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 old_lease_time
= 90; /* past incarnation lease time */
57 static u32 nfs4_reclaim_init
= 0;
59 static time_t grace_end
= 0;
60 static u32 current_clientid
= 1;
61 static u32 current_ownerid
= 1;
62 static u32 current_fileid
= 1;
63 static u32 current_delegid
= 1;
65 stateid_t zerostateid
; /* bits all 0 */
66 stateid_t onestateid
; /* bits all 1 */
68 /* forward declarations */
69 struct nfs4_stateid
* find_stateid(stateid_t
*stid
, int flags
);
70 static struct nfs4_delegation
* find_delegation_stateid(struct inode
*ino
, stateid_t
*stid
);
71 static void release_stateid_lockowners(struct nfs4_stateid
*open_stp
);
76 * protects clientid_hashtbl[], clientstr_hashtbl[],
77 * unconfstr_hashtbl[], uncofid_hashtbl[].
79 static DECLARE_MUTEX(client_sema
);
81 kmem_cache_t
*stateowner_slab
= NULL
;
82 kmem_cache_t
*file_slab
= NULL
;
83 kmem_cache_t
*stateid_slab
= NULL
;
84 kmem_cache_t
*deleg_slab
= NULL
;
93 nfs4_unlock_state(void)
99 opaque_hashval(const void *ptr
, int nbytes
)
101 unsigned char *cptr
= (unsigned char *) ptr
;
111 /* forward declarations */
112 static void release_stateowner(struct nfs4_stateowner
*sop
);
113 static void release_stateid(struct nfs4_stateid
*stp
, int flags
);
114 static void release_file(struct nfs4_file
*fp
);
120 /* recall_lock protects the del_recall_lru */
121 spinlock_t recall_lock
;
122 static struct list_head del_recall_lru
;
124 static struct nfs4_delegation
*
125 alloc_init_deleg(struct nfs4_client
*clp
, struct nfs4_stateid
*stp
, struct svc_fh
*current_fh
, u32 type
)
127 struct nfs4_delegation
*dp
;
128 struct nfs4_file
*fp
= stp
->st_file
;
129 struct nfs4_callback
*cb
= &stp
->st_stateowner
->so_client
->cl_callback
;
131 dprintk("NFSD alloc_init_deleg\n");
132 dp
= kmem_cache_alloc(deleg_slab
, GFP_KERNEL
);
135 INIT_LIST_HEAD(&dp
->dl_del_perfile
);
136 INIT_LIST_HEAD(&dp
->dl_del_perclnt
);
137 INIT_LIST_HEAD(&dp
->dl_recall_lru
);
141 get_file(stp
->st_vfs_file
);
142 dp
->dl_vfs_file
= stp
->st_vfs_file
;
144 dp
->dl_recall
.cbr_dp
= NULL
;
145 dp
->dl_recall
.cbr_ident
= cb
->cb_ident
;
146 dp
->dl_recall
.cbr_trunc
= 0;
147 dp
->dl_stateid
.si_boot
= boot_time
;
148 dp
->dl_stateid
.si_stateownerid
= current_delegid
++;
149 dp
->dl_stateid
.si_fileid
= 0;
150 dp
->dl_stateid
.si_generation
= 0;
151 dp
->dl_fhlen
= current_fh
->fh_handle
.fh_size
;
152 memcpy(dp
->dl_fhval
, ¤t_fh
->fh_handle
.fh_base
,
153 current_fh
->fh_handle
.fh_size
);
155 atomic_set(&dp
->dl_count
, 1);
156 list_add(&dp
->dl_del_perfile
, &fp
->fi_del_perfile
);
157 list_add(&dp
->dl_del_perclnt
, &clp
->cl_del_perclnt
);
162 nfs4_put_delegation(struct nfs4_delegation
*dp
)
164 if (atomic_dec_and_test(&dp
->dl_count
)) {
165 dprintk("NFSD: freeing dp %p\n",dp
);
166 kmem_cache_free(deleg_slab
, dp
);
170 /* Remove the associated file_lock first, then remove the delegation.
171 * lease_modify() is called to remove the FS_LEASE file_lock from
172 * the i_flock list, eventually calling nfsd's lock_manager
173 * fl_release_callback.
176 nfs4_close_delegation(struct nfs4_delegation
*dp
)
178 struct file
*filp
= dp
->dl_vfs_file
;
180 dprintk("NFSD: close_delegation dp %p\n",dp
);
181 dp
->dl_vfs_file
= NULL
;
182 /* The following nfsd_close may not actually close the file,
183 * but we want to remove the lease in any case. */
185 setlease(filp
, F_UNLCK
, &dp
->dl_flock
);
189 /* Called under the state lock. */
191 unhash_delegation(struct nfs4_delegation
*dp
)
193 list_del_init(&dp
->dl_del_perfile
);
194 list_del_init(&dp
->dl_del_perclnt
);
195 spin_lock(&recall_lock
);
196 list_del_init(&dp
->dl_recall_lru
);
197 spin_unlock(&recall_lock
);
198 nfs4_close_delegation(dp
);
199 nfs4_put_delegation(dp
);
206 /* Hash tables for nfs4_clientid state */
207 #define CLIENT_HASH_BITS 4
208 #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS)
209 #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1)
211 #define clientid_hashval(id) \
212 ((id) & CLIENT_HASH_MASK)
213 #define clientstr_hashval(name, namelen) \
214 (opaque_hashval((name), (namelen)) & CLIENT_HASH_MASK)
216 * reclaim_str_hashtbl[] holds known client info from previous reset/reboot
217 * used in reboot/reset lease grace period processing
219 * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed
220 * setclientid_confirmed info.
222 * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed
225 * client_lru holds client queue ordered by nfs4_client.cl_time
228 * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time
229 * for last close replay.
231 static struct list_head reclaim_str_hashtbl
[CLIENT_HASH_SIZE
];
232 static int reclaim_str_hashtbl_size
= 0;
233 static struct list_head conf_id_hashtbl
[CLIENT_HASH_SIZE
];
234 static struct list_head conf_str_hashtbl
[CLIENT_HASH_SIZE
];
235 static struct list_head unconf_str_hashtbl
[CLIENT_HASH_SIZE
];
236 static struct list_head unconf_id_hashtbl
[CLIENT_HASH_SIZE
];
237 static struct list_head client_lru
;
238 static struct list_head close_lru
;
241 renew_client(struct nfs4_client
*clp
)
244 * Move client to the end to the LRU list.
246 dprintk("renewing client (clientid %08x/%08x)\n",
247 clp
->cl_clientid
.cl_boot
,
248 clp
->cl_clientid
.cl_id
);
249 list_move_tail(&clp
->cl_lru
, &client_lru
);
250 clp
->cl_time
= get_seconds();
253 /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
255 STALE_CLIENTID(clientid_t
*clid
)
257 if (clid
->cl_boot
== boot_time
)
259 dprintk("NFSD stale clientid (%08x/%08x)\n",
260 clid
->cl_boot
, clid
->cl_id
);
265 * XXX Should we use a slab cache ?
266 * This type of memory management is somewhat inefficient, but we use it
267 * anyway since SETCLIENTID is not a common operation.
269 static inline struct nfs4_client
*
270 alloc_client(struct xdr_netobj name
)
272 struct nfs4_client
*clp
;
274 if ((clp
= kmalloc(sizeof(struct nfs4_client
), GFP_KERNEL
))!= NULL
) {
275 memset(clp
, 0, sizeof(*clp
));
276 if ((clp
->cl_name
.data
= kmalloc(name
.len
, GFP_KERNEL
)) != NULL
) {
277 memcpy(clp
->cl_name
.data
, name
.data
, name
.len
);
278 clp
->cl_name
.len
= name
.len
;
289 free_client(struct nfs4_client
*clp
)
291 if (clp
->cl_cred
.cr_group_info
)
292 put_group_info(clp
->cl_cred
.cr_group_info
);
293 kfree(clp
->cl_name
.data
);
298 put_nfs4_client(struct nfs4_client
*clp
)
300 if (atomic_dec_and_test(&clp
->cl_count
))
305 expire_client(struct nfs4_client
*clp
)
307 struct nfs4_stateowner
*sop
;
308 struct nfs4_delegation
*dp
;
309 struct nfs4_callback
*cb
= &clp
->cl_callback
;
310 struct rpc_clnt
*clnt
= clp
->cl_callback
.cb_client
;
311 struct list_head reaplist
;
313 dprintk("NFSD: expire_client cl_count %d\n",
314 atomic_read(&clp
->cl_count
));
316 /* shutdown rpc client, ending any outstanding recall rpcs */
317 if (atomic_read(&cb
->cb_set
) == 1 && clnt
) {
318 rpc_shutdown_client(clnt
);
319 clnt
= clp
->cl_callback
.cb_client
= NULL
;
322 INIT_LIST_HEAD(&reaplist
);
323 spin_lock(&recall_lock
);
324 while (!list_empty(&clp
->cl_del_perclnt
)) {
325 dp
= list_entry(clp
->cl_del_perclnt
.next
, struct nfs4_delegation
, dl_del_perclnt
);
326 dprintk("NFSD: expire client. dp %p, fp %p\n", dp
,
328 list_del_init(&dp
->dl_del_perclnt
);
329 list_move(&dp
->dl_recall_lru
, &reaplist
);
331 spin_unlock(&recall_lock
);
332 while (!list_empty(&reaplist
)) {
333 dp
= list_entry(reaplist
.next
, struct nfs4_delegation
, dl_recall_lru
);
334 list_del_init(&dp
->dl_recall_lru
);
335 unhash_delegation(dp
);
337 list_del(&clp
->cl_idhash
);
338 list_del(&clp
->cl_strhash
);
339 list_del(&clp
->cl_lru
);
340 while (!list_empty(&clp
->cl_perclient
)) {
341 sop
= list_entry(clp
->cl_perclient
.next
, struct nfs4_stateowner
, so_perclient
);
342 release_stateowner(sop
);
344 put_nfs4_client(clp
);
347 static struct nfs4_client
*
348 create_client(struct xdr_netobj name
) {
349 struct nfs4_client
*clp
;
351 if (!(clp
= alloc_client(name
)))
353 atomic_set(&clp
->cl_count
, 1);
354 atomic_set(&clp
->cl_callback
.cb_set
, 0);
355 clp
->cl_callback
.cb_parsed
= 0;
356 INIT_LIST_HEAD(&clp
->cl_idhash
);
357 INIT_LIST_HEAD(&clp
->cl_strhash
);
358 INIT_LIST_HEAD(&clp
->cl_perclient
);
359 INIT_LIST_HEAD(&clp
->cl_del_perclnt
);
360 INIT_LIST_HEAD(&clp
->cl_lru
);
366 copy_verf(struct nfs4_client
*target
, nfs4_verifier
*source
) {
367 memcpy(target
->cl_verifier
.data
, source
->data
, sizeof(target
->cl_verifier
.data
));
371 copy_clid(struct nfs4_client
*target
, struct nfs4_client
*source
) {
372 target
->cl_clientid
.cl_boot
= source
->cl_clientid
.cl_boot
;
373 target
->cl_clientid
.cl_id
= source
->cl_clientid
.cl_id
;
377 copy_cred(struct svc_cred
*target
, struct svc_cred
*source
) {
379 target
->cr_uid
= source
->cr_uid
;
380 target
->cr_gid
= source
->cr_gid
;
381 target
->cr_group_info
= source
->cr_group_info
;
382 get_group_info(target
->cr_group_info
);
386 cmp_name(struct xdr_netobj
*n1
, struct xdr_netobj
*n2
) {
389 return((n1
->len
== n2
->len
) && !memcmp(n1
->data
, n2
->data
, n2
->len
));
393 cmp_verf(nfs4_verifier
*v1
, nfs4_verifier
*v2
) {
394 return(!memcmp(v1
->data
,v2
->data
,sizeof(v1
->data
)));
398 cmp_clid(clientid_t
* cl1
, clientid_t
* cl2
) {
399 return((cl1
->cl_boot
== cl2
->cl_boot
) &&
400 (cl1
->cl_id
== cl2
->cl_id
));
403 /* XXX what about NGROUP */
405 cmp_creds(struct svc_cred
*cr1
, struct svc_cred
*cr2
){
406 return(cr1
->cr_uid
== cr2
->cr_uid
);
