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 nfsd4_setclientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
688 struct nfsd4_setclientid
*setclid
)
690 struct sockaddr_in
*sin
= svc_addr_in(rqstp
);
691 struct xdr_netobj clname
= {
692 .len
= setclid
->se_namelen
,
693 .data
= setclid
->se_name
,
695 nfs4_verifier clverifier
= setclid
->se_verf
;
696 unsigned int strhashval
;
697 struct nfs4_client
*conf
, *unconf
, *new;
699 char dname
[HEXDIR_LEN
];
701 if (!check_name(clname
))
704 status
= nfs4_make_rec_clidname(dname
, &clname
);
709 * XXX The Duplicate Request Cache (DRC) has been checked (??)
710 * We get here on a DRC miss.
713 strhashval
= clientstr_hashval(dname
);
716 conf
= find_confirmed_client_by_str(dname
, strhashval
);
718 /* RFC 3530 14.2.33 CASE 0: */
719 status
= nfserr_clid_inuse
;
720 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)
721 || conf
->cl_addr
!= sin
->sin_addr
.s_addr
) {
722 dprintk("NFSD: setclientid: string in use by client"
723 "at %u.%u.%u.%u\n", NIPQUAD(conf
->cl_addr
));
728 * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION")
729 * has a description of SETCLIENTID request processing consisting
730 * of 5 bullet points, labeled as CASE0 - CASE4 below.
732 unconf
= find_unconfirmed_client_by_str(dname
, strhashval
);
733 status
= nfserr_resource
;
736 * RFC 3530 14.2.33 CASE 4:
737 * placed first, because it is the normal case
740 expire_client(unconf
);
741 new = create_client(clname
, dname
);
745 } else if (same_verf(&conf
->cl_verifier
, &clverifier
)) {
747 * RFC 3530 14.2.33 CASE 1:
748 * probable callback update
751 /* Note this is removing unconfirmed {*x***},
752 * which is stronger than RFC recommended {vxc**}.
753 * This has the advantage that there is at most
754 * one {*x***} in either list at any time.
756 expire_client(unconf
);
758 new = create_client(clname
, dname
);
761 copy_clid(new, conf
);
762 } else if (!unconf
) {
764 * RFC 3530 14.2.33 CASE 2:
765 * probable client reboot; state will be removed if
768 new = create_client(clname
, dname
);
772 } else if (!same_verf(&conf
->cl_confirm
, &unconf
->cl_confirm
)) {
774 * RFC 3530 14.2.33 CASE 3:
775 * probable client reboot; state will be removed if
778 expire_client(unconf
);
779 new = create_client(clname
, dname
);
784 /* No cases hit !!! */
785 status
= nfserr_inval
;
789 copy_verf(new, &clverifier
);
790 new->cl_addr
= sin
->sin_addr
.s_addr
;
791 copy_cred(&new->cl_cred
, &rqstp
->rq_cred
);
793 gen_callback(new, setclid
);
794 add_to_unconfirmed(new, strhashval
);
795 setclid
->se_clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
796 setclid
->se_clientid
.cl_id
= new->cl_clientid
.cl_id
;
797 memcpy(setclid
->se_confirm
.data
, new->cl_confirm
.data
, sizeof(setclid
->se_confirm
.data
));
806 * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has
807 * a description of SETCLIENTID_CONFIRM request processing consisting of 4
808 * bullets, labeled as CASE1 - CASE4 below.
811 nfsd4_setclientid_confirm(struct svc_rqst
*rqstp
,
812 struct nfsd4_compound_state
*cstate
,
813 struct nfsd4_setclientid_confirm
*setclientid_confirm
)
815 struct sockaddr_in
*sin
= svc_addr_in(rqstp
);
816 struct nfs4_client
*conf
, *unconf
;
817 nfs4_verifier confirm
= setclientid_confirm
->sc_confirm
;
818 clientid_t
* clid
= &setclientid_confirm
->sc_clientid
;
821 if (STALE_CLIENTID(clid
))
822 return nfserr_stale_clientid
;
824 * XXX The Duplicate Request Cache (DRC) has been checked (??)
825 * We get here on a DRC miss.
830 conf
= find_confirmed_client(clid
);
831 unconf
= find_unconfirmed_client(clid
);
833 status
= nfserr_clid_inuse
;
834 if (conf
&& conf
->cl_addr
!= sin
->sin_addr
.s_addr
)
836 if (unconf
&& unconf
->cl_addr
!= sin
->sin_addr
.s_addr
)
840 * section 14.2.34 of RFC 3530 has a description of
841 * SETCLIENTID_CONFIRM request processing consisting
842 * of 4 bullet points, labeled as CASE1 - CASE4 below.
844 if ((conf
&& unconf
) &&
845 (same_verf(&unconf
->cl_confirm
, &confirm
)) &&
846 (same_verf(&conf
->cl_verifier
, &unconf
->cl_verifier
)) &&
847 (same_name(conf
->cl_recdir
,unconf
->cl_recdir
)) &&
848 (!same_verf(&conf
->cl_confirm
, &unconf
->cl_confirm
))) {
850 * RFC 3530 14.2.34 CASE 1:
853 if (!same_creds(&conf
->cl_cred
, &unconf
->cl_cred
))
854 status
= nfserr_clid_inuse
;
856 /* XXX: We just turn off callbacks until we can handle
857 * change request correctly. */
858 atomic_set(&conf
->cl_callback
.cb_set
, 0);
860 nfsd4_remove_clid_dir(unconf
);
861 expire_client(unconf
);
865 } else if ((conf
&& !unconf
) ||
867 (!same_verf(&conf
->cl_verifier
, &unconf
->cl_verifier
) ||
868 !same_name(conf
->cl_recdir
, unconf
->cl_recdir
)))) {
870 * RFC 3530 14.2.34 CASE 2:
871 * probable retransmitted request; play it safe and
874 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
))
875 status
= nfserr_clid_inuse
;
878 } else if (!conf
&& unconf
879 && same_verf(&unconf
->cl_confirm
, &confirm
)) {
881 * RFC 3530 14.2.34 CASE 3:
882 * Normal case; new or rebooted client:
884 if (!same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
)) {
885 status
= nfserr_clid_inuse
;
888 clientstr_hashval(unconf
->cl_recdir
);
889 conf
= find_confirmed_client_by_str(unconf
->cl_recdir
,
892 nfsd4_remove_clid_dir(conf
);
895 move_to_confirmed(unconf
);
897 nfsd4_probe_callback(conf
);
900 } else if ((!conf
|| (conf
&& !same_verf(&conf
->cl_confirm
, &confirm
)))
901 && (!unconf
|| (unconf
&& !same_verf(&unconf
->cl_confirm
,
904 * RFC 3530 14.2.34 CASE 4:
905 * Client probably hasn't noticed that we rebooted yet.
907 status
= nfserr_stale_clientid
;
909 /* check that we have hit one of the cases...*/
910 status
= nfserr_clid_inuse
;
917 /* OPEN Share state helper functions */
918 static inline struct nfs4_file
*
919 alloc_init_file(struct inode
*ino
)
921 struct nfs4_file
*fp
;
922 unsigned int hashval
= file_hashval(ino
);
924 fp
= kmem_cache_alloc(file_slab
, GFP_KERNEL
);
926 kref_init(&fp
->fi_ref
);
927 INIT_LIST_HEAD(&fp
->fi_hash
);
928 INIT_LIST_HEAD(&fp
->fi_stateids
);
929 INIT_LIST_HEAD(&fp
->fi_delegations
);
930 list_add(&fp
->fi_hash
, &file_hashtbl
[hashval
]);
931 fp
->fi_inode
= igrab(ino
);
932 fp
->fi_id
= current_fileid
++;
933 fp
->fi_had_conflict
= false;
940 nfsd4_free_slab(struct kmem_cache
**slab
)
944 kmem_cache_destroy(*slab
);
949 nfsd4_free_slabs(void)
951 nfsd4_free_slab(&stateowner_slab
);
952 nfsd4_free_slab(&file_slab
);
953 nfsd4_free_slab(&stateid_slab
);
954 nfsd4_free_slab(&deleg_slab
);
958 nfsd4_init_slabs(void)
960 stateowner_slab
= kmem_cache_create("nfsd4_stateowners",
961 sizeof(struct nfs4_stateowner
), 0, 0, NULL
);
962 if (stateowner_slab
== NULL
)
964 file_slab
= kmem_cache_create("nfsd4_files",
965 sizeof(struct nfs4_file
), 0, 0, NULL
);
966 if (file_slab
== NULL
)
968 stateid_slab
= kmem_cache_create("nfsd4_stateids",
969 sizeof(struct nfs4_stateid
), 0, 0, NULL
);
970 if (stateid_slab
== NULL
)
972 deleg_slab
= kmem_cache_create("nfsd4_delegations",
973 sizeof(struct nfs4_delegation
), 0, 0, NULL
);
974 if (deleg_slab
== NULL
)
979 dprintk("nfsd4: out of memory while initializing nfsv4\n");
984 nfs4_free_stateowner(struct kref
*kref
)
986 struct nfs4_stateowner
*sop
=
987 container_of(kref
, struct nfs4_stateowner
, so_ref
);
988 kfree(sop
->so_owner
.data
);
989 kmem_cache_free(stateowner_slab
, sop
);
992 static inline struct nfs4_stateowner
*
993 alloc_stateowner(struct xdr_netobj
*owner
)
995 struct nfs4_stateowner
*sop
;
997 if ((sop
= kmem_cache_alloc(stateowner_slab
, GFP_KERNEL
))) {
998 if ((sop
->so_owner
.data
= kmalloc(owner
->len
, GFP_KERNEL
))) {
999 memcpy(sop
->so_owner
.data
, owner
->data
, owner
->len
);
1000 sop
->so_owner
.len
= owner
->len
;
1001 kref_init(&sop
->so_ref
);
1004 kmem_cache_free(stateowner_slab
, sop
);
1009 static struct nfs4_stateowner
*
1010 alloc_init_open_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfsd4_open
*open
) {
1011 struct nfs4_stateowner
*sop
;
1012 struct nfs4_replay
*rp
;
1013 unsigned int idhashval
;
1015 if (!(sop
= alloc_stateowner(&open
->op_owner
)))
1017 idhashval
= ownerid_hashval(current_ownerid
);
