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nfsd warning fix
[linux-2.6-block.git] / fs / nfsd / nfs4state.c
CommitLineData
1da177e4
LT		 1/*
2* linux/fs/nfsd/nfs4state.c
3*
4* Copyright (c) 2001 The Regents of the University of Michigan.
5* All rights reserved.
6*
7* Kendrick Smith <kmsmith@umich.edu>
8* Andy Adamson <kandros@umich.edu>
9*
10* Redistribution and use in source and binary forms, with or without
11* modification, are permitted provided that the following conditions
12* are met:
13*
14* 1. Redistributions of source code must retain the above copyright
15* notice, this list of conditions and the following disclaimer.
16* 2. Redistributions in binary form must reproduce the above copyright
17* notice, this list of conditions and the following disclaimer in the
18* documentation and/or other materials provided with the distribution.
19* 3. Neither the name of the University nor the names of its
20* contributors may be used to endorse or promote products derived
21* from this software without specific prior written permission.
22*
23* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34*
35*/
36
37#include <linux/param.h>
38#include <linux/major.h>
39#include <linux/slab.h>
40
41#include <linux/sunrpc/svc.h>
42#include <linux/nfsd/nfsd.h>
43#include <linux/nfsd/cache.h>
44#include <linux/mount.h>
45#include <linux/workqueue.h>
46#include <linux/smp_lock.h>
47#include <linux/kthread.h>
48#include <linux/nfs4.h>
49#include <linux/nfsd/state.h>
50#include <linux/nfsd/xdr4.h>
0964a3d3 51#include <linux/namei.h>
353ab6e9 52#include <linux/mutex.h>
fd85b817 53#include <linux/lockd/bind.h>
1da177e4
LT		 54
55#define NFSDDBG_FACILITY NFSDDBG_PROC
56
57/* Globals */
58static time_t lease_time = 90; /* default lease time */
d99a05ad 59static time_t user_lease_time = 90;
fd39ca9a 60static time_t boot_time;
a76b4319 61static int in_grace = 1;
1da177e4
LT		 62static u32 current_clientid = 1;
63static u32 current_ownerid = 1;
64static u32 current_fileid = 1;
65static u32 current_delegid = 1;
66static u32 nfs4_init;
fd39ca9a
N		 67static stateid_t zerostateid; /* bits all 0 */
68static stateid_t onestateid; /* bits all 1 */
69
70#define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t)))
71#define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t)))
1da177e4 72
1da177e4 73/* forward declarations */
fd39ca9a 74static struct nfs4_stateid * find_stateid(stateid_t *stid, int flags);
1da177e4
LT		 75static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid);
76static void release_stateid_lockowners(struct nfs4_stateid *open_stp);
0964a3d3
N		 77static char user_recovery_dirname[PATH_MAX] = "/var/lib/nfs/v4recovery";
78static void nfs4_set_recdir(char *recdir);
1da177e4
LT		 79
80/* Locking:
81 *
353ab6e9 82 * client_mutex:
1da177e4
LT		 83 * protects clientid_hashtbl[], clientstr_hashtbl[],
84 * unconfstr_hashtbl[], uncofid_hashtbl[].
85 */
353ab6e9 86static DEFINE_MUTEX(client_mutex);
1da177e4 87
e18b890b
CL		 88static struct kmem_cache *stateowner_slab = NULL;
89static struct kmem_cache *file_slab = NULL;
90static struct kmem_cache *stateid_slab = NULL;
91static struct kmem_cache *deleg_slab = NULL;
e60d4398 92
1da177e4
LT		 93void
94nfs4_lock_state(void)
95{
353ab6e9 96 mutex_lock(&client_mutex);
1da177e4
LT		 97}
98
99void
100nfs4_unlock_state(void)
101{
353ab6e9 102 mutex_unlock(&client_mutex);
1da177e4
LT		 103}
104
105static inline u32
106opaque_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 */
119static void release_stateowner(struct nfs4_stateowner *sop);
120static void release_stateid(struct nfs4_stateid *stp, int flags);
1da177e4
LT		 121
122/*
123 * Delegation state
124 */
125
126/* recall_lock protects the del_recall_lru */
34af946a 127static DEFINE_SPINLOCK(recall_lock);
1da177e4
LT		 128static struct list_head del_recall_lru;
129
13cd2184
N		 130static void
131free_nfs4_file(struct kref *kref)
132{
133 struct nfs4_file *fp = container_of(kref, struct nfs4_file, fi_ref);
134 list_del(&fp->fi_hash);
135 iput(fp->fi_inode);
136 kmem_cache_free(file_slab, fp);
137}
138
139static inline void
140put_nfs4_file(struct nfs4_file *fi)
141{
142 kref_put(&fi->fi_ref, free_nfs4_file);
143}
144
145static inline void
146get_nfs4_file(struct nfs4_file *fi)
147{
148 kref_get(&fi->fi_ref);
149}
150
ef0f3390
N		 151static int num_delegations;
152
153/*
154 * Open owner state (share locks)
155 */
156
157/* hash tables for nfs4_stateowner */
158#define OWNER_HASH_BITS 8
159#define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
160#define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
161
162#define ownerid_hashval(id) \
163 ((id) & OWNER_HASH_MASK)
164#define ownerstr_hashval(clientid, ownername) \
165 (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK)
166
167static struct list_head ownerid_hashtbl[OWNER_HASH_SIZE];
168static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE];
169
170/* hash table for nfs4_file */
171#define FILE_HASH_BITS 8
172#define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
173#define FILE_HASH_MASK (FILE_HASH_SIZE - 1)
174/* hash table for (open)nfs4_stateid */
175#define STATEID_HASH_BITS 10
176#define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS)
177#define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1)
178
179#define file_hashval(x) \
180 hash_ptr(x, FILE_HASH_BITS)
181#define stateid_hashval(owner_id, file_id) \
182 (((owner_id) + (file_id)) & STATEID_HASH_MASK)
183
184static struct list_head file_hashtbl[FILE_HASH_SIZE];
185static struct list_head stateid_hashtbl[STATEID_HASH_SIZE];
186
1da177e4
LT		 187static struct nfs4_delegation *
188alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type)
189{
190 struct nfs4_delegation *dp;
191 struct nfs4_file *fp = stp->st_file;
192 struct nfs4_callback *cb = &stp->st_stateowner->so_client->cl_callback;
193
194 dprintk("NFSD alloc_init_deleg\n");
ef0f3390
N		 195 if (num_delegations > STATEID_HASH_SIZE * 4)
196 return NULL;
5b2d21c1
N		 197 dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL);
198 if (dp == NULL)
1da177e4 199 return dp;
ef0f3390 200 num_delegations++;
ea1da636
N		 201 INIT_LIST_HEAD(&dp->dl_perfile);
202 INIT_LIST_HEAD(&dp->dl_perclnt);
1da177e4
LT		 203 INIT_LIST_HEAD(&dp->dl_recall_lru);
204 dp->dl_client = clp;
13cd2184 205 get_nfs4_file(fp);
1da177e4
LT		 206 dp->dl_file = fp;
207 dp->dl_flock = NULL;
208 get_file(stp->st_vfs_file);
209 dp->dl_vfs_file = stp->st_vfs_file;
210 dp->dl_type = type;
211 dp->dl_recall.cbr_dp = NULL;
212 dp->dl_recall.cbr_ident = cb->cb_ident;
213 dp->dl_recall.cbr_trunc = 0;
214 dp->dl_stateid.si_boot = boot_time;
215 dp->dl_stateid.si_stateownerid = current_delegid++;
216 dp->dl_stateid.si_fileid = 0;
217 dp->dl_stateid.si_generation = 0;
218 dp->dl_fhlen = current_fh->fh_handle.fh_size;
219 memcpy(dp->dl_fhval, &current_fh->fh_handle.fh_base,
220 current_fh->fh_handle.fh_size);
221 dp->dl_time = 0;
222 atomic_set(&dp->dl_count, 1);
ea1da636
N		 223 list_add(&dp->dl_perfile, &fp->fi_delegations);
224 list_add(&dp->dl_perclnt, &clp->cl_delegations);
1da177e4
LT		 225 return dp;
226}
227
228void
229nfs4_put_delegation(struct nfs4_delegation *dp)
230{
231 if (atomic_dec_and_test(&dp->dl_count)) {
232 dprintk("NFSD: freeing dp %p\n",dp);
13cd2184 233 put_nfs4_file(dp->dl_file);
5b2d21c1 234 kmem_cache_free(deleg_slab, dp);
ef0f3390 235 num_delegations--;
1da177e4
LT		 236 }
237}
238
239/* Remove the associated file_lock first, then remove the delegation.
240 * lease_modify() is called to remove the FS_LEASE file_lock from
241 * the i_flock list, eventually calling nfsd's lock_manager
242 * fl_release_callback.
243 */
244static void
245nfs4_close_delegation(struct nfs4_delegation *dp)
246{
247 struct file *filp = dp->dl_vfs_file;
248
249 dprintk("NFSD: close_delegation dp %p\n",dp);
250 dp->dl_vfs_file = NULL;
251 /* The following nfsd_close may not actually close the file,
252 * but we want to remove the lease in any case. */
c907132d
N		 253 if (dp->dl_flock)
254 setlease(filp, F_UNLCK, &dp->dl_flock);
1da177e4 255 nfsd_close(filp);
1da177e4
LT		 256}
257
258/* Called under the state lock. */
259static void
260unhash_delegation(struct nfs4_delegation *dp)
261{
ea1da636
N		 262 list_del_init(&dp->dl_perfile);
263 list_del_init(&dp->dl_perclnt);
1da177e4
LT		 264 spin_lock(&recall_lock);
265 list_del_init(&dp->dl_recall_lru);
266 spin_unlock(&recall_lock);
267 nfs4_close_delegation(dp);
268 nfs4_put_delegation(dp);
269}
270
271/*
272 * SETCLIENTID state
273 */
274
275/* Hash tables for nfs4_clientid state */
276#define CLIENT_HASH_BITS 4
277#define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS)
278#define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1)
279
280#define clientid_hashval(id) \
281 ((id) & CLIENT_HASH_MASK)
a55370a3
N		 282#define clientstr_hashval(name) \
283 (opaque_hashval((name), 8) & CLIENT_HASH_MASK)
1da177e4
LT		 284/*
285 * reclaim_str_hashtbl[] holds known client info from previous reset/reboot
286 * used in reboot/reset lease grace period processing
287 *
288 * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed
289 * setclientid_confirmed info.
290 *
291 * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed
292 * setclientid info.
293 *
294 * client_lru holds client queue ordered by nfs4_client.cl_time
295 * for lease renewal.
296 *
297 * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time
298 * for last close replay.
299 */
300static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE];
301static int reclaim_str_hashtbl_size = 0;
302static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE];
303static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE];
304static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE];
305static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE];
306static struct list_head client_lru;
307static struct list_head close_lru;
308
309static inline void
310renew_client(struct nfs4_client *clp)
311{
312 /*
313 * Move client to the end to the LRU list.
314 */
315 dprintk("renewing client (clientid %08x/%08x)\n",
316 clp->cl_clientid.cl_boot,
317 clp->cl_clientid.cl_id);
318 list_move_tail(&clp->cl_lru, &client_lru);
319 clp->cl_time = get_seconds();
320}
321
322/* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
323static int
324STALE_CLIENTID(clientid_t *clid)
325{
326 if (clid->cl_boot == boot_time)
327 return 0;
328 dprintk("NFSD stale clientid (%08x/%08x)\n",
329 clid->cl_boot, clid->cl_id);
330 return 1;
331}
332
333/*
334 * XXX Should we use a slab cache ?
335 * This type of memory management is somewhat inefficient, but we use it
336 * anyway since SETCLIENTID is not a common operation.