411 gen_clid(struct nfs4_client
*clp
) {
412 clp
->cl_clientid
.cl_boot
= boot_time
;
413 clp
->cl_clientid
.cl_id
= current_clientid
++;
417 gen_confirm(struct nfs4_client
*clp
) {
422 p
= (u32
*)clp
->cl_confirm
.data
;
428 check_name(struct xdr_netobj name
) {
432 if (name
.len
> NFS4_OPAQUE_LIMIT
) {
433 printk("NFSD: check_name: name too long(%d)!\n", name
.len
);
440 add_to_unconfirmed(struct nfs4_client
*clp
, unsigned int strhashval
)
442 unsigned int idhashval
;
444 list_add(&clp
->cl_strhash
, &unconf_str_hashtbl
[strhashval
]);
445 idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
446 list_add(&clp
->cl_idhash
, &unconf_id_hashtbl
[idhashval
]);
447 list_add_tail(&clp
->cl_lru
, &client_lru
);
448 clp
->cl_time
= get_seconds();
452 move_to_confirmed(struct nfs4_client
*clp
)
454 unsigned int idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
455 unsigned int strhashval
;
457 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp
);
458 list_del_init(&clp
->cl_strhash
);
459 list_del_init(&clp
->cl_idhash
);
460 list_add(&clp
->cl_idhash
, &conf_id_hashtbl
[idhashval
]);
461 strhashval
= clientstr_hashval(clp
->cl_name
.data
,
463 list_add(&clp
->cl_strhash
, &conf_str_hashtbl
[strhashval
]);
467 static struct nfs4_client
*
468 find_confirmed_client(clientid_t
*clid
)
470 struct nfs4_client
*clp
;
471 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
473 list_for_each_entry(clp
, &conf_id_hashtbl
[idhashval
], cl_idhash
) {
474 if (cmp_clid(&clp
->cl_clientid
, clid
))
480 static struct nfs4_client
*
481 find_unconfirmed_client(clientid_t
*clid
)
483 struct nfs4_client
*clp
;
484 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
486 list_for_each_entry(clp
, &unconf_id_hashtbl
[idhashval
], cl_idhash
) {
487 if (cmp_clid(&clp
->cl_clientid
, clid
))
493 /* a helper function for parse_callback */
495 parse_octet(unsigned int *lenp
, char **addrp
)
497 unsigned int len
= *lenp
;
509 if ((c
< '0') || (c
> '9')) {
515 n
= (n
* 10) + (c
- '0');
526 /* parse and set the setclientid ipv4 callback address */
528 parse_ipv4(unsigned int addr_len
, char *addr_val
, unsigned int *cbaddrp
, unsigned short *cbportp
)
533 u32 addrlen
= addr_len
;
534 char *addr
= addr_val
;
539 for(i
= 4; i
> 0 ; i
--) {
540 if ((temp
= parse_octet(&addrlen
, &addr
)) < 0) {
543 cbaddr
|= (temp
<< shift
);
551 for(i
= 2; i
> 0 ; i
--) {
552 if ((temp
= parse_octet(&addrlen
, &addr
)) < 0) {
555 cbport
|= (temp
<< shift
);
564 gen_callback(struct nfs4_client
*clp
, struct nfsd4_setclientid
*se
)
566 struct nfs4_callback
*cb
= &clp
->cl_callback
;
568 /* Currently, we only support tcp for the callback channel */
569 if ((se
->se_callback_netid_len
!= 3) || memcmp((char *)se
->se_callback_netid_val
, "tcp", 3))
572 if ( !(parse_ipv4(se
->se_callback_addr_len
, se
->se_callback_addr_val
,
573 &cb
->cb_addr
, &cb
->cb_port
)))
575 cb
->cb_prog
= se
->se_callback_prog
;
576 cb
->cb_ident
= se
->se_callback_ident
;
580 printk(KERN_INFO
"NFSD: this client (clientid %08x/%08x) "
581 "will not receive delegations\n",
582 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
589 * RFC 3010 has a complex implmentation description of processing a
590 * SETCLIENTID request consisting of 5 bullets, labeled as
591 * CASE0 - CASE4 below.
594 * callback information will be processed in a future patch
596 * an unconfirmed record is added when:
597 * NORMAL (part of CASE 4): there is no confirmed nor unconfirmed record.
598 * CASE 1: confirmed record found with matching name, principal,
599 * verifier, and clientid.
600 * CASE 2: confirmed record found with matching name, principal,
601 * and there is no unconfirmed record with matching
604 * an unconfirmed record is replaced when:
605 * CASE 3: confirmed record found with matching name, principal,
606 * and an unconfirmed record is found with matching
607 * name, principal, and with clientid and
608 * confirm that does not match the confirmed record.
609 * CASE 4: there is no confirmed record with matching name and
610 * principal. there is an unconfirmed record with
611 * matching name, principal.
613 * an unconfirmed record is deleted when:
614 * CASE 1: an unconfirmed record that matches input name, verifier,
615 * and confirmed clientid.
616 * CASE 4: any unconfirmed records with matching name and principal
617 * that exist after an unconfirmed record has been replaced
618 * as described above.
622 nfsd4_setclientid(struct svc_rqst
*rqstp
, struct nfsd4_setclientid
*setclid
)
624 u32 ip_addr
= rqstp
->rq_addr
.sin_addr
.s_addr
;
625 struct xdr_netobj clname
= {
626 .len
= setclid
->se_namelen
,
627 .data
= setclid
->se_name
,
629 nfs4_verifier clverifier
= setclid
->se_verf
;
630 unsigned int strhashval
;
631 struct nfs4_client
* conf
, * unconf
, * new, * clp
;
634 status
= nfserr_inval
;
635 if (!check_name(clname
))
639 * XXX The Duplicate Request Cache (DRC) has been checked (??)
640 * We get here on a DRC miss.
643 strhashval
= clientstr_hashval(clname
.data
, clname
.len
);
647 list_for_each_entry(clp
, &conf_str_hashtbl
[strhashval
], cl_strhash
) {
648 if (!cmp_name(&clp
->cl_name
, &clname
))
652 * clname match, confirmed, different principal
653 * or different ip_address
655 status
= nfserr_clid_inuse
;
656 if (!cmp_creds(&clp
->cl_cred
,&rqstp
->rq_cred
)) {
657 printk("NFSD: setclientid: string in use by client"
658 "(clientid %08x/%08x)\n",
659 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
662 if (clp
->cl_addr
!= ip_addr
) {
663 printk("NFSD: setclientid: string in use by client"
664 "(clientid %08x/%08x)\n",
665 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
670 * cl_name match from a previous SETCLIENTID operation
671 * XXX check for additional matches?
677 list_for_each_entry(clp
, &unconf_str_hashtbl
[strhashval
], cl_strhash
) {
678 if (!cmp_name(&clp
->cl_name
, &clname
))
680 /* cl_name match from a previous SETCLIENTID operation */
684 status
= nfserr_resource
;
688 * placed first, because it is the normal case.
691 expire_client(unconf
);
692 if (!(new = create_client(clname
)))
694 copy_verf(new, &clverifier
);
695 new->cl_addr
= ip_addr
;
696 copy_cred(&new->cl_cred
,&rqstp
->rq_cred
);
699 gen_callback(new, setclid
);
700 add_to_unconfirmed(new, strhashval
);
701 } else if (cmp_verf(&conf
->cl_verifier
, &clverifier
)) {
704 * cl_name match, confirmed, principal match
705 * verifier match: probable callback update
707 * remove any unconfirmed nfs4_client with
708 * matching cl_name, cl_verifier, and cl_clientid
710 * create and insert an unconfirmed nfs4_client with same
711 * cl_name, cl_verifier, and cl_clientid as existing
712 * nfs4_client, but with the new callback info and a
716 cmp_verf(&unconf
->cl_verifier
, &conf
->cl_verifier
) &&
717 cmp_clid(&unconf
->cl_clientid
, &conf
->cl_clientid
)) {
718 expire_client(unconf
);
720 if (!(new = create_client(clname
)))
722 copy_verf(new,&conf
->cl_verifier
);
723 new->cl_addr
= ip_addr
;
724 copy_cred(&new->cl_cred
,&rqstp
->rq_cred
);
725 copy_clid(new, conf
);
727 gen_callback(new, setclid
);
728 add_to_unconfirmed(new,strhashval
);
729 } else if (!unconf
) {
732 * clname match, confirmed, principal match
733 * verfier does not match
734 * no unconfirmed. create a new unconfirmed nfs4_client
735 * using input clverifier, clname, and callback info
736 * and generate a new cl_clientid and cl_confirm.
738 if (!(new = create_client(clname
)))
740 copy_verf(new,&clverifier
);
741 new->cl_addr
= ip_addr
;
742 copy_cred(&new->cl_cred
,&rqstp
->rq_cred
);
745 gen_callback(new, setclid
);
746 add_to_unconfirmed(new, strhashval
);
747 } else if (!cmp_verf(&conf
->cl_confirm
, &unconf
->cl_confirm
)) {
750 * confirmed found (name, principal match)
751 * confirmed verifier does not match input clverifier
753 * unconfirmed found (name match)
754 * confirmed->cl_confirm != unconfirmed->cl_confirm
756 * remove unconfirmed.
758 * create an unconfirmed nfs4_client
759 * with same cl_name as existing confirmed nfs4_client,
760 * but with new callback info, new cl_clientid,
761 * new cl_verifier and a new cl_confirm
763 expire_client(unconf
);
764 if (!(new = create_client(clname
)))
766 copy_verf(new,&clverifier
);
767 new->cl_addr
= ip_addr
;
768 copy_cred(&new->cl_cred
,&rqstp
->rq_cred
);
771 gen_callback(new, setclid
);
772 add_to_unconfirmed(new, strhashval
);
774 /* No cases hit !!! */
775 status
= nfserr_inval
;
779 setclid
->se_clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
780 setclid
->se_clientid
.cl_id
= new->cl_clientid
.cl_id
;
781 memcpy(setclid
->se_confirm
.data
, new->cl_confirm
.data
, sizeof(setclid
->se_confirm
.data
));
790 * RFC 3010 has a complex implmentation description of processing a
791 * SETCLIENTID_CONFIRM request consisting of 4 bullets describing
792 * processing on a DRC miss, labeled as CASE1 - CASE4 below.
794 * NOTE: callback information will be processed here in a future patch
797 nfsd4_setclientid_confirm(struct svc_rqst
*rqstp
, struct nfsd4_setclientid_confirm
*setclientid_confirm
)
799 u32 ip_addr
= rqstp
->rq_addr
.sin_addr
.s_addr
;
800 struct nfs4_client
*clp
, *conf
= NULL
, *unconf
= NULL
;
801 nfs4_verifier confirm
= setclientid_confirm
->sc_confirm
;
802 clientid_t
* clid
= &setclientid_confirm
->sc_clientid
;
805 if (STALE_CLIENTID(clid
))
806 return nfserr_stale_clientid
;
808 * XXX The Duplicate Request Cache (DRC) has been checked (??)
809 * We get here on a DRC miss.
