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/mount.h>
45 #include <linux/workqueue.h>
46 #include <linux/smp_lock.h>
47 #include <linux/kthread.h>
48 #include <linux/nfs4.h>
49 #include <linux/nfsd/state.h>
50 #include <linux/nfsd/xdr4.h>
51 #include <linux/namei.h>
52 #include <linux/swap.h>
53 #include <linux/mutex.h>
54 #include <linux/lockd/bind.h>
55 #include <linux/module.h>
57 #define NFSDDBG_FACILITY NFSDDBG_PROC
60 static time_t lease_time
= 90; /* default lease time */
61 static time_t user_lease_time
= 90;
62 static time_t boot_time
;
63 static int in_grace
= 1;
64 static u32 current_clientid
= 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 inline struct nfs4_client
*
344 alloc_client(struct xdr_netobj name
)
346 struct nfs4_client
*clp
;
348 if ((clp
= kzalloc(sizeof(struct nfs4_client
), GFP_KERNEL
))!= NULL
) {
349 if ((clp
->cl_name
.data
= kmalloc(name
.len
, GFP_KERNEL
)) != NULL
) {
350 memcpy(clp
->cl_name
.data
, name
.data
, name
.len
);
351 clp
->cl_name
.len
= name
.len
;
362 shutdown_callback_client(struct nfs4_client
*clp
)
364 struct rpc_clnt
*clnt
= clp
->cl_callback
.cb_client
;
366 /* shutdown rpc client, ending any outstanding recall rpcs */
368 clp
->cl_callback
.cb_client
= NULL
;
369 rpc_shutdown_client(clnt
);
374 free_client(struct nfs4_client
*clp
)
376 shutdown_callback_client(clp
);
377 if (clp
->cl_cred
.cr_group_info
)
378 put_group_info(clp
->cl_cred
.cr_group_info
);
379 kfree(clp
->cl_name
.data
);
384 put_nfs4_client(struct nfs4_client
*clp
)
386 if (atomic_dec_and_test(&clp
->cl_count
))
391 expire_client(struct nfs4_client
*clp
)
393 struct nfs4_stateowner
*sop
;
394 struct nfs4_delegation
*dp
;
395 struct list_head reaplist
;
397 dprintk("NFSD: expire_client cl_count %d\n",
398 atomic_read(&clp
->cl_count
));
400 INIT_LIST_HEAD(&reaplist
);
401 spin_lock(&recall_lock
);
402 while (!list_empty(&clp
->cl_delegations
)) {
403 dp
= list_entry(clp
->cl_delegations
.next
, struct nfs4_delegation
, dl_perclnt
);
404 dprintk("NFSD: expire client. dp %p, fp %p\n", dp
,
406 list_del_init(&dp
->dl_perclnt
);
407 list_move(&dp
->dl_recall_lru
, &reaplist
);
409 spin_unlock(&recall_lock
);
410 while (!list_empty(&reaplist
)) {
411 dp
= list_entry(reaplist
.next
, struct nfs4_delegation
, dl_recall_lru
);
412 list_del_init(&dp
->dl_recall_lru
);
413 unhash_delegation(dp
);
415 list_del(&clp
->cl_idhash
);
416 list_del(&clp
->cl_strhash
);
417 list_del(&clp
->cl_lru
);
418 while (!list_empty(&clp
->cl_openowners
)) {
419 sop
= list_entry(clp
->cl_openowners
.next
, struct nfs4_stateowner
, so_perclient
);
420 release_stateowner(sop
);
422 put_nfs4_client(clp
);
425 static struct nfs4_client
*
426 create_client(struct xdr_netobj name
, char *recdir
) {
427 struct nfs4_client
*clp
;
429 if (!(clp
= alloc_client(name
)))
431 memcpy(clp
->cl_recdir
, recdir
, HEXDIR_LEN
);
432 atomic_set(&clp
->cl_count
, 1);
433 atomic_set(&clp
->cl_callback
.cb_set
, 0);
434 INIT_LIST_HEAD(&clp
->cl_idhash
);
435 INIT_LIST_HEAD(&clp
->cl_strhash
);
436 INIT_LIST_HEAD(&clp
->cl_openowners
);
437 INIT_LIST_HEAD(&clp
->cl_delegations
);
438 INIT_LIST_HEAD(&clp
->cl_lru
);
444 copy_verf(struct nfs4_client
*target
, nfs4_verifier
*source
) {
445 memcpy(target
->cl_verifier
.data
, source
->data
, sizeof(target
->cl_verifier
.data
));
449 copy_clid(struct nfs4_client
*target
, struct nfs4_client
*source
) {
450 target
->cl_clientid
.cl_boot
= source
->cl_clientid
.cl_boot
;
451 target
->cl_clientid
.cl_id
= source
->cl_clientid
.cl_id
;
455 copy_cred(struct svc_cred
*target
, struct svc_cred
*source
) {
457 target
->cr_uid
= source
->cr_uid
;
458 target
->cr_gid
= source
->cr_gid
;
459 target
->cr_group_info
= source
->cr_group_info
;
460 get_group_info(target
->cr_group_info
);
464 same_name(const char *n1
, const char *n2
)
466 return 0 == memcmp(n1
, n2
, HEXDIR_LEN
);
470 same_verf(nfs4_verifier
*v1
, nfs4_verifier
*v2
)
472 return 0 == memcmp(v1
->data
, v2
->data
, sizeof(v1
->data
));
476 same_clid(clientid_t
*cl1
, clientid_t
*cl2
)
478 return (cl1
->cl_boot
== cl2
->cl_boot
) && (cl1
->cl_id
== cl2
->cl_id
);
481 /* XXX what about NGROUP */
483 same_creds(struct svc_cred
*cr1
, struct svc_cred
*cr2
)
485 return cr1
->cr_uid
== cr2
->cr_uid
;
489 gen_clid(struct nfs4_client
*clp
) {
490 clp
->cl_clientid
.cl_boot
= boot_time
;
491 clp
->cl_clientid
.cl_id
= current_clientid
++;
495 gen_confirm(struct nfs4_client
*clp
) {
500 p
= (u32
*)clp
->cl_confirm
.data
;
506 check_name(struct xdr_netobj name
) {
510 if (name
.len
> NFS4_OPAQUE_LIMIT
) {
511 dprintk("NFSD: check_name: name too long(%d)!\n", name
.len
);
518 add_to_unconfirmed(struct nfs4_client
*clp
, unsigned int strhashval
)
520 unsigned int idhashval
;
522 list_add(&clp
->cl_strhash
, &unconf_str_hashtbl
[strhashval
]);
523 idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
524 list_add(&clp
->cl_idhash
, &unconf_id_hashtbl
[idhashval
]);
525 list_add_tail(&clp
->cl_lru
, &client_lru
);
526 clp
->cl_time
= get_seconds();
530 move_to_confirmed(struct nfs4_client
*clp
)
532 unsigned int idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
533 unsigned int strhashval
;
535 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp
);
536 list_del_init(&clp
->cl_strhash
);
537 list_move(&clp
->cl_idhash
, &conf_id_hashtbl
[idhashval
]);
538 strhashval
= clientstr_hashval(clp
->cl_recdir
);
539 list_add(&clp
->cl_strhash
, &conf_str_hashtbl
[strhashval
]);
543 static struct nfs4_client
*
544 find_confirmed_client(clientid_t
*clid
)
546 struct nfs4_client
*clp
;
547 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
549 list_for_each_entry(clp
, &conf_id_hashtbl
[idhashval
], cl_idhash
) {
550 if (same_clid(&clp
->cl_clientid
, clid
))
556 static struct nfs4_client
*
557 find_unconfirmed_client(clientid_t
*clid
)
559 struct nfs4_client
*clp
;
560 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
562 list_for_each_entry(clp
, &unconf_id_hashtbl
[idhashval
], cl_idhash
) {
563 if (same_clid(&clp
->cl_clientid
, clid
))
569 static struct nfs4_client
*
570 find_confirmed_client_by_str(const char *dname
, unsigned int hashval
)
572 struct nfs4_client
*clp
;
574 list_for_each_entry(clp
, &conf_str_hashtbl
[hashval
], cl_strhash
) {
575 if (same_name(clp
->cl_recdir
, dname
))
581 static struct nfs4_client
*
582 find_unconfirmed_client_by_str(const char *dname
, unsigned int hashval
)
584 struct nfs4_client
*clp
;
586 list_for_each_entry(clp
, &unconf_str_hashtbl
[hashval
], cl_strhash
) {
587 if (same_name(clp
->cl_recdir
, dname
))
593 /* a helper function for parse_callback */
595 parse_octet(unsigned int *lenp
, char **addrp
)
597 unsigned int len
= *lenp
;
609 if ((c
< '0') || (c
> '9')) {
615 n
= (n
* 10) + (c
- '0');
626 /* parse and set the setclientid ipv4 callback address */
628 parse_ipv4(unsigned int addr_len
, char *addr_val
, unsigned int *cbaddrp
, unsigned short *cbportp
)
633 u32 addrlen
= addr_len
;
634 char *addr
= addr_val
;
639 for(i
= 4; i
> 0 ; i
--) {
640 if ((temp
= parse_octet(&addrlen
, &addr
)) < 0) {
643 cbaddr
|= (temp
<< shift
);
651 for(i
= 2; i
> 0 ; i
--) {
652 if ((temp
= parse_octet(&addrlen
, &addr
)) < 0) {
655 cbport
|= (temp
<< shift
);
664 gen_callback(struct nfs4_client
*clp
, struct nfsd4_setclientid
*se
)
666 struct nfs4_callback
*cb
= &clp
->cl_callback
;
668 /* Currently, we only support tcp for the callback channel */
669 if ((se
->se_callback_netid_len
!= 3) || memcmp((char *)se
->se_callback_netid_val
, "tcp", 3))
672 if ( !(parse_ipv4(se
->se_callback_addr_len
, se
->se_callback_addr_val
,
673 &cb
->cb_addr
, &cb
->cb_port
)))
675 cb
->cb_prog
= se
->se_callback_prog
;
676 cb
->cb_ident
= se
->se_callback_ident
;
679 dprintk(KERN_INFO
"NFSD: this client (clientid %08x/%08x) "
680 "will not receive delegations\n",
681 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
687 * RFC 3010 has a complex implmentation description of processing a
688 * SETCLIENTID request consisting of 5 bullets, labeled as
689 * CASE0 - CASE4 below.
692 * callback information will be processed in a future patch
694 * an unconfirmed record is added when:
695 * NORMAL (part of CASE 4): there is no confirmed nor unconfirmed record.
696 * CASE 1: confirmed record found with matching name, principal,
697 * verifier, and clientid.
698 * CASE 2: confirmed record found with matching name, principal,
699 * and there is no unconfirmed record with matching
702 * an unconfirmed record is replaced when:
703 * CASE 3: confirmed record found with matching name, principal,
704 * and an unconfirmed record is found with matching
705 * name, principal, and with clientid and
706 * confirm that does not match the confirmed record.
707 * CASE 4: there is no confirmed record with matching name and
708 * principal. there is an unconfirmed record with
709 * matching name, principal.
711 * an unconfirmed record is deleted when:
712 * CASE 1: an unconfirmed record that matches input name, verifier,
713 * and confirmed clientid.
714 * CASE 4: any unconfirmed records with matching name and principal
715 * that exist after an unconfirmed record has been replaced
716 * as described above.
720 nfsd4_setclientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
721 struct nfsd4_setclientid
*setclid
)
723 struct sockaddr_in
*sin
= svc_addr_in(rqstp
);
724 struct xdr_netobj clname
= {
725 .len
= setclid
->se_namelen
,
726 .data
= setclid
->se_name
,
728 nfs4_verifier clverifier
= setclid
->se_verf
;
729 unsigned int strhashval
;
730 struct nfs4_client
*conf
, *unconf
, *new;
732 char dname
[HEXDIR_LEN
];
734 if (!check_name(clname
))
737 status
= nfs4_make_rec_clidname(dname
, &clname
);
742 * XXX The Duplicate Request Cache (DRC) has been checked (??)
