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>
52 #define NFSDDBG_FACILITY NFSDDBG_PROC
55 static time_t lease_time
= 90; /* default lease time */
56 static time_t user_lease_time
= 90;
58 static time_t grace_end
= 0;
59 static u32 current_clientid
= 1;
60 static u32 current_ownerid
= 1;
61 static u32 current_fileid
= 1;
62 static u32 current_delegid
= 1;
64 stateid_t zerostateid
; /* bits all 0 */
65 stateid_t onestateid
; /* bits all 1 */
67 /* forward declarations */
68 struct nfs4_stateid
* find_stateid(stateid_t
*stid
, int flags
);
69 static struct nfs4_delegation
* find_delegation_stateid(struct inode
*ino
, stateid_t
*stid
);
70 static void release_stateid_lockowners(struct nfs4_stateid
*open_stp
);
75 * protects clientid_hashtbl[], clientstr_hashtbl[],
76 * unconfstr_hashtbl[], uncofid_hashtbl[].
78 static DECLARE_MUTEX(client_sema
);
80 kmem_cache_t
*stateowner_slab
= NULL
;
81 kmem_cache_t
*file_slab
= NULL
;
82 kmem_cache_t
*stateid_slab
= NULL
;
83 kmem_cache_t
*deleg_slab
= NULL
;
92 nfs4_unlock_state(void)
98 opaque_hashval(const void *ptr
, int nbytes
)
100 unsigned char *cptr
= (unsigned char *) ptr
;
110 /* forward declarations */
111 static void release_stateowner(struct nfs4_stateowner
*sop
);
112 static void release_stateid(struct nfs4_stateid
*stp
, int flags
);
118 /* recall_lock protects the del_recall_lru */
119 spinlock_t recall_lock
= SPIN_LOCK_UNLOCKED
;
120 static struct list_head del_recall_lru
;
123 free_nfs4_file(struct kref
*kref
)
125 struct nfs4_file
*fp
= container_of(kref
, struct nfs4_file
, fi_ref
);
126 list_del(&fp
->fi_hash
);
128 kmem_cache_free(file_slab
, fp
);
132 put_nfs4_file(struct nfs4_file
*fi
)
134 kref_put(&fi
->fi_ref
, free_nfs4_file
);
138 get_nfs4_file(struct nfs4_file
*fi
)
140 kref_get(&fi
->fi_ref
);
143 static struct nfs4_delegation
*
144 alloc_init_deleg(struct nfs4_client
*clp
, struct nfs4_stateid
*stp
, struct svc_fh
*current_fh
, u32 type
)
146 struct nfs4_delegation
*dp
;
147 struct nfs4_file
*fp
= stp
->st_file
;
148 struct nfs4_callback
*cb
= &stp
->st_stateowner
->so_client
->cl_callback
;
150 dprintk("NFSD alloc_init_deleg\n");
151 dp
= kmem_cache_alloc(deleg_slab
, GFP_KERNEL
);
154 INIT_LIST_HEAD(&dp
->dl_del_perfile
);
155 INIT_LIST_HEAD(&dp
->dl_del_perclnt
);
156 INIT_LIST_HEAD(&dp
->dl_recall_lru
);
161 get_file(stp
->st_vfs_file
);
162 dp
->dl_vfs_file
= stp
->st_vfs_file
;
164 dp
->dl_recall
.cbr_dp
= NULL
;
165 dp
->dl_recall
.cbr_ident
= cb
->cb_ident
;
166 dp
->dl_recall
.cbr_trunc
= 0;
167 dp
->dl_stateid
.si_boot
= boot_time
;
168 dp
->dl_stateid
.si_stateownerid
= current_delegid
++;
169 dp
->dl_stateid
.si_fileid
= 0;
170 dp
->dl_stateid
.si_generation
= 0;
171 dp
->dl_fhlen
= current_fh
->fh_handle
.fh_size
;
172 memcpy(dp
->dl_fhval
, ¤t_fh
->fh_handle
.fh_base
,
173 current_fh
->fh_handle
.fh_size
);
175 atomic_set(&dp
->dl_count
, 1);
176 list_add(&dp
->dl_del_perfile
, &fp
->fi_delegations
);
177 list_add(&dp
->dl_del_perclnt
, &clp
->cl_del_perclnt
);
182 nfs4_put_delegation(struct nfs4_delegation
*dp
)
184 if (atomic_dec_and_test(&dp
->dl_count
)) {
185 dprintk("NFSD: freeing dp %p\n",dp
);
186 put_nfs4_file(dp
->dl_file
);
187 kmem_cache_free(deleg_slab
, dp
);
191 /* Remove the associated file_lock first, then remove the delegation.
192 * lease_modify() is called to remove the FS_LEASE file_lock from
193 * the i_flock list, eventually calling nfsd's lock_manager
194 * fl_release_callback.
197 nfs4_close_delegation(struct nfs4_delegation
*dp
)
199 struct file
*filp
= dp
->dl_vfs_file
;
201 dprintk("NFSD: close_delegation dp %p\n",dp
);
202 dp
->dl_vfs_file
= NULL
;
203 /* The following nfsd_close may not actually close the file,
204 * but we want to remove the lease in any case. */
206 setlease(filp
, F_UNLCK
, &dp
->dl_flock
);
210 /* Called under the state lock. */
212 unhash_delegation(struct nfs4_delegation
*dp
)
214 list_del_init(&dp
->dl_del_perfile
);
215 list_del_init(&dp
->dl_del_perclnt
);
216 spin_lock(&recall_lock
);
217 list_del_init(&dp
->dl_recall_lru
);
218 spin_unlock(&recall_lock
);
219 nfs4_close_delegation(dp
);
220 nfs4_put_delegation(dp
);
227 /* Hash tables for nfs4_clientid state */
228 #define CLIENT_HASH_BITS 4
229 #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS)
230 #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1)
232 #define clientid_hashval(id) \
233 ((id) & CLIENT_HASH_MASK)
234 #define clientstr_hashval(name, namelen) \
235 (opaque_hashval((name), (namelen)) & CLIENT_HASH_MASK)
237 * reclaim_str_hashtbl[] holds known client info from previous reset/reboot
238 * used in reboot/reset lease grace period processing
240 * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed
241 * setclientid_confirmed info.
243 * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed
246 * client_lru holds client queue ordered by nfs4_client.cl_time
249 * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time
250 * for last close replay.
252 static struct list_head reclaim_str_hashtbl
[CLIENT_HASH_SIZE
];
253 static int reclaim_str_hashtbl_size
= 0;
254 static struct list_head conf_id_hashtbl
[CLIENT_HASH_SIZE
];
255 static struct list_head conf_str_hashtbl
[CLIENT_HASH_SIZE
];
256 static struct list_head unconf_str_hashtbl
[CLIENT_HASH_SIZE
];
257 static struct list_head unconf_id_hashtbl
[CLIENT_HASH_SIZE
];
258 static struct list_head client_lru
;
259 static struct list_head close_lru
;
262 renew_client(struct nfs4_client
*clp
)
265 * Move client to the end to the LRU list.
267 dprintk("renewing client (clientid %08x/%08x)\n",
268 clp
->cl_clientid
.cl_boot
,
269 clp
->cl_clientid
.cl_id
);
270 list_move_tail(&clp
->cl_lru
, &client_lru
);
271 clp
->cl_time
= get_seconds();
274 /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
276 STALE_CLIENTID(clientid_t
*clid
)
278 if (clid
->cl_boot
== boot_time
)
280 dprintk("NFSD stale clientid (%08x/%08x)\n",
281 clid
->cl_boot
, clid
->cl_id
);
286 * XXX Should we use a slab cache ?
287 * This type of memory management is somewhat inefficient, but we use it
288 * anyway since SETCLIENTID is not a common operation.
290 static inline struct nfs4_client
*
291 alloc_client(struct xdr_netobj name
)
293 struct nfs4_client
*clp
;
295 if ((clp
= kmalloc(sizeof(struct nfs4_client
), GFP_KERNEL
))!= NULL
) {
296 memset(clp
, 0, sizeof(*clp
));
297 if ((clp
->cl_name
.data
= kmalloc(name
.len
, GFP_KERNEL
)) != NULL
) {
298 memcpy(clp
->cl_name
.data
, name
.data
, name
.len
);
299 clp
->cl_name
.len
= name
.len
;
310 free_client(struct nfs4_client
*clp
)
312 if (clp
->cl_cred
.cr_group_info
)
313 put_group_info(clp
->cl_cred
.cr_group_info
);
314 kfree(clp
->cl_name
.data
);
319 put_nfs4_client(struct nfs4_client
*clp
)
321 if (atomic_dec_and_test(&clp
->cl_count
))
326 expire_client(struct nfs4_client
*clp
)
328 struct nfs4_stateowner
*sop
;
329 struct nfs4_delegation
*dp
;
330 struct nfs4_callback
*cb
= &clp
->cl_callback
;
331 struct rpc_clnt
*clnt
= clp
->cl_callback
.cb_client
;
332 struct list_head reaplist
;
334 dprintk("NFSD: expire_client cl_count %d\n",
335 atomic_read(&clp
->cl_count
));
337 /* shutdown rpc client, ending any outstanding recall rpcs */
338 if (atomic_read(&cb
->cb_set
) == 1 && clnt
) {
339 rpc_shutdown_client(clnt
);
340 clnt
= clp
->cl_callback
.cb_client
= NULL
;
343 INIT_LIST_HEAD(&reaplist
);
344 spin_lock(&recall_lock
);
345 while (!list_empty(&clp
->cl_del_perclnt
)) {
346 dp
= list_entry(clp
->cl_del_perclnt
.next
, struct nfs4_delegation
, dl_del_perclnt
);
347 dprintk("NFSD: expire client. dp %p, fp %p\n", dp
,
349 list_del_init(&dp
->dl_del_perclnt
);
350 list_move(&dp
->dl_recall_lru
, &reaplist
);
352 spin_unlock(&recall_lock
);
353 while (!list_empty(&reaplist
)) {
354 dp
= list_entry(reaplist
.next
, struct nfs4_delegation
, dl_recall_lru
);
355 list_del_init(&dp
->dl_recall_lru
);
356 unhash_delegation(dp
);
358 list_del(&clp
->cl_idhash
);
359 list_del(&clp
->cl_strhash
);
360 list_del(&clp
->cl_lru
);
361 while (!list_empty(&clp
->cl_perclient
)) {
362 sop
= list_entry(clp
->cl_perclient
.next
, struct nfs4_stateowner
, so_perclient
);
363 release_stateowner(sop
);
365 put_nfs4_client(clp
);
368 static struct nfs4_client
*
369 create_client(struct xdr_netobj name
) {
370 struct nfs4_client
*clp
;
372 if (!(clp
= alloc_client(name
)))
374 atomic_set(&clp
->cl_count
, 1);
375 atomic_set(&clp
->cl_callback
.cb_set
, 0);
376 clp
->cl_callback
.cb_parsed
= 0;
377 INIT_LIST_HEAD(&clp
->cl_idhash
);
378 INIT_LIST_HEAD(&clp
->cl_strhash
);
379 INIT_LIST_HEAD(&clp
->cl_perclient
);
380 INIT_LIST_HEAD(&clp
->cl_del_perclnt
);
381 INIT_LIST_HEAD(&clp
->cl_lru
);
387 copy_verf(struct nfs4_client
*target
, nfs4_verifier
*source
) {
388 memcpy(target
->cl_verifier
.data
, source
->data
, sizeof(target
->cl_verifier
.data
));
392 copy_clid(struct nfs4_client
*target
, struct nfs4_client
*source
) {
393 target
->cl_clientid
.cl_boot
= source
->cl_clientid
.cl_boot
;
394 target
->cl_clientid
.cl_id
= source
->cl_clientid
.cl_id
;
398 copy_cred(struct svc_cred
*target
, struct svc_cred
*source
) {
400 target
->cr_uid
= source
->cr_uid
;
401 target
->cr_gid
= source
->cr_gid
;
402 target
->cr_group_info
= source
->cr_group_info
;
403 get_group_info(target
->cr_group_info
);
407 cmp_name(struct xdr_netobj
*n1
, struct xdr_netobj
*n2
) {
410 return((n1
->len
== n2
->len
) && !memcmp(n1
->data
, n2
->data
, n2
->len
));
414 cmp_verf(nfs4_verifier
*v1
, nfs4_verifier
*v2
) {
415 return(!memcmp(v1
->data
,v2
->data
,sizeof(v1
->data
)));
419 cmp_clid(clientid_t
* cl1
, clientid_t
* cl2
) {
420 return((cl1
->cl_boot
== cl2
->cl_boot
) &&
421 (cl1
->cl_id
== cl2
->cl_id
));
424 /* XXX what about NGROUP */
426 cmp_creds(struct svc_cred
*cr1
, struct svc_cred
*cr2
){
427 return(cr1
->cr_uid
== cr2
->cr_uid
);
432 gen_clid(struct nfs4_client
*clp
) {
433 clp
->cl_clientid
.cl_boot
= boot_time
;
434 clp
->cl_clientid
.cl_id
= current_clientid
++;
438 gen_confirm(struct nfs4_client
*clp
) {
443 p
= (u32
*)clp
->cl_confirm
.data
;
449 check_name(struct xdr_netobj name
) {
453 if (name
.len
> NFS4_OPAQUE_LIMIT
) {
454 printk("NFSD: check_name: name too long(%d)!\n", name
.len
);
461 add_to_unconfirmed(struct nfs4_client
*clp
, unsigned int strhashval
)
463 unsigned int idhashval
;
465 list_add(&clp
->cl_strhash
, &unconf_str_hashtbl
[strhashval
]);
466 idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
467 list_add(&clp
->cl_idhash
