4_delegation *dp; | |
3721 | struct list_head *pos; | |
3722 | int i; | |
3723 | ||
3724 | for (i = 0; i < FILE_HASH_SIZE; i++) { | |
3725 | list_for_each_entry(fp, &file_hashtbl[i], fi_hash) { | |
3726 | list_for_each(pos, &fp->fi_delegations) { | |
3727 | dp = list_entry(pos, struct nfs4_delegation, dl_perfile); | |
3728 | if (same_stateid(&dp->dl_stateid, stid)) | |
3729 | return dp; | |
3730 | } | |
3731 | } | |
3732 | } | |
3733 | return NULL; | |
3734 | } | |
3735 | ||
1da177e4 LT |
3736 | static struct nfs4_delegation * |
3737 | find_delegation_stateid(struct inode *ino, stateid_t *stid) | |
3738 | { | |
13cd2184 N |
3739 | struct nfs4_file *fp; |
3740 | struct nfs4_delegation *dl; | |
1da177e4 | 3741 | |
8c10cbdb BH |
3742 | dprintk("NFSD: %s: stateid=" STATEID_FMT "\n", __func__, |
3743 | STATEID_VAL(stid)); | |
1da177e4 | 3744 | |
1da177e4 | 3745 | fp = find_file(ino); |
13cd2184 N |
3746 | if (!fp) |
3747 | return NULL; | |
3748 | dl = find_delegation_file(fp, stid); | |
3749 | put_nfs4_file(fp); | |
3750 | return dl; | |
1da177e4 LT |
3751 | } |
3752 | ||
3753 | /* | |
3754 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
3755 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
3756 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
3757 | * locking, this prevents us from being completely protocol-compliant. The | |
3758 | * real solution to this problem is to start using unsigned file offsets in | |
3759 | * the VFS, but this is a very deep change! | |
3760 | */ | |
3761 | static inline void | |
3762 | nfs4_transform_lock_offset(struct file_lock *lock) | |
3763 | { | |
3764 | if (lock->fl_start < 0) | |
3765 | lock->fl_start = OFFSET_MAX; | |
3766 | if (lock->fl_end < 0) | |
3767 | lock->fl_end = OFFSET_MAX; | |
3768 | } | |
3769 | ||
d5b9026a N |
3770 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
3771 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 3772 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 3773 | }; |
1da177e4 LT |
3774 | |
3775 | static inline void | |
3776 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
3777 | { | |
fe0750e5 | 3778 | struct nfs4_lockowner *lo; |
1da177e4 | 3779 | |
d5b9026a | 3780 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 BF |
3781 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
3782 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, | |
3783 | lo->lo_owner.so_owner.len, GFP_KERNEL); | |
7c13f344 BF |
3784 | if (!deny->ld_owner.data) |
3785 | /* We just don't care that much */ | |
3786 | goto nevermind; | |
fe0750e5 BF |
3787 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
3788 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; | |
d5b9026a | 3789 | } else { |
7c13f344 BF |
3790 | nevermind: |
3791 | deny->ld_owner.len = 0; | |
3792 | deny->ld_owner.data = NULL; | |
d5b9026a N |
3793 | deny->ld_clientid.cl_boot = 0; |
3794 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
3795 | } |
3796 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
3797 | deny->ld_length = NFS4_MAX_UINT64; |
3798 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
3799 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
3800 | deny->ld_type = NFS4_READ_LT; | |
3801 | if (fl->fl_type != F_RDLCK) | |
3802 | deny->ld_type = NFS4_WRITE_LT; | |
3803 | } | |
3804 | ||
fe0750e5 BF |
3805 | static struct nfs4_lockowner * |
3806 | find_lockowner_str(struct inode *inode, clientid_t *clid, | |
1da177e4 LT |
3807 | struct xdr_netobj *owner) |
3808 | { | |
3809 | unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); | |
3810 | struct nfs4_stateowner *op; | |
3811 | ||
3812 | list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { | |
599e0a22 | 3813 | if (same_owner_str(op, owner, clid)) |
fe0750e5 | 3814 | return lockowner(op); |
1da177e4 LT |
3815 | } |
3816 | return NULL; | |
3817 | } | |
3818 | ||
fe0750e5 | 3819 | static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp) |
ff194bd9 BF |
3820 | { |
3821 | unsigned int idhashval; | |
3822 | ||
fe0750e5 BF |
3823 | idhashval = lockownerid_hashval(lo->lo_owner.so_id); |
3824 | list_add(&lo->lo_owner.so_idhash, &lock_ownerid_hashtbl[idhashval]); | |