337 */
338static inline struct nfs4_client *
339alloc_client(struct xdr_netobj name)
340{
341 struct nfs4_client *clp;
342
f8314dc6 343 if ((clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL))!= NULL) {
1da177e4
LT		 344 if ((clp->cl_name.data = kmalloc(name.len, GFP_KERNEL)) != NULL) {
345 memcpy(clp->cl_name.data, name.data, name.len);
346 clp->cl_name.len = name.len;
347 }
348 else {
349 kfree(clp);
350 clp = NULL;
351 }
352 }
353 return clp;
354}
355
356static inline void
357free_client(struct nfs4_client *clp)
358{
359 if (clp->cl_cred.cr_group_info)
360 put_group_info(clp->cl_cred.cr_group_info);
361 kfree(clp->cl_name.data);
362 kfree(clp);
363}
364
365void
366put_nfs4_client(struct nfs4_client *clp)
367{
368 if (atomic_dec_and_test(&clp->cl_count))
369 free_client(clp);
370}
371
4e2fd495
N		 372static void
373shutdown_callback_client(struct nfs4_client *clp)
374{
375 struct rpc_clnt *clnt = clp->cl_callback.cb_client;
376
377 /* shutdown rpc client, ending any outstanding recall rpcs */
378 if (clnt) {
379 clp->cl_callback.cb_client = NULL;
380 rpc_shutdown_client(clnt);
4e2fd495
N		 381 }
382}
383
1da177e4
LT		 384static void
385expire_client(struct nfs4_client *clp)
386{
387 struct nfs4_stateowner *sop;
388 struct nfs4_delegation *dp;
1da177e4
LT		 389 struct list_head reaplist;
390
391 dprintk("NFSD: expire_client cl_count %d\n",
392 atomic_read(&clp->cl_count));
393
4e2fd495 394 shutdown_callback_client(clp);
1da177e4
LT		 395
396 INIT_LIST_HEAD(&reaplist);
397 spin_lock(&recall_lock);
ea1da636
N		 398 while (!list_empty(&clp->cl_delegations)) {
399 dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt);
1da177e4
LT		 400 dprintk("NFSD: expire client. dp %p, fp %p\n", dp,
401 dp->dl_flock);
ea1da636 402 list_del_init(&dp->dl_perclnt);
1da177e4
LT		 403 list_move(&dp->dl_recall_lru, &reaplist);
404 }
405 spin_unlock(&recall_lock);
406 while (!list_empty(&reaplist)) {
407 dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru);
408 list_del_init(&dp->dl_recall_lru);
409 unhash_delegation(dp);
410 }
411 list_del(&clp->cl_idhash);
412 list_del(&clp->cl_strhash);
413 list_del(&clp->cl_lru);
ea1da636
N		 414 while (!list_empty(&clp->cl_openowners)) {
415 sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient);
1da177e4
LT		 416 release_stateowner(sop);
417 }
418 put_nfs4_client(clp);
419}
420
421static struct nfs4_client *
a55370a3 422create_client(struct xdr_netobj name, char *recdir) {
1da177e4
LT		 423 struct nfs4_client *clp;
424
425 if (!(clp = alloc_client(name)))
426 goto out;
a55370a3 427 memcpy(clp->cl_recdir, recdir, HEXDIR_LEN);
1da177e4
LT		 428 atomic_set(&clp->cl_count, 1);
429 atomic_set(&clp->cl_callback.cb_set, 0);
1da177e4
LT		 430 INIT_LIST_HEAD(&clp->cl_idhash);
431 INIT_LIST_HEAD(&clp->cl_strhash);
ea1da636
N		 432 INIT_LIST_HEAD(&clp->cl_openowners);
433 INIT_LIST_HEAD(&clp->cl_delegations);
1da177e4
LT		 434 INIT_LIST_HEAD(&clp->cl_lru);
435out:
436 return clp;
437}
438
439static void
440copy_verf(struct nfs4_client *target, nfs4_verifier *source) {
441 memcpy(target->cl_verifier.data, source->data, sizeof(target->cl_verifier.data));
442}
443
444static void
445copy_clid(struct nfs4_client *target, struct nfs4_client *source) {
446 target->cl_clientid.cl_boot = source->cl_clientid.cl_boot;
447 target->cl_clientid.cl_id = source->cl_clientid.cl_id;
448}
449
450static void
451copy_cred(struct svc_cred *target, struct svc_cred *source) {
452
453 target->cr_uid = source->cr_uid;
454 target->cr_gid = source->cr_gid;
455 target->cr_group_info = source->cr_group_info;
456 get_group_info(target->cr_group_info);
457}
458
a55370a3
N		 459static inline int
460same_name(const char *n1, const char *n2) {
461 return 0 == memcmp(n1, n2, HEXDIR_LEN);
1da177e4
LT		 462}
463
464static int
465cmp_verf(nfs4_verifier *v1, nfs4_verifier *v2) {
466 return(!memcmp(v1->data,v2->data,sizeof(v1->data)));
467}
468
469static int
470cmp_clid(clientid_t * cl1, clientid_t * cl2) {
471 return((cl1->cl_boot == cl2->cl_boot) &&
472 (cl1->cl_id == cl2->cl_id));
473}
474
475/* XXX what about NGROUP */
476static int
477cmp_creds(struct svc_cred *cr1, struct svc_cred *cr2){
478 return(cr1->cr_uid == cr2->cr_uid);
479
480}
481
482static void
483gen_clid(struct nfs4_client *clp) {
484 clp->cl_clientid.cl_boot = boot_time;
485 clp->cl_clientid.cl_id = current_clientid++;
486}
487
488static void
489gen_confirm(struct nfs4_client *clp) {
490 struct timespec tv;
491 u32 * p;
492
493 tv = CURRENT_TIME;
494 p = (u32 *)clp->cl_confirm.data;
495 *p++ = tv.tv_sec;
496 *p++ = tv.tv_nsec;
497}
498
499static int
500check_name(struct xdr_netobj name) {
501
502 if (name.len == 0)
503 return 0;
504 if (name.len > NFS4_OPAQUE_LIMIT) {
505 printk("NFSD: check_name: name too long(%d)!\n", name.len);
506 return 0;
507 }
508 return 1;
509}
510
fd39ca9a 511static void
1da177e4
LT		 512add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval)
513{
514 unsigned int idhashval;
515
516 list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]);
517 idhashval = clientid_hashval(clp->cl_clientid.cl_id);
518 list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]);
519 list_add_tail(&clp->cl_lru, &client_lru);
520 clp->cl_time = get_seconds();
521}
522
fd39ca9a 523static void
1da177e4
LT		 524move_to_confirmed(struct nfs4_client *clp)
525{
526 unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id);
527 unsigned int strhashval;
528
529 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp);
530 list_del_init(&clp->cl_strhash);
f116629d 531 list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]);
a55370a3 532 strhashval = clientstr_hashval(clp->cl_recdir);
1da177e4
LT		 533 list_add(&clp->cl_strhash, &conf_str_hashtbl[strhashval]);
534 renew_client(clp);
535}
536
537static struct nfs4_client *
538find_confirmed_client(clientid_t *clid)
539{
540 struct nfs4_client *clp;
541 unsigned int idhashval = clientid_hashval(clid->cl_id);
542
543 list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) {
544 if (cmp_clid(&clp->cl_clientid, clid))
545 return clp;
546 }
547 return NULL;
548}
549
550static struct nfs4_client *
551find_unconfirmed_client(clientid_t *clid)
552{
553 struct nfs4_client *clp;
554 unsigned int idhashval = clientid_hashval(clid->cl_id);
555
556 list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) {
557 if (cmp_clid(&clp->cl_clientid, clid))
558 return clp;
559 }
560 return NULL;
561}
562
28ce6054
N		 563static struct nfs4_client *
564find_confirmed_client_by_str(const char *dname, unsigned int hashval)
565{
566 struct nfs4_client *clp;
567
568 list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) {
569 if (same_name(clp->cl_recdir, dname))
570 return clp;
571 }
572 return NULL;
573}
574
575static struct nfs4_client *
576find_unconfirmed_client_by_str(const char *dname, unsigned int hashval)
577{
578 struct nfs4_client *clp;
579
580 list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) {
581 if (same_name(clp->cl_recdir, dname))
582 return clp;
583 }
584 return NULL;
585}
586
1da177e4
LT		 587/* a helper function for parse_callback */
588static int
589parse_octet(unsigned int *lenp, char **addrp)
590{
591 unsigned int len = *lenp;
592 char *p = *addrp;
593 int n = -1;
594 char c;
595
596 for (;;) {
597 if (!len)
598 break;
599 len--;
600 c = *p++;
601 if (c == '.')
602 break;
603 if ((c < '0') || (c > '9')) {
604 n = -1;
605 break;
606 }
607 if (n < 0)
608 n = 0;
609 n = (n * 10) + (c - '0');
610 if (n > 255) {
611 n = -1;
612 break;
613 }
614 }
615 *lenp = len;
616 *addrp = p;
617 return n;
618}
619
620/* parse and set the setclientid ipv4 callback address */
fd39ca9a 621static int
1da177e4
LT		 622parse_ipv4(unsigned int addr_len, char *addr_val, unsigned int *cbaddrp, unsigned short *cbportp)
623{
624 int temp = 0;
625 u32 cbaddr = 0;
626 u16 cbport = 0;
627 u32 addrlen = addr_len;
628 char *addr = addr_val;
629 int i, shift;
630
631 /* ipaddress */
632 shift = 24;
633 for(i = 4; i > 0 ; i--) {
634 if ((temp = parse_octet(&addrlen, &addr)) < 0) {
635 return 0;
636 }
637 cbaddr |= (temp << shift);
638 if (shift > 0)
639 shift -= 8;
640 }
641 *cbaddrp = cbaddr;
642
643 /* port */
644 shift = 8;
645 for(i = 2; i > 0 ; i--) {
646 if ((temp = parse_octet(&addrlen, &addr)) < 0) {
647 return 0;
648 }
649 cbport |= (temp << shift);
650 if (shift > 0)
651 shift -= 8;
652 }
653 *cbportp = cbport;
654 return 1;
655}
656
fd39ca9a 657static void
1da177e4
LT		 658gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se)
659{
660 struct nfs4_callback *cb = &clp->cl_callback;
661
662 /* Currently, we only support tcp for the callback channel */
663 if ((se->se_callback_netid_len != 3) || memcmp((char *)se->se_callback_netid_val, "tcp", 3))
664 goto out_err;
665
666 if ( !(parse_ipv4(se->se_callback_addr_len, se->se_callback_addr_val,
667 &cb->cb_addr, &cb->cb_port)))
668 goto out_err;
669 cb->cb_prog = se->se_callback_prog;
670 cb->cb_ident = se->se_callback_ident;
1da177e4
LT		 671 return;
672out_err:
849823c5 673 dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) "
1da177e4
LT		 674 "will not receive delegations\n",
675 clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id);
676
1da177e4
LT		 677 return;
678}
679
680/*
681 * RFC 3010 has a complex implmentation description of processing a
682 * SETCLIENTID request consisting of 5 bullets, labeled as
683 * CASE0 - CASE4 below.
684 *
685 * NOTES:
686 * callback information will be processed in a future patch
687 *
688 * an unconfirmed record is added when:
689 * NORMAL (part of CASE 4): there is no confirmed nor unconfirmed record.
690 * CASE 1: confirmed record found with matching name, principal,
691 * verifier, and clientid.
692 * CASE 2: confirmed record found with matching name, principal,
693 * and there is no unconfirmed record with matching
694 * name and principal
695 *
696 * an unconfirmed record is replaced when:
697 * CASE 3: confirmed record found with matching name, principal,
698 * and an unconfirmed record is found with matching
699 * name, principal, and with clientid and
700 * confirm that does not match the confirmed record.
701 * CASE 4: there is no confirmed record with matching name and
702 * principal. there is an unconfirmed record with
703 * matching name, principal.
704 *
705 * an unconfirmed record is deleted when:
706 * CASE 1: an unconfirmed record that matches input name, verifier,
707 * and confirmed clientid.
708 * CASE 4: any unconfirmed records with matching name and principal
709 * that exist after an unconfirmed record has been replaced
710 * as described above.
711 *
712 */
b37ad28b 713__be32
b591480b
BF		 714nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
715 struct nfsd4_setclientid *setclid)
1da177e4 716{
27459f09 717 struct sockaddr_in *sin = svc_addr_in(rqstp);
1da177e4
LT		 718 struct xdr_netobj clname = {
719 .len = setclid->se_namelen,
720 .data = setclid->se_name,
721 };
722 nfs4_verifier clverifier = setclid->se_verf;
723 unsigned int strhashval;
28ce6054 724 struct nfs4_client *conf, *unconf, *new;
b37ad28b 725 __be32 status;
a55370a3 726 char dname[HEXDIR_LEN];
1da177e4 727
1da177e4 728 if (!check_name(clname))
73aea4ec 729 return nfserr_inval;
1da177e4 730
a55370a3
N		 731 status = nfs4_make_rec_clidname(dname, &clname);
732 if (status)
73aea4ec 733 return status;
a55370a3 734
1da177e4
LT		 735 /*
736 * XXX The Duplicate Request Cache (DRC) has been checked (??)
737 * We get here on a DRC miss.
738 */
739
a55370a3 740 strhashval = clientstr_hashval(dname);
1da177e4 741
1da177e4 742 nfs4_lock_state();
28ce6054
N		 743 conf = find_confirmed_client_by_str(dname, strhashval);
744 if (conf) {
1da177e4
LT		 745 /*
746 * CASE 0:
747 * clname match, confirmed, different principal
748 * or different ip_address
749 */
750 status = nfserr_clid_inuse;
28ce6054 751 if (!cmp_creds(&conf->cl_cred, &rqstp->rq_cred)
27459f09 752 || conf->cl_addr != sin->sin_addr.s_addr) {
21315edd
BF		 753 dprintk("NFSD: setclientid: string in use by client"
754 "at %u.%u.%u.%u\n", NIPQUAD(conf->cl_addr));
1da177e4
LT		 755 goto out;
756 }
1da177e4 757 }
28ce6054 758 unconf = find_unconfirmed_client_by_str(dname, strhashval);
1da177e4
LT		 759 status = nfserr_resource;
760 if (!conf) {
761 /*
762 * CASE 4:
763 * placed first, because it is the normal case.
764 */
765 if (unconf)
766 expire_client(unconf);
a55370a3
N		 767 new = create_client(clname, dname);
768 if (new == NULL)
1da177e4
LT		 769 goto out;
770 copy_verf(new, &clverifier);
27459f09 771 new->cl_addr = sin->sin_addr.s_addr;
1da177e4
LT		 772 copy_cred(&new->cl_cred,&rqstp->rq_cred);
773 gen_clid(new);
774 gen_confirm(new);
775 gen_callback(new, setclid);
776 add_to_unconfirmed(new, strhashval);
777 } else if (cmp_verf(&conf->cl_verifier, &clverifier)) {
778 /*
779 * CASE 1:
780 * cl_name match, confirmed, principal match
781 * verifier match: probable callback update
782 *
783 * remove any unconfirmed nfs4_client with
784 * matching cl_name, cl_verifier, and cl_clientid
785 *
786 * create and insert an unconfirmed nfs4_client with same
787 * cl_name, cl_verifier, and cl_clientid as existing
788 * nfs4_client, but with the new callback info and a
789 * new cl_confirm
790 */
31f4a6c1
N		 791 if (unconf) {
792 /* Note this is removing unconfirmed {*x***},
793 * which is stronger than RFC recommended {vxc**}.
794 * This has the advantage that there is at most
795 * one {*x***} in either list at any time.
796 */
797 expire_client(unconf);
1da177e4 798 }
a55370a3
N		 799 new = create_client(clname, dname);
800 if (new == NULL)
1da177e4
LT		 801 goto out;
802 copy_verf(new,&conf->cl_verifier);
27459f09 803 new->cl_addr = sin->sin_addr.s_addr;
1da177e4
LT		 804 copy_cred(&new->cl_cred,&rqstp->rq_cred);
805 copy_clid(new, conf);
806 gen_confirm(new);
807 gen_callback(new, setclid);
808 add_to_unconfirmed(new,strhashval);
809 } else if (!unconf) {
810 /*
811 * CASE 2:
812 * clname match, confirmed, principal match
813 * verfier does not match
814 * no unconfirmed. create a new unconfirmed nfs4_client
815 * using input clverifier, clname, and callback info
816 * and generate a new cl_clientid and cl_confirm.
817 */
a55370a3
N		 818 new = create_client(clname, dname);
819 if (new == NULL)
1da177e4
LT		 820 goto out;
821 copy_verf(new,&clverifier);
27459f09 822 new->cl_addr = sin->sin_addr.s_addr;
1da177e4
LT		 823 copy_cred(&new->cl_cred,&rqstp->rq_cred);
824 gen_clid(new);
825 gen_confirm(new);
826 gen_callback(new, setclid);
827 add_to_unconfirmed(new, strhashval);
828 } else if (!cmp_verf(&conf->cl_confirm, &unconf->cl_confirm)) {
829 /*
830 * CASE3:
831 * confirmed found (name, principal match)
832 * confirmed verifier does not match input clverifier
833 *
834 * unconfirmed found (name match)
835 * confirmed->cl_confirm != unconfirmed->cl_confirm
836 *
837 * remove unconfirmed.
838 *
839 * create an unconfirmed nfs4_client
840 * with same cl_name as existing confirmed nfs4_client,
841 * but with new callback info, new cl_clientid,
842 * new cl_verifier and a new cl_confirm
843 */
844 expire_client(unconf);
a55370a3
N		 845 new = create_client(clname, dname);
846 if (new == NULL)
1da177e4
LT		 847 goto out;
848 copy_verf(new,&clverifier);
27459f09 849 new->cl_addr = sin->sin_addr.s_addr;
1da177e4
LT		 850 copy_cred(&new->cl_cred,&rqstp->rq_cred);
851 gen_clid(new);
852 gen_confirm(new);
853 gen_callback(new, setclid);
854 add_to_unconfirmed(new, strhashval);
855 } else {
856 /* No cases hit !!! */
857 status = nfserr_inval;
858 goto out;
859
860 }
861 setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot;
862 setclid->se_clientid.cl_id = new->cl_clientid.cl_id;
863 memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data));
864 status = nfs_ok;
865out:
866 nfs4_unlock_state();
867 return status;
868}
869
870
871/*
872 * RFC 3010 has a complex implmentation description of processing a
873 * SETCLIENTID_CONFIRM request consisting of 4 bullets describing
874 * processing on a DRC miss, labeled as CASE1 - CASE4 below.
875 *
876 * NOTE: callback information will be processed here in a future patch
877 */
b37ad28b 878__be32
b591480b
BF		 879nfsd4_setclientid_confirm(struct svc_rqst *rqstp,
880 struct nfsd4_compound_state *cstate,
881 struct nfsd4_setclientid_confirm *setclientid_confirm)
1da177e4 882{
27459f09 883 struct sockaddr_in *sin = svc_addr_in(rqstp);
21ab45a4 884 struct nfs4_client *conf, *unconf;
1da177e4
LT		 885 nfs4_verifier confirm = setclientid_confirm->sc_confirm;
886 clientid_t * clid = &setclientid_confirm->sc_clientid;
b37ad28b 887 __be32 status;
1da177e4
LT		 888
889 if (STALE_CLIENTID(clid))
890 return nfserr_stale_clientid;
891 /*
892 * XXX The Duplicate Request Cache (DRC) has been checked (??)
893 * We get here on a DRC miss.
