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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> |
68e76ad0 | 57 | #include <linux/sunrpc/svcauth_gss.h> |
1da177e4 LT |
58 | |
59 | #define NFSDDBG_FACILITY NFSDDBG_PROC | |
60 | ||
61 | /* Globals */ | |
62 | static time_t lease_time = 90; /* default lease time */ | |
d99a05ad | 63 | static time_t user_lease_time = 90; |
fd39ca9a | 64 | static time_t boot_time; |
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); | |
68e76ad0 | 381 | kfree(clp->cl_principal); |
1da177e4 LT |
382 | kfree(clp->cl_name.data); |
383 | kfree(clp); | |
384 | } | |
385 | ||
386 | void | |
387 | put_nfs4_client(struct nfs4_client *clp) | |
388 | { | |
389 | if (atomic_dec_and_test(&clp->cl_count)) | |
390 | free_client(clp); | |
391 | } | |
392 | ||
393 | static void | |
394 | expire_client(struct nfs4_client *clp) | |
395 | { | |
396 | struct nfs4_stateowner *sop; | |
397 | struct nfs4_delegation *dp; | |
1da177e4 LT |
398 | struct list_head reaplist; |
399 | ||
400 | dprintk("NFSD: expire_client cl_count %d\n", | |
401 | atomic_read(&clp->cl_count)); | |
402 | ||
1da177e4 LT |
403 | INIT_LIST_HEAD(&reaplist); |
404 | spin_lock(&recall_lock); | |
ea1da636 N |
405 | while (!list_empty(&clp->cl_delegations)) { |
406 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
1da177e4 LT |
407 | dprintk("NFSD: expire client. dp %p, fp %p\n", dp, |
408 | dp->dl_flock); | |
ea1da636 | 409 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
410 | list_move(&dp->dl_recall_lru, &reaplist); |
411 | } | |
412 | spin_unlock(&recall_lock); | |
413 | while (!list_empty(&reaplist)) { | |
414 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
415 | list_del_init(&dp->dl_recall_lru); | |
416 | unhash_delegation(dp); | |
417 | } | |
418 | list_del(&clp->cl_idhash); | |
419 | list_del(&clp->cl_strhash); | |
420 | list_del(&clp->cl_lru); | |
ea1da636 N |
421 | while (!list_empty(&clp->cl_openowners)) { |
422 | sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient); | |
1da177e4 LT |
423 | release_stateowner(sop); |
424 | } | |
425 | put_nfs4_client(clp); | |
426 | } | |
427 | ||
35bba9a3 BF |
428 | static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir) |
429 | { | |
1da177e4 LT |
430 | struct nfs4_client *clp; |
431 | ||
35bba9a3 BF |
432 | clp = alloc_client(name); |
433 | if (clp == NULL) | |
434 | return NULL; | |
a55370a3 | 435 | memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); |
1da177e4 LT |
436 | atomic_set(&clp->cl_count, 1); |
437 | atomic_set(&clp->cl_callback.cb_set, 0); | |
1da177e4 LT |
438 | INIT_LIST_HEAD(&clp->cl_idhash); |
439 | INIT_LIST_HEAD(&clp->cl_strhash); | |
ea1da636 N |
440 | INIT_LIST_HEAD(&clp->cl_openowners); |
441 | INIT_LIST_HEAD(&clp->cl_delegations); | |
1da177e4 | 442 | INIT_LIST_HEAD(&clp->cl_lru); |
1da177e4 LT |
443 | return clp; |
444 | } | |
445 | ||
35bba9a3 BF |
446 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
447 | { | |
448 | memcpy(target->cl_verifier.data, source->data, | |
449 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
450 | } |
451 | ||
35bba9a3 BF |
452 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
453 | { | |
1da177e4 LT |
454 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
455 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
456 | } | |
457 | ||
35bba9a3 BF |
458 | static void copy_cred(struct svc_cred *target, struct svc_cred *source) |
459 | { | |
1da177e4 LT |
460 | target->cr_uid = source->cr_uid; |
461 | target->cr_gid = source->cr_gid; | |
462 | target->cr_group_info = source->cr_group_info; | |
463 | get_group_info(target->cr_group_info); | |
464 | } | |
465 | ||
35bba9a3 | 466 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 467 | { |
a55370a3 | 468 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
469 | } |
470 | ||
471 | static int | |
599e0a22 BF |
472 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
473 | { | |
474 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
475 | } |
476 | ||
477 | static int | |
599e0a22 BF |
478 | same_clid(clientid_t *cl1, clientid_t *cl2) |
479 | { | |
480 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
481 | } |
482 | ||
483 | /* XXX what about NGROUP */ | |
484 | static int | |
599e0a22 BF |
485 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
486 | { | |
487 | return cr1->cr_uid == cr2->cr_uid; | |
1da177e4 LT |
488 | } |
489 | ||
5ec7b46c BF |
490 | static void gen_clid(struct nfs4_client *clp) |
491 | { | |
492 | static u32 current_clientid = 1; | |
493 | ||
1da177e4 LT |
494 | clp->cl_clientid.cl_boot = boot_time; |
495 | clp->cl_clientid.cl_id = current_clientid++; | |
496 | } | |
497 | ||
deda2faa BF |
498 | static void gen_confirm(struct nfs4_client *clp) |
499 | { | |
500 | static u32 i; | |
501 | u32 *p; | |
1da177e4 | 502 | |
1da177e4 | 503 | p = (u32 *)clp->cl_confirm.data; |
deda2faa BF |
504 | *p++ = get_seconds(); |
505 | *p++ = i++; | |
1da177e4 LT |
506 | } |
507 | ||
35bba9a3 BF |
508 | static int check_name(struct xdr_netobj name) |
509 | { | |
1da177e4 LT |
510 | if (name.len == 0) |
511 | return 0; | |
512 | if (name.len > NFS4_OPAQUE_LIMIT) { | |
2fdada03 | 513 | dprintk("NFSD: check_name: name too long(%d)!\n", name.len); |
1da177e4 LT |
514 | return 0; |
515 | } | |
516 | return 1; | |
517 | } | |
518 | ||
fd39ca9a | 519 | static void |
1da177e4 LT |
520 | add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) |
521 | { | |
522 | unsigned int idhashval; | |
523 | ||
524 | list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); | |
525 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
526 | list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); | |
527 | list_add_tail(&clp->cl_lru, &client_lru); | |
528 | clp->cl_time = get_seconds(); | |
529 | } | |
530 | ||
fd39ca9a | 531 | static void |
1da177e4 LT |
532 | move_to_confirmed(struct nfs4_client *clp) |
533 | { | |
534 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
535 | unsigned int strhashval; | |
536 | ||
537 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
538 | list_del_init(&clp->cl_strhash); | |
f116629d | 539 | list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); |
a55370a3 | 540 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 LT |
541 | list_add(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); |
542 | renew_client(clp); | |
543 | } | |
544 | ||
545 | static struct nfs4_client * | |
546 | find_confirmed_client(clientid_t *clid) | |
547 | { | |
548 | struct nfs4_client *clp; | |
549 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
550 | ||
551 | list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 552 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
553 | return clp; |
554 | } | |
555 | return NULL; | |
556 | } | |
557 | ||
558 | static struct nfs4_client * | |
559 | find_unconfirmed_client(clientid_t *clid) | |
560 | { | |
561 | struct nfs4_client *clp; | |
562 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
563 | ||
564 | list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 565 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
566 | return clp; |
567 | } | |
568 | return NULL; | |
569 | } | |
570 | ||
28ce6054 N |
571 | static struct nfs4_client * |
572 | find_confirmed_client_by_str(const char *dname, unsigned int hashval) | |
573 | { | |
574 | struct nfs4_client *clp; | |
575 | ||
576 | list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { | |
577 | if (same_name(clp->cl_recdir, dname)) | |
578 | return clp; | |
579 | } | |
580 | return NULL; | |
581 | } | |
582 | ||
583 | static struct nfs4_client * | |
584 | find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) | |
585 | { | |
586 | struct nfs4_client *clp; | |
587 | ||
588 | list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { | |
589 | if (same_name(clp->cl_recdir, dname)) | |
590 | return clp; | |
591 | } | |
592 | return NULL; | |
593 | } | |
594 | ||
1da177e4 LT |
595 | /* a helper function for parse_callback */ |
596 | static int | |
597 | parse_octet(unsigned int *lenp, char **addrp) | |
598 | { | |
599 | unsigned int len = *lenp; | |
600 | char *p = *addrp; | |
601 | int n = -1; | |
602 | char c; | |
603 | ||
604 | for (;;) { | |
605 | if (!len) | |
606 | break; | |
607 | len--; | |
608 | c = *p++; | |
609 | if (c == '.') | |
610 | break; | |
611 | if ((c < '0') || (c > '9')) { | |
612 | n = -1; | |
613 | break; | |
614 | } | |
615 | if (n < 0) | |
616 | n = 0; | |
617 | n = (n * 10) + (c - '0'); | |
618 | if (n > 255) { | |
619 | n = -1; | |
620 | break; | |
621 | } | |
622 | } | |
623 | *lenp = len; | |
624 | *addrp = p; | |
625 | return n; | |
626 | } | |
627 | ||
628 | /* parse and set the setclientid ipv4 callback address */ | |
fd39ca9a | 629 | static int |
1da177e4 LT |
630 | parse_ipv4(unsigned int addr_len, char *addr_val, unsigned int *cbaddrp, unsigned short *cbportp) |
631 | { | |
632 | int temp = 0; | |
633 | u32 cbaddr = 0; | |
634 | u16 cbport = 0; | |
635 | u32 addrlen = addr_len; | |
636 | char *addr = addr_val; | |
637 | int i, shift; | |
638 | ||
639 | /* ipaddress */ | |
640 | shift = 24; | |
641 | for(i = 4; i > 0 ; i--) { | |
642 | if ((temp = parse_octet(&addrlen, &addr)) < 0) { | |
643 | return 0; | |
644 | } | |
645 | cbaddr |= (temp << shift); | |
646 | if (shift > 0) | |
647 | shift -= 8; | |
648 | } | |
649 | *cbaddrp = cbaddr; | |
650 | ||
651 | /* port */ | |
652 | shift = 8; | |
653 | for(i = 2; i > 0 ; i--) { | |
654 | if ((temp = parse_octet(&addrlen, &addr)) < 0) { | |
655 | return 0; | |
656 | } | |
657 | cbport |= (temp << shift); | |
658 | if (shift > 0) | |
659 | shift -= 8; | |
660 | } | |
661 | *cbportp = cbport; | |
662 | return 1; | |
663 | } | |
664 | ||
fd39ca9a | 665 | static void |
1da177e4 LT |
666 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se) |
667 | { | |
668 | struct nfs4_callback *cb = &clp->cl_callback; | |
669 | ||
670 | /* Currently, we only support tcp for the callback channel */ | |
671 | if ((se->se_callback_netid_len != 3) || memcmp((char *)se->se_callback_netid_val, "tcp", 3)) | |
672 | goto out_err; | |
673 | ||
674 | if ( !(parse_ipv4(se->se_callback_addr_len, se->se_callback_addr_val, | |
675 | &cb->cb_addr, &cb->cb_port))) | |
676 | goto out_err; | |
677 | cb->cb_prog = se->se_callback_prog; | |
678 | cb->cb_ident = se->se_callback_ident; | |
1da177e4 LT |
679 | return; |
680 | out_err: | |
849823c5 | 681 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
682 | "will not receive delegations\n", |
683 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
684 | ||
1da177e4 LT |
685 | return; |
686 | } | |
687 | ||
b37ad28b | 688 | __be32 |
b591480b BF |
689 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
690 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 691 | { |
27459f09 | 692 | struct sockaddr_in *sin = svc_addr_in(rqstp); |
1da177e4 LT |
693 | struct xdr_netobj clname = { |
694 | .len = setclid->se_namelen, | |
695 | .data = setclid->se_name, | |
696 | }; | |
697 | nfs4_verifier clverifier = setclid->se_verf; | |
698 | unsigned int strhashval; | |
28ce6054 | 699 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 700 | __be32 status; |
68e76ad0 | 701 | char *princ; |
a55370a3 | 702 | char dname[HEXDIR_LEN]; |
1da177e4 | 703 | |
1da177e4 | 704 | if (!check_name(clname)) |
73aea4ec | 705 | return nfserr_inval; |
1da177e4 | 706 | |
a55370a3 N |
707 | status = nfs4_make_rec_clidname(dname, &clname); |
708 | if (status) | |
73aea4ec | 709 | return status; |
a55370a3 | 710 | |
1da177e4 LT |
711 | /* |
712 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
713 | * We get here on a DRC miss. | |
714 | */ | |
715 | ||
a55370a3 | 716 | strhashval = clientstr_hashval(dname); |
1da177e4 | 717 | |
1da177e4 | 718 | nfs4_lock_state(); |
28ce6054 N |
719 | conf = find_confirmed_client_by_str(dname, strhashval); |
720 | if (conf) { | |
a186e767 | 721 | /* RFC 3530 14.2.33 CASE 0: */ |
1da177e4 | 722 | status = nfserr_clid_inuse; |
599e0a22 | 723 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred) |
27459f09 | 724 | || conf->cl_addr != sin->sin_addr.s_addr) { |
be859405 HH |
725 | dprintk("NFSD: setclientid: string in use by clientat %pI4\n", |
726 | &conf->cl_addr); | |
1da177e4 LT |
727 | goto out; |
728 | } | |
1da177e4 | 729 | } |
a186e767 BF |
730 | /* |
731 | * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") | |
732 | * has a description of SETCLIENTID request processing consisting | |
733 | * of 5 bullet points, labeled as CASE0 - CASE4 below. | |
734 | */ | |
28ce6054 | 735 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
1da177e4 LT |
736 | status = nfserr_resource; |
737 | if (!conf) { | |
a186e767 BF |
738 | /* |
739 | * RFC 3530 14.2.33 CASE 4: | |
740 | * placed first, because it is the normal case | |
1da177e4 LT |
741 | */ |
742 | if (unconf) | |
743 | expire_client(unconf); | |
a55370a3 N |
744 | new = create_client(clname, dname); |
745 | if (new == NULL) | |
1da177e4 | 746 | goto out; |
1da177e4 | 747 | gen_clid(new); |
599e0a22 | 748 | } else if (same_verf(&conf->cl_verifier, &clverifier)) { |
1da177e4 | 749 | /* |
a186e767 BF |
750 | * RFC 3530 14.2.33 CASE 1: |
751 | * probable callback update | |
1da177e4 | 752 | */ |
31f4a6c1 N |
753 | if (unconf) { |
754 | /* Note this is removing unconfirmed {*x***}, | |
755 | * which is stronger than RFC recommended {vxc**}. | |
756 | * This has the advantage that there is at most | |
757 | * one {*x***} in either list at any time. | |
758 | */ | |
759 | expire_client(unconf); | |
1da177e4 | 760 | } |
a55370a3 N |
761 | new = create_client(clname, dname); |
762 | if (new == NULL) | |
1da177e4 | 763 | goto out; |
1da177e4 | 764 | copy_clid(new, conf); |
1da177e4 LT |
765 | } else if (!unconf) { |
766 | /* | |
a186e767 BF |
767 | * RFC 3530 14.2.33 CASE 2: |
768 | * probable client reboot; state will be removed if | |
769 | * confirmed. | |
1da177e4 | 770 | */ |
a55370a3 N |
771 | new = create_client(clname, dname); |
772 | if (new == NULL) | |
1da177e4 | 773 | goto out; |