743 * We get here on a DRC miss.
746 strhashval
= clientstr_hashval(dname
);
749 conf
= find_confirmed_client_by_str(dname
, strhashval
);
753 * clname match, confirmed, different principal
754 * or different ip_address
756 status
= nfserr_clid_inuse
;
757 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)
758 || conf
->cl_addr
!= sin
->sin_addr
.s_addr
) {
759 dprintk("NFSD: setclientid: string in use by client"
760 "at %u.%u.%u.%u\n", NIPQUAD(conf
->cl_addr
));
764 unconf
= find_unconfirmed_client_by_str(dname
, strhashval
);
765 status
= nfserr_resource
;
769 * placed first, because it is the normal case.
772 expire_client(unconf
);
773 new = create_client(clname
, dname
);
777 } else if (same_verf(&conf
->cl_verifier
, &clverifier
)) {
780 * cl_name match, confirmed, principal match
781 * verifier match: probable callback update
783 * remove any unconfirmed nfs4_client with
784 * matching cl_name, cl_verifier, and cl_clientid
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
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.
797 expire_client(unconf
);
799 new = create_client(clname
, dname
);
802 copy_clid(new, conf
);
803 } else if (!unconf
) {
806 * clname match, confirmed, principal match
807 * verfier does not match
808 * no unconfirmed. create a new unconfirmed nfs4_client
809 * using input clverifier, clname, and callback info
810 * and generate a new cl_clientid and cl_confirm.
812 new = create_client(clname
, dname
);
816 } else if (!same_verf(&conf
->cl_confirm
, &unconf
->cl_confirm
)) {
819 * confirmed found (name, principal match)
820 * confirmed verifier does not match input clverifier
822 * unconfirmed found (name match)
823 * confirmed->cl_confirm != unconfirmed->cl_confirm
825 * remove unconfirmed.
827 * create an unconfirmed nfs4_client
828 * with same cl_name as existing confirmed nfs4_client,
829 * but with new callback info, new cl_clientid,
830 * new cl_verifier and a new cl_confirm
832 expire_client(unconf
);
833 new = create_client(clname
, dname
);
838 /* No cases hit !!! */
839 status
= nfserr_inval
;
843 copy_verf(new, &clverifier
);
844 new->cl_addr
= sin
->sin_addr
.s_addr
;
845 copy_cred(&new->cl_cred
, &rqstp
->rq_cred
);
847 gen_callback(new, setclid
);
848 add_to_unconfirmed(new, strhashval
);
849 setclid
->se_clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
850 setclid
->se_clientid
.cl_id
= new->cl_clientid
.cl_id
;
851 memcpy(setclid
->se_confirm
.data
, new->cl_confirm
.data
, sizeof(setclid
->se_confirm
.data
));
860 * RFC 3010 has a complex implmentation description of processing a
861 * SETCLIENTID_CONFIRM request consisting of 4 bullets describing
862 * processing on a DRC miss, labeled as CASE1 - CASE4 below.
864 * NOTE: callback information will be processed here in a future patch
867 nfsd4_setclientid_confirm(struct svc_rqst
*rqstp
,
868 struct nfsd4_compound_state
*cstate
,
869 struct nfsd4_setclientid_confirm
*setclientid_confirm
)
871 struct sockaddr_in
*sin
= svc_addr_in(rqstp
);
872 struct nfs4_client
*conf
, *unconf
;
873 nfs4_verifier confirm
= setclientid_confirm
->sc_confirm
;
874 clientid_t
* clid
= &setclientid_confirm
->sc_clientid
;
877 if (STALE_CLIENTID(clid
))
878 return nfserr_stale_clientid
;
880 * XXX The Duplicate Request Cache (DRC) has been checked (??)
881 * We get here on a DRC miss.
886 conf
= find_confirmed_client(clid
);
887 unconf
= find_unconfirmed_client(clid
);
889 status
= nfserr_clid_inuse
;
890 if (conf
&& conf
->cl_addr
!= sin
->sin_addr
.s_addr
)
892 if (unconf
&& unconf
->cl_addr
!= sin
->sin_addr
.s_addr
)
895 if ((conf
&& unconf
) &&
896 (same_verf(&unconf
->cl_confirm
, &confirm
)) &&
897 (same_verf(&conf
->cl_verifier
, &unconf
->cl_verifier
)) &&
898 (same_name(conf
->cl_recdir
,unconf
->cl_recdir
)) &&
899 (!same_verf(&conf
->cl_confirm
, &unconf
->cl_confirm
))) {
901 * unconf record that matches input clientid and input confirm.
902 * conf record that matches input clientid.
903 * conf and unconf records match names, verifiers
905 if (!same_creds(&conf
->cl_cred
, &unconf
->cl_cred
))
906 status
= nfserr_clid_inuse
;
908 /* XXX: We just turn off callbacks until we can handle
909 * change request correctly. */
910 atomic_set(&conf
->cl_callback
.cb_set
, 0);
912 nfsd4_remove_clid_dir(unconf
);
913 expire_client(unconf
);
917 } else if ((conf
&& !unconf
) ||
919 (!same_verf(&conf
->cl_verifier
, &unconf
->cl_verifier
) ||
920 !same_name(conf
->cl_recdir
, unconf
->cl_recdir
)))) {
922 * conf record that matches input clientid.
923 * if unconf record matches input clientid, then
924 * unconf->cl_name or unconf->cl_verifier don't match the
927 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
))
928 status
= nfserr_clid_inuse
;
931 } else if (!conf
&& unconf
932 && same_verf(&unconf
->cl_confirm
, &confirm
)) {
934 * conf record not found.
935 * unconf record found.
936 * unconf->cl_confirm matches input confirm
938 if (!same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
)) {
939 status
= nfserr_clid_inuse
;
942 clientstr_hashval(unconf
->cl_recdir
);
943 conf
= find_confirmed_client_by_str(unconf
->cl_recdir
,
946 nfsd4_remove_clid_dir(conf
);
949 move_to_confirmed(unconf
);
951 nfsd4_probe_callback(conf
);
954 } else if ((!conf
|| (conf
&& !same_verf(&conf
->cl_confirm
, &confirm
)))
955 && (!unconf
|| (unconf
&& !same_verf(&unconf
->cl_confirm
,
958 * conf record not found, or if conf, conf->cl_confirm does not
959 * match input confirm.
960 * unconf record not found, or if unconf, unconf->cl_confirm
961 * does not match input confirm.
963 status
= nfserr_stale_clientid
;
965 /* check that we have hit one of the cases...*/
966 status
= nfserr_clid_inuse
;
973 /* OPEN Share state helper functions */
974 static inline struct nfs4_file
*
975 alloc_init_file(struct inode
*ino
)
977 struct nfs4_file
*fp
;
978 unsigned int hashval
= file_hashval(ino
);
980 fp
= kmem_cache_alloc(file_slab
, GFP_KERNEL
);
982 kref_init(&fp
->fi_ref
);
983 INIT_LIST_HEAD(&fp
->fi_hash
);
984 INIT_LIST_HEAD(&fp
->fi_stateids
);
985 INIT_LIST_HEAD(&fp
->fi_delegations
);
986 list_add(&fp
->fi_hash
, &file_hashtbl
[hashval
]);
987 fp
->fi_inode
= igrab(ino
);
988 fp
->fi_id
= current_fileid
++;
989 fp
->fi_had_conflict
= false;
996 nfsd4_free_slab(struct kmem_cache
**slab
)
1000 kmem_cache_destroy(*slab
);
1005 nfsd4_free_slabs(void)
1007 nfsd4_free_slab(&stateowner_slab
);
1008 nfsd4_free_slab(&file_slab
);
1009 nfsd4_free_slab(&stateid_slab
);
1010 nfsd4_free_slab(&deleg_slab
);
1014 nfsd4_init_slabs(void)
1016 stateowner_slab
= kmem_cache_create("nfsd4_stateowners",
1017 sizeof(struct nfs4_stateowner
), 0, 0, NULL
);
1018 if (stateowner_slab
== NULL
)
1020 file_slab
= kmem_cache_create("nfsd4_files",
1021 sizeof(struct nfs4_file
), 0, 0, NULL
);
1022 if (file_slab
== NULL
)
1024 stateid_slab
= kmem_cache_create("nfsd4_stateids",
1025 sizeof(struct nfs4_stateid
), 0, 0, NULL
);
1026 if (stateid_slab
== NULL
)
1028 deleg_slab
= kmem_cache_create("nfsd4_delegations",
1029 sizeof(struct nfs4_delegation
), 0, 0, NULL
);
1030 if (deleg_slab
== NULL
)
1035 dprintk("nfsd4: out of memory while initializing nfsv4\n");
1040 nfs4_free_stateowner(struct kref
*kref
)
1042 struct nfs4_stateowner
*sop
=
1043 container_of(kref
, struct nfs4_stateowner
, so_ref
);
1044 kfree(sop
->so_owner
.data
);
1045 kmem_cache_free(stateowner_slab
, sop
);
1048 static inline struct nfs4_stateowner
*
1049 alloc_stateowner(struct xdr_netobj
*owner
)
1051 struct nfs4_stateowner
*sop
;
1053 if ((sop
= kmem_cache_alloc(stateowner_slab
, GFP_KERNEL
))) {
1054 if ((sop
->so_owner
.data
= kmalloc(owner
->len
, GFP_KERNEL
))) {
1055 memcpy(sop
->so_owner
.data
, owner
->data
, owner
->len
);
1056 sop
->so_owner
.len
= owner
->len
;
1057 kref_init(&sop
->so_ref
);
1060 kmem_cache_free(stateowner_slab
, sop
);
1065 static struct nfs4_stateowner
*
1066 alloc_init_open_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfsd4_open
*open
) {
1067 struct nfs4_stateowner
*sop
;
1068 struct nfs4_replay
*rp
;
1069 unsigned int idhashval
;
1071 if (!(sop
= alloc_stateowner(&open
->op_owner
)))
1073 idhashval
= ownerid_hashval(current_ownerid
);
1074 INIT_LIST_HEAD(&sop
->so_idhash
);
1075 INIT_LIST_HEAD(&sop
->so_strhash
);
1076 INIT_LIST_HEAD(&sop
->so_perclient
);
1077 INIT_LIST_HEAD(&sop
->so_stateids
);
1078 INIT_LIST_HEAD(&sop
->so_perstateid
); /* not used */
1079 INIT_LIST_HEAD(&sop
->so_close_lru
);
1081 list_add(&sop
->so_idhash
, &ownerid_hashtbl
[idhashval
]);
1082 list_add(&sop
->so_strhash
, &ownerstr_hashtbl
[strhashval
]);
1083 list_add(&sop
->so_perclient
, &clp
->cl_openowners
);
1084 sop
->so_is_open_owner
= 1;
1085 sop
->so_id
= current_ownerid
++;
1086 sop
->so_client
= clp
;
1087 sop
->so_seqid
= open
->op_seqid
;
1088 sop
->so_confirmed
= 0;
1089 rp
= &sop
->so_replay
;
1090 rp
->rp_status
= nfserr_serverfault
;
1092 rp
->rp_buf
= rp
->rp_ibuf
;
1097 release_stateid_lockowners(struct nfs4_stateid
*open_stp
)
1099 struct nfs4_stateowner
*lock_sop
;
1101 while (!list_empty(&open_stp
->st_lockowners
)) {
1102 lock_sop
= list_entry(open_stp
->st_lockowners
.next
,
1103 struct nfs4_stateowner
, so_perstateid
);
1104 /* list_del(&open_stp->st_lockowners); */
1105 BUG_ON(lock_sop
->so_is_open_owner
);
1106 release_stateowner(lock_sop
);