813 clp
= find_confirmed_client(clid
);
815 status
= nfserr_inval
;
817 * Found a record for this clientid. If the IP addresses
818 * don't match, return ERR_INVAL just as if the record had
821 if (clp
->cl_addr
!= ip_addr
) {
822 printk("NFSD: setclientid: string in use by client"
823 "(clientid %08x/%08x)\n",
824 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
829 clp
= find_unconfirmed_client(clid
);
831 status
= nfserr_inval
;
832 if (clp
->cl_addr
!= ip_addr
) {
833 printk("NFSD: setclientid: string in use by client"
834 "(clientid %08x/%08x)\n",
835 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
841 * unconf record that matches input clientid and input confirm.
842 * conf record that matches input clientid.
843 * conf and unconf records match names, verifiers
845 if ((conf
&& unconf
) &&
846 (cmp_verf(&unconf
->cl_confirm
, &confirm
)) &&
847 (cmp_verf(&conf
->cl_verifier
, &unconf
->cl_verifier
)) &&
848 (cmp_name(&conf
->cl_name
,&unconf
->cl_name
)) &&
849 (!cmp_verf(&conf
->cl_confirm
, &unconf
->cl_confirm
))) {
850 if (!cmp_creds(&conf
->cl_cred
, &unconf
->cl_cred
))
851 status
= nfserr_clid_inuse
;
855 move_to_confirmed(unconf
);
861 * conf record that matches input clientid.
862 * if unconf record that matches input clientid, then unconf->cl_name
863 * or unconf->cl_verifier don't match the conf record.
865 if ((conf
&& !unconf
) ||
867 (!cmp_verf(&conf
->cl_verifier
, &unconf
->cl_verifier
) ||
868 !cmp_name(&conf
->cl_name
, &unconf
->cl_name
)))) {
869 if (!cmp_creds(&conf
->cl_cred
,&rqstp
->rq_cred
)) {
870 status
= nfserr_clid_inuse
;
878 * conf record not found.
879 * unconf record found.
880 * unconf->cl_confirm matches input confirm
882 if (!conf
&& unconf
&& cmp_verf(&unconf
->cl_confirm
, &confirm
)) {
883 if (!cmp_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
)) {
884 status
= nfserr_clid_inuse
;
888 move_to_confirmed(unconf
);
893 * conf record not found, or if conf, then conf->cl_confirm does not
894 * match input confirm.
895 * unconf record not found, or if unconf, then unconf->cl_confirm
896 * does not match input confirm.
898 if ((!conf
|| (conf
&& !cmp_verf(&conf
->cl_confirm
, &confirm
))) &&
899 (!unconf
|| (unconf
&& !cmp_verf(&unconf
->cl_confirm
, &confirm
)))) {
900 status
= nfserr_stale_clientid
;
903 /* check that we have hit one of the cases...*/
904 status
= nfserr_inval
;
908 nfsd4_probe_callback(clp
);
914 * Open owner state (share locks)
917 /* hash tables for nfs4_stateowner */
918 #define OWNER_HASH_BITS 8
919 #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
920 #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
922 #define ownerid_hashval(id) \
923 ((id) & OWNER_HASH_MASK)
924 #define ownerstr_hashval(clientid, ownername) \
925 (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK)
927 static struct list_head ownerid_hashtbl
[OWNER_HASH_SIZE
];
928 static struct list_head ownerstr_hashtbl
[OWNER_HASH_SIZE
];
930 /* hash table for nfs4_file */
931 #define FILE_HASH_BITS 8
932 #define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
933 #define FILE_HASH_MASK (FILE_HASH_SIZE - 1)
934 /* hash table for (open)nfs4_stateid */
935 #define STATEID_HASH_BITS 10
936 #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS)
937 #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1)
939 #define file_hashval(x) \
940 hash_ptr(x, FILE_HASH_BITS)
941 #define stateid_hashval(owner_id, file_id) \
942 (((owner_id) + (file_id)) & STATEID_HASH_MASK)
944 static struct list_head file_hashtbl
[FILE_HASH_SIZE
];
945 static struct list_head stateid_hashtbl
[STATEID_HASH_SIZE
];
947 /* OPEN Share state helper functions */
948 static inline struct nfs4_file
*
949 alloc_init_file(struct inode
*ino
)
951 struct nfs4_file
*fp
;
952 unsigned int hashval
= file_hashval(ino
);
954 fp
= kmem_cache_alloc(file_slab
, GFP_KERNEL
);
956 INIT_LIST_HEAD(&fp
->fi_hash
);
957 INIT_LIST_HEAD(&fp
->fi_perfile
);
958 INIT_LIST_HEAD(&fp
->fi_del_perfile
);
959 list_add(&fp
->fi_hash
, &file_hashtbl
[hashval
]);
960 fp
->fi_inode
= igrab(ino
);
961 fp
->fi_id
= current_fileid
++;
968 release_all_files(void)
971 struct nfs4_file
*fp
;
973 for (i
=0;i
<FILE_HASH_SIZE
;i
++) {
974 while (!list_empty(&file_hashtbl
[i
])) {
975 fp
= list_entry(file_hashtbl
[i
].next
, struct nfs4_file
, fi_hash
);
976 /* this should never be more than once... */
977 if (!list_empty(&fp
->fi_perfile
) || !list_empty(&fp
->fi_del_perfile
)) {
978 printk("ERROR: release_all_files: file %p is open, creating dangling state !!!\n",fp
);
986 nfsd4_free_slab(kmem_cache_t
**slab
)
992 status
= kmem_cache_destroy(*slab
);
998 nfsd4_free_slabs(void)
1000 nfsd4_free_slab(&stateowner_slab
);
1001 nfsd4_free_slab(&file_slab
);
1002 nfsd4_free_slab(&stateid_slab
);
1003 nfsd4_free_slab(&deleg_slab
);
1007 nfsd4_init_slabs(void)
1009 stateowner_slab
= kmem_cache_create("nfsd4_stateowners",
1010 sizeof(struct nfs4_stateowner
), 0, 0, NULL
, NULL
);
1011 if (stateowner_slab
== NULL
)
1013 file_slab
= kmem_cache_create("nfsd4_files",
1014 sizeof(struct nfs4_file
), 0, 0, NULL
, NULL
);
1015 if (file_slab
== NULL
)
1017 stateid_slab
= kmem_cache_create("nfsd4_stateids",
1018 sizeof(struct nfs4_stateid
), 0, 0, NULL
, NULL
);
1019 if (stateid_slab
== NULL
)
1021 deleg_slab
= kmem_cache_create("nfsd4_delegations",
1022 sizeof(struct nfs4_delegation
), 0, 0, NULL
, NULL
);
1023 if (deleg_slab
== NULL
)
1028 dprintk("nfsd4: out of memory while initializing nfsv4\n");
1033 nfs4_free_stateowner(struct kref
*kref
)
1035 struct nfs4_stateowner
*sop
=
1036 container_of(kref
, struct nfs4_stateowner
, so_ref
);
1037 kfree(sop
->so_owner
.data
);
1038 kmem_cache_free(stateowner_slab
, sop
);
1041 static inline struct nfs4_stateowner
*
1042 alloc_stateowner(struct xdr_netobj
*owner
)
1044 struct nfs4_stateowner
*sop
;
1046 if ((sop
= kmem_cache_alloc(stateowner_slab
, GFP_KERNEL
))) {
1047 if ((sop
->so_owner
.data
= kmalloc(owner
->len
, GFP_KERNEL
))) {
1048 memcpy(sop
->so_owner
.data
, owner
->data
, owner
->len
);
1049 sop
->so_owner
.len
= owner
->len
;
1050 kref_init(&sop
->so_ref
);
1053 kmem_cache_free(stateowner_slab
, sop
);
1058 static struct nfs4_stateowner
*
1059 alloc_init_open_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfsd4_open
*open
) {
1060 struct nfs4_stateowner
*sop
;
1061 struct nfs4_replay
*rp
;
1062 unsigned int idhashval
;
1064 if (!(sop
= alloc_stateowner(&open
->op_owner
)))
1066 idhashval
= ownerid_hashval(current_ownerid
);
1067 INIT_LIST_HEAD(&sop
->so_idhash
);
1068 INIT_LIST_HEAD(&sop
->so_strhash
);
1069 INIT_LIST_HEAD(&sop
->so_perclient
);
1070 INIT_LIST_HEAD(&sop
->so_perfilestate
);
1071 INIT_LIST_HEAD(&sop
->so_perlockowner
); /* not used */
1072 INIT_LIST_HEAD(&sop
->so_close_lru
);
1074 list_add(&sop
->so_idhash
, &ownerid_hashtbl
[idhashval
]);
1075 list_add(&sop
->so_strhash
, &ownerstr_hashtbl
[strhashval
]);
1076 list_add(&sop
->so_perclient
, &clp
->cl_perclient
);
1077 sop
->so_is_open_owner
= 1;
1078 sop
->so_id
= current_ownerid
++;
1079 sop
->so_client
= clp
;
1080 sop
->so_seqid
= open
->op_seqid
;
1081 sop
->so_confirmed
= 0;
1082 rp
= &sop
->so_replay
;
1083 rp
->rp_status
= NFSERR_SERVERFAULT
;
1085 rp
->rp_buf
= rp
->rp_ibuf
;
1090 release_stateid_lockowners(struct nfs4_stateid
*open_stp
)
1092 struct nfs4_stateowner
*lock_sop
;
1094 while (!list_empty(&open_stp
->st_perlockowner
)) {
1095 lock_sop
= list_entry(open_stp
->st_perlockowner
.next
,
1096 struct nfs4_stateowner
, so_perlockowner
);
1097 /* list_del(&open_stp->st_perlockowner); */
1098 BUG_ON(lock_sop
->so_is_open_owner
);
1099 release_stateowner(lock_sop
);
1104 unhash_stateowner(struct nfs4_stateowner
*sop
)
1106 struct nfs4_stateid
*stp
;
1108 list_del(&sop
->so_idhash
);
1109 list_del(&sop
->so_strhash
);
1110 if (sop
->so_is_open_owner
)
1111 list_del(&sop
->so_perclient
);
1112 list_del(&sop
->so_perlockowner
);
1113 while (!list_empty(&sop
->so_perfilestate
)) {
1114 stp
= list_entry(sop
->so_perfilestate
.next
,
1115 struct nfs4_stateid
, st_perfilestate
);
1116 if (sop
->so_is_open_owner
)
1117 release_stateid(stp
, OPEN_STATE
);
1119 release_stateid(stp
, LOCK_STATE
);
1124 release_stateowner(struct nfs4_stateowner
*sop
)
1126 unhash_stateowner(sop
);
1127 list_del(&sop
->so_close_lru
);