, &unconf_id_hashtbl
[idhashval
]);
468 list_add_tail(&clp
->cl_lru
, &client_lru
);
469 clp
->cl_time
= get_seconds();
473 move_to_confirmed(struct nfs4_client
*clp
)
475 unsigned int idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
476 unsigned int strhashval
;
478 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp
);
479 list_del_init(&clp
->cl_strhash
);
480 list_del_init(&clp
->cl_idhash
);
481 list_add(&clp
->cl_idhash
, &conf_id_hashtbl
[idhashval
]);
482 strhashval
= clientstr_hashval(clp
->cl_name
.data
,
484 list_add(&clp
->cl_strhash
, &conf_str_hashtbl
[strhashval
]);
488 static struct nfs4_client
*
489 find_confirmed_client(clientid_t
*clid
)
491 struct nfs4_client
*clp
;
492 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
494 list_for_each_entry(clp
, &conf_id_hashtbl
[idhashval
], cl_idhash
) {
495 if (cmp_clid(&clp
->cl_clientid
, clid
))
501 static struct nfs4_client
*
502 find_unconfirmed_client(clientid_t
*clid
)
504 struct nfs4_client
*clp
;
505 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
507 list_for_each_entry(clp
, &unconf_id_hashtbl
[idhashval
], cl_idhash
) {
508 if (cmp_clid(&clp
->cl_clientid
, clid
))
514 /* a helper function for parse_callback */
516 parse_octet(unsigned int *lenp
, char **addrp
)
518 unsigned int len
= *lenp
;
530 if ((c
< '0') || (c
> '9')) {
536 n
= (n
* 10) + (c
- '0');
547 /* parse and set the setclientid ipv4 callback address */
549 parse_ipv4(unsigned int addr_len
, char *addr_val
, unsigned int *cbaddrp
, unsigned short *cbportp
)
554 u32 addrlen
= addr_len
;
555 char *addr
= addr_val
;
560 for(i
= 4; i
> 0 ; i
--) {
561 if ((temp
= parse_octet(&addrlen
, &addr
)) < 0) {
564 cbaddr
|= (temp
<< shift
);
572 for(i
= 2; i
> 0 ; i
--) {
573 if ((temp
= parse_octet(&addrlen
, &addr
)) < 0) {
576 cbport
|= (temp
<< shift
);
585 gen_callback(struct nfs4_client
*clp
, struct nfsd4_setclientid
*se
)
587 struct nfs4_callback
*cb
= &clp
->cl_callback
;
589 /* Currently, we only support tcp for the callback channel */
590 if ((se
->se_callback_netid_len
!= 3) || memcmp((char *)se
->se_callback_netid_val
, "tcp", 3))
593 if ( !(parse_ipv4(se
->se_callback_addr_len
, se
->se_callback_addr_val
,
594 &cb
->cb_addr
, &cb
->cb_port
)))
596 cb
->cb_prog
= se
->se_callback_prog
;
597 cb
->cb_ident
= se
->se_callback_ident
;
601 printk(KERN_INFO
"NFSD: this client (clientid %08x/%08x) "
602 "will not receive delegations\n",
603 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
610 * RFC 3010 has a complex implmentation description of processing a
611 * SETCLIENTID request consisting of 5 bullets, labeled as
612 * CASE0 - CASE4 below.
615 * callback information will be processed in a future patch
617 * an unconfirmed record is added when:
618 * NORMAL (part of CASE 4): there is no confirmed nor unconfirmed record.
619 * CASE 1: confirmed record found with matching name, principal,
620 * verifier, and clientid.
621 * CASE 2: confirmed record found with matching name, principal,
622 * and there is no unconfirmed record with matching
625 * an unconfirmed record is replaced when:
626 * CASE 3: confirmed record found with matching name, principal,
627 * and an unconfirmed record is found with matching
628 * name, principal, and with clientid and
629 * confirm that does not match the confirmed record.
630 * CASE 4: there is no confirmed record with matching name and
631 * principal. there is an unconfirmed record with
632 * matching name, principal.
634 * an unconfirmed record is deleted when:
635 * CASE 1: an unconfirmed record that matches input name, verifier,
636 * and confirmed clientid.
637 * CASE 4: any unconfirmed records with matching name and principal
638 * that exist after an unconfirmed record has been replaced
639 * as described above.
643 nfsd4_setclientid(struct svc_rqst
*rqstp
, struct nfsd4_setclientid
*setclid
)
645 u32 ip_addr
= rqstp
->rq_addr
.sin_addr
.s_addr
;
646 struct xdr_netobj clname
= {
647 .len
= setclid
->se_namelen
,
648 .data
= setclid
->se_name
,
650 nfs4_verifier clverifier
= setclid
->se_verf
;
651 unsigned int strhashval
;
652 struct nfs4_client
* conf
, * unconf
, * new, * clp
;
655 status
= nfserr_inval
;
656 if (!check_name(clname
))
660 * XXX The Duplicate Request Cache (DRC) has been checked (??)
661 * We get here on a DRC miss.
664 strhashval
= clientstr_hashval(clname
.data
, clname
.len
);
668 list_for_each_entry(clp
, &conf_str_hashtbl
[strhashval
], cl_strhash
) {
669 if (!cmp_name(&clp
->cl_name
, &clname
))
673 * clname match, confirmed, different principal
674 * or different ip_address
676 status
= nfserr_clid_inuse
;
677 if (!cmp_creds(&clp
->cl_cred
,&rqstp
->rq_cred
)) {
678 printk("NFSD: setclientid: string in use by client"
679 "(clientid %08x/%08x)\n",
680 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
683 if (clp
->cl_addr
!= ip_addr
) {
684 printk("NFSD: setclientid: string in use by client"
685 "(clientid %08x/%08x)\n",
686 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
691 * cl_name match from a previous SETCLIENTID operation
692 * XXX check for additional matches?
698 list_for_each_entry(clp
, &unconf_str_hashtbl
[strhashval
], cl_strhash
) {
699 if (!cmp_name(&clp
->cl_name
, &clname
))
701 /* cl_name match from a previous SETCLIENTID operation */
705 status
= nfserr_resource
;
709 * placed first, because it is the normal case.
712 expire_client(unconf
);
713 if (!(new = create_client(clname
)))
715 copy_verf(new, &clverifier
);
716 new->cl_addr
= ip_addr
;
717 copy_cred(&new->cl_cred
,&rqstp
->rq_cred
);
720 gen_callback(new, setclid
);
721 add_to_unconfirmed(new, strhashval
);
722 } else if (cmp_verf(&conf
->cl_verifier
, &clverifier
)) {
725 * cl_name match, confirmed, principal match
726 * verifier match: probable callback update
728 * remove any unconfirmed nfs4_client with
729 * matching cl_name, cl_verifier, and cl_clientid
731 * create and insert an unconfirmed nfs4_client with same
732 * cl_name, cl_verifier, and cl_clientid as existing
733 * nfs4_client, but with the new callback info and a
737 cmp_verf(&unconf
->cl_verifier
, &conf
->cl_verifier
) &&
738 cmp_clid(&unconf
->cl_clientid
, &conf
->cl_clientid
)) {
739 expire_client(unconf
);
741 if (!(new = create_client(clname
)))
743 copy_verf(new,&conf
->cl_verifier
);
744 new->cl_addr
= ip_addr
;
745 copy_cred(&new->cl_cred
,&rqstp
->rq_cred
);
746 copy_clid(new, conf
);
748 gen_callback(new, setclid
);
749 add_to_unconfirmed(new,strhashval
);
750 } else if (!unconf
) {
753 * clname match, confirmed, principal match
754 * verfier does not match
755 * no unconfirmed. create a new unconfirmed nfs4_client
756 * using input clverifier, clname, and callback info
757 * and generate a new cl_clientid and cl_confirm.
759 if (!(new = create_client(clname
)))
761 copy_verf(new,&clverifier
);
762 new->cl_addr
= ip_addr
;
763 copy_cred(&new->cl_cred
,&rqstp
->rq_cred
);
766 gen_callback(new, setclid
);
767 add_to_unconfirmed(new, strhashval
);
768 } else if (!cmp_verf(&conf
->cl_confirm
, &unconf
->cl_confirm
)) {
771 * confirmed found (name, principal match)
772 * confirmed verifier does not match input clverifier
774 * unconfirmed found (name match)
775 * confirmed->cl_confirm != unconfirmed->cl_confirm
777 * remove unconfirmed.
779 * create an unconfirmed nfs4_client
780 * with same cl_name as existing confirmed nfs4_client,
781 * but with new callback info, new cl_clientid,
782 * new cl_verifier and a new cl_confirm
784 expire_client(unconf
);
785 if (!(new = create_client(clname
)))
787 copy_verf(new,&clverifier
);
788 new->cl_addr
= ip_addr
;
789 copy_cred(&new->cl_cred
,&rqstp
->rq_cred
);
792 gen_callback(new, setclid
);
793 add_to_unconfirmed(new, strhashval
);
795 /* No cases hit !!! */
796 status
= nfserr_inval
;
800 setclid
->se_clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
801 setclid
->se_clientid
.cl_id
= new->cl_clientid
.cl_id
;
802 memcpy(setclid
->se_confirm
.data
, new->cl_confirm
.data
, sizeof(setclid
->se_confirm
.data
));
811 * RFC 3010 has a complex implmentation description of processing a
812 * SETCLIENTID_CONFIRM request consisting of 4 bullets describing
813 * processing on a DRC miss, labeled as CASE1 - CASE4 below.
815 * NOTE: callback information will be processed here in a future patch
818 nfsd4_setclientid_confirm(struct svc_rqst
*rqstp
, struct nfsd4_setclientid_confirm
*setclientid_confirm
)
820 u32 ip_addr
= rqstp
->rq_addr
.sin_addr
.s_addr
;
821 struct nfs4_client
*clp
, *conf
= NULL
, *unconf
= NULL
;
822 nfs4_verifier confirm
= setclientid_confirm
->sc_confirm
;
823 clientid_t
* clid
= &setclientid_confirm
->sc_clientid
;
826 if (STALE_CLIENTID(clid
))
827 return nfserr_stale_clientid
;
829 * XXX The Duplicate Request Cache (DRC) has been checked (??)
830 * We get here on a DRC miss.
834 clp
= find_confirmed_client(clid
);
836 status
= nfserr_inval
;
838 * Found a record for this clientid. If the IP addresses
839 * don't match, return ERR_INVAL just as if the record had
842 if (clp
->cl_addr
!= ip_addr
) {
843 printk("NFSD: setclientid: string in use by client"
844 "(clientid %08x/%08x)\n",
845 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
850 clp
= find_unconfirmed_client(clid
);
852 status
= nfserr_inval
;
853 if (clp
->cl_addr
!= ip_addr
) {
854 printk("NFSD: setclientid: string in use by client"
855 "(clientid %08x/%08x)\n",
856 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
862 * unconf record that matches input clientid and input confirm.
863 * conf record that matches input clientid.
864 * conf and unconf records match names, verifiers
866 if ((conf
&& unconf
) &&
867 (cmp_verf(&unconf
->cl_confirm
, &confirm
)) &&
868 (cmp_verf(&conf
->cl_verifier
, &unconf
->cl_verifier
)) &&
869 (cmp_name(&conf
->cl_name
,&unconf
->cl_name
)) &&
870 (!cmp_verf(&conf
->cl_confirm
, &unconf
->cl_confirm
))) {
871 if (!cmp_creds(&conf
->cl_cred
, &unconf
->cl_cred
))
872 status
= nfserr_clid_inuse
;
876 move_to_confirmed(unconf
);
882 * conf record that matches input clientid.
883 * if unconf record that matches input clientid, then unconf->cl_name
884 * or unconf->cl_verifier don't match the conf record.
886 if ((conf
&& !unconf
) ||
888 (!cmp_verf(&conf
->cl_verifier
, &unconf
->cl_verifier
) ||
889 !cmp_name(&conf
->cl_name
, &unconf
->cl_name
)))) {
890 if (!cmp_creds(&conf
->cl_cred
,&rqstp
->rq_cred
)) {
891 status
= nfserr_clid_inuse
;
899 * conf record not found.
