Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/fs/nfsd/nfs4state.c | |
3 | * | |
4 | * Copyright (c) 2001 The Regents of the University of Michigan. | |
5 | * All rights reserved. | |
6 | * | |
7 | * Kendrick Smith <kmsmith@umich.edu> | |
8 | * Andy Adamson <kandros@umich.edu> | |
9 | * | |
10 | * Redistribution and use in source and binary forms, with or without | |
11 | * modification, are permitted provided that the following conditions | |
12 | * are met: | |
13 | * | |
14 | * 1. Redistributions of source code must retain the above copyright | |
15 | * notice, this list of conditions and the following disclaimer. | |
16 | * 2. Redistributions in binary form must reproduce the above copyright | |
17 | * notice, this list of conditions and the following disclaimer in the | |
18 | * documentation and/or other materials provided with the distribution. | |
19 | * 3. Neither the name of the University nor the names of its | |
20 | * contributors may be used to endorse or promote products derived | |
21 | * from this software without specific prior written permission. | |
22 | * | |
23 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
24 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
25 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
26 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
27 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
28 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
29 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
30 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
31 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
32 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
33 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
34 | * | |
35 | */ | |
36 | ||
37 | #include <linux/param.h> | |
38 | #include <linux/major.h> | |
39 | #include <linux/slab.h> | |
40 | ||
41 | #include <linux/sunrpc/svc.h> | |
42 | #include <linux/nfsd/nfsd.h> | |
43 | #include <linux/nfsd/cache.h> | |
44 | #include <linux/mount.h> | |
45 | #include <linux/workqueue.h> | |
46 | #include <linux/smp_lock.h> | |
47 | #include <linux/kthread.h> | |
48 | #include <linux/nfs4.h> | |
49 | #include <linux/nfsd/state.h> | |
50 | #include <linux/nfsd/xdr4.h> | |
0964a3d3 | 51 | #include <linux/namei.h> |
c2f1a551 | 52 | #include <linux/swap.h> |
353ab6e9 | 53 | #include <linux/mutex.h> |
fd85b817 | 54 | #include <linux/lockd/bind.h> |
9a8db97e | 55 | #include <linux/module.h> |
1da177e4 LT |
56 | |
57 | #define NFSDDBG_FACILITY NFSDDBG_PROC | |
58 | ||
59 | /* Globals */ | |
60 | static time_t lease_time = 90; /* default lease time */ | |
d99a05ad | 61 | static time_t user_lease_time = 90; |
fd39ca9a | 62 | static time_t boot_time; |
a76b4319 | 63 | static int in_grace = 1; |
1da177e4 LT |
64 | static u32 current_ownerid = 1; |
65 | static u32 current_fileid = 1; | |
66 | static u32 current_delegid = 1; | |
67 | static u32 nfs4_init; | |
fd39ca9a N |
68 | static stateid_t zerostateid; /* bits all 0 */ |
69 | static stateid_t onestateid; /* bits all 1 */ | |
70 | ||
71 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t))) | |
72 | #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t))) | |
1da177e4 | 73 | |
1da177e4 | 74 | /* forward declarations */ |
fd39ca9a | 75 | static struct nfs4_stateid * find_stateid(stateid_t *stid, int flags); |
1da177e4 LT |
76 | static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid); |
77 | static void release_stateid_lockowners(struct nfs4_stateid *open_stp); | |
0964a3d3 N |
78 | static char user_recovery_dirname[PATH_MAX] = "/var/lib/nfs/v4recovery"; |
79 | static void nfs4_set_recdir(char *recdir); | |
1da177e4 LT |
80 | |
81 | /* Locking: | |
82 | * | |
353ab6e9 | 83 | * client_mutex: |
1da177e4 LT |
84 | * protects clientid_hashtbl[], clientstr_hashtbl[], |
85 | * unconfstr_hashtbl[], uncofid_hashtbl[]. | |
86 | */ | |
353ab6e9 | 87 | static DEFINE_MUTEX(client_mutex); |
1da177e4 | 88 | |
e18b890b CL |
89 | static struct kmem_cache *stateowner_slab = NULL; |
90 | static struct kmem_cache *file_slab = NULL; | |
91 | static struct kmem_cache *stateid_slab = NULL; | |
92 | static struct kmem_cache *deleg_slab = NULL; | |
e60d4398 | 93 | |
1da177e4 LT |
94 | void |
95 | nfs4_lock_state(void) | |
96 | { | |
353ab6e9 | 97 | mutex_lock(&client_mutex); |
1da177e4 LT |
98 | } |
99 | ||
100 | void | |
101 | nfs4_unlock_state(void) | |
102 | { | |
353ab6e9 | 103 | mutex_unlock(&client_mutex); |
1da177e4 LT |
104 | } |
105 | ||
106 | static inline u32 | |
107 | opaque_hashval(const void *ptr, int nbytes) | |
108 | { | |
109 | unsigned char *cptr = (unsigned char *) ptr; | |
110 | ||
111 | u32 x = 0; | |
112 | while (nbytes--) { | |
113 | x *= 37; | |
114 | x += *cptr++; | |
115 | } | |
116 | return x; | |
117 | } | |
118 | ||
119 | /* forward declarations */ | |
120 | static void release_stateowner(struct nfs4_stateowner *sop); | |
121 | static void release_stateid(struct nfs4_stateid *stp, int flags); | |
1da177e4 LT |
122 | |
123 | /* | |
124 | * Delegation state | |
125 | */ | |
126 | ||
127 | /* recall_lock protects the del_recall_lru */ | |
34af946a | 128 | static DEFINE_SPINLOCK(recall_lock); |
1da177e4 LT |
129 | static struct list_head del_recall_lru; |
130 | ||
13cd2184 N |
131 | static void |
132 | free_nfs4_file(struct kref *kref) | |
133 | { | |
134 | struct nfs4_file *fp = container_of(kref, struct nfs4_file, fi_ref); | |
135 | list_del(&fp->fi_hash); | |
136 | iput(fp->fi_inode); | |
137 | kmem_cache_free(file_slab, fp); | |
138 | } | |
139 | ||
140 | static inline void | |
141 | put_nfs4_file(struct nfs4_file *fi) | |
142 | { | |
143 | kref_put(&fi->fi_ref, free_nfs4_file); | |
144 | } | |
145 | ||
146 | static inline void | |
147 | get_nfs4_file(struct nfs4_file *fi) | |
148 | { | |
149 | kref_get(&fi->fi_ref); | |
150 | } | |
151 | ||
ef0f3390 | 152 | static int num_delegations; |
c2f1a551 | 153 | unsigned int max_delegations; |
ef0f3390 N |
154 | |
155 | /* | |
156 | * Open owner state (share locks) | |
157 | */ | |
158 | ||
159 | /* hash tables for nfs4_stateowner */ | |
160 | #define OWNER_HASH_BITS 8 | |
161 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
162 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
163 | ||
164 | #define ownerid_hashval(id) \ | |
165 | ((id) & OWNER_HASH_MASK) | |
166 | #define ownerstr_hashval(clientid, ownername) \ | |
167 | (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK) | |
168 | ||
169 | static struct list_head ownerid_hashtbl[OWNER_HASH_SIZE]; | |
170 | static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; | |
171 | ||
172 | /* hash table for nfs4_file */ | |
173 | #define FILE_HASH_BITS 8 | |
174 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
175 | #define FILE_HASH_MASK (FILE_HASH_SIZE - 1) | |
176 | /* hash table for (open)nfs4_stateid */ | |
177 | #define STATEID_HASH_BITS 10 | |
178 | #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS) | |
179 | #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1) | |
180 | ||
181 | #define file_hashval(x) \ | |
182 | hash_ptr(x, FILE_HASH_BITS) | |
183 | #define stateid_hashval(owner_id, file_id) \ | |
184 | (((owner_id) + (file_id)) & STATEID_HASH_MASK) | |
185 | ||
186 | static struct list_head file_hashtbl[FILE_HASH_SIZE]; | |
187 | static struct list_head stateid_hashtbl[STATEID_HASH_SIZE]; | |
188 | ||
1da177e4 LT |
189 | static struct nfs4_delegation * |
190 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type) | |
191 | { | |
192 | struct nfs4_delegation *dp; | |
193 | struct nfs4_file *fp = stp->st_file; | |
194 | struct nfs4_callback *cb = &stp->st_stateowner->so_client->cl_callback; | |
195 | ||
196 | dprintk("NFSD alloc_init_deleg\n"); | |
47f9940c MS |
197 | if (fp->fi_had_conflict) |
198 | return NULL; | |
c2f1a551 | 199 | if (num_delegations > max_delegations) |
ef0f3390 | 200 | return NULL; |
5b2d21c1 N |
201 | dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); |
202 | if (dp == NULL) | |
1da177e4 | 203 | return dp; |
ef0f3390 | 204 | num_delegations++; |
ea1da636 N |
205 | INIT_LIST_HEAD(&dp->dl_perfile); |
206 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 LT |
207 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
208 | dp->dl_client = clp; | |
13cd2184 | 209 | get_nfs4_file(fp); |
1da177e4 LT |
210 | dp->dl_file = fp; |
211 | dp->dl_flock = NULL; | |
212 | get_file(stp->st_vfs_file); | |
213 | dp->dl_vfs_file = stp->st_vfs_file; | |
214 | dp->dl_type = type; | |
215 | dp->dl_recall.cbr_dp = NULL; | |
216 | dp->dl_recall.cbr_ident = cb->cb_ident; | |
217 | dp->dl_recall.cbr_trunc = 0; | |
218 | dp->dl_stateid.si_boot = boot_time; | |
219 | dp->dl_stateid.si_stateownerid = current_delegid++; | |
220 | dp->dl_stateid.si_fileid = 0; | |
221 | dp->dl_stateid.si_generation = 0; | |
222 | dp->dl_fhlen = current_fh->fh_handle.fh_size; | |
223 | memcpy(dp->dl_fhval, ¤t_fh->fh_handle.fh_base, | |
224 | current_fh->fh_handle.fh_size); | |
225 | dp->dl_time = 0; | |
226 | atomic_set(&dp->dl_count, 1); | |
ea1da636 N |
227 | list_add(&dp->dl_perfile, &fp->fi_delegations); |
228 | list_add(&dp->dl_perclnt, &clp->cl_delegations); | |
1da177e4 LT |
229 | return dp; |
230 | } | |
231 | ||
232 | void | |
233 | nfs4_put_delegation(struct nfs4_delegation *dp) | |
234 | { | |
235 | if (atomic_dec_and_test(&dp->dl_count)) { | |
236 | dprintk("NFSD: freeing dp %p\n",dp); | |
13cd2184 | 237 | put_nfs4_file(dp->dl_file); |
5b2d21c1 | 238 | kmem_cache_free(deleg_slab, dp); |
ef0f3390 | 239 | num_delegations--; |
1da177e4 LT |
240 | } |
241 | } | |
242 | ||
243 | /* Remove the associated file_lock first, then remove the delegation. | |
244 | * lease_modify() is called to remove the FS_LEASE file_lock from | |
245 | * the i_flock list, eventually calling nfsd's lock_manager | |
246 | * fl_release_callback. | |
247 | */ | |
248 | static void | |
249 | nfs4_close_delegation(struct nfs4_delegation *dp) | |
250 | { | |
251 | struct file *filp = dp->dl_vfs_file; | |
252 | ||
253 | dprintk("NFSD: close_delegation dp %p\n",dp); | |
254 | dp->dl_vfs_file = NULL; | |
255 | /* The following nfsd_close may not actually close the file, | |
256 | * but we want to remove the lease in any case. */ | |
c907132d | 257 | if (dp->dl_flock) |
a9933cea | 258 | vfs_setlease(filp, F_UNLCK, &dp->dl_flock); |
1da177e4 | 259 | nfsd_close(filp); |
1da177e4 LT |
260 | } |
261 | ||
262 | /* Called under the state lock. */ | |
263 | static void | |
264 | unhash_delegation(struct nfs4_delegation *dp) | |
265 | { | |
ea1da636 N |
266 | list_del_init(&dp->dl_perfile); |
267 | list_del_init(&dp->dl_perclnt); | |
1da177e4 LT |
268 | spin_lock(&recall_lock); |
269 | list_del_init(&dp->dl_recall_lru); | |
270 | spin_unlock(&recall_lock); | |
271 | nfs4_close_delegation(dp); | |
272 | nfs4_put_delegation(dp); | |
273 | } | |
274 | ||
275 | /* | |
276 | * SETCLIENTID state | |
277 | */ | |
278 | ||
279 | /* Hash tables for nfs4_clientid state */ | |
280 | #define CLIENT_HASH_BITS 4 | |
281 | #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) | |
282 | #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) | |
283 | ||
284 | #define clientid_hashval(id) \ | |
285 | ((id) & CLIENT_HASH_MASK) | |
a55370a3 N |
286 | #define clientstr_hashval(name) \ |
287 | (opaque_hashval((name), 8) & CLIENT_HASH_MASK) | |
1da177e4 LT |
288 | /* |
289 | * reclaim_str_hashtbl[] holds known client info from previous reset/reboot | |
290 | * used in reboot/reset lease grace period processing | |
291 | * | |
292 | * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed | |
293 | * setclientid_confirmed info. | |
294 | * | |
295 | * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed | |
296 | * setclientid info. | |
297 | * | |
298 | * client_lru holds client queue ordered by nfs4_client.cl_time | |
299 | * for lease renewal. | |
300 | * | |
301 | * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time | |
302 | * for last close replay. | |
303 | */ | |
304 | static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; | |
305 | static int reclaim_str_hashtbl_size = 0; | |
306 | static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; | |
307 | static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; | |
308 | static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; | |
309 | static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; | |
310 | static struct list_head client_lru; | |
311 | static struct list_head close_lru; | |
312 | ||
313 | static inline void | |
314 | renew_client(struct nfs4_client *clp) | |
315 | { | |
316 | /* | |
317 | * Move client to the end to the LRU list. | |
318 | */ | |
319 | dprintk("renewing client (clientid %08x/%08x)\n", | |
320 | clp->cl_clientid.cl_boot, | |
321 | clp->cl_clientid.cl_id); | |
322 | list_move_tail(&clp->cl_lru, &client_lru); | |
323 | clp->cl_time = get_seconds(); | |
324 | } | |
325 | ||
326 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ | |
327 | static int | |
328 | STALE_CLIENTID(clientid_t *clid) | |
329 | { | |
330 | if (clid->cl_boot == boot_time) | |
331 | return 0; | |
332 | dprintk("NFSD stale clientid (%08x/%08x)\n", | |
333 | clid->cl_boot, clid->cl_id); | |
334 | return 1; | |
335 | } | |
336 | ||
337 | /* | |
338 | * XXX Should we use a slab cache ? | |
339 | * This type of memory management is somewhat inefficient, but we use it | |
340 | * anyway since SETCLIENTID is not a common operation. | |
341 | */ | |
35bba9a3 | 342 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
343 | { |
344 | struct nfs4_client *clp; | |
345 | ||
35bba9a3 BF |
346 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
347 | if (clp == NULL) | |
348 | return NULL; | |
349 | clp->cl_name.data = kmalloc(name.len, GFP_KERNEL); | |
350 | if (clp->cl_name.data == NULL) { | |
351 | kfree(clp); | |
352 | return NULL; | |
1da177e4 | 353 | } |
35bba9a3 BF |
354 | memcpy(clp->cl_name.data, name.data, name.len); |
355 | clp->cl_name.len = name.len; | |
1da177e4 LT |
356 | return clp; |
357 | } | |
358 | ||
1b1a9b31 BF |
359 | static void |
360 | shutdown_callback_client(struct nfs4_client *clp) | |
361 | { | |
362 | struct rpc_clnt *clnt = clp->cl_callback.cb_client; | |
363 | ||
364 | /* shutdown rpc client, ending any outstanding recall rpcs */ | |
365 | if (clnt) { | |
366 | clp->cl_callback.cb_client = NULL; | |
367 | rpc_shutdown_client(clnt); | |
368 | } | |
369 | } | |
370 | ||
1da177e4 LT |
371 | static inline void |
372 | free_client(struct nfs4_client *clp) | |
373 | { | |
1b1a9b31 | 374 | shutdown_callback_client(clp); |
1da177e4 LT |
375 | if (clp->cl_cred.cr_group_info) |
376 | put_group_info(clp->cl_cred.cr_group_info); | |
377 | kfree(clp->cl_name.data); | |
378 | kfree(clp); | |
379 | } | |
380 | ||
381 | void | |
382 | put_nfs4_client(struct nfs4_client *clp) | |
383 | { | |
384 | if (atomic_dec_and_test(&clp->cl_count)) | |
385 | free_client(clp); | |
386 | } | |
387 | ||
388 | static void | |
389 | expire_client(struct nfs4_client *clp) | |
390 | { | |
391 | struct nfs4_stateowner *sop; | |
392 | struct nfs4_delegation *dp; | |
1da177e4 LT |
393 | struct list_head reaplist; |
394 | ||
395 | dprintk("NFSD: expire_client cl_count %d\n", | |
396 | atomic_read(&clp->cl_count)); | |
397 | ||
1da177e4 LT |
398 | INIT_LIST_HEAD(&reaplist); |
399 | spin_lock(&recall_lock); | |
ea1da636 N |
400 | while (!list_empty(&clp->cl_delegations)) { |
401 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
1da177e4 LT |
