Commit | Line | Data |
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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> | |
aceaf78d | 44 | #include <linux/file.h> |
1da177e4 LT |
45 | #include <linux/mount.h> |
46 | #include <linux/workqueue.h> | |
47 | #include <linux/smp_lock.h> | |
48 | #include <linux/kthread.h> | |
49 | #include <linux/nfs4.h> | |
50 | #include <linux/nfsd/state.h> | |
51 | #include <linux/nfsd/xdr4.h> | |
0964a3d3 | 52 | #include <linux/namei.h> |
c2f1a551 | 53 | #include <linux/swap.h> |
353ab6e9 | 54 | #include <linux/mutex.h> |
fd85b817 | 55 | #include <linux/lockd/bind.h> |
9a8db97e | 56 | #include <linux/module.h> |
1da177e4 LT |
57 | |
58 | #define NFSDDBG_FACILITY NFSDDBG_PROC | |
59 | ||
60 | /* Globals */ | |
61 | static time_t lease_time = 90; /* default lease time */ | |
d99a05ad | 62 | static time_t user_lease_time = 90; |
fd39ca9a | 63 | static time_t boot_time; |
a76b4319 | 64 | static int in_grace = 1; |
1da177e4 LT |
65 | static u32 current_ownerid = 1; |
66 | static u32 current_fileid = 1; | |
67 | static u32 current_delegid = 1; | |
68 | static u32 nfs4_init; | |
fd39ca9a N |
69 | static stateid_t zerostateid; /* bits all 0 */ |
70 | static stateid_t onestateid; /* bits all 1 */ | |
71 | ||
72 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t))) | |
73 | #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t))) | |
1da177e4 | 74 | |
1da177e4 | 75 | /* forward declarations */ |
fd39ca9a | 76 | static struct nfs4_stateid * find_stateid(stateid_t *stid, int flags); |
1da177e4 LT |
77 | static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid); |
78 | static void release_stateid_lockowners(struct nfs4_stateid *open_stp); | |
0964a3d3 N |
79 | static char user_recovery_dirname[PATH_MAX] = "/var/lib/nfs/v4recovery"; |
80 | static void nfs4_set_recdir(char *recdir); | |
1da177e4 LT |
81 | |
82 | /* Locking: | |
83 | * | |
353ab6e9 | 84 | * client_mutex: |
1da177e4 LT |
85 | * protects clientid_hashtbl[], clientstr_hashtbl[], |
86 | * unconfstr_hashtbl[], uncofid_hashtbl[]. | |
87 | */ | |
353ab6e9 | 88 | static DEFINE_MUTEX(client_mutex); |
1da177e4 | 89 | |
e18b890b CL |
90 | static struct kmem_cache *stateowner_slab = NULL; |
91 | static struct kmem_cache *file_slab = NULL; | |
92 | static struct kmem_cache *stateid_slab = NULL; | |
93 | static struct kmem_cache *deleg_slab = NULL; | |
e60d4398 | 94 | |
1da177e4 LT |
95 | void |
96 | nfs4_lock_state(void) | |
97 | { | |
353ab6e9 | 98 | mutex_lock(&client_mutex); |
1da177e4 LT |
99 | } |
100 | ||
101 | void | |
102 | nfs4_unlock_state(void) | |
103 | { | |
353ab6e9 | 104 | mutex_unlock(&client_mutex); |
1da177e4 LT |
105 | } |
106 | ||
107 | static inline u32 | |
108 | opaque_hashval(const void *ptr, int nbytes) | |
109 | { | |
110 | unsigned char *cptr = (unsigned char *) ptr; | |
111 | ||
112 | u32 x = 0; | |
113 | while (nbytes--) { | |
114 | x *= 37; | |
115 | x += *cptr++; | |
116 | } | |
117 | return x; | |
118 | } | |
119 | ||
120 | /* forward declarations */ | |
121 | static void release_stateowner(struct nfs4_stateowner *sop); | |
122 | static void release_stateid(struct nfs4_stateid *stp, int flags); | |
1da177e4 LT |
123 | |
124 | /* | |
125 | * Delegation state | |
126 | */ | |
127 | ||
128 | /* recall_lock protects the del_recall_lru */ | |
34af946a | 129 | static DEFINE_SPINLOCK(recall_lock); |
1da177e4 LT |
130 | static struct list_head del_recall_lru; |
131 | ||
13cd2184 N |
132 | static void |
133 | free_nfs4_file(struct kref *kref) | |
134 | { | |
135 | struct nfs4_file *fp = container_of(kref, struct nfs4_file, fi_ref); | |
136 | list_del(&fp->fi_hash); | |
137 | iput(fp->fi_inode); | |
138 | kmem_cache_free(file_slab, fp); | |
139 | } | |
140 | ||
141 | static inline void | |
142 | put_nfs4_file(struct nfs4_file *fi) | |
143 | { | |
144 | kref_put(&fi->fi_ref, free_nfs4_file); | |
145 | } | |
146 | ||
147 | static inline void | |
148 | get_nfs4_file(struct nfs4_file *fi) | |
149 | { | |
150 | kref_get(&fi->fi_ref); | |
151 | } | |
152 | ||
ef0f3390 | 153 | static int num_delegations; |
c2f1a551 | 154 | unsigned int max_delegations; |
ef0f3390 N |
155 | |
156 | /* | |
157 | * Open owner state (share locks) | |
158 | */ | |
159 | ||
160 | /* hash tables for nfs4_stateowner */ | |
161 | #define OWNER_HASH_BITS 8 | |
162 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
163 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
164 | ||
165 | #define ownerid_hashval(id) \ | |
166 | ((id) & OWNER_HASH_MASK) | |
167 | #define ownerstr_hashval(clientid, ownername) \ | |
168 | (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK) | |
169 | ||
170 | static struct list_head ownerid_hashtbl[OWNER_HASH_SIZE]; | |
171 | static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; | |
172 | ||
173 | /* hash table for nfs4_file */ | |
174 | #define FILE_HASH_BITS 8 | |
175 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
176 | #define FILE_HASH_MASK (FILE_HASH_SIZE - 1) | |
177 | /* hash table for (open)nfs4_stateid */ | |
178 | #define STATEID_HASH_BITS 10 | |
179 | #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS) | |
180 | #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1) | |
181 | ||
182 | #define file_hashval(x) \ | |
183 | hash_ptr(x, FILE_HASH_BITS) | |
184 | #define stateid_hashval(owner_id, file_id) \ | |
185 | (((owner_id) + (file_id)) & STATEID_HASH_MASK) | |
186 | ||
187 | static struct list_head file_hashtbl[FILE_HASH_SIZE]; | |
188 | static struct list_head stateid_hashtbl[STATEID_HASH_SIZE]; | |
189 | ||
1da177e4 LT |
190 | static struct nfs4_delegation * |
191 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type) | |
192 | { | |
193 | struct nfs4_delegation *dp; | |
194 | struct nfs4_file *fp = stp->st_file; | |
195 | struct nfs4_callback *cb = &stp->st_stateowner->so_client->cl_callback; | |
196 | ||
197 | dprintk("NFSD alloc_init_deleg\n"); | |
47f9940c MS |
198 | if (fp->fi_had_conflict) |
199 | return NULL; | |
c2f1a551 | 200 | if (num_delegations > max_delegations) |
ef0f3390 | 201 | return NULL; |
5b2d21c1 N |
202 | dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); |
203 | if (dp == NULL) | |
1da177e4 | 204 | return dp; |
ef0f3390 | 205 | num_delegations++; |
ea1da636 N |
206 | INIT_LIST_HEAD(&dp->dl_perfile); |
207 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 LT |
208 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
209 | dp->dl_client = clp; | |
13cd2184 | 210 | get_nfs4_file(fp); |
1da177e4 LT |
211 | dp->dl_file = fp; |
212 | dp->dl_flock = NULL; | |
213 | get_file(stp->st_vfs_file); | |
214 | dp->dl_vfs_file = stp->st_vfs_file; | |
215 | dp->dl_type = type; | |
216 | dp->dl_recall.cbr_dp = NULL; | |
217 | dp->dl_recall.cbr_ident = cb->cb_ident; | |
218 | dp->dl_recall.cbr_trunc = 0; | |
219 | dp->dl_stateid.si_boot = boot_time; | |
220 | dp->dl_stateid.si_stateownerid = current_delegid++; | |
221 | dp->dl_stateid.si_fileid = 0; | |
222 | dp->dl_stateid.si_generation = 0; | |
223 | dp->dl_fhlen = current_fh->fh_handle.fh_size; | |
224 | memcpy(dp->dl_fhval, ¤t_fh->fh_handle.fh_base, | |
225 | current_fh->fh_handle.fh_size); | |
226 | dp->dl_time = 0; | |
227 | atomic_set(&dp->dl_count, 1); | |
ea1da636 N |
228 | list_add(&dp->dl_perfile, &fp->fi_delegations); |
229 | list_add(&dp->dl_perclnt, &clp->cl_delegations); | |
1da177e4 LT |
230 | return dp; |
231 | } | |
232 | ||
233 | void | |
234 | nfs4_put_delegation(struct nfs4_delegation *dp) | |
235 | { | |
236 | if (atomic_dec_and_test(&dp->dl_count)) { | |
237 | dprintk("NFSD: freeing dp %p\n",dp); | |
13cd2184 | 238 | put_nfs4_file(dp->dl_file); |
5b2d21c1 | 239 | kmem_cache_free(deleg_slab, dp); |
ef0f3390 | 240 | num_delegations--; |
1da177e4 LT |
241 | } |
242 | } | |
243 | ||
244 | /* Remove the associated file_lock first, then remove the delegation. | |
245 | * lease_modify() is called to remove the FS_LEASE file_lock from | |
246 | * the i_flock list, eventually calling nfsd's lock_manager | |
247 | * fl_release_callback. | |
248 | */ | |
249 | static void | |
250 | nfs4_close_delegation(struct nfs4_delegation *dp) | |
251 | { | |
252 | struct file *filp = dp->dl_vfs_file; | |
253 | ||
254 | dprintk("NFSD: close_delegation dp %p\n",dp); | |
255 | dp->dl_vfs_file = NULL; | |
256 | /* The following nfsd_close may not actually close the file, | |
257 | * but we want to remove the lease in any case. */ | |
c907132d | 258 | if (dp->dl_flock) |
a9933cea | 259 | vfs_setlease(filp, F_UNLCK, &dp->dl_flock); |
1da177e4 | 260 | nfsd_close(filp); |
1da177e4 LT |
261 | } |
262 | ||
263 | /* Called under the state lock. */ | |
264 | static void | |
265 | unhash_delegation(struct nfs4_delegation *dp) | |
266 | { | |
ea1da636 N |
267 | list_del_init(&dp->dl_perfile); |
268 | list_del_init(&dp->dl_perclnt); | |
1da177e4 LT |
269 | spin_lock(&recall_lock); |
270 | list_del_init(&dp->dl_recall_lru); | |
271 | spin_unlock(&recall_lock); | |
272 | nfs4_close_delegation(dp); | |
273 | nfs4_put_delegation(dp); | |
274 | } | |
275 | ||
276 | /* | |
277 | * SETCLIENTID state | |
278 | */ | |
279 | ||
280 | /* Hash tables for nfs4_clientid state */ | |
281 | #define CLIENT_HASH_BITS 4 | |
282 | #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) | |
283 | #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) | |
284 | ||
285 | #define clientid_hashval(id) \ | |
286 | ((id) & CLIENT_HASH_MASK) | |
a55370a3 N |
287 | #define clientstr_hashval(name) \ |
288 | (opaque_hashval((name), 8) & CLIENT_HASH_MASK) | |
1da177e4 LT |
289 | /* |
290 | * reclaim_str_hashtbl[] holds known client info from previous reset/reboot | |
291 | * used in reboot/reset lease grace period processing | |
292 | * | |
293 | * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed | |
294 | * setclientid_confirmed info. | |
295 | * | |
296 | * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed | |
297 | * setclientid info. | |
298 | * | |
299 | * client_lru holds client queue ordered by nfs4_client.cl_time | |
300 | * for lease renewal. | |
301 | * | |
302 | * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time | |
303 | * for last close replay. | |
304 | */ | |
305 | static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; | |
306 | static int reclaim_str_hashtbl_size = 0; | |
307 | static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; | |
308 | static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; | |
309 | static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; | |
310 | static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; | |
311 | static struct list_head client_lru; | |
312 | static struct list_head close_lru; | |
313 | ||
314 | static inline void | |
315 | renew_client(struct nfs4_client *clp) | |
316 | { | |
317 | /* | |
318 | * Move client to the end to the LRU list. | |
319 | */ | |
320 | dprintk("renewing client (clientid %08x/%08x)\n", | |
321 | clp->cl_clientid.cl_boot, | |
322 | clp->cl_clientid.cl_id); | |
323 | list_move_tail(&clp->cl_lru, &client_lru); | |
324 | clp->cl_time = get_seconds(); | |
325 | } | |
326 | ||
327 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ | |
328 | static int | |
329 | STALE_CLIENTID(clientid_t *clid) | |
330 | { | |
331 | if (clid->cl_boot == boot_time) | |
332 | return 0; | |
333 | dprintk("NFSD stale clientid (%08x/%08x)\n", | |
334 | clid->cl_boot, clid->cl_id); | |
335 | return 1; | |
336 | } | |
337 | ||
338 | /* | |
339 | * XXX Should we use a slab cache ? | |
340 | * This type of memory management is somewhat inefficient, but we use it | |
341 | * anyway since SETCLIENTID is not a common operation. | |
342 | */ | |
35bba9a3 | 343 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
344 | { |
345 | struct nfs4_client *clp; | |
346 | ||
35bba9a3 BF |
347 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
348 | if (clp == NULL) | |
349 | return NULL; | |
350 | clp->cl_name.data = kmalloc(name.len, GFP_KERNEL); | |
351 | if (clp->cl_name.data == NULL) { | |
352 | kfree(clp); | |
353 | return NULL; | |
1da177e4 | 354 | } |
35bba9a3 BF |
355 | memcpy(clp->cl_name.data, name.data, name.len); |
356 | clp->cl_name.len = name.len; | |
1da177e4 LT |
357 | return clp; |
358 | } | |
359 | ||
1b1a9b31 BF |
360 | static void |
361 | shutdown_callback_client(struct nfs4_client *clp) | |
362 | { | |
363 | struct rpc_clnt *clnt = clp->cl_callback.cb_client; | |
364 | ||
1b1a9b31 | 365 | if (clnt) { |
404ec117 BF |
366 | /* |
367 | * Callback threads take a reference on the client, so there | |
368 | * should be no outstanding callbacks at this point. | |
369 | */ | |
1b1a9b31 BF |
370 | clp->cl_callback.cb_client = NULL; |
371 | rpc_shutdown_client(clnt); | |
372 | } | |
373 | } | |
374 | ||
1da177e4 LT |
375 | static inline void |
376 | free_client(struct nfs4_client *clp) | |
377 | { | |
1b1a9b31 | 378 | shutdown_callback_client(clp); |
1da177e4 LT |
379 | if (clp->cl_cred.cr_group_info) |
380 | put_group_info(clp->cl_cred.cr_group_info); | |
381 | kfree(clp->cl_name.data); | |
382 | kfree(clp); | |
383 | } | |
384 | ||
385 | void | |
386 | put_nfs4_client(struct nfs4_client *clp) | |
387 | { | |
388 | if (atomic_dec_and_test(&clp->cl_count)) | |
389 | free_client(clp); | |
390 | } | |
391 | ||
392 | static void | |
393 | expire_client(struct nfs4_client *clp) | |
394 | { | |
395 | struct nfs4_stateowner *sop; | |
396 | struct nfs4_delegation *dp; | |
1da177e4 LT |
397 | struct list_head reaplist; |
398 | ||
399 | dprintk("NFSD: expire_client cl_count %d\n", | |
400 | atomic_read(&clp->cl_count)); | |
401 | ||
1da177e4 LT |
402 | INIT_LIST_HEAD(&reaplist); |
403 | spin_lock(&recall_lock); | |
ea1da636 N |
404 | while (!list_empty(&clp->cl_delegations)) { |
405 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
1da177e4 LT |
406 | dprintk("NFSD: expire client. dp %p, fp %p\n", dp, |
407 | dp->dl_flock); | |
ea1da636 | 408 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
409 | list_move(&dp->dl_recall_lru, &reaplist); |
410 | } | |
411 | spin_unlock(&recall_lock); | |
412 | while (!list_empty(&reaplist)) { | |
413 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
414 | list_del_init(&dp->dl_recall_lru); | |
415 | unhash_delegation(dp); | |
416 | } | |
417 | list_del(&clp->cl_idhash); | |
418 | list_del(&clp->cl_strhash); | |
419 | list_del(&clp->cl_lru); | |
ea1da636 N |
420 | while (!list_empty(&clp->cl_openowners)) { |
421 | sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient); | |
1da177e4 LT |
422 | release_stateowner(sop); |
423 | } | |
424 | put_nfs4_client(clp); | |
425 | } | |
426 | ||
35bba9a3 BF |
427 | static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir) |
428 | { | |
1da177e4 LT |
429 | struct nfs4_client *clp; |
430 | ||
35bba9a3 BF |
431 | clp = alloc_client(name); |
432 | if (clp == NULL) | |
433 | return NULL; | |
a55370a3 | 434 | memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); |
1da177e4 LT |
435 | atomic_set(&clp->cl_count, 1); |
436 | atomic_set(&clp->cl_callback.cb_set, 0); | |
1da177e4 LT |
437 | INIT_LIST_HEAD(&clp->cl_idhash); |
438 | INIT_LIST_HEAD(&clp->cl_strhash); | |
ea1da636 N |
439 | INIT_LIST_HEAD(&clp->cl_openowners); |
440 | INIT_LIST_HEAD(&clp->cl_delegations); | |
1da177e4 | 441 | INIT_LIST_HEAD(&clp->cl_lru); |
1da177e4 LT |
442 | return clp; |
443 | } | |
444 | ||
35bba9a3 BF |
445 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
446 | { | |
447 | memcpy(target->cl_verifier.data, source->data, | |
448 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