1da177e4 | 774 | gen_clid(new); |
49ba8781 | 775 | } else { |
a186e767 BF |
776 | /* |
777 | * RFC 3530 14.2.33 CASE 3: | |
778 | * probable client reboot; state will be removed if | |
779 | * confirmed. | |
1da177e4 LT |
780 | */ |
781 | expire_client(unconf); | |
a55370a3 N |
782 | new = create_client(clname, dname); |
783 | if (new == NULL) | |
1da177e4 | 784 | goto out; |
1da177e4 | 785 | gen_clid(new); |
1da177e4 | 786 | } |
c175b83c BF |
787 | copy_verf(new, &clverifier); |
788 | new->cl_addr = sin->sin_addr.s_addr; | |
61054b14 | 789 | new->cl_flavor = rqstp->rq_flavor; |
68e76ad0 OK |
790 | princ = svc_gss_principal(rqstp); |
791 | if (princ) { | |
792 | new->cl_principal = kstrdup(princ, GFP_KERNEL); | |
793 | if (new->cl_principal == NULL) { | |
794 | free_client(new); | |
795 | goto out; | |
796 | } | |
797 | } | |
c175b83c BF |
798 | copy_cred(&new->cl_cred, &rqstp->rq_cred); |
799 | gen_confirm(new); | |
800 | gen_callback(new, setclid); | |
801 | add_to_unconfirmed(new, strhashval); | |
1da177e4 LT |
802 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
803 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
804 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
805 | status = nfs_ok; | |
806 | out: | |
807 | nfs4_unlock_state(); | |
808 | return status; | |
809 | } | |
810 | ||
811 | ||
812 | /* | |
a186e767 BF |
813 | * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has |
814 | * a description of SETCLIENTID_CONFIRM request processing consisting of 4 | |
815 | * bullets, labeled as CASE1 - CASE4 below. | |
1da177e4 | 816 | */ |
b37ad28b | 817 | __be32 |
b591480b BF |
818 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
819 | struct nfsd4_compound_state *cstate, | |
820 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 821 | { |
27459f09 | 822 | struct sockaddr_in *sin = svc_addr_in(rqstp); |
21ab45a4 | 823 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
824 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
825 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 826 | __be32 status; |
1da177e4 LT |
827 | |
828 | if (STALE_CLIENTID(clid)) | |
829 | return nfserr_stale_clientid; | |
830 | /* | |
831 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
832 | * We get here on a DRC miss. | |
833 | */ | |
834 | ||
835 | nfs4_lock_state(); | |
21ab45a4 N |
836 | |
837 | conf = find_confirmed_client(clid); | |
838 | unconf = find_unconfirmed_client(clid); | |
839 | ||
840 | status = nfserr_clid_inuse; | |
27459f09 | 841 | if (conf && conf->cl_addr != sin->sin_addr.s_addr) |
21ab45a4 | 842 | goto out; |
27459f09 | 843 | if (unconf && unconf->cl_addr != sin->sin_addr.s_addr) |
21ab45a4 N |
844 | goto out; |
845 | ||
a186e767 BF |
846 | /* |
847 | * section 14.2.34 of RFC 3530 has a description of | |
848 | * SETCLIENTID_CONFIRM request processing consisting | |
849 | * of 4 bullet points, labeled as CASE1 - CASE4 below. | |
850 | */ | |
366e0c1d | 851 | if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { |
a186e767 BF |
852 | /* |
853 | * RFC 3530 14.2.34 CASE 1: | |
854 | * callback update | |
855 | */ | |
599e0a22 | 856 | if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) |
1da177e4 LT |
857 | status = nfserr_clid_inuse; |
858 | else { | |
1a69c179 N |
859 | /* XXX: We just turn off callbacks until we can handle |
860 | * change request correctly. */ | |
cb36d634 | 861 | atomic_set(&conf->cl_callback.cb_set, 0); |
21ab45a4 | 862 | gen_confirm(conf); |
46309029 | 863 | nfsd4_remove_clid_dir(unconf); |
1a69c179 | 864 | expire_client(unconf); |
1da177e4 | 865 | status = nfs_ok; |
1a69c179 | 866 | |
1da177e4 | 867 | } |
f3aba4e5 | 868 | } else if (conf && !unconf) { |
a186e767 BF |
869 | /* |
870 | * RFC 3530 14.2.34 CASE 2: | |
871 | * probable retransmitted request; play it safe and | |
872 | * do nothing. | |
7c79f737 | 873 | */ |
599e0a22 | 874 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) |
1da177e4 | 875 | status = nfserr_clid_inuse; |
21ab45a4 | 876 | else |
1da177e4 | 877 | status = nfs_ok; |
7c79f737 | 878 | } else if (!conf && unconf |
599e0a22 | 879 | && same_verf(&unconf->cl_confirm, &confirm)) { |
a186e767 BF |
880 | /* |
881 | * RFC 3530 14.2.34 CASE 3: | |
882 | * Normal case; new or rebooted client: | |
7c79f737 | 883 | */ |
599e0a22 | 884 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { |
1da177e4 LT |
885 | status = nfserr_clid_inuse; |
886 | } else { | |
1a69c179 N |
887 | unsigned int hash = |
888 | clientstr_hashval(unconf->cl_recdir); | |
889 | conf = find_confirmed_client_by_str(unconf->cl_recdir, | |
890 | hash); | |
891 | if (conf) { | |
c7b9a459 | 892 | nfsd4_remove_clid_dir(conf); |
1a69c179 N |
893 | expire_client(conf); |
894 | } | |
1da177e4 | 895 | move_to_confirmed(unconf); |
21ab45a4 | 896 | conf = unconf; |
46f8a64b | 897 | nfsd4_probe_callback(conf); |
1a69c179 | 898 | status = nfs_ok; |
1da177e4 | 899 | } |
599e0a22 BF |
900 | } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) |
901 | && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, | |
7c79f737 | 902 | &confirm)))) { |
a186e767 BF |
903 | /* |
904 | * RFC 3530 14.2.34 CASE 4: | |
905 | * Client probably hasn't noticed that we rebooted yet. | |
7c79f737 | 906 | */ |
1da177e4 | 907 | status = nfserr_stale_clientid; |
7c79f737 | 908 | } else { |
08e8987c N |
909 | /* check that we have hit one of the cases...*/ |
910 | status = nfserr_clid_inuse; | |
911 | } | |
1da177e4 | 912 | out: |
1da177e4 LT |
913 | nfs4_unlock_state(); |
914 | return status; | |
915 | } | |
916 | ||
1da177e4 LT |
917 | /* OPEN Share state helper functions */ |
918 | static inline struct nfs4_file * | |
919 | alloc_init_file(struct inode *ino) | |
920 | { | |
921 | struct nfs4_file *fp; | |
922 | unsigned int hashval = file_hashval(ino); | |
923 | ||
e60d4398 N |
924 | fp = kmem_cache_alloc(file_slab, GFP_KERNEL); |
925 | if (fp) { | |
13cd2184 | 926 | kref_init(&fp->fi_ref); |
1da177e4 | 927 | INIT_LIST_HEAD(&fp->fi_hash); |
8beefa24 N |
928 | INIT_LIST_HEAD(&fp->fi_stateids); |
929 | INIT_LIST_HEAD(&fp->fi_delegations); | |
1da177e4 LT |
930 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); |
931 | fp->fi_inode = igrab(ino); | |
932 | fp->fi_id = current_fileid++; | |
47f9940c | 933 | fp->fi_had_conflict = false; |
1da177e4 LT |
934 | return fp; |
935 | } | |
936 | return NULL; | |
937 | } | |
938 | ||
e60d4398 | 939 | static void |
e18b890b | 940 | nfsd4_free_slab(struct kmem_cache **slab) |
1da177e4 | 941 | { |
e60d4398 N |
942 | if (*slab == NULL) |
943 | return; | |
1a1d92c1 | 944 | kmem_cache_destroy(*slab); |
e60d4398 | 945 | *slab = NULL; |
1da177e4 LT |
946 | } |
947 | ||
e8ff2a84 | 948 | void |
1da177e4 LT |
949 | nfsd4_free_slabs(void) |
950 | { | |
e60d4398 N |
951 | nfsd4_free_slab(&stateowner_slab); |
952 | nfsd4_free_slab(&file_slab); | |
5ac049ac | 953 | nfsd4_free_slab(&stateid_slab); |
5b2d21c1 | 954 | nfsd4_free_slab(&deleg_slab); |
e60d4398 | 955 | } |
1da177e4 | 956 | |
e60d4398 N |
957 | static int |
958 | nfsd4_init_slabs(void) | |
959 | { | |
960 | stateowner_slab = kmem_cache_create("nfsd4_stateowners", | |
20c2df83 | 961 | sizeof(struct nfs4_stateowner), 0, 0, NULL); |
e60d4398 N |
962 | if (stateowner_slab == NULL) |
963 | goto out_nomem; | |
964 | file_slab = kmem_cache_create("nfsd4_files", | |
20c2df83 | 965 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 N |
966 | if (file_slab == NULL) |
967 | goto out_nomem; | |
5ac049ac | 968 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
20c2df83 | 969 | sizeof(struct nfs4_stateid), 0, 0, NULL); |
5ac049ac N |
970 | if (stateid_slab == NULL) |
971 | goto out_nomem; | |
5b2d21c1 | 972 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 973 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 N |
974 | if (deleg_slab == NULL) |
975 | goto out_nomem; | |
e60d4398 N |
976 | return 0; |
977 | out_nomem: | |
978 | nfsd4_free_slabs(); | |
979 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | |
980 | return -ENOMEM; | |
1da177e4 LT |
981 | } |
982 | ||
983 | void | |
984 | nfs4_free_stateowner(struct kref *kref) | |
985 | { | |
986 | struct nfs4_stateowner *sop = | |
987 | container_of(kref, struct nfs4_stateowner, so_ref); | |
988 | kfree(sop->so_owner.data); | |
989 | kmem_cache_free(stateowner_slab, sop); | |
990 | } | |
991 | ||
992 | static inline struct nfs4_stateowner * | |
993 | alloc_stateowner(struct xdr_netobj *owner) | |
994 | { | |
995 | struct nfs4_stateowner *sop; | |
996 | ||
997 | if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) { | |
998 | if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) { | |
999 | memcpy(sop->so_owner.data, owner->data, owner->len); | |
1000 | sop->so_owner.len = owner->len; | |
1001 | kref_init(&sop->so_ref); | |
1002 | return sop; | |
1003 | } | |
1004 | kmem_cache_free(stateowner_slab, sop); | |
1005 | } | |
1006 | return NULL; | |
1007 | } | |
1008 | ||
1009 | static struct nfs4_stateowner * | |
1010 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { | |
1011 | struct nfs4_stateowner *sop; | |
1012 | struct nfs4_replay *rp; | |
1013 | unsigned int idhashval; | |
1014 | ||
1015 | if (!(sop = alloc_stateowner(&open->op_owner))) | |
1016 | return NULL; | |
1017 | idhashval = ownerid_hashval(current_ownerid); | |
1018 | INIT_LIST_HEAD(&sop->so_idhash); | |
1019 | INIT_LIST_HEAD(&sop->so_strhash); | |
1020 | INIT_LIST_HEAD(&sop->so_perclient); | |
ea1da636 N |
1021 | INIT_LIST_HEAD(&sop->so_stateids); |
1022 | INIT_LIST_HEAD(&sop->so_perstateid); /* not used */ | |
1da177e4 LT |
1023 | INIT_LIST_HEAD(&sop->so_close_lru); |
1024 | sop->so_time = 0; | |
1025 | list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]); | |
1026 | list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]); | |
ea1da636 | 1027 | list_add(&sop->so_perclient, &clp->cl_openowners); |
1da177e4 LT |
1028 | sop->so_is_open_owner = 1; |
1029 | sop->so_id = current_ownerid++; | |
1030 | sop->so_client = clp; | |
1031 | sop->so_seqid = open->op_seqid; | |
1032 | sop->so_confirmed = 0; | |
1033 | rp = &sop->so_replay; | |
de1ae286 | 1034 | rp->rp_status = nfserr_serverfault; |
1da177e4 LT |
1035 | rp->rp_buflen = 0; |
1036 | rp->rp_buf = rp->rp_ibuf; | |
1037 | return sop; | |
1038 | } | |
1039 | ||
1040 | static void | |
1041 | release_stateid_lockowners(struct nfs4_stateid *open_stp) | |
1042 | { | |
1043 | struct nfs4_stateowner *lock_sop; | |
1044 | ||
ea1da636 N |
1045 | while (!list_empty(&open_stp->st_lockowners)) { |
1046 | lock_sop = list_entry(open_stp->st_lockowners.next, | |
1047 | struct nfs4_stateowner, so_perstateid); | |
1048 | /* list_del(&open_stp->st_lockowners); */ | |
1da177e4 LT |
1049 | BUG_ON(lock_sop->so_is_open_owner); |
1050 | release_stateowner(lock_sop); | |
1051 | } | |
1052 | } | |
1053 | ||
1054 | static void | |
1055 | unhash_stateowner(struct nfs4_stateowner *sop) | |
1056 | { | |
1057 | struct nfs4_stateid *stp; | |
1058 | ||
1059 | list_del(&sop->so_idhash); | |
1060 | list_del(&sop->so_strhash); | |
6fa305de | 1061 | if (sop->so_is_open_owner) |
1da177e4 | 1062 | list_del(&sop->so_perclient); |
ea1da636 N |
1063 | list_del(&sop->so_perstateid); |
1064 | while (!list_empty(&sop->so_stateids)) { | |
1065 | stp = list_entry(sop->so_stateids.next, | |
1066 | struct nfs4_stateid, st_perstateowner); | |
1da177e4 LT |
1067 | if (sop->so_is_open_owner) |
1068 | release_stateid(stp, OPEN_STATE); | |
1069 | else | |
1070 | release_stateid(stp, LOCK_STATE); | |
1071 | } | |
1072 | } | |
1073 | ||
1074 | static void | |
1075 | release_stateowner(struct nfs4_stateowner *sop) | |
1076 | { | |
1077 | unhash_stateowner(sop); | |
1078 | list_del(&sop->so_close_lru); | |
1079 | nfs4_put_stateowner(sop); | |
1080 | } | |
1081 | ||
1082 | static inline void | |
1083 | init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { | |
1084 | struct nfs4_stateowner *sop = open->op_stateowner; | |
1085 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); | |
1086 | ||
1087 | INIT_LIST_HEAD(&stp->st_hash); | |
ea1da636 N |
1088 | INIT_LIST_HEAD(&stp->st_perstateowner); |
1089 | INIT_LIST_HEAD(&stp->st_lockowners); | |
1da177e4 LT |
1090 | INIT_LIST_HEAD(&stp->st_perfile); |
1091 | list_add(&stp->st_hash, &stateid_hashtbl[hashval]); | |
ea1da636 | 1092 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
8beefa24 | 1093 | list_add(&stp->st_perfile, &fp->fi_stateids); |
1da177e4 | 1094 | stp->st_stateowner = sop; |
13cd2184 | 1095 | get_nfs4_file(fp); |
1da177e4 LT |
1096 | stp->st_file = fp; |
1097 | stp->st_stateid.si_boot = boot_time; | |
1098 | stp->st_stateid.si_stateownerid = sop->so_id; | |
1099 | stp->st_stateid.si_fileid = fp->fi_id; | |
1100 | stp->st_stateid.si_generation = 0; | |
1101 | stp->st_access_bmap = 0; | |
1102 | stp->st_deny_bmap = 0; | |
1103 | __set_bit(open->op_share_access, &stp->st_access_bmap); | |
1104 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); | |
4c4cd222 | 1105 | stp->st_openstp = NULL; |
1da177e4 LT |
1106 | } |
1107 | ||
1108 | static void | |
1109 | release_stateid(struct nfs4_stateid *stp, int flags) | |
1110 | { | |
1111 | struct file *filp = stp->st_vfs_file; | |
1112 | ||
1113 | list_del(&stp->st_hash); | |
1da177e4 | 1114 | list_del(&stp->st_perfile); |
ea1da636 | 1115 | list_del(&stp->st_perstateowner); |
1da177e4 LT |
1116 | if (flags & OPEN_STATE) { |
1117 | release_stateid_lockowners(stp); | |
1118 | stp->st_vfs_file = NULL; | |
1119 | nfsd_close(filp); | |
1da177e4 LT |
1120 | } else if (flags & LOCK_STATE) |
1121 | locks_remove_posix(filp, (fl_owner_t) stp->st_stateowner); | |
13cd2184 | 1122 | put_nfs4_file(stp->st_file); |
5ac049ac | 1123 | kmem_cache_free(stateid_slab, stp); |
1da177e4 LT |
1124 | } |
1125 | ||
fd39ca9a | 1126 | static void |
1da177e4 LT |
1127 | move_to_close_lru(struct nfs4_stateowner *sop) |
1128 | { | |
1129 | dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); | |
1130 | ||
358dd55a | 1131 | list_move_tail(&sop->so_close_lru, &close_lru); |
1da177e4 LT |
1132 | sop->so_time = get_seconds(); |
1133 | } | |
