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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> |
fd85b817 | 53 | #include <linux/lockd/bind.h> |
1da177e4 LT |
54 | |
55 | #define NFSDDBG_FACILITY NFSDDBG_PROC | |
56 | ||
57 | /* Globals */ | |
58 | static time_t lease_time = 90; /* default lease time */ | |
d99a05ad | 59 | static time_t user_lease_time = 90; |
fd39ca9a | 60 | static time_t boot_time; |
a76b4319 | 61 | static int in_grace = 1; |
1da177e4 LT |
62 | static u32 current_clientid = 1; |
63 | static u32 current_ownerid = 1; | |
64 | static u32 current_fileid = 1; | |
65 | static u32 current_delegid = 1; | |
66 | static u32 nfs4_init; | |
fd39ca9a N |
67 | static stateid_t zerostateid; /* bits all 0 */ |
68 | static stateid_t onestateid; /* bits all 1 */ | |
69 | ||
70 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t))) | |
71 | #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t))) | |
1da177e4 | 72 | |
1da177e4 | 73 | /* forward declarations */ |
fd39ca9a | 74 | static struct nfs4_stateid * find_stateid(stateid_t *stid, int flags); |
1da177e4 LT |
75 | static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid); |
76 | static void release_stateid_lockowners(struct nfs4_stateid *open_stp); | |
0964a3d3 N |
77 | static char user_recovery_dirname[PATH_MAX] = "/var/lib/nfs/v4recovery"; |
78 | static void nfs4_set_recdir(char *recdir); | |
1da177e4 LT |
79 | |
80 | /* Locking: | |
81 | * | |
353ab6e9 | 82 | * client_mutex: |
1da177e4 LT |
83 | * protects clientid_hashtbl[], clientstr_hashtbl[], |
84 | * unconfstr_hashtbl[], uncofid_hashtbl[]. | |
85 | */ | |
353ab6e9 | 86 | static DEFINE_MUTEX(client_mutex); |
1da177e4 | 87 | |
e18b890b CL |
88 | static struct kmem_cache *stateowner_slab = NULL; |
89 | static struct kmem_cache *file_slab = NULL; | |
90 | static struct kmem_cache *stateid_slab = NULL; | |
91 | static struct kmem_cache *deleg_slab = NULL; | |
e60d4398 | 92 | |
1da177e4 LT |
93 | void |
94 | nfs4_lock_state(void) | |
95 | { | |
353ab6e9 | 96 | mutex_lock(&client_mutex); |
1da177e4 LT |
97 | } |
98 | ||
99 | void | |
100 | nfs4_unlock_state(void) | |
101 | { | |
353ab6e9 | 102 | mutex_unlock(&client_mutex); |
1da177e4 LT |
103 | } |
104 | ||
105 | static inline u32 | |
106 | opaque_hashval(const void *ptr, int nbytes) | |
107 | { | |
108 | unsigned char *cptr = (unsigned char *) ptr; | |
109 | ||
110 | u32 x = 0; | |
111 | while (nbytes--) { | |
112 | x *= 37; | |
113 | x += *cptr++; | |
114 | } | |
115 | return x; | |
116 | } | |
117 | ||
118 | /* forward declarations */ | |
119 | static void release_stateowner(struct nfs4_stateowner *sop); | |
120 | static void release_stateid(struct nfs4_stateid *stp, int flags); | |
1da177e4 LT |
121 | |
122 | /* | |
123 | * Delegation state | |
124 | */ | |
125 | ||
126 | /* recall_lock protects the del_recall_lru */ | |
34af946a | 127 | static DEFINE_SPINLOCK(recall_lock); |
1da177e4 LT |
128 | static struct list_head del_recall_lru; |
129 | ||
13cd2184 N |
130 | static void |
131 | free_nfs4_file(struct kref *kref) | |
132 | { | |
133 | struct nfs4_file *fp = container_of(kref, struct nfs4_file, fi_ref); | |
134 | list_del(&fp->fi_hash); | |
135 | iput(fp->fi_inode); | |
136 | kmem_cache_free(file_slab, fp); | |
137 | } | |
138 | ||
139 | static inline void | |
140 | put_nfs4_file(struct nfs4_file *fi) | |
141 | { | |
142 | kref_put(&fi->fi_ref, free_nfs4_file); | |
143 | } | |
144 | ||
145 | static inline void | |
146 | get_nfs4_file(struct nfs4_file *fi) | |
147 | { | |
148 | kref_get(&fi->fi_ref); | |
149 | } | |
150 | ||
ef0f3390 N |
151 | static int num_delegations; |
152 | ||
153 | /* | |
154 | * Open owner state (share locks) | |
155 | */ | |
156 | ||
157 | /* hash tables for nfs4_stateowner */ | |
158 | #define OWNER_HASH_BITS 8 | |
159 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
160 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
161 | ||
162 | #define ownerid_hashval(id) \ | |
163 | ((id) & OWNER_HASH_MASK) | |
164 | #define ownerstr_hashval(clientid, ownername) \ | |
165 | (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK) | |
166 | ||
167 | static struct list_head ownerid_hashtbl[OWNER_HASH_SIZE]; | |
168 | static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; | |
169 | ||
170 | /* hash table for nfs4_file */ | |
171 | #define FILE_HASH_BITS 8 | |
172 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
173 | #define FILE_HASH_MASK (FILE_HASH_SIZE - 1) | |
174 | /* hash table for (open)nfs4_stateid */ | |
175 | #define STATEID_HASH_BITS 10 | |
176 | #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS) | |
177 | #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1) | |
178 | ||
179 | #define file_hashval(x) \ | |
180 | hash_ptr(x, FILE_HASH_BITS) | |
181 | #define stateid_hashval(owner_id, file_id) \ | |
182 | (((owner_id) + (file_id)) & STATEID_HASH_MASK) | |
183 | ||
184 | static struct list_head file_hashtbl[FILE_HASH_SIZE]; | |
185 | static struct list_head stateid_hashtbl[STATEID_HASH_SIZE]; | |
186 | ||
1da177e4 LT |
187 | static struct nfs4_delegation * |
188 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type) | |
189 | { | |
190 | struct nfs4_delegation *dp; | |
191 | struct nfs4_file *fp = stp->st_file; | |
192 | struct nfs4_callback *cb = &stp->st_stateowner->so_client->cl_callback; | |
193 | ||
194 | dprintk("NFSD alloc_init_deleg\n"); | |
ef0f3390 N |
195 | if (num_delegations > STATEID_HASH_SIZE * 4) |
196 | return NULL; | |
5b2d21c1 N |
197 | dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); |
198 | if (dp == NULL) | |
1da177e4 | 199 | return dp; |
ef0f3390 | 200 | num_delegations++; |
ea1da636 N |
201 | INIT_LIST_HEAD(&dp->dl_perfile); |
202 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 LT |
203 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
204 | dp->dl_client = clp; | |
13cd2184 | 205 | get_nfs4_file(fp); |
1da177e4 LT |
206 | dp->dl_file = fp; |
207 | dp->dl_flock = NULL; | |
208 | get_file(stp->st_vfs_file); | |
209 | dp->dl_vfs_file = stp->st_vfs_file; | |
210 | dp->dl_type = type; | |
211 | dp->dl_recall.cbr_dp = NULL; | |
212 | dp->dl_recall.cbr_ident = cb->cb_ident; | |
213 | dp->dl_recall.cbr_trunc = 0; | |
214 | dp->dl_stateid.si_boot = boot_time; | |
215 | dp->dl_stateid.si_stateownerid = current_delegid++; | |
216 | dp->dl_stateid.si_fileid = 0; | |
217 | dp->dl_stateid.si_generation = 0; | |
218 | dp->dl_fhlen = current_fh->fh_handle.fh_size; | |
219 | memcpy(dp->dl_fhval, ¤t_fh->fh_handle.fh_base, | |
220 | current_fh->fh_handle.fh_size); | |
221 | dp->dl_time = 0; | |
222 | atomic_set(&dp->dl_count, 1); | |
ea1da636 N |
223 | list_add(&dp->dl_perfile, &fp->fi_delegations); |
224 | list_add(&dp->dl_perclnt, &clp->cl_delegations); | |
1da177e4 LT |
225 | return dp; |
226 | } | |
227 | ||
228 | void | |
229 | nfs4_put_delegation(struct nfs4_delegation *dp) | |
230 | { | |
231 | if (atomic_dec_and_test(&dp->dl_count)) { | |
232 | dprintk("NFSD: freeing dp %p\n",dp); | |
13cd2184 | 233 | put_nfs4_file(dp->dl_file); |
5b2d21c1 | 234 | kmem_cache_free(deleg_slab, dp); |
ef0f3390 | 235 | num_delegations--; |
1da177e4 LT |
236 | } |
237 | } | |
238 | ||
239 | /* Remove the associated file_lock first, then remove the delegation. | |
240 | * lease_modify() is called to remove the FS_LEASE file_lock from | |
241 | * the i_flock list, eventually calling nfsd's lock_manager | |
242 | * fl_release_callback. | |
243 | */ | |
244 | static void | |
245 | nfs4_close_delegation(struct nfs4_delegation *dp) | |
246 | { | |
247 | struct file *filp = dp->dl_vfs_file; | |
248 | ||
249 | dprintk("NFSD: close_delegation dp %p\n",dp); | |
250 | dp->dl_vfs_file = NULL; | |
251 | /* The following nfsd_close may not actually close the file, | |
252 | * but we want to remove the lease in any case. */ | |
c907132d N |
253 | if (dp->dl_flock) |
254 | setlease(filp, F_UNLCK, &dp->dl_flock); | |
1da177e4 | 255 | nfsd_close(filp); |
1da177e4 LT |
256 | } |
257 | ||
258 | /* Called under the state lock. */ | |
259 | static void | |
260 | unhash_delegation(struct nfs4_delegation *dp) | |
261 | { | |
ea1da636 N |
262 | list_del_init(&dp->dl_perfile); |
263 | list_del_init(&dp->dl_perclnt); | |
1da177e4 LT |
264 | spin_lock(&recall_lock); |
265 | list_del_init(&dp->dl_recall_lru); | |
266 | spin_unlock(&recall_lock); | |
267 | nfs4_close_delegation(dp); | |
268 | nfs4_put_delegation(dp); | |
269 | } | |
270 | ||
271 | /* | |
272 | * SETCLIENTID state | |
273 | */ | |
274 | ||
275 | /* Hash tables for nfs4_clientid state */ | |
276 | #define CLIENT_HASH_BITS 4 | |
277 | #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) | |
278 | #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) | |
279 | ||
280 | #define clientid_hashval(id) \ | |
281 | ((id) & CLIENT_HASH_MASK) | |
a55370a3 N |
282 | #define clientstr_hashval(name) \ |
283 | (opaque_hashval((name), 8) & CLIENT_HASH_MASK) | |
1da177e4 LT |
284 | /* |
285 | * reclaim_str_hashtbl[] holds known client info from previous reset/reboot | |
286 | * used in reboot/reset lease grace period processing | |
287 | * | |
288 | * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed | |
289 | * setclientid_confirmed info. | |
290 | * | |
291 | * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed | |
292 | * setclientid info. | |
293 | * | |
294 | * client_lru holds client queue ordered by nfs4_client.cl_time | |
295 | * for lease renewal. | |
296 | * | |
297 | * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time | |
298 | * for last close replay. | |
299 | */ | |
300 | static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; | |
301 | static int reclaim_str_hashtbl_size = 0; | |
302 | static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; | |
303 | static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; | |
304 | static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; | |
305 | static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; | |
306 | static struct list_head client_lru; | |
307 | static struct list_head close_lru; | |
308 | ||
309 | static inline void | |
310 | renew_client(struct nfs4_client *clp) | |
311 | { | |
312 | /* | |
313 | * Move client to the end to the LRU list. | |
314 | */ | |
315 | dprintk("renewing client (clientid %08x/%08x)\n", | |
316 | clp->cl_clientid.cl_boot, | |
317 | clp->cl_clientid.cl_id); | |
318 | list_move_tail(&clp->cl_lru, &client_lru); | |
319 | clp->cl_time = get_seconds(); | |
320 | } | |
321 | ||
322 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ | |
323 | static int | |
324 | STALE_CLIENTID(clientid_t *clid) | |
325 | { | |
326 | if (clid->cl_boot == boot_time) | |
327 | return 0; | |
328 | dprintk("NFSD stale clientid (%08x/%08x)\n", | |
329 | clid->cl_boot, clid->cl_id); | |
330 | return 1; | |
331 | } | |
332 | ||
333 | /* | |
334 | * XXX Should we use a slab cache ? | |
335 | * This type of memory management is somewhat inefficient, but we use it | |
336 | * anyway since SETCLIENTID is not a common operation. | |
337 | */ | |
338 | static inline struct nfs4_client * | |
339 | alloc_client(struct xdr_netobj name) | |
340 | { | |
341 | struct nfs4_client *clp; | |
342 | ||
f8314dc6 | 343 | if ((clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL))!= NULL) { |
1da177e4 LT |
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 | */ | |
b37ad28b | 714 | __be32 |
b591480b BF |
715 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
716 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 717 | { |
27459f09 | 718 | struct sockaddr_in *sin = svc_addr_in(rqstp); |
1da177e4 LT |
719 | struct xdr_netobj clname = { |
720 | .len = setclid->se_namelen, | |
721 | .data = setclid->se_name, | |
722 | }; | |
723 | nfs4_verifier clverifier = setclid->se_verf; | |
724 | unsigned int strhashval; | |
28ce6054 | 725 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 726 | __be32 status; |
a55370a3 | 727 | char dname[HEXDIR_LEN]; |
1da177e4 | 728 | |
1da177e4 | 729 | if (!check_name(clname)) |
73aea4ec | 730 | return nfserr_inval; |
1da177e4 | 731 | |
a55370a3 N |
732 | status = nfs4_make_rec_clidname(dname, &clname); |
733 | if (status) | |
73aea4ec | 734 | return status; |
a55370a3 | 735 | |
1da177e4 LT |
736 | /* |
737 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
738 | * We get here on a DRC miss. | |
739 | */ | |
740 | ||
a55370a3 | 741 | strhashval = clientstr_hashval(dname); |
1da177e4 | 742 | |
1da177e4 | 743 | nfs4_lock_state(); |
28ce6054 N |
744 | conf = find_confirmed_client_by_str(dname, strhashval); |
745 | if (conf) { | |
1da177e4 LT |
746 | /* |
747 | * CASE 0: | |
748 | * clname match, confirmed, different principal | |
749 | * or different ip_address | |
750 | */ | |
751 | status = nfserr_clid_inuse; | |
28ce6054 | 752 | if (!cmp_creds(&conf->cl_cred, &rqstp->rq_cred) |
27459f09 | 753 | || conf->cl_addr != sin->sin_addr.s_addr) { |
21315edd BF |
754 | dprintk("NFSD: setclientid: string in use by client" |
755 | "at %u.%u.%u.%u\n", NIPQUAD(conf->cl_addr)); | |
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); | |
27459f09 | 772 | new->cl_addr = sin->sin_addr.s_addr; |
1da177e4 LT |
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); | |
27459f09 | 804 | new->cl_addr = sin->sin_addr.s_addr; |
1da177e4 LT |