1111 unhash_stateowner(struct nfs4_stateowner
*sop
)
1113 struct nfs4_stateid
*stp
;
1115 list_del(&sop
->so_idhash
);
1116 list_del(&sop
->so_strhash
);
1117 if (sop
->so_is_open_owner
)
1118 list_del(&sop
->so_perclient
);
1119 list_del(&sop
->so_perstateid
);
1120 while (!list_empty(&sop
->so_stateids
)) {
1121 stp
= list_entry(sop
->so_stateids
.next
,
1122 struct nfs4_stateid
, st_perstateowner
);
1123 if (sop
->so_is_open_owner
)
1124 release_stateid(stp
, OPEN_STATE
);
1126 release_stateid(stp
, LOCK_STATE
);
1131 release_stateowner(struct nfs4_stateowner
*sop
)
1133 unhash_stateowner(sop
);
1134 list_del(&sop
->so_close_lru
);
1135 nfs4_put_stateowner(sop
);
1139 init_stateid(struct nfs4_stateid
*stp
, struct nfs4_file
*fp
, struct nfsd4_open
*open
) {
1140 struct nfs4_stateowner
*sop
= open
->op_stateowner
;
1141 unsigned int hashval
= stateid_hashval(sop
->so_id
, fp
->fi_id
);
1143 INIT_LIST_HEAD(&stp
->st_hash
);
1144 INIT_LIST_HEAD(&stp
->st_perstateowner
);
1145 INIT_LIST_HEAD(&stp
->st_lockowners
);
1146 INIT_LIST_HEAD(&stp
->st_perfile
);
1147 list_add(&stp
->st_hash
, &stateid_hashtbl
[hashval
]);
1148 list_add(&stp
->st_perstateowner
, &sop
->so_stateids
);
1149 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
1150 stp
->st_stateowner
= sop
;
1153 stp
->st_stateid
.si_boot
= boot_time
;
1154 stp
->st_stateid
.si_stateownerid
= sop
->so_id
;
1155 stp
->st_stateid
.si_fileid
= fp
->fi_id
;
1156 stp
->st_stateid
.si_generation
= 0;
1157 stp
->st_access_bmap
= 0;
1158 stp
->st_deny_bmap
= 0;
1159 __set_bit(open
->op_share_access
, &stp
->st_access_bmap
);
1160 __set_bit(open
->op_share_deny
, &stp
->st_deny_bmap
);
1161 stp
->st_openstp
= NULL
;
1165 release_stateid(struct nfs4_stateid
*stp
, int flags
)
1167 struct file
*filp
= stp
->st_vfs_file
;
1169 list_del(&stp
->st_hash
);
1170 list_del(&stp
->st_perfile
);
1171 list_del(&stp
->st_perstateowner
);
1172 if (flags
& OPEN_STATE
) {
1173 release_stateid_lockowners(stp
);
1174 stp
->st_vfs_file
= NULL
;
1176 } else if (flags
& LOCK_STATE
)
1177 locks_remove_posix(filp
, (fl_owner_t
) stp
->st_stateowner
);
1178 put_nfs4_file(stp
->st_file
);
1179 kmem_cache_free(stateid_slab
, stp
);
1183 move_to_close_lru(struct nfs4_stateowner
*sop
)
1185 dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop
);
1187 list_move_tail(&sop
->so_close_lru
, &close_lru
);
1188 sop
->so_time
= get_seconds();
1192 same_owner_str(struct nfs4_stateowner
*sop
, struct xdr_netobj
*owner
,
1195 return (sop
->so_owner
.len
== owner
->len
) &&
1196 0 == memcmp(sop
->so_owner
.data
, owner
->data
, owner
->len
) &&
1197 (sop
->so_client
->cl_clientid
.cl_id
== clid
->cl_id
);
1200 static struct nfs4_stateowner
*
1201 find_openstateowner_str(unsigned int hashval
, struct nfsd4_open
*open
)
1203 struct nfs4_stateowner
*so
= NULL
;
1205 list_for_each_entry(so
, &ownerstr_hashtbl
[hashval
], so_strhash
) {
1206 if (same_owner_str(so
, &open
->op_owner
, &open
->op_clientid
))
1212 /* search file_hashtbl[] for file */
1213 static struct nfs4_file
*
1214 find_file(struct inode
*ino
)
1216 unsigned int hashval
= file_hashval(ino
);
1217 struct nfs4_file
*fp
;
1219 list_for_each_entry(fp
, &file_hashtbl
[hashval
], fi_hash
) {
1220 if (fp
->fi_inode
== ino
) {
1228 static int access_valid(u32 x
)
1230 return (x
> 0 && x
< 4);
1233 static int deny_valid(u32 x
)
1235 return (x
>= 0 && x
< 5);
1239 set_access(unsigned int *access
, unsigned long bmap
) {
1243 for (i
= 1; i
< 4; i
++) {
1244 if (test_bit(i
, &bmap
))
1250 set_deny(unsigned int *deny
, unsigned long bmap
) {
1254 for (i
= 0; i
< 4; i
++) {
1255 if (test_bit(i
, &bmap
))
1261 test_share(struct nfs4_stateid
*stp
, struct nfsd4_open
*open
) {
1262 unsigned int access
, deny
;
1264 set_access(&access
, stp
->st_access_bmap
);
1265 set_deny(&deny
, stp
->st_deny_bmap
);
1266 if ((access
& open
->op_share_deny
) || (deny
& open
->op_share_access
))
1272 * Called to check deny when READ with all zero stateid or
1273 * WRITE with all zero or all one stateid
1276 nfs4_share_conflict(struct svc_fh
*current_fh
, unsigned int deny_type
)
1278 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
1279 struct nfs4_file
*fp
;
1280 struct nfs4_stateid
*stp
;
1283 dprintk("NFSD: nfs4_share_conflict\n");
1285 fp
= find_file(ino
);
1288 ret
= nfserr_locked
;
1289 /* Search for conflicting share reservations */
1290 list_for_each_entry(stp
, &fp
->fi_stateids
, st_perfile
) {
1291 if (test_bit(deny_type
, &stp
->st_deny_bmap
) ||
1292 test_bit(NFS4_SHARE_DENY_BOTH
, &stp
->st_deny_bmap
))
1302 nfs4_file_downgrade(struct file
*filp
, unsigned int share_access
)
1304 if (share_access
& NFS4_SHARE_ACCESS_WRITE
) {
1305 put_write_access(filp
->f_path
.dentry
->d_inode
);
1306 filp
->f_mode
= (filp
->f_mode
| FMODE_READ
) & ~FMODE_WRITE
;
1311 * Recall a delegation
1314 do_recall(void *__dp
)
1316 struct nfs4_delegation
*dp
= __dp
;
1318 dp
->dl_file
->fi_had_conflict
= true;
1319 nfsd4_cb_recall(dp
);
1324 * Spawn a thread to perform a recall on the delegation represented
1325 * by the lease (file_lock)
1327 * Called from break_lease() with lock_kernel() held.
1328 * Note: we assume break_lease will only call this *once* for any given
1332 void nfsd_break_deleg_cb(struct file_lock
*fl
)
1334 struct nfs4_delegation
*dp
= (struct nfs4_delegation
*)fl
->fl_owner
;
1335 struct task_struct
*t
;
1337 dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp
,fl
);
1341 /* We're assuming the state code never drops its reference
1342 * without first removing the lease. Since we're in this lease
1343 * callback (and since the lease code is serialized by the kernel
1344 * lock) we know the server hasn't removed the lease yet, we know
1345 * it's safe to take a reference: */
1346 atomic_inc(&dp
->dl_count
);
1347 atomic_inc(&dp
->dl_client
->cl_count
);
1349 spin_lock(&recall_lock
);
1350 list_add_tail(&dp
->dl_recall_lru
, &del_recall_lru
);
1351 spin_unlock(&recall_lock
);
1353 /* only place dl_time is set. protected by lock_kernel*/
1354 dp
->dl_time
= get_seconds();
1357 * We don't want the locks code to timeout the lease for us;
1358 * we'll remove it ourself if the delegation isn't returned
1361 fl
->fl_break_time
= 0;
1363 t
= kthread_run(do_recall
, dp
, "%s", "nfs4_cb_recall");
1365 struct nfs4_client
*clp
= dp
->dl_client
;
1367 printk(KERN_INFO
"NFSD: Callback thread failed for "
1368 "for client (clientid %08x/%08x)\n",
1369 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
1370 put_nfs4_client(dp
->dl_client
);
1371 nfs4_put_delegation(dp
);
1376 * The file_lock is being reapd.
1378 * Called by locks_free_lock() with lock_kernel() held.
1381 void nfsd_release_deleg_cb(struct file_lock
*fl
)
1383 struct nfs4_delegation
*dp
= (struct nfs4_delegation
*)fl
->fl_owner
;
1385 dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl
,dp
, atomic_read(&dp
->dl_count
));
1387 if (!(fl
->fl_flags
& FL_LEASE
) || !dp
)
1389 dp
->dl_flock
= NULL
;
1393 * Set the delegation file_lock back pointer.
1395 * Called from setlease() with lock_kernel() held.
1398 void nfsd_copy_lock_deleg_cb(struct file_lock
*new, struct file_lock
*fl
)
1400 struct nfs4_delegation
*dp
= (struct nfs4_delegation
*)new->fl_owner
;
1402 dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp
);
1409 * Called from setlease() with lock_kernel() held
1412 int nfsd_same_client_deleg_cb(struct file_lock
*onlist
, struct file_lock
*try)
1414 struct nfs4_delegation
*onlistd
=
1415 (struct nfs4_delegation
*)onlist
->fl_owner
;
1416 struct nfs4_delegation
*tryd
=
1417 (struct nfs4_delegation
*)try->fl_owner
;
1419 if (onlist
->fl_lmops
!= try->fl_lmops
)
1422 return onlistd
->dl_client
== tryd
->dl_client
;
1427 int nfsd_change_deleg_cb(struct file_lock
**onlist
, int arg
)
1430 return lease_modify(onlist
, arg
);
1435 static struct lock_manager_operations nfsd_lease_mng_ops
= {
1436 .fl_break
= nfsd_break_deleg_cb
,
1437 .fl_release_private
= nfsd_release_deleg_cb
,
1438 .fl_copy_lock
= nfsd_copy_lock_deleg_cb
,
1439 .fl_mylease
= nfsd_same_client_deleg_cb
,
1440 .fl_change
= nfsd_change_deleg_cb
,
1445 nfsd4_process_open1(struct nfsd4_open
*open
)
1447 clientid_t
*clientid
= &open
->op_clientid
;
1448 struct nfs4_client
*clp
= NULL
;
1449 unsigned int strhashval
;
1450 struct nfs4_stateowner
*sop
= NULL
;
1452 if (!check_name(open
->op_owner
))
1453 return nfserr_inval
;
1455 if (STALE_CLIENTID(&open
->op_clientid
))
1456 return nfserr_stale_clientid
;
1458 strhashval
= ownerstr_hashval(clientid
->cl_id
, open
->op_owner
);
1459 sop
= find_openstateowner_str(strhashval
, open
);
1460 open
->op_stateowner
= sop
;
1462 /* Make sure the client's lease hasn't expired. */
1463 clp
= find_confirmed_client(clientid
);
1465 return nfserr_expired
;
1468 if (!sop
->so_confirmed
) {
1469 /* Replace unconfirmed owners without checking for replay. */
1470 clp
= sop
->so_client
;
1471 release_stateowner(sop
);
1472 open
->op_stateowner
= NULL
;
1475 if (open
->op_seqid
== sop
->so_seqid
- 1) {
1476 if (sop
->so_replay
.rp_buflen
)
1477 return nfserr_replay_me
;
1478 /* The original OPEN failed so spectacularly
1479 * that we don't even have replay data saved!
1480 * Therefore, we have no choice but to continue
1481 * processing this OPEN; presumably, we'll
1482 * fail again for the same reason.