1134 | ||
1da177e4 | 1135 | static int |
599e0a22 BF |
1136 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
1137 | clientid_t *clid) | |
1138 | { | |
1139 | return (sop->so_owner.len == owner->len) && | |
1140 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
1141 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
1142 | } |
1143 | ||
1144 | static struct nfs4_stateowner * | |
1145 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) | |
1146 | { | |
1147 | struct nfs4_stateowner *so = NULL; | |
1148 | ||
1149 | list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { | |
599e0a22 | 1150 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) |
1da177e4 LT |
1151 | return so; |
1152 | } | |
1153 | return NULL; | |
1154 | } | |
1155 | ||
1156 | /* search file_hashtbl[] for file */ | |
1157 | static struct nfs4_file * | |
1158 | find_file(struct inode *ino) | |
1159 | { | |
1160 | unsigned int hashval = file_hashval(ino); | |
1161 | struct nfs4_file *fp; | |
1162 | ||
1163 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { | |
13cd2184 N |
1164 | if (fp->fi_inode == ino) { |
1165 | get_nfs4_file(fp); | |
1da177e4 | 1166 | return fp; |
13cd2184 | 1167 | } |
1da177e4 LT |
1168 | } |
1169 | return NULL; | |
1170 | } | |
1171 | ||
8838dc43 | 1172 | static inline int access_valid(u32 x) |
ba5a6a19 | 1173 | { |
8838dc43 BF |
1174 | if (x < NFS4_SHARE_ACCESS_READ) |
1175 | return 0; | |
1176 | if (x > NFS4_SHARE_ACCESS_BOTH) | |
1177 | return 0; | |
1178 | return 1; | |
ba5a6a19 BF |
1179 | } |
1180 | ||
8838dc43 | 1181 | static inline int deny_valid(u32 x) |
ba5a6a19 | 1182 | { |
8838dc43 BF |
1183 | /* Note: unlike access bits, deny bits may be zero. */ |
1184 | return x <= NFS4_SHARE_DENY_BOTH; | |
ba5a6a19 | 1185 | } |
1da177e4 | 1186 | |
4f83aa30 BF |
1187 | /* |
1188 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
1189 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
1190 | * only what share bits are currently in force, but also what | |
1191 | * combinations of share bits previous opens have used. This allows us | |
1192 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
1193 | * return an error if the client attempt to downgrade to a combination | |
1194 | * of share bits not explicable by closing some of its previous opens. | |
1195 | * | |
1196 | * XXX: This enforcement is actually incomplete, since we don't keep | |
1197 | * track of access/deny bit combinations; so, e.g., we allow: | |
1198 | * | |
1199 | * OPEN allow read, deny write | |
1200 | * OPEN allow both, deny none | |
1201 | * DOWNGRADE allow read, deny none | |
1202 | * | |
1203 | * which we should reject. | |
1204 | */ | |
fd39ca9a | 1205 | static void |
1da177e4 LT |
1206 | set_access(unsigned int *access, unsigned long bmap) { |
1207 | int i; | |
1208 | ||
1209 | *access = 0; | |
1210 | for (i = 1; i < 4; i++) { | |
1211 | if (test_bit(i, &bmap)) | |
1212 | *access |= i; | |
1213 | } | |
1214 | } | |
1215 | ||
fd39ca9a | 1216 | static void |
1da177e4 LT |
1217 | set_deny(unsigned int *deny, unsigned long bmap) { |
1218 | int i; | |
1219 | ||
1220 | *deny = 0; | |
1221 | for (i = 0; i < 4; i++) { | |
1222 | if (test_bit(i, &bmap)) | |
1223 | *deny |= i ; | |
1224 | } | |
1225 | } | |
1226 | ||
1227 | static int | |
1228 | test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { | |
1229 | unsigned int access, deny; | |
1230 | ||
1231 | set_access(&access, stp->st_access_bmap); | |
1232 | set_deny(&deny, stp->st_deny_bmap); | |
1233 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) | |
1234 | return 0; | |
1235 | return 1; | |
1236 | } | |
1237 | ||
1238 | /* | |
1239 | * Called to check deny when READ with all zero stateid or | |
1240 | * WRITE with all zero or all one stateid | |
1241 | */ | |
b37ad28b | 1242 | static __be32 |
1da177e4 LT |
1243 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
1244 | { | |
1245 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
1246 | struct nfs4_file *fp; | |
1247 | struct nfs4_stateid *stp; | |
b37ad28b | 1248 | __be32 ret; |
1da177e4 LT |
1249 | |
1250 | dprintk("NFSD: nfs4_share_conflict\n"); | |
1251 | ||
1252 | fp = find_file(ino); | |
13cd2184 N |
1253 | if (!fp) |
1254 | return nfs_ok; | |
b700949b | 1255 | ret = nfserr_locked; |
1da177e4 | 1256 | /* Search for conflicting share reservations */ |
13cd2184 N |
1257 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
1258 | if (test_bit(deny_type, &stp->st_deny_bmap) || | |
1259 | test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) | |
1260 | goto out; | |
1da177e4 | 1261 | } |
13cd2184 N |
1262 | ret = nfs_ok; |
1263 | out: | |
1264 | put_nfs4_file(fp); | |
1265 | return ret; | |
1da177e4 LT |
1266 | } |
1267 | ||
1268 | static inline void | |
1269 | nfs4_file_downgrade(struct file *filp, unsigned int share_access) | |
1270 | { | |
1271 | if (share_access & NFS4_SHARE_ACCESS_WRITE) { | |
aceaf78d | 1272 | drop_file_write_access(filp); |
1da177e4 LT |
1273 | filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE; |
1274 | } | |
1275 | } | |
1276 | ||
1277 | /* | |
1278 | * Recall a delegation | |
1279 | */ | |
1280 | static int | |
1281 | do_recall(void *__dp) | |
1282 | { | |
1283 | struct nfs4_delegation *dp = __dp; | |
1284 | ||
47f9940c | 1285 | dp->dl_file->fi_had_conflict = true; |
1da177e4 LT |
1286 | nfsd4_cb_recall(dp); |
1287 | return 0; | |
1288 | } | |
1289 | ||
1290 | /* | |
1291 | * Spawn a thread to perform a recall on the delegation represented | |
1292 | * by the lease (file_lock) | |
1293 | * | |
1294 | * Called from break_lease() with lock_kernel() held. | |
1295 | * Note: we assume break_lease will only call this *once* for any given | |
1296 | * lease. | |
1297 | */ | |
1298 | static | |
1299 | void nfsd_break_deleg_cb(struct file_lock *fl) | |
1300 | { | |
1301 | struct nfs4_delegation *dp= (struct nfs4_delegation *)fl->fl_owner; | |
1302 | struct task_struct *t; | |
1303 | ||
1304 | dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl); | |
1305 | if (!dp) | |
1306 | return; | |
1307 | ||
1308 | /* We're assuming the state code never drops its reference | |
1309 | * without first removing the lease. Since we're in this lease | |
1310 | * callback (and since the lease code is serialized by the kernel | |
1311 | * lock) we know the server hasn't removed the lease yet, we know | |
1312 | * it's safe to take a reference: */ | |
1313 | atomic_inc(&dp->dl_count); | |
cfdcad4d | 1314 | atomic_inc(&dp->dl_client->cl_count); |
1da177e4 LT |
1315 | |
1316 | spin_lock(&recall_lock); | |
1317 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); | |
1318 | spin_unlock(&recall_lock); | |
1319 | ||
1320 | /* only place dl_time is set. protected by lock_kernel*/ | |
1321 | dp->dl_time = get_seconds(); | |
1322 | ||
0272e1fd BF |
1323 | /* |
1324 | * We don't want the locks code to timeout the lease for us; | |
1325 | * we'll remove it ourself if the delegation isn't returned | |
1326 | * in time. | |
1327 | */ | |
1328 | fl->fl_break_time = 0; | |
1da177e4 LT |
1329 | |
1330 | t = kthread_run(do_recall, dp, "%s", "nfs4_cb_recall"); | |
1331 | if (IS_ERR(t)) { | |
1332 | struct nfs4_client *clp = dp->dl_client; | |
1333 | ||
1334 | printk(KERN_INFO "NFSD: Callback thread failed for " | |
1335 | "for client (clientid %08x/%08x)\n", | |
1336 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
cfdcad4d | 1337 | put_nfs4_client(dp->dl_client); |
1da177e4 LT |
1338 | nfs4_put_delegation(dp); |
1339 | } | |
1340 | } | |
1341 | ||
1342 | /* | |
1343 | * The file_lock is being reapd. | |
1344 | * | |
1345 | * Called by locks_free_lock() with lock_kernel() held. | |
1346 | */ | |
1347 | static | |
1348 | void nfsd_release_deleg_cb(struct file_lock *fl) | |
1349 | { | |
1350 | struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; | |
1351 | ||
1352 | dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count)); | |
1353 | ||
1354 | if (!(fl->fl_flags & FL_LEASE) || !dp) | |
1355 | return; | |
1356 | dp->dl_flock = NULL; | |
1357 | } | |
1358 | ||
1359 | /* | |
1360 | * Set the delegation file_lock back pointer. | |
1361 | * | |
a9933cea | 1362 | * Called from setlease() with lock_kernel() held. |
1da177e4 LT |
1363 | */ |
1364 | static | |
1365 | void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl) | |
1366 | { | |
1367 | struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner; | |
1368 | ||
1369 | dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp); | |
1370 | if (!dp) | |
1371 | return; | |
1372 | dp->dl_flock = new; | |
1373 | } | |
1374 | ||
1375 | /* | |
a9933cea | 1376 | * Called from setlease() with lock_kernel() held |
1da177e4 LT |
1377 | */ |
1378 | static | |
1379 | int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try) | |
1380 | { | |
1381 | struct nfs4_delegation *onlistd = | |
1382 | (struct nfs4_delegation *)onlist->fl_owner; | |
1383 | struct nfs4_delegation *tryd = | |
1384 | (struct nfs4_delegation *)try->fl_owner; | |
1385 | ||
1386 | if (onlist->fl_lmops != try->fl_lmops) | |
1387 | return 0; | |
1388 | ||
1389 | return onlistd->dl_client == tryd->dl_client; | |
1390 | } | |
1391 | ||
1392 | ||
1393 | static | |
1394 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
1395 | { | |
1396 | if (arg & F_UNLCK) | |
1397 | return lease_modify(onlist, arg); | |
1398 | else | |
1399 | return -EAGAIN; | |
1400 | } | |
1401 | ||
fd39ca9a | 1402 | static struct lock_manager_operations nfsd_lease_mng_ops = { |
1da177e4 LT |
1403 | .fl_break = nfsd_break_deleg_cb, |
1404 | .fl_release_private = nfsd_release_deleg_cb, | |
1405 | .fl_copy_lock = nfsd_copy_lock_deleg_cb, | |
1406 | .fl_mylease = nfsd_same_client_deleg_cb, | |
1407 | .fl_change = nfsd_change_deleg_cb, | |
1408 | }; | |
1409 | ||
1410 | ||
b37ad28b | 1411 | __be32 |
1da177e4 LT |
1412 | nfsd4_process_open1(struct nfsd4_open *open) |
1413 | { | |
1da177e4 LT |
1414 | clientid_t *clientid = &open->op_clientid; |
1415 | struct nfs4_client *clp = NULL; | |
1416 | unsigned int strhashval; | |
1417 | struct nfs4_stateowner *sop = NULL; | |
1418 | ||
1da177e4 | 1419 | if (!check_name(open->op_owner)) |
0f442aa2 | 1420 | return nfserr_inval; |
1da177e4 LT |
1421 | |
1422 | if (STALE_CLIENTID(&open->op_clientid)) | |
1423 | return nfserr_stale_clientid; | |
1424 | ||
1425 | strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner); | |
1426 | sop = find_openstateowner_str(strhashval, open); | |
0f442aa2 BF |
1427 | open->op_stateowner = sop; |
1428 | if (!sop) { | |
1429 | /* Make sure the client's lease hasn't expired. */ | |
1da177e4 LT |
1430 | clp = find_confirmed_client(clientid); |
1431 | if (clp == NULL) | |
0f442aa2 BF |
1432 | return nfserr_expired; |
1433 | goto renew; | |
1da177e4 | 1434 | } |
0f442aa2 BF |
1435 | if (!sop->so_confirmed) { |
1436 | /* Replace unconfirmed owners without checking for replay. */ | |
1437 | clp = sop->so_client; | |
1438 | release_stateowner(sop); | |
1439 | open->op_stateowner = NULL; | |
1440 | goto renew; | |
1441 | } | |
1442 | if (open->op_seqid == sop->so_seqid - 1) { | |
1443 | if (sop->so_replay.rp_buflen) | |
a90b061c | 1444 | return nfserr_replay_me; |
0f442aa2 BF |
1445 | /* The original OPEN failed so spectacularly |
1446 | * that we don't even have replay data saved! | |
1447 | * Therefore, we have no choice but to continue | |
1448 | * processing this OPEN; presumably, we'll | |
1449 | * fail again for the same reason. | |
1450 | */ | |
1451 | dprintk("nfsd4_process_open1: replay with no replay cache\n"); | |
1452 | goto renew; | |
1453 | } | |
1454 | if (open->op_seqid != sop->so_seqid) | |
1455 | return nfserr_bad_seqid; | |
1da177e4 | 1456 | renew: |
0f442aa2 BF |
1457 | if (open->op_stateowner == NULL) { |
1458 | sop = alloc_init_open_stateowner(strhashval, clp, open); | |
1459 | if (sop == NULL) | |
1460 | return nfserr_resource; | |
1461 | open->op_stateowner = sop; | |
1462 | } | |
1463 | list_del_init(&sop->so_close_lru); | |
1da177e4 | 1464 | renew_client(sop->so_client); |
0f442aa2 | 1465 | return nfs_ok; |
1da177e4 LT |
1466 | } |
1467 | ||
b37ad28b | 1468 | static inline __be32 |
4a6e43e6 N |
1469 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
1470 | { | |
1471 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
1472 | return nfserr_openmode; | |
1473 | else | |
1474 | return nfs_ok; | |
1475 | } | |
1476 | ||
52f4fb43 N |
1477 | static struct nfs4_delegation * |
1478 | find_delegation_file(struct nfs4_file *fp, stateid_t *stid) | |
1479 | { | |
1480 | struct nfs4_delegation *dp; | |
1481 | ||
ea1da636 | 1482 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) { |
52f4fb43 N |
1483 | if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) |
1484 | return dp; | |
1485 | } | |
1486 | return NULL; | |
1487 | } | |
1488 | ||
b37ad28b | 1489 | static __be32 |
567d9829 N |
1490 | nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, |
1491 | struct nfs4_delegation **dp) | |
1492 | { | |
1493 | int flags; | |
b37ad28b | 1494 | __be32 status = nfserr_bad_stateid; |
567d9829 N |
1495 | |
1496 | *dp = find_delegation_file(fp, &open->op_delegate_stateid); | |
1497 | if (*dp == NULL) | |
c44c5eeb | 1498 | goto out; |
567d9829 N |
1499 | flags = open->op_share_access == NFS4_SHARE_ACCESS_READ ? |
1500 | RD_STATE : WR_STATE; | |
1501 | status = nfs4_check_delegmode(*dp, flags); | |
1502 | if (status) | |
1503 | *dp = NULL; | |
c44c5eeb N |
1504 | out: |
1505 | if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
1506 | return nfs_ok; | |
1507 | if (status) | |
1508 | return status; | |
1509 | open->op_stateowner->so_confirmed = 1; | |
1510 | return nfs_ok; | |
567d9829 N |
1511 | } |
1512 | ||
b37ad28b | 1513 | static __be32 |
1da177e4 LT |
1514 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) |
1515 | { | |
1516 | struct nfs4_stateid *local; | |
b37ad28b | 1517 | __be32 status = nfserr_share_denied; |
1da177e4 LT |
1518 | struct nfs4_stateowner *sop = open->op_stateowner; |
1519 | ||
8beefa24 | 1520 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