1128 nfs4_put_stateowner(sop
);
1132 init_stateid(struct nfs4_stateid
*stp
, struct nfs4_file
*fp
, struct nfsd4_open
*open
) {
1133 struct nfs4_stateowner
*sop
= open
->op_stateowner
;
1134 unsigned int hashval
= stateid_hashval(sop
->so_id
, fp
->fi_id
);
1136 INIT_LIST_HEAD(&stp
->st_hash
);
1137 INIT_LIST_HEAD(&stp
->st_perfilestate
);
1138 INIT_LIST_HEAD(&stp
->st_perlockowner
);
1139 INIT_LIST_HEAD(&stp
->st_perfile
);
1140 list_add(&stp
->st_hash
, &stateid_hashtbl
[hashval
]);
1141 list_add(&stp
->st_perfilestate
, &sop
->so_perfilestate
);
1142 list_add(&stp
->st_perfile
, &fp
->fi_perfile
);
1143 stp
->st_stateowner
= sop
;
1145 stp
->st_stateid
.si_boot
= boot_time
;
1146 stp
->st_stateid
.si_stateownerid
= sop
->so_id
;
1147 stp
->st_stateid
.si_fileid
= fp
->fi_id
;
1148 stp
->st_stateid
.si_generation
= 0;
1149 stp
->st_access_bmap
= 0;
1150 stp
->st_deny_bmap
= 0;
1151 __set_bit(open
->op_share_access
, &stp
->st_access_bmap
);
1152 __set_bit(open
->op_share_deny
, &stp
->st_deny_bmap
);
1156 release_stateid(struct nfs4_stateid
*stp
, int flags
)
1158 struct file
*filp
= stp
->st_vfs_file
;
1160 list_del(&stp
->st_hash
);
1161 list_del(&stp
->st_perfile
);
1162 list_del(&stp
->st_perfilestate
);
1163 if (flags
& OPEN_STATE
) {
1164 release_stateid_lockowners(stp
);
1165 stp
->st_vfs_file
= NULL
;
1167 } else if (flags
& LOCK_STATE
)
1168 locks_remove_posix(filp
, (fl_owner_t
) stp
->st_stateowner
);
1169 kmem_cache_free(stateid_slab
, stp
);
1174 release_file(struct nfs4_file
*fp
)
1176 list_del(&fp
->fi_hash
);
1178 kmem_cache_free(file_slab
, fp
);
1182 move_to_close_lru(struct nfs4_stateowner
*sop
)
1184 dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop
);
1186 unhash_stateowner(sop
);
1187 list_add_tail(&sop
->so_close_lru
, &close_lru
);
1188 sop
->so_time
= get_seconds();
1192 release_state_owner(struct nfs4_stateid
*stp
, int flag
)
1194 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
1195 struct nfs4_file
*fp
= stp
->st_file
;
1197 dprintk("NFSD: release_state_owner\n");
1198 release_stateid(stp
, flag
);
1200 /* place unused nfs4_stateowners on so_close_lru list to be
1201 * released by the laundromat service after the lease period
1202 * to enable us to handle CLOSE replay
1204 if (sop
->so_confirmed
&& list_empty(&sop
->so_perfilestate
))
1205 move_to_close_lru(sop
);
1206 /* unused nfs4_file's are releseed. XXX slab cache? */
1207 if (list_empty(&fp
->fi_perfile
) && list_empty(&fp
->fi_del_perfile
)) {
1213 cmp_owner_str(struct nfs4_stateowner
*sop
, struct xdr_netobj
*owner
, clientid_t
*clid
) {
1214 return ((sop
->so_owner
.len
== owner
->len
) &&
1215 !memcmp(sop
->so_owner
.data
, owner
->data
, owner
->len
) &&
1216 (sop
->so_client
->cl_clientid
.cl_id
== clid
->cl_id
));
1219 static struct nfs4_stateowner
*
1220 find_openstateowner_str(unsigned int hashval
, struct nfsd4_open
*open
)
1222 struct nfs4_stateowner
*so
= NULL
;
1224 list_for_each_entry(so
, &ownerstr_hashtbl
[hashval
], so_strhash
) {
1225 if (cmp_owner_str(so
, &open
->op_owner
, &open
->op_clientid
))
1231 /* search file_hashtbl[] for file */
1232 static struct nfs4_file
*
1233 find_file(struct inode
*ino
)
1235 unsigned int hashval
= file_hashval(ino
);
1236 struct nfs4_file
*fp
;
1238 list_for_each_entry(fp
, &file_hashtbl
[hashval
], fi_hash
) {
1239 if (fp
->fi_inode
== ino
)
1245 #define TEST_ACCESS(x) ((x > 0 || x < 4)?1:0)
1246 #define TEST_DENY(x) ((x >= 0 || x < 5)?1:0)
1249 set_access(unsigned int *access
, unsigned long bmap
) {
1253 for (i
= 1; i
< 4; i
++) {
1254 if (test_bit(i
, &bmap
))
1260 set_deny(unsigned int *deny
, unsigned long bmap
) {
1264 for (i
= 0; i
< 4; i
++) {
1265 if (test_bit(i
, &bmap
))
1271 test_share(struct nfs4_stateid
*stp
, struct nfsd4_open
*open
) {
1272 unsigned int access
, deny
;
1274 set_access(&access
, stp
->st_access_bmap
);
1275 set_deny(&deny
, stp
->st_deny_bmap
);
1276 if ((access
& open
->op_share_deny
) || (deny
& open
->op_share_access
))
1282 * Called to check deny when READ with all zero stateid or
1283 * WRITE with all zero or all one stateid
1286 nfs4_share_conflict(struct svc_fh
*current_fh
, unsigned int deny_type
)
1288 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
1289 struct nfs4_file
*fp
;
1290 struct nfs4_stateid
*stp
;
1292 dprintk("NFSD: nfs4_share_conflict\n");
1294 fp
= find_file(ino
);
1296 /* Search for conflicting share reservations */
1297 list_for_each_entry(stp
, &fp
->fi_perfile
, st_perfile
) {
1298 if (test_bit(deny_type
, &stp
->st_deny_bmap
) ||
1299 test_bit(NFS4_SHARE_DENY_BOTH
, &stp
->st_deny_bmap
))
1300 return nfserr_share_denied
;
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_del_perfile
, 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_perfile
, 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 if (open
->op_claim_type
!= NFS4_OPEN_CLAIM_NULL
1712 || !atomic_read(&cb
->cb_set
) || !sop
->so_confirmed
)
1715 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
1716 flag
= NFS4_OPEN_DELEGATE_WRITE
;
1718 flag
= NFS4_OPEN_DELEGATE_READ
;
1720 dp
= alloc_init_deleg(sop
->so_client
, stp
, fh
, flag
);
1722 flag
= NFS4_OPEN_DELEGATE_NONE
;
1725 locks_init_lock(&fl
);
1726 fl
.fl_lmops
= &nfsd_lease_mng_ops
;
1727 fl
.fl_flags
= FL_LEASE
;
1728 fl
.fl_end
= OFFSET_MAX
;
1729 fl
.fl_owner
= (fl_owner_t
)dp
;
1730 fl
.fl_file
= stp
->st_vfs_file
;
1731 fl
.fl_pid
= current
->tgid
;
1733 /* setlease checks to see if delegation should be handed out.
1734 * the lock_manager callbacks fl_mylease and fl_change are used
1736 if ((status
= setlease(stp
->st_vfs_file
,
1737 flag
== NFS4_OPEN_DELEGATE_READ
? F_RDLCK
: F_WRLCK
, &flp
))) {
1738 dprintk("NFSD: setlease failed [%d], no delegation\n", status
);
1739 unhash_delegation(dp
);
1740 flag
= NFS4_OPEN_DELEGATE_NONE
;
1744 memcpy(&open
->op_delegate_stateid
, &dp
->dl_stateid
, sizeof(dp
->dl_stateid
));
1746 dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n",
1747 dp
->dl_stateid
.si_boot
,
1748 dp
->dl_stateid
.si_stateownerid
,
1749 dp
->dl_stateid
.si_fileid
,
1750 dp
->dl_stateid
.si_generation
);
1752 open
->op_delegate_type
= flag
;
1756 * called with nfs4_lock_state() held.
1759 nfsd4_process_open2(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
1761 struct nfs4_file
*fp
= NULL
;
1762 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
1763 struct nfs4_stateid
*stp
= NULL
;
1764 struct nfs4_delegation
*dp
= NULL
;
1767 status
= nfserr_inval
;
1768 if (!TEST_ACCESS(open
->op_share_access
) || !TEST_DENY(open
->op_share_deny
))
1771 * Lookup file; if found, lookup stateid and check open request,
1772 * and check for delegations in the process of being recalled.
1773 * If not found, create the nfs4_file struct
1775 fp
= find_file(ino
);
1777 if ((status
= nfs4_check_open(fp
, open
, &stp
)))
1779 status
= nfs4_check_deleg(fp
, open
, &dp
);
1783 status
= nfserr_bad_stateid
;
1784 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
)
1786 status
= nfserr_resource
;
1787 fp
= alloc_init_file(ino
);
1793 * OPEN the file, or upgrade an existing OPEN.
1794 * If truncate fails, the OPEN fails.
1797 /* Stateid was found, this is an OPEN upgrade */
1798 status
= nfs4_upgrade_open(rqstp
, current_fh
, stp
, open
);
1802 /* Stateid was not found, this is a new OPEN */
1804 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
1808 status
= nfs4_new_open(rqstp
, &stp
, dp
, current_fh
, flags
);
1811 init_stateid(stp
, fp
, open
);
1812 status
= nfsd4_truncate(rqstp
, current_fh
, open
);
1814 release_stateid(stp
, OPEN_STATE
);
1818 memcpy(&open
->op_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
1821 * Attempt to hand out a delegation. No error return, because the
1822 * OPEN succeeds even if we fail.
1824 nfs4_open_delegation(current_fh
, open
, stp
);
1828 dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n",
1829 stp
->st_stateid
.si_boot
, stp
->st_stateid
.si_stateownerid
,
1830 stp
->st_stateid
.si_fileid
, stp
->st_stateid
.si_generation
);
1832 /* take the opportunity to clean up unused state */
1833 if (fp
&& list_empty(&fp
->fi_perfile
) && list_empty(&fp
->fi_del_perfile
))
1836 /* CLAIM_PREVIOUS has different error returns */
1837 nfs4_set_claim_prev(open
, &status
);
1839 * To finish the open response, we just need to set the rflags.