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); | |
27459f09 | 823 | new->cl_addr = sin->sin_addr.s_addr; |
1da177e4 LT |
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); | |
27459f09 | 850 | new->cl_addr = sin->sin_addr.s_addr; |
1da177e4 LT |
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 | */ | |
b37ad28b | 879 | __be32 |
b591480b BF |
880 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
881 | struct nfsd4_compound_state *cstate, | |
882 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 883 | { |
27459f09 | 884 | struct sockaddr_in *sin = svc_addr_in(rqstp); |
21ab45a4 | 885 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
886 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
887 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 888 | __be32 status; |
1da177e4 LT |
889 | |
890 | if (STALE_CLIENTID(clid)) | |
891 | return nfserr_stale_clientid; | |
892 | /* | |
893 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
894 | * We get here on a DRC miss. | |
895 | */ | |
896 | ||
897 | nfs4_lock_state(); | |
21ab45a4 N |
898 | |
899 | conf = find_confirmed_client(clid); | |
900 | unconf = find_unconfirmed_client(clid); | |
901 | ||
902 | status = nfserr_clid_inuse; | |
27459f09 | 903 | if (conf && conf->cl_addr != sin->sin_addr.s_addr) |
21ab45a4 | 904 | goto out; |
27459f09 | 905 | if (unconf && unconf->cl_addr != sin->sin_addr.s_addr) |
21ab45a4 N |
906 | goto out; |
907 | ||
1da177e4 LT |
908 | if ((conf && unconf) && |
909 | (cmp_verf(&unconf->cl_confirm, &confirm)) && | |
910 | (cmp_verf(&conf->cl_verifier, &unconf->cl_verifier)) && | |
a55370a3 | 911 | (same_name(conf->cl_recdir,unconf->cl_recdir)) && |
1da177e4 | 912 | (!cmp_verf(&conf->cl_confirm, &unconf->cl_confirm))) { |
7c79f737 N |
913 | /* CASE 1: |
914 | * unconf record that matches input clientid and input confirm. | |
915 | * conf record that matches input clientid. | |
916 | * conf and unconf records match names, verifiers | |
917 | */ | |
1da177e4 LT |
918 | if (!cmp_creds(&conf->cl_cred, &unconf->cl_cred)) |
919 | status = nfserr_clid_inuse; | |
920 | else { | |
1a69c179 N |
921 | /* XXX: We just turn off callbacks until we can handle |
922 | * change request correctly. */ | |
cb36d634 | 923 | atomic_set(&conf->cl_callback.cb_set, 0); |
21ab45a4 | 924 | gen_confirm(conf); |
46309029 | 925 | nfsd4_remove_clid_dir(unconf); |
1a69c179 | 926 | expire_client(unconf); |
1da177e4 | 927 | status = nfs_ok; |
1a69c179 | 928 | |
1da177e4 | 929 | } |
7c79f737 | 930 | } else if ((conf && !unconf) || |
1da177e4 LT |
931 | ((conf && unconf) && |
932 | (!cmp_verf(&conf->cl_verifier, &unconf->cl_verifier) || | |
a55370a3 | 933 | !same_name(conf->cl_recdir, unconf->cl_recdir)))) { |
7c79f737 N |
934 | /* CASE 2: |
935 | * conf record that matches input clientid. | |
936 | * if unconf record matches input clientid, then | |
937 | * unconf->cl_name or unconf->cl_verifier don't match the | |
938 | * conf record. | |
939 | */ | |
21ab45a4 | 940 | if (!cmp_creds(&conf->cl_cred,&rqstp->rq_cred)) |
1da177e4 | 941 | status = nfserr_clid_inuse; |
21ab45a4 | 942 | else |
1da177e4 | 943 | status = nfs_ok; |
7c79f737 N |
944 | } else if (!conf && unconf |
945 | && cmp_verf(&unconf->cl_confirm, &confirm)) { | |
946 | /* CASE 3: | |
947 | * conf record not found. | |
948 | * unconf record found. | |
949 | * unconf->cl_confirm matches input confirm | |
950 | */ | |
1da177e4 LT |
951 | if (!cmp_creds(&unconf->cl_cred, &rqstp->rq_cred)) { |
952 | status = nfserr_clid_inuse; | |
953 | } else { | |
1a69c179 N |
954 | unsigned int hash = |
955 | clientstr_hashval(unconf->cl_recdir); | |
956 | conf = find_confirmed_client_by_str(unconf->cl_recdir, | |
957 | hash); | |
958 | if (conf) { | |
c7b9a459 | 959 | nfsd4_remove_clid_dir(conf); |
1a69c179 N |
960 | expire_client(conf); |
961 | } | |
1da177e4 | 962 | move_to_confirmed(unconf); |
21ab45a4 | 963 | conf = unconf; |
1a69c179 | 964 | status = nfs_ok; |
1da177e4 | 965 | } |
7c79f737 N |
966 | } else if ((!conf || (conf && !cmp_verf(&conf->cl_confirm, &confirm))) |
967 | && (!unconf || (unconf && !cmp_verf(&unconf->cl_confirm, | |
968 | &confirm)))) { | |
969 | /* CASE 4: | |
970 | * conf record not found, or if conf, conf->cl_confirm does not | |
971 | * match input confirm. | |
972 | * unconf record not found, or if unconf, unconf->cl_confirm | |
973 | * does not match input confirm. | |
974 | */ | |
1da177e4 | 975 | status = nfserr_stale_clientid; |
7c79f737 | 976 | } else { |
08e8987c N |
977 | /* check that we have hit one of the cases...*/ |
978 | status = nfserr_clid_inuse; | |
979 | } | |
1da177e4 LT |
980 | out: |
981 | if (!status) | |
21ab45a4 | 982 | nfsd4_probe_callback(conf); |
1da177e4 LT |
983 | nfs4_unlock_state(); |
984 | return status; | |
985 | } | |
986 | ||
1da177e4 LT |
987 | /* OPEN Share state helper functions */ |
988 | static inline struct nfs4_file * | |
989 | alloc_init_file(struct inode *ino) | |
990 | { | |
991 | struct nfs4_file *fp; | |
992 | unsigned int hashval = file_hashval(ino); | |
993 | ||
e60d4398 N |
994 | fp = kmem_cache_alloc(file_slab, GFP_KERNEL); |
995 | if (fp) { | |
13cd2184 | 996 | kref_init(&fp->fi_ref); |
1da177e4 | 997 | INIT_LIST_HEAD(&fp->fi_hash); |
8beefa24 N |
998 | INIT_LIST_HEAD(&fp->fi_stateids); |
999 | INIT_LIST_HEAD(&fp->fi_delegations); | |
1da177e4 LT |
1000 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); |
1001 | fp->fi_inode = igrab(ino); | |
1002 | fp->fi_id = current_fileid++; | |
1da177e4 LT |
1003 | return fp; |
1004 | } | |
1005 | return NULL; | |
1006 | } | |
1007 | ||
e60d4398 | 1008 | static void |
e18b890b | 1009 | nfsd4_free_slab(struct kmem_cache **slab) |
1da177e4 | 1010 | { |
e60d4398 N |
1011 | if (*slab == NULL) |
1012 | return; | |
1a1d92c1 | 1013 | kmem_cache_destroy(*slab); |
e60d4398 | 1014 | *slab = NULL; |
1da177e4 LT |
1015 | } |
1016 | ||
1017 | static void | |
1018 | nfsd4_free_slabs(void) | |
1019 | { | |
e60d4398 N |
1020 | nfsd4_free_slab(&stateowner_slab); |
1021 | nfsd4_free_slab(&file_slab); | |
5ac049ac | 1022 | nfsd4_free_slab(&stateid_slab); |
5b2d21c1 | 1023 | nfsd4_free_slab(&deleg_slab); |
e60d4398 | 1024 | } |
1da177e4 | 1025 | |
e60d4398 N |
1026 | static int |
1027 | nfsd4_init_slabs(void) | |
1028 | { | |
1029 | stateowner_slab = kmem_cache_create("nfsd4_stateowners", | |
1030 | sizeof(struct nfs4_stateowner), 0, 0, NULL, NULL); | |
1031 | if (stateowner_slab == NULL) | |
1032 | goto out_nomem; | |
1033 | file_slab = kmem_cache_create("nfsd4_files", | |
1034 | sizeof(struct nfs4_file), 0, 0, NULL, NULL); | |
1035 | if (file_slab == NULL) | |
1036 | goto out_nomem; | |
5ac049ac N |
1037 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
1038 | sizeof(struct nfs4_stateid), 0, 0, NULL, NULL); | |
1039 | if (stateid_slab == NULL) | |
1040 | goto out_nomem; | |
5b2d21c1 N |
1041 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
1042 | sizeof(struct nfs4_delegation), 0, 0, NULL, NULL); | |
1043 | if (deleg_slab == NULL) | |
1044 | goto out_nomem; | |
e60d4398 N |
1045 | return 0; |
1046 | out_nomem: | |
1047 | nfsd4_free_slabs(); | |
1048 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | |
1049 | return -ENOMEM; | |
1da177e4 LT |
1050 | } |
1051 | ||
1052 | void | |
1053 | nfs4_free_stateowner(struct kref *kref) | |
1054 | { | |
1055 | struct nfs4_stateowner *sop = | |
1056 | container_of(kref, struct nfs4_stateowner, so_ref); | |
1057 | kfree(sop->so_owner.data); | |
1058 | kmem_cache_free(stateowner_slab, sop); | |
1059 | } | |
1060 | ||
1061 | static inline struct nfs4_stateowner * | |
1062 | alloc_stateowner(struct xdr_netobj *owner) | |
1063 | { | |
1064 | struct nfs4_stateowner *sop; | |
1065 | ||
1066 | if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) { | |
1067 | if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) { | |
1068 | memcpy(sop->so_owner.data, owner->data, owner->len); | |
1069 | sop->so_owner.len = owner->len; | |
1070 | kref_init(&sop->so_ref); | |
1071 | return sop; | |
1072 | } | |
1073 | kmem_cache_free(stateowner_slab, sop); | |
1074 | } | |
1075 | return NULL; | |
1076 | } | |
1077 | ||
1078 | static struct nfs4_stateowner * | |
1079 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { | |
1080 | struct nfs4_stateowner *sop; | |
1081 | struct nfs4_replay *rp; | |
1082 | unsigned int idhashval; | |
1083 | ||
1084 | if (!(sop = alloc_stateowner(&open->op_owner))) | |
1085 | return NULL; | |
1086 | idhashval = ownerid_hashval(current_ownerid); | |
1087 | INIT_LIST_HEAD(&sop->so_idhash); | |
1088 | INIT_LIST_HEAD(&sop->so_strhash); | |
1089 | INIT_LIST_HEAD(&sop->so_perclient); | |
ea1da636 N |
1090 | INIT_LIST_HEAD(&sop->so_stateids); |
1091 | INIT_LIST_HEAD(&sop->so_perstateid); /* not used */ | |
1da177e4 LT |
1092 | INIT_LIST_HEAD(&sop->so_close_lru); |
1093 | sop->so_time = 0; | |
1094 | list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]); | |
1095 | list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]); | |
ea1da636 | 1096 | list_add(&sop->so_perclient, &clp->cl_openowners); |
1da177e4 LT |
1097 | sop->so_is_open_owner = 1; |
1098 | sop->so_id = current_ownerid++; | |
1099 | sop->so_client = clp; | |
1100 | sop->so_seqid = open->op_seqid; | |
1101 | sop->so_confirmed = 0; | |
1102 | rp = &sop->so_replay; | |
de1ae286 | 1103 | rp->rp_status = nfserr_serverfault; |
1da177e4 LT |
1104 | rp->rp_buflen = 0; |
1105 | rp->rp_buf = rp->rp_ibuf; | |
1106 | return sop; | |
1107 | } | |
1108 | ||
1109 | static void | |
1110 | release_stateid_lockowners(struct nfs4_stateid *open_stp) | |
1111 | { | |
1112 | struct nfs4_stateowner *lock_sop; | |
1113 | ||
ea1da636 N |
1114 | while (!list_empty(&open_stp->st_lockowners)) { |
1115 | lock_sop = list_entry(open_stp->st_lockowners.next, | |
1116 | struct nfs4_stateowner, so_perstateid); | |
1117 | /* list_del(&open_stp->st_lockowners); */ | |
1da177e4 LT |
1118 | BUG_ON(lock_sop->so_is_open_owner); |
1119 | release_stateowner(lock_sop); | |
1120 | } | |
1121 | } | |
1122 | ||
1123 | static void | |
1124 | unhash_stateowner(struct nfs4_stateowner *sop) | |
1125 | { | |
1126 | struct nfs4_stateid *stp; | |
1127 | ||
1128 | list_del(&sop->so_idhash); | |
1129 | list_del(&sop->so_strhash); | |
6fa305de | 1130 | if (sop->so_is_open_owner) |
1da177e4 | 1131 | list_del(&sop->so_perclient); |
ea1da636 N |
1132 | list_del(&sop->so_perstateid); |
1133 | while (!list_empty(&sop->so_stateids)) { | |
1134 | stp = list_entry(sop->so_stateids.next, | |
1135 | struct nfs4_stateid, st_perstateowner); | |
1da177e4 LT |
1136 | if (sop->so_is_open_owner) |
1137 | release_stateid(stp, OPEN_STATE); | |
1138 | else | |
1139 | release_stateid(stp, LOCK_STATE); | |
1140 | } | |
1141 | } | |
1142 | ||
1143 | static void | |
1144 | release_stateowner(struct nfs4_stateowner *sop) | |
1145 | { | |
1146 | unhash_stateowner(sop); | |
1147 | list_del(&sop->so_close_lru); | |
1148 | nfs4_put_stateowner(sop); | |
1149 | } | |
1150 | ||
1151 | static inline void | |
1152 | init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { | |
1153 | struct nfs4_stateowner *sop = open->op_stateowner; | |
1154 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); | |
1155 | ||
1156 | INIT_LIST_HEAD(&stp->st_hash); | |
ea1da636 N |
1157 | INIT_LIST_HEAD(&stp->st_perstateowner); |
1158 | INIT_LIST_HEAD(&stp->st_lockowners); | |
1da177e4 LT |
1159 | INIT_LIST_HEAD(&stp->st_perfile); |
1160 | list_add(&stp->st_hash, &stateid_hashtbl[hashval]); | |
ea1da636 | 1161 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
8beefa24 | 1162 | list_add(&stp->st_perfile, &fp->fi_stateids); |
1da177e4 | 1163 | stp->st_stateowner = sop; |
13cd2184 | 1164 | get_nfs4_file(fp); |
1da177e4 LT |
1165 | stp->st_file = fp; |
1166 | stp->st_stateid.si_boot = boot_time; | |
1167 | stp->st_stateid.si_stateownerid = sop->so_id; | |
1168 | stp->st_stateid.si_fileid = fp->fi_id; | |
1169 | stp->st_stateid.si_generation = 0; | |
1170 | stp->st_access_bmap = 0; | |
1171 | stp->st_deny_bmap = 0; | |
1172 | __set_bit(open->op_share_access, &stp->st_access_bmap); | |
1173 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); | |
4c4cd222 | 1174 | stp->st_openstp = NULL; |
1da177e4 LT |
1175 | } |
1176 | ||
1177 | static void | |
1178 | release_stateid(struct nfs4_stateid *stp, int flags) | |
1179 | { | |
1180 | struct file *filp = stp->st_vfs_file; | |
1181 | ||
1182 | list_del(&stp->st_hash); | |
1da177e4 | 1183 | list_del(&stp->st_perfile); |
ea1da636 | 1184 | list_del(&stp->st_perstateowner); |
1da177e4 LT |
1185 | if (flags & OPEN_STATE) { |
1186 | release_stateid_lockowners(stp); | |
1187 | stp->st_vfs_file = NULL; | |
1188 | nfsd_close(filp); | |
1da177e4 LT |
1189 | } else if (flags & LOCK_STATE) |
1190 | locks_remove_posix(filp, (fl_owner_t) stp->st_stateowner); | |
13cd2184 | 1191 | put_nfs4_file(stp->st_file); |
5ac049ac | 1192 | kmem_cache_free(stateid_slab, stp); |
1da177e4 LT |
1193 | } |
1194 | ||
fd39ca9a | 1195 | static void |
1da177e4 LT |
1196 | move_to_close_lru(struct nfs4_stateowner *sop) |
1197 | { | |
1198 | dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); | |
1199 | ||
358dd55a | 1200 | list_move_tail(&sop->so_close_lru, &close_lru); |
1da177e4 LT |
1201 | sop->so_time = get_seconds(); |
1202 | } | |
1203 | ||
1da177e4 LT |
1204 | static int |
