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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * linux/fs/nfsd/nfs4state.c | |
3 | * | |
4 | * Copyright (c) 2001 The Regents of the University of Michigan. | |
5 | * All rights reserved. | |
6 | * | |
7 | * Kendrick Smith <kmsmith@umich.edu> | |
8 | * Andy Adamson <kandros@umich.edu> | |
9 | * | |
10 | * Redistribution and use in source and binary forms, with or without | |
11 | * modification, are permitted provided that the following conditions | |
12 | * are met: | |
13 | * | |
14 | * 1. Redistributions of source code must retain the above copyright | |
15 | * notice, this list of conditions and the following disclaimer. | |
16 | * 2. Redistributions in binary form must reproduce the above copyright | |
17 | * notice, this list of conditions and the following disclaimer in the | |
18 | * documentation and/or other materials provided with the distribution. | |
19 | * 3. Neither the name of the University nor the names of its | |
20 | * contributors may be used to endorse or promote products derived | |
21 | * from this software without specific prior written permission. | |
22 | * | |
23 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
24 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
25 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
26 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
27 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
28 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
29 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
30 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
31 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
32 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
33 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
34 | * | |
35 | */ | |
36 | ||
37 | #include <linux/param.h> | |
38 | #include <linux/major.h> | |
39 | #include <linux/slab.h> | |
40 | ||
41 | #include <linux/sunrpc/svc.h> | |
42 | #include <linux/nfsd/nfsd.h> | |
43 | #include <linux/nfsd/cache.h> | |
44 | #include <linux/mount.h> | |
45 | #include <linux/workqueue.h> | |
46 | #include <linux/smp_lock.h> | |
47 | #include <linux/kthread.h> | |
48 | #include <linux/nfs4.h> | |
49 | #include <linux/nfsd/state.h> | |
50 | #include <linux/nfsd/xdr4.h> | |
0964a3d3 | 51 | #include <linux/namei.h> |
353ab6e9 | 52 | #include <linux/mutex.h> |
1da177e4 LT |
53 | |
54 | #define NFSDDBG_FACILITY NFSDDBG_PROC | |
55 | ||
56 | /* Globals */ | |
57 | static time_t lease_time = 90; /* default lease time */ | |
d99a05ad | 58 | static time_t user_lease_time = 90; |
fd39ca9a | 59 | static time_t boot_time; |
a76b4319 | 60 | static int in_grace = 1; |
1da177e4 LT |
61 | static u32 current_clientid = 1; |
62 | static u32 current_ownerid = 1; | |
63 | static u32 current_fileid = 1; | |
64 | static u32 current_delegid = 1; | |
65 | static u32 nfs4_init; | |
fd39ca9a N |
66 | static stateid_t zerostateid; /* bits all 0 */ |
67 | static stateid_t onestateid; /* bits all 1 */ | |
68 | ||
69 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t))) | |
70 | #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t))) | |
1da177e4 | 71 | |
1da177e4 | 72 | /* forward declarations */ |
fd39ca9a | 73 | static struct nfs4_stateid * find_stateid(stateid_t *stid, int flags); |
1da177e4 LT |
74 | static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid); |
75 | static void release_stateid_lockowners(struct nfs4_stateid *open_stp); | |
0964a3d3 N |
76 | static char user_recovery_dirname[PATH_MAX] = "/var/lib/nfs/v4recovery"; |
77 | static void nfs4_set_recdir(char *recdir); | |
1da177e4 LT |
78 | |
79 | /* Locking: | |
80 | * | |
353ab6e9 | 81 | * client_mutex: |
1da177e4 LT |
82 | * protects clientid_hashtbl[], clientstr_hashtbl[], |
83 | * unconfstr_hashtbl[], uncofid_hashtbl[]. | |
84 | */ | |
353ab6e9 | 85 | static DEFINE_MUTEX(client_mutex); |
1da177e4 | 86 | |
fd39ca9a N |
87 | static kmem_cache_t *stateowner_slab = NULL; |
88 | static kmem_cache_t *file_slab = NULL; | |
89 | static kmem_cache_t *stateid_slab = NULL; | |
90 | static kmem_cache_t *deleg_slab = NULL; | |
e60d4398 | 91 | |
1da177e4 LT |
92 | void |
93 | nfs4_lock_state(void) | |
94 | { | |
353ab6e9 | 95 | mutex_lock(&client_mutex); |
1da177e4 LT |
96 | } |
97 | ||
98 | void | |
99 | nfs4_unlock_state(void) | |
100 | { | |
353ab6e9 | 101 | mutex_unlock(&client_mutex); |
1da177e4 LT |
102 | } |
103 | ||
104 | static inline u32 | |
105 | opaque_hashval(const void *ptr, int nbytes) | |
106 | { | |
107 | unsigned char *cptr = (unsigned char *) ptr; | |
108 | ||
109 | u32 x = 0; | |
110 | while (nbytes--) { | |
111 | x *= 37; | |
112 | x += *cptr++; | |
113 | } | |
114 | return x; | |
115 | } | |
116 | ||
117 | /* forward declarations */ | |
118 | static void release_stateowner(struct nfs4_stateowner *sop); | |
119 | static void release_stateid(struct nfs4_stateid *stp, int flags); | |
1da177e4 LT |
120 | |
121 | /* | |
122 | * Delegation state | |
123 | */ | |
124 | ||
125 | /* recall_lock protects the del_recall_lru */ | |
34af946a | 126 | static DEFINE_SPINLOCK(recall_lock); |
1da177e4 LT |
127 | static struct list_head del_recall_lru; |
128 | ||
13cd2184 N |
129 | static void |
130 | free_nfs4_file(struct kref *kref) | |
131 | { | |
132 | struct nfs4_file *fp = container_of(kref, struct nfs4_file, fi_ref); | |
133 | list_del(&fp->fi_hash); | |
134 | iput(fp->fi_inode); | |
135 | kmem_cache_free(file_slab, fp); | |
136 | } | |
137 | ||
138 | static inline void | |
139 | put_nfs4_file(struct nfs4_file *fi) | |
140 | { | |
141 | kref_put(&fi->fi_ref, free_nfs4_file); | |
142 | } | |
143 | ||
144 | static inline void | |
145 | get_nfs4_file(struct nfs4_file *fi) | |
146 | { | |
147 | kref_get(&fi->fi_ref); | |
148 | } | |
149 | ||
ef0f3390 N |
150 | static int num_delegations; |
151 | ||
152 | /* | |
153 | * Open owner state (share locks) | |
154 | */ | |
155 | ||
156 | /* hash tables for nfs4_stateowner */ | |
157 | #define OWNER_HASH_BITS 8 | |
158 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
159 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
160 | ||
161 | #define ownerid_hashval(id) \ | |
162 | ((id) & OWNER_HASH_MASK) | |
163 | #define ownerstr_hashval(clientid, ownername) \ | |
164 | (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK) | |
165 | ||
166 | static struct list_head ownerid_hashtbl[OWNER_HASH_SIZE]; | |
167 | static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; | |
168 | ||
169 | /* hash table for nfs4_file */ | |
170 | #define FILE_HASH_BITS 8 | |
171 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
172 | #define FILE_HASH_MASK (FILE_HASH_SIZE - 1) | |
173 | /* hash table for (open)nfs4_stateid */ | |
174 | #define STATEID_HASH_BITS 10 | |
175 | #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS) | |
176 | #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1) | |
177 | ||
178 | #define file_hashval(x) \ | |
179 | hash_ptr(x, FILE_HASH_BITS) | |
180 | #define stateid_hashval(owner_id, file_id) \ | |
181 | (((owner_id) + (file_id)) & STATEID_HASH_MASK) | |
182 | ||
183 | static struct list_head file_hashtbl[FILE_HASH_SIZE]; | |
184 | static struct list_head stateid_hashtbl[STATEID_HASH_SIZE]; | |
185 | ||
1da177e4 LT |
186 | static struct nfs4_delegation * |
187 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type) | |
188 | { | |
189 | struct nfs4_delegation *dp; | |
190 | struct nfs4_file *fp = stp->st_file; | |
191 | struct nfs4_callback *cb = &stp->st_stateowner->so_client->cl_callback; | |
192 | ||
193 | dprintk("NFSD alloc_init_deleg\n"); | |
ef0f3390 N |
194 | if (num_delegations > STATEID_HASH_SIZE * 4) |
195 | return NULL; | |
5b2d21c1 N |
196 | dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); |
197 | if (dp == NULL) | |
1da177e4 | 198 | return dp; |
ef0f3390 | 199 | num_delegations++; |
ea1da636 N |
200 | INIT_LIST_HEAD(&dp->dl_perfile); |
201 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 LT |
202 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
203 | dp->dl_client = clp; | |
13cd2184 | 204 | get_nfs4_file(fp); |
1da177e4 LT |
205 | dp->dl_file = fp; |
206 | dp->dl_flock = NULL; | |
207 | get_file(stp->st_vfs_file); | |
208 | dp->dl_vfs_file = stp->st_vfs_file; | |
209 | dp->dl_type = type; | |
210 | dp->dl_recall.cbr_dp = NULL; | |
211 | dp->dl_recall.cbr_ident = cb->cb_ident; | |
212 | dp->dl_recall.cbr_trunc = 0; | |
213 | dp->dl_stateid.si_boot = boot_time; | |
214 | dp->dl_stateid.si_stateownerid = current_delegid++; | |
215 | dp->dl_stateid.si_fileid = 0; | |
216 | dp->dl_stateid.si_generation = 0; | |
217 | dp->dl_fhlen = current_fh->fh_handle.fh_size; | |
218 | memcpy(dp->dl_fhval, ¤t_fh->fh_handle.fh_base, | |
219 | current_fh->fh_handle.fh_size); | |
220 | dp->dl_time = 0; | |
221 | atomic_set(&dp->dl_count, 1); | |
ea1da636 N |
222 | list_add(&dp->dl_perfile, &fp->fi_delegations); |
223 | list_add(&dp->dl_perclnt, &clp->cl_delegations); | |
1da177e4 LT |
224 | return dp; |
225 | } | |
226 | ||
227 | void | |
228 | nfs4_put_delegation(struct nfs4_delegation *dp) | |
229 | { | |
230 | if (atomic_dec_and_test(&dp->dl_count)) { | |
231 | dprintk("NFSD: freeing dp %p\n",dp); | |
13cd2184 | 232 | put_nfs4_file(dp->dl_file); |
5b2d21c1 | 233 | kmem_cache_free(deleg_slab, dp); |
ef0f3390 | 234 | num_delegations--; |
1da177e4 LT |
235 | } |
236 | } | |
237 | ||
238 | /* Remove the associated file_lock first, then remove the delegation. | |
239 | * lease_modify() is called to remove the FS_LEASE file_lock from | |
240 | * the i_flock list, eventually calling nfsd's lock_manager | |
241 | * fl_release_callback. | |
242 | */ | |
243 | static void | |
244 | nfs4_close_delegation(struct nfs4_delegation *dp) | |
245 | { | |
246 | struct file *filp = dp->dl_vfs_file; | |
247 | ||
248 | dprintk("NFSD: close_delegation dp %p\n",dp); | |
249 | dp->dl_vfs_file = NULL; | |
250 | /* The following nfsd_close may not actually close the file, | |
251 | * but we want to remove the lease in any case. */ | |
c907132d N |
252 | if (dp->dl_flock) |
253 | setlease(filp, F_UNLCK, &dp->dl_flock); | |
1da177e4 | 254 | nfsd_close(filp); |
1da177e4 LT |
255 | } |
256 | ||
257 | /* Called under the state lock. */ | |
258 | static void | |
259 | unhash_delegation(struct nfs4_delegation *dp) | |
260 | { | |
ea1da636 N |
261 | list_del_init(&dp->dl_perfile); |
262 | list_del_init(&dp->dl_perclnt); | |
1da177e4 LT |
263 | spin_lock(&recall_lock); |
264 | list_del_init(&dp->dl_recall_lru); | |
265 | spin_unlock(&recall_lock); | |
266 | nfs4_close_delegation(dp); | |
267 | nfs4_put_delegation(dp); | |
268 | } | |
269 | ||
270 | /* | |
271 | * SETCLIENTID state | |
272 | */ | |
273 | ||
274 | /* Hash tables for nfs4_clientid state */ | |
275 | #define CLIENT_HASH_BITS 4 | |
276 | #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) | |
277 | #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) | |
278 | ||
279 | #define clientid_hashval(id) \ | |
280 | ((id) & CLIENT_HASH_MASK) | |
a55370a3 N |
281 | #define clientstr_hashval(name) \ |
282 | (opaque_hashval((name), 8) & CLIENT_HASH_MASK) | |
1da177e4 LT |
283 | /* |
284 | * reclaim_str_hashtbl[] holds known client info from previous reset/reboot | |
285 | * used in reboot/reset lease grace period processing | |
286 | * | |
287 | * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed | |
288 | * setclientid_confirmed info. | |
289 | * | |
290 | * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed | |
291 | * setclientid info. | |
292 | * | |
293 | * client_lru holds client queue ordered by nfs4_client.cl_time | |
294 | * for lease renewal. | |
295 | * | |
296 | * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time | |
297 | * for last close replay. | |
298 | */ | |
299 | static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; | |
300 | static int reclaim_str_hashtbl_size = 0; | |
301 | static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; | |
302 | static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; | |
303 | static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; | |
304 | static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; | |
305 | static struct list_head client_lru; | |
306 | static struct list_head close_lru; | |
307 | ||
308 | static inline void | |
309 | renew_client(struct nfs4_client *clp) | |
310 | { | |
311 | /* | |
312 | * Move client to the end to the LRU list. | |
313 | */ | |
314 | dprintk("renewing client (clientid %08x/%08x)\n", | |
315 | clp->cl_clientid.cl_boot, | |
316 | clp->cl_clientid.cl_id); | |
317 | list_move_tail(&clp->cl_lru, &client_lru); | |
318 | clp->cl_time = get_seconds(); | |
319 | } | |
320 | ||
321 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ | |
322 | static int | |
323 | STALE_CLIENTID(clientid_t *clid) | |
324 | { | |
325 | if (clid->cl_boot == boot_time) | |
326 | return 0; | |
327 | dprintk("NFSD stale clientid (%08x/%08x)\n", | |
328 | clid->cl_boot, clid->cl_id); | |
329 | return 1; | |
330 | } | |
331 | ||
332 | /* | |
333 | * XXX Should we use a slab cache ? | |
334 | * This type of memory management is somewhat inefficient, but we use it | |
335 | * anyway since SETCLIENTID is not a common operation. | |
336 | */ | |
337 | static inline struct nfs4_client * | |
338 | alloc_client(struct xdr_netobj name) | |
339 | { | |
340 | struct nfs4_client *clp; | |
341 | ||
342 | if ((clp = kmalloc(sizeof(struct nfs4_client), GFP_KERNEL))!= NULL) { | |
343 | memset(clp, 0, sizeof(*clp)); | |
344 | if ((clp->cl_name.data = kmalloc(name.len, GFP_KERNEL)) != NULL) { | |
345 | memcpy(clp->cl_name.data, name.data, name.len); | |
346 | clp->cl_name.len = name.len; | |
347 | } | |
348 | else { | |
349 | kfree(clp); | |
350 | clp = NULL; | |
351 | } | |
352 | } | |
353 | return clp; | |
354 | } | |
355 | ||
356 | static inline void | |
357 | free_client(struct nfs4_client *clp) | |
358 | { | |
359 | if (clp->cl_cred.cr_group_info) | |
360 | put_group_info(clp->cl_cred.cr_group_info); | |
361 | kfree(clp->cl_name.data); | |
362 | kfree(clp); | |
363 | } | |
364 | ||
365 | void | |
366 | put_nfs4_client(struct nfs4_client *clp) | |
367 | { | |
368 | if (atomic_dec_and_test(&clp->cl_count)) | |
369 | free_client(clp); | |
370 | } | |
371 | ||
4e2fd495 N |
372 | static void |
373 | shutdown_callback_client(struct nfs4_client *clp) | |
374 | { | |
375 | struct rpc_clnt *clnt = clp->cl_callback.cb_client; | |
376 | ||
377 | /* shutdown rpc client, ending any outstanding recall rpcs */ | |
378 | if (clnt) { | |
379 | clp->cl_callback.cb_client = NULL; | |
380 | rpc_shutdown_client(clnt); | |
381 | rpciod_down(); | |
382 | } | |
383 | } | |
384 | ||
1da177e4 LT |
385 | static void |
386 | expire_client(struct nfs4_client *clp) | |
387 | { | |
388 | struct nfs4_stateowner *sop; | |
389 | struct nfs4_delegation *dp; | |
1da177e4 LT |
390 | struct list_head reaplist; |
391 | ||
392 | dprintk("NFSD: expire_client cl_count %d\n", | |
393 | atomic_read(&clp->cl_count)); | |
394 | ||
4e2fd495 | 395 | shutdown_callback_client(clp); |
1da177e4 LT |
396 | |
397 | INIT_LIST_HEAD(&reaplist); | |
398 | spin_lock(&recall_lock); | |
ea1da636 N |
399 | while (!list_empty(&clp->cl_delegations)) { |
400 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