1018 INIT_LIST_HEAD(&sop
->so_idhash
);
1019 INIT_LIST_HEAD(&sop
->so_strhash
);
1020 INIT_LIST_HEAD(&sop
->so_perclient
);
1021 INIT_LIST_HEAD(&sop
->so_stateids
);
1022 INIT_LIST_HEAD(&sop
->so_perstateid
); /* not used */
1023 INIT_LIST_HEAD(&sop
->so_close_lru
);
1025 list_add(&sop
->so_idhash
, &ownerid_hashtbl
[idhashval
]);
1026 list_add(&sop
->so_strhash
, &ownerstr_hashtbl
[strhashval
]);
1027 list_add(&sop
->so_perclient
, &clp
->cl_openowners
);
1028 sop
->so_is_open_owner
= 1;
1029 sop
->so_id
= current_ownerid
++;
1030 sop
->so_client
= clp
;
1031 sop
->so_seqid
= open
->op_seqid
;
1032 sop
->so_confirmed
= 0;
1033 rp
= &sop
->so_replay
;
1034 rp
->rp_status
= nfserr_serverfault
;
1036 rp
->rp_buf
= rp
->rp_ibuf
;
1041 release_stateid_lockowners(struct nfs4_stateid
*open_stp
)
1043 struct nfs4_stateowner
*lock_sop
;
1045 while (!list_empty(&open_stp
->st_lockowners
)) {
1046 lock_sop
= list_entry(open_stp
->st_lockowners
.next
,
1047 struct nfs4_stateowner
, so_perstateid
);
1048 /* list_del(&open_stp->st_lockowners); */
1049 BUG_ON(lock_sop
->so_is_open_owner
);
1050 release_stateowner(lock_sop
);
1055 unhash_stateowner(struct nfs4_stateowner
*sop
)
1057 struct nfs4_stateid
*stp
;
1059 list_del(&sop
->so_idhash
);
1060 list_del(&sop
->so_strhash
);
1061 if (sop
->so_is_open_owner
)
1062 list_del(&sop
->so_perclient
);
1063 list_del(&sop
->so_perstateid
);
1064 while (!list_empty(&sop
->so_stateids
)) {
1065 stp
= list_entry(sop
->so_stateids
.next
,
1066 struct nfs4_stateid
, st_perstateowner
);
1067 if (sop
->so_is_open_owner
)
1068 release_stateid(stp
, OPEN_STATE
);
1070 release_stateid(stp
, LOCK_STATE
);
1075 release_stateowner(struct nfs4_stateowner
*sop
)
1077 unhash_stateowner(sop
);
1078 list_del(&sop
->so_close_lru
);
1079 nfs4_put_stateowner(sop
);
1083 init_stateid(struct nfs4_stateid
*stp
, struct nfs4_file
*fp
, struct nfsd4_open
*open
) {
1084 struct nfs4_stateowner
*sop
= open
->op_stateowner
;
1085 unsigned int hashval
= stateid_hashval(sop
->so_id
, fp
->fi_id
);
1087 INIT_LIST_HEAD(&stp
->st_hash
);
1088 INIT_LIST_HEAD(&stp
->st_perstateowner
);
1089 INIT_LIST_HEAD(&stp
->st_lockowners
);
1090 INIT_LIST_HEAD(&stp
->st_perfile
);
1091 list_add(&stp
->st_hash
, &stateid_hashtbl
[hashval
]);
1092 list_add(&stp
->st_perstateowner
, &sop
->so_stateids
);
1093 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
1094 stp
->st_stateowner
= sop
;
1097 stp
->st_stateid
.si_boot
= boot_time
;
1098 stp
->st_stateid
.si_stateownerid
= sop
->so_id
;
1099 stp
->st_stateid
.si_fileid
= fp
->fi_id
;
1100 stp
->st_stateid
.si_generation
= 0;
1101 stp
->st_access_bmap
= 0;
1102 stp
->st_deny_bmap
= 0;
1103 __set_bit(open
->op_share_access
, &stp
->st_access_bmap
);
1104 __set_bit(open
->op_share_deny
, &stp
->st_deny_bmap
);
1105 stp
->st_openstp
= NULL
;
1109 release_stateid(struct nfs4_stateid
*stp
, int flags
)
1111 struct file
*filp
= stp
->st_vfs_file
;
1113 list_del(&stp
->st_hash
);
1114 list_del(&stp
->st_perfile
);
1115 list_del(&stp
->st_perstateowner
);
1116 if (flags
& OPEN_STATE
) {
1117 release_stateid_lockowners(stp
);
1118 stp
->st_vfs_file
= NULL
;
1120 } else if (flags
& LOCK_STATE
)
1121 locks_remove_posix(filp
, (fl_owner_t
) stp
->st_stateowner
);
1122 put_nfs4_file(stp
->st_file
);
1123 kmem_cache_free(stateid_slab
, stp
);
1127 move_to_close_lru(struct nfs4_stateowner
*sop
)
1129 dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop
);
1131 list_move_tail(&sop
->so_close_lru
, &close_lru
);
1132 sop
->so_time
= get_seconds();
1136 same_owner_str(struct nfs4_stateowner
*sop
, struct xdr_netobj
*owner
,
1139 return (sop
->so_owner
.len
== owner
->len
) &&
1140 0 == memcmp(sop
->so_owner
.data
, owner
->data
, owner
->len
) &&
1141 (sop
->so_client
->cl_clientid
.cl_id
== clid
->cl_id
);
1144 static struct nfs4_stateowner
*
1145 find_openstateowner_str(unsigned int hashval
, struct nfsd4_open
*open
)
1147 struct nfs4_stateowner
*so
= NULL
;
1149 list_for_each_entry(so
, &ownerstr_hashtbl
[hashval
], so_strhash
) {
1150 if (same_owner_str(so
, &open
->op_owner
, &open
->op_clientid
))
1156 /* search file_hashtbl[] for file */
1157 static struct nfs4_file
*
1158 find_file(struct inode
*ino
)
1160 unsigned int hashval
= file_hashval(ino
);
1161 struct nfs4_file
*fp
;
1163 list_for_each_entry(fp
, &file_hashtbl
[hashval
], fi_hash
) {
1164 if (fp
->fi_inode
== ino
) {
1172 static int access_valid(u32 x
)
1174 return (x
> 0 && x
< 4);
1177 static int deny_valid(u32 x
)
1179 return (x
>= 0 && x
< 5);
1183 set_access(unsigned int *access
, unsigned long bmap
) {
1187 for (i
= 1; i
< 4; i
++) {
1188 if (test_bit(i
, &bmap
))
1194 set_deny(unsigned int *deny
, unsigned long bmap
) {
1198 for (i
= 0; i
< 4; i
++) {
1199 if (test_bit(i
, &bmap
))
1205 test_share(struct nfs4_stateid
*stp
, struct nfsd4_open
*open
) {
1206 unsigned int access
, deny
;
1208 set_access(&access
, stp
->st_access_bmap
);
1209 set_deny(&deny
, stp
->st_deny_bmap
);
1210 if ((access
& open
->op_share_deny
) || (deny
& open
->op_share_access
))
1216 * Called to check deny when READ with all zero stateid or
1217 * WRITE with all zero or all one stateid
1220 nfs4_share_conflict(struct svc_fh
*current_fh
, unsigned int deny_type
)
1222 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
1223 struct nfs4_file
*fp
;
1224 struct nfs4_stateid
*stp
;
1227 dprintk("NFSD: nfs4_share_conflict\n");
1229 fp
= find_file(ino
);
1232 ret
= nfserr_locked
;
1233 /* Search for conflicting share reservations */
1234 list_for_each_entry(stp
, &fp
->fi_stateids
, st_perfile
) {
1235 if (test_bit(deny_type
, &stp
->st_deny_bmap
) ||
1236 test_bit(NFS4_SHARE_DENY_BOTH
, &stp
->st_deny_bmap
))
1246 nfs4_file_downgrade(struct file
*filp
, unsigned int share_access
)
1248 if (share_access
& NFS4_SHARE_ACCESS_WRITE
) {
1249 put_write_access(filp
->f_path
.dentry
->d_inode
);
1250 filp
->f_mode
= (filp
->f_mode
| FMODE_READ
) & ~FMODE_WRITE
;
1255 * Recall a delegation
1258 do_recall(void *__dp
)
1260 struct nfs4_delegation
*dp
= __dp
;
1262 dp
->dl_file
->fi_had_conflict
= true;
1263 nfsd4_cb_recall(dp
);
1268 * Spawn a thread to perform a recall on the delegation represented
1269 * by the lease (file_lock)
1271 * Called from break_lease() with lock_kernel() held.
1272 * Note: we assume break_lease will only call this *once* for any given
1276 void nfsd_break_deleg_cb(struct file_lock
*fl
)
1278 struct nfs4_delegation
*dp
= (struct nfs4_delegation
*)fl
->fl_owner
;
1279 struct task_struct
*t
;
1281 dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp
,fl
);
1285 /* We're assuming the state code never drops its reference
1286 * without first removing the lease. Since we're in this lease
1287 * callback (and since the lease code is serialized by the kernel
1288 * lock) we know the server hasn't removed the lease yet, we know
1289 * it's safe to take a reference: */
1290 atomic_inc(&dp
->dl_count
);
1291 atomic_inc(&dp
->dl_client
->cl_count
);
1293 spin_lock(&recall_lock
);
1294 list_add_tail(&dp
->dl_recall_lru
, &del_recall_lru
);
1295 spin_unlock(&recall_lock
);
1297 /* only place dl_time is set. protected by lock_kernel*/
1298 dp
->dl_time
= get_seconds();
1301 * We don't want the locks code to timeout the lease for us;
1302 * we'll remove it ourself if the delegation isn't returned
1305 fl
->fl_break_time
= 0;
1307 t
= kthread_run(do_recall
, dp
, "%s", "nfs4_cb_recall");
1309 struct nfs4_client
*clp
= dp
->dl_client
;
1311 printk(KERN_INFO
"NFSD: Callback thread failed for "
1312 "for client (clientid %08x/%08x)\n",
1313 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
1314 put_nfs4_client(dp
->dl_client
);
1315 nfs4_put_delegation(dp
);
1320 * The file_lock is being reapd.
1322 * Called by locks_free_lock() with lock_kernel() held.
1325 void nfsd_release_deleg_cb(struct file_lock
*fl
)
1327 struct nfs4_delegation
*dp
= (struct nfs4_delegation
*)fl
->fl_owner
;
1329 dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl
,dp
, atomic_read(&dp
->dl_count
));
1331 if (!(fl
->fl_flags
& FL_LEASE
) || !dp
)
1333 dp
->dl_flock
= NULL
;
1337 * Set the delegation file_lock back pointer.
