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> |
c2f1a551 | 52 | #include <linux/swap.h> |
353ab6e9 | 53 | #include <linux/mutex.h> |
fd85b817 | 54 | #include <linux/lockd/bind.h> |
9a8db97e | 55 | #include <linux/module.h> |
1da177e4 LT |
56 | |
57 | #define NFSDDBG_FACILITY NFSDDBG_PROC | |
58 | ||
59 | /* Globals */ | |
60 | static time_t lease_time = 90; /* default lease time */ | |
d99a05ad | 61 | static time_t user_lease_time = 90; |
fd39ca9a | 62 | static time_t boot_time; |
a76b4319 | 63 | static int in_grace = 1; |
1da177e4 LT |
64 | static u32 current_clientid = 1; |
65 | static u32 current_ownerid = 1; | |
66 | static u32 current_fileid = 1; | |
67 | static u32 current_delegid = 1; | |
68 | static u32 nfs4_init; | |
fd39ca9a N |
69 | static stateid_t zerostateid; /* bits all 0 */ |
70 | static stateid_t onestateid; /* bits all 1 */ | |
71 | ||
72 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t))) | |
73 | #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t))) | |
1da177e4 | 74 | |
1da177e4 | 75 | /* forward declarations */ |
fd39ca9a | 76 | static struct nfs4_stateid * find_stateid(stateid_t *stid, int flags); |
1da177e4 LT |
77 | static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid); |
78 | static void release_stateid_lockowners(struct nfs4_stateid *open_stp); | |
0964a3d3 N |
79 | static char user_recovery_dirname[PATH_MAX] = "/var/lib/nfs/v4recovery"; |
80 | static void nfs4_set_recdir(char *recdir); | |
1da177e4 LT |
81 | |
82 | /* Locking: | |
83 | * | |
353ab6e9 | 84 | * client_mutex: |
1da177e4 LT |
85 | * protects clientid_hashtbl[], clientstr_hashtbl[], |
86 | * unconfstr_hashtbl[], uncofid_hashtbl[]. | |
87 | */ | |
353ab6e9 | 88 | static DEFINE_MUTEX(client_mutex); |
1da177e4 | 89 | |
e18b890b CL |
90 | static struct kmem_cache *stateowner_slab = NULL; |
91 | static struct kmem_cache *file_slab = NULL; | |
92 | static struct kmem_cache *stateid_slab = NULL; | |
93 | static struct kmem_cache *deleg_slab = NULL; | |
e60d4398 | 94 | |
1da177e4 LT |
95 | void |
96 | nfs4_lock_state(void) | |
97 | { | |
353ab6e9 | 98 | mutex_lock(&client_mutex); |
1da177e4 LT |
99 | } |
100 | ||
101 | void | |
102 | nfs4_unlock_state(void) | |
103 | { | |
353ab6e9 | 104 | mutex_unlock(&client_mutex); |
1da177e4 LT |
105 | } |
106 | ||
107 | static inline u32 | |
108 | opaque_hashval(const void *ptr, int nbytes) | |
109 | { | |
110 | unsigned char *cptr = (unsigned char *) ptr; | |
111 | ||
112 | u32 x = 0; | |
113 | while (nbytes--) { | |
114 | x *= 37; | |
115 | x += *cptr++; | |
116 | } | |
117 | return x; | |
118 | } | |
119 | ||
120 | /* forward declarations */ | |
121 | static void release_stateowner(struct nfs4_stateowner *sop); | |
122 | static void release_stateid(struct nfs4_stateid *stp, int flags); | |
1da177e4 LT |
123 | |
124 | /* | |
125 | * Delegation state | |
126 | */ | |
127 | ||
128 | /* recall_lock protects the del_recall_lru */ | |
34af946a | 129 | static DEFINE_SPINLOCK(recall_lock); |
1da177e4 LT |
130 | static struct list_head del_recall_lru; |
131 | ||
13cd2184 N |
132 | static void |
133 | free_nfs4_file(struct kref *kref) | |
134 | { | |
135 | struct nfs4_file *fp = container_of(kref, struct nfs4_file, fi_ref); | |
136 | list_del(&fp->fi_hash); | |
137 | iput(fp->fi_inode); | |
138 | kmem_cache_free(file_slab, fp); | |
139 | } | |
140 | ||
141 | static inline void | |
142 | put_nfs4_file(struct nfs4_file *fi) | |
143 | { | |
144 | kref_put(&fi->fi_ref, free_nfs4_file); | |
145 | } | |
146 | ||
147 | static inline void | |
148 | get_nfs4_file(struct nfs4_file *fi) | |
149 | { | |
150 | kref_get(&fi->fi_ref); | |
151 | } | |
152 | ||
ef0f3390 | 153 | static int num_delegations; |
c2f1a551 | 154 | unsigned int max_delegations; |
ef0f3390 N |
155 | |
156 | /* | |
157 | * Open owner state (share locks) | |
158 | */ | |
159 | ||
160 | /* hash tables for nfs4_stateowner */ | |
161 | #define OWNER_HASH_BITS 8 | |
162 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
163 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
164 | ||
165 | #define ownerid_hashval(id) \ | |
166 | ((id) & OWNER_HASH_MASK) | |
167 | #define ownerstr_hashval(clientid, ownername) \ | |
168 | (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK) | |
169 | ||
170 | static struct list_head ownerid_hashtbl[OWNER_HASH_SIZE]; | |
171 | static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; | |
172 | ||
173 | /* hash table for nfs4_file */ | |
174 | #define FILE_HASH_BITS 8 | |
175 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
176 | #define FILE_HASH_MASK (FILE_HASH_SIZE - 1) | |
177 | /* hash table for (open)nfs4_stateid */ | |
178 | #define STATEID_HASH_BITS 10 | |
179 | #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS) | |
180 | #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1) | |
181 | ||
182 | #define file_hashval(x) \ | |
183 | hash_ptr(x, FILE_HASH_BITS) | |
184 | #define stateid_hashval(owner_id, file_id) \ | |
185 | (((owner_id) + (file_id)) & STATEID_HASH_MASK) | |
186 | ||
187 | static struct list_head file_hashtbl[FILE_HASH_SIZE]; | |
188 | static struct list_head stateid_hashtbl[STATEID_HASH_SIZE]; | |
189 | ||
1da177e4 LT |
190 | static struct nfs4_delegation * |
191 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type) | |
192 | { | |
193 | struct nfs4_delegation *dp; | |
194 | struct nfs4_file *fp = stp->st_file; | |
195 | struct nfs4_callback *cb = &stp->st_stateowner->so_client->cl_callback; | |
196 | ||
197 | dprintk("NFSD alloc_init_deleg\n"); | |
c2f1a551 | 198 | if (num_delegations > max_delegations) |
ef0f3390 | 199 | return NULL; |
5b2d21c1 N |
200 | dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); |
201 | if (dp == NULL) | |
1da177e4 | 202 | return dp; |
ef0f3390 | 203 | num_delegations++; |
ea1da636 N |
204 | INIT_LIST_HEAD(&dp->dl_perfile); |
205 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 LT |
206 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
207 | dp->dl_client = clp; | |
13cd2184 | 208 | get_nfs4_file(fp); |
1da177e4 LT |
209 | dp->dl_file = fp; |
210 | dp->dl_flock = NULL; | |
211 | get_file(stp->st_vfs_file); | |
212 | dp->dl_vfs_file = stp->st_vfs_file; | |
213 | dp->dl_type = type; | |
214 | dp->dl_recall.cbr_dp = NULL; | |
215 | dp->dl_recall.cbr_ident = cb->cb_ident; | |
216 | dp->dl_recall.cbr_trunc = 0; | |
217 | dp->dl_stateid.si_boot = boot_time; | |
218 | dp->dl_stateid.si_stateownerid = current_delegid++; | |
219 | dp->dl_stateid.si_fileid = 0; | |
220 | dp->dl_stateid.si_generation = 0; | |
221 | dp->dl_fhlen = current_fh->fh_handle.fh_size; | |
222 | memcpy(dp->dl_fhval, ¤t_fh->fh_handle.fh_base, | |
223 | current_fh->fh_handle.fh_size); | |
224 | dp->dl_time = 0; | |
225 | atomic_set(&dp->dl_count, 1); | |
ea1da636 N |
226 | list_add(&dp->dl_perfile, &fp->fi_delegations); |
227 | list_add(&dp->dl_perclnt, &clp->cl_delegations); | |
1da177e4 LT |
228 | return dp; |
229 | } | |
230 | ||
231 | void | |
232 | nfs4_put_delegation(struct nfs4_delegation *dp) | |
233 | { | |
234 | if (atomic_dec_and_test(&dp->dl_count)) { | |
235 | dprintk("NFSD: freeing dp %p\n",dp); | |
13cd2184 | 236 | put_nfs4_file(dp->dl_file); |
5b2d21c1 | 237 | kmem_cache_free(deleg_slab, dp); |
ef0f3390 | 238 | num_delegations--; |
1da177e4 LT |
239 | } |
240 | } | |
241 | ||
242 | /* Remove the associated file_lock first, then remove the delegation. | |
243 | * lease_modify() is called to remove the FS_LEASE file_lock from | |
244 | * the i_flock list, eventually calling nfsd's lock_manager | |
245 | * fl_release_callback. | |
246 | */ | |
247 | static void | |
248 | nfs4_close_delegation(struct nfs4_delegation *dp) | |
249 | { | |
250 | struct file *filp = dp->dl_vfs_file; | |
251 | ||
252 | dprintk("NFSD: close_delegation dp %p\n",dp); | |
253 | dp->dl_vfs_file = NULL; | |
254 | /* The following nfsd_close may not actually close the file, | |
255 | * but we want to remove the lease in any case. */ | |
c907132d N |
256 | if (dp->dl_flock) |
257 | setlease(filp, F_UNLCK, &dp->dl_flock); | |
1da177e4 | 258 | nfsd_close(filp); |
1da177e4 LT |
259 | } |
260 | ||
261 | /* Called under the state lock. */ | |
262 | static void | |
263 | unhash_delegation(struct nfs4_delegation *dp) | |
264 | { | |
ea1da636 N |
265 | list_del_init(&dp->dl_perfile); |
266 | list_del_init(&dp->dl_perclnt); | |
1da177e4 LT |
267 | spin_lock(&recall_lock); |
268 | list_del_init(&dp->dl_recall_lru); | |
269 | spin_unlock(&recall_lock); | |
270 | nfs4_close_delegation(dp); | |
271 | nfs4_put_delegation(dp); | |
272 | } | |
273 | ||
274 | /* | |
275 | * SETCLIENTID state | |
276 | */ | |
277 | ||
278 | /* Hash tables for nfs4_clientid state */ | |
279 | #define CLIENT_HASH_BITS 4 | |
280 | #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) | |
281 | #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) | |
282 | ||
283 | #define clientid_hashval(id) \ | |
284 | ((id) & CLIENT_HASH_MASK) | |
a55370a3 N |
285 | #define clientstr_hashval(name) \ |
286 | (opaque_hashval((name), 8) & CLIENT_HASH_MASK) | |
1da177e4 LT |
287 | /* |
288 | * reclaim_str_hashtbl[] holds known client info from previous reset/reboot | |
289 | * used in reboot/reset lease grace period processing | |
290 | * | |
291 | * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed | |
292 | * setclientid_confirmed info. | |
293 | * | |
294 | * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed | |
295 | * setclientid info. | |
296 | * | |
297 | * client_lru holds client queue ordered by nfs4_client.cl_time | |
298 | * for lease renewal. | |
299 | * | |
300 | * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time | |
301 | * for last close replay. | |
302 | */ | |
303 | static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; | |
304 | static int reclaim_str_hashtbl_size = 0; | |
305 | static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; | |
306 | static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; | |
307 | static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; | |
308 | static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; | |
309 | static struct list_head client_lru; | |
310 | static struct list_head close_lru; | |
311 | ||
312 | static inline void | |
313 | renew_client(struct nfs4_client *clp) | |
314 | { | |
315 | /* | |
316 | * Move client to the end to the LRU list. | |
317 | */ | |
318 | dprintk("renewing client (clientid %08x/%08x)\n", | |
319 | clp->cl_clientid.cl_boot, | |
320 | clp->cl_clientid.cl_id); | |
321 | list_move_tail(&clp->cl_lru, &client_lru); | |
322 | clp->cl_time = get_seconds(); | |
323 | } | |
324 | ||
325 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ | |
326 | static int | |
327 | STALE_CLIENTID(clientid_t *clid) | |
328 | { | |
329 | if (clid->cl_boot == boot_time) | |
330 | return 0; | |
331 | dprintk("NFSD stale clientid (%08x/%08x)\n", | |
332 | clid->cl_boot, clid->cl_id); | |
333 | return 1; | |
334 | } | |
335 | ||
336 | /* | |
337 | * XXX Should we use a slab cache ? | |
338 | * This type of memory management is somewhat inefficient, but we use it | |
339 | * anyway since SETCLIENTID is not a common operation. | |
340 | */ | |
341 | static inline struct nfs4_client * | |
342 | alloc_client(struct xdr_netobj name) | |
343 | { | |
344 | struct nfs4_client *clp; | |
345 | ||
f8314dc6 | 346 | if ((clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL))!= NULL) { |
1da177e4 LT |
347 | if ((clp->cl_name.data = kmalloc(name.len, GFP_KERNEL)) != NULL) { |
348 | memcpy(clp->cl_name.data, name.data, name.len); | |
349 | clp->cl_name.len = name.len; | |
350 | } | |
351 | else { | |
352 | kfree(clp); | |
353 | clp = NULL; | |
354 | } | |
355 | } | |
356 | return clp; | |
357 | } | |
358 | ||
359 | static inline void | |
360 | free_client(struct nfs4_client *clp) | |
361 | { | |
362 | if (clp->cl_cred.cr_group_info) | |
363 | put_group_info(clp->cl_cred.cr_group_info); | |
364 | kfree(clp->cl_name.data); | |
365 | kfree(clp); | |
366 | } | |
367 | ||
368 | void | |
369 | put_nfs4_client(struct nfs4_client *clp) | |
370 | { | |
371 | if (atomic_dec_and_test(&clp->cl_count)) | |
372 | free_client(clp); | |
373 | } | |
374 | ||
4e2fd495 N |
375 | static void |
376 | shutdown_callback_client(struct nfs4_client *clp) | |
377 | { | |
378 | struct rpc_clnt *clnt = clp->cl_callback.cb_client; | |
379 | ||
380 | /* shutdown rpc client, ending any outstanding recall rpcs */ | |
381 | if (clnt) { | |
382 | clp->cl_callback.cb_client = NULL; | |
383 | rpc_shutdown_client(clnt); | |
4e2fd495 N |
384 | } |
385 | } | |
386 | ||
1da177e4 LT |
387 | static void |
388 | expire_client(struct nfs4_client *clp) | |
389 | { | |
390 | struct nfs4_stateowner *sop; | |
391 | struct nfs4_delegation *dp; | |
1da177e4 LT |
392 | struct list_head reaplist; |
393 | ||
394 | dprintk("NFSD: expire_client cl_count %d\n", | |
395 | atomic_read(&clp->cl_count)); | |
396 | ||
4e2fd495 | 397 | shutdown_callback_client(clp); |
1da177e4 LT |
398 | |
399 | INIT_LIST_HEAD(&reaplist); | |
400 | spin_lock(&recall_lock); | |
ea1da636 N |
401 | while (!list_empty(&clp->cl_delegations)) { |
402 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
1da177e4 LT |
403 | dprintk("NFSD: expire client. dp %p, fp %p\n", dp, |
404 | dp->dl_flock); | |
ea1da636 | 405 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
406 | list_move(&dp->dl_recall_lru, &reaplist); |
407 | } | |
408 | spin_unlock(&recall_lock); | |
409 | while (!list_empty(&reaplist)) { | |
410 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
411 | list_del_init(&dp->dl_recall_lru); | |
412 | unhash_delegation(dp); | |
413 | } | |
414 | list_del(&clp->cl_idhash); | |
415 | list_del(&clp->cl_strhash); | |
416 | list_del(&clp->cl_lru); | |
ea1da636 N |
417 | while (!list_empty(&clp->cl_openowners)) { |
418 | sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient); | |
1da177e4 LT |
419 | release_stateowner(sop); |
420 | } | |
421 | put_nfs4_client(clp); | |
422 | } | |
423 | ||
424 | static struct nfs4_client * | |
a55370a3 | 425 | create_client(struct xdr_netobj name, char *recdir) { |
1da177e4 LT |
426 | struct nfs4_client *clp; |
427 | ||
428 | if (!(clp = alloc_client(name))) | |
429 | goto out; | |
a55370a3 | 430 | memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); |
1da177e4 LT |
431 | atomic_set(&clp->cl_count, 1); |
432 | atomic_set(&clp->cl_callback.cb_set, 0); | |
1da177e4 LT |
433 | INIT_LIST_HEAD(&clp->cl_idhash); |
434 | INIT_LIST_HEAD(&clp->cl_strhash); | |
ea1da636 N |
435 | INIT_LIST_HEAD(&clp->cl_openowners); |
436 | INIT_LIST_HEAD(&clp->cl_delegations); | |
1da177e4 LT |
437 | INIT_LIST_HEAD(&clp->cl_lru); |
438 | out: | |
439 | return clp; | |
440 | } | |
441 | ||
442 | static void | |
443 | copy_verf(struct nfs4_client *target, nfs4_verifier *source) { | |
444 | memcpy(target->cl_verifier.data, source->data, sizeof(target->cl_verifier.data)); | |
445 | } | |
446 | ||
447 | static void | |
448 | copy_clid(struct nfs4_client *target, struct nfs4_client *source) { | |
449 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; | |
450 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
451 | } | |
452 | ||
453 | static void | |
454 | copy_cred(struct svc_cred *target, struct svc_cred *source) { | |
455 | ||
456 | target->cr_uid = source->cr_uid; | |
457 | target->cr_gid = source->cr_gid; | |
458 | target->cr_group_info = source->cr_group_info; | |
459 | get_group_info(target->cr_group_info); | |
460 | } | |
461 | ||
a55370a3 N |
462 | static inline int |