402 | dprintk("NFSD: expire client. dp %p, fp %p\n", dp, |
403 | dp->dl_flock); | |
ea1da636 | 404 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
405 | list_move(&dp->dl_recall_lru, &reaplist); |
406 | } | |
407 | spin_unlock(&recall_lock); | |
408 | while (!list_empty(&reaplist)) { | |
409 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
410 | list_del_init(&dp->dl_recall_lru); | |
411 | unhash_delegation(dp); | |
412 | } | |
413 | list_del(&clp->cl_idhash); | |
414 | list_del(&clp->cl_strhash); | |
415 | list_del(&clp->cl_lru); | |
ea1da636 N |
416 | while (!list_empty(&clp->cl_openowners)) { |
417 | sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient); | |
1da177e4 LT |
418 | release_stateowner(sop); |
419 | } | |
420 | put_nfs4_client(clp); | |
421 | } | |
422 | ||
35bba9a3 BF |
423 | static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir) |
424 | { | |
1da177e4 LT |
425 | struct nfs4_client *clp; |
426 | ||
35bba9a3 BF |
427 | clp = alloc_client(name); |
428 | if (clp == NULL) | |
429 | return NULL; | |
a55370a3 | 430 | memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); |
1da177e4 LT |
431 | atomic_set(&clp->cl_count, 1); |
432 | atomic_set(&clp->cl_callback.cb_set, 0); | |
1da177e4 LT |
433 | INIT_LIST_HEAD(&clp->cl_idhash); |
434 | INIT_LIST_HEAD(&clp->cl_strhash); | |
ea1da636 N |
435 | INIT_LIST_HEAD(&clp->cl_openowners); |
436 | INIT_LIST_HEAD(&clp->cl_delegations); | |
1da177e4 | 437 | INIT_LIST_HEAD(&clp->cl_lru); |
1da177e4 LT |
438 | return clp; |
439 | } | |
440 | ||
35bba9a3 BF |
441 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
442 | { | |
443 | memcpy(target->cl_verifier.data, source->data, | |
444 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
445 | } |
446 | ||
35bba9a3 BF |
447 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
448 | { | |
1da177e4 LT |
449 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
450 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
451 | } | |
452 | ||
35bba9a3 BF |
453 | static void copy_cred(struct svc_cred *target, struct svc_cred *source) |
454 | { | |
1da177e4 LT |
455 | target->cr_uid = source->cr_uid; |
456 | target->cr_gid = source->cr_gid; | |
457 | target->cr_group_info = source->cr_group_info; | |
458 | get_group_info(target->cr_group_info); | |
459 | } | |
460 | ||
35bba9a3 | 461 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 462 | { |
a55370a3 | 463 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
464 | } |
465 | ||
466 | static int | |
599e0a22 BF |
467 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
468 | { | |
469 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
470 | } |
471 | ||
472 | static int | |
599e0a22 BF |
473 | same_clid(clientid_t *cl1, clientid_t *cl2) |
474 | { | |
475 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
476 | } |
477 | ||
478 | /* XXX what about NGROUP */ | |
479 | static int | |
599e0a22 BF |
480 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
481 | { | |
482 | return cr1->cr_uid == cr2->cr_uid; | |
1da177e4 LT |
483 | } |
484 | ||
5ec7b46c BF |
485 | static void gen_clid(struct nfs4_client *clp) |
486 | { | |
487 | static u32 current_clientid = 1; | |
488 | ||
1da177e4 LT |
489 | clp->cl_clientid.cl_boot = boot_time; |
490 | clp->cl_clientid.cl_id = current_clientid++; | |
491 | } | |
492 | ||
deda2faa BF |
493 | static void gen_confirm(struct nfs4_client *clp) |
494 | { | |
495 | static u32 i; | |
496 | u32 *p; | |
1da177e4 | 497 | |
1da177e4 | 498 | p = (u32 *)clp->cl_confirm.data; |
deda2faa BF |
499 | *p++ = get_seconds(); |
500 | *p++ = i++; | |
1da177e4 LT |
501 | } |
502 | ||
35bba9a3 BF |
503 | static int check_name(struct xdr_netobj name) |
504 | { | |
1da177e4 LT |
505 | if (name.len == 0) |
506 | return 0; | |
507 | if (name.len > NFS4_OPAQUE_LIMIT) { | |
2fdada03 | 508 | dprintk("NFSD: check_name: name too long(%d)!\n", name.len); |
1da177e4 LT |
509 | return 0; |
510 | } | |
511 | return 1; | |
512 | } | |
513 | ||
fd39ca9a | 514 | static void |
1da177e4 LT |
515 | add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) |
516 | { | |
517 | unsigned int idhashval; | |
518 | ||
519 | list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); | |
520 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
521 | list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); | |
522 | list_add_tail(&clp->cl_lru, &client_lru); | |
523 | clp->cl_time = get_seconds(); | |
524 | } | |
525 | ||
fd39ca9a | 526 | static void |
1da177e4 LT |
527 | move_to_confirmed(struct nfs4_client *clp) |
528 | { | |
529 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
530 | unsigned int strhashval; | |
531 | ||
532 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
533 | list_del_init(&clp->cl_strhash); | |
f116629d | 534 | list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); |
a55370a3 | 535 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 LT |
536 | list_add(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); |
537 | renew_client(clp); | |
538 | } | |
539 | ||
540 | static struct nfs4_client * | |
541 | find_confirmed_client(clientid_t *clid) | |
542 | { | |
543 | struct nfs4_client *clp; | |
544 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
545 | ||
546 | list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 547 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
548 | return clp; |
549 | } | |
550 | return NULL; | |
551 | } | |
552 | ||
553 | static struct nfs4_client * | |
554 | find_unconfirmed_client(clientid_t *clid) | |
555 | { | |
556 | struct nfs4_client *clp; | |
557 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
558 | ||
559 | list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 560 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
561 | return clp; |
562 | } | |
563 | return NULL; | |
564 | } | |
565 | ||
28ce6054 N |
566 | static struct nfs4_client * |
567 | find_confirmed_client_by_str(const char *dname, unsigned int hashval) | |
568 | { | |
569 | struct nfs4_client *clp; | |
570 | ||
571 | list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { | |
572 | if (same_name(clp->cl_recdir, dname)) | |
573 | return clp; | |
574 | } | |
575 | return NULL; | |
576 | } | |
577 | ||
578 | static struct nfs4_client * | |
579 | find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) | |
580 | { | |
581 | struct nfs4_client *clp; | |
582 | ||
583 | list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { | |
584 | if (same_name(clp->cl_recdir, dname)) | |
585 | return clp; | |
586 | } | |
587 | return NULL; | |
588 | } | |
589 | ||
1da177e4 LT |
590 | /* a helper function for parse_callback */ |
591 | static int | |
592 | parse_octet(unsigned int *lenp, char **addrp) | |
593 | { | |
594 | unsigned int len = *lenp; | |
595 | char *p = *addrp; | |
596 | int n = -1; | |
597 | char c; | |
598 | ||
599 | for (;;) { | |
600 | if (!len) | |
601 | break; | |
602 | len--; | |
603 | c = *p++; | |
604 | if (c == '.') | |
605 | break; | |
606 | if ((c < '0') || (c > '9')) { | |
607 | n = -1; | |
608 | break; | |
609 | } | |
610 | if (n < 0) | |
611 | n = 0; | |
612 | n = (n * 10) + (c - '0'); | |
613 | if (n > 255) { | |
614 | n = -1; | |
615 | break; | |
616 | } | |
617 | } | |
618 | *lenp = len; | |
619 | *addrp = p; | |
620 | return n; | |
621 | } | |
622 | ||
623 | /* parse and set the setclientid ipv4 callback address */ | |
fd39ca9a | 624 | static int |
1da177e4 LT |
625 | parse_ipv4(unsigned int addr_len, char *addr_val, unsigned int *cbaddrp, unsigned short *cbportp) |
626 | { | |
627 | int temp = 0; | |
628 | u32 cbaddr = 0; | |
629 | u16 cbport = 0; | |
630 | u32 addrlen = addr_len; | |
631 | char *addr = addr_val; | |
632 | int i, shift; | |
633 | ||
634 | /* ipaddress */ | |
635 | shift = 24; | |
636 | for(i = 4; i > 0 ; i--) { | |
637 | if ((temp = parse_octet(&addrlen, &addr)) < 0) { | |
638 | return 0; | |
639 | } | |
640 | cbaddr |= (temp << shift); | |
641 | if (shift > 0) | |
642 | shift -= 8; | |
643 | } | |
644 | *cbaddrp = cbaddr; | |
645 | ||
646 | /* port */ | |
647 | shift = 8; | |
648 | for(i = 2; i > 0 ; i--) { | |
649 | if ((temp = parse_octet(&addrlen, &addr)) < 0) { | |
650 | return 0; | |
651 | } | |
652 | cbport |= (temp << shift); | |
653 | if (shift > 0) | |
654 | shift -= 8; | |
655 | } | |
656 | *cbportp = cbport; | |
657 | return 1; | |
658 | } | |
659 | ||
fd39ca9a | 660 | static void |
1da177e4 LT |
661 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se) |
662 | { | |
663 | struct nfs4_callback *cb = &clp->cl_callback; | |
664 | ||
665 | /* Currently, we only support tcp for the callback channel */ | |
666 | if ((se->se_callback_netid_len != 3) || memcmp((char *)se->se_callback_netid_val, "tcp", 3)) | |
667 | goto out_err; | |
668 | ||
669 | if ( !(parse_ipv4(se->se_callback_addr_len, se->se_callback_addr_val, | |
670 | &cb->cb_addr, &cb->cb_port))) | |
671 | goto out_err; | |
672 | cb->cb_prog = se->se_callback_prog; | |
673 | cb->cb_ident = se->se_callback_ident; | |
1da177e4 LT |
674 | return; |
675 | out_err: | |
849823c5 | 676 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
677 | "will not receive delegations\n", |
678 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
679 | ||
1da177e4 LT |
680 | return; |
681 | } | |
682 | ||
b37ad28b | 683 | __be32 |
b591480b BF |
684 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
685 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 686 | { |
27459f09 | 687 | struct sockaddr_in *sin = svc_addr_in(rqstp); |
1da177e4 LT |
688 | struct xdr_netobj clname = { |
689 | .len = setclid->se_namelen, | |
690 | .data = setclid->se_name, | |
691 | }; | |
692 | nfs4_verifier clverifier = setclid->se_verf; | |
693 | unsigned int strhashval; | |
28ce6054 | 694 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 695 | __be32 status; |
a55370a3 | 696 | char dname[HEXDIR_LEN]; |
1da177e4 | 697 | |
1da177e4 | 698 | if (!check_name(clname)) |
73aea4ec | 699 | return nfserr_inval; |
1da177e4 | 700 | |
a55370a3 N |
701 | status = nfs4_make_rec_clidname(dname, &clname); |
702 | if (status) | |
73aea4ec | 703 | return status; |
a55370a3 | 704 | |
1da177e4 LT |
705 | /* |
706 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
707 | * We get here on a DRC miss. | |
708 | */ | |
709 | ||
a55370a3 | 710 | strhashval = clientstr_hashval(dname); |
1da177e4 | 711 | |
1da177e4 | 712 | nfs4_lock_state(); |
28ce6054 N |
713 | conf = find_confirmed_client_by_str(dname, strhashval); |
714 | if (conf) { | |
a186e767 | 715 | /* RFC 3530 14.2.33 CASE 0: */ |
1da177e4 | 716 | status = nfserr_clid_inuse; |
599e0a22 | 717 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred) |
27459f09 | 718 | || conf->cl_addr != sin->sin_addr.s_addr) { |
21315edd BF |
719 | dprintk("NFSD: setclientid: string in use by client" |
720 | "at %u.%u.%u.%u\n", NIPQUAD(conf->cl_addr)); | |
1da177e4 LT |
721 | goto out; |
722 | } | |
1da177e4 | 723 | } |
a186e767 BF |
724 | /* |
725 | * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") | |
726 | * has a description of SETCLIENTID request processing consisting | |
727 | * of 5 bullet points, labeled as CASE0 - CASE4 below. | |
728 | */ | |
28ce6054 | 729 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
1da177e4 LT |
730 | status = nfserr_resource; |
731 | if (!conf) { | |
a186e767 BF |
732 | /* |
733 | * RFC 3530 14.2.33 CASE 4: | |
734 | * placed first, because it is the normal case | |
1da177e4 LT |
735 | */ |
736 | if (unconf) | |
737 | expire_client(unconf); | |
a55370a3 N |
738 | new = create_client(clname, dname); |
739 | if (new == NULL) | |
1da177e4 | 740 | goto out; |
1da177e4 | 741 | gen_clid(new); |
599e0a22 | 742 | } else if (same_verf(&conf->cl_verifier, &clverifier)) { |
1da177e4 | 743 | /* |
a186e767 BF |
744 | * RFC 3530 14.2.33 CASE 1: |
745 | * probable callback update | |
1da177e4 | 746 | */ |
31f4a6c1 N |
747 | if (unconf) { |
748 | /* Note this is removing unconfirmed {*x***}, | |
749 | * which is stronger than RFC recommended {vxc**}. | |
750 | * This has the advantage that there is at most | |
751 | * one {*x***} in either list at any time. | |
752 | */ | |
753 | expire_client(unconf); | |
1da177e4 | 754 | } |
a55370a3 N |
755 | new = create_client(clname, dname); |
756 | if (new == NULL) | |
1da177e4 | 757 | goto out; |
1da177e4 | 758 | copy_clid(new, conf); |
1da177e4 LT |
759 | } else if (!unconf) { |
760 | /* | |
a186e767 BF |
761 | * RFC 3530 14.2.33 CASE 2: |
762 | * probable client reboot; state will be removed if | |
763 | * confirmed. | |
1da177e4 | 764 | */ |
a55370a3 N |
765 | new = create_client(clname, dname); |
766 | if (new == NULL) | |
1da177e4 | 767 | goto out; |
1da177e4 | 768 | gen_clid(new); |
49ba8781 | 769 | } else { |
a186e767 BF |
770 | /* |
771 | * RFC 3530 14.2.33 CASE 3: | |
772 | * probable client reboot; state will be removed if | |
773 | * confirmed. | |
1da177e4 LT |
774 | */ |
775 | expire_client(unconf); | |
a55370a3 N |
776 | new = create_client(clname, dname); |
777 | if (new == NULL) | |
1da177e4 | 778 | goto out; |
1da177e4 | 779 | gen_clid(new); |
1da177e4 | 780 | } |
c175b83c BF |
781 | copy_verf(new, &clverifier); |
782 | new->cl_addr = sin->sin_addr.s_addr; | |
783 | copy_cred(&new->cl_cred, &rqstp->rq_cred); | |
784 | gen_confirm(new); | |
785 | gen_callback(new, setclid); | |
786 | add_to_unconfirmed(new, strhashval); | |
1da177e4 LT |
787 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
788 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
789 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
790 | status = nfs_ok; | |
791 | out: | |
792 | nfs4_unlock_state(); | |
793 | return status; | |
794 | } | |
795 | ||
796 | ||
797 | /* | |
a186e767 BF |
798 | * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has |
799 | * a description of SETCLIENTID_CONFIRM request processing consisting of 4 | |
800 | * bullets, labeled as CASE1 - CASE4 below. | |
1da177e4 | 801 | */ |
b37ad28b | 802 | __be32 |
b591480b BF |
803 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
804 | struct nfsd4_compound_state *cstate, | |
805 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 806 | { |
27459f09 | 807 | struct sockaddr_in *sin = svc_addr_in(rqstp); |
21ab45a4 | 808 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
809 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
810 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 811 | __be32 status; |
1da177e4 LT |
812 | |
813 | if (STALE_CLIENTID(clid)) | |
814 | return nfserr_stale_clientid; | |
815 | /* | |
816 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
817 | * We get here on a DRC miss. | |
818 | */ | |
819 | ||
820 | nfs4_lock_state(); | |
21ab45a4 N |
821 | |
822 | conf = find_confirmed_client(clid); | |
823 | unconf = find_unconfirmed_client(clid); | |
824 | ||
825 | status = nfserr_clid_inuse; | |
27459f09 | 826 | if (conf && conf->cl_addr != sin->sin_addr.s_addr) |
21ab45a4 | 827 | goto out; |
27459f09 | 828 | if (unconf && unconf->cl_addr != sin->sin_addr.s_addr) |
21ab45a4 N |
829 | goto out; |
830 | ||
a186e767 BF |
831 | /* |
832 | * section 14.2.34 of RFC 3530 has a description of | |
833 | * SETCLIENTID_CONFIRM request processing consisting | |
834 | * of 4 bullet points, labeled as CASE1 - CASE4 below. | |
835 | */ | |
366e0c1d | 836 | if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { |
a186e767 BF |
837 | /* |
838 | * RFC 3530 14.2.34 CASE 1: | |
839 | * callback update | |
840 | */ | |