900 * unconf record found.
901 * unconf->cl_confirm matches input confirm
903 if (!conf
&& unconf
&& cmp_verf(&unconf
->cl_confirm
, &confirm
)) {
904 if (!cmp_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
)) {
905 status
= nfserr_clid_inuse
;
909 move_to_confirmed(unconf
);
914 * conf record not found, or if conf, then conf->cl_confirm does not
915 * match input confirm.
916 * unconf record not found, or if unconf, then unconf->cl_confirm
917 * does not match input confirm.
919 if ((!conf
|| (conf
&& !cmp_verf(&conf
->cl_confirm
, &confirm
))) &&
920 (!unconf
|| (unconf
&& !cmp_verf(&unconf
->cl_confirm
, &confirm
)))) {
921 status
= nfserr_stale_clientid
;
924 /* check that we have hit one of the cases...*/
925 status
= nfserr_inval
;
929 nfsd4_probe_callback(clp
);
935 * Open owner state (share locks)
938 /* hash tables for nfs4_stateowner */
939 #define OWNER_HASH_BITS 8
940 #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
941 #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
943 #define ownerid_hashval(id) \
944 ((id) & OWNER_HASH_MASK)
945 #define ownerstr_hashval(clientid, ownername) \
946 (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK)
948 static struct list_head ownerid_hashtbl
[OWNER_HASH_SIZE
];
949 static struct list_head ownerstr_hashtbl
[OWNER_HASH_SIZE
];
951 /* hash table for nfs4_file */
952 #define FILE_HASH_BITS 8
953 #define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
954 #define FILE_HASH_MASK (FILE_HASH_SIZE - 1)
955 /* hash table for (open)nfs4_stateid */
956 #define STATEID_HASH_BITS 10
957 #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS)
958 #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1)
960 #define file_hashval(x) \
961 hash_ptr(x, FILE_HASH_BITS)
962 #define stateid_hashval(owner_id, file_id) \
963 (((owner_id) + (file_id)) & STATEID_HASH_MASK)
965 static struct list_head file_hashtbl
[FILE_HASH_SIZE
];
966 static struct list_head stateid_hashtbl
[STATEID_HASH_SIZE
];
968 /* OPEN Share state helper functions */
969 static inline struct nfs4_file
*
970 alloc_init_file(struct inode
*ino
)
972 struct nfs4_file
*fp
;
973 unsigned int hashval
= file_hashval(ino
);
975 fp
= kmem_cache_alloc(file_slab
, GFP_KERNEL
);
977 kref_init(&fp
->fi_ref
);
978 INIT_LIST_HEAD(&fp
->fi_hash
);
979 INIT_LIST_HEAD(&fp
->fi_stateids
);
980 INIT_LIST_HEAD(&fp
->fi_delegations
);
981 list_add(&fp
->fi_hash
, &file_hashtbl
[hashval
]);
982 fp
->fi_inode
= igrab(ino
);
983 fp
->fi_id
= current_fileid
++;
990 nfsd4_free_slab(kmem_cache_t
**slab
)
996 status
= kmem_cache_destroy(*slab
);
1002 nfsd4_free_slabs(void)
1004 nfsd4_free_slab(&stateowner_slab
);
1005 nfsd4_free_slab(&file_slab
);
1006 nfsd4_free_slab(&stateid_slab
);
1007 nfsd4_free_slab(&deleg_slab
);
1011 nfsd4_init_slabs(void)
1013 stateowner_slab
= kmem_cache_create("nfsd4_stateowners",
1014 sizeof(struct nfs4_stateowner
), 0, 0, NULL
, NULL
);
1015 if (stateowner_slab
== NULL
)
1017 file_slab
= kmem_cache_create("nfsd4_files",
1018 sizeof(struct nfs4_file
), 0, 0, NULL
, NULL
);
1019 if (file_slab
== NULL
)
1021 stateid_slab
= kmem_cache_create("nfsd4_stateids",
1022 sizeof(struct nfs4_stateid
), 0, 0, NULL
, NULL
);
1023 if (stateid_slab
== NULL
)
1025 deleg_slab
= kmem_cache_create("nfsd4_delegations",
1026 sizeof(struct nfs4_delegation
), 0, 0, NULL
, NULL
);
1027 if (deleg_slab
== NULL
)
1032 dprintk("nfsd4: out of memory while initializing nfsv4\n");
1037 nfs4_free_stateowner(struct kref
*kref
)
1039 struct nfs4_stateowner
*sop
=
1040 container_of(kref
, struct nfs4_stateowner
, so_ref
);
1041 kfree(sop
->so_owner
.data
);
1042 kmem_cache_free(stateowner_slab
, sop
);
1045 static inline struct nfs4_stateowner
*
1046 alloc_stateowner(struct xdr_netobj
*owner
)
1048 struct nfs4_stateowner
*sop
;
1050 if ((sop
= kmem_cache_alloc(stateowner_slab
, GFP_KERNEL
))) {
1051 if ((sop
->so_owner
.data
= kmalloc(owner
->len
, GFP_KERNEL
))) {
1052 memcpy(sop
->so_owner
.data
, owner
->data
, owner
->len
);
1053 sop
->so_owner
.len
= owner
->len
;
1054 kref_init(&sop
->so_ref
);
1057 kmem_cache_free(stateowner_slab
, sop
);
1062 static struct nfs4_stateowner
*
1063 alloc_init_open_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfsd4_open
*open
) {
1064 struct nfs4_stateowner
*sop
;
1065 struct nfs4_replay
*rp
;
1066 unsigned int idhashval
;
1068 if (!(sop
= alloc_stateowner(&open
->op_owner
)))
1070 idhashval
= ownerid_hashval(current_ownerid
);
1071 INIT_LIST_HEAD(&sop
->so_idhash
);
1072 INIT_LIST_HEAD(&sop
->so_strhash
);
1073 INIT_LIST_HEAD(&sop
->so_perclient
);
1074 INIT_LIST_HEAD(&sop
->so_perfilestate
);
1075 INIT_LIST_HEAD(&sop
->so_perlockowner
); /* not used */
1076 INIT_LIST_HEAD(&sop
->so_close_lru
);
1078 list_add(&sop
->so_idhash
, &ownerid_hashtbl
[idhashval
]);
1079 list_add(&sop
->so_strhash
, &ownerstr_hashtbl
[strhashval
]);
1080 list_add(&sop
->so_perclient
, &clp
->cl_perclient
);
1081 sop
->so_is_open_owner
= 1;
1082 sop
->so_id
= current_ownerid
++;
1083 sop
->so_client
= clp
;
1084 sop
->so_seqid
= open
->op_seqid
;
1085 sop
->so_confirmed
= 0;
1086 rp
= &sop
->so_replay
;
1087 rp
->rp_status
= NFSERR_SERVERFAULT
;
1089 rp
->rp_buf
= rp
->rp_ibuf
;
1094 release_stateid_lockowners(struct nfs4_stateid
*open_stp
)
1096 struct nfs4_stateowner
*lock_sop
;
1098 while (!list_empty(&open_stp
->st_perlockowner
)) {
1099 lock_sop
= list_entry(open_stp
->st_perlockowner
.next
,
1100 struct nfs4_stateowner
, so_perlockowner
);
1101 /* list_del(&open_stp->st_perlockowner); */
1102 BUG_ON(lock_sop
->so_is_open_owner
);
1103 release_stateowner(lock_sop
);
1108 unhash_stateowner(struct nfs4_stateowner
*sop
)
1110 struct nfs4_stateid
*stp
;
1112 list_del(&sop
->so_idhash
);
1113 list_del(&sop
->so_strhash
);
1114 if (sop
->so_is_open_owner
)
1115 list_del(&sop
->so_perclient
);
1116 list_del(&sop
->so_perlockowner
);
1117 while (!list_empty(&sop
->so_perfilestate
)) {
1118 stp
= list_entry(sop
->so_perfilestate
.next
,
1119 struct nfs4_stateid
, st_perfilestate
);
1120 if (sop
->so_is_open_owner
)
1121 release_stateid(stp
, OPEN_STATE
);
1123 release_stateid(stp
, LOCK_STATE
);
1128 release_stateowner(struct nfs4_stateowner
*sop
)
1130 unhash_stateowner(sop
);
1131 list_del(&sop
->so_close_lru
);
1132 nfs4_put_stateowner(sop
);
1136 init_stateid(struct nfs4_stateid
*stp
, struct nfs4_file
*fp
, struct nfsd4_open
*open
) {
1137 struct nfs4_stateowner
*sop
= open
->op_stateowner
;
1138 unsigned int hashval
= stateid_hashval(sop
->so_id
, fp
->fi_id
);
1140 INIT_LIST_HEAD(&stp
->st_hash
);
1141 INIT_LIST_HEAD(&stp
->st_perfilestate
);
1142 INIT_LIST_HEAD(&stp
->st_perlockowner
);
1143 INIT_LIST_HEAD(&stp
->st_perfile
);
1144 list_add(&stp
->st_hash
, &stateid_hashtbl
[hashval
]);
1145 list_add(&stp
->st_perfilestate
, &sop
->so_perfilestate
);
1146 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
1147 stp
->st_stateowner
= sop
;
1150 stp
->st_stateid
.si_boot
= boot_time
;
1151 stp
->st_stateid
.si_stateownerid
= sop
->so_id
;
1152 stp
->st_stateid
.si_fileid
= fp
->fi_id
;
1153 stp
->st_stateid
.si_generation
= 0;
1154 stp
->st_access_bmap
= 0;
1155 stp
->st_deny_bmap
= 0;
1156 __set_bit(open
->op_share_access
, &stp
->st_access_bmap
);
1157 __set_bit(open
->op_share_deny
, &stp
->st_deny_bmap
);
1161 release_stateid(struct nfs4_stateid
*stp
, int flags
)
1163 struct file
*filp
= stp
->st_vfs_file
;
1165 list_del(&stp
->st_hash
);
1166 list_del(&stp
->st_perfile
);
1167 list_del(&stp
->st_perfilestate
);
1168 if (flags
& OPEN_STATE
) {
1169 release_stateid_lockowners(stp
);
1170 stp
->st_vfs_file
= NULL
;
1172 } else if (flags
& LOCK_STATE
)
1173 locks_remove_posix(filp
, (fl_owner_t
) stp
->st_stateowner
);
1174 put_nfs4_file(stp
->st_file
);
1175 kmem_cache_free(stateid_slab
, stp
);
1180 move_to_close_lru(struct nfs4_stateowner
*sop
)
1182 dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop
);
1184 unhash_stateowner(sop
);
1185 list_add_tail(&sop
->so_close_lru
, &close_lru
);
1186 sop
->so_time
= get_seconds();
1190 release_state_owner(struct nfs4_stateid
*stp
, int flag
)
1192 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
1194 dprintk("NFSD: release_state_owner\n");
1195 release_stateid(stp
, flag
);
1197 /* place unused nfs4_stateowners on so_close_lru list to be
1198 * released by the laundromat service after the lease period
1199 * to enable us to handle CLOSE replay
1201 if (sop
->so_confirmed
&& list_empty(&sop
->so_perfilestate
))
1202 move_to_close_lru(sop
);
1206 cmp_owner_str(struct nfs4_stateowner
*sop
, struct xdr_netobj
*owner
, clientid_t
*clid
) {
1207 return ((sop
->so_owner
.len
== owner
->len
) &&
1208 !memcmp(sop
->so_owner
.data
, owner
->data
, owner
->len
) &&
1209 (sop
->so_client
->cl_clientid
.cl_id
== clid
->cl_id
));
1212 static struct nfs4_stateowner
*
1213 find_openstateowner_str(unsigned int hashval
, struct nfsd4_open
*open
)
1215 struct nfs4_stateowner
*so
= NULL
;
1217 list_for_each_entry(so
, &ownerstr_hashtbl
[hashval
], so_strhash
) {
1218 if (cmp_owner_str(so
, &open
->op_owner
, &open
->op_clientid
))
1224 /* search file_hashtbl[] for file */
1225 static struct nfs4_file
*
1226 find_file(struct inode
*ino
)
1228 unsigned int hashval
= file_hashval(ino
);
1229 struct nfs4_file
*fp
;
1231 list_for_each_entry(fp
, &file_hashtbl
[hashval
], fi_hash
) {
1232 if (fp
->fi_inode
== ino
) {
1240 #define TEST_ACCESS(x) ((x > 0 || x < 4)?1:0)
1241 #define TEST_DENY(x) ((x >= 0 || x < 5)?1:0)
1244 set_access(unsigned int *access
, unsigned long bmap
) {
1248 for (i
= 1; i
< 4; i
++) {
1249 if (test_bit(i
, &bmap
))
1255 set_deny(unsigned int *deny
, unsigned long bmap
) {
1259 for (i
= 0; i
< 4; i
++) {
1260 if (test_bit(i
, &bmap
))
1266 test_share(struct nfs4_stateid
*stp
, struct nfsd4_open
*open
) {
1267 unsigned int access
, deny
;
1269 set_access(&access
, stp
->st_access_bmap
);
1270 set_deny(&deny
, stp
->st_deny_bmap
);
1271 if ((access
& open
->op_share_deny
) || (deny
& open
->op_share_access
))
1277 * Called to check deny when READ with all zero stateid or
1278 * WRITE with all zero or all one stateid
1281 nfs4_share_conflict(struct svc_fh
*current_fh
, unsigned int deny_type
)
1283 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
1284 struct nfs4_file
*fp
;
1285 struct nfs4_stateid
*stp
;
1288 dprintk("NFSD: nfs4_share_conflict\n");
1290 fp
= find_file(ino
);
1293 ret
= nfserr_share_denied
;
1294 /* Search for conflicting share reservations */
1295 list_for_each_entry(stp
, &fp
->fi_stateids
, st_perfile
) {
1296 if (test_bit(deny_type
, &stp
->st_deny_bmap
) ||
1297 test_bit(NFS4_SHARE_DENY_BOTH
, &stp
->st_deny_bmap
))
1307 nfs4_file_downgrade(struct file
*filp
, unsigned int share_access
)
1309 if (share_access
& NFS4_SHARE_ACCESS_WRITE
) {
1310 put_write_access(filp
->f_dentry
->d_inode
);
1311 filp
->f_mode
= (filp
->f_mode
| FMODE_READ
) & ~FMODE_WRITE
;
1316 * Recall a delegation
1319 do_recall(void *__dp
)
1321 struct nfs4_delegation
*dp
= __dp
;
1323 daemonize("nfsv4-recall");
1325 nfsd4_cb_recall(dp
);
1330 * Spawn a thread to perform a recall on the delegation represented
1331 * by the lease (file_lock)
1333 * Called from break_lease() with lock_kernel() held.