1da177e4 LT |
401 | dprintk("NFSD: expire client. dp %p, fp %p\n", dp, |
402 | dp->dl_flock); | |
ea1da636 | 403 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
404 | list_move(&dp->dl_recall_lru, &reaplist); |
405 | } | |
406 | spin_unlock(&recall_lock); | |
407 | while (!list_empty(&reaplist)) { | |
408 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
409 | list_del_init(&dp->dl_recall_lru); | |
410 | unhash_delegation(dp); | |
411 | } | |
412 | list_del(&clp->cl_idhash); | |
413 | list_del(&clp->cl_strhash); | |
414 | list_del(&clp->cl_lru); | |
ea1da636 N |
415 | while (!list_empty(&clp->cl_openowners)) { |
416 | sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient); | |
1da177e4 LT |
417 | release_stateowner(sop); |
418 | } | |
419 | put_nfs4_client(clp); | |
420 | } | |
421 | ||
422 | static struct nfs4_client * | |
a55370a3 | 423 | create_client(struct xdr_netobj name, char *recdir) { |
1da177e4 LT |
424 | struct nfs4_client *clp; |
425 | ||
426 | if (!(clp = alloc_client(name))) | |
427 | goto out; | |
a55370a3 | 428 | memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); |
1da177e4 LT |
429 | atomic_set(&clp->cl_count, 1); |
430 | atomic_set(&clp->cl_callback.cb_set, 0); | |
1da177e4 LT |
431 | INIT_LIST_HEAD(&clp->cl_idhash); |
432 | INIT_LIST_HEAD(&clp->cl_strhash); | |
ea1da636 N |
433 | INIT_LIST_HEAD(&clp->cl_openowners); |
434 | INIT_LIST_HEAD(&clp->cl_delegations); | |
1da177e4 LT |
435 | INIT_LIST_HEAD(&clp->cl_lru); |
436 | out: | |
437 | return clp; | |
438 | } | |
439 | ||
440 | static void | |
441 | copy_verf(struct nfs4_client *target, nfs4_verifier *source) { | |
442 | memcpy(target->cl_verifier.data, source->data, sizeof(target->cl_verifier.data)); | |
443 | } | |
444 | ||
445 | static void | |
446 | copy_clid(struct nfs4_client *target, struct nfs4_client *source) { | |
447 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; | |
448 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
449 | } | |
450 | ||
451 | static void | |
452 | copy_cred(struct svc_cred *target, struct svc_cred *source) { | |
453 | ||
454 | target->cr_uid = source->cr_uid; | |
455 | target->cr_gid = source->cr_gid; | |
456 | target->cr_group_info = source->cr_group_info; | |
457 | get_group_info(target->cr_group_info); | |
458 | } | |
459 | ||
a55370a3 N |
460 | static inline int |
461 | same_name(const char *n1, const char *n2) { | |
462 | return 0 == memcmp(n1, n2, HEXDIR_LEN); | |
1da177e4 LT |
463 | } |
464 | ||
465 | static int | |
466 | cmp_verf(nfs4_verifier *v1, nfs4_verifier *v2) { | |
467 | return(!memcmp(v1->data,v2->data,sizeof(v1->data))); | |
468 | } | |
469 | ||
470 | static int | |
471 | cmp_clid(clientid_t * cl1, clientid_t * cl2) { | |
472 | return((cl1->cl_boot == cl2->cl_boot) && | |
473 | (cl1->cl_id == cl2->cl_id)); | |
474 | } | |
475 | ||
476 | /* XXX what about NGROUP */ | |
477 | static int | |
478 | cmp_creds(struct svc_cred *cr1, struct svc_cred *cr2){ | |
479 | return(cr1->cr_uid == cr2->cr_uid); | |
480 | ||
481 | } | |
482 | ||
483 | static void | |
484 | gen_clid(struct nfs4_client *clp) { | |
485 | clp->cl_clientid.cl_boot = boot_time; | |
486 | clp->cl_clientid.cl_id = current_clientid++; | |
487 | } | |
488 | ||
489 | static void | |
490 | gen_confirm(struct nfs4_client *clp) { | |
491 | struct timespec tv; | |
492 | u32 * p; | |
493 | ||
494 | tv = CURRENT_TIME; | |
495 | p = (u32 *)clp->cl_confirm.data; | |
496 | *p++ = tv.tv_sec; | |
497 | *p++ = tv.tv_nsec; | |
498 | } | |
499 | ||
500 | static int | |
501 | check_name(struct xdr_netobj name) { | |
502 | ||
503 | if (name.len == 0) | |
504 | return 0; | |
505 | if (name.len > NFS4_OPAQUE_LIMIT) { | |
506 | printk("NFSD: check_name: name too long(%d)!\n", name.len); | |
507 | return 0; | |
508 | } | |
509 | return 1; | |
510 | } | |
511 | ||
fd39ca9a | 512 | static void |
1da177e4 LT |
513 | add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) |
514 | { | |
515 | unsigned int idhashval; | |
516 | ||
517 | list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); | |
518 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
519 | list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); | |
520 | list_add_tail(&clp->cl_lru, &client_lru); | |
521 | clp->cl_time = get_seconds(); | |
522 | } | |
523 | ||
fd39ca9a | 524 | static void |
1da177e4 LT |
525 | move_to_confirmed(struct nfs4_client *clp) |
526 | { | |
527 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
528 | unsigned int strhashval; | |
529 | ||
530 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
531 | list_del_init(&clp->cl_strhash); | |
f116629d | 532 | list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); |
a55370a3 | 533 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 LT |
534 | list_add(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); |
535 | renew_client(clp); | |
536 | } | |
537 | ||
538 | static struct nfs4_client * | |
539 | find_confirmed_client(clientid_t *clid) | |
540 | { | |
541 | struct nfs4_client *clp; | |
542 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
543 | ||
544 | list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { | |
545 | if (cmp_clid(&clp->cl_clientid, clid)) | |
546 | return clp; | |
547 | } | |
548 | return NULL; | |
549 | } | |
550 | ||
551 | static struct nfs4_client * | |
552 | find_unconfirmed_client(clientid_t *clid) | |
553 | { | |
554 | struct nfs4_client *clp; | |
555 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
556 | ||
557 | list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { | |
558 | if (cmp_clid(&clp->cl_clientid, clid)) | |
559 | return clp; | |
560 | } | |
561 | return NULL; | |
562 | } | |
563 | ||
28ce6054 N |
564 | static struct nfs4_client * |
565 | find_confirmed_client_by_str(const char *dname, unsigned int hashval) | |
566 | { | |
567 | struct nfs4_client *clp; | |
568 | ||
569 | list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { | |
570 | if (same_name(clp->cl_recdir, dname)) | |
571 | return clp; | |
572 | } | |
573 | return NULL; | |
574 | } | |
575 | ||
576 | static struct nfs4_client * | |
577 | find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) | |
578 | { | |
579 | struct nfs4_client *clp; | |
580 | ||
581 | list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { | |
582 | if (same_name(clp->cl_recdir, dname)) | |
583 | return clp; | |
584 | } | |
585 | return NULL; | |
586 | } | |
587 | ||
1da177e4 LT |
588 | /* a helper function for parse_callback */ |
589 | static int | |
590 | parse_octet(unsigned int *lenp, char **addrp) | |
591 | { | |
592 | unsigned int len = *lenp; | |
593 | char *p = *addrp; | |
594 | int n = -1; | |
595 | char c; | |
596 | ||
597 | for (;;) { | |
598 | if (!len) | |
599 | break; | |
600 | len--; | |
601 | c = *p++; | |
602 | if (c == '.') | |
603 | break; | |
604 | if ((c < '0') || (c > '9')) { | |
605 | n = -1; | |
606 | break; | |
607 | } | |
608 | if (n < 0) | |
609 | n = 0; | |
610 | n = (n * 10) + (c - '0'); | |
611 | if (n > 255) { | |
612 | n = -1; | |
613 | break; | |
614 | } | |
615 | } | |
616 | *lenp = len; | |
617 | *addrp = p; | |
618 | return n; | |
619 | } | |
620 | ||
621 | /* parse and set the setclientid ipv4 callback address */ | |
fd39ca9a | 622 | static int |
1da177e4 LT |
623 | parse_ipv4(unsigned int addr_len, char *addr_val, unsigned int *cbaddrp, unsigned short *cbportp) |
624 | { | |
625 | int temp = 0; | |
626 | u32 cbaddr = 0; | |
627 | u16 cbport = 0; | |
628 | u32 addrlen = addr_len; | |
629 | char *addr = addr_val; | |
630 | int i, shift; | |
631 | ||
632 | /* ipaddress */ | |
633 | shift = 24; | |
634 | for(i = 4; i > 0 ; i--) { | |
635 | if ((temp = parse_octet(&addrlen, &addr)) < 0) { | |
636 | return 0; | |
637 | } | |
638 | cbaddr |= (temp << shift); | |
639 | if (shift > 0) | |
640 | shift -= 8; | |
641 | } | |
642 | *cbaddrp = cbaddr; | |
643 | ||
644 | /* port */ | |
645 | shift = 8; | |
646 | for(i = 2; i > 0 ; i--) { | |
647 | if ((temp = parse_octet(&addrlen, &addr)) < 0) { | |
648 | return 0; | |
649 | } | |
650 | cbport |= (temp << shift); | |
651 | if (shift > 0) | |
652 | shift -= 8; | |
653 | } | |
654 | *cbportp = cbport; | |
655 | return 1; | |
656 | } | |
657 | ||
fd39ca9a | 658 | static void |
1da177e4 LT |
659 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se) |
660 | { | |
661 | struct nfs4_callback *cb = &clp->cl_callback; | |
662 | ||
663 | /* Currently, we only support tcp for the callback channel */ | |
664 | if ((se->se_callback_netid_len != 3) || memcmp((char *)se->se_callback_netid_val, "tcp", 3)) | |
665 | goto out_err; | |
666 | ||
667 | if ( !(parse_ipv4(se->se_callback_addr_len, se->se_callback_addr_val, | |
668 | &cb->cb_addr, &cb->cb_port))) | |
669 | goto out_err; | |
670 | cb->cb_prog = se->se_callback_prog; | |
671 | cb->cb_ident = se->se_callback_ident; | |
1da177e4 LT |
672 | return; |
673 | out_err: | |
849823c5 | 674 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
675 | "will not receive delegations\n", |
676 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
677 | ||
1da177e4 LT |
678 | return; |
679 | } | |
680 | ||
681 | /* | |
682 | * RFC 3010 has a complex implmentation description of processing a | |
683 | * SETCLIENTID request consisting of 5 bullets, labeled as | |
684 | * CASE0 - CASE4 below. | |
685 | * | |
686 | * NOTES: | |
687 | * callback information will be processed in a future patch | |
688 | * | |
689 | * an unconfirmed record is added when: | |
690 | * NORMAL (part of CASE 4): there is no confirmed nor unconfirmed record. | |
691 | * CASE 1: confirmed record found with matching name, principal, | |
692 | * verifier, and clientid. | |
693 | * CASE 2: confirmed record found with matching name, principal, | |
694 | * and there is no unconfirmed record with matching | |
695 | * name and principal | |
696 | * | |
697 | * an unconfirmed record is replaced when: | |
698 | * CASE 3: confirmed record found with matching name, principal, | |
699 | * and an unconfirmed record is found with matching | |
700 | * name, principal, and with clientid and | |
701 | * confirm that does not match the confirmed record. | |
702 | * CASE 4: there is no confirmed record with matching name and | |
703 | * principal. there is an unconfirmed record with | |
704 | * matching name, principal. | |
705 | * | |
706 | * an unconfirmed record is deleted when: | |
707 | * CASE 1: an unconfirmed record that matches input name, verifier, | |
708 | * and confirmed clientid. | |
709 | * CASE 4: any unconfirmed records with matching name and principal | |
710 | * that exist after an unconfirmed record has been replaced | |
711 | * as described above. | |
712 | * | |
713 | */ | |
714 | int | |
715 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_setclientid *setclid) | |
716 | { | |
717 | u32 ip_addr = rqstp->rq_addr.sin_addr.s_addr; | |
718 | struct xdr_netobj clname = { | |
719 | .len = setclid->se_namelen, | |
720 | .data = setclid->se_name, | |
721 | }; | |
722 | nfs4_verifier clverifier = setclid->se_verf; | |
723 | unsigned int strhashval; | |
28ce6054 | 724 | struct nfs4_client *conf, *unconf, *new; |
1da177e4 | 725 | int status; |
a55370a3 | 726 | char dname[HEXDIR_LEN]; |
1da177e4 | 727 | |
1da177e4 | 728 | if (!check_name(clname)) |
73aea4ec | 729 | return nfserr_inval; |
1da177e4 | 730 | |
a55370a3 N |
731 | status = nfs4_make_rec_clidname(dname, &clname); |
732 | if (status) | |
73aea4ec | 733 | return status; |
a55370a3 | 734 | |
1da177e4 LT |
735 | /* |
736 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
737 | * We get here on a DRC miss. | |
738 | */ | |
739 | ||
a55370a3 | 740 | strhashval = clientstr_hashval(dname); |
1da177e4 | 741 | |
1da177e4 | 742 | nfs4_lock_state(); |
28ce6054 N |
743 | conf = find_confirmed_client_by_str(dname, strhashval); |
744 | if (conf) { | |
1da177e4 LT |
745 | /* |
746 | * CASE 0: | |
747 | * clname match, confirmed, different principal | |
748 | * or different ip_address | |
749 | */ | |
750 | status = nfserr_clid_inuse; | |
28ce6054 N |
751 | if (!cmp_creds(&conf->cl_cred, &rqstp->rq_cred) |
752 | || conf->cl_addr != ip_addr) { | |
1da177e4 LT |
753 | printk("NFSD: setclientid: string in use by client" |
754 | "(clientid %08x/%08x)\n", | |
28ce6054 | 755 | conf->cl_clientid.cl_boot, conf->cl_clientid.cl_id); |
1da177e4 LT |
756 | goto out; |
757 | } | |
1da177e4 | 758 | } |
28ce6054 | 759 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
1da177e4 LT |
760 | status = nfserr_resource; |
761 | if (!conf) { | |
762 | /* | |
763 | * CASE 4: | |
764 | * placed first, because it is the normal case. | |
765 | */ | |
766 | if (unconf) | |
767 | expire_client(unconf); | |
a55370a3 N |
768 | new = create_client(clname, dname); |
769 | if (new == NULL) | |
1da177e4 LT |
770 | goto out; |
771 | copy_verf(new, &clverifier); | |
772 | new->cl_addr = ip_addr; | |
773 | copy_cred(&new->cl_cred,&rqstp->rq_cred); | |
774 | gen_clid(new); | |
775 | gen_confirm(new); | |
776 | gen_callback(new, setclid); | |
777 | add_to_unconfirmed(new, strhashval); | |
778 | } else if (cmp_verf(&conf->cl_verifier, &clverifier)) { | |
779 | /* | |
780 | * CASE 1: | |
781 | * cl_name match, confirmed, principal match | |
782 | * verifier match: probable callback update | |
783 | * | |
784 | * remove any unconfirmed nfs4_client with | |
785 | * matching cl_name, cl_verifier, and cl_clientid | |
786 | * | |
787 | * create and insert an unconfirmed nfs4_client with same | |
788 | * cl_name, cl_verifier, and cl_clientid as existing | |
789 | * nfs4_client, but with the new callback info and a | |
790 | * new cl_confirm | |
791 | */ | |
31f4a6c1 N |
792 | if (unconf) { |
793 | /* Note this is removing unconfirmed {*x***}, | |
794 | * which is stronger than RFC recommended {vxc**}. | |
795 | * This has the advantage that there is at most | |
796 | * one {*x***} in either list at any time. | |
797 | */ | |
798 | expire_client(unconf); | |
1da177e4 | 799 | } |
a55370a3 N |
800 | new = create_client(clname, dname); |
801 | if (new == NULL) | |
1da177e4 LT |
802 | goto out; |
803 | copy_verf(new,&conf->cl_verifier); | |
804 | new->cl_addr = ip_addr; | |
805 | copy_cred(&new->cl_cred,&rqstp->rq_cred); | |
806 | copy_clid(new, conf); | |
807 | gen_confirm(new); | |
808 | gen_callback(new, setclid); | |
809 | add_to_unconfirmed(new,strhashval); | |
810 | } else if (!unconf) { | |
811 | /* | |
812 | * CASE 2: | |
813 | * clname match, confirmed, principal match | |
814 | * verfier does not match | |
815 | * no unconfirmed. create a new unconfirmed nfs4_client | |
816 | * using input clverifier, clname, and callback info | |
817 | * and generate a new cl_clientid and cl_confirm. | |
818 | */ | |
a55370a3 N |
819 | new = create_client(clname, dname); |
820 | if (new == NULL) | |
1da177e4 LT |
821 | goto out; |
822 | copy_verf(new,&clverifier); | |
823 | new->cl_addr = ip_addr; | |
824 | copy_cred(&new->cl_cred,&rqstp->rq_cred); | |
825 | gen_clid(new); | |
826 | gen_confirm(new); | |
827 | gen_callback(new, setclid); | |
828 | add_to_unconfirmed(new, strhashval); | |
829 | } else if (!cmp_verf(&conf->cl_confirm, &unconf->cl_confirm)) { | |
830 | /* | |
831 | * CASE3: | |
832 | * confirmed found (name, principal match) | |