894 */
895
896 nfs4_lock_state();
21ab45a4
N		 897
898 conf = find_confirmed_client(clid);
899 unconf = find_unconfirmed_client(clid);
900
901 status = nfserr_clid_inuse;
27459f09 902 if (conf && conf->cl_addr != sin->sin_addr.s_addr)
21ab45a4 903 goto out;
27459f09 904 if (unconf && unconf->cl_addr != sin->sin_addr.s_addr)
21ab45a4
N		 905 goto out;
906
1da177e4
LT		 907 if ((conf && unconf) &&
908 (cmp_verf(&unconf->cl_confirm, &confirm)) &&
909 (cmp_verf(&conf->cl_verifier, &unconf->cl_verifier)) &&
a55370a3 910 (same_name(conf->cl_recdir,unconf->cl_recdir)) &&
1da177e4 911 (!cmp_verf(&conf->cl_confirm, &unconf->cl_confirm))) {
7c79f737
N		 912 /* CASE 1:
913 * unconf record that matches input clientid and input confirm.
914 * conf record that matches input clientid.
915 * conf and unconf records match names, verifiers
916 */
1da177e4
LT		 917 if (!cmp_creds(&conf->cl_cred, &unconf->cl_cred))
918 status = nfserr_clid_inuse;
919 else {
1a69c179
N		 920 /* XXX: We just turn off callbacks until we can handle
921 * change request correctly. */
cb36d634 922 atomic_set(&conf->cl_callback.cb_set, 0);
21ab45a4 923 gen_confirm(conf);
46309029 924 nfsd4_remove_clid_dir(unconf);
1a69c179 925 expire_client(unconf);
1da177e4 926 status = nfs_ok;
1a69c179 927
1da177e4 928 }
7c79f737 929 } else if ((conf && !unconf) ||
1da177e4
LT		 930 ((conf && unconf) &&
931 (!cmp_verf(&conf->cl_verifier, &unconf->cl_verifier) ||
a55370a3 932 !same_name(conf->cl_recdir, unconf->cl_recdir)))) {
7c79f737
N		 933 /* CASE 2:
934 * conf record that matches input clientid.
935 * if unconf record matches input clientid, then
936 * unconf->cl_name or unconf->cl_verifier don't match the
937 * conf record.
938 */
21ab45a4 939 if (!cmp_creds(&conf->cl_cred,&rqstp->rq_cred))
1da177e4 940 status = nfserr_clid_inuse;
21ab45a4 941 else
1da177e4 942 status = nfs_ok;
7c79f737
N		 943 } else if (!conf && unconf
944 && cmp_verf(&unconf->cl_confirm, &confirm)) {
945 /* CASE 3:
946 * conf record not found.
947 * unconf record found.
948 * unconf->cl_confirm matches input confirm
949 */
1da177e4
LT		 950 if (!cmp_creds(&unconf->cl_cred, &rqstp->rq_cred)) {
951 status = nfserr_clid_inuse;
952 } else {
1a69c179
N		 953 unsigned int hash =
954 clientstr_hashval(unconf->cl_recdir);
955 conf = find_confirmed_client_by_str(unconf->cl_recdir,
956 hash);
957 if (conf) {
c7b9a459 958 nfsd4_remove_clid_dir(conf);
1a69c179
N		 959 expire_client(conf);
960 }
1da177e4 961 move_to_confirmed(unconf);
21ab45a4 962 conf = unconf;
1a69c179 963 status = nfs_ok;
1da177e4 964 }
7c79f737
N		 965 } else if ((!conf || (conf && !cmp_verf(&conf->cl_confirm, &confirm)))
966 && (!unconf || (unconf && !cmp_verf(&unconf->cl_confirm,
967 &confirm)))) {
968 /* CASE 4:
969 * conf record not found, or if conf, conf->cl_confirm does not
970 * match input confirm.
971 * unconf record not found, or if unconf, unconf->cl_confirm
972 * does not match input confirm.
973 */
1da177e4 974 status = nfserr_stale_clientid;
7c79f737 975 } else {
08e8987c
N		 976 /* check that we have hit one of the cases...*/
977 status = nfserr_clid_inuse;
978 }
1da177e4
LT		 979out:
980 if (!status)
21ab45a4 981 nfsd4_probe_callback(conf);
1da177e4
LT		 982 nfs4_unlock_state();
983 return status;
984}
985
1da177e4
LT		 986/* OPEN Share state helper functions */
987static inline struct nfs4_file *
988alloc_init_file(struct inode *ino)
989{
990 struct nfs4_file *fp;
991 unsigned int hashval = file_hashval(ino);
992
e60d4398
N		 993 fp = kmem_cache_alloc(file_slab, GFP_KERNEL);
994 if (fp) {
13cd2184 995 kref_init(&fp->fi_ref);
1da177e4 996 INIT_LIST_HEAD(&fp->fi_hash);
8beefa24
N		 997 INIT_LIST_HEAD(&fp->fi_stateids);
998 INIT_LIST_HEAD(&fp->fi_delegations);
1da177e4
LT		 999 list_add(&fp->fi_hash, &file_hashtbl[hashval]);
1000 fp->fi_inode = igrab(ino);
1001 fp->fi_id = current_fileid++;
1da177e4
LT		 1002 return fp;
1003 }
1004 return NULL;
1005}
1006
e60d4398 1007static void
e18b890b 1008nfsd4_free_slab(struct kmem_cache **slab)
1da177e4 1009{
e60d4398
N		 1010 if (*slab == NULL)
1011 return;
1a1d92c1 1012 kmem_cache_destroy(*slab);
e60d4398 1013 *slab = NULL;
1da177e4
LT		 1014}
1015
1016static void
1017nfsd4_free_slabs(void)
1018{
e60d4398
N		 1019 nfsd4_free_slab(&stateowner_slab);
1020 nfsd4_free_slab(&file_slab);
5ac049ac 1021 nfsd4_free_slab(&stateid_slab);
5b2d21c1 1022 nfsd4_free_slab(&deleg_slab);
e60d4398 1023}
1da177e4 1024
e60d4398
N		 1025static int
1026nfsd4_init_slabs(void)
1027{
1028 stateowner_slab = kmem_cache_create("nfsd4_stateowners",
1029 sizeof(struct nfs4_stateowner), 0, 0, NULL, NULL);
1030 if (stateowner_slab == NULL)
1031 goto out_nomem;
1032 file_slab = kmem_cache_create("nfsd4_files",
1033 sizeof(struct nfs4_file), 0, 0, NULL, NULL);
1034 if (file_slab == NULL)
1035 goto out_nomem;
5ac049ac
N		 1036 stateid_slab = kmem_cache_create("nfsd4_stateids",
1037 sizeof(struct nfs4_stateid), 0, 0, NULL, NULL);
1038 if (stateid_slab == NULL)
1039 goto out_nomem;
5b2d21c1
N		 1040 deleg_slab = kmem_cache_create("nfsd4_delegations",
1041 sizeof(struct nfs4_delegation), 0, 0, NULL, NULL);
1042 if (deleg_slab == NULL)
1043 goto out_nomem;
e60d4398
N		 1044 return 0;
1045out_nomem:
1046 nfsd4_free_slabs();
1047 dprintk("nfsd4: out of memory while initializing nfsv4\n");
1048 return -ENOMEM;
1da177e4
LT		 1049}
1050
1051void
1052nfs4_free_stateowner(struct kref *kref)
1053{
1054 struct nfs4_stateowner *sop =
1055 container_of(kref, struct nfs4_stateowner, so_ref);
1056 kfree(sop->so_owner.data);
1057 kmem_cache_free(stateowner_slab, sop);
1058}
1059
1060static inline struct nfs4_stateowner *
1061alloc_stateowner(struct xdr_netobj *owner)
1062{
1063 struct nfs4_stateowner *sop;
1064
1065 if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) {
1066 if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) {
1067 memcpy(sop->so_owner.data, owner->data, owner->len);
1068 sop->so_owner.len = owner->len;
1069 kref_init(&sop->so_ref);
1070 return sop;
1071 }
1072 kmem_cache_free(stateowner_slab, sop);
1073 }
1074 return NULL;
1075}
1076
1077static struct nfs4_stateowner *
1078alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) {
1079 struct nfs4_stateowner *sop;
1080 struct nfs4_replay *rp;
1081 unsigned int idhashval;
1082
1083 if (!(sop = alloc_stateowner(&open->op_owner)))
1084 return NULL;
1085 idhashval = ownerid_hashval(current_ownerid);
1086 INIT_LIST_HEAD(&sop->so_idhash);
1087 INIT_LIST_HEAD(&sop->so_strhash);
1088 INIT_LIST_HEAD(&sop->so_perclient);
ea1da636
N		 1089 INIT_LIST_HEAD(&sop->so_stateids);
1090 INIT_LIST_HEAD(&sop->so_perstateid); /* not used */
1da177e4
LT		 1091 INIT_LIST_HEAD(&sop->so_close_lru);
1092 sop->so_time = 0;
1093 list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]);
1094 list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]);
ea1da636 1095 list_add(&sop->so_perclient, &clp->cl_openowners);
1da177e4
LT		 1096 sop->so_is_open_owner = 1;
1097 sop->so_id = current_ownerid++;
1098 sop->so_client = clp;
1099 sop->so_seqid = open->op_seqid;
1100 sop->so_confirmed = 0;
1101 rp = &sop->so_replay;
de1ae286 1102 rp->rp_status = nfserr_serverfault;
1da177e4
LT		 1103 rp->rp_buflen = 0;
1104 rp->rp_buf = rp->rp_ibuf;
1105 return sop;
1106}
1107
1108static void
1109release_stateid_lockowners(struct nfs4_stateid *open_stp)
1110{
1111 struct nfs4_stateowner *lock_sop;
1112
ea1da636
N		 1113 while (!list_empty(&open_stp->st_lockowners)) {
1114 lock_sop = list_entry(open_stp->st_lockowners.next,
1115 struct nfs4_stateowner, so_perstateid);
1116 /* list_del(&open_stp->st_lockowners); */
1da177e4
LT		 1117 BUG_ON(lock_sop->so_is_open_owner);
1118 release_stateowner(lock_sop);
1119 }
1120}
1121
1122static void
1123unhash_stateowner(struct nfs4_stateowner *sop)
1124{
1125 struct nfs4_stateid *stp;
1126
1127 list_del(&sop->so_idhash);
1128 list_del(&sop->so_strhash);
6fa305de 1129 if (sop->so_is_open_owner)
1da177e4 1130 list_del(&sop->so_perclient);
ea1da636
N		 1131 list_del(&sop->so_perstateid);
1132 while (!list_empty(&sop->so_stateids)) {
1133 stp = list_entry(sop->so_stateids.next,
1134 struct nfs4_stateid, st_perstateowner);
1da177e4
LT		 1135 if (sop->so_is_open_owner)
1136 release_stateid(stp, OPEN_STATE);
1137 else
1138 release_stateid(stp, LOCK_STATE);
1139 }
1140}
1141
1142static void
1143release_stateowner(struct nfs4_stateowner *sop)
1144{
1145 unhash_stateowner(sop);
1146 list_del(&sop->so_close_lru);
1147 nfs4_put_stateowner(sop);
1148}
1149
1150static inline void
1151init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) {
1152 struct nfs4_stateowner *sop = open->op_stateowner;
1153 unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id);
1154
1155 INIT_LIST_HEAD(&stp->st_hash);
ea1da636
N		 1156 INIT_LIST_HEAD(&stp->st_perstateowner);
1157 INIT_LIST_HEAD(&stp->st_lockowners);
1da177e4
LT		 1158 INIT_LIST_HEAD(&stp->st_perfile);
1159 list_add(&stp->st_hash, &stateid_hashtbl[hashval]);
ea1da636 1160 list_add(&stp->st_perstateowner, &sop->so_stateids);
8beefa24 1161 list_add(&stp->st_perfile, &fp->fi_stateids);
1da177e4 1162 stp->st_stateowner = sop;
13cd2184 1163 get_nfs4_file(fp);
1da177e4
LT		 1164 stp->st_file = fp;
1165 stp->st_stateid.si_boot = boot_time;
1166 stp->st_stateid.si_stateownerid = sop->so_id;
1167 stp->st_stateid.si_fileid = fp->fi_id;
1168 stp->st_stateid.si_generation = 0;
1169 stp->st_access_bmap = 0;
1170 stp->st_deny_bmap = 0;
1171 __set_bit(open->op_share_access, &stp->st_access_bmap);
1172 __set_bit(open->op_share_deny, &stp->st_deny_bmap);
4c4cd222 1173 stp->st_openstp = NULL;
1da177e4
LT		 1174}
1175
1176static void
1177release_stateid(struct nfs4_stateid *stp, int flags)
1178{
1179 struct file *filp = stp->st_vfs_file;
1180
1181 list_del(&stp->st_hash);
1da177e4 1182 list_del(&stp->st_perfile);
ea1da636 1183 list_del(&stp->st_perstateowner);
1da177e4
LT		 1184 if (flags & OPEN_STATE) {
1185 release_stateid_lockowners(stp);
1186 stp->st_vfs_file = NULL;
1187 nfsd_close(filp);
1da177e4
LT		 1188 } else if (flags & LOCK_STATE)
1189 locks_remove_posix(filp, (fl_owner_t) stp->st_stateowner);
13cd2184 1190 put_nfs4_file(stp->st_file);
5ac049ac 1191 kmem_cache_free(stateid_slab, stp);
1da177e4
LT		 1192}
1193
fd39ca9a 1194static void
1da177e4
LT		 1195move_to_close_lru(struct nfs4_stateowner *sop)
1196{
1197 dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop);
1198
358dd55a 1199 list_move_tail(&sop->so_close_lru, &close_lru);
1da177e4
LT		 1200 sop->so_time = get_seconds();
1201}
1202
1da177e4
LT		 1203static int
1204cmp_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, clientid_t *clid) {
1205 return ((sop->so_owner.len == owner->len) &&
1206 !memcmp(sop->so_owner.data, owner->data, owner->len) &&
1207 (sop->so_client->cl_clientid.cl_id == clid->cl_id));
1208}
1209
1210static struct nfs4_stateowner *
1211find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open)
1212{
1213 struct nfs4_stateowner *so = NULL;
1214
1215 list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) {
1216 if (cmp_owner_str(so, &open->op_owner, &open->op_clientid))
1217 return so;
1218 }
1219 return NULL;
1220}
1221
1222/* search file_hashtbl[] for file */
1223static struct nfs4_file *
1224find_file(struct inode *ino)
1225{
1226 unsigned int hashval = file_hashval(ino);
1227 struct nfs4_file *fp;
1228
1229 list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) {
13cd2184
N		 1230 if (fp->fi_inode == ino) {
1231 get_nfs4_file(fp);
1da177e4 1232 return fp;
13cd2184 1233 }
1da177e4
LT		 1234 }
1235 return NULL;
1236}
1237
ba5a6a19
BF		 1238static int access_valid(u32 x)
1239{
1240 return (x > 0 && x < 4);
1241}
1242
1243static int deny_valid(u32 x)
1244{
1245 return (x >= 0 && x < 5);
1246}
1da177e4 1247
fd39ca9a 1248static void
1da177e4
LT		 1249set_access(unsigned int *access, unsigned long bmap) {
1250 int i;
1251
1252 *access = 0;
1253 for (i = 1; i < 4; i++) {
1254 if (test_bit(i, &bmap))
1255 *access |= i;
1256 }
1257}
1258
fd39ca9a 1259static void
1da177e4
LT		 1260set_deny(unsigned int *deny, unsigned long bmap) {
1261 int i;
1262
1263 *deny = 0;
1264 for (i = 0; i < 4; i++) {
1265 if (test_bit(i, &bmap))
1266 *deny |= i ;
1267 }
1268}
1269
1270static int
1271test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) {
1272 unsigned int access, deny;
1273
1274 set_access(&access, stp->st_access_bmap);
1275 set_deny(&deny, stp->st_deny_bmap);
1276 if ((access & open->op_share_deny) || (deny & open->op_share_access))
1277 return 0;
1278 return 1;
1279}
1280
1281/*
1282 * Called to check deny when READ with all zero stateid or
1283 * WRITE with all zero or all one stateid
1284 */
b37ad28b 1285static __be32
1da177e4
LT		 1286nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type)
1287{
1288 struct inode *ino = current_fh->fh_dentry->d_inode;
1289 struct nfs4_file *fp;
1290 struct nfs4_stateid *stp;
b37ad28b 1291 __be32 ret;
1da177e4
LT		 1292
1293 dprintk("NFSD: nfs4_share_conflict\n");
1294
1295 fp = find_file(ino);
13cd2184
N		 1296 if (!fp)
1297 return nfs_ok;
b700949b 1298 ret = nfserr_locked;
1da177e4 1299 /* Search for conflicting share reservations */
13cd2184
N		 1300 list_for_each_entry(stp, &fp->fi_stateids, st_perfile) {
1301 if (test_bit(deny_type, &stp->st_deny_bmap) ||
1302 test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap))
1303 goto out;
1da177e4 1304 }
13cd2184
N		 1305 ret = nfs_ok;
1306out:
1307 put_nfs4_file(fp);
1308 return ret;
1da177e4
LT		 1309}
1310
1311static inline void
1312nfs4_file_downgrade(struct file *filp, unsigned int share_access)
1313{
1314 if (share_access & NFS4_SHARE_ACCESS_WRITE) {
7eaa36e2 1315 put_write_access(filp->f_path.dentry->d_inode);
1da177e4
LT		 1316 filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE;
1317 }
1318}
1319
1320/*
1321 * Recall a delegation
1322 */
1323static int
1324do_recall(void *__dp)
1325{
1326 struct nfs4_delegation *dp = __dp;
1327
1da177e4
LT		 1328 nfsd4_cb_recall(dp);
1329 return 0;
1330}
1331
1332/*
1333 * Spawn a thread to perform a recall on the delegation represented
1334 * by the lease (file_lock)
1335 *
1336 * Called from break_lease() with lock_kernel() held.