3825 | list_add(&lo->lo_owner.so_strhash, &lock_ownerstr_hashtbl[strhashval]); | |
3826 | list_add(&lo->lo_perstateid, &open_stp->st_lockowners); | |
ff194bd9 BF |
3827 | } |
3828 | ||
1da177e4 LT |
3829 | /* |
3830 | * Alloc a lock owner structure. | |
3831 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 3832 | * occurred. |
1da177e4 LT |
3833 | * |
3834 | * strhashval = lock_ownerstr_hashval | |
1da177e4 LT |
3835 | */ |
3836 | ||
fe0750e5 | 3837 | static struct nfs4_lockowner * |
1da177e4 | 3838 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { |
fe0750e5 | 3839 | struct nfs4_lockowner *lo; |
1da177e4 | 3840 | |
fe0750e5 BF |
3841 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
3842 | if (!lo) | |
1da177e4 | 3843 | return NULL; |
fe0750e5 BF |
3844 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
3845 | lo->lo_owner.so_is_open_owner = 0; | |
b59e3c0e NB |
3846 | /* It is the openowner seqid that will be incremented in encode in the |
3847 | * case of new lockowners; so increment the lock seqid manually: */ | |
fe0750e5 BF |
3848 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; |
3849 | hash_lockowner(lo, strhashval, clp, open_stp); | |
3850 | return lo; | |
1da177e4 LT |
3851 | } |
3852 | ||
fd39ca9a | 3853 | static struct nfs4_stateid * |
fe0750e5 | 3854 | alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_stateid *open_stp) |
1da177e4 LT |
3855 | { |
3856 | struct nfs4_stateid *stp; | |
fe0750e5 | 3857 | unsigned int hashval = stateid_hashval(lo->lo_owner.so_id, fp->fi_id); |
1da177e4 | 3858 | |
5ac049ac N |
3859 | stp = nfs4_alloc_stateid(); |
3860 | if (stp == NULL) | |
1da177e4 LT |
3861 | goto out; |
3862 | INIT_LIST_HEAD(&stp->st_hash); | |
3863 | INIT_LIST_HEAD(&stp->st_perfile); | |
ea1da636 N |
3864 | INIT_LIST_HEAD(&stp->st_perstateowner); |
3865 | INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ | |
b79abadd | 3866 | list_add(&stp->st_hash, &stateid_hashtbl[hashval]); |
8beefa24 | 3867 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 BF |
3868 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
3869 | stp->st_stateowner = &lo->lo_owner; | |
5fa0bbb4 | 3870 | stp->st_type = NFS4_LOCK_STID; |
13cd2184 | 3871 | get_nfs4_file(fp); |
1da177e4 | 3872 | stp->st_file = fp; |
e4e83ea4 | 3873 | stp->st_stateid.si_boot = boot_time; |
fe0750e5 | 3874 | stp->st_stateid.si_stateownerid = lo->lo_owner.so_id; |
1da177e4 | 3875 | stp->st_stateid.si_fileid = fp->fi_id; |
73997dc4 | 3876 | /* note will be incremented before first return to client: */ |
1da177e4 | 3877 | stp->st_stateid.si_generation = 0; |
0997b173 | 3878 | stp->st_access_bmap = 0; |
1da177e4 | 3879 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 3880 | stp->st_openstp = open_stp; |
1da177e4 LT |
3881 | |
3882 | out: | |
3883 | return stp; | |
3884 | } | |
3885 | ||
fd39ca9a | 3886 | static int |
1da177e4 LT |
3887 | check_lock_length(u64 offset, u64 length) |
3888 | { | |
87df4de8 | 3889 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
3890 | LOFF_OVERFLOW(offset, length))); |
3891 | } | |
3892 | ||
0997b173 BF |
3893 | static void get_lock_access(struct nfs4_stateid *lock_stp, u32 access) |
3894 | { | |
3895 | struct nfs4_file *fp = lock_stp->st_file; | |
3896 | int oflag = nfs4_access_to_omode(access); | |
3897 | ||
3898 | if (test_bit(access, &lock_stp->st_access_bmap)) | |
3899 | return; | |
3900 | nfs4_file_get_access(fp, oflag); | |
3901 | __set_bit(access, &lock_stp->st_access_bmap); | |
3902 | } | |
3903 | ||
1da177e4 LT |
3904 | /* |
3905 | * LOCK operation | |
3906 | */ | |
b37ad28b | 3907 | __be32 |
ca364317 | 3908 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3909 | struct nfsd4_lock *lock) |
1da177e4 | 3910 | { |
fe0750e5 BF |
3911 | struct nfs4_openowner *open_sop = NULL; |
3912 | struct nfs4_lockowner *lock_sop = NULL; | |
1da177e4 | 3913 | struct nfs4_stateid *lock_stp; |
7d947842 BF |
3914 | struct nfs4_file *fp; |
3915 | struct file *filp = NULL; | |
1da177e4 | 3916 | struct file_lock file_lock; |
8dc7c311 | 3917 | struct file_lock conflock; |
b37ad28b | 3918 | __be32 status = 0; |