1334 * Note: we assume break_lease will only call this *once* for any given
1338 void nfsd_break_deleg_cb(struct file_lock
*fl
)
1340 struct nfs4_delegation
*dp
= (struct nfs4_delegation
*)fl
->fl_owner
;
1341 struct task_struct
*t
;
1343 dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp
,fl
);
1347 /* We're assuming the state code never drops its reference
1348 * without first removing the lease. Since we're in this lease
1349 * callback (and since the lease code is serialized by the kernel
1350 * lock) we know the server hasn't removed the lease yet, we know
1351 * it's safe to take a reference: */
1352 atomic_inc(&dp
->dl_count
);
1354 spin_lock(&recall_lock
);
1355 list_add_tail(&dp
->dl_recall_lru
, &del_recall_lru
);
1356 spin_unlock(&recall_lock
);
1358 /* only place dl_time is set. protected by lock_kernel*/
1359 dp
->dl_time
= get_seconds();
1361 /* XXX need to merge NFSD_LEASE_TIME with fs/locks.c:lease_break_time */
1362 fl
->fl_break_time
= jiffies
+ NFSD_LEASE_TIME
* HZ
;
1364 t
= kthread_run(do_recall
, dp
, "%s", "nfs4_cb_recall");
1366 struct nfs4_client
*clp
= dp
->dl_client
;
1368 printk(KERN_INFO
"NFSD: Callback thread failed for "
1369 "for client (clientid %08x/%08x)\n",
1370 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
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 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()
1446 * lookup stateowner.
1458 * called with nfs4_lock_state() held.
1461 nfsd4_process_open1(struct nfsd4_open
*open
)
1464 clientid_t
*clientid
= &open
->op_clientid
;
1465 struct nfs4_client
*clp
= NULL
;
1466 unsigned int strhashval
;
1467 struct nfs4_stateowner
*sop
= NULL
;
1469 status
= nfserr_inval
;
1470 if (!check_name(open
->op_owner
))
1473 if (STALE_CLIENTID(&open
->op_clientid
))
1474 return nfserr_stale_clientid
;
1476 strhashval
= ownerstr_hashval(clientid
->cl_id
, open
->op_owner
);
1477 sop
= find_openstateowner_str(strhashval
, open
);
1479 open
->op_stateowner
= sop
;
1480 /* check for replay */
1481 if (open
->op_seqid
== sop
->so_seqid
){
1482 if (sop
->so_replay
.rp_buflen
)
1483 return NFSERR_REPLAY_ME
;
1485 /* The original OPEN failed so spectacularly
1486 * that we don't even have replay data saved!
1487 * Therefore, we have no choice but to continue
1488 * processing this OPEN; presumably, we'll
1489 * fail again for the same reason.
1491 dprintk("nfsd4_process_open1:"
1492 " replay with no replay cache\n");
1495 } else if (sop
->so_confirmed
) {
1496 if (open
->op_seqid
== sop
->so_seqid
+ 1)
1498 status
= nfserr_bad_seqid
;
1501 /* If we get here, we received an OPEN for an
1502 * unconfirmed nfs4_stateowner. Since the seqid's are
1503 * different, purge the existing nfs4_stateowner, and
1504 * instantiate a new one.
1506 clp
= sop
->so_client
;
1507 release_stateowner(sop
);
1510 /* nfs4_stateowner not found.
1511 * Verify clientid and instantiate new nfs4_stateowner.
1512 * If verify fails this is presumably the result of the
1513 * client's lease expiring.
1515 status
= nfserr_expired
;
1516 clp
= find_confirmed_client(clientid
);
1520 status
= nfserr_resource
;
1521 sop
= alloc_init_open_stateowner(strhashval
, clp
, open
);
1524 open
->op_stateowner
= sop
;
1527 renew_client(sop
->so_client
);
1529 if (status
&& open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
1530 status
= nfserr_reclaim_bad
;
1535 nfs4_check_delegmode(struct nfs4_delegation
*dp
, int flags
)
1537 if ((flags
& WR_STATE
) && (dp
->dl_type
== NFS4_OPEN_DELEGATE_READ
))
1538 return nfserr_openmode
;
1543 static struct nfs4_delegation
*
1544 find_delegation_file(struct nfs4_file
*fp
, stateid_t
*stid
)
1546 struct nfs4_delegation
*dp
;
1548 list_for_each_entry(dp
, &fp
->fi_delegations
, dl_del_perfile
) {
1549 if (dp
->dl_stateid
.si_stateownerid
== stid
->si_stateownerid
)
1556 nfs4_check_deleg(struct nfs4_file
*fp
, struct nfsd4_open
*open
,
1557 struct nfs4_delegation
**dp
)
1560 int status
= nfserr_bad_stateid
;
1562 *dp
= find_delegation_file(fp
, &open
->op_delegate_stateid
);
1565 flags
= open
->op_share_access
== NFS4_SHARE_ACCESS_READ
?
1566 RD_STATE
: WR_STATE
;
1567 status
= nfs4_check_delegmode(*dp
, flags
);
1571 if (open
->op_claim_type
!= NFS4_OPEN_CLAIM_DELEGATE_CUR
)
1575 open
->op_stateowner
->so_confirmed
= 1;
1580 nfs4_check_open(struct nfs4_file
*fp
, struct nfsd4_open
*open
, struct nfs4_stateid
**stpp
)
1582 struct nfs4_stateid
*local
;
1583 int status
= nfserr_share_denied
;
1584 struct nfs4_stateowner
*sop
= open
->op_stateowner
;
1586 list_for_each_entry(local
, &fp
->fi_stateids
, st_perfile
) {
1587 /* ignore lock owners */
1588 if (local
->st_stateowner
->so_is_open_owner
== 0)
1590 /* remember if we have seen this open owner */
1591 if (local
->st_stateowner
== sop
)
1593 /* check for conflicting share reservations */
1594 if (!test_share(local
, open
))
1602 static inline struct nfs4_stateid
*
1603 nfs4_alloc_stateid(void)
1605 return kmem_cache_alloc(stateid_slab
, GFP_KERNEL
);
1609 nfs4_new_open(struct svc_rqst
*rqstp
, struct nfs4_stateid
**stpp
,
1610 struct nfs4_delegation
*dp
,
1611 struct svc_fh
*cur_fh
, int flags
)
1613 struct nfs4_stateid
*stp
;
1615 stp
= nfs4_alloc_stateid();
1617 return nfserr_resource
;
1620 get_file(dp
->dl_vfs_file
);
1621 stp
->st_vfs_file
= dp
->dl_vfs_file
;
1624 status
= nfsd_open(rqstp
, cur_fh
, S_IFREG
, flags
,
1627 if (status
== nfserr_dropit
)
1628 status
= nfserr_jukebox
;
1629 kmem_cache_free(stateid_slab
, stp
);
1638 nfsd4_truncate(struct svc_rqst
*rqstp
, struct svc_fh
*fh
,
1639 struct nfsd4_open
*open
)
1641 struct iattr iattr
= {
1642 .ia_valid
= ATTR_SIZE
,
1645 if (!open
->op_truncate
)
1647 if (!(open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
))
1649 return nfsd_setattr(rqstp
, fh
, &iattr
, 0, (time_t)0);
1653 nfs4_upgrade_open(struct svc_rqst
*rqstp
, struct svc_fh
*cur_fh
, struct nfs4_stateid
*stp
, struct nfsd4_open
*open
)
1655 struct file
*filp
= stp
->st_vfs_file
;
1656 struct inode
*inode
= filp
->f_dentry
->d_inode
;
1657 unsigned int share_access
;
1660 set_access(&share_access
, stp
->st_access_bmap
);
1661 share_access
= ~share_access
;
1662 share_access
&= open
->op_share_access
;
1664 if (!(share_access
& NFS4_SHARE_ACCESS_WRITE
))
1665 return nfsd4_truncate(rqstp
, cur_fh
, open
);
1667 status
= get_write_access(inode
);
1669 return nfserrno(status
);
1670 status
= nfsd4_truncate(rqstp
, cur_fh
, open
);
1672 put_write_access(inode
);
1675 /* remember the open */
1676 filp
->f_mode
= (filp
->f_mode
| FMODE_WRITE
) & ~FMODE_READ
;
1677 set_bit(open
->op_share_access
, &stp
->st_access_bmap
);
1678 set_bit(open
->op_share_deny
, &stp
->st_deny_bmap
);
1684 /* decrement seqid on successful reclaim, it will be bumped in encode_open */
1686 nfs4_set_claim_prev(struct nfsd4_open
*open
, int *status
)
1688 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
) {
1690 *status
= nfserr_reclaim_bad
;
1692 open
->op_stateowner
->so_confirmed
= 1;
1693 open
->op_stateowner
->so_seqid
--;
1699 * Attempt to hand out a delegation.
1702 nfs4_open_delegation(struct svc_fh
*fh
, struct nfsd4_open
*open
, struct nfs4_stateid
*stp
)
1704 struct nfs4_delegation
*dp
;
1705 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
1706 struct nfs4_callback
*cb
= &sop
->so_client
->cl_callback
;
1707 struct file_lock fl
, *flp
= &fl
;
1708 int status
, flag
= 0;
1710 flag
= NFS4_OPEN_DELEGATE_NONE
;
1711 open
->op_recall
= 0;
1712 switch (open
->op_claim_type
) {
1713 case NFS4_OPEN_CLAIM_PREVIOUS
:
1714 if (!atomic_read(&cb
->cb_set
))
1715 open
->op_recall
= 1;
1716 flag
= open
->op_delegate_type
;
1717 if (flag
== NFS4_OPEN_DELEGATE_NONE
)
1720 case NFS4_OPEN_CLAIM_NULL
:
1721 /* Let's not give out any delegations till everyone's
1722 * had the chance to reclaim theirs.... */
1723 if (nfs4_in_grace())
1725 if (!atomic_read(&cb
->cb_set
) || !sop
->so_confirmed
)
1727 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
1728 flag
= NFS4_OPEN_DELEGATE_WRITE
;
1730 flag
= NFS4_OPEN_DELEGATE_READ
;
1736 dp
= alloc_init_deleg(sop
->so_client
, stp
, fh
, flag
);
1738 flag
= NFS4_OPEN_DELEGATE_NONE
;
1741 locks_init_lock(&fl
);
1742 fl
.fl_lmops
= &nfsd_lease_mng_ops
;
1743 fl
.fl_flags
= FL_LEASE
;
1744 fl
.fl_end
= OFFSET_MAX
;
1745 fl
.fl_owner
= (fl_owner_t
)dp
;
1746 fl
.fl_file
= stp
->st_vfs_file
;
1747 fl
.fl_pid
= current
->tgid
;
1749 /* setlease checks to see if delegation should be handed out.