833 | * confirmed verifier does not match input clverifier | |
834 | * | |
835 | * unconfirmed found (name match) | |
836 | * confirmed->cl_confirm != unconfirmed->cl_confirm | |
837 | * | |
838 | * remove unconfirmed. | |
839 | * | |
840 | * create an unconfirmed nfs4_client | |
841 | * with same cl_name as existing confirmed nfs4_client, | |
842 | * but with new callback info, new cl_clientid, | |
843 | * new cl_verifier and a new cl_confirm | |
844 | */ | |
845 | expire_client(unconf); | |
a55370a3 N |
846 | new = create_client(clname, dname); |
847 | if (new == NULL) | |
1da177e4 LT |
848 | goto out; |
849 | copy_verf(new,&clverifier); | |
850 | new->cl_addr = ip_addr; | |
851 | copy_cred(&new->cl_cred,&rqstp->rq_cred); | |
852 | gen_clid(new); | |
853 | gen_confirm(new); | |
854 | gen_callback(new, setclid); | |
855 | add_to_unconfirmed(new, strhashval); | |
856 | } else { | |
857 | /* No cases hit !!! */ | |
858 | status = nfserr_inval; | |
859 | goto out; | |
860 | ||
861 | } | |
862 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; | |
863 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
864 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
865 | status = nfs_ok; | |
866 | out: | |
867 | nfs4_unlock_state(); | |
868 | return status; | |
869 | } | |
870 | ||
871 | ||
872 | /* | |
873 | * RFC 3010 has a complex implmentation description of processing a | |
874 | * SETCLIENTID_CONFIRM request consisting of 4 bullets describing | |
875 | * processing on a DRC miss, labeled as CASE1 - CASE4 below. | |
876 | * | |
877 | * NOTE: callback information will be processed here in a future patch | |
878 | */ | |
879 | int | |
880 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, struct nfsd4_setclientid_confirm *setclientid_confirm) | |
881 | { | |
882 | u32 ip_addr = rqstp->rq_addr.sin_addr.s_addr; | |
21ab45a4 | 883 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
884 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
885 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
886 | int status; | |
887 | ||
888 | if (STALE_CLIENTID(clid)) | |
889 | return nfserr_stale_clientid; | |
890 | /* | |
891 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
892 | * We get here on a DRC miss. | |
893 | */ | |
894 | ||
895 | nfs4_lock_state(); | |
21ab45a4 N |
896 | |
897 | conf = find_confirmed_client(clid); | |
898 | unconf = find_unconfirmed_client(clid); | |
899 | ||
900 | status = nfserr_clid_inuse; | |
901 | if (conf && conf->cl_addr != ip_addr) | |
902 | goto out; | |
903 | if (unconf && unconf->cl_addr != ip_addr) | |
904 | goto out; | |
905 | ||
1da177e4 LT |
906 | if ((conf && unconf) && |
907 | (cmp_verf(&unconf->cl_confirm, &confirm)) && | |
908 | (cmp_verf(&conf->cl_verifier, &unconf->cl_verifier)) && | |
a55370a3 | 909 | (same_name(conf->cl_recdir,unconf->cl_recdir)) && |
1da177e4 | 910 | (!cmp_verf(&conf->cl_confirm, &unconf->cl_confirm))) { |
7c79f737 N |
911 | /* CASE 1: |
912 | * unconf record that matches input clientid and input confirm. | |
913 | * conf record that matches input clientid. | |
914 | * conf and unconf records match names, verifiers | |
915 | */ | |
1da177e4 LT |
916 | if (!cmp_creds(&conf->cl_cred, &unconf->cl_cred)) |
917 | status = nfserr_clid_inuse; | |
918 | else { | |
1a69c179 N |
919 | /* XXX: We just turn off callbacks until we can handle |
920 | * change request correctly. */ | |
cb36d634 | 921 | atomic_set(&conf->cl_callback.cb_set, 0); |
21ab45a4 | 922 | gen_confirm(conf); |
46309029 | 923 | nfsd4_remove_clid_dir(unconf); |
1a69c179 | 924 | expire_client(unconf); |
1da177e4 | 925 | status = nfs_ok; |
1a69c179 | 926 | |
1da177e4 | 927 | } |
7c79f737 | 928 | } else if ((conf && !unconf) || |
1da177e4 LT |
929 | ((conf && unconf) && |
930 | (!cmp_verf(&conf->cl_verifier, &unconf->cl_verifier) || | |
a55370a3 | 931 | !same_name(conf->cl_recdir, unconf->cl_recdir)))) { |
7c79f737 N |
932 | /* CASE 2: |
933 | * conf record that matches input clientid. | |
934 | * if unconf record matches input clientid, then | |
935 | * unconf->cl_name or unconf->cl_verifier don't match the | |
936 | * conf record. | |
937 | */ | |
21ab45a4 | 938 | if (!cmp_creds(&conf->cl_cred,&rqstp->rq_cred)) |
1da177e4 | 939 | status = nfserr_clid_inuse; |
21ab45a4 | 940 | else |
1da177e4 | 941 | status = nfs_ok; |
7c79f737 N |
942 | } else if (!conf && unconf |
943 | && cmp_verf(&unconf->cl_confirm, &confirm)) { | |
944 | /* CASE 3: | |
945 | * conf record not found. | |
946 | * unconf record found. | |
947 | * unconf->cl_confirm matches input confirm | |
948 | */ | |
1da177e4 LT |
949 | if (!cmp_creds(&unconf->cl_cred, &rqstp->rq_cred)) { |
950 | status = nfserr_clid_inuse; | |
951 | } else { | |
1a69c179 N |
952 | unsigned int hash = |
953 | clientstr_hashval(unconf->cl_recdir); | |
954 | conf = find_confirmed_client_by_str(unconf->cl_recdir, | |
955 | hash); | |
956 | if (conf) { | |
c7b9a459 | 957 | nfsd4_remove_clid_dir(conf); |
1a69c179 N |
958 | expire_client(conf); |
959 | } | |
1da177e4 | 960 | move_to_confirmed(unconf); |
21ab45a4 | 961 | conf = unconf; |
1a69c179 | 962 | status = nfs_ok; |
1da177e4 | 963 | } |
7c79f737 N |
964 | } else if ((!conf || (conf && !cmp_verf(&conf->cl_confirm, &confirm))) |
965 | && (!unconf || (unconf && !cmp_verf(&unconf->cl_confirm, | |
966 | &confirm)))) { | |
967 | /* CASE 4: | |
968 | * conf record not found, or if conf, conf->cl_confirm does not | |
969 | * match input confirm. | |
970 | * unconf record not found, or if unconf, unconf->cl_confirm | |
971 | * does not match input confirm. | |
972 | */ | |
1da177e4 | 973 | status = nfserr_stale_clientid; |
7c79f737 | 974 | } else { |
08e8987c N |
975 | /* check that we have hit one of the cases...*/ |
976 | status = nfserr_clid_inuse; | |
977 | } | |
1da177e4 LT |
978 | out: |
979 | if (!status) | |
21ab45a4 | 980 | nfsd4_probe_callback(conf); |
1da177e4 LT |
981 | nfs4_unlock_state(); |
982 | return status; | |
983 | } | |
984 | ||
1da177e4 LT |
985 | /* OPEN Share state helper functions */ |
986 | static inline struct nfs4_file * | |
987 | alloc_init_file(struct inode *ino) | |
988 | { | |
989 | struct nfs4_file *fp; | |
990 | unsigned int hashval = file_hashval(ino); | |
991 | ||
e60d4398 N |
992 | fp = kmem_cache_alloc(file_slab, GFP_KERNEL); |
993 | if (fp) { | |
13cd2184 | 994 | kref_init(&fp->fi_ref); |
1da177e4 | 995 | INIT_LIST_HEAD(&fp->fi_hash); |
8beefa24 N |
996 | INIT_LIST_HEAD(&fp->fi_stateids); |
997 | INIT_LIST_HEAD(&fp->fi_delegations); | |
1da177e4 LT |
998 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); |
999 | fp->fi_inode = igrab(ino); | |
1000 | fp->fi_id = current_fileid++; | |
1da177e4 LT |
1001 | return fp; |
1002 | } | |
1003 | return NULL; | |
1004 | } | |
1005 | ||
e60d4398 N |
1006 | static void |
1007 | nfsd4_free_slab(kmem_cache_t **slab) | |
1da177e4 | 1008 | { |
e60d4398 N |
1009 | int status; |
1010 | ||
1011 | if (*slab == NULL) | |
1012 | return; | |
1013 | status = kmem_cache_destroy(*slab); | |
1014 | *slab = NULL; | |
1015 | WARN_ON(status); | |
1da177e4 LT |
1016 | } |
1017 | ||
1018 | static void | |
1019 | nfsd4_free_slabs(void) | |
1020 | { | |
e60d4398 N |
1021 | nfsd4_free_slab(&stateowner_slab); |
1022 | nfsd4_free_slab(&file_slab); | |
5ac049ac | 1023 | nfsd4_free_slab(&stateid_slab); |
5b2d21c1 | 1024 | nfsd4_free_slab(&deleg_slab); |
e60d4398 | 1025 | } |
1da177e4 | 1026 | |
e60d4398 N |
1027 | static int |
1028 | nfsd4_init_slabs(void) | |
1029 | { | |
1030 | stateowner_slab = kmem_cache_create("nfsd4_stateowners", | |
1031 | sizeof(struct nfs4_stateowner), 0, 0, NULL, NULL); | |
1032 | if (stateowner_slab == NULL) | |
1033 | goto out_nomem; | |
1034 | file_slab = kmem_cache_create("nfsd4_files", | |
1035 | sizeof(struct nfs4_file), 0, 0, NULL, NULL); | |
1036 | if (file_slab == NULL) | |
1037 | goto out_nomem; | |
5ac049ac N |
1038 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
1039 | sizeof(struct nfs4_stateid), 0, 0, NULL, NULL); | |
1040 | if (stateid_slab == NULL) | |
1041 | goto out_nomem; | |
5b2d21c1 N |
1042 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
1043 | sizeof(struct nfs4_delegation), 0, 0, NULL, NULL); | |
1044 | if (deleg_slab == NULL) | |
1045 | goto out_nomem; | |
e60d4398 N |
1046 | return 0; |
1047 | out_nomem: | |
1048 | nfsd4_free_slabs(); | |
1049 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | |
1050 | return -ENOMEM; | |
1da177e4 LT |
1051 | } |
1052 | ||
1053 | void | |
1054 | nfs4_free_stateowner(struct kref *kref) | |
1055 | { | |
1056 | struct nfs4_stateowner *sop = | |
1057 | container_of(kref, struct nfs4_stateowner, so_ref); | |
1058 | kfree(sop->so_owner.data); | |
1059 | kmem_cache_free(stateowner_slab, sop); | |
1060 | } | |
1061 | ||
1062 | static inline struct nfs4_stateowner * | |
1063 | alloc_stateowner(struct xdr_netobj *owner) | |
1064 | { | |
1065 | struct nfs4_stateowner *sop; | |
1066 | ||
1067 | if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) { | |
1068 | if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) { | |
1069 | memcpy(sop->so_owner.data, owner->data, owner->len); | |
1070 | sop->so_owner.len = owner->len; | |
1071 | kref_init(&sop->so_ref); | |
1072 | return sop; | |
1073 | } | |
1074 | kmem_cache_free(stateowner_slab, sop); | |
1075 | } | |
1076 | return NULL; | |
1077 | } | |
1078 | ||
1079 | static struct nfs4_stateowner * | |
1080 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { | |
1081 | struct nfs4_stateowner *sop; | |
1082 | struct nfs4_replay *rp; | |
1083 | unsigned int idhashval; | |
1084 | ||
1085 | if (!(sop = alloc_stateowner(&open->op_owner))) | |
1086 | return NULL; | |
1087 | idhashval = ownerid_hashval(current_ownerid); | |
1088 | INIT_LIST_HEAD(&sop->so_idhash); | |
1089 | INIT_LIST_HEAD(&sop->so_strhash); | |
1090 | INIT_LIST_HEAD(&sop->so_perclient); | |
ea1da636 N |
1091 | INIT_LIST_HEAD(&sop->so_stateids); |
1092 | INIT_LIST_HEAD(&sop->so_perstateid); /* not used */ | |
1da177e4 LT |
1093 | INIT_LIST_HEAD(&sop->so_close_lru); |
1094 | sop->so_time = 0; | |
1095 | list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]); | |
1096 | list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]); | |
ea1da636 | 1097 | list_add(&sop->so_perclient, &clp->cl_openowners); |
1da177e4 LT |
1098 | sop->so_is_open_owner = 1; |
1099 | sop->so_id = current_ownerid++; | |
1100 | sop->so_client = clp; | |
1101 | sop->so_seqid = open->op_seqid; | |
1102 | sop->so_confirmed = 0; | |
1103 | rp = &sop->so_replay; | |
de1ae286 | 1104 | rp->rp_status = nfserr_serverfault; |
1da177e4 LT |
1105 | rp->rp_buflen = 0; |
1106 | rp->rp_buf = rp->rp_ibuf; | |
1107 | return sop; | |
1108 | } | |
1109 | ||
1110 | static void | |
1111 | release_stateid_lockowners(struct nfs4_stateid *open_stp) | |
1112 | { | |
1113 | struct nfs4_stateowner *lock_sop; | |
1114 | ||
ea1da636 N |
1115 | while (!list_empty(&open_stp->st_lockowners)) { |
1116 | lock_sop = list_entry(open_stp->st_lockowners.next, | |
1117 | struct nfs4_stateowner, so_perstateid); | |
1118 | /* list_del(&open_stp->st_lockowners); */ | |
1da177e4 LT |
1119 | BUG_ON(lock_sop->so_is_open_owner); |
1120 | release_stateowner(lock_sop); | |
1121 | } | |
1122 | } | |
1123 | ||
1124 | static void | |
1125 | unhash_stateowner(struct nfs4_stateowner *sop) | |
1126 | { | |
1127 | struct nfs4_stateid *stp; | |
1128 | ||
1129 | list_del(&sop->so_idhash); | |
1130 | list_del(&sop->so_strhash); | |
6fa305de | 1131 | if (sop->so_is_open_owner) |
1da177e4 | 1132 | list_del(&sop->so_perclient); |
ea1da636 N |
1133 | list_del(&sop->so_perstateid); |
1134 | while (!list_empty(&sop->so_stateids)) { | |
1135 | stp = list_entry(sop->so_stateids.next, | |
1136 | struct nfs4_stateid, st_perstateowner); | |
1da177e4 LT |
1137 | if (sop->so_is_open_owner) |
1138 | release_stateid(stp, OPEN_STATE); | |
1139 | else | |
1140 | release_stateid(stp, LOCK_STATE); | |
1141 | } | |
1142 | } | |
1143 | ||
1144 | static void | |
1145 | release_stateowner(struct nfs4_stateowner *sop) | |
1146 | { | |
1147 | unhash_stateowner(sop); | |
1148 | list_del(&sop->so_close_lru); | |
1149 | nfs4_put_stateowner(sop); | |
1150 | } | |
1151 | ||
1152 | static inline void | |
1153 | init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { | |
1154 | struct nfs4_stateowner *sop = open->op_stateowner; | |
1155 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); | |
1156 | ||
1157 | INIT_LIST_HEAD(&stp->st_hash); | |
ea1da636 N |
1158 | INIT_LIST_HEAD(&stp->st_perstateowner); |
1159 | INIT_LIST_HEAD(&stp->st_lockowners); | |
1da177e4 LT |
1160 | INIT_LIST_HEAD(&stp->st_perfile); |
1161 | list_add(&stp->st_hash, &stateid_hashtbl[hashval]); | |
ea1da636 | 1162 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
8beefa24 | 1163 | list_add(&stp->st_perfile, &fp->fi_stateids); |
1da177e4 | 1164 | stp->st_stateowner = sop; |
13cd2184 | 1165 | get_nfs4_file(fp); |
1da177e4 LT |
1166 | stp->st_file = fp; |
1167 | stp->st_stateid.si_boot = boot_time; | |
1168 | stp->st_stateid.si_stateownerid = sop->so_id; | |
1169 | stp->st_stateid.si_fileid = fp->fi_id; | |
1170 | stp->st_stateid.si_generation = 0; | |
1171 | stp->st_access_bmap = 0; | |
1172 | stp->st_deny_bmap = 0; | |
1173 | __set_bit(open->op_share_access, &stp->st_access_bmap); | |
1174 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); | |
4c4cd222 | 1175 | stp->st_openstp = NULL; |
1da177e4 LT |
1176 | } |
1177 | ||
1178 | static void | |
1179 | release_stateid(struct nfs4_stateid *stp, int flags) | |
1180 | { | |
1181 | struct file *filp = stp->st_vfs_file; | |
1182 | ||
1183 | list_del(&stp->st_hash); | |
1da177e4 | 1184 | list_del(&stp->st_perfile); |
ea1da636 | 1185 | list_del(&stp->st_perstateowner); |
1da177e4 LT |
1186 | if (flags & OPEN_STATE) { |
1187 | release_stateid_lockowners(stp); | |
1188 | stp->st_vfs_file = NULL; | |
1189 | nfsd_close(filp); | |
1da177e4 LT |
1190 | } else if (flags & LOCK_STATE) |
1191 | locks_remove_posix(filp, (fl_owner_t) stp->st_stateowner); | |
13cd2184 | 1192 | put_nfs4_file(stp->st_file); |
5ac049ac | 1193 | kmem_cache_free(stateid_slab, stp); |
1da177e4 LT |
1194 | } |
1195 | ||
fd39ca9a | 1196 | static void |
1da177e4 LT |
1197 | move_to_close_lru(struct nfs4_stateowner *sop) |
1198 | { | |
1199 | dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); | |
1200 | ||
358dd55a | 1201 | list_move_tail(&sop->so_close_lru, &close_lru); |
1da177e4 LT |
1202 | sop->so_time = get_seconds(); |
1203 | } | |
1204 | ||
1da177e4 LT |
1205 | static int |
1206 | cmp_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, clientid_t *clid) { | |
1207 | return ((sop->so_owner.len == owner->len) && | |
1208 | !memcmp(sop->so_owner.data, owner->data, owner->len) && | |
1209 | (sop->so_client->cl_clientid.cl_id == clid->cl_id)); | |
1210 | } | |
1211 | ||
1212 | static struct nfs4_stateowner * | |
1213 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) | |
1214 | { | |
1215 | struct nfs4_stateowner *so = NULL; | |
1216 | ||
1217 | list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { | |
1218 | if (cmp_owner_str(so, &open->op_owner, &open->op_clientid)) | |
1219 | return so; | |
1220 | } | |
1221 | return NULL; | |
1222 | } | |
1223 | ||
1224 | /* search file_hashtbl[] for file */ | |