1841 open
->op_rflags
= NFS4_OPEN_RESULT_LOCKTYPE_POSIX
;
1842 if (!open
->op_stateowner
->so_confirmed
)
1843 open
->op_rflags
|= NFS4_OPEN_RESULT_CONFIRM
;
1848 static struct work_struct laundromat_work
;
1849 static void laundromat_main(void *);
1850 static DECLARE_WORK(laundromat_work
, laundromat_main
, NULL
);
1853 nfsd4_renew(clientid_t
*clid
)
1855 struct nfs4_client
*clp
;
1859 dprintk("process_renew(%08x/%08x): starting\n",
1860 clid
->cl_boot
, clid
->cl_id
);
1861 status
= nfserr_stale_clientid
;
1862 if (STALE_CLIENTID(clid
))
1864 clp
= find_confirmed_client(clid
);
1865 status
= nfserr_expired
;
1867 /* We assume the client took too long to RENEW. */
1868 dprintk("nfsd4_renew: clientid not found!\n");
1872 status
= nfserr_cb_path_down
;
1873 if (!list_empty(&clp
->cl_del_perclnt
)
1874 && !atomic_read(&clp
->cl_callback
.cb_set
))
1878 nfs4_unlock_state();
1883 nfs4_laundromat(void)
1885 struct nfs4_client
*clp
;
1886 struct nfs4_stateowner
*sop
;
1887 struct nfs4_delegation
*dp
;
1888 struct list_head
*pos
, *next
, reaplist
;
1889 time_t cutoff
= get_seconds() - NFSD_LEASE_TIME
;
1890 time_t t
, clientid_val
= NFSD_LEASE_TIME
;
1891 time_t u
, test_val
= NFSD_LEASE_TIME
;
1895 dprintk("NFSD: laundromat service - starting\n");
1896 list_for_each_safe(pos
, next
, &client_lru
) {
1897 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
1898 if (time_after((unsigned long)clp
->cl_time
, (unsigned long)cutoff
)) {
1899 t
= clp
->cl_time
- cutoff
;
1900 if (clientid_val
> t
)
1904 dprintk("NFSD: purging unused client (clientid %08x)\n",
1905 clp
->cl_clientid
.cl_id
);
1908 INIT_LIST_HEAD(&reaplist
);
1909 spin_lock(&recall_lock
);
1910 list_for_each_safe(pos
, next
, &del_recall_lru
) {
1911 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
1912 if (time_after((unsigned long)dp
->dl_time
, (unsigned long)cutoff
)) {
1913 u
= dp
->dl_time
- cutoff
;
1918 dprintk("NFSD: purging unused delegation dp %p, fp %p\n",
1920 list_move(&dp
->dl_recall_lru
, &reaplist
);
1922 spin_unlock(&recall_lock
);
1923 list_for_each_safe(pos
, next
, &reaplist
) {
1924 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
1925 list_del_init(&dp
->dl_recall_lru
);
1926 unhash_delegation(dp
);
1928 test_val
= NFSD_LEASE_TIME
;
1929 list_for_each_safe(pos
, next
, &close_lru
) {
1930 sop
= list_entry(pos
, struct nfs4_stateowner
, so_close_lru
);
1931 if (time_after((unsigned long)sop
->so_time
, (unsigned long)cutoff
)) {
1932 u
= sop
->so_time
- cutoff
;
1937 dprintk("NFSD: purging unused open stateowner (so_id %d)\n",
1939 list_del(&sop
->so_close_lru
);
1940 nfs4_put_stateowner(sop
);
1942 if (clientid_val
< NFSD_LAUNDROMAT_MINTIMEOUT
)
1943 clientid_val
= NFSD_LAUNDROMAT_MINTIMEOUT
;
1944 nfs4_unlock_state();
1945 return clientid_val
;
1949 laundromat_main(void *not_used
)
1953 t
= nfs4_laundromat();
1954 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t
);
1955 schedule_delayed_work(&laundromat_work
, t
*HZ
);
1958 /* search ownerid_hashtbl[] and close_lru for stateid owner
1959 * (stateid->si_stateownerid)
1961 struct nfs4_stateowner
*
1962 find_openstateowner_id(u32 st_id
, int flags
) {
1963 struct nfs4_stateowner
*local
= NULL
;
1965 dprintk("NFSD: find_openstateowner_id %d\n", st_id
);
1966 if (flags
& CLOSE_STATE
) {
1967 list_for_each_entry(local
, &close_lru
, so_close_lru
) {
1968 if (local
->so_id
== st_id
)
1976 nfs4_check_fh(struct svc_fh
*fhp
, struct nfs4_stateid
*stp
)
1978 return fhp
->fh_dentry
->d_inode
!= stp
->st_vfs_file
->f_dentry
->d_inode
;
1982 STALE_STATEID(stateid_t
*stateid
)
1984 if (stateid
->si_boot
== boot_time
)
1986 printk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n",
1987 stateid
->si_boot
, stateid
->si_stateownerid
, stateid
->si_fileid
,
1988 stateid
->si_generation
);
1993 access_permit_read(unsigned long access_bmap
)
1995 return test_bit(NFS4_SHARE_ACCESS_READ
, &access_bmap
) ||
1996 test_bit(NFS4_SHARE_ACCESS_BOTH
, &access_bmap
) ||
1997 test_bit(NFS4_SHARE_ACCESS_WRITE
, &access_bmap
);
2001 access_permit_write(unsigned long access_bmap
)
2003 return test_bit(NFS4_SHARE_ACCESS_WRITE
, &access_bmap
) ||
2004 test_bit(NFS4_SHARE_ACCESS_BOTH
, &access_bmap
);
2008 int nfs4_check_openmode(struct nfs4_stateid
*stp
, int flags
)
2010 int status
= nfserr_openmode
;
2012 if ((flags
& WR_STATE
) && (!access_permit_write(stp
->st_access_bmap
)))
2014 if ((flags
& RD_STATE
) && (!access_permit_read(stp
->st_access_bmap
)))
2022 check_special_stateids(svc_fh
*current_fh
, stateid_t
*stateid
, int flags
)
2024 /* Trying to call delegreturn with a special stateid? Yuch: */
2025 if (!(flags
& (RD_STATE
| WR_STATE
)))
2026 return nfserr_bad_stateid
;
2027 else if (ONE_STATEID(stateid
) && (flags
& RD_STATE
))
2029 else if (nfs4_in_grace()) {
2030 /* Answer in remaining cases depends on existance of
2031 * conflicting state; so we must wait out the grace period. */
2032 return nfserr_grace
;
2033 } else if (flags
& WR_STATE
)
2034 return nfs4_share_conflict(current_fh
,
2035 NFS4_SHARE_DENY_WRITE
);
2036 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
2037 return nfs4_share_conflict(current_fh
,
2038 NFS4_SHARE_DENY_READ
);
2042 * Allow READ/WRITE during grace period on recovered state only for files
2043 * that are not able to provide mandatory locking.
2046 io_during_grace_disallowed(struct inode
*inode
, int flags
)
2048 return nfs4_in_grace() && (flags
& (RD_STATE
| WR_STATE
))
2049 && MANDATORY_LOCK(inode
);
2053 * Checks for stateid operations
2056 nfs4_preprocess_stateid_op(struct svc_fh
*current_fh
, stateid_t
*stateid
, int flags
, struct file
**filpp
)
2058 struct nfs4_stateid
*stp
= NULL
;
2059 struct nfs4_delegation
*dp
= NULL
;
2061 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
2064 dprintk("NFSD: preprocess_stateid_op: stateid = (%08x/%08x/%08x/%08x)\n",
2065 stateid
->si_boot
, stateid
->si_stateownerid
,
2066 stateid
->si_fileid
, stateid
->si_generation
);
2070 if (io_during_grace_disallowed(ino
, flags
))
2071 return nfserr_grace
;
2073 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
2074 return check_special_stateids(current_fh
, stateid
, flags
);
2077 status
= nfserr_stale_stateid
;
2078 if (STALE_STATEID(stateid
))
2082 status
= nfserr_bad_stateid
;
2083 if (!stateid
->si_fileid
) { /* delegation stateid */
2084 if(!(dp
= find_delegation_stateid(ino
, stateid
))) {
2085 dprintk("NFSD: delegation stateid not found\n");
2086 if (nfs4_in_grace())
2087 status
= nfserr_grace
;
2090 stidp
= &dp
->dl_stateid
;
2091 } else { /* open or lock stateid */
2092 if (!(stp
= find_stateid(stateid
, flags
))) {
2093 dprintk("NFSD: open or lock stateid not found\n");
2094 if (nfs4_in_grace())
2095 status
= nfserr_grace
;
2098 if ((flags
& CHECK_FH
) && nfs4_check_fh(current_fh
, stp
))
2100 if (!stp
->st_stateowner
->so_confirmed
)
2102 stidp
= &stp
->st_stateid
;
2104 if (stateid
->si_generation
> stidp
->si_generation
)
2108 status
= nfserr_old_stateid
;
2109 if (stateid
->si_generation
< stidp
->si_generation
)
2112 if ((status
= nfs4_check_openmode(stp
,flags
)))
2114 renew_client(stp
->st_stateowner
->so_client
);
2116 *filpp
= stp
->st_vfs_file
;
2118 if ((status
= nfs4_check_delegmode(dp
, flags
)))
2120 renew_client(dp
->dl_client
);
2121 if (flags
& DELEG_RET
)
2122 unhash_delegation(dp
);
2124 *filpp
= dp
->dl_vfs_file
;
2133 * Checks for sequence id mutating operations.
2136 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
)
2139 struct nfs4_stateid
*stp
;
2140 struct nfs4_stateowner
*sop
;
2142 dprintk("NFSD: preprocess_seqid_op: seqid=%d "
2143 "stateid = (%08x/%08x/%08x/%08x)\n", seqid
,
2144 stateid
->si_boot
, stateid
->si_stateownerid
, stateid
->si_fileid
,
2145 stateid
->si_generation
);
2150 status
= nfserr_bad_stateid
;
2151 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
)) {
2152 printk("NFSD: preprocess_seqid_op: magic stateid!\n");
2156 status
= nfserr_stale_stateid
;
2157 if (STALE_STATEID(stateid
))
2160 * We return BAD_STATEID if filehandle doesn't match stateid,
2161 * the confirmed flag is incorrecly set, or the generation
2162 * number is incorrect.
2163 * If there is no entry in the openfile table for this id,
2164 * we can't always return BAD_STATEID;
2165 * this might be a retransmitted CLOSE which has arrived after
2166 * the openfile has been released.
2168 if (!(stp
= find_stateid(stateid
, flags
)))
2169 goto no_nfs4_stateid
;
2171 status
= nfserr_bad_stateid
;
2173 /* for new lock stateowners:
2174 * check that the lock->v.new.open_stateid
2175 * refers to an open stateowner
2177 * check that the lockclid (nfs4_lock->v.new.clientid) is the same
2178 * as the open_stateid->st_stateowner->so_client->clientid
2181 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
2182 struct nfs4_client
*clp
= sop
->so_client
;
2184 if (!sop
->so_is_open_owner
)
2186 if (!cmp_clid(&clp
->cl_clientid
, lockclid
))
2190 if ((flags
& CHECK_FH
) && nfs4_check_fh(current_fh
, stp
)) {
2191 printk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n");
2196 *sopp
= sop
= stp
->st_stateowner
;
2199 * We now validate the seqid and stateid generation numbers.
2200 * For the moment, we ignore the possibility of
2201 * generation number wraparound.
2203 if (seqid
!= sop
->so_seqid
+ 1)
2206 if (sop
->so_confirmed
) {
2207 if (flags
& CONFIRM
) {
2208 printk("NFSD: preprocess_seqid_op: expected unconfirmed stateowner!\n");
2213 if (!(flags
& CONFIRM
)) {
2214 printk("NFSD: preprocess_seqid_op: stateowner not confirmed yet!\n");
2218 if (stateid
->si_generation
> stp
->st_stateid
.si_generation
) {
2219 printk("NFSD: preprocess_seqid_op: future stateid?!\n");
2223 status
= nfserr_old_stateid
;
2224 if (stateid
->si_generation
< stp
->st_stateid
.si_generation
) {
2225 printk("NFSD: preprocess_seqid_op: old stateid!\n");
2228 /* XXX renew the client lease here */
2237 * We determine whether this is a bad stateid or a replay,
2238 * starting by trying to look up the stateowner.
2239 * If stateowner is not found - stateid is bad.