1205 | cmp_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, clientid_t *clid) { | |
1206 | return ((sop->so_owner.len == owner->len) && | |
1207 | !memcmp(sop->so_owner.data, owner->data, owner->len) && | |
1208 | (sop->so_client->cl_clientid.cl_id == clid->cl_id)); | |
1209 | } | |
1210 | ||
1211 | static struct nfs4_stateowner * | |
1212 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) | |
1213 | { | |
1214 | struct nfs4_stateowner *so = NULL; | |
1215 | ||
1216 | list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { | |
1217 | if (cmp_owner_str(so, &open->op_owner, &open->op_clientid)) | |
1218 | return so; | |
1219 | } | |
1220 | return NULL; | |
1221 | } | |
1222 | ||
1223 | /* search file_hashtbl[] for file */ | |
1224 | static struct nfs4_file * | |
1225 | find_file(struct inode *ino) | |
1226 | { | |
1227 | unsigned int hashval = file_hashval(ino); | |
1228 | struct nfs4_file *fp; | |
1229 | ||
1230 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { | |
13cd2184 N |
1231 | if (fp->fi_inode == ino) { |
1232 | get_nfs4_file(fp); | |
1da177e4 | 1233 | return fp; |
13cd2184 | 1234 | } |
1da177e4 LT |
1235 | } |
1236 | return NULL; | |
1237 | } | |
1238 | ||
ba5a6a19 BF |
1239 | static int access_valid(u32 x) |
1240 | { | |
1241 | return (x > 0 && x < 4); | |
1242 | } | |
1243 | ||
1244 | static int deny_valid(u32 x) | |
1245 | { | |
1246 | return (x >= 0 && x < 5); | |
1247 | } | |
1da177e4 | 1248 | |
fd39ca9a | 1249 | static void |
1da177e4 LT |
1250 | set_access(unsigned int *access, unsigned long bmap) { |
1251 | int i; | |
1252 | ||
1253 | *access = 0; | |
1254 | for (i = 1; i < 4; i++) { | |
1255 | if (test_bit(i, &bmap)) | |
1256 | *access |= i; | |
1257 | } | |
1258 | } | |
1259 | ||
fd39ca9a | 1260 | static void |
1da177e4 LT |
1261 | set_deny(unsigned int *deny, unsigned long bmap) { |
1262 | int i; | |
1263 | ||
1264 | *deny = 0; | |
1265 | for (i = 0; i < 4; i++) { | |
1266 | if (test_bit(i, &bmap)) | |
1267 | *deny |= i ; | |
1268 | } | |
1269 | } | |
1270 | ||
1271 | static int | |
1272 | test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { | |
1273 | unsigned int access, deny; | |
1274 | ||
1275 | set_access(&access, stp->st_access_bmap); | |
1276 | set_deny(&deny, stp->st_deny_bmap); | |
1277 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) | |
1278 | return 0; | |
1279 | return 1; | |
1280 | } | |
1281 | ||
1282 | /* | |
1283 | * Called to check deny when READ with all zero stateid or | |
1284 | * WRITE with all zero or all one stateid | |
1285 | */ | |
b37ad28b | 1286 | static __be32 |
1da177e4 LT |
1287 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
1288 | { | |
1289 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
1290 | struct nfs4_file *fp; | |
1291 | struct nfs4_stateid *stp; | |
b37ad28b | 1292 | __be32 ret; |
1da177e4 LT |
1293 | |
1294 | dprintk("NFSD: nfs4_share_conflict\n"); | |
1295 | ||
1296 | fp = find_file(ino); | |
13cd2184 N |
1297 | if (!fp) |
1298 | return nfs_ok; | |
b700949b | 1299 | ret = nfserr_locked; |
1da177e4 | 1300 | /* Search for conflicting share reservations */ |
13cd2184 N |
1301 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
1302 | if (test_bit(deny_type, &stp->st_deny_bmap) || | |
1303 | test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) | |
1304 | goto out; | |
1da177e4 | 1305 | } |
13cd2184 N |
1306 | ret = nfs_ok; |
1307 | out: | |
1308 | put_nfs4_file(fp); | |
1309 | return ret; | |
1da177e4 LT |
1310 | } |
1311 | ||
1312 | static inline void | |
1313 | nfs4_file_downgrade(struct file *filp, unsigned int share_access) | |
1314 | { | |
1315 | if (share_access & NFS4_SHARE_ACCESS_WRITE) { | |
7eaa36e2 | 1316 | put_write_access(filp->f_path.dentry->d_inode); |
1da177e4 LT |
1317 | filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE; |
1318 | } | |
1319 | } | |
1320 | ||
1321 | /* | |
1322 | * Recall a delegation | |
1323 | */ | |
1324 | static int | |
1325 | do_recall(void *__dp) | |
1326 | { | |
1327 | struct nfs4_delegation *dp = __dp; | |
1328 | ||
1da177e4 LT |
1329 | nfsd4_cb_recall(dp); |
1330 | return 0; | |
1331 | } | |
1332 | ||
1333 | /* | |
1334 | * Spawn a thread to perform a recall on the delegation represented | |
1335 | * by the lease (file_lock) | |
1336 | * | |
1337 | * Called from break_lease() with lock_kernel() held. | |
1338 | * Note: we assume break_lease will only call this *once* for any given | |
1339 | * lease. | |
1340 | */ | |
1341 | static | |
1342 | void nfsd_break_deleg_cb(struct file_lock *fl) | |
1343 | { | |
1344 | struct nfs4_delegation *dp= (struct nfs4_delegation *)fl->fl_owner; | |
1345 | struct task_struct *t; | |
1346 | ||
1347 | dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl); | |
1348 | if (!dp) | |
1349 | return; | |
1350 | ||
1351 | /* We're assuming the state code never drops its reference | |
1352 | * without first removing the lease. Since we're in this lease | |
1353 | * callback (and since the lease code is serialized by the kernel | |
1354 | * lock) we know the server hasn't removed the lease yet, we know | |
1355 | * it's safe to take a reference: */ | |
1356 | atomic_inc(&dp->dl_count); | |
1357 | ||
1358 | spin_lock(&recall_lock); | |
1359 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); | |
1360 | spin_unlock(&recall_lock); | |
1361 | ||
1362 | /* only place dl_time is set. protected by lock_kernel*/ | |
1363 | dp->dl_time = get_seconds(); | |
1364 | ||
1365 | /* XXX need to merge NFSD_LEASE_TIME with fs/locks.c:lease_break_time */ | |
1366 | fl->fl_break_time = jiffies + NFSD_LEASE_TIME * HZ; | |
1367 | ||
1368 | t = kthread_run(do_recall, dp, "%s", "nfs4_cb_recall"); | |
1369 | if (IS_ERR(t)) { | |
1370 | struct nfs4_client *clp = dp->dl_client; | |
1371 | ||
1372 | printk(KERN_INFO "NFSD: Callback thread failed for " | |
1373 | "for client (clientid %08x/%08x)\n", | |
1374 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
1375 | nfs4_put_delegation(dp); | |
1376 | } | |
1377 | } | |
1378 | ||
1379 | /* | |
1380 | * The file_lock is being reapd. | |
1381 | * | |
1382 | * Called by locks_free_lock() with lock_kernel() held. | |
1383 | */ | |
1384 | static | |
1385 | void nfsd_release_deleg_cb(struct file_lock *fl) | |
1386 | { | |
1387 | struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; | |
1388 | ||
1389 | dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count)); | |
1390 | ||
1391 | if (!(fl->fl_flags & FL_LEASE) || !dp) | |
1392 | return; | |
1393 | dp->dl_flock = NULL; | |
1394 | } | |
1395 | ||
1396 | /* | |
1397 | * Set the delegation file_lock back pointer. | |
1398 | * | |
1399 | * Called from __setlease() with lock_kernel() held. | |
1400 | */ | |
1401 | static | |
1402 | void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl) | |
1403 | { | |
1404 | struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner; | |
1405 | ||
1406 | dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp); | |
1407 | if (!dp) | |
1408 | return; | |
1409 | dp->dl_flock = new; | |
1410 | } | |
1411 | ||
1412 | /* | |
1413 | * Called from __setlease() with lock_kernel() held | |
1414 | */ | |
1415 | static | |
1416 | int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try) | |
1417 | { | |
1418 | struct nfs4_delegation *onlistd = | |
1419 | (struct nfs4_delegation *)onlist->fl_owner; | |
1420 | struct nfs4_delegation *tryd = | |
1421 | (struct nfs4_delegation *)try->fl_owner; | |
1422 | ||
1423 | if (onlist->fl_lmops != try->fl_lmops) | |
1424 | return 0; | |
1425 | ||
1426 | return onlistd->dl_client == tryd->dl_client; | |
1427 | } | |
1428 | ||
1429 | ||
1430 | static | |
1431 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
1432 | { | |
1433 | if (arg & F_UNLCK) | |
1434 | return lease_modify(onlist, arg); | |
1435 | else | |
1436 | return -EAGAIN; | |
1437 | } | |
1438 | ||
fd39ca9a | 1439 | static struct lock_manager_operations nfsd_lease_mng_ops = { |
1da177e4 LT |
1440 | .fl_break = nfsd_break_deleg_cb, |
1441 | .fl_release_private = nfsd_release_deleg_cb, | |
1442 | .fl_copy_lock = nfsd_copy_lock_deleg_cb, | |
1443 | .fl_mylease = nfsd_same_client_deleg_cb, | |
1444 | .fl_change = nfsd_change_deleg_cb, | |
1445 | }; | |
1446 | ||
1447 | ||
b37ad28b | 1448 | __be32 |
1da177e4 LT |
1449 | nfsd4_process_open1(struct nfsd4_open *open) |
1450 | { | |
1da177e4 LT |
1451 | clientid_t *clientid = &open->op_clientid; |
1452 | struct nfs4_client *clp = NULL; | |
1453 | unsigned int strhashval; | |
1454 | struct nfs4_stateowner *sop = NULL; | |
1455 | ||
1da177e4 | 1456 | if (!check_name(open->op_owner)) |
0f442aa2 | 1457 | return nfserr_inval; |
1da177e4 LT |
1458 | |
1459 | if (STALE_CLIENTID(&open->op_clientid)) | |
1460 | return nfserr_stale_clientid; | |
1461 | ||
1462 | strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner); | |
1463 | sop = find_openstateowner_str(strhashval, open); | |
0f442aa2 BF |
1464 | open->op_stateowner = sop; |
1465 | if (!sop) { | |
1466 | /* Make sure the client's lease hasn't expired. */ | |
1da177e4 LT |
1467 | clp = find_confirmed_client(clientid); |
1468 | if (clp == NULL) | |
0f442aa2 BF |
1469 | return nfserr_expired; |
1470 | goto renew; | |
1da177e4 | 1471 | } |
0f442aa2 BF |
1472 | if (!sop->so_confirmed) { |
1473 | /* Replace unconfirmed owners without checking for replay. */ | |
1474 | clp = sop->so_client; | |
1475 | release_stateowner(sop); | |
1476 | open->op_stateowner = NULL; | |
1477 | goto renew; | |
1478 | } | |
1479 | if (open->op_seqid == sop->so_seqid - 1) { | |
1480 | if (sop->so_replay.rp_buflen) | |
a90b061c | 1481 | return nfserr_replay_me; |
0f442aa2 BF |
1482 | /* The original OPEN failed so spectacularly |
1483 | * that we don't even have replay data saved! | |
1484 | * Therefore, we have no choice but to continue | |
1485 | * processing this OPEN; presumably, we'll | |
1486 | * fail again for the same reason. | |
1487 | */ | |
1488 | dprintk("nfsd4_process_open1: replay with no replay cache\n"); | |
1489 | goto renew; | |
1490 | } | |
1491 | if (open->op_seqid != sop->so_seqid) | |
1492 | return nfserr_bad_seqid; | |
1da177e4 | 1493 | renew: |
0f442aa2 BF |
1494 | if (open->op_stateowner == NULL) { |
1495 | sop = alloc_init_open_stateowner(strhashval, clp, open); | |
1496 | if (sop == NULL) | |
1497 | return nfserr_resource; | |
1498 | open->op_stateowner = sop; | |
1499 | } | |
1500 | list_del_init(&sop->so_close_lru); | |
1da177e4 | 1501 | renew_client(sop->so_client); |
0f442aa2 | 1502 | return nfs_ok; |
1da177e4 LT |
1503 | } |
1504 | ||
b37ad28b | 1505 | static inline __be32 |
4a6e43e6 N |
1506 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
1507 | { | |
1508 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
1509 | return nfserr_openmode; | |
1510 | else | |
1511 | return nfs_ok; | |
1512 | } | |
1513 | ||
52f4fb43 N |
1514 | static struct nfs4_delegation * |
1515 | find_delegation_file(struct nfs4_file *fp, stateid_t *stid) | |
1516 | { | |
1517 | struct nfs4_delegation *dp; | |
1518 | ||
ea1da636 | 1519 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) { |
52f4fb43 N |
1520 | if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) |
1521 | return dp; | |
1522 | } | |
1523 | return NULL; | |
1524 | } | |
1525 | ||
b37ad28b | 1526 | static __be32 |
567d9829 N |
1527 | nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, |
1528 | struct nfs4_delegation **dp) | |
1529 | { | |
1530 | int flags; | |
b37ad28b | 1531 | __be32 status = nfserr_bad_stateid; |
567d9829 N |
1532 | |
1533 | *dp = find_delegation_file(fp, &open->op_delegate_stateid); | |
1534 | if (*dp == NULL) | |
c44c5eeb | 1535 | goto out; |
567d9829 N |
1536 | flags = open->op_share_access == NFS4_SHARE_ACCESS_READ ? |
1537 | RD_STATE : WR_STATE; | |
1538 | status = nfs4_check_delegmode(*dp, flags); | |
1539 | if (status) | |
1540 | *dp = NULL; | |
c44c5eeb N |
1541 | out: |
1542 | if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
1543 | return nfs_ok; | |
1544 | if (status) | |
1545 | return status; | |
1546 | open->op_stateowner->so_confirmed = 1; | |
1547 | return nfs_ok; | |
567d9829 N |
1548 | } |
1549 | ||
b37ad28b | 1550 | static __be32 |
1da177e4 LT |
1551 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) |
1552 | { | |
1553 | struct nfs4_stateid *local; | |
b37ad28b | 1554 | __be32 status = nfserr_share_denied; |
1da177e4 LT |
1555 | struct nfs4_stateowner *sop = open->op_stateowner; |
1556 | ||
8beefa24 | 1557 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
1558 | /* ignore lock owners */ |
1559 | if (local->st_stateowner->so_is_open_owner == 0) | |
1560 | continue; | |
1561 | /* remember if we have seen this open owner */ | |
1562 | if (local->st_stateowner == sop) | |
1563 | *stpp = local; | |
1564 | /* check for conflicting share reservations */ | |
1565 | if (!test_share(local, open)) | |
1566 | goto out; | |
1567 | } | |
1568 | status = 0; | |
1569 | out: | |
1570 | return status; | |
1571 | } | |
1572 | ||
5ac049ac N |
1573 | static inline struct nfs4_stateid * |
1574 | nfs4_alloc_stateid(void) | |
1575 | { | |
1576 | return kmem_cache_alloc(stateid_slab, GFP_KERNEL); | |
1577 | } | |
1578 | ||
b37ad28b | 1579 | static __be32 |
1da177e4 | 1580 | nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, |
567d9829 | 1581 | struct nfs4_delegation *dp, |
