diff options
Diffstat (limited to 'fs/nfsd/nfs4state.c')
-rw-r--r-- | fs/nfsd/nfs4state.c | 3320 |
1 files changed, 3320 insertions, 0 deletions
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c new file mode 100644 index 000000000000..579f7fea7968 --- /dev/null +++ b/fs/nfsd/nfs4state.c | |||
@@ -0,0 +1,3320 @@ | |||
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> | ||
51 | |||
52 | #define NFSDDBG_FACILITY NFSDDBG_PROC | ||
53 | |||
54 | /* Globals */ | ||
55 | static time_t lease_time = 90; /* default lease time */ | ||
56 | static time_t old_lease_time = 90; /* past incarnation lease time */ | ||
57 | static u32 nfs4_reclaim_init = 0; | ||
58 | time_t boot_time; | ||
59 | static time_t grace_end = 0; | ||
60 | static u32 current_clientid = 1; | ||
61 | static u32 current_ownerid = 1; | ||
62 | static u32 current_fileid = 1; | ||
63 | static u32 current_delegid = 1; | ||
64 | static u32 nfs4_init; | ||
65 | stateid_t zerostateid; /* bits all 0 */ | ||
66 | stateid_t onestateid; /* bits all 1 */ | ||
67 | |||
68 | /* debug counters */ | ||
69 | u32 list_add_perfile = 0; | ||
70 | u32 list_del_perfile = 0; | ||
71 | u32 add_perclient = 0; | ||
72 | u32 del_perclient = 0; | ||
73 | u32 alloc_file = 0; | ||
74 | u32 free_file = 0; | ||
75 | u32 vfsopen = 0; | ||
76 | u32 vfsclose = 0; | ||
77 | u32 alloc_delegation= 0; | ||
78 | u32 free_delegation= 0; | ||
79 | |||
80 | /* forward declarations */ | ||
81 | struct nfs4_stateid * find_stateid(stateid_t *stid, int flags); | ||
82 | static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid); | ||
83 | static void release_stateid_lockowners(struct nfs4_stateid *open_stp); | ||
84 | |||
85 | /* Locking: | ||
86 | * | ||
87 | * client_sema: | ||
88 | * protects clientid_hashtbl[], clientstr_hashtbl[], | ||
89 | * unconfstr_hashtbl[], uncofid_hashtbl[]. | ||
90 | */ | ||
91 | static DECLARE_MUTEX(client_sema); | ||
92 | |||
93 | void | ||
94 | nfs4_lock_state(void) | ||
95 | { | ||
96 | down(&client_sema); | ||
97 | } | ||
98 | |||
99 | void | ||
100 | nfs4_unlock_state(void) | ||
101 | { | ||
102 | up(&client_sema); | ||
103 | } | ||
104 | |||
105 | static inline u32 | ||
106 | opaque_hashval(const void *ptr, int nbytes) | ||
107 | { | ||
108 | unsigned char *cptr = (unsigned char *) ptr; | ||
109 | |||
110 | u32 x = 0; | ||
111 | while (nbytes--) { | ||
112 | x *= 37; | ||
113 | x += *cptr++; | ||
114 | } | ||
115 | return x; | ||
116 | } | ||
117 | |||
118 | /* forward declarations */ | ||
119 | static void release_stateowner(struct nfs4_stateowner *sop); | ||
120 | static void release_stateid(struct nfs4_stateid *stp, int flags); | ||
121 | static void release_file(struct nfs4_file *fp); | ||
122 | |||
123 | /* | ||
124 | * Delegation state | ||
125 | */ | ||
126 | |||
127 | /* recall_lock protects the del_recall_lru */ | ||
128 | spinlock_t recall_lock; | ||
129 | static struct list_head del_recall_lru; | ||
130 | |||
131 | static struct nfs4_delegation * | ||
132 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type) | ||
133 | { | ||
134 | struct nfs4_delegation *dp; | ||
135 | struct nfs4_file *fp = stp->st_file; | ||
136 | struct nfs4_callback *cb = &stp->st_stateowner->so_client->cl_callback; | ||
137 | |||
138 | dprintk("NFSD alloc_init_deleg\n"); | ||
139 | if ((dp = kmalloc(sizeof(struct nfs4_delegation), | ||
140 | GFP_KERNEL)) == NULL) | ||
141 | return dp; | ||
142 | INIT_LIST_HEAD(&dp->dl_del_perfile); | ||
143 | INIT_LIST_HEAD(&dp->dl_del_perclnt); | ||
144 | INIT_LIST_HEAD(&dp->dl_recall_lru); | ||
145 | dp->dl_client = clp; | ||
146 | dp->dl_file = fp; | ||
147 | dp->dl_flock = NULL; | ||
148 | get_file(stp->st_vfs_file); | ||
149 | dp->dl_vfs_file = stp->st_vfs_file; | ||
150 | dp->dl_type = type; | ||
151 | dp->dl_recall.cbr_dp = NULL; | ||
152 | dp->dl_recall.cbr_ident = cb->cb_ident; | ||
153 | dp->dl_recall.cbr_trunc = 0; | ||
154 | dp->dl_stateid.si_boot = boot_time; | ||
155 | dp->dl_stateid.si_stateownerid = current_delegid++; | ||
156 | dp->dl_stateid.si_fileid = 0; | ||
157 | dp->dl_stateid.si_generation = 0; | ||
158 | dp->dl_fhlen = current_fh->fh_handle.fh_size; | ||
159 | memcpy(dp->dl_fhval, ¤t_fh->fh_handle.fh_base, | ||
160 | current_fh->fh_handle.fh_size); | ||
161 | dp->dl_time = 0; | ||
162 | atomic_set(&dp->dl_count, 1); | ||
163 | list_add(&dp->dl_del_perfile, &fp->fi_del_perfile); | ||
164 | list_add(&dp->dl_del_perclnt, &clp->cl_del_perclnt); | ||
165 | alloc_delegation++; | ||
166 | return dp; | ||
167 | } | ||
168 | |||
169 | void | ||
170 | nfs4_put_delegation(struct nfs4_delegation *dp) | ||
171 | { | ||
172 | if (atomic_dec_and_test(&dp->dl_count)) { | ||
173 | dprintk("NFSD: freeing dp %p\n",dp); | ||
174 | kfree(dp); | ||
175 | free_delegation++; | ||
176 | } | ||
177 | } | ||
178 | |||
179 | /* Remove the associated file_lock first, then remove the delegation. | ||
180 | * lease_modify() is called to remove the FS_LEASE file_lock from | ||
181 | * the i_flock list, eventually calling nfsd's lock_manager | ||
182 | * fl_release_callback. | ||
183 | */ | ||
184 | static void | ||
185 | nfs4_close_delegation(struct nfs4_delegation *dp) | ||
186 | { | ||
187 | struct file *filp = dp->dl_vfs_file; | ||
188 | |||
189 | dprintk("NFSD: close_delegation dp %p\n",dp); | ||
190 | dp->dl_vfs_file = NULL; | ||
191 | /* The following nfsd_close may not actually close the file, | ||
192 | * but we want to remove the lease in any case. */ | ||
193 | setlease(filp, F_UNLCK, &dp->dl_flock); | ||
194 | nfsd_close(filp); | ||
195 | vfsclose++; | ||
196 | } | ||
197 | |||
198 | /* Called under the state lock. */ | ||
199 | static void | ||
200 | unhash_delegation(struct nfs4_delegation *dp) | ||
201 | { | ||
202 | list_del_init(&dp->dl_del_perfile); | ||
203 | list_del_init(&dp->dl_del_perclnt); | ||
204 | spin_lock(&recall_lock); | ||
205 | list_del_init(&dp->dl_recall_lru); | ||
206 | spin_unlock(&recall_lock); | ||
207 | nfs4_close_delegation(dp); | ||
208 | nfs4_put_delegation(dp); | ||
209 | } | ||
210 | |||
211 | /* | ||
212 | * SETCLIENTID state | ||
213 | */ | ||
214 | |||
215 | /* Hash tables for nfs4_clientid state */ | ||
216 | #define CLIENT_HASH_BITS 4 | ||
217 | #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) | ||
218 | #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) | ||
219 | |||
220 | #define clientid_hashval(id) \ | ||
221 | ((id) & CLIENT_HASH_MASK) | ||
222 | #define clientstr_hashval(name, namelen) \ | ||
223 | (opaque_hashval((name), (namelen)) & CLIENT_HASH_MASK) | ||
224 | /* | ||
225 | * reclaim_str_hashtbl[] holds known client info from previous reset/reboot | ||
226 | * used in reboot/reset lease grace period processing | ||
227 | * | ||
228 | * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed | ||
229 | * setclientid_confirmed info. | ||
230 | * | ||
231 | * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed | ||
232 | * setclientid info. | ||
233 | * | ||
234 | * client_lru holds client queue ordered by nfs4_client.cl_time | ||
235 | * for lease renewal. | ||
236 | * | ||
237 | * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time | ||
238 | * for last close replay. | ||
239 | */ | ||
240 | static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; | ||
241 | static int reclaim_str_hashtbl_size = 0; | ||
242 | static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; | ||
243 | static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; | ||
244 | static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; | ||
245 | static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; | ||
246 | static struct list_head client_lru; | ||
247 | static struct list_head close_lru; | ||
248 | |||
249 | static inline void | ||
250 | renew_client(struct nfs4_client *clp) | ||
251 | { | ||
252 | /* | ||
253 | * Move client to the end to the LRU list. | ||
254 | */ | ||
255 | dprintk("renewing client (clientid %08x/%08x)\n", | ||
256 | clp->cl_clientid.cl_boot, | ||
257 | clp->cl_clientid.cl_id); | ||
258 | list_move_tail(&clp->cl_lru, &client_lru); | ||
259 | clp->cl_time = get_seconds(); | ||
260 | } | ||
261 | |||
262 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ | ||
263 | static int | ||
264 | STALE_CLIENTID(clientid_t *clid) | ||
265 | { | ||
266 | if (clid->cl_boot == boot_time) | ||
267 | return 0; | ||
268 | dprintk("NFSD stale clientid (%08x/%08x)\n", | ||
269 | clid->cl_boot, clid->cl_id); | ||
270 | return 1; | ||
271 | } | ||
272 | |||
273 | /* | ||
274 | * XXX Should we use a slab cache ? | ||
275 | * This type of memory management is somewhat inefficient, but we use it | ||
276 | * anyway since SETCLIENTID is not a common operation. | ||
277 | */ | ||
278 | static inline struct nfs4_client * | ||
279 | alloc_client(struct xdr_netobj name) | ||
280 | { | ||
281 | struct nfs4_client *clp; | ||
282 | |||
283 | if ((clp = kmalloc(sizeof(struct nfs4_client), GFP_KERNEL))!= NULL) { | ||
284 | memset(clp, 0, sizeof(*clp)); | ||
285 | if ((clp->cl_name.data = kmalloc(name.len, GFP_KERNEL)) != NULL) { | ||
286 | memcpy(clp->cl_name.data, name.data, name.len); | ||
287 | clp->cl_name.len = name.len; | ||
288 | } | ||
289 | else { | ||
290 | kfree(clp); | ||
291 | clp = NULL; | ||
292 | } | ||
293 | } | ||
294 | return clp; | ||
295 | } | ||
296 | |||
297 | static inline void | ||
298 | free_client(struct nfs4_client *clp) | ||
299 | { | ||
300 | if (clp->cl_cred.cr_group_info) | ||
301 | put_group_info(clp->cl_cred.cr_group_info); | ||
302 | kfree(clp->cl_name.data); | ||
303 | kfree(clp); | ||
304 | } | ||
305 | |||
306 | void | ||
307 | put_nfs4_client(struct nfs4_client *clp) | ||
308 | { | ||
309 | if (atomic_dec_and_test(&clp->cl_count)) | ||
310 | free_client(clp); | ||
311 | } | ||
312 | |||
313 | static void | ||
314 | expire_client(struct nfs4_client *clp) | ||
315 | { | ||
316 | struct nfs4_stateowner *sop; | ||
317 | struct nfs4_delegation *dp; | ||
318 | struct nfs4_callback *cb = &clp->cl_callback; | ||
319 | struct rpc_clnt *clnt = clp->cl_callback.cb_client; | ||
320 | struct list_head reaplist; | ||
321 | |||
322 | dprintk("NFSD: expire_client cl_count %d\n", | ||
323 | atomic_read(&clp->cl_count)); | ||
324 | |||
325 | /* shutdown rpc client, ending any outstanding recall rpcs */ | ||
326 | if (atomic_read(&cb->cb_set) == 1 && clnt) { | ||
327 | rpc_shutdown_client(clnt); | ||
328 | clnt = clp->cl_callback.cb_client = NULL; | ||
329 | } | ||
330 | |||
331 | INIT_LIST_HEAD(&reaplist); | ||
332 | spin_lock(&recall_lock); | ||
333 | while (!list_empty(&clp->cl_del_perclnt)) { | ||
334 | dp = list_entry(clp->cl_del_perclnt.next, struct nfs4_delegation, dl_del_perclnt); | ||
335 | dprintk("NFSD: expire client. dp %p, fp %p\n", dp, | ||
336 | dp->dl_flock); | ||
337 | list_del_init(&dp->dl_del_perclnt); | ||
338 | list_move(&dp->dl_recall_lru, &reaplist); | ||
339 | } | ||
340 | spin_unlock(&recall_lock); | ||
341 | while (!list_empty(&reaplist)) { | ||
342 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | ||
343 | list_del_init(&dp->dl_recall_lru); | ||
344 | unhash_delegation(dp); | ||
345 | } | ||
346 | list_del(&clp->cl_idhash); | ||
347 | list_del(&clp->cl_strhash); | ||
348 | list_del(&clp->cl_lru); | ||
349 | while (!list_empty(&clp->cl_perclient)) { | ||
350 | sop = list_entry(clp->cl_perclient.next, struct nfs4_stateowner, so_perclient); | ||
351 | release_stateowner(sop); | ||
352 | } | ||
353 | put_nfs4_client(clp); | ||
354 | } | ||
355 | |||
356 | static struct nfs4_client * | ||
357 | create_client(struct xdr_netobj name) { | ||
358 | struct nfs4_client *clp; | ||
359 | |||
360 | if (!(clp = alloc_client(name))) | ||
361 | goto out; | ||
362 | atomic_set(&clp->cl_count, 1); | ||
363 | atomic_set(&clp->cl_callback.cb_set, 0); | ||
364 | clp->cl_callback.cb_parsed = 0; | ||
365 | INIT_LIST_HEAD(&clp->cl_idhash); | ||
366 | INIT_LIST_HEAD(&clp->cl_strhash); | ||
367 | INIT_LIST_HEAD(&clp->cl_perclient); | ||
368 | INIT_LIST_HEAD(&clp->cl_del_perclnt); | ||
369 | INIT_LIST_HEAD(&clp->cl_lru); | ||
370 | out: | ||
371 | return clp; | ||
372 | } | ||
373 | |||
374 | static void | ||
375 | copy_verf(struct nfs4_client *target, nfs4_verifier *source) { | ||
376 | memcpy(target->cl_verifier.data, source->data, sizeof(target->cl_verifier.data)); | ||
377 | } | ||
378 | |||
379 | static void | ||
380 | copy_clid(struct nfs4_client *target, struct nfs4_client *source) { | ||
381 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; | ||
382 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | ||
383 | } | ||
384 | |||
385 | static void | ||
386 | copy_cred(struct svc_cred *target, struct svc_cred *source) { | ||
387 | |||
388 | target->cr_uid = source->cr_uid; | ||
389 | target->cr_gid = source->cr_gid; | ||
390 | target->cr_group_info = source->cr_group_info; | ||
391 | get_group_info(target->cr_group_info); | ||
392 | } | ||
393 | |||
394 | static int | ||
395 | cmp_name(struct xdr_netobj *n1, struct xdr_netobj *n2) { | ||
396 | if (!n1 || !n2) | ||
397 | return 0; | ||
398 | return((n1->len == n2->len) && !memcmp(n1->data, n2->data, n2->len)); | ||
399 | } | ||
400 | |||
401 | static int | ||
402 | cmp_verf(nfs4_verifier *v1, nfs4_verifier *v2) { | ||
403 | return(!memcmp(v1->data,v2->data,sizeof(v1->data))); | ||
404 | } | ||
405 | |||
406 | static int | ||
407 | cmp_clid(clientid_t * cl1, clientid_t * cl2) { | ||
408 | return((cl1->cl_boot == cl2->cl_boot) && | ||
409 | (cl1->cl_id == cl2->cl_id)); | ||
410 | } | ||
411 | |||
412 | /* XXX what about NGROUP */ | ||
413 | static int | ||
414 | cmp_creds(struct svc_cred *cr1, struct svc_cred *cr2){ | ||
415 | return(cr1->cr_uid == cr2->cr_uid); | ||
416 | |||
417 | } | ||
418 | |||
419 | static void | ||
420 | gen_clid(struct nfs4_client *clp) { | ||
421 | clp->cl_clientid.cl_boot = boot_time; | ||
422 | clp->cl_clientid.cl_id = current_clientid++; | ||
423 | } | ||
424 | |||
425 | static void | ||
426 | gen_confirm(struct nfs4_client *clp) { | ||
427 | struct timespec tv; | ||
428 | u32 * p; | ||
429 | |||
430 | tv = CURRENT_TIME; | ||
431 | p = (u32 *)clp->cl_confirm.data; | ||
432 | *p++ = tv.tv_sec; | ||
433 | *p++ = tv.tv_nsec; | ||
434 | } | ||
435 | |||
436 | static int | ||
437 | check_name(struct xdr_netobj name) { | ||
438 | |||
439 | if (name.len == 0) | ||
440 | return 0; | ||
441 | if (name.len > NFS4_OPAQUE_LIMIT) { | ||
442 | printk("NFSD: check_name: name too long(%d)!\n", name.len); | ||
443 | return 0; | ||
444 | } | ||
445 | return 1; | ||
446 | } | ||
447 | |||
448 | void | ||
449 | add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) | ||
450 | { | ||
451 | unsigned int idhashval; | ||
452 | |||
453 | list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); | ||
454 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); | ||