1484 dprintk("nfsd4_process_open1: replay with no replay cache\n");
1487 if (open
->op_seqid
!= sop
->so_seqid
)
1488 return nfserr_bad_seqid
;
1490 if (open
->op_stateowner
== NULL
) {
1491 sop
= alloc_init_open_stateowner(strhashval
, clp
, open
);
1493 return nfserr_resource
;
1494 open
->op_stateowner
= sop
;
1496 list_del_init(&sop
->so_close_lru
);
1497 renew_client(sop
->so_client
);
1501 static inline __be32
1502 nfs4_check_delegmode(struct nfs4_delegation
*dp
, int flags
)
1504 if ((flags
& WR_STATE
) && (dp
->dl_type
== NFS4_OPEN_DELEGATE_READ
))
1505 return nfserr_openmode
;
1510 static struct nfs4_delegation
*
1511 find_delegation_file(struct nfs4_file
*fp
, stateid_t
*stid
)
1513 struct nfs4_delegation
*dp
;
1515 list_for_each_entry(dp
, &fp
->fi_delegations
, dl_perfile
) {
1516 if (dp
->dl_stateid
.si_stateownerid
== stid
->si_stateownerid
)
1523 nfs4_check_deleg(struct nfs4_file
*fp
, struct nfsd4_open
*open
,
1524 struct nfs4_delegation
**dp
)
1527 __be32 status
= nfserr_bad_stateid
;
1529 *dp
= find_delegation_file(fp
, &open
->op_delegate_stateid
);
1532 flags
= open
->op_share_access
== NFS4_SHARE_ACCESS_READ
?
1533 RD_STATE
: WR_STATE
;
1534 status
= nfs4_check_delegmode(*dp
, flags
);
1538 if (open
->op_claim_type
!= NFS4_OPEN_CLAIM_DELEGATE_CUR
)
1542 open
->op_stateowner
->so_confirmed
= 1;
1547 nfs4_check_open(struct nfs4_file
*fp
, struct nfsd4_open
*open
, struct nfs4_stateid
**stpp
)
1549 struct nfs4_stateid
*local
;
1550 __be32 status
= nfserr_share_denied
;
1551 struct nfs4_stateowner
*sop
= open
->op_stateowner
;
1553 list_for_each_entry(local
, &fp
->fi_stateids
, st_perfile
) {
1554 /* ignore lock owners */
1555 if (local
->st_stateowner
->so_is_open_owner
== 0)
1557 /* remember if we have seen this open owner */
1558 if (local
->st_stateowner
== sop
)
1560 /* check for conflicting share reservations */
1561 if (!test_share(local
, open
))
1569 static inline struct nfs4_stateid
*
1570 nfs4_alloc_stateid(void)
1572 return kmem_cache_alloc(stateid_slab
, GFP_KERNEL
);
1576 nfs4_new_open(struct svc_rqst
*rqstp
, struct nfs4_stateid
**stpp
,
1577 struct nfs4_delegation
*dp
,
1578 struct svc_fh
*cur_fh
, int flags
)
1580 struct nfs4_stateid
*stp
;
1582 stp
= nfs4_alloc_stateid();
1584 return nfserr_resource
;
1587 get_file(dp
->dl_vfs_file
);
1588 stp
->st_vfs_file
= dp
->dl_vfs_file
;
1591 status
= nfsd_open(rqstp
, cur_fh
, S_IFREG
, flags
,
1594 if (status
== nfserr_dropit
)
1595 status
= nfserr_jukebox
;
1596 kmem_cache_free(stateid_slab
, stp
);
1604 static inline __be32
1605 nfsd4_truncate(struct svc_rqst
*rqstp
, struct svc_fh
*fh
,
1606 struct nfsd4_open
*open
)
1608 struct iattr iattr
= {
1609 .ia_valid
= ATTR_SIZE
,
1612 if (!open
->op_truncate
)
1614 if (!(open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
))
1615 return nfserr_inval
;
1616 return nfsd_setattr(rqstp
, fh
, &iattr
, 0, (time_t)0);
1620 nfs4_upgrade_open(struct svc_rqst
*rqstp
, struct svc_fh
*cur_fh
, struct nfs4_stateid
*stp
, struct nfsd4_open
*open
)
1622 struct file
*filp
= stp
->st_vfs_file
;
1623 struct inode
*inode
= filp
->f_path
.dentry
->d_inode
;
1624 unsigned int share_access
, new_writer
;
1627 set_access(&share_access
, stp
->st_access_bmap
);
1628 new_writer
= (~share_access
) & open
->op_share_access
1629 & NFS4_SHARE_ACCESS_WRITE
;
1632 int err
= get_write_access(inode
);
1634 return nfserrno(err
);
1636 status
= nfsd4_truncate(rqstp
, cur_fh
, open
);
1639 put_write_access(inode
);
1642 /* remember the open */
1643 filp
->f_mode
|= open
->op_share_access
;
1644 set_bit(open
->op_share_access
, &stp
->st_access_bmap
);
1645 set_bit(open
->op_share_deny
, &stp
->st_deny_bmap
);
1652 nfs4_set_claim_prev(struct nfsd4_open
*open
)
1654 open
->op_stateowner
->so_confirmed
= 1;
1655 open
->op_stateowner
->so_client
->cl_firststate
= 1;
1659 * Attempt to hand out a delegation.
1662 nfs4_open_delegation(struct svc_fh
*fh
, struct nfsd4_open
*open
, struct nfs4_stateid
*stp
)
1664 struct nfs4_delegation
*dp
;
1665 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
1666 struct nfs4_callback
*cb
= &sop
->so_client
->cl_callback
;
1667 struct file_lock fl
, *flp
= &fl
;
1668 int status
, flag
= 0;
1670 flag
= NFS4_OPEN_DELEGATE_NONE
;
1671 open
->op_recall
= 0;
1672 switch (open
->op_claim_type
) {
1673 case NFS4_OPEN_CLAIM_PREVIOUS
:
1674 if (!atomic_read(&cb
->cb_set
))
1675 open
->op_recall
= 1;
1676 flag
= open
->op_delegate_type
;
1677 if (flag
== NFS4_OPEN_DELEGATE_NONE
)
1680 case NFS4_OPEN_CLAIM_NULL
:
1681 /* Let's not give out any delegations till everyone's
1682 * had the chance to reclaim theirs.... */
1683 if (nfs4_in_grace())
1685 if (!atomic_read(&cb
->cb_set
) || !sop
->so_confirmed
)
1687 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
1688 flag
= NFS4_OPEN_DELEGATE_WRITE
;
1690 flag
= NFS4_OPEN_DELEGATE_READ
;
1696 dp
= alloc_init_deleg(sop
->so_client
, stp
, fh
, flag
);
1698 flag
= NFS4_OPEN_DELEGATE_NONE
;
1701 locks_init_lock(&fl
);
1702 fl
.fl_lmops
= &nfsd_lease_mng_ops
;
1703 fl
.fl_flags
= FL_LEASE
;
1704 fl
.fl_end
= OFFSET_MAX
;
1705 fl
.fl_owner
= (fl_owner_t
)dp
;
1706 fl
.fl_file
= stp
->st_vfs_file
;
1707 fl
.fl_pid
= current
->tgid
;
1709 /* vfs_setlease checks to see if delegation should be handed out.
1710 * the lock_manager callbacks fl_mylease and fl_change are used
1712 if ((status
= vfs_setlease(stp
->st_vfs_file
,
1713 flag
== NFS4_OPEN_DELEGATE_READ
? F_RDLCK
: F_WRLCK
, &flp
))) {
1714 dprintk("NFSD: setlease failed [%d], no delegation\n", status
);
1715 unhash_delegation(dp
);
1716 flag
= NFS4_OPEN_DELEGATE_NONE
;
1720 memcpy(&open
->op_delegate_stateid
, &dp
->dl_stateid
, sizeof(dp
->dl_stateid
));
1722 dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n",
1723 dp
->dl_stateid
.si_boot
,
1724 dp
->dl_stateid
.si_stateownerid
,
1725 dp
->dl_stateid
.si_fileid
,
1726 dp
->dl_stateid
.si_generation
);
1728 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
1729 && flag
== NFS4_OPEN_DELEGATE_NONE
1730 && open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_NONE
)
1731 dprintk("NFSD: WARNING: refusing delegation reclaim\n");
1732 open
->op_delegate_type
= flag
;
1736 * called with nfs4_lock_state() held.
1739 nfsd4_process_open2(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
1741 struct nfs4_file
*fp
= NULL
;
1742 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
1743 struct nfs4_stateid
*stp
= NULL
;
1744 struct nfs4_delegation
*dp
= NULL
;
1747 status
= nfserr_inval
;
1748 if (!access_valid(open
->op_share_access
)
1749 || !deny_valid(open
->op_share_deny
))
1752 * Lookup file; if found, lookup stateid and check open request,
1753 * and check for delegations in the process of being recalled.
1754 * If not found, create the nfs4_file struct
1756 fp
= find_file(ino
);
1758 if ((status
= nfs4_check_open(fp
, open
, &stp
)))
1760 status
= nfs4_check_deleg(fp
, open
, &dp
);
1764 status
= nfserr_bad_stateid
;
1765 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
)
1767 status
= nfserr_resource
;
1768 fp
= alloc_init_file(ino
);
1774 * OPEN the file, or upgrade an existing OPEN.
1775 * If truncate fails, the OPEN fails.
1778 /* Stateid was found, this is an OPEN upgrade */
1779 status
= nfs4_upgrade_open(rqstp
, current_fh
, stp
, open
);
1782 update_stateid(&stp
->st_stateid
);
1784 /* Stateid was not found, this is a new OPEN */
1786 if (open
->op_share_access
& NFS4_SHARE_ACCESS_READ
)
1788 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
1790 status
= nfs4_new_open(rqstp
, &stp
, dp
, current_fh
, flags
);
1793 init_stateid(stp
, fp
, open
);
1794 status
= nfsd4_truncate(rqstp
, current_fh
, open
);
1796 release_stateid(stp
, OPEN_STATE
);
1800 memcpy(&open
->op_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
1803 * Attempt to hand out a delegation. No error return, because the
1804 * OPEN succeeds even if we fail.
1806 nfs4_open_delegation(current_fh
, open
, stp
);
1810 dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n",
1811 stp
->st_stateid
.si_boot
, stp
->st_stateid
.si_stateownerid
,
1812 stp
->st_stateid
.si_fileid
, stp
->st_stateid
.si_generation
);
1816 if (status
== 0 && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
1817 nfs4_set_claim_prev(open
);
1819 * To finish the open response, we just need to set the rflags.