463 | same_name(const char *n1, const char *n2) { | |
464 | return 0 == memcmp(n1, n2, HEXDIR_LEN); | |
1da177e4 LT |
465 | } |
466 | ||
467 | static int | |
468 | cmp_verf(nfs4_verifier *v1, nfs4_verifier *v2) { | |
469 | return(!memcmp(v1->data,v2->data,sizeof(v1->data))); | |
470 | } | |
471 | ||
472 | static int | |
473 | cmp_clid(clientid_t * cl1, clientid_t * cl2) { | |
474 | return((cl1->cl_boot == cl2->cl_boot) && | |
475 | (cl1->cl_id == cl2->cl_id)); | |
476 | } | |
477 | ||
478 | /* XXX what about NGROUP */ | |
479 | static int | |
480 | cmp_creds(struct svc_cred *cr1, struct svc_cred *cr2){ | |
481 | return(cr1->cr_uid == cr2->cr_uid); | |
482 | ||
483 | } | |
484 | ||
485 | static void | |
486 | gen_clid(struct nfs4_client *clp) { | |
487 | clp->cl_clientid.cl_boot = boot_time; | |
488 | clp->cl_clientid.cl_id = current_clientid++; | |
489 | } | |
490 | ||
491 | static void | |
492 | gen_confirm(struct nfs4_client *clp) { | |
493 | struct timespec tv; | |
494 | u32 * p; | |
495 | ||
496 | tv = CURRENT_TIME; | |
497 | p = (u32 *)clp->cl_confirm.data; | |
498 | *p++ = tv.tv_sec; | |
499 | *p++ = tv.tv_nsec; | |
500 | } | |
501 | ||
502 | static int | |
503 | check_name(struct xdr_netobj name) { | |
504 | ||
505 | if (name.len == 0) | |
506 | return 0; | |
507 | if (name.len > NFS4_OPAQUE_LIMIT) { | |
508 | printk("NFSD: check_name: name too long(%d)!\n", name.len); | |
509 | return 0; | |
510 | } | |
511 | return 1; | |
512 | } | |
513 | ||
fd39ca9a | 514 | static void |
1da177e4 LT |
515 | add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) |
516 | { | |
517 | unsigned int idhashval; | |
518 | ||
519 | list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); | |
520 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
521 | list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); | |
522 | list_add_tail(&clp->cl_lru, &client_lru); | |
523 | clp->cl_time = get_seconds(); | |
524 | } | |
525 | ||
fd39ca9a | 526 | static void |
1da177e4 LT |
527 | move_to_confirmed(struct nfs4_client *clp) |
528 | { | |
529 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
530 | unsigned int strhashval; | |
531 | ||
532 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
533 | list_del_init(&clp->cl_strhash); | |
f116629d | 534 | list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); |
a55370a3 | 535 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 LT |
536 | list_add(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); |
537 | renew_client(clp); | |
538 | } | |
539 | ||
540 | static struct nfs4_client * | |
541 | find_confirmed_client(clientid_t *clid) | |
542 | { | |
543 | struct nfs4_client *clp; | |
544 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
545 | ||
546 | list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { | |
547 | if (cmp_clid(&clp->cl_clientid, clid)) | |
548 | return clp; | |
549 | } | |
550 | return NULL; | |
551 | } | |
552 | ||
553 | static struct nfs4_client * | |
554 | find_unconfirmed_client(clientid_t *clid) | |
555 | { | |
556 | struct nfs4_client *clp; | |
557 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
558 | ||
559 | list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { | |
560 | if (cmp_clid(&clp->cl_clientid, clid)) | |
561 | return clp; | |
562 | } | |
563 | return NULL; | |
564 | } | |
565 | ||
28ce6054 N |
566 | static struct nfs4_client * |
567 | find_confirmed_client_by_str(const char *dname, unsigned int hashval) | |
568 | { | |
569 | struct nfs4_client *clp; | |
570 | ||
571 | list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { | |
572 | if (same_name(clp->cl_recdir, dname)) | |
573 | return clp; | |
574 | } | |
575 | return NULL; | |
576 | } | |
577 | ||
578 | static struct nfs4_client * | |
579 | find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) | |
580 | { | |
581 | struct nfs4_client *clp; | |
582 | ||
583 | list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { | |
584 | if (same_name(clp->cl_recdir, dname)) | |
585 | return clp; | |
586 | } | |
587 | return NULL; | |
588 | } | |
589 | ||
1da177e4 LT |
590 | /* a helper function for parse_callback */ |
591 | static int | |
592 | parse_octet(unsigned int *lenp, char **addrp) | |
593 | { | |
594 | unsigned int len = *lenp; | |
595 | char *p = *addrp; | |
596 | int n = -1; | |
597 | char c; | |
598 | ||
599 | for (;;) { | |
600 | if (!len) | |
601 | break; | |
602 | len--; | |
603 | c = *p++; | |
604 | if (c == '.') | |
605 | break; | |
606 | if ((c < '0') || (c > '9')) { | |
607 | n = -1; | |
608 | break; | |
609 | } | |
610 | if (n < 0) | |
611 | n = 0; | |
612 | n = (n * 10) + (c - '0'); | |
613 | if (n > 255) { | |
614 | n = -1; | |
615 | break; | |
616 | } | |
617 | } | |
618 | *lenp = len; | |
619 | *addrp = p; | |
620 | return n; | |
621 | } | |
622 | ||
623 | /* parse and set the setclientid ipv4 callback address */ | |
fd39ca9a | 624 | static int |
1da177e4 LT |
625 | parse_ipv4(unsigned int addr_len, char *addr_val, unsigned int *cbaddrp, unsigned short *cbportp) |
626 | { | |
627 | int temp = 0; | |
628 | u32 cbaddr = 0; | |
629 | u16 cbport = 0; | |
630 | u32 addrlen = addr_len; | |
631 | char *addr = addr_val; | |
632 | int i, shift; | |
633 | ||
634 | /* ipaddress */ | |
635 | shift = 24; | |
636 | for(i = 4; i > 0 ; i--) { | |
637 | if ((temp = parse_octet(&addrlen, &addr)) < 0) { | |
638 | return 0; | |
639 | } | |
640 | cbaddr |= (temp << shift); | |
641 | if (shift > 0) | |
642 | shift -= 8; | |
643 | } | |
644 | *cbaddrp = cbaddr; | |
645 | ||
646 | /* port */ | |
647 | shift = 8; | |
648 | for(i = 2; i > 0 ; i--) { | |
649 | if ((temp = parse_octet(&addrlen, &addr)) < 0) { | |
650 | return 0; | |
651 | } | |
652 | cbport |= (temp << shift); | |
653 | if (shift > 0) | |
654 | shift -= 8; | |
655 | } | |
656 | *cbportp = cbport; | |
657 | return 1; | |
658 | } | |
659 | ||
fd39ca9a | 660 | static void |
1da177e4 LT |
661 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se) |
662 | { | |
663 | struct nfs4_callback *cb = &clp->cl_callback; | |
664 | ||
665 | /* Currently, we only support tcp for the callback channel */ | |
666 | if ((se->se_callback_netid_len != 3) || memcmp((char *)se->se_callback_netid_val, "tcp", 3)) | |
667 | goto out_err; | |
668 | ||
669 | if ( !(parse_ipv4(se->se_callback_addr_len, se->se_callback_addr_val, | |
670 | &cb->cb_addr, &cb->cb_port))) | |
671 | goto out_err; | |
672 | cb->cb_prog = se->se_callback_prog; | |
673 | cb->cb_ident = se->se_callback_ident; | |
1da177e4 LT |
674 | return; |
675 | out_err: | |
849823c5 | 676 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
677 | "will not receive delegations\n", |
678 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
679 | ||
1da177e4 LT |
680 | return; |
681 | } | |
682 | ||
683 | /* | |
684 | * RFC 3010 has a complex implmentation description of processing a | |
685 | * SETCLIENTID request consisting of 5 bullets, labeled as | |
686 | * CASE0 - CASE4 below. | |
687 | * | |
688 | * NOTES: | |
689 | * callback information will be processed in a future patch | |
690 | * | |
691 | * an unconfirmed record is added when: | |
692 | * NORMAL (part of CASE 4): there is no confirmed nor unconfirmed record. | |
693 | * CASE 1: confirmed record found with matching name, principal, | |
694 | * verifier, and clientid. | |
695 | * CASE 2: confirmed record found with matching name, principal, | |
696 | * and there is no unconfirmed record with matching | |
697 | * name and principal | |
698 | * | |
699 | * an unconfirmed record is replaced when: | |
700 | * CASE 3: confirmed record found with matching name, principal, | |
701 | * and an unconfirmed record is found with matching | |
702 | * name, principal, and with clientid and | |
703 | * confirm that does not match the confirmed record. | |
704 | * CASE 4: there is no confirmed record with matching name and | |
705 | * principal. there is an unconfirmed record with | |
706 | * matching name, principal. | |
707 | * | |
708 | * an unconfirmed record is deleted when: | |
709 | * CASE 1: an unconfirmed record that matches input name, verifier, | |
710 | * and confirmed clientid. | |
711 | * CASE 4: any unconfirmed records with matching name and principal | |
712 | * that exist after an unconfirmed record has been replaced | |
713 | * as described above. | |
714 | * | |
715 | */ | |
b37ad28b | 716 | __be32 |
b591480b BF |
717 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
718 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 719 | { |
27459f09 | 720 | struct sockaddr_in *sin = svc_addr_in(rqstp); |
1da177e4 LT |
721 | struct xdr_netobj clname = { |
722 | .len = setclid->se_namelen, | |
723 | .data = setclid->se_name, | |
724 | }; | |
725 | nfs4_verifier clverifier = setclid->se_verf; | |
726 | unsigned int strhashval; | |
28ce6054 | 727 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 728 | __be32 status; |
a55370a3 | 729 | char dname[HEXDIR_LEN]; |
1da177e4 | 730 | |
1da177e4 | 731 | if (!check_name(clname)) |
73aea4ec | 732 | return nfserr_inval; |
1da177e4 | 733 | |
a55370a3 N |
734 | status = nfs4_make_rec_clidname(dname, &clname); |
735 | if (status) | |
73aea4ec | 736 | return status; |
a55370a3 | 737 | |
1da177e4 LT |
738 | /* |
739 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
740 | * We get here on a DRC miss. | |
741 | */ | |
742 | ||
a55370a3 | 743 | strhashval = clientstr_hashval(dname); |
1da177e4 | 744 | |
1da177e4 | 745 | nfs4_lock_state(); |
28ce6054 N |
746 | conf = find_confirmed_client_by_str(dname, strhashval); |
747 | if (conf) { | |
1da177e4 LT |
748 | /* |
749 | * CASE 0: | |
750 | * clname match, confirmed, different principal | |
751 | * or different ip_address | |
752 | */ | |
753 | status = nfserr_clid_inuse; | |
28ce6054 | 754 | if (!cmp_creds(&conf->cl_cred, &rqstp->rq_cred) |
27459f09 | 755 | || conf->cl_addr != sin->sin_addr.s_addr) { |
21315edd BF |
756 | dprintk("NFSD: setclientid: string in use by client" |
757 | "at %u.%u.%u.%u\n", NIPQUAD(conf->cl_addr)); | |
1da177e4 LT |
758 | goto out; |
759 | } | |
1da177e4 | 760 | } |
28ce6054 | 761 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
1da177e4 LT |
762 | status = nfserr_resource; |
763 | if (!conf) { | |
764 | /* | |
765 | * CASE 4: | |
766 | * placed first, because it is the normal case. | |
767 | */ | |
768 | if (unconf) | |
769 | expire_client(unconf); | |
a55370a3 N |
770 | new = create_client(clname, dname); |
771 | if (new == NULL) | |
1da177e4 LT |
772 | goto out; |
773 | copy_verf(new, &clverifier); | |
27459f09 | 774 | new->cl_addr = sin->sin_addr.s_addr; |
1da177e4 LT |
775 | copy_cred(&new->cl_cred,&rqstp->rq_cred); |
776 | gen_clid(new); | |
777 | gen_confirm(new); | |
778 | gen_callback(new, setclid); | |
779 | add_to_unconfirmed(new, strhashval); | |
780 | } else if (cmp_verf(&conf->cl_verifier, &clverifier)) { | |
781 | /* | |
782 | * CASE 1: | |
783 | * cl_name match, confirmed, principal match | |
784 | * verifier match: probable callback update | |
785 | * | |
786 | * remove any unconfirmed nfs4_client with | |
787 | * matching cl_name, cl_verifier, and cl_clientid | |
788 | * | |
789 | * create and insert an unconfirmed nfs4_client with same | |
790 | * cl_name, cl_verifier, and cl_clientid as existing | |
791 | * nfs4_client, but with the new callback info and a | |
792 | * new cl_confirm | |
793 | */ | |
31f4a6c1 N |
794 | if (unconf) { |
795 | /* Note this is removing unconfirmed {*x***}, | |
796 | * which is stronger than RFC recommended {vxc**}. | |
797 | * This has the advantage that there is at most | |
798 | * one {*x***} in either list at any time. | |
799 | */ | |
800 | expire_client(unconf); | |
1da177e4 | 801 | } |
a55370a3 N |
802 | new = create_client(clname, dname); |
803 | if (new == NULL) | |
1da177e4 LT |
804 | goto out; |
805 | copy_verf(new,&conf->cl_verifier); | |
27459f09 | 806 | new->cl_addr = sin->sin_addr.s_addr; |
1da177e4 LT |
807 | copy_cred(&new->cl_cred,&rqstp->rq_cred); |
808 | copy_clid(new, conf); | |
809 | gen_confirm(new); | |
810 | gen_callback(new, setclid); | |
811 | add_to_unconfirmed(new,strhashval); | |
812 | } else if (!unconf) { | |
813 | /* | |
814 | * CASE 2: | |
815 | * clname match, confirmed, principal match | |
816 | * verfier does not match | |
817 | * no unconfirmed. create a new unconfirmed nfs4_client | |
818 | * using input clverifier, clname, and callback info | |
819 | * and generate a new cl_clientid and cl_confirm. | |
820 | */ | |
a55370a3 N |
821 | new = create_client(clname, dname); |
822 | if (new == NULL) | |
1da177e4 LT |
823 | goto out; |
824 | copy_verf(new,&clverifier); | |
27459f09 | 825 | new->cl_addr = sin->sin_addr.s_addr; |
1da177e4 LT |
826 | copy_cred(&new->cl_cred,&rqstp->rq_cred); |
827 | gen_clid(new); | |
828 | gen_confirm(new); | |
829 | gen_callback(new, setclid); | |
830 | add_to_unconfirmed(new, strhashval); | |
831 | } else if (!cmp_verf(&conf->cl_confirm, &unconf->cl_confirm)) { | |
832 | /* | |
833 | * CASE3: | |
834 | * confirmed found (name, principal match) | |
835 | * confirmed verifier does not match input clverifier | |
836 | * | |
837 | * unconfirmed found (name match) | |
838 | * confirmed->cl_confirm != unconfirmed->cl_confirm | |
839 | * | |
840 | * remove unconfirmed. | |
841 | * | |
842 | * create an unconfirmed nfs4_client | |
843 | * with same cl_name as existing confirmed nfs4_client, | |
844 | * but with new callback info, new cl_clientid, | |
845 | * new cl_verifier and a new cl_confirm | |
846 | */ | |
847 | expire_client(unconf); | |
a55370a3 N |
848 | new = create_client(clname, dname); |
849 | if (new == NULL) | |
1da177e4 LT |
850 | goto out; |
851 | copy_verf(new,&clverifier); | |
27459f09 | 852 | new->cl_addr = sin->sin_addr.s_addr; |
1da177e4 LT |
853 | copy_cred(&new->cl_cred,&rqstp->rq_cred); |
854 | gen_clid(new); | |
855 | gen_confirm(new); | |
856 | gen_callback(new, setclid); | |
857 | add_to_unconfirmed(new, strhashval); | |
858 | } else { | |
859 | /* No cases hit !!! */ | |
860 | status = nfserr_inval; | |
861 | goto out; | |
862 | ||
863 | } | |
864 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; | |
865 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
866 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
867 | status = nfs_ok; | |
868 | out: | |
869 | nfs4_unlock_state(); | |
870 | return status; | |
871 | } | |
872 | ||
873 | ||
874 | /* | |
875 | * RFC 3010 has a complex implmentation description of processing a | |
876 | * SETCLIENTID_CONFIRM request consisting of 4 bullets describing | |
877 | * processing on a DRC miss, labeled as CASE1 - CASE4 below. | |
878 | * | |
879 | * NOTE: callback information will be processed here in a future patch | |
880 | */ | |
b37ad28b | 881 | __be32 |
b591480b BF |
882 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
883 | struct nfsd4_compound_state *cstate, | |
884 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 885 | { |
27459f09 | 886 | struct sockaddr_in *sin = svc_addr_in(rqstp); |
21ab45a4 | 887 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
888 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
889 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 890 | __be32 status; |
1da177e4 LT |
891 | |
892 | if (STALE_CLIENTID(clid)) | |
893 | return nfserr_stale_clientid; | |
894 | /* | |
895 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
896 | * We get here on a DRC miss. | |
897 | */ | |
898 | ||
899 | nfs4_lock_state(); | |
21ab45a4 N |
900 | |
901 | conf = find_confirmed_client(clid); | |