1da177e4 LT |
1582 | struct svc_fh *cur_fh, int flags) |
1583 | { | |
1584 | struct nfs4_stateid *stp; | |
1da177e4 | 1585 | |
5ac049ac | 1586 | stp = nfs4_alloc_stateid(); |
1da177e4 LT |
1587 | if (stp == NULL) |
1588 | return nfserr_resource; | |
1589 | ||
567d9829 N |
1590 | if (dp) { |
1591 | get_file(dp->dl_vfs_file); | |
1592 | stp->st_vfs_file = dp->dl_vfs_file; | |
1593 | } else { | |
b37ad28b | 1594 | __be32 status; |
567d9829 N |
1595 | status = nfsd_open(rqstp, cur_fh, S_IFREG, flags, |
1596 | &stp->st_vfs_file); | |
1597 | if (status) { | |
1598 | if (status == nfserr_dropit) | |
1599 | status = nfserr_jukebox; | |
5ac049ac | 1600 | kmem_cache_free(stateid_slab, stp); |
567d9829 N |
1601 | return status; |
1602 | } | |
1da177e4 | 1603 | } |
1da177e4 LT |
1604 | *stpp = stp; |
1605 | return 0; | |
1606 | } | |
1607 | ||
b37ad28b | 1608 | static inline __be32 |
1da177e4 LT |
1609 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
1610 | struct nfsd4_open *open) | |
1611 | { | |
1612 | struct iattr iattr = { | |
1613 | .ia_valid = ATTR_SIZE, | |
1614 | .ia_size = 0, | |
1615 | }; | |
1616 | if (!open->op_truncate) | |
1617 | return 0; | |
1618 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 1619 | return nfserr_inval; |
1da177e4 LT |
1620 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
1621 | } | |
1622 | ||
b37ad28b | 1623 | static __be32 |
1da177e4 LT |
1624 | nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open) |
1625 | { | |
1626 | struct file *filp = stp->st_vfs_file; | |
7eaa36e2 | 1627 | struct inode *inode = filp->f_path.dentry->d_inode; |
6c26d08f | 1628 | unsigned int share_access, new_writer; |
b37ad28b | 1629 | __be32 status; |
1da177e4 LT |
1630 | |
1631 | set_access(&share_access, stp->st_access_bmap); | |
6c26d08f BF |
1632 | new_writer = (~share_access) & open->op_share_access |
1633 | & NFS4_SHARE_ACCESS_WRITE; | |
1da177e4 | 1634 | |
6c26d08f | 1635 | if (new_writer) { |
b37ad28b AV |
1636 | int err = get_write_access(inode); |
1637 | if (err) | |
1638 | return nfserrno(err); | |
6c26d08f | 1639 | } |
1da177e4 LT |
1640 | status = nfsd4_truncate(rqstp, cur_fh, open); |
1641 | if (status) { | |
6c26d08f BF |
1642 | if (new_writer) |
1643 | put_write_access(inode); | |
1da177e4 LT |
1644 | return status; |
1645 | } | |
1646 | /* remember the open */ | |
6c26d08f | 1647 | filp->f_mode |= open->op_share_access; |
1da177e4 LT |
1648 | set_bit(open->op_share_access, &stp->st_access_bmap); |
1649 | set_bit(open->op_share_deny, &stp->st_deny_bmap); | |
1650 | ||
1651 | return nfs_ok; | |
1652 | } | |
1653 | ||
1654 | ||
1da177e4 | 1655 | static void |
37515177 | 1656 | nfs4_set_claim_prev(struct nfsd4_open *open) |
1da177e4 | 1657 | { |
37515177 N |
1658 | open->op_stateowner->so_confirmed = 1; |
1659 | open->op_stateowner->so_client->cl_firststate = 1; | |
1da177e4 LT |
1660 | } |
1661 | ||
1662 | /* | |
1663 | * Attempt to hand out a delegation. | |
1664 | */ | |
1665 | static void | |
1666 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) | |
1667 | { | |
1668 | struct nfs4_delegation *dp; | |
1669 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
1670 | struct nfs4_callback *cb = &sop->so_client->cl_callback; | |
1671 | struct file_lock fl, *flp = &fl; | |
1672 | int status, flag = 0; | |
1673 | ||
1674 | flag = NFS4_OPEN_DELEGATE_NONE; | |
7b190fec N |
1675 | open->op_recall = 0; |
1676 | switch (open->op_claim_type) { | |
1677 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
1678 | if (!atomic_read(&cb->cb_set)) | |
1679 | open->op_recall = 1; | |
1680 | flag = open->op_delegate_type; | |
1681 | if (flag == NFS4_OPEN_DELEGATE_NONE) | |
1682 | goto out; | |
1683 | break; | |
1684 | case NFS4_OPEN_CLAIM_NULL: | |
1685 | /* Let's not give out any delegations till everyone's | |
1686 | * had the chance to reclaim theirs.... */ | |
1687 | if (nfs4_in_grace()) | |
1688 | goto out; | |
1689 | if (!atomic_read(&cb->cb_set) || !sop->so_confirmed) | |
1690 | goto out; | |
1691 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | |
1692 | flag = NFS4_OPEN_DELEGATE_WRITE; | |
1693 | else | |
1694 | flag = NFS4_OPEN_DELEGATE_READ; | |
1695 | break; | |
1696 | default: | |
1697 | goto out; | |
1698 | } | |
1da177e4 LT |
1699 | |
1700 | dp = alloc_init_deleg(sop->so_client, stp, fh, flag); | |
1701 | if (dp == NULL) { | |
1702 | flag = NFS4_OPEN_DELEGATE_NONE; | |
1703 | goto out; | |
1704 | } | |
1705 | locks_init_lock(&fl); | |
1706 | fl.fl_lmops = &nfsd_lease_mng_ops; | |
1707 | fl.fl_flags = FL_LEASE; | |
1708 | fl.fl_end = OFFSET_MAX; | |
1709 | fl.fl_owner = (fl_owner_t)dp; | |
1710 | fl.fl_file = stp->st_vfs_file; | |
1711 | fl.fl_pid = current->tgid; | |
1712 | ||
1713 | /* setlease checks to see if delegation should be handed out. | |
1714 | * the lock_manager callbacks fl_mylease and fl_change are used | |
1715 | */ | |
1716 | if ((status = setlease(stp->st_vfs_file, | |
1717 | flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK, &flp))) { | |
1718 | dprintk("NFSD: setlease failed [%d], no delegation\n", status); | |
c907132d | 1719 | unhash_delegation(dp); |
1da177e4 LT |
1720 | flag = NFS4_OPEN_DELEGATE_NONE; |
1721 | goto out; | |
1722 | } | |
1723 | ||
1724 | memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); | |
1725 | ||
1726 | dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n", | |
1727 | dp->dl_stateid.si_boot, | |
1728 | dp->dl_stateid.si_stateownerid, | |
1729 | dp->dl_stateid.si_fileid, | |
1730 | dp->dl_stateid.si_generation); | |
1731 | out: | |
7b190fec N |
1732 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS |
1733 | && flag == NFS4_OPEN_DELEGATE_NONE | |
1734 | && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) | |
1735 | printk("NFSD: WARNING: refusing delegation reclaim\n"); | |
1da177e4 LT |
1736 | open->op_delegate_type = flag; |
1737 | } | |
1738 | ||
1739 | /* | |
1740 | * called with nfs4_lock_state() held. | |
1741 | */ | |
b37ad28b | 1742 | __be32 |
1da177e4 LT |
1743 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
1744 | { | |
1745 | struct nfs4_file *fp = NULL; | |
1746 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
1747 | struct nfs4_stateid *stp = NULL; | |
567d9829 | 1748 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 1749 | __be32 status; |
1da177e4 LT |
1750 | |
1751 | status = nfserr_inval; | |
ba5a6a19 BF |
1752 | if (!access_valid(open->op_share_access) |
1753 | || !deny_valid(open->op_share_deny)) | |
1da177e4 LT |
1754 | goto out; |
1755 | /* | |
1756 | * Lookup file; if found, lookup stateid and check open request, | |
1757 | * and check for delegations in the process of being recalled. | |
1758 | * If not found, create the nfs4_file struct | |
1759 | */ | |
1760 | fp = find_file(ino); | |
1761 | if (fp) { | |
1762 | if ((status = nfs4_check_open(fp, open, &stp))) | |
1763 | goto out; | |
c44c5eeb N |
1764 | status = nfs4_check_deleg(fp, open, &dp); |
1765 | if (status) | |
1766 | goto out; | |
1da177e4 | 1767 | } else { |
c44c5eeb N |
1768 | status = nfserr_bad_stateid; |
1769 | if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
1770 | goto out; | |
1da177e4 LT |
1771 | status = nfserr_resource; |
1772 | fp = alloc_init_file(ino); | |
1773 | if (fp == NULL) | |
1774 | goto out; | |
1775 | } | |
1776 | ||
1777 | /* | |
1778 | * OPEN the file, or upgrade an existing OPEN. | |
1779 | * If truncate fails, the OPEN fails. | |
1780 | */ | |
1781 | if (stp) { | |
1782 | /* Stateid was found, this is an OPEN upgrade */ | |
1783 | status = nfs4_upgrade_open(rqstp, current_fh, stp, open); | |
1784 | if (status) | |
1785 | goto out; | |
444c2c07 | 1786 | update_stateid(&stp->st_stateid); |
1da177e4 LT |
1787 | } else { |
1788 | /* Stateid was not found, this is a new OPEN */ | |
1789 | int flags = 0; | |
9ecb6a08 BF |
1790 | if (open->op_share_access & NFS4_SHARE_ACCESS_READ) |
1791 | flags |= MAY_READ; | |
1da177e4 | 1792 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
9ecb6a08 | 1793 | flags |= MAY_WRITE; |
567d9829 N |
1794 | status = nfs4_new_open(rqstp, &stp, dp, current_fh, flags); |
1795 | if (status) | |
1da177e4 LT |
1796 | goto out; |
1797 | init_stateid(stp, fp, open); | |
1798 | status = nfsd4_truncate(rqstp, current_fh, open); | |
1799 | if (status) { | |
1800 | release_stateid(stp, OPEN_STATE); | |
1801 | goto out; | |
1802 | } | |
1803 | } | |
1804 | memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
1805 | ||
1806 | /* | |
1807 | * Attempt to hand out a delegation. No error return, because the | |
1808 | * OPEN succeeds even if we fail. | |
1809 | */ | |
1810 | nfs4_open_delegation(current_fh, open, stp); | |
1811 | ||
1812 | status = nfs_ok; | |
1813 | ||
1814 | dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n", | |
1815 | stp->st_stateid.si_boot, stp->st_stateid.si_stateownerid, | |
1816 | stp->st_stateid.si_fileid, stp->st_stateid.si_generation); | |
1817 | out: | |
13cd2184 N |
1818 | if (fp) |
1819 | put_nfs4_file(fp); | |
37515177 N |
1820 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
1821 | nfs4_set_claim_prev(open); | |
1da177e4 LT |
1822 | /* |
1823 | * To finish the open response, we just need to set the rflags. | |
1824 | */ | |
1825 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
1826 | if (!open->op_stateowner->so_confirmed) | |
1827 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; | |
1828 | ||
1829 | return status; | |
1830 | } | |
1831 | ||
58da282b | 1832 | static struct workqueue_struct *laundry_wq; |
c4028958 DH |
1833 | static void laundromat_main(struct work_struct *); |
1834 | static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); | |
1da177e4 | 1835 | |
b37ad28b | 1836 | __be32 |
b591480b BF |
1837 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
1838 | clientid_t *clid) | |
1da177e4 LT |
1839 | { |
1840 | struct nfs4_client *clp; | |
b37ad28b | 1841 | __be32 status; |
1da177e4 LT |
1842 | |
1843 | nfs4_lock_state(); | |
1844 | dprintk("process_renew(%08x/%08x): starting\n", | |
1845 | clid->cl_boot, clid->cl_id); | |
1846 | status = nfserr_stale_clientid; | |
1847 | if (STALE_CLIENTID(clid)) | |
1848 | goto out; | |
1849 | clp = find_confirmed_client(clid); | |
1850 | status = nfserr_expired; | |
1851 | if (clp == NULL) { | |
1852 | /* We assume the client took too long to RENEW. */ | |
1853 | dprintk("nfsd4_renew: clientid not found!\n"); | |
1854 | goto out; | |
1855 | } | |
1856 | renew_client(clp); | |
1857 | status = nfserr_cb_path_down; | |
ea1da636 | 1858 | if (!list_empty(&clp->cl_delegations) |
1da177e4 LT |
1859 | && !atomic_read(&clp->cl_callback.cb_set)) |
1860 | goto out; | |
1861 | status = nfs_ok; | |
1862 | out: | |
1863 | nfs4_unlock_state(); | |
1864 | return status; | |
1865 | } | |
1866 | ||
a76b4319 N |
1867 | static void |
1868 | end_grace(void) | |
1869 | { | |
1870 | dprintk("NFSD: end of grace period\n"); | |
c7b9a459 | 1871 | nfsd4_recdir_purge_old(); |
a76b4319 N |
1872 | in_grace = 0; |
1873 | } | |
1874 | ||
fd39ca9a | 1875 | static time_t |
1da177e4 LT |
1876 | nfs4_laundromat(void) |
1877 | { | |
1878 | struct nfs4_client *clp; | |
1879 | struct nfs4_stateowner *sop; | |
1880 | struct nfs4_delegation *dp; | |
1881 | struct list_head *pos, *next, reaplist; | |
1882 | time_t cutoff = get_seconds() - NFSD_LEASE_TIME; | |
1883 | time_t t, clientid_val = NFSD_LEASE_TIME; | |
1884 | time_t u, test_val = NFSD_LEASE_TIME; | |
1885 | ||
1886 | nfs4_lock_state(); | |
1887 | ||
1888 | dprintk("NFSD: laundromat service - starting\n"); | |
a76b4319 N |
1889 | if (in_grace) |
1890 | end_grace(); | |
1da177e4 LT |
1891 | list_for_each_safe(pos, next, &client_lru) { |
1892 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1893 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
1894 | t = clp->cl_time - cutoff; | |
1895 | if (clientid_val > t) | |
1896 | clientid_val = t; | |
1897 | break; | |
1898 | } | |
1899 | dprintk("NFSD: purging unused client (clientid %08x)\n", | |
1900 | clp->cl_clientid.cl_id); | |
c7b9a459 | 1901 | nfsd4_remove_clid_dir(clp); |
1da177e4 LT |
1902 | expire_client(clp); |
1903 | } | |
1904 | INIT_LIST_HEAD(&reaplist); | |
1905 | spin_lock(&recall_lock); | |
1906 | list_for_each_safe(pos, next, &del_recall_lru) { | |
1907 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
1908 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
1909 | u = dp->dl_time - cutoff; | |
1910 | if (test_val > u) | |
1911 | test_val = u; | |
1912 | break; | |
1913 | } | |
1914 | dprintk("NFSD: purging unused delegation dp %p, fp %p\n", | |
1915 | dp, dp->dl_flock); | |
1916 | list_move(&dp->dl_recall_lru, &reaplist); | |
1917 | } | |
1918 | spin_unlock(&recall_lock); | |
1919 | list_for_each_safe(pos, next, &reaplist) { | |
1920 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
1921 | list_del_init(&dp->dl_recall_lru); | |
1922 | unhash_delegation(dp); | |
1923 | } | |
1924 | test_val = NFSD_LEASE_TIME; | |
1925 | list_for_each_safe(pos, next, &close_lru) { | |
1926 | sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); | |
1927 | if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { | |
1928 | u = sop->so_time - cutoff; | |
1929 | if (test_val > u) | |
1930 | test_val = u; | |
1931 | break; | |
1932 | } | |
