2 * linux/fs/nfsd/nfs4state.c
4 * Copyright (c) 2001 The Regents of the University of Michigan.
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <kandros@umich.edu>
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
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.
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.
37 #include <linux/param.h>
38 #include <linux/major.h>
39 #include <linux/slab.h>
41 #include <linux/sunrpc/svc.h>
42 #include <linux/nfsd/nfsd.h>
43 #include <linux/nfsd/cache.h>
44 #include <linux/file.h>
45 #include <linux/mount.h>
46 #include <linux/workqueue.h>
47 #include <linux/smp_lock.h>
48 #include <linux/kthread.h>
49 #include <linux/nfs4.h>
50 #include <linux/nfsd/state.h>
51 #include <linux/nfsd/xdr4.h>
52 #include <linux/namei.h>
53 #include <linux/swap.h>
54 #include <linux/mutex.h>
55 #include <linux/lockd/bind.h>
56 #include <linux/module.h>
58 #define NFSDDBG_FACILITY NFSDDBG_PROC
61 static time_t lease_time
= 90; /* default lease time */
62 static time_t user_lease_time
= 90;
63 static time_t boot_time
;
64 static int in_grace
= 1;
65 static u32 current_ownerid
= 1;
66 static u32 current_fileid
= 1;
67 static u32 current_delegid
= 1;
69 static stateid_t zerostateid
; /* bits all 0 */
70 static stateid_t onestateid
; /* bits all 1 */
72 #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t)))
73 #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t)))
75 /* forward declarations */
76 static struct nfs4_stateid
* find_stateid(stateid_t
*stid
, int flags
);
77 static struct nfs4_delegation
* find_delegation_stateid(struct inode
*ino
, stateid_t
*stid
);
78 static void release_stateid_lockowners(struct nfs4_stateid
*open_stp
);
79 static char user_recovery_dirname
[PATH_MAX
] = "/var/lib/nfs/v4recovery";
80 static void nfs4_set_recdir(char *recdir
);
85 * protects clientid_hashtbl[], clientstr_hashtbl[],
86 * unconfstr_hashtbl[], uncofid_hashtbl[].
88 static DEFINE_MUTEX(client_mutex
);
90 static struct kmem_cache
*stateowner_slab
= NULL
;
91 static struct kmem_cache
*file_slab
= NULL
;
92 static struct kmem_cache
*stateid_slab
= NULL
;
93 static struct kmem_cache
*deleg_slab
= NULL
;
98 mutex_lock(&client_mutex
);
102 nfs4_unlock_state(void)
104 mutex_unlock(&client_mutex
);
108 opaque_hashval(const void *ptr
, int nbytes
)
110 unsigned char *cptr
= (unsigned char *) ptr
;
120 /* forward declarations */
121 static void release_stateowner(struct nfs4_stateowner
*sop
);
122 static void release_stateid(struct nfs4_stateid
*stp
, int flags
);
128 /* recall_lock protects the del_recall_lru */
129 static DEFINE_SPINLOCK(recall_lock
);
130 static struct list_head del_recall_lru
;
133 free_nfs4_file(struct kref
*kref
)
135 struct nfs4_file
*fp
= container_of(kref
, struct nfs4_file
, fi_ref
);
136 list_del(&fp
->fi_hash
);
138 kmem_cache_free(file_slab
, fp
);
142 put_nfs4_file(struct nfs4_file
*fi
)
144 kref_put(&fi
->fi_ref
, free_nfs4_file
);
148 get_nfs4_file(struct nfs4_file
*fi
)
150 kref_get(&fi
->fi_ref
);
153 static int num_delegations
;
154 unsigned int max_delegations
;
157 * Open owner state (share locks)
160 /* hash tables for nfs4_stateowner */
161 #define OWNER_HASH_BITS 8
162 #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
163 #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
165 #define ownerid_hashval(id) \
166 ((id) & OWNER_HASH_MASK)
167 #define ownerstr_hashval(clientid, ownername) \
168 (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK)
170 static struct list_head ownerid_hashtbl
[OWNER_HASH_SIZE
];
171 static struct list_head ownerstr_hashtbl
[OWNER_HASH_SIZE
];
173 /* hash table for nfs4_file */
174 #define FILE_HASH_BITS 8
175 #define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
176 #define FILE_HASH_MASK (FILE_HASH_SIZE - 1)
177 /* hash table for (open)nfs4_stateid */
178 #define STATEID_HASH_BITS 10
179 #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS)
180 #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1)
182 #define file_hashval(x) \
183 hash_ptr(x, FILE_HASH_BITS)
184 #define stateid_hashval(owner_id, file_id) \
185 (((owner_id) + (file_id)) & STATEID_HASH_MASK)
187 static struct list_head file_hashtbl
[FILE_HASH_SIZE
];
188 static struct list_head stateid_hashtbl
[STATEID_HASH_SIZE
];
190 static struct nfs4_delegation
*
191 alloc_init_deleg(struct nfs4_client
*clp
, struct nfs4_stateid
*stp
, struct svc_fh
*current_fh
, u32 type
)
193 struct nfs4_delegation
*dp
;
194 struct nfs4_file
*fp
= stp
->st_file
;
195 struct nfs4_callback
*cb
= &stp
->st_stateowner
->so_client
->cl_callback
;
197 dprintk("NFSD alloc_init_deleg\n");
198 if (fp
->fi_had_conflict
)
200 if (num_delegations
> max_delegations
)
202 dp
= kmem_cache_alloc(deleg_slab
, GFP_KERNEL
);
206 INIT_LIST_HEAD(&dp
->dl_perfile
);
207 INIT_LIST_HEAD(&dp
->dl_perclnt
);
208 INIT_LIST_HEAD(&dp
->dl_recall_lru
);
213 get_file(stp
->st_vfs_file
);
214 dp
->dl_vfs_file
= stp
->st_vfs_file
;
216 dp
->dl_recall
.cbr_dp
= NULL
;
217 dp
->dl_recall
.cbr_ident
= cb
->cb_ident
;
218 dp
->dl_recall
.cbr_trunc
= 0;
219 dp
->dl_stateid
.si_boot
= boot_time
;
220 dp
->dl_stateid
.si_stateownerid
= current_delegid
++;
221 dp
->dl_stateid
.si_fileid
= 0;
222 dp
->dl_stateid
.si_generation
= 0;
223 dp
->dl_fhlen
= current_fh
->fh_handle
.fh_size
;
224 memcpy(dp
->dl_fhval
, ¤t_fh
->fh_handle
.fh_base
,
225 current_fh
->fh_handle
.fh_size
);
227 atomic_set(&dp
->dl_count
, 1);
228 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
229 list_add(&dp
->dl_perclnt
, &clp
->cl_delegations
);
234 nfs4_put_delegation(struct nfs4_delegation
*dp
)
236 if (atomic_dec_and_test(&dp
->dl_count
)) {
237 dprintk("NFSD: freeing dp %p\n",dp
);
238 put_nfs4_file(dp
->dl_file
);
239 kmem_cache_free(deleg_slab
, dp
);
244 /* Remove the associated file_lock first, then remove the delegation.
245 * lease_modify() is called to remove the FS_LEASE file_lock from
246 * the i_flock list, eventually calling nfsd's lock_manager
247 * fl_release_callback.
250 nfs4_close_delegation(struct nfs4_delegation
*dp
)
252 struct file
*filp
= dp
->dl_vfs_file
;
254 dprintk("NFSD: close_delegation dp %p\n",dp
);
255 dp
->dl_vfs_file
= NULL
;
256 /* The following nfsd_close may not actually close the file,
257 * but we want to remove the lease in any case. */
259 vfs_setlease(filp
, F_UNLCK
, &dp
->dl_flock
);
263 /* Called under the state lock. */
265 unhash_delegation(struct nfs4_delegation
*dp
)
267 list_del_init(&dp
->dl_perfile
);
268 list_del_init(&dp
->dl_perclnt
);
269 spin_lock(&recall_lock
);
270 list_del_init(&dp
->dl_recall_lru
);
271 spin_unlock(&recall_lock
);
272 nfs4_close_delegation(dp
);
273 nfs4_put_delegation(dp
);
280 /* Hash tables for nfs4_clientid state */
281 #define CLIENT_HASH_BITS 4
282 #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS)
283 #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1)
285 #define clientid_hashval(id) \
286 ((id) & CLIENT_HASH_MASK)
287 #define clientstr_hashval(name) \
288 (opaque_hashval((name), 8) & CLIENT_HASH_MASK)
290 * reclaim_str_hashtbl[] holds known client info from previous reset/reboot
291 * used in reboot/reset lease grace period processing
293 * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed
294 * setclientid_confirmed info.
296 * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed
299 * client_lru holds client queue ordered by nfs4_client.cl_time
302 * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time
303 * for last close replay.
305 static struct list_head reclaim_str_hashtbl
[CLIENT_HASH_SIZE
];
306 static int reclaim_str_hashtbl_size
= 0;
307 static struct list_head conf_id_hashtbl
[CLIENT_HASH_SIZE
];
308 static struct list_head conf_str_hashtbl
[CLIENT_HASH_SIZE
];
309 static struct list_head unconf_str_hashtbl
[CLIENT_HASH_SIZE
];
310 static struct list_head unconf_id_hashtbl
[CLIENT_HASH_SIZE
];
311 static struct list_head client_lru
;
312 static struct list_head close_lru
;
315 renew_client(struct nfs4_client
*clp
)
318 * Move client to the end to the LRU list.
320 dprintk("renewing client (clientid %08x/%08x)\n",
321 clp
->cl_clientid
.cl_boot
,
322 clp
->cl_clientid
.cl_id
);
323 list_move_tail(&clp
->cl_lru
, &client_lru
);
324 clp
->cl_time
= get_seconds();
327 /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
329 STALE_CLIENTID(clientid_t
*clid
)
331 if (clid
->cl_boot
== boot_time
)
333 dprintk("NFSD stale clientid (%08x/%08x)\n",
334 clid
->cl_boot
, clid
->cl_id
);
339 * XXX Should we use a slab cache ?
340 * This type of memory management is somewhat inefficient, but we use it
341 * anyway since SETCLIENTID is not a common operation.
343 static struct nfs4_client
*alloc_client(struct xdr_netobj name
)
345 struct nfs4_client
*clp
;
347 clp
= kzalloc(sizeof(struct nfs4_client
), GFP_KERNEL
);
350 clp
->cl_name
.data
= kmalloc(name
.len
, GFP_KERNEL
);
351 if (clp
->cl_name
.data
== NULL
) {
355 memcpy(clp
->cl_name
.data
, name
.data
, name
.len
);
356 clp
->cl_name
.len
= name
.len
;
361 shutdown_callback_client(struct nfs4_client
*clp
)
363 struct rpc_clnt
*clnt
= clp
->cl_callback
.cb_client
;
367 * Callback threads take a reference on the client, so there
368 * should be no outstanding callbacks at this point.