1339 * Called from setlease() with lock_kernel() held.
1342 void nfsd_copy_lock_deleg_cb(struct file_lock
*new, struct file_lock
*fl
)
1344 struct nfs4_delegation
*dp
= (struct nfs4_delegation
*)new->fl_owner
;
1346 dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp
);
1353 * Called from setlease() with lock_kernel() held
1356 int nfsd_same_client_deleg_cb(struct file_lock
*onlist
, struct file_lock
*try)
1358 struct nfs4_delegation
*onlistd
=
1359 (struct nfs4_delegation
*)onlist
->fl_owner
;
1360 struct nfs4_delegation
*tryd
=
1361 (struct nfs4_delegation
*)try->fl_owner
;
1363 if (onlist
->fl_lmops
!= try->fl_lmops
)
1366 return onlistd
->dl_client
== tryd
->dl_client
;
1371 int nfsd_change_deleg_cb(struct file_lock
**onlist
, int arg
)
1374 return lease_modify(onlist
, arg
);
1379 static struct lock_manager_operations nfsd_lease_mng_ops
= {
1380 .fl_break
= nfsd_break_deleg_cb
,
1381 .fl_release_private
= nfsd_release_deleg_cb
,
1382 .fl_copy_lock
= nfsd_copy_lock_deleg_cb
,
1383 .fl_mylease
= nfsd_same_client_deleg_cb
,
1384 .fl_change
= nfsd_change_deleg_cb
,
1389 nfsd4_process_open1(struct nfsd4_open
*open
)
1391 clientid_t
*clientid
= &open
->op_clientid
;
1392 struct nfs4_client
*clp
= NULL
;
1393 unsigned int strhashval
;
1394 struct nfs4_stateowner
*sop
= NULL
;
1396 if (!check_name(open
->op_owner
))
1397 return nfserr_inval
;
1399 if (STALE_CLIENTID(&open
->op_clientid
))
1400 return nfserr_stale_clientid
;
1402 strhashval
= ownerstr_hashval(clientid
->cl_id
, open
->op_owner
);
1403 sop
= find_openstateowner_str(strhashval
, open
);
1404 open
->op_stateowner
= sop
;
1406 /* Make sure the client's lease hasn't expired. */
1407 clp
= find_confirmed_client(clientid
);
1409 return nfserr_expired
;
1412 if (!sop
->so_confirmed
) {
1413 /* Replace unconfirmed owners without checking for replay. */
1414 clp
= sop
->so_client
;
1415 release_stateowner(sop
);
1416 open
->op_stateowner
= NULL
;
1419 if (open
->op_seqid
== sop
->so_seqid
- 1) {
1420 if (sop
->so_replay
.rp_buflen
)
1421 return nfserr_replay_me
;
1422 /* The original OPEN failed so spectacularly
1423 * that we don't even have replay data saved!
1424 * Therefore, we have no choice but to continue
1425 * processing this OPEN; presumably, we'll
1426 * fail again for the same reason.
1428 dprintk("nfsd4_process_open1: replay with no replay cache\n");
1431 if (open
->op_seqid
!= sop
->so_seqid
)
1432 return nfserr_bad_seqid
;
1434 if (open
->op_stateowner
== NULL
) {
1435 sop
= alloc_init_open_stateowner(strhashval
, clp
, open
);
1437 return nfserr_resource
;
1438 open
->op_stateowner
= sop
;
1440 list_del_init(&sop
->so_close_lru
);
1441 renew_client(sop
->so_client
);
1445 static inline __be32
1446 nfs4_check_delegmode(struct nfs4_delegation
*dp
, int flags
)
1448 if ((flags
& WR_STATE
) && (dp
->dl_type
== NFS4_OPEN_DELEGATE_READ
))
1449 return nfserr_openmode
;
1454 static struct nfs4_delegation
*
1455 find_delegation_file(struct nfs4_file
*fp
, stateid_t
*stid
)
1457 struct nfs4_delegation
*dp
;
1459 list_for_each_entry(dp
, &fp
->fi_delegations
, dl_perfile
) {
1460 if (dp
->dl_stateid
.si_stateownerid
== stid
->si_stateownerid
)
1467 nfs4_check_deleg(struct nfs4_file
*fp
, struct nfsd4_open
*open
,
1468 struct nfs4_delegation
**dp
)
1471 __be32 status
= nfserr_bad_stateid
;
1473 *dp
= find_delegation_file(fp
, &open
->op_delegate_stateid
);
1476 flags
= open
->op_share_access
== NFS4_SHARE_ACCESS_READ
?
1477 RD_STATE
: WR_STATE
;
1478 status
= nfs4_check_delegmode(*dp
, flags
);
1482 if (open
->op_claim_type
!= NFS4_OPEN_CLAIM_DELEGATE_CUR
)
1486 open
->op_stateowner
->so_confirmed
= 1;
1491 nfs4_check_open(struct nfs4_file
*fp
, struct nfsd4_open
*open
, struct nfs4_stateid
**stpp
)
1493 struct nfs4_stateid
*local
;
1494 __be32 status
= nfserr_share_denied
;
1495 struct nfs4_stateowner
*sop
= open
->op_stateowner
;
1497 list_for_each_entry(local
, &fp
->fi_stateids
, st_perfile
) {
1498 /* ignore lock owners */
1499 if (local
->st_stateowner
->so_is_open_owner
== 0)
1501 /* remember if we have seen this open owner */
1502 if (local
->st_stateowner
== sop
)
1504 /* check for conflicting share reservations */
1505 if (!test_share(local
, open
))
1513 static inline struct nfs4_stateid
*
1514 nfs4_alloc_stateid(void)
1516 return kmem_cache_alloc(stateid_slab
, GFP_KERNEL
);
1520 nfs4_new_open(struct svc_rqst
*rqstp
, struct nfs4_stateid
**stpp
,
1521 struct nfs4_delegation
*dp
,
1522 struct svc_fh
*cur_fh
, int flags
)
1524 struct nfs4_stateid
*stp
;
1526 stp
= nfs4_alloc_stateid();
1528 return nfserr_resource
;
1531 get_file(dp
->dl_vfs_file
);
1532 stp
->st_vfs_file
= dp
->dl_vfs_file
;
1535 status
= nfsd_open(rqstp
, cur_fh
, S_IFREG
, flags
,
1538 if (status
== nfserr_dropit
)
1539 status
= nfserr_jukebox
;
1540 kmem_cache_free(stateid_slab
, stp
);
1548 static inline __be32
1549 nfsd4_truncate(struct svc_rqst
*rqstp
, struct svc_fh
*fh
,
1550 struct nfsd4_open
*open
)
1552 struct iattr iattr
= {
1553 .ia_valid
= ATTR_SIZE
,
1556 if (!open
->op_truncate
)
1558 if (!(open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
))
1559 return nfserr_inval
;
1560 return nfsd_setattr(rqstp
, fh
, &iattr
, 0, (time_t)0);
1564 nfs4_upgrade_open(struct svc_rqst
*rqstp
, struct svc_fh
*cur_fh
, struct nfs4_stateid
*stp
, struct nfsd4_open
*open
)
1566 struct file
*filp
= stp
->st_vfs_file
;
1567 struct inode
*inode
= filp
->f_path
.dentry
->d_inode
;
1568 unsigned int share_access
, new_writer
;
1571 set_access(&share_access
, stp
->st_access_bmap
);
1572 new_writer
= (~share_access
) & open
->op_share_access
1573 & NFS4_SHARE_ACCESS_WRITE
;
1576 int err
= get_write_access(inode
);
1578 return nfserrno(err
);
1580 status
= nfsd4_truncate(rqstp
, cur_fh
, open
);
1583 put_write_access(inode
);
1586 /* remember the open */
1587 filp
->f_mode
|= open
->op_share_access
;
1588 set_bit(open
->op_share_access
, &stp
->st_access_bmap
);
1589 set_bit(open
->op_share_deny
, &stp
->st_deny_bmap
);
1596 nfs4_set_claim_prev(struct nfsd4_open
*open
)
1598 open
->op_stateowner
->so_confirmed
= 1;
1599 open
->op_stateowner
->so_client
->cl_firststate
= 1;
1603 * Attempt to hand out a delegation.
1606 nfs4_open_delegation(struct svc_fh
*fh
, struct nfsd4_open
*open
, struct nfs4_stateid
*stp
)
1608 struct nfs4_delegation
*dp
;
1609 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
1610 struct nfs4_callback
*cb
= &sop
->so_client
->cl_callback
;
1611 struct file_lock fl
, *flp
= &fl
;
1612 int status
, flag
= 0;
1614 flag
= NFS4_OPEN_DELEGATE_NONE
;
1615 open
->op_recall
= 0;
1616 switch (open
->op_claim_type
) {
1617 case NFS4_OPEN_CLAIM_PREVIOUS
:
1618 if (!atomic_read(&cb
->cb_set
))
1619 open
->op_recall
= 1;
1620 flag
= open
->op_delegate_type
;
1621 if (flag
== NFS4_OPEN_DELEGATE_NONE
)
1624 case NFS4_OPEN_CLAIM_NULL
:
1625 /* Let's not give out any delegations till everyone's
1626 * had the chance to reclaim theirs.... */
1627 if (nfs4_in_grace())
1629 if (!atomic_read(&cb
->cb_set
) || !sop
->so_confirmed
)
1631 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
1632 flag
= NFS4_OPEN_DELEGATE_WRITE
;
1634 flag
= NFS4_OPEN_DELEGATE_READ
;
1640 dp
= alloc_init_deleg(sop
->so_client
, stp
, fh
, flag
);
1642 flag
= NFS4_OPEN_DELEGATE_NONE
;
1645 locks_init_lock(&fl
);
1646 fl
.fl_lmops
= &nfsd_lease_mng_ops
;
1647 fl
.fl_flags
= FL_LEASE
;
1648 fl
.fl_end
= OFFSET_MAX
;
1649 fl
.fl_owner
= (fl_owner_t
)dp
;
1650 fl
.fl_file
= stp
->st_vfs_file
;
1651 fl
.fl_pid
= current
->tgid
;
1653 /* vfs_setlease checks to see if delegation should be handed out.