1337 * Note: we assume break_lease will only call this *once* for any given
1338 * lease.
1339 */
1340static
1341void nfsd_break_deleg_cb(struct file_lock *fl)
1342{
1343 struct nfs4_delegation *dp= (struct nfs4_delegation *)fl->fl_owner;
1344 struct task_struct *t;
1345
1346 dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl);
1347 if (!dp)
1348 return;
1349
1350 /* We're assuming the state code never drops its reference
1351 * without first removing the lease. Since we're in this lease
1352 * callback (and since the lease code is serialized by the kernel
1353 * lock) we know the server hasn't removed the lease yet, we know
1354 * it's safe to take a reference: */
1355 atomic_inc(&dp->dl_count);
1356
1357 spin_lock(&recall_lock);
1358 list_add_tail(&dp->dl_recall_lru, &del_recall_lru);
1359 spin_unlock(&recall_lock);
1360
1361 /* only place dl_time is set. protected by lock_kernel*/
1362 dp->dl_time = get_seconds();
1363
1364 /* XXX need to merge NFSD_LEASE_TIME with fs/locks.c:lease_break_time */
1365 fl->fl_break_time = jiffies + NFSD_LEASE_TIME * HZ;
1366
1367 t = kthread_run(do_recall, dp, "%s", "nfs4_cb_recall");
1368 if (IS_ERR(t)) {
1369 struct nfs4_client *clp = dp->dl_client;
1370
1371 printk(KERN_INFO "NFSD: Callback thread failed for "
1372 "for client (clientid %08x/%08x)\n",
1373 clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id);
1374 nfs4_put_delegation(dp);
1375 }
1376}
1377
1378/*
1379 * The file_lock is being reapd.
1380 *
1381 * Called by locks_free_lock() with lock_kernel() held.
1382 */
1383static
1384void nfsd_release_deleg_cb(struct file_lock *fl)
1385{
1386 struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner;
1387
1388 dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count));
1389
1390 if (!(fl->fl_flags & FL_LEASE) || !dp)
1391 return;
1392 dp->dl_flock = NULL;
1393}
1394
1395/*
1396 * Set the delegation file_lock back pointer.
1397 *
1398 * Called from __setlease() with lock_kernel() held.
1399 */
1400static
1401void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl)
1402{
1403 struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner;
1404
1405 dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp);
1406 if (!dp)
1407 return;
1408 dp->dl_flock = new;
1409}
1410
1411/*
1412 * Called from __setlease() with lock_kernel() held
1413 */
1414static
1415int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try)
1416{
1417 struct nfs4_delegation *onlistd =
1418 (struct nfs4_delegation *)onlist->fl_owner;
1419 struct nfs4_delegation *tryd =
1420 (struct nfs4_delegation *)try->fl_owner;
1421
1422 if (onlist->fl_lmops != try->fl_lmops)
1423 return 0;
1424
1425 return onlistd->dl_client == tryd->dl_client;
1426}
1427
1428
1429static
1430int nfsd_change_deleg_cb(struct file_lock **onlist, int arg)
1431{
1432 if (arg & F_UNLCK)
1433 return lease_modify(onlist, arg);
1434 else
1435 return -EAGAIN;
1436}
1437
fd39ca9a 1438static struct lock_manager_operations nfsd_lease_mng_ops = {
1da177e4
LT		 1439 .fl_break = nfsd_break_deleg_cb,
1440 .fl_release_private = nfsd_release_deleg_cb,
1441 .fl_copy_lock = nfsd_copy_lock_deleg_cb,
1442 .fl_mylease = nfsd_same_client_deleg_cb,
1443 .fl_change = nfsd_change_deleg_cb,
1444};
1445
1446
b37ad28b 1447__be32
1da177e4
LT		 1448nfsd4_process_open1(struct nfsd4_open *open)
1449{
1da177e4
LT		 1450 clientid_t *clientid = &open->op_clientid;
1451 struct nfs4_client *clp = NULL;
1452 unsigned int strhashval;
1453 struct nfs4_stateowner *sop = NULL;
1454
1da177e4 1455 if (!check_name(open->op_owner))
0f442aa2 1456 return nfserr_inval;
1da177e4
LT		 1457
1458 if (STALE_CLIENTID(&open->op_clientid))
1459 return nfserr_stale_clientid;
1460
1461 strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner);
1462 sop = find_openstateowner_str(strhashval, open);
0f442aa2
BF		 1463 open->op_stateowner = sop;
1464 if (!sop) {
1465 /* Make sure the client's lease hasn't expired. */
1da177e4
LT		 1466 clp = find_confirmed_client(clientid);
1467 if (clp == NULL)
0f442aa2
BF		 1468 return nfserr_expired;
1469 goto renew;
1da177e4 1470 }
0f442aa2
BF		 1471 if (!sop->so_confirmed) {
1472 /* Replace unconfirmed owners without checking for replay. */
1473 clp = sop->so_client;
1474 release_stateowner(sop);
1475 open->op_stateowner = NULL;
1476 goto renew;
1477 }
1478 if (open->op_seqid == sop->so_seqid - 1) {
1479 if (sop->so_replay.rp_buflen)
a90b061c 1480 return nfserr_replay_me;
0f442aa2
BF		 1481 /* The original OPEN failed so spectacularly
1482 * that we don't even have replay data saved!
1483 * Therefore, we have no choice but to continue
1484 * processing this OPEN; presumably, we'll
1485 * fail again for the same reason.
1486 */
1487 dprintk("nfsd4_process_open1: replay with no replay cache\n");
1488 goto renew;
1489 }
1490 if (open->op_seqid != sop->so_seqid)
1491 return nfserr_bad_seqid;
1da177e4 1492renew:
0f442aa2
BF		 1493 if (open->op_stateowner == NULL) {
1494 sop = alloc_init_open_stateowner(strhashval, clp, open);
1495 if (sop == NULL)
1496 return nfserr_resource;
1497 open->op_stateowner = sop;
1498 }
1499 list_del_init(&sop->so_close_lru);
1da177e4 1500 renew_client(sop->so_client);
0f442aa2 1501 return nfs_ok;
1da177e4
LT		 1502}
1503
b37ad28b 1504static inline __be32
4a6e43e6
N		 1505nfs4_check_delegmode(struct nfs4_delegation *dp, int flags)
1506{
1507 if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ))
1508 return nfserr_openmode;
1509 else
1510 return nfs_ok;
1511}
1512
52f4fb43
N		 1513static struct nfs4_delegation *
1514find_delegation_file(struct nfs4_file *fp, stateid_t *stid)
1515{
1516 struct nfs4_delegation *dp;
1517
ea1da636 1518 list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) {
52f4fb43
N		 1519 if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid)
1520 return dp;
1521 }
1522 return NULL;
1523}
1524
b37ad28b 1525static __be32
567d9829
N		 1526nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open,
1527 struct nfs4_delegation **dp)
1528{
1529 int flags;
b37ad28b 1530 __be32 status = nfserr_bad_stateid;
567d9829
N		 1531
1532 *dp = find_delegation_file(fp, &open->op_delegate_stateid);
1533 if (*dp == NULL)
c44c5eeb 1534 goto out;
567d9829
N		 1535 flags = open->op_share_access == NFS4_SHARE_ACCESS_READ ?
1536 RD_STATE : WR_STATE;
1537 status = nfs4_check_delegmode(*dp, flags);
1538 if (status)
1539 *dp = NULL;
c44c5eeb
N		 1540out:
1541 if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR)
1542 return nfs_ok;
1543 if (status)
1544 return status;
1545 open->op_stateowner->so_confirmed = 1;
1546 return nfs_ok;
567d9829
N		 1547}
1548
b37ad28b 1549static __be32
1da177e4
LT		 1550nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp)
1551{
1552 struct nfs4_stateid *local;
b37ad28b 1553 __be32 status = nfserr_share_denied;
1da177e4
LT		 1554 struct nfs4_stateowner *sop = open->op_stateowner;
1555
8beefa24 1556 list_for_each_entry(local, &fp->fi_stateids, st_perfile) {
1da177e4
LT		 1557 /* ignore lock owners */
1558 if (local->st_stateowner->so_is_open_owner == 0)
1559 continue;
1560 /* remember if we have seen this open owner */
1561 if (local->st_stateowner == sop)
1562 *stpp = local;
1563 /* check for conflicting share reservations */
1564 if (!test_share(local, open))
1565 goto out;
1566 }
1567 status = 0;
1568out:
1569 return status;
1570}
1571
5ac049ac
N		 1572static inline struct nfs4_stateid *
1573nfs4_alloc_stateid(void)
1574{
1575 return kmem_cache_alloc(stateid_slab, GFP_KERNEL);
1576}
1577
b37ad28b 1578static __be32
1da177e4 1579nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp,
567d9829 1580 struct nfs4_delegation *dp,
1da177e4
LT		 1581 struct svc_fh *cur_fh, int flags)
1582{
1583 struct nfs4_stateid *stp;
1da177e4 1584
5ac049ac 1585 stp = nfs4_alloc_stateid();
1da177e4
LT		 1586 if (stp == NULL)
1587 return nfserr_resource;
1588
567d9829
N		 1589 if (dp) {
1590 get_file(dp->dl_vfs_file);
1591 stp->st_vfs_file = dp->dl_vfs_file;
1592 } else {
b37ad28b 1593 __be32 status;
567d9829
N		 1594 status = nfsd_open(rqstp, cur_fh, S_IFREG, flags,
1595 &stp->st_vfs_file);
1596 if (status) {
1597 if (status == nfserr_dropit)
1598 status = nfserr_jukebox;
5ac049ac 1599 kmem_cache_free(stateid_slab, stp);
567d9829
N		 1600 return status;
1601 }
1da177e4 1602 }
1da177e4
LT		 1603 *stpp = stp;
1604 return 0;
1605}
1606
b37ad28b 1607static inline __be32
1da177e4
LT		 1608nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh,
1609 struct nfsd4_open *open)
1610{
1611 struct iattr iattr = {
1612 .ia_valid = ATTR_SIZE,
1613 .ia_size = 0,
1614 };
1615 if (!open->op_truncate)
1616 return 0;
1617 if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
9246585a 1618 return nfserr_inval;
1da177e4
LT		 1619 return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0);
1620}
1621
b37ad28b 1622static __be32
1da177e4
LT		 1623nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open)
1624{
1625 struct file *filp = stp->st_vfs_file;
7eaa36e2 1626 struct inode *inode = filp->f_path.dentry->d_inode;
6c26d08f 1627 unsigned int share_access, new_writer;
b37ad28b 1628 __be32 status;
1da177e4
LT		 1629
1630 set_access(&share_access, stp->st_access_bmap);
6c26d08f
BF		 1631 new_writer = (~share_access) & open->op_share_access
1632 & NFS4_SHARE_ACCESS_WRITE;
1da177e4 1633
6c26d08f 1634 if (new_writer) {
b37ad28b
AV		 1635 int err = get_write_access(inode);
1636 if (err)
1637 return nfserrno(err);
6c26d08f 1638 }
1da177e4
LT		 1639 status = nfsd4_truncate(rqstp, cur_fh, open);
1640 if (status) {
6c26d08f
BF		 1641 if (new_writer)
1642 put_write_access(inode);
1da177e4
LT		 1643 return status;
1644 }
1645 /* remember the open */
6c26d08f 1646 filp->f_mode |= open->op_share_access;
1da177e4
LT		 1647 set_bit(open->op_share_access, &stp->st_access_bmap);
1648 set_bit(open->op_share_deny, &stp->st_deny_bmap);
1649
1650 return nfs_ok;
1651}
1652
1653
1da177e4 1654static void
37515177 1655nfs4_set_claim_prev(struct nfsd4_open *open)
1da177e4 1656{
37515177
N		 1657 open->op_stateowner->so_confirmed = 1;
1658 open->op_stateowner->so_client->cl_firststate = 1;
1da177e4
LT		 1659}
1660
1661/*
1662 * Attempt to hand out a delegation.
1663 */
1664static void
1665nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp)
1666{
1667 struct nfs4_delegation *dp;
1668 struct nfs4_stateowner *sop = stp->st_stateowner;
1669 struct nfs4_callback *cb = &sop->so_client->cl_callback;
1670 struct file_lock fl, *flp = &fl;
1671 int status, flag = 0;
1672
1673 flag = NFS4_OPEN_DELEGATE_NONE;
7b190fec
N		 1674 open->op_recall = 0;
1675 switch (open->op_claim_type) {
1676 case NFS4_OPEN_CLAIM_PREVIOUS:
1677 if (!atomic_read(&cb->cb_set))
1678 open->op_recall = 1;
1679 flag = open->op_delegate_type;
1680 if (flag == NFS4_OPEN_DELEGATE_NONE)
1681 goto out;
1682 break;
1683 case NFS4_OPEN_CLAIM_NULL:
1684 /* Let's not give out any delegations till everyone's
1685 * had the chance to reclaim theirs.... */
1686 if (nfs4_in_grace())
1687 goto out;
1688 if (!atomic_read(&cb->cb_set) || !sop->so_confirmed)
1689 goto out;
1690 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
1691 flag = NFS4_OPEN_DELEGATE_WRITE;
1692 else
1693 flag = NFS4_OPEN_DELEGATE_READ;
1694 break;
1695 default:
1696 goto out;
1697 }
1da177e4
LT		 1698
1699 dp = alloc_init_deleg(sop->so_client, stp, fh, flag);
1700 if (dp == NULL) {
1701 flag = NFS4_OPEN_DELEGATE_NONE;
1702 goto out;
1703 }
1704 locks_init_lock(&fl);
1705 fl.fl_lmops = &nfsd_lease_mng_ops;
1706 fl.fl_flags = FL_LEASE;
1707 fl.fl_end = OFFSET_MAX;
1708 fl.fl_owner = (fl_owner_t)dp;
1709 fl.fl_file = stp->st_vfs_file;
1710 fl.fl_pid = current->tgid;
1711
1712 /* setlease checks to see if delegation should be handed out.