370 clp
->cl_callback
.cb_client
= NULL
;
371 rpc_shutdown_client(clnt
);
376 free_client(struct nfs4_client
*clp
)
378 shutdown_callback_client(clp
);
379 if (clp
->cl_cred
.cr_group_info
)
380 put_group_info(clp
->cl_cred
.cr_group_info
);
381 kfree(clp
->cl_name
.data
);
386 put_nfs4_client(struct nfs4_client
*clp
)
388 if (atomic_dec_and_test(&clp
->cl_count
))
393 expire_client(struct nfs4_client
*clp
)
395 struct nfs4_stateowner
*sop
;
396 struct nfs4_delegation
*dp
;
397 struct list_head reaplist
;
399 dprintk("NFSD: expire_client cl_count %d\n",
400 atomic_read(&clp
->cl_count
));
402 INIT_LIST_HEAD(&reaplist
);
403 spin_lock(&recall_lock
);
404 while (!list_empty(&clp
->cl_delegations
)) {
405 dp
= list_entry(clp
->cl_delegations
.next
, struct nfs4_delegation
, dl_perclnt
);
406 dprintk("NFSD: expire client. dp %p, fp %p\n", dp
,
408 list_del_init(&dp
->dl_perclnt
);
409 list_move(&dp
->dl_recall_lru
, &reaplist
);
411 spin_unlock(&recall_lock
);
412 while (!list_empty(&reaplist
)) {
413 dp
= list_entry(reaplist
.next
, struct nfs4_delegation
, dl_recall_lru
);
414 list_del_init(&dp
->dl_recall_lru
);
415 unhash_delegation(dp
);
417 list_del(&clp
->cl_idhash
);
418 list_del(&clp
->cl_strhash
);
419 list_del(&clp
->cl_lru
);
420 while (!list_empty(&clp
->cl_openowners
)) {
421 sop
= list_entry(clp
->cl_openowners
.next
, struct nfs4_stateowner
, so_perclient
);
422 release_stateowner(sop
);
424 put_nfs4_client(clp
);
427 static struct nfs4_client
*create_client(struct xdr_netobj name
, char *recdir
)
429 struct nfs4_client
*clp
;
431 clp
= alloc_client(name
);
434 memcpy(clp
->cl_recdir
, recdir
, HEXDIR_LEN
);
435 atomic_set(&clp
->cl_count
, 1);
436 atomic_set(&clp
->cl_callback
.cb_set
, 0);
437 INIT_LIST_HEAD(&clp
->cl_idhash
);
438 INIT_LIST_HEAD(&clp
->cl_strhash
);
439 INIT_LIST_HEAD(&clp
->cl_openowners
);
440 INIT_LIST_HEAD(&clp
->cl_delegations
);
441 INIT_LIST_HEAD(&clp
->cl_lru
);
445 static void copy_verf(struct nfs4_client
*target
, nfs4_verifier
*source
)
447 memcpy(target
->cl_verifier
.data
, source
->data
,
448 sizeof(target
->cl_verifier
.data
));
451 static void copy_clid(struct nfs4_client
*target
, struct nfs4_client
*source
)
453 target
->cl_clientid
.cl_boot
= source
->cl_clientid
.cl_boot
;
454 target
->cl_clientid
.cl_id
= source
->cl_clientid
.cl_id
;
457 static void copy_cred(struct svc_cred
*target
, struct svc_cred
*source
)
459 target
->cr_uid
= source
->cr_uid
;
460 target
->cr_gid
= source
->cr_gid
;
461 target
->cr_group_info
= source
->cr_group_info
;
462 get_group_info(target
->cr_group_info
);
465 static int same_name(const char *n1
, const char *n2
)
467 return 0 == memcmp(n1
, n2
, HEXDIR_LEN
);
471 same_verf(nfs4_verifier
*v1
, nfs4_verifier
*v2
)
473 return 0 == memcmp(v1
->data
, v2
->data
, sizeof(v1
->data
));
477 same_clid(clientid_t
*cl1
, clientid_t
*cl2
)
479 return (cl1
->cl_boot
== cl2
->cl_boot
) && (cl1
->cl_id
== cl2
->cl_id
);
482 /* XXX what about NGROUP */
484 same_creds(struct svc_cred
*cr1
, struct svc_cred
*cr2
)
486 return cr1
->cr_uid
== cr2
->cr_uid
;
489 static void gen_clid(struct nfs4_client
*clp
)
491 static u32 current_clientid
= 1;
493 clp
->cl_clientid
.cl_boot
= boot_time
;
494 clp
->cl_clientid
.cl_id
= current_clientid
++;
497 static void gen_confirm(struct nfs4_client
*clp
)
502 p
= (u32
*)clp
->cl_confirm
.data
;
503 *p
++ = get_seconds();
507 static int check_name(struct xdr_netobj name
)
511 if (name
.len
> NFS4_OPAQUE_LIMIT
) {
512 dprintk("NFSD: check_name: name too long(%d)!\n", name
.len
);
519 add_to_unconfirmed(struct nfs4_client
*clp
, unsigned int strhashval
)
521 unsigned int idhashval
;
523 list_add(&clp
->cl_strhash
, &unconf_str_hashtbl
[strhashval
]);
524 idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
525 list_add(&clp
->cl_idhash
, &unconf_id_hashtbl
[idhashval
]);
526 list_add_tail(&clp
->cl_lru
, &client_lru
);
527 clp
->cl_time
= get_seconds();
531 move_to_confirmed(struct nfs4_client
*clp
)
533 unsigned int idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
534 unsigned int strhashval
;
536 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp
);
537 list_del_init(&clp
->cl_strhash
);
538 list_move(&clp
->cl_idhash
, &conf_id_hashtbl
[idhashval
]);
539 strhashval
= clientstr_hashval(clp
->cl_recdir
);
540 list_add(&clp
->cl_strhash
, &conf_str_hashtbl
[strhashval
]);
544 static struct nfs4_client
*
545 find_confirmed_client(clientid_t
*clid
)
547 struct nfs4_client
*clp
;
548 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
550 list_for_each_entry(clp
, &conf_id_hashtbl
[idhashval
], cl_idhash
) {
551 if (same_clid(&clp
->cl_clientid
, clid
))
557 static struct nfs4_client
*
558 find_unconfirmed_client(clientid_t
*clid
)
560 struct nfs4_client
*clp
;
561 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
563 list_for_each_entry(clp
, &unconf_id_hashtbl
[idhashval
], cl_idhash
) {
564 if (same_clid(&clp
->cl_clientid
, clid
))
570 static struct nfs4_client
*
571 find_confirmed_client_by_str(const char *dname
, unsigned int hashval
)
573 struct nfs4_client
*clp
;
575 list_for_each_entry(clp
, &conf_str_hashtbl
[hashval
], cl_strhash
) {
576 if (same_name(clp
->cl_recdir
, dname
))
582 static struct nfs4_client
*
583 find_unconfirmed_client_by_str(const char *dname
, unsigned int hashval
)
585 struct nfs4_client
*clp
;
587 list_for_each_entry(clp
, &unconf_str_hashtbl
[hashval
], cl_strhash
) {
588 if (same_name(clp
->cl_recdir
, dname
))
594 /* a helper function for parse_callback */
596 parse_octet(unsigned int *lenp
, char **addrp
)
598 unsigned int len
= *lenp
;
610 if ((c
< '0') || (c
> '9')) {
616 n
= (n
* 10) + (c
- '0');
627 /* parse and set the setclientid ipv4 callback address */
629 parse_ipv4(unsigned int addr_len
, char *addr_val
, unsigned int *cbaddrp
, unsigned short *cbportp
)
634 u32 addrlen
= addr_len
;
635 char *addr
= addr_val
;
640 for(i
= 4; i
> 0 ; i
--) {
641 if ((temp
= parse_octet(&addrlen
, &addr
)) < 0) {
644 cbaddr
|= (temp
<< shift
);
652 for(i
= 2; i
> 0 ; i
--) {
653 if ((temp
= parse_octet(&addrlen
, &addr
)) < 0) {
656 cbport
|= (temp
<< shift
);
665 gen_callback(struct nfs4_client
*clp
, struct nfsd4_setclientid
*se
)
667 struct nfs4_callback
*cb
= &clp
->cl_callback
;
669 /* Currently, we only support tcp for the callback channel */
670 if ((se
->se_callback_netid_len
!= 3) || memcmp((char *)se
->se_callback_netid_val
, "tcp", 3))
673 if ( !(parse_ipv4(se
->se_callback_addr_len
, se
->se_callback_addr_val
,
674 &cb
->cb_addr
, &cb
->cb_port
)))
676 cb
->cb_prog
= se
->se_callback_prog
;
677 cb
->cb_ident
= se
->se_callback_ident
;
680 dprintk(KERN_INFO
"NFSD: this client (clientid %08x/%08x) "
681 "will not receive delegations\n",
682 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
688 nfsd4_setclientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
689 struct nfsd4_setclientid
*setclid
)
691 struct sockaddr_in
*sin
= svc_addr_in(rqstp
);
692 struct xdr_netobj clname
= {
693 .len
= setclid
->se_namelen
,
694 .data
= setclid
->se_name
,
696 nfs4_verifier clverifier
= setclid
->se_verf
;
697 unsigned int strhashval
;
698 struct nfs4_client
*conf
, *unconf
, *new;
700 char dname
[HEXDIR_LEN
];
702 if (!check_name(clname
))
705 status
= nfs4_make_rec_clidname(dname
, &clname
);
710 * XXX The Duplicate Request Cache (DRC) has been checked (??)
711 * We get here on a DRC miss.
714 strhashval
= clientstr_hashval(dname
);
717 conf
= find_confirmed_client_by_str(dname
, strhashval
);
719 /* RFC 3530 14.2.33 CASE 0: */
720 status
= nfserr_clid_inuse
;
721 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)
722 || conf
->cl_addr
!= sin
->sin_addr
.s_addr
) {
723 dprintk("NFSD: setclientid: string in use by client"
724 "at %u.%u.%u.%u\n", NIPQUAD(conf
->cl_addr
));
729 * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION")
730 * has a description of SETCLIENTID request processing consisting
731 * of 5 bullet points, labeled as CASE0 - CASE4 below.
733 unconf
= find_unconfirmed_client_by_str(dname
, strhashval
);
734 status
= nfserr_resource
;
737 * RFC 3530 14.2.33 CASE 4:
738 * placed first, because it is the normal case
741 expire_client(unconf
);
742 new = create_client(clname
, dname
);
746 } else if (same_verf(&conf
->cl_verifier
, &clverifier
)) {
748 * RFC 3530 14.2.33 CASE 1:
749 * probable callback update
752 /* Note this is removing unconfirmed {*x***},
753 * which is stronger than RFC recommended {vxc**}.
754 * This has the advantage that there is at most
755 * one {*x***} in either list at any time.
757 expire_client(unconf
);
759 new = create_client(clname
, dname
);
762 copy_clid(new, conf
);
763 } else if (!unconf
) {
765 * RFC 3530 14.2.33 CASE 2:
766 * probable client reboot; state will be removed if
769 new = create_client(clname
, dname
);
775 * RFC 3530 14.2.33 CASE 3:
776 * probable client reboot; state will be removed if
779 expire_client(unconf
);
780 new = create_client(clname
, dname
);
785 copy_verf(new, &clverifier
);
786 new->cl_addr
= sin
->sin_addr
.s_addr
;
787 copy_cred(&new->cl_cred
, &rqstp
->rq_cred
);
789 gen_callback(new, setclid
);
790 add_to_unconfirmed(new, strhashval
);
791 setclid
->se_clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
792 setclid
->se_clientid
.cl_id
= new->cl_clientid
.cl_id
;
793 memcpy(setclid
->se_confirm
.data
, new->cl_confirm
.data
, sizeof(setclid
->se_confirm
.data
));
802 * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has
803 * a description of SETCLIENTID_CONFIRM request processing consisting of 4
804 * bullets, labeled as CASE1 - CASE4 below.
807 nfsd4_setclientid_confirm(struct svc_rqst
*rqstp
,
808 struct nfsd4_compound_state
*cstate
,
809 struct nfsd4_setclientid_confirm
*setclientid_confirm
)
811 struct sockaddr_in
*sin
= svc_addr_in(rqstp
);
812 struct nfs4_client
*conf
, *unconf
;
813 nfs4_verifier confirm
= setclientid_confirm
->sc_confirm
;
814 clientid_t
* clid
= &setclientid_confirm
->sc_clientid
;
817 if (STALE_CLIENTID(clid
))
818 return nfserr_stale_clientid
;
820 * XXX The Duplicate Request Cache (DRC) has been checked (??)
821 * We get here on a DRC miss.
826 conf
= find_confirmed_client(clid
);
827 unconf
= find_unconfirmed_client(clid
);
829 status
= nfserr_clid_inuse
;
830 if (conf
&& conf
->cl_addr
!= sin
->sin_addr
.s_addr
)
832 if (unconf
&& unconf
->cl_addr
!= sin
->sin_addr
.s_addr
)
836 * section 14.2.34 of RFC 3530 has a description of
837 * SETCLIENTID_CONFIRM request processing consisting
838 * of 4 bullet points, labeled as CASE1 - CASE4 below.
840 if (conf
&& unconf
&& same_verf(&confirm
, &unconf
->cl_confirm
)) {
842 * RFC 3530 14.2.34 CASE 1:
845 if (!same_creds(&conf
->cl_cred
, &unconf
->cl_cred
))
846 status
= nfserr_clid_inuse
;
848 /* XXX: We just turn off callbacks until we can handle
849 * change request correctly. */
850 atomic_set(&conf
->cl_callback
.cb_set
, 0);
852 nfsd4_remove_clid_dir(unconf
);
853 expire_client(unconf
);
857 } else if (conf
&& !unconf
) {
859 * RFC 3530 14.2.34 CASE 2:
860 * probable retransmitted request; play it safe and
863 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
))
864 status
= nfserr_clid_inuse
;
867 } else if (!conf
&& unconf
868 && same_verf(&unconf
->cl_confirm
, &confirm
)) {
870 * RFC 3530 14.2.34 CASE 3:
871 * Normal case; new or rebooted client:
873 if (!same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
)) {
874 status
= nfserr_clid_inuse
;
877 clientstr_hashval(unconf
->cl_recdir
);
878 conf
= find_confirmed_client_by_str(unconf
->cl_recdir
,
881 nfsd4_remove_clid_dir(conf
);
884 move_to_confirmed(unconf
);
886 nfsd4_probe_callback(conf
);
889 } else if ((!conf
|| (conf
&& !same_verf(&conf
->cl_confirm
, &confirm
)))
890 && (!unconf
|| (unconf
&& !same_verf(&unconf
->cl_confirm
,
893 * RFC 3530 14.2.34 CASE 4:
894 * Client probably hasn't noticed that we rebooted yet.