902 | unconf = find_unconfirmed_client(clid); | |
903 | ||
904 | status = nfserr_clid_inuse; | |
27459f09 | 905 | if (conf && conf->cl_addr != sin->sin_addr.s_addr) |
21ab45a4 | 906 | goto out; |
27459f09 | 907 | if (unconf && unconf->cl_addr != sin->sin_addr.s_addr) |
21ab45a4 N |
908 | goto out; |
909 | ||
1da177e4 LT |
910 | if ((conf && unconf) && |
911 | (cmp_verf(&unconf->cl_confirm, &confirm)) && | |
912 | (cmp_verf(&conf->cl_verifier, &unconf->cl_verifier)) && | |
a55370a3 | 913 | (same_name(conf->cl_recdir,unconf->cl_recdir)) && |
1da177e4 | 914 | (!cmp_verf(&conf->cl_confirm, &unconf->cl_confirm))) { |
7c79f737 N |
915 | /* CASE 1: |
916 | * unconf record that matches input clientid and input confirm. | |
917 | * conf record that matches input clientid. | |
918 | * conf and unconf records match names, verifiers | |
919 | */ | |
1da177e4 LT |
920 | if (!cmp_creds(&conf->cl_cred, &unconf->cl_cred)) |
921 | status = nfserr_clid_inuse; | |
922 | else { | |
1a69c179 N |
923 | /* XXX: We just turn off callbacks until we can handle |
924 | * change request correctly. */ | |
cb36d634 | 925 | atomic_set(&conf->cl_callback.cb_set, 0); |
21ab45a4 | 926 | gen_confirm(conf); |
46309029 | 927 | nfsd4_remove_clid_dir(unconf); |
1a69c179 | 928 | expire_client(unconf); |
1da177e4 | 929 | status = nfs_ok; |
1a69c179 | 930 | |
1da177e4 | 931 | } |
7c79f737 | 932 | } else if ((conf && !unconf) || |
1da177e4 LT |
933 | ((conf && unconf) && |
934 | (!cmp_verf(&conf->cl_verifier, &unconf->cl_verifier) || | |
a55370a3 | 935 | !same_name(conf->cl_recdir, unconf->cl_recdir)))) { |
7c79f737 N |
936 | /* CASE 2: |
937 | * conf record that matches input clientid. | |
938 | * if unconf record matches input clientid, then | |
939 | * unconf->cl_name or unconf->cl_verifier don't match the | |
940 | * conf record. | |
941 | */ | |
21ab45a4 | 942 | if (!cmp_creds(&conf->cl_cred,&rqstp->rq_cred)) |
1da177e4 | 943 | status = nfserr_clid_inuse; |
21ab45a4 | 944 | else |
1da177e4 | 945 | status = nfs_ok; |
7c79f737 N |
946 | } else if (!conf && unconf |
947 | && cmp_verf(&unconf->cl_confirm, &confirm)) { | |
948 | /* CASE 3: | |
949 | * conf record not found. | |
950 | * unconf record found. | |
951 | * unconf->cl_confirm matches input confirm | |
952 | */ | |
1da177e4 LT |
953 | if (!cmp_creds(&unconf->cl_cred, &rqstp->rq_cred)) { |
954 | status = nfserr_clid_inuse; | |
955 | } else { | |
1a69c179 N |
956 | unsigned int hash = |
957 | clientstr_hashval(unconf->cl_recdir); | |
958 | conf = find_confirmed_client_by_str(unconf->cl_recdir, | |
959 | hash); | |
960 | if (conf) { | |
c7b9a459 | 961 | nfsd4_remove_clid_dir(conf); |
1a69c179 N |
962 | expire_client(conf); |
963 | } | |
1da177e4 | 964 | move_to_confirmed(unconf); |
21ab45a4 | 965 | conf = unconf; |
1a69c179 | 966 | status = nfs_ok; |
1da177e4 | 967 | } |
7c79f737 N |
968 | } else if ((!conf || (conf && !cmp_verf(&conf->cl_confirm, &confirm))) |
969 | && (!unconf || (unconf && !cmp_verf(&unconf->cl_confirm, | |
970 | &confirm)))) { | |
971 | /* CASE 4: | |
972 | * conf record not found, or if conf, conf->cl_confirm does not | |
973 | * match input confirm. | |
974 | * unconf record not found, or if unconf, unconf->cl_confirm | |
975 | * does not match input confirm. | |
976 | */ | |
1da177e4 | 977 | status = nfserr_stale_clientid; |
7c79f737 | 978 | } else { |
08e8987c N |
979 | /* check that we have hit one of the cases...*/ |
980 | status = nfserr_clid_inuse; | |
981 | } | |
1da177e4 LT |
982 | out: |
983 | if (!status) | |
21ab45a4 | 984 | nfsd4_probe_callback(conf); |
1da177e4 LT |
985 | nfs4_unlock_state(); |
986 | return status; | |
987 | } | |
988 | ||
1da177e4 LT |
989 | /* OPEN Share state helper functions */ |
990 | static inline struct nfs4_file * | |
991 | alloc_init_file(struct inode *ino) | |
992 | { | |
993 | struct nfs4_file *fp; | |
994 | unsigned int hashval = file_hashval(ino); | |
995 | ||
e60d4398 N |
996 | fp = kmem_cache_alloc(file_slab, GFP_KERNEL); |
997 | if (fp) { | |
13cd2184 | 998 | kref_init(&fp->fi_ref); |
1da177e4 | 999 | INIT_LIST_HEAD(&fp->fi_hash); |
8beefa24 N |
1000 | INIT_LIST_HEAD(&fp->fi_stateids); |
1001 | INIT_LIST_HEAD(&fp->fi_delegations); | |
1da177e4 LT |
1002 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); |
1003 | fp->fi_inode = igrab(ino); | |
1004 | fp->fi_id = current_fileid++; | |
1da177e4 LT |
1005 | return fp; |
1006 | } | |
1007 | return NULL; | |
1008 | } | |
1009 | ||
e60d4398 | 1010 | static void |
e18b890b | 1011 | nfsd4_free_slab(struct kmem_cache **slab) |
1da177e4 | 1012 | { |
e60d4398 N |
1013 | if (*slab == NULL) |
1014 | return; | |
1a1d92c1 | 1015 | kmem_cache_destroy(*slab); |
e60d4398 | 1016 | *slab = NULL; |
1da177e4 LT |
1017 | } |
1018 | ||
1019 | static void | |
1020 | nfsd4_free_slabs(void) | |
1021 | { | |
e60d4398 N |
1022 | nfsd4_free_slab(&stateowner_slab); |
1023 | nfsd4_free_slab(&file_slab); | |
5ac049ac | 1024 | nfsd4_free_slab(&stateid_slab); |
5b2d21c1 | 1025 | nfsd4_free_slab(&deleg_slab); |
e60d4398 | 1026 | } |
1da177e4 | 1027 | |
e60d4398 N |
1028 | static int |
1029 | nfsd4_init_slabs(void) | |
1030 | { | |
1031 | stateowner_slab = kmem_cache_create("nfsd4_stateowners", | |
1032 | sizeof(struct nfs4_stateowner), 0, 0, NULL, NULL); | |
1033 | if (stateowner_slab == NULL) | |
1034 | goto out_nomem; | |
1035 | file_slab = kmem_cache_create("nfsd4_files", | |
1036 | sizeof(struct nfs4_file), 0, 0, NULL, NULL); | |
1037 | if (file_slab == NULL) | |
1038 | goto out_nomem; | |
5ac049ac N |
1039 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
1040 | sizeof(struct nfs4_stateid), 0, 0, NULL, NULL); | |
1041 | if (stateid_slab == NULL) | |
1042 | goto out_nomem; | |
5b2d21c1 N |
1043 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
1044 | sizeof(struct nfs4_delegation), 0, 0, NULL, NULL); | |
1045 | if (deleg_slab == NULL) | |
1046 | goto out_nomem; | |
e60d4398 N |
1047 | return 0; |
1048 | out_nomem: | |
1049 | nfsd4_free_slabs(); | |
1050 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | |
1051 | return -ENOMEM; | |
1da177e4 LT |
1052 | } |
1053 | ||
1054 | void | |
1055 | nfs4_free_stateowner(struct kref *kref) | |
1056 | { | |
1057 | struct nfs4_stateowner *sop = | |
1058 | container_of(kref, struct nfs4_stateowner, so_ref); | |
1059 | kfree(sop->so_owner.data); | |
1060 | kmem_cache_free(stateowner_slab, sop); | |
1061 | } | |
1062 | ||
1063 | static inline struct nfs4_stateowner * | |
1064 | alloc_stateowner(struct xdr_netobj *owner) | |
1065 | { | |
1066 | struct nfs4_stateowner *sop; | |
1067 | ||
1068 | if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) { | |
1069 | if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) { | |
1070 | memcpy(sop->so_owner.data, owner->data, owner->len); | |
1071 | sop->so_owner.len = owner->len; | |
1072 | kref_init(&sop->so_ref); | |
1073 | return sop; | |
1074 | } | |
1075 | kmem_cache_free(stateowner_slab, sop); | |
1076 | } | |
1077 | return NULL; | |
1078 | } | |
1079 | ||
1080 | static struct nfs4_stateowner * | |
1081 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { | |
1082 | struct nfs4_stateowner *sop; | |
1083 | struct nfs4_replay *rp; | |
1084 | unsigned int idhashval; | |
1085 | ||
1086 | if (!(sop = alloc_stateowner(&open->op_owner))) | |
1087 | return NULL; | |
1088 | idhashval = ownerid_hashval(current_ownerid); | |
1089 | INIT_LIST_HEAD(&sop->so_idhash); | |
1090 | INIT_LIST_HEAD(&sop->so_strhash); | |
1091 | INIT_LIST_HEAD(&sop->so_perclient); | |
ea1da636 N |
1092 | INIT_LIST_HEAD(&sop->so_stateids); |
1093 | INIT_LIST_HEAD(&sop->so_perstateid); /* not used */ | |
1da177e4 LT |
1094 | INIT_LIST_HEAD(&sop->so_close_lru); |
1095 | sop->so_time = 0; | |
1096 | list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]); | |
1097 | list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]); | |
ea1da636 | 1098 | list_add(&sop->so_perclient, &clp->cl_openowners); |
1da177e4 LT |
1099 | sop->so_is_open_owner = 1; |
1100 | sop->so_id = current_ownerid++; | |
1101 | sop->so_client = clp; | |
1102 | sop->so_seqid = open->op_seqid; | |
1103 | sop->so_confirmed = 0; | |
1104 | rp = &sop->so_replay; | |
de1ae286 | 1105 | rp->rp_status = nfserr_serverfault; |
1da177e4 LT |
1106 | rp->rp_buflen = 0; |
1107 | rp->rp_buf = rp->rp_ibuf; | |
1108 | return sop; | |
1109 | } | |
1110 | ||
1111 | static void | |
1112 | release_stateid_lockowners(struct nfs4_stateid *open_stp) | |
1113 | { | |
1114 | struct nfs4_stateowner *lock_sop; | |
1115 | ||
ea1da636 N |
1116 | while (!list_empty(&open_stp->st_lockowners)) { |
1117 | lock_sop = list_entry(open_stp->st_lockowners.next, | |
1118 | struct nfs4_stateowner, so_perstateid); | |
1119 | /* list_del(&open_stp->st_lockowners); */ | |
1da177e4 LT |
1120 | BUG_ON(lock_sop->so_is_open_owner); |
1121 | release_stateowner(lock_sop); | |
1122 | } | |
1123 | } | |
1124 | ||
1125 | static void | |
1126 | unhash_stateowner(struct nfs4_stateowner *sop) | |
1127 | { | |
1128 | struct nfs4_stateid *stp; | |
1129 | ||
1130 | list_del(&sop->so_idhash); | |
1131 | list_del(&sop->so_strhash); | |
6fa305de | 1132 | if (sop->so_is_open_owner) |
1da177e4 | 1133 | list_del(&sop->so_perclient); |
ea1da636 N |
1134 | list_del(&sop->so_perstateid); |
1135 | while (!list_empty(&sop->so_stateids)) { | |
1136 | stp = list_entry(sop->so_stateids.next, | |
1137 | struct nfs4_stateid, st_perstateowner); | |
1da177e4 LT |
1138 | if (sop->so_is_open_owner) |
1139 | release_stateid(stp, OPEN_STATE); | |
1140 | else | |
1141 | release_stateid(stp, LOCK_STATE); | |
1142 | } | |
1143 | } | |
1144 | ||
1145 | static void | |
1146 | release_stateowner(struct nfs4_stateowner *sop) | |
1147 | { | |
1148 | unhash_stateowner(sop); | |
1149 | list_del(&sop->so_close_lru); | |
1150 | nfs4_put_stateowner(sop); | |
1151 | } | |
1152 | ||
1153 | static inline void | |
1154 | init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { | |
1155 | struct nfs4_stateowner *sop = open->op_stateowner; | |
1156 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); | |
1157 | ||
1158 | INIT_LIST_HEAD(&stp->st_hash); | |
ea1da636 N |
1159 | INIT_LIST_HEAD(&stp->st_perstateowner); |
1160 | INIT_LIST_HEAD(&stp->st_lockowners); | |
1da177e4 LT |
1161 | INIT_LIST_HEAD(&stp->st_perfile); |
1162 | list_add(&stp->st_hash, &stateid_hashtbl[hashval]); | |
ea1da636 | 1163 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
8beefa24 | 1164 | list_add(&stp->st_perfile, &fp->fi_stateids); |
1da177e4 | 1165 | stp->st_stateowner = sop; |
13cd2184 | 1166 | get_nfs4_file(fp); |
1da177e4 LT |
1167 | stp->st_file = fp; |
1168 | stp->st_stateid.si_boot = boot_time; | |
1169 | stp->st_stateid.si_stateownerid = sop->so_id; | |
1170 | stp->st_stateid.si_fileid = fp->fi_id; | |
1171 | stp->st_stateid.si_generation = 0; | |
1172 | stp->st_access_bmap = 0; | |
1173 | stp->st_deny_bmap = 0; | |
1174 | __set_bit(open->op_share_access, &stp->st_access_bmap); | |
1175 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); | |
4c4cd222 | 1176 | stp->st_openstp = NULL; |
1da177e4 LT |
1177 | } |
1178 | ||
1179 | static void | |
1180 | release_stateid(struct nfs4_stateid *stp, int flags) | |
1181 | { | |
1182 | struct file *filp = stp->st_vfs_file; | |
1183 | ||
1184 | list_del(&stp->st_hash); | |
1da177e4 | 1185 | list_del(&stp->st_perfile); |
ea1da636 | 1186 | list_del(&stp->st_perstateowner); |
1da177e4 LT |
1187 | if (flags & OPEN_STATE) { |
1188 | release_stateid_lockowners(stp); | |
1189 | stp->st_vfs_file = NULL; | |
1190 | nfsd_close(filp); | |
1da177e4 LT |
1191 | } else if (flags & LOCK_STATE) |
1192 | locks_remove_posix(filp, (fl_owner_t) stp->st_stateowner); | |
13cd2184 | 1193 | put_nfs4_file(stp->st_file); |
5ac049ac | 1194 | kmem_cache_free(stateid_slab, stp); |
1da177e4 LT |
1195 | } |
1196 | ||
fd39ca9a | 1197 | static void |
1da177e4 LT |
1198 | move_to_close_lru(struct nfs4_stateowner *sop) |
1199 | { | |
1200 | dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); | |
1201 | ||
358dd55a | 1202 | list_move_tail(&sop->so_close_lru, &close_lru); |
1da177e4 LT |
1203 | sop->so_time = get_seconds(); |
1204 | } | |
1205 | ||
1da177e4 LT |
1206 | static int |
1207 | cmp_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, clientid_t *clid) { | |
1208 | return ((sop->so_owner.len == owner->len) && | |
1209 | !memcmp(sop->so_owner.data, owner->data, owner->len) && | |
1210 | (sop->so_client->cl_clientid.cl_id == clid->cl_id)); | |
1211 | } | |
1212 | ||
1213 | static struct nfs4_stateowner * | |
1214 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) | |
1215 | { | |
1216 | struct nfs4_stateowner *so = NULL; | |
1217 | ||
1218 | list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { | |
1219 | if (cmp_owner_str(so, &open->op_owner, &open->op_clientid)) | |
1220 | return so; | |
1221 | } | |
1222 | return NULL; | |
1223 | } | |
1224 | ||
1225 | /* search file_hashtbl[] for file */ | |
1226 | static struct nfs4_file * | |
1227 | find_file(struct inode *ino) | |
1228 | { | |
1229 | unsigned int hashval = file_hashval(ino); | |
1230 | struct nfs4_file *fp; | |
1231 | ||
1232 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { | |
13cd2184 N |
1233 | if (fp->fi_inode == ino) { |
1234 | get_nfs4_file(fp); | |
1da177e4 | 1235 | return fp; |
13cd2184 | 1236 | } |
1da177e4 LT |
1237 | } |
1238 | return NULL; | |
1239 | } | |
1240 | ||
ba5a6a19 BF |
1241 | static int access_valid(u32 x) |
1242 | { | |
1243 | return (x > 0 && x < 4); | |
1244 | } | |
1245 | ||
1246 | static int deny_valid(u32 x) | |
1247 | { | |
1248 | return (x >= 0 && x < 5); | |
1249 | } | |
1da177e4 | 1250 | |
fd39ca9a | 1251 | static void |
1da177e4 LT |
1252 | set_access(unsigned int *access, unsigned long bmap) { |
1253 | int i; | |
1254 | ||
1255 | *access = 0; | |
1256 | for (i = 1; i < 4; i++) { | |
1257 | if (test_bit(i, &bmap)) | |
1258 | *access |= i; | |
1259 | } | |
1260 | } | |
1261 | ||
fd39ca9a | 1262 | static void |
1da177e4 LT |
1263 | set_deny(unsigned int *deny, unsigned long bmap) { |
1264 | int i; | |
1265 | ||
1266 | *deny = 0; | |
1267 | for (i = 0; i < 4; i++) { | |
1268 | if (test_bit(i, &bmap)) | |
1269 | *deny |= i ; | |
1270 | } | |
1271 | } | |
1272 | ||
1273 | static int | |
1274 | test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { | |
1275 | unsigned int access, deny; | |
1276 | ||
1277 | set_access(&access, stp->st_access_bmap); | |
1278 | set_deny(&deny, stp->st_deny_bmap); | |
1279 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) | |
1280 | return 0; | |
1281 | return 1; | |
1282 | } | |
1283 | ||
1284 | /* | |
1285 | * Called to check deny when READ with all zero stateid or | |
1286 | * WRITE with all zero or all one stateid | |
1287 | */ | |
b37ad28b | 1288 | static __be32 |
1da177e4 LT |
1289 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
1290 | { | |
1291 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
1292 | struct nfs4_file *fp; | |
1293 | struct nfs4_stateid *stp; | |
b37ad28b | 1294 | __be32 ret; |
1da177e4 LT |
1295 | |
1296 | dprintk("NFSD: nfs4_share_conflict\n"); | |
1297 | ||
1298 | fp = find_file(ino); | |
13cd2184 N |
1299 | if (!fp) |
1300 | return nfs_ok; | |
b700949b | 1301 | ret = nfserr_locked; |
1da177e4 | 1302 | /* Search for conflicting share reservations */ |
13cd2184 N |
1303 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
1304 | if (test_bit(deny_type, &stp->st_deny_bmap) || | |
1305 | test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) | |
1306 | goto out; | |
1da177e4 | 1307 | } |
13cd2184 N |
1308 | ret = nfs_ok; |