1750 * the lock_manager callbacks fl_mylease and fl_change are used
1752 if ((status
= setlease(stp
->st_vfs_file
,
1753 flag
== NFS4_OPEN_DELEGATE_READ
? F_RDLCK
: F_WRLCK
, &flp
))) {
1754 dprintk("NFSD: setlease failed [%d], no delegation\n", status
);
1755 unhash_delegation(dp
);
1756 flag
= NFS4_OPEN_DELEGATE_NONE
;
1760 memcpy(&open
->op_delegate_stateid
, &dp
->dl_stateid
, sizeof(dp
->dl_stateid
));
1762 dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n",
1763 dp
->dl_stateid
.si_boot
,
1764 dp
->dl_stateid
.si_stateownerid
,
1765 dp
->dl_stateid
.si_fileid
,
1766 dp
->dl_stateid
.si_generation
);
1768 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
1769 && flag
== NFS4_OPEN_DELEGATE_NONE
1770 && open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_NONE
)
1771 printk("NFSD: WARNING: refusing delegation reclaim\n");
1772 open
->op_delegate_type
= flag
;
1776 * called with nfs4_lock_state() held.
1779 nfsd4_process_open2(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
1781 struct nfs4_file
*fp
= NULL
;
1782 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
1783 struct nfs4_stateid
*stp
= NULL
;
1784 struct nfs4_delegation
*dp
= NULL
;
1787 status
= nfserr_inval
;
1788 if (!TEST_ACCESS(open
->op_share_access
) || !TEST_DENY(open
->op_share_deny
))
1791 * Lookup file; if found, lookup stateid and check open request,
1792 * and check for delegations in the process of being recalled.
1793 * If not found, create the nfs4_file struct
1795 fp
= find_file(ino
);
1797 if ((status
= nfs4_check_open(fp
, open
, &stp
)))
1799 status
= nfs4_check_deleg(fp
, open
, &dp
);
1803 status
= nfserr_bad_stateid
;
1804 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
)
1806 status
= nfserr_resource
;
1807 fp
= alloc_init_file(ino
);
1813 * OPEN the file, or upgrade an existing OPEN.
1814 * If truncate fails, the OPEN fails.
1817 /* Stateid was found, this is an OPEN upgrade */
1818 status
= nfs4_upgrade_open(rqstp
, current_fh
, stp
, open
);
1822 /* Stateid was not found, this is a new OPEN */
1824 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
1828 status
= nfs4_new_open(rqstp
, &stp
, dp
, current_fh
, flags
);
1831 init_stateid(stp
, fp
, open
);
1832 status
= nfsd4_truncate(rqstp
, current_fh
, open
);
1834 release_stateid(stp
, OPEN_STATE
);
1838 memcpy(&open
->op_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
1841 * Attempt to hand out a delegation. No error return, because the
1842 * OPEN succeeds even if we fail.
1844 nfs4_open_delegation(current_fh
, open
, stp
);
1848 dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n",
1849 stp
->st_stateid
.si_boot
, stp
->st_stateid
.si_stateownerid
,
1850 stp
->st_stateid
.si_fileid
, stp
->st_stateid
.si_generation
);
1854 /* CLAIM_PREVIOUS has different error returns */
1855 nfs4_set_claim_prev(open
, &status
);
1857 * To finish the open response, we just need to set the rflags.
1859 open
->op_rflags
= NFS4_OPEN_RESULT_LOCKTYPE_POSIX
;
1860 if (!open
->op_stateowner
->so_confirmed
)
1861 open
->op_rflags
|= NFS4_OPEN_RESULT_CONFIRM
;
1866 static struct workqueue_struct
*laundry_wq
;
1867 static struct work_struct laundromat_work
;
1868 static void laundromat_main(void *);
1869 static DECLARE_WORK(laundromat_work
, laundromat_main
, NULL
);
1872 nfsd4_renew(clientid_t
*clid
)
1874 struct nfs4_client
*clp
;
1878 dprintk("process_renew(%08x/%08x): starting\n",
1879 clid
->cl_boot
, clid
->cl_id
);
1880 status
= nfserr_stale_clientid
;
1881 if (STALE_CLIENTID(clid
))
1883 clp
= find_confirmed_client(clid
);
1884 status
= nfserr_expired
;
1886 /* We assume the client took too long to RENEW. */
1887 dprintk("nfsd4_renew: clientid not found!\n");
1891 status
= nfserr_cb_path_down
;
1892 if (!list_empty(&clp
->cl_del_perclnt
)
1893 && !atomic_read(&clp
->cl_callback
.cb_set
))
1897 nfs4_unlock_state();
1902 nfs4_laundromat(void)
1904 struct nfs4_client
*clp
;
1905 struct nfs4_stateowner
*sop
;
1906 struct nfs4_delegation
*dp
;
1907 struct list_head
*pos
, *next
, reaplist
;
1908 time_t cutoff
= get_seconds() - NFSD_LEASE_TIME
;
1909 time_t t
, clientid_val
= NFSD_LEASE_TIME
;
1910 time_t u
, test_val
= NFSD_LEASE_TIME
;
1914 dprintk("NFSD: laundromat service - starting\n");
1915 list_for_each_safe(pos
, next
, &client_lru
) {
1916 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
1917 if (time_after((unsigned long)clp
->cl_time
, (unsigned long)cutoff
)) {
1918 t
= clp
->cl_time
- cutoff
;
1919 if (clientid_val
> t
)
1923 dprintk("NFSD: purging unused client (clientid %08x)\n",
1924 clp
->cl_clientid
.cl_id
);
1927 INIT_LIST_HEAD(&reaplist
);
1928 spin_lock(&recall_lock
);
1929 list_for_each_safe(pos
, next
, &del_recall_lru
) {
1930 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
1931 if (time_after((unsigned long)dp
->dl_time
, (unsigned long)cutoff
)) {
1932 u
= dp
->dl_time
- cutoff
;
1937 dprintk("NFSD: purging unused delegation dp %p, fp %p\n",
1939 list_move(&dp
->dl_recall_lru
, &reaplist
);
1941 spin_unlock(&recall_lock
);
1942 list_for_each_safe(pos
, next
, &reaplist
) {
1943 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
1944 list_del_init(&dp
->dl_recall_lru
);
1945 unhash_delegation(dp
);
1947 test_val
= NFSD_LEASE_TIME
;
1948 list_for_each_safe(pos
, next
, &close_lru
) {
1949 sop
= list_entry(pos
, struct nfs4_stateowner
, so_close_lru
);
1950 if (time_after((unsigned long)sop
->so_time
, (unsigned long)cutoff
)) {
1951 u
= sop
->so_time
- cutoff
;
1956 dprintk("NFSD: purging unused open stateowner (so_id %d)\n",
1958 list_del(&sop
->so_close_lru
);
1959 nfs4_put_stateowner(sop
);
1961 if (clientid_val
< NFSD_LAUNDROMAT_MINTIMEOUT
)
1962 clientid_val
= NFSD_LAUNDROMAT_MINTIMEOUT
;
1963 nfs4_unlock_state();
1964 return clientid_val
;
1968 laundromat_main(void *not_used
)
1972 t
= nfs4_laundromat();
1973 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t
);
1974 queue_delayed_work(laundry_wq
, &laundromat_work
, t
*HZ
);
1977 /* search ownerid_hashtbl[] and close_lru for stateid owner
1978 * (stateid->si_stateownerid)
1980 struct nfs4_stateowner
*
1981 find_openstateowner_id(u32 st_id
, int flags
) {
1982 struct nfs4_stateowner
*local
= NULL
;
1984 dprintk("NFSD: find_openstateowner_id %d\n", st_id
);
1985 if (flags
& CLOSE_STATE
) {
1986 list_for_each_entry(local
, &close_lru
, so_close_lru
) {
1987 if (local
->so_id
== st_id
)
1995 nfs4_check_fh(struct svc_fh
*fhp
, struct nfs4_stateid
*stp
)
1997 return fhp
->fh_dentry
->d_inode
!= stp
->st_vfs_file
->f_dentry
->d_inode
;
2001 STALE_STATEID(stateid_t
*stateid
)
2003 if (stateid
->si_boot
== boot_time
)
2005 printk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n",
2006 stateid
->si_boot
, stateid
->si_stateownerid
, stateid
->si_fileid
,
2007 stateid
->si_generation
);
2012 access_permit_read(unsigned long access_bmap
)
2014 return test_bit(NFS4_SHARE_ACCESS_READ
, &access_bmap
) ||
2015 test_bit(NFS4_SHARE_ACCESS_BOTH
, &access_bmap
) ||
2016 test_bit(NFS4_SHARE_ACCESS_WRITE
, &access_bmap
);
2020 access_permit_write(unsigned long access_bmap
)
2022 return test_bit(NFS4_SHARE_ACCESS_WRITE
, &access_bmap
) ||
2023 test_bit(NFS4_SHARE_ACCESS_BOTH
, &access_bmap
);
2027 int nfs4_check_openmode(struct nfs4_stateid
*stp
, int flags
)
2029 int status
= nfserr_openmode
;
2031 if ((flags
& WR_STATE
) && (!access_permit_write(stp
->st_access_bmap
)))
2033 if ((flags
& RD_STATE
) && (!access_permit_read(stp
->st_access_bmap
)))
2041 check_special_stateids(svc_fh
*current_fh
, stateid_t
*stateid
, int flags
)
2043 /* Trying to call delegreturn with a special stateid? Yuch: */
2044 if (!(flags
& (RD_STATE
| WR_STATE
)))
2045 return nfserr_bad_stateid
;
2046 else if (ONE_STATEID(stateid
) && (flags
& RD_STATE
))
2048 else if (nfs4_in_grace()) {
2049 /* Answer in remaining cases depends on existance of
2050 * conflicting state; so we must wait out the grace period. */
2051 return nfserr_grace
;
2052 } else if (flags
& WR_STATE
)
2053 return nfs4_share_conflict(current_fh
,
2054 NFS4_SHARE_DENY_WRITE
);
2055 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
2056 return nfs4_share_conflict(current_fh
,
2057 NFS4_SHARE_DENY_READ
);
2061 * Allow READ/WRITE during grace period on recovered state only for files
2062 * that are not able to provide mandatory locking.
2065 io_during_grace_disallowed(struct inode
*inode
, int flags
)
2067 return nfs4_in_grace() && (flags
& (RD_STATE
| WR_STATE
))
2068 && MANDATORY_LOCK(inode
);
2072 * Checks for stateid operations
2075 nfs4_preprocess_stateid_op(struct svc_fh
*current_fh
, stateid_t
*stateid
, int flags
, struct file
**filpp
)
2077 struct nfs4_stateid
*stp
= NULL
;
2078 struct nfs4_delegation
*dp
= NULL
;
2080 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
2083 dprintk("NFSD: preprocess_stateid_op: stateid = (%08x/%08x/%08x/%08x)\n",
2084 stateid
->si_boot
, stateid
->si_stateownerid
,
2085 stateid
->si_fileid
, stateid
->si_generation
);
2089 if (io_during_grace_disallowed(ino
, flags
))
2090 return nfserr_grace
;
2092 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
2093 return check_special_stateids(current_fh
, stateid
, flags
);
2096 status
= nfserr_stale_stateid
;
2097 if (STALE_STATEID(stateid
))
2101 status
= nfserr_bad_stateid
;
2102 if (!stateid
->si_fileid
) { /* delegation stateid */
2103 if(!(dp
= find_delegation_stateid(ino
, stateid
))) {
2104 dprintk("NFSD: delegation stateid not found\n");
2105 if (nfs4_in_grace())
2106 status
= nfserr_grace
;
2109 stidp
= &dp
->dl_stateid
;
2110 } else { /* open or lock stateid */
2111 if (!(stp
= find_stateid(stateid
, flags
))) {
2112 dprintk("NFSD: open or lock stateid not found\n");
2113 if (nfs4_in_grace())
2114 status
= nfserr_grace
;
2117 if ((flags
& CHECK_FH
) && nfs4_check_fh(current_fh
, stp
))
2119 if (!stp
->st_stateowner
->so_confirmed
)
2121 stidp
= &stp
->st_stateid
;
2123 if (stateid
->si_generation
> stidp
->si_generation
)
2127 status
= nfserr_old_stateid
;
2128 if (stateid
->si_generation
< stidp
->si_generation
)
2131 if ((status
= nfs4_check_openmode(stp
,flags
)))
2133 renew_client(stp
->st_stateowner
->so_client
);
2135 *filpp
= stp
->st_vfs_file
;
2137 if ((status
= nfs4_check_delegmode(dp
, flags
)))
2139 renew_client(dp
->dl_client
);
2140 if (flags
& DELEG_RET
)
2141 unhash_delegation(dp
);
2143 *filpp
= dp
->dl_vfs_file
;
2152 * Checks for sequence id mutating operations.