1da177e4 | 3919 | unsigned int strhashval; |
b34f27aa | 3920 | int lkflg; |
b8dd7b9a | 3921 | int err; |
1da177e4 LT |
3922 | |
3923 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
3924 | (long long) lock->lk_offset, | |
3925 | (long long) lock->lk_length); | |
3926 | ||
1da177e4 LT |
3927 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
3928 | return nfserr_inval; | |
3929 | ||
ca364317 | 3930 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 3931 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
3932 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
3933 | return status; | |
3934 | } | |
3935 | ||
1da177e4 LT |
3936 | nfs4_lock_state(); |
3937 | ||
3938 | if (lock->lk_is_new) { | |
893f8770 N |
3939 | /* |
3940 | * Client indicates that this is a new lockowner. | |
3941 | * Use open owner and open stateid to create lock owner and | |
3942 | * lock stateid. | |
3943 | */ | |
1da177e4 | 3944 | struct nfs4_stateid *open_stp = NULL; |
1da177e4 LT |
3945 | |
3946 | status = nfserr_stale_clientid; | |
60adfc50 AA |
3947 | if (!nfsd4_has_session(cstate) && |
3948 | STALE_CLIENTID(&lock->lk_new_clientid)) | |
1da177e4 | 3949 | goto out; |
1da177e4 | 3950 | |
1da177e4 | 3951 | /* validate and update open stateid and open seqid */ |
dd453dfd | 3952 | status = nfs4_preprocess_seqid_op(cstate, |
1da177e4 LT |
3953 | lock->lk_new_open_seqid, |
3954 | &lock->lk_new_open_stateid, | |
9072d5c6 | 3955 | OPEN_STATE, &open_stp); |
37515177 | 3956 | if (status) |
1da177e4 | 3957 | goto out; |
fe0750e5 | 3958 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 3959 | status = nfserr_bad_stateid; |
b34f27aa | 3960 | if (!nfsd4_has_session(cstate) && |
fe0750e5 | 3961 | !same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
b34f27aa BF |
3962 | &lock->v.new.clientid)) |
3963 | goto out; | |
1da177e4 LT |
3964 | /* create lockowner and lock stateid */ |
3965 | fp = open_stp->st_file; | |
fe0750e5 BF |
3966 | strhashval = lock_ownerstr_hashval(fp->fi_inode, |
3967 | open_sop->oo_owner.so_client->cl_clientid.cl_id, | |
1da177e4 | 3968 | &lock->v.new.owner); |
3e9e3dbe N |
3969 | /* XXX: Do we need to check for duplicate stateowners on |
3970 | * the same file, or should they just be allowed (and | |
3971 | * create new stateids)? */ | |
3e772463 | 3972 | status = nfserr_jukebox; |
b59e3c0e | 3973 | lock_sop = alloc_init_lock_stateowner(strhashval, |
fe0750e5 | 3974 | open_sop->oo_owner.so_client, open_stp, lock); |
b59e3c0e | 3975 | if (lock_sop == NULL) |
1da177e4 | 3976 | goto out; |
b59e3c0e | 3977 | lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); |
8a280510 | 3978 | if (lock_stp == NULL) |
1da177e4 | 3979 | goto out; |
1da177e4 LT |
3980 | } else { |
3981 | /* lock (lock owner + lock stateid) already exists */ | |
dd453dfd | 3982 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
3983 | lock->lk_old_lock_seqid, |
3984 | &lock->lk_old_lock_stateid, | |
9072d5c6 | 3985 | LOCK_STATE, &lock_stp); |
1da177e4 LT |
3986 | if (status) |
3987 | goto out; | |
fe0750e5 | 3988 | lock_sop = lockowner(lock_stp->st_stateowner); |
7d947842 | 3989 | fp = lock_stp->st_file; |
1da177e4 | 3990 | } |
9072d5c6 | 3991 | /* lock_sop and lock_stp have been created or found */ |
1da177e4 | 3992 | |
b34f27aa BF |
3993 | lkflg = setlkflg(lock->lk_type); |
3994 | status = nfs4_check_openmode(lock_stp, lkflg); | |
3995 | if (status) | |
3996 | goto out; | |
3997 | ||
0dd395dc | 3998 | status = nfserr_grace; |
af558e33 | 3999 | if (locks_in_grace() && !lock->lk_reclaim) |
0dd395dc N |
4000 | goto out; |
4001 | status = nfserr_no_grace; | |
af558e33 | 4002 | if (!locks_in_grace() && lock->lk_reclaim) |
0dd395dc N |
4003 | goto out; |
4004 | ||
1da177e4 LT |
4005 | locks_init_lock(&file_lock); |
4006 | switch (lock->lk_type) { | |
4007 | case NFS4_READ_LT: | |
4008 | case NFS4_READW_LT: | |
0997b173 BF |
4009 | filp = find_readable_file(lock_stp->st_file); |
4010 | if (filp) | |
4011 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
1da177e4 | 4012 | file_lock.fl_type = F_RDLCK; |
529d7b2a | 4013 | break; |
1da177e4 LT |
4014 | case NFS4_WRITE_LT: |
4015 | case NFS4_WRITEW_LT: | |