455 | list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); | ||
456 | list_add_tail(&clp->cl_lru, &client_lru); | ||
457 | clp->cl_time = get_seconds(); | ||
458 | } | ||
459 | |||
460 | void | ||
461 | move_to_confirmed(struct nfs4_client *clp) | ||
462 | { | ||
463 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | ||
464 | unsigned int strhashval; | ||
465 | |||
466 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | ||
467 | list_del_init(&clp->cl_strhash); | ||
468 | list_del_init(&clp->cl_idhash); | ||
469 | list_add(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); | ||
470 | strhashval = clientstr_hashval(clp->cl_name.data, | ||
471 | clp->cl_name.len); | ||
472 | list_add(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); | ||
473 | renew_client(clp); | ||
474 | } | ||
475 | |||
476 | static struct nfs4_client * | ||
477 | find_confirmed_client(clientid_t *clid) | ||
478 | { | ||
479 | struct nfs4_client *clp; | ||
480 | unsigned int idhashval = clientid_hashval(clid->cl_id); | ||
481 | |||
482 | list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { | ||
483 | if (cmp_clid(&clp->cl_clientid, clid)) | ||
484 | return clp; | ||
485 | } | ||
486 | return NULL; | ||
487 | } | ||
488 | |||
489 | static struct nfs4_client * | ||
490 | find_unconfirmed_client(clientid_t *clid) | ||
491 | { | ||
492 | struct nfs4_client *clp; | ||
493 | unsigned int idhashval = clientid_hashval(clid->cl_id); | ||
494 | |||
495 | list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { | ||
496 | if (cmp_clid(&clp->cl_clientid, clid)) | ||
497 | return clp; | ||
498 | } | ||
499 | return NULL; | ||
500 | } | ||
501 | |||
502 | /* a helper function for parse_callback */ | ||
503 | static int | ||
504 | parse_octet(unsigned int *lenp, char **addrp) | ||
505 | { | ||
506 | unsigned int len = *lenp; | ||
507 | char *p = *addrp; | ||
508 | int n = -1; | ||
509 | char c; | ||
510 | |||
511 | for (;;) { | ||
512 | if (!len) | ||
513 | break; | ||
514 | len--; | ||
515 | c = *p++; | ||
516 | if (c == '.') | ||
517 | break; | ||
518 | if ((c < '0') || (c > '9')) { | ||
519 | n = -1; | ||
520 | break; | ||
521 | } | ||
522 | if (n < 0) | ||
523 | n = 0; | ||
524 | n = (n * 10) + (c - '0'); | ||
525 | if (n > 255) { | ||
526 | n = -1; | ||
527 | break; | ||
528 | } | ||
529 | } | ||
530 | *lenp = len; | ||
531 | *addrp = p; | ||
532 | return n; | ||
533 | } | ||
534 | |||
535 | /* parse and set the setclientid ipv4 callback address */ | ||
536 | int | ||
537 | parse_ipv4(unsigned int addr_len, char *addr_val, unsigned int *cbaddrp, unsigned short *cbportp) | ||
538 | { | ||
539 | int temp = 0; | ||
540 | u32 cbaddr = 0; | ||
541 | u16 cbport = 0; | ||
542 | u32 addrlen = addr_len; | ||
543 | char *addr = addr_val; | ||
544 | int i, shift; | ||
545 | |||
546 | /* ipaddress */ | ||
547 | shift = 24; | ||
548 | for(i = 4; i > 0 ; i--) { | ||
549 | if ((temp = parse_octet(&addrlen, &addr)) < 0) { | ||
550 | return 0; | ||
551 | } | ||
552 | cbaddr |= (temp << shift); | ||
553 | if (shift > 0) | ||
554 | shift -= 8; | ||
555 | } | ||
556 | *cbaddrp = cbaddr; | ||
557 | |||
558 | /* port */ | ||
559 | shift = 8; | ||
560 | for(i = 2; i > 0 ; i--) { | ||
561 | if ((temp = parse_octet(&addrlen, &addr)) < 0) { | ||
562 | return 0; | ||
563 | } | ||
564 | cbport |= (temp << shift); | ||
565 | if (shift > 0) | ||
566 | shift -= 8; | ||
567 | } | ||
568 | *cbportp = cbport; | ||
569 | return 1; | ||
570 | } | ||
571 | |||
572 | void | ||
573 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se) | ||
574 | { | ||
575 | struct nfs4_callback *cb = &clp->cl_callback; | ||
576 | |||
577 | /* Currently, we only support tcp for the callback channel */ | ||
578 | if ((se->se_callback_netid_len != 3) || memcmp((char *)se->se_callback_netid_val, "tcp", 3)) | ||
579 | goto out_err; | ||
580 | |||
581 | if ( !(parse_ipv4(se->se_callback_addr_len, se->se_callback_addr_val, | ||
582 | &cb->cb_addr, &cb->cb_port))) | ||
583 | goto out_err; | ||
584 | cb->cb_prog = se->se_callback_prog; | ||
585 | cb->cb_ident = se->se_callback_ident; | ||
586 | cb->cb_parsed = 1; | ||
587 | return; | ||
588 | out_err: | ||
589 | printk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " | ||
590 | "will not receive delegations\n", | ||
591 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | ||
592 | |||
593 | cb->cb_parsed = 0; | ||
594 | return; | ||
595 | } | ||
596 | |||
597 | /* | ||
598 | * RFC 3010 has a complex implmentation description of processing a | ||
599 | * SETCLIENTID request consisting of 5 bullets, labeled as | ||
600 | * CASE0 - CASE4 below. | ||
601 | * | ||
602 | * NOTES: | ||
603 | * callback information will be processed in a future patch | ||
604 | * | ||
605 | * an unconfirmed record is added when: | ||
606 | * NORMAL (part of CASE 4): there is no confirmed nor unconfirmed record. | ||
607 | * CASE 1: confirmed record found with matching name, principal, | ||
608 | * verifier, and clientid. | ||
609 | * CASE 2: confirmed record found with matching name, principal, | ||
610 | * and there is no unconfirmed record with matching | ||
611 | * name and principal | ||
612 | * | ||
613 | * an unconfirmed record is replaced when: | ||
614 | * CASE 3: confirmed record found with matching name, principal, | ||
615 | * and an unconfirmed record is found with matching | ||
616 | * name, principal, and with clientid and | ||
617 | * confirm that does not match the confirmed record. | ||
618 | * CASE 4: there is no confirmed record with matching name and | ||
619 | * principal. there is an unconfirmed record with | ||
620 | * matching name, principal. | ||
621 | * | ||
622 | * an unconfirmed record is deleted when: | ||
623 | * CASE 1: an unconfirmed record that matches input name, verifier, | ||
624 | * and confirmed clientid. | ||
625 | * CASE 4: any unconfirmed records with matching name and principal | ||
626 | * that exist after an unconfirmed record has been replaced | ||
627 | * as described above. | ||
628 | * | ||
629 | */ | ||
630 | int | ||
631 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_setclientid *setclid) | ||
632 | { | ||
633 | u32 ip_addr = rqstp->rq_addr.sin_addr.s_addr; | ||
634 | struct xdr_netobj clname = { | ||
635 | .len = setclid->se_namelen, | ||
636 | .data = setclid->se_name, | ||
637 | }; | ||
638 | nfs4_verifier clverifier = setclid->se_verf; | ||
639 | unsigned int strhashval; | ||
640 | struct nfs4_client * conf, * unconf, * new, * clp; | ||
641 | int status; | ||
642 | |||
643 | status = nfserr_inval; | ||
644 | if (!check_name(clname)) | ||
645 | goto out; | ||
646 | |||
647 | /* | ||
648 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | ||
649 | * We get here on a DRC miss. | ||
650 | */ | ||
651 | |||
652 | strhashval = clientstr_hashval(clname.data, clname.len); | ||
653 | |||
654 | conf = NULL; | ||
655 | nfs4_lock_state(); | ||
656 | list_for_each_entry(clp, &conf_str_hashtbl[strhashval], cl_strhash) { | ||
657 | if (!cmp_name(&clp->cl_name, &clname)) | ||
658 | continue; | ||
659 | /* | ||
660 | * CASE 0: | ||
661 | * clname match, confirmed, different principal | ||
662 | * or different ip_address | ||
663 | */ | ||
664 | status = nfserr_clid_inuse; | ||
665 | if (!cmp_creds(&clp->cl_cred,&rqstp->rq_cred)) { | ||
666 | printk("NFSD: setclientid: string in use by client" | ||
667 | "(clientid %08x/%08x)\n", | ||
668 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | ||
669 | goto out; | ||
670 | } | ||
671 | if (clp->cl_addr != ip_addr) { | ||
672 | printk("NFSD: setclientid: string in use by client" | ||
673 | "(clientid %08x/%08x)\n", | ||
674 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | ||
675 | goto out; | ||
676 | } | ||
677 | |||
678 | /* | ||
679 | * cl_name match from a previous SETCLIENTID operation | ||
680 | * XXX check for additional matches? | ||
681 | */ | ||
682 | conf = clp; | ||
683 | break; | ||
684 | } | ||
685 | unconf = NULL; | ||
686 | list_for_each_entry(clp, &unconf_str_hashtbl[strhashval], cl_strhash) { | ||
687 | if (!cmp_name(&clp->cl_name, &clname)) | ||
688 | continue; | ||
689 | /* cl_name match from a previous SETCLIENTID operation */ | ||
690 | unconf = clp; | ||
691 | break; | ||
692 | } | ||
693 | status = nfserr_resource; | ||
694 | if (!conf) { | ||
695 | /* | ||
696 | * CASE 4: | ||
697 | * placed first, because it is the normal case. | ||
698 | */ | ||
699 | if (unconf) | ||
700 | expire_client(unconf); | ||
701 | if (!(new = create_client(clname))) | ||
702 | goto out; | ||
703 | copy_verf(new, &clverifier); | ||
704 | new->cl_addr = ip_addr; | ||
705 | copy_cred(&new->cl_cred,&rqstp->rq_cred); | ||
706 | gen_clid(new); | ||
707 | gen_confirm(new); | ||
708 | gen_callback(new, setclid); | ||
709 | add_to_unconfirmed(new, strhashval); | ||
710 | } else if (cmp_verf(&conf->cl_verifier, &clverifier)) { | ||
711 | /* | ||
712 | * CASE 1: | ||
713 | * cl_name match, confirmed, principal match | ||
714 | * verifier match: probable callback update | ||
715 | * | ||
716 | * remove any unconfirmed nfs4_client with | ||
717 | * matching cl_name, cl_verifier, and cl_clientid | ||
718 | * | ||
719 | * create and insert an unconfirmed nfs4_client with same | ||
720 | * cl_name, cl_verifier, and cl_clientid as existing | ||
721 | * nfs4_client, but with the new callback info and a | ||
722 | * new cl_confirm | ||
723 | */ | ||
724 | if ((unconf) && | ||
725 | cmp_verf(&unconf->cl_verifier, &conf->cl_verifier) && | ||
726 | cmp_clid(&unconf->cl_clientid, &conf->cl_clientid)) { | ||
727 | expire_client(unconf); | ||
728 | } | ||
729 | if (!(new = create_client(clname))) | ||
730 | goto out; | ||
731 | copy_verf(new,&conf->cl_verifier); | ||
732 | new->cl_addr = ip_addr; | ||
733 | copy_cred(&new->cl_cred,&rqstp->rq_cred); | ||
734 | copy_clid(new, conf); | ||
735 | gen_confirm(new); | ||
736 | gen_callback(new, setclid); | ||
737 | add_to_unconfirmed(new,strhashval); | ||
738 | } else if (!unconf) { | ||
739 | /* | ||
740 | * CASE 2: | ||
741 | * clname match, confirmed, principal match | ||
742 | * verfier does not match | ||
743 | * no unconfirmed. create a new unconfirmed nfs4_client | ||
744 | * using input clverifier, clname, and callback info | ||
745 | * and generate a new cl_clientid and cl_confirm. | ||
746 | */ | ||
747 | if (!(new = create_client(clname))) | ||
748 | goto out; | ||
749 | copy_verf(new,&clverifier); | ||
750 | new->cl_addr = ip_addr; | ||
751 | copy_cred(&new->cl_cred,&rqstp->rq_cred); | ||
752 | gen_clid(new); | ||
753 | gen_confirm(new); | ||
754 | gen_callback(new, setclid); | ||
755 | add_to_unconfirmed(new, strhashval); | ||
756 | } else if (!cmp_verf(&conf->cl_confirm, &unconf->cl_confirm)) { | ||
757 | /* | ||
758 | * CASE3: | ||
759 | * confirmed found (name, principal match) | ||
760 | * confirmed verifier does not match input clverifier | ||
761 | * | ||
762 | * unconfirmed found (name match) | ||
763 | * confirmed->cl_confirm != unconfirmed->cl_confirm | ||
764 | * | ||
765 | * remove unconfirmed. | ||
766 | * | ||
767 | * create an unconfirmed nfs4_client | ||
768 | * with same cl_name as existing confirmed nfs4_client, | ||
769 | * but with new callback info, new cl_clientid, | ||
770 | * new cl_verifier and a new cl_confirm | ||
771 | */ | ||
772 | expire_client(unconf); | ||
773 | if (!(new = create_client(clname))) | ||
774 | goto out; | ||
775 | copy_verf(new,&clverifier); | ||
776 | new->cl_addr = ip_addr; | ||
777 | copy_cred(&new->cl_cred,&rqstp->rq_cred); | ||
778 | gen_clid(new); | ||
779 | gen_confirm(new); | ||
780 | gen_callback(new, setclid); | ||
781 | add_to_unconfirmed(new, strhashval); | ||
782 | } else { | ||
783 | /* No cases hit !!! */ | ||
784 | status = nfserr_inval; | ||
785 | goto out; | ||
786 | |||
787 | } | ||
788 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; | ||
789 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | ||
790 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | ||
791 | status = nfs_ok; | ||
792 | out: | ||
793 | nfs4_unlock_state(); | ||
794 | return status; | ||
795 | } | ||
796 | |||
797 | |||
798 | /* | ||
799 | * RFC 3010 has a complex implmentation description of processing a | ||
800 | * SETCLIENTID_CONFIRM request consisting of 4 bullets describing | ||
801 | * processing on a DRC miss, labeled as CASE1 - CASE4 below. | ||
802 | * | ||
803 | * NOTE: callback information will be processed here in a future patch | ||
804 | */ | ||
805 | int | ||
806 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, struct nfsd4_setclientid_confirm *setclientid_confirm) | ||
807 | { | ||
808 | u32 ip_addr = rqstp->rq_addr.sin_addr.s_addr; | ||
809 | struct nfs4_client *clp, *conf = NULL, *unconf = NULL; | ||
810 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; | ||
811 | clientid_t * clid = &setclientid_confirm->sc_clientid; | ||
812 | int status; | ||
813 | |||
814 | if (STALE_CLIENTID(clid)) | ||
815 | return nfserr_stale_clientid; | ||
816 | /* | ||
817 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | ||
818 | * We get here on a DRC miss. | ||
819 | */ | ||
820 | |||
821 | nfs4_lock_state(); | ||
822 | clp = find_confirmed_client(clid); | ||
823 | if (clp) { | ||
824 | status = nfserr_inval; | ||
825 | /* | ||
826 | * Found a record for this clientid. If the IP addresses | ||
827 | * don't match, return ERR_INVAL just as if the record had | ||
828 | * not been found. | ||
829 | */ | ||
830 | if (clp->cl_addr != ip_addr) { | ||
831 | printk("NFSD: setclientid: string in use by client" | ||
832 | "(clientid %08x/%08x)\n", | ||
833 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | ||
834 | goto out; | ||
835 | } | ||
836 | conf = clp; | ||
837 | } | ||
838 | clp = find_unconfirmed_client(clid); | ||
839 | if (clp) { | ||
840 | status = nfserr_inval; | ||
841 | if (clp->cl_addr != ip_addr) { | ||
842 | printk("NFSD: setclientid: string in use by client" | ||
843 | "(clientid %08x/%08x)\n", | ||
844 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | ||
845 | goto out; | ||
846 | } | ||
847 | unconf = clp; | ||
848 | } | ||
849 | /* CASE 1: | ||
850 | * unconf record that matches input clientid and input confirm. | ||
851 | * conf record that matches input clientid. | ||
852 | * conf and unconf records match names, verifiers | ||
853 | */ | ||
854 | if ((conf && unconf) && | ||
855 | (cmp_verf(&unconf->cl_confirm, &confirm)) && | ||
856 | (cmp_verf(&conf->cl_verifier, &unconf->cl_verifier)) && | ||
857 | (cmp_name(&conf->cl_name,&unconf->cl_name)) && | ||
858 | (!cmp_verf(&conf->cl_confirm, &unconf->cl_confirm))) { | ||
859 | if (!cmp_creds(&conf->cl_cred, &unconf->cl_cred)) | ||
860 | status = nfserr_clid_inuse; | ||
861 | else { | ||
862 | expire_client(conf); | ||
863 | clp = unconf; | ||