599e0a22 | 841 | if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) |
1da177e4 LT |
842 | status = nfserr_clid_inuse; |
843 | else { | |
1a69c179 N |
844 | /* XXX: We just turn off callbacks until we can handle |
845 | * change request correctly. */ | |
cb36d634 | 846 | atomic_set(&conf->cl_callback.cb_set, 0); |
21ab45a4 | 847 | gen_confirm(conf); |
46309029 | 848 | nfsd4_remove_clid_dir(unconf); |
1a69c179 | 849 | expire_client(unconf); |
1da177e4 | 850 | status = nfs_ok; |
1a69c179 | 851 | |
1da177e4 | 852 | } |
f3aba4e5 | 853 | } else if (conf && !unconf) { |
a186e767 BF |
854 | /* |
855 | * RFC 3530 14.2.34 CASE 2: | |
856 | * probable retransmitted request; play it safe and | |
857 | * do nothing. | |
7c79f737 | 858 | */ |
599e0a22 | 859 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) |
1da177e4 | 860 | status = nfserr_clid_inuse; |
21ab45a4 | 861 | else |
1da177e4 | 862 | status = nfs_ok; |
7c79f737 | 863 | } else if (!conf && unconf |
599e0a22 | 864 | && same_verf(&unconf->cl_confirm, &confirm)) { |
a186e767 BF |
865 | /* |
866 | * RFC 3530 14.2.34 CASE 3: | |
867 | * Normal case; new or rebooted client: | |
7c79f737 | 868 | */ |
599e0a22 | 869 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { |
1da177e4 LT |
870 | status = nfserr_clid_inuse; |
871 | } else { | |
1a69c179 N |
872 | unsigned int hash = |
873 | clientstr_hashval(unconf->cl_recdir); | |
874 | conf = find_confirmed_client_by_str(unconf->cl_recdir, | |
875 | hash); | |
876 | if (conf) { | |
c7b9a459 | 877 | nfsd4_remove_clid_dir(conf); |
1a69c179 N |
878 | expire_client(conf); |
879 | } | |
1da177e4 | 880 | move_to_confirmed(unconf); |
21ab45a4 | 881 | conf = unconf; |
46f8a64b | 882 | nfsd4_probe_callback(conf); |
1a69c179 | 883 | status = nfs_ok; |
1da177e4 | 884 | } |
599e0a22 BF |
885 | } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) |
886 | && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, | |
7c79f737 | 887 | &confirm)))) { |
a186e767 BF |
888 | /* |
889 | * RFC 3530 14.2.34 CASE 4: | |
890 | * Client probably hasn't noticed that we rebooted yet. | |
7c79f737 | 891 | */ |
1da177e4 | 892 | status = nfserr_stale_clientid; |
7c79f737 | 893 | } else { |
08e8987c N |
894 | /* check that we have hit one of the cases...*/ |
895 | status = nfserr_clid_inuse; | |
896 | } | |
1da177e4 | 897 | out: |
1da177e4 LT |
898 | nfs4_unlock_state(); |
899 | return status; | |
900 | } | |
901 | ||
1da177e4 LT |
902 | /* OPEN Share state helper functions */ |
903 | static inline struct nfs4_file * | |
904 | alloc_init_file(struct inode *ino) | |
905 | { | |
906 | struct nfs4_file *fp; | |
907 | unsigned int hashval = file_hashval(ino); | |
908 | ||
e60d4398 N |
909 | fp = kmem_cache_alloc(file_slab, GFP_KERNEL); |
910 | if (fp) { | |
13cd2184 | 911 | kref_init(&fp->fi_ref); |
1da177e4 | 912 | INIT_LIST_HEAD(&fp->fi_hash); |
8beefa24 N |
913 | INIT_LIST_HEAD(&fp->fi_stateids); |
914 | INIT_LIST_HEAD(&fp->fi_delegations); | |
1da177e4 LT |
915 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); |
916 | fp->fi_inode = igrab(ino); | |
917 | fp->fi_id = current_fileid++; | |
47f9940c | 918 | fp->fi_had_conflict = false; |
1da177e4 LT |
919 | return fp; |
920 | } | |
921 | return NULL; | |
922 | } | |
923 | ||
e60d4398 | 924 | static void |
e18b890b | 925 | nfsd4_free_slab(struct kmem_cache **slab) |
1da177e4 | 926 | { |
e60d4398 N |
927 | if (*slab == NULL) |
928 | return; | |
1a1d92c1 | 929 | kmem_cache_destroy(*slab); |
e60d4398 | 930 | *slab = NULL; |
1da177e4 LT |
931 | } |
932 | ||
e8ff2a84 | 933 | void |
1da177e4 LT |
934 | nfsd4_free_slabs(void) |
935 | { | |
e60d4398 N |
936 | nfsd4_free_slab(&stateowner_slab); |
937 | nfsd4_free_slab(&file_slab); | |
5ac049ac | 938 | nfsd4_free_slab(&stateid_slab); |
5b2d21c1 | 939 | nfsd4_free_slab(&deleg_slab); |
e60d4398 | 940 | } |
1da177e4 | 941 | |
e60d4398 N |
942 | static int |
943 | nfsd4_init_slabs(void) | |
944 | { | |
945 | stateowner_slab = kmem_cache_create("nfsd4_stateowners", | |
20c2df83 | 946 | sizeof(struct nfs4_stateowner), 0, 0, NULL); |
e60d4398 N |
947 | if (stateowner_slab == NULL) |
948 | goto out_nomem; | |
949 | file_slab = kmem_cache_create("nfsd4_files", | |
20c2df83 | 950 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 N |
951 | if (file_slab == NULL) |
952 | goto out_nomem; | |
5ac049ac | 953 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
20c2df83 | 954 | sizeof(struct nfs4_stateid), 0, 0, NULL); |
5ac049ac N |
955 | if (stateid_slab == NULL) |
956 | goto out_nomem; | |
5b2d21c1 | 957 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 958 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 N |
959 | if (deleg_slab == NULL) |
960 | goto out_nomem; | |
e60d4398 N |
961 | return 0; |
962 | out_nomem: | |
963 | nfsd4_free_slabs(); | |
964 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | |
965 | return -ENOMEM; | |
1da177e4 LT |
966 | } |
967 | ||
968 | void | |
969 | nfs4_free_stateowner(struct kref *kref) | |
970 | { | |
971 | struct nfs4_stateowner *sop = | |
972 | container_of(kref, struct nfs4_stateowner, so_ref); | |
973 | kfree(sop->so_owner.data); | |
974 | kmem_cache_free(stateowner_slab, sop); | |
975 | } | |
976 | ||
977 | static inline struct nfs4_stateowner * | |
978 | alloc_stateowner(struct xdr_netobj *owner) | |
979 | { | |
980 | struct nfs4_stateowner *sop; | |
981 | ||
982 | if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) { | |
983 | if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) { | |
984 | memcpy(sop->so_owner.data, owner->data, owner->len); | |
985 | sop->so_owner.len = owner->len; | |
986 | kref_init(&sop->so_ref); | |
987 | return sop; | |
988 | } | |
989 | kmem_cache_free(stateowner_slab, sop); | |
990 | } | |
991 | return NULL; | |
992 | } | |
993 | ||
994 | static struct nfs4_stateowner * | |
995 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { | |
996 | struct nfs4_stateowner *sop; | |
997 | struct nfs4_replay *rp; | |
998 | unsigned int idhashval; | |
999 | ||
1000 | if (!(sop = alloc_stateowner(&open->op_owner))) | |
1001 | return NULL; | |
1002 | idhashval = ownerid_hashval(current_ownerid); | |
1003 | INIT_LIST_HEAD(&sop->so_idhash); | |
1004 | INIT_LIST_HEAD(&sop->so_strhash); | |
1005 | INIT_LIST_HEAD(&sop->so_perclient); | |
ea1da636 N |
1006 | INIT_LIST_HEAD(&sop->so_stateids); |
1007 | INIT_LIST_HEAD(&sop->so_perstateid); /* not used */ | |
1da177e4 LT |
1008 | INIT_LIST_HEAD(&sop->so_close_lru); |
1009 | sop->so_time = 0; | |
1010 | list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]); | |
1011 | list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]); | |
ea1da636 | 1012 | list_add(&sop->so_perclient, &clp->cl_openowners); |
1da177e4 LT |
1013 | sop->so_is_open_owner = 1; |
1014 | sop->so_id = current_ownerid++; | |
1015 | sop->so_client = clp; | |
1016 | sop->so_seqid = open->op_seqid; | |
1017 | sop->so_confirmed = 0; | |
1018 | rp = &sop->so_replay; | |
de1ae286 | 1019 | rp->rp_status = nfserr_serverfault; |
1da177e4 LT |
1020 | rp->rp_buflen = 0; |
1021 | rp->rp_buf = rp->rp_ibuf; | |
1022 | return sop; | |
1023 | } | |
1024 | ||
1025 | static void | |
1026 | release_stateid_lockowners(struct nfs4_stateid *open_stp) | |
1027 | { | |
1028 | struct nfs4_stateowner *lock_sop; | |
1029 | ||
ea1da636 N |
1030 | while (!list_empty(&open_stp->st_lockowners)) { |
1031 | lock_sop = list_entry(open_stp->st_lockowners.next, | |
1032 | struct nfs4_stateowner, so_perstateid); | |
1033 | /* list_del(&open_stp->st_lockowners); */ | |
1da177e4 LT |
1034 | BUG_ON(lock_sop->so_is_open_owner); |
1035 | release_stateowner(lock_sop); | |
1036 | } | |
1037 | } | |
1038 | ||
1039 | static void | |
1040 | unhash_stateowner(struct nfs4_stateowner *sop) | |
1041 | { | |
1042 | struct nfs4_stateid *stp; | |
1043 | ||
1044 | list_del(&sop->so_idhash); | |
1045 | list_del(&sop->so_strhash); | |
6fa305de | 1046 | if (sop->so_is_open_owner) |
1da177e4 | 1047 | list_del(&sop->so_perclient); |
ea1da636 N |
1048 | list_del(&sop->so_perstateid); |
1049 | while (!list_empty(&sop->so_stateids)) { | |
1050 | stp = list_entry(sop->so_stateids.next, | |
1051 | struct nfs4_stateid, st_perstateowner); | |
1da177e4 LT |
1052 | if (sop->so_is_open_owner) |
1053 | release_stateid(stp, OPEN_STATE); | |
1054 | else | |
1055 | release_stateid(stp, LOCK_STATE); | |
1056 | } | |
1057 | } | |
1058 | ||
1059 | static void | |
1060 | release_stateowner(struct nfs4_stateowner *sop) | |
1061 | { | |
1062 | unhash_stateowner(sop); | |
1063 | list_del(&sop->so_close_lru); | |
1064 | nfs4_put_stateowner(sop); | |
1065 | } | |
1066 | ||
1067 | static inline void | |
1068 | init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { | |
1069 | struct nfs4_stateowner *sop = open->op_stateowner; | |
1070 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); | |
1071 | ||
1072 | INIT_LIST_HEAD(&stp->st_hash); | |
ea1da636 N |
1073 | INIT_LIST_HEAD(&stp->st_perstateowner); |
1074 | INIT_LIST_HEAD(&stp->st_lockowners); | |
1da177e4 LT |
1075 | INIT_LIST_HEAD(&stp->st_perfile); |
1076 | list_add(&stp->st_hash, &stateid_hashtbl[hashval]); | |
ea1da636 | 1077 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
8beefa24 | 1078 | list_add(&stp->st_perfile, &fp->fi_stateids); |
1da177e4 | 1079 | stp->st_stateowner = sop; |
13cd2184 | 1080 | get_nfs4_file(fp); |
1da177e4 LT |
1081 | stp->st_file = fp; |
1082 | stp->st_stateid.si_boot = boot_time; | |
1083 | stp->st_stateid.si_stateownerid = sop->so_id; | |
1084 | stp->st_stateid.si_fileid = fp->fi_id; | |
1085 | stp->st_stateid.si_generation = 0; | |
1086 | stp->st_access_bmap = 0; | |
1087 | stp->st_deny_bmap = 0; | |
1088 | __set_bit(open->op_share_access, &stp->st_access_bmap); | |
1089 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); | |
4c4cd222 | 1090 | stp->st_openstp = NULL; |
1da177e4 LT |
1091 | } |
1092 | ||
1093 | static void | |
1094 | release_stateid(struct nfs4_stateid *stp, int flags) | |
1095 | { | |
1096 | struct file *filp = stp->st_vfs_file; | |
1097 | ||
1098 | list_del(&stp->st_hash); | |
1da177e4 | 1099 | list_del(&stp->st_perfile); |
ea1da636 | 1100 | list_del(&stp->st_perstateowner); |
1da177e4 LT |
1101 | if (flags & OPEN_STATE) { |
1102 | release_stateid_lockowners(stp); | |
1103 | stp->st_vfs_file = NULL; | |
1104 | nfsd_close(filp); | |
1da177e4 LT |
1105 | } else if (flags & LOCK_STATE) |
1106 | locks_remove_posix(filp, (fl_owner_t) stp->st_stateowner); | |
13cd2184 | 1107 | put_nfs4_file(stp->st_file); |
5ac049ac | 1108 | kmem_cache_free(stateid_slab, stp); |
1da177e4 LT |
1109 | } |
1110 | ||
fd39ca9a | 1111 | static void |
1da177e4 LT |
1112 | move_to_close_lru(struct nfs4_stateowner *sop) |
1113 | { | |
1114 | dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); | |
1115 | ||
358dd55a | 1116 | list_move_tail(&sop->so_close_lru, &close_lru); |
1da177e4 LT |
1117 | sop->so_time = get_seconds(); |
1118 | } | |
1119 | ||
1da177e4 | 1120 | static int |
599e0a22 BF |
1121 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
1122 | clientid_t *clid) | |
1123 | { | |
1124 | return (sop->so_owner.len == owner->len) && | |
1125 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
1126 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
1127 | } |
1128 | ||
1129 | static struct nfs4_stateowner * | |
1130 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) | |
1131 | { | |
1132 | struct nfs4_stateowner *so = NULL; | |
1133 | ||
1134 | list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { | |
599e0a22 | 1135 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) |
1da177e4 LT |
1136 | return so; |
1137 | } | |
1138 | return NULL; | |
1139 | } | |
1140 | ||
1141 | /* search file_hashtbl[] for file */ | |
1142 | static struct nfs4_file * | |
1143 | find_file(struct inode *ino) | |
1144 | { | |
1145 | unsigned int hashval = file_hashval(ino); | |
1146 | struct nfs4_file *fp; | |
1147 | ||
1148 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { | |
13cd2184 N |
1149 | if (fp->fi_inode == ino) { |
1150 | get_nfs4_file(fp); | |
1da177e4 | 1151 | return fp; |
13cd2184 | 1152 | } |
1da177e4 LT |
1153 | } |
1154 | return NULL; | |
1155 | } | |
1156 | ||
ba5a6a19 BF |
1157 | static int access_valid(u32 x) |
1158 | { | |
1159 | return (x > 0 && x < 4); | |
1160 | } | |
1161 | ||
1162 | static int deny_valid(u32 x) | |
1163 | { | |
1164 | return (x >= 0 && x < 5); | |
1165 | } | |
1da177e4 | 1166 | |
fd39ca9a | 1167 | static void |
1da177e4 LT |
1168 | set_access(unsigned int *access, unsigned long bmap) { |
1169 | int i; | |
1170 | ||
1171 | *access = 0; | |
1172 | for (i = 1; i < 4; i++) { | |
1173 | if (test_bit(i, &bmap)) | |
1174 | *access |= i; | |
1175 | } | |
1176 | } | |
1177 | ||
fd39ca9a | 1178 | static void |
1da177e4 LT |
1179 | set_deny(unsigned int *deny, unsigned long bmap) { |
1180 | int i; | |
1181 | ||
1182 | *deny = 0; | |
1183 | for (i = 0; i < 4; i++) { | |
1184 | if (test_bit(i, &bmap)) | |
1185 | *deny |= i ; | |
1186 | } | |
1187 | } | |
1188 | ||
1189 | static int | |
1190 | test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { | |
1191 | unsigned int access, deny; | |
1192 | ||
1193 | set_access(&access, stp->st_access_bmap); | |
1194 | set_deny(&deny, stp->st_deny_bmap); | |
1195 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) | |
1196 | return 0; | |
1197 | return 1; | |
1198 | } | |
1199 | ||
1200 | /* | |
1201 | * Called to check deny when READ with all zero stateid or | |
1202 | * WRITE with all zero or all one stateid | |
1203 | */ | |
b37ad28b | 1204 | static __be32 |
1da177e4 LT |
1205 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
1206 | { | |
1207 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
1208 | struct nfs4_file *fp; | |
1209 | struct nfs4_stateid *stp; | |
b37ad28b | 1210 | __be32 ret; |
1da177e4 LT |
1211 | |
1212 | dprintk("NFSD: nfs4_share_conflict\n"); | |
1213 | ||
1214 | fp = find_file(ino); | |
13cd2184 N |
1215 | if (!fp) |
1216 | return nfs_ok; | |
b700949b | 1217 | ret = nfserr_locked; |
1da177e4 | 1218 | /* Search for conflicting share reservations */ |
13cd2184 N |
1219 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
1220 | if (test_bit(deny_type, &stp->st_deny_bmap) || | |
1221 | test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) | |
1222 | goto out; | |
1da177e4 | 1223 | } |
13cd2184 N |
1224 | ret = nfs_ok; |
1225 | out: | |
1226 | put_nfs4_file(fp); | |
1227 | return ret; | |
1da177e4 LT |
1228 | } |
1229 | ||
1230 | static inline void | |
1231 | nfs4_file_downgrade(struct file *filp, unsigned int share_access) | |
1232 | { | |
1233 | if (share_access & NFS4_SHARE_ACCESS_WRITE) { | |
7eaa36e2 | 1234 | put_write_access(filp->f_path.dentry->d_inode); |
1da177e4 LT |
1235 | filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE; |
1236 | } | |
1237 | } | |
1238 | ||
1239 | /* | |
1240 | * Recall a delegation | |
1241 | */ | |
1242 | static int | |
1243 | do_recall(void *__dp) | |
1244 | { | |
1245 | struct nfs4_delegation *dp = __dp; | |
1246 | ||
47f9940c | 1247 | dp->dl_file->fi_had_conflict = true; |
1da177e4 LT |
1248 | nfsd4_cb_recall(dp); |
1249 | return 0; | |
1250 | } | |
1251 | ||
1252 | /* | |
1253 | * Spawn a thread to perform a recall on the delegation represented | |
1254 | * by the lease (file_lock) | |
1255 | * | |
1256 | * Called from break_lease() with lock_kernel() held. | |
1257 | * Note: we assume break_lease will only call this *once* for any given | |
1258 | * lease. | |