896 status
= nfserr_stale_clientid
;
898 /* check that we have hit one of the cases...*/
899 status
= nfserr_clid_inuse
;
906 /* OPEN Share state helper functions */
907 static inline struct nfs4_file
*
908 alloc_init_file(struct inode
*ino
)
910 struct nfs4_file
*fp
;
911 unsigned int hashval
= file_hashval(ino
);
913 fp
= kmem_cache_alloc(file_slab
, GFP_KERNEL
);
915 kref_init(&fp
->fi_ref
);
916 INIT_LIST_HEAD(&fp
->fi_hash
);
917 INIT_LIST_HEAD(&fp
->fi_stateids
);
918 INIT_LIST_HEAD(&fp
->fi_delegations
);
919 list_add(&fp
->fi_hash
, &file_hashtbl
[hashval
]);
920 fp
->fi_inode
= igrab(ino
);
921 fp
->fi_id
= current_fileid
++;
922 fp
->fi_had_conflict
= false;
929 nfsd4_free_slab(struct kmem_cache
**slab
)
933 kmem_cache_destroy(*slab
);
938 nfsd4_free_slabs(void)
940 nfsd4_free_slab(&stateowner_slab
);
941 nfsd4_free_slab(&file_slab
);
942 nfsd4_free_slab(&stateid_slab
);
943 nfsd4_free_slab(&deleg_slab
);
947 nfsd4_init_slabs(void)
949 stateowner_slab
= kmem_cache_create("nfsd4_stateowners",
950 sizeof(struct nfs4_stateowner
), 0, 0, NULL
);
951 if (stateowner_slab
== NULL
)
953 file_slab
= kmem_cache_create("nfsd4_files",
954 sizeof(struct nfs4_file
), 0, 0, NULL
);
955 if (file_slab
== NULL
)
957 stateid_slab
= kmem_cache_create("nfsd4_stateids",
958 sizeof(struct nfs4_stateid
), 0, 0, NULL
);
959 if (stateid_slab
== NULL
)
961 deleg_slab
= kmem_cache_create("nfsd4_delegations",
962 sizeof(struct nfs4_delegation
), 0, 0, NULL
);
963 if (deleg_slab
== NULL
)
968 dprintk("nfsd4: out of memory while initializing nfsv4\n");
973 nfs4_free_stateowner(struct kref
*kref
)
975 struct nfs4_stateowner
*sop
=
976 container_of(kref
, struct nfs4_stateowner
, so_ref
);
977 kfree(sop
->so_owner
.data
);
978 kmem_cache_free(stateowner_slab
, sop
);
981 static inline struct nfs4_stateowner
*
982 alloc_stateowner(struct xdr_netobj
*owner
)
984 struct nfs4_stateowner
*sop
;
986 if ((sop
= kmem_cache_alloc(stateowner_slab
, GFP_KERNEL
))) {
987 if ((sop
->so_owner
.data
= kmalloc(owner
->len
, GFP_KERNEL
))) {
988 memcpy(sop
->so_owner
.data
, owner
->data
, owner
->len
);
989 sop
->so_owner
.len
= owner
->len
;
990 kref_init(&sop
->so_ref
);
993 kmem_cache_free(stateowner_slab
, sop
);
998 static struct nfs4_stateowner
*
999 alloc_init_open_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfsd4_open
*open
) {
1000 struct nfs4_stateowner
*sop
;
1001 struct nfs4_replay
*rp
;
1002 unsigned int idhashval
;
1004 if (!(sop
= alloc_stateowner(&open
->op_owner
)))
1006 idhashval
= ownerid_hashval(current_ownerid
);
1007 INIT_LIST_HEAD(&sop
->so_idhash
);
1008 INIT_LIST_HEAD(&sop
->so_strhash
);
1009 INIT_LIST_HEAD(&sop
->so_perclient
);
1010 INIT_LIST_HEAD(&sop
->so_stateids
);
1011 INIT_LIST_HEAD(&sop
->so_perstateid
); /* not used */
1012 INIT_LIST_HEAD(&sop
->so_close_lru
);
1014 list_add(&sop
->so_idhash
, &ownerid_hashtbl
[idhashval
]);
1015 list_add(&sop
->so_strhash
, &ownerstr_hashtbl
[strhashval
]);
1016 list_add(&sop
->so_perclient
, &clp
->cl_openowners
);
1017 sop
->so_is_open_owner
= 1;
1018 sop
->so_id
= current_ownerid
++;
1019 sop
->so_client
= clp
;
1020 sop
->so_seqid
= open
->op_seqid
;
1021 sop
->so_confirmed
= 0;
1022 rp
= &sop
->so_replay
;
1023 rp
->rp_status
= nfserr_serverfault
;
1025 rp
->rp_buf
= rp
->rp_ibuf
;
1030 release_stateid_lockowners(struct nfs4_stateid
*open_stp
)
1032 struct nfs4_stateowner
*lock_sop
;
1034 while (!list_empty(&open_stp
->st_lockowners
)) {
1035 lock_sop
= list_entry(open_stp
->st_lockowners
.next
,
1036 struct nfs4_stateowner
, so_perstateid
);
1037 /* list_del(&open_stp->st_lockowners); */
1038 BUG_ON(lock_sop
->so_is_open_owner
);
1039 release_stateowner(lock_sop
);
1044 unhash_stateowner(struct nfs4_stateowner
*sop
)
1046 struct nfs4_stateid
*stp
;
1048 list_del(&sop
->so_idhash
);
1049 list_del(&sop
->so_strhash
);
1050 if (sop
->so_is_open_owner
)
1051 list_del(&sop
->so_perclient
);
1052 list_del(&sop
->so_perstateid
);
1053 while (!list_empty(&sop
->so_stateids
)) {
1054 stp
= list_entry(sop
->so_stateids
.next
,
1055 struct nfs4_stateid
, st_perstateowner
);
1056 if (sop
->so_is_open_owner
)
1057 release_stateid(stp
, OPEN_STATE
);
1059 release_stateid(stp
, LOCK_STATE
);
1064 release_stateowner(struct nfs4_stateowner
*sop
)
1066 unhash_stateowner(sop
);
1067 list_del(&sop
->so_close_lru
);
1068 nfs4_put_stateowner(sop
);
1072 init_stateid(struct nfs4_stateid
*stp
, struct nfs4_file
*fp
, struct nfsd4_open
*open
) {
1073 struct nfs4_stateowner
*sop
= open
->op_stateowner
;
1074 unsigned int hashval
= stateid_hashval(sop
->so_id
, fp
->fi_id
);
1076 INIT_LIST_HEAD(&stp
->st_hash
);
1077 INIT_LIST_HEAD(&stp
->st_perstateowner
);
1078 INIT_LIST_HEAD(&stp
->st_lockowners
);
1079 INIT_LIST_HEAD(&stp
->st_perfile
);
1080 list_add(&stp
->st_hash
, &stateid_hashtbl
[hashval
]);
1081 list_add(&stp
->st_perstateowner
, &sop
->so_stateids
);
1082 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
1083 stp
->st_stateowner
= sop
;
1086 stp
->st_stateid
.si_boot
= boot_time
;
1087 stp
->st_stateid
.si_stateownerid
= sop
->so_id
;
1088 stp
->st_stateid
.si_fileid
= fp
->fi_id
;
1089 stp
->st_stateid
.si_generation
= 0;
1090 stp
->st_access_bmap
= 0;
1091 stp
->st_deny_bmap
= 0;
1092 __set_bit(open
->op_share_access
, &stp
->st_access_bmap
);
1093 __set_bit(open
->op_share_deny
, &stp
->st_deny_bmap
);
1094 stp
->st_openstp
= NULL
;
1098 release_stateid(struct nfs4_stateid
*stp
, int flags
)
1100 struct file
*filp
= stp
->st_vfs_file
;
1102 list_del(&stp
->st_hash
);
1103 list_del(&stp
->st_perfile
);
1104 list_del(&stp
->st_perstateowner
);
1105 if (flags
& OPEN_STATE
) {
1106 release_stateid_lockowners(stp
);
1107 stp
->st_vfs_file
= NULL
;
1109 } else if (flags
& LOCK_STATE
)
1110 locks_remove_posix(filp
, (fl_owner_t
) stp
->st_stateowner
);
1111 put_nfs4_file(stp
->st_file
);
1112 kmem_cache_free(stateid_slab
, stp
);
1116 move_to_close_lru(struct nfs4_stateowner
*sop
)
1118 dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop
);
1120 list_move_tail(&sop
->so_close_lru
, &close_lru
);
1121 sop
->so_time
= get_seconds();
1125 same_owner_str(struct nfs4_stateowner
*sop
, struct xdr_netobj
*owner
,
1128 return (sop
->so_owner
.len
== owner
->len
) &&
1129 0 == memcmp(sop
->so_owner
.data
, owner
->data
, owner
->len
) &&
1130 (sop
->so_client
->cl_clientid
.cl_id
== clid
->cl_id
);
1133 static struct nfs4_stateowner
*
1134 find_openstateowner_str(unsigned int hashval
, struct nfsd4_open
*open
)
1136 struct nfs4_stateowner
*so
= NULL
;
1138 list_for_each_entry(so
, &ownerstr_hashtbl
[hashval
], so_strhash
) {
1139 if (same_owner_str(so
, &open
->op_owner
, &open
->op_clientid
))
1145 /* search file_hashtbl[] for file */
1146 static struct nfs4_file
*
1147 find_file(struct inode
*ino
)
1149 unsigned int hashval
= file_hashval(ino
);
1150 struct nfs4_file
*fp
;
1152 list_for_each_entry(fp
, &file_hashtbl
[hashval
], fi_hash
) {
1153 if (fp
->fi_inode
== ino
) {
1161 static inline int access_valid(u32 x
)
1163 if (x
< NFS4_SHARE_ACCESS_READ
)
1165 if (x
> NFS4_SHARE_ACCESS_BOTH
)
1170 static inline int deny_valid(u32 x
)
1172 /* Note: unlike access bits, deny bits may be zero. */
1173 return x
<= NFS4_SHARE_DENY_BOTH
;
1177 set_access(unsigned int *access
, unsigned long bmap
) {
1181 for (i
= 1; i
< 4; i
++) {
1182 if (test_bit(i
, &bmap
))
1188 set_deny(unsigned int *deny
, unsigned long bmap
) {
1192 for (i
= 0; i
< 4; i
++) {
1193 if (test_bit(i
, &bmap
))
1199 test_share(struct nfs4_stateid
*stp
, struct nfsd4_open
*open
) {
1200 unsigned int access
, deny
;
1202 set_access(&access
, stp
->st_access_bmap
);
1203 set_deny(&deny
, stp
->st_deny_bmap
);
1204 if ((access
& open
->op_share_deny
) || (deny
& open
->op_share_access
))
1210 * Called to check deny when READ with all zero stateid or
1211 * WRITE with all zero or all one stateid
1214 nfs4_share_conflict(struct svc_fh
*current_fh
, unsigned int deny_type
)
1216 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
1217 struct nfs4_file
*fp
;
1218 struct nfs4_stateid
*stp
;
1221 dprintk("NFSD: nfs4_share_conflict\n");
1223 fp
= find_file(ino
);
1226 ret
= nfserr_locked
;
1227 /* Search for conflicting share reservations */
1228 list_for_each_entry(stp
, &fp
->fi_stateids
, st_perfile
) {
1229 if (test_bit(deny_type
, &stp
->st_deny_bmap
) ||
1230 test_bit(NFS4_SHARE_DENY_BOTH
, &stp
->st_deny_bmap
))
1240 nfs4_file_downgrade(struct file
*filp
, unsigned int share_access
)
1242 if (share_access
& NFS4_SHARE_ACCESS_WRITE
) {
1243 drop_file_write_access(filp
);
1244 filp
->f_mode
= (filp
->f_mode
| FMODE_READ
) & ~FMODE_WRITE
;
1249 * Recall a delegation
1252 do_recall(void *__dp
)
1254 struct nfs4_delegation
*dp
= __dp
;
1256 dp
->dl_file
->fi_had_conflict
= true;
1257 nfsd4_cb_recall(dp
);
1262 * Spawn a thread to perform a recall on the delegation represented
1263 * by the lease (file_lock)
1265 * Called from break_lease() with lock_kernel() held.