2155 nfs4_preprocess_seqid_op(struct svc_fh
*current_fh
, u32 seqid
, stateid_t
*stateid
, int flags
, struct nfs4_stateowner
**sopp
, struct nfs4_stateid
**stpp
, clientid_t
*lockclid
)
2158 struct nfs4_stateid
*stp
;
2159 struct nfs4_stateowner
*sop
;
2161 dprintk("NFSD: preprocess_seqid_op: seqid=%d "
2162 "stateid = (%08x/%08x/%08x/%08x)\n", seqid
,
2163 stateid
->si_boot
, stateid
->si_stateownerid
, stateid
->si_fileid
,
2164 stateid
->si_generation
);
2169 status
= nfserr_bad_stateid
;
2170 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
)) {
2171 printk("NFSD: preprocess_seqid_op: magic stateid!\n");
2175 status
= nfserr_stale_stateid
;
2176 if (STALE_STATEID(stateid
))
2179 * We return BAD_STATEID if filehandle doesn't match stateid,
2180 * the confirmed flag is incorrecly set, or the generation
2181 * number is incorrect.
2182 * If there is no entry in the openfile table for this id,
2183 * we can't always return BAD_STATEID;
2184 * this might be a retransmitted CLOSE which has arrived after
2185 * the openfile has been released.
2187 if (!(stp
= find_stateid(stateid
, flags
)))
2188 goto no_nfs4_stateid
;
2190 status
= nfserr_bad_stateid
;
2192 /* for new lock stateowners:
2193 * check that the lock->v.new.open_stateid
2194 * refers to an open stateowner
2196 * check that the lockclid (nfs4_lock->v.new.clientid) is the same
2197 * as the open_stateid->st_stateowner->so_client->clientid
2200 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
2201 struct nfs4_client
*clp
= sop
->so_client
;
2203 if (!sop
->so_is_open_owner
)
2205 if (!cmp_clid(&clp
->cl_clientid
, lockclid
))
2209 if ((flags
& CHECK_FH
) && nfs4_check_fh(current_fh
, stp
)) {
2210 printk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n");
2215 *sopp
= sop
= stp
->st_stateowner
;
2218 * We now validate the seqid and stateid generation numbers.
2219 * For the moment, we ignore the possibility of
2220 * generation number wraparound.
2222 if (seqid
!= sop
->so_seqid
+ 1)
2225 if (sop
->so_confirmed
) {
2226 if (flags
& CONFIRM
) {
2227 printk("NFSD: preprocess_seqid_op: expected unconfirmed stateowner!\n");
2232 if (!(flags
& CONFIRM
)) {
2233 printk("NFSD: preprocess_seqid_op: stateowner not confirmed yet!\n");
2237 if (stateid
->si_generation
> stp
->st_stateid
.si_generation
) {
2238 printk("NFSD: preprocess_seqid_op: future stateid?!\n");
2242 status
= nfserr_old_stateid
;
2243 if (stateid
->si_generation
< stp
->st_stateid
.si_generation
) {
2244 printk("NFSD: preprocess_seqid_op: old stateid!\n");
2247 /* XXX renew the client lease here */
2256 * We determine whether this is a bad stateid or a replay,
2257 * starting by trying to look up the stateowner.
2258 * If stateowner is not found - stateid is bad.
2260 if (!(sop
= find_openstateowner_id(stateid
->si_stateownerid
, flags
))) {
2261 printk("NFSD: preprocess_seqid_op: no stateowner or nfs4_stateid!\n");
2262 status
= nfserr_bad_stateid
;
2268 if (seqid
== sop
->so_seqid
) {
2269 printk("NFSD: preprocess_seqid_op: retransmission?\n");
2270 /* indicate replay to calling function */
2271 status
= NFSERR_REPLAY_ME
;
2273 printk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d\n", sop
->so_seqid
+1, seqid
);
2276 status
= nfserr_bad_seqid
;
2282 nfsd4_open_confirm(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open_confirm
*oc
)
2285 struct nfs4_stateowner
*sop
;
2286 struct nfs4_stateid
*stp
;
2288 dprintk("NFSD: nfsd4_open_confirm on file %.*s\n",
2289 (int)current_fh
->fh_dentry
->d_name
.len
,
2290 current_fh
->fh_dentry
->d_name
.name
);
2292 if ((status
= fh_verify(rqstp
, current_fh
, S_IFREG
, 0)))
2297 if ((status
= nfs4_preprocess_seqid_op(current_fh
, oc
->oc_seqid
,
2298 &oc
->oc_req_stateid
,
2299 CHECK_FH
| CONFIRM
| OPEN_STATE
,
2300 &oc
->oc_stateowner
, &stp
, NULL
)))
2303 sop
= oc
->oc_stateowner
;
2304 sop
->so_confirmed
= 1;
2305 update_stateid(&stp
->st_stateid
);
2306 memcpy(&oc
->oc_resp_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
2307 dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d "
2308 "stateid=(%08x/%08x/%08x/%08x)\n", oc
->oc_seqid
,
2309 stp
->st_stateid
.si_boot
,
2310 stp
->st_stateid
.si_stateownerid
,
2311 stp
->st_stateid
.si_fileid
,
2312 stp
->st_stateid
.si_generation
);
2314 if (oc
->oc_stateowner
)
2315 nfs4_get_stateowner(oc
->oc_stateowner
);
2316 nfs4_unlock_state();
2322 * unset all bits in union bitmap (bmap) that
2323 * do not exist in share (from successful OPEN_DOWNGRADE)
2326 reset_union_bmap_access(unsigned long access
, unsigned long *bmap
)
2329 for (i
= 1; i
< 4; i
++) {
2330 if ((i
& access
) != i
)
2331 __clear_bit(i
, bmap
);
2336 reset_union_bmap_deny(unsigned long deny
, unsigned long *bmap
)
2339 for (i
= 0; i
< 4; i
++) {
2340 if ((i
& deny
) != i
)
2341 __clear_bit(i
, bmap
);
2346 nfsd4_open_downgrade(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open_downgrade
*od
)
2349 struct nfs4_stateid
*stp
;
2350 unsigned int share_access
;
2352 dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n",
2353 (int)current_fh
->fh_dentry
->d_name
.len
,
2354 current_fh
->fh_dentry
->d_name
.name
);
2356 if (!TEST_ACCESS(od
->od_share_access
) || !TEST_DENY(od
->od_share_deny
))
2357 return nfserr_inval
;
2360 if ((status
= nfs4_preprocess_seqid_op(current_fh
, od
->od_seqid
,
2362 CHECK_FH
| OPEN_STATE
,
2363 &od
->od_stateowner
, &stp
, NULL
)))
2366 status
= nfserr_inval
;
2367 if (!test_bit(od
->od_share_access
, &stp
->st_access_bmap
)) {
2368 dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n",
2369 stp
->st_access_bmap
, od
->od_share_access
);
2372 if (!test_bit(od
->od_share_deny
, &stp
->st_deny_bmap
)) {
2373 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
2374 stp
->st_deny_bmap
, od
->od_share_deny
);
2377 set_access(&share_access
, stp
->st_access_bmap
);
2378 nfs4_file_downgrade(stp
->st_vfs_file
,
2379 share_access
& ~od
->od_share_access
);
2381 reset_union_bmap_access(od
->od_share_access
, &stp
->st_access_bmap
);
2382 reset_union_bmap_deny(od
->od_share_deny
, &stp
->st_deny_bmap
);
2384 update_stateid(&stp
->st_stateid
);
2385 memcpy(&od
->od_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
2388 if (od
->od_stateowner
)
2389 nfs4_get_stateowner(od
->od_stateowner
);
2390 nfs4_unlock_state();
2395 * nfs4_unlock_state() called after encode
2398 nfsd4_close(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_close
*close
)
2401 struct nfs4_stateid
*stp
;
2403 dprintk("NFSD: nfsd4_close on file %.*s\n",
2404 (int)current_fh
->fh_dentry
->d_name
.len
,
2405 current_fh
->fh_dentry
->d_name
.name
);
2408 /* check close_lru for replay */
2409 if ((status
= nfs4_preprocess_seqid_op(current_fh
, close
->cl_seqid
,
2411 CHECK_FH
| OPEN_STATE
| CLOSE_STATE
,
2412 &close
->cl_stateowner
, &stp
, NULL
)))
2415 * Return success, but first update the stateid.
2418 update_stateid(&stp
->st_stateid
);
2419 memcpy(&close
->cl_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
2421 /* release_state_owner() calls nfsd_close() if needed */
2422 release_state_owner(stp
, OPEN_STATE
);
2424 if (close
->cl_stateowner
)
2425 nfs4_get_stateowner(close
->cl_stateowner
);
2426 nfs4_unlock_state();
2431 nfsd4_delegreturn(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_delegreturn
*dr
)
2435 if ((status
= fh_verify(rqstp
, current_fh
, S_IFREG
, 0)))
2439 status
= nfs4_preprocess_stateid_op(current_fh
, &dr
->dr_stateid
, DELEG_RET
, NULL
);
2440 nfs4_unlock_state();
2447 * Lock owner state (byte-range locks)
2449 #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
2450 #define LOCK_HASH_BITS 8
2451 #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS)
2452 #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1)
2454 #define lockownerid_hashval(id) \
2455 ((id) & LOCK_HASH_MASK)
2457 static inline unsigned int
2458 lock_ownerstr_hashval(struct inode
*inode
, u32 cl_id
,
2459 struct xdr_netobj
*ownername
)
2461 return (file_hashval(inode
) + cl_id
2462 + opaque_hashval(ownername
->data
, ownername
->len
))
2466 static struct list_head lock_ownerid_hashtbl
[LOCK_HASH_SIZE
];
2467 static struct list_head lock_ownerstr_hashtbl
[LOCK_HASH_SIZE
];
2468 static struct list_head lockstateid_hashtbl
[STATEID_HASH_SIZE
];
2470 struct nfs4_stateid
*
2471 find_stateid(stateid_t
*stid
, int flags
)
2473 struct nfs4_stateid
*local
= NULL
;
2474 u32 st_id
= stid
->si_stateownerid
;
2475 u32 f_id
= stid
->si_fileid
;
2476 unsigned int hashval
;
2478 dprintk("NFSD: find_stateid flags 0x%x\n",flags
);
2479 if ((flags
& LOCK_STATE
) || (flags
& RD_STATE
) || (flags
& WR_STATE
)) {
2480 hashval
= stateid_hashval(st_id
, f_id
);
2481 list_for_each_entry(local
, &lockstateid_hashtbl
[hashval
], st_hash
) {
2482 if ((local
->st_stateid
.si_stateownerid
== st_id
) &&
2483 (local
->st_stateid
.si_fileid
== f_id
))
2487 if ((flags
& OPEN_STATE
) || (flags
& RD_STATE
) || (flags
& WR_STATE
)) {
2488 hashval
= stateid_hashval(st_id
, f_id
);
2489 list_for_each_entry(local
, &stateid_hashtbl
[hashval
], st_hash
) {
2490 if ((local
->st_stateid
.si_stateownerid
== st_id
) &&
2491 (local
->st_stateid
.si_fileid
== f_id
))
2495 printk("NFSD: find_stateid: ERROR: no state flag\n");
2499 static struct nfs4_delegation
*
2500 find_delegation_stateid(struct inode
*ino
, stateid_t
*stid
)
2502 struct nfs4_file
*fp
;
2503 struct nfs4_delegation
*dl
;
2505 dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n",
2506 stid
->si_boot
, stid
->si_stateownerid
,
2507 stid
->si_fileid
, stid
->si_generation
);
2509 fp
= find_file(ino
);
2512 dl
= find_delegation_file(fp
, stid
);
2518 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
2519 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
2520 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
2521 * locking, this prevents us from being completely protocol-compliant. The
2522 * real solution to this problem is to start using unsigned file offsets in
2523 * the VFS, but this is a very deep change!
2526 nfs4_transform_lock_offset(struct file_lock
*lock
)
2528 if (lock
->fl_start
< 0)
2529 lock
->fl_start
= OFFSET_MAX
;
2530 if (lock
->fl_end
< 0)
2531 lock
->fl_end
= OFFSET_MAX
;
2535 nfs4_verify_lock_stateowner(struct nfs4_stateowner
*sop
, unsigned int hashval
)
2537 struct nfs4_stateowner
*local
= NULL
;
2540 if (hashval
>= LOCK_HASH_SIZE
)
2542 list_for_each_entry(local
, &lock_ownerid_hashtbl
[hashval
], so_idhash
) {
2554 nfs4_set_lock_denied(struct file_lock
*fl
, struct nfsd4_lock_denied
*deny
)
2556 struct nfs4_stateowner
*sop
= (struct nfs4_stateowner
*) fl
->fl_owner
;
2557 unsigned int hval
= lockownerid_hashval(sop
->so_id
);
2559 deny
->ld_sop
= NULL
;
2560 if (nfs4_verify_lock_stateowner(sop
, hval
)) {
2561 kref_get(&sop
->so_ref
);
2563 deny
->ld_clientid
= sop
->so_client
->cl_clientid
;
2565 deny
->ld_start
= fl
->fl_start
;
2566 deny
->ld_length
= ~(u64
)0;
2567 if (fl
->fl_end
!= ~(u64
)0)
2568 deny
->ld_length
= fl
->fl_end
- fl
->fl_start
+ 1;
2569 deny
->ld_type
= NFS4_READ_LT
;
2570 if (fl
->fl_type
!= F_RDLCK
)
2571 deny
->ld_type
= NFS4_WRITE_LT
;
2574 static struct nfs4_stateowner
*
2575 find_lockstateowner(struct xdr_netobj
*owner
, clientid_t
*clid
)
2577 struct nfs4_stateowner
*local
= NULL
;
2580 for (i
= 0; i
< LOCK_HASH_SIZE
; i
++) {
2581 list_for_each_entry(local
, &lock_ownerid_hashtbl
[i
], so_idhash
) {
2582 if (!cmp_owner_str(local
, owner
, clid
))
2590 static struct nfs4_stateowner
*
2591 find_lockstateowner_str(struct inode
*inode
, clientid_t
*clid
,
2592 struct xdr_netobj
*owner
)
2594 unsigned int hashval
= lock_ownerstr_hashval(inode
, clid
->cl_id
, owner
);
2595 struct nfs4_stateowner
*op
;
2597 list_for_each_entry(op
, &lock_ownerstr_hashtbl
[hashval
], so_strhash
) {
2598 if (cmp_owner_str(op
, owner
, clid
))
2605 * Alloc a lock owner structure.