1713 * the lock_manager callbacks fl_mylease and fl_change are used
1714 */
1715 if ((status = setlease(stp->st_vfs_file,
1716 flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK, &flp))) {
1717 dprintk("NFSD: setlease failed [%d], no delegation\n", status);
c907132d 1718 unhash_delegation(dp);
1da177e4
LT		 1719 flag = NFS4_OPEN_DELEGATE_NONE;
1720 goto out;
1721 }
1722
1723 memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid));
1724
1725 dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n",
1726 dp->dl_stateid.si_boot,
1727 dp->dl_stateid.si_stateownerid,
1728 dp->dl_stateid.si_fileid,
1729 dp->dl_stateid.si_generation);
1730out:
7b190fec
N		 1731 if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS
1732 && flag == NFS4_OPEN_DELEGATE_NONE
1733 && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE)
1734 printk("NFSD: WARNING: refusing delegation reclaim\n");
1da177e4
LT		 1735 open->op_delegate_type = flag;
1736}
1737
1738/*
1739 * called with nfs4_lock_state() held.
1740 */
b37ad28b 1741__be32
1da177e4
LT		 1742nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
1743{
1744 struct nfs4_file *fp = NULL;
1745 struct inode *ino = current_fh->fh_dentry->d_inode;
1746 struct nfs4_stateid *stp = NULL;
567d9829 1747 struct nfs4_delegation *dp = NULL;
b37ad28b 1748 __be32 status;
1da177e4
LT		 1749
1750 status = nfserr_inval;
ba5a6a19
BF		 1751 if (!access_valid(open->op_share_access)
1752 || !deny_valid(open->op_share_deny))
1da177e4
LT		 1753 goto out;
1754 /*
1755 * Lookup file; if found, lookup stateid and check open request,
1756 * and check for delegations in the process of being recalled.
1757 * If not found, create the nfs4_file struct
1758 */
1759 fp = find_file(ino);
1760 if (fp) {
1761 if ((status = nfs4_check_open(fp, open, &stp)))
1762 goto out;
c44c5eeb
N		 1763 status = nfs4_check_deleg(fp, open, &dp);
1764 if (status)
1765 goto out;
1da177e4 1766 } else {
c44c5eeb
N		 1767 status = nfserr_bad_stateid;
1768 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR)
1769 goto out;
1da177e4
LT		 1770 status = nfserr_resource;
1771 fp = alloc_init_file(ino);
1772 if (fp == NULL)
1773 goto out;
1774 }
1775
1776 /*
1777 * OPEN the file, or upgrade an existing OPEN.
1778 * If truncate fails, the OPEN fails.
1779 */
1780 if (stp) {
1781 /* Stateid was found, this is an OPEN upgrade */
1782 status = nfs4_upgrade_open(rqstp, current_fh, stp, open);
1783 if (status)
1784 goto out;
444c2c07 1785 update_stateid(&stp->st_stateid);
1da177e4
LT		 1786 } else {
1787 /* Stateid was not found, this is a new OPEN */
1788 int flags = 0;
9ecb6a08
BF		 1789 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
1790 flags |= MAY_READ;
1da177e4 1791 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
9ecb6a08 1792 flags |= MAY_WRITE;
567d9829
N		 1793 status = nfs4_new_open(rqstp, &stp, dp, current_fh, flags);
1794 if (status)
1da177e4
LT		 1795 goto out;
1796 init_stateid(stp, fp, open);
1797 status = nfsd4_truncate(rqstp, current_fh, open);
1798 if (status) {
1799 release_stateid(stp, OPEN_STATE);
1800 goto out;
1801 }
1802 }
1803 memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t));
1804
1805 /*
1806 * Attempt to hand out a delegation. No error return, because the
1807 * OPEN succeeds even if we fail.
1808 */
1809 nfs4_open_delegation(current_fh, open, stp);
1810
1811 status = nfs_ok;
1812
1813 dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n",
1814 stp->st_stateid.si_boot, stp->st_stateid.si_stateownerid,
1815 stp->st_stateid.si_fileid, stp->st_stateid.si_generation);
1816out:
13cd2184
N		 1817 if (fp)
1818 put_nfs4_file(fp);
37515177
N		 1819 if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
1820 nfs4_set_claim_prev(open);
1da177e4
LT		 1821 /*
1822 * To finish the open response, we just need to set the rflags.
1823 */
1824 open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX;
1825 if (!open->op_stateowner->so_confirmed)
1826 open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM;
1827
1828 return status;
1829}
1830
58da282b 1831static struct workqueue_struct *laundry_wq;
c4028958
DH		 1832static void laundromat_main(struct work_struct *);
1833static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main);
1da177e4 1834
b37ad28b 1835__be32
b591480b
BF		 1836nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1837 clientid_t *clid)
1da177e4
LT		 1838{
1839 struct nfs4_client *clp;
b37ad28b 1840 __be32 status;
1da177e4
LT		 1841
1842 nfs4_lock_state();
1843 dprintk("process_renew(%08x/%08x): starting\n",
1844 clid->cl_boot, clid->cl_id);
1845 status = nfserr_stale_clientid;
1846 if (STALE_CLIENTID(clid))
1847 goto out;
1848 clp = find_confirmed_client(clid);
1849 status = nfserr_expired;
1850 if (clp == NULL) {
1851 /* We assume the client took too long to RENEW. */
1852 dprintk("nfsd4_renew: clientid not found!\n");
1853 goto out;
1854 }
1855 renew_client(clp);
1856 status = nfserr_cb_path_down;
ea1da636 1857 if (!list_empty(&clp->cl_delegations)
1da177e4
LT		 1858 && !atomic_read(&clp->cl_callback.cb_set))
1859 goto out;
1860 status = nfs_ok;
1861out:
1862 nfs4_unlock_state();
1863 return status;
1864}
1865
a76b4319
N		 1866static void
1867end_grace(void)
1868{
1869 dprintk("NFSD: end of grace period\n");
c7b9a459 1870 nfsd4_recdir_purge_old();
a76b4319
N		 1871 in_grace = 0;
1872}
1873
fd39ca9a 1874static time_t
1da177e4
LT		 1875nfs4_laundromat(void)
1876{
1877 struct nfs4_client *clp;
1878 struct nfs4_stateowner *sop;
1879 struct nfs4_delegation *dp;
1880 struct list_head *pos, *next, reaplist;
1881 time_t cutoff = get_seconds() - NFSD_LEASE_TIME;
1882 time_t t, clientid_val = NFSD_LEASE_TIME;
1883 time_t u, test_val = NFSD_LEASE_TIME;
1884
1885 nfs4_lock_state();
1886
1887 dprintk("NFSD: laundromat service - starting\n");
a76b4319
N		 1888 if (in_grace)
1889 end_grace();
1da177e4
LT		 1890 list_for_each_safe(pos, next, &client_lru) {
1891 clp = list_entry(pos, struct nfs4_client, cl_lru);
1892 if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) {
1893 t = clp->cl_time - cutoff;
1894 if (clientid_val > t)
1895 clientid_val = t;
1896 break;
1897 }
1898 dprintk("NFSD: purging unused client (clientid %08x)\n",
1899 clp->cl_clientid.cl_id);
c7b9a459 1900 nfsd4_remove_clid_dir(clp);
1da177e4
LT		 1901 expire_client(clp);
1902 }
1903 INIT_LIST_HEAD(&reaplist);
1904 spin_lock(&recall_lock);
1905 list_for_each_safe(pos, next, &del_recall_lru) {
1906 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
1907 if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) {
1908 u = dp->dl_time - cutoff;
1909 if (test_val > u)
1910 test_val = u;
1911 break;
1912 }
1913 dprintk("NFSD: purging unused delegation dp %p, fp %p\n",
1914 dp, dp->dl_flock);
1915 list_move(&dp->dl_recall_lru, &reaplist);
1916 }
1917 spin_unlock(&recall_lock);
1918 list_for_each_safe(pos, next, &reaplist) {
1919 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
1920 list_del_init(&dp->dl_recall_lru);
1921 unhash_delegation(dp);
1922 }
1923 test_val = NFSD_LEASE_TIME;
1924 list_for_each_safe(pos, next, &close_lru) {
1925 sop = list_entry(pos, struct nfs4_stateowner, so_close_lru);
1926 if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) {
1927 u = sop->so_time - cutoff;
1928 if (test_val > u)
1929 test_val = u;
1930 break;
1931 }
1932 dprintk("NFSD: purging unused open stateowner (so_id %d)\n",
1933 sop->so_id);
358dd55a 1934 release_stateowner(sop);
1da177e4
LT		 1935 }
1936 if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT)
1937 clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT;
1938 nfs4_unlock_state();
1939 return clientid_val;
1940}
1941
1942void
c4028958 1943laundromat_main(struct work_struct *not_used)
1da177e4
LT		 1944{
1945 time_t t;
1946
1947 t = nfs4_laundromat();
1948 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t);
58da282b 1949 queue_delayed_work(laundry_wq, &laundromat_work, t*HZ);
1da177e4
LT		 1950}
1951
fd39ca9a 1952static struct nfs4_stateowner *
f8816512
N		 1953search_close_lru(u32 st_id, int flags)
1954{
1da177e4
LT		 1955 struct nfs4_stateowner *local = NULL;
1956
1da177e4
LT		 1957 if (flags & CLOSE_STATE) {
1958 list_for_each_entry(local, &close_lru, so_close_lru) {
1959 if (local->so_id == st_id)
1960 return local;
1961 }
1962 }
1963 return NULL;
1964}
1965
1966static inline int
1967nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp)
1968{
7eaa36e2 1969 return fhp->fh_dentry->d_inode != stp->st_vfs_file->f_path.dentry->d_inode;
1da177e4
LT		 1970}
1971
1972static int
1973STALE_STATEID(stateid_t *stateid)
1974{
1975 if (stateid->si_boot == boot_time)
1976 return 0;
849823c5 1977 dprintk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n",
1da177e4
LT		 1978 stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid,
1979 stateid->si_generation);
1980 return 1;
1981}
1982
1983static inline int
1984access_permit_read(unsigned long access_bmap)
1985{
1986 return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) ||
1987 test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) ||
1988 test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap);
1989}
1990
1991static inline int
1992access_permit_write(unsigned long access_bmap)
1993{
1994 return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) ||
1995 test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap);
1996}
1997
1998static
b37ad28b 1999__be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags)
1da177e4 2000{
b37ad28b 2001 __be32 status = nfserr_openmode;
1da177e4
LT		 2002
2003 if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap)))
2004 goto out;
2005 if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap)))
2006 goto out;
2007 status = nfs_ok;
2008out:
2009 return status;
2010}
2011
b37ad28b 2012static inline __be32
1da177e4
LT		 2013check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags)
2014{
2015 /* Trying to call delegreturn with a special stateid? Yuch: */
2016 if (!(flags & (RD_STATE | WR_STATE)))
2017 return nfserr_bad_stateid;
2018 else if (ONE_STATEID(stateid) && (flags & RD_STATE))
2019 return nfs_ok;
2020 else if (nfs4_in_grace()) {
2021 /* Answer in remaining cases depends on existance of
2022 * conflicting state; so we must wait out the grace period. */
2023 return nfserr_grace;
2024 } else if (flags & WR_STATE)
2025 return nfs4_share_conflict(current_fh,
2026 NFS4_SHARE_DENY_WRITE);
2027 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
2028 return nfs4_share_conflict(current_fh,
2029 NFS4_SHARE_DENY_READ);
2030}
2031
2032/*
2033 * Allow READ/WRITE during grace period on recovered state only for files
2034 * that are not able to provide mandatory locking.
2035 */
2036static inline int
2037io_during_grace_disallowed(struct inode *inode, int flags)
2038{
2039 return nfs4_in_grace() && (flags & (RD_STATE | WR_STATE))
2040 && MANDATORY_LOCK(inode);
2041}
2042
2043/*
2044* Checks for stateid operations
2045*/
b37ad28b 2046__be32
1da177e4
LT		 2047nfs4_preprocess_stateid_op(struct svc_fh *current_fh, stateid_t *stateid, int flags, struct file **filpp)
2048{
2049 struct nfs4_stateid *stp = NULL;
2050 struct nfs4_delegation *dp = NULL;
2051 stateid_t *stidp;
2052 struct inode *ino = current_fh->fh_dentry->d_inode;
b37ad28b 2053 __be32 status;
1da177e4
LT		 2054
2055 dprintk("NFSD: preprocess_stateid_op: stateid = (%08x/%08x/%08x/%08x)\n",
2056 stateid->si_boot, stateid->si_stateownerid,
2057 stateid->si_fileid, stateid->si_generation);
2058 if (filpp)
2059 *filpp = NULL;
2060
2061 if (io_during_grace_disallowed(ino, flags))
2062 return nfserr_grace;
2063
2064 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid))
2065 return check_special_stateids(current_fh, stateid, flags);
2066
2067 /* STALE STATEID */
2068 status = nfserr_stale_stateid;
2069 if (STALE_STATEID(stateid))
2070 goto out;
2071
2072 /* BAD STATEID */
2073 status = nfserr_bad_stateid;
2074 if (!stateid->si_fileid) { /* delegation stateid */
2075 if(!(dp = find_delegation_stateid(ino, stateid))) {
2076 dprintk("NFSD: delegation stateid not found\n");
1da177e4
LT		 2077 goto out;
2078 }
2079 stidp = &dp->dl_stateid;
2080 } else { /* open or lock stateid */
2081 if (!(stp = find_stateid(stateid, flags))) {
2082 dprintk("NFSD: open or lock stateid not found\n");
1da177e4
LT		 2083 goto out;
2084 }
2085 if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp))
2086 goto out;
2087 if (!stp->st_stateowner->so_confirmed)
2088 goto out;
2089 stidp = &stp->st_stateid;
2090 }
2091 if (stateid->si_generation > stidp->si_generation)
2092 goto out;
2093
2094 /* OLD STATEID */
2095 status = nfserr_old_stateid;
2096 if (stateid->si_generation < stidp->si_generation)
2097 goto out;
2098 if (stp) {
2099 if ((status = nfs4_check_openmode(stp,flags)))
2100 goto out;
2101 renew_client(stp->st_stateowner->so_client);
2102 if (filpp)
2103 *filpp = stp->st_vfs_file;
2104 } else if (dp) {
2105 if ((status = nfs4_check_delegmode(dp, flags)))
2106 goto out;
2107 renew_client(dp->dl_client);
2108 if (flags & DELEG_RET)
2109 unhash_delegation(dp);
2110 if (filpp)
2111 *filpp = dp->dl_vfs_file;
2112 }
2113 status = nfs_ok;
2114out:
2115 return status;
2116}
2117
4c4cd222
N		 2118static inline int
2119setlkflg (int type)
2120{
2121 return (type == NFS4_READW_LT || type == NFS4_READ_LT) ?
2122 RD_STATE : WR_STATE;
2123}
1da177e4
LT		 2124
2125/*
2126 * Checks for sequence id mutating operations.
2127 */
b37ad28b 2128static __be32
4c4cd222 2129nfs4_preprocess_seqid_op(struct svc_fh *current_fh, u32 seqid, stateid_t *stateid, int flags, struct nfs4_stateowner **sopp, struct nfs4_stateid **stpp, struct nfsd4_lock *lock)
1da177e4 2130{
1da177e4
LT		 2131 struct nfs4_stateid *stp;
2132 struct nfs4_stateowner *sop;
2133
2134 dprintk("NFSD: preprocess_seqid_op: seqid=%d "
2135 "stateid = (%08x/%08x/%08x/%08x)\n", seqid,
2136 stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid,
2137 stateid->si_generation);
3a4f98bb 2138
1da177e4
LT		 2139 *stpp = NULL;
2140 *sopp = NULL;
2141
1da177e4
LT		 2142 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) {
2143 printk("NFSD: preprocess_seqid_op: magic stateid!\n");
3a4f98bb 2144 return nfserr_bad_stateid;
1da177e4
LT		 2145 }
2146
1da177e4 2147 if (STALE_STATEID(stateid))
3a4f98bb 2148 return nfserr_stale_stateid;
1da177e4
LT		 2149 /*
2150 * We return BAD_STATEID if filehandle doesn't match stateid,
2151 * the confirmed flag is incorrecly set, or the generation
2152 * number is incorrect.