2241 if (!(sop
= find_openstateowner_id(stateid
->si_stateownerid
, flags
))) {
2242 printk("NFSD: preprocess_seqid_op: no stateowner or nfs4_stateid!\n");
2243 status
= nfserr_bad_stateid
;
2249 if (seqid
== sop
->so_seqid
) {
2250 printk("NFSD: preprocess_seqid_op: retransmission?\n");
2251 /* indicate replay to calling function */
2252 status
= NFSERR_REPLAY_ME
;
2254 printk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d\n", sop
->so_seqid
+1, seqid
);
2257 status
= nfserr_bad_seqid
;
2263 nfsd4_open_confirm(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open_confirm
*oc
)
2266 struct nfs4_stateowner
*sop
;
2267 struct nfs4_stateid
*stp
;
2269 dprintk("NFSD: nfsd4_open_confirm on file %.*s\n",
2270 (int)current_fh
->fh_dentry
->d_name
.len
,
2271 current_fh
->fh_dentry
->d_name
.name
);
2273 if ((status
= fh_verify(rqstp
, current_fh
, S_IFREG
, 0)))
2278 if ((status
= nfs4_preprocess_seqid_op(current_fh
, oc
->oc_seqid
,
2279 &oc
->oc_req_stateid
,
2280 CHECK_FH
| CONFIRM
| OPEN_STATE
,
2281 &oc
->oc_stateowner
, &stp
, NULL
)))
2284 sop
= oc
->oc_stateowner
;
2285 sop
->so_confirmed
= 1;
2286 update_stateid(&stp
->st_stateid
);
2287 memcpy(&oc
->oc_resp_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
2288 dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d "
2289 "stateid=(%08x/%08x/%08x/%08x)\n", oc
->oc_seqid
,
2290 stp
->st_stateid
.si_boot
,
2291 stp
->st_stateid
.si_stateownerid
,
2292 stp
->st_stateid
.si_fileid
,
2293 stp
->st_stateid
.si_generation
);
2295 if (oc
->oc_stateowner
)
2296 nfs4_get_stateowner(oc
->oc_stateowner
);
2297 nfs4_unlock_state();
2303 * unset all bits in union bitmap (bmap) that
2304 * do not exist in share (from successful OPEN_DOWNGRADE)
2307 reset_union_bmap_access(unsigned long access
, unsigned long *bmap
)
2310 for (i
= 1; i
< 4; i
++) {
2311 if ((i
& access
) != i
)
2312 __clear_bit(i
, bmap
);
2317 reset_union_bmap_deny(unsigned long deny
, unsigned long *bmap
)
2320 for (i
= 0; i
< 4; i
++) {
2321 if ((i
& deny
) != i
)
2322 __clear_bit(i
, bmap
);
2327 nfsd4_open_downgrade(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open_downgrade
*od
)
2330 struct nfs4_stateid
*stp
;
2331 unsigned int share_access
;
2333 dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n",
2334 (int)current_fh
->fh_dentry
->d_name
.len
,
2335 current_fh
->fh_dentry
->d_name
.name
);
2337 if (!TEST_ACCESS(od
->od_share_access
) || !TEST_DENY(od
->od_share_deny
))
2338 return nfserr_inval
;
2341 if ((status
= nfs4_preprocess_seqid_op(current_fh
, od
->od_seqid
,
2343 CHECK_FH
| OPEN_STATE
,
2344 &od
->od_stateowner
, &stp
, NULL
)))
2347 status
= nfserr_inval
;
2348 if (!test_bit(od
->od_share_access
, &stp
->st_access_bmap
)) {
2349 dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n",
2350 stp
->st_access_bmap
, od
->od_share_access
);
2353 if (!test_bit(od
->od_share_deny
, &stp
->st_deny_bmap
)) {
2354 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
2355 stp
->st_deny_bmap
, od
->od_share_deny
);
2358 set_access(&share_access
, stp
->st_access_bmap
);
2359 nfs4_file_downgrade(stp
->st_vfs_file
,
2360 share_access
& ~od
->od_share_access
);
2362 reset_union_bmap_access(od
->od_share_access
, &stp
->st_access_bmap
);
2363 reset_union_bmap_deny(od
->od_share_deny
, &stp
->st_deny_bmap
);
2365 update_stateid(&stp
->st_stateid
);
2366 memcpy(&od
->od_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
2369 if (od
->od_stateowner
)
2370 nfs4_get_stateowner(od
->od_stateowner
);
2371 nfs4_unlock_state();
2376 * nfs4_unlock_state() called after encode
2379 nfsd4_close(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_close
*close
)
2382 struct nfs4_stateid
*stp
;
2384 dprintk("NFSD: nfsd4_close on file %.*s\n",
2385 (int)current_fh
->fh_dentry
->d_name
.len
,
2386 current_fh
->fh_dentry
->d_name
.name
);
2389 /* check close_lru for replay */
2390 if ((status
= nfs4_preprocess_seqid_op(current_fh
, close
->cl_seqid
,
2392 CHECK_FH
| OPEN_STATE
| CLOSE_STATE
,
2393 &close
->cl_stateowner
, &stp
, NULL
)))
2396 * Return success, but first update the stateid.
2399 update_stateid(&stp
->st_stateid
);
2400 memcpy(&close
->cl_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
2402 /* release_state_owner() calls nfsd_close() if needed */
2403 release_state_owner(stp
, OPEN_STATE
);
2405 if (close
->cl_stateowner
)
2406 nfs4_get_stateowner(close
->cl_stateowner
);
2407 nfs4_unlock_state();
2412 nfsd4_delegreturn(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_delegreturn
*dr
)
2416 if ((status
= fh_verify(rqstp
, current_fh
, S_IFREG
, 0)))
2420 status
= nfs4_preprocess_stateid_op(current_fh
, &dr
->dr_stateid
, DELEG_RET
, NULL
);
2421 nfs4_unlock_state();
2428 * Lock owner state (byte-range locks)
2430 #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
2431 #define LOCK_HASH_BITS 8
2432 #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS)
2433 #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1)
2435 #define lockownerid_hashval(id) \
2436 ((id) & LOCK_HASH_MASK)
2438 static inline unsigned int
2439 lock_ownerstr_hashval(struct inode
*inode
, u32 cl_id
,
2440 struct xdr_netobj
*ownername
)
2442 return (file_hashval(inode
) + cl_id
2443 + opaque_hashval(ownername
->data
, ownername
->len
))
2447 static struct list_head lock_ownerid_hashtbl
[LOCK_HASH_SIZE
];
2448 static struct list_head lock_ownerstr_hashtbl
[LOCK_HASH_SIZE
];
2449 static struct list_head lockstateid_hashtbl
[STATEID_HASH_SIZE
];
2451 struct nfs4_stateid
*
2452 find_stateid(stateid_t
*stid
, int flags
)
2454 struct nfs4_stateid
*local
= NULL
;
2455 u32 st_id
= stid
->si_stateownerid
;
2456 u32 f_id
= stid
->si_fileid
;
2457 unsigned int hashval
;
2459 dprintk("NFSD: find_stateid flags 0x%x\n",flags
);
2460 if ((flags
& LOCK_STATE
) || (flags
& RD_STATE
) || (flags
& WR_STATE
)) {
2461 hashval
= stateid_hashval(st_id
, f_id
);
2462 list_for_each_entry(local
, &lockstateid_hashtbl
[hashval
], st_hash
) {
2463 if ((local
->st_stateid
.si_stateownerid
== st_id
) &&
2464 (local
->st_stateid
.si_fileid
== f_id
))
2468 if ((flags
& OPEN_STATE
) || (flags
& RD_STATE
) || (flags
& WR_STATE
)) {
2469 hashval
= stateid_hashval(st_id
, f_id
);
2470 list_for_each_entry(local
, &stateid_hashtbl
[hashval
], st_hash
) {
2471 if ((local
->st_stateid
.si_stateownerid
== st_id
) &&
2472 (local
->st_stateid
.si_fileid
== f_id
))
2476 printk("NFSD: find_stateid: ERROR: no state flag\n");
2480 static struct nfs4_delegation
*
2481 find_delegation_stateid(struct inode
*ino
, stateid_t
*stid
)
2483 struct nfs4_file
*fp
= NULL
;
2485 dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n",
2486 stid
->si_boot
, stid
->si_stateownerid
,
2487 stid
->si_fileid
, stid
->si_generation
);
2489 fp
= find_file(ino
);
2491 return find_delegation_file(fp
, stid
);
2496 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
2497 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
2498 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
2499 * locking, this prevents us from being completely protocol-compliant. The
2500 * real solution to this problem is to start using unsigned file offsets in
2501 * the VFS, but this is a very deep change!
2504 nfs4_transform_lock_offset(struct file_lock
*lock
)
2506 if (lock
->fl_start
< 0)
2507 lock
->fl_start
= OFFSET_MAX
;
2508 if (lock
->fl_end
< 0)
2509 lock
->fl_end
= OFFSET_MAX
;
2513 nfs4_verify_lock_stateowner(struct nfs4_stateowner
*sop
, unsigned int hashval
)
2515 struct nfs4_stateowner
*local
= NULL
;
2518 if (hashval
>= LOCK_HASH_SIZE
)
2520 list_for_each_entry(local
, &lock_ownerid_hashtbl
[hashval
], so_idhash
) {
2532 nfs4_set_lock_denied(struct file_lock
*fl
, struct nfsd4_lock_denied
*deny
)
2534 struct nfs4_stateowner
*sop
= (struct nfs4_stateowner
*) fl
->fl_owner
;
2535 unsigned int hval
= lockownerid_hashval(sop
->so_id
);
2537 deny
->ld_sop
= NULL
;
2538 if (nfs4_verify_lock_stateowner(sop
, hval
)) {
2539 kref_get(&sop
->so_ref
);
2541 deny
->ld_clientid
= sop
->so_client
->cl_clientid
;
2543 deny
->ld_start
= fl
->fl_start
;
2544 deny
->ld_length
= ~(u64
)0;
2545 if (fl
->fl_end
!= ~(u64
)0)
2546 deny
->ld_length
= fl
->fl_end
- fl
->fl_start
+ 1;
2547 deny
->ld_type
= NFS4_READ_LT
;
2548 if (fl
->fl_type
!= F_RDLCK
)
2549 deny
->ld_type
= NFS4_WRITE_LT
;
2552 static struct nfs4_stateowner
*
2553 find_lockstateowner(struct xdr_netobj
*owner
, clientid_t
*clid
)
2555 struct nfs4_stateowner
*local
= NULL
;
2558 for (i
= 0; i
< LOCK_HASH_SIZE
; i
++) {
2559 list_for_each_entry(local
, &lock_ownerid_hashtbl
[i
], so_idhash
) {
2560 if (!cmp_owner_str(local
, owner
, clid
))
2568 static struct nfs4_stateowner
*
2569 find_lockstateowner_str(struct inode
*inode
, clientid_t
*clid
,
2570 struct xdr_netobj
*owner
)
2572 unsigned int hashval
= lock_ownerstr_hashval(inode
, clid
->cl_id
, owner
);
2573 struct nfs4_stateowner
*op
;
2575 list_for_each_entry(op
, &lock_ownerstr_hashtbl
[hashval
], so_strhash
) {
2576 if (cmp_owner_str(op
, owner
, clid
))
2583 * Alloc a lock owner structure.
2584 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
2587 * strhashval = lock_ownerstr_hashval
2588 * so_seqid = lock->lk_new_lock_seqid - 1: it gets bumped in encode
2591 static struct nfs4_stateowner
*
2592 alloc_init_lock_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_stateid
*open_stp
, struct nfsd4_lock
*lock
) {
2593 struct nfs4_stateowner
*sop
;
2594 struct nfs4_replay
*rp
;
2595 unsigned int idhashval
;
2597 if (!(sop
= alloc_stateowner(&lock
->lk_new_owner
)))
2599 idhashval
= lockownerid_hashval(current_ownerid
);
2600 INIT_LIST_HEAD(&sop
->so_idhash
);
2601 INIT_LIST_HEAD(&sop
->so_strhash
);
2602 INIT_LIST_HEAD(&sop
->so_perclient
);
2603 INIT_LIST_HEAD(&sop
->so_perfilestate
);
2604 INIT_LIST_HEAD(&sop
->so_perlockowner
);
2605 INIT_LIST_HEAD(&sop
->so_close_lru
); /* not used */
2607 list_add(&sop
->so_idhash
, &lock_ownerid_hashtbl
[idhashval
]);
2608 list_add(&sop
->so_strhash
, &lock_ownerstr_hashtbl
[strhashval
]);
2609 list_add(&sop
->so_perlockowner
, &open_stp
->st_perlockowner
);
2610 sop
->so_is_open_owner
= 0;
2611 sop
->so_id
= current_ownerid
++;
2612 sop
->so_client
= clp
;
2613 sop
->so_seqid
= lock
->lk_new_lock_seqid
- 1;
2614 sop
->so_confirmed
= 1;
2615 rp
= &sop
->so_replay
;
2616 rp
->rp_status
= NFSERR_SERVERFAULT
;
2618 rp
->rp_buf
= rp
->rp_ibuf
;
2622 struct nfs4_stateid
*
2623 alloc_init_lock_stateid(struct nfs4_stateowner
*sop
, struct nfs4_file
*fp
, struct nfs4_stateid
*open_stp
)
2625 struct nfs4_stateid
*stp
;
2626 unsigned int hashval
= stateid_hashval(sop
->so_id
, fp
->fi_id
);
2628 stp
= nfs4_alloc_stateid();
2631 INIT_LIST_HEAD(&stp
->st_hash
);
2632 INIT_LIST_HEAD(&stp
->st_perfile
);
2633 INIT_LIST_HEAD(&stp
->st_perfilestate
);
2634 INIT_LIST_HEAD(&stp
->st_perlockowner
); /* not used */
2635 list_add(&stp
->st_hash
, &lockstateid_hashtbl
[hashval
]);
2636 list_add(&stp
->st_perfile
, &fp
->fi_perfile
);
2637 list_add(&stp
->st_perfilestate
, &sop
->so_perfilestate
);
2638 stp
->st_stateowner
= sop
;
2640 stp
->st_stateid
.si_boot
= boot_time
;
2641 stp
->st_stateid
.si_stateownerid
= sop
->so_id
;
2642 stp
->st_stateid
.si_fileid
= fp
->fi_id
;
2643 stp
->st_stateid
.si_generation
= 0;
2644 stp
->st_vfs_file
= open_stp
->st_vfs_file
; /* FIXME refcount?? */
2645 stp
->st_access_bmap
= open_stp
->st_access_bmap
;
2646 stp
->st_deny_bmap
= open_stp
->st_deny_bmap
;
2653 check_lock_length(u64 offset
, u64 length
)
2655 return ((length
== 0) || ((length
!= ~(u64
)0) &&
2656 LOFF_OVERFLOW(offset
, length
)));
2663 nfsd4_lock(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_lock
*lock
)
2665 struct nfs4_stateowner
*lock_sop
= NULL
, *open_sop
= NULL
;
2666 struct nfs4_stateid
*lock_stp
;
2668 struct file_lock file_lock
;
2669 struct file_lock
*conflock
;
2671 unsigned int strhashval
;
2673 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
2674 (long long) lock
->lk_offset
,
2675 (long long) lock
->lk_length
);
2677 if (nfs4_in_grace() && !lock
->lk_reclaim
)
2678 return nfserr_grace
;
2679 if (!nfs4_in_grace() && lock
->lk_reclaim
)
2680 return nfserr_no_grace
;
2682 if (check_lock_length(lock
->lk_offset
, lock
->lk_length
))
2683 return nfserr_inval
;
2687 if (lock
->lk_is_new
) {
2689 * Client indicates that this is a new lockowner.