1821 open
->op_rflags
= NFS4_OPEN_RESULT_LOCKTYPE_POSIX
;
1822 if (!open
->op_stateowner
->so_confirmed
)
1823 open
->op_rflags
|= NFS4_OPEN_RESULT_CONFIRM
;
1828 static struct workqueue_struct
*laundry_wq
;
1829 static void laundromat_main(struct work_struct
*);
1830 static DECLARE_DELAYED_WORK(laundromat_work
, laundromat_main
);
1833 nfsd4_renew(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
1836 struct nfs4_client
*clp
;
1840 dprintk("process_renew(%08x/%08x): starting\n",
1841 clid
->cl_boot
, clid
->cl_id
);
1842 status
= nfserr_stale_clientid
;
1843 if (STALE_CLIENTID(clid
))
1845 clp
= find_confirmed_client(clid
);
1846 status
= nfserr_expired
;
1848 /* We assume the client took too long to RENEW. */
1849 dprintk("nfsd4_renew: clientid not found!\n");
1853 status
= nfserr_cb_path_down
;
1854 if (!list_empty(&clp
->cl_delegations
)
1855 && !atomic_read(&clp
->cl_callback
.cb_set
))
1859 nfs4_unlock_state();
1866 dprintk("NFSD: end of grace period\n");
1867 nfsd4_recdir_purge_old();
1872 nfs4_laundromat(void)
1874 struct nfs4_client
*clp
;
1875 struct nfs4_stateowner
*sop
;
1876 struct nfs4_delegation
*dp
;
1877 struct list_head
*pos
, *next
, reaplist
;
1878 time_t cutoff
= get_seconds() - NFSD_LEASE_TIME
;
1879 time_t t
, clientid_val
= NFSD_LEASE_TIME
;
1880 time_t u
, test_val
= NFSD_LEASE_TIME
;
1884 dprintk("NFSD: laundromat service - starting\n");
1887 list_for_each_safe(pos
, next
, &client_lru
) {
1888 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
1889 if (time_after((unsigned long)clp
->cl_time
, (unsigned long)cutoff
)) {
1890 t
= clp
->cl_time
- cutoff
;
1891 if (clientid_val
> t
)
1895 dprintk("NFSD: purging unused client (clientid %08x)\n",
1896 clp
->cl_clientid
.cl_id
);
1897 nfsd4_remove_clid_dir(clp
);
1900 INIT_LIST_HEAD(&reaplist
);
1901 spin_lock(&recall_lock
);
1902 list_for_each_safe(pos
, next
, &del_recall_lru
) {
1903 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
1904 if (time_after((unsigned long)dp
->dl_time
, (unsigned long)cutoff
)) {
1905 u
= dp
->dl_time
- cutoff
;
1910 dprintk("NFSD: purging unused delegation dp %p, fp %p\n",
1912 list_move(&dp
->dl_recall_lru
, &reaplist
);
1914 spin_unlock(&recall_lock
);
1915 list_for_each_safe(pos
, next
, &reaplist
) {
1916 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
1917 list_del_init(&dp
->dl_recall_lru
);
1918 unhash_delegation(dp
);
1920 test_val
= NFSD_LEASE_TIME
;
1921 list_for_each_safe(pos
, next
, &close_lru
) {
1922 sop
= list_entry(pos
, struct nfs4_stateowner
, so_close_lru
);
1923 if (time_after((unsigned long)sop
->so_time
, (unsigned long)cutoff
)) {
1924 u
= sop
->so_time
- cutoff
;
1929 dprintk("NFSD: purging unused open stateowner (so_id %d)\n",
1931 release_stateowner(sop
);
1933 if (clientid_val
< NFSD_LAUNDROMAT_MINTIMEOUT
)
1934 clientid_val
= NFSD_LAUNDROMAT_MINTIMEOUT
;
1935 nfs4_unlock_state();
1936 return clientid_val
;
1940 laundromat_main(struct work_struct
*not_used
)
1944 t
= nfs4_laundromat();
1945 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t
);
1946 queue_delayed_work(laundry_wq
, &laundromat_work
, t
*HZ
);
1949 static struct nfs4_stateowner
*
1950 search_close_lru(u32 st_id
, int flags
)
1952 struct nfs4_stateowner
*local
= NULL
;
1954 if (flags
& CLOSE_STATE
) {
1955 list_for_each_entry(local
, &close_lru
, so_close_lru
) {
1956 if (local
->so_id
== st_id
)
1964 nfs4_check_fh(struct svc_fh
*fhp
, struct nfs4_stateid
*stp
)
1966 return fhp
->fh_dentry
->d_inode
!= stp
->st_vfs_file
->f_path
.dentry
->d_inode
;
1970 STALE_STATEID(stateid_t
*stateid
)
1972 if (stateid
->si_boot
== boot_time
)
1974 dprintk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n",
1975 stateid
->si_boot
, stateid
->si_stateownerid
, stateid
->si_fileid
,
1976 stateid
->si_generation
);
1981 access_permit_read(unsigned long access_bmap
)
1983 return test_bit(NFS4_SHARE_ACCESS_READ
, &access_bmap
) ||
1984 test_bit(NFS4_SHARE_ACCESS_BOTH
, &access_bmap
) ||
1985 test_bit(NFS4_SHARE_ACCESS_WRITE
, &access_bmap
);
1989 access_permit_write(unsigned long access_bmap
)
1991 return test_bit(NFS4_SHARE_ACCESS_WRITE
, &access_bmap
) ||
1992 test_bit(NFS4_SHARE_ACCESS_BOTH
, &access_bmap
);
1996 __be32
nfs4_check_openmode(struct nfs4_stateid
*stp
, int flags
)
1998 __be32 status
= nfserr_openmode
;
2000 if ((flags
& WR_STATE
) && (!access_permit_write(stp
->st_access_bmap
)))
2002 if ((flags
& RD_STATE
) && (!access_permit_read(stp
->st_access_bmap
)))
2009 static inline __be32
2010 check_special_stateids(svc_fh
*current_fh
, stateid_t
*stateid
, int flags
)
2012 /* Trying to call delegreturn with a special stateid? Yuch: */
2013 if (!(flags
& (RD_STATE
| WR_STATE
)))
2014 return nfserr_bad_stateid
;
2015 else if (ONE_STATEID(stateid
) && (flags
& RD_STATE
))
2017 else if (nfs4_in_grace()) {
2018 /* Answer in remaining cases depends on existance of
2019 * conflicting state; so we must wait out the grace period. */
2020 return nfserr_grace
;
2021 } else if (flags
& WR_STATE
)
2022 return nfs4_share_conflict(current_fh
,
2023 NFS4_SHARE_DENY_WRITE
);
2024 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
2025 return nfs4_share_conflict(current_fh
,
2026 NFS4_SHARE_DENY_READ
);
2030 * Allow READ/WRITE during grace period on recovered state only for files
2031 * that are not able to provide mandatory locking.
2034 io_during_grace_disallowed(struct inode
*inode
, int flags
)
2036 return nfs4_in_grace() && (flags
& (RD_STATE
| WR_STATE
))
2037 && mandatory_lock(inode
);
2041 * Checks for stateid operations
2044 nfs4_preprocess_stateid_op(struct svc_fh
*current_fh
, stateid_t
*stateid
, int flags
, struct file
**filpp
)
2046 struct nfs4_stateid
*stp
= NULL
;
2047 struct nfs4_delegation
*dp
= NULL
;
2049 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
2052 dprintk("NFSD: preprocess_stateid_op: stateid = (%08x/%08x/%08x/%08x)\n",
2053 stateid
->si_boot
, stateid
->si_stateownerid
,
2054 stateid
->si_fileid
, stateid
->si_generation
);
2058 if (io_during_grace_disallowed(ino
, flags
))
2059 return nfserr_grace
;
2061 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
2062 return check_special_stateids(current_fh
, stateid
, flags
);
2065 status
= nfserr_stale_stateid
;
2066 if (STALE_STATEID(stateid
))
2070 status
= nfserr_bad_stateid
;
2071 if (!stateid
->si_fileid
) { /* delegation stateid */
2072 if(!(dp
= find_delegation_stateid(ino
, stateid
))) {
2073 dprintk("NFSD: delegation stateid not found\n");
2076 stidp
= &dp
->dl_stateid
;
2077 } else { /* open or lock stateid */
2078 if (!(stp
= find_stateid(stateid
, flags
))) {
2079 dprintk("NFSD: open or lock stateid not found\n");
2082 if ((flags
& CHECK_FH
) && nfs4_check_fh(current_fh
, stp
))
2084 if (!stp
->st_stateowner
->so_confirmed
)
2086 stidp
= &stp
->st_stateid
;
2088 if (stateid
->si_generation
> stidp
->si_generation
)
2092 status
= nfserr_old_stateid
;
2093 if (stateid
->si_generation
< stidp
->si_generation
)
2096 if ((status
= nfs4_check_openmode(stp
,flags
)))
2098 renew_client(stp
->st_stateowner
->so_client
);
2100 *filpp
= stp
->st_vfs_file
;
2102 if ((status
= nfs4_check_delegmode(dp
, flags
)))
2104 renew_client(dp
->dl_client
);
2105 if (flags
& DELEG_RET
)
2106 unhash_delegation(dp
);
2108 *filpp
= dp
->dl_vfs_file
;
2118 return (type
== NFS4_READW_LT
|| type
== NFS4_READ_LT
) ?
2119 RD_STATE
: WR_STATE
;
2123 * Checks for sequence id mutating operations.
2126 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
)
2128 struct nfs4_stateid
*stp
;
2129 struct nfs4_stateowner
*sop
;
2131 dprintk("NFSD: preprocess_seqid_op: seqid=%d "
2132 "stateid = (%08x/%08x/%08x/%08x)\n", seqid
,
2133 stateid
->si_boot
, stateid
->si_stateownerid
, stateid
->si_fileid
,
2134 stateid
->si_generation
);
2139 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
)) {
2140 dprintk("NFSD: preprocess_seqid_op: magic stateid!\n");
2141 return nfserr_bad_stateid
;
2144 if (STALE_STATEID(stateid
))
2145 return nfserr_stale_stateid
;
2147 * We return BAD_STATEID if filehandle doesn't match stateid,
2148 * the confirmed flag is incorrecly set, or the generation
2149 * number is incorrect.
2151 stp
= find_stateid(stateid
, flags
);
2154 * Also, we should make sure this isn't just the result of
2157 sop
= search_close_lru(stateid
->si_stateownerid
, flags
);
2159 return nfserr_bad_stateid
;
2165 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
2166 clientid_t
*lockclid
= &lock
->v
.new.clientid
;
2167 struct nfs4_client
*clp
= sop
->so_client
;
2171 lkflg
= setlkflg(lock
->lk_type
);
2173 if (lock
->lk_is_new
) {
2174 if (!sop
->so_is_open_owner
)
2175 return nfserr_bad_stateid
;
2176 if (!same_clid(&clp
->cl_clientid
, lockclid
))
2177 return nfserr_bad_stateid
;
2178 /* stp is the open stateid */
2179 status
= nfs4_check_openmode(stp
, lkflg
);
2183 /* stp is the lock stateid */
2184 status
= nfs4_check_openmode(stp
->st_openstp
, lkflg
);
2190 if ((flags
& CHECK_FH
) && nfs4_check_fh(current_fh
, stp
)) {
2191 dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n");
2192 return nfserr_bad_stateid
;
2196 *sopp
= sop
= stp
->st_stateowner
;
2199 * We now validate the seqid and stateid generation numbers.
2200 * For the moment, we ignore the possibility of
2201 * generation number wraparound.