1259 | */ | |
1260 | static | |
1261 | void nfsd_break_deleg_cb(struct file_lock *fl) | |
1262 | { | |
1263 | struct nfs4_delegation *dp= (struct nfs4_delegation *)fl->fl_owner; | |
1264 | struct task_struct *t; | |
1265 | ||
1266 | dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl); | |
1267 | if (!dp) | |
1268 | return; | |
1269 | ||
1270 | /* We're assuming the state code never drops its reference | |
1271 | * without first removing the lease. Since we're in this lease | |
1272 | * callback (and since the lease code is serialized by the kernel | |
1273 | * lock) we know the server hasn't removed the lease yet, we know | |
1274 | * it's safe to take a reference: */ | |
1275 | atomic_inc(&dp->dl_count); | |
cfdcad4d | 1276 | atomic_inc(&dp->dl_client->cl_count); |
1da177e4 LT |
1277 | |
1278 | spin_lock(&recall_lock); | |
1279 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); | |
1280 | spin_unlock(&recall_lock); | |
1281 | ||
1282 | /* only place dl_time is set. protected by lock_kernel*/ | |
1283 | dp->dl_time = get_seconds(); | |
1284 | ||
0272e1fd BF |
1285 | /* |
1286 | * We don't want the locks code to timeout the lease for us; | |
1287 | * we'll remove it ourself if the delegation isn't returned | |
1288 | * in time. | |
1289 | */ | |
1290 | fl->fl_break_time = 0; | |
1da177e4 LT |
1291 | |
1292 | t = kthread_run(do_recall, dp, "%s", "nfs4_cb_recall"); | |
1293 | if (IS_ERR(t)) { | |
1294 | struct nfs4_client *clp = dp->dl_client; | |
1295 | ||
1296 | printk(KERN_INFO "NFSD: Callback thread failed for " | |
1297 | "for client (clientid %08x/%08x)\n", | |
1298 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
cfdcad4d | 1299 | put_nfs4_client(dp->dl_client); |
1da177e4 LT |
1300 | nfs4_put_delegation(dp); |
1301 | } | |
1302 | } | |
1303 | ||
1304 | /* | |
1305 | * The file_lock is being reapd. | |
1306 | * | |
1307 | * Called by locks_free_lock() with lock_kernel() held. | |
1308 | */ | |
1309 | static | |
1310 | void nfsd_release_deleg_cb(struct file_lock *fl) | |
1311 | { | |
1312 | struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; | |
1313 | ||
1314 | dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count)); | |
1315 | ||
1316 | if (!(fl->fl_flags & FL_LEASE) || !dp) | |
1317 | return; | |
1318 | dp->dl_flock = NULL; | |
1319 | } | |
1320 | ||
1321 | /* | |
1322 | * Set the delegation file_lock back pointer. | |
1323 | * | |
a9933cea | 1324 | * Called from setlease() with lock_kernel() held. |
1da177e4 LT |
1325 | */ |
1326 | static | |
1327 | void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl) | |
1328 | { | |
1329 | struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner; | |
1330 | ||
1331 | dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp); | |
1332 | if (!dp) | |
1333 | return; | |
1334 | dp->dl_flock = new; | |
1335 | } | |
1336 | ||
1337 | /* | |
a9933cea | 1338 | * Called from setlease() with lock_kernel() held |
1da177e4 LT |
1339 | */ |
1340 | static | |
1341 | int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try) | |
1342 | { | |
1343 | struct nfs4_delegation *onlistd = | |
1344 | (struct nfs4_delegation *)onlist->fl_owner; | |
1345 | struct nfs4_delegation *tryd = | |
1346 | (struct nfs4_delegation *)try->fl_owner; | |
1347 | ||
1348 | if (onlist->fl_lmops != try->fl_lmops) | |
1349 | return 0; | |
1350 | ||
1351 | return onlistd->dl_client == tryd->dl_client; | |
1352 | } | |
1353 | ||
1354 | ||
1355 | static | |
1356 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
1357 | { | |
1358 | if (arg & F_UNLCK) | |
1359 | return lease_modify(onlist, arg); | |
1360 | else | |
1361 | return -EAGAIN; | |
1362 | } | |
1363 | ||
fd39ca9a | 1364 | static struct lock_manager_operations nfsd_lease_mng_ops = { |
1da177e4 LT |
1365 | .fl_break = nfsd_break_deleg_cb, |
1366 | .fl_release_private = nfsd_release_deleg_cb, | |
1367 | .fl_copy_lock = nfsd_copy_lock_deleg_cb, | |
1368 | .fl_mylease = nfsd_same_client_deleg_cb, | |
1369 | .fl_change = nfsd_change_deleg_cb, | |
1370 | }; | |
1371 | ||
1372 | ||
b37ad28b | 1373 | __be32 |
1da177e4 LT |
1374 | nfsd4_process_open1(struct nfsd4_open *open) |
1375 | { | |
1da177e4 LT |
1376 | clientid_t *clientid = &open->op_clientid; |
1377 | struct nfs4_client *clp = NULL; | |
1378 | unsigned int strhashval; | |
1379 | struct nfs4_stateowner *sop = NULL; | |
1380 | ||
1da177e4 | 1381 | if (!check_name(open->op_owner)) |
0f442aa2 | 1382 | return nfserr_inval; |
1da177e4 LT |
1383 | |
1384 | if (STALE_CLIENTID(&open->op_clientid)) | |
1385 | return nfserr_stale_clientid; | |
1386 | ||
1387 | strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner); | |
1388 | sop = find_openstateowner_str(strhashval, open); | |
0f442aa2 BF |
1389 | open->op_stateowner = sop; |
1390 | if (!sop) { | |
1391 | /* Make sure the client's lease hasn't expired. */ | |
1da177e4 LT |
1392 | clp = find_confirmed_client(clientid); |
1393 | if (clp == NULL) | |
0f442aa2 BF |
1394 | return nfserr_expired; |
1395 | goto renew; | |
1da177e4 | 1396 | } |
0f442aa2 BF |
1397 | if (!sop->so_confirmed) { |
1398 | /* Replace unconfirmed owners without checking for replay. */ | |
1399 | clp = sop->so_client; | |
1400 | release_stateowner(sop); | |
1401 | open->op_stateowner = NULL; | |
1402 | goto renew; | |
1403 | } | |
1404 | if (open->op_seqid == sop->so_seqid - 1) { | |
1405 | if (sop->so_replay.rp_buflen) | |
a90b061c | 1406 | return nfserr_replay_me; |
0f442aa2 BF |
1407 | /* The original OPEN failed so spectacularly |
1408 | * that we don't even have replay data saved! | |
1409 | * Therefore, we have no choice but to continue | |
1410 | * processing this OPEN; presumably, we'll | |
1411 | * fail again for the same reason. | |
1412 | */ | |
1413 | dprintk("nfsd4_process_open1: replay with no replay cache\n"); | |
1414 | goto renew; | |
1415 | } | |
1416 | if (open->op_seqid != sop->so_seqid) | |
1417 | return nfserr_bad_seqid; | |
1da177e4 | 1418 | renew: |
0f442aa2 BF |
1419 | if (open->op_stateowner == NULL) { |
1420 | sop = alloc_init_open_stateowner(strhashval, clp, open); | |
1421 | if (sop == NULL) | |
1422 | return nfserr_resource; | |
1423 | open->op_stateowner = sop; | |
1424 | } | |
1425 | list_del_init(&sop->so_close_lru); | |
1da177e4 | 1426 | renew_client(sop->so_client); |
0f442aa2 | 1427 | return nfs_ok; |
1da177e4 LT |
1428 | } |
1429 | ||
b37ad28b | 1430 | static inline __be32 |
4a6e43e6 N |
1431 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
1432 | { | |
1433 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
1434 | return nfserr_openmode; | |
1435 | else | |
1436 | return nfs_ok; | |
1437 | } | |
1438 | ||
52f4fb43 N |
1439 | static struct nfs4_delegation * |
1440 | find_delegation_file(struct nfs4_file *fp, stateid_t *stid) | |
1441 | { | |
1442 | struct nfs4_delegation *dp; | |
1443 | ||
ea1da636 | 1444 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) { |
52f4fb43 N |
1445 | if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) |
1446 | return dp; | |
1447 | } | |
1448 | return NULL; | |
1449 | } | |
1450 | ||
b37ad28b | 1451 | static __be32 |
567d9829 N |
1452 | nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, |
1453 | struct nfs4_delegation **dp) | |
1454 | { | |
1455 | int flags; | |
b37ad28b | 1456 | __be32 status = nfserr_bad_stateid; |
567d9829 N |
1457 | |
1458 | *dp = find_delegation_file(fp, &open->op_delegate_stateid); | |
1459 | if (*dp == NULL) | |
c44c5eeb | 1460 | goto out; |
567d9829 N |
1461 | flags = open->op_share_access == NFS4_SHARE_ACCESS_READ ? |
1462 | RD_STATE : WR_STATE; | |
1463 | status = nfs4_check_delegmode(*dp, flags); | |
1464 | if (status) | |
1465 | *dp = NULL; | |
c44c5eeb N |
1466 | out: |
1467 | if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
1468 | return nfs_ok; | |
1469 | if (status) | |
1470 | return status; | |
1471 | open->op_stateowner->so_confirmed = 1; | |
1472 | return nfs_ok; | |
567d9829 N |
1473 | } |
1474 | ||
b37ad28b | 1475 | static __be32 |
1da177e4 LT |
1476 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) |
1477 | { | |
1478 | struct nfs4_stateid *local; | |
b37ad28b | 1479 | __be32 status = nfserr_share_denied; |
1da177e4 LT |
1480 | struct nfs4_stateowner *sop = open->op_stateowner; |
1481 | ||
8beefa24 | 1482 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
1483 | /* ignore lock owners */ |
1484 | if (local->st_stateowner->so_is_open_owner == 0) | |
1485 | continue; | |
1486 | /* remember if we have seen this open owner */ | |
1487 | if (local->st_stateowner == sop) | |
1488 | *stpp = local; | |
1489 | /* check for conflicting share reservations */ | |
1490 | if (!test_share(local, open)) | |
1491 | goto out; | |
1492 | } | |
1493 | status = 0; | |
1494 | out: | |
1495 | return status; | |
1496 | } | |
1497 | ||
5ac049ac N |
1498 | static inline struct nfs4_stateid * |
1499 | nfs4_alloc_stateid(void) | |
1500 | { | |
1501 | return kmem_cache_alloc(stateid_slab, GFP_KERNEL); | |
1502 | } | |
1503 | ||
b37ad28b | 1504 | static __be32 |
1da177e4 | 1505 | nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, |
567d9829 | 1506 | struct nfs4_delegation *dp, |
1da177e4 LT |
1507 | struct svc_fh *cur_fh, int flags) |
1508 | { | |
1509 | struct nfs4_stateid *stp; | |
1da177e4 | 1510 | |
5ac049ac | 1511 | stp = nfs4_alloc_stateid(); |
1da177e4 LT |
1512 | if (stp == NULL) |
1513 | return nfserr_resource; | |
1514 | ||
567d9829 N |
1515 | if (dp) { |
1516 | get_file(dp->dl_vfs_file); | |
1517 | stp->st_vfs_file = dp->dl_vfs_file; | |
1518 | } else { | |
b37ad28b | 1519 | __be32 status; |
567d9829 N |
1520 | status = nfsd_open(rqstp, cur_fh, S_IFREG, flags, |
1521 | &stp->st_vfs_file); | |
1522 | if (status) { | |
1523 | if (status == nfserr_dropit) | |
1524 | status = nfserr_jukebox; | |
5ac049ac | 1525 | kmem_cache_free(stateid_slab, stp); |
567d9829 N |
1526 | return status; |
1527 | } | |
1da177e4 | 1528 | } |
1da177e4 LT |
1529 | *stpp = stp; |
1530 | return 0; | |
1531 | } | |
1532 | ||
b37ad28b | 1533 | static inline __be32 |
1da177e4 LT |
1534 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
1535 | struct nfsd4_open *open) | |
1536 | { | |
1537 | struct iattr iattr = { | |
1538 | .ia_valid = ATTR_SIZE, | |
1539 | .ia_size = 0, | |
1540 | }; | |
1541 | if (!open->op_truncate) | |
1542 | return 0; | |
1543 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 1544 | return nfserr_inval; |
1da177e4 LT |
1545 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
1546 | } | |
1547 | ||
b37ad28b | 1548 | static __be32 |
1da177e4 LT |
1549 | nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open) |
1550 | { | |
1551 | struct file *filp = stp->st_vfs_file; | |
7eaa36e2 | 1552 | struct inode *inode = filp->f_path.dentry->d_inode; |
6c26d08f | 1553 | unsigned int share_access, new_writer; |
b37ad28b | 1554 | __be32 status; |
1da177e4 LT |
1555 | |
1556 | set_access(&share_access, stp->st_access_bmap); | |
6c26d08f BF |
1557 | new_writer = (~share_access) & open->op_share_access |
1558 | & NFS4_SHARE_ACCESS_WRITE; | |
1da177e4 | 1559 | |
6c26d08f | 1560 | if (new_writer) { |
b37ad28b AV |
1561 | int err = get_write_access(inode); |
1562 | if (err) | |
1563 | return nfserrno(err); | |
6c26d08f | 1564 | } |
1da177e4 LT |
1565 | status = nfsd4_truncate(rqstp, cur_fh, open); |
1566 | if (status) { | |
6c26d08f BF |
1567 | if (new_writer) |
1568 | put_write_access(inode); | |
1da177e4 LT |
1569 | return status; |
1570 | } | |
1571 | /* remember the open */ | |
6c26d08f | 1572 | filp->f_mode |= open->op_share_access; |
1da177e4 LT |
1573 | set_bit(open->op_share_access, &stp->st_access_bmap); |
1574 | set_bit(open->op_share_deny, &stp->st_deny_bmap); | |
1575 | ||
1576 | return nfs_ok; | |
1577 | } | |
1578 | ||
1579 | ||
1da177e4 | 1580 | static void |
37515177 | 1581 | nfs4_set_claim_prev(struct nfsd4_open *open) |
1da177e4 | 1582 | { |
37515177 N |
1583 | open->op_stateowner->so_confirmed = 1; |
1584 | open->op_stateowner->so_client->cl_firststate = 1; | |
1da177e4 LT |
1585 | } |
1586 | ||
1587 | /* | |
1588 | * Attempt to hand out a delegation. | |
1589 | */ | |
1590 | static void | |
1591 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) | |
1592 | { | |
1593 | struct nfs4_delegation *dp; | |
1594 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
1595 | struct nfs4_callback *cb = &sop->so_client->cl_callback; | |
1596 | struct file_lock fl, *flp = &fl; | |
1597 | int status, flag = 0; | |
1598 | ||
1599 | flag = NFS4_OPEN_DELEGATE_NONE; | |
7b190fec N |
1600 | open->op_recall = 0; |
1601 | switch (open->op_claim_type) { | |
1602 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
1603 | if (!atomic_read(&cb->cb_set)) | |
1604 | open->op_recall = 1; | |
1605 | flag = open->op_delegate_type; | |
1606 | if (flag == NFS4_OPEN_DELEGATE_NONE) | |
1607 | goto out; | |
1608 | break; | |
1609 | case NFS4_OPEN_CLAIM_NULL: | |
1610 | /* Let's not give out any delegations till everyone's | |
1611 | * had the chance to reclaim theirs.... */ | |
1612 | if (nfs4_in_grace()) | |
1613 | goto out; | |
1614 | if (!atomic_read(&cb->cb_set) || !sop->so_confirmed) | |
1615 | goto out; | |
1616 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | |
1617 | flag = NFS4_OPEN_DELEGATE_WRITE; | |
1618 | else | |
1619 | flag = NFS4_OPEN_DELEGATE_READ; | |
1620 | break; | |
1621 | default: | |
1622 | goto out; | |
1623 | } | |
1da177e4 LT |
1624 | |
1625 | dp = alloc_init_deleg(sop->so_client, stp, fh, flag); | |
1626 | if (dp == NULL) { | |
1627 | flag = NFS4_OPEN_DELEGATE_NONE; | |
1628 | goto out; | |
1629 | } | |
1630 | locks_init_lock(&fl); | |
1631 | fl.fl_lmops = &nfsd_lease_mng_ops; | |
1632 | fl.fl_flags = FL_LEASE; | |
1633 | fl.fl_end = OFFSET_MAX; | |
1634 | fl.fl_owner = (fl_owner_t)dp; | |
1635 | fl.fl_file = stp->st_vfs_file; | |
1636 | fl.fl_pid = current->tgid; | |
1637 | ||
a9933cea | 1638 | /* vfs_setlease checks to see if delegation should be handed out. |
1da177e4 LT |
1639 | * the lock_manager callbacks fl_mylease and fl_change are used |
1640 | */ | |
a9933cea | 1641 | if ((status = vfs_setlease(stp->st_vfs_file, |
1da177e4 LT |
1642 | flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK, &flp))) { |
1643 | dprintk("NFSD: setlease failed [%d], no delegation\n", status); | |
c907132d | 1644 | unhash_delegation(dp); |
1da177e4 LT |
1645 | flag = NFS4_OPEN_DELEGATE_NONE; |
1646 | goto out; | |
1647 | } | |
1648 | ||
1649 | memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); | |
1650 | ||
1651 | dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n", | |
1652 | dp->dl_stateid.si_boot, | |
1653 | dp->dl_stateid.si_stateownerid, | |
1654 | dp->dl_stateid.si_fileid, | |
1655 | dp->dl_stateid.si_generation); | |
1656 | out: | |
7b190fec N |
1657 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS |
1658 | && flag == NFS4_OPEN_DELEGATE_NONE | |
1659 | && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) | |
2fdada03 | 1660 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
1da177e4 LT |
1661 | open->op_delegate_type = flag; |
1662 | } | |
1663 | ||
1664 | /* | |
1665 | * called with nfs4_lock_state() held. | |
1666 | */ | |
b37ad28b | 1667 | __be32 |
1da177e4 LT |
1668 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
1669 | { | |
1670 | struct nfs4_file *fp = NULL; | |
1671 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
1672 | struct nfs4_stateid *stp = NULL; | |
567d9829 | 1673 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 1674 | __be32 status; |