449 | } |
450 | ||
35bba9a3 BF |
451 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
452 | { | |
1da177e4 LT |
453 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
454 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
455 | } | |
456 | ||
35bba9a3 BF |
457 | static void copy_cred(struct svc_cred *target, struct svc_cred *source) |
458 | { | |
1da177e4 LT |
459 | target->cr_uid = source->cr_uid; |
460 | target->cr_gid = source->cr_gid; | |
461 | target->cr_group_info = source->cr_group_info; | |
462 | get_group_info(target->cr_group_info); | |
463 | } | |
464 | ||
35bba9a3 | 465 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 466 | { |
a55370a3 | 467 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
468 | } |
469 | ||
470 | static int | |
599e0a22 BF |
471 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
472 | { | |
473 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
474 | } |
475 | ||
476 | static int | |
599e0a22 BF |
477 | same_clid(clientid_t *cl1, clientid_t *cl2) |
478 | { | |
479 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
480 | } |
481 | ||
482 | /* XXX what about NGROUP */ | |
483 | static int | |
599e0a22 BF |
484 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
485 | { | |
486 | return cr1->cr_uid == cr2->cr_uid; | |
1da177e4 LT |
487 | } |
488 | ||
5ec7b46c BF |
489 | static void gen_clid(struct nfs4_client *clp) |
490 | { | |
491 | static u32 current_clientid = 1; | |
492 | ||
1da177e4 LT |
493 | clp->cl_clientid.cl_boot = boot_time; |
494 | clp->cl_clientid.cl_id = current_clientid++; | |
495 | } | |
496 | ||
deda2faa BF |
497 | static void gen_confirm(struct nfs4_client *clp) |
498 | { | |
499 | static u32 i; | |
500 | u32 *p; | |
1da177e4 | 501 | |
1da177e4 | 502 | p = (u32 *)clp->cl_confirm.data; |
deda2faa BF |
503 | *p++ = get_seconds(); |
504 | *p++ = i++; | |
1da177e4 LT |
505 | } |
506 | ||
35bba9a3 BF |
507 | static int check_name(struct xdr_netobj name) |
508 | { | |
1da177e4 LT |
509 | if (name.len == 0) |
510 | return 0; | |
511 | if (name.len > NFS4_OPAQUE_LIMIT) { | |
2fdada03 | 512 | dprintk("NFSD: check_name: name too long(%d)!\n", name.len); |
1da177e4 LT |
513 | return 0; |
514 | } | |
515 | return 1; | |
516 | } | |
517 | ||
fd39ca9a | 518 | static void |
1da177e4 LT |
519 | add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) |
520 | { | |
521 | unsigned int idhashval; | |
522 | ||
523 | list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); | |
524 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
525 | list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); | |
526 | list_add_tail(&clp->cl_lru, &client_lru); | |
527 | clp->cl_time = get_seconds(); | |
528 | } | |
529 | ||
fd39ca9a | 530 | static void |
1da177e4 LT |
531 | move_to_confirmed(struct nfs4_client *clp) |
532 | { | |
533 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
534 | unsigned int strhashval; | |
535 | ||
536 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
537 | list_del_init(&clp->cl_strhash); | |
f116629d | 538 | list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); |
a55370a3 | 539 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 LT |
540 | list_add(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); |
541 | renew_client(clp); | |
542 | } | |
543 | ||
544 | static struct nfs4_client * | |
545 | find_confirmed_client(clientid_t *clid) | |
546 | { | |
547 | struct nfs4_client *clp; | |
548 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
549 | ||
550 | list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 551 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
552 | return clp; |
553 | } | |
554 | return NULL; | |
555 | } | |
556 | ||
557 | static struct nfs4_client * | |
558 | find_unconfirmed_client(clientid_t *clid) | |
559 | { | |
560 | struct nfs4_client *clp; | |
561 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
562 | ||
563 | list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 564 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
565 | return clp; |
566 | } | |
567 | return NULL; | |
568 | } | |
569 | ||
28ce6054 N |
570 | static struct nfs4_client * |
571 | find_confirmed_client_by_str(const char *dname, unsigned int hashval) | |
572 | { | |
573 | struct nfs4_client *clp; | |
574 | ||
575 | list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { | |
576 | if (same_name(clp->cl_recdir, dname)) | |
577 | return clp; | |
578 | } | |
579 | return NULL; | |
580 | } | |
581 | ||
582 | static struct nfs4_client * | |
583 | find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) | |
584 | { | |
585 | struct nfs4_client *clp; | |
586 | ||
587 | list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { | |
588 | if (same_name(clp->cl_recdir, dname)) | |
589 | return clp; | |
590 | } | |
591 | return NULL; | |
592 | } | |
593 | ||
1da177e4 LT |
594 | /* a helper function for parse_callback */ |
595 | static int | |
596 | parse_octet(unsigned int *lenp, char **addrp) | |
597 | { | |
598 | unsigned int len = *lenp; | |
599 | char *p = *addrp; | |
600 | int n = -1; | |
601 | char c; | |
602 | ||
603 | for (;;) { | |
604 | if (!len) | |
605 | break; | |
606 | len--; | |
607 | c = *p++; | |
608 | if (c == '.') | |
609 | break; | |
610 | if ((c < '0') || (c > '9')) { | |
611 | n = -1; | |
612 | break; | |
613 | } | |
614 | if (n < 0) | |
615 | n = 0; | |
616 | n = (n * 10) + (c - '0'); | |
617 | if (n > 255) { | |
618 | n = -1; | |
619 | break; | |
620 | } | |
621 | } | |
622 | *lenp = len; | |
623 | *addrp = p; | |
624 | return n; | |
625 | } | |
626 | ||
627 | /* parse and set the setclientid ipv4 callback address */ | |
fd39ca9a | 628 | static int |
1da177e4 LT |
629 | parse_ipv4(unsigned int addr_len, char *addr_val, unsigned int *cbaddrp, unsigned short *cbportp) |
630 | { | |
631 | int temp = 0; | |
632 | u32 cbaddr = 0; | |
633 | u16 cbport = 0; | |
634 | u32 addrlen = addr_len; | |
635 | char *addr = addr_val; | |
636 | int i, shift; | |
637 | ||
638 | /* ipaddress */ | |
639 | shift = 24; | |
640 | for(i = 4; i > 0 ; i--) { | |
641 | if ((temp = parse_octet(&addrlen, &addr)) < 0) { | |
642 | return 0; | |
643 | } | |
644 | cbaddr |= (temp << shift); | |
645 | if (shift > 0) | |
646 | shift -= 8; | |
647 | } | |
648 | *cbaddrp = cbaddr; | |
649 | ||
650 | /* port */ | |
651 | shift = 8; | |
652 | for(i = 2; i > 0 ; i--) { | |
653 | if ((temp = parse_octet(&addrlen, &addr)) < 0) { | |
654 | return 0; | |
655 | } | |
656 | cbport |= (temp << shift); | |
657 | if (shift > 0) | |
658 | shift -= 8; | |
659 | } | |
660 | *cbportp = cbport; | |
661 | return 1; | |
662 | } | |
663 | ||
fd39ca9a | 664 | static void |
1da177e4 LT |
665 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se) |
666 | { | |
667 | struct nfs4_callback *cb = &clp->cl_callback; | |
668 | ||
669 | /* Currently, we only support tcp for the callback channel */ | |
670 | if ((se->se_callback_netid_len != 3) || memcmp((char *)se->se_callback_netid_val, "tcp", 3)) | |
671 | goto out_err; | |
672 | ||
673 | if ( !(parse_ipv4(se->se_callback_addr_len, se->se_callback_addr_val, | |
674 | &cb->cb_addr, &cb->cb_port))) | |
675 | goto out_err; | |
676 | cb->cb_prog = se->se_callback_prog; | |
677 | cb->cb_ident = se->se_callback_ident; | |
1da177e4 LT |
678 | return; |
679 | out_err: | |
849823c5 | 680 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
681 | "will not receive delegations\n", |
682 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
683 | ||
1da177e4 LT |
684 | return; |
685 | } | |
686 | ||
b37ad28b | 687 | __be32 |
b591480b BF |
688 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
689 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 690 | { |
27459f09 | 691 | struct sockaddr_in *sin = svc_addr_in(rqstp); |
1da177e4 LT |
692 | struct xdr_netobj clname = { |
693 | .len = setclid->se_namelen, | |
694 | .data = setclid->se_name, | |
695 | }; | |
696 | nfs4_verifier clverifier = setclid->se_verf; | |
697 | unsigned int strhashval; | |
28ce6054 | 698 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 699 | __be32 status; |
a55370a3 | 700 | char dname[HEXDIR_LEN]; |
1da177e4 | 701 | |
1da177e4 | 702 | if (!check_name(clname)) |
73aea4ec | 703 | return nfserr_inval; |
1da177e4 | 704 | |
a55370a3 N |
705 | status = nfs4_make_rec_clidname(dname, &clname); |
706 | if (status) | |
73aea4ec | 707 | return status; |
a55370a3 | 708 | |
1da177e4 LT |
709 | /* |
710 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
711 | * We get here on a DRC miss. | |
712 | */ | |
713 | ||
a55370a3 | 714 | strhashval = clientstr_hashval(dname); |
1da177e4 | 715 | |
1da177e4 | 716 | nfs4_lock_state(); |
28ce6054 N |
717 | conf = find_confirmed_client_by_str(dname, strhashval); |
718 | if (conf) { | |
a186e767 | 719 | /* RFC 3530 14.2.33 CASE 0: */ |
1da177e4 | 720 | status = nfserr_clid_inuse; |
599e0a22 | 721 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred) |
27459f09 | 722 | || conf->cl_addr != sin->sin_addr.s_addr) { |
21315edd BF |
723 | dprintk("NFSD: setclientid: string in use by client" |
724 | "at %u.%u.%u.%u\n", NIPQUAD(conf->cl_addr)); | |
1da177e4 LT |
725 | goto out; |
726 | } | |
1da177e4 | 727 | } |
a186e767 BF |
728 | /* |
729 | * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") | |
730 | * has a description of SETCLIENTID request processing consisting | |
731 | * of 5 bullet points, labeled as CASE0 - CASE4 below. | |
732 | */ | |
28ce6054 | 733 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
1da177e4 LT |
734 | status = nfserr_resource; |
735 | if (!conf) { | |
a186e767 BF |
736 | /* |
737 | * RFC 3530 14.2.33 CASE 4: | |
738 | * placed first, because it is the normal case | |
1da177e4 LT |
739 | */ |
740 | if (unconf) | |
741 | expire_client(unconf); | |
a55370a3 N |
742 | new = create_client(clname, dname); |
743 | if (new == NULL) | |
1da177e4 | 744 | goto out; |
1da177e4 | 745 | gen_clid(new); |
599e0a22 | 746 | } else if (same_verf(&conf->cl_verifier, &clverifier)) { |
1da177e4 | 747 | /* |
a186e767 BF |
748 | * RFC 3530 14.2.33 CASE 1: |
749 | * probable callback update | |
1da177e4 | 750 | */ |
31f4a6c1 N |
751 | if (unconf) { |
752 | /* Note this is removing unconfirmed {*x***}, | |
753 | * which is stronger than RFC recommended {vxc**}. | |
754 | * This has the advantage that there is at most | |
755 | * one {*x***} in either list at any time. | |
756 | */ | |
757 | expire_client(unconf); | |
1da177e4 | 758 | } |
a55370a3 N |
759 | new = create_client(clname, dname); |
760 | if (new == NULL) | |
1da177e4 | 761 | goto out; |
1da177e4 | 762 | copy_clid(new, conf); |
1da177e4 LT |
763 | } else if (!unconf) { |
764 | /* | |
a186e767 BF |
765 | * RFC 3530 14.2.33 CASE 2: |
766 | * probable client reboot; state will be removed if | |
767 | * confirmed. | |
1da177e4 | 768 | */ |
a55370a3 N |
769 | new = create_client(clname, dname); |
770 | if (new == NULL) | |
1da177e4 | 771 | goto out; |
1da177e4 | 772 | gen_clid(new); |
49ba8781 | 773 | } else { |
a186e767 BF |
774 | /* |
775 | * RFC 3530 14.2.33 CASE 3: | |
776 | * probable client reboot; state will be removed if | |
777 | * confirmed. | |
1da177e4 LT |
778 | */ |
779 | expire_client(unconf); | |
a55370a3 N |
780 | new = create_client(clname, dname); |
781 | if (new == NULL) | |
1da177e4 | 782 | goto out; |
1da177e4 | 783 | gen_clid(new); |
1da177e4 | 784 | } |
c175b83c BF |
785 | copy_verf(new, &clverifier); |
786 | new->cl_addr = sin->sin_addr.s_addr; | |
787 | copy_cred(&new->cl_cred, &rqstp->rq_cred); | |
788 | gen_confirm(new); | |
789 | gen_callback(new, setclid); | |
790 | add_to_unconfirmed(new, strhashval); | |
1da177e4 LT |
791 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
792 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
793 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
794 | status = nfs_ok; | |
795 | out: | |
796 | nfs4_unlock_state(); | |
797 | return status; | |
798 | } | |
799 | ||
800 | ||
801 | /* | |
a186e767 BF |
802 | * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has |
803 | * a description of SETCLIENTID_CONFIRM request processing consisting of 4 | |
804 | * bullets, labeled as CASE1 - CASE4 below. | |
1da177e4 | 805 | */ |
b37ad28b | 806 | __be32 |
b591480b BF |
807 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
808 | struct nfsd4_compound_state *cstate, | |
809 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 810 | { |
27459f09 | 811 | struct sockaddr_in *sin = svc_addr_in(rqstp); |
21ab45a4 | 812 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
813 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
814 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 815 | __be32 status; |
1da177e4 LT |
816 | |
817 | if (STALE_CLIENTID(clid)) | |
818 | return nfserr_stale_clientid; | |
819 | /* | |
820 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
821 | * We get here on a DRC miss. | |
822 | */ | |
823 | ||
824 | nfs4_lock_state(); | |
21ab45a4 N |
825 | |
826 | conf = find_confirmed_client(clid); | |
827 | unconf = find_unconfirmed_client(clid); | |
828 | ||
829 | status = nfserr_clid_inuse; | |
27459f09 | 830 | if (conf && conf->cl_addr != sin->sin_addr.s_addr) |
21ab45a4 | 831 | goto out; |
27459f09 | 832 | if (unconf && unconf->cl_addr != sin->sin_addr.s_addr) |
21ab45a4 N |
833 | goto out; |
834 | ||
a186e767 BF |
835 | /* |
836 | * section 14.2.34 of RFC 3530 has a description of | |
837 | * SETCLIENTID_CONFIRM request processing consisting | |
838 | * of 4 bullet points, labeled as CASE1 - CASE4 below. | |
839 | */ | |
366e0c1d | 840 | if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { |
a186e767 BF |
841 | /* |
842 | * RFC 3530 14.2.34 CASE 1: | |
843 | * callback update | |
844 | */ | |
599e0a22 | 845 | if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) |
1da177e4 LT |
846 | status = nfserr_clid_inuse; |
847 | else { | |
1a69c179 N |
848 | /* XXX: We just turn off callbacks until we can handle |
849 | * change request correctly. */ | |
cb36d634 | 850 | atomic_set(&conf->cl_callback.cb_set, 0); |
21ab45a4 | 851 | gen_confirm(conf); |
46309029 | 852 | nfsd4_remove_clid_dir(unconf); |
1a69c179 | 853 | expire_client(unconf); |
1da177e4 | 854 | status = nfs_ok; |
1a69c179 | 855 | |
1da177e4 | 856 | } |
f3aba4e5 | 857 | } else if (conf && !unconf) { |
a186e767 BF |
858 | /* |
859 | * RFC 3530 14.2.34 CASE 2: | |
860 | * probable retransmitted request; play it safe and | |
861 | * do nothing. | |
7c79f737 | 862 | */ |
599e0a22 | 863 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) |
1da177e4 | 864 | status = nfserr_clid_inuse; |
21ab45a4 | 865 | else |
1da177e4 | 866 | status = nfs_ok; |
7c79f737 | 867 | } else if (!conf && unconf |
599e0a22 | 868 | && same_verf(&unconf->cl_confirm, &confirm)) { |
a186e767 BF |
869 | /* |
870 | * RFC 3530 14.2.34 CASE 3: | |
871 | * Normal case; new or rebooted client: | |
7c79f737 | 872 | */ |
599e0a22 | 873 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { |
1da177e4 LT |
874 | status = nfserr_clid_inuse; |
875 | } else { | |
1a69c179 N |
876 | unsigned int hash = |
877 | clientstr_hashval(unconf->cl_recdir); | |
878 | conf = find_confirmed_client_by_str(unconf->cl_recdir, | |
879 | hash); | |
880 | if (conf) { | |
c7b9a459 | 881 | nfsd4_remove_clid_dir(conf); |
1a69c179 N |
882 | expire_client(conf); |
883 | } | |
1da177e4 | 884 | move_to_confirmed(unconf); |
21ab45a4 | 885 | conf = unconf; |
46f8a64b | 886 | nfsd4_probe_callback(conf); |
1a69c179 | 887 | status = nfs_ok; |