2606 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
2609 * strhashval = lock_ownerstr_hashval
2610 * so_seqid = lock->lk_new_lock_seqid - 1: it gets bumped in encode
2613 static struct nfs4_stateowner
*
2614 alloc_init_lock_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_stateid
*open_stp
, struct nfsd4_lock
*lock
) {
2615 struct nfs4_stateowner
*sop
;
2616 struct nfs4_replay
*rp
;
2617 unsigned int idhashval
;
2619 if (!(sop
= alloc_stateowner(&lock
->lk_new_owner
)))
2621 idhashval
= lockownerid_hashval(current_ownerid
);
2622 INIT_LIST_HEAD(&sop
->so_idhash
);
2623 INIT_LIST_HEAD(&sop
->so_strhash
);
2624 INIT_LIST_HEAD(&sop
->so_perclient
);
2625 INIT_LIST_HEAD(&sop
->so_perfilestate
);
2626 INIT_LIST_HEAD(&sop
->so_perlockowner
);
2627 INIT_LIST_HEAD(&sop
->so_close_lru
); /* not used */
2629 list_add(&sop
->so_idhash
, &lock_ownerid_hashtbl
[idhashval
]);
2630 list_add(&sop
->so_strhash
, &lock_ownerstr_hashtbl
[strhashval
]);
2631 list_add(&sop
->so_perlockowner
, &open_stp
->st_perlockowner
);
2632 sop
->so_is_open_owner
= 0;
2633 sop
->so_id
= current_ownerid
++;
2634 sop
->so_client
= clp
;
2635 sop
->so_seqid
= lock
->lk_new_lock_seqid
- 1;
2636 sop
->so_confirmed
= 1;
2637 rp
= &sop
->so_replay
;
2638 rp
->rp_status
= NFSERR_SERVERFAULT
;
2640 rp
->rp_buf
= rp
->rp_ibuf
;
2644 struct nfs4_stateid
*
2645 alloc_init_lock_stateid(struct nfs4_stateowner
*sop
, struct nfs4_file
*fp
, struct nfs4_stateid
*open_stp
)
2647 struct nfs4_stateid
*stp
;
2648 unsigned int hashval
= stateid_hashval(sop
->so_id
, fp
->fi_id
);
2650 stp
= nfs4_alloc_stateid();
2653 INIT_LIST_HEAD(&stp
->st_hash
);
2654 INIT_LIST_HEAD(&stp
->st_perfile
);
2655 INIT_LIST_HEAD(&stp
->st_perfilestate
);
2656 INIT_LIST_HEAD(&stp
->st_perlockowner
); /* not used */
2657 list_add(&stp
->st_hash
, &lockstateid_hashtbl
[hashval
]);
2658 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
2659 list_add(&stp
->st_perfilestate
, &sop
->so_perfilestate
);
2660 stp
->st_stateowner
= sop
;
2663 stp
->st_stateid
.si_boot
= boot_time
;
2664 stp
->st_stateid
.si_stateownerid
= sop
->so_id
;
2665 stp
->st_stateid
.si_fileid
= fp
->fi_id
;
2666 stp
->st_stateid
.si_generation
= 0;
2667 stp
->st_vfs_file
= open_stp
->st_vfs_file
; /* FIXME refcount?? */
2668 stp
->st_access_bmap
= open_stp
->st_access_bmap
;
2669 stp
->st_deny_bmap
= open_stp
->st_deny_bmap
;
2676 check_lock_length(u64 offset
, u64 length
)
2678 return ((length
== 0) || ((length
!= ~(u64
)0) &&
2679 LOFF_OVERFLOW(offset
, length
)));
2686 nfsd4_lock(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_lock
*lock
)
2688 struct nfs4_stateowner
*lock_sop
= NULL
, *open_sop
= NULL
;
2689 struct nfs4_stateid
*lock_stp
;
2691 struct file_lock file_lock
;
2692 struct file_lock
*conflock
;
2694 unsigned int strhashval
;
2696 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
2697 (long long) lock
->lk_offset
,
2698 (long long) lock
->lk_length
);
2700 if (nfs4_in_grace() && !lock
->lk_reclaim
)
2701 return nfserr_grace
;
2702 if (!nfs4_in_grace() && lock
->lk_reclaim
)
2703 return nfserr_no_grace
;
2705 if (check_lock_length(lock
->lk_offset
, lock
->lk_length
))
2706 return nfserr_inval
;
2710 if (lock
->lk_is_new
) {
2712 * Client indicates that this is a new lockowner.
2713 * Use open owner and open stateid to create lock owner and lock
2716 struct nfs4_stateid
*open_stp
= NULL
;
2717 struct nfs4_file
*fp
;
2719 status
= nfserr_stale_clientid
;
2720 if (STALE_CLIENTID(&lock
->lk_new_clientid
)) {
2721 printk("NFSD: nfsd4_lock: clientid is stale!\n");
2725 /* is the new lock seqid presented by the client zero? */
2726 status
= nfserr_bad_seqid
;
2727 if (lock
->v
.new.lock_seqid
!= 0)
2730 /* validate and update open stateid and open seqid */
2731 status
= nfs4_preprocess_seqid_op(current_fh
,
2732 lock
->lk_new_open_seqid
,
2733 &lock
->lk_new_open_stateid
,
2734 CHECK_FH
| OPEN_STATE
,
2735 &open_sop
, &open_stp
,
2736 &lock
->v
.new.clientid
);
2738 if (lock
->lk_reclaim
)
2739 status
= nfserr_reclaim_bad
;
2742 /* create lockowner and lock stateid */
2743 fp
= open_stp
->st_file
;
2744 strhashval
= lock_ownerstr_hashval(fp
->fi_inode
,
2745 open_sop
->so_client
->cl_clientid
.cl_id
,
2746 &lock
->v
.new.owner
);
2748 * If we already have this lock owner, the client is in
2749 * error (or our bookeeping is wrong!)
2750 * for asking for a 'new lock'.
2752 status
= nfserr_bad_stateid
;
2753 lock_sop
= find_lockstateowner(&lock
->v
.new.owner
,
2754 &lock
->v
.new.clientid
);
2757 status
= nfserr_resource
;
2758 if (!(lock
->lk_stateowner
= alloc_init_lock_stateowner(strhashval
, open_sop
->so_client
, open_stp
, lock
)))
2760 if ((lock_stp
= alloc_init_lock_stateid(lock
->lk_stateowner
,
2761 fp
, open_stp
)) == NULL
) {
2762 release_stateowner(lock
->lk_stateowner
);
2763 lock
->lk_stateowner
= NULL
;
2766 /* bump the open seqid used to create the lock */
2767 open_sop
->so_seqid
++;
2769 /* lock (lock owner + lock stateid) already exists */
2770 status
= nfs4_preprocess_seqid_op(current_fh
,
2771 lock
->lk_old_lock_seqid
,
2772 &lock
->lk_old_lock_stateid
,
2773 CHECK_FH
| LOCK_STATE
,
2774 &lock
->lk_stateowner
, &lock_stp
, NULL
);
2778 /* lock->lk_stateowner and lock_stp have been created or found */
2779 filp
= lock_stp
->st_vfs_file
;
2781 if ((status
= fh_verify(rqstp
, current_fh
, S_IFREG
, MAY_LOCK
))) {
2782 printk("NFSD: nfsd4_lock: permission denied!\n");
2786 locks_init_lock(&file_lock
);
2787 switch (lock
->lk_type
) {
2790 file_lock
.fl_type
= F_RDLCK
;
2793 case NFS4_WRITEW_LT
:
2794 file_lock
.fl_type
= F_WRLCK
;
2797 status
= nfserr_inval
;
2800 file_lock
.fl_owner
= (fl_owner_t
) lock
->lk_stateowner
;
2801 file_lock
.fl_pid
= current
->tgid
;
2802 file_lock
.fl_file
= filp
;
2803 file_lock
.fl_flags
= FL_POSIX
;
2805 file_lock
.fl_start
= lock
->lk_offset
;
2806 if ((lock
->lk_length
== ~(u64
)0) ||
2807 LOFF_OVERFLOW(lock
->lk_offset
, lock
->lk_length
))
2808 file_lock
.fl_end
= ~(u64
)0;
2810 file_lock
.fl_end
= lock
->lk_offset
+ lock
->lk_length
- 1;
2811 nfs4_transform_lock_offset(&file_lock
);
2814 * Try to lock the file in the VFS.
2815 * Note: locks.c uses the BKL to protect the inode's lock list.
2818 status
= posix_lock_file(filp
, &file_lock
);
2819 if (file_lock
.fl_ops
&& file_lock
.fl_ops
->fl_release_private
)
2820 file_lock
.fl_ops
->fl_release_private(&file_lock
);
2821 dprintk("NFSD: nfsd4_lock: posix_lock_file status %d\n",status
);
2823 case 0: /* success! */
2824 update_stateid(&lock_stp
->st_stateid
);
2825 memcpy(&lock
->lk_resp_stateid
, &lock_stp
->st_stateid
,
2829 goto conflicting_lock
;
2831 status
= nfserr_deadlock
;
2833 dprintk("NFSD: nfsd4_lock: posix_lock_file() failed! status %d\n",status
);
2834 goto out_destroy_new_stateid
;
2838 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
2839 status
= nfserr_denied
;
2840 /* XXX There is a race here. Future patch needed to provide
2841 * an atomic posix_lock_and_test_file
2843 if (!(conflock
= posix_test_lock(filp
, &file_lock
))) {
2844 status
= nfserr_serverfault
;
2847 nfs4_set_lock_denied(conflock
, &lock
->lk_denied
);
2849 out_destroy_new_stateid
:
2850 if (lock
->lk_is_new
) {
2851 dprintk("NFSD: nfsd4_lock: destroy new stateid!\n");
2853 * An error encountered after instantiation of the new
2854 * stateid has forced us to destroy it.
2856 if (!seqid_mutating_err(status
))
2857 open_sop
->so_seqid
--;
2859 release_state_owner(lock_stp
, LOCK_STATE
);
2862 if (lock
->lk_stateowner
)
2863 nfs4_get_stateowner(lock
->lk_stateowner
);
2864 nfs4_unlock_state();
2872 nfsd4_lockt(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_lockt
*lockt
)
2874 struct inode
*inode
;
2876 struct file_lock file_lock
;
2877 struct file_lock
*conflicting_lock
;
2880 if (nfs4_in_grace())
2881 return nfserr_grace
;
2883 if (check_lock_length(lockt
->lt_offset
, lockt
->lt_length
))
2884 return nfserr_inval
;
2886 lockt
->lt_stateowner
= NULL
;
2889 status
= nfserr_stale_clientid
;
2890 if (STALE_CLIENTID(&lockt
->lt_clientid
)) {
2891 printk("NFSD: nfsd4_lockt: clientid is stale!\n");
2895 if ((status
= fh_verify(rqstp
, current_fh
, S_IFREG
, 0))) {
2896 printk("NFSD: nfsd4_lockt: fh_verify() failed!\n");
2897 if (status
== nfserr_symlink
)
2898 status
= nfserr_inval
;
2902 inode
= current_fh
->fh_dentry
->d_inode
;
2903 locks_init_lock(&file_lock
);
2904 switch (lockt
->lt_type
) {
2907 file_lock
.fl_type
= F_RDLCK
;
2910 case NFS4_WRITEW_LT
:
2911 file_lock
.fl_type
= F_WRLCK
;
2914 printk("NFSD: nfs4_lockt: bad lock type!\n");
2915 status
= nfserr_inval
;
2919 lockt
->lt_stateowner
= find_lockstateowner_str(inode
,
2920 &lockt
->lt_clientid
, &lockt
->lt_owner
);
2921 if (lockt
->lt_stateowner
)
2922 file_lock
.fl_owner
= (fl_owner_t
)lockt
->lt_stateowner
;
2923 file_lock
.fl_pid
= current
->tgid
;
2924 file_lock
.fl_flags
= FL_POSIX
;
2926 file_lock
.fl_start
= lockt
->lt_offset
;
2927 if ((lockt
->lt_length
== ~(u64
)0) || LOFF_OVERFLOW(lockt
->lt_offset
, lockt
->lt_length
))
2928 file_lock
.fl_end
= ~(u64
)0;
2930 file_lock
.fl_end
= lockt
->lt_offset
+ lockt
->lt_length
- 1;
2932 nfs4_transform_lock_offset(&file_lock
);
2934 /* posix_test_lock uses the struct file _only_ to resolve the inode.