1521 | /* ignore lock owners */ |
1522 | if (local->st_stateowner->so_is_open_owner == 0) | |
1523 | continue; | |
1524 | /* remember if we have seen this open owner */ | |
1525 | if (local->st_stateowner == sop) | |
1526 | *stpp = local; | |
1527 | /* check for conflicting share reservations */ | |
1528 | if (!test_share(local, open)) | |
1529 | goto out; | |
1530 | } | |
1531 | status = 0; | |
1532 | out: | |
1533 | return status; | |
1534 | } | |
1535 | ||
5ac049ac N |
1536 | static inline struct nfs4_stateid * |
1537 | nfs4_alloc_stateid(void) | |
1538 | { | |
1539 | return kmem_cache_alloc(stateid_slab, GFP_KERNEL); | |
1540 | } | |
1541 | ||
b37ad28b | 1542 | static __be32 |
1da177e4 | 1543 | nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, |
567d9829 | 1544 | struct nfs4_delegation *dp, |
1da177e4 LT |
1545 | struct svc_fh *cur_fh, int flags) |
1546 | { | |
1547 | struct nfs4_stateid *stp; | |
1da177e4 | 1548 | |
5ac049ac | 1549 | stp = nfs4_alloc_stateid(); |
1da177e4 LT |
1550 | if (stp == NULL) |
1551 | return nfserr_resource; | |
1552 | ||
567d9829 N |
1553 | if (dp) { |
1554 | get_file(dp->dl_vfs_file); | |
1555 | stp->st_vfs_file = dp->dl_vfs_file; | |
1556 | } else { | |
b37ad28b | 1557 | __be32 status; |
567d9829 N |
1558 | status = nfsd_open(rqstp, cur_fh, S_IFREG, flags, |
1559 | &stp->st_vfs_file); | |
1560 | if (status) { | |
1561 | if (status == nfserr_dropit) | |
1562 | status = nfserr_jukebox; | |
5ac049ac | 1563 | kmem_cache_free(stateid_slab, stp); |
567d9829 N |
1564 | return status; |
1565 | } | |
1da177e4 | 1566 | } |
1da177e4 LT |
1567 | *stpp = stp; |
1568 | return 0; | |
1569 | } | |
1570 | ||
b37ad28b | 1571 | static inline __be32 |
1da177e4 LT |
1572 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
1573 | struct nfsd4_open *open) | |
1574 | { | |
1575 | struct iattr iattr = { | |
1576 | .ia_valid = ATTR_SIZE, | |
1577 | .ia_size = 0, | |
1578 | }; | |
1579 | if (!open->op_truncate) | |
1580 | return 0; | |
1581 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 1582 | return nfserr_inval; |
1da177e4 LT |
1583 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
1584 | } | |
1585 | ||
b37ad28b | 1586 | static __be32 |
1da177e4 LT |
1587 | nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open) |
1588 | { | |
1589 | struct file *filp = stp->st_vfs_file; | |
7eaa36e2 | 1590 | struct inode *inode = filp->f_path.dentry->d_inode; |
6c26d08f | 1591 | unsigned int share_access, new_writer; |
b37ad28b | 1592 | __be32 status; |
1da177e4 LT |
1593 | |
1594 | set_access(&share_access, stp->st_access_bmap); | |
6c26d08f BF |
1595 | new_writer = (~share_access) & open->op_share_access |
1596 | & NFS4_SHARE_ACCESS_WRITE; | |
1da177e4 | 1597 | |
6c26d08f | 1598 | if (new_writer) { |
b37ad28b AV |
1599 | int err = get_write_access(inode); |
1600 | if (err) | |
1601 | return nfserrno(err); | |
e518f056 BH |
1602 | err = mnt_want_write(cur_fh->fh_export->ex_path.mnt); |
1603 | if (err) | |
1604 | return nfserrno(err); | |
1605 | file_take_write(filp); | |
6c26d08f | 1606 | } |
1da177e4 LT |
1607 | status = nfsd4_truncate(rqstp, cur_fh, open); |
1608 | if (status) { | |
6c26d08f BF |
1609 | if (new_writer) |
1610 | put_write_access(inode); | |
1da177e4 LT |
1611 | return status; |
1612 | } | |
1613 | /* remember the open */ | |
6c26d08f | 1614 | filp->f_mode |= open->op_share_access; |
b55e0ba1 BF |
1615 | __set_bit(open->op_share_access, &stp->st_access_bmap); |
1616 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); | |
1da177e4 LT |
1617 | |
1618 | return nfs_ok; | |
1619 | } | |
1620 | ||
1621 | ||
1da177e4 | 1622 | static void |
37515177 | 1623 | nfs4_set_claim_prev(struct nfsd4_open *open) |
1da177e4 | 1624 | { |
37515177 N |
1625 | open->op_stateowner->so_confirmed = 1; |
1626 | open->op_stateowner->so_client->cl_firststate = 1; | |
1da177e4 LT |
1627 | } |
1628 | ||
1629 | /* | |
1630 | * Attempt to hand out a delegation. | |
1631 | */ | |
1632 | static void | |
1633 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) | |
1634 | { | |
1635 | struct nfs4_delegation *dp; | |
1636 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
1637 | struct nfs4_callback *cb = &sop->so_client->cl_callback; | |
1638 | struct file_lock fl, *flp = &fl; | |
1639 | int status, flag = 0; | |
1640 | ||
1641 | flag = NFS4_OPEN_DELEGATE_NONE; | |
7b190fec N |
1642 | open->op_recall = 0; |
1643 | switch (open->op_claim_type) { | |
1644 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
1645 | if (!atomic_read(&cb->cb_set)) | |
1646 | open->op_recall = 1; | |
1647 | flag = open->op_delegate_type; | |
1648 | if (flag == NFS4_OPEN_DELEGATE_NONE) | |
1649 | goto out; | |
1650 | break; | |
1651 | case NFS4_OPEN_CLAIM_NULL: | |
1652 | /* Let's not give out any delegations till everyone's | |
1653 | * had the chance to reclaim theirs.... */ | |
af558e33 | 1654 | if (locks_in_grace()) |
7b190fec N |
1655 | goto out; |
1656 | if (!atomic_read(&cb->cb_set) || !sop->so_confirmed) | |
1657 | goto out; | |
1658 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | |
1659 | flag = NFS4_OPEN_DELEGATE_WRITE; | |
1660 | else | |
1661 | flag = NFS4_OPEN_DELEGATE_READ; | |
1662 | break; | |
1663 | default: | |
1664 | goto out; | |
1665 | } | |
1da177e4 LT |
1666 | |
1667 | dp = alloc_init_deleg(sop->so_client, stp, fh, flag); | |
1668 | if (dp == NULL) { | |
1669 | flag = NFS4_OPEN_DELEGATE_NONE; | |
1670 | goto out; | |
1671 | } | |
1672 | locks_init_lock(&fl); | |
1673 | fl.fl_lmops = &nfsd_lease_mng_ops; | |
1674 | fl.fl_flags = FL_LEASE; | |
9167f501 | 1675 | fl.fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; |
1da177e4 LT |
1676 | fl.fl_end = OFFSET_MAX; |
1677 | fl.fl_owner = (fl_owner_t)dp; | |
1678 | fl.fl_file = stp->st_vfs_file; | |
1679 | fl.fl_pid = current->tgid; | |
1680 | ||
a9933cea | 1681 | /* vfs_setlease checks to see if delegation should be handed out. |
1da177e4 LT |
1682 | * the lock_manager callbacks fl_mylease and fl_change are used |
1683 | */ | |
9167f501 | 1684 | if ((status = vfs_setlease(stp->st_vfs_file, fl.fl_type, &flp))) { |
1da177e4 | 1685 | dprintk("NFSD: setlease failed [%d], no delegation\n", status); |
c907132d | 1686 | unhash_delegation(dp); |
1da177e4 LT |
1687 | flag = NFS4_OPEN_DELEGATE_NONE; |
1688 | goto out; | |
1689 | } | |
1690 | ||
1691 | memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); | |
1692 | ||
1693 | dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n", | |
1694 | dp->dl_stateid.si_boot, | |
1695 | dp->dl_stateid.si_stateownerid, | |
1696 | dp->dl_stateid.si_fileid, | |
1697 | dp->dl_stateid.si_generation); | |
1698 | out: | |
7b190fec N |
1699 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS |
1700 | && flag == NFS4_OPEN_DELEGATE_NONE | |
1701 | && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) | |
2fdada03 | 1702 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
1da177e4 LT |
1703 | open->op_delegate_type = flag; |
1704 | } | |
1705 | ||
1706 | /* | |
1707 | * called with nfs4_lock_state() held. | |
1708 | */ | |
b37ad28b | 1709 | __be32 |
1da177e4 LT |
1710 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
1711 | { | |
1712 | struct nfs4_file *fp = NULL; | |
1713 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
1714 | struct nfs4_stateid *stp = NULL; | |
567d9829 | 1715 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 1716 | __be32 status; |
1da177e4 LT |
1717 | |
1718 | status = nfserr_inval; | |
ba5a6a19 BF |
1719 | if (!access_valid(open->op_share_access) |
1720 | || !deny_valid(open->op_share_deny)) | |
1da177e4 LT |
1721 | goto out; |
1722 | /* | |
1723 | * Lookup file; if found, lookup stateid and check open request, | |
1724 | * and check for delegations in the process of being recalled. | |
1725 | * If not found, create the nfs4_file struct | |
1726 | */ | |
1727 | fp = find_file(ino); | |
1728 | if (fp) { | |
1729 | if ((status = nfs4_check_open(fp, open, &stp))) | |
1730 | goto out; | |
c44c5eeb N |
1731 | status = nfs4_check_deleg(fp, open, &dp); |
1732 | if (status) | |
1733 | goto out; | |
1da177e4 | 1734 | } else { |
c44c5eeb N |
1735 | status = nfserr_bad_stateid; |
1736 | if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
1737 | goto out; | |
1da177e4 LT |
1738 | status = nfserr_resource; |
1739 | fp = alloc_init_file(ino); | |
1740 | if (fp == NULL) | |
1741 | goto out; | |
1742 | } | |
1743 | ||
1744 | /* | |
1745 | * OPEN the file, or upgrade an existing OPEN. | |
1746 | * If truncate fails, the OPEN fails. | |
1747 | */ | |
1748 | if (stp) { | |
1749 | /* Stateid was found, this is an OPEN upgrade */ | |
1750 | status = nfs4_upgrade_open(rqstp, current_fh, stp, open); | |
1751 | if (status) | |
1752 | goto out; | |
444c2c07 | 1753 | update_stateid(&stp->st_stateid); |
1da177e4 LT |
1754 | } else { |
1755 | /* Stateid was not found, this is a new OPEN */ | |
1756 | int flags = 0; | |
9ecb6a08 | 1757 | if (open->op_share_access & NFS4_SHARE_ACCESS_READ) |
8837abca | 1758 | flags |= NFSD_MAY_READ; |
1da177e4 | 1759 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
8837abca | 1760 | flags |= NFSD_MAY_WRITE; |
567d9829 N |
1761 | status = nfs4_new_open(rqstp, &stp, dp, current_fh, flags); |
1762 | if (status) | |
1da177e4 LT |
1763 | goto out; |
1764 | init_stateid(stp, fp, open); | |
1765 | status = nfsd4_truncate(rqstp, current_fh, open); | |
1766 | if (status) { | |
1767 | release_stateid(stp, OPEN_STATE); | |
1768 | goto out; | |
1769 | } | |
1770 | } | |
1771 | memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
1772 | ||
1773 | /* | |
1774 | * Attempt to hand out a delegation. No error return, because the | |
1775 | * OPEN succeeds even if we fail. | |
1776 | */ | |
1777 | nfs4_open_delegation(current_fh, open, stp); | |
1778 | ||
1779 | status = nfs_ok; | |
1780 | ||
1781 | dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n", | |
1782 | stp->st_stateid.si_boot, stp->st_stateid.si_stateownerid, | |
1783 | stp->st_stateid.si_fileid, stp->st_stateid.si_generation); | |
1784 | out: | |
13cd2184 N |
1785 | if (fp) |
1786 | put_nfs4_file(fp); | |
37515177 N |
1787 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
1788 | nfs4_set_claim_prev(open); | |
1da177e4 LT |
1789 | /* |
1790 | * To finish the open response, we just need to set the rflags. | |
1791 | */ | |
1792 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
1793 | if (!open->op_stateowner->so_confirmed) | |
1794 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; | |
1795 | ||
1796 | return status; | |
1797 | } | |
1798 | ||
b37ad28b | 1799 | __be32 |
b591480b BF |
1800 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
1801 | clientid_t *clid) | |
1da177e4 LT |
1802 | { |
1803 | struct nfs4_client *clp; | |
b37ad28b | 1804 | __be32 status; |
1da177e4 LT |
1805 | |
1806 | nfs4_lock_state(); | |
1807 | dprintk("process_renew(%08x/%08x): starting\n", | |
1808 | clid->cl_boot, clid->cl_id); | |
1809 | status = nfserr_stale_clientid; | |
1810 | if (STALE_CLIENTID(clid)) | |
1811 | goto out; | |
1812 | clp = find_confirmed_client(clid); | |
1813 | status = nfserr_expired; | |
1814 | if (clp == NULL) { | |
1815 | /* We assume the client took too long to RENEW. */ | |
1816 | dprintk("nfsd4_renew: clientid not found!\n"); | |
1817 | goto out; | |
1818 | } | |
1819 | renew_client(clp); | |
1820 | status = nfserr_cb_path_down; | |
ea1da636 | 1821 | if (!list_empty(&clp->cl_delegations) |
1da177e4 LT |
1822 | && !atomic_read(&clp->cl_callback.cb_set)) |
1823 | goto out; | |
1824 | status = nfs_ok; | |
1825 | out: | |
1826 | nfs4_unlock_state(); | |
1827 | return status; | |
1828 | } | |
1829 | ||
af558e33 BF |
1830 | struct lock_manager nfsd4_manager = { |
1831 | }; | |
1832 | ||
a76b4319 | 1833 | static void |
af558e33 | 1834 | nfsd4_end_grace(void) |
a76b4319 N |
1835 | { |
1836 | dprintk("NFSD: end of grace period\n"); | |
c7b9a459 | 1837 | nfsd4_recdir_purge_old(); |
af558e33 | 1838 | locks_end_grace(&nfsd4_manager); |
a76b4319 N |
1839 | } |
1840 | ||
fd39ca9a | 1841 | static time_t |
1da177e4 LT |
1842 | nfs4_laundromat(void) |
1843 | { | |
1844 | struct nfs4_client *clp; | |
1845 | struct nfs4_stateowner *sop; | |
1846 | struct nfs4_delegation *dp; | |
1847 | struct list_head *pos, *next, reaplist; | |
1848 | time_t cutoff = get_seconds() - NFSD_LEASE_TIME; | |
1849 | time_t t, clientid_val = NFSD_LEASE_TIME; | |
1850 | time_t u, test_val = NFSD_LEASE_TIME; | |
1851 | ||
1852 | nfs4_lock_state(); | |
1853 | ||
1854 | dprintk("NFSD: laundromat service - starting\n"); | |
af558e33 BF |
1855 | if (locks_in_grace()) |
1856 | nfsd4_end_grace(); | |
1da177e4 LT |
1857 | list_for_each_safe(pos, next, &client_lru) { |
1858 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1859 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
1860 | t = clp->cl_time - cutoff; | |
1861 | if (clientid_val > t) | |
1862 | clientid_val = t; | |
1863 | break; | |
1864 | } | |
1865 | dprintk("NFSD: purging unused client (clientid %08x)\n", | |
1866 | clp->cl_clientid.cl_id); | |
c7b9a459 | 1867 | nfsd4_remove_clid_dir(clp); |
1da177e4 LT |
1868 | expire_client(clp); |
1869 | } | |
1870 | INIT_LIST_HEAD(&reaplist); | |
1871 | spin_lock(&recall_lock); | |
1872 | list_for_each_safe(pos, next, &del_recall_lru) { | |
1873 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
1874 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
1875 | u = dp->dl_time - cutoff; | |
1876 | if (test_val > u) | |
1877 | test_val = u; | |
1878 | break; | |
1879 | } | |
1880 | dprintk("NFSD: purging unused delegation dp %p, fp %p\n", | |
1881 | dp, dp->dl_flock); | |
1882 | list_move(&dp->dl_recall_lru, &reaplist); | |
1883 | } | |
1884 | spin_unlock(&recall_lock); | |
1885 | list_for_each_safe(pos, next, &reaplist) { | |
1886 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
1887 | list_del_init(&dp->dl_recall_lru); | |
1888 | unhash_delegation(dp); | |
1889 | } | |
1890 | test_val = NFSD_LEASE_TIME; | |
1891 | list_for_each_safe(pos, next, &close_lru) { | |