1266 * Note: we assume break_lease will only call this *once* for any given
1270 void nfsd_break_deleg_cb(struct file_lock
*fl
)
1272 struct nfs4_delegation
*dp
= (struct nfs4_delegation
*)fl
->fl_owner
;
1273 struct task_struct
*t
;
1275 dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp
,fl
);
1279 /* We're assuming the state code never drops its reference
1280 * without first removing the lease. Since we're in this lease
1281 * callback (and since the lease code is serialized by the kernel
1282 * lock) we know the server hasn't removed the lease yet, we know
1283 * it's safe to take a reference: */
1284 atomic_inc(&dp
->dl_count
);
1285 atomic_inc(&dp
->dl_client
->cl_count
);
1287 spin_lock(&recall_lock
);
1288 list_add_tail(&dp
->dl_recall_lru
, &del_recall_lru
);
1289 spin_unlock(&recall_lock
);
1291 /* only place dl_time is set. protected by lock_kernel*/
1292 dp
->dl_time
= get_seconds();
1295 * We don't want the locks code to timeout the lease for us;
1296 * we'll remove it ourself if the delegation isn't returned
1299 fl
->fl_break_time
= 0;
1301 t
= kthread_run(do_recall
, dp
, "%s", "nfs4_cb_recall");
1303 struct nfs4_client
*clp
= dp
->dl_client
;
1305 printk(KERN_INFO
"NFSD: Callback thread failed for "
1306 "for client (clientid %08x/%08x)\n",
1307 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
1308 put_nfs4_client(dp
->dl_client
);
1309 nfs4_put_delegation(dp
);
1314 * The file_lock is being reapd.
1316 * Called by locks_free_lock() with lock_kernel() held.
1319 void nfsd_release_deleg_cb(struct file_lock
*fl
)
1321 struct nfs4_delegation
*dp
= (struct nfs4_delegation
*)fl
->fl_owner
;
1323 dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl
,dp
, atomic_read(&dp
->dl_count
));
1325 if (!(fl
->fl_flags
& FL_LEASE
) || !dp
)
1327 dp
->dl_flock
= NULL
;
1331 * Set the delegation file_lock back pointer.
1333 * Called from setlease() with lock_kernel() held.
1336 void nfsd_copy_lock_deleg_cb(struct file_lock
*new, struct file_lock
*fl
)
1338 struct nfs4_delegation
*dp
= (struct nfs4_delegation
*)new->fl_owner
;
1340 dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp
);
1347 * Called from setlease() with lock_kernel() held
1350 int nfsd_same_client_deleg_cb(struct file_lock
*onlist
, struct file_lock
*try)
1352 struct nfs4_delegation
*onlistd
=
1353 (struct nfs4_delegation
*)onlist
->fl_owner
;
1354 struct nfs4_delegation
*tryd
=
1355 (struct nfs4_delegation
*)try->fl_owner
;
1357 if (onlist
->fl_lmops
!= try->fl_lmops
)
1360 return onlistd
->dl_client
== tryd
->dl_client
;
1365 int nfsd_change_deleg_cb(struct file_lock
**onlist
, int arg
)
1368 return lease_modify(onlist
, arg
);
1373 static struct lock_manager_operations nfsd_lease_mng_ops
= {
1374 .fl_break
= nfsd_break_deleg_cb
,
1375 .fl_release_private
= nfsd_release_deleg_cb
,
1376 .fl_copy_lock
= nfsd_copy_lock_deleg_cb
,
1377 .fl_mylease
= nfsd_same_client_deleg_cb
,
1378 .fl_change
= nfsd_change_deleg_cb
,
1383 nfsd4_process_open1(struct nfsd4_open
*open
)
1385 clientid_t
*clientid
= &open
->op_clientid
;
1386 struct nfs4_client
*clp
= NULL
;
1387 unsigned int strhashval
;
1388 struct nfs4_stateowner
*sop
= NULL
;
1390 if (!check_name(open
->op_owner
))
1391 return nfserr_inval
;
1393 if (STALE_CLIENTID(&open
->op_clientid
))
1394 return nfserr_stale_clientid
;
1396 strhashval
= ownerstr_hashval(clientid
->cl_id
, open
->op_owner
);
1397 sop
= find_openstateowner_str(strhashval
, open
);
1398 open
->op_stateowner
= sop
;
1400 /* Make sure the client's lease hasn't expired. */
1401 clp
= find_confirmed_client(clientid
);
1403 return nfserr_expired
;
1406 if (!sop
->so_confirmed
) {
1407 /* Replace unconfirmed owners without checking for replay. */
1408 clp
= sop
->so_client
;
1409 release_stateowner(sop
);
1410 open
->op_stateowner
= NULL
;
1413 if (open
->op_seqid
== sop
->so_seqid
- 1) {
1414 if (sop
->so_replay
.rp_buflen
)
1415 return nfserr_replay_me
;
1416 /* The original OPEN failed so spectacularly
1417 * that we don't even have replay data saved!
1418 * Therefore, we have no choice but to continue
1419 * processing this OPEN; presumably, we'll
1420 * fail again for the same reason.
1422 dprintk("nfsd4_process_open1: replay with no replay cache\n");
1425 if (open
->op_seqid
!= sop
->so_seqid
)
1426 return nfserr_bad_seqid
;
1428 if (open
->op_stateowner
== NULL
) {
1429 sop
= alloc_init_open_stateowner(strhashval
, clp
, open
);
1431 return nfserr_resource
;
1432 open
->op_stateowner
= sop
;
1434 list_del_init(&sop
->so_close_lru
);
1435 renew_client(sop
->so_client
);
1439 static inline __be32
1440 nfs4_check_delegmode(struct nfs4_delegation
*dp
, int flags
)
1442 if ((flags
& WR_STATE
) && (dp
->dl_type
== NFS4_OPEN_DELEGATE_READ
))
1443 return nfserr_openmode
;
1448 static struct nfs4_delegation
*
1449 find_delegation_file(struct nfs4_file
*fp
, stateid_t
*stid
)
1451 struct nfs4_delegation
*dp
;
1453 list_for_each_entry(dp
, &fp
->fi_delegations
, dl_perfile
) {
1454 if (dp
->dl_stateid
.si_stateownerid
== stid
->si_stateownerid
)
1461 nfs4_check_deleg(struct nfs4_file
*fp
, struct nfsd4_open
*open
,
1462 struct nfs4_delegation
**dp
)
1465 __be32 status
= nfserr_bad_stateid
;
1467 *dp
= find_delegation_file(fp
, &open
->op_delegate_stateid
);
1470 flags
= open
->op_share_access
== NFS4_SHARE_ACCESS_READ
?
1471 RD_STATE
: WR_STATE
;
1472 status
= nfs4_check_delegmode(*dp
, flags
);
1476 if (open
->op_claim_type
!= NFS4_OPEN_CLAIM_DELEGATE_CUR
)
1480 open
->op_stateowner
->so_confirmed
= 1;
1485 nfs4_check_open(struct nfs4_file
*fp
, struct nfsd4_open
*open
, struct nfs4_stateid
**stpp
)
1487 struct nfs4_stateid
*local
;
1488 __be32 status
= nfserr_share_denied
;
1489 struct nfs4_stateowner
*sop
= open
->op_stateowner
;
1491 list_for_each_entry(local
, &fp
->fi_stateids
, st_perfile
) {
1492 /* ignore lock owners */
1493 if (local
->st_stateowner
->so_is_open_owner
== 0)
1495 /* remember if we have seen this open owner */
1496 if (local
->st_stateowner
== sop
)
1498 /* check for conflicting share reservations */
1499 if (!test_share(local
, open
))
1507 static inline struct nfs4_stateid
*
1508 nfs4_alloc_stateid(void)
1510 return kmem_cache_alloc(stateid_slab
, GFP_KERNEL
);
1514 nfs4_new_open(struct svc_rqst
*rqstp
, struct nfs4_stateid
**stpp
,
1515 struct nfs4_delegation
*dp
,
1516 struct svc_fh
*cur_fh
, int flags
)
1518 struct nfs4_stateid
*stp
;
1520 stp
= nfs4_alloc_stateid();
1522 return nfserr_resource
;
1525 get_file(dp
->dl_vfs_file
);
1526 stp
->st_vfs_file
= dp
->dl_vfs_file
;
1529 status
= nfsd_open(rqstp
, cur_fh
, S_IFREG
, flags
,
1532 if (status
== nfserr_dropit
)
1533 status
= nfserr_jukebox
;
1534 kmem_cache_free(stateid_slab
, stp
);
1542 static inline __be32
1543 nfsd4_truncate(struct svc_rqst
*rqstp
, struct svc_fh
*fh
,
1544 struct nfsd4_open
*open
)
1546 struct iattr iattr
= {
1547 .ia_valid
= ATTR_SIZE
,
1550 if (!open
->op_truncate
)
1552 if (!(open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
))
1553 return nfserr_inval
;
1554 return nfsd_setattr(rqstp
, fh
, &iattr
, 0, (time_t)0);
1558 nfs4_upgrade_open(struct svc_rqst
*rqstp
, struct svc_fh
*cur_fh
, struct nfs4_stateid
*stp
, struct nfsd4_open
*open
)
1560 struct file
*filp
= stp
->st_vfs_file
;
1561 struct inode
*inode
= filp
->f_path
.dentry
->d_inode
;
1562 unsigned int share_access
, new_writer
;
1565 set_access(&share_access
, stp
->st_access_bmap
);
1566 new_writer
= (~share_access
) & open
->op_share_access
1567 & NFS4_SHARE_ACCESS_WRITE
;
1570 int err
= get_write_access(inode
);
1572 return nfserrno(err
);
1574 status
= nfsd4_truncate(rqstp
, cur_fh
, open
);
1577 put_write_access(inode
);
1580 /* remember the open */
1581 filp
->f_mode
|= open
->op_share_access
;
1582 set_bit(open
->op_share_access
, &stp
->st_access_bmap
);
1583 set_bit(open
->op_share_deny
, &stp
->st_deny_bmap
);
1590 nfs4_set_claim_prev(struct nfsd4_open
*open
)
1592 open
->op_stateowner
->so_confirmed
= 1;
1593 open
->op_stateowner
->so_client
->cl_firststate
= 1;
1597 * Attempt to hand out a delegation.
1600 nfs4_open_delegation(struct svc_fh
*fh
, struct nfsd4_open
*open
, struct nfs4_stateid
*stp
)
1602 struct nfs4_delegation
*dp
;
1603 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
1604 struct nfs4_callback
*cb
= &sop
->so_client
->cl_callback
;
1605 struct file_lock fl
, *flp
= &fl
;
1606 int status
, flag
= 0;
1608 flag
= NFS4_OPEN_DELEGATE_NONE
;
1609 open
->op_recall
= 0;
1610 switch (open
->op_claim_type
) {
1611 case NFS4_OPEN_CLAIM_PREVIOUS
:
1612 if (!atomic_read(&cb
->cb_set
))
1613 open
->op_recall
= 1;
1614 flag
= open
->op_delegate_type
;
1615 if (flag
== NFS4_OPEN_DELEGATE_NONE
)
1618 case NFS4_OPEN_CLAIM_NULL
:
1619 /* Let's not give out any delegations till everyone's
1620 * had the chance to reclaim theirs.... */
1621 if (nfs4_in_grace())
1623 if (!atomic_read(&cb
->cb_set
) || !sop
->so_confirmed
)
1625 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
1626 flag
= NFS4_OPEN_DELEGATE_WRITE
;
1628 flag
= NFS4_OPEN_DELEGATE_READ
;
1634 dp
= alloc_init_deleg(sop
->so_client
, stp
, fh
, flag
);
1636 flag
= NFS4_OPEN_DELEGATE_NONE
;
1639 locks_init_lock(&fl
);
1640 fl
.fl_lmops
= &nfsd_lease_mng_ops
;
1641 fl
.fl_flags
= FL_LEASE
;
1642 fl
.fl_end
= OFFSET_MAX
;
1643 fl
.fl_owner
= (fl_owner_t
)dp
;
1644 fl
.fl_file
= stp
->st_vfs_file
;
1645 fl
.fl_pid
= current
->tgid
;
1647 /* vfs_setlease checks to see if delegation should be handed out.
1648 * the lock_manager callbacks fl_mylease and fl_change are used
1650 if ((status
= vfs_setlease(stp
->st_vfs_file
,
1651 flag
== NFS4_OPEN_DELEGATE_READ
? F_RDLCK
: F_WRLCK
, &flp
))) {
1652 dprintk("NFSD: setlease failed [%d], no delegation\n", status
);
1653 unhash_delegation(dp
);
1654 flag
= NFS4_OPEN_DELEGATE_NONE
;
1658 memcpy(&open
->op_delegate_stateid
, &dp
->dl_stateid
, sizeof(dp
->dl_stateid
));
1660 dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n",
1661 dp
->dl_stateid
.si_boot
,
1662 dp
->dl_stateid
.si_stateownerid
,
1663 dp
->dl_stateid
.si_fileid
,
1664 dp
->dl_stateid
.si_generation
);
1666 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
1667 && flag
== NFS4_OPEN_DELEGATE_NONE
1668 && open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_NONE
)
1669 dprintk("NFSD: WARNING: refusing delegation reclaim\n");
1670 open
->op_delegate_type
= flag
;
1674 * called with nfs4_lock_state() held.