1da177e4 LT |
1675 | |
1676 | status = nfserr_inval; | |
ba5a6a19 BF |
1677 | if (!access_valid(open->op_share_access) |
1678 | || !deny_valid(open->op_share_deny)) | |
1da177e4 LT |
1679 | goto out; |
1680 | /* | |
1681 | * Lookup file; if found, lookup stateid and check open request, | |
1682 | * and check for delegations in the process of being recalled. | |
1683 | * If not found, create the nfs4_file struct | |
1684 | */ | |
1685 | fp = find_file(ino); | |
1686 | if (fp) { | |
1687 | if ((status = nfs4_check_open(fp, open, &stp))) | |
1688 | goto out; | |
c44c5eeb N |
1689 | status = nfs4_check_deleg(fp, open, &dp); |
1690 | if (status) | |
1691 | goto out; | |
1da177e4 | 1692 | } else { |
c44c5eeb N |
1693 | status = nfserr_bad_stateid; |
1694 | if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
1695 | goto out; | |
1da177e4 LT |
1696 | status = nfserr_resource; |
1697 | fp = alloc_init_file(ino); | |
1698 | if (fp == NULL) | |
1699 | goto out; | |
1700 | } | |
1701 | ||
1702 | /* | |
1703 | * OPEN the file, or upgrade an existing OPEN. | |
1704 | * If truncate fails, the OPEN fails. | |
1705 | */ | |
1706 | if (stp) { | |
1707 | /* Stateid was found, this is an OPEN upgrade */ | |
1708 | status = nfs4_upgrade_open(rqstp, current_fh, stp, open); | |
1709 | if (status) | |
1710 | goto out; | |
444c2c07 | 1711 | update_stateid(&stp->st_stateid); |
1da177e4 LT |
1712 | } else { |
1713 | /* Stateid was not found, this is a new OPEN */ | |
1714 | int flags = 0; | |
9ecb6a08 BF |
1715 | if (open->op_share_access & NFS4_SHARE_ACCESS_READ) |
1716 | flags |= MAY_READ; | |
1da177e4 | 1717 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
9ecb6a08 | 1718 | flags |= MAY_WRITE; |
567d9829 N |
1719 | status = nfs4_new_open(rqstp, &stp, dp, current_fh, flags); |
1720 | if (status) | |
1da177e4 LT |
1721 | goto out; |
1722 | init_stateid(stp, fp, open); | |
1723 | status = nfsd4_truncate(rqstp, current_fh, open); | |
1724 | if (status) { | |
1725 | release_stateid(stp, OPEN_STATE); | |
1726 | goto out; | |
1727 | } | |
1728 | } | |
1729 | memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
1730 | ||
1731 | /* | |
1732 | * Attempt to hand out a delegation. No error return, because the | |
1733 | * OPEN succeeds even if we fail. | |
1734 | */ | |
1735 | nfs4_open_delegation(current_fh, open, stp); | |
1736 | ||
1737 | status = nfs_ok; | |
1738 | ||
1739 | dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n", | |
1740 | stp->st_stateid.si_boot, stp->st_stateid.si_stateownerid, | |
1741 | stp->st_stateid.si_fileid, stp->st_stateid.si_generation); | |
1742 | out: | |
13cd2184 N |
1743 | if (fp) |
1744 | put_nfs4_file(fp); | |
37515177 N |
1745 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
1746 | nfs4_set_claim_prev(open); | |
1da177e4 LT |
1747 | /* |
1748 | * To finish the open response, we just need to set the rflags. | |
1749 | */ | |
1750 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
1751 | if (!open->op_stateowner->so_confirmed) | |
1752 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; | |
1753 | ||
1754 | return status; | |
1755 | } | |
1756 | ||
58da282b | 1757 | static struct workqueue_struct *laundry_wq; |
c4028958 DH |
1758 | static void laundromat_main(struct work_struct *); |
1759 | static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); | |
1da177e4 | 1760 | |
b37ad28b | 1761 | __be32 |
b591480b BF |
1762 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
1763 | clientid_t *clid) | |
1da177e4 LT |
1764 | { |
1765 | struct nfs4_client *clp; | |
b37ad28b | 1766 | __be32 status; |
1da177e4 LT |
1767 | |
1768 | nfs4_lock_state(); | |
1769 | dprintk("process_renew(%08x/%08x): starting\n", | |
1770 | clid->cl_boot, clid->cl_id); | |
1771 | status = nfserr_stale_clientid; | |
1772 | if (STALE_CLIENTID(clid)) | |
1773 | goto out; | |
1774 | clp = find_confirmed_client(clid); | |
1775 | status = nfserr_expired; | |
1776 | if (clp == NULL) { | |
1777 | /* We assume the client took too long to RENEW. */ | |
1778 | dprintk("nfsd4_renew: clientid not found!\n"); | |
1779 | goto out; | |
1780 | } | |
1781 | renew_client(clp); | |
1782 | status = nfserr_cb_path_down; | |
ea1da636 | 1783 | if (!list_empty(&clp->cl_delegations) |
1da177e4 LT |
1784 | && !atomic_read(&clp->cl_callback.cb_set)) |
1785 | goto out; | |
1786 | status = nfs_ok; | |
1787 | out: | |
1788 | nfs4_unlock_state(); | |
1789 | return status; | |
1790 | } | |
1791 | ||
a76b4319 N |
1792 | static void |
1793 | end_grace(void) | |
1794 | { | |
1795 | dprintk("NFSD: end of grace period\n"); | |
c7b9a459 | 1796 | nfsd4_recdir_purge_old(); |
a76b4319 N |
1797 | in_grace = 0; |
1798 | } | |
1799 | ||
fd39ca9a | 1800 | static time_t |
1da177e4 LT |
1801 | nfs4_laundromat(void) |
1802 | { | |
1803 | struct nfs4_client *clp; | |
1804 | struct nfs4_stateowner *sop; | |
1805 | struct nfs4_delegation *dp; | |
1806 | struct list_head *pos, *next, reaplist; | |
1807 | time_t cutoff = get_seconds() - NFSD_LEASE_TIME; | |
1808 | time_t t, clientid_val = NFSD_LEASE_TIME; | |
1809 | time_t u, test_val = NFSD_LEASE_TIME; | |
1810 | ||
1811 | nfs4_lock_state(); | |
1812 | ||
1813 | dprintk("NFSD: laundromat service - starting\n"); | |
a76b4319 N |
1814 | if (in_grace) |
1815 | end_grace(); | |
1da177e4 LT |
1816 | list_for_each_safe(pos, next, &client_lru) { |
1817 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1818 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
1819 | t = clp->cl_time - cutoff; | |
1820 | if (clientid_val > t) | |
1821 | clientid_val = t; | |
1822 | break; | |
1823 | } | |
1824 | dprintk("NFSD: purging unused client (clientid %08x)\n", | |
1825 | clp->cl_clientid.cl_id); | |
c7b9a459 | 1826 | nfsd4_remove_clid_dir(clp); |
1da177e4 LT |
1827 | expire_client(clp); |
1828 | } | |
1829 | INIT_LIST_HEAD(&reaplist); | |
1830 | spin_lock(&recall_lock); | |
1831 | list_for_each_safe(pos, next, &del_recall_lru) { | |
1832 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
1833 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
1834 | u = dp->dl_time - cutoff; | |
1835 | if (test_val > u) | |
1836 | test_val = u; | |
1837 | break; | |
1838 | } | |
1839 | dprintk("NFSD: purging unused delegation dp %p, fp %p\n", | |
1840 | dp, dp->dl_flock); | |
1841 | list_move(&dp->dl_recall_lru, &reaplist); | |
1842 | } | |
1843 | spin_unlock(&recall_lock); | |
1844 | list_for_each_safe(pos, next, &reaplist) { | |
1845 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
1846 | list_del_init(&dp->dl_recall_lru); | |
1847 | unhash_delegation(dp); | |
1848 | } | |
1849 | test_val = NFSD_LEASE_TIME; | |
1850 | list_for_each_safe(pos, next, &close_lru) { | |
1851 | sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); | |
1852 | if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { | |
1853 | u = sop->so_time - cutoff; | |
1854 | if (test_val > u) | |
1855 | test_val = u; | |
1856 | break; | |
1857 | } | |
1858 | dprintk("NFSD: purging unused open stateowner (so_id %d)\n", | |
1859 | sop->so_id); | |
358dd55a | 1860 | release_stateowner(sop); |
1da177e4 LT |
1861 | } |
1862 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
1863 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
1864 | nfs4_unlock_state(); | |
1865 | return clientid_val; | |
1866 | } | |
1867 | ||
1868 | void | |
c4028958 | 1869 | laundromat_main(struct work_struct *not_used) |
1da177e4 LT |
1870 | { |
1871 | time_t t; | |
1872 | ||
1873 | t = nfs4_laundromat(); | |
1874 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); | |
58da282b | 1875 | queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); |
1da177e4 LT |
1876 | } |
1877 | ||
fd39ca9a | 1878 | static struct nfs4_stateowner * |
f8816512 N |
1879 | search_close_lru(u32 st_id, int flags) |
1880 | { | |
1da177e4 LT |
1881 | struct nfs4_stateowner *local = NULL; |
1882 | ||
1da177e4 LT |
1883 | if (flags & CLOSE_STATE) { |
1884 | list_for_each_entry(local, &close_lru, so_close_lru) { | |
1885 | if (local->so_id == st_id) | |
1886 | return local; | |
1887 | } | |
1888 | } | |
1889 | return NULL; | |
1890 | } | |
1891 | ||
1892 | static inline int | |
1893 | nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) | |
1894 | { | |
7eaa36e2 | 1895 | return fhp->fh_dentry->d_inode != stp->st_vfs_file->f_path.dentry->d_inode; |
1da177e4 LT |
1896 | } |
1897 | ||
1898 | static int | |
1899 | STALE_STATEID(stateid_t *stateid) | |
1900 | { | |
1901 | if (stateid->si_boot == boot_time) | |
1902 | return 0; | |
849823c5 | 1903 | dprintk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n", |
1da177e4 LT |
1904 | stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, |
1905 | stateid->si_generation); | |
1906 | return 1; | |
1907 | } | |
1908 | ||
1909 | static inline int | |
1910 | access_permit_read(unsigned long access_bmap) | |
1911 | { | |
1912 | return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || | |
1913 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || | |
1914 | test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); | |
1915 | } | |
1916 | ||
1917 | static inline int | |
1918 | access_permit_write(unsigned long access_bmap) | |
1919 | { | |
1920 | return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || | |
1921 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); | |
1922 | } | |
1923 | ||
1924 | static | |
b37ad28b | 1925 | __be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags) |
1da177e4 | 1926 | { |
b37ad28b | 1927 | __be32 status = nfserr_openmode; |
1da177e4 LT |
1928 | |
1929 | if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) | |
1930 | goto out; | |
1931 | if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) | |
1932 | goto out; | |
1933 | status = nfs_ok; | |
1934 | out: | |
1935 | return status; | |
1936 | } | |
1937 | ||
b37ad28b | 1938 | static inline __be32 |
1da177e4 LT |
1939 | check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) |
1940 | { | |
1941 | /* Trying to call delegreturn with a special stateid? Yuch: */ | |
1942 | if (!(flags & (RD_STATE | WR_STATE))) | |
1943 | return nfserr_bad_stateid; | |
1944 | else if (ONE_STATEID(stateid) && (flags & RD_STATE)) | |
1945 | return nfs_ok; | |
1946 | else if (nfs4_in_grace()) { | |
1947 | /* Answer in remaining cases depends on existance of | |
1948 | * conflicting state; so we must wait out the grace period. */ | |
1949 | return nfserr_grace; | |
1950 | } else if (flags & WR_STATE) | |
1951 | return nfs4_share_conflict(current_fh, | |
1952 | NFS4_SHARE_DENY_WRITE); | |
1953 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
1954 | return nfs4_share_conflict(current_fh, | |
1955 | NFS4_SHARE_DENY_READ); | |
1956 | } | |
1957 | ||
1958 | /* | |
1959 | * Allow READ/WRITE during grace period on recovered state only for files | |
1960 | * that are not able to provide mandatory locking. | |
1961 | */ | |
1962 | static inline int | |
1963 | io_during_grace_disallowed(struct inode *inode, int flags) | |
1964 | { | |
1965 | return nfs4_in_grace() && (flags & (RD_STATE | WR_STATE)) | |
a16877ca | 1966 | && mandatory_lock(inode); |
1da177e4 LT |
1967 | } |
1968 | ||
1969 | /* | |
1970 | * Checks for stateid operations | |
1971 | */ | |
b37ad28b | 1972 | __be32 |
1da177e4 LT |
1973 | nfs4_preprocess_stateid_op(struct svc_fh *current_fh, stateid_t *stateid, int flags, struct file **filpp) |
1974 | { | |
1975 | struct nfs4_stateid *stp = NULL; | |
1976 | struct nfs4_delegation *dp = NULL; | |
1977 | stateid_t *stidp; | |
1978 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
b37ad28b | 1979 | __be32 status; |
1da177e4 LT |
1980 | |
1981 | dprintk("NFSD: preprocess_stateid_op: stateid = (%08x/%08x/%08x/%08x)\n", | |
1982 | stateid->si_boot, stateid->si_stateownerid, | |
1983 | stateid->si_fileid, stateid->si_generation); | |
1984 | if (filpp) | |
1985 | *filpp = NULL; | |
1986 | ||
1987 | if (io_during_grace_disallowed(ino, flags)) | |
1988 | return nfserr_grace; | |
1989 | ||
1990 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
1991 | return check_special_stateids(current_fh, stateid, flags); | |
1992 | ||
1993 | /* STALE STATEID */ | |
1994 | status = nfserr_stale_stateid; | |
1995 | if (STALE_STATEID(stateid)) | |
1996 | goto out; | |
1997 | ||
1998 | /* BAD STATEID */ | |
1999 | status = nfserr_bad_stateid; | |
2000 | if (!stateid->si_fileid) { /* delegation stateid */ | |
2001 | if(!(dp = find_delegation_stateid(ino, stateid))) { | |
2002 | dprintk("NFSD: delegation stateid not found\n"); | |
1da177e4 LT |
2003 | goto out; |
2004 | } | |
2005 | stidp = &dp->dl_stateid; | |
2006 | } else { /* open or lock stateid */ | |
2007 | if (!(stp = find_stateid(stateid, flags))) { | |
2008 | dprintk("NFSD: open or lock stateid not found\n"); | |
1da177e4 LT |
2009 | goto out; |
2010 | } | |
2011 | if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp)) | |
2012 | goto out; | |
2013 | if (!stp->st_stateowner->so_confirmed) | |
2014 | goto out; | |
2015 | stidp = &stp->st_stateid; | |
2016 | } | |
2017 | if (stateid->si_generation > stidp->si_generation) | |
2018 | goto out; | |
2019 | ||
2020 | /* OLD STATEID */ | |
2021 | status = nfserr_old_stateid; | |
2022 | if (stateid->si_generation < stidp->si_generation) | |
2023 | goto out; | |
2024 | if (stp) { | |
2025 | if ((status = nfs4_check_openmode(stp,flags))) | |
2026 | goto out; | |
2027 | renew_client(stp->st_stateowner->so_client); | |
2028 | if (filpp) | |
2029 | *filpp = stp->st_vfs_file; | |
2030 | } else if (dp) { | |
2031 | if ((status = nfs4_check_delegmode(dp, flags))) | |
2032 | goto out; | |
2033 | renew_client(dp->dl_client); | |
2034 | if (flags & DELEG_RET) | |
2035 | unhash_delegation(dp); | |
2036 | if (filpp) | |
2037 | *filpp = dp->dl_vfs_file; | |
2038 | } | |
2039 | status = nfs_ok; | |
2040 | out: | |
2041 | return status; | |
2042 | } | |
2043 | ||
4c4cd222 N |
2044 | static inline int |
2045 | setlkflg (int type) | |
2046 | { | |
2047 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
2048 | RD_STATE : WR_STATE; | |
2049 | } | |
1da177e4 LT |
2050 | |
2051 | /* | |
2052 | * Checks for sequence id mutating operations. | |
2053 | */ | |
b37ad28b | 2054 | static __be32 |
4c4cd222 | 2055 | nfs4_preprocess_seqid_op(struct svc_fh *current_fh, u32 seqid, stateid_t *stateid, int flags, struct nfs4_stateowner **sopp, struct nfs4_stateid **stpp, struct nfsd4_lock *lock) |
1da177e4 | 2056 | { |
1da177e4 LT |
2057 | struct nfs4_stateid *stp; |
2058 | struct nfs4_stateowner *sop; | |
2059 | ||
2060 | dprintk("NFSD: preprocess_seqid_op: seqid=%d " | |
2061 | "stateid = (%08x/%08x/%08x/%08x)\n", seqid, | |
2062 | stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, | |
2063 | stateid->si_generation); | |
3a4f98bb | 2064 | |
1da177e4 LT |
2065 | *stpp = NULL; |
2066 | *sopp = NULL; | |
2067 | ||
1da177e4 | 2068 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { |
2fdada03 | 2069 | dprintk("NFSD: preprocess_seqid_op: magic stateid!\n"); |
3a4f98bb | 2070 | return nfserr_bad_stateid; |
1da177e4 LT |
2071 | } |
2072 | ||
1da177e4 | 2073 | if (STALE_STATEID(stateid)) |
3a4f98bb | 2074 | return nfserr_stale_stateid; |
1da177e4 LT |
2075 | /* |
2076 | * We return BAD_STATEID if filehandle doesn't match stateid, | |
2077 | * the confirmed flag is incorrecly set, or the generation | |
2078 | * number is incorrect. | |
1da177e4 | 2079 | */ |
f8816512 N |
2080 | stp = find_stateid(stateid, flags); |
2081 | if (stp == NULL) { | |