1da177e4 | 888 | } |
599e0a22 BF |
889 | } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) |
890 | && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, | |
7c79f737 | 891 | &confirm)))) { |
a186e767 BF |
892 | /* |
893 | * RFC 3530 14.2.34 CASE 4: | |
894 | * Client probably hasn't noticed that we rebooted yet. | |
7c79f737 | 895 | */ |
1da177e4 | 896 | status = nfserr_stale_clientid; |
7c79f737 | 897 | } else { |
08e8987c N |
898 | /* check that we have hit one of the cases...*/ |
899 | status = nfserr_clid_inuse; | |
900 | } | |
1da177e4 | 901 | out: |
1da177e4 LT |
902 | nfs4_unlock_state(); |
903 | return status; | |
904 | } | |
905 | ||
1da177e4 LT |
906 | /* OPEN Share state helper functions */ |
907 | static inline struct nfs4_file * | |
908 | alloc_init_file(struct inode *ino) | |
909 | { | |
910 | struct nfs4_file *fp; | |
911 | unsigned int hashval = file_hashval(ino); | |
912 | ||
e60d4398 N |
913 | fp = kmem_cache_alloc(file_slab, GFP_KERNEL); |
914 | if (fp) { | |
13cd2184 | 915 | kref_init(&fp->fi_ref); |
1da177e4 | 916 | INIT_LIST_HEAD(&fp->fi_hash); |
8beefa24 N |
917 | INIT_LIST_HEAD(&fp->fi_stateids); |
918 | INIT_LIST_HEAD(&fp->fi_delegations); | |
1da177e4 LT |
919 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); |
920 | fp->fi_inode = igrab(ino); | |
921 | fp->fi_id = current_fileid++; | |
47f9940c | 922 | fp->fi_had_conflict = false; |
1da177e4 LT |
923 | return fp; |
924 | } | |
925 | return NULL; | |
926 | } | |
927 | ||
e60d4398 | 928 | static void |
e18b890b | 929 | nfsd4_free_slab(struct kmem_cache **slab) |
1da177e4 | 930 | { |
e60d4398 N |
931 | if (*slab == NULL) |
932 | return; | |
1a1d92c1 | 933 | kmem_cache_destroy(*slab); |
e60d4398 | 934 | *slab = NULL; |
1da177e4 LT |
935 | } |
936 | ||
e8ff2a84 | 937 | void |
1da177e4 LT |
938 | nfsd4_free_slabs(void) |
939 | { | |
e60d4398 N |
940 | nfsd4_free_slab(&stateowner_slab); |
941 | nfsd4_free_slab(&file_slab); | |
5ac049ac | 942 | nfsd4_free_slab(&stateid_slab); |
5b2d21c1 | 943 | nfsd4_free_slab(&deleg_slab); |
e60d4398 | 944 | } |
1da177e4 | 945 | |
e60d4398 N |
946 | static int |
947 | nfsd4_init_slabs(void) | |
948 | { | |
949 | stateowner_slab = kmem_cache_create("nfsd4_stateowners", | |
20c2df83 | 950 | sizeof(struct nfs4_stateowner), 0, 0, NULL); |
e60d4398 N |
951 | if (stateowner_slab == NULL) |
952 | goto out_nomem; | |
953 | file_slab = kmem_cache_create("nfsd4_files", | |
20c2df83 | 954 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 N |
955 | if (file_slab == NULL) |
956 | goto out_nomem; | |
5ac049ac | 957 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
20c2df83 | 958 | sizeof(struct nfs4_stateid), 0, 0, NULL); |
5ac049ac N |
959 | if (stateid_slab == NULL) |
960 | goto out_nomem; | |
5b2d21c1 | 961 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 962 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 N |
963 | if (deleg_slab == NULL) |
964 | goto out_nomem; | |
e60d4398 N |
965 | return 0; |
966 | out_nomem: | |
967 | nfsd4_free_slabs(); | |
968 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | |
969 | return -ENOMEM; | |
1da177e4 LT |
970 | } |
971 | ||
972 | void | |
973 | nfs4_free_stateowner(struct kref *kref) | |
974 | { | |
975 | struct nfs4_stateowner *sop = | |
976 | container_of(kref, struct nfs4_stateowner, so_ref); | |
977 | kfree(sop->so_owner.data); | |
978 | kmem_cache_free(stateowner_slab, sop); | |
979 | } | |
980 | ||
981 | static inline struct nfs4_stateowner * | |
982 | alloc_stateowner(struct xdr_netobj *owner) | |
983 | { | |
984 | struct nfs4_stateowner *sop; | |
985 | ||
986 | if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) { | |
987 | if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) { | |
988 | memcpy(sop->so_owner.data, owner->data, owner->len); | |
989 | sop->so_owner.len = owner->len; | |
990 | kref_init(&sop->so_ref); | |
991 | return sop; | |
992 | } | |
993 | kmem_cache_free(stateowner_slab, sop); | |
994 | } | |
995 | return NULL; | |
996 | } | |
997 | ||
998 | static struct nfs4_stateowner * | |
999 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { | |
1000 | struct nfs4_stateowner *sop; | |
1001 | struct nfs4_replay *rp; | |
1002 | unsigned int idhashval; | |
1003 | ||
1004 | if (!(sop = alloc_stateowner(&open->op_owner))) | |
1005 | return NULL; | |
1006 | idhashval = ownerid_hashval(current_ownerid); | |
1007 | INIT_LIST_HEAD(&sop->so_idhash); | |
1008 | INIT_LIST_HEAD(&sop->so_strhash); | |
1009 | INIT_LIST_HEAD(&sop->so_perclient); | |
ea1da636 N |
1010 | INIT_LIST_HEAD(&sop->so_stateids); |
1011 | INIT_LIST_HEAD(&sop->so_perstateid); /* not used */ | |
1da177e4 LT |
1012 | INIT_LIST_HEAD(&sop->so_close_lru); |
1013 | sop->so_time = 0; | |
1014 | list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]); | |
1015 | list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]); | |
ea1da636 | 1016 | list_add(&sop->so_perclient, &clp->cl_openowners); |
1da177e4 LT |
1017 | sop->so_is_open_owner = 1; |
1018 | sop->so_id = current_ownerid++; | |
1019 | sop->so_client = clp; | |
1020 | sop->so_seqid = open->op_seqid; | |
1021 | sop->so_confirmed = 0; | |
1022 | rp = &sop->so_replay; | |
de1ae286 | 1023 | rp->rp_status = nfserr_serverfault; |
1da177e4 LT |
1024 | rp->rp_buflen = 0; |
1025 | rp->rp_buf = rp->rp_ibuf; | |
1026 | return sop; | |
1027 | } | |
1028 | ||
1029 | static void | |
1030 | release_stateid_lockowners(struct nfs4_stateid *open_stp) | |
1031 | { | |
1032 | struct nfs4_stateowner *lock_sop; | |
1033 | ||
ea1da636 N |
1034 | while (!list_empty(&open_stp->st_lockowners)) { |
1035 | lock_sop = list_entry(open_stp->st_lockowners.next, | |
1036 | struct nfs4_stateowner, so_perstateid); | |
1037 | /* list_del(&open_stp->st_lockowners); */ | |
1da177e4 LT |
1038 | BUG_ON(lock_sop->so_is_open_owner); |
1039 | release_stateowner(lock_sop); | |
1040 | } | |
1041 | } | |
1042 | ||
1043 | static void | |
1044 | unhash_stateowner(struct nfs4_stateowner *sop) | |
1045 | { | |
1046 | struct nfs4_stateid *stp; | |
1047 | ||
1048 | list_del(&sop->so_idhash); | |
1049 | list_del(&sop->so_strhash); | |
6fa305de | 1050 | if (sop->so_is_open_owner) |
1da177e4 | 1051 | list_del(&sop->so_perclient); |
ea1da636 N |
1052 | list_del(&sop->so_perstateid); |
1053 | while (!list_empty(&sop->so_stateids)) { | |
1054 | stp = list_entry(sop->so_stateids.next, | |
1055 | struct nfs4_stateid, st_perstateowner); | |
1da177e4 LT |
1056 | if (sop->so_is_open_owner) |
1057 | release_stateid(stp, OPEN_STATE); | |
1058 | else | |
1059 | release_stateid(stp, LOCK_STATE); | |
1060 | } | |
1061 | } | |
1062 | ||
1063 | static void | |
1064 | release_stateowner(struct nfs4_stateowner *sop) | |
1065 | { | |
1066 | unhash_stateowner(sop); | |
1067 | list_del(&sop->so_close_lru); | |
1068 | nfs4_put_stateowner(sop); | |
1069 | } | |
1070 | ||
1071 | static inline void | |
1072 | init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { | |
1073 | struct nfs4_stateowner *sop = open->op_stateowner; | |
1074 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); | |
1075 | ||
1076 | INIT_LIST_HEAD(&stp->st_hash); | |
ea1da636 N |
1077 | INIT_LIST_HEAD(&stp->st_perstateowner); |
1078 | INIT_LIST_HEAD(&stp->st_lockowners); | |
1da177e4 LT |
1079 | INIT_LIST_HEAD(&stp->st_perfile); |
1080 | list_add(&stp->st_hash, &stateid_hashtbl[hashval]); | |
ea1da636 | 1081 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
8beefa24 | 1082 | list_add(&stp->st_perfile, &fp->fi_stateids); |
1da177e4 | 1083 | stp->st_stateowner = sop; |
13cd2184 | 1084 | get_nfs4_file(fp); |
1da177e4 LT |
1085 | stp->st_file = fp; |
1086 | stp->st_stateid.si_boot = boot_time; | |
1087 | stp->st_stateid.si_stateownerid = sop->so_id; | |
1088 | stp->st_stateid.si_fileid = fp->fi_id; | |
1089 | stp->st_stateid.si_generation = 0; | |
1090 | stp->st_access_bmap = 0; | |
1091 | stp->st_deny_bmap = 0; | |
1092 | __set_bit(open->op_share_access, &stp->st_access_bmap); | |
1093 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); | |
4c4cd222 | 1094 | stp->st_openstp = NULL; |
1da177e4 LT |
1095 | } |
1096 | ||
1097 | static void | |
1098 | release_stateid(struct nfs4_stateid *stp, int flags) | |
1099 | { | |
1100 | struct file *filp = stp->st_vfs_file; | |
1101 | ||
1102 | list_del(&stp->st_hash); | |
1da177e4 | 1103 | list_del(&stp->st_perfile); |
ea1da636 | 1104 | list_del(&stp->st_perstateowner); |
1da177e4 LT |
1105 | if (flags & OPEN_STATE) { |
1106 | release_stateid_lockowners(stp); | |
1107 | stp->st_vfs_file = NULL; | |
1108 | nfsd_close(filp); | |
1da177e4 LT |
1109 | } else if (flags & LOCK_STATE) |
1110 | locks_remove_posix(filp, (fl_owner_t) stp->st_stateowner); | |
13cd2184 | 1111 | put_nfs4_file(stp->st_file); |
5ac049ac | 1112 | kmem_cache_free(stateid_slab, stp); |
1da177e4 LT |
1113 | } |
1114 | ||
fd39ca9a | 1115 | static void |
1da177e4 LT |
1116 | move_to_close_lru(struct nfs4_stateowner *sop) |
1117 | { | |
1118 | dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); | |
1119 | ||
358dd55a | 1120 | list_move_tail(&sop->so_close_lru, &close_lru); |
1da177e4 LT |
1121 | sop->so_time = get_seconds(); |
1122 | } | |
1123 | ||
1da177e4 | 1124 | static int |
599e0a22 BF |
1125 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
1126 | clientid_t *clid) | |
1127 | { | |
1128 | return (sop->so_owner.len == owner->len) && | |
1129 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
1130 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
1131 | } |
1132 | ||
1133 | static struct nfs4_stateowner * | |
1134 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) | |
1135 | { | |
1136 | struct nfs4_stateowner *so = NULL; | |
1137 | ||
1138 | list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { | |
599e0a22 | 1139 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) |
1da177e4 LT |
1140 | return so; |
1141 | } | |
1142 | return NULL; | |
1143 | } | |
1144 | ||
1145 | /* search file_hashtbl[] for file */ | |
1146 | static struct nfs4_file * | |
1147 | find_file(struct inode *ino) | |
1148 | { | |
1149 | unsigned int hashval = file_hashval(ino); | |
1150 | struct nfs4_file *fp; | |
1151 | ||
1152 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { | |
13cd2184 N |
1153 | if (fp->fi_inode == ino) { |
1154 | get_nfs4_file(fp); | |
1da177e4 | 1155 | return fp; |
13cd2184 | 1156 | } |
1da177e4 LT |
1157 | } |
1158 | return NULL; | |
1159 | } | |
1160 | ||
8838dc43 | 1161 | static inline int access_valid(u32 x) |
ba5a6a19 | 1162 | { |
8838dc43 BF |
1163 | if (x < NFS4_SHARE_ACCESS_READ) |
1164 | return 0; | |
1165 | if (x > NFS4_SHARE_ACCESS_BOTH) | |
1166 | return 0; | |
1167 | return 1; | |
ba5a6a19 BF |
1168 | } |
1169 | ||
8838dc43 | 1170 | static inline int deny_valid(u32 x) |
ba5a6a19 | 1171 | { |
8838dc43 BF |
1172 | /* Note: unlike access bits, deny bits may be zero. */ |
1173 | return x <= NFS4_SHARE_DENY_BOTH; | |
ba5a6a19 | 1174 | } |
1da177e4 | 1175 | |
4f83aa30 BF |
1176 | /* |
1177 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
1178 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
1179 | * only what share bits are currently in force, but also what | |
1180 | * combinations of share bits previous opens have used. This allows us | |
1181 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
1182 | * return an error if the client attempt to downgrade to a combination | |
1183 | * of share bits not explicable by closing some of its previous opens. | |
1184 | * | |
1185 | * XXX: This enforcement is actually incomplete, since we don't keep | |
1186 | * track of access/deny bit combinations; so, e.g., we allow: | |
1187 | * | |
1188 | * OPEN allow read, deny write | |
1189 | * OPEN allow both, deny none | |
1190 | * DOWNGRADE allow read, deny none | |
1191 | * | |
1192 | * which we should reject. | |
1193 | */ | |
fd39ca9a | 1194 | static void |
1da177e4 LT |
1195 | set_access(unsigned int *access, unsigned long bmap) { |
1196 | int i; | |
1197 | ||
1198 | *access = 0; | |
1199 | for (i = 1; i < 4; i++) { | |
1200 | if (test_bit(i, &bmap)) | |
1201 | *access |= i; | |
1202 | } | |
1203 | } | |
1204 | ||
fd39ca9a | 1205 | static void |
1da177e4 LT |
1206 | set_deny(unsigned int *deny, unsigned long bmap) { |
1207 | int i; | |
1208 | ||
1209 | *deny = 0; | |
1210 | for (i = 0; i < 4; i++) { | |
1211 | if (test_bit(i, &bmap)) | |
1212 | *deny |= i ; | |
1213 | } | |
1214 | } | |
1215 | ||
1216 | static int | |
1217 | test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { | |
1218 | unsigned int access, deny; | |
1219 | ||
1220 | set_access(&access, stp->st_access_bmap); | |
1221 | set_deny(&deny, stp->st_deny_bmap); | |
1222 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) | |
1223 | return 0; | |
1224 | return 1; | |
1225 | } | |
1226 | ||
1227 | /* | |
1228 | * Called to check deny when READ with all zero stateid or | |
1229 | * WRITE with all zero or all one stateid | |
1230 | */ | |
b37ad28b | 1231 | static __be32 |
1da177e4 LT |
1232 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
1233 | { | |
1234 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
1235 | struct nfs4_file *fp; | |
1236 | struct nfs4_stateid *stp; | |
b37ad28b | 1237 | __be32 ret; |
1da177e4 LT |
1238 | |
1239 | dprintk("NFSD: nfs4_share_conflict\n"); | |
1240 | ||
1241 | fp = find_file(ino); | |
13cd2184 N |
1242 | if (!fp) |
1243 | return nfs_ok; | |
b700949b | 1244 | ret = nfserr_locked; |
1da177e4 | 1245 | /* Search for conflicting share reservations */ |
13cd2184 N |
1246 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
1247 | if (test_bit(deny_type, &stp->st_deny_bmap) || | |
1248 | test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) | |
1249 | goto out; | |
1da177e4 | 1250 | } |
13cd2184 N |
1251 | ret = nfs_ok; |
1252 | out: | |
1253 | put_nfs4_file(fp); | |
1254 | return ret; | |
1da177e4 LT |
1255 | } |
1256 | ||
1257 | static inline void | |
1258 | nfs4_file_downgrade(struct file *filp, unsigned int share_access) | |
1259 | { | |
1260 | if (share_access & NFS4_SHARE_ACCESS_WRITE) { | |
aceaf78d | 1261 | drop_file_write_access(filp); |
1da177e4 LT |
1262 | filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE; |
1263 | } | |
1264 | } | |
1265 | ||
1266 | /* | |
1267 | * Recall a delegation | |
1268 | */ | |
1269 | static int | |
1270 | do_recall(void *__dp) | |
1271 | { | |
1272 | struct nfs4_delegation *dp = __dp; | |
1273 | ||
47f9940c | 1274 | dp->dl_file->fi_had_conflict = true; |
1da177e4 LT |
1275 | nfsd4_cb_recall(dp); |
1276 | return 0; | |
1277 | } | |
1278 | ||
1279 | /* | |
1280 | * Spawn a thread to perform a recall on the delegation represented | |
1281 | * by the lease (file_lock) | |
1282 | * | |
1283 | * Called from break_lease() with lock_kernel() held. | |
1284 | * Note: we assume break_lease will only call this *once* for any given | |
1285 | * lease. | |
1286 | */ | |
1287 | static | |
1288 | void nfsd_break_deleg_cb(struct file_lock *fl) | |
1289 | { | |
1290 | struct nfs4_delegation *dp= (struct nfs4_delegation *)fl->fl_owner; | |
1291 | struct task_struct *t; | |
1292 | ||
1293 | dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl); | |
1294 | if (!dp) | |
1295 | return; | |
1296 | ||
1297 | /* We're assuming the state code never drops its reference | |
1298 | * without first removing the lease. Since we're in this lease | |
1299 | * callback (and since the lease code is serialized by the kernel | |
1300 | * lock) we know the server hasn't removed the lease yet, we know | |
1301 | * it's safe to take a reference: */ | |