1933 | dprintk("NFSD: purging unused open stateowner (so_id %d)\n", | |
1934 | sop->so_id); | |
358dd55a | 1935 | release_stateowner(sop); |
1da177e4 LT |
1936 | } |
1937 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
1938 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
1939 | nfs4_unlock_state(); | |
1940 | return clientid_val; | |
1941 | } | |
1942 | ||
1943 | void | |
c4028958 | 1944 | laundromat_main(struct work_struct *not_used) |
1da177e4 LT |
1945 | { |
1946 | time_t t; | |
1947 | ||
1948 | t = nfs4_laundromat(); | |
1949 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); | |
58da282b | 1950 | queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); |
1da177e4 LT |
1951 | } |
1952 | ||
fd39ca9a | 1953 | static struct nfs4_stateowner * |
f8816512 N |
1954 | search_close_lru(u32 st_id, int flags) |
1955 | { | |
1da177e4 LT |
1956 | struct nfs4_stateowner *local = NULL; |
1957 | ||
1da177e4 LT |
1958 | if (flags & CLOSE_STATE) { |
1959 | list_for_each_entry(local, &close_lru, so_close_lru) { | |
1960 | if (local->so_id == st_id) | |
1961 | return local; | |
1962 | } | |
1963 | } | |
1964 | return NULL; | |
1965 | } | |
1966 | ||
1967 | static inline int | |
1968 | nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) | |
1969 | { | |
7eaa36e2 | 1970 | return fhp->fh_dentry->d_inode != stp->st_vfs_file->f_path.dentry->d_inode; |
1da177e4 LT |
1971 | } |
1972 | ||
1973 | static int | |
1974 | STALE_STATEID(stateid_t *stateid) | |
1975 | { | |
1976 | if (stateid->si_boot == boot_time) | |
1977 | return 0; | |
849823c5 | 1978 | dprintk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n", |
1da177e4 LT |
1979 | stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, |
1980 | stateid->si_generation); | |
1981 | return 1; | |
1982 | } | |
1983 | ||
1984 | static inline int | |
1985 | access_permit_read(unsigned long access_bmap) | |
1986 | { | |
1987 | return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || | |
1988 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || | |
1989 | test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); | |
1990 | } | |
1991 | ||
1992 | static inline int | |
1993 | access_permit_write(unsigned long access_bmap) | |
1994 | { | |
1995 | return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || | |
1996 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); | |
1997 | } | |
1998 | ||
1999 | static | |
b37ad28b | 2000 | __be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags) |
1da177e4 | 2001 | { |
b37ad28b | 2002 | __be32 status = nfserr_openmode; |
1da177e4 LT |
2003 | |
2004 | if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) | |
2005 | goto out; | |
2006 | if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) | |
2007 | goto out; | |
2008 | status = nfs_ok; | |
2009 | out: | |
2010 | return status; | |
2011 | } | |
2012 | ||
b37ad28b | 2013 | static inline __be32 |
1da177e4 LT |
2014 | check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) |
2015 | { | |
2016 | /* Trying to call delegreturn with a special stateid? Yuch: */ | |
2017 | if (!(flags & (RD_STATE | WR_STATE))) | |
2018 | return nfserr_bad_stateid; | |
2019 | else if (ONE_STATEID(stateid) && (flags & RD_STATE)) | |
2020 | return nfs_ok; | |
2021 | else if (nfs4_in_grace()) { | |
2022 | /* Answer in remaining cases depends on existance of | |
2023 | * conflicting state; so we must wait out the grace period. */ | |
2024 | return nfserr_grace; | |
2025 | } else if (flags & WR_STATE) | |
2026 | return nfs4_share_conflict(current_fh, | |
2027 | NFS4_SHARE_DENY_WRITE); | |
2028 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
2029 | return nfs4_share_conflict(current_fh, | |
2030 | NFS4_SHARE_DENY_READ); | |
2031 | } | |
2032 | ||
2033 | /* | |
2034 | * Allow READ/WRITE during grace period on recovered state only for files | |
2035 | * that are not able to provide mandatory locking. | |
2036 | */ | |
2037 | static inline int | |
2038 | io_during_grace_disallowed(struct inode *inode, int flags) | |
2039 | { | |
2040 | return nfs4_in_grace() && (flags & (RD_STATE | WR_STATE)) | |
2041 | && MANDATORY_LOCK(inode); | |
2042 | } | |
2043 | ||
2044 | /* | |
2045 | * Checks for stateid operations | |
2046 | */ | |
b37ad28b | 2047 | __be32 |
1da177e4 LT |
2048 | nfs4_preprocess_stateid_op(struct svc_fh *current_fh, stateid_t *stateid, int flags, struct file **filpp) |
2049 | { | |
2050 | struct nfs4_stateid *stp = NULL; | |
2051 | struct nfs4_delegation *dp = NULL; | |
2052 | stateid_t *stidp; | |
2053 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
b37ad28b | 2054 | __be32 status; |
1da177e4 LT |
2055 | |
2056 | dprintk("NFSD: preprocess_stateid_op: stateid = (%08x/%08x/%08x/%08x)\n", | |
2057 | stateid->si_boot, stateid->si_stateownerid, | |
2058 | stateid->si_fileid, stateid->si_generation); | |
2059 | if (filpp) | |
2060 | *filpp = NULL; | |
2061 | ||
2062 | if (io_during_grace_disallowed(ino, flags)) | |
2063 | return nfserr_grace; | |
2064 | ||
2065 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
2066 | return check_special_stateids(current_fh, stateid, flags); | |
2067 | ||
2068 | /* STALE STATEID */ | |
2069 | status = nfserr_stale_stateid; | |
2070 | if (STALE_STATEID(stateid)) | |
2071 | goto out; | |
2072 | ||
2073 | /* BAD STATEID */ | |
2074 | status = nfserr_bad_stateid; | |
2075 | if (!stateid->si_fileid) { /* delegation stateid */ | |
2076 | if(!(dp = find_delegation_stateid(ino, stateid))) { | |
2077 | dprintk("NFSD: delegation stateid not found\n"); | |
1da177e4 LT |
2078 | goto out; |
2079 | } | |
2080 | stidp = &dp->dl_stateid; | |
2081 | } else { /* open or lock stateid */ | |
2082 | if (!(stp = find_stateid(stateid, flags))) { | |
2083 | dprintk("NFSD: open or lock stateid not found\n"); | |
1da177e4 LT |
2084 | goto out; |
2085 | } | |
2086 | if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp)) | |
2087 | goto out; | |
2088 | if (!stp->st_stateowner->so_confirmed) | |
2089 | goto out; | |
2090 | stidp = &stp->st_stateid; | |
2091 | } | |
2092 | if (stateid->si_generation > stidp->si_generation) | |
2093 | goto out; | |
2094 | ||
2095 | /* OLD STATEID */ | |
2096 | status = nfserr_old_stateid; | |
2097 | if (stateid->si_generation < stidp->si_generation) | |
2098 | goto out; | |
2099 | if (stp) { | |
2100 | if ((status = nfs4_check_openmode(stp,flags))) | |
2101 | goto out; | |
2102 | renew_client(stp->st_stateowner->so_client); | |
2103 | if (filpp) | |
2104 | *filpp = stp->st_vfs_file; | |
2105 | } else if (dp) { | |
2106 | if ((status = nfs4_check_delegmode(dp, flags))) | |
2107 | goto out; | |
2108 | renew_client(dp->dl_client); | |
2109 | if (flags & DELEG_RET) | |
2110 | unhash_delegation(dp); | |
2111 | if (filpp) | |
2112 | *filpp = dp->dl_vfs_file; | |
2113 | } | |
2114 | status = nfs_ok; | |
2115 | out: | |
2116 | return status; | |
2117 | } | |
2118 | ||
4c4cd222 N |
2119 | static inline int |
2120 | setlkflg (int type) | |
2121 | { | |
2122 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
2123 | RD_STATE : WR_STATE; | |
2124 | } | |
1da177e4 LT |
2125 | |
2126 | /* | |
2127 | * Checks for sequence id mutating operations. | |
2128 | */ | |
b37ad28b | 2129 | static __be32 |
4c4cd222 | 2130 | 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 | 2131 | { |
1da177e4 LT |
2132 | struct nfs4_stateid *stp; |
2133 | struct nfs4_stateowner *sop; | |
2134 | ||
2135 | dprintk("NFSD: preprocess_seqid_op: seqid=%d " | |
2136 | "stateid = (%08x/%08x/%08x/%08x)\n", seqid, | |
2137 | stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, | |
2138 | stateid->si_generation); | |
3a4f98bb | 2139 | |
1da177e4 LT |
2140 | *stpp = NULL; |
2141 | *sopp = NULL; | |
2142 | ||
1da177e4 LT |
2143 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { |
2144 | printk("NFSD: preprocess_seqid_op: magic stateid!\n"); | |
3a4f98bb | 2145 | return nfserr_bad_stateid; |
1da177e4 LT |
2146 | } |
2147 | ||
1da177e4 | 2148 | if (STALE_STATEID(stateid)) |
3a4f98bb | 2149 | return nfserr_stale_stateid; |
1da177e4 LT |
2150 | /* |
2151 | * We return BAD_STATEID if filehandle doesn't match stateid, | |
2152 | * the confirmed flag is incorrecly set, or the generation | |
2153 | * number is incorrect. | |
1da177e4 | 2154 | */ |
f8816512 N |
2155 | stp = find_stateid(stateid, flags); |
2156 | if (stp == NULL) { | |
2157 | /* | |
2158 | * Also, we should make sure this isn't just the result of | |
2159 | * a replayed close: | |
2160 | */ | |
2161 | sop = search_close_lru(stateid->si_stateownerid, flags); | |
2162 | if (sop == NULL) | |
2163 | return nfserr_bad_stateid; | |
2164 | *sopp = sop; | |
2165 | goto check_replay; | |
2166 | } | |
1da177e4 | 2167 | |
4c4cd222 | 2168 | if (lock) { |
1da177e4 | 2169 | struct nfs4_stateowner *sop = stp->st_stateowner; |
4c4cd222 | 2170 | clientid_t *lockclid = &lock->v.new.clientid; |
1da177e4 | 2171 | struct nfs4_client *clp = sop->so_client; |
4c4cd222 | 2172 | int lkflg = 0; |
b37ad28b | 2173 | __be32 status; |
4c4cd222 N |
2174 | |
2175 | lkflg = setlkflg(lock->lk_type); | |
2176 | ||
2177 | if (lock->lk_is_new) { | |
2178 | if (!sop->so_is_open_owner) | |
2179 | return nfserr_bad_stateid; | |
2180 | if (!cmp_clid(&clp->cl_clientid, lockclid)) | |
2181 | return nfserr_bad_stateid; | |
2182 | /* stp is the open stateid */ | |
2183 | status = nfs4_check_openmode(stp, lkflg); | |
2184 | if (status) | |
2185 | return status; | |
2186 | } else { | |
2187 | /* stp is the lock stateid */ | |
2188 | status = nfs4_check_openmode(stp->st_openstp, lkflg); | |
2189 | if (status) | |
2190 | return status; | |
2191 | } | |
1da177e4 | 2192 | |
1da177e4 LT |
2193 | } |
2194 | ||
2195 | if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp)) { | |
2196 | printk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); | |
3a4f98bb | 2197 | return nfserr_bad_stateid; |
1da177e4 LT |
2198 | } |
2199 | ||
2200 | *stpp = stp; | |
2201 | *sopp = sop = stp->st_stateowner; | |
2202 | ||
2203 | /* | |
2204 | * We now validate the seqid and stateid generation numbers. | |
2205 | * For the moment, we ignore the possibility of | |
2206 | * generation number wraparound. | |
2207 | */ | |
bd9aac52 | 2208 | if (seqid != sop->so_seqid) |
1da177e4 LT |
2209 | goto check_replay; |
2210 | ||
3a4f98bb N |
2211 | if (sop->so_confirmed && flags & CONFIRM) { |
2212 | printk("NFSD: preprocess_seqid_op: expected" | |
2213 | " unconfirmed stateowner!\n"); | |
2214 | return nfserr_bad_stateid; | |
1da177e4 | 2215 | } |
3a4f98bb N |
2216 | if (!sop->so_confirmed && !(flags & CONFIRM)) { |
2217 | printk("NFSD: preprocess_seqid_op: stateowner not" | |
2218 | " confirmed yet!\n"); | |
2219 | return nfserr_bad_stateid; | |
1da177e4 LT |
2220 | } |
2221 | if (stateid->si_generation > stp->st_stateid.si_generation) { | |
2222 | printk("NFSD: preprocess_seqid_op: future stateid?!\n"); | |
3a4f98bb | 2223 | return nfserr_bad_stateid; |
1da177e4 LT |
2224 | } |
2225 | ||
1da177e4 LT |
2226 | if (stateid->si_generation < stp->st_stateid.si_generation) { |
2227 | printk("NFSD: preprocess_seqid_op: old stateid!\n"); | |
3a4f98bb | 2228 | return nfserr_old_stateid; |
1da177e4 | 2229 | } |
52fd004e | 2230 | renew_client(sop->so_client); |
3a4f98bb | 2231 | return nfs_ok; |
1da177e4 | 2232 | |
1da177e4 | 2233 | check_replay: |
bd9aac52 | 2234 | if (seqid == sop->so_seqid - 1) { |
849823c5 | 2235 | dprintk("NFSD: preprocess_seqid_op: retransmission?\n"); |
1da177e4 | 2236 | /* indicate replay to calling function */ |
a90b061c | 2237 | return nfserr_replay_me; |
1da177e4 | 2238 | } |
3a4f98bb N |
2239 | printk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n", |
2240 | sop->so_seqid, seqid); | |
2241 | *sopp = NULL; | |
2242 | return nfserr_bad_seqid; | |
1da177e4 LT |
2243 | } |
2244 | ||
b37ad28b | 2245 | __be32 |
ca364317 | 2246 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 2247 | struct nfsd4_open_confirm *oc) |
1da177e4 | 2248 | { |
b37ad28b | 2249 | __be32 status; |
1da177e4 LT |
2250 | struct nfs4_stateowner *sop; |
2251 | struct nfs4_stateid *stp; | |
2252 | ||
2253 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | |
ca364317 BF |
2254 | (int)cstate->current_fh.fh_dentry->d_name.len, |
2255 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 2256 | |
ca364317 | 2257 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
2258 | if (status) |
2259 | return status; | |
1da177e4 LT |
2260 | |
2261 | nfs4_lock_state(); | |
2262 | ||
ca364317 BF |
2263 | if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
2264 | oc->oc_seqid, &oc->oc_req_stateid, | |
1da177e4 LT |
2265 | CHECK_FH | CONFIRM | OPEN_STATE, |
2266 | &oc->oc_stateowner, &stp, NULL))) | |
2267 | goto out; | |
2268 | ||
2269 | sop = oc->oc_stateowner; | |
2270 | sop->so_confirmed = 1; | |
2271 | update_stateid(&stp->st_stateid); | |
2272 | memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2273 | dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d " | |
2274 | "stateid=(%08x/%08x/%08x/%08x)\n", oc->oc_seqid, | |
2275 | stp->st_stateid.si_boot, | |
2276 | stp->st_stateid.si_stateownerid, | |
2277 | stp->st_stateid.si_fileid, | |
2278 | stp->st_stateid.si_generation); | |
c7b9a459 N |
2279 | |
2280 | nfsd4_create_clid_dir(sop->so_client); | |
1da177e4 | 2281 | out: |
f2327d9a | 2282 | if (oc->oc_stateowner) { |