864 | move_to_confirmed(unconf); | ||
865 | status = nfs_ok; | ||
866 | } | ||
867 | goto out; | ||
868 | } | ||
869 | /* CASE 2: | ||
870 | * conf record that matches input clientid. | ||
871 | * if unconf record that matches input clientid, then unconf->cl_name | ||
872 | * or unconf->cl_verifier don't match the conf record. | ||
873 | */ | ||
874 | if ((conf && !unconf) || | ||
875 | ((conf && unconf) && | ||
876 | (!cmp_verf(&conf->cl_verifier, &unconf->cl_verifier) || | ||
877 | !cmp_name(&conf->cl_name, &unconf->cl_name)))) { | ||
878 | if (!cmp_creds(&conf->cl_cred,&rqstp->rq_cred)) { | ||
879 | status = nfserr_clid_inuse; | ||
880 | } else { | ||
881 | clp = conf; | ||
882 | status = nfs_ok; | ||
883 | } | ||
884 | goto out; | ||
885 | } | ||
886 | /* CASE 3: | ||
887 | * conf record not found. | ||
888 | * unconf record found. | ||
889 | * unconf->cl_confirm matches input confirm | ||
890 | */ | ||
891 | if (!conf && unconf && cmp_verf(&unconf->cl_confirm, &confirm)) { | ||
892 | if (!cmp_creds(&unconf->cl_cred, &rqstp->rq_cred)) { | ||
893 | status = nfserr_clid_inuse; | ||
894 | } else { | ||
895 | status = nfs_ok; | ||
896 | clp = unconf; | ||
897 | move_to_confirmed(unconf); | ||
898 | } | ||
899 | goto out; | ||
900 | } | ||
901 | /* CASE 4: | ||
902 | * conf record not found, or if conf, then conf->cl_confirm does not | ||
903 | * match input confirm. | ||
904 | * unconf record not found, or if unconf, then unconf->cl_confirm | ||
905 | * does not match input confirm. | ||
906 | */ | ||
907 | if ((!conf || (conf && !cmp_verf(&conf->cl_confirm, &confirm))) && | ||
908 | (!unconf || (unconf && !cmp_verf(&unconf->cl_confirm, &confirm)))) { | ||
909 | status = nfserr_stale_clientid; | ||
910 | goto out; | ||
911 | } | ||
912 | /* check that we have hit one of the cases...*/ | ||
913 | status = nfserr_inval; | ||
914 | goto out; | ||
915 | out: | ||
916 | if (!status) | ||
917 | nfsd4_probe_callback(clp); | ||
918 | nfs4_unlock_state(); | ||
919 | return status; | ||
920 | } | ||
921 | |||
922 | /* | ||
923 | * Open owner state (share locks) | ||
924 | */ | ||
925 | |||
926 | /* hash tables for nfs4_stateowner */ | ||
927 | #define OWNER_HASH_BITS 8 | ||
928 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | ||
929 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | ||
930 | |||
931 | #define ownerid_hashval(id) \ | ||
932 | ((id) & OWNER_HASH_MASK) | ||
933 | #define ownerstr_hashval(clientid, ownername) \ | ||
934 | (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK) | ||
935 | |||
936 | static struct list_head ownerid_hashtbl[OWNER_HASH_SIZE]; | ||
937 | static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; | ||
938 | |||
939 | /* hash table for nfs4_file */ | ||
940 | #define FILE_HASH_BITS 8 | ||
941 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | ||
942 | #define FILE_HASH_MASK (FILE_HASH_SIZE - 1) | ||
943 | /* hash table for (open)nfs4_stateid */ | ||
944 | #define STATEID_HASH_BITS 10 | ||
945 | #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS) | ||
946 | #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1) | ||
947 | |||
948 | #define file_hashval(x) \ | ||
949 | hash_ptr(x, FILE_HASH_BITS) | ||
950 | #define stateid_hashval(owner_id, file_id) \ | ||
951 | (((owner_id) + (file_id)) & STATEID_HASH_MASK) | ||
952 | |||
953 | static struct list_head file_hashtbl[FILE_HASH_SIZE]; | ||
954 | static struct list_head stateid_hashtbl[STATEID_HASH_SIZE]; | ||
955 | |||
956 | /* OPEN Share state helper functions */ | ||
957 | static inline struct nfs4_file * | ||
958 | alloc_init_file(struct inode *ino) | ||
959 | { | ||
960 | struct nfs4_file *fp; | ||
961 | unsigned int hashval = file_hashval(ino); | ||
962 | |||
963 | if ((fp = kmalloc(sizeof(struct nfs4_file),GFP_KERNEL))) { | ||
964 | INIT_LIST_HEAD(&fp->fi_hash); | ||
965 | INIT_LIST_HEAD(&fp->fi_perfile); | ||
966 | INIT_LIST_HEAD(&fp->fi_del_perfile); | ||
967 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); | ||
968 | fp->fi_inode = igrab(ino); | ||
969 | fp->fi_id = current_fileid++; | ||
970 | alloc_file++; | ||
971 | return fp; | ||
972 | } | ||
973 | return NULL; | ||
974 | } | ||
975 | |||
976 | static void | ||
977 | release_all_files(void) | ||
978 | { | ||
979 | int i; | ||
980 | struct nfs4_file *fp; | ||
981 | |||
982 | for (i=0;i<FILE_HASH_SIZE;i++) { | ||
983 | while (!list_empty(&file_hashtbl[i])) { | ||
984 | fp = list_entry(file_hashtbl[i].next, struct nfs4_file, fi_hash); | ||
985 | /* this should never be more than once... */ | ||
986 | if (!list_empty(&fp->fi_perfile) || !list_empty(&fp->fi_del_perfile)) { | ||
987 | printk("ERROR: release_all_files: file %p is open, creating dangling state !!!\n",fp); | ||
988 | } | ||
989 | release_file(fp); | ||
990 | } | ||
991 | } | ||
992 | } | ||
993 | |||
994 | kmem_cache_t *stateowner_slab = NULL; | ||
995 | |||
996 | static int | ||
997 | nfsd4_init_slabs(void) | ||
998 | { | ||
999 | stateowner_slab = kmem_cache_create("nfsd4_stateowners", | ||
1000 | sizeof(struct nfs4_stateowner), 0, 0, NULL, NULL); | ||
1001 | if (stateowner_slab == NULL) { | ||
1002 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | ||
1003 | return -ENOMEM; | ||
1004 | } | ||
1005 | return 0; | ||
1006 | } | ||
1007 | |||
1008 | static void | ||
1009 | nfsd4_free_slabs(void) | ||
1010 | { | ||
1011 | int status = 0; | ||
1012 | |||
1013 | if (stateowner_slab) | ||
1014 | status = kmem_cache_destroy(stateowner_slab); | ||
1015 | stateowner_slab = NULL; | ||
1016 | BUG_ON(status); | ||
1017 | } | ||
1018 | |||
1019 | void | ||
1020 | nfs4_free_stateowner(struct kref *kref) | ||
1021 | { | ||
1022 | struct nfs4_stateowner *sop = | ||
1023 | container_of(kref, struct nfs4_stateowner, so_ref); | ||
1024 | kfree(sop->so_owner.data); | ||
1025 | kmem_cache_free(stateowner_slab, sop); | ||
1026 | } | ||
1027 | |||
1028 | static inline struct nfs4_stateowner * | ||
1029 | alloc_stateowner(struct xdr_netobj *owner) | ||
1030 | { | ||
1031 | struct nfs4_stateowner *sop; | ||
1032 | |||
1033 | if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) { | ||
1034 | if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) { | ||
1035 | memcpy(sop->so_owner.data, owner->data, owner->len); | ||
1036 | sop->so_owner.len = owner->len; | ||
1037 | kref_init(&sop->so_ref); | ||
1038 | return sop; | ||
1039 | } | ||
1040 | kmem_cache_free(stateowner_slab, sop); | ||
1041 | } | ||
1042 | return NULL; | ||
1043 | } | ||
1044 | |||
1045 | static struct nfs4_stateowner * | ||
1046 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { | ||
1047 | struct nfs4_stateowner *sop; | ||
1048 | struct nfs4_replay *rp; | ||
1049 | unsigned int idhashval; | ||
1050 | |||
1051 | if (!(sop = alloc_stateowner(&open->op_owner))) | ||
1052 | return NULL; | ||
1053 | idhashval = ownerid_hashval(current_ownerid); | ||
1054 | INIT_LIST_HEAD(&sop->so_idhash); | ||
1055 | INIT_LIST_HEAD(&sop->so_strhash); | ||
1056 | INIT_LIST_HEAD(&sop->so_perclient); | ||
1057 | INIT_LIST_HEAD(&sop->so_perfilestate); | ||
1058 | INIT_LIST_HEAD(&sop->so_perlockowner); /* not used */ | ||
1059 | INIT_LIST_HEAD(&sop->so_close_lru); | ||
1060 | sop->so_time = 0; | ||
1061 | list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]); | ||
1062 | list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]); | ||
1063 | list_add(&sop->so_perclient, &clp->cl_perclient); | ||
1064 | add_perclient++; | ||
1065 | sop->so_is_open_owner = 1; | ||
1066 | sop->so_id = current_ownerid++; | ||
1067 | sop->so_client = clp; | ||
1068 | sop->so_seqid = open->op_seqid; | ||
1069 | sop->so_confirmed = 0; | ||
1070 | rp = &sop->so_replay; | ||
1071 | rp->rp_status = NFSERR_SERVERFAULT; | ||
1072 | rp->rp_buflen = 0; | ||
1073 | rp->rp_buf = rp->rp_ibuf; | ||
1074 | return sop; | ||
1075 | } | ||
1076 | |||
1077 | static void | ||
1078 | release_stateid_lockowners(struct nfs4_stateid *open_stp) | ||
1079 | { | ||
1080 | struct nfs4_stateowner *lock_sop; | ||
1081 | |||
1082 | while (!list_empty(&open_stp->st_perlockowner)) { | ||
1083 | lock_sop = list_entry(open_stp->st_perlockowner.next, | ||
1084 | struct nfs4_stateowner, so_perlockowner); | ||
1085 | /* list_del(&open_stp->st_perlockowner); */ | ||
1086 | BUG_ON(lock_sop->so_is_open_owner); | ||
1087 | release_stateowner(lock_sop); | ||
1088 | } | ||
1089 | } | ||
1090 | |||
1091 | static void | ||
1092 | unhash_stateowner(struct nfs4_stateowner *sop) | ||
1093 | { | ||
1094 | struct nfs4_stateid *stp; | ||
1095 | |||
1096 | list_del(&sop->so_idhash); | ||
1097 | list_del(&sop->so_strhash); | ||
1098 | if (sop->so_is_open_owner) { | ||
1099 | list_del(&sop->so_perclient); | ||
1100 | del_perclient++; | ||
1101 | } | ||
1102 | list_del(&sop->so_perlockowner); | ||
1103 | while (!list_empty(&sop->so_perfilestate)) { | ||
1104 | stp = list_entry(sop->so_perfilestate.next, | ||
1105 | struct nfs4_stateid, st_perfilestate); | ||
1106 | if (sop->so_is_open_owner) | ||
1107 | release_stateid(stp, OPEN_STATE); | ||
1108 | else | ||
1109 | release_stateid(stp, LOCK_STATE); | ||
1110 | } | ||
1111 | } | ||
1112 | |||
1113 | static void | ||
1114 | release_stateowner(struct nfs4_stateowner *sop) | ||
1115 | { | ||
1116 | unhash_stateowner(sop); | ||
1117 | list_del(&sop->so_close_lru); | ||
1118 | nfs4_put_stateowner(sop); | ||
1119 | } | ||
1120 | |||
1121 | static inline void | ||
1122 | init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { | ||
1123 | struct nfs4_stateowner *sop = open->op_stateowner; | ||
1124 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); | ||
1125 | |||
1126 | INIT_LIST_HEAD(&stp->st_hash); | ||
1127 | INIT_LIST_HEAD(&stp->st_perfilestate); | ||
1128 | INIT_LIST_HEAD(&stp->st_perlockowner); | ||
1129 | INIT_LIST_HEAD(&stp->st_perfile); | ||
1130 | list_add(&stp->st_hash, &stateid_hashtbl[hashval]); | ||
1131 | list_add(&stp->st_perfilestate, &sop->so_perfilestate); | ||
1132 | list_add_perfile++; | ||
1133 | list_add(&stp->st_perfile, &fp->fi_perfile); | ||
1134 | stp->st_stateowner = sop; | ||
1135 | stp->st_file = fp; | ||
1136 | stp->st_stateid.si_boot = boot_time; | ||
1137 | stp->st_stateid.si_stateownerid = sop->so_id; | ||
1138 | stp->st_stateid.si_fileid = fp->fi_id; | ||
1139 | stp->st_stateid.si_generation = 0; | ||
1140 | stp->st_access_bmap = 0; | ||
1141 | stp->st_deny_bmap = 0; | ||
1142 | __set_bit(open->op_share_access, &stp->st_access_bmap); | ||
1143 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); | ||
1144 | } | ||
1145 | |||
1146 | static void | ||
1147 | release_stateid(struct nfs4_stateid *stp, int flags) | ||
1148 | { | ||
1149 | struct file *filp = stp->st_vfs_file; | ||
1150 | |||
1151 | list_del(&stp->st_hash); | ||
1152 | list_del_perfile++; | ||
1153 | list_del(&stp->st_perfile); | ||
1154 | list_del(&stp->st_perfilestate); | ||
1155 | if (flags & OPEN_STATE) { | ||
1156 | release_stateid_lockowners(stp); | ||
1157 | stp->st_vfs_file = NULL; | ||
1158 | nfsd_close(filp); | ||
1159 | vfsclose++; | ||
1160 | } else if (flags & LOCK_STATE) | ||
1161 | locks_remove_posix(filp, (fl_owner_t) stp->st_stateowner); | ||
1162 | kfree(stp); | ||
1163 | stp = NULL; | ||
1164 | } | ||
1165 | |||
1166 | static void | ||
1167 | release_file(struct nfs4_file *fp) | ||
1168 | { | ||
1169 | free_file++; | ||
1170 | list_del(&fp->fi_hash); | ||
1171 | iput(fp->fi_inode); | ||
1172 | kfree(fp); | ||
1173 | } | ||
1174 | |||
1175 | void | ||
1176 | move_to_close_lru(struct nfs4_stateowner *sop) | ||
1177 | { | ||
1178 | dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); | ||
1179 | |||
1180 | unhash_stateowner(sop); | ||
1181 | list_add_tail(&sop->so_close_lru, &close_lru); | ||
1182 | sop->so_time = get_seconds(); | ||
1183 | } | ||
1184 | |||
1185 | void | ||
1186 | release_state_owner(struct nfs4_stateid *stp, int flag) | ||
1187 | { | ||
1188 | struct nfs4_stateowner *sop = stp->st_stateowner; | ||
1189 | struct nfs4_file *fp = stp->st_file; | ||
1190 | |||
1191 | dprintk("NFSD: release_state_owner\n"); | ||
1192 | release_stateid(stp, flag); | ||
1193 | |||
1194 | /* place unused nfs4_stateowners on so_close_lru list to be | ||
1195 | * released by the laundromat service after the lease period | ||
1196 | * to enable us to handle CLOSE replay | ||
1197 | */ | ||
1198 | if (sop->so_confirmed && list_empty(&sop->so_perfilestate)) | ||
1199 | move_to_close_lru(sop); | ||
1200 | /* unused nfs4_file's are releseed. XXX slab cache? */ | ||
1201 | if (list_empty(&fp->fi_perfile) && list_empty(&fp->fi_del_perfile)) { | ||
1202 | release_file(fp); | ||
1203 | } | ||
1204 | } | ||
1205 | |||
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) { | ||
1233 | if (fp->fi_inode == ino) | ||
1234 | return fp; | ||
1235 | } | ||
1236 | return NULL; | ||
1237 | } | ||
1238 | |||
1239 | #define TEST_ACCESS(x) ((x > 0 || x < 4)?1:0) | ||
1240 | #define TEST_DENY(x) ((x >= 0 || x < 5)?1:0) | ||
1241 | |||
1242 | void | ||
1243 | set_access(unsigned int *access, unsigned long bmap) { | ||
1244 | int i; | ||
1245 | |||
1246 | *access = 0; | ||
1247 | for (i = 1; i < 4; i++) { | ||
1248 | if (test_bit(i, &bmap)) | ||
1249 | *access |= i; | ||
1250 | } | ||
1251 | } | ||
1252 | |||
1253 | void | ||
1254 | set_deny(unsigned int *deny, unsigned long bmap) { | ||
1255 | int i; | ||
1256 | |||
1257 | *deny = 0; | ||
1258 | for (i = 0; i < 4; i++) { | ||
1259 | if (test_bit(i, &bmap)) | ||
1260 | *deny |= i ; | ||
1261 | } | ||
1262 | } | ||
1263 | |||
1264 | static int | ||
1265 | test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { | ||
1266 | unsigned int access, deny; | ||
1267 | |||
1268 | set_access(&access, stp->st_access_bmap); | ||
1269 | set_deny(&deny, stp->st_deny_bmap); | ||
1270 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) | ||
1271 | return 0; | ||
1272 | return 1; | ||
1273 | } | ||
1274 | |||
1275 | /* | ||
1276 | * Called to check deny when READ with all zero stateid or | ||
1277 | * WRITE with all zero or all one stateid | ||
1278 | */ | ||
1279 | int | ||
1280 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) | ||
1281 | { | ||
1282 | struct inode *ino = current_fh->fh_dentry->d_inode; | ||
1283 | struct nfs4_file *fp; | ||
1284 | struct nfs4_stateid *stp; | ||
1285 | |||
1286 | dprintk("NFSD: nfs4_share_conflict\n"); | ||
1287 | |||
1288 | fp = find_file(ino); | ||
1289 | if (fp) { | ||
1290 | /* Search for conflicting share reservations */ | ||
1291 | list_for_each_entry(stp, &fp->fi_perfile, st_perfile) { | ||
1292 | if (test_bit(deny_type, &stp->st_deny_bmap) || | ||
1293 | test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) | ||
1294 | return nfserr_share_denied; | ||
1295 | } | ||
1296 | } | ||
1297 | return nfs_ok; | ||
1298 | } | ||
1299 | |||
1300 | static inline void | ||