1225 | static struct nfs4_file * | |
1226 | find_file(struct inode *ino) | |
1227 | { | |
1228 | unsigned int hashval = file_hashval(ino); | |
1229 | struct nfs4_file *fp; | |
1230 | ||
1231 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { | |
13cd2184 N |
1232 | if (fp->fi_inode == ino) { |
1233 | get_nfs4_file(fp); | |
1da177e4 | 1234 | return fp; |
13cd2184 | 1235 | } |
1da177e4 LT |
1236 | } |
1237 | return NULL; | |
1238 | } | |
1239 | ||
ba5a6a19 BF |
1240 | static int access_valid(u32 x) |
1241 | { | |
1242 | return (x > 0 && x < 4); | |
1243 | } | |
1244 | ||
1245 | static int deny_valid(u32 x) | |
1246 | { | |
1247 | return (x >= 0 && x < 5); | |
1248 | } | |
1da177e4 | 1249 | |
fd39ca9a | 1250 | static void |
1da177e4 LT |
1251 | set_access(unsigned int *access, unsigned long bmap) { |
1252 | int i; | |
1253 | ||
1254 | *access = 0; | |
1255 | for (i = 1; i < 4; i++) { | |
1256 | if (test_bit(i, &bmap)) | |
1257 | *access |= i; | |
1258 | } | |
1259 | } | |
1260 | ||
fd39ca9a | 1261 | static void |
1da177e4 LT |
1262 | set_deny(unsigned int *deny, unsigned long bmap) { |
1263 | int i; | |
1264 | ||
1265 | *deny = 0; | |
1266 | for (i = 0; i < 4; i++) { | |
1267 | if (test_bit(i, &bmap)) | |
1268 | *deny |= i ; | |
1269 | } | |
1270 | } | |
1271 | ||
1272 | static int | |
1273 | test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { | |
1274 | unsigned int access, deny; | |
1275 | ||
1276 | set_access(&access, stp->st_access_bmap); | |
1277 | set_deny(&deny, stp->st_deny_bmap); | |
1278 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) | |
1279 | return 0; | |
1280 | return 1; | |
1281 | } | |
1282 | ||
1283 | /* | |
1284 | * Called to check deny when READ with all zero stateid or | |
1285 | * WRITE with all zero or all one stateid | |
1286 | */ | |
fd39ca9a | 1287 | static int |
1da177e4 LT |
1288 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
1289 | { | |
1290 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
1291 | struct nfs4_file *fp; | |
1292 | struct nfs4_stateid *stp; | |
13cd2184 | 1293 | int ret; |
1da177e4 LT |
1294 | |
1295 | dprintk("NFSD: nfs4_share_conflict\n"); | |
1296 | ||
1297 | fp = find_file(ino); | |
13cd2184 N |
1298 | if (!fp) |
1299 | return nfs_ok; | |
b700949b | 1300 | ret = nfserr_locked; |
1da177e4 | 1301 | /* Search for conflicting share reservations */ |
13cd2184 N |
1302 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
1303 | if (test_bit(deny_type, &stp->st_deny_bmap) || | |
1304 | test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) | |
1305 | goto out; | |
1da177e4 | 1306 | } |
13cd2184 N |
1307 | ret = nfs_ok; |
1308 | out: | |
1309 | put_nfs4_file(fp); | |
1310 | return ret; | |
1da177e4 LT |
1311 | } |
1312 | ||
1313 | static inline void | |
1314 | nfs4_file_downgrade(struct file *filp, unsigned int share_access) | |
1315 | { | |
1316 | if (share_access & NFS4_SHARE_ACCESS_WRITE) { | |
1317 | put_write_access(filp->f_dentry->d_inode); | |
1318 | filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE; | |
1319 | } | |
1320 | } | |
1321 | ||
1322 | /* | |
1323 | * Recall a delegation | |
1324 | */ | |
1325 | static int | |
1326 | do_recall(void *__dp) | |
1327 | { | |
1328 | struct nfs4_delegation *dp = __dp; | |
1329 | ||
1330 | daemonize("nfsv4-recall"); | |
1331 | ||
1332 | nfsd4_cb_recall(dp); | |
1333 | return 0; | |
1334 | } | |
1335 | ||
1336 | /* | |
1337 | * Spawn a thread to perform a recall on the delegation represented | |
1338 | * by the lease (file_lock) | |
1339 | * | |
1340 | * Called from break_lease() with lock_kernel() held. | |
1341 | * Note: we assume break_lease will only call this *once* for any given | |
1342 | * lease. | |
1343 | */ | |
1344 | static | |
1345 | void nfsd_break_deleg_cb(struct file_lock *fl) | |
1346 | { | |
1347 | struct nfs4_delegation *dp= (struct nfs4_delegation *)fl->fl_owner; | |
1348 | struct task_struct *t; | |
1349 | ||
1350 | dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl); | |
1351 | if (!dp) | |
1352 | return; | |
1353 | ||
1354 | /* We're assuming the state code never drops its reference | |
1355 | * without first removing the lease. Since we're in this lease | |
1356 | * callback (and since the lease code is serialized by the kernel | |
1357 | * lock) we know the server hasn't removed the lease yet, we know | |
1358 | * it's safe to take a reference: */ | |
1359 | atomic_inc(&dp->dl_count); | |
1360 | ||
1361 | spin_lock(&recall_lock); | |
1362 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); | |
1363 | spin_unlock(&recall_lock); | |
1364 | ||
1365 | /* only place dl_time is set. protected by lock_kernel*/ | |
1366 | dp->dl_time = get_seconds(); | |
1367 | ||
1368 | /* XXX need to merge NFSD_LEASE_TIME with fs/locks.c:lease_break_time */ | |
1369 | fl->fl_break_time = jiffies + NFSD_LEASE_TIME * HZ; | |
1370 | ||
1371 | t = kthread_run(do_recall, dp, "%s", "nfs4_cb_recall"); | |
1372 | if (IS_ERR(t)) { | |
1373 | struct nfs4_client *clp = dp->dl_client; | |
1374 | ||
1375 | printk(KERN_INFO "NFSD: Callback thread failed for " | |
1376 | "for client (clientid %08x/%08x)\n", | |
1377 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
1378 | nfs4_put_delegation(dp); | |
1379 | } | |
1380 | } | |
1381 | ||
1382 | /* | |
1383 | * The file_lock is being reapd. | |
1384 | * | |
1385 | * Called by locks_free_lock() with lock_kernel() held. | |
1386 | */ | |
1387 | static | |
1388 | void nfsd_release_deleg_cb(struct file_lock *fl) | |
1389 | { | |
1390 | struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; | |
1391 | ||
1392 | dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count)); | |
1393 | ||
1394 | if (!(fl->fl_flags & FL_LEASE) || !dp) | |
1395 | return; | |
1396 | dp->dl_flock = NULL; | |
1397 | } | |
1398 | ||
1399 | /* | |
1400 | * Set the delegation file_lock back pointer. | |
1401 | * | |
1402 | * Called from __setlease() with lock_kernel() held. | |
1403 | */ | |
1404 | static | |
1405 | void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl) | |
1406 | { | |
1407 | struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner; | |
1408 | ||
1409 | dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp); | |
1410 | if (!dp) | |
1411 | return; | |
1412 | dp->dl_flock = new; | |
1413 | } | |
1414 | ||
1415 | /* | |
1416 | * Called from __setlease() with lock_kernel() held | |
1417 | */ | |
1418 | static | |
1419 | int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try) | |
1420 | { | |
1421 | struct nfs4_delegation *onlistd = | |
1422 | (struct nfs4_delegation *)onlist->fl_owner; | |
1423 | struct nfs4_delegation *tryd = | |
1424 | (struct nfs4_delegation *)try->fl_owner; | |
1425 | ||
1426 | if (onlist->fl_lmops != try->fl_lmops) | |
1427 | return 0; | |
1428 | ||
1429 | return onlistd->dl_client == tryd->dl_client; | |
1430 | } | |
1431 | ||
1432 | ||
1433 | static | |
1434 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
1435 | { | |
1436 | if (arg & F_UNLCK) | |
1437 | return lease_modify(onlist, arg); | |
1438 | else | |
1439 | return -EAGAIN; | |
1440 | } | |
1441 | ||
fd39ca9a | 1442 | static struct lock_manager_operations nfsd_lease_mng_ops = { |
1da177e4 LT |
1443 | .fl_break = nfsd_break_deleg_cb, |
1444 | .fl_release_private = nfsd_release_deleg_cb, | |
1445 | .fl_copy_lock = nfsd_copy_lock_deleg_cb, | |
1446 | .fl_mylease = nfsd_same_client_deleg_cb, | |
1447 | .fl_change = nfsd_change_deleg_cb, | |
1448 | }; | |
1449 | ||
1450 | ||
1da177e4 LT |
1451 | int |
1452 | nfsd4_process_open1(struct nfsd4_open *open) | |
1453 | { | |
1da177e4 LT |
1454 | clientid_t *clientid = &open->op_clientid; |
1455 | struct nfs4_client *clp = NULL; | |
1456 | unsigned int strhashval; | |
1457 | struct nfs4_stateowner *sop = NULL; | |
1458 | ||
1da177e4 | 1459 | if (!check_name(open->op_owner)) |
0f442aa2 | 1460 | return nfserr_inval; |
1da177e4 LT |
1461 | |
1462 | if (STALE_CLIENTID(&open->op_clientid)) | |
1463 | return nfserr_stale_clientid; | |
1464 | ||
1465 | strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner); | |
1466 | sop = find_openstateowner_str(strhashval, open); | |
0f442aa2 BF |
1467 | open->op_stateowner = sop; |
1468 | if (!sop) { | |
1469 | /* Make sure the client's lease hasn't expired. */ | |
1da177e4 LT |
1470 | clp = find_confirmed_client(clientid); |
1471 | if (clp == NULL) | |
0f442aa2 BF |
1472 | return nfserr_expired; |
1473 | goto renew; | |
1da177e4 | 1474 | } |
0f442aa2 BF |
1475 | if (!sop->so_confirmed) { |
1476 | /* Replace unconfirmed owners without checking for replay. */ | |
1477 | clp = sop->so_client; | |
1478 | release_stateowner(sop); | |
1479 | open->op_stateowner = NULL; | |
1480 | goto renew; | |
1481 | } | |
1482 | if (open->op_seqid == sop->so_seqid - 1) { | |
1483 | if (sop->so_replay.rp_buflen) | |
1484 | return NFSERR_REPLAY_ME; | |
1485 | /* The original OPEN failed so spectacularly | |
1486 | * that we don't even have replay data saved! | |
1487 | * Therefore, we have no choice but to continue | |
1488 | * processing this OPEN; presumably, we'll | |
1489 | * fail again for the same reason. | |
1490 | */ | |
1491 | dprintk("nfsd4_process_open1: replay with no replay cache\n"); | |
1492 | goto renew; | |
1493 | } | |
1494 | if (open->op_seqid != sop->so_seqid) | |
1495 | return nfserr_bad_seqid; | |
1da177e4 | 1496 | renew: |
0f442aa2 BF |
1497 | if (open->op_stateowner == NULL) { |
1498 | sop = alloc_init_open_stateowner(strhashval, clp, open); | |
1499 | if (sop == NULL) | |
1500 | return nfserr_resource; | |
1501 | open->op_stateowner = sop; | |
1502 | } | |
1503 | list_del_init(&sop->so_close_lru); | |
1da177e4 | 1504 | renew_client(sop->so_client); |
0f442aa2 | 1505 | return nfs_ok; |
1da177e4 LT |
1506 | } |
1507 | ||
4a6e43e6 N |
1508 | static inline int |
1509 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) | |
1510 | { | |
1511 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
1512 | return nfserr_openmode; | |
1513 | else | |
1514 | return nfs_ok; | |
1515 | } | |
1516 | ||
52f4fb43 N |
1517 | static struct nfs4_delegation * |
1518 | find_delegation_file(struct nfs4_file *fp, stateid_t *stid) | |
1519 | { | |
1520 | struct nfs4_delegation *dp; | |
1521 | ||
ea1da636 | 1522 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) { |
52f4fb43 N |
1523 | if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) |
1524 | return dp; | |
1525 | } | |
1526 | return NULL; | |
1527 | } | |
1528 | ||
c44c5eeb | 1529 | static int |
567d9829 N |
1530 | nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, |
1531 | struct nfs4_delegation **dp) | |
1532 | { | |
1533 | int flags; | |
c44c5eeb | 1534 | int status = nfserr_bad_stateid; |
567d9829 N |
1535 | |
1536 | *dp = find_delegation_file(fp, &open->op_delegate_stateid); | |
1537 | if (*dp == NULL) | |
c44c5eeb | 1538 | goto out; |
567d9829 N |
1539 | flags = open->op_share_access == NFS4_SHARE_ACCESS_READ ? |
1540 | RD_STATE : WR_STATE; | |
1541 | status = nfs4_check_delegmode(*dp, flags); | |
1542 | if (status) | |
1543 | *dp = NULL; | |
c44c5eeb N |
1544 | out: |
1545 | if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
1546 | return nfs_ok; | |
1547 | if (status) | |
1548 | return status; | |
1549 | open->op_stateowner->so_confirmed = 1; | |
1550 | return nfs_ok; | |
567d9829 N |
1551 | } |
1552 | ||
1da177e4 LT |
1553 | static int |
1554 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) | |
1555 | { | |
1556 | struct nfs4_stateid *local; | |
1557 | int status = nfserr_share_denied; | |
1558 | struct nfs4_stateowner *sop = open->op_stateowner; | |
1559 | ||
8beefa24 | 1560 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
1561 | /* ignore lock owners */ |
1562 | if (local->st_stateowner->so_is_open_owner == 0) | |
1563 | continue; | |
1564 | /* remember if we have seen this open owner */ | |
1565 | if (local->st_stateowner == sop) | |
1566 | *stpp = local; | |
1567 | /* check for conflicting share reservations */ | |
1568 | if (!test_share(local, open)) | |
1569 | goto out; | |
1570 | } | |
1571 | status = 0; | |
1572 | out: | |
1573 | return status; | |
1574 | } | |
1575 | ||
5ac049ac N |
1576 | static inline struct nfs4_stateid * |
1577 | nfs4_alloc_stateid(void) | |
1578 | { | |
1579 | return kmem_cache_alloc(stateid_slab, GFP_KERNEL); | |
1580 | } | |
1581 | ||
1da177e4 LT |
1582 | static int |
1583 | nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, | |
567d9829 | 1584 | struct nfs4_delegation *dp, |
1da177e4 LT |
1585 | struct svc_fh *cur_fh, int flags) |
1586 | { | |
1587 | struct nfs4_stateid *stp; | |
1da177e4 | 1588 | |
5ac049ac | 1589 | stp = nfs4_alloc_stateid(); |
1da177e4 LT |
1590 | if (stp == NULL) |
1591 | return nfserr_resource; | |
1592 | ||
567d9829 N |
1593 | if (dp) { |
1594 | get_file(dp->dl_vfs_file); | |
1595 | stp->st_vfs_file = dp->dl_vfs_file; | |
1596 | } else { | |
1597 | int status; | |
1598 | status = nfsd_open(rqstp, cur_fh, S_IFREG, flags, | |
1599 | &stp->st_vfs_file); | |
1600 | if (status) { | |
1601 | if (status == nfserr_dropit) | |
1602 | status = nfserr_jukebox; | |
5ac049ac | 1603 | kmem_cache_free(stateid_slab, stp); |
567d9829 N |
1604 | return status; |
1605 | } | |
1da177e4 | 1606 | } |
1da177e4 LT |
1607 | *stpp = stp; |
1608 | return 0; | |
1609 | } | |
1610 | ||
1611 | static inline int | |
1612 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, | |
1613 | struct nfsd4_open *open) | |
1614 | { | |
1615 | struct iattr iattr = { | |
1616 | .ia_valid = ATTR_SIZE, | |
1617 | .ia_size = 0, | |
1618 | }; | |
1619 | if (!open->op_truncate) | |
1620 | return 0; | |
1621 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 1622 | return nfserr_inval; |
1da177e4 LT |
1623 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
1624 | } | |
1625 | ||
1626 | static int | |
1627 | nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open) | |
1628 | { | |
1629 | struct file *filp = stp->st_vfs_file; | |
1630 | struct inode *inode = filp->f_dentry->d_inode; | |
6c26d08f | 1631 | unsigned int share_access, new_writer; |
1da177e4 LT |
1632 | int status; |
1633 | ||
1634 | set_access(&share_access, stp->st_access_bmap); | |
6c26d08f BF |
1635 | new_writer = (~share_access) & open->op_share_access |
1636 | & NFS4_SHARE_ACCESS_WRITE; | |
1da177e4 | 1637 | |
6c26d08f BF |
1638 | if (new_writer) { |
1639 | status = get_write_access(inode); | |
1640 | if (status) | |
1641 | return nfserrno(status); | |
1642 | } | |
1da177e4 LT |
1643 | status = nfsd4_truncate(rqstp, cur_fh, open); |
1644 | if (status) { | |
6c26d08f BF |
1645 | if (new_writer) |
1646 | put_write_access(inode); | |
1da177e4 LT |
1647 | return status; |
1648 | } | |
1649 | /* remember the open */ | |
6c26d08f | 1650 | filp->f_mode |= open->op_share_access; |
1da177e4 LT |
1651 | set_bit(open->op_share_access, &stp->st_access_bmap); |
1652 | set_bit(open->op_share_deny, &stp->st_deny_bmap); | |
1653 | ||
1654 | return nfs_ok; | |
1655 | } | |
1656 | ||
1657 | ||
1da177e4 | 1658 | static void |
37515177 | 1659 | nfs4_set_claim_prev(struct nfsd4_open *open) |
1da177e4 | 1660 | { |
37515177 N |
1661 | open->op_stateowner->so_confirmed = 1; |
1662 | open->op_stateowner->so_client->cl_firststate = 1; | |
1da177e4 LT |
1663 | } |
1664 | ||