1da177e4 2153 */
f8816512
N		 2154 stp = find_stateid(stateid, flags);
2155 if (stp == NULL) {
2156 /*
2157 * Also, we should make sure this isn't just the result of
2158 * a replayed close:
2159 */
2160 sop = search_close_lru(stateid->si_stateownerid, flags);
2161 if (sop == NULL)
2162 return nfserr_bad_stateid;
2163 *sopp = sop;
2164 goto check_replay;
2165 }
1da177e4 2166
4c4cd222 2167 if (lock) {
1da177e4 2168 struct nfs4_stateowner *sop = stp->st_stateowner;
4c4cd222 2169 clientid_t *lockclid = &lock->v.new.clientid;
1da177e4 2170 struct nfs4_client *clp = sop->so_client;
4c4cd222 2171 int lkflg = 0;
b37ad28b 2172 __be32 status;
4c4cd222
N		 2173
2174 lkflg = setlkflg(lock->lk_type);
2175
2176 if (lock->lk_is_new) {
2177 if (!sop->so_is_open_owner)
2178 return nfserr_bad_stateid;
2179 if (!cmp_clid(&clp->cl_clientid, lockclid))
2180 return nfserr_bad_stateid;
2181 /* stp is the open stateid */
2182 status = nfs4_check_openmode(stp, lkflg);
2183 if (status)
2184 return status;
2185 } else {
2186 /* stp is the lock stateid */
2187 status = nfs4_check_openmode(stp->st_openstp, lkflg);
2188 if (status)
2189 return status;
2190 }
1da177e4 2191
1da177e4
LT		 2192 }
2193
2194 if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp)) {
2195 printk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n");
3a4f98bb 2196 return nfserr_bad_stateid;
1da177e4
LT		 2197 }
2198
2199 *stpp = stp;
2200 *sopp = sop = stp->st_stateowner;
2201
2202 /*
2203 * We now validate the seqid and stateid generation numbers.
2204 * For the moment, we ignore the possibility of
2205 * generation number wraparound.
2206 */
bd9aac52 2207 if (seqid != sop->so_seqid)
1da177e4
LT		 2208 goto check_replay;
2209
3a4f98bb
N		 2210 if (sop->so_confirmed && flags & CONFIRM) {
2211 printk("NFSD: preprocess_seqid_op: expected"
2212 " unconfirmed stateowner!\n");
2213 return nfserr_bad_stateid;
1da177e4 2214 }
3a4f98bb
N		 2215 if (!sop->so_confirmed && !(flags & CONFIRM)) {
2216 printk("NFSD: preprocess_seqid_op: stateowner not"
2217 " confirmed yet!\n");
2218 return nfserr_bad_stateid;
1da177e4
LT		 2219 }
2220 if (stateid->si_generation > stp->st_stateid.si_generation) {
2221 printk("NFSD: preprocess_seqid_op: future stateid?!\n");
3a4f98bb 2222 return nfserr_bad_stateid;
1da177e4
LT		 2223 }
2224
1da177e4
LT		 2225 if (stateid->si_generation < stp->st_stateid.si_generation) {
2226 printk("NFSD: preprocess_seqid_op: old stateid!\n");
3a4f98bb 2227 return nfserr_old_stateid;
1da177e4 2228 }
52fd004e 2229 renew_client(sop->so_client);
3a4f98bb 2230 return nfs_ok;
1da177e4 2231
1da177e4 2232check_replay:
bd9aac52 2233 if (seqid == sop->so_seqid - 1) {
849823c5 2234 dprintk("NFSD: preprocess_seqid_op: retransmission?\n");
1da177e4 2235 /* indicate replay to calling function */
a90b061c 2236 return nfserr_replay_me;
1da177e4 2237 }
3a4f98bb
N		 2238 printk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n",
2239 sop->so_seqid, seqid);
2240 *sopp = NULL;
2241 return nfserr_bad_seqid;
1da177e4
LT		 2242}
2243
b37ad28b 2244__be32
ca364317 2245nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
a4f1706a 2246 struct nfsd4_open_confirm *oc)
1da177e4 2247{
b37ad28b 2248 __be32 status;
1da177e4
LT		 2249 struct nfs4_stateowner *sop;
2250 struct nfs4_stateid *stp;
2251
2252 dprintk("NFSD: nfsd4_open_confirm on file %.*s\n",
ca364317
BF		 2253 (int)cstate->current_fh.fh_dentry->d_name.len,
2254 cstate->current_fh.fh_dentry->d_name.name);
1da177e4 2255
ca364317 2256 status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0);
a8cddc5d
BF		 2257 if (status)
2258 return status;
1da177e4
LT		 2259
2260 nfs4_lock_state();
2261
ca364317
BF		 2262 if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh,
2263 oc->oc_seqid, &oc->oc_req_stateid,
1da177e4
LT		 2264 CHECK_FH | CONFIRM | OPEN_STATE,
2265 &oc->oc_stateowner, &stp, NULL)))
2266 goto out;
2267
2268 sop = oc->oc_stateowner;
2269 sop->so_confirmed = 1;
2270 update_stateid(&stp->st_stateid);
2271 memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t));
2272 dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d "
2273 "stateid=(%08x/%08x/%08x/%08x)\n", oc->oc_seqid,
2274 stp->st_stateid.si_boot,
2275 stp->st_stateid.si_stateownerid,
2276 stp->st_stateid.si_fileid,
2277 stp->st_stateid.si_generation);
c7b9a459
N		 2278
2279 nfsd4_create_clid_dir(sop->so_client);
1da177e4 2280out:
f2327d9a 2281 if (oc->oc_stateowner) {
1da177e4 2282 nfs4_get_stateowner(oc->oc_stateowner);
a4f1706a 2283 cstate->replay_owner = oc->oc_stateowner;
f2327d9a 2284 }
1da177e4
LT		 2285 nfs4_unlock_state();
2286 return status;
2287}
2288
2289
2290/*
2291 * unset all bits in union bitmap (bmap) that
2292 * do not exist in share (from successful OPEN_DOWNGRADE)
2293 */
2294static void
2295reset_union_bmap_access(unsigned long access, unsigned long *bmap)
2296{
2297 int i;
2298 for (i = 1; i < 4; i++) {
2299 if ((i & access) != i)
2300 __clear_bit(i, bmap);
2301 }
2302}
2303
2304static void
2305reset_union_bmap_deny(unsigned long deny, unsigned long *bmap)
2306{
2307 int i;
2308 for (i = 0; i < 4; i++) {
2309 if ((i & deny) != i)
2310 __clear_bit(i, bmap);
2311 }
2312}
2313
b37ad28b 2314__be32
ca364317
BF		 2315nfsd4_open_downgrade(struct svc_rqst *rqstp,
2316 struct nfsd4_compound_state *cstate,
a4f1706a 2317 struct nfsd4_open_downgrade *od)
1da177e4 2318{
b37ad28b 2319 __be32 status;
1da177e4
LT		 2320 struct nfs4_stateid *stp;
2321 unsigned int share_access;
2322
2323 dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n",
ca364317
BF		 2324 (int)cstate->current_fh.fh_dentry->d_name.len,
2325 cstate->current_fh.fh_dentry->d_name.name);
1da177e4 2326
ba5a6a19
BF		 2327 if (!access_valid(od->od_share_access)
2328 || !deny_valid(od->od_share_deny))
1da177e4
LT		 2329 return nfserr_inval;
2330
2331 nfs4_lock_state();
ca364317
BF		 2332 if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh,
2333 od->od_seqid,
1da177e4
LT		 2334 &od->od_stateid,
2335 CHECK_FH | OPEN_STATE,
2336 &od->od_stateowner, &stp, NULL)))
2337 goto out;
2338
2339 status = nfserr_inval;
2340 if (!test_bit(od->od_share_access, &stp->st_access_bmap)) {
2341 dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n",
2342 stp->st_access_bmap, od->od_share_access);
2343 goto out;
2344 }
2345 if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) {
2346 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
2347 stp->st_deny_bmap, od->od_share_deny);
2348 goto out;
2349 }
2350 set_access(&share_access, stp->st_access_bmap);
2351 nfs4_file_downgrade(stp->st_vfs_file,
2352 share_access & ~od->od_share_access);
2353
2354 reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap);
2355 reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap);
2356
2357 update_stateid(&stp->st_stateid);
2358 memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t));
2359 status = nfs_ok;
2360out:
f2327d9a 2361 if (od->od_stateowner) {
1da177e4 2362 nfs4_get_stateowner(od->od_stateowner);
a4f1706a 2363 cstate->replay_owner = od->od_stateowner;
f2327d9a 2364 }
1da177e4
LT		 2365 nfs4_unlock_state();
2366 return status;
2367}
2368
2369/*
2370 * nfs4_unlock_state() called after encode
2371 */
b37ad28b 2372__be32
ca364317 2373nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
a4f1706a 2374 struct nfsd4_close *close)
1da177e4 2375{
b37ad28b 2376 __be32 status;
1da177e4
LT		 2377 struct nfs4_stateid *stp;
2378
2379 dprintk("NFSD: nfsd4_close on file %.*s\n",
ca364317
BF		 2380 (int)cstate->current_fh.fh_dentry->d_name.len,
2381 cstate->current_fh.fh_dentry->d_name.name);
1da177e4
LT		 2382
2383 nfs4_lock_state();
2384 /* check close_lru for replay */
ca364317
BF		 2385 if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh,
2386 close->cl_seqid,
1da177e4
LT		 2387 &close->cl_stateid,
2388 CHECK_FH | OPEN_STATE | CLOSE_STATE,
2389 &close->cl_stateowner, &stp, NULL)))
2390 goto out;
1da177e4
LT		 2391 status = nfs_ok;
2392 update_stateid(&stp->st_stateid);
2393 memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t));
2394
04ef5954
BF		 2395 /* release_stateid() calls nfsd_close() if needed */
2396 release_stateid(stp, OPEN_STATE);
2397
2398 /* place unused nfs4_stateowners on so_close_lru list to be
2399 * released by the laundromat service after the lease period
2400 * to enable us to handle CLOSE replay
2401 */
2402 if (list_empty(&close->cl_stateowner->so_stateids))
2403 move_to_close_lru(close->cl_stateowner);
1da177e4 2404out:
f2327d9a 2405 if (close->cl_stateowner) {
1da177e4 2406 nfs4_get_stateowner(close->cl_stateowner);
a4f1706a 2407 cstate->replay_owner = close->cl_stateowner;
f2327d9a 2408 }
1da177e4
LT		 2409 nfs4_unlock_state();
2410 return status;
2411}
2412
b37ad28b 2413__be32
ca364317
BF		 2414nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2415 struct nfsd4_delegreturn *dr)
1da177e4 2416{
b37ad28b 2417 __be32 status;
1da177e4 2418
ca364317 2419 if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0)))
1da177e4
LT		 2420 goto out;
2421
2422 nfs4_lock_state();
ca364317
BF		 2423 status = nfs4_preprocess_stateid_op(&cstate->current_fh,
2424 &dr->dr_stateid, DELEG_RET, NULL);
1da177e4
LT		 2425 nfs4_unlock_state();
2426out:
2427 return status;
2428}
2429
2430
2431/*
2432 * Lock owner state (byte-range locks)
2433 */
2434#define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
2435#define LOCK_HASH_BITS 8
2436#define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS)
2437#define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1)
2438
2439#define lockownerid_hashval(id) \
2440 ((id) & LOCK_HASH_MASK)
2441
2442static inline unsigned int
2443lock_ownerstr_hashval(struct inode *inode, u32 cl_id,
2444 struct xdr_netobj *ownername)
2445{
2446 return (file_hashval(inode) + cl_id
2447 + opaque_hashval(ownername->data, ownername->len))
2448 & LOCK_HASH_MASK;
2449}
2450
2451static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE];
2452static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE];
2453static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE];
2454
fd39ca9a 2455static struct nfs4_stateid *
1da177e4
LT		 2456find_stateid(stateid_t *stid, int flags)
2457{
2458 struct nfs4_stateid *local = NULL;
2459 u32 st_id = stid->si_stateownerid;
2460 u32 f_id = stid->si_fileid;
2461 unsigned int hashval;
2462
2463 dprintk("NFSD: find_stateid flags 0x%x\n",flags);
2464 if ((flags & LOCK_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) {
2465 hashval = stateid_hashval(st_id, f_id);
2466 list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) {
2467 if ((local->st_stateid.si_stateownerid == st_id) &&
2468 (local->st_stateid.si_fileid == f_id))
2469 return local;
2470 }
2471 }
2472 if ((flags & OPEN_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) {
2473 hashval = stateid_hashval(st_id, f_id);
2474 list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) {
2475 if ((local->st_stateid.si_stateownerid == st_id) &&
2476 (local->st_stateid.si_fileid == f_id))
2477 return local;
2478 }
849823c5 2479 }
1da177e4
LT		 2480 return NULL;
2481}
2482
2483static struct nfs4_delegation *
2484find_delegation_stateid(struct inode *ino, stateid_t *stid)
2485{
13cd2184
N		 2486 struct nfs4_file *fp;
2487 struct nfs4_delegation *dl;
1da177e4
LT		 2488
2489 dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n",
2490 stid->si_boot, stid->si_stateownerid,
2491 stid->si_fileid, stid->si_generation);
2492
1da177e4 2493 fp = find_file(ino);
13cd2184
N		 2494 if (!fp)
2495 return NULL;
2496 dl = find_delegation_file(fp, stid);
2497 put_nfs4_file(fp);
2498 return dl;
1da177e4
LT		 2499}
2500
2501/*
2502 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
2503 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
2504 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
2505 * locking, this prevents us from being completely protocol-compliant. The
2506 * real solution to this problem is to start using unsigned file offsets in
2507 * the VFS, but this is a very deep change!
2508 */
2509static inline void
2510nfs4_transform_lock_offset(struct file_lock *lock)
2511{
2512 if (lock->fl_start < 0)
2513 lock->fl_start = OFFSET_MAX;
2514 if (lock->fl_end < 0)
2515 lock->fl_end = OFFSET_MAX;
2516}
2517
d5b9026a
N		 2518/* Hack!: For now, we're defining this just so we can use a pointer to it
2519 * as a unique cookie to identify our (NFSv4's) posix locks. */
e465a77f 2520static struct lock_manager_operations nfsd_posix_mng_ops = {
d5b9026a 2521};
1da177e4
LT		 2522
2523static inline void
2524nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny)
2525{
d5b9026a
N		 2526 struct nfs4_stateowner *sop;
2527 unsigned int hval;
1da177e4 2528
d5b9026a
N		 2529 if (fl->fl_lmops == &nfsd_posix_mng_ops) {
2530 sop = (struct nfs4_stateowner *) fl->fl_owner;
2531 hval = lockownerid_hashval(sop->so_id);
1da177e4
LT		 2532 kref_get(&sop->so_ref);
2533 deny->ld_sop = sop;
2534 deny->ld_clientid = sop->so_client->cl_clientid;
d5b9026a
N		 2535 } else {
2536 deny->ld_sop = NULL;
2537 deny->ld_clientid.cl_boot = 0;
2538 deny->ld_clientid.cl_id = 0;
1da177e4
LT		 2539 }
2540 deny->ld_start = fl->fl_start;
2541 deny->ld_length = ~(u64)0;
2542 if (fl->fl_end != ~(u64)0)
2543 deny->ld_length = fl->fl_end - fl->fl_start + 1;
2544 deny->ld_type = NFS4_READ_LT;
2545 if (fl->fl_type != F_RDLCK)
2546 deny->ld_type = NFS4_WRITE_LT;
2547}
2548
1da177e4
LT		 2549static struct nfs4_stateowner *
2550find_lockstateowner_str(struct inode *inode, clientid_t *clid,
2551 struct xdr_netobj *owner)
2552{
2553 unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner);
2554 struct nfs4_stateowner *op;
2555
2556 list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) {
2557 if (cmp_owner_str(op, owner, clid))
2558 return op;
2559 }
2560 return NULL;
2561}
2562
2563/*
2564 * Alloc a lock owner structure.