1654 * the lock_manager callbacks fl_mylease and fl_change are used
1656 if ((status
= vfs_setlease(stp
->st_vfs_file
,
1657 flag
== NFS4_OPEN_DELEGATE_READ
? F_RDLCK
: F_WRLCK
, &flp
))) {
1658 dprintk("NFSD: setlease failed [%d], no delegation\n", status
);
1659 unhash_delegation(dp
);
1660 flag
= NFS4_OPEN_DELEGATE_NONE
;
1664 memcpy(&open
->op_delegate_stateid
, &dp
->dl_stateid
, sizeof(dp
->dl_stateid
));
1666 dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n",
1667 dp
->dl_stateid
.si_boot
,
1668 dp
->dl_stateid
.si_stateownerid
,
1669 dp
->dl_stateid
.si_fileid
,
1670 dp
->dl_stateid
.si_generation
);
1672 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
1673 && flag
== NFS4_OPEN_DELEGATE_NONE
1674 && open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_NONE
)
1675 dprintk("NFSD: WARNING: refusing delegation reclaim\n");
1676 open
->op_delegate_type
= flag
;
1680 * called with nfs4_lock_state() held.
1683 nfsd4_process_open2(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
1685 struct nfs4_file
*fp
= NULL
;
1686 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
1687 struct nfs4_stateid
*stp
= NULL
;
1688 struct nfs4_delegation
*dp
= NULL
;
1691 status
= nfserr_inval
;
1692 if (!access_valid(open
->op_share_access
)
1693 || !deny_valid(open
->op_share_deny
))
1696 * Lookup file; if found, lookup stateid and check open request,
1697 * and check for delegations in the process of being recalled.
1698 * If not found, create the nfs4_file struct
1700 fp
= find_file(ino
);
1702 if ((status
= nfs4_check_open(fp
, open
, &stp
)))
1704 status
= nfs4_check_deleg(fp
, open
, &dp
);
1708 status
= nfserr_bad_stateid
;
1709 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
)
1711 status
= nfserr_resource
;
1712 fp
= alloc_init_file(ino
);
1718 * OPEN the file, or upgrade an existing OPEN.
1719 * If truncate fails, the OPEN fails.
1722 /* Stateid was found, this is an OPEN upgrade */
1723 status
= nfs4_upgrade_open(rqstp
, current_fh
, stp
, open
);
1726 update_stateid(&stp
->st_stateid
);
1728 /* Stateid was not found, this is a new OPEN */
1730 if (open
->op_share_access
& NFS4_SHARE_ACCESS_READ
)
1732 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
1734 status
= nfs4_new_open(rqstp
, &stp
, dp
, current_fh
, flags
);
1737 init_stateid(stp
, fp
, open
);
1738 status
= nfsd4_truncate(rqstp
, current_fh
, open
);
1740 release_stateid(stp
, OPEN_STATE
);
1744 memcpy(&open
->op_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
1747 * Attempt to hand out a delegation. No error return, because the
1748 * OPEN succeeds even if we fail.
1750 nfs4_open_delegation(current_fh
, open
, stp
);
1754 dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n",
1755 stp
->st_stateid
.si_boot
, stp
->st_stateid
.si_stateownerid
,
1756 stp
->st_stateid
.si_fileid
, stp
->st_stateid
.si_generation
);
1760 if (status
== 0 && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
1761 nfs4_set_claim_prev(open
);
1763 * To finish the open response, we just need to set the rflags.
1765 open
->op_rflags
= NFS4_OPEN_RESULT_LOCKTYPE_POSIX
;
1766 if (!open
->op_stateowner
->so_confirmed
)
1767 open
->op_rflags
|= NFS4_OPEN_RESULT_CONFIRM
;
1772 static struct workqueue_struct
*laundry_wq
;
1773 static void laundromat_main(struct work_struct
*);
1774 static DECLARE_DELAYED_WORK(laundromat_work
, laundromat_main
);
1777 nfsd4_renew(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
1780 struct nfs4_client
*clp
;
1784 dprintk("process_renew(%08x/%08x): starting\n",
1785 clid
->cl_boot
, clid
->cl_id
);
1786 status
= nfserr_stale_clientid
;
1787 if (STALE_CLIENTID(clid
))
1789 clp
= find_confirmed_client(clid
);
1790 status
= nfserr_expired
;
1792 /* We assume the client took too long to RENEW. */
1793 dprintk("nfsd4_renew: clientid not found!\n");
1797 status
= nfserr_cb_path_down
;
1798 if (!list_empty(&clp
->cl_delegations
)
1799 && !atomic_read(&clp
->cl_callback
.cb_set
))
1803 nfs4_unlock_state();
1810 dprintk("NFSD: end of grace period\n");
1811 nfsd4_recdir_purge_old();
1816 nfs4_laundromat(void)
1818 struct nfs4_client
*clp
;
1819 struct nfs4_stateowner
*sop
;
1820 struct nfs4_delegation
*dp
;
1821 struct list_head
*pos
, *next
, reaplist
;
1822 time_t cutoff
= get_seconds() - NFSD_LEASE_TIME
;
1823 time_t t
, clientid_val
= NFSD_LEASE_TIME
;
1824 time_t u
, test_val
= NFSD_LEASE_TIME
;
1828 dprintk("NFSD: laundromat service - starting\n");
1831 list_for_each_safe(pos
, next
, &client_lru
) {
1832 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
1833 if (time_after((unsigned long)clp
->cl_time
, (unsigned long)cutoff
)) {
1834 t
= clp
->cl_time
- cutoff
;
1835 if (clientid_val
> t
)
1839 dprintk("NFSD: purging unused client (clientid %08x)\n",
1840 clp
->cl_clientid
.cl_id
);
1841 nfsd4_remove_clid_dir(clp
);
1844 INIT_LIST_HEAD(&reaplist
);
1845 spin_lock(&recall_lock
);
1846 list_for_each_safe(pos
, next
, &del_recall_lru
) {
1847 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
1848 if (time_after((unsigned long)dp
->dl_time
, (unsigned long)cutoff
)) {
1849 u
= dp
->dl_time
- cutoff
;
1854 dprintk("NFSD: purging unused delegation dp %p, fp %p\n",
1856 list_move(&dp
->dl_recall_lru
, &reaplist
);
1858 spin_unlock(&recall_lock
);
1859 list_for_each_safe(pos
, next
, &reaplist
) {
1860 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
1861 list_del_init(&dp
->dl_recall_lru
);
1862 unhash_delegation(dp
);
1864 test_val
= NFSD_LEASE_TIME
;
1865 list_for_each_safe(pos
, next
, &close_lru
) {
1866 sop
= list_entry(pos
, struct nfs4_stateowner
, so_close_lru
);
1867 if (time_after((unsigned long)sop
->so_time
, (unsigned long)cutoff
)) {
1868 u
= sop
->so_time
- cutoff
;
1873 dprintk("NFSD: purging unused open stateowner (so_id %d)\n",
1875 release_stateowner(sop
);
1877 if (clientid_val
< NFSD_LAUNDROMAT_MINTIMEOUT
)
1878 clientid_val
= NFSD_LAUNDROMAT_MINTIMEOUT
;
1879 nfs4_unlock_state();
1880 return clientid_val
;
1884 laundromat_main(struct work_struct
*not_used
)
1888 t
= nfs4_laundromat();
1889 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t
);
1890 queue_delayed_work(laundry_wq
, &laundromat_work
, t
*HZ
);
1893 static struct nfs4_stateowner
*
1894 search_close_lru(u32 st_id
, int flags
)
1896 struct nfs4_stateowner
*local
= NULL
;
1898 if (flags
& CLOSE_STATE
) {
1899 list_for_each_entry(local
, &close_lru
, so_close_lru
) {
1900 if (local
->so_id
== st_id
)
1908 nfs4_check_fh(struct svc_fh
*fhp
, struct nfs4_stateid
*stp
)
1910 return fhp
->fh_dentry
->d_inode
!= stp
->st_vfs_file
->f_path
.dentry
->d_inode
;
1914 STALE_STATEID(stateid_t
*stateid
)
1916 if (stateid
->si_boot
== boot_time
)
1918 dprintk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n",
1919 stateid
->si_boot
, stateid
->si_stateownerid
, stateid
->si_fileid
,
1920 stateid
->si_generation
);
1925 access_permit_read(unsigned long access_bmap
)
1927 return test_bit(NFS4_SHARE_ACCESS_READ
, &access_bmap
) ||
1928 test_bit(NFS4_SHARE_ACCESS_BOTH
, &access_bmap
) ||
1929 test_bit(NFS4_SHARE_ACCESS_WRITE
, &access_bmap
);
1933 access_permit_write(unsigned long access_bmap
)
1935 return test_bit(NFS4_SHARE_ACCESS_WRITE
, &access_bmap
) ||
1936 test_bit(NFS4_SHARE_ACCESS_BOTH
, &access_bmap
);
1940 __be32
nfs4_check_openmode(struct nfs4_stateid
*stp
, int flags
)
1942 __be32 status
= nfserr_openmode
;
1944 if ((flags
& WR_STATE
) && (!access_permit_write(stp
->st_access_bmap
)))
1946 if ((flags
& RD_STATE
) && (!access_permit_read(stp
->st_access_bmap
)))
1953 static inline __be32
1954 check_special_stateids(svc_fh
*current_fh
, stateid_t
*stateid
, int flags
)
1956 /* Trying to call delegreturn with a special stateid? Yuch: */
1957 if (!(flags
& (RD_STATE
| WR_STATE
)))
1958 return nfserr_bad_stateid
;
1959 else if (ONE_STATEID(stateid
) && (flags
& RD_STATE
))
1961 else if (nfs4_in_grace()) {
1962 /* Answer in remaining cases depends on existance of
1963 * conflicting state; so we must wait out the grace period. */
1964 return nfserr_grace
;
1965 } else if (flags
& WR_STATE
)
1966 return nfs4_share_conflict(current_fh
,
1967 NFS4_SHARE_DENY_WRITE
);
1968 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
1969 return nfs4_share_conflict(current_fh
,
1970 NFS4_SHARE_DENY_READ
);
1974 * Allow READ/WRITE during grace period on recovered state only for files
1975 * that are not able to provide mandatory locking.