1665 | /* | |
1666 | * Attempt to hand out a delegation. | |
1667 | */ | |
1668 | static void | |
1669 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) | |
1670 | { | |
1671 | struct nfs4_delegation *dp; | |
1672 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
1673 | struct nfs4_callback *cb = &sop->so_client->cl_callback; | |
1674 | struct file_lock fl, *flp = &fl; | |
1675 | int status, flag = 0; | |
1676 | ||
1677 | flag = NFS4_OPEN_DELEGATE_NONE; | |
7b190fec N |
1678 | open->op_recall = 0; |
1679 | switch (open->op_claim_type) { | |
1680 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
1681 | if (!atomic_read(&cb->cb_set)) | |
1682 | open->op_recall = 1; | |
1683 | flag = open->op_delegate_type; | |
1684 | if (flag == NFS4_OPEN_DELEGATE_NONE) | |
1685 | goto out; | |
1686 | break; | |
1687 | case NFS4_OPEN_CLAIM_NULL: | |
1688 | /* Let's not give out any delegations till everyone's | |
1689 | * had the chance to reclaim theirs.... */ | |
1690 | if (nfs4_in_grace()) | |
1691 | goto out; | |
1692 | if (!atomic_read(&cb->cb_set) || !sop->so_confirmed) | |
1693 | goto out; | |
1694 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | |
1695 | flag = NFS4_OPEN_DELEGATE_WRITE; | |
1696 | else | |
1697 | flag = NFS4_OPEN_DELEGATE_READ; | |
1698 | break; | |
1699 | default: | |
1700 | goto out; | |
1701 | } | |
1da177e4 LT |
1702 | |
1703 | dp = alloc_init_deleg(sop->so_client, stp, fh, flag); | |
1704 | if (dp == NULL) { | |
1705 | flag = NFS4_OPEN_DELEGATE_NONE; | |
1706 | goto out; | |
1707 | } | |
1708 | locks_init_lock(&fl); | |
1709 | fl.fl_lmops = &nfsd_lease_mng_ops; | |
1710 | fl.fl_flags = FL_LEASE; | |
1711 | fl.fl_end = OFFSET_MAX; | |
1712 | fl.fl_owner = (fl_owner_t)dp; | |
1713 | fl.fl_file = stp->st_vfs_file; | |
1714 | fl.fl_pid = current->tgid; | |
1715 | ||
1716 | /* setlease checks to see if delegation should be handed out. | |
1717 | * the lock_manager callbacks fl_mylease and fl_change are used | |
1718 | */ | |
1719 | if ((status = setlease(stp->st_vfs_file, | |
1720 | flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK, &flp))) { | |
1721 | dprintk("NFSD: setlease failed [%d], no delegation\n", status); | |
c907132d | 1722 | unhash_delegation(dp); |
1da177e4 LT |
1723 | flag = NFS4_OPEN_DELEGATE_NONE; |
1724 | goto out; | |
1725 | } | |
1726 | ||
1727 | memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); | |
1728 | ||
1729 | dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n", | |
1730 | dp->dl_stateid.si_boot, | |
1731 | dp->dl_stateid.si_stateownerid, | |
1732 | dp->dl_stateid.si_fileid, | |
1733 | dp->dl_stateid.si_generation); | |
1734 | out: | |
7b190fec N |
1735 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS |
1736 | && flag == NFS4_OPEN_DELEGATE_NONE | |
1737 | && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) | |
1738 | printk("NFSD: WARNING: refusing delegation reclaim\n"); | |
1da177e4 LT |
1739 | open->op_delegate_type = flag; |
1740 | } | |
1741 | ||
1742 | /* | |
1743 | * called with nfs4_lock_state() held. | |
1744 | */ | |
1745 | int | |
1746 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) | |
1747 | { | |
1748 | struct nfs4_file *fp = NULL; | |
1749 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
1750 | struct nfs4_stateid *stp = NULL; | |
567d9829 | 1751 | struct nfs4_delegation *dp = NULL; |
1da177e4 LT |
1752 | int status; |
1753 | ||
1754 | status = nfserr_inval; | |
ba5a6a19 BF |
1755 | if (!access_valid(open->op_share_access) |
1756 | || !deny_valid(open->op_share_deny)) | |
1da177e4 LT |
1757 | goto out; |
1758 | /* | |
1759 | * Lookup file; if found, lookup stateid and check open request, | |
1760 | * and check for delegations in the process of being recalled. | |
1761 | * If not found, create the nfs4_file struct | |
1762 | */ | |
1763 | fp = find_file(ino); | |
1764 | if (fp) { | |
1765 | if ((status = nfs4_check_open(fp, open, &stp))) | |
1766 | goto out; | |
c44c5eeb N |
1767 | status = nfs4_check_deleg(fp, open, &dp); |
1768 | if (status) | |
1769 | goto out; | |
1da177e4 | 1770 | } else { |
c44c5eeb N |
1771 | status = nfserr_bad_stateid; |
1772 | if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
1773 | goto out; | |
1da177e4 LT |
1774 | status = nfserr_resource; |
1775 | fp = alloc_init_file(ino); | |
1776 | if (fp == NULL) | |
1777 | goto out; | |
1778 | } | |
1779 | ||
1780 | /* | |
1781 | * OPEN the file, or upgrade an existing OPEN. | |
1782 | * If truncate fails, the OPEN fails. | |
1783 | */ | |
1784 | if (stp) { | |
1785 | /* Stateid was found, this is an OPEN upgrade */ | |
1786 | status = nfs4_upgrade_open(rqstp, current_fh, stp, open); | |
1787 | if (status) | |
1788 | goto out; | |
444c2c07 | 1789 | update_stateid(&stp->st_stateid); |
1da177e4 LT |
1790 | } else { |
1791 | /* Stateid was not found, this is a new OPEN */ | |
1792 | int flags = 0; | |
9ecb6a08 BF |
1793 | if (open->op_share_access & NFS4_SHARE_ACCESS_READ) |
1794 | flags |= MAY_READ; | |
1da177e4 | 1795 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
9ecb6a08 | 1796 | flags |= MAY_WRITE; |
567d9829 N |
1797 | status = nfs4_new_open(rqstp, &stp, dp, current_fh, flags); |
1798 | if (status) | |
1da177e4 LT |
1799 | goto out; |
1800 | init_stateid(stp, fp, open); | |
1801 | status = nfsd4_truncate(rqstp, current_fh, open); | |
1802 | if (status) { | |
1803 | release_stateid(stp, OPEN_STATE); | |
1804 | goto out; | |
1805 | } | |
1806 | } | |
1807 | memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
1808 | ||
1809 | /* | |
1810 | * Attempt to hand out a delegation. No error return, because the | |
1811 | * OPEN succeeds even if we fail. | |
1812 | */ | |
1813 | nfs4_open_delegation(current_fh, open, stp); | |
1814 | ||
1815 | status = nfs_ok; | |
1816 | ||
1817 | dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n", | |
1818 | stp->st_stateid.si_boot, stp->st_stateid.si_stateownerid, | |
1819 | stp->st_stateid.si_fileid, stp->st_stateid.si_generation); | |
1820 | out: | |
13cd2184 N |
1821 | if (fp) |
1822 | put_nfs4_file(fp); | |
37515177 N |
1823 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
1824 | nfs4_set_claim_prev(open); | |
1da177e4 LT |
1825 | /* |
1826 | * To finish the open response, we just need to set the rflags. | |
1827 | */ | |
1828 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
1829 | if (!open->op_stateowner->so_confirmed) | |
1830 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; | |
1831 | ||
1832 | return status; | |
1833 | } | |
1834 | ||
58da282b | 1835 | static struct workqueue_struct *laundry_wq; |
1da177e4 LT |
1836 | static struct work_struct laundromat_work; |
1837 | static void laundromat_main(void *); | |
1838 | static DECLARE_WORK(laundromat_work, laundromat_main, NULL); | |
1839 | ||
1840 | int | |
1841 | nfsd4_renew(clientid_t *clid) | |
1842 | { | |
1843 | struct nfs4_client *clp; | |
1844 | int status; | |
1845 | ||
1846 | nfs4_lock_state(); | |
1847 | dprintk("process_renew(%08x/%08x): starting\n", | |
1848 | clid->cl_boot, clid->cl_id); | |
1849 | status = nfserr_stale_clientid; | |
1850 | if (STALE_CLIENTID(clid)) | |
1851 | goto out; | |
1852 | clp = find_confirmed_client(clid); | |
1853 | status = nfserr_expired; | |
1854 | if (clp == NULL) { | |
1855 | /* We assume the client took too long to RENEW. */ | |
1856 | dprintk("nfsd4_renew: clientid not found!\n"); | |
1857 | goto out; | |
1858 | } | |
1859 | renew_client(clp); | |
1860 | status = nfserr_cb_path_down; | |
ea1da636 | 1861 | if (!list_empty(&clp->cl_delegations) |
1da177e4 LT |
1862 | && !atomic_read(&clp->cl_callback.cb_set)) |
1863 | goto out; | |
1864 | status = nfs_ok; | |
1865 | out: | |
1866 | nfs4_unlock_state(); | |
1867 | return status; | |
1868 | } | |
1869 | ||
a76b4319 N |
1870 | static void |
1871 | end_grace(void) | |
1872 | { | |
1873 | dprintk("NFSD: end of grace period\n"); | |
c7b9a459 | 1874 | nfsd4_recdir_purge_old(); |
a76b4319 N |
1875 | in_grace = 0; |
1876 | } | |
1877 | ||
fd39ca9a | 1878 | static time_t |
1da177e4 LT |
1879 | nfs4_laundromat(void) |
1880 | { | |
1881 | struct nfs4_client *clp; | |
1882 | struct nfs4_stateowner *sop; | |
1883 | struct nfs4_delegation *dp; | |
1884 | struct list_head *pos, *next, reaplist; | |
1885 | time_t cutoff = get_seconds() - NFSD_LEASE_TIME; | |
1886 | time_t t, clientid_val = NFSD_LEASE_TIME; | |
1887 | time_t u, test_val = NFSD_LEASE_TIME; | |
1888 | ||
1889 | nfs4_lock_state(); | |
1890 | ||
1891 | dprintk("NFSD: laundromat service - starting\n"); | |
a76b4319 N |
1892 | if (in_grace) |
1893 | end_grace(); | |
1da177e4 LT |
1894 | list_for_each_safe(pos, next, &client_lru) { |
1895 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1896 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
1897 | t = clp->cl_time - cutoff; | |
1898 | if (clientid_val > t) | |
1899 | clientid_val = t; | |
1900 | break; | |
1901 | } | |
1902 | dprintk("NFSD: purging unused client (clientid %08x)\n", | |
1903 | clp->cl_clientid.cl_id); | |
c7b9a459 | 1904 | nfsd4_remove_clid_dir(clp); |
1da177e4 LT |
1905 | expire_client(clp); |
1906 | } | |
1907 | INIT_LIST_HEAD(&reaplist); | |
1908 | spin_lock(&recall_lock); | |
1909 | list_for_each_safe(pos, next, &del_recall_lru) { | |
1910 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
1911 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
1912 | u = dp->dl_time - cutoff; | |
1913 | if (test_val > u) | |
1914 | test_val = u; | |
1915 | break; | |
1916 | } | |
1917 | dprintk("NFSD: purging unused delegation dp %p, fp %p\n", | |
1918 | dp, dp->dl_flock); | |
1919 | list_move(&dp->dl_recall_lru, &reaplist); | |
1920 | } | |
1921 | spin_unlock(&recall_lock); | |
1922 | list_for_each_safe(pos, next, &reaplist) { | |
1923 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
1924 | list_del_init(&dp->dl_recall_lru); | |
1925 | unhash_delegation(dp); | |
1926 | } | |
1927 | test_val = NFSD_LEASE_TIME; | |
1928 | list_for_each_safe(pos, next, &close_lru) { | |
1929 | sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); | |
1930 | if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { | |
1931 | u = sop->so_time - cutoff; | |
1932 | if (test_val > u) | |
1933 | test_val = u; | |
1934 | break; | |
1935 | } | |
1936 | dprintk("NFSD: purging unused open stateowner (so_id %d)\n", | |
1937 | sop->so_id); | |
358dd55a | 1938 | release_stateowner(sop); |
1da177e4 LT |
1939 | } |
1940 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
1941 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
1942 | nfs4_unlock_state(); | |
1943 | return clientid_val; | |
1944 | } | |
1945 | ||
1946 | void | |
1947 | laundromat_main(void *not_used) | |
1948 | { | |
1949 | time_t t; | |
1950 | ||
1951 | t = nfs4_laundromat(); | |
1952 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); | |
58da282b | 1953 | queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); |
1da177e4 LT |
1954 | } |
1955 | ||
fd39ca9a | 1956 | static struct nfs4_stateowner * |
f8816512 N |
1957 | search_close_lru(u32 st_id, int flags) |
1958 | { | |
1da177e4 LT |
1959 | struct nfs4_stateowner *local = NULL; |
1960 | ||
1da177e4 LT |
1961 | if (flags & CLOSE_STATE) { |
1962 | list_for_each_entry(local, &close_lru, so_close_lru) { | |
1963 | if (local->so_id == st_id) | |
1964 | return local; | |
1965 | } | |
1966 | } | |
1967 | return NULL; | |
1968 | } | |
1969 | ||
1970 | static inline int | |
1971 | nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) | |
1972 | { | |
1973 | return fhp->fh_dentry->d_inode != stp->st_vfs_file->f_dentry->d_inode; | |
1974 | } | |
1975 | ||
1976 | static int | |
1977 | STALE_STATEID(stateid_t *stateid) | |
1978 | { | |
1979 | if (stateid->si_boot == boot_time) | |
1980 | return 0; | |
849823c5 | 1981 | dprintk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n", |
1da177e4 LT |
1982 | stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, |
1983 | stateid->si_generation); | |
1984 | return 1; | |
1985 | } | |
1986 | ||
1987 | static inline int | |
1988 | access_permit_read(unsigned long access_bmap) | |
1989 | { | |
1990 | return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || | |
1991 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || | |
1992 | test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); | |
1993 | } | |
1994 | ||
1995 | static inline int | |
1996 | access_permit_write(unsigned long access_bmap) | |
1997 | { | |
1998 | return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || | |
1999 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); | |
2000 | } | |
2001 | ||
2002 | static | |
2003 | int nfs4_check_openmode(struct nfs4_stateid *stp, int flags) | |
2004 | { | |
2005 | int status = nfserr_openmode; | |
2006 | ||
2007 | if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) | |
2008 | goto out; | |
2009 | if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) | |
2010 | goto out; | |
2011 | status = nfs_ok; | |
2012 | out: | |
2013 | return status; | |
2014 | } | |
2015 | ||
1da177e4 LT |
2016 | static inline int |
2017 | check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) | |
2018 | { | |
2019 | /* Trying to call delegreturn with a special stateid? Yuch: */ | |
2020 | if (!(flags & (RD_STATE | WR_STATE))) | |
2021 | return nfserr_bad_stateid; | |
2022 | else if (ONE_STATEID(stateid) && (flags & RD_STATE)) | |
2023 | return nfs_ok; | |
2024 | else if (nfs4_in_grace()) { | |
2025 | /* Answer in remaining cases depends on existance of | |
2026 | * conflicting state; so we must wait out the grace period. */ | |
2027 | return nfserr_grace; | |
2028 | } else if (flags & WR_STATE) | |
2029 | return nfs4_share_conflict(current_fh, | |
2030 | NFS4_SHARE_DENY_WRITE); | |
2031 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
2032 | return nfs4_share_conflict(current_fh, | |
2033 | NFS4_SHARE_DENY_READ); | |
2034 | } | |
2035 | ||
2036 | /* | |
2037 | * Allow READ/WRITE during grace period on recovered state only for files | |
2038 | * that are not able to provide mandatory locking. | |
2039 | */ | |
2040 | static inline int | |
2041 | io_during_grace_disallowed(struct inode *inode, int flags) | |
2042 | { | |
2043 | return nfs4_in_grace() && (flags & (RD_STATE | WR_STATE)) | |
2044 | && MANDATORY_LOCK(inode); | |
2045 | } | |
2046 | ||
2047 | /* | |
2048 | * Checks for stateid operations | |
2049 | */ | |
2050 | int | |
2051 | nfs4_preprocess_stateid_op(struct svc_fh *current_fh, stateid_t *stateid, int flags, struct file **filpp) | |
2052 | { | |
2053 | struct nfs4_stateid *stp = NULL; | |
2054 | struct nfs4_delegation *dp = NULL; | |
2055 | stateid_t *stidp; | |
2056 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2057 | int status; | |
2058 | ||
2059 | dprintk("NFSD: preprocess_stateid_op: stateid = (%08x/%08x/%08x/%08x)\n", | |
2060 | stateid->si_boot, stateid->si_stateownerid, | |
2061 | stateid->si_fileid, stateid->si_generation); | |
2062 | if (filpp) | |
2063 | *filpp = NULL; | |
2064 | ||
2065 | if (io_during_grace_disallowed(ino, flags)) | |
2066 | return nfserr_grace; | |
2067 | ||
2068 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
2069 | return check_special_stateids(current_fh, stateid, flags); | |
2070 | ||
2071 | /* STALE STATEID */ | |
2072 | status = nfserr_stale_stateid; | |