1da177e4 | 2283 | nfs4_get_stateowner(oc->oc_stateowner); |
a4f1706a | 2284 | cstate->replay_owner = oc->oc_stateowner; |
f2327d9a | 2285 | } |
1da177e4 LT |
2286 | nfs4_unlock_state(); |
2287 | return status; | |
2288 | } | |
2289 | ||
2290 | ||
2291 | /* | |
2292 | * unset all bits in union bitmap (bmap) that | |
2293 | * do not exist in share (from successful OPEN_DOWNGRADE) | |
2294 | */ | |
2295 | static void | |
2296 | reset_union_bmap_access(unsigned long access, unsigned long *bmap) | |
2297 | { | |
2298 | int i; | |
2299 | for (i = 1; i < 4; i++) { | |
2300 | if ((i & access) != i) | |
2301 | __clear_bit(i, bmap); | |
2302 | } | |
2303 | } | |
2304 | ||
2305 | static void | |
2306 | reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) | |
2307 | { | |
2308 | int i; | |
2309 | for (i = 0; i < 4; i++) { | |
2310 | if ((i & deny) != i) | |
2311 | __clear_bit(i, bmap); | |
2312 | } | |
2313 | } | |
2314 | ||
b37ad28b | 2315 | __be32 |
ca364317 BF |
2316 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
2317 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 2318 | struct nfsd4_open_downgrade *od) |
1da177e4 | 2319 | { |
b37ad28b | 2320 | __be32 status; |
1da177e4 LT |
2321 | struct nfs4_stateid *stp; |
2322 | unsigned int share_access; | |
2323 | ||
2324 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | |
ca364317 BF |
2325 | (int)cstate->current_fh.fh_dentry->d_name.len, |
2326 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 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(); | |
ca364317 BF |
2333 | if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
2334 | od->od_seqid, | |
1da177e4 LT |
2335 | &od->od_stateid, |
2336 | CHECK_FH | OPEN_STATE, | |
2337 | &od->od_stateowner, &stp, NULL))) | |
2338 | goto out; | |
2339 | ||
2340 | status = nfserr_inval; | |
2341 | if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { | |
2342 | dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
2343 | stp->st_access_bmap, od->od_share_access); | |
2344 | goto out; | |
2345 | } | |
2346 | if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { | |
2347 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", | |
2348 | stp->st_deny_bmap, od->od_share_deny); | |
2349 | goto out; | |
2350 | } | |
2351 | set_access(&share_access, stp->st_access_bmap); | |
2352 | nfs4_file_downgrade(stp->st_vfs_file, | |
2353 | share_access & ~od->od_share_access); | |
2354 | ||
2355 | reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap); | |
2356 | reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); | |
2357 | ||
2358 | update_stateid(&stp->st_stateid); | |
2359 | memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2360 | status = nfs_ok; | |
2361 | out: | |
f2327d9a | 2362 | if (od->od_stateowner) { |
1da177e4 | 2363 | nfs4_get_stateowner(od->od_stateowner); |
a4f1706a | 2364 | cstate->replay_owner = od->od_stateowner; |
f2327d9a | 2365 | } |
1da177e4 LT |
2366 | nfs4_unlock_state(); |
2367 | return status; | |
2368 | } | |
2369 | ||
2370 | /* | |
2371 | * nfs4_unlock_state() called after encode | |
2372 | */ | |
b37ad28b | 2373 | __be32 |
ca364317 | 2374 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 2375 | struct nfsd4_close *close) |
1da177e4 | 2376 | { |
b37ad28b | 2377 | __be32 status; |
1da177e4 LT |
2378 | struct nfs4_stateid *stp; |
2379 | ||
2380 | dprintk("NFSD: nfsd4_close on file %.*s\n", | |
ca364317 BF |
2381 | (int)cstate->current_fh.fh_dentry->d_name.len, |
2382 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 LT |
2383 | |
2384 | nfs4_lock_state(); | |
2385 | /* check close_lru for replay */ | |
ca364317 BF |
2386 | if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
2387 | close->cl_seqid, | |
1da177e4 LT |
2388 | &close->cl_stateid, |
2389 | CHECK_FH | OPEN_STATE | CLOSE_STATE, | |
2390 | &close->cl_stateowner, &stp, NULL))) | |
2391 | goto out; | |
1da177e4 LT |
2392 | status = nfs_ok; |
2393 | update_stateid(&stp->st_stateid); | |
2394 | memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2395 | ||
04ef5954 BF |
2396 | /* release_stateid() calls nfsd_close() if needed */ |
2397 | release_stateid(stp, OPEN_STATE); | |
2398 | ||
2399 | /* place unused nfs4_stateowners on so_close_lru list to be | |
2400 | * released by the laundromat service after the lease period | |
2401 | * to enable us to handle CLOSE replay | |
2402 | */ | |
2403 | if (list_empty(&close->cl_stateowner->so_stateids)) | |
2404 | move_to_close_lru(close->cl_stateowner); | |
1da177e4 | 2405 | out: |
f2327d9a | 2406 | if (close->cl_stateowner) { |
1da177e4 | 2407 | nfs4_get_stateowner(close->cl_stateowner); |
a4f1706a | 2408 | cstate->replay_owner = close->cl_stateowner; |
f2327d9a | 2409 | } |
1da177e4 LT |
2410 | nfs4_unlock_state(); |
2411 | return status; | |
2412 | } | |
2413 | ||
b37ad28b | 2414 | __be32 |
ca364317 BF |
2415 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2416 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 2417 | { |
b37ad28b | 2418 | __be32 status; |
1da177e4 | 2419 | |
ca364317 | 2420 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 LT |
2421 | goto out; |
2422 | ||
2423 | nfs4_lock_state(); | |
ca364317 BF |
2424 | status = nfs4_preprocess_stateid_op(&cstate->current_fh, |
2425 | &dr->dr_stateid, DELEG_RET, NULL); | |
1da177e4 LT |
2426 | nfs4_unlock_state(); |
2427 | out: | |
2428 | return status; | |
2429 | } | |
2430 | ||
2431 | ||
2432 | /* | |
2433 | * Lock owner state (byte-range locks) | |
2434 | */ | |
2435 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) | |
2436 | #define LOCK_HASH_BITS 8 | |
2437 | #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) | |
2438 | #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) | |
2439 | ||
2440 | #define lockownerid_hashval(id) \ | |
2441 | ((id) & LOCK_HASH_MASK) | |
2442 | ||
2443 | static inline unsigned int | |
2444 | lock_ownerstr_hashval(struct inode *inode, u32 cl_id, | |
2445 | struct xdr_netobj *ownername) | |
2446 | { | |
2447 | return (file_hashval(inode) + cl_id | |
2448 | + opaque_hashval(ownername->data, ownername->len)) | |
2449 | & LOCK_HASH_MASK; | |
2450 | } | |
2451 | ||
2452 | static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; | |
2453 | static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; | |
2454 | static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; | |
2455 | ||
fd39ca9a | 2456 | static struct nfs4_stateid * |
1da177e4 LT |
2457 | find_stateid(stateid_t *stid, int flags) |
2458 | { | |
2459 | struct nfs4_stateid *local = NULL; | |
2460 | u32 st_id = stid->si_stateownerid; | |
2461 | u32 f_id = stid->si_fileid; | |
2462 | unsigned int hashval; | |
2463 | ||
2464 | dprintk("NFSD: find_stateid flags 0x%x\n",flags); | |
2465 | if ((flags & LOCK_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) { | |
2466 | hashval = stateid_hashval(st_id, f_id); | |
2467 | list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { | |
2468 | if ((local->st_stateid.si_stateownerid == st_id) && | |
2469 | (local->st_stateid.si_fileid == f_id)) | |
2470 | return local; | |
2471 | } | |
2472 | } | |
2473 | if ((flags & OPEN_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) { | |
2474 | hashval = stateid_hashval(st_id, f_id); | |
2475 | list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { | |
2476 | if ((local->st_stateid.si_stateownerid == st_id) && | |
2477 | (local->st_stateid.si_fileid == f_id)) | |
2478 | return local; | |
2479 | } | |
849823c5 | 2480 | } |
1da177e4 LT |
2481 | return NULL; |
2482 | } | |
2483 | ||
2484 | static struct nfs4_delegation * | |
2485 | find_delegation_stateid(struct inode *ino, stateid_t *stid) | |
2486 | { | |
13cd2184 N |
2487 | struct nfs4_file *fp; |
2488 | struct nfs4_delegation *dl; | |
1da177e4 LT |
2489 | |
2490 | dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n", | |
2491 | stid->si_boot, stid->si_stateownerid, | |
2492 | stid->si_fileid, stid->si_generation); | |
2493 | ||
1da177e4 | 2494 | fp = find_file(ino); |
13cd2184 N |
2495 | if (!fp) |
2496 | return NULL; | |
2497 | dl = find_delegation_file(fp, stid); | |
2498 | put_nfs4_file(fp); | |
2499 | return dl; | |
1da177e4 LT |
2500 | } |
2501 | ||
2502 | /* | |
2503 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
2504 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
2505 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
2506 | * locking, this prevents us from being completely protocol-compliant. The | |
2507 | * real solution to this problem is to start using unsigned file offsets in | |
2508 | * the VFS, but this is a very deep change! | |
2509 | */ | |
2510 | static inline void | |
2511 | nfs4_transform_lock_offset(struct file_lock *lock) | |
2512 | { | |
2513 | if (lock->fl_start < 0) | |
2514 | lock->fl_start = OFFSET_MAX; | |
2515 | if (lock->fl_end < 0) | |
2516 | lock->fl_end = OFFSET_MAX; | |
2517 | } | |
2518 | ||
d5b9026a N |
2519 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
2520 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
e465a77f | 2521 | static struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 2522 | }; |
1da177e4 LT |
2523 | |
2524 | static inline void | |
2525 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
2526 | { | |
d5b9026a N |
2527 | struct nfs4_stateowner *sop; |
2528 | unsigned int hval; | |
1da177e4 | 2529 | |
d5b9026a N |
2530 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
2531 | sop = (struct nfs4_stateowner *) fl->fl_owner; | |
2532 | hval = lockownerid_hashval(sop->so_id); | |
1da177e4 LT |
2533 | kref_get(&sop->so_ref); |
2534 | deny->ld_sop = sop; | |
2535 | deny->ld_clientid = sop->so_client->cl_clientid; | |
d5b9026a N |
2536 | } else { |
2537 | deny->ld_sop = NULL; | |
2538 | deny->ld_clientid.cl_boot = 0; | |
2539 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
2540 | } |
2541 | deny->ld_start = fl->fl_start; | |
2542 | deny->ld_length = ~(u64)0; | |
2543 | if (fl->fl_end != ~(u64)0) | |
2544 | deny->ld_length = fl->fl_end - fl->fl_start + 1; | |
2545 | deny->ld_type = NFS4_READ_LT; | |
2546 | if (fl->fl_type != F_RDLCK) | |
2547 | deny->ld_type = NFS4_WRITE_LT; | |
2548 | } | |
2549 | ||
1da177e4 LT |
2550 | static struct nfs4_stateowner * |
2551 | find_lockstateowner_str(struct inode *inode, clientid_t *clid, | |
2552 | struct xdr_netobj *owner) | |
2553 | { | |
2554 | unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); | |
2555 | struct nfs4_stateowner *op; | |
2556 | ||
2557 | list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { | |
2558 | if (cmp_owner_str(op, owner, clid)) | |
2559 | return op; | |
2560 | } | |
2561 | return NULL; | |
2562 | } | |
2563 | ||
2564 | /* | |
2565 | * Alloc a lock owner structure. | |
2566 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
2567 | * occured. | |
2568 | * | |
2569 | * strhashval = lock_ownerstr_hashval | |
1da177e4 LT |
2570 | */ |
2571 | ||
2572 | static struct nfs4_stateowner * | |
2573 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { | |
2574 | struct nfs4_stateowner *sop; | |
2575 | struct nfs4_replay *rp; | |
2576 | unsigned int idhashval; | |
2577 | ||
2578 | if (!(sop = alloc_stateowner(&lock->lk_new_owner))) | |
2579 | return NULL; | |
2580 | idhashval = lockownerid_hashval(current_ownerid); | |
2581 | INIT_LIST_HEAD(&sop->so_idhash); | |
2582 | INIT_LIST_HEAD(&sop->so_strhash); | |
2583 | INIT_LIST_HEAD(&sop->so_perclient); | |
ea1da636 N |
2584 | INIT_LIST_HEAD(&sop->so_stateids); |
2585 | INIT_LIST_HEAD(&sop->so_perstateid); | |
1da177e4 LT |
2586 | INIT_LIST_HEAD(&sop->so_close_lru); /* not used */ |
2587 | sop->so_time = 0; | |
2588 | list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); | |
2589 | list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); | |
ea1da636 | 2590 | list_add(&sop->so_perstateid, &open_stp->st_lockowners); |
1da177e4 LT |
2591 | sop->so_is_open_owner = 0; |
2592 | sop->so_id = current_ownerid++; | |
2593 | sop->so_client = clp; | |
b59e3c0e NB |
2594 | /* It is the openowner seqid that will be incremented in encode in the |
2595 | * case of new lockowners; so increment the lock seqid manually: */ | |
2596 | sop->so_seqid = lock->lk_new_lock_seqid + 1; | |
1da177e4 LT |
2597 | sop->so_confirmed = 1; |
2598 | rp = &sop->so_replay; | |
de1ae286 | 2599 | rp->rp_status = nfserr_serverfault; |
1da177e4 LT |
2600 | rp->rp_buflen = 0; |
2601 | rp->rp_buf = rp->rp_ibuf; | |
2602 | return sop; | |
2603 | } | |
2604 | ||
fd39ca9a | 2605 | static struct nfs4_stateid * |
1da177e4 LT |
2606 | alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) |
2607 | { | |
2608 | struct nfs4_stateid *stp; | |
2609 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); | |
2610 | ||
5ac049ac N |
2611 | stp = nfs4_alloc_stateid(); |
2612 | if (stp == NULL) | |
1da177e4 LT |
2613 | goto out; |
2614 | INIT_LIST_HEAD(&stp->st_hash); | |
2615 | INIT_LIST_HEAD(&stp->st_perfile); | |
ea1da636 N |
2616 | INIT_LIST_HEAD(&stp->st_perstateowner); |
2617 | INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ | |
1da177e4 | 2618 | list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); |
8beefa24 | 2619 | list_add(&stp->st_perfile, &fp->fi_stateids); |
ea1da636 | 2620 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
1da177e4 | 2621 | stp->st_stateowner = sop; |