1978 io_during_grace_disallowed(struct inode
*inode
, int flags
)
1980 return nfs4_in_grace() && (flags
& (RD_STATE
| WR_STATE
))
1981 && mandatory_lock(inode
);
1985 * Checks for stateid operations
1988 nfs4_preprocess_stateid_op(struct svc_fh
*current_fh
, stateid_t
*stateid
, int flags
, struct file
**filpp
)
1990 struct nfs4_stateid
*stp
= NULL
;
1991 struct nfs4_delegation
*dp
= NULL
;
1993 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
1996 dprintk("NFSD: preprocess_stateid_op: stateid = (%08x/%08x/%08x/%08x)\n",
1997 stateid
->si_boot
, stateid
->si_stateownerid
,
1998 stateid
->si_fileid
, stateid
->si_generation
);
2002 if (io_during_grace_disallowed(ino
, flags
))
2003 return nfserr_grace
;
2005 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
2006 return check_special_stateids(current_fh
, stateid
, flags
);
2009 status
= nfserr_stale_stateid
;
2010 if (STALE_STATEID(stateid
))
2014 status
= nfserr_bad_stateid
;
2015 if (!stateid
->si_fileid
) { /* delegation stateid */
2016 if(!(dp
= find_delegation_stateid(ino
, stateid
))) {
2017 dprintk("NFSD: delegation stateid not found\n");
2020 stidp
= &dp
->dl_stateid
;
2021 } else { /* open or lock stateid */
2022 if (!(stp
= find_stateid(stateid
, flags
))) {
2023 dprintk("NFSD: open or lock stateid not found\n");
2026 if ((flags
& CHECK_FH
) && nfs4_check_fh(current_fh
, stp
))
2028 if (!stp
->st_stateowner
->so_confirmed
)
2030 stidp
= &stp
->st_stateid
;
2032 if (stateid
->si_generation
> stidp
->si_generation
)
2036 status
= nfserr_old_stateid
;
2037 if (stateid
->si_generation
< stidp
->si_generation
)
2040 if ((status
= nfs4_check_openmode(stp
,flags
)))
2042 renew_client(stp
->st_stateowner
->so_client
);
2044 *filpp
= stp
->st_vfs_file
;
2046 if ((status
= nfs4_check_delegmode(dp
, flags
)))
2048 renew_client(dp
->dl_client
);
2049 if (flags
& DELEG_RET
)
2050 unhash_delegation(dp
);
2052 *filpp
= dp
->dl_vfs_file
;
2062 return (type
== NFS4_READW_LT
|| type
== NFS4_READ_LT
) ?
2063 RD_STATE
: WR_STATE
;
2067 * Checks for sequence id mutating operations.
2070 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
)
2072 struct nfs4_stateid
*stp
;
2073 struct nfs4_stateowner
*sop
;
2075 dprintk("NFSD: preprocess_seqid_op: seqid=%d "
2076 "stateid = (%08x/%08x/%08x/%08x)\n", seqid
,
2077 stateid
->si_boot
, stateid
->si_stateownerid
, stateid
->si_fileid
,
2078 stateid
->si_generation
);
2083 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
)) {
2084 dprintk("NFSD: preprocess_seqid_op: magic stateid!\n");
2085 return nfserr_bad_stateid
;
2088 if (STALE_STATEID(stateid
))
2089 return nfserr_stale_stateid
;
2091 * We return BAD_STATEID if filehandle doesn't match stateid,
2092 * the confirmed flag is incorrecly set, or the generation
2093 * number is incorrect.
2095 stp
= find_stateid(stateid
, flags
);
2098 * Also, we should make sure this isn't just the result of
2101 sop
= search_close_lru(stateid
->si_stateownerid
, flags
);
2103 return nfserr_bad_stateid
;
2109 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
2110 clientid_t
*lockclid
= &lock
->v
.new.clientid
;
2111 struct nfs4_client
*clp
= sop
->so_client
;
2115 lkflg
= setlkflg(lock
->lk_type
);
2117 if (lock
->lk_is_new
) {
2118 if (!sop
->so_is_open_owner
)
2119 return nfserr_bad_stateid
;
2120 if (!same_clid(&clp
->cl_clientid
, lockclid
))
2121 return nfserr_bad_stateid
;
2122 /* stp is the open stateid */
2123 status
= nfs4_check_openmode(stp
, lkflg
);
2127 /* stp is the lock stateid */
2128 status
= nfs4_check_openmode(stp
->st_openstp
, lkflg
);
2134 if ((flags
& CHECK_FH
) && nfs4_check_fh(current_fh
, stp
)) {
2135 dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n");
2136 return nfserr_bad_stateid
;
2140 *sopp
= sop
= stp
->st_stateowner
;
2143 * We now validate the seqid and stateid generation numbers.
2144 * For the moment, we ignore the possibility of
2145 * generation number wraparound.
2147 if (seqid
!= sop
->so_seqid
)
2150 if (sop
->so_confirmed
&& flags
& CONFIRM
) {
2151 dprintk("NFSD: preprocess_seqid_op: expected"
2152 " unconfirmed stateowner!\n");
2153 return nfserr_bad_stateid
;
2155 if (!sop
->so_confirmed
&& !(flags
& CONFIRM
)) {
2156 dprintk("NFSD: preprocess_seqid_op: stateowner not"
2157 " confirmed yet!\n");
2158 return nfserr_bad_stateid
;
2160 if (stateid
->si_generation
> stp
->st_stateid
.si_generation
) {
2161 dprintk("NFSD: preprocess_seqid_op: future stateid?!\n");
2162 return nfserr_bad_stateid
;
2165 if (stateid
->si_generation
< stp
->st_stateid
.si_generation
) {
2166 dprintk("NFSD: preprocess_seqid_op: old stateid!\n");
2167 return nfserr_old_stateid
;
2169 renew_client(sop
->so_client
);
2173 if (seqid
== sop
->so_seqid
- 1) {
2174 dprintk("NFSD: preprocess_seqid_op: retransmission?\n");
2175 /* indicate replay to calling function */
2176 return nfserr_replay_me
;
2178 dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n",
2179 sop
->so_seqid
, seqid
);
2181 return nfserr_bad_seqid
;
2185 nfsd4_open_confirm(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2186 struct nfsd4_open_confirm
*oc
)
2189 struct nfs4_stateowner
*sop
;
2190 struct nfs4_stateid
*stp
;
2192 dprintk("NFSD: nfsd4_open_confirm on file %.*s\n",
2193 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
2194 cstate
->current_fh
.fh_dentry
->d_name
.name
);
2196 status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0);
2202 if ((status
= nfs4_preprocess_seqid_op(&cstate
->current_fh
,
2203 oc
->oc_seqid
, &oc
->oc_req_stateid
,
2204 CHECK_FH
| CONFIRM
| OPEN_STATE
,
2205 &oc
->oc_stateowner
, &stp
, NULL
)))
2208 sop
= oc
->oc_stateowner
;
2209 sop
->so_confirmed
= 1;
2210 update_stateid(&stp
->st_stateid
);
2211 memcpy(&oc
->oc_resp_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
2212 dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d "
2213 "stateid=(%08x/%08x/%08x/%08x)\n", oc
->oc_seqid
,
2214 stp
->st_stateid
.si_boot
,
2215 stp
->st_stateid
.si_stateownerid
,
2216 stp
->st_stateid
.si_fileid
,
2217 stp
->st_stateid
.si_generation
);
2219 nfsd4_create_clid_dir(sop
->so_client
);
2221 if (oc
->oc_stateowner
) {
2222 nfs4_get_stateowner(oc
->oc_stateowner
);
2223 cstate
->replay_owner
= oc
->oc_stateowner
;
2225 nfs4_unlock_state();
2231 * unset all bits in union bitmap (bmap) that
2232 * do not exist in share (from successful OPEN_DOWNGRADE)
2235 reset_union_bmap_access(unsigned long access
, unsigned long *bmap
)
2238 for (i
= 1; i
< 4; i
++) {
2239 if ((i
& access
) != i
)
2240 __clear_bit(i
, bmap
);
2245 reset_union_bmap_deny(unsigned long deny
, unsigned long *bmap
)
2248 for (i
= 0; i
< 4; i
++) {
2249 if ((i
& deny
) != i
)
2250 __clear_bit(i
, bmap
);
2255 nfsd4_open_downgrade(struct svc_rqst
*rqstp
,
2256 struct nfsd4_compound_state
*cstate
,
2257 struct nfsd4_open_downgrade
*od
)
2260 struct nfs4_stateid
*stp
;
2261 unsigned int share_access
;
2263 dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n",
2264 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
2265 cstate
->current_fh
.fh_dentry
->d_name
.name
);
2267 if (!access_valid(od
->od_share_access
)
2268 || !deny_valid(od
->od_share_deny
))
2269 return nfserr_inval
;
2272 if ((status
= nfs4_preprocess_seqid_op(&cstate
->current_fh
,
2275 CHECK_FH
| OPEN_STATE
,
2276 &od
->od_stateowner
, &stp
, NULL
)))
2279 status
= nfserr_inval
;
2280 if (!test_bit(od
->od_share_access
, &stp
->st_access_bmap
)) {
2281 dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n",
2282 stp
->st_access_bmap
, od
->od_share_access
);
2285 if (!test_bit(od
->od_share_deny
, &stp
->st_deny_bmap
)) {
2286 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
2287 stp
->st_deny_bmap
, od
->od_share_deny
);
2290 set_access(&share_access
, stp
->st_access_bmap
);
2291 nfs4_file_downgrade(stp
->st_vfs_file
,
2292 share_access
& ~od
->od_share_access
);
2294 reset_union_bmap_access(od
->od_share_access
, &stp
->st_access_bmap
);
2295 reset_union_bmap_deny(od
->od_share_deny
, &stp
->st_deny_bmap
);
2297 update_stateid(&stp
->st_stateid
);
2298 memcpy(&od
->od_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
2301 if (od
->od_stateowner
) {
2302 nfs4_get_stateowner(od
->od_stateowner
);
2303 cstate
->replay_owner
= od
->od_stateowner
;
2305 nfs4_unlock_state();
2310 * nfs4_unlock_state() called after encode
2313 nfsd4_close(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2314 struct nfsd4_close
*close
)
2317 struct nfs4_stateid
*stp
;
2319 dprintk("NFSD: nfsd4_close on file %.*s\n",
2320 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
2321 cstate
->current_fh
.fh_dentry
->d_name