1302 | atomic_inc(&dp->dl_count); | |
cfdcad4d | 1303 | atomic_inc(&dp->dl_client->cl_count); |
1da177e4 LT |
1304 | |
1305 | spin_lock(&recall_lock); | |
1306 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); | |
1307 | spin_unlock(&recall_lock); | |
1308 | ||
1309 | /* only place dl_time is set. protected by lock_kernel*/ | |
1310 | dp->dl_time = get_seconds(); | |
1311 | ||
0272e1fd BF |
1312 | /* |
1313 | * We don't want the locks code to timeout the lease for us; | |
1314 | * we'll remove it ourself if the delegation isn't returned | |
1315 | * in time. | |
1316 | */ | |
1317 | fl->fl_break_time = 0; | |
1da177e4 LT |
1318 | |
1319 | t = kthread_run(do_recall, dp, "%s", "nfs4_cb_recall"); | |
1320 | if (IS_ERR(t)) { | |
1321 | struct nfs4_client *clp = dp->dl_client; | |
1322 | ||
1323 | printk(KERN_INFO "NFSD: Callback thread failed for " | |
1324 | "for client (clientid %08x/%08x)\n", | |
1325 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
cfdcad4d | 1326 | put_nfs4_client(dp->dl_client); |
1da177e4 LT |
1327 | nfs4_put_delegation(dp); |
1328 | } | |
1329 | } | |
1330 | ||
1331 | /* | |
1332 | * The file_lock is being reapd. | |
1333 | * | |
1334 | * Called by locks_free_lock() with lock_kernel() held. | |
1335 | */ | |
1336 | static | |
1337 | void nfsd_release_deleg_cb(struct file_lock *fl) | |
1338 | { | |
1339 | struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; | |
1340 | ||
1341 | dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count)); | |
1342 | ||
1343 | if (!(fl->fl_flags & FL_LEASE) || !dp) | |
1344 | return; | |
1345 | dp->dl_flock = NULL; | |
1346 | } | |
1347 | ||
1348 | /* | |
1349 | * Set the delegation file_lock back pointer. | |
1350 | * | |
a9933cea | 1351 | * Called from setlease() with lock_kernel() held. |
1da177e4 LT |
1352 | */ |
1353 | static | |
1354 | void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl) | |
1355 | { | |
1356 | struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner; | |
1357 | ||
1358 | dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp); | |
1359 | if (!dp) | |
1360 | return; | |
1361 | dp->dl_flock = new; | |
1362 | } | |
1363 | ||
1364 | /* | |
a9933cea | 1365 | * Called from setlease() with lock_kernel() held |
1da177e4 LT |
1366 | */ |
1367 | static | |
1368 | int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try) | |
1369 | { | |
1370 | struct nfs4_delegation *onlistd = | |
1371 | (struct nfs4_delegation *)onlist->fl_owner; | |
1372 | struct nfs4_delegation *tryd = | |
1373 | (struct nfs4_delegation *)try->fl_owner; | |
1374 | ||
1375 | if (onlist->fl_lmops != try->fl_lmops) | |
1376 | return 0; | |
1377 | ||
1378 | return onlistd->dl_client == tryd->dl_client; | |
1379 | } | |
1380 | ||
1381 | ||
1382 | static | |
1383 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
1384 | { | |
1385 | if (arg & F_UNLCK) | |
1386 | return lease_modify(onlist, arg); | |
1387 | else | |
1388 | return -EAGAIN; | |
1389 | } | |
1390 | ||
fd39ca9a | 1391 | static struct lock_manager_operations nfsd_lease_mng_ops = { |
1da177e4 LT |
1392 | .fl_break = nfsd_break_deleg_cb, |
1393 | .fl_release_private = nfsd_release_deleg_cb, | |
1394 | .fl_copy_lock = nfsd_copy_lock_deleg_cb, | |
1395 | .fl_mylease = nfsd_same_client_deleg_cb, | |
1396 | .fl_change = nfsd_change_deleg_cb, | |
1397 | }; | |
1398 | ||
1399 | ||
b37ad28b | 1400 | __be32 |
1da177e4 LT |
1401 | nfsd4_process_open1(struct nfsd4_open *open) |
1402 | { | |
1da177e4 LT |
1403 | clientid_t *clientid = &open->op_clientid; |
1404 | struct nfs4_client *clp = NULL; | |
1405 | unsigned int strhashval; | |
1406 | struct nfs4_stateowner *sop = NULL; | |
1407 | ||
1da177e4 | 1408 | if (!check_name(open->op_owner)) |
0f442aa2 | 1409 | return nfserr_inval; |
1da177e4 LT |
1410 | |
1411 | if (STALE_CLIENTID(&open->op_clientid)) | |
1412 | return nfserr_stale_clientid; | |
1413 | ||
1414 | strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner); | |
1415 | sop = find_openstateowner_str(strhashval, open); | |
0f442aa2 BF |
1416 | open->op_stateowner = sop; |
1417 | if (!sop) { | |
1418 | /* Make sure the client's lease hasn't expired. */ | |
1da177e4 LT |
1419 | clp = find_confirmed_client(clientid); |
1420 | if (clp == NULL) | |
0f442aa2 BF |
1421 | return nfserr_expired; |
1422 | goto renew; | |
1da177e4 | 1423 | } |
0f442aa2 BF |
1424 | if (!sop->so_confirmed) { |
1425 | /* Replace unconfirmed owners without checking for replay. */ | |
1426 | clp = sop->so_client; | |
1427 | release_stateowner(sop); | |
1428 | open->op_stateowner = NULL; | |
1429 | goto renew; | |
1430 | } | |
1431 | if (open->op_seqid == sop->so_seqid - 1) { | |
1432 | if (sop->so_replay.rp_buflen) | |
a90b061c | 1433 | return nfserr_replay_me; |
0f442aa2 BF |
1434 | /* The original OPEN failed so spectacularly |
1435 | * that we don't even have replay data saved! | |
1436 | * Therefore, we have no choice but to continue | |
1437 | * processing this OPEN; presumably, we'll | |
1438 | * fail again for the same reason. | |
1439 | */ | |
1440 | dprintk("nfsd4_process_open1: replay with no replay cache\n"); | |
1441 | goto renew; | |
1442 | } | |
1443 | if (open->op_seqid != sop->so_seqid) | |
1444 | return nfserr_bad_seqid; | |
1da177e4 | 1445 | renew: |
0f442aa2 BF |
1446 | if (open->op_stateowner == NULL) { |
1447 | sop = alloc_init_open_stateowner(strhashval, clp, open); | |
1448 | if (sop == NULL) | |
1449 | return nfserr_resource; | |
1450 | open->op_stateowner = sop; | |
1451 | } | |
1452 | list_del_init(&sop->so_close_lru); | |
1da177e4 | 1453 | renew_client(sop->so_client); |
0f442aa2 | 1454 | return nfs_ok; |
1da177e4 LT |
1455 | } |
1456 | ||
b37ad28b | 1457 | static inline __be32 |
4a6e43e6 N |
1458 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
1459 | { | |
1460 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
1461 | return nfserr_openmode; | |
1462 | else | |
1463 | return nfs_ok; | |
1464 | } | |
1465 | ||
52f4fb43 N |
1466 | static struct nfs4_delegation * |
1467 | find_delegation_file(struct nfs4_file *fp, stateid_t *stid) | |
1468 | { | |
1469 | struct nfs4_delegation *dp; | |
1470 | ||
ea1da636 | 1471 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) { |
52f4fb43 N |
1472 | if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) |
1473 | return dp; | |
1474 | } | |
1475 | return NULL; | |
1476 | } | |
1477 | ||
b37ad28b | 1478 | static __be32 |
567d9829 N |
1479 | nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, |
1480 | struct nfs4_delegation **dp) | |
1481 | { | |
1482 | int flags; | |
b37ad28b | 1483 | __be32 status = nfserr_bad_stateid; |
567d9829 N |
1484 | |
1485 | *dp = find_delegation_file(fp, &open->op_delegate_stateid); | |
1486 | if (*dp == NULL) | |
c44c5eeb | 1487 | goto out; |
567d9829 N |
1488 | flags = open->op_share_access == NFS4_SHARE_ACCESS_READ ? |
1489 | RD_STATE : WR_STATE; | |
1490 | status = nfs4_check_delegmode(*dp, flags); | |
1491 | if (status) | |
1492 | *dp = NULL; | |
c44c5eeb N |
1493 | out: |
1494 | if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
1495 | return nfs_ok; | |
1496 | if (status) | |
1497 | return status; | |
1498 | open->op_stateowner->so_confirmed = 1; | |
1499 | return nfs_ok; | |
567d9829 N |
1500 | } |
1501 | ||
b37ad28b | 1502 | static __be32 |
1da177e4 LT |
1503 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) |
1504 | { | |
1505 | struct nfs4_stateid *local; | |
b37ad28b | 1506 | __be32 status = nfserr_share_denied; |
1da177e4 LT |
1507 | struct nfs4_stateowner *sop = open->op_stateowner; |
1508 | ||
8beefa24 | 1509 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
1510 | /* ignore lock owners */ |
1511 | if (local->st_stateowner->so_is_open_owner == 0) | |
1512 | continue; | |
1513 | /* remember if we have seen this open owner */ | |
1514 | if (local->st_stateowner == sop) | |
1515 | *stpp = local; | |
1516 | /* check for conflicting share reservations */ | |
1517 | if (!test_share(local, open)) | |
1518 | goto out; | |
1519 | } | |
1520 | status = 0; | |
1521 | out: | |
1522 | return status; | |
1523 | } | |
1524 | ||
5ac049ac N |
1525 | static inline struct nfs4_stateid * |
1526 | nfs4_alloc_stateid(void) | |
1527 | { | |
1528 | return kmem_cache_alloc(stateid_slab, GFP_KERNEL); | |
1529 | } | |
1530 | ||
b37ad28b | 1531 | static __be32 |
1da177e4 | 1532 | nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, |
567d9829 | 1533 | struct nfs4_delegation *dp, |
1da177e4 LT |
1534 | struct svc_fh *cur_fh, int flags) |
1535 | { | |
1536 | struct nfs4_stateid *stp; | |
1da177e4 | 1537 | |
5ac049ac | 1538 | stp = nfs4_alloc_stateid(); |
1da177e4 LT |
1539 | if (stp == NULL) |
1540 | return nfserr_resource; | |
1541 | ||
567d9829 N |
1542 | if (dp) { |
1543 | get_file(dp->dl_vfs_file); | |
1544 | stp->st_vfs_file = dp->dl_vfs_file; | |
1545 | } else { | |
b37ad28b | 1546 | __be32 status; |
567d9829 N |
1547 | status = nfsd_open(rqstp, cur_fh, S_IFREG, flags, |
1548 | &stp->st_vfs_file); | |
1549 | if (status) { | |
1550 | if (status == nfserr_dropit) | |
1551 | status = nfserr_jukebox; | |
5ac049ac | 1552 | kmem_cache_free(stateid_slab, stp); |
567d9829 N |
1553 | return status; |
1554 | } | |
1da177e4 | 1555 | } |
1da177e4 LT |
1556 | *stpp = stp; |
1557 | return 0; | |
1558 | } | |
1559 | ||
b37ad28b | 1560 | static inline __be32 |
1da177e4 LT |
1561 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
1562 | struct nfsd4_open *open) | |
1563 | { | |
1564 | struct iattr iattr = { | |
1565 | .ia_valid = ATTR_SIZE, | |
1566 | .ia_size = 0, | |
1567 | }; | |
1568 | if (!open->op_truncate) | |
1569 | return 0; | |
1570 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 1571 | return nfserr_inval; |
1da177e4 LT |
1572 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
1573 | } | |
1574 | ||
b37ad28b | 1575 | static __be32 |
1da177e4 LT |
1576 | nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open) |
1577 | { | |
1578 | struct file *filp = stp->st_vfs_file; | |
7eaa36e2 | 1579 | struct inode *inode = filp->f_path.dentry->d_inode; |
6c26d08f | 1580 | unsigned int share_access, new_writer; |
b37ad28b | 1581 | __be32 status; |
1da177e4 LT |
1582 | |
1583 | set_access(&share_access, stp->st_access_bmap); | |
6c26d08f BF |
1584 | new_writer = (~share_access) & open->op_share_access |
1585 | & NFS4_SHARE_ACCESS_WRITE; | |
1da177e4 | 1586 | |
6c26d08f | 1587 | if (new_writer) { |
b37ad28b AV |
1588 | int err = get_write_access(inode); |
1589 | if (err) | |
1590 | return nfserrno(err); | |
e518f056 BH |
1591 | err = mnt_want_write(cur_fh->fh_export->ex_path.mnt); |
1592 | if (err) | |
1593 | return nfserrno(err); | |
1594 | file_take_write(filp); | |
6c26d08f | 1595 | } |
1da177e4 LT |
1596 | status = nfsd4_truncate(rqstp, cur_fh, open); |
1597 | if (status) { | |
6c26d08f BF |
1598 | if (new_writer) |
1599 | put_write_access(inode); | |
1da177e4 LT |
1600 | return status; |
1601 | } | |
1602 | /* remember the open */ | |
6c26d08f | 1603 | filp->f_mode |= open->op_share_access; |
b55e0ba1 BF |
1604 | __set_bit(open->op_share_access, &stp->st_access_bmap); |
1605 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); | |
1da177e4 LT |
1606 | |
1607 | return nfs_ok; | |
1608 | } | |
1609 | ||
1610 | ||
1da177e4 | 1611 | static void |
37515177 | 1612 | nfs4_set_claim_prev(struct nfsd4_open *open) |
1da177e4 | 1613 | { |
37515177 N |
1614 | open->op_stateowner->so_confirmed = 1; |
1615 | open->op_stateowner->so_client->cl_firststate = 1; | |
1da177e4 LT |
1616 | } |
1617 | ||
1618 | /* | |
1619 | * Attempt to hand out a delegation. | |
1620 | */ | |
1621 | static void | |
1622 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) | |
1623 | { | |
1624 | struct nfs4_delegation *dp; | |
1625 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
1626 | struct nfs4_callback *cb = &sop->so_client->cl_callback; | |
1627 | struct file_lock fl, *flp = &fl; | |
1628 | int status, flag = 0; | |
1629 | ||
1630 | flag = NFS4_OPEN_DELEGATE_NONE; | |
7b190fec N |
1631 | open->op_recall = 0; |
1632 | switch (open->op_claim_type) { | |
1633 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
1634 | if (!atomic_read(&cb->cb_set)) | |
1635 | open->op_recall = 1; | |
1636 | flag = open->op_delegate_type; | |
1637 | if (flag == NFS4_OPEN_DELEGATE_NONE) | |
1638 | goto out; | |
1639 | break; | |
1640 | case NFS4_OPEN_CLAIM_NULL: | |
1641 | /* Let's not give out any delegations till everyone's | |
1642 | * had the chance to reclaim theirs.... */ | |
1643 | if (nfs4_in_grace()) | |
1644 | goto out; | |
1645 | if (!atomic_read(&cb->cb_set) || !sop->so_confirmed) | |
1646 | goto out; | |
1647 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | |
1648 | flag = NFS4_OPEN_DELEGATE_WRITE; | |
1649 | else | |
1650 | flag = NFS4_OPEN_DELEGATE_READ; | |
1651 | break; | |
1652 | default: | |
1653 | goto out; | |
1654 | } | |
1da177e4 LT |
1655 | |
1656 | dp = alloc_init_deleg(sop->so_client, stp, fh, flag); | |
1657 | if (dp == NULL) { | |
1658 | flag = NFS4_OPEN_DELEGATE_NONE; | |
1659 | goto out; | |
1660 | } | |
1661 | locks_init_lock(&fl); | |
1662 | fl.fl_lmops = &nfsd_lease_mng_ops; | |
1663 | fl.fl_flags = FL_LEASE; | |
9167f501 | 1664 | fl.fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; |
1da177e4 LT |
1665 | fl.fl_end = OFFSET_MAX; |
1666 | fl.fl_owner = (fl_owner_t)dp; | |
1667 | fl.fl_file = stp->st_vfs_file; | |
1668 | fl.fl_pid = current->tgid; | |
1669 | ||
a9933cea | 1670 | /* vfs_setlease checks to see if delegation should be handed out. |
1da177e4 LT |
1671 | * the lock_manager callbacks fl_mylease and fl_change are used |
1672 | */ | |
9167f501 | 1673 | if ((status = vfs_setlease(stp->st_vfs_file, fl.fl_type, &flp))) { |
1da177e4 | 1674 | dprintk("NFSD: setlease failed [%d], no delegation\n", status); |
c907132d | 1675 | unhash_delegation(dp); |
1da177e4 LT |
1676 | flag = NFS4_OPEN_DELEGATE_NONE; |
1677 | goto out; | |
1678 | } | |
1679 | ||
1680 | memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); | |
1681 | ||
1682 | dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n", | |
1683 | dp->dl_stateid.si_boot, | |
1684 | dp->dl_stateid.si_stateownerid, | |
1685 | dp->dl_stateid.si_fileid, | |
1686 | dp->dl_stateid.si_generation); | |
1687 | out: | |
7b190fec N |
1688 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS |
1689 | && flag == NFS4_OPEN_DELEGATE_NONE | |
1690 | && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) | |
2fdada03 | 1691 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
1da177e4 LT |
1692 | open->op_delegate_type = flag; |
1693 | } | |
1694 | ||
1695 | /* | |
1696 | * called with nfs4_lock_state() held. | |
1697 | */ | |
b37ad28b | 1698 | __be32 |
1da177e4 LT |
1699 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
1700 | { | |
1701 | struct nfs4_file *fp = NULL; | |
1702 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
1703 | struct nfs4_stateid *stp = NULL; | |
567d9829 | 1704 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 1705 | __be32 status; |
1da177e4 LT |
1706 | |
1707 | status = nfserr_inval; | |
ba5a6a19 BF |
1708 | if (!access_valid(open->op_share_access) |
1709 | || !deny_valid(open->op_share_deny)) | |
1da177e4 LT |
1710 | goto out; |
1711 | /* | |
1712 | * Lookup file; if found, lookup stateid and check open request, | |
1713 | * and check for delegations in the process of being recalled. | |
1714 | * If not found, create the nfs4_file struct | |
1715 | */ | |
1716 | fp = find_file(ino); | |