2073 | if (STALE_STATEID(stateid)) | |
2074 | goto out; | |
2075 | ||
2076 | /* BAD STATEID */ | |
2077 | status = nfserr_bad_stateid; | |
2078 | if (!stateid->si_fileid) { /* delegation stateid */ | |
2079 | if(!(dp = find_delegation_stateid(ino, stateid))) { | |
2080 | dprintk("NFSD: delegation stateid not found\n"); | |
1da177e4 LT |
2081 | goto out; |
2082 | } | |
2083 | stidp = &dp->dl_stateid; | |
2084 | } else { /* open or lock stateid */ | |
2085 | if (!(stp = find_stateid(stateid, flags))) { | |
2086 | dprintk("NFSD: open or lock stateid not found\n"); | |
1da177e4 LT |
2087 | goto out; |
2088 | } | |
2089 | if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp)) | |
2090 | goto out; | |
2091 | if (!stp->st_stateowner->so_confirmed) | |
2092 | goto out; | |
2093 | stidp = &stp->st_stateid; | |
2094 | } | |
2095 | if (stateid->si_generation > stidp->si_generation) | |
2096 | goto out; | |
2097 | ||
2098 | /* OLD STATEID */ | |
2099 | status = nfserr_old_stateid; | |
2100 | if (stateid->si_generation < stidp->si_generation) | |
2101 | goto out; | |
2102 | if (stp) { | |
2103 | if ((status = nfs4_check_openmode(stp,flags))) | |
2104 | goto out; | |
2105 | renew_client(stp->st_stateowner->so_client); | |
2106 | if (filpp) | |
2107 | *filpp = stp->st_vfs_file; | |
2108 | } else if (dp) { | |
2109 | if ((status = nfs4_check_delegmode(dp, flags))) | |
2110 | goto out; | |
2111 | renew_client(dp->dl_client); | |
2112 | if (flags & DELEG_RET) | |
2113 | unhash_delegation(dp); | |
2114 | if (filpp) | |
2115 | *filpp = dp->dl_vfs_file; | |
2116 | } | |
2117 | status = nfs_ok; | |
2118 | out: | |
2119 | return status; | |
2120 | } | |
2121 | ||
4c4cd222 N |
2122 | static inline int |
2123 | setlkflg (int type) | |
2124 | { | |
2125 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
2126 | RD_STATE : WR_STATE; | |
2127 | } | |
1da177e4 LT |
2128 | |
2129 | /* | |
2130 | * Checks for sequence id mutating operations. | |
2131 | */ | |
fd39ca9a | 2132 | static int |
4c4cd222 | 2133 | 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 | 2134 | { |
1da177e4 LT |
2135 | struct nfs4_stateid *stp; |
2136 | struct nfs4_stateowner *sop; | |
2137 | ||
2138 | dprintk("NFSD: preprocess_seqid_op: seqid=%d " | |
2139 | "stateid = (%08x/%08x/%08x/%08x)\n", seqid, | |
2140 | stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, | |
2141 | stateid->si_generation); | |
3a4f98bb | 2142 | |
1da177e4 LT |
2143 | *stpp = NULL; |
2144 | *sopp = NULL; | |
2145 | ||
1da177e4 LT |
2146 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { |
2147 | printk("NFSD: preprocess_seqid_op: magic stateid!\n"); | |
3a4f98bb | 2148 | return nfserr_bad_stateid; |
1da177e4 LT |
2149 | } |
2150 | ||
1da177e4 | 2151 | if (STALE_STATEID(stateid)) |
3a4f98bb | 2152 | return nfserr_stale_stateid; |
1da177e4 LT |
2153 | /* |
2154 | * We return BAD_STATEID if filehandle doesn't match stateid, | |
2155 | * the confirmed flag is incorrecly set, or the generation | |
2156 | * number is incorrect. | |
1da177e4 | 2157 | */ |
f8816512 N |
2158 | stp = find_stateid(stateid, flags); |
2159 | if (stp == NULL) { | |
2160 | /* | |
2161 | * Also, we should make sure this isn't just the result of | |
2162 | * a replayed close: | |
2163 | */ | |
2164 | sop = search_close_lru(stateid->si_stateownerid, flags); | |
2165 | if (sop == NULL) | |
2166 | return nfserr_bad_stateid; | |
2167 | *sopp = sop; | |
2168 | goto check_replay; | |
2169 | } | |
1da177e4 | 2170 | |
4c4cd222 | 2171 | if (lock) { |
1da177e4 | 2172 | struct nfs4_stateowner *sop = stp->st_stateowner; |
4c4cd222 | 2173 | clientid_t *lockclid = &lock->v.new.clientid; |
1da177e4 | 2174 | struct nfs4_client *clp = sop->so_client; |
4c4cd222 N |
2175 | int lkflg = 0; |
2176 | int status; | |
2177 | ||
2178 | lkflg = setlkflg(lock->lk_type); | |
2179 | ||
2180 | if (lock->lk_is_new) { | |
2181 | if (!sop->so_is_open_owner) | |
2182 | return nfserr_bad_stateid; | |
2183 | if (!cmp_clid(&clp->cl_clientid, lockclid)) | |
2184 | return nfserr_bad_stateid; | |
2185 | /* stp is the open stateid */ | |
2186 | status = nfs4_check_openmode(stp, lkflg); | |
2187 | if (status) | |
2188 | return status; | |
2189 | } else { | |
2190 | /* stp is the lock stateid */ | |
2191 | status = nfs4_check_openmode(stp->st_openstp, lkflg); | |
2192 | if (status) | |
2193 | return status; | |
2194 | } | |
1da177e4 | 2195 | |
1da177e4 LT |
2196 | } |
2197 | ||
2198 | if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp)) { | |
2199 | printk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); | |
3a4f98bb | 2200 | return nfserr_bad_stateid; |
1da177e4 LT |
2201 | } |
2202 | ||
2203 | *stpp = stp; | |
2204 | *sopp = sop = stp->st_stateowner; | |
2205 | ||
2206 | /* | |
2207 | * We now validate the seqid and stateid generation numbers. | |
2208 | * For the moment, we ignore the possibility of | |
2209 | * generation number wraparound. | |
2210 | */ | |
bd9aac52 | 2211 | if (seqid != sop->so_seqid) |
1da177e4 LT |
2212 | goto check_replay; |
2213 | ||
3a4f98bb N |
2214 | if (sop->so_confirmed && flags & CONFIRM) { |
2215 | printk("NFSD: preprocess_seqid_op: expected" | |
2216 | " unconfirmed stateowner!\n"); | |
2217 | return nfserr_bad_stateid; | |
1da177e4 | 2218 | } |
3a4f98bb N |
2219 | if (!sop->so_confirmed && !(flags & CONFIRM)) { |
2220 | printk("NFSD: preprocess_seqid_op: stateowner not" | |
2221 | " confirmed yet!\n"); | |
2222 | return nfserr_bad_stateid; | |
1da177e4 LT |
2223 | } |
2224 | if (stateid->si_generation > stp->st_stateid.si_generation) { | |
2225 | printk("NFSD: preprocess_seqid_op: future stateid?!\n"); | |
3a4f98bb | 2226 | return nfserr_bad_stateid; |
1da177e4 LT |
2227 | } |
2228 | ||
1da177e4 LT |
2229 | if (stateid->si_generation < stp->st_stateid.si_generation) { |
2230 | printk("NFSD: preprocess_seqid_op: old stateid!\n"); | |
3a4f98bb | 2231 | return nfserr_old_stateid; |
1da177e4 | 2232 | } |
52fd004e | 2233 | renew_client(sop->so_client); |
3a4f98bb | 2234 | return nfs_ok; |
1da177e4 | 2235 | |
1da177e4 | 2236 | check_replay: |
bd9aac52 | 2237 | if (seqid == sop->so_seqid - 1) { |
849823c5 | 2238 | dprintk("NFSD: preprocess_seqid_op: retransmission?\n"); |
1da177e4 | 2239 | /* indicate replay to calling function */ |
3a4f98bb | 2240 | return NFSERR_REPLAY_ME; |
1da177e4 | 2241 | } |
3a4f98bb N |
2242 | printk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n", |
2243 | sop->so_seqid, seqid); | |
2244 | *sopp = NULL; | |
2245 | return nfserr_bad_seqid; | |
1da177e4 LT |
2246 | } |
2247 | ||
2248 | int | |
f2327d9a | 2249 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open_confirm *oc, struct nfs4_stateowner **replay_owner) |
1da177e4 LT |
2250 | { |
2251 | int status; | |
2252 | struct nfs4_stateowner *sop; | |
2253 | struct nfs4_stateid *stp; | |
2254 | ||
2255 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | |
2256 | (int)current_fh->fh_dentry->d_name.len, | |
2257 | current_fh->fh_dentry->d_name.name); | |
2258 | ||
a8cddc5d BF |
2259 | status = fh_verify(rqstp, current_fh, S_IFREG, 0); |
2260 | if (status) | |
2261 | return status; | |
1da177e4 LT |
2262 | |
2263 | nfs4_lock_state(); | |
2264 | ||
2265 | if ((status = nfs4_preprocess_seqid_op(current_fh, oc->oc_seqid, | |
2266 | &oc->oc_req_stateid, | |
2267 | CHECK_FH | CONFIRM | OPEN_STATE, | |
2268 | &oc->oc_stateowner, &stp, NULL))) | |
2269 | goto out; | |
2270 | ||
2271 | sop = oc->oc_stateowner; | |
2272 | sop->so_confirmed = 1; | |
2273 | update_stateid(&stp->st_stateid); | |
2274 | memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2275 | dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d " | |
2276 | "stateid=(%08x/%08x/%08x/%08x)\n", oc->oc_seqid, | |
2277 | stp->st_stateid.si_boot, | |
2278 | stp->st_stateid.si_stateownerid, | |
2279 | stp->st_stateid.si_fileid, | |
2280 | stp->st_stateid.si_generation); | |
c7b9a459 N |
2281 | |
2282 | nfsd4_create_clid_dir(sop->so_client); | |
1da177e4 | 2283 | out: |
f2327d9a | 2284 | if (oc->oc_stateowner) { |
1da177e4 | 2285 | nfs4_get_stateowner(oc->oc_stateowner); |
f2327d9a NB |
2286 | *replay_owner = oc->oc_stateowner; |
2287 | } | |
1da177e4 LT |
2288 | nfs4_unlock_state(); |
2289 | return status; | |
2290 | } | |
2291 | ||
2292 | ||
2293 | /* | |
2294 | * unset all bits in union bitmap (bmap) that | |
2295 | * do not exist in share (from successful OPEN_DOWNGRADE) | |
2296 | */ | |
2297 | static void | |
2298 | reset_union_bmap_access(unsigned long access, unsigned long *bmap) | |
2299 | { | |
2300 | int i; | |
2301 | for (i = 1; i < 4; i++) { | |
2302 | if ((i & access) != i) | |
2303 | __clear_bit(i, bmap); | |
2304 | } | |
2305 | } | |
2306 | ||
2307 | static void | |
2308 | reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) | |
2309 | { | |
2310 | int i; | |
2311 | for (i = 0; i < 4; i++) { | |
2312 | if ((i & deny) != i) | |
2313 | __clear_bit(i, bmap); | |
2314 | } | |
2315 | } | |
2316 | ||
2317 | int | |
f2327d9a | 2318 | nfsd4_open_downgrade(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open_downgrade *od, struct nfs4_stateowner **replay_owner) |
1da177e4 LT |
2319 | { |
2320 | int status; | |
2321 | struct nfs4_stateid *stp; | |
2322 | unsigned int share_access; | |
2323 | ||
2324 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | |
2325 | (int)current_fh->fh_dentry->d_name.len, | |
2326 | current_fh->fh_dentry->d_name.name); | |
2327 | ||
ba5a6a19 BF |
2328 | if (!access_valid(od->od_share_access) |
2329 | || !deny_valid(od->od_share_deny)) | |
1da177e4 LT |
2330 | return nfserr_inval; |
2331 | ||
2332 | nfs4_lock_state(); | |
2333 | if ((status = nfs4_preprocess_seqid_op(current_fh, od->od_seqid, | |
2334 | &od->od_stateid, | |
2335 | CHECK_FH | OPEN_STATE, | |
2336 | &od->od_stateowner, &stp, NULL))) | |
2337 | goto out; | |
2338 | ||
2339 | status = nfserr_inval; | |
2340 | if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { | |
2341 | dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
2342 | stp->st_access_bmap, od->od_share_access); | |
2343 | goto out; | |
2344 | } | |
2345 | if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { | |
2346 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", | |
2347 | stp->st_deny_bmap, od->od_share_deny); | |
2348 | goto out; | |
2349 | } | |
2350 | set_access(&share_access, stp->st_access_bmap); | |
2351 | nfs4_file_downgrade(stp->st_vfs_file, | |
2352 | share_access & ~od->od_share_access); | |
2353 | ||
2354 | reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap); | |
2355 | reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); | |
2356 | ||
2357 | update_stateid(&stp->st_stateid); | |
2358 | memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2359 | status = nfs_ok; | |
2360 | out: | |
f2327d9a | 2361 | if (od->od_stateowner) { |
1da177e4 | 2362 | nfs4_get_stateowner(od->od_stateowner); |
f2327d9a NB |
2363 | *replay_owner = od->od_stateowner; |
2364 | } | |
1da177e4 LT |
2365 | nfs4_unlock_state(); |
2366 | return status; | |
2367 | } | |
2368 | ||
2369 | /* | |
2370 | * nfs4_unlock_state() called after encode | |
2371 | */ | |
2372 | int | |
f2327d9a | 2373 | nfsd4_close(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_close *close, struct nfs4_stateowner **replay_owner) |
1da177e4 LT |
2374 | { |
2375 | int status; | |
2376 | struct nfs4_stateid *stp; | |
2377 | ||
2378 | dprintk("NFSD: nfsd4_close on file %.*s\n", | |
2379 | (int)current_fh->fh_dentry->d_name.len, | |
2380 | current_fh->fh_dentry->d_name.name); | |
2381 | ||
2382 | nfs4_lock_state(); | |
2383 | /* check close_lru for replay */ | |
2384 | if ((status = nfs4_preprocess_seqid_op(current_fh, close->cl_seqid, | |
2385 | &close->cl_stateid, | |
2386 | CHECK_FH | OPEN_STATE | CLOSE_STATE, | |
2387 | &close->cl_stateowner, &stp, NULL))) | |
2388 | goto out; | |
1da177e4 LT |
2389 | status = nfs_ok; |
2390 | update_stateid(&stp->st_stateid); | |
2391 | memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2392 | ||
04ef5954 BF |
2393 | /* release_stateid() calls nfsd_close() if needed */ |
2394 | release_stateid(stp, OPEN_STATE); | |
2395 | ||
2396 | /* place unused nfs4_stateowners on so_close_lru list to be | |
2397 | * released by the laundromat service after the lease period | |
2398 | * to enable us to handle CLOSE replay | |
2399 | */ | |
2400 | if (list_empty(&close->cl_stateowner->so_stateids)) | |
2401 | move_to_close_lru(close->cl_stateowner); | |
1da177e4 | 2402 | out: |
f2327d9a | 2403 | if (close->cl_stateowner) { |
1da177e4 | 2404 | nfs4_get_stateowner(close->cl_stateowner); |
f2327d9a NB |
2405 | *replay_owner = close->cl_stateowner; |
2406 | } | |
1da177e4 LT |
2407 | nfs4_unlock_state(); |
2408 | return status; | |
2409 | } | |
2410 | ||
2411 | int | |
2412 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_delegreturn *dr) | |
2413 | { | |
2414 | int status; | |
2415 | ||
2416 | if ((status = fh_verify(rqstp, current_fh, S_IFREG, 0))) | |
2417 | goto out; | |
2418 | ||
2419 | nfs4_lock_state(); | |
2420 | status = nfs4_preprocess_stateid_op(current_fh, &dr->dr_stateid, DELEG_RET, NULL); | |
2421 | nfs4_unlock_state(); | |
2422 | out: | |
2423 | return status; | |
2424 | } | |
2425 | ||
2426 | ||
2427 | /* | |
2428 | * Lock owner state (byte-range locks) | |
2429 | */ | |
2430 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) | |
2431 | #define LOCK_HASH_BITS 8 | |
2432 | #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) | |
2433 | #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) | |
2434 | ||
2435 | #define lockownerid_hashval(id) \ | |
2436 | ((id) & LOCK_HASH_MASK) | |
2437 | ||
2438 | static inline unsigned int | |
2439 | lock_ownerstr_hashval(struct inode *inode, u32 cl_id, | |
2440 | struct xdr_netobj *ownername) | |
2441 | { | |
2442 | return (file_hashval(inode) + cl_id | |
2443 | + opaque_hashval(ownername->data, ownername->len)) | |
2444 | & LOCK_HASH_MASK; | |
2445 | } | |
2446 | ||
2447 | static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; | |
2448 | static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; | |
2449 | static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; | |
2450 | ||
fd39ca9a | 2451 | static struct nfs4_stateid * |
1da177e4 LT |
2452 | find_stateid(stateid_t *stid, int flags) |
2453 | { | |
2454 | struct nfs4_stateid *local = NULL; | |
2455 | u32 st_id = stid->si_stateownerid; | |
2456 | u32 f_id = stid->si_fileid; | |
2457 | unsigned int hashval; | |
2458 | ||
2459 | dprintk("NFSD: find_stateid flags 0x%x\n",flags); | |
2460 | if ((flags & LOCK_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) { | |
2461 | hashval = stateid_hashval(st_id, f_id); | |
2462 | list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { | |
2463 | if ((local->st_stateid.si_stateownerid == st_id) && | |
2464 | (local->st_stateid.si_fileid == f_id)) | |
2465 | return local; | |
2466 | } | |
2467 | } | |
2468 | if ((flags & OPEN_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) { | |
2469 | hashval = stateid_hashval(st_id, f_id); | |
2470 | list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { | |
2471 | if ((local->st_stateid.si_stateownerid == st_id) && | |
2472 | (local->st_stateid.si_fileid == f_id)) | |
2473 | return local; | |
2474 | } | |