.name
);
2324 /* check close_lru for replay */
2325 if ((status
= nfs4_preprocess_seqid_op(&cstate
->current_fh
,
2328 CHECK_FH
| OPEN_STATE
| CLOSE_STATE
,
2329 &close
->cl_stateowner
, &stp
, NULL
)))
2332 update_stateid(&stp
->st_stateid
);
2333 memcpy(&close
->cl_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
2335 /* release_stateid() calls nfsd_close() if needed */
2336 release_stateid(stp
, OPEN_STATE
);
2338 /* place unused nfs4_stateowners on so_close_lru list to be
2339 * released by the laundromat service after the lease period
2340 * to enable us to handle CLOSE replay
2342 if (list_empty(&close
->cl_stateowner
->so_stateids
))
2343 move_to_close_lru(close
->cl_stateowner
);
2345 if (close
->cl_stateowner
) {
2346 nfs4_get_stateowner(close
->cl_stateowner
);
2347 cstate
->replay_owner
= close
->cl_stateowner
;
2349 nfs4_unlock_state();
2354 nfsd4_delegreturn(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2355 struct nfsd4_delegreturn
*dr
)
2359 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
2363 status
= nfs4_preprocess_stateid_op(&cstate
->current_fh
,
2364 &dr
->dr_stateid
, DELEG_RET
, NULL
);
2365 nfs4_unlock_state();
2372 * Lock owner state (byte-range locks)
2374 #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
2375 #define LOCK_HASH_BITS 8
2376 #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS)
2377 #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1)
2379 #define lockownerid_hashval(id) \
2380 ((id) & LOCK_HASH_MASK)
2382 static inline unsigned int
2383 lock_ownerstr_hashval(struct inode
*inode
, u32 cl_id
,
2384 struct xdr_netobj
*ownername
)
2386 return (file_hashval(inode
) + cl_id
2387 + opaque_hashval(ownername
->data
, ownername
->len
))
2391 static struct list_head lock_ownerid_hashtbl
[LOCK_HASH_SIZE
];
2392 static struct list_head lock_ownerstr_hashtbl
[LOCK_HASH_SIZE
];
2393 static struct list_head lockstateid_hashtbl
[STATEID_HASH_SIZE
];
2395 static struct nfs4_stateid
*
2396 find_stateid(stateid_t
*stid
, int flags
)
2398 struct nfs4_stateid
*local
= NULL
;
2399 u32 st_id
= stid
->si_stateownerid
;
2400 u32 f_id
= stid
->si_fileid
;
2401 unsigned int hashval
;
2403 dprintk("NFSD: find_stateid flags 0x%x\n",flags
);
2404 if ((flags
& LOCK_STATE
) || (flags
& RD_STATE
) || (flags
& WR_STATE
)) {
2405 hashval
= stateid_hashval(st_id
, f_id
);
2406 list_for_each_entry(local
, &lockstateid_hashtbl
[hashval
], st_hash
) {
2407 if ((local
->st_stateid
.si_stateownerid
== st_id
) &&
2408 (local
->st_stateid
.si_fileid
== f_id
))
2412 if ((flags
& OPEN_STATE
) || (flags
& RD_STATE
) || (flags
& WR_STATE
)) {
2413 hashval
= stateid_hashval(st_id
, f_id
);
2414 list_for_each_entry(local
, &stateid_hashtbl
[hashval
], st_hash
) {
2415 if ((local
->st_stateid
.si_stateownerid
== st_id
) &&
2416 (local
->st_stateid
.si_fileid
== f_id
))
2423 static struct nfs4_delegation
*
2424 find_delegation_stateid(struct inode
*ino
, stateid_t
*stid
)
2426 struct nfs4_file
*fp
;
2427 struct nfs4_delegation
*dl
;
2429 dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n",
2430 stid
->si_boot
, stid
->si_stateownerid
,
2431 stid
->si_fileid
, stid
->si_generation
);
2433 fp
= find_file(ino
);
2436 dl
= find_delegation_file(fp
, stid
);
2442 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
2443 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
2444 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
2445 * locking, this prevents us from being completely protocol-compliant. The
2446 * real solution to this problem is to start using unsigned file offsets in
2447 * the VFS, but this is a very deep change!
2450 nfs4_transform_lock_offset(struct file_lock
*lock
)
2452 if (lock
->fl_start
< 0)
2453 lock
->fl_start
= OFFSET_MAX
;
2454 if (lock
->fl_end
< 0)
2455 lock
->fl_end
= OFFSET_MAX
;
2458 /* Hack!: For now, we're defining this just so we can use a pointer to it
2459 * as a unique cookie to identify our (NFSv4's) posix locks. */
2460 static struct lock_manager_operations nfsd_posix_mng_ops
= {
2464 nfs4_set_lock_denied(struct file_lock
*fl
, struct nfsd4_lock_denied
*deny
)
2466 struct nfs4_stateowner
*sop
;
2469 if (fl
->fl_lmops
== &nfsd_posix_mng_ops
) {
2470 sop
= (struct nfs4_stateowner
*) fl
->fl_owner
;
2471 hval
= lockownerid_hashval(sop
->so_id
);
2472 kref_get(&sop
->so_ref
);
2474 deny
->ld_clientid
= sop
->so_client
->cl_clientid
;
2476 deny
->ld_sop
= NULL
;
2477 deny
->ld_clientid
.cl_boot
= 0;
2478 deny
->ld_clientid
.cl_id
= 0;
2480 deny
->ld_start
= fl
->fl_start
;
2481 deny
->ld_length
= ~(u64
)0;
2482 if (fl
->fl_end
!= ~(u64
)0)
2483 deny
->ld_length
= fl
->fl_end
- fl
->fl_start
+ 1;
2484 deny
->ld_type
= NFS4_READ_LT
;
2485 if (fl
->fl_type
!= F_RDLCK
)
2486 deny
->ld_type
= NFS4_WRITE_LT
;
2489 static struct nfs4_stateowner
*
2490 find_lockstateowner_str(struct inode
*inode
, clientid_t
*clid
,
2491 struct xdr_netobj
*owner
)
2493 unsigned int hashval
= lock_ownerstr_hashval(inode
, clid
->cl_id
, owner
);
2494 struct nfs4_stateowner
*op
;
2496 list_for_each_entry(op
, &lock_ownerstr_hashtbl
[hashval
], so_strhash
) {
2497 if (same_owner_str(op
, owner
, clid
))
2504 * Alloc a lock owner structure.
2505 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
2508 * strhashval = lock_ownerstr_hashval
2511 static struct nfs4_stateowner
*
2512 alloc_init_lock_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_stateid
*open_stp
, struct nfsd4_lock
*lock
) {
2513 struct nfs4_stateowner
*sop
;
2514 struct nfs4_replay
*rp
;
2515 unsigned int idhashval
;
2517 if (!(sop
= alloc_stateowner(&lock
->lk_new_owner
)))
2519 idhashval
= lockownerid_hashval(current_ownerid
);
2520 INIT_LIST_HEAD(&sop
->so_idhash
);
2521 INIT_LIST_HEAD(&sop
->so_strhash
);
2522 INIT_LIST_HEAD(&sop
->so_perclient
);
2523 INIT_LIST_HEAD(&sop
->so_stateids
);
2524 INIT_LIST_HEAD(&sop
->so_perstateid
);
2525 INIT_LIST_HEAD(&sop
->so_close_lru
); /* not used */
2527 list_add(&sop
->so_idhash
, &lock_ownerid_hashtbl
[idhashval
]);
2528 list_add(&sop
->so_strhash
, &lock_ownerstr_hashtbl
[strhashval
]);
2529 list_add(&sop
->so_perstateid
, &open_stp
->st_lockowners
);
2530 sop
->so_is_open_owner
= 0;
2531 sop
->so_id
= current_ownerid
++;
2532 sop
->so_client
= clp
;
2533 /* It is the openowner seqid that will be incremented in encode in the
2534 * case of new lockowners; so increment the lock seqid manually: */
2535 sop
->so_seqid
= lock
->lk_new_lock_seqid
+ 1;
2536 sop
->so_confirmed
= 1;
2537 rp
= &sop
->so_replay
;
2538 rp
->rp_status
= nfserr_serverfault
;
2540 rp
->rp_buf
= rp
->rp_ibuf
;
2544 static struct nfs4_stateid
*
2545 alloc_init_lock_stateid(struct nfs4_stateowner
*sop
, struct nfs4_file
*fp
, struct nfs4_stateid
*open_stp
)
2547 struct nfs4_stateid
*stp
;
2548 unsigned int hashval
= stateid_hashval(sop
->so_id
, fp
->fi_id
);
2550 stp
= nfs4_alloc_stateid();
2553 INIT_LIST_HEAD(&stp
->st_hash
);
2554 INIT_LIST_HEAD(&stp
->st_perfile
);
2555 INIT_LIST_HEAD(&stp
->st_perstateowner
);
2556 INIT_LIST_HEAD(&stp
->st_lockowners
); /* not used */
2557 list_add(&stp
->st_hash
, &lockstateid_hashtbl
[hashval
]);
2558 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
2559 list_add(&stp
->st_perstateowner
, &sop
->so_stateids
);
2560 stp
->st_stateowner
= sop
;
2563 stp
->st_stateid
.si_boot
= boot_time
;
2564 stp
->st_stateid
.si_stateownerid
= sop
->so_id
;
2565 stp
->st_stateid
.si_fileid
= fp
->fi_id
;
2566 stp
->st_stateid
.si_generation
= 0;
2567 stp
->st_vfs_file
= open_stp
->st_vfs_file
; /* FIXME refcount?? */
2568 stp
->st_access_bmap
= open_stp
->st_access_bmap
;
2569 stp
->st_deny_bmap
= open_stp
->st_deny_bmap
;
2570 stp
->st_openstp
= open_stp
;
2577 check_lock_length(u64 offset
, u64 length
)
2579 return ((length
== 0) || ((length
!= ~(u64
)0) &&
2580 LOFF_OVERFLOW(offset
, length
)));
2587 nfsd4_lock(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2588 struct nfsd4_lock
*lock
)
2590 struct nfs4_stateowner
*open_sop
= NULL
;
2591 struct nfs4_stateowner
*lock_sop
= NULL
;
2592 struct nfs4_stateid
*lock_stp
;
2594 struct file_lock file_lock
;
2595 struct file_lock conflock
;
2597 unsigned int strhashval
;
2601 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
2602 (long long) lock
->lk_offset
,
2603 (long long) lock
->lk_length
);
2605 if (check_lock_length(lock
->lk_offset
, lock
->lk_length
))
2606 return nfserr_inval
;
2608 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
,
2609 S_IFREG
, MAY_LOCK
))) {
2610 dprintk("NFSD: nfsd4_lock: permission denied!\n");
2616 if (lock
->lk_is_new
) {
2618 * Client indicates that this is a new lockowner.