1717 | if (fp) { | |
1718 | if ((status = nfs4_check_open(fp, open, &stp))) | |
1719 | goto out; | |
c44c5eeb N |
1720 | status = nfs4_check_deleg(fp, open, &dp); |
1721 | if (status) | |
1722 | goto out; | |
1da177e4 | 1723 | } else { |
c44c5eeb N |
1724 | status = nfserr_bad_stateid; |
1725 | if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
1726 | goto out; | |
1da177e4 LT |
1727 | status = nfserr_resource; |
1728 | fp = alloc_init_file(ino); | |
1729 | if (fp == NULL) | |
1730 | goto out; | |
1731 | } | |
1732 | ||
1733 | /* | |
1734 | * OPEN the file, or upgrade an existing OPEN. | |
1735 | * If truncate fails, the OPEN fails. | |
1736 | */ | |
1737 | if (stp) { | |
1738 | /* Stateid was found, this is an OPEN upgrade */ | |
1739 | status = nfs4_upgrade_open(rqstp, current_fh, stp, open); | |
1740 | if (status) | |
1741 | goto out; | |
444c2c07 | 1742 | update_stateid(&stp->st_stateid); |
1da177e4 LT |
1743 | } else { |
1744 | /* Stateid was not found, this is a new OPEN */ | |
1745 | int flags = 0; | |
9ecb6a08 | 1746 | if (open->op_share_access & NFS4_SHARE_ACCESS_READ) |
8837abca | 1747 | flags |= NFSD_MAY_READ; |
1da177e4 | 1748 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
8837abca | 1749 | flags |= NFSD_MAY_WRITE; |
567d9829 N |
1750 | status = nfs4_new_open(rqstp, &stp, dp, current_fh, flags); |
1751 | if (status) | |
1da177e4 LT |
1752 | goto out; |
1753 | init_stateid(stp, fp, open); | |
1754 | status = nfsd4_truncate(rqstp, current_fh, open); | |
1755 | if (status) { | |
1756 | release_stateid(stp, OPEN_STATE); | |
1757 | goto out; | |
1758 | } | |
1759 | } | |
1760 | memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
1761 | ||
1762 | /* | |
1763 | * Attempt to hand out a delegation. No error return, because the | |
1764 | * OPEN succeeds even if we fail. | |
1765 | */ | |
1766 | nfs4_open_delegation(current_fh, open, stp); | |
1767 | ||
1768 | status = nfs_ok; | |
1769 | ||
1770 | dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n", | |
1771 | stp->st_stateid.si_boot, stp->st_stateid.si_stateownerid, | |
1772 | stp->st_stateid.si_fileid, stp->st_stateid.si_generation); | |
1773 | out: | |
13cd2184 N |
1774 | if (fp) |
1775 | put_nfs4_file(fp); | |
37515177 N |
1776 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
1777 | nfs4_set_claim_prev(open); | |
1da177e4 LT |
1778 | /* |
1779 | * To finish the open response, we just need to set the rflags. | |
1780 | */ | |
1781 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
1782 | if (!open->op_stateowner->so_confirmed) | |
1783 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; | |
1784 | ||
1785 | return status; | |
1786 | } | |
1787 | ||
b37ad28b | 1788 | __be32 |
b591480b BF |
1789 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
1790 | clientid_t *clid) | |
1da177e4 LT |
1791 | { |
1792 | struct nfs4_client *clp; | |
b37ad28b | 1793 | __be32 status; |
1da177e4 LT |
1794 | |
1795 | nfs4_lock_state(); | |
1796 | dprintk("process_renew(%08x/%08x): starting\n", | |
1797 | clid->cl_boot, clid->cl_id); | |
1798 | status = nfserr_stale_clientid; | |
1799 | if (STALE_CLIENTID(clid)) | |
1800 | goto out; | |
1801 | clp = find_confirmed_client(clid); | |
1802 | status = nfserr_expired; | |
1803 | if (clp == NULL) { | |
1804 | /* We assume the client took too long to RENEW. */ | |
1805 | dprintk("nfsd4_renew: clientid not found!\n"); | |
1806 | goto out; | |
1807 | } | |
1808 | renew_client(clp); | |
1809 | status = nfserr_cb_path_down; | |
ea1da636 | 1810 | if (!list_empty(&clp->cl_delegations) |
1da177e4 LT |
1811 | && !atomic_read(&clp->cl_callback.cb_set)) |
1812 | goto out; | |
1813 | status = nfs_ok; | |
1814 | out: | |
1815 | nfs4_unlock_state(); | |
1816 | return status; | |
1817 | } | |
1818 | ||
a76b4319 N |
1819 | static void |
1820 | end_grace(void) | |
1821 | { | |
1822 | dprintk("NFSD: end of grace period\n"); | |
c7b9a459 | 1823 | nfsd4_recdir_purge_old(); |
a76b4319 N |
1824 | in_grace = 0; |
1825 | } | |
1826 | ||
fd39ca9a | 1827 | static time_t |
1da177e4 LT |
1828 | nfs4_laundromat(void) |
1829 | { | |
1830 | struct nfs4_client *clp; | |
1831 | struct nfs4_stateowner *sop; | |
1832 | struct nfs4_delegation *dp; | |
1833 | struct list_head *pos, *next, reaplist; | |
1834 | time_t cutoff = get_seconds() - NFSD_LEASE_TIME; | |
1835 | time_t t, clientid_val = NFSD_LEASE_TIME; | |
1836 | time_t u, test_val = NFSD_LEASE_TIME; | |
1837 | ||
1838 | nfs4_lock_state(); | |
1839 | ||
1840 | dprintk("NFSD: laundromat service - starting\n"); | |
a76b4319 N |
1841 | if (in_grace) |
1842 | end_grace(); | |
1da177e4 LT |
1843 | list_for_each_safe(pos, next, &client_lru) { |
1844 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1845 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
1846 | t = clp->cl_time - cutoff; | |
1847 | if (clientid_val > t) | |
1848 | clientid_val = t; | |
1849 | break; | |
1850 | } | |
1851 | dprintk("NFSD: purging unused client (clientid %08x)\n", | |
1852 | clp->cl_clientid.cl_id); | |
c7b9a459 | 1853 | nfsd4_remove_clid_dir(clp); |
1da177e4 LT |
1854 | expire_client(clp); |
1855 | } | |
1856 | INIT_LIST_HEAD(&reaplist); | |
1857 | spin_lock(&recall_lock); | |
1858 | list_for_each_safe(pos, next, &del_recall_lru) { | |
1859 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
1860 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
1861 | u = dp->dl_time - cutoff; | |
1862 | if (test_val > u) | |
1863 | test_val = u; | |
1864 | break; | |
1865 | } | |
1866 | dprintk("NFSD: purging unused delegation dp %p, fp %p\n", | |
1867 | dp, dp->dl_flock); | |
1868 | list_move(&dp->dl_recall_lru, &reaplist); | |
1869 | } | |
1870 | spin_unlock(&recall_lock); | |
1871 | list_for_each_safe(pos, next, &reaplist) { | |
1872 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
1873 | list_del_init(&dp->dl_recall_lru); | |
1874 | unhash_delegation(dp); | |
1875 | } | |
1876 | test_val = NFSD_LEASE_TIME; | |
1877 | list_for_each_safe(pos, next, &close_lru) { | |
1878 | sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); | |
1879 | if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { | |
1880 | u = sop->so_time - cutoff; | |
1881 | if (test_val > u) | |
1882 | test_val = u; | |
1883 | break; | |
1884 | } | |
1885 | dprintk("NFSD: purging unused open stateowner (so_id %d)\n", | |
1886 | sop->so_id); | |
358dd55a | 1887 | release_stateowner(sop); |
1da177e4 LT |
1888 | } |
1889 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
1890 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
1891 | nfs4_unlock_state(); | |
1892 | return clientid_val; | |
1893 | } | |
1894 | ||
a254b246 HH |
1895 | static struct workqueue_struct *laundry_wq; |
1896 | static void laundromat_main(struct work_struct *); | |
1897 | static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); | |
1898 | ||
1899 | static void | |
c4028958 | 1900 | laundromat_main(struct work_struct *not_used) |
1da177e4 LT |
1901 | { |
1902 | time_t t; | |
1903 | ||
1904 | t = nfs4_laundromat(); | |
1905 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); | |
58da282b | 1906 | queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); |
1da177e4 LT |
1907 | } |
1908 | ||
fd39ca9a | 1909 | static struct nfs4_stateowner * |
f8816512 N |
1910 | search_close_lru(u32 st_id, int flags) |
1911 | { | |
1da177e4 LT |
1912 | struct nfs4_stateowner *local = NULL; |
1913 | ||
1da177e4 LT |
1914 | if (flags & CLOSE_STATE) { |
1915 | list_for_each_entry(local, &close_lru, so_close_lru) { | |
1916 | if (local->so_id == st_id) | |
1917 | return local; | |
1918 | } | |
1919 | } | |
1920 | return NULL; | |
1921 | } | |
1922 | ||
1923 | static inline int | |
1924 | nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) | |
1925 | { | |
7eaa36e2 | 1926 | return fhp->fh_dentry->d_inode != stp->st_vfs_file->f_path.dentry->d_inode; |
1da177e4 LT |
1927 | } |
1928 | ||
1929 | static int | |
1930 | STALE_STATEID(stateid_t *stateid) | |
1931 | { | |
1932 | if (stateid->si_boot == boot_time) | |
1933 | return 0; | |
849823c5 | 1934 | dprintk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n", |
1da177e4 LT |
1935 | stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, |
1936 | stateid->si_generation); | |
1937 | return 1; | |
1938 | } | |
1939 | ||
1940 | static inline int | |
1941 | access_permit_read(unsigned long access_bmap) | |
1942 | { | |
1943 | return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || | |
1944 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || | |
1945 | test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); | |
1946 | } | |
1947 | ||
1948 | static inline int | |
1949 | access_permit_write(unsigned long access_bmap) | |
1950 | { | |
1951 | return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || | |
1952 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); | |
1953 | } | |
1954 | ||
1955 | static | |
b37ad28b | 1956 | __be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags) |
1da177e4 | 1957 | { |
b37ad28b | 1958 | __be32 status = nfserr_openmode; |
1da177e4 LT |
1959 | |
1960 | if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) | |
1961 | goto out; | |
1962 | if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) | |
1963 | goto out; | |
1964 | status = nfs_ok; | |
1965 | out: | |
1966 | return status; | |
1967 | } | |
1968 | ||
b37ad28b | 1969 | static inline __be32 |
1da177e4 LT |
1970 | check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) |
1971 | { | |
1972 | /* Trying to call delegreturn with a special stateid? Yuch: */ | |
1973 | if (!(flags & (RD_STATE | WR_STATE))) | |
1974 | return nfserr_bad_stateid; | |
1975 | else if (ONE_STATEID(stateid) && (flags & RD_STATE)) | |
1976 | return nfs_ok; | |
1977 | else if (nfs4_in_grace()) { | |
1978 | /* Answer in remaining cases depends on existance of | |
1979 | * conflicting state; so we must wait out the grace period. */ | |
1980 | return nfserr_grace; | |
1981 | } else if (flags & WR_STATE) | |
1982 | return nfs4_share_conflict(current_fh, | |
1983 | NFS4_SHARE_DENY_WRITE); | |
1984 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
1985 | return nfs4_share_conflict(current_fh, | |
1986 | NFS4_SHARE_DENY_READ); | |
1987 | } | |
1988 | ||
1989 | /* | |
1990 | * Allow READ/WRITE during grace period on recovered state only for files | |
1991 | * that are not able to provide mandatory locking. | |
1992 | */ | |
1993 | static inline int | |
1994 | io_during_grace_disallowed(struct inode *inode, int flags) | |
1995 | { | |
1996 | return nfs4_in_grace() && (flags & (RD_STATE | WR_STATE)) | |
a16877ca | 1997 | && mandatory_lock(inode); |
1da177e4 LT |
1998 | } |
1999 | ||
0836f587 BF |
2000 | static int check_stateid_generation(stateid_t *in, stateid_t *ref) |
2001 | { | |
2002 | /* If the client sends us a stateid from the future, it's buggy: */ | |
2003 | if (in->si_generation > ref->si_generation) | |
2004 | return nfserr_bad_stateid; | |
2005 | /* | |
2006 | * The following, however, can happen. For example, if the | |
2007 | * client sends an open and some IO at the same time, the open | |
2008 | * may bump si_generation while the IO is still in flight. | |
2009 | * Thanks to hard links and renames, the client never knows what | |
2010 | * file an open will affect. So it could avoid that situation | |
2011 | * only by serializing all opens and IO from the same open | |
2012 | * owner. To recover from the old_stateid error, the client | |
2013 | * will just have to retry the IO: | |
2014 | */ | |
2015 | if (in->si_generation < ref->si_generation) | |
2016 | return nfserr_old_stateid; | |
2017 | return nfs_ok; | |
2018 | } | |
2019 | ||
1da177e4 LT |
2020 | /* |
2021 | * Checks for stateid operations | |
2022 | */ | |
b37ad28b | 2023 | __be32 |
1da177e4 LT |
2024 | nfs4_preprocess_stateid_op(struct svc_fh *current_fh, stateid_t *stateid, int flags, struct file **filpp) |
2025 | { | |
2026 | struct nfs4_stateid *stp = NULL; | |
2027 | struct nfs4_delegation *dp = NULL; | |
2028 | stateid_t *stidp; | |
2029 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
b37ad28b | 2030 | __be32 status; |
1da177e4 LT |
2031 | |
2032 | dprintk("NFSD: preprocess_stateid_op: stateid = (%08x/%08x/%08x/%08x)\n", | |
2033 | stateid->si_boot, stateid->si_stateownerid, | |
2034 | stateid->si_fileid, stateid->si_generation); | |
2035 | if (filpp) | |
2036 | *filpp = NULL; | |
2037 | ||
2038 | if (io_during_grace_disallowed(ino, flags)) | |
2039 | return nfserr_grace; | |
2040 | ||
2041 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
2042 | return check_special_stateids(current_fh, stateid, flags); | |
2043 | ||
2044 | /* STALE STATEID */ | |
2045 | status = nfserr_stale_stateid; | |
2046 | if (STALE_STATEID(stateid)) | |
2047 | goto out; | |
2048 | ||
2049 | /* BAD STATEID */ | |
2050 | status = nfserr_bad_stateid; | |
2051 | if (!stateid->si_fileid) { /* delegation stateid */ | |
2052 | if(!(dp = find_delegation_stateid(ino, stateid))) { | |
2053 | dprintk("NFSD: delegation stateid not found\n"); | |
1da177e4 LT |
2054 | goto out; |
2055 | } | |
2056 | stidp = &dp->dl_stateid; | |
2057 | } else { /* open or lock stateid */ | |
2058 | if (!(stp = find_stateid(stateid, flags))) { | |
2059 | dprintk("NFSD: open or lock stateid not found\n"); | |
1da177e4 LT |
2060 | goto out; |
2061 | } | |
2062 | if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp)) | |
2063 | goto out; | |
2064 | if (!stp->st_stateowner->so_confirmed) | |
2065 | goto out; | |
2066 | stidp = &stp->st_stateid; | |
2067 | } | |
0836f587 BF |
2068 | status = check_stateid_generation(stateid, stidp); |
2069 | if (status) | |
1da177e4 LT |
2070 | goto out; |
2071 | if (stp) { | |
2072 | if ((status = nfs4_check_openmode(stp,flags))) | |
2073 | goto out; | |
2074 | renew_client(stp->st_stateowner->so_client); | |
2075 | if (filpp) | |
2076 | *filpp = stp->st_vfs_file; | |
6a85fa3a | 2077 | } else { |
1da177e4 LT |
2078 | if ((status = nfs4_check_delegmode(dp, flags))) |
2079 | goto out; | |
2080 | renew_client(dp->dl_client); | |
2081 | if (flags & DELEG_RET) | |
2082 | unhash_delegation(dp); | |
2083 | if (filpp) | |
2084 | *filpp = dp->dl_vfs_file; | |
2085 | } | |
2086 | status = nfs_ok; | |
2087 | out: | |
2088 | return status; | |
2089 | } | |
2090 | ||
4c4cd222 N |
2091 | static inline int |
2092 | setlkflg (int type) | |
2093 | { | |
2094 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
2095 | RD_STATE : WR_STATE; | |
2096 | } | |
1da177e4 LT |
2097 | |
2098 | /* | |
2099 | * Checks for sequence id mutating operations. | |
2100 | */ | |
b37ad28b | 2101 | static __be32 |
4c4cd222 | 2102 | 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 | 2103 | { |
1da177e4 LT |
2104 | struct nfs4_stateid *stp; |
2105 | struct nfs4_stateowner *sop; | |
0836f587 | 2106 | __be32 status; |
1da177e4 LT |
2107 | |
2108 | dprintk("NFSD: preprocess_seqid_op: seqid=%d " | |
2109 | "stateid = (%08x/%08x/%08x/%08x)\n", seqid, | |
2110 | stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, | |
2111 | stateid->si_generation); | |
3a4f98bb | 2112 | |
1da177e4 LT |
2113 | *stpp = NULL; |
2114 | *sopp = NULL; | |
2115 | ||
1da177e4 | 2116 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { |
2fdada03 | 2117 | dprintk("NFSD: preprocess_seqid_op: magic stateid!\n"); |
3a4f98bb | 2118 | return nfserr_bad_stateid; |
1da177e4 LT |
2119 | } |
2120 | ||
1da177e4 | 2121 | if (STALE_STATEID(stateid)) |
3a4f98bb | 2122 | return nfserr_stale_stateid; |
1da177e4 LT |
2123 | /* |