2203 if (seqid
!= sop
->so_seqid
)
2206 if (sop
->so_confirmed
&& flags
& CONFIRM
) {
2207 dprintk("NFSD: preprocess_seqid_op: expected"
2208 " unconfirmed stateowner!\n");
2209 return nfserr_bad_stateid
;
2211 if (!sop
->so_confirmed
&& !(flags
& CONFIRM
)) {
2212 dprintk("NFSD: preprocess_seqid_op: stateowner not"
2213 " confirmed yet!\n");
2214 return nfserr_bad_stateid
;
2216 if (stateid
->si_generation
> stp
->st_stateid
.si_generation
) {
2217 dprintk("NFSD: preprocess_seqid_op: future stateid?!\n");
2218 return nfserr_bad_stateid
;
2221 if (stateid
->si_generation
< stp
->st_stateid
.si_generation
) {
2222 dprintk("NFSD: preprocess_seqid_op: old stateid!\n");
2223 return nfserr_old_stateid
;
2225 renew_client(sop
->so_client
);
2229 if (seqid
== sop
->so_seqid
- 1) {
2230 dprintk("NFSD: preprocess_seqid_op: retransmission?\n");
2231 /* indicate replay to calling function */
2232 return nfserr_replay_me
;
2234 dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n",
2235 sop
->so_seqid
, seqid
);
2237 return nfserr_bad_seqid
;
2241 nfsd4_open_confirm(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2242 struct nfsd4_open_confirm
*oc
)
2245 struct nfs4_stateowner
*sop
;
2246 struct nfs4_stateid
*stp
;
2248 dprintk("NFSD: nfsd4_open_confirm on file %.*s\n",
2249 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
2250 cstate
->current_fh
.fh_dentry
->d_name
.name
);
2252 status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0);
2258 if ((status
= nfs4_preprocess_seqid_op(&cstate
->current_fh
,
2259 oc
->oc_seqid
, &oc
->oc_req_stateid
,
2260 CHECK_FH
| CONFIRM
| OPEN_STATE
,
2261 &oc
->oc_stateowner
, &stp
, NULL
)))
2264 sop
= oc
->oc_stateowner
;
2265 sop
->so_confirmed
= 1;
2266 update_stateid(&stp
->st_stateid
);
2267 memcpy(&oc
->oc_resp_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
2268 dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d "
2269 "stateid=(%08x/%08x/%08x/%08x)\n", oc
->oc_seqid
,
2270 stp
->st_stateid
.si_boot
,
2271 stp
->st_stateid
.si_stateownerid
,
2272 stp
->st_stateid
.si_fileid
,
2273 stp
->st_stateid
.si_generation
);
2275 nfsd4_create_clid_dir(sop
->so_client
);
2277 if (oc
->oc_stateowner
) {
2278 nfs4_get_stateowner(oc
->oc_stateowner
);
2279 cstate
->replay_owner
= oc
->oc_stateowner
;
2281 nfs4_unlock_state();
2287 * unset all bits in union bitmap (bmap) that
2288 * do not exist in share (from successful OPEN_DOWNGRADE)
2291 reset_union_bmap_access(unsigned long access
, unsigned long *bmap
)
2294 for (i
= 1; i
< 4; i
++) {
2295 if ((i
& access
) != i
)
2296 __clear_bit(i
, bmap
);
2301 reset_union_bmap_deny(unsigned long deny
, unsigned long *bmap
)
2304 for (i
= 0; i
< 4; i
++) {
2305 if ((i
& deny
) != i
)
2306 __clear_bit(i
, bmap
);
2311 nfsd4_open_downgrade(struct svc_rqst
*rqstp
,
2312 struct nfsd4_compound_state
*cstate
,
2313 struct nfsd4_open_downgrade
*od
)
2316 struct nfs4_stateid
*stp
;
2317 unsigned int share_access
;
2319 dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n",
2320 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
2321 cstate
->current_fh
.fh_dentry
->d_name
.name
);
2323 if (!access_valid(od
->od_share_access
)
2324 || !deny_valid(od
->od_share_deny
))
2325 return nfserr_inval
;
2328 if ((status
= nfs4_preprocess_seqid_op(&cstate
->current_fh
,
2331 CHECK_FH
| OPEN_STATE
,
2332 &od
->od_stateowner
, &stp
, NULL
)))
2335 status
= nfserr_inval
;
2336 if (!test_bit(od
->od_share_access
, &stp
->st_access_bmap
)) {
2337 dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n",
2338 stp
->st_access_bmap
, od
->od_share_access
);
2341 if (!test_bit(od
->od_share_deny
, &stp
->st_deny_bmap
)) {
2342 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
2343 stp
->st_deny_bmap
, od
->od_share_deny
);
2346 set_access(&share_access
, stp
->st_access_bmap
);
2347 nfs4_file_downgrade(stp
->st_vfs_file
,
2348 share_access
& ~od
->od_share_access
);
2350 reset_union_bmap_access(od
->od_share_access
, &stp
->st_access_bmap
);
2351 reset_union_bmap_deny(od
->od_share_deny
, &stp
->st_deny_bmap
);
2353 update_stateid(&stp
->st_stateid
);
2354 memcpy(&od
->od_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
2357 if (od
->od_stateowner
) {
2358 nfs4_get_stateowner(od
->od_stateowner
);
2359 cstate
->replay_owner
= od
->od_stateowner
;
2361 nfs4_unlock_state();
2366 * nfs4_unlock_state() called after encode
2369 nfsd4_close(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2370 struct nfsd4_close
*close
)
2373 struct nfs4_stateid
*stp
;
2375 dprintk("NFSD: nfsd4_close on file %.*s\n",
2376 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
2377 cstate
->current_fh
.fh_dentry
->d_name
.name
);
2380 /* check close_lru for replay */
2381 if ((status
= nfs4_preprocess_seqid_op(&cstate
->current_fh
,
2384 CHECK_FH
| OPEN_STATE
| CLOSE_STATE
,
2385 &close
->cl_stateowner
, &stp
, NULL
)))
2388 update_stateid(&stp
->st_stateid
);
2389 memcpy(&close
->cl_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
2391 /* release_stateid() calls nfsd_close() if needed */
2392 release_stateid(stp
, OPEN_STATE
);
2394 /* place unused nfs4_stateowners on so_close_lru list to be
2395 * released by the laundromat service after the lease period
2396 * to enable us to handle CLOSE replay
2398 if (list_empty(&close
->cl_stateowner
->so_stateids
))
2399 move_to_close_lru(close
->cl_stateowner
);
2401 if (close
->cl_stateowner
) {
2402 nfs4_get_stateowner(close
->cl_stateowner
);
2403 cstate
->replay_owner
= close
->cl_stateowner
;
2405 nfs4_unlock_state();
2410 nfsd4_delegreturn(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2411 struct nfsd4_delegreturn
*dr
)
2415 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
2419 status
= nfs4_preprocess_stateid_op(&cstate
->current_fh
,
2420 &dr
->dr_stateid
, DELEG_RET
, NULL
);
2421 nfs4_unlock_state();
2428 * Lock owner state (byte-range locks)
2430 #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
2431 #define LOCK_HASH_BITS 8
2432 #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS)
2433 #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1)
2435 #define lockownerid_hashval(id) \
2436 ((id) & LOCK_HASH_MASK)
2438 static inline unsigned int
2439 lock_ownerstr_hashval(struct inode
*inode
, u32 cl_id
,
2440 struct xdr_netobj
*ownername
)
2442 return (file_hashval(inode
) + cl_id
2443 + opaque_hashval(ownername
->data
, ownername
->len
))
2447 static struct list_head lock_ownerid_hashtbl
[LOCK_HASH_SIZE
];
2448 static struct list_head lock_ownerstr_hashtbl
[LOCK_HASH_SIZE
];
2449 static struct list_head lockstateid_hashtbl
[STATEID_HASH_SIZE
];
2451 static struct nfs4_stateid
*
2452 find_stateid(stateid_t
*stid
, int flags
)
2454 struct nfs4_stateid
*local
= NULL
;
2455 u32 st_id
= stid
->si_stateownerid
;
2456 u32 f_id
= stid
->si_fileid
;
2457 unsigned int hashval
;
2459 dprintk("NFSD: find_stateid flags 0x%x\n",flags
);
2460 if ((flags
& LOCK_STATE
) || (flags
& RD_STATE
) || (flags
& WR_STATE
)) {
2461 hashval
= stateid_hashval(st_id
, f_id
);
2462 list_for_each_entry(local
, &lockstateid_hashtbl
[hashval
], st_hash
) {
2463 if ((local
->st_stateid
.si_stateownerid
== st_id
) &&
2464 (local
->st_stateid
.si_fileid
== f_id
))
2468 if ((flags
& OPEN_STATE
) || (flags
& RD_STATE
) || (flags
& WR_STATE
)) {
2469 hashval
= stateid_hashval(st_id
, f_id
);
2470 list_for_each_entry(local
, &stateid_hashtbl
[hashval
], st_hash
) {
2471 if ((local
->st_stateid
.si_stateownerid
== st_id
) &&
2472 (local
->st_stateid
.si_fileid
== f_id
))
2479 static struct nfs4_delegation
*
2480 find_delegation_stateid(struct inode
*ino
, stateid_t
*stid
)
2482 struct nfs4_file
*fp
;
2483 struct nfs4_delegation
*dl
;
2485 dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n",
2486 stid
->si_boot
, stid
->si_stateownerid
,
2487 stid
->si_fileid
, stid
->si_generation
);
2489 fp
= find_file(ino
);
2492 dl
= find_delegation_file(fp
, stid
);
2498 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
2499 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
2500 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
2501 * locking, this prevents us from being completely protocol-compliant. The
2502 * real solution to this problem is to start using unsigned file offsets in
2503 * the VFS, but this is a very deep change!
2506 nfs4_transform_lock_offset(struct file_lock
*lock
)
2508 if (lock
->fl_start
< 0)
2509 lock
->fl_start
= OFFSET_MAX
;
2510 if (lock
->fl_end
< 0)
2511 lock
->fl_end
= OFFSET_MAX
;
2514 /* Hack!: For now, we're defining this just so we can use a pointer to it
2515 * as a unique cookie to identify our (NFSv4's) posix locks. */
2516 static struct lock_manager_operations nfsd_posix_mng_ops
= {
2520 nfs4_set_lock_denied(struct file_lock
*fl
, struct nfsd4_lock_denied
*deny
)
2522 struct nfs4_stateowner
*sop
;
2525 if (fl
->fl_lmops
== &nfsd_posix_mng_ops
) {
2526 sop
= (struct nfs4_stateowner
*) fl
->fl_owner
;
2527 hval
= lockownerid_hashval(sop
->so_id
);
2528 kref_get(&sop
->so_ref
);
2530 deny
->ld_clientid
= sop
->so_client
->cl_clientid
;
2532 deny
->ld_sop
= NULL
;
2533 deny
->ld_clientid
.cl_boot
= 0;
2534 deny
->ld_clientid
.cl_id
= 0;
2536 deny
->ld_start
= fl
->fl_start
;
2537 deny
->ld_length
= ~(u64
)0;
2538 if (fl
->fl_end
!= ~(u64
)0)
2539 deny
->ld_length
= fl
->fl_end
- fl
->fl_start
+ 1;
2540 deny
->ld_type
= NFS4_READ_LT
;
2541 if (fl
->fl_type
!= F_RDLCK
)
2542 deny
->ld_type
= NFS4_WRITE_LT
;
2545 static struct nfs4_stateowner
*
2546 find_lockstateowner_str(struct inode
*inode
, clientid_t
*clid
,
2547 struct xdr_netobj
*owner
)
2549 unsigned int hashval
= lock_ownerstr_hashval(inode
, clid
->cl_id
, owner
);
2550 struct nfs4_stateowner
*op
;
2552 list_for_each_entry(op
, &lock_ownerstr_hashtbl
[hashval
], so_strhash
) {
2553 if (same_owner_str(op
, owner
, clid
))
2560 * Alloc a lock owner structure.