2619 * Use open owner and open stateid to create lock owner and
2622 struct nfs4_stateid
*open_stp
= NULL
;
2623 struct nfs4_file
*fp
;
2625 status
= nfserr_stale_clientid
;
2626 if (STALE_CLIENTID(&lock
->lk_new_clientid
))
2629 /* validate and update open stateid and open seqid */
2630 status
= nfs4_preprocess_seqid_op(&cstate
->current_fh
,
2631 lock
->lk_new_open_seqid
,
2632 &lock
->lk_new_open_stateid
,
2633 CHECK_FH
| OPEN_STATE
,
2634 &lock
->lk_replay_owner
, &open_stp
,
2638 open_sop
= lock
->lk_replay_owner
;
2639 /* create lockowner and lock stateid */
2640 fp
= open_stp
->st_file
;
2641 strhashval
= lock_ownerstr_hashval(fp
->fi_inode
,
2642 open_sop
->so_client
->cl_clientid
.cl_id
,
2643 &lock
->v
.new.owner
);
2644 /* XXX: Do we need to check for duplicate stateowners on
2645 * the same file, or should they just be allowed (and
2646 * create new stateids)? */
2647 status
= nfserr_resource
;
2648 lock_sop
= alloc_init_lock_stateowner(strhashval
,
2649 open_sop
->so_client
, open_stp
, lock
);
2650 if (lock_sop
== NULL
)
2652 lock_stp
= alloc_init_lock_stateid(lock_sop
, fp
, open_stp
);
2653 if (lock_stp
== NULL
)
2656 /* lock (lock owner + lock stateid) already exists */
2657 status
= nfs4_preprocess_seqid_op(&cstate
->current_fh
,
2658 lock
->lk_old_lock_seqid
,
2659 &lock
->lk_old_lock_stateid
,
2660 CHECK_FH
| LOCK_STATE
,
2661 &lock
->lk_replay_owner
, &lock_stp
, lock
);
2664 lock_sop
= lock
->lk_replay_owner
;
2666 /* lock->lk_replay_owner and lock_stp have been created or found */
2667 filp
= lock_stp
->st_vfs_file
;
2669 status
= nfserr_grace
;
2670 if (nfs4_in_grace() && !lock
->lk_reclaim
)
2672 status
= nfserr_no_grace
;
2673 if (!nfs4_in_grace() && lock
->lk_reclaim
)
2676 locks_init_lock(&file_lock
);
2677 switch (lock
->lk_type
) {
2680 file_lock
.fl_type
= F_RDLCK
;
2684 case NFS4_WRITEW_LT
:
2685 file_lock
.fl_type
= F_WRLCK
;
2689 status
= nfserr_inval
;
2692 file_lock
.fl_owner
= (fl_owner_t
)lock_sop
;
2693 file_lock
.fl_pid
= current
->tgid
;
2694 file_lock
.fl_file
= filp
;
2695 file_lock
.fl_flags
= FL_POSIX
;
2696 file_lock
.fl_lmops
= &nfsd_posix_mng_ops
;
2698 file_lock
.fl_start
= lock
->lk_offset
;
2699 if ((lock
->lk_length
== ~(u64
)0) ||
2700 LOFF_OVERFLOW(lock
->lk_offset
, lock
->lk_length
))
2701 file_lock
.fl_end
= ~(u64
)0;
2703 file_lock
.fl_end
= lock
->lk_offset
+ lock
->lk_length
- 1;
2704 nfs4_transform_lock_offset(&file_lock
);
2707 * Try to lock the file in the VFS.
2708 * Note: locks.c uses the BKL to protect the inode's lock list.
2711 /* XXX?: Just to divert the locks_release_private at the start of
2712 * locks_copy_lock: */
2713 locks_init_lock(&conflock
);
2714 err
= vfs_lock_file(filp
, cmd
, &file_lock
, &conflock
);
2716 case 0: /* success! */
2717 update_stateid(&lock_stp
->st_stateid
);
2718 memcpy(&lock
->lk_resp_stateid
, &lock_stp
->st_stateid
,
2722 case (EAGAIN
): /* conflock holds conflicting lock */
2723 status
= nfserr_denied
;
2724 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
2725 nfs4_set_lock_denied(&conflock
, &lock
->lk_denied
);
2728 status
= nfserr_deadlock
;
2731 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err
);
2732 status
= nfserr_resource
;
2736 if (status
&& lock
->lk_is_new
&& lock_sop
)
2737 release_stateowner(lock_sop
);
2738 if (lock
->lk_replay_owner
) {
2739 nfs4_get_stateowner(lock
->lk_replay_owner
);
2740 cstate
->replay_owner
= lock
->lk_replay_owner
;
2742 nfs4_unlock_state();
2750 nfsd4_lockt(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2751 struct nfsd4_lockt
*lockt
)
2753 struct inode
*inode
;
2755 struct file_lock file_lock
;
2759 if (nfs4_in_grace())
2760 return nfserr_grace
;
2762 if (check_lock_length(lockt
->lt_offset
, lockt
->lt_length
))
2763 return nfserr_inval
;
2765 lockt
->lt_stateowner
= NULL
;
2768 status
= nfserr_stale_clientid
;
2769 if (STALE_CLIENTID(&lockt
->lt_clientid
))
2772 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0))) {
2773 dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n");
2774 if (status
== nfserr_symlink
)
2775 status
= nfserr_inval
;
2779 inode
= cstate
->current_fh
.fh_dentry
->d_inode
;
2780 locks_init_lock(&file_lock
);
2781 switch (lockt
->lt_type
) {
2784 file_lock
.fl_type
= F_RDLCK
;
2787 case NFS4_WRITEW_LT
:
2788 file_lock
.fl_type
= F_WRLCK
;
2791 dprintk("NFSD: nfs4_lockt: bad lock type!\n");
2792 status
= nfserr_inval
;
2796 lockt
->lt_stateowner
= find_lockstateowner_str(inode
,
2797 &lockt
->lt_clientid
, &lockt
->lt_owner
);
2798 if (lockt
->lt_stateowner
)
2799 file_lock
.fl_owner
= (fl_owner_t
)lockt
->lt_stateowner
;
2800 file_lock
.fl_pid
= current
->tgid
;
2801 file_lock
.fl_flags
= FL_POSIX
;
2802 file_lock
.fl_lmops
= &nfsd_posix_mng_ops
;
2804 file_lock
.fl_start
= lockt
->lt_offset
;
2805 if ((lockt
->lt_length
== ~(u64
)0) || LOFF_OVERFLOW(lockt
->lt_offset
, lockt
->lt_length
))
2806 file_lock
.fl_end
= ~(u64
)0;
2808 file_lock
.fl_end
= lockt
->lt_offset
+ lockt
->lt_length
- 1;
2810 nfs4_transform_lock_offset(&file_lock
);
2812 /* vfs_test_lock uses the struct file _only_ to resolve the inode.
2813 * since LOCKT doesn't require an OPEN, and therefore a struct
2814 * file may not exist, pass vfs_test_lock a struct file with
2815 * only the dentry:inode set.
2817 memset(&file
, 0, sizeof (struct file
));
2818 file
.f_path
.dentry
= cstate
->current_fh
.fh_dentry
;
2821 error
= vfs_test_lock(&file
, &file_lock
);
2823 status
= nfserrno(error
);
2826 if (file_lock
.fl_type
!= F_UNLCK
) {
2827 status
= nfserr_denied
;
2828 nfs4_set_lock_denied(&file_lock
, &lockt
->lt_denied
);
2831 nfs4_unlock_state();
2836 nfsd4_locku(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2837 struct nfsd4_locku
*locku
)
2839 struct nfs4_stateid
*stp
;
2840 struct file
*filp
= NULL
;
2841 struct file_lock file_lock
;
2845 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
2846 (long long) locku
->lu_offset
,
2847 (long long) locku
->lu_length
);
2849 if (check_lock_length(locku
->lu_offset
, locku
->lu_length
))
2850 return nfserr_inval
;
2854 if ((status
= nfs4_preprocess_seqid_op(&cstate
->current_fh
,
2857 CHECK_FH
| LOCK_STATE
,
2858 &locku
->lu_stateowner
, &stp
, NULL
)))
2861 filp
= stp
->st_vfs_file
;
2863 locks_init_lock(&file_lock
);
2864 file_lock
.fl_type
= F_UNLCK
;
2865 file_lock
.fl_owner
= (fl_owner_t
) locku
->lu_stateowner
;
2866 file_lock
.fl_pid
= current
->tgid
;
2867 file_lock
.fl_file
= filp
;
2868 file_lock
.fl_flags
= FL_POSIX
;
2869 file_lock
.fl_lmops
= &nfsd_posix_mng_ops
;
2870 file_lock
.fl_start
= locku
->lu_offset
;
2872 if ((locku
->lu_length
== ~(u64
)0) || LOFF_OVERFLOW(locku
->lu_offset
, locku
->lu_length
))
2873 file_lock
.fl_end
= ~(u64
)0;
2875 file_lock
.fl_end
= locku
->lu_offset
+ locku
->lu_length
- 1;
2876 nfs4_transform_lock_offset(&file_lock
);
2879 * Try to unlock the file in the VFS.
2881 err
= vfs_lock_file(filp
, F_SETLK
, &file_lock
, NULL
);
2883 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
2887 * OK, unlock succeeded; the only thing left to do is update the stateid.
2889 update_stateid(&stp
->st_stateid
);
2890 memcpy(&locku
->lu_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
2893 if (locku
->lu_stateowner
) {
2894 nfs4_get_stateowner(locku
->lu_stateowner
);
2895 cstate
->replay_owner
= locku
->lu_stateowner
;
2897 nfs4_unlock_state();
2901 status
= nfserrno(err
);
2907 * 1: locks held by lockowner
2908 * 0: no locks held by lockowner
2911 check_for_locks(struct file
*filp
, struct nfs4_stateowner
*lowner
)
2913 struct file_lock
**flpp
;
2914 struct inode
*inode
= filp
->f_path
.dentry
->d_inode
;
2918 for (flpp
= &inode
->i_flock
; *flpp
!= NULL
; flpp
= &(*flpp
)->fl_next
) {
2919 if ((*flpp
)->fl_owner
== (fl_owner_t
)lowner
) {
2930 nfsd4_release_lockowner(struct svc_rqst
*rqstp
,
2931 struct nfsd4_compound_state
*cstate
,
2932 struct nfsd4_release_lockowner
*rlockowner
)
2934 clientid_t
*clid
= &rlockowner
->rl_clientid
;
2935 struct nfs4_stateowner
*sop
;
2936 struct nfs4_stateid
*stp
;
2937 struct xdr_netobj
*owner
= &rlockowner
->rl_owner
;
2938 struct list_head matches
;
2942 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
2943 clid
->cl_boot
, clid
->cl_id
);
2945 /* XXX check for lease expiration */
2947 status
= nfserr_stale_clientid
;
2948 if (STALE_CLIENTID(clid
))
2953 status
= nfserr_locks_held
;
2954 /* XXX: we're doing a linear search through all the lockowners.