2935 * since LOCKT doesn't require an OPEN, and therefore a struct
2936 * file may not exist, pass posix_test_lock a struct file with
2937 * only the dentry:inode set.
2939 memset(&file
, 0, sizeof (struct file
));
2940 file
.f_dentry
= current_fh
->fh_dentry
;
2943 conflicting_lock
= posix_test_lock(&file
, &file_lock
);
2944 if (conflicting_lock
) {
2945 status
= nfserr_denied
;
2946 nfs4_set_lock_denied(conflicting_lock
, &lockt
->lt_denied
);
2949 nfs4_unlock_state();
2954 nfsd4_locku(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_locku
*locku
)
2956 struct nfs4_stateid
*stp
;
2957 struct file
*filp
= NULL
;
2958 struct file_lock file_lock
;
2961 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
2962 (long long) locku
->lu_offset
,
2963 (long long) locku
->lu_length
);
2965 if (check_lock_length(locku
->lu_offset
, locku
->lu_length
))
2966 return nfserr_inval
;
2970 if ((status
= nfs4_preprocess_seqid_op(current_fh
,
2973 CHECK_FH
| LOCK_STATE
,
2974 &locku
->lu_stateowner
, &stp
, NULL
)))
2977 filp
= stp
->st_vfs_file
;
2979 locks_init_lock(&file_lock
);
2980 file_lock
.fl_type
= F_UNLCK
;
2981 file_lock
.fl_owner
= (fl_owner_t
) locku
->lu_stateowner
;
2982 file_lock
.fl_pid
= current
->tgid
;
2983 file_lock
.fl_file
= filp
;
2984 file_lock
.fl_flags
= FL_POSIX
;
2985 file_lock
.fl_start
= locku
->lu_offset
;
2987 if ((locku
->lu_length
== ~(u64
)0) || LOFF_OVERFLOW(locku
->lu_offset
, locku
->lu_length
))
2988 file_lock
.fl_end
= ~(u64
)0;
2990 file_lock
.fl_end
= locku
->lu_offset
+ locku
->lu_length
- 1;
2991 nfs4_transform_lock_offset(&file_lock
);
2994 * Try to unlock the file in the VFS.
2996 status
= posix_lock_file(filp
, &file_lock
);
2997 if (file_lock
.fl_ops
&& file_lock
.fl_ops
->fl_release_private
)
2998 file_lock
.fl_ops
->fl_release_private(&file_lock
);
3000 printk("NFSD: nfs4_locku: posix_lock_file failed!\n");
3004 * OK, unlock succeeded; the only thing left to do is update the stateid.
3006 update_stateid(&stp
->st_stateid
);
3007 memcpy(&locku
->lu_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
3010 if (locku
->lu_stateowner
)
3011 nfs4_get_stateowner(locku
->lu_stateowner
);
3012 nfs4_unlock_state();
3016 status
= nfserrno(status
);
3022 * 1: locks held by lockowner
3023 * 0: no locks held by lockowner
3026 check_for_locks(struct file
*filp
, struct nfs4_stateowner
*lowner
)
3028 struct file_lock
**flpp
;
3029 struct inode
*inode
= filp
->f_dentry
->d_inode
;
3033 for (flpp
= &inode
->i_flock
; *flpp
!= NULL
; flpp
= &(*flpp
)->fl_next
) {
3034 if ((*flpp
)->fl_owner
== (fl_owner_t
)lowner
)
3044 nfsd4_release_lockowner(struct svc_rqst
*rqstp
, struct nfsd4_release_lockowner
*rlockowner
)
3046 clientid_t
*clid
= &rlockowner
->rl_clientid
;
3047 struct nfs4_stateowner
*local
= NULL
;
3048 struct xdr_netobj
*owner
= &rlockowner
->rl_owner
;
3051 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
3052 clid
->cl_boot
, clid
->cl_id
);
3054 /* XXX check for lease expiration */
3056 status
= nfserr_stale_clientid
;
3057 if (STALE_CLIENTID(clid
)) {
3058 printk("NFSD: nfsd4_release_lockowner: clientid is stale!\n");
3065 local
= find_lockstateowner(owner
, clid
);
3067 struct nfs4_stateid
*stp
;
3069 /* check for any locks held by any stateid
3070 * associated with the (lock) stateowner */
3071 status
= nfserr_locks_held
;
3072 list_for_each_entry(stp
, &local
->so_perfilestate
,
3074 if (check_for_locks(stp
->st_vfs_file
, local
))
3077 /* no locks held by (lock) stateowner */
3079 release_stateowner(local
);
3082 nfs4_unlock_state();
3086 static inline struct nfs4_client_reclaim
*
3087 alloc_reclaim(int namelen
)
3089 struct nfs4_client_reclaim
*crp
= NULL
;
3091 crp
= kmalloc(sizeof(struct nfs4_client_reclaim
), GFP_KERNEL
);
3094 crp
->cr_name
.data
= kmalloc(namelen
, GFP_KERNEL
);
3095 if (!crp
->cr_name
.data
) {
3103 * failure => all reset bets are off, nfserr_no_grace...
3106 nfs4_client_to_reclaim(char *name
, int namlen
)
3108 unsigned int strhashval
;
3109 struct nfs4_client_reclaim
*crp
= NULL
;
3111 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", namlen
, name
);
3112 crp
= alloc_reclaim(namlen
);
3115 strhashval
= clientstr_hashval(name
, namlen
);
3116 INIT_LIST_HEAD(&crp
->cr_strhash
);
3117 list_add(&crp
->cr_strhash
, &reclaim_str_hashtbl
[strhashval
]);
3118 memcpy(crp
->cr_name
.data
, name
, namlen
);
3119 crp
->cr_name
.len
= namlen
;
3120 reclaim_str_hashtbl_size
++;
3125 nfs4_release_reclaim(void)
3127 struct nfs4_client_reclaim
*crp
= NULL
;
3130 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
3131 while (!list_empty(&reclaim_str_hashtbl
[i
])) {
3132 crp
= list_entry(reclaim_str_hashtbl
[i
].next
,
3133 struct nfs4_client_reclaim
, cr_strhash
);
3134 list_del(&crp
->cr_strhash
);
3135 kfree(crp
->cr_name
.data
);
3137 reclaim_str_hashtbl_size
--;
3140 BUG_ON(reclaim_str_hashtbl_size
);
3144 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
3145 struct nfs4_client_reclaim
*
3146 nfs4_find_reclaim_client(clientid_t
*clid
)
3148 unsigned int strhashval
;
3149 struct nfs4_client
*clp
;
3150 struct nfs4_client_reclaim
*crp
= NULL
;
3153 /* find clientid in conf_id_hashtbl */
3154 clp
= find_confirmed_client(clid
);
3158 dprintk("NFSD: nfs4_find_reclaim_client for %.*s\n",
3159 clp
->cl_name
.len
, clp
->cl_name
.data
);
3161 /* find clp->cl_name in reclaim_str_hashtbl */
3162 strhashval
= clientstr_hashval(clp
->cl_name
.data
, clp
->cl_name
.len
);
3163 list_for_each_entry(crp
, &reclaim_str_hashtbl
[strhashval
], cr_strhash
) {
3164 if (cmp_name(&crp
->cr_name
, &clp
->cl_name
)) {
3172 * Called from OPEN. Look for clientid in reclaim list.
3175 nfs4_check_open_reclaim(clientid_t
*clid
)
3177 return nfs4_find_reclaim_client(clid
) ? nfs_ok
: nfserr_reclaim_bad
;
3180 /* initialization to perform at module load time: */
3183 nfs4_state_init(void)
3187 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
3188 INIT_LIST_HEAD(&conf_id_hashtbl
[i
]);
3189 INIT_LIST_HEAD(&conf_str_hashtbl
[i
]);
3190 INIT_LIST_HEAD(&unconf_str_hashtbl
[i
]);
3191 INIT_LIST_HEAD(&unconf_id_hashtbl
[i
]);
3193 for (i
= 0; i
< FILE_HASH_SIZE
; i
++) {
3194 INIT_LIST_HEAD(&file_hashtbl
[i
]);
3196 for (i
= 0; i
< OWNER_HASH_SIZE
; i
++) {
3197 INIT_LIST_HEAD(&ownerstr_hashtbl
[i
]);
3198 INIT_LIST_HEAD(&ownerid_hashtbl
[i
]);
3200 for (i
= 0; i
< STATEID_HASH_SIZE
; i
++) {
3201 INIT_LIST_HEAD(&stateid_hashtbl
[i
]);
3202 INIT_LIST_HEAD(&lockstateid_hashtbl
[i
]);
3204 for (i
= 0; i
< LOCK_HASH_SIZE
; i
++) {
3205 INIT_LIST_HEAD(&lock_ownerid_hashtbl
[i
]);
3206 INIT_LIST_HEAD(&lock_ownerstr_hashtbl
[i
]);
3208 memset(&onestateid
, ~0, sizeof(stateid_t
));
3209 INIT_LIST_HEAD(&close_lru
);
3210 INIT_LIST_HEAD(&client_lru
);
3211 INIT_LIST_HEAD(&del_recall_lru
);
3212 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++)
3213 INIT_LIST_HEAD(&reclaim_str_hashtbl
[i
]);
3214 reclaim_str_hashtbl_size
= 0;
3217 /* initialization to perform when the nfsd service is started: */
3220 __nfs4_state_start(void)
3224 boot_time
= get_seconds();
3225 grace_time
= max(user_lease_time
, lease_time
);
3226 lease_time
= user_lease_time
;
3227 printk("NFSD: starting %ld-second grace period\n", grace_time
);
3228 grace_end
= boot_time
+ grace_time
;
3229 laundry_wq
= create_singlethread_workqueue("nfsd4");
3230 queue_delayed_work(laundry_wq
, &laundromat_work
, NFSD_LEASE_TIME
*HZ
);
3234 nfs4_state_start(void)
3240 status
= nfsd4_init_slabs();
3243 __nfs4_state_start();
3251 return get_seconds() < grace_end
;
3257 printk("NFSD: ERROR in reboot recovery. State reclaims will fail.\n");
3258 grace_end
= get_seconds();
3262 nfs4_lease_time(void)
3268 __nfs4_state_shutdown(void)
3271 struct nfs4_client
*clp
= NULL
;
3272 struct nfs4_delegation
*dp
= NULL
;
3273 struct nfs4_stateowner
*sop
= NULL
;
3274 struct list_head
*pos
, *next
, reaplist
;
3276 list_for_each_safe(pos
, next
, &close_lru
) {
3277 sop
= list_entry(pos
, struct nfs4_stateowner
, so_close_lru
);
3278 list_del(&sop
->so_close_lru
);
3279 nfs4_put_stateowner(sop
);
3282 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
3283 while (!list_empty(&conf_id_hashtbl
[i
])) {
3284 clp
= list_entry(conf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
3287 while (!list_empty(&unconf_str_hashtbl
[i
])) {
3288 clp
= list_entry(unconf_str_hashtbl
[i
].next
, struct nfs4_client
, cl_strhash
);
3292 INIT_LIST_HEAD(&reaplist
);
3293 spin_lock(&recall_lock
);
3294 list_for_each_safe(pos
, next
, &del_recall_lru
) {
3295 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3296 list_move(&dp
->dl_recall_lru
, &reaplist
);
3298 spin_unlock(&recall_lock
);
3299 list_for_each_safe(pos
, next
, &reaplist
) {
3300 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3301 list_del_init(&dp
->dl_recall_lru
);
3302 unhash_delegation(dp
);
3305 cancel_delayed_work(&laundromat_work
);
3306 flush_workqueue(laundry_wq
);
3307 destroy_workqueue(laundry_wq
);
3312 nfs4_state_shutdown(void)
3315 nfs4_release_reclaim();
3316 __nfs4_state_shutdown();
3318 nfs4_unlock_state();
3322 * Called when leasetime is changed.
3324 * The only way the protocol gives us to handle on-the-fly lease changes is to
3325 * simulate a reboot. Instead of doing that, we just wait till the next time
3326 * we start to register any changes in lease time. If the administrator
3327 * really wants to change the lease time *now*, they can go ahead and bring
3328 * nfsd down and then back up again after changing the lease time.
3331 nfs4_reset_lease(time_t leasetime
)
3334 user_lease_time
= leasetime
;