1301 | nfs4_file_downgrade(struct file *filp, unsigned int share_access) | ||
1302 | { | ||
1303 | if (share_access & NFS4_SHARE_ACCESS_WRITE) { | ||
1304 | put_write_access(filp->f_dentry->d_inode); | ||
1305 | filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE; | ||
1306 | } | ||
1307 | } | ||
1308 | |||
1309 | /* | ||
1310 | * Recall a delegation | ||
1311 | */ | ||
1312 | static int | ||
1313 | do_recall(void *__dp) | ||
1314 | { | ||
1315 | struct nfs4_delegation *dp = __dp; | ||
1316 | |||
1317 | daemonize("nfsv4-recall"); | ||
1318 | |||
1319 | nfsd4_cb_recall(dp); | ||
1320 | return 0; | ||
1321 | } | ||
1322 | |||
1323 | /* | ||
1324 | * Spawn a thread to perform a recall on the delegation represented | ||
1325 | * by the lease (file_lock) | ||
1326 | * | ||
1327 | * Called from break_lease() with lock_kernel() held. | ||
1328 | * Note: we assume break_lease will only call this *once* for any given | ||
1329 | * lease. | ||
1330 | */ | ||
1331 | static | ||
1332 | void nfsd_break_deleg_cb(struct file_lock *fl) | ||
1333 | { | ||
1334 | struct nfs4_delegation *dp= (struct nfs4_delegation *)fl->fl_owner; | ||
1335 | struct task_struct *t; | ||
1336 | |||
1337 | dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl); | ||
1338 | if (!dp) | ||
1339 | return; | ||
1340 | |||
1341 | /* We're assuming the state code never drops its reference | ||
1342 | * without first removing the lease. Since we're in this lease | ||
1343 | * callback (and since the lease code is serialized by the kernel | ||
1344 | * lock) we know the server hasn't removed the lease yet, we know | ||
1345 | * it's safe to take a reference: */ | ||
1346 | atomic_inc(&dp->dl_count); | ||
1347 | |||
1348 | spin_lock(&recall_lock); | ||
1349 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); | ||
1350 | spin_unlock(&recall_lock); | ||
1351 | |||
1352 | /* only place dl_time is set. protected by lock_kernel*/ | ||
1353 | dp->dl_time = get_seconds(); | ||
1354 | |||
1355 | /* XXX need to merge NFSD_LEASE_TIME with fs/locks.c:lease_break_time */ | ||
1356 | fl->fl_break_time = jiffies + NFSD_LEASE_TIME * HZ; | ||
1357 | |||
1358 | t = kthread_run(do_recall, dp, "%s", "nfs4_cb_recall"); | ||
1359 | if (IS_ERR(t)) { | ||
1360 | struct nfs4_client *clp = dp->dl_client; | ||
1361 | |||
1362 | printk(KERN_INFO "NFSD: Callback thread failed for " | ||
1363 | "for client (clientid %08x/%08x)\n", | ||
1364 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | ||
1365 | nfs4_put_delegation(dp); | ||
1366 | } | ||
1367 | } | ||
1368 | |||
1369 | /* | ||
1370 | * The file_lock is being reapd. | ||
1371 | * | ||
1372 | * Called by locks_free_lock() with lock_kernel() held. | ||
1373 | */ | ||
1374 | static | ||
1375 | void nfsd_release_deleg_cb(struct file_lock *fl) | ||
1376 | { | ||
1377 | struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; | ||
1378 | |||
1379 | dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count)); | ||
1380 | |||
1381 | if (!(fl->fl_flags & FL_LEASE) || !dp) | ||
1382 | return; | ||
1383 | dp->dl_flock = NULL; | ||
1384 | } | ||
1385 | |||
1386 | /* | ||
1387 | * Set the delegation file_lock back pointer. | ||
1388 | * | ||
1389 | * Called from __setlease() with lock_kernel() held. | ||
1390 | */ | ||
1391 | static | ||
1392 | void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl) | ||
1393 | { | ||
1394 | struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner; | ||
1395 | |||
1396 | dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp); | ||
1397 | if (!dp) | ||
1398 | return; | ||
1399 | dp->dl_flock = new; | ||
1400 | } | ||
1401 | |||
1402 | /* | ||
1403 | * Called from __setlease() with lock_kernel() held | ||
1404 | */ | ||
1405 | static | ||
1406 | int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try) | ||
1407 | { | ||
1408 | struct nfs4_delegation *onlistd = | ||
1409 | (struct nfs4_delegation *)onlist->fl_owner; | ||
1410 | struct nfs4_delegation *tryd = | ||
1411 | (struct nfs4_delegation *)try->fl_owner; | ||
1412 | |||
1413 | if (onlist->fl_lmops != try->fl_lmops) | ||
1414 | return 0; | ||
1415 | |||
1416 | return onlistd->dl_client == tryd->dl_client; | ||
1417 | } | ||
1418 | |||
1419 | |||
1420 | static | ||
1421 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | ||
1422 | { | ||
1423 | if (arg & F_UNLCK) | ||
1424 | return lease_modify(onlist, arg); | ||
1425 | else | ||
1426 | return -EAGAIN; | ||
1427 | } | ||
1428 | |||
1429 | struct lock_manager_operations nfsd_lease_mng_ops = { | ||
1430 | .fl_break = nfsd_break_deleg_cb, | ||
1431 | .fl_release_private = nfsd_release_deleg_cb, | ||
1432 | .fl_copy_lock = nfsd_copy_lock_deleg_cb, | ||
1433 | .fl_mylease = nfsd_same_client_deleg_cb, | ||
1434 | .fl_change = nfsd_change_deleg_cb, | ||
1435 | }; | ||
1436 | |||
1437 | |||
1438 | /* | ||
1439 | * nfsd4_process_open1() | ||
1440 | * lookup stateowner. | ||
1441 | * found: | ||
1442 | * check confirmed | ||
1443 | * confirmed: | ||
1444 | * check seqid | ||
1445 | * not confirmed: | ||
1446 | * delete owner | ||
1447 | * create new owner | ||
1448 | * notfound: | ||
1449 | * verify clientid | ||
1450 | * create new owner | ||
1451 | * | ||
1452 | * called with nfs4_lock_state() held. | ||
1453 | */ | ||
1454 | int | ||
1455 | nfsd4_process_open1(struct nfsd4_open *open) | ||
1456 | { | ||
1457 | int status; | ||
1458 | clientid_t *clientid = &open->op_clientid; | ||
1459 | struct nfs4_client *clp = NULL; | ||
1460 | unsigned int strhashval; | ||
1461 | struct nfs4_stateowner *sop = NULL; | ||
1462 | |||
1463 | status = nfserr_inval; | ||
1464 | if (!check_name(open->op_owner)) | ||
1465 | goto out; | ||
1466 | |||
1467 | if (STALE_CLIENTID(&open->op_clientid)) | ||
1468 | return nfserr_stale_clientid; | ||
1469 | |||
1470 | strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner); | ||
1471 | sop = find_openstateowner_str(strhashval, open); | ||
1472 | if (sop) { | ||
1473 | open->op_stateowner = sop; | ||
1474 | /* check for replay */ | ||
1475 | if (open->op_seqid == sop->so_seqid){ | ||
1476 | if (sop->so_replay.rp_buflen) | ||
1477 | return NFSERR_REPLAY_ME; | ||
1478 | else { | ||
1479 | /* The original OPEN failed so spectacularly | ||
1480 | * that we don't even have replay data saved! | ||
1481 | * Therefore, we have no choice but to continue | ||
1482 | * processing this OPEN; presumably, we'll | ||
1483 | * fail again for the same reason. | ||
1484 | */ | ||
1485 | dprintk("nfsd4_process_open1:" | ||
1486 | " replay with no replay cache\n"); | ||
1487 | goto renew; | ||
1488 | } | ||
1489 | } else if (sop->so_confirmed) { | ||
1490 | if (open->op_seqid == sop->so_seqid + 1) | ||
1491 | goto renew; | ||
1492 | status = nfserr_bad_seqid; | ||
1493 | goto out; | ||
1494 | } else { | ||
1495 | /* If we get here, we received an OPEN for an | ||
1496 | * unconfirmed nfs4_stateowner. Since the seqid's are | ||
1497 | * different, purge the existing nfs4_stateowner, and | ||
1498 | * instantiate a new one. | ||
1499 | */ | ||
1500 | clp = sop->so_client; | ||
1501 | release_stateowner(sop); | ||
1502 | } | ||
1503 | } else { | ||
1504 | /* nfs4_stateowner not found. | ||
1505 | * Verify clientid and instantiate new nfs4_stateowner. | ||
1506 | * If verify fails this is presumably the result of the | ||
1507 | * client's lease expiring. | ||
1508 | */ | ||
1509 | status = nfserr_expired; | ||
1510 | clp = find_confirmed_client(clientid); | ||
1511 | if (clp == NULL) | ||
1512 | goto out; | ||
1513 | } | ||
1514 | status = nfserr_resource; | ||
1515 | sop = alloc_init_open_stateowner(strhashval, clp, open); | ||
1516 | if (sop == NULL) | ||
1517 | goto out; | ||
1518 | open->op_stateowner = sop; | ||
1519 | renew: | ||
1520 | status = nfs_ok; | ||
1521 | renew_client(sop->so_client); | ||
1522 | out: | ||
1523 | if (status && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) | ||
1524 | status = nfserr_reclaim_bad; | ||
1525 | return status; | ||
1526 | } | ||
1527 | |||
1528 | static int | ||
1529 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) | ||
1530 | { | ||
1531 | struct nfs4_stateid *local; | ||
1532 | int status = nfserr_share_denied; | ||
1533 | struct nfs4_stateowner *sop = open->op_stateowner; | ||
1534 | |||
1535 | list_for_each_entry(local, &fp->fi_perfile, st_perfile) { | ||
1536 | /* ignore lock owners */ | ||
1537 | if (local->st_stateowner->so_is_open_owner == 0) | ||
1538 | continue; | ||
1539 | /* remember if we have seen this open owner */ | ||
1540 | if (local->st_stateowner == sop) | ||
1541 | *stpp = local; | ||
1542 | /* check for conflicting share reservations */ | ||
1543 | if (!test_share(local, open)) | ||
1544 | goto out; | ||
1545 | } | ||
1546 | status = 0; | ||
1547 | out: | ||
1548 | return status; | ||
1549 | } | ||
1550 | |||
1551 | static int | ||
1552 | nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, | ||
1553 | struct svc_fh *cur_fh, int flags) | ||
1554 | { | ||
1555 | struct nfs4_stateid *stp; | ||
1556 | int status; | ||
1557 | |||
1558 | stp = kmalloc(sizeof(struct nfs4_stateid), GFP_KERNEL); | ||
1559 | if (stp == NULL) | ||
1560 | return nfserr_resource; | ||
1561 | |||
1562 | status = nfsd_open(rqstp, cur_fh, S_IFREG, flags, &stp->st_vfs_file); | ||
1563 | if (status) { | ||
1564 | if (status == nfserr_dropit) | ||
1565 | status = nfserr_jukebox; | ||
1566 | kfree(stp); | ||
1567 | return status; | ||
1568 | } | ||
1569 | vfsopen++; | ||
1570 | *stpp = stp; | ||
1571 | return 0; | ||
1572 | } | ||
1573 | |||
1574 | static inline int | ||
1575 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, | ||
1576 | struct nfsd4_open *open) | ||
1577 | { | ||
1578 | struct iattr iattr = { | ||
1579 | .ia_valid = ATTR_SIZE, | ||
1580 | .ia_size = 0, | ||
1581 | }; | ||
1582 | if (!open->op_truncate) | ||
1583 | return 0; | ||
1584 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | ||
1585 | return -EINVAL; | ||
1586 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); | ||
1587 | } | ||
1588 | |||
1589 | static int | ||
1590 | nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open) | ||
1591 | { | ||
1592 | struct file *filp = stp->st_vfs_file; | ||
1593 | struct inode *inode = filp->f_dentry->d_inode; | ||
1594 | unsigned int share_access; | ||
1595 | int status; | ||
1596 | |||
1597 | set_access(&share_access, stp->st_access_bmap); | ||
1598 | share_access = ~share_access; | ||
1599 | share_access &= open->op_share_access; | ||
1600 | |||
1601 | if (!(share_access & NFS4_SHARE_ACCESS_WRITE)) | ||
1602 | return nfsd4_truncate(rqstp, cur_fh, open); | ||
1603 | |||
1604 | status = get_write_access(inode); | ||
1605 | if (status) | ||
1606 | return nfserrno(status); | ||
1607 | status = nfsd4_truncate(rqstp, cur_fh, open); | ||
1608 | if (status) { | ||
1609 | put_write_access(inode); | ||
1610 | return status; | ||
1611 | } | ||
1612 | /* remember the open */ | ||
1613 | filp->f_mode = (filp->f_mode | FMODE_WRITE) & ~FMODE_READ; | ||
1614 | set_bit(open->op_share_access, &stp->st_access_bmap); | ||
1615 | set_bit(open->op_share_deny, &stp->st_deny_bmap); | ||
1616 | |||
1617 | return nfs_ok; | ||
1618 | } | ||
1619 | |||
1620 | |||
1621 | /* decrement seqid on successful reclaim, it will be bumped in encode_open */ | ||
1622 | static void | ||
1623 | nfs4_set_claim_prev(struct nfsd4_open *open, int *status) | ||
1624 | { | ||
1625 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) { | ||
1626 | if (*status) | ||
1627 | *status = nfserr_reclaim_bad; | ||
1628 | else { | ||
1629 | open->op_stateowner->so_confirmed = 1; | ||
1630 | open->op_stateowner->so_seqid--; | ||
1631 | } | ||
1632 | } | ||
1633 | } | ||
1634 | |||
1635 | /* | ||
1636 | * Attempt to hand out a delegation. | ||
1637 | */ | ||
1638 | static void | ||
1639 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) | ||
1640 | { | ||
1641 | struct nfs4_delegation *dp; | ||
1642 | struct nfs4_stateowner *sop = stp->st_stateowner; | ||
1643 | struct nfs4_callback *cb = &sop->so_client->cl_callback; | ||
1644 | struct file_lock fl, *flp = &fl; | ||
1645 | int status, flag = 0; | ||
1646 | |||
1647 | flag = NFS4_OPEN_DELEGATE_NONE; | ||
1648 | if (open->op_claim_type != NFS4_OPEN_CLAIM_NULL | ||
1649 | || !atomic_read(&cb->cb_set) || !sop->so_confirmed) | ||
1650 | goto out; | ||
1651 | |||
1652 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | ||
1653 | flag = NFS4_OPEN_DELEGATE_WRITE; | ||
1654 | else | ||
1655 | flag = NFS4_OPEN_DELEGATE_READ; | ||
1656 | |||
1657 | dp = alloc_init_deleg(sop->so_client, stp, fh, flag); | ||
1658 | if (dp == NULL) { | ||
1659 | flag = NFS4_OPEN_DELEGATE_NONE; | ||
1660 | goto out; | ||
1661 | } | ||
1662 | locks_init_lock(&fl); | ||
1663 | fl.fl_lmops = &nfsd_lease_mng_ops; | ||
1664 | fl.fl_flags = FL_LEASE; | ||
1665 | fl.fl_end = OFFSET_MAX; | ||
1666 | fl.fl_owner = (fl_owner_t)dp; | ||
1667 | fl.fl_file = stp->st_vfs_file; | ||
1668 | fl.fl_pid = current->tgid; | ||
1669 | |||
1670 | /* setlease checks to see if delegation should be handed out. | ||
1671 | * the lock_manager callbacks fl_mylease and fl_change are used | ||
1672 | */ | ||
1673 | if ((status = setlease(stp->st_vfs_file, | ||
1674 | flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK, &flp))) { | ||
1675 | dprintk("NFSD: setlease failed [%d], no delegation\n", status); | ||
1676 | list_del(&dp->dl_del_perfile); | ||
1677 | list_del(&dp->dl_del_perclnt); | ||
1678 | nfs4_put_delegation(dp); | ||
1679 | free_delegation++; | ||
1680 | flag = NFS4_OPEN_DELEGATE_NONE; | ||
1681 | goto out; | ||
1682 | } | ||
1683 | |||
1684 | memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); | ||
1685 | |||
1686 | dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n", | ||
1687 | dp->dl_stateid.si_boot, | ||
1688 | dp->dl_stateid.si_stateownerid, | ||
1689 | dp->dl_stateid.si_fileid, | ||
1690 | dp->dl_stateid.si_generation); | ||
1691 | out: | ||
1692 | open->op_delegate_type = flag; | ||
1693 | } | ||
1694 | |||
1695 | /* | ||
1696 | * called with nfs4_lock_state() held. | ||
1697 | */ | ||
1698 | int | ||
1699 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) | ||
1700 | { | ||
1701 | struct nfs4_file *fp = NULL; | ||
1702 | struct inode *ino = current_fh->fh_dentry->d_inode; | ||
1703 | struct nfs4_stateid *stp = NULL; | ||
1704 | int status; | ||
1705 | |||
1706 | status = nfserr_inval; | ||
1707 | if (!TEST_ACCESS(open->op_share_access) || !TEST_DENY(open->op_share_deny)) | ||
1708 | goto out; | ||
1709 | /* | ||
1710 | * Lookup file; if found, lookup stateid and check open request, | ||
1711 | * and check for delegations in the process of being recalled. | ||
1712 | * If not found, create the nfs4_file struct | ||
1713 | */ | ||
1714 | fp = find_file(ino); | ||