2124 | * We return BAD_STATEID if filehandle doesn't match stateid, | |
2125 | * the confirmed flag is incorrecly set, or the generation | |
2126 | * number is incorrect. | |
1da177e4 | 2127 | */ |
f8816512 N |
2128 | stp = find_stateid(stateid, flags); |
2129 | if (stp == NULL) { | |
2130 | /* | |
2131 | * Also, we should make sure this isn't just the result of | |
2132 | * a replayed close: | |
2133 | */ | |
2134 | sop = search_close_lru(stateid->si_stateownerid, flags); | |
2135 | if (sop == NULL) | |
2136 | return nfserr_bad_stateid; | |
2137 | *sopp = sop; | |
2138 | goto check_replay; | |
2139 | } | |
1da177e4 | 2140 | |
39325bd0 BF |
2141 | *stpp = stp; |
2142 | *sopp = sop = stp->st_stateowner; | |
2143 | ||
4c4cd222 | 2144 | if (lock) { |
4c4cd222 | 2145 | clientid_t *lockclid = &lock->v.new.clientid; |
1da177e4 | 2146 | struct nfs4_client *clp = sop->so_client; |
4c4cd222 | 2147 | int lkflg = 0; |
b37ad28b | 2148 | __be32 status; |
4c4cd222 N |
2149 | |
2150 | lkflg = setlkflg(lock->lk_type); | |
2151 | ||
2152 | if (lock->lk_is_new) { | |
599e0a22 BF |
2153 | if (!sop->so_is_open_owner) |
2154 | return nfserr_bad_stateid; | |
2155 | if (!same_clid(&clp->cl_clientid, lockclid)) | |
4c4cd222 | 2156 | return nfserr_bad_stateid; |
599e0a22 BF |
2157 | /* stp is the open stateid */ |
2158 | status = nfs4_check_openmode(stp, lkflg); | |
2159 | if (status) | |
2160 | return status; | |
2161 | } else { | |
2162 | /* stp is the lock stateid */ | |
2163 | status = nfs4_check_openmode(stp->st_openstp, lkflg); | |
2164 | if (status) | |
2165 | return status; | |
4c4cd222 | 2166 | } |
1da177e4 LT |
2167 | } |
2168 | ||
f3362737 | 2169 | if (nfs4_check_fh(current_fh, stp)) { |
2fdada03 | 2170 | dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); |
3a4f98bb | 2171 | return nfserr_bad_stateid; |
1da177e4 LT |
2172 | } |
2173 | ||
1da177e4 LT |
2174 | /* |
2175 | * We now validate the seqid and stateid generation numbers. | |
2176 | * For the moment, we ignore the possibility of | |
2177 | * generation number wraparound. | |
2178 | */ | |
bd9aac52 | 2179 | if (seqid != sop->so_seqid) |
1da177e4 LT |
2180 | goto check_replay; |
2181 | ||
3a4f98bb | 2182 | if (sop->so_confirmed && flags & CONFIRM) { |
2fdada03 | 2183 | dprintk("NFSD: preprocess_seqid_op: expected" |
3a4f98bb N |
2184 | " unconfirmed stateowner!\n"); |
2185 | return nfserr_bad_stateid; | |
1da177e4 | 2186 | } |
3a4f98bb | 2187 | if (!sop->so_confirmed && !(flags & CONFIRM)) { |
2fdada03 | 2188 | dprintk("NFSD: preprocess_seqid_op: stateowner not" |
3a4f98bb N |
2189 | " confirmed yet!\n"); |
2190 | return nfserr_bad_stateid; | |
1da177e4 | 2191 | } |
0836f587 BF |
2192 | status = check_stateid_generation(stateid, &stp->st_stateid); |
2193 | if (status) | |
2194 | return status; | |
52fd004e | 2195 | renew_client(sop->so_client); |
3a4f98bb | 2196 | return nfs_ok; |
1da177e4 | 2197 | |
1da177e4 | 2198 | check_replay: |
bd9aac52 | 2199 | if (seqid == sop->so_seqid - 1) { |
849823c5 | 2200 | dprintk("NFSD: preprocess_seqid_op: retransmission?\n"); |
1da177e4 | 2201 | /* indicate replay to calling function */ |
a90b061c | 2202 | return nfserr_replay_me; |
1da177e4 | 2203 | } |
2fdada03 | 2204 | dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n", |
3a4f98bb N |
2205 | sop->so_seqid, seqid); |
2206 | *sopp = NULL; | |
2207 | return nfserr_bad_seqid; | |
1da177e4 LT |
2208 | } |
2209 | ||
b37ad28b | 2210 | __be32 |
ca364317 | 2211 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 2212 | struct nfsd4_open_confirm *oc) |
1da177e4 | 2213 | { |
b37ad28b | 2214 | __be32 status; |
1da177e4 LT |
2215 | struct nfs4_stateowner *sop; |
2216 | struct nfs4_stateid *stp; | |
2217 | ||
2218 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | |
ca364317 BF |
2219 | (int)cstate->current_fh.fh_dentry->d_name.len, |
2220 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 2221 | |
ca364317 | 2222 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
2223 | if (status) |
2224 | return status; | |
1da177e4 LT |
2225 | |
2226 | nfs4_lock_state(); | |
2227 | ||
ca364317 BF |
2228 | if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
2229 | oc->oc_seqid, &oc->oc_req_stateid, | |
f3362737 | 2230 | CONFIRM | OPEN_STATE, |
1da177e4 LT |
2231 | &oc->oc_stateowner, &stp, NULL))) |
2232 | goto out; | |
2233 | ||
2234 | sop = oc->oc_stateowner; | |
2235 | sop->so_confirmed = 1; | |
2236 | update_stateid(&stp->st_stateid); | |
2237 | memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2238 | dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d " | |
2239 | "stateid=(%08x/%08x/%08x/%08x)\n", oc->oc_seqid, | |
2240 | stp->st_stateid.si_boot, | |
2241 | stp->st_stateid.si_stateownerid, | |
2242 | stp->st_stateid.si_fileid, | |
2243 | stp->st_stateid.si_generation); | |
c7b9a459 N |
2244 | |
2245 | nfsd4_create_clid_dir(sop->so_client); | |
1da177e4 | 2246 | out: |
f2327d9a | 2247 | if (oc->oc_stateowner) { |
1da177e4 | 2248 | nfs4_get_stateowner(oc->oc_stateowner); |
a4f1706a | 2249 | cstate->replay_owner = oc->oc_stateowner; |
f2327d9a | 2250 | } |
1da177e4 LT |
2251 | nfs4_unlock_state(); |
2252 | return status; | |
2253 | } | |
2254 | ||
2255 | ||
2256 | /* | |
2257 | * unset all bits in union bitmap (bmap) that | |
2258 | * do not exist in share (from successful OPEN_DOWNGRADE) | |
2259 | */ | |
2260 | static void | |
2261 | reset_union_bmap_access(unsigned long access, unsigned long *bmap) | |
2262 | { | |
2263 | int i; | |
2264 | for (i = 1; i < 4; i++) { | |
2265 | if ((i & access) != i) | |
2266 | __clear_bit(i, bmap); | |
2267 | } | |
2268 | } | |
2269 | ||
2270 | static void | |
2271 | reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) | |
2272 | { | |
2273 | int i; | |
2274 | for (i = 0; i < 4; i++) { | |
2275 | if ((i & deny) != i) | |
2276 | __clear_bit(i, bmap); | |
2277 | } | |
2278 | } | |
2279 | ||
b37ad28b | 2280 | __be32 |
ca364317 BF |
2281 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
2282 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 2283 | struct nfsd4_open_downgrade *od) |
1da177e4 | 2284 | { |
b37ad28b | 2285 | __be32 status; |
1da177e4 LT |
2286 | struct nfs4_stateid *stp; |
2287 | unsigned int share_access; | |
2288 | ||
2289 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | |
ca364317 BF |
2290 | (int)cstate->current_fh.fh_dentry->d_name.len, |
2291 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 2292 | |
ba5a6a19 BF |
2293 | if (!access_valid(od->od_share_access) |
2294 | || !deny_valid(od->od_share_deny)) | |
1da177e4 LT |
2295 | return nfserr_inval; |
2296 | ||
2297 | nfs4_lock_state(); | |
ca364317 BF |
2298 | if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
2299 | od->od_seqid, | |
1da177e4 | 2300 | &od->od_stateid, |
f3362737 | 2301 | OPEN_STATE, |
1da177e4 LT |
2302 | &od->od_stateowner, &stp, NULL))) |
2303 | goto out; | |
2304 | ||
2305 | status = nfserr_inval; | |
2306 | if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { | |
2307 | dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
2308 | stp->st_access_bmap, od->od_share_access); | |
2309 | goto out; | |
2310 | } | |
2311 | if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { | |
2312 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", | |
2313 | stp->st_deny_bmap, od->od_share_deny); | |
2314 | goto out; | |
2315 | } | |
2316 | set_access(&share_access, stp->st_access_bmap); | |
2317 | nfs4_file_downgrade(stp->st_vfs_file, | |
2318 | share_access & ~od->od_share_access); | |
2319 | ||
2320 | reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap); | |
2321 | reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); | |
2322 | ||
2323 | update_stateid(&stp->st_stateid); | |
2324 | memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2325 | status = nfs_ok; | |
2326 | out: | |
f2327d9a | 2327 | if (od->od_stateowner) { |
1da177e4 | 2328 | nfs4_get_stateowner(od->od_stateowner); |
a4f1706a | 2329 | cstate->replay_owner = od->od_stateowner; |
f2327d9a | 2330 | } |
1da177e4 LT |
2331 | nfs4_unlock_state(); |
2332 | return status; | |
2333 | } | |
2334 | ||
2335 | /* | |
2336 | * nfs4_unlock_state() called after encode | |
2337 | */ | |
b37ad28b | 2338 | __be32 |
ca364317 | 2339 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 2340 | struct nfsd4_close *close) |
1da177e4 | 2341 | { |
b37ad28b | 2342 | __be32 status; |
1da177e4 LT |
2343 | struct nfs4_stateid *stp; |
2344 | ||
2345 | dprintk("NFSD: nfsd4_close on file %.*s\n", | |
ca364317 BF |
2346 | (int)cstate->current_fh.fh_dentry->d_name.len, |
2347 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 LT |
2348 | |
2349 | nfs4_lock_state(); | |
2350 | /* check close_lru for replay */ | |
ca364317 BF |
2351 | if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
2352 | close->cl_seqid, | |
1da177e4 | 2353 | &close->cl_stateid, |
f3362737 | 2354 | OPEN_STATE | CLOSE_STATE, |
1da177e4 LT |
2355 | &close->cl_stateowner, &stp, NULL))) |
2356 | goto out; | |
1da177e4 LT |
2357 | status = nfs_ok; |
2358 | update_stateid(&stp->st_stateid); | |
2359 | memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2360 | ||
04ef5954 BF |
2361 | /* release_stateid() calls nfsd_close() if needed */ |
2362 | release_stateid(stp, OPEN_STATE); | |
2363 | ||
2364 | /* place unused nfs4_stateowners on so_close_lru list to be | |
2365 | * released by the laundromat service after the lease period | |
2366 | * to enable us to handle CLOSE replay | |
2367 | */ | |
2368 | if (list_empty(&close->cl_stateowner->so_stateids)) | |
2369 | move_to_close_lru(close->cl_stateowner); | |
1da177e4 | 2370 | out: |
f2327d9a | 2371 | if (close->cl_stateowner) { |
1da177e4 | 2372 | nfs4_get_stateowner(close->cl_stateowner); |
a4f1706a | 2373 | cstate->replay_owner = close->cl_stateowner; |
f2327d9a | 2374 | } |
1da177e4 LT |
2375 | nfs4_unlock_state(); |
2376 | return status; | |
2377 | } | |
2378 | ||
b37ad28b | 2379 | __be32 |
ca364317 BF |
2380 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2381 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 2382 | { |
b37ad28b | 2383 | __be32 status; |
1da177e4 | 2384 | |
ca364317 | 2385 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 LT |
2386 | goto out; |
2387 | ||
2388 | nfs4_lock_state(); | |
ca364317 BF |
2389 | status = nfs4_preprocess_stateid_op(&cstate->current_fh, |
2390 | &dr->dr_stateid, DELEG_RET, NULL); | |
1da177e4 LT |
2391 | nfs4_unlock_state(); |
2392 | out: | |
2393 | return status; | |
2394 | } | |
2395 | ||
2396 | ||
2397 | /* | |
2398 | * Lock owner state (byte-range locks) | |
2399 | */ | |
2400 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) | |
2401 | #define LOCK_HASH_BITS 8 | |
2402 | #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) | |
2403 | #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) | |
2404 | ||
2405 | #define lockownerid_hashval(id) \ | |
2406 | ((id) & LOCK_HASH_MASK) | |
2407 | ||
2408 | static inline unsigned int | |
2409 | lock_ownerstr_hashval(struct inode *inode, u32 cl_id, | |
2410 | struct xdr_netobj *ownername) | |
2411 | { | |
2412 | return (file_hashval(inode) + cl_id | |
2413 | + opaque_hashval(ownername->data, ownername->len)) | |
2414 | & LOCK_HASH_MASK; | |
2415 | } | |
2416 | ||
2417 | static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; | |
2418 | static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; | |
2419 | static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; | |
2420 | ||
fd39ca9a | 2421 | static struct nfs4_stateid * |
1da177e4 LT |
2422 | find_stateid(stateid_t *stid, int flags) |
2423 | { | |
2424 | struct nfs4_stateid *local = NULL; | |
2425 | u32 st_id = stid->si_stateownerid; | |
2426 | u32 f_id = stid->si_fileid; | |
2427 | unsigned int hashval; | |
2428 | ||
2429 | dprintk("NFSD: find_stateid flags 0x%x\n",flags); | |
2430 | if ((flags & LOCK_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) { | |
2431 | hashval = stateid_hashval(st_id, f_id); | |
2432 | list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { | |
2433 | if ((local->st_stateid.si_stateownerid == st_id) && | |
2434 | (local->st_stateid.si_fileid == f_id)) | |
2435 | return local; | |
2436 | } | |
2437 | } | |
2438 | if ((flags & OPEN_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) { | |
2439 | hashval = stateid_hashval(st_id, f_id); | |
2440 | list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { | |
2441 | if ((local->st_stateid.si_stateownerid == st_id) && | |
2442 | (local->st_stateid.si_fileid == f_id)) | |
2443 | return local; | |
2444 | } | |
849823c5 | 2445 | } |
1da177e4 LT |
2446 | return NULL; |
2447 | } | |
2448 | ||
2449 | static struct nfs4_delegation * | |
2450 | find_delegation_stateid(struct inode *ino, stateid_t *stid) | |
2451 | { | |
13cd2184 N |
2452 | struct nfs4_file *fp; |
2453 | struct nfs4_delegation *dl; | |
1da177e4 LT |
2454 | |
2455 | dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n", | |
2456 | stid->si_boot, stid->si_stateownerid, | |
2457 | stid->si_fileid, stid->si_generation); | |
2458 | ||
1da177e4 | 2459 | fp = find_file(ino); |
13cd2184 N |
2460 | if (!fp) |
2461 | return NULL; | |
2462 | dl = find_delegation_file(fp, stid); | |
2463 | put_nfs4_file(fp); | |
2464 | return dl; | |
1da177e4 LT |
2465 | } |
2466 | ||
2467 | /* | |
2468 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
2469 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
2470 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
2471 | * locking, this prevents us from being completely protocol-compliant. The | |
2472 | * real solution to this problem is to start using unsigned file offsets in | |
2473 | * the VFS, but this is a very deep change! | |
2474 | */ | |
2475 | static inline void | |
2476 | nfs4_transform_lock_offset(struct file_lock *lock) | |
2477 | { | |
2478 | if (lock->fl_start < 0) | |
2479 | lock->fl_start = OFFSET_MAX; | |
2480 | if (lock->fl_end < 0) | |
2481 | lock->fl_end = OFFSET_MAX; | |
2482 | } | |
2483 | ||
d5b9026a N |
2484 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
2485 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
e465a77f | 2486 | static struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 2487 | }; |
1da177e4 LT |
2488 | |
2489 | static inline void | |
2490 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
2491 | { | |
d5b9026a N |
2492 | struct nfs4_stateowner *sop; |
2493 | unsigned int hval; | |
1da177e4 | 2494 | |
d5b9026a N |
2495 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
2496 | sop = (struct nfs4_stateowner *) fl->fl_owner; | |
2497 | hval = lockownerid_hashval(sop->so_id); | |
1da177e4 LT |
2498 | kref_get(&sop->so_ref); |
2499 | deny->ld_sop = sop; | |
2500 | deny->ld_clientid = sop->so_client->cl_clientid; | |
d5b9026a N |
2501 | } else { |
2502 | deny->ld_sop = NULL; | |
2503 | deny->ld_clientid.cl_boot = 0; | |
2504 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
2505 | } |
2506 | deny->ld_start = fl->fl_start; | |
2507 | deny->ld_length = ~(u64)0; | |
2508 | if (fl->fl_end != ~(u64)0) | |
2509 | deny->ld_length = fl->fl_end - fl->fl_start + 1; | |
2510 | deny->ld_type = NFS4_READ_LT; | |
2511 | if (fl->fl_type != F_RDLCK) | |
2512 | deny->ld_type = NFS4_WRITE_LT; | |
2513 | } | |
2514 | ||
1da177e4 LT |
2515 | static struct nfs4_stateowner * |
2516 | find_lockstateowner_str(struct inode *inode, clientid_t *clid, | |
2517 | struct xdr_netobj *owner) | |
2518 | { | |
2519 | unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); | |
2520 | struct nfs4_stateowner *op; | |