2565 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
2566 * occured.
2567 *
2568 * strhashval = lock_ownerstr_hashval
1da177e4
LT		 2569 */
2570
2571static struct nfs4_stateowner *
2572alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) {
2573 struct nfs4_stateowner *sop;
2574 struct nfs4_replay *rp;
2575 unsigned int idhashval;
2576
2577 if (!(sop = alloc_stateowner(&lock->lk_new_owner)))
2578 return NULL;
2579 idhashval = lockownerid_hashval(current_ownerid);
2580 INIT_LIST_HEAD(&sop->so_idhash);
2581 INIT_LIST_HEAD(&sop->so_strhash);
2582 INIT_LIST_HEAD(&sop->so_perclient);
ea1da636
N		 2583 INIT_LIST_HEAD(&sop->so_stateids);
2584 INIT_LIST_HEAD(&sop->so_perstateid);
1da177e4
LT		 2585 INIT_LIST_HEAD(&sop->so_close_lru); /* not used */
2586 sop->so_time = 0;
2587 list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]);
2588 list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]);
ea1da636 2589 list_add(&sop->so_perstateid, &open_stp->st_lockowners);
1da177e4
LT		 2590 sop->so_is_open_owner = 0;
2591 sop->so_id = current_ownerid++;
2592 sop->so_client = clp;
b59e3c0e
NB		 2593 /* It is the openowner seqid that will be incremented in encode in the
2594 * case of new lockowners; so increment the lock seqid manually: */
2595 sop->so_seqid = lock->lk_new_lock_seqid + 1;
1da177e4
LT		 2596 sop->so_confirmed = 1;
2597 rp = &sop->so_replay;
de1ae286 2598 rp->rp_status = nfserr_serverfault;
1da177e4
LT		 2599 rp->rp_buflen = 0;
2600 rp->rp_buf = rp->rp_ibuf;
2601 return sop;
2602}
2603
fd39ca9a 2604static struct nfs4_stateid *
1da177e4
LT		 2605alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp)
2606{
2607 struct nfs4_stateid *stp;
2608 unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id);
2609
5ac049ac
N		 2610 stp = nfs4_alloc_stateid();
2611 if (stp == NULL)
1da177e4
LT		 2612 goto out;
2613 INIT_LIST_HEAD(&stp->st_hash);
2614 INIT_LIST_HEAD(&stp->st_perfile);
ea1da636
N		 2615 INIT_LIST_HEAD(&stp->st_perstateowner);
2616 INIT_LIST_HEAD(&stp->st_lockowners); /* not used */
1da177e4 2617 list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]);
8beefa24 2618 list_add(&stp->st_perfile, &fp->fi_stateids);
ea1da636 2619 list_add(&stp->st_perstateowner, &sop->so_stateids);
1da177e4 2620 stp->st_stateowner = sop;
13cd2184 2621 get_nfs4_file(fp);
1da177e4
LT		 2622 stp->st_file = fp;
2623 stp->st_stateid.si_boot = boot_time;
2624 stp->st_stateid.si_stateownerid = sop->so_id;
2625 stp->st_stateid.si_fileid = fp->fi_id;
2626 stp->st_stateid.si_generation = 0;
2627 stp->st_vfs_file = open_stp->st_vfs_file; /* FIXME refcount?? */
2628 stp->st_access_bmap = open_stp->st_access_bmap;
2629 stp->st_deny_bmap = open_stp->st_deny_bmap;
4c4cd222 2630 stp->st_openstp = open_stp;
1da177e4
LT		 2631
2632out:
2633 return stp;
2634}
2635
fd39ca9a 2636static int
1da177e4
LT		 2637check_lock_length(u64 offset, u64 length)
2638{
2639 return ((length == 0) || ((length != ~(u64)0) &&
2640 LOFF_OVERFLOW(offset, length)));
2641}
2642
2643/*
2644 * LOCK operation
2645 */
b37ad28b 2646__be32
ca364317 2647nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
a4f1706a 2648 struct nfsd4_lock *lock)
1da177e4 2649{
3e9e3dbe 2650 struct nfs4_stateowner *open_sop = NULL;
b59e3c0e 2651 struct nfs4_stateowner *lock_sop = NULL;
1da177e4
LT		 2652 struct nfs4_stateid *lock_stp;
2653 struct file *filp;
2654 struct file_lock file_lock;
8dc7c311 2655 struct file_lock conflock;
b37ad28b 2656 __be32 status = 0;
1da177e4 2657 unsigned int strhashval;
150b3934 2658 unsigned int cmd;
b8dd7b9a 2659 int err;
1da177e4
LT		 2660
2661 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
2662 (long long) lock->lk_offset,
2663 (long long) lock->lk_length);
2664
1da177e4
LT		 2665 if (check_lock_length(lock->lk_offset, lock->lk_length))
2666 return nfserr_inval;
2667
ca364317
BF		 2668 if ((status = fh_verify(rqstp, &cstate->current_fh,
2669 S_IFREG, MAY_LOCK))) {
a6f6ef2f
AA		 2670 dprintk("NFSD: nfsd4_lock: permission denied!\n");
2671 return status;
2672 }
2673
1da177e4
LT		 2674 nfs4_lock_state();
2675
2676 if (lock->lk_is_new) {
893f8770
N		 2677 /*
2678 * Client indicates that this is a new lockowner.
2679 * Use open owner and open stateid to create lock owner and
2680 * lock stateid.
2681 */
1da177e4
LT		 2682 struct nfs4_stateid *open_stp = NULL;
2683 struct nfs4_file *fp;
2684
2685 status = nfserr_stale_clientid;
849823c5 2686 if (STALE_CLIENTID(&lock->lk_new_clientid))
1da177e4 2687 goto out;
1da177e4 2688
1da177e4 2689 /* validate and update open stateid and open seqid */
ca364317 2690 status = nfs4_preprocess_seqid_op(&cstate->current_fh,
1da177e4
LT		 2691 lock->lk_new_open_seqid,
2692 &lock->lk_new_open_stateid,
2693 CHECK_FH | OPEN_STATE,
3a65588a 2694 &lock->lk_replay_owner, &open_stp,
b59e3c0e 2695 lock);
37515177 2696 if (status)
1da177e4 2697 goto out;
3a65588a 2698 open_sop = lock->lk_replay_owner;
1da177e4
LT		 2699 /* create lockowner and lock stateid */
2700 fp = open_stp->st_file;
2701 strhashval = lock_ownerstr_hashval(fp->fi_inode,
2702 open_sop->so_client->cl_clientid.cl_id,
2703 &lock->v.new.owner);
3e9e3dbe
N		 2704 /* XXX: Do we need to check for duplicate stateowners on
2705 * the same file, or should they just be allowed (and
2706 * create new stateids)? */
1da177e4 2707 status = nfserr_resource;
b59e3c0e
NB		 2708 lock_sop = alloc_init_lock_stateowner(strhashval,
2709 open_sop->so_client, open_stp, lock);
2710 if (lock_sop == NULL)
1da177e4 2711 goto out;
b59e3c0e 2712 lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp);
8a280510 2713 if (lock_stp == NULL)
1da177e4 2714 goto out;
1da177e4
LT		 2715 } else {
2716 /* lock (lock owner + lock stateid) already exists */
ca364317 2717 status = nfs4_preprocess_seqid_op(&cstate->current_fh,
1da177e4
LT		 2718 lock->lk_old_lock_seqid,
2719 &lock->lk_old_lock_stateid,
2720 CHECK_FH | LOCK_STATE,
3a65588a 2721 &lock->lk_replay_owner, &lock_stp, lock);
1da177e4
LT		 2722 if (status)
2723 goto out;
3a65588a 2724 lock_sop = lock->lk_replay_owner;
1da177e4 2725 }
3a65588a 2726 /* lock->lk_replay_owner and lock_stp have been created or found */
1da177e4
LT		 2727 filp = lock_stp->st_vfs_file;
2728
0dd395dc
N		 2729 status = nfserr_grace;
2730 if (nfs4_in_grace() && !lock->lk_reclaim)
2731 goto out;
2732 status = nfserr_no_grace;
2733 if (!nfs4_in_grace() && lock->lk_reclaim)
2734 goto out;
2735
1da177e4
LT		 2736 locks_init_lock(&file_lock);
2737 switch (lock->lk_type) {
2738 case NFS4_READ_LT:
2739 case NFS4_READW_LT:
2740 file_lock.fl_type = F_RDLCK;
150b3934 2741 cmd = F_SETLK;
1da177e4
LT		 2742 break;
2743 case NFS4_WRITE_LT:
2744 case NFS4_WRITEW_LT:
2745 file_lock.fl_type = F_WRLCK;
150b3934 2746 cmd = F_SETLK;
1da177e4
LT		 2747 break;
2748 default:
2749 status = nfserr_inval;
2750 goto out;
2751 }
b59e3c0e 2752 file_lock.fl_owner = (fl_owner_t)lock_sop;
1da177e4
LT		 2753 file_lock.fl_pid = current->tgid;
2754 file_lock.fl_file = filp;
2755 file_lock.fl_flags = FL_POSIX;
d5b9026a 2756 file_lock.fl_lmops = &nfsd_posix_mng_ops;
1da177e4
LT		 2757
2758 file_lock.fl_start = lock->lk_offset;
2759 if ((lock->lk_length == ~(u64)0) ||
2760 LOFF_OVERFLOW(lock->lk_offset, lock->lk_length))
2761 file_lock.fl_end = ~(u64)0;
2762 else
2763 file_lock.fl_end = lock->lk_offset + lock->lk_length - 1;
2764 nfs4_transform_lock_offset(&file_lock);
2765
2766 /*
2767 * Try to lock the file in the VFS.
2768 * Note: locks.c uses the BKL to protect the inode's lock list.
2769 */
2770
eb76b3fd
AA		 2771 /* XXX?: Just to divert the locks_release_private at the start of
2772 * locks_copy_lock: */
150b3934 2773 locks_init_lock(&conflock);
fd85b817 2774 err = vfs_lock_file(filp, cmd, &file_lock, &conflock);
b8dd7b9a 2775 switch (-err) {
1da177e4
LT		 2776 case 0: /* success! */
2777 update_stateid(&lock_stp->st_stateid);
2778 memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid,
2779 sizeof(stateid_t));
b8dd7b9a 2780 status = 0;
eb76b3fd
AA		 2781 break;
2782 case (EAGAIN): /* conflock holds conflicting lock */
2783 status = nfserr_denied;
2784 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
2785 nfs4_set_lock_denied(&conflock, &lock->lk_denied);
2786 break;
1da177e4
LT		 2787 case (EDEADLK):
2788 status = nfserr_deadlock;
eb76b3fd 2789 break;
1da177e4 2790 default:
fd85b817 2791 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err);
eb76b3fd
AA		 2792 status = nfserr_resource;
2793 break;
1da177e4 2794 }
1da177e4 2795out:
8a280510
BF		 2796 if (status && lock->lk_is_new && lock_sop)
2797 release_stateowner(lock_sop);
3a65588a
BF		 2798 if (lock->lk_replay_owner) {
2799 nfs4_get_stateowner(lock->lk_replay_owner);
a4f1706a 2800 cstate->replay_owner = lock->lk_replay_owner;
f2327d9a 2801 }
1da177e4
LT		 2802 nfs4_unlock_state();
2803 return status;
2804}
2805
2806/*
2807 * LOCKT operation
2808 */
b37ad28b 2809__be32
ca364317
BF		 2810nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2811 struct nfsd4_lockt *lockt)
1da177e4
LT		 2812{
2813 struct inode *inode;
2814 struct file file;
2815 struct file_lock file_lock;
fd85b817 2816 int error;
b37ad28b 2817 __be32 status;
1da177e4
LT		 2818
2819 if (nfs4_in_grace())
2820 return nfserr_grace;
2821
2822 if (check_lock_length(lockt->lt_offset, lockt->lt_length))
2823 return nfserr_inval;
2824
2825 lockt->lt_stateowner = NULL;
2826 nfs4_lock_state();
2827
2828 status = nfserr_stale_clientid;
849823c5 2829 if (STALE_CLIENTID(&lockt->lt_clientid))
1da177e4 2830 goto out;
1da177e4 2831
ca364317 2832 if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) {
849823c5 2833 dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n");
1da177e4
LT		 2834 if (status == nfserr_symlink)
2835 status = nfserr_inval;
2836 goto out;
2837 }
2838
ca364317 2839 inode = cstate->current_fh.fh_dentry->d_inode;
1da177e4
LT		 2840 locks_init_lock(&file_lock);
2841 switch (lockt->lt_type) {
2842 case NFS4_READ_LT:
2843 case NFS4_READW_LT:
2844 file_lock.fl_type = F_RDLCK;
2845 break;
2846 case NFS4_WRITE_LT:
2847 case NFS4_WRITEW_LT:
2848 file_lock.fl_type = F_WRLCK;
2849 break;
2850 default:
2851 printk("NFSD: nfs4_lockt: bad lock type!\n");
2852 status = nfserr_inval;
2853 goto out;
2854 }
2855
2856 lockt->lt_stateowner = find_lockstateowner_str(inode,
2857 &lockt->lt_clientid, &lockt->lt_owner);
2858 if (lockt->lt_stateowner)
2859 file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner;
2860 file_lock.fl_pid = current->tgid;
2861 file_lock.fl_flags = FL_POSIX;
d5b9026a 2862 file_lock.fl_lmops = &nfsd_posix_mng_ops;
1da177e4
LT		 2863
2864 file_lock.fl_start = lockt->lt_offset;
2865 if ((lockt->lt_length == ~(u64)0) || LOFF_OVERFLOW(lockt->lt_offset, lockt->lt_length))
2866 file_lock.fl_end = ~(u64)0;
2867 else
2868 file_lock.fl_end = lockt->lt_offset + lockt->lt_length - 1;
2869
2870 nfs4_transform_lock_offset(&file_lock);
2871
fd85b817 2872 /* vfs_test_lock uses the struct file _only_ to resolve the inode.
1da177e4 2873 * since LOCKT doesn't require an OPEN, and therefore a struct
fd85b817 2874 * file may not exist, pass vfs_test_lock a struct file with
1da177e4
LT		 2875 * only the dentry:inode set.
2876 */
2877 memset(&file, 0, sizeof (struct file));
ca364317 2878 file.f_path.dentry = cstate->current_fh.fh_dentry;
1da177e4
LT		 2879
2880 status = nfs_ok;
fd85b817
ME		 2881 error = vfs_test_lock(&file, &file_lock);
2882 if (error) {
2883 status = nfserrno(error);
2884 goto out;
2885 }
9d6a8c5c 2886 if (file_lock.fl_type != F_UNLCK) {
1da177e4 2887 status = nfserr_denied;
9d6a8c5c 2888 nfs4_set_lock_denied(&file_lock, &lockt->lt_denied);
1da177e4
LT		 2889 }
2890out:
2891 nfs4_unlock_state();
2892 return status;
2893}
2894
b37ad28b 2895__be32
ca364317 2896nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
a4f1706a 2897 struct nfsd4_locku *locku)
1da177e4
LT		 2898{
2899 struct nfs4_stateid *stp;
2900 struct file *filp = NULL;
2901 struct file_lock file_lock;
b37ad28b 2902 __be32 status;
b8dd7b9a 2903 int err;
1da177e4
LT		 2904
2905 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
2906 (long long) locku->lu_offset,
2907 (long long) locku->lu_length);
2908
2909 if (check_lock_length(locku->lu_offset, locku->lu_length))
2910 return nfserr_inval;
2911
2912 nfs4_lock_state();
2913
ca364317 2914 if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh,
1da177e4
LT		 2915 locku->lu_seqid,
2916 &locku->lu_stateid,
2917 CHECK_FH | LOCK_STATE,
2918 &locku->lu_stateowner, &stp, NULL)))
2919 goto out;
2920
2921 filp = stp->st_vfs_file;
2922 BUG_ON(!filp);
2923 locks_init_lock(&file_lock);
2924 file_lock.fl_type = F_UNLCK;
2925 file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner;
2926 file_lock.fl_pid = current->tgid;
2927 file_lock.fl_file = filp;
2928 file_lock.fl_flags = FL_POSIX;
d5b9026a 2929 file_lock.fl_lmops = &nfsd_posix_mng_ops;
1da177e4
LT		 2930 file_lock.fl_start = locku->lu_offset;
2931
2932 if ((locku->lu_length == ~(u64)0) || LOFF_OVERFLOW(locku->lu_offset, locku->lu_length))
2933 file_lock.fl_end = ~(u64)0;
2934 else
2935 file_lock.fl_end = locku->lu_offset + locku->lu_length - 1;
2936 nfs4_transform_lock_offset(&file_lock);
2937
2938 /*
2939 * Try to unlock the file in the VFS.