1677 nfsd4_process_open2(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
1679 struct nfs4_file
*fp
= NULL
;
1680 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
1681 struct nfs4_stateid
*stp
= NULL
;
1682 struct nfs4_delegation
*dp
= NULL
;
1685 status
= nfserr_inval
;
1686 if (!access_valid(open
->op_share_access
)
1687 || !deny_valid(open
->op_share_deny
))
1690 * Lookup file; if found, lookup stateid and check open request,
1691 * and check for delegations in the process of being recalled.
1692 * If not found, create the nfs4_file struct
1694 fp
= find_file(ino
);
1696 if ((status
= nfs4_check_open(fp
, open
, &stp
)))
1698 status
= nfs4_check_deleg(fp
, open
, &dp
);
1702 status
= nfserr_bad_stateid
;
1703 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
)
1705 status
= nfserr_resource
;
1706 fp
= alloc_init_file(ino
);
1712 * OPEN the file, or upgrade an existing OPEN.
1713 * If truncate fails, the OPEN fails.
1716 /* Stateid was found, this is an OPEN upgrade */
1717 status
= nfs4_upgrade_open(rqstp
, current_fh
, stp
, open
);
1720 update_stateid(&stp
->st_stateid
);
1722 /* Stateid was not found, this is a new OPEN */
1724 if (open
->op_share_access
& NFS4_SHARE_ACCESS_READ
)
1726 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
1728 status
= nfs4_new_open(rqstp
, &stp
, dp
, current_fh
, flags
);
1731 init_stateid(stp
, fp
, open
);
1732 status
= nfsd4_truncate(rqstp
, current_fh
, open
);
1734 release_stateid(stp
, OPEN_STATE
);
1738 memcpy(&open
->op_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
1741 * Attempt to hand out a delegation. No error return, because the
1742 * OPEN succeeds even if we fail.
1744 nfs4_open_delegation(current_fh
, open
, stp
);
1748 dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n",
1749 stp
->st_stateid
.si_boot
, stp
->st_stateid
.si_stateownerid
,
1750 stp
->st_stateid
.si_fileid
, stp
->st_stateid
.si_generation
);
1754 if (status
== 0 && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
1755 nfs4_set_claim_prev(open
);
1757 * To finish the open response, we just need to set the rflags.
1759 open
->op_rflags
= NFS4_OPEN_RESULT_LOCKTYPE_POSIX
;
1760 if (!open
->op_stateowner
->so_confirmed
)
1761 open
->op_rflags
|= NFS4_OPEN_RESULT_CONFIRM
;
1766 static struct workqueue_struct
*laundry_wq
;
1767 static void laundromat_main(struct work_struct
*);
1768 static DECLARE_DELAYED_WORK(laundromat_work
, laundromat_main
);
1771 nfsd4_renew(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
1774 struct nfs4_client
*clp
;
1778 dprintk("process_renew(%08x/%08x): starting\n",
1779 clid
->cl_boot
, clid
->cl_id
);
1780 status
= nfserr_stale_clientid
;
1781 if (STALE_CLIENTID(clid
))
1783 clp
= find_confirmed_client(clid
);
1784 status
= nfserr_expired
;
1786 /* We assume the client took too long to RENEW. */
1787 dprintk("nfsd4_renew: clientid not found!\n");
1791 status
= nfserr_cb_path_down
;
1792 if (!list_empty(&clp
->cl_delegations
)
1793 && !atomic_read(&clp
->cl_callback
.cb_set
))
1797 nfs4_unlock_state();
1804 dprintk("NFSD: end of grace period\n");
1805 nfsd4_recdir_purge_old();
1810 nfs4_laundromat(void)
1812 struct nfs4_client
*clp
;
1813 struct nfs4_stateowner
*sop
;
1814 struct nfs4_delegation
*dp
;
1815 struct list_head
*pos
, *next
, reaplist
;
1816 time_t cutoff
= get_seconds() - NFSD_LEASE_TIME
;
1817 time_t t
, clientid_val
= NFSD_LEASE_TIME
;
1818 time_t u
, test_val
= NFSD_LEASE_TIME
;
1822 dprintk("NFSD: laundromat service - starting\n");
1825 list_for_each_safe(pos
, next
, &client_lru
) {
1826 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
1827 if (time_after((unsigned long)clp
->cl_time
, (unsigned long)cutoff
)) {
1828 t
= clp
->cl_time
- cutoff
;
1829 if (clientid_val
> t
)
1833 dprintk("NFSD: purging unused client (clientid %08x)\n",
1834 clp
->cl_clientid
.cl_id
);
1835 nfsd4_remove_clid_dir(clp
);
1838 INIT_LIST_HEAD(&reaplist
);
1839 spin_lock(&recall_lock
);
1840 list_for_each_safe(pos
, next
, &del_recall_lru
) {
1841 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
1842 if (time_after((unsigned long)dp
->dl_time
, (unsigned long)cutoff
)) {
1843 u
= dp
->dl_time
- cutoff
;
1848 dprintk("NFSD: purging unused delegation dp %p, fp %p\n",
1850 list_move(&dp
->dl_recall_lru
, &reaplist
);
1852 spin_unlock(&recall_lock
);
1853 list_for_each_safe(pos
, next
, &reaplist
) {
1854 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
1855 list_del_init(&dp
->dl_recall_lru
);
1856 unhash_delegation(dp
);
1858 test_val
= NFSD_LEASE_TIME
;
1859 list_for_each_safe(pos
, next
, &close_lru
) {
1860 sop
= list_entry(pos
, struct nfs4_stateowner
, so_close_lru
);
1861 if (time_after((unsigned long)sop
->so_time
, (unsigned long)cutoff
)) {
1862 u
= sop
->so_time
- cutoff
;
1867 dprintk("NFSD: purging unused open stateowner (so_id %d)\n",
1869 release_stateowner(sop
);
1871 if (clientid_val
< NFSD_LAUNDROMAT_MINTIMEOUT
)
1872 clientid_val
= NFSD_LAUNDROMAT_MINTIMEOUT
;
1873 nfs4_unlock_state();
1874 return clientid_val
;
1878 laundromat_main(struct work_struct
*not_used
)
1882 t
= nfs4_laundromat();
1883 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t
);
1884 queue_delayed_work(laundry_wq
, &laundromat_work
, t
*HZ
);
1887 static struct nfs4_stateowner
*
1888 search_close_lru(u32 st_id
, int flags
)
1890 struct nfs4_stateowner
*local
= NULL
;
1892 if (flags
& CLOSE_STATE
) {
1893 list_for_each_entry(local
, &close_lru
, so_close_lru
) {
1894 if (local
->so_id
== st_id
)
1902 nfs4_check_fh(struct svc_fh
*fhp
, struct nfs4_stateid
*stp
)
1904 return fhp
->fh_dentry
->d_inode
!= stp
->st_vfs_file
->f_path
.dentry
->d_inode
;
1908 STALE_STATEID(stateid_t
*stateid
)
1910 if (stateid
->si_boot
== boot_time
)
1912 dprintk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n",
1913 stateid
->si_boot
, stateid
->si_stateownerid
, stateid
->si_fileid
,
1914 stateid
->si_generation
);
1919 access_permit_read(unsigned long access_bmap
)
1921 return test_bit(NFS4_SHARE_ACCESS_READ
, &access_bmap
) ||
1922 test_bit(NFS4_SHARE_ACCESS_BOTH
, &access_bmap
) ||
1923 test_bit(NFS4_SHARE_ACCESS_WRITE
, &access_bmap
);
1927 access_permit_write(unsigned long access_bmap
)
1929 return test_bit(NFS4_SHARE_ACCESS_WRITE
, &access_bmap
) ||
1930 test_bit(NFS4_SHARE_ACCESS_BOTH
, &access_bmap
);
1934 __be32
nfs4_check_openmode(struct nfs4_stateid
*stp
, int flags
)
1936 __be32 status
= nfserr_openmode
;
1938 if ((flags
& WR_STATE
) && (!access_permit_write(stp
->st_access_bmap
)))
1940 if ((flags
& RD_STATE
) && (!access_permit_read(stp
->st_access_bmap
)))
1947 static inline __be32
1948 check_special_stateids(svc_fh
*current_fh
, stateid_t
*stateid
, int flags
)
1950 /* Trying to call delegreturn with a special stateid? Yuch: */
1951 if (!(flags
& (RD_STATE
| WR_STATE
)))
1952 return nfserr_bad_stateid
;
1953 else if (ONE_STATEID(stateid
) && (flags
& RD_STATE
))
1955 else if (nfs4_in_grace()) {
1956 /* Answer in remaining cases depends on existance of
1957 * conflicting state; so we must wait out the grace period. */
1958 return nfserr_grace
;
1959 } else if (flags
& WR_STATE
)
1960 return nfs4_share_conflict(current_fh
,
1961 NFS4_SHARE_DENY_WRITE
);
1962 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
1963 return nfs4_share_conflict(current_fh
,
1964 NFS4_SHARE_DENY_READ
);
1968 * Allow READ/WRITE during grace period on recovered state only for files
1969 * that are not able to provide mandatory locking.
1972 io_during_grace_disallowed(struct inode
*inode
, int flags
)
1974 return nfs4_in_grace() && (flags
& (RD_STATE
| WR_STATE
))
1975 && mandatory_lock(inode
);
1979 * Checks for stateid operations
1982 nfs4_preprocess_stateid_op(struct svc_fh
*current_fh
, stateid_t
*stateid
, int flags
, struct file
**filpp
)
1984 struct nfs4_stateid
*stp
= NULL
;
1985 struct nfs4_delegation
*dp
= NULL
;
1987 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
1990 dprintk("NFSD: preprocess_stateid_op: stateid = (%08x/%08x/%08x/%08x)\n",
1991 stateid
->si_boot
, stateid
->si_stateownerid
,
1992 stateid
->si_fileid
, stateid
->si_generation
);
1996 if (io_during_grace_disallowed(ino
, flags
))
1997 return nfserr_grace
;
1999 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
2000 return check_special_stateids(current_fh
, stateid
, flags
);
2003 status
= nfserr_stale_stateid
;
2004 if (STALE_STATEID(stateid
))
2008 status
= nfserr_bad_stateid
;
2009 if (!stateid
->si_fileid
) { /* delegation stateid */
2010 if(!(dp
= find_delegation_stateid(ino
, stateid
))) {
2011 dprintk("NFSD: delegation stateid not found\n");
2014 stidp
= &dp
->dl_stateid
;
2015 } else { /* open or lock stateid */
2016 if (!(stp
= find_stateid(stateid
, flags
))) {
2017 dprintk("NFSD: open or lock stateid not found\n");
2020 if ((flags
& CHECK_FH
) && nfs4_check_fh(current_fh
, stp
))
2022 if (!stp
->st_stateowner
->so_confirmed
)
2024 stidp
= &stp
->st_stateid
;
2026 if (stateid
->si_generation
> stidp
->si_generation
)
2030 status
= nfserr_old_stateid
;
2031 if (stateid
->si_generation
< stidp
->si_generation
)
2034 if ((status
= nfs4_check_openmode(stp
,flags
)))
2036 renew_client(stp
->st_stateowner
->so_client
);
2038 *filpp
= stp
->st_vfs_file
;
2040 if ((status
= nfs4_check_delegmode(dp
, flags
)))
2042 renew_client(dp
->dl_client
);
2043 if (flags
& DELEG_RET
)
2044 unhash_delegation(dp
);
2046 *filpp
= dp
->dl_vfs_file
;
2056 return (type
== NFS4_READW_LT
|| type
== NFS4_READ_LT
) ?
2057 RD_STATE
: WR_STATE
;
2061 * Checks for sequence id mutating operations.
2064 nfs4_preprocess_seqid_op(struct svc_fh
*current_fh
, u32 seqid
, stateid_t
*stateid
, int flags
, struct nfs4_stateowner
**sopp
, struct nfs4_stateid
**stpp
, struct nfsd4_lock
*lock
)
2066 struct nfs4_stateid
*stp
;
2067 struct nfs4_stateowner
*sop
;
2069 dprintk("NFSD: preprocess_seqid_op: seqid=%d "
2070 "stateid = (%08x/%08x/%08x/%08x)\n", seqid
,
2071 stateid
->si_boot
, stateid
->si_stateownerid
, stateid
->si_fileid
,
2072 stateid
->si_generation
);
2077 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
)) {
2078 dprintk("NFSD: preprocess_seqid_op: magic stateid!\n");
2079 return nfserr_bad_stateid
;
2082 if (STALE_STATEID(stateid
))
2083 return nfserr_stale_stateid
;
2085 * We return BAD_STATEID if filehandle doesn't match stateid,
2086 * the confirmed flag is incorrecly set, or the generation
2087 * number is incorrect.