0997b173 BF |
4016 | filp = find_writeable_file(lock_stp->st_file); |
4017 | if (filp) | |
4018 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
1da177e4 | 4019 | file_lock.fl_type = F_WRLCK; |
529d7b2a | 4020 | break; |
1da177e4 LT |
4021 | default: |
4022 | status = nfserr_inval; | |
4023 | goto out; | |
4024 | } | |
f9d7562f BF |
4025 | if (!filp) { |
4026 | status = nfserr_openmode; | |
4027 | goto out; | |
4028 | } | |
b59e3c0e | 4029 | file_lock.fl_owner = (fl_owner_t)lock_sop; |
1da177e4 LT |
4030 | file_lock.fl_pid = current->tgid; |
4031 | file_lock.fl_file = filp; | |
4032 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 4033 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
4034 | |
4035 | file_lock.fl_start = lock->lk_offset; | |
87df4de8 | 4036 | file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); |
1da177e4 LT |
4037 | nfs4_transform_lock_offset(&file_lock); |
4038 | ||
4039 | /* | |
4040 | * Try to lock the file in the VFS. | |
4041 | * Note: locks.c uses the BKL to protect the inode's lock list. | |
4042 | */ | |
4043 | ||
529d7b2a | 4044 | err = vfs_lock_file(filp, F_SETLK, &file_lock, &conflock); |
b8dd7b9a | 4045 | switch (-err) { |
1da177e4 LT |
4046 | case 0: /* success! */ |
4047 | update_stateid(&lock_stp->st_stateid); | |
4048 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, | |
4049 | sizeof(stateid_t)); | |
b8dd7b9a | 4050 | status = 0; |
eb76b3fd AA |
4051 | break; |
4052 | case (EAGAIN): /* conflock holds conflicting lock */ | |
4053 | status = nfserr_denied; | |
4054 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
4055 | nfs4_set_lock_denied(&conflock, &lock->lk_denied); | |
4056 | break; | |
1da177e4 LT |
4057 | case (EDEADLK): |
4058 | status = nfserr_deadlock; | |
eb76b3fd | 4059 | break; |
3e772463 | 4060 | default: |
fd85b817 | 4061 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 4062 | status = nfserrno(err); |
eb76b3fd | 4063 | break; |
1da177e4 | 4064 | } |
1da177e4 | 4065 | out: |
8a280510 | 4066 | if (status && lock->lk_is_new && lock_sop) |
f044ff83 | 4067 | release_lockowner(lock_sop); |
5ec094c1 BF |
4068 | if (!cstate->replay_owner) |
4069 | nfs4_unlock_state(); | |
1da177e4 LT |
4070 | return status; |
4071 | } | |
4072 | ||
55ef1274 BF |
4073 | /* |
4074 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
4075 | * so we do a temporary open here just to get an open file to pass to | |
4076 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
4077 | * inode operation.) | |
4078 | */ | |
4079 | static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) | |
4080 | { | |
4081 | struct file *file; | |
4082 | int err; | |
4083 | ||
4084 | err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); | |
4085 | if (err) | |
4086 | return err; | |
4087 | err = vfs_test_lock(file, lock); | |
4088 | nfsd_close(file); | |
4089 | return err; | |
4090 | } | |
4091 | ||
1da177e4 LT |
4092 | /* |
4093 | * LOCKT operation | |
4094 | */ | |
b37ad28b | 4095 | __be32 |
ca364317 BF |
4096 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4097 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
4098 | { |
4099 | struct inode *inode; | |
1da177e4 | 4100 | struct file_lock file_lock; |
fe0750e5 | 4101 | struct nfs4_lockowner *lo; |
fd85b817 | 4102 | int error; |
b37ad28b | 4103 | __be32 status; |
1da177e4 | 4104 | |
af558e33 | 4105 | if (locks_in_grace()) |
1da177e4 LT |
4106 | return nfserr_grace; |
4107 | ||
4108 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
4109 | return nfserr_inval; | |
4110 | ||
1da177e4 LT |
4111 | nfs4_lock_state(); |
4112 | ||
4113 | status = nfserr_stale_clientid; | |
60adfc50 | 4114 | if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) |
1da177e4 | 4115 | goto out; |
1da177e4 | 4116 | |
75c096f7 | 4117 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 4118 | goto out; |
1da177e4 | 4119 | |
ca364317 | 4120 | inode = cstate->current_fh.fh_dentry->d_inode; |
1da177e4 LT |
4121 | locks_init_lock(&file_lock); |
4122 | switch (lockt->lt_type) { | |
4123 | case NFS4_READ_LT: | |
4124 | case NFS4_READW_LT: | |
4125 | file_lock.fl_type = F_RDLCK; | |
4126 | break; | |