1309 | out: | |
1310 | put_nfs4_file(fp); | |
1311 | return ret; | |
1da177e4 LT |
1312 | } |
1313 | ||
1314 | static inline void | |
1315 | nfs4_file_downgrade(struct file *filp, unsigned int share_access) | |
1316 | { | |
1317 | if (share_access & NFS4_SHARE_ACCESS_WRITE) { | |
7eaa36e2 | 1318 | put_write_access(filp->f_path.dentry->d_inode); |
1da177e4 LT |
1319 | filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE; |
1320 | } | |
1321 | } | |
1322 | ||
1323 | /* | |
1324 | * Recall a delegation | |
1325 | */ | |
1326 | static int | |
1327 | do_recall(void *__dp) | |
1328 | { | |
1329 | struct nfs4_delegation *dp = __dp; | |
1330 | ||
1da177e4 LT |
1331 | nfsd4_cb_recall(dp); |
1332 | return 0; | |
1333 | } | |
1334 | ||
1335 | /* | |
1336 | * Spawn a thread to perform a recall on the delegation represented | |
1337 | * by the lease (file_lock) | |
1338 | * | |
1339 | * Called from break_lease() with lock_kernel() held. | |
1340 | * Note: we assume break_lease will only call this *once* for any given | |
1341 | * lease. | |
1342 | */ | |
1343 | static | |
1344 | void nfsd_break_deleg_cb(struct file_lock *fl) | |
1345 | { | |
1346 | struct nfs4_delegation *dp= (struct nfs4_delegation *)fl->fl_owner; | |
1347 | struct task_struct *t; | |
1348 | ||
1349 | dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl); | |
1350 | if (!dp) | |
1351 | return; | |
1352 | ||
1353 | /* We're assuming the state code never drops its reference | |
1354 | * without first removing the lease. Since we're in this lease | |
1355 | * callback (and since the lease code is serialized by the kernel | |
1356 | * lock) we know the server hasn't removed the lease yet, we know | |
1357 | * it's safe to take a reference: */ | |
1358 | atomic_inc(&dp->dl_count); | |
1359 | ||
1360 | spin_lock(&recall_lock); | |
1361 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); | |
1362 | spin_unlock(&recall_lock); | |
1363 | ||
1364 | /* only place dl_time is set. protected by lock_kernel*/ | |
1365 | dp->dl_time = get_seconds(); | |
1366 | ||
1367 | /* XXX need to merge NFSD_LEASE_TIME with fs/locks.c:lease_break_time */ | |
1368 | fl->fl_break_time = jiffies + NFSD_LEASE_TIME * HZ; | |
1369 | ||
1370 | t = kthread_run(do_recall, dp, "%s", "nfs4_cb_recall"); | |
1371 | if (IS_ERR(t)) { | |
1372 | struct nfs4_client *clp = dp->dl_client; | |
1373 | ||
1374 | printk(KERN_INFO "NFSD: Callback thread failed for " | |
1375 | "for client (clientid %08x/%08x)\n", | |
1376 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
1377 | nfs4_put_delegation(dp); | |
1378 | } | |
1379 | } | |
1380 | ||
1381 | /* | |
1382 | * The file_lock is being reapd. | |
1383 | * | |
1384 | * Called by locks_free_lock() with lock_kernel() held. | |
1385 | */ | |
1386 | static | |
1387 | void nfsd_release_deleg_cb(struct file_lock *fl) | |
1388 | { | |
1389 | struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; | |
1390 | ||
1391 | dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count)); | |
1392 | ||
1393 | if (!(fl->fl_flags & FL_LEASE) || !dp) | |
1394 | return; | |
1395 | dp->dl_flock = NULL; | |
1396 | } | |
1397 | ||
1398 | /* | |
1399 | * Set the delegation file_lock back pointer. | |
1400 | * | |
1401 | * Called from __setlease() with lock_kernel() held. | |
1402 | */ | |
1403 | static | |
1404 | void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl) | |
1405 | { | |
1406 | struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner; | |
1407 | ||
1408 | dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp); | |
1409 | if (!dp) | |
1410 | return; | |
1411 | dp->dl_flock = new; | |
1412 | } | |
1413 | ||
1414 | /* | |
1415 | * Called from __setlease() with lock_kernel() held | |
1416 | */ | |
1417 | static | |
1418 | int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try) | |
1419 | { | |
1420 | struct nfs4_delegation *onlistd = | |
1421 | (struct nfs4_delegation *)onlist->fl_owner; | |
1422 | struct nfs4_delegation *tryd = | |
1423 | (struct nfs4_delegation *)try->fl_owner; | |
1424 | ||
1425 | if (onlist->fl_lmops != try->fl_lmops) | |
1426 | return 0; | |
1427 | ||
1428 | return onlistd->dl_client == tryd->dl_client; | |
1429 | } | |
1430 | ||
1431 | ||
1432 | static | |
1433 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
1434 | { | |
1435 | if (arg & F_UNLCK) | |
1436 | return lease_modify(onlist, arg); | |
1437 | else | |
1438 | return -EAGAIN; | |
1439 | } | |
1440 | ||
fd39ca9a | 1441 | static struct lock_manager_operations nfsd_lease_mng_ops = { |
1da177e4 LT |
1442 | .fl_break = nfsd_break_deleg_cb, |
1443 | .fl_release_private = nfsd_release_deleg_cb, | |
1444 | .fl_copy_lock = nfsd_copy_lock_deleg_cb, | |
1445 | .fl_mylease = nfsd_same_client_deleg_cb, | |
1446 | .fl_change = nfsd_change_deleg_cb, | |
1447 | }; | |
1448 | ||
1449 | ||
b37ad28b | 1450 | __be32 |
1da177e4 LT |
1451 | nfsd4_process_open1(struct nfsd4_open *open) |
1452 | { | |
1da177e4 LT |
1453 | clientid_t *clientid = &open->op_clientid; |
1454 | struct nfs4_client *clp = NULL; | |
1455 | unsigned int strhashval; | |
1456 | struct nfs4_stateowner *sop = NULL; | |
1457 | ||
1da177e4 | 1458 | if (!check_name(open->op_owner)) |
0f442aa2 | 1459 | return nfserr_inval; |
1da177e4 LT |
1460 | |
1461 | if (STALE_CLIENTID(&open->op_clientid)) | |
1462 | return nfserr_stale_clientid; | |
1463 | ||
1464 | strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner); | |
1465 | sop = find_openstateowner_str(strhashval, open); | |
0f442aa2 BF |
1466 | open->op_stateowner = sop; |
1467 | if (!sop) { | |
1468 | /* Make sure the client's lease hasn't expired. */ | |
1da177e4 LT |
1469 | clp = find_confirmed_client(clientid); |
1470 | if (clp == NULL) | |
0f442aa2 BF |
1471 | return nfserr_expired; |
1472 | goto renew; | |
1da177e4 | 1473 | } |
0f442aa2 BF |
1474 | if (!sop->so_confirmed) { |
1475 | /* Replace unconfirmed owners without checking for replay. */ | |
1476 | clp = sop->so_client; | |
1477 | release_stateowner(sop); | |
1478 | open->op_stateowner = NULL; | |
1479 | goto renew; | |
1480 | } | |
1481 | if (open->op_seqid == sop->so_seqid - 1) { | |
1482 | if (sop->so_replay.rp_buflen) | |
a90b061c | 1483 | return nfserr_replay_me; |
0f442aa2 BF |
1484 | /* The original OPEN failed so spectacularly |
1485 | * that we don't even have replay data saved! | |
1486 | * Therefore, we have no choice but to continue | |
1487 | * processing this OPEN; presumably, we'll | |
1488 | * fail again for the same reason. | |
1489 | */ | |
1490 | dprintk("nfsd4_process_open1: replay with no replay cache\n"); | |
1491 | goto renew; | |
1492 | } | |
1493 | if (open->op_seqid != sop->so_seqid) | |
1494 | return nfserr_bad_seqid; | |
1da177e4 | 1495 | renew: |
0f442aa2 BF |
1496 | if (open->op_stateowner == NULL) { |
1497 | sop = alloc_init_open_stateowner(strhashval, clp, open); | |
1498 | if (sop == NULL) | |
1499 | return nfserr_resource; | |
1500 | open->op_stateowner = sop; | |
1501 | } | |
1502 | list_del_init(&sop->so_close_lru); | |
1da177e4 | 1503 | renew_client(sop->so_client); |
0f442aa2 | 1504 | return nfs_ok; |
1da177e4 LT |
1505 | } |
1506 | ||
b37ad28b | 1507 | static inline __be32 |
4a6e43e6 N |
1508 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
1509 | { | |
1510 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
1511 | return nfserr_openmode; | |
1512 | else | |
1513 | return nfs_ok; | |
1514 | } | |
1515 | ||
52f4fb43 N |
1516 | static struct nfs4_delegation * |
1517 | find_delegation_file(struct nfs4_file *fp, stateid_t *stid) | |
1518 | { | |
1519 | struct nfs4_delegation *dp; | |
1520 | ||
ea1da636 | 1521 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) { |
52f4fb43 N |
1522 | if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) |
1523 | return dp; | |
1524 | } | |
1525 | return NULL; | |
1526 | } | |
1527 | ||
b37ad28b | 1528 | static __be32 |
567d9829 N |
1529 | nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, |
1530 | struct nfs4_delegation **dp) | |
1531 | { | |
1532 | int flags; | |
b37ad28b | 1533 | __be32 status = nfserr_bad_stateid; |
567d9829 N |
1534 | |
1535 | *dp = find_delegation_file(fp, &open->op_delegate_stateid); | |
1536 | if (*dp == NULL) | |
c44c5eeb | 1537 | goto out; |
567d9829 N |
1538 | flags = open->op_share_access == NFS4_SHARE_ACCESS_READ ? |
1539 | RD_STATE : WR_STATE; | |
1540 | status = nfs4_check_delegmode(*dp, flags); | |
1541 | if (status) | |
1542 | *dp = NULL; | |
c44c5eeb N |
1543 | out: |
1544 | if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
1545 | return nfs_ok; | |
1546 | if (status) | |
1547 | return status; | |
1548 | open->op_stateowner->so_confirmed = 1; | |
1549 | return nfs_ok; | |
567d9829 N |
1550 | } |
1551 | ||
b37ad28b | 1552 | static __be32 |
1da177e4 LT |
1553 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) |
1554 | { | |
1555 | struct nfs4_stateid *local; | |
b37ad28b | 1556 | __be32 status = nfserr_share_denied; |
1da177e4 LT |
1557 | struct nfs4_stateowner *sop = open->op_stateowner; |
1558 | ||
8beefa24 | 1559 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
1560 | /* ignore lock owners */ |
1561 | if (local->st_stateowner->so_is_open_owner == 0) | |
1562 | continue; | |
1563 | /* remember if we have seen this open owner */ | |
1564 | if (local->st_stateowner == sop) | |
1565 | *stpp = local; | |
1566 | /* check for conflicting share reservations */ | |
1567 | if (!test_share(local, open)) | |
1568 | goto out; | |
1569 | } | |
1570 | status = 0; | |
1571 | out: | |
1572 | return status; | |
1573 | } | |
1574 | ||
5ac049ac N |
1575 | static inline struct nfs4_stateid * |
1576 | nfs4_alloc_stateid(void) | |
1577 | { | |
1578 | return kmem_cache_alloc(stateid_slab, GFP_KERNEL); | |
1579 | } | |
1580 | ||
b37ad28b | 1581 | static __be32 |
1da177e4 | 1582 | nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, |
567d9829 | 1583 | struct nfs4_delegation *dp, |
1da177e4 LT |
1584 | struct svc_fh *cur_fh, int flags) |
1585 | { | |
1586 | struct nfs4_stateid *stp; | |
1da177e4 | 1587 | |
5ac049ac | 1588 | stp = nfs4_alloc_stateid(); |
1da177e4 LT |
1589 | if (stp == NULL) |
1590 | return nfserr_resource; | |
1591 | ||
567d9829 N |
1592 | if (dp) { |
1593 | get_file(dp->dl_vfs_file); | |
1594 | stp->st_vfs_file = dp->dl_vfs_file; | |
1595 | } else { | |
b37ad28b | 1596 | __be32 status; |
567d9829 N |
1597 | status = nfsd_open(rqstp, cur_fh, S_IFREG, flags, |
1598 | &stp->st_vfs_file); | |
1599 | if (status) { | |
1600 | if (status == nfserr_dropit) | |
1601 | status = nfserr_jukebox; | |
5ac049ac | 1602 | kmem_cache_free(stateid_slab, stp); |
567d9829 N |
1603 | return status; |
1604 | } | |
1da177e4 | 1605 | } |
1da177e4 LT |
1606 | *stpp = stp; |
1607 | return 0; | |
1608 | } | |
1609 | ||
b37ad28b | 1610 | static inline __be32 |
1da177e4 LT |
1611 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
1612 | struct nfsd4_open *open) | |
1613 | { | |
1614 | struct iattr iattr = { | |
1615 | .ia_valid = ATTR_SIZE, | |
1616 | .ia_size = 0, | |
1617 | }; | |
1618 | if (!open->op_truncate) | |
1619 | return 0; | |
1620 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 1621 | return nfserr_inval; |
1da177e4 LT |
1622 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
1623 | } | |
1624 | ||
b37ad28b | 1625 | static __be32 |
1da177e4 LT |
1626 | nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open) |
1627 | { | |
1628 | struct file *filp = stp->st_vfs_file; | |
7eaa36e2 | 1629 | struct inode *inode = filp->f_path.dentry->d_inode; |
6c26d08f | 1630 | unsigned int share_access, new_writer; |
b37ad28b | 1631 | __be32 status; |
1da177e4 LT |
1632 | |
1633 | set_access(&share_access, stp->st_access_bmap); | |
6c26d08f BF |
1634 | new_writer = (~share_access) & open->op_share_access |
1635 | & NFS4_SHARE_ACCESS_WRITE; | |
1da177e4 | 1636 | |
6c26d08f | 1637 | if (new_writer) { |
b37ad28b AV |
1638 | int err = get_write_access(inode); |
1639 | if (err) | |
1640 | return nfserrno(err); | |
6c26d08f | 1641 | } |
1da177e4 LT |
1642 | status = nfsd4_truncate(rqstp, cur_fh, open); |
1643 | if (status) { | |
6c26d08f BF |
1644 | if (new_writer) |
1645 | put_write_access(inode); | |
1da177e4 LT |
1646 | return status; |
1647 | } | |
1648 | /* remember the open */ | |
6c26d08f | 1649 | filp->f_mode |= open->op_share_access; |
1da177e4 LT |
1650 | set_bit(open->op_share_access, &stp->st_access_bmap); |
1651 | set_bit(open->op_share_deny, &stp->st_deny_bmap); | |
1652 | ||
1653 | return nfs_ok; | |
1654 | } | |
1655 | ||
1656 | ||
1da177e4 | 1657 | static void |
37515177 | 1658 | nfs4_set_claim_prev(struct nfsd4_open *open) |
1da177e4 | 1659 | { |
37515177 N |
1660 | open->op_stateowner->so_confirmed = 1; |
1661 | open->op_stateowner->so_client->cl_firststate = 1; | |
1da177e4 LT |
1662 | } |
1663 | ||
1664 | /* | |
1665 | * Attempt to hand out a delegation. | |
1666 | */ | |
1667 | static void | |
1668 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) | |
1669 | { | |
1670 | struct nfs4_delegation *dp; | |
1671 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
1672 | struct nfs4_callback *cb = &sop->so_client->cl_callback; | |
1673 | struct file_lock fl, *flp = &fl; | |
1674 | int status, flag = 0; | |
1675 | ||
1676 | flag = NFS4_OPEN_DELEGATE_NONE; | |
7b190fec N |
1677 | open->op_recall = 0; |
1678 | switch (open->op_claim_type) { | |
1679 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
1680 | if (!atomic_read(&cb->cb_set)) | |
1681 | open->op_recall = 1; | |
1682 | flag = open->op_delegate_type; | |
1683 | if (flag == NFS4_OPEN_DELEGATE_NONE) | |
1684 | goto out; | |
1685 | break; | |
1686 | case NFS4_OPEN_CLAIM_NULL: | |
1687 | /* Let's not give out any delegations till everyone's | |
1688 | * had the chance to reclaim theirs.... */ | |
1689 | if (nfs4_in_grace()) | |
1690 | goto out; | |
1691 | if (!atomic_read(&cb->cb_set) || !sop->so_confirmed) | |
1692 | goto out; | |
1693 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | |
1694 | flag = NFS4_OPEN_DELEGATE_WRITE; | |
1695 | else | |
1696 | flag = NFS4_OPEN_DELEGATE_READ; | |
1697 | break; | |
1698 | default: | |
1699 | goto out; | |
1700 | } | |
1da177e4 LT |
1701 | |
1702 | dp = alloc_init_deleg(sop->so_client, stp, fh, flag); | |
1703 | if (dp == NULL) { | |
1704 | flag = NFS4_OPEN_DELEGATE_NONE; | |
1705 | goto out; | |
1706 | } | |
1707 | locks_init_lock(&fl); | |
1708 | fl.fl_lmops = &nfsd_lease_mng_ops; | |
1709 | fl.fl_flags = FL_LEASE; | |
1710 | fl.fl_end = OFFSET_MAX; | |
1711 | fl.fl_owner = (fl_owner_t)dp; | |
1712 | fl.fl_file = stp->st_vfs_file; | |
1713 | fl.fl_pid = current->tgid; | |
1714 | ||
1715 | /* setlease checks to see if delegation should be handed out. | |
1716 | * the lock_manager callbacks fl_mylease and fl_change are used | |
1717 | */ | |
1718 | if ((status = setlease(stp->st_vfs_file, | |
1719 | flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK, &flp))) { | |
1720 | dprintk("NFSD: setlease failed [%d], no delegation\n", status); | |
c907132d | 1721 | unhash_delegation(dp); |
1da177e4 LT |
1722 | flag = NFS4_OPEN_DELEGATE_NONE; |
1723 | goto out; | |
1724 | } | |
1725 | ||
1726 | memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); | |
1727 | ||
1728 | dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n", | |
1729 | dp->dl_stateid.si_boot, | |
1730 | dp->dl_stateid.si_stateownerid, | |
1731 | dp->dl_stateid.si_fileid, | |
1732 | dp->dl_stateid.si_generation); | |
1733 | out: | |
7b190fec N |
1734 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS |
1735 | && flag == NFS4_OPEN_DELEGATE_NONE | |
1736 | && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) | |
1737 | printk("NFSD: WARNING: refusing delegation reclaim\n"); | |
1da177e4 LT |
1738 | open->op_delegate_type = flag; |
1739 | } | |
1740 | ||
1741 | /* | |
1742 | * called with nfs4_lock_state() held. | |
1743 | */ | |
b37ad28b | 1744 | __be32 |
1da177e4 LT |
1745 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
1746 | { | |
1747 | struct nfs4_file *fp = NULL; | |
1748 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
1749 | struct nfs4_stateid *stp = NULL; | |
567d9829 | 1750 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 1751 | __be32 status; |
1da177e4 LT |
1752 | |
1753 | status = nfserr_inval; | |
ba5a6a19 BF |
1754 | if (!access_valid(open->op_share_access) |
1755 | || !deny_valid(open->op_share_deny)) | |
1da177e4 LT |
1756 | goto out; |
1757 | /* | |
1758 | * Lookup file; if found, lookup stateid and check open request, | |
1759 | * and check for delegations in the process of being recalled. | |
1760 | * If not found, create the nfs4_file struct | |
1761 | */ | |
1762 | fp = find_file(ino); | |
1763 | if (fp) { | |
1764 | if ((status = nfs4_check_open(fp, open, &stp))) | |
1765 | goto out; | |
c44c5eeb N |
1766 | status = nfs4_check_deleg(fp, open, &dp); |
1767 | if (status) | |
1768 | goto out; | |
1da177e4 | 1769 | } else { |
c44c5eeb N |
1770 | status = nfserr_bad_stateid; |
1771 | if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
1772 | goto out; | |
1da177e4 LT |
1773 | status = nfserr_resource; |
1774 | fp = alloc_init_file(ino); | |
1775 | if (fp == NULL) | |
1776 | goto out; | |
1777 | } | |
1778 | ||
1779 | /* | |
1780 | * OPEN the file, or upgrade an existing OPEN. | |
1781 | * If truncate fails, the OPEN fails. | |
1782 | */ | |
1783 | if (stp) { | |
1784 | /* Stateid was found, this is an OPEN upgrade */ | |
1785 | status = nfs4_upgrade_open(rqstp, current_fh, stp, open); | |
1786 | if (status) | |
1787 | goto out; | |
444c2c07 | 1788 | update_stateid(&stp->st_stateid); |
1da177e4 LT |
1789 | } else { |
1790 | /* Stateid was not found, this is a new OPEN */ | |
1791 | int flags = 0; | |
9ecb6a08 BF |
1792 | if (open->op_share_access & NFS4_SHARE_ACCESS_READ) |
1793 | flags |= MAY_READ; | |
1da177e4 | 1794 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
9ecb6a08 | 1795 | flags |= MAY_WRITE; |
567d9829 N |
1796 | status = nfs4_new_open(rqstp, &stp, dp, current_fh, flags); |
1797 | if (status) | |
1da177e4 LT |
1798 | goto out; |
1799 | init_stateid(stp, fp, open); | |
1800 | status = nfsd4_truncate(rqstp, current_fh, open); | |
1801 | if (status) { | |
1802 | release_stateid(stp, OPEN_STATE); | |
1803 | goto out; | |
1804 | } | |
1805 | } | |
1806 | memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
1807 | ||
1808 | /* | |
1809 | * Attempt to hand out a delegation. No error return, because the | |
1810 | * OPEN succeeds even if we fail. | |
1811 | */ | |
1812 | nfs4_open_delegation(current_fh, open, stp); | |
1813 | ||
1814 | status = nfs_ok; | |
1815 | ||
1816 | dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n", | |
1817 | stp->st_stateid.si_boot, stp->st_stateid.si_stateownerid, | |
1818 | stp->st_stateid.si_fileid, stp->st_stateid.si_generation); | |
1819 | out: | |
13cd2184 N |
1820 | if (fp) |
1821 | put_nfs4_file(fp); | |
37515177 N |
1822 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
1823 | nfs4_set_claim_prev(open); | |
1da177e4 LT |
1824 | /* |
1825 | * To finish the open response, we just need to set the rflags. | |
1826 | */ | |
1827 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
1828 | if (!open->op_stateowner->so_confirmed) | |
1829 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; | |
1830 | ||
1831 | return status; | |
1832 | } | |
1833 | ||
58da282b | 1834 | static struct workqueue_struct *laundry_wq; |
c4028958 DH |
1835 | static void laundromat_main(struct work_struct *); |
1836 | static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); | |
1da177e4 | 1837 | |
b37ad28b | 1838 | __be32 |
b591480b BF |
1839 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
1840 | clientid_t *clid) | |
1da177e4 LT |
1841 | { |
1842 | struct nfs4_client *clp; | |
b37ad28b | 1843 | __be32 status; |
1da177e4 LT |
1844 | |
1845 | nfs4_lock_state(); | |
1846 | dprintk("process_renew(%08x/%08x): starting\n", | |
1847 | clid->cl_boot, clid->cl_id); | |
1848 | status = nfserr_stale_clientid; | |
1849 | if (STALE_CLIENTID(clid)) | |
1850 | goto out; | |
1851 | clp = find_confirmed_client(clid); | |
1852 | status = nfserr_expired; | |
1853 | if (clp == NULL) { | |
1854 | /* We assume the client took too long to RENEW. */ | |
1855 | dprintk("nfsd4_renew: clientid not found!\n"); | |
1856 | goto out; | |
1857 | } | |
1858 | renew_client(clp); | |
1859 | status = nfserr_cb_path_down; | |
ea1da636 | 1860 | if (!list_empty(&clp->cl_delegations) |
1da177e4 LT |
1861 | && !atomic_read(&clp->cl_callback.cb_set)) |
1862 | goto out; | |
1863 | status = nfs_ok; | |
1864 | out: | |
1865 | nfs4_unlock_state(); | |
1866 | return status; | |
1867 | } | |
1868 | ||
a76b4319 N |
1869 | static void |
1870 | end_grace(void) | |
1871 | { | |
1872 | dprintk("NFSD: end of grace period\n"); | |
c7b9a459 | 1873 | nfsd4_recdir_purge_old(); |
a76b4319 N |
1874 | in_grace = 0; |
1875 | } | |
1876 | ||
fd39ca9a | 1877 | static time_t |
1da177e4 LT |
1878 | nfs4_laundromat(void) |
1879 | { | |
1880 | struct nfs4_client *clp; | |
1881 | struct nfs4_stateowner *sop; | |
1882 | struct nfs4_delegation *dp; | |
1883 | struct list_head *pos, *next, reaplist; | |
1884 | time_t cutoff = get_seconds() - NFSD_LEASE_TIME; | |
1885 | time_t t, clientid_val = NFSD_LEASE_TIME; | |
1886 | time_t u, test_val = NFSD_LEASE_TIME; | |
1887 | ||
1888 | nfs4_lock_state(); | |
1889 | ||
1890 | dprintk("NFSD: laundromat service - starting\n"); | |
a76b4319 N |
1891 | if (in_grace) |
1892 | end_grace(); | |
1da177e4 LT |
1893 | list_for_each_safe(pos, next, &client_lru) { |
1894 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1895 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
1896 | t = clp->cl_time - cutoff; | |
1897 | if (clientid_val > t) | |
1898 | clientid_val = t; | |
1899 | break; | |
1900 | } | |
1901 | dprintk("NFSD: purging unused client (clientid %08x)\n", | |
1902 | clp->cl_clientid.cl_id); | |
c7b9a459 | 1903 | nfsd4_remove_clid_dir(clp); |
1da177e4 LT |
1904 | expire_client(clp); |
1905 | } | |
1906 | INIT_LIST_HEAD(&reaplist); | |
1907 | spin_lock(&recall_lock); | |
1908 | list_for_each_safe(pos, next, &del_recall_lru) { | |
1909 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
1910 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
1911 | u = dp->dl_time - cutoff; | |
1912 | if (test_val > u) | |
1913 | test_val = u; | |
1914 | break; | |
1915 | } | |
1916 | dprintk("NFSD: purging unused delegation dp %p, fp %p\n", | |
1917 | dp, dp->dl_flock); | |
1918 | list_move(&dp->dl_recall_lru, &reaplist); | |
1919 | } | |
1920 | spin_unlock(&recall_lock); | |
1921 | list_for_each_safe(pos, next, &reaplist) { | |
1922 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
1923 | list_del_init(&dp->dl_recall_lru); | |
1924 | unhash_delegation(dp); | |
1925 | } | |
1926 | test_val = NFSD_LEASE_TIME; | |
1927 | list_for_each_safe(pos, next, &close_lru) { | |
1928 | sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); | |
1929 | if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { | |
1930 | u = sop->so_time - cutoff; | |
1931 | if (test_val > u) | |
1932 | test_val = u; | |
1933 | break; | |
1934 | } | |
1935 | dprintk("NFSD: purging unused open stateowner (so_id %d)\n", | |
1936 | sop->so_id); | |
358dd55a | 1937 | release_stateowner(sop); |
1da177e4 LT |
1938 | } |
1939 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
1940 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
1941 | nfs4_unlock_state(); | |
1942 | return clientid_val; | |
1943 | } | |
1944 | ||
1945 | void | |
c4028958 | 1946 | laundromat_main(struct work_struct *not_used) |
1da177e4 LT |
1947 | { |
1948 | time_t t; | |
1949 | ||
1950 | t = nfs4_laundromat(); | |
1951 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); | |
58da282b | 1952 | queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); |
1da177e4 LT |
1953 | } |
1954 | ||
fd39ca9a | 1955 | static struct nfs4_stateowner * |
f8816512 N |
1956 | search_close_lru(u32 st_id, int flags) |
1957 | { | |
1da177e4 LT |
1958 | struct nfs4_stateowner *local = NULL; |
1959 | ||
1da177e4 LT |
1960 | if (flags & CLOSE_STATE) { |
1961 | list_for_each_entry(local, &close_lru, so_close_lru) { | |
1962 | if (local->so_id == st_id) | |
1963 | return local; | |
1964 | } | |
1965 | } | |
1966 | return NULL; | |
1967 | } | |
1968 | ||
1969 | static inline int | |
1970 | nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) | |
1971 | { | |
7eaa36e2 | 1972 | return fhp->fh_dentry->d_inode != stp->st_vfs_file->f_path.dentry->d_inode; |
1da177e4 LT |
1973 | } |
1974 | ||
1975 | static int | |
1976 | STALE_STATEID(stateid_t *stateid) | |
1977 | { | |
1978 | if (stateid->si_boot == boot_time) | |
1979 | return 0; | |
849823c5 | 1980 | dprintk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n", |
1da177e4 LT |
1981 | stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, |
1982 | stateid->si_generation); | |
1983 | return 1; | |
1984 | } | |
1985 | ||
1986 | static inline int | |
1987 | access_permit_read(unsigned long access_bmap) | |
1988 | { | |
1989 | return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || | |
1990 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || | |
1991 | test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); | |
1992 | } | |
1993 | ||
1994 | static inline int | |
1995 | access_permit_write(unsigned long access_bmap) | |
1996 | { | |
1997 | return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || | |
1998 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); | |
1999 | } | |
2000 | ||
2001 | static | |
b37ad28b | 2002 | __be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags) |
1da177e4 | 2003 | { |
b37ad28b | 2004 | __be32 status = nfserr_openmode; |
1da177e4 LT |
2005 | |
2006 | if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) | |
2007 | goto out; | |
2008 | if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) | |
2009 | goto out; | |
2010 | status = nfs_ok; | |
2011 | out: | |
2012 | return status; | |
2013 | } | |
2014 | ||
b37ad28b | 2015 | static inline __be32 |
1da177e4 LT |
2016 | check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) |
2017 | { | |
2018 | /* Trying to call delegreturn with a special stateid? Yuch: */ | |
2019 | if (!(flags & (RD_STATE | WR_STATE))) | |
2020 | return nfserr_bad_stateid; | |
2021 | else if (ONE_STATEID(stateid) && (flags & RD_STATE)) | |
2022 | return nfs_ok; | |
2023 | else if (nfs4_in_grace()) { | |
2024 | /* Answer in remaining cases depends on existance of | |
2025 | * conflicting state; so we must wait out the grace period. */ | |
2026 | return nfserr_grace; | |
2027 | } else if (flags & WR_STATE) | |
2028 | return nfs4_share_conflict(current_fh, | |
2029 | NFS4_SHARE_DENY_WRITE); | |
2030 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
2031 | return nfs4_share_conflict(current_fh, | |
2032 | NFS4_SHARE_DENY_READ); | |
2033 | } | |
2034 | ||
2035 | /* | |
2036 | * Allow READ/WRITE during grace period on recovered state only for files | |
2037 | * that are not able to provide mandatory locking. | |
2038 | */ | |
2039 | static inline int | |
2040 | io_during_grace_disallowed(struct inode *inode, int flags) | |
2041 | { | |
2042 | return nfs4_in_grace() && (flags & (RD_STATE | WR_STATE)) | |
2043 | && MANDATORY_LOCK(inode); | |
2044 | } | |
2045 | ||
2046 | /* | |
2047 | * Checks for stateid operations | |
2048 | */ | |
b37ad28b | 2049 | __be32 |
1da177e4 LT |
2050 | nfs4_preprocess_stateid_op(struct svc_fh *current_fh, stateid_t *stateid, int flags, struct file **filpp) |
2051 | { | |
2052 | struct nfs4_stateid *stp = NULL; | |
2053 | struct nfs4_delegation *dp = NULL; | |
2054 | stateid_t *stidp; | |
2055 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
b37ad28b | 2056 | __be32 status; |
1da177e4 LT |
2057 | |
2058 | dprintk("NFSD: preprocess_stateid_op: stateid = (%08x/%08x/%08x/%08x)\n", | |
2059 | stateid->si_boot, stateid->si_stateownerid, | |
2060 | stateid->si_fileid, stateid->si_generation); | |
2061 | if (filpp) | |
2062 | *filpp = NULL; | |
2063 | ||
2064 | if (io_during_grace_disallowed(ino, flags)) | |
2065 | return nfserr_grace; | |
2066 | ||
2067 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
2068 | return check_special_stateids(current_fh, stateid, flags); | |
2069 | ||
2070 | /* STALE STATEID */ | |
2071 | status = nfserr_stale_stateid; | |
2072 | if (STALE_STATEID(stateid)) | |
2073 | goto out; | |
2074 | ||
2075 | /* BAD STATEID */ | |
2076 | status = nfserr_bad_stateid; | |
2077 | if (!stateid->si_fileid) { /* delegation stateid */ | |
2078 | if(!(dp = find_delegation_stateid(ino, stateid))) { | |
2079 | dprintk("NFSD: delegation stateid not found\n"); | |
1da177e4 LT |
2080 | goto out; |
2081 | } | |
2082 | stidp = &dp->dl_stateid; | |
2083 | } else { /* open or lock stateid */ | |
2084 | if (!(stp = find_stateid(stateid, flags))) { | |
2085 | dprintk("NFSD: open or lock stateid not found\n"); | |
1da177e4 LT |
2086 | goto out; |
2087 | } | |
2088 | if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp)) | |
2089 | goto out; | |
2090 | if (!stp->st_stateowner->so_confirmed) | |
2091 | goto out; | |
2092 | stidp = &stp->st_stateid; | |
2093 | } | |
2094 | if (stateid->si_generation > stidp->si_generation) | |
2095 | goto out; | |
2096 | ||
2097 | /* OLD STATEID */ | |
2098 | status = nfserr_old_stateid; | |
2099 | if (stateid->si_generation < stidp->si_generation) | |
2100 | goto out; | |
2101 | if (stp) { | |
2102 | if ((status = nfs4_check_openmode(stp,flags))) | |
2103 | goto out; | |
2104 | renew_client(stp->st_stateowner->so_client); | |
2105 | if (filpp) | |
2106 | *filpp = stp->st_vfs_file; | |
2107 | } else if (dp) { | |
2108 | if ((status = nfs4_check_delegmode(dp, flags))) | |
2109 | goto out; | |
2110 | renew_client(dp->dl_client); | |
2111 | if (flags & DELEG_RET) | |
2112 | unhash_delegation(dp); | |
2113 | if (filpp) | |
2114 | *filpp = dp->dl_vfs_file; | |
2115 | } | |
2116 | status = nfs_ok; | |
2117 | out: | |
2118 | return status; | |
2119 | } | |
2120 | ||
4c4cd222 N |
2121 | static inline int |
2122 | setlkflg (int type) | |
2123 | { | |
2124 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
2125 | RD_STATE : WR_STATE; | |
2126 | } | |
1da177e4 LT |
2127 | |
2128 | /* | |
2129 | * Checks for sequence id mutating operations. | |
2130 | */ | |
b37ad28b | 2131 | static __be32 |
4c4cd222 | 2132 | 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 | 2133 | { |
1da177e4 LT |
2134 | struct nfs4_stateid *stp; |
2135 | struct nfs4_stateowner *sop; | |
2136 | ||
2137 | dprintk("NFSD: preprocess_seqid_op: seqid=%d " | |
2138 | "stateid = (%08x/%08x/%08x/%08x)\n", seqid, | |
2139 | stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, | |
2140 | stateid->si_generation); | |
3a4f98bb | 2141 | |
1da177e4 LT |
2142 | *stpp = NULL; |
2143 | *sopp = NULL; | |
2144 | ||
1da177e4 LT |
2145 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { |
2146 | printk("NFSD: preprocess_seqid_op: magic stateid!\n"); | |
3a4f98bb | 2147 | return nfserr_bad_stateid; |
1da177e4 LT |
2148 | } |
2149 | ||