2561 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
2564 * strhashval = lock_ownerstr_hashval
2567 static struct nfs4_stateowner
*
2568 alloc_init_lock_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_stateid
*open_stp
, struct nfsd4_lock
*lock
) {
2569 struct nfs4_stateowner
*sop
;
2570 struct nfs4_replay
*rp
;
2571 unsigned int idhashval
;
2573 if (!(sop
= alloc_stateowner(&lock
->lk_new_owner
)))
2575 idhashval
= lockownerid_hashval(current_ownerid
);
2576 INIT_LIST_HEAD(&sop
->so_idhash
);
2577 INIT_LIST_HEAD(&sop
->so_strhash
);
2578 INIT_LIST_HEAD(&sop
->so_perclient
);
2579 INIT_LIST_HEAD(&sop
->so_stateids
);
2580 INIT_LIST_HEAD(&sop
->so_perstateid
);
2581 INIT_LIST_HEAD(&sop
->so_close_lru
); /* not used */
2583 list_add(&sop
->so_idhash
, &lock_ownerid_hashtbl
[idhashval
]);
2584 list_add(&sop
->so_strhash
, &lock_ownerstr_hashtbl
[strhashval
]);
2585 list_add(&sop
->so_perstateid
, &open_stp
->st_lockowners
);
2586 sop
->so_is_open_owner
= 0;
2587 sop
->so_id
= current_ownerid
++;
2588 sop
->so_client
= clp
;
2589 /* It is the openowner seqid that will be incremented in encode in the
2590 * case of new lockowners; so increment the lock seqid manually: */
2591 sop
->so_seqid
= lock
->lk_new_lock_seqid
+ 1;
2592 sop
->so_confirmed
= 1;
2593 rp
= &sop
->so_replay
;
2594 rp
->rp_status
= nfserr_serverfault
;
2596 rp
->rp_buf
= rp
->rp_ibuf
;
2600 static struct nfs4_stateid
*
2601 alloc_init_lock_stateid(struct nfs4_stateowner
*sop
, struct nfs4_file
*fp
, struct nfs4_stateid
*open_stp
)
2603 struct nfs4_stateid
*stp
;
2604 unsigned int hashval
= stateid_hashval(sop
->so_id
, fp
->fi_id
);
2606 stp
= nfs4_alloc_stateid();
2609 INIT_LIST_HEAD(&stp
->st_hash
);
2610 INIT_LIST_HEAD(&stp
->st_perfile
);
2611 INIT_LIST_HEAD(&stp
->st_perstateowner
);
2612 INIT_LIST_HEAD(&stp
->st_lockowners
); /* not used */
2613 list_add(&stp
->st_hash
, &lockstateid_hashtbl
[hashval
]);
2614 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
2615 list_add(&stp
->st_perstateowner
, &sop
->so_stateids
);
2616 stp
->st_stateowner
= sop
;
2619 stp
->st_stateid
.si_boot
= boot_time
;
2620 stp
->st_stateid
.si_stateownerid
= sop
->so_id
;
2621 stp
->st_stateid
.si_fileid
= fp
->fi_id
;
2622 stp
->st_stateid
.si_generation
= 0;
2623 stp
->st_vfs_file
= open_stp
->st_vfs_file
; /* FIXME refcount?? */
2624 stp
->st_access_bmap
= open_stp
->st_access_bmap
;
2625 stp
->st_deny_bmap
= open_stp
->st_deny_bmap
;
2626 stp
->st_openstp
= open_stp
;
2633 check_lock_length(u64 offset
, u64 length
)
2635 return ((length
== 0) || ((length
!= ~(u64
)0) &&
2636 LOFF_OVERFLOW(offset
, length
)));
2643 nfsd4_lock(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2644 struct nfsd4_lock
*lock
)
2646 struct nfs4_stateowner
*open_sop
= NULL
;
2647 struct nfs4_stateowner
*lock_sop
= NULL
;
2648 struct nfs4_stateid
*lock_stp
;
2650 struct file_lock file_lock
;
2651 struct file_lock conflock
;
2653 unsigned int strhashval
;
2657 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
2658 (long long) lock
->lk_offset
,
2659 (long long) lock
->lk_length
);
2661 if (check_lock_length(lock
->lk_offset
, lock
->lk_length
))
2662 return nfserr_inval
;
2664 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
,
2665 S_IFREG
, MAY_LOCK
))) {
2666 dprintk("NFSD: nfsd4_lock: permission denied!\n");
2672 if (lock
->lk_is_new
) {
2674 * Client indicates that this is a new lockowner.
2675 * Use open owner and open stateid to create lock owner and
2678 struct nfs4_stateid
*open_stp
= NULL
;
2679 struct nfs4_file
*fp
;
2681 status
= nfserr_stale_clientid
;
2682 if (STALE_CLIENTID(&lock
->lk_new_clientid
))
2685 /* validate and update open stateid and open seqid */
2686 status
= nfs4_preprocess_seqid_op(&cstate
->current_fh
,
2687 lock
->lk_new_open_seqid
,
2688 &lock
->lk_new_open_stateid
,
2689 CHECK_FH
| OPEN_STATE
,
2690 &lock
->lk_replay_owner
, &open_stp
,
2694 open_sop
= lock
->lk_replay_owner
;
2695 /* create lockowner and lock stateid */
2696 fp
= open_stp
->st_file
;
2697 strhashval
= lock_ownerstr_hashval(fp
->fi_inode
,
2698 open_sop
->so_client
->cl_clientid
.cl_id
,
2699 &lock
->v
.new.owner
);
2700 /* XXX: Do we need to check for duplicate stateowners on
2701 * the same file, or should they just be allowed (and
2702 * create new stateids)? */
2703 status
= nfserr_resource
;
2704 lock_sop
= alloc_init_lock_stateowner(strhashval
,
2705 open_sop
->so_client
, open_stp
, lock
);
2706 if (lock_sop
== NULL
)
2708 lock_stp
= alloc_init_lock_stateid(lock_sop
, fp
, open_stp
);
2709 if (lock_stp
== NULL
)
2712 /* lock (lock owner + lock stateid) already exists */
2713 status
= nfs4_preprocess_seqid_op(&cstate
->current_fh
,
2714 lock
->lk_old_lock_seqid
,
2715 &lock
->lk_old_lock_stateid
,
2716 CHECK_FH
| LOCK_STATE
,
2717 &lock
->lk_replay_owner
, &lock_stp
, lock
);
2720 lock_sop
= lock
->lk_replay_owner
;
2722 /* lock->lk_replay_owner and lock_stp have been created or found */
2723 filp
= lock_stp
->st_vfs_file
;
2725 status
= nfserr_grace
;
2726 if (nfs4_in_grace() && !lock
->lk_reclaim
)
2728 status
= nfserr_no_grace
;
2729 if (!nfs4_in_grace() && lock
->lk_reclaim
)
2732 locks_init_lock(&file_lock
);
2733 switch (lock
->lk_type
) {
2736 file_lock
.fl_type
= F_RDLCK
;
2740 case NFS4_WRITEW_LT
:
2741 file_lock
.fl_type
= F_WRLCK
;
2745 status
= nfserr_inval
;
2748 file_lock
.fl_owner
= (fl_owner_t
)lock_sop
;
2749 file_lock
.fl_pid
= current
->tgid
;
2750 file_lock
.fl_file
= filp
;
2751 file_lock
.fl_flags
= FL_POSIX
;
2752 file_lock
.fl_lmops
= &nfsd_posix_mng_ops
;
2754 file_lock
.fl_start
= lock
->lk_offset
;
2755 if ((lock
->lk_length
== ~(u64
)0) ||
2756 LOFF_OVERFLOW(lock
->lk_offset
, lock
->lk_length
))
2757 file_lock
.fl_end
= ~(u64
)0;
2759 file_lock
.fl_end
= lock
->lk_offset
+ lock
->lk_length
- 1;
2760 nfs4_transform_lock_offset(&file_lock
);
2763 * Try to lock the file in the VFS.
2764 * Note: locks.c uses the BKL to protect the inode's lock list.
2767 /* XXX?: Just to divert the locks_release_private at the start of
2768 * locks_copy_lock: */
2769 locks_init_lock(&conflock
);
2770 err
= vfs_lock_file(filp
, cmd
, &file_lock
, &conflock
);
2772 case 0: /* success! */
2773 update_stateid(&lock_stp
->st_stateid
);
2774 memcpy(&lock
->lk_resp_stateid
, &lock_stp
->st_stateid
,
2778 case (EAGAIN
): /* conflock holds conflicting lock */
2779 status
= nfserr_denied
;
2780 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
2781 nfs4_set_lock_denied(&conflock
, &lock
->lk_denied
);
2784 status
= nfserr_deadlock
;
2787 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err
);
2788 status
= nfserr_resource
;
2792 if (status
&& lock
->lk_is_new
&& lock_sop
)
2793 release_stateowner(lock_sop
);
2794 if (lock
->lk_replay_owner
) {
2795 nfs4_get_stateowner(lock
->lk_replay_owner
);
2796 cstate
->replay_owner
= lock
->lk_replay_owner
;
2798 nfs4_unlock_state();
2806 nfsd4_lockt(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2807 struct nfsd4_lockt
*lockt
)
2809 struct inode
*inode
;
2811 struct file_lock file_lock
;
2815 if (nfs4_in_grace())
2816 return nfserr_grace
;
2818 if (check_lock_length(lockt
->lt_offset
, lockt
->lt_length
))
2819 return nfserr_inval
;
2821 lockt
->lt_stateowner
= NULL
;
2824 status
= nfserr_stale_clientid
;
2825 if (STALE_CLIENTID(&lockt
->lt_clientid
))
2828 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0))) {
2829 dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n");
2830 if (status
== nfserr_symlink
)
2831 status
= nfserr_inval
;
2835 inode
= cstate
->current_fh
.fh_dentry
->d_inode
;
2836 locks_init_lock(&file_lock
);
2837 switch (lockt
->lt_type
) {
2840 file_lock
.fl_type
= F_RDLCK
;
2843 case NFS4_WRITEW_LT
:
2844 file_lock
.fl_type
= F_WRLCK
;
2847 dprintk("NFSD: nfs4_lockt: bad lock type!\n");
2848 status
= nfserr_inval
;
2852 lockt
->lt_stateowner
= find_lockstateowner_str(inode
,
2853 &lockt
->lt_clientid
, &lockt
->lt_owner
);
2854 if (lockt
->lt_stateowner
)
2855 file_lock
.fl_owner
= (fl_owner_t
)lockt
->lt_stateowner
;
2856 file_lock
.fl_pid
= current
->tgid
;
2857 file_lock
.fl_flags
= FL_POSIX
;
2858 file_lock
.fl_lmops
= &nfsd_posix_mng_ops
;
2860 file_lock
.fl_start
= lockt
->lt_offset
;
2861 if ((lockt
->lt_length
== ~(u64
)0) || LOFF_OVERFLOW(lockt
->lt_offset
, lockt
->lt_length
))
2862 file_lock
.fl_end
= ~(u64
)0;
2864 file_lock
.fl_end
= lockt
->lt_offset
+ lockt
->lt_length
- 1;
2866 nfs4_transform_lock_offset(&file_lock
);
2868 /* vfs_test_lock uses the struct file _only_ to resolve the inode.
2869 * since LOCKT doesn't require an OPEN, and therefore a struct
2870 * file may not exist, pass vfs_test_lock a struct file with
2871 * only the dentry:inode set.
2873 memset(&file
, 0, sizeof (struct file
));
2874 file
.f_path
.dentry
= cstate
->current_fh
.fh_dentry
;
2877 error
= vfs_test_lock(&file
, &file_lock
);
2879 status
= nfserrno(error
);
2882 if (file_lock
.fl_type
!= F_UNLCK
) {
2883 status
= nfserr_denied
;
2884 nfs4_set_lock_denied(&file_lock
, &lockt
->lt_denied
);
2887 nfs4_unlock_state();
2892 nfsd4_locku(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2893 struct nfsd4_locku
*locku
)
2895 struct nfs4_stateid
*stp
;
2896 struct file
*filp
= NULL
;
2897 struct file_lock file_lock
;
2901 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
2902 (long long) locku
->lu_offset
,
2903 (long long) locku
->lu_length
);
2905 if (check_lock_length(locku
->lu_offset
, locku
->lu_length
))
2906 return nfserr_inval
;
2910 if ((status
= nfs4_preprocess_seqid_op(&cstate
->current_fh
,
2913 CHECK_FH
| LOCK_STATE
,
2914 &locku
->lu_stateowner
, &stp
, NULL
)))
2917 filp
= stp
->st_vfs_file
;
2919 locks_init_lock(&file_lock
);
2920 file_lock
.fl_type
= F_UNLCK
;
2921 file_lock
.fl_owner
= (fl_owner_t
) locku
->lu_stateowner
;
2922 file_lock
.fl_pid
= current
->tgid
;
2923 file_lock
.fl_file
= filp
;
2924 file_lock
.fl_flags
= FL_POSIX
;
2925 file_lock
.fl_lmops
= &nfsd_posix_mng_ops
;
2926 file_lock
.fl_start
= locku
->lu_offset
;
2928 if ((locku
->lu_length
== ~(u64
)0) || LOFF_OVERFLOW(locku
->lu_offset
, locku
->lu_length
))
2929 file_lock
.fl_end
= ~(u64
)0;
2931 file_lock
.fl_end
= locku
->lu_offset
+ locku
->lu_length
- 1;
2932 nfs4_transform_lock_offset(&file_lock
);
2935 * Try to unlock the file in the VFS.