4127 | case NFS4_WRITE_LT: | |
4128 | case NFS4_WRITEW_LT: | |
4129 | file_lock.fl_type = F_WRLCK; | |
4130 | break; | |
4131 | default: | |
2fdada03 | 4132 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
4133 | status = nfserr_inval; |
4134 | goto out; | |
4135 | } | |
4136 | ||
fe0750e5 BF |
4137 | lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner); |
4138 | if (lo) | |
4139 | file_lock.fl_owner = (fl_owner_t)lo; | |
1da177e4 LT |
4140 | file_lock.fl_pid = current->tgid; |
4141 | file_lock.fl_flags = FL_POSIX; | |
4142 | ||
4143 | file_lock.fl_start = lockt->lt_offset; | |
87df4de8 | 4144 | file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); |
1da177e4 LT |
4145 | |
4146 | nfs4_transform_lock_offset(&file_lock); | |
4147 | ||
1da177e4 | 4148 | status = nfs_ok; |
55ef1274 | 4149 | error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); |
fd85b817 ME |
4150 | if (error) { |
4151 | status = nfserrno(error); | |
4152 | goto out; | |
4153 | } | |
9d6a8c5c | 4154 | if (file_lock.fl_type != F_UNLCK) { |
1da177e4 | 4155 | status = nfserr_denied; |
9d6a8c5c | 4156 | nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); |
1da177e4 LT |
4157 | } |
4158 | out: | |
4159 | nfs4_unlock_state(); | |
4160 | return status; | |
4161 | } | |
4162 | ||
b37ad28b | 4163 | __be32 |
ca364317 | 4164 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4165 | struct nfsd4_locku *locku) |
1da177e4 LT |
4166 | { |
4167 | struct nfs4_stateid *stp; | |
4168 | struct file *filp = NULL; | |
4169 | struct file_lock file_lock; | |
b37ad28b | 4170 | __be32 status; |
b8dd7b9a | 4171 | int err; |
1da177e4 LT |
4172 | |
4173 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", | |
4174 | (long long) locku->lu_offset, | |
4175 | (long long) locku->lu_length); | |
4176 | ||
4177 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
4178 | return nfserr_inval; | |
4179 | ||
4180 | nfs4_lock_state(); | |
4181 | ||
9072d5c6 BF |
4182 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
4183 | &locku->lu_stateid, LOCK_STATE, &stp); | |
4184 | if (status) | |
1da177e4 | 4185 | goto out; |
f9d7562f BF |
4186 | filp = find_any_file(stp->st_file); |
4187 | if (!filp) { | |
4188 | status = nfserr_lock_range; | |
4189 | goto out; | |
4190 | } | |
1da177e4 LT |
4191 | BUG_ON(!filp); |
4192 | locks_init_lock(&file_lock); | |
4193 | file_lock.fl_type = F_UNLCK; | |
fe0750e5 | 4194 | file_lock.fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); |
1da177e4 LT |
4195 | file_lock.fl_pid = current->tgid; |
4196 | file_lock.fl_file = filp; | |
4197 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 4198 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
4199 | file_lock.fl_start = locku->lu_offset; |
4200 | ||
87df4de8 | 4201 | file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); |
1da177e4 LT |
4202 | nfs4_transform_lock_offset(&file_lock); |
4203 | ||
4204 | /* | |
4205 | * Try to unlock the file in the VFS. | |
4206 | */ | |
fd85b817 | 4207 | err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); |
b8dd7b9a | 4208 | if (err) { |
fd85b817 | 4209 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
4210 | goto out_nfserr; |
4211 | } | |
4212 | /* | |
4213 | * OK, unlock succeeded; the only thing left to do is update the stateid. | |
4214 | */ | |
4215 | update_stateid(&stp->st_stateid); | |
4216 | memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
4217 | ||
4218 | out: | |
1da177e4 LT |
4219 | nfs4_unlock_state(); |
4220 | return status; | |
4221 | ||
4222 | out_nfserr: | |
b8dd7b9a | 4223 | status = nfserrno(err); |
1da177e4 LT |
4224 | goto out; |
4225 | } | |
4226 | ||
4227 | /* | |
4228 | * returns | |
4229 | * 1: locks held by lockowner | |
4230 | * 0: no locks held by lockowner | |
4231 | */ | |
4232 | static int | |
fe0750e5 | 4233 | check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner) |
1da177e4 LT |
4234 | { |
4235 | struct file_lock **flpp; | |
f9d7562f | 4236 | struct inode *inode = filp->fi_inode; |
1da177e4 LT |
4237 | int status = 0; |
4238 | ||
b89f4321 | 4239 | lock_flocks(); |
1da177e4 | 4240 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