1715 | if (fp) { | ||
1716 | if ((status = nfs4_check_open(fp, open, &stp))) | ||
1717 | goto out; | ||
1718 | } else { | ||
1719 | status = nfserr_resource; | ||
1720 | fp = alloc_init_file(ino); | ||
1721 | if (fp == NULL) | ||
1722 | goto out; | ||
1723 | } | ||
1724 | |||
1725 | /* | ||
1726 | * OPEN the file, or upgrade an existing OPEN. | ||
1727 | * If truncate fails, the OPEN fails. | ||
1728 | */ | ||
1729 | if (stp) { | ||
1730 | /* Stateid was found, this is an OPEN upgrade */ | ||
1731 | status = nfs4_upgrade_open(rqstp, current_fh, stp, open); | ||
1732 | if (status) | ||
1733 | goto out; | ||
1734 | } else { | ||
1735 | /* Stateid was not found, this is a new OPEN */ | ||
1736 | int flags = 0; | ||
1737 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | ||
1738 | flags = MAY_WRITE; | ||
1739 | else | ||
1740 | flags = MAY_READ; | ||
1741 | if ((status = nfs4_new_open(rqstp, &stp, current_fh, flags))) | ||
1742 | goto out; | ||
1743 | init_stateid(stp, fp, open); | ||
1744 | status = nfsd4_truncate(rqstp, current_fh, open); | ||
1745 | if (status) { | ||
1746 | release_stateid(stp, OPEN_STATE); | ||
1747 | goto out; | ||
1748 | } | ||
1749 | } | ||
1750 | memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); | ||
1751 | |||
1752 | /* | ||
1753 | * Attempt to hand out a delegation. No error return, because the | ||
1754 | * OPEN succeeds even if we fail. | ||
1755 | */ | ||
1756 | nfs4_open_delegation(current_fh, open, stp); | ||
1757 | |||
1758 | status = nfs_ok; | ||
1759 | |||
1760 | dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n", | ||
1761 | stp->st_stateid.si_boot, stp->st_stateid.si_stateownerid, | ||
1762 | stp->st_stateid.si_fileid, stp->st_stateid.si_generation); | ||
1763 | out: | ||
1764 | /* take the opportunity to clean up unused state */ | ||
1765 | if (fp && list_empty(&fp->fi_perfile) && list_empty(&fp->fi_del_perfile)) | ||
1766 | release_file(fp); | ||
1767 | |||
1768 | /* CLAIM_PREVIOUS has different error returns */ | ||
1769 | nfs4_set_claim_prev(open, &status); | ||
1770 | /* | ||
1771 | * To finish the open response, we just need to set the rflags. | ||
1772 | */ | ||
1773 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | ||
1774 | if (!open->op_stateowner->so_confirmed) | ||
1775 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; | ||
1776 | |||
1777 | return status; | ||
1778 | } | ||
1779 | |||
1780 | static struct work_struct laundromat_work; | ||
1781 | static void laundromat_main(void *); | ||
1782 | static DECLARE_WORK(laundromat_work, laundromat_main, NULL); | ||
1783 | |||
1784 | int | ||
1785 | nfsd4_renew(clientid_t *clid) | ||
1786 | { | ||
1787 | struct nfs4_client *clp; | ||
1788 | int status; | ||
1789 | |||
1790 | nfs4_lock_state(); | ||
1791 | dprintk("process_renew(%08x/%08x): starting\n", | ||
1792 | clid->cl_boot, clid->cl_id); | ||
1793 | status = nfserr_stale_clientid; | ||
1794 | if (STALE_CLIENTID(clid)) | ||
1795 | goto out; | ||
1796 | clp = find_confirmed_client(clid); | ||
1797 | status = nfserr_expired; | ||
1798 | if (clp == NULL) { | ||
1799 | /* We assume the client took too long to RENEW. */ | ||
1800 | dprintk("nfsd4_renew: clientid not found!\n"); | ||
1801 | goto out; | ||
1802 | } | ||
1803 | renew_client(clp); | ||
1804 | status = nfserr_cb_path_down; | ||
1805 | if (!list_empty(&clp->cl_del_perclnt) | ||
1806 | && !atomic_read(&clp->cl_callback.cb_set)) | ||
1807 | goto out; | ||
1808 | status = nfs_ok; | ||
1809 | out: | ||
1810 | nfs4_unlock_state(); | ||
1811 | return status; | ||
1812 | } | ||
1813 | |||
1814 | time_t | ||
1815 | nfs4_laundromat(void) | ||
1816 | { | ||
1817 | struct nfs4_client *clp; | ||
1818 | struct nfs4_stateowner *sop; | ||
1819 | struct nfs4_delegation *dp; | ||
1820 | struct list_head *pos, *next, reaplist; | ||
1821 | time_t cutoff = get_seconds() - NFSD_LEASE_TIME; | ||
1822 | time_t t, clientid_val = NFSD_LEASE_TIME; | ||
1823 | time_t u, test_val = NFSD_LEASE_TIME; | ||
1824 | |||
1825 | nfs4_lock_state(); | ||
1826 | |||
1827 | dprintk("NFSD: laundromat service - starting\n"); | ||
1828 | list_for_each_safe(pos, next, &client_lru) { | ||
1829 | clp = list_entry(pos, struct nfs4_client, cl_lru); | ||
1830 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | ||
1831 | t = clp->cl_time - cutoff; | ||
1832 | if (clientid_val > t) | ||
1833 | clientid_val = t; | ||
1834 | break; | ||
1835 | } | ||
1836 | dprintk("NFSD: purging unused client (clientid %08x)\n", | ||
1837 | clp->cl_clientid.cl_id); | ||
1838 | expire_client(clp); | ||
1839 | } | ||
1840 | INIT_LIST_HEAD(&reaplist); | ||
1841 | spin_lock(&recall_lock); | ||
1842 | list_for_each_safe(pos, next, &del_recall_lru) { | ||
1843 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | ||
1844 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | ||
1845 | u = dp->dl_time - cutoff; | ||
1846 | if (test_val > u) | ||
1847 | test_val = u; | ||
1848 | break; | ||
1849 | } | ||
1850 | dprintk("NFSD: purging unused delegation dp %p, fp %p\n", | ||
1851 | dp, dp->dl_flock); | ||
1852 | list_move(&dp->dl_recall_lru, &reaplist); | ||
1853 | } | ||
1854 | spin_unlock(&recall_lock); | ||
1855 | list_for_each_safe(pos, next, &reaplist) { | ||
1856 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | ||
1857 | list_del_init(&dp->dl_recall_lru); | ||
1858 | unhash_delegation(dp); | ||
1859 | } | ||
1860 | test_val = NFSD_LEASE_TIME; | ||
1861 | list_for_each_safe(pos, next, &close_lru) { | ||
1862 | sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); | ||
1863 | if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { | ||
1864 | u = sop->so_time - cutoff; | ||
1865 | if (test_val > u) | ||
1866 | test_val = u; | ||
1867 | break; | ||
1868 | } | ||
1869 | dprintk("NFSD: purging unused open stateowner (so_id %d)\n", | ||
1870 | sop->so_id); | ||
1871 | list_del(&sop->so_close_lru); | ||
1872 | nfs4_put_stateowner(sop); | ||
1873 | } | ||
1874 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | ||
1875 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | ||
1876 | nfs4_unlock_state(); | ||
1877 | return clientid_val; | ||
1878 | } | ||
1879 | |||
1880 | void | ||
1881 | laundromat_main(void *not_used) | ||
1882 | { | ||
1883 | time_t t; | ||
1884 | |||
1885 | t = nfs4_laundromat(); | ||
1886 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); | ||
1887 | schedule_delayed_work(&laundromat_work, t*HZ); | ||
1888 | } | ||
1889 | |||
1890 | /* search ownerid_hashtbl[] and close_lru for stateid owner | ||
1891 | * (stateid->si_stateownerid) | ||
1892 | */ | ||
1893 | struct nfs4_stateowner * | ||
1894 | find_openstateowner_id(u32 st_id, int flags) { | ||
1895 | struct nfs4_stateowner *local = NULL; | ||
1896 | |||
1897 | dprintk("NFSD: find_openstateowner_id %d\n", st_id); | ||
1898 | if (flags & CLOSE_STATE) { | ||
1899 | list_for_each_entry(local, &close_lru, so_close_lru) { | ||
1900 | if (local->so_id == st_id) | ||
1901 | return local; | ||
1902 | } | ||
1903 | } | ||
1904 | return NULL; | ||
1905 | } | ||
1906 | |||
1907 | static inline int | ||
1908 | nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) | ||
1909 | { | ||
1910 | return fhp->fh_dentry->d_inode != stp->st_vfs_file->f_dentry->d_inode; | ||
1911 | } | ||
1912 | |||
1913 | static int | ||
1914 | STALE_STATEID(stateid_t *stateid) | ||
1915 | { | ||
1916 | if (stateid->si_boot == boot_time) | ||
1917 | return 0; | ||
1918 | printk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n", | ||
1919 | stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, | ||
1920 | stateid->si_generation); | ||
1921 | return 1; | ||
1922 | } | ||
1923 | |||
1924 | static inline int | ||
1925 | access_permit_read(unsigned long access_bmap) | ||
1926 | { | ||
1927 | return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || | ||
1928 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || | ||
1929 | test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); | ||
1930 | } | ||
1931 | |||
1932 | static inline int | ||
1933 | access_permit_write(unsigned long access_bmap) | ||
1934 | { | ||
1935 | return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || | ||
1936 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); | ||
1937 | } | ||
1938 | |||
1939 | static | ||
1940 | int nfs4_check_openmode(struct nfs4_stateid *stp, int flags) | ||
1941 | { | ||
1942 | int status = nfserr_openmode; | ||
1943 | |||
1944 | if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) | ||
1945 | goto out; | ||
1946 | if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) | ||
1947 | goto out; | ||
1948 | status = nfs_ok; | ||
1949 | out: | ||
1950 | return status; | ||
1951 | } | ||
1952 | |||
1953 | static inline int | ||
1954 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) | ||
1955 | { | ||
1956 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | ||
1957 | return nfserr_openmode; | ||
1958 | else | ||
1959 | return nfs_ok; | ||
1960 | } | ||
1961 | |||
1962 | static inline int | ||
1963 | check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) | ||
1964 | { | ||
1965 | /* Trying to call delegreturn with a special stateid? Yuch: */ | ||
1966 | if (!(flags & (RD_STATE | WR_STATE))) | ||
1967 | return nfserr_bad_stateid; | ||
1968 | else if (ONE_STATEID(stateid) && (flags & RD_STATE)) | ||
1969 | return nfs_ok; | ||
1970 | else if (nfs4_in_grace()) { | ||
1971 | /* Answer in remaining cases depends on existance of | ||
1972 | * conflicting state; so we must wait out the grace period. */ | ||
1973 | return nfserr_grace; | ||
1974 | } else if (flags & WR_STATE) | ||
1975 | return nfs4_share_conflict(current_fh, | ||
1976 | NFS4_SHARE_DENY_WRITE); | ||
1977 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | ||
1978 | return nfs4_share_conflict(current_fh, | ||
1979 | NFS4_SHARE_DENY_READ); | ||
1980 | } | ||
1981 | |||
1982 | /* | ||
1983 | * Allow READ/WRITE during grace period on recovered state only for files | ||
1984 | * that are not able to provide mandatory locking. | ||
1985 | */ | ||
1986 | static inline int | ||
1987 | io_during_grace_disallowed(struct inode *inode, int flags) | ||
1988 | { | ||
1989 | return nfs4_in_grace() && (flags & (RD_STATE | WR_STATE)) | ||
1990 | && MANDATORY_LOCK(inode); | ||
1991 | } | ||
1992 | |||
1993 | /* | ||
1994 | * Checks for stateid operations | ||
1995 | */ | ||
1996 | int | ||
1997 | nfs4_preprocess_stateid_op(struct svc_fh *current_fh, stateid_t *stateid, int flags, struct file **filpp) | ||
1998 | { | ||
1999 | struct nfs4_stateid *stp = NULL; | ||
2000 | struct nfs4_delegation *dp = NULL; | ||
2001 | stateid_t *stidp; | ||
2002 | struct inode *ino = current_fh->fh_dentry->d_inode; | ||
2003 | int status; | ||
2004 | |||
2005 | dprintk("NFSD: preprocess_stateid_op: stateid = (%08x/%08x/%08x/%08x)\n", | ||
2006 | stateid->si_boot, stateid->si_stateownerid, | ||
2007 | stateid->si_fileid, stateid->si_generation); | ||
2008 | if (filpp) | ||
2009 | *filpp = NULL; | ||
2010 | |||
2011 | if (io_during_grace_disallowed(ino, flags)) | ||
2012 | return nfserr_grace; | ||
2013 | |||
2014 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | ||
2015 | return check_special_stateids(current_fh, stateid, flags); | ||
2016 | |||
2017 | /* STALE STATEID */ | ||
2018 | status = nfserr_stale_stateid; | ||
2019 | if (STALE_STATEID(stateid)) | ||
2020 | goto out; | ||
2021 | |||
2022 | /* BAD STATEID */ | ||
2023 | status = nfserr_bad_stateid; | ||
2024 | if (!stateid->si_fileid) { /* delegation stateid */ | ||
2025 | if(!(dp = find_delegation_stateid(ino, stateid))) { | ||
2026 | dprintk("NFSD: delegation stateid not found\n"); | ||
2027 | if (nfs4_in_grace()) | ||
2028 | status = nfserr_grace; | ||
2029 | goto out; | ||
2030 | } | ||
2031 | stidp = &dp->dl_stateid; | ||
2032 | } else { /* open or lock stateid */ | ||
2033 | if (!(stp = find_stateid(stateid, flags))) { | ||
2034 | dprintk("NFSD: open or lock stateid not found\n"); | ||
2035 | if (nfs4_in_grace()) | ||
2036 | status = nfserr_grace; | ||
2037 | goto out; | ||
2038 | } | ||
2039 | if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp)) | ||
2040 | goto out; | ||
2041 | if (!stp->st_stateowner->so_confirmed) | ||
2042 | goto out; | ||
2043 | stidp = &stp->st_stateid; | ||
2044 | } | ||
2045 | if (stateid->si_generation > stidp->si_generation) | ||
2046 | goto out; | ||
2047 | |||
2048 | /* OLD STATEID */ | ||
2049 | status = nfserr_old_stateid; | ||
2050 | if (stateid->si_generation < stidp->si_generation) | ||
2051 | goto out; | ||
2052 | if (stp) { | ||
2053 | if ((status = nfs4_check_openmode(stp,flags))) | ||
2054 | goto out; | ||
2055 | renew_client(stp->st_stateowner->so_client); | ||
2056 | if (filpp) | ||
2057 | *filpp = stp->st_vfs_file; | ||
2058 | } else if (dp) { | ||
2059 | if ((status = nfs4_check_delegmode(dp, flags))) | ||
2060 | goto out; | ||
2061 | renew_client(dp->dl_client); | ||
2062 | if (flags & DELEG_RET) | ||
2063 | unhash_delegation(dp); | ||
2064 | if (filpp) | ||
2065 | *filpp = dp->dl_vfs_file; | ||
2066 | } | ||
2067 | status = nfs_ok; | ||
2068 | out: | ||
2069 | return status; | ||
2070 | } | ||
2071 | |||
2072 | |||
2073 | /* | ||
2074 | * Checks for sequence id mutating operations. | ||
2075 | */ | ||
2076 | int | ||
2077 | nfs4_preprocess_seqid_op(struct svc_fh *current_fh, u32 seqid, stateid_t *stateid, int flags, struct nfs4_stateowner **sopp, struct nfs4_stateid **stpp, clientid_t *lockclid) | ||
2078 | { | ||
2079 | int status; | ||
2080 | struct nfs4_stateid *stp; | ||
2081 | struct nfs4_stateowner *sop; | ||
2082 | |||
2083 | dprintk("NFSD: preprocess_seqid_op: seqid=%d " | ||
2084 | "stateid = (%08x/%08x/%08x/%08x)\n", seqid, | ||
2085 | stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, | ||
2086 | stateid->si_generation); | ||
2087 | |||
2088 | *stpp = NULL; | ||
2089 | *sopp = NULL; | ||
2090 | |||
2091 | status = nfserr_bad_stateid; | ||
2092 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { | ||
2093 | printk("NFSD: preprocess_seqid_op: magic stateid!\n"); | ||
2094 | goto out; | ||
2095 | } | ||
2096 | |||
2097 | status = nfserr_stale_stateid; | ||
2098 | if (STALE_STATEID(stateid)) | ||
2099 | goto out; | ||
2100 | /* | ||
2101 | * We return BAD_STATEID if filehandle doesn't match stateid, | ||
2102 | * the confirmed flag is incorrecly set, or the generation | ||
2103 | * number is incorrect. | ||
2104 | * If there is no entry in the openfile table for this id, | ||
2105 | * we can't always return BAD_STATEID; | ||
2106 | * this might be a retransmitted CLOSE which has arrived after | ||
2107 | * the openfile has been released. | ||
2108 | */ | ||
2109 | if (!(stp = find_stateid(stateid, flags))) | ||
2110 | goto no_nfs4_stateid; | ||
2111 | |||
2112 | status = nfserr_bad_stateid; | ||