13cd2184 | 2622 | get_nfs4_file(fp); |
1da177e4 LT |
2623 | stp->st_file = fp; |
2624 | stp->st_stateid.si_boot = boot_time; | |
2625 | stp->st_stateid.si_stateownerid = sop->so_id; | |
2626 | stp->st_stateid.si_fileid = fp->fi_id; | |
2627 | stp->st_stateid.si_generation = 0; | |
2628 | stp->st_vfs_file = open_stp->st_vfs_file; /* FIXME refcount?? */ | |
2629 | stp->st_access_bmap = open_stp->st_access_bmap; | |
2630 | stp->st_deny_bmap = open_stp->st_deny_bmap; | |
4c4cd222 | 2631 | stp->st_openstp = open_stp; |
1da177e4 LT |
2632 | |
2633 | out: | |
2634 | return stp; | |
2635 | } | |
2636 | ||
fd39ca9a | 2637 | static int |
1da177e4 LT |
2638 | check_lock_length(u64 offset, u64 length) |
2639 | { | |
2640 | return ((length == 0) || ((length != ~(u64)0) && | |
2641 | LOFF_OVERFLOW(offset, length))); | |
2642 | } | |
2643 | ||
2644 | /* | |
2645 | * LOCK operation | |
2646 | */ | |
b37ad28b | 2647 | __be32 |
ca364317 | 2648 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 2649 | struct nfsd4_lock *lock) |
1da177e4 | 2650 | { |
3e9e3dbe | 2651 | struct nfs4_stateowner *open_sop = NULL; |
b59e3c0e | 2652 | struct nfs4_stateowner *lock_sop = NULL; |
1da177e4 LT |
2653 | struct nfs4_stateid *lock_stp; |
2654 | struct file *filp; | |
2655 | struct file_lock file_lock; | |
8dc7c311 | 2656 | struct file_lock conflock; |
b37ad28b | 2657 | __be32 status = 0; |
1da177e4 | 2658 | unsigned int strhashval; |
150b3934 | 2659 | unsigned int cmd; |
b8dd7b9a | 2660 | int err; |
1da177e4 LT |
2661 | |
2662 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
2663 | (long long) lock->lk_offset, | |
2664 | (long long) lock->lk_length); | |
2665 | ||
1da177e4 LT |
2666 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
2667 | return nfserr_inval; | |
2668 | ||
ca364317 BF |
2669 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
2670 | S_IFREG, MAY_LOCK))) { | |
a6f6ef2f AA |
2671 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
2672 | return status; | |
2673 | } | |
2674 | ||
1da177e4 LT |
2675 | nfs4_lock_state(); |
2676 | ||
2677 | if (lock->lk_is_new) { | |
893f8770 N |
2678 | /* |
2679 | * Client indicates that this is a new lockowner. | |
2680 | * Use open owner and open stateid to create lock owner and | |
2681 | * lock stateid. | |
2682 | */ | |
1da177e4 LT |
2683 | struct nfs4_stateid *open_stp = NULL; |
2684 | struct nfs4_file *fp; | |
2685 | ||
2686 | status = nfserr_stale_clientid; | |
849823c5 | 2687 | if (STALE_CLIENTID(&lock->lk_new_clientid)) |
1da177e4 | 2688 | goto out; |
1da177e4 | 2689 | |
1da177e4 | 2690 | /* validate and update open stateid and open seqid */ |
ca364317 | 2691 | status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
1da177e4 LT |
2692 | lock->lk_new_open_seqid, |
2693 | &lock->lk_new_open_stateid, | |
2694 | CHECK_FH | OPEN_STATE, | |
3a65588a | 2695 | &lock->lk_replay_owner, &open_stp, |
b59e3c0e | 2696 | lock); |
37515177 | 2697 | if (status) |
1da177e4 | 2698 | goto out; |
3a65588a | 2699 | open_sop = lock->lk_replay_owner; |
1da177e4 LT |
2700 | /* create lockowner and lock stateid */ |
2701 | fp = open_stp->st_file; | |
2702 | strhashval = lock_ownerstr_hashval(fp->fi_inode, | |
2703 | open_sop->so_client->cl_clientid.cl_id, | |
2704 | &lock->v.new.owner); | |
3e9e3dbe N |
2705 | /* XXX: Do we need to check for duplicate stateowners on |
2706 | * the same file, or should they just be allowed (and | |
2707 | * create new stateids)? */ | |
1da177e4 | 2708 | status = nfserr_resource; |
b59e3c0e NB |
2709 | lock_sop = alloc_init_lock_stateowner(strhashval, |
2710 | open_sop->so_client, open_stp, lock); | |
2711 | if (lock_sop == NULL) | |
1da177e4 | 2712 | goto out; |
b59e3c0e | 2713 | lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); |
8a280510 | 2714 | if (lock_stp == NULL) |
1da177e4 | 2715 | goto out; |
1da177e4 LT |
2716 | } else { |
2717 | /* lock (lock owner + lock stateid) already exists */ | |
ca364317 | 2718 | status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
1da177e4 LT |
2719 | lock->lk_old_lock_seqid, |
2720 | &lock->lk_old_lock_stateid, | |
2721 | CHECK_FH | LOCK_STATE, | |
3a65588a | 2722 | &lock->lk_replay_owner, &lock_stp, lock); |
1da177e4 LT |
2723 | if (status) |
2724 | goto out; | |
3a65588a | 2725 | lock_sop = lock->lk_replay_owner; |
1da177e4 | 2726 | } |
3a65588a | 2727 | /* lock->lk_replay_owner and lock_stp have been created or found */ |
1da177e4 LT |
2728 | filp = lock_stp->st_vfs_file; |
2729 | ||
0dd395dc N |
2730 | status = nfserr_grace; |
2731 | if (nfs4_in_grace() && !lock->lk_reclaim) | |
2732 | goto out; | |
2733 | status = nfserr_no_grace; | |
2734 | if (!nfs4_in_grace() && lock->lk_reclaim) | |
2735 | goto out; | |
2736 | ||
1da177e4 LT |
2737 | locks_init_lock(&file_lock); |
2738 | switch (lock->lk_type) { | |
2739 | case NFS4_READ_LT: | |
2740 | case NFS4_READW_LT: | |
2741 | file_lock.fl_type = F_RDLCK; | |
150b3934 | 2742 | cmd = F_SETLK; |
1da177e4 LT |
2743 | break; |
2744 | case NFS4_WRITE_LT: | |
2745 | case NFS4_WRITEW_LT: | |
2746 | file_lock.fl_type = F_WRLCK; | |
150b3934 | 2747 | cmd = F_SETLK; |
1da177e4 LT |
2748 | break; |
2749 | default: | |
2750 | status = nfserr_inval; | |
2751 | goto out; | |
2752 | } | |
b59e3c0e | 2753 | file_lock.fl_owner = (fl_owner_t)lock_sop; |
1da177e4 LT |
2754 | file_lock.fl_pid = current->tgid; |
2755 | file_lock.fl_file = filp; | |
2756 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 2757 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
2758 | |
2759 | file_lock.fl_start = lock->lk_offset; | |
2760 | if ((lock->lk_length == ~(u64)0) || | |
2761 | LOFF_OVERFLOW(lock->lk_offset, lock->lk_length)) | |
2762 | file_lock.fl_end = ~(u64)0; | |
2763 | else | |
2764 | file_lock.fl_end = lock->lk_offset + lock->lk_length - 1; | |
2765 | nfs4_transform_lock_offset(&file_lock); | |
2766 | ||
2767 | /* | |
2768 | * Try to lock the file in the VFS. | |
2769 | * Note: locks.c uses the BKL to protect the inode's lock list. | |
2770 | */ | |
2771 | ||
eb76b3fd AA |
2772 | /* XXX?: Just to divert the locks_release_private at the start of |
2773 | * locks_copy_lock: */ | |
150b3934 | 2774 | locks_init_lock(&conflock); |
fd85b817 | 2775 | err = vfs_lock_file(filp, cmd, &file_lock, &conflock); |
b8dd7b9a | 2776 | switch (-err) { |
1da177e4 LT |
2777 | case 0: /* success! */ |
2778 | update_stateid(&lock_stp->st_stateid); | |
2779 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, | |
2780 | sizeof(stateid_t)); | |
b8dd7b9a | 2781 | status = 0; |
eb76b3fd AA |
2782 | break; |
2783 | case (EAGAIN): /* conflock holds conflicting lock */ | |
2784 | status = nfserr_denied; | |
2785 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
2786 | nfs4_set_lock_denied(&conflock, &lock->lk_denied); | |
2787 | break; | |
1da177e4 LT |
2788 | case (EDEADLK): |
2789 | status = nfserr_deadlock; | |
eb76b3fd | 2790 | break; |
1da177e4 | 2791 | default: |
fd85b817 | 2792 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
eb76b3fd AA |
2793 | status = nfserr_resource; |
2794 | break; | |
1da177e4 | 2795 | } |
1da177e4 | 2796 | out: |
8a280510 BF |
2797 | if (status && lock->lk_is_new && lock_sop) |
2798 | release_stateowner(lock_sop); | |
3a65588a BF |
2799 | if (lock->lk_replay_owner) { |
2800 | nfs4_get_stateowner(lock->lk_replay_owner); | |
a4f1706a | 2801 | cstate->replay_owner = lock->lk_replay_owner; |
f2327d9a | 2802 | } |
1da177e4 LT |
2803 | nfs4_unlock_state(); |
2804 | return status; | |
2805 | } | |
2806 | ||
2807 | /* | |
2808 | * LOCKT operation | |
2809 | */ | |
b37ad28b | 2810 | __be32 |
ca364317 BF |
2811 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2812 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
2813 | { |
2814 | struct inode *inode; | |
2815 | struct file file; | |
2816 | struct file_lock file_lock; | |
fd85b817 | 2817 | int error; |
b37ad28b | 2818 | __be32 status; |
1da177e4 LT |
2819 | |
2820 | if (nfs4_in_grace()) | |
2821 | return nfserr_grace; | |
2822 | ||
2823 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
2824 | return nfserr_inval; | |
2825 | ||
2826 | lockt->lt_stateowner = NULL; | |
2827 | nfs4_lock_state(); | |
2828 | ||
2829 | status = nfserr_stale_clientid; | |
849823c5 | 2830 | if (STALE_CLIENTID(&lockt->lt_clientid)) |
1da177e4 | 2831 | goto out; |
1da177e4 | 2832 | |
ca364317 | 2833 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) { |
849823c5 | 2834 | dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n"); |
1da177e4 LT |
2835 | if (status == nfserr_symlink) |
2836 | status = nfserr_inval; | |
2837 | goto out; | |
2838 | } | |
2839 | ||
ca364317 | 2840 | inode = cstate->current_fh.fh_dentry->d_inode; |
1da177e4 LT |
2841 | locks_init_lock(&file_lock); |
2842 | switch (lockt->lt_type) { | |
2843 | case NFS4_READ_LT: | |
2844 | case NFS4_READW_LT: | |
2845 | file_lock.fl_type = F_RDLCK; | |
2846 | break; | |
2847 | case NFS4_WRITE_LT: | |
2848 | case NFS4_WRITEW_LT: | |
2849 | file_lock.fl_type = F_WRLCK; | |
2850 | break; | |
2851 | default: | |
2852 | printk("NFSD: nfs4_lockt: bad lock type!\n"); | |
2853 | status = nfserr_inval; | |
2854 | goto out; | |
2855 | } | |
2856 | ||
2857 | lockt->lt_stateowner = find_lockstateowner_str(inode, | |
2858 | &lockt->lt_clientid, &lockt->lt_owner); | |
2859 | if (lockt->lt_stateowner) | |
2860 | file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; | |
2861 | file_lock.fl_pid = current->tgid; | |
2862 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 2863 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
2864 | |
2865 | file_lock.fl_start = lockt->lt_offset; | |
2866 | if ((lockt->lt_length == ~(u64)0) || LOFF_OVERFLOW(lockt->lt_offset, lockt->lt_length)) | |
2867 | file_lock.fl_end = ~(u64)0; | |
2868 | else | |
2869 | file_lock.fl_end = lockt->lt_offset + lockt->lt_length - 1; | |
2870 | ||
2871 | nfs4_transform_lock_offset(&file_lock); | |
2872 | ||
fd85b817 | 2873 | /* vfs_test_lock uses the struct file _only_ to resolve the inode. |
1da177e4 | 2874 | * since LOCKT doesn't require an OPEN, and therefore a struct |
fd85b817 | 2875 | * file may not exist, pass vfs_test_lock a struct file with |
1da177e4 LT |
2876 | * only the dentry:inode set. |
2877 | */ | |
2878 | memset(&file, 0, sizeof (struct file)); | |
ca364317 | 2879 | file.f_path.dentry = cstate->current_fh.fh_dentry; |
1da177e4 LT |
2880 | |
2881 | status = nfs_ok; | |
fd85b817 ME |
2882 | error = vfs_test_lock(&file, &file_lock); |
2883 | if (error) { | |
2884 | status = nfserrno(error); | |
2885 | goto out; | |
2886 | } | |
9d6a8c5c | 2887 | if (file_lock.fl_type != F_UNLCK) { |
1da177e4 | 2888 | status = nfserr_denied; |
9d6a8c5c | 2889 | nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); |
1da177e4 LT |
2890 | } |
2891 | out: | |
2892 | nfs4_unlock_state(); | |
2893 | return status; | |
2894 | } | |
2895 | ||
b37ad28b | 2896 | __be32 |
ca364317 | 2897 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 2898 | struct nfsd4_locku *locku) |
1da177e4 LT |
2899 | { |
2900 | struct nfs4_stateid *stp; | |
2901 | struct file *filp = NULL; | |
2902 | struct file_lock file_lock; | |
b37ad28b | 2903 | __be32 status; |
b8dd7b9a | 2904 | int err; |
1da177e4 LT |
2905 | |
2906 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", | |
2907 | (long long) locku->lu_offset, | |
2908 | (long long) locku->lu_length); | |
2909 | ||
2910 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
2911 | return nfserr_inval; | |
2912 | ||
2913 | nfs4_lock_state(); | |
2914 | ||
ca364317 | 2915 | if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
1da177e4 LT |
2916 | locku->lu_seqid, |
2917 | &locku->lu_stateid, | |
2918 | CHECK_FH | LOCK_STATE, | |
2919 | &locku->lu_stateowner, &stp, NULL))) | |
2920 | goto out; | |
2921 | ||
2922 | filp = stp->st_vfs_file; | |
2923 | BUG_ON(!filp); | |
2924 | locks_init_lock(&file_lock); | |
2925 | file_lock.fl_type = F_UNLCK; | |
2926 | file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; | |
2927 | file_lock.fl_pid = current->tgid; | |
2928 | file_lock.fl_file = filp; | |
2929 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 2930 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
2931 | file_lock.fl_start = locku->lu_offset; |
2932 | ||
2933 | if ((locku->lu_length == ~(u64)0) || LOFF_OVERFLOW(locku->lu_offset, locku->lu_length)) | |
2934 | file_lock.fl_end = ~(u64)0; | |
2935 | else | |
2936 | file_lock.fl_end = locku->lu_offset + locku->lu_length - 1; | |
2937 | nfs4_transform_lock_offset(&file_lock); | |
2938 | ||
2939 | /* | |
2940 | * Try to unlock the file in the VFS. | |
2941 | */ | |
fd85b817 | 2942 | err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); |
b8dd7b9a | 2943 | if (err) { |
fd85b817 | 2944 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
2945 | goto out_nfserr; |
2946 | } | |
2947 | /* | |
2948 | * OK, unlock succeeded; the only thing left to do is update the stateid. | |
2949 | */ | |
2950 | update_stateid(&stp->st_stateid); | |
2951 | memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2952 | ||
2953 | out: | |
f2327d9a | 2954 | if (locku->lu_stateowner) { |
1da177e4 | 2955 | nfs4_get_stateowner(locku->lu_stateowner); |
a4f1706a | 2956 | cstate->replay_owner = locku->lu_stateowner; |
f2327d9a | 2957 | } |
1da177e4 LT |
2958 | nfs4_unlock_state(); |