796dadfd | 4241 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
4242 | status = 1; |
4243 | goto out; | |
796dadfd | 4244 | } |
1da177e4 LT |
4245 | } |
4246 | out: | |
b89f4321 | 4247 | unlock_flocks(); |
1da177e4 LT |
4248 | return status; |
4249 | } | |
4250 | ||
b37ad28b | 4251 | __be32 |
b591480b BF |
4252 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
4253 | struct nfsd4_compound_state *cstate, | |
4254 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
4255 | { |
4256 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe | 4257 | struct nfs4_stateowner *sop; |
fe0750e5 | 4258 | struct nfs4_lockowner *lo; |
3e9e3dbe | 4259 | struct nfs4_stateid *stp; |
1da177e4 | 4260 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe N |
4261 | struct list_head matches; |
4262 | int i; | |
b37ad28b | 4263 | __be32 status; |
1da177e4 LT |
4264 | |
4265 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
4266 | clid->cl_boot, clid->cl_id); | |
4267 | ||
4268 | /* XXX check for lease expiration */ | |
4269 | ||
4270 | status = nfserr_stale_clientid; | |
849823c5 | 4271 | if (STALE_CLIENTID(clid)) |
1da177e4 | 4272 | return status; |
1da177e4 LT |
4273 | |
4274 | nfs4_lock_state(); | |
4275 | ||
3e9e3dbe N |
4276 | status = nfserr_locks_held; |
4277 | /* XXX: we're doing a linear search through all the lockowners. | |
4278 | * Yipes! For now we'll just hope clients aren't really using | |
4279 | * release_lockowner much, but eventually we have to fix these | |
4280 | * data structures. */ | |
4281 | INIT_LIST_HEAD(&matches); | |
4282 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
4283 | list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { | |
599e0a22 | 4284 | if (!same_owner_str(sop, owner, clid)) |
3e9e3dbe N |
4285 | continue; |
4286 | list_for_each_entry(stp, &sop->so_stateids, | |
4287 | st_perstateowner) { | |
fe0750e5 BF |
4288 | lo = lockowner(sop); |
4289 | if (check_for_locks(stp->st_file, lo)) | |
3e9e3dbe | 4290 | goto out; |
fe0750e5 | 4291 | list_add(&lo->lo_list, &matches); |
3e9e3dbe | 4292 | } |
1da177e4 | 4293 | } |
3e9e3dbe N |
4294 | } |
4295 | /* Clients probably won't expect us to return with some (but not all) | |
4296 | * of the lockowner state released; so don't release any until all | |
4297 | * have been checked. */ | |
4298 | status = nfs_ok; | |
0fa822e4 | 4299 | while (!list_empty(&matches)) { |
fe0750e5 BF |
4300 | lo = list_entry(matches.next, struct nfs4_lockowner, |
4301 | lo_list); | |
0fa822e4 N |
4302 | /* unhash_stateowner deletes so_perclient only |
4303 | * for openowners. */ | |
fe0750e5 BF |
4304 | list_del(&lo->lo_list); |
4305 | release_lockowner(lo); | |
1da177e4 LT |
4306 | } |
4307 | out: | |
4308 | nfs4_unlock_state(); | |
4309 | return status; | |
4310 | } | |
4311 | ||
4312 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 4313 | alloc_reclaim(void) |
1da177e4 | 4314 | { |
a55370a3 | 4315 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
4316 | } |
4317 | ||
c7b9a459 | 4318 | int |
a1bcecd2 | 4319 | nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) |
c7b9a459 N |
4320 | { |
4321 | unsigned int strhashval = clientstr_hashval(name); | |
4322 | struct nfs4_client *clp; | |
4323 | ||
e203d506 | 4324 | clp = find_confirmed_client_by_str(name, strhashval); |
c7b9a459 N |
4325 | return clp ? 1 : 0; |
4326 | } | |
4327 | ||
1da177e4 LT |
4328 | /* |
4329 | * failure => all reset bets are off, nfserr_no_grace... | |
4330 | */ | |
190e4fbf N |
4331 | int |
4332 | nfs4_client_to_reclaim(const char *name) | |
1da177e4 LT |
4333 | { |
4334 | unsigned int strhashval; | |
4335 | struct nfs4_client_reclaim *crp = NULL; | |
4336 | ||
a55370a3 N |
4337 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
4338 | crp = alloc_reclaim(); | |
1da177e4 LT |
4339 | if (!crp) |
4340 | return 0; | |
a55370a3 | 4341 | strhashval = clientstr_hashval(name); |
1da177e4 LT |
4342 | INIT_LIST_HEAD(&crp->cr_strhash); |
4343 | list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); | |
a55370a3 | 4344 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
1da177e4 LT |
4345 | reclaim_str_hashtbl_size++; |