2690 * Use open owner and open stateid to create lock owner and lock
2693 struct nfs4_stateid
*open_stp
= NULL
;
2694 struct nfs4_file
*fp
;
2696 status
= nfserr_stale_clientid
;
2697 if (STALE_CLIENTID(&lock
->lk_new_clientid
)) {
2698 printk("NFSD: nfsd4_lock: clientid is stale!\n");
2702 /* is the new lock seqid presented by the client zero? */
2703 status
= nfserr_bad_seqid
;
2704 if (lock
->v
.new.lock_seqid
!= 0)
2707 /* validate and update open stateid and open seqid */
2708 status
= nfs4_preprocess_seqid_op(current_fh
,
2709 lock
->lk_new_open_seqid
,
2710 &lock
->lk_new_open_stateid
,
2711 CHECK_FH
| OPEN_STATE
,
2712 &open_sop
, &open_stp
,
2713 &lock
->v
.new.clientid
);
2715 if (lock
->lk_reclaim
)
2716 status
= nfserr_reclaim_bad
;
2719 /* create lockowner and lock stateid */
2720 fp
= open_stp
->st_file
;
2721 strhashval
= lock_ownerstr_hashval(fp
->fi_inode
,
2722 open_sop
->so_client
->cl_clientid
.cl_id
,
2723 &lock
->v
.new.owner
);
2725 * If we already have this lock owner, the client is in
2726 * error (or our bookeeping is wrong!)
2727 * for asking for a 'new lock'.
2729 status
= nfserr_bad_stateid
;
2730 lock_sop
= find_lockstateowner(&lock
->v
.new.owner
,
2731 &lock
->v
.new.clientid
);
2734 status
= nfserr_resource
;
2735 if (!(lock
->lk_stateowner
= alloc_init_lock_stateowner(strhashval
, open_sop
->so_client
, open_stp
, lock
)))
2737 if ((lock_stp
= alloc_init_lock_stateid(lock
->lk_stateowner
,
2738 fp
, open_stp
)) == NULL
) {
2739 release_stateowner(lock
->lk_stateowner
);
2740 lock
->lk_stateowner
= NULL
;
2743 /* bump the open seqid used to create the lock */
2744 open_sop
->so_seqid
++;
2746 /* lock (lock owner + lock stateid) already exists */
2747 status
= nfs4_preprocess_seqid_op(current_fh
,
2748 lock
->lk_old_lock_seqid
,
2749 &lock
->lk_old_lock_stateid
,
2750 CHECK_FH
| LOCK_STATE
,
2751 &lock
->lk_stateowner
, &lock_stp
, NULL
);
2755 /* lock->lk_stateowner and lock_stp have been created or found */
2756 filp
= lock_stp
->st_vfs_file
;
2758 if ((status
= fh_verify(rqstp
, current_fh
, S_IFREG
, MAY_LOCK
))) {
2759 printk("NFSD: nfsd4_lock: permission denied!\n");
2763 locks_init_lock(&file_lock
);
2764 switch (lock
->lk_type
) {
2767 file_lock
.fl_type
= F_RDLCK
;
2770 case NFS4_WRITEW_LT
:
2771 file_lock
.fl_type
= F_WRLCK
;
2774 status
= nfserr_inval
;
2777 file_lock
.fl_owner
= (fl_owner_t
) lock
->lk_stateowner
;
2778 file_lock
.fl_pid
= current
->tgid
;
2779 file_lock
.fl_file
= filp
;
2780 file_lock
.fl_flags
= FL_POSIX
;
2782 file_lock
.fl_start
= lock
->lk_offset
;
2783 if ((lock
->lk_length
== ~(u64
)0) ||
2784 LOFF_OVERFLOW(lock
->lk_offset
, lock
->lk_length
))
2785 file_lock
.fl_end
= ~(u64
)0;
2787 file_lock
.fl_end
= lock
->lk_offset
+ lock
->lk_length
- 1;
2788 nfs4_transform_lock_offset(&file_lock
);
2791 * Try to lock the file in the VFS.
2792 * Note: locks.c uses the BKL to protect the inode's lock list.
2795 status
= posix_lock_file(filp
, &file_lock
);
2796 if (file_lock
.fl_ops
&& file_lock
.fl_ops
->fl_release_private
)
2797 file_lock
.fl_ops
->fl_release_private(&file_lock
);
2798 dprintk("NFSD: nfsd4_lock: posix_lock_file status %d\n",status
);
2800 case 0: /* success! */
2801 update_stateid(&lock_stp
->st_stateid
);
2802 memcpy(&lock
->lk_resp_stateid
, &lock_stp
->st_stateid
,
2806 goto conflicting_lock
;
2808 status
= nfserr_deadlock
;
2810 dprintk("NFSD: nfsd4_lock: posix_lock_file() failed! status %d\n",status
);
2811 goto out_destroy_new_stateid
;
2815 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
2816 status
= nfserr_denied
;
2817 /* XXX There is a race here. Future patch needed to provide
2818 * an atomic posix_lock_and_test_file
2820 if (!(conflock
= posix_test_lock(filp
, &file_lock
))) {
2821 status
= nfserr_serverfault
;
2824 nfs4_set_lock_denied(conflock
, &lock
->lk_denied
);
2826 out_destroy_new_stateid
:
2827 if (lock
->lk_is_new
) {
2828 dprintk("NFSD: nfsd4_lock: destroy new stateid!\n");
2830 * An error encountered after instantiation of the new
2831 * stateid has forced us to destroy it.
2833 if (!seqid_mutating_err(status
))
2834 open_sop
->so_seqid
--;
2836 release_state_owner(lock_stp
, LOCK_STATE
);
2839 if (lock
->lk_stateowner
)
2840 nfs4_get_stateowner(lock
->lk_stateowner
);
2841 nfs4_unlock_state();
2849 nfsd4_lockt(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_lockt
*lockt
)
2851 struct inode
*inode
;
2853 struct file_lock file_lock
;
2854 struct file_lock
*conflicting_lock
;
2857 if (nfs4_in_grace())
2858 return nfserr_grace
;
2860 if (check_lock_length(lockt
->lt_offset
, lockt
->lt_length
))
2861 return nfserr_inval
;
2863 lockt
->lt_stateowner
= NULL
;
2866 status
= nfserr_stale_clientid
;
2867 if (STALE_CLIENTID(&lockt
->lt_clientid
)) {
2868 printk("NFSD: nfsd4_lockt: clientid is stale!\n");
2872 if ((status
= fh_verify(rqstp
, current_fh
, S_IFREG
, 0))) {
2873 printk("NFSD: nfsd4_lockt: fh_verify() failed!\n");
2874 if (status
== nfserr_symlink
)
2875 status
= nfserr_inval
;
2879 inode
= current_fh
->fh_dentry
->d_inode
;
2880 locks_init_lock(&file_lock
);
2881 switch (lockt
->lt_type
) {
2884 file_lock
.fl_type
= F_RDLCK
;
2887 case NFS4_WRITEW_LT
:
2888 file_lock
.fl_type
= F_WRLCK
;
2891 printk("NFSD: nfs4_lockt: bad lock type!\n");
2892 status
= nfserr_inval
;
2896 lockt
->lt_stateowner
= find_lockstateowner_str(inode
,
2897 &lockt
->lt_clientid
, &lockt
->lt_owner
);
2898 if (lockt
->lt_stateowner
)
2899 file_lock
.fl_owner
= (fl_owner_t
)lockt
->lt_stateowner
;
2900 file_lock
.fl_pid
= current
->tgid
;
2901 file_lock
.fl_flags
= FL_POSIX
;
2903 file_lock
.fl_start
= lockt
->lt_offset
;
2904 if ((lockt
->lt_length
== ~(u64
)0) || LOFF_OVERFLOW(lockt
->lt_offset
, lockt
->lt_length
))
2905 file_lock
.fl_end
= ~(u64
)0;
2907 file_lock
.fl_end
= lockt
->lt_offset
+ lockt
->lt_length
- 1;
2909 nfs4_transform_lock_offset(&file_lock
);
2911 /* posix_test_lock uses the struct file _only_ to resolve the inode.
2912 * since LOCKT doesn't require an OPEN, and therefore a struct
2913 * file may not exist, pass posix_test_lock a struct file with
2914 * only the dentry:inode set.
2916 memset(&file
, 0, sizeof (struct file
));
2917 file
.f_dentry
= current_fh
->fh_dentry
;
2920 conflicting_lock
= posix_test_lock(&file
, &file_lock
);
2921 if (conflicting_lock
) {
2922 status
= nfserr_denied
;
2923 nfs4_set_lock_denied(conflicting_lock
, &lockt
->lt_denied
);
2926 nfs4_unlock_state();
2931 nfsd4_locku(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_locku
*locku
)
2933 struct nfs4_stateid
*stp
;
2934 struct file
*filp
= NULL
;
2935 struct file_lock file_lock
;
2938 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
2939 (long long) locku
->lu_offset
,
2940 (long long) locku
->lu_length
);
2942 if (check_lock_length(locku
->lu_offset
, locku
->lu_length
))
2943 return nfserr_inval
;
2947 if ((status
= nfs4_preprocess_seqid_op(current_fh
,
2950 CHECK_FH
| LOCK_STATE
,
2951 &locku
->lu_stateowner
, &stp
, NULL
)))
2954 filp
= stp
->st_vfs_file
;
2956 locks_init_lock(&file_lock
);
2957 file_lock
.fl_type
= F_UNLCK
;
2958 file_lock
.fl_owner
= (fl_owner_t
) locku
->lu_stateowner
;
2959 file_lock
.fl_pid
= current
->tgid
;
2960 file_lock
.fl_file
= filp
;
2961 file_lock
.fl_flags
= FL_POSIX
;
2962 file_lock
.fl_start
= locku
->lu_offset
;
2964 if ((locku
->lu_length
== ~(u64
)0) || LOFF_OVERFLOW(locku
->lu_offset
, locku
->lu_length
))
2965 file_lock
.fl_end
= ~(u64
)0;
2967 file_lock
.fl_end
= locku
->lu_offset
+ locku
->lu_length
- 1;
2968 nfs4_transform_lock_offset(&file_lock
);
2971 * Try to unlock the file in the VFS.