1892 | sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); | |
1893 | if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { | |
1894 | u = sop->so_time - cutoff; | |
1895 | if (test_val > u) | |
1896 | test_val = u; | |
1897 | break; | |
1898 | } | |
1899 | dprintk("NFSD: purging unused open stateowner (so_id %d)\n", | |
1900 | sop->so_id); | |
358dd55a | 1901 | release_stateowner(sop); |
1da177e4 LT |
1902 | } |
1903 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
1904 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
1905 | nfs4_unlock_state(); | |
1906 | return clientid_val; | |
1907 | } | |
1908 | ||
a254b246 HH |
1909 | static struct workqueue_struct *laundry_wq; |
1910 | static void laundromat_main(struct work_struct *); | |
1911 | static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); | |
1912 | ||
1913 | static void | |
c4028958 | 1914 | laundromat_main(struct work_struct *not_used) |
1da177e4 LT |
1915 | { |
1916 | time_t t; | |
1917 | ||
1918 | t = nfs4_laundromat(); | |
1919 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); | |
58da282b | 1920 | queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); |
1da177e4 LT |
1921 | } |
1922 | ||
fd39ca9a | 1923 | static struct nfs4_stateowner * |
f8816512 N |
1924 | search_close_lru(u32 st_id, int flags) |
1925 | { | |
1da177e4 LT |
1926 | struct nfs4_stateowner *local = NULL; |
1927 | ||
1da177e4 LT |
1928 | if (flags & CLOSE_STATE) { |
1929 | list_for_each_entry(local, &close_lru, so_close_lru) { | |
1930 | if (local->so_id == st_id) | |
1931 | return local; | |
1932 | } | |
1933 | } | |
1934 | return NULL; | |
1935 | } | |
1936 | ||
1937 | static inline int | |
1938 | nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) | |
1939 | { | |
7eaa36e2 | 1940 | return fhp->fh_dentry->d_inode != stp->st_vfs_file->f_path.dentry->d_inode; |
1da177e4 LT |
1941 | } |
1942 | ||
1943 | static int | |
1944 | STALE_STATEID(stateid_t *stateid) | |
1945 | { | |
1946 | if (stateid->si_boot == boot_time) | |
1947 | return 0; | |
849823c5 | 1948 | dprintk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n", |
1da177e4 LT |
1949 | stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, |
1950 | stateid->si_generation); | |
1951 | return 1; | |
1952 | } | |
1953 | ||
1954 | static inline int | |
1955 | access_permit_read(unsigned long access_bmap) | |
1956 | { | |
1957 | return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || | |
1958 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || | |
1959 | test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); | |
1960 | } | |
1961 | ||
1962 | static inline int | |
1963 | access_permit_write(unsigned long access_bmap) | |
1964 | { | |
1965 | return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || | |
1966 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); | |
1967 | } | |
1968 | ||
1969 | static | |
b37ad28b | 1970 | __be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags) |
1da177e4 | 1971 | { |
b37ad28b | 1972 | __be32 status = nfserr_openmode; |
1da177e4 LT |
1973 | |
1974 | if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) | |
1975 | goto out; | |
1976 | if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) | |
1977 | goto out; | |
1978 | status = nfs_ok; | |
1979 | out: | |
1980 | return status; | |
1981 | } | |
1982 | ||
b37ad28b | 1983 | static inline __be32 |
1da177e4 LT |
1984 | check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) |
1985 | { | |
1986 | /* Trying to call delegreturn with a special stateid? Yuch: */ | |
1987 | if (!(flags & (RD_STATE | WR_STATE))) | |
1988 | return nfserr_bad_stateid; | |
1989 | else if (ONE_STATEID(stateid) && (flags & RD_STATE)) | |
1990 | return nfs_ok; | |
af558e33 | 1991 | else if (locks_in_grace()) { |
1da177e4 LT |
1992 | /* Answer in remaining cases depends on existance of |
1993 | * conflicting state; so we must wait out the grace period. */ | |
1994 | return nfserr_grace; | |
1995 | } else if (flags & WR_STATE) | |
1996 | return nfs4_share_conflict(current_fh, | |
1997 | NFS4_SHARE_DENY_WRITE); | |
1998 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
1999 | return nfs4_share_conflict(current_fh, | |
2000 | NFS4_SHARE_DENY_READ); | |
2001 | } | |
2002 | ||
2003 | /* | |
2004 | * Allow READ/WRITE during grace period on recovered state only for files | |
2005 | * that are not able to provide mandatory locking. | |
2006 | */ | |
2007 | static inline int | |
2008 | io_during_grace_disallowed(struct inode *inode, int flags) | |
2009 | { | |
af558e33 | 2010 | return locks_in_grace() && (flags & (RD_STATE | WR_STATE)) |
a16877ca | 2011 | && mandatory_lock(inode); |
1da177e4 LT |
2012 | } |
2013 | ||
0836f587 BF |
2014 | static int check_stateid_generation(stateid_t *in, stateid_t *ref) |
2015 | { | |
2016 | /* If the client sends us a stateid from the future, it's buggy: */ | |
2017 | if (in->si_generation > ref->si_generation) | |
2018 | return nfserr_bad_stateid; | |
2019 | /* | |
2020 | * The following, however, can happen. For example, if the | |
2021 | * client sends an open and some IO at the same time, the open | |
2022 | * may bump si_generation while the IO is still in flight. | |
2023 | * Thanks to hard links and renames, the client never knows what | |
2024 | * file an open will affect. So it could avoid that situation | |
2025 | * only by serializing all opens and IO from the same open | |
2026 | * owner. To recover from the old_stateid error, the client | |
2027 | * will just have to retry the IO: | |
2028 | */ | |
2029 | if (in->si_generation < ref->si_generation) | |
2030 | return nfserr_old_stateid; | |
2031 | return nfs_ok; | |
2032 | } | |
2033 | ||
1da177e4 LT |
2034 | /* |
2035 | * Checks for stateid operations | |
2036 | */ | |
b37ad28b | 2037 | __be32 |
1da177e4 LT |
2038 | nfs4_preprocess_stateid_op(struct svc_fh *current_fh, stateid_t *stateid, int flags, struct file **filpp) |
2039 | { | |
2040 | struct nfs4_stateid *stp = NULL; | |
2041 | struct nfs4_delegation *dp = NULL; | |
2042 | stateid_t *stidp; | |
2043 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
b37ad28b | 2044 | __be32 status; |
1da177e4 LT |
2045 | |
2046 | dprintk("NFSD: preprocess_stateid_op: stateid = (%08x/%08x/%08x/%08x)\n", | |
2047 | stateid->si_boot, stateid->si_stateownerid, | |
2048 | stateid->si_fileid, stateid->si_generation); | |
2049 | if (filpp) | |
2050 | *filpp = NULL; | |
2051 | ||
2052 | if (io_during_grace_disallowed(ino, flags)) | |
2053 | return nfserr_grace; | |
2054 | ||
2055 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
2056 | return check_special_stateids(current_fh, stateid, flags); | |
2057 | ||
2058 | /* STALE STATEID */ | |
2059 | status = nfserr_stale_stateid; | |
2060 | if (STALE_STATEID(stateid)) | |
2061 | goto out; | |
2062 | ||
2063 | /* BAD STATEID */ | |
2064 | status = nfserr_bad_stateid; | |
2065 | if (!stateid->si_fileid) { /* delegation stateid */ | |
2066 | if(!(dp = find_delegation_stateid(ino, stateid))) { | |
2067 | dprintk("NFSD: delegation stateid not found\n"); | |
1da177e4 LT |
2068 | goto out; |
2069 | } | |
2070 | stidp = &dp->dl_stateid; | |
2071 | } else { /* open or lock stateid */ | |
2072 | if (!(stp = find_stateid(stateid, flags))) { | |
2073 | dprintk("NFSD: open or lock stateid not found\n"); | |
1da177e4 LT |
2074 | goto out; |
2075 | } | |
2076 | if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp)) | |
2077 | goto out; | |
2078 | if (!stp->st_stateowner->so_confirmed) | |
2079 | goto out; | |
2080 | stidp = &stp->st_stateid; | |
2081 | } | |
0836f587 BF |
2082 | status = check_stateid_generation(stateid, stidp); |
2083 | if (status) | |
1da177e4 LT |
2084 | goto out; |
2085 | if (stp) { | |
2086 | if ((status = nfs4_check_openmode(stp,flags))) | |
2087 | goto out; | |
2088 | renew_client(stp->st_stateowner->so_client); | |
2089 | if (filpp) | |
2090 | *filpp = stp->st_vfs_file; | |
6a85fa3a | 2091 | } else { |
1da177e4 LT |
2092 | if ((status = nfs4_check_delegmode(dp, flags))) |
2093 | goto out; | |
2094 | renew_client(dp->dl_client); | |
2095 | if (flags & DELEG_RET) | |
2096 | unhash_delegation(dp); | |
2097 | if (filpp) | |
2098 | *filpp = dp->dl_vfs_file; | |
2099 | } | |
2100 | status = nfs_ok; | |
2101 | out: | |
2102 | return status; | |
2103 | } | |
2104 | ||
4c4cd222 N |
2105 | static inline int |
2106 | setlkflg (int type) | |
2107 | { | |
2108 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
2109 | RD_STATE : WR_STATE; | |
2110 | } | |
1da177e4 LT |
2111 | |
2112 | /* | |
2113 | * Checks for sequence id mutating operations. | |
2114 | */ | |
b37ad28b | 2115 | static __be32 |
4c4cd222 | 2116 | 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 | 2117 | { |
1da177e4 LT |
2118 | struct nfs4_stateid *stp; |
2119 | struct nfs4_stateowner *sop; | |
0836f587 | 2120 | __be32 status; |
1da177e4 LT |
2121 | |
2122 | dprintk("NFSD: preprocess_seqid_op: seqid=%d " | |
2123 | "stateid = (%08x/%08x/%08x/%08x)\n", seqid, | |
2124 | stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, | |
2125 | stateid->si_generation); | |
3a4f98bb | 2126 | |
1da177e4 LT |
2127 | *stpp = NULL; |
2128 | *sopp = NULL; | |
2129 | ||
1da177e4 | 2130 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { |
2fdada03 | 2131 | dprintk("NFSD: preprocess_seqid_op: magic stateid!\n"); |
3a4f98bb | 2132 | return nfserr_bad_stateid; |
1da177e4 LT |
2133 | } |
2134 | ||
1da177e4 | 2135 | if (STALE_STATEID(stateid)) |
3a4f98bb | 2136 | return nfserr_stale_stateid; |
1da177e4 LT |
2137 | /* |
2138 | * We return BAD_STATEID if filehandle doesn't match stateid, | |
2139 | * the confirmed flag is incorrecly set, or the generation | |
2140 | * number is incorrect. | |
1da177e4 | 2141 | */ |
f8816512 N |
2142 | stp = find_stateid(stateid, flags); |
2143 | if (stp == NULL) { | |
2144 | /* | |
2145 | * Also, we should make sure this isn't just the result of | |
2146 | * a replayed close: | |
2147 | */ | |
2148 | sop = search_close_lru(stateid->si_stateownerid, flags); | |
2149 | if (sop == NULL) | |
2150 | return nfserr_bad_stateid; | |
2151 | *sopp = sop; | |
2152 | goto check_replay; | |
2153 | } | |
1da177e4 | 2154 | |
39325bd0 BF |
2155 | *stpp = stp; |
2156 | *sopp = sop = stp->st_stateowner; | |
2157 | ||
4c4cd222 | 2158 | if (lock) { |
4c4cd222 | 2159 | clientid_t *lockclid = &lock->v.new.clientid; |
1da177e4 | 2160 | struct nfs4_client *clp = sop->so_client; |
4c4cd222 | 2161 | int lkflg = 0; |
b37ad28b | 2162 | __be32 status; |
4c4cd222 N |
2163 | |
2164 | lkflg = setlkflg(lock->lk_type); | |
2165 | ||
2166 | if (lock->lk_is_new) { | |
599e0a22 BF |
2167 | if (!sop->so_is_open_owner) |
2168 | return nfserr_bad_stateid; | |
2169 | if (!same_clid(&clp->cl_clientid, lockclid)) | |
4c4cd222 | 2170 | return nfserr_bad_stateid; |
599e0a22 BF |
2171 | /* stp is the open stateid */ |
2172 | status = nfs4_check_openmode(stp, lkflg); | |
2173 | if (status) | |
2174 | return status; | |
2175 | } else { | |
2176 | /* stp is the lock stateid */ | |
2177 | status = nfs4_check_openmode(stp->st_openstp, lkflg); | |
2178 | if (status) | |
2179 | return status; | |
4c4cd222 | 2180 | } |
1da177e4 LT |
2181 | } |
2182 | ||
f3362737 | 2183 | if (nfs4_check_fh(current_fh, stp)) { |
2fdada03 | 2184 | dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); |
3a4f98bb | 2185 | return nfserr_bad_stateid; |
1da177e4 LT |
2186 | } |
2187 | ||
1da177e4 LT |
2188 | /* |
2189 | * We now validate the seqid and stateid generation numbers. | |
2190 | * For the moment, we ignore the possibility of | |
2191 | * generation number wraparound. | |
2192 | */ | |
bd9aac52 | 2193 | if (seqid != sop->so_seqid) |
1da177e4 LT |
2194 | goto check_replay; |
2195 | ||
3a4f98bb | 2196 | if (sop->so_confirmed && flags & CONFIRM) { |
2fdada03 | 2197 | dprintk("NFSD: preprocess_seqid_op: expected" |
3a4f98bb N |
2198 | " unconfirmed stateowner!\n"); |
2199 | return nfserr_bad_stateid; | |
1da177e4 | 2200 | } |
3a4f98bb | 2201 | if (!sop->so_confirmed && !(flags & CONFIRM)) { |
2fdada03 | 2202 | dprintk("NFSD: preprocess_seqid_op: stateowner not" |
3a4f98bb N |
2203 | " confirmed yet!\n"); |
2204 | return nfserr_bad_stateid; | |
1da177e4 | 2205 | } |
0836f587 BF |
2206 | status = check_stateid_generation(stateid, &stp->st_stateid); |
2207 | if (status) | |
2208 | return status; | |
52fd004e | 2209 | renew_client(sop->so_client); |
3a4f98bb | 2210 | return nfs_ok; |
1da177e4 | 2211 | |
1da177e4 | 2212 | check_replay: |
bd9aac52 | 2213 | if (seqid == sop->so_seqid - 1) { |
849823c5 | 2214 | dprintk("NFSD: preprocess_seqid_op: retransmission?\n"); |
1da177e4 | 2215 | /* indicate replay to calling function */ |
a90b061c | 2216 | return nfserr_replay_me; |
1da177e4 | 2217 | } |
2fdada03 | 2218 | dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n", |
3a4f98bb N |
2219 | sop->so_seqid, seqid); |
2220 | *sopp = NULL; | |
2221 | return nfserr_bad_seqid; | |
1da177e4 LT |
2222 | } |
2223 | ||
b37ad28b | 2224 | __be32 |
ca364317 | 2225 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 2226 | struct nfsd4_open_confirm *oc) |
1da177e4 | 2227 | { |
b37ad28b | 2228 | __be32 status; |
1da177e4 LT |
2229 | struct nfs4_stateowner *sop; |
2230 | struct nfs4_stateid *stp; | |
2231 | ||
2232 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | |
ca364317 BF |
2233 | (int)cstate->current_fh.fh_dentry->d_name.len, |
2234 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 2235 | |
ca364317 | 2236 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
2237 | if (status) |
2238 | return status; | |
1da177e4 LT |
2239 | |
2240 | nfs4_lock_state(); | |
2241 | ||
ca364317 BF |
2242 | if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
2243 | oc->oc_seqid, &oc->oc_req_stateid, | |
f3362737 | 2244 | CONFIRM | OPEN_STATE, |
1da177e4 LT |
2245 | &oc->oc_stateowner, &stp, NULL))) |
2246 | goto out; | |
2247 | ||
2248 | sop = oc->oc_stateowner; | |
2249 | sop->so_confirmed = 1; | |
2250 | update_stateid(&stp->st_stateid); | |