4346 | return 1; | |
4347 | } | |
4348 | ||
4349 | static void | |
4350 | nfs4_release_reclaim(void) | |
4351 | { | |
4352 | struct nfs4_client_reclaim *crp = NULL; | |
4353 | int i; | |
4354 | ||
1da177e4 LT |
4355 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4356 | while (!list_empty(&reclaim_str_hashtbl[i])) { | |
4357 | crp = list_entry(reclaim_str_hashtbl[i].next, | |
4358 | struct nfs4_client_reclaim, cr_strhash); | |
4359 | list_del(&crp->cr_strhash); | |
1da177e4 LT |
4360 | kfree(crp); |
4361 | reclaim_str_hashtbl_size--; | |
4362 | } | |
4363 | } | |
4364 | BUG_ON(reclaim_str_hashtbl_size); | |
4365 | } | |
4366 | ||
4367 | /* | |
4368 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
fd39ca9a | 4369 | static struct nfs4_client_reclaim * |
1da177e4 LT |
4370 | nfs4_find_reclaim_client(clientid_t *clid) |
4371 | { | |
4372 | unsigned int strhashval; | |
4373 | struct nfs4_client *clp; | |
4374 | struct nfs4_client_reclaim *crp = NULL; | |
4375 | ||
4376 | ||
4377 | /* find clientid in conf_id_hashtbl */ | |
4378 | clp = find_confirmed_client(clid); | |
4379 | if (clp == NULL) | |
4380 | return NULL; | |
4381 | ||
a55370a3 N |
4382 | dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", |
4383 | clp->cl_name.len, clp->cl_name.data, | |
4384 | clp->cl_recdir); | |
1da177e4 LT |
4385 | |
4386 | /* find clp->cl_name in reclaim_str_hashtbl */ | |
a55370a3 | 4387 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 | 4388 | list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { |
a55370a3 | 4389 | if (same_name(crp->cr_recdir, clp->cl_recdir)) { |
1da177e4 LT |
4390 | return crp; |
4391 | } | |
4392 | } | |
4393 | return NULL; | |
4394 | } | |
4395 | ||
4396 | /* | |
4397 | * Called from OPEN. Look for clientid in reclaim list. | |
4398 | */ | |
b37ad28b | 4399 | __be32 |
1da177e4 LT |
4400 | nfs4_check_open_reclaim(clientid_t *clid) |
4401 | { | |
dfc83565 | 4402 | return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; |
1da177e4 LT |
4403 | } |
4404 | ||
ac4d8ff2 | 4405 | /* initialization to perform at module load time: */ |
1da177e4 | 4406 | |
e8ff2a84 | 4407 | int |
ac4d8ff2 | 4408 | nfs4_state_init(void) |
1da177e4 | 4409 | { |
e8ff2a84 | 4410 | int i, status; |
1da177e4 | 4411 | |
e8ff2a84 BF |
4412 | status = nfsd4_init_slabs(); |
4413 | if (status) | |
4414 | return status; | |
1da177e4 LT |
4415 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4416 | INIT_LIST_HEAD(&conf_id_hashtbl[i]); | |
4417 | INIT_LIST_HEAD(&conf_str_hashtbl[i]); | |
4418 | INIT_LIST_HEAD(&unconf_str_hashtbl[i]); | |
4419 | INIT_LIST_HEAD(&unconf_id_hashtbl[i]); | |
02cb2858 | 4420 | INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); |
1da177e4 | 4421 | } |
5282fd72 ME |
4422 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
4423 | INIT_LIST_HEAD(&sessionid_hashtbl[i]); | |
1da177e4 LT |
4424 | for (i = 0; i < FILE_HASH_SIZE; i++) { |
4425 | INIT_LIST_HEAD(&file_hashtbl[i]); | |
4426 | } | |
506f275f BF |
4427 | for (i = 0; i < OPEN_OWNER_HASH_SIZE; i++) { |
4428 | INIT_LIST_HEAD(&open_ownerstr_hashtbl[i]); | |
4429 | INIT_LIST_HEAD(&open_ownerid_hashtbl[i]); | |
1da177e4 | 4430 | } |
b79abadd | 4431 | for (i = 0; i < STATEID_HASH_SIZE; i++) |
1da177e4 | 4432 | INIT_LIST_HEAD(&stateid_hashtbl[i]); |
1da177e4 LT |
4433 | for (i = 0; i < LOCK_HASH_SIZE; i++) { |
4434 | INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); | |
4435 | INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); | |
4436 | } | |
1da177e4 | 4437 | memset(&onestateid, ~0, sizeof(stateid_t)); |
1da177e4 LT |
4438 | INIT_LIST_HEAD(&close_lru); |
4439 | INIT_LIST_HEAD(&client_lru); | |
4440 | INIT_LIST_HEAD(&del_recall_lru); | |
ac4d8ff2 | 4441 | reclaim_str_hashtbl_size = 0; |
e8ff2a84 | 4442 | return 0; |
ac4d8ff2 N |
4443 | } |
4444 | ||
190e4fbf N |
4445 | static void |
4446 | nfsd4_load_reboot_recovery_data(void) | |
4447 | { | |
4448 | int status; | |
4449 | ||
0964a3d3 | 4450 | nfs4_lock_state(); |
48483bf2 | 4451 | nfsd4_init_recdir(); |
190e4fbf | 4452 | status = nfsd4_recdir_load(); |
0964a3d3 | 4453 | nfs4_unlock_state(); |
190e4fbf N |