2089 stp
= find_stateid(stateid
, flags
);
2092 * Also, we should make sure this isn't just the result of
2095 sop
= search_close_lru(stateid
->si_stateownerid
, flags
);
2097 return nfserr_bad_stateid
;
2103 *sopp
= sop
= stp
->st_stateowner
;
2106 clientid_t
*lockclid
= &lock
->v
.new.clientid
;
2107 struct nfs4_client
*clp
= sop
->so_client
;
2111 lkflg
= setlkflg(lock
->lk_type
);
2113 if (lock
->lk_is_new
) {
2114 if (!sop
->so_is_open_owner
)
2115 return nfserr_bad_stateid
;
2116 if (!same_clid(&clp
->cl_clientid
, lockclid
))
2117 return nfserr_bad_stateid
;
2118 /* stp is the open stateid */
2119 status
= nfs4_check_openmode(stp
, lkflg
);
2123 /* stp is the lock stateid */
2124 status
= nfs4_check_openmode(stp
->st_openstp
, lkflg
);
2130 if ((flags
& CHECK_FH
) && nfs4_check_fh(current_fh
, stp
)) {
2131 dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n");
2132 return nfserr_bad_stateid
;
2136 * We now validate the seqid and stateid generation numbers.
2137 * For the moment, we ignore the possibility of
2138 * generation number wraparound.
2140 if (seqid
!= sop
->so_seqid
)
2143 if (sop
->so_confirmed
&& flags
& CONFIRM
) {
2144 dprintk("NFSD: preprocess_seqid_op: expected"
2145 " unconfirmed stateowner!\n");
2146 return nfserr_bad_stateid
;
2148 if (!sop
->so_confirmed
&& !(flags
& CONFIRM
)) {
2149 dprintk("NFSD: preprocess_seqid_op: stateowner not"
2150 " confirmed yet!\n");
2151 return nfserr_bad_stateid
;
2153 if (stateid
->si_generation
> stp
->st_stateid
.si_generation
) {
2154 dprintk("NFSD: preprocess_seqid_op: future stateid?!\n");
2155 return nfserr_bad_stateid
;
2158 if (stateid
->si_generation
< stp
->st_stateid
.si_generation
) {
2159 dprintk("NFSD: preprocess_seqid_op: old stateid!\n");
2160 return nfserr_old_stateid
;
2162 renew_client(sop
->so_client
);
2166 if (seqid
== sop
->so_seqid
- 1) {
2167 dprintk("NFSD: preprocess_seqid_op: retransmission?\n");
2168 /* indicate replay to calling function */
2169 return nfserr_replay_me
;
2171 dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n",
2172 sop
->so_seqid
, seqid
);
2174 return nfserr_bad_seqid
;
2178 nfsd4_open_confirm(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2179 struct nfsd4_open_confirm
*oc
)
2182 struct nfs4_stateowner
*sop
;
2183 struct nfs4_stateid
*stp
;
2185 dprintk("NFSD: nfsd4_open_confirm on file %.*s\n",
2186 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
2187 cstate
->current_fh
.fh_dentry
->d_name
.name
);
2189 status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0);
2195 if ((status
= nfs4_preprocess_seqid_op(&cstate
->current_fh
,
2196 oc
->oc_seqid
, &oc
->oc_req_stateid
,
2197 CHECK_FH
| CONFIRM
| OPEN_STATE
,
2198 &oc
->oc_stateowner
, &stp
, NULL
)))
2201 sop
= oc
->oc_stateowner
;
2202 sop
->so_confirmed
= 1;
2203 update_stateid(&stp
->st_stateid
);
2204 memcpy(&oc
->oc_resp_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
2205 dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d "
2206 "stateid=(%08x/%08x/%08x/%08x)\n", oc
->oc_seqid
,
2207 stp
->st_stateid
.si_boot
,
2208 stp
->st_stateid
.si_stateownerid
,
2209 stp
->st_stateid
.si_fileid
,
2210 stp
->st_stateid
.si_generation
);
2212 nfsd4_create_clid_dir(sop
->so_client
);
2214 if (oc
->oc_stateowner
) {
2215 nfs4_get_stateowner(oc
->oc_stateowner
);
2216 cstate
->replay_owner
= oc
->oc_stateowner
;
2218 nfs4_unlock_state();
2224 * unset all bits in union bitmap (bmap) that
2225 * do not exist in share (from successful OPEN_DOWNGRADE)
2228 reset_union_bmap_access(unsigned long access
, unsigned long *bmap
)
2231 for (i
= 1; i
< 4; i
++) {
2232 if ((i
& access
) != i
)
2233 __clear_bit(i
, bmap
);
2238 reset_union_bmap_deny(unsigned long deny
, unsigned long *bmap
)
2241 for (i
= 0; i
< 4; i
++) {
2242 if ((i
& deny
) != i
)
2243 __clear_bit(i
, bmap
);
2248 nfsd4_open_downgrade(struct svc_rqst
*rqstp
,
2249 struct nfsd4_compound_state
*cstate
,
2250 struct nfsd4_open_downgrade
*od
)
2253 struct nfs4_stateid
*stp
;
2254 unsigned int share_access
;
2256 dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n",
2257 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
2258 cstate
->current_fh
.fh_dentry
->d_name
.name
);
2260 if (!access_valid(od
->od_share_access
)
2261 || !deny_valid(od
->od_share_deny
))
2262 return nfserr_inval
;
2265 if ((status
= nfs4_preprocess_seqid_op(&cstate
->current_fh
,
2268 CHECK_FH
| OPEN_STATE
,
2269 &od
->od_stateowner
, &stp
, NULL
)))
2272 status
= nfserr_inval
;
2273 if (!test_bit(od
->od_share_access
, &stp
->st_access_bmap
)) {
2274 dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n",
2275 stp
->st_access_bmap
, od
->od_share_access
);
2278 if (!test_bit(od
->od_share_deny
, &stp
->st_deny_bmap
)) {
2279 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
2280 stp
->st_deny_bmap
, od
->od_share_deny
);
2283 set_access(&share_access
, stp
->st_access_bmap
);
2284 nfs4_file_downgrade(stp
->st_vfs_file
,
2285 share_access
& ~od
->od_share_access
);
2287 reset_union_bmap_access(od
->od_share_access
, &stp
->st_access_bmap
);
2288 reset_union_bmap_deny(od
->od_share_deny
, &stp
->st_deny_bmap
);
2290 update_stateid(&stp
->st_stateid
);
2291 memcpy(&od
->od_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
2294 if (od
->od_stateowner
) {
2295 nfs4_get_stateowner(od
->od_stateowner
);
2296 cstate
->replay_owner
= od
->od_stateowner
;
2298 nfs4_unlock_state();
2303 * nfs4_unlock_state() called after encode
2306 nfsd4_close(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2307 struct nfsd4_close
*close
)
2310 struct nfs4_stateid
*stp
;
2312 dprintk("NFSD: nfsd4_close on file %.*s\n",
2313 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
2314 cstate
->current_fh
.fh_dentry
->d_name
.name
);
2317 /* check close_lru for replay */
2318 if ((status
= nfs4_preprocess_seqid_op(&cstate
->current_fh
,
2321 CHECK_FH
| OPEN_STATE
| CLOSE_STATE
,
2322 &close
->cl_stateowner
, &stp
, NULL
)))
2325 update_stateid(&stp
->st_stateid
);
2326 memcpy(&close
->cl_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
2328 /* release_stateid() calls nfsd_close() if needed */
2329 release_stateid(stp
, OPEN_STATE
);
2331 /* place unused nfs4_stateowners on so_close_lru list to be
2332 * released by the laundromat service after the lease period
2333 * to enable us to handle CLOSE replay
2335 if (list_empty(&close
->cl_stateowner
->so_stateids
))
2336 move_to_close_lru(close
->cl_stateowner
);
2338 if (close
->cl_stateowner
) {
2339 nfs4_get_stateowner(close
->cl_stateowner
);
2340 cstate
->replay_owner
= close
->cl_stateowner
;
2342 nfs4_unlock_state();
2347 nfsd4_delegreturn(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2348 struct nfsd4_delegreturn
*dr
)
2352 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
2356 status
= nfs4_preprocess_stateid_op(&cstate
->current_fh
,
2357 &dr
->dr_stateid
, DELEG_RET
, NULL
);
2358 nfs4_unlock_state();
2365 * Lock owner state (byte-range locks)
2367 #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
2368 #define LOCK_HASH_BITS 8
2369 #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS)
2370 #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1)
2372 #define lockownerid_hashval(id) \
2373 ((id) & LOCK_HASH_MASK)
2375 static inline unsigned int
2376 lock_ownerstr_hashval(struct inode
*inode
, u32 cl_id
,
2377 struct xdr_netobj
*ownername
)
2379 return (file_hashval(inode
) + cl_id
2380 + opaque_hashval(ownername
->data
, ownername
->len
))
2384 static struct list_head lock_ownerid_hashtbl
[LOCK_HASH_SIZE
];
2385 static struct list_head lock_ownerstr_hashtbl
[LOCK_HASH_SIZE
];
2386 static struct list_head lockstateid_hashtbl
[STATEID_HASH_SIZE
];
2388 static struct nfs4_stateid
*
2389 find_stateid(stateid_t
*stid
, int flags
)
2391 struct nfs4_stateid
*local
= NULL
;
2392 u32 st_id
= stid
->si_stateownerid
;
2393 u32 f_id
= stid
->si_fileid
;
2394 unsigned int hashval
;
2396 dprintk("NFSD: find_stateid flags 0x%x\n",flags
);
2397 if ((flags
& LOCK_STATE
) || (flags
& RD_STATE
) || (flags
& WR_STATE
)) {
2398 hashval
= stateid_hashval(st_id
, f_id
);
2399 list_for_each_entry(local
, &lockstateid_hashtbl
[hashval
], st_hash
) {
2400 if ((local
->st_stateid
.si_stateownerid
== st_id
) &&
2401 (local
->st_stateid
.si_fileid
== f_id
))
2405 if ((flags
& OPEN_STATE
) || (flags
& RD_STATE
) || (flags
& WR_STATE
)) {
2406 hashval
= stateid_hashval(st_id
, f_id
);
2407 list_for_each_entry(local
, &stateid_hashtbl
[hashval
], st_hash
) {
2408 if ((local
->st_stateid
.si_stateownerid
== st_id
) &&
2409 (local
->st_stateid
.si_fileid
== f_id
))
2416 static struct nfs4_delegation
*
2417 find_delegation_stateid(struct inode
*ino
, stateid_t
*stid
)
2419 struct nfs4_file
*fp
;
2420 struct nfs4_delegation
*dl
;
2422 dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n",
2423 stid
->si_boot
, stid
->si_stateownerid
,
2424 stid
->si_fileid
, stid
->si_generation
);
2426 fp
= find_file(ino
);
2429 dl
= find_delegation_file(fp
, stid
);
2435 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
2436 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
2437 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
2438 * locking, this prevents us from being completely protocol-compliant. The
2439 * real solution to this problem is to start using unsigned file offsets in
2440 * the VFS, but this is a very deep change!
2443 nfs4_transform_lock_offset(struct file_lock
*lock
)
2445 if (lock
->fl_start
< 0)
2446 lock
->fl_start
= OFFSET_MAX
;
2447 if (lock
->fl_end
< 0)
2448 lock
->fl_end
= OFFSET_MAX
;
2451 /* Hack!: For now, we're defining this just so we can use a pointer to it
2452 * as a unique cookie to identify our (NFSv4's) posix locks. */
2453 static struct lock_manager_operations nfsd_posix_mng_ops
= {
2457 nfs4_set_lock_denied(struct file_lock
*fl
, struct nfsd4_lock_denied
*deny
)
2459 struct nfs4_stateowner
*sop
;
2462 if (fl
->fl_lmops
== &nfsd_posix_mng_ops
) {
2463 sop
= (struct nfs4_stateowner
*) fl
->fl_owner
;
2464 hval
= lockownerid_hashval(sop
->so_id
);
2465 kref_get(&sop
->so_ref
);
2467 deny
->ld_clientid
= sop
->so_client
->cl_clientid
;
2469 deny
->ld_sop
= NULL
;
2470 deny
->ld_clientid
.cl_boot
= 0;
2471 deny
->ld_clientid
.cl_id
= 0;
2473 deny
->ld_start
= fl
->fl_start
;
2474 deny
->ld_length
= ~(u64
)0;
2475 if (fl
->fl_end
!= ~(u64
)0)
2476 deny
->ld_length
= fl
->fl_end
- fl
->fl_start
+ 1;
2477 deny
->ld_type
= NFS4_READ_LT
;
2478 if (fl
->fl_type
!= F_RDLCK
)
2479 deny
->ld_type
= NFS4_WRITE_LT
;
2482 static struct nfs4_stateowner
*
2483 find_lockstateowner_str(struct inode
*inode
, clientid_t
*clid
,
2484 struct xdr_netobj
*owner
)
2486 unsigned int hashval
= lock_ownerstr_hashval(inode
, clid
->cl_id
, owner
);
2487 struct nfs4_stateowner
*op
;
2489 list_for_each_entry(op
, &lock_ownerstr_hashtbl
[hashval
], so_strhash
) {
2490 if (same_owner_str(op
, owner
, clid
))
2497 * Alloc a lock owner structure.