2082 | /* | |
2083 | * Also, we should make sure this isn't just the result of | |
2084 | * a replayed close: | |
2085 | */ | |
2086 | sop = search_close_lru(stateid->si_stateownerid, flags); | |
2087 | if (sop == NULL) | |
2088 | return nfserr_bad_stateid; | |
2089 | *sopp = sop; | |
2090 | goto check_replay; | |
2091 | } | |
1da177e4 | 2092 | |
4c4cd222 | 2093 | if (lock) { |
1da177e4 | 2094 | struct nfs4_stateowner *sop = stp->st_stateowner; |
4c4cd222 | 2095 | clientid_t *lockclid = &lock->v.new.clientid; |
1da177e4 | 2096 | struct nfs4_client *clp = sop->so_client; |
4c4cd222 | 2097 | int lkflg = 0; |
b37ad28b | 2098 | __be32 status; |
4c4cd222 N |
2099 | |
2100 | lkflg = setlkflg(lock->lk_type); | |
2101 | ||
2102 | if (lock->lk_is_new) { | |
599e0a22 BF |
2103 | if (!sop->so_is_open_owner) |
2104 | return nfserr_bad_stateid; | |
2105 | if (!same_clid(&clp->cl_clientid, lockclid)) | |
4c4cd222 | 2106 | return nfserr_bad_stateid; |
599e0a22 BF |
2107 | /* stp is the open stateid */ |
2108 | status = nfs4_check_openmode(stp, lkflg); | |
2109 | if (status) | |
2110 | return status; | |
2111 | } else { | |
2112 | /* stp is the lock stateid */ | |
2113 | status = nfs4_check_openmode(stp->st_openstp, lkflg); | |
2114 | if (status) | |
2115 | return status; | |
4c4cd222 | 2116 | } |
1da177e4 LT |
2117 | } |
2118 | ||
2119 | if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp)) { | |
2fdada03 | 2120 | dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); |
3a4f98bb | 2121 | return nfserr_bad_stateid; |
1da177e4 LT |
2122 | } |
2123 | ||
2124 | *stpp = stp; | |
2125 | *sopp = sop = stp->st_stateowner; | |
2126 | ||
2127 | /* | |
2128 | * We now validate the seqid and stateid generation numbers. | |
2129 | * For the moment, we ignore the possibility of | |
2130 | * generation number wraparound. | |
2131 | */ | |
bd9aac52 | 2132 | if (seqid != sop->so_seqid) |
1da177e4 LT |
2133 | goto check_replay; |
2134 | ||
3a4f98bb | 2135 | if (sop->so_confirmed && flags & CONFIRM) { |
2fdada03 | 2136 | dprintk("NFSD: preprocess_seqid_op: expected" |
3a4f98bb N |
2137 | " unconfirmed stateowner!\n"); |
2138 | return nfserr_bad_stateid; | |
1da177e4 | 2139 | } |
3a4f98bb | 2140 | if (!sop->so_confirmed && !(flags & CONFIRM)) { |
2fdada03 | 2141 | dprintk("NFSD: preprocess_seqid_op: stateowner not" |
3a4f98bb N |
2142 | " confirmed yet!\n"); |
2143 | return nfserr_bad_stateid; | |
1da177e4 LT |
2144 | } |
2145 | if (stateid->si_generation > stp->st_stateid.si_generation) { | |
2fdada03 | 2146 | dprintk("NFSD: preprocess_seqid_op: future stateid?!\n"); |
3a4f98bb | 2147 | return nfserr_bad_stateid; |
1da177e4 LT |
2148 | } |
2149 | ||
1da177e4 | 2150 | if (stateid->si_generation < stp->st_stateid.si_generation) { |
2fdada03 | 2151 | dprintk("NFSD: preprocess_seqid_op: old stateid!\n"); |
3a4f98bb | 2152 | return nfserr_old_stateid; |
1da177e4 | 2153 | } |
52fd004e | 2154 | renew_client(sop->so_client); |
3a4f98bb | 2155 | return nfs_ok; |
1da177e4 | 2156 | |
1da177e4 | 2157 | check_replay: |
bd9aac52 | 2158 | if (seqid == sop->so_seqid - 1) { |
849823c5 | 2159 | dprintk("NFSD: preprocess_seqid_op: retransmission?\n"); |
1da177e4 | 2160 | /* indicate replay to calling function */ |
a90b061c | 2161 | return nfserr_replay_me; |
1da177e4 | 2162 | } |
2fdada03 | 2163 | dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n", |
3a4f98bb N |
2164 | sop->so_seqid, seqid); |
2165 | *sopp = NULL; | |
2166 | return nfserr_bad_seqid; | |
1da177e4 LT |
2167 | } |
2168 | ||
b37ad28b | 2169 | __be32 |
ca364317 | 2170 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 2171 | struct nfsd4_open_confirm *oc) |
1da177e4 | 2172 | { |
b37ad28b | 2173 | __be32 status; |
1da177e4 LT |
2174 | struct nfs4_stateowner *sop; |
2175 | struct nfs4_stateid *stp; | |
2176 | ||
2177 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | |
ca364317 BF |
2178 | (int)cstate->current_fh.fh_dentry->d_name.len, |
2179 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 2180 | |
ca364317 | 2181 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
2182 | if (status) |
2183 | return status; | |
1da177e4 LT |
2184 | |
2185 | nfs4_lock_state(); | |
2186 | ||
ca364317 BF |
2187 | if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
2188 | oc->oc_seqid, &oc->oc_req_stateid, | |
1da177e4 LT |
2189 | CHECK_FH | CONFIRM | OPEN_STATE, |
2190 | &oc->oc_stateowner, &stp, NULL))) | |
2191 | goto out; | |
2192 | ||
2193 | sop = oc->oc_stateowner; | |
2194 | sop->so_confirmed = 1; | |
2195 | update_stateid(&stp->st_stateid); | |
2196 | memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2197 | dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d " | |
2198 | "stateid=(%08x/%08x/%08x/%08x)\n", oc->oc_seqid, | |
2199 | stp->st_stateid.si_boot, | |
2200 | stp->st_stateid.si_stateownerid, | |
2201 | stp->st_stateid.si_fileid, | |
2202 | stp->st_stateid.si_generation); | |
c7b9a459 N |
2203 | |
2204 | nfsd4_create_clid_dir(sop->so_client); | |
1da177e4 | 2205 | out: |
f2327d9a | 2206 | if (oc->oc_stateowner) { |
1da177e4 | 2207 | nfs4_get_stateowner(oc->oc_stateowner); |
a4f1706a | 2208 | cstate->replay_owner = oc->oc_stateowner; |
f2327d9a | 2209 | } |
1da177e4 LT |
2210 | nfs4_unlock_state(); |
2211 | return status; | |
2212 | } | |
2213 | ||
2214 | ||
2215 | /* | |
2216 | * unset all bits in union bitmap (bmap) that | |
2217 | * do not exist in share (from successful OPEN_DOWNGRADE) | |
2218 | */ | |
2219 | static void | |
2220 | reset_union_bmap_access(unsigned long access, unsigned long *bmap) | |
2221 | { | |
2222 | int i; | |
2223 | for (i = 1; i < 4; i++) { | |
2224 | if ((i & access) != i) | |
2225 | __clear_bit(i, bmap); | |
2226 | } | |
2227 | } | |
2228 | ||
2229 | static void | |
2230 | reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) | |
2231 | { | |
2232 | int i; | |
2233 | for (i = 0; i < 4; i++) { | |
2234 | if ((i & deny) != i) | |
2235 | __clear_bit(i, bmap); | |
2236 | } | |
2237 | } | |
2238 | ||
b37ad28b | 2239 | __be32 |
ca364317 BF |
2240 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
2241 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 2242 | struct nfsd4_open_downgrade *od) |
1da177e4 | 2243 | { |
b37ad28b | 2244 | __be32 status; |
1da177e4 LT |
2245 | struct nfs4_stateid *stp; |
2246 | unsigned int share_access; | |
2247 | ||
2248 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | |
ca364317 BF |
2249 | (int)cstate->current_fh.fh_dentry->d_name.len, |
2250 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 2251 | |
ba5a6a19 BF |
2252 | if (!access_valid(od->od_share_access) |
2253 | || !deny_valid(od->od_share_deny)) | |
1da177e4 LT |
2254 | return nfserr_inval; |
2255 | ||
2256 | nfs4_lock_state(); | |
ca364317 BF |
2257 | if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
2258 | od->od_seqid, | |
1da177e4 LT |
2259 | &od->od_stateid, |
2260 | CHECK_FH | OPEN_STATE, | |
2261 | &od->od_stateowner, &stp, NULL))) | |
2262 | goto out; | |
2263 | ||
2264 | status = nfserr_inval; | |
2265 | if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { | |
2266 | dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
2267 | stp->st_access_bmap, od->od_share_access); | |
2268 | goto out; | |
2269 | } | |
2270 | if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { | |
2271 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", | |
2272 | stp->st_deny_bmap, od->od_share_deny); | |
2273 | goto out; | |
2274 | } | |
2275 | set_access(&share_access, stp->st_access_bmap); | |
2276 | nfs4_file_downgrade(stp->st_vfs_file, | |
2277 | share_access & ~od->od_share_access); | |
2278 | ||
2279 | reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap); | |
2280 | reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); | |
2281 | ||
2282 | update_stateid(&stp->st_stateid); | |
2283 | memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2284 | status = nfs_ok; | |
2285 | out: | |
f2327d9a | 2286 | if (od->od_stateowner) { |
1da177e4 | 2287 | nfs4_get_stateowner(od->od_stateowner); |
a4f1706a | 2288 | cstate->replay_owner = od->od_stateowner; |
f2327d9a | 2289 | } |
1da177e4 LT |
2290 | nfs4_unlock_state(); |
2291 | return status; | |
2292 | } | |
2293 | ||
2294 | /* | |
2295 | * nfs4_unlock_state() called after encode | |
2296 | */ | |
b37ad28b | 2297 | __be32 |
ca364317 | 2298 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 2299 | struct nfsd4_close *close) |
1da177e4 | 2300 | { |
b37ad28b | 2301 | __be32 status; |
1da177e4 LT |
2302 | struct nfs4_stateid *stp; |
2303 | ||
2304 | dprintk("NFSD: nfsd4_close on file %.*s\n", | |
ca364317 BF |
2305 | (int)cstate->current_fh.fh_dentry->d_name.len, |
2306 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 LT |
2307 | |
2308 | nfs4_lock_state(); | |
2309 | /* check close_lru for replay */ | |
ca364317 BF |
2310 | if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
2311 | close->cl_seqid, | |
1da177e4 LT |
2312 | &close->cl_stateid, |
2313 | CHECK_FH | OPEN_STATE | CLOSE_STATE, | |
2314 | &close->cl_stateowner, &stp, NULL))) | |
2315 | goto out; | |
1da177e4 LT |
2316 | status = nfs_ok; |
2317 | update_stateid(&stp->st_stateid); | |
2318 | memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2319 | ||
04ef5954 BF |
2320 | /* release_stateid() calls nfsd_close() if needed */ |
2321 | release_stateid(stp, OPEN_STATE); | |
2322 | ||
2323 | /* place unused nfs4_stateowners on so_close_lru list to be | |
2324 | * released by the laundromat service after the lease period | |
2325 | * to enable us to handle CLOSE replay | |
2326 | */ | |
2327 | if (list_empty(&close->cl_stateowner->so_stateids)) | |
2328 | move_to_close_lru(close->cl_stateowner); | |
1da177e4 | 2329 | out: |
f2327d9a | 2330 | if (close->cl_stateowner) { |
1da177e4 | 2331 | nfs4_get_stateowner(close->cl_stateowner); |
a4f1706a | 2332 | cstate->replay_owner = close->cl_stateowner; |
f2327d9a | 2333 | } |
1da177e4 LT |
2334 | nfs4_unlock_state(); |
2335 | return status; | |
2336 | } | |
2337 | ||
b37ad28b | 2338 | __be32 |
ca364317 BF |
2339 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2340 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 2341 | { |
b37ad28b | 2342 | __be32 status; |
1da177e4 | 2343 | |
ca364317 | 2344 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 LT |
2345 | goto out; |
2346 | ||
2347 | nfs4_lock_state(); | |
ca364317 BF |
2348 | status = nfs4_preprocess_stateid_op(&cstate->current_fh, |
2349 | &dr->dr_stateid, DELEG_RET, NULL); | |
1da177e4 LT |
2350 | nfs4_unlock_state(); |
2351 | out: | |
2352 | return status; | |
2353 | } | |
2354 | ||
2355 | ||
2356 | /* | |
2357 | * Lock owner state (byte-range locks) | |
2358 | */ | |
2359 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) | |
2360 | #define LOCK_HASH_BITS 8 | |
2361 | #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) | |
2362 | #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) | |
2363 | ||
2364 | #define lockownerid_hashval(id) \ | |
2365 | ((id) & LOCK_HASH_MASK) | |
2366 | ||
2367 | static inline unsigned int | |
2368 | lock_ownerstr_hashval(struct inode *inode, u32 cl_id, | |
2369 | struct xdr_netobj *ownername) | |
2370 | { | |
2371 | return (file_hashval(inode) + cl_id | |
2372 | + opaque_hashval(ownername->data, ownername->len)) | |
2373 | & LOCK_HASH_MASK; | |
2374 | } | |
2375 | ||
2376 | static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; | |
2377 | static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; | |
2378 | static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; | |
2379 | ||
fd39ca9a | 2380 | static struct nfs4_stateid * |
1da177e4 LT |
2381 | find_stateid(stateid_t *stid, int flags) |
2382 | { | |
2383 | struct nfs4_stateid *local = NULL; | |
2384 | u32 st_id = stid->si_stateownerid; | |
2385 | u32 f_id = stid->si_fileid; | |
2386 | unsigned int hashval; | |
2387 | ||
2388 | dprintk("NFSD: find_stateid flags 0x%x\n",flags); | |
2389 | if ((flags & LOCK_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) { | |
2390 | hashval = stateid_hashval(st_id, f_id); | |
2391 | list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { | |
2392 | if ((local->st_stateid.si_stateownerid == st_id) && | |
2393 | (local->st_stateid.si_fileid == f_id)) | |
2394 | return local; | |
2395 | } | |
2396 | } | |
2397 | if ((flags & OPEN_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) { | |
2398 | hashval = stateid_hashval(st_id, f_id); | |
2399 | list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { | |
2400 | if ((local->st_stateid.si_stateownerid == st_id) && | |
2401 | (local->st_stateid.si_fileid == f_id)) | |
2402 | return local; | |
2403 | } | |
849823c5 | 2404 | } |
1da177e4 LT |
2405 | return NULL; |
2406 | } | |
2407 | ||
2408 | static struct nfs4_delegation * | |
2409 | find_delegation_stateid(struct inode *ino, stateid_t *stid) | |
2410 | { | |
13cd2184 N |
2411 | struct nfs4_file *fp; |
2412 | struct nfs4_delegation *dl; | |
1da177e4 LT |
2413 | |
2414 | dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n", | |
2415 | stid->si_boot, stid->si_stateownerid, | |
2416 | stid->si_fileid, stid->si_generation); | |
2417 | ||
1da177e4 | 2418 | fp = find_file(ino); |
13cd2184 N |
2419 | if (!fp) |
2420 | return NULL; | |
2421 | dl = find_delegation_file(fp, stid); | |
2422 | put_nfs4_file(fp); | |
2423 | return dl; | |
1da177e4 LT |
2424 | } |
2425 | ||
2426 | /* | |
2427 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
2428 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
2429 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
2430 | * locking, this prevents us from being completely protocol-compliant. The | |
2431 | * real solution to this problem is to start using unsigned file offsets in | |
2432 | * the VFS, but this is a very deep change! | |
2433 | */ | |
2434 | static inline void | |
2435 | nfs4_transform_lock_offset(struct file_lock *lock) | |
2436 | { | |
2437 | if (lock->fl_start < 0) | |
2438 | lock->fl_start = OFFSET_MAX; | |
2439 | if (lock->fl_end < 0) | |
2440 | lock->fl_end = OFFSET_MAX; | |
2441 | } | |
2442 | ||
d5b9026a N |
2443 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
2444 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
e465a77f | 2445 | static struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 2446 | }; |
1da177e4 LT |
2447 | |
2448 | static inline void | |
2449 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
2450 | { | |
d5b9026a N |
2451 | struct nfs4_stateowner *sop; |
2452 | unsigned int hval; | |
1da177e4 | 2453 | |
d5b9026a N |
2454 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
2455 | sop = (struct nfs4_stateowner *) fl->fl_owner; | |
2456 | hval = lockownerid_hashval(sop->so_id); | |
1da177e4 LT |
2457 | kref_get(&sop->so_ref); |
2458 | deny->ld_sop = sop; | |
2459 | deny->ld_clientid = sop->so_client->cl_clientid; | |
d5b9026a N |
2460 | } else { |
2461 | deny->ld_sop = NULL; | |
2462 | deny->ld_clientid.cl_boot = 0; | |
2463 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
2464 | } |
2465 | deny->ld_start = fl->fl_start; | |
2466 | deny->ld_length = ~(u64)0; | |
2467 | if (fl->fl_end != ~(u64)0) | |
2468 | deny->ld_length = fl->fl_end - fl->fl_start + 1; | |
2469 | deny->ld_type = NFS4_READ_LT; | |
2470 | if (fl->fl_type != F_RDLCK) | |
2471 | deny->ld_type = NFS4_WRITE_LT; | |
2472 | } | |
2473 | ||
1da177e4 LT |
2474 | static struct nfs4_stateowner * |
2475 | find_lockstateowner_str(struct inode *inode, clientid_t *clid, | |