2521 | ||
2522 | list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { | |
599e0a22 | 2523 | if (same_owner_str(op, owner, clid)) |
1da177e4 LT |
2524 | return op; |
2525 | } | |
2526 | return NULL; | |
2527 | } | |
2528 | ||
2529 | /* | |
2530 | * Alloc a lock owner structure. | |
2531 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
2532 | * occured. | |
2533 | * | |
2534 | * strhashval = lock_ownerstr_hashval | |
1da177e4 LT |
2535 | */ |
2536 | ||
2537 | static struct nfs4_stateowner * | |
2538 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { | |
2539 | struct nfs4_stateowner *sop; | |
2540 | struct nfs4_replay *rp; | |
2541 | unsigned int idhashval; | |
2542 | ||
2543 | if (!(sop = alloc_stateowner(&lock->lk_new_owner))) | |
2544 | return NULL; | |
2545 | idhashval = lockownerid_hashval(current_ownerid); | |
2546 | INIT_LIST_HEAD(&sop->so_idhash); | |
2547 | INIT_LIST_HEAD(&sop->so_strhash); | |
2548 | INIT_LIST_HEAD(&sop->so_perclient); | |
ea1da636 N |
2549 | INIT_LIST_HEAD(&sop->so_stateids); |
2550 | INIT_LIST_HEAD(&sop->so_perstateid); | |
1da177e4 LT |
2551 | INIT_LIST_HEAD(&sop->so_close_lru); /* not used */ |
2552 | sop->so_time = 0; | |
2553 | list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); | |
2554 | list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); | |
ea1da636 | 2555 | list_add(&sop->so_perstateid, &open_stp->st_lockowners); |
1da177e4 LT |
2556 | sop->so_is_open_owner = 0; |
2557 | sop->so_id = current_ownerid++; | |
2558 | sop->so_client = clp; | |
b59e3c0e NB |
2559 | /* It is the openowner seqid that will be incremented in encode in the |
2560 | * case of new lockowners; so increment the lock seqid manually: */ | |
2561 | sop->so_seqid = lock->lk_new_lock_seqid + 1; | |
1da177e4 LT |
2562 | sop->so_confirmed = 1; |
2563 | rp = &sop->so_replay; | |
de1ae286 | 2564 | rp->rp_status = nfserr_serverfault; |
1da177e4 LT |
2565 | rp->rp_buflen = 0; |
2566 | rp->rp_buf = rp->rp_ibuf; | |
2567 | return sop; | |
2568 | } | |
2569 | ||
fd39ca9a | 2570 | static struct nfs4_stateid * |
1da177e4 LT |
2571 | alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) |
2572 | { | |
2573 | struct nfs4_stateid *stp; | |
2574 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); | |
2575 | ||
5ac049ac N |
2576 | stp = nfs4_alloc_stateid(); |
2577 | if (stp == NULL) | |
1da177e4 LT |
2578 | goto out; |
2579 | INIT_LIST_HEAD(&stp->st_hash); | |
2580 | INIT_LIST_HEAD(&stp->st_perfile); | |
ea1da636 N |
2581 | INIT_LIST_HEAD(&stp->st_perstateowner); |
2582 | INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ | |
1da177e4 | 2583 | list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); |
8beefa24 | 2584 | list_add(&stp->st_perfile, &fp->fi_stateids); |
ea1da636 | 2585 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
1da177e4 | 2586 | stp->st_stateowner = sop; |
13cd2184 | 2587 | get_nfs4_file(fp); |
1da177e4 LT |
2588 | stp->st_file = fp; |
2589 | stp->st_stateid.si_boot = boot_time; | |
2590 | stp->st_stateid.si_stateownerid = sop->so_id; | |
2591 | stp->st_stateid.si_fileid = fp->fi_id; | |
2592 | stp->st_stateid.si_generation = 0; | |
2593 | stp->st_vfs_file = open_stp->st_vfs_file; /* FIXME refcount?? */ | |
2594 | stp->st_access_bmap = open_stp->st_access_bmap; | |
2595 | stp->st_deny_bmap = open_stp->st_deny_bmap; | |
4c4cd222 | 2596 | stp->st_openstp = open_stp; |
1da177e4 LT |
2597 | |
2598 | out: | |
2599 | return stp; | |
2600 | } | |
2601 | ||
fd39ca9a | 2602 | static int |
1da177e4 LT |
2603 | check_lock_length(u64 offset, u64 length) |
2604 | { | |
2605 | return ((length == 0) || ((length != ~(u64)0) && | |
2606 | LOFF_OVERFLOW(offset, length))); | |
2607 | } | |
2608 | ||
2609 | /* | |
2610 | * LOCK operation | |
2611 | */ | |
b37ad28b | 2612 | __be32 |
ca364317 | 2613 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 2614 | struct nfsd4_lock *lock) |
1da177e4 | 2615 | { |
3e9e3dbe | 2616 | struct nfs4_stateowner *open_sop = NULL; |
b59e3c0e | 2617 | struct nfs4_stateowner *lock_sop = NULL; |
1da177e4 LT |
2618 | struct nfs4_stateid *lock_stp; |
2619 | struct file *filp; | |
2620 | struct file_lock file_lock; | |
8dc7c311 | 2621 | struct file_lock conflock; |
b37ad28b | 2622 | __be32 status = 0; |
1da177e4 | 2623 | unsigned int strhashval; |
150b3934 | 2624 | unsigned int cmd; |
b8dd7b9a | 2625 | int err; |
1da177e4 LT |
2626 | |
2627 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
2628 | (long long) lock->lk_offset, | |
2629 | (long long) lock->lk_length); | |
2630 | ||
1da177e4 LT |
2631 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
2632 | return nfserr_inval; | |
2633 | ||
ca364317 | 2634 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 2635 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
2636 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
2637 | return status; | |
2638 | } | |
2639 | ||
1da177e4 LT |
2640 | nfs4_lock_state(); |
2641 | ||
2642 | if (lock->lk_is_new) { | |
893f8770 N |
2643 | /* |
2644 | * Client indicates that this is a new lockowner. | |
2645 | * Use open owner and open stateid to create lock owner and | |
2646 | * lock stateid. | |
2647 | */ | |
1da177e4 LT |
2648 | struct nfs4_stateid *open_stp = NULL; |
2649 | struct nfs4_file *fp; | |
2650 | ||
2651 | status = nfserr_stale_clientid; | |
849823c5 | 2652 | if (STALE_CLIENTID(&lock->lk_new_clientid)) |
1da177e4 | 2653 | goto out; |
1da177e4 | 2654 | |
1da177e4 | 2655 | /* validate and update open stateid and open seqid */ |
ca364317 | 2656 | status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
1da177e4 LT |
2657 | lock->lk_new_open_seqid, |
2658 | &lock->lk_new_open_stateid, | |
f3362737 | 2659 | OPEN_STATE, |
3a65588a | 2660 | &lock->lk_replay_owner, &open_stp, |
b59e3c0e | 2661 | lock); |
37515177 | 2662 | if (status) |
1da177e4 | 2663 | goto out; |
3a65588a | 2664 | open_sop = lock->lk_replay_owner; |
1da177e4 LT |
2665 | /* create lockowner and lock stateid */ |
2666 | fp = open_stp->st_file; | |
2667 | strhashval = lock_ownerstr_hashval(fp->fi_inode, | |
2668 | open_sop->so_client->cl_clientid.cl_id, | |
2669 | &lock->v.new.owner); | |
3e9e3dbe N |
2670 | /* XXX: Do we need to check for duplicate stateowners on |
2671 | * the same file, or should they just be allowed (and | |
2672 | * create new stateids)? */ | |
1da177e4 | 2673 | status = nfserr_resource; |
b59e3c0e NB |
2674 | lock_sop = alloc_init_lock_stateowner(strhashval, |
2675 | open_sop->so_client, open_stp, lock); | |
2676 | if (lock_sop == NULL) | |
1da177e4 | 2677 | goto out; |
b59e3c0e | 2678 | lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); |
8a280510 | 2679 | if (lock_stp == NULL) |
1da177e4 | 2680 | goto out; |
1da177e4 LT |
2681 | } else { |
2682 | /* lock (lock owner + lock stateid) already exists */ | |
ca364317 | 2683 | status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
1da177e4 LT |
2684 | lock->lk_old_lock_seqid, |
2685 | &lock->lk_old_lock_stateid, | |
f3362737 | 2686 | LOCK_STATE, |
3a65588a | 2687 | &lock->lk_replay_owner, &lock_stp, lock); |
1da177e4 LT |
2688 | if (status) |
2689 | goto out; | |
3a65588a | 2690 | lock_sop = lock->lk_replay_owner; |
1da177e4 | 2691 | } |
3a65588a | 2692 | /* lock->lk_replay_owner and lock_stp have been created or found */ |
1da177e4 LT |
2693 | filp = lock_stp->st_vfs_file; |
2694 | ||
0dd395dc N |
2695 | status = nfserr_grace; |
2696 | if (nfs4_in_grace() && !lock->lk_reclaim) | |
2697 | goto out; | |
2698 | status = nfserr_no_grace; | |
2699 | if (!nfs4_in_grace() && lock->lk_reclaim) | |
2700 | goto out; | |
2701 | ||
1da177e4 LT |
2702 | locks_init_lock(&file_lock); |
2703 | switch (lock->lk_type) { | |
2704 | case NFS4_READ_LT: | |
2705 | case NFS4_READW_LT: | |
2706 | file_lock.fl_type = F_RDLCK; | |
150b3934 | 2707 | cmd = F_SETLK; |
1da177e4 LT |
2708 | break; |
2709 | case NFS4_WRITE_LT: | |
2710 | case NFS4_WRITEW_LT: | |
2711 | file_lock.fl_type = F_WRLCK; | |
150b3934 | 2712 | cmd = F_SETLK; |
1da177e4 LT |
2713 | break; |
2714 | default: | |
2715 | status = nfserr_inval; | |
2716 | goto out; | |
2717 | } | |
b59e3c0e | 2718 | file_lock.fl_owner = (fl_owner_t)lock_sop; |
1da177e4 LT |
2719 | file_lock.fl_pid = current->tgid; |
2720 | file_lock.fl_file = filp; | |
2721 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 2722 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
2723 | |
2724 | file_lock.fl_start = lock->lk_offset; | |
2725 | if ((lock->lk_length == ~(u64)0) || | |
2726 | LOFF_OVERFLOW(lock->lk_offset, lock->lk_length)) | |
2727 | file_lock.fl_end = ~(u64)0; | |
2728 | else | |
2729 | file_lock.fl_end = lock->lk_offset + lock->lk_length - 1; | |
2730 | nfs4_transform_lock_offset(&file_lock); | |
2731 | ||
2732 | /* | |
2733 | * Try to lock the file in the VFS. | |
2734 | * Note: locks.c uses the BKL to protect the inode's lock list. | |
2735 | */ | |
2736 | ||
fd85b817 | 2737 | err = vfs_lock_file(filp, cmd, &file_lock, &conflock); |
b8dd7b9a | 2738 | switch (-err) { |
1da177e4 LT |
2739 | case 0: /* success! */ |
2740 | update_stateid(&lock_stp->st_stateid); | |
2741 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, | |
2742 | sizeof(stateid_t)); | |
b8dd7b9a | 2743 | status = 0; |
eb76b3fd AA |
2744 | break; |
2745 | case (EAGAIN): /* conflock holds conflicting lock */ | |
2746 | status = nfserr_denied; | |
2747 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
2748 | nfs4_set_lock_denied(&conflock, &lock->lk_denied); | |
2749 | break; | |
1da177e4 LT |
2750 | case (EDEADLK): |
2751 | status = nfserr_deadlock; | |
eb76b3fd | 2752 | break; |
1da177e4 | 2753 | default: |
fd85b817 | 2754 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
eb76b3fd AA |
2755 | status = nfserr_resource; |
2756 | break; | |
1da177e4 | 2757 | } |
1da177e4 | 2758 | out: |
8a280510 BF |
2759 | if (status && lock->lk_is_new && lock_sop) |
2760 | release_stateowner(lock_sop); | |
3a65588a BF |
2761 | if (lock->lk_replay_owner) { |
2762 | nfs4_get_stateowner(lock->lk_replay_owner); | |
a4f1706a | 2763 | cstate->replay_owner = lock->lk_replay_owner; |
f2327d9a | 2764 | } |
1da177e4 LT |
2765 | nfs4_unlock_state(); |
2766 | return status; | |
2767 | } | |
2768 | ||
2769 | /* | |
2770 | * LOCKT operation | |
2771 | */ | |
b37ad28b | 2772 | __be32 |
ca364317 BF |
2773 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2774 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
2775 | { |
2776 | struct inode *inode; | |
2777 | struct file file; | |
2778 | struct file_lock file_lock; | |
fd85b817 | 2779 | int error; |
b37ad28b | 2780 | __be32 status; |
1da177e4 LT |
2781 | |
2782 | if (nfs4_in_grace()) | |
2783 | return nfserr_grace; | |
2784 | ||
2785 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
2786 | return nfserr_inval; | |
2787 | ||
2788 | lockt->lt_stateowner = NULL; | |
2789 | nfs4_lock_state(); | |
2790 | ||
2791 | status = nfserr_stale_clientid; | |
849823c5 | 2792 | if (STALE_CLIENTID(&lockt->lt_clientid)) |
1da177e4 | 2793 | goto out; |
1da177e4 | 2794 | |
ca364317 | 2795 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) { |
849823c5 | 2796 | dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n"); |
1da177e4 LT |
2797 | if (status == nfserr_symlink) |
2798 | status = nfserr_inval; | |
2799 | goto out; | |
2800 | } | |
2801 | ||
ca364317 | 2802 | inode = cstate->current_fh.fh_dentry->d_inode; |
1da177e4 LT |
2803 | locks_init_lock(&file_lock); |
2804 | switch (lockt->lt_type) { | |
2805 | case NFS4_READ_LT: | |
2806 | case NFS4_READW_LT: | |
2807 | file_lock.fl_type = F_RDLCK; | |
2808 | break; | |
2809 | case NFS4_WRITE_LT: | |
2810 | case NFS4_WRITEW_LT: | |
2811 | file_lock.fl_type = F_WRLCK; | |
2812 | break; | |
2813 | default: | |
2fdada03 | 2814 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
2815 | status = nfserr_inval; |
2816 | goto out; | |
2817 | } | |
2818 | ||
2819 | lockt->lt_stateowner = find_lockstateowner_str(inode, | |
2820 | &lockt->lt_clientid, &lockt->lt_owner); | |
2821 | if (lockt->lt_stateowner) | |
2822 | file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; | |
2823 | file_lock.fl_pid = current->tgid; | |
2824 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 2825 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
2826 | |
2827 | file_lock.fl_start = lockt->lt_offset; | |
2828 | if ((lockt->lt_length == ~(u64)0) || LOFF_OVERFLOW(lockt->lt_offset, lockt->lt_length)) | |
2829 | file_lock.fl_end = ~(u64)0; | |
2830 | else | |
2831 | file_lock.fl_end = lockt->lt_offset + lockt->lt_length - 1; | |
2832 | ||
2833 | nfs4_transform_lock_offset(&file_lock); | |
2834 | ||
fd85b817 | 2835 | /* vfs_test_lock uses the struct file _only_ to resolve the inode. |
1da177e4 | 2836 | * since LOCKT doesn't require an OPEN, and therefore a struct |
fd85b817 | 2837 | * file may not exist, pass vfs_test_lock a struct file with |
1da177e4 LT |
2838 | * only the dentry:inode set. |
2839 | */ | |
2840 | memset(&file, 0, sizeof (struct file)); | |
ca364317 | 2841 | file.f_path.dentry = cstate->current_fh.fh_dentry; |
1da177e4 LT |
2842 | |
2843 | status = nfs_ok; | |
fd85b817 ME |
2844 | error = vfs_test_lock(&file, &file_lock); |
2845 | if (error) { | |
2846 | status = nfserrno(error); | |
2847 | goto out; | |
2848 | } | |
9d6a8c5c | 2849 | if (file_lock.fl_type != F_UNLCK) { |
1da177e4 | 2850 | status = nfserr_denied; |
9d6a8c5c | 2851 | nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); |
1da177e4 LT |
2852 | } |
2853 | out: | |
2854 | nfs4_unlock_state(); | |
2855 | return status; | |
2856 | } | |
2857 | ||
b37ad28b | 2858 | __be32 |
ca364317 | 2859 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 2860 | struct nfsd4_locku *locku) |
1da177e4 LT |
2861 | { |
2862 | struct nfs4_stateid *stp; | |
2863 | struct file *filp = NULL; | |
2864 | struct file_lock file_lock; | |
b37ad28b | 2865 | __be32 status; |
b8dd7b9a | 2866 | int err; |
1da177e4 LT |
2867 | |
2868 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", | |
2869 | (long long) locku->lu_offset, | |
2870 | (long long) locku->lu_length); | |
2871 | ||
2872 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
2873 | return nfserr_inval; | |
2874 | ||
2875 | nfs4_lock_state(); | |
2876 | ||
ca364317 | 2877 | if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
1da177e4 LT |
2878 | locku->lu_seqid, |
2879 | &locku->lu_stateid, | |
f3362737 | 2880 | LOCK_STATE, |
1da177e4 LT |
2881 | &locku->lu_stateowner, &stp, NULL))) |
2882 | goto out; | |
2883 | ||
2884 | filp = stp->st_vfs_file; | |
2885 | BUG_ON(!filp); | |
2886 | locks_init_lock(&file_lock); | |
2887 | file_lock.fl_type = F_UNLCK; | |
2888 | file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; | |
2889 | file_lock.fl_pid = current->tgid; | |
2890 | file_lock.fl_file = filp; | |
2891 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 2892 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
2893 | file_lock.fl_start = locku->lu_offset; |
2894 | ||
2895 | if ((locku->lu_length == ~(u64)0) || LOFF_OVERFLOW(locku->lu_offset, locku->lu_length)) | |
2896 | file_lock.fl_end = ~(u64)0; | |
2897 | else | |
2898 | file_lock.fl_end = locku->lu_offset + locku->lu_length - 1; | |
2899 | nfs4_transform_lock_offset(&file_lock); | |
2900 | ||
2901 | /* | |
2902 | * Try to unlock the file in the VFS. | |
2903 | */ | |
fd85b817 | 2904 | err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); |
b8dd7b9a | 2905 | if (err) { |
fd85b817 | 2906 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