2113 | |||
2114 | /* for new lock stateowners: | ||
2115 | * check that the lock->v.new.open_stateid | ||
2116 | * refers to an open stateowner | ||
2117 | * | ||
2118 | * check that the lockclid (nfs4_lock->v.new.clientid) is the same | ||
2119 | * as the open_stateid->st_stateowner->so_client->clientid | ||
2120 | */ | ||
2121 | if (lockclid) { | ||
2122 | struct nfs4_stateowner *sop = stp->st_stateowner; | ||
2123 | struct nfs4_client *clp = sop->so_client; | ||
2124 | |||
2125 | if (!sop->so_is_open_owner) | ||
2126 | goto out; | ||
2127 | if (!cmp_clid(&clp->cl_clientid, lockclid)) | ||
2128 | goto out; | ||
2129 | } | ||
2130 | |||
2131 | if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp)) { | ||
2132 | printk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); | ||
2133 | goto out; | ||
2134 | } | ||
2135 | |||
2136 | *stpp = stp; | ||
2137 | *sopp = sop = stp->st_stateowner; | ||
2138 | |||
2139 | /* | ||
2140 | * We now validate the seqid and stateid generation numbers. | ||
2141 | * For the moment, we ignore the possibility of | ||
2142 | * generation number wraparound. | ||
2143 | */ | ||
2144 | if (seqid != sop->so_seqid + 1) | ||
2145 | goto check_replay; | ||
2146 | |||
2147 | if (sop->so_confirmed) { | ||
2148 | if (flags & CONFIRM) { | ||
2149 | printk("NFSD: preprocess_seqid_op: expected unconfirmed stateowner!\n"); | ||
2150 | goto out; | ||
2151 | } | ||
2152 | } | ||
2153 | else { | ||
2154 | if (!(flags & CONFIRM)) { | ||
2155 | printk("NFSD: preprocess_seqid_op: stateowner not confirmed yet!\n"); | ||
2156 | goto out; | ||
2157 | } | ||
2158 | } | ||
2159 | if (stateid->si_generation > stp->st_stateid.si_generation) { | ||
2160 | printk("NFSD: preprocess_seqid_op: future stateid?!\n"); | ||
2161 | goto out; | ||
2162 | } | ||
2163 | |||
2164 | status = nfserr_old_stateid; | ||
2165 | if (stateid->si_generation < stp->st_stateid.si_generation) { | ||
2166 | printk("NFSD: preprocess_seqid_op: old stateid!\n"); | ||
2167 | goto out; | ||
2168 | } | ||
2169 | /* XXX renew the client lease here */ | ||
2170 | status = nfs_ok; | ||
2171 | |||
2172 | out: | ||
2173 | return status; | ||
2174 | |||
2175 | no_nfs4_stateid: | ||
2176 | |||
2177 | /* | ||
2178 | * We determine whether this is a bad stateid or a replay, | ||
2179 | * starting by trying to look up the stateowner. | ||
2180 | * If stateowner is not found - stateid is bad. | ||
2181 | */ | ||
2182 | if (!(sop = find_openstateowner_id(stateid->si_stateownerid, flags))) { | ||
2183 | printk("NFSD: preprocess_seqid_op: no stateowner or nfs4_stateid!\n"); | ||
2184 | status = nfserr_bad_stateid; | ||
2185 | goto out; | ||
2186 | } | ||
2187 | *sopp = sop; | ||
2188 | |||
2189 | check_replay: | ||
2190 | if (seqid == sop->so_seqid) { | ||
2191 | printk("NFSD: preprocess_seqid_op: retransmission?\n"); | ||
2192 | /* indicate replay to calling function */ | ||
2193 | status = NFSERR_REPLAY_ME; | ||
2194 | } else { | ||
2195 | printk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d\n", sop->so_seqid +1, seqid); | ||
2196 | |||
2197 | *sopp = NULL; | ||
2198 | status = nfserr_bad_seqid; | ||
2199 | } | ||
2200 | goto out; | ||
2201 | } | ||
2202 | |||
2203 | int | ||
2204 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open_confirm *oc) | ||
2205 | { | ||
2206 | int status; | ||
2207 | struct nfs4_stateowner *sop; | ||
2208 | struct nfs4_stateid *stp; | ||
2209 | |||
2210 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | ||
2211 | (int)current_fh->fh_dentry->d_name.len, | ||
2212 | current_fh->fh_dentry->d_name.name); | ||
2213 | |||
2214 | if ((status = fh_verify(rqstp, current_fh, S_IFREG, 0))) | ||
2215 | goto out; | ||
2216 | |||
2217 | nfs4_lock_state(); | ||
2218 | |||
2219 | if ((status = nfs4_preprocess_seqid_op(current_fh, oc->oc_seqid, | ||
2220 | &oc->oc_req_stateid, | ||
2221 | CHECK_FH | CONFIRM | OPEN_STATE, | ||
2222 | &oc->oc_stateowner, &stp, NULL))) | ||
2223 | goto out; | ||
2224 | |||
2225 | sop = oc->oc_stateowner; | ||
2226 | sop->so_confirmed = 1; | ||
2227 | update_stateid(&stp->st_stateid); | ||
2228 | memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); | ||
2229 | dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d " | ||
2230 | "stateid=(%08x/%08x/%08x/%08x)\n", oc->oc_seqid, | ||
2231 | stp->st_stateid.si_boot, | ||
2232 | stp->st_stateid.si_stateownerid, | ||
2233 | stp->st_stateid.si_fileid, | ||
2234 | stp->st_stateid.si_generation); | ||
2235 | out: | ||
2236 | if (oc->oc_stateowner) | ||
2237 | nfs4_get_stateowner(oc->oc_stateowner); | ||
2238 | nfs4_unlock_state(); | ||
2239 | return status; | ||
2240 | } | ||
2241 | |||
2242 | |||
2243 | /* | ||
2244 | * unset all bits in union bitmap (bmap) that | ||
2245 | * do not exist in share (from successful OPEN_DOWNGRADE) | ||
2246 | */ | ||
2247 | static void | ||
2248 | reset_union_bmap_access(unsigned long access, unsigned long *bmap) | ||
2249 | { | ||
2250 | int i; | ||
2251 | for (i = 1; i < 4; i++) { | ||
2252 | if ((i & access) != i) | ||
2253 | __clear_bit(i, bmap); | ||
2254 | } | ||
2255 | } | ||
2256 | |||
2257 | static void | ||
2258 | reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) | ||
2259 | { | ||
2260 | int i; | ||
2261 | for (i = 0; i < 4; i++) { | ||
2262 | if ((i & deny) != i) | ||
2263 | __clear_bit(i, bmap); | ||
2264 | } | ||
2265 | } | ||
2266 | |||
2267 | int | ||
2268 | nfsd4_open_downgrade(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open_downgrade *od) | ||
2269 | { | ||
2270 | int status; | ||
2271 | struct nfs4_stateid *stp; | ||
2272 | unsigned int share_access; | ||
2273 | |||
2274 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | ||
2275 | (int)current_fh->fh_dentry->d_name.len, | ||
2276 | current_fh->fh_dentry->d_name.name); | ||
2277 | |||
2278 | if (!TEST_ACCESS(od->od_share_access) || !TEST_DENY(od->od_share_deny)) | ||
2279 | return nfserr_inval; | ||
2280 | |||
2281 | nfs4_lock_state(); | ||
2282 | if ((status = nfs4_preprocess_seqid_op(current_fh, od->od_seqid, | ||
2283 | &od->od_stateid, | ||
2284 | CHECK_FH | OPEN_STATE, | ||
2285 | &od->od_stateowner, &stp, NULL))) | ||
2286 | goto out; | ||
2287 | |||
2288 | status = nfserr_inval; | ||
2289 | if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { | ||
2290 | dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", | ||
2291 | stp->st_access_bmap, od->od_share_access); | ||
2292 | goto out; | ||
2293 | } | ||
2294 | if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { | ||
2295 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", | ||
2296 | stp->st_deny_bmap, od->od_share_deny); | ||
2297 | goto out; | ||
2298 | } | ||
2299 | set_access(&share_access, stp->st_access_bmap); | ||
2300 | nfs4_file_downgrade(stp->st_vfs_file, | ||
2301 | share_access & ~od->od_share_access); | ||
2302 | |||
2303 | reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap); | ||
2304 | reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); | ||
2305 | |||
2306 | update_stateid(&stp->st_stateid); | ||
2307 | memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); | ||
2308 | status = nfs_ok; | ||
2309 | out: | ||
2310 | if (od->od_stateowner) | ||
2311 | nfs4_get_stateowner(od->od_stateowner); | ||
2312 | nfs4_unlock_state(); | ||
2313 | return status; | ||
2314 | } | ||
2315 | |||
2316 | /* | ||
2317 | * nfs4_unlock_state() called after encode | ||
2318 | */ | ||
2319 | int | ||
2320 | nfsd4_close(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_close *close) | ||
2321 | { | ||
2322 | int status; | ||
2323 | struct nfs4_stateid *stp; | ||
2324 | |||
2325 | dprintk("NFSD: nfsd4_close on file %.*s\n", | ||
2326 | (int)current_fh->fh_dentry->d_name.len, | ||
2327 | current_fh->fh_dentry->d_name.name); | ||
2328 | |||
2329 | nfs4_lock_state(); | ||
2330 | /* check close_lru for replay */ | ||
2331 | if ((status = nfs4_preprocess_seqid_op(current_fh, close->cl_seqid, | ||
2332 | &close->cl_stateid, | ||
2333 | CHECK_FH | OPEN_STATE | CLOSE_STATE, | ||
2334 | &close->cl_stateowner, &stp, NULL))) | ||
2335 | goto out; | ||
2336 | /* | ||
2337 | * Return success, but first update the stateid. | ||
2338 | */ | ||
2339 | status = nfs_ok; | ||
2340 | update_stateid(&stp->st_stateid); | ||
2341 | memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); | ||
2342 | |||
2343 | /* release_state_owner() calls nfsd_close() if needed */ | ||
2344 | release_state_owner(stp, OPEN_STATE); | ||
2345 | out: | ||
2346 | if (close->cl_stateowner) | ||
2347 | nfs4_get_stateowner(close->cl_stateowner); | ||
2348 | nfs4_unlock_state(); | ||
2349 | return status; | ||
2350 | } | ||
2351 | |||
2352 | int | ||
2353 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_delegreturn *dr) | ||
2354 | { | ||
2355 | int status; | ||
2356 | |||
2357 | if ((status = fh_verify(rqstp, current_fh, S_IFREG, 0))) | ||
2358 | goto out; | ||
2359 | |||
2360 | nfs4_lock_state(); | ||
2361 | status = nfs4_preprocess_stateid_op(current_fh, &dr->dr_stateid, DELEG_RET, NULL); | ||
2362 | nfs4_unlock_state(); | ||
2363 | out: | ||
2364 | return status; | ||
2365 | } | ||
2366 | |||
2367 | |||
2368 | /* | ||
2369 | * Lock owner state (byte-range locks) | ||
2370 | */ | ||
2371 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) | ||
2372 | #define LOCK_HASH_BITS 8 | ||
2373 | #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) | ||
2374 | #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) | ||
2375 | |||
2376 | #define lockownerid_hashval(id) \ | ||
2377 | ((id) & LOCK_HASH_MASK) | ||
2378 | |||
2379 | static inline unsigned int | ||
2380 | lock_ownerstr_hashval(struct inode *inode, u32 cl_id, | ||
2381 | struct xdr_netobj *ownername) | ||
2382 | { | ||
2383 | return (file_hashval(inode) + cl_id | ||
2384 | + opaque_hashval(ownername->data, ownername->len)) | ||
2385 | & LOCK_HASH_MASK; | ||
2386 | } | ||
2387 | |||
2388 | static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; | ||
2389 | static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; | ||
2390 | static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; | ||
2391 | |||
2392 | struct nfs4_stateid * | ||
2393 | find_stateid(stateid_t *stid, int flags) | ||
2394 | { | ||
2395 | struct nfs4_stateid *local = NULL; | ||
2396 | u32 st_id = stid->si_stateownerid; | ||
2397 | u32 f_id = stid->si_fileid; | ||
2398 | unsigned int hashval; | ||
2399 | |||
2400 | dprintk("NFSD: find_stateid flags 0x%x\n",flags); | ||
2401 | if ((flags & LOCK_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) { | ||
2402 | hashval = stateid_hashval(st_id, f_id); | ||
2403 | list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { | ||
2404 | if ((local->st_stateid.si_stateownerid == st_id) && | ||
2405 | (local->st_stateid.si_fileid == f_id)) | ||
2406 | return local; | ||
2407 | } | ||
2408 | } | ||
2409 | if ((flags & OPEN_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) { | ||
2410 | hashval = stateid_hashval(st_id, f_id); | ||
2411 | list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { | ||
2412 | if ((local->st_stateid.si_stateownerid == st_id) && | ||
2413 | (local->st_stateid.si_fileid == f_id)) | ||
2414 | return local; | ||
2415 | } | ||
2416 | } else | ||
2417 | printk("NFSD: find_stateid: ERROR: no state flag\n"); | ||
2418 | return NULL; | ||
2419 | } | ||
2420 | |||
2421 | static struct nfs4_delegation * | ||
2422 | find_delegation_stateid(struct inode *ino, stateid_t *stid) | ||
2423 | { | ||
2424 | struct nfs4_delegation *dp = NULL; | ||
2425 | struct nfs4_file *fp = NULL; | ||
2426 | u32 st_id; | ||
2427 | |||
2428 | dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n", | ||
2429 | stid->si_boot, stid->si_stateownerid, | ||
2430 | stid->si_fileid, stid->si_generation); | ||
2431 | |||
2432 | st_id = stid->si_stateownerid; | ||
2433 | fp = find_file(ino); | ||
2434 | if (fp) { | ||
2435 | list_for_each_entry(dp, &fp->fi_del_perfile, dl_del_perfile) { | ||
2436 | if(dp->dl_stateid.si_stateownerid == st_id) { | ||
2437 | dprintk("NFSD: find_delegation dp %p\n",dp); | ||
2438 | return dp; | ||
2439 | } | ||
2440 | } | ||
2441 | } | ||
2442 | return NULL; | ||
2443 | } | ||
2444 | |||
2445 | /* | ||
2446 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | ||
2447 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | ||
2448 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | ||
2449 | * locking, this prevents us from being completely protocol-compliant. The | ||
2450 | * real solution to this problem is to start using unsigned file offsets in | ||
2451 | * the VFS, but this is a very deep change! | ||
2452 | */ | ||
2453 | static inline void | ||
2454 | nfs4_transform_lock_offset(struct file_lock *lock) | ||
2455 | { | ||
2456 | if (lock->fl_start < 0) | ||
2457 | lock->fl_start = OFFSET_MAX; | ||
2458 | if (lock->fl_end < 0) | ||
2459 | lock->fl_end = OFFSET_MAX; | ||
2460 | } | ||
2461 | |||
2462 | int | ||
2463 | nfs4_verify_lock_stateowner(struct nfs4_stateowner *sop, unsigned int hashval) | ||
2464 | { | ||
2465 | struct nfs4_stateowner *local = NULL; | ||
2466 | int status = 0; | ||
2467 | |||
2468 | if (hashval >= LOCK_HASH_SIZE) | ||
2469 | goto out; | ||
2470 | list_for_each_entry(local, &lock_ownerid_hashtbl[hashval], so_idhash) { | ||
2471 | if (local == sop) { | ||
2472 | status = 1; | ||
2473 | goto out; | ||
2474 | } | ||
2475 | } | ||
2476 | out: | ||
2477 | return status; | ||
2478 | } | ||
2479 | |||
2480 | |||
2481 | static inline void | ||
2482 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | ||
2483 | { | ||
2484 | struct nfs4_stateowner *sop = (struct nfs4_stateowner *) fl->fl_owner; | ||
2485 | unsigned int hval = lockownerid_hashval(sop->so_id); | ||
2486 | |||
2487 | deny->ld_sop = NULL; | ||
2488 | if (nfs4_verify_lock_stateowner(sop, hval)) { | ||
2489 | kref_get(&sop->so_ref); | ||
2490 | deny->ld_sop = sop; | ||
2491 | deny->ld_clientid = sop->so_client->cl_clientid; | ||
2492 | } | ||
2493 | deny->ld_start = fl->fl_start; | ||
2494 | deny->ld_length = ~(u64)0; | ||
2495 | if (fl->fl_end != ~(u64)0) | ||
2496 | deny->ld_length = fl->fl_end - fl->fl_start + 1; | ||
2497 | deny->ld_type = NFS4_READ_LT; | ||
2498 | if (fl->fl_type != F_RDLCK) | ||
2499 | deny->ld_type = NFS4_WRITE_LT; | ||
2500 | } | ||
2501 | |||
2502 | static struct nfs4_stateowner * | ||
2503 | find_lockstateowner(struct xdr_netobj *owner, clientid_t *clid) | ||
2504 | { | ||
2505 | struct nfs4_stateowner *local = NULL; | ||
2506 | int i; | ||
2507 | |||
2508 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | ||
2509 | list_for_each_entry(local, &lock_ownerid_hashtbl[i], so_idhash) { | ||
2510 | if (!cmp_owner_str(local, owner, clid)) | ||
2511 | continue; | ||
2512 | return local; | ||
2513 | } | ||
2514 | } | ||
2515 | return NULL; | ||