2476 | struct xdr_netobj *owner) | |
2477 | { | |
2478 | unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); | |
2479 | struct nfs4_stateowner *op; | |
2480 | ||
2481 | list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { | |
599e0a22 | 2482 | if (same_owner_str(op, owner, clid)) |
1da177e4 LT |
2483 | return op; |
2484 | } | |
2485 | return NULL; | |
2486 | } | |
2487 | ||
2488 | /* | |
2489 | * Alloc a lock owner structure. | |
2490 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
2491 | * occured. | |
2492 | * | |
2493 | * strhashval = lock_ownerstr_hashval | |
1da177e4 LT |
2494 | */ |
2495 | ||
2496 | static struct nfs4_stateowner * | |
2497 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { | |
2498 | struct nfs4_stateowner *sop; | |
2499 | struct nfs4_replay *rp; | |
2500 | unsigned int idhashval; | |
2501 | ||
2502 | if (!(sop = alloc_stateowner(&lock->lk_new_owner))) | |
2503 | return NULL; | |
2504 | idhashval = lockownerid_hashval(current_ownerid); | |
2505 | INIT_LIST_HEAD(&sop->so_idhash); | |
2506 | INIT_LIST_HEAD(&sop->so_strhash); | |
2507 | INIT_LIST_HEAD(&sop->so_perclient); | |
ea1da636 N |
2508 | INIT_LIST_HEAD(&sop->so_stateids); |
2509 | INIT_LIST_HEAD(&sop->so_perstateid); | |
1da177e4 LT |
2510 | INIT_LIST_HEAD(&sop->so_close_lru); /* not used */ |
2511 | sop->so_time = 0; | |
2512 | list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); | |
2513 | list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); | |
ea1da636 | 2514 | list_add(&sop->so_perstateid, &open_stp->st_lockowners); |
1da177e4 LT |
2515 | sop->so_is_open_owner = 0; |
2516 | sop->so_id = current_ownerid++; | |
2517 | sop->so_client = clp; | |
b59e3c0e NB |
2518 | /* It is the openowner seqid that will be incremented in encode in the |
2519 | * case of new lockowners; so increment the lock seqid manually: */ | |
2520 | sop->so_seqid = lock->lk_new_lock_seqid + 1; | |
1da177e4 LT |
2521 | sop->so_confirmed = 1; |
2522 | rp = &sop->so_replay; | |
de1ae286 | 2523 | rp->rp_status = nfserr_serverfault; |
1da177e4 LT |
2524 | rp->rp_buflen = 0; |
2525 | rp->rp_buf = rp->rp_ibuf; | |
2526 | return sop; | |
2527 | } | |
2528 | ||
fd39ca9a | 2529 | static struct nfs4_stateid * |
1da177e4 LT |
2530 | alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) |
2531 | { | |
2532 | struct nfs4_stateid *stp; | |
2533 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); | |
2534 | ||
5ac049ac N |
2535 | stp = nfs4_alloc_stateid(); |
2536 | if (stp == NULL) | |
1da177e4 LT |
2537 | goto out; |
2538 | INIT_LIST_HEAD(&stp->st_hash); | |
2539 | INIT_LIST_HEAD(&stp->st_perfile); | |
ea1da636 N |
2540 | INIT_LIST_HEAD(&stp->st_perstateowner); |
2541 | INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ | |
1da177e4 | 2542 | list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); |
8beefa24 | 2543 | list_add(&stp->st_perfile, &fp->fi_stateids); |
ea1da636 | 2544 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
1da177e4 | 2545 | stp->st_stateowner = sop; |
13cd2184 | 2546 | get_nfs4_file(fp); |
1da177e4 LT |
2547 | stp->st_file = fp; |
2548 | stp->st_stateid.si_boot = boot_time; | |
2549 | stp->st_stateid.si_stateownerid = sop->so_id; | |
2550 | stp->st_stateid.si_fileid = fp->fi_id; | |
2551 | stp->st_stateid.si_generation = 0; | |
2552 | stp->st_vfs_file = open_stp->st_vfs_file; /* FIXME refcount?? */ | |
2553 | stp->st_access_bmap = open_stp->st_access_bmap; | |
2554 | stp->st_deny_bmap = open_stp->st_deny_bmap; | |
4c4cd222 | 2555 | stp->st_openstp = open_stp; |
1da177e4 LT |
2556 | |
2557 | out: | |
2558 | return stp; | |
2559 | } | |
2560 | ||
fd39ca9a | 2561 | static int |
1da177e4 LT |
2562 | check_lock_length(u64 offset, u64 length) |
2563 | { | |
2564 | return ((length == 0) || ((length != ~(u64)0) && | |
2565 | LOFF_OVERFLOW(offset, length))); | |
2566 | } | |
2567 | ||
2568 | /* | |
2569 | * LOCK operation | |
2570 | */ | |
b37ad28b | 2571 | __be32 |
ca364317 | 2572 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 2573 | struct nfsd4_lock *lock) |
1da177e4 | 2574 | { |
3e9e3dbe | 2575 | struct nfs4_stateowner *open_sop = NULL; |
b59e3c0e | 2576 | struct nfs4_stateowner *lock_sop = NULL; |
1da177e4 LT |
2577 | struct nfs4_stateid *lock_stp; |
2578 | struct file *filp; | |
2579 | struct file_lock file_lock; | |
8dc7c311 | 2580 | struct file_lock conflock; |
b37ad28b | 2581 | __be32 status = 0; |
1da177e4 | 2582 | unsigned int strhashval; |
150b3934 | 2583 | unsigned int cmd; |
b8dd7b9a | 2584 | int err; |
1da177e4 LT |
2585 | |
2586 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
2587 | (long long) lock->lk_offset, | |
2588 | (long long) lock->lk_length); | |
2589 | ||
1da177e4 LT |
2590 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
2591 | return nfserr_inval; | |
2592 | ||
ca364317 BF |
2593 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
2594 | S_IFREG, MAY_LOCK))) { | |
a6f6ef2f AA |
2595 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
2596 | return status; | |
2597 | } | |
2598 | ||
1da177e4 LT |
2599 | nfs4_lock_state(); |
2600 | ||
2601 | if (lock->lk_is_new) { | |
893f8770 N |
2602 | /* |
2603 | * Client indicates that this is a new lockowner. | |
2604 | * Use open owner and open stateid to create lock owner and | |
2605 | * lock stateid. | |
2606 | */ | |
1da177e4 LT |
2607 | struct nfs4_stateid *open_stp = NULL; |
2608 | struct nfs4_file *fp; | |
2609 | ||
2610 | status = nfserr_stale_clientid; | |
849823c5 | 2611 | if (STALE_CLIENTID(&lock->lk_new_clientid)) |
1da177e4 | 2612 | goto out; |
1da177e4 | 2613 | |
1da177e4 | 2614 | /* validate and update open stateid and open seqid */ |
ca364317 | 2615 | status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
1da177e4 LT |
2616 | lock->lk_new_open_seqid, |
2617 | &lock->lk_new_open_stateid, | |
2618 | CHECK_FH | OPEN_STATE, | |
3a65588a | 2619 | &lock->lk_replay_owner, &open_stp, |
b59e3c0e | 2620 | lock); |
37515177 | 2621 | if (status) |
1da177e4 | 2622 | goto out; |
3a65588a | 2623 | open_sop = lock->lk_replay_owner; |
1da177e4 LT |
2624 | /* create lockowner and lock stateid */ |
2625 | fp = open_stp->st_file; | |
2626 | strhashval = lock_ownerstr_hashval(fp->fi_inode, | |
2627 | open_sop->so_client->cl_clientid.cl_id, | |
2628 | &lock->v.new.owner); | |
3e9e3dbe N |
2629 | /* XXX: Do we need to check for duplicate stateowners on |
2630 | * the same file, or should they just be allowed (and | |
2631 | * create new stateids)? */ | |
1da177e4 | 2632 | status = nfserr_resource; |
b59e3c0e NB |
2633 | lock_sop = alloc_init_lock_stateowner(strhashval, |
2634 | open_sop->so_client, open_stp, lock); | |
2635 | if (lock_sop == NULL) | |
1da177e4 | 2636 | goto out; |
b59e3c0e | 2637 | lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); |
8a280510 | 2638 | if (lock_stp == NULL) |
1da177e4 | 2639 | goto out; |
1da177e4 LT |
2640 | } else { |
2641 | /* lock (lock owner + lock stateid) already exists */ | |
ca364317 | 2642 | status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
1da177e4 LT |
2643 | lock->lk_old_lock_seqid, |
2644 | &lock->lk_old_lock_stateid, | |
2645 | CHECK_FH | LOCK_STATE, | |
3a65588a | 2646 | &lock->lk_replay_owner, &lock_stp, lock); |
1da177e4 LT |
2647 | if (status) |
2648 | goto out; | |
3a65588a | 2649 | lock_sop = lock->lk_replay_owner; |
1da177e4 | 2650 | } |
3a65588a | 2651 | /* lock->lk_replay_owner and lock_stp have been created or found */ |
1da177e4 LT |
2652 | filp = lock_stp->st_vfs_file; |
2653 | ||
0dd395dc N |
2654 | status = nfserr_grace; |
2655 | if (nfs4_in_grace() && !lock->lk_reclaim) | |
2656 | goto out; | |
2657 | status = nfserr_no_grace; | |
2658 | if (!nfs4_in_grace() && lock->lk_reclaim) | |
2659 | goto out; | |
2660 | ||
1da177e4 LT |
2661 | locks_init_lock(&file_lock); |
2662 | switch (lock->lk_type) { | |
2663 | case NFS4_READ_LT: | |
2664 | case NFS4_READW_LT: | |
2665 | file_lock.fl_type = F_RDLCK; | |
150b3934 | 2666 | cmd = F_SETLK; |
1da177e4 LT |
2667 | break; |
2668 | case NFS4_WRITE_LT: | |
2669 | case NFS4_WRITEW_LT: | |
2670 | file_lock.fl_type = F_WRLCK; | |
150b3934 | 2671 | cmd = F_SETLK; |
1da177e4 LT |
2672 | break; |
2673 | default: | |
2674 | status = nfserr_inval; | |
2675 | goto out; | |
2676 | } | |
b59e3c0e | 2677 | file_lock.fl_owner = (fl_owner_t)lock_sop; |
1da177e4 LT |
2678 | file_lock.fl_pid = current->tgid; |
2679 | file_lock.fl_file = filp; | |
2680 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 2681 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
2682 | |
2683 | file_lock.fl_start = lock->lk_offset; | |
2684 | if ((lock->lk_length == ~(u64)0) || | |
2685 | LOFF_OVERFLOW(lock->lk_offset, lock->lk_length)) | |
2686 | file_lock.fl_end = ~(u64)0; | |
2687 | else | |
2688 | file_lock.fl_end = lock->lk_offset + lock->lk_length - 1; | |
2689 | nfs4_transform_lock_offset(&file_lock); | |
2690 | ||
2691 | /* | |
2692 | * Try to lock the file in the VFS. | |
2693 | * Note: locks.c uses the BKL to protect the inode's lock list. | |
2694 | */ | |
2695 | ||
eb76b3fd AA |
2696 | /* XXX?: Just to divert the locks_release_private at the start of |
2697 | * locks_copy_lock: */ | |
150b3934 | 2698 | locks_init_lock(&conflock); |
fd85b817 | 2699 | err = vfs_lock_file(filp, cmd, &file_lock, &conflock); |
b8dd7b9a | 2700 | switch (-err) { |
1da177e4 LT |
2701 | case 0: /* success! */ |
2702 | update_stateid(&lock_stp->st_stateid); | |
2703 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, | |
2704 | sizeof(stateid_t)); | |
b8dd7b9a | 2705 | status = 0; |
eb76b3fd AA |
2706 | break; |
2707 | case (EAGAIN): /* conflock holds conflicting lock */ | |
2708 | status = nfserr_denied; | |
2709 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
2710 | nfs4_set_lock_denied(&conflock, &lock->lk_denied); | |
2711 | break; | |
1da177e4 LT |
2712 | case (EDEADLK): |
2713 | status = nfserr_deadlock; | |
eb76b3fd | 2714 | break; |
1da177e4 | 2715 | default: |
fd85b817 | 2716 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
eb76b3fd AA |
2717 | status = nfserr_resource; |
2718 | break; | |
1da177e4 | 2719 | } |
1da177e4 | 2720 | out: |
8a280510 BF |
2721 | if (status && lock->lk_is_new && lock_sop) |
2722 | release_stateowner(lock_sop); | |
3a65588a BF |
2723 | if (lock->lk_replay_owner) { |
2724 | nfs4_get_stateowner(lock->lk_replay_owner); | |
a4f1706a | 2725 | cstate->replay_owner = lock->lk_replay_owner; |
f2327d9a | 2726 | } |
1da177e4 LT |
2727 | nfs4_unlock_state(); |
2728 | return status; | |
2729 | } | |
2730 | ||
2731 | /* | |
2732 | * LOCKT operation | |
2733 | */ | |
b37ad28b | 2734 | __be32 |
ca364317 BF |
2735 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2736 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
2737 | { |
2738 | struct inode *inode; | |
2739 | struct file file; | |
2740 | struct file_lock file_lock; | |
fd85b817 | 2741 | int error; |
b37ad28b | 2742 | __be32 status; |
1da177e4 LT |
2743 | |
2744 | if (nfs4_in_grace()) | |
2745 | return nfserr_grace; | |
2746 | ||
2747 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
2748 | return nfserr_inval; | |
2749 | ||
2750 | lockt->lt_stateowner = NULL; | |
2751 | nfs4_lock_state(); | |
2752 | ||
2753 | status = nfserr_stale_clientid; | |
849823c5 | 2754 | if (STALE_CLIENTID(&lockt->lt_clientid)) |
1da177e4 | 2755 | goto out; |
1da177e4 | 2756 | |
ca364317 | 2757 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) { |
849823c5 | 2758 | dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n"); |
1da177e4 LT |
2759 | if (status == nfserr_symlink) |
2760 | status = nfserr_inval; | |
2761 | goto out; | |
2762 | } | |
2763 | ||
ca364317 | 2764 | inode = cstate->current_fh.fh_dentry->d_inode; |
1da177e4 LT |
2765 | locks_init_lock(&file_lock); |
2766 | switch (lockt->lt_type) { | |
2767 | case NFS4_READ_LT: | |
2768 | case NFS4_READW_LT: | |
2769 | file_lock.fl_type = F_RDLCK; | |
2770 | break; | |
2771 | case NFS4_WRITE_LT: | |
2772 | case NFS4_WRITEW_LT: | |
2773 | file_lock.fl_type = F_WRLCK; | |
2774 | break; | |
2775 | default: | |
2fdada03 | 2776 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
2777 | status = nfserr_inval; |
2778 | goto out; | |
2779 | } | |
2780 | ||
2781 | lockt->lt_stateowner = find_lockstateowner_str(inode, | |
2782 | &lockt->lt_clientid, &lockt->lt_owner); | |
2783 | if (lockt->lt_stateowner) | |
2784 | file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; | |
2785 | file_lock.fl_pid = current->tgid; | |
2786 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 2787 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
2788 | |
2789 | file_lock.fl_start = lockt->lt_offset; | |
2790 | if ((lockt->lt_length == ~(u64)0) || LOFF_OVERFLOW(lockt->lt_offset, lockt->lt_length)) | |
2791 | file_lock.fl_end = ~(u64)0; | |
2792 | else | |
2793 | file_lock.fl_end = lockt->lt_offset + lockt->lt_length - 1; | |
2794 | ||
2795 | nfs4_transform_lock_offset(&file_lock); | |
2796 | ||
fd85b817 | 2797 | /* vfs_test_lock uses the struct file _only_ to resolve the inode. |
1da177e4 | 2798 | * since LOCKT doesn't require an OPEN, and therefore a struct |
fd85b817 | 2799 | * file may not exist, pass vfs_test_lock a struct file with |
1da177e4 LT |
2800 | * only the dentry:inode set. |
2801 | */ | |
2802 | memset(&file, 0, sizeof (struct file)); | |
ca364317 | 2803 | file.f_path.dentry = cstate->current_fh.fh_dentry; |
1da177e4 LT |
2804 | |
2805 | status = nfs_ok; | |
fd85b817 ME |
2806 | error = vfs_test_lock(&file, &file_lock); |
2807 | if (error) { | |
2808 | status = nfserrno(error); | |
2809 | goto out; | |
2810 | } | |
9d6a8c5c | 2811 | if (file_lock.fl_type != F_UNLCK) { |
1da177e4 | 2812 | status = nfserr_denied; |
9d6a8c5c | 2813 | nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); |
1da177e4 LT |
2814 | } |
2815 | out: | |
2816 | nfs4_unlock_state(); | |
2817 | return status; | |
2818 | } | |
2819 | ||
b37ad28b | 2820 | __be32 |
ca364317 | 2821 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 2822 | struct nfsd4_locku *locku) |
1da177e4 LT |
2823 | { |
2824 | struct nfs4_stateid *stp; | |
2825 | struct file *filp = NULL; | |
2826 | struct file_lock file_lock; | |
b37ad28b | 2827 | __be32 status; |
b8dd7b9a | 2828 | int err; |
1da177e4 LT |
2829 | |
2830 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", | |
2831 | (long long) locku->lu_offset, | |
2832 | (long long) locku->lu_length); | |
2833 | ||
2834 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
2835 | return nfserr_inval; | |
2836 | ||
2837 | nfs4_lock_state(); | |
2838 | ||
ca364317 | 2839 | if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
1da177e4 LT |
2840 | locku->lu_seqid, |
2841 | &locku->lu_stateid, | |
2842 | CHECK_FH | LOCK_STATE, | |
2843 | &locku->lu_stateowner, &stp, NULL))) | |
2844 | goto out; | |
2845 | ||
2846 | filp = stp->st_vfs_file; | |
2847 | BUG_ON(!filp); | |
2848 | locks_init_lock(&file_lock); | |
2849 | file_lock.fl_type = F_UNLCK; | |
2850 | file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; | |
2851 | file_lock.fl_pid = current->tgid; | |
2852 | file_lock.fl_file = filp; | |
2853 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 2854 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
2855 | file_lock.fl_start = locku->lu_offset; |
2856 | ||
2857 | if ((locku->lu_length == ~(u64)0) || LOFF_OVERFLOW(locku->lu_offset, locku->lu_length)) | |
2858 | file_lock.fl_end = ~(u64)0; | |
2859 | else | |
2860 | file_lock.fl_end = locku->lu_offset + locku->lu_length - 1; | |