4454 | if (status) |
4455 | printk("NFSD: Failure reading reboot recovery data\n"); | |
4456 | } | |
4457 | ||
c2f1a551 MS |
4458 | /* |
4459 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
4460 | * client may quite reasonably hang on to a delegation as long as it has | |
4461 | * the inode cached. This becomes an obvious problem the first time a | |
4462 | * client's inode cache approaches the size of the server's total memory. | |
4463 | * | |
4464 | * For now we avoid this problem by imposing a hard limit on the number | |
4465 | * of delegations, which varies according to the server's memory size. | |
4466 | */ | |
4467 | static void | |
4468 | set_max_delegations(void) | |
4469 | { | |
4470 | /* | |
4471 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
4472 | * estimates suggest that in the worst case (where every delegation | |
4473 | * is for a different inode), a delegation could take about 1.5K, | |
4474 | * giving a worst case usage of about 6% of memory. | |
4475 | */ | |
4476 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
4477 | } | |
4478 | ||
ac4d8ff2 N |
4479 | /* initialization to perform when the nfsd service is started: */ |
4480 | ||
29ab23cc | 4481 | static int |
ac4d8ff2 N |
4482 | __nfs4_state_start(void) |
4483 | { | |
b5a1a81e BF |
4484 | int ret; |
4485 | ||
1da177e4 | 4486 | boot_time = get_seconds(); |
af558e33 | 4487 | locks_start_grace(&nfsd4_manager); |
9a8db97e | 4488 | printk(KERN_INFO "NFSD: starting %ld-second grace period\n", |
e46b498c | 4489 | nfsd4_grace); |
b5a1a81e BF |
4490 | ret = set_callback_cred(); |
4491 | if (ret) | |
4492 | return -ENOMEM; | |
58da282b | 4493 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
29ab23cc BF |
4494 | if (laundry_wq == NULL) |
4495 | return -ENOMEM; | |
b5a1a81e BF |
4496 | ret = nfsd4_create_callback_queue(); |
4497 | if (ret) | |
4498 | goto out_free_laundry; | |
e46b498c | 4499 | queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); |
c2f1a551 | 4500 | set_max_delegations(); |
b5a1a81e BF |
4501 | return 0; |
4502 | out_free_laundry: | |
4503 | destroy_workqueue(laundry_wq); | |
4504 | return ret; | |
1da177e4 LT |
4505 | } |
4506 | ||
29ab23cc | 4507 | int |
76a3550e | 4508 | nfs4_state_start(void) |
1da177e4 | 4509 | { |
190e4fbf | 4510 | nfsd4_load_reboot_recovery_data(); |
4ad9a344 | 4511 | return __nfs4_state_start(); |
1da177e4 LT |
4512 | } |
4513 | ||
1da177e4 LT |
4514 | static void |
4515 | __nfs4_state_shutdown(void) | |
4516 | { | |
4517 | int i; | |
4518 | struct nfs4_client *clp = NULL; | |
4519 | struct nfs4_delegation *dp = NULL; | |
1da177e4 LT |
4520 | struct list_head *pos, *next, reaplist; |
4521 | ||
1da177e4 LT |
4522 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4523 | while (!list_empty(&conf_id_hashtbl[i])) { | |
4524 | clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
4525 | expire_client(clp); | |
4526 | } | |
4527 | while (!list_empty(&unconf_str_hashtbl[i])) { | |
4528 | clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); | |
4529 | expire_client(clp); | |
4530 | } | |
4531 | } | |
4532 | INIT_LIST_HEAD(&reaplist); | |
4533 | spin_lock(&recall_lock); | |
4534 | list_for_each_safe(pos, next, &del_recall_lru) { | |
4535 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4536 | list_move(&dp->dl_recall_lru, &reaplist); | |
4537 | } | |
4538 | spin_unlock(&recall_lock); | |
4539 | list_for_each_safe(pos, next, &reaplist) { | |
4540 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4541 | list_del_init(&dp->dl_recall_lru); | |
4542 | unhash_delegation(dp); | |
4543 | } | |
4544 | ||
190e4fbf | 4545 | nfsd4_shutdown_recdir(); |
1da177e4 LT |
4546 | } |
4547 | ||
4548 | void | |
4549 | nfs4_state_shutdown(void) | |
4550 | { | |
afe2c511 | 4551 | cancel_delayed_work_sync(&laundromat_work); |
5e8d5c29 | 4552 | destroy_workqueue(laundry_wq); |
2c5e7615 | 4553 | locks_end_grace(&nfsd4_manager); |
1da177e4 LT |
4554 | nfs4_lock_state(); |
4555 | nfs4_release_reclaim(); | |
4556 | __nfs4_state_shutdown(); | |
1da177e4 | 4557 | nfs4_unlock_state(); |
c3935e30 | 4558 | nfsd4_destroy_callback_queue(); |
1da177e4 | 4559 | } |