1da177e4 | 2150 | if (STALE_STATEID(stateid)) |
3a4f98bb | 2151 | return nfserr_stale_stateid; |
1da177e4 LT |
2152 | /* |
2153 | * We return BAD_STATEID if filehandle doesn't match stateid, | |
2154 | * the confirmed flag is incorrecly set, or the generation | |
2155 | * number is incorrect. | |
1da177e4 | 2156 | */ |
f8816512 N |
2157 | stp = find_stateid(stateid, flags); |
2158 | if (stp == NULL) { | |
2159 | /* | |
2160 | * Also, we should make sure this isn't just the result of | |
2161 | * a replayed close: | |
2162 | */ | |
2163 | sop = search_close_lru(stateid->si_stateownerid, flags); | |
2164 | if (sop == NULL) | |
2165 | return nfserr_bad_stateid; | |
2166 | *sopp = sop; | |
2167 | goto check_replay; | |
2168 | } | |
1da177e4 | 2169 | |
4c4cd222 | 2170 | if (lock) { |
1da177e4 | 2171 | struct nfs4_stateowner *sop = stp->st_stateowner; |
4c4cd222 | 2172 | clientid_t *lockclid = &lock->v.new.clientid; |
1da177e4 | 2173 | struct nfs4_client *clp = sop->so_client; |
4c4cd222 | 2174 | int lkflg = 0; |
b37ad28b | 2175 | __be32 status; |
4c4cd222 N |
2176 | |
2177 | lkflg = setlkflg(lock->lk_type); | |
2178 | ||
2179 | if (lock->lk_is_new) { | |
2180 | if (!sop->so_is_open_owner) | |
2181 | return nfserr_bad_stateid; | |
2182 | if (!cmp_clid(&clp->cl_clientid, lockclid)) | |
2183 | return nfserr_bad_stateid; | |
2184 | /* stp is the open stateid */ | |
2185 | status = nfs4_check_openmode(stp, lkflg); | |
2186 | if (status) | |
2187 | return status; | |
2188 | } else { | |
2189 | /* stp is the lock stateid */ | |
2190 | status = nfs4_check_openmode(stp->st_openstp, lkflg); | |
2191 | if (status) | |
2192 | return status; | |
2193 | } | |
1da177e4 | 2194 | |
1da177e4 LT |
2195 | } |
2196 | ||
2197 | if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp)) { | |
2198 | printk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); | |
3a4f98bb | 2199 | return nfserr_bad_stateid; |
1da177e4 LT |
2200 | } |
2201 | ||
2202 | *stpp = stp; | |
2203 | *sopp = sop = stp->st_stateowner; | |
2204 | ||
2205 | /* | |
2206 | * We now validate the seqid and stateid generation numbers. | |
2207 | * For the moment, we ignore the possibility of | |
2208 | * generation number wraparound. | |
2209 | */ | |
bd9aac52 | 2210 | if (seqid != sop->so_seqid) |
1da177e4 LT |
2211 | goto check_replay; |
2212 | ||
3a4f98bb N |
2213 | if (sop->so_confirmed && flags & CONFIRM) { |
2214 | printk("NFSD: preprocess_seqid_op: expected" | |
2215 | " unconfirmed stateowner!\n"); | |
2216 | return nfserr_bad_stateid; | |
1da177e4 | 2217 | } |
3a4f98bb N |
2218 | if (!sop->so_confirmed && !(flags & CONFIRM)) { |
2219 | printk("NFSD: preprocess_seqid_op: stateowner not" | |
2220 | " confirmed yet!\n"); | |
2221 | return nfserr_bad_stateid; | |
1da177e4 LT |
2222 | } |
2223 | if (stateid->si_generation > stp->st_stateid.si_generation) { | |
2224 | printk("NFSD: preprocess_seqid_op: future stateid?!\n"); | |
3a4f98bb | 2225 | return nfserr_bad_stateid; |
1da177e4 LT |
2226 | } |
2227 | ||
1da177e4 LT |
2228 | if (stateid->si_generation < stp->st_stateid.si_generation) { |
2229 | printk("NFSD: preprocess_seqid_op: old stateid!\n"); | |
3a4f98bb | 2230 | return nfserr_old_stateid; |
1da177e4 | 2231 | } |
52fd004e | 2232 | renew_client(sop->so_client); |
3a4f98bb | 2233 | return nfs_ok; |
1da177e4 | 2234 | |
1da177e4 | 2235 | check_replay: |
bd9aac52 | 2236 | if (seqid == sop->so_seqid - 1) { |
849823c5 | 2237 | dprintk("NFSD: preprocess_seqid_op: retransmission?\n"); |
1da177e4 | 2238 | /* indicate replay to calling function */ |
a90b061c | 2239 | return nfserr_replay_me; |
1da177e4 | 2240 | } |
3a4f98bb N |
2241 | printk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n", |
2242 | sop->so_seqid, seqid); | |
2243 | *sopp = NULL; | |
2244 | return nfserr_bad_seqid; | |
1da177e4 LT |
2245 | } |
2246 | ||
b37ad28b | 2247 | __be32 |
ca364317 | 2248 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 2249 | struct nfsd4_open_confirm *oc) |
1da177e4 | 2250 | { |
b37ad28b | 2251 | __be32 status; |
1da177e4 LT |
2252 | struct nfs4_stateowner *sop; |
2253 | struct nfs4_stateid *stp; | |
2254 | ||
2255 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | |
ca364317 BF |
2256 | (int)cstate->current_fh.fh_dentry->d_name.len, |
2257 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 2258 | |
ca364317 | 2259 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
2260 | if (status) |
2261 | return status; | |
1da177e4 LT |
2262 | |
2263 | nfs4_lock_state(); | |
2264 | ||
ca364317 BF |
2265 | if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
2266 | oc->oc_seqid, &oc->oc_req_stateid, | |
1da177e4 LT |
2267 | CHECK_FH | CONFIRM | OPEN_STATE, |
2268 | &oc->oc_stateowner, &stp, NULL))) | |
2269 | goto out; | |
2270 | ||
2271 | sop = oc->oc_stateowner; | |
2272 | sop->so_confirmed = 1; | |
2273 | update_stateid(&stp->st_stateid); | |
2274 | memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2275 | dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d " | |
2276 | "stateid=(%08x/%08x/%08x/%08x)\n", oc->oc_seqid, | |
2277 | stp->st_stateid.si_boot, | |
2278 | stp->st_stateid.si_stateownerid, | |
2279 | stp->st_stateid.si_fileid, | |
2280 | stp->st_stateid.si_generation); | |
c7b9a459 N |
2281 | |
2282 | nfsd4_create_clid_dir(sop->so_client); | |
1da177e4 | 2283 | out: |
f2327d9a | 2284 | if (oc->oc_stateowner) { |
1da177e4 | 2285 | nfs4_get_stateowner(oc->oc_stateowner); |
a4f1706a | 2286 | cstate->replay_owner = oc->oc_stateowner; |
f2327d9a | 2287 | } |
1da177e4 LT |
2288 | nfs4_unlock_state(); |
2289 | return status; | |
2290 | } | |
2291 | ||
2292 | ||
2293 | /* | |
2294 | * unset all bits in union bitmap (bmap) that | |
2295 | * do not exist in share (from successful OPEN_DOWNGRADE) | |
2296 | */ | |
2297 | static void | |
2298 | reset_union_bmap_access(unsigned long access, unsigned long *bmap) | |
2299 | { | |
2300 | int i; | |
2301 | for (i = 1; i < 4; i++) { | |
2302 | if ((i & access) != i) | |
2303 | __clear_bit(i, bmap); | |
2304 | } | |
2305 | } | |
2306 | ||
2307 | static void | |
2308 | reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) | |
2309 | { | |
2310 | int i; | |
2311 | for (i = 0; i < 4; i++) { | |
2312 | if ((i & deny) != i) | |
2313 | __clear_bit(i, bmap); | |
2314 | } | |
2315 | } | |
2316 | ||
b37ad28b | 2317 | __be32 |
ca364317 BF |
2318 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
2319 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 2320 | struct nfsd4_open_downgrade *od) |
1da177e4 | 2321 | { |
b37ad28b | 2322 | __be32 status; |
1da177e4 LT |
2323 | struct nfs4_stateid *stp; |
2324 | unsigned int share_access; | |
2325 | ||
2326 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | |
ca364317 BF |
2327 | (int)cstate->current_fh.fh_dentry->d_name.len, |
2328 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 2329 | |
ba5a6a19 BF |
2330 | if (!access_valid(od->od_share_access) |
2331 | || !deny_valid(od->od_share_deny)) | |
1da177e4 LT |
2332 | return nfserr_inval; |
2333 | ||
2334 | nfs4_lock_state(); | |
ca364317 BF |
2335 | if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
2336 | od->od_seqid, | |
1da177e4 LT |
2337 | &od->od_stateid, |
2338 | CHECK_FH | OPEN_STATE, | |
2339 | &od->od_stateowner, &stp, NULL))) | |
2340 | goto out; | |
2341 | ||
2342 | status = nfserr_inval; | |
2343 | if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { | |
2344 | dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
2345 | stp->st_access_bmap, od->od_share_access); | |
2346 | goto out; | |
2347 | } | |
2348 | if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { | |
2349 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", | |
2350 | stp->st_deny_bmap, od->od_share_deny); | |
2351 | goto out; | |
2352 | } | |
2353 | set_access(&share_access, stp->st_access_bmap); | |
2354 | nfs4_file_downgrade(stp->st_vfs_file, | |
2355 | share_access & ~od->od_share_access); | |
2356 | ||
2357 | reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap); | |
2358 | reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); | |
2359 | ||
2360 | update_stateid(&stp->st_stateid); | |
2361 | memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2362 | status = nfs_ok; | |
2363 | out: | |
f2327d9a | 2364 | if (od->od_stateowner) { |
1da177e4 | 2365 | nfs4_get_stateowner(od->od_stateowner); |
a4f1706a | 2366 | cstate->replay_owner = od->od_stateowner; |
f2327d9a | 2367 | } |
1da177e4 LT |
2368 | nfs4_unlock_state(); |
2369 | return status; | |
2370 | } | |
2371 | ||
2372 | /* | |
2373 | * nfs4_unlock_state() called after encode | |
2374 | */ | |
b37ad28b | 2375 | __be32 |
ca364317 | 2376 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 2377 | struct nfsd4_close *close) |
1da177e4 | 2378 | { |
b37ad28b | 2379 | __be32 status; |
1da177e4 LT |
2380 | struct nfs4_stateid *stp; |
2381 | ||
2382 | dprintk("NFSD: nfsd4_close on file %.*s\n", | |
ca364317 BF |
2383 | (int)cstate->current_fh.fh_dentry->d_name.len, |
2384 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 LT |
2385 | |
2386 | nfs4_lock_state(); | |
2387 | /* check close_lru for replay */ | |
ca364317 BF |
2388 | if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
2389 | close->cl_seqid, | |
1da177e4 LT |
2390 | &close->cl_stateid, |
2391 | CHECK_FH | OPEN_STATE | CLOSE_STATE, | |
2392 | &close->cl_stateowner, &stp, NULL))) | |
2393 | goto out; | |
1da177e4 LT |
2394 | status = nfs_ok; |
2395 | update_stateid(&stp->st_stateid); | |
2396 | memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2397 | ||
04ef5954 BF |
2398 | /* release_stateid() calls nfsd_close() if needed */ |
2399 | release_stateid(stp, OPEN_STATE); | |
2400 | ||
2401 | /* place unused nfs4_stateowners on so_close_lru list to be | |
2402 | * released by the laundromat service after the lease period | |
2403 | * to enable us to handle CLOSE replay | |
2404 | */ | |
2405 | if (list_empty(&close->cl_stateowner->so_stateids)) | |
2406 | move_to_close_lru(close->cl_stateowner); | |
1da177e4 | 2407 | out: |
f2327d9a | 2408 | if (close->cl_stateowner) { |
1da177e4 | 2409 | nfs4_get_stateowner(close->cl_stateowner); |
a4f1706a | 2410 | cstate->replay_owner = close->cl_stateowner; |
f2327d9a | 2411 | } |
1da177e4 LT |
2412 | nfs4_unlock_state(); |
2413 | return status; | |
2414 | } | |
2415 | ||
b37ad28b | 2416 | __be32 |
ca364317 BF |
2417 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2418 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 2419 | { |
b37ad28b | 2420 | __be32 status; |
1da177e4 | 2421 | |
ca364317 | 2422 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 LT |
2423 | goto out; |
2424 | ||
2425 | nfs4_lock_state(); | |
ca364317 BF |
2426 | status = nfs4_preprocess_stateid_op(&cstate->current_fh, |
2427 | &dr->dr_stateid, DELEG_RET, NULL); | |
1da177e4 LT |
2428 | nfs4_unlock_state(); |
2429 | out: | |
2430 | return status; | |
2431 | } | |
2432 | ||
2433 | ||
2434 | /* | |
2435 | * Lock owner state (byte-range locks) | |
2436 | */ | |
2437 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) | |
2438 | #define LOCK_HASH_BITS 8 | |
2439 | #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) | |
2440 | #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) | |
2441 | ||
2442 | #define lockownerid_hashval(id) \ | |
2443 | ((id) & LOCK_HASH_MASK) | |
2444 | ||
2445 | static inline unsigned int | |
2446 | lock_ownerstr_hashval(struct inode *inode, u32 cl_id, | |
2447 | struct xdr_netobj *ownername) | |
2448 | { | |
2449 | return (file_hashval(inode) + cl_id | |
2450 | + opaque_hashval(ownername->data, ownername->len)) | |
2451 | & LOCK_HASH_MASK; | |
2452 | } | |
2453 | ||
2454 | static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; | |
2455 | static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; | |
2456 | static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; | |
2457 | ||
fd39ca9a | 2458 | static struct nfs4_stateid * |
1da177e4 LT |
2459 | find_stateid(stateid_t *stid, int flags) |
2460 | { | |
2461 | struct nfs4_stateid *local = NULL; | |
2462 | u32 st_id = stid->si_stateownerid; | |
2463 | u32 f_id = stid->si_fileid; | |
2464 | unsigned int hashval; | |
2465 | ||
2466 | dprintk("NFSD: find_stateid flags 0x%x\n",flags); | |
2467 | if ((flags & LOCK_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) { | |
2468 | hashval = stateid_hashval(st_id, f_id); | |
2469 | list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { | |
2470 | if ((local->st_stateid.si_stateownerid == st_id) && | |
2471 | (local->st_stateid.si_fileid == f_id)) | |
2472 | return local; | |
2473 | } | |
2474 | } | |
2475 | if ((flags & OPEN_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) { | |
2476 | hashval = stateid_hashval(st_id, f_id); | |
2477 | list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { | |
2478 | if ((local->st_stateid.si_stateownerid == st_id) && | |
2479 | (local->st_stateid.si_fileid == f_id)) | |
2480 | return local; | |
2481 | } | |
849823c5 | 2482 | } |
1da177e4 LT |
2483 | return NULL; |
2484 | } | |
2485 | ||
2486 | static struct nfs4_delegation * | |
2487 | find_delegation_stateid(struct inode *ino, stateid_t *stid) | |
2488 | { | |
13cd2184 N |
2489 | struct nfs4_file *fp; |
2490 | struct nfs4_delegation *dl; | |
1da177e4 LT |
2491 | |
2492 | dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n", | |
2493 | stid->si_boot, stid->si_stateownerid, | |
2494 | stid->si_fileid, stid->si_generation); | |
2495 | ||
1da177e4 | 2496 | fp = find_file(ino); |
13cd2184 N |
2497 | if (!fp) |
2498 | return NULL; | |
2499 | dl = find_delegation_file(fp, stid); | |
2500 | put_nfs4_file(fp); | |
2501 | return dl; | |
1da177e4 LT |
2502 | } |
2503 | ||
2504 | /* | |
2505 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
2506 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
2507 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
2508 | * locking, this prevents us from being completely protocol-compliant. The | |
2509 | * real solution to this problem is to start using unsigned file offsets in | |
2510 | * the VFS, but this is a very deep change! | |
2511 | */ | |
2512 | static inline void | |
2513 | nfs4_transform_lock_offset(struct file_lock *lock) | |
2514 | { | |
2515 | if (lock->fl_start < 0) | |
2516 | lock->fl_start = OFFSET_MAX; | |
2517 | if (lock->fl_end < 0) | |
2518 | lock->fl_end = OFFSET_MAX; | |
2519 | } | |
2520 | ||
d5b9026a N |
2521 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
2522 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
e465a77f | 2523 | static struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 2524 | }; |
1da177e4 LT |
2525 | |
2526 | static inline void | |
2527 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
2528 | { | |
d5b9026a N |
2529 | struct nfs4_stateowner *sop; |
2530 | unsigned int hval; | |
1da177e4 | 2531 | |
d5b9026a N |
2532 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
2533 | sop = (struct nfs4_stateowner *) fl->fl_owner; | |
2534 | hval = lockownerid_hashval(sop->so_id); | |
1da177e4 LT |
2535 | kref_get(&sop->so_ref); |
2536 | deny->ld_sop = sop; | |
2537 | deny->ld_clientid = sop->so_client->cl_clientid; | |
d5b9026a N |
2538 | } else { |
2539 | deny->ld_sop = NULL; | |
2540 | deny->ld_clientid.cl_boot = 0; | |
2541 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
2542 | } |
2543 | deny->ld_start = fl->fl_start; | |
2544 | deny->ld_length = ~(u64)0; | |
2545 | if (fl->fl_end != ~(u64)0) | |
2546 | deny->ld_length = fl->fl_end - fl->fl_start + 1; | |