2940 */
fd85b817 2941 err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL);
b8dd7b9a 2942 if (err) {
fd85b817 2943 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
1da177e4
LT		 2944 goto out_nfserr;
2945 }
2946 /*
2947 * OK, unlock succeeded; the only thing left to do is update the stateid.
2948 */
2949 update_stateid(&stp->st_stateid);
2950 memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t));
2951
2952out:
f2327d9a 2953 if (locku->lu_stateowner) {
1da177e4 2954 nfs4_get_stateowner(locku->lu_stateowner);
a4f1706a 2955 cstate->replay_owner = locku->lu_stateowner;
f2327d9a 2956 }
1da177e4
LT		 2957 nfs4_unlock_state();
2958 return status;
2959
2960out_nfserr:
b8dd7b9a 2961 status = nfserrno(err);
1da177e4
LT		 2962 goto out;
2963}
2964
2965/*
2966 * returns
2967 * 1: locks held by lockowner
2968 * 0: no locks held by lockowner
2969 */
2970static int
2971check_for_locks(struct file *filp, struct nfs4_stateowner *lowner)
2972{
2973 struct file_lock **flpp;
7eaa36e2 2974 struct inode *inode = filp->f_path.dentry->d_inode;
1da177e4
LT		 2975 int status = 0;
2976
2977 lock_kernel();
2978 for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) {
796dadfd 2979 if ((*flpp)->fl_owner == (fl_owner_t)lowner) {
1da177e4
LT		 2980 status = 1;
2981 goto out;
796dadfd 2982 }
1da177e4
LT		 2983 }
2984out:
2985 unlock_kernel();
2986 return status;
2987}
2988
b37ad28b 2989__be32
b591480b
BF		 2990nfsd4_release_lockowner(struct svc_rqst *rqstp,
2991 struct nfsd4_compound_state *cstate,
2992 struct nfsd4_release_lockowner *rlockowner)
1da177e4
LT		 2993{
2994 clientid_t *clid = &rlockowner->rl_clientid;
3e9e3dbe
N		 2995 struct nfs4_stateowner *sop;
2996 struct nfs4_stateid *stp;
1da177e4 2997 struct xdr_netobj *owner = &rlockowner->rl_owner;
3e9e3dbe
N		 2998 struct list_head matches;
2999 int i;
b37ad28b 3000 __be32 status;
1da177e4
LT		 3001
3002 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
3003 clid->cl_boot, clid->cl_id);
3004
3005 /* XXX check for lease expiration */
3006
3007 status = nfserr_stale_clientid;
849823c5 3008 if (STALE_CLIENTID(clid))
1da177e4 3009 return status;
1da177e4
LT		 3010
3011 nfs4_lock_state();
3012
3e9e3dbe
N		 3013 status = nfserr_locks_held;
3014 /* XXX: we're doing a linear search through all the lockowners.
3015 * Yipes! For now we'll just hope clients aren't really using
3016 * release_lockowner much, but eventually we have to fix these
3017 * data structures. */
3018 INIT_LIST_HEAD(&matches);
3019 for (i = 0; i < LOCK_HASH_SIZE; i++) {
3020 list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) {
3021 if (!cmp_owner_str(sop, owner, clid))
3022 continue;
3023 list_for_each_entry(stp, &sop->so_stateids,
3024 st_perstateowner) {
3025 if (check_for_locks(stp->st_vfs_file, sop))
3026 goto out;
3027 /* Note: so_perclient unused for lockowners,
3028 * so it's OK to fool with here. */
3029 list_add(&sop->so_perclient, &matches);
3030 }
1da177e4 3031 }
3e9e3dbe
N		 3032 }
3033 /* Clients probably won't expect us to return with some (but not all)
3034 * of the lockowner state released; so don't release any until all
3035 * have been checked. */
3036 status = nfs_ok;
0fa822e4
N		 3037 while (!list_empty(&matches)) {
3038 sop = list_entry(matches.next, struct nfs4_stateowner,
3039 so_perclient);
3040 /* unhash_stateowner deletes so_perclient only
3041 * for openowners. */
3042 list_del(&sop->so_perclient);
3e9e3dbe 3043 release_stateowner(sop);
1da177e4
LT		 3044 }
3045out:
3046 nfs4_unlock_state();
3047 return status;
3048}
3049
3050static inline struct nfs4_client_reclaim *
a55370a3 3051alloc_reclaim(void)
1da177e4 3052{
a55370a3 3053 return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL);
1da177e4
LT		 3054}
3055
c7b9a459
N		 3056int
3057nfs4_has_reclaimed_state(const char *name)
3058{
3059 unsigned int strhashval = clientstr_hashval(name);
3060 struct nfs4_client *clp;
3061
3062 clp = find_confirmed_client_by_str(name, strhashval);
3063 return clp ? 1 : 0;
3064}
3065
1da177e4
LT		 3066/*
3067 * failure => all reset bets are off, nfserr_no_grace...
3068 */
190e4fbf
N		 3069int
3070nfs4_client_to_reclaim(const char *name)
1da177e4
LT		 3071{
3072 unsigned int strhashval;
3073 struct nfs4_client_reclaim *crp = NULL;
3074
a55370a3
N		 3075 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name);
3076 crp = alloc_reclaim();
1da177e4
LT		 3077 if (!crp)
3078 return 0;
a55370a3 3079 strhashval = clientstr_hashval(name);
1da177e4
LT		 3080 INIT_LIST_HEAD(&crp->cr_strhash);
3081 list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]);
a55370a3 3082 memcpy(crp->cr_recdir, name, HEXDIR_LEN);
1da177e4
LT		 3083 reclaim_str_hashtbl_size++;
3084 return 1;
3085}
3086
3087static void
3088nfs4_release_reclaim(void)
3089{
3090 struct nfs4_client_reclaim *crp = NULL;
3091 int i;
3092
1da177e4
LT		 3093 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
3094 while (!list_empty(&reclaim_str_hashtbl[i])) {
3095 crp = list_entry(reclaim_str_hashtbl[i].next,
3096 struct nfs4_client_reclaim, cr_strhash);
3097 list_del(&crp->cr_strhash);
1da177e4
LT		 3098 kfree(crp);
3099 reclaim_str_hashtbl_size--;
3100 }
3101 }
3102 BUG_ON(reclaim_str_hashtbl_size);
3103}
3104
3105/*
3106 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
fd39ca9a 3107static struct nfs4_client_reclaim *
1da177e4
LT		 3108nfs4_find_reclaim_client(clientid_t *clid)
3109{
3110 unsigned int strhashval;
3111 struct nfs4_client *clp;
3112 struct nfs4_client_reclaim *crp = NULL;
3113
3114
3115 /* find clientid in conf_id_hashtbl */
3116 clp = find_confirmed_client(clid);
3117 if (clp == NULL)
3118 return NULL;
3119
a55370a3
N		 3120 dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n",
3121 clp->cl_name.len, clp->cl_name.data,
3122 clp->cl_recdir);
1da177e4
LT		 3123
3124 /* find clp->cl_name in reclaim_str_hashtbl */
a55370a3 3125 strhashval = clientstr_hashval(clp->cl_recdir);
1da177e4 3126 list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) {
a55370a3 3127 if (same_name(crp->cr_recdir, clp->cl_recdir)) {
1da177e4
LT		 3128 return crp;
3129 }
3130 }
3131 return NULL;
3132}
3133
3134/*
3135* Called from OPEN. Look for clientid in reclaim list.
3136*/
b37ad28b 3137__be32
1da177e4
LT		 3138nfs4_check_open_reclaim(clientid_t *clid)
3139{
dfc83565 3140 return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad;
1da177e4
LT		 3141}
3142
ac4d8ff2 3143/* initialization to perform at module load time: */
1da177e4 3144
ac4d8ff2
N		 3145void
3146nfs4_state_init(void)
1da177e4
LT		 3147{
3148 int i;
1da177e4 3149
1da177e4
LT		 3150 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
3151 INIT_LIST_HEAD(&conf_id_hashtbl[i]);
3152 INIT_LIST_HEAD(&conf_str_hashtbl[i]);
3153 INIT_LIST_HEAD(&unconf_str_hashtbl[i]);
3154 INIT_LIST_HEAD(&unconf_id_hashtbl[i]);
3155 }
3156 for (i = 0; i < FILE_HASH_SIZE; i++) {
3157 INIT_LIST_HEAD(&file_hashtbl[i]);
3158 }
3159 for (i = 0; i < OWNER_HASH_SIZE; i++) {
3160 INIT_LIST_HEAD(&ownerstr_hashtbl[i]);
3161 INIT_LIST_HEAD(&ownerid_hashtbl[i]);
3162 }
3163 for (i = 0; i < STATEID_HASH_SIZE; i++) {
3164 INIT_LIST_HEAD(&stateid_hashtbl[i]);
3165 INIT_LIST_HEAD(&lockstateid_hashtbl[i]);
3166 }
3167 for (i = 0; i < LOCK_HASH_SIZE; i++) {
3168 INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]);
3169 INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]);
3170 }
1da177e4 3171 memset(&onestateid, ~0, sizeof(stateid_t));
1da177e4
LT		 3172 INIT_LIST_HEAD(&close_lru);
3173 INIT_LIST_HEAD(&client_lru);
3174 INIT_LIST_HEAD(&del_recall_lru);
ac4d8ff2
N		 3175 for (i = 0; i < CLIENT_HASH_SIZE; i++)
3176 INIT_LIST_HEAD(&reclaim_str_hashtbl[i]);
3177 reclaim_str_hashtbl_size = 0;
ac4d8ff2
N		 3178}
3179
190e4fbf
N		 3180static void
3181nfsd4_load_reboot_recovery_data(void)
3182{
3183 int status;
3184
0964a3d3
N		 3185 nfs4_lock_state();
3186 nfsd4_init_recdir(user_recovery_dirname);
190e4fbf 3187 status = nfsd4_recdir_load();
0964a3d3 3188 nfs4_unlock_state();
190e4fbf
N		 3189 if (status)
3190 printk("NFSD: Failure reading reboot recovery data\n");
3191}
3192
ac4d8ff2
N		 3193/* initialization to perform when the nfsd service is started: */
3194
3195static void
3196__nfs4_state_start(void)
3197{
3198 time_t grace_time;
3199
1da177e4 3200 boot_time = get_seconds();
d99a05ad
N		 3201 grace_time = max(user_lease_time, lease_time);
3202 lease_time = user_lease_time;
a76b4319 3203 in_grace = 1;
d99a05ad 3204 printk("NFSD: starting %ld-second grace period\n", grace_time);
58da282b 3205 laundry_wq = create_singlethread_workqueue("nfsd4");
a76b4319 3206 queue_delayed_work(laundry_wq, &laundromat_work, grace_time*HZ);
1da177e4
LT		 3207}
3208
3209int
76a3550e 3210nfs4_state_start(void)
1da177e4
LT		 3211{
3212 int status;
3213
3214 if (nfs4_init)
3215 return 0;
3216 status = nfsd4_init_slabs();
3217 if (status)
3218 return status;
190e4fbf 3219 nfsd4_load_reboot_recovery_data();
76a3550e 3220 __nfs4_state_start();
1da177e4
LT		 3221 nfs4_init = 1;
3222 return 0;
3223}
3224
3225int
3226nfs4_in_grace(void)
3227{
a76b4319 3228 return in_grace;
1da177e4
LT		 3229}
3230
3231time_t
3232nfs4_lease_time(void)
3233{
3234 return lease_time;
3235}
3236
3237static void
3238__nfs4_state_shutdown(void)
3239{
3240 int i;
3241 struct nfs4_client *clp = NULL;
3242 struct nfs4_delegation *dp = NULL;
1da177e4
LT		 3243 struct list_head *pos, *next, reaplist;
3244
1da177e4
LT		 3245 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
3246 while (!list_empty(&conf_id_hashtbl[i])) {
3247 clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash);
3248 expire_client(clp);
3249 }
3250 while (!list_empty(&unconf_str_hashtbl[i])) {
3251 clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash);
3252 expire_client(clp);
3253 }
3254 }
3255 INIT_LIST_HEAD(&reaplist);
3256 spin_lock(&recall_lock);
3257 list_for_each_safe(pos, next, &del_recall_lru) {
3258 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
3259 list_move(&dp->dl_recall_lru, &reaplist);
3260 }
3261 spin_unlock(&recall_lock);
3262 list_for_each_safe(pos, next, &reaplist) {
3263 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
3264 list_del_init(&dp->dl_recall_lru);
3265 unhash_delegation(dp);
3266 }
3267
190e4fbf 3268 nfsd4_shutdown_recdir();
1da177e4 3269 nfs4_init = 0;
1da177e4
LT		 3270}
3271
3272void
3273nfs4_state_shutdown(void)
3274{
5e8d5c29
N		 3275 cancel_rearming_delayed_workqueue(laundry_wq, &laundromat_work);
3276 destroy_workqueue(laundry_wq);
1da177e4
LT		 3277 nfs4_lock_state();
3278 nfs4_release_reclaim();
3279 __nfs4_state_shutdown();
3280 nfsd4_free_slabs();
3281 nfs4_unlock_state();
3282}
3283
0964a3d3
N		 3284static void
3285nfs4_set_recdir(char *recdir)
3286{
3287 nfs4_lock_state();
3288 strcpy(user_recovery_dirname, recdir);
3289 nfs4_unlock_state();
3290}
3291
3292/*
3293 * Change the NFSv4 recovery directory to recdir.
3294 */
3295int
3296nfs4_reset_recoverydir(char *recdir)
3297{
3298 int status;
3299 struct nameidata nd;
3300
3301 status = path_lookup(recdir, LOOKUP_FOLLOW, &nd);
3302 if (status)
3303 return status;
3304 status = -ENOTDIR;
3305 if (S_ISDIR(nd.dentry->d_inode->i_mode)) {
3306 nfs4_set_recdir(recdir);
3307 status = 0;
3308 }
3309 path_release(&nd);
3310 return status;
3311}
3312
1da177e4
LT		 3313/*
3314 * Called when leasetime is changed.
3315 *
d99a05ad
N		 3316 * The only way the protocol gives us to handle on-the-fly lease changes is to
3317 * simulate a reboot. Instead of doing that, we just wait till the next time
3318 * we start to register any changes in lease time. If the administrator
3319 * really wants to change the lease time *now*, they can go ahead and bring
3320 * nfsd down and then back up again after changing the lease time.
1da177e4
LT		 3321 */
3322void
3323nfs4_reset_lease(time_t leasetime)
3324{
d99a05ad
N		 3325 lock_kernel();
3326 user_lease_time = leasetime;
3327 unlock_kernel();
1da177e4 3328}
Linux 6.x block layer and io_uring tree(s)