2498 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
2501 * strhashval = lock_ownerstr_hashval
2504 static struct nfs4_stateowner
*
2505 alloc_init_lock_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_stateid
*open_stp
, struct nfsd4_lock
*lock
) {
2506 struct nfs4_stateowner
*sop
;
2507 struct nfs4_replay
*rp
;
2508 unsigned int idhashval
;
2510 if (!(sop
= alloc_stateowner(&lock
->lk_new_owner
)))
2512 idhashval
= lockownerid_hashval(current_ownerid
);
2513 INIT_LIST_HEAD(&sop
->so_idhash
);
2514 INIT_LIST_HEAD(&sop
->so_strhash
);
2515 INIT_LIST_HEAD(&sop
->so_perclient
);
2516 INIT_LIST_HEAD(&sop
->so_stateids
);
2517 INIT_LIST_HEAD(&sop
->so_perstateid
);
2518 INIT_LIST_HEAD(&sop
->so_close_lru
); /* not used */
2520 list_add(&sop
->so_idhash
, &lock_ownerid_hashtbl
[idhashval
]);
2521 list_add(&sop
->so_strhash
, &lock_ownerstr_hashtbl
[strhashval
]);
2522 list_add(&sop
->so_perstateid
, &open_stp
->st_lockowners
);
2523 sop
->so_is_open_owner
= 0;
2524 sop
->so_id
= current_ownerid
++;
2525 sop
->so_client
= clp
;
2526 /* It is the openowner seqid that will be incremented in encode in the
2527 * case of new lockowners; so increment the lock seqid manually: */
2528 sop
->so_seqid
= lock
->lk_new_lock_seqid
+ 1;
2529 sop
->so_confirmed
= 1;
2530 rp
= &sop
->so_replay
;
2531 rp
->rp_status
= nfserr_serverfault
;
2533 rp
->rp_buf
= rp
->rp_ibuf
;
2537 static struct nfs4_stateid
*
2538 alloc_init_lock_stateid(struct nfs4_stateowner
*sop
, struct nfs4_file
*fp
, struct nfs4_stateid
*open_stp
)
2540 struct nfs4_stateid
*stp
;
2541 unsigned int hashval
= stateid_hashval(sop
->so_id
, fp
->fi_id
);
2543 stp
= nfs4_alloc_stateid();
2546 INIT_LIST_HEAD(&stp
->st_hash
);
2547 INIT_LIST_HEAD(&stp
->st_perfile
);
2548 INIT_LIST_HEAD(&stp
->st_perstateowner
);
2549 INIT_LIST_HEAD(&stp
->st_lockowners
); /* not used */
2550 list_add(&stp
->st_hash
, &lockstateid_hashtbl
[hashval
]);
2551 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
2552 list_add(&stp
->st_perstateowner
, &sop
->so_stateids
);
2553 stp
->st_stateowner
= sop
;
2556 stp
->st_stateid
.si_boot
= boot_time
;
2557 stp
->st_stateid
.si_stateownerid
= sop
->so_id
;
2558 stp
->st_stateid
.si_fileid
= fp
->fi_id
;
2559 stp
->st_stateid
.si_generation
= 0;
2560 stp
->st_vfs_file
= open_stp
->st_vfs_file
; /* FIXME refcount?? */
2561 stp
->st_access_bmap
= open_stp
->st_access_bmap
;
2562 stp
->st_deny_bmap
= open_stp
->st_deny_bmap
;
2563 stp
->st_openstp
= open_stp
;
2570 check_lock_length(u64 offset
, u64 length
)
2572 return ((length
== 0) || ((length
!= ~(u64
)0) &&
2573 LOFF_OVERFLOW(offset
, length
)));
2580 nfsd4_lock(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2581 struct nfsd4_lock
*lock
)
2583 struct nfs4_stateowner
*open_sop
= NULL
;
2584 struct nfs4_stateowner
*lock_sop
= NULL
;
2585 struct nfs4_stateid
*lock_stp
;
2587 struct file_lock file_lock
;
2588 struct file_lock conflock
;
2590 unsigned int strhashval
;
2594 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
2595 (long long) lock
->lk_offset
,
2596 (long long) lock
->lk_length
);
2598 if (check_lock_length(lock
->lk_offset
, lock
->lk_length
))
2599 return nfserr_inval
;
2601 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
,
2602 S_IFREG
, MAY_LOCK
))) {
2603 dprintk("NFSD: nfsd4_lock: permission denied!\n");
2609 if (lock
->lk_is_new
) {
2611 * Client indicates that this is a new lockowner.
2612 * Use open owner and open stateid to create lock owner and
2615 struct nfs4_stateid
*open_stp
= NULL
;
2616 struct nfs4_file
*fp
;
2618 status
= nfserr_stale_clientid
;
2619 if (STALE_CLIENTID(&lock
->lk_new_clientid
))
2622 /* validate and update open stateid and open seqid */
2623 status
= nfs4_preprocess_seqid_op(&cstate
->current_fh
,
2624 lock
->lk_new_open_seqid
,
2625 &lock
->lk_new_open_stateid
,
2626 CHECK_FH
| OPEN_STATE
,
2627 &lock
->lk_replay_owner
, &open_stp
,
2631 open_sop
= lock
->lk_replay_owner
;
2632 /* create lockowner and lock stateid */
2633 fp
= open_stp
->st_file
;
2634 strhashval
= lock_ownerstr_hashval(fp
->fi_inode
,
2635 open_sop
->so_client
->cl_clientid
.cl_id
,
2636 &lock
->v
.new.owner
);
2637 /* XXX: Do we need to check for duplicate stateowners on
2638 * the same file, or should they just be allowed (and
2639 * create new stateids)? */
2640 status
= nfserr_resource
;
2641 lock_sop
= alloc_init_lock_stateowner(strhashval
,
2642 open_sop
->so_client
, open_stp
, lock
);
2643 if (lock_sop
== NULL
)
2645 lock_stp
= alloc_init_lock_stateid(lock_sop
, fp
, open_stp
);
2646 if (lock_stp
== NULL
)
2649 /* lock (lock owner + lock stateid) already exists */
2650 status
= nfs4_preprocess_seqid_op(&cstate
->current_fh
,
2651 lock
->lk_old_lock_seqid
,
2652 &lock
->lk_old_lock_stateid
,
2653 CHECK_FH
| LOCK_STATE
,
2654 &lock
->lk_replay_owner
, &lock_stp
, lock
);
2657 lock_sop
= lock
->lk_replay_owner
;
2659 /* lock->lk_replay_owner and lock_stp have been created or found */
2660 filp
= lock_stp
->st_vfs_file
;
2662 status
= nfserr_grace
;
2663 if (nfs4_in_grace() && !lock
->lk_reclaim
)
2665 status
= nfserr_no_grace
;
2666 if (!nfs4_in_grace() && lock
->lk_reclaim
)
2669 locks_init_lock(&file_lock
);
2670 switch (lock
->lk_type
) {
2673 file_lock
.fl_type
= F_RDLCK
;
2677 case NFS4_WRITEW_LT
:
2678 file_lock
.fl_type
= F_WRLCK
;
2682 status
= nfserr_inval
;
2685 file_lock
.fl_owner
= (fl_owner_t
)lock_sop
;
2686 file_lock
.fl_pid
= current
->tgid
;
2687 file_lock
.fl_file
= filp
;
2688 file_lock
.fl_flags
= FL_POSIX
;
2689 file_lock
.fl_lmops
= &nfsd_posix_mng_ops
;
2691 file_lock
.fl_start
= lock
->lk_offset
;
2692 if ((lock
->lk_length
== ~(u64
)0) ||
2693 LOFF_OVERFLOW(lock
->lk_offset
, lock
->lk_length
))
2694 file_lock
.fl_end
= ~(u64
)0;
2696 file_lock
.fl_end
= lock
->lk_offset
+ lock
->lk_length
- 1;
2697 nfs4_transform_lock_offset(&file_lock
);
2700 * Try to lock the file in the VFS.
2701 * Note: locks.c uses the BKL to protect the inode's lock list.
2704 /* XXX?: Just to divert the locks_release_private at the start of
2705 * locks_copy_lock: */
2706 locks_init_lock(&conflock
);
2707 err
= vfs_lock_file(filp
, cmd
, &file_lock
, &conflock
);
2709 case 0: /* success! */
2710 update_stateid(&lock_stp
->st_stateid
);
2711 memcpy(&lock
->lk_resp_stateid
, &lock_stp
->st_stateid
,
2715 case (EAGAIN
): /* conflock holds conflicting lock */
2716 status
= nfserr_denied
;
2717 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
2718 nfs4_set_lock_denied(&conflock
, &lock
->lk_denied
);
2721 status
= nfserr_deadlock
;
2724 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err
);
2725 status
= nfserr_resource
;
2729 if (status
&& lock
->lk_is_new
&& lock_sop
)
2730 release_stateowner(lock_sop
);
2731 if (lock
->lk_replay_owner
) {
2732 nfs4_get_stateowner(lock
->lk_replay_owner
);
2733 cstate
->replay_owner
= lock
->lk_replay_owner
;
2735 nfs4_unlock_state();
2743 nfsd4_lockt(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2744 struct nfsd4_lockt
*lockt
)
2746 struct inode
*inode
;
2748 struct file_lock file_lock
;
2752 if (nfs4_in_grace())
2753 return nfserr_grace
;
2755 if (check_lock_length(lockt
->lt_offset
, lockt
->lt_length
))
2756 return nfserr_inval
;
2758 lockt
->lt_stateowner
= NULL
;
2761 status
= nfserr_stale_clientid
;
2762 if (STALE_CLIENTID(&lockt
->lt_clientid
))
2765 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0))) {
2766 dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n");
2767 if (status
== nfserr_symlink
)
2768 status
= nfserr_inval
;
2772 inode
= cstate
->current_fh
.fh_dentry
->d_inode
;
2773 locks_init_lock(&file_lock
);
2774 switch (lockt
->lt_type
) {
2777 file_lock
.fl_type
= F_RDLCK
;
2780 case NFS4_WRITEW_LT
:
2781 file_lock
.fl_type
= F_WRLCK
;
2784 dprintk("NFSD: nfs4_lockt: bad lock type!\n");
2785 status
= nfserr_inval
;
2789 lockt
->lt_stateowner
= find_lockstateowner_str(inode
,
2790 &lockt
->lt_clientid
, &lockt
->lt_owner
);
2791 if (lockt
->lt_stateowner
)
2792 file_lock
.fl_owner
= (fl_owner_t
)lockt
->lt_stateowner
;
2793 file_lock
.fl_pid
= current
->tgid
;
2794 file_lock
.fl_flags
= FL_POSIX
;
2795 file_lock
.fl_lmops
= &nfsd_posix_mng_ops
;
2797 file_lock
.fl_start
= lockt
->lt_offset
;
2798 if ((lockt
->lt_length
== ~(u64
)0) || LOFF_OVERFLOW(lockt
->lt_offset
, lockt
->lt_length
))
2799 file_lock
.fl_end
= ~(u64
)0;
2801 file_lock
.fl_end
= lockt
->lt_offset
+ lockt
->lt_length
- 1;
2803 nfs4_transform_lock_offset(&file_lock
);
2805 /* vfs_test_lock uses the struct file _only_ to resolve the inode.
2806 * since LOCKT doesn't require an OPEN, and therefore a struct
2807 * file may not exist, pass vfs_test_lock a struct file with
2808 * only the dentry:inode set.
2810 memset(&file
, 0, sizeof (struct file
));
2811 file
.f_path
.dentry
= cstate
->current_fh
.fh_dentry
;
2814 error
= vfs_test_lock(&file
, &file_lock
);
2816 status
= nfserrno(error
);
2819 if (file_lock
.fl_type
!= F_UNLCK
) {
2820 status
= nfserr_denied
;
2821 nfs4_set_lock_denied(&file_lock
, &lockt
->lt_denied
);
2824 nfs4_unlock_state();
2829 nfsd4_locku(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2830 struct nfsd4_locku
*locku
)
2832 struct nfs4_stateid
*stp
;
2833 struct file
*filp
= NULL
;
2834 struct file_lock file_lock
;
2838 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
2839 (long long) locku
->lu_offset
,
2840 (long long) locku
->lu_length
);
2842 if (check_lock_length(locku
->lu_offset
, locku
->lu_length
))
2843 return nfserr_inval
;
2847 if ((status
= nfs4_preprocess_seqid_op(&cstate
->current_fh
,
2850 CHECK_FH
| LOCK_STATE
,
2851 &locku
->lu_stateowner
, &stp
, NULL
)))
2854 filp
= stp
->st_vfs_file
;
2856 locks_init_lock(&file_lock
);
2857 file_lock
.fl_type
= F_UNLCK
;
2858 file_lock
.fl_owner
= (fl_owner_t
) locku
->lu_stateowner
;
2859 file_lock
.fl_pid
= current
->tgid
;
2860 file_lock
.fl_file
= filp
;
2861 file_lock
.fl_flags
= FL_POSIX
;
2862 file_lock
.fl_lmops
= &nfsd_posix_mng_ops
;
2863 file_lock
.fl_start
= locku
->lu_offset
;
2865 if ((locku
->lu_length
== ~(u64
)0) || LOFF_OVERFLOW(locku
->lu_offset
, locku
->lu_length
))
2866 file_lock
.fl_end
= ~(u64
)0;
2868 file_lock
.fl_end
= locku
->lu_offset
+ locku
->lu_length
- 1;
2869 nfs4_transform_lock_offset(&file_lock
);
2872 * Try to unlock the file in the VFS.