2973 status
= posix_lock_file(filp
, &file_lock
);
2974 if (file_lock
.fl_ops
&& file_lock
.fl_ops
->fl_release_private
)
2975 file_lock
.fl_ops
->fl_release_private(&file_lock
);
2977 printk("NFSD: nfs4_locku: posix_lock_file failed!\n");
2981 * OK, unlock succeeded; the only thing left to do is update the stateid.
2983 update_stateid(&stp
->st_stateid
);
2984 memcpy(&locku
->lu_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
2987 if (locku
->lu_stateowner
)
2988 nfs4_get_stateowner(locku
->lu_stateowner
);
2989 nfs4_unlock_state();
2993 status
= nfserrno(status
);
2999 * 1: locks held by lockowner
3000 * 0: no locks held by lockowner
3003 check_for_locks(struct file
*filp
, struct nfs4_stateowner
*lowner
)
3005 struct file_lock
**flpp
;
3006 struct inode
*inode
= filp
->f_dentry
->d_inode
;
3010 for (flpp
= &inode
->i_flock
; *flpp
!= NULL
; flpp
= &(*flpp
)->fl_next
) {
3011 if ((*flpp
)->fl_owner
== (fl_owner_t
)lowner
)
3021 nfsd4_release_lockowner(struct svc_rqst
*rqstp
, struct nfsd4_release_lockowner
*rlockowner
)
3023 clientid_t
*clid
= &rlockowner
->rl_clientid
;
3024 struct nfs4_stateowner
*local
= NULL
;
3025 struct xdr_netobj
*owner
= &rlockowner
->rl_owner
;
3028 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
3029 clid
->cl_boot
, clid
->cl_id
);
3031 /* XXX check for lease expiration */
3033 status
= nfserr_stale_clientid
;
3034 if (STALE_CLIENTID(clid
)) {
3035 printk("NFSD: nfsd4_release_lockowner: clientid is stale!\n");
3042 local
= find_lockstateowner(owner
, clid
);
3044 struct nfs4_stateid
*stp
;
3046 /* check for any locks held by any stateid
3047 * associated with the (lock) stateowner */
3048 status
= nfserr_locks_held
;
3049 list_for_each_entry(stp
, &local
->so_perfilestate
,
3051 if (check_for_locks(stp
->st_vfs_file
, local
))
3054 /* no locks held by (lock) stateowner */
3056 release_stateowner(local
);
3059 nfs4_unlock_state();
3063 static inline struct nfs4_client_reclaim
*
3064 alloc_reclaim(int namelen
)
3066 struct nfs4_client_reclaim
*crp
= NULL
;
3068 crp
= kmalloc(sizeof(struct nfs4_client_reclaim
), GFP_KERNEL
);
3071 crp
->cr_name
.data
= kmalloc(namelen
, GFP_KERNEL
);
3072 if (!crp
->cr_name
.data
) {
3080 * failure => all reset bets are off, nfserr_no_grace...
3083 nfs4_client_to_reclaim(char *name
, int namlen
)
3085 unsigned int strhashval
;
3086 struct nfs4_client_reclaim
*crp
= NULL
;
3088 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", namlen
, name
);
3089 crp
= alloc_reclaim(namlen
);
3092 strhashval
= clientstr_hashval(name
, namlen
);
3093 INIT_LIST_HEAD(&crp
->cr_strhash
);
3094 list_add(&crp
->cr_strhash
, &reclaim_str_hashtbl
[strhashval
]);
3095 memcpy(crp
->cr_name
.data
, name
, namlen
);
3096 crp
->cr_name
.len
= namlen
;
3097 reclaim_str_hashtbl_size
++;
3102 nfs4_release_reclaim(void)
3104 struct nfs4_client_reclaim
*crp
= NULL
;
3107 BUG_ON(!nfs4_reclaim_init
);
3108 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
3109 while (!list_empty(&reclaim_str_hashtbl
[i
])) {
3110 crp
= list_entry(reclaim_str_hashtbl
[i
].next
,
3111 struct nfs4_client_reclaim
, cr_strhash
);
3112 list_del(&crp
->cr_strhash
);
3113 kfree(crp
->cr_name
.data
);
3115 reclaim_str_hashtbl_size
--;
3118 BUG_ON(reclaim_str_hashtbl_size
);
3122 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
3123 struct nfs4_client_reclaim
*
3124 nfs4_find_reclaim_client(clientid_t
*clid
)
3126 unsigned int strhashval
;
3127 struct nfs4_client
*clp
;
3128 struct nfs4_client_reclaim
*crp
= NULL
;
3131 /* find clientid in conf_id_hashtbl */
3132 clp
= find_confirmed_client(clid
);
3136 dprintk("NFSD: nfs4_find_reclaim_client for %.*s\n",
3137 clp
->cl_name
.len
, clp
->cl_name
.data
);
3139 /* find clp->cl_name in reclaim_str_hashtbl */
3140 strhashval
= clientstr_hashval(clp
->cl_name
.data
, clp
->cl_name
.len
);
3141 list_for_each_entry(crp
, &reclaim_str_hashtbl
[strhashval
], cr_strhash
) {
3142 if (cmp_name(&crp
->cr_name
, &clp
->cl_name
)) {
3150 * Called from OPEN. Look for clientid in reclaim list.
3153 nfs4_check_open_reclaim(clientid_t
*clid
)
3155 struct nfs4_client_reclaim
*crp
;
3157 if ((crp
= nfs4_find_reclaim_client(clid
)) == NULL
)
3158 return nfserr_reclaim_bad
;
3164 * Start and stop routines
3168 __nfs4_state_init(void)
3173 if (!nfs4_reclaim_init
) {
3174 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++)
3175 INIT_LIST_HEAD(&reclaim_str_hashtbl
[i
]);
3176 reclaim_str_hashtbl_size
= 0;
3177 nfs4_reclaim_init
= 1;
3179 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
3180 INIT_LIST_HEAD(&conf_id_hashtbl
[i
]);
3181 INIT_LIST_HEAD(&conf_str_hashtbl
[i
]);
3182 INIT_LIST_HEAD(&unconf_str_hashtbl
[i
]);
3183 INIT_LIST_HEAD(&unconf_id_hashtbl
[i
]);
3185 for (i
= 0; i
< FILE_HASH_SIZE
; i
++) {
3186 INIT_LIST_HEAD(&file_hashtbl
[i
]);
3188 for (i
= 0; i
< OWNER_HASH_SIZE
; i
++) {
3189 INIT_LIST_HEAD(&ownerstr_hashtbl
[i
]);
3190 INIT_LIST_HEAD(&ownerid_hashtbl
[i
]);
3192 for (i
= 0; i
< STATEID_HASH_SIZE
; i
++) {
3193 INIT_LIST_HEAD(&stateid_hashtbl
[i
]);
3194 INIT_LIST_HEAD(&lockstateid_hashtbl
[i
]);
3196 for (i
= 0; i
< LOCK_HASH_SIZE
; i
++) {
3197 INIT_LIST_HEAD(&lock_ownerid_hashtbl
[i
]);
3198 INIT_LIST_HEAD(&lock_ownerstr_hashtbl
[i
]);
3200 memset(&zerostateid
, 0, sizeof(stateid_t
));
3201 memset(&onestateid
, ~0, sizeof(stateid_t
));
3203 INIT_LIST_HEAD(&close_lru
);
3204 INIT_LIST_HEAD(&client_lru
);
3205 INIT_LIST_HEAD(&del_recall_lru
);
3206 spin_lock_init(&recall_lock
);
3207 boot_time
= get_seconds();
3208 grace_time
= max(old_lease_time
, lease_time
);
3209 if (reclaim_str_hashtbl_size
== 0)
3212 printk("NFSD: starting %ld-second grace period\n", grace_time
);
3213 grace_end
= boot_time
+ grace_time
;
3214 INIT_WORK(&laundromat_work
,laundromat_main
, NULL
);
3215 schedule_delayed_work(&laundromat_work
, NFSD_LEASE_TIME
*HZ
);
3219 nfs4_state_init(void)
3225 status
= nfsd4_init_slabs();
3228 __nfs4_state_init();
3236 return get_seconds() < grace_end
;
3242 printk("NFSD: ERROR in reboot recovery. State reclaims will fail.\n");
3243 grace_end
= get_seconds();
3247 nfs4_lease_time(void)
3253 __nfs4_state_shutdown(void)
3256 struct nfs4_client
*clp
= NULL
;
3257 struct nfs4_delegation
*dp
= NULL
;
3258 struct nfs4_stateowner
*sop
= NULL
;
3259 struct list_head
*pos
, *next
, reaplist
;
3261 list_for_each_safe(pos
, next
, &close_lru
) {
3262 sop
= list_entry(pos
, struct nfs4_stateowner
, so_close_lru
);
3263 list_del(&sop
->so_close_lru
);
3264 nfs4_put_stateowner(sop
);
3267 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
3268 while (!list_empty(&conf_id_hashtbl
[i
])) {
3269 clp
= list_entry(conf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
3272 while (!list_empty(&unconf_str_hashtbl
[i
])) {
3273 clp
= list_entry(unconf_str_hashtbl
[i
].next
, struct nfs4_client
, cl_strhash
);
3277 INIT_LIST_HEAD(&reaplist
);
3278 spin_lock(&recall_lock
);
3279 list_for_each_safe(pos
, next
, &del_recall_lru
) {
3280 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3281 list_move(&dp
->dl_recall_lru
, &reaplist
);
3283 spin_unlock(&recall_lock
);
3284 list_for_each_safe(pos
, next
, &reaplist
) {
3285 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3286 list_del_init(&dp
->dl_recall_lru
);
3287 unhash_delegation(dp
);
3290 release_all_files();
3291 cancel_delayed_work(&laundromat_work
);
3292 flush_scheduled_work();
3297 nfs4_state_shutdown(void)
3300 nfs4_release_reclaim();
3301 __nfs4_state_shutdown();
3303 nfs4_unlock_state();
3307 * Called when leasetime is changed.
3309 * if nfsd is not started, simply set the global lease.
3311 * if nfsd(s) are running, lease change requires nfsv4 state to be reset.
3312 * e.g: boot_time is reset, existing nfs4_client structs are
3313 * used to fill reclaim_str_hashtbl, then all state (except for the
3314 * reclaim_str_hashtbl) is re-initialized.
3316 * if the old lease time is greater than the new lease time, the grace
3317 * period needs to be set to the old lease time to allow clients to reclaim
3318 * their state. XXX - we may want to set the grace period == lease time
3319 * after an initial grace period == old lease time
3321 * if an error occurs in this process, the new lease is set, but the server
3322 * will not honor OPEN or LOCK reclaims, and will return nfserr_no_grace
3323 * which means OPEN/LOCK/READ/WRITE will fail during grace period.
3325 * clients will attempt to reset all state with SETCLIENTID/CONFIRM, and
3326 * OPEN and LOCK reclaims.
3329 nfs4_reset_lease(time_t leasetime
)
3331 struct nfs4_client
*clp
;
3334 printk("NFSD: New leasetime %ld\n",leasetime
);
3338 old_lease_time
= lease_time
;
3339 lease_time
= leasetime
;
3341 nfs4_release_reclaim();
3343 /* populate reclaim_str_hashtbl with current confirmed nfs4_clientid */
3344 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
3345 list_for_each_entry(clp
, &conf_id_hashtbl
[i
], cl_idhash
) {
3346 if (!nfs4_client_to_reclaim(clp
->cl_name
.data
,
3347 clp
->cl_name
.len
)) {
3348 nfs4_release_reclaim();
3354 __nfs4_state_shutdown();
3355 __nfs4_state_init();
3356 nfs4_unlock_state();