2907 | goto out_nfserr; |
2908 | } | |
2909 | /* | |
2910 | * OK, unlock succeeded; the only thing left to do is update the stateid. | |
2911 | */ | |
2912 | update_stateid(&stp->st_stateid); | |
2913 | memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2914 | ||
2915 | out: | |
f2327d9a | 2916 | if (locku->lu_stateowner) { |
1da177e4 | 2917 | nfs4_get_stateowner(locku->lu_stateowner); |
a4f1706a | 2918 | cstate->replay_owner = locku->lu_stateowner; |
f2327d9a | 2919 | } |
1da177e4 LT |
2920 | nfs4_unlock_state(); |
2921 | return status; | |
2922 | ||
2923 | out_nfserr: | |
b8dd7b9a | 2924 | status = nfserrno(err); |
1da177e4 LT |
2925 | goto out; |
2926 | } | |
2927 | ||
2928 | /* | |
2929 | * returns | |
2930 | * 1: locks held by lockowner | |
2931 | * 0: no locks held by lockowner | |
2932 | */ | |
2933 | static int | |
2934 | check_for_locks(struct file *filp, struct nfs4_stateowner *lowner) | |
2935 | { | |
2936 | struct file_lock **flpp; | |
7eaa36e2 | 2937 | struct inode *inode = filp->f_path.dentry->d_inode; |
1da177e4 LT |
2938 | int status = 0; |
2939 | ||
2940 | lock_kernel(); | |
2941 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { | |
796dadfd | 2942 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
2943 | status = 1; |
2944 | goto out; | |
796dadfd | 2945 | } |
1da177e4 LT |
2946 | } |
2947 | out: | |
2948 | unlock_kernel(); | |
2949 | return status; | |
2950 | } | |
2951 | ||
b37ad28b | 2952 | __be32 |
b591480b BF |
2953 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
2954 | struct nfsd4_compound_state *cstate, | |
2955 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
2956 | { |
2957 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe N |
2958 | struct nfs4_stateowner *sop; |
2959 | struct nfs4_stateid *stp; | |
1da177e4 | 2960 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe N |
2961 | struct list_head matches; |
2962 | int i; | |
b37ad28b | 2963 | __be32 status; |
1da177e4 LT |
2964 | |
2965 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
2966 | clid->cl_boot, clid->cl_id); | |
2967 | ||
2968 | /* XXX check for lease expiration */ | |
2969 | ||
2970 | status = nfserr_stale_clientid; | |
849823c5 | 2971 | if (STALE_CLIENTID(clid)) |
1da177e4 | 2972 | return status; |
1da177e4 LT |
2973 | |
2974 | nfs4_lock_state(); | |
2975 | ||
3e9e3dbe N |
2976 | status = nfserr_locks_held; |
2977 | /* XXX: we're doing a linear search through all the lockowners. | |
2978 | * Yipes! For now we'll just hope clients aren't really using | |
2979 | * release_lockowner much, but eventually we have to fix these | |
2980 | * data structures. */ | |
2981 | INIT_LIST_HEAD(&matches); | |
2982 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
2983 | list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { | |
599e0a22 | 2984 | if (!same_owner_str(sop, owner, clid)) |
3e9e3dbe N |
2985 | continue; |
2986 | list_for_each_entry(stp, &sop->so_stateids, | |
2987 | st_perstateowner) { | |
2988 | if (check_for_locks(stp->st_vfs_file, sop)) | |
2989 | goto out; | |
2990 | /* Note: so_perclient unused for lockowners, | |
2991 | * so it's OK to fool with here. */ | |
2992 | list_add(&sop->so_perclient, &matches); | |
2993 | } | |
1da177e4 | 2994 | } |
3e9e3dbe N |
2995 | } |
2996 | /* Clients probably won't expect us to return with some (but not all) | |
2997 | * of the lockowner state released; so don't release any until all | |
2998 | * have been checked. */ | |
2999 | status = nfs_ok; | |
0fa822e4 N |
3000 | while (!list_empty(&matches)) { |
3001 | sop = list_entry(matches.next, struct nfs4_stateowner, | |
3002 | so_perclient); | |
3003 | /* unhash_stateowner deletes so_perclient only | |
3004 | * for openowners. */ | |
3005 | list_del(&sop->so_perclient); | |
3e9e3dbe | 3006 | release_stateowner(sop); |
1da177e4 LT |
3007 | } |
3008 | out: | |
3009 | nfs4_unlock_state(); | |
3010 | return status; | |
3011 | } | |
3012 | ||
3013 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 3014 | alloc_reclaim(void) |
1da177e4 | 3015 | { |
a55370a3 | 3016 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
3017 | } |
3018 | ||
c7b9a459 N |
3019 | int |
3020 | nfs4_has_reclaimed_state(const char *name) | |
3021 | { | |
3022 | unsigned int strhashval = clientstr_hashval(name); | |
3023 | struct nfs4_client *clp; | |
3024 | ||
3025 | clp = find_confirmed_client_by_str(name, strhashval); | |
3026 | return clp ? 1 : 0; | |
3027 | } | |
3028 | ||
1da177e4 LT |
3029 | /* |
3030 | * failure => all reset bets are off, nfserr_no_grace... | |
3031 | */ | |
190e4fbf N |
3032 | int |
3033 | nfs4_client_to_reclaim(const char *name) | |
1da177e4 LT |
3034 | { |
3035 | unsigned int strhashval; | |
3036 | struct nfs4_client_reclaim *crp = NULL; | |
3037 | ||
a55370a3 N |
3038 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
3039 | crp = alloc_reclaim(); | |
1da177e4 LT |
3040 | if (!crp) |
3041 | return 0; | |
a55370a3 | 3042 | strhashval = clientstr_hashval(name); |
1da177e4 LT |
3043 | INIT_LIST_HEAD(&crp->cr_strhash); |
3044 | list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); | |
a55370a3 | 3045 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
1da177e4 LT |
3046 | reclaim_str_hashtbl_size++; |
3047 | return 1; | |
3048 | } | |
3049 | ||
3050 | static void | |
3051 | nfs4_release_reclaim(void) | |
3052 | { | |
3053 | struct nfs4_client_reclaim *crp = NULL; | |
3054 | int i; | |
3055 | ||
1da177e4 LT |
3056 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
3057 | while (!list_empty(&reclaim_str_hashtbl[i])) { | |
3058 | crp = list_entry(reclaim_str_hashtbl[i].next, | |
3059 | struct nfs4_client_reclaim, cr_strhash); | |
3060 | list_del(&crp->cr_strhash); | |
1da177e4 LT |
3061 | kfree(crp); |
3062 | reclaim_str_hashtbl_size--; | |
3063 | } | |
3064 | } | |
3065 | BUG_ON(reclaim_str_hashtbl_size); | |
3066 | } | |
3067 | ||
3068 | /* | |
3069 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
fd39ca9a | 3070 | static struct nfs4_client_reclaim * |
1da177e4 LT |
3071 | nfs4_find_reclaim_client(clientid_t *clid) |
3072 | { | |
3073 | unsigned int strhashval; | |
3074 | struct nfs4_client *clp; | |
3075 | struct nfs4_client_reclaim *crp = NULL; | |
3076 | ||
3077 | ||
3078 | /* find clientid in conf_id_hashtbl */ | |
3079 | clp = find_confirmed_client(clid); | |
3080 | if (clp == NULL) | |
3081 | return NULL; | |
3082 | ||
a55370a3 N |
3083 | dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", |
3084 | clp->cl_name.len, clp->cl_name.data, | |
3085 | clp->cl_recdir); | |
1da177e4 LT |
3086 | |
3087 | /* find clp->cl_name in reclaim_str_hashtbl */ | |
a55370a3 | 3088 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 | 3089 | list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { |
a55370a3 | 3090 | if (same_name(crp->cr_recdir, clp->cl_recdir)) { |
1da177e4 LT |
3091 | return crp; |
3092 | } | |
3093 | } | |
3094 | return NULL; | |
3095 | } | |
3096 | ||
3097 | /* | |
3098 | * Called from OPEN. Look for clientid in reclaim list. | |
3099 | */ | |
b37ad28b | 3100 | __be32 |
1da177e4 LT |
3101 | nfs4_check_open_reclaim(clientid_t *clid) |
3102 | { | |
dfc83565 | 3103 | return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; |
1da177e4 LT |
3104 | } |
3105 | ||
ac4d8ff2 | 3106 | /* initialization to perform at module load time: */ |
1da177e4 | 3107 | |
e8ff2a84 | 3108 | int |
ac4d8ff2 | 3109 | nfs4_state_init(void) |
1da177e4 | 3110 | { |
e8ff2a84 | 3111 | int i, status; |
1da177e4 | 3112 | |
e8ff2a84 BF |
3113 | status = nfsd4_init_slabs(); |
3114 | if (status) | |
3115 | return status; | |
1da177e4 LT |
3116 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
3117 | INIT_LIST_HEAD(&conf_id_hashtbl[i]); | |
3118 | INIT_LIST_HEAD(&conf_str_hashtbl[i]); | |
3119 | INIT_LIST_HEAD(&unconf_str_hashtbl[i]); | |
3120 | INIT_LIST_HEAD(&unconf_id_hashtbl[i]); | |
3121 | } | |
3122 | for (i = 0; i < FILE_HASH_SIZE; i++) { | |
3123 | INIT_LIST_HEAD(&file_hashtbl[i]); | |
3124 | } | |
3125 | for (i = 0; i < OWNER_HASH_SIZE; i++) { | |
3126 | INIT_LIST_HEAD(&ownerstr_hashtbl[i]); | |
3127 | INIT_LIST_HEAD(&ownerid_hashtbl[i]); | |
3128 | } | |
3129 | for (i = 0; i < STATEID_HASH_SIZE; i++) { | |
3130 | INIT_LIST_HEAD(&stateid_hashtbl[i]); | |
3131 | INIT_LIST_HEAD(&lockstateid_hashtbl[i]); | |
3132 | } | |
3133 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
3134 | INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); | |
3135 | INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); | |
3136 | } | |
1da177e4 | 3137 | memset(&onestateid, ~0, sizeof(stateid_t)); |
1da177e4 LT |
3138 | INIT_LIST_HEAD(&close_lru); |
3139 | INIT_LIST_HEAD(&client_lru); | |
3140 | INIT_LIST_HEAD(&del_recall_lru); | |
ac4d8ff2 N |
3141 | for (i = 0; i < CLIENT_HASH_SIZE; i++) |
3142 | INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); | |
3143 | reclaim_str_hashtbl_size = 0; | |
e8ff2a84 | 3144 | return 0; |
ac4d8ff2 N |
3145 | } |
3146 | ||
190e4fbf N |
3147 | static void |
3148 | nfsd4_load_reboot_recovery_data(void) | |
3149 | { | |
3150 | int status; | |
3151 | ||
0964a3d3 N |
3152 | nfs4_lock_state(); |
3153 | nfsd4_init_recdir(user_recovery_dirname); | |
190e4fbf | 3154 | status = nfsd4_recdir_load(); |
0964a3d3 | 3155 | nfs4_unlock_state(); |
190e4fbf N |
3156 | if (status) |
3157 | printk("NFSD: Failure reading reboot recovery data\n"); | |
3158 | } | |
3159 | ||
9a8db97e ME |
3160 | unsigned long |
3161 | get_nfs4_grace_period(void) | |
3162 | { | |
3163 | return max(user_lease_time, lease_time) * HZ; | |
3164 | } | |
3165 | ||
c2f1a551 MS |
3166 | /* |
3167 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
3168 | * client may quite reasonably hang on to a delegation as long as it has | |
3169 | * the inode cached. This becomes an obvious problem the first time a | |
3170 | * client's inode cache approaches the size of the server's total memory. | |
3171 | * | |
3172 | * For now we avoid this problem by imposing a hard limit on the number | |
3173 | * of delegations, which varies according to the server's memory size. | |
3174 | */ | |
3175 | static void | |
3176 | set_max_delegations(void) | |
3177 | { | |
3178 | /* | |
3179 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
3180 | * estimates suggest that in the worst case (where every delegation | |
3181 | * is for a different inode), a delegation could take about 1.5K, | |
3182 | * giving a worst case usage of about 6% of memory. | |
3183 | */ | |
3184 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
3185 | } | |
3186 | ||
ac4d8ff2 N |
3187 | /* initialization to perform when the nfsd service is started: */ |
3188 | ||
3189 | static void | |
3190 | __nfs4_state_start(void) | |
3191 | { | |
9a8db97e | 3192 | unsigned long grace_time; |
ac4d8ff2 | 3193 | |
1da177e4 | 3194 | boot_time = get_seconds(); |
9a8db97e | 3195 | grace_time = get_nfs_grace_period(); |
d99a05ad | 3196 | lease_time = user_lease_time; |
a76b4319 | 3197 | in_grace = 1; |
9a8db97e ME |
3198 | printk(KERN_INFO "NFSD: starting %ld-second grace period\n", |
3199 | grace_time/HZ); | |
58da282b | 3200 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
9a8db97e | 3201 | queue_delayed_work(laundry_wq, &laundromat_work, grace_time); |
c2f1a551 | 3202 | set_max_delegations(); |
1da177e4 LT |
3203 | } |
3204 | ||
e8ff2a84 | 3205 | void |
76a3550e | 3206 | nfs4_state_start(void) |
1da177e4 | 3207 | { |
1da177e4 | 3208 | if (nfs4_init) |
e8ff2a84 | 3209 | return; |
190e4fbf | 3210 | nfsd4_load_reboot_recovery_data(); |
76a3550e | 3211 | __nfs4_state_start(); |
1da177e4 | 3212 | nfs4_init = 1; |
e8ff2a84 | 3213 | return; |
1da177e4 LT |
3214 | } |
3215 | ||
3216 | int | |
3217 | nfs4_in_grace(void) | |
3218 | { | |
a76b4319 | 3219 | return in_grace; |
1da177e4 LT |
3220 | } |
3221 | ||
3222 | time_t | |
3223 | nfs4_lease_time(void) | |
3224 | { | |
3225 | return lease_time; | |
3226 | } | |
3227 | ||
3228 | static void | |
3229 | __nfs4_state_shutdown(void) | |
3230 | { | |
3231 | int i; | |
3232 | struct nfs4_client *clp = NULL; | |
3233 | struct nfs4_delegation *dp = NULL; | |
1da177e4 LT |
3234 | struct list_head *pos, *next, reaplist; |
3235 | ||
1da177e4 LT |
3236 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
3237 | while (!list_empty(&conf_id_hashtbl[i])) { | |
3238 | clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
3239 | expire_client(clp); | |
3240 | } | |
3241 | while (!list_empty(&unconf_str_hashtbl[i])) { | |
3242 | clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); | |
3243 | expire_client(clp); | |
3244 | } | |
3245 | } | |
3246 | INIT_LIST_HEAD(&reaplist); | |
3247 | spin_lock(&recall_lock); | |
3248 | list_for_each_safe(pos, next, &del_recall_lru) { | |
3249 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3250 | list_move(&dp->dl_recall_lru, &reaplist); | |
3251 | } | |
3252 | spin_unlock(&recall_lock); | |
3253 | list_for_each_safe(pos, next, &reaplist) { | |
3254 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3255 | list_del_init(&dp->dl_recall_lru); | |
3256 | unhash_delegation(dp); | |
3257 | } | |
3258 | ||
190e4fbf | 3259 | nfsd4_shutdown_recdir(); |
1da177e4 | 3260 | nfs4_init = 0; |
1da177e4 LT |
3261 | } |
3262 | ||
3263 | void | |
3264 | nfs4_state_shutdown(void) | |
3265 | { | |
5e8d5c29 N |
3266 | cancel_rearming_delayed_workqueue(laundry_wq, &laundromat_work); |
3267 | destroy_workqueue(laundry_wq); | |
1da177e4 LT |
3268 | nfs4_lock_state(); |
3269 | nfs4_release_reclaim(); | |
3270 | __nfs4_state_shutdown(); | |
1da177e4 LT |
3271 | nfs4_unlock_state(); |
3272 | } | |
3273 | ||
3dd98a3b JL |
3274 | /* |
3275 | * user_recovery_dirname is protected by the nfsd_mutex since it's only | |
3276 | * accessed when nfsd is starting. | |
3277 | */ | |
0964a3d3 N |
3278 | static void |
3279 | nfs4_set_recdir(char *recdir) | |
3280 | { | |
0964a3d3 | 3281 | strcpy(user_recovery_dirname, recdir); |
0964a3d3 N |
3282 | } |
3283 | ||
3284 | /* | |
3285 | * Change the NFSv4 recovery directory to recdir. | |
3286 | */ | |
3287 | int | |
3288 | nfs4_reset_recoverydir(char *recdir) | |
3289 | { | |
3290 | int status; | |
3291 | struct nameidata nd; | |
3292 | ||
3293 | status = path_lookup(recdir, LOOKUP_FOLLOW, &nd); | |
3294 | if (status) | |
3295 | return status; | |
3296 | status = -ENOTDIR; | |
4ac91378 | 3297 | if (S_ISDIR(nd.path.dentry->d_inode->i_mode)) { |
0964a3d3 N |
3298 | nfs4_set_recdir(recdir); |
3299 | status = 0; | |
3300 | } | |
1d957f9b | 3301 | path_put(&nd.path); |
0964a3d3 N |
3302 | return status; |
3303 | } | |
3304 | ||
3dd98a3b JL |
3305 | char * |
3306 | nfs4_recoverydir(void) | |
3307 | { | |
3308 | return user_recovery_dirname; | |
3309 | } | |
3310 | ||
1da177e4 LT |
3311 | /* |
3312 | * Called when leasetime is changed. | |
3313 | * | |
d99a05ad N |
3314 | * The only way the protocol gives us to handle on-the-fly lease changes is to |
3315 | * simulate a reboot. Instead of doing that, we just wait till the next time | |
3316 | * we start to register any changes in lease time. If the administrator | |
3317 | * really wants to change the lease time *now*, they can go ahead and bring | |
3318 | * nfsd down and then back up again after changing the lease time. | |
3dd98a3b JL |
3319 | * |
3320 | * user_lease_time is protected by nfsd_mutex since it's only really accessed | |
3321 | * when nfsd is starting | |
1da177e4 LT |
3322 | */ |
3323 | void | |
3324 | nfs4_reset_lease(time_t leasetime) | |
3325 | { | |
d99a05ad | 3326 | user_lease_time = leasetime; |
1da177e4 | 3327 | } |