2251 | memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2252 | dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d " | |
2253 | "stateid=(%08x/%08x/%08x/%08x)\n", oc->oc_seqid, | |
2254 | stp->st_stateid.si_boot, | |
2255 | stp->st_stateid.si_stateownerid, | |
2256 | stp->st_stateid.si_fileid, | |
2257 | stp->st_stateid.si_generation); | |
c7b9a459 N |
2258 | |
2259 | nfsd4_create_clid_dir(sop->so_client); | |
1da177e4 | 2260 | out: |
f2327d9a | 2261 | if (oc->oc_stateowner) { |
1da177e4 | 2262 | nfs4_get_stateowner(oc->oc_stateowner); |
a4f1706a | 2263 | cstate->replay_owner = oc->oc_stateowner; |
f2327d9a | 2264 | } |
1da177e4 LT |
2265 | nfs4_unlock_state(); |
2266 | return status; | |
2267 | } | |
2268 | ||
2269 | ||
2270 | /* | |
2271 | * unset all bits in union bitmap (bmap) that | |
2272 | * do not exist in share (from successful OPEN_DOWNGRADE) | |
2273 | */ | |
2274 | static void | |
2275 | reset_union_bmap_access(unsigned long access, unsigned long *bmap) | |
2276 | { | |
2277 | int i; | |
2278 | for (i = 1; i < 4; i++) { | |
2279 | if ((i & access) != i) | |
2280 | __clear_bit(i, bmap); | |
2281 | } | |
2282 | } | |
2283 | ||
2284 | static void | |
2285 | reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) | |
2286 | { | |
2287 | int i; | |
2288 | for (i = 0; i < 4; i++) { | |
2289 | if ((i & deny) != i) | |
2290 | __clear_bit(i, bmap); | |
2291 | } | |
2292 | } | |
2293 | ||
b37ad28b | 2294 | __be32 |
ca364317 BF |
2295 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
2296 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 2297 | struct nfsd4_open_downgrade *od) |
1da177e4 | 2298 | { |
b37ad28b | 2299 | __be32 status; |
1da177e4 LT |
2300 | struct nfs4_stateid *stp; |
2301 | unsigned int share_access; | |
2302 | ||
2303 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | |
ca364317 BF |
2304 | (int)cstate->current_fh.fh_dentry->d_name.len, |
2305 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 2306 | |
ba5a6a19 BF |
2307 | if (!access_valid(od->od_share_access) |
2308 | || !deny_valid(od->od_share_deny)) | |
1da177e4 LT |
2309 | return nfserr_inval; |
2310 | ||
2311 | nfs4_lock_state(); | |
ca364317 BF |
2312 | if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
2313 | od->od_seqid, | |
1da177e4 | 2314 | &od->od_stateid, |
f3362737 | 2315 | OPEN_STATE, |
1da177e4 LT |
2316 | &od->od_stateowner, &stp, NULL))) |
2317 | goto out; | |
2318 | ||
2319 | status = nfserr_inval; | |
2320 | if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { | |
2321 | dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
2322 | stp->st_access_bmap, od->od_share_access); | |
2323 | goto out; | |
2324 | } | |
2325 | if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { | |
2326 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", | |
2327 | stp->st_deny_bmap, od->od_share_deny); | |
2328 | goto out; | |
2329 | } | |
2330 | set_access(&share_access, stp->st_access_bmap); | |
2331 | nfs4_file_downgrade(stp->st_vfs_file, | |
2332 | share_access & ~od->od_share_access); | |
2333 | ||
2334 | reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap); | |
2335 | reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); | |
2336 | ||
2337 | update_stateid(&stp->st_stateid); | |
2338 | memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2339 | status = nfs_ok; | |
2340 | out: | |
f2327d9a | 2341 | if (od->od_stateowner) { |
1da177e4 | 2342 | nfs4_get_stateowner(od->od_stateowner); |
a4f1706a | 2343 | cstate->replay_owner = od->od_stateowner; |
f2327d9a | 2344 | } |
1da177e4 LT |
2345 | nfs4_unlock_state(); |
2346 | return status; | |
2347 | } | |
2348 | ||
2349 | /* | |
2350 | * nfs4_unlock_state() called after encode | |
2351 | */ | |
b37ad28b | 2352 | __be32 |
ca364317 | 2353 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 2354 | struct nfsd4_close *close) |
1da177e4 | 2355 | { |
b37ad28b | 2356 | __be32 status; |
1da177e4 LT |
2357 | struct nfs4_stateid *stp; |
2358 | ||
2359 | dprintk("NFSD: nfsd4_close on file %.*s\n", | |
ca364317 BF |
2360 | (int)cstate->current_fh.fh_dentry->d_name.len, |
2361 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 LT |
2362 | |
2363 | nfs4_lock_state(); | |
2364 | /* check close_lru for replay */ | |
ca364317 BF |
2365 | if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
2366 | close->cl_seqid, | |
1da177e4 | 2367 | &close->cl_stateid, |
f3362737 | 2368 | OPEN_STATE | CLOSE_STATE, |
1da177e4 LT |
2369 | &close->cl_stateowner, &stp, NULL))) |
2370 | goto out; | |
1da177e4 LT |
2371 | status = nfs_ok; |
2372 | update_stateid(&stp->st_stateid); | |
2373 | memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2374 | ||
04ef5954 BF |
2375 | /* release_stateid() calls nfsd_close() if needed */ |
2376 | release_stateid(stp, OPEN_STATE); | |
2377 | ||
2378 | /* place unused nfs4_stateowners on so_close_lru list to be | |
2379 | * released by the laundromat service after the lease period | |
2380 | * to enable us to handle CLOSE replay | |
2381 | */ | |
2382 | if (list_empty(&close->cl_stateowner->so_stateids)) | |
2383 | move_to_close_lru(close->cl_stateowner); | |
1da177e4 | 2384 | out: |
f2327d9a | 2385 | if (close->cl_stateowner) { |
1da177e4 | 2386 | nfs4_get_stateowner(close->cl_stateowner); |
a4f1706a | 2387 | cstate->replay_owner = close->cl_stateowner; |
f2327d9a | 2388 | } |
1da177e4 LT |
2389 | nfs4_unlock_state(); |
2390 | return status; | |
2391 | } | |
2392 | ||
b37ad28b | 2393 | __be32 |
ca364317 BF |
2394 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2395 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 2396 | { |
b37ad28b | 2397 | __be32 status; |
1da177e4 | 2398 | |
ca364317 | 2399 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 LT |
2400 | goto out; |
2401 | ||
2402 | nfs4_lock_state(); | |
ca364317 BF |
2403 | status = nfs4_preprocess_stateid_op(&cstate->current_fh, |
2404 | &dr->dr_stateid, DELEG_RET, NULL); | |
1da177e4 LT |
2405 | nfs4_unlock_state(); |
2406 | out: | |
2407 | return status; | |
2408 | } | |
2409 | ||
2410 | ||
2411 | /* | |
2412 | * Lock owner state (byte-range locks) | |
2413 | */ | |
2414 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) | |
2415 | #define LOCK_HASH_BITS 8 | |
2416 | #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) | |
2417 | #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) | |
2418 | ||
2419 | #define lockownerid_hashval(id) \ | |
2420 | ((id) & LOCK_HASH_MASK) | |
2421 | ||
2422 | static inline unsigned int | |
2423 | lock_ownerstr_hashval(struct inode *inode, u32 cl_id, | |
2424 | struct xdr_netobj *ownername) | |
2425 | { | |
2426 | return (file_hashval(inode) + cl_id | |
2427 | + opaque_hashval(ownername->data, ownername->len)) | |
2428 | & LOCK_HASH_MASK; | |
2429 | } | |
2430 | ||
2431 | static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; | |
2432 | static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; | |
2433 | static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; | |
2434 | ||
fd39ca9a | 2435 | static struct nfs4_stateid * |
1da177e4 LT |
2436 | find_stateid(stateid_t *stid, int flags) |
2437 | { | |
9346eff0 | 2438 | struct nfs4_stateid *local; |
1da177e4 LT |
2439 | u32 st_id = stid->si_stateownerid; |
2440 | u32 f_id = stid->si_fileid; | |
2441 | unsigned int hashval; | |
2442 | ||
2443 | dprintk("NFSD: find_stateid flags 0x%x\n",flags); | |
9346eff0 | 2444 | if (flags & (LOCK_STATE | RD_STATE | WR_STATE)) { |
1da177e4 LT |
2445 | hashval = stateid_hashval(st_id, f_id); |
2446 | list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { | |
2447 | if ((local->st_stateid.si_stateownerid == st_id) && | |
2448 | (local->st_stateid.si_fileid == f_id)) | |
2449 | return local; | |
2450 | } | |
2451 | } | |
9346eff0 KK |
2452 | |
2453 | if (flags & (OPEN_STATE | RD_STATE | WR_STATE)) { | |
1da177e4 LT |
2454 | hashval = stateid_hashval(st_id, f_id); |
2455 | list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { | |
2456 | if ((local->st_stateid.si_stateownerid == st_id) && | |
2457 | (local->st_stateid.si_fileid == f_id)) | |
2458 | return local; | |
2459 | } | |
849823c5 | 2460 | } |
1da177e4 LT |
2461 | return NULL; |
2462 | } | |
2463 | ||
2464 | static struct nfs4_delegation * | |
2465 | find_delegation_stateid(struct inode *ino, stateid_t *stid) | |
2466 | { | |
13cd2184 N |
2467 | struct nfs4_file *fp; |
2468 | struct nfs4_delegation *dl; | |
1da177e4 LT |
2469 | |
2470 | dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n", | |
2471 | stid->si_boot, stid->si_stateownerid, | |
2472 | stid->si_fileid, stid->si_generation); | |
2473 | ||
1da177e4 | 2474 | fp = find_file(ino); |
13cd2184 N |
2475 | if (!fp) |
2476 | return NULL; | |
2477 | dl = find_delegation_file(fp, stid); | |
2478 | put_nfs4_file(fp); | |
2479 | return dl; | |
1da177e4 LT |
2480 | } |
2481 | ||
2482 | /* | |
2483 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
2484 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
2485 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
2486 | * locking, this prevents us from being completely protocol-compliant. The | |
2487 | * real solution to this problem is to start using unsigned file offsets in | |
2488 | * the VFS, but this is a very deep change! | |
2489 | */ | |
2490 | static inline void | |
2491 | nfs4_transform_lock_offset(struct file_lock *lock) | |
2492 | { | |
2493 | if (lock->fl_start < 0) | |
2494 | lock->fl_start = OFFSET_MAX; | |
2495 | if (lock->fl_end < 0) | |
2496 | lock->fl_end = OFFSET_MAX; | |
2497 | } | |
2498 | ||
d5b9026a N |
2499 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
2500 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
e465a77f | 2501 | static struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 2502 | }; |
1da177e4 LT |
2503 | |
2504 | static inline void | |
2505 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
2506 | { | |
d5b9026a N |
2507 | struct nfs4_stateowner *sop; |
2508 | unsigned int hval; | |
1da177e4 | 2509 | |
d5b9026a N |
2510 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
2511 | sop = (struct nfs4_stateowner *) fl->fl_owner; | |
2512 | hval = lockownerid_hashval(sop->so_id); | |
1da177e4 LT |
2513 | kref_get(&sop->so_ref); |
2514 | deny->ld_sop = sop; | |
2515 | deny->ld_clientid = sop->so_client->cl_clientid; | |
d5b9026a N |
2516 | } else { |
2517 | deny->ld_sop = NULL; | |
2518 | deny->ld_clientid.cl_boot = 0; | |
2519 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
2520 | } |
2521 | deny->ld_start = fl->fl_start; | |
2522 | deny->ld_length = ~(u64)0; | |
2523 | if (fl->fl_end != ~(u64)0) | |
2524 | deny->ld_length = fl->fl_end - fl->fl_start + 1; | |
2525 | deny->ld_type = NFS4_READ_LT; | |
2526 | if (fl->fl_type != F_RDLCK) | |
2527 | deny->ld_type = NFS4_WRITE_LT; | |
2528 | } | |
2529 | ||
1da177e4 LT |
2530 | static struct nfs4_stateowner * |
2531 | find_lockstateowner_str(struct inode *inode, clientid_t *clid, | |
2532 | struct xdr_netobj *owner) | |
2533 | { | |
2534 | unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); | |
2535 | struct nfs4_stateowner *op; | |
2536 | ||
2537 | list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { | |
599e0a22 | 2538 | if (same_owner_str(op, owner, clid)) |
1da177e4 LT |
2539 | return op; |
2540 | } | |
2541 | return NULL; | |
2542 | } | |
2543 | ||
2544 | /* | |
2545 | * Alloc a lock owner structure. | |
2546 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
2547 | * occured. | |
2548 | * | |
2549 | * strhashval = lock_ownerstr_hashval | |
1da177e4 LT |
2550 | */ |
2551 | ||
2552 | static struct nfs4_stateowner * | |
2553 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { | |
2554 | struct nfs4_stateowner *sop; | |
2555 | struct nfs4_replay *rp; | |
2556 | unsigned int idhashval; | |
2557 | ||
2558 | if (!(sop = alloc_stateowner(&lock->lk_new_owner))) | |
2559 | return NULL; | |
2560 | idhashval = lockownerid_hashval(current_ownerid); | |
2561 | INIT_LIST_HEAD(&sop->so_idhash); | |
2562 | INIT_LIST_HEAD(&sop->so_strhash); | |
2563 | INIT_LIST_HEAD(&sop->so_perclient); | |
ea1da636 N |
2564 | INIT_LIST_HEAD(&sop->so_stateids); |
2565 | INIT_LIST_HEAD(&sop->so_perstateid); | |
1da177e4 LT |
2566 | INIT_LIST_HEAD(&sop->so_close_lru); /* not used */ |
2567 | sop->so_time = 0; | |
2568 | list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); | |
2569 | list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); | |
ea1da636 | 2570 | list_add(&sop->so_perstateid, &open_stp->st_lockowners); |
1da177e4 LT |
2571 | sop->so_is_open_owner = 0; |
2572 | sop->so_id = current_ownerid++; | |
2573 | sop->so_client = clp; | |
b59e3c0e NB |
2574 | /* It is the openowner seqid that will be incremented in encode in the |
2575 | * case of new lockowners; so increment the lock seqid manually: */ | |
2576 | sop->so_seqid = lock->lk_new_lock_seqid + 1; | |
1da177e4 LT |
2577 | sop->so_confirmed = 1; |
2578 | rp = &sop->so_replay; | |
de1ae286 | 2579 | rp->rp_status = nfserr_serverfault; |
1da177e4 LT |
2580 | rp->rp_buflen = 0; |
2581 | rp->rp_buf = rp->rp_ibuf; | |
2582 | return sop; | |
2583 | } | |
2584 | ||
fd39ca9a | 2585 | static struct nfs4_stateid * |
1da177e4 LT |
2586 | alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) |
2587 | { | |
2588 | struct nfs4_stateid *stp; | |
2589 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); | |
2590 | ||
5ac049ac N |
2591 | stp = nfs4_alloc_stateid(); |
2592 | if (stp == NULL) | |
1da177e4 LT |
2593 | goto out; |
2594 | INIT_LIST_HEAD(&stp->st_hash); | |
2595 | INIT_LIST_HEAD(&stp->st_perfile); | |
ea1da636 N |
2596 | INIT_LIST_HEAD(&stp->st_perstateowner); |
2597 | INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ | |
1da177e4 | 2598 | list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); |
8beefa24 | 2599 | list_add(&stp->st_perfile, &fp->fi_stateids); |
ea1da636 | 2600 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
1da177e4 | 2601 | stp->st_stateowner = sop; |
13cd2184 | 2602 | get_nfs4_file(fp); |
1da177e4 LT |
2603 | stp->st_file = fp; |
2604 | stp->st_stateid.si_boot = boot_time; | |