2959 | return status; | |
2960 | ||
2961 | out_nfserr: | |
b8dd7b9a | 2962 | status = nfserrno(err); |
1da177e4 LT |
2963 | goto out; |
2964 | } | |
2965 | ||
2966 | /* | |
2967 | * returns | |
2968 | * 1: locks held by lockowner | |
2969 | * 0: no locks held by lockowner | |
2970 | */ | |
2971 | static int | |
2972 | check_for_locks(struct file *filp, struct nfs4_stateowner *lowner) | |
2973 | { | |
2974 | struct file_lock **flpp; | |
7eaa36e2 | 2975 | struct inode *inode = filp->f_path.dentry->d_inode; |
1da177e4 LT |
2976 | int status = 0; |
2977 | ||
2978 | lock_kernel(); | |
2979 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { | |
796dadfd | 2980 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
2981 | status = 1; |
2982 | goto out; | |
796dadfd | 2983 | } |
1da177e4 LT |
2984 | } |
2985 | out: | |
2986 | unlock_kernel(); | |
2987 | return status; | |
2988 | } | |
2989 | ||
b37ad28b | 2990 | __be32 |
b591480b BF |
2991 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
2992 | struct nfsd4_compound_state *cstate, | |
2993 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
2994 | { |
2995 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe N |
2996 | struct nfs4_stateowner *sop; |
2997 | struct nfs4_stateid *stp; | |
1da177e4 | 2998 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe N |
2999 | struct list_head matches; |
3000 | int i; | |
b37ad28b | 3001 | __be32 status; |
1da177e4 LT |
3002 | |
3003 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
3004 | clid->cl_boot, clid->cl_id); | |
3005 | ||
3006 | /* XXX check for lease expiration */ | |
3007 | ||
3008 | status = nfserr_stale_clientid; | |
849823c5 | 3009 | if (STALE_CLIENTID(clid)) |
1da177e4 | 3010 | return status; |
1da177e4 LT |
3011 | |
3012 | nfs4_lock_state(); | |
3013 | ||
3e9e3dbe N |
3014 | status = nfserr_locks_held; |
3015 | /* XXX: we're doing a linear search through all the lockowners. | |
3016 | * Yipes! For now we'll just hope clients aren't really using | |
3017 | * release_lockowner much, but eventually we have to fix these | |
3018 | * data structures. */ | |
3019 | INIT_LIST_HEAD(&matches); | |
3020 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
3021 | list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { | |
3022 | if (!cmp_owner_str(sop, owner, clid)) | |
3023 | continue; | |
3024 | list_for_each_entry(stp, &sop->so_stateids, | |
3025 | st_perstateowner) { | |
3026 | if (check_for_locks(stp->st_vfs_file, sop)) | |
3027 | goto out; | |
3028 | /* Note: so_perclient unused for lockowners, | |
3029 | * so it's OK to fool with here. */ | |
3030 | list_add(&sop->so_perclient, &matches); | |
3031 | } | |
1da177e4 | 3032 | } |
3e9e3dbe N |
3033 | } |
3034 | /* Clients probably won't expect us to return with some (but not all) | |
3035 | * of the lockowner state released; so don't release any until all | |
3036 | * have been checked. */ | |
3037 | status = nfs_ok; | |
0fa822e4 N |
3038 | while (!list_empty(&matches)) { |
3039 | sop = list_entry(matches.next, struct nfs4_stateowner, | |
3040 | so_perclient); | |
3041 | /* unhash_stateowner deletes so_perclient only | |
3042 | * for openowners. */ | |
3043 | list_del(&sop->so_perclient); | |
3e9e3dbe | 3044 | release_stateowner(sop); |
1da177e4 LT |
3045 | } |
3046 | out: | |
3047 | nfs4_unlock_state(); | |
3048 | return status; | |
3049 | } | |
3050 | ||
3051 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 3052 | alloc_reclaim(void) |
1da177e4 | 3053 | { |
a55370a3 | 3054 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
3055 | } |
3056 | ||
c7b9a459 N |
3057 | int |
3058 | nfs4_has_reclaimed_state(const char *name) | |
3059 | { | |
3060 | unsigned int strhashval = clientstr_hashval(name); | |
3061 | struct nfs4_client *clp; | |
3062 | ||
3063 | clp = find_confirmed_client_by_str(name, strhashval); | |
3064 | return clp ? 1 : 0; | |
3065 | } | |
3066 | ||
1da177e4 LT |
3067 | /* |
3068 | * failure => all reset bets are off, nfserr_no_grace... | |
3069 | */ | |
190e4fbf N |
3070 | int |
3071 | nfs4_client_to_reclaim(const char *name) | |
1da177e4 LT |
3072 | { |
3073 | unsigned int strhashval; | |
3074 | struct nfs4_client_reclaim *crp = NULL; | |
3075 | ||
a55370a3 N |
3076 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
3077 | crp = alloc_reclaim(); | |
1da177e4 LT |
3078 | if (!crp) |
3079 | return 0; | |
a55370a3 | 3080 | strhashval = clientstr_hashval(name); |
1da177e4 LT |
3081 | INIT_LIST_HEAD(&crp->cr_strhash); |
3082 | list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); | |
a55370a3 | 3083 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
1da177e4 LT |
3084 | reclaim_str_hashtbl_size++; |
3085 | return 1; | |
3086 | } | |
3087 | ||
3088 | static void | |
3089 | nfs4_release_reclaim(void) | |
3090 | { | |
3091 | struct nfs4_client_reclaim *crp = NULL; | |
3092 | int i; | |
3093 | ||
1da177e4 LT |
3094 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
3095 | while (!list_empty(&reclaim_str_hashtbl[i])) { | |
3096 | crp = list_entry(reclaim_str_hashtbl[i].next, | |
3097 | struct nfs4_client_reclaim, cr_strhash); | |
3098 | list_del(&crp->cr_strhash); | |
1da177e4 LT |
3099 | kfree(crp); |
3100 | reclaim_str_hashtbl_size--; | |
3101 | } | |
3102 | } | |
3103 | BUG_ON(reclaim_str_hashtbl_size); | |
3104 | } | |
3105 | ||
3106 | /* | |
3107 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
fd39ca9a | 3108 | static struct nfs4_client_reclaim * |
1da177e4 LT |
3109 | nfs4_find_reclaim_client(clientid_t *clid) |
3110 | { | |
3111 | unsigned int strhashval; | |
3112 | struct nfs4_client *clp; | |
3113 | struct nfs4_client_reclaim *crp = NULL; | |
3114 | ||
3115 | ||
3116 | /* find clientid in conf_id_hashtbl */ | |
3117 | clp = find_confirmed_client(clid); | |
3118 | if (clp == NULL) | |
3119 | return NULL; | |
3120 | ||
a55370a3 N |
3121 | dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", |
3122 | clp->cl_name.len, clp->cl_name.data, | |
3123 | clp->cl_recdir); | |
1da177e4 LT |
3124 | |
3125 | /* find clp->cl_name in reclaim_str_hashtbl */ | |
a55370a3 | 3126 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 | 3127 | list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { |
a55370a3 | 3128 | if (same_name(crp->cr_recdir, clp->cl_recdir)) { |
1da177e4 LT |
3129 | return crp; |
3130 | } | |
3131 | } | |
3132 | return NULL; | |
3133 | } | |
3134 | ||
3135 | /* | |
3136 | * Called from OPEN. Look for clientid in reclaim list. | |
3137 | */ | |
b37ad28b | 3138 | __be32 |
1da177e4 LT |
3139 | nfs4_check_open_reclaim(clientid_t *clid) |
3140 | { | |
dfc83565 | 3141 | return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; |
1da177e4 LT |
3142 | } |
3143 | ||
ac4d8ff2 | 3144 | /* initialization to perform at module load time: */ |
1da177e4 | 3145 | |
ac4d8ff2 N |
3146 | void |
3147 | nfs4_state_init(void) | |
1da177e4 LT |
3148 | { |
3149 | int i; | |
1da177e4 | 3150 | |
1da177e4 LT |
3151 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
3152 | INIT_LIST_HEAD(&conf_id_hashtbl[i]); | |
3153 | INIT_LIST_HEAD(&conf_str_hashtbl[i]); | |
3154 | INIT_LIST_HEAD(&unconf_str_hashtbl[i]); | |
3155 | INIT_LIST_HEAD(&unconf_id_hashtbl[i]); | |
3156 | } | |
3157 | for (i = 0; i < FILE_HASH_SIZE; i++) { | |
3158 | INIT_LIST_HEAD(&file_hashtbl[i]); | |
3159 | } | |
3160 | for (i = 0; i < OWNER_HASH_SIZE; i++) { | |
3161 | INIT_LIST_HEAD(&ownerstr_hashtbl[i]); | |
3162 | INIT_LIST_HEAD(&ownerid_hashtbl[i]); | |
3163 | } | |
3164 | for (i = 0; i < STATEID_HASH_SIZE; i++) { | |
3165 | INIT_LIST_HEAD(&stateid_hashtbl[i]); | |
3166 | INIT_LIST_HEAD(&lockstateid_hashtbl[i]); | |
3167 | } | |
3168 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
3169 | INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); | |
3170 | INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); | |
3171 | } | |
1da177e4 | 3172 | memset(&onestateid, ~0, sizeof(stateid_t)); |
1da177e4 LT |
3173 | INIT_LIST_HEAD(&close_lru); |
3174 | INIT_LIST_HEAD(&client_lru); | |
3175 | INIT_LIST_HEAD(&del_recall_lru); | |
ac4d8ff2 N |
3176 | for (i = 0; i < CLIENT_HASH_SIZE; i++) |
3177 | INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); | |
3178 | reclaim_str_hashtbl_size = 0; | |
ac4d8ff2 N |
3179 | } |
3180 | ||
190e4fbf N |
3181 | static void |
3182 | nfsd4_load_reboot_recovery_data(void) | |
3183 | { | |
3184 | int status; | |
3185 | ||
0964a3d3 N |
3186 | nfs4_lock_state(); |
3187 | nfsd4_init_recdir(user_recovery_dirname); | |
190e4fbf | 3188 | status = nfsd4_recdir_load(); |
0964a3d3 | 3189 | nfs4_unlock_state(); |
190e4fbf N |
3190 | if (status) |
3191 | printk("NFSD: Failure reading reboot recovery data\n"); | |
3192 | } | |
3193 | ||
ac4d8ff2 N |
3194 | /* initialization to perform when the nfsd service is started: */ |
3195 | ||
3196 | static void | |
3197 | __nfs4_state_start(void) | |
3198 | { | |
3199 | time_t grace_time; | |
3200 | ||
1da177e4 | 3201 | boot_time = get_seconds(); |
d99a05ad N |
3202 | grace_time = max(user_lease_time, lease_time); |
3203 | lease_time = user_lease_time; | |
a76b4319 | 3204 | in_grace = 1; |
d99a05ad | 3205 | printk("NFSD: starting %ld-second grace period\n", grace_time); |
58da282b | 3206 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
a76b4319 | 3207 | queue_delayed_work(laundry_wq, &laundromat_work, grace_time*HZ); |
1da177e4 LT |
3208 | } |
3209 | ||
3210 | int | |
76a3550e | 3211 | nfs4_state_start(void) |
1da177e4 LT |
3212 | { |
3213 | int status; | |
3214 | ||
3215 | if (nfs4_init) | |
3216 | return 0; | |
3217 | status = nfsd4_init_slabs(); | |
3218 | if (status) | |
3219 | return status; | |
190e4fbf | 3220 | nfsd4_load_reboot_recovery_data(); |
76a3550e | 3221 | __nfs4_state_start(); |
1da177e4 LT |
3222 | nfs4_init = 1; |
3223 | return 0; | |
3224 | } | |
3225 | ||
3226 | int | |
3227 | nfs4_in_grace(void) | |
3228 | { | |
a76b4319 | 3229 | return in_grace; |
1da177e4 LT |
3230 | } |
3231 | ||
3232 | time_t | |
3233 | nfs4_lease_time(void) | |
3234 | { | |
3235 | return lease_time; | |
3236 | } | |
3237 | ||
3238 | static void | |
3239 | __nfs4_state_shutdown(void) | |
3240 | { | |
3241 | int i; | |
3242 | struct nfs4_client *clp = NULL; | |
3243 | struct nfs4_delegation *dp = NULL; | |
1da177e4 LT |
3244 | struct list_head *pos, *next, reaplist; |
3245 | ||
1da177e4 LT |
3246 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
3247 | while (!list_empty(&conf_id_hashtbl[i])) { | |
3248 | clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
3249 | expire_client(clp); | |
3250 | } | |
3251 | while (!list_empty(&unconf_str_hashtbl[i])) { | |
3252 | clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); | |
3253 | expire_client(clp); | |
3254 | } | |
3255 | } | |
3256 | INIT_LIST_HEAD(&reaplist); | |
3257 | spin_lock(&recall_lock); | |
3258 | list_for_each_safe(pos, next, &del_recall_lru) { | |
3259 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3260 | list_move(&dp->dl_recall_lru, &reaplist); | |
3261 | } | |
3262 | spin_unlock(&recall_lock); | |
3263 | list_for_each_safe(pos, next, &reaplist) { | |
3264 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3265 | list_del_init(&dp->dl_recall_lru); | |
3266 | unhash_delegation(dp); | |
3267 | } | |
3268 | ||
190e4fbf | 3269 | nfsd4_shutdown_recdir(); |
1da177e4 | 3270 | nfs4_init = 0; |
1da177e4 LT |
3271 | } |
3272 | ||
3273 | void | |
3274 | nfs4_state_shutdown(void) | |
3275 | { | |
5e8d5c29 N |
3276 | cancel_rearming_delayed_workqueue(laundry_wq, &laundromat_work); |
3277 | destroy_workqueue(laundry_wq); | |
1da177e4 LT |
3278 | nfs4_lock_state(); |
3279 | nfs4_release_reclaim(); | |
3280 | __nfs4_state_shutdown(); | |
3281 | nfsd4_free_slabs(); | |
3282 | nfs4_unlock_state(); | |
3283 | } | |
3284 | ||
0964a3d3 N |
3285 | static void |
3286 | nfs4_set_recdir(char *recdir) | |
3287 | { | |
3288 | nfs4_lock_state(); | |
3289 | strcpy(user_recovery_dirname, recdir); | |
3290 | nfs4_unlock_state(); | |
3291 | } | |
3292 | ||
3293 | /* | |
3294 | * Change the NFSv4 recovery directory to recdir. | |
3295 | */ | |
3296 | int | |
3297 | nfs4_reset_recoverydir(char *recdir) | |
3298 | { | |
3299 | int status; | |
3300 | struct nameidata nd; | |
3301 | ||
3302 | status = path_lookup(recdir, LOOKUP_FOLLOW, &nd); | |
3303 | if (status) | |
3304 | return status; | |
3305 | status = -ENOTDIR; | |
3306 | if (S_ISDIR(nd.dentry->d_inode->i_mode)) { | |
3307 | nfs4_set_recdir(recdir); | |
3308 | status = 0; | |
3309 | } | |
3310 | path_release(&nd); | |
3311 | return status; | |
3312 | } | |
3313 | ||
1da177e4 LT |
3314 | /* |
3315 | * Called when leasetime is changed. | |
3316 | * | |
d99a05ad N |
3317 | * The only way the protocol gives us to handle on-the-fly lease changes is to |
3318 | * simulate a reboot. Instead of doing that, we just wait till the next time | |
3319 | * we start to register any changes in lease time. If the administrator | |
3320 | * really wants to change the lease time *now*, they can go ahead and bring | |
3321 | * nfsd down and then back up again after changing the lease time. | |
1da177e4 LT |
3322 | */ |
3323 | void | |
3324 | nfs4_reset_lease(time_t leasetime) | |
3325 | { | |
d99a05ad N |
3326 | lock_kernel(); |
3327 | user_lease_time = leasetime; | |
3328 | unlock_kernel(); | |
1da177e4 | 3329 | } |