2937 err
= vfs_lock_file(filp
, F_SETLK
, &file_lock
, NULL
);
2939 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
2943 * OK, unlock succeeded; the only thing left to do is update the stateid.
2945 update_stateid(&stp
->st_stateid
);
2946 memcpy(&locku
->lu_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
2949 if (locku
->lu_stateowner
) {
2950 nfs4_get_stateowner(locku
->lu_stateowner
);
2951 cstate
->replay_owner
= locku
->lu_stateowner
;
2953 nfs4_unlock_state();
2957 status
= nfserrno(err
);
2963 * 1: locks held by lockowner
2964 * 0: no locks held by lockowner
2967 check_for_locks(struct file
*filp
, struct nfs4_stateowner
*lowner
)
2969 struct file_lock
**flpp
;
2970 struct inode
*inode
= filp
->f_path
.dentry
->d_inode
;
2974 for (flpp
= &inode
->i_flock
; *flpp
!= NULL
; flpp
= &(*flpp
)->fl_next
) {
2975 if ((*flpp
)->fl_owner
== (fl_owner_t
)lowner
) {
2986 nfsd4_release_lockowner(struct svc_rqst
*rqstp
,
2987 struct nfsd4_compound_state
*cstate
,
2988 struct nfsd4_release_lockowner
*rlockowner
)
2990 clientid_t
*clid
= &rlockowner
->rl_clientid
;
2991 struct nfs4_stateowner
*sop
;
2992 struct nfs4_stateid
*stp
;
2993 struct xdr_netobj
*owner
= &rlockowner
->rl_owner
;
2994 struct list_head matches
;
2998 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
2999 clid
->cl_boot
, clid
->cl_id
);
3001 /* XXX check for lease expiration */
3003 status
= nfserr_stale_clientid
;
3004 if (STALE_CLIENTID(clid
))
3009 status
= nfserr_locks_held
;
3010 /* XXX: we're doing a linear search through all the lockowners.
3011 * Yipes! For now we'll just hope clients aren't really using
3012 * release_lockowner much, but eventually we have to fix these
3013 * data structures. */
3014 INIT_LIST_HEAD(&matches
);
3015 for (i
= 0; i
< LOCK_HASH_SIZE
; i
++) {
3016 list_for_each_entry(sop
, &lock_ownerid_hashtbl
[i
], so_idhash
) {
3017 if (!same_owner_str(sop
, owner
, clid
))
3019 list_for_each_entry(stp
, &sop
->so_stateids
,
3021 if (check_for_locks(stp
->st_vfs_file
, sop
))
3023 /* Note: so_perclient unused for lockowners,
3024 * so it's OK to fool with here. */
3025 list_add(&sop
->so_perclient
, &matches
);
3029 /* Clients probably won't expect us to return with some (but not all)
3030 * of the lockowner state released; so don't release any until all
3031 * have been checked. */
3033 while (!list_empty(&matches
)) {
3034 sop
= list_entry(matches
.next
, struct nfs4_stateowner
,
3036 /* unhash_stateowner deletes so_perclient only
3037 * for openowners. */
3038 list_del(&sop
->so_perclient
);
3039 release_stateowner(sop
);
3042 nfs4_unlock_state();
3046 static inline struct nfs4_client_reclaim
*
3049 return kmalloc(sizeof(struct nfs4_client_reclaim
), GFP_KERNEL
);
3053 nfs4_has_reclaimed_state(const char *name
)
3055 unsigned int strhashval
= clientstr_hashval(name
);
3056 struct nfs4_client
*clp
;
3058 clp
= find_confirmed_client_by_str(name
, strhashval
);
3063 * failure => all reset bets are off, nfserr_no_grace...
3066 nfs4_client_to_reclaim(const char *name
)
3068 unsigned int strhashval
;
3069 struct nfs4_client_reclaim
*crp
= NULL
;
3071 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN
, name
);
3072 crp
= alloc_reclaim();
3075 strhashval
= clientstr_hashval(name
);
3076 INIT_LIST_HEAD(&crp
->cr_strhash
);
3077 list_add(&crp
->cr_strhash
, &reclaim_str_hashtbl
[strhashval
]);
3078 memcpy(crp
->cr_recdir
, name
, HEXDIR_LEN
);
3079 reclaim_str_hashtbl_size
++;
3084 nfs4_release_reclaim(void)
3086 struct nfs4_client_reclaim
*crp
= NULL
;
3089 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
3090 while (!list_empty(&reclaim_str_hashtbl
[i
])) {
3091 crp
= list_entry(reclaim_str_hashtbl
[i
].next
,
3092 struct nfs4_client_reclaim
, cr_strhash
);
3093 list_del(&crp
->cr_strhash
);
3095 reclaim_str_hashtbl_size
--;
3098 BUG_ON(reclaim_str_hashtbl_size
);
3102 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
3103 static struct nfs4_client_reclaim
*
3104 nfs4_find_reclaim_client(clientid_t
*clid
)
3106 unsigned int strhashval
;
3107 struct nfs4_client
*clp
;
3108 struct nfs4_client_reclaim
*crp
= NULL
;
3111 /* find clientid in conf_id_hashtbl */
3112 clp
= find_confirmed_client(clid
);
3116 dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n",
3117 clp
->cl_name
.len
, clp
->cl_name
.data
,
3120 /* find clp->cl_name in reclaim_str_hashtbl */
3121 strhashval
= clientstr_hashval(clp
->cl_recdir
);
3122 list_for_each_entry(crp
, &reclaim_str_hashtbl
[strhashval
], cr_strhash
) {
3123 if (same_name(crp
->cr_recdir
, clp
->cl_recdir
)) {
3131 * Called from OPEN. Look for clientid in reclaim list.
3134 nfs4_check_open_reclaim(clientid_t
*clid
)
3136 return nfs4_find_reclaim_client(clid
) ? nfs_ok
: nfserr_reclaim_bad
;
3139 /* initialization to perform at module load time: */
3142 nfs4_state_init(void)
3146 status
= nfsd4_init_slabs();
3149 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
3150 INIT_LIST_HEAD(&conf_id_hashtbl
[i
]);
3151 INIT_LIST_HEAD(&conf_str_hashtbl
[i
]);
3152 INIT_LIST_HEAD(&unconf_str_hashtbl
[i
]);
3153 INIT_LIST_HEAD(&unconf_id_hashtbl
[i
]);
3155 for (i
= 0; i
< FILE_HASH_SIZE
; i
++) {
3156 INIT_LIST_HEAD(&file_hashtbl
[i
]);
3158 for (i
= 0; i
< OWNER_HASH_SIZE
; i
++) {
3159 INIT_LIST_HEAD(&ownerstr_hashtbl
[i
]);
3160 INIT_LIST_HEAD(&ownerid_hashtbl
[i
]);
3162 for (i
= 0; i
< STATEID_HASH_SIZE
; i
++) {
3163 INIT_LIST_HEAD(&stateid_hashtbl
[i
]);
3164 INIT_LIST_HEAD(&lockstateid_hashtbl
[i
]);
3166 for (i
= 0; i
< LOCK_HASH_SIZE
; i
++) {
3167 INIT_LIST_HEAD(&lock_ownerid_hashtbl
[i
]);
3168 INIT_LIST_HEAD(&lock_ownerstr_hashtbl
[i
]);
3170 memset(&onestateid
, ~0, sizeof(stateid_t
));
3171 INIT_LIST_HEAD(&close_lru
);
3172 INIT_LIST_HEAD(&client_lru
);
3173 INIT_LIST_HEAD(&del_recall_lru
);
3174 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++)
3175 INIT_LIST_HEAD(&reclaim_str_hashtbl
[i
]);
3176 reclaim_str_hashtbl_size
= 0;
3181 nfsd4_load_reboot_recovery_data(void)
3186 nfsd4_init_recdir(user_recovery_dirname
);
3187 status
= nfsd4_recdir_load();
3188 nfs4_unlock_state();
3190 printk("NFSD: Failure reading reboot recovery data\n");
3194 get_nfs4_grace_period(void)
3196 return max(user_lease_time
, lease_time
) * HZ
;
3200 * Since the lifetime of a delegation isn't limited to that of an open, a
3201 * client may quite reasonably hang on to a delegation as long as it has
3202 * the inode cached. This becomes an obvious problem the first time a
3203 * client's inode cache approaches the size of the server's total memory.
3205 * For now we avoid this problem by imposing a hard limit on the number
3206 * of delegations, which varies according to the server's memory size.
3209 set_max_delegations(void)
3212 * Allow at most 4 delegations per megabyte of RAM. Quick
3213 * estimates suggest that in the worst case (where every delegation
3214 * is for a different inode), a delegation could take about 1.5K,
3215 * giving a worst case usage of about 6% of memory.
3217 max_delegations
= nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT
);
3220 /* initialization to perform when the nfsd service is started: */
3223 __nfs4_state_start(void)
3225 unsigned long grace_time
;
3227 boot_time
= get_seconds();
3228 grace_time
= get_nfs_grace_period();
3229 lease_time
= user_lease_time
;
3231 printk(KERN_INFO
"NFSD: starting %ld-second grace period\n",
3233 laundry_wq
= create_singlethread_workqueue("nfsd4");
3234 queue_delayed_work(laundry_wq
, &laundromat_work
, grace_time
);
3235 set_max_delegations();
3239 nfs4_state_start(void)
3243 nfsd4_load_reboot_recovery_data();
3244 __nfs4_state_start();
3256 nfs4_lease_time(void)
3262 __nfs4_state_shutdown(void)
3265 struct nfs4_client
*clp
= NULL
;
3266 struct nfs4_delegation
*dp
= NULL
;
3267 struct list_head
*pos
, *next
, reaplist
;
3269 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
3270 while (!list_empty(&conf_id_hashtbl
[i
])) {
3271 clp
= list_entry(conf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
3274 while (!list_empty(&unconf_str_hashtbl
[i
])) {
3275 clp
= list_entry(unconf_str_hashtbl
[i
].next
, struct nfs4_client
, cl_strhash
);
3279 INIT_LIST_HEAD(&reaplist
);
3280 spin_lock(&recall_lock
);
3281 list_for_each_safe(pos
, next
, &del_recall_lru
) {
3282 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3283 list_move(&dp
->dl_recall_lru
, &reaplist
);
3285 spin_unlock(&recall_lock
);
3286 list_for_each_safe(pos
, next
, &reaplist
) {
3287 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3288 list_del_init(&dp
->dl_recall_lru
);
3289 unhash_delegation(dp
);
3292 nfsd4_shutdown_recdir();
3297 nfs4_state_shutdown(void)
3299 cancel_rearming_delayed_workqueue(laundry_wq
, &laundromat_work
);
3300 destroy_workqueue(laundry_wq
);
3302 nfs4_release_reclaim();
3303 __nfs4_state_shutdown();
3304 nfs4_unlock_state();
3308 nfs4_set_recdir(char *recdir
)
3311 strcpy(user_recovery_dirname
, recdir
);
3312 nfs4_unlock_state();
3316 * Change the NFSv4 recovery directory to recdir.
3319 nfs4_reset_recoverydir(char *recdir
)
3322 struct nameidata nd
;
3324 status
= path_lookup(recdir
, LOOKUP_FOLLOW
, &nd
);
3328 if (S_ISDIR(nd
.dentry
->d_inode
->i_mode
)) {
3329 nfs4_set_recdir(recdir
);
3337 * Called when leasetime is changed.
3339 * The only way the protocol gives us to handle on-the-fly lease changes is to
3340 * simulate a reboot. Instead of doing that, we just wait till the next time
3341 * we start to register any changes in lease time. If the administrator
3342 * really wants to change the lease time *now*, they can go ahead and bring
3343 * nfsd down and then back up again after changing the lease time.
3346 nfs4_reset_lease(time_t leasetime
)
3349 user_lease_time
= leasetime
;