2861 | nfs4_transform_lock_offset(&file_lock); | |
2862 | ||
2863 | /* | |
2864 | * Try to unlock the file in the VFS. | |
2865 | */ | |
fd85b817 | 2866 | err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); |
b8dd7b9a | 2867 | if (err) { |
fd85b817 | 2868 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
2869 | goto out_nfserr; |
2870 | } | |
2871 | /* | |
2872 | * OK, unlock succeeded; the only thing left to do is update the stateid. | |
2873 | */ | |
2874 | update_stateid(&stp->st_stateid); | |
2875 | memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2876 | ||
2877 | out: | |
f2327d9a | 2878 | if (locku->lu_stateowner) { |
1da177e4 | 2879 | nfs4_get_stateowner(locku->lu_stateowner); |
a4f1706a | 2880 | cstate->replay_owner = locku->lu_stateowner; |
f2327d9a | 2881 | } |
1da177e4 LT |
2882 | nfs4_unlock_state(); |
2883 | return status; | |
2884 | ||
2885 | out_nfserr: | |
b8dd7b9a | 2886 | status = nfserrno(err); |
1da177e4 LT |
2887 | goto out; |
2888 | } | |
2889 | ||
2890 | /* | |
2891 | * returns | |
2892 | * 1: locks held by lockowner | |
2893 | * 0: no locks held by lockowner | |
2894 | */ | |
2895 | static int | |
2896 | check_for_locks(struct file *filp, struct nfs4_stateowner *lowner) | |
2897 | { | |
2898 | struct file_lock **flpp; | |
7eaa36e2 | 2899 | struct inode *inode = filp->f_path.dentry->d_inode; |
1da177e4 LT |
2900 | int status = 0; |
2901 | ||
2902 | lock_kernel(); | |
2903 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { | |
796dadfd | 2904 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
2905 | status = 1; |
2906 | goto out; | |
796dadfd | 2907 | } |
1da177e4 LT |
2908 | } |
2909 | out: | |
2910 | unlock_kernel(); | |
2911 | return status; | |
2912 | } | |
2913 | ||
b37ad28b | 2914 | __be32 |
b591480b BF |
2915 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
2916 | struct nfsd4_compound_state *cstate, | |
2917 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
2918 | { |
2919 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe N |
2920 | struct nfs4_stateowner *sop; |
2921 | struct nfs4_stateid *stp; | |
1da177e4 | 2922 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe N |
2923 | struct list_head matches; |
2924 | int i; | |
b37ad28b | 2925 | __be32 status; |
1da177e4 LT |
2926 | |
2927 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
2928 | clid->cl_boot, clid->cl_id); | |
2929 | ||
2930 | /* XXX check for lease expiration */ | |
2931 | ||
2932 | status = nfserr_stale_clientid; | |
849823c5 | 2933 | if (STALE_CLIENTID(clid)) |
1da177e4 | 2934 | return status; |
1da177e4 LT |
2935 | |
2936 | nfs4_lock_state(); | |
2937 | ||
3e9e3dbe N |
2938 | status = nfserr_locks_held; |
2939 | /* XXX: we're doing a linear search through all the lockowners. | |
2940 | * Yipes! For now we'll just hope clients aren't really using | |
2941 | * release_lockowner much, but eventually we have to fix these | |
2942 | * data structures. */ | |
2943 | INIT_LIST_HEAD(&matches); | |
2944 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
2945 | list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { | |
599e0a22 | 2946 | if (!same_owner_str(sop, owner, clid)) |
3e9e3dbe N |
2947 | continue; |
2948 | list_for_each_entry(stp, &sop->so_stateids, | |
2949 | st_perstateowner) { | |
2950 | if (check_for_locks(stp->st_vfs_file, sop)) | |
2951 | goto out; | |
2952 | /* Note: so_perclient unused for lockowners, | |
2953 | * so it's OK to fool with here. */ | |
2954 | list_add(&sop->so_perclient, &matches); | |
2955 | } | |
1da177e4 | 2956 | } |
3e9e3dbe N |
2957 | } |
2958 | /* Clients probably won't expect us to return with some (but not all) | |
2959 | * of the lockowner state released; so don't release any until all | |
2960 | * have been checked. */ | |
2961 | status = nfs_ok; | |
0fa822e4 N |
2962 | while (!list_empty(&matches)) { |
2963 | sop = list_entry(matches.next, struct nfs4_stateowner, | |
2964 | so_perclient); | |
2965 | /* unhash_stateowner deletes so_perclient only | |
2966 | * for openowners. */ | |
2967 | list_del(&sop->so_perclient); | |
3e9e3dbe | 2968 | release_stateowner(sop); |
1da177e4 LT |
2969 | } |
2970 | out: | |
2971 | nfs4_unlock_state(); | |
2972 | return status; | |
2973 | } | |
2974 | ||
2975 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 2976 | alloc_reclaim(void) |
1da177e4 | 2977 | { |
a55370a3 | 2978 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
2979 | } |
2980 | ||
c7b9a459 N |
2981 | int |
2982 | nfs4_has_reclaimed_state(const char *name) | |
2983 | { | |
2984 | unsigned int strhashval = clientstr_hashval(name); | |
2985 | struct nfs4_client *clp; | |
2986 | ||
2987 | clp = find_confirmed_client_by_str(name, strhashval); | |
2988 | return clp ? 1 : 0; | |
2989 | } | |
2990 | ||
1da177e4 LT |
2991 | /* |
2992 | * failure => all reset bets are off, nfserr_no_grace... | |
2993 | */ | |
190e4fbf N |
2994 | int |
2995 | nfs4_client_to_reclaim(const char *name) | |
1da177e4 LT |
2996 | { |
2997 | unsigned int strhashval; | |
2998 | struct nfs4_client_reclaim *crp = NULL; | |
2999 | ||
a55370a3 N |
3000 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
3001 | crp = alloc_reclaim(); | |
1da177e4 LT |
3002 | if (!crp) |
3003 | return 0; | |
a55370a3 | 3004 | strhashval = clientstr_hashval(name); |
1da177e4 LT |
3005 | INIT_LIST_HEAD(&crp->cr_strhash); |
3006 | list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); | |
a55370a3 | 3007 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
1da177e4 LT |
3008 | reclaim_str_hashtbl_size++; |
3009 | return 1; | |
3010 | } | |
3011 | ||
3012 | static void | |
3013 | nfs4_release_reclaim(void) | |
3014 | { | |
3015 | struct nfs4_client_reclaim *crp = NULL; | |
3016 | int i; | |
3017 | ||
1da177e4 LT |
3018 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
3019 | while (!list_empty(&reclaim_str_hashtbl[i])) { | |
3020 | crp = list_entry(reclaim_str_hashtbl[i].next, | |
3021 | struct nfs4_client_reclaim, cr_strhash); | |
3022 | list_del(&crp->cr_strhash); | |
1da177e4 LT |
3023 | kfree(crp); |
3024 | reclaim_str_hashtbl_size--; | |
3025 | } | |
3026 | } | |
3027 | BUG_ON(reclaim_str_hashtbl_size); | |
3028 | } | |
3029 | ||
3030 | /* | |
3031 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
fd39ca9a | 3032 | static struct nfs4_client_reclaim * |
1da177e4 LT |
3033 | nfs4_find_reclaim_client(clientid_t *clid) |
3034 | { | |
3035 | unsigned int strhashval; | |
3036 | struct nfs4_client *clp; | |
3037 | struct nfs4_client_reclaim *crp = NULL; | |
3038 | ||
3039 | ||
3040 | /* find clientid in conf_id_hashtbl */ | |
3041 | clp = find_confirmed_client(clid); | |
3042 | if (clp == NULL) | |
3043 | return NULL; | |
3044 | ||
a55370a3 N |
3045 | dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", |
3046 | clp->cl_name.len, clp->cl_name.data, | |
3047 | clp->cl_recdir); | |
1da177e4 LT |
3048 | |
3049 | /* find clp->cl_name in reclaim_str_hashtbl */ | |
a55370a3 | 3050 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 | 3051 | list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { |
a55370a3 | 3052 | if (same_name(crp->cr_recdir, clp->cl_recdir)) { |
1da177e4 LT |
3053 | return crp; |
3054 | } | |
3055 | } | |
3056 | return NULL; | |
3057 | } | |
3058 | ||
3059 | /* | |
3060 | * Called from OPEN. Look for clientid in reclaim list. | |
3061 | */ | |
b37ad28b | 3062 | __be32 |
1da177e4 LT |
3063 | nfs4_check_open_reclaim(clientid_t *clid) |
3064 | { | |
dfc83565 | 3065 | return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; |
1da177e4 LT |
3066 | } |
3067 | ||
ac4d8ff2 | 3068 | /* initialization to perform at module load time: */ |
1da177e4 | 3069 | |
e8ff2a84 | 3070 | int |
ac4d8ff2 | 3071 | nfs4_state_init(void) |
1da177e4 | 3072 | { |
e8ff2a84 | 3073 | int i, status; |
1da177e4 | 3074 | |
e8ff2a84 BF |
3075 | status = nfsd4_init_slabs(); |
3076 | if (status) | |
3077 | return status; | |
1da177e4 LT |
3078 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
3079 | INIT_LIST_HEAD(&conf_id_hashtbl[i]); | |
3080 | INIT_LIST_HEAD(&conf_str_hashtbl[i]); | |
3081 | INIT_LIST_HEAD(&unconf_str_hashtbl[i]); | |
3082 | INIT_LIST_HEAD(&unconf_id_hashtbl[i]); | |
3083 | } | |
3084 | for (i = 0; i < FILE_HASH_SIZE; i++) { | |
3085 | INIT_LIST_HEAD(&file_hashtbl[i]); | |
3086 | } | |
3087 | for (i = 0; i < OWNER_HASH_SIZE; i++) { | |
3088 | INIT_LIST_HEAD(&ownerstr_hashtbl[i]); | |
3089 | INIT_LIST_HEAD(&ownerid_hashtbl[i]); | |
3090 | } | |
3091 | for (i = 0; i < STATEID_HASH_SIZE; i++) { | |
3092 | INIT_LIST_HEAD(&stateid_hashtbl[i]); | |
3093 | INIT_LIST_HEAD(&lockstateid_hashtbl[i]); | |
3094 | } | |
3095 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
3096 | INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); | |
3097 | INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); | |
3098 | } | |
1da177e4 | 3099 | memset(&onestateid, ~0, sizeof(stateid_t)); |
1da177e4 LT |
3100 | INIT_LIST_HEAD(&close_lru); |
3101 | INIT_LIST_HEAD(&client_lru); | |
3102 | INIT_LIST_HEAD(&del_recall_lru); | |
ac4d8ff2 N |
3103 | for (i = 0; i < CLIENT_HASH_SIZE; i++) |
3104 | INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); | |
3105 | reclaim_str_hashtbl_size = 0; | |
e8ff2a84 | 3106 | return 0; |
ac4d8ff2 N |
3107 | } |
3108 | ||
190e4fbf N |
3109 | static void |
3110 | nfsd4_load_reboot_recovery_data(void) | |
3111 | { | |
3112 | int status; | |
3113 | ||
0964a3d3 N |
3114 | nfs4_lock_state(); |
3115 | nfsd4_init_recdir(user_recovery_dirname); | |
190e4fbf | 3116 | status = nfsd4_recdir_load(); |
0964a3d3 | 3117 | nfs4_unlock_state(); |
190e4fbf N |
3118 | if (status) |
3119 | printk("NFSD: Failure reading reboot recovery data\n"); | |
3120 | } | |
3121 | ||
9a8db97e ME |
3122 | unsigned long |
3123 | get_nfs4_grace_period(void) | |
3124 | { | |
3125 | return max(user_lease_time, lease_time) * HZ; | |
3126 | } | |
3127 | ||
c2f1a551 MS |
3128 | /* |
3129 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
3130 | * client may quite reasonably hang on to a delegation as long as it has | |
3131 | * the inode cached. This becomes an obvious problem the first time a | |
3132 | * client's inode cache approaches the size of the server's total memory. | |
3133 | * | |
3134 | * For now we avoid this problem by imposing a hard limit on the number | |
3135 | * of delegations, which varies according to the server's memory size. | |
3136 | */ | |
3137 | static void | |
3138 | set_max_delegations(void) | |
3139 | { | |
3140 | /* | |
3141 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
3142 | * estimates suggest that in the worst case (where every delegation | |
3143 | * is for a different inode), a delegation could take about 1.5K, | |
3144 | * giving a worst case usage of about 6% of memory. | |
3145 | */ | |
3146 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
3147 | } | |
3148 | ||
ac4d8ff2 N |
3149 | /* initialization to perform when the nfsd service is started: */ |
3150 | ||
3151 | static void | |
3152 | __nfs4_state_start(void) | |
3153 | { | |
9a8db97e | 3154 | unsigned long grace_time; |
ac4d8ff2 | 3155 | |
1da177e4 | 3156 | boot_time = get_seconds(); |
9a8db97e | 3157 | grace_time = get_nfs_grace_period(); |
d99a05ad | 3158 | lease_time = user_lease_time; |
a76b4319 | 3159 | in_grace = 1; |
9a8db97e ME |
3160 | printk(KERN_INFO "NFSD: starting %ld-second grace period\n", |
3161 | grace_time/HZ); | |
58da282b | 3162 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
9a8db97e | 3163 | queue_delayed_work(laundry_wq, &laundromat_work, grace_time); |
c2f1a551 | 3164 | set_max_delegations(); |
1da177e4 LT |
3165 | } |
3166 | ||
e8ff2a84 | 3167 | void |
76a3550e | 3168 | nfs4_state_start(void) |
1da177e4 | 3169 | { |
1da177e4 | 3170 | if (nfs4_init) |
e8ff2a84 | 3171 | return; |
190e4fbf | 3172 | nfsd4_load_reboot_recovery_data(); |
76a3550e | 3173 | __nfs4_state_start(); |
1da177e4 | 3174 | nfs4_init = 1; |
e8ff2a84 | 3175 | return; |
1da177e4 LT |
3176 | } |
3177 | ||
3178 | int | |
3179 | nfs4_in_grace(void) | |
3180 | { | |
a76b4319 | 3181 | return in_grace; |
1da177e4 LT |
3182 | } |
3183 | ||
3184 | time_t | |
3185 | nfs4_lease_time(void) | |
3186 | { | |
3187 | return lease_time; | |
3188 | } | |
3189 | ||
3190 | static void | |
3191 | __nfs4_state_shutdown(void) | |
3192 | { | |
3193 | int i; | |
3194 | struct nfs4_client *clp = NULL; | |
3195 | struct nfs4_delegation *dp = NULL; | |
1da177e4 LT |
3196 | struct list_head *pos, *next, reaplist; |
3197 | ||
1da177e4 LT |
3198 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
3199 | while (!list_empty(&conf_id_hashtbl[i])) { | |
3200 | clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
3201 | expire_client(clp); | |
3202 | } | |
3203 | while (!list_empty(&unconf_str_hashtbl[i])) { | |
3204 | clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); | |
3205 | expire_client(clp); | |
3206 | } | |
3207 | } | |
3208 | INIT_LIST_HEAD(&reaplist); | |
3209 | spin_lock(&recall_lock); | |
3210 | list_for_each_safe(pos, next, &del_recall_lru) { | |
3211 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3212 | list_move(&dp->dl_recall_lru, &reaplist); | |
3213 | } | |
3214 | spin_unlock(&recall_lock); | |
3215 | list_for_each_safe(pos, next, &reaplist) { | |
3216 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3217 | list_del_init(&dp->dl_recall_lru); | |
3218 | unhash_delegation(dp); | |
3219 | } | |
3220 | ||
190e4fbf | 3221 | nfsd4_shutdown_recdir(); |
1da177e4 | 3222 | nfs4_init = 0; |
1da177e4 LT |
3223 | } |
3224 | ||
3225 | void | |
3226 | nfs4_state_shutdown(void) | |
3227 | { | |
5e8d5c29 N |
3228 | cancel_rearming_delayed_workqueue(laundry_wq, &laundromat_work); |
3229 | destroy_workqueue(laundry_wq); | |
1da177e4 LT |
3230 | nfs4_lock_state(); |
3231 | nfs4_release_reclaim(); | |
3232 | __nfs4_state_shutdown(); | |
1da177e4 LT |
3233 | nfs4_unlock_state(); |
3234 | } | |
3235 | ||
0964a3d3 N |
3236 | static void |
3237 | nfs4_set_recdir(char *recdir) | |
3238 | { | |
3239 | nfs4_lock_state(); | |
3240 | strcpy(user_recovery_dirname, recdir); | |
3241 | nfs4_unlock_state(); | |
3242 | } | |
3243 | ||
3244 | /* | |
3245 | * Change the NFSv4 recovery directory to recdir. | |
3246 | */ | |
3247 | int | |
3248 | nfs4_reset_recoverydir(char *recdir) | |
3249 | { | |
3250 | int status; | |
3251 | struct nameidata nd; | |
3252 | ||
3253 | status = path_lookup(recdir, LOOKUP_FOLLOW, &nd); | |
3254 | if (status) | |
3255 | return status; | |
3256 | status = -ENOTDIR; | |
3257 | if (S_ISDIR(nd.dentry->d_inode->i_mode)) { | |
3258 | nfs4_set_recdir(recdir); | |
3259 | status = 0; | |
3260 | } | |
3261 | path_release(&nd); | |
3262 | return status; | |
3263 | } | |
3264 | ||
1da177e4 LT |
3265 | /* |
3266 | * Called when leasetime is changed. | |
3267 | * | |
d99a05ad N |
3268 | * The only way the protocol gives us to handle on-the-fly lease changes is to |
3269 | * simulate a reboot. Instead of doing that, we just wait till the next time | |
3270 | * we start to register any changes in lease time. If the administrator | |
3271 | * really wants to change the lease time *now*, they can go ahead and bring | |
3272 | * nfsd down and then back up again after changing the lease time. | |
1da177e4 LT |
3273 | */ |
3274 | void | |
3275 | nfs4_reset_lease(time_t leasetime) | |
3276 | { | |
d99a05ad N |
3277 | lock_kernel(); |
3278 | user_lease_time = leasetime; | |
3279 | unlock_kernel(); | |
1da177e4 | 3280 | } |