849823c5 | 2475 | } |
1da177e4 LT |
2476 | return NULL; |
2477 | } | |
2478 | ||
2479 | static struct nfs4_delegation * | |
2480 | find_delegation_stateid(struct inode *ino, stateid_t *stid) | |
2481 | { | |
13cd2184 N |
2482 | struct nfs4_file *fp; |
2483 | struct nfs4_delegation *dl; | |
1da177e4 LT |
2484 | |
2485 | dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n", | |
2486 | stid->si_boot, stid->si_stateownerid, | |
2487 | stid->si_fileid, stid->si_generation); | |
2488 | ||
1da177e4 | 2489 | fp = find_file(ino); |
13cd2184 N |
2490 | if (!fp) |
2491 | return NULL; | |
2492 | dl = find_delegation_file(fp, stid); | |
2493 | put_nfs4_file(fp); | |
2494 | return dl; | |
1da177e4 LT |
2495 | } |
2496 | ||
2497 | /* | |
2498 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
2499 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
2500 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
2501 | * locking, this prevents us from being completely protocol-compliant. The | |
2502 | * real solution to this problem is to start using unsigned file offsets in | |
2503 | * the VFS, but this is a very deep change! | |
2504 | */ | |
2505 | static inline void | |
2506 | nfs4_transform_lock_offset(struct file_lock *lock) | |
2507 | { | |
2508 | if (lock->fl_start < 0) | |
2509 | lock->fl_start = OFFSET_MAX; | |
2510 | if (lock->fl_end < 0) | |
2511 | lock->fl_end = OFFSET_MAX; | |
2512 | } | |
2513 | ||
d5b9026a N |
2514 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
2515 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
e465a77f | 2516 | static struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 2517 | }; |
1da177e4 LT |
2518 | |
2519 | static inline void | |
2520 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
2521 | { | |
d5b9026a N |
2522 | struct nfs4_stateowner *sop; |
2523 | unsigned int hval; | |
1da177e4 | 2524 | |
d5b9026a N |
2525 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
2526 | sop = (struct nfs4_stateowner *) fl->fl_owner; | |
2527 | hval = lockownerid_hashval(sop->so_id); | |
1da177e4 LT |
2528 | kref_get(&sop->so_ref); |
2529 | deny->ld_sop = sop; | |
2530 | deny->ld_clientid = sop->so_client->cl_clientid; | |
d5b9026a N |
2531 | } else { |
2532 | deny->ld_sop = NULL; | |
2533 | deny->ld_clientid.cl_boot = 0; | |
2534 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
2535 | } |
2536 | deny->ld_start = fl->fl_start; | |
2537 | deny->ld_length = ~(u64)0; | |
2538 | if (fl->fl_end != ~(u64)0) | |
2539 | deny->ld_length = fl->fl_end - fl->fl_start + 1; | |
2540 | deny->ld_type = NFS4_READ_LT; | |
2541 | if (fl->fl_type != F_RDLCK) | |
2542 | deny->ld_type = NFS4_WRITE_LT; | |
2543 | } | |
2544 | ||
1da177e4 LT |
2545 | static struct nfs4_stateowner * |
2546 | find_lockstateowner_str(struct inode *inode, clientid_t *clid, | |
2547 | struct xdr_netobj *owner) | |
2548 | { | |
2549 | unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); | |
2550 | struct nfs4_stateowner *op; | |
2551 | ||
2552 | list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { | |
2553 | if (cmp_owner_str(op, owner, clid)) | |
2554 | return op; | |
2555 | } | |
2556 | return NULL; | |
2557 | } | |
2558 | ||
2559 | /* | |
2560 | * Alloc a lock owner structure. | |
2561 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
2562 | * occured. | |
2563 | * | |
2564 | * strhashval = lock_ownerstr_hashval | |
1da177e4 LT |
2565 | */ |
2566 | ||
2567 | static struct nfs4_stateowner * | |
2568 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { | |
2569 | struct nfs4_stateowner *sop; | |
2570 | struct nfs4_replay *rp; | |
2571 | unsigned int idhashval; | |
2572 | ||
2573 | if (!(sop = alloc_stateowner(&lock->lk_new_owner))) | |
2574 | return NULL; | |
2575 | idhashval = lockownerid_hashval(current_ownerid); | |
2576 | INIT_LIST_HEAD(&sop->so_idhash); | |
2577 | INIT_LIST_HEAD(&sop->so_strhash); | |
2578 | INIT_LIST_HEAD(&sop->so_perclient); | |
ea1da636 N |
2579 | INIT_LIST_HEAD(&sop->so_stateids); |
2580 | INIT_LIST_HEAD(&sop->so_perstateid); | |
1da177e4 LT |
2581 | INIT_LIST_HEAD(&sop->so_close_lru); /* not used */ |
2582 | sop->so_time = 0; | |
2583 | list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); | |
2584 | list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); | |
ea1da636 | 2585 | list_add(&sop->so_perstateid, &open_stp->st_lockowners); |
1da177e4 LT |
2586 | sop->so_is_open_owner = 0; |
2587 | sop->so_id = current_ownerid++; | |
2588 | sop->so_client = clp; | |
b59e3c0e NB |
2589 | /* It is the openowner seqid that will be incremented in encode in the |
2590 | * case of new lockowners; so increment the lock seqid manually: */ | |
2591 | sop->so_seqid = lock->lk_new_lock_seqid + 1; | |
1da177e4 LT |
2592 | sop->so_confirmed = 1; |
2593 | rp = &sop->so_replay; | |
de1ae286 | 2594 | rp->rp_status = nfserr_serverfault; |
1da177e4 LT |
2595 | rp->rp_buflen = 0; |
2596 | rp->rp_buf = rp->rp_ibuf; | |
2597 | return sop; | |
2598 | } | |
2599 | ||
fd39ca9a | 2600 | static struct nfs4_stateid * |
1da177e4 LT |
2601 | alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) |
2602 | { | |
2603 | struct nfs4_stateid *stp; | |
2604 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); | |
2605 | ||
5ac049ac N |
2606 | stp = nfs4_alloc_stateid(); |
2607 | if (stp == NULL) | |
1da177e4 LT |
2608 | goto out; |
2609 | INIT_LIST_HEAD(&stp->st_hash); | |
2610 | INIT_LIST_HEAD(&stp->st_perfile); | |
ea1da636 N |
2611 | INIT_LIST_HEAD(&stp->st_perstateowner); |
2612 | INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ | |
1da177e4 | 2613 | list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); |
8beefa24 | 2614 | list_add(&stp->st_perfile, &fp->fi_stateids); |
ea1da636 | 2615 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
1da177e4 | 2616 | stp->st_stateowner = sop; |
13cd2184 | 2617 | get_nfs4_file(fp); |
1da177e4 LT |
2618 | stp->st_file = fp; |
2619 | stp->st_stateid.si_boot = boot_time; | |
2620 | stp->st_stateid.si_stateownerid = sop->so_id; | |
2621 | stp->st_stateid.si_fileid = fp->fi_id; | |
2622 | stp->st_stateid.si_generation = 0; | |
2623 | stp->st_vfs_file = open_stp->st_vfs_file; /* FIXME refcount?? */ | |
2624 | stp->st_access_bmap = open_stp->st_access_bmap; | |
2625 | stp->st_deny_bmap = open_stp->st_deny_bmap; | |
4c4cd222 | 2626 | stp->st_openstp = open_stp; |
1da177e4 LT |
2627 | |
2628 | out: | |
2629 | return stp; | |
2630 | } | |
2631 | ||
fd39ca9a | 2632 | static int |
1da177e4 LT |
2633 | check_lock_length(u64 offset, u64 length) |
2634 | { | |
2635 | return ((length == 0) || ((length != ~(u64)0) && | |
2636 | LOFF_OVERFLOW(offset, length))); | |
2637 | } | |
2638 | ||
2639 | /* | |
2640 | * LOCK operation | |
2641 | */ | |
2642 | int | |
f2327d9a | 2643 | nfsd4_lock(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_lock *lock, struct nfs4_stateowner **replay_owner) |
1da177e4 | 2644 | { |
3e9e3dbe | 2645 | struct nfs4_stateowner *open_sop = NULL; |
b59e3c0e | 2646 | struct nfs4_stateowner *lock_sop = NULL; |
1da177e4 LT |
2647 | struct nfs4_stateid *lock_stp; |
2648 | struct file *filp; | |
2649 | struct file_lock file_lock; | |
8dc7c311 | 2650 | struct file_lock conflock; |
1da177e4 LT |
2651 | int status = 0; |
2652 | unsigned int strhashval; | |
2653 | ||
2654 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
2655 | (long long) lock->lk_offset, | |
2656 | (long long) lock->lk_length); | |
2657 | ||
1da177e4 LT |
2658 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
2659 | return nfserr_inval; | |
2660 | ||
a6f6ef2f AA |
2661 | if ((status = fh_verify(rqstp, current_fh, S_IFREG, MAY_LOCK))) { |
2662 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); | |
2663 | return status; | |
2664 | } | |
2665 | ||
1da177e4 LT |
2666 | nfs4_lock_state(); |
2667 | ||
2668 | if (lock->lk_is_new) { | |
893f8770 N |
2669 | /* |
2670 | * Client indicates that this is a new lockowner. | |
2671 | * Use open owner and open stateid to create lock owner and | |
2672 | * lock stateid. | |
2673 | */ | |
1da177e4 LT |
2674 | struct nfs4_stateid *open_stp = NULL; |
2675 | struct nfs4_file *fp; | |
2676 | ||
2677 | status = nfserr_stale_clientid; | |
849823c5 | 2678 | if (STALE_CLIENTID(&lock->lk_new_clientid)) |
1da177e4 | 2679 | goto out; |
1da177e4 | 2680 | |
1da177e4 LT |
2681 | /* validate and update open stateid and open seqid */ |
2682 | status = nfs4_preprocess_seqid_op(current_fh, | |
2683 | lock->lk_new_open_seqid, | |
2684 | &lock->lk_new_open_stateid, | |
2685 | CHECK_FH | OPEN_STATE, | |
3a65588a | 2686 | &lock->lk_replay_owner, &open_stp, |
b59e3c0e | 2687 | lock); |
37515177 | 2688 | if (status) |
1da177e4 | 2689 | goto out; |
3a65588a | 2690 | open_sop = lock->lk_replay_owner; |
1da177e4 LT |
2691 | /* create lockowner and lock stateid */ |
2692 | fp = open_stp->st_file; | |
2693 | strhashval = lock_ownerstr_hashval(fp->fi_inode, | |
2694 | open_sop->so_client->cl_clientid.cl_id, | |
2695 | &lock->v.new.owner); | |
3e9e3dbe N |
2696 | /* XXX: Do we need to check for duplicate stateowners on |
2697 | * the same file, or should they just be allowed (and | |
2698 | * create new stateids)? */ | |
1da177e4 | 2699 | status = nfserr_resource; |
b59e3c0e NB |
2700 | lock_sop = alloc_init_lock_stateowner(strhashval, |
2701 | open_sop->so_client, open_stp, lock); | |
2702 | if (lock_sop == NULL) | |
1da177e4 | 2703 | goto out; |
b59e3c0e | 2704 | lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); |
8a280510 | 2705 | if (lock_stp == NULL) |
1da177e4 | 2706 | goto out; |
1da177e4 LT |
2707 | } else { |
2708 | /* lock (lock owner + lock stateid) already exists */ | |
2709 | status = nfs4_preprocess_seqid_op(current_fh, | |
2710 | lock->lk_old_lock_seqid, | |
2711 | &lock->lk_old_lock_stateid, | |
2712 | CHECK_FH | LOCK_STATE, | |
3a65588a | 2713 | &lock->lk_replay_owner, &lock_stp, lock); |
1da177e4 LT |
2714 | if (status) |
2715 | goto out; | |
3a65588a | 2716 | lock_sop = lock->lk_replay_owner; |
1da177e4 | 2717 | } |
3a65588a | 2718 | /* lock->lk_replay_owner and lock_stp have been created or found */ |
1da177e4 LT |
2719 | filp = lock_stp->st_vfs_file; |
2720 | ||
0dd395dc N |
2721 | status = nfserr_grace; |
2722 | if (nfs4_in_grace() && !lock->lk_reclaim) | |
2723 | goto out; | |
2724 | status = nfserr_no_grace; | |
2725 | if (!nfs4_in_grace() && lock->lk_reclaim) | |
2726 | goto out; | |
2727 | ||
1da177e4 LT |
2728 | locks_init_lock(&file_lock); |
2729 | switch (lock->lk_type) { | |
2730 | case NFS4_READ_LT: | |
2731 | case NFS4_READW_LT: | |
2732 | file_lock.fl_type = F_RDLCK; | |
2733 | break; | |
2734 | case NFS4_WRITE_LT: | |
2735 | case NFS4_WRITEW_LT: | |
2736 | file_lock.fl_type = F_WRLCK; | |
2737 | break; | |
2738 | default: | |
2739 | status = nfserr_inval; | |
2740 | goto out; | |
2741 | } | |
b59e3c0e | 2742 | file_lock.fl_owner = (fl_owner_t)lock_sop; |
1da177e4 LT |
2743 | file_lock.fl_pid = current->tgid; |
2744 | file_lock.fl_file = filp; | |
2745 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 2746 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
2747 | |
2748 | file_lock.fl_start = lock->lk_offset; | |
2749 | if ((lock->lk_length == ~(u64)0) || | |
2750 | LOFF_OVERFLOW(lock->lk_offset, lock->lk_length)) | |
2751 | file_lock.fl_end = ~(u64)0; | |
2752 | else | |
2753 | file_lock.fl_end = lock->lk_offset + lock->lk_length - 1; | |
2754 | nfs4_transform_lock_offset(&file_lock); | |
2755 | ||
2756 | /* | |
2757 | * Try to lock the file in the VFS. | |
2758 | * Note: locks.c uses the BKL to protect the inode's lock list. | |
2759 | */ | |
2760 | ||
eb76b3fd AA |
2761 | /* XXX?: Just to divert the locks_release_private at the start of |
2762 | * locks_copy_lock: */ | |
2763 | conflock.fl_ops = NULL; | |
2764 | conflock.fl_lmops = NULL; | |
2765 | status = posix_lock_file_conf(filp, &file_lock, &conflock); | |
2766 | dprintk("NFSD: nfsd4_lock: posix_lock_file_conf status %d\n",status); | |
1da177e4 LT |
2767 | switch (-status) { |
2768 | case 0: /* success! */ | |
2769 | update_stateid(&lock_stp->st_stateid); | |
2770 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, | |
2771 | sizeof(stateid_t)); | |
eb76b3fd AA |
2772 | break; |
2773 | case (EAGAIN): /* conflock holds conflicting lock */ | |
2774 | status = nfserr_denied; | |
2775 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
2776 | nfs4_set_lock_denied(&conflock, &lock->lk_denied); | |
2777 | break; | |
1da177e4 LT |
2778 | case (EDEADLK): |
2779 | status = nfserr_deadlock; | |
eb76b3fd | 2780 | break; |
1da177e4 | 2781 | default: |
eb76b3fd AA |
2782 | dprintk("NFSD: nfsd4_lock: posix_lock_file_conf() failed! status %d\n",status); |
2783 | status = nfserr_resource; | |
2784 | break; | |
1da177e4 | 2785 | } |
1da177e4 | 2786 | out: |
8a280510 BF |
2787 | if (status && lock->lk_is_new && lock_sop) |
2788 | release_stateowner(lock_sop); | |
3a65588a BF |
2789 | if (lock->lk_replay_owner) { |
2790 | nfs4_get_stateowner(lock->lk_replay_owner); | |
2791 | *replay_owner = lock->lk_replay_owner; | |
f2327d9a | 2792 | } |
1da177e4 LT |
2793 | nfs4_unlock_state(); |
2794 | return status; | |
2795 | } | |
2796 | ||
2797 | /* | |
2798 | * LOCKT operation | |
2799 | */ | |
2800 | int | |
2801 | nfsd4_lockt(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_lockt *lockt) | |
2802 | { | |
2803 | struct inode *inode; | |
2804 | struct file file; | |
2805 | struct file_lock file_lock; | |
8dc7c311 | 2806 | struct file_lock conflock; |
1da177e4 LT |
2807 | int status; |
2808 | ||
2809 | if (nfs4_in_grace()) | |
2810 | return nfserr_grace; | |
2811 | ||
2812 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
2813 | return nfserr_inval; | |
2814 | ||
2815 | lockt->lt_stateowner = NULL; | |
2816 | nfs4_lock_state(); | |
2817 | ||
2818 | status = nfserr_stale_clientid; | |
849823c5 | 2819 | if (STALE_CLIENTID(&lockt->lt_clientid)) |
1da177e4 | 2820 | goto out; |
1da177e4 LT |
2821 | |
2822 | if ((status = fh_verify(rqstp, current_fh, S_IFREG, 0))) { | |
849823c5 | 2823 | dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n"); |
1da177e4 LT |
2824 | if (status == nfserr_symlink) |
2825 | status = nfserr_inval; | |
2826 | goto out; | |
2827 | } | |
2828 | ||
2829 | inode = current_fh->fh_dentry->d_inode; | |
2830 | locks_init_lock(&file_lock); | |
2831 | switch (lockt->lt_type) { | |
2832 | case NFS4_READ_LT: | |
2833 | case NFS4_READW_LT: | |
2834 | file_lock.fl_type = F_RDLCK; | |
2835 | break; | |
2836 | case NFS4_WRITE_LT: | |
2837 | case NFS4_WRITEW_LT: | |
2838 | file_lock.fl_type = F_WRLCK; | |
2839 | break; | |
2840 | default: | |
2841 | printk("NFSD: nfs4_lockt: bad lock type!\n"); | |
2842 | status = nfserr_inval; | |
2843 | goto out; | |
2844 | } | |
2845 | ||
2846 | lockt->lt_stateowner = find_lockstateowner_str(inode, | |
2847 | &lockt->lt_clientid, &lockt->lt_owner); | |
2848 | if (lockt->lt_stateowner) | |
2849 | file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; | |
2850 | file_lock.fl_pid = current->tgid; | |
2851 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 2852 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
2853 | |
2854 | file_lock.fl_start = lockt->lt_offset; | |
2855 | if ((lockt->lt_length == ~(u64)0) || LOFF_OVERFLOW(lockt->lt_offset, lockt->lt_length)) | |