2874 err
= vfs_lock_file(filp
, F_SETLK
, &file_lock
, NULL
);
2876 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
2880 * OK, unlock succeeded; the only thing left to do is update the stateid.
2882 update_stateid(&stp
->st_stateid
);
2883 memcpy(&locku
->lu_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
2886 if (locku
->lu_stateowner
) {
2887 nfs4_get_stateowner(locku
->lu_stateowner
);
2888 cstate
->replay_owner
= locku
->lu_stateowner
;
2890 nfs4_unlock_state();
2894 status
= nfserrno(err
);
2900 * 1: locks held by lockowner
2901 * 0: no locks held by lockowner
2904 check_for_locks(struct file
*filp
, struct nfs4_stateowner
*lowner
)
2906 struct file_lock
**flpp
;
2907 struct inode
*inode
= filp
->f_path
.dentry
->d_inode
;
2911 for (flpp
= &inode
->i_flock
; *flpp
!= NULL
; flpp
= &(*flpp
)->fl_next
) {
2912 if ((*flpp
)->fl_owner
== (fl_owner_t
)lowner
) {
2923 nfsd4_release_lockowner(struct svc_rqst
*rqstp
,
2924 struct nfsd4_compound_state
*cstate
,
2925 struct nfsd4_release_lockowner
*rlockowner
)
2927 clientid_t
*clid
= &rlockowner
->rl_clientid
;
2928 struct nfs4_stateowner
*sop
;
2929 struct nfs4_stateid
*stp
;
2930 struct xdr_netobj
*owner
= &rlockowner
->rl_owner
;
2931 struct list_head matches
;
2935 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
2936 clid
->cl_boot
, clid
->cl_id
);
2938 /* XXX check for lease expiration */
2940 status
= nfserr_stale_clientid
;
2941 if (STALE_CLIENTID(clid
))
2946 status
= nfserr_locks_held
;
2947 /* XXX: we're doing a linear search through all the lockowners.
2948 * Yipes! For now we'll just hope clients aren't really using
2949 * release_lockowner much, but eventually we have to fix these
2950 * data structures. */
2951 INIT_LIST_HEAD(&matches
);
2952 for (i
= 0; i
< LOCK_HASH_SIZE
; i
++) {
2953 list_for_each_entry(sop
, &lock_ownerid_hashtbl
[i
], so_idhash
) {
2954 if (!same_owner_str(sop
, owner
, clid
))
2956 list_for_each_entry(stp
, &sop
->so_stateids
,
2958 if (check_for_locks(stp
->st_vfs_file
, sop
))
2960 /* Note: so_perclient unused for lockowners,
2961 * so it's OK to fool with here. */
2962 list_add(&sop
->so_perclient
, &matches
);
2966 /* Clients probably won't expect us to return with some (but not all)
2967 * of the lockowner state released; so don't release any until all
2968 * have been checked. */
2970 while (!list_empty(&matches
)) {
2971 sop
= list_entry(matches
.next
, struct nfs4_stateowner
,
2973 /* unhash_stateowner deletes so_perclient only
2974 * for openowners. */
2975 list_del(&sop
->so_perclient
);
2976 release_stateowner(sop
);
2979 nfs4_unlock_state();
2983 static inline struct nfs4_client_reclaim
*
2986 return kmalloc(sizeof(struct nfs4_client_reclaim
), GFP_KERNEL
);
2990 nfs4_has_reclaimed_state(const char *name
)
2992 unsigned int strhashval
= clientstr_hashval(name
);
2993 struct nfs4_client
*clp
;
2995 clp
= find_confirmed_client_by_str(name
, strhashval
);
3000 * failure => all reset bets are off, nfserr_no_grace...
3003 nfs4_client_to_reclaim(const char *name
)
3005 unsigned int strhashval
;
3006 struct nfs4_client_reclaim
*crp
= NULL
;
3008 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN
, name
);
3009 crp
= alloc_reclaim();
3012 strhashval
= clientstr_hashval(name
);
3013 INIT_LIST_HEAD(&crp
->cr_strhash
);
3014 list_add(&crp
->cr_strhash
, &reclaim_str_hashtbl
[strhashval
]);
3015 memcpy(crp
->cr_recdir
, name
, HEXDIR_LEN
);
3016 reclaim_str_hashtbl_size
++;
3021 nfs4_release_reclaim(void)
3023 struct nfs4_client_reclaim
*crp
= NULL
;
3026 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
3027 while (!list_empty(&reclaim_str_hashtbl
[i
])) {
3028 crp
= list_entry(reclaim_str_hashtbl
[i
].next
,
3029 struct nfs4_client_reclaim
, cr_strhash
);
3030 list_del(&crp
->cr_strhash
);
3032 reclaim_str_hashtbl_size
--;
3035 BUG_ON(reclaim_str_hashtbl_size
);
3039 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
3040 static struct nfs4_client_reclaim
*
3041 nfs4_find_reclaim_client(clientid_t
*clid
)
3043 unsigned int strhashval
;
3044 struct nfs4_client
*clp
;
3045 struct nfs4_client_reclaim
*crp
= NULL
;
3048 /* find clientid in conf_id_hashtbl */
3049 clp
= find_confirmed_client(clid
);
3053 dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n",
3054 clp
->cl_name
.len
, clp
->cl_name
.data
,
3057 /* find clp->cl_name in reclaim_str_hashtbl */
3058 strhashval
= clientstr_hashval(clp
->cl_recdir
);
3059 list_for_each_entry(crp
, &reclaim_str_hashtbl
[strhashval
], cr_strhash
) {
3060 if (same_name(crp
->cr_recdir
, clp
->cl_recdir
)) {
3068 * Called from OPEN. Look for clientid in reclaim list.
3071 nfs4_check_open_reclaim(clientid_t
*clid
)
3073 return nfs4_find_reclaim_client(clid
) ? nfs_ok
: nfserr_reclaim_bad
;
3076 /* initialization to perform at module load time: */
3079 nfs4_state_init(void)
3083 status
= nfsd4_init_slabs();
3086 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
3087 INIT_LIST_HEAD(&conf_id_hashtbl
[i
]);
3088 INIT_LIST_HEAD(&conf_str_hashtbl
[i
]);
3089 INIT_LIST_HEAD(&unconf_str_hashtbl
[i
]);
3090 INIT_LIST_HEAD(&unconf_id_hashtbl
[i
]);
3092 for (i
= 0; i
< FILE_HASH_SIZE
; i
++) {
3093 INIT_LIST_HEAD(&file_hashtbl
[i
]);
3095 for (i
= 0; i
< OWNER_HASH_SIZE
; i
++) {
3096 INIT_LIST_HEAD(&ownerstr_hashtbl
[i
]);
3097 INIT_LIST_HEAD(&ownerid_hashtbl
[i
]);
3099 for (i
= 0; i
< STATEID_HASH_SIZE
; i
++) {
3100 INIT_LIST_HEAD(&stateid_hashtbl
[i
]);
3101 INIT_LIST_HEAD(&lockstateid_hashtbl
[i
]);
3103 for (i
= 0; i
< LOCK_HASH_SIZE
; i
++) {
3104 INIT_LIST_HEAD(&lock_ownerid_hashtbl
[i
]);
3105 INIT_LIST_HEAD(&lock_ownerstr_hashtbl
[i
]);
3107 memset(&onestateid
, ~0, sizeof(stateid_t
));
3108 INIT_LIST_HEAD(&close_lru
);
3109 INIT_LIST_HEAD(&client_lru
);
3110 INIT_LIST_HEAD(&del_recall_lru
);
3111 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++)
3112 INIT_LIST_HEAD(&reclaim_str_hashtbl
[i
]);
3113 reclaim_str_hashtbl_size
= 0;
3118 nfsd4_load_reboot_recovery_data(void)
3123 nfsd4_init_recdir(user_recovery_dirname
);
3124 status
= nfsd4_recdir_load();
3125 nfs4_unlock_state();
3127 printk("NFSD: Failure reading reboot recovery data\n");
3131 get_nfs4_grace_period(void)
3133 return max(user_lease_time
, lease_time
) * HZ
;
3137 * Since the lifetime of a delegation isn't limited to that of an open, a
3138 * client may quite reasonably hang on to a delegation as long as it has
3139 * the inode cached. This becomes an obvious problem the first time a
3140 * client's inode cache approaches the size of the server's total memory.
3142 * For now we avoid this problem by imposing a hard limit on the number
3143 * of delegations, which varies according to the server's memory size.
3146 set_max_delegations(void)
3149 * Allow at most 4 delegations per megabyte of RAM. Quick
3150 * estimates suggest that in the worst case (where every delegation
3151 * is for a different inode), a delegation could take about 1.5K,
3152 * giving a worst case usage of about 6% of memory.
3154 max_delegations
= nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT
);
3157 /* initialization to perform when the nfsd service is started: */
3160 __nfs4_state_start(void)
3162 unsigned long grace_time
;
3164 boot_time
= get_seconds();
3165 grace_time
= get_nfs_grace_period();
3166 lease_time
= user_lease_time
;
3168 printk(KERN_INFO
"NFSD: starting %ld-second grace period\n",
3170 laundry_wq
= create_singlethread_workqueue("nfsd4");
3171 queue_delayed_work(laundry_wq
, &laundromat_work
, grace_time
);
3172 set_max_delegations();
3176 nfs4_state_start(void)
3180 nfsd4_load_reboot_recovery_data();
3181 __nfs4_state_start();
3193 nfs4_lease_time(void)
3199 __nfs4_state_shutdown(void)
3202 struct nfs4_client
*clp
= NULL
;
3203 struct nfs4_delegation
*dp
= NULL
;
3204 struct list_head
*pos
, *next
, reaplist
;
3206 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
3207 while (!list_empty(&conf_id_hashtbl
[i
])) {
3208 clp
= list_entry(conf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
3211 while (!list_empty(&unconf_str_hashtbl
[i
])) {
3212 clp
= list_entry(unconf_str_hashtbl
[i
].next
, struct nfs4_client
, cl_strhash
);
3216 INIT_LIST_HEAD(&reaplist
);
3217 spin_lock(&recall_lock
);
3218 list_for_each_safe(pos
, next
, &del_recall_lru
) {
3219 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3220 list_move(&dp
->dl_recall_lru
, &reaplist
);
3222 spin_unlock(&recall_lock
);
3223 list_for_each_safe(pos
, next
, &reaplist
) {
3224 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3225 list_del_init(&dp
->dl_recall_lru
);
3226 unhash_delegation(dp
);
3229 nfsd4_shutdown_recdir();
3234 nfs4_state_shutdown(void)
3236 cancel_rearming_delayed_workqueue(laundry_wq
, &laundromat_work
);
3237 destroy_workqueue(laundry_wq
);
3239 nfs4_release_reclaim();
3240 __nfs4_state_shutdown();
3241 nfs4_unlock_state();
3245 nfs4_set_recdir(char *recdir
)
3248 strcpy(user_recovery_dirname
, recdir
);
3249 nfs4_unlock_state();
3253 * Change the NFSv4 recovery directory to recdir.
3256 nfs4_reset_recoverydir(char *recdir
)
3259 struct nameidata nd
;
3261 status
= path_lookup(recdir
, LOOKUP_FOLLOW
, &nd
);
3265 if (S_ISDIR(nd
.path
.dentry
->d_inode
->i_mode
)) {
3266 nfs4_set_recdir(recdir
);
3274 * Called when leasetime is changed.
3276 * The only way the protocol gives us to handle on-the-fly lease changes is to
3277 * simulate a reboot. Instead of doing that, we just wait till the next time
3278 * we start to register any changes in lease time. If the administrator
3279 * really wants to change the lease time *now*, they can go ahead and bring
3280 * nfsd down and then back up again after changing the lease time.
3283 nfs4_reset_lease(time_t leasetime
)
3286 user_lease_time
= leasetime
;