2605 | stp->st_stateid.si_stateownerid = sop->so_id; | |
2606 | stp->st_stateid.si_fileid = fp->fi_id; | |
2607 | stp->st_stateid.si_generation = 0; | |
2608 | stp->st_vfs_file = open_stp->st_vfs_file; /* FIXME refcount?? */ | |
2609 | stp->st_access_bmap = open_stp->st_access_bmap; | |
2610 | stp->st_deny_bmap = open_stp->st_deny_bmap; | |
4c4cd222 | 2611 | stp->st_openstp = open_stp; |
1da177e4 LT |
2612 | |
2613 | out: | |
2614 | return stp; | |
2615 | } | |
2616 | ||
fd39ca9a | 2617 | static int |
1da177e4 LT |
2618 | check_lock_length(u64 offset, u64 length) |
2619 | { | |
2620 | return ((length == 0) || ((length != ~(u64)0) && | |
2621 | LOFF_OVERFLOW(offset, length))); | |
2622 | } | |
2623 | ||
2624 | /* | |
2625 | * LOCK operation | |
2626 | */ | |
b37ad28b | 2627 | __be32 |
ca364317 | 2628 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 2629 | struct nfsd4_lock *lock) |
1da177e4 | 2630 | { |
3e9e3dbe | 2631 | struct nfs4_stateowner *open_sop = NULL; |
b59e3c0e | 2632 | struct nfs4_stateowner *lock_sop = NULL; |
1da177e4 LT |
2633 | struct nfs4_stateid *lock_stp; |
2634 | struct file *filp; | |
2635 | struct file_lock file_lock; | |
8dc7c311 | 2636 | struct file_lock conflock; |
b37ad28b | 2637 | __be32 status = 0; |
1da177e4 | 2638 | unsigned int strhashval; |
150b3934 | 2639 | unsigned int cmd; |
b8dd7b9a | 2640 | int err; |
1da177e4 LT |
2641 | |
2642 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
2643 | (long long) lock->lk_offset, | |
2644 | (long long) lock->lk_length); | |
2645 | ||
1da177e4 LT |
2646 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
2647 | return nfserr_inval; | |
2648 | ||
ca364317 | 2649 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 2650 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
2651 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
2652 | return status; | |
2653 | } | |
2654 | ||
1da177e4 LT |
2655 | nfs4_lock_state(); |
2656 | ||
2657 | if (lock->lk_is_new) { | |
893f8770 N |
2658 | /* |
2659 | * Client indicates that this is a new lockowner. | |
2660 | * Use open owner and open stateid to create lock owner and | |
2661 | * lock stateid. | |
2662 | */ | |
1da177e4 LT |
2663 | struct nfs4_stateid *open_stp = NULL; |
2664 | struct nfs4_file *fp; | |
2665 | ||
2666 | status = nfserr_stale_clientid; | |
849823c5 | 2667 | if (STALE_CLIENTID(&lock->lk_new_clientid)) |
1da177e4 | 2668 | goto out; |
1da177e4 | 2669 | |
1da177e4 | 2670 | /* validate and update open stateid and open seqid */ |
ca364317 | 2671 | status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
1da177e4 LT |
2672 | lock->lk_new_open_seqid, |
2673 | &lock->lk_new_open_stateid, | |
f3362737 | 2674 | OPEN_STATE, |
3a65588a | 2675 | &lock->lk_replay_owner, &open_stp, |
b59e3c0e | 2676 | lock); |
37515177 | 2677 | if (status) |
1da177e4 | 2678 | goto out; |
3a65588a | 2679 | open_sop = lock->lk_replay_owner; |
1da177e4 LT |
2680 | /* create lockowner and lock stateid */ |
2681 | fp = open_stp->st_file; | |
2682 | strhashval = lock_ownerstr_hashval(fp->fi_inode, | |
2683 | open_sop->so_client->cl_clientid.cl_id, | |
2684 | &lock->v.new.owner); | |
3e9e3dbe N |
2685 | /* XXX: Do we need to check for duplicate stateowners on |
2686 | * the same file, or should they just be allowed (and | |
2687 | * create new stateids)? */ | |
1da177e4 | 2688 | status = nfserr_resource; |
b59e3c0e NB |
2689 | lock_sop = alloc_init_lock_stateowner(strhashval, |
2690 | open_sop->so_client, open_stp, lock); | |
2691 | if (lock_sop == NULL) | |
1da177e4 | 2692 | goto out; |
b59e3c0e | 2693 | lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); |
8a280510 | 2694 | if (lock_stp == NULL) |
1da177e4 | 2695 | goto out; |
1da177e4 LT |
2696 | } else { |
2697 | /* lock (lock owner + lock stateid) already exists */ | |
ca364317 | 2698 | status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
1da177e4 LT |
2699 | lock->lk_old_lock_seqid, |
2700 | &lock->lk_old_lock_stateid, | |
f3362737 | 2701 | LOCK_STATE, |
3a65588a | 2702 | &lock->lk_replay_owner, &lock_stp, lock); |
1da177e4 LT |
2703 | if (status) |
2704 | goto out; | |
3a65588a | 2705 | lock_sop = lock->lk_replay_owner; |
1da177e4 | 2706 | } |
3a65588a | 2707 | /* lock->lk_replay_owner and lock_stp have been created or found */ |
1da177e4 LT |
2708 | filp = lock_stp->st_vfs_file; |
2709 | ||
0dd395dc | 2710 | status = nfserr_grace; |
af558e33 | 2711 | if (locks_in_grace() && !lock->lk_reclaim) |
0dd395dc N |
2712 | goto out; |
2713 | status = nfserr_no_grace; | |
af558e33 | 2714 | if (!locks_in_grace() && lock->lk_reclaim) |
0dd395dc N |
2715 | goto out; |
2716 | ||
1da177e4 LT |
2717 | locks_init_lock(&file_lock); |
2718 | switch (lock->lk_type) { | |
2719 | case NFS4_READ_LT: | |
2720 | case NFS4_READW_LT: | |
2721 | file_lock.fl_type = F_RDLCK; | |
150b3934 | 2722 | cmd = F_SETLK; |
1da177e4 LT |
2723 | break; |
2724 | case NFS4_WRITE_LT: | |
2725 | case NFS4_WRITEW_LT: | |
2726 | file_lock.fl_type = F_WRLCK; | |
150b3934 | 2727 | cmd = F_SETLK; |
1da177e4 LT |
2728 | break; |
2729 | default: | |
2730 | status = nfserr_inval; | |
2731 | goto out; | |
2732 | } | |
b59e3c0e | 2733 | file_lock.fl_owner = (fl_owner_t)lock_sop; |
1da177e4 LT |
2734 | file_lock.fl_pid = current->tgid; |
2735 | file_lock.fl_file = filp; | |
2736 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 2737 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
2738 | |
2739 | file_lock.fl_start = lock->lk_offset; | |
2740 | if ((lock->lk_length == ~(u64)0) || | |
2741 | LOFF_OVERFLOW(lock->lk_offset, lock->lk_length)) | |
2742 | file_lock.fl_end = ~(u64)0; | |
2743 | else | |
2744 | file_lock.fl_end = lock->lk_offset + lock->lk_length - 1; | |
2745 | nfs4_transform_lock_offset(&file_lock); | |
2746 | ||
2747 | /* | |
2748 | * Try to lock the file in the VFS. | |
2749 | * Note: locks.c uses the BKL to protect the inode's lock list. | |
2750 | */ | |
2751 | ||
fd85b817 | 2752 | err = vfs_lock_file(filp, cmd, &file_lock, &conflock); |
b8dd7b9a | 2753 | switch (-err) { |
1da177e4 LT |
2754 | case 0: /* success! */ |
2755 | update_stateid(&lock_stp->st_stateid); | |
2756 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, | |
2757 | sizeof(stateid_t)); | |
b8dd7b9a | 2758 | status = 0; |
eb76b3fd AA |
2759 | break; |
2760 | case (EAGAIN): /* conflock holds conflicting lock */ | |
2761 | status = nfserr_denied; | |
2762 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
2763 | nfs4_set_lock_denied(&conflock, &lock->lk_denied); | |
2764 | break; | |
1da177e4 LT |
2765 | case (EDEADLK): |
2766 | status = nfserr_deadlock; | |
eb76b3fd | 2767 | break; |
1da177e4 | 2768 | default: |
fd85b817 | 2769 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
eb76b3fd AA |
2770 | status = nfserr_resource; |
2771 | break; | |
1da177e4 | 2772 | } |
1da177e4 | 2773 | out: |
8a280510 BF |
2774 | if (status && lock->lk_is_new && lock_sop) |
2775 | release_stateowner(lock_sop); | |
3a65588a BF |
2776 | if (lock->lk_replay_owner) { |
2777 | nfs4_get_stateowner(lock->lk_replay_owner); | |
a4f1706a | 2778 | cstate->replay_owner = lock->lk_replay_owner; |
f2327d9a | 2779 | } |
1da177e4 LT |
2780 | nfs4_unlock_state(); |
2781 | return status; | |
2782 | } | |
2783 | ||
2784 | /* | |
2785 | * LOCKT operation | |
2786 | */ | |
b37ad28b | 2787 | __be32 |
ca364317 BF |
2788 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2789 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
2790 | { |
2791 | struct inode *inode; | |
2792 | struct file file; | |
2793 | struct file_lock file_lock; | |
fd85b817 | 2794 | int error; |
b37ad28b | 2795 | __be32 status; |
1da177e4 | 2796 | |
af558e33 | 2797 | if (locks_in_grace()) |
1da177e4 LT |
2798 | return nfserr_grace; |
2799 | ||
2800 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
2801 | return nfserr_inval; | |
2802 | ||
2803 | lockt->lt_stateowner = NULL; | |
2804 | nfs4_lock_state(); | |
2805 | ||
2806 | status = nfserr_stale_clientid; | |
849823c5 | 2807 | if (STALE_CLIENTID(&lockt->lt_clientid)) |
1da177e4 | 2808 | goto out; |
1da177e4 | 2809 | |
ca364317 | 2810 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) { |
849823c5 | 2811 | dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n"); |
1da177e4 LT |
2812 | if (status == nfserr_symlink) |
2813 | status = nfserr_inval; | |
2814 | goto out; | |
2815 | } | |
2816 | ||
ca364317 | 2817 | inode = cstate->current_fh.fh_dentry->d_inode; |
1da177e4 LT |
2818 | locks_init_lock(&file_lock); |
2819 | switch (lockt->lt_type) { | |
2820 | case NFS4_READ_LT: | |
2821 | case NFS4_READW_LT: | |
2822 | file_lock.fl_type = F_RDLCK; | |
2823 | break; | |
2824 | case NFS4_WRITE_LT: | |
2825 | case NFS4_WRITEW_LT: | |
2826 | file_lock.fl_type = F_WRLCK; | |
2827 | break; | |
2828 | default: | |
2fdada03 | 2829 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
2830 | status = nfserr_inval; |
2831 | goto out; | |
2832 | } | |
2833 | ||
2834 | lockt->lt_stateowner = find_lockstateowner_str(inode, | |
2835 | &lockt->lt_clientid, &lockt->lt_owner); | |
2836 | if (lockt->lt_stateowner) | |
2837 | file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; | |
2838 | file_lock.fl_pid = current->tgid; | |
2839 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 2840 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
2841 | |
2842 | file_lock.fl_start = lockt->lt_offset; | |
2843 | if ((lockt->lt_length == ~(u64)0) || LOFF_OVERFLOW(lockt->lt_offset, lockt->lt_length)) | |
2844 | file_lock.fl_end = ~(u64)0; | |
2845 | else | |
2846 | file_lock.fl_end = lockt->lt_offset + lockt->lt_length - 1; | |
2847 | ||
2848 | nfs4_transform_lock_offset(&file_lock); | |
2849 | ||
fd85b817 | 2850 | /* vfs_test_lock uses the struct file _only_ to resolve the inode. |
1da177e4 | 2851 | * since LOCKT doesn't require an OPEN, and therefore a struct |
fd85b817 | 2852 | * file may not exist, pass vfs_test_lock a struct file with |
1da177e4 LT |
2853 | * only the dentry:inode set. |
2854 | */ | |
2855 | memset(&file, 0, sizeof (struct file)); | |
ca364317 | 2856 | file.f_path.dentry = cstate->current_fh.fh_dentry; |
1da177e4 LT |
2857 | |
2858 | status = nfs_ok; | |
fd85b817 ME |
2859 | error = vfs_test_lock(&file, &file_lock); |
2860 | if (error) { | |
2861 | status = nfserrno(error); | |
2862 | goto out; | |
2863 | } | |
9d6a8c5c | 2864 | if (file_lock.fl_type != F_UNLCK) { |
1da177e4 | 2865 | status = nfserr_denied; |
9d6a8c5c | 2866 | nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); |
1da177e4 LT |
2867 | } |
2868 | out: | |
2869 | nfs4_unlock_state(); | |
2870 | return status; | |
2871 | } | |
2872 | ||
b37ad28b | 2873 | __be32 |
ca364317 | 2874 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 2875 | struct nfsd4_locku *locku) |
1da177e4 LT |
2876 | { |
2877 | struct nfs4_stateid *stp; | |
2878 | struct file *filp = NULL; | |
2879 | struct file_lock file_lock; | |
b37ad28b | 2880 | __be32 status; |
b8dd7b9a | 2881 | int err; |
1da177e4 LT |
2882 | |
2883 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", | |
2884 | (long long) locku->lu_offset, | |
2885 | (long long) locku->lu_length); | |
2886 | ||
2887 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
2888 | return nfserr_inval; | |
2889 | ||
2890 | nfs4_lock_state(); | |
2891 | ||
ca364317 | 2892 | if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
1da177e4 LT |
2893 | locku->lu_seqid, |
2894 | &locku->lu_stateid, | |
f3362737 | 2895 | LOCK_STATE, |
1da177e4 LT |
2896 | &locku->lu_stateowner, &stp, NULL))) |
2897 | goto out; | |
2898 | ||
2899 | filp = stp->st_vfs_file; | |
2900 | BUG_ON(!filp); | |
2901 | locks_init_lock(&file_lock); | |
2902 | file_lock.fl_type = F_UNLCK; | |
2903 | file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; | |
2904 | file_lock.fl_pid = current->tgid; | |
2905 | file_lock.fl_file = filp; | |
2906 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 2907 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
2908 | file_lock.fl_start = locku->lu_offset; |
2909 | ||
2910 | if ((locku->lu_length == ~(u64)0) || LOFF_OVERFLOW(locku->lu_offset, locku->lu_length)) | |
2911 | file_lock.fl_end = ~(u64)0; | |
2912 | else | |
2913 | file_lock.fl_end = locku->lu_offset + locku->lu_length - 1; | |
2914 | nfs4_transform_lock_offset(&file_lock); | |
2915 | ||
2916 | /* | |
2917 | * Try to unlock the file in the VFS. | |
2918 | */ | |
fd85b817 | 2919 | err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); |
b8dd7b9a | 2920 | if (err) { |
fd85b817 | 2921 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
2922 | goto out_nfserr; |
2923 | } | |
2924 | /* | |
2925 | * OK, unlock succeeded; the only thing left to do is update the stateid. | |
2926 | */ | |
2927 | update_stateid(&stp->st_stateid); | |
2928 | memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2929 | ||
2930 | out: | |
f2327d9a | 2931 | if (locku->lu_stateowner) { |
1da177e4 | 2932 | nfs4_get_stateowner(locku->lu_stateowner); |
a4f1706a | 2933 | cstate->replay_owner = locku->lu_stateowner; |
f2327d9a | 2934 | } |
1da177e4 LT |
2935 | nfs4_unlock_state(); |
2936 | return status; | |
2937 | ||
2938 | out_nfserr: | |
b8dd7b9a | 2939 | status = nfserrno(err); |
1da177e4 LT |
2940 | goto out; |
2941 | } | |
2942 | ||
2943 | /* | |
2944 | * returns | |
2945 | * 1: locks held by lockowner | |
2946 | * 0: no locks held by lockowner | |
2947 | */ | |
2948 | static int | |
2949 | check_for_locks(struct file *filp, struct nfs4_stateowner *lowner) | |
2950 | { | |
2951 | struct file_lock **flpp; | |
7eaa36e2 | 2952 | struct inode *inode = filp->f_path.dentry->d_inode; |
1da177e4 LT |
2953 | int status = 0; |
2954 | ||
2955 | lock_kernel(); | |
2956 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { | |
796dadfd | 2957 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
2958 | status = 1; |
2959 | goto out; | |
796dadfd | 2960 | } |
1da177e4 LT |
2961 | } |
2962 | out: | |
2963 | unlock_kernel(); | |
2964 | return status; | |
2965 | } | |
2966 | ||
b37ad28b | 2967 | __be32 |
b591480b BF |