2856 | file_lock.fl_end = ~(u64)0; | |
2857 | else | |
2858 | file_lock.fl_end = lockt->lt_offset + lockt->lt_length - 1; | |
2859 | ||
2860 | nfs4_transform_lock_offset(&file_lock); | |
2861 | ||
2862 | /* posix_test_lock uses the struct file _only_ to resolve the inode. | |
2863 | * since LOCKT doesn't require an OPEN, and therefore a struct | |
2864 | * file may not exist, pass posix_test_lock a struct file with | |
2865 | * only the dentry:inode set. | |
2866 | */ | |
2867 | memset(&file, 0, sizeof (struct file)); | |
2868 | file.f_dentry = current_fh->fh_dentry; | |
2869 | ||
2870 | status = nfs_ok; | |
8dc7c311 | 2871 | if (posix_test_lock(&file, &file_lock, &conflock)) { |
1da177e4 | 2872 | status = nfserr_denied; |
8dc7c311 | 2873 | nfs4_set_lock_denied(&conflock, &lockt->lt_denied); |
1da177e4 LT |
2874 | } |
2875 | out: | |
2876 | nfs4_unlock_state(); | |
2877 | return status; | |
2878 | } | |
2879 | ||
2880 | int | |
f2327d9a | 2881 | nfsd4_locku(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_locku *locku, struct nfs4_stateowner **replay_owner) |
1da177e4 LT |
2882 | { |
2883 | struct nfs4_stateid *stp; | |
2884 | struct file *filp = NULL; | |
2885 | struct file_lock file_lock; | |
2886 | int status; | |
2887 | ||
2888 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", | |
2889 | (long long) locku->lu_offset, | |
2890 | (long long) locku->lu_length); | |
2891 | ||
2892 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
2893 | return nfserr_inval; | |
2894 | ||
2895 | nfs4_lock_state(); | |
2896 | ||
2897 | if ((status = nfs4_preprocess_seqid_op(current_fh, | |
2898 | locku->lu_seqid, | |
2899 | &locku->lu_stateid, | |
2900 | CHECK_FH | LOCK_STATE, | |
2901 | &locku->lu_stateowner, &stp, NULL))) | |
2902 | goto out; | |
2903 | ||
2904 | filp = stp->st_vfs_file; | |
2905 | BUG_ON(!filp); | |
2906 | locks_init_lock(&file_lock); | |
2907 | file_lock.fl_type = F_UNLCK; | |
2908 | file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; | |
2909 | file_lock.fl_pid = current->tgid; | |
2910 | file_lock.fl_file = filp; | |
2911 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 2912 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
2913 | file_lock.fl_start = locku->lu_offset; |
2914 | ||
2915 | if ((locku->lu_length == ~(u64)0) || LOFF_OVERFLOW(locku->lu_offset, locku->lu_length)) | |
2916 | file_lock.fl_end = ~(u64)0; | |
2917 | else | |
2918 | file_lock.fl_end = locku->lu_offset + locku->lu_length - 1; | |
2919 | nfs4_transform_lock_offset(&file_lock); | |
2920 | ||
2921 | /* | |
2922 | * Try to unlock the file in the VFS. | |
2923 | */ | |
2924 | status = posix_lock_file(filp, &file_lock); | |
1da177e4 | 2925 | if (status) { |
849823c5 | 2926 | dprintk("NFSD: nfs4_locku: posix_lock_file failed!\n"); |
1da177e4 LT |
2927 | goto out_nfserr; |
2928 | } | |
2929 | /* | |
2930 | * OK, unlock succeeded; the only thing left to do is update the stateid. | |
2931 | */ | |
2932 | update_stateid(&stp->st_stateid); | |
2933 | memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2934 | ||
2935 | out: | |
f2327d9a | 2936 | if (locku->lu_stateowner) { |
1da177e4 | 2937 | nfs4_get_stateowner(locku->lu_stateowner); |
f2327d9a NB |
2938 | *replay_owner = locku->lu_stateowner; |
2939 | } | |
1da177e4 LT |
2940 | nfs4_unlock_state(); |
2941 | return status; | |
2942 | ||
2943 | out_nfserr: | |
2944 | status = nfserrno(status); | |
2945 | goto out; | |
2946 | } | |
2947 | ||
2948 | /* | |
2949 | * returns | |
2950 | * 1: locks held by lockowner | |
2951 | * 0: no locks held by lockowner | |
2952 | */ | |
2953 | static int | |
2954 | check_for_locks(struct file *filp, struct nfs4_stateowner *lowner) | |
2955 | { | |
2956 | struct file_lock **flpp; | |
2957 | struct inode *inode = filp->f_dentry->d_inode; | |
2958 | int status = 0; | |
2959 | ||
2960 | lock_kernel(); | |
2961 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { | |
796dadfd | 2962 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
2963 | status = 1; |
2964 | goto out; | |
796dadfd | 2965 | } |
1da177e4 LT |
2966 | } |
2967 | out: | |
2968 | unlock_kernel(); | |
2969 | return status; | |
2970 | } | |
2971 | ||
2972 | int | |
2973 | nfsd4_release_lockowner(struct svc_rqst *rqstp, struct nfsd4_release_lockowner *rlockowner) | |
2974 | { | |
2975 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe N |
2976 | struct nfs4_stateowner *sop; |
2977 | struct nfs4_stateid *stp; | |
1da177e4 | 2978 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe N |
2979 | struct list_head matches; |
2980 | int i; | |
1da177e4 LT |
2981 | int status; |
2982 | ||
2983 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
2984 | clid->cl_boot, clid->cl_id); | |
2985 | ||
2986 | /* XXX check for lease expiration */ | |
2987 | ||
2988 | status = nfserr_stale_clientid; | |
849823c5 | 2989 | if (STALE_CLIENTID(clid)) |
1da177e4 | 2990 | return status; |
1da177e4 LT |
2991 | |
2992 | nfs4_lock_state(); | |
2993 | ||
3e9e3dbe N |
2994 | status = nfserr_locks_held; |
2995 | /* XXX: we're doing a linear search through all the lockowners. | |
2996 | * Yipes! For now we'll just hope clients aren't really using | |
2997 | * release_lockowner much, but eventually we have to fix these | |
2998 | * data structures. */ | |
2999 | INIT_LIST_HEAD(&matches); | |
3000 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
3001 | list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { | |
3002 | if (!cmp_owner_str(sop, owner, clid)) | |
3003 | continue; | |
3004 | list_for_each_entry(stp, &sop->so_stateids, | |
3005 | st_perstateowner) { | |
3006 | if (check_for_locks(stp->st_vfs_file, sop)) | |
3007 | goto out; | |
3008 | /* Note: so_perclient unused for lockowners, | |
3009 | * so it's OK to fool with here. */ | |
3010 | list_add(&sop->so_perclient, &matches); | |
3011 | } | |
1da177e4 | 3012 | } |
3e9e3dbe N |
3013 | } |
3014 | /* Clients probably won't expect us to return with some (but not all) | |
3015 | * of the lockowner state released; so don't release any until all | |
3016 | * have been checked. */ | |
3017 | status = nfs_ok; | |
0fa822e4 N |
3018 | while (!list_empty(&matches)) { |
3019 | sop = list_entry(matches.next, struct nfs4_stateowner, | |
3020 | so_perclient); | |
3021 | /* unhash_stateowner deletes so_perclient only | |
3022 | * for openowners. */ | |
3023 | list_del(&sop->so_perclient); | |
3e9e3dbe | 3024 | release_stateowner(sop); |
1da177e4 LT |
3025 | } |
3026 | out: | |
3027 | nfs4_unlock_state(); | |
3028 | return status; | |
3029 | } | |
3030 | ||
3031 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 3032 | alloc_reclaim(void) |
1da177e4 | 3033 | { |
a55370a3 | 3034 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
3035 | } |
3036 | ||
c7b9a459 N |
3037 | int |
3038 | nfs4_has_reclaimed_state(const char *name) | |
3039 | { | |
3040 | unsigned int strhashval = clientstr_hashval(name); | |
3041 | struct nfs4_client *clp; | |
3042 | ||
3043 | clp = find_confirmed_client_by_str(name, strhashval); | |
3044 | return clp ? 1 : 0; | |
3045 | } | |
3046 | ||
1da177e4 LT |
3047 | /* |
3048 | * failure => all reset bets are off, nfserr_no_grace... | |
3049 | */ | |
190e4fbf N |
3050 | int |
3051 | nfs4_client_to_reclaim(const char *name) | |
1da177e4 LT |
3052 | { |
3053 | unsigned int strhashval; | |
3054 | struct nfs4_client_reclaim *crp = NULL; | |
3055 | ||
a55370a3 N |
3056 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
3057 | crp = alloc_reclaim(); | |
1da177e4 LT |
3058 | if (!crp) |
3059 | return 0; | |
a55370a3 | 3060 | strhashval = clientstr_hashval(name); |
1da177e4 LT |
3061 | INIT_LIST_HEAD(&crp->cr_strhash); |
3062 | list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); | |
a55370a3 | 3063 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
1da177e4 LT |
3064 | reclaim_str_hashtbl_size++; |
3065 | return 1; | |
3066 | } | |
3067 | ||
3068 | static void | |
3069 | nfs4_release_reclaim(void) | |
3070 | { | |
3071 | struct nfs4_client_reclaim *crp = NULL; | |
3072 | int i; | |
3073 | ||
1da177e4 LT |
3074 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
3075 | while (!list_empty(&reclaim_str_hashtbl[i])) { | |
3076 | crp = list_entry(reclaim_str_hashtbl[i].next, | |
3077 | struct nfs4_client_reclaim, cr_strhash); | |
3078 | list_del(&crp->cr_strhash); | |
1da177e4 LT |
3079 | kfree(crp); |
3080 | reclaim_str_hashtbl_size--; | |
3081 | } | |
3082 | } | |
3083 | BUG_ON(reclaim_str_hashtbl_size); | |
3084 | } | |
3085 | ||
3086 | /* | |
3087 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
fd39ca9a | 3088 | static struct nfs4_client_reclaim * |
1da177e4 LT |
3089 | nfs4_find_reclaim_client(clientid_t *clid) |
3090 | { | |
3091 | unsigned int strhashval; | |
3092 | struct nfs4_client *clp; | |
3093 | struct nfs4_client_reclaim *crp = NULL; | |
3094 | ||
3095 | ||
3096 | /* find clientid in conf_id_hashtbl */ | |
3097 | clp = find_confirmed_client(clid); | |
3098 | if (clp == NULL) | |
3099 | return NULL; | |
3100 | ||
a55370a3 N |
3101 | dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", |
3102 | clp->cl_name.len, clp->cl_name.data, | |
3103 | clp->cl_recdir); | |
1da177e4 LT |
3104 | |
3105 | /* find clp->cl_name in reclaim_str_hashtbl */ | |
a55370a3 | 3106 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 | 3107 | list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { |
a55370a3 | 3108 | if (same_name(crp->cr_recdir, clp->cl_recdir)) { |
1da177e4 LT |
3109 | return crp; |
3110 | } | |
3111 | } | |
3112 | return NULL; | |
3113 | } | |
3114 | ||
3115 | /* | |
3116 | * Called from OPEN. Look for clientid in reclaim list. | |
3117 | */ | |
3118 | int | |
3119 | nfs4_check_open_reclaim(clientid_t *clid) | |
3120 | { | |
dfc83565 | 3121 | return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; |
1da177e4 LT |
3122 | } |
3123 | ||
ac4d8ff2 | 3124 | /* initialization to perform at module load time: */ |
1da177e4 | 3125 | |
ac4d8ff2 N |
3126 | void |
3127 | nfs4_state_init(void) | |
1da177e4 LT |
3128 | { |
3129 | int i; | |
1da177e4 | 3130 | |
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; | |
ac4d8ff2 N |
3159 | } |
3160 | ||
190e4fbf N |
3161 | static void |
3162 | nfsd4_load_reboot_recovery_data(void) | |
3163 | { | |
3164 | int status; | |
3165 | ||
0964a3d3 N |
3166 | nfs4_lock_state(); |
3167 | nfsd4_init_recdir(user_recovery_dirname); | |
190e4fbf | 3168 | status = nfsd4_recdir_load(); |
0964a3d3 | 3169 | nfs4_unlock_state(); |
190e4fbf N |
3170 | if (status) |
3171 | printk("NFSD: Failure reading reboot recovery data\n"); | |
3172 | } | |
3173 | ||
ac4d8ff2 N |
3174 | /* initialization to perform when the nfsd service is started: */ |
3175 | ||
3176 | static void | |
3177 | __nfs4_state_start(void) | |
3178 | { | |
3179 | time_t grace_time; | |
3180 | ||
1da177e4 | 3181 | boot_time = get_seconds(); |
d99a05ad N |
3182 | grace_time = max(user_lease_time, lease_time); |
3183 | lease_time = user_lease_time; | |
a76b4319 | 3184 | in_grace = 1; |
d99a05ad | 3185 | printk("NFSD: starting %ld-second grace period\n", grace_time); |
58da282b | 3186 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
a76b4319 | 3187 | queue_delayed_work(laundry_wq, &laundromat_work, grace_time*HZ); |
1da177e4 LT |
3188 | } |
3189 | ||
3190 | int | |
76a3550e | 3191 | nfs4_state_start(void) |
1da177e4 LT |
3192 | { |
3193 | int status; | |
3194 | ||
3195 | if (nfs4_init) | |
3196 | return 0; | |
3197 | status = nfsd4_init_slabs(); | |
3198 | if (status) | |
3199 | return status; | |
190e4fbf | 3200 | nfsd4_load_reboot_recovery_data(); |
76a3550e | 3201 | __nfs4_state_start(); |
1da177e4 LT |
3202 | nfs4_init = 1; |
3203 | return 0; | |
3204 | } | |
3205 | ||
3206 | int | |
3207 | nfs4_in_grace(void) | |
3208 | { | |
a76b4319 | 3209 | return in_grace; |
1da177e4 LT |
3210 | } |
3211 | ||
3212 | time_t | |
3213 | nfs4_lease_time(void) | |
3214 | { | |
3215 | return lease_time; | |
3216 | } | |
3217 | ||
3218 | static void | |
3219 | __nfs4_state_shutdown(void) | |
3220 | { | |
3221 | int i; | |
3222 | struct nfs4_client *clp = NULL; | |
3223 | struct nfs4_delegation *dp = NULL; | |
1da177e4 LT |
3224 | struct list_head *pos, *next, reaplist; |
3225 | ||
1da177e4 LT |
3226 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
3227 | while (!list_empty(&conf_id_hashtbl[i])) { | |
3228 | clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
3229 | expire_client(clp); | |
3230 | } | |
3231 | while (!list_empty(&unconf_str_hashtbl[i])) { | |
3232 | clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); | |
3233 | expire_client(clp); | |
3234 | } | |
3235 | } | |
3236 | INIT_LIST_HEAD(&reaplist); | |
3237 | spin_lock(&recall_lock); | |
3238 | list_for_each_safe(pos, next, &del_recall_lru) { | |
3239 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3240 | list_move(&dp->dl_recall_lru, &reaplist); | |
3241 | } | |
3242 | spin_unlock(&recall_lock); | |
3243 | list_for_each_safe(pos, next, &reaplist) { | |
3244 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3245 | list_del_init(&dp->dl_recall_lru); | |
3246 | unhash_delegation(dp); | |
3247 | } | |
3248 | ||
1da177e4 | 3249 | cancel_delayed_work(&laundromat_work); |
190e4fbf | 3250 | nfsd4_shutdown_recdir(); |
1da177e4 | 3251 | nfs4_init = 0; |
1da177e4 LT |
3252 | } |
3253 | ||
3254 | void | |
3255 | nfs4_state_shutdown(void) | |
3256 | { | |
5e8d5c29 N |
3257 | cancel_rearming_delayed_workqueue(laundry_wq, &laundromat_work); |
3258 | destroy_workqueue(laundry_wq); | |
1da177e4 LT |
3259 | nfs4_lock_state(); |
3260 | nfs4_release_reclaim(); | |
3261 | __nfs4_state_shutdown(); | |
3262 | nfsd4_free_slabs(); | |
3263 | nfs4_unlock_state(); | |
3264 | } | |
3265 | ||
0964a3d3 N |
3266 | static void |
3267 | nfs4_set_recdir(char *recdir) | |
3268 | { | |
3269 | nfs4_lock_state(); | |
3270 | strcpy(user_recovery_dirname, recdir); | |
3271 | nfs4_unlock_state(); | |
3272 | } | |
3273 | ||
3274 | /* | |
3275 | * Change the NFSv4 recovery directory to recdir. | |
3276 | */ | |
3277 | int | |
3278 | nfs4_reset_recoverydir(char *recdir) | |
3279 | { | |
3280 | int status; | |
3281 | struct nameidata nd; | |
3282 | ||
3283 | status = path_lookup(recdir, LOOKUP_FOLLOW, &nd); | |
3284 | if (status) | |
3285 | return status; | |
3286 | status = -ENOTDIR; | |
3287 | if (S_ISDIR(nd.dentry->d_inode->i_mode)) { | |
3288 | nfs4_set_recdir(recdir); | |
3289 | status = 0; | |
3290 | } | |
3291 | path_release(&nd); | |
3292 | return status; | |
3293 | } | |
3294 | ||
1da177e4 LT |
3295 | /* |
3296 | * Called when leasetime is changed. | |
3297 | * | |
d99a05ad N |
3298 | * The only way the protocol gives us to handle on-the-fly lease changes is to |
3299 | * simulate a reboot. Instead of doing that, we just wait till the next time | |
3300 | * we start to register any changes in lease time. If the administrator | |
3301 | * really wants to change the lease time *now*, they can go ahead and bring | |
3302 | * nfsd down and then back up again after changing the lease time. | |
1da177e4 LT |
3303 | */ |
3304 | void | |
3305 | nfs4_reset_lease(time_t leasetime) | |
3306 | { | |
d99a05ad N |
3307 | lock_kernel(); |
3308 | user_lease_time = leasetime; | |
3309 | unlock_kernel(); | |
1da177e4 | 3310 | } |