2547 | deny->ld_type = NFS4_READ_LT; | |
2548 | if (fl->fl_type != F_RDLCK) | |
2549 | deny->ld_type = NFS4_WRITE_LT; | |
2550 | } | |
2551 | ||
1da177e4 LT |
2552 | static struct nfs4_stateowner * |
2553 | find_lockstateowner_str(struct inode *inode, clientid_t *clid, | |
2554 | struct xdr_netobj *owner) | |
2555 | { | |
2556 | unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); | |
2557 | struct nfs4_stateowner *op; | |
2558 | ||
2559 | list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { | |
2560 | if (cmp_owner_str(op, owner, clid)) | |
2561 | return op; | |
2562 | } | |
2563 | return NULL; | |
2564 | } | |
2565 | ||
2566 | /* | |
2567 | * Alloc a lock owner structure. | |
2568 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
2569 | * occured. | |
2570 | * | |
2571 | * strhashval = lock_ownerstr_hashval | |
1da177e4 LT |
2572 | */ |
2573 | ||
2574 | static struct nfs4_stateowner * | |
2575 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { | |
2576 | struct nfs4_stateowner *sop; | |
2577 | struct nfs4_replay *rp; | |
2578 | unsigned int idhashval; | |
2579 | ||
2580 | if (!(sop = alloc_stateowner(&lock->lk_new_owner))) | |
2581 | return NULL; | |
2582 | idhashval = lockownerid_hashval(current_ownerid); | |
2583 | INIT_LIST_HEAD(&sop->so_idhash); | |
2584 | INIT_LIST_HEAD(&sop->so_strhash); | |
2585 | INIT_LIST_HEAD(&sop->so_perclient); | |
ea1da636 N |
2586 | INIT_LIST_HEAD(&sop->so_stateids); |
2587 | INIT_LIST_HEAD(&sop->so_perstateid); | |
1da177e4 LT |
2588 | INIT_LIST_HEAD(&sop->so_close_lru); /* not used */ |
2589 | sop->so_time = 0; | |
2590 | list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); | |
2591 | list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); | |
ea1da636 | 2592 | list_add(&sop->so_perstateid, &open_stp->st_lockowners); |
1da177e4 LT |
2593 | sop->so_is_open_owner = 0; |
2594 | sop->so_id = current_ownerid++; | |
2595 | sop->so_client = clp; | |
b59e3c0e NB |
2596 | /* It is the openowner seqid that will be incremented in encode in the |
2597 | * case of new lockowners; so increment the lock seqid manually: */ | |
2598 | sop->so_seqid = lock->lk_new_lock_seqid + 1; | |
1da177e4 LT |
2599 | sop->so_confirmed = 1; |
2600 | rp = &sop->so_replay; | |
de1ae286 | 2601 | rp->rp_status = nfserr_serverfault; |
1da177e4 LT |
2602 | rp->rp_buflen = 0; |
2603 | rp->rp_buf = rp->rp_ibuf; | |
2604 | return sop; | |
2605 | } | |
2606 | ||
fd39ca9a | 2607 | static struct nfs4_stateid * |
1da177e4 LT |
2608 | alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) |
2609 | { | |
2610 | struct nfs4_stateid *stp; | |
2611 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); | |
2612 | ||
5ac049ac N |
2613 | stp = nfs4_alloc_stateid(); |
2614 | if (stp == NULL) | |
1da177e4 LT |
2615 | goto out; |
2616 | INIT_LIST_HEAD(&stp->st_hash); | |
2617 | INIT_LIST_HEAD(&stp->st_perfile); | |
ea1da636 N |
2618 | INIT_LIST_HEAD(&stp->st_perstateowner); |
2619 | INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ | |
1da177e4 | 2620 | list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); |
8beefa24 | 2621 | list_add(&stp->st_perfile, &fp->fi_stateids); |
ea1da636 | 2622 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
1da177e4 | 2623 | stp->st_stateowner = sop; |
13cd2184 | 2624 | get_nfs4_file(fp); |
1da177e4 LT |
2625 | stp->st_file = fp; |
2626 | stp->st_stateid.si_boot = boot_time; | |
2627 | stp->st_stateid.si_stateownerid = sop->so_id; | |
2628 | stp->st_stateid.si_fileid = fp->fi_id; | |
2629 | stp->st_stateid.si_generation = 0; | |
2630 | stp->st_vfs_file = open_stp->st_vfs_file; /* FIXME refcount?? */ | |
2631 | stp->st_access_bmap = open_stp->st_access_bmap; | |
2632 | stp->st_deny_bmap = open_stp->st_deny_bmap; | |
4c4cd222 | 2633 | stp->st_openstp = open_stp; |
1da177e4 LT |
2634 | |
2635 | out: | |
2636 | return stp; | |
2637 | } | |
2638 | ||
fd39ca9a | 2639 | static int |
1da177e4 LT |
2640 | check_lock_length(u64 offset, u64 length) |
2641 | { | |
2642 | return ((length == 0) || ((length != ~(u64)0) && | |
2643 | LOFF_OVERFLOW(offset, length))); | |
2644 | } | |
2645 | ||
2646 | /* | |
2647 | * LOCK operation | |
2648 | */ | |
b37ad28b | 2649 | __be32 |
ca364317 | 2650 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 2651 | struct nfsd4_lock *lock) |
1da177e4 | 2652 | { |
3e9e3dbe | 2653 | struct nfs4_stateowner *open_sop = NULL; |
b59e3c0e | 2654 | struct nfs4_stateowner *lock_sop = NULL; |
1da177e4 LT |
2655 | struct nfs4_stateid *lock_stp; |
2656 | struct file *filp; | |
2657 | struct file_lock file_lock; | |
8dc7c311 | 2658 | struct file_lock conflock; |
b37ad28b | 2659 | __be32 status = 0; |
1da177e4 | 2660 | unsigned int strhashval; |
150b3934 | 2661 | unsigned int cmd; |
b8dd7b9a | 2662 | int err; |
1da177e4 LT |
2663 | |
2664 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
2665 | (long long) lock->lk_offset, | |
2666 | (long long) lock->lk_length); | |
2667 | ||
1da177e4 LT |
2668 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
2669 | return nfserr_inval; | |
2670 | ||
ca364317 BF |
2671 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
2672 | S_IFREG, MAY_LOCK))) { | |
a6f6ef2f AA |
2673 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
2674 | return status; | |
2675 | } | |
2676 | ||
1da177e4 LT |
2677 | nfs4_lock_state(); |
2678 | ||
2679 | if (lock->lk_is_new) { | |
893f8770 N |
2680 | /* |
2681 | * Client indicates that this is a new lockowner. | |
2682 | * Use open owner and open stateid to create lock owner and | |
2683 | * lock stateid. | |
2684 | */ | |
1da177e4 LT |
2685 | struct nfs4_stateid *open_stp = NULL; |
2686 | struct nfs4_file *fp; | |
2687 | ||
2688 | status = nfserr_stale_clientid; | |
849823c5 | 2689 | if (STALE_CLIENTID(&lock->lk_new_clientid)) |
1da177e4 | 2690 | goto out; |
1da177e4 | 2691 | |
1da177e4 | 2692 | /* validate and update open stateid and open seqid */ |
ca364317 | 2693 | status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
1da177e4 LT |
2694 | lock->lk_new_open_seqid, |
2695 | &lock->lk_new_open_stateid, | |
2696 | CHECK_FH | OPEN_STATE, | |
3a65588a | 2697 | &lock->lk_replay_owner, &open_stp, |
b59e3c0e | 2698 | lock); |
37515177 | 2699 | if (status) |
1da177e4 | 2700 | goto out; |
3a65588a | 2701 | open_sop = lock->lk_replay_owner; |
1da177e4 LT |
2702 | /* create lockowner and lock stateid */ |
2703 | fp = open_stp->st_file; | |
2704 | strhashval = lock_ownerstr_hashval(fp->fi_inode, | |
2705 | open_sop->so_client->cl_clientid.cl_id, | |
2706 | &lock->v.new.owner); | |
3e9e3dbe N |
2707 | /* XXX: Do we need to check for duplicate stateowners on |
2708 | * the same file, or should they just be allowed (and | |
2709 | * create new stateids)? */ | |
1da177e4 | 2710 | status = nfserr_resource; |
b59e3c0e NB |
2711 | lock_sop = alloc_init_lock_stateowner(strhashval, |
2712 | open_sop->so_client, open_stp, lock); | |
2713 | if (lock_sop == NULL) | |
1da177e4 | 2714 | goto out; |
b59e3c0e | 2715 | lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); |
8a280510 | 2716 | if (lock_stp == NULL) |
1da177e4 | 2717 | goto out; |
1da177e4 LT |
2718 | } else { |
2719 | /* lock (lock owner + lock stateid) already exists */ | |
ca364317 | 2720 | status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
1da177e4 LT |
2721 | lock->lk_old_lock_seqid, |
2722 | &lock->lk_old_lock_stateid, | |
2723 | CHECK_FH | LOCK_STATE, | |
3a65588a | 2724 | &lock->lk_replay_owner, &lock_stp, lock); |
1da177e4 LT |
2725 | if (status) |
2726 | goto out; | |
3a65588a | 2727 | lock_sop = lock->lk_replay_owner; |
1da177e4 | 2728 | } |
3a65588a | 2729 | /* lock->lk_replay_owner and lock_stp have been created or found */ |
1da177e4 LT |
2730 | filp = lock_stp->st_vfs_file; |
2731 | ||
0dd395dc N |
2732 | status = nfserr_grace; |
2733 | if (nfs4_in_grace() && !lock->lk_reclaim) | |
2734 | goto out; | |
2735 | status = nfserr_no_grace; | |
2736 | if (!nfs4_in_grace() && lock->lk_reclaim) | |
2737 | goto out; | |
2738 | ||
1da177e4 LT |
2739 | locks_init_lock(&file_lock); |
2740 | switch (lock->lk_type) { | |
2741 | case NFS4_READ_LT: | |
2742 | case NFS4_READW_LT: | |
2743 | file_lock.fl_type = F_RDLCK; | |
150b3934 | 2744 | cmd = F_SETLK; |
1da177e4 LT |
2745 | break; |
2746 | case NFS4_WRITE_LT: | |
2747 | case NFS4_WRITEW_LT: | |
2748 | file_lock.fl_type = F_WRLCK; | |
150b3934 | 2749 | cmd = F_SETLK; |
1da177e4 LT |
2750 | break; |
2751 | default: | |
2752 | status = nfserr_inval; | |
2753 | goto out; | |
2754 | } | |
b59e3c0e | 2755 | file_lock.fl_owner = (fl_owner_t)lock_sop; |
1da177e4 LT |
2756 | file_lock.fl_pid = current->tgid; |
2757 | file_lock.fl_file = filp; | |
2758 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 2759 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
2760 | |
2761 | file_lock.fl_start = lock->lk_offset; | |
2762 | if ((lock->lk_length == ~(u64)0) || | |
2763 | LOFF_OVERFLOW(lock->lk_offset, lock->lk_length)) | |
2764 | file_lock.fl_end = ~(u64)0; | |
2765 | else | |
2766 | file_lock.fl_end = lock->lk_offset + lock->lk_length - 1; | |
2767 | nfs4_transform_lock_offset(&file_lock); | |
2768 | ||
2769 | /* | |
2770 | * Try to lock the file in the VFS. | |
2771 | * Note: locks.c uses the BKL to protect the inode's lock list. | |
2772 | */ | |
2773 | ||
eb76b3fd AA |
2774 | /* XXX?: Just to divert the locks_release_private at the start of |
2775 | * locks_copy_lock: */ | |
150b3934 | 2776 | locks_init_lock(&conflock); |
fd85b817 | 2777 | err = vfs_lock_file(filp, cmd, &file_lock, &conflock); |
b8dd7b9a | 2778 | switch (-err) { |
1da177e4 LT |
2779 | case 0: /* success! */ |
2780 | update_stateid(&lock_stp->st_stateid); | |
2781 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, | |
2782 | sizeof(stateid_t)); | |
b8dd7b9a | 2783 | status = 0; |
eb76b3fd AA |
2784 | break; |
2785 | case (EAGAIN): /* conflock holds conflicting lock */ | |
2786 | status = nfserr_denied; | |
2787 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
2788 | nfs4_set_lock_denied(&conflock, &lock->lk_denied); | |
2789 | break; | |
1da177e4 LT |
2790 | case (EDEADLK): |
2791 | status = nfserr_deadlock; | |
eb76b3fd | 2792 | break; |
1da177e4 | 2793 | default: |
fd85b817 | 2794 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
eb76b3fd AA |
2795 | status = nfserr_resource; |
2796 | break; | |
1da177e4 | 2797 | } |
1da177e4 | 2798 | out: |
8a280510 BF |
2799 | if (status && lock->lk_is_new && lock_sop) |
2800 | release_stateowner(lock_sop); | |
3a65588a BF |
2801 | if (lock->lk_replay_owner) { |
2802 | nfs4_get_stateowner(lock->lk_replay_owner); | |
a4f1706a | 2803 | cstate->replay_owner = lock->lk_replay_owner; |
f2327d9a | 2804 | } |
1da177e4 LT |
2805 | nfs4_unlock_state(); |
2806 | return status; | |
2807 | } | |
2808 | ||
2809 | /* | |
2810 | * LOCKT operation | |
2811 | */ | |
b37ad28b | 2812 | __be32 |
ca364317 BF |
2813 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2814 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
2815 | { |
2816 | struct inode *inode; | |
2817 | struct file file; | |
2818 | struct file_lock file_lock; | |
fd85b817 | 2819 | int error; |
b37ad28b | 2820 | __be32 status; |
1da177e4 LT |
2821 | |
2822 | if (nfs4_in_grace()) | |
2823 | return nfserr_grace; | |
2824 | ||
2825 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
2826 | return nfserr_inval; | |
2827 | ||
2828 | lockt->lt_stateowner = NULL; | |
2829 | nfs4_lock_state(); | |
2830 | ||
2831 | status = nfserr_stale_clientid; | |
849823c5 | 2832 | if (STALE_CLIENTID(&lockt->lt_clientid)) |
1da177e4 | 2833 | goto out; |
1da177e4 | 2834 | |
ca364317 | 2835 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) { |
849823c5 | 2836 | dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n"); |
1da177e4 LT |
2837 | if (status == nfserr_symlink) |
2838 | status = nfserr_inval; | |
2839 | goto out; | |
2840 | } | |
2841 | ||
ca364317 | 2842 | inode = cstate->current_fh.fh_dentry->d_inode; |
1da177e4 LT |
2843 | locks_init_lock(&file_lock); |
2844 | switch (lockt->lt_type) { | |
2845 | case NFS4_READ_LT: | |
2846 | case NFS4_READW_LT: | |
2847 | file_lock.fl_type = F_RDLCK; | |
2848 | break; | |
2849 | case NFS4_WRITE_LT: | |
2850 | case NFS4_WRITEW_LT: | |
2851 | file_lock.fl_type = F_WRLCK; | |
2852 | break; | |
2853 | default: | |
2854 | printk("NFSD: nfs4_lockt: bad lock type!\n"); | |
2855 | status = nfserr_inval; | |
2856 | goto out; | |
2857 | } | |
2858 | ||
2859 | lockt->lt_stateowner = find_lockstateowner_str(inode, | |
2860 | &lockt->lt_clientid, &lockt->lt_owner); | |
2861 | if (lockt->lt_stateowner) | |
2862 | file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; | |
2863 | file_lock.fl_pid = current->tgid; | |
2864 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 2865 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
2866 | |
2867 | file_lock.fl_start = lockt->lt_offset; | |
2868 | if ((lockt->lt_length == ~(u64)0) || LOFF_OVERFLOW(lockt->lt_offset, lockt->lt_length)) | |
2869 | file_lock.fl_end = ~(u64)0; | |
2870 | else | |
2871 | file_lock.fl_end = lockt->lt_offset + lockt->lt_length - 1; | |
2872 | ||
2873 | nfs4_transform_lock_offset(&file_lock); | |
2874 | ||
fd85b817 | 2875 | /* vfs_test_lock uses the struct file _only_ to resolve the inode. |
1da177e4 | 2876 | * since LOCKT doesn't require an OPEN, and therefore a struct |
fd85b817 | 2877 | * file may not exist, pass vfs_test_lock a struct file with |
1da177e4 LT |
2878 | * only the dentry:inode set. |
2879 | */ | |
2880 | memset(&file, 0, sizeof (struct file)); | |
ca364317 | 2881 | file.f_path.dentry = cstate->current_fh.fh_dentry; |
1da177e4 LT |
2882 | |
2883 | status = nfs_ok; | |
fd85b817 ME |
2884 | error = vfs_test_lock(&file, &file_lock); |
2885 | if (error) { | |
2886 | status = nfserrno(error); | |
2887 | goto out; | |
2888 | } | |
9d6a8c5c | 2889 | if (file_lock.fl_type != F_UNLCK) { |
1da177e4 | 2890 | status = nfserr_denied; |
9d6a8c5c | 2891 | nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); |
1da177e4 LT |
2892 | } |
2893 | out: | |
2894 | nfs4_unlock_state(); | |
2895 | return status; | |
2896 | } | |
2897 | ||
b37ad28b | 2898 | __be32 |
ca364317 | 2899 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 2900 | struct nfsd4_locku *locku) |
1da177e4 LT |
2901 | { |
2902 | struct nfs4_stateid *stp; | |
2903 | struct file *filp = NULL; | |
2904 | struct file_lock file_lock; | |
b37ad28b | 2905 | __be32 status; |
b8dd7b9a | 2906 | int err; |
1da177e4 LT |
2907 | |
2908 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", | |
2909 | (long long) locku->lu_offset, | |
2910 | (long long) locku->lu_length); | |
2911 | ||
2912 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
2913 | return nfserr_inval; | |
2914 | ||
2915 | nfs4_lock_state(); | |
2916 | ||
ca364317 | 2917 | if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
1da177e4 LT |
2918 | locku->lu_seqid, |
2919 | &locku->lu_stateid, | |
2920 | CHECK_FH | LOCK_STATE, | |
2921 | &locku->lu_stateowner, &stp, NULL))) | |
2922 | goto out; | |
2923 | ||
2924 | filp = stp->st_vfs_file; | |
2925 | BUG_ON(!filp); | |
2926 | locks_init_lock(&file_lock); | |
2927 | file_lock.fl_type = F_UNLCK; | |
2928 | file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; | |
2929 | file_lock.fl_pid = current->tgid; | |
2930 | file_lock.fl_file = filp; | |
2931 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 2932 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
2933 | file_lock.fl_start = locku->lu_offset; |
2934 | ||
2935 | if ((locku->lu_length == ~(u64)0) || LOFF_OVERFLOW(locku->lu_offset, locku->lu_length)) | |