2516 | } | ||
2517 | |||
2518 | static struct nfs4_stateowner * | ||
2519 | find_lockstateowner_str(struct inode *inode, clientid_t *clid, | ||
2520 | struct xdr_netobj *owner) | ||
2521 | { | ||
2522 | unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); | ||
2523 | struct nfs4_stateowner *op; | ||
2524 | |||
2525 | list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { | ||
2526 | if (cmp_owner_str(op, owner, clid)) | ||
2527 | return op; | ||
2528 | } | ||
2529 | return NULL; | ||
2530 | } | ||
2531 | |||
2532 | /* | ||
2533 | * Alloc a lock owner structure. | ||
2534 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | ||
2535 | * occured. | ||
2536 | * | ||
2537 | * strhashval = lock_ownerstr_hashval | ||
2538 | * so_seqid = lock->lk_new_lock_seqid - 1: it gets bumped in encode | ||
2539 | */ | ||
2540 | |||
2541 | static struct nfs4_stateowner * | ||
2542 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { | ||
2543 | struct nfs4_stateowner *sop; | ||
2544 | struct nfs4_replay *rp; | ||
2545 | unsigned int idhashval; | ||
2546 | |||
2547 | if (!(sop = alloc_stateowner(&lock->lk_new_owner))) | ||
2548 | return NULL; | ||
2549 | idhashval = lockownerid_hashval(current_ownerid); | ||
2550 | INIT_LIST_HEAD(&sop->so_idhash); | ||
2551 | INIT_LIST_HEAD(&sop->so_strhash); | ||
2552 | INIT_LIST_HEAD(&sop->so_perclient); | ||
2553 | INIT_LIST_HEAD(&sop->so_perfilestate); | ||
2554 | INIT_LIST_HEAD(&sop->so_perlockowner); | ||
2555 | INIT_LIST_HEAD(&sop->so_close_lru); /* not used */ | ||
2556 | sop->so_time = 0; | ||
2557 | list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); | ||
2558 | list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); | ||
2559 | list_add(&sop->so_perlockowner, &open_stp->st_perlockowner); | ||
2560 | sop->so_is_open_owner = 0; | ||
2561 | sop->so_id = current_ownerid++; | ||
2562 | sop->so_client = clp; | ||
2563 | sop->so_seqid = lock->lk_new_lock_seqid - 1; | ||
2564 | sop->so_confirmed = 1; | ||
2565 | rp = &sop->so_replay; | ||
2566 | rp->rp_status = NFSERR_SERVERFAULT; | ||
2567 | rp->rp_buflen = 0; | ||
2568 | rp->rp_buf = rp->rp_ibuf; | ||
2569 | return sop; | ||
2570 | } | ||
2571 | |||
2572 | struct nfs4_stateid * | ||
2573 | alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) | ||
2574 | { | ||
2575 | struct nfs4_stateid *stp; | ||
2576 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); | ||
2577 | |||
2578 | if ((stp = kmalloc(sizeof(struct nfs4_stateid), | ||
2579 | GFP_KERNEL)) == NULL) | ||
2580 | goto out; | ||
2581 | INIT_LIST_HEAD(&stp->st_hash); | ||
2582 | INIT_LIST_HEAD(&stp->st_perfile); | ||
2583 | INIT_LIST_HEAD(&stp->st_perfilestate); | ||
2584 | INIT_LIST_HEAD(&stp->st_perlockowner); /* not used */ | ||
2585 | list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); | ||
2586 | list_add(&stp->st_perfile, &fp->fi_perfile); | ||
2587 | list_add_perfile++; | ||
2588 | list_add(&stp->st_perfilestate, &sop->so_perfilestate); | ||
2589 | stp->st_stateowner = sop; | ||
2590 | stp->st_file = fp; | ||
2591 | stp->st_stateid.si_boot = boot_time; | ||
2592 | stp->st_stateid.si_stateownerid = sop->so_id; | ||
2593 | stp->st_stateid.si_fileid = fp->fi_id; | ||
2594 | stp->st_stateid.si_generation = 0; | ||
2595 | stp->st_vfs_file = open_stp->st_vfs_file; /* FIXME refcount?? */ | ||
2596 | stp->st_access_bmap = open_stp->st_access_bmap; | ||
2597 | stp->st_deny_bmap = open_stp->st_deny_bmap; | ||
2598 | |||
2599 | out: | ||
2600 | return stp; | ||
2601 | } | ||
2602 | |||
2603 | int | ||
2604 | check_lock_length(u64 offset, u64 length) | ||
2605 | { | ||
2606 | return ((length == 0) || ((length != ~(u64)0) && | ||
2607 | LOFF_OVERFLOW(offset, length))); | ||
2608 | } | ||
2609 | |||
2610 | /* | ||
2611 | * LOCK operation | ||
2612 | */ | ||
2613 | int | ||
2614 | nfsd4_lock(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_lock *lock) | ||
2615 | { | ||
2616 | struct nfs4_stateowner *lock_sop = NULL, *open_sop = NULL; | ||
2617 | struct nfs4_stateid *lock_stp; | ||
2618 | struct file *filp; | ||
2619 | struct file_lock file_lock; | ||
2620 | struct file_lock *conflock; | ||
2621 | int status = 0; | ||
2622 | unsigned int strhashval; | ||
2623 | |||
2624 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | ||
2625 | (long long) lock->lk_offset, | ||
2626 | (long long) lock->lk_length); | ||
2627 | |||
2628 | if (nfs4_in_grace() && !lock->lk_reclaim) | ||
2629 | return nfserr_grace; | ||
2630 | if (!nfs4_in_grace() && lock->lk_reclaim) | ||
2631 | return nfserr_no_grace; | ||
2632 | |||
2633 | if (check_lock_length(lock->lk_offset, lock->lk_length)) | ||
2634 | return nfserr_inval; | ||
2635 | |||
2636 | nfs4_lock_state(); | ||
2637 | |||
2638 | if (lock->lk_is_new) { | ||
2639 | /* | ||
2640 | * Client indicates that this is a new lockowner. | ||
2641 | * Use open owner and open stateid to create lock owner and lock | ||
2642 | * stateid. | ||
2643 | */ | ||
2644 | struct nfs4_stateid *open_stp = NULL; | ||
2645 | struct nfs4_file *fp; | ||
2646 | |||
2647 | status = nfserr_stale_clientid; | ||
2648 | if (STALE_CLIENTID(&lock->lk_new_clientid)) { | ||
2649 | printk("NFSD: nfsd4_lock: clientid is stale!\n"); | ||
2650 | goto out; | ||
2651 | } | ||
2652 | |||
2653 | /* is the new lock seqid presented by the client zero? */ | ||
2654 | status = nfserr_bad_seqid; | ||
2655 | if (lock->v.new.lock_seqid != 0) | ||
2656 | goto out; | ||
2657 | |||
2658 | /* validate and update open stateid and open seqid */ | ||
2659 | status = nfs4_preprocess_seqid_op(current_fh, | ||
2660 | lock->lk_new_open_seqid, | ||
2661 | &lock->lk_new_open_stateid, | ||
2662 | CHECK_FH | OPEN_STATE, | ||
2663 | &open_sop, &open_stp, | ||
2664 | &lock->v.new.clientid); | ||
2665 | if (status) { | ||
2666 | if (lock->lk_reclaim) | ||
2667 | status = nfserr_reclaim_bad; | ||
2668 | goto out; | ||
2669 | } | ||
2670 | /* create lockowner and lock stateid */ | ||
2671 | fp = open_stp->st_file; | ||
2672 | strhashval = lock_ownerstr_hashval(fp->fi_inode, | ||
2673 | open_sop->so_client->cl_clientid.cl_id, | ||
2674 | &lock->v.new.owner); | ||
2675 | /* | ||
2676 | * If we already have this lock owner, the client is in | ||
2677 | * error (or our bookeeping is wrong!) | ||
2678 | * for asking for a 'new lock'. | ||
2679 | */ | ||
2680 | status = nfserr_bad_stateid; | ||
2681 | lock_sop = find_lockstateowner(&lock->v.new.owner, | ||
2682 | &lock->v.new.clientid); | ||
2683 | if (lock_sop) | ||
2684 | goto out; | ||
2685 | status = nfserr_resource; | ||
2686 | if (!(lock->lk_stateowner = alloc_init_lock_stateowner(strhashval, open_sop->so_client, open_stp, lock))) | ||
2687 | goto out; | ||
2688 | if ((lock_stp = alloc_init_lock_stateid(lock->lk_stateowner, | ||
2689 | fp, open_stp)) == NULL) { | ||
2690 | release_stateowner(lock->lk_stateowner); | ||
2691 | lock->lk_stateowner = NULL; | ||
2692 | goto out; | ||
2693 | } | ||
2694 | /* bump the open seqid used to create the lock */ | ||
2695 | open_sop->so_seqid++; | ||
2696 | } else { | ||
2697 | /* lock (lock owner + lock stateid) already exists */ | ||
2698 | status = nfs4_preprocess_seqid_op(current_fh, | ||
2699 | lock->lk_old_lock_seqid, | ||
2700 | &lock->lk_old_lock_stateid, | ||
2701 | CHECK_FH | LOCK_STATE, | ||
2702 | &lock->lk_stateowner, &lock_stp, NULL); | ||
2703 | if (status) | ||
2704 | goto out; | ||
2705 | } | ||
2706 | /* lock->lk_stateowner and lock_stp have been created or found */ | ||
2707 | filp = lock_stp->st_vfs_file; | ||
2708 | |||
2709 | if ((status = fh_verify(rqstp, current_fh, S_IFREG, MAY_LOCK))) { | ||
2710 | printk("NFSD: nfsd4_lock: permission denied!\n"); | ||
2711 | goto out; | ||
2712 | } | ||
2713 | |||
2714 | locks_init_lock(&file_lock); | ||
2715 | switch (lock->lk_type) { | ||
2716 | case NFS4_READ_LT: | ||
2717 | case NFS4_READW_LT: | ||
2718 | file_lock.fl_type = F_RDLCK; | ||
2719 | break; | ||
2720 | case NFS4_WRITE_LT: | ||
2721 | case NFS4_WRITEW_LT: | ||
2722 | file_lock.fl_type = F_WRLCK; | ||
2723 | break; | ||
2724 | default: | ||
2725 | status = nfserr_inval; | ||
2726 | goto out; | ||
2727 | } | ||
2728 | file_lock.fl_owner = (fl_owner_t) lock->lk_stateowner; | ||
2729 | file_lock.fl_pid = current->tgid; | ||
2730 | file_lock.fl_file = filp; | ||
2731 | file_lock.fl_flags = FL_POSIX; | ||
2732 | |||
2733 | file_lock.fl_start = lock->lk_offset; | ||
2734 | if ((lock->lk_length == ~(u64)0) || | ||
2735 | LOFF_OVERFLOW(lock->lk_offset, lock->lk_length)) | ||
2736 | file_lock.fl_end = ~(u64)0; | ||
2737 | else | ||
2738 | file_lock.fl_end = lock->lk_offset + lock->lk_length - 1; | ||
2739 | nfs4_transform_lock_offset(&file_lock); | ||
2740 | |||
2741 | /* | ||
2742 | * Try to lock the file in the VFS. | ||
2743 | * Note: locks.c uses the BKL to protect the inode's lock list. | ||
2744 | */ | ||
2745 | |||
2746 | status = posix_lock_file(filp, &file_lock); | ||
2747 | if (file_lock.fl_ops && file_lock.fl_ops->fl_release_private) | ||
2748 | file_lock.fl_ops->fl_release_private(&file_lock); | ||
2749 | dprintk("NFSD: nfsd4_lock: posix_lock_file status %d\n",status); | ||
2750 | switch (-status) { | ||
2751 | case 0: /* success! */ | ||
2752 | update_stateid(&lock_stp->st_stateid); | ||
2753 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, | ||
2754 | sizeof(stateid_t)); | ||
2755 | goto out; | ||
2756 | case (EAGAIN): | ||
2757 | goto conflicting_lock; | ||
2758 | case (EDEADLK): | ||
2759 | status = nfserr_deadlock; | ||
2760 | default: | ||
2761 | dprintk("NFSD: nfsd4_lock: posix_lock_file() failed! status %d\n",status); | ||
2762 | goto out_destroy_new_stateid; | ||
2763 | } | ||
2764 | |||
2765 | conflicting_lock: | ||
2766 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | ||
2767 | status = nfserr_denied; | ||
2768 | /* XXX There is a race here. Future patch needed to provide | ||
2769 | * an atomic posix_lock_and_test_file | ||
2770 | */ | ||
2771 | if (!(conflock = posix_test_lock(filp, &file_lock))) { | ||
2772 | status = nfserr_serverfault; | ||
2773 | goto out; | ||
2774 | } | ||
2775 | nfs4_set_lock_denied(conflock, &lock->lk_denied); | ||
2776 | |||
2777 | out_destroy_new_stateid: | ||
2778 | if (lock->lk_is_new) { | ||
2779 | dprintk("NFSD: nfsd4_lock: destroy new stateid!\n"); | ||
2780 | /* | ||
2781 | * An error encountered after instantiation of the new | ||
2782 | * stateid has forced us to destroy it. | ||
2783 | */ | ||
2784 | if (!seqid_mutating_err(status)) | ||
2785 | open_sop->so_seqid--; | ||
2786 | |||
2787 | release_state_owner(lock_stp, LOCK_STATE); | ||
2788 | } | ||
2789 | out: | ||
2790 | if (lock->lk_stateowner) | ||
2791 | nfs4_get_stateowner(lock->lk_stateowner); | ||
2792 | nfs4_unlock_state(); | ||
2793 | return status; | ||
2794 | } | ||
2795 | |||
2796 | /* | ||
2797 | * LOCKT operation | ||
2798 | */ | ||
2799 | int | ||
2800 | nfsd4_lockt(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_lockt *lockt) | ||
2801 | { | ||
2802 | struct inode *inode; | ||
2803 | struct file file; | ||
2804 | struct file_lock file_lock; | ||
2805 | struct file_lock *conflicting_lock; | ||
2806 | int status; | ||
2807 | |||
2808 | if (nfs4_in_grace()) | ||
2809 | return nfserr_grace; | ||
2810 | |||
2811 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | ||
2812 | return nfserr_inval; | ||
2813 | |||
2814 | lockt->lt_stateowner = NULL; | ||
2815 | nfs4_lock_state(); | ||
2816 | |||
2817 | status = nfserr_stale_clientid; | ||
2818 | if (STALE_CLIENTID(&lockt->lt_clientid)) { | ||
2819 | printk("NFSD: nfsd4_lockt: clientid is stale!\n"); | ||
2820 | goto out; | ||
2821 | } | ||
2822 | |||
2823 | if ((status = fh_verify(rqstp, current_fh, S_IFREG, 0))) { | ||
2824 | printk("NFSD: nfsd4_lockt: fh_verify() failed!\n"); | ||
2825 | if (status == nfserr_symlink) | ||
2826 | status = nfserr_inval; | ||
2827 | goto out; | ||
2828 | } | ||
2829 | |||
2830 | inode = current_fh->fh_dentry->d_inode; | ||
2831 | locks_init_lock(&file_lock); | ||
2832 | switch (lockt->lt_type) { | ||
2833 | case NFS4_READ_LT: | ||
2834 | case NFS4_READW_LT: | ||
2835 | file_lock.fl_type = F_RDLCK; | ||
2836 | break; | ||
2837 | case NFS4_WRITE_LT: | ||
2838 | case NFS4_WRITEW_LT: | ||
2839 | file_lock.fl_type = F_WRLCK; | ||
2840 | break; | ||
2841 | default: | ||
2842 | printk("NFSD: nfs4_lockt: bad lock type!\n"); | ||
2843 | status = nfserr_inval; | ||
2844 | goto out; | ||
2845 | } | ||
2846 | |||
2847 | lockt->lt_stateowner = find_lockstateowner_str(inode, | ||
2848 | &lockt->lt_clientid, &lockt->lt_owner); | ||
2849 | if (lockt->lt_stateowner) | ||
2850 | file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; | ||
2851 | file_lock.fl_pid = current->tgid; | ||
2852 | file_lock.fl_flags = FL_POSIX; | ||
2853 | |||
2854 | file_lock.fl_start = lockt->lt_offset; | ||
2855 | if ((lockt->lt_length == ~(u64)0) || LOFF_OVERFLOW(lockt->lt_offset, lockt->lt_length)) | ||
2856 | file_lock.fl_end = ~(u64)0; | ||
2857 | else | ||
2858 | file_lock.fl_end = lockt->lt_offset + lockt->lt_length - 1; | ||
2859 | |||
2860 | nfs4_transform_lock_offset(&file_lock); | ||
2861 | |||
2862 | /* posix_test_lock uses the struct file _only_ to resolve the inode. | ||
2863 | * since LOCKT doesn't require an OPEN, and therefore a struct | ||
2864 | * file may not exist, pass posix_test_lock a struct file with | ||
2865 | * only the dentry:inode set. | ||
2866 | */ | ||
2867 | memset(&file, 0, sizeof (struct file)); | ||
2868 | file.f_dentry = current_fh->fh_dentry; | ||
2869 | |||
2870 | status = nfs_ok; | ||
2871 | conflicting_lock = posix_test_lock(&file, &file_lock); | ||
2872 | if (conflicting_lock) { | ||
2873 | status = nfserr_denied; | ||
2874 | nfs4_set_lock_denied(conflicting_lock, &lockt->lt_denied); | ||
2875 | } | ||
2876 | out: | ||
2877 | nfs4_unlock_state(); | ||
2878 | return status; | ||
2879 | } | ||
2880 | |||
2881 | int | ||
2882 | nfsd4_locku(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_locku *locku) | ||
2883 | { | ||
2884 | struct nfs4_stateid *stp; | ||
2885 | struct file *filp = NULL; | ||
2886 | struct file_lock file_lock; | ||
2887 | int status; | ||
2888 | |||
2889 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", | ||
2890 | (long long) locku->lu_offset, | ||
2891 | (long long) locku->lu_length); | ||
2892 | |||
2893 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | ||
2894 | return nfserr_inval; | ||
2895 | |||
2896 | nfs4_lock_state(); | ||
2897 | |||
2898 | if ((status = nfs4_preprocess_seqid_op(current_fh, | ||
2899 | locku->lu_seqid, | ||
2900 | &locku->lu_stateid, | ||
2901 | CHECK_FH | LOCK_STATE, | ||
2902 | &locku->lu_stateowner, &stp, NULL))) | ||
2903 | goto out; | ||
2904 | |||
2905 | filp = stp->st_vfs_file; | ||
2906 | BUG_ON(!filp); | ||
2907 | locks_init_lock(&file_lock); | ||