2955 * Yipes! For now we'll just hope clients aren't really using
2956 * release_lockowner much, but eventually we have to fix these
2957 * data structures. */
2958 INIT_LIST_HEAD(&matches
);
2959 for (i
= 0; i
< LOCK_HASH_SIZE
; i
++) {
2960 list_for_each_entry(sop
, &lock_ownerid_hashtbl
[i
], so_idhash
) {
2961 if (!same_owner_str(sop
, owner
, clid
))
2963 list_for_each_entry(stp
, &sop
->so_stateids
,
2965 if (check_for_locks(stp
->st_vfs_file
, sop
))
2967 /* Note: so_perclient unused for lockowners,
2968 * so it's OK to fool with here. */
2969 list_add(&sop
->so_perclient
, &matches
);
2973 /* Clients probably won't expect us to return with some (but not all)
2974 * of the lockowner state released; so don't release any until all
2975 * have been checked. */
2977 while (!list_empty(&matches
)) {
2978 sop
= list_entry(matches
.next
, struct nfs4_stateowner
,
2980 /* unhash_stateowner deletes so_perclient only
2981 * for openowners. */
2982 list_del(&sop
->so_perclient
);
2983 release_stateowner(sop
);
2986 nfs4_unlock_state();
2990 static inline struct nfs4_client_reclaim
*
2993 return kmalloc(sizeof(struct nfs4_client_reclaim
), GFP_KERNEL
);
2997 nfs4_has_reclaimed_state(const char *name
)
2999 unsigned int strhashval
= clientstr_hashval(name
);
3000 struct nfs4_client
*clp
;
3002 clp
= find_confirmed_client_by_str(name
, strhashval
);
3007 * failure => all reset bets are off, nfserr_no_grace...
3010 nfs4_client_to_reclaim(const char *name
)
3012 unsigned int strhashval
;
3013 struct nfs4_client_reclaim
*crp
= NULL
;
3015 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN
, name
);
3016 crp
= alloc_reclaim();
3019 strhashval
= clientstr_hashval(name
);
3020 INIT_LIST_HEAD(&crp
->cr_strhash
);
3021 list_add(&crp
->cr_strhash
, &reclaim_str_hashtbl
[strhashval
]);
3022 memcpy(crp
->cr_recdir
, name
, HEXDIR_LEN
);
3023 reclaim_str_hashtbl_size
++;
3028 nfs4_release_reclaim(void)
3030 struct nfs4_client_reclaim
*crp
= NULL
;
3033 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
3034 while (!list_empty(&reclaim_str_hashtbl
[i
])) {
3035 crp
= list_entry(reclaim_str_hashtbl
[i
].next
,
3036 struct nfs4_client_reclaim
, cr_strhash
);
3037 list_del(&crp
->cr_strhash
);
3039 reclaim_str_hashtbl_size
--;
3042 BUG_ON(reclaim_str_hashtbl_size
);
3046 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
3047 static struct nfs4_client_reclaim
*
3048 nfs4_find_reclaim_client(clientid_t
*clid
)
3050 unsigned int strhashval
;
3051 struct nfs4_client
*clp
;
3052 struct nfs4_client_reclaim
*crp
= NULL
;
3055 /* find clientid in conf_id_hashtbl */
3056 clp
= find_confirmed_client(clid
);
3060 dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n",
3061 clp
->cl_name
.len
, clp
->cl_name
.data
,
3064 /* find clp->cl_name in reclaim_str_hashtbl */
3065 strhashval
= clientstr_hashval(clp
->cl_recdir
);
3066 list_for_each_entry(crp
, &reclaim_str_hashtbl
[strhashval
], cr_strhash
) {
3067 if (same_name(crp
->cr_recdir
, clp
->cl_recdir
)) {
3075 * Called from OPEN. Look for clientid in reclaim list.
3078 nfs4_check_open_reclaim(clientid_t
*clid
)
3080 return nfs4_find_reclaim_client(clid
) ? nfs_ok
: nfserr_reclaim_bad
;
3083 /* initialization to perform at module load time: */
3086 nfs4_state_init(void)
3090 status
= nfsd4_init_slabs();
3093 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
3094 INIT_LIST_HEAD(&conf_id_hashtbl
[i
]);
3095 INIT_LIST_HEAD(&conf_str_hashtbl
[i
]);
3096 INIT_LIST_HEAD(&unconf_str_hashtbl
[i
]);
3097 INIT_LIST_HEAD(&unconf_id_hashtbl
[i
]);
3099 for (i
= 0; i
< FILE_HASH_SIZE
; i
++) {
3100 INIT_LIST_HEAD(&file_hashtbl
[i
]);
3102 for (i
= 0; i
< OWNER_HASH_SIZE
; i
++) {
3103 INIT_LIST_HEAD(&ownerstr_hashtbl
[i
]);
3104 INIT_LIST_HEAD(&ownerid_hashtbl
[i
]);
3106 for (i
= 0; i
< STATEID_HASH_SIZE
; i
++) {
3107 INIT_LIST_HEAD(&stateid_hashtbl
[i
]);
3108 INIT_LIST_HEAD(&lockstateid_hashtbl
[i
]);
3110 for (i
= 0; i
< LOCK_HASH_SIZE
; i
++) {
3111 INIT_LIST_HEAD(&lock_ownerid_hashtbl
[i
]);
3112 INIT_LIST_HEAD(&lock_ownerstr_hashtbl
[i
]);
3114 memset(&onestateid
, ~0, sizeof(stateid_t
));
3115 INIT_LIST_HEAD(&close_lru
);
3116 INIT_LIST_HEAD(&client_lru
);
3117 INIT_LIST_HEAD(&del_recall_lru
);
3118 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++)
3119 INIT_LIST_HEAD(&reclaim_str_hashtbl
[i
]);
3120 reclaim_str_hashtbl_size
= 0;
3125 nfsd4_load_reboot_recovery_data(void)
3130 nfsd4_init_recdir(user_recovery_dirname
);
3131 status
= nfsd4_recdir_load();
3132 nfs4_unlock_state();
3134 printk("NFSD: Failure reading reboot recovery data\n");
3138 get_nfs4_grace_period(void)
3140 return max(user_lease_time
, lease_time
) * HZ
;
3144 * Since the lifetime of a delegation isn't limited to that of an open, a
3145 * client may quite reasonably hang on to a delegation as long as it has
3146 * the inode cached. This becomes an obvious problem the first time a
3147 * client's inode cache approaches the size of the server's total memory.
3149 * For now we avoid this problem by imposing a hard limit on the number
3150 * of delegations, which varies according to the server's memory size.
3153 set_max_delegations(void)
3156 * Allow at most 4 delegations per megabyte of RAM. Quick
3157 * estimates suggest that in the worst case (where every delegation
3158 * is for a different inode), a delegation could take about 1.5K,
3159 * giving a worst case usage of about 6% of memory.
3161 max_delegations
= nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT
);
3164 /* initialization to perform when the nfsd service is started: */
3167 __nfs4_state_start(void)
3169 unsigned long grace_time
;
3171 boot_time
= get_seconds();
3172 grace_time
= get_nfs_grace_period();
3173 lease_time
= user_lease_time
;
3175 printk(KERN_INFO
"NFSD: starting %ld-second grace period\n",
3177 laundry_wq
= create_singlethread_workqueue("nfsd4");
3178 queue_delayed_work(laundry_wq
, &laundromat_work
, grace_time
);
3179 set_max_delegations();
3183 nfs4_state_start(void)
3187 nfsd4_load_reboot_recovery_data();
3188 __nfs4_state_start();
3200 nfs4_lease_time(void)
3206 __nfs4_state_shutdown(void)
3209 struct nfs4_client
*clp
= NULL
;
3210 struct nfs4_delegation
*dp
= NULL
;
3211 struct list_head
*pos
, *next
, reaplist
;
3213 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
3214 while (!list_empty(&conf_id_hashtbl
[i
])) {
3215 clp
= list_entry(conf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
3218 while (!list_empty(&unconf_str_hashtbl
[i
])) {
3219 clp
= list_entry(unconf_str_hashtbl
[i
].next
, struct nfs4_client
, cl_strhash
);
3223 INIT_LIST_HEAD(&reaplist
);
3224 spin_lock(&recall_lock
);
3225 list_for_each_safe(pos
, next
, &del_recall_lru
) {
3226 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3227 list_move(&dp
->dl_recall_lru
, &reaplist
);
3229 spin_unlock(&recall_lock
);
3230 list_for_each_safe(pos
, next
, &reaplist
) {
3231 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3232 list_del_init(&dp
->dl_recall_lru
);
3233 unhash_delegation(dp
);
3236 nfsd4_shutdown_recdir();
3241 nfs4_state_shutdown(void)
3243 cancel_rearming_delayed_workqueue(laundry_wq
, &laundromat_work
);
3244 destroy_workqueue(laundry_wq
);
3246 nfs4_release_reclaim();
3247 __nfs4_state_shutdown();
3248 nfs4_unlock_state();
3252 nfs4_set_recdir(char *recdir
)
3255 strcpy(user_recovery_dirname
, recdir
);
3256 nfs4_unlock_state();
3260 * Change the NFSv4 recovery directory to recdir.
3263 nfs4_reset_recoverydir(char *recdir
)
3266 struct nameidata nd
;
3268 status
= path_lookup(recdir
, LOOKUP_FOLLOW
, &nd
);
3272 if (S_ISDIR(nd
.dentry
->d_inode
->i_mode
)) {
3273 nfs4_set_recdir(recdir
);
3281 * Called when leasetime is changed.
3283 * The only way the protocol gives us to handle on-the-fly lease changes is to
3284 * simulate a reboot. Instead of doing that, we just wait till the next time
3285 * we start to register any changes in lease time. If the administrator
3286 * really wants to change the lease time *now*, they can go ahead and bring
3287 * nfsd down and then back up again after changing the lease time.
3290 nfs4_reset_lease(time_t leasetime
)
3293 user_lease_time
= leasetime
;