2936 | file_lock.fl_end = ~(u64)0; | |
2937 | else | |
2938 | file_lock.fl_end = locku->lu_offset + locku->lu_length - 1; | |
2939 | nfs4_transform_lock_offset(&file_lock); | |
2940 | ||
2941 | /* | |
2942 | * Try to unlock the file in the VFS. | |
2943 | */ | |
fd85b817 | 2944 | err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); |
b8dd7b9a | 2945 | if (err) { |
fd85b817 | 2946 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
2947 | goto out_nfserr; |
2948 | } | |
2949 | /* | |
2950 | * OK, unlock succeeded; the only thing left to do is update the stateid. | |
2951 | */ | |
2952 | update_stateid(&stp->st_stateid); | |
2953 | memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2954 | ||
2955 | out: | |
f2327d9a | 2956 | if (locku->lu_stateowner) { |
1da177e4 | 2957 | nfs4_get_stateowner(locku->lu_stateowner); |
a4f1706a | 2958 | cstate->replay_owner = locku->lu_stateowner; |
f2327d9a | 2959 | } |
1da177e4 LT |
2960 | nfs4_unlock_state(); |
2961 | return status; | |
2962 | ||
2963 | out_nfserr: | |
b8dd7b9a | 2964 | status = nfserrno(err); |
1da177e4 LT |
2965 | goto out; |
2966 | } | |
2967 | ||
2968 | /* | |
2969 | * returns | |
2970 | * 1: locks held by lockowner | |
2971 | * 0: no locks held by lockowner | |
2972 | */ | |
2973 | static int | |
2974 | check_for_locks(struct file *filp, struct nfs4_stateowner *lowner) | |
2975 | { | |
2976 | struct file_lock **flpp; | |
7eaa36e2 | 2977 | struct inode *inode = filp->f_path.dentry->d_inode; |
1da177e4 LT |
2978 | int status = 0; |
2979 | ||
2980 | lock_kernel(); | |
2981 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { | |
796dadfd | 2982 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
2983 | status = 1; |
2984 | goto out; | |
796dadfd | 2985 | } |
1da177e4 LT |
2986 | } |
2987 | out: | |
2988 | unlock_kernel(); | |
2989 | return status; | |
2990 | } | |
2991 | ||
b37ad28b | 2992 | __be32 |
b591480b BF |
2993 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
2994 | struct nfsd4_compound_state *cstate, | |
2995 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
2996 | { |
2997 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe N |
2998 | struct nfs4_stateowner *sop; |
2999 | struct nfs4_stateid *stp; | |
1da177e4 | 3000 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe N |
3001 | struct list_head matches; |
3002 | int i; | |
b37ad28b | 3003 | __be32 status; |
1da177e4 LT |
3004 | |
3005 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
3006 | clid->cl_boot, clid->cl_id); | |
3007 | ||
3008 | /* XXX check for lease expiration */ | |
3009 | ||
3010 | status = nfserr_stale_clientid; | |
849823c5 | 3011 | if (STALE_CLIENTID(clid)) |
1da177e4 | 3012 | return status; |
1da177e4 LT |
3013 | |
3014 | nfs4_lock_state(); | |
3015 | ||
3e9e3dbe N |
3016 | status = nfserr_locks_held; |
3017 | /* XXX: we're doing a linear search through all the lockowners. | |
3018 | * Yipes! For now we'll just hope clients aren't really using | |
3019 | * release_lockowner much, but eventually we have to fix these | |
3020 | * data structures. */ | |
3021 | INIT_LIST_HEAD(&matches); | |
3022 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
3023 | list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { | |
3024 | if (!cmp_owner_str(sop, owner, clid)) | |
3025 | continue; | |
3026 | list_for_each_entry(stp, &sop->so_stateids, | |
3027 | st_perstateowner) { | |
3028 | if (check_for_locks(stp->st_vfs_file, sop)) | |
3029 | goto out; | |
3030 | /* Note: so_perclient unused for lockowners, | |
3031 | * so it's OK to fool with here. */ | |
3032 | list_add(&sop->so_perclient, &matches); | |
3033 | } | |
1da177e4 | 3034 | } |
3e9e3dbe N |
3035 | } |
3036 | /* Clients probably won't expect us to return with some (but not all) | |
3037 | * of the lockowner state released; so don't release any until all | |
3038 | * have been checked. */ | |
3039 | status = nfs_ok; | |
0fa822e4 N |
3040 | while (!list_empty(&matches)) { |
3041 | sop = list_entry(matches.next, struct nfs4_stateowner, | |
3042 | so_perclient); | |
3043 | /* unhash_stateowner deletes so_perclient only | |
3044 | * for openowners. */ | |
3045 | list_del(&sop->so_perclient); | |
3e9e3dbe | 3046 | release_stateowner(sop); |
1da177e4 LT |
3047 | } |
3048 | out: | |
3049 | nfs4_unlock_state(); | |
3050 | return status; | |
3051 | } | |
3052 | ||
3053 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 3054 | alloc_reclaim(void) |
1da177e4 | 3055 | { |
a55370a3 | 3056 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
3057 | } |
3058 | ||
c7b9a459 N |
3059 | int |
3060 | nfs4_has_reclaimed_state(const char *name) | |
3061 | { | |
3062 | unsigned int strhashval = clientstr_hashval(name); | |
3063 | struct nfs4_client *clp; | |
3064 | ||
3065 | clp = find_confirmed_client_by_str(name, strhashval); | |
3066 | return clp ? 1 : 0; | |
3067 | } | |
3068 | ||
1da177e4 LT |
3069 | /* |
3070 | * failure => all reset bets are off, nfserr_no_grace... | |
3071 | */ | |
190e4fbf N |
3072 | int |
3073 | nfs4_client_to_reclaim(const char *name) | |
1da177e4 LT |
3074 | { |
3075 | unsigned int strhashval; | |
3076 | struct nfs4_client_reclaim *crp = NULL; | |
3077 | ||
a55370a3 N |
3078 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
3079 | crp = alloc_reclaim(); | |
1da177e4 LT |
3080 | if (!crp) |
3081 | return 0; | |
a55370a3 | 3082 | strhashval = clientstr_hashval(name); |
1da177e4 LT |
3083 | INIT_LIST_HEAD(&crp->cr_strhash); |
3084 | list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); | |
a55370a3 | 3085 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
1da177e4 LT |
3086 | reclaim_str_hashtbl_size++; |
3087 | return 1; | |
3088 | } | |
3089 | ||
3090 | static void | |
3091 | nfs4_release_reclaim(void) | |
3092 | { | |
3093 | struct nfs4_client_reclaim *crp = NULL; | |
3094 | int i; | |
3095 | ||
1da177e4 LT |
3096 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
3097 | while (!list_empty(&reclaim_str_hashtbl[i])) { | |
3098 | crp = list_entry(reclaim_str_hashtbl[i].next, | |
3099 | struct nfs4_client_reclaim, cr_strhash); | |
3100 | list_del(&crp->cr_strhash); | |
1da177e4 LT |
3101 | kfree(crp); |
3102 | reclaim_str_hashtbl_size--; | |
3103 | } | |
3104 | } | |
3105 | BUG_ON(reclaim_str_hashtbl_size); | |
3106 | } | |
3107 | ||
3108 | /* | |
3109 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
fd39ca9a | 3110 | static struct nfs4_client_reclaim * |
1da177e4 LT |
3111 | nfs4_find_reclaim_client(clientid_t *clid) |
3112 | { | |
3113 | unsigned int strhashval; | |
3114 | struct nfs4_client *clp; | |
3115 | struct nfs4_client_reclaim *crp = NULL; | |
3116 | ||
3117 | ||
3118 | /* find clientid in conf_id_hashtbl */ | |
3119 | clp = find_confirmed_client(clid); | |
3120 | if (clp == NULL) | |
3121 | return NULL; | |
3122 | ||
a55370a3 N |
3123 | dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", |
3124 | clp->cl_name.len, clp->cl_name.data, | |
3125 | clp->cl_recdir); | |
1da177e4 LT |
3126 | |
3127 | /* find clp->cl_name in reclaim_str_hashtbl */ | |
a55370a3 | 3128 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 | 3129 | list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { |
a55370a3 | 3130 | if (same_name(crp->cr_recdir, clp->cl_recdir)) { |
1da177e4 LT |
3131 | return crp; |
3132 | } | |
3133 | } | |
3134 | return NULL; | |
3135 | } | |
3136 | ||
3137 | /* | |
3138 | * Called from OPEN. Look for clientid in reclaim list. | |
3139 | */ | |
b37ad28b | 3140 | __be32 |
1da177e4 LT |
3141 | nfs4_check_open_reclaim(clientid_t *clid) |
3142 | { | |
dfc83565 | 3143 | return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; |
1da177e4 LT |
3144 | } |
3145 | ||
ac4d8ff2 | 3146 | /* initialization to perform at module load time: */ |
1da177e4 | 3147 | |
ac4d8ff2 N |
3148 | void |
3149 | nfs4_state_init(void) | |
1da177e4 LT |
3150 | { |
3151 | int i; | |
1da177e4 | 3152 | |
1da177e4 LT |
3153 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
3154 | INIT_LIST_HEAD(&conf_id_hashtbl[i]); | |
3155 | INIT_LIST_HEAD(&conf_str_hashtbl[i]); | |
3156 | INIT_LIST_HEAD(&unconf_str_hashtbl[i]); | |
3157 | INIT_LIST_HEAD(&unconf_id_hashtbl[i]); | |
3158 | } | |
3159 | for (i = 0; i < FILE_HASH_SIZE; i++) { | |
3160 | INIT_LIST_HEAD(&file_hashtbl[i]); | |
3161 | } | |
3162 | for (i = 0; i < OWNER_HASH_SIZE; i++) { | |
3163 | INIT_LIST_HEAD(&ownerstr_hashtbl[i]); | |
3164 | INIT_LIST_HEAD(&ownerid_hashtbl[i]); | |
3165 | } | |
3166 | for (i = 0; i < STATEID_HASH_SIZE; i++) { | |
3167 | INIT_LIST_HEAD(&stateid_hashtbl[i]); | |
3168 | INIT_LIST_HEAD(&lockstateid_hashtbl[i]); | |
3169 | } | |
3170 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
3171 | INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); | |
3172 | INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); | |
3173 | } | |
1da177e4 | 3174 | memset(&onestateid, ~0, sizeof(stateid_t)); |
1da177e4 LT |
3175 | INIT_LIST_HEAD(&close_lru); |
3176 | INIT_LIST_HEAD(&client_lru); | |
3177 | INIT_LIST_HEAD(&del_recall_lru); | |
ac4d8ff2 N |
3178 | for (i = 0; i < CLIENT_HASH_SIZE; i++) |
3179 | INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); | |
3180 | reclaim_str_hashtbl_size = 0; | |
ac4d8ff2 N |
3181 | } |
3182 | ||
190e4fbf N |
3183 | static void |
3184 | nfsd4_load_reboot_recovery_data(void) | |
3185 | { | |
3186 | int status; | |
3187 | ||
0964a3d3 N |
3188 | nfs4_lock_state(); |
3189 | nfsd4_init_recdir(user_recovery_dirname); | |
190e4fbf | 3190 | status = nfsd4_recdir_load(); |
0964a3d3 | 3191 | nfs4_unlock_state(); |
190e4fbf N |
3192 | if (status) |
3193 | printk("NFSD: Failure reading reboot recovery data\n"); | |
3194 | } | |
3195 | ||
9a8db97e ME |
3196 | unsigned long |
3197 | get_nfs4_grace_period(void) | |
3198 | { | |
3199 | return max(user_lease_time, lease_time) * HZ; | |
3200 | } | |
3201 | ||
c2f1a551 MS |
3202 | /* |
3203 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
3204 | * client may quite reasonably hang on to a delegation as long as it has | |
3205 | * the inode cached. This becomes an obvious problem the first time a | |
3206 | * client's inode cache approaches the size of the server's total memory. | |
3207 | * | |
3208 | * For now we avoid this problem by imposing a hard limit on the number | |
3209 | * of delegations, which varies according to the server's memory size. | |
3210 | */ | |
3211 | static void | |
3212 | set_max_delegations(void) | |
3213 | { | |
3214 | /* | |
3215 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
3216 | * estimates suggest that in the worst case (where every delegation | |
3217 | * is for a different inode), a delegation could take about 1.5K, | |
3218 | * giving a worst case usage of about 6% of memory. | |
3219 | */ | |
3220 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
3221 | } | |
3222 | ||
ac4d8ff2 N |
3223 | /* initialization to perform when the nfsd service is started: */ |
3224 | ||
3225 | static void | |
3226 | __nfs4_state_start(void) | |
3227 | { | |
9a8db97e | 3228 | unsigned long grace_time; |
ac4d8ff2 | 3229 | |
1da177e4 | 3230 | boot_time = get_seconds(); |
9a8db97e | 3231 | grace_time = get_nfs_grace_period(); |
d99a05ad | 3232 | lease_time = user_lease_time; |
a76b4319 | 3233 | in_grace = 1; |
9a8db97e ME |
3234 | printk(KERN_INFO "NFSD: starting %ld-second grace period\n", |
3235 | grace_time/HZ); | |
58da282b | 3236 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
9a8db97e | 3237 | queue_delayed_work(laundry_wq, &laundromat_work, grace_time); |
c2f1a551 | 3238 | set_max_delegations(); |
1da177e4 LT |
3239 | } |
3240 | ||
3241 | int | |
76a3550e | 3242 | nfs4_state_start(void) |
1da177e4 LT |
3243 | { |
3244 | int status; | |
3245 | ||
3246 | if (nfs4_init) | |
3247 | return 0; | |
3248 | status = nfsd4_init_slabs(); | |
3249 | if (status) | |
3250 | return status; | |
190e4fbf | 3251 | nfsd4_load_reboot_recovery_data(); |
76a3550e | 3252 | __nfs4_state_start(); |
1da177e4 LT |
3253 | nfs4_init = 1; |
3254 | return 0; | |
3255 | } | |
3256 | ||
3257 | int | |
3258 | nfs4_in_grace(void) | |
3259 | { | |
a76b4319 | 3260 | return in_grace; |
1da177e4 LT |
3261 | } |
3262 | ||
3263 | time_t | |
3264 | nfs4_lease_time(void) | |
3265 | { | |
3266 | return lease_time; | |
3267 | } | |
3268 | ||
3269 | static void | |
3270 | __nfs4_state_shutdown(void) | |
3271 | { | |
3272 | int i; | |
3273 | struct nfs4_client *clp = NULL; | |
3274 | struct nfs4_delegation *dp = NULL; | |
1da177e4 LT |
3275 | struct list_head *pos, *next, reaplist; |
3276 | ||
1da177e4 LT |
3277 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
3278 | while (!list_empty(&conf_id_hashtbl[i])) { | |
3279 | clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
3280 | expire_client(clp); | |
3281 | } | |
3282 | while (!list_empty(&unconf_str_hashtbl[i])) { | |
3283 | clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); | |
3284 | expire_client(clp); | |
3285 | } | |
3286 | } | |
3287 | INIT_LIST_HEAD(&reaplist); | |
3288 | spin_lock(&recall_lock); | |
3289 | list_for_each_safe(pos, next, &del_recall_lru) { | |
3290 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3291 | list_move(&dp->dl_recall_lru, &reaplist); | |
3292 | } | |
3293 | spin_unlock(&recall_lock); | |
3294 | list_for_each_safe(pos, next, &reaplist) { | |
3295 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3296 | list_del_init(&dp->dl_recall_lru); | |
3297 | unhash_delegation(dp); | |
3298 | } | |
3299 | ||
190e4fbf | 3300 | nfsd4_shutdown_recdir(); |
1da177e4 | 3301 | nfs4_init = 0; |
1da177e4 LT |
3302 | } |
3303 | ||
3304 | void | |
3305 | nfs4_state_shutdown(void) | |
3306 | { | |
5e8d5c29 N |
3307 | cancel_rearming_delayed_workqueue(laundry_wq, &laundromat_work); |
3308 | destroy_workqueue(laundry_wq); | |
1da177e4 LT |
3309 | nfs4_lock_state(); |
3310 | nfs4_release_reclaim(); | |
3311 | __nfs4_state_shutdown(); | |
3312 | nfsd4_free_slabs(); | |
3313 | nfs4_unlock_state(); | |
3314 | } | |
3315 | ||
0964a3d3 N |
3316 | static void |
3317 | nfs4_set_recdir(char *recdir) | |
3318 | { | |
3319 | nfs4_lock_state(); | |
3320 | strcpy(user_recovery_dirname, recdir); | |
3321 | nfs4_unlock_state(); | |
3322 | } | |
3323 | ||
3324 | /* | |
3325 | * Change the NFSv4 recovery directory to recdir. | |
3326 | */ | |
3327 | int | |
3328 | nfs4_reset_recoverydir(char *recdir) | |
3329 | { | |
3330 | int status; | |
3331 | struct nameidata nd; | |
3332 | ||
3333 | status = path_lookup(recdir, LOOKUP_FOLLOW, &nd); | |
3334 | if (status) | |
3335 | return status; | |
3336 | status = -ENOTDIR; | |
3337 | if (S_ISDIR(nd.dentry->d_inode->i_mode)) { | |
3338 | nfs4_set_recdir(recdir); | |
3339 | status = 0; | |
3340 | } | |
3341 | path_release(&nd); | |
3342 | return status; | |
3343 | } | |
3344 | ||
1da177e4 LT |
3345 | /* |
3346 | * Called when leasetime is changed. | |
3347 | * | |
d99a05ad N |
3348 | * The only way the protocol gives us to handle on-the-fly lease changes is to |
3349 | * simulate a reboot. Instead of doing that, we just wait till the next time | |
3350 | * we start to register any changes in lease time. If the administrator | |
3351 | * really wants to change the lease time *now*, they can go ahead and bring | |
3352 | * nfsd down and then back up again after changing the lease time. | |
1da177e4 LT |
3353 | */ |
3354 | void | |
3355 | nfs4_reset_lease(time_t leasetime) | |
3356 | { | |
d99a05ad N |
3357 | lock_kernel(); |
3358 | user_lease_time = leasetime; | |
3359 | unlock_kernel(); | |
1da177e4 | 3360 | } |