2908 | file_lock.fl_type = F_UNLCK; | ||
2909 | file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; | ||
2910 | file_lock.fl_pid = current->tgid; | ||
2911 | file_lock.fl_file = filp; | ||
2912 | file_lock.fl_flags = FL_POSIX; | ||
2913 | file_lock.fl_start = locku->lu_offset; | ||
2914 | |||
2915 | if ((locku->lu_length == ~(u64)0) || LOFF_OVERFLOW(locku->lu_offset, locku->lu_length)) | ||
2916 | file_lock.fl_end = ~(u64)0; | ||
2917 | else | ||
2918 | file_lock.fl_end = locku->lu_offset + locku->lu_length - 1; | ||
2919 | nfs4_transform_lock_offset(&file_lock); | ||
2920 | |||
2921 | /* | ||
2922 | * Try to unlock the file in the VFS. | ||
2923 | */ | ||
2924 | status = posix_lock_file(filp, &file_lock); | ||
2925 | if (file_lock.fl_ops && file_lock.fl_ops->fl_release_private) | ||
2926 | file_lock.fl_ops->fl_release_private(&file_lock); | ||
2927 | if (status) { | ||
2928 | printk("NFSD: nfs4_locku: posix_lock_file failed!\n"); | ||
2929 | goto out_nfserr; | ||
2930 | } | ||
2931 | /* | ||
2932 | * OK, unlock succeeded; the only thing left to do is update the stateid. | ||
2933 | */ | ||
2934 | update_stateid(&stp->st_stateid); | ||
2935 | memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); | ||
2936 | |||
2937 | out: | ||
2938 | if (locku->lu_stateowner) | ||
2939 | nfs4_get_stateowner(locku->lu_stateowner); | ||
2940 | nfs4_unlock_state(); | ||
2941 | return status; | ||
2942 | |||
2943 | out_nfserr: | ||
2944 | status = nfserrno(status); | ||
2945 | goto out; | ||
2946 | } | ||
2947 | |||
2948 | /* | ||
2949 | * returns | ||
2950 | * 1: locks held by lockowner | ||
2951 | * 0: no locks held by lockowner | ||
2952 | */ | ||
2953 | static int | ||
2954 | check_for_locks(struct file *filp, struct nfs4_stateowner *lowner) | ||
2955 | { | ||
2956 | struct file_lock **flpp; | ||
2957 | struct inode *inode = filp->f_dentry->d_inode; | ||
2958 | int status = 0; | ||
2959 | |||
2960 | lock_kernel(); | ||
2961 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { | ||
2962 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) | ||
2963 | status = 1; | ||
2964 | goto out; | ||
2965 | } | ||
2966 | out: | ||
2967 | unlock_kernel(); | ||
2968 | return status; | ||
2969 | } | ||
2970 | |||
2971 | int | ||
2972 | nfsd4_release_lockowner(struct svc_rqst *rqstp, struct nfsd4_release_lockowner *rlockowner) | ||
2973 | { | ||
2974 | clientid_t *clid = &rlockowner->rl_clientid; | ||
2975 | struct nfs4_stateowner *local = NULL; | ||
2976 | struct xdr_netobj *owner = &rlockowner->rl_owner; | ||
2977 | int status; | ||
2978 | |||
2979 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | ||
2980 | clid->cl_boot, clid->cl_id); | ||
2981 | |||
2982 | /* XXX check for lease expiration */ | ||
2983 | |||
2984 | status = nfserr_stale_clientid; | ||
2985 | if (STALE_CLIENTID(clid)) { | ||
2986 | printk("NFSD: nfsd4_release_lockowner: clientid is stale!\n"); | ||
2987 | return status; | ||
2988 | } | ||
2989 | |||
2990 | nfs4_lock_state(); | ||
2991 | |||
2992 | status = nfs_ok; | ||
2993 | local = find_lockstateowner(owner, clid); | ||
2994 | if (local) { | ||
2995 | struct nfs4_stateid *stp; | ||
2996 | |||
2997 | /* check for any locks held by any stateid | ||
2998 | * associated with the (lock) stateowner */ | ||
2999 | status = nfserr_locks_held; | ||
3000 | list_for_each_entry(stp, &local->so_perfilestate, | ||
3001 | st_perfilestate) { | ||
3002 | if (check_for_locks(stp->st_vfs_file, local)) | ||
3003 | goto out; | ||
3004 | } | ||
3005 | /* no locks held by (lock) stateowner */ | ||
3006 | status = nfs_ok; | ||
3007 | release_stateowner(local); | ||
3008 | } | ||
3009 | out: | ||
3010 | nfs4_unlock_state(); | ||
3011 | return status; | ||
3012 | } | ||
3013 | |||
3014 | static inline struct nfs4_client_reclaim * | ||
3015 | alloc_reclaim(int namelen) | ||
3016 | { | ||
3017 | struct nfs4_client_reclaim *crp = NULL; | ||
3018 | |||
3019 | crp = kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); | ||
3020 | if (!crp) | ||
3021 | return NULL; | ||
3022 | crp->cr_name.data = kmalloc(namelen, GFP_KERNEL); | ||
3023 | if (!crp->cr_name.data) { | ||
3024 | kfree(crp); | ||
3025 | return NULL; | ||
3026 | } | ||
3027 | return crp; | ||
3028 | } | ||
3029 | |||
3030 | /* | ||
3031 | * failure => all reset bets are off, nfserr_no_grace... | ||
3032 | */ | ||
3033 | static int | ||
3034 | nfs4_client_to_reclaim(char *name, int namlen) | ||
3035 | { | ||
3036 | unsigned int strhashval; | ||
3037 | struct nfs4_client_reclaim *crp = NULL; | ||
3038 | |||
3039 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", namlen, name); | ||
3040 | crp = alloc_reclaim(namlen); | ||
3041 | if (!crp) | ||
3042 | return 0; | ||
3043 | strhashval = clientstr_hashval(name, namlen); | ||
3044 | INIT_LIST_HEAD(&crp->cr_strhash); | ||
3045 | list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); | ||
3046 | memcpy(crp->cr_name.data, name, namlen); | ||
3047 | crp->cr_name.len = namlen; | ||
3048 | reclaim_str_hashtbl_size++; | ||
3049 | return 1; | ||
3050 | } | ||
3051 | |||
3052 | static void | ||
3053 | nfs4_release_reclaim(void) | ||
3054 | { | ||
3055 | struct nfs4_client_reclaim *crp = NULL; | ||
3056 | int i; | ||
3057 | |||
3058 | BUG_ON(!nfs4_reclaim_init); | ||
3059 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { | ||
3060 | while (!list_empty(&reclaim_str_hashtbl[i])) { | ||
3061 | crp = list_entry(reclaim_str_hashtbl[i].next, | ||
3062 | struct nfs4_client_reclaim, cr_strhash); | ||
3063 | list_del(&crp->cr_strhash); | ||
3064 | kfree(crp->cr_name.data); | ||
3065 | kfree(crp); | ||
3066 | reclaim_str_hashtbl_size--; | ||
3067 | } | ||
3068 | } | ||
3069 | BUG_ON(reclaim_str_hashtbl_size); | ||
3070 | } | ||
3071 | |||
3072 | /* | ||
3073 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | ||
3074 | struct nfs4_client_reclaim * | ||
3075 | nfs4_find_reclaim_client(clientid_t *clid) | ||
3076 | { | ||
3077 | unsigned int strhashval; | ||
3078 | struct nfs4_client *clp; | ||
3079 | struct nfs4_client_reclaim *crp = NULL; | ||
3080 | |||
3081 | |||
3082 | /* find clientid in conf_id_hashtbl */ | ||
3083 | clp = find_confirmed_client(clid); | ||
3084 | if (clp == NULL) | ||
3085 | return NULL; | ||
3086 | |||
3087 | dprintk("NFSD: nfs4_find_reclaim_client for %.*s\n", | ||
3088 | clp->cl_name.len, clp->cl_name.data); | ||
3089 | |||
3090 | /* find clp->cl_name in reclaim_str_hashtbl */ | ||
3091 | strhashval = clientstr_hashval(clp->cl_name.data, clp->cl_name.len); | ||
3092 | list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { | ||
3093 | if (cmp_name(&crp->cr_name, &clp->cl_name)) { | ||
3094 | return crp; | ||
3095 | } | ||
3096 | } | ||
3097 | return NULL; | ||
3098 | } | ||
3099 | |||
3100 | /* | ||
3101 | * Called from OPEN. Look for clientid in reclaim list. | ||
3102 | */ | ||
3103 | int | ||
3104 | nfs4_check_open_reclaim(clientid_t *clid) | ||
3105 | { | ||
3106 | struct nfs4_client_reclaim *crp; | ||
3107 | |||
3108 | if ((crp = nfs4_find_reclaim_client(clid)) == NULL) | ||
3109 | return nfserr_reclaim_bad; | ||
3110 | return nfs_ok; | ||
3111 | } | ||
3112 | |||
3113 | |||
3114 | /* | ||
3115 | * Start and stop routines | ||
3116 | */ | ||
3117 | |||
3118 | static void | ||
3119 | __nfs4_state_init(void) | ||
3120 | { | ||
3121 | int i; | ||
3122 | time_t grace_time; | ||
3123 | |||
3124 | if (!nfs4_reclaim_init) { | ||
3125 | for (i = 0; i < CLIENT_HASH_SIZE; i++) | ||
3126 | INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); | ||
3127 | reclaim_str_hashtbl_size = 0; | ||
3128 | nfs4_reclaim_init = 1; | ||
3129 | } | ||
3130 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { | ||
3131 | INIT_LIST_HEAD(&conf_id_hashtbl[i]); | ||
3132 | INIT_LIST_HEAD(&conf_str_hashtbl[i]); | ||
3133 | INIT_LIST_HEAD(&unconf_str_hashtbl[i]); | ||
3134 | INIT_LIST_HEAD(&unconf_id_hashtbl[i]); | ||
3135 | } | ||
3136 | for (i = 0; i < FILE_HASH_SIZE; i++) { | ||
3137 | INIT_LIST_HEAD(&file_hashtbl[i]); | ||
3138 | } | ||
3139 | for (i = 0; i < OWNER_HASH_SIZE; i++) { | ||
3140 | INIT_LIST_HEAD(&ownerstr_hashtbl[i]); | ||
3141 | INIT_LIST_HEAD(&ownerid_hashtbl[i]); | ||
3142 | } | ||
3143 | for (i = 0; i < STATEID_HASH_SIZE; i++) { | ||
3144 | INIT_LIST_HEAD(&stateid_hashtbl[i]); | ||
3145 | INIT_LIST_HEAD(&lockstateid_hashtbl[i]); | ||
3146 | } | ||
3147 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | ||
3148 | INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); | ||
3149 | INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); | ||
3150 | } | ||
3151 | memset(&zerostateid, 0, sizeof(stateid_t)); | ||
3152 | memset(&onestateid, ~0, sizeof(stateid_t)); | ||
3153 | |||
3154 | INIT_LIST_HEAD(&close_lru); | ||
3155 | INIT_LIST_HEAD(&client_lru); | ||
3156 | INIT_LIST_HEAD(&del_recall_lru); | ||
3157 | spin_lock_init(&recall_lock); | ||
3158 | boot_time = get_seconds(); | ||
3159 | grace_time = max(old_lease_time, lease_time); | ||
3160 | if (reclaim_str_hashtbl_size == 0) | ||
3161 | grace_time = 0; | ||
3162 | if (grace_time) | ||
3163 | printk("NFSD: starting %ld-second grace period\n", grace_time); | ||
3164 | grace_end = boot_time + grace_time; | ||
3165 | INIT_WORK(&laundromat_work,laundromat_main, NULL); | ||
3166 | schedule_delayed_work(&laundromat_work, NFSD_LEASE_TIME*HZ); | ||
3167 | } | ||
3168 | |||
3169 | int | ||
3170 | nfs4_state_init(void) | ||
3171 | { | ||
3172 | int status; | ||
3173 | |||
3174 | if (nfs4_init) | ||
3175 | return 0; | ||
3176 | status = nfsd4_init_slabs(); | ||
3177 | if (status) | ||
3178 | return status; | ||
3179 | __nfs4_state_init(); | ||
3180 | nfs4_init = 1; | ||
3181 | return 0; | ||
3182 | } | ||
3183 | |||
3184 | int | ||
3185 | nfs4_in_grace(void) | ||
3186 | { | ||
3187 | return get_seconds() < grace_end; | ||
3188 | } | ||
3189 | |||
3190 | void | ||
3191 | set_no_grace(void) | ||
3192 | { | ||
3193 | printk("NFSD: ERROR in reboot recovery. State reclaims will fail.\n"); | ||
3194 | grace_end = get_seconds(); | ||
3195 | } | ||
3196 | |||
3197 | time_t | ||
3198 | nfs4_lease_time(void) | ||
3199 | { | ||
3200 | return lease_time; | ||
3201 | } | ||
3202 | |||
3203 | static void | ||
3204 | __nfs4_state_shutdown(void) | ||
3205 | { | ||
3206 | int i; | ||
3207 | struct nfs4_client *clp = NULL; | ||
3208 | struct nfs4_delegation *dp = NULL; | ||
3209 | struct nfs4_stateowner *sop = NULL; | ||
3210 | struct list_head *pos, *next, reaplist; | ||
3211 | |||
3212 | list_for_each_safe(pos, next, &close_lru) { | ||
3213 | sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); | ||
3214 | list_del(&sop->so_close_lru); | ||
3215 | nfs4_put_stateowner(sop); | ||
3216 | } | ||
3217 | |||
3218 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { | ||
3219 | while (!list_empty(&conf_id_hashtbl[i])) { | ||
3220 | clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | ||
3221 | expire_client(clp); | ||
3222 | } | ||
3223 | while (!list_empty(&unconf_str_hashtbl[i])) { | ||
3224 | clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); | ||
3225 | expire_client(clp); | ||
3226 | } | ||
3227 | } | ||
3228 | INIT_LIST_HEAD(&reaplist); | ||
3229 | spin_lock(&recall_lock); | ||
3230 | list_for_each_safe(pos, next, &del_recall_lru) { | ||
3231 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | ||
3232 | list_move(&dp->dl_recall_lru, &reaplist); | ||
3233 | } | ||
3234 | spin_unlock(&recall_lock); | ||
3235 | list_for_each_safe(pos, next, &reaplist) { | ||
3236 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | ||
3237 | list_del_init(&dp->dl_recall_lru); | ||
3238 | unhash_delegation(dp); | ||
3239 | } | ||
3240 | |||
3241 | release_all_files(); | ||
3242 | cancel_delayed_work(&laundromat_work); | ||
3243 | flush_scheduled_work(); | ||
3244 | nfs4_init = 0; | ||
3245 | dprintk("NFSD: list_add_perfile %d list_del_perfile %d\n", | ||
3246 | list_add_perfile, list_del_perfile); | ||
3247 | dprintk("NFSD: add_perclient %d del_perclient %d\n", | ||
3248 | add_perclient, del_perclient); | ||
3249 | dprintk("NFSD: alloc_file %d free_file %d\n", | ||
3250 | alloc_file, free_file); | ||
3251 | dprintk("NFSD: vfsopen %d vfsclose %d\n", | ||
3252 | vfsopen, vfsclose); | ||
3253 | dprintk("NFSD: alloc_delegation %d free_delegation %d\n", | ||
3254 | alloc_delegation, free_delegation); | ||
3255 | |||
3256 | } | ||
3257 | |||
3258 | void | ||
3259 | nfs4_state_shutdown(void) | ||
3260 | { | ||
3261 | nfs4_lock_state(); | ||
3262 | nfs4_release_reclaim(); | ||
3263 | __nfs4_state_shutdown(); | ||
3264 | nfsd4_free_slabs(); | ||
3265 | nfs4_unlock_state(); | ||
3266 | } | ||
3267 | |||
3268 | /* | ||
3269 | * Called when leasetime is changed. | ||
3270 | * | ||
3271 | * if nfsd is not started, simply set the global lease. | ||
3272 | * | ||
3273 | * if nfsd(s) are running, lease change requires nfsv4 state to be reset. | ||
3274 | * e.g: boot_time is reset, existing nfs4_client structs are | ||
3275 | * used to fill reclaim_str_hashtbl, then all state (except for the | ||
3276 | * reclaim_str_hashtbl) is re-initialized. | ||
3277 | * | ||
3278 | * if the old lease time is greater than the new lease time, the grace | ||
3279 | * period needs to be set to the old lease time to allow clients to reclaim | ||
3280 | * their state. XXX - we may want to set the grace period == lease time | ||
3281 | * after an initial grace period == old lease time | ||
3282 | * | ||
3283 | * if an error occurs in this process, the new lease is set, but the server | ||
3284 | * will not honor OPEN or LOCK reclaims, and will return nfserr_no_grace | ||
3285 | * which means OPEN/LOCK/READ/WRITE will fail during grace period. | ||
3286 | * | ||
3287 | * clients will attempt to reset all state with SETCLIENTID/CONFIRM, and | ||
3288 | * OPEN and LOCK reclaims. | ||
3289 | */ | ||
3290 | void | ||
3291 | nfs4_reset_lease(time_t leasetime) | ||
3292 | { | ||
3293 | struct nfs4_client *clp; | ||
3294 | int i; | ||
3295 | |||
3296 | printk("NFSD: New leasetime %ld\n",leasetime); | ||
3297 | if (!nfs4_init) | ||
3298 | return; | ||
3299 | nfs4_lock_state(); | ||
3300 | old_lease_time = lease_time; | ||
3301 | lease_time = leasetime; | ||
3302 | |||
3303 | nfs4_release_reclaim(); | ||
3304 | |||
3305 | /* populate reclaim_str_hashtbl with current confirmed nfs4_clientid */ | ||
3306 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { | ||
3307 | list_for_each_entry(clp, &conf_id_hashtbl[i], cl_idhash) { | ||
3308 | if (!nfs4_client_to_reclaim(clp->cl_name.data, | ||
3309 | clp->cl_name.len)) { | ||
3310 | nfs4_release_reclaim(); | ||
3311 | goto init_state; | ||
3312 | } | ||
3313 | } | ||
3314 | } | ||
3315 | init_state: | ||
3316 | __nfs4_state_shutdown(); | ||
3317 | __nfs4_state_init(); | ||
3318 | nfs4_unlock_state(); | ||
3319 | } | ||
3320 | |||