2968 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
2969 | struct nfsd4_compound_state *cstate, | |
2970 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
2971 | { |
2972 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe N |
2973 | struct nfs4_stateowner *sop; |
2974 | struct nfs4_stateid *stp; | |
1da177e4 | 2975 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe N |
2976 | struct list_head matches; |
2977 | int i; | |
b37ad28b | 2978 | __be32 status; |
1da177e4 LT |
2979 | |
2980 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
2981 | clid->cl_boot, clid->cl_id); | |
2982 | ||
2983 | /* XXX check for lease expiration */ | |
2984 | ||
2985 | status = nfserr_stale_clientid; | |
849823c5 | 2986 | if (STALE_CLIENTID(clid)) |
1da177e4 | 2987 | return status; |
1da177e4 LT |
2988 | |
2989 | nfs4_lock_state(); | |
2990 | ||
3e9e3dbe N |
2991 | status = nfserr_locks_held; |
2992 | /* XXX: we're doing a linear search through all the lockowners. | |
2993 | * Yipes! For now we'll just hope clients aren't really using | |
2994 | * release_lockowner much, but eventually we have to fix these | |
2995 | * data structures. */ | |
2996 | INIT_LIST_HEAD(&matches); | |
2997 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
2998 | list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { | |
599e0a22 | 2999 | if (!same_owner_str(sop, owner, clid)) |
3e9e3dbe N |
3000 | continue; |
3001 | list_for_each_entry(stp, &sop->so_stateids, | |
3002 | st_perstateowner) { | |
3003 | if (check_for_locks(stp->st_vfs_file, sop)) | |
3004 | goto out; | |
3005 | /* Note: so_perclient unused for lockowners, | |
3006 | * so it's OK to fool with here. */ | |
3007 | list_add(&sop->so_perclient, &matches); | |
3008 | } | |
1da177e4 | 3009 | } |
3e9e3dbe N |
3010 | } |
3011 | /* Clients probably won't expect us to return with some (but not all) | |
3012 | * of the lockowner state released; so don't release any until all | |
3013 | * have been checked. */ | |
3014 | status = nfs_ok; | |
0fa822e4 N |
3015 | while (!list_empty(&matches)) { |
3016 | sop = list_entry(matches.next, struct nfs4_stateowner, | |
3017 | so_perclient); | |
3018 | /* unhash_stateowner deletes so_perclient only | |
3019 | * for openowners. */ | |
3020 | list_del(&sop->so_perclient); | |
3e9e3dbe | 3021 | release_stateowner(sop); |
1da177e4 LT |
3022 | } |
3023 | out: | |
3024 | nfs4_unlock_state(); | |
3025 | return status; | |
3026 | } | |
3027 | ||
3028 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 3029 | alloc_reclaim(void) |
1da177e4 | 3030 | { |
a55370a3 | 3031 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
3032 | } |
3033 | ||
c7b9a459 N |
3034 | int |
3035 | nfs4_has_reclaimed_state(const char *name) | |
3036 | { | |
3037 | unsigned int strhashval = clientstr_hashval(name); | |
3038 | struct nfs4_client *clp; | |
3039 | ||
3040 | clp = find_confirmed_client_by_str(name, strhashval); | |
3041 | return clp ? 1 : 0; | |
3042 | } | |
3043 | ||
1da177e4 LT |
3044 | /* |
3045 | * failure => all reset bets are off, nfserr_no_grace... | |
3046 | */ | |
190e4fbf N |
3047 | int |
3048 | nfs4_client_to_reclaim(const char *name) | |
1da177e4 LT |
3049 | { |
3050 | unsigned int strhashval; | |
3051 | struct nfs4_client_reclaim *crp = NULL; | |
3052 | ||
a55370a3 N |
3053 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
3054 | crp = alloc_reclaim(); | |
1da177e4 LT |
3055 | if (!crp) |
3056 | return 0; | |
a55370a3 | 3057 | strhashval = clientstr_hashval(name); |
1da177e4 LT |
3058 | INIT_LIST_HEAD(&crp->cr_strhash); |
3059 | list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); | |
a55370a3 | 3060 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
1da177e4 LT |
3061 | reclaim_str_hashtbl_size++; |
3062 | return 1; | |
3063 | } | |
3064 | ||
3065 | static void | |
3066 | nfs4_release_reclaim(void) | |
3067 | { | |
3068 | struct nfs4_client_reclaim *crp = NULL; | |
3069 | int i; | |
3070 | ||
1da177e4 LT |
3071 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
3072 | while (!list_empty(&reclaim_str_hashtbl[i])) { | |
3073 | crp = list_entry(reclaim_str_hashtbl[i].next, | |
3074 | struct nfs4_client_reclaim, cr_strhash); | |
3075 | list_del(&crp->cr_strhash); | |
1da177e4 LT |
3076 | kfree(crp); |
3077 | reclaim_str_hashtbl_size--; | |
3078 | } | |
3079 | } | |
3080 | BUG_ON(reclaim_str_hashtbl_size); | |
3081 | } | |
3082 | ||
3083 | /* | |
3084 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
fd39ca9a | 3085 | static struct nfs4_client_reclaim * |
1da177e4 LT |
3086 | nfs4_find_reclaim_client(clientid_t *clid) |
3087 | { | |
3088 | unsigned int strhashval; | |
3089 | struct nfs4_client *clp; | |
3090 | struct nfs4_client_reclaim *crp = NULL; | |
3091 | ||
3092 | ||
3093 | /* find clientid in conf_id_hashtbl */ | |
3094 | clp = find_confirmed_client(clid); | |
3095 | if (clp == NULL) | |
3096 | return NULL; | |
3097 | ||
a55370a3 N |
3098 | dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", |
3099 | clp->cl_name.len, clp->cl_name.data, | |
3100 | clp->cl_recdir); | |
1da177e4 LT |
3101 | |
3102 | /* find clp->cl_name in reclaim_str_hashtbl */ | |
a55370a3 | 3103 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 | 3104 | list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { |
a55370a3 | 3105 | if (same_name(crp->cr_recdir, clp->cl_recdir)) { |
1da177e4 LT |
3106 | return crp; |
3107 | } | |
3108 | } | |
3109 | return NULL; | |
3110 | } | |
3111 | ||
3112 | /* | |
3113 | * Called from OPEN. Look for clientid in reclaim list. | |
3114 | */ | |
b37ad28b | 3115 | __be32 |
1da177e4 LT |
3116 | nfs4_check_open_reclaim(clientid_t *clid) |
3117 | { | |
dfc83565 | 3118 | return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; |
1da177e4 LT |
3119 | } |
3120 | ||
ac4d8ff2 | 3121 | /* initialization to perform at module load time: */ |
1da177e4 | 3122 | |
e8ff2a84 | 3123 | int |
ac4d8ff2 | 3124 | nfs4_state_init(void) |
1da177e4 | 3125 | { |
e8ff2a84 | 3126 | int i, status; |
1da177e4 | 3127 | |
e8ff2a84 BF |
3128 | status = nfsd4_init_slabs(); |
3129 | if (status) | |
3130 | return status; | |
1da177e4 LT |
3131 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
3132 | INIT_LIST_HEAD(&conf_id_hashtbl[i]); | |
3133 | INIT_LIST_HEAD(&conf_str_hashtbl[i]); | |
3134 | INIT_LIST_HEAD(&unconf_str_hashtbl[i]); | |
3135 | INIT_LIST_HEAD(&unconf_id_hashtbl[i]); | |
3136 | } | |
3137 | for (i = 0; i < FILE_HASH_SIZE; i++) { | |
3138 | INIT_LIST_HEAD(&file_hashtbl[i]); | |
3139 | } | |
3140 | for (i = 0; i < OWNER_HASH_SIZE; i++) { | |
3141 | INIT_LIST_HEAD(&ownerstr_hashtbl[i]); | |
3142 | INIT_LIST_HEAD(&ownerid_hashtbl[i]); | |
3143 | } | |
3144 | for (i = 0; i < STATEID_HASH_SIZE; i++) { | |
3145 | INIT_LIST_HEAD(&stateid_hashtbl[i]); | |
3146 | INIT_LIST_HEAD(&lockstateid_hashtbl[i]); | |
3147 | } | |
3148 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
3149 | INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); | |
3150 | INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); | |
3151 | } | |
1da177e4 | 3152 | memset(&onestateid, ~0, sizeof(stateid_t)); |
1da177e4 LT |
3153 | INIT_LIST_HEAD(&close_lru); |
3154 | INIT_LIST_HEAD(&client_lru); | |
3155 | INIT_LIST_HEAD(&del_recall_lru); | |
ac4d8ff2 N |
3156 | for (i = 0; i < CLIENT_HASH_SIZE; i++) |
3157 | INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); | |
3158 | reclaim_str_hashtbl_size = 0; | |
e8ff2a84 | 3159 | return 0; |
ac4d8ff2 N |
3160 | } |
3161 | ||
190e4fbf N |
3162 | static void |
3163 | nfsd4_load_reboot_recovery_data(void) | |
3164 | { | |
3165 | int status; | |
3166 | ||
0964a3d3 N |
3167 | nfs4_lock_state(); |
3168 | nfsd4_init_recdir(user_recovery_dirname); | |
190e4fbf | 3169 | status = nfsd4_recdir_load(); |
0964a3d3 | 3170 | nfs4_unlock_state(); |
190e4fbf N |
3171 | if (status) |
3172 | printk("NFSD: Failure reading reboot recovery data\n"); | |
3173 | } | |
3174 | ||
9a8db97e ME |
3175 | unsigned long |
3176 | get_nfs4_grace_period(void) | |
3177 | { | |
3178 | return max(user_lease_time, lease_time) * HZ; | |
3179 | } | |
3180 | ||
c2f1a551 MS |
3181 | /* |
3182 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
3183 | * client may quite reasonably hang on to a delegation as long as it has | |
3184 | * the inode cached. This becomes an obvious problem the first time a | |
3185 | * client's inode cache approaches the size of the server's total memory. | |
3186 | * | |
3187 | * For now we avoid this problem by imposing a hard limit on the number | |
3188 | * of delegations, which varies according to the server's memory size. | |
3189 | */ | |
3190 | static void | |
3191 | set_max_delegations(void) | |
3192 | { | |
3193 | /* | |
3194 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
3195 | * estimates suggest that in the worst case (where every delegation | |
3196 | * is for a different inode), a delegation could take about 1.5K, | |
3197 | * giving a worst case usage of about 6% of memory. | |
3198 | */ | |
3199 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
3200 | } | |
3201 | ||
ac4d8ff2 N |
3202 | /* initialization to perform when the nfsd service is started: */ |
3203 | ||
3204 | static void | |
3205 | __nfs4_state_start(void) | |
3206 | { | |
9a8db97e | 3207 | unsigned long grace_time; |
ac4d8ff2 | 3208 | |
1da177e4 | 3209 | boot_time = get_seconds(); |
af558e33 | 3210 | grace_time = get_nfs4_grace_period(); |
d99a05ad | 3211 | lease_time = user_lease_time; |
af558e33 | 3212 | locks_start_grace(&nfsd4_manager); |
9a8db97e ME |
3213 | printk(KERN_INFO "NFSD: starting %ld-second grace period\n", |
3214 | grace_time/HZ); | |
58da282b | 3215 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
9a8db97e | 3216 | queue_delayed_work(laundry_wq, &laundromat_work, grace_time); |
c2f1a551 | 3217 | set_max_delegations(); |
1da177e4 LT |
3218 | } |
3219 | ||
e8ff2a84 | 3220 | void |
76a3550e | 3221 | nfs4_state_start(void) |
1da177e4 | 3222 | { |
1da177e4 | 3223 | if (nfs4_init) |
e8ff2a84 | 3224 | return; |
190e4fbf | 3225 | nfsd4_load_reboot_recovery_data(); |
76a3550e | 3226 | __nfs4_state_start(); |
1da177e4 | 3227 | nfs4_init = 1; |
e8ff2a84 | 3228 | return; |
1da177e4 LT |
3229 | } |
3230 | ||
1da177e4 LT |
3231 | time_t |
3232 | nfs4_lease_time(void) | |
3233 | { | |
3234 | return lease_time; | |
3235 | } | |
3236 | ||
3237 | static void | |
3238 | __nfs4_state_shutdown(void) | |
3239 | { | |
3240 | int i; | |
3241 | struct nfs4_client *clp = NULL; | |
3242 | struct nfs4_delegation *dp = NULL; | |
1da177e4 LT |
3243 | struct list_head *pos, *next, reaplist; |
3244 | ||
1da177e4 LT |
3245 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
3246 | while (!list_empty(&conf_id_hashtbl[i])) { | |
3247 | clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
3248 | expire_client(clp); | |
3249 | } | |
3250 | while (!list_empty(&unconf_str_hashtbl[i])) { | |
3251 | clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); | |
3252 | expire_client(clp); | |
3253 | } | |
3254 | } | |
3255 | INIT_LIST_HEAD(&reaplist); | |
3256 | spin_lock(&recall_lock); | |
3257 | list_for_each_safe(pos, next, &del_recall_lru) { | |
3258 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3259 | list_move(&dp->dl_recall_lru, &reaplist); | |
3260 | } | |
3261 | spin_unlock(&recall_lock); | |
3262 | list_for_each_safe(pos, next, &reaplist) { | |
3263 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3264 | list_del_init(&dp->dl_recall_lru); | |
3265 | unhash_delegation(dp); | |
3266 | } | |
3267 | ||
190e4fbf | 3268 | nfsd4_shutdown_recdir(); |
1da177e4 | 3269 | nfs4_init = 0; |
1da177e4 LT |
3270 | } |
3271 | ||
3272 | void | |
3273 | nfs4_state_shutdown(void) | |
3274 | { | |
5e8d5c29 N |
3275 | cancel_rearming_delayed_workqueue(laundry_wq, &laundromat_work); |
3276 | destroy_workqueue(laundry_wq); | |
2c5e7615 | 3277 | locks_end_grace(&nfsd4_manager); |
1da177e4 LT |
3278 | nfs4_lock_state(); |
3279 | nfs4_release_reclaim(); | |
3280 | __nfs4_state_shutdown(); | |
1da177e4 LT |
3281 | nfs4_unlock_state(); |
3282 | } | |
3283 | ||
3dd98a3b JL |
3284 | /* |
3285 | * user_recovery_dirname is protected by the nfsd_mutex since it's only | |
3286 | * accessed when nfsd is starting. | |
3287 | */ | |
0964a3d3 N |
3288 | static void |
3289 | nfs4_set_recdir(char *recdir) | |
3290 | { | |
0964a3d3 | 3291 | strcpy(user_recovery_dirname, recdir); |
0964a3d3 N |
3292 | } |
3293 | ||
3294 | /* | |
3295 | * Change the NFSv4 recovery directory to recdir. | |
3296 | */ | |
3297 | int | |
3298 | nfs4_reset_recoverydir(char *recdir) | |
3299 | { | |
3300 | int status; | |
a63bb996 | 3301 | struct path path; |
0964a3d3 | 3302 | |
a63bb996 | 3303 | status = kern_path(recdir, LOOKUP_FOLLOW, &path); |
0964a3d3 N |
3304 | if (status) |
3305 | return status; | |
3306 | status = -ENOTDIR; | |
a63bb996 | 3307 | if (S_ISDIR(path.dentry->d_inode->i_mode)) { |
0964a3d3 N |
3308 | nfs4_set_recdir(recdir); |
3309 | status = 0; | |
3310 | } | |
a63bb996 | 3311 | path_put(&path); |
0964a3d3 N |
3312 | return status; |
3313 | } | |
3314 | ||
3dd98a3b JL |
3315 | char * |
3316 | nfs4_recoverydir(void) | |
3317 | { | |
3318 | return user_recovery_dirname; | |
3319 | } | |
3320 | ||
1da177e4 LT |
3321 | /* |
3322 | * Called when leasetime is changed. | |
3323 | * | |
d99a05ad N |
3324 | * The only way the protocol gives us to handle on-the-fly lease changes is to |
3325 | * simulate a reboot. Instead of doing that, we just wait till the next time | |
3326 | * we start to register any changes in lease time. If the administrator | |
3327 | * really wants to change the lease time *now*, they can go ahead and bring | |
3328 | * nfsd down and then back up again after changing the lease time. | |
3dd98a3b JL |
3329 | * |
3330 | * user_lease_time is protected by nfsd_mutex since it's only really accessed | |
3331 | * when nfsd is starting | |
1da177e4 LT |
3332 | */ |
3333 | void | |
3334 | nfs4_reset_lease(time_t leasetime) | |
3335 | { | |
d99a05ad | 3336 | user_lease_time = leasetime; |
1da177e4 | 3337 | } |